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Overview
| Comment: | Fix a problem when opening a write-transaction while there exist read-only b-tree cursors in mmap mode. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | experimental-mmap |
| Files: | files | file ages | folders |
| SHA1: |
32e0bbb73609ac3ad096a60f1de3095b |
| User & Date: | dan 2013-03-21 15:57:32 |
Context
|
2013-03-21
| ||
| 20:00 | Avoid calling xRead() on a part of the database file that is memory mapped. (check-in: c8eac290 user: dan tags: experimental-mmap) | |
| 15:57 | Fix a problem when opening a write-transaction while there exist read-only b-tree cursors in mmap mode. (check-in: 32e0bbb7 user: dan tags: experimental-mmap) | |
| 14:47 | Do not use the Linux mremap() call. Use the same strategy for xMremap() as on OSX instead. (check-in: 5ed8ad78 user: dan tags: experimental-mmap) | |
Changes
Changes to src/btree.c.
2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 |
BtCursor *pCsr; /* Used to iterate through all open cursors */
for(pCsr=pBt->pCursor; pCsr && rc==SQLITE_OK; pCsr=pCsr->pNext){
if( pCsr->iPage>=0 ){
MemPage *pPg = pCsr->apPage[0];
if( pPg->pDbPage->flags & PGHDR_MMAP ){
MemPage *pNew = 0;
rc = btreeGetPage(pBt, pPg->pgno, &pNew, 0, 0);
if( rc==SQLITE_OK && pCsr->iPage==0 ){
pCsr->info.pCell = pNew->aData + (pCsr->info.pCell - pPg->aData);
}
pCsr->apPage[0] = pNew;
releasePage(pPg);
if( rc!=SQLITE_OK ) return rc;
}
|
| |
2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 |
BtCursor *pCsr; /* Used to iterate through all open cursors */
for(pCsr=pBt->pCursor; pCsr && rc==SQLITE_OK; pCsr=pCsr->pNext){
if( pCsr->iPage>=0 ){
MemPage *pPg = pCsr->apPage[0];
if( pPg->pDbPage->flags & PGHDR_MMAP ){
MemPage *pNew = 0;
rc = getAndInitPage(pBt, pPg->pgno, &pNew, 0);
if( rc==SQLITE_OK && pCsr->iPage==0 ){
pCsr->info.pCell = pNew->aData + (pCsr->info.pCell - pPg->aData);
}
pCsr->apPage[0] = pNew;
releasePage(pPg);
if( rc!=SQLITE_OK ) return rc;
}
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