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

   1 /*\r
   2     FreeRTOS V8.1.2 - Copyright (C) 2014 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     ***************************************************************************\r
   8      *                                                                       *\r
   9      *    FreeRTOS provides completely free yet professionally developed,    *\r
  10      *    robust, strictly quality controlled, supported, and cross          *\r
  11      *    platform software that has become a de facto standard.             *\r
  12      *                                                                       *\r
  13      *    Help yourself get started quickly and support the FreeRTOS         *\r
  14      *    project by purchasing a FreeRTOS tutorial book, reference          *\r
  15      *    manual, or both from: http://www.FreeRTOS.org/Documentation        *\r
  16      *                                                                       *\r
  17      *    Thank you!                                                         *\r
  18      *                                                                       *\r
  19     ***************************************************************************\r
  20 \r
  21     This file is part of the FreeRTOS distribution.\r
  22 \r
  23     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  24     the terms of the GNU General Public License (version 2) as published by the\r
  25     Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
  26 \r
  27     >>!   NOTE: The modification to the GPL is included to allow you to     !<<\r
  28     >>!   distribute a combined work that includes FreeRTOS without being   !<<\r
  29     >>!   obliged to provide the source code for proprietary components     !<<\r
  30     >>!   outside of the FreeRTOS kernel.                                   !<<\r
  31 \r
  32     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
  33     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
  34     FOR A PARTICULAR PURPOSE.  Full license text is available from the following\r
  35     link: http://www.freertos.org/a00114.html\r
  36 \r
  37     1 tab == 4 spaces!\r
  38 \r
  39     ***************************************************************************\r
  40      *                                                                       *\r
  41      *    Having a problem?  Start by reading the FAQ "My application does   *\r
  42      *    not run, what could be wrong?"                                     *\r
  43      *                                                                       *\r
  44      *    http://www.FreeRTOS.org/FAQHelp.html                               *\r
  45      *                                                                       *\r
  46     ***************************************************************************\r
  47 \r
  48     http://www.FreeRTOS.org - Documentation, books, training, latest versions,\r
  49     license and Real Time Engineers Ltd. contact details.\r
  50 \r
  51     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
  52     including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
  53     compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
  54 \r
  55     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High\r
  56     Integrity Systems to sell under the OpenRTOS brand.  Low cost OpenRTOS\r
  57     licenses offer ticketed support, indemnification and middleware.\r
  58 \r
  59     http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
  60     engineered and independently SIL3 certified version for use in safety and\r
  61     mission critical applications that require provable dependability.\r
  62 \r
  63     1 tab == 4 spaces!\r
  64 */\r
  65 \r
  66 #include <stdlib.h>\r
  67 #include <string.h>\r
  68 \r
  69 /* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining\r
  70 all the API functions to use the MPU wrappers.  That should only be done when\r
  71 task.h is included from an application file. */\r
  72 #define MPU_WRAPPERS_INCLUDED_FROM_API_FILE\r
  73 \r
  74 #include "FreeRTOS.h"\r
  75 #include "task.h"\r
  76 #include "queue.h"\r
  77 \r
  78 #if ( configUSE_CO_ROUTINES == 1 )\r
  79         #include "croutine.h"\r
  80 #endif\r
  81 \r
  82 /* Lint e961 and e750 are suppressed as a MISRA exception justified because the\r
  83 MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be defined for the\r
  84 header files above, but not in this file, in order to generate the correct\r
  85 privileged Vs unprivileged linkage and placement. */\r
  86 #undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750. */\r
  87 \r
  88 \r
  89 /* Constants used with the xRxLock and xTxLock structure members. */\r
  90 #define queueUNLOCKED                                   ( ( BaseType_t ) -1 )\r
  91 #define queueLOCKED_UNMODIFIED                  ( ( BaseType_t ) 0 )\r
  92 \r
  93 /* When the Queue_t structure is used to represent a base queue its pcHead and\r
  94 pcTail members are used as pointers into the queue storage area.  When the\r
  95 Queue_t structure is used to represent a mutex pcHead and pcTail pointers are\r
  96 not necessary, and the pcHead pointer is set to NULL to indicate that the\r
  97 pcTail pointer actually points to the mutex holder (if any).  Map alternative\r
  98 names to the pcHead and pcTail structure members to ensure the readability of\r
  99 the code is maintained despite this dual use of two structure members.  An\r
 100 alternative implementation would be to use a union, but use of a union is\r
 101 against the coding standard (although an exception to the standard has been\r
 102 permitted where the dual use also significantly changes the type of the\r
 103 structure member). */\r
 104 #define pxMutexHolder                                   pcTail\r
 105 #define uxQueueType                                             pcHead\r
 106 #define queueQUEUE_IS_MUTEX                             NULL\r
 107 \r
 108 /* Semaphores do not actually store or copy data, so have an item size of\r
 109 zero. */\r
 110 #define queueSEMAPHORE_QUEUE_ITEM_LENGTH ( ( UBaseType_t ) 0 )\r
 111 #define queueMUTEX_GIVE_BLOCK_TIME               ( ( TickType_t ) 0U )\r
 112 \r
 113 #if( configUSE_PREEMPTION == 0 )\r
 114         /* If the cooperative scheduler is being used then a yield should not be\r
 115         performed just because a higher priority task has been woken. */\r
 116         #define queueYIELD_IF_USING_PREEMPTION()\r
 117 #else\r
 118         #define queueYIELD_IF_USING_PREEMPTION() portYIELD_WITHIN_API()\r
 119 #endif\r
 120 \r
 121 /*\r
 122  * Definition of the queue used by the scheduler.\r
 123  * Items are queued by copy, not reference.\r
 124  */\r
 125 typedef struct QueueDefinition\r
 126 {\r
 127         int8_t *pcHead;                                 /*< Points to the beginning of the queue storage area. */\r
 128         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
 129         int8_t *pcWriteTo;                              /*< Points to the free next place in the storage area. */\r
 130 \r
 131         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
 132         {\r
 133                 int8_t *pcReadFrom;                     /*< Points to the last place that a queued item was read from when the structure is used as a queue. */\r
 134                 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
 135         } u;\r
 136 \r
 137         List_t xTasksWaitingToSend;             /*< List of tasks that are blocked waiting to post onto this queue.  Stored in priority order. */\r
 138         List_t xTasksWaitingToReceive;  /*< List of tasks that are blocked waiting to read from this queue.  Stored in priority order. */\r
 139 \r
 140         volatile UBaseType_t uxMessagesWaiting;/*< The number of items currently in the queue. */\r
 141         UBaseType_t uxLength;                   /*< The length of the queue defined as the number of items it will hold, not the number of bytes. */\r
 142         UBaseType_t uxItemSize;                 /*< The size of each items that the queue will hold. */\r
 143 \r
 144         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
 145         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
 146 \r
 147         #if ( configUSE_TRACE_FACILITY == 1 )\r
 148                 UBaseType_t uxQueueNumber;\r
 149                 uint8_t ucQueueType;\r
 150         #endif\r
 151 \r
 152         #if ( configUSE_QUEUE_SETS == 1 )\r
 153                 struct QueueDefinition *pxQueueSetContainer;\r
 154         #endif\r
 155 \r
 156 } xQUEUE;\r
 157 \r
 158 /* The old xQUEUE name is maintained above then typedefed to the new Queue_t\r
 159 name below to enable the use of older kernel aware debuggers. */\r
 160 typedef xQUEUE Queue_t;\r
 161 \r
 162 /*-----------------------------------------------------------*/\r
 163 \r
 164 /*\r
 165  * The queue registry is just a means for kernel aware debuggers to locate\r
 166  * queue structures.  It has no other purpose so is an optional component.\r
 167  */\r
 168 #if ( configQUEUE_REGISTRY_SIZE > 0 )\r
 169 \r
 170         /* The type stored within the queue registry array.  This allows a name\r
 171         to be assigned to each queue making kernel aware debugging a little\r
 172         more user friendly. */\r
 173         typedef struct QUEUE_REGISTRY_ITEM\r
 174         {\r
 175                 const char *pcQueueName; /*lint !e971 Unqualified char types are allowed for strings and single characters only. */\r
 176                 QueueHandle_t xHandle;\r
 177         } xQueueRegistryItem;\r
 178 \r
 179         /* The old xQueueRegistryItem name is maintained above then typedefed to the\r
 180         new xQueueRegistryItem name below to enable the use of older kernel aware\r
 181         debuggers. */\r
 182         typedef xQueueRegistryItem QueueRegistryItem_t;\r
 183 \r
 184         /* The queue registry is simply an array of QueueRegistryItem_t structures.\r
 185         The pcQueueName member of a structure being NULL is indicative of the\r
 186         array position being vacant. */\r
 187         QueueRegistryItem_t xQueueRegistry[ configQUEUE_REGISTRY_SIZE ];\r
 188 \r
 189 #endif /* configQUEUE_REGISTRY_SIZE */\r
 190 \r
 191 /*\r
 192  * Unlocks a queue locked by a call to prvLockQueue.  Locking a queue does not\r
 193  * prevent an ISR from adding or removing items to the queue, but does prevent\r
 194  * an ISR from removing tasks from the queue event lists.  If an ISR finds a\r
 195  * queue is locked it will instead increment the appropriate queue lock count\r
 196  * to indicate that a task may require unblocking.  When the queue in unlocked\r
 197  * these lock counts are inspected, and the appropriate action taken.\r
 198  */\r
 199 static void prvUnlockQueue( Queue_t * const pxQueue ) PRIVILEGED_FUNCTION;\r
 200 \r
 201 /*\r
 202  * Uses a critical section to determine if there is any data in a queue.\r
 203  *\r
 204  * @return pdTRUE if the queue contains no items, otherwise pdFALSE.\r
 205  */\r
 206 static BaseType_t prvIsQueueEmpty( const Queue_t *pxQueue ) PRIVILEGED_FUNCTION;\r
 207 \r
 208 /*\r
 209  * Uses a critical section to determine if there is any space in a queue.\r
 210  *\r
 211  * @return pdTRUE if there is no space, otherwise pdFALSE;\r
 212  */\r
 213 static BaseType_t prvIsQueueFull( const Queue_t *pxQueue ) PRIVILEGED_FUNCTION;\r
 214 \r
 215 /*\r
 216  * Copies an item into the queue, either at the front of the queue or the\r
 217  * back of the queue.\r
 218  */\r
 219 static BaseType_t prvCopyDataToQueue( Queue_t * const pxQueue, const void *pvItemToQueue, const BaseType_t xPosition ) PRIVILEGED_FUNCTION;\r
 220 \r
 221 /*\r
 222  * Copies an item out of a queue.\r
 223  */\r
 224 static void prvCopyDataFromQueue( Queue_t * const pxQueue, void * const pvBuffer ) PRIVILEGED_FUNCTION;\r
 225 \r
 226 #if ( configUSE_QUEUE_SETS == 1 )\r
 227         /*\r
 228          * Checks to see if a queue is a member of a queue set, and if so, notifies\r
 229          * the queue set that the queue contains data.\r
 230          */\r
 231         static BaseType_t prvNotifyQueueSetContainer( const Queue_t * const pxQueue, const BaseType_t xCopyPosition ) PRIVILEGED_FUNCTION;\r
 232 #endif\r
 233 \r
 234 /*-----------------------------------------------------------*/\r
 235 \r
 236 /*\r
 237  * Macro to mark a queue as locked.  Locking a queue prevents an ISR from\r
 238  * accessing the queue event lists.\r
 239  */\r
 240 #define prvLockQueue( pxQueue )                                                         \\r
 241         taskENTER_CRITICAL();                                                                   \\r
 242         {                                                                                                               \\r
 243                 if( ( pxQueue )->xRxLock == queueUNLOCKED )                     \\r
 244                 {                                                                                                       \\r
 245                         ( pxQueue )->xRxLock = queueLOCKED_UNMODIFIED;  \\r
 246                 }                                                                                                       \\r
 247                 if( ( pxQueue )->xTxLock == queueUNLOCKED )                     \\r
 248                 {                                                                                                       \\r
 249                         ( pxQueue )->xTxLock = queueLOCKED_UNMODIFIED;  \\r
 250                 }                                                                                                       \\r
 251         }                                                                                                               \\r
 252         taskEXIT_CRITICAL()\r
 253 /*-----------------------------------------------------------*/\r
 254 \r
 255 BaseType_t xQueueGenericReset( QueueHandle_t xQueue, BaseType_t xNewQueue )\r
 256 {\r
 257 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
 258 \r
 259         configASSERT( pxQueue );\r
 260 \r
 261         taskENTER_CRITICAL();\r
 262         {\r
 263                 pxQueue->pcTail = pxQueue->pcHead + ( pxQueue->uxLength * pxQueue->uxItemSize );\r
 264                 pxQueue->uxMessagesWaiting = ( UBaseType_t ) 0U;\r
 265                 pxQueue->pcWriteTo = pxQueue->pcHead;\r
 266                 pxQueue->u.pcReadFrom = pxQueue->pcHead + ( ( pxQueue->uxLength - ( UBaseType_t ) 1U ) * pxQueue->uxItemSize );\r
 267                 pxQueue->xRxLock = queueUNLOCKED;\r
 268                 pxQueue->xTxLock = queueUNLOCKED;\r
 269 \r
 270                 if( xNewQueue == pdFALSE )\r
 271                 {\r
 272                         /* If there are tasks blocked waiting to read from the queue, then\r
 273                         the tasks will remain blocked as after this function exits the queue\r
 274                         will still be empty.  If there are tasks blocked waiting to write to\r
 275                         the queue, then one should be unblocked as after this function exits\r
 276                         it will be possible to write to it. */\r
 277                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
 278                         {\r
 279                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) == pdTRUE )\r
 280                                 {\r
 281                                         queueYIELD_IF_USING_PREEMPTION();\r
 282                                 }\r
 283                                 else\r
 284                                 {\r
 285                                         mtCOVERAGE_TEST_MARKER();\r
 286                                 }\r
 287                         }\r
 288                         else\r
 289                         {\r
 290                                 mtCOVERAGE_TEST_MARKER();\r
 291                         }\r
 292                 }\r
 293                 else\r
 294                 {\r
 295                         /* Ensure the event queues start in the correct state. */\r
 296                         vListInitialise( &( pxQueue->xTasksWaitingToSend ) );\r
 297                         vListInitialise( &( pxQueue->xTasksWaitingToReceive ) );\r
 298                 }\r
 299         }\r
