docs/Writerside/topics/list.h.md

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docs/3.1
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+# list.h
+
+This header defines a common interface for all list implementations.
+
+UCX already comes with two common list implementations (linked list and array list) that should cover most use cases.
+But if you feel the need to implement an own list, the only thing you need to do is to define a struct with a
+`struct cx_list_s` as first member, and set an appropriate list class that implements the functionality.
+It is strongly recommended that this class is shared among all instances of the same list type, because otherwise
+the `cxListCompare` function cannot use the optimized implementation of your class and will instead fall back to
+using iterators to compare the contents element-wise.

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