2 * Amazon FreeRTOS Common V1.0.0
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3 * Copyright (C) 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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6 * this software and associated documentation files (the "Software"), to deal in
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7 * the Software without restriction, including without limitation the rights to
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8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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9 * the Software, and to permit persons to whom the Software is furnished to do so,
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10 * subject to the following conditions:
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12 * The above copyright notice and this permission notice shall be included in all
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13 * copies or substantial portions of the Software.
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 * http://aws.amazon.com/freertos
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23 * http://www.FreeRTOS.org
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27 * @file iot_taskpool_internal.h
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28 * @brief Internal header of task pool library. This header should not be included in
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29 * typical application code.
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32 #ifndef IOT_TASKPOOL_INTERNAL_H_
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33 #define IOT_TASKPOOL_INTERNAL_H_
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35 /* The config header is always included first. */
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36 #include "iot_config.h"
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38 /* Task pool include. */
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39 #include "private/iot_error.h"
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40 #include "iot_taskpool.h"
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42 /* FreeRTOS includes. */
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43 #include "FreeRTOS.h"
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47 /* Establish a few convenience macros to handle errors in a standard way. */
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50 * @brief Every public API return an enumeration value with an undelying value of 0 in case of success.
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52 #define TASKPOOL_SUCCEEDED( x ) ( ( x ) == IOT_TASKPOOL_SUCCESS )
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55 * @brief Every public API returns an enumeration value with an undelying value different than 0 in case of success.
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57 #define TASKPOOL_FAILED( x ) ( ( x ) != IOT_TASKPOOL_SUCCESS )
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60 * @brief Jump to the cleanup area.
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62 #define TASKPOOL_GOTO_CLEANUP() IOT_GOTO_CLEANUP()
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65 * @brief Declare the storage for the error status variable.
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67 #define TASKPOOL_FUNCTION_ENTRY( result ) IOT_FUNCTION_ENTRY( IotTaskPoolError_t, result )
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70 * @brief Check error and leave in case of failure.
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72 #define TASKPOOL_ON_ERROR_GOTO_CLEANUP( expr ) \
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73 { if( TASKPOOL_FAILED( status = ( expr ) ) ) { IOT_GOTO_CLEANUP(); } \
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77 * @brief Exit if an argument is NULL.
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79 #define TASKPOOL_ON_NULL_ARG_GOTO_CLEANUP( ptr ) IOT_VALIDATE_PARAMETER( IOT_TASKPOOL, ( ptr != NULL ) )
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82 * @brief Exit if an argument is NULL.
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84 #define TASKPOOL_ON_ARG_ERROR_GOTO_CLEANUP( expr ) IOT_VALIDATE_PARAMETER( IOT_TASKPOOL, ( ( expr ) == false ) )
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87 * @brief Set error and leave.
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89 #define TASKPOOL_SET_AND_GOTO_CLEANUP( expr ) IOT_SET_AND_GOTO_CLEANUP( expr )
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92 * @brief Initialize error and declare start of cleanup area.
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94 #define TASKPOOL_FUNCTION_CLEANUP() IOT_FUNCTION_CLEANUP_BEGIN()
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97 * @brief Initialize error and declare end of cleanup area.
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99 #define TASKPOOL_FUNCTION_CLEANUP_END() IOT_FUNCTION_CLEANUP_END()
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102 * @brief Create an empty cleanup area.
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104 #define TASKPOOL_NO_FUNCTION_CLEANUP() IOT_FUNCTION_EXIT_NO_CLEANUP()
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107 * @brief Does not create a cleanup area.
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109 #define TASKPOOL_NO_FUNCTION_CLEANUP_NOLABEL() return status
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112 * @def IotTaskPool_Assert( expression )
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113 * @brief Assertion macro for the Task pool library.
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115 * Set @ref IOT_TASKPOOL_ENABLE_ASSERTS to `1` to enable assertions in the Task pool
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118 * @param[in] expression Expression to be evaluated.
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120 #if IOT_TASKPOOL_ENABLE_ASSERTS == 1
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121 #ifndef IotTaskPool_Assert
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122 #include <assert.h>
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123 #define IotTaskPool_Assert( expression ) assert( expression )
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126 #define IotTaskPool_Assert( expression )
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129 /* Configure logs for TASKPOOL functions. */
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130 #ifdef IOT_LOG_LEVEL_TASKPOOL
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131 #define LIBRARY_LOG_LEVEL IOT_LOG_LEVEL_TASKPOOL
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133 #ifdef IOT_LOG_LEVEL_GLOBAL
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134 #define LIBRARY_LOG_LEVEL IOT_LOG_LEVEL_GLOBAL
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136 #define LIBRARY_LOG_LEVEL IOT_LOG_NONE
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140 #define LIBRARY_LOG_NAME ( "TASKPOOL" )
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141 #include "iot_logging_setup.h"
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144 * Provide default values for undefined memory allocation functions based on
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145 * the usage of dynamic memory allocation.
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147 #if IOT_STATIC_MEMORY_ONLY == 1
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148 #include "private/iot_static_memory.h"
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151 * @brief Allocate an #_taskPool_t. This function should have the
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152 * same signature as [malloc].
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154 void * IotTaskPool_MallocTaskPool( size_t size );
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157 * @brief Free an #_taskPool_t. This function should have the
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158 * same signature as [malloc].
