See SvSHARE(), SvLOCK & SvUNLOCK in perlapi.

Alternatively, you might do:

use threads;
use threads::shared; 

my $d : shared;

$d = shared_clone( mymodule::myfunc() );

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In reply to Re: How to make thread-save data on C API by BrowserUk
in thread How to make thread-save data on C API by Tormalon

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