git.sur5r.net Git - freertos/blob - FreeRTOS/Source/queue.c

   1 /*\r
   2     FreeRTOS V8.2.0 - Copyright (C) 2015 Real Time Engineers Ltd.\r
   3     All rights reserved\r
   4 \r
   5     VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
   6 \r
   7     This file is part of the FreeRTOS distribution.\r
   8 \r
   9     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  10     the terms of the GNU General Public License (version 2) as published by the\r
  11     Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
  12 \r
  13         ***************************************************************************\r
  14     >>!   NOTE: The modification to the GPL is included to allow you to     !<<\r
  15     >>!   distribute a combined work that includes FreeRTOS without being   !<<\r
  16     >>!   obliged to provide the source code for proprietary components     !<<\r
  17     >>!   outside of the FreeRTOS kernel.                                   !<<\r
  18         ***************************************************************************\r
  19 \r
  20     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
  21     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
  22     FOR A PARTICULAR PURPOSE.  Full license text is available on the following\r
  23     link: http://www.freertos.org/a00114.html\r
  24 \r
  25     ***************************************************************************\r
  26      *                                                                       *\r
  27      *    FreeRTOS provides completely free yet professionally developed,    *\r
  28      *    robust, strictly quality controlled, supported, and cross          *\r
  29      *    platform software that is more than just the market leader, it     *\r
  30      *    is the industry's de facto standard.                               *\r
  31      *                                                                       *\r
  32      *    Help yourself get started quickly while simultaneously helping     *\r
  33      *    to support the FreeRTOS project by purchasing a FreeRTOS           *\r
  34      *    tutorial book, reference manual, or both:                          *\r
  35      *    http://www.FreeRTOS.org/Documentation                              *\r
  36      *                                                                       *\r
  37     ***************************************************************************\r
  38 \r
  39     http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading\r
  40         the FAQ page "My application does not run, what could be wrong?".  Have you\r
  41         defined configASSERT()?\r
  42 \r
  43         http://www.FreeRTOS.org/support - In return for receiving this top quality\r
  44         embedded software for free we request you assist our global community by\r
  45         participating in the support forum.\r
  46 \r
  47         http://www.FreeRTOS.org/training - Investing in training allows your team to\r
  48         be as productive as possible as early as possible.  Now you can receive\r
  49         FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers\r
  50         Ltd, and the world's leading authority on the world's leading RTOS.\r
  51 \r
  52     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
  53     including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
  54     compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
  55 \r
  56     http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.\r
  57     Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.\r
  58 \r
  59     http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High\r
  60     Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS\r
  61     licenses offer ticketed support, indemnification and commercial middleware.\r
  62 \r
  63     http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
  64     engineered and independently SIL3 certified version for use in safety and\r
  65     mission critical applications that require provable dependability.\r
  66 \r
  67     1 tab == 4 spaces!\r
  68 */\r
  69 \r
  70 #include <stdlib.h>\r
  71 #include <string.h>\r
  72 \r
  73 /* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining\r
  74 all the API functions to use the MPU wrappers.  That should only be done when\r
  75 task.h is included from an application file. */\r
  76 #define MPU_WRAPPERS_INCLUDED_FROM_API_FILE\r
  77 \r
  78 #include "FreeRTOS.h"\r
  79 #include "task.h"\r
  80 #include "queue.h"\r
  81 \r
  82 #if ( configUSE_CO_ROUTINES == 1 )\r
  83         #include "croutine.h"\r
  84 #endif\r
  85 \r
  86 /* Lint e961 and e750 are suppressed as a MISRA exception justified because the\r
  87 MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be defined for the\r
  88 header files above, but not in this file, in order to generate the correct\r
  89 privileged Vs unprivileged linkage and placement. */\r
  90 #undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750. */\r
  91 \r
  92 \r
  93 /* Constants used with the xRxLock and xTxLock structure members. */\r
  94 #define queueUNLOCKED                                   ( ( BaseType_t ) -1 )\r
  95 #define queueLOCKED_UNMODIFIED                  ( ( BaseType_t ) 0 )\r
  96 \r
  97 /* When the Queue_t structure is used to represent a base queue its pcHead and\r
  98 pcTail members are used as pointers into the queue storage area.  When the\r
  99 Queue_t structure is used to represent a mutex pcHead and pcTail pointers are\r
 100 not necessary, and the pcHead pointer is set to NULL to indicate that the\r
 101 pcTail pointer actually points to the mutex holder (if any).  Map alternative\r
 102 names to the pcHead and pcTail structure members to ensure the readability of\r
 103 the code is maintained despite this dual use of two structure members.  An\r
 104 alternative implementation would be to use a union, but use of a union is\r
 105 against the coding standard (although an exception to the standard has been\r
 106 permitted where the dual use also significantly changes the type of the\r
 107 structure member). */\r
 108 #define pxMutexHolder                                   pcTail\r
 109 #define uxQueueType                                             pcHead\r
 110 #define queueQUEUE_IS_MUTEX                             NULL\r
 111 \r
 112 /* Semaphores do not actually store or copy data, so have an item size of\r
 113 zero. */\r
 114 #define queueSEMAPHORE_QUEUE_ITEM_LENGTH ( ( UBaseType_t ) 0 )\r
 115 #define queueMUTEX_GIVE_BLOCK_TIME               ( ( TickType_t ) 0U )\r
 116 \r
 117 #if( configUSE_PREEMPTION == 0 )\r
 118         /* If the cooperative scheduler is being used then a yield should not be\r
 119         performed just because a higher priority task has been woken. */\r
 120         #define queueYIELD_IF_USING_PREEMPTION()\r
 121 #else\r
 122         #define queueYIELD_IF_USING_PREEMPTION() portYIELD_WITHIN_API()\r
 123 #endif\r
 124 \r
 125 /*\r
 126  * Definition of the queue used by the scheduler.\r
 127  * Items are queued by copy, not reference.  See the following link for the\r
 128  * rationale: http://www.freertos.org/Embedded-RTOS-Queues.html\r
 129  */\r
 130 typedef struct QueueDefinition\r
 131 {\r
 132         int8_t *pcHead;                                 /*< Points to the beginning of the queue storage area. */\r
 133         int8_t *pcTail;                                 /*< Points to the byte at the end of the queue storage area.  Once more byte is allocated than necessary to store the queue items, this is used as a marker. */\r
 134         int8_t *pcWriteTo;                              /*< Points to the free next place in the storage area. */\r
 135 \r
 136         union                                                   /* Use of a union is an exception to the coding standard to ensure two mutually exclusive structure members don't appear simultaneously (wasting RAM). */\r
 137         {\r
 138                 int8_t *pcReadFrom;                     /*< Points to the last place that a queued item was read from when the structure is used as a queue. */\r
 139                 UBaseType_t uxRecursiveCallCount;/*< Maintains a count of the number of times a recursive mutex has been recursively 'taken' when the structure is used as a mutex. */\r
 140         } u;\r
 141 \r
 142         List_t xTasksWaitingToSend;             /*< List of tasks that are blocked waiting to post onto this queue.  Stored in priority order. */\r
 143         List_t xTasksWaitingToReceive;  /*< List of tasks that are blocked waiting to read from this queue.  Stored in priority order. */\r
 144 \r
 145         volatile UBaseType_t uxMessagesWaiting;/*< The number of items currently in the queue. */\r
 146         UBaseType_t uxLength;                   /*< The length of the queue defined as the number of items it will hold, not the number of bytes. */\r
 147         UBaseType_t uxItemSize;                 /*< The size of each items that the queue will hold. */\r
 148 \r
 149         volatile BaseType_t xRxLock;    /*< Stores the number of items received from the queue (removed from the queue) while the queue was locked.  Set to queueUNLOCKED when the queue is not locked. */\r
 150         volatile BaseType_t xTxLock;    /*< Stores the number of items transmitted to the queue (added to the queue) while the queue was locked.  Set to queueUNLOCKED when the queue is not locked. */\r
 151 \r
 152         #if ( configUSE_TRACE_FACILITY == 1 )\r
 153                 UBaseType_t uxQueueNumber;\r
 154                 uint8_t ucQueueType;\r
 155         #endif\r
 156 \r
 157         #if ( configUSE_QUEUE_SETS == 1 )\r
 158                 struct QueueDefinition *pxQueueSetContainer;\r
 159         #endif\r
 160 \r
 161 } xQUEUE;\r
 162 \r
 163 /* The old xQUEUE name is maintained above then typedefed to the new Queue_t\r
 164 name below to enable the use of older kernel aware debuggers. */\r
 165 typedef xQUEUE Queue_t;\r
 166 \r
 167 /*-----------------------------------------------------------*/\r
 168 \r
 169 /*\r
 170  * The queue registry is just a means for kernel aware debuggers to locate\r
 171  * queue structures.  It has no other purpose so is an optional component.\r
 172  */\r
 173 #if ( configQUEUE_REGISTRY_SIZE > 0 )\r
 174 \r
 175         /* The type stored within the queue registry array.  This allows a name\r
 176         to be assigned to each queue making kernel aware debugging a little\r
 177         more user friendly. */\r
 178         typedef struct QUEUE_REGISTRY_ITEM\r
 179         {\r
 180                 const char *pcQueueName; /*lint !e971 Unqualified char types are allowed for strings and single characters only. */\r
 181                 QueueHandle_t xHandle;\r
 182         } xQueueRegistryItem;\r
 183 \r
 184         /* The old xQueueRegistryItem name is maintained above then typedefed to the\r
 185         new xQueueRegistryItem name below to enable the use of older kernel aware\r
 186         debuggers. */\r
 187         typedef xQueueRegistryItem QueueRegistryItem_t;\r
 188 \r
 189         /* The queue registry is simply an array of QueueRegistryItem_t structures.\r
 190         The pcQueueName member of a structure being NULL is indicative of the\r
 191         array position being vacant. */\r
 192         QueueRegistryItem_t xQueueRegistry[ configQUEUE_REGISTRY_SIZE ];\r
 193 \r
 194 #endif /* configQUEUE_REGISTRY_SIZE */\r
 195 \r
 196 /*\r
 197  * Unlocks a queue locked by a call to prvLockQueue.  Locking a queue does not\r
 198  * prevent an ISR from adding or removing items to the queue, but does prevent\r
 199  * an ISR from removing tasks from the queue event lists.  If an ISR finds a\r
 200  * queue is locked it will instead increment the appropriate queue lock count\r
 201  * to indicate that a task may require unblocking.  When the queue in unlocked\r
 202  * these lock counts are inspected, and the appropriate action taken.\r
 203  */\r
 204 static void prvUnlockQueue( Queue_t * const pxQueue ) PRIVILEGED_FUNCTION;\r
 205 \r
 206 /*\r
 207  * Uses a critical section to determine if there is any data in a queue.\r
 208  *\r
 209  * @return pdTRUE if the queue contains no items, otherwise pdFALSE.\r
 210  */\r
 211 static BaseType_t prvIsQueueEmpty( const Queue_t *pxQueue ) PRIVILEGED_FUNCTION;\r
 212 \r
 213 /*\r
 214  * Uses a critical section to determine if there is any space in a queue.\r
 215  *\r
 216  * @return pdTRUE if there is no space, otherwise pdFALSE;\r
 217  */\r
 218 static BaseType_t prvIsQueueFull( const Queue_t *pxQueue ) PRIVILEGED_FUNCTION;\r
 219 \r
 220 /*\r
 221  * Copies an item into the queue, either at the front of the queue or the\r
 222  * back of the queue.\r
 223  */\r
 224 static BaseType_t prvCopyDataToQueue( Queue_t * const pxQueue, const void *pvItemToQueue, const BaseType_t xPosition ) PRIVILEGED_FUNCTION;\r
 225 \r
 226 /*\r
 227  * Copies an item out of a queue.\r
 228  */\r
 229 static void prvCopyDataFromQueue( Queue_t * const pxQueue, void * const pvBuffer ) PRIVILEGED_FUNCTION;\r
 230 \r
 231 #if ( configUSE_QUEUE_SETS == 1 )\r
 232         /*\r
 233          * Checks to see if a queue is a member of a queue set, and if so, notifies\r
 234          * the queue set that the queue contains data.\r
 235          */\r
 236         static BaseType_t prvNotifyQueueSetContainer( const Queue_t * const pxQueue, const BaseType_t xCopyPosition ) PRIVILEGED_FUNCTION;\r
 237 #endif\r
 238 \r
 239 /*-----------------------------------------------------------*/\r
 240 \r
 241 /*\r
 242  * Macro to mark a queue as locked.  Locking a queue prevents an ISR from\r
 243  * accessing the queue event lists.\r
 244  */\r
 245 #define prvLockQueue( pxQueue )                                                         \\r
 246         taskENTER_CRITICAL();                                                                   \\r
 247         {                                                                                                               \\r
 248                 if( ( pxQueue )->xRxLock == queueUNLOCKED )                     \\r
 249                 {                                                                                                       \\r
 250                         ( pxQueue )->xRxLock = queueLOCKED_UNMODIFIED;  \\r
 251                 }                                                                                                       \\r
 252                 if( ( pxQueue )->xTxLock == queueUNLOCKED )                     \\r
 253                 {                                                                                                       \\r
 254                         ( pxQueue )->xTxLock = queueLOCKED_UNMODIFIED;  \\r
 255                 }                                                                                                       \\r
 256         }                                                                                                               \\r
 257         taskEXIT_CRITICAL()\r
 258 /*-----------------------------------------------------------*/\r
 259 \r
 260 BaseType_t xQueueGenericReset( QueueHandle_t xQueue, BaseType_t xNewQueue )\r
 261 {\r
 262 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
 263 \r
 264         configASSERT( pxQueue );\r
 265 \r
 266         taskENTER_CRITICAL();\r
 267         {\r
 268                 pxQueue->pcTail = pxQueue->pcHead + ( pxQueue->uxLength * pxQueue->uxItemSize );\r
 269                 pxQueue->uxMessagesWaiting = ( UBaseType_t ) 0U;\r
 270                 pxQueue->pcWriteTo = pxQueue->pcHead;\r
 271                 pxQueue->u.pcReadFrom = pxQueue->pcHead + ( ( pxQueue->uxLength - ( UBaseType_t ) 1U ) * pxQueue->uxItemSize );\r
 272                 pxQueue->xRxLock = queueUNLOCKED;\r
 273                 pxQueue->xTxLock = queueUNLOCKED;\r
 274 \r
 275                 if( xNewQueue == pdFALSE )\r
 276                 {\r
 277                         /* If there are tasks blocked waiting to read from the queue, then\r
 278                         the tasks will remain blocked as after this function exits the queue\r
 279                         will still be empty.  If there are tasks blocked waiting to write to\r
 280                         the queue, then one should be unblocked as after this function exits\r
 281                         it will be possible to write to it. */\r
 282                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
 283                         {\r
 284                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) == pdTRUE )\r
 285                                 {\r
 286                                         queueYIELD_IF_USING_PREEMPTION();\r
 287                                 }\r
 288                                 else\r
 289                                 {\r
 290                                         mtCOVERAGE_TEST_MARKER();\r
 291                                 }\r
 292                         }\r
 293                         else\r
 294                         {\r
 295                                 mtCOVERAGE_TEST_MARKER();\r
 296                         }\r
 297                 }\r
 298                 else\r
 299                 {\r
 300                         /* Ensure the event queues start in the correct state. */\r
 301                         vListInitialise( &( pxQueue->xTasksWaitingToSend ) );\r
 302                         vListInitialise( &( pxQueue->xTasksWaitingToReceive ) );\r
 303                 }\r
 304         }\r
 305         taskEXIT_CRITICAL();\r
 306 \r
 307         /* A value is returned for calling semantic consistency with previous\r
 308         versions. */\r
 309         return pdPASS;\r
 310 }\r
 311 /*-----------------------------------------------------------*/\r
 312 \r
