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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "scopedtimer.h"
#include <QDebug>
#include <QTime>
#include <chrono>
namespace Utils {
static QString currentTime() { return QTime::currentTime().toString(Qt::ISODateWithMs); }
using namespace std::chrono;
static const char s_scoped[] = "SCOPED TIMER";
static const char s_scopedCumulative[] = "STATIC SCOPED TIMER";
class ScopedTimerPrivate
{
public:
QString header() const {
const char *scopedTimerType = m_data.m_cumulative ? s_scopedCumulative : s_scoped;
const QString prefix = QLatin1String(scopedTimerType) + " [" + currentTime() + "] ";
const QString infix = m_data.m_message.isEmpty()
? QLatin1String(m_data.m_fileName) + ':' + QString::number(m_data.m_line)
: m_data.m_message;
return prefix + infix + ' ';
}
const ScopedTimerData m_data;
const time_point<system_clock, nanoseconds> m_start = system_clock::now();
};
ScopedTimer::ScopedTimer(const ScopedTimerData &data)
: d(new ScopedTimerPrivate{data})
{
if (d->m_data.m_cumulative)
return;
qDebug().noquote().nospace() << d->header() << "started";
}
static int64_t toMs(int64_t ns) { return ns / 1000000; }
ScopedTimer::~ScopedTimer()
{
const auto elapsed = duration_cast<nanoseconds>(system_clock::now() - d->m_start);
QString suffix;
if (d->m_data.m_cumulative) {
const int64_t nsOld = d->m_data.m_cumulative->fetch_add(elapsed.count());
const int64_t msOld = toMs(nsOld);
const int64_t nsNew = nsOld + elapsed.count();
const int64_t msNew = toMs(nsNew);
// Always report the first hit, and later, as not to clog the debug output,
// only at 10ms resolution.
if (nsOld != 0 && msOld / 10 == msNew / 10)
return;
suffix = "cumulative timeout: " + QString::number(msNew) + "ms";
} else {
suffix = "stopped with timeout: " + QString::number(toMs(elapsed.count())) + "ms";
}
qDebug().noquote().nospace() << d->header() << suffix;
}
} // namespace Utils
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