detail/windows/file_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_DETAIL_WINDOWS_FILE_IN_HPP
0011 #define BOOST_PROCESS_DETAIL_WINDOWS_FILE_IN_HPP
0012
0013 #include <boost/winapi/process.hpp>
0014 #include <boost/winapi/handles.hpp>
0015 #include <boost/process/detail/handler_base.hpp>
0016 #include <boost/process/detail/used_handles.hpp>
0017 #include <boost/process/detail/windows/file_descriptor.hpp>
0018 #include <io.h>
0019
0020 namespace boost { namespace process { namespace detail { namespace windows {
0021
0022 struct file_in : public ::boost::process::detail::handler_base,
0023                         ::boost::process::detail::uses_handles
0024 {
0025     file_descriptor file;
0026     ::boost::winapi::HANDLE_ handle = file.handle();
0027
0028     ::boost::winapi::HANDLE_ get_used_handles() const { return handle; }
0029
0030     template<typename T>
0031     file_in(T&& t) : file(std::forward<T>(t), file_descriptor::read) {}
0032     file_in(FILE * f) : handle(reinterpret_cast<::boost::winapi::HANDLE_>(_get_osfhandle(_fileno(f)))) {}
0033
0034     template <class WindowsExecutor>
0035     void on_setup(WindowsExecutor &e) const
0036     {
0037         boost::winapi::SetHandleInformation(handle,
0038                 boost::winapi::HANDLE_FLAG_INHERIT_,
0039                 boost::winapi::HANDLE_FLAG_INHERIT_);
0040         e.startup_info.hStdInput = handle;
0041         e.startup_info.dwFlags  |= boost::winapi::STARTF_USESTDHANDLES_;
0042         e.inherit_handles = true;
0043     }
0044 };
0045
0046 }}}}
0047
0048 #endif