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/* Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <atomic.h>
#include "pthreadP.h"
int
pthread_spin_lock (pthread_spinlock_t *lock)
{
#if 0
volatile unsigned int *addr = __ldcw_align (lock);
while (__ldcw (addr) == 0)
while (*addr == 0) ;
return 0;
#endif
while (atomic_compare_and_exchange_val_acq(lock, 1, 0) == 1)
while (*lock == 1);
return 0;
}
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