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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)
/**
* \file boost/process/mitigate.hpp
*
* Helpers to mitigate platform differences.
*/
#ifndef BOOST_PROCESS_MITIGATE_HPP
#define BOOST_PROCESS_MITIGATE_HPP
#include <boost/asio.hpp>
#if defined(BOOST_POSIX_API)
# include <sys/wait.h>
#endif
namespace boost { namespace process {
#if defined(BOOST_WINDOWS_API)
typedef boost::asio::windows::stream_handle pipe_end;
#elif defined(BOOST_POSIX_API)
typedef boost::asio::posix::stream_descriptor pipe_end;
#endif
inline const char *zero_device()
{
#if defined(BOOST_WINDOWS_API)
return "NUL";
#elif defined(BOOST_POSIX_API)
return "/dev/zero";
#endif
}
inline const char *null_device()
{
#if defined(BOOST_WINDOWS_API)
return "NUL";
#elif defined(BOOST_POSIX_API)
return "/dev/null";
#endif
}
#if defined(BOOST_WINDOWS_API)
# define BOOST_PROCESS_EXITSTATUS(a) static_cast<int>(a)
#elif defined(BOOST_POSIX_API)
# define BOOST_PROCESS_EXITSTATUS WEXITSTATUS
#endif
#if defined(BOOST_PROCESS_DOXYGEN)
/**
* Type definition for the end of a pipe.
*
* On Windows the type is based on boost::asio::windows::stream_handle. On
* POSIX it is based on boost::asio::posix::stream_descriptor.
*
* You can use this type definition for asynchronous I/O with streams of
* child processes.
*/
typedef boost_asio_type pipe_end;
/**
* Gets the name of the zero device.
*
* You can use zero_device to initialize a
* boost::iostreams::file_descriptor_source to read
* null characters from.
*
* \returns NUL on Windows and /dev/zero on POSIX.
*/
const char *zero_device();
/**
* Gets the name of the null device.
*
* You can use null_device to initialize a
* boost::iostreams::file_descriptor_sink which discards
* data written to it.
*
* \returns NUL on Windows and /dev/null on POSIX.
*/
const char *null_device();
/**
* \def BOOST_PROCESS_EXITSTATUS
*
* On Windows \c BOOST_PROCESS_EXITSTATUS is a static cast to \c int.
* On POSIX it is set to \c WEXITSTATUS.
*
* You can use \c BOOST_PROCESS_EXITSTATUS for the return value of
* boost::process::wait_for_exit to get the exit status of a process.
*/
#define BOOST_PROCESS_EXITSTATUS
#endif
}}
#endif
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