Skip to content

make LocalWaker::will_wake consistent with Waker::will_wake #128882

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
merged 1 commit into from
Aug 11, 2024
Merged

make LocalWaker::will_wake consistent with Waker::will_wake #128882

Changes from all commits
Commits
Show all changes
1 commit
Select commit
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
8 changes: 7 additions & 1 deletion library/core/src/task/wake.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -502,6 +502,8 @@ impl Waker {
#[must_use]
#[stable(feature = "futures_api", since = "1.36.0")]
pub fn will_wake(&self, other: &Waker) -> bool {
// We optimize this by comparing vtable addresses instead of vtable contents.
// This is permitted since the function is documented as best-effort.
let RawWaker { data: a_data, vtable: a_vtable } = self.waker;
let RawWaker { data: b_data, vtable: b_vtable } = other.waker;
a_data == b_data && ptr::eq(a_vtable, b_vtable)
Expand Down Expand Up @@ -761,7 +763,11 @@ impl LocalWaker {
#[must_use]
#[unstable(feature = "local_waker", issue = "118959")]
pub fn will_wake(&self, other: &LocalWaker) -> bool {
self.waker == other.waker
// We optimize this by comparing vtable addresses instead of vtable contents.
// This is permitted since the function is documented as best-effort.
let RawWaker { data: a_data, vtable: a_vtable } = self.waker;
let RawWaker { data: b_data, vtable: b_vtable } = other.waker;
a_data == b_data && ptr::eq(a_vtable, b_vtable)
}

/// Creates a new `LocalWaker` from [`RawWaker`].
Expand Down
Loading