519   u8 writeLock;              /* True if in a write transaction */  member
660         pWal->writeLock, (void volatile **)&pWal->apWiData[iPage]  in walIndexPageRealloc()
664          || (pWal->writeLock==0 && iPage==0) );  in walIndexPageRealloc()
799   assert( pWal->writeLock );  in walIndexWriteHdr()
1077   assert( pWal->writeLock );  in walCleanupHash()
1237   assert( pWal->writeLock );  in walIndexRecover()
1901         pWal->writeLock = 1;  in sqlite3WalWriteLock()
1905   }else if( pWal->writeLock ){  in sqlite3WalWriteLock()
1907     pWal->writeLock = 0;  in sqlite3WalWriteLock()
2181     assert( pWal->writeLock );  in walCheckpoint()
2409       assert( pWal->writeLock==0 );  in walIndexReadHdr()
2422   assert( page0!=0 || pWal->writeLock==0 );  in walIndexReadHdr()
2441       int bWriteLock = pWal->writeLock;  in walIndexReadHdr()
2443         pWal->writeLock = 1;  in walIndexReadHdr()
2456           pWal->writeLock = 0;  in walIndexReadHdr()
3287   if( pWal->writeLock ){  in sqlite3WalBeginWriteTransaction()
3296   assert( pWal->writeLock==0 && pWal->iReCksum==0 );  in sqlite3WalBeginWriteTransaction()
3309   pWal->writeLock = 1;  in sqlite3WalBeginWriteTransaction()
3317     pWal->writeLock = 0;  in sqlite3WalBeginWriteTransaction()
3329   if( pWal->writeLock ){  in sqlite3WalEndWriteTransaction()
3331     pWal->writeLock = 0;  in sqlite3WalEndWriteTransaction()
3352   if( ALWAYS(pWal->writeLock) ){  in sqlite3WalUndo()
3391   assert( pWal->writeLock );  in sqlite3WalSavepoint()
3407   assert( pWal->writeLock );  in sqlite3WalSavepointUndo()
3624   assert( pWal->writeLock );  in sqlite3WalFrames()
3860   assert( pWal->writeLock==0 );  in sqlite3WalCheckpoint()
3900         pWal->writeLock = 1;  in sqlite3WalCheckpoint()
4002   assert( pWal->writeLock==0 );  in sqlite3WalExclusiveMode()
4056   assert( pWal->readLock>=0 && pWal->writeLock==0 );  in sqlite3WalSnapshotGet()