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683
third_party/FreeRTOS/Source/event_groups.c
vendored
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683
third_party/FreeRTOS/Source/event_groups.c
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|
@ -0,0 +1,683 @@
|
|||
/*
|
||||
FreeRTOS V8.2.1 - Copyright (C) 2015 Real Time Engineers Ltd.
|
||||
All rights reserved
|
||||
|
||||
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
|
||||
|
||||
This file is part of the FreeRTOS distribution.
|
||||
|
||||
FreeRTOS is free software; you can redistribute it and/or modify it under
|
||||
the terms of the GNU General Public License (version 2) as published by the
|
||||
Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
|
||||
|
||||
***************************************************************************
|
||||
>>! NOTE: The modification to the GPL is included to allow you to !<<
|
||||
>>! distribute a combined work that includes FreeRTOS without being !<<
|
||||
>>! obliged to provide the source code for proprietary components !<<
|
||||
>>! outside of the FreeRTOS kernel. !<<
|
||||
***************************************************************************
|
||||
|
||||
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
|
||||
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
||||
FOR A PARTICULAR PURPOSE. Full license text is available on the following
|
||||
link: http://www.freertos.org/a00114.html
|
||||
|
||||
***************************************************************************
|
||||
* *
|
||||
* FreeRTOS provides completely free yet professionally developed, *
|
||||
* robust, strictly quality controlled, supported, and cross *
|
||||
* platform software that is more than just the market leader, it *
|
||||
* is the industry's de facto standard. *
|
||||
* *
|
||||
* Help yourself get started quickly while simultaneously helping *
|
||||
* to support the FreeRTOS project by purchasing a FreeRTOS *
|
||||
* tutorial book, reference manual, or both: *
|
||||
* http://www.FreeRTOS.org/Documentation *
|
||||
* *
|
||||
***************************************************************************
|
||||
|
||||
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
|
||||
the FAQ page "My application does not run, what could be wrong?". Have you
|
||||
defined configASSERT()?
|
||||
|
||||
http://www.FreeRTOS.org/support - In return for receiving this top quality
|
||||
embedded software for free we request you assist our global community by
|
||||
participating in the support forum.
|
||||
|
||||
http://www.FreeRTOS.org/training - Investing in training allows your team to
|
||||
be as productive as possible as early as possible. Now you can receive
|
||||
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
|
||||
Ltd, and the world's leading authority on the world's leading RTOS.
|
||||
|
||||
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
|
||||
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
|
||||
compatible FAT file system, and our tiny thread aware UDP/IP stack.
|
||||
|
||||
http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
|
||||
Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
|
||||
|
||||
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
|
||||
Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
|
||||
licenses offer ticketed support, indemnification and commercial middleware.
|
||||
|
||||
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
|
||||
engineered and independently SIL3 certified version for use in safety and
|
||||
mission critical applications that require provable dependability.
|
||||
|
||||
1 tab == 4 spaces!
|
||||
*/
|
||||
|
||||
/* Standard includes. */
|
||||
#include <stdlib.h>
|
||||
|
||||
/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
|
||||
all the API functions to use the MPU wrappers. That should only be done when
|
||||
task.h is included from an application file. */
|
||||
#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
|
||||
|
||||
/* FreeRTOS includes. */
|
||||
#include "FreeRTOS.h"
|
||||
#include "task.h"
|
||||
#include "timers.h"
|
||||
#include "event_groups.h"
|
||||
|
||||
/* Lint e961 and e750 are suppressed as a MISRA exception justified because the
|
||||
MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be defined for the
|
||||
header files above, but not in this file, in order to generate the correct
|
||||
privileged Vs unprivileged linkage and placement. */
|
||||
#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750. */
|
||||
|
||||
#if ( INCLUDE_xEventGroupSetBitFromISR == 1 ) && ( configUSE_TIMERS == 0 )
|
||||
#error configUSE_TIMERS must be set to 1 to make the xEventGroupSetBitFromISR() function available.
