forked from epagris/FreeRTOS-Kernel
Continue to add the ability to create RTOS objects using static rather than dynamic memory allocation - now including all the semaphore types.
Update the StaticAllocation.c standard demo file to exercise the new static allocation functions.
This commit is contained in:
Richard Barry
parent
cf0ed4e2ac
commit
68fced741d
@ -145,6 +145,28 @@ static void prvCreateAndDeleteStaticallyAllocatedQueues( void );
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*/
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static void prvCreateAndDeleteStaticallyAllocatedBinarySemaphores( void );
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/*
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* A function that demonstrates and tests the xSemaphoreCreateMutexStatic() API
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* macro by creating and then deleting mutexes with both dynamically and
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* statically allocated semaphore structures.
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*/
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static void prvCreateAndDeleteStaticallyAllocatedMutexes( void );
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/*
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* A function that demonstrates and tests the xSemaphoreCreateCountingStatic()
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* API macro by creating and then deleting counting semaphores with both
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* dynamically and statically allocated semaphore structures.
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*/
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static void prvCreateAndDeleteStaticallyAllocatedCountingSemaphores( void );
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/*
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* A function that demonstrates and tests the
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* xSemaphoreCreateRecursiveMutexStatic() API macro by creating and then
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* deleting recursive mutexes with both dynamically and statically allocated
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* semaphore structures.
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*/
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static void prvCreateAndDeleteStaticallyAllocatedRecursiveMutexes( void );
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/*
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* The task that creates and deletes other tasks has to delay occasionally to
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* ensure lower priority tasks are not starved of processing time. A pseudo
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@ -158,6 +180,11 @@ static TickType_t prvGetNextDelayTime( void );
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*/
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static void prvCheckQueueFunction( QueueHandle_t xQueue );
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/*
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* Checks the basic operation of a recursive mutex after it has been created.
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*/
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static void prvCheckRecursiveSemaphoreFunction( SemaphoreHandle_t xSemaphore );
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/*
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* Checks the basic operation of a binary semaphore after it has been created.
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*/
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@ -218,9 +245,15 @@ static void prvStaticallyAllocatedCreator( void *pvParameters )
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for( ;; )
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{
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/* Loop, running functions that create and delete the various objects
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that can be optionally created using either static or dynamic memory
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allocation. */
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prvCreateAndDeleteStaticallyAllocatedTasks();
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prvCreateAndDeleteStaticallyAllocatedQueues();
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prvCreateAndDeleteStaticallyAllocatedBinarySemaphores();
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prvCreateAndDeleteStaticallyAllocatedCountingSemaphores();
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prvCreateAndDeleteStaticallyAllocatedMutexes();
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prvCreateAndDeleteStaticallyAllocatedRecursiveMutexes();
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}
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}
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/*-----------------------------------------------------------*/
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@ -363,6 +396,162 @@ BaseType_t xReturned, xLoop;
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}
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/*-----------------------------------------------------------*/
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static void prvCheckRecursiveSemaphoreFunction( SemaphoreHandle_t xSemaphore )
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{
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const BaseType_t xLoops = 5;
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BaseType_t x, xReturned;
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/* A very basic test that the recursive semaphore behaved like a recursive
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semaphore. First the semaphore should not be able to be given, as it has not
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yet been taken. */
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xReturned = xSemaphoreGiveRecursive( xSemaphore );
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if( xReturned != pdFAIL )
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{
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xErrorOccurred = pdTRUE;
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}
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/* Now it should be possible to take the mutex a number of times. */
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for( x = 0; x < xLoops; x++ )
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{
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xReturned = xSemaphoreTakeRecursive( xSemaphore, staticDONT_BLOCK );
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if( xReturned != pdPASS )
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{
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xErrorOccurred = pdTRUE;
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}
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}
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/* Should be possible to give the semaphore the same number of times as it
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was given in the loop above. */
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for( x = 0; x < xLoops; x++ )
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{
