But, if I can not change the C client, how to implement it? the C client as
the following. As described on the above, I have to change the ` int**
_levelmatrix` argument, right?
bool test_settopologyresource(bsagomodule* _self, char* _nodename,
int _resourceindex, char** _nameunits, int** _levelmatrix) {
printf("\n set topology resource-> node:%s, resource index:%d", _nodename
, _resourceindex);
bool result = settopologyresource(_self->client, _nodename,
_resourceindex, _nameunits, _levelmatrix);
return result;
}
在 2017年8月7日星期一 UTC+8下午10:14:44，Konstantin Khomoutov写道：
>
> On Mon, Aug 07, 2017 at 06:25:48AM -0700, [email protected]
> <javascript:> wrote:
>
> > Thank you very much for your patience and help. I got it and will try it
> > later. :)
>
> Glad to help!
>
> > > > 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])
> > > > }
> > > > }
> [...]
>
> I'd like to reiterate more precisely: your client is expecting a
> multi-dimensional array which, in C, would be a contiguous region of
> memory. The Go's [][]C.int is a slice of individual []C.int slices.
> Hence when you pass &levelmatrix[0][0] to your C client, it receives the
> address of the first element of the first slice, and the only valid
> region of memory to access via that pointer is that element and all the
> element following it up to (but not including) the length of the first
> slice.
>
> As soon as the C client attempts to access any memory region other than
> that, it may read/write random memory and even invalid memory (at the
> addressed which are not allocated/mapped) -- in which case you get
> SIGSEGV or the like.
>
>
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