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a0d0e21e 1/* op.h
79072805 2 *
1129b882
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3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
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5 *
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.
8 *
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9 */
10
11/*
12 * The fields of BASEOP are:
13 * op_next Pointer to next ppcode to execute after this one.
14 * (Top level pre-grafted op points to first op,
15 * but this is replaced when op is grafted in, when
16 * this op will point to the real next op, and the new
17 * parent takes over role of remembering starting op.)
18 * op_ppaddr Pointer to current ppcode's function.
19 * op_type The type of the operation.
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20 * op_opt Whether or not the op has been optimised by the
21 * peephole optimiser.
8be227ab 22 * op_slabbed allocated via opslab
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23 * op_static tell op_free() to skip PerlMemShared_free(), when
24 * !op_slabbed.
bb38a9e0 25 * op_savefree on savestack via SAVEFREEOP
90840c5d 26 * op_spare Three spare bits
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27 * op_flags Flags common to all operations. See OPf_* below.
28 * op_private Flags peculiar to a particular operation (BUT,
29 * by default, set to the number of children until
30 * the operation is privatized by a check routine,
31 * which may or may not check number of children).
32 */
1850c8f9 33#include "op_reg_common.h"
79072805 34
79072805 35#define OPCODE U16
79072805 36
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37#ifdef PERL_MAD
38# define MADPROP_IN_BASEOP MADPROP* op_madprop;
39#else
40# define MADPROP_IN_BASEOP
41#endif
42
61a59f30 43typedef PERL_BITFIELD16 Optype;
0053d415 44
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45#ifdef BASEOP_DEFINITION
46#define BASEOP BASEOP_DEFINITION
47#else
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48#define BASEOP \
49 OP* op_next; \
50 OP* op_sibling; \
16c91539 51 OP* (*op_ppaddr)(pTHX); \
598921a7 52 MADPROP_IN_BASEOP \
79072805 53 PADOFFSET op_targ; \
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54 PERL_BITFIELD16 op_type:9; \
55 PERL_BITFIELD16 op_opt:1; \
8be227ab 56 PERL_BITFIELD16 op_slabbed:1; \
bb38a9e0 57 PERL_BITFIELD16 op_savefree:1; \
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58 PERL_BITFIELD16 op_static:1; \
59 PERL_BITFIELD16 op_spare:3; \
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60 U8 op_flags; \
61 U8 op_private;
0f4eea8f 62#endif
79072805 63
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64/* If op_type:9 is changed to :10, also change PUSHEVAL in cop.h.
65 Also, if the type of op_type is ever changed (e.g. to PERL_BITFIELD32)
66 then all the other bit-fields before/after it should change their
67 types too to let VC pack them into the same 4 byte integer.*/
17347a51 68
fe615074 69/* for efficiency, requires OPf_WANT_VOID == G_VOID etc */
54310121 70#define OP_GIMME(op,dfl) \
fe615074 71 (((op)->op_flags & OPf_WANT) ? ((op)->op_flags & OPf_WANT) : dfl)
54310121 72
2f8edad0 73#define OP_GIMME_REVERSE(flags) ((flags) & G_WANT)
4f911530 74
954c1994 75/*
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76=head1 "Gimme" Values
77
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78=for apidoc Amn|U32|GIMME_V
79The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
91e74348 80C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
683d9ad1 81respectively. See L<perlcall> for a usage example.
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82
83=for apidoc Amn|U32|GIMME
84A backward-compatible version of C<GIMME_V> which can only return
85C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
86Deprecated. Use C<GIMME_V> instead.
87
88=cut
89*/
90
533c011a 91#define GIMME_V OP_GIMME(PL_op, block_gimme())
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92
93/* Public flags */
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94
95#define OPf_WANT 3 /* Mask for "want" bits: */
96#define OPf_WANT_VOID 1 /* Want nothing */
97#define OPf_WANT_SCALAR 2 /* Want single value */
98#define OPf_WANT_LIST 3 /* Want list of any length */
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99#define OPf_KIDS 4 /* There is a firstborn child. */
100#define OPf_PARENS 8 /* This operator was parenthesized. */
463ee0b2 101 /* (Or block needs explicit scope entry.) */
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102#define OPf_REF 16 /* Certified reference. */
103 /* (Return container, not containee). */
104#define OPf_MOD 32 /* Will modify (lvalue). */
105#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
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106#define OPf_SPECIAL 128 /* Do something weird for this op: */
107 /* On local LVAL, don't init local value. */
108 /* On OP_SORT, subroutine is inlined. */
109 /* On OP_NOT, inversion was implicit. */
a0d0e21e 110 /* On OP_LEAVE, don't restore curpm. */
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111 /* On truncate, we truncate filehandle */
112 /* On control verbs, we saw no label */
113 /* On flipflop, we saw ... instead of .. */
114 /* On UNOPs, saw bare parens, e.g. eof(). */
a0d0e21e 115 /* On OP_ENTERSUB || OP_NULL, saw a "do". */
afebc493 116 /* On OP_EXISTS, treat av as av, not avhv. */
f2ec2afd 117 /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
dbc200c5 118 /* On pushre, rx is used as part of split, e.g. split " " */
497711e7 119 /* On regcomp, "use re 'eval'" was in scope */
7c6fadd6 120 /* On OP_READLINE, was <$filehandle> */
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121 /* On RV2[ACGHS]V, don't create GV--in
122 defined()*/
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123 /* On OP_DBSTATE, indicates breakpoint
124 * (runtime property) */
6b514a0d 125 /* On OP_REQUIRE, was seen as CORE::require */
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126 /* On OP_(ENTER|LEAVE)WHEN, there's
127 no condition */
0d863452 128 /* On OP_SMARTMATCH, an implicit smartmatch */
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129 /* On OP_ANONHASH and OP_ANONLIST, create a
130 reference to the new anon hash or array */
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131 /* On OP_HELEM and OP_HSLICE, localization will be followed
