1 /* pthread_spin_trylock -- trylock a spin lock. Generic version.
2 Copyright (C) 2012-2016 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19 #include <errno.h>
20 #include <atomic.h>
21 #include "pthreadP.h"
22
23 int
pthread_spin_trylock(pthread_spinlock_t * lock)24 pthread_spin_trylock (pthread_spinlock_t *lock)
25 {
26 return atomic_exchange_acq (lock, 1) ? EBUSY : 0;
27 }
28