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Re: [Qemu-devel] [RFC v1 05/12] atomic: introduce cmpxchg_bool
From: |
Sergey Fedorov |
Subject: |
Re: [Qemu-devel] [RFC v1 05/12] atomic: introduce cmpxchg_bool |
Date: |
Fri, 3 Jun 2016 19:45:05 +0300 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 |
On 15/04/16 17:23, Alex Bennée wrote:
> diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h
> index 5dba7db..94e7110 100644
> --- a/include/qemu/atomic.h
> +++ b/include/qemu/atomic.h
> @@ -123,6 +123,16 @@
> _old; \
> })
>
> +#define atomic_bool_cmpxchg(ptr, old, new) \
> + ({ \
> + typeof(*ptr) _old = (old), _new = (new); \
> + bool r; \
> + r = __atomic_compare_exchange(ptr, &_old, &_new, false, \
> + __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \
> + r; \
> + })
> +
> +
Could be more simple:
#define atomic_bool_cmpxchg(ptr, old, new) \
({ \
typeof(*ptr) _old = (old), _new = (new); \
__atomic_compare_exchange(ptr, &_old, &_new, false, \
__ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \
})
Kind regards,
Sergey
- Re: [Qemu-devel] [RFC v1 05/12] atomic: introduce cmpxchg_bool,
Sergey Fedorov <=