#include <db.h> int DB_ENV->mutex_get_tas_spins(DB_ENV *dbenv, u_int32_t *tas_spinsp);
         The DB_ENV->mutex_get_tas_spins() method returns the test-and-set
         spin count. This value may be configured using the
         DB_ENV->mutex_set_tas_spins()
         method.
    
         The DB_ENV->mutex_get_tas_spins() method may be called at any time
         during the life of the application.
    
         The DB_ENV->mutex_get_tas_spins() 
            
                  method returns a non-zero error value on failure and 0 on success.