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diff --git a/websocketpp/common/connection_hdl.hpp b/websocketpp/common/connection_hdl.hpp
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+/*
+ * Copyright (c) 2014, Peter Thorson. 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 the WebSocket++ Project 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 PETER THORSON 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 WEBSOCKETPP_COMMON_CONNECTION_HDL_HPP
+#define WEBSOCKETPP_COMMON_CONNECTION_HDL_HPP
+
+#include <websocketpp/common/memory.hpp>
+
+namespace websocketpp {
+
+/// A handle to uniquely identify a connection.
+/**
+ * This type uniquely identifies a connection. It is implemented as a weak
+ * pointer to the connection in question. This provides uniqueness across
+ * multiple endpoints and ensures that IDs never conflict or run out.
+ *
+ * It is safe to make copies of this handle, store those copies in containers,
+ * and use them from other threads.
+ *
+ * This handle can be upgraded to a full shared_ptr using
+ * `endpoint::get_con_from_hdl()` from within a handler fired by the connection
+ * that owns the handler.
+ */
+typedef lib::weak_ptr<void> connection_hdl;
+
+} // namespace websocketpp
+
+#endif // WEBSOCKETPP_COMMON_CONNECTION_HDL_HPP