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 $< */
81 /* PL_delaymagic is currently used for two purposes: to assure simultaneous
82 * updates in ($<,$>) = ..., and to assure atomic update in push/unshift
83 * @ISA, It works like this: a few places such as pp_push set the DM_DELAY
84 * flag; then various places such as av_store() skip mg_set(ary) if this
85 * flag is set, and various magic vtable methods set flags like
86 * DM_ARRAY_ISA if they've seen something of that ilk. Finally when
87 * control returns to pp_push or whatever, it sees if any of those flags
88 * have been set, and if so finally calls mg_set().
90 * NB: PL_delaymagic is automatically saved and restored by JUMPENV_PUSH
91 * / POP. This removes the need to do ENTER/SAVEI16(PL_delaymagic)/LEAVE
92 * in hot code like pp_push.
94 PERLVAR(I, delaymagic, U16) /* ($<,$>) = ... */
97 =for apidoc Amn|GV *|PL_defgv
99 The GV representing C<*_>. Useful for access to C<$_>.
104 PERLVAR(I, localizing, U8) /* are we processing a local() list? */
105 PERLVAR(I, in_eval, U8) /* trap "fatal" errors? */
106 PERLVAR(I, defgv, GV *) /* the *_ glob */
109 =for apidoc mn|U8|PL_dowarn
111 The C variable that roughly corresponds to Perl's C<$^W> warning variable.
112 However, C<$^W> is treated as a boolean, whereas C<PL_dowarn> is a
113 collection of flag bits.
118 PERLVAR(I, dowarn, U8)
120 #if defined (PERL_UTF8_CACHE_ASSERT) || defined (DEBUGGING)
125 PERLVARI(I, utf8cache, I8, PERL___I) /* Is the utf8 caching code enabled? */
129 =for apidoc Amn|HV*|PL_curstash
131 The stash for the package code will be compiled into.
137 PERLVAR(I, defstash, HV *) /* main symbol table */
138 PERLVAR(I, curstash, HV *) /* symbol table for current package */
141 =for apidoc Amn|COP*|PL_curcop
143 The currently active COP (control op) roughly representing the current
144 statement in the source.
149 PERLVAR(I, curcop, COP *)
150 PERLVAR(I, curstack, AV *) /* THE STACK */
151 PERLVAR(I, curstackinfo, PERL_SI *) /* current stack + context */
152 PERLVAR(I, mainstack, AV *) /* the stack when nothing funny is
155 /* memory management */
156 PERLVAR(I, sv_count, IV) /* how many SV* are currently allocated */
158 PERLVAR(I, sv_root, SV *) /* storage for SVs belonging to interp */
159 PERLVAR(I, sv_arenaroot, SV *) /* list of areas for garbage collection */
161 /* fake PMOP that PL_curpm points to while in (?{}) so $1 et al are visible */
