| // |
| // detail/posix_fd_set_adapter.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2016 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 ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP |
| #define ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| |
| #if !defined(ASIO_WINDOWS) \ |
| && !defined(__CYGWIN__) \ |
| && !defined(ASIO_WINDOWS_RUNTIME) |
| |
| #include <cstring> |
| #include "asio/detail/noncopyable.hpp" |
| #include "asio/detail/reactor_op_queue.hpp" |
| #include "asio/detail/socket_types.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| // Adapts the FD_SET type to meet the Descriptor_Set concept's requirements. |
| class posix_fd_set_adapter : noncopyable |
| { |
| public: |
| posix_fd_set_adapter() |
| : max_descriptor_(invalid_socket) |
| { |
| using namespace std; // Needed for memset on Solaris. |
| FD_ZERO(&fd_set_); |
| } |
| |
| void reset() |
| { |
| using namespace std; // Needed for memset on Solaris. |
| FD_ZERO(&fd_set_); |
| } |
| |
| bool set(socket_type descriptor) |
| { |
| if (descriptor < (socket_type)FD_SETSIZE) |
| { |
| if (max_descriptor_ == invalid_socket || descriptor > max_descriptor_) |
| max_descriptor_ = descriptor; |
| FD_SET(descriptor, &fd_set_); |
| return true; |
| } |
| return false; |
| } |
| |
| void set(reactor_op_queue<socket_type>& operations, op_queue<operation>& ops) |
| { |
| reactor_op_queue<socket_type>::iterator i = operations.begin(); |
| while (i != operations.end()) |
| { |
| reactor_op_queue<socket_type>::iterator op_iter = i++; |
| if (!set(op_iter->first)) |
| { |
| asio::error_code ec(error::fd_set_failure); |
| operations.cancel_operations(op_iter, ops, ec); |
| } |
| } |
| } |
| |
| bool is_set(socket_type descriptor) const |
| { |
| return FD_ISSET(descriptor, &fd_set_) != 0; |
| } |
| |
| operator fd_set*() |
| { |
| return &fd_set_; |
| } |
| |
| socket_type max_descriptor() const |
| { |
| return max_descriptor_; |
| } |
| |
| void perform(reactor_op_queue<socket_type>& operations, |
| op_queue<operation>& ops) const |
| { |
| reactor_op_queue<socket_type>::iterator i = operations.begin(); |
| while (i != operations.end()) |
| { |
| reactor_op_queue<socket_type>::iterator op_iter = i++; |
| if (is_set(op_iter->first)) |
| operations.perform_operations(op_iter, ops); |
| } |
| } |
| |
| private: |
| mutable fd_set fd_set_; |
| socket_type max_descriptor_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // !defined(ASIO_WINDOWS) |
| // && !defined(__CYGWIN__) |
| // && !defined(ASIO_WINDOWS_RUNTIME) |
| |
| #endif // ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP |