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netwerk/cache2/CacheFileChunk.h@7e26c7da4463 (annotated)

netwerk/cache2/CacheFileChunk.h

Wed, 31 Dec 2014 06:55:50 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Wed, 31 Dec 2014 06:55:50 +0100
changeset 2
7e26c7da4463
permissions
-rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

michael@0 1 /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0 2 * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0 4
michael@0 5 #ifndef CacheFileChunk__h__
michael@0 6 #define CacheFileChunk__h__
michael@0 7
michael@0 8 #include "CacheFileIOManager.h"
michael@0 9 #include "CacheStorageService.h"
michael@0 10 #include "CacheHashUtils.h"
michael@0 11 #include "nsAutoPtr.h"
michael@0 12 #include "mozilla/Mutex.h"
michael@0 13
michael@0 14 namespace mozilla {
michael@0 15 namespace net {
michael@0 16
michael@0 17 #define kChunkSize (256 * 1024)
michael@0 18 #define kEmptyChunkHash 0x1826
michael@0 19
michael@0 20 class CacheFileChunk;
michael@0 21 class CacheFile;
michael@0 22 class ValidityPair;
michael@0 23
michael@0 24
michael@0 25 #define CACHEFILECHUNKLISTENER_IID \
michael@0 26 { /* baf16149-2ab5-499c-a9c2-5904eb95c288 */ \
michael@0 27 0xbaf16149, \
michael@0 28 0x2ab5, \
michael@0 29 0x499c, \
michael@0 30 {0xa9, 0xc2, 0x59, 0x04, 0xeb, 0x95, 0xc2, 0x88} \
michael@0 31 }
michael@0 32
michael@0 33 class CacheFileChunkListener : public nsISupports
michael@0 34 {
michael@0 35 public:
michael@0 36 NS_DECLARE_STATIC_IID_ACCESSOR(CACHEFILECHUNKLISTENER_IID)
michael@0 37
michael@0 38 NS_IMETHOD OnChunkRead(nsresult aResult, CacheFileChunk *aChunk) = 0;
michael@0 39 NS_IMETHOD OnChunkWritten(nsresult aResult, CacheFileChunk *aChunk) = 0;
michael@0 40 NS_IMETHOD OnChunkAvailable(nsresult aResult, uint32_t aChunkIdx,
michael@0 41 CacheFileChunk *aChunk) = 0;
michael@0 42 NS_IMETHOD OnChunkUpdated(CacheFileChunk *aChunk) = 0;
michael@0 43 };
michael@0 44
michael@0 45 NS_DEFINE_STATIC_IID_ACCESSOR(CacheFileChunkListener,
michael@0 46 CACHEFILECHUNKLISTENER_IID)
michael@0 47
michael@0 48
michael@0 49 class ChunkListenerItem {
michael@0 50 public:
michael@0 51 ChunkListenerItem() { MOZ_COUNT_CTOR(ChunkListenerItem); }
michael@0 52 ~ChunkListenerItem() { MOZ_COUNT_DTOR(ChunkListenerItem); }
michael@0 53
michael@0 54 nsCOMPtr<nsIEventTarget> mTarget;
michael@0 55 nsCOMPtr<CacheFileChunkListener> mCallback;
michael@0 56 };
michael@0 57
michael@0 58 class ChunkListeners {
michael@0 59 public:
michael@0 60 ChunkListeners() { MOZ_COUNT_CTOR(ChunkListeners); }
michael@0 61 ~ChunkListeners() { MOZ_COUNT_DTOR(ChunkListeners); }
michael@0 62
michael@0 63 nsTArray<ChunkListenerItem *> mItems;
michael@0 64 };
michael@0 65
michael@0 66 class CacheFileChunk : public CacheFileIOListener
michael@0 67 , public CacheMemoryConsumer
michael@0 68 {
michael@0 69 public:
michael@0 70 NS_DECL_THREADSAFE_ISUPPORTS
michael@0 71
michael@0 72 CacheFileChunk(CacheFile *aFile, uint32_t aIndex);
michael@0 73
michael@0 74 void InitNew(CacheFileChunkListener *aCallback);
michael@0 75 nsresult Read(CacheFileHandle *aHandle, uint32_t aLen,
