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
72
73
74
75
76
77
78
79
80
81
82
83
84
85

// Copyright 2017 Lars Kroll. See the LICENSE
// file at the top-level directory of this distribution.
//
// Licensed under the MIT license
// <LICENSE or http://opensource.org/licenses/MIT>.
// This file may not be copied, modified, or distributed
// except according to those terms.
#![doc(html_root_url = "https://docs.rs/executors/0.5.0")]
#![allow(unused_parens)]

//! This crate provides a number of task executors all implementing the
//! [`Executor`](common/trait.Executor.html) trait.
//!
//! General examples can be found in the [`Executor`](common/trait.Executor.html) trait
//! documentation, and implementation specific examples with each implementation module.

#[macro_use]
extern crate log;

pub mod bichannel;
pub mod common;
#[cfg(feature = "cb-channel-exec")]
pub mod crossbeam_channel_pool;
#[cfg(feature = "workstealing-exec")]
pub mod crossbeam_workstealing_pool;
pub mod parker;
pub mod run_now;
#[cfg(feature = "threadpool-exec")]
pub mod threadpool_executor;
mod timeconstants;

use crate::common::ignore;
pub use crate::common::Executor;

//use bichannel::*;
use synchronoise::CountdownEvent;

#[cfg(test)]
pub(crate) mod tests {
    use super::*;
    use std::sync::Arc;
    use std::time::Duration;

    pub const N_DEPTH: usize = 32;
    pub const N_WIDTH: usize = 8;

    pub fn test_debug<E>(exec: &E, label: &str)
    where
        E: Executor + std::fmt::Debug,
    {
        println!("Debug output for {}: {:?}", label, exec);
    }

    pub fn test_defaults<E>(label: &str)
    where
        E: Executor + std::default::Default + 'static,
    {
        let pool = E::default();

        let latch = Arc::new(CountdownEvent::new(N_DEPTH * N_WIDTH));
        for _ in 0..N_WIDTH {
            let pool2 = pool.clone();
            let latch2 = latch.clone();
            pool.execute(move || {
                do_step(latch2, pool2, N_DEPTH);
            });
        }
        let res = latch.wait_timeout(Duration::from_secs(5));
        assert_eq!(res, 0);
        pool.shutdown()
            .unwrap_or_else(|e| error!("Error during pool shutdown {:?} at {}", e, label));
    }

    fn do_step<E>(latch: Arc<CountdownEvent>, pool: E, depth: usize)
    where
        E: Executor + 'static,
    {
        let new_depth = depth - 1;
        ignore(latch.decrement());
        if (new_depth > 0) {
            let pool2 = pool.clone();
            pool.execute(move || do_step(latch, pool2, new_depth))
        }
    }
}