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/*
* Mutex Handler
*
* DESCRIPTION:
*
* This package is the implementation of the Mutex Handler.
* This handler provides synchronization and mutual exclusion capabilities.
*
* 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.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/coremutex.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#if defined(__RTEMS_DO_NOT_INLINE_CORE_MUTEX_SEIZE__)
void _CORE_mutex_Seize(
CORE_mutex_Control *_the_mutex,
Objects_Id _id,
bool _wait,
Watchdog_Interval _timeout,
ISR_Level _level
)
{
_CORE_mutex_Seize_body( _the_mutex, _id, _wait, _timeout, _level );
}
#endif
/*PAGE
*
* _CORE_mutex_Seize (interrupt blocking support)
*
* This routine blocks the caller thread after an attempt attempts to obtain
* the specified mutex has failed.
*
* Input parameters:
* the_mutex - pointer to mutex control block
* timeout - number of ticks to wait (0 means forever)
*/
void _CORE_mutex_Seize_interrupt_blocking(
CORE_mutex_Control *the_mutex,
Watchdog_Interval timeout
)
{
Thread_Control *executing;
executing = _Thread_Executing;
if ( _CORE_mutex_Is_inherit_priority( &the_mutex->Attributes ) ) {
if ( the_mutex->holder->Priority_node.current_priority > executing->Priority_node.current_priority ) {
_Thread_Change_priority(
the_mutex->holder,
executing->Priority_node.current_priority,
false
);
}
}
the_mutex->blocked_count++;
_Thread_queue_Enqueue( &the_mutex->Wait_queue, timeout );
_Thread_Enable_dispatch();
}
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