[PATCH 1/3] perf tools: Introduce perf_evlist__start_workload_ex()

[Namhyung Kim]

The perf_evlist__start_workload_ex() does same as __start_work() but
also invokes callback which does additional work for each command.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
 tools/perf/util/evlist.c | 11 +++++++++++
 tools/perf/util/evlist.h |  4 ++++
 2 files changed, 15 insertions(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index dc1dc2c181ef..bfe455ec673b 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1505,6 +1505,17 @@ int perf_evlist__start_workload(struct perf_evlist *evlist)
 	return 0;
 }
 
+int perf_evlist__start_workload_ex(struct perf_evlist *evlist,
+				   workload_callback_t callback, void *arg)
+{
+	int ret = callback(evlist, arg);
+
+	if (ret == 0)
+		ret = perf_evlist__start_workload(evlist);
+
+	return ret;
+}
+
 int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
 			      struct perf_sample *sample)
 {
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 955bf31b7dd3..6212f036c134 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -123,6 +123,10 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist,
 						     void *ucontext));
 int perf_evlist__start_workload(struct perf_evlist *evlist);
 
+typedef int (*workload_callback_t)(struct perf_evlist *evlist, void *arg);
+int perf_evlist__start_workload_ex(struct perf_evlist *evlist,
+				   workload_callback_t callback, void *arg);
+
 struct option;
 
 int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str);
-- 
2.4.0

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