08e17472e4
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@142235 91177308-0d34-0410-b5e6-96231b3b80d8
579 lines
21 KiB
C++
579 lines
21 KiB
C++
// -*- C++ -*-
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//===-------------------------- scoped_allocator --------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_SCOPED_ALLOCATOR
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#define _LIBCPP_SCOPED_ALLOCATOR
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/*
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scoped_allocator synopsis
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namespace std
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{
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template <class OuterAlloc, class... InnerAllocs>
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class scoped_allocator_adaptor : public OuterAlloc
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{
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typedef allocator_traits<OuterAlloc> OuterTraits; // exposition only
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scoped_allocator_adaptor<InnerAllocs...> inner; // exposition only
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public:
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typedef OuterAlloc outer_allocator_type;
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typedef see below inner_allocator_type;
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typedef typename OuterTraits::value_type value_type;
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typedef typename OuterTraits::size_type size_type;
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typedef typename OuterTraits::difference_type difference_type;
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typedef typename OuterTraits::pointer pointer;
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typedef typename OuterTraits::const_pointer const_pointer;
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typedef typename OuterTraits::void_pointer void_pointer;
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typedef typename OuterTraits::const_void_pointer const_void_pointer;
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typedef see below propagate_on_container_copy_assignment;
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typedef see below propagate_on_container_move_assignment;
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typedef see below propagate_on_container_swap;
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template <class Tp>
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struct rebind
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{
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typedef scoped_allocator_adaptor<
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OuterTraits::template rebind_alloc<Tp>, InnerAllocs...> other;
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};
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scoped_allocator_adaptor();
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template <class OuterA2>
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scoped_allocator_adaptor(OuterA2&& outerAlloc,
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const InnerAllocs&... innerAllocs) noexcept;
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scoped_allocator_adaptor(const scoped_allocator_adaptor& other) noexcept;
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scoped_allocator_adaptor(scoped_allocator_adaptor&& other) noexcept;
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template <class OuterA2>
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scoped_allocator_adaptor(const scoped_allocator_adaptor<OuterA2, InnerAllocs...>& other) noexcept;
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template <class OuterA2>
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scoped_allocator_adaptor(const scoped_allocator_adaptor<OuterA2, InnerAllocs...>&& other) noexcept;
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~scoped_allocator_adaptor();
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inner_allocator_type& inner_allocator() noexcept;
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const inner_allocator_type& inner_allocator() const noexcept;
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outer_allocator_type& outer_allocator() noexcept;
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const outer_allocator_type& outer_allocator() const noexcept;
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pointer allocate(size_type n);
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pointer allocate(size_type n, const_void_pointer hint);
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void deallocate(pointer p, size_type n) noexcept;
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size_type max_size() const;
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template <class T, class... Args> void construct(T* p, Args&& args);
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template <class T1, class T2, class... Args1, class... Args2>
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void construct(pair<T1, T2>* p, piecewise_construct t, tuple<Args1...> x,
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tuple<Args2...> y);
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template <class T1, class T2>
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void construct(pair<T1, T2>* p);
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template <class T1, class T2, class U, class V>
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void construct(pair<T1, T2>* p, U&& x, V&& y);
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template <class T1, class T2, class U, class V>
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void construct(pair<T1, T2>* p, const pair<U, V>& x);
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template <class T1, class T2, class U, class V>
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void construct(pair<T1, T2>* p, pair<U, V>&& x);
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template <class T> void destroy(T* p);
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template <class T> void destroy(T* p) noexcept;
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scoped_allocator_adaptor select_on_container_copy_construction() const noexcept;
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};
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template <class OuterA1, class OuterA2, class... InnerAllocs>
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bool
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operator==(const scoped_allocator_adaptor<OuterA1, InnerAllocs...>& a,
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const scoped_allocator_adaptor<OuterA2, InnerAllocs...>& b) noexcept;
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template <class OuterA1, class OuterA2, class... InnerAllocs>
