boost/interprocess/managed_windows_shared_memory.hpp
////////////////////////////////////////////////////////////////////////////// // // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost // Software License, Version 1.0. (See accompanying file // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/interprocess for documentation. // ////////////////////////////////////////////////////////////////////////////// #ifndef BOOST_INTERPROCESS_MANAGED_WINDOWS_SHARED_MEMORY_HPP #define BOOST_INTERPROCESS_MANAGED_WINDOWS_SHARED_MEMORY_HPP #if (defined _MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif #include <boost/interprocess/detail/config_begin.hpp> #include <boost/interprocess/detail/workaround.hpp> #include <boost/interprocess/detail/managed_open_or_create_impl.hpp> #include <boost/interprocess/detail/managed_memory_impl.hpp> #include <boost/interprocess/creation_tags.hpp> #include <boost/interprocess/windows_shared_memory.hpp> #include <boost/interprocess/permissions.hpp> #include <boost/move/move.hpp> //These includes needed to fulfill default template parameters of //predeclarations in interprocess_fwd.hpp #include <boost/interprocess/mem_algo/rbtree_best_fit.hpp> #include <boost/interprocess/sync/mutex_family.hpp> #include <boost/interprocess/indexes/iset_index.hpp> namespace boost { namespace interprocess { namespace ipcdetail { template<class AllocationAlgorithm> struct wshmem_open_or_create { typedef ipcdetail::managed_open_or_create_impl < windows_shared_memory, AllocationAlgorithm::Alignment, false, false> type; }; } //namespace ipcdetail { //!A basic managed windows shared memory creation class. Initializes the //!shared memory segment. Inherits all basic functionality from //!basic_managed_memory_impl<CharType, AllocationAlgorithm, IndexType> //!Unlike basic_managed_shared_memory, it has //!no kernel persistence and the shared memory is destroyed //!when all processes destroy all their windows_shared_memory //!objects and mapped regions for the same shared memory //!or the processes end/crash. //! //!Warning: basic_managed_windows_shared_memory and //!basic_managed_shared_memory can't communicate between them. template < class CharType, class AllocationAlgorithm, template<class IndexConfig> class IndexType > class basic_managed_windows_shared_memory : public ipcdetail::basic_managed_memory_impl < CharType, AllocationAlgorithm, IndexType , ipcdetail::wshmem_open_or_create<AllocationAlgorithm>::type::ManagedOpenOrCreateUserOffset> { /// @cond private: typedef ipcdetail::basic_managed_memory_impl <CharType, AllocationAlgorithm, IndexType, ipcdetail::wshmem_open_or_create<AllocationAlgorithm>::type::ManagedOpenOrCreateUserOffset> base_t; typedef ipcdetail::create_open_func<base_t> create_open_func_t; basic_managed_windows_shared_memory *get_this_pointer() { return this; } private: typedef typename base_t::char_ptr_holder_t char_ptr_holder_t; BOOST_MOVABLE_BUT_NOT_COPYABLE(basic_managed_windows_shared_memory) /// @endcond public: //functions typedef typename base_t::size_type size_type; //!Default constructor. Does nothing. //!Useful in combination with move semantics basic_managed_windows_shared_memory() {} //!Creates shared memory and creates and places the segment manager. //!This can throw. basic_managed_windows_shared_memory (create_only_t, const char *name, size_type size, const void *addr = 0, const permissions &perm = permissions()) : m_wshm(create_only, name, size, read_write, addr, create_open_func_t(get_this_pointer(), ipcdetail::DoCreate), perm) {} //!Creates shared memory and creates and places the segment manager if //!segment was not created. If segment was created it connects to the //!segment. //!This can throw. basic_managed_windows_shared_memory (open_or_create_t, const char *name, size_type size, const void *addr = 0, const permissions &perm = permissions()) : m_wshm(open_or_create, name, size, read_write, addr, create_open_func_t(get_this_pointer(), ipcdetail::DoOpenOrCreate), perm) {} //!Connects to a created shared memory and its segment manager. //!This can throw. basic_managed_windows_shared_memory (open_only_t, const char* name, const void *addr = 0) : m_wshm(open_only, name, read_write, addr, create_open_func_t(get_this_pointer(), ipcdetail::DoOpen)) {} //!Connects to a created shared memory and its segment manager //!in copy_on_write mode. //!This can throw. basic_managed_windows_shared_memory (open_copy_on_write_t, const char* name, const void *addr = 0) : m_wshm(open_only, name, copy_on_write, addr, create_open_func_t(get_this_pointer(), ipcdetail::DoOpen)) {} //!Connects to a created shared memory and its segment manager //!in read-only mode. //!This can throw. basic_managed_windows_shared_memory (open_read_only_t, const char* name, const void *addr = 0) : base_t() , m_wshm(open_only, name, read_only, addr, create_open_func_t(get_this_pointer(), ipcdetail::DoOpen)) {} //!Moves the ownership of "moved"'s managed memory to *this. //!Does not throw basic_managed_windows_shared_memory (BOOST_RV_REF(basic_managed_windows_shared_memory) moved) { this->swap(moved); } //!Moves the ownership of "moved"'s managed memory to *this. //!Does not throw basic_managed_windows_shared_memory &operator=(BOOST_RV_REF(basic_managed_windows_shared_memory) moved) { basic_managed_windows_shared_memory tmp(boost::move(moved)); this->swap(tmp); return *this; } //!Destroys *this and indicates that the calling process is finished using //!the resource. All mapped regions are still valid after //!destruction. When all mapped regions and basic_managed_windows_shared_memory //!objects referring the shared memory are destroyed, the //!operating system will destroy the shared memory. ~basic_managed_windows_shared_memory() {} //!Swaps the ownership of the managed mapped memories managed by *this and other. //!Never throws. void swap(basic_managed_windows_shared_memory &other) { base_t::swap(other); m_wshm.swap(other.m_wshm); } /// @cond //!Tries to find a previous named allocation address. Returns a memory //!buffer and the object count. If not found returned pointer is 0. //!Never throws. template <class T> std::pair<T*, size_type> find (char_ptr_holder_t name) { if(m_wshm.get_mapped_region().get_mode() == read_only){ return base_t::template find_no_lock<T>(name); } else{ return base_t::template find<T>(name); } } private: typename ipcdetail::wshmem_open_or_create<AllocationAlgorithm>::type m_wshm; /// @endcond }; } //namespace interprocess { } //namespace boost { #include <boost/interprocess/detail/config_end.hpp> #endif //BOOST_INTERPROCESS_MANAGED_WINDOWS_SHARED_MEMORY_HPP