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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
// ask for the latest POSIX, just in case
#define _POSIX_C_SOURCE 200809L
#include "qelapsedtimer.h"
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <mach/mach_time.h>
#include <private/qcore_unix_p.h>
QT_BEGIN_NAMESPACE
QElapsedTimer::ClockType QElapsedTimer::clockType() Q_DECL_NOTHROW
{
return MachAbsoluteTime;
}
bool QElapsedTimer::isMonotonic() Q_DECL_NOTHROW
{
return true;
}
static mach_timebase_info_data_t info = {0,0};
static qint64 absoluteToNSecs(qint64 cpuTime)
{
if (info.denom == 0)
mach_timebase_info(&info);
#ifdef __LP64__
__uint128_t nsecs = static_cast<__uint128_t>(cpuTime) * info.numer / info.denom;
return static_cast<qint64>(nsecs);
#else
qint64 nsecs = cpuTime * info.numer / info.denom;
return nsecs;
#endif
}
static qint64 absoluteToMSecs(qint64 cpuTime)
{
return absoluteToNSecs(cpuTime) / 1000000;
}
timespec qt_gettime() Q_DECL_NOTHROW
{
timespec tv;
uint64_t cpu_time = mach_absolute_time();
uint64_t nsecs = absoluteToNSecs(cpu_time);
tv.tv_sec = nsecs / 1000000000ull;
tv.tv_nsec = nsecs - (tv.tv_sec * 1000000000ull);
return tv;
}
void qt_nanosleep(timespec amount)
{
// Mac doesn't have clock_nanosleep, but it does have nanosleep.
// nanosleep is POSIX.1-1993
int r;
EINTR_LOOP(r, nanosleep(&amount, &amount));
}
void QElapsedTimer::start() Q_DECL_NOTHROW
{
t1 = mach_absolute_time();
t2 = 0;
}
qint64 QElapsedTimer::restart() Q_DECL_NOTHROW
{
qint64 old = t1;
t1 = mach_absolute_time();
t2 = 0;
return absoluteToMSecs(t1 - old);
}
qint64 QElapsedTimer::nsecsElapsed() const Q_DECL_NOTHROW
{
uint64_t cpu_time = mach_absolute_time();
return absoluteToNSecs(cpu_time - t1);
}
qint64 QElapsedTimer::elapsed() const Q_DECL_NOTHROW
{
uint64_t cpu_time = mach_absolute_time();
return absoluteToMSecs(cpu_time - t1);
}
qint64 QElapsedTimer::msecsSinceReference() const Q_DECL_NOTHROW
{
return absoluteToMSecs(t1);
}
qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW
{
return absoluteToMSecs(other.t1 - t1);
}
qint64 QElapsedTimer::secsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW
{
return msecsTo(other) / 1000;
}
bool operator<(const QElapsedTimer &v1, const QElapsedTimer &v2) Q_DECL_NOTHROW
{
return v1.t1 < v2.t1;
}
QT_END_NAMESPACE
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