Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
| Comment: | Another minor fix to checkpoint on the WAL branch. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | wal-incr-ckpt |
| Files: | files | file ages | folders |
| SHA1: |
853f1e3f7720af2723b552bdf086bb10 |
| User & Date: | dan 2010-05-31 12:02:31 |
|
2010-05-31
| ||
| 12:15 | Add WALTRACE() macros to help with debugging and analysis. (check-in: 765c3318 user: drh tags: wal-incr-ckpt) | |
| 12:02 | Another minor fix to checkpoint on the WAL branch. (check-in: 853f1e3f user: dan tags: wal-incr-ckpt) | |
| 11:39 | Fix a bug in checkpoint introduced by [181ceb32ea]. (check-in: b499dbc8 user: dan tags: wal-incr-ckpt) | |
Changes to src/wal.c.
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 .... 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 .... 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 |
} /* This routine only runs while holding SQLITE_SHM_CHECKPOINT. No other ** thread is able to write to shared memory while this routine is ** running (or, indeed, while the WalIterator object exists). Hence, ** we can cast off the volatile qualifacation from shared memory */ assert( pWal->ckptLock || pWal->exclusiveMode ); aData = (u32*)pWal->pWiData; /* Allocate space for the WalIterator object */ iLast = pWal->hdr.mxFrame; nSegment = (iLast >> 8) + 1; nFinal = (iLast & 0x000000FF); nByte = sizeof(WalIterator) + (nSegment+1)*(sizeof(struct WalSegment)+256); ................................................................................ ** the wal and wal-index files. ** ** The EXCLUSIVE lock is not released before returning. */ rc = sqlite3OsLock(pWal->pDbFd, SQLITE_LOCK_EXCLUSIVE); if( rc==SQLITE_OK ){ pWal->exclusiveMode = 1; rc = walCheckpoint(pWal, sync_flags, nBuf, zBuf); if( rc==SQLITE_OK ){ isDelete = 1; } walIndexUnmap(pWal); } walIndexClose(pWal, isDelete); ................................................................................ memcpy(&h1, &aHdr[0], sizeof(h1)); sqlite3OsShmBarrier(pWal->pDbFd); memcpy(&h2, &aHdr[1], sizeof(h2)); if( memcmp(&h1, &h2, sizeof(h1))!=0 ){ return 1; /* Dirty read */ } if( h1.szPage==0 ){ return 1; /* Malformed header - probably all zeros */ } walChecksumBytes(1, (u8*)&h1, sizeof(h1)-sizeof(h1.aCksum), 0, aCksum); if( aCksum[0]!=h1.aCksum[0] || aCksum[1]!=h1.aCksum[1] ){ return 1; /* Checksum does not match */ } if( memcmp(&pWal->hdr, &h1, sizeof(WalIndexHdr)) ){ *pChanged = 1; |
| | > > |
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 .... 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 .... 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 |
} /* This routine only runs while holding SQLITE_SHM_CHECKPOINT. No other ** thread is able to write to shared memory while this routine is ** running (or, indeed, while the WalIterator object exists). Hence, ** we can cast off the volatile qualifacation from shared memory */ assert( pWal->ckptLock ); aData = (u32*)pWal->pWiData; /* Allocate space for the WalIterator object */ iLast = pWal->hdr.mxFrame; nSegment = (iLast >> 8) + 1; nFinal = (iLast & 0x000000FF); nByte = sizeof(WalIterator) + (nSegment+1)*(sizeof(struct WalSegment)+256); ................................................................................ ** the wal and wal-index files. ** ** The EXCLUSIVE lock is not released before returning. */ rc = sqlite3OsLock(pWal->pDbFd, SQLITE_LOCK_EXCLUSIVE); if( rc==SQLITE_OK ){ pWal->exclusiveMode = 1; rc = sqlite3WalCheckpoint(pWal, sync_flags, nBuf, zBuf); if( rc==SQLITE_OK ){ isDelete = 1; } walIndexUnmap(pWal); } walIndexClose(pWal, isDelete); ................................................................................ memcpy(&h1, &aHdr[0], sizeof(h1)); sqlite3OsShmBarrier(pWal->pDbFd); memcpy(&h2, &aHdr[1], sizeof(h2)); if( memcmp(&h1, &h2, sizeof(h1))!=0 ){ return 1; /* Dirty read */ } #if 0 if( h1.szPage==0 ){ return 1; /* Malformed header - probably all zeros */ } #endif walChecksumBytes(1, (u8*)&h1, sizeof(h1)-sizeof(h1.aCksum), 0, aCksum); if( aCksum[0]!=h1.aCksum[0] || aCksum[1]!=h1.aCksum[1] ){ return 1; /* Checksum does not match */ } if( memcmp(&pWal->hdr, &h1, sizeof(WalIndexHdr)) ){ *pChanged = 1; |