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/*
* SuperCore Barrier Handler
*
* DESCRIPTION:
*
* This package is part of the implementation of the SuperCore Barrier Handler.
*
* 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.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/corebarrier.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
/*PAGE
*
* _CORE_barrier_Wait
*
* Input parameters:
* the_barrier - pointer to barrier control block
* id - id of object to wait on
* wait - true if wait is allowed, false otherwise
* timeout - number of ticks to wait (0 means forever)
* api_barrier_mp_support - api dependent MP support actions
*
* Output parameters: NONE
*
* INTERRUPT LATENCY:
* available
* wait
*/
void _CORE_barrier_Wait(
CORE_barrier_Control *the_barrier,
Objects_Id id,
bool wait,
Watchdog_Interval timeout,
CORE_barrier_API_mp_support_callout api_barrier_mp_support
)
{
Thread_Control *executing;
ISR_Level level;
executing = _Thread_Executing;
executing->Wait.return_code = CORE_BARRIER_STATUS_SUCCESSFUL;
_ISR_Disable( level );
the_barrier->number_of_waiting_threads++;
if ( _CORE_barrier_Is_automatic( &the_barrier->Attributes ) ) {
if ( the_barrier->number_of_waiting_threads ==
the_barrier->Attributes.maximum_count) {
executing->Wait.return_code = CORE_BARRIER_STATUS_AUTOMATICALLY_RELEASED;
_ISR_Enable( level );
_CORE_barrier_Release( the_barrier, id, api_barrier_mp_support );
return;
}
}
_Thread_queue_Enter_critical_section( &the_barrier->Wait_queue );
executing->Wait.queue = &the_barrier->Wait_queue;
executing->Wait.id = id;
_ISR_Enable( level );
_Thread_queue_Enqueue( &the_barrier->Wait_queue, timeout );
}
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