C++ bindings

mojo/public/bindings/lib/message_builder.h

Index: mojo/public/bindings/lib/message_builder.h
diff --git a/mojo/public/bindings/lib/message_builder.h b/mojo/public/bindings/lib/message_builder.h
new file mode 100644
index 0000000000000000000000000000000000000000..49ece956d1e0506dbac548f243b3cf1c91cb1ee8
--- /dev/null
+++ b/mojo/public/bindings/lib/message_builder.h
@@ -0,0 +1,34 @@
+// 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_BUILDER_H_
+#define MOJO_PUBLIC_BINDINGS_LIB_MESSAGE_BUILDER_H_
+
+#include <stdint.h>
+
+#include "mojo/public/bindings/lib/buffer.h"
+
+namespace mojo {
+struct MessageData;
+
+// Used to construct a MessageData object.
+class MessageBuilder {
+ public:
+  MessageBuilder(uint32_t message_name, size_t payload_size);
+  ~MessageBuilder();
+
+  Buffer* buffer() { return &buf_; }
+
+  // Call Finish when done making allocations in |buffer()|. A heap-allocated
+  // MessageData object will be returned. When no longer needed, use |free()|
+  // to release the MessageData object's memory.
+  MessageData* Finish();
+
+ private:
+  FixedBuffer buf_;
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_BINDINGS_LIB_MESSAGE_BUILDER_H_