Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

[Merged by Bors] - Increment last event count on next instead of iter #2382

Closed
wants to merge 7 commits into from
Closed

[Merged by Bors] - Increment last event count on next instead of iter #2382

Changes from 1 commit
Commits
Show all changes
7 commits
Select commit Hold shift + click to select a range
1a79f4d
Increment last event count on next instead of iter
TheRawMeatball Jun 23, 2021
bc6876c
Merge remote-tracking branch 'upstream/main' into finer-event-mark-read
TheRawMeatball Jun 23, 2021
afde1ac
Improve lifetime seperation
TheRawMeatball Jun 23, 2021
14824a8
Fix split borrow issue
TheRawMeatball Jun 23, 2021
b29f8a6
fix potential issue with next_back
TheRawMeatball Jun 24, 2021
19ab00b
fix test
TheRawMeatball Jun 24, 2021
aac4dea
simplify lifetimes
cart Feb 2, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
50 changes: 15 additions & 35 deletions crates/bevy_ecs/src/event.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -188,13 +188,13 @@ impl<T> Default for ManualEventReader<T> {

impl<T> ManualEventReader<T> {
/// See [`EventReader::iter`]
pub fn iter<'a>(&mut self, events: &'a Events<T>) -> impl DoubleEndedIterator<Item = &'a T> {
pub fn iter<'a>(&'a mut self, events: &'a Events<T>) -> impl DoubleEndedIterator<Item = &'a T> {
internal_event_reader(&mut self.last_event_count, events).map(|(e, _)| e)
}

/// See [`EventReader::iter_with_id`]
pub fn iter_with_id<'a>(
&mut self,
&'a mut self,
events: &'a Events<T>,
) -> impl DoubleEndedIterator<Item = (&'a T, EventId<T>)> {
internal_event_reader(&mut self.last_event_count, events)
Expand All @@ -204,9 +204,9 @@ impl<T> ManualEventReader<T> {
/// Like [`iter_with_id`](EventReader::iter_with_id) except not emitting any traces for read
/// messages.
fn internal_event_reader<'a, T>(
last_event_count: &mut usize,
last_event_count: &'a mut usize,
events: &'a Events<T>,
) -> impl DoubleEndedIterator<Item = (&'a T, EventId<T>)> {
) -> impl DoubleEndedIterator<Item = (&'a T, EventId<T>)> + 'a {
// if the reader has seen some of the events in a buffer, find the proper index offset.
// otherwise read all events in the buffer
let a_index = if *last_event_count > events.a_start_event_count {
Expand All @@ -219,37 +219,17 @@ fn internal_event_reader<'a, T>(
} else {
0
};
*last_event_count = events.event_count;
match events.state {
State::A => events
.events_b
.get(b_index..)
.unwrap_or_else(|| &[])
.iter()
.map(map_instance_event_with_id)
.chain(
events
.events_a
.get(a_index..)
.unwrap_or_else(|| &[])
.iter()
.map(map_instance_event_with_id),
),
State::B => events
.events_a
.get(a_index..)
.unwrap_or_else(|| &[])
.iter()
.map(map_instance_event_with_id)
.chain(
events
.events_b
.get(b_index..)
.unwrap_or_else(|| &[])
.iter()
.map(map_instance_event_with_id),
),
}
let a = events.events_a.get(a_index..).unwrap_or_else(|| &[]);
let b = events.events_b.get(b_index..).unwrap_or_else(|| &[]);
let unread_count = a.len() + b.len();
*last_event_count = events.event_count - unread_count;
let iterator = match events.state {
State::A => b.iter().chain(a.iter()),
State::B => a.iter().chain(b.iter()),
};
iterator
.map(map_instance_event_with_id)
.inspect(move |_| *last_event_count += 1)
}

impl<'a, T: Component> EventReader<'a, T> {
Expand Down