| // Copyright (c) 2016 Klemens D. Morgenstern |
| // |
| // 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_DETAIL_POSIX_ASYNC_PIPE_HPP_ |
| #define BOOST_PROCESS_DETAIL_POSIX_ASYNC_PIPE_HPP_ |
| |
| |
| #include <boost/process/detail/posix/basic_pipe.hpp> |
| #include <boost/asio/posix/stream_descriptor.hpp> |
| #include <boost/asio/post.hpp> |
| #include <system_error> |
| #include <string> |
| #include <utility> |
| |
| namespace boost { namespace process { namespace detail { namespace posix { |
| |
| class async_pipe |
| { |
| ::boost::asio::posix::stream_descriptor _source; |
| ::boost::asio::posix::stream_descriptor _sink ; |
| public: |
| typedef int native_handle_type; |
| typedef ::boost::asio::posix::stream_descriptor handle_type; |
| typedef typename handle_type::executor_type executor_type; |
| |
| inline async_pipe(boost::asio::io_context & ios) : async_pipe(ios, ios) {} |
| |
| inline async_pipe(boost::asio::io_context & ios_source, |
| boost::asio::io_context & ios_sink) : _source(ios_source), _sink(ios_sink) |
| { |
| int fds[2]; |
| if (::pipe(fds) == -1) |
| boost::process::detail::throw_last_error("pipe(2) failed"); |
| |
| _source.assign(fds[0]); |
| _sink .assign(fds[1]); |
| }; |
| inline async_pipe(boost::asio::io_context & ios, const std::string & name) |
| : async_pipe(ios, ios, name) {} |
| |
| inline async_pipe(boost::asio::io_context & ios_source, |
| boost::asio::io_context & io_sink, const std::string & name); |
| inline async_pipe(const async_pipe& lhs); |
| async_pipe(async_pipe&& lhs) : _source(std::move(lhs._source)), _sink(std::move(lhs._sink)) |
| { |
| lhs._source.assign (-1); |
| lhs._sink .assign (-1); |
| } |
| |
| 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) |
| : _source(ios_source, p.native_source()), _sink(ios_sink, p.native_sink()) |
| { |
| } |
| |
| template<class CharT, class Traits = std::char_traits<CharT>> |
| explicit async_pipe(boost::asio::io_context & ios, const basic_pipe<CharT, Traits> & p) |
| : async_pipe(ios, ios, p) |
| { |
| } |
| |
| template<class CharT, class Traits = std::char_traits<CharT>> |
| inline async_pipe& operator=(const basic_pipe<CharT, Traits>& p); |
| inline async_pipe& operator=(const async_pipe& rhs); |
| |
| inline async_pipe& operator=(async_pipe&& lhs); |
| |
| ~async_pipe() |
| { |
| boost::system::error_code ec; |
| close(ec); |
| } |
| |
| template<class CharT, class Traits = std::char_traits<CharT>> |
| inline explicit operator basic_pipe<CharT, Traits>() const; |
| |
| void cancel() |
| { |
| if (_sink.is_open()) |
| _sink.cancel(); |
| if (_source.is_open()) |
| _source.cancel(); |
| } |
| |
| void close() |
| { |
| if (_sink.is_open()) |
| _sink.close(); |
| if (_source.is_open()) |
| _source.close(); |
| } |
| void close(boost::system::error_code & ec) |
| { |
| if (_sink.is_open()) |
| _sink.close(ec); |
| if (_source.is_open()) |
| _source.close(ec); |
| } |
| |
| |
| bool is_open() const |
| { |
| return _sink.is_open() || _source.is_open(); |
| } |
| void async_close() |
| { |
| if (_sink.is_open()) |
| boost::asio::post(_sink.get_executor(), [this]{_sink.close();}); |
| if (_source.is_open()) |
| boost::asio::post(_source.get_executor(), [this]{_source.close();}); |
| } |
| |
| template<typename MutableBufferSequence> |
| std::size_t read_some(const MutableBufferSequence & buffers) |
| { |
| return _source.read_some(buffers); |
| } |
| template<typename MutableBufferSequence> |
| std::size_t write_some(const MutableBufferSequence & buffers) |
| { |
| return _sink.write_some(buffers); |
| } |
| |
| template<typename MutableBufferSequence> |
