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Kernel: Make Kernel::VMObject allocation functions return KResultOr

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This makes for nicer handling of errors compared to checking whether a
RefPtr is null. Additionally, this will give way to return different
types of errors in the future.
This commit is contained in:
sin-ack 2021-08-15 09:07:59 +00:00 • committed by Andreas Kling
parent 61c0e3ca92
commit 4bfd6e41b9
26 changed files with 194 additions and 122 deletions
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12
Kernel/Memory/AnonymousVMObject.h
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@ -18,12 +18,12 @@ class AnonymousVMObject final : public VMObject {
public:
virtual ~AnonymousVMObject() override;
static RefPtr<AnonymousVMObject> try_create_with_size(size_t, AllocationStrategy);
static RefPtr<AnonymousVMObject> try_create_for_physical_range(PhysicalAddress paddr, size_t size);
static RefPtr<AnonymousVMObject> try_create_with_physical_pages(Span<NonnullRefPtr<PhysicalPage>>);
static RefPtr<AnonymousVMObject> try_create_purgeable_with_size(size_t, AllocationStrategy);
static RefPtr<AnonymousVMObject> try_create_physically_contiguous_with_size(size_t);
virtual RefPtr<VMObject> try_clone() override;
static KResultOr<NonnullRefPtr<AnonymousVMObject>> try_create_with_size(size_t, AllocationStrategy);
static KResultOr<NonnullRefPtr<AnonymousVMObject>> try_create_for_physical_range(PhysicalAddress paddr, size_t size);
static KResultOr<NonnullRefPtr<AnonymousVMObject>> try_create_with_physical_pages(Span<NonnullRefPtr<PhysicalPage>>);
static KResultOr<NonnullRefPtr<AnonymousVMObject>> try_create_purgeable_with_size(size_t, AllocationStrategy);
static KResultOr<NonnullRefPtr<AnonymousVMObject>> try_create_physically_contiguous_with_size(size_t);
virtual KResultOr<NonnullRefPtr<VMObject>> try_clone() override;
[[nodiscard]] NonnullRefPtr<PhysicalPage> allocate_committed_page(Badge<Region>);
PageFaultResponse handle_cow_fault(size_t, VirtualAddress);