162 PERLVARI(I, reg_curpm, PMOP*, NULL)
164 /* the currently active slab in a chain of slabs of regmatch states,
165 * and the currently active state within that slab. This stack of states
166 * is shared amongst re-entrant calls to the regex engine */
168 PERLVARI(I, regmatch_slab, regmatch_slab *, NULL)
169 PERLVAR(I, regmatch_state, regmatch_state *)
171 PERLVAR(I, comppad, PAD *) /* storage for lexically scoped temporaries */
174 =for apidoc Amn|SV|PL_sv_undef
175 This is the C<undef> SV. Always refer to this as C<&PL_sv_undef>.
177 =for apidoc Amn|SV|PL_sv_no
178 This is the C<false> SV. See C<L</PL_sv_yes>>. Always refer to this as
181 =for apidoc Amn|SV|PL_sv_yes
182 This is the C<true> SV. See C<L</PL_sv_no>>. Always refer to this as
185 =for apidoc Amn|SV|PL_sv_zero
186 This readonly SV has a zero numeric value and a C<"0"> string value. It's
187 similar to C<L</PL_sv_no>> except for its string value. Can be used as a
188 cheap alternative to C<mXPUSHi(0)> for example. Always refer to this as
189 C<&PL_sv_zero>. Introduced in 5.28.
195 PERLVAR(I, sv_yes, SV)
196 PERLVAR(I, sv_undef, SV)
197 PERLVAR(I, sv_no, SV)
198 PERLVAR(I, sv_zero, SV)
200 /* store the immortals as an array to ensure they are contiguous in
201 * memory: makes SvIMMORTAL_INTERP(sv) possible */
202 PERLVARA(I, sv_immortals, 4, SV)
205 PERLVAR(I, padname_undef, PADNAME)
206 PERLVAR(I, padname_const, PADNAME)
207 PERLVAR(I, Sv, SV *) /* used to hold temporary values */
208 PERLVAR(I, parser, yy_parser *) /* current parser state */
210 PERLVAR(I, stashcache, HV *) /* Cache to speed up S_method_common */
214 =for apidoc Amn|STRLEN|PL_na
216 A convenience variable which is typically used with C<SvPV> when one
217 doesn't care about the length of the string. It is usually more efficient
218 to either declare a local variable and use that instead or to use the
224 PERLVAR(I, na, STRLEN) /* for use in SvPV when length is
228 PERLVAR(I, statcache, Stat_t) /* _ */
229 PERLVAR(I, statgv, GV *)
230 PERLVARI(I, statname, SV *, NULL)
233 =for apidoc mn|SV*|PL_rs
235 The input record separator - C<$/> in Perl space.
237 =for apidoc mn|GV*|PL_last_in_gv
239 The GV which was last used for a filehandle input operation. (C<< <FH> >>)
241 =for apidoc mn|GV*|PL_ofsgv
243 The glob containing the output field separator - C<*,> in Perl space.
248 PERLVAR(I, rs, SV *) /* input record separator $/ */
249 PERLVAR(I, last_in_gv, GV *) /* GV used in last <FH> */
250 PERLVAR(I, ofsgv, GV *) /* GV of output field separator *, */
251 PERLVAR(I, defoutgv, GV *) /* default FH for output */
252 PERLVARI(I, chopset, const char *, " \n-") /* $: */
253 PERLVAR(I, formtarget, SV *)
254 PERLVAR(I, bodytarget, SV *)
255 PERLVAR(I, toptarget, SV *)
258 PERLVAR(I, restartop, OP *) /* propagating an error from croak? */
259 PERLVAR(I, restartjmpenv, JMPENV *) /* target frame for longjmp in die */
261 PERLVAR(I, top_env, JMPENV *) /* ptr to current sigjmp environment */
262 PERLVAR(I, start_env, JMPENV) /* empty startup sigjmp environment */
263 PERLVARI(I, errors, SV *, NULL) /* outstanding queued errors */
265 /* statics "owned" by various functions */
266 PERLVAR(I, hv_fetch_ent_mh, HE*) /* owned by hv_fetch_ent() */
268 PERLVAR(I, lastgotoprobe, OP*) /* from pp_ctl.c */
271 PERLVAR(I, sortcop, OP *) /* user defined sort routine */
272 PERLVAR(I, sortstash, HV *) /* which is in some package or other */
273 PERLVAR(I, firstgv, GV *) /* $a */
274 PERLVAR(I, secondgv, GV *) /* $b */
277 PERLVAR(I, efloatbuf, char *)
278 PERLVAR(I, efloatsize, STRLEN)
280 PERLVARI(I, dumpindent, U16, 4) /* number of blanks per dump
284 =for apidoc Amn|U8|PL_exit_flags
286 Contains flags controlling perl's behaviour on exit():
290 =item * C<PERL_EXIT_DESTRUCT_END>
292 If set, END blocks are executed when the interpreter is destroyed.
293 This is normally set by perl itself after the interpreter is
296 =item * C<PERL_EXIT_ABORT>
298 Call C<abort()> on exit. This is used internally by perl itself to
299 abort if exit is called while processing exit.
301 =item * C<PERL_EXIT_WARN>
305 =item * C<PERL_EXIT_EXPECTED>
307 Set by the L<perlfunc/exit> operator.
314 PERLVAR(I, exit_flags, U8) /* was exit() unexpected, etc. */
316 PERLVAR(I, utf8locale, bool) /* utf8 locale detected */
317 PERLVAR(I, in_utf8_CTYPE_locale, bool)
318 PERLVAR(I, in_utf8_COLLATE_locale, bool)
319 PERLVAR(I, in_utf8_turkic_locale, bool)
320 #if defined(USE_ITHREADS) && ! defined(USE_THREAD_SAFE_LOCALE)
321 PERLVARI(I, lc_numeric_mutex_depth, int, 0) /* Emulate general semaphore */
323 PERLVARA(I, locale_utf8ness, 256, char)
325 #ifdef USE_LOCALE_CTYPE
326 PERLVAR(I, warn_locale, SV *)
329 PERLVARA(I, colors,6, char *) /* values from PERL_RE_COLORS env var */
332 =for apidoc Amn|peep_t|PL_peepp
334 Pointer to the per-subroutine peephole optimiser. This is a function
335 that gets called at the end of compilation of a Perl subroutine (or
336 equivalently independent piece of Perl code) to perform fixups of
337 some ops and to perform small-scale optimisations. The function is
338 called once for each subroutine that is compiled, and is passed, as sole
339 parameter, a pointer to the op that is the entry point to the subroutine.
