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133 lines
4.8 KiB
C++
133 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is nsDiskCacheDevice.h, released
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* February 20, 2001.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Gordon Sheridan <gordon@netscape.com>
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* Patrick C. Beard <beard@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef _nsDiskCacheDevice_h_
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#define _nsDiskCacheDevice_h_
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#include "nsCacheDevice.h"
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#include "nsDiskCacheBinding.h"
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#include "nsDiskCacheBlockFile.h"
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#include "nsDiskCacheEntry.h"
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#include "nsILocalFile.h"
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#include "nsIObserver.h"
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#include "nsCOMArray.h"
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class nsDiskCacheMap;
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class nsDiskCacheDevice : public nsCacheDevice {
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public:
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nsDiskCacheDevice();
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virtual ~nsDiskCacheDevice();
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virtual nsresult Init();
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virtual nsresult Shutdown();
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virtual const char * GetDeviceID(void);
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virtual nsCacheEntry * FindEntry(nsCString * key, PRBool *collision);
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virtual nsresult DeactivateEntry(nsCacheEntry * entry);
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virtual nsresult BindEntry(nsCacheEntry * entry);
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virtual void DoomEntry( nsCacheEntry * entry );
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virtual nsresult OpenInputStreamForEntry(nsCacheEntry * entry,
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nsCacheAccessMode mode,
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PRUint32 offset,
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nsIInputStream ** result);
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virtual nsresult OpenOutputStreamForEntry(nsCacheEntry * entry,
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nsCacheAccessMode mode,
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PRUint32 offset,
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nsIOutputStream ** result);
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virtual nsresult GetFileForEntry(nsCacheEntry * entry,
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nsIFile ** result);
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virtual nsresult OnDataSizeChange(nsCacheEntry * entry, PRInt32 deltaSize);
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virtual nsresult Visit(nsICacheVisitor * visitor);
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virtual nsresult EvictEntries(const char * clientID);
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bool EntryIsTooBig(PRInt64 entrySize);
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/**
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* Preference accessors
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*/
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void SetCacheParentDirectory(nsILocalFile * parentDir);
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void SetCapacity(PRUint32 capacity);
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/* private: */
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void getCacheDirectory(nsILocalFile ** result);
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PRUint32 getCacheCapacity();
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PRUint32 getCacheSize();
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PRUint32 getEntryCount();
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nsDiskCacheMap * CacheMap() { return &mCacheMap; }
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private:
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/**
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* Private methods
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*/
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PRBool Initialized() { return mInitialized; }
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nsresult Shutdown_Private(PRBool flush);
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nsresult OpenDiskCache();
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nsresult ClearDiskCache();
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nsresult EvictDiskCacheEntries(PRUint32 targetCapacity);
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/**
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* Member variables
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*/
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nsCOMPtr<nsILocalFile> mCacheDirectory;
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nsDiskCacheBindery mBindery;
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PRUint32 mCacheCapacity; // Unit is KiB's
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// XXX need soft/hard limits, currentTotal
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nsDiskCacheMap mCacheMap;
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PRPackedBool mInitialized;
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};
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#endif // _nsDiskCacheDevice_h_
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