Convenience Macros To Scan Data Structures

• Suppose we have a generic list with nodes looking like this:

  struct list_node {
          struct list_node *next;
          void *data;
  };

• And we have an instance of a list of 'struct access_data':

  struct access_data {
          unsigned int clock_ticks;
          int count;
  };

• And a global variable pointing to the head of the list:

  struct list_node *g_access_list_head;

Originally written by guy keren