described here should be considered experimental, subject to API changes without notice.
Class precedence list:
semaphore, structure-object, t
Semaphore type. The fact that a
semaphore
is astructure-object
should be considered an implementation detail, and may change in the future.
Name of a
queue
. Can be assingned to usingsetf
. Queue names can be arbitrary printable objects, and need not be unique.