// | |
// detail/win_fd_set_adapter.hpp | |
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
// | |
// Copyright (c) 2003-2011 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 |