 300         taskEXIT_CRITICAL();\r
 301 \r
 302         /* A value is returned for calling semantic consistency with previous\r
 303         versions. */\r
 304         return pdPASS;\r
 305 }\r
 306 /*-----------------------------------------------------------*/\r
 307 \r
 308 QueueHandle_t xQueueGenericCreate( const UBaseType_t uxQueueLength, const UBaseType_t uxItemSize, const uint8_t ucQueueType )\r
 309 {\r
 310 Queue_t *pxNewQueue;\r
 311 size_t xQueueSizeInBytes;\r
 312 QueueHandle_t xReturn = NULL;\r
 313 \r
 314         /* Remove compiler warnings about unused parameters should\r
 315         configUSE_TRACE_FACILITY not be set to 1. */\r
 316         ( void ) ucQueueType;\r
 317 \r
 318         /* Allocate the new queue structure. */\r
 319         if( uxQueueLength > ( UBaseType_t ) 0 )\r
 320         {\r
 321                 pxNewQueue = ( Queue_t * ) pvPortMalloc( sizeof( Queue_t ) );\r
 322                 if( pxNewQueue != NULL )\r
 323                 {\r
 324                         /* Create the list of pointers to queue items.  The queue is one byte\r
 325                         longer than asked for to make wrap checking easier/faster. */\r
 326                         xQueueSizeInBytes = ( size_t ) ( uxQueueLength * uxItemSize ) + ( size_t ) 1; /*lint !e961 MISRA exception as the casts are only redundant for some ports. */\r
 327 \r
 328                         pxNewQueue->pcHead = ( int8_t * ) pvPortMalloc( xQueueSizeInBytes );\r
 329                         if( pxNewQueue->pcHead != NULL )\r
 330                         {\r
 331                                 /* Initialise the queue members as described above where the\r
 332                                 queue type is defined. */\r
 333                                 pxNewQueue->uxLength = uxQueueLength;\r
 334                                 pxNewQueue->uxItemSize = uxItemSize;\r
 335                                 ( void ) xQueueGenericReset( pxNewQueue, pdTRUE );\r
 336 \r
 337                                 #if ( configUSE_TRACE_FACILITY == 1 )\r
 338                                 {\r
 339                                         pxNewQueue->ucQueueType = ucQueueType;\r
 340                                 }\r
 341                                 #endif /* configUSE_TRACE_FACILITY */\r
 342 \r
 343                                 #if( configUSE_QUEUE_SETS == 1 )\r
 344                                 {\r
 345                                         pxNewQueue->pxQueueSetContainer = NULL;\r
 346                                 }\r
 347                                 #endif /* configUSE_QUEUE_SETS */\r
 348 \r
 349                                 traceQUEUE_CREATE( pxNewQueue );\r
 350                                 xReturn = pxNewQueue;\r
 351                         }\r
 352                         else\r
 353                         {\r
 354                                 traceQUEUE_CREATE_FAILED( ucQueueType );\r
 355                                 vPortFree( pxNewQueue );\r
 356                         }\r
 357                 }\r
 358                 else\r
 359                 {\r
 360                         mtCOVERAGE_TEST_MARKER();\r
 361                 }\r
 362         }\r
 363         else\r
 364         {\r
 365                 mtCOVERAGE_TEST_MARKER();\r
 366         }\r
 367 \r
 368         configASSERT( xReturn );\r
 369 \r
 370         return xReturn;\r
 371 }\r
 372 /*-----------------------------------------------------------*/\r
 373 \r
 374 #if ( configUSE_MUTEXES == 1 )\r
 375 \r
 376         QueueHandle_t xQueueCreateMutex( const uint8_t ucQueueType )\r
 377         {\r
 378         Queue_t *pxNewQueue;\r
 379 \r
 380                 /* Prevent compiler warnings about unused parameters if\r
 381                 configUSE_TRACE_FACILITY does not equal 1. */\r
 382                 ( void ) ucQueueType;\r
 383 \r
 384                 /* Allocate the new queue structure. */\r
 385                 pxNewQueue = ( Queue_t * ) pvPortMalloc( sizeof( Queue_t ) );\r
 386                 if( pxNewQueue != NULL )\r
 387                 {\r
 388                         /* Information required for priority inheritance. */\r
 389                         pxNewQueue->pxMutexHolder = NULL;\r
 390                         pxNewQueue->uxQueueType = queueQUEUE_IS_MUTEX;\r
 391 \r
 392                         /* Queues used as a mutex no data is actually copied into or out\r
 393                         of the queue. */\r
 394                         pxNewQueue->pcWriteTo = NULL;\r
 395                         pxNewQueue->u.pcReadFrom = NULL;\r
 396 \r
 397                         /* Each mutex has a length of 1 (like a binary semaphore) and\r
 398                         an item size of 0 as nothing is actually copied into or out\r
 399                         of the mutex. */\r
 400                         pxNewQueue->uxMessagesWaiting = ( UBaseType_t ) 0U;\r
 401                         pxNewQueue->uxLength = ( UBaseType_t ) 1U;\r
 402                         pxNewQueue->uxItemSize = ( UBaseType_t ) 0U;\r
 403                         pxNewQueue->xRxLock = queueUNLOCKED;\r
 404                         pxNewQueue->xTxLock = queueUNLOCKED;\r
 405 \r
 406                         #if ( configUSE_TRACE_FACILITY == 1 )\r
 407                         {\r
 408                                 pxNewQueue->ucQueueType = ucQueueType;\r
 409                         }\r
 410                         #endif\r
 411 \r
 412                         #if ( configUSE_QUEUE_SETS == 1 )\r
 413                         {\r
 414                                 pxNewQueue->pxQueueSetContainer = NULL;\r
 415                         }\r
 416                         #endif\r
 417 \r
 418                         /* Ensure the event queues start with the correct state. */\r
 419                         vListInitialise( &( pxNewQueue->xTasksWaitingToSend ) );\r
 420                         vListInitialise( &( pxNewQueue->xTasksWaitingToReceive ) );\r
 421 \r
 422                         traceCREATE_MUTEX( pxNewQueue );\r
 423 \r
 424                         /* Start with the semaphore in the expected state. */\r
 425                         ( void ) xQueueGenericSend( pxNewQueue, NULL, ( TickType_t ) 0U, queueSEND_TO_BACK );\r
 426                 }\r
 427                 else\r
 428                 {\r
 429                         traceCREATE_MUTEX_FAILED();\r
 430                 }\r
 431 \r
 432                 configASSERT( pxNewQueue );\r
 433                 return pxNewQueue;\r
 434         }\r
 435 \r
 436 #endif /* configUSE_MUTEXES */\r
 437 /*-----------------------------------------------------------*/\r
 438 \r
 439 #if ( ( configUSE_MUTEXES == 1 ) && ( INCLUDE_xSemaphoreGetMutexHolder == 1 ) )\r
 440 \r
 441         void* xQueueGetMutexHolder( QueueHandle_t xSemaphore )\r
 442         {\r
 443         void *pxReturn;\r
 444 \r
 445                 /* This function is called by xSemaphoreGetMutexHolder(), and should not\r
 446                 be called directly.  Note:  This is a good way of determining if the\r
 447                 calling task is the mutex holder, but not a good way of determining the\r
 448                 identity of the mutex holder, as the holder may change between the\r
 449                 following critical section exiting and the function returning. */\r
 450                 taskENTER_CRITICAL();\r
 451                 {\r
 452                         if( ( ( Queue_t * ) xSemaphore )->uxQueueType == queueQUEUE_IS_MUTEX )\r
 453                         {\r
 454                                 pxReturn = ( void * ) ( ( Queue_t * ) xSemaphore )->pxMutexHolder;\r
 455                         }\r
 456                         else\r
 457                         {\r
 458                                 pxReturn = NULL;\r
 459                         }\r
 460                 }\r
 461                 taskEXIT_CRITICAL();\r
 462 \r
 463                 return pxReturn;\r
 464         } /*lint !e818 xSemaphore cannot be a pointer to const because it is a typedef. */\r
 465 \r
 466 #endif\r
 467 /*-----------------------------------------------------------*/\r
 468 \r
 469 #if ( configUSE_RECURSIVE_MUTEXES == 1 )\r
 470 \r
 471         BaseType_t xQueueGiveMutexRecursive( QueueHandle_t xMutex )\r
 472         {\r
 473         BaseType_t xReturn;\r
 474         Queue_t * const pxMutex = ( Queue_t * ) xMutex;\r
 475 \r
 476                 configASSERT( pxMutex );\r
 477 \r
 478                 /* If this is the task that holds the mutex then pxMutexHolder will not\r
 479                 change outside of this task.  If this task does not hold the mutex then\r
 480                 pxMutexHolder can never coincidentally equal the tasks handle, and as\r
 481                 this is the only condition we are interested in it does not matter if\r
 482                 pxMutexHolder is accessed simultaneously by another task.  Therefore no\r
 483                 mutual exclusion is required to test the pxMutexHolder variable. */\r
 484                 if( pxMutex->pxMutexHolder == ( void * ) xTaskGetCurrentTaskHandle() ) /*lint !e961 Not a redundant cast as TaskHandle_t is a typedef. */\r
 485                 {\r
 486                         traceGIVE_MUTEX_RECURSIVE( pxMutex );\r
 487 \r
 488                         /* uxRecursiveCallCount cannot be zero if pxMutexHolder is equal to\r
 489                         the task handle, therefore no underflow check is required.  Also,\r
 490                         uxRecursiveCallCount is only modified by the mutex holder, and as\r
 491                         there can only be one, no mutual exclusion is required to modify the\r
 492                         uxRecursiveCallCount member. */\r
 493                         ( pxMutex->u.uxRecursiveCallCount )--;\r
 494 \r
 495                         /* Have we unwound the call count? */\r
 496                         if( pxMutex->u.uxRecursiveCallCount == ( UBaseType_t ) 0 )\r
 497                         {\r
 498                                 /* Return the mutex.  This will automatically unblock any other\r
 499                                 task that might be waiting to access the mutex. */\r
 500                                 ( void ) xQueueGenericSend( pxMutex, NULL, queueMUTEX_GIVE_BLOCK_TIME, queueSEND_TO_BACK );\r
 501                         }\r
 502                         else\r
 503                         {\r
 504                                 mtCOVERAGE_TEST_MARKER();\r
 505                         }\r
 506 \r
 507                         xReturn = pdPASS;\r
 508                 }\r
 509                 else\r
 510                 {\r
 511                         /* The mutex cannot be given because the calling task is not the\r
 512                         holder. */\r
 513                         xReturn = pdFAIL;\r
 514 \r
 515                         traceGIVE_MUTEX_RECURSIVE_FAILED( pxMutex );\r
 516                 }\r
 517 \r
 518                 return xReturn;\r
 519         }\r
 520 \r
 521 #endif /* configUSE_RECURSIVE_MUTEXES */\r
 522 /*-----------------------------------------------------------*/\r
 523 \r
 524 #if ( configUSE_RECURSIVE_MUTEXES == 1 )\r
 525 \r
 526         BaseType_t xQueueTakeMutexRecursive( QueueHandle_t xMutex, TickType_t xTicksToWait )\r
 527         {\r
 528         BaseType_t xReturn;\r
 529         Queue_t * const pxMutex = ( Queue_t * ) xMutex;\r
 530 \r
 531                 configASSERT( pxMutex );\r
 532 \r
 533                 /* Comments regarding mutual exclusion as per those within\r
 534                 xQueueGiveMutexRecursive(). */\r
 535 \r
 536                 traceTAKE_MUTEX_RECURSIVE( pxMutex );\r
 537 \r
 538                 if( pxMutex->pxMutexHolder == ( void * ) xTaskGetCurrentTaskHandle() ) /*lint !e961 Cast is not redundant as TaskHandle_t is a typedef. */\r
 539                 {\r
 540                         ( pxMutex->u.uxRecursiveCallCount )++;\r
 541                         xReturn = pdPASS;\r
 542                 }\r
 543                 else\r
 544                 {\r
 545                         xReturn = xQueueGenericReceive( pxMutex, NULL, xTicksToWait, pdFALSE );\r
 546 \r
 547                         /* pdPASS will only be returned if the mutex was successfully\r
 548                         obtained.  The calling task may have entered the Blocked state\r
 549                         before reaching here. */\r
 550                         if( xReturn == pdPASS )\r
 551                         {\r
 552                                 ( pxMutex->u.uxRecursiveCallCount )++;\r
 553                         }\r
 554                         else\r
 555                         {\r
 556                                 traceTAKE_MUTEX_RECURSIVE_FAILED( pxMutex );\r
 557                         }\r
 558                 }\r
 559 \r
 560                 return xReturn;\r
 561         }\r
 562 \r
 563 #endif /* configUSE_RECURSIVE_MUTEXES */\r
 564 /*-----------------------------------------------------------*/\r
 565 \r
 566 #if ( configUSE_COUNTING_SEMAPHORES == 1 )\r
 567 \r
 568         QueueHandle_t xQueueCreateCountingSemaphore( const UBaseType_t uxMaxCount, const UBaseType_t uxInitialCount )\r
 569         {\r
 570         QueueHandle_t xHandle;\r
 571 \r
 572                 configASSERT( uxMaxCount != 0 );\r
 573                 configASSERT( uxInitialCount <= uxMaxCount );\r
 574 \r
 575                 xHandle = xQueueGenericCreate( uxMaxCount, queueSEMAPHORE_QUEUE_ITEM_LENGTH, queueQUEUE_TYPE_COUNTING_SEMAPHORE );\r
 576 \r
 577                 if( xHandle != NULL )\r
 578                 {\r
 579                         ( ( Queue_t * ) xHandle )->uxMessagesWaiting = uxInitialCount;\r
 580 \r
 581                         traceCREATE_COUNTING_SEMAPHORE();\r
 582                 }\r
 583                 else\r
 584                 {\r
 585                         traceCREATE_COUNTING_SEMAPHORE_FAILED();\r
 586                 }\r
 587 \r
 588                 configASSERT( xHandle );\r
 589                 return xHandle;\r
 590         }\r
 591 \r
 592 #endif /* configUSE_COUNTING_SEMAPHORES */\r
 593 /*-----------------------------------------------------------*/\r
 594 \r
 595 BaseType_t xQueueGenericSend( QueueHandle_t xQueue, const void * const pvItemToQueue, TickType_t xTicksToWait, const BaseType_t xCopyPosition )\r
 596 {\r
 597 BaseType_t xEntryTimeSet = pdFALSE, xYieldRequired;\r
 598 TimeOut_t xTimeOut;\r
 599 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
 600 \r
 601         configASSERT( pxQueue );\r
 602         configASSERT( !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
 603         configASSERT( !( ( xCopyPosition == queueOVERWRITE ) && ( pxQueue->uxLength != 1 ) ) );\r
 604         #if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )\r
 605         {\r
 606                 configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );\r
 607         }\r
 608         #endif\r
 609 \r
 610 \r
 611         /* This function relaxes the coding standard somewhat to allow return\r
 612         statements within the function itself.  This is done in the interest\r
 613         of execution time efficiency. */\r
 614         for( ;; )\r
 615         {\r
 616                 taskENTER_CRITICAL();\r
 617                 {\r
 618                         /* Is there room on the queue now?  The running task must be\r
 619                         the highest priority task wanting to access the queue.  If\r
 620                         the head item in the queue is to be overwritten then it does\r
 621                         not matter if the queue is full. */\r
 622                         if( ( pxQueue->uxMessagesWaiting < pxQueue->uxLength ) || ( xCopyPosition == queueOVERWRITE ) )\r
 623                         {\r
 624                                 traceQUEUE_SEND( pxQueue );\r
 625                                 xYieldRequired = prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );\r
 626 \r
 627                                 #if ( configUSE_QUEUE_SETS == 1 )\r
 628                                 {\r
 629                                         if( pxQueue->pxQueueSetContainer != NULL )\r
 630                                         {\r
 631                                                 if( prvNotifyQueueSetContainer( pxQueue, xCopyPosition ) == pdTRUE )\r
 632                                                 {\r
 633                                                         /* The queue is a member of a queue set, and posting\r
 634                                                         to the queue set caused a higher priority task to\r
 635                                                         unblock. A context switch is required. */\r
 636                                                         queueYIELD_IF_USING_PREEMPTION();\r
 637                                                 }\r
 638                                                 else\r
 639                                                 {\r
 640                                                         mtCOVERAGE_TEST_MARKER();\r
 641                                                 }\r
 642                                         }\r
 643                                         else\r
 644                                         {\r
 645                                                 /* If there was a task waiting for data to arrive on the\r
 646                                                 queue then unblock it now. */\r
 647                                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
 648                                                 {\r
 649                                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) == pdTRUE )\r
 650                                                         {\r
 651                                                                 /* The unblocked task has a priority higher than\r
 652                                                                 our own so yield immediately.  Yes it is ok to\r
 653                                                                 do this from within the critical section - the\r
 654                                                                 kernel takes care of that. */\r
 655                                                                 queueYIELD_IF_USING_PREEMPTION();\r
 656                                                         }\r
 657                                                         else\r
 658                                                         {\r
 659                                                                 mtCOVERAGE_TEST_MARKER();\r
 660                                                         }\r
 661                                                 }\r
 662                                                 else if( xYieldRequired != pdFALSE )\r
 663                                                 {\r
 664                                                         /* This path is a special case that will only get\r
 665                                                         executed if the task was holding multiple mutexes\r
 666                                                         and the mutexes were given back in an order that is\r
 667                                                         different to that in which they were taken. */\r
 668                                                         queueYIELD_IF_USING_PREEMPTION();\r
 669                                                 }\r
 670                                                 else\r
 671                                                 {\r
 672                                                         mtCOVERAGE_TEST_MARKER();\r
 673                                                 }\r
 674                                         }\r
 675                                 }\r
 676                                 #else /* configUSE_QUEUE_SETS */\r
 677                                 {\r
 678                                         /* If there was a task waiting for data to arrive on the\r
 679                                         queue then unblock it now. */\r
 680                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
 681                                         {\r
 682                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) == pdTRUE )\r
 683                                                 {\r
 684                                                         /* The unblocked task has a priority higher than\r
 685                                                         our own so yield immediately.  Yes it is ok to do\r
 686                                                         this from within the critical section - the kernel\r
 687                                                         takes care of that. */\r
 688                                                         queueYIELD_IF_USING_PREEMPTION();\r
 689                                                 }\r
 690                                                 else\r
 691                                                 {\r
 692                                                         mtCOVERAGE_TEST_MARKER();\r
 693                                                 }\r
 694                                         }\r
 695                                         else if( xYieldRequired != pdFALSE )\r
 696                                         {\r
 697                                                 /* This path is a special case that will only get\r
 698                                                 executed if the task was holding multiple mutexes and\r
 699                                                 the mutexes were given back in an order that is\r
 700                                                 different to that in which they were taken. */\r
 701                                                 queueYIELD_IF_USING_PREEMPTION();\r
 702                                         }\r
 703                                         else\r
 704                                         {\r
 705                                                 mtCOVERAGE_TEST_MARKER();\r
 706                                         }\r
 707                                 }\r
 708                                 #endif /* configUSE_QUEUE_SETS */\r
 709 \r
 710                                 taskEXIT_CRITICAL();\r
 711                                 return pdPASS;\r
 712                         }\r
 713                         else\r
 714                         {\r
 715                                 if( xTicksToWait == ( TickType_t ) 0 )\r
 716                                 {\r
 717                                         /* The queue was full and no block time is specified (or\r
 718                                         the block time has expired) so leave now. */\r
 719                                         taskEXIT_CRITICAL();\r
 720 \r
 721                                         /* Return to the original privilege level before exiting\r
 722                                         the function. */\r
 723                                         traceQUEUE_SEND_FAILED( pxQueue );\r
 724                                         return errQUEUE_FULL;\r
 725                                 }\r
 726                                 else if( xEntryTimeSet == pdFALSE )\r
 727                                 {\r
 728                                         /* The queue was full and a block time was specified so\r
 729                                         configure the timeout structure. */\r
 730                                         vTaskSetTimeOutState( &xTimeOut );\r
 731                                         xEntryTimeSet = pdTRUE;\r
 732                                 }\r
 733                                 else\r
 734                                 {\r
 735                                         /* Entry time was already set. */\r
 736                                         mtCOVERAGE_TEST_MARKER();\r
 737                                 }\r
 738                         }\r
 739                 }\r
 740                 taskEXIT_CRITICAL();\r
 741 \r
 742                 /* Interrupts and other tasks can send to and receive from the queue\r
 743                 now the critical section has been exited. */\r
 744 \r
 745                 vTaskSuspendAll();\r
 746                 prvLockQueue( pxQueue );\r
 747 \r
 748                 /* Update the timeout state to see if it has expired yet. */\r
 749                 if( xTaskCheckForTimeOut( &xTimeOut, &xTicksToWait ) == pdFALSE )\r
 750                 {\r
 751                         if( prvIsQueueFull( pxQueue ) != pdFALSE )\r
 752                         {\r
 753                                 traceBLOCKING_ON_QUEUE_SEND( pxQueue );\r
 754                                 vTaskPlaceOnEventList( &( pxQueue->xTasksWaitingToSend ), xTicksToWait );\r
 755 \r
 756                                 /* Unlocking the queue means queue events can effect the\r
 757                                 event list.  It is possible     that interrupts occurring now\r
 758                                 remove this task from the event list again - but as the\r
 759                                 scheduler is suspended the task will go onto the pending\r
 760                                 ready last instead of the actual ready list. */\r
 761                                 prvUnlockQueue( pxQueue );\r
 762 \r
 763                                 /* Resuming the scheduler will move tasks from the pending\r
 764                                 ready list into the ready list - so it is feasible that this\r
 765                                 task is already in a ready list before it yields - in which\r
 766                                 case the yield will not cause a context switch unless there\r
 767                                 is also a higher priority task in the pending ready list. */\r
 768                                 if( xTaskResumeAll() == pdFALSE )\r
 769                                 {\r
 770                                         portYIELD_WITHIN_API();\r
 771                                 }\r
 772                         }\r
 773                         else\r
 774                         {\r
 775                                 /* Try again. */\r
 776                                 prvUnlockQueue( pxQueue );\r
 777                                 ( void ) xTaskResumeAll();\r
 778                         }\r
 779                 }\r
 780                 else\r
 781                 {\r
 782                         /* The timeout has expired. */\r
 783                         prvUnlockQueue( pxQueue );\r
 784                         ( void ) xTaskResumeAll();\r
 785 \r
 786                         /* Return to the original privilege level before exiting the\r
 787                         function. */\r
 788                         traceQUEUE_SEND_FAILED( pxQueue );\r
 789                         return errQUEUE_FULL;\r
 790                 }\r
 791         }\r
 792 }\r
 793 /*-----------------------------------------------------------*/\r
 794 \r
 795 #if ( configUSE_ALTERNATIVE_API == 1 )\r
 796 \r
 797         BaseType_t xQueueAltGenericSend( QueueHandle_t xQueue, const void * const pvItemToQueue, TickType_t xTicksToWait, BaseType_t xCopyPosition )\r
 798         {\r
 799         BaseType_t xEntryTimeSet = pdFALSE;\r
 800         TimeOut_t xTimeOut;\r
 801         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
 802 \r
 803                 configASSERT( pxQueue );\r
 804                 configASSERT( !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
 805 \r
 806                 for( ;; )\r
 807                 {\r
 808                         taskENTER_CRITICAL();\r
 809                         {\r
 810                                 /* Is there room on the queue now?  To be running we must be\r
 811                                 the highest priority task wanting to access the queue. */\r
 812                                 if( pxQueue->uxMessagesWaiting < pxQueue->uxLength )\r
 813                                 {\r
 814                                         traceQUEUE_SEND( pxQueue );\r
 815                                         prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );\r
 816 \r
 817                                         /* If there was a task waiting for data to arrive on the\r
 818                                         queue then unblock it now. */\r
 819                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
 820                                         {\r
 821                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) == pdTRUE )\r
 822                                                 {\r
 823                                                         /* The unblocked task has a priority higher than\r
 824                                                         our own so yield immediately. */\r
 825                                                         portYIELD_WITHIN_API();\r
 826                                                 }\r
 827                                                 else\r
 828                                                 {\r
 829                                                         mtCOVERAGE_TEST_MARKER();\r
 830                                                 }\r
 831                                         }\r
 832                                         else\r
 833                                         {\r
 834                                                 mtCOVERAGE_TEST_MARKER();\r
 835                                         }\r
 836 \r
 837                                         taskEXIT_CRITICAL();\r
 838                                         return pdPASS;\r
 839                                 }\r
 840                                 else\r
 841                                 {\r
 842                                         if( xTicksToWait == ( TickType_t ) 0 )\r
 843                                         {\r
 844                                                 taskEXIT_CRITICAL();\r
 845                                                 return errQUEUE_FULL;\r
 846                                         }\r
 847                                         else if( xEntryTimeSet == pdFALSE )\r
 848                                         {\r
 849                                                 vTaskSetTimeOutState( &xTimeOut );\r
 850                                                 xEntryTimeSet = pdTRUE;\r
 851                                         }\r
 852                                 }\r
 853                         }\r
 854                         taskEXIT_CRITICAL();\r
 855 \r
 856                         taskENTER_CRITICAL();\r
 857                         {\r
 858                                 if( xTaskCheckForTimeOut( &xTimeOut, &xTicksToWait ) == pdFALSE )\r
 859                                 {\r
 860                                         if( prvIsQueueFull( pxQueue ) != pdFALSE )\r
 861                                         {\r
 862                                                 traceBLOCKING_ON_QUEUE_SEND( pxQueue );\r
 863                                                 vTaskPlaceOnEventList( &( pxQueue->xTasksWaitingToSend ), xTicksToWait );\r
 864                                                 portYIELD_WITHIN_API();\r
 865                                         }\r
 866                                         else\r
 867                                         {\r
 868                                                 mtCOVERAGE_TEST_MARKER();\r
 869                                         }\r
 870                                 }\r
 871                                 else\r
 872                                 {\r
 873                                         taskEXIT_CRITICAL();\r
 874                                         traceQUEUE_SEND_FAILED( pxQueue );\r
 875                                         return errQUEUE_FULL;\r
 876                                 }\r
 877                         }\r
 878                         taskEXIT_CRITICAL();\r
 879                 }\r
 880         }\r
 881 \r
 882 #endif /* configUSE_ALTERNATIVE_API */\r
 883 /*-----------------------------------------------------------*/\r
 884 \r
 885 #if ( configUSE_ALTERNATIVE_API == 1 )\r
 886 \r
 887         BaseType_t xQueueAltGenericReceive( QueueHandle_t xQueue, void * const pvBuffer, TickType_t xTicksToWait, BaseType_t xJustPeeking )\r
 888         {\r
 889         BaseType_t xEntryTimeSet = pdFALSE;\r
 890         TimeOut_t xTimeOut;\r
 891         int8_t *pcOriginalReadPosition;\r
 892         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
