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diff --git a/include/grpc++/completion_queue.h b/include/grpc++/completion_queue.h
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+/*
+ *
+ * Copyright 2014, 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.
+ *
+ */
+
+#ifndef __GRPCPP_COMPLETION_QUEUE_H__
+#define __GRPCPP_COMPLETION_QUEUE_H__
+
+struct grpc_completion_queue;
+
+namespace grpc {
+
+// grpc_completion_queue wrapper class
+class CompletionQueue {
+ public:
+  CompletionQueue();
+  ~CompletionQueue();
+
+  enum CompletionType {
+    QUEUE_CLOSED = 0,       // Shutting down.
+    RPC_END = 1,            // An RPC finished. Either at client or server.
+    CLIENT_READ_OK = 2,     // A client-side read has finished successfully.
+    CLIENT_READ_ERROR = 3,  // A client-side read has finished with error.
+    CLIENT_WRITE_OK = 4,
+    CLIENT_WRITE_ERROR = 5,
+    SERVER_RPC_NEW = 6,     // A new RPC just arrived at the server.
+    SERVER_READ_OK = 7,     // A server-side read has finished successfully.
+    SERVER_READ_ERROR = 8,  // A server-side read has finished with error.
+    SERVER_WRITE_OK = 9,
+    SERVER_WRITE_ERROR = 10,
+    // Client or server has sent half close successfully.
+    HALFCLOSE_OK = 11,
+    // New CompletionTypes may be added in the future, so user code should
+    // always
+    // handle the default case of a CompletionType that appears after such code
+    // was
+    // written.
+    DO_NOT_USE = 20,
+  };
+
+  // Blocking read from queue.
+  // For QUEUE_CLOSED, *tag is not changed.
+  // For SERVER_RPC_NEW, *tag will be a newly allocated AsyncServerContext.
+  // For others, *tag will be the AsyncServerContext of this rpc.
+  CompletionType Next(void** tag);
+
+  // Shutdown has to be called, and the CompletionQueue can only be
+  // destructed when the QUEUE_CLOSED message has been read with Next().
+  void Shutdown();
+
+  grpc_completion_queue* cq() { return cq_; }
+
+ private:
+  grpc_completion_queue* cq_;  // owned
+};
+
+}  // namespace grpc
+
+#endif  // __GRPCPP_COMPLETION_QUEUE_H__