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xReturned = xSemaphoreGiveRecursive( xSemaphore );
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if( xReturned != pdPASS )
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{
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xErrorOccurred = pdTRUE;
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}
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}
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/* No more gives should be possible though. */
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xReturned = xSemaphoreGiveRecursive( xSemaphore );
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if( xReturned != pdFAIL )
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{
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xErrorOccurred = pdTRUE;
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}
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}
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/*-----------------------------------------------------------*/
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static void prvCreateAndDeleteStaticallyAllocatedCountingSemaphores( void )
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{
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SemaphoreHandle_t xSemaphore;
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const UBaseType_t uxMaxCount = ( UBaseType_t ) 10;
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/* StaticSemaphore_t is a publicly accessible structure that has the same size
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and alignment requirements as the real semaphore structure. It is provided as a
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mechanism for applications to know the size of the semaphore (which is dependent
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on the architecture and configuration file settings) without breaking the strict
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data hiding policy by exposing the real semaphore internals. This
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StaticSemaphore_t variable is passed into the xSemaphoreCreateCountingStatic()
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function calls within this function. NOTE: In most usage scenarios now it is
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faster and more memory efficient to use a direct to task notification instead of
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a counting semaphore. http://www.freertos.org/RTOS-task-notifications.html */
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static StaticSemaphore_t xSemaphoreBuffer; /* Static so it doesn't use too much stack space. */
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/* Create the semaphore. xSemaphoreCreateCountingStatic() has one more
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parameter than the usual xSemaphoreCreateCounting() function. The paraemter
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is a pointer to the pre-allocated StaticSemaphore_t structure, which will
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hold information on the semaphore in an anonymous way. If the pointer is
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passed as NULL then the structure will be allocated dynamically, just as
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when xSemaphoreCreateCounting() is called. */
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xSemaphore = xSemaphoreCreateCountingStatic( uxMaxCount, 0, &xSemaphoreBuffer );
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/* The semaphore handle should equal the static semaphore structure passed
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into the xSemaphoreCreateBinaryStatic() function. */
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configASSERT( xSemaphore == ( SemaphoreHandle_t ) &xSemaphoreBuffer );
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/* Ensure the semaphore passes a few sanity checks as a valid semaphore. */
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prvCheckSemaphoreFunction( xSemaphore, uxMaxCount );
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/* Delete the semaphore again so the buffers can be reused. */
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vSemaphoreDelete( xSemaphore );
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/* The semaphore created above had a statically allocated semaphore
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structure. Repeat the above using NULL as the third
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xSemaphoreCreateCountingStatic() parameter so the semaphore structure is
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instead allocated dynamically. */
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xSemaphore = xSemaphoreCreateCountingStatic( uxMaxCount, 0, NULL );
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/* Ensure the semaphore passes a few sanity checks as a valid semaphore. */
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prvCheckSemaphoreFunction( xSemaphore, uxMaxCount );
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/* Delete the semaphore again so the buffers can be reused. */
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vSemaphoreDelete( xSemaphore );
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/* Ensure lower priority tasks get CPU time. */
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vTaskDelay( prvGetNextDelayTime() );
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/* Just to show the check task that this task is still executing. */
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uxCycleCounter++;
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}
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/*-----------------------------------------------------------*/
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static void prvCreateAndDeleteStaticallyAllocatedRecursiveMutexes( void )
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{
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SemaphoreHandle_t xSemaphore;
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/* StaticSemaphore_t is a publicly accessible structure that has the same size
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and alignment requirements as the real semaphore structure. It is provided as a
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mechanism for applications to know the size of the semaphore (which is dependent
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on the architecture and configuration file settings) without breaking the strict
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data hiding policy by exposing the real semaphore internals. This
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StaticSemaphore_t variable is passed into the
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xSemaphoreCreateRecursiveMutexStatic() function calls within this function. */
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static StaticSemaphore_t xSemaphoreBuffer; /* Static so it doesn't use too much stack space. */
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/* Create the semaphore. xSemaphoreCreateRecursiveMutexStatic() has one
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more parameter than the usual xSemaphoreCreateRecursiveMutex() function.
