freertos-7.5.2/Source/queue.c File Reference

#include <stdlib.h>
#include <string.h>
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"

Data Structures
struct	QueueDefinition

Macros
#define	MPU_WRAPPERS_INCLUDED_FROM_API_FILE
#define	prvLockQueue(pxQueue)
#define	pxMutexHolder   pcTail
#define	queueLOCKED_UNMODIFIED   ( ( signed portBASE_TYPE ) 0 )
#define	queueMUTEX_GIVE_BLOCK_TIME   ( ( portTickType ) 0U )
#define	queueQUEUE_IS_MUTEX   NULL
#define	queueSEMAPHORE_QUEUE_ITEM_LENGTH   ( ( unsigned portBASE_TYPE ) 0 )
#define	queueUNLOCKED   ( ( signed portBASE_TYPE ) -1 )
#define	uxQueueType   pcHead

Typedefs
typedef struct QueueDefinition	xQUEUE

Functions
static void	prvCopyDataFromQueue (xQUEUE *const pxQueue, const void *const pvBuffer) PRIVILEGED_FUNCTION
static void	prvCopyDataToQueue (xQUEUE *pxQueue, const void *pvItemToQueue, portBASE_TYPE xPosition) PRIVILEGED_FUNCTION
static signed portBASE_TYPE	prvIsQueueEmpty (const xQUEUE *pxQueue) PRIVILEGED_FUNCTION
static signed portBASE_TYPE	prvIsQueueFull (const xQUEUE *pxQueue) PRIVILEGED_FUNCTION
static void	prvUnlockQueue (xQUEUE *pxQueue) PRIVILEGED_FUNCTION
unsigned portBASE_TYPE	uxQueueMessagesWaiting (const xQueueHandle xQueue)
unsigned portBASE_TYPE	uxQueueMessagesWaitingFromISR (const xQueueHandle xQueue)
void	vQueueDelete (xQueueHandle xQueue)
xQueueHandle	xQueueGenericCreate (unsigned portBASE_TYPE uxQueueLength, unsigned portBASE_TYPE uxItemSize, unsigned char ucQueueType)
signed portBASE_TYPE	xQueueGenericReceive (xQueueHandle xQueue, const void *const pvBuffer, portTickType xTicksToWait, portBASE_TYPE xJustPeeking)
portBASE_TYPE	xQueueGenericReset (xQueueHandle xQueue, portBASE_TYPE xNewQueue)
signed portBASE_TYPE	xQueueGenericSend (xQueueHandle xQueue, const void *const pvItemToQueue, portTickType xTicksToWait, portBASE_TYPE xCopyPosition)
signed portBASE_TYPE	xQueueGenericSendFromISR (xQueueHandle xQueue, const void *const pvItemToQueue, signed portBASE_TYPE *pxHigherPriorityTaskWoken, portBASE_TYPE xCopyPosition)
signed portBASE_TYPE	xQueueIsQueueEmptyFromISR (const xQueueHandle xQueue)
signed portBASE_TYPE	xQueueIsQueueFullFromISR (const xQueueHandle xQueue)
signed portBASE_TYPE	xQueuePeekFromISR (xQueueHandle xQueue, const void *const pvBuffer)
signed portBASE_TYPE	xQueueReceiveFromISR (xQueueHandle xQueue, const void *const pvBuffer, signed portBASE_TYPE *pxHigherPriorityTaskWoken)

#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE

#define prvLockQueue

(

pxQueue

)

Value:

taskENTER_CRITICAL();                                   \
    {                                                       \
		if( ( pxQueue )->xRxLock == queueUNLOCKED )           \
        {                                                   \
            ( pxQueue )->xRxLock = queueLOCKED_UNMODIFIED;  \
        }                                                   \
		if( ( pxQueue )->xTxLock == queueUNLOCKED )           \
        {                                                   \
            ( pxQueue )->xTxLock = queueLOCKED_UNMODIFIED;  \
        }                                                   \
    }                                                       \
	taskEXIT_CRITICAL()

Referenced by xQueueGenericReceive(), and xQueueGenericSend().

