[rustc.git] / src / libstd / sys / unix / time.rs

// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use cmp::Ordering;
use libc;
use time::Duration;
use core::hash::{Hash, Hasher};

pub use self::inner::{Instant, SystemTime, UNIX_EPOCH};
use convert::TryInto;

const NSEC_PER_SEC: u64 = 1_000_000_000;

#[derive(Copy, Clone)]
struct Timespec {
    t: libc::timespec,
}

impl Timespec {
    fn sub_timespec(&self, other: &Timespec) -> Result<Duration, Duration> {
        if self >= other {
            Ok(if self.t.tv_nsec >= other.t.tv_nsec {
                Duration::new((self.t.tv_sec - other.t.tv_sec) as u64,
                              (self.t.tv_nsec - other.t.tv_nsec) as u32)
            } else {
                Duration::new((self.t.tv_sec - 1 - other.t.tv_sec) as u64,
                              self.t.tv_nsec as u32 + (NSEC_PER_SEC as u32) -
                              other.t.tv_nsec as u32)
            })
        } else {
            match other.sub_timespec(self) {
                Ok(d) => Err(d),
                Err(d) => Ok(d),
            }
        }
    }

    fn add_duration(&self, other: &Duration) -> Timespec {
        let mut secs = other
            .as_secs()
            .try_into() // <- target type would be `libc::time_t`
            .ok()
            .and_then(|secs| self.t.tv_sec.checked_add(secs))
            .expect("overflow when adding duration to time");

        // Nano calculations can't overflow because nanos are <1B which fit
        // in a u32.
        let mut nsec = other.subsec_nanos() + self.t.tv_nsec as u32;
        if nsec >= NSEC_PER_SEC as u32 {
            nsec -= NSEC_PER_SEC as u32;
            secs = secs.checked_add(1).expect("overflow when adding \
                                               duration to time");
        }
        Timespec {
            t: libc::timespec {
                tv_sec: secs,
                tv_nsec: nsec as _,
            },
        }
    }

    fn sub_duration(&self, other: &Duration) -> Timespec {
        let mut secs = other
            .as_secs()
            .try_into() // <- target type would be `libc::time_t`
            .ok()
            .and_then(|secs| self.t.tv_sec.checked_sub(secs))
            .expect("overflow when subtracting duration from time");

        // Similar to above, nanos can't overflow.
        let mut nsec = self.t.tv_nsec as i32 - other.subsec_nanos() as i32;
        if nsec < 0 {
            nsec += NSEC_PER_SEC as i32;
            secs = secs.checked_sub(1).expect("overflow when subtracting \
                                               duration from time");
        }
        Timespec {
            t: libc::timespec {
                tv_sec: secs,
                tv_nsec: nsec as _,
            },
        }
    }
}

impl PartialEq for Timespec {
    fn eq(&self, other: &Timespec) -> bool {
        self.t.tv_sec == other.t.tv_sec && self.t.tv_nsec == other.t.tv_nsec
    }
}

impl Eq for Timespec {}

impl PartialOrd for Timespec {
    fn partial_cmp(&self, other: &Timespec) -> Option<Ordering> {
        Some(self.cmp(other))
    }
}

impl Ord for Timespec {
    fn cmp(&self, other: &Timespec) -> Ordering {
        let me = (self.t.tv_sec, self.t.tv_nsec);
        let other = (other.t.tv_sec, other.t.tv_nsec);
        me.cmp(&other)
    }
}

impl Hash for Timespec {
    fn hash<H : Hasher>(&self, state: &mut H) {
        self.t.tv_sec.hash(state);
        self.t.tv_nsec.hash(state);
    }
}

#[cfg(any(target_os = "macos", target_os = "ios"))]
mod inner {
    use fmt;
    use libc;
    use sync::Once;
    use sys::cvt;
    use sys_common::mul_div_u64;
    use time::Duration;

    use super::NSEC_PER_SEC;
    use super::Timespec;

    #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
    pub struct Instant {
        t: u64
    }

