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.
14 =head1 Per-Interpreter Variables
17 /* These variables are per-interpreter in threaded/multiplicity builds,
20 * Don't forget to re-run regen/embed.pl to propagate changes! */
22 /* New variables must be added to the very end for binary compatibility. */
24 /* Don't forget to add your variable also to perl_clone()! (in sv.c) */
26 /* The 'I' prefix is only needed for vars that need appropriate #defines
27 * generated when built with or without MULTIPLICITY. It is also used
28 * to generate the appropriate export list for win32. If the variable
29 * needs to be initialized, use PERLVARI.
31 * When building without MULTIPLICITY, these variables will be truly global.
33 * Important ones in the first cache line (if alignment is done right) */
35 PERLVAR(I, stack_sp, SV **) /* top of the stack */
36 PERLVAR(I, op, OP *) /* currently executing op */
37 PERLVAR(I, curpad, SV **) /* active pad (lexicals+tmps) */
39 PERLVAR(I, stack_base, SV **)
40 PERLVAR(I, stack_max, SV **)
42 PERLVAR(I, savestack, ANY *) /* items that need to be restored when
43 LEAVEing scopes we've ENTERed */
44 PERLVAR(I, savestack_ix, I32)
45 PERLVAR(I, savestack_max, I32)
47 PERLVAR(I, scopestack, I32 *) /* scopes we've ENTERed */
48 PERLVAR(I, scopestack_ix, I32)
49 PERLVAR(I, scopestack_max, I32)
51 PERLVAR(I, tmps_stack, SV **) /* mortals we've made */
52 PERLVARI(I, tmps_ix, SSize_t, -1)
53 PERLVARI(I, tmps_floor, SSize_t, -1)
54 PERLVAR(I, tmps_max, SSize_t) /* first unalloced slot in tmps stack */
56 PERLVARI(I, sub_generation, U32, 1) /* incr to invalidate method cache */
58 PERLVAR(I, markstack, I32 *) /* stack_sp locations we're
60 PERLVAR(I, markstack_ptr, I32 *)
61 PERLVAR(I, markstack_max, I32 *)
63 #ifdef PERL_HASH_RANDOMIZE_KEYS
64 #ifdef USE_PERL_PERTURB_KEYS
65 PERLVARI(I, hash_rand_bits_enabled, U8, 1) /* used to randomize hash stuff 0 == no-random, 1 == random, 2 == determinsitic */
67 PERLVARI(I, hash_rand_bits, UV, 0) /* used to randomize hash stuff */
69 PERLVAR(I, strtab, HV *) /* shared string table */
70 /* prog counter for the currently executing OP_MULTIDEREF Used to signal
71 * to S_find_uninit_var() where we are */
72 PERLVAR(I, multideref_pc, UNOP_AUX_item *)
74 /* Fields used by magic variables such as $@, $/ and so on */
75 PERLVAR(I, curpm, PMOP *) /* what to do \ interps in REs from */
76 PERLVAR(I, curpm_under, PMOP *) /* what to do \ interps in REs from */
78 PERLVAR(I, tainting, bool) /* doing taint checks */
79 PERLVARI(I, tainted, bool, FALSE) /* using variables controlled by $< */
81 /* PL_delaymagic is currently used for two purposes: to assure simultaneous
82 * updates in ($<,$>) = ..., and to assure atomic update in push/unshift
83 * @ISA, It works like this: a few places such as pp_push set the DM_DELAY
84 * flag; then various places such as av_store() skip mg_set(ary) if this
85 * flag is set, and various magic vtable methods set flags like
86 * DM_ARRAY_ISA if they've seen something of that ilk. Finally when
87 * control returns to pp_push or whatever, it sees if any of those flags
88 * have been set, and if so finally calls mg_set().
90 * NB: PL_delaymagic is automatically saved and restored by JUMPENV_PUSH
91 * / POP. This removes the need to do ENTER/SAVEI16(PL_delaymagic)/LEAVE
92 * in hot code like pp_push.
94 PERLVAR(I, delaymagic, U16) /* ($<,$>) = ... */
96 PERLVAR(I, localizing, U8) /* are we processing a local() list? */
97 PERLVAR(I, in_eval, U8) /* trap "fatal" errors? */
98 PERLVAR(I, defgv, GV *) /* the *_ glob */
101 =for apidoc mn|U8|PL_dowarn
103 The C variable that roughly corresponds to Perl's C<$^W> warning variable.
104 However, C<$^W> is treated as a boolean, whereas C<PL_dowarn> is a
105 collection of flag bits.
