linux-kernel - Re: [PATCH] perf ui/gtk: Ensure not to call gtk_main

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Date:	Sat, 18 Aug 2012 10:52:03 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf ui/gtk: Ensure not to call gtk_main_quit() twice

On Fri, Aug 17, 2012 at 7:56 PM, Namhyung Kim <namhyung@...nel.org> wrote:
> Currently the gtk_main_quit() is called twice when perf exits so the
> following warning is emitted:
>
>   [penberg@tux perf]$ ./perf report --gtk
>   ^Cperf: Interrupt
>
>   (perf:4048): Gtk-CRITICAL **: IA__gtk_main_quit: assertion `main_loops != NULL' failed
>
> Fix it by not to call it unnecessarily.
>
> Reported-by: Pekka Enberg <penberg@...nel.org>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/ui/gtk/setup.c |    2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/tools/perf/ui/gtk/setup.c b/tools/perf/ui/gtk/setup.c
> index ad40b3626fdb..ec1ee26b485a 100644
> --- a/tools/perf/ui/gtk/setup.c
> +++ b/tools/perf/ui/gtk/setup.c
> @@ -13,6 +13,8 @@ int perf_gtk__init(void)
>
>  void perf_gtk__exit(bool wait_for_ok __used)
>  {
> +       if (!perf_gtk__is_active_context(pgctx))
> +               return;
>         perf_error__unregister(&perf_gtk_eops);
>         gtk_main_quit();
>  }

Wouldn't it be nicer to rearrange the callers so that perf_gtk__exit()
is not called twice?
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