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160 void IotTaskPool_FreeTaskPool( void * ptr );
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163 * @brief Allocate an #IotTaskPoolJob_t. This function should have the
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164 * same signature as [malloc].
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166 void * IotTaskPool_MallocJob( size_t size );
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169 * @brief Free an #IotTaskPoolJob_t. This function should have the same
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170 * same signature as [malloc].
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171 * (http://pubs.opengroup.org/onlinepubs/9699919799/functions/malloc.html).
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173 void IotTaskPool_FreeJob( void * ptr );
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176 * @brief Allocate an #_taskPoolTimerEvent_t. This function should have the
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177 * same signature as [malloc].
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179 void * IotTaskPool_MallocTimerEvent( size_t size );
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182 * @brief Free an #_taskPoolTimerEvent_t. This function should have the
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183 * same signature as[ free ].
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185 void IotTaskPool_FreeTimerEvent( void * ptr );
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187 #else /* if IOT_STATIC_MEMORY_ONLY == 1 */
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188 #include <stdlib.h>
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190 #ifndef IotTaskPool_MallocTaskPool
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191 #define IotTaskPool_MallocTaskPool malloc
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194 #ifndef IotTaskPool_FreeTaskPool
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195 #define IotTaskPool_FreeTaskPool free
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198 #ifndef IotTaskPool_MallocJob
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199 #define IotTaskPool_MallocJob malloc
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202 #ifndef IotTaskPool_FreeJob
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203 #define IotTaskPool_FreeJob free
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206 #ifndef IotTaskPool_MallocTimerEvent
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207 #define IotTaskPool_MallocTimerEvent malloc
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210 #ifndef IotTaskPool_FreeTimerEvent
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211 #define IotTaskPool_FreeTimerEvent free
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214 #endif /* if IOT_STATIC_MEMORY_ONLY == 1 */
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216 /* ---------------------------------------------------------------------------------------------- */
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219 * @cond DOXYGEN_IGNORE
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220 * Doxygen should ignore this section.
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222 * A macros to manage task pool memory allocation.
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224 #define IOT_TASK_POOL_INTERNAL_STATIC ( ( uint32_t ) 0x00000001 ) /* Flag to mark a job as user-allocated. */
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228 * @brief Task pool jobs cache.
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230 * @warning This is a system-level data type that should not be modified or used directly in any application.
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231 * @warning This is a system-level data type that can and will change across different versions of the platform, with no regards for backward compatibility.
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234 typedef struct _taskPoolCache
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236 IotListDouble_t freeList; /**< @brief A list ot hold cached jobs. */
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238 uint32_t freeCount; /**< @brief A counter to track the number of jobs in the cache. */
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239 } _taskPoolCache_t;
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242 * @brief The task pool data structure keeps track of the internal state and the signals for the dispatcher threads.
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243 * The task pool is a thread safe data structure.
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245 * @warning This is a system-level data type that should not be modified or used directly in any application.
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246 * @warning This is a system-level data type that can and will change across different versions of the platform, with no regards for backward compatibility.
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249 typedef struct _taskPool
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251 IotDeQueue_t dispatchQueue; /**< @brief The queue for the jobs waiting to be executed. */
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252 IotListDouble_t timerEventsList; /**< @brief The timeouts queue for all deferred jobs waiting to be executed. */
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253 _taskPoolCache_t jobsCache; /**< @brief A cache to re-use jobs in order to limit memory allocations. */
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254 uint32_t activeThreads; /**< @brief The number of threads in the task pool at any given time. */
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255 int32_t priority; /**< @brief The priority for all task pool threads. */
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256 SemaphoreHandle_t dispatchSignal; /**< @brief The synchronization object on which threads are waiting for incoming jobs. */
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257 StaticSemaphore_t dispatchSignalBuffer; /**< @brief The semaphore buffer. */
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258 StaticSemaphore_t startStopSignalBuffer; /**< @brief The semaphore buffer. */
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259 TimerHandle_t timer; /**< @brief The timer for deferred jobs. */
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260 StaticTimer_t timerBuffer; /**< @brief The timer buffer. */
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261 bool running; /**< @brief A flag to track whether the task pool is operational or should shut down. */
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265 * @brief The job data structure keeps track of the user callback and context, as well as the status of the job.
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267 * @warning This is a system-level data type that should not be modified or used directly in any application.
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268 * @warning This is a system-level data type that can and will change across different versions of the platform, with no regards for backward compatibility.
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271 typedef struct _taskPoolJob
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273 IotLink_t link; /**< @brief The link to insert the job in the dispatch queue. */
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274 IotTaskPoolRoutine_t userCallback; /**< @brief The user provided callback. */
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275 void * pUserContext; /**< @brief The user provided context. */
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276 uint32_t flags; /**< @brief Internal flags. */
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277 IotTaskPoolJobStatus_t status; /**< @brief The status for the job. */
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281 * @brief Represents an operation that is subject to a timer.
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283 * These events are queued per MQTT connection. They are sorted by their
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286 typedef struct _taskPoolTimerEvent
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288 IotLink_t link; /**< @brief List link member. */
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289 TickType_t expirationTime; /**< @brief When this event should be processed. */
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290 IotTaskPoolJob_t job; /**< @brief The task pool job associated with this event. */
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291 } _taskPoolTimerEvent_t;
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293 #endif /* ifndef IOT_TASKPOOL_INTERNAL_H_ */