132 by assignment, so do not wipe the target if it is special
133 (e.g. a glob or a magic SV) */
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134 /* On OP_MATCH, OP_SUBST & OP_TRANS, the
135 operand of a logical or conditional
136 that was optimised away, so it should
137 not be bound via =~ */
6b7c6d95 138 /* On OP_CONST, from a constant CV */
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FC
139 /* On OP_GLOB, two meanings:
140 - Before ck_glob, called as CORE::glob
141 - After ck_glob, use Perl glob function
142 */
d5524600 143 /* On OP_PADRANGE, push @_ */
79072805 144
54310121 145/* old names; don't use in new code, but don't break them, either */
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146#define OPf_LIST OPf_WANT_LIST
147#define OPf_KNOW OPf_WANT
954c1994 148
54310121 149#define GIMME \
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150 (PL_op->op_flags & OPf_WANT \
151 ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
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152 ? G_ARRAY \
153 : G_SCALAR) \
154 : dowantarray())
54310121 155
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156/* Lower bits of op_private often carry the number of arguments, as
157 * set by newBINOP, newUNOP and ck_fun */
158
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159/* NOTE: OP_NEXTSTATE and OP_DBSTATE (i.e. COPs) carry NATIVE_HINTS
160 * in op_private */
d41ff1b8 161
a0d0e21e 162/* Private for lvalues */
cd06dffe 163#define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */
a0d0e21e 164
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165/* Private for OPs with TARGLEX */
166 /* (lower bits may carry MAXARG) */
167#define OPpTARGET_MY 16 /* Target is PADMY. */
168
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169/* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */
170#define OPpREFCOUNTED 64 /* op_targ carries a refcount */
171
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172/* Private for OP_AASSIGN */
173#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
174
175/* Private for OP_SASSIGN */
176#define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
e26df76a 177#define OPpASSIGN_CV_TO_GV 128 /* Possible optimisation for constants. */
79072805 178
c657ea3a 179/* Private for OP_MATCH and OP_SUBST{,CONT} */
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180#define OPpRUNTIME 64 /* Pattern coming in on the stack */
181
79072805 182/* Private for OP_TRANS */
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183#define OPpTRANS_FROM_UTF 1
184#define OPpTRANS_TO_UTF 2
383e7cdd 185#define OPpTRANS_IDENTICAL 4 /* right side is same as left */
4757a243 186#define OPpTRANS_SQUASH 8
59f00321 187 /* 16 is used for OPpTARGET_MY */
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188#define OPpTRANS_COMPLEMENT 32
189#define OPpTRANS_GROWS 64
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190#define OPpTRANS_DELETE 128
191#define OPpTRANS_ALL (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF|OPpTRANS_IDENTICAL|OPpTRANS_SQUASH|OPpTRANS_COMPLEMENT|OPpTRANS_GROWS|OPpTRANS_DELETE)
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192
193/* Private for OP_REPEAT */
a0d0e21e 194#define OPpREPEAT_DOLIST 64 /* List replication. */
79072805 195
cf2dc985 196/* Private for OP_RV2GV, OP_RV2SV, OP_AELEM, OP_HELEM, OP_PADSV */
314d4778 197#define OPpDEREF (32|64) /* autovivify: Want ref to something: */
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PP
198#define OPpDEREF_AV 32 /* Want ref to AV. */
199#define OPpDEREF_HV 64 /* Want ref to HV. */
200#define OPpDEREF_SV (32|64) /* Want ref to SV. */
777d9014 201
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202 /* OP_ENTERSUB only */
203#define OPpENTERSUB_DB 16 /* Debug subroutine. */
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204#define OPpENTERSUB_HASTARG 4 /* Called from OP tree. */
205#define OPpENTERSUB_INARGS 1 /* Lval used as arg to a sub. */
0e9700df 206/* used by OPpDEREF (32|64) */
81db4439 207/* used by HINT_STRICT_REFS 2 */
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208 /* Mask for OP_ENTERSUB flags, the absence of which must be propagated
209 in dynamic context */
210#define OPpENTERSUB_LVAL_MASK (OPpLVAL_INTRO|OPpENTERSUB_INARGS)
211
d4ddbae8 212 /* OP_RV2CV only */
68dc0745 213#define OPpENTERSUB_AMPER 8 /* Used & form to call. */
9675f7ac 214#define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */
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215#define OPpMAY_RETURN_CONSTANT 1 /* If a constant sub, return the constant */
216
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217 /* OP_GV only */
218#define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */
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219 /* OP_?ELEM only */
220#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
8dc99089 221 /* OP_RV2[SAH]V, OP_GVSV, OP_ENTERITER only */
78f9721b 222#define OPpOUR_INTRO 16 /* Variable was in an our() */
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FC
223 /* OP_RV2[AGH]V, OP_PAD[AH]V, OP_[AH]ELEM, OP_[AH]SLICE OP_AV2ARYLEN,
224 OP_R?KEYS, OP_SUBSTR, OP_POS, OP_VEC */
78f9721b 225#define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */
6ea72b3a 226 /* OP_RV2HV and OP_PADHV */
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FC
227#define OPpTRUEBOOL 32 /* %hash in (%hash || $foo) in
228 void context */
adc42c31 229#define OPpMAYBE_TRUEBOOL 64 /* %hash in (%hash || $foo) where
6ea72b3a 230 cx is not known till run time */
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231
232 /* OP_SUBSTR only */
233#define OPpSUBSTR_REPL_FIRST 16 /* 1st arg is replacement string */
234
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235 /* OP_PADSV only */
236#define OPpPAD_STATE 16 /* is a "state" pad */
192587c2 237 /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */
79072805 238
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239 /* OP_PADRANGE only */
240 /* bit 7 is OPpLVAL_INTRO */
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241#define OPpPADRANGE_COUNTMASK 127 /* bits 6..0 hold target range, */
242#define OPpPADRANGE_COUNTSHIFT 7 /* 7 bits in total */
a7fd8ef6 243
e26df76a 244 /* OP_RV2GV only */
cb0d96b9 245#define OPpDONT_INIT_GV 4 /* Call gv_fetchpv with GV_NOINIT */
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NC
