sark-h2 0.28.2

Fiber-free HTTP/2 protocol primitives and manifold server for sark
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
155
156
157

use std::marker;

use sark_core::{
    life::session,
    manifold::{
        client::domain,
        schedule::{self, data},
    },
};
use sark_http::field::metadata::section::rules;

use crate::{
    ClientRole,
    conn::{self, machine::Connection},
    stream,
};

/// H2-native resident call domain.
#[repr(transparent)]
pub struct Domain<T, F = rules::RetainRaw> {
    pub(super) inner: schedule::Runtime<stream::Key, T, conn::DataBlock>,
    pub(super) marker: marker::PhantomData<fn() -> F>,
}

struct Drive<'a, F, C, D, E>
where
    F: rules::Policy,
    C: session::Storage,
{
    connection: &'a mut Connection<ClientRole, F, C>,
    driver: &'a mut D,
    failure: Option<domain::Failure<E, stream::Key>>,
}

impl<F, C, T, D> data::Driver<T> for Drive<'_, F, C, D, D::Error>
where
    F: rules::Policy,
    C: session::Storage,
    D: domain::Driver<Connection<ClientRole, F, C>, T>,
{
    type Key = stream::Key;
    type Block = conn::DataBlock;
    type Error = D::Error;

    fn can_continue(&self) -> bool {
        self.failure.is_none()
    }

    fn turn(
        &mut self,
        key: stream::Key,
        value: &mut T,
    ) -> Result<schedule::Turn<Self::Block>, Self::Error> {
        self.driver.data(self.connection, key, value)
    }

    fn settle(
        &mut self,
        key: stream::Key,
        value: &mut T,
        term: schedule::Terminal<Self::Error>,
    ) -> data::Settlement {
        match self.driver.settle(self.connection, key, value, term) {
            domain::Settlement::Keep => data::Settlement::Keep,
            domain::Settlement::Remove => data::Settlement::Remove,
            domain::Settlement::Failed {
                disposition: place,
                error,
            } => {
                self.failure = Some(error);
                match place {
                    domain::Disposition::Keep => data::Settlement::Keep,
                    domain::Disposition::Remove => data::Settlement::Remove,
                }
            }
        }
    }

    fn remove(&mut self, value: T) {
        self.driver.removed(value);
    }
}

impl<F, C, T> domain::Domain<Connection<ClientRole, F, C>, T> for Domain<T, F>
where
    F: rules::Policy,
    C: session::Storage,
{
    fn capacity(&self) -> usize {
        self.inner.capacity()
    }

    fn key_at(&self, index: usize) -> Option<stream::Key> {
        self.inner.key_at(index)
    }

    fn get(&self, stream: stream::Key) -> Option<&T> {
        self.inner.get(stream)
    }

    fn get_mut(&mut self, stream: stream::Key) -> Option<&mut T> {
        self.inner.get_mut(stream)
    }

    fn remove(&mut self, stream: stream::Key) -> Option<T> {
        self.inner.remove(stream)
    }

    fn has_work(&self) -> bool {
        self.inner.has_work()
    }

    fn try_insert(
        &mut self,
        stream: stream::Key,
        make: impl FnOnce() -> T,
    ) -> schedule::InsertResult<stream::Key, ()> {
        self.inner.try_store(stream, make)
    }

    fn transaction<P, R, E>(
        &mut self,
        key: stream::Key,
        check: impl FnOnce(&T) -> Result<(domain::Activation<conn::DataBlock>, P), E>,
        commit: impl FnOnce(&mut T, P) -> R,
    ) -> Result<R, schedule::Error<E>> {
        self.inner.transaction(key, |value| {
            let (act, plan) = check(&*value)?;
            let act = match act {
                domain::Activation::Keep => schedule::Activation::Keep,
                domain::Activation::Data(wait) => schedule::Activation::data(wait),
            };
            Ok((act, commit(value, plan)))
        })
    }

    fn resume(&mut self, conn: &mut Connection<ClientRole, F, C>, egress: schedule::Egress) {
        self.inner.resume(|| conn.flow().poll_wake(), egress);
    }

    fn drive<D: domain::Driver<Connection<ClientRole, F, C>, T>>(
        &mut self,
        conn: &mut Connection<ClientRole, F, C>,
        driver: &mut D,
    ) -> Result<schedule::Report, domain::Failure<D::Error, stream::Key>> {
        let mut turn = Drive {
            connection: conn,
            driver,
            failure: None,
        };
        let report = self.inner.drive_data(&mut turn);
        match turn.failure {
            Some(error) => Err(error),
            None => Ok(report),
        }
    }
}