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+/* -*- 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 FOGIPC_h__
+#define FOGIPC_h__
+
+#include <functional>
+
+#include "mozilla/Maybe.h"
+#include "nsTArrayForwardDeclare.h"
+
+namespace mozilla {
+namespace ipc {
+class ByteBuf;
+} // namespace ipc
+} // namespace mozilla
+
+// This module provides the interface for FOG to communicate between processes.
+
+namespace mozilla {
+namespace glean {
+
+/**
+ * The parent process is asking you to flush your data ASAP.
+ *
+ * @param aResolver - The function you need to call with the bincoded,
+ * serialized payload that the Rust impl hands you.
+ */
+void FlushFOGData(std::function<void(ipc::ByteBuf&&)>&& aResolver);
+
+/**
+ * Called by FOG on the parent process when it wants to flush all its
+ * children's data.
+ * @param aResolver - The function that'll be called with the results.
+ */
+void FlushAllChildData(
+ std::function<void(const nsTArray<ipc::ByteBuf>&&)>&& aResolver);
+
+/**
+ * A child process has sent you this buf as a treat.
+ * @param buf - a bincoded serialized payload that the Rust impl understands.
+ */
+void FOGData(ipc::ByteBuf&& buf);
+
+/**
+ * Called by FOG on a child process when it wants to send a buf to the parent.
+ * @param buf - a bincoded serialized payload that the Rust impl understands.
+ */
+void SendFOGData(ipc::ByteBuf&& buf);
+
+} // namespace glean
+} // namespace mozilla
+
+#endif // FOGIPC_h__