246/* (Therefore will return whatever is currently in the symbol table, not
247 guaranteed to be a PVGV) */
8dc99089 248#define OPpALLOW_FAKE 16 /* OK to return fake glob */
e26df76a 249
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250/* Private for OP_ENTERITER and OP_ITER */
251#define OPpITER_REVERSED 4 /* for (reverse ...) */
0d863452 252#define OPpITER_DEF 8 /* for $_ or for my $_ */
ef3e5ea9 253
79072805 254/* Private for OP_CONST */
468aa647 255#define OPpCONST_NOVER 2 /* no 6; */
e7fec78e 256#define OPpCONST_SHORTCIRCUIT 4 /* eg the constant 5 in (5 || foo) */
486ec47a 257#define OPpCONST_STRICT 8 /* bareword subject to strict 'subs' */
748a9306 258#define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
a0d0e21e 259#define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
cc2ebcd7 260#define OPpCONST_FOLDED 128 /* Result of constant folding */
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261
262/* Private for OP_FLIP/FLOP */
a0d0e21e 263#define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
79072805 264
ed6116ce 265/* Private for OP_LIST */
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266#define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
267
5f05dabc 268/* Private for OP_DELETE */
54310121 269#define OPpSLICE 64 /* Operating on a list of keys */
7332a6c4 270/* Also OPpLVAL_INTRO (128) */
5f05dabc 271
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272/* Private for OP_EXISTS */
273#define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */
274
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275/* Private for OP_SORT */
276#define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */
277#define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */
eb209983 278#define OPpSORT_REVERSE 4 /* Reversed sort */
fe1bc4cf 279#define OPpSORT_INPLACE 8 /* sort in-place; eg @a = sort @a */
eb209983 280#define OPpSORT_DESCEND 16 /* Descending sort */
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281#define OPpSORT_QSORT 32 /* Use quicksort (not mergesort) */
282#define OPpSORT_STABLE 64 /* Use a stable algorithm */
283
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284/* Private for OP_REVERSE */
285#define OPpREVERSE_INPLACE 8 /* reverse in-place (@a = reverse @a) */
286
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287/* Private for OP_OPEN and OP_BACKTICK */
288#define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */
289#define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */
290#define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */
291#define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */
292
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293/* Private for OP_EXIT, HUSH also for OP_DIE */
294#define OPpHUSH_VMSISH 64 /* hush DCL exit msg vmsish mode*/
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295#define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/
296
0d863452 297/* Private for OP_FTXXX */
1af34c76 298#define OPpFT_ACCESS 2 /* use filetest 'access' */
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299#define OPpFT_STACKED 4 /* stacked filetest, as "-f" in "-f -x $f" */
300#define OPpFT_STACKING 8 /* stacking filetest, as "-x" in "-f -x $f" */
8db8f6b6 301#define OPpFT_AFTER_t 16 /* previous op was -t */
1af34c76 302
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303/* Private for OP_(MAP|GREP)(WHILE|START) */
304#define OPpGREP_LEX 2 /* iterate over lexical $_ */
305
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306/* Private for OP_ENTEREVAL */
307#define OPpEVAL_HAS_HH 2 /* Does it have a copy of %^H */
802a15e9 308#define OPpEVAL_UNICODE 4
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FC
309#define OPpEVAL_BYTES 8
310#define OPpEVAL_COPHH 16 /* Construct %^H from cop hints */
a1941760 311#define OPpEVAL_RE_REPARSING 32 /* eval_sv(..., G_RE_REPARSING) */
0d863452 312
84ed0108 313/* Private for OP_CALLER, OP_WANTARRAY and OP_RUNCV */
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314#define OPpOFFBYONE 128 /* Treat caller(1) as caller(2) */
315
e664e0a4 316/* Private for OP_COREARGS */
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317/* These must not conflict with OPpDONT_INIT_GV or OPpALLOW_FAKE.
318 See pp.c:S_rv2gv. */
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FC
319#define OPpCOREARGS_DEREF1 1 /* Arg 1 is a handle constructor */
320#define OPpCOREARGS_DEREF2 2 /* Arg 2 is a handle constructor */
cb85b2db 321#define OPpCOREARGS_SCALARMOD 64 /* \$ rather than \[$@%*] */
0b19d81a 322#define OPpCOREARGS_PUSHMARK 128 /* Call pp_pushmark */
e664e0a4 323
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324/* Private for OP_(LAST|REDO|NEXT|GOTO|DUMP) */
325#define OPpPV_IS_UTF8 128 /* label is in UTF8 */
326
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327struct op {
328 BASEOP
329};
330
331struct unop {
332 BASEOP
333 OP * op_first;
334};
335
336struct binop {
337 BASEOP
338 OP * op_first;
339 OP * op_last;
340};
341
342struct logop {
343 BASEOP
344 OP * op_first;
345 OP * op_other;
346};
347
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348struct listop {
349 BASEOP
350 OP * op_first;
351 OP * op_last;
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352};
353
354struct pmop {
355 BASEOP
356 OP * op_first;
357 OP * op_last;
1fcf4c12 358#ifdef USE_ITHREADS
fd1bc7eb 359 IV op_pmoffset;
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AB
360#else
361 REGEXP * op_pmregexp; /* compiled expression */
362#endif
69bdead3 363 U32 op_pmflags;
29f2e912 364 union {
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NC
365 OP * op_pmreplroot; /* For OP_SUBST */
366#ifdef USE_ITHREADS
367 PADOFFSET op_pmtargetoff; /* For OP_PUSHRE */
368#else
369 GV * op_pmtargetgv;
370#endif
371 } op_pmreplrootu;
372 union {
29f2e912 373 OP * op_pmreplstart; /* Only used in OP_SUBST */
cb55de95 374#ifdef USE_ITHREADS
23083432 375 PADOFFSET op_pmstashoff; /* Only used in OP_MATCH, with PMf_ONCE set */
cb55de95 376#else
29f2e912 377 HV * op_pmstash;
cb55de95 378#endif
29f2e912 379 } op_pmstashstartu;
68e2671b 380 OP * op_code_list; /* list of (?{}) code blocks */
79072805 381};
a0d0e21e 382
1fcf4c12 383#ifdef USE_ITHREADS
14a49a24
NC
384#define PM_GETRE(o) (SvTYPE(PL_regex_pad[(o)->op_pmoffset]) == SVt_REGEXP \
385 ? (REGEXP*)(PL_regex_pad[(o)->op_pmoffset]) : NULL)
ede1273d
NC
386/* The assignment is just to enforce type safety (or at least get a warning).
387 */
14a49a24
NC
388/* With first class regexps not via a reference one needs to assign
389 &PL_sv_undef under ithreads. (This would probably work unthreaded, but NULL
390 is cheaper. I guess we could allow NULL, but the check above would get
391 more complex, and we'd have an AV with (SV*)NULL in it, which feels bad */
392/* BEWARE - something that calls this macro passes (r) which has a side
393 effect. */
ede1273d 394#define PM_SETRE(o,r) STMT_START { \
b1bc3f34 395 REGEXP *const _pm_setre = (r); \
7948fc08 396 assert(_pm_setre); \
b1bc3f34 397 PL_regex_pad[(o)->op_pmoffset] = MUTABLE_SV(_pm_setre); \
ede1273d 398 } STMT_END
1fcf4c12 399#else
b9ed2502
AB
400#define PM_GETRE(o) ((o)->op_pmregexp)
401#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
1fcf4c12 402#endif
4825b64b 403
beae72ee
KW
404/* Leave some space, so future bit allocations can go either in the shared or
405 * unshared area without affecting binary compatibility */
df7a8460 406#define PMf_BASE_SHIFT (_RXf_PMf_SHIFT_NEXT+6)
f4a4cecb 407
ef07e810 408/* 'use re "taint"' in scope: taint $1 etc. if target tainted */
1ad4ec54 409#define PMf_RETAINT (1<<(PMf_BASE_SHIFT+0))
c737faaf 410
c0f1c194
KW
411/* match successfully only once per reset, with related flag RXf_USED in
412 * re->extflags holding state. This is used only for ?? matches, and only on
413 * OP_MATCH and OP_QR */
1ad4ec54 414#define PMf_ONCE (1<<(PMf_BASE_SHIFT+1))
1850c8f9 415
d234778b 416/* PMf_ONCE, i.e. ?pat?, has matched successfully. Not used under threading. */
1ad4ec54 417#define PMf_USED (1<<(PMf_BASE_SHIFT+3))
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KW
418
419/* subst replacement is constant */
1ad4ec54 420#define PMf_CONST (1<<(PMf_BASE_SHIFT+4))
c737faaf 421
1850c8f9 422/* keep 1st runtime pattern forever */
1ad4ec54 423#define PMf_KEEP (1<<(PMf_BASE_SHIFT+5))
4da3eb8b 424
1ad4ec54 425#define PMf_GLOBAL (1<<(PMf_BASE_SHIFT+6)) /* pattern had a g modifier */
c737faaf 426
1850c8f9 427/* don't reset pos() if //g fails */
1ad4ec54 428#define PMf_CONTINUE (1<<(PMf_BASE_SHIFT+7))
1850c8f9
KW
429
430/* evaluating replacement as expr */
1ad4ec54 431#define PMf_EVAL (1<<(PMf_BASE_SHIFT+8))
c0f1c194
KW
432
433/* Return substituted string instead of modifying it. */
1ad4ec54 434#define PMf_NONDESTRUCT (1<<(PMf_BASE_SHIFT+9))
e357fc67 435
d63c20f2
DM
436/* the pattern has a CV attached (currently only under qr/...(?{}).../) */
437#define PMf_HAS_CV (1<<(PMf_BASE_SHIFT+10))
438
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DM
439/* op_code_list is private; don't free it etc. It may well point to
440 * code within another sub, with different pad etc */
441#define PMf_CODELIST_PRIVATE (1<<(PMf_BASE_SHIFT+11))
442
2a92a973
DM
443/* the PMOP is a QR (we should be able to detect that from the op type,
444 * but the regex compilation API passes just the pm flags, not the op
445 * itself */
446#define PMf_IS_QR (1<<(PMf_BASE_SHIFT+12))
a5ae69f0 447#define PMf_USE_RE_EVAL (1<<(PMf_BASE_SHIFT+13)) /* use re'eval' in scope */
2a92a973 448
a5ae69f0 449#if PMf_BASE_SHIFT+13 > 31
32cdcf9d 450# error Too many PMf_ bits used. See above and regnodes.h for any spare in middle
1850c8f9 451#endif
79072805 452
cb55de95 453#ifdef USE_ITHREADS
05ec9bb3 454
23083432
FC
455# define PmopSTASH(o) ((o)->op_pmflags & PMf_ONCE \
456 ? PL_stashpad[(o)->op_pmstashstartu.op_pmstashoff] \
457 : NULL)
458# define PmopSTASH_set(o,hv) \
459 (assert_((o)->op_pmflags & PMf_ONCE) \
460 (o)->op_pmstashstartu.op_pmstashoff = \
01f44973 461 (hv) ? alloccopstash(hv) : 0)
cb55de95 462#else
29f2e912
NC
463# define PmopSTASH(o) \
464 (((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstash : NULL)
465# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
466# define PmopSTASH_set(o,hv) ({ \
467 assert((o)->op_pmflags & PMf_ONCE); \
468 ((o)->op_pmstashstartu.op_pmstash = (hv)); \
469 })
470# else
471# define PmopSTASH_set(o,hv) ((o)->op_pmstashstartu.op_pmstash = (hv))
472# endif
cb55de95 473#endif
23083432
FC
474#define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME_get(PmopSTASH(o)) : NULL)
475 /* op_pmstashstartu.op_pmstash is not refcounted */
476#define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
cb55de95 477
79072805
LW
478struct svop {
479 BASEOP
480 SV * op_sv;
481};
482
7934575e 483struct padop {
79072805 484 BASEOP
7934575e 485 PADOFFSET op_padix;
79072805
LW
486};
487
488struct pvop {
489 BASEOP