110 PERLVAR(I, dowarn, U8)
112 #if defined (PERL_UTF8_CACHE_ASSERT) || defined (DEBUGGING)
117 PERLVARI(I, utf8cache, I8, PERL___I) /* Is the utf8 caching code enabled? */
122 PERLVAR(I, defstash, HV *) /* main symbol table */
123 PERLVAR(I, curstash, HV *) /* symbol table for current package */
125 PERLVAR(I, curcop, COP *)
126 PERLVAR(I, curstack, AV *) /* THE STACK */
127 PERLVAR(I, curstackinfo, PERL_SI *) /* current stack + context */
128 PERLVAR(I, mainstack, AV *) /* the stack when nothing funny is
131 /* memory management */
132 PERLVAR(I, sv_count, IV) /* how many SV* are currently allocated */
134 PERLVAR(I, sv_root, SV *) /* storage for SVs belonging to interp */
135 PERLVAR(I, sv_arenaroot, SV *) /* list of areas for garbage collection */
137 /* fake PMOP that PL_curpm points to while in (?{}) so $1 et al are visible */
138 PERLVARI(I, reg_curpm, PMOP*, NULL)
140 /* the currently active slab in a chain of slabs of regmatch states,
141 * and the currently active state within that slab. This stack of states
142 * is shared amongst re-entrant calls to the regex engine */
144 PERLVARI(I, regmatch_slab, regmatch_slab *, NULL)
145 PERLVAR(I, regmatch_state, regmatch_state *)
147 PERLVAR(I, comppad, PAD *) /* storage for lexically scoped temporaries */
150 =for apidoc Amn|SV|PL_sv_undef
151 This is the C<undef> SV. Always refer to this as C<&PL_sv_undef>.
153 =for apidoc Amn|SV|PL_sv_no
154 This is the C<false> SV. See C<L</PL_sv_yes>>. Always refer to this as
157 =for apidoc Amn|SV|PL_sv_yes
158 This is the C<true> SV. See C<L</PL_sv_no>>. Always refer to this as
161 =for apidoc Amn|SV|PL_sv_zero
162 This readonly SV has a zero numeric value and a C<"0"> string value. It's
163 similar to C<L</PL_sv_no>> except for its string value. Can be used as a
164 cheap alternative to C<mXPUSHi(0)> for example. Always refer to this as
165 C<&PL_sv_zero>. Introduced in 5.28.
171 PERLVAR(I, sv_yes, SV)
172 PERLVAR(I, sv_undef, SV)
173 PERLVAR(I, sv_no, SV)
174 PERLVAR(I, sv_zero, SV)
176 /* store the immortals as an array to ensure they are contiguous in
177 * memory: makes SvIMMORTAL_INTERP(sv) possible */
178 PERLVARA(I, sv_immortals, 4, SV)
181 PERLVAR(I, padname_undef, PADNAME)
182 PERLVAR(I, padname_const, PADNAME)
183 PERLVAR(I, Sv, SV *) /* used to hold temporary values */
185 PERLVAR(I, parser, yy_parser *) /* current parser state */
187 PERLVAR(I, stashcache, HV *) /* Cache to speed up S_method_common */
191 =for apidoc Amn|STRLEN|PL_na
193 A convenience variable which is typically used with C<SvPV> when one
194 doesn't care about the length of the string. It is usually more efficient
195 to either declare a local variable and use that instead or to use the
201 PERLVAR(I, na, STRLEN) /* for use in SvPV when length is
205 PERLVAR(I, statcache, Stat_t) /* _ */
206 PERLVAR(I, statgv, GV *)
207 PERLVARI(I, statname, SV *, NULL)
210 =for apidoc mn|SV*|PL_rs
212 The input record separator - C<$/> in Perl space.
214 =for apidoc mn|GV*|PL_last_in_gv
216 The GV which was last used for a filehandle input operation. (C<< <FH> >>)
218 =for apidoc mn|GV*|PL_ofsgv
220 The glob containing the output field separator - C<*,> in Perl space.
225 PERLVAR(I, rs, SV *) /* input record separator $/ */
226 PERLVAR(I, last_in_gv, GV *) /* GV used in last <FH> */
227 PERLVAR(I, ofsgv, GV *) /* GV of output field separator *, */
228 PERLVAR(I, defoutgv, GV *) /* default FH for output */
229 PERLVARI(I, chopset, const char *, " \n-") /* $: */
230 PERLVAR(I, formtarget, SV *)
231 PERLVAR(I, bodytarget, SV *)
232 PERLVAR(I, toptarget, SV *)
235 PERLVAR(I, restartop, OP *) /* propagating an error from croak? */
236 PERLVAR(I, restartjmpenv, JMPENV *) /* target frame for longjmp in die */
238 PERLVAR(I, top_env, JMPENV *) /* ptr to current sigjmp environment */
239 PERLVAR(I, start_env, JMPENV) /* empty startup sigjmp environment */
240 PERLVARI(I, errors, SV *, NULL) /* outstanding queued errors */
242 /* statics "owned" by various functions */
243 PERLVAR(I, hv_fetch_ent_mh, HE*) /* owned by hv_fetch_ent() */
245 PERLVAR(I, lastgotoprobe, OP*) /* from pp_ctl.c */
248 PERLVAR(I, sortcop, OP *) /* user defined sort routine */
249 PERLVAR(I, sortstash, HV *) /* which is in some package or other */
250 PERLVAR(I, firstgv, GV *) /* $a */
251 PERLVAR(I, secondgv, GV *) /* $b */
254 PERLVAR(I, efloatbuf, char *)
255 PERLVAR(I, efloatsize, STRLEN)
257 PERLVARI(I, dumpindent, U16, 4) /* number of blanks per dump
260 PERLVAR(I, exit_flags, U8) /* was exit() unexpected, etc. */
262 PERLVAR(I, utf8locale, bool) /* utf8 locale detected */
263 PERLVAR(I, in_utf8_CTYPE_locale, bool)
264 PERLVAR(I, in_utf8_COLLATE_locale, bool)
265 #if defined(USE_ITHREADS) && ! defined(USE_THREAD_SAFE_LOCALE)
266 PERLVARI(I, lc_numeric_mutex_depth, int, 0) /* Emulate general semaphore */
268 PERLVARA(I, locale_utf8ness, 256, char)
270 #ifdef USE_LOCALE_CTYPE
271 PERLVAR(I, warn_locale, SV *)
274 PERLVARA(I, colors,6, char *) /* values from PERL_RE_COLORS env var */
277 =for apidoc Amn|peep_t|PL_peepp
279 Pointer to the per-subroutine peephole optimiser. This is a function
280 that gets called at the end of compilation of a Perl subroutine (or
281 equivalently independent piece of Perl code) to perform fixups of
282 some ops and to perform small-scale optimisations. The function is
283 called once for each subroutine that is compiled, and is passed, as sole
284 parameter, a pointer to the op that is the entry point to the subroutine.
285 It modifies the op tree in place.
287 The peephole optimiser should never be completely replaced. Rather,
288 add code to it by wrapping the existing optimiser. The basic way to do
289 this can be seen in L<perlguts/Compile pass 3: peephole optimization>.
290 If the new code wishes to operate on ops throughout the subroutine's
291 structure, rather than just at the top level, it is likely to be more
292 convenient to wrap the L</PL_rpeepp> hook.
297 PERLVARI(I, peepp, peep_t, Perl_peep)
300 =for apidoc Amn|peep_t|PL_rpeepp
302 Pointer to the recursive peephole optimiser. This is a function
303 that gets called at the end of compilation of a Perl subroutine (or
304 equivalently independent piece of Perl code) to perform fixups of some
305 ops and to perform small-scale optimisations. The function is called
306 once for each chain of ops linked through their C<op_next> fields;
307 it is recursively called to handle each side chain. It is passed, as
308 sole parameter, a pointer to the op that is at the head of the chain.
309 It modifies the op tree in place.
311 The peephole optimiser should never be completely replaced. Rather,
312 add code to it by wrapping the existing optimiser. The basic way to do
313 this can be seen in L<perlguts/Compile pass 3: peephole optimization>.
314 If the new code wishes to operate only on ops at a subroutine's top level,
315 rather than throughout the structure, it is likely to be more convenient
316 to wrap the L</PL_peepp> hook.
321 PERLVARI(I, rpeepp, peep_t, Perl_rpeep)
324 =for apidoc Amn|Perl_ophook_t|PL_opfreehook
326 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.
327 This allows extensions to free any extra attribute they have locally attached to an OP.
328 It is also assured to first fire for the parent OP and then for its kids.
330 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.
335 PERLVARI(I, opfreehook, Perl_ophook_t, 0) /* op_free() hook */
337 PERLVARI(I, watchaddr, char **, 0)
338 PERLVAR(I, watchok, char *)
340 PERLVAR(I, perldb, U32)
342 PERLVAR(I, signals, U32) /* Using which pre-5.8 signals */
344 PERLVAR(I, reentrant_retint, int) /* Integer return value from reentrant functions */
346 /* pseudo environmental stuff */
347 PERLVAR(I, origargc, int)
348 PERLVAR(I, origargv, char **)
349 PERLVAR(I, envgv, GV *)
350 PERLVAR(I, incgv, GV *)
351 PERLVAR(I, hintgv, GV *)
352 PERLVAR(I, origfilename, char *)
353 PERLVARI(I, xsubfilename, const char *, NULL)
354 PERLVAR(I, diehook, SV *)
355 PERLVAR(I, warnhook, SV *)
358 PERLVAR(I, patchlevel, SV *)
359 PERLVAR(I, localpatches, const char * const *)
360 PERLVARI(I, splitstr, const char *, " ")
362 PERLVAR(I, minus_c, bool)
363 PERLVAR(I, minus_n, bool)
364 PERLVAR(I, minus_p, bool)
365 PERLVAR(I, minus_l, bool)
366 PERLVAR(I, minus_a, bool)
367 PERLVAR(I, minus_F, bool)
368 PERLVAR(I, doswitches, bool)
369 PERLVAR(I, minus_E, bool)
371 PERLVAR(I, inplace, char *)
372 PERLVAR(I, e_script, SV *)
374 PERLVAR(I, basetime, Time_t) /* $^T */
376 PERLVARI(I, maxsysfd, I32, MAXSYSFD)
377 /* top fd to pass to subprocesses */
378 PERLVAR(I, statusvalue, I32) /* $? */
380 PERLVAR(I, statusvalue_vms, U32)
382 PERLVAR(I, statusvalue_posix, I32)
385 PERLVARI(I, sig_pending, int, 0) /* Number if highest signal pending */
386 PERLVAR(I, psig_pend, int *) /* per-signal "count" of pending */
388 /* shortcuts to various I/O objects */
389 PERLVAR(I, stdingv, GV *) /* *STDIN */
390 PERLVAR(I, stderrgv, GV *) /* *STDERR */
391 PERLVAR(I, argvgv, GV *) /* *ARGV */
392 PERLVAR(I, argvoutgv, GV *) /* *ARGVOUT */
393 PERLVAR(I, argvout_stack, AV *)
395 /* shortcuts to regexp stuff */
396 PERLVAR(I, replgv, GV *) /* *^R */
398 /* shortcuts to misc objects */
399 PERLVAR(I, errgv, GV *) /* *@ */
401 /* shortcuts to debugging objects */
402 PERLVAR(I, DBgv, GV *) /* *DB::DB */
403 PERLVAR(I, DBline, GV *) /* *DB::line */
406 =for apidoc mn|GV *|PL_DBsub
407 When Perl is run in debugging mode, with the B<-d> switch, this GV contains
408 the SV which holds the name of the sub being debugged. This is the C
409 variable which corresponds to Perl's $DB::sub variable. See
412 =for apidoc mn|SV *|PL_DBsingle
413 When Perl is run in debugging mode, with the B<-d> switch, this SV is a
414 boolean which indicates whether subs are being single-stepped.
415 Single-stepping is automatically turned on after every step. This is the C
416 variable which corresponds to Perl's $DB::single variable. See
419 =for apidoc mn|SV *|PL_DBtrace
420 Trace variable used when Perl is run in debugging mode, with the B<-d>
421 switch. This is the C variable which corresponds to Perl's $DB::trace
422 variable. See C<L</PL_DBsingle>>.
427 PERLVAR(I, DBsub, GV *) /* *DB::sub */
428 PERLVAR(I, DBsingle, SV *) /* $DB::single */
429 PERLVAR(I, DBtrace, SV *) /* $DB::trace */
430 PERLVAR(I, DBsignal, SV *) /* $DB::signal */
431 PERLVAR(I, dbargs, AV *) /* args to call listed by caller function */
433 PERLVARA(I, DBcontrol, DBVARMG_COUNT, IV) /* IV versions of $DB::single, trace, signal */
436 PERLVAR(I, debstash, HV *) /* symbol table for perldb package */
437 PERLVAR(I, globalstash, HV *) /* global keyword overrides imported here */
438 PERLVAR(I, curstname, SV *) /* name of current package */
439 PERLVAR(I, beginav, AV *) /* names of BEGIN subroutines */
440 PERLVAR(I, endav, AV *) /* names of END subroutines */
441 PERLVAR(I, unitcheckav, AV *) /* names of UNITCHECK subroutines */
442 PERLVAR(I, checkav, AV *) /* names of CHECK subroutines */
443 PERLVAR(I, initav, AV *) /* names of INIT subroutines */
445 /* subprocess state */
446 PERLVAR(I, fdpid, AV *) /* keep fd-to-pid mappings for my_popen */
449 PERLVARI(I, op_mask, char *, NULL) /* masked operations for safe evals */
451 /* current interpreter roots */
452 PERLVAR(I, main_cv, CV *)
453 PERLVAR(I, main_root, OP *)
454 PERLVAR(I, main_start, OP *)
455 PERLVAR(I, eval_root, OP *)
456 PERLVAR(I, eval_start, OP *)
458 /* runtime control stuff */
459 PERLVARI(I, curcopdb, COP *, NULL)
461 PERLVAR(I, filemode, int) /* so nextargv() can preserve mode */
462 PERLVAR(I, lastfd, int) /* what to preserve mode on */
463 PERLVAR(I, oldname, char *) /* what to preserve mode on */
464 /* Elements in this array have ';' appended and are injected as a single line
465 into the tokeniser. You can't put any (literal) newlines into any program
466 you stuff in into this array, as the point where it's injected is expecting
467 a single physical line. */
468 PERLVAR(I, preambleav, AV *)
469 PERLVAR(I, mess_sv, SV *)
470 PERLVAR(I, ors_sv, SV *) /* output record separator $\ */
472 /* funky return mechanisms */
473 PERLVAR(I, forkprocess, int) /* so do_open |- can return proc# */
475 /* statics moved here for shared library purposes */
476 PERLVARI(I, gensym, I32, 0) /* next symbol for getsym() to define */
477 PERLVARI(I, cv_has_eval, bool, FALSE) /* PL_compcv includes an entereval or similar */
478 PERLVAR(I, taint_warn, bool) /* taint warns instead of dying */
479 PERLVARI(I, laststype, U16, OP_STAT)
481 PERLVARI(I, laststatval, int, -1)
483 PERLVAR(I, modcount, I32) /* how much op_lvalue()ification in
486 /* interpreter atexit processing */
487 PERLVARI(I, exitlistlen, I32, 0) /* length of same */
488 PERLVARI(I, exitlist, PerlExitListEntry *, NULL)
489 /* list of exit functions */
492 =for apidoc Amn|HV*|PL_modglobal
494 C<PL_modglobal> is a general purpose, interpreter global HV for use by
495 extensions that need to keep information on a per-interpreter basis.
496 In a pinch, it can also be used as a symbol table for extensions
497 to share data among each other. It is a good idea to use keys
498 prefixed by the package name of the extension that owns the data.
503 PERLVAR(I, modglobal, HV *) /* per-interp module data */
505 /* these used to be in global before 5.004_68 */
506 PERLVARI(I, profiledata, U32 *, NULL) /* table of ops, counts */
508 PERLVAR(I, compiling, COP) /* compiling/done executing marker */
510 PERLVAR(I, compcv, CV *) /* currently compiling subroutine */
511 PERLVAR(I, comppad_name, PADNAMELIST *) /* variable names for "my" variables */
512 PERLVAR(I, comppad_name_fill, PADOFFSET)/* last "introduced" variable offset */
513 PERLVAR(I, comppad_name_floor, PADOFFSET)/* start of vars in innermost block */
515 #ifdef HAVE_INTERP_INTERN
516 PERLVAR(I, sys_intern, struct interp_intern)
517 /* platform internals */
520 /* more statics moved here */
521 PERLVAR(I, DBcv, CV *) /* from perl.c */
522 PERLVARI(I, generation, int, 100) /* scan sequence# for OP_AASSIGN
523 compile-time common elem detection */
525 PERLVAR(I, unicode, U32) /* Unicode features: $ENV{PERL_UNICODE} or -C */
