[Mesa-dev] [PATCH] glsl/list: Add a foreach_list_typed_safe_reverse macro

[Connor Abbott]

FWIW, Ian commented on my patch to add foreach_list_typed_reverse that
we shouldn't merge it until it had users so people wouldn't try to
remove it -- it seems like this has the same issue. So either merge
both of them at the same time, or neither until NIR gets merged...

Connor


On Fri, Nov 7, 2014 at 9:32 PM, Jason Ekstrand <jason at jlekstrand.net> wrote:
> ---
>  src/glsl/list.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/src/glsl/list.h b/src/glsl/list.h
> index 1d18ec9..1fb9178 100644
> --- a/src/glsl/list.h
> +++ b/src/glsl/list.h
> @@ -673,4 +673,13 @@ inline void exec_node::insert_before(exec_list *before)
>          __node = __next, __next =                                          \
>             exec_node_data(__type, (__next)->__field.next, __field))
>
> +#define foreach_list_typed_safe_reverse(__type, __node, __field, __list)   \
> +   for (__type * __node =                                                  \
> +           exec_node_data(__type, (__list)->tail_pred, __field),           \
> +               * __prev =                                                  \
> +           exec_node_data(__type, (__node)->__field.prev, __field);        \
> +        __prev != NULL;                                                    \
> +        __node = __prev, __prev =                                          \
> +           exec_node_data(__type, (__prev)->__field.prev, __field))
> +
>  #endif /* LIST_CONTAINER_H */
> --
> 2.1.0
>
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