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/**
* @file
*
* @brief Inlined Routines Associated with the SuperCore Semaphore
*
* This include file contains all of the inlined routines associated
* with the SuperCore semaphore.
*/
/*
* 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.com/license/LICENSE.
*/
#ifndef _RTEMS_SCORE_CORESEM_H
# error "Never use <rtems/score/coresem.inl> directly; include <rtems/score/coresem.h> instead."
#endif
#ifndef _RTEMS_SCORE_CORESEM_INL
#define _RTEMS_SCORE_CORESEM_INL
/**
* @addtogroup ScoreSemaphore
*
* @{
*/
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
/**
* This function returns true if the priority 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_semaphore_Is_priority(
CORE_semaphore_Attributes *the_attribute
)
{
return ( the_attribute->discipline == CORE_SEMAPHORE_DISCIPLINES_PRIORITY );
}
/**
* This routine returns the current count associated with the semaphore.
*
* @param[in] the_semaphore is the semaphore to obtain the count of
*
* @return the current count of this semaphore
*/
RTEMS_INLINE_ROUTINE uint32_t _CORE_semaphore_Get_count(
CORE_semaphore_Control *the_semaphore
)
{
return the_semaphore->count;
}
/**
* This routine attempts to receive a unit from the_semaphore.
* If a unit is available or if the wait flag is false, then the routine
* returns. Otherwise, the calling task is blocked until a unit becomes
* available.
*
* @param[in] the_semaphore is the semaphore to obtain
* @param[in] id is the Id of the owning API level Semaphore object
* @param[in] wait is true if the thread is willing to wait
* @param[in] timeout is the maximum number of ticks to block
* @param[in] level_p is a temporary variable used to contain the ISR
* disable level cookie
*
* @note There is currently no MACRO version of this routine.
*/
RTEMS_INLINE_ROUTINE void _CORE_semaphore_Seize_isr_disable(
CORE_semaphore_Control *the_semaphore,
Objects_Id id,
bool wait,
Watchdog_Interval timeout,
ISR_Level *level_p
)
{
Thread_Control *executing;
/* disabled when you get here */
executing = _Thread_Executing;
executing->Wait.return_code = CORE_SEMAPHORE_STATUS_SUCCESSFUL;
if ( the_semaphore->count != 0 ) {
the_semaphore->count -= 1;
_ISR_Enable( *level_p );
return;
}
if ( !wait ) {
_ISR_Enable( *level_p );
executing->Wait.return_code = CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT;
return;
}
_Thread_Disable_dispatch();
_Thread_queue_Enter_critical_section( &the_semaphore->Wait_queue );
executing->Wait.queue = &the_semaphore->Wait_queue;
executing->Wait.id = id;
_ISR_Enable( *level_p );
_Thread_queue_Enqueue( &the_semaphore->Wait_queue, timeout );
_Thread_Enable_dispatch();
}
/** @} */
#endif
/* end of include file */
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