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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qperformancetimer_p.h"
#if defined(Q_OS_MAC)
#include <sys/time.h>
#include <unistd.h>
#include <mach/mach_time.h>
#elif defined(Q_OS_UNIX)
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#elif defined(Q_OS_SYMBIAN)
#include <e32std.h>
#include <sys/time.h>
#include <hal.h>
#elif defined(Q_OS_WIN)
#include <windows.h>
#endif
// mac/unix code heavily copied from QElapsedTimer
QT_BEGIN_NAMESPACE
////////////////////////////// Mac //////////////////////////////
#if defined(Q_OS_MAC)
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;
}
void QPerformanceTimer::start()
{
t1 = mach_absolute_time();
}
qint64 QPerformanceTimer::elapsed() const
{
uint64_t cpu_time = mach_absolute_time();
return absoluteToNSecs(cpu_time - t1);
}
////////////////////////////// Unix //////////////////////////////
#elif defined(Q_OS_UNIX)
#if defined(QT_NO_CLOCK_MONOTONIC) || defined(QT_BOOTSTRAPPED)
// turn off the monotonic clock
# ifdef _POSIX_MONOTONIC_CLOCK
# undef _POSIX_MONOTONIC_CLOCK
# endif
# define _POSIX_MONOTONIC_CLOCK -1
#endif
#if (_POSIX_MONOTONIC_CLOCK-0 != 0)
static const bool monotonicClockChecked = true;
static const bool monotonicClockAvailable = _POSIX_MONOTONIC_CLOCK > 0;
#else
static int monotonicClockChecked = false;
static int monotonicClockAvailable = false;
#endif
#ifdef Q_CC_GNU
# define is_likely(x) __builtin_expect((x), 1)
#else
# define is_likely(x) (x)
#endif
#define load_acquire(x) ((volatile const int&)(x))
#define store_release(x,v) ((volatile int&)(x) = (v))
static void unixCheckClockType()
{
#if (_POSIX_MONOTONIC_CLOCK-0 == 0)
if (is_likely(load_acquire(monotonicClockChecked)))
return;
# if defined(_SC_MONOTONIC_CLOCK)
// detect if the system support monotonic timers
long x = sysconf(_SC_MONOTONIC_CLOCK);
store_release(monotonicClockAvailable, x >= 200112L);
# endif
store_release(monotonicClockChecked, true);
#endif
}
static inline void do_gettime(qint64 *sec, qint64 *frac)
{
#if (_POSIX_MONOTONIC_CLOCK-0 >= 0)
unixCheckClockType();
if (is_likely(monotonicClockAvailable)) {
timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
*sec = ts.tv_sec;
*frac = ts.tv_nsec;
return;
}
#endif
*sec = 0;
*frac = 0;
}
void QPerformanceTimer::start()
{
do_gettime(&t1, &t2);
}
qint64 QPerformanceTimer::elapsed() const
{
qint64 sec, frac;
do_gettime(&sec, &frac);
sec = sec - t1;
frac = frac - t2;
return sec * Q_INT64_C(1000000000) + frac;
}
////////////////////////////// Symbian //////////////////////////////
#elif defined(Q_OS_SYMBIAN)
static qint64 getTimeFromTick(quint64 elapsed)
{
static TInt freq;
if (!freq)
HAL::Get(HALData::EFastCounterFrequency, freq);
// ### not sure on units
return elapsed / freq;
}
void QPerformanceTimer::start()
{
t1 = User::FastCounter();
}
qint64 QPerformanceTimer::elapsed() const
{
return getTimeFromTick(User::FastCounter() - t1);
}
////////////////////////////// Windows //////////////////////////////
#elif defined(Q_OS_WIN)
static qint64 getTimeFromTick(quint64 elapsed)
{
static LARGE_INTEGER freq;
if (!freq.QuadPart)
QueryPerformanceFrequency(&freq);
return 1000000000 * elapsed / freq.QuadPart;
}
void QPerformanceTimer::start()
{
LARGE_INTEGER li;
QueryPerformanceCounter(&li);
t1 = li.QuadPart;
}
qint64 QPerformanceTimer::elapsed() const
{
LARGE_INTEGER li;
QueryPerformanceCounter(&li);
return getTimeFromTick(li.QuadPart - t1);
}
////////////////////////////// Default //////////////////////////////
#else
// default implementation (no hi-perf timer) does nothing
void QPerformanceTimer::start()
{
}
qint64 QPerformanceTimer::elapsed() const
{
return 0;
}
#endif
QT_END_NAMESPACE
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