| 0,0 → 1,150 |
|---|
| // Allocator that wraps operator new -*- C++ -*- |
| |
| // Copyright (C) 2001-2015 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| /** @file ext/new_allocator.h |
| * This file is a GNU extension to the Standard C++ Library. |
| */ |
| |
| #ifndef _NEW_ALLOCATOR_H |
| #define _NEW_ALLOCATOR_H 1 |
| |
| #include <bits/c++config.h> |
| #include <new> |
| #include <bits/functexcept.h> |
| #include <bits/move.h> |
| #if __cplusplus >= 201103L |
| #include <type_traits> |
| #endif |
| |
| namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| using std::size_t; |
| using std::ptrdiff_t; |
| |
| /** |
| * @brief An allocator that uses global new, as per [20.4]. |
| * @ingroup allocators |
| * |
| * This is precisely the allocator defined in the C++ Standard. |
| * - all allocation calls operator new |
| * - all deallocation calls operator delete |
| * |
| * @tparam _Tp Type of allocated object. |
| */ |
| template<typename _Tp> |
| class new_allocator |
| { |
| public: |
| typedef size_t size_type; |
| typedef ptrdiff_t difference_type; |
| typedef _Tp* pointer; |
| typedef const _Tp* const_pointer; |
| typedef _Tp& reference; |
| typedef const _Tp& const_reference; |
| typedef _Tp value_type; |
| |
| template<typename _Tp1> |
| struct rebind |
| { typedef new_allocator<_Tp1> other; }; |
| |
| #if __cplusplus >= 201103L |
| // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| // 2103. propagate_on_container_move_assignment |
| typedef std::true_type propagate_on_container_move_assignment; |
| #endif |
| |
| new_allocator() _GLIBCXX_USE_NOEXCEPT { } |
| |
| new_allocator(const new_allocator&) _GLIBCXX_USE_NOEXCEPT { } |
| |
| template<typename _Tp1> |
| new_allocator(const new_allocator<_Tp1>&) _GLIBCXX_USE_NOEXCEPT { } |
| |
| ~new_allocator() _GLIBCXX_USE_NOEXCEPT { } |
| |
| pointer |
| address(reference __x) const _GLIBCXX_NOEXCEPT |
| { return std::__addressof(__x); } |
| |
| const_pointer |
| address(const_reference __x) const _GLIBCXX_NOEXCEPT |
| { return std::__addressof(__x); } |
| |
| // NB: __n is permitted to be 0. The C++ standard says nothing |
| // about what the return value is when __n == 0. |
| pointer |
| allocate(size_type __n, const void* = 0) |
| { |
| if (__n > this->max_size()) |
| std::__throw_bad_alloc(); |
| |
| return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp))); |
| } |
| |
| // __p is not permitted to be a null pointer. |
| void |
| deallocate(pointer __p, size_type) |
| { ::operator delete(__p); } |
| |
| size_type |
| max_size() const _GLIBCXX_USE_NOEXCEPT |
| { return size_t(-1) / sizeof(_Tp); } |
| |
| #if __cplusplus >= 201103L |
| template<typename _Up, typename... _Args> |
| void |
| construct(_Up* __p, _Args&&... __args) |
| { ::new((void *)__p) _Up(std::forward<_Args>(__args)...); } |
| |
| template<typename _Up> |
| void |
| destroy(_Up* __p) { __p->~_Up(); } |
| #else |
| // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| // 402. wrong new expression in [some_] allocator::construct |
| void |
| construct(pointer __p, const _Tp& __val) |
| { ::new((void *)__p) _Tp(__val); } |
| |
| void |
| destroy(pointer __p) { __p->~_Tp(); } |
| #endif |
| }; |
| |
| template<typename _Tp> |
| inline bool |
| operator==(const new_allocator<_Tp>&, const new_allocator<_Tp>&) |
| { return true; } |
| |
| template<typename _Tp> |
| inline bool |
| operator!=(const new_allocator<_Tp>&, const new_allocator<_Tp>&) |
| { return false; } |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace |
| |
| #endif |