| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // (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_ALLOCATOR_V1_HPP |
| #define BOOST_INTERPROCESS_ALLOCATOR_V1_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/pointer_to_other.hpp> |
| |
| #include <boost/interprocess/interprocess_fwd.hpp> |
| #include <boost/interprocess/containers/allocation_type.hpp> |
| #include <boost/interprocess/detail/utilities.hpp> |
| #include <boost/interprocess/containers/version_type.hpp> |
| #include <boost/interprocess/exceptions.hpp> |
| #include <memory> |
| #include <algorithm> |
| #include <cstddef> |
| #include <stdexcept> |
| |
| //!\file |
| //!Describes an allocator_v1 that allocates portions of fixed size |
| //!memory buffer (shared memory, mapped file...) |
| |
| namespace boost { |
| namespace interprocess { |
| namespace test { |
| |
| //!An STL compatible allocator_v1 that uses a segment manager as |
| //!memory source. The internal pointer type will of the same type (raw, smart) as |
| //!"typename SegmentManager::void_pointer" type. This allows |
| //!placing the allocator_v1 in shared memory, memory mapped-files, etc...*/ |
| template<class T, class SegmentManager> |
| class allocator_v1 |
| { |
| private: |
| typedef allocator_v1<T, SegmentManager> self_t; |
| typedef SegmentManager segment_manager; |
| typedef typename segment_manager::void_pointer aux_pointer_t; |
| |
| typedef typename |
| boost::pointer_to_other |
| <aux_pointer_t, const void>::type cvoid_ptr; |
| |
| typedef typename boost::pointer_to_other |
| <cvoid_ptr, segment_manager>::type alloc_ptr_t; |
| |
| template<class T2, class SegmentManager2> |
| allocator_v1& operator=(const allocator_v1<T2, SegmentManager2>&); |
| |
| allocator_v1& operator=(const allocator_v1&); |
| |
| alloc_ptr_t mp_mngr; |
| |
| public: |
| typedef T value_type; |
| typedef typename boost::pointer_to_other |
| <cvoid_ptr, T>::type pointer; |
| typedef typename boost:: |
| pointer_to_other<pointer, const T>::type const_pointer; |
| typedef typename detail::add_reference |
| <value_type>::type reference; |
| typedef typename detail::add_reference |
| <const value_type>::type const_reference; |
| typedef std::size_t size_type; |
| typedef std::ptrdiff_t difference_type; |
| |
| //!Obtains an allocator_v1 of other type |
| template<class T2> |
| struct rebind |
| { |
| typedef allocator_v1<T2, SegmentManager> other; |
| }; |
| |
| //!Returns the segment manager. Never throws |
| segment_manager* get_segment_manager()const |
| { return detail::get_pointer(mp_mngr); } |
| /* |
| //!Returns address of mutable object. Never throws |
| pointer address(reference value) const |
| { return pointer(addressof(value)); } |
| |
| //!Returns address of non mutable object. Never throws |
| const_pointer address(const_reference value) const |
| { return const_pointer(addressof(value)); } |
| */ |
| //!Constructor from the segment manager. Never throws |
| allocator_v1(segment_manager *segment_mngr) |
| : mp_mngr(segment_mngr) { } |
| |
| //!Constructor from other allocator_v1. Never throws |
| allocator_v1(const allocator_v1 &other) |
| : mp_mngr(other.get_segment_manager()){ } |
| |
| //!Constructor from related allocator_v1. Never throws |
| template<class T2> |
| allocator_v1(const allocator_v1<T2, SegmentManager> &other) |
| : mp_mngr(other.get_segment_manager()){} |
| |
| //!Allocates memory for an array of count elements. |
| //!Throws boost::interprocess::bad_alloc if there is no enough memory |
| pointer allocate(size_type count, cvoid_ptr hint = 0) |
| { (void)hint; return pointer(static_cast<value_type*>(mp_mngr->allocate(count*sizeof(value_type)))); } |
| |
| //!Deallocates memory previously allocated. Never throws |
| void deallocate(const pointer &ptr, size_type) |
| { mp_mngr->deallocate((void*)detail::get_pointer(ptr)); } |
| |
| //!Construct object, calling constructor. |
| //!Throws if T(const T&) throws |
| void construct(const pointer &ptr, const_reference value) |
| { new((void*)detail::get_pointer(ptr)) value_type(value); } |
| |
| //!Destroys object. Throws if object's destructor throws |
| void destroy(const pointer &ptr) |
| { BOOST_ASSERT(ptr != 0); (*ptr).~value_type(); } |
| |
| //!Returns the number of elements that could be allocated. Never throws |
| size_type max_size() const |
| { return mp_mngr->get_size(); } |
| |
| //!Swap segment manager. Does not throw. If each allocator_v1 is placed in |
| //!different memory segments, the result is undefined. |
| friend void swap(self_t &alloc1, self_t &alloc2) |
| { detail::do_swap(alloc1.mp_mngr, alloc2.mp_mngr); } |
| }; |
| |
| //!Equality test for same type of allocator_v1 |
| template<class T, class SegmentManager> inline |
| bool operator==(const allocator_v1<T , SegmentManager> &alloc1, |
| const allocator_v1<T, SegmentManager> &alloc2) |
| { return alloc1.get_segment_manager() == alloc2.get_segment_manager(); } |
| |
| //!Inequality test for same type of allocator_v1 |
| template<class T, class SegmentManager> inline |
| bool operator!=(const allocator_v1<T, SegmentManager> &alloc1, |
| const allocator_v1<T, SegmentManager> &alloc2) |
| { return alloc1.get_segment_manager() != alloc2.get_segment_manager(); } |
| |
| } //namespace test { |
| } //namespace interprocess { |
| } //namespace boost { |
| |
| #include <boost/interprocess/detail/config_end.hpp> |
| |
| #endif //BOOST_INTERPROCESS_ALLOCATOR_V1_HPP |
| |