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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [src/] [threadqfirst.c] - Rev 619
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/* * Thread Queue Handler * * * COPYRIGHT (c) 1989-1999. * 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.OARcorp.com/rtems/license.html. * * $Id: threadqfirst.c,v 1.2 2001-09-27 11:59:34 chris Exp $ */ #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_First * * This routines returns a pointer to the first thread on the * specified threadq. * * Input parameters: * the_thread_queue - pointer to thread queue * * Output parameters: * returns - first thread or NULL */ Thread_Control *_Thread_queue_First( Thread_queue_Control *the_thread_queue ) { Thread_Control *the_thread; switch ( the_thread_queue->discipline ) { case THREAD_QUEUE_DISCIPLINE_FIFO: the_thread = _Thread_queue_First_fifo( the_thread_queue ); break; case THREAD_QUEUE_DISCIPLINE_PRIORITY: the_thread = _Thread_queue_First_priority( the_thread_queue ); break; default: /* this is only to prevent warnings */ the_thread = NULL; break; } return the_thread; }
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