527 PERLVARI(I, in_clean_objs,bool, FALSE) /* from sv.c */
528 PERLVARI(I, in_clean_all, bool, FALSE) /* ptrs to freed SVs now legal */
529 PERLVAR(I, nomemok, bool) /* let malloc context handle nomem */
530 PERLVARI(I, savebegin, bool, FALSE) /* save BEGINs for compiler */
533 PERLVAR(I, delaymagic_uid, Uid_t) /* current real user id, only for delaymagic */
534 PERLVAR(I, delaymagic_euid, Uid_t) /* current effective user id, only for delaymagic */
535 PERLVAR(I, delaymagic_gid, Gid_t) /* current real group id, only for delaymagic */
536 PERLVAR(I, delaymagic_egid, Gid_t) /* current effective group id, only for delaymagic */
537 PERLVARI(I, an, U32, 0) /* malloc sequence number */
539 /* Perl_Ibreakable_sub_generation_ptr was too long for VMS, hence "gen" */
540 PERLVARI(I, breakable_sub_gen, U32, 0)
543 /* exercise wrap-around */
544 #define PERL_COP_SEQMAX (U32_MAX-50)
546 #define PERL_COP_SEQMAX 0
548 PERLVARI(I, cop_seqmax, U32, PERL_COP_SEQMAX) /* statement sequence number */
549 #undef PERL_COP_SEQMAX
551 PERLVARI(I, evalseq, U32, 0) /* eval sequence number */
552 PERLVAR(I, origalen, U32)
553 PERLVAR(I, origenviron, char **)
554 #ifdef PERL_USES_PL_PIDSTATUS
555 PERLVAR(I, pidstatus, HV *) /* pid-to-status mappings for waitpid */
557 PERLVAR(I, osname, char *) /* operating system */
559 PERLVAR(I, sighandlerp, Sighandler_t)
561 PERLVARA(I, body_roots, PERL_ARENA_ROOTS_SIZE, void*) /* array of body roots */
563 PERLVAR(I, debug, volatile U32) /* flags given to -D switch */
565 PERLVARI(I, padlist_generation, U32, 1) /* id to identify padlist clones */
567 PERLVARI(I, runops, runops_proc_t, RUNOPS_DEFAULT)
569 PERLVAR(I, subname, SV *) /* name of current subroutine */
571 PERLVAR(I, subline, I32) /* line this subroutine began on */
572 PERLVAR(I, min_intro_pending, PADOFFSET)/* start of vars to introduce */
574 PERLVAR(I, max_intro_pending, PADOFFSET)/* end of vars to introduce */
575 PERLVAR(I, padix, PADOFFSET) /* lowest unused index - 1
576 in current "register" pad */
577 PERLVAR(I, constpadix, PADOFFSET) /* lowest unused for constants */
579 PERLVAR(I, padix_floor, PADOFFSET) /* how low may inner block reset padix */
581 #if defined(USE_POSIX_2008_LOCALE) \
582 && defined(USE_THREAD_SAFE_LOCALE) \
583 && ! defined(HAS_QUERYLOCALE)
585 PERLVARA(I, curlocales, 12, char *)
588 #ifdef USE_LOCALE_COLLATE
590 PERLVAR(I, collation_name, char *) /* Name of current collation */
591 PERLVAR(I, collxfrm_base, Size_t) /* Basic overhead in *xfrm() */
592 PERLVARI(I, collxfrm_mult,Size_t, 2) /* Expansion factor in *xfrm() */
593 PERLVARI(I, collation_ix, U32, 0) /* Collation generation index */
594 PERLVARI(I, strxfrm_NUL_replacement, U8, 0) /* Code point to replace NULs */
595 PERLVARI(I, strxfrm_is_behaved, bool, TRUE)
596 /* Assume until proven otherwise that it works */
597 PERLVARI(I, strxfrm_max_cp, U8, 0) /* Highest collating cp in locale */
598 PERLVARI(I, collation_standard, bool, TRUE)
599 /* Assume simple collation */
600 #endif /* USE_LOCALE_COLLATE */
602 PERLVARI(I, langinfo_buf, char *, NULL)
603 PERLVARI(I, langinfo_bufsize, Size_t, 0)
604 PERLVARI(I, setlocale_buf, char *, NULL)
605 PERLVARI(I, setlocale_bufsize, Size_t, 0)
607 #ifdef PERL_SAWAMPERSAND
608 PERLVAR(I, sawampersand, U8) /* must save all match strings */
611 PERLVAR(I, unsafe, bool)
612 PERLVAR(I, colorset, bool) /* PERL_RE_COLORS env var is in use */
614 /* current phase the interpreter is in
615 for ordering this structure to remove holes, we're assuming that this is 4
617 PERLVARI(I, phase, enum perl_phase, PERL_PHASE_CONSTRUCT)
619 PERLVARI(I, in_load_module, bool, FALSE) /* to prevent recursions in PerlIO_find_layer */
621 /* This value may be set when embedding for full cleanup */
622 /* 0=none, 1=full, 2=full with checks */
623 /* mod_perl is special, and also assigns a meaning -1 */
624 PERLVARI(I, perl_destruct_level, signed char, 0)
626 #ifdef USE_LOCALE_NUMERIC
