/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** This file is part of the QtCore module of the Qt Toolkit. | |
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** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
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** rights. These rights are described in the Nokia Qt LGPL Exception | |
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. | |
** | |
** GNU General Public License Usage | |
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** file. Please review the following information to ensure the GNU General | |
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****************************************************************************/ | |
#include "qelapsedtimer.h" | |
#include "qpair.h" | |
#include <e32std.h> | |
#include <sys/time.h> | |
#include <hal.h> | |
QT_BEGIN_NAMESPACE | |
// return quint64 to avoid sign-extension | |
static quint64 getMicrosecondFromTick() | |
{ | |
static TInt nanokernel_tick_period; | |
if (!nanokernel_tick_period) | |
HAL::Get(HAL::ENanoTickPeriod, nanokernel_tick_period); | |
static quint32 highdword = 0; | |
static quint32 lastval = 0; | |
quint32 val = User::NTickCount(); | |
if (val < lastval) | |
++highdword; | |
lastval = val; | |
return nanokernel_tick_period * (val | (quint64(highdword) << 32)); | |
} | |
static quint64 getMillisecondFromTick() | |
{ | |
return getMicrosecondFromTick() / 1000; | |
} | |
timeval qt_gettime() | |
{ | |
timeval tv; | |
quint64 now = getMicrosecondFromTick(); | |
tv.tv_sec = now / 1000000; | |
tv.tv_usec = now % 1000000; | |
return tv; | |
} | |
QElapsedTimer::ClockType QElapsedTimer::clockType() | |
{ | |
return TickCounter; | |
} | |
bool QElapsedTimer::isMonotonic() | |
{ | |
return true; | |
} | |
void QElapsedTimer::start() | |
{ | |
t1 = getMillisecondFromTick(); | |
t2 = 0; | |
} | |
qint64 QElapsedTimer::restart() | |
{ | |
qint64 oldt1 = t1; | |
t1 = getMillisecondFromTick(); | |
t2 = 0; | |
return t1 - oldt1; | |
} | |
qint64 QElapsedTimer::elapsed() const | |
{ | |
return getMillisecondFromTick() - t1; | |
} | |
qint64 QElapsedTimer::msecsSinceReference() const | |
{ | |
return t1; | |
} | |
qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const | |
{ | |
return other.t1 - t1; | |
} | |
qint64 QElapsedTimer::secsTo(const QElapsedTimer &other) const | |
{ | |
return msecsTo(other) / 1000; | |
} | |
bool operator<(const QElapsedTimer &v1, const QElapsedTimer &v2) | |
{ | |
return (v1.t1 - v2.t1) < 0; | |
} | |
QT_END_NAMESPACE |