Chris@16: //
Chris@16: // detail/posix_fd_set_adapter.hpp
Chris@16: // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Chris@16: //
Chris@101: // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: 
Chris@16: #ifndef BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP
Chris@16: #define BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP
Chris@16: 
Chris@16: #if defined(_MSC_VER) && (_MSC_VER >= 1200)
Chris@16: # pragma once
Chris@16: #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
Chris@16: 
Chris@16: #include <boost/asio/detail/config.hpp>
Chris@16: 
Chris@16: #if !defined(BOOST_ASIO_WINDOWS) \
Chris@16:   && !defined(__CYGWIN__) \
Chris@16:   && !defined(BOOST_ASIO_WINDOWS_RUNTIME)
Chris@16: 
Chris@16: #include <cstring>
Chris@16: #include <boost/asio/detail/noncopyable.hpp>
Chris@101: #include <boost/asio/detail/reactor_op_queue.hpp>
Chris@16: #include <boost/asio/detail/socket_types.hpp>
Chris@16: 
Chris@16: #include <boost/asio/detail/push_options.hpp>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace asio {
Chris@16: namespace detail {
Chris@16: 
Chris@16: // Adapts the FD_SET type to meet the Descriptor_Set concept's requirements.
Chris@16: class posix_fd_set_adapter : noncopyable
Chris@16: {
Chris@16: public:
Chris@16:   posix_fd_set_adapter()
Chris@16:     : max_descriptor_(invalid_socket)
Chris@16:   {
Chris@16:     using namespace std; // Needed for memset on Solaris.
Chris@16:     FD_ZERO(&fd_set_);
Chris@16:   }
Chris@16: 
Chris@16:   void reset()
Chris@16:   {
Chris@16:     using namespace std; // Needed for memset on Solaris.
Chris@16:     FD_ZERO(&fd_set_);
Chris@16:   }
Chris@16: 
Chris@16:   bool set(socket_type descriptor)
Chris@16:   {
Chris@16:     if (descriptor < (socket_type)FD_SETSIZE)
Chris@16:     {
Chris@16:       if (max_descriptor_ == invalid_socket || descriptor > max_descriptor_)
Chris@16:         max_descriptor_ = descriptor;
Chris@16:       FD_SET(descriptor, &fd_set_);
Chris@16:       return true;
Chris@16:     }
Chris@16:     return false;
Chris@16:   }
Chris@16: 
Chris@101:   void set(reactor_op_queue<socket_type>& operations, op_queue<operation>& ops)
Chris@101:   {
Chris@101:     reactor_op_queue<socket_type>::iterator i = operations.begin();
Chris@101:     while (i != operations.end())
Chris@101:     {
Chris@101:       reactor_op_queue<socket_type>::iterator op_iter = i++;
Chris@101:       if (!set(op_iter->first))
Chris@101:       {
Chris@101:         boost::system::error_code ec(error::fd_set_failure);
Chris@101:         operations.cancel_operations(op_iter, ops, ec);
Chris@101:       }
Chris@101:     }
Chris@101:   }
Chris@101: 
Chris@16:   bool is_set(socket_type descriptor) const
Chris@16:   {
Chris@16:     return FD_ISSET(descriptor, &fd_set_) != 0;
Chris@16:   }
Chris@16: 
Chris@16:   operator fd_set*()
Chris@16:   {
Chris@16:     return &fd_set_;
Chris@16:   }
Chris@16: 
Chris@16:   socket_type max_descriptor() const
Chris@16:   {
Chris@16:     return max_descriptor_;
Chris@16:   }
Chris@16: 
Chris@101:   void perform(reactor_op_queue<socket_type>& operations,
Chris@101:       op_queue<operation>& ops) const
Chris@101:   {
Chris@101:     reactor_op_queue<socket_type>::iterator i = operations.begin();
Chris@101:     while (i != operations.end())
Chris@101:     {
Chris@101:       reactor_op_queue<socket_type>::iterator op_iter = i++;
Chris@101:       if (is_set(op_iter->first))
Chris@101:         operations.perform_operations(op_iter, ops);
Chris@101:     }
Chris@101:   }
Chris@101: 
Chris@16: private:
Chris@16:   mutable fd_set fd_set_;
Chris@16:   socket_type max_descriptor_;
Chris@16: };
Chris@16: 
Chris@16: } // namespace detail
Chris@16: } // namespace asio
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #include <boost/asio/detail/pop_options.hpp>
Chris@16: 
Chris@16: #endif // !defined(BOOST_ASIO_WINDOWS)
Chris@16:        // && !defined(__CYGWIN__)
Chris@16:        // && !defined(BOOST_ASIO_WINDOWS_RUNTIME)
Chris@16: 
Chris@16: #endif // BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP