rt-thread中结构rt_device中的write函数的原型应该怎么找？

发布于 2023-07-04 18:00:02 浏览：351 订阅该版

```c
struct rt_device
{
    struct rt_object          parent;                   /**< inherit from rt_object */

enum rt_device_class_type type;                     /**< device type */
    rt_uint16_t               flag;                     /**< device flag */
    rt_uint16_t               open_flag;                /**< device open flag */

rt_uint8_t                ref_count;                /**< reference count */
    rt_uint8_t                device_id;                /**< 0 - 255 */
.......

** /* common device interface */
    rt_err_t  (*init)   (rt_device_t dev);
    rt_err_t  (*open)   (rt_device_t dev, rt_uint16_t oflag);
    rt_err_t  (*close)  (rt_device_t dev);
    rt_size_t (*read)   (rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size);
    rt_size_t (*write)  (rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size);
    rt_err_t  (*control)(rt_device_t dev, int cmd, void *args);****
#endif*
.........

};
```
我想问一下这个rt-thread中的rt_device结构体里面主这些comm device interface函数“init,open,close,read,write.control”函数的原型应该怎么找，我想看一下它们是怎么实现的？