You can do something similar in C - make struct wl_list the first member of struct data, and just cast the wl_list node pointer to a data pointer (offsetof is z

You can do something similar in C - make struct wl_list the first member of struct data, and just cast the wl_list node pointer to a data pointer (offsetof is zero). I think the most common reason for this generic-location offset-of style is so that the struct data can have multiple list nodes and be on multiple lists (without any extra allocation). This is pretty common in the kernel.