sc_join.h

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  source code Copyright (c) 1996-2014 by all Contributors.
  All Rights reserved.

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  set forth in the SystemC Open Source License (the "License");
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 *****************************************************************************/

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

  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