Enumerator.h

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// This file is part of the Peano project. For conditions of distribution and
// use, please see the copyright notice at www.peano-framework.org
#pragma once
 
 
#include "tarch/logging/Log.h"
#include "tarch/multicore/BooleanSemaphore.h"
#include <set>
#include <string>
 
 
namespace tarch {
  class Enumerator;
}
 
class tarch::Enumerator {
  public:
    static constexpr int NoNumber = -1;
 
    Enumerator(int max = std::numeric_limits<int>::max()-2 );
 
    void reset();
 
    void setMax( int max );
 
    int getNumber();
 
    void releaseNumber( int value );
 
    int size() const;
 
    std::string toString() const;
 
  private:
    static tarch::logging::Log         _log;
 
    tarch::multicore::BooleanSemaphore _semaphore;
    std::set<int>                      _activeNumbers;
    int                                _max;
    int                                _lastNumberHandedOut;
};