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rename a global to avoid namespace pollution (and other cosmetics)
[simgrid.git] / src / surf / surf_routing.c
index adbff02..66a0d1a 100644 (file)
@@ -19,7 +19,7 @@ int SURF_WKS_LEVEL;             //Surf workstation level
 int SIMIX_HOST_LEVEL;           //Simix level
 int MSG_HOST_LEVEL;             //Msg level
 int SD_HOST_LEVEL;              //Simdag level
-int COORD_HOST_LEVEL;           //Coordinates level
+int COORD_HOST_LEVEL=0;         //Coordinates level
 int NS3_HOST_LEVEL;             //host node for ns3
 
 xbt_lib_t link_lib;
@@ -32,16 +32,14 @@ int ROUTING_ASR_LEVEL;          //Routing level
 int COORD_ASR_LEVEL;            //Coordinates level
 int NS3_ASR_LEVEL;              //host node for ns3
 
-static xbt_dict_t patterns = NULL;
 static xbt_dict_t random_value = NULL;
 
 /* Global vars */
 routing_global_t global_routing = NULL;
-routing_component_t current_routing = NULL;
-model_type_t current_routing_model = NULL;
+AS_t current_routing = NULL;
 
 /* global parse functions */
-xbt_dynar_t link_list = NULL;   /* temporary store of current list link of a route */
+xbt_dynar_t parsed_link_list = NULL;   /* temporary store of current list link of a route */
 static const char *src = NULL;  /* temporary store the source name of a route */
 static const char *dst = NULL;  /* temporary store the destination name of a route */
 static char *gw_src = NULL;     /* temporary store the gateway source name of a route */
@@ -52,7 +50,6 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route, surf, "Routing part of surf");
 static void routing_parse_peer(sg_platf_peer_cbarg_t peer);     /* peer bypass */
 static void routing_parse_Srandom(void);        /* random bypass */
 
-static char *replace_random_parameter(char *chaine);
 static void routing_parse_postparse(void);
 
 /* this lines are only for replace use like index in the model table */
@@ -70,25 +67,25 @@ typedef enum {
 struct s_model_type routing_models[] = {
   {"Full",
    "Full routing data (fast, large memory requirements, fully expressive)",
-   model_full_create, NULL,NULL, model_full_end},
+   model_full_create, model_full_end},
   {"Floyd",
    "Floyd routing data (slow initialization, fast lookup, lesser memory requirements, shortest path routing only)",
-   model_floyd_create, NULL,NULL, model_floyd_end},
+   model_floyd_create, model_floyd_end},
   {"Dijkstra",
    "Dijkstra routing data (fast initialization, slow lookup, small memory requirements, shortest path routing only)",
-   model_dijkstra_create, NULL,NULL, model_dijkstra_both_end},
+   model_dijkstra_create, model_dijkstra_both_end},
   {"DijkstraCache",
    "Dijkstra routing data (fast initialization, fast lookup, small memory requirements, shortest path routing only)",
-   model_dijkstracache_create, NULL,NULL, model_dijkstra_both_end},
+   model_dijkstracache_create, model_dijkstra_both_end},
   {"none", "No routing (usable with Constant network only)",
-   model_none_create, NULL, NULL, NULL},
+   model_none_create,  NULL},
   {"RuleBased", "Rule-Based routing data (...)",
-   model_rulebased_create, NULL, NULL, NULL},
+   model_rulebased_create, NULL},
   {"Vivaldi", "Vivaldi routing",
-   model_vivaldi_create, NULL, NULL, NULL},
+   model_vivaldi_create, NULL},
   {"Cluster", "Cluster routing",
-   model_cluster_create, NULL, NULL, NULL},
-  {NULL, NULL, NULL, NULL, NULL, NULL}
+   model_cluster_create, NULL},
+  {NULL, NULL, NULL, NULL}
 };
 
 /**
@@ -101,20 +98,28 @@ static void parse_S_host(sg_platf_host_cbarg_t host)
     current_routing->hierarchy = SURF_ROUTING_BASE;
   xbt_assert(!xbt_lib_get_or_null(host_lib, host->id, ROUTING_HOST_LEVEL),
              "Reading a host, processing unit \"%s\" already exists", host->id);
-  xbt_assert(current_routing->set_processing_unit,
-             "no defined method \"set_processing_unit\" in \"%s\"",
-             current_routing->name);
-  (*(current_routing->set_processing_unit)) (current_routing, host->id);
+
+  current_routing->parse_PU(current_routing, host->id);
   info = xbt_new0(s_network_element_info_t, 1);
   info->rc_component = current_routing;
   info->rc_type = SURF_NETWORK_ELEMENT_HOST;
   xbt_lib_set(host_lib, host->id, ROUTING_HOST_LEVEL, (void *) info);
   if (host->coord && strcmp(host->coord, "")) {
+    unsigned int cursor;
+    char*str;
+
     if (!COORD_HOST_LEVEL)
-      xbt_die
-          ("To use coordinates, you must set configuration 'coordinates' to 'yes'");
-    xbt_dynar_t ctn = xbt_str_split_str(host->coord, " ");
+      xbt_die ("To use host coordinates, please add --cfg=coordinates:yes to your command line");
+
+    /* Pre-parse the host coordinates -- FIXME factorize with routers by overloading the routing->parse_PU function*/
+    xbt_dynar_t ctn_str = xbt_str_split_str(host->coord, " ");
+    xbt_dynar_t ctn = xbt_dynar_new(sizeof(double),NULL);
+    xbt_dynar_foreach(ctn_str,cursor, str) {
+      double val = atof(str);
+      xbt_dynar_push(ctn,&val);
+    }
     xbt_dynar_shrink(ctn, 0);
+    xbt_dynar_free(&ctn_str);
     xbt_lib_set(host_lib, host->id, COORD_HOST_LEVEL, (void *) ctn);
   }
 }
@@ -130,21 +135,29 @@ static void parse_S_router(sg_platf_router_cbarg_t router)
   xbt_assert(!xbt_lib_get_or_null(as_router_lib, router->id, ROUTING_ASR_LEVEL),
              "Reading a router, processing unit \"%s\" already exists",
              router->id);
-  xbt_assert(current_routing->set_processing_unit,
-             "no defined method \"set_processing_unit\" in \"%s\"",
-             current_routing->name);
-  (*(current_routing->set_processing_unit)) (current_routing, router->id);
+
+  current_routing->parse_PU(current_routing, router->id);
   info = xbt_new0(s_network_element_info_t, 1);
   info->rc_component = current_routing;
   info->rc_type = SURF_NETWORK_ELEMENT_ROUTER;
 
