sc_join.h

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

  sc_join.h -- Join Process Synchronization Definition

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

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

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  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
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// $Log: sc_join.h,v $
// Revision 1.1.1.1  2006/12/15 20:31:37  acg
// SystemC 2.2
//
// 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.
//

#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:
    inline sc_join();
    virtual inline ~sc_join();
    void add_process( sc_process_handle process_h );
    inline int process_count();
    virtual void signal(sc_thread_handle thread_p, int type);
    inline void wait();
    inline void wait_clocked();

  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.
};

sc_join::sc_join() : m_threads_n(0) { }

sc_join::~sc_join() {}


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

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

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

// suspend a thread that has a sensitivity list:

inline void sc_join::wait_clocked()
{
    do { ::sc_core::wait(); } 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

#endif // SC_JOIN_H

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