3 files changed, 109 insertions, 0 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index aa83b8733..3cc5b7fbc 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -163,6 +163,8 @@ add_library(core STATIC
     hle/kernel/k_address_space_info.h
     hle/kernel/k_auto_object.cpp
     hle/kernel/k_auto_object.h
+    hle/kernel/k_auto_object_container.cpp
+    hle/kernel/k_auto_object_container.h
     hle/kernel/k_affinity_mask.h
     hle/kernel/k_condition_variable.cpp
     hle/kernel/k_condition_variable.h
diff --git a/src/core/hle/kernel/k_auto_object_container.cpp b/src/core/hle/kernel/k_auto_object_container.cpp
new file mode 100644
index 000000000..9ba8a54c7
--- /dev/null
+++ b/src/core/hle/kernel/k_auto_object_container.cpp
@@ -0,0 +1,35 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/kernel/k_auto_object_container.h"
+
+namespace Kernel {
+
+void KAutoObjectWithListContainer::Register(KAutoObjectWithList* obj) {
+    KScopedLightLock lk(m_lock);
+
+    m_object_list.insert(*obj);
+}
+
+void KAutoObjectWithListContainer::Unregister(KAutoObjectWithList* obj) {
+    KScopedLightLock lk(m_lock);
+
+    m_object_list.erase(m_object_list.iterator_to(*obj));
+}
+
+size_t KAutoObjectWithListContainer::GetOwnedCount(Process* owner) {
+    KScopedLightLock lk(m_lock);
+
+    size_t count = 0;
+
+    for (auto& obj : m_object_list) {
+        if (obj.GetOwner() == owner) {
+            count++;
+        }
+    }
+
+    return count;
+}
+
+} // namespace Kernel
diff --git a/src/core/hle/kernel/k_auto_object_container.h b/src/core/hle/kernel/k_auto_object_container.h
new file mode 100644
index 000000000..4b599b7c3
--- /dev/null
+++ b/src/core/hle/kernel/k_auto_object_container.h
@@ -0,0 +1,72 @@
+// 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_light_lock.h"
+
+namespace Kernel {
+
+class KernelCore;
+class Process;
+
+class KAutoObjectWithListContainer {
+    NON_COPYABLE(KAutoObjectWithListContainer);
+    NON_MOVEABLE(KAutoObjectWithListContainer);
+
+public:
+    using ListType = Common::IntrusiveRedBlackTreeMemberTraits<
+        &KAutoObjectWithList::list_node>::TreeType<KAutoObjectWithList>;
+
+public:
+    class ListAccessor : public KScopedLightLock {
+    private:
+        ListType& m_list;
+
+    public:
+        explicit ListAccessor(KAutoObjectWithListContainer* container)
+            : KScopedLightLock(container->m_lock), m_list(container->m_object_list) { /* ... */
+        }
+        explicit ListAccessor(KAutoObjectWithListContainer& container)
+            : KScopedLightLock(container.m_lock), m_list(container.m_object_list) { /* ... */
+        }
+
+        typename ListType::iterator begin() const {
+            return m_list.begin();
+        }
+
+        typename ListType::iterator end() const {
+            return m_list.end();
+        }
+
+        typename ListType::iterator find(typename ListType::const_reference ref) const {
+            return m_list.find(ref);
+        }
+    };
+
+    friend class ListAccessor;
+
+private:
+    KLightLock m_lock;
+    ListType m_object_list;
+
+public:
+    KAutoObjectWithListContainer(KernelCore& kernel) : m_lock(kernel), m_object_list() {}
+
+    void Initialize() {}
+    void Finalize() {}
+
+    void Register(KAutoObjectWithList* obj);
+    void Unregister(KAutoObjectWithList* obj);
+    size_t GetOwnedCount(Process* owner);
+};
+
+} // namespace Kernel