Internals

Native implementation of Internals

Provides internal Perl functions that manipulate SV flags.

Perl equivalent: Internals (core module, always available)

Functions

SvREADONLY

Query or set the readonly flag on an SV. With one argument, returns the current readonly status. With two arguments, sets or clears the flag.

my $ro = Internals::SvREADONLY($sv);      # query
Internals::SvREADONLY($sv, 1);             # make readonly
Internals::SvREADONLY($sv, 0);             # make writable

SvREFCNT

Returns the reference count of an SV. Always returns 1 in PetaPerl (Rust uses Arc refcounting, not Perl’s SV refcount).

my $cnt = Internals::SvREFCNT($sv);

hv_clear_placeholders

No-op. In perl5 this removes placeholder entries from restricted hashes. PetaPerl does not implement restricted hashes, so this is a silent no-op.

Internals::hv_clear_placeholders(\%hash);