   xbt_lib_set(as_router_lib, router->id, ROUTING_ASR_LEVEL, (void *) info);
   if (strcmp(router->coord, "")) {
+    unsigned int cursor;
+    char*str;
+
     if (!COORD_ASR_LEVEL)
-      xbt_die
-          ("To use coordinates, you must set configuration 'coordinates' to 'yes'");
-    xbt_dynar_t ctn = xbt_str_split_str(router->coord, " ");
+      xbt_die ("To use host coordinates, please add --cfg=coordinates:yes to your command line");
+
+    /* Pre-parse the host coordinates */
+    xbt_dynar_t ctn_str = xbt_str_split_str(router->coord, " ");
+    xbt_dynar_t ctn = xbt_dynar_new(sizeof(double),NULL);
+    xbt_dynar_foreach(ctn_str,cursor, str) {
+      double val = atof(str);
+      xbt_dynar_push(ctn,&val);
+    }
     xbt_dynar_shrink(ctn, 0);
+    xbt_dynar_free(&ctn_str);
     xbt_lib_set(as_router_lib, router->id, COORD_ASR_LEVEL, (void *) ctn);
   }
 }
@@ -155,7 +168,7 @@ static void parse_S_router(sg_platf_router_cbarg_t router)
  */
 static void routing_parse_S_route(void)
 {
-  if (src != NULL && dst != NULL && link_list != NULL)
+  if (src != NULL && dst != NULL && parsed_link_list != NULL)
     THROWF(arg_error, 0, "Route between %s to %s can not be defined",
            A_surfxml_route_src, A_surfxml_route_dst);
   src = A_surfxml_route_src;
@@ -163,7 +176,7 @@ static void routing_parse_S_route(void)
   xbt_assert(strlen(src) > 0 || strlen(dst) > 0,
              "Some limits are null in the route between \"%s\" and \"%s\"",
              src, dst);
-  link_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
+  parsed_link_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
 }
 
 /**
@@ -171,7 +184,7 @@ static void routing_parse_S_route(void)
  */
 static void routing_parse_S_ASroute(void)
 {
-  if (src != NULL && dst != NULL && link_list != NULL)
+  if (src != NULL && dst != NULL && parsed_link_list != NULL)
     THROWF(arg_error, 0, "Route between %s to %s can not be defined",
            A_surfxml_ASroute_src, A_surfxml_ASroute_dst);
   src = A_surfxml_ASroute_src;
@@ -182,7 +195,7 @@ static void routing_parse_S_ASroute(void)
              || strlen(gw_dst) > 0,
              "Some limits are null in the route between \"%s\" and \"%s\"",
              src, dst);
-  link_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
+  parsed_link_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
 }
 
 /**
@@ -190,7 +203,7 @@ static void routing_parse_S_ASroute(void)
  */
 static void routing_parse_S_bypassRoute(void)
 {
-  if (src != NULL && dst != NULL && link_list != NULL)
+  if (src != NULL && dst != NULL && parsed_link_list != NULL)
     THROWF(arg_error, 0,
            "Bypass Route between %s to %s can not be defined",
            A_surfxml_bypassRoute_src, A_surfxml_bypassRoute_dst);
@@ -202,7 +215,7 @@ static void routing_parse_S_bypassRoute(void)
              || strlen(gw_dst) > 0,
              "Some limits are null in the route between \"%s\" and \"%s\"",
              src, dst);
-  link_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
+  parsed_link_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
 }
 
 /**
@@ -224,7 +237,7 @@ static void routing_parse_link_ctn(void)
     link_id = bprintf("%s_DOWN", A_surfxml_link_ctn_id);
     break;
   }
-  xbt_dynar_push(link_list, &link_id);
+  xbt_dynar_push(parsed_link_list, &link_id);
 }
 
 /**
@@ -232,13 +245,13 @@ static void routing_parse_link_ctn(void)
  */
 static void routing_parse_E_route(void)
 {
-  name_route_extended_t route = xbt_new0(s_name_route_extended_t, 1);
-  route->generic_route.link_list = link_list;
-  xbt_assert(current_routing->set_route,
+  route_t route = xbt_new0(s_route_t, 1);
+  route->link_list = parsed_link_list;
+  xbt_assert(current_routing->parse_route,
              "no defined method \"set_route\" in \"%s\"",
              current_routing->name);
-  (*(current_routing->set_route)) (current_routing, src, dst, route);
-  link_list = NULL;
+  current_routing->parse_route(current_routing, src, dst, route);
+  parsed_link_list = NULL;
   src = NULL;
   dst = NULL;
 }
@@ -248,15 +261,15 @@ static void routing_parse_E_route(void)
  */
 static void routing_parse_E_ASroute(void)
 {
-  name_route_extended_t e_route = xbt_new0(s_name_route_extended_t, 1);
-  e_route->generic_route.link_list = link_list;
+  route_t e_route = xbt_new0(s_route_t, 1);
+  e_route->link_list = parsed_link_list;
   e_route->src_gateway = xbt_strdup(gw_src);
   e_route->dst_gateway = xbt_strdup(gw_dst);
-  xbt_assert(current_routing->set_ASroute,
+  xbt_assert(current_routing->parse_ASroute,
              "no defined method \"set_ASroute\" in \"%s\"",
              current_routing->name);
-  (*(current_routing->set_ASroute)) (current_routing, src, dst, e_route);
-  link_list = NULL;
+  current_routing->parse_ASroute(current_routing, src, dst, e_route);
+  parsed_link_list = NULL;
   src = NULL;
   dst = NULL;
   gw_src = NULL;
@@ -268,15 +281,15 @@ static void routing_parse_E_ASroute(void)
  */
 static void routing_parse_E_bypassRoute(void)
 {
-  route_extended_t e_route = xbt_new0(s_route_extended_t, 1);
-  e_route->generic_route.link_list = link_list;
+  route_t e_route = xbt_new0(s_route_t, 1);
+  e_route->link_list = parsed_link_list;
   e_route->src_gateway = xbt_strdup(gw_src);
   e_route->dst_gateway = xbt_strdup(gw_dst);
-  xbt_assert(current_routing->set_bypassroute,
+  xbt_assert(current_routing->parse_bypassroute,
              "Bypassing mechanism not implemented by routing '%s'",
              current_routing->name);
-  (*(current_routing->set_bypassroute)) (current_routing, src, dst, e_route);
-  link_list = NULL;
+  current_routing->parse_bypassroute(current_routing, src, dst, e_route);
+  parsed_link_list = NULL;
   src = NULL;
   dst = NULL;
   gw_src = NULL;
@@ -296,14 +309,12 @@ static void routing_parse_E_bypassRoute(void)
  * @param AS_id name of this autonomous system. Must be unique in the platform
  * @param wanted_routing_type one of Full, Floyd, Dijkstra or similar. Full list in the variable routing_models, in src/surf/surf_routing.c
  */
-void routing_AS_open(const char *AS_id, const char *wanted_routing_type)
+void routing_AS_begin(const char *AS_id, const char *wanted_routing_type)
 {
-  routing_component_t new_routing;
-  model_type_t model = NULL;
+  AS_t new_as;
+  routing_model_description_t model = NULL;
   int cpt;
 
