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1 | |
| 2 | package Devel::PPPort; |
| 3 | |
| 4 | =head1 NAME |
| 5 | |
| 6 | Perl/Pollution/Portability |
| 7 | |
| 8 | =head1 SYNOPSIS |
| 9 | |
| 10 | Devel::PPPort::WriteFile() ; # defaults to ./ppport.h |
| 11 | Devel::PPPort::WriteFile('someheader.h') ; |
| 12 | |
| 13 | =head1 DESCRIPTION |
| 14 | |
| 44284200 |
15 | Perl has changed over time, gaining new features, new functions, |
| 16 | increasing its flexibility, and reducing the impact on the C namespace |
| 17 | environment (reduced pollution). The header file, typicaly C<ppport.h>, |
| 18 | written by this module attempts to bring some of the newer Perl |
| 19 | features to older versions of Perl, so that you can worry less about |
| 20 | keeping track of old releases, but users can still reap the benefit. |
| 21 | |
| 22 | Why you should use C<ppport.h> in modern code: so that your code will work |
| 23 | with the widest range of Perl interpreters possible, without significant |
| 24 | additional work. |
| 25 | |
| 26 | Why you should attempt older code to fully use C<ppport.h>: because |
| 27 | the reduced pollution of newer Perl versions is an important thing, so |
| 28 | important that the old polluting ways of original Perl modules will not be |
| 29 | supported very far into the future, and your module will almost certainly |
| 30 | break! By adapting to it now, you'll gained compatibility and a sense of |
| 31 | having done the electronic ecology some good. |
| 32 | |
| 33 | How to use ppport.h: Don't direct the user to download C<Devel::PPPort>, |
| 34 | and don't make C<ppport.h> optional. Rather, just take the most recent |
| 35 | copy of C<ppport.h> that you can find (probably in C<Devel::PPPort> |
| 36 | on CPAN), copy it into your project, adjust your project to use it, |
| 37 | and distribute the header along with your module. |
| 38 | |
| 39 | C<Devel::PPPort> contains a single function, called C<WriteFile>. It's |
| 40 | purpose is to write a 'C' header file that is used when writing XS |
| 41 | modules. The file contains a series of macros that allow XS modules to |
| 42 | be built using older versions of Perl. |
| 43 | |
| 44 | This module is used by h2xs to write the file F<ppport.h>. |
| 0a7c7f4f |
45 | |
| 46 | =head2 WriteFile |
| 47 | |
| 48 | C<WriteFile> takes a zero or one parameters. When called with one |
| 49 | parameter it expects to be passed a filename. When called with no |
| 50 | parameters, it defults to the filename C<./pport.h>. |
| 51 | |
| 52 | The function returns TRUE if the file was written successfully. Otherwise |
| 53 | it returns FALSE. |
| 54 | |
| 44284200 |
55 | =head1 ppport.h |
| 56 | |
| 57 | The file written by this module, typically C<ppport.h>, provides access |
| 9e19d553 |
58 | to the following Perl API if not already available (and in some cases [*] |
| 59 | even if available, access to a fixed interface): |
| 44284200 |
60 | |
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61 | aMY_CXT |
| 62 | aMY_CXT_ |
| 63 | _aMY_CXT |
| 64 | aTHX |
| 65 | aTHX_ |
| 66 | AvFILLp |
| 67 | boolSV(b) |
| 44284200 |
68 | DEFSV |
| 9e19d553 |
69 | dMY_CXT |
| 70 | dMY_CXT_SV |
| 71 | dNOOP |
| 72 | dTHR |
| 73 | dTHX |
| 74 | dTHXa |
| 75 | dTHXoa |
| 44284200 |
76 | ERRSV |
| 9e19d553 |
77 | gv_stashpvn(str,len,flags) |
| 78 | INT2PTR(type,int) |
| 79 | IVdf |
| 44284200 |
80 | MY_CXT |
| 81 | MY_CXT_INIT |
| 9e19d553 |
82 | newCONSTSUB(stash,name,sv) |
| 83 | newRV_inc(sv) |
| 84 | newRV_noinc(sv) |
| 85 | newSVpvn(data,len) |
| 44284200 |
86 | NOOP |
| 9e19d553 |
87 | NV |
| 88 | NVef |
| 89 | NVff |
| 90 | NVgf |
| 44284200 |
91 | PERL_REVISION |
| 92 | PERL_SUBVERSION |
| 93 | PERL_UNUSED_DECL |
| 9e19d553 |
94 | PERL_UNUSED_DECL |
| 44284200 |
95 | PERL_VERSION |
| 44284200 |
96 | PL_compiling |
| 97 | PL_copline |
| 98 | PL_curcop |
| 99 | PL_curstash |
| 100 | PL_defgv |
| 101 | PL_dirty |
| 102 | PL_hints |
| 103 | PL_na |
| 104 | PL_perldb |
| 105 | PL_rsfp_filters |
| 106 | PL_rsfpv |
| 107 | PL_stdingv |
| 9e19d553 |
108 | PL_Sv |
| 44284200 |
109 | PL_sv_no |
| 110 | PL_sv_undef |
| 111 | PL_sv_yes |
| 44284200 |
112 | pMY_CXT |
| 113 | pMY_CXT_ |
| 9e19d553 |
114 | _pMY_CXT |
| 44284200 |
115 | pTHX |
| 116 | pTHX_ |
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117 | PTR2IV(ptr) |
| 118 | PTR2NV(ptr) |
| 119 | PTR2ul(ptr) |
| 120 | PTR2UV(ptr) |
| 121 | SAVE_DEFSV |
| 122 | START_MY_CXT |
| 123 | SvPVbyte(sv,lp) [*] |
| 124 | UVof |
| 125 | UVSIZE |
| 126 | UVuf |
| 127 | UVxf |
| 128 | UVXf |
| 44284200 |
129 | |
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130 | =head1 AUTHOR |
| 131 | |
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132 | Version 1.x of Devel::PPPort was written by Kenneth Albanowski. |
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133 | |
| dbda3434 |
134 | Version 2.x was ported to the Perl core by Paul Marquess. |
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135 | |
| 136 | =head1 SEE ALSO |
| 137 | |
| 138 | See L<h2xs>. |
| 139 | |
| 140 | =cut |
| 141 | |
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142 | |
| 143 | package Devel::PPPort; |
| 144 | |
| 145 | require Exporter; |
| 146 | require DynaLoader; |
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147 | #use warnings; |
| 148 | use strict; |
| 44284200 |
149 | use vars qw( $VERSION @ISA @EXPORT @EXPORT_OK $data ); |
| 150 | |
| 151 | $VERSION = "2.0002"; |
| 152 | |
| 153 | @ISA = qw(Exporter DynaLoader); |
| 154 | @EXPORT = qw(); |
| 155 | # Other items we are prepared to export if requested |
| 156 | @EXPORT_OK = qw( ); |
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157 | |
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158 | bootstrap Devel::PPPort; |
| 159 | |
| 160 | package Devel::PPPort; |
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161 | |
| 162 | { |
| 163 | local $/ = undef; |
| 164 | $data = <DATA> ; |
| 165 | my $now = localtime; |
| 166 | my $pkg = __PACKAGE__; |
| dbda3434 |
167 | $data =~ s/__VERSION__/$VERSION/g; |
| 168 | $data =~ s/__DATE__/$now/g; |
| 169 | $data =~ s/__PKG__/$pkg/g; |
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170 | } |
| 171 | |
| 172 | sub WriteFile |
| 173 | { |
| 174 | my $file = shift || 'ppport.h' ; |
| 175 | |
| 176 | open F, ">$file" || return undef ; |
| 177 | print F $data ; |
| 178 | close F; |
| 179 | |
| 180 | return 1 ; |
| 181 | } |
| 182 | |
| 183 | 1; |
| 184 | |
| 185 | __DATA__; |
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186 | |
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187 | /* ppport.h -- Perl/Pollution/Portability Version __VERSION__ |
| 188 | * |
| 189 | * Automatically Created by __PKG__ on __DATE__ |
| 190 | * |
| 191 | * Do NOT edit this file directly! -- Edit PPPort.pm instead. |
| 192 | * |
| 193 | * Version 2.x, Copyright (C) 2001, Paul Marquess. |
| 194 | * Version 1.x, Copyright (C) 1999, Kenneth Albanowski. |
| 195 | * This code may be used and distributed under the same license as any |
| 196 | * version of Perl. |
| 197 | * |
| 198 | * This version of ppport.h is designed to support operation with Perl |
| 199 | * installations back to 5.004, and has been tested up to 5.8.0. |
| 200 | * |
| 201 | * If this version of ppport.h is failing during the compilation of this |
| 202 | * module, please check if a newer version of Devel::PPPort is available |
| 203 | * on CPAN before sending a bug report. |
| 204 | * |
| 205 | * If you are using the latest version of Devel::PPPort and it is failing |
| 206 | * during compilation of this module, please send a report to perlbug@perl.com |
| 207 | * |
| 208 | * Include all following information: |
| 209 | * |
| 210 | * 1. The complete output from running "perl -V" |
| 211 | * |
| 212 | * 2. This file. |
| 213 | * |
| 214 | * 3. The name & version of the module you were trying to build. |
| 215 | * |
| 216 | * 4. A full log of the build that failed. |
| 217 | * |
| 218 | * 5. Any other information that you think could be relevant. |
| 219 | * |
| 220 | * |
| 221 | * For the latest version of this code, please retreive the Devel::PPPort |
| 222 | * module from CPAN. |
| 223 | * |
| 224 | */ |
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225 | |
| 226 | /* |
| 44284200 |
227 | * In order for a Perl extension module to be as portable as possible |
| 228 | * across differing versions of Perl itself, certain steps need to be taken. |
| 229 | * Including this header is the first major one, then using dTHR is all the |
| 230 | * appropriate places and using a PL_ prefix to refer to global Perl |
| 231 | * variables is the second. |
| 232 | * |
| 233 | */ |
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234 | |
| 235 | |
| 236 | /* If you use one of a few functions that were not present in earlier |
| 44284200 |
237 | * versions of Perl, please add a define before the inclusion of ppport.h |
| 238 | * for a static include, or use the GLOBAL request in a single module to |
| 239 | * produce a global definition that can be referenced from the other |
| 240 | * modules. |
| 241 | * |
| 242 | * Function: Static define: Extern define: |
| 243 | * newCONSTSUB() NEED_newCONSTSUB NEED_newCONSTSUB_GLOBAL |
| 244 | * |
| 245 | */ |
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246 | |
| 247 | |
| 248 | /* To verify whether ppport.h is needed for your module, and whether any |
| 44284200 |
249 | * special defines should be used, ppport.h can be run through Perl to check |
| 250 | * your source code. Simply say: |
| 251 | * |
| 20d72259 |
252 | * perl -x ppport.h *.c *.h *.xs foo/bar*.c [etc] |
| 44284200 |
253 | * |
| 254 | * The result will be a list of patches suggesting changes that should at |
| 255 | * least be acceptable, if not necessarily the most efficient solution, or a |
| 256 | * fix for all possible problems. It won't catch where dTHR is needed, and |
| 257 | * doesn't attempt to account for global macro or function definitions, |
| 258 | * nested includes, typemaps, etc. |
| 259 | * |
| 260 | * In order to test for the need of dTHR, please try your module under a |
| 261 | * recent version of Perl that has threading compiled-in. |
| 262 | * |
| 263 | */ |
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264 | |
| 265 | |
| 266 | /* |
| 267 | #!/usr/bin/perl |
| 268 | @ARGV = ("*.xs") if !@ARGV; |
| 269 | %badmacros = %funcs = %macros = (); $replace = 0; |
| 270 | foreach (<DATA>) { |
| 271 | $funcs{$1} = 1 if /Provide:\s+(\S+)/; |
| 272 | $macros{$1} = 1 if /^#\s*define\s+([a-zA-Z0-9_]+)/; |
| 273 | $replace = $1 if /Replace:\s+(\d+)/; |
| 274 | $badmacros{$2}=$1 if $replace and /^#\s*define\s+([a-zA-Z0-9_]+).*?\s+([a-zA-Z0-9_]+)/; |
| 275 | $badmacros{$1}=$2 if /Replace (\S+) with (\S+)/; |
| 276 | } |
| 277 | foreach $filename (map(glob($_),@ARGV)) { |
| 278 | unless (open(IN, "<$filename")) { |
| 279 | warn "Unable to read from $file: $!\n"; |
| 280 | next; |
| 281 | } |
| 282 | print "Scanning $filename...\n"; |
| 283 | $c = ""; while (<IN>) { $c .= $_; } close(IN); |
| 284 | $need_include = 0; %add_func = (); $changes = 0; |
| 285 | $has_include = ($c =~ /#.*include.*ppport/m); |
| 286 | |
| 287 | foreach $func (keys %funcs) { |
| 288 | if ($c =~ /#.*define.*\bNEED_$func(_GLOBAL)?\b/m) { |
| 289 | if ($c !~ /\b$func\b/m) { |
| 290 | print "If $func isn't needed, you don't need to request it.\n" if |
| 291 | $changes += ($c =~ s/^.*#.*define.*\bNEED_$func\b.*\n//m); |
| 292 | } else { |
| 293 | print "Uses $func\n"; |
| 294 | $need_include = 1; |
| 295 | } |
| 296 | } else { |
| 297 | if ($c =~ /\b$func\b/m) { |
| 298 | $add_func{$func} =1 ; |
| 299 | print "Uses $func\n"; |
| 300 | $need_include = 1; |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | if (not $need_include) { |
| 306 | foreach $macro (keys %macros) { |
| 307 | if ($c =~ /\b$macro\b/m) { |
| 308 | print "Uses $macro\n"; |
| 309 | $need_include = 1; |
| 310 | } |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | foreach $badmacro (keys %badmacros) { |
| 315 | if ($c =~ /\b$badmacro\b/m) { |
| 316 | $changes += ($c =~ s/\b$badmacro\b/$badmacros{$badmacro}/gm); |
| 317 | print "Uses $badmacros{$badmacro} (instead of $badmacro)\n"; |
| 318 | $need_include = 1; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | if (scalar(keys %add_func) or $need_include != $has_include) { |
| 323 | if (!$has_include) { |
| 324 | $inc = join('',map("#define NEED_$_\n", sort keys %add_func)). |
| 325 | "#include \"ppport.h\"\n"; |
| 326 | $c = "$inc$c" unless $c =~ s/#.*include.*XSUB.*\n/$&$inc/m; |
| 327 | } elsif (keys %add_func) { |
| 328 | $inc = join('',map("#define NEED_$_\n", sort keys %add_func)); |
| 329 | $c = "$inc$c" unless $c =~ s/^.*#.*include.*ppport.*$/$inc$&/m; |
| 330 | } |
| 331 | if (!$need_include) { |
| 332 | print "Doesn't seem to need ppport.h.\n"; |
| 333 | $c =~ s/^.*#.*include.*ppport.*\n//m; |
| 334 | } |
| 335 | $changes++; |
| 336 | } |
| 337 | |
| 338 | if ($changes) { |
| 339 | open(OUT,">/tmp/ppport.h.$$"); |
| 340 | print OUT $c; |
| 341 | close(OUT); |
| 342 | open(DIFF, "diff -u $filename /tmp/ppport.h.$$|"); |
| 343 | while (<DIFF>) { s!/tmp/ppport\.h\.$$!$filename.patched!; print STDOUT; } |
| 344 | close(DIFF); |
| 345 | unlink("/tmp/ppport.h.$$"); |
| 346 | } else { |
| 347 | print "Looks OK\n"; |
| 348 | } |
| 349 | } |
| 350 | __DATA__ |
| 351 | */ |
| 352 | |
| 44284200 |
353 | #ifndef _P_P_PORTABILITY_H_ |
| 354 | #define _P_P_PORTABILITY_H_ |
| 355 | |
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356 | #ifndef PERL_REVISION |
