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Add comment about futex_wait timeout.

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Mara Bos 2022-04-01 11:10:58 +02:00
parent c9ae3fe68f
commit c49887da27
1 changed files with 2 additions and 0 deletions
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2
library/std/src/sys/unix/futex.rs
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@ -14,6 +14,8 @@ pub fn futex_wait(futex: &AtomicI32, expected: i32, timeout: Option<Duration>) -
use crate::sync::atomic::Ordering::Relaxed;
// Calculate the timeout as an absolute timespec.
//
// Overflows are rounded up to an infinite timeout (None).
let timespec =
timeout.and_then(|d| Some(Timespec::now(libc::CLOCK_MONOTONIC).checked_add_duration(&d)?));