LWHistStats.h

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
 
//                                                            //
//  Header file for class LWHistStats                         //
//                                                            //
//  Description: Access to various statistics                 //
//                                                            //
//  Author: Thomas H. Kittelmann (Thomas.Kittelmann@cern.ch)  //
//  Initial version: October 2009                             //
//                                                            //
 
#ifndef LWHISTSTATS_H
#define LWHISTSTATS_H
 
#include <atomic>
 
class LWHistStats {
public:
  static long nActiveLWHists() { return s_nActiveHists; }
 
  static long long getTotalPoolMemAllocated();
  static long long getTotalPoolMemUsed();
 
  //Not more info, but for convenience:
  static long long getMemUnusedButAllocatedInPools();
  static double poolWasteFraction();//0: perfect, 1: very bad
 
private:
  LWHistStats(){}
  ~LWHistStats(){}
  static std::atomic<long> s_nActiveHists;
  friend class LWHist;
};
 
#endif