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/*
* FreeRTOS Kernel V11.1.0
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/* 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
"Arduino_FreeRTOS.h"
#include
"task.h"
#include
"timers.h"
#include
"event_groups.h"
/* 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
/* This entire source file will be skipped if the application is not configured
* to include event groups functionality. This #if is closed at the very bottom
* of this file. If you want to include event groups then ensure
* configUSE_EVENT_GROUPS is set to 1 in FreeRTOSConfig.h. */
#if
(
configUSE_EVENT_GROUPS
==
1
)
typedef
struct
EventGroupDef_t
{
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
#if
( (
configSUPPORT_STATIC_ALLOCATION
==
1
)
&&
(
configSUPPORT_DYNAMIC_ALLOCATION
==
1
) )
uint8_t
ucStaticallyAllocated
;
/**< Set to pdTRUE if the event group is statically allocated to ensure no attempt is made to free the memory. */
#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
)
PRIVILEGED_FUNCTION
;
/*-----------------------------------------------------------*/
#if
(
configSUPPORT_STATIC_ALLOCATION
==
1
)
EventGroupHandle_t
xEventGroupCreateStatic
(
StaticEventGroup_t
*
pxEventGroupBuffer
)
{
EventGroup_t
*
pxEventBits
;
traceENTER_xEventGroupCreateStatic
(
pxEventGroupBuffer
);
/* A StaticEventGroup_t object must be provided. */
configASSERT
(
pxEventGroupBuffer
);
#if
(
configASSERT_DEFINED
==
1
)
{
/* Sanity check that the size of the structure used to declare a
* variable of type StaticEventGroup_t equals the size of the real
* event group structure. */
volatile
size_t
xSize
=
sizeof
(
StaticEventGroup_t
);
configASSERT
(
xSize
==
sizeof
(
EventGroup_t
) );
}
#endif
/* configASSERT_DEFINED */
/* The user has provided a statically allocated event group - use it. */
/* MISRA Ref 11.3.1 [Misaligned access] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-113 */
/* coverity[misra_c_2012_rule_11_3_violation] */
pxEventBits
=
(
EventGroup_t
*
)
pxEventGroupBuffer
;
if
(
pxEventBits
!=
NULL
)
{
pxEventBits
->
uxEventBits
=
0
;
vListInitialise
(
&
(
pxEventBits
->
xTasksWaitingForBits
) );
#if
(
configSUPPORT_DYNAMIC_ALLOCATION
==
1
)
{
/* Both static and dynamic allocation can be used, so note that
* this event group was created statically in case the event group
* is later deleted. */
pxEventBits
->
ucStaticallyAllocated
=
pdTRUE
;
}
#endif
/* configSUPPORT_DYNAMIC_ALLOCATION */
traceEVENT_GROUP_CREATE
(
pxEventBits
);
}
else
{
/* xEventGroupCreateStatic should only ever be called with
* pxEventGroupBuffer pointing to a pre-allocated (compile time
* allocated) StaticEventGroup_t variable. */
traceEVENT_GROUP_CREATE_FAILED
();
}
traceRETURN_xEventGroupCreateStatic
(
pxEventBits
);
return
pxEventBits
;
}
#endif
/* configSUPPORT_STATIC_ALLOCATION */
/*-----------------------------------------------------------*/
#if
(
configSUPPORT_DYNAMIC_ALLOCATION
==
1
)
EventGroupHandle_t
xEventGroupCreate
(
void
)
{
EventGroup_t
*
pxEventBits
;
traceENTER_xEventGroupCreate
();
/* MISRA Ref 11.5.1 [Malloc memory assignment] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-115 */
/* coverity[misra_c_2012_rule_11_5_violation] */
pxEventBits
=
(
EventGroup_t
*
)
pvPortMalloc
(
sizeof
(
EventGroup_t
) );
if
(
pxEventBits
!=
NULL
)
{
pxEventBits
->
uxEventBits
=
0
;
vListInitialise
(
&
(
pxEventBits
->
xTasksWaitingForBits
) );
#if
(
configSUPPORT_STATIC_ALLOCATION
==
1
)
{
