3 * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4 * 2006, 2007, 2008 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
13 /* These variables are per-interpreter in threaded/multiplicity builds,
16 * Don't forget to re-run regen/embed.pl to propagate changes! */
18 /* New variables must be added to the very end for binary compatibility. */
20 /* DON'T FORGET to add your variable also to perl_clone()! (in sv.c) */
22 /* The 'I' prefix is only needed for vars that need appropriate #defines
23 * generated when built with or without MULTIPLICITY. It is also used
24 * to generate the appropriate export list for win32. If the variable
25 * needs to be initialized, use PERLVARI.
27 * When building without MULTIPLICITY, these variables will be truly global.
29 * Important ones in the first cache line (if alignment is done right) */
31 PERLVAR(I, stack_sp, SV **) /* top of the stack */
32 PERLVAR(I, op, OP *) /* currently executing op */
33 PERLVAR(I, curpad, SV **) /* active pad (lexicals+tmps) */
35 PERLVAR(I, stack_base, SV **)
36 PERLVAR(I, stack_max, SV **)
38 PERLVAR(I, savestack, ANY *) /* items that need to be restored when
39 LEAVEing scopes we've ENTERed */
40 PERLVAR(I, savestack_ix, I32)
41 PERLVAR(I, savestack_max, I32)
43 PERLVAR(I, scopestack, I32 *) /* scopes we've ENTERed */
44 PERLVAR(I, scopestack_ix, I32)
45 PERLVAR(I, scopestack_max, I32)
47 PERLVAR(I, tmps_stack, SV **) /* mortals we've made */
48 PERLVARI(I, tmps_ix, SSize_t, -1)
49 PERLVARI(I, tmps_floor, SSize_t, -1)
50 PERLVAR(I, tmps_max, SSize_t) /* first unalloced slot in tmps stack */
52 PERLVAR(I, markstack, I32 *) /* stack_sp locations we're
54 PERLVAR(I, markstack_ptr, I32 *)
55 PERLVAR(I, markstack_max, I32 *)
57 PERLVARI(I, sub_generation, U32, 1) /* incr to invalidate method cache */
59 #ifdef PERL_HASH_RANDOMIZE_KEYS
60 #ifdef USE_PERL_PERTURB_KEYS
61 PERLVARI(I, hash_rand_bits_enabled, U8, 1) /* used to randomize hash stuff 0 == no-random, 1 == random, 2 == determinsitic */
63 PERLVARI(I, hash_rand_bits, UV, 0) /* used to randomize hash stuff */
65 PERLVAR(I, strtab, HV *) /* shared string table */
66 /* prog counter for the currently executing OP_MULTIDEREF Used to signal
67 * to S_find_uninit_var() where we are */
68 PERLVAR(I, multideref_pc, UNOP_AUX_item *)
70 /* Fields used by magic variables such as $@, $/ and so on */
71 PERLVAR(I, curpm, PMOP *) /* what to do \ interps in REs from */
72 PERLVAR(I, curpm_under, PMOP *) /* what to do \ interps in REs from */
74 PERLVAR(I, tainting, bool) /* ? doing taint checks */
75 PERLVARI(I, tainted, bool, FALSE) /* using variables controlled by $< */
77 /* PL_delaymagic is currently used for two purposes: to assure simultaneous
78 * updates in ($<,$>) = ..., and to assure atomic update in push/unshift
79 * @ISA, It works like this: a few places such as pp_push set the DM_DELAY
80 * flag; then various places such as av_store() skip mg_set(ary) if this
81 * flag is set, and various magic vtable methods set flags like
82 * DM_ARRAY_ISA if they've seen something of that ilk. Finally when
83 * control returns to pp_push or whatever, it sees if any of those flags
84 * have been set, and if so finally calls mg_set().
86 * NB: PL_delaymagic is automatically saved and restored by JUMPENV_PUSH
87 * / POP. This removes the need to do ENTER/SAVEI16(PL_delaymagic)/LEAVE
88 * in hot code like pp_push.
90 PERLVAR(I, delaymagic, U16) /* ($<,$>) = ... */
93 =for apidoc_section $warning
94 =for apidoc mn|U8|PL_dowarn
96 The C variable that roughly corresponds to Perl's C<$^W> warning variable.
97 However, C<$^W> is treated as a boolean, whereas C<PL_dowarn> is a
98 collection of flag bits.
100 On threaded perls, each thread has an independent copy of this variable;
101 each initialized at creation time with the current value of the creating
107 PERLVAR(I, dowarn, U8)
109 #if defined (PERL_UTF8_CACHE_ASSERT) || defined (DEBUGGING)
114 PERLVARI(I, utf8cache, I8, PERL___I) /* Is the utf8 caching code enabled? */
118 =for apidoc Amn|GV *|PL_defgv
120 The GV representing C<*_>. Useful for access to C<$_>.
122 On threaded perls, each thread has an independent copy of this variable;
123 each initialized at creation time with the current value of the creating
129 PERLVAR(I, localizing, U8) /* are we processing a local() list? */
130 PERLVAR(I, in_eval, U8) /* trap "fatal" errors? */
131 PERLVAR(I, defgv, GV *) /* the *_ glob */
134 =for apidoc Amn|HV*|PL_curstash
136 The stash for the package code will be compiled into.
138 On threaded perls, each thread has an independent copy of this variable;
139 each initialized at creation time with the current value of the creating
146 PERLVAR(I, defstash, HV *) /* main symbol table */
147 PERLVAR(I, curstash, HV *) /* symbol table for current package */
150 =for apidoc Amn|COP*|PL_curcop
152 The currently active COP (control op) roughly representing the current
153 statement in the source.
