diff options
| -rw-r--r-- | library/std/src/thread/mod.rs | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/library/std/src/thread/mod.rs b/library/std/src/thread/mod.rs index 26b2fb44724..2552d6316fa 100644 --- a/library/std/src/thread/mod.rs +++ b/library/std/src/thread/mod.rs @@ -1380,6 +1380,11 @@ where } /// The internal representation of a `Thread` handle +/// +/// We explicitly set the alignment for our guarantee in Thread::into_raw. This +/// allows applications to stuff extra metadata bits into the alignment, which +/// can be rather useful when working with atomics. +#[repr(align(8))] struct Inner { name: Option<ThreadNameString>, id: ThreadId, @@ -1563,7 +1568,8 @@ impl Thread { /// Consumes the `Thread`, returning a raw pointer. /// /// To avoid a memory leak the pointer must be converted - /// back into a `Thread` using [`Thread::from_raw`]. + /// back into a `Thread` using [`Thread::from_raw`]. The pointer is + /// guaranteed to be aligned to at least 8 bytes. /// /// # Examples /// |