/* Both static and dynamic allocation can be used, so note this
* event group was allocated statically in case the event group is
* later deleted. */
pxEventBits
->
ucStaticallyAllocated
=
pdFALSE
;
}
#endif
/* configSUPPORT_STATIC_ALLOCATION */
traceEVENT_GROUP_CREATE
(
pxEventBits
);
}
else
{
traceEVENT_GROUP_CREATE_FAILED
();
}
traceRETURN_xEventGroupCreate
(
pxEventBits
);
return
pxEventBits
;
}
#endif
/* configSUPPORT_DYNAMIC_ALLOCATION */
/*-----------------------------------------------------------*/
EventBits_t
xEventGroupSync
(
EventGroupHandle_t
xEventGroup
,
const
EventBits_t
uxBitsToSet
,
const
EventBits_t
uxBitsToWaitFor
,
TickType_t
xTicksToWait
)
{
EventBits_t
uxOriginalBitValue
,
uxReturn
;
EventGroup_t
*
pxEventBits
=
xEventGroup
;
BaseType_t
xAlreadyYielded
;
BaseType_t
xTimeoutOccurred
=
pdFALSE
;
traceENTER_xEventGroupSync
(
xEventGroup
,
uxBitsToSet
,
uxBitsToWaitFor
,
xTicksToWait
);
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
;
xTimeoutOccurred
=
pdTRUE
;
}
}
}
xAlreadyYielded
=
xTaskResumeAll
();
if
(
xTicksToWait
!=
(
TickType_t
)
0
)
{
if
(
xAlreadyYielded
==
pdFALSE
)
{
taskYIELD_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
);
/* Prevent compiler warnings when trace macros are not used. */
(
void
)
xTimeoutOccurred
;
traceRETURN_xEventGroupSync
(
uxReturn
);
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
=
xEventGroup
;
EventBits_t
uxReturn
,
uxControlBits
=
0
;
BaseType_t
xWaitConditionMet
,
xAlreadyYielded
;
BaseType_t
xTimeoutOccurred
=
pdFALSE
;
traceENTER_xEventGroupWaitBits
(
xEventGroup
,
uxBitsToWaitFor
,
xClearOnExit
,
xWaitForAllBits
,
xTicksToWait
);
/* 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
;
xTimeoutOccurred
=
pdTRUE
;
}
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
)
{
taskYIELD_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
();
}
xTimeoutOccurred
=
pdTRUE
;
}
taskEXIT_CRITICAL
();
}
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
);
/* Prevent compiler warnings when trace macros are not used. */
(
void
)
xTimeoutOccurred
;
traceRETURN_xEventGroupWaitBits
(
uxReturn
);
return
uxReturn
;
}
/*-----------------------------------------------------------*/
EventBits_t
xEventGroupClearBits
(
EventGroupHandle_t
xEventGroup
,
const
EventBits_t
uxBitsToClear
)
{
EventGroup_t
*
pxEventBits
=
xEventGroup
;
EventBits_t
uxReturn
;
traceENTER_xEventGroupClearBits
(
xEventGroup
,
uxBitsToClear
);
/* 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
();
traceRETURN_xEventGroupClearBits
(
uxReturn
);
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
;
traceENTER_xEventGroupClearBitsFromISR
(
xEventGroup
,
uxBitsToClear
);
traceEVENT_GROUP_CLEAR_BITS_FROM_ISR
(
xEventGroup
,
uxBitsToClear
);
xReturn
=
xTimerPendFunctionCallFromISR
(
vEventGroupClearBitsCallback
, (
void
*
)
xEventGroup
, (
uint32_t
)
uxBitsToClear
,
NULL
);
traceRETURN_xEventGroupClearBitsFromISR
(
xReturn
);
return
xReturn
;
}
#endif
/* if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) ) */
/*-----------------------------------------------------------*/
EventBits_t
xEventGroupGetBitsFromISR
(
EventGroupHandle_t
xEventGroup
)
{
UBaseType_t
uxSavedInterruptStatus
;
EventGroup_t
const
*
const
pxEventBits
=
xEventGroup
;
EventBits_t
uxReturn
;
traceENTER_xEventGroupGetBitsFromISR
(
xEventGroup
);
/* MISRA Ref 4.7.1 [Return value shall be checked] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#dir-47 */
/* coverity[misra_c_2012_directive_4_7_violation] */
