X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=embed.pl;h=6c4177d60e19393200c9a2fce642dc0fe0d4a3f1;hb=ad973f306c11e119dc3a8448590409962bde25db;hp=118b911c7162fb82d7cb9ad34dcc6cead5cfbe68;hpb=e50aee73b3d4c555c37e4b4a16694765fb16c887;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/embed.pl b/embed.pl
old mode 100644
new mode 100755
index 118b911..6c4177d
--- a/embed.pl
+++ b/embed.pl
@@ -1,67 +1,282 @@
-#!/usr/bin/perl
+#!/usr/bin/perl -w
 
-open(EM, ">embed.h") || die "Can't create embed.h: $!\n";
+require 5.003;
+
+sub readsyms (\%$) {
+    my ($syms, $file) = @_;
+    %$syms = ();
+    local (*FILE, $_);
+    open(FILE, "< $file")
+	or die "embed.pl: Can't open $file: $!\n";
+    while (<FILE>) {
+	s/[ \t]*#.*//;		# Delete comments.
+	if (/^\s*(\S+)\s*$/) {
+	    $$syms{$1} = 1;
+	}
+    }
+    close(FILE);
+}
+
+readsyms %global, 'global.sym';
+readsyms %interp, 'interp.sym';
+
+sub readvars(\%$$) {
+    my ($syms, $file,$pre) = @_;
+    %$syms = ();
+    local (*FILE, $_);
+    open(FILE, "< $file")
+	or die "embed.pl: Can't open $file: $!\n";
+    while (<FILE>) {
+	s/[ \t]*#.*//;		# Delete comments.
+	if (/PERLVARI?C?\($pre(\w+)/) {
+	    $$syms{$1} = 1;
+	}
+    }
+    close(FILE);
+}
+
+my %intrp;
+my %thread;
+
+readvars %intrp,  'intrpvar.h','I';
+readvars %thread, 'thrdvar.h','T';
+readvars %globvar, 'perlvars.h','G';
+
+foreach my $sym (sort keys %intrp)
+ {
+  warn "$sym not in interp.sym\n" unless exists $interp{$sym};
+  if (exists $global{$sym})
+   {
+    delete $global{$sym};
+    warn "$sym in global.sym as well as interp\n";
+   }
+ }
+
+foreach my $sym (sort keys %globvar)
+ {
+  if (exists $global{$sym})
+   {
+    delete $global{$sym};
+    warn "$sym in global.sym as well as perlvars.h\n";
+   }
+ }
+
+foreach my $sym (keys %interp)
+ {
+  warn "extra $sym in interp.sym\n" 
+   unless exists $intrp{$sym} || exists $thread{$sym};
+ }
+
+foreach my $sym (sort keys %thread)
+ {
+  warn "$sym in intrpvar.h\n" if exists $intrp{$sym};
+  if (exists $global{$sym})
+   {
+    delete $global{$sym};
+    warn "$sym in global.sym as well as thread\n";
+   }
+ }
+
+sub hide ($$) {
+    my ($from, $to) = @_;
+    my $t = int(length($from) / 8);
+    "#define $from" . "\t" x ($t < 3 ? 3 - $t : 1) . "$to\n";
+}
+sub embed ($) {
+    my ($sym) = @_;
+    hide($sym, "Perl_$sym");
+}
+sub multon ($$$) {
+    my ($sym,$pre,$ptr) = @_;
+    hide($sym, "($ptr$pre$sym)");
+}
+sub multoff ($$) {
+    my ($sym,$pre) = @_;
+    hide("$pre$sym", $sym);
+}
+
+unlink 'embed.h';
+open(EM, '> embed.h')
+    or die "Can't create embed.h: $!\n";
 
 print EM <<'END';
-/* This file is derived from global.sym and interp.sym */
+/* !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!! 
+   This file is built by embed.pl from global.sym, intrpvar.h,
+   and thrdvar.h.  Any changes made here will be lost!
+*/
 
 /* (Doing namespace management portably in C is really gross.) */
 
+/*  EMBED has no run-time penalty, but helps keep the Perl namespace
+    from colliding with that used by other libraries pulled in
+    by extensions or by embedding perl.  Allow a cc -DNO_EMBED
+    override, however, to keep binary compatability with previous
+    versions of perl.
+*/
+#ifndef NO_EMBED
+#  define EMBED 1 
+#endif
+
+/* Hide global symbols? */
+
 #ifdef EMBED
 
