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/*
* Convert POSIX Mutex ID to local object pointer
*
* 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.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include <pthread.h>
#include <rtems/system.h>
#include <rtems/score/coremutex.h>
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/score/mpci.h>
#endif
#include <rtems/posix/mutex.h>
/*
* _POSIX_Mutex_Get_support
*
* NOTE: The support macro makes it possible for both to use exactly
* the same code to check for NULL id pointer and
* PTHREAD_MUTEX_INITIALIZER without adding overhead.
*/
#define ___POSIX_Mutex_Get_support( _id, _location ) \
do { \
int _status; \
\
if ( !_id ) { \
*_location = OBJECTS_ERROR; \
return (POSIX_Mutex_Control *) 0; \
} \
\
if ( *_id == PTHREAD_MUTEX_INITIALIZER ) { \
/* \
* Do an "auto-create" here. \
*/ \
\
_status = pthread_mutex_init( (pthread_mutex_t *)_id, 0 ); \
if ( _status ) { \
*_location = OBJECTS_ERROR; \
return (POSIX_Mutex_Control *) 0; \
} \
} \
} while (0)
POSIX_Mutex_Control *_POSIX_Mutex_Get (
pthread_mutex_t *mutex,
Objects_Locations *location
)
{
Objects_Id *id = (Objects_Id *)mutex;
___POSIX_Mutex_Get_support( id, location );
return (POSIX_Mutex_Control *)
_Objects_Get( &_POSIX_Mutex_Information, *id, location );
}
POSIX_Mutex_Control *_POSIX_Mutex_Get_interrupt_disable (
pthread_mutex_t *mutex,
Objects_Locations *location,
ISR_Level *level
)
{
Objects_Id *id = (Objects_Id *)mutex;
___POSIX_Mutex_Get_support( id, location );
return (POSIX_Mutex_Control *)
_Objects_Get_isr_disable( &_POSIX_Mutex_Information, *id, location, level );
}
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