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98 lines
3.9 KiB
C++
98 lines
3.9 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 nsCacheDevice.h, released
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* February 22, 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, 22-February-2001
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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 _nsCacheDevice_h_
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#define _nsCacheDevice_h_
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#include "nspr.h"
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#include "nsError.h"
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#include "nsICache.h"
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class nsIFile;
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class nsCString;
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class nsCacheEntry;
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class nsICacheVisitor;
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class nsIInputStream;
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class nsIOutputStream;
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/******************************************************************************
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* nsCacheDevice
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*******************************************************************************/
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class nsCacheDevice {
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public:
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nsCacheDevice() { MOZ_COUNT_CTOR(nsCacheDevice); }
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virtual ~nsCacheDevice() { MOZ_COUNT_DTOR(nsCacheDevice); }
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virtual nsresult Init() = 0;
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virtual nsresult Shutdown() = 0;
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virtual const char * GetDeviceID(void) = 0;
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virtual nsCacheEntry * FindEntry( nsCString * key, bool *collision ) = 0;
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virtual nsresult DeactivateEntry( nsCacheEntry * entry ) = 0;
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virtual nsresult BindEntry( nsCacheEntry * entry ) = 0;
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virtual void DoomEntry( nsCacheEntry * entry ) = 0;
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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) = 0;
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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) = 0;
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virtual nsresult GetFileForEntry( nsCacheEntry * entry,
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nsIFile ** result ) = 0;
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virtual nsresult OnDataSizeChange( nsCacheEntry * entry, PRInt32 deltaSize ) = 0;
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virtual nsresult Visit(nsICacheVisitor * visitor) = 0;
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/**
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* Device must evict entries associated with clientID. If clientID == nsnull, all
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* entries must be evicted. Active entries must be doomed, rather than evicted.
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*/
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virtual nsresult EvictEntries(const char * clientID) = 0;
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};
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#endif // _nsCacheDevice_h_
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