73 lines
2.2 KiB
C++
73 lines
2.2 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 _nsDiskCache_h_
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#define _nsDiskCache_h_
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#include "nsCacheEntry.h"
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#ifdef XP_WIN
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#include <winsock.h> // for htonl/ntohl
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#endif
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class nsDiskCache {
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public:
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enum {
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kCurrentVersion = 0x00010013 // format = 16 bits major version/16 bits minor version
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};
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enum { kData, kMetaData };
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// Stores the reason why the cache is corrupt.
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// Note: I'm only listing the enum values explicitly for easy mapping when
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// looking at telemetry data.
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enum CorruptCacheInfo {
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kNotCorrupt = 0,
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kInvalidArgPointer = 1,
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kUnexpectedError = 2,
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kOpenCacheMapError = 3,
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kBlockFilesShouldNotExist = 4,
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kOutOfMemory = 5,
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kCreateCacheSubdirectories = 6,
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kBlockFilesShouldExist = 7,
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kHeaderSizeNotRead = 8,
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kHeaderIsDirty = 9,
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kVersionMismatch = 10,
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kRecordsIncomplete = 11,
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kHeaderIncomplete = 12,
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kNotEnoughToRead = 13,
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kEntryCountIncorrect = 14,
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kCouldNotGetBlockFileForIndex = 15,
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kCouldNotCreateBlockFile = 16,
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kBlockFileSizeError = 17,
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kBlockFileBitMapWriteError = 18,
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kBlockFileSizeLessThanBitMap = 19,
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kBlockFileBitMapReadError = 20,
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kBlockFileEstimatedSizeError = 21,
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kFlushHeaderError = 22,
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kCacheCleanFilePathError = 23,
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kCacheCleanOpenFileError = 24,
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kCacheCleanTimerError = 25
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};
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// Parameter initval initializes internal state of hash function. Hash values are different
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// for the same text when different initval is used. It can be any random number.
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//
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// It can be used for generating 64-bit hash value:
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// (uint64_t(Hash(key, initval1)) << 32) | Hash(key, initval2)
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//
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// It can be also used to hash multiple strings:
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// h = Hash(string1, 0);
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// h = Hash(string2, h);
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// ...
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static PLDHashNumber Hash(const char* key, PLDHashNumber initval=0);
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static nsresult Truncate(PRFileDesc * fd, uint32_t newEOF);
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};
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#endif // _nsDiskCache_h_
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