Initial ZMQ bindings.

vendor/ZMQ/src/fq.hpp

@@ -0,0 +1,84 @@
+/*
+    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq 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_FQ_HPP_INCLUDED__
+#define __ZMQ_FQ_HPP_INCLUDED__
+
+#include "array.hpp"
+#include "blob.hpp"
+
+namespace zmq
+{
+class msg_t;
+class pipe_t;
+
+//  Class manages a set of inbound pipes. On receive it performs fair
+//  queueing so that senders gone berserk won't cause denial of
+//  service for decent senders.
+
+class fq_t
+{
+  public:
+    fq_t ();
+    ~fq_t ();
+
+    void attach (pipe_t *pipe_);
+    void activated (pipe_t *pipe_);
+    void pipe_terminated (pipe_t *pipe_);
+
+    int recv (msg_t *msg_);
+    int recvpipe (msg_t *msg_, pipe_t **pipe_);
+    bool has_in ();
+
+  private:
+    //  Inbound pipes.
+    typedef array_t<pipe_t, 1> pipes_t;
+    pipes_t _pipes;
+
+    //  Number of active pipes. All the active pipes are located at the
+    //  beginning of the pipes array.
+    pipes_t::size_type _active;
+
+    //  Pointer to the last pipe we received message from.
+    //  NULL when no message has been received or the pipe
+    //  has terminated.
+    pipe_t *_last_in;
+
+    //  Index of the next bound pipe to read a message from.
+    pipes_t::size_type _current;
+
+    //  If true, part of a multipart message was already received, but
+    //  there are following parts still waiting in the current pipe.
+    bool _more;
+
+    ZMQ_NON_COPYABLE_NOR_MOVABLE (fq_t)
+};
+}
+
+#endif