libperf: Add perf_evsel__delete() function

Add the perf_evsel__delete() function to delete a perf_evsel instance.
Signed-off-by: Jiri 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/20190721112506.12306-50-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/lib/evsel.c

@@ -3,6 +3,7 @@
 #include <linux/list.h>
 #include <internal/evsel.h>
 #include <linux/zalloc.h>
+#include <stdlib.h>
 
 void perf_evsel__init(struct perf_evsel *evsel, struct perf_event_attr *attr)
 {
@@ -19,3 +20,8 @@ struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr)
 
 	return evsel;
 }
+
+void perf_evsel__delete(struct perf_evsel *evsel)
+{
+	free(evsel);
+}

tools/perf/lib/include/perf/evsel.h

@@ -10,5 +10,6 @@ struct perf_event_attr;
 LIBPERF_API void perf_evsel__init(struct perf_evsel *evsel,
 				  struct perf_event_attr *attr);
 LIBPERF_API struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr);
+LIBPERF_API void perf_evsel__delete(struct perf_evsel *evsel);
 
 #endif /* __LIBPERF_EVSEL_H */

tools/perf/lib/libperf.map

@@ -12,6 +12,7 @@ LIBPERF_0.0.1 {
 		perf_thread_map__get;
 		perf_thread_map__put;
 		perf_evsel__new;
+		perf_evsel__delete;
 		perf_evsel__init;
 		perf_evlist__new;
 		perf_evlist__delete;