ref: 7a1a90f46e6c7de5ce85bac73ecc8c4931900d7c
dir: /ll.h/
typedef struct Linked Linked;
struct Linked
{
void *ptr;
Linked *next;
Linked *prev;
};
void ladd(Linked**, void*);
void ldel(Linked**, void*, void (*f)(void*));
void* lfind(Linked**, int (*f)(void*,void*), void*);