vk_resource_manager: Add VKResource interface

VKResource is an interface that gets signaled by a fence when it is free
to be reused.

src/video_core/CMakeLists.txt

@@ -105,7 +105,9 @@ if (ENABLE_VULKAN)
     target_sources(video_core PRIVATE
         renderer_vulkan/declarations.h
         renderer_vulkan/vk_device.cpp
-        renderer_vulkan/vk_device.h)
+        renderer_vulkan/vk_device.h
+        renderer_vulkan/vk_resource_manager.cpp
+        renderer_vulkan/vk_resource_manager.h)
 
     target_include_directories(video_core PRIVATE ../../externals/Vulkan-Headers/include)
     target_compile_definitions(video_core PRIVATE HAS_VULKAN)

src/video_core/renderer_vulkan/vk_resource_manager.cpp

@@ -0,0 +1,14 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "video_core/renderer_vulkan/declarations.h"
+#include "video_core/renderer_vulkan/vk_resource_manager.h"
+
+namespace Vulkan {
+
+VKResource::VKResource() = default;
+
+VKResource::~VKResource() = default;
+
+} // namespace Vulkan

src/video_core/renderer_vulkan/vk_resource_manager.h

@@ -0,0 +1,26 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "video_core/renderer_vulkan/declarations.h"
+
+namespace Vulkan {
+
+class VKFence;
+
+/// Interface for a Vulkan resource
+class VKResource {
+public:
+    explicit VKResource();
+    virtual ~VKResource();
+
+    /**
+     * Signals the object that an owning fence has been signaled.
+     * @param signaling_fence Fence that signals its usage end.
+     */
+    virtual void OnFenceRemoval(VKFence* signaling_fence) = 0;
+};
+
+} // namespace Vulkan