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Kernel/LibC: Implement basic epoll

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This implementation is on top of inodes instead of fds as linux does it.
If I start finding ports/software that relies on epoll allowing
duplicate inodes, I will do what linux does.

I'm probably missing multiple epoll_notify's which may cause hangs but
the system seems to work fine :dd:
This commit is contained in:
Bananymous
2025-05-13 10:10:35 +03:00
parent 143a00626b
commit 1bcd1edbf5
43 changed files with 627 additions and 119 deletions
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8
kernel/include/kernel/Input/InputDevice.h
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@@ -31,7 +31,7 @@ namespace Kernel
bool can_read_impl() const override { SpinLockGuard _(m_event_lock); return m_event_count > 0; }
bool can_write_impl() const override { return false; }
bool has_error_impl() const override { return false; }
bool has_hangup_impl() const override { return false; }
private:
BAN::ErrorOr<size_t> read_non_block(BAN::ByteSpan);
@@ -64,7 +64,7 @@ namespace Kernel
public:
static BAN::ErrorOr<BAN::RefPtr<KeyboardDevice>> create(mode_t mode, uid_t uid, gid_t gid);
void notify() { m_thread_blocker.unblock(); }
void notify();
private:
KeyboardDevice(mode_t mode, uid_t uid, gid_t gid);
@@ -73,6 +73,7 @@ namespace Kernel
bool can_read_impl() const override;
bool can_write_impl() const override { return false; }
bool has_error_impl() const override { return false; }
bool has_hangup_impl() const override { return false; }
BAN::StringView name() const final override { return m_name; }
dev_t rdev() const final override { return m_rdev; }
@@ -90,7 +91,7 @@ namespace Kernel
public:
static BAN::ErrorOr<BAN::RefPtr<MouseDevice>> create(mode_t mode, uid_t uid, gid_t gid);
void notify() { m_thread_blocker.unblock(); }
void notify();
private:
MouseDevice(mode_t mode, uid_t uid, gid_t gid);
@@ -99,6 +100,7 @@ namespace Kernel
bool can_read_impl() const override;
bool can_write_impl() const override { return false; }
bool has_error_impl() const override { return false; }
bool has_hangup_impl() const override { return false; }
BAN::StringView name() const final override { return m_name; }
dev_t rdev() const final override { return m_rdev; }