155 On threaded perls, each thread has an independent copy of this variable;
156 each initialized at creation time with the current value of the creating
162 PERLVAR(I, curcop, COP *)
163 PERLVAR(I, curstack, AV *) /* THE STACK */
164 PERLVAR(I, curstackinfo, PERL_SI *) /* current stack + context */
165 PERLVAR(I, mainstack, AV *) /* the stack when nothing funny is
168 /* memory management */
169 PERLVAR(I, sv_count, IV) /* how many SV* are currently allocated */
171 PERLVAR(I, sv_root, SV *) /* storage for SVs belonging to interp */
172 PERLVAR(I, sv_arenaroot, SV *) /* list of areas for garbage collection */
174 /* fake PMOP that PL_curpm points to while in (?{}) so $1 et al are visible */
175 PERLVARI(I, reg_curpm, PMOP*, NULL)
177 /* the currently active slab in a chain of slabs of regmatch states,
178 * and the currently active state within that slab. This stack of states
179 * is shared amongst re-entrant calls to the regex engine */
181 PERLVARI(I, regmatch_slab, regmatch_slab *, NULL)
182 PERLVAR(I, regmatch_state, regmatch_state *)
184 PERLVAR(I, comppad, PAD *) /* storage for lexically scoped temporaries */
187 =for apidoc_section $SV
188 =for apidoc Amn|SV|PL_sv_undef
189 This is the C<undef> SV. It is readonly. Always refer to this as
192 =for apidoc Amn|SV|PL_sv_no
193 This is the C<false> SV. It is readonly. See C<L</PL_sv_yes>>. Always refer
194 to this as C<&PL_sv_no>.
196 =for apidoc Amn|SV|PL_sv_yes
197 This is the C<true> SV. It is readonly. See C<L</PL_sv_no>>. Always refer to
198 this as C<&PL_sv_yes>.
200 =for apidoc Amn|SV|PL_sv_zero
201 This readonly SV has a zero numeric value and a C<"0"> string value. It's
202 similar to C<L</PL_sv_no>> except for its string value. Can be used as a
203 cheap alternative to C<mXPUSHi(0)> for example. Always refer to this as
204 C<&PL_sv_zero>. Introduced in 5.28.
210 PERLVAR(I, sv_yes, SV)
211 PERLVAR(I, sv_undef, SV)
212 PERLVAR(I, sv_no, SV)
213 PERLVAR(I, sv_zero, SV)
215 /* store the immortals as an array to ensure they are contiguous in
216 * memory: makes SvIMMORTAL_INTERP(sv) possible */
217 PERLVARA(I, sv_immortals, 4, SV)
220 PERLVAR(I, padname_undef, PADNAME)
221 PERLVAR(I, padname_const, PADNAME)
224 =for apidoc Cmn||PL_Sv
226 A scratch pad SV for whatever temporary use you need. Chiefly used as a
227 fallback by macros on platforms where L<perlapi/PERL_USE_GCC_BRACE_GROUPS>> is
228 unavailable, and which would otherwise would evaluate their SV parameter more
