perf stat: Introduce perf_counts__(new|delete|reset) functions

Move 'struct perf_counts' allocation|free|reset code into separate
functions.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1434269985-521-13-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 23 insertions, 5 deletions

diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index ac589b6b8bce..4014b709f956 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -95,20 +95,38 @@ void perf_stat_evsel_id_init(struct perf_evsel *evsel)
 	}
 }
 
+struct perf_counts *perf_counts__new(int ncpus)
+{
+	int size = sizeof(struct perf_counts) +
+		   ncpus * sizeof(struct perf_counts_values);
+
+	return zalloc(size);
+}
+
+void perf_counts__delete(struct perf_counts *counts)
+{
+	free(counts);
+}
+
+static void perf_counts__reset(struct perf_counts *counts, int ncpus)
+{
+	memset(counts, 0, (sizeof(*counts) +
+	       (ncpus * sizeof(struct perf_counts_values))));
+}
+
 void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus)
 {
-	memset(evsel->counts, 0, (sizeof(*evsel->counts) +
-				 (ncpus * sizeof(struct perf_counts_values))));
+	perf_counts__reset(evsel->counts, ncpus);
 }
 
 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
 {
-	evsel->counts = zalloc((sizeof(*evsel->counts) +
-				(ncpus * sizeof(struct perf_counts_values))));
+	evsel->counts = perf_counts__new(ncpus);
 	return evsel->counts != NULL ? 0 : -ENOMEM;
 }
 
 void perf_evsel__free_counts(struct perf_evsel *evsel)
 {
-	zfree(&evsel->counts);
+	perf_counts__delete(evsel->counts);
+	evsel->counts = NULL;
 }