| 357 | # ifndef __PATCHLEVEL_H_INCLUDED__ |
| 069d7f71 |
358 | # include <patchlevel.h> |
| 359 | # endif |
| 360 | # ifndef PERL_VERSION |
| 361 | # include <could_not_find_Perl_patchlevel.h> |
| 0a7c7f4f |
362 | # endif |
| 363 | # ifndef PERL_REVISION |
| 364 | # define PERL_REVISION (5) |
| 365 | /* Replace: 1 */ |
| 366 | # define PERL_VERSION PATCHLEVEL |
| 367 | # define PERL_SUBVERSION SUBVERSION |
| 368 | /* Replace PERL_PATCHLEVEL with PERL_VERSION */ |
| 369 | /* Replace: 0 */ |
| 370 | # endif |
| 371 | #endif |
| 372 | |
| 373 | #define PERL_BCDVERSION ((PERL_REVISION * 0x1000000L) + (PERL_VERSION * 0x1000L) + PERL_SUBVERSION) |
| 374 | |
| 44284200 |
375 | /* It is very unlikely that anyone will try to use this with Perl 6 |
| 376 | (or greater), but who knows. |
| 377 | */ |
| 378 | #if PERL_REVISION != 5 |
| 379 | # error ppport.h only works with Perl version 5 |
| 380 | #endif /* PERL_REVISION != 5 */ |
| 381 | |
| 0a7c7f4f |
382 | #ifndef ERRSV |
| 383 | # define ERRSV perl_get_sv("@",FALSE) |
| 384 | #endif |
| 385 | |
| 386 | #if (PERL_VERSION < 4) || ((PERL_VERSION == 4) && (PERL_SUBVERSION <= 5)) |
| 387 | /* Replace: 1 */ |
| 388 | # define PL_Sv Sv |
| 389 | # define PL_compiling compiling |
| 390 | # define PL_copline copline |
| 391 | # define PL_curcop curcop |
| 392 | # define PL_curstash curstash |
| 393 | # define PL_defgv defgv |
| 394 | # define PL_dirty dirty |
| b9381339 |
395 | # define PL_dowarn dowarn |
| 0a7c7f4f |
396 | # define PL_hints hints |
| 397 | # define PL_na na |
| 398 | # define PL_perldb perldb |
| 399 | # define PL_rsfp_filters rsfp_filters |
| 400 | # define PL_rsfpv rsfp |
| 401 | # define PL_stdingv stdingv |
| 402 | # define PL_sv_no sv_no |
| 403 | # define PL_sv_undef sv_undef |
| 404 | # define PL_sv_yes sv_yes |
| 405 | /* Replace: 0 */ |
| 406 | #endif |
| 407 | |
| 5a0bf5be |
408 | #ifdef HASATTRIBUTE |
| 409 | # if defined(__GNUC__) && defined(__cplusplus) |
| 410 | # define PERL_UNUSED_DECL |
| 411 | # else |
| 412 | # define PERL_UNUSED_DECL __attribute__((unused)) |
| 413 | # endif |
| 414 | #else |
| 415 | # define PERL_UNUSED_DECL |
| 416 | #endif |
| 417 | |
| 418 | #ifndef dNOOP |
| 419 | # define NOOP (void)0 |
| 420 | # define dNOOP extern int Perl___notused PERL_UNUSED_DECL |
| 421 | #endif |
| 422 | |
| 423 | #ifndef dTHR |
| 424 | # define dTHR dNOOP |
| 425 | #endif |
| 426 | |
| 427 | #ifndef dTHX |
| 428 | # define dTHX dNOOP |
| 429 | # define dTHXa(x) dNOOP |
| 430 | # define dTHXoa(x) dNOOP |
| 431 | #endif |
| 432 | |
| 0a7c7f4f |
433 | #ifndef pTHX |
| 5a0bf5be |
434 | # define pTHX void |
| 0a7c7f4f |
435 | # define pTHX_ |
| 436 | # define aTHX |
| 437 | # define aTHX_ |
| 438 | #endif |
| 439 | |
| a22cf627 |
440 | /* IV could also be a quad (say, a long long), but Perls |
| 441 | * capable of those should have IVSIZE already. */ |
| 442 | #if !defined(IVSIZE) && defined(LONGSIZE) |
| 443 | # define IVSIZE LONGSIZE |
| 444 | #endif |
| 445 | #ifndef IVSIZE |
| 446 | # define IVSIZE 4 /* A bold guess, but the best we can make. */ |
| 447 | #endif |
| 448 | |
| 0c8c7b4b |
449 | #ifndef UVSIZE |
| 450 | # define UVSIZE IVSIZE |
| 0a7c7f4f |
451 | #endif |
| 0c8c7b4b |
452 | |
| 453 | #ifndef NVTYPE |
| 454 | # if defined(USE_LONG_DOUBLE) && defined(HAS_LONG_DOUBLE) |
| 455 | # define NVTYPE long double |
