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04277e02 | 1 | /* Copyright (C) 2003-2019 Free Software Foundation, Inc. |
a54e8d33 UD |
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 | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
a54e8d33 UD |
17 | |
18 | #include "pthreadP.h" | |
19 | ||
20 | int | |
bd2260a2 | 21 | pthread_spin_lock (pthread_spinlock_t *lock) |
a54e8d33 UD |
22 | { |
23 | unsigned int val; | |
24 | ||
25 | do | |
26 | asm volatile ("tas.b @%1; movt %0" | |
27 | : "=&r" (val) | |
28 | : "r" (lock) | |
29 | : "memory"); | |
30 | while (val == 0); | |
31 | ||
32 | return 0; | |
33 | } |