use dope_sys::{
engine::{Complete, life::Resolver as _},
io::reactor::{
complete::{self, resolve::Reclaimed},
ready::{Backend as _, delivery::entry, store::State as _},
},
probe::Stopped,
};
use crate::{
Backend, Engine, Events,
driver::{
life::native::{self, host::poll::events, resolver::Resolver},
receive::tokens,
result::poll::{self, fault},
retained::flight,
},
io,
};
type Buffer<'d> = tokens::Token<'d, <Engine as Complete>::Pending>;
type Rejected<'d> = Stopped<Option<Buffer<'d>>, fault::Fault>;
impl From<native::host::poll::Failure> for poll::Dispatch<'_> {
fn from(error: native::host::poll::Failure) -> Self {
Self::Fault(poll::Failure::Native(poll::Error::from_backend(error)))
}
}
pub(crate) fn resolve<'d, S>(
root: &mut Resolver<'_, 'd, S>,
entry: tokens::Entry<'d>,
) -> Result<Option<io::Event<'d>>, Rejected<'d>> {
let local = &mut root.local;
let drain = flight::Drain::new(local.flights, local.driver);
let done = match entry.decode::<Events, _>() {
complete::Dequeued::Emit(done) => {
match entry::Event::<events::Context<Backend>, _>::resolve(
done,
local.backend.state_mut().edit().files,
&drain,
) {
entry::Resolved::Public(done) => {
return Ok(Some(done));
}
entry::Resolved::Rejected(done) => {
return reclaimed(root, done).map(|()| None);
}
entry::Resolved::Reclaim(done) => done,
}
}
complete::Dequeued::Reclaim(done) => done,
};
let done = entry::Event::<events::Context<Backend>, _>::reclaim(done, &drain);
reclaimed(root, done).map(|()| None)
}
pub(crate) fn reclaim<'d, S>(
root: &mut Resolver<'_, 'd, S>,
entry: tokens::Entry<'d>,
) -> Result<(), Rejected<'d>> {
let drain = flight::Drain::new(root.local.flights, root.local.driver);
let (complete::Dequeued::Emit(done) | complete::Dequeued::Reclaim(done)) =
entry.decode::<Events, _>();
let done = entry::Event::<events::Context<Backend>, _>::reclaim(done, &drain);
reclaimed(root, done)
}
fn reclaimed<'d, S>(
root: &mut Resolver<'_, 'd, S>,
done: Reclaimed<Buffer<'d>, entry::Retired<events::Context<Backend>>, fault::Fault>,
) -> Result<(), Rejected<'d>> {
let Reclaimed {
buffer,
report,
result,
} = done;
let result = Stopped::attach(buffer, result).map(|(buffer, ())| {
if let Some(buffer) = buffer {
buffer.release(root.local);
}
});
root.retire();
if let Some(report) = report {
root.local.lifecycle.report(report.into());
}
result
}