394 } async = { 0,0,0,0,0,1,0,0 };  variable
546   if( async.pQueueLast ){  in addAsyncWrite()
547     assert( async.pQueueFirst );  in addAsyncWrite()
548     async.pQueueLast->pNext = pWrite;  in addAsyncWrite()
550     async.pQueueFirst = pWrite;  in addAsyncWrite()
552   async.pQueueLast = pWrite;  in addAsyncWrite()
557     async.nFile--;  in addAsyncWrite()
576   if( async.nFile==0 ){  in incrOpenFileCount()
577     async.ioError = SQLITE_OK;  in incrOpenFileCount()
579   async.nFile++;  in incrOpenFileCount()
595   if( op!=ASYNC_CLOSE && async.ioError ){  in addNewAsyncWrite()
596     return async.ioError;  in addNewAsyncWrite()
680   if( async.ioError!=SQLITE_OK ){  in asyncRead()
681     rc = async.ioError;  in asyncRead()
702     for(pWrite=async.pQueueFirst; pWrite; pWrite = pWrite->pNext){  in asyncRead()
784     for(pWrite=async.pQueueFirst; pWrite; pWrite = pWrite->pNext){  in asyncFileSize()
850   AsyncLock *p = async.pLock;  in findLock()
981       for(pp=&async.pLock; *pp!=pLock; pp=&((*pp)->pNext));  in unlinkAsyncFile()
1103         if( async.bLockFiles && (flags&SQLITE_OPEN_MAIN_DB) ){  in asyncOpen()
1115           pLock->pNext = async.pLock;  in asyncOpen()
1116           async.pLock = pLock;  in asyncOpen()
1204     for(p=async.pQueueFirst; p; p = p->pNext){  in asyncAccess()
1348   while( async.eHalt!=SQLITEASYNC_HALT_NOW ){  in asyncWriterThread()
1355     while( (p = async.pQueueFirst)==0 ){  in asyncWriterThread()
1356       if( async.eHalt!=SQLITEASYNC_HALT_NEVER ){  in asyncWriterThread()
1387     if( async.ioError!=SQLITE_OK && p->op!=ASYNC_CLOSE ){  in asyncWriterThread()
1452         async.pQueueFirst = p->pNext;  in asyncWriterThread()
1494         assert( async.pQueueFirst==p );  in asyncWriterThread()
1495         for(pIter=async.pQueueFirst->pNext; pIter; pIter=pIter->pNext){  in asyncWriterThread()
1540     if( p==async.pQueueLast ){  in asyncWriterThread()
1541       async.pQueueLast = 0;  in asyncWriterThread()
1545       async.pQueueFirst = p->pNext;  in asyncWriterThread()
1569       async.ioError = rc;  in asyncWriterThread()
1572     if( async.ioError && !async.pQueueFirst ){  in asyncWriterThread()
1574       if( 0==async.pLock ){  in asyncWriterThread()
1575         async.ioError = SQLITE_OK;  in asyncWriterThread()
1583     if( !async.pQueueFirst || !async.ioError ){  in asyncWriterThread()
1586       if( async.ioDelay>0 ){  in asyncWriterThread()
1587         pVfs->xSleep(pVfs, async.ioDelay*1000);  in asyncWriterThread()
1652       async.eHalt = eWhen;  in sqlite3async_control()
1665       async.ioDelay = iDelay;  in sqlite3async_control()
1672       if( async.nFile || async.pQueueFirst ){  in sqlite3async_control()
1677       async.bLockFiles = bLock;  in sqlite3async_control()
1684       *peWhen = async.eHalt;  in sqlite3async_control()
1689       *piDelay = async.ioDelay;  in sqlite3async_control()
1694       *piDelay = async.bLockFiles;  in sqlite3async_control()