#include <db.h>

int
log_compare(const DB_LSN *lsn0, const DB_LSN *lsn1);  

The log_compare() method allows the caller to compare two DB_LSN structures, returning 0 if they are equal, 1 if lsn0 is greater than lsn1, and -1 if lsn0 is less than lsn1.