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pub use self::inner::{Instant, SystemTime, UNIX_EPOCH};
const NSEC_PER_SEC: u64 = 1_000_000_000;
#[cfg(any(target_os = "macos", target_os = "ios"))]
mod inner {
use cmp::Ordering;
use fmt;
use libc;
use super::NSEC_PER_SEC;
use sync::Once;
use sys::cvt;
use sys_common::mul_div_u64;
use time::Duration;
const USEC_PER_SEC: u64 = NSEC_PER_SEC / 1000;
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug)]
pub struct Instant {
t: u64
}
#[derive(Copy, Clone)]
pub struct SystemTime {
t: libc::timeval,
}
pub const UNIX_EPOCH: SystemTime = SystemTime {
t: libc::timeval {
tv_sec: 0,
tv_usec: 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 adding duration to instant"),
}
}
}
impl SystemTime {
pub fn now() -> SystemTime {
let mut s = SystemTime {
t: libc::timeval {
tv_sec: 0,
tv_usec: 0,
},
};
cvt(unsafe {
libc::gettimeofday(&mut s.t, 0 as *mut _)
}).unwrap();
return s
}
pub fn sub_time(&self, other: &SystemTime)
-> Result<Duration, Duration> {
if self >= other {
Ok(if self.t.tv_usec >= other.t.tv_usec {
Duration::new((self.t.tv_sec - other.t.tv_sec) as u64,
((self.t.tv_usec -
other.t.tv_usec) as u32) * 1000)
} else {
Duration::new((self.t.tv_sec - 1 - other.t.tv_sec) as u64,
(self.t.tv_usec as u32 + (USEC_PER_SEC as u32) -
other.t.tv_usec as u32) * 1000)
})
} else {
match other.sub_time(self) {
Ok(d) => Err(d),
Err(d) => Ok(d),
}
}
}
pub fn add_duration(&self, other: &Duration) -> SystemTime {
let secs = (self.t.tv_sec as i64).checked_add(other.as_secs() as i64);
let mut secs = secs.expect("overflow when adding duration to time");
let mut usec = (other.subsec_nanos() / 1000) + self.t.tv_usec as u32;
if usec >= USEC_PER_SEC as u32 {
usec -= USEC_PER_SEC as u32;
secs = secs.checked_add(1).expect("overflow when adding \
duration to time");
}
SystemTime {
t: libc::timeval {
tv_sec: secs as libc::time_t,
tv_usec: usec as libc::suseconds_t,
},
}
}
pub fn sub_duration(&self, other: &Duration) -> SystemTime {
let secs = (self.t.tv_sec as i64).checked_sub(other.as_secs() as i64);
let mut secs = secs.expect("overflow when subtracting duration \
from time");
let mut usec = self.t.tv_usec as i32 -
(other.subsec_nanos() / 1000) as i32;
if usec < 0 {
usec += USEC_PER_SEC as i32;
secs = secs.checked_sub(1).expect("overflow when subtracting \
duration from time");
}
SystemTime {
t: libc::timeval {
tv_sec: secs as libc::time_t,
tv_usec: usec as libc::suseconds_t,
},
}
}
}
impl From<libc::timeval> for SystemTime {
fn from(t: libc::timeval) -> SystemTime {
SystemTime { t: t }
}
}
impl PartialEq for SystemTime {
fn eq(&self, other: &SystemTime) -> bool {
self.t.tv_sec == other.t.tv_sec && self.t.tv_usec == other.t.tv_usec
}
}
impl Eq for SystemTime {}
impl PartialOrd for SystemTime {
fn partial_cmp(&self, other: &SystemTime) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for SystemTime {
fn cmp(&self, other: &SystemTime) -> Ordering {
let me = (self.t.tv_sec, self.t.tv_usec);
let other = (other.t.tv_sec, other.t.tv_usec);
me.cmp(&other)
}
}
impl fmt::Debug for SystemTime {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("SystemTime")
.field("tv_sec", &self.t.tv_sec)
.field("tv_usec", &self.t.tv_usec)
.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 cmp::Ordering;
use fmt;
use libc;
use super::NSEC_PER_SEC;
use sys::cvt;
use time::Duration;
#[derive(Copy, Clone)]
struct Timespec {
t: libc::timespec,
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord)]
pub struct Instant {
t: Timespec,
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord)]
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: Timespec::now(libc::CLOCK_MONOTONIC) }
}
pub fn sub_instant(&self, other: &Instant) -> Duration {
self.t.sub_timespec(&other.t).unwrap_or_else(|_| {
panic!("other was less than the current instant")
})
}
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: Timespec::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;
impl Timespec {
pub 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
}
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 secs = (self.t.tv_sec as i64).checked_add(other.as_secs() as i64);
let mut secs = secs.expect("overflow when adding duration to time");
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 as libc::time_t,
tv_nsec: nsec as libc::c_long,
},
}
}
fn sub_duration(&self, other: &Duration) -> Timespec {
let secs = (self.t.tv_sec as i64).checked_sub(other.as_secs() as i64);
let mut secs = secs.expect("overflow when subtracting duration \
from time");
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 as libc::time_t,
tv_nsec: nsec as libc::c_long,
},
}
}
}
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)
}
}
}