Minor code refactoring

Author: Sergio0694

NeuralNetwork.NET/DependencyInjections/LibraryRuntimeHelper.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Linq;
+using JetBrains.Annotations;
+
+namespace NeuralNetworkNET.Helpers
+{
+    /// <summary>
+    /// A shared event with an <see cref="Action"/> <see cref="delegate"/> as its handler
+    /// </summary>
+    internal sealed class SharedEvent
+    {
+        // The backing delegate
+        [CanBeNull]
+        private Action _InvocationList;
+
+        /// <summary>
+        /// Adds the input <see cref="Action"/> to the list of handlers
+        /// </summary>
+        /// <param name="action">The <see cref="Action"/> to add</param>
+        public void Add(Action action)
+        {
+            if (_InvocationList?.GetInvocationList().Contains(action) == true) return;
+            _InvocationList += action;
+        }
+
+        /// <summary>
+        /// Removes the input <see cref="Action"/> from the list of handlers
+        /// </summary>
+        /// <param name="action">The <see cref="Action"/> to remove</param>
+        public void Remove(Action action) => Delegate.Remove(_InvocationList, action);
+
+        /// <summary>
+        /// Raises the shared event
+        /// </summary>
+        public void Raise() => _InvocationList?.Invoke();
+    }
+}

NeuralNetwork.NET/Helpers/SharedEvent.cs

@@ -3,7 +3,6 @@
 using NeuralNetworkNET.APIs.Enums;
 using NeuralNetworkNET.APIs.Results;
 using NeuralNetworkNET.APIs.Structs;
-using NeuralNetworkNET.DependencyInjections;
 using NeuralNetworkNET.Extensions;
 using NeuralNetworkNET.SupervisedLearning.Algorithms.Info;
 using NeuralNetworkNET.SupervisedLearning.Data;
@@ -15,6 +14,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 using NeuralNetworkNET.Networks.Layers.Abstract;
+using NeuralNetworkNET.Services;
 
 namespace NeuralNetworkNET.Networks.Implementations
 {
@@ -47,7 +47,7 @@ public static TrainingSessionResult TrainNetwork(
             [CanBeNull] TestParameters testParameters,
             CancellationToken token)
         {
-            LibraryRuntimeHelper.SynchronizeContext?.Invoke();
+            SharedEventsService.TrainingStarting.Raise();
             switch (algorithm)
             {
                 case StochasticGradientDescentInfo sgd:

NeuralNetwork.NET/Networks/Implementations/NetworkTrainer.cs

@@ -6,10 +6,10 @@
 using NeuralNetworkNET.APIs.Interfaces;
 using NeuralNetworkNET.APIs.Structs;
 using NeuralNetworkNET.Extensions;
-using NeuralNetworkNET.Helpers;
 using NeuralNetworkNET.Networks.Activations;
 using NeuralNetworkNET.Networks.Activations.Delegates;
 using NeuralNetworkNET.Networks.Layers.Cpu;
+using NeuralNetworkNET.Services;
 
 namespace NeuralNetworkNET.Networks.Layers.Cuda
 {

NeuralNetwork.NET/Networks/Layers/Cuda/CuDnnConvolutionalLayer.cs

@@ -5,10 +5,10 @@
 using NeuralNetworkNET.APIs.Interfaces;
 using NeuralNetworkNET.APIs.Structs;
 using NeuralNetworkNET.Extensions;
-using NeuralNetworkNET.Helpers;
 using NeuralNetworkNET.Networks.Activations;
 using NeuralNetworkNET.Networks.Activations.Delegates;
 using NeuralNetworkNET.Networks.Layers.Cpu;
+using NeuralNetworkNET.Services;
 
 namespace NeuralNetworkNET.Networks.Layers.Cuda
 {

NeuralNetwork.NET/Networks/Layers/Cuda/CuDnnFullyConnectedLayer.cs

@@ -7,11 +7,11 @@
 using NeuralNetworkNET.APIs.Interfaces;
 using NeuralNetworkNET.APIs.Structs;
 using NeuralNetworkNET.Extensions;
-using NeuralNetworkNET.Helpers;
 using NeuralNetworkNET.Networks.Activations;
 using NeuralNetworkNET.Networks.Activations.Delegates;
 using NeuralNetworkNET.Networks.Layers.Abstract;
 using NeuralNetworkNET.Networks.Layers.Initialization;
+using NeuralNetworkNET.Services;
 
 namespace NeuralNetworkNET.Networks.Layers.Cuda
 {

NeuralNetwork.NET/Networks/Layers/Cuda/CuDnnInceptionLayer.cs

@@ -5,10 +5,10 @@
 using NeuralNetworkNET.APIs.Interfaces;
 using NeuralNetworkNET.APIs.Structs;
 using NeuralNetworkNET.Extensions;
-using NeuralNetworkNET.Helpers;
 using NeuralNetworkNET.Networks.Activations;
 using NeuralNetworkNET.Networks.Activations.Delegates;
 using NeuralNetworkNET.Networks.Layers.Cpu;
+using NeuralNetworkNET.Services;
 using Newtonsoft.Json;
 
 namespace NeuralNetworkNET.Networks.Layers.Cuda

NeuralNetwork.NET/Networks/Layers/Cuda/CuDnnPoolingLayer.cs

@@ -5,10 +5,10 @@
 using NeuralNetworkNET.APIs.Interfaces;
 using NeuralNetworkNET.APIs.Structs;
 using NeuralNetworkNET.Extensions;
-using NeuralNetworkNET.Helpers;
 using NeuralNetworkNET.Networks.Activations;
 using NeuralNetworkNET.Networks.Cost;
 using NeuralNetworkNET.Networks.Layers.Cpu;
+using NeuralNetworkNET.Services;
 
 namespace NeuralNetworkNET.Networks.Layers.Cuda
 {

NeuralNetwork.NET/Networks/Layers/Cuda/CuDnnSoftmaxLayer.cs

@@ -3,9 +3,8 @@
 using Alea;
 using Alea.cuDNN;
 using JetBrains.Annotations;
-using NeuralNetworkNET.DependencyInjections;
 
-namespace NeuralNetworkNET.Helpers
+namespace NeuralNetworkNET.Services
 {
     /// <summary>
     /// A static class that handles a shared, disposable instance of the <see cref="Dnn"/> class
@@ -53,7 +52,7 @@ public static Dnn Instance
                     if (DnnReference.TryGetTarget(out Dnn dnn) && dnn != null) return dnn;
                     dnn = Dnn.Get(Gpu.Default);
                     DnnReference.SetTarget(dnn);
-                    LibraryRuntimeHelper.SynchronizeContext = SynchronizeDnnContext;
+                    SharedEventsService.TrainingStarting.Add(SynchronizeDnnContext);
                     return dnn;
                 }
             }

NeuralNetwork.NET/Helpers/DnnService.cs renamed to NeuralNetwork.NET/Services/DnnService.cs

@@ -0,0 +1,17 @@
+using JetBrains.Annotations;
+using NeuralNetworkNET.Helpers;
+
+namespace NeuralNetworkNET.Services
+{
+    /// <summary>
+    /// A static class with events that signal different status changes for the library
+    /// </summary>
+    internal static class SharedEventsService
+    {
+        /// <summary>
+        /// An <see cref="System.Action"/> that is executed right before the training starts on a network
+        /// </summary>
+        [NotNull]
+        public static readonly SharedEvent TrainingStarting = new SharedEvent();
+    }
+}