xref: /gem5/src/systemc/tests/systemc/kernel/dynamic_processes/sc_barrier/test01/sc_barrier.h

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

  sc_barrier.h -- Barrier Process Synchronization Definition

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

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

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

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.

      Name, Affiliation, Date:
  Description of Modification:

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// $Log: sc_barrier.h,v $
// Revision 1.1.1.1  2006/12/15 20:26:03  acg
// systemc_tests-2.3
//
// Revision 1.2  2006/01/24 21:04:52  acg
//  Andy Goodrich: replacement of deprecated features with their non-deprecated
//  counterparts.
//

#ifndef SC_BARRIER_H
#define SC_BARRIER_H

namespace sc_dp {

// -----------------------------------------------------------------------------
// CLASS sc_barrier
//
// This class provides a way of synchronising a set of processes. Each process
// calls the wait() method and one all processes have called that method they
// will all be released for execution.
// -----------------------------------------------------------------------------

class sc_barrier {
  public:
    void initialize( int thread_n )
    {
        m_thread_n = thread_n;
    }

    void wait()
    {
        m_thread_n--;
        if ( m_thread_n )
        {
            ::sc_core::wait(m_barrier_event);
        }
        else
        {
            m_barrier_event.notify(SC_ZERO_TIME);
            ::sc_core::wait(m_barrier_event);
        }
    }

  protected:
    sc_event m_barrier_event;   // Event to wait on.
    int      m_thread_n;        // # of threads left to wait.
};

} // namespace sc_dp

#endif // SC_BARRIER_H