13 // Description: |
13 // Description: |
14 // f32\sfat\sl_dir_cache.cpp |
14 // f32\sfat\sl_dir_cache.cpp |
15 // |
15 // |
16 // |
16 // |
17 |
17 |
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18 //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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19 //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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20 //!! |
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21 //!! WARNING!! DO NOT edit this file !! '\sfat' component is obsolete and is not being used. '\sfat32'replaces it |
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22 //!! |
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23 //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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24 //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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25 |
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26 |
18 #include "sl_std.h" |
27 #include "sl_std.h" |
19 #include "sl_dir_cache.h" |
28 #include "sl_dir_cache.h" |
20 |
29 |
21 //====================================================================== |
30 //====================================================================== |
22 TDynamicDirCachePage::~TDynamicDirCachePage() |
31 TDynamicDirCachePage::~TDynamicDirCachePage() |
23 { |
32 { |
24 } |
33 } |
25 |
34 |
26 /** |
35 /** |
27 The static cache page creation function. |
36 The static cache page creation function. |
28 Cache page objects are not supposed to be created on the stack, so this factory function is required. |
37 Cache page objects are not supposed to be created on the stack, so this factory function is required. |
29 */ |
38 */ |
30 TDynamicDirCachePage* TDynamicDirCachePage::NewL(CDynamicDirCache* aOwnerCache, TInt64 aStartMedPos, TUint8* aStartRamAddr) |
39 TDynamicDirCachePage* TDynamicDirCachePage::NewL(CDynamicDirCache* aOwnerCache, TInt64 aStartMedPos, TUint8* aStartRamAddr) |
31 { |
40 { |
32 return new(ELeave) TDynamicDirCachePage(aOwnerCache, aStartMedPos, aStartRamAddr); |
41 return new(ELeave) TDynamicDirCachePage(aOwnerCache, aStartMedPos, aStartRamAddr); |
33 } |
42 } |
34 |
43 |
35 /** |
44 /** |
36 Cache page constructor. |
45 Cache page constructor. |
37 @param aOwnerCache pointer of the cache that owns this page |
46 @param aOwnerCache pointer of the cache that owns this page |
38 @param aStartMedPos the start address on the media that this page caches |
47 @param aStartMedPos the start address on the media that this page caches |
39 @param aStartRamAddr the start address in the ram that this page content lives |
48 @param aStartRamAddr the start address in the ram that this page content lives |
40 */ |
49 */ |
41 TDynamicDirCachePage::TDynamicDirCachePage(CDynamicDirCache* aOwnerCache, TInt64 aStartMedPos, TUint8* aStartRamAddr) |
50 TDynamicDirCachePage::TDynamicDirCachePage(CDynamicDirCache* aOwnerCache, TInt64 aStartMedPos, TUint8* aStartRamAddr) |
42 :iStartMedPos(aStartMedPos), |
51 :iStartMedPos(aStartMedPos), |
43 iStartRamAddr(aStartRamAddr), |
52 iStartRamAddr(aStartRamAddr), |
44 iOwnerCache(aOwnerCache), |
53 iOwnerCache(aOwnerCache), |
45 iValid(EFalse), |
54 iValid(EFalse), |
46 iLocked(EFalse) |
55 iLocked(EFalse) |
47 { |
56 { |
48 // __PRINT3(_L("TDynamicDirCachePage::TDynamicDirCachePage(aStartMedPos=%lx, aStartRamAddr=0x%X, aPageSize=%u)"), aStartMedPos, aStartRamAddr, PageSizeInBytes()); |
57 // __PRINT3(_L("TDynamicDirCachePage::TDynamicDirCachePage(aStartMedPos=%lx, aStartRamAddr=0x%X, aPageSize=%u)"), aStartMedPos, aStartRamAddr, PageSizeInBytes()); |
49 iType = EUnknown; |
58 iType = EUnknown; |
50 } |
59 } |
51 |
60 |
52 /////////////////////////////// class CDynamicDirCache::TLookupEntry /////////////////////////// |
61 /////////////////////////////// class CDynamicDirCache::TLookupEntry /////////////////////////// |
53 /** |
62 /** |
54 Required by RHashSet<TLookupEntry> to identify individual hash set entries. |
63 Required by RHashSet<TLookupEntry> to identify individual hash set entries. |
55 @see RHashSet |
64 @see RHashSet |
56 */ |
65 */ |
57 TBool IdentityFunction(const TLookupEntry& aEntry1, const TLookupEntry& aEntry2) |
66 TBool IdentityFunction(const TLookupEntry& aEntry1, const TLookupEntry& aEntry2) |
58 { |
67 { |
59 // only check starting med pos for hash searching |
68 // only check starting med pos for hash searching |
60 return aEntry1.iPos == aEntry2.iPos; |
69 return aEntry1.iPos == aEntry2.iPos; |
61 } |
70 } |
62 /** |
71 /** |
63 Required by RHashSet<TLookupEntry> to generate hash value. |
72 Required by RHashSet<TLookupEntry> to generate hash value. |
64 @see RHashSet |
73 @see RHashSet |
65 */ |
74 */ |
66 TUint32 HashFunction(const TLookupEntry& aEntry) |
75 TUint32 HashFunction(const TLookupEntry& aEntry) |
67 { |
76 { |
68 return (DefaultHash::Integer(I64HIGH(aEntry.iPos)) + DefaultHash::Integer(I64LOW(aEntry.iPos))); |
77 return (DefaultHash::Integer(I64HIGH(aEntry.iPos)) + DefaultHash::Integer(I64LOW(aEntry.iPos))); |
69 } |
78 } |
70 |
79 |
71 /////////////////////////////// class CDynamicDirCache /////////////////////////// |
80 /////////////////////////////// class CDynamicDirCache /////////////////////////// |
72 CDynamicDirCache::~CDynamicDirCache() |
81 CDynamicDirCache::~CDynamicDirCache() |
73 { |
82 { |
74 // __PRINT(_L("CDynamicDirCache::~CDynamicDirCache()")); |
83 // __PRINT(_L("CDynamicDirCache::~CDynamicDirCache()")); |
75 |
84 |
76 // we should never decommit locked pages |
85 // we should never decommit locked pages |
77 while (!iLockedQ.IsEmpty()) |
86 while (!iLockedQ.IsEmpty()) |
78 { |
87 { |
79 TDynamicDirCachePage* page = iLockedQ.Last(); |
88 TDynamicDirCachePage* page = iLockedQ.Last(); |
80 DeQueue(page); // remove from queue |
89 DeQueue(page); // remove from queue |
81 LookupTblRemove(page->StartPos()); // remove from lookuptable |
90 LookupTblRemove(page->StartPos()); // remove from lookuptable |
82 delete page; |
91 delete page; |
83 } |
92 } |
84 ASSERT(iLockedQCount == 0); |
93 ASSERT(iLockedQCount == 0); |
85 |
94 |
86 while (!iUnlockedQ.IsEmpty()) |
95 while (!iUnlockedQ.IsEmpty()) |
87 { |
96 { |
88 TDynamicDirCachePage* page = iUnlockedQ.Last(); |
97 TDynamicDirCachePage* page = iUnlockedQ.Last(); |
89 DeQueue(page); // remove from queue |
98 DeQueue(page); // remove from queue |
90 LookupTblRemove(page->StartPos()); // remove from lookuptable |
99 LookupTblRemove(page->StartPos()); // remove from lookuptable |
91 DecommitPage(page); // inform cache client to decommit page memory |
100 DecommitPage(page); // inform cache client to decommit page memory |
92 delete page; |
101 delete page; |
93 } |
102 } |
94 ASSERT(iUnlockedQCount == 0); |
103 ASSERT(iUnlockedQCount == 0); |
95 |
104 |
96 delete iActivePage; |
105 delete iActivePage; |
97 |
106 |
98 ASSERT(iLookupTable.Count() == 0); |
107 ASSERT(iLookupTable.Count() == 0); |
99 iLookupTable.Close(); |
108 iLookupTable.Close(); |
100 if (iCacheMemoryClient) |
109 if (iCacheMemoryClient) |
101 iCacheMemoryClient->Reset(); |
110 iCacheMemoryClient->Reset(); |
102 } |
111 } |
103 |
112 |
104 /** |
113 /** |
105 Constructor of CDynamicDirCache. |
114 Constructor of CDynamicDirCache. |
106 @param aDrive local drive interface to read/write media |
115 @param aDrive local drive interface to read/write media |
107 @param aMinPageNum the minimum page number for the cache, includes iActive page and locked pages. |
116 @param aMinPageNum the minimum page number for the cache, includes iActive page and locked pages. |
108 @param aMaxPageNum the maximum page number for the cache, includes iActive page, locked pages and unlocked pages. |
117 @param aMaxPageNum the maximum page number for the cache, includes iActive page, locked pages and unlocked pages. |
109 @param aPageSizeInBytesLog2 the log2 value of page size in bytes, assumes page size is always a power of two |
118 @param aPageSizeInBytesLog2 the log2 value of page size in bytes, assumes page size is always a power of two |
110 */ |
119 */ |
111 CDynamicDirCache::CDynamicDirCache(TFatDriveInterface& aDrive, TUint32 aMinPageNum, TUint32 aMaxPageNum, TUint32 aPageSizeInBytesLog2) |
