From e49115224a7957b0e5d49326bc02ae6af186eaf9 Mon Sep 17 00:00:00 2001 From: Martin Sustrik Date: Tue, 15 Dec 2009 09:09:19 +0100 Subject: zmq_encoder/decoder are able to add/trim prefixes from messages; fair queueing and load balancing algorithms factorised into separate classes --- src/lb.hpp | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 src/lb.hpp (limited to 'src/lb.hpp') diff --git a/src/lb.hpp b/src/lb.hpp new file mode 100644 index 0000000..21843c3 --- /dev/null +++ b/src/lb.hpp @@ -0,0 +1,63 @@ +/* + 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 . +*/ + +#ifndef __ZMQ_LB_HPP_INCLUDED__ +#define __ZMQ_LB_HPP_INCLUDED__ + +#include "yarray.hpp" + +namespace zmq +{ + + // Class manages a set of outbound pipes. On send it load balances + // messages fairly among the pipes. + class lb_t + { + public: + + lb_t (); + ~lb_t (); + + void attach (class writer_t *pipe_); + void detach (class writer_t *pipe_); + void kill (class writer_t *pipe_); + void revive (class writer_t *pipe_); + int send (zmq_msg_t *msg_, int flags_); + bool has_out (); + + private: + + // List of outbound pipes. + typedef yarray_t 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; + + // Points to the last pipe that the most recent message was sent to. + pipes_t::size_type current; + + lb_t (const lb_t&); + void operator = (const lb_t&); + }; + +} + +#endif -- cgit v1.2.3