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#ifndef _P_P_PORTABILITY_H_
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#define _P_P_PORTABILITY_H_
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/* Perl/Pollution/Portability Version 1.0007 */
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/* Copyright (C) 1999, Kenneth Albanowski. This code may be used and
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distributed under the same license as any version of Perl. */
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/* For the latest version of this code, please retreive the Devel::PPPort
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module from CPAN, contact the author at <kjahds@kjahds.com>, or check
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with the Perl maintainers. */
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/* If you needed to customize this file for your project, please mention
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your changes, and visible alter the version number. */
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In order for a Perl extension module to be as portable as possible
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across differing versions of Perl itself, certain steps need to be taken.
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Including this header is the first major one, then using dTHR is all the
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appropriate places and using a PL_ prefix to refer to global Perl
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variables is the second.
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/* If you use one of a few functions that were not present in earlier
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versions of Perl, please add a define before the inclusion of ppport.h
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for a static include, or use the GLOBAL request in a single module to
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produce a global definition that can be referenced from the other
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Function: Static define: Extern define:
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newCONSTSUB() NEED_newCONSTSUB NEED_newCONSTSUB_GLOBAL
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/* To verify whether ppport.h is needed for your module, and whether any
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special defines should be used, ppport.h can be run through Perl to check
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your source code. Simply say:
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perl -x ppport.h *.c *.h *.xs foo/*.c [etc]
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The result will be a list of patches suggesting changes that should at
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least be acceptable, if not necessarily the most efficient solution, or a
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fix for all possible problems. It won't catch where dTHR is needed, and
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doesn't attempt to account for global macro or function definitions,
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nested includes, typemaps, etc.
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In order to test for the need of dTHR, please try your module under a
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recent version of Perl that has threading compiled-in.
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@ARGV = ("*.xs") if !@ARGV;
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%badmacros = %funcs = %macros = (); $replace = 0;
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$funcs{$1} = 1 if /Provide:\s+(\S+)/;
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$macros{$1} = 1 if /^#\s*define\s+([a-zA-Z0-9_]+)/;
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$replace = $1 if /Replace:\s+(\d+)/;
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$badmacros{$2}=$1 if $replace and /^#\s*define\s+([a-zA-Z0-9_]+).*?\s+([a-zA-Z0-9_]+)/;
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$badmacros{$1}=$2 if /Replace (\S+) with (\S+)/;
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foreach $filename (map(glob($_),@ARGV)) {
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unless (open(IN, "<$filename")) {
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warn "Unable to read from $file: $!\n";
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print "Scanning $filename...\n";
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$c = ""; while (<IN>) { $c .= $_; } close(IN);
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$need_include = 0; %add_func = (); $changes = 0;
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$has_include = ($c =~ /#.*include.*ppport/m);
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foreach $func (keys %funcs) {
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if ($c =~ /#.*define.*\bNEED_$func(_GLOBAL)?\b/m) {
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if ($c !~ /\b$func\b/m) {
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print "If $func isn't needed, you don't need to request it.\n" if
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$changes += ($c =~ s/^.*#.*define.*\bNEED_$func\b.*\n//m);
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if ($c =~ /\b$func\b/m) {
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if (not $need_include) {
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foreach $macro (keys %macros) {
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if ($c =~ /\b$macro\b/m) {
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print "Uses $macro\n";
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foreach $badmacro (keys %badmacros) {
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if ($c =~ /\b$badmacro\b/m) {
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$changes += ($c =~ s/\b$badmacro\b/$badmacros{$badmacro}/gm);
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print "Uses $badmacros{$badmacro} (instead of $badmacro)\n";
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if (scalar(keys %add_func) or $need_include != $has_include) {
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$inc = join('',map("#define NEED_$_\n", sort keys %add_func)).
