diff options
| -rw-r--r-- | library/core/src/task/wake.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/library/core/src/task/wake.rs b/library/core/src/task/wake.rs index 9ad71e394ea..09f3f2f02ea 100644 --- a/library/core/src/task/wake.rs +++ b/library/core/src/task/wake.rs @@ -99,6 +99,12 @@ impl RawWaker { /// [`RawWaker`] implementation. Calling one of the contained functions using /// any other `data` pointer will cause undefined behavior. /// +/// Note that while this type implements `PartialEq`, comparing function pointers, and hence +/// comparing structs like this that contain function pointers, is unreliable: pointers to the same +/// function can compare inequal (because functions are duplicated in multiple codegen units), and +/// pointers to *different* functions can compare equal (since identical functions can be +/// deduplicated within a codegen unit). +/// /// # Thread safety /// If the [`RawWaker`] will be used to construct a [`Waker`] then /// these functions must all be thread-safe (even though [`RawWaker`] is |