event_groups.h

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    ***************************************************************************
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    ***************************************************************************

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*/

#ifndef EVENT_GROUPS_H
#define EVENT_GROUPS_H

#ifndef INC_FREERTOS_H
    #error "include FreeRTOS.h" must appear in source files before "include event_groups.h"
#endif

#include "timers.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef void * EventGroupHandle_t;

/* 
 * The type that holds event bits always matches TickType_t - therefore the
 * number of bits it holds is set by configUSE_16_BIT_TICKS (16 bits if set to 1,
 * 32 bits if set to 0. 
 *
 * \defgroup EventBits_t EventBits_t
 * \ingroup EventGroup
 */
typedef TickType_t EventBits_t;

EventGroupHandle_t xEventGroupCreate( void ) PRIVILEGED_FUNCTION;

EventBits_t xEventGroupWaitBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToWaitFor, const BaseType_t xClearOnExit, const BaseType_t xWaitForAllBits, TickType_t xTicksToWait ) PRIVILEGED_FUNCTION;

EventBits_t xEventGroupClearBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToClear ) PRIVILEGED_FUNCTION;

#if( configUSE_TRACE_FACILITY == 1 )
    BaseType_t xEventGroupClearBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet ) PRIVILEGED_FUNCTION;
#else
    #define xEventGroupClearBitsFromISR( xEventGroup, uxBitsToClear ) xTimerPendFunctionCallFromISR( vEventGroupClearBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToClear, NULL )
#endif

EventBits_t xEventGroupSetBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet ) PRIVILEGED_FUNCTION;

#if( configUSE_TRACE_FACILITY == 1 )
    BaseType_t xEventGroupSetBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, BaseType_t *pxHigherPriorityTaskWoken ) PRIVILEGED_FUNCTION;
#else
    #define xEventGroupSetBitsFromISR( xEventGroup, uxBitsToSet, pxHigherPriorityTaskWoken ) xTimerPendFunctionCallFromISR( vEventGroupSetBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToSet, pxHigherPriorityTaskWoken )
#endif

EventBits_t xEventGroupSync( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, const EventBits_t uxBitsToWaitFor, TickType_t xTicksToWait ) PRIVILEGED_FUNCTION;


#define xEventGroupGetBits( xEventGroup ) xEventGroupClearBits( xEventGroup, 0 )

EventBits_t xEventGroupGetBitsFromISR( EventGroupHandle_t xEventGroup ) PRIVILEGED_FUNCTION;

void vEventGroupDelete( EventGroupHandle_t xEventGroup ) PRIVILEGED_FUNCTION;

/* For internal use only. */
void vEventGroupSetBitsCallback( void *pvEventGroup, const uint32_t ulBitsToSet ) PRIVILEGED_FUNCTION;
void vEventGroupClearBitsCallback( void *pvEventGroup, const uint32_t ulBitsToClear ) PRIVILEGED_FUNCTION;

#if (configUSE_TRACE_FACILITY == 1)
    UBaseType_t uxEventGroupGetNumber( void* xEventGroup ) PRIVILEGED_FUNCTION;
#endif

#ifdef __cplusplus
}
#endif

#endif /* EVENT_GROUPS_H */