Bug 1302663 - Part 2 - Implement Event Telemetry recording. r=froydnj,dexter

This implements the API, storage and serialization for Telemetry event recording.

toolkit/components/telemetry/TelemetryEvent.h

@@ -0,0 +1,39 @@
+/* -*-  Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
+/* 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 TelemetryEvent_h__
+#define TelemetryEvent_h__
+
+#include "mozilla/TelemetryEventEnums.h"
+
+// This module is internal to Telemetry. It encapsulates Telemetry's
+// event recording and storage logic. It should only be used by
+// Telemetry.cpp. These functions should not be used anywhere else.
+// For the public interface to Telemetry functionality, see Telemetry.h.
+
+namespace TelemetryEvent {
+
+void InitializeGlobalState(bool canRecordBase, bool canRecordExtended);
+void DeInitializeGlobalState();
+
+void SetCanRecordBase(bool b);
+void SetCanRecordExtended(bool b);
+
+// JS API Endpoints.
+nsresult RecordEvent(const nsACString& aCategory, const nsACString& aMethod,
+                     const nsACString& aObject, JS::HandleValue aValue,
+                     JS::HandleValue aExtra, JSContext* aCx,
+                     uint8_t optional_argc);
+nsresult CreateSnapshots(uint32_t aDataset, bool aClear, JSContext* aCx,
+                         uint8_t optional_argc, JS::MutableHandleValue aResult);
+
+// Only to be used for testing.
+void ClearEvents();
+
+size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
+
+} // namespace TelemetryEvent
+
+#endif // TelemetryEvent_h__