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