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/**
* @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>
Status_Control _POSIX_Mutex_Seize_slow(
POSIX_Mutex_Control *the_mutex,
const Thread_queue_Operations *operations,
Thread_Control *executing,
bool wait,
Thread_queue_Context *queue_context
)
{
if ( wait ) {
_Thread_queue_Context_set_thread_state(
queue_context,
STATES_WAITING_FOR_MUTEX
);
_Thread_queue_Context_set_do_nothing_enqueue_callout( queue_context );
_Thread_queue_Context_set_deadlock_callout(
queue_context,
_Thread_queue_Deadlock_status
);
_Thread_queue_Enqueue(
&the_mutex->Recursive.Mutex.Queue.Queue,
operations,
executing,
queue_context
);
return _Thread_Wait_get_status( executing );
} else {
_POSIX_Mutex_Release( the_mutex, queue_context );
return STATUS_UNAVAILABLE;
}
}
int _POSIX_Mutex_Lock_support(
pthread_mutex_t *mutex,
bool wait,
Watchdog_Interval timeout
)
{
POSIX_Mutex_Control *the_mutex;
unsigned long flags;
Thread_queue_Context queue_context;
Thread_Control *executing;
Status_Control status;
the_mutex = _POSIX_Mutex_Get( mutex );
POSIX_MUTEX_VALIDATE_OBJECT( the_mutex, flags );
executing = _POSIX_Mutex_Acquire( the_mutex, &queue_context );
_Thread_queue_Context_set_relative_timeout( &queue_context, timeout );
switch ( _POSIX_Mutex_Get_protocol( flags ) ) {
case POSIX_MUTEX_PRIORITY_CEILING:
status = _POSIX_Mutex_Ceiling_seize(
the_mutex,
flags,
executing,
wait,
&queue_context
);
break;
case POSIX_MUTEX_NO_PROTOCOL:
status = _POSIX_Mutex_Seize(
the_mutex,
flags,
POSIX_MUTEX_NO_PROTOCOL_TQ_OPERATIONS,
executing,
wait,
&queue_context
);
break;
default:
_Assert(
_POSIX_Mutex_Get_protocol( flags ) == POSIX_MUTEX_PRIORITY_INHERIT
);
status = _POSIX_Mutex_Seize(
the_mutex,
flags,
POSIX_MUTEX_PRIORITY_INHERIT_TQ_OPERATIONS,
executing,
wait,
&queue_context
);
break;
}
return _POSIX_Get_error( status );
}
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