-  surf_parse_models_setup();    /* ensure that the models are created after the last <config> tag and before the first <AS>-like */
-
   /* search the routing model */
   for (cpt = 0; routing_models[cpt].name; cpt++)
     if (!strcmp(wanted_routing_type, routing_models[cpt].name))
@@ -319,17 +330,16 @@ void routing_AS_open(const char *AS_id, const char *wanted_routing_type)
   }
 
   /* make a new routing component */
-  new_routing = (routing_component_t) (*(model->create)) ();
-  new_routing->routing = model;
-  new_routing->hierarchy = SURF_ROUTING_NULL;
-  new_routing->name = xbt_strdup(AS_id);
-  new_routing->routing_sons = xbt_dict_new();
+  new_as = (AS_t) model->create();
+  new_as->model_desc = model;
+  new_as->hierarchy = SURF_ROUTING_NULL;
+  new_as->name = xbt_strdup(AS_id);
 
   if (current_routing == NULL && global_routing->root == NULL) {
 
     /* it is the first one */
-    new_routing->routing_father = NULL;
-    global_routing->root = new_routing;
+    new_as->routing_father = NULL;
+    global_routing->root = new_as;
 
   } else if (current_routing != NULL && global_routing->root != NULL) {
 
@@ -337,27 +347,20 @@ void routing_AS_open(const char *AS_id, const char *wanted_routing_type)
                (current_routing->routing_sons, AS_id),
                "The AS \"%s\" already exists", AS_id);
     /* it is a part of the tree */
-    new_routing->routing_father = current_routing;
+    new_as->routing_father = current_routing;
     /* set the father behavior */
     if (current_routing->hierarchy == SURF_ROUTING_NULL)
       current_routing->hierarchy = SURF_ROUTING_RECURSIVE;
     /* add to the sons dictionary */
     xbt_dict_set(current_routing->routing_sons, AS_id,
-                 (void *) new_routing, NULL);
+                 (void *) new_as, NULL);
     /* add to the father element list */
-    (*(current_routing->set_autonomous_system)) (current_routing, AS_id);
-    /* unload the prev parse rules */
-    if (current_routing->routing->unload)
-      (*(current_routing->routing->unload)) ();
-
+    current_routing->parse_AS(current_routing, AS_id);
   } else {
     THROWF(arg_error, 0, "All defined components must be belong to a AS");
   }
-  /* set the new parse rules */
-  if (new_routing->routing->load)
-    (*(new_routing->routing->load)) ();
   /* set the new current component of the tree */
-  current_routing = new_routing;
+  current_routing = new_as;
 }
 
 /**
@@ -371,7 +374,7 @@ void routing_AS_open(const char *AS_id, const char *wanted_routing_type)
  * even if you add stuff to a closed AS
  *
  */
-void routing_AS_close()
+void routing_AS_end()
 {
 
   if (current_routing == NULL) {
@@ -387,36 +390,14 @@ void routing_AS_close()
     xbt_lib_set(as_router_lib, current_routing->name, ROUTING_ASR_LEVEL,
                 (void *) info);
 
-    if (current_routing->routing->unload)
-      (*(current_routing->routing->unload)) ();
-    if (current_routing->routing->end)
-      (*(current_routing->routing->end)) ();
+    if (current_routing->model_desc->end)
+      current_routing->model_desc->end(current_routing);
     current_routing = current_routing->routing_father;
-    if (current_routing != NULL && current_routing->routing->load != NULL)
-      (*(current_routing->routing->load)) ();
   }
 }
 
 /* Aux Business methods */
 
-/**
- * \brief Get the AS name of the element
- *
- * \param name the host name
- *
- */
-static char *elements_As_name(const char *name)
-{
-  routing_component_t as_comp;
-
-  /* (1) find the as where the host is located */
-  as_comp = ((network_element_info_t)
-             xbt_lib_get_or_null(host_lib, name,
-                                 ROUTING_HOST_LEVEL))->rc_component;
-  return as_comp->name;
-}
-
-
 /**
  * \brief Get the AS father and the first elements of the chain
  *
@@ -427,21 +408,21 @@ static char *elements_As_name(const char *name)
  * father in the chain
  */
 static void elements_father(const char *src, const char *dst,
-                            routing_component_t * res_father,
-                            routing_component_t * res_src,
-                            routing_component_t * res_dst)
+                            AS_t * res_father,
+                            AS_t * res_src,
+                            AS_t * res_dst)
 {
   xbt_assert(src && dst, "bad parameters for \"elements_father\" method");
 #define ELEMENTS_FATHER_MAXDEPTH 16     /* increase if it is not enough */
-  routing_component_t src_as, dst_as;
-  routing_component_t path_src[ELEMENTS_FATHER_MAXDEPTH];
-  routing_component_t path_dst[ELEMENTS_FATHER_MAXDEPTH];
+  AS_t src_as, dst_as;
+  AS_t path_src[ELEMENTS_FATHER_MAXDEPTH];
+  AS_t path_dst[ELEMENTS_FATHER_MAXDEPTH];
   int index_src = 0;
   int index_dst = 0;
-  routing_component_t current;
-  routing_component_t current_src;
-  routing_component_t current_dst;
-  routing_component_t father;
+  AS_t current;
+  AS_t current_src;
+  AS_t current_dst;
+  AS_t father;
 