| 456 | # else |
| 457 | # define NVTYPE double |
| 458 | # endif |
| 459 | typedef NVTYPE NV; |
| 460 | #endif |
| 461 | |
| 0a7c7f4f |
462 | #ifndef INT2PTR |
| 0c8c7b4b |
463 | |
| 464 | #if (IVSIZE == PTRSIZE) && (UVSIZE == PTRSIZE) |
| 465 | # define PTRV UV |
| 466 | # define INT2PTR(any,d) (any)(d) |
| 467 | #else |
| 468 | # if PTRSIZE == LONGSIZE |
| 469 | # define PTRV unsigned long |
| 470 | # else |
| 471 | # define PTRV unsigned |
| 472 | # endif |
| 473 | # define INT2PTR(any,d) (any)(PTRV)(d) |
| 474 | #endif |
| 475 | #define NUM2PTR(any,d) (any)(PTRV)(d) |
| 476 | #define PTR2IV(p) INT2PTR(IV,p) |
| 477 | #define PTR2UV(p) INT2PTR(UV,p) |
| 478 | #define PTR2NV(p) NUM2PTR(NV,p) |
| 479 | #if PTRSIZE == LONGSIZE |
| 480 | # define PTR2ul(p) (unsigned long)(p) |
| 481 | #else |
| 482 | # define PTR2ul(p) INT2PTR(unsigned long,p) |
| 0a7c7f4f |
483 | #endif |
| 484 | |
| 0c8c7b4b |
485 | #endif /* !INT2PTR */ |
| 486 | |
| 0a7c7f4f |
487 | #ifndef boolSV |
| 488 | # define boolSV(b) ((b) ? &PL_sv_yes : &PL_sv_no) |
| 489 | #endif |
| 490 | |
| 491 | #ifndef gv_stashpvn |
| 492 | # define gv_stashpvn(str,len,flags) gv_stashpv(str,flags) |
| 493 | #endif |
| 494 | |
| 495 | #ifndef newSVpvn |
| 496 | # define newSVpvn(data,len) ((len) ? newSVpv ((data), (len)) : newSVpv ("", 0)) |
| 497 | #endif |
| 498 | |
| 499 | #ifndef newRV_inc |
| 500 | /* Replace: 1 */ |
| 501 | # define newRV_inc(sv) newRV(sv) |
| 502 | /* Replace: 0 */ |
| 503 | #endif |
| 504 | |
| 505 | /* DEFSV appears first in 5.004_56 */ |
| 506 | #ifndef DEFSV |
| 507 | # define DEFSV GvSV(PL_defgv) |
| 508 | #endif |
| 509 | |
| 510 | #ifndef SAVE_DEFSV |
| 511 | # define SAVE_DEFSV SAVESPTR(GvSV(PL_defgv)) |
| 512 | #endif |
| 513 | |
| 514 | #ifndef newRV_noinc |
| 515 | # ifdef __GNUC__ |
| 516 | # define newRV_noinc(sv) \ |
| 517 | ({ \ |
| 518 | SV *nsv = (SV*)newRV(sv); \ |
| 519 | SvREFCNT_dec(sv); \ |
| 520 | nsv; \ |
| 521 | }) |
| 522 | # else |
| 9ede5bc8 |
523 | # if defined(USE_THREADS) |
| 0a7c7f4f |
524 | static SV * newRV_noinc (SV * sv) |
| 525 | { |
| 526 | SV *nsv = (SV*)newRV(sv); |
| 527 | SvREFCNT_dec(sv); |
| 528 | return nsv; |
| 529 | } |
| 530 | # else |
| 531 | # define newRV_noinc(sv) \ |
| 97dc1cde |
532 | (PL_Sv=(SV*)newRV(sv), SvREFCNT_dec(sv), (SV*)PL_Sv) |
| 0a7c7f4f |
533 | # endif |
| 534 | # endif |
| 535 | #endif |
| 536 | |
| 537 | /* Provide: newCONSTSUB */ |
| 538 | |
| 539 | /* newCONSTSUB from IO.xs is in the core starting with 5.004_63 */ |
| 540 | #if (PERL_VERSION < 4) || ((PERL_VERSION == 4) && (PERL_SUBVERSION < 63)) |
| 541 | |
| 542 | #if defined(NEED_newCONSTSUB) |
| 543 | static |
| 544 | #else |
| c68a00c0 |
545 | extern void newCONSTSUB(HV * stash, char * name, SV *sv); |
| 0a7c7f4f |
546 | #endif |
| 547 | |
| 548 | #if defined(NEED_newCONSTSUB) || defined(NEED_newCONSTSUB_GLOBAL) |
| 549 | void |
| 550 | newCONSTSUB(stash,name,sv) |
| 551 | HV *stash; |
| 552 | char *name; |
| 553 | SV *sv; |
| 554 | { |
| 555 | U32 oldhints = PL_hints; |
| 556 | HV *old_cop_stash = PL_curcop->cop_stash; |
| 557 | HV *old_curstash = PL_curstash; |
| 558 | line_t oldline = PL_curcop->cop_line; |
| 559 | PL_curcop->cop_line = PL_copline; |
| 560 | |
| 561 | PL_hints &= ~HINT_BLOCK_SCOPE; |
| 562 | if (stash) |
| 563 | PL_curstash = PL_curcop->cop_stash = stash; |
| 564 | |
| 565 | newSUB( |
| 566 | |