490 char * op_pv;
491};
492
79072805
LW
493struct loop {
494 BASEOP
495 OP * op_first;
496 OP * op_last;
79072805
LW
497 OP * op_redoop;
498 OP * op_nextop;
499 OP * op_lastop;
500};
501
350de78d
GS
502#define cUNOPx(o) ((UNOP*)o)
503#define cBINOPx(o) ((BINOP*)o)
504#define cLISTOPx(o) ((LISTOP*)o)
505#define cLOGOPx(o) ((LOGOP*)o)
506#define cPMOPx(o) ((PMOP*)o)
507#define cSVOPx(o) ((SVOP*)o)
508#define cPADOPx(o) ((PADOP*)o)
509#define cPVOPx(o) ((PVOP*)o)
510#define cCOPx(o) ((COP*)o)
511#define cLOOPx(o) ((LOOP*)o)
512
513#define cUNOP cUNOPx(PL_op)
514#define cBINOP cBINOPx(PL_op)
515#define cLISTOP cLISTOPx(PL_op)
516#define cLOGOP cLOGOPx(PL_op)
517#define cPMOP cPMOPx(PL_op)
518#define cSVOP cSVOPx(PL_op)
519#define cPADOP cPADOPx(PL_op)
520#define cPVOP cPVOPx(PL_op)
521#define cCOP cCOPx(PL_op)
522#define cLOOP cLOOPx(PL_op)
523
524#define cUNOPo cUNOPx(o)
525#define cBINOPo cBINOPx(o)
526#define cLISTOPo cLISTOPx(o)
527#define cLOGOPo cLOGOPx(o)
528#define cPMOPo cPMOPx(o)
529#define cSVOPo cSVOPx(o)
530#define cPADOPo cPADOPx(o)
531#define cPVOPo cPVOPx(o)
532#define cCOPo cCOPx(o)
533#define cLOOPo cLOOPx(o)
534
535#define kUNOP cUNOPx(kid)
536#define kBINOP cBINOPx(kid)
537#define kLISTOP cLISTOPx(kid)
538#define kLOGOP cLOGOPx(kid)
539#define kPMOP cPMOPx(kid)
540#define kSVOP cSVOPx(kid)
541#define kPADOP cPADOPx(kid)
542#define kPVOP cPVOPx(kid)
543#define kCOP cCOPx(kid)
544#define kLOOP cLOOPx(kid)
545
546
547#ifdef USE_ITHREADS
dd2155a4 548# define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix))
cecf5685
NC
549# define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && isGV_with_GP(v) \
550 && GvIN_PAD(v))
f5a0fd1e
FC
551# define IS_PADCONST(v) \
552 (v && (SvREADONLY(v) || (SvIsCOW(v) && !SvLEN(v))))
7766f137 553# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
dd2155a4 554 ? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
638eceb6 555# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
dd2155a4 556 ? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
350de78d 557#else
638eceb6 558# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
743e66e6 559# define IS_PADGV(v) FALSE
7766f137
GS
560# define IS_PADCONST(v) FALSE
561# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
638eceb6 562# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
350de78d 563#endif
79072805 564
638eceb6
GS
565#define cGVOP_gv cGVOPx_gv(PL_op)
566#define cGVOPo_gv cGVOPx_gv(o)
567#define kGVOP_gv cGVOPx_gv(kid)
568#define cSVOP_sv cSVOPx_sv(PL_op)
569#define cSVOPo_sv cSVOPx_sv(o)
570#define kSVOP_sv cSVOPx_sv(kid)
7766f137 571
bcabcc50
NC
572#ifndef PERL_CORE
573# define Nullop ((OP*)NULL)
574#endif
79072805 575
cee4176c 576/* Lowest byte of PL_opargs */
a0d0e21e
LW
577#define OA_MARK 1
578#define OA_FOLDCONST 2
579#define OA_RETSCALAR 4
580#define OA_TARGET 8
903fd87c 581#define OA_TARGLEX 16
a0d0e21e
LW
582#define OA_OTHERINT 32
583#define OA_DANGEROUS 64
584#define OA_DEFGV 128
585
db173bac 586/* The next 4 bits encode op class information */
903fd87c 587#define OCSHIFT 8
b162f9ea
IZ
588
589#define OA_CLASS_MASK (15 << OCSHIFT)
590
591#define OA_BASEOP (0 << OCSHIFT)
592#define OA_UNOP (1 << OCSHIFT)
593#define OA_BINOP (2 << OCSHIFT)
594#define OA_LOGOP (3 << OCSHIFT)
1a67a97c
SM
595#define OA_LISTOP (4 << OCSHIFT)
596#define OA_PMOP (5 << OCSHIFT)
597#define OA_SVOP (6 << OCSHIFT)
7934575e 598#define OA_PADOP (7 << OCSHIFT)
1a67a97c
SM
599#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
600#define OA_LOOP (9 << OCSHIFT)
601#define OA_COP (10 << OCSHIFT)
602#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
603#define OA_FILESTATOP (12 << OCSHIFT)
604#define OA_LOOPEXOP (13 << OCSHIFT)
b162f9ea 605
903fd87c 606#define OASHIFT 12
a0d0e21e 607
4369b173 608/* Remaining nybbles of PL_opargs */
a0d0e21e
LW
609#define OA_SCALAR 1
610#define OA_LIST 2
611#define OA_AVREF 3
612#define OA_HVREF 4
613#define OA_CVREF 5
614#define OA_FILEREF 6
615#define OA_SCALARREF 7
616#define OA_OPTIONAL 8
617
d3c72c2a
DM
618/* Op_REFCNT is a reference count at the head of each op tree: needed
619 * since the tree is shared between threads, and between cloned closure
620 * copies in the same thread. OP_REFCNT_LOCK/UNLOCK is used when modifying
621 * this count.
622 * The same mutex is used to protect the refcounts of the reg_trie_data
623 * and reg_ac_data structures, which are shared between duplicated
624 * regexes.
