1/* Copyright (C) 2002-2021 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	4(%esp), %edx
24	movl	$1, %eax
25	xorl	%ecx, %ecx
26	lock
27	cmpxchgl %ecx, (%edx)
28	movl	$EBUSY, %eax
29#ifdef HAVE_CMOV
30	cmovel	%ecx, %eax
31#else
32	jne	0f
33	movl	%ecx, %eax
340:
35#endif
36	ret
37END (__pthread_spin_trylock)
38versioned_symbol (libc, __pthread_spin_trylock, pthread_spin_trylock,
39		  GLIBC_2_34)
40
41#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
42compat_symbol (libpthread, __pthread_spin_trylock, pthread_spin_trylock,
43	       GLIBC_2_2)
44#endif
45