Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Actually, that's XS.

In your first example, you're returning an SV* you looked up in the hash, so you don't own it. Inline::C works by generating an XS file and running xsubpp, and XS mortalizes any SV* that you return via its RETVAL mechanism. Thus, you've mortalized an SV* owned by the hash. Which is not at all pointed out by the Inline documentation (it should be in Inline::C-Cookbook), and the description in perlxs seems suspicious to me to (it claims that RETVAL is mortalized via the typemap file, but I'm looking at the typemap and I see no relevant mention of 'mortal' anywhere -- nor any mention of RETVAL.)

So I think this should work:

package InlineTest; use strict; use warnings; use Inline qw(NOCLEAN INFO); use Inline 'C' => <<'CEND'; SV* x (HV* self) { SV** xp = hv_fetch(self, "x", 1, 0); /* Increment the ref count because XS mortalizes any returned SV* */ return xp ? SvREFCNT_inc(*xp) : &PL_sv_undef; } CEND sub new { my $self = shift; return bless {@_}, $self; } package main; use strict; use warnings; my $t = InlineTest->new( x => 'foo' ); print $t->x, "\n";
And it doesn't seem to leak, either: replace the last two lines with
sub Whiner::DESTROY { print "Dying!\n" } my $t = InlineTest->new( x => bless [], 'Whiner' ); print $t->x, "\n"; undef $t; print "Done.\n";
and it prints "Dying!" before "Done."

In general, I would also recommend using <<'CEND' rather than <<CEND for blocks of Inline code, because if you want to insert a debugging printf("Got here!\n"), then you don't really want that \n to be translated to a newline.

I work for Reactrix Systems, and am willing to admit it.

In reply to Re^2: Inline::C - object accessor failure by sfink
in thread Inline::C - object accessor failure by fireartist

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (4)
As of 2023-09-27 11:30 GMT
Find Nodes?
    Voting Booth?

    No recent polls found