On Fri, Aug 04, 2017 at 02:09:14AM -0700, [email protected] wrote:
> Hey Guys,
>
> I'm in trouble in the same issue. My code as the following:
>
> test.go
> ```go
> name := []string{"gpu0", "gpu1", "gpu2", "gpu3"}
> matrix := [3][3]int{{1, 0, 0}, {3, 3, 0}, {3, 3, 2}}
>
> C.test_settopologyresource(mod, C.CString("node1"), C.int(2),
> (**C.char)(unsafe.Pointer(&name[0])),
> (**C.int)(unsafe.Pointer(&matrix[0][0])))
> ```
I'm afraid that's not going to work: the elements of the "name" slice
are strings, and they can't be coersed to *C.char because a Go string is
internally a struct consisting of a pointer and a length.
So I think you'd need to make a "clone" data struct -- something like
this:
cnames := make([]*C.Char, len(names))
for i, name := range names {
cnames[i] = C.CString(name)
}
and then destroy those objects after returning from the C side:
for _, p := range cnames {
C.free(p)
}
[...]
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