interprocess/detail/managed_global_memory.hpp

0001 //////////////////////////////////////////////////////////////////////////////
0002 //
0003 // (C) Copyright Ion Gaztanaga 2009-2012. Distributed under the Boost
0004 // Software License, Version 1.0. (See accompanying file
0005 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 //
0007 // See http://www.boost.org/libs/interprocess for documentation.
0008 //
0009 //////////////////////////////////////////////////////////////////////////////
0010
0011 #ifndef BOOST_INTERPROCESS_BASIC_GLOBAL_MEMORY_HPP
0012 #define BOOST_INTERPROCESS_BASIC_GLOBAL_MEMORY_HPP
0013
0014 #ifndef BOOST_CONFIG_HPP
0015 #  include <boost/config.hpp>
0016 #endif
0017 0018 ">#
0019 #if defined(BOOST_HAS_PRAGMA_ONCE)
0020 #pragma once
0021 #endif
0022
0023 #include <boost/interprocess/detail/config_begin.hpp>
0024 #include <boost/interprocess/detail/workaround.hpp>
0025
0026 #include <boost/interprocess/offset_ptr.hpp>
0027 #include <boost/interprocess/sync/spin/mutex.hpp>
0028 #include <boost/interprocess/sync/spin/recursive_mutex.hpp>
0029 #include <boost/interprocess/detail/managed_memory_impl.hpp>
0030 #include <boost/interprocess/detail/managed_open_or_create_impl.hpp>
0031 #include <boost/interprocess/mem_algo/rbtree_best_fit.hpp>
0032 #include <boost/interprocess/indexes/iset_index.hpp>
0033 #include <boost/interprocess/creation_tags.hpp>
0034 #include <boost/interprocess/permissions.hpp>
0035
0036 namespace boost{
0037 namespace interprocess{
0038 namespace ipcdetail{
0039
0040 struct intermodule_singleton_mutex_family
0041 {
0042    typedef boost::interprocess::ipcdetail::spin_mutex              mutex_type;
0043    typedef boost::interprocess::ipcdetail::spin_recursive_mutex    recursive_mutex_type;
0044 };
0045
0046 struct intermodule_types
0047 {
0048    //We must use offset_ptr since a loaded DLL can map the singleton holder shared memory
0049    //at a different address than other DLLs or the main executable
0050    typedef rbtree_best_fit<intermodule_singleton_mutex_family, offset_ptr<void> > mem_algo;
0051    template<class Device, bool FileBased>
0052    struct open_or_create
0053    {
0054       typedef managed_open_or_create_impl
0055             <Device, mem_algo::Alignment, FileBased, false> type;
0056    };
0057 };
0058
0059 //we must implement our own managed shared memory to avoid circular dependencies
0060 template<class Device, bool FileBased>
0061 class basic_managed_global_memory
0062    : public basic_managed_memory_impl
0063       < char
0064       , intermodule_types::mem_algo
0065       , iset_index
0066       , intermodule_types::open_or_create<Device, FileBased>::type::ManagedOpenOrCreateUserOffset
0067       >
0068    , private intermodule_types::open_or_create<Device, FileBased>::type
0069 {
0070    #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
0071    typedef typename intermodule_types::template open_or_create<Device, FileBased>::type base2_t;
0072
0073    typedef basic_managed_memory_impl
0074       < char
0075       , intermodule_types::mem_algo
0076       , iset_index
0077       , base2_t::ManagedOpenOrCreateUserOffset
0078       > base_t;
0079
0080    typedef create_open_func<base_t>        create_open_func_t;
0081
0082    basic_managed_global_memory *get_this_pointer()
0083    {  return this;   }
0084
0085    public:
0086    typedef typename base_t::size_type              size_type;
0087
0088    private:
0089    typedef typename base_t::char_ptr_holder_t   char_ptr_holder_t;
0090    BOOST_MOVABLE_BUT_NOT_COPYABLE(basic_managed_global_memory)
0091    #endif   //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
0092
0093    public: //functions
0094
0095    basic_managed_global_memory (open_or_create_t,
0096                               const char *name, size_type size,
0097                               const void *addr = 0, const permissions& perm = permissions())
0098       : base_t()
0099       , base2_t(open_or_create_t(), name, size, read_write, addr,
0100                 create_open_func_t(get_this_pointer(),
0101                 DoOpenOrCreate), perm)
0102    {}
0103
0104    basic_managed_global_memory (open_only_t , const char* name,
0105                                 const void *addr = 0)
0106       : base_t()
0107       , base2_t(open_only_t(), name, read_write, addr,
0108                 create_open_func_t(get_this_pointer(),
0109                 DoOpen))
0110    {}
0111 };
0112
0113
0114 }  //namespace ipcdetail{
0115 }  //namespace interprocess{
0116 }  //namespace boost{
0117
0118 #include <boost/interprocess/detail/config_end.hpp>
0119
0120 #endif   //#ifndef BOOST_INTERPROCESS_BASIC_GLOBAL_MEMORY_HPP