| // |
| // detail/win_fd_set_adapter.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #ifndef BOOST_ASIO_DETAIL_WIN_FD_SET_ADAPTER_HPP |
| #define BOOST_ASIO_DETAIL_WIN_FD_SET_ADAPTER_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include <boost/asio/detail/config.hpp> |
| |
| #if defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| |
| #include <boost/asio/detail/socket_types.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| namespace boost { |
| namespace asio { |
| namespace detail { |
| |
| // Adapts the FD_SET type to meet the Descriptor_Set concept's requirements. |
| class win_fd_set_adapter |
| { |
| public: |
| enum { win_fd_set_size = 1024 }; |
| |
| win_fd_set_adapter() |
| : max_descriptor_(invalid_socket) |
| { |
| fd_set_.fd_count = 0; |
| } |
| |
| bool set(socket_type descriptor) |
| { |
| for (u_int i = 0; i < fd_set_.fd_count; ++i) |
| if (fd_set_.fd_array[i] == descriptor) |
| return true; |
| if (fd_set_.fd_count < win_fd_set_size) |
| { |
| fd_set_.fd_array[fd_set_.fd_count++] = descriptor; |
| return true; |
| } |
| return false; |
| } |
| |
| bool is_set(socket_type descriptor) const |
| { |
| return !!__WSAFDIsSet(descriptor, |
| const_cast<fd_set*>(reinterpret_cast<const fd_set*>(&fd_set_))); |
| } |
| |
| operator fd_set*() |
| { |
| return reinterpret_cast<fd_set*>(&fd_set_); |
| } |
| |
| socket_type max_descriptor() const |
| { |
| return max_descriptor_; |
| } |
| |
| private: |
| // This structure is defined to be compatible with the Windows API fd_set |
| // structure, but without being dependent on the value of FD_SETSIZE. |
| struct win_fd_set |
| { |
| u_int fd_count; |
| SOCKET fd_array[win_fd_set_size]; |
| }; |
| |
| win_fd_set fd_set_; |
| socket_type max_descriptor_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) |
| |
| #endif // BOOST_ASIO_DETAIL_WIN_FD_SET_ADAPTER_HPP |