X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pod%2Fperlembed.pod;h=36da54f7fe3318255e8facd1292c4ff2090f1631;hb=7360c6b444ea6e19b6583f9530f845bee19c7921;hp=2466531255a3e2159c022b56233db11a7cc17632;hpb=1c5b513e3fd8bc7a5a38ca94832b9e848ef0301d;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/pod/perlembed.pod b/pod/perlembed.pod
index 2466531..36da54f 100644
--- a/pod/perlembed.pod
+++ b/pod/perlembed.pod
@@ -196,11 +196,20 @@ version of I<miniperlmain.c> containing the essentials of embedding:
 
 Notice that we don't use the C<env> pointer.  Normally handed to
 C<perl_parse> as its final argument, C<env> here is replaced by
-C<NULL>, which means that the current environment will be used.  The macros
-PERL_SYS_INIT3() and PERL_SYS_TERM() provide system-specific tune up 
-of the C runtime environment necessary to run Perl interpreters; since
-PERL_SYS_INIT3() may change C<env>, it may be more appropriate to provide
-C<env> as an argument to perl_parse().
+C<NULL>, which means that the current environment will be used.
+
+The macros PERL_SYS_INIT3() and PERL_SYS_TERM() provide system-specific
+tune up of the C runtime environment necessary to run Perl interpreters;
+they should only be called once regardless of how many interpreters you
+create or destroy. Call PERL_SYS_INIT3() before you create your first
+interpreter, and PERL_SYS_TERM() after you free your last interpreter.
+
+Since PERL_SYS_INIT3() may change C<env>, it may be more appropriate to
+provide C<env> as an argument to perl_parse().
+
+Also notice that no matter what arguments you pass to perl_parse(),
+PERL_SYS_INIT3() must be invoked on the C main() argc, argv and env and
+only once.
 
 Now compile this program (I'll call it I<interp.c>) into an executable:
 
@@ -325,15 +334,15 @@ the first, a C<float> from the second, and a C<char *> from the third.
 
        /** Treat $a as an integer **/
        eval_pv("$a = 3; $a **= 2", TRUE);
-       printf("a = %d\n", SvIV(get_sv("a", FALSE)));
+       printf("a = %d\n", SvIV(get_sv("a", 0)));
 
        /** Treat $a as a float **/
        eval_pv("$a = 3.14; $a **= 2", TRUE);
-       printf("a = %f\n", SvNV(get_sv("a", FALSE)));
+       printf("a = %f\n", SvNV(get_sv("a", 0)));
 
        /** Treat $a as a string **/
        eval_pv("$a = 'rekcaH lreP rehtonA tsuJ'; $a = reverse($a);", TRUE);
-       printf("a = %s\n", SvPV_nolen(get_sv("a", FALSE)));
+       printf("a = %s\n", SvPV_nolen(get_sv("a", 0)));
 
        perl_destruct(my_perl);
        perl_free(my_perl);
@@ -457,7 +466,7 @@ been wrapped here):
      retval = my_eval_sv(command, TRUE);
      SvREFCNT_dec(command);
 
-     *string = get_sv("string", FALSE);
+     *string = get_sv("string", 0);
      return SvIV(retval);
  }
 
@@ -480,7 +489,7 @@ been wrapped here):
      my_eval_sv(command, TRUE);
      SvREFCNT_dec(command);
 
-     *match_list = get_av("array", FALSE);
+     *match_list = get_av("array", 0);
      num_matches = av_len(*match_list) + 1; /** assume $[ is 0 **/
 
      return num_matches;