#include <db.h>

u_int32_t
DB_TXN->set_timeout(DB_TXN *tid, db_timeout_t timeout, u_int32_t flags);  

The DB_TXN->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 DB_ENV->set_timeout() for more information.

The DB_TXN->set_timeout() method configures operations performed on the underlying transaction, not only operations performed using the specified DB_TXN handle.

The DB_TXN->set_timeout() method may be called at any time during the life of the application.

The DB_TXN->set_timeout() method returns a non-zero error value on failure and 0 on success.