source: rtems/cpukit/score/src/threadqprocesstimeout.c @ 4fc370e

/**
 * @file
 * 
 * @brief Thread Queue Handler Process Timeout Handler
 * @ingroup ScoreThreadQ
 */

/*
 *  COPYRIGHT (c) 1989-2008.
 *  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/chain.h>
#include <rtems/score/isr.h>
#include <rtems/score/object.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#include <rtems/score/tqdata.h>

void _Thread_queue_Process_timeout(
  Thread_Control *the_thread
)
{
  Thread_queue_Control *the_thread_queue = the_thread->Wait.queue;

  /*
   *  If the_thread_queue is not synchronized, then it is either
   *  "nothing happened", "timeout", or "satisfied".   If the_thread
   *  is the executing thread, then it is in the process of blocking
   *  and it is the thread which is responsible for the synchronization
   *  process.
   *
   *  If it is not satisfied, then it is "nothing happened" and
   *  this is the "timeout" transition.  After a request is satisfied,
   *  a timeout is not allowed to occur.
   */

  if ( the_thread_queue->sync_state != THREAD_BLOCKING_OPERATION_SYNCHRONIZED &&
       _Thread_Is_executing( the_thread ) ) {
    if ( the_thread_queue->sync_state != THREAD_BLOCKING_OPERATION_SATISFIED ) {
      the_thread->Wait.return_code = the_thread->Wait.queue->timeout_status;
      the_thread_queue->sync_state = THREAD_BLOCKING_OPERATION_TIMEOUT;
    }
  } else {
    the_thread->Wait.return_code = the_thread->Wait.queue->timeout_status;
    _Thread_queue_Extract( the_thread->Wait.queue, the_thread );
  }
}