>
> diff --git a/lib/eal/include/generic/rte_pause.h
> b/lib/eal/include/generic/rte_pause.h
> index 668ee4a184..d0c5b5a415 100644
> --- a/lib/eal/include/generic/rte_pause.h
> +++ b/lib/eal/include/generic/rte_pause.h
> @@ -111,6 +111,34 @@ rte_wait_until_equal_64(volatile uint64_t *addr,
> uint64_t expected,
> while (__atomic_load_n(addr, memorder) != expected)
> rte_pause();
> }
> +
> +/*
> + * Wait until *addr breaks the condition, with a relaxed memory
> + * ordering model meaning the loads around this API can be reordered.
> + *
> + * @param addr
> + * A pointer to the memory location.
> + * @param mask
> + * A mask of value bits in interest.
> + * @param cond
> + * A symbol representing the condition.
> + * @param expected
> + * An expected value to be in the memory location.
> + * @param memorder
> + * Two different memory orders that can be specified:
> + * __ATOMIC_ACQUIRE and __ATOMIC_RELAXED. These map to
> + * C++11 memory orders with the same names, see the C++11 standard or
> + * the GCC wiki on atomic synchronization for detailed definition.
> + */
> +#define rte_wait_event(addr, mask, cond, expected, memorder)
> \
> +do {
> \
> + RTE_BUILD_BUG_ON(!__builtin_constant_p(memorder));
> \
> + RTE_BUILD_BUG_ON(memorder != __ATOMIC_ACQUIRE &&
> \
> + memorder != __ATOMIC_RELAXED);
> \
> + typeof(*(addr)) expected_value = (expected);
> \
> + while ((__atomic_load_n((addr), (memorder)) & (mask)) cond
> expected_value) \
> + rte_pause();
> \
> +} while (0)
> #endif
>
> #endif /* _RTE_PAUSE_H_ */
> --
From generic/x86 perspective:
Acked-by: Konstantin Ananyev <[email protected]>
> 2.25.1
