28 lines
780 B
Rust
28 lines
780 B
Rust
use {
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c::sched_setscheduler,
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std::{
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env, mem,
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sync::atomic::{AtomicBool, Ordering::Relaxed},
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},
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uapi::c::{self, SCHED_RESET_ON_FORK, SCHED_RR, sched_param},
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};
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static DID_ELEVATE_SCHEDULER: AtomicBool = AtomicBool::new(false);
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pub const JAY_NO_REALTIME: &str = "JAY_NO_REALTIME";
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pub fn elevate_scheduler() {
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if env::var(JAY_NO_REALTIME).as_deref().unwrap_or_default() == "1" {
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return;
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}
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let mut param = unsafe { mem::zeroed::<sched_param>() };
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param.sched_priority = 1;
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let res = unsafe { sched_setscheduler(0, SCHED_RR | SCHED_RESET_ON_FORK, ¶m) };
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if res == 0 {
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DID_ELEVATE_SCHEDULER.store(true, Relaxed);
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}
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}
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pub fn did_elevate_scheduler() -> bool {
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DID_ELEVATE_SCHEDULER.load(Relaxed)
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}
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