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The C and C++ Include Header Files
cat -n /usr/include/x86_64-linux-gnu/bits/struct_rwlock.h
1 /* x86 internal rwlock struct definitions. 2 Copyright (C) 2019-2026 Free Software Foundation, Inc. 3 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef _RWLOCK_INTERNAL_H 21 #define _RWLOCK_INTERNAL_H 22 23 struct __pthread_rwlock_arch_t 24 { 25 unsigned int __readers; 26 unsigned int __writers; 27 unsigned int __wrphase_futex; 28 unsigned int __writers_futex; 29 unsigned int __pad3; 30 unsigned int __pad4; 31 #ifdef __x86_64__ 32 int __cur_writer; 33 int __shared; 34 unsigned long int __pad1; 35 unsigned long int __pad2; 36 /* FLAGS must stay at this position in the structure to maintain 37 binary compatibility. */ 38 unsigned int __flags; 39 #else /* __x86_64__ */ 40 /* FLAGS must stay at this position in the structure to maintain 41 binary compatibility. */ 42 unsigned char __flags; 43 unsigned char __shared; 44 unsigned char __pad1; 45 unsigned char __pad2; 46 int __cur_writer; 47 #endif 48 }; 49 50 #ifdef __x86_64__ 51 # define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ 52 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, __flags 53 #else 54 # define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ 55 0, 0, 0, 0, 0, 0, __flags, 0, 0, 0, 0 56 #endif 57 58 #endif
