3 # Regenerate (overwriting only if changed):
11 # from information stored in
18 # Accepts the standard regen_lib -q and -v args.
20 # This script is normally invoked from regen.pl.
22 require 5.004; # keep this compatible, an old perl is all we may have before
23 # we build the new one
28 # Get function prototypes
29 require 'regen/regen_lib.pl';
30 require 'regen/embed_lib.pl';
33 my $SPLINT = 0; # Turn true for experimental splint support http://www.splint.org
34 my $unflagged_pointers;
37 # See database of global and static function prototypes in embed.fnc
38 # This is used to generate prototype headers under various configurations,
39 # export symbols lists for different platforms, and macros to provide an
40 # implicit interpreter context argument.
43 sub full_name ($$) { # Returns the function name with potentially the
44 # prefixes 'S_' or 'Perl_'
45 my ($func, $flags) = @_;
47 return "S_$func" if $flags =~ /[si]/;
48 return "Perl_$func" if $flags =~ /[bp]/;
52 sub open_print_header {
53 my ($file, $quote) = @_;
55 return open_new($file, '>',
56 { file => $file, style => '*', by => 'regen/embed.pl',
57 from => ['data in embed.fnc', 'regen/embed.pl',
58 'regen/opcodes', 'intrpvar.h', 'perlvars.h'],
59 final => "\nEdit those files and run 'make regen_headers' to effect changes.\n",
60 copyright => [1993 .. 2009], quote => $quote });
63 my ($embed, $core, $ext, $api) = setup_embed();
67 my $pr = open_print_header("proto.h");
68 print $pr "START_EXTERN_C\n";
73 print $pr "$_->[0]\n";
77 my ($flags,$retval,$plain_func,@args) = @$_;
79 my $has_context = ( $flags !~ /n/ );
80 my $never_returns = ( $flags =~ /r/ );
81 my $commented_out = ( $flags =~ /m/ );
82 my $binarycompat = ( $flags =~ /b/ );
83 my $is_malloc = ( $flags =~ /a/ );
84 my $can_ignore = ( $flags !~ /R/ ) && !$is_malloc;
88 if (! $can_ignore && $retval eq 'void') {
89 warn "It is nonsensical to require the return value of a void function ($plain_func) to be checked";
92 my $scope_type_flag_count = 0;
93 $scope_type_flag_count++ if $flags =~ /s/;
94 $scope_type_flag_count++ if $flags =~ /i/;
95 $scope_type_flag_count++ if $flags =~ /p/;
96 warn "$plain_func: i, p, and s flags are all mutually exclusive"
97 if $scope_type_flag_count > 1;
98 my $splint_flags = "";
99 if ( $SPLINT && !$commented_out ) {
100 $splint_flags .= '/*@noreturn@*/ ' if $never_returns;
101 if ($can_ignore && ($retval ne 'void') && ($retval !~ /\*/)) {
102 $retval .= " /*\@alt void\@*/";
106 if ($flags =~ /([si])/) {
108 if ($never_returns) {
109 $type = $1 eq 's' ? "PERL_STATIC_NO_RET" : "PERL_STATIC_INLINE_NO_RET";
112 $type = $1 eq 's' ? "STATIC" : "PERL_STATIC_INLINE";
114 $retval = "$type $splint_flags$retval";
117 if ($never_returns) {
118 $retval = "PERL_CALLCONV_NO_RET $splint_flags$retval";
121 $retval = "PERL_CALLCONV $splint_flags$retval";
124 $func = full_name($plain_func, $flags);
125 $ret = "$retval\t$func(";
126 if ( $has_context ) {
127 $ret .= @args ? "pTHX_ " : "pTHX";
131 for my $arg ( @args ) {
133 if ( $arg =~ /\*/ && $arg !~ /\b(NN|NULLOK)\b/ ) {
134 warn "$func: $arg needs NN or NULLOK\n";
135 ++$unflagged_pointers;
137 my $nn = ( $arg =~ s/\s*\bNN\b\s+// );
138 push( @nonnull, $n ) if $nn;
140 my $nullok = ( $arg =~ s/\s*\bNULLOK\b\s+// ); # strip NULLOK with no effect
142 # Make sure each arg has at least a type and a var name.
143 # An arg of "int" is valid C, but want it to be "int foo".
145 $temp_arg =~ s/\*//g;
146 $temp_arg =~ s/\s*\bstruct\b\s*/ /g;
147 if ( ($temp_arg ne "...")
