source: rtems/cpukit/score/src/corebarrierwait.c @ 7d9a426

/**
 *  @file
 *
 *  @brief Wait For The Barrier
 *  @ingroup ScoreBarrier
 */

/*
 *  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.
 */

#if HAVE_CONFIG_H
#include "config.h"
#endif

#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/corebarrierimpl.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>

void _CORE_barrier_Wait(
  CORE_barrier_Control                *the_barrier,
  Thread_Control                      *executing,
  Objects_Id                           id,
  bool                                 wait,
  Watchdog_Interval                    timeout,
  CORE_barrier_API_mp_support_callout  api_barrier_mp_support
)
{
  ISR_Level       level;

  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 );
}