625 */
626
534825c4
GS
627#ifdef USE_ITHREADS
628# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
4026c95a
SH
629# ifdef PERL_CORE
630# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
631# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
632# else
633# define OP_REFCNT_LOCK op_refcnt_lock()
634# define OP_REFCNT_UNLOCK op_refcnt_unlock()
635# endif
534825c4 636# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
534825c4
GS
637#else
638# define OP_REFCNT_INIT NOOP
639# define OP_REFCNT_LOCK NOOP
640# define OP_REFCNT_UNLOCK NOOP
641# define OP_REFCNT_TERM NOOP
534825c4 642#endif
e4783991 643
282f25c9 644#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
fc97af9c
NC
645#ifdef PERL_DEBUG_READONLY_OPS
646# define OpREFCNT_inc(o) Perl_op_refcnt_inc(aTHX_ o)
647# define OpREFCNT_dec(o) Perl_op_refcnt_dec(aTHX_ o)
648#else
649# define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : NULL)
650# define OpREFCNT_dec(o) (--(o)->op_targ)
651#endif
282f25c9 652
e4783991 653/* flags used by Perl_load_module() */
ec6d81ab
RGS
654#define PERL_LOADMOD_DENY 0x1 /* no Module */
655#define PERL_LOADMOD_NOIMPORT 0x2 /* use Module () */
656#define PERL_LOADMOD_IMPORT_OPS 0x4 /* use Module (...) */
e5dd39fc 657
a0c21aa1 658#if defined(PERL_IN_PERLY_C) || defined(PERL_IN_OP_C)
e4c5ccf3 659#define ref(o, type) doref(o, type, TRUE)
a0c21aa1 660#endif
e4c5ccf3 661
5983a79d
BM
662/*
663=head1 Optree Manipulation Functions
664
665=for apidoc Am|OP*|LINKLIST|OP *o
666Given the root of an optree, link the tree in execution order using the
667C<op_next> pointers and return the first op executed. If this has
668already been done, it will not be redone, and C<< o->op_next >> will be
669returned. If C<< o->op_next >> is not already set, I<o> should be at
670least an C<UNOP>.
671
672=cut
673*/
674
675#define LINKLIST(o) ((o)->op_next ? (o)->op_next : op_linklist((OP*)o))
676
33f36c71
NC
677/* no longer used anywhere in core */
678#ifndef PERL_CORE
46471bde 679#define cv_ckproto(cv, gv, p) \
f717afa7 680 cv_ckproto_len_flags((cv), (gv), (p), (p) ? strlen(p) : 0, 0)
33f36c71
NC
681#endif
682
7d0905b9
NC
683#ifdef PERL_CORE
684# define my(o) my_attrs((o), NULL)
685#endif
686
e5dd39fc 687#ifdef USE_REENTRANT_API
10bc17b6 688#include "reentr.h"
e5dd39fc
AB
689#endif
690
c7e45529 691#define NewOp(m,var,c,type) \
e91d68d5 692 (var = (type *) Perl_Slab_Alloc(aTHX_ c*sizeof(type)))
c7e45529 693#define NewOpSz(m,var,size) \
e91d68d5 694 (var = (OP *) Perl_Slab_Alloc(aTHX_ size))
c7e45529 695#define FreeOp(p) Perl_Slab_Free(aTHX_ p)
8be227ab
FC
696
697/*
698 * The per-CV op slabs consist of a header (the opslab struct) and a bunch
699 * of space for allocating op slots, each of which consists of two pointers
700 * followed by an op. The first pointer points to the next op slot. The
701 * second points to the slab. At the end of the slab is a null pointer,
702 * so that slot->opslot_next - slot can be used to determine the size
703 * of the op.
704 *
705 * Each CV can have multiple slabs; opslab_next points to the next slab, to
706 * form a chain. All bookkeeping is done on the first slab, which is where
707 * all the op slots point.
708 *
709 * Freed ops are marked as freed and attached to the freed chain
710 * via op_next pointers.
711 *
712 * When there is more than one slab, the second slab in the slab chain is
713 * assumed to be the one with free space available. It is used when allo-
714 * cating an op if there are no freed ops available or big enough.
715 */
716
7aef8e5b 717#ifdef PERL_CORE
8be227ab
FC
718struct opslot {
719 /* keep opslot_next first */
720 OPSLOT * opslot_next; /* next slot */
721 OPSLAB * opslot_slab; /* owner */
722 OP opslot_op; /* the op itself */
723};
724
725struct opslab {
726 OPSLOT * opslab_first; /* first op in this slab */
727 OPSLAB * opslab_next; /* next slab */
728 OP * opslab_freed; /* chain of freed ops */
729 size_t opslab_refcnt; /* number of ops */
3107b51f
FC
730# ifdef PERL_DEBUG_READONLY_OPS
731 U16 opslab_size; /* size of slab in pointers */
732 bool opslab_readonly;
733# endif
8be227ab
FC
734 OPSLOT opslab_slots; /* slots begin here */
735};
736
737# define OPSLOT_HEADER STRUCT_OFFSET(OPSLOT, opslot_op)
738# define OPSLOT_HEADER_P (OPSLOT_HEADER/sizeof(I32 *))
c7724415 739# define OpSLOT(o) (assert_(o->op_slabbed) \
8be227ab 740 (OPSLOT *)(((char *)o)-OPSLOT_HEADER))
8be227ab
FC
741# define OpSLAB(o) OpSLOT(o)->opslot_slab
742# define OpslabREFCNT_dec(slab) \
743 (((slab)->opslab_refcnt == 1) \
744 ? opslab_free_nopad(slab) \
745 : (void)--(slab)->opslab_refcnt)
746 /* Variant that does not null out the pads */
747# define OpslabREFCNT_dec_padok(slab) \
748 (((slab)->opslab_refcnt == 1) \
749 ? opslab_free(slab) \
750 : (void)--(slab)->opslab_refcnt)
c7e45529 751#endif
598921a7 752
1930840b 753struct block_hooks {
52db365a 754 U32 bhk_flags;
1930840b
BM
755 void (*bhk_start) (pTHX_ int full);
756 void (*bhk_pre_end) (pTHX_ OP **seq);
757 void (*bhk_post_end) (pTHX_ OP **seq);
52db365a 758 void (*bhk_eval) (pTHX_ OP *const saveop);
1930840b
BM
759};
760
fd85fad2
BM
761/*
762=head1 Compile-time scope hooks
763
3e4ddde5 764=for apidoc mx|U32|BhkFLAGS|BHK *hk
fd85fad2
BM
765Return the BHK's flags.