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"#include \"ppport.h\"\n";
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$c = "$inc$c" unless $c =~ s/#.*include.*XSUB.*\n/$&$inc/m;
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} elsif (keys %add_func) {
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$inc = join('',map("#define NEED_$_\n", sort keys %add_func));
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$c = "$inc$c" unless $c =~ s/^.*#.*include.*ppport.*$/$inc$&/m;
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if (!$need_include) {
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print "Doesn't seem to need ppport.h.\n";
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$c =~ s/^.*#.*include.*ppport.*\n//m;
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open(OUT,">/tmp/ppport.h.$$");
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open(DIFF, "diff -u $filename /tmp/ppport.h.$$|");
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while (<DIFF>) { s!/tmp/ppport\.h\.$$!$filename.patched!; print STDOUT; }
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unlink("/tmp/ppport.h.$$");
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#ifndef PERL_REVISION
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#ifndef __PATCHLEVEL_H_INCLUDED__
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#include "patchlevel.h"
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#ifndef PERL_REVISION
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#define PERL_REVISION (5)
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#define PERL_VERSION PATCHLEVEL
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#define PERL_SUBVERSION SUBVERSION
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/* Replace PERL_PATCHLEVEL with PERL_VERSION */
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#define PERL_BCDVERSION ((PERL_REVISION * 0x1000000L) + (PERL_VERSION * 0x1000L) + PERL_SUBVERSION)
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#define ERRSV perl_get_sv("@",FALSE)
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#if (PERL_VERSION < 4) || ((PERL_VERSION == 4) && (PERL_SUBVERSION <= 5))
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#define PL_sv_undef sv_undef
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#define PL_sv_yes sv_yes
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#define PL_sv_no sv_no
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#define PL_stdingv stdingv
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#define PL_hints hints
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#define PL_curcop curcop
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#define PL_curstash curstash
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#define PL_copline copline
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#define dTHR extern int no_such_variable
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#define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no)
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#define gv_stashpvn(str,len,flags) gv_stashpv(str,flags)
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#define newSVpvn(data,len) ((len) ? newSVpv ((data), (len)) : newSVpv ("", 0))
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#define newRV_inc(sv) newRV(sv)
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#define newRV_noinc(sv) \
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SV *nsv = (SV*)newRV(sv); \
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#if defined(CRIPPLED_CC) || defined(USE_THREADS)
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SV *nsv = (SV *) newRV(sv);
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#define newRV_noinc(sv) \
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((PL_Sv=(SV*)newRV(sv), SvREFCNT_dec(sv), (SV*)PL_Sv)
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/* Provide: newCONSTSUB */
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/* newCONSTSUB from IO.xs is in the core starting with 5.004_63 */
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#if (PERL_VERSION < 4) || ((PERL_VERSION == 4) && (PERL_SUBVERSION < 63))
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#if defined(NEED_newCONSTSUB)
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extern void newCONSTSUB _((HV * stash, char *name, SV * sv));
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#if defined(NEED_newCONSTSUB) || defined(NEED_newCONSTSUB_GLOBAL)
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newCONSTSUB(stash, name, sv)
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U32 oldhints = PL_hints;
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HV *old_cop_stash = PL_curcop->cop_stash;
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HV *old_curstash = PL_curstash;
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line_t oldline = PL_curcop->cop_line;
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PL_curcop->cop_line = PL_copline;
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PL_hints &= ~HINT_BLOCK_SCOPE;
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PL_curstash = PL_curcop->cop_stash = stash;
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#if (PERL_VERSION < 3) || ((PERL_VERSION == 3) && (PERL_SUBVERSION < 22))
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/* before 5.003_22 */
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#if (PERL_VERSION == 3) && (PERL_SUBVERSION == 22)
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/* 5.003_23 onwards */
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start_subparse(FALSE, 0),
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newSVOP(OP_CONST, 0, newSVpv(name, 0)),
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newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == ""
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newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
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PL_curcop->cop_stash = old_cop_stash;
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PL_curstash = old_curstash;
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PL_curcop->cop_line = oldline;
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#endif /* newCONSTSUB */
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#endif /* _P_P_PORTABILITY_H_ */
added
removed
src/pl/plperl/ppport.h
