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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 _nsCacheDevice_h_
#define _nsCacheDevice_h_
#include "nspr.h"
#include "nsError.h"
#include "nsICache.h"
#include "nsStringFwd.h"
class nsIFile;
class nsCacheEntry;
class nsICacheVisitor;
class nsIInputStream;
class nsIOutputStream;
/******************************************************************************
* nsCacheDevice
*******************************************************************************/
class nsCacheDevice {
public:
MOZ_COUNTED_DEFAULT_CTOR(nsCacheDevice)
MOZ_COUNTED_DTOR_VIRTUAL(nsCacheDevice)
virtual nsresult Init() = 0;
virtual nsresult Shutdown() = 0;
virtual const char* GetDeviceID(void) = 0;
virtual nsCacheEntry* FindEntry(nsCString* key, bool* collision) = 0;
virtual nsresult DeactivateEntry(nsCacheEntry* entry) = 0;
virtual nsresult BindEntry(nsCacheEntry* entry) = 0;
virtual void DoomEntry(nsCacheEntry* entry) = 0;
virtual nsresult OpenInputStreamForEntry(nsCacheEntry* entry,
nsCacheAccessMode mode,
uint32_t offset,
nsIInputStream** result) = 0;
virtual nsresult OpenOutputStreamForEntry(nsCacheEntry* entry,
nsCacheAccessMode mode,
uint32_t offset,
nsIOutputStream** result) = 0;
virtual nsresult GetFileForEntry(nsCacheEntry* entry, nsIFile** result) = 0;
virtual nsresult OnDataSizeChange(nsCacheEntry* entry, int32_t deltaSize) = 0;
virtual nsresult Visit(nsICacheVisitor* visitor) = 0;
/**
* Device must evict entries associated with clientID. If clientID ==
* nullptr, all entries must be evicted. Active entries must be doomed,
* rather than evicted.
*/
virtual nsresult EvictEntries(const char* clientID) = 0;
};
#endif // _nsCacheDevice_h_
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