766
3e4ddde5 767=for apidoc mx|void *|BhkENTRY|BHK *hk|which
fd85fad2
BM
768Return an entry from the BHK structure. I<which> is a preprocessor token
769indicating which entry to return. If the appropriate flag is not set
770this will return NULL. The type of the return value depends on which
771entry you ask for.
772
3e4ddde5 773=for apidoc Amx|void|BhkENTRY_set|BHK *hk|which|void *ptr
fd85fad2
BM
774Set an entry in the BHK structure, and set the flags to indicate it is
775valid. I<which> is a preprocessing token indicating which entry to set.
776The type of I<ptr> depends on the entry.
777
3e4ddde5 778=for apidoc Amx|void|BhkDISABLE|BHK *hk|which
a3e07c87
BM
779Temporarily disable an entry in this BHK structure, by clearing the
780appropriate flag. I<which> is a preprocessor token indicating which
781entry to disable.
782
3e4ddde5 783=for apidoc Amx|void|BhkENABLE|BHK *hk|which
a3e07c87
BM
784Re-enable an entry in this BHK structure, by setting the appropriate
785flag. I<which> is a preprocessor token indicating which entry to enable.
786This will assert (under -DDEBUGGING) if the entry doesn't contain a valid
787pointer.
788
3e4ddde5 789=for apidoc mx|void|CALL_BLOCK_HOOKS|which|arg
fd85fad2
BM
790Call all the registered block hooks for type I<which>. I<which> is a
791preprocessing token; the type of I<arg> depends on I<which>.
792
793=cut
794*/
795
52db365a
BM
796#define BhkFLAGS(hk) ((hk)->bhk_flags)
797
a88d97bf
BM
798#define BHKf_bhk_start 0x01
799#define BHKf_bhk_pre_end 0x02
800#define BHKf_bhk_post_end 0x04
801#define BHKf_bhk_eval 0x08
52db365a
BM
802
803#define BhkENTRY(hk, which) \
a88d97bf 804 ((BhkFLAGS(hk) & BHKf_ ## which) ? ((hk)->which) : NULL)
52db365a 805
a3e07c87
BM
806#define BhkENABLE(hk, which) \
807 STMT_START { \
808 BhkFLAGS(hk) |= BHKf_ ## which; \
809 assert(BhkENTRY(hk, which)); \
810 } STMT_END
811
812#define BhkDISABLE(hk, which) \
813 STMT_START { \
814 BhkFLAGS(hk) &= ~(BHKf_ ## which); \
815 } STMT_END
816
52db365a
BM
817#define BhkENTRY_set(hk, which, ptr) \
818 STMT_START { \
a88d97bf 819 (hk)->which = ptr; \
a3e07c87 820 BhkENABLE(hk, which); \
52db365a
BM
821 } STMT_END
822
1930840b
BM
823#define CALL_BLOCK_HOOKS(which, arg) \
824 STMT_START { \
825 if (PL_blockhooks) { \
826 I32 i; \
827 for (i = av_len(PL_blockhooks); i >= 0; i--) { \
828 SV *sv = AvARRAY(PL_blockhooks)[i]; \
52db365a 829 BHK *hk; \
1930840b
BM
830 \
831 assert(SvIOK(sv)); \
832 if (SvUOK(sv)) \
52db365a 833 hk = INT2PTR(BHK *, SvUVX(sv)); \
1930840b 834 else \
52db365a 835 hk = INT2PTR(BHK *, SvIVX(sv)); \
1930840b 836 \
52db365a 837 if (BhkENTRY(hk, which)) \
16c91539 838 BhkENTRY(hk, which)(aTHX_ arg); \
1930840b
BM
839 } \
840 } \
841 } STMT_END
842
d9088386
Z
843/* flags for rv2cv_op_cv */
844
845#define RV2CVOPCV_MARK_EARLY 0x00000001
846#define RV2CVOPCV_RETURN_NAME_GV 0x00000002
847
d3d7d28f
FC
848#define op_lvalue(op,t) Perl_op_lvalue_flags(aTHX_ op,t,0)
849
f5d552b4
FC
850/* flags for op_lvalue_flags */
851
852#define OP_LVALUE_NO_CROAK 1
853
9733086d
BM
854/*
855=head1 Custom Operators
856
857=for apidoc Am|U32|XopFLAGS|XOP *xop
858Return the XOP's flags.
859
860=for apidoc Am||XopENTRY|XOP *xop|which
861Return a member of the XOP structure. I<which> is a cpp token indicating
862which entry to return. If the member is not set this will return a
863default value. The return type depends on I<which>.
864
865=for apidoc Am|void|XopENTRY_set|XOP *xop|which|value
866Set a member of the XOP structure. I<which> is a cpp token indicating
867which entry to set. See L<perlguts/"Custom Operators"> for details about
868the available members and how they are used.
869
870=for apidoc Am|void|XopDISABLE|XOP *xop|which
871Temporarily disable a member of the XOP, by clearing the appropriate flag.
872
873=for apidoc Am|void|XopENABLE|XOP *xop|which
874Reenable a member of the XOP which has been disabled.
