detail/windows/null_in.hpp

0001 // Copyright (c) 2006, 2007 Julio M. Merino Vidal
0002 // Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
0003 // Copyright (c) 2009 Boris Schaeling
0004 // Copyright (c) 2010 Felipe Tanus, Boris Schaeling
0005 // Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
0006 //
0007 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0009
0010 #ifndef BOOST_PROCESS_WINDOWS_INITIALIZERS_NULL_IN_HPP
0011 #define BOOST_PROCESS_WINDOWS_INITIALIZERS_NULL_IN_HPP
0012
0013 #include <boost/winapi/process.hpp>
0014 #include <boost/winapi/handles.hpp>
0015 #include <boost/winapi/handle_info.hpp>
0016 #include <boost/process/detail/handler_base.hpp>
0017 #include <boost/process/detail/used_handles.hpp>
0018 #include <boost/process/detail/windows/file_descriptor.hpp>
0019
0020 namespace boost { namespace process { namespace detail { namespace windows {
0021
0022 struct null_in : public ::boost::process::detail::handler_base, ::boost::process::detail::uses_handles
0023 {
0024     file_descriptor source{"NUL", file_descriptor::read};
0025
0026     ::boost::winapi::HANDLE_ get_used_handles() const { return source.handle(); }
0027
0028
0029 public:
0030     template <class WindowsExecutor>
0031     void on_setup(WindowsExecutor &e) const
0032     {
0033         boost::winapi::SetHandleInformation(source.handle(),
0034                 boost::winapi::HANDLE_FLAG_INHERIT_,
0035                 boost::winapi::HANDLE_FLAG_INHERIT_);
0036
0037         e.startup_info.hStdInput = source.handle();
0038         e.startup_info.dwFlags  |= boost::winapi::STARTF_USESTDHANDLES_;
0039         e.inherit_handles = true;
0040     }
0041 };
0042
0043 }}}}
0044
0045 #endif