Add unit tests for duration metrics
As a side-effect, move utils::GetMonotonicTime() into the newly added
ClockInterface type.
BUG=None
TEST=Unit tests pass
Change-Id: I972a7e4ba37b63f96348fbeda901697b8ba2fc05
Reviewed-on: https://gerrit.chromium.org/gerrit/48814
Reviewed-by: Chris Sosa <sosa@chromium.org>
Tested-by: David Zeuthen <zeuthen@chromium.org>
Commit-Queue: David Zeuthen <zeuthen@chromium.org>
diff --git a/clock.cc b/clock.cc
new file mode 100644
index 0000000..96979f9
--- /dev/null
+++ b/clock.cc
@@ -0,0 +1,28 @@
+// Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "update_engine/clock.h"
+
+#include <time.h>
+
+namespace chromeos_update_engine {
+
+base::Time Clock::GetWallclockTime() {
+ return base::Time::Now();
+}
+
+base::Time Clock::GetMonotonicTime() {
+ struct timespec now_ts;
+ if (clock_gettime(CLOCK_MONOTONIC_RAW, &now_ts) != 0) {
+ // Avoid logging this as an error as call-sites may call this very
+ // often and we don't want to fill up the disk...
+ return base::Time();
+ }
+ struct timeval now_tv;
+ now_tv.tv_sec = now_ts.tv_sec;
+ now_tv.tv_usec = now_ts.tv_nsec/base::Time::kNanosecondsPerMicrosecond;
+ return base::Time::FromTimeVal(now_tv);
+}
+
+} // namespace chromeos_update_engine