1 // Aligned memory buffer -*- C++ -*-
3 // Copyright (C) 2013 Free Software Foundation, Inc.
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)
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.
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.
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/>.
25 /** @file ext/aligned_buffer.h
26 * This file is a GNU extension to the Standard C++ Library.
29 #ifndef _ALIGNED_BUFFER_H
30 #define _ALIGNED_BUFFER_H 1
32 #pragma GCC system_header
34 #if __cplusplus >= 201103L
35 # include <type_traits>
37 # include <bits/c++0x_warning.h>
42 template<typename _Tp
>
43 struct __aligned_buffer
44 : std::aligned_storage
<sizeof(_Tp
), std::alignment_of
<_Tp
>::value
>
47 std::aligned_storage
<sizeof(_Tp
), std::alignment_of
<_Tp
>::value
>::type
53 return static_cast<void*>(&_M_storage
);
57 _M_addr() const noexcept
59 return static_cast<const void*>(&_M_storage
);
64 { return static_cast<_Tp
*>(_M_addr()); }
67 _M_ptr() const noexcept
68 { return static_cast<const _Tp
*>(_M_addr()); }
73 #endif /* _ALIGNED_BUFFER_H */