120 CDynamicDirCache::CDynamicDirCache(TFatDriveInterface& aDrive, TUint32 aMinPageNum, TUint32 aMaxPageNum, TUint32 aPageSizeInBytesLog2) |
112 :iPageSizeLog2(aPageSizeInBytesLog2), |
121 :iPageSizeLog2(aPageSizeInBytesLog2), |
113 iMinSizeInPages(aMinPageNum), |
122 iMinSizeInPages(aMinPageNum), |
114 iMaxSizeInPages(aMaxPageNum), |
123 iMaxSizeInPages(aMaxPageNum), |
181 /** |
190 /** |
182 Insert an unlocked page into the last position of the locked queue, may squeeze the original last page into |
191 Insert an unlocked page into the last position of the locked queue, may squeeze the original last page into |
183 the unlocked queue. |
192 the unlocked queue. |
184 This function is used on last visited but 'unlocked' pages to avoid excessive lock/unlock calls to cache memory |
193 This function is used on last visited but 'unlocked' pages to avoid excessive lock/unlock calls to cache memory |
185 manager as contiguous entry reading/writing often happens on the same page. |
194 manager as contiguous entry reading/writing often happens on the same page. |
186 @param aPage the page to be inserted. |
195 @param aPage the page to be inserted. |
187 @pre the page type of aPage should only be TDynamicDirCachePage::EUnknown |
196 @pre the page type of aPage should only be TDynamicDirCachePage::EUnknown |
188 */ |
197 */ |
189 void CDynamicDirCache::MakePageLastLocked(TDynamicDirCachePage* aPage) |
198 void CDynamicDirCache::MakePageLastLocked(TDynamicDirCachePage* aPage) |
190 { |
199 { |
191 // this function should not be called on active pages |
200 // this function should not be called on active pages |
192 ASSERT(aPage->iType == TDynamicDirCachePage::EUnknown); |
201 ASSERT(aPage->iType == TDynamicDirCachePage::EUnknown); |
193 |
202 |
194 if (iLockedQ.IsEmpty()) |
203 if (iLockedQ.IsEmpty()) |
195 { |
204 { |
196 // if locked queue is empty, add it onto the locked queue directly |
205 // if locked queue is empty, add it onto the locked queue directly |
197 AddFirstOntoQueue(aPage, TDynamicDirCachePage::ELocked); |
206 AddFirstOntoQueue(aPage, TDynamicDirCachePage::ELocked); |
198 } |
207 } |
199 else |
208 else |
200 { |
209 { |
201 // otherwise, we squeeze for the last position on locked queue |
210 // otherwise, we squeeze for the last position on locked queue |
202 while (iLockedQCount + 1 >= iMinSizeInPages) |
211 while (iLockedQCount + 1 >= iMinSizeInPages) |
203 { |
212 { |
204 TDynamicDirCachePage* last = iLockedQ.Last(); |
213 TDynamicDirCachePage* last = iLockedQ.Last(); |
205 DeQueue(last); |
214 DeQueue(last); |
206 UnlockPage(last); |
215 UnlockPage(last); |
207 AddFirstOntoQueue(last, TDynamicDirCachePage::EUnlocked); |
216 AddFirstOntoQueue(last, TDynamicDirCachePage::EUnlocked); |
208 } |
217 } |
209 |
218 |
210 // iLockedQCount + 1 < iMinSizeInPages |
219 // iLockedQCount + 1 < iMinSizeInPages |
211 iLockedQ.AddLast(*aPage); |
220 iLockedQ.AddLast(*aPage); |
212 aPage->SetPageType(TDynamicDirCachePage::ELocked); |
221 aPage->SetPageType(TDynamicDirCachePage::ELocked); |
213 iLockedQCount++; |
222 iLockedQCount++; |
214 } |
223 } |
215 } |
224 } |
216 |
225 |
217 /** |
226 /** |
218 Read data from a single page. If the page is not found or not valid anymore, read media onto iActive page |
227 Read data from a single page. If the page is not found or not valid anymore, read media onto iActive page |
219 first. |
228 first. |
220 @param aPos the starting position of the media address to be read. |
229 @param aPos the starting position of the media address to be read. |
221 @param aLength the length of the content to be read. |
230 @param aLength the length of the content to be read. |
222 @param aDes the descriptor to contain the content. |
231 @param aDes the descriptor to contain the content. |
223 @pre aLength should be no more than page size. |
232 @pre aLength should be no more than page size. |
224 */ |
233 */ |
225 void CDynamicDirCache::ReadDataFromSinglePageL(TInt64 aPos, TInt aLength, TDes8& aDes) |
234 void CDynamicDirCache::ReadDataFromSinglePageL(TInt64 aPos, TInt aLength, TDes8& aDes) |
226 { |
235 { |
227 //-- the data section is in the cache page entirely, take data directly from the cache |
236 //-- the data section is in the cache page entirely, take data directly from the cache |
228 TDynamicDirCachePage* pPage = FindPageByPos(aPos); |
237 TDynamicDirCachePage* pPage = FindPageByPos(aPos); |
229 if (pPage) |
238 if (pPage) |
230 { |
239 { |
231 // lock page before reading, |
240 // lock page before reading, |
232 if (LockPage(pPage) != NULL) |
241 if (LockPage(pPage) != NULL) |
233 { |
242 { |
234 // read data |
243 // read data |
235 aDes.Copy(pPage->PtrInPage(aPos), aLength); |
244 aDes.Copy(pPage->PtrInPage(aPos), aLength); |
236 |
245 |
237 // if page is from unlocked queue, insert it onto the last page of the locked |
246 // if page is from unlocked queue, insert it onto the last page of the locked |
238 // queue. this is to avoid excessive locking and unlocking operations that is |
247 // queue. this is to avoid excessive locking and unlocking operations that is |
239 // highly likely to happen for following reads. |
248 // highly likely to happen for following reads. |
240 if (pPage->PageType() == TDynamicDirCachePage::EUnlocked) |
249 if (pPage->PageType() == TDynamicDirCachePage::EUnlocked) |
241 { |
250 { |
242 DeQueue(pPage); |
251 DeQueue(pPage); |
243 MakePageLastLocked(pPage); |
252 MakePageLastLocked(pPage); |
244 } |
253 } |
245 } |
254 } |
246 else // page locking failed |
255 else // page locking failed |
247 { |
256 { |
248 ASSERT(pPage->PageType() == TDynamicDirCachePage::EUnlocked); |
257 ASSERT(pPage->PageType() == TDynamicDirCachePage::EUnlocked); |
249 DeQueue(pPage); |
258 DeQueue(pPage); |
250 LookupTblRemove(pPage->StartPos()); |
259 LookupTblRemove(pPage->StartPos()); |
251 DecommitPage(pPage); |
260 DecommitPage(pPage); |
252 delete pPage; |
261 delete pPage; |
253 pPage = NULL; |
262 pPage = NULL; |
254 } |
263 } |
255 } |
264 } |
256 |
265 |
257 if (!pPage) |
266 if (!pPage) |
258 { |
267 { |
259 // if page not found or page data not valid anymore, use active page to read data in |
268 // if page not found or page data not valid anymore, use active page to read data in |
260 pPage = UpdateActivePageL(aPos); |
269 pPage = UpdateActivePageL(aPos); |
261 // read data |
270 // read data |
262 aDes.Copy(pPage->PtrInPage(aPos), aLength); |
271 aDes.Copy(pPage->PtrInPage(aPos), aLength); |
263 } |
272 } |
264 |
273 |
265 } |
274 } |
266 |
275 |
267 //==================================================================== |
276 //==================================================================== |
268 /** |
277 /** |
269 Implementation of pure virtual function. |
278 Implementation of pure virtual function. |
270 @see MWTCacheInterface::ReadL() |
279 @see MWTCacheInterface::ReadL() |
271 */ |
280 */ |
272 void CDynamicDirCache::ReadL(TInt64 aPos, TInt aLength, TDes8& aDes) |
281 void CDynamicDirCache::ReadL(TInt64 aPos, TInt aLength, TDes8& aDes) |
273 { |
282 { |
274 #ifdef _DEBUG |
283 #ifdef _DEBUG |
275 if(iCacheDisabled) |
284 if(iCacheDisabled) |
276 { |
285 { |
277 // cache is disabled for debug purposes |
286 // cache is disabled for debug purposes |
278 __PRINT(_L("CDynamicDirCache disabled")); |
287 __PRINT(_L("CDynamicDirCache disabled")); |
307 |
316 |
308 TPtr8 dataNext = aDes.MidTPtr(aDes.Length()); |
317 TPtr8 dataNext = aDes.MidTPtr(aDes.Length()); |
309 |
318 |
310 //-- 2. read whole pages of data |
319 //-- 2. read whole pages of data |
311 while (dataLen >= PageSz) |
320 while (dataLen >= PageSz) |
312 { |
321 { |
313 //-- find out if currMediaPos is in cache. If not, find a spare page and read data there |
322 //-- find out if currMediaPos is in cache. If not, find a spare page and read data there |
314 ReadDataFromSinglePageL(currMediaPos, PageSz, dataNext); |
323 ReadDataFromSinglePageL(currMediaPos, PageSz, dataNext); |
315 currMediaPos += PageSz; |
324 currMediaPos += PageSz; |
316 dataLen -= PageSz; |
325 dataLen -= PageSz; |
317 dataNext = dataNext.MidTPtr(dataNext.Length()); |
326 dataNext = dataNext.MidTPtr(dataNext.Length()); |
318 } |
327 } |
319 |
328 |
320 //-- 3. read the rest of the data |
329 //-- 3. read the rest of the data |
321 if(dataLen > 0) |
330 if(dataLen > 0) |
322 { |
331 { |