|
||||
#endif
|
||||
|
||||
#if ( INCLUDE_xEventGroupSetBitFromISR == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 0 )
|
||||
#error INCLUDE_xTimerPendFunctionCall must also be set to one to make the xEventGroupSetBitFromISR() function available.
|
||||
#endif
|
||||
|
||||
/* The following bit fields convey control information in a task's event list
|
||||
item value. It is important they don't clash with the
|
||||
taskEVENT_LIST_ITEM_VALUE_IN_USE definition. */
|
||||
#if configUSE_16_BIT_TICKS == 1
|
||||
#define eventCLEAR_EVENTS_ON_EXIT_BIT 0x0100U
|
||||
#define eventUNBLOCKED_DUE_TO_BIT_SET 0x0200U
|
||||
#define eventWAIT_FOR_ALL_BITS 0x0400U
|
||||
#define eventEVENT_BITS_CONTROL_BYTES 0xff00U
|
||||
#else
|
||||
#define eventCLEAR_EVENTS_ON_EXIT_BIT 0x01000000UL
|
||||
#define eventUNBLOCKED_DUE_TO_BIT_SET 0x02000000UL
|
||||
#define eventWAIT_FOR_ALL_BITS 0x04000000UL
|
||||
#define eventEVENT_BITS_CONTROL_BYTES 0xff000000UL
|
||||
#endif
|
||||
|
||||
typedef struct xEventGroupDefinition
|
||||
{
|
||||
EventBits_t uxEventBits;
|
||||
List_t xTasksWaitingForBits; /*< List of tasks waiting for a bit to be set. */
|
||||
|
||||
#if( configUSE_TRACE_FACILITY == 1 )
|
||||
UBaseType_t uxEventGroupNumber;
|
||||
#endif
|
||||
|
||||
} EventGroup_t;
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* Test the bits set in uxCurrentEventBits to see if the wait condition is met.
|
||||
* The wait condition is defined by xWaitForAllBits. If xWaitForAllBits is
|
||||
* pdTRUE then the wait condition is met if all the bits set in uxBitsToWaitFor
|
||||
* are also set in uxCurrentEventBits. If xWaitForAllBits is pdFALSE then the
|
||||
* wait condition is met if any of the bits set in uxBitsToWait for are also set
|
||||
* in uxCurrentEventBits.
|
||||
*/
|
||||
static BaseType_t prvTestWaitCondition( const EventBits_t uxCurrentEventBits, const EventBits_t uxBitsToWaitFor, const BaseType_t xWaitForAllBits );
|
||||
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
EventGroupHandle_t xEventGroupCreate( void )
|
||||
{
|
||||
EventGroup_t *pxEventBits;
|
||||
|
||||
pxEventBits = ( EventGroup_t * ) pvPortMalloc( sizeof( EventGroup_t ) );
|
||||
if( pxEventBits != NULL )
|
||||
{
|
||||
pxEventBits->uxEventBits = 0;
|
||||
vListInitialise( &( pxEventBits->xTasksWaitingForBits ) );
|
||||
traceEVENT_GROUP_CREATE( pxEventBits );
|
||||
}
|
||||
else
|
||||
{
|
||||
traceEVENT_GROUP_CREATE_FAILED();
|
||||
}
|
||||
|
||||
return ( EventGroupHandle_t ) pxEventBits;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
EventBits_t xEventGroupSync( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, const EventBits_t uxBitsToWaitFor, TickType_t xTicksToWait )
|
||||
{
|
||||
EventBits_t uxOriginalBitValue, uxReturn;
|
||||
EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
|
||||
BaseType_t xAlreadyYielded;
|
||||
BaseType_t xTimeoutOccurred = pdFALSE;
|
||||
|
||||
configASSERT( ( uxBitsToWaitFor & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
|
||||
configASSERT( uxBitsToWaitFor != 0 );
|
||||
#if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )
|
||||
{
|
||||
configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );
|
||||
}
|
||||
#endif
|
||||
|
||||
vTaskSuspendAll();
|
||||
{
|
||||
uxOriginalBitValue = pxEventBits->uxEventBits;
|
||||
|
||||
( void ) xEventGroupSetBits( xEventGroup, uxBitsToSet );
