summaryrefslogtreecommitdiff
path: root/chromium/cc/scheduler/time_source.h
diff options
context:
space:
mode:
authorZeno Albisser <zeno.albisser@digia.com>2013-08-15 21:46:11 +0200
committerZeno Albisser <zeno.albisser@digia.com>2013-08-15 21:46:11 +0200
commit679147eead574d186ebf3069647b4c23e8ccace6 (patch)
treefc247a0ac8ff119f7c8550879ebb6d3dd8d1ff69 /chromium/cc/scheduler/time_source.h
downloadqtwebengine-chromium-679147eead574d186ebf3069647b4c23e8ccace6.tar.gz
Initial import.
Diffstat (limited to 'chromium/cc/scheduler/time_source.h')
-rw-r--r--chromium/cc/scheduler/time_source.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/chromium/cc/scheduler/time_source.h b/chromium/cc/scheduler/time_source.h
new file mode 100644
index 00000000000..e45ffbb95aa
--- /dev/null
+++ b/chromium/cc/scheduler/time_source.h
@@ -0,0 +1,51 @@
+// Copyright 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_SCHEDULER_TIME_SOURCE_H_
+#define CC_SCHEDULER_TIME_SOURCE_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/time/time.h"
+#include "cc/base/cc_export.h"
+
+namespace cc {
+
+class TimeSourceClient {
+ public:
+ virtual void OnTimerTick() = 0;
+
+ protected:
+ virtual ~TimeSourceClient() {}
+};
+
+// An generic interface for getting a reliably-ticking timesource of
+// a specified rate.
+//
+// Be sure to call SetActive(false) before releasing your reference to the
+// timer, or it will keep on ticking!
+class CC_EXPORT TimeSource : public base::RefCounted<TimeSource> {
+ public:
+ virtual void SetClient(TimeSourceClient* client) = 0;
+
+ // If transitioning from not active to active, SetActive will return the
+ // timestamp of the most recenly missed tick that did not have OnTimerTick
+ // called.
+ virtual base::TimeTicks SetActive(bool active) = 0;
+
+ virtual bool Active() const = 0;
+ virtual void SetTimebaseAndInterval(base::TimeTicks timebase,
+ base::TimeDelta interval) = 0;
+ virtual base::TimeTicks LastTickTime() = 0;
+ virtual base::TimeTicks NextTickTime() = 0;
+
+ protected:
+ virtual ~TimeSource() {}
+
+ private:
+ friend class base::RefCounted<TimeSource>;
+};
+
+} // namespace cc
+
+#endif // CC_SCHEDULER_TIME_SOURCE_H_