db2e6c236d
An application can (optionally) use this to spawn a single tokio thread instead of one per processor thread.
28 lines
872 B
Rust
28 lines
872 B
Rust
use std::{future::Future, thread};
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#[cfg(feature = "tokio")]
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pub struct SingleThreadExecutor(tokio::runtime::Runtime);
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#[cfg(feature = "tokio")]
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impl iced_native::Executor for SingleThreadExecutor {
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fn new() -> Result<Self, iced::futures::io::Error> {
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// Current thread executor requires calling `block_on` to actually run
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// futures. Main thread is busy with things other than running futures,
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// so spawn a single worker thread.
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Ok(Self(
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tokio::runtime::Builder::new_multi_thread()
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.worker_threads(1)
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.enable_all()
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.build()?,
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))
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}
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fn spawn(&self, future: impl Future<Output = ()> + Send + 'static) {
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let _ = self.0.spawn(future);
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}
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fn enter<R>(&self, f: impl FnOnce() -> R) -> R {
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let _guard = self.0.enter();
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f()
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}
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}
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