coordinode-lsm-tree 4.4.0

A K.I.S.S. implementation of log-structured merge trees (LSM-trees/LSMTs) — CoordiNode fork
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

// Copyright (c) 2024-present, fjall-rs
// This source code is licensed under both the Apache 2.0 and MIT License
// (found in the LICENSE-* files in the repository)

/// Gets the unix timestamp as a duration
pub fn unix_timestamp() -> std::time::Duration {
    #[cfg(test)]
    #[allow(clippy::significant_drop_in_scrutinee, clippy::expect_used)]
    {
        if let Some(cell) = NOW_OVERRIDE.get()
            && let Some(override_val) = *cell.lock().expect("lock is poisoned")
        {
            return override_val;
        }
    }

    let now = std::time::SystemTime::now();

    #[expect(clippy::expect_used, reason = "trivial")]
    now.duration_since(std::time::SystemTime::UNIX_EPOCH)
        .expect("time went backwards")
}

#[cfg(test)]
use std::sync::{Mutex, OnceLock};

#[cfg(test)]
static NOW_OVERRIDE: OnceLock<Mutex<Option<std::time::Duration>>> = OnceLock::new();

#[cfg(test)]
#[allow(clippy::expect_used)]
pub fn set_unix_timestamp_for_test(value: Option<std::time::Duration>) {
    let cell = NOW_OVERRIDE.get_or_init(|| Mutex::new(None));
    *cell.lock().expect("lock is poisoned") = value;
}