initial commit

Library/PackageCache/com.unity.subsystemregistration@1.1.0/Runtime/SubsystemRegistration.cs

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+using System.Collections.Generic;
+
+#if !UNITY_2019_2_OR_NEWER
+using UnityEngine.Experimental;
+#endif
+
+#pragma warning disable CS0618
+namespace UnityEngine
+{
+    public static class SubsystemRegistration
+    {
+        static readonly List<SubsystemDescriptor> k_SubsystemDescriptors = new List<SubsystemDescriptor>();
+
+        /// <summary>
+        /// Registers a <c>SubsystemDescriptor</c> with the Subsystem Manager so that features and implementation type are available.
+        /// </summary>
+        /// <param name="descriptor"> The <c>SubsystemDescriptor</c> that describes the subsystem implementation.</param>
+        /// <returns><c>True</c> if the descriptor does not already exist and registration happens, otherwise, <c>False</c>.</returns>
+        public static bool CreateDescriptor(SubsystemDescriptor descriptor)
+        {
+			
+            foreach (var declaration in k_SubsystemDescriptors)
+            {
+                if (descriptor.subsystemImplementationType == declaration.subsystemImplementationType)
+                    return false;
+            }
+
+            Internal_SubsystemDescriptors.Internal_AddDescriptor(descriptor);
+            k_SubsystemDescriptors.Add(descriptor);
+
+            return true;
+        }
+    }
+}
+#pragma warning restore CS0618

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Library/PackageCache/com.unity.subsystemregistration@1.1.0/Runtime/Unity.Subsystem.Registration.asmdef

@@ -0,0 +1,8 @@
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+    "excludePlatforms": [],
+    "allowUnsafeCode": false
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