|
||||
|
||||
if( ( ( uxOriginalBitValue | uxBitsToSet ) & uxBitsToWaitFor ) == uxBitsToWaitFor )
|
||||
{
|
||||
/* All the rendezvous bits are now set - no need to block. */
|
||||
uxReturn = ( uxOriginalBitValue | uxBitsToSet );
|
||||
|
||||
/* Rendezvous always clear the bits. They will have been cleared
|
||||
already unless this is the only task in the rendezvous. */
|
||||
pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
|
||||
|
||||
xTicksToWait = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
if( xTicksToWait != ( TickType_t ) 0 )
|
||||
{
|
||||
traceEVENT_GROUP_SYNC_BLOCK( xEventGroup, uxBitsToSet, uxBitsToWaitFor );
|
||||
|
||||
/* Store the bits that the calling task is waiting for in the
|
||||
task's event list item so the kernel knows when a match is
|
||||
found. Then enter the blocked state. */
|
||||
vTaskPlaceOnUnorderedEventList( &( pxEventBits->xTasksWaitingForBits ), ( uxBitsToWaitFor | eventCLEAR_EVENTS_ON_EXIT_BIT | eventWAIT_FOR_ALL_BITS ), xTicksToWait );
|
||||
|
||||
/* This assignment is obsolete as uxReturn will get set after
|
||||
the task unblocks, but some compilers mistakenly generate a
|
||||
warning about uxReturn being returned without being set if the
|
||||
assignment is omitted. */
|
||||
uxReturn = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The rendezvous bits were not set, but no block time was
|
||||
specified - just return the current event bit value. */
|
||||
uxReturn = pxEventBits->uxEventBits;
|
||||
}
|
||||
}
|
||||
}
|
||||
xAlreadyYielded = xTaskResumeAll();
|
||||
|
||||
if( xTicksToWait != ( TickType_t ) 0 )
|
||||
{
|
||||
if( xAlreadyYielded == pdFALSE )
|
||||
{
|
||||
portYIELD_WITHIN_API();
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
|
||||
/* The task blocked to wait for its required bits to be set - at this
|
||||
point either the required bits were set or the block time expired. If
|
||||
the required bits were set they will have been stored in the task's
|
||||
event list item, and they should now be retrieved then cleared. */
|
||||
uxReturn = uxTaskResetEventItemValue();
|
||||
|
||||
if( ( uxReturn & eventUNBLOCKED_DUE_TO_BIT_SET ) == ( EventBits_t ) 0 )
|
||||
{
|
||||
/* The task timed out, just return the current event bit value. */
|
||||
taskENTER_CRITICAL();
|
||||
{
|
||||
uxReturn = pxEventBits->uxEventBits;
|
||||
|
||||
/* Although the task got here because it timed out before the
|
||||
bits it was waiting for were set, it is possible that since it
|
||||
unblocked another task has set the bits. If this is the case
|
||||
then it needs to clear the bits before exiting. */
|
||||
if( ( uxReturn & uxBitsToWaitFor ) == uxBitsToWaitFor )
|
||||
{
|
||||
pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
}
|
||||
taskEXIT_CRITICAL();
|
||||
|
||||
xTimeoutOccurred = pdTRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The task unblocked because the bits were set. */
|
||||
}
|
||||
|
||||
/* Control bits might be set as the task had blocked should not be
|
||||
returned. */
|
||||
uxReturn &= ~eventEVENT_BITS_CONTROL_BYTES;
|
||||
}
|
||||
|
||||
traceEVENT_GROUP_SYNC_END( xEventGroup, uxBitsToSet, uxBitsToWaitFor, xTimeoutOccurred );
|
||||
|
||||
return uxReturn;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
