new function get_route_or_null that catches any exception before returning

[simgrid.git] / src / surf / surf_routing.c

diff --git a/src/surf/surf_routing.c b/src/surf/surf_routing.c
index 184ce55..8794bbc 100644 (file)
--- a/src/surf/surf_routing.c
+++ b/src/surf/surf_routing.c
@@ -809,6 +809,26 @@ static xbt_dynar_t get_route(const char *src, const char *dst)
   return route;
 }
 
+/**
+ * \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) {
+    return NULL;
+  }
+  return route;
+}
+
 /**
  * \brief Generic method: find a route between hosts
  *
@@ -935,6 +955,7 @@ void routing_model_create(size_t size_of_links, void *loopback, double_f_cpvoid_
   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;