Re: XS malloc and free

from perldoc perlguts

    To free an SV that you've created, call "SvREFCNT_dec(SV*)". Norma
+lly
    this call is not necessary (see "Reference Counts and Mortality").
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You do not free SV, you decrement its usage, and, when refcount goes to zero, it will be destroyed, and may be some destruction-time action will be activated

addition to free memory out from external library, consult that library's logic. Perl do not uses external char*, it will copy its data into newly created SV

Best regards,
Courage, the Cowardly Dog

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Re^2: XS malloc and free by ikegami (Patriarch) on Feb 07, 2006 at 19:02 UTC
He's not asking about freeing the SV. He asking about freeing the string from which he created an SV. Furthermore, `SvREFCNT_dec` should not be used here. Making the SV mortal (using `sv_2mortal`) will automatically free the SV at the end of the XSUB. Think of `sv_2mortal` as a delayed `SvREFCNT_dec`.	[reply] [d/l] [select]