linux-kernel - Re: [PATCH 6/7] perf util: Add findnew method to intlist

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Date:	Tue, 8 Oct 2013 10:22:50 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	David Ahern <dsahern@...il.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung.kim@....com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 6/7] perf util: Add findnew method to intlist

Em Sat, Sep 28, 2013 at 01:13:03PM -0600, David Ahern escreveu:
> Similar to other findnew based methods if the requested
> object is not found, add it to the list.

> +struct int_node *intlist__findnew(struct intlist *ilist, int i)
> +{
> +	struct int_node *node = intlist__find(ilist, i);
> +
> +	if ((node == NULL) && (intlist__add(ilist, i) == 0))
> +		node = intlist__find(ilist, i);
> +
> +	return node;


This is what I should have pointed out earlier: Can't we have a
find_and_add_if_not_found routine as we have elsewhere?

Calling intlist__find() after intlist__add() looks really ugly :-\

Please take a look at my perf/core branch, several patches of this
series are there, one with minor change.

- Arnaldo

> +}
> +
>  static int intlist__parse_list(struct intlist *ilist, const char *s)
>  {
>  	char *sep;
> diff --git a/tools/perf/util/intlist.h b/tools/perf/util/intlist.h
> index 0eb00ac..aa6877d 100644
> --- a/tools/perf/util/intlist.h
> +++ b/tools/perf/util/intlist.h
> @@ -24,6 +24,7 @@ int intlist__add(struct intlist *ilist, int i);
>  
>  struct int_node *intlist__entry(const struct intlist *ilist, unsigned int idx);
>  struct int_node *intlist__find(struct intlist *ilist, int i);
> +struct int_node *intlist__findnew(struct intlist *ilist, int i);
>  
>  static inline bool intlist__has_entry(struct intlist *ilist, int i)
>  {
> -- 
> 1.7.10.1
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