 313 QueueHandle_t xQueueGenericCreate( const UBaseType_t uxQueueLength, const UBaseType_t uxItemSize, const uint8_t ucQueueType )\r
 314 {\r
 315 Queue_t *pxNewQueue;\r
 316 size_t xQueueSizeInBytes;\r
 317 QueueHandle_t xReturn = NULL;\r
 318 int8_t *pcAllocatedBuffer;\r
 319 \r
 320         /* Remove compiler warnings about unused parameters should\r
 321         configUSE_TRACE_FACILITY not be set to 1. */\r
 322         ( void ) ucQueueType;\r
 323 \r
 324         configASSERT( uxQueueLength > ( UBaseType_t ) 0 );\r
 325 \r
 326         if( uxItemSize == ( UBaseType_t ) 0 )\r
 327         {\r
 328                 /* There is not going to be a queue storage area. */\r
 329                 xQueueSizeInBytes = ( size_t ) 0;\r
 330         }\r
 331         else\r
 332         {\r
 333                 /* The queue is one byte longer than asked for to make wrap checking\r
 334                 easier/faster. */\r
 335                 xQueueSizeInBytes = ( size_t ) ( uxQueueLength * uxItemSize ) + ( size_t ) 1; /*lint !e961 MISRA exception as the casts are only redundant for some ports. */\r
 336         }\r
 337 \r
 338         /* Allocate the new queue structure and storage area. */\r
 339         pcAllocatedBuffer = ( int8_t * ) pvPortMalloc( sizeof( Queue_t ) + xQueueSizeInBytes );\r
 340 \r
 341         if( pcAllocatedBuffer != NULL )\r
 342         {\r
 343                 pxNewQueue = ( Queue_t * ) pcAllocatedBuffer; /*lint !e826 MISRA The buffer cannot be to small because it was dimensioned by sizeof( Queue_t ) + xQueueSizeInBytes. */\r
 344 \r
 345                 if( uxItemSize == ( UBaseType_t ) 0 )\r
 346                 {\r
 347                         /* No RAM was allocated for the queue storage area, but PC head\r
 348                         cannot be set to NULL because NULL is used as a key to say the queue\r
 349                         is used as a mutex.  Therefore just set pcHead to point to the queue\r
 350                         as a benign value that is known to be within the memory map. */\r
 351                         pxNewQueue->pcHead = ( int8_t * ) pxNewQueue;\r
 352                 }\r
 353                 else\r
 354                 {\r
 355                         /* Jump past the queue structure to find the location of the queue\r
 356                         storage area - adding the padding bytes to get a better alignment. */\r
 357                         pxNewQueue->pcHead = pcAllocatedBuffer + sizeof( Queue_t );\r
 358                 }\r
 359 \r
 360                 /* Initialise the queue members as described above where the queue type\r
 361                 is defined. */\r
 362                 pxNewQueue->uxLength = uxQueueLength;\r
 363                 pxNewQueue->uxItemSize = uxItemSize;\r
 364                 ( void ) xQueueGenericReset( pxNewQueue, pdTRUE );\r
 365 \r
 366                 #if ( configUSE_TRACE_FACILITY == 1 )\r
 367                 {\r
 368                         pxNewQueue->ucQueueType = ucQueueType;\r
 369                 }\r
 370                 #endif /* configUSE_TRACE_FACILITY */\r
 371 \r
 372                 #if( configUSE_QUEUE_SETS == 1 )\r
 373                 {\r
 374                         pxNewQueue->pxQueueSetContainer = NULL;\r
 375                 }\r
 376                 #endif /* configUSE_QUEUE_SETS */\r
 377 \r
 378                 traceQUEUE_CREATE( pxNewQueue );\r
 379                 xReturn = pxNewQueue;\r
 380         }\r
 381         else\r
 382         {\r
 383                 mtCOVERAGE_TEST_MARKER();\r
 384         }\r
 385 \r
 386         configASSERT( xReturn );\r
 387 \r
 388         return xReturn;\r
 389 }\r
 390 /*-----------------------------------------------------------*/\r
 391 \r
 392 #if ( configUSE_MUTEXES == 1 )\r
 393 \r
 394         QueueHandle_t xQueueCreateMutex( const uint8_t ucQueueType )\r
 395         {\r
 396         Queue_t *pxNewQueue;\r
 397 \r
 398                 /* Prevent compiler warnings about unused parameters if\r
 399                 configUSE_TRACE_FACILITY does not equal 1. */\r
 400                 ( void ) ucQueueType;\r
 401 \r
 402                 /* Allocate the new queue structure. */\r
 403                 pxNewQueue = ( Queue_t * ) pvPortMalloc( sizeof( Queue_t ) );\r
 404                 if( pxNewQueue != NULL )\r
 405                 {\r
 406                         /* Information required for priority inheritance. */\r
 407                         pxNewQueue->pxMutexHolder = NULL;\r
 408                         pxNewQueue->uxQueueType = queueQUEUE_IS_MUTEX;\r
 409 \r
 410                         /* Queues used as a mutex no data is actually copied into or out\r
 411                         of the queue. */\r
 412                         pxNewQueue->pcWriteTo = NULL;\r
 413                         pxNewQueue->u.pcReadFrom = NULL;\r
 414 \r
 415                         /* Each mutex has a length of 1 (like a binary semaphore) and\r
 416                         an item size of 0 as nothing is actually copied into or out\r
 417                         of the mutex. */\r
 418                         pxNewQueue->uxMessagesWaiting = ( UBaseType_t ) 0U;\r
 419                         pxNewQueue->uxLength = ( UBaseType_t ) 1U;\r
 420                         pxNewQueue->uxItemSize = ( UBaseType_t ) 0U;\r
 421                         pxNewQueue->xRxLock = queueUNLOCKED;\r
 422                         pxNewQueue->xTxLock = queueUNLOCKED;\r
 423 \r
 424                         #if ( configUSE_TRACE_FACILITY == 1 )\r
 425                         {\r
 426                                 pxNewQueue->ucQueueType = ucQueueType;\r
 427                         }\r
 428                         #endif\r
 429 \r
 430                         #if ( configUSE_QUEUE_SETS == 1 )\r
 431                         {\r
 432                                 pxNewQueue->pxQueueSetContainer = NULL;\r
 433                         }\r
 434                         #endif\r
 435 \r
 436                         /* Ensure the event queues start with the correct state. */\r
 437                         vListInitialise( &( pxNewQueue->xTasksWaitingToSend ) );\r
 438                         vListInitialise( &( pxNewQueue->xTasksWaitingToReceive ) );\r
 439 \r
 440                         traceCREATE_MUTEX( pxNewQueue );\r
 441 \r
 442                         /* Start with the semaphore in the expected state. */\r
 443                         ( void ) xQueueGenericSend( pxNewQueue, NULL, ( TickType_t ) 0U, queueSEND_TO_BACK );\r
 444                 }\r
 445                 else\r
 446                 {\r
 447                         traceCREATE_MUTEX_FAILED();\r
 448                 }\r
 449 \r
 450                 configASSERT( pxNewQueue );\r
 451                 return pxNewQueue;\r
 452         }\r
 453 \r
 454 #endif /* configUSE_MUTEXES */\r
 455 /*-----------------------------------------------------------*/\r
 456 \r
 457 #if ( ( configUSE_MUTEXES == 1 ) && ( INCLUDE_xSemaphoreGetMutexHolder == 1 ) )\r
 458 \r
 459         void* xQueueGetMutexHolder( QueueHandle_t xSemaphore )\r
 460         {\r
 461         void *pxReturn;\r
 462 \r
 463                 /* This function is called by xSemaphoreGetMutexHolder(), and should not\r
 464                 be called directly.  Note:  This is a good way of determining if the\r
 465                 calling task is the mutex holder, but not a good way of determining the\r
 466                 identity of the mutex holder, as the holder may change between the\r
 467                 following critical section exiting and the function returning. */\r
 468                 taskENTER_CRITICAL();\r
 469                 {\r
 470                         if( ( ( Queue_t * ) xSemaphore )->uxQueueType == queueQUEUE_IS_MUTEX )\r
 471                         {\r
 472                                 pxReturn = ( void * ) ( ( Queue_t * ) xSemaphore )->pxMutexHolder;\r
 473                         }\r
 474                         else\r
 475                         {\r
 476                                 pxReturn = NULL;\r
 477                         }\r
 478                 }\r
 479                 taskEXIT_CRITICAL();\r
 480 \r
 481                 return pxReturn;\r
 482         } /*lint !e818 xSemaphore cannot be a pointer to const because it is a typedef. */\r
 483 \r
 484 #endif\r
 485 /*-----------------------------------------------------------*/\r
 486 \r
 487 #if ( configUSE_RECURSIVE_MUTEXES == 1 )\r
 488 \r
 489         BaseType_t xQueueGiveMutexRecursive( QueueHandle_t xMutex )\r
 490         {\r
 491         BaseType_t xReturn;\r
 492         Queue_t * const pxMutex = ( Queue_t * ) xMutex;\r
 493 \r
 494                 configASSERT( pxMutex );\r
 495 \r
 496                 /* If this is the task that holds the mutex then pxMutexHolder will not\r
 497                 change outside of this task.  If this task does not hold the mutex then\r
 498                 pxMutexHolder can never coincidentally equal the tasks handle, and as\r
 499                 this is the only condition we are interested in it does not matter if\r
 500                 pxMutexHolder is accessed simultaneously by another task.  Therefore no\r
 501                 mutual exclusion is required to test the pxMutexHolder variable. */\r
 502                 if( pxMutex->pxMutexHolder == ( void * ) xTaskGetCurrentTaskHandle() ) /*lint !e961 Not a redundant cast as TaskHandle_t is a typedef. */\r
 503                 {\r
 504                         traceGIVE_MUTEX_RECURSIVE( pxMutex );\r
 505 \r
 506                         /* uxRecursiveCallCount cannot be zero if pxMutexHolder is equal to\r
 507                         the task handle, therefore no underflow check is required.  Also,\r
 508                         uxRecursiveCallCount is only modified by the mutex holder, and as\r
 509                         there can only be one, no mutual exclusion is required to modify the\r
 510                         uxRecursiveCallCount member. */\r
 511                         ( pxMutex->u.uxRecursiveCallCount )--;\r
 512 \r
 513                         /* Have we unwound the call count? */\r
 514                         if( pxMutex->u.uxRecursiveCallCount == ( UBaseType_t ) 0 )\r
 515                         {\r
 516                                 /* Return the mutex.  This will automatically unblock any other\r
 517                                 task that might be waiting to access the mutex. */\r
 518                                 ( void ) xQueueGenericSend( pxMutex, NULL, queueMUTEX_GIVE_BLOCK_TIME, queueSEND_TO_BACK );\r
 519                         }\r
 520                         else\r
 521                         {\r
 522                                 mtCOVERAGE_TEST_MARKER();\r
 523                         }\r
 524 \r
 525                         xReturn = pdPASS;\r
 526                 }\r
 527                 else\r
 528                 {\r
 529                         /* The mutex cannot be given because the calling task is not the\r
 530                         holder. */\r
 531                         xReturn = pdFAIL;\r
 532 \r
 533                         traceGIVE_MUTEX_RECURSIVE_FAILED( pxMutex );\r
 534                 }\r
 535 \r
 536                 return xReturn;\r
 537         }\r
 538 \r
 539 #endif /* configUSE_RECURSIVE_MUTEXES */\r
 540 /*-----------------------------------------------------------*/\r
 541 \r
 542 #if ( configUSE_RECURSIVE_MUTEXES == 1 )\r
 543 \r
 544         BaseType_t xQueueTakeMutexRecursive( QueueHandle_t xMutex, TickType_t xTicksToWait )\r
 545         {\r
 546         BaseType_t xReturn;\r
 547         Queue_t * const pxMutex = ( Queue_t * ) xMutex;\r
 548 \r
 549                 configASSERT( pxMutex );\r
 550 \r
 551                 /* Comments regarding mutual exclusion as per those within\r
 552                 xQueueGiveMutexRecursive(). */\r
 553 \r
 554                 traceTAKE_MUTEX_RECURSIVE( pxMutex );\r
 555 \r
 556                 if( pxMutex->pxMutexHolder == ( void * ) xTaskGetCurrentTaskHandle() ) /*lint !e961 Cast is not redundant as TaskHandle_t is a typedef. */\r
 557                 {\r
 558                         ( pxMutex->u.uxRecursiveCallCount )++;\r
 559                         xReturn = pdPASS;\r
 560                 }\r
 561                 else\r
 562                 {\r
 563                         xReturn = xQueueGenericReceive( pxMutex, NULL, xTicksToWait, pdFALSE );\r
 564 \r
 565                         /* pdPASS will only be returned if the mutex was successfully\r
 566                         obtained.  The calling task may have entered the Blocked state\r
 567                         before reaching here. */\r
 568                         if( xReturn == pdPASS )\r
 569                         {\r
 570                                 ( pxMutex->u.uxRecursiveCallCount )++;\r
 571                         }\r
 572                         else\r
 573                         {\r
 574                                 traceTAKE_MUTEX_RECURSIVE_FAILED( pxMutex );\r
 575                         }\r
 576                 }\r
 577 \r
 578                 return xReturn;\r
 579         }\r
 580 \r
 581 #endif /* configUSE_RECURSIVE_MUTEXES */\r
 582 /*-----------------------------------------------------------*/\r
 583 \r
 584 #if ( configUSE_COUNTING_SEMAPHORES == 1 )\r
 585 \r
 586         QueueHandle_t xQueueCreateCountingSemaphore( const UBaseType_t uxMaxCount, const UBaseType_t uxInitialCount )\r
 587         {\r
 588         QueueHandle_t xHandle;\r
 589 \r
 590                 configASSERT( uxMaxCount != 0 );\r
 591                 configASSERT( uxInitialCount <= uxMaxCount );\r
 592 \r
 593                 xHandle = xQueueGenericCreate( uxMaxCount, queueSEMAPHORE_QUEUE_ITEM_LENGTH, queueQUEUE_TYPE_COUNTING_SEMAPHORE );\r
 594 \r
 595                 if( xHandle != NULL )\r
 596                 {\r
 597                         ( ( Queue_t * ) xHandle )->uxMessagesWaiting = uxInitialCount;\r
 598 \r
 599                         traceCREATE_COUNTING_SEMAPHORE();\r
 600                 }\r
 601                 else\r
 602                 {\r
 603                         traceCREATE_COUNTING_SEMAPHORE_FAILED();\r
 604                 }\r
 605 \r
 606                 configASSERT( xHandle );\r
 607                 return xHandle;\r
 608         }\r
 609 \r
 610 #endif /* configUSE_COUNTING_SEMAPHORES */\r
 611 /*-----------------------------------------------------------*/\r
 612 \r
 613 BaseType_t xQueueGenericSend( QueueHandle_t xQueue, const void * const pvItemToQueue, TickType_t xTicksToWait, const BaseType_t xCopyPosition )\r
 614 {\r
 615 BaseType_t xEntryTimeSet = pdFALSE, xYieldRequired;\r
 616 TimeOut_t xTimeOut;\r
 617 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
 618 \r
 619         configASSERT( pxQueue );\r
 620         configASSERT( !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
 621         configASSERT( !( ( xCopyPosition == queueOVERWRITE ) && ( pxQueue->uxLength != 1 ) ) );\r
 622         #if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )\r
 623         {\r
 624                 configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );\r
 625         }\r
 626         #endif\r
 627 \r
 628 \r
 629         /* This function relaxes the coding standard somewhat to allow return\r
 630         statements within the function itself.  This is done in the interest\r
 631         of execution time efficiency. */\r
 632         for( ;; )\r
 633         {\r
 634                 taskENTER_CRITICAL();\r
 635                 {\r
 636                         /* Is there room on the queue now?  The running task must be\r
 637                         the highest priority task wanting to access the queue.  If\r
 638                         the head item in the queue is to be overwritten then it does\r
 639                         not matter if the queue is full. */\r
 640                         if( ( pxQueue->uxMessagesWaiting < pxQueue->uxLength ) || ( xCopyPosition == queueOVERWRITE ) )\r
 641                         {\r
 642                                 traceQUEUE_SEND( pxQueue );\r
 643                                 xYieldRequired = prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );\r
 644 \r
 645                                 #if ( configUSE_QUEUE_SETS == 1 )\r
 646                                 {\r
 647                                         if( pxQueue->pxQueueSetContainer != NULL )\r
 648                                         {\r
 649                                                 if( prvNotifyQueueSetContainer( pxQueue, xCopyPosition ) == pdTRUE )\r
 650                                                 {\r
 651                                                         /* The queue is a member of a queue set, and posting\r
 652                                                         to the queue set caused a higher priority task to\r
 653                                                         unblock. A context switch is required. */\r
 654                                                         queueYIELD_IF_USING_PREEMPTION();\r
 655                                                 }\r
 656                                                 else\r
 657                                                 {\r
 658                                                         mtCOVERAGE_TEST_MARKER();\r
 659                                                 }\r
 660                                         }\r
 661                                         else\r
 662                                         {\r
 663                                                 /* If there was a task waiting for data to arrive on the\r
 664                                                 queue then unblock it now. */\r
 665                                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
 666                                                 {\r
