wasm: do not try to resume main thread if mainloop has not started yet

(cherry picked from commit d928beb) Fixes: QTBUG-83293 Change-Id: Ibd891629d1d023e47d196dd60821cc5c583a178d Reviewed-by: Morten Johan Sørvig <[email protected]>
liunan9527 · Apr 14, 2020 · c034089 · c034089
1 parent 6e05914
commit c034089
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/plugins/platforms/wasm/qwasmeventdispatcher.cpp b/src/plugins/platforms/wasm/qwasmeventdispatcher.cpp
@@ -194,7 +194,8 @@ void QWasmEventDispatcher::wakeUp()
 {
 #ifdef EMSCRIPTEN_HAS_ASYNC_RUN_IN_MAIN_RUNTIME_THREAD
     if (!emscripten_is_main_runtime_thread())
-        emscripten_async_run_in_main_runtime_thread_(EM_FUNC_SIG_VI, (void*)(&QWasmEventDispatcher::mainThreadWakeUp), this);
+        if (m_hasMainLoop)
+            emscripten_async_run_in_main_runtime_thread_(EM_FUNC_SIG_VI, (void*)(&QWasmEventDispatcher::mainThreadWakeUp), this);
 #endif
     QEventDispatcherUNIX::wakeUp();
 }