diff options
Diffstat (limited to 'src/corelib/tools/qelapsedtimer_mac.cpp')
-rw-r--r-- | src/corelib/tools/qelapsedtimer_mac.cpp | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/corelib/tools/qelapsedtimer_mac.cpp b/src/corelib/tools/qelapsedtimer_mac.cpp new file mode 100644 index 0000000..8fceb49 --- /dev/null +++ b/src/corelib/tools/qelapsedtimer_mac.cpp @@ -0,0 +1,126 @@ +/**************************************************************************** +** +** 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 QtCore 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 "qelapsedtimer.h" +#include <sys/time.h> +#include <unistd.h> + +#include <mach/mach_time.h> + +QT_BEGIN_NAMESPACE + +QElapsedTimer::ClockType QElapsedTimer::clockType() +{ + return MachAbsoluteTime; +} + +bool QElapsedTimer::isMonotonic() +{ + 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; +} + +timeval qt_gettime() +{ + timeval tv; + + uint64_t cpu_time = mach_absolute_time(); + uint64_t nsecs = absoluteToNSecs(cpu_time); + tv.tv_sec = nsecs / 1000000000ull; + tv.tv_usec = (nsecs / 1000) - (tv.tv_sec * 1000000); + return tv; +} + +void QElapsedTimer::start() +{ + t1 = mach_absolute_time(); + t2 = 0; +} + +qint64 QElapsedTimer::restart() +{ + qint64 old = t1; + t1 = mach_absolute_time(); + t2 = 0; + + return absoluteToMSecs(t1 - old); +} + +qint64 QElapsedTimer::elapsed() const +{ + uint64_t cpu_time = mach_absolute_time(); + return absoluteToMSecs(cpu_time - t1); +} + +qint64 QElapsedTimer::msecsSinceReference() const +{ + return absoluteToMSecs(t1); +} + +qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const +{ + return absoluteToMSecs(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; +} + +QT_END_NAMESPACE |