235 PERLVAR(I, parser, yy_parser *) /* current parser state */
237 PERLVAR(I, stashcache, HV *) /* Cache to speed up S_method_common */
241 =for apidoc Amn|STRLEN|PL_na
243 A convenience variable which is typically used with C<SvPV> when one
244 doesn't care about the length of the string. It is usually more efficient
245 to either declare a local variable and use that instead or to use the
251 PERLVAR(I, na, STRLEN) /* for use in SvPV when length is
255 PERLVAR(I, statcache, Stat_t) /* _ */
256 PERLVAR(I, statgv, GV *)
257 PERLVARI(I, statname, SV *, NULL)
260 =for apidoc_section $io
261 =for apidoc mn|SV*|PL_rs
263 The input record separator - C<$/> in Perl space.
265 On threaded perls, each thread has an independent copy of this variable;
266 each initialized at creation time with the current value of the creating
269 =for apidoc mn|GV*|PL_last_in_gv
271 The GV which was last used for a filehandle input operation. (C<< <FH> >>)
273 On threaded perls, each thread has an independent copy of this variable;
274 each initialized at creation time with the current value of the creating
277 =for apidoc mn|GV*|PL_ofsgv
279 The glob containing the output field separator - C<*,> in Perl space.
281 On threaded perls, each thread has an independent copy of this variable;
282 each initialized at creation time with the current value of the creating
288 PERLVAR(I, rs, SV *) /* input record separator $/ */
289 PERLVAR(I, last_in_gv, GV *) /* GV used in last <FH> */
290 PERLVAR(I, ofsgv, GV *) /* GV of output field separator *, */
291 PERLVAR(I, defoutgv, GV *) /* default FH for output */
292 PERLVARI(I, chopset, const char *, " \n-") /* $: */
293 PERLVAR(I, formtarget, SV *)
294 PERLVAR(I, bodytarget, SV *)
295 PERLVAR(I, toptarget, SV *)
298 PERLVAR(I, restartop, OP *) /* propagating an error from croak? */
299 PERLVAR(I, restartjmpenv, JMPENV *) /* target frame for longjmp in die */
301 PERLVAR(I, top_env, JMPENV *) /* ptr to current sigjmp environment */
302 PERLVAR(I, start_env, JMPENV) /* empty startup sigjmp environment */
303 PERLVARI(I, errors, SV *, NULL) /* outstanding queued errors */
305 /* statics "owned" by various functions */
306 PERLVAR(I, hv_fetch_ent_mh, HE*) /* owned by hv_fetch_ent() */
308 PERLVAR(I, lastgotoprobe, OP*) /* from pp_ctl.c */
311 PERLVAR(I, sortcop, OP *) /* user defined sort routine */
312 PERLVAR(I, sortstash, HV *) /* which is in some package or other */
313 PERLVAR(I, firstgv, GV *) /* $a */
314 PERLVAR(I, secondgv, GV *) /* $b */
317 PERLVAR(I, efloatbuf, char *)
318 PERLVAR(I, efloatsize, STRLEN)
320 PERLVARI(I, dumpindent, U16, 4) /* number of blanks per dump
324 =for apidoc_section $embedding
325 =for apidoc Amn|U8|PL_exit_flags
327 Contains flags controlling perl's behaviour on exit():
331 =item * C<PERL_EXIT_DESTRUCT_END>
333 If set, END blocks are executed when the interpreter is destroyed.
334 This is normally set by perl itself after the interpreter is
337 =item * C<PERL_EXIT_ABORT>
339 Call C<abort()> on exit. This is used internally by perl itself to
340 abort if exit is called while processing exit.
342 =item * C<PERL_EXIT_WARN>
346 =item * C<PERL_EXIT_EXPECTED>
348 Set by the L<perlfunc/exit> operator.
352 =for apidoc Amnh||PERL_EXIT_EXPECTED
353 =for apidoc Amnh||PERL_EXIT_ABORT
354 =for apidoc Amnh||PERL_EXIT_DESTRUCT_END
355 =for apidoc Amnh||PERL_EXIT_WARN
357 On threaded perls, each thread has an independent copy of this variable;
358 each initialized at creation time with the current value of the creating
364 PERLVAR(I, exit_flags, U8) /* was exit() unexpected, etc. */
366 PERLVAR(I, utf8locale, bool) /* utf8 locale detected */
367 PERLVAR(I, in_utf8_CTYPE_locale, bool)
368 PERLVAR(I, in_utf8_COLLATE_locale, bool)
369 PERLVAR(I, in_utf8_turkic_locale, bool)
370 #if defined(USE_ITHREADS) && ! defined(USE_THREAD_SAFE_LOCALE)
371 PERLVARI(I, lc_numeric_mutex_depth, int, 0) /* Emulate general semaphore */
373 PERLVARA(I, locale_utf8ness, 256, char)
375 #ifdef USE_LOCALE_CTYPE
376 PERLVAR(I, warn_locale, SV *)
379 PERLVARA(I, colors,6, char *) /* values from PERL_RE_COLORS env var */
382 =for apidoc_section $optree_construction
383 =for apidoc Amn|peep_t|PL_peepp
385 Pointer to the per-subroutine peephole optimiser. This is a function
386 that gets called at the end of compilation of a Perl subroutine (or
387 equivalently independent piece of Perl code) to perform fixups of
388 some ops and to perform small-scale optimisations. The function is
389 called once for each subroutine that is compiled, and is passed, as sole
390 parameter, a pointer to the op that is the entry point to the subroutine.
391 It modifies the op tree in place.
393 The peephole optimiser should never be completely replaced. Rather,
394 add code to it by wrapping the existing optimiser. The basic way to do
395 this can be seen in L<perlguts/Compile pass 3: peephole optimization>.
396 If the new code wishes to operate on ops throughout the subroutine's
397 structure, rather than just at the top level, it is likely to be more
398 convenient to wrap the L</PL_rpeepp> hook.
400 On threaded perls, each thread has an independent copy of this variable;
401 each initialized at creation time with the current value of the creating
407 PERLVARI(I, peepp, peep_t, Perl_peep)
410 =for apidoc Amn|peep_t|PL_rpeepp
412 Pointer to the recursive peephole optimiser. This is a function
413 that gets called at the end of compilation of a Perl subroutine (or
414 equivalently independent piece of Perl code) to perform fixups of some
415 ops and to perform small-scale optimisations. The function is called
416 once for each chain of ops linked through their C<op_next> fields;
417 it is recursively called to handle each side chain. It is passed, as
418 sole parameter, a pointer to the op that is at the head of the chain.
419 It modifies the op tree in place.
421 The peephole optimiser should never be completely replaced. Rather,
422 add code to it by wrapping the existing optimiser. The basic way to do
423 this can be seen in L<perlguts/Compile pass 3: peephole optimization>.
424 If the new code wishes to operate only on ops at a subroutine's top level,
425 rather than throughout the structure, it is likely to be more convenient
426 to wrap the L</PL_peepp> hook.
