1 files changed, 100 insertions, 0 deletions
diff --git a/Ryujinx.Ava/Ui/Controls/RenderTimer.cs b/Ryujinx.Ava/Ui/Controls/RenderTimer.cs
new file mode 100644
index 00000000..577115ea
--- /dev/null
+++ b/Ryujinx.Ava/Ui/Controls/RenderTimer.cs
@@ -0,0 +1,100 @@
+using Avalonia.Rendering;
+using System;
+using System.Threading;
+using System.Timers;
+
+namespace Ryujinx.Ava.Ui.Controls
+{
+    internal class RenderTimer : IRenderTimer, IDisposable
+    {
+        public event Action<TimeSpan> Tick
+        {
+            add
+            {
+                _tick += value;
+
+                if (_subscriberCount++ == 0)
+                {
+                    Start();
+                }
+            }
+
+            remove
+            {
+                if (--_subscriberCount == 0)
+                {
+                    Stop();
+                }
+
+                _tick -= value;
+            }
+        }
+
+        private Thread _tickThread;
+        private readonly System.Timers.Timer _timer;
+
+        private Action<TimeSpan> _tick;
+        private int _subscriberCount;
+
+        private bool _isRunning;
+
+        private AutoResetEvent _resetEvent;
+
+        public RenderTimer()
+        {
+            _timer = new System.Timers.Timer(15);
+            _resetEvent = new AutoResetEvent(true);
+            _timer.Elapsed += Timer_Elapsed;
+        }
+
+        private void Timer_Elapsed(object sender, ElapsedEventArgs e)
+        {
+            TickNow();
+        }
+
+        public void Start()
+        {
+            _timer.Start();
+            if (_tickThread == null)
+            {
+                _tickThread = new Thread(RunTick);
+                _tickThread.Name = "RenderTimerTickThread";
+                _tickThread.IsBackground = true;
+                _isRunning = true;
+                _tickThread.Start();
+            }
+        }
+
+        public void RunTick()
+        {
+            while (_isRunning)
+            {
+                _resetEvent.WaitOne();
+                _tick?.Invoke(TimeSpan.FromMilliseconds(Environment.TickCount));
+            }
+        }
+
+        public void TickNow()
+        {
+            lock (_timer)
+            {
+                _resetEvent.Set();
+            }
+        }
+
+        public void Stop()
+        {
+            _timer.Stop();
+        }
+
+        public void Dispose()
+        {
+            _timer.Elapsed -= Timer_Elapsed;
+            _timer.Stop();
+            _isRunning = false;
+            _resetEvent.Set();
+            _tickThread.Join();
+            _resetEvent.Dispose();
+        }
+    }
+}