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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.
2814eb74
PJ
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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NC
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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DL
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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JD
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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FC
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: */
5f05dabc
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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PP
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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FC
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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FC
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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PP
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 */
c8fe3bdf
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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RGS
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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DM
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 */
e26df76a
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
ef3e5ea9
NC
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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LW
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
9c007264
JH
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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RH
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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GG
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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RGS
303/* Private for OP_(MAP|GREP)(WHILE|START) */
304#define OPpGREP_LEX 2 /* iterate over lexical $_ */
305
0d863452
RH
306/* Private for OP_ENTEREVAL */
307#define OPpEVAL_HAS_HH 2 /* Does it have a copy of %^H */
802a15e9 308#define OPpEVAL_UNICODE 4
7d789282
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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FC
314#define OPpOFFBYONE 128 /* Treat caller(1) as caller(2) */
315
e664e0a4 316/* Private for OP_COREARGS */
8dc99089
FC
317/* These must not conflict with OPpDONT_INIT_GV or OPpALLOW_FAKE.
318 See pp.c:S_rv2gv. */
e664e0a4
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
5db1eb8d
BF
324/* Private for OP_(LAST|REDO|NEXT|GOTO|DUMP) */
325#define OPpPV_IS_UTF8 128 /* label is in UTF8 */
326
60041a09
FC
327/* Private for OP_SPLIT */
328#define OPpSPLIT_IMPLIM 128 /* implicit limit */
329
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330struct op {
331 BASEOP
332};
333
334struct unop {
335 BASEOP
336 OP * op_first;
337};
338
339struct binop {
340 BASEOP
341 OP * op_first;
342 OP * op_last;
343};
344
345struct logop {
346 BASEOP
347 OP * op_first;
348 OP * op_other;
349};
350
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351struct listop {
352 BASEOP
353 OP * op_first;
354 OP * op_last;
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355};
356
357struct pmop {
358 BASEOP
359 OP * op_first;
360 OP * op_last;
1fcf4c12 361#ifdef USE_ITHREADS
784e50c8 362 PADOFFSET op_pmoffset;
1fcf4c12
AB
363#else
364 REGEXP * op_pmregexp; /* compiled expression */
365#endif
69bdead3 366 U32 op_pmflags;
29f2e912 367 union {
20e98b0f
NC
368 OP * op_pmreplroot; /* For OP_SUBST */
369#ifdef USE_ITHREADS
370 PADOFFSET op_pmtargetoff; /* For OP_PUSHRE */
371#else
372 GV * op_pmtargetgv;
373#endif
374 } op_pmreplrootu;
375 union {
29f2e912 376 OP * op_pmreplstart; /* Only used in OP_SUBST */
cb55de95 377#ifdef USE_ITHREADS
23083432 378 PADOFFSET op_pmstashoff; /* Only used in OP_MATCH, with PMf_ONCE set */
cb55de95 379#else
29f2e912 380 HV * op_pmstash;
cb55de95 381#endif
29f2e912 382 } op_pmstashstartu;
68e2671b 383 OP * op_code_list; /* list of (?{}) code blocks */
79072805 384};
a0d0e21e 385
1fcf4c12 386#ifdef USE_ITHREADS
14a49a24
NC
387#define PM_GETRE(o) (SvTYPE(PL_regex_pad[(o)->op_pmoffset]) == SVt_REGEXP \
388 ? (REGEXP*)(PL_regex_pad[(o)->op_pmoffset]) : NULL)
ede1273d
NC
389/* The assignment is just to enforce type safety (or at least get a warning).
