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Subject[PATCH 74/75] perf ordered_events: Add first_time() method
Date
From: Jiri Olsa <jolsa@kernel.org>

To get the timestamp in the first event in the queue.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Dmitry Levin <ldv@altlinux.org>
Cc: Eugene Syromiatnikov <esyr@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@uudg.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/n/tip-appp27jw1ul8kgg872j43r5o@git.kernel.org
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/ordered-events.c | 11 +++++++++++
tools/perf/util/ordered-events.h | 1 +
2 files changed, 12 insertions(+)

diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
index 46965643020b..897589507d97 100644
--- a/tools/perf/util/ordered-events.c
+++ b/tools/perf/util/ordered-events.c
@@ -343,6 +343,17 @@ int ordered_events__flush_time(struct ordered_events *oe, u64 timestamp)
return __ordered_events__flush(oe, OE_FLUSH__TIME, timestamp);
}

+u64 ordered_events__first_time(struct ordered_events *oe)
+{
+ struct ordered_event *event;
+
+ if (list_empty(&oe->events))
+ return 0;
+
+ event = list_first_entry(&oe->events, struct ordered_event, list);
+ return event->timestamp;
+}
+
void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver,
void *data)
{
diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
index f352af20e167..0920fb0ec6cc 100644
--- a/tools/perf/util/ordered-events.h
+++ b/tools/perf/util/ordered-events.h
@@ -61,6 +61,7 @@ void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t d
void *data);
void ordered_events__free(struct ordered_events *oe);
void ordered_events__reinit(struct ordered_events *oe);
+u64 ordered_events__first_time(struct ordered_events *oe);

static inline
void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)
--
2.19.2
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