UltraLite Static C++ User's Guide
  Synchronization Parameters Reference
    Synchronization parameters

disable_concurrency synchronization parameter

Function 

Disallow database access from other threads during synchronization.

Default 

By default, data access is available. Data access is read-write during the download phase, and read-only otherwise.

Usage 

Set the parameter as follows:

ul_synch_info info;
// ...
info.checkpoint_store = ul_false ;

See also 

Threading in UltraLite applications