// // detail/win_tss_ptr.hpp // ~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2011 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_TSS_PTR_HPP #define BOOST_ASIO_DETAIL_WIN_TSS_PTR_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include <boost/asio/detail/config.hpp> #if defined(BOOST_WINDOWS) #include <boost/asio/detail/noncopyable.hpp> #include <boost/asio/detail/socket_types.hpp> #include <boost/asio/detail/push_options.hpp> namespace boost { namespace asio { namespace detail { // Helper function to create thread-specific storage. BOOST_ASIO_DECL DWORD win_tss_ptr_create(); template <typename T> class win_tss_ptr : private noncopyable { public: // Constructor. win_tss_ptr() : tss_key_(win_tss_ptr_create()) { } // Destructor. ~win_tss_ptr() { ::TlsFree(tss_key_); } // Get the value. operator T*() const { return static_cast<T*>(::TlsGetValue(tss_key_)); } // Set the value. void operator=(T* value) { ::TlsSetValue(tss_key_, value); } private: // Thread-specific storage to allow unlocked access to determine whether a // thread is a member of the pool. DWORD tss_key_; }; } // namespace detail } // namespace asio } // namespace boost #include <boost/asio/detail/pop_options.hpp> #if defined(BOOST_ASIO_HEADER_ONLY) # include <boost/asio/detail/impl/win_tss_ptr.ipp> #endif // defined(BOOST_ASIO_HEADER_ONLY) #endif // defined(BOOST_WINDOWS) #endif // BOOST_ASIO_DETAIL_WIN_TSS_PTR_HPP