| std::size_t read_some(const MutableBufferSequence & buffers, boost::system::error_code & ec) noexcept |
| { |
| return _source.read_some(buffers, ec); |
| } |
| template<typename MutableBufferSequence> |
| std::size_t write_some(const MutableBufferSequence & buffers, boost::system::error_code & ec) noexcept |
| { |
| return _sink.write_some(buffers, ec); |
| } |
| |
| |
| native_handle_type native_source() const {return const_cast<boost::asio::posix::stream_descriptor&>(_source).native_handle();} |
| native_handle_type native_sink () const {return const_cast<boost::asio::posix::stream_descriptor&>(_sink ).native_handle();} |
| |
| template<typename MutableBufferSequence, |
| typename ReadHandler> |
| BOOST_ASIO_INITFN_RESULT_TYPE( |
| ReadHandler, void(boost::system::error_code, std::size_t)) |
| async_read_some( |
| const MutableBufferSequence & buffers, |
| ReadHandler &&handler) |
| { |
| return _source.async_read_some(buffers, std::forward<ReadHandler>(handler)); |
| } |
| |
| template<typename ConstBufferSequence, |
| typename WriteHandler> |
| BOOST_ASIO_INITFN_RESULT_TYPE( |
| WriteHandler, void(boost::system::error_code, std::size_t)) |
| async_write_some( |
| const ConstBufferSequence & buffers, |
| WriteHandler&& handler) |
| { |
| return _sink.async_write_some(buffers, std::forward<WriteHandler>(handler)); |
| } |
| |
| |
| const handle_type & sink () const & {return _sink;} |
| const handle_type & source() const & {return _source;} |
| |
| handle_type && sink() && { return std::move(_sink); } |
| handle_type && source()&& { return std::move(_source); } |
| |
| handle_type source(::boost::asio::io_context& ios) && |
| { |
| ::boost::asio::posix::stream_descriptor stolen(ios, _source.release()); |
| return stolen; |
| } |
| handle_type sink (::boost::asio::io_context& ios) && |
| { |
| ::boost::asio::posix::stream_descriptor stolen(ios, _sink.release()); |
| return stolen; |
| } |
| |
| handle_type source(::boost::asio::io_context& ios) const & |
| { |
| auto source_in = const_cast<::boost::asio::posix::stream_descriptor &>(_source).native_handle(); |
| return ::boost::asio::posix::stream_descriptor(ios, ::dup(source_in)); |
| } |
| handle_type sink (::boost::asio::io_context& ios) const & |
| { |
| auto sink_in = const_cast<::boost::asio::posix::stream_descriptor &>(_sink).native_handle(); |
| return ::boost::asio::posix::stream_descriptor(ios, ::dup(sink_in)); |
| } |
| }; |
| |
| |
| async_pipe::async_pipe(boost::asio::io_context & ios_source, |
| boost::asio::io_context & ios_sink, |
| const std::string & name) : _source(ios_source), _sink(ios_sink) |
| { |
| auto fifo = mkfifo(name.c_str(), 0666 ); |
| |
| if (fifo != 0) |
| boost::process::detail::throw_last_error("mkfifo() failed"); |
| |
| |
| int read_fd = open(name.c_str(), O_RDWR); |
| |
| if (read_fd == -1) |
| boost::process::detail::throw_last_error(); |
| |
| int write_fd = dup(read_fd); |
| |
| if (write_fd == -1) |
| boost::process::detail::throw_last_error(); |
| |
| _source.assign(read_fd); |
| _sink .assign(write_fd); |
| } |
| |
| async_pipe::async_pipe(const async_pipe & p) : |
| _source(const_cast<async_pipe&>(p)._source.get_executor()), |
| _sink( const_cast<async_pipe&>(p)._sink.get_executor()) |
| { |
| |
| //cannot get the handle from a const object. |
| auto source_in = const_cast<::boost::asio::posix::stream_descriptor &>(_source).native_handle(); |
| auto sink_in = const_cast<::boost::asio::posix::stream_descriptor &>(_sink).native_handle(); |
| if (source_in == -1) |
| _source.assign(-1); |
| else |
| { |
| _source.assign(::dup(source_in)); |
| if (_source.native_handle()== -1) |
