From 0a338945f3132116b62672a13e3a326b34686aba Mon Sep 17 00:00:00 2001
From: Roland Winklmeier <Roland.M.Winklmeier@gmail.com>
Date: Sat, 26 Jul 2014 18:50:47 +0200
Subject: [PATCH] refs #241 Callback wrapper, wrapping a C style callback to
 member function

---
 src/plugins/simulator/fs9/callback_wrapper.h | 52 ++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/plugins/simulator/fs9/callback_wrapper.h

diff --git a/src/plugins/simulator/fs9/callback_wrapper.h b/src/plugins/simulator/fs9/callback_wrapper.h
new file mode 100644
index 000000000..3b0f74bdb
--- /dev/null
+++ b/src/plugins/simulator/fs9/callback_wrapper.h
@@ -0,0 +1,52 @@
+/* Copyright (C) 2014
+ * swift project community / contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of Swift Project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#ifndef BLACKSIMPLUGIN_FS9_CALLBACK_WRAPPER_H
+#define BLACKSIMPLUGIN_FS9_CALLBACK_WRAPPER_H
+
+#include <QObject>
+#include <QPointer>
+#include <dplay8.h>
+#include <functional>
+
+namespace BlackSimPlugin
+{
+    namespace Fs9
+    {
+        //! Template, wrapping the C-style DirectPlay handler callback to a class member
+        template <class Object, class ReturnType, class Argument1, class Argument2>
+        struct CallbackWrapper
+        {
+            //! Typedef to a MemberFunction
+            typedef ReturnType (Object::*MemberFunction)(Argument1, Argument2);
+
+            //! Constructor
+            CallbackWrapper(Object *obj, MemberFunction memberFunction) :
+                m_object(obj), m_memberFunction(memberFunction)
+            {}
+
+            //! FS9 message handler callback
+            static ReturnType WINAPI messageHandler(void *userContext, Argument1 arg1, Argument2 arg2)
+            {
+                CallbackWrapper *_this = static_cast<CallbackWrapper *>(userContext);
+                Object *obj = _this->m_object;
+                MemberFunction func = _this->m_memberFunction;
+                ReturnType result = (obj->*func)(arg1, arg2);
+                return result;
+            }
+
+        private:
+
+            QPointer<Object> m_object;
+            MemberFunction m_memberFunction;
+        };
+    }
+}
+
+#endif //BLACKSIMPLUGIN_FS9_CALLBACK_WRAPPER_H