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The parameter is a pointer to the pre-allocated StaticSemaphore_t structure,
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which will hold information on the semaphore in an anonymous way. If the
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pointer is passed as NULL then the structure will be allocated dynamically,
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just as when xSemaphoreCreateRecursiveMutex() is called. */
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xSemaphore = xSemaphoreCreateRecursiveMutexStatic( &xSemaphoreBuffer );
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/* The semaphore handle should equal the static semaphore structure passed
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into the xSemaphoreCreateBinaryStatic() function. */
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configASSERT( xSemaphore == ( SemaphoreHandle_t ) &xSemaphoreBuffer );
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/* Ensure the semaphore passes a few sanity checks as a valid
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recursive semaphore. */
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prvCheckRecursiveSemaphoreFunction( xSemaphore );
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/* Delete the semaphore again so the buffers can be reused. */
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vSemaphoreDelete( xSemaphore );
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/* The semaphore created above had a statically allocated semaphore
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structure. Repeat the above using NULL as the
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xSemaphoreCreateRecursiveMutexStatic() parameter so the semaphore structure
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is instead allocated dynamically. */
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xSemaphore = xSemaphoreCreateRecursiveMutexStatic( NULL );
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/* Ensure the semaphore passes a few sanity checks as a valid semaphore. */
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prvCheckRecursiveSemaphoreFunction( xSemaphore );
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/* Delete the semaphore again so the buffers can be reused. */
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vSemaphoreDelete( xSemaphore );
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/* Ensure lower priority tasks get CPU time. */
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vTaskDelay( prvGetNextDelayTime() );
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/* Just to show the check task that this task is still executing. */
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uxCycleCounter++;
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}
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/*-----------------------------------------------------------*/
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static void prvCreateAndDeleteStaticallyAllocatedQueues( void )
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{
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QueueHandle_t xQueue;
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@ -448,6 +637,76 @@ static uint8_t ucQueueStorageArea[ staticQUEUE_LENGTH_IN_ITEMS * sizeof( uint64_
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}
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/*-----------------------------------------------------------*/
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static void prvCreateAndDeleteStaticallyAllocatedMutexes( void )
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{
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SemaphoreHandle_t xSemaphore;
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BaseType_t xReturned;
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/* StaticSemaphore_t is a publicly accessible structure that has the same size
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and alignment requirements as the real semaphore structure. It is provided as a
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mechanism for applications to know the size of the semaphore (which is dependent
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on the architecture and configuration file settings) without breaking the strict
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data hiding policy by exposing the real semaphore internals. This
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StaticSemaphore_t variable is passed into the xSemaphoreCreateMutexStatic()
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function calls within this function. */
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static StaticSemaphore_t xSemaphoreBuffer; /* Static so it doesn't use too much stack space. */
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/* Create the semaphore. xSemaphoreCreateMutexStatic() has one more
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parameter than the usual xSemaphoreCreateMutex() function. The paraemter
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is a pointer to the pre-allocated StaticSemaphore_t structure, which will
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hold information on the semaphore in an anonymous way. If the pointer is
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passed as NULL then the structure will be allocated dynamically, just as
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when xSemaphoreCreateMutex() is called. */
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xSemaphore = xSemaphoreCreateMutexStatic( &xSemaphoreBuffer );
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/* The semaphore handle should equal the static semaphore structure passed
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into the xSemaphoreCreateMutexStatic() function. */
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configASSERT( xSemaphore == ( SemaphoreHandle_t ) &xSemaphoreBuffer );
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/* Take the mutex so the mutex is in the state expected by the
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prvCheckSemaphoreFunction() function. */
