import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

toolkit/components/telemetry/EventInfo.h

@@ -0,0 +1,52 @@
+/* -*-  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 TelemetryEventInfo_h__
+#define TelemetryEventInfo_h__
+
+// This module is internal to Telemetry. The structures here hold data that
+// describe events.
+// It should only be used by TelemetryEventData.h and TelemetryEvent.cpp.
+//
+// For the public interface to Telemetry functionality, see Telemetry.h.
+
+namespace {
+
+struct CommonEventInfo {
+  // Indices for the category and expiration strings.
+  uint32_t category_offset;
+  uint32_t expiration_version_offset;
+
+  // The index and count for the extra key offsets in the extra table.
+  uint32_t extra_index;
+  uint32_t extra_count;
+
+  // The day since UNIX epoch that this probe expires on.
+  uint32_t expiration_day;
+
+  // The dataset this event is recorded in.
+  uint32_t dataset;
+
+  // Convenience functions for accessing event strings.
+  const char* expiration_version() const;
+  const char* category() const;
+  const char* extra_key(uint32_t index) const;
+};
+
+struct EventInfo {
+  // The corresponding CommonEventInfo.
+  const CommonEventInfo& common_info;
+
+  // Indices for the method & object strings.
+  uint32_t method_offset;
+  uint32_t object_offset;
+
+  const char* method() const;
+  const char* object() const;
+};
+
+} // namespace
+
+#endif // TelemetryEventInfo_h__