cppcheck/lib/timer.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2023 Cppcheck team.
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*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "timer.h"
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#include <algorithm>
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#include <iostream>
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#include <utility>
#include <vector>
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/*
TODO:
- rename "file" to "single"
- synchronise map access in multithreaded mode or disable timing
- add unit tests
- for --showtime (needs input file)
- for Timer* classes
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*/
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namespace {
using dataElementType = std::pair<std::string, struct TimerResultsData>;
bool more_second_sec(const dataElementType& lhs, const dataElementType& rhs)
{
return lhs.second.seconds() > rhs.second.seconds();
}
}
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void TimerResults::showResults(SHOWTIME_MODES mode) const
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{
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if (mode == SHOWTIME_MODES::SHOWTIME_NONE)
return;
std::cout << std::endl;
TimerResultsData overallData;
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std::vector<dataElementType> data;
data.reserve(mResults.size());
{
std::lock_guard<std::mutex> l(mResultsSync);
data.insert(data.begin(), mResults.cbegin(), mResults.cend());
}
std::sort(data.begin(), data.end(), more_second_sec);
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size_t ordinal = 1; // maybe it would be nice to have an ordinal in output later!
for (std::vector<dataElementType>::const_iterator iter=data.cbegin(); iter!=data.cend(); ++iter) {
const double sec = iter->second.seconds();
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const double secAverage = sec / (double)(iter->second.mNumberOfResults);
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overallData.mClocks += iter->second.mClocks;
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if ((mode != SHOWTIME_MODES::SHOWTIME_TOP5) || (ordinal<=5)) {
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std::cout << iter->first << ": " << sec << "s (avg. " << secAverage << "s - " << iter->second.mNumberOfResults << " result(s))" << std::endl;
}
++ordinal;
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}
const double secOverall = overallData.seconds();
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std::cout << "Overall time: " << secOverall << "s" << std::endl;
}
void TimerResults::addResults(const std::string& str, std::clock_t clocks)
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{
std::lock_guard<std::mutex> l(mResultsSync);
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mResults[str].mClocks += clocks;
mResults[str].mNumberOfResults++;
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}
Timer::Timer(std::string str, SHOWTIME_MODES showtimeMode, TimerResultsIntf* timerResults)
: mStr(std::move(str))
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, mTimerResults(timerResults)
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, mStart(0)
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, mShowTimeMode(showtimeMode)
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, mStopped(false)
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{
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if (showtimeMode != SHOWTIME_MODES::SHOWTIME_NONE)
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mStart = std::clock();
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}
Timer::~Timer()
{
stop();
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}
void Timer::stop()
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{
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if ((mShowTimeMode != SHOWTIME_MODES::SHOWTIME_NONE) && !mStopped) {
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const std::clock_t end = std::clock();
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const std::clock_t diff = end - mStart;
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if (mShowTimeMode == SHOWTIME_MODES::SHOWTIME_FILE) {
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const double sec = (double)diff / CLOCKS_PER_SEC;
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std::cout << mStr << ": " << sec << "s" << std::endl;
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} else {
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if (mTimerResults)
mTimerResults->addResults(mStr, diff);
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}
}
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mStopped = true;
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}