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Commit 651bf38c authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

libperf: Add perf_evlist__for_each_evsel() iterator 



Add a perf_evlist__for_each_evsel() macro to iterate perf_evsel objects
in evlist.

Introduce the perf_evlist__next() function to do that without exposing
'struct perf_evlist' internals.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-48-jolsa@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 63bd5dfa

tools/perf/lib/evlist.c

+20 −0
Original line number Diff line number Diff line
@@ -34,3 +34,23 @@ struct perf_evlist *perf_evlist__new(void) 


	return evlist;

}



struct perf_evsel *

perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)

{

	struct perf_evsel *next;



	if (!prev) {

		next = list_first_entry(&evlist->entries,

					struct perf_evsel,

					node);

	} else {

		next = list_next_entry(prev, node);

	}



	/* Empty list is noticed here so don't need checking on entry. */

	if (&next->node == &evlist->entries)

		return NULL;



	return next;

}

tools/perf/lib/include/perf/evlist.h

+7 −0
Original line number Diff line number Diff line
@@ -13,5 +13,12 @@ LIBPERF_API void perf_evlist__add(struct perf_evlist *evlist, 
LIBPERF_API void perf_evlist__remove(struct perf_evlist *evlist,

				     struct perf_evsel *evsel);

LIBPERF_API struct perf_evlist *perf_evlist__new(void);

LIBPERF_API struct perf_evsel* perf_evlist__next(struct perf_evlist *evlist,

						 struct perf_evsel *evsel);



#define perf_evlist__for_each_evsel(evlist, pos)	\

	for ((pos) = perf_evlist__next((evlist), NULL);	\

	     (pos) != NULL;				\

	     (pos) = perf_evlist__next((evlist), (pos)))



#endif /* __LIBPERF_EVLIST_H */

tools/perf/lib/libperf.map

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ LIBPERF_0.0.1 { 
		perf_evlist__init;

		perf_evlist__add;

		perf_evlist__remove;

		perf_evlist__next;

	local:

		*;

};