refactor: use atomic to notify if js is ready

Author: std-microblock

src/shell/entry.cc

@@ -182,7 +182,7 @@ void main() {
         init_render_global();
         ShowWindow(GetConsoleWindow(), SW_SHOW);
         std::thread([]() {
-            script_ctx.js_ready_future.wait();
+            script_ctx.is_js_ready.wait(true);
             script_ctx.js->enqueueJob([]() {
                 script_ctx.js->eval("globalThis.showConfigPage()", "asan.js");
             });

src/shell/script/script.cc

@@ -122,6 +122,7 @@ void script_context::watch_folder(const std::filesystem::path &path,
         dbgout("Creating JS thread");
         menu_callbacks_js.clear();
 
+        is_js_ready.exchange(false);
         js_thread.emplace(
             [&, this, ss = stop_signal]() {
                 CPPTRACE_TRY {
@@ -131,7 +132,8 @@ void script_context::watch_folder(const std::filesystem::path &path,
                     rt = std::make_shared<qjs::Runtime>();
                     JS_UpdateStackTop(rt->rt);
                     js = std::make_shared<qjs::Context>(*rt);
-                    js_ready_promise.set_value();
+
+                    is_js_ready.exchange(true);
                     bind();
                     try {
                         JS_UpdateStackTop(rt->rt);

src/shell/script/script.h

@@ -16,11 +16,9 @@ struct script_context {
     std::shared_ptr<qjs::Runtime> rt;
     std::shared_ptr<qjs::Context> js;
 
-private:
-    std::promise<void> js_ready_promise{};
 
 public:
-    std::future<void> js_ready_future = js_ready_promise.get_future();
+    std::atomic<bool> is_js_ready{false};
 
     std::shared_ptr<int> stop_signal = std::make_shared<int>(0);
     script_context();