libperf: Introduce perf_evlist__purge()
Add a static perf_evlist__purge() function to purge evsels from a evlist.
Add also perf_evlist__for_each_entry_safe() which is used by
perf_evlist__purge().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-26-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 7ba98f0..9534ad9 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -109,6 +109,18 @@ perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
return next;
}
+static void perf_evlist__purge(struct perf_evlist *evlist)
+{
+ struct perf_evsel *pos, *n;
+
+ perf_evlist__for_each_entry_safe(evlist, n, pos) {
+ list_del_init(&pos->node);
+ perf_evsel__delete(pos);
+ }
+
+ evlist->nr_entries = 0;
+}
+
void perf_evlist__exit(struct perf_evlist *evlist)
{
perf_cpu_map__put(evlist->cpus);
@@ -125,6 +137,7 @@ void perf_evlist__delete(struct perf_evlist *evlist)
perf_evlist__munmap(evlist);
perf_evlist__close(evlist);
+ perf_evlist__purge(evlist);
perf_evlist__exit(evlist);
free(evlist);
}