Thanks your reply, I also used this way, but it still not work. code as the
following.
gonameunits := []string{"gpu0", "gpu1", "gpu2", "gpu3"}
nameunits := make([]*C.char, len(gonameunits))
for i, _ := range gonameunits {
nameunits[i] = C.CString(gonameunits[i])
defer C.free(unsafe.Pointer(nameunits[i]))
}
fmt.Println("nameunits:", nameunits)
golevelmatrix := [][]int{{1}, {3, 3}, {3, 3, 2}}
levelmatrix := make([][]C.int, len(golevelmatrix))
for i, _ := range golevelmatrix {
levelmatrix[i] = make([]C.int, len(golevelmatrix[i]))
for j, _ := range golevelmatrix[i] {
levelmatrix[i][j] = C.int(golevelmatrix[i][j])
}
}
fmt.Println("levelmatrix:", levelmatrix)
C.test_settopologyresource(mod, C.CString("node1"), C.int(2), (**C.char
)(unsafe.Pointer(&nameunits[0])), (**C.int)(unsafe.Pointer(&levelmatrix[0][0
])))
在 2017年8月4日星期五 UTC+8下午8:09:34，Konstantin Khomoutov写道：
>
> On Fri, Aug 04, 2017 at 02:09:14AM -0700, jianzh...@gmail.com
> <javascript:> 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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