 893 \r
 894                 configASSERT( pxQueue );\r
 895                 configASSERT( !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
 896 \r
 897                 for( ;; )\r
 898                 {\r
 899                         taskENTER_CRITICAL();\r
 900                         {\r
 901                                 if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
 902                                 {\r
 903                                         /* Remember our read position in case we are just peeking. */\r
 904                                         pcOriginalReadPosition = pxQueue->u.pcReadFrom;\r
 905 \r
 906                                         prvCopyDataFromQueue( pxQueue, pvBuffer );\r
 907 \r
 908                                         if( xJustPeeking == pdFALSE )\r
 909                                         {\r
 910                                                 traceQUEUE_RECEIVE( pxQueue );\r
 911 \r
 912                                                 /* Data is actually being removed (not just peeked). */\r
 913                                                 --( pxQueue->uxMessagesWaiting );\r
 914 \r
 915                                                 #if ( configUSE_MUTEXES == 1 )\r
 916                                                 {\r
 917                                                         if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
 918                                                         {\r
 919                                                                 /* Record the information required to implement\r
 920                                                                 priority inheritance should it become necessary. */\r
 921                                                                 pxQueue->pxMutexHolder = ( int8_t * ) xTaskGetCurrentTaskHandle();\r
 922                                                         }\r
 923                                                         else\r
 924                                                         {\r
 925                                                                 mtCOVERAGE_TEST_MARKER();\r
 926                                                         }\r
 927                                                 }\r
 928                                                 #endif\r
 929 \r
 930                                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
 931                                                 {\r
 932                                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) == pdTRUE )\r
 933                                                         {\r
 934                                                                 portYIELD_WITHIN_API();\r
 935                                                         }\r
 936                                                         else\r
 937                                                         {\r
 938                                                                 mtCOVERAGE_TEST_MARKER();\r
 939                                                         }\r
 940                                                 }\r
 941                                         }\r
 942                                         else\r
 943                                         {\r
 944                                                 traceQUEUE_PEEK( pxQueue );\r
 945 \r
 946                                                 /* We are not removing the data, so reset our read\r
 947                                                 pointer. */\r
 948                                                 pxQueue->u.pcReadFrom = pcOriginalReadPosition;\r
 949 \r
 950                                                 /* The data is being left in the queue, so see if there are\r
 951                                                 any other tasks waiting for the data. */\r
 952                                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
 953                                                 {\r
 954                                                         /* Tasks that are removed from the event list will get added to\r
 955                                                         the pending ready list as the scheduler is still suspended. */\r
 956                                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
 957                                                         {\r
 958                                                                 /* The task waiting has a higher priority than this task. */\r
 959                                                                 portYIELD_WITHIN_API();\r
 960                                                         }\r
 961                                                         else\r
 962                                                         {\r
 963                                                                 mtCOVERAGE_TEST_MARKER();\r
 964                                                         }\r
 965                                                 }\r
 966                                                 else\r
 967                                                 {\r
 968                                                         mtCOVERAGE_TEST_MARKER();\r
 969                                                 }\r
 970                                         }\r
 971 \r
 972                                         taskEXIT_CRITICAL();\r
 973                                         return pdPASS;\r
 974                                 }\r
 975                                 else\r
 976                                 {\r
 977                                         if( xTicksToWait == ( TickType_t ) 0 )\r
 978                                         {\r
 979                                                 taskEXIT_CRITICAL();\r
 980                                                 traceQUEUE_RECEIVE_FAILED( pxQueue );\r
 981                                                 return errQUEUE_EMPTY;\r
 982                                         }\r
 983                                         else if( xEntryTimeSet == pdFALSE )\r
 984                                         {\r
 985                                                 vTaskSetTimeOutState( &xTimeOut );\r
 986                                                 xEntryTimeSet = pdTRUE;\r
 987                                         }\r
 988                                 }\r
 989                         }\r
 990                         taskEXIT_CRITICAL();\r
 991 \r
 992                         taskENTER_CRITICAL();\r
 993                         {\r
 994                                 if( xTaskCheckForTimeOut( &xTimeOut, &xTicksToWait ) == pdFALSE )\r
 995                                 {\r
 996                                         if( prvIsQueueEmpty( pxQueue ) != pdFALSE )\r
 997                                         {\r
 998                                                 traceBLOCKING_ON_QUEUE_RECEIVE( pxQueue );\r
 999 \r
1000                                                 #if ( configUSE_MUTEXES == 1 )\r
1001                                                 {\r
1002                                                         if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
1003                                                         {\r
1004                                                                 taskENTER_CRITICAL();\r
1005                                                                 {\r
1006                                                                         vTaskPriorityInherit( ( void * ) pxQueue->pxMutexHolder );\r
1007                                                                 }\r
1008                                                                 taskEXIT_CRITICAL();\r
1009                                                         }\r
1010                                                         else\r
1011                                                         {\r
1012                                                                 mtCOVERAGE_TEST_MARKER();\r
1013                                                         }\r
1014                                                 }\r
1015                                                 #endif\r
1016 \r
1017                                                 vTaskPlaceOnEventList( &( pxQueue->xTasksWaitingToReceive ), xTicksToWait );\r
1018                                                 portYIELD_WITHIN_API();\r
1019                                         }\r
1020                                         else\r
1021                                         {\r
1022                                                 mtCOVERAGE_TEST_MARKER();\r
1023                                         }\r
1024                                 }\r
1025                                 else\r
1026                                 {\r
1027                                         taskEXIT_CRITICAL();\r
1028                                         traceQUEUE_RECEIVE_FAILED( pxQueue );\r
1029                                         return errQUEUE_EMPTY;\r
1030                                 }\r
1031                         }\r
1032                         taskEXIT_CRITICAL();\r
1033                 }\r
1034         }\r
1035 \r
1036 \r
1037 #endif /* configUSE_ALTERNATIVE_API */\r
1038 /*-----------------------------------------------------------*/\r
1039 \r
1040 BaseType_t xQueueGenericSendFromISR( QueueHandle_t xQueue, const void * const pvItemToQueue, BaseType_t * const pxHigherPriorityTaskWoken, const BaseType_t xCopyPosition )\r
1041 {\r
1042 BaseType_t xReturn;\r
1043 UBaseType_t uxSavedInterruptStatus;\r
1044 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1045 \r
1046         configASSERT( pxQueue );\r
1047         configASSERT( !( ( pvItemToQueue == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
1048         configASSERT( !( ( xCopyPosition == queueOVERWRITE ) && ( pxQueue->uxLength != 1 ) ) );\r
1049 \r
1050         /* RTOS ports that support interrupt nesting have the concept of a maximum\r
1051         system call (or maximum API call) interrupt priority.  Interrupts that are\r
1052         above the maximum system call priority are kept permanently enabled, even\r
1053         when the RTOS kernel is in a critical section, but cannot make any calls to\r
1054         FreeRTOS API functions.  If configASSERT() is defined in FreeRTOSConfig.h\r
1055         then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion\r
1056         failure if a FreeRTOS API function is called from an interrupt that has been\r
1057         assigned a priority above the configured maximum system call priority.\r
1058         Only FreeRTOS functions that end in FromISR can be called from interrupts\r
1059         that have been assigned a priority at or (logically) below the maximum\r
1060         system call     interrupt priority.  FreeRTOS maintains a separate interrupt\r
1061         safe API to ensure interrupt entry is as fast and as simple as possible.\r
1062         More information (albeit Cortex-M specific) is provided on the following\r
1063         link: http://www.freertos.org/RTOS-Cortex-M3-M4.html */\r
1064         portASSERT_IF_INTERRUPT_PRIORITY_INVALID();\r
1065 \r
1066         /* Similar to xQueueGenericSend, except without blocking if there is no room\r
1067         in the queue.  Also don't directly wake a task that was blocked on a queue\r
1068         read, instead return a flag to say whether a context switch is required or\r
1069         not (i.e. has a task with a higher priority than us been woken by this\r
1070         post). */\r
1071         uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();\r
1072         {\r
1073                 if( ( pxQueue->uxMessagesWaiting < pxQueue->uxLength ) || ( xCopyPosition == queueOVERWRITE ) )\r
1074                 {\r
1075                         traceQUEUE_SEND_FROM_ISR( pxQueue );\r
1076 \r
1077                         if( prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition ) != pdFALSE )\r
1078                         {\r
1079                                 /* This is a special case that can only be executed if a task\r
1080                                 holds multiple mutexes and then gives the mutexes back in an\r
1081                                 order that is different to that in which they were taken. */\r
1082                                 if( pxHigherPriorityTaskWoken != NULL )\r
1083                                 {\r
1084                                         *pxHigherPriorityTaskWoken = pdTRUE;\r
1085                                 }\r
1086                                 else\r
1087                                 {\r
1088                                         mtCOVERAGE_TEST_MARKER();\r
1089                                 }\r
1090                         }\r
1091 \r
1092                         /* The event list is not altered if the queue is locked.  This will\r
1093                         be done when the queue is unlocked later. */\r
1094                         if( pxQueue->xTxLock == queueUNLOCKED )\r
1095                         {\r
1096                                 #if ( configUSE_QUEUE_SETS == 1 )\r
1097                                 {\r
1098                                         if( pxQueue->pxQueueSetContainer != NULL )\r
1099                                         {\r
1100                                                 if( prvNotifyQueueSetContainer( pxQueue, xCopyPosition ) == pdTRUE )\r
1101                                                 {\r
1102                                                         /* The queue is a member of a queue set, and posting\r
1103                                                         to the queue set caused a higher priority task to\r
1104                                                         unblock.  A context switch is required. */\r
1105                                                         if( pxHigherPriorityTaskWoken != NULL )\r
1106                                                         {\r
1107                                                                 *pxHigherPriorityTaskWoken = pdTRUE;\r
1108                                                         }\r
1109                                                         else\r
1110                                                         {\r
1111                                                                 mtCOVERAGE_TEST_MARKER();\r
1112                                                         }\r
1113                                                 }\r
1114                                                 else\r
1115                                                 {\r
1116                                                         mtCOVERAGE_TEST_MARKER();\r
1117                                                 }\r
1118                                         }\r
1119                                         else\r
1120                                         {\r
1121                                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1122                                                 {\r
1123                                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1124                                                         {\r
1125                                                                 /* The task waiting has a higher priority so\r
1126                                                                 record that a context switch is required. */\r
1127                                                                 if( pxHigherPriorityTaskWoken != NULL )\r
1128                                                                 {\r
1129                                                                         *pxHigherPriorityTaskWoken = pdTRUE;\r
1130                                                                 }\r
1131                                                                 else\r
1132                                                                 {\r
1133                                                                         mtCOVERAGE_TEST_MARKER();\r
1134                                                                 }\r
1135                                                         }\r
1136                                                         else\r
