wownero/src/common/perf_timer.h

// Copyright (c) 2016, The Monero Project
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
// 
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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#pragma once

#include <string>
#include <stdio.h>
#include "misc_log_ex.h"

namespace tools
{

class PerformanceTimer;

extern int performance_timer_log_level;
extern __thread std::vector<PerformanceTimer*> *performance_timers;

class PerformanceTimer
{
public:
  PerformanceTimer(const std::string &s, int l = LOG_LEVEL_2): name(s), level(l), started(false)
  {
    ticks = epee::misc_utils::get_tick_count();
    if (!performance_timers)
    {
      LOG_PRINT("PERF             ----------", level);
      performance_timers = new std::vector<PerformanceTimer*>();
    }
    else
    {
      PerformanceTimer *pt = performance_timers->back();
      if (!pt->started)
      {
        LOG_PRINT("PERF           " << std::string((performance_timers->size()-1) * 2, ' ') << "  " << pt->name, pt->level);
        pt->started = true;
      }
    }
    performance_timers->push_back(this);
  }

  ~PerformanceTimer()
  {
    performance_timers->pop_back();
    ticks = epee::misc_utils::get_tick_count() - ticks;
    char s[12];
    snprintf(s, sizeof(s), "%8lu  ", ticks);
    LOG_PRINT("PERF " << s << std::string(performance_timers->size() * 2, ' ') << "  " << name, level);
    if (performance_timers->empty())
    {
      delete performance_timers;
      performance_timers = NULL;
    }
  }

private:
  std::string name;
  int level;
  uint64_t ticks;
  bool started;
};

void set_performance_timer_log_level(int level);

#define PERF_TIMER(name) tools::PerformanceTimer pt_##name(#name, tools::performance_timer_log_level)
#define PERF_TIMER_L(name, l) tools::PerformanceTimer pt_##name(#name, l)

}