windows-scratch-list

Arguments: parent-stream &key owned-p states

This function is the same as the more common function windows, except that it avoids consing the returned list of windows by destructively modifying and returning a single internal "scratch list". Care must be taken if using this function, since any subsequent call in the same thread to either windows-scratch-list (this function) or windows, even by internal Common Graphics code, will effectively destroy the returned value. It is probably useful only in tight loops where the returned list is referenced immediately and disregarded thereafter.

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Created 2019.8.20.