/**************************************************************************** | |
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). | |
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** This file is part of the QtDeclarative module of the Qt Toolkit. | |
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** rights. These rights are described in the Nokia Qt LGPL Exception | |
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** | |
** GNU General Public License Usage | |
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#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_SYMBIAN) | |
#include <e32std.h> | |
#include <sys/time.h> | |
#include <hal.h> | |
#include <hal_data.h> | |
#elif defined(Q_OS_UNIX) | |
#include <sys/time.h> | |
#include <time.h> | |
#include <unistd.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); | |
} | |
////////////////////////////// Symbian ////////////////////////////// | |
#elif defined(Q_OS_SYMBIAN) | |
static qint64 getTimeFromTick(quint64 elapsed) | |
{ | |
static TInt freq = 0; | |
if (!freq) | |
HAL::Get(HALData::EFastCounterFrequency, freq); | |
return (elapsed * 1000000000) / freq; | |
} | |
void QPerformanceTimer::start() | |
{ | |
t1 = User::FastCounter(); | |
} | |
qint64 QPerformanceTimer::elapsed() const | |
{ | |
return getTimeFromTick(User::FastCounter() - 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; | |
} | |
////////////////////////////// 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 | |