mirror of git://gcc.gnu.org/git/gcc.git
74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
// Aligned memory buffer -*- C++ -*-
|
|
|
|
// Copyright (C) 2013 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/aligned_buffer.h
|
|
* This file is a GNU extension to the Standard C++ Library.
|
|
*/
|
|
|
|
#ifndef _ALIGNED_BUFFER_H
|
|
#define _ALIGNED_BUFFER_H 1
|
|
|
|
#pragma GCC system_header
|
|
|
|
#if __cplusplus >= 201103L
|
|
# include <type_traits>
|
|
#else
|
|
# include <bits/c++0x_warning.h>
|
|
#endif
|
|
|
|
namespace __gnu_cxx
|
|
{
|
|
template<typename _Tp>
|
|
struct __aligned_buffer
|
|
: std::aligned_storage<sizeof(_Tp), std::alignment_of<_Tp>::value>
|
|
{
|
|
typename
|
|
std::aligned_storage<sizeof(_Tp), std::alignment_of<_Tp>::value>::type
|
|
_M_storage;
|
|
|
|
void*
|
|
_M_addr() noexcept
|
|
{
|
|
return static_cast<void*>(&_M_storage);
|
|
}
|
|
|
|
const void*
|
|
_M_addr() const noexcept
|
|
{
|
|
return static_cast<const void*>(&_M_storage);
|
|
}
|
|
|
|
_Tp*
|
|
_M_ptr() noexcept
|
|
{ return static_cast<_Tp*>(_M_addr()); }
|
|
|
|
const _Tp*
|
|
_M_ptr() const noexcept
|
|
{ return static_cast<const _Tp*>(_M_addr()); }
|
|
};
|
|
|
|
} // namespace
|
|
|
|
#endif /* _ALIGNED_BUFFER_H */
|