#ifndef __KERNEL_h
#define __KERNEL_h


#include "common.h"

#define kernel_section_name "kernel_xjm"	

#define KERNEL_TYPE			static

#define K_SUCCESS			0
#define K_FAIL				-1				//执行错误
#define K_NOFOUND			-2				//未找到

#define k_OPEN_FAIL			-3				//设备存在，但打开失败
#define K_PARAM_ERR			-4				//输入参数错误
#define K_UNOPEN			-5				//设备未打开
#define K_OPS_NULL			-6				//设备接口未实现

#define K_TIMEOUT			-7				//执行超时

#define KERNEL_DEVICE_INIT(device_name)								\
	KERNEL_TYPE const char kernel_device_name[] = device_name;		\
	KERNEL_TYPE int kernel_device_status = FALSE; 

#define KERNEL_CHECK_OPEN											\
	if (kernel_device_status == FALSE) return K_UNOPEN;				\

//内核框架
typedef struct
{
	int (*f_open)(int flags);

	int (*f_write)(unsigned char *buff, unsigned int len, void *param);

	int (*f_read)(unsigned char *buff, unsigned int len, void *param);

	int (*f_ioctl)(unsigned int cmd, unsigned long arg);

	int (*f_close)(void);

	int (*f_isopen)(void);
} file_operations;

typedef struct
{
	char *filename;						
	file_operations *ops;				
} KENERAL_NODE;


#define register_driver(ops)                                                                   		\
	static const KENERAL_NODE kernel_node = {(char *)kernel_device_name, (file_operations *)&ops};	\
	static const int kernel_mem_node __attribute__((used, section(kernel_section_name))) = (int)&kernel_node;


int open(char *filename, int flags);

int write(int handle, unsigned char *buff, unsigned int len, void *param);

int read(int handle, unsigned char *buff, unsigned int len, void *param);

int ioctl(int handle, unsigned int cmd, unsigned long arg);

int close(int handle);

int isopen(int handle);				


#endif