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Update xTaskGetIdleTaskHandle() For SMP (#868)

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* Update xTaskGetIdleTaskHandle() in SMP

This commit updates xTaskGetIdleTaskHandle() for SMP in the following ways:

- xTaskGetIdleTaskHandle() no longer accepts xCoreID argument in SMP so that
there is not change in API between single-core and SMP
- xTaskGetIdleTaskHandle() now returns the Active idle task handle in SMP,
which matches the behavior in single-core.
- Added xTaskGetIdleTaskHandleForCore() in SMP which accepts an xCoreID
argument. This function can be used to obtain the Passive idle task handles.

* Update xTaskGetIdleTaskHandle

---------

Co-authored-by: Ching-Hsin Lee <chinglee@amazon.com>
Co-authored-by: chinglee-iot <61685396+chinglee-iot@users.noreply.github.com>
Co-authored-by: Rahul Kar <118818625+kar-rahul-aws@users.noreply.github.com>
Co-authored-by: Gaurav-Aggarwal-AWS <33462878+aggarg@users.noreply.github.com>
This commit is contained in:
Darian 2023-12-05 14:31:11 +08:00 committed by GitHub
parent c0ce725293
commit cd5c774b2b
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 35 additions and 34 deletions
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16
include/FreeRTOS.h
View file

@ -1886,14 +1886,20 @@
#ifndef traceENTER_xTaskGetIdleTaskHandle
#define traceENTER_xTaskGetIdleTaskHandle()
#endif
#else
#ifndef traceENTER_xTaskGetIdleTaskHandle
#define traceENTER_xTaskGetIdleTaskHandle( xCoreID )
#endif
#if ( configNUMBER_OF_CORES == 1 )
#ifndef traceRETURN_xTaskGetIdleTaskHandle
#define traceRETURN_xTaskGetIdleTaskHandle( xIdleTaskHandle )
#endif
#endif
#ifndef traceRETURN_xTaskGetIdleTaskHandle
#define traceRETURN_xTaskGetIdleTaskHandle( xIdleTaskHandle )
#ifndef traceENTER_xTaskGetIdleTaskHandleForCore
#define traceENTER_xTaskGetIdleTaskHandleForCore( xCoreID )
#endif
#ifndef traceRETURN_xTaskGetIdleTaskHandleForCore
#define traceRETURN_xTaskGetIdleTaskHandleForCore( xIdleTaskHandle )
#endif
#ifndef traceENTER_vTaskStepTick

17
include/task.h
View file

@ -2030,24 +2030,23 @@ BaseType_t xTaskCallApplicationTaskHook( TaskHandle_t xTask,
* xTaskGetIdleTaskHandle() is only available if
* INCLUDE_xTaskGetIdleTaskHandle is set to 1 in FreeRTOSConfig.h.
*
* Simply returns the handle of the idle task. It is not valid to call
* xTaskGetIdleTaskHandle() before the scheduler has been started.
* In single-core FreeRTOS, this function simply returns the handle of the idle
* task. It is not valid to call xTaskGetIdleTaskHandle() before the scheduler
* has been started.
*
* In the FreeRTOS SMP, there are a total of configNUMBER_OF_CORES idle tasks:
* 1. 1 Active idle task which does all the housekeeping.
* 2. ( configNUMBER_OF_CORES - 1 ) Passive idle tasks which do nothing.
* These idle tasks are created to ensure that each core has an idle task to run when
* no other task is available to run.
*
* Set xCoreID to 0 to get the Active idle task handle. Set xCoreID to
* 1,2 ... ( configNUMBER_OF_CORES - 1 ) to get the Passive idle task
* handles.
* no other task is available to run. Call xTaskGetIdleTaskHandle() or
* xTaskGetIdleTaskHandleForCore() with xCoreID set to 0 to get the Active
* idle task handle. Call xTaskGetIdleTaskHandleForCore() with xCoreID set to
* 1,2 ... ( configNUMBER_OF_CORES - 1 ) to get the Passive idle task handles.
*/
#if ( configNUMBER_OF_CORES == 1 )
TaskHandle_t xTaskGetIdleTaskHandle( void ) PRIVILEGED_FUNCTION;
#else /* #if ( configNUMBER_OF_CORES == 1 ) */
TaskHandle_t xTaskGetIdleTaskHandle( BaseType_t xCoreID ) PRIVILEGED_FUNCTION;
#endif /* #if ( configNUMBER_OF_CORES == 1 ) */
TaskHandle_t xTaskGetIdleTaskHandleForCore( BaseType_t xCoreID ) PRIVILEGED_FUNCTION;
/**
* configUSE_TRACE_FACILITY must be defined as 1 in FreeRTOSConfig.h for

12
tasks.c
View file

@ -4472,7 +4472,6 @@ char * pcTaskGetName( TaskHandle_t xTaskToQuery ) /*lint !e971 Unqualified char
#if ( INCLUDE_xTaskGetIdleTaskHandle == 1 )
#if ( configNUMBER_OF_CORES == 1 )
TaskHandle_t xTaskGetIdleTaskHandle( void )
{
traceENTER_xTaskGetIdleTaskHandle();
@ -4485,12 +4484,11 @@ char * pcTaskGetName( TaskHandle_t xTaskToQuery ) /*lint !e971 Unqualified char
return xIdleTaskHandles[ 0 ];
}
#endif /* if ( configNUMBER_OF_CORES == 1 ) */
#else /* if ( configNUMBER_OF_CORES == 1 ) */
TaskHandle_t xTaskGetIdleTaskHandle( BaseType_t xCoreID )
TaskHandle_t xTaskGetIdleTaskHandleForCore( BaseType_t xCoreID )
{
traceENTER_xTaskGetIdleTaskHandle( xCoreID );
traceENTER_xTaskGetIdleTaskHandleForCore( xCoreID );
/* Ensure the core ID is valid. */
configASSERT( taskVALID_CORE_ID( xCoreID ) == pdTRUE );
@ -4499,13 +4497,11 @@ char * pcTaskGetName( TaskHandle_t xTaskToQuery ) /*lint !e971 Unqualified char
* started, then xIdleTaskHandles will be NULL. */
configASSERT( ( xIdleTaskHandles[ xCoreID ] != NULL ) );
traceRETURN_xTaskGetIdleTaskHandle( xIdleTaskHandles[ xCoreID ] );
traceRETURN_xTaskGetIdleTaskHandleForCore( xIdleTaskHandles[ xCoreID ] );
return xIdleTaskHandles[ xCoreID ];
}
#endif /* if ( configNUMBER_OF_CORES == 1 ) */
#endif /* INCLUDE_xTaskGetIdleTaskHandle */
/*----------------------------------------------------------*/