340 It modifies the op tree in place.
342 The peephole optimiser should never be completely replaced. Rather,
343 add code to it by wrapping the existing optimiser. The basic way to do
344 this can be seen in L<perlguts/Compile pass 3: peephole optimization>.
345 If the new code wishes to operate on ops throughout the subroutine's
346 structure, rather than just at the top level, it is likely to be more
347 convenient to wrap the L</PL_rpeepp> hook.
352 PERLVARI(I, peepp, peep_t, Perl_peep)
355 =for apidoc Amn|peep_t|PL_rpeepp
357 Pointer to the recursive peephole optimiser. This is a function
358 that gets called at the end of compilation of a Perl subroutine (or
359 equivalently independent piece of Perl code) to perform fixups of some
360 ops and to perform small-scale optimisations. The function is called
361 once for each chain of ops linked through their C<op_next> fields;
362 it is recursively called to handle each side chain. It is passed, as
363 sole parameter, a pointer to the op that is at the head of the chain.
364 It modifies the op tree in place.
366 The peephole optimiser should never be completely replaced. Rather,
367 add code to it by wrapping the existing optimiser. The basic way to do
368 this can be seen in L<perlguts/Compile pass 3: peephole optimization>.
369 If the new code wishes to operate only on ops at a subroutine's top level,
370 rather than throughout the structure, it is likely to be more convenient
371 to wrap the L</PL_peepp> hook.
376 PERLVARI(I, rpeepp, peep_t, Perl_rpeep)
379 =for apidoc Amn|Perl_ophook_t|PL_opfreehook
381 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.
382 This allows extensions to free any extra attribute they have locally attached to an OP.
383 It is also assured to first fire for the parent OP and then for its kids.
385 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.
390 PERLVARI(I, opfreehook, Perl_ophook_t, 0) /* op_free() hook */
392 PERLVARI(I, watchaddr, char **, 0)
393 PERLVAR(I, watchok, char *)
395 PERLVAR(I, perldb, U32)
397 PERLVAR(I, signals, U32) /* Using which pre-5.8 signals */
399 PERLVAR(I, reentrant_retint, int) /* Integer return value from reentrant functions */
401 /* pseudo environmental stuff */
402 PERLVAR(I, origargc, int)
403 PERLVAR(I, origargv, char **)
404 PERLVAR(I, envgv, GV *)
405 PERLVAR(I, incgv, GV *)
406 PERLVAR(I, hintgv, GV *)
407 PERLVAR(I, origfilename, char *)
408 PERLVARI(I, xsubfilename, const char *, NULL)
409 PERLVAR(I, diehook, SV *)
410 PERLVAR(I, warnhook, SV *)
413 PERLVAR(I, patchlevel, SV *)
414 PERLVAR(I, localpatches, const char * const *)
415 PERLVARI(I, splitstr, const char *, " ")
417 PERLVAR(I, minus_c, bool)
418 PERLVAR(I, minus_n, bool)
419 PERLVAR(I, minus_p, bool)
420 PERLVAR(I, minus_l, bool)
421 PERLVAR(I, minus_a, bool)
422 PERLVAR(I, minus_F, bool)
423 PERLVAR(I, doswitches, bool)
424 PERLVAR(I, minus_E, bool)
426 PERLVAR(I, inplace, char *)
427 PERLVAR(I, e_script, SV *)
429 PERLVAR(I, basetime, Time_t) /* $^T */
431 PERLVARI(I, maxsysfd, I32, MAXSYSFD)
432 /* top fd to pass to subprocesses */
433 PERLVAR(I, statusvalue, I32) /* $? */
435 PERLVAR(I, statusvalue_vms, U32)
437 PERLVAR(I, statusvalue_posix, I32)
440 PERLVARI(I, sig_pending, int, 0) /* Number if highest signal pending */
441 PERLVAR(I, psig_pend, int *) /* per-signal "count" of pending */
443 /* shortcuts to various I/O objects */
444 PERLVAR(I, stdingv, GV *) /* *STDIN */
445 PERLVAR(I, stderrgv, GV *) /* *STDERR */
446 PERLVAR(I, argvgv, GV *) /* *ARGV */
447 PERLVAR(I, argvoutgv, GV *) /* *ARGVOUT */
448 PERLVAR(I, argvout_stack, AV *)
450 /* shortcuts to regexp stuff */
451 PERLVAR(I, replgv, GV *) /* *^R */
453 /* shortcuts to misc objects */
454 PERLVAR(I, errgv, GV *) /* *@ */
456 /* shortcuts to debugging objects */
457 PERLVAR(I, DBgv, GV *) /* *DB::DB */
458 PERLVAR(I, DBline, GV *) /* *DB::line */
461 =for apidoc mn|GV *|PL_DBsub
462 When Perl is run in debugging mode, with the B<-d> switch, this GV contains
463 the SV which holds the name of the sub being debugged. This is the C
464 variable which corresponds to Perl's $DB::sub variable. See
467 =for apidoc mn|SV *|PL_DBsingle
468 When Perl is run in debugging mode, with the B<-d> switch, this SV is a
469 boolean which indicates whether subs are being single-stepped.
