Metal: Buffers Take 2 (#21)

* Basic BufferManager

* Start Scoped Command Buffers

* Fences stuff

* Remember to cleanup sync manager

* Auto, Command Buffer Dependants

* Cleanup

* Cleanup + Fix Texture->Buffer Copies

* Slow buffer upload

* Cleanup + Rework TextureBuffer

* Don’t get unsafe

* Cleanup

* Goddamn it

* Staging Buffer + Interrupt Action + Flush

src/Ryujinx.Graphics.Metal/CommandBufferScoped.cs

@@ -0,0 +1,41 @@
+using SharpMetal.Metal;
+using System;
+using System.Runtime.Versioning;
+
+namespace Ryujinx.Graphics.Metal
+{
+    [SupportedOSPlatform("macos")]
+    public readonly struct CommandBufferScoped : IDisposable
+    {
+        private readonly CommandBufferPool _pool;
+        public MTLCommandBuffer CommandBuffer { get; }
+        public int CommandBufferIndex { get; }
+
+        public CommandBufferScoped(CommandBufferPool pool, MTLCommandBuffer commandBuffer, int commandBufferIndex)
+        {
+            _pool = pool;
+            CommandBuffer = commandBuffer;
+            CommandBufferIndex = commandBufferIndex;
+        }
+
+        public void AddDependant(IAuto dependant)
+        {
+            _pool.AddDependant(CommandBufferIndex, dependant);
+        }
+
+        public void AddWaitable(MultiFenceHolder waitable)
+        {
+            _pool.AddWaitable(CommandBufferIndex, waitable);
+        }
+
+        public FenceHolder GetFence()
+        {
+            return _pool.GetFence(CommandBufferIndex);
+        }
+
+        public void Dispose()
+        {
+            _pool?.Return(this);
+        }
+    }
+}