    #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
    pub struct SystemTime {
        t: Timespec,
    }

    pub const UNIX_EPOCH: SystemTime = SystemTime {
        t: Timespec {
            t: libc::timespec {
                tv_sec: 0,
                tv_nsec: 0,
            },
        },
    };

    impl Instant {
        pub fn now() -> Instant {
            Instant { t: unsafe { libc::mach_absolute_time() } }
        }

        pub fn sub_instant(&self, other: &Instant) -> Duration {
            let info = info();
            let diff = self.t.checked_sub(other.t)
                           .expect("second instant is later than self");
            let nanos = mul_div_u64(diff, info.numer as u64, info.denom as u64);
            Duration::new(nanos / NSEC_PER_SEC, (nanos % NSEC_PER_SEC) as u32)
        }

        pub fn add_duration(&self, other: &Duration) -> Instant {
            Instant {
                t: self.t.checked_add(dur2intervals(other))
                       .expect("overflow when adding duration to instant"),
            }
        }

        pub fn sub_duration(&self, other: &Duration) -> Instant {
            Instant {
                t: self.t.checked_sub(dur2intervals(other))
                       .expect("overflow when subtracting duration from instant"),
            }
        }
    }

    impl SystemTime {
        pub fn now() -> SystemTime {
            use ptr;

            let mut s = libc::timeval {
                tv_sec: 0,
                tv_usec: 0,
            };
            cvt(unsafe {
                libc::gettimeofday(&mut s, ptr::null_mut())
            }).unwrap();
            return SystemTime::from(s)
        }

        pub fn sub_time(&self, other: &SystemTime)
                        -> Result<Duration, Duration> {
            self.t.sub_timespec(&other.t)
        }

        pub fn add_duration(&self, other: &Duration) -> SystemTime {
            SystemTime { t: self.t.add_duration(other) }
        }

        pub fn sub_duration(&self, other: &Duration) -> SystemTime {
            SystemTime { t: self.t.sub_duration(other) }
        }
    }

    impl From<libc::timeval> for SystemTime {
        fn from(t: libc::timeval) -> SystemTime {
            SystemTime::from(libc::timespec {
                tv_sec: t.tv_sec,
                tv_nsec: (t.tv_usec * 1000) as libc::c_long,
            })
        }
    }

    impl From<libc::timespec> for SystemTime {
        fn from(t: libc::timespec) -> SystemTime {
            SystemTime { t: Timespec { t: t } }
        }
    }

    impl fmt::Debug for SystemTime {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            f.debug_struct("SystemTime")
             .field("tv_sec", &self.t.t.tv_sec)
             .field("tv_nsec", &self.t.t.tv_nsec)
             .finish()
        }
    }

    fn dur2intervals(dur: &Duration) -> u64 {
        let info = info();
        let nanos = dur.as_secs().checked_mul(NSEC_PER_SEC).and_then(|nanos| {
            nanos.checked_add(dur.subsec_nanos() as u64)
        }).expect("overflow converting duration to nanoseconds");
        mul_div_u64(nanos, info.denom as u64, info.numer as u64)
    }

    fn info() -> &'static libc::mach_timebase_info {
        static mut INFO: libc::mach_timebase_info = libc::mach_timebase_info {
            numer: 0,
            denom: 0,
        };
        static ONCE: Once = Once::new();

        unsafe {
            ONCE.call_once(|| {
                libc::mach_timebase_info(&mut INFO);
            });
            &INFO
        }
    }
}

#[cfg(not(any(target_os = "macos", target_os = "ios")))]
mod inner {
    use fmt;
    use libc;
    use sys::cvt;
    use time::Duration;

    use super::Timespec;

    #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
    pub struct Instant {
        t: Timespec,
    }

