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-rw-r--r--tools/profiler/gecko/ProfilerIOInterposeObserver.h32
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diff --git a/tools/profiler/gecko/ProfilerIOInterposeObserver.h b/tools/profiler/gecko/ProfilerIOInterposeObserver.h
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef PROFILERIOINTERPOSEOBSERVER_H
+#define PROFILERIOINTERPOSEOBSERVER_H
+
+#include "mozilla/IOInterposer.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+
+/**
+ * This class is the observer that calls into the profiler whenever
+ * main thread I/O occurs.
+ */
+class ProfilerIOInterposeObserver final : public IOInterposeObserver {
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ProfilerIOInterposeObserver)
+
+ public:
+ static ProfilerIOInterposeObserver& GetInstance();
+
+ virtual void Observe(Observation& aObservation) override;
+
+ private:
+ ProfilerIOInterposeObserver() = default;
+ virtual ~ProfilerIOInterposeObserver() {}
+};
+
+} // namespace mozilla
+
+#endif // PROFILERIOINTERPOSEOBSERVER_H