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bool
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operator!=(const scoped_allocator_adaptor<OuterA1, InnerAllocs...>& a,
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const scoped_allocator_adaptor<OuterA2, InnerAllocs...>& b) noexcept;
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} // std
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*/
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#include <__config>
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#include <memory>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_ADVANCED_SFINAE)
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// scoped_allocator_adaptor
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template <class ..._Allocs>
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class scoped_allocator_adaptor;
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template <class ..._Allocs> struct __get_poc_copy_assignment;
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template <class _A0>
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struct __get_poc_copy_assignment<_A0>
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{
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static const bool value = allocator_traits<_A0>::
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propagate_on_container_copy_assignment::value;
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};
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template <class _A0, class ..._Allocs>
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struct __get_poc_copy_assignment<_A0, _Allocs...>
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{
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static const bool value =
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allocator_traits<_A0>::propagate_on_container_copy_assignment::value ||
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__get_poc_copy_assignment<_Allocs...>::value;
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};
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template <class ..._Allocs> struct __get_poc_move_assignment;
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template <class _A0>
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struct __get_poc_move_assignment<_A0>
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{
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static const bool value = allocator_traits<_A0>::
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propagate_on_container_move_assignment::value;
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};
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template <class _A0, class ..._Allocs>
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struct __get_poc_move_assignment<_A0, _Allocs...>
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{
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static const bool value =
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allocator_traits<_A0>::propagate_on_container_move_assignment::value ||
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__get_poc_move_assignment<_Allocs...>::value;
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};
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template <class ..._Allocs> struct __get_poc_swap;
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template <class _A0>
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struct __get_poc_swap<_A0>
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{
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static const bool value = allocator_traits<_A0>::
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propagate_on_container_swap::value;
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};
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template <class _A0, class ..._Allocs>
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struct __get_poc_swap<_A0, _Allocs...>
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{
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static const bool value =
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allocator_traits<_A0>::propagate_on_container_swap::value ||
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__get_poc_swap<_Allocs...>::value;
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};
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template <class ..._Allocs>
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class __scoped_allocator_storage;
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template <class _OuterAlloc, class... _InnerAllocs>
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class __scoped_allocator_storage<_OuterAlloc, _InnerAllocs...>
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: public _OuterAlloc
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{
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typedef _OuterAlloc outer_allocator_type;
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protected:
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typedef scoped_allocator_adaptor<_InnerAllocs...> inner_allocator_type;
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private:
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inner_allocator_type __inner_;
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protected:
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_LIBCPP_INLINE_VISIBILITY
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__scoped_allocator_storage() _NOEXCEPT {}
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, _OuterA2>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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__scoped_allocator_storage(_OuterA2&& __outerAlloc,
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const _InnerAllocs& ...__innerAllocs) _NOEXCEPT
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: outer_allocator_type(_VSTD::forward<_OuterA2>(__outerAlloc)),
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__inner_(__innerAllocs...) {}
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, const _OuterA2&>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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__scoped_allocator_storage(
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const __scoped_allocator_storage<_OuterA2, _InnerAllocs...>& __other) _NOEXCEPT
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: outer_allocator_type(__other.outer_allocator()),
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__inner_(__other.inner_allocator()) {}
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, _OuterA2>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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__scoped_allocator_storage(
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__scoped_allocator_storage<_OuterA2, _InnerAllocs...>&& __other) _NOEXCEPT
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: outer_allocator_type(_VSTD::move(__other.outer_allocator())),