 667                                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) == pdTRUE )\r
 668                                                         {\r
 669                                                                 /* The unblocked task has a priority higher than\r
 670                                                                 our own so yield immediately.  Yes it is ok to\r
 671                                                                 do this from within the critical section - the\r
 672                                                                 kernel takes care of that. */\r
 673                                                                 queueYIELD_IF_USING_PREEMPTION();\r
 674                                                         }\r
 675                                                         else\r
 676                                                         {\r
 677                                                                 mtCOVERAGE_TEST_MARKER();\r
 678                                                         }\r
 679                                                 }\r
 680                                                 else if( xYieldRequired != pdFALSE )\r
 681                                                 {\r
 682                                                         /* This path is a special case that will only get\r
 683                                                         executed if the task was holding multiple mutexes\r
 684                                                         and the mutexes were given back in an order that is\r
 685                                                         different to that in which they were taken. */\r
 686                                                         queueYIELD_IF_USING_PREEMPTION();\r
 687                                                 }\r
 688                                                 else\r
 689                                                 {\r
 690                                                         mtCOVERAGE_TEST_MARKER();\r
 691                                                 }\r
 692                                         }\r
 693                                 }\r
 694                                 #else /* configUSE_QUEUE_SETS */\r
 695                                 {\r
 696                                         /* If there was a task waiting for data to arrive on the\r
 697                                         queue then unblock it now. */\r
 698                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
 699                                         {\r
 700                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) == pdTRUE )\r
 701                                                 {\r
 702                                                         /* The unblocked task has a priority higher than\r
 703                                                         our own so yield immediately.  Yes it is ok to do\r
 704                                                         this from within the critical section - the kernel\r
 705                                                         takes care of that. */\r
 706                                                         queueYIELD_IF_USING_PREEMPTION();\r
 707                                                 }\r
 708                                                 else\r
 709                                                 {\r
 710                                                         mtCOVERAGE_TEST_MARKER();\r
 711                                                 }\r
 712                                         }\r
 713                                         else if( xYieldRequired != pdFALSE )\r
 714                                         {\r
 715                                                 /* This path is a special case that will only get\r
 716                                                 executed if the task was holding multiple mutexes and\r
 717                                                 the mutexes were given back in an order that is\r
 718                                                 different to that in which they were taken. */\r
 719                                                 queueYIELD_IF_USING_PREEMPTION();\r
 720                                         }\r
 721                                         else\r
 722                                         {\r
 723                                                 mtCOVERAGE_TEST_MARKER();\r
 724                                         }\r
 725                                 }\r
 726                                 #endif /* configUSE_QUEUE_SETS */\r
 727 \r
 728                                 taskEXIT_CRITICAL();\r
 729                                 return pdPASS;\r
 730                         }\r
 731                         else\r
 732                         {\r
 733                                 if( xTicksToWait == ( TickType_t ) 0 )\r
 734                                 {\r
 735                                         /* The queue was full and no block time is specified (or\r
 736                                         the block time has expired) so leave now. */\r
 737                                         taskEXIT_CRITICAL();\r
 738 \r
 739                                         /* Return to the original privilege level before exiting\r
 740                                         the function. */\r
 741                                         traceQUEUE_SEND_FAILED( pxQueue );\r
 742                                         return errQUEUE_FULL;\r
 743                                 }\r
 744                                 else if( xEntryTimeSet == pdFALSE )\r
 745                                 {\r
 746                                         /* The queue was full and a block time was specified so\r
 747                                         configure the timeout structure. */\r
 748                                         vTaskSetTimeOutState( &xTimeOut );\r
 749                                         xEntryTimeSet = pdTRUE;\r
 750                                 }\r
 751                                 else\r
 752                                 {\r
 753                                         /* Entry time was already set. */\r
 754                                         mtCOVERAGE_TEST_MARKER();\r
 755                                 }\r
 756                         }\r
 757                 }\r
 758                 taskEXIT_CRITICAL();\r
 759 \r
 760                 /* Interrupts and other tasks can send to and receive from the queue\r
 761                 now the critical section has been exited. */\r
 762 \r
 763                 vTaskSuspendAll();\r
 764                 prvLockQueue( pxQueue );\r
 765 \r
 766                 /* Update the timeout state to see if it has expired yet. */\r
 767                 if( xTaskCheckForTimeOut( &xTimeOut, &xTicksToWait ) == pdFALSE )\r
 768                 {\r
 769                         if( prvIsQueueFull( pxQueue ) != pdFALSE )\r
 770                         {\r
 771                                 traceBLOCKING_ON_QUEUE_SEND( pxQueue );\r
 772                                 vTaskPlaceOnEventList( &( pxQueue->xTasksWaitingToSend ), xTicksToWait );\r
 773 \r
 774                                 /* Unlocking the queue means queue events can effect the\r
 775                                 event list.  It is possible     that interrupts occurring now\r
 776                                 remove this task from the event list again - but as the\r
 777                                 scheduler is suspended the task will go onto the pending\r
 778                                 ready last instead of the actual ready list. */\r
 779                                 prvUnlockQueue( pxQueue );\r
 780 \r
 781                                 /* Resuming the scheduler will move tasks from the pending\r
 782                                 ready list into the ready list - so it is feasible that this\r
 783                                 task is already in a ready list before it yields - in which\r
 784                                 case the yield will not cause a context switch unless there\r
 785                                 is also a higher priority task in the pending ready list. */\r
 786                                 if( xTaskResumeAll() == pdFALSE )\r
 787                                 {\r
 788                                         portYIELD_WITHIN_API();\r
 789                                 }\r
 790                         }\r
 791                         else\r
 792                         {\r
 793                                 /* Try again. */\r
 794                                 prvUnlockQueue( pxQueue );\r
 795                                 ( void ) xTaskResumeAll();\r
 796                         }\r
 797                 }\r
 798                 else\r
 799                 {\r
 800                         /* The timeout has expired. */\r
 801                         prvUnlockQueue( pxQueue );\r
 802                         ( void ) xTaskResumeAll();\r
 803 \r
 804                         /* Return to the original privilege level before exiting the\r
 805                         function. */\r
 806                         traceQUEUE_SEND_FAILED( pxQueue );\r
 807                         return errQUEUE_FULL;\r
 808                 }\r
 809         }\r
 810 }\r
 811 /*-----------------------------------------------------------*/\r
 812 \r
 813 #if ( configUSE_ALTERNATIVE_API == 1 )\r
 814 \r
 815         BaseType_t xQueueAltGenericSend( QueueHandle_t xQueue, const void * const pvItemToQueue, TickType_t xTicksToWait, BaseType_t xCopyPosition )\r
 816         {\r
 817         BaseType_t xEntryTimeSet = pdFALSE;\r
 818         TimeOut_t xTimeOut;\r
 819         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
 820 \r
 821                 configASSERT( pxQueue );\r
 822                 configASSERT( !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
 823 \r
 824                 for( ;; )\r
 825                 {\r
 826                         taskENTER_CRITICAL();\r
 827                         {\r
 828                                 /* Is there room on the queue now?  To be running we must be\r
 829                                 the highest priority task wanting to access the queue. */\r
 830                                 if( pxQueue->uxMessagesWaiting < pxQueue->uxLength )\r
 831                                 {\r
 832                                         traceQUEUE_SEND( pxQueue );\r
 833                                         prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );\r
 834 \r
 835                                         /* If there was a task waiting for data to arrive on the\r
 836                                         queue then unblock it now. */\r
 837                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
 838                                         {\r
 839                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) == pdTRUE )\r
 840                                                 {\r
 841                                                         /* The unblocked task has a priority higher than\r
 842                                                         our own so yield immediately. */\r
 843                                                         portYIELD_WITHIN_API();\r
 844                                                 }\r
 845                                                 else\r
 846                                                 {\r
 847                                                         mtCOVERAGE_TEST_MARKER();\r
 848                                                 }\r
 849                                         }\r
 850                                         else\r
 851                                         {\r
 852                                                 mtCOVERAGE_TEST_MARKER();\r
 853                                         }\r
 854 \r
 855                                         taskEXIT_CRITICAL();\r
 856                                         return pdPASS;\r
 857                                 }\r
 858                                 else\r
 859                                 {\r
 860                                         if( xTicksToWait == ( TickType_t ) 0 )\r
 861                                         {\r
 862                                                 taskEXIT_CRITICAL();\r
 863                                                 return errQUEUE_FULL;\r
 864                                         }\r
 865                                         else if( xEntryTimeSet == pdFALSE )\r
 866                                         {\r
 867                                                 vTaskSetTimeOutState( &xTimeOut );\r
 868                                                 xEntryTimeSet = pdTRUE;\r
 869                                         }\r
 870                                 }\r
 871                         }\r
 872                         taskEXIT_CRITICAL();\r
 873 \r
 874                         taskENTER_CRITICAL();\r
 875                         {\r
 876                                 if( xTaskCheckForTimeOut( &xTimeOut, &xTicksToWait ) == pdFALSE )\r
 877                                 {\r
 878                                         if( prvIsQueueFull( pxQueue ) != pdFALSE )\r
 879                                         {\r
 880                                                 traceBLOCKING_ON_QUEUE_SEND( pxQueue );\r
 881                                                 vTaskPlaceOnEventList( &( pxQueue->xTasksWaitingToSend ), xTicksToWait );\r
 882                                                 portYIELD_WITHIN_API();\r
 883                                         }\r
 884                                         else\r
 885                                         {\r
 886                                                 mtCOVERAGE_TEST_MARKER();\r
 887                                         }\r
 888                                 }\r
 889                                 else\r
 890                                 {\r
 891                                         taskEXIT_CRITICAL();\r
 892                                         traceQUEUE_SEND_FAILED( pxQueue );\r
 893                                         return errQUEUE_FULL;\r
 894                                 }\r
 895                         }\r
 896                         taskEXIT_CRITICAL();\r
 897                 }\r
 898         }\r
 899 \r
 900 #endif /* configUSE_ALTERNATIVE_API */\r
 901 /*-----------------------------------------------------------*/\r
 902 \r
 903 #if ( configUSE_ALTERNATIVE_API == 1 )\r
 904 \r
 905         BaseType_t xQueueAltGenericReceive( QueueHandle_t xQueue, void * const pvBuffer, TickType_t xTicksToWait, BaseType_t xJustPeeking )\r
 906         {\r
 907         BaseType_t xEntryTimeSet = pdFALSE;\r
 908         TimeOut_t xTimeOut;\r
 909         int8_t *pcOriginalReadPosition;\r
 910         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
 911 \r
 912                 configASSERT( pxQueue );\r
 913                 configASSERT( !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
 914 \r
 915                 for( ;; )\r
 916                 {\r
 917                         taskENTER_CRITICAL();\r
 918                         {\r
 919                                 if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
 920                                 {\r
 921                                         /* Remember our read position in case we are just peeking. */\r
 922                                         pcOriginalReadPosition = pxQueue->u.pcReadFrom;\r
 923 \r
 924                                         prvCopyDataFromQueue( pxQueue, pvBuffer );\r
 925 \r
 926                                         if( xJustPeeking == pdFALSE )\r
 927                                         {\r
 928                                                 traceQUEUE_RECEIVE( pxQueue );\r
 929 \r
 930                                                 /* Data is actually being removed (not just peeked). */\r
 931                                                 --( pxQueue->uxMessagesWaiting );\r
 932 \r
 933                                                 #if ( configUSE_MUTEXES == 1 )\r
 934                                                 {\r
 935                                                         if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
 936                                                         {\r
 937                                                                 /* Record the information required to implement\r
 938                                                                 priority inheritance should it become necessary. */\r
 939                                                                 pxQueue->pxMutexHolder = ( int8_t * ) xTaskGetCurrentTaskHandle();\r
 940                                                         }\r
 941                                                         else\r
 942                                                         {\r
 943                                                                 mtCOVERAGE_TEST_MARKER();\r
 944                                                         }\r
 945                                                 }\r
 946                                                 #endif\r
 947 \r
 948                                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
 949                                                 {\r
 950                                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) == pdTRUE )\r
 951                                                         {\r
 952                                                                 portYIELD_WITHIN_API();\r