470 Single-stepping is automatically turned on after every step. This is the C
471 variable which corresponds to Perl's $DB::single variable. See
474 =for apidoc mn|SV *|PL_DBtrace
475 Trace variable used when Perl is run in debugging mode, with the B<-d>
476 switch. This is the C variable which corresponds to Perl's $DB::trace
477 variable. See C<L</PL_DBsingle>>.
482 PERLVAR(I, DBsub, GV *) /* *DB::sub */
483 PERLVAR(I, DBsingle, SV *) /* $DB::single */
484 PERLVAR(I, DBtrace, SV *) /* $DB::trace */
485 PERLVAR(I, DBsignal, SV *) /* $DB::signal */
486 PERLVAR(I, dbargs, AV *) /* args to call listed by caller function */
488 PERLVARA(I, DBcontrol, DBVARMG_COUNT, IV) /* IV versions of $DB::single, trace, signal */
491 PERLVAR(I, debstash, HV *) /* symbol table for perldb package */
492 PERLVAR(I, globalstash, HV *) /* global keyword overrides imported here */
493 PERLVAR(I, curstname, SV *) /* name of current package */
494 PERLVAR(I, beginav, AV *) /* names of BEGIN subroutines */
495 PERLVAR(I, endav, AV *) /* names of END subroutines */
496 PERLVAR(I, unitcheckav, AV *) /* names of UNITCHECK subroutines */
497 PERLVAR(I, checkav, AV *) /* names of CHECK subroutines */
498 PERLVAR(I, initav, AV *) /* names of INIT subroutines */
500 /* subprocess state */
501 PERLVAR(I, fdpid, AV *) /* keep fd-to-pid mappings for my_popen */
504 PERLVARI(I, op_mask, char *, NULL) /* masked operations for safe evals */
506 /* current interpreter roots */
507 PERLVAR(I, main_cv, CV *)
508 PERLVAR(I, main_root, OP *)
509 PERLVAR(I, main_start, OP *)
510 PERLVAR(I, eval_root, OP *)
511 PERLVAR(I, eval_start, OP *)
513 /* runtime control stuff */
514 PERLVARI(I, curcopdb, COP *, NULL)
516 PERLVAR(I, filemode, int) /* so nextargv() can preserve mode */
517 PERLVAR(I, lastfd, int) /* what to preserve mode on */
518 PERLVAR(I, oldname, char *) /* what to preserve mode on */
519 /* Elements in this array have ';' appended and are injected as a single line
520 into the tokeniser. You can't put any (literal) newlines into any program
521 you stuff in into this array, as the point where it's injected is expecting
522 a single physical line. */
523 PERLVAR(I, preambleav, AV *)
524 PERLVAR(I, mess_sv, SV *)
525 PERLVAR(I, ors_sv, SV *) /* output record separator $\ */
527 /* funky return mechanisms */
528 PERLVAR(I, forkprocess, int) /* so do_open |- can return proc# */
530 /* statics moved here for shared library purposes */
531 PERLVARI(I, gensym, I32, 0) /* next symbol for getsym() to define */
532 PERLVARI(I, cv_has_eval, bool, FALSE) /* PL_compcv includes an entereval or similar */
533 PERLVAR(I, taint_warn, bool) /* taint warns instead of dying */
534 PERLVARI(I, laststype, U16, OP_STAT)
536 PERLVARI(I, laststatval, int, -1)
538 PERLVAR(I, modcount, I32) /* how much op_lvalue()ification in
541 /* interpreter atexit processing */
542 PERLVARI(I, exitlistlen, I32, 0) /* length of same */
543 PERLVARI(I, exitlist, PerlExitListEntry *, NULL)
544 /* list of exit functions */
547 =for apidoc Amn|HV*|PL_modglobal
549 C<PL_modglobal> is a general purpose, interpreter global HV for use by
550 extensions that need to keep information on a per-interpreter basis.
