[PATCH wayland] wayland-server: Add a wl_resource_for_each_safe macro

[Kristian Høgsberg]

On Fri, Sep 06, 2013 at 05:56:27PM +0100, Rob Bradford wrote:
> From: Rob Bradford <rob at linux.intel.com>
> 
> A version of wl_resource_for_each that is safe for iteration when items
> in the list are removed.

Looks good, committed.
Kristian

> ---
>  src/wayland-server.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/src/wayland-server.h b/src/wayland-server.h
> index d77050d..c0365c0 100644
> --- a/src/wayland-server.h
> +++ b/src/wayland-server.h
> @@ -313,6 +313,14 @@ wl_resource_get_destroy_listener(struct wl_resource *resource,
>  	     wl_resource_get_link(resource) != (list);				\
>  	     resource = wl_resource_from_link(wl_resource_get_link(resource)->next))
>  
> +#define wl_resource_for_each_safe(resource, tmp, list)					\
> +	for (resource = 0, tmp = 0,							\
> +	     resource = wl_resource_from_link((list)->next),	\
> +	     tmp = wl_resource_from_link((list)->next->next);	\
> +	     wl_resource_get_link(resource) != (list);				\
> +	     resource = tmp,							\
> +	     tmp = wl_resource_from_link(wl_resource_get_link(resource)->next))
> +
>  struct wl_shm_buffer;
>  
>  struct wl_shm_buffer *
> -- 
> 1.8.3.1
> 
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