1 files changed, 43 insertions, 0 deletions
diff --git a/src/i_engine.hpp b/src/i_engine.hpp
new file mode 100644
index 0000000..c21556f
--- /dev/null
+++ b/src/i_engine.hpp
@@ -0,0 +1,43 @@
+/*
+    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 __ZMQ_I_ENGINE_HPP_INCLUDED__
+#define __ZMQ_I_ENGINE_HPP_INCLUDED__
+
+namespace zmq
+{
+
+    struct i_engine
+    {
+        virtual ~i_engine () {}
+
+        //  Plug the engine to the session.
+        virtual void plug (struct i_inout *inout_) = 0;
+
+        //  Unplug the engine from the session.
+        virtual void unplug () = 0;
+
+        //  This method is called by the session to signalise that there
+        //  are messages to send available.
+        virtual void revive () = 0;
+    };
+
+}
+
+#endif