sark 0.9.0

Simple Asynchronous Rust webKit - Server
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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154

use std::cell::{Cell, OnceCell};
use std::pin::Pin;
use std::time::{Duration, Instant};

use dope::manifold::TypedToken;
use dope::manifold::env::Env;
use dope::manifold::listener::{Application, Listener};
use dope::manifold::timer;
pub use dope::manifold::timer::Ticket;
use dope::runtime::Idle;
use dope::{DriverContext, DriverRef, Event};
use dope_fiber::TimerExt as _;
use dope_fiber::Waker;

pub const SARK_TIMER_ID: u8 = 3;

pub const DEFAULT_HEAD_TIMEOUT: Duration = Duration::from_secs(10);

pub struct Timer<'d> {
    inner: OnceCell<timer::Timer<'d, SARK_TIMER_ID>>,
    capacity: usize,
    head_timeout: Cell<Duration>,
}

impl<'d> Timer<'d> {
    pub fn with_capacity(capacity: usize) -> Self {
        Self {
            inner: OnceCell::new(),
            capacity,
            head_timeout: Cell::new(DEFAULT_HEAD_TIMEOUT),
        }
    }

    fn inner(&self) -> &timer::Timer<'d, SARK_TIMER_ID> {
        self.inner
            .get()
            .expect("sark timer used before it was bound to a driver")
    }

    pub(crate) fn bind(&self, driver: DriverRef<'d>) {
        assert!(
            self.inner
                .set(timer::Timer::with_capacity(self.capacity, driver))
                .is_ok(),
            "sark timer bound more than once"
        );
    }

    pub fn set_head_timeout(&self, d: Duration) {
        self.head_timeout.set(d);
    }

    pub fn head_timeout(&self) -> Duration {
        self.head_timeout.get()
    }

    pub fn sleep(&self, d: Duration) -> impl dope_fiber::Fiber<'d, Output = ()> + '_ {
        self.inner().sleep(d)
    }

    pub fn arm(&self, deadline: Instant, wake: Waker<'d>) -> Option<Ticket> {
        self.inner().try_arm(deadline, wake.completion())
    }

    pub fn cancel(&self, ticket: Ticket) {
        self.inner().cancel(ticket);
    }

    pub fn is_fired(&self, ticket: Ticket) -> bool {
        self.inner().is_fired(ticket)
    }

    pub fn tick(&self, now: Instant) {
        self.inner().expire(now);
    }

    pub fn idle(&self) -> Idle {
        Idle::Park(self.inner().earliest())
    }
}

pub trait TimerHost<'d> {
    fn timer(&self) -> &Timer<'d>;
}

#[pin_project::pin_project]
pub struct TimedListener<'d, const ID: u8, P, E>
where
    P: Application<'d> + TimerHost<'d>,
    E: Env<Wire = P::Wire>,
{
    #[pin]
    pub inner: Listener<'d, ID, P, E>,
}

impl<'d, const ID: u8, P, E> TimedListener<'d, ID, P, E>
where
    P: Application<'d> + TimerHost<'d>,
    E: Env<Wire = P::Wire>,
{
    pub fn new(inner: Listener<'d, ID, P, E>, driver: DriverRef<'d>) -> Self {
        inner.handler().timer().bind(driver);
        Self { inner }
    }

    pub fn handler(&self) -> &P {
        self.inner.handler()
    }

    pub fn handler_mut(self: Pin<&mut Self>) -> Pin<&mut P> {
        self.project().inner.handler_mut()
    }
}

impl<'d, const ID: u8, P, E> dope::manifold::Manifold<'d> for TimedListener<'d, ID, P, E>
where
    P: Application<'d> + TimerHost<'d>,
    E: Env<Wire = P::Wire>,
{
    const ID: u8 = ID;

    fn dispatch(self: Pin<&mut Self>, ev: Event, driver: &mut DriverContext<'_, 'd>) {
        dope::manifold::Manifold::dispatch(self.project().inner, ev, driver)
    }

    fn activate(
        self: Pin<&mut Self>,
        target: TypedToken<Self>,
        driver: &mut DriverContext<'_, 'd>,
    ) {
        let typed =
            unsafe { TypedToken::<Listener<'d, ID, P, E>>::new_unchecked(target.into_inner()) };
        dope::manifold::Manifold::activate(self.project().inner, typed, driver)
    }

    fn pre_park(mut self: Pin<&mut Self>, driver: &mut DriverContext<'_, 'd>) {
        self.as_ref()
            .project_ref()
            .inner
            .handler()
            .timer()
            .tick(driver.turn_now());
        dope::manifold::Manifold::pre_park(self.as_mut().project().inner, driver)
    }

    fn idle(self: Pin<&Self>) -> Idle {
        let timer_idle = self.project_ref().inner.handler().timer().idle();
        dope::manifold::Manifold::idle(self.project_ref().inner).reduce(timer_idle)
    }

    fn shutdown(self: Pin<&mut Self>, driver: &mut DriverContext<'_, 'd>) {
        dope::manifold::Manifold::shutdown(self.project().inner, driver)
    }
}