#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.