323 ReadDataFromSinglePageL(currMediaPos, dataLen, dataNext); |
332 ReadDataFromSinglePageL(currMediaPos, dataLen, dataNext); |
324 } |
333 } |
325 } //else((TUint32)aLength <= bytesToPageEnd) |
334 } //else((TUint32)aLength <= bytesToPageEnd) |
326 } |
335 } |
327 |
336 |
328 /** |
337 /** |
329 Write data through a single page. If the page is not found or not valid anymore, read media onto iActive page |
338 Write data through a single page. If the page is not found or not valid anymore, read media onto iActive page |
330 first, then write data through iActive page. |
339 first, then write data through iActive page. |
331 @param aPos the starting position of the media address to be write. |
340 @param aPos the starting position of the media address to be write. |
332 @param aData the starting address that the writing content lives in the ram. |
341 @param aData the starting address that the writing content lives in the ram. |
333 @param aDataLen the length of the content to be written. |
342 @param aDataLen the length of the content to be written. |
334 @pre aDataLen should be no more than page size. |
343 @pre aDataLen should be no more than page size. |
335 */ |
344 */ |
336 void CDynamicDirCache::WriteDataOntoSinglePageL(TInt64 aPos, const TUint8* aData, TUint32 aDataLen) |
345 void CDynamicDirCache::WriteDataOntoSinglePageL(TInt64 aPos, const TUint8* aData, TUint32 aDataLen) |
337 { |
346 { |
338 ASSERT(aDataLen <= iPageSizeInBytes); |
347 ASSERT(aDataLen <= iPageSizeInBytes); |
339 //-- the data section is in the cache page entirely, take data directly from the cache |
348 //-- the data section is in the cache page entirely, take data directly from the cache |
340 TDynamicDirCachePage* pPage = FindPageByPos(aPos); |
349 TDynamicDirCachePage* pPage = FindPageByPos(aPos); |
341 if (pPage) |
350 if (pPage) |
342 { |
351 { |
343 // lock page before writing, |
352 // lock page before writing, |
344 if (LockPage(pPage) != NULL) |
353 if (LockPage(pPage) != NULL) |
345 { |
354 { |
346 //-- update cache |
355 //-- update cache |
347 Mem::Copy(pPage->PtrInPage(aPos), aData, aDataLen); |
356 Mem::Copy(pPage->PtrInPage(aPos), aData, aDataLen); |
348 } |
357 } |
349 else |
358 else |
350 { |
359 { |
351 ASSERT(pPage->PageType() == TDynamicDirCachePage::EUnlocked); |
360 ASSERT(pPage->PageType() == TDynamicDirCachePage::EUnlocked); |
352 DeQueue(pPage); |
361 DeQueue(pPage); |
353 LookupTblRemove(pPage->StartPos()); |
362 LookupTblRemove(pPage->StartPos()); |
354 DecommitPage(pPage); |
363 DecommitPage(pPage); |
355 delete pPage; |
364 delete pPage; |
356 pPage = NULL; |
365 pPage = NULL; |
357 } |
366 } |
358 } |
367 } |
359 |
368 |
360 // if page not found or page data not valid anymore, use active page to read data in |
369 // if page not found or page data not valid anymore, use active page to read data in |
361 if (!pPage) |
370 if (!pPage) |
362 { |
371 { |
363 pPage = UpdateActivePageL(aPos); |
372 pPage = UpdateActivePageL(aPos); |
364 //-- update cache |
373 //-- update cache |
365 Mem::Copy(pPage->PtrInPage(aPos), aData, aDataLen); |
374 Mem::Copy(pPage->PtrInPage(aPos), aData, aDataLen); |
366 } |
375 } |
367 |
376 |
368 // make sure the page is unlocked after use |
377 // make sure the page is unlocked after use |
369 if (pPage->PageType() == TDynamicDirCachePage::EUnlocked) |
378 if (pPage->PageType() == TDynamicDirCachePage::EUnlocked) |
370 { |
379 { |
371 UnlockPage(pPage); |
380 UnlockPage(pPage); |
372 } |
381 } |
373 |
382 |
374 // always make writting events MRU |
383 // always make writting events MRU |
375 MakePageMRU(aPos); |
384 MakePageMRU(aPos); |
376 return; |
385 return; |
377 } |
386 } |
378 |
387 |
379 /** |
388 /** |
380 Implementation of pure virtual function. |
389 Implementation of pure virtual function. |
381 @see MWTCacheInterface::WriteL() |
390 @see MWTCacheInterface::WriteL() |
382 */ |
391 */ |
383 void CDynamicDirCache::WriteL(TInt64 aPos,const TDesC8& aDes) |
392 void CDynamicDirCache::WriteL(TInt64 aPos,const TDesC8& aDes) |
384 { |
393 { |
385 #ifdef _DEBUG |
394 #ifdef _DEBUG |
386 if(iCacheDisabled) |
395 if(iCacheDisabled) |
387 { |
396 { |
388 // cache is disabled for debug purposes |
397 // cache is disabled for debug purposes |
389 __PRINT(_L("CDynamicDirCache disabled")); |
398 __PRINT(_L("CDynamicDirCache disabled")); |
442 if(nErr != KErrNone) |
451 if(nErr != KErrNone) |
443 {//-- some serious problem occured during writing, invalidate cache. |
452 {//-- some serious problem occured during writing, invalidate cache. |
444 InvalidateCache(); |
453 InvalidateCache(); |
445 User::Leave(nErr); |
454 User::Leave(nErr); |
446 } |
455 } |
447 } |
456 } |
448 |
457 |
449 /** |
458 /** |
450 Implementation of pure virtual function. |
459 Implementation of pure virtual function. |
451 @see MWTCacheInterface::InvalidateCache() |
460 @see MWTCacheInterface::InvalidateCache() |
452 */ |
461 */ |
453 void CDynamicDirCache::InvalidateCache(void) |
462 void CDynamicDirCache::InvalidateCache(void) |
454 { |
463 { |
455 __PRINT2(_L("CDynamicDirCache::InvalidateCache(locked=%d, unlocked=%d)"), iLockedQCount, iUnlockedQCount); |
464 __PRINT2(_L("CDynamicDirCache::InvalidateCache(locked=%d, unlocked=%d)"), iLockedQCount, iUnlockedQCount); |
456 // we should never decommit locked pages as they needs to be reserved anyway |
465 // we should never decommit locked pages as they needs to be reserved anyway |
457 // the overhead of unnecessary page committing operations |
466 // the overhead of unnecessary page committing operations |
458 while(!iLockedQ.IsEmpty()) |
467 while(!iLockedQ.IsEmpty()) |
459 { |
468 { |
460 TDynamicDirCachePage* page = iLockedQ.Last(); |
469 TDynamicDirCachePage* page = iLockedQ.Last(); |
461 DeQueue(page); // remove from queue |
470 DeQueue(page); // remove from queue |
462 LookupTblRemove(page->StartPos()); // remove from lookuptable |
471 LookupTblRemove(page->StartPos()); // remove from lookuptable |
463 delete page; |
472 delete page; |
464 } |
473 } |
465 ASSERT(iLockedQCount == 0); |
474 ASSERT(iLockedQCount == 0); |
466 |
475 |
467 // however we should decommit unlocked pages here |
476 // however we should decommit unlocked pages here |
468 while (!iUnlockedQ.IsEmpty()) |
477 while (!iUnlockedQ.IsEmpty()) |
469 { |
478 { |
470 TDynamicDirCachePage* page = iUnlockedQ.Last(); |
479 TDynamicDirCachePage* page = iUnlockedQ.Last(); |
471 DeQueue(page); // remove from queue |
480 DeQueue(page); // remove from queue |
472 LookupTblRemove(page->StartPos()); // remove from lookuptable |
481 LookupTblRemove(page->StartPos()); // remove from lookuptable |
473 DecommitPage(page); // inform cache client to decommit page memory |
482 DecommitPage(page); // inform cache client to decommit page memory |
474 delete page; |
483 delete page; |
475 } |
484 } |
476 ASSERT(iUnlockedQCount == 0); |
485 ASSERT(iUnlockedQCount == 0); |
477 |
486 |
478 ASSERT(iLookupTable.Count() == 0); |
487 ASSERT(iLookupTable.Count() == 0); |
479 iLookupTable.Close(); |
488 iLookupTable.Close(); |
480 |
489 |
481 ASSERT(iCacheMemoryClient); |
490 ASSERT(iCacheMemoryClient); |
482 |
491 |
483 // initialize cache state. |
492 // initialize cache state. |
484 // Note that once the client is reset, all pages lose connection with the client |
493 // Note that once the client is reset, all pages lose connection with the client |
485 // including the active page. So we will need to reset and re-allocate active page |
494 // including the active page. So we will need to reset and re-allocate active page |
486 // properly. |
495 // properly. |
487 if (iCacheMemoryClient) |
496 if (iCacheMemoryClient) |
488 iCacheMemoryClient->Reset(); |
497 iCacheMemoryClient->Reset(); |
489 |
498 |
490 // reset and re-allocate active page |
499 // reset and re-allocate active page |
491 ResetPagePos(iActivePage); // reset start media position (0), invalidate page content |
500 ResetPagePos(iActivePage); // reset start media position (0), invalidate page content |
492 TUint8* startRamAddr = iCacheMemoryClient->AllocateAndLockSegments(PageSizeInSegs()); |
501 TUint8* startRamAddr = iCacheMemoryClient->AllocateAndLockSegments(PageSizeInSegs()); |
493 // this should always succeed as the client has just been reset and there are always reserved pages |
