1 // 2 // detail/posix_fd_set_adapter.hpp 3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4 // 5 // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) 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: posix_fd_set_adapter()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 reset()46 void reset() 47 { 48 using namespace std; // Needed for memset on Solaris. 49 FD_ZERO(&fd_set_); 50 } 51 set(socket_type descriptor)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 set(reactor_op_queue<socket_type> & operations,op_queue<operation> & ops)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 is_set(socket_type descriptor) const78 bool is_set(socket_type descriptor) const 79 { 80 return FD_ISSET(descriptor, &fd_set_) != 0; 81 } 82 operator fd_set*()83 operator fd_set*() 84 { 85 return &fd_set_; 86 } 87 max_descriptor() const88 socket_type max_descriptor() const 89 { 90 return max_descriptor_; 91 } 92 perform(reactor_op_queue<socket_type> & operations,op_queue<operation> & ops) const93 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 121