c - redis list实现中下面这句话什么意思啊

Question

// 如果列表有自带的 free 方法，那么先对节点值调用它
if (list->free) list->free(current->value);

不知道list->free是如何进行free的，貌似没看到相关定义呀。

Answer 1

These free functions seem to be customized, and redis itself is not executed.

Answer 2

This is a function pointer list with different free implementations. It is recommended to search for the place where the value is assigned to free