mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-03 04:01:43 +08:00
47 lines
1.2 KiB
ArmAsm
47 lines
1.2 KiB
ArmAsm
/* Copyright (C) 2002-2016 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
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 <pthread-errnos.h>
|
|
|
|
|
|
#ifdef UP
|
|
# define LOCK
|
|
#else
|
|
# define LOCK lock
|
|
#endif
|
|
|
|
.globl pthread_spin_trylock
|
|
.type pthread_spin_trylock,@function
|
|
.align 16
|
|
pthread_spin_trylock:
|
|
movl 4(%esp), %edx
|
|
movl $1, %eax
|
|
xorl %ecx, %ecx
|
|
LOCK
|
|
cmpxchgl %ecx, (%edx)
|
|
movl $EBUSY, %eax
|
|
#ifdef HAVE_CMOV
|
|
cmovel %ecx, %eax
|
|
#else
|
|
jne 0f
|
|
movl %ecx, %eax
|
|
0:
|
|
#endif
|
|
ret
|
|
.size pthread_spin_trylock,.-pthread_spin_trylock
|