Function wasmcloud_runtime::capability::wrpc::wasi::io::poll::poll

pub fn poll<'a, C: Invoke>(
    wrpc__: &'a C,
    cx__: C::Context,
    in_: &'a [ResourceBorrow<Pollable>],
) -> impl Future<Output = Result<Vec<u32>>> + Send + 'a

Poll for completion on a set of pollables.

This function takes a list of pollables, which identify I/O sources of interest, and waits until one or more of the events is ready for I/O.

The result list<u32> contains one or more indices of handles in the argument list that is ready for I/O.

If the list contains more elements than can be indexed with a u32 value, this function traps.

A timeout can be implemented by adding a pollable from the wasi-clocks API to the list.

This function does not return a result; polling in itself does not do any I/O so it doesn’t fail. If any of the I/O sources identified by the pollables has an error, it is indicated by marking the source as being reaedy for I/O.