hle: service: Add a helper module for managing kernel objects.

src/core/hle/service/kernel_helpers.h

@@ -0,0 +1,35 @@
+// Copyright 2021 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string>
+
+namespace Core {
+class System;
+}
+
+namespace Kernel {
+class KernelCore;
+class KEvent;
+class KProcess;
+} // namespace Kernel
+
+namespace Service::KernelHelpers {
+
+class ServiceContext {
+public:
+    ServiceContext(Core::System& system_, std::string name_);
+    ~ServiceContext();
+
+    Kernel::KEvent* CreateEvent(std::string&& name);
+
+    void CloseEvent(Kernel::KEvent* event);
+
+private:
+    Kernel::KernelCore& kernel;
+    Kernel::KProcess* process{};
+};
+
+} // namespace Service::KernelHelpers