Put thread pool to individual type define as thread resource manager.

StgSharp.Mathematics/Numeric/MatrixParallelWrap.cs

@@ -45,6 +45,7 @@ namespace StgSharp.Mathematics.Numeric
         {
             ID = id;
             _threads = new Thread[wrapSize];
+            _resetHandle = new Handle[wrapSize];
             for (int i = 0; i < wrapSize; i++)
             {
                 _threads[i] = new Thread(MatrixParallelWorker)
@@ -53,7 +54,23 @@ namespace StgSharp.Mathematics.Numeric
                     Priority = ThreadPriority.BelowNormal,
                     Name = $"MPT#{ID}_{i}"
                 };
-                _threads[i].Start(new Handle(i, this));
+                Handle handle = new Handle(i, this);
+                _resetHandle[i] = handle;
+                _threads[i].Start(handle);
+            }
+        }
+
+        public bool IsAllAvailable
+        {
+            get
+            {
+                foreach (Handle item in _resetHandle)
+                {
+                    if (item.Role != 0) {
+                        return false;
+                    }
+                }
+                return true;
             }
         }
 
@@ -75,6 +92,21 @@ namespace StgSharp.Mathematics.Numeric
             }
         }
 
+        internal bool TryGetLeaderHandle(out Handle? handle)
+        {
+            foreach (Handle item in _resetHandle)
+            {
+                if (item.Role != 2)
+                {
+                    handle = item;
+                    item.Role = 2;
+                    return true;
+                }
+            }
+            handle = null;
+            return false;
+        }
+
         public class Handle(int inWrapIndex, MatrixParallelWrap wrap)
         {