douzhi4830 2013-11-01 04:53
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Golang:不安全的动态字节数组

I am trying to interface with a Windows dll using Go. The dll function I want to use accepts a pointer to a byte array. Therefore I need to give it that byte array.

I am using the syscall libary to call the dll, as demonstrated here. My basic requirements are:

  • I am given the required size for the byte array
  • I create the byte array
  • I must get a pointer to the byte array
  • I then pass the pointer to the Windows dll

I can't figure out how to create a byte array in go, and get a pointer to it. This is obviously an unsafe operation, and the unsafe library can be helpful, but I need to create a dynamic-length byte array in the first place. Creating a slice with "make" doesn't help me, unless I can get a pointer to the slice's backing array.

Has anyone else encountered this or have any ideas?

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  • douweng5420 2013-11-01 05:44
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    I think syscall.ComputerName implementation https://golang.org/src/syscall/syscall_windows.go#395 would be a good example. It uses uint16s, not bytes, but otherwise ...

    In your case it would be ptr := &myslice[0].

    Alex

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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