In a XS function, I want to return a series of AVs. Each of the AV store one object and three integers. Currently, I suppose the code looks like this: 
  PPCODE:
    // the number of return value is known
    EXTEND(SP, things.size());
    // cycle a list of things
    for (size_t i=0; i<things.size(); i++)
    {
        AV* curr_slot = newAV();
        SV* sv_obj = newSV(NULL);
        sv_setref_pv(sv_obj, "My::Class", things[i].obj);
        SV* sv_num1 = newSViv(things[i].foo);
        SV* sv_num2 = newSViv(things[i].bar);
        SV* sv_num3 = newSViv(things[i].baz);
        av_push(curr_slot, sv_obj);
        av_push(curr_slot, sv_num1);
        av_push(curr_slot, sv_num2);
        av_push(curr_slot, sv_num3);
        mPUSHs((SV*) curr_slot);
    }

[download]

Now, I have two questions:

1. There are four SVs created on each for cycle. Should I manually unref them, or they are automatically destroyed on XS function return?

2. Does the use of mPUSHs(AV) correct?

Thanks!!!

In reply to Should I manually unref these SVs in XS code? by llancet

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