Re: [RFC PATCH 1/4] hazptr: Add initial implementation of hazard pointers

[Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>]

On 2024-09-25 14:47, Mathieu Desnoyers wrote:
[...]

> Like so:
>
> #include <stdio.h>
>
> #define __str_1(x)  #x
> #define __str(x)    __str_1(x)
>
> /* x86-64 */
> #define bne_ptr(_a, _b, _label) \
>      asm goto ( \
>          "cmpq %[a], %[b]\n\t" \
>          "jne %l[" __str(_label) "]\n\t" \
>          : : [a] "r" (_a), [b] "r" (_b) \
>          : : _label)
>
> int x;
>
> int v[2];
>
> int main(void)
> {
>      bne_ptr(v, v + 1, label_same);
>      x = 1;
> label_same:

Note that this label should probably be called "label_ne".
I flipped the macro logic without changing the labels.

Thanks,

Mathieu

>      printf("%d\n", x);
>      return 0;
> }
>
>
> > Regards,
> > Boqun
> >
> > > Thanks,
> > >
> > > Mathieu
> > >
> > > > Regards,
> > > > Boqun
> > > >
> > > > > Have fun,
> > > > >      jonas
> > >
> > > --
> > > Mathieu Desnoyers
> > > EfficiOS Inc.
> > > https://www.efficios.com

--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com