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//!Constants and structures from time classes //! //! This includes include/uapi/linux/time.h, //include/linux/time.h, and /include/linux/time64.h ///A structure that contains the number of seconds and nanoseconds since an epoch. /// ///If in doubt, assume we're talking about the UNIX epoch. #[repr(C)] #[derive(Debug, Clone, Copy)] pub struct timespec { ///The number of seconds contained in this timespec pub tv_sec: ::time_t, ///The number of nanoseconds contained in this timespec pub tv_nsec: ::c_long } impl timespec { ///Creates a new timespec with both values defaulting to zero pub fn new() -> timespec { timespec { tv_sec: 0, tv_nsec: 0 } } ///Creates a new timespec from the specified number of seconds pub fn from_seconds(seconds: ::time_t) -> timespec { timespec { tv_sec: seconds, tv_nsec: 0 } } ///Clears this timespec, setting each value to zero pub fn clear(&mut self) { self.tv_sec = 0; self.tv_nsec = 0; } } ///A structure that contains the number of seconds and microseconds since an epoch. /// ///If in doubt, assume we're talking about the UNIX epoch. #[repr(C)] #[derive(Debug, Clone, Copy)] pub struct timeval { ///The number of seconds contained in this timeval pub tv_sec: ::time_t, ///The number of microseconds contained in this timeval pub tv_usec: ::suseconds_t } impl timeval { ///Creates a new timeval with both values defaulting to zero pub fn new() -> timeval { timeval { tv_sec: 0, tv_usec: 0 } } ///Creates a new timeval from the specified number of seconds pub fn from_seconds(seconds: ::time_t) -> timeval { timeval { tv_sec: seconds, tv_usec: 0 } } ///Clears this timeval, setting each value to zero pub fn clear(&mut self) { self.tv_sec = 0; self.tv_usec = 0; } } ///A structure containing information on the time-based location of a timezone /// ///Please note that this does not include the name or country code, only the minutes west of Greenwich and the type of DST correction #[repr(C)] #[derive(Debug, Clone, Copy)] pub struct timezone { ///The number of minutes west of Greenwich pub tz_minuteswest: ::c_int, ///The type of Daylight Savings Time correction pub tz_dsttime: ::c_int } //Names of the interval timers ///An interval timer that decrements in real time /// ///On expiration, a SIGALRM is delivered pub const ITIMER_REAL: ::c_int = 0; ///An interval timer that decrements only when the process is executing. /// ///On expiration, a SIGVTALRM is delivered pub const ITIMER_VIRTUAL: ::c_int = 1; ///Decrements both while the process is executing and while the system is executing on behalf of the process /// ///This is usually used to profile kernel-space and user-space concurrently. /// ///If coupled with ITIMER_VIRTUAL, you can separate the two values - What is left when ITIMER_VIRTUAL's value is removed is kernel time pub const ITIMER_PROF: ::c_int = 2; ///An interval timer based on a `timespec` #[repr(C)] #[derive(Debug, Clone, Copy)] pub struct itimerspec { ///The period of time this timer should run for (Need to verify) pub it_interval: timespec, ///The amount of time left until expiration (Need to verify) pub it_value: timespec } ///An interval timer based on a `timeval` #[repr(C)] #[derive(Debug, Clone, Copy)] pub struct itimerval { ///The period of time this timer should run for (Need to verify) pub it_interval: timeval, ///The amount of time left until expiration (Need to verify) pub it_value: timeval } ///A system-wide clock that measures time from the "real world" /// ///This clock **is** affected by discontinuous jumps in system time, NTP, and user changes pub const CLOCK_REALTIME: ::clockid_t = 0; ///A clock that measures monotonic time since an unspecified