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Overview
| Comment: | nMax can be zero and subtracting 1 from an unsigned zero produces undesirable results (CVS 6506) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
a117d82dad82bc372bc1e3f1adb9540c |
| User & Date: | aswift 2009-04-14 18:44:39 |
Context
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2009-04-15
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| 13:07 | Disable the temptrigger.test test script when shared cache is disabled. Ticket #3801. (CVS 6507) check-in: feedbce8 user: drh tags: trunk | |
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2009-04-14
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| 18:44 | nMax can be zero and subtracting 1 from an unsigned zero produces undesirable results (CVS 6506) check-in: a117d82d user: aswift tags: trunk | |
| 12:58 | Change the sqlite3_bind_value() implementation to use a default branch on the type switch so that there are no untested jumps in the switch. (CVS 6505) check-in: d0a8bd6a user: drh tags: trunk | |
Changes
Changes to src/pcache1.c.
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** ** This file implements the default page cache implementation (the ** sqlite3_pcache interface). It also contains part of the implementation ** of the SQLITE_CONFIG_PAGECACHE and sqlite3_release_memory() features. ** If the default page cache implementation is overriden, then neither of ** these two features are available. ** ** @(#) $Id: pcache1.c,v 1.10 2009/03/23 04:33:33 danielk1977 Exp $ */ #include "sqliteInt.h" typedef struct PCache1 PCache1; typedef struct PgHdr1 PgHdr1; typedef struct PgFreeslot PgFreeslot; ................................................................................ if( pCache->nPage>=pCache->nHash && pcache1ResizeHash(pCache) ){ goto fetch_out; } /* Step 4. Try to recycle a page buffer if appropriate. */ if( pCache->bPurgeable && pcache1.pLruTail && ( pCache->nPage>=pCache->nMax-1 || pcache1.nCurrentPage>=pcache1.nMaxPage )){ pPage = pcache1.pLruTail; pcache1RemoveFromHash(pPage); pcache1PinPage(pPage); if( pPage->pCache->szPage!=pCache->szPage ){ pcache1FreePage(pPage); pPage = 0; |
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** ** This file implements the default page cache implementation (the ** sqlite3_pcache interface). It also contains part of the implementation ** of the SQLITE_CONFIG_PAGECACHE and sqlite3_release_memory() features. ** If the default page cache implementation is overriden, then neither of ** these two features are available. ** ** @(#) $Id: pcache1.c,v 1.11 2009/04/14 18:44:39 aswift Exp $ */ #include "sqliteInt.h" typedef struct PCache1 PCache1; typedef struct PgHdr1 PgHdr1; typedef struct PgFreeslot PgFreeslot; ................................................................................ if( pCache->nPage>=pCache->nHash && pcache1ResizeHash(pCache) ){ goto fetch_out; } /* Step 4. Try to recycle a page buffer if appropriate. */ if( pCache->bPurgeable && pcache1.pLruTail && ( (pCache->nPage+1>=pCache->nMax) || pcache1.nCurrentPage>=pcache1.nMaxPage )){ pPage = pcache1.pLruTail; pcache1RemoveFromHash(pPage); pcache1PinPage(pPage); if( pPage->pCache->szPage!=pCache->szPage ){ pcache1FreePage(pPage); pPage = 0; |