From: Arnaldo Carvalho de Melo <acme@redhat.com>
To: Feng Tang <feng.tang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>,
mingo@elte.hu, a.p.zijlstra@chello.nl, andi@firstfloor.org,
dsahern@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 7/9] perf header: Add check_perf_magic() func
Date: Tue, 25 Sep 2012 08:22:36 -0300 [thread overview]
Message-ID: <20120925112236.GD28902@infradead.org> (raw)
In-Reply-To: <20120925162140.4ecf3d72@feng-i7>
Em Tue, Sep 25, 2012 at 04:21:40PM +0800, Feng Tang escreveu:
> On Tue, 25 Sep 2012 11:07:15 +0900
> Namhyung Kim <namhyung@kernel.org> wrote:
>
> > On Mon, 24 Sep 2012 23:24:09 +0800, Feng Tang wrote:
> > [snip]
> > > +/* Return 0 if matched */
> > > +int check_perf_magic(u64 magic)
> > > +{
> > > + if (!memcmp(&magic, __perf_magic1, sizeof(magic))
> > > + || magic == __perf_magic2
> > > + || magic == __perf_magic2_sw)
> > > + return 0;
> > > +
> > > + return -1;
> > > +}
> >
> > Just an idea. How about returning version number instead of 0 so that
> > it can be used elsewhere those check is needed and possibly wants to
> > know the version number also?
> Sounds ok to me, I can add that if nobody has objection.
Leave it for when we need it?
What we need now is to see if a file is a perf.data file, so I think the
function is good as is.
Minor nitpicks: use bool, rename it to is_perf_magic(), no need for that
comment then, it becomes obvious from the function name :-)
- Arnaldo
next prev parent reply other threads:[~2012-09-25 11:22 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-24 15:24 [PATCH v3 0/9] perf tools: Add script browser and runtime data file switch Feng Tang
2012-09-24 15:24 ` [PATCH v3 1/9] perf hists: Move hists_init() from util/evsel.c to util/hist.c Feng Tang
2012-09-24 16:02 ` Arnaldo Carvalho de Melo
2012-09-25 1:25 ` Namhyung Kim
2012-09-25 11:05 ` Arnaldo Carvalho de Melo
2012-09-25 12:59 ` Namhyung Kim
2012-09-25 13:30 ` perf tools regression testing was " Arnaldo Carvalho de Melo
2012-09-25 13:47 ` Namhyung Kim
2012-09-25 14:10 ` Arnaldo Carvalho de Melo
2012-09-25 8:03 ` Feng Tang
2012-09-24 15:24 ` [PATCH v3 2/9] perf tool: Add a global variable "const char *input_name" Feng Tang
2012-09-24 15:24 ` [PATCH v3 3/9] perf script: Add more filter to find_scripts() Feng Tang
2012-09-25 1:47 ` Namhyung Kim
2012-09-26 8:56 ` Feng Tang
2012-09-27 4:45 ` Namhyung Kim
2012-09-27 10:39 ` Namhyung Kim
2012-09-24 15:24 ` [PATCH v3 4/9] perf ui/browser: Add a browser for perf script Feng Tang
2012-09-24 15:24 ` [PATCH v3 5/9] perf ui/browser: Integrate script browser into annotation browser Feng Tang
2012-09-24 15:24 ` [PATCH v3 6/9] perf ui/browser: Integrate script browser into main hists browser Feng Tang
2012-09-24 15:24 ` [PATCH v3 7/9] perf header: Add check_perf_magic() func Feng Tang
2012-09-24 16:01 ` Arnaldo Carvalho de Melo
2012-09-25 2:07 ` Namhyung Kim
2012-09-25 8:21 ` Feng Tang
2012-09-25 11:22 ` Arnaldo Carvalho de Melo [this message]
2012-09-24 15:24 ` [PATCH v3 8/9] perf hists browser: Add option for runtime switching perf data file Feng Tang
2012-09-25 2:11 ` Namhyung Kim
2012-09-25 8:20 ` Feng Tang
2012-09-25 11:17 ` Arnaldo Carvalho de Melo
2012-09-26 7:57 ` Feng Tang
2012-09-27 4:02 ` Namhyung Kim
2012-09-27 5:43 ` Feng Tang
2012-09-24 15:24 ` [PATCH v3 9/9] perf report: Enable the runtime switching of " Feng Tang
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