ceph/src/boost/libs/interprocess/include/boost/interprocess/permissions.hpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
   4 // Software License, Version 1.0. (See accompanying file
   5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // See http://www.boost.org/libs/interprocess for documentation.
   8 //
   9 //////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef BOOST_INTERPROCESS_PERMISSIONS_HPP
  12 #define BOOST_INTERPROCESS_PERMISSIONS_HPP
  13
  14 #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
  15
  16 #ifndef BOOST_CONFIG_HPP
  17 #  include <boost/config.hpp>
  18 #endif
  19 #
  20 #if defined(BOOST_HAS_PRAGMA_ONCE)
  21 #  pragma once
  22 #endif
  23
  24 #include <boost/interprocess/detail/config_begin.hpp>
  25 #include <boost/interprocess/detail/workaround.hpp>
  26 #include <boost/interprocess/interprocess_fwd.hpp>
  27
  28 #if defined(BOOST_INTERPROCESS_WINDOWS)
  29
  30 #include <boost/interprocess/detail/win32_api.hpp>
  31
  32 #endif
  33
  34 #endif   //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
  35
  36 //!\file
  37 //!Describes permissions class
  38
  39 namespace boost {
  40 namespace interprocess {
  41
  42 #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
  43
  44 #if defined(BOOST_INTERPROCESS_WINDOWS)
  45
  46 namespace ipcdetail {
  47
  48 template <int Dummy>
  49 struct unrestricted_permissions_holder
  50 {
  51    static winapi::interprocess_all_access_security unrestricted;
  52 };
  53
  54 template<int Dummy>
  55 winapi::interprocess_all_access_security unrestricted_permissions_holder<Dummy>::unrestricted;
  56
  57 }  //namespace ipcdetail {
  58
  59 #endif   //defined BOOST_INTERPROCESS_WINDOWS
  60
  61 #endif   //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
  62
  63 //!The permissions class represents permissions to be set to shared memory or
  64 //!files, that can be constructed form usual permission representations:
  65 //!a SECURITY_ATTRIBUTES pointer in windows or ORed rwx chmod integer in UNIX.
  66 class permissions
  67 {
  68    #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
  69
  70    #if defined(BOOST_INTERPROCESS_WINDOWS)
  71    typedef void*  os_permissions_type;
  72    #else
  73    typedef int    os_permissions_type;
  74    #endif
  75    os_permissions_type  m_perm;
  76
  77    #endif   //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
  78
  79    public:
  80    //!Constructs a permissions object from a user provided os-dependent
  81    //!permissions.
  82    permissions(os_permissions_type type)
  83       : m_perm(type)
  84    {}
  85
  86    //!Constructs a default permissions object:
  87    //!A null security attributes pointer for windows or 0644
  88    //!for UNIX.
  89    permissions()
  90    {  set_default(); }
  91
  92    //!Sets permissions to default values:
  93    //!A null security attributes pointer for windows or 0644
  94    //!for UNIX.
  95    void set_default()
  96    {
  97       #if defined (BOOST_INTERPROCESS_WINDOWS)
  98       m_perm = 0;
  99       #else
 100       m_perm = 0644;
 101       #endif
 102    }
 103
 104    //!Sets permissions to unrestricted access:
 105    //!A null DACL for windows or 0666 for UNIX.
 106    void set_unrestricted()
 107    {
 108       #if defined (BOOST_INTERPROCESS_WINDOWS)
 109       m_perm = &ipcdetail::unrestricted_permissions_holder<0>::unrestricted;
 110       #else
 111       m_perm = 0666;
 112       #endif
 113    }
 114
 115    //!Sets permissions from a user provided os-dependent
 116    //!permissions.
 117    void set_permissions(os_permissions_type perm)
 118    {  m_perm = perm; }
 119
 120    //!Returns stored os-dependent
 121    //!permissions
 122    os_permissions_type get_permissions() const
 123    {  return m_perm; }
 124 };
 125
 126 }  //namespace interprocess {
 127 }  //namespace boost {
 128
 129 #include <boost/interprocess/detail/config_end.hpp>
 130
 131 #endif   //BOOST_INTERPROCESS_PERMISSIONS_HPP
 132