148 && ($temp_arg !~ /\w+\s+(\w+)(?:\[\d+\])?\s*$/) ) {
149 warn "$func: $arg ($n) doesn't have a name\n";
151 if ( $SPLINT && $nullok && !$commented_out ) {
152 $arg = '/*@null@*/ ' . $arg;
154 if (defined $1 && $nn && !($commented_out && !$binarycompat)) {
155 push @names_of_nn, $1;
158 $ret .= join ", ", @args;
161 $ret .= "void" if !$has_context;
165 if ( $flags =~ /r/ ) {
166 push @attrs, "__attribute__noreturn__";
168 if ( $flags =~ /D/ ) {
169 push @attrs, "__attribute__deprecated__";
172 push @attrs, "__attribute__malloc__";
174 if ( !$can_ignore ) {
175 push @attrs, "__attribute__warn_unused_result__";
177 if ( $flags =~ /P/ ) {
178 push @attrs, "__attribute__pure__";
180 if( $flags =~ /f/ ) {
181 my $prefix = $has_context ? 'pTHX_' : '';
182 my $args = scalar @args;
184 my $macro = @nonnull && $nonnull[-1] == $pat
185 ? '__attribute__format__'
186 : '__attribute__format__null_ok__';
187 push @attrs, sprintf "%s(__printf__,%s%d,%s%d)", $macro,
188 $prefix, $pat, $prefix, $args;
191 my @pos = map { $has_context ? "pTHX_$_" : $_ } @nonnull;
192 push @attrs, map { sprintf( "__attribute__nonnull__(%s)", $_ ) } @pos;
196 $ret .= join( "\n", map { "\t\t\t$_" } @attrs );
199 $ret = "/* $ret */" if $commented_out;
201 $ret .= "\n#define PERL_ARGS_ASSERT_\U$plain_func\E\t\\\n\t"
202 . join '; ', map "assert($_)", @names_of_nn;
204 $ret .= @attrs ? "\n\n" : "\n";
211 # include "pp_proto.h"
216 read_only_bottom_close_and_rename($pr);
219 warn "$unflagged_pointers pointer arguments to clean up\n" if $unflagged_pointers;
222 my ($file, $pre) = @_;
225 open(FILE, "< $file")
226 or die "embed.pl: Can't open $file: $!\n";
228 s/[ \t]*#.*//; # Delete comments.
229 if (/PERLVARA?I?C?\($pre,\s*(\w+)/) {
230 warn "duplicate symbol $1 while processing $file line $.\n"
235 return sort keys %seen;
238 my @intrp = readvars 'intrpvar.h','I';
239 my @globvar = readvars 'perlvars.h','G';
242 my ($from, $to, $indent) = @_;
243 $indent = '' unless defined $indent;
244 my $t = int(length("$indent$from") / 8);
245 "#${indent}define $from" . "\t" x ($t < 3 ? 3 - $t : 1) . "$to\n";
249 my ($sym,$pre,$ptr) = @_;
250 hide("PL_$sym", "($ptr$pre$sym)");
253 my $em = open_print_header('embed.h');
256 /* (Doing namespace management portably in C is really gross.) */
258 /* By defining PERL_NO_SHORT_NAMES (not done by default) the short forms
259 * (like warn instead of Perl_warn) for the API are not defined.
260 * Not defining the short forms is a good thing for cleaner embedding. */
262 #ifndef PERL_NO_SHORT_NAMES
264 /* Hide global symbols */
271 my ($guard, $funcs) = @_;
272 print $em "$guard\n" if $guard;
278 # Indent the conditionals if we are wrapped in an #if/#endif pair.
279 $cond =~ s/#(.*)/# $1/ if $guard;
284 my ($flags,$retval,$func,@args) = @$_;
285 unless ($flags =~ /[om]/) {
286 my $args = scalar @args;
288 $ret = hide($func, full_name($func, $flags));
290 elsif ($args and $args[$args-1] =~ /\.\.\./) {
292 # we're out of luck for varargs functions under CPP
293 # So we can only do these macros for no implicit context:
294 $ret = "#ifndef PERL_IMPLICIT_CONTEXT\n"
295 . hide($func, full_name($func, $flags)) . "#endif\n";
299 my $alist = join(",", @az[0..$args-1]);
300 $ret = "#define $func($alist)";
301 my $t = int(length($ret) / 8);
302 $ret .= "\t" x ($t < 4 ? 4 - $t : 1);
303 $ret .= full_name($func, $flags) . "(aTHX";
304 $ret .= "_ " if $alist;
305 $ret .= $alist . ")\n";
310 # Prune empty #if/#endif pairs.
