Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?

Re^2: Some functions in .xs file can't be found

by ikegami (Pope)
on Nov 13, 2013 at 15:05 UTC ( #1062399=note: print w/replies, xml ) Need Help??

in reply to Re: Some functions in .xs file can't be found
in thread Some functions in .xs file can't be found

No, it should be void. The C function doesn't return anything.

#define XSRETURN(off) \ STMT_START { \ const IV tmpXSoff = (off); \ PL_stack_sp = PL_stack_base + ax + (tmpXSoff - 1); \ return; \ } STMT_END

There are two ways of returning to Perl from an XS function:

  • Place it on the Perl stack.
    void foo() { ... mXPUSHs(sv); }
  • Return it from the C function. The typemap will place it on the Perl stack after any conversion and mortalizing it performs.
    SV* foo() { ... return sv; }

The OP's code uses the former approach.

Replies are listed 'Best First'.
Re^3: Some functions in .xs file can't be found
by BrowserUk (Pope) on Nov 13, 2013 at 16:59 UTC

    Indeed. Thanks for the correction.

    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1062399]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others chanting in the Monastery: (3)
As of 2018-05-21 07:07 GMT
Find Nodes?
    Voting Booth?