   /* (1) find the as where the src and dst are located */
   network_element_info_t src_data = xbt_lib_get_or_null(host_lib, src,
@@ -497,272 +478,155 @@ static void elements_father(const char *src, const char *dst,
  *
  * \param src the source host name 
  * \param dst the destination host name
- * \param *e_route the route where the links are stored
+ * \param *route the route where the links are stored. It is either NULL or a ready to use dynar
  * \param *latency the latency, if needed
  * 
  * This function is called by "get_route" and "get_latency". It allows to walk
- * recursively through the routing components tree.
+ * recursively through the ASes tree.
  */
-static void _get_route_latency(const char *src, const char *dst,
-                               xbt_dynar_t * route, double *latency)
+static void _get_route_and_latency(const char *src, const char *dst,
+                                   xbt_dynar_t * links, double *latency)
 {
+  void *link;
+  unsigned int cpt;
+  s_route_t route;
+  memset(&route,0,sizeof(route));
+
   XBT_DEBUG("Solve route/latency  \"%s\" to \"%s\"", src, dst);
   xbt_assert(src && dst, "bad parameters for \"_get_route_latency\" method");
 
-  routing_component_t common_father;
-  routing_component_t src_father;
-  routing_component_t dst_father;
+  /* Find how src and dst are interconnected */
+  AS_t common_father, src_father, dst_father;
   elements_father(src, dst, &common_father, &src_father, &dst_father);
 
+  /* If src and dst are in the same AS, life is good */
   if (src_father == dst_father) {       /* SURF_ROUTING_BASE */
 
-    route_extended_t e_route = NULL;
-    if (route) {
-      e_route = common_father->get_route(common_father, src, dst);
-      xbt_assert(e_route, "no route between \"%s\" and \"%s\"", src, dst);
-      *route = e_route->generic_route.link_list;
-    }
-    if (latency) {
-      *latency = common_father->get_latency(common_father, src, dst, e_route);
-      xbt_assert(*latency >= 0.0,
-                 "latency error on route between \"%s\" and \"%s\"", src, dst);
-    }
-    if (e_route) {
-      xbt_free(e_route->src_gateway);
-      xbt_free(e_route->dst_gateway);
-      xbt_free(e_route);
-    }
+    route.link_list = xbt_dynar_new(global_routing->size_of_link, NULL);
 
-  } else {                      /* SURF_ROUTING_RECURSIVE */
+    common_father->get_route(common_father, src, dst, &route);
+    *links = route.link_list;
 
-    route_extended_t e_route_bypass = NULL;
-    if (common_father->get_bypass_route)
-      e_route_bypass = common_father->get_bypass_route(common_father, src, dst);
+    if (latency)
+      *latency += common_father->get_latency(common_father, src, dst, &route);
 
-    xbt_assert(!latency || !e_route_bypass,
-               "Bypass cannot work yet with get_latency");
+    xbt_free(route.src_gateway);
+    xbt_free(route.dst_gateway);
+    return;
+  }
 
-    route_extended_t e_route_cnt = e_route_bypass
-        ? e_route_bypass : common_father->get_route(common_father,
-                                                    src_father->name,
-                                                    dst_father->name);
+  /* If we are here, src and dst are not in the same AS; check whether a direct bypass is defined */
 
-    xbt_assert(e_route_cnt, "no route between \"%s\" and \"%s\"",
-               src_father->name, dst_father->name);
+  route_t e_route_bypass = NULL;
+  if (common_father->get_bypass_route)
+    e_route_bypass = common_father->get_bypass_route(common_father, src, dst);
 
-    xbt_assert((e_route_cnt->src_gateway == NULL) ==
-               (e_route_cnt->dst_gateway == NULL),
-               "bad gateway for route between \"%s\" and \"%s\"", src, dst);
+  if (e_route_bypass) { /* Common ancestor is kind enough to declare a bypass route from src to dst -- use it and bail out */
+    if (latency)
+      xbt_die("Bypass cannot work yet with get_latency"); // FIXME: that limitation seems supurious to me -- check with alvin
 
-    if (route) {
-      *route = xbt_dynar_new(global_routing->size_of_link, NULL);
-    }
-    if (latency) {
-      *latency = common_father->get_latency(common_father,
-                                            src_father->name, dst_father->name,
-                                            e_route_cnt);
-      xbt_assert(*latency >= 0.0,
-                 "latency error on route between \"%s\" and \"%s\"",
-                 src_father->name, dst_father->name);
-    }
+    *links = xbt_dynar_new(global_routing->size_of_link, NULL);
 
-    void *link;
-    unsigned int cpt;
-
-    if (strcmp(src, e_route_cnt->src_gateway)) {
-      double latency_src;
-      xbt_dynar_t route_src;
-
-      _get_route_latency(src, e_route_cnt->src_gateway,
-                         (route ? &route_src : NULL),
-                         (latency ? &latency_src : NULL));
-      if (route) {
-        xbt_assert(route_src, "no route between \"%s\" and \"%s\"",
-                   src, e_route_cnt->src_gateway);
-        xbt_dynar_foreach(route_src, cpt, link) {
-          xbt_dynar_push(*route, &link);
-        }
-        xbt_dynar_free(&route_src);
-      }
-      if (latency) {
-        xbt_assert(latency_src >= 0.0,
-                   "latency error on route between \"%s\" and \"%s\"",
-                   src, e_route_cnt->src_gateway);
-        *latency += latency_src;
-      }
+    xbt_dynar_foreach(e_route_bypass->link_list, cpt, link) {
+      xbt_dynar_push(*links, &link);
     }
 
-    if (route) {
-      xbt_dynar_foreach(e_route_cnt->generic_route.link_list, cpt, link) {
-        xbt_dynar_push(*route, &link);
-      }
-    }
+    generic_free_route(e_route_bypass);
+    return;
+  }
 
