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Overview
| Comment: | Relax an over-zealous assert() in sqlite3WalUndo(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
8f9d22d58c75ad7476c1eea8ba296347 |
| User & Date: | drh 2010-05-04 17:20:09 |
Context
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2010-05-04
| ||
| 17:38 | Be sure to release all wal-index locks before closing the wal-index. check-in: b15b67fa user: drh tags: trunk | |
| 17:20 | Relax an over-zealous assert() in sqlite3WalUndo(). check-in: 8f9d22d5 user: drh tags: trunk | |
| 16:33 | Take care not to invoke the xShmClose method of the VFS with a NULL shared memory object. check-in: 1465d384 user: drh tags: trunk | |
Changes
Changes to src/wal.c.
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}else if( pWal->lockState==SQLITE_SHM_WRITE ){
rc = walSetLock(pWal, SQLITE_SHM_READ);
}
return rc;
}
/*
** The Wal object passed to this function must be holding the write-lock.
**
** If any data has been written (but not committed) to the log file, this
** function moves the write-pointer back to the start of the transaction.
**
** Additionally, the callback function is invoked for each frame written
** to the log since the start of the transaction. If the callback returns
** other than SQLITE_OK, it is not invoked again and the error code is
** returned to the caller.
................................................................................
** function returns SQLITE_OK.
*/
int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx){
int rc = SQLITE_OK;
Pgno iMax = pWal->hdr.iLastPg;
Pgno iFrame;
assert( pWal->lockState==SQLITE_SHM_WRITE );
walIndexReadHdr(pWal, 0);
for(iFrame=pWal->hdr.iLastPg+1; iFrame<=iMax && rc==SQLITE_OK; iFrame++){
rc = xUndo(pUndoCtx, pWal->pWiData[walIndexEntry(iFrame)]);
}
walIndexUnmap(pWal);
return rc;
}
/* Return an integer that records the current (uncommitted) write
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}else if( pWal->lockState==SQLITE_SHM_WRITE ){
rc = walSetLock(pWal, SQLITE_SHM_READ);
}
return rc;
}
/*
** If any data has been written (but not committed) to the log file, this
** function moves the write-pointer back to the start of the transaction.
**
** Additionally, the callback function is invoked for each frame written
** to the log since the start of the transaction. If the callback returns
** other than SQLITE_OK, it is not invoked again and the error code is
** returned to the caller.
................................................................................
** function returns SQLITE_OK.
*/
int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx){
int rc = SQLITE_OK;
Pgno iMax = pWal->hdr.iLastPg;
Pgno iFrame;
walIndexReadHdr(pWal, 0);
for(iFrame=pWal->hdr.iLastPg+1; iFrame<=iMax && rc==SQLITE_OK; iFrame++){
assert( pWal->lockState==SQLITE_SHM_WRITE );
rc = xUndo(pUndoCtx, pWal->pWiData[walIndexEntry(iFrame)]);
}
walIndexUnmap(pWal);
return rc;
}
/* Return an integer that records the current (uncommitted) write
|