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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef DEBUG_PERF_HEADER
#define DEBUG_PERF_HEADER
#include "deprecate.h"
#include "tick_count.h"
#ifdef FFS_WIN
#include <sstream>
#else
#include <iostream>
#endif
//############# two macros for quick performance measurements ###############
#define PERF_START zen::PerfTimer perfTest;
#define PERF_STOP perfTest.showResult();
//###########################################################################
namespace zen
{
class PerfTimer
{
public:
class TimerError {};
ZEN_DEPRECATE
PerfTimer() : ticksPerSec_(ticksPerSec()), startTime(), resultShown(false)
{
//std::clock() - "counts CPU time in C and wall time in VC++" - WTF!???
#ifdef FFS_WIN
if (::SetThreadAffinityMask(::GetCurrentThread(), 1) == 0) throw TimerError(); //"should not be required unless there are bugs in BIOS or HAL" - msdn, QueryPerformanceCounter
#endif
startTime = getTicks();
if (ticksPerSec_ == 0 || !startTime.isValid())
throw TimerError();
}
~PerfTimer() { if (!resultShown) showResult(); }
void showResult()
{
const TickVal now = getTicks();
if (!now.isValid())
throw TimerError();
const auto delta = static_cast<long>(1000.0 * (now - startTime) / ticksPerSec_);
#ifdef FFS_WIN
std::ostringstream ss;
ss << delta << " ms";
::MessageBoxA(nullptr, ss.str().c_str(), "Timer", 0);
#else
std::clog << "Perf: duration: " << delta << " ms\n";
#endif
resultShown = true;
startTime = getTicks(); //don't include call to MessageBox()!
if (!startTime.isValid())
throw TimerError();
}
private:
const std::int64_t ticksPerSec_;
TickVal startTime;
bool resultShown;
};
}
#endif //DEBUG_PERF_HEADER
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