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64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* x86 internal mutex struct definitions.
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Copyright (C) 2019-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _THREAD_MUTEX_INTERNAL_H
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#define _THREAD_MUTEX_INTERNAL_H 1
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struct __pthread_mutex_s
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{
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int __lock;
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unsigned int __count;
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int __owner;
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#ifdef __x86_64__
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unsigned int __nusers;
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#endif
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/* KIND must stay at this position in the structure to maintain
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binary compatibility with static initializers. */
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int __kind;
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#ifdef __x86_64__
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short __spins;
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short __elision;
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__pthread_list_t __list;
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# define __PTHREAD_MUTEX_HAVE_PREV 1
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#else
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unsigned int __nusers;
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__extension__ union
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{
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struct
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{
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short __espins;
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short __eelision;
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# define __spins __elision_data.__espins
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# define __elision __elision_data.__eelision
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} __elision_data;
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__pthread_slist_t __list;
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};
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# define __PTHREAD_MUTEX_HAVE_PREV 0
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#endif
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};
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#ifdef __x86_64__
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# define __PTHREAD_MUTEX_INITIALIZER(__kind) \
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0, 0, 0, 0, __kind, 0, 0, { 0, 0 }
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#else
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# define __PTHREAD_MUTEX_INITIALIZER(__kind) \
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0, 0, 0, __kind, 0, { { 0, 0 } }
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#endif
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#endif
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