 953                                                         }\r
 954                                                         else\r
 955                                                         {\r
 956                                                                 mtCOVERAGE_TEST_MARKER();\r
 957                                                         }\r
 958                                                 }\r
 959                                         }\r
 960                                         else\r
 961                                         {\r
 962                                                 traceQUEUE_PEEK( pxQueue );\r
 963 \r
 964                                                 /* The data is not being removed, so reset our read\r
 965                                                 pointer. */\r
 966                                                 pxQueue->u.pcReadFrom = pcOriginalReadPosition;\r
 967 \r
 968                                                 /* The data is being left in the queue, so see if there are\r
 969                                                 any other tasks waiting for the data. */\r
 970                                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
 971                                                 {\r
 972                                                         /* Tasks that are removed from the event list will get added to\r
 973                                                         the pending ready list as the scheduler is still suspended. */\r
 974                                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
 975                                                         {\r
 976                                                                 /* The task waiting has a higher priority than this task. */\r
 977                                                                 portYIELD_WITHIN_API();\r
 978                                                         }\r
 979                                                         else\r
 980                                                         {\r
 981                                                                 mtCOVERAGE_TEST_MARKER();\r
 982                                                         }\r
 983                                                 }\r
 984                                                 else\r
 985                                                 {\r
 986                                                         mtCOVERAGE_TEST_MARKER();\r
 987                                                 }\r
 988                                         }\r
 989 \r
 990                                         taskEXIT_CRITICAL();\r
 991                                         return pdPASS;\r
 992                                 }\r
 993                                 else\r
 994                                 {\r
 995                                         if( xTicksToWait == ( TickType_t ) 0 )\r
 996                                         {\r
 997                                                 taskEXIT_CRITICAL();\r
 998                                                 traceQUEUE_RECEIVE_FAILED( pxQueue );\r
 999                                                 return errQUEUE_EMPTY;\r
1000                                         }\r
1001                                         else if( xEntryTimeSet == pdFALSE )\r
1002                                         {\r
1003                                                 vTaskSetTimeOutState( &xTimeOut );\r
1004                                                 xEntryTimeSet = pdTRUE;\r
1005                                         }\r
1006                                 }\r
1007                         }\r
1008                         taskEXIT_CRITICAL();\r
1009 \r
1010                         taskENTER_CRITICAL();\r
1011                         {\r
1012                                 if( xTaskCheckForTimeOut( &xTimeOut, &xTicksToWait ) == pdFALSE )\r
1013                                 {\r
1014                                         if( prvIsQueueEmpty( pxQueue ) != pdFALSE )\r
1015                                         {\r
1016                                                 traceBLOCKING_ON_QUEUE_RECEIVE( pxQueue );\r
1017 \r
1018                                                 #if ( configUSE_MUTEXES == 1 )\r
1019                                                 {\r
1020                                                         if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
1021                                                         {\r
1022                                                                 taskENTER_CRITICAL();\r
1023                                                                 {\r
1024                                                                         vTaskPriorityInherit( ( void * ) pxQueue->pxMutexHolder );\r
1025                                                                 }\r
1026                                                                 taskEXIT_CRITICAL();\r
1027                                                         }\r
1028                                                         else\r
1029                                                         {\r
1030                                                                 mtCOVERAGE_TEST_MARKER();\r
1031                                                         }\r
1032                                                 }\r
1033                                                 #endif\r
1034 \r
1035                                                 vTaskPlaceOnEventList( &( pxQueue->xTasksWaitingToReceive ), xTicksToWait );\r
1036                                                 portYIELD_WITHIN_API();\r
1037                                         }\r
1038                                         else\r
1039                                         {\r
1040                                                 mtCOVERAGE_TEST_MARKER();\r
1041                                         }\r
1042                                 }\r
1043                                 else\r
1044                                 {\r
1045                                         taskEXIT_CRITICAL();\r
1046                                         traceQUEUE_RECEIVE_FAILED( pxQueue );\r
1047                                         return errQUEUE_EMPTY;\r
1048                                 }\r
1049                         }\r
1050                         taskEXIT_CRITICAL();\r
1051                 }\r
1052         }\r
1053 \r
1054 \r
1055 #endif /* configUSE_ALTERNATIVE_API */\r
1056 /*-----------------------------------------------------------*/\r
1057 \r
1058 BaseType_t xQueueGenericSendFromISR( QueueHandle_t xQueue, const void * const pvItemToQueue, BaseType_t * const pxHigherPriorityTaskWoken, const BaseType_t xCopyPosition )\r
1059 {\r
1060 BaseType_t xReturn;\r
1061 UBaseType_t uxSavedInterruptStatus;\r
1062 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1063 \r
1064         configASSERT( pxQueue );\r
1065         configASSERT( !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
1066         configASSERT( !( ( xCopyPosition == queueOVERWRITE ) && ( pxQueue->uxLength != 1 ) ) );\r
1067 \r
1068         /* RTOS ports that support interrupt nesting have the concept of a maximum\r
1069         system call (or maximum API call) interrupt priority.  Interrupts that are\r
1070         above the maximum system call priority are kept permanently enabled, even\r
1071         when the RTOS kernel is in a critical section, but cannot make any calls to\r
1072         FreeRTOS API functions.  If configASSERT() is defined in FreeRTOSConfig.h\r
1073         then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion\r
1074         failure if a FreeRTOS API function is called from an interrupt that has been\r
1075         assigned a priority above the configured maximum system call priority.\r
1076         Only FreeRTOS functions that end in FromISR can be called from interrupts\r
1077         that have been assigned a priority at or (logically) below the maximum\r
1078         system call     interrupt priority.  FreeRTOS maintains a separate interrupt\r
1079         safe API to ensure interrupt entry is as fast and as simple as possible.\r
1080         More information (albeit Cortex-M specific) is provided on the following\r
1081         link: http://www.freertos.org/RTOS-Cortex-M3-M4.html */\r
1082         portASSERT_IF_INTERRUPT_PRIORITY_INVALID();\r
1083 \r
1084         /* Similar to xQueueGenericSend, except without blocking if there is no room\r
1085         in the queue.  Also don't directly wake a task that was blocked on a queue\r
1086         read, instead return a flag to say whether a context switch is required or\r
1087         not (i.e. has a task with a higher priority than us been woken by this\r
1088         post). */\r
1089         uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();\r
1090         {\r
1091                 if( ( pxQueue->uxMessagesWaiting < pxQueue->uxLength ) || ( xCopyPosition == queueOVERWRITE ) )\r
1092                 {\r
1093                         traceQUEUE_SEND_FROM_ISR( pxQueue );\r
1094 \r
1095                         /* A task can only have an inherited priority if it is a mutex\r
1096                         holder - and if there is a mutex holder then the mutex cannot be\r
1097                         given from an ISR.  Therefore, unlike the xQueueGenericGive()\r
1098                         function, there is no need to determine the need for priority\r
1099                         disinheritance here or to clear the mutex holder TCB member. */\r
1100                         ( void ) prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );\r
1101 \r
1102                         /* The event list is not altered if the queue is locked.  This will\r
1103                         be done when the queue is unlocked later. */\r
1104                         if( pxQueue->xTxLock == queueUNLOCKED )\r
1105                         {\r
1106                                 #if ( configUSE_QUEUE_SETS == 1 )\r
1107                                 {\r
1108                                         if( pxQueue->pxQueueSetContainer != NULL )\r
1109                                         {\r
1110                                                 if( prvNotifyQueueSetContainer( pxQueue, xCopyPosition ) == pdTRUE )\r
1111                                                 {\r
1112                                                         /* The queue is a member of a queue set, and posting\r
1113                                                         to the queue set caused a higher priority task to\r
1114                                                         unblock.  A context switch is required. */\r
1115                                                         if( pxHigherPriorityTaskWoken != NULL )\r
1116                                                         {\r
1117                                                                 *pxHigherPriorityTaskWoken = pdTRUE;\r
1118                                                         }\r
1119                                                         else\r
1120                                                         {\r
1121                                                                 mtCOVERAGE_TEST_MARKER();\r
1122                                                         }\r
1123                                                 }\r
1124                                                 else\r
1125                                                 {\r
1126                                                         mtCOVERAGE_TEST_MARKER();\r
1127                                                 }\r
1128                                         }\r
1129                                         else\r
1130                                         {\r
1131                                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1132                                                 {\r
1133                                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1134                                                         {\r
1135                                                                 /* The task waiting has a higher priority so\r
1136                                                                 record that a context switch is required. */\r
1137                                                                 if( pxHigherPriorityTaskWoken != NULL )\r
1138                                                                 {\r
1139                                                                         *pxHigherPriorityTaskWoken = pdTRUE;\r
1140                                                                 }\r
1141                                                                 else\r
1142                                                                 {\r
1143                                                                         mtCOVERAGE_TEST_MARKER();\r
1144                                                                 }\r
1145                                                         }\r
1146                                                         else\r
1147                                                         {\r
1148                                                                 mtCOVERAGE_TEST_MARKER();\r
1149                                                         }\r
1150                                                 }\r
1151                                                 else\r
1152                                                 {\r
1153                                                         mtCOVERAGE_TEST_MARKER();\r
1154                                                 }\r
1155                                         }\r
1156                                 }\r
1157                                 #else /* configUSE_QUEUE_SETS */\r
1158                                 {\r
1159                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1160                                         {\r
1161                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1162                                                 {\r
1163                                                         /* The task waiting has a higher priority so record that a\r
1164                                                         context switch is required. */\r
1165                                                         if( pxHigherPriorityTaskWoken != NULL )\r
1166                                                         {\r
1167                                                                 *pxHigherPriorityTaskWoken = pdTRUE;\r
1168                                                         }\r
1169                                                         else\r
1170                                                         {\r
1171                                                                 mtCOVERAGE_TEST_MARKER();\r
1172                                                         }\r
1173                                                 }\r
1174                                                 else\r
1175                                                 {\r
1176                                                         mtCOVERAGE_TEST_MARKER();\r
1177                                                 }\r
1178                                         }\r
1179                                         else\r
1180                                         {\r
1181                                                 mtCOVERAGE_TEST_MARKER();\r
1182                                         }\r
1183                                 }\r
1184                                 #endif /* configUSE_QUEUE_SETS */\r
1185                         }\r
1186                         else\r
1187                         {\r
1188                                 /* Increment the lock count so the task that unlocks the queue\r
1189                                 knows that data was posted while it was locked. */\r
1190                                 ++( pxQueue->xTxLock );\r
1191                         }\r
1192 \r
1193                         xReturn = pdPASS;\r
1194                 }\r
1195                 else\r
1196                 {\r
1197                         traceQUEUE_SEND_FROM_ISR_FAILED( pxQueue );\r
1198                         xReturn = errQUEUE_FULL;\r
1199                 }\r
1200         }\r
1201         portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );\r
1202 \r
1203         return xReturn;\r
1204 }\r
1205 /*-----------------------------------------------------------*/\r
1206 \r
1207 BaseType_t xQueueGiveFromISR( QueueHandle_t xQueue, BaseType_t * const pxHigherPriorityTaskWoken )\r
1208 {\r
1209 BaseType_t xReturn;\r
1210 UBaseType_t uxSavedInterruptStatus;\r
1211 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1212 \r
1213         configASSERT( pxQueue );\r
1214 \r
1215         /* xQueueGenericSendFromISR() should be used in the item size is not 0. */\r
1216         configASSERT( pxQueue->uxItemSize == 0 );\r
1217 \r
1218         /* RTOS ports that support interrupt nesting have the concept of a maximum\r
1219         system call (or maximum API call) interrupt priority.  Interrupts that are\r
1220         above the maximum system call priority are kept permanently enabled, even\r
1221         when the RTOS kernel is in a critical section, but cannot make any calls to\r
1222         FreeRTOS API functions.  If configASSERT() is defined in FreeRTOSConfig.h\r
1223         then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion\r
1224         failure if a FreeRTOS API function is called from an interrupt that has been\r
1225         assigned a priority above the configured maximum system call priority.\r
