libstdc++
ext/new_allocator.h
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1// Allocator that wraps operator new -*- C++ -*-
2
3// Copyright (C) 2001-2022 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/** @file ext/new_allocator.h
26 * This file is a GNU extension to the Standard C++ Library.
27 */
28
29#ifndef _NEW_ALLOCATOR_H
30#define _NEW_ALLOCATOR_H 1
31
32#include <bits/new_allocator.h>
33
34namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
35{
36_GLIBCXX_BEGIN_NAMESPACE_VERSION
37
38 /**
39 * @brief An allocator that uses global `new`, as per C++03 [20.4.1].
40 * @ingroup allocators
41 *
42 * This is precisely the allocator defined in the C++ Standard.
43 * - all allocation calls `operator new`
44 * - all deallocation calls `operator delete`
45 *
46 * This is a non-standard extension that can be used to guarantee
47 * allocation from `new` even if the library has been configured to
48 * use a different implementation for `std::allocator`.
49 *
50 * @tparam _Tp Type of allocated object.
51 *
52 * @headerfile ext/new_allocator.h
53 */
54 template<typename _Tp>
56 {
57 public:
58#if __cplusplus <= 201703L
59 template<typename _Tp1>
60 struct rebind
61 { typedef new_allocator<_Tp1> other; };
62#endif
63
64 new_allocator() _GLIBCXX_USE_NOEXCEPT { }
65
66 new_allocator(const new_allocator&) _GLIBCXX_USE_NOEXCEPT { }
67
68 template<typename _Tp1>
69 new_allocator(const new_allocator<_Tp1>&) _GLIBCXX_USE_NOEXCEPT { }
70 };
71
72_GLIBCXX_END_NAMESPACE_VERSION
73} // namespace
74
75#endif
GNU extensions for public use.
An allocator that uses global new, as per C++03 [20.4.1].
An allocator that uses global new, as per C++03 [20.4.1].