starting point /// ///Unless you manage to break your system, this unspecified point is usually when your computer powers on. /// ///This is not affected by user changes, but is by `adjtime` and NTP. pub const CLOCK_MONOTONIC: ::clockid_t = 1; ///A high-resolution per-process timer from the processor. pub const CLOCK_PROCESS_CPUTIME_ID: ::clockid_t = 2; ///A (high-resolution?) thread-specific timer from the processor pub const CLOCK_THREAD_CPUTIME_ID: ::clockid_t = 3; ///A hardware-based version of `CLOCK_MONOTONIC` that is not subject to changes pub const CLOCK_MONOTONIC_RAW: ::clockid_t = 4; ///A faster but less precise version of `CLOCK_REALTIME`, measuring time in the "real world" pub const CLOCK_REALTIME_COARSE: ::clockid_t = 5; ///A faster but less precise version of `CLOCK_MONOTONIC`, measuring time since an unspecified starting point pub const CLOCK_MONOTONIC_COARSE: ::clockid_t = 6; ///Identical to `CLOCK_MONOTONIC`, but includes any time that the system is suspended. pub const CLOCK_BOOTIME: ::clockid_t = 7; ///Identical to `CLOCK_REALTIME`, but timers exposed via this will wake the system if suspended pub const CLOCK_REALTIME_ALARM: ::clockid_t = 8; ///Identical to `CLOCK_BOOTIME`, but timers exposed via this will wake the system if suspended pub const CLOCK_BOOTTIME_ALARM: ::clockid_t = 9; ///A clock used for SGI systems. Need to investigate pub const CLOCK_SGI_CYCLE: ::clockid_t = 10; ///A clock that shows International Atomic Time pub const CLOCK_TAI: ::clockid_t = 11; ///The maximum clock ID that the system is allowed to have pub const MAX_CLOCKS: ::clockid_t = 16; //Resolves to c_int. Please let me know if this should be c_int on it's own ///A mask for supported clocks /// ///Needs to be investigated pub const CLOCKS_MASK: ::clockid_t = CLOCK_REALTIME | CLOCK_MONOTONIC; ///A shorthand variant of CLOCK_MONOTONIC. /// ///This isn't used in the kernel. Is it left over from an old change that was reverted? pub const CLOCKS_MONO: ::clockid_t = CLOCK_MONOTONIC; ///A flag indicating time is absolute pub const TIMER_ABSTIME: ::c_int = 0x01; ///The type used for 64-bit time pub type time64_t = i64; ///The number of milliseconds in a second pub const MSEC_PER_SEC: ::c_long = 1000; ///The number of microseconds in a millisecond pub const USEC_PER_MSEC: ::c_long = 1000; ///The number of nanoseconds in a microsecond pub const NSEC_PER_USEC: ::c_long = 1000; ///The number of nanoseconds in a millisecond pub const NSEC_PER_MSEC: ::c_long = 1000000; ///The number of microseconds in a second pub const USEC_PER_SEC: ::c_long = 1000000; ///The number of nanoseconds in a second pub const NSEC_PER_SEC: ::c_long = 1000000000; ///The number of femtoseconds in a second pub const FSEC_PER_SEC: ::c_longlong = 1000000000000000; ///The maximum value of a time64_t //pub const TIME64_MAX: ::c_longlong = ((1u64 << 63) as i64); ///The maximum value of a ktime_t pub const KTIME_MAX: ::c_longlong = 9_223_372_036_854_775_807; ///The maximum number of seconds in a ktime_t pub const KTIME_SEC_MAX: ::c_longlong = 9_223_372_036; #[cfg(test)] mod tests { use super::*; #[test] fn test_per_sec_accuracy() { assert_eq!(NSEC_PER_MSEC, NSEC_PER_USEC * USEC_PER_MSEC); assert_eq!(NSEC_PER_SEC, NSEC_PER_MSEC * MSEC_PER_SEC); } #[test] fn test_timeval_utility_functions() { let mut val: timeval = timeval::new(); assert_eq!(0, val.tv_sec); val = timeval::from_seconds(100); assert_eq!(100, val.tv_sec); val.clear(); assert_eq!(0, val.tv_sec); } #[test] fn test_timespec_utility_functions() { let mut spec: timespec = timespec::new(); assert_eq!(0, spec.tv_sec); spec = timespec::from_seconds(164); assert_eq!(164, spec.tv_sec); spec.clear(); assert_eq!(0, spec.tv_sec); } }