NewList() - Do we need to allocate memory?

[nyteschayde]

When using the NewList() function described in exec/lists.h (at least in SAS/C 6.58), does one need to allocate memory for a new list separately? What does NewList() do exactly?

Code: [Select]


/* Is NewList(struct List *) the same as the following? */
struct List *list;

list = (struct List *)AllocMem(sizeof(struct List), MEMF_ANY);
memset(list, 0L, sizeof(struct List));

/* Or does it do some magic black box stuff? And if I want to pass
    my list around, should I malloc() the memory for the list and then
    remember to free it myself later; after passing it around */
list = (struct List *)malloc(sizeof(struct List));
NewList(list);
// ... use the list
free(list);


[nyteschayde]

Also, do the Amiga link list style methods include one that counts or one that counts the number of items in the list? Is there a method that will walk the link list until next points to null or next points to the head and count or should we have to write that ourselves?

[nyteschayde]

As usual, you are a fantastic teacher. You hold so much in the way of domain knowledge. Thanks for taking the time and teaching. I may have more questions along different topic lines. I'll post in new threads so others can benefit from my learning and your teaching.

<3