Imported existing code

libraries/include/boost/asio/detail/win_tss_ptr.hpp

@@ -0,0 +1,97 @@
+//
+// 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 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/push_options.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+#include <boost/config.hpp>
+#include <boost/system/system_error.hpp>
+#include <boost/asio/detail/pop_options.hpp>
+
+#if defined(BOOST_WINDOWS)
+
+#include <boost/asio/error.hpp>
+#include <boost/asio/detail/noncopyable.hpp>
+#include <boost/asio/detail/socket_types.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/asio/detail/pop_options.hpp>
+
+namespace boost {
+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();
+      boost::system::system_error e(
+          boost::system::error_code(last_error,
+            boost::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
+} // namespace boost
+
+#endif // defined(BOOST_WINDOWS)
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_WIN_TSS_PTR_HPP