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/*
* Copyright (C) 2013, 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
#ifndef IOSurfacePool_h
#define IOSurfacePool_h
#include "ColorSpace.h"
#include "IntSize.h"
#include "IntSizeHash.h"
#include "Timer.h"
#include <wtf/Deque.h>
#include <wtf/HashMap.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/RetainPtr.h>
#if USE(IOSURFACE)
namespace WebCore {
class IOSurface;
class IOSurfacePool {
WTF_MAKE_NONCOPYABLE(IOSurfacePool);
WTF_MAKE_FAST_ALLOCATED;
friend class NeverDestroyed<IOSurfacePool>;
public:
WEBCORE_EXPORT static IOSurfacePool& sharedPool();
PassRefPtr<IOSurface> takeSurface(IntSize size, ColorSpace colorSpace);
WEBCORE_EXPORT void addSurface(IOSurface*);
void discardAllSurfaces();
WEBCORE_EXPORT void setPoolSize(size_t);
void showPoolStatistics();
private:
IOSurfacePool();
struct CachedSurfaceDetails {
CachedSurfaceDetails()
: hasMarkedPurgeable(false)
{ }
void resetLastUseTime() { lastUseTime = std::chrono::steady_clock::now(); }
std::chrono::steady_clock::time_point lastUseTime;
bool hasMarkedPurgeable;
};
typedef Deque<RefPtr<IOSurface>> CachedSurfaceQueue;
typedef HashMap<IntSize, CachedSurfaceQueue> CachedSurfaceMap;
typedef HashMap<IOSurface*, CachedSurfaceDetails> CachedSurfaceDetailsMap;
void willAddSurface(IOSurface*, bool inUse);
void didRemoveSurface(IOSurface*, bool inUse);
void didUseSurfaceOfSize(IntSize);
void insertSurfaceIntoPool(IOSurface*);
void evict(size_t additionalSize);
void tryEvictInUseSurface();
void tryEvictOldestCachedSurface();
void scheduleCollectionTimer();
void collectionTimerFired();
void collectInUseSurfaces();
bool markOlderSurfacesPurgeable();
void platformGarbageCollectNow();
Timer m_collectionTimer;
CachedSurfaceMap m_cachedSurfaces;
CachedSurfaceQueue m_inUseSurfaces;
CachedSurfaceDetailsMap m_surfaceDetails;
Vector<IntSize> m_sizesInPruneOrder;
size_t m_bytesCached;
size_t m_inUseBytesCached;
size_t m_maximumBytesCached;
};
}
#endif // USE(IOSURFACE)
#endif // IOSurfacePool_h