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/* x86 internal rwlock struct definitions. Copyright (C) 2019-2021 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _RWLOCK_INTERNAL_H #define _RWLOCK_INTERNAL_H struct __pthread_rwlock_arch_t { unsigned int __readers; unsigned int __writers; unsigned int __wrphase_futex; unsigned int __writers_futex; unsigned int __pad3; unsigned int __pad4; #ifdef __x86_64__ int __cur_writer; int __shared; signed char __rwelision; # ifdef __ILP32__ unsigned char __pad1[3]; # define __PTHREAD_RWLOCK_ELISION_EXTRA 0, { 0, 0, 0 } # else unsigned char __pad1[7]; # define __PTHREAD_RWLOCK_ELISION_EXTRA 0, { 0, 0, 0, 0, 0, 0, 0 } # endif unsigned long int __pad2; /* FLAGS must stay at this position in the structure to maintain binary compatibility. */ unsigned int __flags; #else /* __x86_64__ */ /* FLAGS must stay at this position in the structure to maintain binary compatibility. */ unsigned char __flags; unsigned char __shared; signed char __rwelision; unsigned char __pad2; int __cur_writer; #endif }; #ifdef __x86_64__ # define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ 0, 0, 0, 0, 0, 0, 0, 0, __PTHREAD_RWLOCK_ELISION_EXTRA, 0, __flags #else # define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ 0, 0, 0, 0, 0, 0, __flags, 0, 0, 0, 0 #endif #endif