scx_barrier.h

system C源码 一种替代verilog的语言

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

  The following code is derived, directly or indirectly, from the SystemC
  source code Copyright (c) 1996-2006 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 Version 2.4 (the "License");
  You may not use this file except in compliance with such restrictions and
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  License at http://www.systemc.org/. Software distributed by Contributors
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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.

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#ifndef SCX_BARRIER_H
#define SCX_BARRIER_H

namespace sc_core {

// -----------------------------------------------------------------------------
// CLASS scx_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 scx_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_core

#endif // SCX_BARRIER_H