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// Copyright 2024-2025, Amlal El Mahrouss (amlal@nekernel.org)
// Licensed under the Apache License, Version 2.0 (see LICENSE file)
// Official repository: https://github.com/nekernel-org/nekernel
#ifndef _NEKIT_REF_H_
#define _NEKIT_REF_H_
#include <CompilerKit/CompilerKit.h>
#include <KernelKit/HeapMgr.h>
#include <NeKit/Config.h>
#include <NeKit/Domain.h>
#include <NeKit/KernelPanic.h>
#include <NeKit/Vettable.h>
namespace Kernel {
/// =========================================================== ///
/// @brief Reference wrapper class. ///
/// =========================================================== ///
template <typename T>
class Ref final {
public:
Ref() = default;
~Ref() = default;
public:
using Type = T;
using ConstType = const T&;
using RefType = T&;
Ref(Type cls) : fClass(cls) {}
Ref& operator=(nullPtr) { return *this; }
Ref& operator=(Type* ref) {
fClass = *ref;
return *this;
}
Ref& operator=(Type ref) {
fClass = ref;
return *this;
}
NE_COPY_DEFAULT(Ref)
public:
Type operator->() const { return fClass; }
Type& Leak() { return fClass; }
Type& TryLeak() {
MUST_PASS(fClass);
return fClass;
}
Type operator*() { return fClass; }
explicit operator bool() {
if constexpr (IsVettable<Type>) {
return Type::kVettable;
} else {
return false;
}
}
private:
Type fClass;
};
template <typename T>
class NonNullRef final {
public:
using RefType = Ref<T>;
using Type = T;
NonNullRef() = delete;
NonNullRef(Type* ref) : fRef(ref) {}
NonNullRef(nullPtr ref) = delete;
NonNullRef(RefType ref) : fRef(ref) {}
Ref<T>& operator->() {
MUST_PASS(fRef);
return fRef;
}
NonNullRef& operator=(const NonNullRef<T>& ref) = delete;
NonNullRef(const NonNullRef<T>& ref) = delete;
private:
Ref<T> fRef{};
};
using RefAny = Ref<Any>;
using NonNullRefAny = NonNullRef<Any>;
} // namespace Kernel
#endif // ifndef _NEKIT_REF_H_
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