ceph/src/boost/libs/asio/include/boost/asio/detail/win_tss_ptr.hpp

   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