147 lines
4.1 KiB
C++
147 lines
4.1 KiB
C++
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
|
|
** Contact: http://www.qt-project.org/legal
|
|
**
|
|
** 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 Digia. For licensing terms and
|
|
** conditions see http://qt.digia.com/licensing. For further information
|
|
** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
|
|
** Foundation and appearing in the file LICENSE.LGPL included in the
|
|
** packaging of this file. Please review the following information to
|
|
** ensure the GNU Lesser General Public License version 2.1 requirements
|
|
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
|
**
|
|
** In addition, as a special exception, Digia gives you certain additional
|
|
** rights. These rights are described in the Digia Qt LGPL Exception
|
|
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
|
|
**
|
|
** GNU General Public License Usage
|
|
** Alternatively, this file may be used under the terms of the GNU
|
|
** General Public License version 3.0 as published by the Free Software
|
|
** Foundation and appearing in the file LICENSE.GPL included in the
|
|
** packaging of this file. Please review the following information to
|
|
** ensure the GNU General Public License version 3.0 requirements will be
|
|
** met: http://www.gnu.org/copyleft/gpl.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);
|
|
qint64 nsecs = cpuTime * info.numer / info.denom;
|
|
return nsecs;
|
|
}
|
|
|
|
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
|