    #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
    pub struct SystemTime {
        t: Timespec,
    }

    pub const UNIX_EPOCH: SystemTime = SystemTime {
        t: Timespec {
            t: libc::timespec {
                tv_sec: 0,
                tv_nsec: 0,
            },
        },
    };

    impl Instant {
        pub fn now() -> Instant {
            Instant { t: now(libc::CLOCK_MONOTONIC) }
        }

        pub fn sub_instant(&self, other: &Instant) -> Duration {
            self.t.sub_timespec(&other.t).unwrap_or_else(|_| {
                panic!("specified instant was later than self")
            })
        }

        pub fn add_duration(&self, other: &Duration) -> Instant {
            Instant { t: self.t.add_duration(other) }
        }

        pub fn sub_duration(&self, other: &Duration) -> Instant {
            Instant { t: self.t.sub_duration(other) }
        }
    }

    impl fmt::Debug for Instant {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            f.debug_struct("Instant")
             .field("tv_sec", &self.t.t.tv_sec)
             .field("tv_nsec", &self.t.t.tv_nsec)
             .finish()
        }
    }

    impl SystemTime {
        pub fn now() -> SystemTime {
            SystemTime { t: now(libc::CLOCK_REALTIME) }
        }

        pub fn sub_time(&self, other: &SystemTime)
                        -> Result<Duration, Duration> {
            self.t.sub_timespec(&other.t)
        }

        pub fn add_duration(&self, other: &Duration) -> SystemTime {
            SystemTime { t: self.t.add_duration(other) }
        }

        pub fn sub_duration(&self, other: &Duration) -> SystemTime {
            SystemTime { t: self.t.sub_duration(other) }
        }
    }

    impl From<libc::timespec> for SystemTime {
        fn from(t: libc::timespec) -> SystemTime {
            SystemTime { t: Timespec { t: t } }
        }
    }

    impl fmt::Debug for SystemTime {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            f.debug_struct("SystemTime")
             .field("tv_sec", &self.t.t.tv_sec)
             .field("tv_nsec", &self.t.t.tv_nsec)
             .finish()
        }
    }

    #[cfg(not(target_os = "dragonfly"))]
    pub type clock_t = libc::c_int;
    #[cfg(target_os = "dragonfly")]
    pub type clock_t = libc::c_ulong;

    fn now(clock: clock_t) -> Timespec {
        let mut t = Timespec {
            t: libc::timespec {
                tv_sec: 0,
                tv_nsec: 0,
            }
        };
        cvt(unsafe {
            libc::clock_gettime(clock, &mut t.t)
        }).unwrap();
        t
    }
}
Commit	Line	Data
85aaf69f SL	1	// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
	2	// file at the top-level directory of this distribution and at
	3	// http://rust-lang.org/COPYRIGHT.
	4	//
	5	// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
	6	// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
	7	// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
	8	// option. This file may not be copied, modified, or distributed
	9	// except according to those terms.
	10
a7813a04	11	use cmp::Ordering;
a7813a04	12	use libc;
5bcae85e	13	use time::Duration;
ff7c6d11	14	use core::hash::{Hash, Hasher};
a7813a04	15
92a42be0	16	pub use self::inner::{Instant, SystemTime, UNIX_EPOCH};
ea8adc8c	17	use convert::TryInto;
85aaf69f	18
d9579d0f AL	19	const NSEC_PER_SEC: u64 = 1_000_000_000;
d9579d0f AL	20
a7813a04 XL	21	#[derive(Copy, Clone)]
	22	struct Timespec {
	23	t: libc::timespec,
	24	}
	25
	26	impl Timespec {
	27	fn sub_timespec(&self, other: &Timespec) -> Result<Duration, Duration> {
	28	if self >= other {
	29	Ok(if self.t.tv_nsec >= other.t.tv_nsec {
	30	Duration::new((self.t.tv_sec - other.t.tv_sec) as u64,
	31	(self.t.tv_nsec - other.t.tv_nsec) as u32)
	32	} else {
	33	Duration::new((self.t.tv_sec - 1 - other.t.tv_sec) as u64,
	34	self.t.tv_nsec as u32 + (NSEC_PER_SEC as u32) -
	35	other.t.tv_nsec as u32)
	36	})
	37	} else {
	38	match other.sub_timespec(self) {
	39	Ok(d) => Err(d),
	40	Err(d) => Ok(d),
	41	}
	42	}
	43	}
	44
	45	fn add_duration(&self, other: &Duration) -> Timespec {
ea8adc8c XL	46	let mut secs = other
	47	.as_secs()
	48	.try_into() // <- target type would be `libc::time_t`
	49	.ok()
	50	.and_then(\|secs\| self.t.tv_sec.checked_add(secs))
	51	.expect("overflow when adding duration to time");
a7813a04 XL	52
	53	// Nano calculations can't overflow because nanos are <1B which fit
	54	// in a u32.
	55	let mut nsec = other.subsec_nanos() + self.t.tv_nsec as u32;
	56	if nsec >= NSEC_PER_SEC as u32 {
	57	nsec -= NSEC_PER_SEC as u32;
	58	secs = secs.checked_add(1).expect("overflow when adding \
	59	duration to time");
	60	}
	61	Timespec {
	62	t: libc::timespec {
ea8adc8c	63	tv_sec: secs,
abe05a73	64	tv_nsec: nsec as _,
a7813a04 XL	65	},
	66	}
	67	}
	68
	69	fn sub_duration(&self, other: &Duration) -> Timespec {
ea8adc8c XL	70	let mut secs = other
	71	.as_secs()
	72	.try_into() // <- target type would be `libc::time_t`
	73	.ok()
	74	.and_then(\|secs\| self.t.tv_sec.checked_sub(secs))
	75	.expect("overflow when subtracting duration from time");
a7813a04 XL	76
	77	// Similar to above, nanos can't overflow.
	78	let mut nsec = self.t.tv_nsec as i32 - other.subsec_nanos() as i32;
	79	if nsec < 0 {
	80	nsec += NSEC_PER_SEC as i32;
	81	secs = secs.checked_sub(1).expect("overflow when subtracting \
	82	duration from time");
	83	}
	84	Timespec {
	85	t: libc::timespec {
ea8adc8c	86	tv_sec: secs,
abe05a73	87	tv_nsec: nsec as _,
a7813a04 XL	88	},
	89	}
	90	}
	91	}
	92
	93	impl PartialEq for Timespec {
	94	fn eq(&self, other: &Timespec) -> bool {
	95	self.t.tv_sec == other.t.tv_sec && self.t.tv_nsec == other.t.tv_nsec
	96	}
	97	}
	98
	99	impl Eq for Timespec {}
	100
	101	impl PartialOrd for Timespec {
	102	fn partial_cmp(&self, other: &Timespec) -> Option<Ordering> {
	103	Some(self.cmp(other))
	104	}
	105	}
	106
	107	impl Ord for Timespec {
	108	fn cmp(&self, other: &Timespec) -> Ordering {
	109	let me = (self.t.tv_sec, self.t.tv_nsec);