1137                                                         {\r
1138                                                                 mtCOVERAGE_TEST_MARKER();\r
1139                                                         }\r
1140                                                 }\r
1141                                                 else\r
1142                                                 {\r
1143                                                         mtCOVERAGE_TEST_MARKER();\r
1144                                                 }\r
1145                                         }\r
1146                                 }\r
1147                                 #else /* configUSE_QUEUE_SETS */\r
1148                                 {\r
1149                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1150                                         {\r
1151                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1152                                                 {\r
1153                                                         /* The task waiting has a higher priority so record that a\r
1154                                                         context switch is required. */\r
1155                                                         if( pxHigherPriorityTaskWoken != NULL )\r
1156                                                         {\r
1157                                                                 *pxHigherPriorityTaskWoken = pdTRUE;\r
1158                                                         }\r
1159                                                         else\r
1160                                                         {\r
1161                                                                 mtCOVERAGE_TEST_MARKER();\r
1162                                                         }\r
1163                                                 }\r
1164                                                 else\r
1165                                                 {\r
1166                                                         mtCOVERAGE_TEST_MARKER();\r
1167                                                 }\r
1168                                         }\r
1169                                         else\r
1170                                         {\r
1171                                                 mtCOVERAGE_TEST_MARKER();\r
1172                                         }\r
1173                                 }\r
1174                                 #endif /* configUSE_QUEUE_SETS */\r
1175                         }\r
1176                         else\r
1177                         {\r
1178                                 /* Increment the lock count so the task that unlocks the queue\r
1179                                 knows that data was posted while it was locked. */\r
1180                                 ++( pxQueue->xTxLock );\r
1181                         }\r
1182 \r
1183                         xReturn = pdPASS;\r
1184                 }\r
1185                 else\r
1186                 {\r
1187                         traceQUEUE_SEND_FROM_ISR_FAILED( pxQueue );\r
1188                         xReturn = errQUEUE_FULL;\r
1189                 }\r
1190         }\r
1191         portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );\r
1192 \r
1193         return xReturn;\r
1194 }\r
1195 /*-----------------------------------------------------------*/\r
1196 \r
1197 BaseType_t xQueueGenericReceive( QueueHandle_t xQueue, void * const pvBuffer, TickType_t xTicksToWait, const BaseType_t xJustPeeking )\r
1198 {\r
1199 BaseType_t xEntryTimeSet = pdFALSE;\r
1200 TimeOut_t xTimeOut;\r
1201 int8_t *pcOriginalReadPosition;\r
1202 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1203 \r
1204         configASSERT( pxQueue );\r
1205         configASSERT( !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
1206         #if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )\r
1207         {\r
1208                 configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );\r
1209         }\r
1210         #endif\r
1211 \r
1212         /* This function relaxes the coding standard somewhat to allow return\r
1213         statements within the function itself.  This is done in the interest\r
1214         of execution time efficiency. */\r
1215 \r
1216         for( ;; )\r
1217         {\r
1218                 taskENTER_CRITICAL();\r
1219                 {\r
1220                         /* Is there data in the queue now?  To be running we must be\r
1221                         the highest priority task wanting to access the queue. */\r
1222                         if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
1223                         {\r
1224                                 /* Remember the read position in case the queue is only being\r
1225                                 peeked. */\r
1226                                 pcOriginalReadPosition = pxQueue->u.pcReadFrom;\r
1227 \r
1228                                 prvCopyDataFromQueue( pxQueue, pvBuffer );\r
1229 \r
1230                                 if( xJustPeeking == pdFALSE )\r
1231                                 {\r
1232                                         traceQUEUE_RECEIVE( pxQueue );\r
1233 \r
1234                                         /* Actually removing data, not just peeking. */\r
1235                                         --( pxQueue->uxMessagesWaiting );\r
1236 \r
1237                                         #if ( configUSE_MUTEXES == 1 )\r
1238                                         {\r
1239                                                 if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
1240                                                 {\r
1241                                                         /* Record the information required to implement\r
1242                                                         priority inheritance should it become necessary. */\r
1243                                                         pxQueue->pxMutexHolder = ( int8_t * ) pvTaskIncrementMutexHeldCount(); /*lint !e961 Cast is not redundant as TaskHandle_t is a typedef. */\r
1244                                                 }\r
1245                                                 else\r
1246                                                 {\r
1247                                                         mtCOVERAGE_TEST_MARKER();\r
1248                                                 }\r
1249                                         }\r
1250                                         #endif /* configUSE_MUTEXES */\r
1251 \r
1252                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
1253                                         {\r
1254                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) == pdTRUE )\r
1255                                                 {\r
1256                                                         queueYIELD_IF_USING_PREEMPTION();\r
1257                                                 }\r
1258                                                 else\r
1259                                                 {\r
1260                                                         mtCOVERAGE_TEST_MARKER();\r
1261                                                 }\r
1262                                         }\r
1263                                         else\r
1264                                         {\r
1265                                                 mtCOVERAGE_TEST_MARKER();\r
1266                                         }\r
1267                                 }\r
1268                                 else\r
1269                                 {\r
1270                                         traceQUEUE_PEEK( pxQueue );\r
1271 \r
1272                                         /* The data is not being removed, so reset the read\r
1273                                         pointer. */\r
1274                                         pxQueue->u.pcReadFrom = pcOriginalReadPosition;\r
1275 \r
1276                                         /* The data is being left in the queue, so see if there are\r
1277                                         any other tasks waiting for the data. */\r
1278                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1279                                         {\r
1280                                                 /* Tasks that are removed from the event list will get added to\r
1281                                                 the pending ready list as the scheduler is still suspended. */\r
1282                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1283                                                 {\r
1284                                                         /* The task waiting has a higher priority than this task. */\r
1285                                                         queueYIELD_IF_USING_PREEMPTION();\r
1286                                                 }\r
1287                                                 else\r
1288                                                 {\r
1289                                                         mtCOVERAGE_TEST_MARKER();\r
1290                                                 }\r
1291                                         }\r
1292                                         else\r
1293                                         {\r
1294                                                 mtCOVERAGE_TEST_MARKER();\r
1295                                         }\r
1296                                 }\r
1297 \r
1298                                 taskEXIT_CRITICAL();\r
1299                                 return pdPASS;\r
1300                         }\r
1301                         else\r
1302                         {\r
1303                                 if( xTicksToWait == ( TickType_t ) 0 )\r
1304                                 {\r
1305                                         /* The queue was empty and no block time is specified (or\r
1306                                         the block time has expired) so leave now. */\r
1307                                         taskEXIT_CRITICAL();\r
1308                                         traceQUEUE_RECEIVE_FAILED( pxQueue );\r
1309                                         return errQUEUE_EMPTY;\r
1310                                 }\r
1311                                 else if( xEntryTimeSet == pdFALSE )\r
1312                                 {\r
1313                                         /* The queue was empty and a block time was specified so\r
1314                                         configure the timeout structure. */\r
1315                                         vTaskSetTimeOutState( &xTimeOut );\r
1316                                         xEntryTimeSet = pdTRUE;\r
1317                                 }\r
1318                                 else\r
1319                                 {\r
1320                                         /* Entry time was already set. */\r
1321                                         mtCOVERAGE_TEST_MARKER();\r
1322                                 }\r
1323                         }\r
1324                 }\r
1325                 taskEXIT_CRITICAL();\r
1326 \r
1327                 /* Interrupts and other tasks can send to and receive from the queue\r
1328                 now the critical section has been exited. */\r
1329 \r
1330                 vTaskSuspendAll();\r
1331                 prvLockQueue( pxQueue );\r
1332 \r
1333                 /* Update the timeout state to see if it has expired yet. */\r
1334                 if( xTaskCheckForTimeOut( &xTimeOut, &xTicksToWait ) == pdFALSE )\r
1335                 {\r
1336                         if( prvIsQueueEmpty( pxQueue ) != pdFALSE )\r
1337                         {\r
1338                                 traceBLOCKING_ON_QUEUE_RECEIVE( pxQueue );\r
1339 \r
1340                                 #if ( configUSE_MUTEXES == 1 )\r
1341                                 {\r
1342                                         if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
1343                                         {\r
1344                                                 taskENTER_CRITICAL();\r
1345                                                 {\r
1346                                                         vTaskPriorityInherit( ( void * ) pxQueue->pxMutexHolder );\r
1347                                                 }\r
1348                                                 taskEXIT_CRITICAL();\r
1349                                         }\r
1350                                         else\r
1351                                         {\r
1352                                                 mtCOVERAGE_TEST_MARKER();\r
1353                                         }\r
1354                                 }\r
1355                                 #endif\r
1356 \r
1357                                 vTaskPlaceOnEventList( &( pxQueue->xTasksWaitingToReceive ), xTicksToWait );\r
1358                                 prvUnlockQueue( pxQueue );\r
1359                                 if( xTaskResumeAll() == pdFALSE )\r
1360                                 {\r
1361                                         portYIELD_WITHIN_API();\r
1362                                 }\r
1363                                 else\r
1364                                 {\r
1365                                         mtCOVERAGE_TEST_MARKER();\r
1366                                 }\r
1367                         }\r
1368                         else\r
1369                         {\r
1370                                 /* Try again. */\r
1371                                 prvUnlockQueue( pxQueue );\r
1372                                 ( void ) xTaskResumeAll();\r
1373                         }\r
1374                 }\r
1375                 else\r
1376                 {\r
1377                         prvUnlockQueue( pxQueue );\r
1378                         ( void ) xTaskResumeAll();\r
1379                         traceQUEUE_RECEIVE_FAILED( pxQueue );\r
1380                         return errQUEUE_EMPTY;\r
1381                 }\r
1382         }\r
1383 }\r
1384 /*-----------------------------------------------------------*/\r
1385 \r
1386 BaseType_t xQueueReceiveFromISR( QueueHandle_t xQueue, void * const pvBuffer, BaseType_t * const pxHigherPriorityTaskWoken )\r
1387 {\r
1388 BaseType_t xReturn;\r
1389 UBaseType_t uxSavedInterruptStatus;\r
1390 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1391 \r
1392         configASSERT( pxQueue );\r
1393         configASSERT( !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
1394 \r
1395         /* RTOS ports that support interrupt nesting have the concept of a maximum\r
1396         system call (or maximum API call) interrupt priority.  Interrupts that are\r
1397         above the maximum system call priority are kept permanently enabled, even\r
1398         when the RTOS kernel is in a critical section, but cannot make any calls to\r
1399         FreeRTOS API functions.  If configASSERT() is defined in FreeRTOSConfig.h\r
1400         then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion\r
1401         failure if a FreeRTOS API function is called from an interrupt that has been\r
1402         assigned a priority above the configured maximum system call priority.\r
1403         Only FreeRTOS functions that end in FromISR can be called from interrupts\r
1404         that have been assigned a priority at or (logically) below the maximum\r
1405         system call     interrupt priority.  FreeRTOS maintains a separate interrupt\r
1406         safe API to ensure interrupt entry is as fast and as simple as possible.\r
1407         More information (albeit Cortex-M specific) is provided on the following\r
1408         link: http://www.freertos.org/RTOS-Cortex-M3-M4.html */\r
1409         portASSERT_IF_INTERRUPT_PRIORITY_INVALID();\r
1410 \r
1411         uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();\r
1412         {\r
1413                 /* Cannot block in an ISR, so check there is data available. */\r
1414                 if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
1415                 {\r
1416                         traceQUEUE_RECEIVE_FROM_ISR( pxQueue );\r
1417 \r
1418                         prvCopyDataFromQueue( pxQueue, pvBuffer );\r
