lkml.org 
[lkml]   [2017]   [Feb]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v2 1/4] perf tools: Create for_each_event macro for tracepoints iteration
From
Date
Hi, Arnaldo :)

On 01/31/2017 09:21 PM, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jan 31, 2017 at 08:38:28PM +0900, Taeung Song escreveu:
>> Such as for_each_subsystem and for_each_event in util/parse-events.c,
>> add new macros 'for_each_event' for easy iteration over the tracepoints
>> in order to be more compact and readable.
>
> Looks ok, applied, but look below for some minor suggestions.
>
> - Arnaldo
>
>> Cc: Steven Rostedt <rostedt@goodmis.org>
>> Cc: Frederic Weisbecker <fweisbec@gmail.com>
>> Cc: Jiri Olsa <jolsa@kernel.org>
>> Cc: Namhyung Kim <namhyung@kernel.org>
>> Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
>> ---
>> tools/perf/util/trace-event-info.c | 38 ++++++++++++++++++--------------------
>> 1 file changed, 18 insertions(+), 20 deletions(-)
>>
>> diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
>> index ceb0e27..fb6d95d 100644
>> --- a/tools/perf/util/trace-event-info.c
>> +++ b/tools/perf/util/trace-event-info.c
>> @@ -170,6 +170,12 @@ static bool name_in_tp_list(char *sys, struct tracepoint_path *tps)
>> return false;
>> }
>>
>> +#define for_each_event(dir, dent, tps) \
>> + while ((dent = readdir(dir))) \
>> + if (dent->d_type == DT_DIR && \
>> + (strcmp(dent->d_name, ".")) && \
>> + (strcmp(dent->d_name, ".."))) \
>> +
>> static int copy_event_system(const char *sys, struct tracepoint_path *tps)
>> {
>> struct dirent *dent;
>> @@ -186,12 +192,10 @@ static int copy_event_system(const char *sys, struct tracepoint_path *tps)
>> return -errno;
>> }
>>
>> - while ((dent = readdir(dir))) {
>> - if (dent->d_type != DT_DIR ||
>> - strcmp(dent->d_name, ".") == 0 ||
>> - strcmp(dent->d_name, "..") == 0 ||
>> - !name_in_tp_list(dent->d_name, tps))
>> + for_each_event(dir, dent, tps) {
>> + if (!name_in_tp_list(dent->d_name, tps))
>> continue;
>> +
>> if (asprintf(&format, "%s/%s/format", sys, dent->d_name) < 0) {
>> err = -ENOMEM;
>> goto out;
>> @@ -210,12 +214,10 @@ static int copy_event_system(const char *sys, struct tracepoint_path *tps)
>> }
>>
>> rewinddir(dir);
>> - while ((dent = readdir(dir))) {
>> - if (dent->d_type != DT_DIR ||
>> - strcmp(dent->d_name, ".") == 0 ||
>> - strcmp(dent->d_name, "..") == 0 ||
>> - !name_in_tp_list(dent->d_name, tps))
>> + for_each_event(dir, dent, tps) {
>> + if (!name_in_tp_list(dent->d_name, tps))
>> continue;
>> +
>> if (asprintf(&format, "%s/%s/format", sys, dent->d_name) < 0) {
>> err = -ENOMEM;
>> goto out;
>> @@ -290,13 +292,11 @@ static int record_event_files(struct tracepoint_path *tps)
>> goto out;
>> }
>>
>> - while ((dent = readdir(dir))) {
>> - if (dent->d_type != DT_DIR ||
>> - strcmp(dent->d_name, ".") == 0 ||
>> - strcmp(dent->d_name, "..") == 0 ||
>> - strcmp(dent->d_name, "ftrace") == 0 ||
>> + for_each_event(dir, dent, tps) {
>> + if (!strcmp(dent->d_name, "ftrace") ||
>
> the existing style was == 0, you switched it to !, equivalent, but
> gratuitous, keeping the existing style would make reviewing slightly
> faster, as the pattern wouldn't have changed.
>

I understood !!
In the future, I'll think this when making some patches.

Thanks,
Taeung

\
 
 \ /
  Last update: 2017-02-01 08:03    [W:0.062 / U:0.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site