/**
* @file
*
* @brief Support Call to function Enables Locking of Mutex Object
* @ingroup POSIXAPI
*/
/*
* COPYRIGHT (c) 1989-2014.
* 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/posixapi.h>
THREAD_QUEUE_OBJECT_ASSERT(
POSIX_Mutex_Control,
Mutex.Recursive.Mutex.Wait_queue
);
static Status_Control _POSIX_Mutex_Lock_nested(
CORE_recursive_mutex_Control *the_recursive_mutex
)
{
POSIX_Mutex_Control *the_mutex;
the_mutex = RTEMS_CONTAINER_OF(
the_recursive_mutex,
POSIX_Mutex_Control,
Mutex.Recursive
);
if ( the_mutex->is_recursive ) {
return _CORE_recursive_mutex_Seize_nested( the_recursive_mutex );
} else {
return STATUS_NESTING_NOT_ALLOWED;
}
}
int _POSIX_Mutex_Lock_support(
pthread_mutex_t *mutex,
bool wait,
Watchdog_Interval timeout
)
{
POSIX_Mutex_Control *the_mutex;
Thread_queue_Context queue_context;
Thread_Control *executing;
Status_Control status;
the_mutex = _POSIX_Mutex_Get( mutex, &queue_context );
if ( the_mutex == NULL ) {
return EINVAL;
}
executing = _Thread_Executing;
_Thread_queue_Context_set_relative_timeout( &queue_context, timeout );
switch ( the_mutex->protocol ) {
case POSIX_MUTEX_PRIORITY_CEILING:
status = _CORE_ceiling_mutex_Seize(
&the_mutex->Mutex,
executing,
wait,
_POSIX_Mutex_Lock_nested,
&queue_context
);
break;
case POSIX_MUTEX_NO_PROTOCOL:
status = _CORE_recursive_mutex_Seize(
&the_mutex->Mutex.Recursive,
POSIX_MUTEX_NO_PROTOCOL_TQ_OPERATIONS,
executing,
wait,
_POSIX_Mutex_Lock_nested,
&queue_context
);
break;
default:
_Assert( the_mutex->protocol == POSIX_MUTEX_PRIORITY_INHERIT );
status = _CORE_recursive_mutex_Seize(
&the_mutex->Mutex.Recursive,
CORE_MUTEX_TQ_PRIORITY_INHERIT_OPERATIONS,
executing,
wait,
_POSIX_Mutex_Lock_nested,
&queue_context
);
break;
}
return _POSIX_Get_error( status );
}