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Diffstat (limited to 'src/3rdparty/webkit/WebCore/history/PageCache.h')
-rw-r--r-- | src/3rdparty/webkit/WebCore/history/PageCache.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/history/PageCache.h b/src/3rdparty/webkit/WebCore/history/PageCache.h new file mode 100644 index 0000000..ad15ab6 --- /dev/null +++ b/src/3rdparty/webkit/WebCore/history/PageCache.h @@ -0,0 +1,83 @@ +/* + * Copyright (C) 2007 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 COMPUTER, 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 COMPUTER, 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. + */ + +#ifndef PageCache_h +#define PageCache_h + +#include "HistoryItem.h" +#include "Timer.h" +#include <wtf/Forward.h> +#include <wtf/HashSet.h> +#include <wtf/Noncopyable.h> + +namespace WebCore { + + class CachedPage; + class HistoryItem; + + class PageCache : Noncopyable { + public: + friend PageCache* pageCache(); + + void setCapacity(int); // number of pages to cache + int capacity() { return m_capacity; } + + void add(PassRefPtr<HistoryItem>, PassRefPtr<CachedPage>); // Prunes if capacity() is exceeded. + void remove(HistoryItem*); + CachedPage* get(HistoryItem* item) { return item ? item->m_cachedPage.get() : 0; } + + void releaseAutoreleasedPagesNow(); + + private: + typedef HashSet<RefPtr<CachedPage> > CachedPageSet; + + PageCache(); // Use pageCache() instead. + ~PageCache(); // Not implemented to make sure nobody accidentally calls delete -- WebCore does not delete singletons. + + void addToLRUList(HistoryItem*); // Adds to the head of the list. + void removeFromLRUList(HistoryItem*); + + void prune(); + + void autorelease(PassRefPtr<CachedPage>); + void releaseAutoreleasedPagesNowOrReschedule(Timer<PageCache>*); + + int m_capacity; + int m_size; + + // LRU List + HistoryItem* m_head; + HistoryItem* m_tail; + + Timer<PageCache> m_autoreleaseTimer; + CachedPageSet m_autoreleaseSet; + }; + + // Function to obtain the global page cache. + PageCache* pageCache(); + +} // namespace WebCore + +#endif // PageCache_h |