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