#define pxMutexHolder   pcTail

#define queueLOCKED_UNMODIFIED   ( ( signed portBASE_TYPE ) 0 )

Referenced by prvUnlockQueue().

#define queueMUTEX_GIVE_BLOCK_TIME   ( ( portTickType ) 0U )

#define queueQUEUE_IS_MUTEX   NULL

Referenced by prvCopyDataFromQueue(), prvCopyDataToQueue(), and xQueueGenericReceive().

#define queueSEMAPHORE_QUEUE_ITEM_LENGTH   ( ( unsigned portBASE_TYPE ) 0 )

#define queueUNLOCKED   ( ( signed portBASE_TYPE ) -1 )

Referenced by prvUnlockQueue(), xQueueGenericReset(), xQueueGenericSendFromISR(), and xQueueReceiveFromISR().

#define uxQueueType   pcHead

typedef struct QueueDefinition xQUEUE

static void prvCopyDataFromQueue ( xQUEUE *const  pxQueue, const void *const  pvBuffer  )

static

References QueueDefinition::pcHead, QueueDefinition::pcReadFrom, QueueDefinition::pcTail, queueQUEUE_IS_MUTEX, QueueDefinition::u, and QueueDefinition::uxItemSize.

Referenced by xQueueGenericReceive(), xQueuePeekFromISR(), and xQueueReceiveFromISR().

static void prvCopyDataToQueue ( xQUEUE *  pxQueue, const void *  pvItemToQueue, portBASE_TYPE  xPosition  )

static

References NULL, QueueDefinition::pcHead, QueueDefinition::pcReadFrom, QueueDefinition::pcTail, QueueDefinition::pcWriteTo, queueOVERWRITE, queueQUEUE_IS_MUTEX, queueSEND_TO_BACK, QueueDefinition::u, QueueDefinition::uxItemSize, QueueDefinition::uxMessagesWaiting, and vTaskPriorityDisinherit().

Referenced by xQueueGenericSend(), and xQueueGenericSendFromISR().

static signed portBASE_TYPE prvIsQueueEmpty ( const xQUEUE *  pxQueue )

static

References pdFALSE, pdTRUE, taskENTER_CRITICAL, taskEXIT_CRITICAL, and QueueDefinition::uxMessagesWaiting.

Referenced by xQueueGenericReceive().

static signed portBASE_TYPE prvIsQueueFull ( const xQUEUE *  pxQueue )

static

References pdFALSE, pdTRUE, taskENTER_CRITICAL, taskEXIT_CRITICAL, QueueDefinition::uxLength, and QueueDefinition::uxMessagesWaiting.

Referenced by xQueueGenericSend().

static void prvUnlockQueue ( xQUEUE *  pxQueue )

static

References listLIST_IS_EMPTY, NULL, pdFALSE, pdTRUE, queueLOCKED_UNMODIFIED, queueSEND_TO_BACK, queueUNLOCKED, taskENTER_CRITICAL, taskEXIT_CRITICAL, vTaskMissedYield(), QueueDefinition::xRxLock, xTaskRemoveFromEventList(), QueueDefinition::xTasksWaitingToReceive, QueueDefinition::xTasksWaitingToSend, and QueueDefinition::xTxLock.

Referenced by xQueueGenericReceive(), and xQueueGenericSend().

unsigned portBASE_TYPE uxQueueMessagesWaiting

(

const xQueueHandle

xQueue

)

unsigned portBASE_TYPE uxQueueMessagesWaitingFromISR

(

const xQueueHandle

xQueue

)

void vQueueDelete

(

xQueueHandle

xQueue

)

xQueueHandle xQueueGenericCreate	(	unsigned portBASE_TYPE	uxQueueLength,
		unsigned portBASE_TYPE	uxItemSize,
		unsigned char	ucQueueType
	)

signed portBASE_TYPE xQueueGenericReceive	(	xQueueHandle	xQueue,
		const void *const	pvBuffer,
		portTickType	xTicksToWait,
		portBASE_TYPE	xJustPeeking
	)

