linux-kernel - [PATCH 04/10] perf tool: perf_mmap__read

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Date:   Tue, 10 Oct 2017 10:20:17 -0700
From:   kan.liang@...el.com
To:     acme@...nel.org, peterz@...radead.org, mingo@...hat.com,
        linux-kernel@...r.kernel.org
Cc:     jolsa@...nel.org, wangnan0@...wei.com, hekuang@...wei.com,
        namhyung@...nel.org, alexander.shishkin@...ux.intel.com,
        adrian.hunter@...el.com, ak@...ux.intel.com,
        Kan Liang <kan.liang@...el.com>
Subject: [PATCH 04/10] perf tool: perf_mmap__read_init wrapper for evlist

From: Kan Liang <kan.liang@...el.com>

Add a wrapper perf_evlist__mmap_read_init for perf_mmap__read_init.

Signed-off-by: Kan Liang <kan.liang@...el.com>
---
 tools/perf/util/evlist.c | 9 +++++++++
 tools/perf/util/evlist.h | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index b36211e..f7fefdb 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -781,6 +781,15 @@ int perf_mmap__read_init(struct perf_mmap *md, struct perf_mmap_read *read,
 			     &read->start, &read->end, backward);
 }
 
+int perf_evlist__mmap_read_init(struct perf_evlist *evlist, int idx,
+				struct perf_mmap_read* read, bool backward)
+{
+	struct perf_mmap *md;
+
+	md = backward ? &evlist->backward_mmap[idx] : &evlist->mmap[idx];
+	return perf_mmap__read_init(md, read, evlist->overwrite, backward);
+}
+
 /*
  * Read the ring buffer in the range which specified in struct perf_mmap_read,
  * and write to file.
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 53baf26..f292936 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -209,6 +209,8 @@ int perf_mmap__read_to_file(struct perf_mmap_read *read,
 			    struct perf_data_file *file);
 union perf_event *perf_mmap__read_event(struct perf_mmap_read *read);
 void perf_mmap__read_done(struct perf_mmap_read *read);
+int perf_evlist__mmap_read_init(struct perf_evlist *evlist, int idx,
+				struct perf_mmap_read* read, bool backward);
 
 int perf_evlist__open(struct perf_evlist *evlist);
 void perf_evlist__close(struct perf_evlist *evlist);
-- 
2.5.5