1 files changed, 57 insertions, 0 deletions
diff --git a/Source/ThirdParty/ANGLE/util/windows/WindowsTimer.cpp b/Source/ThirdParty/ANGLE/util/windows/WindowsTimer.cpp
new file mode 100644
index 000000000..c6a9e9dd8
--- /dev/null
+++ b/Source/ThirdParty/ANGLE/util/windows/WindowsTimer.cpp
@@ -0,0 +1,57 @@
+//
+// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// WindowsTimer.cpp: Implementation of a high precision timer class on Windows
+
+#include "windows/WindowsTimer.h"
+
+WindowsTimer::WindowsTimer() : mRunning(false), mStartTime(0), mStopTime(0)
+{
+}
+
+void WindowsTimer::start()
+{
+    LARGE_INTEGER frequency;
+    QueryPerformanceFrequency(&frequency);
+    mFrequency = frequency.QuadPart;
+
+    LARGE_INTEGER curTime;
+    QueryPerformanceCounter(&curTime);
+    mStartTime = curTime.QuadPart;
+
+    mRunning = true;
+}
+
+void WindowsTimer::stop()
+{
+    LARGE_INTEGER curTime;
+    QueryPerformanceCounter(&curTime);
+    mStopTime = curTime.QuadPart;
+
+    mRunning = false;
+}
+
+double WindowsTimer::getElapsedTime() const
+{
+    LONGLONG endTime;
+    if (mRunning)
+    {
+        LARGE_INTEGER curTime;
+        QueryPerformanceCounter(&curTime);
+        endTime = curTime.QuadPart;
+    }
+    else
+    {
+        endTime = mStopTime;
+    }
+
+    return static_cast<double>(endTime - mStartTime) / mFrequency;
+}
+
+Timer *CreateTimer()
+{
+    return new WindowsTimer();
+}