428 On threaded perls, each thread has an independent copy of this variable;
429 each initialized at creation time with the current value of the creating
435 PERLVARI(I, rpeepp, peep_t, Perl_rpeep)
438 =for apidoc Amn|Perl_ophook_t|PL_opfreehook
440 When non-C<NULL>, the function pointed by this variable will be called each time an OP is freed with the corresponding OP as the argument.
441 This allows extensions to free any extra attribute they have locally attached to an OP.
442 It is also assured to first fire for the parent OP and then for its kids.
444 When you replace this variable, it is considered a good practice to store the possibly previously installed hook and that you recall it inside your own.
446 On threaded perls, each thread has an independent copy of this variable;
447 each initialized at creation time with the current value of the creating
453 PERLVARI(I, opfreehook, Perl_ophook_t, 0) /* op_free() hook */
455 PERLVARI(I, watchaddr, char **, 0)
456 PERLVAR(I, watchok, char *)
458 PERLVAR(I, perldb, U32)
460 PERLVAR(I, signals, U32) /* Using which pre-5.8 signals */
462 PERLVAR(I, reentrant_retint, int) /* Integer return value from reentrant functions */
464 /* pseudo environmental stuff */
465 PERLVAR(I, origargc, int)
466 PERLVAR(I, origargv, char **)
467 PERLVAR(I, envgv, GV *)
468 PERLVAR(I, incgv, GV *)
469 PERLVAR(I, hintgv, GV *)
470 PERLVAR(I, origfilename, char *)
471 PERLVARI(I, xsubfilename, const char *, NULL)
472 PERLVAR(I, diehook, SV *)
473 PERLVAR(I, warnhook, SV *)
476 PERLVAR(I, patchlevel, SV *)
477 PERLVAR(I, localpatches, const char * const *)
478 PERLVARI(I, splitstr, const char *, " ")
480 PERLVAR(I, minus_c, bool)
481 PERLVAR(I, minus_n, bool)
482 PERLVAR(I, minus_p, bool)
483 PERLVAR(I, minus_l, bool)
484 PERLVAR(I, minus_a, bool)
485 PERLVAR(I, minus_F, bool)
486 PERLVAR(I, doswitches, bool)
487 PERLVAR(I, minus_E, bool)
489 PERLVAR(I, inplace, char *)
490 PERLVAR(I, e_script, SV *)
492 PERLVAR(I, basetime, Time_t) /* $^T */
494 PERLVARI(I, maxsysfd, I32, MAXSYSFD)
495 /* top fd to pass to subprocesses */
496 PERLVAR(I, statusvalue, I32) /* $? */
498 PERLVAR(I, statusvalue_vms, U32)
500 PERLVAR(I, statusvalue_posix, I32)
503 PERLVARI(I, sig_pending, int, 0) /* Number if highest signal pending */
504 PERLVAR(I, psig_pend, int *) /* per-signal "count" of pending */
506 /* shortcuts to various I/O objects */
507 PERLVAR(I, stdingv, GV *) /* *STDIN */
508 PERLVAR(I, stderrgv, GV *) /* *STDERR */
509 PERLVAR(I, argvgv, GV *) /* *ARGV */
510 PERLVAR(I, argvoutgv, GV *) /* *ARGVOUT */
511 PERLVAR(I, argvout_stack, AV *)
513 /* shortcuts to regexp stuff */
514 PERLVAR(I, replgv, GV *) /* *^R */
516 /* shortcuts to misc objects */
517 PERLVAR(I, errgv, GV *) /* *@ */
519 /* shortcuts to debugging objects */
520 PERLVAR(I, DBgv, GV *) /* *DB::DB */
521 PERLVAR(I, DBline, GV *) /* *DB::line */
524 =for apidoc_section $debugging
525 =for apidoc mn|GV *|PL_DBsub
526 When Perl is run in debugging mode, with the B<-d> switch, this GV contains
527 the SV which holds the name of the sub being debugged. This is the C
528 variable which corresponds to Perl's $DB::sub variable. See
531 On threaded perls, each thread has an independent copy of this variable;
532 each initialized at creation time with the current value of the creating
535 =for apidoc mn|SV *|PL_DBsingle
536 When Perl is run in debugging mode, with the B<-d> switch, this SV is a
537 boolean which indicates whether subs are being single-stepped.
538 Single-stepping is automatically turned on after every step. This is the C
539 variable which corresponds to Perl's $DB::single variable. See
542 On threaded perls, each thread has an independent copy of this variable;
543 each initialized at creation time with the current value of the creating
546 =for apidoc mn|SV *|PL_DBtrace
547 Trace variable used when Perl is run in debugging mode, with the B<-d>
548 switch. This is the C variable which corresponds to Perl's $DB::trace
549 variable. See C<L</PL_DBsingle>>.