875
876=cut
877*/
878
1830b3d9
BM
879struct custom_op {
880 U32 xop_flags;
881 const char *xop_name;
882 const char *xop_desc;
883 U32 xop_class;
884 void (*xop_peep)(pTHX_ OP *o, OP *oldop);
885};
886
887#define XopFLAGS(xop) ((xop)->xop_flags)
888
889#define XOPf_xop_name 0x01
890#define XOPf_xop_desc 0x02
891#define XOPf_xop_class 0x04
892#define XOPf_xop_peep 0x08
893
894#define XOPd_xop_name PL_op_name[OP_CUSTOM]
895#define XOPd_xop_desc PL_op_desc[OP_CUSTOM]
896#define XOPd_xop_class OA_BASEOP
897#define XOPd_xop_peep ((Perl_cpeep_t)0)
898
899#define XopENTRY_set(xop, which, to) \
900 STMT_START { \
901 (xop)->which = (to); \
902 (xop)->xop_flags |= XOPf_ ## which; \
903 } STMT_END
904
905#define XopENTRY(xop, which) \
906 ((XopFLAGS(xop) & XOPf_ ## which) ? (xop)->which : XOPd_ ## which)
907
908#define XopDISABLE(xop, which) ((xop)->xop_flags &= ~XOPf_ ## which)
909#define XopENABLE(xop, which) \
910 STMT_START { \
911 (xop)->xop_flags |= XOPf_ ## which; \
912 assert(XopENTRY(xop, which)); \
913 } STMT_END
914
9733086d
BM
915/*
916=head1 Optree Manipulation Functions
917
918=for apidoc Am|const char *|OP_NAME|OP *o
919Return the name of the provided OP. For core ops this looks up the name
920from the op_type; for custom ops from the op_ppaddr.
921
922=for apidoc Am|const char *|OP_DESC|OP *o
923Return a short description of the provided OP.
924
925=for apidoc Am|U32|OP_CLASS|OP *o
926Return the class of the provided OP: that is, which of the *OP
927structures it uses. For core ops this currently gets the information out
928of PL_opargs, which does not always accurately reflect the type used.
929For custom ops the type is returned from the registration, and it is up
930to the registree to ensure it is accurate. The value returned will be
931one of the OA_* constants from op.h.
932
933=cut
934*/
935
1830b3d9
BM
936#define OP_NAME(o) ((o)->op_type == OP_CUSTOM \
937 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_name) \
938 : PL_op_name[(o)->op_type])
939#define OP_DESC(o) ((o)->op_type == OP_CUSTOM \
940 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_desc) \
941 : PL_op_desc[(o)->op_type])
942#define OP_CLASS(o) ((o)->op_type == OP_CUSTOM \
943 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_class) \
944 : (PL_opargs[(o)->op_type] & OA_CLASS_MASK))
945
7bff8c33
NC
946#define newSUB(f, o, p, b) Perl_newATTRSUB(aTHX_ (f), (o), (p), NULL, (b))
947
598921a7
NC
948#ifdef PERL_MAD
949# define MAD_NULL 1
950# define MAD_PV 2
951# define MAD_OP 3
952# define MAD_SV 4
953
954struct madprop {
955 MADPROP* mad_next;
d503a9ba 956 void *mad_val;
598921a7
NC
957 U32 mad_vlen;
958/* short mad_count; */
959 char mad_key;
960 char mad_type;
961};
962
963struct token {
964 I32 tk_type;
965 YYSTYPE tk_lval;
966 MADPROP* tk_mad;
967};
968#endif
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969
970/*
2b3def87 971 * Values that can be held by mad_key :
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972 * ^ unfilled head spot
973 * , literal ,
974 * ; literal ; (blank if implicit ; at end of block)
975 * : literal : from ?: or attr list
976 * + unary +
977 * ? literal ? from ?:
978 * ( literal (
979 * ) literal )
980 * [ literal [
981 * ] literal ]
982 * { literal {
983 * } literal }
984 * @ literal @ sigil
985 * $ literal $ sigil
986 * * literal * sigil
987 * ! use is source filtered
988 * & & or sub
989 * # whitespace/comment following ; or }
990 * # $# sigil
991 * 1 1st ; from for(;;)
992 * 1 retired protasis
993 * 2 2nd ; from for(;;)
994 * 2 retired apodosis
995 * 3 C-style for list
996 * a sub or var attributes
997 * a non-method arrow operator
998 * A method arrow operator
999 * A use import args
1000 * b format block
1001 * B retired stub block
1002 * C constant conditional op
1003 * d declarator
1004 * D do block
1005 * e unreached "else" (see C)
1006 * e expression producing E
1007 * E tr/E/R/, /E/
1008 * f folded constant op
1009 * F peg op for format
63575281 1010 * g op was forced to be a word
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1011 * i if/unless modifier
1012 * I if/elsif/unless statement
dde83331 1013 * k local declarator
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1014 * K retired kid op
1015 * l last index of array ($#foo)
1016 * L label
1017 * m modifier on regex
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1018 * n sub or format name
1019 * o current operator/declarator name
1020 * o else/continue
1021 * O generic optimized op
1022 * p peg to hold extra whitespace at statement level
1023 * P peg op for package declaration
1024 * q opening quote
1025 * = quoted material
1026 * Q closing quote
1027 * Q optimized qw//
1028 * r expression producing R
1029 * R tr/E/R/ s/E/R/
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1030 * s sub signature
1031 * S use import stub (no import)
1032 * S retired sort block
1033 * t unreached "then" (see C)
1034 * U use import op
1035 * v private sv of for loop
1036 * V use version
1037 * w while/until modifier
1038 * W while/for statement
1039 * x optimized qw
1040 * X random thing
1041 * _ whitespace/comments preceding anything else
1042 * ~ =~ operator
1043 */
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1044
1045/*
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1046=head1 Hook manipulation
1047*/
1048
1049#ifdef USE_ITHREADS
1050# define OP_CHECK_MUTEX_INIT MUTEX_INIT(&PL_check_mutex)
1051# define OP_CHECK_MUTEX_LOCK MUTEX_LOCK(&PL_check_mutex)
1052# define OP_CHECK_MUTEX_UNLOCK MUTEX_UNLOCK(&PL_check_mutex)
1053# define OP_CHECK_MUTEX_TERM MUTEX_DESTROY(&PL_check_mutex)
1054#else
1055# define OP_CHECK_MUTEX_INIT NOOP
1056# define OP_CHECK_MUTEX_LOCK NOOP
1057# define OP_CHECK_MUTEX_UNLOCK NOOP
1058# define OP_CHECK_MUTEX_TERM NOOP
1059#endif
1060
1061/*
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1062 * Local variables:
1063 * c-indentation-style: bsd
1064 * c-basic-offset: 4
14d04a33 1065 * indent-tabs-mode: nil
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1066 * End:
1067 *
14d04a33 1068 * ex: set ts=8 sts=4 sw=4 et:
3f2908ec 1069 */