19.0.0 released Nov 08, 2023
Purpose: Delete FIFO list data.
purge-fifo <list> [ delete ]
purge-fifo will delete all elements from the FIFO <list>, created by new-fifo. The list is then empty and you can still put data into it, and get data from it afterwards, without having to call new-fifo again.
If you use "delete" clause, then all the internal memory of a <list> is freed, and you must call new-fifo in order to use it again.
Note that in any case, purge-fifo will not free any possibly allocated memory for keys or values stored in its elements (see write-fifo).
See memory-handling for more on when (not) to delete memory explicitly like this; the same rules apply as for delete-mem.
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