Mojo: bindings connector

mojo/public/bindings/lib/message.h

 // Copyright 2013 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_PUBLIC_BINDINGS_LIB_MESSAGE_H_
 #define MOJO_PUBLIC_BINDINGS_LIB_MESSAGE_H_
 
 #include <vector>
 
 #include "mojo/public/system/core.h"
 
 namespace mojo {
 
 #pragma pack(push, 1)
 
 struct MessageHeader {
   uint32_t num_bytes;
   uint32_t name;
 };
 MOJO_COMPILE_ASSERT(sizeof(MessageHeader) == 8, bad_sizeof_MessageHeader);
 
 struct MessageData {
   MessageHeader header;
   uint8_t payload[1];
 };
 MOJO_COMPILE_ASSERT(sizeof(MessageData) == 9, bad_sizeof_MessageData);
 
 #pragma pack(pop)
 
-struct Message {
+class Message {
+ public:
   Message();
   ~Message();
 
+  void Swap(Message* other);
+
   MessageData* data;  // Heap-allocated.
   std::vector<Handle> handles;
+
+ private:
+  MOJO_DISALLOW_COPY_AND_ASSIGN(Message);
 };
 
 class MessageReceiver {
  public:
   // The receiver may mutate the given message or take ownership of its
-  // |message->data| member by setting it to NULL.
+  // |message->data| member by setting it to NULL.  Returns true if the message
+  // was accepted and false otherwise, indicating that the message was invalid
+  // or malformed.
   virtual bool Accept(Message* message) = 0;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_BINDINGS_LIB_MESSAGE_H_