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1 | // |
2 | // detail/win_tss_ptr.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com) | |
6 | // | |
7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
9 | // | |
10 | ||
11 | #ifndef BOOST_ASIO_DETAIL_WIN_TSS_PTR_HPP | |
12 | #define BOOST_ASIO_DETAIL_WIN_TSS_PTR_HPP | |
13 | ||
14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) | |
15 | # pragma once | |
16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) | |
17 | ||
18 | #include <boost/asio/detail/config.hpp> | |
19 | ||
20 | #if defined(BOOST_ASIO_WINDOWS) | |
21 | ||
22 | #include <boost/asio/detail/noncopyable.hpp> | |
23 | #include <boost/asio/detail/socket_types.hpp> | |
24 | ||
25 | #include <boost/asio/detail/push_options.hpp> | |
26 | ||
27 | namespace boost { | |
28 | namespace asio { | |
29 | namespace detail { | |
30 | ||
31 | // Helper function to create thread-specific storage. | |
32 | BOOST_ASIO_DECL DWORD win_tss_ptr_create(); | |
33 | ||
34 | template <typename T> | |
35 | class win_tss_ptr | |
36 | : private noncopyable | |
37 | { | |
38 | public: | |
39 | // Constructor. | |
40 | win_tss_ptr() | |
41 | : tss_key_(win_tss_ptr_create()) | |
42 | { | |
43 | } | |
44 | ||
45 | // Destructor. | |
46 | ~win_tss_ptr() | |
47 | { | |
48 | ::TlsFree(tss_key_); | |
49 | } | |
50 | ||
51 | // Get the value. | |
52 | operator T*() const | |
53 | { | |
54 | return static_cast<T*>(::TlsGetValue(tss_key_)); | |
55 | } | |
56 | ||
57 | // Set the value. | |
58 | void operator=(T* value) | |
59 | { | |
60 | ::TlsSetValue(tss_key_, value); | |
61 | } | |
62 | ||
63 | private: | |
64 | // Thread-specific storage to allow unlocked access to determine whether a | |
65 | // thread is a member of the pool. | |
66 | DWORD tss_key_; | |
67 | }; | |
68 | ||
69 | } // namespace detail | |
70 | } // namespace asio | |
71 | } // namespace boost | |
72 | ||
73 | #include <boost/asio/detail/pop_options.hpp> | |
74 | ||
75 | #if defined(BOOST_ASIO_HEADER_ONLY) | |
76 | # include <boost/asio/detail/impl/win_tss_ptr.ipp> | |
77 | #endif // defined(BOOST_ASIO_HEADER_ONLY) | |
78 | ||
79 | #endif // defined(BOOST_ASIO_WINDOWS) | |
80 | ||
81 | #endif // BOOST_ASIO_DETAIL_WIN_TSS_PTR_HPP |