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