| 1 | /* Copyright (C) 2003-2024 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 "pthreadP.h" |
|---|
| 19 | #include <shlib-compat.h> |
|---|
| 20 | |
|---|
| 21 | int |
|---|
| 22 | __pthread_spin_lock (pthread_spinlock_t *lock) |
|---|
| 23 | { |
|---|
| 24 | unsigned int val; |
|---|
| 25 | |
|---|
| 26 | do |
|---|
| 27 | asm volatile ("tas.b @%1; movt %0" |
|---|
| 28 | : "=&r" (val) |
|---|
| 29 | : "r" (lock) |
|---|
| 30 | : "memory" ); |
|---|
| 31 | while (val == 0); |
|---|
| 32 | |
|---|
| 33 | return 0; |
|---|
| 34 | } |
|---|
| 35 | versioned_symbol (libc, __pthread_spin_lock, pthread_spin_lock, GLIBC_2_34); |
|---|
| 36 | |
|---|
| 37 | #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34) |
|---|
| 38 | compat_symbol (libpthread, __pthread_spin_lock, pthread_spin_lock, GLIBC_2_2); |
|---|
| 39 | #endif |
|---|
| 40 | |
|---|
