1 /* HPPA 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 __LOCK_ALIGNMENT; 25 unsigned int __count; 26 int __owner; 27 /* KIND must stay at this position in the structure to maintain 28 binary compatibility with static initializers. */ 29 int __kind; 30 /* The old 4-word 16-byte aligned lock. This is initalized 31 to all ones by the Linuxthreads PTHREAD_MUTEX_INITIALIZER. 32 Unused in NPTL. */ 33 int __glibc_compat_padding[4]; 34 /* In the old structure there are 4 words left due to alignment. 35 In NPTL two words are used. */ 36 unsigned int __nusers; 37 __extension__ union 38 { 39 int __spins; 40 __pthread_slist_t __list; 41 }; 42 /* Two more words are left before the NPTL 43 pthread_mutex_t is larger than Linuxthreads. */ 44 int __glibc_reserved1; 45 int __glibc_reserved2; 46 }; 47 48 #define __PTHREAD_MUTEX_HAVE_PREV 0 49 50 #define __PTHREAD_MUTEX_INITIALIZER(__kind) \ 51 0, 0, 0, __kind, { 0, 0, 0, 0 }, 0, { 0 }, 0, 0 52 53 #endif 54