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/**
* @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 <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
)
{
POSIX_Mutex_Control *the_mutex;
Thread_queue_Context queue_context;
if ( prioceiling == NULL ) {
return EINVAL;
}
the_mutex = _POSIX_Mutex_Get( mutex, &queue_context );
if ( the_mutex == NULL ) {
return EINVAL;
}
_POSIX_Mutex_Acquire_critical( the_mutex, &queue_context );
if ( the_mutex->protocol == POSIX_MUTEX_PRIORITY_CEILING ) {
*prioceiling = _POSIX_Priority_From_core(
_CORE_ceiling_mutex_Get_scheduler( &the_mutex->Mutex ),
_CORE_ceiling_mutex_Get_priority( &the_mutex->Mutex )
);
} else {
*prioceiling = 0;
}
_POSIX_Mutex_Release( the_mutex, &queue_context );
return 0;
}
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