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__inner_(_VSTD::move(__other.inner_allocator())) {}
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, _OuterA2>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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__scoped_allocator_storage(_OuterA2&& __o,
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const inner_allocator_type& __i) _NOEXCEPT
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: outer_allocator_type(_VSTD::forward<_OuterA2>(__o)),
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__inner_(__i)
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{
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}
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_LIBCPP_INLINE_VISIBILITY
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inner_allocator_type& inner_allocator() _NOEXCEPT {return __inner_;}
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_LIBCPP_INLINE_VISIBILITY
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const inner_allocator_type& inner_allocator() const _NOEXCEPT {return __inner_;}
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_LIBCPP_INLINE_VISIBILITY
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outer_allocator_type& outer_allocator() _NOEXCEPT
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{return static_cast<outer_allocator_type&>(*this);}
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_LIBCPP_INLINE_VISIBILITY
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const outer_allocator_type& outer_allocator() const _NOEXCEPT
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{return static_cast<const outer_allocator_type&>(*this);}
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scoped_allocator_adaptor<outer_allocator_type, _InnerAllocs...>
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_LIBCPP_INLINE_VISIBILITY
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select_on_container_copy_construction() const _NOEXCEPT
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{
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return scoped_allocator_adaptor<outer_allocator_type, _InnerAllocs...>
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(
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allocator_traits<outer_allocator_type>::
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select_on_container_copy_construction(outer_allocator()),
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allocator_traits<inner_allocator_type>::
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select_on_container_copy_construction(inner_allocator())
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);
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}
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template <class...> friend class __scoped_allocator_storage;
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};
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template <class _OuterAlloc>
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class __scoped_allocator_storage<_OuterAlloc>
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: public _OuterAlloc
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{
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typedef _OuterAlloc outer_allocator_type;
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protected:
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typedef scoped_allocator_adaptor<_OuterAlloc> inner_allocator_type;
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_LIBCPP_INLINE_VISIBILITY
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__scoped_allocator_storage() _NOEXCEPT {}
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, _OuterA2>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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__scoped_allocator_storage(_OuterA2&& __outerAlloc) _NOEXCEPT
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: outer_allocator_type(_VSTD::forward<_OuterA2>(__outerAlloc)) {}
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, const _OuterA2&>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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__scoped_allocator_storage(
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const __scoped_allocator_storage<_OuterA2>& __other) _NOEXCEPT
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: outer_allocator_type(__other.outer_allocator()) {}
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, _OuterA2>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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__scoped_allocator_storage(
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__scoped_allocator_storage<_OuterA2>&& __other) _NOEXCEPT
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: outer_allocator_type(_VSTD::move(__other.outer_allocator())) {}
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_LIBCPP_INLINE_VISIBILITY
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inner_allocator_type& inner_allocator() _NOEXCEPT
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{return static_cast<inner_allocator_type&>(*this);}
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_LIBCPP_INLINE_VISIBILITY
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const inner_allocator_type& inner_allocator() const _NOEXCEPT
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{return static_cast<const inner_allocator_type&>(*this);}
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_LIBCPP_INLINE_VISIBILITY
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outer_allocator_type& outer_allocator() _NOEXCEPT
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{return static_cast<outer_allocator_type&>(*this);}
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_LIBCPP_INLINE_VISIBILITY
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const outer_allocator_type& outer_allocator() const _NOEXCEPT
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{return static_cast<const outer_allocator_type&>(*this);}
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_LIBCPP_INLINE_VISIBILITY
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scoped_allocator_adaptor<outer_allocator_type>
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select_on_container_copy_construction() const _NOEXCEPT
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{return scoped_allocator_adaptor<outer_allocator_type>(
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allocator_traits<outer_allocator_type>::
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select_on_container_copy_construction(outer_allocator())
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);}
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__scoped_allocator_storage(const outer_allocator_type& __o,
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const inner_allocator_type& __i) _NOEXCEPT;
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template <class...> friend class __scoped_allocator_storage;