551 On threaded perls, each thread has an independent copy of this variable;
552 each initialized at creation time with the current value of the creating
558 PERLVAR(I, DBsub, GV *) /* *DB::sub */
559 PERLVAR(I, DBsingle, SV *) /* $DB::single */
560 PERLVAR(I, DBtrace, SV *) /* $DB::trace */
561 PERLVAR(I, DBsignal, SV *) /* $DB::signal */
562 PERLVAR(I, dbargs, AV *) /* args to call listed by caller function */
564 PERLVARA(I, DBcontrol, DBVARMG_COUNT, IV) /* IV versions of $DB::single, trace, signal */
567 PERLVAR(I, debstash, HV *) /* symbol table for perldb package */
568 PERLVAR(I, globalstash, HV *) /* global keyword overrides imported here */
569 PERLVAR(I, curstname, SV *) /* name of current package */
570 PERLVAR(I, beginav, AV *) /* names of BEGIN subroutines */
571 PERLVAR(I, endav, AV *) /* names of END subroutines */
572 PERLVAR(I, unitcheckav, AV *) /* names of UNITCHECK subroutines */
573 PERLVAR(I, checkav, AV *) /* names of CHECK subroutines */
574 PERLVAR(I, initav, AV *) /* names of INIT subroutines */
576 /* subprocess state */
577 PERLVAR(I, fdpid, AV *) /* keep fd-to-pid mappings for my_popen */
580 PERLVARI(I, op_mask, char *, NULL) /* masked operations for safe evals */
582 /* current interpreter roots */
583 PERLVAR(I, main_cv, CV *)
584 PERLVAR(I, main_root, OP *)
585 PERLVAR(I, main_start, OP *)
586 PERLVAR(I, eval_root, OP *)
587 PERLVAR(I, eval_start, OP *)
589 /* runtime control stuff */
590 PERLVARI(I, curcopdb, COP *, NULL)
592 PERLVAR(I, filemode, int) /* so nextargv() can preserve mode */
593 PERLVAR(I, lastfd, int) /* what to preserve mode on */
594 PERLVAR(I, oldname, char *) /* what to preserve mode on */
595 /* Elements in this array have ';' appended and are injected as a single line
596 into the tokeniser. You can't put any (literal) newlines into any program
597 you stuff in into this array, as the point where it's injected is expecting
598 a single physical line. */
599 PERLVAR(I, preambleav, AV *)
600 PERLVAR(I, mess_sv, SV *)
601 PERLVAR(I, ors_sv, SV *) /* output record separator $\ */
603 /* funky return mechanisms */
604 PERLVAR(I, forkprocess, int) /* so do_open |- can return proc# */
606 /* statics moved here for shared library purposes */
607 PERLVARI(I, gensym, I32, 0) /* next symbol for getsym() to define */
608 PERLVARI(I, cv_has_eval, bool, FALSE) /* PL_compcv includes an entereval or similar */
609 PERLVAR(I, taint_warn, bool) /* taint warns instead of dying */
610 PERLVARI(I, laststype, U16, OP_STAT)
612 PERLVARI(I, laststatval, int, -1)
614 PERLVAR(I, modcount, I32) /* how much op_lvalue()ification in
617 /* interpreter atexit processing */
618 PERLVARI(I, exitlistlen, I32, 0) /* length of same */
619 PERLVARI(I, exitlist, PerlExitListEntry *, NULL)
620 /* list of exit functions */
623 =for apidoc_section $HV
624 =for apidoc Amn|HV*|PL_modglobal
626 C<PL_modglobal> is a general purpose, interpreter global HV for use by
627 extensions that need to keep information on a per-interpreter basis.
628 In a pinch, it can also be used as a symbol table for extensions
629 to share data among each other. It is a good idea to use keys
630 prefixed by the package name of the extension that owns the data.
632 On threaded perls, each thread has an independent copy of this variable;
633 each initialized at creation time with the current value of the creating
639 PERLVAR(I, modglobal, HV *) /* per-interp module data */
641 /* these used to be in global before 5.004_68 */
642 PERLVARI(I, profiledata, U32 *, NULL) /* table of ops, counts */
644 PERLVAR(I, compiling, COP) /* compiling/done executing marker */
646 PERLVAR(I, compcv, CV *) /* currently compiling subroutine */
647 PERLVAR(I, comppad_name, PADNAMELIST *) /* variable names for "my" variables */
648 PERLVAR(I, comppad_name_fill, PADOFFSET)/* last "introduced" variable offset */
649 PERLVAR(I, comppad_name_floor, PADOFFSET)/* start of vars in innermost block */
651 #ifdef HAVE_INTERP_INTERN
652 PERLVAR(I, sys_intern, struct interp_intern)
653 /* platform internals */
656 /* more statics moved here */
657 PERLVAR(I, DBcv, CV *) /* from perl.c */
658 PERLVARI(I, generation, int, 100) /* scan sequence# for OP_AASSIGN
659 compile-time common elem detection */