EventBits_t xEventGroupWaitBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToWaitFor, const BaseType_t xClearOnExit, const BaseType_t xWaitForAllBits, TickType_t xTicksToWait )
|
||||
{
|
||||
EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
|
||||
EventBits_t uxReturn, uxControlBits = 0;
|
||||
BaseType_t xWaitConditionMet, xAlreadyYielded;
|
||||
BaseType_t xTimeoutOccurred = pdFALSE;
|
||||
|
||||
/* Check the user is not attempting to wait on the bits used by the kernel
|
||||
itself, and that at least one bit is being requested. */
|
||||
configASSERT( xEventGroup );
|
||||
configASSERT( ( uxBitsToWaitFor & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
|
||||
configASSERT( uxBitsToWaitFor != 0 );
|
||||
#if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )
|
||||
{
|
||||
configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );
|
||||
}
|
||||
#endif
|
||||
|
||||
vTaskSuspendAll();
|
||||
{
|
||||
const EventBits_t uxCurrentEventBits = pxEventBits->uxEventBits;
|
||||
|
||||
/* Check to see if the wait condition is already met or not. */
|
||||
xWaitConditionMet = prvTestWaitCondition( uxCurrentEventBits, uxBitsToWaitFor, xWaitForAllBits );
|
||||
|
||||
if( xWaitConditionMet != pdFALSE )
|
||||
{
|
||||
/* The wait condition has already been met so there is no need to
|
||||
block. */
|
||||
uxReturn = uxCurrentEventBits;
|
||||
xTicksToWait = ( TickType_t ) 0;
|
||||
|
||||
/* Clear the wait bits if requested to do so. */
|
||||
if( xClearOnExit != pdFALSE )
|
||||
{
|
||||
pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
}
|
||||
else if( xTicksToWait == ( TickType_t ) 0 )
|
||||
{
|
||||
/* The wait condition has not been met, but no block time was
|
||||
specified, so just return the current value. */
|
||||
uxReturn = uxCurrentEventBits;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The task is going to block to wait for its required bits to be
|
||||
set. uxControlBits are used to remember the specified behaviour of
|
||||
this call to xEventGroupWaitBits() - for use when the event bits
|
||||
unblock the task. */
|
||||
if( xClearOnExit != pdFALSE )
|
||||
{
|
||||
uxControlBits |= eventCLEAR_EVENTS_ON_EXIT_BIT;
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
|
||||
if( xWaitForAllBits != pdFALSE )
|
||||
{
|
||||
uxControlBits |= eventWAIT_FOR_ALL_BITS;
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
|
||||
/* Store the bits that the calling task is waiting for in the
|
||||
task's event list item so the kernel knows when a match is
|
||||
found. Then enter the blocked state. */
|
||||
vTaskPlaceOnUnorderedEventList( &( pxEventBits->xTasksWaitingForBits ), ( uxBitsToWaitFor | uxControlBits ), xTicksToWait );
|
||||
|
||||
/* This is obsolete as it will get set after the task unblocks, but
|
||||
some compilers mistakenly generate a warning about the variable
|
||||
being returned without being set if it is not done. */
|
||||
uxReturn = 0;
|
||||
|
||||
traceEVENT_GROUP_WAIT_BITS_BLOCK( xEventGroup, uxBitsToWaitFor );
|
||||
}
|
||||
}
|
||||
xAlreadyYielded = xTaskResumeAll();
|
||||
|
||||
if( xTicksToWait != ( TickType_t ) 0 )
|
||||
{
|
||||
if( xAlreadyYielded == pdFALSE )
|
||||
{
|
||||
portYIELD_WITHIN_API();
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
|
||||
/* The task blocked to wait for its required bits to be set - at this
|
||||
point either the required bits were set or the block time expired. If
|
||||
