From f93d939426be2ebe0f334b157f3dad70f52ad418 Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Wed, 31 Mar 2021 21:12:33 -0700
Subject: hle: kernel: Add initial impl. of KSlabAllocated.

---
 src/core/CMakeLists.txt            |   1 +
 src/core/hle/kernel/slab_helpers.h | 152 +++++++++++++++++++++++++++++++++++++
 2 files changed, 153 insertions(+)
 create mode 100644 src/core/hle/kernel/slab_helpers.h

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 3cc5b7fbc..f5e06045f 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -234,6 +234,7 @@ add_library(core STATIC
     hle/kernel/service_thread.h
     hle/kernel/session.cpp
     hle/kernel/session.h
+    hle/kernel/slab_helpers.h
     hle/kernel/svc.cpp
     hle/kernel/svc.h
     hle/kernel/svc_common.h
diff --git a/src/core/hle/kernel/slab_helpers.h b/src/core/hle/kernel/slab_helpers.h
new file mode 100644
index 000000000..d95095da3
--- /dev/null
+++ b/src/core/hle/kernel/slab_helpers.h
@@ -0,0 +1,152 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <atomic>
+
+#include "common/assert.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "common/intrusive_red_black_tree.h"
+#include "core/hle/kernel/k_auto_object.h"
+#include "core/hle/kernel/k_auto_object_container.h"
+#include "core/hle/kernel/k_light_lock.h"
+#include "core/hle/kernel/k_slab_heap.h"
+
+namespace Kernel {
+
+template <class Derived>
+class KSlabAllocated {
+private:
+    static inline KSlabHeap<Derived> s_slab_heap;
+
+public:
+    constexpr KSlabAllocated() = default;
+
+    size_t GetSlabIndex() const {
+        return s_slab_heap.GetIndex(static_cast<const Derived*>(this));
+    }
+
+public:
+    static void InitializeSlabHeap(void* memory, size_t memory_size) {
+        s_slab_heap.Initialize(memory, memory_size);
+    }
+
+    static Derived* Allocate() {
+        return s_slab_heap.Allocate();
+    }
+
+    static void Free(Derived* obj) {
+        s_slab_heap.Free(obj);
+    }
+
+    static size_t GetObjectSize() {
+        return s_slab_heap.GetObjectSize();
+    }
+    static size_t GetSlabHeapSize() {
+        return s_slab_heap.GetSlabHeapSize();
+    }
+    static size_t GetPeakIndex() {
+        return s_slab_heap.GetPeakIndex();
+    }
+    static uintptr_t GetSlabHeapAddress() {
+        return s_slab_heap.GetSlabHeapAddress();
+    }
+
+    static size_t GetNumRemaining() {
+        return s_slab_heap.GetNumRemaining();
+    }
+};
+
+template <typename Derived, typename Base>
+class KAutoObjectWithSlabHeapAndContainer : public Base {
+    static_assert(std::is_base_of<KAutoObjectWithList, Base>::value);
+
+private:
+    static inline KSlabHeap<Derived> s_slab_heap;
+    static inline KAutoObjectWithListContainer s_container;
+
+private:
+    static Derived* Allocate() {
+        return s_slab_heap.Allocate();
+    }
+
+    static void Free(Derived* obj) {
+        s_slab_heap.Free(obj);
+    }
+
+public:
+    class ListAccessor : public KAutoObjectWithListContainer::ListAccessor {
+    public:
+        ListAccessor() : KAutoObjectWithListContainer::ListAccessor(s_container) {}
+        ~ListAccessor() = default;
+    };
+
+public:
+    constexpr KAutoObjectWithSlabHeapAndContainer() : Base() {}
+    virtual ~KAutoObjectWithSlabHeapAndContainer() {}
+
+    virtual void Destroy() override {
+        const bool is_initialized = this->IsInitialized();
+        uintptr_t arg = 0;
+        if (is_initialized) {
+            s_container.Unregister(this);
+            arg = this->GetPostDestroyArgument();
+            this->Finalize();
+        }
+        Free(static_cast<Derived*>(this));
+        if (is_initialized) {
+            Derived::PostDestroy(arg);
+        }
+    }
+
+    virtual bool IsInitialized() const {
+        return true;
+    }
+    virtual uintptr_t GetPostDestroyArgument() const {
+        return 0;
+    }
+
+    size_t GetSlabIndex() const {
+        return s_slab_heap.GetObjectIndex(static_cast<const Derived*>(this));
+    }
+
+public:
+    static void InitializeSlabHeap(void* memory, size_t memory_size) {
+        s_slab_heap.Initialize(memory, memory_size);
+        s_container.Initialize();
+    }
+
+    static Derived* Create() {
+        Derived* obj = Allocate();
+        if (AMS_LIKELY(obj != nullptr)) {
+            KAutoObject::Create(obj);
+        }
+        return obj;
+    }
+
+    static void Register(Derived* obj) {
+        return s_container.Register(obj);
+    }
+
+    static size_t GetObjectSize() {
+        return s_slab_heap.GetObjectSize();
+    }
+    static size_t GetSlabHeapSize() {
+        return s_slab_heap.GetSlabHeapSize();
+    }
+    static size_t GetPeakIndex() {
+        return s_slab_heap.GetPeakIndex();
+    }
+    static uintptr_t GetSlabHeapAddress() {
+        return s_slab_heap.GetSlabHeapAddress();
+    }
+
+    static size_t GetNumRemaining() {
+        return s_slab_heap.GetNumRemaining();
+    }
+};
+
+} // namespace Kernel
-- 
cgit v1.2.3