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/*
* Thread Queue Handler
*
*
* 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.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/chain.h>
#include <rtems/score/isr.h>
#include <rtems/score/object.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#include <rtems/score/tqdata.h>
/*PAGE
*
* _Thread_queue_Enqueue_with_handler
*
* This routine blocks a thread, places it on a thread, and optionally
* starts a timeout timer.
*
* Input parameters:
* the_thread_queue - pointer to threadq
* timeout - interval to wait
*
* Output parameters: NONE
*
* INTERRUPT LATENCY:
* only case
*/
void _Thread_queue_Enqueue_with_handler(
Thread_queue_Control *the_thread_queue,
Watchdog_Interval timeout,
Thread_queue_Timeout_callout handler
)
{
Thread_Control *the_thread;
ISR_Level level;
Thread_blocking_operation_States sync_state;
Thread_blocking_operation_States (*enqueue_p)(
Thread_queue_Control *,
Thread_Control *,
ISR_Level *
);
the_thread = _Thread_Executing;
#if defined(RTEMS_MULTIPROCESSING)
if ( _Thread_MP_Is_receive( the_thread ) && the_thread->receive_packet )
the_thread = _Thread_MP_Allocate_proxy( the_thread_queue->state );
else
#endif
/*
* Set the blocking state for this thread queue in the thread.
*/
_Thread_Set_state( the_thread, the_thread_queue->state );
/*
* If the thread wants to timeout, then schedule its timer.
*/
if ( timeout ) {
_Watchdog_Initialize(
&the_thread->Timer,
handler,
the_thread->Object.id,
NULL
);
_Watchdog_Insert_ticks( &the_thread->Timer, timeout );
}
/*
* Now enqueue the thread per the discipline for this thread queue.
*/
if ( the_thread_queue->discipline == THREAD_QUEUE_DISCIPLINE_PRIORITY )
enqueue_p = _Thread_queue_Enqueue_priority;
else /* must be THREAD_QUEUE_DISCIPLINE_FIFO */
enqueue_p = _Thread_queue_Enqueue_fifo;
sync_state = (*enqueue_p)( the_thread_queue, the_thread, &level );
if ( sync_state != THREAD_BLOCKING_OPERATION_NOTHING_HAPPENED )
_Thread_blocking_operation_Cancel( sync_state, the_thread, level );
}
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