aboutsummaryrefslogtreecommitdiffstats
path: root/lib/asio/detail/null_signal_blocker.hpp
blob: edfe820519ed5c7d58fde5a558d0dadf418e5bb9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
//
// detail/null_signal_blocker.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2018 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 ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
#define ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include "asio/detail/config.hpp"

#if !defined(ASIO_HAS_THREADS) \
  || defined(ASIO_WINDOWS) \
  || defined(ASIO_WINDOWS_RUNTIME) \
  || defined(__CYGWIN__) \
  || defined(__SYMBIAN32__)

#include "asio/detail/noncopyable.hpp"

#include "asio/detail/push_options.hpp"

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

#include "asio/detail/pop_options.hpp"

#endif // !defined(ASIO_HAS_THREADS)
       // || defined(ASIO_WINDOWS)
       // || defined(ASIO_WINDOWS_RUNTIME)
       // || defined(__CYGWIN__)
       // || defined(__SYMBIAN32__)

#endif // ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP