A number or
A function designator.
wait-reason provides the value returned by process-whostate when called on the current process.
wait-function is called periodically with arguments wait-args. wait-function may be called many times and in several places. Therefore wait-function should be fast and make no assumptions about its dynamic context.
wait-processing-events processes all events sent to the current process, including system events such as window messages on Microsoft Windows, and objects sent by other processes via process-send. In the latter case, the objects must be lists of the form
), which cause function to be applied to arguments (the values are discarded).
LispWorks User Guide and Reference Manual - 13 Feb 2015