, but does the operation atomically.
One of the specific set of places defined for low level atomic operations.
A list (the new value of place).
is the same as
, but is guaranteed atomic for a suitable place.
must be one of the places described in Low level atomic operations, or expand to one of them.
In many cases the natural inverse of
, but there is no way to do
atomically, except by using a separate lock, which must also be held while doing the
LispWorks User Guide and Reference Manual - 21 Dec 2011