-    if (strcmp(e_route_cnt->dst_gateway, dst)) {
-      double latency_dst;
-      xbt_dynar_t route_dst;
-
-      _get_route_latency(e_route_cnt->dst_gateway, dst,
-                         (route ? &route_dst : NULL),
-                         (latency ? &latency_dst : NULL));
-      if (route) {
-        xbt_assert(route_dst, "no route between \"%s\" and \"%s\"",
-                   e_route_cnt->dst_gateway, dst);
-        xbt_dynar_foreach(route_dst, cpt, link) {
-          xbt_dynar_push(*route, &link);
-        }
-        xbt_dynar_free(&route_dst);
-      }
-      if (latency) {
-        xbt_assert(latency_dst >= 0.0,
-                   "latency error on route between \"%s\" and \"%s\"",
-                   e_route_cnt->dst_gateway, dst);
-        *latency += latency_dst;
-      }
-    }
 
-    generic_free_extended_route(e_route_cnt);
+  /* Not in the same AS, no bypass. We'll have to find our path between the ASes recursively*/
+
+  route_t e_route_cnt = xbt_new0(s_route_t, 1);
+  e_route_cnt->link_list = xbt_dynar_new(global_routing->size_of_link, NULL);
+  common_father->get_route(common_father, src_father->name, dst_father->name, e_route_cnt);
+
+  xbt_assert(e_route_cnt, "no route between \"%s\" and \"%s\"",
+      src_father->name, dst_father->name);
+
+  xbt_assert((e_route_cnt->src_gateway == NULL) ==
+      (e_route_cnt->dst_gateway == NULL),
+      "bad gateway for route between \"%s\" and \"%s\"", src, dst);
+
+  *links = xbt_dynar_new(global_routing->size_of_link, NULL);
+
+  if (latency) {
+    *latency += common_father->get_latency(common_father,
+        src_father->name, dst_father->name,
+        e_route_cnt);
   }
-}
 
-/**
- * \brief Generic function for get_route, get_route_no_cleanup, and get_latency
- */
-static void get_route_latency(const char *src, const char *dst,
-                              xbt_dynar_t * route, double *latency, int cleanup)
-{
-  _get_route_latency(src, dst, route, latency);
-  xbt_assert(!route || *route, "no route between \"%s\" and \"%s\"", src, dst);
-  xbt_assert(!latency || *latency >= 0.0,
-             "latency error on route between \"%s\" and \"%s\"", src, dst);
-  if (route) {
-    xbt_dynar_free(&global_routing->last_route);
-    global_routing->last_route = cleanup ? *route : NULL;
+
+  /* If source gateway is not our source, we have to recursively find our way up to this point */
+  if (strcmp(src, e_route_cnt->src_gateway)) {
+    xbt_dynar_t route_src;
+
+    _get_route_and_latency(src, e_route_cnt->src_gateway,
+        (links ? &route_src : NULL),
+        latency);
+
+    xbt_dynar_foreach(route_src, cpt, link) {
+      xbt_dynar_push(*links, &link);
+    }
+    xbt_dynar_free(&route_src);
   }
-}
 
-/**
- * \brief Generic method: find a route between hosts
- *
- * \param src the source host name 
- * \param dst the destination host name
- * 
- * walk through the routing components tree and find a route between hosts
- * by calling the differents "get_route" functions in each routing component.
- * No need to free the returned dynar. It will be freed at the next call.
- */
-static xbt_dynar_t get_route(const char *src, const char *dst)
-{
-  xbt_dynar_t route = NULL;
-  get_route_latency(src, dst, &route, NULL, 1);
-  return route;
-}
+  xbt_dynar_foreach(e_route_cnt->link_list, cpt, link) {
+    xbt_dynar_push(*links, &link);
+  }
+
+  /* If dest gateway is not our destination, we have to recursively find our way from this point */
+  if (strcmp(e_route_cnt->dst_gateway, dst)) {
+    xbt_dynar_t route_dst;
+
+    _get_route_and_latency(e_route_cnt->dst_gateway, dst,
+        (links ? &route_dst : NULL),
+        latency);
+
+    xbt_dynar_foreach(route_dst, cpt, link) {
+      xbt_dynar_push(*links, &link);
+    }
+    xbt_dynar_free(&route_dst);
 
-/**
- * \brief Generic method: find a route between hosts
- *
- * \param src the source host name
- * \param dst the destination host name
- *
- * same as get_route, but return NULL if any exception is raised.
- */
-static xbt_dynar_t get_route_or_null(const char *src, const char *dst)
-{
-  xbt_dynar_t route = NULL;
-  xbt_ex_t exception;
-  TRY {
-    get_route_latency(src, dst, &route, NULL, 1);
-  } CATCH(exception) {
-    xbt_ex_free(exception);
-    return NULL;
   }
-  return route;
+
+  generic_free_route(e_route_cnt);
 }
 
 /**
- * \brief Generic method: find a route between hosts
+ * \brief Find a route between hosts
  *
  * \param src the source host name
  * \param dst the destination host name
+ * \param route where to store the list of links.
+ *              If *route=NULL, create a short lived dynar. Else, fill the provided dynar
+ * \param latency where to store the latency experienced on the path (or NULL if not interested)
+ *                It is the caller responsability to initialize latency to 0 (we add to provided route)
+ * \pre route!=NULL
  *
  * walk through the routing components tree and find a route between hosts
  * by calling the differents "get_route" functions in each routing component.
- * Leaves the caller the responsability to clean the returned dynar.
  */
-static xbt_dynar_t get_route_no_cleanup(const char *src, const char *dst)
+void routing_get_route_and_latency(const char *src, const char *dst,
+                                   xbt_dynar_t * route, double *latency)
 {
-  xbt_dynar_t route = NULL;
-  get_route_latency(src, dst, &route, NULL, 0);
-  return route;
-}
+  static xbt_dynar_t last_route = NULL;
 
-/*Get Latency*/
-static double get_latency(const char *src, const char *dst)
-{
-  double latency = -1.0;
-  get_route_latency(src, dst, NULL, &latency, 0);
-  return latency;
-}
+  int need_cleanup = !(*route);
 
