Diff: FreeRTOS_V8_2_1/source/event_groups.c

Revision:

3:a8c249046181

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FreeRTOS_V8_2_1/source/event_groups.c	Thu Sep 03 14:02:37 2015 +0000
@@ -0,0 +1,684 @@
+/*
+    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
+
+