0df4e961c0
Currently, the use of the downcast method means that you have to use one of the hard-coded types. But Enarx needs to define its own `WasiFile` implementations. This works fine, except the resulting files cannot be used in poll because they aren't part of the hard-coded list. Replace this with an accessor method for the pollable type in `WasiFile`. Because we provide a default implementation of the method and manually implement it on all the hard-coded types, this is backwards compatible. Signed-off-by: Nathaniel McCallum <nathaniel@profian.com>
16 lines
664 B
Rust
16 lines
664 B
Rust
use crate::block_on_dummy_executor;
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use wasi_cap_std_sync::sched::windows::poll_oneoff_;
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use wasi_common::{file::WasiFile, sched::Poll, Error};
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pub async fn poll_oneoff<'a>(poll: &mut Poll<'a>) -> Result<(), Error> {
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// Tokio doesn't provide us the AsyncFd primitive on Windows, so instead
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// we use the blocking poll_oneoff implementation from the wasi-cap-std-crate.
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// We provide a function specific to this crate's WasiFile types for downcasting
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// to a RawHandle.
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block_on_dummy_executor(move || poll_oneoff_(poll, wasi_file_is_stdin))
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}
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pub fn wasi_file_is_stdin(f: &dyn WasiFile) -> bool {
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f.as_any().is::<crate::stdio::Stdin>()
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}
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