signalmp.c

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

/*
 *  Multiprocessing Support for the 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.rtems.com/license/LICENSE.
 *
 *  $Id: signalmp.c,v 1.9.6.1 2003/09/04 18:47:18 joel Exp $
 */

#include <rtems/system.h>
#include <rtems/rtems/status.h>
#include <rtems/score/mpci.h>
#include <rtems/score/mppkt.h>
#include <rtems/score/object.h>
#include <rtems/rtems/options.h>
#include <rtems/rtems/signal.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/watchdog.h>
#include <rtems/rtems/support.h>

/*PAGE
 *
 *  _Signal_MP_Send_process_packet
 *
 *  This subprogram is not needed since there are no process
 *  packets to be sent by this manager.
 *
 */

/*PAGE
 *
 *  _Signal_MP_Send_request_packet
 *
 */

rtems_status_code _Signal_MP_Send_request_packet (
  Signal_MP_Remote_operations operation,
  Objects_Id                  task_id,
  rtems_signal_set      signal_in
)
{
  Signal_MP_Packet *the_packet;

  switch ( operation ) {

    case SIGNAL_MP_SEND_REQUEST:

      the_packet                    = _Signal_MP_Get_packet();
      the_packet->Prefix.the_class  = MP_PACKET_SIGNAL;
      the_packet->Prefix.length     = sizeof ( Signal_MP_Packet );
      the_packet->Prefix.to_convert = sizeof ( Signal_MP_Packet );
      the_packet->operation         = operation;
      the_packet->Prefix.id         = task_id;
      the_packet->signal_in         = signal_in;

      return _MPCI_Send_request_packet(
        rtems_get_node( task_id ),
        &the_packet->Prefix,
        STATES_READY   /* Not used */
      );
      break;

    case SIGNAL_MP_SEND_RESPONSE:
      break;

  }
  /*
   *  The following line is included to satisfy compilers which
   *  produce warnings when a function does not end with a return.
   */
  return RTEMS_INTERNAL_ERROR;
}

/*PAGE
 *
 *  _Signal_MP_Send_response_packet
 *
 */

void _Signal_MP_Send_response_packet (
  Signal_MP_Remote_operations  operation,
  Thread_Control              *the_thread
)
{
  Signal_MP_Packet *the_packet;

  switch ( operation ) {

    case SIGNAL_MP_SEND_RESPONSE:

      the_packet = ( Signal_MP_Packet *) the_thread->receive_packet;

/*
 *  The packet being returned already contains the class, length, and
 *  to_convert fields, therefore they are not set in this routine.
 */
      the_packet->operation = operation;
      the_packet->Prefix.id = the_packet->Prefix.source_tid;

      _MPCI_Send_response_packet(
        rtems_get_node( the_packet->Prefix.source_tid ),
        &the_packet->Prefix
      );
      break;

    case SIGNAL_MP_SEND_REQUEST:
      break;

  }
}

/*PAGE
 *
 *
 *  _Signal_MP_Process_packet
 *
 */

void _Signal_MP_Process_packet (
  rtems_packet_prefix  *the_packet_prefix
)
{
  Signal_MP_Packet *the_packet;
  Thread_Control   *the_thread;

  the_packet = (Signal_MP_Packet *) the_packet_prefix;

  switch ( the_packet->operation ) {

    case SIGNAL_MP_SEND_REQUEST:

      the_packet->Prefix.return_code = rtems_signal_send(
        the_packet->Prefix.id,
        the_packet->signal_in
      );

      _Signal_MP_Send_response_packet(
        SIGNAL_MP_SEND_RESPONSE,
        _Thread_Executing
      );
      break;

    case SIGNAL_MP_SEND_RESPONSE:

      the_thread = _MPCI_Process_response( the_packet_prefix );

      _MPCI_Return_packet( the_packet_prefix );
      break;

  }
}

/*PAGE
 *
 *  _Signal_MP_Send_object_was_deleted
 *
 *  This subprogram is not needed since there are no objects
 *  deleted by this manager.
 *
 */

/*PAGE
 *
 *  _Signal_MP_Send_extract_proxy
 *
 *  This subprogram is not needed since there are no objects
 *  deleted by this manager.
 *
 */

/*PAGE
 *
 *  _Signal_MP_Get_packet
 *
 */

Signal_MP_Packet *_Signal_MP_Get_packet ( void )
{
  return ( (Signal_MP_Packet *) _MPCI_Get_packet() );
}

/* end of file */