Merge pull request #91 from drittich/prevent-multiple-app-instances

Prevent multiple tray app instances from running
jellyfin · Sep 24, 2023 · 2b0e1d8 · 2b0e1d8
2 parents dee4b67 + d2aebb5
commit 2b0e1d8
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/Jellyfin.Windows.Tray/Program.cs b/Jellyfin.Windows.Tray/Program.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Threading;
 using System.Windows.Forms;
 
 namespace Jellyfin.Windows.Tray
@@ -8,9 +9,17 @@ namespace Jellyfin.Windows.Tray
     /// </summary>
     public static class Program
     {
+        private static Mutex _mutex;
+
         [STAThread]
         private static void Main()
         {
+            if (IsAlreadyRunning())
+            {
+                MessageBox.Show("The Jellyfin tray application is already running.", "Info", new MessageBoxButtons { }, MessageBoxIcon.Information);
+                Environment.Exit(1);
+            }
+
             Application.EnableVisualStyles();
             Application.SetCompatibleTextRenderingDefault(false);
 
@@ -20,5 +29,12 @@ private static void Main()
                 Application.Run(trayApplicationContext);
             }
         }
+
+        private static bool IsAlreadyRunning()
+        {
+            _mutex = new Mutex(true, "Jellyfin.Windows.Tray", out bool createdNew);
+
+            return !createdNew;
+        }
     }
 }