Re: [PATCH 07/30] perf tools: Add reference counting for thread_map object

Arnaldo Carvalho de Melo
2015-06-15T20:02:19Z

Em Sun, Jun 14, 2015 at 10:19:22AM +0200, Jiri Olsa escreveu:
> Adding refference counting for thread_map object, so
> it could be easily shared among other objects.
>
> Using thread_map__put instead thread_map__delete and making
> thread_map__delete static.

<SNIP>

> +struct thread_map *thread_map__get(struct thread_map *map)
> +{
> + atomic_inc(&map->refcnt);
> + return map;
> +}
> +
> +void thread_map__put(struct thread_map *map)
> +{
> + if (map && atomic_dec_and_test(&map->refcnt))
> + thread_map__delete(map);
> }

See comment on the other struct being refcounted, get/put should
both accept NULL maps, to avoid having to check it in the users,
just like with free().

- Arnaldo