glibc/nptl/sysdeps/sh/pthread_spin_trylock.S

/* Copyright (C) 2003 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 <pthread-errnos.h>

	.globl	pthread_spin_trylock
	.type	pthread_spin_trylock,@function
	.align	5
pthread_spin_trylock:
	tas.b	@r4
	bf/s	1f
	mov	#EBUSY, r0
	mov	#0, r0
1:
	rts
	 nop
	.size	pthread_spin_trylock,.-pthread_spin_trylock