null_in.hpp 1.5 KB

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  1. // Copyright (c) 2006, 2007 Julio M. Merino Vidal
  2. // Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
  3. // Copyright (c) 2009 Boris Schaeling
  4. // Copyright (c) 2010 Felipe Tanus, Boris Schaeling
  5. // Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
  6. //
  7. // Distributed under the Boost Software License, Version 1.0. (See accompanying
  8. // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  9. #ifndef BOOST_PROCESS_WINDOWS_INITIALIZERS_NULL_IN_HPP
  10. #define BOOST_PROCESS_WINDOWS_INITIALIZERS_NULL_IN_HPP
  11. #include <boost/winapi/process.hpp>
  12. #include <boost/winapi/handles.hpp>
  13. #include <boost/winapi/handle_info.hpp>
  14. #include <boost/process/detail/handler_base.hpp>
  15. #include <boost/process/detail/used_handles.hpp>
  16. #include <boost/process/detail/windows/file_descriptor.hpp>
  17. namespace boost { namespace process { namespace detail { namespace windows {
  18. struct null_in : public ::boost::process::detail::handler_base, ::boost::process::detail::uses_handles
  19. {
  20. file_descriptor source{"NUL", file_descriptor::read};
  21. ::boost::winapi::HANDLE_ get_used_handles() const { return source.handle(); }
  22. public:
  23. template <class WindowsExecutor>
  24. void on_setup(WindowsExecutor &e) const
  25. {
  26. boost::winapi::SetHandleInformation(source.handle(),
  27. boost::winapi::HANDLE_FLAG_INHERIT_,
  28. boost::winapi::HANDLE_FLAG_INHERIT_);
  29. e.startup_info.hStdInput = source.handle();
  30. e.startup_info.dwFlags |= boost::winapi::STARTF_USESTDHANDLES_;
  31. e.inherit_handles = true;
  32. }
  33. };
  34. }}}}
  35. #endif