sysc/kernel/sc_join.h

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

  The following code is derived, directly or indirectly, from the SystemC
  source code Copyright (c) 1996-2014 by all Contributors.
  All Rights reserved.

  The contents of this file are subject to the restrictions and limitations
  set forth in the SystemC Open Source License (the "License");
  You may not use this file except in compliance with such restrictions and
  limitations. You may obtain instructions on how to receive a copy of the
  License at http://www.accellera.org/. Software distributed by Contributors
  under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
  ANY KIND, either express or implied. See the License for the specific
  language governing rights and limitations under the License.

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

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

  sc_join.h -- Join Process Synchronization Definition

  Original Author: Andy Goodrich, Forte Design Systems, 5 May 2003

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

// $Log: sc_join.h,v $
// Revision 1.8  2011/08/26 21:45:00  acg
//  Andy Goodrich: fix internal event naming.
//
// Revision 1.7  2011/08/26 20:46:09  acg
//  Andy Goodrich: moved the modification log to the end of the file to
//  eliminate source line number skew when check-ins are done.
//

#ifndef SC_JOIN_H
#define SC_JOIN_H

#include "sysc/kernel/sc_process.h"
#include "sysc/kernel/sc_wait.h"

namespace sc_core {

//==============================================================================
// CLASS sc_join
//
// This class provides a way of waiting for a set of threads to complete their
// execution. The threads whose completion is to be monitored are registered,
// and upon their completion an event notification will occur.
//==============================================================================
class sc_join : public sc_process_monitor {
    friend class sc_process_b;
    friend class sc_process_handle;
  public:
    sc_join();
    void add_process( sc_process_handle process_h );
    inline int process_count();
    virtual void signal(sc_thread_handle thread_p, int type);

    // 08/19/2015 GL: modified for the OoO simulation
    inline void wait( int seg_id );

    // 08/19/2015 GL: modified for the OoO simulation
    inline void wait_clocked( int seg_id );

  protected: 
    void add_process( sc_process_b* process_p );

  protected:
    sc_event m_join_event;  // Event to notify when all threads have reported.
    int      m_threads_n;   // # of threads still need to wait for.
};

int sc_join::process_count() { return m_threads_n; }

// 08/19/2015 GL: modified for the OoO simulation

// suspend a thread that does not have a sensitivity list:

inline void sc_join::wait( int seg_id )
{ ::sc_core::wait(m_join_event, seg_id); }

// suspend a thread that has a sensitivity list:

inline void sc_join::wait_clocked( int seg_id )
{
    do { ::sc_core::wait( seg_id ); } while (m_threads_n != 0);
}

#define SC_CJOIN \
    }; \
    sc_core::sc_join           join; \
    for ( unsigned int i = 0; \
        i < sizeof(forkees)/sizeof(sc_core::sc_process_handle); \
        i++ ) \
        join.add_process(forkees[i]); \
    join.wait_clocked(); \
}

#define SC_FORK \
{ \
    sc_core::sc_process_handle forkees[] = {

#define SC_JOIN \
    }; \
    sc_core::sc_join           join; \
    for ( unsigned int i = 0; \
        i < sizeof(forkees)/sizeof(sc_core::sc_process_handle); \
        i++ ) \
        join.add_process(forkees[i]); \
    join.wait(); \
}

} // namespace sc_core

// Revision 1.6  2011/08/24 22:05:50  acg
//  Torsten Maehne: initialization changes to remove warnings.
//
// Revision 1.5  2011/02/18 20:27:14  acg
//  Andy Goodrich: Updated Copyrights.
//
// Revision 1.4  2011/02/13 21:47:37  acg
//  Andy Goodrich: update copyright notice.
//
// Revision 1.3  2009/07/28 01:10:53  acg
//  Andy Goodrich: updates for 2.3 release candidate.
//
// Revision 1.2  2008/05/22 17:06:25  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 1.5  2006/04/28 21:38:27  acg
//  Andy Goodrich: fixed loop constraint that was using sizeof(sc_thread_handle)
//  rather than sizeof(sc_process_handle).
//
// Revision 1.4  2006/01/13 18:44:29  acg
// Added $Log to record CVS changes into the source.

#endif // SC_JOIN_H

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