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Overview
| Comment: | When a lock fails due to an I/O error (not an SQLITE_BUSY) then the checkpoint should fail. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
c6eb0a27270df69018576232d8f97c16 |
| User & Date: | drh 2010-06-02 20:38:20 |
Context
|
2010-06-03
| ||
| 09:01 | If a malloc fails while allocating a savepoint object at the pager level, do not try to roll that savepoint back later on. (check-in: 91cb08ff user: dan tags: trunk) | |
|
2010-06-02
| ||
| 20:38 | When a lock fails due to an I/O error (not an SQLITE_BUSY) then the checkpoint should fail. (check-in: c6eb0a27 user: drh tags: trunk) | |
| 18:59 | Fix a problem with rolling back to a savepoint opened before the writer decided to wrap the log file. (check-in: 6b4aed6a user: dan tags: trunk) | |
Changes
Changes to src/wal.c.
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u32 y = pInfo->aReadMark[i];
if( y>0 && (mxSafeFrame==0 || mxSafeFrame>=y) ){
if( y<=pWal->hdr.mxFrame
&& walLockExclusive(pWal, WAL_READ_LOCK(i), 1)==SQLITE_OK
){
pInfo->aReadMark[i] = 0;
walUnlockExclusive(pWal, WAL_READ_LOCK(i), 1);
}else{
mxSafeFrame = y-1;
}
}
}
if( pInfo->nBackfill<mxSafeFrame
&& (rc = walLockExclusive(pWal, WAL_READ_LOCK(0), 1))==SQLITE_OK
){
................................................................................
rc = sqlite3OsSync(pWal->pDbFd, sync_flags);
}
}
}
/* Release the reader lock held while backfilling */
walUnlockExclusive(pWal, WAL_READ_LOCK(0), 1);
}else{
/* Reset the return code so as not to report a checkpoint failure
** just because active readers prevent any backfill.
*/
rc = SQLITE_OK;
}
walIteratorFree(pIter);
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u32 y = pInfo->aReadMark[i];
if( y>0 && (mxSafeFrame==0 || mxSafeFrame>=y) ){
if( y<=pWal->hdr.mxFrame
&& walLockExclusive(pWal, WAL_READ_LOCK(i), 1)==SQLITE_OK
){
pInfo->aReadMark[i] = 0;
walUnlockExclusive(pWal, WAL_READ_LOCK(i), 1);
}else if( rc==SQLITE_BUSY ){
mxSafeFrame = y-1;
}else{
walIteratorFree(pIter);
return rc;
}
}
}
if( pInfo->nBackfill<mxSafeFrame
&& (rc = walLockExclusive(pWal, WAL_READ_LOCK(0), 1))==SQLITE_OK
){
................................................................................
rc = sqlite3OsSync(pWal->pDbFd, sync_flags);
}
}
}
/* Release the reader lock held while backfilling */
walUnlockExclusive(pWal, WAL_READ_LOCK(0), 1);
}else if( rc==SQLITE_BUSY ){
/* Reset the return code so as not to report a checkpoint failure
** just because active readers prevent any backfill.
*/
rc = SQLITE_OK;
}
walIteratorFree(pIter);
|