fBlock           49693 ext/sqlite3/libsqlite/sqlite3.c static int walLockExclusive(Wal *pWal, int lockIdx, int n, int fBlock){
fBlock           49696 ext/sqlite3/libsqlite/sqlite3.c   if( fBlock ) sqlite3OsFileControl(pWal->pDbFd, SQLITE_FCNTL_WAL_BLOCK, 0);