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#ifndef TEACH_OS_KERNEL_FILESYSTEM_DEVICE_INODE_HPP
#define TEACH_OS_KERNEL_FILESYSTEM_DEVICE_INODE_HPP
#include <kernel/filesystem/inode.hpp>
#include <kapi/devices/device.hpp>
#include <kstd/memory>
#include <cstddef>
namespace kernel::filesystem
{
/**
@brief Inode implementation for device inodes in the filesystem. This inode represents a device file that provides
access to a device registered in the system. The device inode allows reading from and writing to the associated
device.
*/
struct device_inode : inode
{
/**
@brief Create a device inode with the given @p device.
@param device The device to associate with the inode.
*/
explicit device_inode(kstd::shared_ptr<kapi::devices::device> const & device);
/**
@brief Read data from the device inode (and in the background from the associated device) into a @p buffer, starting
at @p offset and reading @p size bytes.
@param buffer The buffer to read data into.
@param offset The offset to read from.
@param size The number of bytes to read.
@return The number of bytes read.
*/
auto read(void * buffer, size_t offset, size_t size) const -> size_t override;
/**
@brief Write data to the device inode (and in the background from the associated device) from a @p buffer, starting
at @p offset and writing @p size bytes.
@param buffer The buffer containing data to write.
@param offset The offset to write to.
@param size The number of bytes to write.
@return The number of bytes written.
*/
auto write(void const * buffer, size_t offset, size_t size) -> size_t override;
/**
@brief Get the associated device.
@return A reference to the associated device.
*/
[[nodiscard]] auto device() const -> kstd::shared_ptr<kapi::devices::device> const &;
private:
kstd::shared_ptr<kapi::devices::device> m_device;
};
} // namespace kernel::filesystem
#endif
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