Hook Functions

[Sumit Kumar Jain <sumitskj_20 yahoo com>]

Hello,
  I was going through GHook module of glib when i came across something  that i could not understand. There is a funciton g_hook_find_func in  which the second parameter when passed not TRUE should search hooks  which have also been destroyed. When we call destroy on the hook, the  hook_id become 0 if the reference count of the hook is greater than 1.  As i see from the code given below taken from glib 2.8.4 a hook is  returned only when its id is non zero. So if i call destroy on a hook  with reference count > 1 and call g_hook_find_func that hook wont be  searched. Can someone please tell me why is it like that or there is  something wrong in the way i am trying to do things.
  
  GHook*
    g_hook_find_func (GHookList *hook_list,
              gboolean   need_valids,
              gpointer   func)
    {
      GHook *hook;
      
      g_return_val_if_fail (hook_list != NULL, NULL);
      g_return_val_if_fail (func != NULL, NULL);
      
      hook = hook_list->hooks;
      while (hook)
        {
          /* test only non-destroyed hooks */
          if (hook->func == func &&
          hook->hook_id &&
          (!need_valids || G_HOOK_ACTIVE (hook)))
        return hook;
    
          hook = hook->next;
        }
      
      return NULL;
    }
  
  Regards,
  Sumit Kumar Jain

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