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/* x86 internal mutex 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 _THREAD_MUTEX_INTERNAL_H
#define _THREAD_MUTEX_INTERNAL_H 1
struct __pthread_mutex_s
{
int __lock;
unsigned int __count;
int __owner;
#ifdef __x86_64__
unsigned int __nusers;
#endif
/* KIND must stay at this position in the structure to maintain
binary compatibility with static initializers. */
int __kind;
#ifdef __x86_64__
short __spins;
short __elision;
__pthread_list_t __list;
# define __PTHREAD_MUTEX_HAVE_PREV 1
#else
unsigned int __nusers;
__extension__ union
{
struct
{
short __espins;
short __eelision;
# define __spins __elision_data.__espins
# define __elision __elision_data.__eelision
} __elision_data;
__pthread_slist_t __list;
};
# define __PTHREAD_MUTEX_HAVE_PREV 0
#endif
};
#ifdef __x86_64__
# define __PTHREAD_MUTEX_INITIALIZER(__kind) \
0, 0, 0, 0, __kind, 0, 0, { 0, 0 }
#else
# define __PTHREAD_MUTEX_INITIALIZER(__kind) \
0, 0, 0, __kind, 0, { { 0, 0 } }
#endif
#endif