perf_evlist__next
struct perf_evsel *next = perf_evlist__next(evlist, evsel);
LIBPERF_API struct perf_evsel* perf_evlist__next(struct perf_evlist *evlist,
for ((pos) = perf_evlist__next((evlist), NULL); \
(pos) = perf_evlist__next((evlist), (pos)))