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Merged
jeffcharles merged 1 commit into from
Oct 30, 2026
Merged

Switch to using libc library rather than handcoded structs #79

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35 changes: 8 additions & 27 deletions src/ticker/signal/timer.rs
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Original file line number Diff line number Diff line change
@@ -1,26 +1,7 @@
use std::os::raw::c_int;
use std::ptr::null_mut;
use std::time::{Duration, Instant};

#[repr(C)]
#[derive(Clone)]
struct Timeval {
pub tv_sec: i64,
pub tv_usec: i64,
}

#[repr(C)]
#[derive(Clone)]
struct Itimerval {
pub it_interval: Timeval,
pub it_value: Timeval,
}

extern "C" {
fn setitimer(which: c_int, new_value: *mut Itimerval, old_value: *mut Itimerval) -> c_int;
}

const ITIMER_PROF: c_int = 2;
use libc::{itimerval, setitimer, timeval, ITIMER_PROF};

pub struct Timer {
pub start_instant: Instant,
Expand All @@ -30,16 +11,16 @@ impl Timer {
pub fn new(frequency: u32) -> Timer {
let time = 1f64 / f64::from(frequency);
let duration = Duration::from_secs_f64(time);
let it_interval = Timeval {
let it_interval = timeval {
tv_sec: duration.as_secs().try_into().unwrap(),
tv_usec: duration.subsec_micros().into(),
tv_usec: duration.subsec_micros() as _,
};
let it_value = it_interval.clone();
let it_value = it_interval;

unsafe {
setitimer(
ITIMER_PROF,
&mut Itimerval {
&itimerval {
it_interval,
it_value,
},
Expand All @@ -59,15 +40,15 @@ impl Timer {

impl Drop for Timer {
fn drop(&mut self) {
let it_interval = Timeval {
let it_interval = timeval {
tv_sec: 0,
tv_usec: 0,
};
let it_value = it_interval.clone();
let it_value = it_interval;
unsafe {
setitimer(
ITIMER_PROF,
&mut Itimerval {
&itimerval {
it_interval,
it_value,
},
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