1 files changed, 48 insertions, 0 deletions
diff --git a/Source/WebCore/platform/CPUTime.cpp b/Source/WebCore/platform/CPUTime.cpp
new file mode 100644
index 000000000..226440974
--- /dev/null
+++ b/Source/WebCore/platform/CPUTime.cpp
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+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "CPUTime.h"
+
+namespace WebCore {
+
+#if !PLATFORM(COCOA)
+
+std::optional<CPUTime> getCPUTime()
+{
+    return std::nullopt;
+}
+
+#endif
+
+double CPUTime::percentageCPUUsageSince(const CPUTime& reference)
+{
+    int64_t cpuUsageTimeDelta = (systemTime + userTime) - (reference.systemTime + reference.userTime);
+    int64_t cpuTimeDelta = cpuTime - reference.cpuTime;
+    ASSERT(cpuTimeDelta);
+    return static_cast<double>(cpuUsageTimeDelta * 100.0) / cpuTimeDelta;
+}
+
+}