311 while ($lines =~ s/#\s*if[^\n]+\n#\s*endif\n//) {
313 # Merge adjacent blocks.
314 while ($lines =~ s/(#ifndef PERL_IMPLICIT_CONTEXT
317 #ifndef PERL_IMPLICIT_CONTEXT
322 print $em "#endif\n" if $guard;
326 embed_h('#if defined(PERL_CORE) || defined(PERL_EXT)', $ext);
327 embed_h('#ifdef PERL_CORE', $core);
331 #endif /* #ifndef PERL_NO_SHORT_NAMES */
333 /* Compatibility stubs. Compile extensions with -DPERL_NOCOMPAT to
337 #if !defined(PERL_CORE)
338 # define sv_setptrobj(rv,ptr,name) sv_setref_iv(rv,name,PTR2IV(ptr))
339 # define sv_setptrref(rv,ptr) sv_setref_iv(rv,NULL,PTR2IV(ptr))
342 #if !defined(PERL_CORE) && !defined(PERL_NOCOMPAT)
344 /* Compatibility for various misnamed functions. All functions
345 in the API that begin with "perl_" (not "Perl_") take an explicit
346 interpreter context pointer.
347 The following are not like that, but since they had a "perl_"
348 prefix in previous versions, we provide compatibility macros.
350 # define perl_atexit(a,b) call_atexit(a,b)
354 my ($flags, $retval, $func, @args) = @$_;
356 next unless $flags =~ /O/;
358 my $alist = join ",", @az[0..$#args];
359 my $ret = "# define perl_$func($alist)";
360 my $t = (length $ret) >> 3;
361 $ret .= "\t" x ($t < 5 ? 5 - $t : 1);
362 print $em "$ret$func($alist)\n";
367 my (%has_va, %has_nocontext);
370 ++$has_va{$_->[2]} if $_->[-1] =~ /\.\.\./;
371 ++$has_nocontext{$1} if $_->[2] =~ /(.*)_nocontext/;
374 @nocontext = sort grep {
376 && !/printf/ # Not clear to me why these are skipped but they are.
382 /* varargs functions can't be handled with CPP macros. :-(
383 This provides a set of compatibility functions that don't take
384 an extra argument but grab the context pointer using the macro
387 #if defined(PERL_IMPLICIT_CONTEXT) && !defined(PERL_NO_SHORT_NAMES)
390 foreach (@nocontext) {
391 print $em hide($_, "Perl_${_}_nocontext", " ");
397 #endif /* !defined(PERL_CORE) && !defined(PERL_NOCOMPAT) */
399 #if !defined(PERL_IMPLICIT_CONTEXT)
400 /* undefined symbols, point them back at the usual ones */
403 foreach (@nocontext) {
404 print $em hide("Perl_${_}_nocontext", "Perl_$_", " ");
411 read_only_bottom_close_and_rename($em);
413 $em = open_print_header('embedvar.h');
416 /* (Doing namespace management portably in C is really gross.) */
419 The following combinations of MULTIPLICITY and PERL_IMPLICIT_CONTEXT
422 2) MULTIPLICITY # supported for compatibility
423 3) MULTIPLICITY && PERL_IMPLICIT_CONTEXT
425 All other combinations of these flags are errors.
427 only #3 is supported directly, while #2 is a special
428 case of #3 (supported by redefining vTHX appropriately).
