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Overview
| Comment: | Make sure WAL alway requests enough shared-memory space. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | wal-incr-ckpt |
| Files: | files | file ages | folders |
| SHA1: |
138f128317b6695530ca3fde7be4cdf2 |
| User & Date: | drh 2010-05-31 14:39:32 |
Context
|
2010-05-31
| ||
| 16:10 | Get the new xShmLock interface design working on os_win.c. (check-in: 149a7082 user: drh tags: wal-incr-ckpt) | |
| 14:39 | Make sure WAL alway requests enough shared-memory space. (check-in: 138f1283 user: drh tags: wal-incr-ckpt) | |
| 14:28 | Remove the tests that enable tracing based on the existance of the "vdbe_*" files when in SQLITE_DEBUG mode. (check-in: cdbb4e7c user: drh tags: wal-incr-ckpt) | |
Changes
Changes to src/wal.c.
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walUnlockShared(pWal, WAL_RECOVER_LOCK);
rc = WAL_RETRY;
}else if( rc==SQLITE_BUSY ){
rc = SQLITE_BUSY_RECOVERY;
}
}
}else{
rc = walIndexMap(pWal, pWal->hdr.mxFrame);
}
if( rc!=SQLITE_OK ){
return rc;
}
pHdr = (volatile WalIndexHdr*)pWal->pWiData;
pInfo = (volatile WalCkptInfo*)&pHdr[2];
................................................................................
}
pWal->writeLock = 1;
/* If another connection has written to the database file since the
** time the read transaction on this connection was started, then
** the write is disallowed.
*/
rc = walIndexMap(pWal, pWal->hdr.mxFrame);
if( rc ){
walUnlockExclusive(pWal, WAL_WRITE_LOCK, 1);
pWal->writeLock = 0;
return rc;
}
if( memcmp(&pWal->hdr, (void*)pWal->pWiData, sizeof(WalIndexHdr))!=0 ){
walUnlockExclusive(pWal, WAL_WRITE_LOCK, 1);
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walUnlockShared(pWal, WAL_RECOVER_LOCK);
rc = WAL_RETRY;
}else if( rc==SQLITE_BUSY ){
rc = SQLITE_BUSY_RECOVERY;
}
}
}else{
rc = walIndexMap(pWal, walMappingSize(pWal->hdr.mxFrame));
}
if( rc!=SQLITE_OK ){
return rc;
}
pHdr = (volatile WalIndexHdr*)pWal->pWiData;
pInfo = (volatile WalCkptInfo*)&pHdr[2];
................................................................................
}
pWal->writeLock = 1;
/* If another connection has written to the database file since the
** time the read transaction on this connection was started, then
** the write is disallowed.
*/
rc = walIndexMap(pWal, walMappingSize(pWal->hdr.mxFrame));
if( rc ){
walUnlockExclusive(pWal, WAL_WRITE_LOCK, 1);
pWal->writeLock = 0;
return rc;
}
if( memcmp(&pWal->hdr, (void*)pWal->pWiData, sizeof(WalIndexHdr))!=0 ){
walUnlockExclusive(pWal, WAL_WRITE_LOCK, 1);
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