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use crate::sys::time::TimeSpec;
#[cfg(any(
target_os = "freebsd",
target_os = "dragonfly",
target_os = "linux",
target_os = "android",
target_os = "emscripten",
))]
#[cfg(feature = "process")]
use crate::unistd::Pid;
use crate::{Errno, Result};
use libc::{self, clockid_t};
use std::mem::MaybeUninit;
/// Clock identifier
///
/// Newtype pattern around `clockid_t` (which is just alias). It prevents bugs caused by
/// accidentally passing wrong value.
#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct ClockId(clockid_t);
impl ClockId {
/// Creates `ClockId` from raw `clockid_t`
pub const fn from_raw(clk_id: clockid_t) -> Self {
ClockId(clk_id)
}
feature! {
#![feature = "process"]
/// Returns `ClockId` of a `pid` CPU-time clock
#[cfg(any(
target_os = "freebsd",
target_os = "dragonfly",
target_os = "linux",
target_os = "android",
target_os = "emscripten",
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub fn pid_cpu_clock_id(pid: Pid) -> Result<Self> {
clock_getcpuclockid(pid)
}
}
/// Returns resolution of the clock id
#[cfg(not(target_os = "redox"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub fn res(self) -> Result<TimeSpec> {
clock_getres(self)
}
/// Returns the current time on the clock id
pub fn now(self) -> Result<TimeSpec> {
clock_gettime(self)
}
/// Sets time to `timespec` on the clock id
#[cfg(not(any(
target_os = "macos",
target_os = "ios",
target_os = "redox",
target_os = "hermit",
)))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub fn set_time(self, timespec: TimeSpec) -> Result<()> {
clock_settime(self, timespec)
}
/// Gets the raw `clockid_t` wrapped by `self`
pub const fn as_raw(self) -> clockid_t {
self.0
}
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "linux"
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_BOOTTIME: ClockId = ClockId(libc::CLOCK_BOOTTIME);
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "linux"
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_BOOTTIME_ALARM: ClockId =
ClockId(libc::CLOCK_BOOTTIME_ALARM);
pub const CLOCK_MONOTONIC: ClockId = ClockId(libc::CLOCK_MONOTONIC);
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "linux"
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_MONOTONIC_COARSE: ClockId =
ClockId(libc::CLOCK_MONOTONIC_COARSE);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_MONOTONIC_FAST: ClockId =
ClockId(libc::CLOCK_MONOTONIC_FAST);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_MONOTONIC_PRECISE: ClockId =
ClockId(libc::CLOCK_MONOTONIC_PRECISE);
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "linux"
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_MONOTONIC_RAW: ClockId = ClockId(libc::CLOCK_MONOTONIC_RAW);
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "macos",
target_os = "ios",
target_os = "freebsd",
target_os = "dragonfly",
target_os = "redox",
target_os = "linux"
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_PROCESS_CPUTIME_ID: ClockId =
ClockId(libc::CLOCK_PROCESS_CPUTIME_ID);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_PROF: ClockId = ClockId(libc::CLOCK_PROF);
pub const CLOCK_REALTIME: ClockId = ClockId(libc::CLOCK_REALTIME);
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "linux"
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_REALTIME_ALARM: ClockId =
ClockId(libc::CLOCK_REALTIME_ALARM);
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "linux"
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_REALTIME_COARSE: ClockId =
ClockId(libc::CLOCK_REALTIME_COARSE);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_REALTIME_FAST: ClockId = ClockId(libc::CLOCK_REALTIME_FAST);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_REALTIME_PRECISE: ClockId =
ClockId(libc::CLOCK_REALTIME_PRECISE);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_SECOND: ClockId = ClockId(libc::CLOCK_SECOND);
#[cfg(any(
target_os = "emscripten",
target_os = "fuchsia",
all(target_os = "linux", target_env = "musl")
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_SGI_CYCLE: ClockId = ClockId(libc::CLOCK_SGI_CYCLE);
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "linux"
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_TAI: ClockId = ClockId(libc::CLOCK_TAI);
#[cfg(any(
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "ios",
target_os = "macos",
target_os = "freebsd",
target_os = "dragonfly",
target_os = "linux"
))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_THREAD_CPUTIME_ID: ClockId =
ClockId(libc::CLOCK_THREAD_CPUTIME_ID);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_UPTIME: ClockId = ClockId(libc::CLOCK_UPTIME);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_UPTIME_FAST: ClockId = ClockId(libc::CLOCK_UPTIME_FAST);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_UPTIME_PRECISE: ClockId =
ClockId(libc::CLOCK_UPTIME_PRECISE);
#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub const CLOCK_VIRTUAL: ClockId = ClockId(libc::CLOCK_VIRTUAL);
}
impl From<ClockId> for clockid_t {
fn from(clock_id: ClockId) -> Self {
clock_id.as_raw()
}
}
impl From<clockid_t> for ClockId {
fn from(clk_id: clockid_t) -> Self {
ClockId::from_raw(clk_id)
}
}
impl std::fmt::Display for ClockId {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
std::fmt::Display::fmt(&self.0, f)
}
}
/// Get the resolution of the specified clock, (see
/// [clock_getres(2)](https://pubs.opengroup.org/onlinepubs/7908799/xsh/clock_getres.html)).
#[cfg(not(target_os = "redox"))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub fn clock_getres(clock_id: ClockId) -> Result<TimeSpec> {
let mut c_time: MaybeUninit<libc::timespec> = MaybeUninit::uninit();
let ret =
unsafe { libc::clock_getres(clock_id.as_raw(), c_time.as_mut_ptr()) };
Errno::result(ret)?;
let res = unsafe { c_time.assume_init() };
Ok(TimeSpec::from(res))
}
/// Get the time of the specified clock, (see
/// [clock_gettime(2)](https://pubs.opengroup.org/onlinepubs/7908799/xsh/clock_gettime.html)).
pub fn clock_gettime(clock_id: ClockId) -> Result<TimeSpec> {
let mut c_time: MaybeUninit<libc::timespec> = MaybeUninit::uninit();
let ret =
unsafe { libc::clock_gettime(clock_id.as_raw(), c_time.as_mut_ptr()) };
Errno::result(ret)?;
let res = unsafe { c_time.assume_init() };
Ok(TimeSpec::from(res))
}
/// Set the time of the specified clock, (see
/// [clock_settime(2)](https://pubs.opengroup.org/onlinepubs/7908799/xsh/clock_settime.html)).
#[cfg(not(any(
target_os = "macos",
target_os = "ios",
target_os = "redox",
target_os = "hermit",
)))]
#[cfg_attr(docsrs, doc(cfg(all())))]
pub fn clock_settime(clock_id: ClockId, timespec: TimeSpec) -> Result<()> {
let ret =
unsafe { libc::clock_settime(clock_id.as_raw(), timespec.as_ref()) };
Errno::result(ret).map(drop)
}
/// Get the clock id of the specified process id, (see
/// [clock_getcpuclockid(3)](https://pubs.opengroup.org/onlinepubs/009695399/functions/clock_getcpuclockid.html)).
#[cfg(any(
target_os = "freebsd",
target_os = "dragonfly",
target_os = "linux",
target_os = "android",
target_os = "emscripten",
))]
#[cfg(feature = "process")]
#[cfg_attr(docsrs, doc(cfg(feature = "process")))]
pub fn clock_getcpuclockid(pid: Pid) -> Result<ClockId> {
let mut clk_id: MaybeUninit<libc::clockid_t> = MaybeUninit::uninit();
let ret =
unsafe { libc::clock_getcpuclockid(pid.into(), clk_id.as_mut_ptr()) };
if ret == 0 {
let res = unsafe { clk_id.assume_init() };
Ok(ClockId::from(res))
} else {
Err(Errno::from_i32(ret))
}
}
|