661 PERLVAR(I, unicode, U32) /* Unicode features: $ENV{PERL_UNICODE} or -C */
663 PERLVARI(I, in_clean_objs,bool, FALSE) /* from sv.c */
664 PERLVARI(I, in_clean_all, bool, FALSE) /* ptrs to freed SVs now legal */
665 PERLVAR(I, nomemok, bool) /* let malloc context handle nomem */
666 PERLVARI(I, savebegin, bool, FALSE) /* save BEGINs for compiler */
669 PERLVAR(I, delaymagic_uid, Uid_t) /* current real user id, only for delaymagic */
670 PERLVAR(I, delaymagic_euid, Uid_t) /* current effective user id, only for delaymagic */
671 PERLVAR(I, delaymagic_gid, Gid_t) /* current real group id, only for delaymagic */
672 PERLVAR(I, delaymagic_egid, Gid_t) /* current effective group id, only for delaymagic */
673 PERLVARI(I, an, U32, 0) /* malloc sequence number */
675 /* Perl_Ibreakable_sub_generation_ptr was too long for VMS, hence "gen" */
676 PERLVARI(I, breakable_sub_gen, U32, 0)
679 /* exercise wrap-around */
680 #define PERL_COP_SEQMAX (U32_MAX-50)
682 #define PERL_COP_SEQMAX 0
684 PERLVARI(I, cop_seqmax, U32, PERL_COP_SEQMAX) /* statement sequence number */
685 #undef PERL_COP_SEQMAX
687 PERLVARI(I, evalseq, U32, 0) /* eval sequence number */
688 PERLVAR(I, origalen, U32)
689 PERLVAR(I, origenviron, char **)
690 #ifdef PERL_USES_PL_PIDSTATUS
691 PERLVAR(I, pidstatus, HV *) /* pid-to-status mappings for waitpid */
693 PERLVAR(I, osname, char *) /* operating system */
695 PERLVAR(I, sighandlerp, Sighandler_t)
696 /* these two are provided only to solve library linkage issues; they
697 * should not be hooked by user code */
698 PERLVAR(I, sighandler1p, Sighandler1_t)
699 PERLVAR(I, sighandler3p, Sighandler3_t)
701 PERLVARA(I, body_roots, PERL_ARENA_ROOTS_SIZE, void*) /* array of body roots */
703 PERLVAR(I, debug, volatile U32) /* flags given to -D switch */
705 PERLVARI(I, padlist_generation, U32, 1) /* id to identify padlist clones */
707 PERLVARI(I, runops, runops_proc_t, RUNOPS_DEFAULT)
709 PERLVAR(I, subname, SV *) /* name of current subroutine */
711 PERLVAR(I, subline, I32) /* line this subroutine began on */
712 PERLVAR(I, min_intro_pending, PADOFFSET)/* start of vars to introduce */
714 PERLVAR(I, max_intro_pending, PADOFFSET)/* end of vars to introduce */
715 PERLVAR(I, padix, PADOFFSET) /* lowest unused index - 1
716 in current "register" pad */
717 PERLVAR(I, constpadix, PADOFFSET) /* lowest unused for constants */
719 PERLVAR(I, padix_floor, PADOFFSET) /* how low may inner block reset padix */
721 #if defined(USE_POSIX_2008_LOCALE) \
722 && defined(USE_THREAD_SAFE_LOCALE) \
723 && ! defined(HAS_QUERYLOCALE)
725 PERLVARA(I, curlocales, 12, char *)
728 #ifdef USE_LOCALE_COLLATE
730 PERLVAR(I, collation_name, char *) /* Name of current collation */
731 PERLVAR(I, collxfrm_base, Size_t) /* Basic overhead in *xfrm() */
732 PERLVARI(I, collxfrm_mult,Size_t, 2) /* Expansion factor in *xfrm() */
733 PERLVARI(I, collation_ix, U32, 0) /* Collation generation index */
734 PERLVARI(I, strxfrm_NUL_replacement, U8, 0) /* Code point to replace NULs */
735 PERLVARI(I, strxfrm_is_behaved, bool, TRUE)
736 /* Assume until proven otherwise that it works */
737 PERLVARI(I, strxfrm_max_cp, U8, 0) /* Highest collating cp in locale */
738 PERLVARI(I, collation_standard, bool, TRUE)
739 /* Assume simple collation */
740 #endif /* USE_LOCALE_COLLATE */
742 PERLVARI(I, langinfo_buf, char *, NULL)
743 PERLVARI(I, langinfo_bufsize, Size_t, 0)
744 PERLVARI(I, setlocale_buf, char *, NULL)
745 PERLVARI(I, setlocale_bufsize, Size_t, 0)
747 #ifdef PERL_SAWAMPERSAND
748 PERLVAR(I, sawampersand, U8) /* must save all match strings */
751 /* current phase the interpreter is in
752 for ordering this structure to remove holes, we're assuming that this is 4
754 PERLVARI(I, phase, enum perl_phase, PERL_PHASE_CONSTRUCT)
756 PERLVARI(I, in_load_module, bool, FALSE) /* to prevent recursions in PerlIO_find_layer */
758 PERLVAR(I, unsafe, bool)
759 PERLVAR(I, colorset, bool) /* PERL_RE_COLORS env var is in use */
762 =for apidoc_section $embedding
763 =for apidoc Amn|signed char|PL_perl_destruct_level
765 This value may be set when embedding for full cleanup.
775 =item * 2 or greater - full with checks.
779 If C<$ENV{PERL_DESTRUCT_LEVEL}> is set to an integer greater than the
780 value of C<PL_perl_destruct_level> its value is used instead.
