1 files changed, 92 insertions, 0 deletions
diff --git a/src/Runtime/Source/foundation/windows/Qt3DSWindowsTime.cpp b/src/Runtime/Source/foundation/windows/Qt3DSWindowsTime.cpp
new file mode 100644
index 00000000..9215d642
--- /dev/null
+++ b/src/Runtime/Source/foundation/windows/Qt3DSWindowsTime.cpp
@@ -0,0 +1,92 @@
+/****************************************************************************
+**
+** Copyright (C) 2008-2012 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) 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.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-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "foundation/Qt3DSTime.h"
+#include "foundation/windows/Qt3DSWindowsInclude.h"
+
+namespace {
+::qt3ds::QT3DSI64 getTimeTicks()
+{
+    LARGE_INTEGER a;
+    QueryPerformanceCounter(&a);
+    return a.QuadPart;
+}
+
+double getTickDuration()
+{
+    LARGE_INTEGER a;
+    QueryPerformanceFrequency(&a);
+    return 1.0f / double(a.QuadPart);
+}
+
+double sTickDuration = getTickDuration();
+} // namespace
+
+namespace qt3ds {
+namespace foundation {
+
+    const CounterFrequencyToTensOfNanos Time::sCounterFreq = Time::getCounterFrequency();
+
+    CounterFrequencyToTensOfNanos Time::getCounterFrequency()
+    {
+        LARGE_INTEGER freq;
+        QueryPerformanceFrequency(&freq);
+        return CounterFrequencyToTensOfNanos(Time::sNumTensOfNanoSecondsInASecond, freq.QuadPart);
+    }
+
+    QT3DSU64 Time::getCurrentCounterValue()
+    {
+        LARGE_INTEGER ticks;
+        QueryPerformanceCounter(&ticks);
+        return ticks.QuadPart;
+    }
+
+    Time::Time()
+        : mTickCount(0)
+    {
+        getElapsedSeconds();
+    }
+
+    Time::Second Time::getElapsedSeconds()
+    {
+        QT3DSI64 lastTickCount = mTickCount;
+        mTickCount = getTimeTicks();
+        return (mTickCount - lastTickCount) * sTickDuration;
+    }
+
+    Time::Second Time::peekElapsedSeconds()
+    {
+        return (getTimeTicks() - mTickCount) * sTickDuration;
+    }
+
+    Time::Second Time::getLastTime() const { return mTickCount * sTickDuration; }
+
+} // namespace foundation
+} // namespace qt3ds