Small fix for atomics when completing a future #62954
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
When a completed task updates the queue head to announce that it's been completed, it only did an acquire exchange. By also having it also do a release, we will ensure that prior writes done by the completed task, before the task is marked completed, will be correctly ordered as happening before any subsequent reads by tasks waiting on that completion status. Co-authored-by: John McCall <[email protected]>
|
@swift-ci please smoke test and merge |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
When a completed task updates the queue head to announce
that it's been completed, it only did an acquire exchange.
By also having it also do a release, we will ensure that
prior writes done by the completed task, before the task is
marked completed, will be correctly ordered as happening
before any subsequent reads by tasks waiting on that
completion status.
Thanks @rjmccall for spotting this issue!