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1/* pthread_spin_unlock -- unlock a spin lock. Generic version.
2 Copyright (C) 2003-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
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#include "pthreadP.h"
21#include <atomic.h>
22
23int
24pthread_spin_unlock (pthread_spinlock_t *lock)
25{
26 /* The atomic_store_release synchronizes-with the atomic_exchange_acquire
27 or atomic_compare_exchange_weak_acquire in pthread_spin_lock /
28 pthread_spin_trylock. */
29 atomic_store_release (lock, 0);
30 return 0;
31}
32

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