+#ifndef _TIMEUTIL_H
+#define _TIMEUTIL_H 1
+
+#include <sys/time.h>
+
+double tdiff(const timeval& a, const timeval& b);
+bool less_than(const timeval &a, const timeval &b);
+timeval subtract_timeval_saturate(const timeval &a, const timeval &b);
+timeval offset_timeval_seconds(const timeval &a, double s);
+
+#endif // !defined(_TIMEUTIL_H)