boc 0.0.1

Behaviour-Oriented Concurrency
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
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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130

use crate::{AcquiredCown, Cown};

pub trait CownCollection {
    type Acquired<'a>;

    fn schedule_onto<F>(self, func: F)
    where
        F: for<'a> FnOnce(Self::Acquired<'a>) + Send + 'static;
}

pub fn when<C, F>(cowns: C, func: F)
where
    C: CownCollection,
    F: for<'a> FnOnce(C::Acquired<'a>) + Send + 'static,
{
    cowns.schedule_onto(func)
}

macro_rules! impl_collection_once {
    (
        $fnname:ident
        $fntname:ident
        <
        $($cname:ident $gty:ident),+
        >
    ) => {
        #[allow(unused_parens)]
        impl<$($gty: 'static),+> CownCollection for ($(&Cown<$gty>),+) {
            type Acquired<'a> = ($(AcquiredCown<'a, $gty>),+);

            fn schedule_onto<Func>(self, func: Func)
            where
                Func: for<'a> FnOnce(Self::Acquired<'a>) + Send + 'static,
            {
                use crate::when as mwhen;

                let ($($cname),+) = self;
                mwhen::$fnname($($cname),+ , |$($cname),+| func(($($cname),+)));
            }
        }
    };
}

impl_collection_once!(when1 Func1 <c1 A>);
impl_collection_once!(when2 Func2 <c1 A, c2 B>);
impl_collection_once!(when3 Func3 <c1 A, c2 B, c3 C>);
impl_collection_once!(when4 Func4 <c1 A, c2 B, c3 C, c4 D>);
impl_collection_once!(when5 Func5 <c1 A, c2 B, c3 C, c4 D, c5 E>);
impl_collection_once!(when6 Func6 <c1 A, c2 B, c3 C, c4 D, c5 E, c6 F>);
impl_collection_once!(when7 Func7 <c1 A, c2 B, c3 C, c4 D, c5 E, c6 F, c7 G>);
impl_collection_once!(when8 Func8 <c1 A, c2 B, c3 C, c4 D, c5 E, c6 F, c7 G, c8 H>);
impl_collection_once!(when9 Func9 <c1 A, c2 B, c3 C, c4 D, c5 E, c6 F, c7 G, c8 H, g9 I>);

// TODO: More?

#[cfg(test)]
mod tests {
    use std::sync::{
        atomic::{AtomicI16, Ordering},
        Arc,
    };

    use crate::with_leak_detector;

    use super::*;

    #[test]
    fn playing_around() {
        with_leak_detector(|| {
            let c1 = Cown::new(1);
            let c2 = Cown::new(3);
            let c5 = Cown::new(8);

            when((&c1, &c2, &c5), |(mut a, b, mut c)| {
                assert_eq!(*a, 1);
                assert_eq!(*b, 3);
                assert_eq!(*c, 8);

                *a = 10;
                *c = 12;
            });

            when((&c1, &c5), |(a, c)| {
                assert_eq!(*a, 10);
                assert_eq!(*c, 12);
            })
        });
    }

    #[test]
    fn lambda() {
        with_leak_detector(|| {
            let x = Arc::new(AtomicI16::new(10));
            let c1 = Cown::new(10);
            let c2 = Cown::new(20);
            let c3 = Cown::new(30);

            let x_ = x.clone();
            when((&c1, &c2), move |(a1, a2)| {
                assert_eq!(*a1, 10);
                assert_eq!(*a2, 20);

                assert_eq!(x_.swap(100, Ordering::Relaxed), 10);
            });

            let x_ = x.clone();
            when((&c2, &c3), move |(a2, a3)| {
                assert_eq!(*a2, 20);
                assert_eq!(*a3, 30);

                assert_eq!(x_.swap(1000, Ordering::Relaxed), 100);
            });

            let x_ = x.clone();
            when((&c3, &c1), move |(a3, a1)| {
                assert_eq!(*a3, 30);
                assert_eq!(*a1, 10);

                assert_eq!(x_.swap(10000, Ordering::Relaxed), 1000);
            });

            when((&c1, &c2, &c3), move |(a1, a2, a3)| {
                assert_eq!(*a1, 10);
                assert_eq!(*a2, 20);
                assert_eq!(*a3, 30);
                assert_eq!(x.load(Ordering::Relaxed), 10000);
            });
        })
    }
}