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/*

 *  Event Manager

 *

 *  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: eventreceive.c,v 1.2 2001-09-27 11:59:19 chris Exp $

 */

#include <rtems/system.h>

#include <rtems/rtems/status.h>

#include <rtems/rtems/event.h>

#include <rtems/score/isr.h>

#include <rtems/score/object.h>

#include <rtems/rtems/options.h>

#include <rtems/score/states.h>

#include <rtems/score/thread.h>

#include <rtems/rtems/tasks.h>

/*PAGE

 *

 *  rtems_event_receive

 *

 *  This directive allows a thread to receive a set of events.

 *

 *  Input parameters:

 *    event_in   - input event condition

 *    option_set - options

 *    ticks      - number of ticks to wait (0 means wait forever)

 *    event_out  - pointer to output event set

 *

 *  Output parameters:

 *    event out         - event set

 *    RTEMS_SUCCESSFUL - if successful

 *    error code        - if unsuccessful

 */

rtems_status_code rtems_event_receive(

  rtems_event_set  event_in,

  rtems_option     option_set,

  rtems_interval   ticks,

  rtems_event_set *event_out

)

{

  RTEMS_API_Control       *api;

  api = _Thread_Executing->API_Extensions[ THREAD_API_RTEMS ];

  if ( _Event_sets_Is_empty( event_in ) ) {

    *event_out = api->pending_events;

    return RTEMS_SUCCESSFUL;

  }

  _Thread_Disable_dispatch();

  _Event_Seize( event_in, option_set, ticks, event_out );

  _Thread_Enable_dispatch();

  return( _Thread_Executing->Wait.return_code );

}