Chris@16: //
Chris@16: // detail/win_tss_ptr.hpp
Chris@16: // ~~~~~~~~~~~~~~~~~~~~~~
Chris@16: //
Chris@101: // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: 
Chris@16: #ifndef BOOST_ASIO_DETAIL_WIN_TSS_PTR_HPP
Chris@16: #define BOOST_ASIO_DETAIL_WIN_TSS_PTR_HPP
Chris@16: 
Chris@16: #if defined(_MSC_VER) && (_MSC_VER >= 1200)
Chris@16: # pragma once
Chris@16: #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
Chris@16: 
Chris@16: #include <boost/asio/detail/config.hpp>
Chris@16: 
Chris@16: #if defined(BOOST_ASIO_WINDOWS)
Chris@16: 
Chris@16: #include <boost/asio/detail/noncopyable.hpp>
Chris@16: #include <boost/asio/detail/socket_types.hpp>
Chris@16: 
Chris@16: #include <boost/asio/detail/push_options.hpp>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace asio {
Chris@16: namespace detail {
Chris@16: 
Chris@16: // Helper function to create thread-specific storage.
Chris@16: BOOST_ASIO_DECL DWORD win_tss_ptr_create();
Chris@16: 
Chris@16: template <typename T>
Chris@16: class win_tss_ptr
Chris@16:   : private noncopyable
Chris@16: {
Chris@16: public:
Chris@16:   // Constructor.
Chris@16:   win_tss_ptr()
Chris@16:     : tss_key_(win_tss_ptr_create())
Chris@16:   {
Chris@16:   }
Chris@16: 
Chris@16:   // Destructor.
Chris@16:   ~win_tss_ptr()
Chris@16:   {
Chris@16:     ::TlsFree(tss_key_);
Chris@16:   }
Chris@16: 
Chris@16:   // Get the value.
Chris@16:   operator T*() const
Chris@16:   {
Chris@16:     return static_cast<T*>(::TlsGetValue(tss_key_));
Chris@16:   }
Chris@16: 
Chris@16:   // Set the value.
Chris@16:   void operator=(T* value)
Chris@16:   {
Chris@16:     ::TlsSetValue(tss_key_, value);
Chris@16:   }
Chris@16: 
Chris@16: private:
Chris@16:   // Thread-specific storage to allow unlocked access to determine whether a
Chris@16:   // thread is a member of the pool.
Chris@16:   DWORD tss_key_;
Chris@16: };
Chris@16: 
Chris@16: } // namespace detail
Chris@16: } // namespace asio
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #include <boost/asio/detail/pop_options.hpp>
Chris@16: 
Chris@16: #if defined(BOOST_ASIO_HEADER_ONLY)
Chris@16: # include <boost/asio/detail/impl/win_tss_ptr.ipp>
Chris@16: #endif // defined(BOOST_ASIO_HEADER_ONLY)
Chris@16: 
Chris@16: #endif // defined(BOOST_ASIO_WINDOWS)
Chris@16: 
Chris@16: #endif // BOOST_ASIO_DETAIL_WIN_TSS_PTR_HPP