#include <db.h> u_int32_t DB_TXN->id(DB_TXN *tid);
The DB_TXN->id()
method returns the unique transaction id associated
with the specified transaction. Locking calls made on behalf of this
transaction should use the value returned from DB_TXN->id()
as the
locker parameter to the
DB_ENV->lock_get()
or
DB_ENV->lock_vec()
calls.