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+//
+// basic_handle.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_WINDOWS_BASIC_HANDLE_HPP
+#define BOOST_ASIO_WINDOWS_BASIC_HANDLE_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/asio/detail/pop_options.hpp>
+
+#include <boost/asio/basic_io_object.hpp>
+#include <boost/asio/error.hpp>
+#include <boost/asio/detail/throw_error.hpp>
+
+namespace boost {
+namespace asio {
+namespace windows {
+
+/// Provides Windows handle functionality.
+/**
+ * The windows::basic_handle class template provides the ability to wrap a
+ * Windows handle.
+ *
+ * @par Thread Safety
+ * @e Distinct @e objects: Safe.@n
+ * @e Shared @e objects: Unsafe.
+ */
+template <typename HandleService>
+class basic_handle
+  : public basic_io_object<HandleService>
+{
+public:
+  /// The native representation of a handle.
+  typedef typename HandleService::native_type native_type;
+
+  /// A basic_handle is always the lowest layer.
+  typedef basic_handle<HandleService> lowest_layer_type;
+
+  /// Construct a basic_handle without opening it.
+  /**
+   * This constructor creates a handle without opening it.
+   *
+   * @param io_service The io_service object that the handle will use to
+   * dispatch handlers for any asynchronous operations performed on the handle.
+   */
+  explicit basic_handle(boost::asio::io_service& io_service)
+    : basic_io_object<HandleService>(io_service)
+  {
+  }
+
+  /// Construct a basic_handle on an existing native handle.
+  /**
+   * This constructor creates a handle object to hold an existing native handle.
+   *
+   * @param io_service The io_service object that the handle will use to
+   * dispatch handlers for any asynchronous operations performed on the handle.
+   *
+   * @param native_handle A native handle.
+   *
+   * @throws boost::system::system_error Thrown on failure.
+   */
+  basic_handle(boost::asio::io_service& io_service,
+      const native_type& native_handle)
+    : basic_io_object<HandleService>(io_service)
+  {
+    boost::system::error_code ec;
+    this->service.assign(this->implementation, native_handle, ec);
+    boost::asio::detail::throw_error(ec);
+  }
+
+  /// Get a reference to the lowest layer.
+  /**
+   * This function returns a reference to the lowest layer in a stack of
+   * layers. Since a basic_handle cannot contain any further layers, it simply
+   * returns a reference to itself.
+   *
+   * @return A reference to the lowest layer in the stack of layers. Ownership
+   * is not transferred to the caller.
+   */
+  lowest_layer_type& lowest_layer()
+  {
+    return *this;
+  }
+
+  /// Get a const reference to the lowest layer.
+  /**
+   * This function returns a const reference to the lowest layer in a stack of
+   * layers. Since a basic_handle cannot contain any further layers, it simply
+   * returns a reference to itself.
+   *
+   * @return A const reference to the lowest layer in the stack of layers.
+   * Ownership is not transferred to the caller.
+   */
+  const lowest_layer_type& lowest_layer() const
+  {
+    return *this;
+  }
+
+  /// Assign an existing native handle to the handle.
+  /*
+   * This function opens the handle to hold an existing native handle.
+   *
+   * @param native_handle A native handle.
+   *
+   * @throws boost::system::system_error Thrown on failure.
+   */
+  void assign(const native_type& native_handle)
+  {
+    boost::system::error_code ec;
+    this->service.assign(this->implementation, native_handle, ec);
+    boost::asio::detail::throw_error(ec);
+  }
+
+  /// Assign an existing native handle to the handle.
+  /*
+   * This function opens the handle to hold an existing native handle.
+   *
+   * @param native_handle A native handle.
+   *
+   * @param ec Set to indicate what error occurred, if any.
+   */
+  boost::system::error_code assign(const native_type& native_handle,
+      boost::system::error_code& ec)
+  {
+    return this->service.assign(this->implementation, native_handle, ec);
+  }
+
+  /// Determine whether the handle is open.
+  bool is_open() const
+  {
+    return this->service.is_open(this->implementation);
+  }
+
+  /// Close the handle.
+  /**
+   * This function is used to close the handle. Any asynchronous read or write
+   * operations will be cancelled immediately, and will complete with the
+   * boost::asio::error::operation_aborted error.
+   *
+   * @throws boost::system::system_error Thrown on failure.
+   */
+  void close()
+  {
+    boost::system::error_code ec;
+    this->service.close(this->implementation, ec);
+    boost::asio::detail::throw_error(ec);
+  }
+
+  /// Close the handle.
+  /**
+   * This function is used to close the handle. Any asynchronous read or write
+   * operations will be cancelled immediately, and will complete with the
+   * boost::asio::error::operation_aborted error.
+   *
+   * @param ec Set to indicate what error occurred, if any.
+   */
+  boost::system::error_code close(boost::system::error_code& ec)
+  {
+    return this->service.close(this->implementation, ec);
+  }
+
+  /// Get the native handle representation.
+  /**
+   * This function may be used to obtain the underlying representation of the
+   * handle. This is intended to allow access to native handle functionality
+   * that is not otherwise provided.
+   */
+  native_type native()
+  {
+    return this->service.native(this->implementation);
+  }
+
+  /// Cancel all asynchronous operations associated with the handle.
+  /**
+   * This function causes all outstanding asynchronous read or write operations
+   * to finish immediately, and the handlers for cancelled operations will be
+   * passed the boost::asio::error::operation_aborted error.
+   *
+   * @throws boost::system::system_error Thrown on failure.
+   */
+  void cancel()
+  {
+    boost::system::error_code ec;
+    this->service.cancel(this->implementation, ec);
+    boost::asio::detail::throw_error(ec);
+  }
+
+  /// Cancel all asynchronous operations associated with the handle.
+  /**
+   * This function causes all outstanding asynchronous read or write operations
+   * to finish immediately, and the handlers for cancelled operations will be
+   * passed the boost::asio::error::operation_aborted error.
+   *
+   * @param ec Set to indicate what error occurred, if any.
+   */
+  boost::system::error_code cancel(boost::system::error_code& ec)
+  {
+    return this->service.cancel(this->implementation, ec);
+  }
+
+protected:
+  /// Protected destructor to prevent deletion through this type.
+  ~basic_handle()
+  {
+  }
+};
+
+} // namespace windows
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_WINDOWS_BASIC_HANDLE_HPP