--- /dev/null
+#ifndef FIO_TIME_H
+#define FIO_TIME_H
+
+extern uint64_t utime_since(struct timeval *, struct timeval *);
+extern uint64_t utime_since_now(struct timeval *);
+extern uint64_t mtime_since(struct timeval *, struct timeval *);
+extern uint64_t mtime_since_now(struct timeval *);
+extern uint64_t time_since_now(struct timeval *);
+extern uint64_t mtime_since_genesis(void);
+extern uint64_t utime_since_genesis(void);
+extern void usec_spin(unsigned int);
+extern void usec_sleep(struct thread_data *, unsigned long);
+extern void fill_start_time(struct timeval *);
+extern void set_genesis_time(void);
+extern int ramp_time_over(struct thread_data *);
+extern int in_ramp_time(struct thread_data *);
+extern void fio_time_init(void);
+
+#endif