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/*

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

 */

#include <rtems/system.h>

#include <rtems/rtems/status.h>

#include <rtems/rtems/asr.h>

#include <rtems/score/isr.h>

#include <rtems/rtems/modes.h>

#include <rtems/rtems/signal.h>

#include <rtems/score/thread.h>

#include <rtems/rtems/tasks.h>

/*PAGE

 *

 *  rtems_signal_catch

 *

 *  This directive allows a thread to specify what action to take when

 *  catching signals.

 *

 *  Input parameters:

 *    handler  - address of asynchronous signal routine (asr)

 *              ( NULL indicates asr is invalid )

 *    mode_set - mode value for asr

 *

 *  Output parameters:

 *    RTEMS_SUCCESSFUL - always succeeds

 */

rtems_status_code rtems_signal_catch(

  rtems_asr_entry   asr_handler,

  rtems_mode        mode_set

)

{

  Thread_Control     *executing;

  RTEMS_API_Control  *api;

  ASR_Information    *asr;

/* XXX normalize mode */

  executing = _Thread_Executing;

  api = executing->API_Extensions[ THREAD_API_RTEMS ];

  asr = &api->Signal;

  _Thread_Disable_dispatch(); /* cannot reschedule while */

                              /*   the thread is inconsistent */

  if ( !_ASR_Is_null_handler( asr_handler ) ) {

    asr->mode_set = mode_set;

    asr->handler = asr_handler;

  }

  else

    _ASR_Initialize( asr );

  _Thread_Enable_dispatch();

  return RTEMS_SUCCESSFUL;

}