資料庫的開啟模式：

在database.h中有一列舉定義，如下：

        dbConcurrentUpdate};

在dbDatabase建構函式中有相應的初始化引數，建構函式如下：

 dbDatabase(dbAccessType type = dbAllAccess,
               size_t dbInitSize = dbDefaultInitDatabaseSize,
               size_t dbExtensionQuantum = dbDefaultExtensionQuantum,
               size_t dbInitIndexSize = dbDefaultInitIndexSize,
               int nThreads = 1 
               // Do not specify the following parameter - them are used only for checking
               // that application and FastDB library were built with the 
               // same compiler options (-DNO_PTHREADS and -REPPLICATION_SUPPORT)
               // Mismached parameters should cause linker error
#ifdef NO_PTHREADS
               , dbThreadMode threadMode = dbNotUsePthreads
#endif
#ifdef REPLICATION_SUPPORT
               , dbReplicationMode replicationMode = dbReplicated
#endif
               );

如：dbDatabase db(dbDatabase::dbConcurrentRead);