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/*
* Cancel Thread Blocking Operation
*
*
* 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.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/thread.h>
#if defined(RTEMS_DEBUG)
#include <rtems/score/interr.h>
#endif
void _Thread_blocking_operation_Cancel(
#if defined(RTEMS_DEBUG)
Thread_blocking_operation_States sync_state,
#else
Thread_blocking_operation_States sync_state __attribute__((unused)),
#endif
Thread_Control *the_thread,
ISR_Level level
)
{
/*
* Cases that should not happen and why.
*
* THREAD_BLOCKING_OPERATION_SYNCHRONIZED:
*
* This indicates that someone did not enter a blocking
* operation critical section.
*
* THREAD_BLOCKING_OPERATION_NOTHING_HAPPENED:
*
* This indicates that there was nothing to cancel so
* we should not have been called.
*/
#if defined(RTEMS_DEBUG)
if ( (sync_state == THREAD_BLOCKING_OPERATION_SYNCHRONIZED) ||
(sync_state == THREAD_BLOCKING_OPERATION_NOTHING_HAPPENED) ) {
_Internal_error_Occurred(
INTERNAL_ERROR_CORE,
true,
INTERNAL_ERROR_IMPLEMENTATION_BLOCKING_OPERATION_CANCEL
);
}
#endif
/*
* The thread is not waiting on anything after this completes.
*/
the_thread->Wait.queue = NULL;
/*
* If the sync state is timed out, this is very likely not needed.
* But better safe than sorry when it comes to critical sections.
*/
if ( _Watchdog_Is_active( &the_thread->Timer ) ) {
_Watchdog_Deactivate( &the_thread->Timer );
_ISR_Enable( level );
(void) _Watchdog_Remove( &the_thread->Timer );
} else
_ISR_Enable( level );
/*
* Global objects with thread queue's should not be operated on from an
* ISR. But the sync code still must allow short timeouts to be processed
* correctly.
*/
_Thread_Unblock( the_thread );
#if defined(RTEMS_MULTIPROCESSING)
if ( !_Objects_Is_local_id( the_thread->Object.id ) )
_Thread_MP_Free_proxy( the_thread );
#endif
}
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