path: root/cpukit/posix/src/mutexgetprioceiling.c

/**
 * @file
 *
 * @brief Returns the Current Priority Ceiling of the Mutex
 * @ingroup POSIXAPI
 */

/*
 *  COPYRIGHT (c) 1989-2007.
 *  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.org/license/LICENSE.
 */

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

#include <errno.h>
#include <pthread.h>

#include <rtems/system.h>
#include <rtems/score/coremuteximpl.h>
#include <rtems/score/watchdog.h>
#include <rtems/posix/muteximpl.h>
#include <rtems/posix/priorityimpl.h>

/*
 *  13.6.2 Change the Priority Ceiling of a Mutex, P1003.1c/Draft 10, p. 131
 */

int pthread_mutex_getprioceiling(
  pthread_mutex_t   *mutex,
  int               *prioceiling
)
{
  register POSIX_Mutex_Control *the_mutex;
  Objects_Locations             location;

  if ( !prioceiling )
    return EINVAL;

  the_mutex = _POSIX_Mutex_Get( mutex, &location );
  switch ( location ) {

    case OBJECTS_LOCAL:
      *prioceiling = _POSIX_Priority_From_core(
        the_mutex->Mutex.Attributes.priority_ceiling
      );
      _Objects_Put( &the_mutex->Object );
      return 0;

#if defined(RTEMS_MULTIPROCESSING)
    case OBJECTS_REMOTE:
#endif
    case OBJECTS_ERROR:
      break;
  }

  return EINVAL;
}