diff options
Diffstat (limited to 'src/corelib/tools/qelapsedtimer_win.cpp')
| -rw-r--r-- | src/corelib/tools/qelapsedtimer_win.cpp | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/src/corelib/tools/qelapsedtimer_win.cpp b/src/corelib/tools/qelapsedtimer_win.cpp deleted file mode 100644 index 734aaf80f2..0000000000 --- a/src/corelib/tools/qelapsedtimer_win.cpp +++ /dev/null @@ -1,193 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qelapsedtimer.h" -#include <qt_windows.h> - -typedef ULONGLONG (WINAPI *PtrGetTickCount64)(void); -#if defined(Q_OS_WINRT) - static const PtrGetTickCount64 ptrGetTickCount64 = &GetTickCount64; -#else - static PtrGetTickCount64 ptrGetTickCount64 = 0; -#endif - -QT_BEGIN_NAMESPACE - -// Result of QueryPerformanceFrequency, 0 indicates that the high resolution timer is unavailable -static quint64 counterFrequency = 0; - -static void resolveLibs() -{ - static bool done = false; - if (done) - return; - -#if !defined(Q_OS_WINRT) && !defined(Q_OS_WINCE) - // try to get GetTickCount64 from the system - HMODULE kernel32 = GetModuleHandleW(L"kernel32"); - if (!kernel32) - return; - ptrGetTickCount64 = (PtrGetTickCount64)GetProcAddress(kernel32, "GetTickCount64"); -#endif // !Q_OS_WINRT && !Q_OS_WINCE - - // Retrieve the number of high-resolution performance counter ticks per second - LARGE_INTEGER frequency; - if (!QueryPerformanceFrequency(&frequency)) { - counterFrequency = 0; - } else { - counterFrequency = frequency.QuadPart; - } - - done = true; -} - -static inline qint64 ticksToNanoseconds(qint64 ticks) -{ - if (counterFrequency > 0) { - // QueryPerformanceCounter uses an arbitrary frequency - qint64 seconds = ticks / counterFrequency; - qint64 nanoSeconds = (ticks - seconds * counterFrequency) * 1000000000 / counterFrequency; - return seconds * 1000000000 + nanoSeconds; - } else { - // GetTickCount(64) return milliseconds - return ticks * 1000000; - } -} - -static quint64 getTickCount() -{ - resolveLibs(); - - // This avoids a division by zero and disables the high performance counter if it's not available - if (counterFrequency > 0) { - LARGE_INTEGER counter; - - if (QueryPerformanceCounter(&counter)) { - return counter.QuadPart; - } else { - qWarning("QueryPerformanceCounter failed, although QueryPerformanceFrequency succeeded."); - return 0; - } - } - -#ifndef Q_OS_WINRT - if (ptrGetTickCount64) - return ptrGetTickCount64(); - - static quint32 highdword = 0; - static quint32 lastval = 0; - quint32 val = GetTickCount(); - if (val < lastval) - ++highdword; - lastval = val; - return val | (quint64(highdword) << 32); -#else // !Q_OS_WINRT - // ptrGetTickCount64 is always set on WinRT but GetTickCount is not available - return ptrGetTickCount64(); -#endif // Q_OS_WINRT -} - -quint64 qt_msectime() -{ - return ticksToNanoseconds(getTickCount()) / 1000000; -} - -QElapsedTimer::ClockType QElapsedTimer::clockType() Q_DECL_NOTHROW -{ - resolveLibs(); - - if (counterFrequency > 0) - return PerformanceCounter; - else - return TickCounter; -} - -bool QElapsedTimer::isMonotonic() Q_DECL_NOTHROW -{ - return true; -} - -void QElapsedTimer::start() Q_DECL_NOTHROW -{ - t1 = getTickCount(); - t2 = 0; -} - -qint64 QElapsedTimer::restart() Q_DECL_NOTHROW -{ - qint64 oldt1 = t1; - t1 = getTickCount(); - t2 = 0; - return ticksToNanoseconds(t1 - oldt1) / 1000000; -} - -qint64 QElapsedTimer::nsecsElapsed() const Q_DECL_NOTHROW -{ - qint64 elapsed = getTickCount() - t1; - return ticksToNanoseconds(elapsed); -} - -qint64 QElapsedTimer::elapsed() const Q_DECL_NOTHROW -{ - qint64 elapsed = getTickCount() - t1; - return ticksToNanoseconds(elapsed) / 1000000; -} - -qint64 QElapsedTimer::msecsSinceReference() const Q_DECL_NOTHROW -{ - return ticksToNanoseconds(t1) / 1000000; -} - -qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW -{ - qint64 difference = other.t1 - t1; - return ticksToNanoseconds(difference) / 1000000; -} - -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) < 0; -} - -QT_END_NAMESPACE |