[tip:perf/core] perf ordered_events: Introduce reinit()

[tip-bot for Wang Nan]

Commit-ID:  4532f642974d871f9a50e9a09bc482eaed5394f6
Gitweb:     http://git.kernel.org/tip/4532f642974d871f9a50e9a09bc482eaed5394f6
Author:     Wang Nan <wangnan0@xxxxxxxxxx>
AuthorDate: Wed, 13 Apr 2016 08:21:04 +0000
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 14 Apr 2016 08:57:54 -0300

perf ordered_events: Introduce reinit()

'perf record' will use this when outputting multiple perf.data files.

Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Zefan Li <lizefan@xxxxxxxxxx>
Cc: pi3orama@xxxxxxx
Link: http://lkml.kernel.org/r/1460535673-159866-2-git-send-email-wangnan0@xxxxxxxxxx
Signed-off-by: He Kuang <hekuang@xxxxxxxxxx>
[ Split from larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/ordered-events.c | 9 +++++++++
 tools/perf/util/ordered-events.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
index b1b9e23..fe84df1 100644
--- a/tools/perf/util/ordered-events.c
+++ b/tools/perf/util/ordered-events.c
@@ -308,3 +308,12 @@ void ordered_events__free(struct ordered_events *oe)
 		free(event);
 	}
 }
+
+void ordered_events__reinit(struct ordered_events *oe)
+{
+	ordered_events__deliver_t old_deliver = oe->deliver;
+
+	ordered_events__free(oe);
+	memset(oe, '\0', sizeof(*oe));
+	ordered_events__init(oe, old_deliver);
+}
diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
index f403991..e11468a 100644
--- a/tools/perf/util/ordered-events.h
+++ b/tools/perf/util/ordered-events.h
@@ -49,6 +49,7 @@ void ordered_events__delete(struct ordered_events *oe, struct ordered_event *eve
 int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
 void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver);
 void ordered_events__free(struct ordered_events *oe);
+void ordered_events__reinit(struct ordered_events *oe);
 
 static inline
 void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)