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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [taskstart.c] - Blame information for rev 410

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1 30 unneback
/*
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 *  RTEMS Task Manager
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 *
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 *
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 *  COPYRIGHT (c) 1989-1999.
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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.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: taskstart.c,v 1.2 2001-09-27 11:59:19 chris Exp $
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 */
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#include <rtems/system.h>
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/support.h>
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#include <rtems/rtems/modes.h>
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#include <rtems/score/object.h>
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#include <rtems/score/stack.h>
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#include <rtems/score/states.h>
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#include <rtems/rtems/tasks.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/tod.h>
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#include <rtems/score/userext.h>
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#include <rtems/score/wkspace.h>
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#include <rtems/score/apiext.h>
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#include <rtems/score/sysstate.h>
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/*PAGE
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 *
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 *  rtems_task_start
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 *
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 *  This directive readies the thread identified by the "id"
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 *  based on its current priorty, to await execution.  A thread
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 *  can be started only from the dormant state.
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 *
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 *  Input parameters:
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 *    id          - thread id
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 *    entry_point - start execution address of thread
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 *    argument    - thread argument
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 *
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 *  Output parameters:
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 *    RTEMS_SUCCESSFUL - if successful
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 *    error code        - if unsuccessful
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 */
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rtems_status_code rtems_task_start(
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  rtems_id         id,
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  rtems_task_entry entry_point,
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  unsigned32       argument
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)
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{
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  register Thread_Control *the_thread;
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  Objects_Locations        location;
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  if ( entry_point == NULL )
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    return RTEMS_INVALID_ADDRESS;
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  the_thread = _Thread_Get( id, &location );
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  switch ( location ) {
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    case OBJECTS_REMOTE:
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#if defined(RTEMS_MULTIPROCESSING)
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      _Thread_Dispatch();
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      return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
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#endif
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    case OBJECTS_ERROR:
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      return RTEMS_INVALID_ID;
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    case OBJECTS_LOCAL:
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      if ( _Thread_Start(
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             the_thread, THREAD_START_NUMERIC, entry_point, NULL, argument ) ) {
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        _Thread_Enable_dispatch();
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        return RTEMS_SUCCESSFUL;
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      }
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      _Thread_Enable_dispatch();
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      return RTEMS_INCORRECT_STATE;
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  }
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  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
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}

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