| // |
| // detail/win_global.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2015 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_WIN_GLOBAL_HPP |
| #define ASIO_DETAIL_WIN_GLOBAL_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include "asio/detail/static_mutex.hpp" |
| #include "asio/detail/tss_ptr.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| template <typename T> |
| struct win_global_impl |
| { |
| // Destructor automatically cleans up the global. |
| ~win_global_impl() |
| { |
| delete ptr_; |
| } |
| |
| static win_global_impl instance_; |
| static static_mutex mutex_; |
| static T* ptr_; |
| static tss_ptr<T> tss_ptr_; |
| }; |
| |
| template <typename T> |
| win_global_impl<T> win_global_impl<T>::instance_ = { 0 }; |
| |
| template <typename T> |
| static_mutex win_global_impl<T>::mutex_ = ASIO_STATIC_MUTEX_INIT; |
| |
| template <typename T> |
| T* win_global_impl<T>::ptr_ = 0; |
| |
| template <typename T> |
| tss_ptr<T> win_global_impl<T>::tss_ptr_; |
| |
| template <typename T> |
| T& win_global() |
| { |
| if (static_cast<T*>(win_global_impl<T>::tss_ptr_) == 0) |
| { |
| win_global_impl<T>::mutex_.init(); |
| static_mutex::scoped_lock lock(win_global_impl<T>::mutex_); |
| win_global_impl<T>::ptr_ = new T; |
| win_global_impl<T>::tss_ptr_ = win_global_impl<T>::ptr_; |
| } |
| |
| return *win_global_impl<T>::tss_ptr_; |
| } |
| |
| } // namespace detail |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_DETAIL_WIN_GLOBAL_HPP |