libperf: Add perf_evlist__new() function

Add perf_evlist__new() function to create and init a perf_evlist struct
dynamicaly.

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/20190721112506.12306-46-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 1b27fd2..0517deb 100644 (file)
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -3,6 +3,7 @@
 #include <linux/list.h>
 #include <internal/evlist.h>
 #include <internal/evsel.h>
+#include <linux/zalloc.h>
 
 void perf_evlist__init(struct perf_evlist *evlist)
 {
@@ -23,3 +24,13 @@ void perf_evlist__remove(struct perf_evlist *evlist,
        list_del_init(&evsel->node);
        evlist->nr_entries -= 1;
 }
+
+struct perf_evlist *perf_evlist__new(void)
+{
+       struct perf_evlist *evlist = zalloc(sizeof(*evlist));
+
+       if (evlist != NULL)
+               perf_evlist__init(evlist);
+
+       return evlist;
+}

diff --git a/tools/perf/lib/include/perf/evlist.h b/tools/perf/lib/include/perf/evlist.h
index e0c8799..7255a60 100644 (file)
--- a/tools/perf/lib/include/perf/evlist.h
+++ b/tools/perf/lib/include/perf/evlist.h
@@ -12,5 +12,6 @@ LIBPERF_API void perf_evlist__add(struct perf_evlist *evlist,
                                  struct perf_evsel *evsel);
 LIBPERF_API void perf_evlist__remove(struct perf_evlist *evlist,
                                     struct perf_evsel *evsel);
+LIBPERF_API struct perf_evlist *perf_evlist__new(void);
 
 #endif /* __LIBPERF_EVLIST_H */

diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index e38473a..5e685d6 100644 (file)
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -12,6 +12,7 @@ LIBPERF_0.0.1 {
                perf_thread_map__get;
                perf_thread_map__put;
                perf_evsel__init;
+               perf_evlist__new;
                perf_evlist__init;
                perf_evlist__add;
                perf_evlist__remove;