ceph/src/boost/boost/asio/detail/null_signal_blocker.hpp

   1 //
   2 // detail/null_signal_blocker.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
  12 #define BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19
  20 #if !defined(BOOST_ASIO_HAS_THREADS) \
  21   || defined(BOOST_ASIO_WINDOWS) \
  22   || defined(BOOST_ASIO_WINDOWS_RUNTIME) \
  23   || defined(__CYGWIN__) \
  24   || defined(__SYMBIAN32__)
  25
  26 #include <boost/asio/detail/noncopyable.hpp>
  27
  28 #include <boost/asio/detail/push_options.hpp>
  29
  30 namespace boost {
  31 namespace asio {
  32 namespace detail {
  33
  34 class null_signal_blocker
  35   : private noncopyable
  36 {
  37 public:
  38   // Constructor blocks all signals for the calling thread.
  39   null_signal_blocker()
  40   {
  41   }
  42
  43   // Destructor restores the previous signal mask.
  44   ~null_signal_blocker()
  45   {
  46   }
  47
  48   // Block all signals for the calling thread.
  49   void block()
  50   {
  51   }
  52
  53   // Restore the previous signal mask.
  54   void unblock()
  55   {
  56   }
  57 };
  58
  59 } // namespace detail
  60 } // namespace asio
  61 } // namespace boost
  62
  63 #include <boost/asio/detail/pop_options.hpp>
  64
  65 #endif // !defined(BOOST_ASIO_HAS_THREADS)
  66        // || defined(BOOST_ASIO_WINDOWS)
  67        // || defined(BOOST_ASIO_WINDOWS_RUNTIME)
  68        // || defined(__CYGWIN__)
  69        // || defined(__SYMBIAN32__)
  70
  71 #endif // BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP