Sha256: 3cf48614288715f625514a73ae642f649c2635a402a3ad90278bbee116a7234c
Contents?: true
Size: 1.04 KB
Versions: 39
Compression:
Stored size: 1.04 KB
Contents
use std::future::Future;
use std::pin::Pin;
use std::ptr;
use std::task::{Context, Poll, RawWaker, RawWakerVTable, Waker};
// Executor for a future that resolves immediately (test only).
#[allow(clippy::missing_panics_doc)]
pub fn block_on_simple<F: Future>(mut fut: F) -> F::Output {
unsafe fn clone(_null: *const ()) -> RawWaker {
unimplemented!()
}
unsafe fn wake(_null: *const ()) {
unimplemented!()
}
unsafe fn wake_by_ref(_null: *const ()) {
unimplemented!()
}
unsafe fn drop(_null: *const ()) {}
let data = ptr::null();
let vtable = &RawWakerVTable::new(clone, wake, wake_by_ref, drop);
let raw_waker = RawWaker::new(data, vtable);
let waker = unsafe { Waker::from_raw(raw_waker) };
let mut cx = Context::from_waker(&waker);
// fut does not move until it gets dropped.
let fut = unsafe { Pin::new_unchecked(&mut fut) };
match fut.poll(&mut cx) {
Poll::Ready(output) => output,
Poll::Pending => panic!("future did not resolve immediately"),
}
}
Version data entries
39 entries across 39 versions & 1 rubygems