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/* inline/coresem.inl
*
* This include file contains all of the inlined routines associated
* with the CORE semaphore.
*
* COPYRIGHT (c) 1989-1999.
* 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.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#ifndef __INLINE_CORE_SEMAPHORE_inl
#define __INLINE_CORE_SEMAPHORE_inl
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
/*PAGE
*
* _CORE_semaphore_Is_priority
*
* DESCRIPTION:
*
* This function returns TRUE if the priority attribute is
* enabled in the attribute_set and FALSE otherwise.
*/
RTEMS_INLINE_ROUTINE boolean _CORE_semaphore_Is_priority(
CORE_semaphore_Attributes *the_attribute
)
{
return ( the_attribute->discipline == CORE_SEMAPHORE_DISCIPLINES_PRIORITY );
}
/*PAGE
*
* _CORE_semaphore_Get_count
*
* DESCRIPTION:
*
* This routine returns the current count associated with the semaphore.
*/
RTEMS_INLINE_ROUTINE unsigned32 _CORE_semaphore_Get_count(
CORE_semaphore_Control *the_semaphore
)
{
return the_semaphore->count;
}
/*PAGE
*
* _CORE_semaphore_Seize_isr_disable
*
* DESCRIPTION:
*
* 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.
*
* 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,
boolean wait,
Watchdog_Interval timeout,
ISR_Level *level_p
)
{
Thread_Control *executing;
ISR_Level level = *level_p;
/* 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 );
return;
}
if ( !wait ) {
_ISR_Enable( level );
executing->Wait.return_code = CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT;
return;
}
_Thread_Disable_dispatch();
_ISR_Enable( level );
_Thread_queue_Enter_critical_section( &the_semaphore->Wait_queue );
executing->Wait.queue = &the_semaphore->Wait_queue;
executing->Wait.id = id;
_ISR_Enable( level );
_Thread_queue_Enqueue( &the_semaphore->Wait_queue, timeout );
_Thread_Enable_dispatch();
}
#endif
#endif
/* end of include file */
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