502 // this should always succeed as the client has just been reset and there are always reserved pages |
494 ASSERT(startRamAddr); |
503 ASSERT(startRamAddr); |
495 iActivePage->SetStartPtr(startRamAddr); // set RAM address |
504 iActivePage->SetStartPtr(startRamAddr); // set RAM address |
496 } |
505 } |
497 |
506 |
498 |
507 |
499 /** this method isn't implemented*/ |
508 /** this method isn't implemented*/ |
500 void CDynamicDirCache::InvalidateCachePage(TUint64 /*aPos*/) |
509 void CDynamicDirCache::InvalidateCachePage(TUint64 /*aPos*/) |
501 { |
510 { |
611 (void)aParam2; |
620 (void)aParam2; |
612 User::Invariant(); //-- don't call this method in release build |
621 User::Invariant(); //-- don't call this method in release build |
613 #endif //_DEBUG |
622 #endif //_DEBUG |
614 |
623 |
615 return r; |
624 return r; |
616 } |
625 } |
617 |
626 |
618 /** |
627 /** |
619 Implementation of pure virtual function. |
628 Implementation of pure virtual function. |
620 @see MWTCacheInterface::SetCacheBasePos() |
629 @see MWTCacheInterface::SetCacheBasePos() |
621 */ |
630 */ |
622 void CDynamicDirCache::SetCacheBasePos(TInt64 aBasePos) |
631 void CDynamicDirCache::SetCacheBasePos(TInt64 aBasePos) |
623 { |
632 { |
624 iCacheBasePos = aBasePos; |
633 iCacheBasePos = aBasePos; |
625 } |
634 } |
626 |
635 |
627 /** |
636 /** |
628 Implementation of pure virtual function. |
637 Implementation of pure virtual function. |
629 @see MWTCacheInterface::SetCacheBasePos() |
638 @see MWTCacheInterface::SetCacheBasePos() |
630 */ |
639 */ |
631 TUint32 CDynamicDirCache::PageSizeInBytesLog2() const |
640 TUint32 CDynamicDirCache::PageSizeInBytesLog2() const |
632 { |
641 { |
633 return iPageSizeLog2; |
642 return iPageSizeLog2; |
634 } |
643 } |
635 |
644 |
636 /** |
645 /** |
637 Implementation of pure virtual function. |
646 Implementation of pure virtual function. |
638 @see MWTCacheInterface::MakePageMRU() |
647 @see MWTCacheInterface::MakePageMRU() |
639 */ |
648 */ |
640 void CDynamicDirCache::MakePageMRU(TInt64 aPos) |
649 void CDynamicDirCache::MakePageMRU(TInt64 aPos) |
641 { |
650 { |
642 __PRINT1(_L("MakePageMRU (%lx)"), aPos); |
651 __PRINT1(_L("MakePageMRU (%lx)"), aPos); |
643 // __PRINT4(_L("Current Cache State: iLockedQCount=%d, iUnlockedQCount=%d, iLookupTbl=%d, iMaxSizeInPages=%d"), iLockedQCount, iUnlockedQCount, iLookupTable.Count(), iMaxSizeInPages); |
652 // __PRINT4(_L("Current Cache State: iLockedQCount=%d, iUnlockedQCount=%d, iLookupTbl=%d, iMaxSizeInPages=%d"), iLockedQCount, iUnlockedQCount, iLookupTable.Count(), iMaxSizeInPages); |
644 // check the MRU page first, if it is already the MRU page, we can return immediately |
653 // check the MRU page first, if it is already the MRU page, we can return immediately |
645 TInt64 pageStartMedPos = CalcPageStartPos(aPos); |
654 TInt64 pageStartMedPos = CalcPageStartPos(aPos); |
646 if (!iLockedQ.IsEmpty()) |
655 if (!iLockedQ.IsEmpty()) |
647 { |
656 { |
648 if (iLockedQ.First()->StartPos() == pageStartMedPos) |
657 if (iLockedQ.First()->StartPos() == pageStartMedPos) |
649 { |
658 { |
650 return; |
659 return; |
651 } |
660 } |
652 } |
661 } |
653 |
662 |
654 TDynamicDirCachePage* pPage = FindPageByPos(aPos); |
663 TDynamicDirCachePage* pPage = FindPageByPos(aPos); |
655 if (pPage) |
664 if (pPage) |
656 { |
665 { |
657 ASSERT(pPage->IsValid()); |
666 ASSERT(pPage->IsValid()); |
658 // lock page before make it MRU |
667 // lock page before make it MRU |
659 if (pPage->PageType() == TDynamicDirCachePage::EUnlocked) |
668 if (pPage->PageType() == TDynamicDirCachePage::EUnlocked) |
660 { |
669 { |
661 ASSERT(!pPage->IsLocked()); |
670 ASSERT(!pPage->IsLocked()); |
662 if (LockPage(pPage) == NULL) |
671 if (LockPage(pPage) == NULL) |
663 { |
672 { |
664 DeQueue(pPage); |
673 DeQueue(pPage); |
665 LookupTblRemove(pPage->StartPos()); |
674 LookupTblRemove(pPage->StartPos()); |
666 DecommitPage(pPage); |
675 DecommitPage(pPage); |
667 delete pPage; |
676 delete pPage; |
668 pPage = NULL; |
677 pPage = NULL; |
669 } |
678 } |
670 } |
679 } |
671 else |
680 else |
672 { |
681 { |
673 // error checking: page should either be locked or active |
682 // error checking: page should either be locked or active |
674 ASSERT(LockPage(pPage) != NULL); |
683 ASSERT(LockPage(pPage) != NULL); |
675 } |
684 } |
676 } |
685 } |
677 |
686 |
678 // if page not found or page data not valid anymore, use active page to read data |
687 // if page not found or page data not valid anymore, use active page to read data |
679 if (!pPage) |
688 if (!pPage) |
680 { |
689 { |
681 TRAPD(err, pPage = UpdateActivePageL(aPos)); |
690 TRAPD(err, pPage = UpdateActivePageL(aPos)); |
682 if (err != KErrNone) |
691 if (err != KErrNone) |
683 { |
692 { |
684 // problem occurred reading active page, return immediately. |
693 // problem occurred reading active page, return immediately. |
685 return; |
694 return; |
686 } |
695 } |
687 } |
696 } |
688 |
697 |
689 // by now, the page is either locked or active page |
698 // by now, the page is either locked or active page |
690 ASSERT(pPage && pPage->IsValid() && pPage->IsLocked()); |
699 ASSERT(pPage && pPage->IsValid() && pPage->IsLocked()); |
691 |
700 |
692 switch (pPage->PageType()) |
701 switch (pPage->PageType()) |
693 { |
702 { |
694 // if the page is the active page, we will need to find a new active page for replacement |
703 // if the page is the active page, we will need to find a new active page for replacement |
695 case TDynamicDirCachePage::EActivePage: |
704 case TDynamicDirCachePage::EActivePage: |
696 { |
705 { |
697 TDynamicDirCachePage* newAP = NULL; |
706 TDynamicDirCachePage* newAP = NULL; |
698 // if there is more cache room available, try to create a new page first |
707 // if there is more cache room available, try to create a new page first |
699 if (!CacheIsFull()) |
708 if (!CacheIsFull()) |
700 { |
709 { |
701 // allocate and lock a new page |
710 // allocate and lock a new page |
702 TRAPD(err, newAP = AllocateAndLockNewPageL(0)); |
711 TRAPD(err, newAP = AllocateAndLockNewPageL(0)); |
703 // if any error ocurrs, return immediately |
712 // if any error ocurrs, return immediately |
704 if (err != KErrNone) |
713 if (err != KErrNone) |
705 { |
714 { |
706 // unlock the page that was originally unlocked before leave |
715 // unlock the page that was originally unlocked before leave |
707 if (pPage->PageType() == TDynamicDirCachePage::EUnlocked) |
716 if (pPage->PageType() == TDynamicDirCachePage::EUnlocked) |
708 { |
717 { |
709 UnlockPage(pPage); |
718 UnlockPage(pPage); |
710 } |
719 } |
711 return; |
720 return; |
712 } |
721 } |
713 |
722 |
714 if (newAP) |
723 if (newAP) |
715 { |
724 { |
716 // replace the active page with the new page |
725 // replace the active page with the new page |
717 newAP->SetPageType(TDynamicDirCachePage::EActivePage); |
726 newAP->SetPageType(TDynamicDirCachePage::EActivePage); |
718 iActivePage = newAP; |
727 iActivePage = newAP; |
719 } |
728 } |
720 } |
729 } |
721 |
730 |
722 // if cache has grown to its max size, or new page allocation failed |
731 // if cache has grown to its max size, or new page allocation failed |
723 if (!newAP) |
732 if (!newAP) |
724 { |
733 { |
725 // try to lock the LRU page on the unlocked page queque first |
734 // try to lock the LRU page on the unlocked page queque first |
726 if (!iUnlockedQ.IsEmpty()) |
735 if (!iUnlockedQ.IsEmpty()) |
727 { |
736 { |
728 newAP = iUnlockedQ.Last(); |
737 newAP = iUnlockedQ.Last(); |
729 ASSERT(newAP->IsValid()); |
738 ASSERT(newAP->IsValid()); |
730 if (LockPage(newAP) != NULL) |
739 if (LockPage(newAP) != NULL) |
731 { |
740 { |
732 // deque, reset pos, set new type |
741 // deque, reset pos, set new type |
733 DeQueue(newAP); |
742 DeQueue(newAP); |
734 LookupTblRemove(newAP->StartPos()); |
743 LookupTblRemove(newAP->StartPos()); |
735 ResetPagePos(newAP); |
744 ResetPagePos(newAP); |
736 newAP->SetPageType(TDynamicDirCachePage::EActivePage); |
745 newAP->SetPageType(TDynamicDirCachePage::EActivePage); |
737 // replace active page |
746 // replace active page |
738 iActivePage = newAP; |
747 iActivePage = newAP; |
739 } |
748 } |
740 // if falied locking the LRU page from unclocked queque, |
749 // if falied locking the LRU page from unclocked queque, |
