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  2. RPG400-L
  3. March 2008

Re: link list returned from service program

Buck wrote:
You can use a global variable to store the current state.

If you need multiple clients to call this, make each client ACTGRP(*NEW) and the service program (*CALLER). Each separate level will have its own stack and global state variables.

Another alternative is to not maintain a pointer to the head of the linked list. For operations like getParent() and getChild(), your service program only needs to know the element that the caller is currently working with.

If you really want to be able to get back to the first element easily, another option would be to have the caller pass a 'custTree' data structure which has two pointers, one pointing to the first element and one pointing to the 'current' element.

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