Create a broker interface for the new Mojo EDK so that the browser can create and duplicate messa...

mojo/edk/system/token_serializer_messages_win.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_EDK_SYSTEM_TOKEN_SERIALIZER_MESSAGES_WIN_H_
+#define MOJO_EDK_SYSTEM_TOKEN_SERIALIZER_MESSAGES_WIN_H_
+
+#include <stdint.h>
+
+#include "base/compiler_specific.h"
+
+namespace mojo {
+namespace edk {
+
+// This header defines the message format between ChildTokenSerializer and
+// ParentTokenSerializer.
+
+enum MessageId {
+  // The reply is two HANDLEs.
+  CREATE_PLATFORM_CHANNEL_PAIR = 0,
+  // The reply is tokens of the same count of passed in handles.
+  HANDLE_TO_TOKEN,
+  // The reply is handles of the same count of passed in tokens.
+  TOKEN_TO_HANDLE,
+};
+
+// Definitions of the raw bytes sent between ChildTokenSerializer and
+// ParentTokenSerializer.
+
+struct ALIGNAS(4) TokenSerializerMessage {
+  uint32_t size;
+  MessageId id;
+  // Data, if any, follows.
+  union {
+    HANDLE handles[1];  // If HANDLE_TO_TOKEN.
+    uint64_t tokens[1];  // If TOKEN_TO_HANDLE.
+  };
+};
+
+const int kTokenSerializerMessageHeaderSize =
+    sizeof(uint32_t) + sizeof(MessageId);
+
+}  // namespace edk
+}  // namespace mojo
+
+#endif  // MOJO_EDK_SYSTEM_TOKEN_SERIALIZER_MESSAGES_WIN_H_