From 5c8c1509c879d049173ee11811f76f418606b450 Mon Sep 17 00:00:00 2001
From: Hane <inupwd@gmail.com>
Date: Thu, 24 Aug 2023 20:23:24 +0200
Subject: [PATCH] poc prevent duplicate instances

---
 qtest.pro         |  2 +-
 src/qtestmain.cpp | 25 ++++++++++++++++++++++++-
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/qtest.pro b/qtest.pro
index c96012e..8e3d0d0 100644
--- a/qtest.pro
+++ b/qtest.pro
@@ -5,7 +5,7 @@ QMAKE_LFLAGS += --target=x86_64-w64-mingw32 -g -Wl,-pdb= -v
 DEFINES += DEBUG
 CONFIG += debug console
 
-QT += widgets
+QT += widgets network
 INCLUDEPATH += "$$PWD\src" "$$PWD\src\qt" "$$PWD\src\back" "$$PWD\src\cont"
 DESTPATH += "$$PWD\src" "$$PWD\src\qt" "$$PWD\src\back" "$$PWD\src\cont"
 VPATH += "$$PWD\src" "$$PWD\src\qt" "$$PWD\src\back" "$$PWD\src\cont"
diff --git a/src/qtestmain.cpp b/src/qtestmain.cpp
index 22d5e9f..3b37996 100644
--- a/src/qtestmain.cpp
+++ b/src/qtestmain.cpp
@@ -5,8 +5,11 @@
 
 //#define QTBLESSED
 #include <QApplication>
-#include <QMainWindow> 
+#include <QMainWindow>
 
+#include <QLocalSocket>
+#include <QLocalServer>
+#include <QString>
 //#include "contclasses.h"
 #include "qtclasses.h"
 #include "global.h"
@@ -18,9 +21,29 @@ QApplication* createApplication(int &argc, char *argv[])
     return new QApplication(argc, argv);
 }
 
+bool isSingleInstanceRunning(QString appName) {
+    QLocalSocket socket;
+    socket.connectToServer(appName);
+    bool isOpen = socket.isOpen();
+    socket.close();
+    return isOpen;
+}
+
+QLocalServer* startSingleInstanceServer(QString appName) {
+    QLocalServer* server = new QLocalServer;
+    server->setSocketOptions(QLocalServer::WorldAccessOption);
+    server->listen(appName);
+	return server;
+}
 
 int main (int argc, char* argv[]) {
 	//QApplication::setStyle("windowsvista");
+	//Check if running
+	//https://stackoverflow.com/questions/48060989/qt-show-application-if-currently-running
+	if (!isSingleInstanceRunning("Mixer"))
+		startSingleInstanceServer("Mixer");
+	else exit(0);
+
 	//INIT CONT
 	log_debugcpp("main init");
 	osh->reloadEndpointHandlers();