Add binder::Object

Object is the base class of LocalObject and RemoteObject.

LocalObject handles incoming transactions by actually implementing the
behavior.
RemoteObject transacts with an object living in a different process.

BUG=563282

Review URL: https://codereview.chromium.org/1538813002

Cr-Commit-Position: refs/heads/master@{#367790}

1 files changed, 40 insertions, 0 deletions

diff --git a/chromeos/binder/object.h b/chromeos/binder/object.h
new file mode 100644
index 0000000..21b99f0
--- /dev/null
+++ b/chromeos/binder/object.h
@@ -0,0 +1,40 @@
+// 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 CHROMEOS_BINDER_OBJECT_H_
+#define CHROMEOS_BINDER_OBJECT_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace binder {
+
+class CommandBroker;
+class TransactionData;
+
+// An object to perform a transaction.
+class Object : public base::RefCountedThreadSafe<Object> {
+ public:
+  // Type of an object.
+  enum Type {
+    TYPE_LOCAL,   // This object lives in this process.
+    TYPE_REMOTE,  // This object lives in a remote process.
+  };
+
+  // Returns the type of this object.
+  virtual Type GetType() const = 0;
+
+  // Performs a transaction.
+  virtual bool Transact(CommandBroker* command_broker,
+                        const TransactionData& data,
+                        scoped_ptr<TransactionData>* reply) = 0;
+
+ protected:
+  friend class base::RefCountedThreadSafe<Object>;
+  virtual ~Object() {}
+};
+
+}  // namespace binder
+
+#endif  // CHROMEOS_BINDER_OBJECT_H_