Struct polars_io::pl_async::RuntimeManager

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pub struct RuntimeManager { /* private fields */ }
Available on crate feature async only.

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impl RuntimeManager

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pub fn block_on_potential_spawn<F>(&'static self, future: F) -> F::Output
where F: Future + Send, F::Output: Send,

Keep track of rayon threads that drive the runtime. Every thread only allows a single runtime. If this thread calls block_on and this rayon thread is already driving an async execution we must start a new thread otherwise we panic. This can happen when we parallelize reads over 100s of files.

§Safety

The tokio runtime flavor is multi-threaded.

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pub fn block_on<F>(&self, future: F) -> F::Output
where F: Future,

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pub fn spawn<F>(&self, future: F) -> JoinHandle<F::Output>
where F: Future + Send + 'static, F::Output: Send + 'static,

Spawns a future onto the Tokio runtime (see [tokio::runtime::Runtime::spawn]).

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