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Fix IO_Event_List_empty() condition #218

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Merged
samuel-williams-shopify merged 1 commit into from
Aug 26, 2026
Merged

Fix IO_Event_List_empty() condition #218

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2 changes: 1 addition & 1 deletion ext/io/event/list.h
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Original file line number Diff line number Diff line change
Expand Up @@ -90,7 +90,7 @@ inline static size_t IO_Event_List_memory_size(const struct IO_Event_List *list)
// Return true if the list is empty.
inline static int IO_Event_List_empty(const struct IO_Event_List *list)
{
return list->head == list->tail;
return list->head == list;
}

// Enumerate all items in the list, assuming the list will not be modified during iteration.
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4 changes: 4 additions & 0 deletions releases.md
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@@ -1,5 +1,9 @@
# Releases

## Unreleased

- Fix the `URing` completion free-list empty check so its sole entry can be reused instead of unnecessarily allocating a new completion.

## v1.20.0

- Add compatibility with Ruby 4.1's fiber scheduler interface version 4. Buffered IO operations now use `(offset, length)`, perform a single transfer of at most `length` bytes, return short transfers directly, and report `-EAGAIN` without waiting. Earlier Ruby versions retain the existing minimum-progress behavior.
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