1226         Only FreeRTOS functions that end in FromISR can be called from interrupts\r
1227         that have been assigned a priority at or (logically) below the maximum\r
1228         system call     interrupt priority.  FreeRTOS maintains a separate interrupt\r
1229         safe API to ensure interrupt entry is as fast and as simple as possible.\r
1230         More information (albeit Cortex-M specific) is provided on the following\r
1231         link: http://www.freertos.org/RTOS-Cortex-M3-M4.html */\r
1232         portASSERT_IF_INTERRUPT_PRIORITY_INVALID();\r
1233 \r
1234         /* Similar to xQueueGenericSendFromISR() but used with semaphores where the\r
1235         item size is 0.  Don't directly wake a task that was blocked on a queue\r
1236         read, instead return a flag to say whether a context switch is required or\r
1237         not (i.e. has a task with a higher priority than us been woken by this\r
1238         post). */\r
1239         uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();\r
1240         {\r
1241                 /* When the queue is used to implement a semaphore no data is ever\r
1242                 moved through the queue but it is still valid to see if the queue 'has\r
1243                 space'. */\r
1244                 if( pxQueue->uxMessagesWaiting < pxQueue->uxLength )\r
1245                 {\r
1246                         traceQUEUE_SEND_FROM_ISR( pxQueue );\r
1247 \r
1248                         /* A task can only have an inherited priority if it is a mutex\r
1249                         holder - and if there is a mutex holder then the mutex cannot be\r
1250                         given from an ISR.  Therefore, unlike the xQueueGenericGive()\r
1251                         function, there is no need to determine the need for priority\r
1252                         disinheritance here or to clear the mutex holder TCB member. */\r
1253 \r
1254                         ++( pxQueue->uxMessagesWaiting );\r
1255 \r
1256                         /* The event list is not altered if the queue is locked.  This will\r
1257                         be done when the queue is unlocked later. */\r
1258                         if( pxQueue->xTxLock == queueUNLOCKED )\r
1259                         {\r
1260                                 #if ( configUSE_QUEUE_SETS == 1 )\r
1261                                 {\r
1262                                         if( pxQueue->pxQueueSetContainer != NULL )\r
1263                                         {\r
1264                                                 if( prvNotifyQueueSetContainer( pxQueue, queueSEND_TO_BACK ) == pdTRUE )\r
1265                                                 {\r
1266                                                         /* The semaphore is a member of a queue set, and\r
1267                                                         posting to the queue set caused a higher priority\r
1268                                                         task to unblock.  A context switch is required. */\r
1269                                                         if( pxHigherPriorityTaskWoken != NULL )\r
1270                                                         {\r
1271                                                                 *pxHigherPriorityTaskWoken = pdTRUE;\r
1272                                                         }\r
1273                                                         else\r
1274                                                         {\r
1275                                                                 mtCOVERAGE_TEST_MARKER();\r
1276                                                         }\r
1277                                                 }\r
1278                                                 else\r
1279                                                 {\r
1280                                                         mtCOVERAGE_TEST_MARKER();\r
1281                                                 }\r
1282                                         }\r
1283                                         else\r
1284                                         {\r
1285                                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1286                                                 {\r
1287                                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1288                                                         {\r
1289                                                                 /* The task waiting has a higher priority so\r
1290                                                                 record that a context switch is required. */\r
1291                                                                 if( pxHigherPriorityTaskWoken != NULL )\r
1292                                                                 {\r
1293                                                                         *pxHigherPriorityTaskWoken = pdTRUE;\r
1294                                                                 }\r
1295                                                                 else\r
1296                                                                 {\r
1297                                                                         mtCOVERAGE_TEST_MARKER();\r
1298                                                                 }\r
1299                                                         }\r
1300                                                         else\r
1301                                                         {\r
1302                                                                 mtCOVERAGE_TEST_MARKER();\r
1303                                                         }\r
1304                                                 }\r
1305                                                 else\r
1306                                                 {\r
1307                                                         mtCOVERAGE_TEST_MARKER();\r
1308                                                 }\r
1309                                         }\r
1310                                 }\r
1311                                 #else /* configUSE_QUEUE_SETS */\r
1312                                 {\r
1313                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1314                                         {\r
1315                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1316                                                 {\r
1317                                                         /* The task waiting has a higher priority so record that a\r
1318                                                         context switch is required. */\r
1319                                                         if( pxHigherPriorityTaskWoken != NULL )\r
1320                                                         {\r
1321                                                                 *pxHigherPriorityTaskWoken = pdTRUE;\r
1322                                                         }\r
1323                                                         else\r
1324                                                         {\r
1325                                                                 mtCOVERAGE_TEST_MARKER();\r
1326                                                         }\r
1327                                                 }\r
1328                                                 else\r
1329                                                 {\r
1330                                                         mtCOVERAGE_TEST_MARKER();\r
1331                                                 }\r
1332                                         }\r
1333                                         else\r
1334                                         {\r
1335                                                 mtCOVERAGE_TEST_MARKER();\r
1336                                         }\r
1337                                 }\r
1338                                 #endif /* configUSE_QUEUE_SETS */\r
1339                         }\r
1340                         else\r
1341                         {\r
1342                                 /* Increment the lock count so the task that unlocks the queue\r
1343                                 knows that data was posted while it was locked. */\r
1344                                 ++( pxQueue->xTxLock );\r
1345                         }\r
1346 \r
1347                         xReturn = pdPASS;\r
1348                 }\r
1349                 else\r
1350                 {\r
1351                         traceQUEUE_SEND_FROM_ISR_FAILED( pxQueue );\r
1352                         xReturn = errQUEUE_FULL;\r
1353                 }\r
1354         }\r
1355         portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );\r
1356 \r
1357         return xReturn;\r
1358 }\r
1359 /*-----------------------------------------------------------*/\r
1360 \r
1361 BaseType_t xQueueGenericReceive( QueueHandle_t xQueue, void * const pvBuffer, TickType_t xTicksToWait, const BaseType_t xJustPeeking )\r
1362 {\r
1363 BaseType_t xEntryTimeSet = pdFALSE;\r
1364 TimeOut_t xTimeOut;\r
1365 int8_t *pcOriginalReadPosition;\r
1366 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1367 \r
1368         configASSERT( pxQueue );\r
1369         configASSERT( !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
1370         #if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )\r
1371         {\r
1372                 configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );\r
1373         }\r
1374         #endif\r
1375 \r
1376         /* This function relaxes the coding standard somewhat to allow return\r
1377         statements within the function itself.  This is done in the interest\r
1378         of execution time efficiency. */\r
1379 \r
1380         for( ;; )\r
1381         {\r
1382                 taskENTER_CRITICAL();\r
1383                 {\r
1384                         /* Is there data in the queue now?  To be running the calling task\r
1385                         must be the highest priority task wanting to access the queue. */\r
1386                         if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
1387                         {\r
1388                                 /* Remember the read position in case the queue is only being\r
1389                                 peeked. */\r
1390                                 pcOriginalReadPosition = pxQueue->u.pcReadFrom;\r
1391 \r
1392                                 prvCopyDataFromQueue( pxQueue, pvBuffer );\r
1393 \r
1394                                 if( xJustPeeking == pdFALSE )\r
1395                                 {\r
1396                                         traceQUEUE_RECEIVE( pxQueue );\r
1397 \r
1398                                         /* Actually removing data, not just peeking. */\r
1399                                         --( pxQueue->uxMessagesWaiting );\r
1400 \r
1401                                         #if ( configUSE_MUTEXES == 1 )\r
1402                                         {\r
1403                                                 if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
1404                                                 {\r
1405                                                         /* Record the information required to implement\r
1406                                                         priority inheritance should it become necessary. */\r
1407                                                         pxQueue->pxMutexHolder = ( int8_t * ) pvTaskIncrementMutexHeldCount(); /*lint !e961 Cast is not redundant as TaskHandle_t is a typedef. */\r
1408                                                 }\r
1409                                                 else\r
1410                                                 {\r
1411                                                         mtCOVERAGE_TEST_MARKER();\r
1412                                                 }\r
1413                                         }\r
1414                                         #endif /* configUSE_MUTEXES */\r
1415 \r
1416                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
1417                                         {\r
1418                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) == pdTRUE )\r
1419                                                 {\r
1420                                                         queueYIELD_IF_USING_PREEMPTION();\r
1421                                                 }\r
1422                                                 else\r
1423                                                 {\r
1424                                                         mtCOVERAGE_TEST_MARKER();\r
1425                                                 }\r
1426                                         }\r
1427                                         else\r
1428                                         {\r
1429                                                 mtCOVERAGE_TEST_MARKER();\r
1430                                         }\r
1431                                 }\r
1432                                 else\r
1433                                 {\r
1434                                         traceQUEUE_PEEK( pxQueue );\r
1435 \r
1436                                         /* The data is not being removed, so reset the read\r
1437                                         pointer. */\r
1438                                         pxQueue->u.pcReadFrom = pcOriginalReadPosition;\r
1439 \r
1440                                         /* The data is being left in the queue, so see if there are\r
1441                                         any other tasks waiting for the data. */\r
1442                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1443                                         {\r
1444                                                 /* Tasks that are removed from the event list will get added to\r
1445                                                 the pending ready list as the scheduler is still suspended. */\r
1446                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1447                                                 {\r
1448                                                         /* The task waiting has a higher priority than this task. */\r
1449                                                         queueYIELD_IF_USING_PREEMPTION();\r
1450                                                 }\r
1451                                                 else\r
1452                                                 {\r
1453                                                         mtCOVERAGE_TEST_MARKER();\r
1454                                                 }\r
1455                                         }\r
1456                                         else\r
1457                                         {\r
1458                                                 mtCOVERAGE_TEST_MARKER();\r
1459                                         }\r
1460                                 }\r
1461 \r
1462                                 taskEXIT_CRITICAL();\r
1463                                 return pdPASS;\r
1464                         }\r
1465                         else\r
1466                         {\r
1467                                 if( xTicksToWait == ( TickType_t ) 0 )\r
1468                                 {\r
1469                                         /* The queue was empty and no block time is specified (or\r
1470                                         the block time has expired) so leave now. */\r
1471                                         taskEXIT_CRITICAL();\r
1472                                         traceQUEUE_RECEIVE_FAILED( pxQueue );\r
1473                                         return errQUEUE_EMPTY;\r
1474                                 }\r
1475                                 else if( xEntryTimeSet == pdFALSE )\r
1476                                 {\r
1477                                         /* The queue was empty and a block time was specified so\r
1478                                         configure the timeout structure. */\r
1479                                         vTaskSetTimeOutState( &xTimeOut );\r
1480                                         xEntryTimeSet = pdTRUE;\r
1481                                 }\r
1482                                 else\r
1483                                 {\r
1484                                         /* Entry time was already set. */\r
1485                                         mtCOVERAGE_TEST_MARKER();\r
1486                                 }\r
1487                         }\r
1488                 }\r
1489                 taskEXIT_CRITICAL();\r
1490 \r
1491                 /* Interrupts and other tasks can send to and receive from the queue\r
1492                 now the critical section has been exited. */\r
1493 \r
1494                 vTaskSuspendAll();\r
1495                 prvLockQueue( pxQueue );\r
1496 \r
1497                 /* Update the timeout state to see if it has expired yet. */\r
1498                 if( xTaskCheckForTimeOut( &xTimeOut, &xTicksToWait ) == pdFALSE )\r
1499                 {\r
1500                         if( prvIsQueueEmpty( pxQueue ) != pdFALSE )\r
1501                         {\r
1502                                 traceBLOCKING_ON_QUEUE_RECEIVE( pxQueue );\r
1503 \r
1504                                 #if ( configUSE_MUTEXES == 1 )\r
1505                                 {\r
1506                                         if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
1507                                         {\r
1508                                                 taskENTER_CRITICAL();\r
1509                                                 {\r
