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/**
* @file
*
* @brief Thread Wait Timeout
*
* @ingroup ScoreThread
*/
/*
* 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/score/threadimpl.h>
static void _Thread_Do_timeout( Thread_Control *the_thread )
{
the_thread->Wait.return_code = the_thread->Wait.timeout_code;
_Thread_Lock_restore_default( the_thread );
}
void _Thread_Timeout( Objects_Id id, void *arg )
{
Thread_Control *the_thread;
ISR_lock_Control *thread_lock;
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 = arg;
thread_lock = _Thread_Lock_acquire( the_thread, &lock_context );
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_READY_AGAIN
);
if ( success ) {
_Thread_Do_timeout( the_thread );
unblock = false;
} else if ( _Thread_Wait_flags_get( the_thread ) == blocked ) {
_Thread_Wait_flags_set(
the_thread,
wait_class | THREAD_WAIT_STATE_READY_AGAIN
);
_Thread_Do_timeout( the_thread );
unblock = true;
} else {
unblock = false;
}
_Thread_Lock_release( thread_lock, &lock_context );
if ( unblock ) {
_Thread_Unblock( the_thread );
}
}
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