/*
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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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* threadqfirstfifo.c,v 1.2 1999/11/17 17:50:40 joel Exp
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* threadqfirstfifo.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_First_fifo
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* _Thread_queue_First_fifo
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*
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*
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* This routines returns a pointer to the first thread on the
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* This routines returns a pointer to the first thread on the
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* specified threadq.
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* specified threadq.
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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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*
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*
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* Output parameters:
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* Output parameters:
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* returns - first thread or NULL
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* returns - first thread or NULL
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*/
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*/
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Thread_Control *_Thread_queue_First_fifo(
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Thread_Control *_Thread_queue_First_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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)
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)
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{
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{
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if ( !_Chain_Is_empty( &the_thread_queue->Queues.Fifo ) )
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if ( !_Chain_Is_empty( &the_thread_queue->Queues.Fifo ) )
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return (Thread_Control *) the_thread_queue->Queues.Fifo.first;
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return (Thread_Control *) the_thread_queue->Queues.Fifo.first;
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return NULL;
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return NULL;
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}
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}
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