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kern: fix bug in up/downcasting of scoped auto objects

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This commit is contained in:
Michael Scire 2020-07-16 20:40:59 -07:00 • committed by SciresM
parent 8d507aa5a1
commit fae2daf77c
2 changed files with 12 additions and 15 deletions
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26
libraries/libmesosphere/include/mesosphere/kern_k_auto_object.hpp
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@ -204,15 +204,20 @@ namespace ams::kern {
this->obj = nullptr;
}
template<typename U>
template<typename U> requires (std::derived_from<T, U> || std::derived_from<U, T>)
constexpr ALWAYS_INLINE KScopedAutoObject(KScopedAutoObject<U> &&rhs) {
if constexpr (std::same_as<T, U>) {
if constexpr (std::derived_from<U, T>) {
/* Upcast. */
this->obj = rhs.obj;
rhs.obj = nullptr;
} else {
T *derived = rhs.obj->template DynamicCast<T *>();
if (derived == nullptr) {
rhs.obj->Close();
/* Downcast. */
T *derived = nullptr;
if (rhs.obj != nullptr) {
derived = rhs.obj->template DynamicCast<T *>();
if (derived == nullptr) {
rhs.obj->Close();
}
}
this->obj = derived;
@ -220,16 +225,7 @@ namespace ams::kern {
}
}
template<typename U>
constexpr ALWAYS_INLINE KScopedAutoObject &operator=(KScopedAutoObject<U> &&rhs) {
if constexpr (!std::same_as<T, U>) {
T *derived = rhs.obj->template DynamicCast<T *>();
if (derived == nullptr) {
rhs.obj->Close();
}
rhs.obj = nullptr;
}
constexpr ALWAYS_INLINE KScopedAutoObject<T> &operator=(KScopedAutoObject<T> &&rhs) {
rhs.Swap(*this);
return *this;
}