Added unique

Assets/Pacore/Runtime/MemUtil.meta

@@ -0,0 +1,8 @@
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Assets/Pacore/Runtime/MemUtil/Unique.cs

@@ -0,0 +1,82 @@
+using Unity.Collections.LowLevel.Unsafe;
+using System.Runtime.CompilerServices;
+using System.Diagnostics;
+using Unity.Collections;
+using System;
+
+namespace PashaBibko.Pacore.MemUtil
+{
+    public unsafe struct Unique<T> : IDisposable
+        where T : unmanaged
+    {
+        private T* mPtr;
+
+        public bool IsValid
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => mPtr != null;
+        }
+
+        public T Value
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                DebugOnly_CheckValid();
+                return *mPtr;
+            }
+
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            set
+            {
+                DebugOnly_CheckValid();
+                *mPtr = value;
+            }
+        }
+
+        public ref T Ref
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                DebugOnly_CheckValid();
+                return ref *mPtr;
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Unique<T> Create(T val = default)
+        {
+            T* ptr = (T*)UnsafeUtility.Malloc
+            (
+                sizeof(T),
+                UnsafeUtility.SizeOf<T>(),
+                Allocator.Persistent
+            );
+            *ptr = val;
+
+            return new Unique<T> { mPtr = ptr };
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Dispose()
+        {
+            if (IsValid)
+            {
+                UnsafeUtility.Free(mPtr, Allocator.Persistent);
+            }
+        }
+
+        [Conditional("UNITY_EDITOR")]
+        private void DebugOnly_CheckValid()
+        {
+            if (!IsValid)
+            {
+                throw new InvalidOperationException
+                (
+                    $"Owned<{nameof(T)}> was expected to be valid."
+                );
+            }
+        }
+    }
+}

Assets/Pacore/Runtime/MemUtil/Unique.cs.meta

@@ -0,0 +1,11 @@
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Assets/Pacore/Runtime/Pacore.asmdef

@@ -4,7 +4,7 @@
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     "includePlatforms": [],
     "excludePlatforms": [],
-    "allowUnsafeCode": false,
+    "allowUnsafeCode": true,
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     "autoReferenced": true,