-/* This function is a pimple that we ought to fix. But it won't be easy.
- *
- * The surf_solve() function does properly return the set of actions that changed.
- * Instead, each model change a global data, and then the caller of surf_solve must
- * pick into these sets of action_failed and action_done.
- *
- * This was not clean but ok as long as we didn't had to restart the processes when the resource comes back up.
- * We worked by putting sentinel actions on every resources we are interested in,
- * so that surf informs us if/when the corresponding resource fails.
- *
- * But this does not work to get Simix informed of when a resource comes back up, and this is where this pimple comes.
- * We have a set of resources that are currently down and for which simix needs to know when it comes back up.
- * And the current function is called *at every simulation step* to sweep over that set, searching for a resource
- * that was turned back up in the meanwhile. This is UGLY and slow.
- *
- * The proper solution would be to not rely on globals for the action_failed and action_done swags.
- * They must be passed as parameter by the caller (the handling of these actions in simix may let you
- * think that these two sets can be merged, but their handling in SimDag induce the contrary unless this
- * simdag code can check by itself whether the action is done of failed -- seems very doable, but yet more
- * cleanup to do).
- *
- * Once surf_solve() is passed the set of actions that changed, you want to add a new set of resources back up
- * as parameter to this function. You also want to add a boolean field "restart_watched" to each resource, and
- * make sure that whenever a resource with this field enabled comes back up, it's added to that set so that Simix
- * sees it and react accordingly. This would kill that need for surf to call simix.
- *
- */
+/* model_list_invoke contains only surf_host and surf_vm.
+ * The callback functions of cpu_model and network_model will be called from those of these host models. */
+xbt_dynar_t all_existing_models = NULL; /* to destroy models correctly */
+xbt_dynar_t model_list_invoke = NULL; /* to invoke callbacks */