741 // delete it |
750 // delete it |
742 else |
751 else |
743 { |
752 { |
744 DeQueue(newAP); |
753 DeQueue(newAP); |
745 LookupTblRemove(newAP->StartPos()); |
754 LookupTblRemove(newAP->StartPos()); |
746 DecommitPage(newAP); |
755 DecommitPage(newAP); |
747 delete newAP; |
756 delete newAP; |
748 newAP = NULL; |
757 newAP = NULL; |
749 } |
758 } |
750 } |
759 } |
751 } |
760 } |
752 |
761 |
753 // if still have not found new active page |
762 // if still have not found new active page |
754 // grab the LRU page from Locked Page Queue for active page |
763 // grab the LRU page from Locked Page Queue for active page |
755 if (!newAP) |
764 if (!newAP) |
756 { |
765 { |
757 ASSERT(!iLockedQ.IsEmpty()); |
766 ASSERT(!iLockedQ.IsEmpty()); |
758 newAP = iLockedQ.Last(); |
767 newAP = iLockedQ.Last(); |
759 // deque, reset pos, set new type |
768 // deque, reset pos, set new type |
760 DeQueue(newAP); |
769 DeQueue(newAP); |
761 LookupTblRemove(newAP->StartPos()); |
770 LookupTblRemove(newAP->StartPos()); |
762 ResetPagePos(newAP); |
771 ResetPagePos(newAP); |
763 newAP->SetPageType(TDynamicDirCachePage::EActivePage); |
772 newAP->SetPageType(TDynamicDirCachePage::EActivePage); |
764 // replace active page |
773 // replace active page |
765 iActivePage = newAP; |
774 iActivePage = newAP; |
766 } |
775 } |
767 |
776 |
768 // we should always be able to find a locked page for active page |
777 // we should always be able to find a locked page for active page |
769 ASSERT(newAP != NULL); |
778 ASSERT(newAP != NULL); |
770 |
779 |
771 // make original page (i.e. former active page) MRU |
780 // make original page (i.e. former active page) MRU |
772 // add onto locked queue |
781 // add onto locked queue |
773 AddFirstOntoQueue(pPage, TDynamicDirCachePage::ELocked); |
782 AddFirstOntoQueue(pPage, TDynamicDirCachePage::ELocked); |
774 // add onto lookuptbl, as active page is not on lookup tbl originally |
783 // add onto lookuptbl, as active page is not on lookup tbl originally |
775 LookupTblAdd(pPage); |
784 LookupTblAdd(pPage); |
776 // check cache limit |
785 // check cache limit |
777 CheckThresholds(); |
786 CheckThresholds(); |
778 return; |
787 return; |
779 } |
788 } |
780 case TDynamicDirCachePage::EUnlocked: |
789 case TDynamicDirCachePage::EUnlocked: |
781 { |
790 { |
782 // if page was originally on Unlocked Page Queque, remove it from Unlocked Page Queue, add it |
791 // if page was originally on Unlocked Page Queque, remove it from Unlocked Page Queue, add it |
783 // to the Locked Page Queue and make it MRU |
792 // to the Locked Page Queue and make it MRU |
784 DeQueue(pPage); |
793 DeQueue(pPage); |
785 AddFirstOntoQueue(pPage, TDynamicDirCachePage::ELocked); |
794 AddFirstOntoQueue(pPage, TDynamicDirCachePage::ELocked); |
786 // check cache limit |
795 // check cache limit |
787 CheckThresholds(); |
796 CheckThresholds(); |
788 return; |
797 return; |
789 } |
798 } |
790 case TDynamicDirCachePage::ELocked: |
799 case TDynamicDirCachePage::ELocked: |
791 { |
800 { |
792 // otherwise the page was on Locked Page Queue, make it MRU |
801 // otherwise the page was on Locked Page Queue, make it MRU |
793 // no need to check cache limit |
802 // no need to check cache limit |
794 if (pPage != iLockedQ.First()) |
803 if (pPage != iLockedQ.First()) |
795 { |
804 { |
796 DeQueue(pPage); |
805 DeQueue(pPage); |
797 AddFirstOntoQueue(pPage, TDynamicDirCachePage::ELocked); |
806 AddFirstOntoQueue(pPage, TDynamicDirCachePage::ELocked); |
798 return; |
807 return; |
799 } |
808 } |
800 break; |
809 break; |
801 } |
810 } |
802 default: |
811 default: |
803 ASSERT(0); |
812 ASSERT(0); |
804 } |
813 } |
805 } |
814 } |
806 |
815 |
807 //==================================================================== |
816 //==================================================================== |
808 /** |
817 /** |
809 Internal query function, to check if aPos is cached or not. iActive page is included in searching. |
818 Internal query function, to check if aPos is cached or not. iActive page is included in searching. |
810 */ |
819 */ |
811 TDynamicDirCachePage* CDynamicDirCache::FindPageByPos(TInt64 aPos) |
820 TDynamicDirCachePage* CDynamicDirCache::FindPageByPos(TInt64 aPos) |
812 { |
821 { |
813 __PRINT1(_L("CDynamicDirCache::FindPageByPos(aPos=%lx)"), aPos); |
822 __PRINT1(_L("CDynamicDirCache::FindPageByPos(aPos=%lx)"), aPos); |
814 // align the page position |
823 // align the page position |
815 TInt64 pageStartMedPos = CalcPageStartPos(aPos); |
824 TInt64 pageStartMedPos = CalcPageStartPos(aPos); |
816 |
825 |
817 if ((iActivePage->StartPos() == pageStartMedPos)) |
826 if ((iActivePage->StartPos() == pageStartMedPos)) |
818 { |
827 { |
819 ASSERT(iActivePage->IsValid()); |
828 ASSERT(iActivePage->IsValid()); |
820 return iActivePage; |
829 return iActivePage; |
821 } |
830 } |
822 |
831 |
823 // search in lookup table |
832 // search in lookup table |
824 return LookupTblFind(pageStartMedPos); |
833 return LookupTblFind(pageStartMedPos); |
825 } |
834 } |
826 |
835 |
827 /** |
836 /** |
828 read a page length data into iActive page and return iActive page if read is successful. |
837 read a page length data into iActive page and return iActive page if read is successful. |
829 */ |
838 */ |
830 TDynamicDirCachePage* CDynamicDirCache::UpdateActivePageL(TInt64 aPos) |
839 TDynamicDirCachePage* CDynamicDirCache::UpdateActivePageL(TInt64 aPos) |
831 { |
840 { |
832 // align the page position |
841 // align the page position |
833 TInt64 pageStartMedPos = CalcPageStartPos(aPos); |
842 TInt64 pageStartMedPos = CalcPageStartPos(aPos); |
834 |
843 |
835 if (iActivePage->StartPos() == pageStartMedPos && iActivePage->IsValid()) |
844 if (iActivePage->StartPos() == pageStartMedPos && iActivePage->IsValid()) |
836 { |
845 { |
837 return iActivePage; |
846 return iActivePage; |
838 } |
847 } |
839 |
848 |
840 __PRINT2(_L("CDynamicDirCache::UpdateActivePageL(aPos=%lx, active=%lx)"), aPos, iActivePage->StartPos()); |
849 __PRINT2(_L("CDynamicDirCache::UpdateActivePageL(aPos=%lx, active=%lx)"), aPos, iActivePage->StartPos()); |
841 |
850 |
842 // set start med pos value, no other effects, only available to active page |
851 // set start med pos value, no other effects, only available to active page |
843 iActivePage->SetPos(pageStartMedPos); |
852 iActivePage->SetPos(pageStartMedPos); |
844 |
853 |
845 // read data, make active page valid |
854 // read data, make active page valid |
846 TUint8* data = iActivePage->PtrInPage(iActivePage->iStartMedPos); |
855 TUint8* data = iActivePage->PtrInPage(iActivePage->iStartMedPos); |
847 TPtr8 dataPtr(data, iPageSizeInBytes); |
856 TPtr8 dataPtr(data, iPageSizeInBytes); |
848 const TInt nErr = iDrive.ReadNonCritical(iActivePage->iStartMedPos, iPageSizeInBytes, dataPtr); |
857 const TInt nErr = iDrive.ReadNonCritical(iActivePage->iStartMedPos, iPageSizeInBytes, dataPtr); |
849 if(nErr !=KErrNone) |
858 if(nErr !=KErrNone) |
850 { |
859 { |
851 // some serious problem occured during reading, invalidate cache. |
860 // some serious problem occured during reading, invalidate cache. |
853 User::Leave(nErr); |
862 User::Leave(nErr); |
854 } |
863 } |
855 iActivePage->SetValid(ETrue); |
864 iActivePage->SetValid(ETrue); |
856 |
865 |
857 return iActivePage; |
866 return iActivePage; |
858 } |
867 } |
859 |
868 |
860 /** |
869 /** |
861 Check if the number of (locked pages + iActive page) and unlocked pages have exceeded minimum allowed page |
870 Check if the number of (locked pages + iActive page) and unlocked pages have exceeded minimum allowed page |
862 number and maximum allowed page number respectively. |
871 number and maximum allowed page number respectively. |
863 */ |
872 */ |
864 void CDynamicDirCache::CheckThresholds() |
873 void CDynamicDirCache::CheckThresholds() |
865 { |
874 { |
866 while (iLockedQCount + 1 > iMinSizeInPages) |
875 while (iLockedQCount + 1 > iMinSizeInPages) |
867 { |
876 { |
868 TDynamicDirCachePage* movePage = iLockedQ.Last(); |
877 TDynamicDirCachePage* movePage = iLockedQ.Last(); |
869 UnlockPage(movePage); |
878 UnlockPage(movePage); |
870 DeQueue(movePage); |
879 DeQueue(movePage); |
871 TInt err = LookupTblRemove(movePage->StartPos()); |
