difference between stop_request and quit_request

quit_request is for internal use. This means the IP register was updated and
qemu needs to rebuild the translation blocks.

stop_request is set by the user (uc_emu_stop) to indecate that unicorn sould
stop emulating.

uc.c

@@ -907,19 +907,8 @@ UNICORN_EXPORT
 uc_err uc_emu_stop(uc_engine *uc)
 {
     UC_INIT(uc);
-
-    if (uc->emulation_done) {
-        return UC_ERR_OK;
-    }
-
     uc->stop_request = true;
-    // TODO: make this atomic somehow?
-    if (uc->cpu) {
-        // exit the current TB
-        cpu_exit(uc->cpu);
-    }
-
-    return UC_ERR_OK;
+    return break_translation_loop(uc);
 }
 
 // return target index where a memory region at the address exists, or could be