-/* globals we need to hide from the world */
 END
 
-open(GL, "<global.sym") || die "Can't open global.sym: $!\n";
-
-while(<GL>) {
-	s/[ \t]*#.*//;		# Delete comments.
-	next unless /\S/;
-	s/(.*)/#define $1\t\tPerl_$1/;
-	s/(................\t)\t/$1/;
-	print EM $_;
+for $sym (sort keys %global) {
+    print EM embed($sym);
 }
 
-close(GL) || warn "Can't close global.sym: $!\n";
-
 print EM <<'END';
 
 #endif /* EMBED */
 
-/* Put interpreter specific symbols into a struct? */
+END
+
+close(EM);
+
+unlink 'embedvar.h';
+open(EM, '> embedvar.h')
+    or die "Can't create embedvar.h: $!\n";
+
+print EM <<'END';
+/* !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!! 
+   This file is built by embed.pl from global.sym, intrpvar.h,
+   and thrdvar.h.  Any changes made here will be lost!
+*/
+
+/* (Doing namespace management portably in C is really gross.) */
+
+/*  EMBED has no run-time penalty, but helps keep the Perl namespace
+    from colliding with that used by other libraries pulled in
+    by extensions or by embedding perl.  Allow a cc -DNO_EMBED
+    override, however, to keep binary compatability with previous
+    versions of perl.
+*/
+
+
+/* Put interpreter-specific symbols into a struct? */
 
 #ifdef MULTIPLICITY
 
+#ifndef USE_THREADS
+/* If we do not have threads then per-thread vars are per-interpreter */
+
 END
 
-open(INT, "<interp.sym") || die "Can't open interp.sym: $!\n";
-while (<INT>) {
-	s/[ \t]*#.*//;		# Delete comments.
-	next unless /\S/;
-	s/(.*)/#define $1\t\t(curinterp->I$1)/;
-	s/(................\t)\t/$1/;
-	print EM $_;
+for $sym (sort keys %thread) {
+    print EM multon($sym,'T','curinterp->');
 }
-close(INT) || warn "Can't close interp.sym: $!\n";
 
 print EM <<'END';
 
-#else	/* not multiple, so translate interpreter symbols the other way... */
+#endif /* !USE_THREADS */
+
+/* These are always per-interpreter if there is more than one */
 
 END
 
-open(INT, "<interp.sym") || die "Can't open interp.sym: $!\n";
-while (<INT>) {
-	s/[ \t]*#.*//;		# Delete comments.
-	next unless /\S/;
-	s/(.*)/#define I$1\t\t$1/;
-	s/(................\t)\t/$1/;
-	print EM $_;
+for $sym (sort keys %intrp) {
+    print EM multon($sym,'I','curinterp->');
+}
+
+print EM <<'END';
+
+#else	/* !MULTIPLICITY */
+
+END
+
+for $sym (sort keys %intrp) {
+    print EM multoff($sym,'I');
+}
+
+print EM <<'END';
+
+#ifndef USE_THREADS
+
+END
+
+for $sym (sort keys %thread) {
+    print EM multoff($sym,'T');
 }
-close(INT) || warn "Can't close interp.sym: $!\n";
 
 print EM <<'END';
 
+#endif /* USE_THREADS */
+
+/* Hide what would have been interpreter-specific symbols? */
+
+#ifdef EMBED
+
+END
+
+for $sym (sort keys %intrp) {
+    print EM embed($sym);
+}
+
+print EM <<'END';
+
+#ifndef USE_THREADS
+
+END
+
+for $sym (sort keys %thread) {
+    print EM embed($sym);
+}
+
+print EM <<'END';
+
+#endif /* USE_THREADS */
+#endif /* EMBED */
 #endif /* MULTIPLICITY */
+
+/* Now same trickey for per-thread variables */
+
+#ifdef USE_THREADS
+
+END
+
+for $sym (sort keys %thread) {
+    print EM multon($sym,'T','thr->');
+}
+
+print EM <<'END';
+
+#endif /* USE_THREADS */
+
+#ifdef PERL_GLOBAL_STRUCT
+
+END
+
+for $sym (sort keys %globvar) {
+    print EM multon($sym,'G','Perl_Vars.');
+}
+
+print EM <<'END';
+
+#else /* !PERL_GLOBAL_STRUCT */
+
+END
+
+for $sym (sort keys %globvar) {
+    print EM multoff($sym,'G');
+}
+
+print EM <<'END';
+
+#ifdef EMBED
+
+END
+
+for $sym (sort keys %globvar) {
+    print EM embed($sym);
+}
+
+print EM <<'END';
+
+#endif /* EMBED */
+#endif /* PERL_GLOBAL_STRUCT */
+
 END
 
+close(EM);