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