782 On threaded perls, each thread has an independent copy of this variable;
783 each initialized at creation time with the current value of the creating
788 /* mod_perl is special, and also assigns a meaning -1 */
789 PERLVARI(I, perl_destruct_level, signed char, 0)
791 PERLVAR(I, pad_reset_pending, bool) /* reset pad on next attempted alloc */
793 PERLVAR(I, srand_called, bool)
795 #ifdef USE_LOCALE_NUMERIC
797 PERLVARI(I, numeric_underlying, bool, TRUE)
798 /* Assume underlying locale numerics */
799 PERLVARI(I, numeric_underlying_is_standard, bool, TRUE)
801 PERLVARI(I, numeric_standard, int, TRUE)
802 /* Assume C locale numerics */
803 PERLVAR(I, numeric_name, char *) /* Name of current numeric locale */
804 PERLVAR(I, numeric_radix_sv, SV *) /* The radix separator if not '.' */
806 # ifdef HAS_POSIX_2008_LOCALE
808 PERLVARI(I, underlying_numeric_obj, locale_t, NULL)
811 #endif /* !USE_LOCALE_NUMERIC */
813 /* Array of signal handlers, indexed by signal number, through which the C
814 signal handler dispatches. */
815 PERLVAR(I, psig_ptr, SV **)
816 /* Array of names of signals, indexed by signal number, for (re)use as the first
817 argument to a signal handler. Only one block of memory is allocated for
818 both psig_name and psig_ptr. */
819 PERLVAR(I, psig_name, SV **)
821 #if defined(PERL_IMPLICIT_SYS)
822 PERLVAR(I, Mem, struct IPerlMem *)
823 PERLVAR(I, MemShared, struct IPerlMem *)
824 PERLVAR(I, MemParse, struct IPerlMem *)
825 PERLVAR(I, Env, struct IPerlEnv *)
826 PERLVAR(I, StdIO, struct IPerlStdIO *)
827 PERLVAR(I, LIO, struct IPerlLIO *)
828 PERLVAR(I, Dir, struct IPerlDir *)
829 PERLVAR(I, Sock, struct IPerlSock *)
830 PERLVAR(I, Proc, struct IPerlProc *)
833 PERLVAR(I, ptr_table, PTR_TBL_t *)
834 PERLVARI(I, beginav_save, AV *, NULL) /* save BEGIN{}s when compiling */
836 PERLVAR(I, body_arenas, void *) /* pointer to list of body-arenas */
839 #if defined(USE_ITHREADS)
840 PERLVAR(I, regex_pad, SV **) /* Shortcut into the array of
842 PERLVAR(I, regex_padav, AV *) /* All regex objects, indexed via the
843 values in op_pmoffset of pmop.
844 Entry 0 is an SV whose PV is a
845 "packed" list of IVs listing
846 the now-free slots in the array */
847 PERLVAR(I, stashpad, HV **) /* for CopSTASH */
848 PERLVARI(I, stashpadmax, PADOFFSET, 64)
849 PERLVARI(I, stashpadix, PADOFFSET, 0)
852 #ifdef USE_REENTRANT_API
853 PERLVAR(I, reentrant_buffer, REENTR *) /* here we store the _r buffers */
856 PERLVAR(I, custom_op_names, HV *) /* Names of user defined ops */
857 PERLVAR(I, custom_op_descs, HV *) /* Descriptions of user defined ops */
860 PERLVARI(I, perlio, PerlIOl *, NULL)
861 PERLVARI(I, known_layers, PerlIO_list_t *, NULL)
862 PERLVARI(I, def_layerlist, PerlIO_list_t *, NULL)
865 PERLVARI(I, checkav_save, AV *, NULL) /* save CHECK{}s when compiling */
866 PERLVARI(I, unitcheckav_save, AV *, NULL)
867 /* save UNITCHECK{}s when compiling */
869 PERLVARI(I, clocktick, long, 0) /* this many times() ticks in a second */
871 /* Hooks to shared SVs and locks. */
872 PERLVARI(I, sharehook, share_proc_t, Perl_sv_nosharing)
873 PERLVARI(I, lockhook, share_proc_t, Perl_sv_nosharing)
875 GCC_DIAG_IGNORE(-Wdeprecated-declarations)
877 # define PERL_UNLOCK_HOOK Perl_sv_nosharing
879 /* This reference ensures that the mathoms are linked with perl */
880 # define PERL_UNLOCK_HOOK Perl_sv_nounlocking
882 PERLVARI(I, unlockhook, share_proc_t, PERL_UNLOCK_HOOK)
886 PERLVARI(I, threadhook, thrhook_proc_t, Perl_nothreadhook)
888 /* Can shared object be destroyed */
889 PERLVARI(I, destroyhook, destroyable_proc_t, Perl_sv_destroyable)
892 PERLVARI(I, signalhook, despatch_signals_proc_t, Perl_despatch_signals)
895 PERLVARI(I, isarev, HV *, NULL) /* Reverse map of @ISA dependencies */
897 /* Register of known Method Resolution Orders.