-static int surf_parse_models_setup_already_called = 0;
-/* Call the last initialization functions, that must be called after the
- * <config> tag, if any, and before the first of cluster|peer|AS|trace|trace_connect
- */
-void surf_parse_models_setup()
-{
-  if (surf_parse_models_setup_already_called)
-    return;
-  surf_parse_models_setup_already_called = 1;
-  surf_config_models_setup();
-}
-
-
-/**
- * \brief Recursive function for finalize
- *
- * \param rc the source host name 
- * 
- * This fuction is call by "finalize". It allow to finalize the 
- * AS or routing components. It delete all the structures.
- */
-static void _finalize(routing_component_t rc)
-{
-  if (rc) {
-    xbt_dict_cursor_t cursor = NULL;
-    char *key;
-    routing_component_t elem;
-    xbt_dict_foreach(rc->routing_sons, cursor, key, elem) {
-      _finalize(elem);
-    }
-    xbt_dict_t tmp_sons = rc->routing_sons;
-    char *tmp_name = rc->name;
-    xbt_dict_free(&tmp_sons);
-    xbt_free(tmp_name);
-    xbt_assert(rc->finalize, "no defined method \"finalize\" in \"%s\"",
-               current_routing->name);
-    (*(rc->finalize)) (rc);
+  if (need_cleanup) {
+    xbt_dynar_free(&last_route);
+    last_route = *route = xbt_dynar_new(global_routing->size_of_link,NULL);
   }
-}
 
-/**
- * \brief Generic method: delete all the routing structures
- * 
- * walk through the routing components tree and delete the structures
- * by calling the differents "finalize" functions in each routing component
- */
-static void finalize(void)
-{
-  /* delete recursively all the tree */
-  _finalize(global_routing->root);
-  /* delete last_route */
-  xbt_dynar_free(&(global_routing->last_route));
-  /* delete global routing structure */
-  xbt_free(global_routing);
-  /* make sure that we will reinit the models while loading the platf once reinited -- HACK but there is no proper surf_routing_init() */
-  surf_parse_models_setup_already_called = 0;
+  _get_route_and_latency(src, dst, route, latency);
+
+  xbt_assert(!latency || *latency >= 0.0,
+             "negative latency on route between \"%s\" and \"%s\"", src, dst);
 }
 
-static xbt_dynar_t recursive_get_onelink_routes(routing_component_t rc)
+static xbt_dynar_t recursive_get_onelink_routes(AS_t rc)
 {
   xbt_dynar_t ret = xbt_dynar_new(sizeof(onelink_t), xbt_free);
 
@@ -778,7 +642,7 @@ static xbt_dynar_t recursive_get_onelink_routes(routing_component_t rc)
   //recursing
   char *key;
   xbt_dict_cursor_t cursor = NULL;
-  routing_component_t rc_child;
+  AS_t rc_child;
   xbt_dict_foreach(rc->routing_sons, cursor, key, rc_child) {
     xbt_dynar_t onelink_child = recursive_get_onelink_routes(rc_child);
     if (onelink_child) {
@@ -795,7 +659,7 @@ static xbt_dynar_t get_onelink_routes(void)
   return recursive_get_onelink_routes(global_routing->root);
 }
 
-e_surf_network_element_type_t get_network_element_type(const char *name)
+e_surf_network_element_type_t routing_get_network_element_type(const char *name)
 {
   network_element_info_t rc = NULL;
 
@@ -820,17 +684,9 @@ void routing_model_create(size_t size_of_links, void *loopback)
   /* config the uniq global routing */
   global_routing = xbt_new0(s_routing_global_t, 1);
   global_routing->root = NULL;
-  global_routing->get_route = get_route;
-  global_routing->get_route_or_null = get_route_or_null;
-  global_routing->get_latency = get_latency;
-  global_routing->get_route_no_cleanup = get_route_no_cleanup;
   global_routing->get_onelink_routes = get_onelink_routes;
-  global_routing->get_route_latency = get_route_latency;
-  global_routing->get_network_element_type = get_network_element_type;
-  global_routing->finalize = finalize;
   global_routing->loopback = loopback;
   global_routing->size_of_link = size_of_links;
-  global_routing->last_route = NULL;
   /* no current routing at moment */
   current_routing = NULL;
 }
@@ -883,34 +739,34 @@ void routing_model_create(size_t size_of_links, void *loopback)
 /* ************************* GENERIC PARSE FUNCTIONS ************************ */
 
 
-static void routing_parse_cluster(void)
+static void routing_parse_cluster(sg_platf_cluster_cbarg_t cluster)
 {
   char *host_id, *groups, *link_id = NULL;
+  xbt_dict_t patterns = NULL;
 
   s_sg_platf_host_cbarg_t host;
   s_sg_platf_link_cbarg_t link;
 
-  if (strcmp(struct_cluster->availability_trace, "")
-      || strcmp(struct_cluster->state_trace, "")) {
-    if (xbt_dict_size(patterns) == 0)
-      patterns = xbt_dict_new();
-    xbt_dict_set(patterns, "id", xbt_strdup(struct_cluster->id), free);
-    xbt_dict_set(patterns, "prefix", xbt_strdup(struct_cluster->prefix), free);
-    xbt_dict_set(patterns, "suffix", xbt_strdup(struct_cluster->suffix), free);
-  }
-
   unsigned int iter;
   int start, end, i;
   xbt_dynar_t radical_elements;
   xbt_dynar_t radical_ends;
 
-  XBT_DEBUG("<AS id=\"%s\"\trouting=\"Cluster\">", struct_cluster->id);
-  sg_platf_new_AS_open(struct_cluster->id, "Cluster");
+  if (strcmp(cluster->availability_trace, "")
+      || strcmp(cluster->state_trace, "")) {
+    patterns = xbt_dict_new();
+    xbt_dict_set(patterns, "id", xbt_strdup(cluster->id), free);
+    xbt_dict_set(patterns, "prefix", xbt_strdup(cluster->prefix), free);
+    xbt_dict_set(patterns, "suffix", xbt_strdup(cluster->suffix), free);
+  }
+
+
+  XBT_DEBUG("<AS id=\"%s\"\trouting=\"Cluster\">", cluster->id);
+  sg_platf_new_AS_begin(cluster->id, "Cluster");
 
