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Diffstat (limited to 'net/disk_cache/eviction.h')
-rw-r--r-- | net/disk_cache/eviction.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/net/disk_cache/eviction.h b/net/disk_cache/eviction.h new file mode 100644 index 0000000..dd4e467 --- /dev/null +++ b/net/disk_cache/eviction.h @@ -0,0 +1,57 @@ +// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef NET_DISK_CACHE_EVICTION_H_ +#define NET_DISK_CACHE_EVICTION_H_ + +#include "base/basictypes.h" +#include "base/compiler_specific.h" +#include "base/task.h" +#include "net/disk_cache/disk_format.h" +#include "net/disk_cache/rankings.h" + +namespace disk_cache { + +class BackendImpl; +class EntryImpl; + +// This class implements the eviction algorithm for the cache and it is tightly +// integrated with BackendImpl. +class Eviction { + public: + Eviction() : backend_(NULL), ALLOW_THIS_IN_INITIALIZER_LIST(factory_(this)) {} + ~Eviction() {} + + void Init(BackendImpl* backend); + + // Deletes entries from the cache until the current size is below the limit. + // If empty is true, the whole cache will be trimmed, regardless of being in + // use. + void TrimCache(bool empty); + + // Updates the ranking information for an entry. + void UpdateRank(EntryImpl* entry, bool modified); + + // Notifications of interesting events for a given entry. + void OnOpenEntry(EntryImpl* entry); + void OnCreateEntry(EntryImpl* entry); + void OnDoomEntry(EntryImpl* entry); + void OnDestroyEntry(EntryImpl* entry); + + private: + void ReportTrimTimes(EntryImpl* entry); + Rankings::List GetListForEntry(EntryImpl* entry); + + BackendImpl* backend_; + Rankings* rankings_; + IndexHeader* header_; + int max_size_; + ScopedRunnableMethodFactory<Eviction> factory_; + + DISALLOW_COPY_AND_ASSIGN(Eviction); +}; + +} // namespace disk_cache + +#endif // NET_DISK_CACHE_EVICTION_H_ |