1510                                                         vTaskPriorityInherit( ( void * ) pxQueue->pxMutexHolder );\r
1511                                                 }\r
1512                                                 taskEXIT_CRITICAL();\r
1513                                         }\r
1514                                         else\r
1515                                         {\r
1516                                                 mtCOVERAGE_TEST_MARKER();\r
1517                                         }\r
1518                                 }\r
1519                                 #endif\r
1520 \r
1521                                 vTaskPlaceOnEventList( &( pxQueue->xTasksWaitingToReceive ), xTicksToWait );\r
1522                                 prvUnlockQueue( pxQueue );\r
1523                                 if( xTaskResumeAll() == pdFALSE )\r
1524                                 {\r
1525                                         portYIELD_WITHIN_API();\r
1526                                 }\r
1527                                 else\r
1528                                 {\r
1529                                         mtCOVERAGE_TEST_MARKER();\r
1530                                 }\r
1531                         }\r
1532                         else\r
1533                         {\r
1534                                 /* Try again. */\r
1535                                 prvUnlockQueue( pxQueue );\r
1536                                 ( void ) xTaskResumeAll();\r
1537                         }\r
1538                 }\r
1539                 else\r
1540                 {\r
1541                         prvUnlockQueue( pxQueue );\r
1542                         ( void ) xTaskResumeAll();\r
1543                         traceQUEUE_RECEIVE_FAILED( pxQueue );\r
1544                         return errQUEUE_EMPTY;\r
1545                 }\r
1546         }\r
1547 }\r
1548 /*-----------------------------------------------------------*/\r
1549 \r
1550 BaseType_t xQueueReceiveFromISR( QueueHandle_t xQueue, void * const pvBuffer, BaseType_t * const pxHigherPriorityTaskWoken )\r
1551 {\r
1552 BaseType_t xReturn;\r
1553 UBaseType_t uxSavedInterruptStatus;\r
1554 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1555 \r
1556         configASSERT( pxQueue );\r
1557         configASSERT( !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
1558 \r
1559         /* RTOS ports that support interrupt nesting have the concept of a maximum\r
1560         system call (or maximum API call) interrupt priority.  Interrupts that are\r
1561         above the maximum system call priority are kept permanently enabled, even\r
1562         when the RTOS kernel is in a critical section, but cannot make any calls to\r
1563         FreeRTOS API functions.  If configASSERT() is defined in FreeRTOSConfig.h\r
1564         then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion\r
1565         failure if a FreeRTOS API function is called from an interrupt that has been\r
1566         assigned a priority above the configured maximum system call priority.\r
1567         Only FreeRTOS functions that end in FromISR can be called from interrupts\r
1568         that have been assigned a priority at or (logically) below the maximum\r
1569         system call     interrupt priority.  FreeRTOS maintains a separate interrupt\r
1570         safe API to ensure interrupt entry is as fast and as simple as possible.\r
1571         More information (albeit Cortex-M specific) is provided on the following\r
1572         link: http://www.freertos.org/RTOS-Cortex-M3-M4.html */\r
1573         portASSERT_IF_INTERRUPT_PRIORITY_INVALID();\r
1574 \r
1575         uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();\r
1576         {\r
1577                 /* Cannot block in an ISR, so check there is data available. */\r
1578                 if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
1579                 {\r
1580                         traceQUEUE_RECEIVE_FROM_ISR( pxQueue );\r
1581 \r
1582                         prvCopyDataFromQueue( pxQueue, pvBuffer );\r
1583                         --( pxQueue->uxMessagesWaiting );\r
1584 \r
1585                         /* If the queue is locked the event list will not be modified.\r
1586                         Instead update the lock count so the task that unlocks the queue\r
1587                         will know that an ISR has removed data while the queue was\r
1588                         locked. */\r
1589                         if( pxQueue->xRxLock == queueUNLOCKED )\r
1590                         {\r
1591                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
1592                                 {\r
1593                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) != pdFALSE )\r
1594                                         {\r
1595                                                 /* The task waiting has a higher priority than us so\r
1596                                                 force a context switch. */\r
1597                                                 if( pxHigherPriorityTaskWoken != NULL )\r
1598                                                 {\r
1599                                                         *pxHigherPriorityTaskWoken = pdTRUE;\r
1600                                                 }\r
1601                                                 else\r
1602                                                 {\r
1603                                                         mtCOVERAGE_TEST_MARKER();\r
1604                                                 }\r
1605                                         }\r
1606                                         else\r
1607                                         {\r
1608                                                 mtCOVERAGE_TEST_MARKER();\r
1609                                         }\r
1610                                 }\r
1611                                 else\r
1612                                 {\r
1613                                         mtCOVERAGE_TEST_MARKER();\r
1614                                 }\r
1615                         }\r
1616                         else\r
1617                         {\r
1618                                 /* Increment the lock count so the task that unlocks the queue\r
1619                                 knows that data was removed while it was locked. */\r
1620                                 ++( pxQueue->xRxLock );\r
1621                         }\r
1622 \r
1623                         xReturn = pdPASS;\r
1624                 }\r
1625                 else\r
1626                 {\r
1627                         xReturn = pdFAIL;\r
1628                         traceQUEUE_RECEIVE_FROM_ISR_FAILED( pxQueue );\r
1629                 }\r
1630         }\r
1631         portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );\r
1632 \r
1633         return xReturn;\r
1634 }\r
1635 /*-----------------------------------------------------------*/\r
1636 \r
1637 BaseType_t xQueuePeekFromISR( QueueHandle_t xQueue,  void * const pvBuffer )\r
1638 {\r
1639 BaseType_t xReturn;\r
1640 UBaseType_t uxSavedInterruptStatus;\r
1641 int8_t *pcOriginalReadPosition;\r
1642 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1643 \r
1644         configASSERT( pxQueue );\r
1645         configASSERT( !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
1646         configASSERT( pxQueue->uxItemSize != 0 ); /* Can't peek a semaphore. */\r
1647 \r
1648         /* RTOS ports that support interrupt nesting have the concept of a maximum\r
1649         system call (or maximum API call) interrupt priority.  Interrupts that are\r
1650         above the maximum system call priority are kept permanently enabled, even\r
1651         when the RTOS kernel is in a critical section, but cannot make any calls to\r
1652         FreeRTOS API functions.  If configASSERT() is defined in FreeRTOSConfig.h\r
1653         then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion\r
1654         failure if a FreeRTOS API function is called from an interrupt that has been\r
1655         assigned a priority above the configured maximum system call priority.\r
1656         Only FreeRTOS functions that end in FromISR can be called from interrupts\r
1657         that have been assigned a priority at or (logically) below the maximum\r
1658         system call     interrupt priority.  FreeRTOS maintains a separate interrupt\r
1659         safe API to ensure interrupt entry is as fast and as simple as possible.\r
1660         More information (albeit Cortex-M specific) is provided on the following\r
1661         link: http://www.freertos.org/RTOS-Cortex-M3-M4.html */\r
1662         portASSERT_IF_INTERRUPT_PRIORITY_INVALID();\r
1663 \r
1664         uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();\r
1665         {\r
1666                 /* Cannot block in an ISR, so check there is data available. */\r
1667                 if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
1668                 {\r
1669                         traceQUEUE_PEEK_FROM_ISR( pxQueue );\r
1670 \r
1671                         /* Remember the read position so it can be reset as nothing is\r
1672                         actually being removed from the queue. */\r
1673                         pcOriginalReadPosition = pxQueue->u.pcReadFrom;\r
1674                         prvCopyDataFromQueue( pxQueue, pvBuffer );\r
1675                         pxQueue->u.pcReadFrom = pcOriginalReadPosition;\r
1676 \r
1677                         xReturn = pdPASS;\r
1678                 }\r
1679                 else\r
1680                 {\r
1681                         xReturn = pdFAIL;\r
1682                         traceQUEUE_PEEK_FROM_ISR_FAILED( pxQueue );\r
1683                 }\r
1684         }\r
1685         portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );\r
1686 \r
1687         return xReturn;\r
1688 }\r
1689 /*-----------------------------------------------------------*/\r
1690 \r
1691 UBaseType_t uxQueueMessagesWaiting( const QueueHandle_t xQueue )\r
1692 {\r
1693 UBaseType_t uxReturn;\r
1694 \r
1695         configASSERT( xQueue );\r
1696 \r
1697         taskENTER_CRITICAL();\r
1698         {\r
1699                 uxReturn = ( ( Queue_t * ) xQueue )->uxMessagesWaiting;\r
1700         }\r
1701         taskEXIT_CRITICAL();\r
1702 \r
1703         return uxReturn;\r
1704 } /*lint !e818 Pointer cannot be declared const as xQueue is a typedef not pointer. */\r
1705 /*-----------------------------------------------------------*/\r
1706 \r
1707 UBaseType_t uxQueueSpacesAvailable( const QueueHandle_t xQueue )\r
1708 {\r
1709 UBaseType_t uxReturn;\r
1710 Queue_t *pxQueue;\r
1711 \r
1712         pxQueue = ( Queue_t * ) xQueue;\r
1713         configASSERT( pxQueue );\r
1714 \r
1715         taskENTER_CRITICAL();\r
1716         {\r
1717                 uxReturn = pxQueue->uxLength - pxQueue->uxMessagesWaiting;\r
1718         }\r
1719         taskEXIT_CRITICAL();\r
1720 \r
1721         return uxReturn;\r
1722 } /*lint !e818 Pointer cannot be declared const as xQueue is a typedef not pointer. */\r
1723 /*-----------------------------------------------------------*/\r
1724 \r
1725 UBaseType_t uxQueueMessagesWaitingFromISR( const QueueHandle_t xQueue )\r
1726 {\r
1727 UBaseType_t uxReturn;\r
1728 \r
1729         configASSERT( xQueue );\r
1730 \r
1731         uxReturn = ( ( Queue_t * ) xQueue )->uxMessagesWaiting;\r
1732 \r
1733         return uxReturn;\r
1734 } /*lint !e818 Pointer cannot be declared const as xQueue is a typedef not pointer. */\r
1735 /*-----------------------------------------------------------*/\r
1736 \r
1737 void vQueueDelete( QueueHandle_t xQueue )\r
1738 {\r
1739 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1740 \r
1741         configASSERT( pxQueue );\r
1742 \r
1743         traceQUEUE_DELETE( pxQueue );\r
1744         #if ( configQUEUE_REGISTRY_SIZE > 0 )\r
1745         {\r
1746                 vQueueUnregisterQueue( pxQueue );\r
1747         }\r
1748         #endif\r
1749         vPortFree( pxQueue );\r
1750 }\r
1751 /*-----------------------------------------------------------*/\r
1752 \r
1753 #if ( configUSE_TRACE_FACILITY == 1 )\r
1754 \r
1755         UBaseType_t uxQueueGetQueueNumber( QueueHandle_t xQueue )\r
1756         {\r
1757                 return ( ( Queue_t * ) xQueue )->uxQueueNumber;\r
1758         }\r
1759 \r
1760 #endif /* configUSE_TRACE_FACILITY */\r
1761 /*-----------------------------------------------------------*/\r
1762 \r
1763 #if ( configUSE_TRACE_FACILITY == 1 )\r
1764 \r
1765         void vQueueSetQueueNumber( QueueHandle_t xQueue, UBaseType_t uxQueueNumber )\r
1766         {\r
1767                 ( ( Queue_t * ) xQueue )->uxQueueNumber = uxQueueNumber;\r
1768         }\r
1769 \r
1770 #endif /* configUSE_TRACE_FACILITY */\r
1771 /*-----------------------------------------------------------*/\r
1772 \r
1773 #if ( configUSE_TRACE_FACILITY == 1 )\r
1774 \r
1775         uint8_t ucQueueGetQueueType( QueueHandle_t xQueue )\r
1776         {\r
1777                 return ( ( Queue_t * ) xQueue )->ucQueueType;\r
1778         }\r
1779 \r
1780 #endif /* configUSE_TRACE_FACILITY */\r
1781 /*-----------------------------------------------------------*/\r
1782 \r
1783 static BaseType_t prvCopyDataToQueue( Queue_t * const pxQueue, const void *pvItemToQueue, const BaseType_t xPosition )\r
1784 {\r
1785 BaseType_t xReturn = pdFALSE;\r
1786 \r
1787         if( pxQueue->uxItemSize == ( UBaseType_t ) 0 )\r
1788         {\r
1789                 #if ( configUSE_MUTEXES == 1 )\r
1790                 {\r
1791                         if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
1792                         {\r
1793                                 /* The mutex is no longer being held. */\r
1794                                 xReturn = xTaskPriorityDisinherit( ( void * ) pxQueue->pxMutexHolder );\r
1795                                 pxQueue->pxMutexHolder = NULL;\r
1796                         }\r
1797                         else\r
1798                         {\r
1799                                 mtCOVERAGE_TEST_MARKER();\r
1800                         }\r
1801                 }\r
1802                 #endif /* configUSE_MUTEXES */\r
1803         }\r
1804         else if( xPosition == queueSEND_TO_BACK )\r
1805         {\r
1806                 ( void ) memcpy( ( void * ) pxQueue->pcWriteTo, pvItemToQueue, ( size_t ) pxQueue->uxItemSize ); /*lint !e961 !e418 MISRA exception as the casts are only redundant for some ports, plus previous logic ensures a null pointer can only be passed to memcpy() if the copy size is 0. */\r
1807                 pxQueue->pcWriteTo += pxQueue->uxItemSize;\r
1808                 if( pxQueue->pcWriteTo >= pxQueue->pcTail ) /*lint !e946 MISRA exception justified as comparison of pointers is the cleanest solution. */\r
1809                 {\r
1810                         pxQueue->pcWriteTo = pxQueue->pcHead;\r
1811                 }\r
1812                 else\r
1813                 {\r
1814                         mtCOVERAGE_TEST_MARKER();\r
1815                 }\r
1816         }\r
1817         else\r
1818         {\r
1819                 ( void ) memcpy( ( void * ) pxQueue->u.pcReadFrom, pvItemToQueue, ( size_t ) pxQueue->uxItemSize ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */\r
1820                 pxQueue->u.pcReadFrom -= pxQueue->uxItemSize;\r
1821                 if( pxQueue->u.pcReadFrom < pxQueue->pcHead ) /*lint !e946 MISRA exception justified as comparison of pointers is the cleanest solution. */\r
1822                 {\r
1823                         pxQueue->u.pcReadFrom = ( pxQueue->pcTail - pxQueue->uxItemSize );\r
1824                 }\r
1825                 else\r
1826                 {\r
1827                         mtCOVERAGE_TEST_MARKER();\r
1828                 }\r
1829 \r
1830                 if( xPosition == queueOVERWRITE )\r
1831                 {\r
1832                         if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
1833                         {\r
1834                                 /* An item is not being added but overwritten, so subtract\r
1835                                 one from the recorded number of items in the queue so when\r
1836                                 one is added again below the number of recorded items remains\r
1837                                 correct. */\r
1838                                 --( pxQueue->uxMessagesWaiting );\r
1839                         }\r
1840                         else\r
1841                         {\r
1842                                 mtCOVERAGE_TEST_MARKER();\r
1843                         }\r
1844                 }\r
1845                 else\r
1846                 {\r
1847                         mtCOVERAGE_TEST_MARKER();\r
1848                 }\r
1849         }\r
1850 \r
1851         ++( pxQueue->uxMessagesWaiting );\r
1852 \r
1853         return xReturn;\r
1854 }\r
1855 /*-----------------------------------------------------------*/\r
1856 \r
1857 static void prvCopyDataFromQueue( Queue_t * const pxQueue, void * const pvBuffer )\r
1858 {\r
1859         if( pxQueue->uxItemSize != ( UBaseType_t ) 0 )\r
1860         {\r
1861                 pxQueue->u.pcReadFrom += pxQueue->uxItemSize;\r
1862                 if( pxQueue->u.pcReadFrom >= pxQueue->pcTail ) /*lint !e946 MISRA exception justified as use of the relational operator is the cleanest solutions. */\r
1863                 {\r
1864                         pxQueue->u.pcReadFrom = pxQueue->pcHead;\r
1865                 }\r
1866                 else\r
1867                 {\r
1868                         mtCOVERAGE_TEST_MARKER();\r
1869                 }\r
1870                 ( void ) memcpy( ( void * ) pvBuffer, ( void * ) pxQueue->u.pcReadFrom, ( size_t ) pxQueue->uxItemSize ); /*lint !e961 !e418 MISRA exception as the casts are only redundant for some ports.  Also previous logic ensures a null pointer can only be passed to memcpy() when the count is 0. */\r
