| /* |
| * Copyright (C) 2014 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #import <WebCore/Timer.h> |
| #import <wtf/HashSet.h> |
| #import <wtf/Noncopyable.h> |
| |
| namespace WebKit { |
| |
| class RemoteLayerBackingStore; |
| class RemoteLayerTreeContext; |
| class RemoteLayerTreeTransaction; |
| |
| class RemoteLayerBackingStoreCollection { |
| WTF_MAKE_NONCOPYABLE(RemoteLayerBackingStoreCollection); |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| RemoteLayerBackingStoreCollection(); |
| |
| void backingStoreWasCreated(RemoteLayerBackingStore&); |
| void backingStoreWillBeDestroyed(RemoteLayerBackingStore&); |
| |
| // Return value indicates whether the backing store needs to be included in the transaction. |
| bool backingStoreWillBeDisplayed(RemoteLayerBackingStore&); |
| void backingStoreBecameUnreachable(RemoteLayerBackingStore&); |
| |
| void willFlushLayers(); |
| void willCommitLayerTree(RemoteLayerTreeTransaction&); |
| void didFlushLayers(); |
| |
| void volatilityTimerFired(); |
| bool markAllBackingStoreVolatileImmediatelyIfPossible(); |
| |
| void scheduleVolatilityTimer(); |
| |
| private: |
| enum VolatilityMarkingFlag { |
| MarkBuffersIgnoringReachability = 1 << 0 |
| }; |
| typedef unsigned VolatilityMarkingFlags; |
| bool markBackingStoreVolatileImmediately(RemoteLayerBackingStore&, VolatilityMarkingFlags = 0); |
| bool markBackingStoreVolatile(RemoteLayerBackingStore&, MonotonicTime now); |
| |
| HashSet<RemoteLayerBackingStore*> m_liveBackingStore; |
| HashSet<RemoteLayerBackingStore*> m_unparentedBackingStore; |
| |
| // Only used during a single flush. |
| HashSet<RemoteLayerBackingStore*> m_reachableBackingStoreInLatestFlush; |
| |
| WebCore::Timer m_volatilityTimer; |
| |
| bool m_inLayerFlush { false }; |
| }; |
| |
| } // namespace WebKit |