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+/*
+ Copyright (c) 2007-2009 FastMQ Inc.
+
+ This file is part of 0MQ.
+
+ 0MQ is free software; you can redistribute it and/or modify it under
+ the terms of the Lesser GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ 0MQ is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ Lesser GNU General Public License for more details.
+
+ You should have received a copy of the Lesser GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZS_I_DEMUX_HPP_INCLUDED__
+#define __ZS_I_DEMUX_HPP_INCLUDED__
+
+namespace zs
+{
+
+ struct i_demux
+ {
+ // Attaches mux to a particular session.
+ virtual void set_session (class session_t *session_) = 0;
+
+ // To be called when the whole infrastrucure is being closed (zs_term).
+ virtual void shutdown () = 0;
+
+ // To be called when session is being closed.
+ virtual void terminate () = 0;
+
+ // Adds new pipe to the demux to send messages to.
+ virtual void attach_pipe (class pipe_writer_t *pipe_) = 0;
+
+ // Removes pipe from the demux.
+ virtual void detach_pipe (class pipe_writer_t *pipe_) = 0;
+
+ // Returns true if there's no pipe attached.
+ virtual bool empty () = 0;
+
+ // Sends the message. Returns false if the message cannot be sent
+ // because the pipes are full.
+ virtual bool send (struct zs_msg *msg_) = 0;
+
+ // Flushes messages downstream.
+ virtual void flush () = 0;
+ };
+
+}
+
+#endif