diff options
Diffstat (limited to 'src/compat/atomic/atomic.h')
| -rw-r--r-- | src/compat/atomic/atomic.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/compat/atomic/atomic.h b/src/compat/atomic/atomic.h new file mode 100644 index 0000000..c8c1c90 --- /dev/null +++ b/src/compat/atomic/atomic.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef atomic_try_cmpxchg + +#define __atomic_try_cmpxchg(type, _p, _po, _n) \ +({ \ + typeof(_po) __po = (_po); \ + typeof(*(_po)) __o = *__po; \ + *__po = atomic_cmpxchg##type((_p), __o, (_n)); \ + (*__po == __o); \ +}) + +#define atomic_try_cmpxchg(_p, _po, _n) __atomic_try_cmpxchg(, _p, _po, _n) +#define atomic_try_cmpxchg_relaxed(_p, _po, _n) __atomic_try_cmpxchg(_relaxed, _p, _po, _n) +#define atomic_try_cmpxchg_acquire(_p, _po, _n) __atomic_try_cmpxchg(_acquire, _p, _po, _n) +#define atomic_try_cmpxchg_release(_p, _po, _n) __atomic_try_cmpxchg(_release, _p, _po, _n) + +#else /* atomic_try_cmpxchg */ +#define atomic_try_cmpxchg_relaxed atomic_try_cmpxchg +#define atomic_try_cmpxchg_acquire atomic_try_cmpxchg +#define atomic_try_cmpxchg_release atomic_try_cmpxchg +#endif /* atomic_try_cmpxchg */ |