89 lines
2.9 KiB
Objective-C
89 lines
2.9 KiB
Objective-C
/*
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* Copyright (C) 2011 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if PLATFORM(IOS_FAMILY)
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#include "IntSize.h"
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#include "IntSizeHash.h"
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#include "Timer.h"
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#include <wtf/Deque.h>
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#include <wtf/Forward.h>
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#include <wtf/HashMap.h>
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#include <wtf/Lock.h>
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#include <wtf/RetainPtr.h>
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#include <wtf/Threading.h>
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#include <wtf/Vector.h>
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@class LegacyTileLayer;
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namespace WebCore {
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class LegacyTileLayerPool {
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WTF_MAKE_NONCOPYABLE(LegacyTileLayerPool);
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public:
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static LegacyTileLayerPool* sharedPool();
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void addLayer(const RetainPtr<LegacyTileLayer>&);
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RetainPtr<LegacyTileLayer> takeLayerWithSize(const IntSize&);
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// The maximum size of all queued layers in bytes.
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unsigned capacity() const { return m_capacity; }
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void setCapacity(unsigned);
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void drain();
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unsigned decayedCapacity() const;
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static unsigned bytesBackingLayerWithPixelSize(const IntSize&);
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private:
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LegacyTileLayerPool();
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typedef Deque<RetainPtr<LegacyTileLayer> > LayerList;
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bool canReuseLayerWithSize(const IntSize& size) const { return m_capacity && !size.isEmpty(); }
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void schedulePrune();
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void prune();
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typedef enum { LeaveUnchanged, MarkAsUsed } AccessType;
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LayerList& listOfLayersWithSize(const IntSize&, AccessType = LeaveUnchanged);
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HashMap<IntSize, LayerList> m_reuseLists;
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// Ordered by recent use. The last size is the most recently used.
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Vector<IntSize> m_sizesInPruneOrder;
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unsigned m_totalBytes;
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unsigned m_capacity;
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Lock m_layerPoolMutex;
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WallTime m_lastAddTime;
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bool m_needsPrune;
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friend NeverDestroyed<LegacyTileLayerPool>;
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};
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} // namespace WebCore
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#endif // PLATFORM(IOS_FAMILY)
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