| /** |
| * @file contain.h |
| * @brief Implements pseudo object oriented features. |
| * @note Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com> |
| * |
| * This program 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 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| #ifndef HAVE_CONTAIN_H |
| #define HAVE_CONTAIN_H |
| |
| #include <stddef.h> |
| |
| /* |
| * This macro borrowed from the Linux kernel. |
| */ |
| #define container_of(ptr, type, member) ({ \ |
| const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
| (type *)( (char *)__mptr - offsetof(type, member) ); \ |
| }) |
| |
| #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
| |
| #endif |