628 PERLVARI(I, numeric_standard, int, TRUE)
629 /* Assume C locale numerics */
630 PERLVARI(I, numeric_underlying, bool, TRUE)
631 /* Assume underlying locale numerics */
632 PERLVARI(I, numeric_underlying_is_standard, bool, TRUE)
633 PERLVAR(I, numeric_name, char *) /* Name of current numeric locale */
634 PERLVAR(I, numeric_radix_sv, SV *) /* The radix separator if not '.' */
636 # ifdef HAS_POSIX_2008_LOCALE
638 PERLVARI(I, underlying_numeric_obj, locale_t, NULL)
641 #endif /* !USE_LOCALE_NUMERIC */
643 /* utf8 character class swashes */
644 PERLVAR(I, seen_deprecated_macro, HV *)
646 PERLVAR(I, last_swash_hv, HV *)
647 PERLVAR(I, last_swash_tmps, U8 *)
648 PERLVAR(I, last_swash_slen, STRLEN)
649 PERLVARA(I, last_swash_key,UTF8_MAXBYTES-1, U8)
650 PERLVAR(I, last_swash_klen, U8) /* Only needs to store 0-12 */
653 PERLVARI(I, cryptseen, bool, FALSE) /* has fast crypt() been initialized? */
655 /* One byte hole in the interpreter structure. */
658 PERLVAR(I, pad_reset_pending, bool) /* reset pad on next attempted alloc */
659 PERLVAR(I, srand_called, bool)
661 /* Array of signal handlers, indexed by signal number, through which the C
662 signal handler dispatches. */
663 PERLVAR(I, psig_ptr, SV **)
664 /* Array of names of signals, indexed by signal number, for (re)use as the first
665 argument to a signal handler. Only one block of memory is allocated for
666 both psig_name and psig_ptr. */
667 PERLVAR(I, psig_name, SV **)
669 #if defined(PERL_IMPLICIT_SYS)
670 PERLVAR(I, Mem, struct IPerlMem *)
671 PERLVAR(I, MemShared, struct IPerlMem *)
672 PERLVAR(I, MemParse, struct IPerlMem *)
673 PERLVAR(I, Env, struct IPerlEnv *)
674 PERLVAR(I, StdIO, struct IPerlStdIO *)
675 PERLVAR(I, LIO, struct IPerlLIO *)
676 PERLVAR(I, Dir, struct IPerlDir *)
677 PERLVAR(I, Sock, struct IPerlSock *)
678 PERLVAR(I, Proc, struct IPerlProc *)
681 PERLVAR(I, ptr_table, PTR_TBL_t *)
682 PERLVARI(I, beginav_save, AV *, NULL) /* save BEGIN{}s when compiling */
684 PERLVAR(I, body_arenas, void *) /* pointer to list of body-arenas */
687 #if defined(USE_ITHREADS)
688 PERLVAR(I, regex_pad, SV **) /* Shortcut into the array of
690 PERLVAR(I, regex_padav, AV *) /* All regex objects, indexed via the
691 values in op_pmoffset of pmop.
692 Entry 0 is an SV whose PV is a
693 "packed" list of IVs listing
694 the now-free slots in the array */
695 PERLVAR(I, stashpad, HV **) /* for CopSTASH */
696 PERLVARI(I, stashpadmax, PADOFFSET, 64)
697 PERLVARI(I, stashpadix, PADOFFSET, 0)
700 #ifdef USE_REENTRANT_API
701 PERLVAR(I, reentrant_buffer, REENTR *) /* here we store the _r buffers */
704 PERLVAR(I, custom_op_names, HV *) /* Names of user defined ops */
705 PERLVAR(I, custom_op_descs, HV *) /* Descriptions of user defined ops */
708 PERLVARI(I, perlio, PerlIOl *, NULL)
709 PERLVARI(I, known_layers, PerlIO_list_t *, NULL)
710 PERLVARI(I, def_layerlist, PerlIO_list_t *, NULL)
713 PERLVAR(I, sort_RealCmp, SVCOMPARE_t)
715 PERLVARI(I, checkav_save, AV *, NULL) /* save CHECK{}s when compiling */
716 PERLVARI(I, unitcheckav_save, AV *, NULL)
717 /* save UNITCHECK{}s when compiling */
719 PERLVARI(I, clocktick, long, 0) /* this many times() ticks in a second */
721 /* Hooks to shared SVs and locks. */
722 PERLVARI(I, sharehook, share_proc_t, Perl_sv_nosharing)
723 PERLVARI(I, lockhook, share_proc_t, Perl_sv_nosharing)
725 # define PERL_UNLOCK_HOOK Perl_sv_nosharing
727 /* This reference ensures that the mathoms are linked with perl */
728 # define PERL_UNLOCK_HOOK Perl_sv_nounlocking
730 PERLVARI(I, unlockhook, share_proc_t, PERL_UNLOCK_HOOK)
732 PERLVARI(I, threadhook, thrhook_proc_t, Perl_nothreadhook)
734 /* Can shared object be destroyed */
735 PERLVARI(I, destroyhook, destroyable_proc_t, Perl_sv_destroyable)
738 PERLVARI(I, signalhook, despatch_signals_proc_t, Perl_despatch_signals)
741 PERLVARI(I, isarev, HV *, NULL) /* Reverse map of @ISA dependencies */
743 /* Register of known Method Resolution Orders.
