SPUG: Threads and perl

Brian Aker brian at tangent.org
Thu Dec 21 14:55:45 CST 2000

So has anyone had much experience with perl and threads?
I have a small server that creates a thread to handle
requests. It would be really nice if I could occasionally
call a perl interpreter to run certain pieces of code. I
have been trying to use the following function:

#include <EXTERN.h>
#include <perl.h>
#include "proto.h"

gchar * perl_handler(gchar *string) {
  STRLEN n_a;
  PerlInterpreter *my_perl;
  gchar *returnable = NULL;
  char *embedding[] = { "", "-e", "0" };

  my_perl = perl_alloc();
  perl_parse(my_perl, NULL, 3, embedding, NULL);

  eval_pv(string, TRUE);
  returnable =  SvPV(perl_get_sv("a", FALSE), n_a);

  return returnable;

I am finding though that if more then one thread
happens to call the perl interpreter at once
I can expect a core dump. So how thread safe is perl
at this point? Anyone know of anything special that
has to be done to make it happy?
Got an idea of a better place to ask this question?

Brian Aker, brian at tangent.org 
Slashdot Senior Developer
Seattle, Washington
You can't grep a dead tree.

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