XBT_PUBLIC(size_t) sg_host_extension_create(void(*deleter)(void*));
XBT_PUBLIC(void*) sg_host_extension_get(sg_host_t host, size_t rank);
XBT_PUBLIC(sg_host_t) sg_host_by_name(const char *name);
XBT_PUBLIC(const char*) sg_host_get_name(sg_host_t host);
XBT_PUBLIC(size_t) sg_host_extension_create(void(*deleter)(void*));
XBT_PUBLIC(void*) sg_host_extension_get(sg_host_t host, size_t rank);
XBT_PUBLIC(sg_host_t) sg_host_by_name(const char *name);
XBT_PUBLIC(const char*) sg_host_get_name(sg_host_t host);