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/**
* @file
*
* @brief Convert POSIX Mutex ID to local object pointer
* @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.com/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/posix/muteximpl.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_error_check( _id, _location ) \
do { \
if ( !_id ) { \
*_location = OBJECTS_ERROR; \
return (POSIX_Mutex_Control *) 0; \
} \
} while (0)
#define ___POSIX_Mutex_Get_support_auto_initialization( _id, _location ) \
do { \
int _status; \
\
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
)
{
___POSIX_Mutex_Get_support_error_check( mutex, location );
___POSIX_Mutex_Get_support_auto_initialization( mutex, location );
return (POSIX_Mutex_Control *)
_Objects_Get( &_POSIX_Mutex_Information, (Objects_Id) *mutex, location );
}
POSIX_Mutex_Control *_POSIX_Mutex_Get_interrupt_disable (
pthread_mutex_t *mutex,
Objects_Locations *location,
ISR_Level *level
)
{
___POSIX_Mutex_Get_support_error_check( mutex, location );
___POSIX_Mutex_Get_support_auto_initialization( mutex, location );
return (POSIX_Mutex_Control *) _Objects_Get_isr_disable(
&_POSIX_Mutex_Information,
(Objects_Id) *mutex,
location,
level
);
}
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