[CHANGE] Service extended and events

Manager.App/Services/CircularBuffer.cs

@@ -6,6 +6,7 @@ public class CircularBuffer <T>
 {
     private readonly T[] _buffer;
     private readonly Channel<T> _channel;
+    private readonly object _lock = new();
 
     public int Capacity { get; }
     public int Head { get; private set; }
@@ -30,14 +31,17 @@ public class CircularBuffer <T>
 
     public void Add(T item)
     {
-        _buffer[Head] = item;
-        Head = (Head + 1) % _buffer.Length;
-
-        if (Count < _buffer.Length)
+        lock (_lock)
         {
-            Count++;
+            _buffer[Head] = item;
+            Head = (Head + 1) % _buffer.Length;
+
+            if (Count < _buffer.Length)
+            {
+                Count++;
+            }
         }
-        
+
         _channel.Writer.TryWrite(item);
     }
 
@@ -47,7 +51,10 @@ public class CircularBuffer <T>
         {
             for (var i = 0; i < Count; i++)
             {
-                yield return _buffer[(Head - Count + i + _buffer.Length) % _buffer.Length];
+                lock (_lock)
+                {
+                    yield return _buffer[(Head - Count + i + _buffer.Length) % _buffer.Length];
+                }
             }
         }
     }