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_DISH_HPP_INCLUDED__
31#define __ZMQ_DISH_HPP_INCLUDED__
32
33#include <string>
34
35#include "socket_base.hpp"
36#include "session_base.hpp"
37#include "dist.hpp"
38#include "fq.hpp"
39#include "msg.hpp"
40
41namespace zmq
42{
43class ctx_t;
44class pipe_t;
45class io_thread_t;
46
47class dish_t : public socket_base_t
48{
49 public:
50 dish_t (zmq::ctx_t *parent_, uint32_t tid_, int sid_);
51 ~dish_t ();
52
53 protected:
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 bool xhas_out ();
60 int xrecv (zmq::msg_t *msg_);
61 bool xhas_in ();
62 void xread_activated (zmq::pipe_t *pipe_);
63 void xwrite_activated (zmq::pipe_t *pipe_);
64 void xhiccuped (pipe_t *pipe_);
65 void xpipe_terminated (zmq::pipe_t *pipe_);
66 int xjoin (const char *group_);
67 int xleave (const char *group_);
68
69 private:
70 int xxrecv (zmq::msg_t *msg_);
71
72 // Send subscriptions to a pipe
73 void send_subscriptions (pipe_t *pipe_);
74
75 // Fair queueing object for inbound pipes.
76 fq_t _fq;
77
78 // Object for distributing the subscriptions upstream.
79 dist_t _dist;
80
81 // The repository of subscriptions.
82 typedef std::set<std::string> subscriptions_t;
83 subscriptions_t _subscriptions;
84
85 // If true, 'message' contains a matching message to return on the
86 // next recv call.
87 bool _has_message;
88 msg_t _message;
89
90 ZMQ_NON_COPYABLE_NOR_MOVABLE (dish_t)
91};
92
93class dish_session_t : public session_base_t
94{
95 public:
96 dish_session_t (zmq::io_thread_t *io_thread_,
97 bool connect_,
98 zmq::socket_base_t *socket_,
99 const options_t &options_,
100 address_t *addr_);
101 ~dish_session_t ();
102
103 // Overrides of the functions from session_base_t.
104 int push_msg (msg_t *msg_);
105 int pull_msg (msg_t *msg_);
106 void reset ();
107
108 private:
109 enum
110 {
111 group,
112 body
113 } _state;
114
115 msg_t _group_msg;
116
117 ZMQ_NON_COPYABLE_NOR_MOVABLE (dish_session_t)
118};
119}
120
121#endif
122