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119 lines
3.0 KiB
C++
119 lines
3.0 KiB
C++
//
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// windows/overlapped_ptr.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_ASIO_WINDOWS_OVERLAPPED_PTR_HPP
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#define BOOST_ASIO_WINDOWS_OVERLAPPED_PTR_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <boost/asio/detail/config.hpp>
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#if defined(BOOST_ASIO_HAS_WINDOWS_OVERLAPPED_PTR) \
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|| defined(GENERATING_DOCUMENTATION)
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#include <boost/asio/detail/noncopyable.hpp>
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#include <boost/asio/detail/win_iocp_overlapped_ptr.hpp>
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#include <boost/asio/io_service.hpp>
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#include <boost/asio/detail/push_options.hpp>
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namespace boost {
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namespace asio {
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namespace windows {
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/// Wraps a handler to create an OVERLAPPED object for use with overlapped I/O.
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/**
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* A special-purpose smart pointer used to wrap an application handler so that
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* it can be passed as the LPOVERLAPPED argument to overlapped I/O functions.
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*
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* @par Thread Safety
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* @e Distinct @e objects: Safe.@n
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* @e Shared @e objects: Unsafe.
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*/
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class overlapped_ptr
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: private noncopyable
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{
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public:
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/// Construct an empty overlapped_ptr.
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overlapped_ptr()
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: impl_()
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{
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}
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/// Construct an overlapped_ptr to contain the specified handler.
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template <typename Handler>
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explicit overlapped_ptr(boost::asio::io_service& io_service,
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BOOST_ASIO_MOVE_ARG(Handler) handler)
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: impl_(io_service, BOOST_ASIO_MOVE_CAST(Handler)(handler))
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{
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}
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/// Destructor automatically frees the OVERLAPPED object unless released.
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~overlapped_ptr()
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{
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}
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/// Reset to empty.
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void reset()
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{
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impl_.reset();
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}
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/// Reset to contain the specified handler, freeing any current OVERLAPPED
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/// object.
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template <typename Handler>
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void reset(boost::asio::io_service& io_service,
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BOOST_ASIO_MOVE_ARG(Handler) handler)
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{
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impl_.reset(io_service, BOOST_ASIO_MOVE_CAST(Handler)(handler));
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}
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/// Get the contained OVERLAPPED object.
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OVERLAPPED* get()
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{
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return impl_.get();
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}
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/// Get the contained OVERLAPPED object.
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const OVERLAPPED* get() const
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{
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return impl_.get();
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}
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/// Release ownership of the OVERLAPPED object.
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OVERLAPPED* release()
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{
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return impl_.release();
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}
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/// Post completion notification for overlapped operation. Releases ownership.
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void complete(const boost::system::error_code& ec,
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std::size_t bytes_transferred)
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{
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impl_.complete(ec, bytes_transferred);
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}
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private:
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detail::win_iocp_overlapped_ptr impl_;
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};
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} // namespace windows
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} // namespace asio
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} // namespace boost
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#include <boost/asio/detail/pop_options.hpp>
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#endif // defined(BOOST_ASIO_HAS_WINDOWS_OVERLAPPED_PTR)
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// || defined(GENERATING_DOCUMENTATION)
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#endif // BOOST_ASIO_WINDOWS_OVERLAPPED_PTR_HPP
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