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/**
* @file
*
* @brief Timeout Event
* @ingroup ClassicEvent
*/
/*
* COPYRIGHT (c) 1989-2008.
* 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/rtems/eventimpl.h>
#include <rtems/score/threadimpl.h>
void _Event_Timeout(
Objects_Id id,
void *arg
)
{
Thread_Control *the_thread;
Objects_Locations location;
ISR_lock_Context lock_context;
Thread_Wait_flags wait_flags;
Thread_Wait_flags wait_class;
Thread_Wait_flags intend_to_block;
Thread_Wait_flags blocked;
bool success;
bool unblock;
the_thread = _Thread_Acquire( id, &location, &lock_context );
switch ( location ) {
case OBJECTS_LOCAL:
wait_flags = _Thread_Wait_flags_get( the_thread );
wait_class = wait_flags & THREAD_WAIT_CLASS_MASK;
intend_to_block = wait_class | THREAD_WAIT_STATE_INTEND_TO_BLOCK;
blocked = wait_class | THREAD_WAIT_STATE_BLOCKED;
success = _Thread_Wait_flags_try_change_critical(
the_thread,
intend_to_block,
wait_class | THREAD_WAIT_STATE_INTERRUPT_TIMEOUT
);
if ( success ) {
the_thread->Wait.return_code = RTEMS_TIMEOUT;
unblock = false;
} else if ( _Thread_Wait_flags_get( the_thread ) == blocked ) {
the_thread->Wait.return_code = RTEMS_TIMEOUT;
_Thread_Wait_flags_set(
the_thread,
wait_class | THREAD_WAIT_STATE_TIMEOUT
);
unblock = true;
} else {
unblock = false;
}
if ( unblock ) {
Per_CPU_Control *cpu_self;
cpu_self = _Objects_Release_and_thread_dispatch_disable(
&the_thread->Object,
&lock_context
);
_Giant_Acquire( cpu_self );
_Thread_Unblock( the_thread );
_Giant_Release( cpu_self );
_Thread_Dispatch_enable( cpu_self );
} else {
_Objects_Release_and_ISR_enable( &the_thread->Object, &lock_context );
}
break;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE: /* impossible */
#endif
case OBJECTS_ERROR:
break;
}
}
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