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xReturned = xSemaphoreTake( xSemaphore, staticDONT_BLOCK );
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if( xReturned != pdPASS )
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{
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xErrorOccurred = pdTRUE;
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}
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/* Ensure the semaphore passes a few sanity checks as a valid semaphore. */
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prvCheckSemaphoreFunction( xSemaphore, staticBINARY_SEMAPHORE_MAX_COUNT );
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/* Delete the semaphore again so the buffers can be reused. */
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vSemaphoreDelete( xSemaphore );
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/* The semaphore created above had a statically allocated semaphore
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structure. Repeat the above using NULL as the xSemaphoreCreateMutexStatic()
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parameter so the semaphore structure is instead allocated dynamically. */
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xSemaphore = xSemaphoreCreateMutexStatic( NULL );
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/* Take the mutex so the mutex is in the state expected by the
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prvCheckSemaphoreFunction() function. */
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xReturned = xSemaphoreTake( xSemaphore, staticDONT_BLOCK );
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if( xReturned != pdPASS )
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{
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xErrorOccurred = pdTRUE;
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}
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/* Ensure the semaphore passes a few sanity checks as a valid semaphore. */
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prvCheckSemaphoreFunction( xSemaphore, staticBINARY_SEMAPHORE_MAX_COUNT );
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/* Delete the semaphore again so the buffers can be reused. */
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vSemaphoreDelete( xSemaphore );
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/* Ensure lower priority tasks get CPU time. */
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vTaskDelay( prvGetNextDelayTime() );
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/* Just to show the check task that this task is still executing. */
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uxCycleCounter++;
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}
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/*-----------------------------------------------------------*/
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static void prvCreateAndDeleteStaticallyAllocatedBinarySemaphores( void )
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{
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SemaphoreHandle_t xSemaphore;
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@ -457,10 +716,10 @@ and alignment requirements as the real semaphore structure. It is provided as a
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mechanism for applications to know the size of the semaphore (which is dependent
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on the architecture and configuration file settings) without breaking the strict
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data hiding policy by exposing the real semaphore internals. This
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StaticSemaphore_t variable is passed into the xSemaphoreCreateBinary() function
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calls within this function. NOTE: In most usage scenarios now it is faster and
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more memory efficient to use a direct to task notification instead of a binary
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semaphore. http://www.freertos.org/RTOS-task-notifications.html */
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StaticSemaphore_t variable is passed into the xSemaphoreCreateBinaryStatic()
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function calls within this function. NOTE: In most usage scenarios now it is
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faster and more memory efficient to use a direct to task notification instead of
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a binary semaphore. http://www.freertos.org/RTOS-task-notifications.html */
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static StaticSemaphore_t xSemaphoreBuffer; /* Static so it doesn't use too much stack space. */
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/* Create the semaphore. xSemaphoreCreateBinaryStatic() has one more
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@ -484,7 +743,7 @@ static StaticSemaphore_t xSemaphoreBuffer; /* Static so it doesn't use too much
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/* The semaphore created above had a statically allocated semaphore
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structure. Repeat the above using NULL as the xSemaphoreCreateBinaryStatic()
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parameter so the queue structure is instead allocated dynamically. */
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parameter so the semaphore structure is instead allocated dynamically. */
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xSemaphore = xSemaphoreCreateBinaryStatic( NULL );
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/* Ensure the semaphore passes a few sanity checks as a valid semaphore. */
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@ -1482,8 +1482,8 @@ BaseType_t xQueueCRReceive( QueueHandle_t xQueue, void *pvBuffer, TickType_t xTi
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* xSemaphoreCreateCounting() or xSemaphoreGetMutexHolder() instead of calling
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* these functions directly.