	110	let other = (other.t.tv_sec, other.t.tv_nsec);
	111	me.cmp(&other)
	112	}
	113	}
	114
ff7c6d11 XL	115	impl Hash for Timespec {
	116	fn hash<H : Hasher>(&self, state: &mut H) {
	117	self.t.tv_sec.hash(state);
	118	self.t.tv_nsec.hash(state);
	119	}
	120	}
	121
85aaf69f SL	122	#[cfg(any(target_os = "macos", target_os = "ios"))]
85aaf69f SL	123	mod inner {
92a42be0	124	use fmt;
85aaf69f	125	use libc;
92a42be0 SL	126	use sync::Once;
	127	use sys::cvt;
	128	use sys_common::mul_div_u64;
	129	use time::Duration;
85aaf69f	130
a7813a04 XL	131	use super::NSEC_PER_SEC;
a7813a04 XL	132	use super::Timespec;
92a42be0	133
ff7c6d11	134	#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
92a42be0	135	pub struct Instant {
85aaf69f SL	136	t: u64
	137	}
	138
ff7c6d11	139	#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
92a42be0	140	pub struct SystemTime {
a7813a04	141	t: Timespec,
85aaf69f SL	142	}
85aaf69f SL	143
92a42be0	144	pub const UNIX_EPOCH: SystemTime = SystemTime {
a7813a04 XL	145	t: Timespec {
	146	t: libc::timespec {
	147	tv_sec: 0,
	148	tv_nsec: 0,
	149	},
92a42be0 SL	150	},
	151	};
	152
	153	impl Instant {
	154	pub fn now() -> Instant {
	155	Instant { t: unsafe { libc::mach_absolute_time() } }
	156	}
	157
	158	pub fn sub_instant(&self, other: &Instant) -> Duration {
	159	let info = info();
	160	let diff = self.t.checked_sub(other.t)
	161	.expect("second instant is later than self");
	162	let nanos = mul_div_u64(diff, info.numer as u64, info.denom as u64);
	163	Duration::new(nanos / NSEC_PER_SEC, (nanos % NSEC_PER_SEC) as u32)
	164	}
	165
	166	pub fn add_duration(&self, other: &Duration) -> Instant {
	167	Instant {
	168	t: self.t.checked_add(dur2intervals(other))
	169	.expect("overflow when adding duration to instant"),
	170	}
	171	}
	172
	173	pub fn sub_duration(&self, other: &Duration) -> Instant {
	174	Instant {
	175	t: self.t.checked_sub(dur2intervals(other))
7cac9316	176	.expect("overflow when subtracting duration from instant"),
85aaf69f SL	177	}
85aaf69f SL	178	}
85aaf69f SL	179	}
85aaf69f SL	180
92a42be0 SL	181	impl SystemTime {
92a42be0 SL	182	pub fn now() -> SystemTime {
5bcae85e SL	183	use ptr;
5bcae85e SL	184
a7813a04 XL	185	let mut s = libc::timeval {
	186	tv_sec: 0,
	187	tv_usec: 0,
92a42be0 SL	188	};
92a42be0 SL	189	cvt(unsafe {
5bcae85e	190	libc::gettimeofday(&mut s, ptr::null_mut())
92a42be0	191	}).unwrap();
a7813a04	192	return SystemTime::from(s)
92a42be0 SL	193	}
	194
	195	pub fn sub_time(&self, other: &SystemTime)
	196	-> Result<Duration, Duration> {
a7813a04	197	self.t.sub_timespec(&other.t)
92a42be0 SL	198	}
	199
	200	pub fn add_duration(&self, other: &Duration) -> SystemTime {
a7813a04	201	SystemTime { t: self.t.add_duration(other) }
92a42be0 SL	202	}
	203
	204	pub fn sub_duration(&self, other: &Duration) -> SystemTime {
a7813a04	205	SystemTime { t: self.t.sub_duration(other) }
92a42be0 SL	206	}
	207	}
	208
7453a54e SL	209	impl From<libc::timeval> for SystemTime {
7453a54e SL	210	fn from(t: libc::timeval) -> SystemTime {
a7813a04 XL	211	SystemTime::from(libc::timespec {
	212	tv_sec: t.tv_sec,
	213	tv_nsec: (t.tv_usec * 1000) as libc::c_long,
	214	})
92a42be0 SL	215	}
	216	}
	217
a7813a04 XL	218	impl From<libc::timespec> for SystemTime {
	219	fn from(t: libc::timespec) -> SystemTime {
	220	SystemTime { t: Timespec { t: t } }
92a42be0 SL	221	}
	222	}
	223
	224	impl fmt::Debug for SystemTime {
	225	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
	226	f.debug_struct("SystemTime")
a7813a04 XL	227	.field("tv_sec", &self.t.t.tv_sec)
a7813a04 XL	228	.field("tv_nsec", &self.t.t.tv_nsec)
92a42be0 SL	229	.finish()
	230	}
	231	}
	232
	233	fn dur2intervals(dur: &Duration) -> u64 {
