diff options
Diffstat (limited to 'src/third_party/boost-1.69.0/boost/asio/detail/win_global.hpp')
-rw-r--r-- | src/third_party/boost-1.69.0/boost/asio/detail/win_global.hpp | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/asio/detail/win_global.hpp b/src/third_party/boost-1.69.0/boost/asio/detail/win_global.hpp new file mode 100644 index 00000000000..11204dec6d2 --- /dev/null +++ b/src/third_party/boost-1.69.0/boost/asio/detail/win_global.hpp @@ -0,0 +1,76 @@ +// +// detail/win_global.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 BOOST_ASIO_DETAIL_WIN_GLOBAL_HPP +#define BOOST_ASIO_DETAIL_WIN_GLOBAL_HPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) + +#include <boost/asio/detail/config.hpp> +#include <boost/asio/detail/static_mutex.hpp> +#include <boost/asio/detail/tss_ptr.hpp> + +#include <boost/asio/detail/push_options.hpp> + +namespace boost { +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_ = BOOST_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_); + if (win_global_impl<T>::ptr_ == 0) + 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 +} // namespace boost + +#include <boost/asio/detail/pop_options.hpp> + +#endif // BOOST_ASIO_DETAIL_WIN_GLOBAL_HPP |