| // |
| // win_tss_ptr.hpp |
| // ~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2008 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_TSS_PTR_HPP |
| #define ASIO_DETAIL_WIN_TSS_PTR_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/push_options.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| #include <boost/config.hpp> |
| #include "asio/detail/pop_options.hpp" |
| |
| #if defined(BOOST_WINDOWS) |
| |
| #include "asio/error.hpp" |
| #include "asio/system_error.hpp" |
| #include "asio/detail/noncopyable.hpp" |
| #include "asio/detail/socket_types.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| #include <boost/throw_exception.hpp> |
| #include "asio/detail/pop_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| template <typename T> |
| class win_tss_ptr |
| : private noncopyable |
| { |
| public: |
| #if defined(UNDER_CE) |
| enum { out_of_indexes = 0xFFFFFFFF }; |
| #else |
| enum { out_of_indexes = TLS_OUT_OF_INDEXES }; |
| #endif |
| |
| // Constructor. |
| win_tss_ptr() |
| { |
| tss_key_ = ::TlsAlloc(); |
| if (tss_key_ == out_of_indexes) |
| { |
| DWORD last_error = ::GetLastError(); |
| asio::system_error e( |
| asio::error_code(last_error, |
| asio::error::get_system_category()), |
| "tss"); |
| boost::throw_exception(e); |
| } |
| } |
| |
| // 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 |
| |
| #endif // defined(BOOST_WINDOWS) |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_DETAIL_WIN_TSS_PTR_HPP |