25 |
25 |
26 #include "sf_memory_man.h" |
26 #include "sf_memory_man.h" |
27 #include "sf_memory_client.h" |
27 #include "sf_memory_client.h" |
28 #include "sl_cache.h" |
28 #include "sl_cache.h" |
29 #include <e32hashtab.h> |
29 #include <e32hashtab.h> |
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30 #include <f32dbg.h> |
30 |
31 |
31 //--------------------------------------------------------------------------------------------------------------------------------- |
32 //--------------------------------------------------------------------------------------------------------------------------------- |
32 class CDynamicDirCache; |
33 class CDynamicDirCache; |
33 |
34 |
34 |
35 |
130 void MakePageMRU(TInt64 aPos); |
131 void MakePageMRU(TInt64 aPos); |
131 TUint32 PageSizeInBytesLog2() const; |
132 TUint32 PageSizeInBytesLog2() const; |
132 |
133 |
133 TUint32 PageSizeInSegs() const; |
134 TUint32 PageSizeInSegs() const; |
134 |
135 |
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136 #if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
135 // Debugging functions |
137 // Debugging functions |
136 void Dump(); |
138 void Dump(); |
137 void Info() const; |
139 void Info(TDirCacheInfo* aInfo) const; |
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140 #endif //#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
138 |
141 |
139 protected: |
142 protected: |
140 CDynamicDirCache(TDriveInterface& aDrive, TUint32 aMinSizeInBytes, TUint32 aMaxSizeInBytes, TUint32 aPageSizeInBytesLog2, TUint32 aWrGranularityLog2); |
143 CDynamicDirCache(TDriveInterface& aDrive, TUint32 aMinSizeInBytes, TUint32 aMaxSizeInBytes, TUint32 aPageSizeInBytesLog2, TUint32 aWrGranularityLog2); |
141 void ConstructL(const TDesC& aClientName); |
144 void ConstructL(const TDesC& aClientName); |
142 |
145 |
143 void ReadDataFromSinglePageL(TInt64 aPos, TInt aLength, TDes8& aDes); |
146 void ReadDataFromSinglePageL(TInt64 aPos, TInt aLength, TDes8& aDes); |
144 TDynamicDirCachePage* WriteDataOntoSinglePageL(TInt64 aPos, const TUint8* aData, TUint32 aDataLen); |
147 TDynamicDirCachePage* WriteDataOntoSinglePageL(TInt64 aPos, const TUint8* aData, TUint32 aDataLen); |
145 |
148 |
146 TDynamicDirCachePage* FindPageByPos(TInt64 aPos); |
149 TDynamicDirCachePage* FindPageByPos(TInt64 aPos); |
147 TDynamicDirCachePage* UpdateActivePageL(TInt64 aPos); |
150 TDynamicDirCachePage* UpdateActivePageL(TInt64 aPos); |
148 TDynamicDirCachePage* AllocateAndLockNewPage(TInt64 aStartMedPos); |
151 TDynamicDirCachePage* AllocateAndLockNewPage(/*TInt64 aStartMedPos*/); |
149 TUint8* LockPage(TDynamicDirCachePage* aPage); |
152 TUint8* LockPage(TDynamicDirCachePage* aPage); |
150 TInt UnlockPage(TDynamicDirCachePage* aPage); |
153 TInt UnlockPage(TDynamicDirCachePage* aPage); |
151 TInt DecommitPage(TDynamicDirCachePage* aPage); |
154 TInt DecommitPage(TDynamicDirCachePage* aPage); |
152 inline TInt64 CalcPageStartPos(TInt64 aPos) const; |
155 inline TInt64 CalcPageStartPos(TInt64 aPos) const; |
153 void CheckThresholds(); |
156 void CheckThresholds(); |
157 TInt AddFirstOntoQueue(TDynamicDirCachePage* aPage, TDynamicDirCachePage::TPageType aType); |
160 TInt AddFirstOntoQueue(TDynamicDirCachePage* aPage, TDynamicDirCachePage::TPageType aType); |
158 TInt LookupTblRemove(TInt64 aPagePos); |
161 TInt LookupTblRemove(TInt64 aPagePos); |
159 TInt LookupTblAdd(TDynamicDirCachePage* aPage); |
162 TInt LookupTblAdd(TDynamicDirCachePage* aPage); |
160 TDynamicDirCachePage* LookupTblFind(TInt64 aPos); |
163 TDynamicDirCachePage* LookupTblFind(TInt64 aPos); |
161 TInt ResetPagePos(TDynamicDirCachePage* aPage); |
164 TInt ResetPagePos(TDynamicDirCachePage* aPage); |
162 void MakePageLastLocked(TDynamicDirCachePage* aPage); |
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163 void DoMakePageMRU(TInt64 aPos); |
165 void DoMakePageMRU(TInt64 aPos); |
164 void DoInvalidateCache(void); |
166 void DoInvalidateCache(void); |
165 |
167 |
166 private: |
168 private: |
167 TUint32 iPageSizeLog2; ///< Log2(cache page size or read granularity unit) |
169 TUint32 iPageSizeLog2; ///< Log2(cache page size or read granularity unit) |
175 TInt64 iCacheBasePos; ///< cache pages base position, used to align them at cluster size |
177 TInt64 iCacheBasePos; ///< cache pages base position, used to align them at cluster size |
176 |
178 |
177 TDriveInterface& iDrive; ///< reference to the driver for media access |
179 TDriveInterface& iDrive; ///< reference to the driver for media access |
178 TUint32 iCacheDisabled : 1; ///< if not 0 the cache is disabled totally and all reads and writes go via TDriveInterface directly |
180 TUint32 iCacheDisabled : 1; ///< if not 0 the cache is disabled totally and all reads and writes go via TDriveInterface directly |
179 |
181 |
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182 TDynamicDirCachePage* iLastVisitedPage; ///< a pointer to the last visited page, we always keep it locked |
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183 ///< to avoid excessive lock/unlock activities when we are scanning |
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184 ///< a page on the UnlockedQueue |
180 |
185 |
181 // data structures for LRU page list |
186 // data structures for LRU page list |
182 TCachePageList iLockedQ; ///< the locked queue that manages all locked pages, limited by minimum page number |
187 TCachePageList iLockedQ; ///< the locked queue that manages all locked pages, limited by minimum page number |
183 TCachePageList iUnlockedQ; ///< the unlocked queue that manages all locked pages, limited by maximum page number - minimum page number |
188 TCachePageList iUnlockedQ; ///< the unlocked queue that manages all locked pages, limited by maximum page number - minimum page number |
184 TUint32 iLockedQCount; |
189 TUint32 iLockedQCount; |