hle: kernel: Migrate KEvent to KAutoObject.

src/core/hle/kernel/handle_table.cpp

@@ -53,6 +53,7 @@ ResultVal<Handle> HandleTable::Create(Object* obj) {
     switch (obj->GetHandleType()) {
     case HandleType::SharedMemory:
     case HandleType::Thread:
+    case HandleType::Event:
     case HandleType::Process: {
         Handle handle{};
         Add(&handle, reinterpret_cast<KAutoObject*>(obj), {});

src/core/hle/kernel/init/init_slab_setup.cpp

@@ -9,6 +9,7 @@
 #include "core/core.h"
 #include "core/hardware_properties.h"
 #include "core/hle/kernel/init/init_slab_setup.h"
+#include "core/hle/kernel/k_event.h"
 #include "core/hle/kernel/k_memory_layout.h"
 #include "core/hle/kernel/k_memory_manager.h"
 #include "core/hle/kernel/k_shared_memory.h"
@@ -25,6 +26,7 @@ namespace Kernel::Init {
 #define FOREACH_SLAB_TYPE(HANDLER, ...)                                                            \
     HANDLER(Process, (SLAB_COUNT(Process)), ##__VA_ARGS__)                                         \
     HANDLER(KThread, (SLAB_COUNT(KThread)), ##__VA_ARGS__)                                         \
+    HANDLER(KEvent, (SLAB_COUNT(KEvent)), ##__VA_ARGS__)                                           \
     HANDLER(KSharedMemory, (SLAB_COUNT(KSharedMemory)), ##__VA_ARGS__)
 
 namespace {

src/core/hle/kernel/k_event.cpp

@@ -4,29 +4,53 @@
 
 #include "core/hle/kernel/k_event.h"
 #include "core/hle/kernel/k_readable_event.h"
+#include "core/hle/kernel/k_resource_limit.h"
 #include "core/hle/kernel/k_writable_event.h"
+#include "core/hle/kernel/process.h"
 
 namespace Kernel {
 
-KEvent::KEvent(KernelCore& kernel, std::string&& name) : Object{kernel, std::move(name)} {}
+KEvent::KEvent(KernelCore& kernel) : KAutoObjectWithSlabHeapAndContainer{kernel} {}
 
 KEvent::~KEvent() = default;
 
-std::shared_ptr<KEvent> KEvent::Create(KernelCore& kernel, std::string&& name) {
-    return std::make_shared<KEvent>(kernel, std::move(name));
-}
+void KEvent::Initialize(std::string&& name_) {
+    // Increment reference count.
+    // Because reference count is one on creation, this will result
+    // in a reference count of two. Thus, when both readable and
+    // writable events are closed this object will be destroyed.
+    Open();
 
-void KEvent::Initialize() {
     // Create our sub events.
-    readable_event = std::make_shared<KReadableEvent>(kernel, GetName() + ":Readable");
-    writable_event = std::make_shared<KWritableEvent>(kernel, GetName() + ":Writable");
+    readable_event = std::make_shared<KReadableEvent>(kernel, name_ + ":Readable");
+    writable_event = std::make_shared<KWritableEvent>(kernel, name_ + ":Writable");
 
     // Initialize our sub sessions.
     readable_event->Initialize(this);
     writable_event->Initialize(this);
 
+    // Set our owner process.
+    owner = kernel.CurrentProcess();
+    if (owner) {
+        owner->Open();
+    }
+
     // Mark initialized.
+    name = std::move(name_);
     initialized = true;
 }
 
+void KEvent::Finalize() {
+    KAutoObjectWithSlabHeapAndContainer<KEvent, KAutoObjectWithList>::Finalize();
+}
+
+void KEvent::PostDestroy(uintptr_t arg) {
+    // Release the event count resource the owner process holds.
+    Process* owner = reinterpret_cast<Process*>(arg);
+    if (owner) {
+        owner->GetResourceLimit()->Release(LimitableResource::Events, 1);
+        owner->Close();
+    }
+}
+
 } // namespace Kernel

src/core/hle/kernel/k_event.h

@@ -4,24 +4,34 @@
 
 #pragma once
 
-#include "core/hle/kernel/object.h"
+#include "core/hle/kernel/slab_helpers.h"
 
 namespace Kernel {
 
 class KernelCore;
 class KReadableEvent;
 class KWritableEvent;
+class Process;
+
+class KEvent final : public KAutoObjectWithSlabHeapAndContainer<KEvent, KAutoObjectWithList> {
+    KERNEL_AUTOOBJECT_TRAITS(KEvent, KAutoObject);
 
-class KEvent final : public Object {
 public:
-    explicit KEvent(KernelCore& kernel, std::string&& name);
+    explicit KEvent(KernelCore& kernel);
     ~KEvent() override;
 
-    static std::shared_ptr<KEvent> Create(KernelCore& kernel, std::string&& name);
+    void Initialize(std::string&& name);
 
-    void Initialize();
+    virtual void Finalize() override;
 
-    void Finalize() override {}
+    virtual bool IsInitialized() const override {
+        return initialized;
+    }
+    virtual uintptr_t GetPostDestroyArgument() const override {
+        return reinterpret_cast<uintptr_t>(owner);
+    }
+
+    static void PostDestroy(uintptr_t arg);
 
     std::string GetTypeName() const override {
         return "KEvent";
@@ -51,6 +61,7 @@ public:
 private:
     std::shared_ptr<KReadableEvent> readable_event;
     std::shared_ptr<KWritableEvent> writable_event;
+    Process* owner{};
     bool initialized{};
 };
 

src/core/hle/kernel/object.h

@@ -71,6 +71,8 @@ protected:
 
 private:
     std::atomic<u32> object_id{0};
+
+protected:
     std::string name;
 };
 

src/core/hle/kernel/svc.cpp

@@ -1953,14 +1953,11 @@ static ResultCode CreateEvent(Core::System& system, Handle* out_write, Handle* o
     HandleTable& handle_table = kernel.CurrentProcess()->GetHandleTable();
 
     // Create a new event.
-    const auto event = KEvent::Create(kernel, "CreateEvent");
-    if (!event) {
-        LOG_ERROR(Kernel_SVC, "Unable to create new events. Event creation limit reached.");
-        return ResultOutOfResource;
-    }
+    KEvent* event = KEvent::CreateWithKernel(kernel);
+    R_UNLESS(event != nullptr, ResultOutOfResource);
 
     // Initialize the event.
-    event->Initialize();
+    event->Initialize("CreateEvent");
 
     // Add the writable event to the handle table.
     const auto write_create_result = handle_table.Create(event->GetWritableEvent().get());