| /* Copyright (C) 2003-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003. |
| |
| 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 <errno.h> |
| #include "pthreadP.h" |
| |
| int |
| pthread_spin_trylock (lock) |
| pthread_spinlock_t *lock; |
| { |
| int old; |
| |
| __asm __volatile ("cs %0,%3,%1" |
| : "=d" (old), "=Q" (*lock) |
| : "0" (0), "d" (1), "m" (*lock) : "cc" ); |
| |
| return old != 0 ? EBUSY : 0; |
| } |
