ceph/src/boost/boost/process/detail/windows/null_out.hpp

   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
  10 #ifndef BOOST_PROCESS_WINDOWS_INITIALIZERS_NULL_OUT_HPP
  11 #define BOOST_PROCESS_WINDOWS_INITIALIZERS_NULL_OUT_HPP
  12
  13 #include <boost/winapi/process.hpp>
  14 #include <boost/winapi/handles.hpp>
  15 #include <boost/winapi/handle_info.hpp>
  16 #include <boost/process/detail/handler_base.hpp>
  17 #include <boost/process/detail/windows/file_descriptor.hpp>
  18
  19 namespace boost { namespace process { namespace detail { namespace windows {
  20
  21 template<int p1, int p2>
  22 struct null_out : public ::boost::process::detail::handler_base
  23 {
  24     file_descriptor sink {"NUL", file_descriptor::write}; //works because it gets destroyed AFTER launch.
  25
  26     template <typename WindowsExecutor>
  27     void on_setup(WindowsExecutor &e) const;
  28 };
  29
  30 template<>
  31 template<typename WindowsExecutor>
  32 void null_out<1,-1>::on_setup(WindowsExecutor &e) const
  33 {
  34     boost::winapi::SetHandleInformation(sink.handle(),
  35               boost::winapi::HANDLE_FLAG_INHERIT_,
  36               boost::winapi::HANDLE_FLAG_INHERIT_);
  37
  38     e.startup_info.hStdOutput = sink.handle();
  39     e.startup_info.dwFlags   |= ::boost::winapi::STARTF_USESTDHANDLES_;
  40     e.inherit_handles = true;
  41
  42 }
  43
  44 template<>
  45 template<typename WindowsExecutor>
  46 void null_out<2,-1>::on_setup(WindowsExecutor &e) const
  47 {
  48     boost::winapi::SetHandleInformation(sink.handle(),
  49               boost::winapi::HANDLE_FLAG_INHERIT_,
  50               boost::winapi::HANDLE_FLAG_INHERIT_);
  51
  52     e.startup_info.hStdError = sink.handle();
  53     e.startup_info.dwFlags  |= ::boost::winapi::STARTF_USESTDHANDLES_;
  54     e.inherit_handles = true;
  55
  56 }
  57
  58 template<>
  59 template<typename WindowsExecutor>
  60 void null_out<1,2>::on_setup(WindowsExecutor &e) const
  61 {
  62     boost::winapi::SetHandleInformation(sink.handle(),
  63             boost::winapi::HANDLE_FLAG_INHERIT_,
  64             boost::winapi::HANDLE_FLAG_INHERIT_);
  65
  66     e.startup_info.hStdOutput = sink.handle();
  67     e.startup_info.hStdError  = sink.handle();
  68     e.startup_info.dwFlags   |= ::boost::winapi::STARTF_USESTDHANDLES_;
  69     e.inherit_handles = true;
  70
  71 }
  72
  73 }}}}
  74
  75 #endif