+ _surf_cfg_cb_contexts_nthreads, NULL);
+
+ /* minimal number of user contexts to be run in parallel */
+ default_value_int = 2;
+ xbt_cfg_register(&_surf_cfg_set, "contexts/parallel_threshold",
+ "Minimal number of user contexts to be run in parallel (raw contexts only)",
+ xbt_cfgelm_int, &default_value_int, 1, 1,
+ _surf_cfg_cb_contexts_parallel_threshold, NULL);
+
+ /* minimal number of user contexts to be run in parallel */
+#ifdef HAVE_FUTEX_H
+ default_value = xbt_strdup("futex");
+#else //No futex on mac and posix is unimplememted yet
+ default_value = xbt_strdup("busy_wait");
+#endif
+ xbt_cfg_register(&_surf_cfg_set, "contexts/synchro",
+ "Synchronization mode to use when running contexts in parallel (either futex, posix or busy_wait)",
+ xbt_cfgelm_string, &default_value, 1, 1,
+ _surf_cfg_cb_contexts_parallel_mode, NULL);
+
+ default_value = xbt_strdup("no");
+ xbt_cfg_register(&_surf_cfg_set, "network/coordinates",
+ "\"yes\" or \"no\", specifying whether we use a coordinate-based routing (as Vivaldi)",
+ xbt_cfgelm_string, &default_value, 1, 1,
+ _surf_cfg_cb__surf_network_coordinates, NULL);
+ xbt_cfg_setdefault_string(_surf_cfg_set, "network/coordinates", default_value);