| ::boost::process::detail::throw_last_error("dup()"); |
| } |
| |
| if (sink_in == -1) |
| _sink.assign(-1); |
| else |
| { |
| _sink.assign(::dup(sink_in)); |
| if (_sink.native_handle() == -1) |
| ::boost::process::detail::throw_last_error("dup()"); |
| } |
| } |
| |
| async_pipe& async_pipe::operator=(const async_pipe & p) |
| { |
| int source; |
| int sink; |
| |
| //cannot get the handle from a const object. |
| auto source_in = const_cast<::boost::asio::posix::stream_descriptor &>(p._source).native_handle(); |
| auto sink_in = const_cast<::boost::asio::posix::stream_descriptor &>(p._sink).native_handle(); |
| if (source_in == -1) |
| source = -1; |
| else |
| { |
| source = ::dup(source_in); |
| if (source == -1) |
| ::boost::process::detail::throw_last_error("dup()"); |
| } |
| |
| if (sink_in == -1) |
| sink = -1; |
| else |
| { |
| sink = ::dup(sink_in); |
| if (sink == -1) |
| ::boost::process::detail::throw_last_error("dup()"); |
| } |
| _source.assign(source); |
| _sink. assign(sink); |
| |
| return *this; |
| } |
| |
| async_pipe& async_pipe::operator=(async_pipe && lhs) |
| { |
| std::swap(_source, lhs._source); |
| std::swap(_sink, lhs._sink); |
| return *this; |
| } |
| |
| template<class CharT, class Traits> |
| async_pipe::operator basic_pipe<CharT, Traits>() const |
| { |
| int source; |
| int sink; |
| |
| //cannot get the handle from a const object. |
| auto source_in = const_cast<::boost::asio::posix::stream_descriptor &>(_source).native_handle(); |
| auto sink_in = const_cast<::boost::asio::posix::stream_descriptor &>(_sink).native_handle(); |
| |
| |
| if (source_in == -1) |
| source = -1; |
| else |
| { |
| source = ::dup(source_in); |
| if (source == -1) |
| ::boost::process::detail::throw_last_error("dup()"); |
| } |
| |
| if (sink_in == -1) |
| sink = -1; |
| else |
| { |
| sink = ::dup(sink_in); |
| if (sink == -1) |
| ::boost::process::detail::throw_last_error("dup()"); |
| } |
| |
| return basic_pipe<CharT, Traits>{source, sink}; |
| } |
| |
| |
| inline bool operator==(const async_pipe & lhs, const async_pipe & rhs) |
| { |
| return compare_handles(lhs.native_source(), rhs.native_source()) && |
| compare_handles(lhs.native_sink(), rhs.native_sink()); |
| } |
| |
| inline bool operator!=(const async_pipe & lhs, const async_pipe & rhs) |
| { |
| return !compare_handles(lhs.native_source(), rhs.native_source()) || |
| !compare_handles(lhs.native_sink(), rhs.native_sink()); |
| } |
| |
| template<class Char, class Traits> |
| inline bool operator==(const async_pipe & lhs, const basic_pipe<Char, Traits> & rhs) |
| { |
| return compare_handles(lhs.native_source(), rhs.native_source()) && |
| compare_handles(lhs.native_sink(), rhs.native_sink()); |
| } |
| |
| template<class Char, class Traits> |
| inline bool operator!=(const async_pipe & lhs, const basic_pipe<Char, Traits> & rhs) |
| { |
| return !compare_handles(lhs.native_source(), rhs.native_source()) || |
| !compare_handles(lhs.native_sink(), rhs.native_sink()); |
| } |
| |
| template<class Char, class Traits> |
| inline bool operator==(const basic_pipe<Char, Traits> & lhs, const async_pipe & rhs) |
| { |
| return compare_handles(lhs.native_source(), rhs.native_source()) && |
| compare_handles(lhs.native_sink(), rhs.native_sink()); |
| } |
| |
| template<class Char, class Traits> |
| inline bool operator!=(const basic_pipe<Char, Traits> & lhs, const async_pipe & rhs) |
| { |
| return !compare_handles(lhs.native_source(), rhs.native_source()) || |
| !compare_handles(lhs.native_sink(), rhs.native_sink()); |
| } |
| |
| }}}} |
| |
| #endif /* INCLUDE_BOOST_PIPE_DETAIL_WINDOWS_ASYNC_PIPE_HPP_ */ |
