glibc/nptl/sysdeps/ia64/pthread_spin_trylock.c
Roland McGrath b33e61633a * sysdeps/generic/dl-sysdep.c (_dl_important_hwcaps): If CNT == 1,
allocate space even for the trailing '/'.
	Reported by John Reiser <jreiser@BitWagon.com>.

	* sysdeps/unix/sysv/linux/ia64/sysdep.h (LOAD_ARGS_6, ASM_ARGS_6,
	ASM_CLOBBERS_6): Define.
	(ASM_CLOBBERS_5): Use ASM_CLOBBERS_6.
	* sysdeps/unix/sysv/linux/ia64/clone2.S (__clone2): Reorder arguments
	to match IA-32 order.
	* sysdeps/unix/sysv/linux/i386/clone.S: Fix comment.
2003-03-11 09:30:37 +00:00

29 lines
1.1 KiB
C

/* Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include "pthreadP.h"
int
pthread_spin_trylock (lock)
pthread_spinlock_t *lock;
{
return __sync_val_compare_and_swap_si ((int *) lock, 0, 1) == 0 ? 0 : EBUSY;
}