webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 60 insertions, 0 deletions

diff --git a/Source/ThirdParty/ANGLE/util/osx/OSXTimer.cpp b/Source/ThirdParty/ANGLE/util/osx/OSXTimer.cpp
new file mode 100644
index 000000000..909155d86
--- /dev/null
+++ b/Source/ThirdParty/ANGLE/util/osx/OSXTimer.cpp
@@ -0,0 +1,60 @@
+//
+// Copyright (c) 2015 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.
+//
+
+// OSXTimer.cpp: Implementation of a high precision timer class on OSX
+
+#include "osx/OSXTimer.h"
+
+#include <CoreServices/CoreServices.h>
+#include <mach/mach.h>
+#include <mach/mach_time.h>
+
+OSXTimer::OSXTimer()
+    : mRunning(false)
+{
+}
+
+void OSXTimer::start()
+{
+    mStartTime = mach_absolute_time();
+    mRunning = true;
+}
+
+void OSXTimer::stop()
+{
+    mStopTime = mach_absolute_time();
+    mRunning = false;
+}
+
+double OSXTimer::getElapsedTime() const
+{
+    // If this is the first time we've run, get the timebase.
+    // We can use denom == 0 to indicate that sTimebaseInfo is
+    // uninitialised because it makes no sense to have a zero
+    // denominator in a fraction.
+    static mach_timebase_info_data_t timebaseInfo;
+    static double secondCoeff;
+
+    if ( timebaseInfo.denom == 0 )
+    {
+        mach_timebase_info(&timebaseInfo);
+        secondCoeff = timebaseInfo.numer * (1.0 / 1000000000) / timebaseInfo.denom;
+    }
+
+    if (mRunning)
+    {
+        return secondCoeff * (mach_absolute_time() - mStartTime);
+    }
+    else
+    {
+        return secondCoeff * (mStopTime - mStartTime);
+    }
+}
+
+Timer *CreateTimer()
+{
+    return new OSXTimer();
+}