1/*
2 Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
3
4 This file is part of libzmq, the ZeroMQ core engine in C++.
5
6 libzmq is free software; you can redistribute it and/or modify it under
7 the terms of the GNU Lesser General Public License (LGPL) as published
8 by the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 As a special exception, the Contributors give you permission to link
12 this library with independent modules to produce an executable,
13 regardless of the license terms of these independent modules, and to
14 copy and distribute the resulting executable under terms of your choice,
15 provided that you also meet, for each linked independent module, the
16 terms and conditions of the license of that module. An independent
17 module is a module which is not derived from or based on this library.
18 If you modify this library, you must extend this exception to your
19 version of the library.
20
21 libzmq is distributed in the hope that it will be useful, but WITHOUT
22 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
23 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
24 License for more details.
25
26 You should have received a copy of the GNU Lesser General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>.
28*/
29
30#ifndef __ZMQ_SERVER_HPP_INCLUDED__
31#define __ZMQ_SERVER_HPP_INCLUDED__
32
33#include <map>
34
35#include "socket_base.hpp"
36#include "session_base.hpp"
37#include "stdint.hpp"
38#include "blob.hpp"
39#include "fq.hpp"
40
41namespace zmq
42{
43class ctx_t;
44class msg_t;
45class pipe_t;
46
47// TODO: This class uses O(n) scheduling. Rewrite it to use O(1) algorithm.
48class server_t : public socket_base_t
49{
50 public:
51 server_t (zmq::ctx_t *parent_, uint32_t tid_, int sid_);
52 ~server_t ();
53
54 // Overrides of functions from socket_base_t.
55 void xattach_pipe (zmq::pipe_t *pipe_,
56 bool subscribe_to_all_,
57 bool locally_initiated_);
58 int xsend (zmq::msg_t *msg_);
59 int xrecv (zmq::msg_t *msg_);
60 bool xhas_in ();
61 bool xhas_out ();
62 void xread_activated (zmq::pipe_t *pipe_);
63 void xwrite_activated (zmq::pipe_t *pipe_);
64 void xpipe_terminated (zmq::pipe_t *pipe_);
65
66 private:
67 // Fair queueing object for inbound pipes.
68 fq_t _fq;
69
70 struct outpipe_t
71 {
72 zmq::pipe_t *pipe;
73 bool active;
74 };
75
76 // Outbound pipes indexed by the peer IDs.
77 typedef std::map<uint32_t, outpipe_t> out_pipes_t;
78 out_pipes_t _out_pipes;
79
80 // Routing IDs are generated. It's a simple increment and wrap-over
81 // algorithm. This value is the next ID to use (if not used already).
82 uint32_t _next_routing_id;
83
84 ZMQ_NON_COPYABLE_NOR_MOVABLE (server_t)
85};
86}
87
88#endif
89