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};
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// __outermost
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template <class _Alloc>
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decltype(declval<_Alloc>().outer_allocator(), true_type())
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__has_outer_allocator_test(_Alloc&& __a);
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template <class _Alloc>
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false_type
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__has_outer_allocator_test(const volatile _Alloc& __a);
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template <class _Alloc>
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struct __has_outer_allocator
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: public common_type
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<
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decltype(__has_outer_allocator_test(declval<_Alloc&>()))
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>::type
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{
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};
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template <class _Alloc, bool = __has_outer_allocator<_Alloc>::value>
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struct __outermost
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{
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typedef _Alloc type;
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_LIBCPP_INLINE_VISIBILITY
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type& operator()(type& __a) const _NOEXCEPT {return __a;}
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};
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template <class _Alloc>
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struct __outermost<_Alloc, true>
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{
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typedef typename remove_reference
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<
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decltype(_VSTD::declval<_Alloc>().outer_allocator())
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>::type _OuterAlloc;
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typedef typename __outermost<_OuterAlloc>::type type;
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_LIBCPP_INLINE_VISIBILITY
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type& operator()(_Alloc& __a) const _NOEXCEPT
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{return __outermost<_OuterAlloc>()(__a.outer_allocator());}
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};
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template <class _OuterAlloc, class... _InnerAllocs>
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class _LIBCPP_VISIBLE scoped_allocator_adaptor<_OuterAlloc, _InnerAllocs...>
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: public __scoped_allocator_storage<_OuterAlloc, _InnerAllocs...>
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{
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typedef __scoped_allocator_storage<_OuterAlloc, _InnerAllocs...> base;
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typedef allocator_traits<_OuterAlloc> _OuterTraits;
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public:
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typedef _OuterAlloc outer_allocator_type;
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typedef typename base::inner_allocator_type inner_allocator_type;
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typedef typename _OuterTraits::size_type size_type;
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typedef typename _OuterTraits::difference_type difference_type;
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typedef typename _OuterTraits::pointer pointer;
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typedef typename _OuterTraits::const_pointer const_pointer;
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typedef typename _OuterTraits::void_pointer void_pointer;
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typedef typename _OuterTraits::const_void_pointer const_void_pointer;
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typedef integral_constant
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<
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bool,
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__get_poc_copy_assignment<outer_allocator_type,
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_InnerAllocs...>::value
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> propagate_on_container_copy_assignment;
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typedef integral_constant
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<
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bool,
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__get_poc_move_assignment<outer_allocator_type,
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_InnerAllocs...>::value
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> propagate_on_container_move_assignment;
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typedef integral_constant
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<
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bool,
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__get_poc_swap<outer_allocator_type, _InnerAllocs...>::value
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> propagate_on_container_swap;
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template <class _Tp>
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struct rebind
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{
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typedef scoped_allocator_adaptor
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<
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typename _OuterTraits::template rebind_alloc<_Tp>, _InnerAllocs...
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> other;
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};
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_LIBCPP_INLINE_VISIBILITY
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scoped_allocator_adaptor() _NOEXCEPT {}
|
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, _OuterA2>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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scoped_allocator_adaptor(_OuterA2&& __outerAlloc,
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const _InnerAllocs& ...__innerAllocs) _NOEXCEPT
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: base(_VSTD::forward<_OuterA2>(__outerAlloc), __innerAllocs...) {}
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// scoped_allocator_adaptor(const scoped_allocator_adaptor& __other) = default;