uxSavedInterruptStatus
=
taskENTER_CRITICAL_FROM_ISR
();
{
uxReturn
=
pxEventBits
->
uxEventBits
;
}
taskEXIT_CRITICAL_FROM_ISR
(
uxSavedInterruptStatus
);
traceRETURN_xEventGroupGetBitsFromISR
(
uxReturn
);
return
uxReturn
;
}
/*-----------------------------------------------------------*/
EventBits_t
xEventGroupSetBits
(
EventGroupHandle_t
xEventGroup
,
const
EventBits_t
uxBitsToSet
)
{
ListItem_t
*
pxListItem
;
ListItem_t
*
pxNext
;
ListItem_t
const
*
pxListEnd
;
List_t
const
*
pxList
;
EventBits_t
uxBitsToClear
=
0
,
uxBitsWaitedFor
,
uxControlBits
;
EventGroup_t
*
pxEventBits
=
xEventGroup
;
BaseType_t
xMatchFound
=
pdFALSE
;
traceENTER_xEventGroupSetBits
(
xEventGroup
,
uxBitsToSet
);
/* 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
);
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. */
vTaskRemoveFromUnorderedEventList
(
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
();
traceRETURN_xEventGroupSetBits
(
pxEventBits
->
uxEventBits
);
return
pxEventBits
->
uxEventBits
;
}
/*-----------------------------------------------------------*/
void
vEventGroupDelete
(
EventGroupHandle_t
xEventGroup
)
{
EventGroup_t
*
pxEventBits
=
xEventGroup
;
const
List_t
*
pxTasksWaitingForBits
;
traceENTER_vEventGroupDelete
(
xEventGroup
);
configASSERT
(
pxEventBits
);
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
!=
(
const
ListItem_t
*
)
&
(
pxTasksWaitingForBits
->
xListEnd
) );
vTaskRemoveFromUnorderedEventList
(
pxTasksWaitingForBits
->
xListEnd
.
pxNext
,
eventUNBLOCKED_DUE_TO_BIT_SET
);
}
}
(
void
)
xTaskResumeAll
();
#if
( (
configSUPPORT_DYNAMIC_ALLOCATION
==
1
)
&&
(
configSUPPORT_STATIC_ALLOCATION
==
0
) )
{
/* The event group can only have been allocated dynamically - free
* it again. */
vPortFree
(
pxEventBits
);
}
#elif
( (
configSUPPORT_DYNAMIC_ALLOCATION
==
1
)
&&
(
configSUPPORT_STATIC_ALLOCATION
==
1
) )
{
/* The event group could have been allocated statically or
* dynamically, so check before attempting to free the memory. */
if
(
pxEventBits
->
ucStaticallyAllocated
==
(
uint8_t
)
pdFALSE
)
{
vPortFree
(
pxEventBits
);
}
else
{
mtCOVERAGE_TEST_MARKER
();
}
}
#endif
/* configSUPPORT_DYNAMIC_ALLOCATION */
traceRETURN_vEventGroupDelete
();
}
/*-----------------------------------------------------------*/
#if
(
configSUPPORT_STATIC_ALLOCATION
==
1
)
BaseType_t
xEventGroupGetStaticBuffer
(
EventGroupHandle_t
xEventGroup
,
StaticEventGroup_t
*
*
ppxEventGroupBuffer
)
{
BaseType_t
xReturn
;
EventGroup_t
*
pxEventBits
=
xEventGroup
;
traceENTER_xEventGroupGetStaticBuffer
(
xEventGroup
,
ppxEventGroupBuffer
);
configASSERT
(
pxEventBits
);
configASSERT
(
ppxEventGroupBuffer
);
#if
(
configSUPPORT_DYNAMIC_ALLOCATION
==
1
)
{
/* Check if the event group was statically allocated. */
if
(
pxEventBits
->
ucStaticallyAllocated
==
(
uint8_t
)
pdTRUE
)
{
/* MISRA Ref 11.3.1 [Misaligned access] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-113 */
/* coverity[misra_c_2012_rule_11_3_violation] */
*
ppxEventGroupBuffer
=
(
StaticEventGroup_t
*
)
pxEventBits
;
xReturn
=
pdTRUE
;
}
else
{
xReturn
=
pdFALSE
;
}
}
#else
/* configSUPPORT_DYNAMIC_ALLOCATION */
{
/* Event group must have been statically allocated. */
/* MISRA Ref 11.3.1 [Misaligned access] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-113 */
/* coverity[misra_c_2012_rule_11_3_violation] */
*
ppxEventGroupBuffer
=
(
StaticEventGroup_t
*
)
pxEventBits
;
xReturn
=
pdTRUE
;
}
#endif
/* configSUPPORT_DYNAMIC_ALLOCATION */
