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diff --git a/o3d/command_buffer/client/cross/buffer_sync_proxy.h b/o3d/command_buffer/client/cross/buffer_sync_proxy.h
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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+// This file defines the RPC glue for the Command Buffer Synchronous API,
+// client side: a proxy implementation of BufferSyncInterface, forwarding calls
+// to a RPC send interface.
+
+#ifndef O3D_COMMAND_BUFFER_CLIENT_CROSS_BUFFER_SYNC_PROXY_H_
+#define O3D_COMMAND_BUFFER_CLIENT_CROSS_BUFFER_SYNC_PROXY_H_
+
+#include "command_buffer/common/cross/rpc.h"
+#include "command_buffer/common/cross/buffer_sync_api.h"
+
+namespace o3d {
+namespace command_buffer {
+
+// Class implementing the Command Buffer Synchronous API, forwarding all the
+// calls to a RPC server, according to the (trivial) protocol defined in
+// BufferRPCImpl.
+class BufferSyncProxy : public BufferSyncInterface {
+ public:
+  explicit BufferSyncProxy(RPCSendInterface *server) : server_(server) {}
+  virtual ~BufferSyncProxy() {}
+
+  // Implements the InitConnection call, forwarding it to the RPC server.
+  virtual void InitConnection();
+
+  // Implements the CloseConnection call, forwarding it to the RPC server.
+  virtual void CloseConnection();
+
+  // Implements the RegisterSharedMemory call, forwarding it to the RPC server.
+  virtual unsigned int RegisterSharedMemory(RPCShmHandle buffer, size_t size);
+
+  // Implements the UnregisterSharedMemory call, forwarding it to the RPC
+  // server.
+  virtual void UnregisterSharedMemory(unsigned int shm_id);
+
+  // Implements the SetCommandBuffer call, forwarding it to the RPC server.
+  virtual void SetCommandBuffer(unsigned int shm_id,
+                                ptrdiff_t offset,
+                                size_t size,
+                                CommandBufferOffset start_get);
+
+  // Implements the Put call, forwarding it to the RPC server.
+  virtual void Put(CommandBufferOffset offset);
+
+  // Implements the Get call, forwarding it to the RPC server.
+  virtual CommandBufferOffset Get();
+
+  // Implements the GetToken call, forwarding it to the RPC server.
+  virtual unsigned int GetToken();
+
+  // Implements the WaitGetChanges call, forwarding it to the RPC server.
+  virtual CommandBufferOffset WaitGetChanges(
+      CommandBufferOffset current_value);
+
+  // Implements the SignalGetChanges call, forwarding it to the RPC server.
+  virtual void SignalGetChanges(CommandBufferOffset current_value,
+                                int rpc_message_id);
+
+  // Implements the GetStatus call, forwarding it to the RPC server.
+  virtual ParserStatus GetStatus();
+
+  // Implements the GetParseError call, forwarding it to the RPC server.
+  virtual ParseError GetParseError();
+ private:
+  RPCSendInterface *server_;
+};
+
+}  // namespace command_buffer
+}  // namespace o3d
+
+#endif  // O3D_COMMAND_BUFFER_CLIENT_CROSS_BUFFER_SYNC_PROXY_H_