- PL_modglobal
-
PL_modglobal is a general purpose, interpreter global HV for use by
extensions that need to keep information on a per-interpreter basis. In a pinch, it can
also be used as a symbol table for extensions to share data among each other. It is a good
idea to use keys prefixed by the package name of the extension that owns the data.
- PL_na
-
A convenience variable which is typically used with SvPV when one doesn't
care about the length of the string. It is usually more efficient to either declare a
local variable and use that instead or to use the SvPV_nolen macro.
- PL_sv_no
-
This is the false SV. See PL_sv_yes. Always refer to this as &PL_sv_no.
- PL_sv_undef
-
This is the undef SV. Always refer to this as &PL_sv_undef.
- PL_sv_yes
-
This is the true SV. See PL_sv_no. Always refer to this as &PL_sv_yes.
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