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Kernel: Make VirtIO::ConsolePort construction OOM-fallible

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This commit is contained in:
Idan Horowitz 2022-01-26 22:03:48 +02:00 • committed by Linus Groh
parent 94a39db31d
commit ac4583660b
2 changed files with 16 additions and 6 deletions
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9
Kernel/Bus/VirtIO/ConsolePort.h
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@ -24,7 +24,8 @@ class Console;
class ConsolePort
: public CharacterDevice {
public:
explicit ConsolePort(unsigned port, VirtIO::Console&);
static ErrorOr<NonnullRefPtr<ConsolePort>> try_create(unsigned port, VirtIO::Console&);
void handle_queue_update(Badge<VirtIO::Console>, u16 queue_index);
void set_open(Badge<VirtIO::Console>, bool state) { m_open = state; }
@ -35,6 +36,8 @@ public:
private:
constexpr static size_t RINGBUFFER_SIZE = 2 * PAGE_SIZE;
ConsolePort(unsigned port, VirtIO::Console& console, NonnullOwnPtr<Memory::RingBuffer> receive_buffer, NonnullOwnPtr<Memory::RingBuffer> transmit_buffer);
virtual StringView class_name() const override { return "VirtIOConsolePort"sv; }
virtual bool can_read(const OpenFileDescription&, u64) const override;
@ -47,8 +50,8 @@ private:
u16 m_receive_queue {};
u16 m_transmit_queue {};
OwnPtr<Memory::RingBuffer> m_receive_buffer;
OwnPtr<Memory::RingBuffer> m_transmit_buffer;
NonnullOwnPtr<Memory::RingBuffer> m_receive_buffer;
NonnullOwnPtr<Memory::RingBuffer> m_transmit_buffer;
VirtIO::Console& m_console;
unsigned m_port;