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64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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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