1 | /* x86 internal rwlock struct definitions. |
2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
3 | |
4 | This file is part of the GNU C Library. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
11 | The GNU C 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 GNU |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ |
19 | |
20 | #ifndef _RWLOCK_INTERNAL_H |
21 | #define _RWLOCK_INTERNAL_H |
22 | |
23 | struct __pthread_rwlock_arch_t |
24 | { |
25 | unsigned int __readers; |
26 | unsigned int __writers; |
27 | unsigned int __wrphase_futex; |
28 | unsigned int __writers_futex; |
29 | unsigned int __pad3; |
30 | unsigned int __pad4; |
31 | #ifdef __x86_64__ |
32 | int __cur_writer; |
33 | int __shared; |
34 | signed char __rwelision; |
35 | # ifdef __ILP32__ |
36 | unsigned char __pad1[3]; |
37 | # define __PTHREAD_RWLOCK_ELISION_EXTRA 0, { 0, 0, 0 } |
38 | # else |
39 | unsigned char __pad1[7]; |
40 | # define 0, { 0, 0, 0, 0, 0, 0, 0 } |
41 | # endif |
42 | unsigned long int __pad2; |
43 | /* FLAGS must stay at this position in the structure to maintain |
44 | binary compatibility. */ |
45 | unsigned int __flags; |
46 | #else /* __x86_64__ */ |
47 | /* FLAGS must stay at this position in the structure to maintain |
48 | binary compatibility. */ |
49 | unsigned char __flags; |
50 | unsigned char __shared; |
51 | signed char __rwelision; |
52 | unsigned char __pad2; |
53 | int __cur_writer; |
54 | #endif |
55 | }; |
56 | |
57 | #ifdef __x86_64__ |
58 | # define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ |
59 | 0, 0, 0, 0, 0, 0, 0, 0, __PTHREAD_RWLOCK_ELISION_EXTRA, 0, __flags |
60 | #else |
61 | # define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ |
62 | 0, 0, 0, 0, 0, 0, __flags, 0, 0, 0, 0 |
63 | #endif |
64 | |
65 | #endif |
66 | |