How to use the mk.windows.symbolstore.Dumper.jobs_condition.notify_all function in mk

def JobFinished(self, file_key):
        """Decrements the number of submitted jobs for the specified key file,
        defined as the original file we processed; once the count is back to 0,
        remove the entry from our record."""
        with Dumper.jobs_condition:
            self.jobs_record[file_key] -= 1

            if self.jobs_record[file_key] == 0:
                del self.jobs_record[file_key]

            Dumper.jobs_condition.notify_all()

def JobStarted(self, file_key):
        """Increments the number of submitted jobs for the specified key file,
        defined as the original file we processed; note that a single key file
        can generate up to 1 + len(self.archs) jobs in the Mac case."""
        with Dumper.jobs_condition:
            self.jobs_record[file_key] += 1
            Dumper.jobs_condition.notify_all()