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//
// posix_fd_set_adapter.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2008 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_POSIX_FD_SET_ADAPTER_HPP
#define BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/push_options.hpp>
#include <boost/asio/detail/push_options.hpp>
#include <cstring>
#include <boost/asio/detail/pop_options.hpp>
#include <boost/asio/detail/socket_types.hpp>
#if !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
namespace boost {
namespace asio {
namespace detail {
// Adapts the FD_SET type to meet the Descriptor_Set concept's requirements.
class posix_fd_set_adapter
{
public:
posix_fd_set_adapter()
: max_descriptor_(invalid_socket)
{
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;
}
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_;
}
private:
mutable fd_set fd_set_;
socket_type max_descriptor_;
};
} // namespace detail
} // namespace asio
} // namespace boost
#endif // !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP
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