forked from Imagelibrary/rtems
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
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* Thread Queue Handler
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*
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*
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* COPYRIGHT (c) 1989-2008.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/system.h>
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#include <rtems/score/chain.h>
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#include <rtems/score/isr.h>
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#include <rtems/score/object.h>
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#include <rtems/score/states.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/threadq.h>
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#include <rtems/score/tqdata.h>
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/*PAGE
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*
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* _Thread_queue_Enqueue_with_handler
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*
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* This routine blocks a thread, places it on a thread, and optionally
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* starts a timeout timer.
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*
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* Input parameters:
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* the_thread_queue - pointer to threadq
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* timeout - interval to wait
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*
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* Output parameters: NONE
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*
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* INTERRUPT LATENCY:
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* only case
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*/
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void _Thread_queue_Enqueue_with_handler(
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Thread_queue_Control *the_thread_queue,
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Watchdog_Interval timeout,
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Thread_queue_Timeout_callout handler
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)
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{
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Thread_Control *the_thread;
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ISR_Level level;
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Thread_blocking_operation_States sync_state;
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Thread_blocking_operation_States (*enqueue_p)(
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Thread_queue_Control *,
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Thread_Control *,
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ISR_Level *
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);
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the_thread = _Thread_Executing;
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#if defined(RTEMS_MULTIPROCESSING)
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if ( _Thread_MP_Is_receive( the_thread ) && the_thread->receive_packet )
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the_thread = _Thread_MP_Allocate_proxy( the_thread_queue->state );
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else
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#endif
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/*
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* Set the blocking state for this thread queue in the thread.
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*/
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_Thread_Set_state( the_thread, the_thread_queue->state );
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/*
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* If the thread wants to timeout, then schedule its timer.
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*/
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if ( timeout ) {
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_Watchdog_Initialize(
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&the_thread->Timer,
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handler,
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the_thread->Object.id,
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NULL
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);
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_Watchdog_Insert_ticks( &the_thread->Timer, timeout );
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}
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/*
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* Now enqueue the thread per the discipline for this thread queue.
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*/
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if ( the_thread_queue->discipline == THREAD_QUEUE_DISCIPLINE_PRIORITY )
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enqueue_p = _Thread_queue_Enqueue_priority;
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else /* must be THREAD_QUEUE_DISCIPLINE_FIFO */
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enqueue_p = _Thread_queue_Enqueue_fifo;
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sync_state = (*enqueue_p)( the_thread_queue, the_thread, &level );
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if ( sync_state != THREAD_BLOCKING_OPERATION_NOTHING_HAPPENED )
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_Thread_blocking_operation_Cancel( sync_state, the_thread, level );
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}
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