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/**
* @file
*
* @brief Inlined Routines Associated with the SuperCore Barrier
*
* This include file contains all of the inlined routines associated
* with the SuperCore barrier.
*/
/*
* COPYRIGHT (c) 1989-2006.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef _RTEMS_SCORE_COREBARRIERIMPL_H
#define _RTEMS_SCORE_COREBARRIERIMPL_H
#include <rtems/score/corebarrier.h>
#include <rtems/score/status.h>
#include <rtems/score/threadqimpl.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @addtogroup ScoreBarrier
*/
/**@{**/
#define CORE_BARRIER_TQ_OPERATIONS &_Thread_queue_Operations_FIFO
/**
* @brief Initialize core barrier.
*
* This routine initializes the barrier based on the parameters passed.
*
* @param[in] the_barrier is the barrier to initialize
* @param[in] the_barrier_attributes define the behavior of this instance
*/
void _CORE_barrier_Initialize(
CORE_barrier_Control *the_barrier,
CORE_barrier_Attributes *the_barrier_attributes
);
RTEMS_INLINE_ROUTINE void _CORE_barrier_Destroy(
CORE_barrier_Control *the_barrier
)
{
_Thread_queue_Destroy( &the_barrier->Wait_queue );
}
RTEMS_INLINE_ROUTINE void _CORE_barrier_Acquire_critical(
CORE_barrier_Control *the_barrier,
Thread_queue_Context *queue_context
)
{
_Thread_queue_Acquire_critical( &the_barrier->Wait_queue, queue_context );
}
RTEMS_INLINE_ROUTINE void _CORE_barrier_Release(
CORE_barrier_Control *the_barrier,
Thread_queue_Context *queue_context
)
{
_Thread_queue_Release( &the_barrier->Wait_queue, queue_context );
}
/**
* @brief Wait for the barrier.
*
* This routine wait for the barrier to be released. If the barrier
* is set to automatic and this is the appropriate thread, then it returns
* immediately. Otherwise, the calling thread is blocked until the barrier
* is released.
*
* @param[in] the_barrier is the barrier to wait for
* @param[in,out] executing The currently executing thread.
* @param[in] wait is true if the calling thread is willing to wait
*
* @return The method status.
*/
Status_Control _CORE_barrier_Seize(
CORE_barrier_Control *the_barrier,
Thread_Control *executing,
bool wait,
Thread_queue_Context *queue_context
);
uint32_t _CORE_barrier_Do_flush(
CORE_barrier_Control *the_barrier,
Thread_queue_Flush_filter filter,
Thread_queue_Context *queue_context
);
/**
* @brief Manually release the barrier.
*
* This routine manually releases the barrier. All of the threads waiting
* for the barrier will be readied.
*
* @param[in] the_barrier is the barrier to surrender
* @param[in] mp_callout is the routine to invoke if the
* thread unblocked is remote
*
* @retval the number of unblocked threads
*/
RTEMS_INLINE_ROUTINE uint32_t _CORE_barrier_Surrender(
CORE_barrier_Control *the_barrier,
Thread_queue_Context *queue_context
)
{
return _CORE_barrier_Do_flush(
the_barrier,
_Thread_queue_Flush_default_filter,
queue_context
);
}
RTEMS_INLINE_ROUTINE void _CORE_barrier_Flush(
CORE_barrier_Control *the_barrier,
Thread_queue_Context *queue_context
)
{
_CORE_barrier_Do_flush(
the_barrier,
_Thread_queue_Flush_status_object_was_deleted,
queue_context
);
}
/**
* This function returns true if the automatic release attribute is
* enabled in the @a attribute_set and false otherwise.
*
* @param[in] the_attribute is the attribute set to test
*
* @return true if the priority attribute is enabled
*/
RTEMS_INLINE_ROUTINE bool _CORE_barrier_Is_automatic(
CORE_barrier_Attributes *the_attribute
)
{
return
(the_attribute->discipline == CORE_BARRIER_AUTOMATIC_RELEASE);
}
/**
* This routine returns the number of threads currently waiting at the barrier.
*
* @param[in] the_barrier is the barrier to obtain the number of blocked
* threads for
* @return the current count of this barrier
*/
RTEMS_INLINE_ROUTINE uint32_t _CORE_barrier_Get_number_of_waiting_threads(
CORE_barrier_Control *the_barrier
)
{
return the_barrier->number_of_waiting_threads;
}
/** @} */
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
|
