1 | /* x86 internal mutex struct definitions. |
2 | Copyright (C) 2019-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _THREAD_MUTEX_INTERNAL_H |
20 | #define _THREAD_MUTEX_INTERNAL_H 1 |
21 | |
22 | struct __pthread_mutex_s |
23 | { |
24 | int __lock; |
25 | unsigned int __count; |
26 | int __owner; |
27 | #ifdef __x86_64__ |
28 | unsigned int __nusers; |
29 | #endif |
30 | /* KIND must stay at this position in the structure to maintain |
31 | binary compatibility with static initializers. */ |
32 | int __kind; |
33 | #ifdef __x86_64__ |
34 | short __spins; |
35 | short __elision; |
36 | __pthread_list_t __list; |
37 | # define __PTHREAD_MUTEX_HAVE_PREV 1 |
38 | #else |
39 | unsigned int __nusers; |
40 | __extension__ union |
41 | { |
42 | struct |
43 | { |
44 | short __espins; |
45 | short __eelision; |
46 | # define __spins __elision_data.__espins |
47 | # define __elision __elision_data.__eelision |
48 | } __elision_data; |
49 | __pthread_slist_t __list; |
50 | }; |
51 | # define __PTHREAD_MUTEX_HAVE_PREV 0 |
52 | #endif |
53 | }; |
54 | |
55 | #ifdef __x86_64__ |
56 | # define __PTHREAD_MUTEX_INITIALIZER(__kind) \ |
57 | 0, 0, 0, 0, __kind, 0, 0, { 0, 0 } |
58 | #else |
59 | # define __PTHREAD_MUTEX_INITIALIZER(__kind) \ |
60 | 0, 0, 0, __kind, 0, { { 0, 0 } } |
61 | #endif |
62 | |
63 | #endif |
64 | |