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async_pipe.hpp
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// Copyright (c) 2006, 2007 Julio M. Merino Vidal // Copyright (c) 2008 Ilya Sokolov, Boris Schaeling // Copyright (c) 2009 Boris Schaeling // Copyright (c) 2010 Felipe Tanus, Boris Schaeling // Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling // // 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_PROCESS_ASYNC_PIPE_HPP #define BOOST_PROCESS_ASYNC_PIPE_HPP #include <boost/config.hpp> #include <boost/process/detail/config.hpp> #if defined(BOOST_POSIX_API) #include <boost/process/detail/posix/async_pipe.hpp> #elif defined(BOOST_WINDOWS_API) #include <boost/process/detail/windows/async_pipe.hpp> #endif namespace boost { namespace process { #if defined(BOOST_PROCESS_DOXYGEN) /** Class implementing and asnychronous I/O-Object for use with boost.asio. * It is based on the corresponding I/O Object, that is either boost::asio::windows::stream_handle or * boost::asio::posix::stream_descriptor. * * It can be used directly with boost::asio::async_read or async_write. * * \note The object is copyable, but that does invoke a handle duplicate. */ class async_pipe { public: /** Typedef for the native handle representation. * \note This is the handle on the system, not the boost.asio class. * */ typedef platform_specific native_handle_type; /** Typedef for the handle representation of boost.asio. * */ typedef platform_specific handle_type; typedef typename handle_type::executor_type executor_type; /** Construct a new async_pipe, does automatically open the pipe. * Initializes source and sink with the same io_context. * @note Windows creates a named pipe here, where the name is automatically generated. */ inline async_pipe(boost::asio::io_context & ios); /** Construct a new async_pipe, does automatically open the pipe. * @note Windows creates a named pipe here, where the name is automatically generated. */ inline async_pipe(boost::asio::io_context & ios_source, boost::asio::io_context & ios_sink); /** Construct a new async_pipe, does automatically open. * Initializes source and sink with the same io_context. * * @note Windows restricts possible names. */ inline async_pipe(boost::asio::io_context & ios, const std::string & name); /** Construct a new async_pipe, does automatically open. * * @note Windows restricts possible names. */ inline async_pipe(boost::asio::io_context & ios_source, boost::asio::io_context & ios_sink, const std::string & name); /** Copy-Constructor of the async pipe. * @note Windows requires a named pipe for this, if a the wrong type is used an exception is thrown. * */ async_pipe(const async_pipe& lhs); /** Move-Constructor of the async pipe. */ async_pipe(async_pipe&& lhs); /** Construct the async-pipe from a pipe. * @note Windows requires a named pipe for this, if a the wrong type is used an exception is thrown. * */ template<class CharT, class Traits = std::char_traits<CharT>> explicit async_pipe(boost::asio::io_context & ios, const basic_pipe<CharT, Traits> & p); /** Construct the async-pipe from a pipe, with two different io_context objects. * @note Windows requires a named pipe for this, if a the wrong type is used an exception is thrown. * */ template<class CharT, class Traits = std::char_traits<CharT>> explicit async_pipe(boost::asio::io_context & ios_source, boost::asio::io_context & ios_sink, const basic_pipe<CharT, Traits> & p); /** Assign a basic_pipe. * @note Windows requires a named pipe for this, if a the wrong type is used an exception is thrown. * */ template<class CharT, class Traits = std::char_traits<CharT>> inline async_pipe& operator=(const basic_pipe<CharT, Traits>& p); /** Copy Assign a pipe. * @note Duplicates the handles. */ async_pipe& operator=(const async_pipe& lhs); /** Move assign a pipe */ async_pipe& operator=(async_pipe&& lhs); /** Destructor. Closes the pipe handles. */ ~async_pipe(); /** Explicit cast to basic_pipe. */ template<class CharT, class Traits = std::char_traits<CharT>> inline explicit operator basic_pipe<CharT, Traits>() const; /** Cancel the current asynchronous operations. */ void cancel(); /** Close the pipe handles. */ void close(); /** Close the pipe handles. While passing an error_code * */ void close(std::error_code & ec); /** Check if the pipes are open. */ bool is_open() const; /** Async close, i.e. close after current operation is completed. * * \note There is no guarantee that this will indeed read the entire pipe-buffer */ void async_close(); /** Read some data from the handle. * See the boost.asio documentation for more details. */ template<typename MutableBufferSequence> std::size_t read_some(const MutableBufferSequence & buffers); /** Write some data to the handle. * See the boost.asio documentation for more details. */ template<typename MutableBufferSequence> std::size_t write_some(const MutableBufferSequence & buffers); /** Get the native handle of the source. */ native_handle native_source() const {return const_cast<boost::asio::windows::stream_handle&>(_source).native();} /** Get the native handle of the sink. */ native_handle native_sink () const {return const_cast<boost::asio::windows::stream_handle&>(_sink ).native();} /** Start an asynchronous read. * * See the [boost.asio documentation](http://www.boost.org/doc/libs/1_60_0/doc/html/boost_asio/reference/AsyncReadStream.html) for more details. */ template<typename MutableBufferSequence, typename ReadHandler> detail::dummy async_read_some( const MutableBufferSequence & buffers, ReadHandler &&handler); /** Start an asynchronous write. * See the [boost.asio documentation](http://www.boost.org/doc/libs/1_60_0/doc/html/boost_asio/reference/AsyncWriteStream.html) for more details. */ template<typename ConstBufferSequence, typename WriteHandler> detail::dummy async_write_some( const ConstBufferSequence & buffers, WriteHandler && handler); ///Get the asio handle of the pipe sink. const handle_type & sink () const &; ///Get the asio handle of the pipe source. const handle_type & source() const &; ///Get the asio handle of the pipe sink. Qualified as rvalue handle_type && sink () &&; ///Get the asio handle of the pipe source. Qualified as rvalue handle_type && source() &&; /// Move the source out of this class and change the io_context. Qualified as rvalue. \attention Will always move. handle_type source(::boost::asio::io_context& ios) &&; /// Move the sink out of this class and change the io_context. Qualified as rvalue. \attention Will always move handle_type sink (::boost::asio::io_context& ios) &&; /// Copy the source out of this class and change the io_context. \attention Will always copy. handle_type source(::boost::asio::io_context& ios) const &; /// Copy the sink out of this class and change the io_context. \attention Will always copy handle_type sink (::boost::asio::io_context& ios) const &; }; #else using ::boost::process::detail::api::async_pipe; #endif }} #endif