boost/process/detail/windows/null_out.hpp

   1 // Copyright (c) 2006, 2007 Julio M. Merino Vidal\r
   2 // Copyright (c) 2008 Ilya Sokolov, Boris Schaeling\r
   3 // Copyright (c) 2009 Boris Schaeling\r
   4 // Copyright (c) 2010 Felipe Tanus, Boris Schaeling\r
   5 // Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling\r
   6 //\r
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying\r
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)\r
   9
  10 #ifndef BOOST_PROCESS_WINDOWS_INITIALIZERS_NULL_OUT_HPP\r
  11 #define BOOST_PROCESS_WINDOWS_INITIALIZERS_NULL_OUT_HPP\r
  12
  13 #include <boost/detail/winapi/process.hpp>\r
  14 #include <boost/detail/winapi/handles.hpp>\r
  15 #include <boost/detail/winapi/handle_info.hpp>\r
  16 #include <boost/process/detail/handler_base.hpp>\r
  17 #include <boost/process/detail/windows/file_descriptor.hpp>\r
  18
  19 namespace boost { namespace process { namespace detail { namespace windows {\r
  20
  21 template<int p1, int p2>\r
  22 struct null_out : public ::boost::process::detail::handler_base\r
  23 {\r
  24     file_descriptor sink {"NUL", file_descriptor::write}; //works because it gets destroyed AFTER launch.\r
  25
  26     template <typename WindowsExecutor>\r
  27     void on_setup(WindowsExecutor &e) const;\r
  28 };\r
  29
  30 template<>\r
  31 template<typename WindowsExecutor>\r
  32 void null_out<1,-1>::on_setup(WindowsExecutor &e) const\r
  33 {\r
  34     boost::detail::winapi::SetHandleInformation(sink.handle(),\r
  35               boost::detail::winapi::HANDLE_FLAG_INHERIT_,\r
  36               boost::detail::winapi::HANDLE_FLAG_INHERIT_);\r
  37
  38     e.startup_info.hStdOutput = sink.handle();\r
  39     e.startup_info.dwFlags   |= ::boost::detail::winapi::STARTF_USESTDHANDLES_;\r
  40     e.inherit_handles = true;\r
  41
  42 }\r
  43
  44 template<>\r
  45 template<typename WindowsExecutor>\r
  46 void null_out<2,-1>::on_setup(WindowsExecutor &e) const\r
  47 {\r
  48     boost::detail::winapi::SetHandleInformation(sink.handle(),\r
  49               boost::detail::winapi::HANDLE_FLAG_INHERIT_,\r
  50               boost::detail::winapi::HANDLE_FLAG_INHERIT_);\r
  51
  52     e.startup_info.hStdError = sink.handle();\r
  53     e.startup_info.dwFlags  |= ::boost::detail::winapi::STARTF_USESTDHANDLES_;\r
  54     e.inherit_handles = true;\r
  55
  56 }\r
  57
  58 template<>\r
  59 template<typename WindowsExecutor>\r
  60 void null_out<1,2>::on_setup(WindowsExecutor &e) const\r
  61 {\r
  62     boost::detail::winapi::SetHandleInformation(sink.handle(),\r
  63             boost::detail::winapi::HANDLE_FLAG_INHERIT_,\r
  64             boost::detail::winapi::HANDLE_FLAG_INHERIT_);\r
  65
  66     e.startup_info.hStdOutput = sink.handle();\r
  67     e.startup_info.hStdError  = sink.handle();\r
  68     e.startup_info.dwFlags   |= ::boost::detail::winapi::STARTF_USESTDHANDLES_;\r
  69     e.inherit_handles = true;\r
  70
  71 }\r
  72
  73 }}}}\r
  74
  75 #endif\r