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Overview
| Comment: | Avoid create a stack from in sqlite3BackupUpdate() in the common case where the first argument is NULL. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
2a897b9e94acaf1fd91e9f8e94fa52e0 |
| User & Date: | drh 2015-07-01 19:59:36 |
Context
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2015-07-02
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| 01:38 | Add the --shrink-memory option to the speedtest1 test program. check-in: c9ddbd88 user: drh tags: trunk | |
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2015-07-01
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| 19:59 | Avoid create a stack from in sqlite3BackupUpdate() in the common case where the first argument is NULL. check-in: 2a897b9e user: drh tags: trunk | |
| 17:53 | Simplification of PRAGMA integrity_check logic. Make sure that the depth of the right-most subtree is correct. Size reduction and performance increase, with no change in output. check-in: 550705fc user: drh tags: trunk | |
Changes
Changes to src/backup.c.
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** to be updated with the new data before the backup operation is ** complete. ** ** It is assumed that the mutex associated with the BtShared object ** corresponding to the source database is held when this function is ** called. */ void sqlite3BackupUpdate(sqlite3_backup *pBackup, Pgno iPage, const u8 *aData){ sqlite3_backup *p; /* Iterator variable */ for(p=pBackup; p; p=p->pNext){ assert( sqlite3_mutex_held(p->pSrc->pBt->mutex) ); if( !isFatalError(p->rc) && iPage<p->iNext ){ /* The backup process p has already copied page iPage. But now it ** has been modified by a transaction on the source pager. Copy ** the new data into the backup. */ int rc; ................................................................................ rc = backupOnePage(p, iPage, aData, 1); sqlite3_mutex_leave(p->pDestDb->mutex); assert( rc!=SQLITE_BUSY && rc!=SQLITE_LOCKED ); if( rc!=SQLITE_OK ){ p->rc = rc; } } } } /* ** Restart the backup process. This is called when the pager layer ** detects that the database has been modified by an external database ** connection. In this case there is no way of knowing which of the ** pages that have been copied into the destination database are still |
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** to be updated with the new data before the backup operation is ** complete. ** ** It is assumed that the mutex associated with the BtShared object ** corresponding to the source database is held when this function is ** called. */ static SQLITE_NOINLINE void backupUpdate( sqlite3_backup *p, Pgno iPage, const u8 *aData ){ assert( p!=0 ); do{ assert( sqlite3_mutex_held(p->pSrc->pBt->mutex) ); if( !isFatalError(p->rc) && iPage<p->iNext ){ /* The backup process p has already copied page iPage. But now it ** has been modified by a transaction on the source pager. Copy ** the new data into the backup. */ int rc; ................................................................................ rc = backupOnePage(p, iPage, aData, 1); sqlite3_mutex_leave(p->pDestDb->mutex); assert( rc!=SQLITE_BUSY && rc!=SQLITE_LOCKED ); if( rc!=SQLITE_OK ){ p->rc = rc; } } }while( (p = p->pNext)!=0 ); } void sqlite3BackupUpdate(sqlite3_backup *pBackup, Pgno iPage, const u8 *aData){ if( pBackup ) backupUpdate(pBackup, iPage, aData); } /* ** Restart the backup process. This is called when the pager layer ** detects that the database has been modified by an external database ** connection. In this case there is no way of knowing which of the ** pages that have been copied into the destination database are still |