Lockless programming is considered by many to be more difficult than
lock-based programming, but there are a few lockless design patterns that
have been built out into an API. One of these APIs is sequence locking.
-Although this APIs can be used in extremely complex ways, there are simple
+Although this API can be used in extremely complex ways, there are simple
and effective ways of using it that avoid the need to pay attention to
memory ordering.
operations from the previous section only when there are no racing
accesses. Otherwise, use only fully ordered operations when accessing
or modifying the variable. This approach guarantees that code prior
-to a given access to that variable will be seen by all CPUs has having
+to a given access to that variable will be seen by all CPUs as having
happened before any code following any later access to that same variable.
Please note that per-CPU functions are not atomic operations and