xbt_cfg_register(&_sg_cfg_set, "contexts/factory",
"Context factory to use in SIMIX (ucontext, thread or raw)",
xbt_cfgelm_string, 1, 1, _sg_cfg_cb_context_factory, NULL);
+#ifndef WIN32
xbt_cfg_setdefault_string(_sg_cfg_set, "contexts/factory", "ucontext");
+#else
+ xbt_cfg_setdefault_string(_sg_cfg_set, "contexts/factory", "raw");
+#endif
/* stack size of contexts in Ko */
xbt_cfg_register(&_sg_cfg_set, "contexts/stack_size",