| 1 | /* Copyright (C) 2003-2024 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include "pthreadP.h" |
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| 19 | #include <shlib-compat.h> |
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| 20 | |
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| 21 | int |
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| 22 | __pthread_spin_lock (pthread_spinlock_t *lock) |
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| 23 | { |
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| 24 | unsigned int __tmp; |
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| 25 | |
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| 26 | asm volatile ( |
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| 27 | "1: lwarx %0,0,%1" MUTEX_HINT_ACQ "\n" |
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| 28 | " cmpwi 0,%0,0\n" |
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| 29 | " bne- 2f\n" |
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| 30 | " stwcx. %2,0,%1\n" |
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| 31 | " bne- 2f\n" |
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| 32 | __ARCH_ACQ_INSTR "\n" |
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| 33 | " .subsection 1\n" |
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| 34 | "2: lwzx %0,0,%1\n" |
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| 35 | " cmpwi 0,%0,0\n" |
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| 36 | " bne 2b\n" |
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| 37 | " b 1b\n" |
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| 38 | " .previous" |
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| 39 | : "=&r" (__tmp) |
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| 40 | : "r" (lock), "r" (1) |
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| 41 | : "cr0" , "memory" ); |
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| 42 | return 0; |
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| 43 | } |
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| 44 | versioned_symbol (libc, __pthread_spin_lock, pthread_spin_lock, GLIBC_2_34); |
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| 45 | |
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| 46 | #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34) |
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| 47 | compat_symbol (libpthread, __pthread_spin_lock, pthread_spin_lock, GLIBC_2_2); |
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| 48 | #endif |
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| 49 | |
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