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kern: KAutoObject destruction is now scheduled for next dpc-time

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This commit is contained in:
Michael Scire 2021-04-07 13:38:51 -07:00 • committed by SciresM
parent 15956fcf9a
commit 4407237f5b
7 changed files with 94 additions and 18 deletions
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21
libraries/libmesosphere/include/mesosphere/kern_k_auto_object.hpp
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@ -69,11 +69,12 @@ namespace ams::kern {
private:
MESOSPHERE_AUTOOBJECT_TRAITS(KAutoObject, KAutoObject);
private:
KAutoObject *m_next_closed_object;
std::atomic<u32> m_ref_count;
public:
static KAutoObject *Create(KAutoObject *ptr);
public:
constexpr ALWAYS_INLINE explicit KAutoObject() : m_ref_count(0) { MESOSPHERE_ASSERT_THIS(); }
constexpr ALWAYS_INLINE explicit KAutoObject() : m_next_closed_object(nullptr), m_ref_count(0) { MESOSPHERE_ASSERT_THIS(); }
virtual ~KAutoObject() { MESOSPHERE_ASSERT_THIS(); }
/* Destroy is responsible for destroying the auto object's resources when ref_count hits zero. */
@ -120,7 +121,7 @@ namespace ams::kern {
}
}
ALWAYS_INLINE bool Open() {
NOINLINE bool Open() {
MESOSPHERE_ASSERT_THIS();
/* Atomically increment the reference count, only if it's positive. */
@ -136,7 +137,7 @@ namespace ams::kern {
return true;
}
ALWAYS_INLINE void Close() {
NOINLINE void Close() {
MESOSPHERE_ASSERT_THIS();
/* Atomically decrement the reference count, not allowing it to become negative. */
@ -145,11 +146,19 @@ namespace ams::kern {
MESOSPHERE_ABORT_UNLESS(cur_ref_count > 0);
} while (!m_ref_count.compare_exchange_weak(cur_ref_count, cur_ref_count - 1, std::memory_order_relaxed));
/* If ref count hits zero, destroy the object. */
/* If ref count hits zero, schedule the object for destruction. */
if (cur_ref_count - 1 == 0) {
this->Destroy();
this->ScheduleDestruction();
}
}
private:
/* NOTE: This has to be defined *after* KThread is defined. */
/* Nintendo seems to handle this by defining Open/Close() in a cpp, but we'd like them to remain in headers. */
/* Implementation for this will be inside kern_k_thread.hpp, so it can be ALWAYS_INLINE. */
void ScheduleDestruction();
public:
/* Getter, for KThread. */
ALWAYS_INLINE KAutoObject *GetNextClosedObject() { return m_next_closed_object; }
};
class KAutoObjectWithListContainer;
@ -198,7 +207,7 @@ namespace ams::kern {
}
}
~KScopedAutoObject() {
ALWAYS_INLINE ~KScopedAutoObject() {
if (m_obj != nullptr) {
m_obj->Close();
}