880 TInt err = LookupTblRemove(movePage->StartPos()); |
872 ASSERT(err == KErrNone); |
881 ASSERT(err == KErrNone); |
873 |
882 |
874 // if it is a valid page, add onto unlocked queue |
883 // if it is a valid page, add onto unlocked queue |
875 if (movePage->StartPos() != 0) |
884 if (movePage->StartPos() != 0) |
876 { |
885 { |
877 ASSERT(movePage->IsValid()); |
886 ASSERT(movePage->IsValid()); |
878 AddFirstOntoQueue(movePage, TDynamicDirCachePage::EUnlocked); |
887 AddFirstOntoQueue(movePage, TDynamicDirCachePage::EUnlocked); |
879 err = LookupTblAdd(movePage); |
888 err = LookupTblAdd(movePage); |
880 ASSERT(err == KErrNone); |
889 ASSERT(err == KErrNone); |
881 } |
890 } |
882 else // reserved page, delete |
891 else // reserved page, delete |
883 { |
892 { |
884 DecommitPage(movePage); |
893 DecommitPage(movePage); |
885 delete movePage; |
894 delete movePage; |
886 } |
895 } |
887 } |
896 } |
888 |
897 |
889 // if unlocked queue exceeds limit, delete LRU page |
898 // if unlocked queue exceeds limit, delete LRU page |
890 // note: all pages on unlocked queue should be valid |
899 // note: all pages on unlocked queue should be valid |
891 while (iUnlockedQCount > iMaxSizeInPages - iMinSizeInPages) |
900 while (iUnlockedQCount > iMaxSizeInPages - iMinSizeInPages) |
892 { |
901 { |
893 TDynamicDirCachePage* removePage = iUnlockedQ.Last(); |
902 TDynamicDirCachePage* removePage = iUnlockedQ.Last(); |
894 ASSERT(removePage->StartPos() != 0 && removePage->IsValid()); |
903 ASSERT(removePage->StartPos() != 0 && removePage->IsValid()); |
895 DeQueue(removePage); |
904 DeQueue(removePage); |
896 LookupTblRemove(removePage->StartPos()); |
905 LookupTblRemove(removePage->StartPos()); |
897 DecommitPage(removePage); |
906 DecommitPage(removePage); |
898 delete removePage; |
907 delete removePage; |
899 } |
908 } |
900 } |
909 } |
901 |
910 |
902 /** |
911 /** |
903 Try to create a new page and lock the page content when it is created. This function should only be called |
912 Try to create a new page and lock the page content when it is created. This function should only be called |
904 when creating iActive page or making a page MRU (which might result in page evictions). |
913 when creating iActive page or making a page MRU (which might result in page evictions). |
905 @return the pointer of the newly created page, or NULL if allocation failed. |
914 @return the pointer of the newly created page, or NULL if allocation failed. |
906 @param aStartMedPos the starting media address of the page to be created. |
915 @param aStartMedPos the starting media address of the page to be created. |
907 @pre aStartMedPos should not already be existing in the cache. |
916 @pre aStartMedPos should not already be existing in the cache. |
908 */ |
917 */ |
909 TDynamicDirCachePage* CDynamicDirCache::AllocateAndLockNewPageL(TInt64 aStartMedPos) |
918 TDynamicDirCachePage* CDynamicDirCache::AllocateAndLockNewPageL(TInt64 aStartMedPos) |
910 { |
919 { |
911 __PRINT1(_L("CDynamicDirCache::AllocateAndLockNewPageL(aStartMedPos=%lx)"), aStartMedPos); |
920 __PRINT1(_L("CDynamicDirCache::AllocateAndLockNewPageL(aStartMedPos=%lx)"), aStartMedPos); |
912 |
921 |
913 TUint8* startRamAddr = iCacheMemoryClient->AllocateAndLockSegments(PageSizeInSegs()); |
922 TUint8* startRamAddr = iCacheMemoryClient->AllocateAndLockSegments(PageSizeInSegs()); |
914 if (startRamAddr) |
923 if (startRamAddr) |
915 { |
924 { |
916 // create new page and return |
925 // create new page and return |
917 TDynamicDirCachePage* pPage = TDynamicDirCachePage::NewL(this, aStartMedPos, startRamAddr); |
926 TDynamicDirCachePage* pPage = TDynamicDirCachePage::NewL(this, aStartMedPos, startRamAddr); |
918 pPage->SetLocked(ETrue); |
927 pPage->SetLocked(ETrue); |
919 pPage->SetValid(EFalse); |
928 pPage->SetValid(EFalse); |
920 return pPage; |
929 return pPage; |
921 } |
930 } |
922 |
931 |
923 return NULL; |
932 return NULL; |
924 } |
933 } |
925 |
934 |
926 #ifdef _DEBUG |
935 #ifdef _DEBUG |
927 /** |
936 /** |
928 Dump cache information, only enabled in debug mode. |
937 Dump cache information, only enabled in debug mode. |
929 @see CDynamicDirCache::Control() |
938 @see CDynamicDirCache::Control() |
930 */ |
939 */ |
931 void CDynamicDirCache::Info() const |
940 void CDynamicDirCache::Info() const |
932 { |
941 { |
933 __PRINT(_L("======== CDynamicDirCache::Info =========")); |
942 __PRINT(_L("======== CDynamicDirCache::Info =========")); |
934 const TUint32 SegmentSizeInBytesLog2 = CCacheMemoryManagerFactory::CacheMemoryManager()->SegmentSizeInBytesLog2(); |
943 const TUint32 SegmentSizeInBytesLog2 = CCacheMemoryManagerFactory::CacheMemoryManager()->SegmentSizeInBytesLog2(); |
935 // page size |
944 // page size |
936 __PRINT1(_L("=== Pages size: [%d Bytes]"), iPageSizeInBytes); |
945 __PRINT1(_L("=== Pages size: [%d Bytes]"), iPageSizeInBytes); |
937 __PRINT1(_L("=== Segment size: [%d Bytes]"), 1 << SegmentSizeInBytesLog2); |
946 __PRINT1(_L("=== Segment size: [%d Bytes]"), 1 << SegmentSizeInBytesLog2); |
938 |
947 |
939 // data size: |
948 // data size: |
940 __PRINT1(_L("=== Min data size: [%d Bytes]"), iMinSizeInPages << iPageSizeLog2); |
949 __PRINT1(_L("=== Min data size: [%d Bytes]"), iMinSizeInPages << iPageSizeLog2); |
941 __PRINT1(_L("=== Max data size: [%d Bytes]"), iMaxSizeInPages << iPageSizeLog2); |
950 __PRINT1(_L("=== Max data size: [%d Bytes]"), iMaxSizeInPages << iPageSizeLog2); |
942 |
951 |
943 // memory size: |
952 // memory size: |
944 const TUint32 pageMemSizeLog2 = iPageSizeLog2 > SegmentSizeInBytesLog2 ? iPageSizeLog2 : SegmentSizeInBytesLog2; |
953 const TUint32 pageMemSizeLog2 = iPageSizeLog2 > SegmentSizeInBytesLog2 ? iPageSizeLog2 : SegmentSizeInBytesLog2; |
945 __PRINT1(_L("=== Min memory size: [%d Bytes]"), iMinSizeInPages << pageMemSizeLog2); |
954 __PRINT1(_L("=== Min memory size: [%d Bytes]"), iMinSizeInPages << pageMemSizeLog2); |
946 __PRINT1(_L("=== Max memory size: [%d Bytes]"), iMaxSizeInPages << pageMemSizeLog2); |
955 __PRINT1(_L("=== Max memory size: [%d Bytes]"), iMaxSizeInPages << pageMemSizeLog2); |
947 |
956 |
948 // reserved pages |
957 // reserved pages |
949 __PRINT1(_L("=== Number of pages reserved: [%d]"), iMinSizeInPages); |
958 __PRINT1(_L("=== Number of pages reserved: [%d]"), iMinSizeInPages); |
950 __PRINT1(_L("=== Reserved memory: [%d Bytes]"), (iMinSizeInPages * PageSizeInSegs()) << SegmentSizeInBytesLog2); |
959 __PRINT1(_L("=== Reserved memory: [%d Bytes]"), (iMinSizeInPages * PageSizeInSegs()) << SegmentSizeInBytesLog2); |
951 // locked page num |
960 // locked page num |
952 __PRINT1(_L("=== Number of pages locked: [%d]"), iLockedQCount); |
961 __PRINT1(_L("=== Number of pages locked: [%d]"), iLockedQCount); |
953 __PRINT1(_L("=== Locked memory: [%d Bytes]"), (iLockedQCount * PageSizeInSegs()) << SegmentSizeInBytesLog2); |
962 __PRINT1(_L("=== Locked memory: [%d Bytes]"), (iLockedQCount * PageSizeInSegs()) << SegmentSizeInBytesLog2); |
954 // unlocked page num |
963 // unlocked page num |
955 __PRINT1(_L("=== Number of pages unlocked: [%d]"), iUnlockedQCount); |
964 __PRINT1(_L("=== Number of pages unlocked: [%d]"), iUnlockedQCount); |
956 __PRINT1(_L("=== Unlocked memory: [%d Bytes]"), (iUnlockedQCount * PageSizeInSegs()) << SegmentSizeInBytesLog2); |
965 __PRINT1(_L("=== Unlocked memory: [%d Bytes]"), (iUnlockedQCount * PageSizeInSegs()) << SegmentSizeInBytesLog2); |
957 } |
966 } |
958 |
967 |
959 /** |
968 /** |
960 Dump cache content, only enabled in debug mode. |
969 Dump cache content, only enabled in debug mode. |
961 @see CDynamicDirCache::Control() |
970 @see CDynamicDirCache::Control() |
962 */ |
971 */ |
963 void CDynamicDirCache::Dump() |
972 void CDynamicDirCache::Dump() |
964 { |
973 { |
965 __PRINT(_L("======== CDynamicDirCache::Dump =========")); |
974 __PRINT(_L("======== CDynamicDirCache::Dump =========")); |
966 if (!iLockedQ.IsEmpty()) |
975 if (!iLockedQ.IsEmpty()) |
967 { |
976 { |
968 TDblQueIter<TDynamicDirCachePage> q(iLockedQ); |
977 TDblQueIter<TDynamicDirCachePage> q(iLockedQ); |
969 q.SetToFirst(); |
978 q.SetToFirst(); |
970 TInt i = 0; |
979 TInt i = 0; |
971 while((TDynamicDirCachePage*)q) |
980 while((TDynamicDirCachePage*)q) |
972 { |
981 { |
973 TDynamicDirCachePage* pP = q++; |
982 TDynamicDirCachePage* pP = q++; |
