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_POLLSET_HPP_INCLUDED__
31#define __ZMQ_POLLSET_HPP_INCLUDED__
32
33// poller.hpp decides which polling mechanism to use.
34#include "poller.hpp"
35#if defined ZMQ_IOTHREAD_POLLER_USE_POLLSET
36
37#include <sys/poll.h>
38#include <sys/pollset.h>
39#include <vector>
40
41#include "ctx.hpp"
42#include "fd.hpp"
43#include "thread.hpp"
44#include "poller_base.hpp"
45
46namespace zmq
47{
48struct i_poll_events;
49
50// This class implements socket polling mechanism using the AIX-specific
51// pollset mechanism.
52
53class pollset_t : public poller_base_t
54{
55 public:
56 typedef void *handle_t;
57
58 pollset_t (const thread_ctx_t &ctx_);
59 ~pollset_t ();
60
61 // "poller" concept.
62 handle_t add_fd (fd_t fd_, zmq::i_poll_events *events_);
63 void rm_fd (handle_t handle_);
64 void set_pollin (handle_t handle_);
65 void reset_pollin (handle_t handle_);
66 void set_pollout (handle_t handle_);
67 void reset_pollout (handle_t handle_);
68 void start ();
69 void stop ();
70
71 static int max_fds ();
72
73 private:
74 // Main worker thread routine.
75 static void worker_routine (void *arg_);
76
77 // Main event loop.
78 void loop ();
79
80 // Reference to ZMQ context.
81 const thread_ctx_t &ctx;
82
83 // Main pollset file descriptor
84 ::pollset_t pollset_fd;
85
86 struct poll_entry_t
87 {
88 fd_t fd;
89 bool flag_pollin;
90 bool flag_pollout;
91 zmq::i_poll_events *events;
92 };
93
94 // List of retired event sources.
95 typedef std::vector<poll_entry_t *> retired_t;
96 retired_t retired;
97
98 // This table stores data for registered descriptors.
99 typedef std::vector<poll_entry_t *> fd_table_t;
100 fd_table_t fd_table;
101
102 // If true, thread is in the process of shutting down.
103 bool stopping;
104
105 // Handle of the physical thread doing the I/O work.
106 thread_t worker;
107
108 ZMQ_NON_COPYABLE_NOR_MOVABLE (pollset_t)
109};
110
111typedef pollset_t poller_t;
112}
113
114#endif
115
116#endif
117