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Kernel: Make Memory::RingBuffer construction fallible

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This commit is contained in:
Idan Horowitz 2022-01-20 21:10:46 +02:00 • committed by Andreas Kling
parent 9eccd4c56e
commit d65347d39d
4 changed files with 17 additions and 8 deletions
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6
Kernel/Memory/RingBuffer.h
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@ -13,7 +13,7 @@ namespace Kernel::Memory {
class RingBuffer {
public:
RingBuffer(StringView region_name, size_t capacity);
static ErrorOr<NonnullOwnPtr<RingBuffer>> try_create(StringView region_name, size_t capacity);
bool has_space() const { return m_num_used_bytes < m_capacity_in_bytes; }
bool copy_data_in(const UserOrKernelBuffer& buffer, size_t offset, size_t length, PhysicalAddress& start_of_copied_data, size_t& bytes_copied);
@ -29,7 +29,9 @@ public:
size_t bytes_till_end() const { return (m_capacity_in_bytes - ((m_start_of_used + m_num_used_bytes) % m_capacity_in_bytes)) % m_capacity_in_bytes; };
private:
OwnPtr<Memory::Region> m_region;
RingBuffer(NonnullOwnPtr<Memory::Region> region, size_t capacity);
NonnullOwnPtr<Memory::Region> m_region;
Spinlock m_lock;
size_t m_start_of_used {};
size_t m_num_used_bytes {};