551 In a pinch, it can also be used as a symbol table for extensions
552 to share data among each other. It is a good idea to use keys
553 prefixed by the package name of the extension that owns the data.
558 PERLVAR(I, modglobal, HV *) /* per-interp module data */
560 /* these used to be in global before 5.004_68 */
561 PERLVARI(I, profiledata, U32 *, NULL) /* table of ops, counts */
563 PERLVAR(I, compiling, COP) /* compiling/done executing marker */
565 PERLVAR(I, compcv, CV *) /* currently compiling subroutine */
566 PERLVAR(I, comppad_name, PADNAMELIST *) /* variable names for "my" variables */
567 PERLVAR(I, comppad_name_fill, PADOFFSET)/* last "introduced" variable offset */
568 PERLVAR(I, comppad_name_floor, PADOFFSET)/* start of vars in innermost block */
570 #ifdef HAVE_INTERP_INTERN
571 PERLVAR(I, sys_intern, struct interp_intern)
572 /* platform internals */
575 /* more statics moved here */
576 PERLVAR(I, DBcv, CV *) /* from perl.c */
577 PERLVARI(I, generation, int, 100) /* scan sequence# for OP_AASSIGN
578 compile-time common elem detection */
580 PERLVAR(I, unicode, U32) /* Unicode features: $ENV{PERL_UNICODE} or -C */
582 PERLVARI(I, in_clean_objs,bool, FALSE) /* from sv.c */
583 PERLVARI(I, in_clean_all, bool, FALSE) /* ptrs to freed SVs now legal */
584 PERLVAR(I, nomemok, bool) /* let malloc context handle nomem */
585 PERLVARI(I, savebegin, bool, FALSE) /* save BEGINs for compiler */
588 PERLVAR(I, delaymagic_uid, Uid_t) /* current real user id, only for delaymagic */
589 PERLVAR(I, delaymagic_euid, Uid_t) /* current effective user id, only for delaymagic */
590 PERLVAR(I, delaymagic_gid, Gid_t) /* current real group id, only for delaymagic */
591 PERLVAR(I, delaymagic_egid, Gid_t) /* current effective group id, only for delaymagic */
592 PERLVARI(I, an, U32, 0) /* malloc sequence number */
594 /* Perl_Ibreakable_sub_generation_ptr was too long for VMS, hence "gen" */
595 PERLVARI(I, breakable_sub_gen, U32, 0)
598 /* exercise wrap-around */
599 #define PERL_COP_SEQMAX (U32_MAX-50)
