thread safety

src/i_mailbox.hpp

@@ -0,0 +1,50 @@
+/*
+    Copyright (c) 2007-2015 Contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser 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
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_I_MAILBOX_HPP_INCLUDED__
+#define __ZMQ_I_MAILBOX_HPP_INCLUDED__
+
+#include "stdint.hpp"
+
+namespace zmq
+{
+    //  Interface to be implemented by mailbox.
+
+    class i_mailbox
+    {
+    public:
+        virtual ~i_mailbox () {}
+
+        virtual void send (const command_t &cmd_) = 0;
+        virtual int recv (command_t *cmd_, int timeout_) = 0;
+
+
+#ifdef HAVE_FORK
+        // close the file descriptors in the signaller. This is used in a forked
+        // child process to close the file descriptors so that they do not interfere
+        // with the context in the parent process.
+        virtual void forked () = 0;
+#endif
+
+
+    };
+
+}
+
+#endif