src/sysc/communication/sc_mutex.h

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

  The following code is derived, directly or indirectly, from the SystemC
  source code Copyright (c) 1996-2005 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");
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  License at http://www.systemc.org/. Software distributed by Contributors
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 *****************************************************************************/

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

  sc_mutex.h -- The sc_mutex primitive channel class.

  Original Author: Martin Janssen, Synopsys, Inc., 2001-05-21

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

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

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
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#ifndef SC_MUTEX_H
#define SC_MUTEX_H

#include "sysc/kernel/sc_event.h"
#include "sysc/communication/sc_prim_channel.h"
#include "sysc/communication/sc_mutex_if.h"

namespace sc_core {

// ----------------------------------------------------------------------------
//  CLASS : sc_mutex
//
//  The sc_mutex primitive channel class.
// ----------------------------------------------------------------------------

class sc_mutex
: public sc_mutex_if,
  public sc_prim_channel
{
public:

    // constructors

    sc_mutex();
    explicit sc_mutex( const char* name_ );


    // interface methods

    // blocks until mutex could be locked
    virtual int lock();

    // returns -1 if mutex could not be locked
    virtual int trylock();

    // returns -1 if mutex was not locked by caller
    virtual int unlock();

    virtual const char* kind() const
        { return "sc_mutex"; }

protected:

    // support methods

    bool in_use() const
        { return ( m_owner != 0 ); }

protected:

    sc_process_b* m_owner;
    sc_event      m_free;

private:

    // disabled
    sc_mutex( const sc_mutex& );
    sc_mutex& operator = ( const sc_mutex& );
};

} // namespace sc_core

#endif

// Taf!

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