зеркало из https://github.com/mozilla/gecko-dev.git
95 строки
2.7 KiB
C++
95 строки
2.7 KiB
C++
/*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator.
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*
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* The Initial Developer of the Original Code is Intel Corp.
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* Portions created by Intel Corp. are
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* Copyright (C) 1999, 1999 Intel Corp. All
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* Rights Reserved.
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*
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* Contributor(s): Yixiong Zou <yixiong.zou@intel.com>
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* Carl Wong <carl.wong@intel.com>
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*/
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/*
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* This file is part of filecache implementation.
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*
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* nsIDBAccessor is a interface that shields all the direct database access
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* method from nsNetDiskCache.
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*
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* nsDBAccessor is a implementation of the nsIDBAccessor interface. It
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* uses dbm(Berkely) as the database.
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*
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*/
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#ifndef _NSIDBACCESSOR_H_
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#define _NSIDBACCESSOR_H_
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#include "nsIDBAccessor.h"
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#include "mcom_db.h"
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#include "prinrval.h"
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#include "nsCOMPtr.h"
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class nsIFile;
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// bogus string for the key of session id
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static const char * const SessionKey = "SK" ;
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// bogus string for the size
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static const char * const SizeEntry = "SE" ;
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// initial session id number
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static const PRInt16 ini_sessionID = 0xff ;
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static const PRUint16 SyncInterval = 1000 ;
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class nsDBAccessor : public nsIDBAccessor
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{
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public:
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NS_DECL_ISUPPORTS
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nsDBAccessor() ;
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virtual ~nsDBAccessor() ;
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NS_IMETHOD Init(nsIFile* dbfile) ;
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NS_IMETHOD Shutdown(void) ;
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NS_IMETHOD Put(PRInt32 aID, void* anEntry, PRUint32 aLength) ;
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NS_IMETHOD Get(PRInt32 aID, void** anEntry, PRUint32 *aLength) ;
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NS_IMETHOD Del(PRInt32 aID, void* anEntry, PRUint32 aLength) ;
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NS_IMETHOD GetID(const char* key, PRUint32 length, PRInt32* aID) ;
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NS_IMETHOD EnumEntry(void* *anEntry, PRUint32* aLength, PRBool bReset) ;
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NS_IMETHOD GetDBFilesize(PRUint64* aSize) ;
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NS_IMETHOD GetSizeEntry(void** anEntry, PRUint32 *aLength) ;
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NS_IMETHOD SetSizeEntry(void* anEntry, PRUint32 aLength) ;
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protected:
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nsresult Sync(void) ;
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private:
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DB * mDB ;
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nsCOMPtr<nsIFile> mDBFile ;
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PRInt16 mSessionID ;
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PRInt16 mSessionCntr ;
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PRIntervalTime mLastSyncTime ;
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PRInt64 mDBFilesize ; // cached DB filesize,
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// updated on every sync for now
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} ;
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#endif // _NSIDBACCESSOR_H_
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