the required bits were set they will have been stored in the task's
|
||||
event list item, and they should now be retrieved then cleared. */
|
||||
uxReturn = uxTaskResetEventItemValue();
|
||||
|
||||
if( ( uxReturn & eventUNBLOCKED_DUE_TO_BIT_SET ) == ( EventBits_t ) 0 )
|
||||
{
|
||||
taskENTER_CRITICAL();
|
||||
{
|
||||
/* The task timed out, just return the current event bit value. */
|
||||
uxReturn = pxEventBits->uxEventBits;
|
||||
|
||||
/* It is possible that the event bits were updated between this
|
||||
task leaving the Blocked state and running again. */
|
||||
if( prvTestWaitCondition( uxReturn, uxBitsToWaitFor, xWaitForAllBits ) != pdFALSE )
|
||||
{
|
||||
if( xClearOnExit != pdFALSE )
|
||||
{
|
||||
pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
}
|
||||
taskEXIT_CRITICAL();
|
||||
|
||||
/* Prevent compiler warnings when trace macros are not used. */
|
||||
xTimeoutOccurred = pdFALSE;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The task unblocked because the bits were set. */
|
||||
}
|
||||
|
||||
/* The task blocked so control bits may have been set. */
|
||||
uxReturn &= ~eventEVENT_BITS_CONTROL_BYTES;
|
||||
}
|
||||
traceEVENT_GROUP_WAIT_BITS_END( xEventGroup, uxBitsToWaitFor, xTimeoutOccurred );
|
||||
|
||||
return uxReturn;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
EventBits_t xEventGroupClearBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToClear )
|
||||
{
|
||||
EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
|
||||
EventBits_t uxReturn;
|
||||
|
||||
/* Check the user is not attempting to clear the bits used by the kernel
|
||||
itself. */
|
||||
configASSERT( xEventGroup );
|
||||
configASSERT( ( uxBitsToClear & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
|
||||
|
||||
taskENTER_CRITICAL();
|
||||
{
|
||||
traceEVENT_GROUP_CLEAR_BITS( xEventGroup, uxBitsToClear );
|
||||
|
||||
/* The value returned is the event group value prior to the bits being
|
||||
cleared. */
|
||||
uxReturn = pxEventBits->uxEventBits;
|
||||
|
||||
/* Clear the bits. */
|
||||
pxEventBits->uxEventBits &= ~uxBitsToClear;
|
||||
}
|
||||
taskEXIT_CRITICAL();
|
||||
|
||||
return uxReturn;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) )
|
||||
|
||||
BaseType_t xEventGroupClearBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToClear )
|
||||
{
|
||||
BaseType_t xReturn;
|
||||
|
||||
traceEVENT_GROUP_CLEAR_BITS_FROM_ISR( xEventGroup, uxBitsToClear );
|
||||
xReturn = xTimerPendFunctionCallFromISR( vEventGroupClearBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToClear, NULL );
|
||||
|
||||
return xReturn;
|
||||
}
|
||||
|
||||
#endif
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
EventBits_t xEventGroupGetBitsFromISR( EventGroupHandle_t xEventGroup )
|
||||
{
|
||||
UBaseType_t uxSavedInterruptStatus;
|
||||
EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
|
||||
EventBits_t uxReturn;
|
||||
|
||||
uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
|
||||
{
|
||||
uxReturn = pxEventBits->uxEventBits;
|
||||
}
|
||||
portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
|
||||
|
||||
return uxReturn;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
EventBits_t xEventGroupSetBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet )
|
||||
{
|
||||
ListItem_t *pxListItem, *pxNext;
|
||||
ListItem_t const *pxListEnd;
|
||||
List_t *pxList;
|
||||
