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1 | // |
2 | // detail/posix_fd_set_adapter.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
92f5a8d4 | 5 | // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
7c673cae FG |
6 | // |
7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
9 | // | |
10 | ||
11 | #ifndef BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP | |
12 | #define BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP | |
13 | ||
14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) | |
15 | # pragma once | |
16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) | |
17 | ||
18 | #include <boost/asio/detail/config.hpp> | |
19 | ||
20 | #if !defined(BOOST_ASIO_WINDOWS) \ | |
21 | && !defined(__CYGWIN__) \ | |
22 | && !defined(BOOST_ASIO_WINDOWS_RUNTIME) | |
23 | ||
24 | #include <cstring> | |
25 | #include <boost/asio/detail/noncopyable.hpp> | |
26 | #include <boost/asio/detail/reactor_op_queue.hpp> | |
27 | #include <boost/asio/detail/socket_types.hpp> | |
28 | ||
29 | #include <boost/asio/detail/push_options.hpp> | |
30 | ||
31 | namespace boost { | |
32 | namespace asio { | |
33 | namespace detail { | |
34 | ||
35 | // Adapts the FD_SET type to meet the Descriptor_Set concept's requirements. | |
36 | class posix_fd_set_adapter : noncopyable | |
37 | { | |
38 | public: | |
39 | posix_fd_set_adapter() | |
40 | : max_descriptor_(invalid_socket) | |
41 | { | |
42 | using namespace std; // Needed for memset on Solaris. | |
43 | FD_ZERO(&fd_set_); | |
44 | } | |
45 | ||
46 | void reset() | |
47 | { | |
48 | using namespace std; // Needed for memset on Solaris. | |
49 | FD_ZERO(&fd_set_); | |
50 | } | |
51 | ||
52 | bool set(socket_type descriptor) | |
53 | { | |
54 | if (descriptor < (socket_type)FD_SETSIZE) | |
55 | { | |
56 | if (max_descriptor_ == invalid_socket || descriptor > max_descriptor_) | |
57 | max_descriptor_ = descriptor; | |
58 | FD_SET(descriptor, &fd_set_); | |
59 | return true; | |
60 | } | |
61 | return false; | |
62 | } | |
63 | ||
64 | void set(reactor_op_queue<socket_type>& operations, op_queue<operation>& ops) | |
65 | { | |
66 | reactor_op_queue<socket_type>::iterator i = operations.begin(); | |
67 | while (i != operations.end()) | |
68 | { | |
69 | reactor_op_queue<socket_type>::iterator op_iter = i++; | |
70 | if (!set(op_iter->first)) | |
71 | { | |
72 | boost::system::error_code ec(error::fd_set_failure); | |
73 | operations.cancel_operations(op_iter, ops, ec); | |
74 | } | |
75 | } | |
76 | } | |
77 | ||
78 | bool is_set(socket_type descriptor) const | |
79 | { | |
80 | return FD_ISSET(descriptor, &fd_set_) != 0; | |
81 | } | |
82 | ||
83 | operator fd_set*() | |
84 | { | |
85 | return &fd_set_; | |
86 | } | |
87 | ||
88 | socket_type max_descriptor() const | |
89 | { | |
90 | return max_descriptor_; | |
91 | } | |
92 | ||
93 | void perform(reactor_op_queue<socket_type>& operations, | |
94 | op_queue<operation>& ops) const | |
95 | { | |
96 | reactor_op_queue<socket_type>::iterator i = operations.begin(); | |
97 | while (i != operations.end()) | |
98 | { | |
99 | reactor_op_queue<socket_type>::iterator op_iter = i++; | |
100 | if (is_set(op_iter->first)) | |
101 | operations.perform_operations(op_iter, ops); | |
102 | } | |
103 | } | |
104 | ||
105 | private: | |
106 | mutable fd_set fd_set_; | |
107 | socket_type max_descriptor_; | |
108 | }; | |
109 | ||
110 | } // namespace detail | |
111 | } // namespace asio | |
112 | } // namespace boost | |
113 | ||
114 | #include <boost/asio/detail/pop_options.hpp> | |
115 | ||
116 | #endif // !defined(BOOST_ASIO_WINDOWS) | |
117 | // && !defined(__CYGWIN__) | |
118 | // && !defined(BOOST_ASIO_WINDOWS_RUNTIME) | |
119 | ||
120 | #endif // BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP |