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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef __TOOLS_LINUX_ATOMIC_H |
| 3 | #define __TOOLS_LINUX_ATOMIC_H |
| 4 | |
| 5 | #include <asm/atomic.h> |
| 6 | |
| 7 | void atomic_long_set(atomic_long_t *v, long i); |
| 8 | |
| 9 | /* atomic_cmpxchg_relaxed */ |
| 10 | #ifndef atomic_cmpxchg_relaxed |
| 11 | #define atomic_cmpxchg_relaxed atomic_cmpxchg |
| 12 | #define atomic_cmpxchg_release atomic_cmpxchg |
| 13 | #endif /* atomic_cmpxchg_relaxed */ |
| 14 | |
| 15 | static inline bool atomic_try_cmpxchg(atomic_t *ptr, int *oldp, int new) |
| 16 | { |
| 17 | int ret, old = *oldp; |
| 18 | |
| 19 | ret = atomic_cmpxchg(ptr, old, new); |
| 20 | if (ret != old) |
| 21 | *oldp = ret; |
| 22 | return ret == old; |
| 23 | } |
| 24 | |
| 25 | static inline bool atomic_inc_unless_negative(atomic_t *v) |
| 26 | { |
| 27 | int c = atomic_read(v); |
| 28 | |
| 29 | do { |
| 30 | if (unlikely(c < 0)) |
| 31 | return false; |
| 32 | } while (!atomic_try_cmpxchg(v, &c, c + 1)); |
| 33 | |
| 34 | return true; |
| 35 | } |
| 36 | |
| 37 | #endif /* __TOOLS_LINUX_ATOMIC_H */ |
| 38 |
Warning: That file was not part of the compilation database. It may have many parsing errors.