1 | /* Copyright (C) 2002-2024 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 | |
22 | ENTRY (__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 |
34 | 0: |
35 | #endif |
36 | ret |
37 | END (__pthread_spin_trylock) |
38 | versioned_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) |
42 | compat_symbol (libpthread, __pthread_spin_trylock, pthread_spin_trylock, |
43 | GLIBC_2_2) |
44 | #endif |
45 | |