comm-central/third_party/rust/parking_lot/src/util.rs

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// Copyright 2016 Amanieu d'Antras
//
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// http://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 std::time::{Duration, Instant};
// Option::unchecked_unwrap
pub trait UncheckedOptionExt<T> {
unsafe fn unchecked_unwrap(self) -> T;
}
impl<T> UncheckedOptionExt<T> for Option<T> {
#[inline]
unsafe fn unchecked_unwrap(self) -> T {
match self {
Some(x) => x,
None => unreachable(),
}
}
}
// hint::unreachable_unchecked() in release mode
#[inline]
unsafe fn unreachable() -> ! {
if cfg!(debug_assertions) {
unreachable!();
} else {
core::hint::unreachable_unchecked()
}
}
#[inline]
pub fn to_deadline(timeout: Duration) -> Option<Instant> {
Instant::now().checked_add(timeout)
}