1419                         --( pxQueue->uxMessagesWaiting );\r
1420 \r
1421                         /* If the queue is locked the event list will not be modified.\r
1422                         Instead update the lock count so the task that unlocks the queue\r
1423                         will know that an ISR has removed data while the queue was\r
1424                         locked. */\r
1425                         if( pxQueue->xRxLock == queueUNLOCKED )\r
1426                         {\r
1427                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
1428                                 {\r
1429                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) != pdFALSE )\r
1430                                         {\r
1431                                                 /* The task waiting has a higher priority than us so\r
1432                                                 force a context switch. */\r
1433                                                 if( pxHigherPriorityTaskWoken != NULL )\r
1434                                                 {\r
1435                                                         *pxHigherPriorityTaskWoken = pdTRUE;\r
1436                                                 }\r
1437                                                 else\r
1438                                                 {\r
1439                                                         mtCOVERAGE_TEST_MARKER();\r
1440                                                 }\r
1441                                         }\r
1442                                         else\r
1443                                         {\r
1444                                                 mtCOVERAGE_TEST_MARKER();\r
1445                                         }\r
1446                                 }\r
1447                                 else\r
1448                                 {\r
1449                                         mtCOVERAGE_TEST_MARKER();\r
1450                                 }\r
1451                         }\r
1452                         else\r
1453                         {\r
1454                                 /* Increment the lock count so the task that unlocks the queue\r
1455                                 knows that data was removed while it was locked. */\r
1456                                 ++( pxQueue->xRxLock );\r
1457                         }\r
1458 \r
1459                         xReturn = pdPASS;\r
1460                 }\r
1461                 else\r
1462                 {\r
1463                         xReturn = pdFAIL;\r
1464                         traceQUEUE_RECEIVE_FROM_ISR_FAILED( pxQueue );\r
1465                 }\r
1466         }\r
1467         portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );\r
1468 \r
1469         return xReturn;\r
1470 }\r
1471 /*-----------------------------------------------------------*/\r
1472 \r
1473 BaseType_t xQueuePeekFromISR( QueueHandle_t xQueue,  void * const pvBuffer )\r
1474 {\r
1475 BaseType_t xReturn;\r
1476 UBaseType_t uxSavedInterruptStatus;\r
1477 int8_t *pcOriginalReadPosition;\r
1478 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1479 \r
1480         configASSERT( pxQueue );\r
1481         configASSERT( !( ( pvBuffer == NULL ) && ( pxQueue->uxItemSize != ( UBaseType_t ) 0U ) ) );\r
1482 \r
1483         /* RTOS ports that support interrupt nesting have the concept of a maximum\r
1484         system call (or maximum API call) interrupt priority.  Interrupts that are\r
1485         above the maximum system call priority are kept permanently enabled, even\r
1486         when the RTOS kernel is in a critical section, but cannot make any calls to\r
1487         FreeRTOS API functions.  If configASSERT() is defined in FreeRTOSConfig.h\r
1488         then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion\r
1489         failure if a FreeRTOS API function is called from an interrupt that has been\r
1490         assigned a priority above the configured maximum system call priority.\r
1491         Only FreeRTOS functions that end in FromISR can be called from interrupts\r
1492         that have been assigned a priority at or (logically) below the maximum\r
1493         system call     interrupt priority.  FreeRTOS maintains a separate interrupt\r
1494         safe API to ensure interrupt entry is as fast and as simple as possible.\r
1495         More information (albeit Cortex-M specific) is provided on the following\r
1496         link: http://www.freertos.org/RTOS-Cortex-M3-M4.html */\r
1497         portASSERT_IF_INTERRUPT_PRIORITY_INVALID();\r
1498 \r
1499         uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();\r
1500         {\r
1501                 /* Cannot block in an ISR, so check there is data available. */\r
1502                 if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
1503                 {\r
1504                         traceQUEUE_PEEK_FROM_ISR( pxQueue );\r
1505 \r
1506                         /* Remember the read position so it can be reset as nothing is\r
1507                         actually being removed from the queue. */\r
1508                         pcOriginalReadPosition = pxQueue->u.pcReadFrom;\r
1509                         prvCopyDataFromQueue( pxQueue, pvBuffer );\r
1510                         pxQueue->u.pcReadFrom = pcOriginalReadPosition;\r
1511 \r
1512                         xReturn = pdPASS;\r
1513                 }\r
1514                 else\r
1515                 {\r
1516                         xReturn = pdFAIL;\r
1517                         traceQUEUE_PEEK_FROM_ISR_FAILED( pxQueue );\r
1518                 }\r
1519         }\r
1520         portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );\r
1521 \r
1522         return xReturn;\r
1523 }\r
1524 /*-----------------------------------------------------------*/\r
1525 \r
1526 UBaseType_t uxQueueMessagesWaiting( const QueueHandle_t xQueue )\r
1527 {\r
1528 UBaseType_t uxReturn;\r
1529 \r
1530         configASSERT( xQueue );\r
1531 \r
1532         taskENTER_CRITICAL();\r
1533         {\r
1534                 uxReturn = ( ( Queue_t * ) xQueue )->uxMessagesWaiting;\r
1535         }\r
1536         taskEXIT_CRITICAL();\r
1537 \r
1538         return uxReturn;\r
1539 } /*lint !e818 Pointer cannot be declared const as xQueue is a typedef not pointer. */\r
1540 /*-----------------------------------------------------------*/\r
1541 \r
1542 UBaseType_t uxQueueSpacesAvailable( const QueueHandle_t xQueue )\r
1543 {\r
1544 UBaseType_t uxReturn;\r
1545 Queue_t *pxQueue;\r
1546 \r
1547         pxQueue = ( Queue_t * ) xQueue;\r
1548         configASSERT( pxQueue );\r
1549 \r
1550         taskENTER_CRITICAL();\r
1551         {\r
1552                 uxReturn = pxQueue->uxLength - pxQueue->uxMessagesWaiting;\r
1553         }\r
1554         taskEXIT_CRITICAL();\r
1555 \r
1556         return uxReturn;\r
1557 } /*lint !e818 Pointer cannot be declared const as xQueue is a typedef not pointer. */\r
1558 /*-----------------------------------------------------------*/\r
1559 \r
1560 UBaseType_t uxQueueMessagesWaitingFromISR( const QueueHandle_t xQueue )\r
1561 {\r
1562 UBaseType_t uxReturn;\r
1563 \r
1564         configASSERT( xQueue );\r
1565 \r
1566         uxReturn = ( ( Queue_t * ) xQueue )->uxMessagesWaiting;\r
1567 \r
1568         return uxReturn;\r
1569 } /*lint !e818 Pointer cannot be declared const as xQueue is a typedef not pointer. */\r
1570 /*-----------------------------------------------------------*/\r
1571 \r
1572 void vQueueDelete( QueueHandle_t xQueue )\r
1573 {\r
1574 Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1575 \r
1576         configASSERT( pxQueue );\r
1577 \r
1578         traceQUEUE_DELETE( pxQueue );\r
1579         #if ( configQUEUE_REGISTRY_SIZE > 0 )\r
1580         {\r
1581                 vQueueUnregisterQueue( pxQueue );\r
1582         }\r
1583         #endif\r
1584         if( pxQueue->pcHead != NULL )\r
1585         {\r
1586                 vPortFree( pxQueue->pcHead );\r
1587         }\r
1588         vPortFree( pxQueue );\r
1589 }\r
1590 /*-----------------------------------------------------------*/\r
1591 \r
1592 #if ( configUSE_TRACE_FACILITY == 1 )\r
1593 \r
1594         UBaseType_t uxQueueGetQueueNumber( QueueHandle_t xQueue )\r
1595         {\r
1596                 return ( ( Queue_t * ) xQueue )->uxQueueNumber;\r
1597         }\r
1598 \r
1599 #endif /* configUSE_TRACE_FACILITY */\r
1600 /*-----------------------------------------------------------*/\r
1601 \r
1602 #if ( configUSE_TRACE_FACILITY == 1 )\r
1603 \r
1604         void vQueueSetQueueNumber( QueueHandle_t xQueue, UBaseType_t uxQueueNumber )\r
1605         {\r
1606                 ( ( Queue_t * ) xQueue )->uxQueueNumber = uxQueueNumber;\r
1607         }\r
1608 \r
1609 #endif /* configUSE_TRACE_FACILITY */\r
1610 /*-----------------------------------------------------------*/\r
1611 \r
1612 #if ( configUSE_TRACE_FACILITY == 1 )\r
1613 \r
1614         uint8_t ucQueueGetQueueType( QueueHandle_t xQueue )\r
1615         {\r
1616                 return ( ( Queue_t * ) xQueue )->ucQueueType;\r
1617         }\r
1618 \r
1619 #endif /* configUSE_TRACE_FACILITY */\r
1620 /*-----------------------------------------------------------*/\r
1621 \r
1622 static BaseType_t prvCopyDataToQueue( Queue_t * const pxQueue, const void *pvItemToQueue, const BaseType_t xPosition )\r
1623 {\r
1624 BaseType_t xReturn = pdFALSE;\r
1625 \r
1626         if( pxQueue->uxItemSize == ( UBaseType_t ) 0 )\r
1627         {\r
1628                 #if ( configUSE_MUTEXES == 1 )\r
1629                 {\r
1630                         if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )\r
1631                         {\r
1632                                 /* The mutex is no longer being held. */\r
1633                                 xReturn = xTaskPriorityDisinherit( ( void * ) pxQueue->pxMutexHolder );\r
1634                                 pxQueue->pxMutexHolder = NULL;\r
1635                         }\r
1636                         else\r
1637                         {\r
1638                                 mtCOVERAGE_TEST_MARKER();\r
1639                         }\r
1640                 }\r
1641                 #endif /* configUSE_MUTEXES */\r
1642         }\r
1643         else if( xPosition == queueSEND_TO_BACK )\r
1644         {\r
1645                 ( 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
1646                 pxQueue->pcWriteTo += pxQueue->uxItemSize;\r
1647                 if( pxQueue->pcWriteTo >= pxQueue->pcTail ) /*lint !e946 MISRA exception justified as comparison of pointers is the cleanest solution. */\r
1648                 {\r
1649                         pxQueue->pcWriteTo = pxQueue->pcHead;\r
1650                 }\r
1651                 else\r
1652                 {\r
1653                         mtCOVERAGE_TEST_MARKER();\r
1654                 }\r
1655         }\r
1656         else\r
1657         {\r
1658                 ( 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
1659                 pxQueue->u.pcReadFrom -= pxQueue->uxItemSize;\r
1660                 if( pxQueue->u.pcReadFrom < pxQueue->pcHead ) /*lint !e946 MISRA exception justified as comparison of pointers is the cleanest solution. */\r
1661                 {\r
1662                         pxQueue->u.pcReadFrom = ( pxQueue->pcTail - pxQueue->uxItemSize );\r
1663                 }\r
1664                 else\r
1665                 {\r
1666                         mtCOVERAGE_TEST_MARKER();\r
1667                 }\r
1668 \r
1669                 if( xPosition == queueOVERWRITE )\r
1670                 {\r
1671                         if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
1672                         {\r
1673                                 /* An item is not being added but overwritten, so subtract\r
1674                                 one from the recorded number of items in the queue so when\r
1675                                 one is added again below the number of recorded items remains\r
1676                                 correct. */\r
1677                                 --( pxQueue->uxMessagesWaiting );\r
1678                         }\r
1679                         else\r
1680                         {\r
1681                                 mtCOVERAGE_TEST_MARKER();\r
1682                         }\r
1683                 }\r
1684                 else\r
1685                 {\r
1686                         mtCOVERAGE_TEST_MARKER();\r
1687                 }\r
1688         }\r
1689 \r
1690         ++( pxQueue->uxMessagesWaiting );\r
1691 \r
1692         return xReturn;\r
1693 }\r
1694 /*-----------------------------------------------------------*/\r
1695 \r
1696 static void prvCopyDataFromQueue( Queue_t * const pxQueue, void * const pvBuffer )\r
1697 {\r
1698         if( pxQueue->uxItemSize != ( UBaseType_t ) 0 )\r
1699         {\r
1700                 pxQueue->u.pcReadFrom += pxQueue->uxItemSize;\r
1701                 if( pxQueue->u.pcReadFrom >= pxQueue->pcTail ) /*lint !e946 MISRA exception justified as use of the relational operator is the cleanest solutions. */\r
1702                 {\r
1703                         pxQueue->u.pcReadFrom = pxQueue->pcHead;\r
1704                 }\r
1705                 else\r
1706                 {\r
1707                         mtCOVERAGE_TEST_MARKER();\r
1708                 }\r
1709                 ( 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
1710         }\r
1711 }\r
1712 /*-----------------------------------------------------------*/\r
1713 \r
1714 static void prvUnlockQueue( Queue_t * const pxQueue )\r
1715 {\r
1716         /* THIS FUNCTION MUST BE CALLED WITH THE SCHEDULER SUSPENDED. */\r
1717 \r
1718         /* The lock counts contains the number of extra data items placed or\r
1719         removed from the queue while the queue was locked.  When a queue is\r
1720         locked items can be added or removed, but the event lists cannot be\r
1721         updated. */\r
1722         taskENTER_CRITICAL();\r
1723         {\r
1724                 /* See if data was added to the queue while it was locked. */\r
1725                 while( pxQueue->xTxLock > queueLOCKED_UNMODIFIED )\r
1726                 {\r
1727                         /* Data was posted while the queue was locked.  Are any tasks\r
1728                         blocked waiting for data to become available? */\r
1729                         #if ( configUSE_QUEUE_SETS == 1 )\r
1730                         {\r
1731                                 if( pxQueue->pxQueueSetContainer != NULL )\r
1732                                 {\r
1733                                         if( prvNotifyQueueSetContainer( pxQueue, queueSEND_TO_BACK ) == pdTRUE )\r
1734                                         {\r
1735                                                 /* The queue is a member of a queue set, and posting to\r
1736                                                 the queue set caused a higher priority task to unblock.\r
1737                                                 A context switch is required. */\r
1738                                                 vTaskMissedYield();\r
1739                                         }\r
1740                                         else\r
1741                                         {\r
1742                                                 mtCOVERAGE_TEST_MARKER();\r
1743                                         }\r
1744                                 }\r
1745                                 else\r
1746                                 {\r
1747                                         /* Tasks that are removed from the event list will get added to\r
1748                                         the pending ready list as the scheduler is still suspended. */\r
1749                                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1750                                         {\r
1751                                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1752                                                 {\r
1753                                                         /* The task waiting has a higher priority so record that a\r
1754                                                         context switch is required. */\r
1755                                                         vTaskMissedYield();\r