431 #if defined(MULTIPLICITY)
432 /* cases 2 and 3 above */
434 # if defined(PERL_IMPLICIT_CONTEXT)
437 # define vTHX PERL_GET_INTERP
445 if ($sym eq 'sawampersand') {
446 print $em "#ifndef PL_sawampersand\n";
448 print $em multon($sym,'I','vTHX->');
449 if ($sym eq 'sawampersand') {
450 print $em "#endif\n";
456 #endif /* MULTIPLICITY */
458 #if defined(PERL_GLOBAL_STRUCT)
462 for $sym (@globvar) {
463 print $em "#ifdef OS2\n" if $sym eq 'sh_path';
464 print $em multon($sym, 'G','my_vars->');
465 print $em multon("G$sym",'', 'my_vars->');
466 print $em "#endif\n" if $sym eq 'sh_path';
471 #endif /* PERL_GLOBAL_STRUCT */
474 read_only_bottom_close_and_rename($em);
476 my $capih = open_print_header('perlapi.h');
478 print $capih <<'EOT';
479 /* declare accessor functions for Perl variables */
480 #ifndef __perlapi_h__
481 #define __perlapi_h__
483 #if defined (MULTIPLICITY) && defined (PERL_GLOBAL_STRUCT)
491 #define PERLVAR(p,v,t) EXTERN_C t* Perl_##p##v##_ptr(pTHX);
492 #define PERLVARA(p,v,n,t) typedef t PL_##v##_t[n]; \
493 EXTERN_C PL_##v##_t* Perl_##p##v##_ptr(pTHX);
494 #define PERLVARI(p,v,t,i) PERLVAR(p,v,t)
495 #define PERLVARIC(p,v,t,i) PERLVAR(p,v, const t)
497 #include "perlvars.h"
506 #if defined(PERL_CORE)
508 /* accessor functions for Perl "global" variables */
510 /* these need to be mentioned here, or most linkers won't put them in
511 the perl executable */
513 #ifndef PERL_NO_FORCE_LINK
518 EXTCONST void * const PL_force_link_funcs[];
520 EXTCONST void * const PL_force_link_funcs[] = {
525 #define PERLVAR(p,v,t) (void*)Perl_##p##v##_ptr,
526 #define PERLVARA(p,v,n,t) PERLVAR(p,v,t)
527 #define PERLVARI(p,v,t,i) PERLVAR(p,v,t)
528 #define PERLVARIC(p,v,t,i) PERLVAR(p,v,t)
530 /* In Tru64 (__DEC && __osf__) the cc option -std1 causes that one
531 * cannot cast between void pointers and function pointers without
532 * info level warnings. The PL_force_link_funcs[] would cause a few
533 * hundred of those warnings. In code one can circumnavigate this by using
534 * unions that overlay the different pointers, but in declarations one
535 * cannot use this trick. Therefore we just disable the warning here
536 * for the duration of the PL_force_link_funcs[] declaration. */
538 #if defined(__DECC) && defined(__osf__)
540 #pragma message disable (nonstandcast)
543 #include "perlvars.h"
545 #if defined(__DECC) && defined(__osf__)
546 #pragma message restore
558 #endif /* PERL_NO_FORCE_LINK */
560 #else /* !PERL_CORE */
564 foreach $sym (@globvar) {
566 "#undef PL_$sym\n" . hide("PL_$sym", "(*Perl_G${sym}_ptr(NULL))");
569 print $capih <<'EOT';
571 #endif /* !PERL_CORE */
572 #endif /* MULTIPLICITY && PERL_GLOBAL_STRUCT */
574 #endif /* __perlapi_h__ */
577 read_only_bottom_close_and_rename($capih);
579 my $capi = open_print_header('perlapi.c', <<'EOQ');
582 * Up to the threshold of the door there mounted a flight of twenty-seven
583 * broad stairs, hewn by some unknown art of the same black stone. This
584 * was the only entrance to the tower; ...
586 * [p.577 of _The Lord of the Rings_, III/x: "The Voice of Saruman"]
596 #if defined (MULTIPLICITY) && defined (PERL_GLOBAL_STRUCT)
598 /* accessor functions for Perl "global" variables */
602 #define PERLVARI(p,v,t,i) PERLVAR(p,v,t)
606 #define PERLVAR(p,v,t) t* Perl_##p##v##_ptr(pTHX) \
607 { dVAR; PERL_UNUSED_CONTEXT; return &(PL_##v); }
608 #define PERLVARA(p,v,n,t) PL_##v##_t* Perl_##p##v##_ptr(pTHX) \
609 { dVAR; PERL_UNUSED_CONTEXT; return &(PL_##v); }
611 #define PERLVARIC(p,v,t,i) \
612 const t* Perl_##p##v##_ptr(pTHX) \
613 { PERL_UNUSED_CONTEXT; return (const t *)&(PL_##v); }
614 #include "perlvars.h"
623 #endif /* MULTIPLICITY && PERL_GLOBAL_STRUCT */
626 read_only_bottom_close_and_rename($capi);
628 # ex: set ts=8 sts=4 sw=4 noet: