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

   1 // Copyright (c) 2016 Klemens D. Morgenstern
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_PROCESS_DETAIL_WINDOWS_FILE_DESCRIPTOR_HPP_
   7 #define BOOST_PROCESS_DETAIL_WINDOWS_FILE_DESCRIPTOR_HPP_
   8
   9 #include <boost/winapi/basic_types.hpp>
  10 #include <boost/winapi/handles.hpp>
  11 #include <boost/winapi/file_management.hpp>
  12 #include <string>
  13 #include <boost/filesystem/path.hpp>
  14
  15 namespace boost { namespace process { namespace detail { namespace windows {
  16
  17 struct file_descriptor
  18 {
  19     enum mode_t
  20     {
  21         read  = 1,
  22         write = 2,
  23         read_write = 3
  24     };
  25     static ::boost::winapi::DWORD_ desired_access(mode_t mode)
  26     {
  27         switch(mode)
  28         {
  29         case read:
  30             return ::boost::winapi::GENERIC_READ_;
  31         case write:
  32             return ::boost::winapi::GENERIC_WRITE_;
  33         case read_write:
  34             return ::boost::winapi::GENERIC_READ_
  35                  | ::boost::winapi::GENERIC_WRITE_;
  36         default:
  37             return 0u;
  38         }
  39     }
  40
  41     file_descriptor() = default;
  42     file_descriptor(const boost::filesystem::path& p, mode_t mode = read_write)
  43         : file_descriptor(p.native(), mode)
  44     {
  45     }
  46
  47     file_descriptor(const std::string & path , mode_t mode = read_write)
  48         : file_descriptor(path.c_str(), mode) {}
  49     file_descriptor(const std::wstring & path, mode_t mode = read_write)
  50         : file_descriptor(path.c_str(), mode) {}
  51
  52     file_descriptor(const char*    path, mode_t mode = read_write)
  53         : _handle(
  54                 ::boost::winapi::create_file(
  55                         path,
  56                         desired_access(mode),
  57                         ::boost::winapi::FILE_SHARE_READ_ |
  58                         ::boost::winapi::FILE_SHARE_WRITE_,
  59                         nullptr,
  60                         ::boost::winapi::OPEN_ALWAYS_,
  61
  62                         ::boost::winapi::FILE_ATTRIBUTE_NORMAL_,
  63                         nullptr
  64                 ))
  65     {
  66
  67     }
  68     file_descriptor(const wchar_t * path, mode_t mode = read_write)
  69         : _handle(
  70             ::boost::winapi::create_file(
  71                     path,
  72                     desired_access(mode),
  73                     ::boost::winapi::FILE_SHARE_READ_ |
  74                     ::boost::winapi::FILE_SHARE_WRITE_,
  75                     nullptr,
  76                     ::boost::winapi::OPEN_ALWAYS_,
  77
  78                     ::boost::winapi::FILE_ATTRIBUTE_NORMAL_,
  79                     nullptr
  80             ))
  81 {
  82
  83 }
  84     file_descriptor(const file_descriptor & ) = delete;
  85     file_descriptor(file_descriptor && ) = default;
  86
  87     file_descriptor& operator=(const file_descriptor & ) = delete;
  88     file_descriptor& operator=(file_descriptor && ) = default;
  89
  90     ~file_descriptor()
  91     {
  92         if (_handle != ::boost::winapi::INVALID_HANDLE_VALUE_)
  93             ::boost::winapi::CloseHandle(_handle);
  94     }
  95
  96     ::boost::winapi::HANDLE_ handle() const { return _handle;}
  97
  98 private:
  99     ::boost::winapi::HANDLE_ _handle = ::boost::winapi::INVALID_HANDLE_VALUE_;
 100 };
 101
 102 }}}}
 103
 104 #endif /* BOOST_PROCESS_DETAIL_WINDOWS_FILE_DESCRIPTOR_HPP_ */