xref: /gem5/ext/systemc/src/sysc/kernel/sc_wait_cthread.cpp

/*****************************************************************************

  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
  more contributor license agreements.  See the NOTICE file distributed
  with this work for additional information regarding copyright ownership.
  Accellera licenses this file to you under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with the
  License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  implied.  See the License for the specific language governing
  permissions and limitations under the License.

 *****************************************************************************/

/*****************************************************************************

  sc_wait_cthread.cpp -- Wait() and related functions for SC_CTHREADs.

  Original Author: Stan Y. Liao, Synopsys, Inc.
                   Martin Janssen, Synopsys, Inc.

  CHANGE LOG AT THE END OF THE FILE
 *****************************************************************************/



#include "sysc/kernel/sc_kernel_ids.h"
#include "sysc/kernel/sc_cthread_process.h"
#include "sysc/kernel/sc_simcontext_int.h"
#include "sysc/kernel/sc_wait_cthread.h"
#include "sysc/communication/sc_port.h"
#include "sysc/kernel/sc_wait.h"
namespace sc_core
{

// for SC_CTHREADs

void
halt( sc_simcontext* simc )
{
    sc_curr_proc_handle cpi = simc->get_curr_proc_info();
    switch( cpi->kind ) {
    case SC_CTHREAD_PROC_: {
	RCAST<sc_cthread_handle>( cpi->process_handle )->wait_halt();
	break;
    }
    default:
	SC_REPORT_ERROR( SC_ID_HALT_NOT_ALLOWED_, 0 );
	break;
    }
}


void
wait( int n, sc_simcontext* simc )
{
    sc_curr_proc_handle cpi = simc->get_curr_proc_info();
    if( n <= 0 ) {
	char msg[BUFSIZ];
	std::sprintf( msg, "n = %d", n );
	SC_REPORT_ERROR( SC_ID_WAIT_N_INVALID_, msg );
    }
    switch( cpi->kind ) {
      case SC_THREAD_PROC_:
      case SC_CTHREAD_PROC_:
	RCAST<sc_cthread_handle>( cpi->process_handle )->wait_cycles( n );
        break;
      default:
        SC_REPORT_ERROR( SC_ID_WAIT_NOT_ALLOWED_, "\n        "
	                 "in SC_METHODs use next_trigger() instead" );
        break;
    }
}


void
at_posedge( const sc_signal_in_if<bool>& s, sc_simcontext* simc )
{
    if( s.read() == true )
        do { wait(simc); } while ( s.read() == true );
    do { wait(simc); } while ( s.read() == false );
}

void
at_posedge( const sc_signal_in_if<sc_dt::sc_logic>& s, sc_simcontext* simc )
{
    if( s.read() == '1' )
        do { wait(simc); } while ( s.read() == '1' );
    do { wait(simc); } while ( s.read() == '0' );
}

void
at_negedge( const sc_signal_in_if<bool>& s, sc_simcontext* simc )
{
    if( s.read() == false )
        do { wait(simc); } while ( s.read() == false );
    do { wait(simc); } while ( s.read() == true );
}

void
at_negedge( const sc_signal_in_if<sc_dt::sc_logic>& s, sc_simcontext* simc )
{
    if( s.read() == '0' )
        do { wait(simc); } while ( s.read() == '0' );
    do { wait(simc); } while ( s.read() == '1' );
}


} // namespace sc_core

/*
$Log: sc_wait_cthread.cpp,v $
Revision 1.6  2011/08/26 20:46:11  acg
 Andy Goodrich: moved the modification log to the end of the file to
 eliminate source line number skew when check-ins are done.

Revision 1.5  2011/02/18 20:27:14  acg
 Andy Goodrich: Updated Copyrights.

Revision 1.4  2011/02/13 21:47:38  acg
 Andy Goodrich: update copyright notice.

Revision 1.3  2009/10/14 19:07:42  acg
 Andy Goodrich: added an error message for wait(n) being called from an
 SC_METHOD.

Revision 1.2  2008/05/22 17:06:27  acg
 Andy Goodrich: updated copyright notice to include 2008.

Revision 1.1.1.1  2006/12/15 20:20:05  acg
SystemC 2.3

Revision 1.3  2006/03/13 20:26:51  acg
 Andy Goodrich: Addition of forward class declarations, e.g.,
 sc_reset, to keep gcc 4.x happy.

Revision 1.2  2006/01/03 23:18:45  acg
Changed copyright to include 2006.

Revision 1.1.1.1  2005/12/19 23:16:44  acg
First check in of SystemC 2.1 into its own archive.

Revision 1.10  2005/09/15 23:02:18  acg
Added std:: prefix to appropriate methods and types to get around
issues with the Edison Front End.

Revision 1.9  2005/09/02 19:03:30  acg
Changes for dynamic processes. Removal of lambda support.

Revision 1.8  2005/04/04 00:16:08  acg
Changes for directory name change to sys from systemc.
Changes for sc_string going to std::string.
Changes for sc_pvector going to std::vector.
Changes for reference pools for bit and part selections.
Changes for const sc_concatref support.

Revision 1.5  2004/09/27 20:49:10  acg
Andy Goodrich, Forte Design Systems, Inc.
   - Added a $Log comment so that CVS checkin comments appear in the
     checkout source.

*/

// Taf!