	234	let info = info();
	235	let nanos = dur.as_secs().checked_mul(NSEC_PER_SEC).and_then(\|nanos\| {
	236	nanos.checked_add(dur.subsec_nanos() as u64)
	237	}).expect("overflow converting duration to nanoseconds");
	238	mul_div_u64(nanos, info.denom as u64, info.numer as u64)
	239	}
	240
85aaf69f SL	241	fn info() -> &'static libc::mach_timebase_info {
	242	static mut INFO: libc::mach_timebase_info = libc::mach_timebase_info {
	243	numer: 0,
	244	denom: 0,
	245	};
62682a34	246	static ONCE: Once = Once::new();
85aaf69f SL	247
	248	unsafe {
	249	ONCE.call_once(\|\| {
92a42be0	250	libc::mach_timebase_info(&mut INFO);
85aaf69f SL	251	});
	252	&INFO
	253	}
	254	}
85aaf69f SL	255	}
	256
	257	#[cfg(not(any(target_os = "macos", target_os = "ios")))]
	258	mod inner {
92a42be0	259	use fmt;
85aaf69f	260	use libc;
92a42be0 SL	261	use sys::cvt;
92a42be0 SL	262	use time::Duration;
85aaf69f	263
a7813a04	264	use super::Timespec;
85aaf69f	265
ff7c6d11	266	#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
92a42be0 SL	267	pub struct Instant {
	268	t: Timespec,
	269	}
	270
ff7c6d11	271	#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
92a42be0 SL	272	pub struct SystemTime {
	273	t: Timespec,
	274	}
	275
	276	pub const UNIX_EPOCH: SystemTime = SystemTime {
	277	t: Timespec {
	278	t: libc::timespec {
	279	tv_sec: 0,
	280	tv_nsec: 0,
	281	},
	282	},
	283	};
85aaf69f	284
92a42be0 SL	285	impl Instant {
92a42be0 SL	286	pub fn now() -> Instant {
a7813a04	287	Instant { t: now(libc::CLOCK_MONOTONIC) }
92a42be0 SL	288	}
	289
	290	pub fn sub_instant(&self, other: &Instant) -> Duration {
	291	self.t.sub_timespec(&other.t).unwrap_or_else(\|_\| {
94b46f34	292	panic!("specified instant was later than self")
92a42be0 SL	293	})
	294	}
	295
	296	pub fn add_duration(&self, other: &Duration) -> Instant {
	297	Instant { t: self.t.add_duration(other) }
	298	}
	299
	300	pub fn sub_duration(&self, other: &Duration) -> Instant {
	301	Instant { t: self.t.sub_duration(other) }
	302	}
	303	}
	304
	305	impl fmt::Debug for Instant {
	306	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
	307	f.debug_struct("Instant")
	308	.field("tv_sec", &self.t.t.tv_sec)
	309	.field("tv_nsec", &self.t.t.tv_nsec)
	310	.finish()
	311	}
	312	}
	313
	314	impl SystemTime {
	315	pub fn now() -> SystemTime {
a7813a04	316	SystemTime { t: now(libc::CLOCK_REALTIME) }
92a42be0 SL	317	}
	318
	319	pub fn sub_time(&self, other: &SystemTime)
	320	-> Result<Duration, Duration> {
	321	self.t.sub_timespec(&other.t)
	322	}
	323
	324	pub fn add_duration(&self, other: &Duration) -> SystemTime {
	325	SystemTime { t: self.t.add_duration(other) }
	326	}
	327
	328	pub fn sub_duration(&self, other: &Duration) -> SystemTime {
	329	SystemTime { t: self.t.sub_duration(other) }
	330	}
	331	}
b039eaaf	332
7453a54e SL	333	impl From<libc::timespec> for SystemTime {
	334	fn from(t: libc::timespec) -> SystemTime {
	335	SystemTime { t: Timespec { t: t } }
	336	}
	337	}
	338
92a42be0 SL	339	impl fmt::Debug for SystemTime {
	340	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
	341	f.debug_struct("SystemTime")
	342	.field("tv_sec", &self.t.t.tv_sec)
	343	.field("tv_nsec", &self.t.t.tv_nsec)
	344	.finish()
	345	}
85aaf69f SL	346	}
85aaf69f SL	347
54a0048b SL	348	#[cfg(not(target_os = "dragonfly"))]
	349	pub type clock_t = libc::c_int;
	350	#[cfg(target_os = "dragonfly")]
	351	pub type clock_t = libc::c_ulong;
	352
a7813a04 XL	353	fn now(clock: clock_t) -> Timespec {
	354	let mut t = Timespec {
	355	t: libc::timespec {
	356	tv_sec: 0,
	357	tv_nsec: 0,
92a42be0	358	}
a7813a04 XL	359	};
	360	cvt(unsafe {
	361	libc::clock_gettime(clock, &mut t.t)
	362	}).unwrap();
	363	t
85aaf69f SL	364	}
85aaf69f SL	365	}