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/* x86 internal rwlock struct definitions.
Copyright (C) 2019-2020 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
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