Subversion Repositories openrisc_me

/*

 *  $Id: mutexlocksupp.c,v 1.2 2001-09-27 11:59:17 chris Exp $

 */

#include <assert.h>

#include <errno.h>

#include <pthread.h>

#include <rtems/system.h>

#include <rtems/score/coremutex.h>

#include <rtems/score/watchdog.h>

#if defined(RTEMS_MULTIPROCESSING)

#include <rtems/score/mpci.h>

#endif

#include <rtems/posix/mutex.h>

#include <rtems/posix/priority.h>

#include <rtems/posix/time.h>

/*PAGE

 *

 *  _POSIX_Mutex_Lock_support

 *

 *  A support routine which implements guts of the blocking, non-blocking, and

 *  timed wait version of mutex lock.

 */

int _POSIX_Mutex_Lock_support(

  pthread_mutex_t           *mutex,

  boolean                    blocking,

  Watchdog_Interval          timeout

)

{

  register POSIX_Mutex_Control *the_mutex;

  Objects_Locations             location;

  the_mutex = _POSIX_Mutex_Get( mutex, &location );

  switch ( location ) {

    case OBJECTS_REMOTE:

#if defined(RTEMS_MULTIPROCESSING)

      return _POSIX_Mutex_MP_Send_request_packet(

          POSIX_MUTEX_MP_OBTAIN_REQUEST,

          *mutex,

          0,   /* must define the option set */

          WATCHDOG_NO_TIMEOUT

      );

#endif

    case OBJECTS_ERROR:

      return EINVAL;

    case OBJECTS_LOCAL:

      _CORE_mutex_Seize(

        &the_mutex->Mutex,

        the_mutex->Object.id,

        blocking,

        timeout

      );

      _Thread_Enable_dispatch();

      return _POSIX_Mutex_From_core_mutex_status(

        (CORE_mutex_Status) _Thread_Executing->Wait.return_code

      );

  }

  return POSIX_BOTTOM_REACHED();

}