744 What this actually points to is an implementation detail (it may change to
745 a structure incorporating a reference count - use mro_get_from_name to
746 retrieve a C<struct mro_alg *> */
747 PERLVAR(I, registered_mros, HV *)
749 /* Compile-time block start/end hooks */
750 PERLVAR(I, blockhooks, AV *)
752 PERLVAR(I, custom_ops, HV *) /* custom op registrations */
754 PERLVAR(I, Xpv, XPV *) /* (unused) held temporary value */
756 /* name of the scopes we've ENTERed. Only used with -DDEBUGGING, but needs to be
757 present always, as -DDEBUGGING must be binary compatible with non. */
758 PERLVARI(I, scopestack_name, const char * *, NULL)
760 PERLVAR(I, debug_pad, struct perl_debug_pad) /* always needed because of the re extension */
762 /* Hook for File::Glob */
763 PERLVARI(I, globhook, globhook_t, NULL)
765 /* The last unconditional member of the interpreter structure when 5.18.0 was
766 released. The offset of the end of this is baked into a global variable in
767 any shared perl library which will allow a sanity test in future perl
769 #define PERL_LAST_5_18_0_INTERP_MEMBER Iglobhook
771 #ifdef PERL_IMPLICIT_CONTEXT
772 PERLVARI(I, my_cxt_list, void **, NULL) /* per-module array of MY_CXT pointers */
773 PERLVARI(I, my_cxt_size, int, 0) /* size of PL_my_cxt_list */
774 # ifdef PERL_GLOBAL_STRUCT_PRIVATE
775 PERLVARI(I, my_cxt_keys, const char **, NULL) /* per-module array of pointers to MY_CXT_KEY constants */
779 #if defined(PERL_IMPLICIT_CONTEXT) || defined(PERL_DEBUG_READONLY_COW)
780 /* For use with the memory debugging code in util.c. This is used only in
781 * DEBUGGING builds (as long as the relevant structure is defined), but
782 * defining it in non-debug builds too means that we retain binary
783 * compatibility between otherwise-compatible plain and debug builds. */
784 PERLVAR(I, memory_debug_header, struct perl_memory_debug_header)
787 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
788 /* File descriptor to talk to the child which dumps scalars. */
789 PERLVARI(I, dumper_fd, int, -1)
793 #ifdef DEBUG_LEAKING_SCALARS
794 PERLVARI(I, sv_serial, U32, 0) /* SV serial number, used in sv.c */
797 PERLVARA(I, sv_consts, SV_CONSTS_COUNT, SV*) /* constant SVs with precomputed hash value */
799 #ifdef PERL_TRACE_OPS
800 PERLVARA(I, op_exec_cnt, OP_max+2, UV) /* Counts of executed OPs of the given type.
801 If PERL_TRACE_OPS is enabled, we'll dump
802 a summary count of all ops executed in the
803 program at perl_destruct time. For
804 profiling/debugging only. Works only if
805 DEBUGGING is enabled, too. */
808 PERLVAR(I, random_state, PL_RANDOM_STATE_TYPE)
810 PERLVARI(I, dump_re_max_len, STRLEN, 60)
812 /* For internal uses of randomness, this ensures the sequence of
813 * random numbers returned by rand() isn't modified by perl's internal
815 * This is important if the user has called srand() with a seed.
818 PERLVAR(I, internal_random_state, PL_RANDOM_STATE_TYPE)
820 /* If you are adding a U8 or U16, check to see if there are 'Space' comments
821 * above on where there are gaps which currently will be structure padding. */
823 /* Within a stable branch, new variables must be added to the very end, before
824 * this comment, for binary compatibility (the offsets of the old members must
826 * (Don't forget to add your variable also to perl_clone()!)
827 * XSUB.h provides wrapper functions via perlapi.h that make this
828 * irrelevant, but not all code may be expected to #include XSUB.h.