task2.c

来自「RTEMS (Real-Time Executive for Multiproc」· C语言 代码 · 共 47 行

/*  Test_task2
 *
 *  This task attempts to receive control of a global semaphore.
 *  It should never receive control of the semaphore.
 *
 *  Input parameters:
 *    argument - task argument
 *
 *  Output parameters:  NONE
 *
 *  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.rtems.com/license/LICENSE.
 *
 *  $Id: task2.c,v 1.7.8.1 2003/09/04 18:46:18 joel Exp $
 */

#include "system.h"

rtems_task Test_task2(
  rtems_task_argument argument
)
{
  rtems_status_code status;

  puts( "Getting SMID of semaphore" );

  do {
    status = rtems_semaphore_ident(
      Semaphore_name[ 1 ],
      RTEMS_SEARCH_ALL_NODES,
      &Semaphore_id[ 1 ]
    );
  } while ( !rtems_is_status_successful( status ) );

  puts( "Attempting to acquire semaphore ..." );
  status = rtems_semaphore_obtain(
    Semaphore_id[ 1 ],
    RTEMS_DEFAULT_OPTIONS,
    RTEMS_NO_TIMEOUT
  );
  directive_failed( status, "rtems_semaphore_obtain" );
}