linux-kernel - Re: [PATCH 07/30] perf tools: Add reference counting for thread

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Date:	Mon, 15 Jun 2015 23:28:41 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Andi Kleen <ak@...ux.intel.com>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 07/30] perf tools: Add reference counting for thread_map
 object

On Mon, Jun 15, 2015 at 04:25:44PM -0300, Arnaldo Carvalho de Melo wrote:
> 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().

ook, will repost with the get function fix

thanks,
jirka
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