390 */
14a49a24
NC
391/* With first class regexps not via a reference one needs to assign
392 &PL_sv_undef under ithreads. (This would probably work unthreaded, but NULL
393 is cheaper. I guess we could allow NULL, but the check above would get
394 more complex, and we'd have an AV with (SV*)NULL in it, which feels bad */
395/* BEWARE - something that calls this macro passes (r) which has a side
396 effect. */
ede1273d 397#define PM_SETRE(o,r) STMT_START { \
b1bc3f34 398 REGEXP *const _pm_setre = (r); \
7948fc08 399 assert(_pm_setre); \
b1bc3f34 400 PL_regex_pad[(o)->op_pmoffset] = MUTABLE_SV(_pm_setre); \
ede1273d 401 } STMT_END
1fcf4c12 402#else
b9ed2502
AB
403#define PM_GETRE(o) ((o)->op_pmregexp)
404#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
1fcf4c12 405#endif
4825b64b 406
beae72ee
KW
407/* Leave some space, so future bit allocations can go either in the shared or
408 * unshared area without affecting binary compatibility */
df7a8460 409#define PMf_BASE_SHIFT (_RXf_PMf_SHIFT_NEXT+6)
f4a4cecb 410
ef07e810 411/* 'use re "taint"' in scope: taint $1 etc. if target tainted */
1ad4ec54 412#define PMf_RETAINT (1<<(PMf_BASE_SHIFT+0))
c737faaf 413
c0f1c194
KW
414/* match successfully only once per reset, with related flag RXf_USED in
415 * re->extflags holding state. This is used only for ?? matches, and only on
416 * OP_MATCH and OP_QR */
1ad4ec54 417#define PMf_ONCE (1<<(PMf_BASE_SHIFT+1))
1850c8f9 418
d234778b 419/* PMf_ONCE, i.e. ?pat?, has matched successfully. Not used under threading. */
1ad4ec54 420#define PMf_USED (1<<(PMf_BASE_SHIFT+3))
1850c8f9
KW
421
422/* subst replacement is constant */
1ad4ec54 423#define PMf_CONST (1<<(PMf_BASE_SHIFT+4))
c737faaf 424
1850c8f9 425/* keep 1st runtime pattern forever */
1ad4ec54 426#define PMf_KEEP (1<<(PMf_BASE_SHIFT+5))
4da3eb8b 427
1ad4ec54 428#define PMf_GLOBAL (1<<(PMf_BASE_SHIFT+6)) /* pattern had a g modifier */
c737faaf 429
1850c8f9 430/* don't reset pos() if //g fails */
1ad4ec54 431#define PMf_CONTINUE (1<<(PMf_BASE_SHIFT+7))
1850c8f9
KW
432
433/* evaluating replacement as expr */
1ad4ec54 434#define PMf_EVAL (1<<(PMf_BASE_SHIFT+8))
c0f1c194
KW
435
436/* Return substituted string instead of modifying it. */
1ad4ec54 437#define PMf_NONDESTRUCT (1<<(PMf_BASE_SHIFT+9))
e357fc67 438
d63c20f2
DM
439/* the pattern has a CV attached (currently only under qr/...(?{}).../) */
440#define PMf_HAS_CV (1<<(PMf_BASE_SHIFT+10))
441
867940b8
DM
442/* op_code_list is private; don't free it etc. It may well point to
443 * code within another sub, with different pad etc */
444#define PMf_CODELIST_PRIVATE (1<<(PMf_BASE_SHIFT+11))
445
2a92a973
DM
446/* the PMOP is a QR (we should be able to detect that from the op type,
447 * but the regex compilation API passes just the pm flags, not the op
448 * itself */
449#define PMf_IS_QR (1<<(PMf_BASE_SHIFT+12))
a5ae69f0 450#define PMf_USE_RE_EVAL (1<<(PMf_BASE_SHIFT+13)) /* use re'eval' in scope */
2a92a973 451
a5ae69f0 452#if PMf_BASE_SHIFT+13 > 31
32cdcf9d 453# error Too many PMf_ bits used. See above and regnodes.h for any spare in middle
1850c8f9 454#endif
79072805 455
cb55de95 456#ifdef USE_ITHREADS
05ec9bb3 457
23083432
FC
458# define PmopSTASH(o) ((o)->op_pmflags & PMf_ONCE \
459 ? PL_stashpad[(o)->op_pmstashstartu.op_pmstashoff] \
460 : NULL)
461# define PmopSTASH_set(o,hv) \
462 (assert_((o)->op_pmflags & PMf_ONCE) \
463 (o)->op_pmstashstartu.op_pmstashoff = \
01f44973 464 (hv) ? alloccopstash(hv) : 0)
cb55de95 465#else
29f2e912