974 __PRINT3(_L("=== CDynamicDirCache::iLockedQ\t[%4d](pos=%lx, size=%d)"), i++, pP->StartPos(), pP->PageSizeInBytes()); |
983 __PRINT3(_L("=== CDynamicDirCache::iLockedQ\t[%4d](pos=%lx, size=%d)"), i++, pP->StartPos(), pP->PageSizeInBytes()); |
975 } |
984 } |
976 } |
985 } |
977 if (!iUnlockedQ.IsEmpty()) |
986 if (!iUnlockedQ.IsEmpty()) |
978 { |
987 { |
979 TDblQueIter<TDynamicDirCachePage> q(iUnlockedQ); |
988 TDblQueIter<TDynamicDirCachePage> q(iUnlockedQ); |
980 q.SetToFirst(); |
989 q.SetToFirst(); |
981 TInt i = 0; |
990 TInt i = 0; |
982 while((TDynamicDirCachePage*)q) |
991 while((TDynamicDirCachePage*)q) |
983 { |
992 { |
984 TDynamicDirCachePage* pP = q++; |
993 TDynamicDirCachePage* pP = q++; |
985 __PRINT3(_L("=== CDynamicDirCache::iUnlockedQ\t[%4d](pos=%lx, size=%u)"), i++, pP->StartPos(), pP->PageSizeInBytes()); |
994 __PRINT3(_L("=== CDynamicDirCache::iUnlockedQ\t[%4d](pos=%lx, size=%u)"), i++, pP->StartPos(), pP->PageSizeInBytes()); |
986 } |
995 } |
987 } |
996 } |
988 __PRINT2(_L("=== CDynamicDirCache::iActivePage\t[*](pos=%lx, size=%u)"), iActivePage->StartPos(), iActivePage->PageSizeInBytes()); |
997 __PRINT2(_L("=== CDynamicDirCache::iActivePage\t[*](pos=%lx, size=%u)"), iActivePage->StartPos(), iActivePage->PageSizeInBytes()); |
989 |
998 |
990 if (iLookupTable.Count()) |
999 if (iLookupTable.Count()) |
991 { |
1000 { |
992 TInt i = 0; |
1001 TInt i = 0; |
993 THashSetIter<TLookupEntry> iter(iLookupTable); |
1002 THashSetIter<TLookupEntry> iter(iLookupTable); |
994 TLookupEntry* pEntry; |
1003 TLookupEntry* pEntry; |
995 pEntry = (TLookupEntry*) iter.Next(); |
1004 pEntry = (TLookupEntry*) iter.Next(); |
996 while(pEntry) |
1005 while(pEntry) |
997 { |
1006 { |
998 TDynamicDirCachePage* pP = pEntry->iPage; |
1007 TDynamicDirCachePage* pP = pEntry->iPage; |
999 __PRINT3(_L("=== CDynamicDirCache::iLookupTable\t[%4d](pos=%lx, size=%u)"), i++, pP->StartPos(), pP->PageSizeInBytes()); |
1008 __PRINT3(_L("=== CDynamicDirCache::iLookupTable\t[%4d](pos=%lx, size=%u)"), i++, pP->StartPos(), pP->PageSizeInBytes()); |
1000 pEntry = (TLookupEntry*) iter.Next(); |
1009 pEntry = (TLookupEntry*) iter.Next(); |
1001 }; |
1010 }; |
1002 } |
1011 } |
1003 __PRINT(_L("===========================================\n")); |
1012 __PRINT(_L("===========================================\n")); |
1004 } |
1013 } |
1005 #endif //_DEBUG |
1014 #endif //_DEBUG |
1006 |
1015 |
1007 /** |
1016 /** |
1008 Lock an unlocked page, or do nothing if the page is already locked. |
1017 Lock an unlocked page, or do nothing if the page is already locked. |
1009 @return TUint8* pointer of the page to be locked, if locking is successful, otherwise return NULL. |
1018 @return TUint8* pointer of the page to be locked, if locking is successful, otherwise return NULL. |
1010 @param aPage the pointer of the page to be locked. |
1019 @param aPage the pointer of the page to be locked. |
1011 */ |
1020 */ |
1012 TUint8* CDynamicDirCache::LockPage(TDynamicDirCachePage* aPage) |
1021 TUint8* CDynamicDirCache::LockPage(TDynamicDirCachePage* aPage) |
1013 { |
1022 { |
1014 ASSERT(aPage != NULL); |
1023 ASSERT(aPage != NULL); |
1015 if (aPage->IsLocked()) |
1024 if (aPage->IsLocked()) |
1016 return aPage->StartPtr(); |
1025 return aPage->StartPtr(); |
1017 |
1026 |
1018 TInt r = iCacheMemoryClient->LockSegments(aPage->StartPtr(), PageSizeInSegs()); |
1027 TInt r = iCacheMemoryClient->LockSegments(aPage->StartPtr(), PageSizeInSegs()); |
1019 if (r == KErrNone) |
1028 if (r == KErrNone) |
1020 { |
1029 { |
1021 aPage->SetLocked(ETrue); |
1030 aPage->SetLocked(ETrue); |
1022 return aPage->StartPtr(); |
1031 return aPage->StartPtr(); |
1023 } |
1032 } |
1024 |
1033 |
1025 return NULL; |
1034 return NULL; |
1026 } |
1035 } |
1027 |
1036 |
1028 /** |
1037 /** |
1029 Unlock a locked page. |
1038 Unlock a locked page. |
1030 @return TInt KErrNone if unlocking was successful, otherwise system-wide error code. |
1039 @return TInt KErrNone if unlocking was successful, otherwise system-wide error code. |
1031 @param aPage the pointer of the page to be unlocked. |
1040 @param aPage the pointer of the page to be unlocked. |
1032 */ |
1041 */ |
1033 TInt CDynamicDirCache::UnlockPage(TDynamicDirCachePage* aPage) |
1042 TInt CDynamicDirCache::UnlockPage(TDynamicDirCachePage* aPage) |
1034 { |
1043 { |
1035 ASSERT(aPage != NULL); |
1044 ASSERT(aPage != NULL); |
1036 __PRINT1(_L("CDynamicDirCache::UnlockPage(%lx)"), aPage->StartPos()); |
1045 __PRINT1(_L("CDynamicDirCache::UnlockPage(%lx)"), aPage->StartPos()); |
1037 TInt r = iCacheMemoryClient->UnlockSegments(aPage->StartPtr(), PageSizeInSegs()); |
1046 TInt r = iCacheMemoryClient->UnlockSegments(aPage->StartPtr(), PageSizeInSegs()); |
1038 if (r == KErrNone) |
1047 if (r == KErrNone) |
1039 { |
1048 { |
1040 aPage->SetLocked(EFalse); |
1049 aPage->SetLocked(EFalse); |
1041 } |
1050 } |
1042 return r; |
1051 return r; |
1043 } |
1052 } |
1044 |
1053 |
1045 /** |
1054 /** |
1046 Decommit a locked or unlocked page. |
1055 Decommit a locked or unlocked page. |
1047 @return TInt KErrNone if decommition was successful, otherwise system-wide error code. |
1056 @return TInt KErrNone if decommition was successful, otherwise system-wide error code. |
1048 @param aPage the pointer of the page to be decommitted. |
1057 @param aPage the pointer of the page to be decommitted. |
1049 */ |
1058 */ |
1050 TInt CDynamicDirCache::DecommitPage(TDynamicDirCachePage* aPage) |
1059 TInt CDynamicDirCache::DecommitPage(TDynamicDirCachePage* aPage) |
1051 { |
1060 { |
1052 ASSERT(aPage != NULL); |
1061 ASSERT(aPage != NULL); |
1053 __PRINT1(_L("CDynamicDirCache::DecommitPage(%lx)"), aPage->StartPos()); |
1062 __PRINT1(_L("CDynamicDirCache::DecommitPage(%lx)"), aPage->StartPos()); |
1054 if (aPage) |
1063 if (aPage) |
1055 { |
1064 { |
1056 TInt r = iCacheMemoryClient->DecommitSegments(aPage->StartPtr(), PageSizeInSegs()); |
1065 TInt r = iCacheMemoryClient->DecommitSegments(aPage->StartPtr(), PageSizeInSegs()); |
1057 if (r == KErrNone) |
1066 if (r == KErrNone) |
1058 { |
1067 { |
1059 aPage->SetLocked(EFalse); |
1068 aPage->SetLocked(EFalse); |
1060 aPage->SetValid(EFalse); |
1069 aPage->SetValid(EFalse); |
1061 } |
1070 } |
1062 return r; |
1071 return r; |
1063 } |
1072 } |
1064 return KErrArgument; |
1073 return KErrArgument; |
1065 } |
1074 } |
1066 |
1075 |
1067 /////////////////////////// aluxiliary functions ////////////////////////////////// |
1076 /////////////////////////// aluxiliary functions ////////////////////////////////// |
1068 /** |
1077 /** |
1069 Calculate the page size in segments. Segment size is the size of the kernel memory unit that cache memory manager manages. |
1078 Calculate the page size in segments. Segment size is the size of the kernel memory unit that cache memory manager manages. |
1070 We are making assumption here about the page size: page size should always be either less than segment size |
1079 We are making assumption here about the page size: page size should always be either less than segment size |
1071 or multiple times of segment size |
1080 or multiple times of segment size |
1072 @return TUint32 the page size in segments. |
1081 @return TUint32 the page size in segments. |
1073 */ |
1082 */ |
1074 TUint32 CDynamicDirCache::PageSizeInSegs() const |
1083 TUint32 CDynamicDirCache::PageSizeInSegs() const |
1075 { |
1084 { |
1076 // initialize cache memory manager as all file systems have mounted by now |
1085 // initialize cache memory manager as all file systems have mounted by now |
1077 ASSERT(CCacheMemoryManagerFactory::CacheMemoryManager()); |
1086 ASSERT(CCacheMemoryManagerFactory::CacheMemoryManager()); |
1078 const TUint32 SegmentSizeInBytesLog2 = CCacheMemoryManagerFactory::CacheMemoryManager()->SegmentSizeInBytesLog2(); |
1087 const TUint32 SegmentSizeInBytesLog2 = CCacheMemoryManagerFactory::CacheMemoryManager()->SegmentSizeInBytesLog2(); |
1079 |
1088 |
1080 // Page size should be non-zero |
1089 // Page size should be non-zero |
1081 ASSERT(iPageSizeInBytes); |
1090 ASSERT(iPageSizeInBytes); |
1082 |
1091 |
1083 TUint32 segs = iPageSizeInBytes >> SegmentSizeInBytesLog2; |
1092 TUint32 segs = iPageSizeInBytes >> SegmentSizeInBytesLog2; |
1084 return segs > 0 ? segs : 1; |
