| ////////////////////////////////////////////////////////////////////////////// |
| // |
| // (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_EXTERNAL_BUFFER_HPP |
| #define BOOST_INTERPROCESS_MANAGED_EXTERNAL_BUFFER_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/creation_tags.hpp> |
| #include <boost/interprocess/detail/managed_memory_impl.hpp> |
| #include <boost/interprocess/detail/move.hpp> |
| #include <boost/assert.hpp> |
| |
| //!\file |
| //!Describes a named user memory allocation user class. |
| |
| namespace boost { |
| namespace interprocess { |
| |
| //!A basic user memory named object creation class. Inherits all |
| //!basic functionality from |
| //!basic_managed_memory_impl<CharType, AllocationAlgorithm, IndexType>*/ |
| template |
| < |
| class CharType, |
| class AllocationAlgorithm, |
| template<class IndexConfig> class IndexType |
| > |
| class basic_managed_external_buffer |
| : public detail::basic_managed_memory_impl <CharType, AllocationAlgorithm, IndexType> |
| { |
| /// @cond |
| typedef detail::basic_managed_memory_impl |
| <CharType, AllocationAlgorithm, IndexType> base_t; |
| BOOST_INTERPROCESS_MOVABLE_BUT_NOT_COPYABLE(basic_managed_external_buffer) |
| /// @endcond |
| |
| public: |
| |
| //!Default constructor. Does nothing. |
| //!Useful in combination with move semantics |
| basic_managed_external_buffer() |
| {} |
| |
| //!Creates and places the segment manager. This can throw |
| basic_managed_external_buffer |
| (create_only_t, void *addr, std::size_t size) |
| { |
| //Check if alignment is correct |
| BOOST_ASSERT((0 == (((std::size_t)addr) & (AllocationAlgorithm::Alignment - std::size_t(1u))))); |
| if(!base_t::create_impl(addr, size)){ |
| throw interprocess_exception("Could not initialize buffer in basic_managed_external_buffer constructor"); |
| } |
| } |
| |
| //!Creates and places the segment manager. This can throw |
| basic_managed_external_buffer |
| (open_only_t, void *addr, std::size_t size) |
| { |
| //Check if alignment is correct |
| BOOST_ASSERT((0 == (((std::size_t)addr) & (AllocationAlgorithm::Alignment - std::size_t(1u))))); |
| if(!base_t::open_impl(addr, size)){ |
| throw interprocess_exception("Could not initialize buffer in basic_managed_external_buffer constructor"); |
| } |
| } |
| |
| //!Moves the ownership of "moved"'s managed memory to *this. Does not throw |
| basic_managed_external_buffer(BOOST_INTERPROCESS_RV_REF(basic_managed_external_buffer) moved) |
| { |
| this->swap(moved); |
| } |
| |
| //!Moves the ownership of "moved"'s managed memory to *this. Does not throw |
| basic_managed_external_buffer &operator=(BOOST_INTERPROCESS_RV_REF(basic_managed_external_buffer) moved) |
| { |
| basic_managed_external_buffer tmp(boost::interprocess::move(moved)); |
| this->swap(tmp); |
| return *this; |
| } |
| |
| void grow(std::size_t extra_bytes) |
| { base_t::grow(extra_bytes); } |
| |
| //!Swaps the ownership of the managed heap memories managed by *this and other. |
| //!Never throws. |
| void swap(basic_managed_external_buffer &other) |
| { base_t::swap(other); } |
| }; |
| |
| } //namespace interprocess { |
| } //namespace boost { |
| |
| #include <boost/interprocess/detail/config_end.hpp> |
| |
| #endif //BOOST_INTERPROCESS_MANAGED_EXTERNAL_BUFFER_HPP |
| |