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| author | Vivian Lim <[email protected]> | 2021-02-06 22:11:59 -0800 |
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| committer | Vivian Lim <[email protected]> | 2021-02-06 22:11:59 -0800 |
| commit | 64423f0e34cc4a7d78c15b345b3b8f58243d8286 (patch) | |
| tree | cc20e2e7f0fc35abf470e20e61d3d48f0d954f3b /ctr-std/src/sys/horizon/time.rs | |
| parent | Support libctru 2.0 (diff) | |
| download | ctru-rs-64423f0e34cc4a7d78c15b345b3b8f58243d8286.tar.xz ctru-rs-64423f0e34cc4a7d78c15b345b3b8f58243d8286.zip | |
Delete ctr-std to use my fork of the rust repo instead
Diffstat (limited to 'ctr-std/src/sys/horizon/time.rs')
| -rw-r--r-- | ctr-std/src/sys/horizon/time.rs | 285 |
1 files changed, 0 insertions, 285 deletions
diff --git a/ctr-std/src/sys/horizon/time.rs b/ctr-std/src/sys/horizon/time.rs deleted file mode 100644 index aa66cf1..0000000 --- a/ctr-std/src/sys/horizon/time.rs +++ /dev/null @@ -1,285 +0,0 @@ -// 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}; - -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 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"); - - // 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 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"); - - // 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 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) - } -} - -impl Hash for Timespec { - fn hash<H : Hasher>(&self, state: &mut H) { - self.t.tv_sec.hash(state); - self.t.tv_nsec.hash(state); - } -} - -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; - - use libctru; - - #[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: ctr_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"), - } - } - } - - // The initial system tick after which all Instants occur - static mut TICK: u64 = 0; - - // A source of monotonic time based on ticks of the 3DS CPU. Returns the - // number of system ticks elapsed since an arbitrary point in the past - fn ctr_absolute_time() -> u64 { - let first_tick = get_first_tick(); - let current_tick = get_system_tick(); - current_tick - first_tick - } - - // The first time this function is called, it generates and returns the - // initial system tick used to create Instants - // - // subsequent calls to this function return the previously generated - // tick value - fn get_first_tick() -> u64 { - static ONCE: Once = Once::new(); - unsafe { - ONCE.call_once(|| { - TICK = get_system_tick(); - }); - TICK - } - } - - // Gets the current system tick - #[inline] - fn get_system_tick() -> u64 { - unsafe { libctru::svcGetSystemTick() } - } - - // A struct representing the clock speed of the 3DS - struct CtrClockInfo { - numer: u32, - denom: u32, - } - - // Initializes the CtrClockInfo struct - // - // Note that svcGetSystemTick always runs at 268MHz (268,111,856Hz), even - // on a New 3DS running in 804MHz mode - // - // See https://www.3dbrew.org/wiki/Hardware#Common_hardware - fn info() -> &'static CtrClockInfo { - static INFO: CtrClockInfo = CtrClockInfo { - numer: 1_000_000_000, - denom: 268_111_856, - }; - &INFO - } - - 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) - } - - 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() - } - } -}
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