* Content written into the node before enqueue is guaranteed to be
* consistent, but no other memory ordering is ensured.
* It is valid to reuse and free a dequeued node immediately.
* Content written into the node before enqueue is guaranteed to be
* consistent, but no other memory ordering is ensured.
* It is valid to reuse and free a dequeued node immediately.
* dest_q must be already initialized.
* Content written into the node before enqueue is guaranteed to be
* consistent, but no other memory ordering is ensured.
* dest_q must be already initialized.
* Content written into the node before enqueue is guaranteed to be
* consistent, but no other memory ordering is ensured.