NC
466# define PmopSTASH(o) \
467 (((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstash : NULL)
468# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
469# define PmopSTASH_set(o,hv) ({ \
470 assert((o)->op_pmflags & PMf_ONCE); \
471 ((o)->op_pmstashstartu.op_pmstash = (hv)); \
472 })
473# else
474# define PmopSTASH_set(o,hv) ((o)->op_pmstashstartu.op_pmstash = (hv))
475# endif
cb55de95 476#endif
23083432
FC
477#define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME_get(PmopSTASH(o)) : NULL)
478 /* op_pmstashstartu.op_pmstash is not refcounted */
479#define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
cb55de95 480
79072805
LW
481struct svop {
482 BASEOP
483 SV * op_sv;
484};
485
7934575e 486struct padop {
79072805 487 BASEOP
7934575e 488 PADOFFSET op_padix;
79072805
LW
489};
490
491struct pvop {
492 BASEOP
493 char * op_pv;
494};
495
79072805
LW
496struct loop {
497 BASEOP
498 OP * op_first;
499 OP * op_last;
79072805
LW
500 OP * op_redoop;
501 OP * op_nextop;
502 OP * op_lastop;
503};
504
350de78d
GS
505#define cUNOPx(o) ((UNOP*)o)
506#define cBINOPx(o) ((BINOP*)o)
507#define cLISTOPx(o) ((LISTOP*)o)
508#define cLOGOPx(o) ((LOGOP*)o)
509#define cPMOPx(o) ((PMOP*)o)
510#define cSVOPx(o) ((SVOP*)o)
511#define cPADOPx(o) ((PADOP*)o)
512#define cPVOPx(o) ((PVOP*)o)
513#define cCOPx(o) ((COP*)o)
514#define cLOOPx(o) ((LOOP*)o)
515
516#define cUNOP cUNOPx(PL_op)
517#define cBINOP cBINOPx(PL_op)
518#define cLISTOP cLISTOPx(PL_op)
519#define cLOGOP cLOGOPx(PL_op)
520#define cPMOP cPMOPx(PL_op)
521#define cSVOP cSVOPx(PL_op)
522#define cPADOP cPADOPx(PL_op)
523#define cPVOP cPVOPx(PL_op)
524#define cCOP cCOPx(PL_op)
525#define cLOOP cLOOPx(PL_op)
526
527#define cUNOPo cUNOPx(o)
528#define cBINOPo cBINOPx(o)
529#define cLISTOPo cLISTOPx(o)
530#define cLOGOPo cLOGOPx(o)
531#define cPMOPo cPMOPx(o)
532#define cSVOPo cSVOPx(o)
533#define cPADOPo cPADOPx(o)
534#define cPVOPo cPVOPx(o)
535#define cCOPo cCOPx(o)
536#define cLOOPo cLOOPx(o)
537
538#define kUNOP cUNOPx(kid)
539#define kBINOP cBINOPx(kid)
540#define kLISTOP cLISTOPx(kid)
541#define kLOGOP cLOGOPx(kid)
542#define kPMOP cPMOPx(kid)
543#define kSVOP cSVOPx(kid)
544#define kPADOP cPADOPx(kid)
545#define kPVOP cPVOPx(kid)
546#define kCOP cCOPx(kid)
547#define kLOOP cLOOPx(kid)
548
549
550#ifdef USE_ITHREADS
dd2155a4 551# define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix))
cecf5685
NC
552# define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && isGV_with_GP(v) \
553 && GvIN_PAD(v))
f5a0fd1e
FC
554# define IS_PADCONST(v) \
555 (v && (SvREADONLY(v) || (SvIsCOW(v) && !SvLEN(v))))
7766f137 556# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
dd2155a4 557 ? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
638eceb6 558# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
dd2155a4 559 ? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
350de78d 560#else
638eceb6 561# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
743e66e6 562# define IS_PADGV(v) FALSE
7766f137
GS
563# define IS_PADCONST(v) FALSE
564# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
638eceb6 565# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
350de78d 566#endif
79072805 567
638eceb6
GS
568#define cGVOP_gv cGVOPx_gv(PL_op)
569#define cGVOPo_gv cGVOPx_gv(o)
570#define kGVOP_gv cGVOPx_gv(kid)
571#define cSVOP_sv cSVOPx_sv(PL_op)
572#define cSVOPo_sv cSVOPx_sv(o)
573#define kSVOP_sv cSVOPx_sv(kid)
7766f137 574
bcabcc50
NC
575#ifndef PERL_CORE
