// // detail/null_signal_blocker.hpp // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2014 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_NULL_SIGNAL_BLOCKER_HPP #define BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_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_ASIO_HAS_THREADS) \ || defined(BOOST_ASIO_WINDOWS) \ || defined(BOOST_ASIO_WINDOWS_RUNTIME) \ || defined(__CYGWIN__) \ || defined(__SYMBIAN32__) #include <boost/asio/detail/noncopyable.hpp> #include <boost/asio/detail/push_options.hpp> namespace boost { namespace asio { namespace detail { class null_signal_blocker : private noncopyable { public: // Constructor blocks all signals for the calling thread. null_signal_blocker() { } // Destructor restores the previous signal mask. ~null_signal_blocker() { } // Block all signals for the calling thread. void block() { } // Restore the previous signal mask. void unblock() { } }; } // namespace detail } // namespace asio } // namespace boost #include <boost/asio/detail/pop_options.hpp> #endif // !defined(BOOST_ASIO_HAS_THREADS) // || defined(BOOST_ASIO_WINDOWS) // || defined(BOOST_ASIO_WINDOWS_RUNTIME) // || defined(__CYGWIN__) // || defined(__SYMBIAN32__) #endif // BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP