ceph/src/boost/libs/interprocess/include/boost/interprocess/detail/managed_global_memory.hpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2009-2012. 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_BASIC_GLOBAL_MEMORY_HPP
  12 #define BOOST_INTERPROCESS_BASIC_GLOBAL_MEMORY_HPP
  13
  14 #ifndef BOOST_CONFIG_HPP
  15 #  include <boost/config.hpp>
  16 #endif
  17 #
  18 #if defined(BOOST_HAS_PRAGMA_ONCE)
  19 #pragma once
  20 #endif
  21
  22 #include <boost/interprocess/detail/config_begin.hpp>
  23 #include <boost/interprocess/detail/workaround.hpp>
  24
  25 #include <boost/interprocess/offset_ptr.hpp>
  26 #include <boost/interprocess/sync/spin/mutex.hpp>
  27 #include <boost/interprocess/sync/spin/recursive_mutex.hpp>
  28 #include <boost/interprocess/detail/managed_memory_impl.hpp>
  29 #include <boost/interprocess/detail/managed_open_or_create_impl.hpp>
  30 #include <boost/interprocess/mem_algo/rbtree_best_fit.hpp>
  31 #include <boost/interprocess/indexes/iset_index.hpp>
  32 #include <boost/interprocess/creation_tags.hpp>
  33 #include <boost/interprocess/permissions.hpp>
  34
  35 namespace boost{
  36 namespace interprocess{
  37 namespace ipcdetail{
  38
  39 struct intermodule_singleton_mutex_family
  40 {
  41    typedef boost::interprocess::ipcdetail::spin_mutex              mutex_type;
  42    typedef boost::interprocess::ipcdetail::spin_recursive_mutex    recursive_mutex_type;
  43 };
  44
  45 struct intermodule_types
  46 {
  47    //We must use offset_ptr since a loaded DLL can map the singleton holder shared memory
  48    //at a different address than other DLLs or the main executable
  49    typedef rbtree_best_fit<intermodule_singleton_mutex_family, offset_ptr<void> > mem_algo;
  50    template<class Device, bool FileBased>
  51    struct open_or_create
  52    {
  53       typedef managed_open_or_create_impl
  54             <Device, mem_algo::Alignment, FileBased, false> type;
  55    };
  56 };
  57
  58 //we must implement our own managed shared memory to avoid circular dependencies
  59 template<class Device, bool FileBased>
  60 class basic_managed_global_memory
  61    : public basic_managed_memory_impl
  62       < char
  63       , intermodule_types::mem_algo
  64       , iset_index
  65       , intermodule_types::open_or_create<Device, FileBased>::type::ManagedOpenOrCreateUserOffset
  66       >
  67    , private intermodule_types::open_or_create<Device, FileBased>::type
  68 {
  69    #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
  70    typedef typename intermodule_types::template open_or_create<Device, FileBased>::type base2_t;
  71
  72    typedef basic_managed_memory_impl
  73       < char
  74       , intermodule_types::mem_algo
  75       , iset_index
  76       , base2_t::ManagedOpenOrCreateUserOffset
  77       > base_t;
  78
  79    typedef create_open_func<base_t>        create_open_func_t;
  80
  81    basic_managed_global_memory *get_this_pointer()
  82    {  return this;   }
  83
  84    public:
  85    typedef typename base_t::size_type              size_type;
  86
  87    private:
  88    typedef typename base_t::char_ptr_holder_t   char_ptr_holder_t;
  89    BOOST_MOVABLE_BUT_NOT_COPYABLE(basic_managed_global_memory)
  90    #endif   //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
  91
  92    public: //functions
  93
  94    basic_managed_global_memory (open_or_create_t open_or_create,
  95                               const char *name, size_type size,
  96                               const void *addr = 0, const permissions& perm = permissions())
  97       : base_t()
  98       , base2_t(open_or_create, name, size, read_write, addr,
  99                 create_open_func_t(get_this_pointer(),
 100                 DoOpenOrCreate), perm)
 101    {}
 102
 103    basic_managed_global_memory (open_only_t open_only, const char* name,
 104                                 const void *addr = 0)
 105       : base_t()
 106       , base2_t(open_only, name, read_write, addr,
 107                 create_open_func_t(get_this_pointer(),
 108                 DoOpen))
 109    {}
 110 };
 111
 112
 113 }  //namespace ipcdetail{
 114 }  //namespace interprocess{
 115 }  //namespace boost{
 116
 117 #include <boost/interprocess/detail/config_end.hpp>
 118
 119 #endif   //#ifndef BOOST_INTERPROCESS_BASIC_GLOBAL_MEMORY_HPP