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Overview
| Comment: | Changes to setupLookaside() in main.c to better handle lookaside buffer configurations of zero-size. Ticket #3616. (CVS 6218) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 0a2c7f740397c5c6373434c75d73c2714f14dd32 |
| User & Date: | shane 2009-01-30 06:11:55 |
Context
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2009-01-30
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| 16:09 | Made code to remove unused parameter warning part of the conditional. Ticket #3610. (CVS 6219) check-in: c5dca114 user: shane tags: trunk | |
| 06:11 | Changes to setupLookaside() in main.c to better handle lookaside buffer configurations of zero-size. Ticket #3616. (CVS 6218) check-in: 0a2c7f74 user: shane tags: trunk | |
| 05:59 | Implemented the SQLITE_LAST_ERRNO op in the xFileControl() method of os_win.c. Ticket #3615. (CVS 6217) check-in: 9ea871f3 user: shane tags: trunk | |
Changes
Changes to src/main.c.
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** ************************************************************************* ** Main file for the SQLite library. The routines in this file ** implement the programmer interface to the library. Routines in ** other files are for internal use by SQLite and should not be ** accessed by users of the library. ** ** $Id: main.c,v 1.522 2009/01/20 16:53:41 danielk1977 Exp $ */ #include "sqliteInt.h" #ifdef SQLITE_ENABLE_FTS3 # include "fts3.h" #endif #ifdef SQLITE_ENABLE_RTREE ................................................................................ ** the lookaside memory. */ static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){ void *pStart; if( db->lookaside.nOut ){ return SQLITE_BUSY; } if( sz<0 ) sz = 0; if( cnt<0 ) cnt = 0; if( pBuf==0 ){ sz = (sz + 7)&~7; sqlite3BeginBenignMalloc(); pStart = sqlite3Malloc( sz*cnt ); sqlite3EndBenignMalloc(); }else{ sz = sz&~7; pStart = pBuf; } if( db->lookaside.bMalloced ){ sqlite3_free(db->lookaside.pStart); } db->lookaside.pStart = pStart; db->lookaside.pFree = 0; db->lookaside.sz = (u16)sz; db->lookaside.bMalloced = pBuf==0 ?1:0; if( pStart ){ int i; LookasideSlot *p; p = (LookasideSlot*)pStart; for(i=cnt-1; i>=0; i--){ p->pNext = db->lookaside.pFree; db->lookaside.pFree = p; p = (LookasideSlot*)&((u8*)p)[sz]; } db->lookaside.pEnd = p; db->lookaside.bEnabled = 1; }else{ db->lookaside.pEnd = 0; db->lookaside.bEnabled = 0; } return SQLITE_OK; } /* ** Return the mutex associated with a database connection. */ |
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** ************************************************************************* ** Main file for the SQLite library. The routines in this file ** implement the programmer interface to the library. Routines in ** other files are for internal use by SQLite and should not be ** accessed by users of the library. ** ** $Id: main.c,v 1.523 2009/01/30 06:11:55 shane Exp $ */ #include "sqliteInt.h" #ifdef SQLITE_ENABLE_FTS3 # include "fts3.h" #endif #ifdef SQLITE_ENABLE_RTREE ................................................................................ ** the lookaside memory. */ static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){ void *pStart; if( db->lookaside.nOut ){ return SQLITE_BUSY; } /* Free any existing lookaside buffer for this handle before ** allocating a new one so we don't have to have space for ** both at the same time. */ if( db->lookaside.bMalloced ){ sqlite3_free(db->lookaside.pStart); } /* The size of a lookaside slot needs to be larger than a pointer ** to be useful. */ if( sz<=sizeof(LookasideSlot*) ) sz = 0; if( cnt<0 ) cnt = 0; if( sz==0 || cnt==0 ){ sz = 0; pStart = 0; }else if( pBuf==0 ){ sz = (sz + 7)&~7; sqlite3BeginBenignMalloc(); pStart = sqlite3Malloc( sz*cnt ); sqlite3EndBenignMalloc(); }else{ sz = sz&~7; pStart = pBuf; } db->lookaside.pStart = pStart; db->lookaside.pFree = 0; db->lookaside.sz = (u16)sz; if( pStart ){ int i; LookasideSlot *p; assert( sz > sizeof(LookasideSlot*) ); p = (LookasideSlot*)pStart; for(i=cnt-1; i>=0; i--){ p->pNext = db->lookaside.pFree; db->lookaside.pFree = p; p = (LookasideSlot*)&((u8*)p)[sz]; } db->lookaside.pEnd = p; db->lookaside.bEnabled = 1; db->lookaside.bMalloced = pBuf==0 ?1:0; }else{ db->lookaside.pEnd = 0; db->lookaside.bEnabled = 0; db->lookaside.bMalloced = 0; } return SQLITE_OK; } /* ** Return the mutex associated with a database connection. */ |