MemStatsHooks.h

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
// MemStatsHooks.h 
// Author: S.Binet<binet@cern.ch>
#ifndef PERFMONEVENT_PERFMONMEMSTATSHOOKS_H 
#define PERFMONEVENT_PERFMONMEMSTATSHOOKS_H 1
 
#include "CxxUtils/checker_macros.h"
 
#include <stddef.h>
#include <stdlib.h>
#include <atomic>
#ifndef __APPLE__
#include <malloc.h>
#endif
 
// forward declarations
 
namespace PerfMon {
 
struct MemStats
{
  static std::atomic<bool> m_enabled;
 
  static unsigned long long m_nbytes ATLAS_THREAD_SAFE;
 
  static unsigned long long m_nmallocs ATLAS_THREAD_SAFE;
 
  static unsigned long long m_nfrees ATLAS_THREAD_SAFE;
 
  static bool enable(const bool flag)
  {
    bool old_value = m_enabled;
    m_enabled = flag;
    return old_value;
  }
 
  static void installHooks();
 
  static void uninstallHooks();
 
  static void saveHooks();
 
  static bool enabled() { return m_enabled; }
  static unsigned long long nbytes() { return m_nbytes; }
  static unsigned long long nmallocs() { return m_nmallocs; }
  static unsigned long long nfrees() { return m_nfrees; }
 
  static void start();
  static void stop();
};
 
} //> namespace PerfMon
 
#endif// PERFMONEVENT_PERFMONMEMSTATSHOOKS_H