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perlembed - global variables

by jithoosin (Scribe)
on Dec 26, 2005 at 14:12 UTC ( #519144=perlquestion: print w/replies, xml ) Need Help??

jithoosin has asked for the wisdom of the Perl Monks concerning the following question:

     Kiran Pradeep
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Respected Monks,
I am calling a perl subroutines in a perl file repeatedly from a C file.My question is that if i have GLOBAL variables in the perl file ,will the value of global variables be retained between each of function calls from the C file. I also want to when the global variables will actually be initialized? Are they initialized when i call "perl_parse" or "perl_run" or when i call "perl_argv"?

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Re: perlembed Ė global variables
by Aristotle (Chancellor) on Dec 26, 2005 at 15:17 UTC

    Caveat lector: I donít know what Iím talking about, because I havenít written any code that embeds a Perl interpreter.

    That said, if the embedding interface works the way I would intuitively expect it from my experience with the way things work when writing Perl that runs in a standalone interpreter then global variables are initialised when the code that initialises them runs, which is usually part of the file-level code, so that would be when you call perl_run; however, if the initialisation is within BEGIN blocks or such, it will happen when you call perl_parse.

    And if mod_perl is any indication, then global variables are retained between function calls.

    Makeshifts last the longest.

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