wasmer_wasix/state/
types.rs

1// TODO: review allow..
2use cfg_if::cfg_if;
3
4cfg_if! {
5    if #[cfg(feature = "host-fs")] {
6        pub use virtual_fs::host_fs::{Stderr, Stdin, Stdout};
7    } else {
8        pub use virtual_fs::mem_fs::{Stderr, Stdin, Stdout};
9    }
10}
11
12#[derive(Debug, Clone)]
13#[allow(clippy::enum_variant_names)]
14pub enum PollEvent {
15    /// Data available to read
16    PollIn = 1,
17    /// Data available to write (will still block if data is greater than space available unless
18    /// the fd is configured to not block)
19    PollOut = 2,
20    /// Something didn't work. ignored as input
21    PollError = 4,
22    /// Connection closed. ignored as input
23    PollHangUp = 8,
24    /// Invalid request. ignored as input
25    PollInvalid = 16,
26}
27
28impl PollEvent {
29    fn from_i16(raw_num: i16) -> Option<PollEvent> {
30        Some(match raw_num {
31            1 => PollEvent::PollIn,
32            2 => PollEvent::PollOut,
33            4 => PollEvent::PollError,
34            8 => PollEvent::PollHangUp,
35            16 => PollEvent::PollInvalid,
36            _ => return None,
37        })
38    }
39}
40
41#[derive(Debug, Clone)]
42pub struct PollEventBuilder {
43    inner: PollEventSet,
44}
45
46pub type PollEventSet = i16;
47
48#[derive(Debug)]
49pub struct PollEventIter {
50    pes: PollEventSet,
51    i: usize,
52}
53
54impl Iterator for PollEventIter {
55    type Item = PollEvent;
56
57    fn next(&mut self) -> Option<Self::Item> {
58        if self.pes == 0 || self.i > 15 {
59            None
60        } else {
61            while self.i < 16 {
62                let result = PollEvent::from_i16(self.pes & (1 << self.i));
63                self.pes &= !(1 << self.i);
64                self.i += 1;
65                if let Some(r) = result {
66                    return Some(r);
67                }
68            }
69            unreachable!("Internal logic error in PollEventIter");
70        }
71    }
72}
73
74pub fn iterate_poll_events(pes: PollEventSet) -> PollEventIter {
75    PollEventIter { pes, i: 0 }
76}
77
78#[allow(dead_code)]
79impl PollEventBuilder {
80    pub fn new() -> PollEventBuilder {
81        PollEventBuilder { inner: 0 }
82    }
83
84    pub fn add(mut self, event: PollEvent) -> PollEventBuilder {
85        self.inner |= event as PollEventSet;
86        self
87    }
88
89    pub fn build(self) -> PollEventSet {
90        self.inner
91    }
92}
93
94#[allow(dead_code)]
95pub trait WasiPath {}
96
97/*
98TODO: Think about using this
99trait WasiFdBacking: std::fmt::Debug {
100    fn get_stat(&self) -> &Filestat;
101    fn get_stat_mut(&mut self) -> &mut Filestat;
102    fn is_preopened(&self) -> bool;
103    fn get_name(&self) -> &str;
104}
105*/
wasmer_wasix/state/types.rs

wasmer_wasix/state/
types.rs