1756                                                 }\r
1757                                                 else\r
1758                                                 {\r
1759                                                         mtCOVERAGE_TEST_MARKER();\r
1760                                                 }\r
1761                                         }\r
1762                                         else\r
1763                                         {\r
1764                                                 break;\r
1765                                         }\r
1766                                 }\r
1767                         }\r
1768                         #else /* configUSE_QUEUE_SETS */\r
1769                         {\r
1770                                 /* Tasks that are removed from the event list will get added to\r
1771                                 the pending ready list as the scheduler is still suspended. */\r
1772                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1773                                 {\r
1774                                         if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1775                                         {\r
1776                                                 /* The task waiting has a higher priority so record that a\r
1777                                                 context switch is required. */\r
1778                                                 vTaskMissedYield();\r
1779                                         }\r
1780                                         else\r
1781                                         {\r
1782                                                 mtCOVERAGE_TEST_MARKER();\r
1783                                         }\r
1784                                 }\r
1785                                 else\r
1786                                 {\r
1787                                         break;\r
1788                                 }\r
1789                         }\r
1790                         #endif /* configUSE_QUEUE_SETS */\r
1791 \r
1792                         --( pxQueue->xTxLock );\r
1793                 }\r
1794 \r
1795                 pxQueue->xTxLock = queueUNLOCKED;\r
1796         }\r
1797         taskEXIT_CRITICAL();\r
1798 \r
1799         /* Do the same for the Rx lock. */\r
1800         taskENTER_CRITICAL();\r
1801         {\r
1802                 while( pxQueue->xRxLock > queueLOCKED_UNMODIFIED )\r
1803                 {\r
1804                         if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
1805                         {\r
1806                                 if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) != pdFALSE )\r
1807                                 {\r
1808                                         vTaskMissedYield();\r
1809                                 }\r
1810                                 else\r
1811                                 {\r
1812                                         mtCOVERAGE_TEST_MARKER();\r
1813                                 }\r
1814 \r
1815                                 --( pxQueue->xRxLock );\r
1816                         }\r
1817                         else\r
1818                         {\r
1819                                 break;\r
1820                         }\r
1821                 }\r
1822 \r
1823                 pxQueue->xRxLock = queueUNLOCKED;\r
1824         }\r
1825         taskEXIT_CRITICAL();\r
1826 }\r
1827 /*-----------------------------------------------------------*/\r
1828 \r
1829 static BaseType_t prvIsQueueEmpty( const Queue_t *pxQueue )\r
1830 {\r
1831 BaseType_t xReturn;\r
1832 \r
1833         taskENTER_CRITICAL();\r
1834         {\r
1835                 if( pxQueue->uxMessagesWaiting == ( UBaseType_t )  0 )\r
1836                 {\r
1837                         xReturn = pdTRUE;\r
1838                 }\r
1839                 else\r
1840                 {\r
1841                         xReturn = pdFALSE;\r
1842                 }\r
1843         }\r
1844         taskEXIT_CRITICAL();\r
1845 \r
1846         return xReturn;\r
1847 }\r
1848 /*-----------------------------------------------------------*/\r
1849 \r
1850 BaseType_t xQueueIsQueueEmptyFromISR( const QueueHandle_t xQueue )\r
1851 {\r
1852 BaseType_t xReturn;\r
1853 \r
1854         configASSERT( xQueue );\r
1855         if( ( ( Queue_t * ) xQueue )->uxMessagesWaiting == ( UBaseType_t ) 0 )\r
1856         {\r
1857                 xReturn = pdTRUE;\r
1858         }\r
1859         else\r
1860         {\r
1861                 xReturn = pdFALSE;\r
1862         }\r
1863 \r
1864         return xReturn;\r
1865 } /*lint !e818 xQueue could not be pointer to const because it is a typedef. */\r
1866 /*-----------------------------------------------------------*/\r
1867 \r
1868 static BaseType_t prvIsQueueFull( const Queue_t *pxQueue )\r
1869 {\r
1870 BaseType_t xReturn;\r
1871 \r
1872         taskENTER_CRITICAL();\r
1873         {\r
1874                 if( pxQueue->uxMessagesWaiting == pxQueue->uxLength )\r
1875                 {\r
1876                         xReturn = pdTRUE;\r
1877                 }\r
1878                 else\r
1879                 {\r
1880                         xReturn = pdFALSE;\r
1881                 }\r
1882         }\r
1883         taskEXIT_CRITICAL();\r
1884 \r
1885         return xReturn;\r
1886 }\r
1887 /*-----------------------------------------------------------*/\r
1888 \r
1889 BaseType_t xQueueIsQueueFullFromISR( const QueueHandle_t xQueue )\r
1890 {\r
1891 BaseType_t xReturn;\r
1892 \r
1893         configASSERT( xQueue );\r
1894         if( ( ( Queue_t * ) xQueue )->uxMessagesWaiting == ( ( Queue_t * ) xQueue )->uxLength )\r
1895         {\r
1896                 xReturn = pdTRUE;\r
1897         }\r
1898         else\r
1899         {\r
1900                 xReturn = pdFALSE;\r
1901         }\r
1902 \r
1903         return xReturn;\r
1904 } /*lint !e818 xQueue could not be pointer to const because it is a typedef. */\r
1905 /*-----------------------------------------------------------*/\r
1906 \r
1907 #if ( configUSE_CO_ROUTINES == 1 )\r
1908 \r
1909         BaseType_t xQueueCRSend( QueueHandle_t xQueue, const void *pvItemToQueue, TickType_t xTicksToWait )\r
1910         {\r
1911         BaseType_t xReturn;\r
1912         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1913 \r
1914                 /* If the queue is already full we may have to block.  A critical section\r
1915                 is required to prevent an interrupt removing something from the queue\r
1916                 between the check to see if the queue is full and blocking on the queue. */\r
1917                 portDISABLE_INTERRUPTS();\r
1918                 {\r
1919                         if( prvIsQueueFull( pxQueue ) != pdFALSE )\r
1920                         {\r
1921                                 /* The queue is full - do we want to block or just leave without\r
1922                                 posting? */\r
1923                                 if( xTicksToWait > ( TickType_t ) 0 )\r
1924                                 {\r
1925                                         /* As this is called from a coroutine we cannot block directly, but\r
1926                                         return indicating that we need to block. */\r
1927                                         vCoRoutineAddToDelayedList( xTicksToWait, &( pxQueue->xTasksWaitingToSend ) );\r
1928                                         portENABLE_INTERRUPTS();\r
1929                                         return errQUEUE_BLOCKED;\r
1930                                 }\r
1931                                 else\r
1932                                 {\r
1933                                         portENABLE_INTERRUPTS();\r
1934                                         return errQUEUE_FULL;\r
1935                                 }\r
1936                         }\r
1937                 }\r
1938                 portENABLE_INTERRUPTS();\r
1939 \r
1940                 portDISABLE_INTERRUPTS();\r
1941                 {\r
1942                         if( pxQueue->uxMessagesWaiting < pxQueue->uxLength )\r
1943                         {\r
1944                                 /* There is room in the queue, copy the data into the queue. */\r
1945                                 prvCopyDataToQueue( pxQueue, pvItemToQueue, queueSEND_TO_BACK );\r
1946                                 xReturn = pdPASS;\r
1947 \r
1948                                 /* Were any co-routines waiting for data to become available? */\r
1949                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
1950                                 {\r
1951                                         /* In this instance the co-routine could be placed directly\r
1952                                         into the ready list as we are within a critical section.\r
1953                                         Instead the same pending ready list mechanism is used as if\r
1954                                         the event were caused from within an interrupt. */\r
1955                                         if( xCoRoutineRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
1956                                         {\r
1957                                                 /* The co-routine waiting has a higher priority so record\r
1958                                                 that a yield might be appropriate. */\r
1959                                                 xReturn = errQUEUE_YIELD;\r
1960                                         }\r
1961                                         else\r
1962                                         {\r
1963                                                 mtCOVERAGE_TEST_MARKER();\r
1964                                         }\r
1965                                 }\r
1966                                 else\r
1967                                 {\r
1968                                         mtCOVERAGE_TEST_MARKER();\r
1969                                 }\r
1970                         }\r
1971                         else\r
1972                         {\r
1973                                 xReturn = errQUEUE_FULL;\r
1974                         }\r
1975                 }\r
1976                 portENABLE_INTERRUPTS();\r
1977 \r
1978                 return xReturn;\r
1979         }\r
1980 \r
1981 #endif /* configUSE_CO_ROUTINES */\r
1982 /*-----------------------------------------------------------*/\r
1983 \r
1984 #if ( configUSE_CO_ROUTINES == 1 )\r
1985 \r
1986         BaseType_t xQueueCRReceive( QueueHandle_t xQueue, void *pvBuffer, TickType_t xTicksToWait )\r
1987         {\r
1988         BaseType_t xReturn;\r
1989         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
1990 \r
1991                 /* If the queue is already empty we may have to block.  A critical section\r
1992                 is required to prevent an interrupt adding something to the queue\r
1993                 between the check to see if the queue is empty and blocking on the queue. */\r
1994                 portDISABLE_INTERRUPTS();\r
1995                 {\r
1996                         if( pxQueue->uxMessagesWaiting == ( UBaseType_t ) 0 )\r
1997                         {\r
1998                                 /* There are no messages in the queue, do we want to block or just\r
1999                                 leave with nothing? */\r
2000                                 if( xTicksToWait > ( TickType_t ) 0 )\r
2001                                 {\r
2002                                         /* As this is a co-routine we cannot block directly, but return\r
2003                                         indicating that we need to block. */\r
2004                                         vCoRoutineAddToDelayedList( xTicksToWait, &( pxQueue->xTasksWaitingToReceive ) );\r
2005                                         portENABLE_INTERRUPTS();\r
2006                                         return errQUEUE_BLOCKED;\r
2007                                 }\r
2008                                 else\r
2009                                 {\r
2010                                         portENABLE_INTERRUPTS();\r
2011                                         return errQUEUE_FULL;\r
2012                                 }\r
2013                         }\r
2014                         else\r
2015                         {\r
2016                                 mtCOVERAGE_TEST_MARKER();\r
2017                         }\r
2018                 }\r
2019                 portENABLE_INTERRUPTS();\r
2020 \r
2021                 portDISABLE_INTERRUPTS();\r
2022                 {\r
2023                         if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
2024                         {\r
2025                                 /* Data is available from the queue. */\r
2026                                 pxQueue->u.pcReadFrom += pxQueue->uxItemSize;\r
2027                                 if( pxQueue->u.pcReadFrom >= pxQueue->pcTail )\r
2028                                 {\r
2029                                         pxQueue->u.pcReadFrom = pxQueue->pcHead;\r
2030                                 }\r
2031                                 else\r
2032                                 {\r
2033                                         mtCOVERAGE_TEST_MARKER();\r
2034                                 }\r
2035                                 --( pxQueue->uxMessagesWaiting );\r
2036                                 ( void ) memcpy( ( void * ) pvBuffer, ( void * ) pxQueue->u.pcReadFrom, ( unsigned ) pxQueue->uxItemSize );\r
2037 \r
2038                                 xReturn = pdPASS;\r
2039 \r
2040                                 /* Were any co-routines waiting for space to become available? */\r
2041                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
2042                                 {\r
2043                                         /* In this instance the co-routine could be placed directly\r
2044                                         into the ready list as we are within a critical section.\r
2045                                         Instead the same pending ready list mechanism is used as if\r
2046                                         the event were caused from within an interrupt. */\r
2047                                         if( xCoRoutineRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) != pdFALSE )\r
2048                                         {\r
2049                                                 xReturn = errQUEUE_YIELD;\r
2050                                         }\r
2051                                         else\r
2052                                         {\r
2053                                                 mtCOVERAGE_TEST_MARKER();\r
2054                                         }\r
2055                                 }\r
2056                                 else\r
2057                                 {\r
2058                                         mtCOVERAGE_TEST_MARKER();\r
2059                                 }\r
2060                         }\r
2061                         else\r
2062                         {\r
2063                                 xReturn = pdFAIL;\r
2064                         }\r
2065                 }\r
2066                 portENABLE_INTERRUPTS();\r
2067 \r
2068                 return xReturn;\r
2069         }\r
2070 \r
2071 #endif /* configUSE_CO_ROUTINES */\r
2072 /*-----------------------------------------------------------*/\r
2073 \r
2074 #if ( configUSE_CO_ROUTINES == 1 )\r
2075 \r
2076         BaseType_t xQueueCRSendFromISR( QueueHandle_t xQueue, const void *pvItemToQueue, BaseType_t xCoRoutinePreviouslyWoken )\r
2077         {\r
2078         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
2079 \r
2080                 /* Cannot block within an ISR so if there is no space on the queue then\r
2081                 exit without doing anything. */\r
2082                 if( pxQueue->uxMessagesWaiting < pxQueue->uxLength )\r
2083                 {\r
2084                         prvCopyDataToQueue( pxQueue, pvItemToQueue, queueSEND_TO_BACK );\r
2085 \r
2086                         /* We only want to wake one co-routine per ISR, so check that a\r
2087                         co-routine has not already been woken. */\r
2088                         if( xCoRoutinePreviouslyWoken == pdFALSE )\r
