1 //
2 // detail/keyword_tss_ptr.hpp
3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~
4 //
5 // Copyright (c) 2003-2021 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_KEYWORD_TSS_PTR_HPP
12 #define BOOST_ASIO_DETAIL_KEYWORD_TSS_PTR_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_THREAD_KEYWORD_EXTENSION)
21 
22 #include <boost/asio/detail/noncopyable.hpp>
23 
24 #include <boost/asio/detail/push_options.hpp>
25 
26 namespace boost {
27 namespace asio {
28 namespace detail {
29 
30 template <typename T>
31 class keyword_tss_ptr
32   : private noncopyable
33 {
34 public:
35   // Constructor.
keyword_tss_ptr()36   keyword_tss_ptr()
37   {
38   }
39 
40   // Destructor.
~keyword_tss_ptr()41   ~keyword_tss_ptr()
42   {
43   }
44 
45   // Get the value.
operator T*() const46   operator T*() const
47   {
48     return value_;
49   }
50 
51   // Set the value.
operator =(T * value)52   void operator=(T* value)
53   {
54     value_ = value;
55   }
56 
57 private:
58   static BOOST_ASIO_THREAD_KEYWORD T* value_;
59 };
60 
61 template <typename T>
62 BOOST_ASIO_THREAD_KEYWORD T* keyword_tss_ptr<T>::value_;
63 
64 } // namespace detail
65 } // namespace asio
66 } // namespace boost
67 
68 #include <boost/asio/detail/pop_options.hpp>
69 
70 #endif // defined(BOOST_ASIO_HAS_THREAD_KEYWORD_EXTENSION)
71 
72 #endif // BOOST_ASIO_DETAIL_KEYWORD_TSS_PTR_HPP
73