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1 //
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2 // detail/null_signal_blocker.hpp
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3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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4 //
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5 // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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6 //
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7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
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8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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9 //
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10
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11 #ifndef BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
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12 #define BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
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13
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14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
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15 # pragma once
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16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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17
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18 #include <boost/asio/detail/config.hpp>
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19
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20 #if !defined(BOOST_ASIO_HAS_THREADS) \
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21 || defined(BOOST_ASIO_WINDOWS) \
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22 || defined(BOOST_ASIO_WINDOWS_RUNTIME) \
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23 || defined(__CYGWIN__) \
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24 || defined(__SYMBIAN32__)
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25
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26 #include <boost/asio/detail/noncopyable.hpp>
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27
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28 #include <boost/asio/detail/push_options.hpp>
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29
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30 namespace boost {
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31 namespace asio {
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32 namespace detail {
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33
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34 class null_signal_blocker
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35 : private noncopyable
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36 {
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37 public:
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38 // Constructor blocks all signals for the calling thread.
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39 null_signal_blocker()
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40 {
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41 }
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42
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43 // Destructor restores the previous signal mask.
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44 ~null_signal_blocker()
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45 {
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46 }
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47
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48 // Block all signals for the calling thread.
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49 void block()
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50 {
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51 }
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52
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53 // Restore the previous signal mask.
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54 void unblock()
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55 {
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56 }
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57 };
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58
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59 } // namespace detail
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60 } // namespace asio
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61 } // namespace boost
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62
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63 #include <boost/asio/detail/pop_options.hpp>
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64
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65 #endif // !defined(BOOST_ASIO_HAS_THREADS)
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66 // || defined(BOOST_ASIO_WINDOWS)
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67 // || defined(BOOST_ASIO_WINDOWS_RUNTIME)
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68 // || defined(__CYGWIN__)
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69 // || defined(__SYMBIAN32__)
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70
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71 #endif // BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
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