pub trait Host:
Send
+ HostPollable
+ Send {
// Required method
fn poll(
&mut self,
in_: Vec<Resource<Pollable>>,
) -> impl Future<Output = Result<Vec<u32>>> + Send;
}
Required Methods§
Sourcefn poll(
&mut self,
in_: Vec<Resource<Pollable>>,
) -> impl Future<Output = Result<Vec<u32>>> + Send
fn poll( &mut self, in_: Vec<Resource<Pollable>>, ) -> impl Future<Output = Result<Vec<u32>>> + Send
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.
This function traps if either:
- the list is empty, or:
- the list contains more elements than can be indexed with a
u32
value.
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 ready for I/O.
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.
Implementations on Foreign Types§
Source§impl<_T: Host + ?Sized + Send> Host for &mut _T
impl<_T: Host + ?Sized + Send> Host for &mut _T
Source§async fn poll(&mut self, in_: Vec<Resource<Pollable>>) -> Result<Vec<u32>>
async fn poll(&mut self, in_: Vec<Resource<Pollable>>) -> Result<Vec<u32>>
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.
This function traps if either:
- the list is empty, or:
- the list contains more elements than can be indexed with a
u32
value.
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 ready for I/O.