1871         }\r
1872 }\r
1873 /*-----------------------------------------------------------*/\r
1874 \r
1875 static void prvUnlockQueue( Queue_t * const pxQueue )\r
1876 {\r
1877         /* THIS FUNCTION MUST BE CALLED WITH THE SCHEDULER SUSPENDED. */\r
1878 \r
1879         /* The lock counts contains the number of extra data items placed or\r
1880         removed from the queue while the queue was locked.  When a queue is\r
1881         locked items can be added or removed, but the event lists cannot be\r
1882         updated. */\r
1883         taskENTER_CRITICAL();\r
1884         {\r
1885                 /* See if data was added to the queue while it was locked. */\r
1886                 while( pxQueue->xTxLock > queueLOCKED_UNMODIFIED )\r
1887                 {\r
1888                         /* Data was posted while the queue was locked.  Are any tasks\r
1889                         blocked waiting for data to become available? */\r
1890                         #if ( configUSE_QUEUE_SETS == 1 )\r
1891                         {\r
1892                                 if( pxQueue->pxQueueSetContainer != NULL )\r
1893                                 {\r
1894                                         if( prvNotifyQueueSetContainer( pxQueue, queueSEND_TO_BACK ) == pdTRUE )\r
1895                                         {\r
1896                                                 /* The queue is a member of a queue set, and posting to\r
1897                                                 the queue set caused a higher priority task to unblock.\r
1898                                                 A context switch is required. */\r
1899                                                 vTaskMissedYield();\r
1900                                         }\r
1901                                         else\r
1902                                         {\r
1903                                                 mtCOVERAGE_TEST_MARKER();\r
1904                                         }\r
1905                                 }\r
1906                                 else\r
1907                                 {\r
1908                                         /* Tasks that are removed from the event list will get added to\r
1909                                         the pending ready list as the scheduler is still suspended. */\r
1910                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1911                                         {\r
1912                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1913                                                 {\r
1914                                                         /* The task waiting has a higher priority so record that a\r
1915                                                         context switch is required. */\r
1916                                                         vTaskMissedYield();\r
1917                                                 }\r
1918                                                 else\r
1919                                                 {\r
1920                                                         mtCOVERAGE_TEST_MARKER();\r
1921                                                 }\r
1922                                         }\r
1923                                         else\r
1924                                         {\r
1925                                                 break;\r
1926                                         }\r
1927                                 }\r
1928                         }\r
1929                         #else /* configUSE_QUEUE_SETS */\r
1930                         {\r
1931                                 /* Tasks that are removed from the event list will get added to\r
1932                                 the pending ready list as the scheduler is still suspended. */\r
1933                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1934                                 {\r
1935                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1936                                         {\r
1937                                                 /* The task waiting has a higher priority so record that a\r
1938                                                 context switch is required. */\r
1939                                                 vTaskMissedYield();\r
1940                                         }\r
1941                                         else\r
1942                                         {\r
1943                                                 mtCOVERAGE_TEST_MARKER();\r
1944                                         }\r
1945                                 }\r
1946                                 else\r
1947                                 {\r
1948                                         break;\r
1949                                 }\r
1950                         }\r
1951                         #endif /* configUSE_QUEUE_SETS */\r
1952 \r
1953                         --( pxQueue->xTxLock );\r
1954                 }\r
1955 \r
1956                 pxQueue->xTxLock = queueUNLOCKED;\r
1957         }\r
1958         taskEXIT_CRITICAL();\r
1959 \r
1960         /* Do the same for the Rx lock. */\r
1961         taskENTER_CRITICAL();\r
1962         {\r
1963                 while( pxQueue->xRxLock > queueLOCKED_UNMODIFIED )\r
1964                 {\r
1965                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
1966                         {\r
1967                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) != pdFALSE )\r
1968                                 {\r
1969                                         vTaskMissedYield();\r
1970                                 }\r
1971                                 else\r
1972                                 {\r
1973                                         mtCOVERAGE_TEST_MARKER();\r
1974                                 }\r
1975 \r
1976                                 --( pxQueue->xRxLock );\r
1977                         }\r
1978                         else\r
1979                         {\r
1980                                 break;\r
1981                         }\r
1982                 }\r
1983 \r
1984                 pxQueue->xRxLock = queueUNLOCKED;\r
1985         }\r
1986         taskEXIT_CRITICAL();\r
1987 }\r
1988 /*-----------------------------------------------------------*/\r
1989 \r
1990 static BaseType_t prvIsQueueEmpty( const Queue_t *pxQueue )\r
1991 {\r
1992 BaseType_t xReturn;\r
1993 \r
1994         taskENTER_CRITICAL();\r
1995         {\r
1996                 if( pxQueue->uxMessagesWaiting == ( UBaseType_t )  0 )\r
1997                 {\r
1998                         xReturn = pdTRUE;\r
1999                 }\r
2000                 else\r
2001                 {\r
2002                         xReturn = pdFALSE;\r
2003                 }\r
2004         }\r
2005         taskEXIT_CRITICAL();\r
2006 \r
2007         return xReturn;\r
2008 }\r
2009 /*-----------------------------------------------------------*/\r
2010 \r
2011 BaseType_t xQueueIsQueueEmptyFromISR( const QueueHandle_t xQueue )\r
2012 {\r
2013 BaseType_t xReturn;\r
2014 \r
2015         configASSERT( xQueue );\r
2016         if( ( ( Queue_t * ) xQueue )->uxMessagesWaiting == ( UBaseType_t ) 0 )\r
2017         {\r
2018                 xReturn = pdTRUE;\r
2019         }\r
2020         else\r
2021         {\r
2022                 xReturn = pdFALSE;\r
2023         }\r
2024 \r
2025         return xReturn;\r
2026 } /*lint !e818 xQueue could not be pointer to const because it is a typedef. */\r
2027 /*-----------------------------------------------------------*/\r
2028 \r
2029 static BaseType_t prvIsQueueFull( const Queue_t *pxQueue )\r
2030 {\r
2031 BaseType_t xReturn;\r
2032 \r
2033         taskENTER_CRITICAL();\r
2034         {\r
2035                 if( pxQueue->uxMessagesWaiting == pxQueue->uxLength )\r
2036                 {\r
2037                         xReturn = pdTRUE;\r
2038                 }\r
2039                 else\r
2040                 {\r
2041                         xReturn = pdFALSE;\r
2042                 }\r
2043         }\r
2044         taskEXIT_CRITICAL();\r
2045 \r
2046         return xReturn;\r
2047 }\r
2048 /*-----------------------------------------------------------*/\r
2049 \r
2050 BaseType_t xQueueIsQueueFullFromISR( const QueueHandle_t xQueue )\r
2051 {\r
2052 BaseType_t xReturn;\r
2053 \r
2054         configASSERT( xQueue );\r
2055         if( ( ( Queue_t * ) xQueue )->uxMessagesWaiting == ( ( Queue_t * ) xQueue )->uxLength )\r
2056         {\r
2057                 xReturn = pdTRUE;\r
2058         }\r
2059         else\r
2060         {\r
2061                 xReturn = pdFALSE;\r
2062         }\r
2063 \r
2064         return xReturn;\r
2065 } /*lint !e818 xQueue could not be pointer to const because it is a typedef. */\r
2066 /*-----------------------------------------------------------*/\r
2067 \r
2068 #if ( configUSE_CO_ROUTINES == 1 )\r
2069 \r
2070         BaseType_t xQueueCRSend( QueueHandle_t xQueue, const void *pvItemToQueue, TickType_t xTicksToWait )\r
2071         {\r
2072         BaseType_t xReturn;\r
2073         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
2074 \r
2075                 /* If the queue is already full we may have to block.  A critical section\r
2076                 is required to prevent an interrupt removing something from the queue\r
2077                 between the check to see if the queue is full and blocking on the queue. */\r
2078                 portDISABLE_INTERRUPTS();\r
2079                 {\r
2080                         if( prvIsQueueFull( pxQueue ) != pdFALSE )\r
2081                         {\r
2082                                 /* The queue is full - do we want to block or just leave without\r
2083                                 posting? */\r
2084                                 if( xTicksToWait > ( TickType_t ) 0 )\r
2085                                 {\r
2086                                         /* As this is called from a coroutine we cannot block directly, but\r
2087                                         return indicating that we need to block. */\r
2088                                         vCoRoutineAddToDelayedList( xTicksToWait, &( pxQueue->xTasksWaitingToSend ) );\r
2089                                         portENABLE_INTERRUPTS();\r
2090                                         return errQUEUE_BLOCKED;\r
2091                                 }\r
2092                                 else\r
2093                                 {\r
2094                                         portENABLE_INTERRUPTS();\r
2095                                         return errQUEUE_FULL;\r
2096                                 }\r
2097                         }\r
2098                 }\r
2099                 portENABLE_INTERRUPTS();\r
2100 \r
2101                 portDISABLE_INTERRUPTS();\r
2102                 {\r
2103                         if( pxQueue->uxMessagesWaiting < pxQueue->uxLength )\r
2104                         {\r
2105                                 /* There is room in the queue, copy the data into the queue. */\r
2106                                 prvCopyDataToQueue( pxQueue, pvItemToQueue, queueSEND_TO_BACK );\r
2107                                 xReturn = pdPASS;\r
2108 \r
2109                                 /* Were any co-routines waiting for data to become available? */\r
2110                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
2111                                 {\r
2112                                         /* In this instance the co-routine could be placed directly\r
2113                                         into the ready list as we are within a critical section.\r
2114                                         Instead the same pending ready list mechanism is used as if\r
2115                                         the event were caused from within an interrupt. */\r
2116                                         if( xCoRoutineRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
2117                                         {\r
2118                                                 /* The co-routine waiting has a higher priority so record\r
2119                                                 that a yield might be appropriate. */\r
2120                                                 xReturn = errQUEUE_YIELD;\r
2121                                         }\r
2122                                         else\r
2123                                         {\r
2124                                                 mtCOVERAGE_TEST_MARKER();\r
2125                                         }\r
2126                                 }\r
2127                                 else\r
2128                                 {\r
2129                                         mtCOVERAGE_TEST_MARKER();\r
2130                                 }\r
2131                         }\r
2132                         else\r
2133                         {\r
2134                                 xReturn = errQUEUE_FULL;\r
2135                         }\r
2136                 }\r
2137                 portENABLE_INTERRUPTS();\r
2138 \r
2139                 return xReturn;\r
2140         }\r
2141 \r
2142 #endif /* configUSE_CO_ROUTINES */\r
2143 /*-----------------------------------------------------------*/\r
2144 \r
2145 #if ( configUSE_CO_ROUTINES == 1 )\r
2146 \r
2147         BaseType_t xQueueCRReceive( QueueHandle_t xQueue, void *pvBuffer, TickType_t xTicksToWait )\r
2148         {\r
2149         BaseType_t xReturn;\r
2150         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
2151 \r
2152                 /* If the queue is already empty we may have to block.  A critical section\r
2153                 is required to prevent an interrupt adding something to the queue\r
2154                 between the check to see if the queue is empty and blocking on the queue. */\r
2155                 portDISABLE_INTERRUPTS();\r
2156                 {\r
2157                         if( pxQueue->uxMessagesWaiting == ( UBaseType_t ) 0 )\r
2158                         {\r
2159                                 /* There are no messages in the queue, do we want to block or just\r
2160                                 leave with nothing? */\r
2161                                 if( xTicksToWait > ( TickType_t ) 0 )\r
2162                                 {\r
2163                                         /* As this is a co-routine we cannot block directly, but return\r
2164                                         indicating that we need to block. */\r
2165                                         vCoRoutineAddToDelayedList( xTicksToWait, &( pxQueue->xTasksWaitingToReceive ) );\r
2166                                         portENABLE_INTERRUPTS();\r
2167                                         return errQUEUE_BLOCKED;\r
2168                                 }\r
2169                                 else\r
2170                                 {\r
2171                                         portENABLE_INTERRUPTS();\r
2172                                         return errQUEUE_FULL;\r
2173                                 }\r
2174                         }\r
2175                         else\r
2176                         {\r
2177                                 mtCOVERAGE_TEST_MARKER();\r
2178                         }\r
2179                 }\r
2180                 portENABLE_INTERRUPTS();\r
2181 \r
2182                 portDISABLE_INTERRUPTS();\r
2183                 {\r
2184                         if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
2185                         {\r
2186                                 /* Data is available from the queue. */\r
2187                                 pxQueue->u.pcReadFrom += pxQueue->uxItemSize;\r
2188                                 if( pxQueue->u.pcReadFrom >= pxQueue->pcTail )\r
2189                                 {\r
2190                                         pxQueue->u.pcReadFrom = pxQueue->pcHead;\r
2191                                 }\r
2192                                 else\r
2193                                 {\r
2194                                         mtCOVERAGE_TEST_MARKER();\r
2195                                 }\r
2196                                 --( pxQueue->uxMessagesWaiting );\r
2197                                 ( void ) memcpy( ( void * ) pvBuffer, ( void * ) pxQueue->u.pcReadFrom, ( unsigned ) pxQueue->uxItemSize );\r
2198 \r
2199                                 xReturn = pdPASS;\r
2200 \r
2201                                 /* Were any co-routines waiting for space to become available? */\r
2202                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
2203                                 {\r
2204                                         /* In this instance the co-routine could be placed directly\r
2205                                         into the ready list as we are within a critical section.\r
2206                                         Instead the same pending ready list mechanism is used as if\r
2207                                         the event were caused from within an interrupt. */\r
2208                                         if( xCoRoutineRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) != pdFALSE )\r
2209                                         {\r
2210                                                 xReturn = errQUEUE_YIELD;\r
2211                                         }\r
2212                                         else\r
2213                                         {\r
2214                                                 mtCOVERAGE_TEST_MARKER();\r
2215                                         }\r
2216                                 }\r