References configASSERT, errQUEUE_EMPTY, listLIST_IS_EMPTY, NULL, QueueDefinition::pcReadFrom, pdFALSE, pdPASS, pdTRUE, portTickType, portYIELD_WITHIN_API, prvCopyDataFromQueue(), prvIsQueueEmpty(), prvLockQueue, prvUnlockQueue(), queueQUEUE_IS_MUTEX, taskENTER_CRITICAL, taskEXIT_CRITICAL, traceBLOCKING_ON_QUEUE_RECEIVE, traceQUEUE_PEEK, traceQUEUE_RECEIVE, traceQUEUE_RECEIVE_FAILED, QueueDefinition::u, QueueDefinition::uxItemSize, QueueDefinition::uxMessagesWaiting, vTaskPlaceOnEventList(), vTaskPriorityInherit(), vTaskSetTimeOutState(), vTaskSuspendAll(), xTaskCheckForTimeOut(), xTaskGetCurrentTaskHandle(), xTaskRemoveFromEventList(), xTaskResumeAll(), QueueDefinition::xTasksWaitingToReceive, and QueueDefinition::xTasksWaitingToSend.

portBASE_TYPE xQueueGenericReset	(	xQueueHandle	xQueue,
		portBASE_TYPE	xNewQueue
	)

Referenced by prvInitialiseNewQueue(), and xQueueGenericCreate().

signed portBASE_TYPE xQueueGenericSend	(	xQueueHandle	xQueue,
		const void *const	pvItemToQueue,
		portTickType	xTicksToWait,
		portBASE_TYPE	xCopyPosition
	)

signed portBASE_TYPE xQueueGenericSendFromISR	(	xQueueHandle	xQueue,
		const void *const	pvItemToQueue,
		signed portBASE_TYPE *	pxHigherPriorityTaskWoken,
		portBASE_TYPE	xCopyPosition
	)

signed portBASE_TYPE xQueueIsQueueEmptyFromISR

(

const xQueueHandle

xQueue

)

signed portBASE_TYPE xQueueIsQueueFullFromISR

(

const xQueueHandle

xQueue

)

signed portBASE_TYPE xQueuePeekFromISR	(	xQueueHandle	xQueue,
		const void *const	pvBuffer
	)

References configASSERT, NULL, QueueDefinition::pcReadFrom, pdFAIL, pdPASS, portASSERT_IF_INTERRUPT_PRIORITY_INVALID, portCLEAR_INTERRUPT_MASK_FROM_ISR, portSET_INTERRUPT_MASK_FROM_ISR, prvCopyDataFromQueue(), traceQUEUE_PEEK_FROM_ISR, traceQUEUE_PEEK_FROM_ISR_FAILED, QueueDefinition::u, QueueDefinition::uxItemSize, and QueueDefinition::uxMessagesWaiting.

signed portBASE_TYPE xQueueReceiveFromISR	(	xQueueHandle	xQueue,
		const void *const	pvBuffer,
		signed portBASE_TYPE *	pxHigherPriorityTaskWoken
	)

References configASSERT, listLIST_IS_EMPTY, NULL, pdFAIL, pdFALSE, pdPASS, pdTRUE, portASSERT_IF_INTERRUPT_PRIORITY_INVALID, portCLEAR_INTERRUPT_MASK_FROM_ISR, portSET_INTERRUPT_MASK_FROM_ISR, prvCopyDataFromQueue(), queueUNLOCKED, traceQUEUE_RECEIVE_FROM_ISR, traceQUEUE_RECEIVE_FROM_ISR_FAILED, QueueDefinition::uxItemSize, QueueDefinition::uxMessagesWaiting, QueueDefinition::xRxLock, xTaskRemoveFromEventList(), and QueueDefinition::xTasksWaitingToSend.