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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef _nsDiskCacheDevice_h_
#define _nsDiskCacheDevice_h_
#include "mozilla/MemoryReporting.h"
#include "nsCacheDevice.h"
#include "nsDiskCacheBinding.h"
#include "nsDiskCacheBlockFile.h"
#include "nsDiskCacheEntry.h"
#include "nsIFile.h"
#include "nsIObserver.h"
#include "nsCOMArray.h"
class nsDiskCacheMap;
class nsDiskCacheDevice final : public nsCacheDevice {
public:
nsDiskCacheDevice();
virtual ~nsDiskCacheDevice();
virtual nsresult Init();
virtual nsresult Shutdown();
virtual const char * GetDeviceID(void);
virtual nsCacheEntry * FindEntry(nsCString * key, bool *collision);
virtual nsresult DeactivateEntry(nsCacheEntry * entry);
virtual nsresult BindEntry(nsCacheEntry * entry);
virtual void DoomEntry( nsCacheEntry * entry );
virtual nsresult OpenInputStreamForEntry(nsCacheEntry * entry,
nsCacheAccessMode mode,
uint32_t offset,
nsIInputStream ** result);
virtual nsresult OpenOutputStreamForEntry(nsCacheEntry * entry,
nsCacheAccessMode mode,
uint32_t offset,
nsIOutputStream ** result);
virtual nsresult GetFileForEntry(nsCacheEntry * entry,
nsIFile ** result);
virtual nsresult OnDataSizeChange(nsCacheEntry * entry, int32_t deltaSize);
virtual nsresult Visit(nsICacheVisitor * visitor);
virtual nsresult EvictEntries(const char * clientID);
bool EntryIsTooBig(int64_t entrySize);
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
/**
* Preference accessors
*/
void SetCacheParentDirectory(nsIFile * parentDir);
void SetCapacity(uint32_t capacity);
void SetMaxEntrySize(int32_t maxSizeInKilobytes);
/* private: */
void getCacheDirectory(nsIFile ** result);
uint32_t getCacheCapacity();
uint32_t getCacheSize();
uint32_t getEntryCount();
nsDiskCacheMap * CacheMap() { return &mCacheMap; }
private:
friend class nsDiskCacheDeviceDeactivateEntryEvent;
friend class nsEvictDiskCacheEntriesEvent;
friend class nsDiskCacheMap;
/**
* Private methods
*/
inline bool IsValidBinding(nsDiskCacheBinding *binding)
{
NS_ASSERTION(binding, " binding == nullptr");
NS_ASSERTION(binding->mDeactivateEvent == nullptr,
" entry in process of deactivation");
return (binding && !binding->mDeactivateEvent);
}
bool Initialized() { return mInitialized; }
nsresult Shutdown_Private(bool flush);
nsresult DeactivateEntry_Private(nsCacheEntry * entry,
nsDiskCacheBinding * binding);
nsresult OpenDiskCache();
nsresult ClearDiskCache();
nsresult EvictDiskCacheEntries(uint32_t targetCapacity);
/**
* Member variables
*/
nsCOMPtr<nsIFile> mCacheDirectory;
nsDiskCacheBindery mBindery;
uint32_t mCacheCapacity; // Unit is KiB's
int32_t mMaxEntrySize; // Unit is bytes internally
// XXX need soft/hard limits, currentTotal
nsDiskCacheMap mCacheMap;
bool mInitialized;
bool mClearingDiskCache;
};
#endif // _nsDiskCacheDevice_h_
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