#pragma once
#if USE(IOSURFACE)
#include "IOSurface.h"
#include "IntSize.h"
#include "IntSizeHash.h"
#include "Timer.h"
#include <wtf/Deque.h>
#include <wtf/HashMap.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
class IOSurfacePool {
WTF_MAKE_NONCOPYABLE(IOSurfacePool);
WTF_MAKE_FAST_ALLOCATED;
friend class NeverDestroyed<IOSurfacePool>;
public:
WEBCORE_EXPORT static IOSurfacePool& sharedPool();
std::unique_ptr<IOSurface> takeSurface(IntSize, CGColorSpaceRef, IOSurface::Format);
WEBCORE_EXPORT void addSurface(std::unique_ptr<IOSurface>);
void discardAllSurfaces();
WEBCORE_EXPORT void setPoolSize(size_t);
private:
IOSurfacePool();
struct CachedSurfaceDetails {
CachedSurfaceDetails()
: hasMarkedPurgeable(false)
{ }
void resetLastUseTime() { lastUseTime = MonotonicTime::now(); }
MonotonicTime lastUseTime;
bool hasMarkedPurgeable;
};
typedef Deque<std::unique_ptr<IOSurface>> CachedSurfaceQueue;
typedef HashMap<IntSize, CachedSurfaceQueue> CachedSurfaceMap;
typedef HashMap<IOSurface*, CachedSurfaceDetails> CachedSurfaceDetailsMap;
bool shouldCacheSurface(const IOSurface&) const;
void willAddSurface(IOSurface&, bool inUse);
void didRemoveSurface(IOSurface&, bool inUse);
void didUseSurfaceOfSize(IntSize);
void insertSurfaceIntoPool(std::unique_ptr<IOSurface>);
void evict(size_t additionalSize);
void tryEvictInUseSurface();
void tryEvictOldestCachedSurface();
void scheduleCollectionTimer();
void collectionTimerFired();
void collectInUseSurfaces();
bool markOlderSurfacesPurgeable();
void platformGarbageCollectNow();
void showPoolStatistics(const char*);
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)