898 What this actually points to is an implementation detail (it may change to
899 a structure incorporating a reference count - use mro_get_from_name to
900 retrieve a C<struct mro_alg *> */
901 PERLVAR(I, registered_mros, HV *)
903 /* Compile-time block start/end hooks */
904 PERLVAR(I, blockhooks, AV *)
906 PERLVAR(I, custom_ops, HV *) /* custom op registrations */
908 PERLVAR(I, Xpv, XPV *) /* (unused) held temporary value */
910 /* name of the scopes we've ENTERed. Only used with -DDEBUGGING, but needs to be
911 present always, as -DDEBUGGING must be binary compatible with non. */
912 PERLVARI(I, scopestack_name, const char * *, NULL)
914 PERLVAR(I, debug_pad, struct perl_debug_pad) /* always needed because of the re extension */
916 /* Hook for File::Glob */
917 PERLVARI(I, globhook, globhook_t, NULL)
919 #if defined(MULTIPLICITY)
920 /* The last unconditional member of the interpreter structure when 5.18.0 was
921 released. The offset of the end of this is baked into a global variable in
922 any shared perl library which will allow a sanity test in future perl
924 # define PERL_LAST_5_18_0_INTERP_MEMBER Iglobhook
927 #ifdef PERL_IMPLICIT_CONTEXT
928 PERLVARI(I, my_cxt_list, void **, NULL) /* per-module array of MY_CXT pointers */
929 PERLVARI(I, my_cxt_size, int, 0) /* size of PL_my_cxt_list */
932 #if defined(PERL_IMPLICIT_CONTEXT) || defined(PERL_DEBUG_READONLY_COW)
933 /* For use with the memory debugging code in util.c. This is used only in
934 * DEBUGGING builds (as long as the relevant structure is defined), but
935 * defining it in non-debug builds too means that we retain binary
936 * compatibility between otherwise-compatible plain and debug builds. */
937 PERLVAR(I, memory_debug_header, struct perl_memory_debug_header)
940 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
941 /* File descriptor to talk to the child which dumps scalars. */
942 PERLVARI(I, dumper_fd, int, -1)
946 #ifdef DEBUG_LEAKING_SCALARS
947 PERLVARI(I, sv_serial, U32, 0) /* SV serial number, used in sv.c */
950 PERLVARA(I, sv_consts, SV_CONSTS_COUNT, SV*) /* constant SVs with precomputed hash value */
952 #ifdef PERL_TRACE_OPS
953 PERLVARA(I, op_exec_cnt, OP_max+2, UV) /* Counts of executed OPs of the given type.
954 If PERL_TRACE_OPS is enabled, we'll dump
955 a summary count of all ops executed in the
956 program at perl_destruct time. For
957 profiling/debugging only. Works only if
958 DEBUGGING is enabled, too. */
961 PERLVAR(I, random_state, PL_RANDOM_STATE_TYPE)
963 PERLVARI(I, dump_re_max_len, STRLEN, 60)
965 /* For internal uses of randomness, this ensures the sequence of
966 * random numbers returned by rand() isn't modified by perl's internal
968 * This is important if the user has called srand() with a seed.
971 PERLVAR(I, internal_random_state, PL_RANDOM_STATE_TYPE)
973 PERLVARA(I, TR_SPECIAL_HANDLING_UTF8, UTF8_MAXBYTES, char)
975 PERLVAR(I, AboveLatin1, SV *)
976 PERLVAR(I, Assigned_invlist, SV *)
977 PERLVAR(I, GCB_invlist, SV *)
978 PERLVAR(I, HasMultiCharFold, SV *)
979 PERLVAR(I, InMultiCharFold, SV *)
980 PERLVAR(I, Latin1, SV *)
981 PERLVAR(I, LB_invlist, SV *)
982 PERLVAR(I, SB_invlist, SV *)
983 PERLVAR(I, SCX_invlist, SV *)
984 PERLVAR(I, UpperLatin1, SV *) /* Code points 128 - 255 */
986 /* List of characters that participate in any fold defined by Unicode */
987 PERLVAR(I, in_some_fold, SV *)
989 /* Everything that folds to a given character, for case insensitivity regex
991 PERLVAR(I, utf8_foldclosures, SV *)
993 PERLVAR(I, utf8_idcont, SV *)
994 PERLVAR(I, utf8_idstart, SV *)
995 PERLVAR(I, utf8_perl_idcont, SV *)
996 PERLVAR(I, utf8_perl_idstart, SV *)
997 PERLVAR(I, utf8_xidcont, SV *)
998 PERLVAR(I, utf8_xidstart, SV *)
999 PERLVAR(I, WB_invlist, SV *)
1000 PERLVARA(I, XPosix_ptrs, POSIX_CC_COUNT, SV *)
1001 PERLVARA(I, Posix_ptrs, POSIX_CC_COUNT, SV *)
1002 PERLVAR(I, utf8_toupper, SV *)
1003 PERLVAR(I, utf8_totitle, SV *)
1004 PERLVAR(I, utf8_tolower, SV *)
1005 PERLVAR(I, utf8_tofold, SV *)
1006 PERLVAR(I, utf8_tosimplefold, SV *)
1007 PERLVAR(I, utf8_charname_begin, SV *)
1008 PERLVAR(I, utf8_charname_continue, SV *)
1009 PERLVAR(I, utf8_mark, SV *)
1010 PERLVARI(I, InBitmap, SV *, NULL)
1011 PERLVAR(I, CCC_non0_non230, SV *)
1012 PERLVAR(I, Private_Use, SV *)
1015 PERLVAR(I, mbrlen_ps, mbstate_t)
1018 PERLVAR(I, mbrtowc_ps, mbstate_t)
1021 PERLVAR(I, wcrtomb_ps, mbstate_t)
1024 /* If you are adding a U8 or U16, check to see if there are 'Space' comments
1025 * above on where there are gaps which currently will be structure padding. */
1027 /* Within a stable branch, new variables must be added to the very end, before
1028 * this comment, for binary compatibility (the offsets of the old members must
1030 * (Don't forget to add your variable also to perl_clone()!)