memory_limiter.h

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#ifndef MEMORY_LIMITER_CLASS
#define MEMORY_LIMITER_CLASS

/*****************************************************************************\
*                                                                             *
*  Name   : memory_limiter                                                    *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 2001-$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 "data_structure_dll.h"

#include <basis/object_base.h>

// forward.
class ml_memory_record;
class ml_memory_state_meter;


class DATA_STRUCTURE_CLASS_STYLE memory_limiter
{
public:
  memory_limiter(int overall_limit, int individual_limit);

  virtual ~memory_limiter();

  IMPLEMENT_CLASS_NAME("memory_limiter");

  int overall_limit() const { return _overall_limit; }
  int individual_limit() const { return _individual_limit; }

  int overall_usage() const { return _overall_size; }

  int overall_space_left() const { return overall_limit() - overall_usage(); }

  int individual_usage(int individual) const;

  int individual_space_left(int individual) const;

  istring text_form(int indent = 0) const;

  bool okay_allocation(int individual, int memory_desired);

  bool record_deletion(int individual, int memory_deleted);

  void reset();

  const int_set &individuals_listed() const;

private:
  int _overall_limit;  
  int _individual_limit;  
  int _overall_size;  
  ml_memory_state_meter *_individual_sizes;  

  ml_memory_record *find_individual(int individual) const;
};

#endif

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