From 39dc9e84a5b2b8fa8a62abf370c971898695ad4a Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Sun, 14 Dec 2014 11:54:38 +0100
Subject: Threaded query processing.

---
 client/threadboundary.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 client/threadboundary.h

(limited to 'client/threadboundary.h')

diff --git a/client/threadboundary.h b/client/threadboundary.h
new file mode 100644
index 0000000..8847849
--- /dev/null
+++ b/client/threadboundary.h
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <QObject>
+#include <functional>
+
+namespace async {
+    /*
+     * A helper class to invoke a method in a different thread using the event loop.
+     * The ThreadBoundary object must live in the thread where the function should be called.
+     */
+    class ThreadBoundary : public QObject {
+        Q_OBJECT
+    public:
+        ThreadBoundary();
+        virtual ~ThreadBoundary();
+
+        //Call in worker thread
+        void callInMainThread(std::function<void()> f) {
+            QMetaObject::invokeMethod(this, "addValueInMainThread", Qt::QueuedConnection, QGenericReturnArgument(), Q_ARG(std::function<void()>, f));
+        }
+    public slots:
+        //Get's called in main thread by it's eventloop
+        void addValueInMainThread(std::function<void()> f) {
+            f();
+        }
+    };
+}
-- 
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