| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_STDDEF_H |
| 2 | #define _LINUX_STDDEF_H |
| 3 | |
| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 4 | #include <uapi/linux/stddef.h> |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | |
| Lubos Lunak | 2084c24 | 2012-03-21 14:08:24 +0100 | [diff] [blame] | 6 | #undef NULL |
| 7 | #define NULL ((void *)0) |
| 8 | |
| Richard Knutsson | 6e21828 | 2006-09-30 23:27:11 -0700 | [diff] [blame] | 9 | enum { |
| 10 | false = 0, |
| 11 | true = 1 |
| 12 | }; |
| 13 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #undef offsetof |
| 15 | #ifdef __compiler_offsetof |
| Joe Perches | 8c7fbe5 | 2015-06-25 15:01:16 -0700 | [diff] [blame] | 16 | #define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER) |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #else |
| Joe Perches | 8c7fbe5 | 2015-06-25 15:01:16 -0700 | [diff] [blame] | 18 | #define offsetof(TYPE, MEMBER) ((size_t)&((TYPE *)0)->MEMBER) |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #endif |
| Denys Vlasenko | 3876488 | 2015-03-09 15:52:17 +0100 | [diff] [blame] | 20 | |
| 21 | /** |
| 22 | * offsetofend(TYPE, MEMBER) |
| 23 | * |
| 24 | * @TYPE: The type of the structure |
| 25 | * @MEMBER: The member within the structure to get the end offset of |
| 26 | */ |
| 27 | #define offsetofend(TYPE, MEMBER) \ |
| 28 | (offsetof(TYPE, MEMBER) + sizeof(((TYPE *)0)->MEMBER)) |
| Joe Perches | 8c7fbe5 | 2015-06-25 15:01:16 -0700 | [diff] [blame] | 29 | |
| 30 | #endif |