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, const _OuterA2&>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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scoped_allocator_adaptor(
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const scoped_allocator_adaptor<_OuterA2, _InnerAllocs...>& __other) _NOEXCEPT
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: base(__other) {}
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template <class _OuterA2,
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class = typename enable_if<
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is_constructible<outer_allocator_type, _OuterA2>::value
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>::type>
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_LIBCPP_INLINE_VISIBILITY
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|
scoped_allocator_adaptor(
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scoped_allocator_adaptor<_OuterA2, _InnerAllocs...>&& __other) _NOEXCEPT
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: base(_VSTD::move(__other)) {}
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// ~scoped_allocator_adaptor() = default;
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_LIBCPP_INLINE_VISIBILITY
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inner_allocator_type& inner_allocator() _NOEXCEPT
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{return base::inner_allocator();}
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_LIBCPP_INLINE_VISIBILITY
|
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const inner_allocator_type& inner_allocator() const _NOEXCEPT
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{return base::inner_allocator();}
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_LIBCPP_INLINE_VISIBILITY
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outer_allocator_type& outer_allocator() _NOEXCEPT
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{return base::outer_allocator();}
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_LIBCPP_INLINE_VISIBILITY
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const outer_allocator_type& outer_allocator() const _NOEXCEPT
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{return base::outer_allocator();}
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_LIBCPP_INLINE_VISIBILITY
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pointer allocate(size_type __n)
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{return allocator_traits<outer_allocator_type>::
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allocate(outer_allocator(), __n);}
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_LIBCPP_INLINE_VISIBILITY
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pointer allocate(size_type __n, const_void_pointer __hint)
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{return allocator_traits<outer_allocator_type>::
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allocate(outer_allocator(), __n, __hint);}
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_LIBCPP_INLINE_VISIBILITY
|
|
void deallocate(pointer __p, size_type __n) _NOEXCEPT
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{allocator_traits<outer_allocator_type>::
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deallocate(outer_allocator(), __p, __n);}
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_LIBCPP_INLINE_VISIBILITY
|
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size_type max_size() const
|
|
{return allocator_traits<outer_allocator_type>::max_size(outer_allocator());}
|
|
|
|
template <class _Tp, class... _Args>
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|
_LIBCPP_INLINE_VISIBILITY
|
|
void construct(_Tp* __p, _Args&& ...__args)
|
|
{__construct(__uses_alloc_ctor<_Tp, inner_allocator_type, _Args...>(),
|
|
__p, _VSTD::forward<_Args>(__args)...);}
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void destroy(_Tp* __p)
|
|
{
|
|
typedef __outermost<outer_allocator_type> _OM;
|
|
allocator_traits<typename _OM::type>::
|
|
destroy(_OM()(outer_allocator()), __p);
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
scoped_allocator_adaptor select_on_container_copy_construction() const _NOEXCEPT
|
|
{return base::select_on_container_copy_construction();}
|
|
|
|
private:
|
|
|
|
template <class _OuterA2,
|
|
class = typename enable_if<
|
|
is_constructible<outer_allocator_type, _OuterA2>::value
|
|
>::type>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
scoped_allocator_adaptor(_OuterA2&& __o,
|
|
const inner_allocator_type& __i) _NOEXCEPT
|
|
: base(_VSTD::forward<_OuterA2>(__o), __i) {}
|
|
|
|
template <class _Tp, class... _Args>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __construct(integral_constant<int, 0>, _Tp* __p, _Args&& ...__args)
|
|
{
|
|
typedef __outermost<outer_allocator_type> _OM;
|
|
allocator_traits<typename _OM::type>::construct
|
|
(
|
|
_OM()(outer_allocator()),
|
|
__p,
|
|
_VSTD::forward<_Args>(__args)...
|
|
);
|
|
}
|
|
|
|
template <class _Tp, class... _Args>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __construct(integral_constant<int, 1>, _Tp* __p, _Args&& ...__args)
|
|
{
|
|
typedef __outermost<outer_allocator_type> _OM;
|
|
allocator_traits<typename _OM::type>::construct
|
|
(
|
|
_OM()(outer_allocator()),
|
|
__p,
|
|
allocator_arg,
|
|
inner_allocator(),
|
|
_VSTD::forward<_Args>(__args)...
|
|
);
|
|
}
|
|
|
|
template <class _Tp, class... _Args>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __construct(integral_constant<int, 2>, _Tp* __p, _Args&& ...__args)
|
|
{
|
|
typedef __outermost<outer_allocator_type> _OM;
|
|
allocator_traits<typename _OM::type>::construct
|
|
(
|
|
_OM()(outer_allocator()),
|
|
__p,
|
|
_VSTD::forward<_Args>(__args)...,
|
|
inner_allocator()
|
|
);
|
|
}
|
|
|
|
template <class...> friend class __scoped_allocator_storage;
|
|
};
|
|
|
|
template <class _OuterA1, class _OuterA2>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator==(const scoped_allocator_adaptor<_OuterA1>& __a,
|
|
const scoped_allocator_adaptor<_OuterA2>& __b) _NOEXCEPT
|
|
{
|
|
return __a.outer_allocator() == __b.outer_allocator();
|
|
}
|
|
|
|
template <class _OuterA1, class _OuterA2, class _InnerA0, class... _InnerAllocs>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator==(const scoped_allocator_adaptor<_OuterA1, _InnerA0, _InnerAllocs...>& __a,
|
|
const scoped_allocator_adaptor<_OuterA2, _InnerA0, _InnerAllocs...>& __b) _NOEXCEPT
|
|
{
|
|
return __a.outer_allocator() == __b.outer_allocator() &&
|
|
__a.inner_allocator() == __b.inner_allocator();
|
|
}
|
|
|
|
template <class _OuterA1, class _OuterA2, class... _InnerAllocs>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator!=(const scoped_allocator_adaptor<_OuterA1, _InnerAllocs...>& __a,
|
|
const scoped_allocator_adaptor<_OuterA2, _InnerAllocs...>& __b) _NOEXCEPT
|
|
{
|
|
return !(__a == __b);
|
|
}
|
|
|
|
#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_ADVANCED_SFINAE)
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_SCOPED_ALLOCATOR
|