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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_POSIX_PIPE_HPP
#define BOOST_PROCESS_POSIX_PIPE_HPP
#include <boost/filesystem.hpp>
#include <boost/process/detail/posix/compare_handles.hpp>
#include <system_error>
#include <array>
#include <unistd.h>
#include <fcntl.h>
#include <memory>
namespace boost { namespace process { namespace detail { namespace posix {
template<class CharT, class Traits = std::char_traits<CharT>>
class basic_pipe
{
int _source = -1;
int _sink = -1;
public:
explicit basic_pipe(int source, int sink) : _source(source), _sink(sink) {}
explicit basic_pipe(int source, int sink, const std::string&) : _source(source), _sink(sink) {}
typedef CharT char_type ;
typedef Traits traits_type;
typedef typename Traits::int_type int_type ;
typedef typename Traits::pos_type pos_type ;
typedef typename Traits::off_type off_type ;
typedef int native_handle_type;
basic_pipe()
{
int fds[2];
if (::pipe(fds) == -1)
boost::process::detail::throw_last_error("pipe(2) failed");
_source = fds[0];
_sink = fds[1];
}
inline basic_pipe(const basic_pipe& rhs);
explicit inline basic_pipe(const std::string& name);
basic_pipe(basic_pipe&& lhs) : _source(lhs._source), _sink(lhs._sink)
{
lhs._source = -1;
lhs._sink = -1;
}
inline basic_pipe& operator=(const basic_pipe& );
basic_pipe& operator=(basic_pipe&& lhs)
{
_source = lhs._source;
_sink = lhs._sink ;
lhs._source = -1;
lhs._sink = -1;
return *this;
}
~basic_pipe()
{
if (_sink != -1)
::close(_sink);
if (_source != -1)
::close(_source);
}
native_handle_type native_source() const {return _source;}
native_handle_type native_sink () const {return _sink;}
void assign_source(native_handle_type h) { _source = h;}
void assign_sink (native_handle_type h) { _sink = h;}
int_type write(const char_type * data, int_type count)
{
auto write_len = ::write(_sink, data, count * sizeof(char_type));
if (write_len == -1)
::boost::process::detail::throw_last_error();
return write_len;
}
int_type read(char_type * data, int_type count)
{
auto read_len = ::read(_source, data, count * sizeof(char_type));
if (read_len == -1)
::boost::process::detail::throw_last_error();
return read_len;
}
bool is_open()
{
return (_source != -1) ||
(_sink != -1);
}
void close()
{
if (_source != -1)
::close(_source);
if (_sink != -1)
::close(_sink);
_source = -1;
_sink = -1;
}
};
template<class CharT, class Traits>
basic_pipe<CharT, Traits>::basic_pipe(const basic_pipe & rhs)
{
if (rhs._source != -1)
{
_source = ::dup(rhs._source);
if (_source == -1)
::boost::process::detail::throw_last_error("dup() failed");
}
if (rhs._sink != -1)
{
_sink = ::dup(rhs._sink);
if (_sink == -1)
::boost::process::detail::throw_last_error("dup() failed");
}
}
template<class CharT, class Traits>
basic_pipe<CharT, Traits> &basic_pipe<CharT, Traits>::operator=(const basic_pipe & rhs)
{
if (rhs._source != -1)
{
_source = ::dup(rhs._source);
if (_source == -1)
::boost::process::detail::throw_last_error("dup() failed");
}
if (rhs._sink != -1)
{
_sink = ::dup(rhs._sink);
if (_sink == -1)
::boost::process::detail::throw_last_error("dup() failed");
}
return *this;
}
template<class CharT, class Traits>
basic_pipe<CharT, Traits>::basic_pipe(const std::string & name)
{
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();
_sink = write_fd;
_source = read_fd;
::unlink(name.c_str());
}
template<class Char, class Traits>
inline bool operator==(const basic_pipe<Char, Traits> & 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 basic_pipe<Char, Traits> & rhs)
{
return !compare_handles(lhs.native_source(), rhs.native_source()) ||
!compare_handles(lhs.native_sink(), rhs.native_sink());
}
}}}}
#endif
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