#include <db_cxx.h> u_int32_t DbTxn::set_timeout(db_timeout_t timeout, u_int32_t flags);
         The DbTxn::set_timeout() method sets timeout values for locks or
         transactions for the specified transaction.
    
         Timeouts are checked whenever a thread of control blocks on a lock or
         when deadlock detection is performed.  In the case of
         DB_SET_LOCK_TIMEOUT, the timeout is for any single lock request. In
         the case of DB_SET_TXN_TIMEOUT, the timeout is for the life of the
         transaction.  As timeouts are only checked when the lock request first
         blocks or when deadlock detection is performed, the accuracy of the
         timeout depends on how often deadlock detection is performed.
    
Timeout values may be specified for the database environment as a whole. Also, the database environment must enable the locking subsystem before timeout values can be specified. See DbEnv::set_timeout() for more information.
         The DbTxn::set_timeout() method configures operations performed on
         the underlying transaction, not only operations performed using the
         specified DbTxn  handle.
    
         The DbTxn::set_timeout() method may be called at any time during the
         life of the application.
    
         The DbTxn::set_timeout() 
            
            
                method either returns a non-zero error value or throws an
                exception that encapsulates a non-zero error value on
                failure, and returns 0 on success.
            
        
    
The timeout parameter is specified as an unsigned 32-bit number of microseconds, limiting the maximum timeout to roughly 71 minutes. A value of 0 disables timeouts for the transaction.
                         The DbTxn::set_timeout() 
            
            
                method may fail and throw a DbException 
                exception, encapsulating one of the following non-zero errors, or return one
                of the following non-zero errors: