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Overview
| Comment: | Fix a problem in the previous commit. Both unixShm.lockState and unixShm.readLock should be set to READ when downgrading from a WRITE to a READ lock |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | wal |
| Files: | files | file ages | folders |
| SHA1: |
90119fecbce06c8db82194dfd9d5045b |
| User & Date: | dan 2010-04-30 16:41:54 |
Context
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2010-04-30
| ||
| 16:48 | In the debugging output for SHM-LOCK in os_unix.c, use symbolic names for the lock states rather than raw numbers. (check-in: 2afc33de user: drh tags: wal) | |
| 16:41 | Fix a problem in the previous commit. Both unixShm.lockState and unixShm.readLock should be set to READ when downgrading from a WRITE to a READ lock (check-in: 90119fec user: dan tags: wal) | |
| 16:38 | Fix a bug whereby upgrading from a READ_FULL to a WRITE lock, and then back to a read lock was dropping all WAL locks. (check-in: 55f5af5e user: dan tags: wal) | |
Changes
Changes to src/os_unix.c.
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unixShmUnlock(pFile, p, UNIX_SHM_B);
p->lockState = p->readLock = SQLITE_SHM_READ;
}
}
}else if( p->lockState==SQLITE_SHM_WRITE ){
rc = unixShmSharedLock(pFile, p, UNIX_SHM_A);
unixShmUnlock(pFile, p, UNIX_SHM_C|UNIX_SHM_D);
p->lockState = SQLITE_SHM_READ;
}else{
assert( p->lockState==SQLITE_SHM_RECOVER );
unixShmUnlock(pFile, p, UNIX_SHM_MUTEX);
sqlite3_mutex_leave(pFile->mutexRecov);
p->lockState = p->readLock;
rc = SQLITE_OK;
}
|
| |
5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 |
unixShmUnlock(pFile, p, UNIX_SHM_B);
p->lockState = p->readLock = SQLITE_SHM_READ;
}
}
}else if( p->lockState==SQLITE_SHM_WRITE ){
rc = unixShmSharedLock(pFile, p, UNIX_SHM_A);
unixShmUnlock(pFile, p, UNIX_SHM_C|UNIX_SHM_D);
p->lockState = p->readLock = SQLITE_SHM_READ;
}else{
assert( p->lockState==SQLITE_SHM_RECOVER );
unixShmUnlock(pFile, p, UNIX_SHM_MUTEX);
sqlite3_mutex_leave(pFile->mutexRecov);
p->lockState = p->readLock;
rc = SQLITE_OK;
}
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