michael@0 76 CacheHash::Hash16_t aHash,
michael@0 77 CacheFileChunkListener *aCallback);
michael@0 78 nsresult Write(CacheFileHandle *aHandle, CacheFileChunkListener *aCallback);
michael@0 79 void WaitForUpdate(CacheFileChunkListener *aCallback);
michael@0 80 nsresult CancelWait(CacheFileChunkListener *aCallback);
michael@0 81 nsresult NotifyUpdateListeners();
michael@0 82
michael@0 83 uint32_t Index();
michael@0 84 CacheHash::Hash16_t Hash();
michael@0 85 uint32_t DataSize();
michael@0 86 void UpdateDataSize(uint32_t aOffset, uint32_t aLen,
michael@0 87 bool aEOF);
michael@0 88
michael@0 89 NS_IMETHOD OnFileOpened(CacheFileHandle *aHandle, nsresult aResult);
michael@0 90 NS_IMETHOD OnDataWritten(CacheFileHandle *aHandle, const char *aBuf,
michael@0 91 nsresult aResult);
michael@0 92 NS_IMETHOD OnDataRead(CacheFileHandle *aHandle, char *aBuf, nsresult aResult);
michael@0 93 NS_IMETHOD OnFileDoomed(CacheFileHandle *aHandle, nsresult aResult);
michael@0 94 NS_IMETHOD OnEOFSet(CacheFileHandle *aHandle, nsresult aResult);
michael@0 95 NS_IMETHOD OnFileRenamed(CacheFileHandle *aHandle, nsresult aResult);
michael@0 96
michael@0 97 bool IsReady() const;
michael@0 98 bool IsDirty() const;
michael@0 99
michael@0 100 nsresult GetStatus();
michael@0 101 void SetError(nsresult aStatus);
michael@0 102
michael@0 103 char * BufForWriting() const;
michael@0 104 const char * BufForReading() const;
michael@0 105 void EnsureBufSize(uint32_t aBufSize);
michael@0 106 uint32_t MemorySize() const { return sizeof(CacheFileChunk) + mRWBufSize + mBufSize; }
michael@0 107
michael@0 108 // Memory reporting
michael@0 109 size_t SizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
michael@0 110 size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
michael@0 111
michael@0 112 private:
michael@0 113 friend class CacheFileInputStream;
michael@0 114 friend class CacheFileOutputStream;
michael@0 115 friend class CacheFile;
michael@0 116
michael@0 117 virtual ~CacheFileChunk();
michael@0 118
michael@0 119 enum EState {
michael@0 120 INITIAL = 0,
michael@0 121 READING = 1,
michael@0 122 WRITING = 2,
michael@0 123 READY = 3,
michael@0 124 ERROR = 4
michael@0 125 };
michael@0 126
michael@0 127 uint32_t mIndex;
michael@0 128 EState mState;
michael@0 129 nsresult mStatus;
michael@0 130 bool mIsDirty;
michael@0 131 bool mRemovingChunk;
michael@0 132 uint32_t mDataSize;
michael@0 133
michael@0 134 char *mBuf;
michael@0 135 uint32_t mBufSize;
michael@0 136
michael@0 137 char *mRWBuf;
michael@0 138 uint32_t mRWBufSize;
michael@0 139 CacheHash::Hash16_t mReadHash;
michael@0 140
michael@0 141 nsRefPtr<CacheFile> mFile; // is null if chunk is cached to
michael@0 142 // prevent reference cycles
michael@0 143 nsCOMPtr<CacheFileChunkListener> mListener;
michael@0 144 nsTArray<ChunkListenerItem *> mUpdateListeners;
michael@0 145 nsTArray<ValidityPair> mValidityMap;
michael@0 146 };
michael@0 147
michael@0 148
michael@0 149 } // net
michael@0 150 } // mozilla
michael@0 151
michael@0 152 #endif

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