Libwalletqt: integrate changes from upstream

Co-authored-by: xiphon <xiphon@protonmail.com>

src/utils/scheduler.cpp

@@ -68,6 +68,11 @@ QPair<bool, QFuture<void>> FutureScheduler::run(std::function<void()> function)
 //    });
 //}
 
+bool FutureScheduler::stopping() const noexcept
+{
+    return Stopping;
+}
+
 bool FutureScheduler::add() noexcept
 {
     QMutexLocker locker(&Mutex);

src/utils/scheduler.h

@@ -26,6 +26,7 @@ public:
 
     QPair<bool, QFuture<void>> run(std::function<void()> function) noexcept;
    // QPair<bool, QFuture<QJSValueList>> run(std::function<QJSValueList()> function, const QJSValue &callback);
+   bool stopping() const noexcept;
 
 private:
     bool add() noexcept;
@@ -62,7 +63,7 @@ private:
     size_t Alive;
     QWaitCondition Condition;
     QMutex Mutex;
-    bool Stopping;
+    std::atomic<bool> Stopping;
 };
 
 #endif // FUTURE_SCHEDULER_H