/* ========================================

  Copyright Amlal El Mahrouss.

  File: dev.h
  Purpose: DDK device support.

======================================== */

#pragma once

#include <DriverKit/ddk.h>

struct _DDK_DEVICE;

#define DDK_DEVICE_NAME_LEN (255)

/// @brief Kernel Device driver.
typedef struct _DDK_DEVICE DDK_FINAL {
  char d_name[DDK_DEVICE_NAME_LEN];     // the device name. Could be /./DEVICE_NAME/
  void* (*d_read)(void* arg, int len);  // read from device.
  void (*d_write)(void* arg, int len);
  void (*d_wait)(void);                             // write to device.
  struct _DDK_DEVICE* (*d_open)(const char* path);  // open device.
  void (*d_close)(struct _DDK_DEVICE* dev);         // close device.
  void (*d_seek)(struct _DDK_DEVICE* dev, size_t off);
  size_t (*d_tell)(struct _DDK_DEVICE* dev);
} DDK_DEVICE, *DDK_DEVICE_PTR;

#define kopen kopen_dev
#define kclose kclose_dev

/// @brief Open a new device from path.
/// @param path the device's path.
DDK_EXTERN DDK_DEVICE_PTR kopen_dev(const char* path);

/// @brief Close any device.
/// @param device valid device.
DDK_EXTERN BOOL kclose_dev(DDK_DEVICE_PTR device);