601 #define PERL_COP_SEQMAX 0
603 PERLVARI(I, cop_seqmax, U32, PERL_COP_SEQMAX) /* statement sequence number */
604 #undef PERL_COP_SEQMAX
606 PERLVARI(I, evalseq, U32, 0) /* eval sequence number */
607 PERLVAR(I, origalen, U32)
608 PERLVAR(I, origenviron, char **)
609 #ifdef PERL_USES_PL_PIDSTATUS
610 PERLVAR(I, pidstatus, HV *) /* pid-to-status mappings for waitpid */
612 PERLVAR(I, osname, char *) /* operating system */
614 PERLVAR(I, sighandlerp, Sighandler_t)
615 /* these two are provided only to solve library linkage issues; they
616 * should not be hooked by user code */
617 PERLVAR(I, sighandler1p, Sighandler1_t)
618 PERLVAR(I, sighandler3p, Sighandler3_t)
620 PERLVARA(I, body_roots, PERL_ARENA_ROOTS_SIZE, void*) /* array of body roots */
622 PERLVAR(I, debug, volatile U32) /* flags given to -D switch */
624 PERLVARI(I, padlist_generation, U32, 1) /* id to identify padlist clones */
627 =for apidoc Amn|runops_proc_t|PL_runops
629 See L<perlguts/Pluggable runops>.
634 PERLVARI(I, runops, runops_proc_t, RUNOPS_DEFAULT)
636 PERLVAR(I, subname, SV *) /* name of current subroutine */
638 PERLVAR(I, subline, I32) /* line this subroutine began on */
639 PERLVAR(I, min_intro_pending, PADOFFSET)/* start of vars to introduce */
641 PERLVAR(I, max_intro_pending, PADOFFSET)/* end of vars to introduce */
642 PERLVAR(I, padix, PADOFFSET) /* lowest unused index - 1
643 in current "register" pad */
644 PERLVAR(I, constpadix, PADOFFSET) /* lowest unused for constants */
646 PERLVAR(I, padix_floor, PADOFFSET) /* how low may inner block reset padix */
648 #if defined(USE_POSIX_2008_LOCALE) \
649 && defined(USE_THREAD_SAFE_LOCALE) \
650 && ! defined(HAS_QUERYLOCALE)
652 PERLVARA(I, curlocales, 12, char *)
655 #ifdef USE_LOCALE_COLLATE
657 PERLVAR(I, collation_name, char *) /* Name of current collation */
658 PERLVAR(I, collxfrm_base, Size_t) /* Basic overhead in *xfrm() */
659 PERLVARI(I, collxfrm_mult,Size_t, 2) /* Expansion factor in *xfrm() */
660 PERLVARI(I, collation_ix, U32, 0) /* Collation generation index */
661 PERLVARI(I, strxfrm_NUL_replacement, U8, 0) /* Code point to replace NULs */
662 PERLVARI(I, strxfrm_is_behaved, bool, TRUE)
663 /* Assume until proven otherwise that it works */
664 PERLVARI(I, strxfrm_max_cp, U8, 0) /* Highest collating cp in locale */
665 PERLVARI(I, collation_standard, bool, TRUE)
666 /* Assume simple collation */
667 #endif /* USE_LOCALE_COLLATE */
669 PERLVARI(I, langinfo_buf, char *, NULL)
670 PERLVARI(I, langinfo_bufsize, Size_t, 0)
671 PERLVARI(I, setlocale_buf, char *, NULL)
672 PERLVARI(I, setlocale_bufsize, Size_t, 0)
674 #ifdef PERL_SAWAMPERSAND
675 PERLVAR(I, sawampersand, U8) /* must save all match strings */
678 PERLVAR(I, unsafe, bool)
679 PERLVAR(I, colorset, bool) /* PERL_RE_COLORS env var is in use */
681 /* current phase the interpreter is in
682 for ordering this structure to remove holes, we're assuming that this is 4
684 PERLVARI(I, phase, enum perl_phase, PERL_PHASE_CONSTRUCT)
686 PERLVARI(I, in_load_module, bool, FALSE) /* to prevent recursions in PerlIO_find_layer */
689 =for apidoc Amn|signed char|PL_perl_destruct_level
691 This value may be set when embedding for full cleanup.
701 =item * 2 or greater - full with checks.
705 If C<$ENV{PERL_DESTRUCT_LEVEL}> is set to an integer greater than the
706 value of C<PL_perl_destruct_level> its value is used instead.
710 /* mod_perl is special, and also assigns a meaning -1 */
711 PERLVARI(I, perl_destruct_level, signed char, 0)
713 #ifdef USE_LOCALE_NUMERIC
715 PERLVARI(I, numeric_standard, int, TRUE)
716 /* Assume C locale numerics */
717 PERLVARI(I, numeric_underlying, bool, TRUE)
718 /* Assume underlying locale numerics */
719 PERLVARI(I, numeric_underlying_is_standard, bool, TRUE)
720 PERLVAR(I, numeric_name, char *) /* Name of current numeric locale */
721 PERLVAR(I, numeric_radix_sv, SV *) /* The radix separator if not '.' */
723 # ifdef HAS_POSIX_2008_LOCALE
725 PERLVARI(I, underlying_numeric_obj, locale_t, NULL)
728 #endif /* !USE_LOCALE_NUMERIC */
731 PERLVARI(I, cryptseen, bool, FALSE) /* has fast crypt() been initialized? */
733 /* One byte hole in the interpreter structure. */
736 PERLVAR(I, pad_reset_pending, bool) /* reset pad on next attempted alloc */
737 PERLVAR(I, srand_called, bool)
739 /* Array of signal handlers, indexed by signal number, through which the C
740 signal handler dispatches. */
741 PERLVAR(I, psig_ptr, SV **)
742 /* Array of names of signals, indexed by signal number, for (re)use as the first
743 argument to a signal handler. Only one block of memory is allocated for
744 both psig_name and psig_ptr. */
745 PERLVAR(I, psig_name, SV **)
747 #if defined(PERL_IMPLICIT_SYS)
748 PERLVAR(I, Mem, struct IPerlMem *)
749 PERLVAR(I, MemShared, struct IPerlMem *)
750 PERLVAR(I, MemParse, struct IPerlMem *)
751 PERLVAR(I, Env, struct IPerlEnv *)
752 PERLVAR(I, StdIO, struct IPerlStdIO *)
753 PERLVAR(I, LIO, struct IPerlLIO *)
754 PERLVAR(I, Dir, struct IPerlDir *)
755 PERLVAR(I, Sock, struct IPerlSock *)
756 PERLVAR(I, Proc, struct IPerlProc *)
759 PERLVAR(I, ptr_table, PTR_TBL_t *)
760 PERLVARI(I, beginav_save, AV *, NULL) /* save BEGIN{}s when compiling */
762 PERLVAR(I, body_arenas, void *) /* pointer to list of body-arenas */
765 #if defined(USE_ITHREADS)
766 PERLVAR(I, regex_pad, SV **) /* Shortcut into the array of
768 PERLVAR(I, regex_padav, AV *) /* All regex objects, indexed via the
769 values in op_pmoffset of pmop.
