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rt_device_write/read return data type as rt_ssize_t

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rt_ssize_t can give negative error code, which follows the unix style correctly
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Meco Man
2023-02-05 18:35:33 -05:00
committed by Man, Jianting (Meco)
parent 890c1c9264
commit f58d3c5200
308 changed files with 671 additions and 685 deletions
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documentation/device/device.md
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@@ -120,8 +120,8 @@ struct rt_device_ops
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_ssize_t (*read) (rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size);
rt_ssize_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);
};