/*
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/*
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* Thread Queue Handler
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* Thread Queue Handler
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*
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*
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*
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*
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* COPYRIGHT (c) 1989-1999.
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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* On-Line Applications Research Corporation (OAR).
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*
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*
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* The license and distribution terms for this file may be
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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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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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* http://www.OARcorp.com/rtems/license.html.
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*
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*
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* threadqenqueuefifo.c,v 1.2 1999/11/17 17:50:40 joel Exp
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* threadqenqueuefifo.c,v 1.2 1999/11/17 17:50:40 joel Exp
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*/
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*/
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#include <rtems/system.h>
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#include <rtems/system.h>
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#include <rtems/score/chain.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/isr.h>
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#include <rtems/score/object.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/states.h>
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#include <rtems/score/thread.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/threadq.h>
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#include <rtems/score/tqdata.h>
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#include <rtems/score/tqdata.h>
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/*PAGE
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/*PAGE
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*
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*
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* _Thread_queue_Enqueue_fifo
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* _Thread_queue_Enqueue_fifo
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*
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*
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* This routine blocks a thread, places it on a thread, and optionally
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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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* starts a timeout timer.
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*
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*
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* Input parameters:
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* Input parameters:
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* the_thread_queue - pointer to threadq
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* the_thread_queue - pointer to threadq
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* the_thread - pointer to the thread to block
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* the_thread - pointer to the thread to block
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* timeout - interval to wait
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* timeout - interval to wait
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*
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*
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* Output parameters: NONE
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* Output parameters: NONE
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*
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*
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* INTERRUPT LATENCY:
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* INTERRUPT LATENCY:
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* only case
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* only case
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*/
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*/
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void _Thread_queue_Enqueue_fifo (
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void _Thread_queue_Enqueue_fifo (
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Thread_queue_Control *the_thread_queue,
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Thread_queue_Control *the_thread_queue,
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Thread_Control *the_thread,
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Thread_Control *the_thread,
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Watchdog_Interval timeout
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Watchdog_Interval timeout
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)
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)
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{
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{
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ISR_Level level;
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ISR_Level level;
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Thread_queue_States sync_state;
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Thread_queue_States sync_state;
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_ISR_Disable( level );
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_ISR_Disable( level );
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sync_state = the_thread_queue->sync_state;
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sync_state = the_thread_queue->sync_state;
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the_thread_queue->sync_state = THREAD_QUEUE_SYNCHRONIZED;
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the_thread_queue->sync_state = THREAD_QUEUE_SYNCHRONIZED;
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switch ( sync_state ) {
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switch ( sync_state ) {
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case THREAD_QUEUE_SYNCHRONIZED:
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case THREAD_QUEUE_SYNCHRONIZED:
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/*
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/*
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* This should never happen. It indicates that someone did not
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* This should never happen. It indicates that someone did not
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* enter a thread queue critical section.
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* enter a thread queue critical section.
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*/
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*/
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break;
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break;
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case THREAD_QUEUE_NOTHING_HAPPENED:
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case THREAD_QUEUE_NOTHING_HAPPENED:
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_Chain_Append_unprotected(
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_Chain_Append_unprotected(
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&the_thread_queue->Queues.Fifo,
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&the_thread_queue->Queues.Fifo,
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&the_thread->Object.Node
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&the_thread->Object.Node
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);
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);
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_ISR_Enable( level );
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_ISR_Enable( level );
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return;
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return;
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case THREAD_QUEUE_TIMEOUT:
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case THREAD_QUEUE_TIMEOUT:
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the_thread->Wait.return_code = the_thread->Wait.queue->timeout_status;
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the_thread->Wait.return_code = the_thread->Wait.queue->timeout_status;
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_ISR_Enable( level );
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_ISR_Enable( level );
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break;
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break;
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case THREAD_QUEUE_SATISFIED:
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case THREAD_QUEUE_SATISFIED:
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if ( _Watchdog_Is_active( &the_thread->Timer ) ) {
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if ( _Watchdog_Is_active( &the_thread->Timer ) ) {
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_Watchdog_Deactivate( &the_thread->Timer );
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_Watchdog_Deactivate( &the_thread->Timer );
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_ISR_Enable( level );
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_ISR_Enable( level );
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(void) _Watchdog_Remove( &the_thread->Timer );
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(void) _Watchdog_Remove( &the_thread->Timer );
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} else
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} else
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_ISR_Enable( level );
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_ISR_Enable( level );
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break;
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break;
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}
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}
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/*
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/*
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* Global objects with thread queue's should not be operated on from an
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* Global objects with thread queue's should not be operated on from an
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* ISR. But the sync code still must allow short timeouts to be processed
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* ISR. But the sync code still must allow short timeouts to be processed
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* correctly.
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* correctly.
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*/
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*/
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_Thread_Unblock( the_thread );
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_Thread_Unblock( the_thread );
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#if defined(RTEMS_MULTIPROCESSING)
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#if defined(RTEMS_MULTIPROCESSING)
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if ( !_Objects_Is_local_id( the_thread->Object.id ) )
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if ( !_Objects_Is_local_id( the_thread->Object.id ) )
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_Thread_MP_Free_proxy( the_thread );
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_Thread_MP_Free_proxy( the_thread );
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#endif
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#endif
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}
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}
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