EventBits_t uxBitsToClear = 0, uxBitsWaitedFor, uxControlBits;
|
||||
EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
|
||||
BaseType_t xMatchFound = pdFALSE;
|
||||
|
||||
/* Check the user is not attempting to set the bits used by the kernel
|
||||
itself. */
|
||||
configASSERT( xEventGroup );
|
||||
configASSERT( ( uxBitsToSet & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
|
||||
|
||||
pxList = &( pxEventBits->xTasksWaitingForBits );
|
||||
pxListEnd = listGET_END_MARKER( pxList ); /*lint !e826 !e740 The mini list structure is used as the list end to save RAM. This is checked and valid. */
|
||||
vTaskSuspendAll();
|
||||
{
|
||||
traceEVENT_GROUP_SET_BITS( xEventGroup, uxBitsToSet );
|
||||
|
||||
pxListItem = listGET_HEAD_ENTRY( pxList );
|
||||
|
||||
/* Set the bits. */
|
||||
pxEventBits->uxEventBits |= uxBitsToSet;
|
||||
|
||||
/* See if the new bit value should unblock any tasks. */
|
||||
while( pxListItem != pxListEnd )
|
||||
{
|
||||
pxNext = listGET_NEXT( pxListItem );
|
||||
uxBitsWaitedFor = listGET_LIST_ITEM_VALUE( pxListItem );
|
||||
xMatchFound = pdFALSE;
|
||||
|
||||
/* Split the bits waited for from the control bits. */
|
||||
uxControlBits = uxBitsWaitedFor & eventEVENT_BITS_CONTROL_BYTES;
|
||||
uxBitsWaitedFor &= ~eventEVENT_BITS_CONTROL_BYTES;
|
||||
|
||||
if( ( uxControlBits & eventWAIT_FOR_ALL_BITS ) == ( EventBits_t ) 0 )
|
||||
{
|
||||
/* Just looking for single bit being set. */
|
||||
if( ( uxBitsWaitedFor & pxEventBits->uxEventBits ) != ( EventBits_t ) 0 )
|
||||
{
|
||||
xMatchFound = pdTRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
}
|
||||
else if( ( uxBitsWaitedFor & pxEventBits->uxEventBits ) == uxBitsWaitedFor )
|
||||
{
|
||||
/* All bits are set. */
|
||||
xMatchFound = pdTRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Need all bits to be set, but not all the bits were set. */
|
||||
}
|
||||
|
||||
if( xMatchFound != pdFALSE )
|
||||
{
|
||||
/* The bits match. Should the bits be cleared on exit? */
|
||||
if( ( uxControlBits & eventCLEAR_EVENTS_ON_EXIT_BIT ) != ( EventBits_t ) 0 )
|
||||
{
|
||||
uxBitsToClear |= uxBitsWaitedFor;
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
|
||||
/* Store the actual event flag value in the task's event list
|
||||
item before removing the task from the event list. The
|
||||
eventUNBLOCKED_DUE_TO_BIT_SET bit is set so the task knows
|
||||
that is was unblocked due to its required bits matching, rather
|
||||
than because it timed out. */
|
||||
( void ) xTaskRemoveFromUnorderedEventList( pxListItem, pxEventBits->uxEventBits | eventUNBLOCKED_DUE_TO_BIT_SET );
|
||||
}
|
||||
|
||||
/* Move onto the next list item. Note pxListItem->pxNext is not
|
||||
used here as the list item may have been removed from the event list
|
||||
and inserted into the ready/pending reading list. */
|
||||
pxListItem = pxNext;
|
||||
}
|
||||
|
||||
/* Clear any bits that matched when the eventCLEAR_EVENTS_ON_EXIT_BIT
|
||||
bit was set in the control word. */
|
||||
pxEventBits->uxEventBits &= ~uxBitsToClear;
|
||||
}
|
||||
( void ) xTaskResumeAll();
|
||||
|
||||
return pxEventBits->uxEventBits;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
void vEventGroupDelete( EventGroupHandle_t xEventGroup )
|
||||
{
|
||||
EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
|
||||
const List_t *pxTasksWaitingForBits = &( pxEventBits->xTasksWaitingForBits );
