fast_time 0.1.24

An efficient low-precision timestamp source suitable for high-frequency querying
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

use std::time::Instant;

use windows::Win32::System::SystemInformation::GetTickCount64;

use crate::pal::windows::Bindings;

/// FFI bindings that target the real operating system that the build is targeting.
///
/// You would only use different bindings in PAL unit tests that need to use mock bindings.
/// Even then, whenever possible, unit tests should use real bindings for maximum realism.
#[derive(Debug, Default)]
pub(crate) struct BuildTargetBindings;

impl Bindings for BuildTargetBindings {
    #[inline]
    fn get_tick_count_64(&self) -> u64 {
        // SAFETY: No safety requirements.
        unsafe { GetTickCount64() }
    }

    #[inline]
    fn now(&self) -> Instant {
        Instant::now()
    }
}

#[cfg(test)]
#[cfg_attr(coverage_nightly, coverage(off))]
mod tests {
    use std::panic::{RefUnwindSafe, UnwindSafe};

    use super::*;

    static_assertions::assert_impl_all!(BuildTargetBindings: UnwindSafe, RefUnwindSafe);
}