epagris/FreeRTOS-Kernel
1
0
Fork 1
mirror of https://github.com/FreeRTOS/FreeRTOS-Kernel.git synced 2025-11-04 11:09:01 +01:00
Code Issues Packages Projects Releases Wiki Activity

Update documentation.

Browse Source
This commit is contained in:
Richard Barry 2007-12-06 10:19:28 +00:00
parent 6e27b6ec86
commit fb799b7647
3 changed files with 38 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
Source/include/queue.h
View File

@ -1160,25 +1160,21 @@ signed portBASE_TYPE xQueueGenericSendFromISR( xQueueHandle pxQueue, const void
signed portBASE_TYPE xQueueReceiveFromISR( xQueueHandle pxQueue, const void * const pvBuffer, signed portBASE_TYPE *pxTaskWoken );
/*
* xQueueAltGenericSend() is a light weight version of xQueueGenericSend().
* Likewise xQueueAltGenericReceive() is a light weight version of
* xQueueAltGenericSend() is an alternative version of xQueueGenericSend().
* Likewise xQueueAltGenericReceive() is an alternative version of
* xQueueGenericReceive().
*
* The source code that implements the light weight (fast) API is much
* The source code that implements the alternative (Alt) API is much
* simpler because it executes everything from within a critical section.
* This is the approach taken by many other RTOSes, but FreeRTOS.org has the
* fully featured API as an alternative. The fully featured API has more
* preferred fully featured API too. The fully featured API has more
* complex code that takes longer to execute, but makes much less use of
* critical sections. Therefore the light weight API sacrifices interrupt
* critical sections. Therefore the alternative API sacrifices interrupt
* responsiveness to gain execution speed, whereas the fully featured API
* sacrifices execution speed to ensure better interrupt responsiveness.
*/
signed portBASE_TYPE xQueueAltGenericSend( xQueueHandle pxQueue, const void * const pvItemToQueue, portTickType xTicksToWait, portBASE_TYPE xCopyPosition );
signed portBASE_TYPE xQueueAltGenericReceive( xQueueHandle pxQueue, const void * const pvBuffer, portTickType xTicksToWait, portBASE_TYPE xJustPeeking );
/*
* The light weight versions of the fully featured macros.
*/
#define xQueueAltSendToFront( xQueue, pvItemToQueue, xTicksToWait ) xQueueAltGenericSend( xQueue, pvItemToQueue, xTicksToWait, queueSEND_TO_FRONT )
#define xQueueAltSendToBack( xQueue, pvItemToQueue, xTicksToWait ) xQueueAltGenericSend( xQueue, pvItemToQueue, xTicksToWait, queueSEND_TO_BACK )
#define xQueueAltReceive( xQueue, pvBuffer, xTicksToWait ) xQueueAltGenericReceive( xQueue, pvBuffer, xTicksToWait, pdFALSE )

28
Source/include/semphr.h
View File

@ -155,6 +155,19 @@ typedef xQueueHandle xSemaphoreHandle;
* \ingroup Semaphores
*/
#define xSemaphoreTake( xSemaphore, xBlockTime ) xQueueGenericReceive( ( xQueueHandle ) xSemaphore, NULL, xBlockTime, pdFALSE )
/*
* xSemaphoreAltTake() is an alternative version of xSemaphoreTake().
*
* The source code that implements the alternative (Alt) API is much
* simpler because it executes everything from within a critical section.
* This is the approach taken by many other RTOSes, but FreeRTOS.org has the
* preferred fully featured API too. The fully featured API has more
* complex code that takes longer to execute, but makes much less use of
* critical sections. Therefore the alternative API sacrifices interrupt
* responsiveness to gain execution speed, whereas the fully featured API
* sacrifices execution speed to ensure better interrupt responsiveness.
*/
#define xSemaphoreAltTake( xSemaphore, xBlockTime ) xQueueAltGenericReceive( ( xQueueHandle ) xSemaphore, NULL, xBlockTime, pdFALSE )
/**
@ -215,6 +228,19 @@ typedef xQueueHandle xSemaphoreHandle;
* \ingroup Semaphores
*/
#define xSemaphoreGive( xSemaphore ) xQueueGenericSend( ( xQueueHandle ) xSemaphore, NULL, semGIVE_BLOCK_TIME, queueSEND_TO_BACK )
/*
* xSemaphoreAltGive() is an alternative version of xSemaphoreGive().
*
* The source code that implements the alternative (Alt) API is much
* simpler because it executes everything from within a critical section.
* This is the approach taken by many other RTOSes, but FreeRTOS.org has the
* preferred fully featured API too. The fully featured API has more
* complex code that takes longer to execute, but makes much less use of
* critical sections. Therefore the alternative API sacrifices interrupt
* responsiveness to gain execution speed, whereas the fully featured API
* sacrifices execution speed to ensure better interrupt responsiveness.
*/
#define xSemaphoreAltGive( xSemaphore ) xQueueAltGenericSend( ( xQueueHandle ) xSemaphore, NULL, semGIVE_BLOCK_TIME, queueSEND_TO_BACK )
/**
@ -313,7 +339,7 @@ typedef xQueueHandle xSemaphoreHandle;
*
* Mutex type semaphores cannot be used from within interrupt service routines.
*
* See xSemaphoreCreateBinary() for an alternative implemnetation that can be
* See xSemaphoreCreateBinary() for an alternative implementation that can be
* used for pure synchronisation (where one task or interrupt always 'gives' the
* semaphore and another always 'takes' the semaphore) and from within interrupt
* service routines.

16
Source/queue.c
View File

@ -464,12 +464,12 @@ xTimeOutType xTimeOut;
signed portBASE_TYPE xReturn;
xTimeOutType xTimeOut;
/* The source code that implements the light weight (fast) API is much
/* The source code that implements the alternative (Alt) API is much
simpler because it executes everything from within a critical section.
This is the approach taken by many other RTOSes, but FreeRTOS.org has the
fully featured API as an alternative. The fully featured API has more
preferred fully featured API too. The fully featured API has more
complex code that takes longer to execute, but makes much less use of
critical sections. Therefore the light weight API sacrifices interrupt
critical sections. Therefore the alternative API sacrifices interrupt
responsiveness to gain execution speed, whereas the fully featured API
sacrifices execution speed to ensure better interrupt responsiveness. */
@ -528,10 +528,6 @@ xTimeOutType xTimeOut;
xReturn = queueERRONEOUS_UNBLOCK;
}
}
else
{
}
}
}
while( xReturn == queueERRONEOUS_UNBLOCK );
@ -552,12 +548,12 @@ xTimeOutType xTimeOut;
xTimeOutType xTimeOut;
signed portCHAR *pcOriginalReadPosition;
/* The source code that implements the light weight (fast) API is much
/* The source code that implements the alternative (Alt) API is much
simpler because it executes everything from within a critical section.
This is the approach taken by many other RTOSes, but FreeRTOS.org has the
fully featured API as an alternative. The fully featured API has more
preferred fully featured API too. The fully featured API has more
complex code that takes longer to execute, but makes much less use of
critical sections. Therefore the light weight API sacrifices interrupt
critical sections. Therefore the alternative API sacrifices interrupt
responsiveness to gain execution speed, whereas the fully featured API
sacrifices execution speed to ensure better interrupt responsiveness. */