Mojo: RemotePtr<S> + bindings changes for Peer attribute.

mojo/public/bindings/lib/remote_ptr.h

Index: mojo/public/bindings/lib/remote_ptr.h
diff --git a/mojo/public/bindings/lib/remote_ptr.h b/mojo/public/bindings/lib/remote_ptr.h
new file mode 100644
index 0000000000000000000000000000000000000000..2905992fbb3bad9440e8b3b94c0967200bf40dfc
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+++ b/mojo/public/bindings/lib/remote_ptr.h
@@ -0,0 +1,77 @@
+// 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_REMOTE_PTR_H_
+#define MOJO_PUBLIC_BINDINGS_LIB_REMOTE_PTR_H_
+
+#include "mojo/public/bindings/lib/connector.h"
+
+namespace mojo {
+
+// A RemotePtr is a smart-pointer for managing the connection of a message pipe
+// to an interface proxy.
+//
+// EXAMPLE
+//
+// On the client side of a service, RemotePtr might be used like so:
+//
+//   class FooClientImpl : public FooClientStub {
+//    public:
+//     explicit FooClientImpl(mojo::Handle message_pipe)
+//         : foo_(message_pipe) {
+//       foo_.SetPeer(this);
+//       foo_.Ping();
+//     }
+//     virtual void Pong() {
+//       ...
+//     }
+//    private:
+//     mojo::RemotePtr<Foo> foo_;
+//   };
+//
+// On the implementation side of a service, RemotePtr might be used like so:
+//
+//   class FooImpl : public FooStub {
+//    public:
+//     explicit FooImpl(mojo::Handle message_pipe)
+//         : client_(message_pipe) {
+//       client_.SetPeer(this);
+//     }
+//     virtual void Ping() {
+//       client_->Pong();
+//     }
+//    private:
+//     mojo::RemotePtr<FooClient> client_;
+//   };
+//
+template <typename S>
+class RemotePtr {
+ public:
+  explicit RemotePtr(Handle message_pipe)
+      : connector_(message_pipe),
+        proxy_(&connector_) {
+  }
+
+  S* get() {
+    return &proxy_;
+  }
+
+  S* operator->() {
+    return get();
+  }
+
+  void SetPeer(typename S::_Peer::_Stub* peer) {
+    connector_.SetIncomingReceiver(peer);
+  }
+
+ private:
+  Connector connector_;
+  typename S::_Proxy proxy_;
+
+  MOJO_DISALLOW_COPY_AND_ASSIGN(RemotePtr);
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_BINDINGS_LIB_REMOTE_PTR_H_