Index: cc/base/delayed_unique_notifier.h |
diff --git a/cc/base/delayed_unique_notifier.h b/cc/base/delayed_unique_notifier.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..f462b9e3b27796fd12ce4328381ace8cbe9d4d7d |
--- /dev/null |
+++ b/cc/base/delayed_unique_notifier.h |
@@ -0,0 +1,51 @@ |
+// Copyright 2014 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_BASE_DELAYED_UNIQUE_NOTIFIER_H_ |
+#define CC_BASE_DELAYED_UNIQUE_NOTIFIER_H_ |
+ |
+#include "base/callback.h" |
+#include "base/memory/weak_ptr.h" |
+#include "cc/base/cc_export.h" |
+ |
+namespace base { |
+class SequencedTaskRunner; |
+} // namespace base |
+ |
+namespace cc { |
+ |
+class CC_EXPORT DelayedUniqueNotifier { |
+ public: |
+ // Configure this notifier to issue the |closure| notification in |delay| time |
+ // from Schedule() call. |
+ DelayedUniqueNotifier(base::SequencedTaskRunner* task_runner, |
+ const base::Closure& closure, |
+ const base::TimeDelta& delay); |
+ |
+ // Destroying the notifier will ensure that no further notifications will |
+ // happen from this class. |
+ ~DelayedUniqueNotifier(); |
+ |
+ // Schedule a notification to be run. If another notification is already |
+ // pending, then it will happen in given delay from now. That is, if delay is |
+ // 16ms and a notification has been scheduled 10ms ago (ie, it should trigger |
+ // in 6ms), then calling schedule will ensure that the only notification that |
+ // arrives will happen in 16ms from now. |
+ void Schedule(); |
+ |
+ private: |
+ void NotifyIfTime(); |
+ |
+ base::SequencedTaskRunner* task_runner_; |
+ base::Closure closure_; |
+ base::TimeDelta delay_; |
+ base::TimeTicks next_notification_time_; |
+ bool notification_pending_; |
+ |
+ base::WeakPtrFactory<DelayedUniqueNotifier> weak_ptr_factory_; |
+}; |
+ |
+} // namespace cc |
+ |
+#endif // CC_BASE_DELAYED_UNIQUE_NOTIFIER_H_ |