1 //
2 // detail/null_tss_ptr.hpp
3 // ~~~~~~~~~~~~~~~~~~~~~~~
4 //
5 // Copyright (c) 2003-2015 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_TSS_PTR_HPP
12 #define BOOST_ASIO_DETAIL_NULL_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_THREADS)
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 null_tss_ptr
32   : private noncopyable
33 {
34 public:
35   // Constructor.
null_tss_ptr()36   null_tss_ptr()
37     : value_(0)
38   {
39   }
40 
41   // Destructor.
~null_tss_ptr()42   ~null_tss_ptr()
43   {
44   }
45 
46   // Get the value.
operator T*() const47   operator T*() const
48   {
49     return value_;
50   }
51 
52   // Set the value.
operator =(T * value)53   void operator=(T* value)
54   {
55     value_ = value;
56   }
57 
58 private:
59   T* value_;
60 };
61 
62 } // namespace detail
63 } // namespace asio
64 } // namespace boost
65 
66 #include <boost/asio/detail/pop_options.hpp>
67 
68 #endif // !defined(BOOST_ASIO_HAS_THREADS)
69 
70 #endif // BOOST_ASIO_DETAIL_NULL_TSS_PTR_HPP
71