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*/
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QueueHandle_t xQueueCreateMutex( const uint8_t ucQueueType ) PRIVILEGED_FUNCTION;
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QueueHandle_t xQueueCreateCountingSemaphore( const UBaseType_t uxMaxCount, const UBaseType_t uxInitialCount ) PRIVILEGED_FUNCTION;
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QueueHandle_t xQueueCreateMutex( const uint8_t ucQueueType, StaticQueue_t *pxStaticQueue ) PRIVILEGED_FUNCTION;
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QueueHandle_t xQueueCreateCountingSemaphore( const UBaseType_t uxMaxCount, const UBaseType_t uxInitialCount, StaticQueue_t *pxStaticQueue ) PRIVILEGED_FUNCTION;
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void* xQueueGetMutexHolder( QueueHandle_t xSemaphore ) PRIVILEGED_FUNCTION;
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/*
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@ -699,7 +699,8 @@ typedef QueueHandle_t SemaphoreHandle_t;
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* \defgroup vSemaphoreCreateMutex vSemaphoreCreateMutex
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* \ingroup Semaphores
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*/
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#define xSemaphoreCreateMutex() xQueueCreateMutex( queueQUEUE_TYPE_MUTEX )
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#define xSemaphoreCreateMutex() xQueueCreateMutex( queueQUEUE_TYPE_MUTEX, NULL )
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#define xSemaphoreCreateMutexStatic( pxStaticQueue ) xQueueCreateMutex( queueQUEUE_TYPE_MUTEX, ( pxStaticQueue ) )
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/**
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@ -754,7 +755,8 @@ typedef QueueHandle_t SemaphoreHandle_t;
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* \defgroup vSemaphoreCreateMutex vSemaphoreCreateMutex
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* \ingroup Semaphores
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*/
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#define xSemaphoreCreateRecursiveMutex() xQueueCreateMutex( queueQUEUE_TYPE_RECURSIVE_MUTEX )
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#define xSemaphoreCreateRecursiveMutex() xQueueCreateMutex( queueQUEUE_TYPE_RECURSIVE_MUTEX, NULL )
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#define xSemaphoreCreateRecursiveMutexStatic( pxStaticSemaphore ) xQueueCreateMutex( queueQUEUE_TYPE_RECURSIVE_MUTEX, pxStaticSemaphore )
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/**
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* semphr. h
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@ -817,7 +819,8 @@ typedef QueueHandle_t SemaphoreHandle_t;
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* \defgroup xSemaphoreCreateCounting xSemaphoreCreateCounting
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* \ingroup Semaphores
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*/
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#define xSemaphoreCreateCounting( uxMaxCount, uxInitialCount ) xQueueCreateCountingSemaphore( ( uxMaxCount ), ( uxInitialCount ) )
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#define xSemaphoreCreateCounting( uxMaxCount, uxInitialCount ) xQueueCreateCountingSemaphore( ( uxMaxCount ), ( uxInitialCount ), ( NULL ) )
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#define xSemaphoreCreateCountingStatic( uxMaxCount, uxInitialCount, pxStaticSemaphore ) xQueueCreateCountingSemaphore( ( uxMaxCount ), ( uxInitialCount ), ( pxStaticSemaphore ) )
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/**
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* semphr. h
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@ -342,7 +342,7 @@ size_t xQueueSizeInBytes;
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#if( ( configASSERT_DEFINED == 1 ) && ( configSUPPORT_STATIC_ALLOCATION == 1 ) )
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{
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/* Sanity check that the size of the structure used to declare a
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variable of type StaticQueue_t or StaticSemaphore_t equals the size of
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variable of type StaticQueue_t or StaticSemaphore_t equals the size of
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the real queue and semaphore structures. */
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volatile size_t xSize = sizeof( StaticQueue_t );
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configASSERT( xSize == sizeof( Queue_t ) );
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@ -500,51 +500,29 @@ Queue_t *pxNewQueue;
