safe_roller.h

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#ifndef SAFE_ROLLER_CLASS
#define SAFE_ROLLER_CLASS
 
/*****************************************************************************\
*                                                                             *
*  Name   : safe_roller                                                       *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 1998-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/
 
#include <basis/mutex.h>
#include <structures/roller.h>
 
namespace processes {
 
 
class safe_roller
{
public:
  safe_roller(int start_of_range = 0, int end_of_range = MAXINT32);
 
  ~safe_roller();
 
  int next_id();
 
  int current() const;
 
  void set_current(int new_current);
 
private:
  structures::int_roller *_rolling;  
  basis::mutex *_lock;  
 
  // forbidden...
  safe_roller(const safe_roller &);
  safe_roller &operator =(const safe_roller &);
};
 
 
void safe_add(int &to_change, int addition);
 
} //namespace.
 
#endif