MemoryMonitor.h

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#ifndef OSMSCOUT_UTIL_MEMORYMONITOR_H
#define OSMSCOUT_UTIL_MEMORYMONITOR_H
 
/*
  This source is part of the libosmscout library
  Copyright (C) 2016 Tim Teulings
 
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
 
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*/
 
#include <atomic>
#include <mutex>
#include <thread>
 
#include <osmscout/lib/CoreImportExport.h>
 
#include <osmscout/system/Compiler.h>
 
namespace osmscout {

  class OSMSCOUT_API MemoryMonitor CLASS_FINAL
  {
  private:
    std::atomic<bool> quit=false;
    std::mutex        mutex;
    double            maxVMUsage=0.0;
    double            maxResidentSet=0.0;
    std::thread       thread;
 
  private:
    void SignalStop();
    void BackgroundJob();
    void Measure();
 
  public:
    MemoryMonitor();
    MemoryMonitor(const MemoryMonitor& other) = delete;
    MemoryMonitor(MemoryMonitor&& other) = delete;
    MemoryMonitor& operator=(const MemoryMonitor& other) = delete;
    MemoryMonitor& operator=(MemoryMonitor&& other) = delete;
    ~MemoryMonitor();
 
    void GetMaxValue(double& vmUsage,
                     double& residentSet);
 
    void Reset();
  };
 
}
 
#endif