video_core: Add a delayed destruction ring abstraction

src/video_core/CMakeLists.txt

@@ -25,6 +25,7 @@ add_library(video_core STATIC
     command_classes/vic.h
     compatible_formats.cpp
     compatible_formats.h
+    delayed_destruction_ring.h
     dirty_flags.cpp
     dirty_flags.h
     dma_pusher.cpp

src/video_core/delayed_destruction_ring.h

+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <cstddef>
+#include <utility>
+#include <vector>
+
+namespace VideoCommon {
+
+/// Container to push objects to be destroyed a few ticks in the future
+template <typename T, size_t TICKS_TO_DESTROY>
+class DelayedDestructionRing {
+public:
+    void Tick() {
+        index = (index + 1) % TICKS_TO_DESTROY;
+        elements[index].clear();
+    }
+
+    void Push(T&& object) {
+        elements[index].push_back(std::move(object));
+    }
+
+private:
+    size_t index = 0;
+    std::array<std::vector<T>, TICKS_TO_DESTROY> elements;
+};
+
+} // namespace VideoCommon