6dc958e5dd
* sysdeps/hppa/nptl/pthread_spin_lock.c (pthread_spin_lock): Swap newval and oldval. * sysdeps/hppa/nptl/pthread_spin_trylock.c (pthread_spin_trylock): Likewise.
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/* 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;
|
|
}
|