| ////////////////////////////////////////////////////////////////////////////// |
| // |
| // (C) Copyright Ion Gaztanaga 2005-2009. 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/interprocess/detail/move.hpp> |
| |
| namespace boost { |
| namespace interprocess { |
| |
| //!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 detail::basic_managed_memory_impl |
| <CharType, AllocationAlgorithm, IndexType |
| ,detail::managed_open_or_create_impl<windows_shared_memory>::ManagedOpenOrCreateUserOffset> |
| { |
| /// @cond |
| private: |
| typedef detail::basic_managed_memory_impl |
| <CharType, AllocationAlgorithm, IndexType, |
| detail::managed_open_or_create_impl<windows_shared_memory>::ManagedOpenOrCreateUserOffset> base_t; |
| typedef detail::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_INTERPROCESS_MOVABLE_BUT_NOT_COPYABLE(basic_managed_windows_shared_memory) |
| /// @endcond |
| |
| public: //functions |
| |
| //!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 create_only, const char *name, |
| std::size_t 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(), detail::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 open_or_create, |
| const char *name, std::size_t 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(), |
| detail::DoOpenOrCreate), perm) |
| {} |
| |
| //!Connects to a created shared memory and its segment manager. |
| //!This can throw. |
| basic_managed_windows_shared_memory |
| (open_only_t open_only, const char* name, const void *addr = 0) |
| : m_wshm(open_only, name, read_write, addr, |
| create_open_func_t(get_this_pointer(), |
| detail::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(), detail::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(), detail::DoOpen)) |
| {} |
| |
| //!Moves the ownership of "moved"'s managed memory to *this. |
| //!Does not throw |
| basic_managed_windows_shared_memory |
| (BOOST_INTERPROCESS_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_INTERPROCESS_RV_REF(basic_managed_windows_shared_memory) moved) |
| { |
| basic_managed_windows_shared_memory tmp(boost::interprocess::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*, std::size_t> 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: |
| detail::managed_open_or_create_impl<windows_shared_memory, false> m_wshm; |
| /// @endcond |
| }; |
| |
| } //namespace interprocess { |
| } //namespace boost { |
| |
| #include <boost/interprocess/detail/config_end.hpp> |
| |
| #endif //BOOST_INTERPROCESS_MANAGED_WINDOWS_SHARED_MEMORY_HPP |