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Diffstat (limited to 'src/third_party/boost-1.60.0/boost/interprocess/allocators/allocator.hpp')
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diff --git a/src/third_party/boost-1.60.0/boost/interprocess/allocators/allocator.hpp b/src/third_party/boost-1.60.0/boost/interprocess/allocators/allocator.hpp new file mode 100644 index 00000000000..759e3d2605a --- /dev/null +++ b/src/third_party/boost-1.60.0/boost/interprocess/allocators/allocator.hpp @@ -0,0 +1,307 @@ +/////////////////////////////////////////////////////////////////////////////// +// +// (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_ALLOCATOR_HPP +#define BOOST_INTERPROCESS_ALLOCATOR_HPP + +#ifndef BOOST_CONFIG_HPP +# include <boost/config.hpp> +#endif +# +#if defined(BOOST_HAS_PRAGMA_ONCE) +# pragma once +#endif + +#include <boost/interprocess/detail/config_begin.hpp> +#include <boost/interprocess/detail/workaround.hpp> + +#include <boost/intrusive/pointer_traits.hpp> + +#include <boost/interprocess/interprocess_fwd.hpp> +#include <boost/interprocess/containers/allocation_type.hpp> +#include <boost/container/detail/multiallocation_chain.hpp> +#include <boost/interprocess/allocators/detail/allocator_common.hpp> +#include <boost/interprocess/detail/utilities.hpp> +#include <boost/interprocess/containers/version_type.hpp> +#include <boost/interprocess/exceptions.hpp> +#include <boost/assert.hpp> +#include <boost/utility/addressof.hpp> +#include <boost/interprocess/detail/type_traits.hpp> +#include <boost/container/detail/placement_new.hpp> + +#include <cstddef> +#include <stdexcept> + +//!\file +//!Describes an allocator that allocates portions of fixed size +//!memory buffer (shared memory, mapped file...) + +namespace boost { +namespace interprocess { + + +//!An STL compatible allocator 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 in shared memory, memory mapped-files, etc... +template<class T, class SegmentManager> +class allocator +{ + public: + //Segment manager + typedef SegmentManager segment_manager; + typedef typename SegmentManager::void_pointer void_pointer; + + #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) + private: + + //Self type + typedef allocator<T, SegmentManager> self_t; + + //Pointer to void + typedef typename segment_manager::void_pointer aux_pointer_t; + + //Typedef to const void pointer + typedef typename boost::intrusive:: + pointer_traits<aux_pointer_t>::template + rebind_pointer<const void>::type cvoid_ptr; + + //Pointer to the allocator + typedef typename boost::intrusive:: + pointer_traits<cvoid_ptr>::template + rebind_pointer<segment_manager>::type alloc_ptr_t; + + //Not assignable from related allocator + template<class T2, class SegmentManager2> + allocator& operator=(const allocator<T2, SegmentManager2>&); + + //Not assignable from other allocator + allocator& operator=(const allocator&); + + //Pointer to the allocator + alloc_ptr_t mp_mngr; + #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED + + public: + typedef T value_type; + typedef typename boost::intrusive:: + pointer_traits<cvoid_ptr>::template + rebind_pointer<T>::type pointer; + typedef typename boost::intrusive:: + pointer_traits<pointer>::template + rebind_pointer<const T>::type const_pointer; + typedef typename ipcdetail::add_reference + <value_type>::type reference; + typedef typename ipcdetail::add_reference + <const value_type>::type const_reference; + typedef typename segment_manager::size_type size_type; + typedef typename segment_manager::difference_type difference_type; + + typedef boost::interprocess::version_type<allocator, 2> version; + + #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) + + //Experimental. Don't use. + typedef boost::container::container_detail::transform_multiallocation_chain + <typename SegmentManager::multiallocation_chain, T>multiallocation_chain; + #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED + + //!Obtains an allocator that allocates + //!objects of type T2 + template<class T2> + struct rebind + { + typedef allocator<T2, SegmentManager> other; + }; + + //!Returns the segment manager. + //!Never throws + segment_manager* get_segment_manager()const + { return ipcdetail::to_raw_pointer(mp_mngr); } + + //!Constructor from the segment manager. + //!Never throws + allocator(segment_manager *segment_mngr) + : mp_mngr(segment_mngr) { } + + //!Constructor from other allocator. + //!Never throws + allocator(const allocator &other) + : mp_mngr(other.get_segment_manager()){ } + + //!Constructor from related allocator. + //!Never throws + template<class T2> + allocator(const allocator<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; + if(size_overflows<sizeof(T)>(count)){ + throw bad_alloc(); + } + return pointer(static_cast<value_type*>(mp_mngr->allocate(count*sizeof(T)))); + } + + //!Deallocates memory previously allocated. + //!Never throws + void deallocate(const pointer &ptr, size_type) + { mp_mngr->deallocate((void*)ipcdetail::to_raw_pointer(ptr)); } + + //!Returns the number of elements that could be allocated. + //!Never throws + size_type max_size() const + { return mp_mngr->get_size()/sizeof(T); } + + //!Swap segment manager. Does not throw. If each allocator is placed in + //!different memory segments, the result is undefined. + friend void swap(self_t &alloc1, self_t &alloc2) + { boost::adl_move_swap(alloc1.mp_mngr, alloc2.mp_mngr); } + + //!Returns