770 Entry 0 is an SV whose PV is a
771 "packed" list of IVs listing
772 the now-free slots in the array */
773 PERLVAR(I, stashpad, HV **) /* for CopSTASH */
774 PERLVARI(I, stashpadmax, PADOFFSET, 64)
775 PERLVARI(I, stashpadix, PADOFFSET, 0)
778 #ifdef USE_REENTRANT_API
779 PERLVAR(I, reentrant_buffer, REENTR *) /* here we store the _r buffers */
782 PERLVAR(I, custom_op_names, HV *) /* Names of user defined ops */
783 PERLVAR(I, custom_op_descs, HV *) /* Descriptions of user defined ops */
786 PERLVARI(I, perlio, PerlIOl *, NULL)
787 PERLVARI(I, known_layers, PerlIO_list_t *, NULL)
788 PERLVARI(I, def_layerlist, PerlIO_list_t *, NULL)
791 PERLVAR(I, sort_RealCmp, SVCOMPARE_t)
793 PERLVARI(I, checkav_save, AV *, NULL) /* save CHECK{}s when compiling */
794 PERLVARI(I, unitcheckav_save, AV *, NULL)
795 /* save UNITCHECK{}s when compiling */
797 PERLVARI(I, clocktick, long, 0) /* this many times() ticks in a second */
799 /* Hooks to shared SVs and locks. */
800 PERLVARI(I, sharehook, share_proc_t, Perl_sv_nosharing)
801 PERLVARI(I, lockhook, share_proc_t, Perl_sv_nosharing)
803 GCC_DIAG_IGNORE(-Wdeprecated-declarations)
805 # define PERL_UNLOCK_HOOK Perl_sv_nosharing
807 /* This reference ensures that the mathoms are linked with perl */
808 # define PERL_UNLOCK_HOOK Perl_sv_nounlocking
810 PERLVARI(I, unlockhook, share_proc_t, PERL_UNLOCK_HOOK)
814 PERLVARI(I, threadhook, thrhook_proc_t, Perl_nothreadhook)
816 /* Can shared object be destroyed */
817 PERLVARI(I, destroyhook, destroyable_proc_t, Perl_sv_destroyable)
820 PERLVARI(I, signalhook, despatch_signals_proc_t, Perl_despatch_signals)
823 PERLVARI(I, isarev, HV *, NULL) /* Reverse map of @ISA dependencies */
825 /* Register of known Method Resolution Orders.
826 What this actually points to is an implementation detail (it may change to
827 a structure incorporating a reference count - use mro_get_from_name to
828 retrieve a C<struct mro_alg *> */
829 PERLVAR(I, registered_mros, HV *)
831 /* Compile-time block start/end hooks */
832 PERLVAR(I, blockhooks, AV *)
834 PERLVAR(I, custom_ops, HV *) /* custom op registrations */
836 PERLVAR(I, Xpv, XPV *) /* (unused) held temporary value */
838 /* name of the scopes we've ENTERed. Only used with -DDEBUGGING, but needs to be
839 present always, as -DDEBUGGING must be binary compatible with non. */
840 PERLVARI(I, scopestack_name, const char * *, NULL)
842 PERLVAR(I, debug_pad, struct perl_debug_pad) /* always needed because of the re extension */
844 /* Hook for File::Glob */
845 PERLVARI(I, globhook, globhook_t, NULL)
847 /* The last unconditional member of the interpreter structure when 5.18.0 was
848 released. The offset of the end of this is baked into a global variable in
849 any shared perl library which will allow a sanity test in future perl
851 #define PERL_LAST_5_18_0_INTERP_MEMBER Iglobhook
853 #ifdef PERL_IMPLICIT_CONTEXT
854 PERLVARI(I, my_cxt_list, void **, NULL) /* per-module array of MY_CXT pointers */
855 PERLVARI(I, my_cxt_size, int, 0) /* size of PL_my_cxt_list */
858 #if defined(PERL_IMPLICIT_CONTEXT) || defined(PERL_DEBUG_READONLY_COW)