|
||||
|
||||
vTaskSuspendAll();
|
||||
{
|
||||
traceEVENT_GROUP_DELETE( xEventGroup );
|
||||
|
||||
while( listCURRENT_LIST_LENGTH( pxTasksWaitingForBits ) > ( UBaseType_t ) 0 )
|
||||
{
|
||||
/* Unblock the task, returning 0 as the event list is being deleted
|
||||
and cannot therefore have any bits set. */
|
||||
configASSERT( pxTasksWaitingForBits->xListEnd.pxNext != ( ListItem_t * ) &( pxTasksWaitingForBits->xListEnd ) );
|
||||
( void ) xTaskRemoveFromUnorderedEventList( pxTasksWaitingForBits->xListEnd.pxNext, eventUNBLOCKED_DUE_TO_BIT_SET );
|
||||
}
|
||||
|
||||
vPortFree( pxEventBits );
|
||||
}
|
||||
( void ) xTaskResumeAll();
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* For internal use only - execute a 'set bits' command that was pended from
|
||||
an interrupt. */
|
||||
void vEventGroupSetBitsCallback( void *pvEventGroup, const uint32_t ulBitsToSet )
|
||||
{
|
||||
( void ) xEventGroupSetBits( pvEventGroup, ( EventBits_t ) ulBitsToSet );
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
/* For internal use only - execute a 'clear bits' command that was pended from
|
||||
an interrupt. */
|
||||
void vEventGroupClearBitsCallback( void *pvEventGroup, const uint32_t ulBitsToClear )
|
||||
{
|
||||
( void ) xEventGroupClearBits( pvEventGroup, ( EventBits_t ) ulBitsToClear );
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
static BaseType_t prvTestWaitCondition( const EventBits_t uxCurrentEventBits, const EventBits_t uxBitsToWaitFor, const BaseType_t xWaitForAllBits )
|
||||
{
|
||||
BaseType_t xWaitConditionMet = pdFALSE;
|
||||
|
||||
if( xWaitForAllBits == pdFALSE )
|
||||
{
|
||||
/* Task only has to wait for one bit within uxBitsToWaitFor to be
|
||||
set. Is one already set? */
|
||||
if( ( uxCurrentEventBits & uxBitsToWaitFor ) != ( EventBits_t ) 0 )
|
||||
{
|
||||
xWaitConditionMet = pdTRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Task has to wait for all the bits in uxBitsToWaitFor to be set.
|
||||
Are they set already? */
|
||||
if( ( uxCurrentEventBits & uxBitsToWaitFor ) == uxBitsToWaitFor )
|
||||
{
|
||||
xWaitConditionMet = pdTRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
mtCOVERAGE_TEST_MARKER();
|
||||
}
|
||||
}
|
||||
|
||||
return xWaitConditionMet;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) )
|
||||
|
||||
BaseType_t xEventGroupSetBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, BaseType_t *pxHigherPriorityTaskWoken )
|
||||
{
|
||||
BaseType_t xReturn;
|
||||
|
||||
traceEVENT_GROUP_SET_BITS_FROM_ISR( xEventGroup, uxBitsToSet );
|
||||
xReturn = xTimerPendFunctionCallFromISR( vEventGroupSetBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToSet, pxHigherPriorityTaskWoken );
|
||||
|
||||
return xReturn;
|
||||
}
|
||||
|
||||
#endif
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
#if (configUSE_TRACE_FACILITY == 1)
|
||||
|
||||
UBaseType_t uxEventGroupGetNumber( void* xEventGroup )
|
||||
{
|
||||
UBaseType_t xReturn;
|
||||
EventGroup_t *pxEventBits = ( EventGroup_t * ) xEventGroup;
|
||||
|
||||
if( xEventGroup == NULL )
|
||||
{
|
||||
xReturn = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
xReturn = pxEventBits->uxEventGroupNumber;
|
||||
}
|
||||
|
||||
return xReturn;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
Loading…
Add table
Add a link
Reference in a new issue