struct thread_data;
extern uint64_t utime_since(const struct timeval *,const struct timeval *);
extern uint64_t utime_since_now(const struct timeval *);
extern uint64_t mtime_since(const struct timeval *, const struct timeval *);
extern uint64_t mtime_since_now(const struct timeval *);
extern uint64_t time_since_now(const struct timeval *);
struct thread_data;
extern uint64_t utime_since(const struct timeval *,const struct timeval *);
extern uint64_t utime_since_now(const struct timeval *);
extern uint64_t mtime_since(const struct timeval *, const struct timeval *);
extern uint64_t mtime_since_now(const struct timeval *);
extern uint64_t time_since_now(const struct timeval *);