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Overview
| Comment: | Changes to 3.5.9 proposed by Rob Stoddard. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | branch-3.5.9 |
| Files: | files | file ages | folders |
| SHA1: |
5ed168c48ee4db25e5a3814c79898790 |
| User & Date: | drh 2010-01-29 19:46:07 |
Context
|
2010-01-29
| ||
| 19:50 | Additional changes suggested by Rob Stoddard. Closed-Leaf check-in: 228b8ad9 user: drh tags: branch-3.5.9 | |
| 19:46 | Changes to 3.5.9 proposed by Rob Stoddard. check-in: 5ed168c4 user: drh tags: branch-3.5.9 | |
|
2008-05-14
| ||
| 16:18 | Version 3.5.9 (CVS 5131) check-in: b6129f4c user: drh tags: trunk | |
Changes
Changes to src/pager.c.
1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 .... 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 .... 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 .... 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 |
** Clear the in-memory cache. This routine
** sets the state of the pager back to what it was when it was first
** opened. Any outstanding pages are invalidated and subsequent attempts
** to access those pages will likely result in a coredump.
*/
static void pager_reset(Pager *pPager){
PgHdr *pPg, *pNext;
if( pPager->errCode ) return;
for(pPg=pPager->pAll; pPg; pPg=pNext){
IOTRACE(("PGFREE %p %d\n", pPager, pPg->pgno));
PAGER_INCR(sqlite3_pager_pgfree_count);
pNext = pPg->pNextAll;
lruListRemove(pPg);
sqlite3_free(pPg->pData);
sqlite3_free(pPg);
................................................................................
pPager->pAll = 0;
pPager->pDirty = 0;
pPager->nHash = 0;
sqlite3_free(pPager->aHash);
pPager->nPage = 0;
pPager->aHash = 0;
pPager->nRef = 0;
}
/*
** Unlock the database file.
**
** If the pager is currently in error state, discard the contents of
** the cache and reset the Pager structure internal state. If there is
................................................................................
** that page and guarantee a subsequent segfault, it seems better
** to zero it and hope that we error out sanely.
*/
static void pager_truncate_cache(Pager *pPager){
PgHdr *pPg;
PgHdr **ppPg;
int dbSize = pPager->dbSize;
ppPg = &pPager->pAll;
while( (pPg = *ppPg)!=0 ){
if( pPg->pgno<=dbSize ){
ppPg = &pPg->pNextAll;
}else if( pPg->nRef>0 ){
memset(PGHDR_TO_DATA(pPg), 0, pPager->pageSize);
................................................................................
unlinkPage(pPg);
makeClean(pPg);
sqlite3_free(pPg->pData);
sqlite3_free(pPg);
pPager->nPage--;
}
}
}
/*
** Try to obtain a lock on a file. Invoke the busy callback if the lock
** is currently not available. Repeat until the busy callback returns
** false or until the lock succeeds.
**
|
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** Clear the in-memory cache. This routine
** sets the state of the pager back to what it was when it was first
** opened. Any outstanding pages are invalidated and subsequent attempts
** to access those pages will likely result in a coredump.
*/
static void pager_reset(Pager *pPager){
PgHdr *pPg, *pNext;
#ifndef SQLITE_MUTEX_NOOP
sqlite3_mutex *mutex;
#endif
if( pPager->errCode ) return;
#ifndef SQLITE_MUTEX_NOOP
mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM2);
sqlite3_mutex_enter(mutex);
#endif
for(pPg=pPager->pAll; pPg; pPg=pNext){
IOTRACE(("PGFREE %p %d\n", pPager, pPg->pgno));
PAGER_INCR(sqlite3_pager_pgfree_count);
pNext = pPg->pNextAll;
lruListRemove(pPg);
sqlite3_free(pPg->pData);
sqlite3_free(pPg);
................................................................................
pPager->pAll = 0;
pPager->pDirty = 0;
pPager->nHash = 0;
sqlite3_free(pPager->aHash);
pPager->nPage = 0;
pPager->aHash = 0;
pPager->nRef = 0;
sqlite3_mutex_leave(mutex);
}
/*
** Unlock the database file.
**
** If the pager is currently in error state, discard the contents of
** the cache and reset the Pager structure internal state. If there is
................................................................................
** that page and guarantee a subsequent segfault, it seems better
** to zero it and hope that we error out sanely.
*/
static void pager_truncate_cache(Pager *pPager){
PgHdr *pPg;
PgHdr **ppPg;
int dbSize = pPager->dbSize;
#ifndef SQLITE_MUTEX_NOOP
sqlite3_mutex *mutex;
mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM2);
#endif
sqlite3_mutex_enter(mutex);
ppPg = &pPager->pAll;
while( (pPg = *ppPg)!=0 ){
if( pPg->pgno<=dbSize ){
ppPg = &pPg->pNextAll;
}else if( pPg->nRef>0 ){
memset(PGHDR_TO_DATA(pPg), 0, pPager->pageSize);
................................................................................
unlinkPage(pPg);
makeClean(pPg);
sqlite3_free(pPg->pData);
sqlite3_free(pPg);
pPager->nPage--;
}
}
sqlite3_mutex_leave(mutex);
}
/*
** Try to obtain a lock on a file. Invoke the busy callback if the lock
** is currently not available. Repeat until the busy callback returns
** false or until the lock succeeds.
**
|