| 567 | #if (PERL_VERSION < 3) || ((PERL_VERSION == 3) && (PERL_SUBVERSION < 22)) |
| 568 | /* before 5.003_22 */ |
| 569 | start_subparse(), |
| 570 | #else |
| 571 | # if (PERL_VERSION == 3) && (PERL_SUBVERSION == 22) |
| 572 | /* 5.003_22 */ |
| 573 | start_subparse(0), |
| 574 | # else |
| 575 | /* 5.003_23 onwards */ |
| 576 | start_subparse(FALSE, 0), |
| 577 | # endif |
| 578 | #endif |
| 579 | |
| 580 | newSVOP(OP_CONST, 0, newSVpv(name,0)), |
| 581 | newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */ |
| 582 | newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv)) |
| 583 | ); |
| 584 | |
| 585 | PL_hints = oldhints; |
| 586 | PL_curcop->cop_stash = old_cop_stash; |
| 587 | PL_curstash = old_curstash; |
| 588 | PL_curcop->cop_line = oldline; |
| 589 | } |
| 590 | #endif |
| 591 | |
| 592 | #endif /* newCONSTSUB */ |
| 593 | |
| 0a7c7f4f |
594 | #ifndef START_MY_CXT |
| 595 | |
| 596 | /* |
| 597 | * Boilerplate macros for initializing and accessing interpreter-local |
| 598 | * data from C. All statics in extensions should be reworked to use |
| 599 | * this, if you want to make the extension thread-safe. See ext/re/re.xs |
| 600 | * for an example of the use of these macros. |
| 601 | * |
| 602 | * Code that uses these macros is responsible for the following: |
| 603 | * 1. #define MY_CXT_KEY to a unique string, e.g. "DynaLoader_guts" |
| 604 | * 2. Declare a typedef named my_cxt_t that is a structure that contains |
| 605 | * all the data that needs to be interpreter-local. |
| 606 | * 3. Use the START_MY_CXT macro after the declaration of my_cxt_t. |
| 607 | * 4. Use the MY_CXT_INIT macro such that it is called exactly once |
| 608 | * (typically put in the BOOT: section). |
| 609 | * 5. Use the members of the my_cxt_t structure everywhere as |
| 610 | * MY_CXT.member. |
| 611 | * 6. Use the dMY_CXT macro (a declaration) in all the functions that |
| 612 | * access MY_CXT. |
| 613 | */ |
| 614 | |
| 615 | #if defined(MULTIPLICITY) || defined(PERL_OBJECT) || \ |
| 616 | defined(PERL_CAPI) || defined(PERL_IMPLICIT_CONTEXT) |
| 617 | |
| 618 | /* This must appear in all extensions that define a my_cxt_t structure, |
| 619 | * right after the definition (i.e. at file scope). The non-threads |
| 620 | * case below uses it to declare the data as static. */ |
| 621 | #define START_MY_CXT |
| 622 | |
| 44284200 |
623 | #if (PERL_VERSION < 4 || (PERL_VERSION == 4 && PERL_SUBVERSION < 68 )) |
| 0a7c7f4f |
624 | /* Fetches the SV that keeps the per-interpreter data. */ |
| 625 | #define dMY_CXT_SV \ |
| 626 | SV *my_cxt_sv = perl_get_sv(MY_CXT_KEY, FALSE) |
| 627 | #else /* >= perl5.004_68 */ |
| 628 | #define dMY_CXT_SV \ |
| 629 | SV *my_cxt_sv = *hv_fetch(PL_modglobal, MY_CXT_KEY, \ |
| 630 | sizeof(MY_CXT_KEY)-1, TRUE) |
| 631 | #endif /* < perl5.004_68 */ |
| 632 | |
| 633 | /* This declaration should be used within all functions that use the |
| 634 | * interpreter-local data. */ |
| 635 | #define dMY_CXT \ |
| 636 | dMY_CXT_SV; \ |
| 637 | my_cxt_t *my_cxtp = INT2PTR(my_cxt_t*,SvUV(my_cxt_sv)) |
| 638 | |
| 639 | /* Creates and zeroes the per-interpreter data. |
| 640 | * (We allocate my_cxtp in a Perl SV so that it will be released when |
| 641 | * the interpreter goes away.) */ |
| 642 | #define MY_CXT_INIT \ |
| 643 | dMY_CXT_SV; \ |
| 644 | /* newSV() allocates one more than needed */ \ |
