1/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library; if not, see
16   <https://www.gnu.org/licenses/>.  */
17
18#include <sysdep.h>
19#include <errno.h>
20#include <shlib-compat.h>
21
22ENTRY(__pthread_spin_trylock)
23	movl	$1, %eax
24	xorl	%ecx, %ecx
25	lock
26	cmpxchgl %ecx, (%rdi)
27	movl	$EBUSY, %eax
28	cmovel	%ecx, %eax
29	retq
30END(__pthread_spin_trylock)
31versioned_symbol (libc, __pthread_spin_trylock, pthread_spin_trylock,
32		  GLIBC_2_34)
33
34#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
35compat_symbol (libpthread, __pthread_spin_trylock, pthread_spin_trylock,
36	       GLIBC_2_2)
37#endif
38