diff options
Diffstat (limited to 'src/corelib/kernel/qelapsedtimer_mac.cpp')
-rw-r--r-- | src/corelib/kernel/qelapsedtimer_mac.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/corelib/kernel/qelapsedtimer_mac.cpp b/src/corelib/kernel/qelapsedtimer_mac.cpp new file mode 100644 index 0000000000..886e0f41b2 --- /dev/null +++ b/src/corelib/kernel/qelapsedtimer_mac.cpp @@ -0,0 +1,149 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.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); +#ifdef __LP64__ + __uint128_t nsecs = static_cast<__uint128_t>(cpuTime) * info.numer / info.denom; + return static_cast<qint64>(nsecs); +#else + qint64 nsecs = cpuTime * info.numer / info.denom; + return nsecs; +#endif +} + +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 |