2 Copyright (C) 2000-2018 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
22 /* The default for single processor machines; don't spin, it's
24 #ifndef __PTHREAD_SPIN_COUNT
25 # define __PTHREAD_SPIN_COUNT 1
28 /* The number of times to spin while trying to lock a spin lock object
29 before yielding the processor. */
30 int __pthread_spin_count
= __PTHREAD_SPIN_COUNT
;
33 /* Lock the spin lock object LOCK. If the lock is held by another
34 thread spin until it becomes available. */
36 _pthread_spin_lock (__pthread_spinlock_t
*lock
)
42 for (i
= 0; i
< __pthread_spin_count
; i
++)
44 if (__pthread_spin_trylock (lock
) == 0)