2089                         {\r
2090                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )\r
2091                                 {\r
2092                                         if( xCoRoutineRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )\r
2093                                         {\r
2094                                                 return pdTRUE;\r
2095                                         }\r
2096                                         else\r
2097                                         {\r
2098                                                 mtCOVERAGE_TEST_MARKER();\r
2099                                         }\r
2100                                 }\r
2101                                 else\r
2102                                 {\r
2103                                         mtCOVERAGE_TEST_MARKER();\r
2104                                 }\r
2105                         }\r
2106                         else\r
2107                         {\r
2108                                 mtCOVERAGE_TEST_MARKER();\r
2109                         }\r
2110                 }\r
2111                 else\r
2112                 {\r
2113                         mtCOVERAGE_TEST_MARKER();\r
2114                 }\r
2115 \r
2116                 return xCoRoutinePreviouslyWoken;\r
2117         }\r
2118 \r
2119 #endif /* configUSE_CO_ROUTINES */\r
2120 /*-----------------------------------------------------------*/\r
2121 \r
2122 #if ( configUSE_CO_ROUTINES == 1 )\r
2123 \r
2124         BaseType_t xQueueCRReceiveFromISR( QueueHandle_t xQueue, void *pvBuffer, BaseType_t *pxCoRoutineWoken )\r
2125         {\r
2126         BaseType_t xReturn;\r
2127         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
2128 \r
2129                 /* We cannot block from an ISR, so check there is data available. If\r
2130                 not then just leave without doing anything. */\r
2131                 if( pxQueue->uxMessagesWaiting > ( UBaseType_t ) 0 )\r
2132                 {\r
2133                         /* Copy the data from the queue. */\r
2134                         pxQueue->u.pcReadFrom += pxQueue->uxItemSize;\r
2135                         if( pxQueue->u.pcReadFrom >= pxQueue->pcTail )\r
2136                         {\r
2137                                 pxQueue->u.pcReadFrom = pxQueue->pcHead;\r
2138                         }\r
2139                         else\r
2140                         {\r
2141                                 mtCOVERAGE_TEST_MARKER();\r
2142                         }\r
2143                         --( pxQueue->uxMessagesWaiting );\r
2144                         ( void ) memcpy( ( void * ) pvBuffer, ( void * ) pxQueue->u.pcReadFrom, ( unsigned ) pxQueue->uxItemSize );\r
2145 \r
2146                         if( ( *pxCoRoutineWoken ) == pdFALSE )\r
2147                         {\r
2148                                 if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToSend ) ) == pdFALSE )\r
2149                                 {\r
2150                                         if( xCoRoutineRemoveFromEventList( &( pxQueue->xTasksWaitingToSend ) ) != pdFALSE )\r
2151                                         {\r
2152                                                 *pxCoRoutineWoken = pdTRUE;\r
2153                                         }\r
2154                                         else\r
2155                                         {\r
2156                                                 mtCOVERAGE_TEST_MARKER();\r
2157                                         }\r
2158                                 }\r
2159                                 else\r
2160                                 {\r
2161                                         mtCOVERAGE_TEST_MARKER();\r
2162                                 }\r
2163                         }\r
2164                         else\r
2165                         {\r
2166                                 mtCOVERAGE_TEST_MARKER();\r
2167                         }\r
2168 \r
2169                         xReturn = pdPASS;\r
2170                 }\r
2171                 else\r
2172                 {\r
2173                         xReturn = pdFAIL;\r
2174                 }\r
2175 \r
2176                 return xReturn;\r
2177         }\r
2178 \r
2179 #endif /* configUSE_CO_ROUTINES */\r
2180 /*-----------------------------------------------------------*/\r
2181 \r
2182 #if ( configQUEUE_REGISTRY_SIZE > 0 )\r
2183 \r
2184         void vQueueAddToRegistry( QueueHandle_t xQueue, const char *pcQueueName ) /*lint !e971 Unqualified char types are allowed for strings and single characters only. */\r
2185         {\r
2186         UBaseType_t ux;\r
2187 \r
2188                 /* See if there is an empty space in the registry.  A NULL name denotes\r
2189                 a free slot. */\r
2190                 for( ux = ( UBaseType_t ) 0U; ux < ( UBaseType_t ) configQUEUE_REGISTRY_SIZE; ux++ )\r
2191                 {\r
2192                         if( xQueueRegistry[ ux ].pcQueueName == NULL )\r
2193                         {\r
2194                                 /* Store the information on this queue. */\r
2195                                 xQueueRegistry[ ux ].pcQueueName = pcQueueName;\r
2196                                 xQueueRegistry[ ux ].xHandle = xQueue;\r
2197 \r
2198                                 traceQUEUE_REGISTRY_ADD( xQueue, pcQueueName );\r
2199                                 break;\r
2200                         }\r
2201                         else\r
2202                         {\r
2203                                 mtCOVERAGE_TEST_MARKER();\r
2204                         }\r
2205                 }\r
2206         }\r
2207 \r
2208 #endif /* configQUEUE_REGISTRY_SIZE */\r
2209 /*-----------------------------------------------------------*/\r
2210 \r
2211 #if ( configQUEUE_REGISTRY_SIZE > 0 )\r
2212 \r
2213         void vQueueUnregisterQueue( QueueHandle_t xQueue )\r
2214         {\r
2215         UBaseType_t ux;\r
2216 \r
2217                 /* See if the handle of the queue being unregistered in actually in the\r
2218                 registry. */\r
2219                 for( ux = ( UBaseType_t ) 0U; ux < ( UBaseType_t ) configQUEUE_REGISTRY_SIZE; ux++ )\r
2220                 {\r
2221                         if( xQueueRegistry[ ux ].xHandle == xQueue )\r
2222                         {\r
2223                                 /* Set the name to NULL to show that this slot if free again. */\r
2224                                 xQueueRegistry[ ux ].pcQueueName = NULL;\r
2225                                 break;\r
2226                         }\r
2227                         else\r
2228                         {\r
2229                                 mtCOVERAGE_TEST_MARKER();\r
2230                         }\r
2231                 }\r
2232 \r
2233         } /*lint !e818 xQueue could not be pointer to const because it is a typedef. */\r
2234 \r
2235 #endif /* configQUEUE_REGISTRY_SIZE */\r
2236 /*-----------------------------------------------------------*/\r
2237 \r
2238 #if ( configUSE_TIMERS == 1 )\r
2239 \r
2240         void vQueueWaitForMessageRestricted( QueueHandle_t xQueue, TickType_t xTicksToWait )\r
2241         {\r
2242         Queue_t * const pxQueue = ( Queue_t * ) xQueue;\r
2243 \r
2244                 /* This function should not be called by application code hence the\r
2245                 'Restricted' in its name.  It is not part of the public API.  It is\r
2246                 designed for use by kernel code, and has special calling requirements.\r
2247                 It can result in vListInsert() being called on a list that can only\r
2248                 possibly ever have one item in it, so the list will be fast, but even\r
2249                 so it should be called with the scheduler locked and not from a critical\r
2250                 section. */\r
2251 \r
2252                 /* Only do anything if there are no messages in the queue.  This function\r
2253                 will not actually cause the task to block, just place it on a blocked\r
2254                 list.  It will not block until the scheduler is unlocked - at which\r
2255                 time a yield will be performed.  If an item is added to the queue while\r
2256                 the queue is locked, and the calling task blocks on the queue, then the\r
2257                 calling task will be immediately unblocked when the queue is unlocked. */\r
2258                 prvLockQueue( pxQueue );\r
2259                 if( pxQueue->uxMessagesWaiting == ( UBaseType_t ) 0U )\r
2260                 {\r
2261                         /* There is nothing in the queue, block for the specified period. */\r
2262                         vTaskPlaceOnEventListRestricted( &( pxQueue->xTasksWaitingToReceive ), xTicksToWait );\r
2263                 }\r
2264                 else\r
2265                 {\r
2266                         mtCOVERAGE_TEST_MARKER();\r
2267                 }\r
2268                 prvUnlockQueue( pxQueue );\r
2269         }\r
2270 \r
2271 #endif /* configUSE_TIMERS */\r
2272 /*-----------------------------------------------------------*/\r
2273 \r
2274 #if ( configUSE_QUEUE_SETS == 1 )\r
2275 \r
2276         QueueSetHandle_t xQueueCreateSet( const UBaseType_t uxEventQueueLength )\r
2277         {\r
2278         QueueSetHandle_t pxQueue;\r
2279 \r
2280                 pxQueue = xQueueGenericCreate( uxEventQueueLength, sizeof( Queue_t * ), queueQUEUE_TYPE_SET );\r
2281 \r
2282                 return pxQueue;\r
2283         }\r
2284 \r
2285 #endif /* configUSE_QUEUE_SETS */\r
2286 /*-----------------------------------------------------------*/\r
2287 \r
2288 #if ( configUSE_QUEUE_SETS == 1 )\r
2289 \r
2290         BaseType_t xQueueAddToSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet )\r
2291         {\r
2292         BaseType_t xReturn;\r
2293 \r
2294                 taskENTER_CRITICAL();\r
2295                 {\r
2296                         if( ( ( Queue_t * ) xQueueOrSemaphore )->pxQueueSetContainer != NULL )\r
2297                         {\r
2298                                 /* Cannot add a queue/semaphore to more than one queue set. */\r
2299                                 xReturn = pdFAIL;\r
2300                         }\r
2301                         else if( ( ( Queue_t * ) xQueueOrSemaphore )->uxMessagesWaiting != ( UBaseType_t ) 0 )\r
2302                         {\r
2303                                 /* Cannot add a queue/semaphore to a queue set if there are already\r
2304                                 items in the queue/semaphore. */\r
2305                                 xReturn = pdFAIL;\r
2306                         }\r
2307                         else\r
2308                         {\r
2309                                 ( ( Queue_t * ) xQueueOrSemaphore )->pxQueueSetContainer = xQueueSet;\r
2310                                 xReturn = pdPASS;\r
2311                         }\r
2312                 }\r
2313                 taskEXIT_CRITICAL();\r
2314 \r
2315                 return xReturn;\r
2316         }\r
2317 \r
2318 #endif /* configUSE_QUEUE_SETS */\r
2319 /*-----------------------------------------------------------*/\r
2320 \r
2321 #if ( configUSE_QUEUE_SETS == 1 )\r
2322 \r
2323         BaseType_t xQueueRemoveFromSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet )\r
2324         {\r
2325         BaseType_t xReturn;\r
2326         Queue_t * const pxQueueOrSemaphore = ( Queue_t * ) xQueueOrSemaphore;\r
2327 \r
2328                 if( pxQueueOrSemaphore->pxQueueSetContainer != xQueueSet )\r
2329                 {\r
2330                         /* The queue was not a member of the set. */\r
2331                         xReturn = pdFAIL;\r
2332                 }\r
2333                 else if( pxQueueOrSemaphore->uxMessagesWaiting != ( UBaseType_t ) 0 )\r
2334                 {\r
2335                         /* It is dangerous to remove a queue from a set when the queue is\r
2336                         not empty because the queue set will still hold pending events for\r
2337                         the queue. */\r
2338                         xReturn = pdFAIL;\r
2339                 }\r
2340                 else\r
2341                 {\r
2342                         taskENTER_CRITICAL();\r
2343                         {\r
2344                                 /* The queue is no longer contained in the set. */\r
2345                                 pxQueueOrSemaphore->pxQueueSetContainer = NULL;\r
2346                         }\r
2347                         taskEXIT_CRITICAL();\r
2348                         xReturn = pdPASS;\r
2349                 }\r
2350 \r
2351                 return xReturn;\r
2352         } /*lint !e818 xQueueSet could not be declared as pointing to const as it is a typedef. */\r
2353 \r
2354 #endif /* configUSE_QUEUE_SETS */\r
2355 /*-----------------------------------------------------------*/\r
2356 \r
2357 #if ( configUSE_QUEUE_SETS == 1 )\r
2358 \r
2359         QueueSetMemberHandle_t xQueueSelectFromSet( QueueSetHandle_t xQueueSet, TickType_t const xTicksToWait )\r
2360         {\r
2361         QueueSetMemberHandle_t xReturn = NULL;\r
2362 \r
2363                 ( void ) xQueueGenericReceive( ( QueueHandle_t ) xQueueSet, &xReturn, xTicksToWait, pdFALSE ); /*lint !e961 Casting from one typedef to another is not redundant. */\r
2364                 return xReturn;\r
2365         }\r
2366 \r
2367 #endif /* configUSE_QUEUE_SETS */\r
2368 /*-----------------------------------------------------------*/\r
2369 \r
2370 #if ( configUSE_QUEUE_SETS == 1 )\r
2371 \r
2372         QueueSetMemberHandle_t xQueueSelectFromSetFromISR( QueueSetHandle_t xQueueSet )\r
2373         {\r
2374         QueueSetMemberHandle_t xReturn = NULL;\r
2375 \r
2376                 ( void ) xQueueReceiveFromISR( ( QueueHandle_t ) xQueueSet, &xReturn, NULL ); /*lint !e961 Casting from one typedef to another is not redundant. */\r
2377                 return xReturn;\r
2378         }\r
2379 \r
2380 #endif /* configUSE_QUEUE_SETS */\r
2381 /*-----------------------------------------------------------*/\r
2382 \r
2383 #if ( configUSE_QUEUE_SETS == 1 )\r
2384 \r
2385         static BaseType_t prvNotifyQueueSetContainer( const Queue_t * const pxQueue, const BaseType_t xCopyPosition )\r
2386         {\r
2387         Queue_t *pxQueueSetContainer = pxQueue->pxQueueSetContainer;\r
2388         BaseType_t xReturn = pdFALSE;\r
2389 \r
2390                 /* This function must be called form a critical section. */\r
2391 \r
2392                 configASSERT( pxQueueSetContainer );\r
2393                 configASSERT( pxQueueSetContainer->uxMessagesWaiting < pxQueueSetContainer->uxLength );\r
2394 \r
2395                 if( pxQueueSetContainer->uxMessagesWaiting < pxQueueSetContainer->uxLength )\r
2396                 {\r
2397                         traceQUEUE_SEND( pxQueueSetContainer );\r
2398                         /* The data copied is the handle of the queue that contains data. */\r
2399                         xReturn = prvCopyDataToQueue( pxQueueSetContainer, &pxQueue, xCopyPosition );\r
2400 \r
2401                         if( listLIST_IS_EMPTY( &( pxQueueSetContainer->xTasksWaitingToReceive ) ) == pdFALSE )\r
2402                         {\r
2403                                 if( xTaskRemoveFromEventList( &( pxQueueSetContainer->xTasksWaitingToReceive ) ) != pdFALSE )\r
2404                                 {\r
2405                                         /* The task waiting has a higher priority */\r
2406                                         xReturn = pdTRUE;\r
2407                                 }\r
2408                                 else\r
2409                                 {\r
2410                                         mtCOVERAGE_TEST_MARKER();\r
2411                                 }\r
2412                         }\r
2413                         else\r
2414                         {\r
2415                                 mtCOVERAGE_TEST_MARKER();\r
2416                         }\r
2417                 }\r
2418                 else\r
2419                 {\r
2420                         mtCOVERAGE_TEST_MARKER();\r
2421                 }\r
2422 \r
2423                 return xReturn;\r
2424         }\r
2425 \r
2426 #endif /* configUSE_QUEUE_SETS */\r
2427 \r
2428 \r
2429 \r
2430 \r
2431 \r
2432 \r
2433 \r
2434 \r
2435 \r
2436 \r
2437 \r
2438 \r