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wefts_cond.h

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/*
   wefts_cond.h
   Abstract class implementing a condition variable.

   $Id: wefts_cond.h,v 1.10 2003/12/16 03:07:48 jonnymind Exp $
----------------------------------------------
   Begin      : 2003-08-02 00:10
   Author     : Giancarlo Niccolai

   Last modified because:
   Implementing OS independent base threading
*/

/**************************************************************************
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU Library General Public License as       *
*   published by the Free Software Foundation; either version 2.1 of the  *
*   License, or (at your option) any later version.                       *
***************************************************************************/

#ifndef WT_COND_H
#define WT_COND_H

#include <wefts_mutex.h>
#include <wefts_cleanup.h>

namespace Wefts {

class Condition
{
protected:
   OSCondition m_cond;
   Mutex *m_my_mutex;
   CleanupItem m_whenStopped;


public:
   Condition( Mutex *mtx=0 ) { m_my_mutex = mtx; m_whenStopped.first = 0;}
   ~Condition() {}

   virtual inline bool wait() {
      return m_cond.wait( m_my_mutex->m_mutex, m_whenStopped );
   }

   void setMutex( Mutex *mtx) { m_my_mutex = mtx; }

   virtual inline bool wait( long seconds, long nanoseconds)
   {
      return m_cond.timedWait( m_my_mutex->m_mutex, seconds, nanoseconds, m_whenStopped );
   }


   inline int wait( double seconds )
   {
      return wait( long( seconds ),
         long( (seconds - long(seconds)) *1000000000l) );
   }

   virtual inline void signal() { m_cond.signal(); }

   inline void onStop( CleanupHandler *guard=0, int param=0) {
      m_whenStopped.first = guard;
      m_whenStopped.second = param;
   }
};

}

#endif
/* end of wefts_cond.h */

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