traceRETURN_xEventGroupGetStaticBuffer
(
xReturn
);
return
xReturn
;
}
#endif
/* configSUPPORT_STATIC_ALLOCATION */
/*-----------------------------------------------------------*/
/* For internal use only - execute a 'set bits' command that was pended from
* an interrupt. */
void
vEventGroupSetBitsCallback
(
void
*
pvEventGroup
,
uint32_t
ulBitsToSet
)
{
traceENTER_vEventGroupSetBitsCallback
(
pvEventGroup
,
ulBitsToSet
);
/* MISRA Ref 11.5.4 [Callback function parameter] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-115 */
/* coverity[misra_c_2012_rule_11_5_violation] */
(
void
)
xEventGroupSetBits
(
pvEventGroup
, (
EventBits_t
)
ulBitsToSet
);
traceRETURN_vEventGroupSetBitsCallback
();
}
/*-----------------------------------------------------------*/
/* For internal use only - execute a 'clear bits' command that was pended from
* an interrupt. */
void
vEventGroupClearBitsCallback
(
void
*
pvEventGroup
,
uint32_t
ulBitsToClear
)
{
traceENTER_vEventGroupClearBitsCallback
(
pvEventGroup
,
ulBitsToClear
);
/* MISRA Ref 11.5.4 [Callback function parameter] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-115 */
/* coverity[misra_c_2012_rule_11_5_violation] */
(
void
)
xEventGroupClearBits
(
pvEventGroup
, (
EventBits_t
)
ulBitsToClear
);
traceRETURN_vEventGroupClearBitsCallback
();
}
/*-----------------------------------------------------------*/
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
;
traceENTER_xEventGroupSetBitsFromISR
(
xEventGroup
,
uxBitsToSet
,
pxHigherPriorityTaskWoken
);
traceEVENT_GROUP_SET_BITS_FROM_ISR
(
xEventGroup
,
uxBitsToSet
);
xReturn
=
xTimerPendFunctionCallFromISR
(
vEventGroupSetBitsCallback
, (
void
*
)
xEventGroup
, (
uint32_t
)
uxBitsToSet
,
pxHigherPriorityTaskWoken
);
traceRETURN_xEventGroupSetBitsFromISR
(
xReturn
);
return
xReturn
;
}
#endif
/* if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) ) */
/*-----------------------------------------------------------*/
#if
(
configUSE_TRACE_FACILITY
==
1
)
UBaseType_t
uxEventGroupGetNumber
(
void
*
xEventGroup
)
{
UBaseType_t
xReturn
;
/* MISRA Ref 11.5.2 [Opaque pointer] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-115 */
/* coverity[misra_c_2012_rule_11_5_violation] */
EventGroup_t
const
*
pxEventBits
=
(
EventGroup_t
*
)
xEventGroup
;
traceENTER_uxEventGroupGetNumber
(
xEventGroup
);
if
(
xEventGroup
==
NULL
)
{
xReturn
=
0
;
}
else
{
xReturn
=
pxEventBits
->
uxEventGroupNumber
;
}
traceRETURN_uxEventGroupGetNumber
(
xReturn
);
return
xReturn
;
}
#endif
/* configUSE_TRACE_FACILITY */
/*-----------------------------------------------------------*/
#if
(
configUSE_TRACE_FACILITY
==
1
)
void
vEventGroupSetNumber
(
void
*
xEventGroup
,
UBaseType_t
uxEventGroupNumber
)
{
traceENTER_vEventGroupSetNumber
(
xEventGroup
,
uxEventGroupNumber
);
/* MISRA Ref 11.5.2 [Opaque pointer] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-115 */
/* coverity[misra_c_2012_rule_11_5_violation] */
( (
EventGroup_t
*
)
xEventGroup
)
->
uxEventGroupNumber
=
uxEventGroupNumber
;
traceRETURN_vEventGroupSetNumber
();
}
#endif
/* configUSE_TRACE_FACILITY */
/*-----------------------------------------------------------*/
/* This entire source file will be skipped if the application is not configured
* to include event groups functionality. If you want to include event groups
* then ensure configUSE_EVENT_GROUPS is set to 1 in FreeRTOSConfig.h. */
#endif
/* configUSE_EVENT_GROUPS == 1 */
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