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/**
* @file
*
* @brief Seize Mutex with Blocking
* @ingroup ScoreMutex
*/
/*
* COPYRIGHT (c) 1989-2006.
* 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/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/coremuteximpl.h>
#include <rtems/score/statesimpl.h>
#include <rtems/score/thread.h>
#if defined(__RTEMS_DO_NOT_INLINE_CORE_MUTEX_SEIZE__)
void _CORE_mutex_Seize(
CORE_mutex_Control *_the_mutex,
Thread_Control *_executing,
Objects_Id _id,
bool _wait,
Watchdog_Interval _timeout,
ISR_Level _level
)
{
_CORE_mutex_Seize_body(
_the_mutex,
_executing,
_id,
_wait,
_timeout,
_level
);
}
#endif
void _CORE_mutex_Seize_interrupt_blocking(
CORE_mutex_Control *the_mutex,
Thread_Control *executing,
Watchdog_Interval timeout,
ISR_lock_Context *lock_context
)
{
#if !defined(RTEMS_SMP)
/*
* We must disable thread dispatching here since we enable the interrupts for
* priority inheritance mutexes.
*/
_Thread_Dispatch_disable();
#endif
if ( _CORE_mutex_Is_inherit_priority( &the_mutex->Attributes ) ) {
Thread_Control *holder = the_mutex->holder;
#if !defined(RTEMS_SMP)
/*
* To enable interrupts here works only since exactly one executing thread
* exists and only threads are allowed to seize and surrender mutexes with
* the priority inheritance protocol. On SMP configurations more than one
* executing thread may exist, so here we must not release the lock, since
* otherwise the current holder may be no longer the holder of the mutex
* once we released the lock.
*/
_Thread_queue_Release( &the_mutex->Wait_queue, lock_context );
#endif
_Thread_Raise_priority( holder, executing->current_priority );
#if !defined(RTEMS_SMP)
_Thread_queue_Acquire( &the_mutex->Wait_queue, lock_context );
#endif
}
_Thread_queue_Enqueue_critical(
&the_mutex->Wait_queue,
executing,
STATES_WAITING_FOR_MUTEX,
timeout,
CORE_MUTEX_TIMEOUT,
lock_context
);
#if !defined(RTEMS_SMP)
_Thread_Dispatch_enable( _Per_CPU_Get() );
#endif
}
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