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#if ( configUSE_MUTEXES == 1 )
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QueueHandle_t xQueueCreateMutex( const uint8_t ucQueueType )
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QueueHandle_t xQueueCreateMutex( const uint8_t ucQueueType, StaticQueue_t *pxStaticQueue )
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{
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Queue_t *pxNewQueue;
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const UBaseType_t uxMutexLength = ( UBaseType_t ) 1, uxMutexSize = ( UBaseType_t ) 0;
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/* Prevent compiler warnings about unused parameters if
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configUSE_TRACE_FACILITY does not equal 1. */
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( void ) ucQueueType;
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pxNewQueue = ( Queue_t * ) xQueueGenericCreate( uxMutexLength, uxMutexSize, NULL, pxStaticQueue, ucQueueType );
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/* Allocate the new queue structure. */
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pxNewQueue = ( Queue_t * ) pvPortMalloc( sizeof( Queue_t ) );
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if( pxNewQueue != NULL )
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{
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/* Information required for priority inheritance. */
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/* xQueueGenericCreate() will set all the queue structure members
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correctly for a generic queue, but this function is creating a
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mutex. Overwrite those members that need to be set differently -
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in particular the information required for priority inheritance. */
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pxNewQueue->pxMutexHolder = NULL;
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pxNewQueue->uxQueueType = queueQUEUE_IS_MUTEX;
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/* Queues used as a mutex no data is actually copied into or out
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of the queue. */
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pxNewQueue->pcWriteTo = NULL;
|
||||
pxNewQueue->u.pcReadFrom = NULL;
|
||||
|
||||
/* Each mutex has a length of 1 (like a binary semaphore) and
|
||||
an item size of 0 as nothing is actually copied into or out
|
||||
of the mutex. */
|
||||
pxNewQueue->uxMessagesWaiting = ( UBaseType_t ) 0U;
|
||||
pxNewQueue->uxLength = ( UBaseType_t ) 1U;
|
||||
pxNewQueue->uxItemSize = ( UBaseType_t ) 0U;
|
||||
pxNewQueue->xRxLock = queueUNLOCKED;
|
||||
pxNewQueue->xTxLock = queueUNLOCKED;
|
||||
|
||||
#if ( configUSE_TRACE_FACILITY == 1 )
|
||||
{
|
||||
pxNewQueue->ucQueueType = ucQueueType;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if ( configUSE_QUEUE_SETS == 1 )
|
||||
{
|
||||
pxNewQueue->pxQueueSetContainer = NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Ensure the event queues start with the correct state. */
|
||||
vListInitialise( &( pxNewQueue->xTasksWaitingToSend ) );
|
||||
vListInitialise( &( pxNewQueue->xTasksWaitingToReceive ) );
|
||||
/* In case this is a recursive mutex. */
|
||||
pxNewQueue->u.uxRecursiveCallCount = 0;
|
||||
|
||||
traceCREATE_MUTEX( pxNewQueue );
|
||||
|
||||
@ -618,7 +596,7 @@ Queue_t *pxNewQueue;
|
||||
uxRecursiveCallCount member. */
|
||||
( pxMutex->u.uxRecursiveCallCount )--;
|
||||
|
||||
/* Have we unwound the call count? */
|
||||
/* Has the recursive call count unwound to 0? */
|
||||
if( pxMutex->u.uxRecursiveCallCount == ( UBaseType_t ) 0 )
|
||||
{
|
||||
/* Return the mutex. This will automatically unblock any other
|
||||
@ -691,14 +669,14 @@ Queue_t *pxNewQueue;
|
||||
|
||||
#if ( configUSE_COUNTING_SEMAPHORES == 1 )
|
||||
|
||||
QueueHandle_t xQueueCreateCountingSemaphore( const UBaseType_t uxMaxCount, const UBaseType_t uxInitialCount )
|
||||
QueueHandle_t xQueueCreateCountingSemaphore( const UBaseType_t uxMaxCount, const UBaseType_t uxInitialCount, StaticQueue_t *pxStaticQueue )
|
||||
{
|
||||
QueueHandle_t xHandle;
|
||||
|
||||
configASSERT( uxMaxCount != 0 );
|
||||
configASSERT( uxInitialCount <= uxMaxCount );
|
||||
|
||||
xHandle = xQueueGenericCreate( uxMaxCount, queueSEMAPHORE_QUEUE_ITEM_LENGTH, NULL, NULL, queueQUEUE_TYPE_COUNTING_SEMAPHORE );
|
||||
xHandle = xQueueGenericCreate( uxMaxCount, queueSEMAPHORE_QUEUE_ITEM_LENGTH, NULL, pxStaticQueue, queueQUEUE_TYPE_COUNTING_SEMAPHORE );
|
||||
|
||||
if( xHandle != NULL )
|
||||
{
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user