maximum the number of objects the previously allocated memory + //!pointed by p can hold. This size only works for memory allocated with + //!allocate, allocation_command and allocate_many. + size_type size(const pointer &p) const + { + return (size_type)mp_mngr->size(ipcdetail::to_raw_pointer(p))/sizeof(T); + } + + pointer allocation_command(boost::interprocess::allocation_type command, + size_type limit_size, size_type &prefer_in_recvd_out_size, pointer &reuse) + { + value_type *reuse_raw = ipcdetail::to_raw_pointer(reuse); + pointer const p = mp_mngr->allocation_command(command, limit_size, prefer_in_recvd_out_size, reuse_raw); + reuse = reuse_raw; + return p; + } + + //!Allocates many elements of size elem_size in a contiguous block + //!of memory. The minimum number to be allocated is min_elements, + //!the preferred and maximum number is + //!preferred_elements. The number of actually allocated elements is + //!will be assigned to received_size. The elements must be deallocated + //!with deallocate(...) + void allocate_many(size_type elem_size, size_type num_elements, multiallocation_chain &chain) + { + if(size_overflows<sizeof(T)>(elem_size)){ + throw bad_alloc(); + } + mp_mngr->allocate_many(elem_size*sizeof(T), num_elements, chain); + } + + //!Allocates n_elements elements, each one of size elem_sizes[i]in a + //!contiguous block + //!of memory. The elements must be deallocated + void allocate_many(const size_type *elem_sizes, size_type n_elements, multiallocation_chain &chain) + { + mp_mngr->allocate_many(elem_sizes, n_elements, sizeof(T), chain); + } + + //!Allocates many elements of size elem_size in a contiguous block + //!of memory. The minimum number to be allocated is min_elements, + //!the preferred and maximum number is + //!preferred_elements. The number of actually allocated elements is + //!will be assigned to received_size. The elements must be deallocated + //!with deallocate(...) + void deallocate_many(multiallocation_chain &chain) + { mp_mngr->deallocate_many(chain); } + + //!Allocates just one object. Memory allocated with this function + //!must be deallocated only with deallocate_one(). + //!Throws boost::interprocess::bad_alloc if there is no enough memory + pointer allocate_one() + { return this->allocate(1); } + + //!Allocates many elements of size == 1 in a contiguous block + //!of memory. The minimum number to be allocated is min_elements, + //!the preferred and maximum number is + //!preferred_elements. The number of actually allocated elements is + //!will be assigned to received_size. Memory allocated with this function + //!must be deallocated only with deallocate_one(). + void allocate_individual(size_type num_elements, multiallocation_chain &chain) + { this->allocate_many(1, num_elements, chain); } + + //!Deallocates memory previously allocated with allocate_one(). + //!You should never use deallocate_one to deallocate memory allocated + //!with other functions different from allocate_one(). Never throws + void deallocate_one(const pointer &p) + { return this->deallocate(p, 1); } + + //!Allocates many elements of size == 1 in a contiguous block + //!of memory. The minimum number to be allocated is min_elements, + //!the preferred and maximum number is + //!preferred_elements. The number of actually allocated elements is + //!will be assigned to received_size. Memory allocated with this function + //!must be deallocated only with deallocate_one(). + void deallocate_individual(multiallocation_chain &chain) + { this->deallocate_many(chain); } + + //!Returns address of mutable object. + //!Never throws + pointer address(reference value) const + { return pointer(boost::addressof(value)); } + + //!Returns address of non mutable object. + //!Never throws + const_pointer address(const_reference value) const + { return const_pointer(boost::addressof(value)); } + + //!Constructs an object + //!Throws if T's constructor throws + //!For backwards compatibility with libraries using C++03 allocators + template<class P> + void construct(const pointer &ptr, BOOST_FWD_REF(P) p) + { ::new((void*)ipcdetail::to_raw_pointer(ptr), boost_container_new_t()) value_type(::boost::forward<P>(p)); } + + //!Destroys object. Throws if object's + //!destructor throws + void destroy(const pointer &ptr) + { BOOST_ASSERT(ptr != 0); (*ptr).~value_type(); } + +}; + +//!Equality test for same type +//!of allocator +template<class T, class SegmentManager> inline +bool operator==(const allocator<T , SegmentManager> &alloc1, + const allocator<T, SegmentManager> &alloc2) + { return alloc1.get_segment_manager() == alloc2.get_segment_manager(); } + +//!Inequality test for same type +//!of allocator +template<class T, class SegmentManager> inline +bool operator!=(const allocator<T, SegmentManager> &alloc1, + const allocator<T, SegmentManager> &alloc2) + { return alloc1.get_segment_manager() != alloc2.get_segment_manager(); } + +} //namespace interprocess { + +#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) + +template<class T> +struct has_trivial_destructor; + +template<class T, class SegmentManager> +struct has_trivial_destructor + <boost::interprocess::allocator <T, SegmentManager> > +{ + static const bool value = true; +}; +#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED + +} //namespace boost { + +#include <boost/interprocess/detail/config_end.hpp> + +#endif //BOOST_INTERPROCESS_ALLOCATOR_HPP + |