1/* x86 internal mutex struct definitions. 
2 Copyright (C) 2019-2020 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 
22struct __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