1 /* PowerPC 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 #if __WORDSIZE == 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 #if __WORDSIZE == 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 __elision; 46 # define __spins __elision_data.__espins 47 # define __elision __elision_data.__elision 48 } __elision_data; 49 __pthread_slist_t __list; 50 }; 51 # define __PTHREAD_MUTEX_HAVE_PREV 0 52 #endif 53 }; 54 55 #if __WORDSIZE == 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