1093 return segs > 0 ? segs : 1; |
1085 } |
1094 } |
1086 |
1095 |
1087 /** |
1096 /** |
1088 Deque the page from locked queue or unlocked queue. All pages are managed through these two queues, expect iActive |
1097 Deque the page from locked queue or unlocked queue. All pages are managed through these two queues, expect iActive |
1089 page. |
1098 page. |
1090 @param aPage the pointer of the page to be dequeued |
1099 @param aPage the pointer of the page to be dequeued |
1091 @return TInt KErrArgument if aPage is invalid, otherwise KErrNone. |
1100 @return TInt KErrArgument if aPage is invalid, otherwise KErrNone. |
1092 */ |
1101 */ |
1093 TInt CDynamicDirCache::DeQueue(TDynamicDirCachePage* aPage) |
1102 TInt CDynamicDirCache::DeQueue(TDynamicDirCachePage* aPage) |
1094 { |
1103 { |
1095 ASSERT(aPage); |
1104 ASSERT(aPage); |
1096 if (!aPage) |
1105 if (!aPage) |
1097 return KErrArgument; |
1106 return KErrArgument; |
1098 |
1107 |
1099 if (aPage->iType == TDynamicDirCachePage::ELocked) |
1108 if (aPage->iType == TDynamicDirCachePage::ELocked) |
1100 { |
1109 { |
1101 aPage->Deque(); |
1110 aPage->Deque(); |
1102 aPage->SetPageType(TDynamicDirCachePage::EUnknown); |
1111 aPage->SetPageType(TDynamicDirCachePage::EUnknown); |
1103 --iLockedQCount; |
1112 --iLockedQCount; |
1104 } |
1113 } |
1105 else if (aPage->iType == TDynamicDirCachePage::EUnlocked) |
1114 else if (aPage->iType == TDynamicDirCachePage::EUnlocked) |
1106 { |
1115 { |
1107 aPage->Deque(); |
1116 aPage->Deque(); |
1108 aPage->SetPageType(TDynamicDirCachePage::EUnknown); |
1117 aPage->SetPageType(TDynamicDirCachePage::EUnknown); |
1109 --iUnlockedQCount; |
1118 --iUnlockedQCount; |
1110 } |
1119 } |
1111 else |
1120 else |
1112 { |
1121 { |
1113 ASSERT(0); |
1122 ASSERT(0); |
1114 return KErrArgument; |
1123 return KErrArgument; |
1115 } |
1124 } |
1116 return KErrNone; |
1125 return KErrNone; |
1117 } |
1126 } |
1118 |
1127 |
1119 /** |
1128 /** |
1120 Insert a page to the first position of locked queue or unlocked queue. |
1129 Insert a page to the first position of locked queue or unlocked queue. |
1121 @param aPage the pointer of the page to be inserted. |
1130 @param aPage the pointer of the page to be inserted. |
1122 @param aType the type of the queue to be inserted. |
1131 @param aType the type of the queue to be inserted. |
1123 @return TInt KErrArgument if aPage is invalid, otherwise KErrNone. |
1132 @return TInt KErrArgument if aPage is invalid, otherwise KErrNone. |
1124 */ |
1133 */ |
1125 TInt CDynamicDirCache::AddFirstOntoQueue(TDynamicDirCachePage* aPage, TDynamicDirCachePage::TPageType aType) |
1134 TInt CDynamicDirCache::AddFirstOntoQueue(TDynamicDirCachePage* aPage, TDynamicDirCachePage::TPageType aType) |
1126 { |
1135 { |
1127 ASSERT(aPage); |
1136 ASSERT(aPage); |
1128 if (!aPage) |
1137 if (!aPage) |
1129 return KErrArgument; |
1138 return KErrArgument; |
1130 |
1139 |
1131 // page must be dequed first or it is active page |
1140 // page must be dequed first or it is active page |
1132 if (aPage->iType != TDynamicDirCachePage::EActivePage && aPage->iType != TDynamicDirCachePage::EUnknown) |
1141 if (aPage->iType != TDynamicDirCachePage::EActivePage && aPage->iType != TDynamicDirCachePage::EUnknown) |
1133 { |
1142 { |
1134 ASSERT(0); |
1143 ASSERT(0); |
1135 return KErrArgument; |
1144 return KErrArgument; |
1136 } |
1145 } |
1137 |
1146 |
1138 if (aType == TDynamicDirCachePage::ELocked) |
1147 if (aType == TDynamicDirCachePage::ELocked) |
1139 { |
1148 { |
1140 iLockedQ.AddFirst(*aPage); |
1149 iLockedQ.AddFirst(*aPage); |
1141 aPage->SetPageType(TDynamicDirCachePage::ELocked); |
1150 aPage->SetPageType(TDynamicDirCachePage::ELocked); |
1142 ++iLockedQCount; |
1151 ++iLockedQCount; |
1143 } |
1152 } |
1144 else if (aType == TDynamicDirCachePage::EUnlocked) |
1153 else if (aType == TDynamicDirCachePage::EUnlocked) |
1145 { |
1154 { |
1146 iUnlockedQ.AddFirst(*aPage); |
1155 iUnlockedQ.AddFirst(*aPage); |
1147 aPage->SetPageType(TDynamicDirCachePage::EUnlocked); |
1156 aPage->SetPageType(TDynamicDirCachePage::EUnlocked); |
1148 ++iUnlockedQCount; |
1157 ++iUnlockedQCount; |
1149 } |
1158 } |
1150 else |
1159 else |
1151 { |
1160 { |
1152 ASSERT(0); |
1161 ASSERT(0); |
1153 return KErrArgument; |
1162 return KErrArgument; |
1154 } |
1163 } |
1155 |
1164 |
1156 return KErrNone; |
1165 return KErrNone; |
1157 } |
1166 } |
1158 |
1167 |
1159 /** |
1168 /** |
1160 Remove a page from the lookup table, indexed by the starting media address of the page content. |
1169 Remove a page from the lookup table, indexed by the starting media address of the page content. |
1161 @param aPagePos the starting media position of the page to be removed. |
1170 @param aPagePos the starting media position of the page to be removed. |
1162 */ |
1171 */ |
1163 TInt CDynamicDirCache::LookupTblRemove(TInt64 aPagePos) |
1172 TInt CDynamicDirCache::LookupTblRemove(TInt64 aPagePos) |
1164 { |
1173 { |
1165 if (aPagePos == 0) |
1174 if (aPagePos == 0) |
1166 { |
1175 { |
1167 return KErrNone; |
1176 return KErrNone; |
1168 } |
1177 } |
1169 |
1178 |
1170 TInt r = iLookupTable.Remove(TLookupEntry(aPagePos, 0, NULL)); |
1179 TInt r = iLookupTable.Remove(TLookupEntry(aPagePos, 0, NULL)); |
1171 return r; |
1180 return r; |
1172 } |
1181 } |
1173 |
1182 |
1174 /** |
1183 /** |
1175 Insert a page to the lookup table, indexed by the starting media address of the page content. |
1184 Insert a page to the lookup table, indexed by the starting media address of the page content. |
1176 @param aPagePos the starting media position of the page to be inserted. |
1185 @param aPagePos the starting media position of the page to be inserted. |
1177 */ |
1186 */ |
1178 TInt CDynamicDirCache::LookupTblAdd(TDynamicDirCachePage* aPage) |
1187 TInt CDynamicDirCache::LookupTblAdd(TDynamicDirCachePage* aPage) |
1179 { |
1188 { |
1180 ASSERT(aPage); |
1189 ASSERT(aPage); |
1181 if (!aPage) |
1190 if (!aPage) |
1182 return KErrArgument; |
1191 return KErrArgument; |
1183 |
1192 |
1184 if (aPage->StartPos() == 0) |
1193 if (aPage->StartPos() == 0) |
1185 { |
1194 { |
1186 return KErrNone; |
1195 return KErrNone; |
1187 } |
1196 } |
1188 |
1197 |
1189 TInt r = iLookupTable.Insert(TLookupEntry(aPage->StartPos(), iPageSizeInBytes, aPage)); |
1198 TInt r = iLookupTable.Insert(TLookupEntry(aPage->StartPos(), iPageSizeInBytes, aPage)); |
1190 return r; |
1199 return r; |
1191 } |
1200 } |
1192 |
1201 |
1193 /** |
1202 /** |
1194 Reset the media address of the page to 0, also invalidate the page. |
1203 Reset the media address of the page to 0, also invalidate the page. |
1195 @param aPage the pointer of the page to be reset. |
1204 @param aPage the pointer of the page to be reset. |
1196 */ |
1205 */ |
1197 TInt CDynamicDirCache::ResetPagePos(TDynamicDirCachePage* aPage) |
1206 TInt CDynamicDirCache::ResetPagePos(TDynamicDirCachePage* aPage) |
1198 { |
1207 { |
1199 ASSERT(aPage); |
1208 ASSERT(aPage); |
1200 if (!aPage) |
1209 if (!aPage) |
1201 return KErrArgument; |
1210 return KErrArgument; |
1202 |
1211 |
1203 aPage->ResetPos(); |
1212 aPage->ResetPos(); |
1204 return KErrNone; |
1213 return KErrNone; |
1205 } |
1214 } |
1206 |
1215 |
1207 /** |
1216 /** |
1208 Search the lookup table to find the page start with a specific media address. |
1217 Search the lookup table to find the page start with a specific media address. |
1209 @param aPos the starting media address to be searched. |
1218 @param aPos the starting media address to be searched. |
1210 */ |
1219 */ |
1211 TDynamicDirCachePage* CDynamicDirCache::LookupTblFind(TInt64 aPos) |
1220 TDynamicDirCachePage* CDynamicDirCache::LookupTblFind(TInt64 aPos) |
1212 { |
1221 { |
1213 if (aPos == 0) |
1222 if (aPos == 0) |
1214 { |
1223 { |
1215 ASSERT(0); |
1224 ASSERT(0); |
1216 return NULL; |
1225 return NULL; |
1217 } |
1226 } |
1218 |
1227 |
1219 TLookupEntry* entry = iLookupTable.Find(TLookupEntry(aPos, 0, NULL)); |
1228 TLookupEntry* entry = iLookupTable.Find(TLookupEntry(aPos, 0, NULL)); |
1220 if(entry) |
1229 if(entry) |
1221 { |
1230 { |
1222 ASSERT(entry->iPage->IsValid()); |
1231 ASSERT(entry->iPage->IsValid()); |
1223 return entry->iPage; |
1232 return entry->iPage; |
1224 } |
1233 } |
1225 |
1234 |
1226 return NULL; |
1235 return NULL; |
1227 } |
1236 } |