Thread: how to copy a generic linked list node structure

  1. #1
    Registered User
    Join Date
    Jan 2011

    how to copy a generic linked list node structure

    Hi i am having problems copying this data structure (memory leaks), so I was wondering if anyone could help me with it.

    typedef struct List {
    	int x; 
    	void *ptr;             
    	struct List *next;  
    } List;
    The problem is allocating memory for void *ptr.



  2. #2
    Registered User
    Join Date
    Apr 2013
    If you've allocated memory using ptr, then you copy another structure that copies over ptr, you just lost the pointer to the memory that was addressed by ptr.

  3. #3
    Registered User
    Join Date
    Mar 2010
    What have you done so far? Could you post the copy code you've written, and explain how it doesn't work?

    What is ptr? Is it a void* because it can point to many different things? If so, how do you determine what the current ptr points to?

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