summaryrefslogtreecommitdiff
path: root/sysdeps/m68k/nptl/pthread_spin_lock.c
blob: 90a8262b240b858524920de18bf722dee84378f1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
/* Copyright (C) 2010 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.

   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/>.  */

#include <atomic.h>
#include "pthreadP.h"

int
pthread_spin_lock (pthread_spinlock_t *lock)
{
  while (atomic_compare_and_exchange_val_acq(lock, 1, 0) != 0)
   while (*lock != 0)
    ;

  return 0;
}