+
+void
+ms_subtract_diff(struct timeval *start, int *ms)
+{
+ struct timeval diff, finish;
+
+ gettimeofday(&finish, NULL);
+ timersub(&finish, start, &diff);
+ *ms -= (diff.tv_sec * 1000) + (diff.tv_usec / 1000);
+}
+
+void
+ms_to_timeval(struct timeval *tv, int ms)
+{
+ if (ms < 0)
+ ms = 0;
+ tv->tv_sec = ms / 1000;
+ tv->tv_usec = (ms % 1000) * 1000;
+}
+