2217                                 else\r
2218                                 {\r
2219                                         mtCOVERAGE_TEST_MARKER();\r
2220                                 }\r
2221                         }\r
2222                         else\r
2223                         {\r
2224                                 xReturn = pdFAIL;\r
2225                         }\r
2226                 }\r
2227                 portENABLE_INTERRUPTS();\r
2228 \r
2229                 return xReturn;\r
2230         }\r
2231 \r
2232 #endif /* configUSE_CO_ROUTINES */\r
2233 /*-----------------------------------------------------------*/\r
2234 \r
2235 #if ( configUSE_CO_ROUTINES == 1 )\r
2236 \r
2237         BaseType_t xQueueCRSendFromISR( QueueHandle_t xQueue, const void *pvItemToQueue, BaseType_t xCoRoutinePreviouslyWoken )\r
2238         {\r
2239         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
2240 \r
2241                 /* Cannot block within an ISR so if there is no space on the queue then\r
2242                 exit without doing anything. */\r
2243                 if( pxQueue->uxMessagesWaiting < pxQueue->uxLength )\r
2244                 {\r
2245                         prvCopyDataToQueue( pxQueue, pvItemToQueue, queueSEND_TO_BACK );\r
2246 \r
2247                         /* We only want to wake one co-routine per ISR, so check that a\r
2248                         co-routine has not already been woken. */\r
2249                         if( xCoRoutinePreviouslyWoken == pdFALSE )\r
2250                         {\r
2251                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
2252                                 {\r
2253                                         if( xCoRoutineRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
2254                                         {\r
2255                                                 return pdTRUE;\r
2256                                         }\r
2257                                         else\r
2258                                         {\r
2259                                                 mtCOVERAGE_TEST_MARKER();\r
2260                                         }\r
2261                                 }\r
2262                                 else\r
2263                                 {\r
2264                                         mtCOVERAGE_TEST_MARKER();\r
2265                                 }\r
2266                         }\r
2267                         else\r
2268                         {\r
2269                                 mtCOVERAGE_TEST_MARKER();\r
2270                         }\r
2271                 }\r
2272                 else\r
2273                 {\r
2274                         mtCOVERAGE_TEST_MARKER();\r
2275                 }\r
2276 \r
2277                 return xCoRoutinePreviouslyWoken;\r
2278         }\r
2279 \r
2280 #endif /* configUSE_CO_ROUTINES */\r
2281 /*-----------------------------------------------------------*/\r
2282 \r
2283 #if ( configUSE_CO_ROUTINES == 1 )\r
2284 \r
2285         BaseType_t xQueueCRReceiveFromISR( QueueHandle_t xQueue, void *pvBuffer, BaseType_t *pxCoRoutineWoken )\r
2286         {\r
2287         BaseType_t xReturn;\r
2288         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
2289 \r
2290                 /* We cannot block from an ISR, so check there is data available. If\r
2291                 not then just leave without doing anything. */\r
2292                 if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
2293                 {\r
2294                         /* Copy the data from the queue. */\r
2295                         pxQueue->u.pcReadFrom += pxQueue->uxItemSize;\r
2296                         if( pxQueue->u.pcReadFrom >= pxQueue->pcTail )\r
2297                         {\r
2298                                 pxQueue->u.pcReadFrom = pxQueue->pcHead;\r
2299                         }\r
2300                         else\r
2301                         {\r
2302                                 mtCOVERAGE_TEST_MARKER();\r
2303                         }\r
2304                         --( pxQueue->uxMessagesWaiting );\r
2305                         ( void ) memcpy( ( void * ) pvBuffer, ( void * ) pxQueue->u.pcReadFrom, ( unsigned ) pxQueue->uxItemSize );\r
2306 \r
2307                         if( ( *pxCoRoutineWoken ) == pdFALSE )\r
2308                         {\r
2309                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
2310                                 {\r
2311                                         if( xCoRoutineRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) != pdFALSE )\r
2312                                         {\r
2313                                                 *pxCoRoutineWoken = pdTRUE;\r
2314                                         }\r
2315                                         else\r
2316                                         {\r
2317                                                 mtCOVERAGE_TEST_MARKER();\r
2318                                         }\r
2319                                 }\r
2320                                 else\r
2321                                 {\r
2322                                         mtCOVERAGE_TEST_MARKER();\r
2323                                 }\r
2324                         }\r
2325                         else\r
2326                         {\r
2327                                 mtCOVERAGE_TEST_MARKER();\r
2328                         }\r
2329 \r
2330                         xReturn = pdPASS;\r
2331                 }\r
2332                 else\r
2333                 {\r
2334                         xReturn = pdFAIL;\r
2335                 }\r
2336 \r
2337                 return xReturn;\r
2338         }\r
2339 \r
2340 #endif /* configUSE_CO_ROUTINES */\r
2341 /*-----------------------------------------------------------*/\r
2342 \r
2343 #if ( configQUEUE_REGISTRY_SIZE > 0 )\r
2344 \r
2345         void vQueueAddToRegistry( QueueHandle_t xQueue, const char *pcQueueName ) /*lint !e971 Unqualified char types are allowed for strings and single characters only. */\r
2346         {\r
2347         UBaseType_t ux;\r
2348 \r
2349                 /* See if there is an empty space in the registry.  A NULL name denotes\r
2350                 a free slot. */\r
2351                 for( ux = ( UBaseType_t ) 0U; ux < ( UBaseType_t ) configQUEUE_REGISTRY_SIZE; ux++ )\r
2352                 {\r
2353                         if( xQueueRegistry[ ux ].pcQueueName == NULL )\r
2354                         {\r
2355                                 /* Store the information on this queue. */\r
2356                                 xQueueRegistry[ ux ].pcQueueName = pcQueueName;\r
2357                                 xQueueRegistry[ ux ].xHandle = xQueue;\r
2358 \r
2359                                 traceQUEUE_REGISTRY_ADD( xQueue, pcQueueName );\r
2360                                 break;\r
2361                         }\r
2362                         else\r
2363                         {\r
2364                                 mtCOVERAGE_TEST_MARKER();\r
2365                         }\r
2366                 }\r
2367         }\r
2368 \r
2369 #endif /* configQUEUE_REGISTRY_SIZE */\r
2370 /*-----------------------------------------------------------*/\r
2371 \r
2372 #if ( configQUEUE_REGISTRY_SIZE > 0 )\r
2373 \r
2374         void vQueueUnregisterQueue( QueueHandle_t xQueue )\r
2375         {\r
2376         UBaseType_t ux;\r
2377 \r
2378                 /* See if the handle of the queue being unregistered in actually in the\r
2379                 registry. */\r
2380                 for( ux = ( UBaseType_t ) 0U; ux < ( UBaseType_t ) configQUEUE_REGISTRY_SIZE; ux++ )\r
2381                 {\r
2382                         if( xQueueRegistry[ ux ].xHandle == xQueue )\r
2383                         {\r
2384                                 /* Set the name to NULL to show that this slot if free again. */\r
2385                                 xQueueRegistry[ ux ].pcQueueName = NULL;\r
2386                                 break;\r
2387                         }\r
2388                         else\r
2389                         {\r
2390                                 mtCOVERAGE_TEST_MARKER();\r
2391                         }\r
2392                 }\r
2393 \r
2394         } /*lint !e818 xQueue could not be pointer to const because it is a typedef. */\r
2395 \r
2396 #endif /* configQUEUE_REGISTRY_SIZE */\r
2397 /*-----------------------------------------------------------*/\r
2398 \r
2399 #if ( configUSE_TIMERS == 1 )\r
2400 \r
2401         void vQueueWaitForMessageRestricted( QueueHandle_t xQueue, TickType_t xTicksToWait )\r
2402         {\r
2403         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
2404 \r
2405                 /* This function should not be called by application code hence the\r
2406                 'Restricted' in its name.  It is not part of the public API.  It is\r
2407                 designed for use by kernel code, and has special calling requirements.\r
2408                 It can result in vListInsert() being called on a list that can only\r
2409                 possibly ever have one item in it, so the list will be fast, but even\r
2410                 so it should be called with the scheduler locked and not from a critical\r
2411                 section. */\r
2412 \r
2413                 /* Only do anything if there are no messages in the queue.  This function\r
2414                 will not actually cause the task to block, just place it on a blocked\r
2415                 list.  It will not block until the scheduler is unlocked - at which\r
2416                 time a yield will be performed.  If an item is added to the queue while\r
2417                 the queue is locked, and the calling task blocks on the queue, then the\r
2418                 calling task will be immediately unblocked when the queue is unlocked. */\r
2419                 prvLockQueue( pxQueue );\r
2420                 if( pxQueue->uxMessagesWaiting == ( UBaseType_t ) 0U )\r
2421                 {\r
2422                         /* There is nothing in the queue, block for the specified period. */\r
2423                         vTaskPlaceOnEventListRestricted( &( pxQueue->xTasksWaitingToReceive ), xTicksToWait );\r
2424                 }\r
2425                 else\r
2426                 {\r
2427                         mtCOVERAGE_TEST_MARKER();\r
2428                 }\r
2429                 prvUnlockQueue( pxQueue );\r
2430         }\r
2431 \r
2432 #endif /* configUSE_TIMERS */\r
2433 /*-----------------------------------------------------------*/\r
2434 \r
2435 #if ( configUSE_QUEUE_SETS == 1 )\r
2436 \r
2437         QueueSetHandle_t xQueueCreateSet( const UBaseType_t uxEventQueueLength )\r
2438         {\r
2439         QueueSetHandle_t pxQueue;\r
2440 \r
2441                 pxQueue = xQueueGenericCreate( uxEventQueueLength, sizeof( Queue_t * ), queueQUEUE_TYPE_SET );\r
2442 \r
2443                 return pxQueue;\r
2444         }\r
2445 \r
2446 #endif /* configUSE_QUEUE_SETS */\r
2447 /*-----------------------------------------------------------*/\r
2448 \r
2449 #if ( configUSE_QUEUE_SETS == 1 )\r
2450 \r
2451         BaseType_t xQueueAddToSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet )\r
2452         {\r
2453         BaseType_t xReturn;\r
2454 \r
2455                 taskENTER_CRITICAL();\r
2456                 {\r
2457                         if( ( ( Queue_t * ) xQueueOrSemaphore )->pxQueueSetContainer != NULL )\r
2458                         {\r
2459                                 /* Cannot add a queue/semaphore to more than one queue set. */\r
2460                                 xReturn = pdFAIL;\r
2461                         }\r
2462                         else if( ( ( Queue_t * ) xQueueOrSemaphore )->uxMessagesWaiting != ( UBaseType_t ) 0 )\r
2463                         {\r
2464                                 /* Cannot add a queue/semaphore to a queue set if there are already\r
2465                                 items in the queue/semaphore. */\r
2466                                 xReturn = pdFAIL;\r
2467                         }\r
2468                         else\r
2469                         {\r
2470                                 ( ( Queue_t * ) xQueueOrSemaphore )->pxQueueSetContainer = xQueueSet;\r
2471                                 xReturn = pdPASS;\r
2472                         }\r
2473                 }\r
2474                 taskEXIT_CRITICAL();\r
2475 \r
2476                 return xReturn;\r
2477         }\r
2478 \r
2479 #endif /* configUSE_QUEUE_SETS */\r
2480 /*-----------------------------------------------------------*/\r
2481 \r
2482 #if ( configUSE_QUEUE_SETS == 1 )\r
2483 \r
2484         BaseType_t xQueueRemoveFromSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet )\r
2485         {\r
2486         BaseType_t xReturn;\r
2487         Queue_t * const pxQueueOrSemaphore = ( Queue_t * ) xQueueOrSemaphore;\r
2488 \r
2489                 if( pxQueueOrSemaphore->pxQueueSetContainer != xQueueSet )\r
2490                 {\r
2491                         /* The queue was not a member of the set. */\r
2492                         xReturn = pdFAIL;\r
2493                 }\r
2494                 else if( pxQueueOrSemaphore->uxMessagesWaiting != ( UBaseType_t ) 0 )\r
2495                 {\r
2496                         /* It is dangerous to remove a queue from a set when the queue is\r
2497                         not empty because the queue set will still hold pending events for\r
2498                         the queue. */\r
2499                         xReturn = pdFAIL;\r
2500                 }\r
2501                 else\r
2502                 {\r
2503                         taskENTER_CRITICAL();\r
2504                         {\r
2505                                 /* The queue is no longer contained in the set. */\r
2506                                 pxQueueOrSemaphore->pxQueueSetContainer = NULL;\r
2507                         }\r
2508                         taskEXIT_CRITICAL();\r
2509                         xReturn = pdPASS;\r
2510                 }\r
2511 \r
2512                 return xReturn;\r
2513         } /*lint !e818 xQueueSet could not be declared as pointing to const as it is a typedef. */\r
2514 \r
2515 #endif /* configUSE_QUEUE_SETS */\r
2516 /*-----------------------------------------------------------*/\r
2517 \r
2518 #if ( configUSE_QUEUE_SETS == 1 )\r
2519 \r
2520         QueueSetMemberHandle_t xQueueSelectFromSet( QueueSetHandle_t xQueueSet, TickType_t const xTicksToWait )\r
2521         {\r
2522         QueueSetMemberHandle_t xReturn = NULL;\r
2523 \r
2524                 ( void ) xQueueGenericReceive( ( QueueHandle_t ) xQueueSet, &xReturn, xTicksToWait, pdFALSE ); /*lint !e961 Casting from one typedef to another is not redundant. */\r
2525                 return xReturn;\r
2526         }\r
2527 \r
2528 #endif /* configUSE_QUEUE_SETS */\r
2529 /*-----------------------------------------------------------*/\r
2530 \r
2531 #if ( configUSE_QUEUE_SETS == 1 )\r
2532 \r
2533         QueueSetMemberHandle_t xQueueSelectFromSetFromISR( QueueSetHandle_t xQueueSet )\r
2534         {\r
2535         QueueSetMemberHandle_t xReturn = NULL;\r
2536 \r
2537                 ( void ) xQueueReceiveFromISR( ( QueueHandle_t ) xQueueSet, &xReturn, NULL ); /*lint !e961 Casting from one typedef to another is not redundant. */\r
2538                 return xReturn;\r
2539         }\r
2540 \r
2541 #endif /* configUSE_QUEUE_SETS */\r
2542 /*-----------------------------------------------------------*/\r
2543 \r
2544 #if ( configUSE_QUEUE_SETS == 1 )\r
2545 \r
2546         static BaseType_t prvNotifyQueueSetContainer( const Queue_t * const pxQueue, const BaseType_t xCopyPosition )\r
2547         {\r
2548         Queue_t *pxQueueSetContainer = pxQueue->pxQueueSetContainer;\r
2549         BaseType_t xReturn = pdFALSE;\r
2550 \r
2551                 /* This function must be called form a critical section. */\r
2552 \r
2553                 configASSERT( pxQueueSetContainer );\r
2554                 configASSERT( pxQueueSetContainer->uxMessagesWaiting < pxQueueSetContainer->uxLength );\r
2555 \r
2556                 if( pxQueueSetContainer->uxMessagesWaiting < pxQueueSetContainer->uxLength )\r
2557                 {\r
2558                         traceQUEUE_SEND( pxQueueSetContainer );\r
2559                         /* The data copied is the handle of the queue that contains data. */\r
2560                         xReturn = prvCopyDataToQueue( pxQueueSetContainer, &pxQueue, xCopyPosition );\r
2561 \r
2562                         if( listLIST_IS_EMPTY( &( pxQueueSetContainer->xTasksWaitingToReceive ) ) == pdFALSE )\r
2563                         {\r
2564                                 if( xTaskRemoveFromEventList( &( pxQueueSetContainer->xTasksWaitingToReceive ) ) != pdFALSE )\r
2565                                 {\r
2566                                         /* The task waiting has a higher priority */\r
2567                                         xReturn = pdTRUE;\r
2568                                 }\r
2569                                 else\r
2570                                 {\r
2571                                         mtCOVERAGE_TEST_MARKER();\r
2572                                 }\r
2573                         }\r
2574                         else\r
2575                         {\r
2576                                 mtCOVERAGE_TEST_MARKER();\r
2577                         }\r
2578                 }\r
2579                 else\r
2580                 {\r
2581                         mtCOVERAGE_TEST_MARKER();\r
2582                 }\r
2583 \r
2584                 return xReturn;\r
2585         }\r
2586 \r
2587 #endif /* configUSE_QUEUE_SETS */\r
2588 \r
2589 \r
2590 \r
2591 \r
2592 \r
2593 \r
2594 \r
2595 \r
2596 \r
2597 \r
2598 \r
2599 \r