   //Make all hosts
-  radical_elements = xbt_str_split(struct_cluster->radical, ",");
+  radical_elements = xbt_str_split(cluster->radical, ",");
   xbt_dynar_foreach(radical_elements, iter, groups) {
-    memset(&host, 0, sizeof(host));
 
     radical_ends = xbt_str_split(groups, "-");
     start = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 0, char *));
@@ -928,66 +784,49 @@ static void routing_parse_cluster(void)
     }
     for (i = start; i <= end; i++) {
       host_id =
-          bprintf("%s%d%s", struct_cluster->prefix, i, struct_cluster->suffix);
-      link_id = bprintf("%s_link_%d", struct_cluster->id, i);
+          bprintf("%s%d%s", cluster->prefix, i, cluster->suffix);
+      link_id = bprintf("%s_link_%d", cluster->id, i);
+
+      XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id, cluster->power);
 
-      XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id,
-                struct_cluster->power);
+      memset(&host, 0, sizeof(host));
       host.id = host_id;
-      if (strcmp(struct_cluster->availability_trace, "")) {
+      if (strcmp(cluster->availability_trace, "")) {
         xbt_dict_set(patterns, "radical", bprintf("%d", i), xbt_free);
-        char *tmp_availability_file =
-            xbt_strdup(struct_cluster->availability_trace);
-        xbt_str_varsubst(tmp_availability_file, patterns);
-        XBT_DEBUG("\tavailability_file=\"%s\"", tmp_availability_file);
-        host.power_trace = tmgr_trace_new(tmp_availability_file);
-        xbt_free(tmp_availability_file);
+        char *avail_file = xbt_str_varsubst(cluster->availability_trace, patterns);
+        XBT_DEBUG("\tavailability_file=\"%s\"", avail_file);
+        host.power_trace = tmgr_trace_new(avail_file);
+        xbt_free(avail_file);
       } else {
         XBT_DEBUG("\tavailability_file=\"\"");
       }
-      if (strcmp(struct_cluster->state_trace, "")) {
-        char *tmp_state_file = xbt_strdup(struct_cluster->state_trace);
-        xbt_str_varsubst(tmp_state_file, patterns);
-        XBT_DEBUG("\tstate_file=\"%s\"", tmp_state_file);
-        host.state_trace = tmgr_trace_new(tmp_state_file);
-        xbt_free(tmp_state_file);
+
+      if (strcmp(cluster->state_trace, "")) {
+        char *avail_file = xbt_str_varsubst(cluster->state_trace, patterns);
+        XBT_DEBUG("\tstate_file=\"%s\"", avail_file);
+        host.state_trace = tmgr_trace_new(avail_file);
+        xbt_free(avail_file);
       } else {
         XBT_DEBUG("\tstate_file=\"\"");
       }
 
-      host.power_peak = struct_cluster->power;
+      host.power_peak = cluster->power;
       host.power_scale = 1.0;
-      host.core_amount = struct_cluster->core_amount;
+      host.core_amount = cluster->core_amount;
       host.initial_state = SURF_RESOURCE_ON;
       host.coord = "";
       sg_platf_new_host(&host);
       XBT_DEBUG("</host>");
 
       XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id,
-                struct_cluster->bw, struct_cluster->lat);
+                cluster->bw, cluster->lat);
 
       memset(&link, 0, sizeof(link));
       link.id = link_id;
-      link.bandwidth = struct_cluster->bw;
-      link.latency = struct_cluster->lat;
+      link.bandwidth = cluster->bw;
+      link.latency = cluster->lat;
       link.state = SURF_RESOURCE_ON;
-
-      switch (struct_cluster->sharing_policy) {
-      case A_surfxml_cluster_sharing_policy_SHARED:
-        link.policy = SURF_LINK_SHARED;
-        break;
-      case A_surfxml_cluster_sharing_policy_FULLDUPLEX:
-        link.policy = SURF_LINK_FULLDUPLEX;
-        break;
-      case A_surfxml_cluster_sharing_policy_FATPIPE:
-        link.policy = SURF_LINK_FATPIPE;
-        break;
-      default:
-        surf_parse_error(bprintf
-                         ("Invalid cluster sharing policy for cluster %s",
-                          struct_cluster->id));
-        break;
-      }
+      link.policy = cluster->sharing_policy;
       sg_platf_new_link(&link);
 
       surf_parsing_link_up_down_t info =
@@ -1015,112 +854,50 @@ static void routing_parse_cluster(void)
   }
   xbt_dynar_free(&radical_elements);
 
-  // Add a router. It is magically used thanks to the way in which surf_routing_cluster is written, and it's very useful to connect clusters together
+  // Add a router. It is magically used thanks to the way in which surf_routing_cluster is written,
+  // and it's very useful to connect clusters together
   XBT_DEBUG(" ");
-  XBT_DEBUG("<router id=\"%s\"/>", struct_cluster->router_id);
-  s_sg_platf_router_cbarg_t router;
+  XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id);
   char *newid = NULL;
+  s_sg_platf_router_cbarg_t router;
   memset(&router, 0, sizeof(router));
-  router.id = struct_cluster->router_id;
+  router.id = cluster->router_id;
   router.coord = "";
   if (!router.id || !strcmp(router.id, ""))
     router.id = newid =
-        bprintf("%s%s_router%s", struct_cluster->prefix, struct_cluster->id,
-                struct_cluster->suffix);
+        bprintf("%s%s_router%s", cluster->prefix, cluster->id,
+                cluster->suffix);
   sg_platf_new_router(&router);
   free(newid);
 
   //Make the backbone
-  if ((struct_cluster->bb_bw != 0) && (struct_cluster->bb_lat != 0)) {
-    char *link_backbone = bprintf("%s_backbone", struct_cluster->id);
+  if ((cluster->bb_bw != 0) && (cluster->bb_lat != 0)) {
+    char *link_backbone = bprintf("%s_backbone", cluster->id);
     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link_backbone,
-              struct_cluster->bb_bw, struct_cluster->bb_lat);
+              cluster->bb_bw, cluster->bb_lat);
 
     memset(&link, 0, sizeof(link));
     link.id = link_backbone;
-    link.bandwidth = struct_cluster->bb_bw;
-    link.latency = struct_cluster->bb_lat;
+    link.bandwidth = cluster->bb_bw;
+    link.latency = cluster->bb_lat;
     link.state = SURF_RESOURCE_ON;
-
-    switch (struct_cluster->bb_sharing_policy) {
-    case A_surfxml_cluster_bb_sharing_policy_FATPIPE:
-      link.policy = SURF_LINK_FATPIPE;
-      break;
-    case A_surfxml_cluster_bb_sharing_policy_SHARED:
-      link.policy = SURF_LINK_SHARED;
-      break;
-    default:
-      surf_parse_error(bprintf
-                       ("Invalid bb sharing policy in cluster %s",
-                        struct_cluster->id));
-      break;
-    }
+    link.policy = cluster->bb_sharing_policy;
 
     sg_platf_new_link(&link);
 
