asio/detail/null_signal_blocker.hpp

0001 //
0002 // detail/null_signal_blocker.hpp
0003 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0004 //
0005 // Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0009 //
0010
0011 #ifndef BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
0012 #define BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
0013
0014 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
0015 # pragma once
0016 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
0017
0018 #include <boost/asio/detail/config.hpp>
0019
0020 #if !defined(BOOST_ASIO_HAS_THREADS) \
0021   || defined(BOOST_ASIO_WINDOWS) \
0022   || defined(BOOST_ASIO_WINDOWS_RUNTIME) \
0023   || defined(__CYGWIN__) \
0024   || defined(__SYMBIAN32__)
0025
0026 #include <boost/asio/detail/noncopyable.hpp>
0027
0028 #include <boost/asio/detail/push_options.hpp>
0029
0030 namespace boost {
0031 namespace asio {
0032 namespace detail {
0033
0034 class null_signal_blocker
0035   : private noncopyable
0036 {
0037 public:
0038   // Constructor blocks all signals for the calling thread.
0039   null_signal_blocker()
0040   {
0041   }
0042
0043   // Destructor restores the previous signal mask.
0044   ~null_signal_blocker()
0045   {
0046   }
0047
0048   // Block all signals for the calling thread.
0049   void block()
0050   {
0051   }
0052
0053   // Restore the previous signal mask.
0054   void unblock()
0055   {
0056   }
0057 };
0058
0059 } // namespace detail
0060 } // namespace asio
0061 } // namespace boost
0062
0063 #include <boost/asio/detail/pop_options.hpp>
0064
0065 #endif // !defined(BOOST_ASIO_HAS_THREADS)
0066        // || defined(BOOST_ASIO_WINDOWS)
0067        // || defined(BOOST_ASIO_WINDOWS_RUNTIME)
0068        // || defined(__CYGWIN__)
0069        // || defined(__SYMBIAN32__)
0070
0071 #endif // BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP