---

wefts_counter.h

Go to the documentation of this file.

/*
   wefts_counter.h
   Shared counter.

   $Id: wefts_counter.h,v 1.3 2003/08/13 14:58:52 jonnymind Exp $
----------------------------------------------
   Begin      : 2003-08-02 00:10
   Author     : Giancarlo Niccolai

   Last modified because:

*/

/**************************************************************************
*   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_COUNTER_H
#define WT_COUNTER_H

#include <wefts_fastcond.h>

namespace Wefts {

class Counter: public FastCondition
{
private:
   volatile int m_count;

public:
   Counter( int count = 0 ) { m_count = count; }

   int count() { return m_count; }

   void set( int value ) { m_count = value; }

   void count( int value ) { lock(); m_count = value; signal(); unlock();}

   void increment( int amount ) { lock(); m_count += amount; signal(); unlock();}

   void increment() { lock(); m_count ++; signal(); unlock(); }

   void decrement() { lock(); m_count --; signal(); unlock();}

   bool until( int level, double time = 0 )
   {
      lock();
      while( level != m_count ) {
         if ( time == 0 ) {
            if (! wait() )
               return false;
         }
         else {
            if (! wait( time ) )
               return false;
         }
      }
      unlock();
      return true;
   }


};

}

#endif
/* end of wefts_counter.h */

---