| 645 | my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1));\ |
| 646 | Zero(my_cxtp, 1, my_cxt_t); \ |
| 647 | sv_setuv(my_cxt_sv, PTR2UV(my_cxtp)) |
| 648 | |
| 649 | /* This macro must be used to access members of the my_cxt_t structure. |
| 650 | * e.g. MYCXT.some_data */ |
| 651 | #define MY_CXT (*my_cxtp) |
| 652 | |
| 653 | /* Judicious use of these macros can reduce the number of times dMY_CXT |
| 654 | * is used. Use is similar to pTHX, aTHX etc. */ |
| 655 | #define pMY_CXT my_cxt_t *my_cxtp |
| 656 | #define pMY_CXT_ pMY_CXT, |
| 657 | #define _pMY_CXT ,pMY_CXT |
| 658 | #define aMY_CXT my_cxtp |
| 659 | #define aMY_CXT_ aMY_CXT, |
| 660 | #define _aMY_CXT ,aMY_CXT |
| 661 | |
| 662 | #else /* single interpreter */ |
| 663 | |
| 0a7c7f4f |
664 | #define START_MY_CXT static my_cxt_t my_cxt; |
| 665 | #define dMY_CXT_SV dNOOP |
| 666 | #define dMY_CXT dNOOP |
| 667 | #define MY_CXT_INIT NOOP |
| 668 | #define MY_CXT my_cxt |
| 669 | |
| 670 | #define pMY_CXT void |
| 671 | #define pMY_CXT_ |
| 672 | #define _pMY_CXT |
| 673 | #define aMY_CXT |
| 674 | #define aMY_CXT_ |
| 675 | #define _aMY_CXT |
| 676 | |
| 677 | #endif |
| 678 | |
| 679 | #endif /* START_MY_CXT */ |
| 680 | |
| 4b729f51 |
681 | #ifndef IVdf |
| 682 | # if IVSIZE == LONGSIZE |
| 683 | # define IVdf "ld" |
| 684 | # define UVuf "lu" |
| 685 | # define UVof "lo" |
| 686 | # define UVxf "lx" |
| 687 | # define UVXf "lX" |
| 688 | # else |
| 689 | # if IVSIZE == INTSIZE |
| 690 | # define IVdf "d" |
| 691 | # define UVuf "u" |
| 692 | # define UVof "o" |
| 693 | # define UVxf "x" |
| 694 | # define UVXf "X" |
| 695 | # endif |
| 696 | # endif |
| 697 | #endif |
| 698 | |
| 699 | #ifndef NVef |
| 700 | # if defined(USE_LONG_DOUBLE) && defined(HAS_LONG_DOUBLE) && \ |
| 701 | defined(PERL_PRIfldbl) /* Not very likely, but let's try anyway. */ |
| 702 | # define NVef PERL_PRIeldbl |
| 703 | # define NVff PERL_PRIfldbl |
| 704 | # define NVgf PERL_PRIgldbl |
| 705 | # else |
| 706 | # define NVef "e" |
| 707 | # define NVff "f" |
| 708 | # define NVgf "g" |
| 709 | # endif |
| 710 | #endif |
| 711 | |
| 4b729f51 |
712 | #ifndef AvFILLp /* Older perls (<=5.003) lack AvFILLp */ |
| 713 | # define AvFILLp AvFILL |
| 714 | #endif |
| 715 | |
| 9e19d553 |
716 | #ifdef SvPVbyte |
| 717 | # if PERL_REVISION == 5 && PERL_VERSION < 7 |
| 718 | /* SvPVbyte does not work in perl-5.6.1, borrowed version for 5.7.3 */ |
| 719 | # undef SvPVbyte |
| 720 | # define SvPVbyte(sv, lp) \ |
| 721 | ((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \ |
| 722 | ? ((lp = SvCUR(sv)), SvPVX(sv)) : my_sv_2pvbyte(aTHX_ sv, &lp)) |
| 723 | static char * |
| 724 | my_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp) |
| 725 | { |
| 726 | sv_utf8_downgrade(sv,0); |
| 727 | return SvPV(sv,*lp); |
| 728 | } |
| 729 | # endif |
| 730 | #else |
| 731 | # define SvPVbyte SvPV |
| 732 | #endif |
| 733 | |
| a22cf627 |
734 | #ifndef SvPV_nolen |
| 735 | # define SvPV_nolen(sv) \ |
| 736 | ((SvFLAGS(sv) & (SVf_POK)) == SVf_POK \ |
| 737 | ? SvPVX(sv) : sv_2pv_nolen(sv)) |
| 738 | static char * |
| 739 | sv_2pv_nolen(pTHX_ register SV *sv) |
| 740 | { |
| 741 | STRLEN n_a; |
| 742 | return sv_2pv(sv, &n_a); |
| 743 | } |
| 744 | #endif |
| 745 | |
| 0a7c7f4f |
746 | #endif /* _P_P_PORTABILITY_H_ */ |
| 44284200 |
747 | |
| 748 | /* End of File ppport.h */ |
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