一个设备接口实例

1万 · 2021-11-29 16:15

device.h:

#ifndef __DEVICE_H__

#define __DEVICE_H__



#ifndef NULL

#define NULL ((void *)0)

#endif



typedef int (*on_recv_fun)(void *);



typedef struct {

        on_recv_fun on_recv;

}device_methods_t;





typedef struct {

        void *pdev;

        device_methods_t* methods;

}device_interface_t;





int register_dev(const char* name, device_interface_t devi);





#endif

1万 · 2021-11-29 20:17

device.c:

复制

#include <stdio.h>

#include <string.h>

#include "device.h"



device_interface_t g_device;



int register_dev(const char* name, device_interface_t *devi)

{

        if(devi == NULL) {

                printf("%d: devi is NULL!\n",__LINE__ + 1);

                return -__LINE__;

        }

        

        if(name == NULL || devi->methods == NULL || devi->pdev == NULL) {

                printf("%d: name or methods or pdev is NULL!\n",__LINE__ + 1);

                return -__LINE__;

        }



        g_device.methods = devi->methods;

        g_device.pdev = devi->pdev;

        

        return 0;

}

1万 · 2021-11-29 20:42

dev_485.c:

复制

#include <stdio.h>

#include "dev_485.h"



static int on_485_recv(void *param)

{

        if(param ==NULL){

                printf("%d: param NULL!\n",__LINE__ + 1);

                return -__LINE__;

        } 

        

        return 0;

}





device_methods_t dev_485_methords = {

        .on_recv = on_485_recv

};



device_485_t g_dev_485;







int dev_485_init(void)

{

        device_interface_t devi = {

                .pdev = &g_dev_485,

                .methods = &dev_485_methords

        };



        int ret = register_dev("485",&devi);

        

        return ret;

}

1万 · 2021-11-29 20:44

dev_485.h:

复制

#ifndef __DEV_485_H__

#define __DEV_485_H__



#include "device.h"



typedef struct {

        char *name;

}device_485_t;





int dev_485_init(void);





#endif