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[oden-js] Promise completion needs to be more robust

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As predicted.
This commit is contained in:
John Doty 2023-06-30 06:26:16 -07:00
parent 44c39b1740
commit b77e7eba3e
1 changed files with 33 additions and 26 deletions
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17
oden-js/src/runtime.rs
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@ -175,13 +175,21 @@ impl Runtime {
/// Process all pending async jobs. This includes all promise resolutions.
fn process_promise_completions(&self) {
// TODO: This could be more robust if we buffered all the completed
// promise entries and then dropped the borrow of the state, so
// that we never invoked user code while borrowing our private
// state mutably.
let mut promises = vec![];
// First, gather all the completed promises into a temporary vector
// so that we only need to borrow our mutable state for a short
// period of time.
let mut state = unsafe { PrivateState::from_rt_mut(self.rt) };
while let Ok((handle, evt)) = state.promise_recv.try_recv() {
if let Some(entry) = state.promise_table.remove(&handle) {
promises.push((entry, evt));
}
}
drop(state); // Don't need our internal state anymore.
// Nowe we can complete all the promises.
for (entry, evt) in promises {
let ctx = ContextRef::from_raw(entry.context);
let (callback, value) = match evt {
PromiseEvent::Resolved(v) => (entry.resolve, v),
@ -206,7 +214,6 @@ impl Runtime {
.expect("Exception thrown by promise callback");
}
}
}
/// Process all pending async jobs. This includes all promise resolutions.
pub fn process_all_jobs(&self) -> Result<()> {