Golang：不安全的动态字节数组

Question

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?

Answer 1

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