859 /* For use with the memory debugging code in util.c. This is used only in
860 * DEBUGGING builds (as long as the relevant structure is defined), but
861 * defining it in non-debug builds too means that we retain binary
862 * compatibility between otherwise-compatible plain and debug builds. */
863 PERLVAR(I, memory_debug_header, struct perl_memory_debug_header)
866 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
867 /* File descriptor to talk to the child which dumps scalars. */
868 PERLVARI(I, dumper_fd, int, -1)
872 #ifdef DEBUG_LEAKING_SCALARS
873 PERLVARI(I, sv_serial, U32, 0) /* SV serial number, used in sv.c */
876 PERLVARA(I, sv_consts, SV_CONSTS_COUNT, SV*) /* constant SVs with precomputed hash value */
878 #ifdef PERL_TRACE_OPS
879 PERLVARA(I, op_exec_cnt, OP_max+2, UV) /* Counts of executed OPs of the given type.
880 If PERL_TRACE_OPS is enabled, we'll dump
881 a summary count of all ops executed in the
882 program at perl_destruct time. For
883 profiling/debugging only. Works only if
884 DEBUGGING is enabled, too. */
887 PERLVAR(I, random_state, PL_RANDOM_STATE_TYPE)
889 PERLVARI(I, dump_re_max_len, STRLEN, 60)
891 /* For internal uses of randomness, this ensures the sequence of
892 * random numbers returned by rand() isn't modified by perl's internal
894 * This is important if the user has called srand() with a seed.
897 PERLVAR(I, internal_random_state, PL_RANDOM_STATE_TYPE)
899 PERLVARA(I, TR_SPECIAL_HANDLING_UTF8, UTF8_MAXBYTES, char)
901 PERLVAR(I, AboveLatin1, SV *)
902 PERLVAR(I, Assigned_invlist, SV *)
903 PERLVAR(I, GCB_invlist, SV *)
904 PERLVAR(I, HasMultiCharFold, SV *)
905 PERLVAR(I, InMultiCharFold, SV *)
906 PERLVAR(I, Latin1, SV *)
907 PERLVAR(I, LB_invlist, SV *)
908 PERLVAR(I, SB_invlist, SV *)
909 PERLVAR(I, SCX_invlist, SV *)
910 PERLVAR(I, UpperLatin1, SV *) /* Code points 128 - 255 */
912 /* List of characters that participate in any fold defined by Unicode */
913 PERLVAR(I, in_some_fold, SV *)
915 PERLVAR(I, utf8_idcont, SV *)
916 PERLVAR(I, utf8_idstart, SV *)
917 PERLVAR(I, utf8_perl_idcont, SV *)
918 PERLVAR(I, utf8_perl_idstart, SV *)
919 PERLVAR(I, utf8_xidcont, SV *)
920 PERLVAR(I, utf8_xidstart, SV *)
921 PERLVAR(I, WB_invlist, SV *)
922 PERLVARA(I, XPosix_ptrs, POSIX_CC_COUNT, SV *)
923 PERLVARA(I, Posix_ptrs, POSIX_CC_COUNT, SV *)
924 PERLVAR(I, utf8_toupper, SV *)
925 PERLVAR(I, utf8_totitle, SV *)
926 PERLVAR(I, utf8_tolower, SV *)
927 PERLVAR(I, utf8_tofold, SV *)
928 PERLVAR(I, utf8_tosimplefold, SV *)
929 PERLVAR(I, utf8_charname_begin, SV *)
930 PERLVAR(I, utf8_charname_continue, SV *)
931 PERLVAR(I, utf8_mark, SV *)
932 PERLVARI(I, InBitmap, SV *, NULL)
933 PERLVAR(I, CCC_non0_non230, SV *)
934 PERLVAR(I, Private_Use, SV *)
936 /* If you are adding a U8 or U16, check to see if there are 'Space' comments
937 * above on where there are gaps which currently will be structure padding. */
939 /* Within a stable branch, new variables must be added to the very end, before
940 * this comment, for binary compatibility (the offsets of the old members must
942 * (Don't forget to add your variable also to perl_clone()!)
943 * XSUB.h provides wrapper functions via perlapi.h that make this
944 * irrelevant, but not all code may be expected to #include XSUB.h.