Improved SegmentedPool with the introduction of handles and alignment (#1)

UnmangedMMU/Allocators/DefaultUnmanagedAllocator.cs

@@ -3,14 +3,36 @@
 namespace UnmanagedMMU.Allocators
 {
     /// <summary>
-    /// Wrapper class around <see cref="NativeMemory.Alloc(nuint)"/> and <see cref="NativeMemory.Free(void*)"/>.
+    /// Wrapper class around <see cref="NativeMemory.AlignedAlloc(nuint, nuint)"/> and <see cref="NativeMemory.AlignedFree(void*)"/>.
     /// </summary>
     internal sealed unsafe class DefaultUnmanagedAllocator : IUnmanagedAllocator
     {
         /// <inheritdoc/>
-        public void* Alloc(nuint size) => NativeMemory.Alloc(size);
+        public void* Alloc(nuint size)
+        {
+            return NativeMemory.AlignedAlloc(size, 16);
+        }
 
         /// <inheritdoc/>
-        public void Free(void* ptr) => NativeMemory.Free(ptr);
+        public void* AllocAligned(nuint size, nuint alignment)
+        {
+            if (!((alignment & (alignment - 1)) == 0 && alignment > 0))
+            {
+                throw new ArgumentException("Alignment must be a power of 2.", nameof(alignment));
+            }
+            return NativeMemory.AlignedAlloc(size, alignment);
+        }
+
+        /// <inheritdoc/>
+        public void Free(void* ptr)
+        {
+            NativeMemory.Free(ptr);
+        }
+
+        /// <inheritdoc/>
+        public void FreeAligned(void* ptr, nuint alignment = 0)
+        {
+            NativeMemory.AlignedFree(ptr);
+        }
     }
 }