-    surf_parsing_link_up_down_t info =
-        xbt_new0(s_surf_parsing_link_up_down_t, 1);
-    info->link_up =
-        xbt_lib_get_or_null(link_lib, link_backbone, SURF_LINK_LEVEL);
-    info->link_down = info->link_up;
-    surf_routing_cluster_add_link(struct_cluster->id, info);
+    surf_routing_cluster_add_backbone(current_routing, xbt_lib_get_or_null(link_lib, link_backbone, SURF_LINK_LEVEL));
 
     free(link_backbone);
   }
 
-  XBT_DEBUG(" ");
-
-  char *new_suffix = xbt_strdup("");
-
-  radical_elements = xbt_str_split(struct_cluster->suffix, ".");
-  xbt_dynar_foreach(radical_elements, iter, groups) {
-    if (strcmp(groups, "")) {
-      char *old_suffix = new_suffix;
-      new_suffix = bprintf("%s\\.%s", old_suffix, groups);
-      free(old_suffix);
-    }
-  }
-
-  xbt_dynar_free(&radical_elements);
-  xbt_free(new_suffix);
-
-  if (strcmp(struct_cluster->availability_trace, "")
-      || strcmp(struct_cluster->state_trace, ""))
-    xbt_dict_free(&patterns);
-
   XBT_DEBUG("</AS>");
-  sg_platf_new_AS_close();
+  sg_platf_new_AS_end();
   XBT_DEBUG(" ");
+  xbt_dict_free(&patterns); // no op if it were never set
 }
 
-/*
- * This function take a string and replace parameters from patterns dict.
- * It returns the new value.
- */
-static char *replace_random_parameter(char *string)
-{
-  char *test_string = NULL;
-
-  if (xbt_dict_size(random_value) == 0)
-    return string;
-
-  string = xbt_str_varsubst(string, patterns);  // for patterns of cluster
-  test_string = bprintf("${%s}", string);
-  test_string = xbt_str_varsubst(test_string, random_value);    //Add ${xxxxx} for random Generator
-
-  if (strcmp(test_string, "")) {        //if not empty, keep this value.
-    xbt_free(string);
-    string = test_string;
-  }                             //In other case take old value (without ${})
-  else
-    free(test_string);
-  return string;
-}
-
-static void routing_parse_postparse(void)
-{
+static void routing_parse_postparse(void) {
   xbt_dict_free(&random_value);
-  xbt_dict_free(&patterns);
 }
 
 static void routing_parse_peer(sg_platf_peer_cbarg_t peer)
@@ -1137,7 +914,7 @@ static void routing_parse_peer(sg_platf_peer_cbarg_t peer)
   surfxml_bufferstack_push(1);
 
   XBT_DEBUG("<AS id=\"%s\"\trouting=\"Full\">", peer->id);
-  sg_platf_new_AS_open(peer->id, "Full");
+  sg_platf_new_AS_begin(peer->id, "Full");
 
   XBT_DEBUG(" ");
   host_id = HOST_PEER(peer->id);
@@ -1158,6 +935,7 @@ static void routing_parse_peer(sg_platf_peer_cbarg_t peer)
   host.power_trace = peer->availability_trace;
   host.state_trace = peer->state_trace;
   host.core_amount = 1;
+  host.coord = peer->coord;
   sg_platf_new_host(&host);
 
 
@@ -1223,7 +1001,7 @@ static void routing_parse_peer(sg_platf_peer_cbarg_t peer)
   SURFXML_END_TAG(route);
 
   XBT_DEBUG("</AS>");
-  sg_platf_new_AS_close();
+  sg_platf_new_AS_end();
   XBT_DEBUG(" ");
 
   //xbt_dynar_free(&tab_elements_num);
@@ -1286,7 +1064,7 @@ static void routing_parse_Srandom(void)
        random_id, random->min, random->max, random->mean, random->std,
        random->generator, random->seed, random_radical);
 
-  if (xbt_dict_size(random_value) == 0)
+  if (!random_value)
     random_value = xbt_dict_new();
 
   if (!strcmp(random_radical, "")) {
@@ -1324,7 +1102,7 @@ static void routing_parse_Srandom(void)
         }
         break;
       default:
-        XBT_INFO("Malformed radical");
+        XBT_CRITICAL("Malformed radical");
         break;
       }
       res = random_generate(random);
@@ -1358,7 +1136,7 @@ void routing_register_callbacks()
   surfxml_add_callback(ETag_surfxml_bypassRoute_cb_list,
                        &routing_parse_E_bypassRoute);
 
-  surfxml_add_callback(STag_surfxml_cluster_cb_list, &routing_parse_cluster);
+  sg_platf_cluster_add_cb(routing_parse_cluster);
 
   sg_platf_peer_add_cb(routing_parse_peer);
   sg_platf_postparse_add_cb(routing_parse_postparse);
@@ -1367,3 +1145,31 @@ void routing_register_callbacks()
   instr_routing_define_callbacks();
 #endif
 }
+
+/**
+ * \brief Recursive function for finalize
+ *
+ * \param rc the source host name
+ *
+ * This fuction is call by "finalize". It allow to finalize the
+ * AS or routing components. It delete all the structures.
+ */
+static void finalize_rec(AS_t as) {
+  xbt_dict_cursor_t cursor = NULL;
+  char *key;
+  AS_t elem;
+
+  xbt_dict_foreach(as->routing_sons, cursor, key, elem) {
+    finalize_rec(elem);
+  }
+
+  as->finalize(as);
+}
+
+/** \brief Frees all memory allocated by the routing module */
+void routing_exit(void) {
+  if (!global_routing)
+    return;
+  finalize_rec(global_routing->root);
+  xbt_free(global_routing);
+}