in src/transport/xqc_engine.c [804:812]
void xqc_engine_main_logic_internal(xqc_engine_t *engine) {
if (engine->eng_flag & XQC_ENG_FLAG_NO_DESTROY) {
return;
}
engine->eng_flag |= XQC_ENG_FLAG_NO_DESTROY;
xqc_engine_main_logic(engine);
engine->eng_flag &= ~XQC_ENG_FLAG_NO_DESTROY;
}