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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71


use crate::Source;
use crate::Tracker;

pub struct Timer<T: Tracker, S: Source> {
    tracker: T,
    source: S,
    last: Option<u64>,
}

impl<T: Tracker, S: Source> Timer<T, S> {
    /// Create a new Timer.
    pub fn new() -> Self {
        Self {
            tracker: T::default(),
            source: S::default(),
            last: None,
        }
    }

    /// Start timing. Panics if the timer is already running.
    pub fn start(&mut self) {
        assert!(self.last.is_none(), "cannot start running timer");
        self.last = Some(self.source.get_time());
    }

    /// Stop timing. Panics if the timer is not currently running.
    pub fn stop(&mut self) {
        let time = self.source.get_time() - self.last.take().expect("cannot stop paused timer");
        self.tracker.record(time);
    }

    /// Returns whether the timer is currently running.
    pub fn is_running(&self) -> bool {
        self.last.is_some()
    }

    pub fn get_stats(&self) -> T::Statistics {
        self.tracker.get_stats(self.last.map(|l| self.source.get_time() - l))
    }

    /// Returns the elapsed time in nanoseconds.
    pub fn num_nanoseconds(&self) -> u64 {
        self.tracker.get(self.last.map(|l| self.source.get_time() - l))
    }

    /// Returns the elapsed time in microseconds.
    pub fn num_microseconds(&self) -> u64 {
        self.num_nanoseconds() / 1000
    }

    /// Return the elapsed time in milliseconds.
    pub fn num_milliseconds(&self) -> u64 {
        self.num_nanoseconds() / 1000_000
    }

    /// Returns the elapsed time in seconds.
    pub fn num_seconds(&self) -> u64 {
        self.num_nanoseconds() / 1000_000_000
    }

    /// Returns the elapsed time in minutes.
    pub fn num_minutes(&self) -> u64 {
        self.num_nanoseconds() / 60_000_000_000
    }

    /// Returns the elapsed time in hours.
    pub fn num_hours(&self) -> u64 {
        self.num_nanoseconds() / 3600_000_000_000
    }
}