extension device 延伸设备
Bridge Extension Device 桥梁伸缩装置
Edge Extension Overfeed Device 扩边超喂
extension grounding device 外延接地装置
The second parameter we passed 0, and it says to specify the number of bytes to create for the device extension.
第二个参数我们传0进去,这个参数是指定用来创建新设备扩展的字节数的。
I find it easiest to mimic the pattern of structure declaration used in the official DDK, so I declared this device extension as a structure with a tag as well as a type and pointer-to-type name.
很容易模仿在正式的DD K种使用的结构声明的模式,所以我把这个设备扩展名声明称一个结构,伴随标签和类型以及类型指针名称。
If the raw device is not large enough for the new chunk end offset, the extension will fail.
如果原始设备对于新块结束偏移量不够大,扩展就会失败。
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