Hi all,
> You can access package variables directly:
>
> printf("here: %s\n", SvPV_nolen(get_sv("main::data",0)));
Wow OK - I didn't know you could do that. I'm wondering if this could be added
into the Inline::C Cookbook? Perhaps under the heading "Accessing Perl
variables directly from a C function".
Rob, are you still maintaining Inline?
Cheers,
Ron.
> On 30 Nov 2016, at 6:25 am, [email protected] wrote:
>
> Hi,
>
> You can also access the string in $data from C with (untested):
>
> SvPV_nolen(get_sv(main::data,0));
> See 'perldoc perlapi' (or maybe it's in 'perldoc perlcall').
>
> Cheers,
> Rob
>
> From: Ron Grunwald via inline
> Sent: Wednesday, November 30, 2016 1:10 AM
> To: Perf Tech ; [email protected]
> Subject: Re: Question about accessing global data from a line function
> Hi Jin,
>
> I don’t think you can access perl variables this way because your C function
> needs some sort of reference to them. Change your code to,
>
> $data = "this is a test";
> test($data);
>
>
> use Inline C => <<'END_OF_C_CODE';
>
>
> void test(SV* data) {
> printf("here: %s\n", SvPV(data, PL_na));
> }
>
>
> END_OF_C_CODE
>
> Cheers,
> Ron.
>
>
> On 23 Nov 2016, at 1:29 pm, Perf Tech <[email protected]> wrote:
>
> Dear expert,
>
> I am trying to access perl global variable ($data in this case) from within
> a inline C function, but the "data" variable I used is not defined.
> Any idea how to do it?
>
> Thanks
> Jin
>
>
> $data = "this is a test";
> test();
>
> use Inline C => <<'END_OF_C_CODE';
>
> void test() {
> printf("here: %s\n", SvPV(data, PL_na));
> }
>
> END_OF_C_CODE
>
>
>