576# define Nullop ((OP*)NULL)
577#endif
79072805 578
cee4176c 579/* Lowest byte of PL_opargs */
a0d0e21e
LW
580#define OA_MARK 1
581#define OA_FOLDCONST 2
582#define OA_RETSCALAR 4
583#define OA_TARGET 8
903fd87c 584#define OA_TARGLEX 16
a0d0e21e
LW
585#define OA_OTHERINT 32
586#define OA_DANGEROUS 64
587#define OA_DEFGV 128
588
db173bac 589/* The next 4 bits encode op class information */
903fd87c 590#define OCSHIFT 8
b162f9ea
IZ
591
592#define OA_CLASS_MASK (15 << OCSHIFT)
593
594#define OA_BASEOP (0 << OCSHIFT)
595#define OA_UNOP (1 << OCSHIFT)
596#define OA_BINOP (2 << OCSHIFT)
597#define OA_LOGOP (3 << OCSHIFT)
1a67a97c
SM
598#define OA_LISTOP (4 << OCSHIFT)
599#define OA_PMOP (5 << OCSHIFT)
600#define OA_SVOP (6 << OCSHIFT)
7934575e 601#define OA_PADOP (7 << OCSHIFT)
1a67a97c
SM
602#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
603#define OA_LOOP (9 << OCSHIFT)
604#define OA_COP (10 << OCSHIFT)
605#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
606#define OA_FILESTATOP (12 << OCSHIFT)
607#define OA_LOOPEXOP (13 << OCSHIFT)
b162f9ea 608
903fd87c 609#define OASHIFT 12
a0d0e21e 610
4369b173 611/* Remaining nybbles of PL_opargs */
a0d0e21e
LW
612#define OA_SCALAR 1
613#define OA_LIST 2
614#define OA_AVREF 3
615#define OA_HVREF 4
616#define OA_CVREF 5
617#define OA_FILEREF 6
618#define OA_SCALARREF 7
619#define OA_OPTIONAL 8
620
d3c72c2a
DM
621/* Op_REFCNT is a reference count at the head of each op tree: needed
622 * since the tree is shared between threads, and between cloned closure
623 * copies in the same thread. OP_REFCNT_LOCK/UNLOCK is used when modifying
624 * this count.
625 * The same mutex is used to protect the refcounts of the reg_trie_data
626 * and reg_ac_data structures, which are shared between duplicated
627 * regexes.
628 */
629
534825c4
GS
630#ifdef USE_ITHREADS
631# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
4026c95a
SH
632# ifdef PERL_CORE
633# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
634# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
635# else
636# define OP_REFCNT_LOCK op_refcnt_lock()
637# define OP_REFCNT_UNLOCK op_refcnt_unlock()
638# endif
534825c4 639# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
534825c4
GS
640#else
641# define OP_REFCNT_INIT NOOP
642# define OP_REFCNT_LOCK NOOP
643# define OP_REFCNT_UNLOCK NOOP
644# define OP_REFCNT_TERM NOOP
534825c4 645#endif
e4783991 646
282f25c9 647#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
fc97af9c
NC
648#ifdef PERL_DEBUG_READONLY_OPS
649# define OpREFCNT_inc(o) Perl_op_refcnt_inc(aTHX_ o)
650# define OpREFCNT_dec(o) Perl_op_refcnt_dec(aTHX_ o)
651#else
652# define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : NULL)
653# define OpREFCNT_dec(o) (--(o)->op_targ)
654#endif
282f25c9 655
e4783991 656/* flags used by Perl_load_module() */
ec6d81ab
RGS
657#define PERL_LOADMOD_DENY 0x1 /* no Module */
658#define PERL_LOADMOD_NOIMPORT 0x2 /* use Module () */
659#define PERL_LOADMOD_IMPORT_OPS 0x4 /* use Module (...) */
e5dd39fc 660
a0c21aa1 661#if defined(PERL_IN_PERLY_C) || defined(PERL_IN_OP_C)
e4c5ccf3 662#define ref(o, type) doref(o, type, TRUE)
a0c21aa1 663#endif
e4c5ccf3 664
5983a79d
BM
665/*
666=head1 Optree Manipulation Functions
667
668=for apidoc Am|OP*|LINKLIST|OP *o
669Given the root of an optree, link the tree in execution order using the
670C<op_next> pointers and return the first op executed. If this has
671already been done, it will not be redone, and C<< o->op_next >> will be
672returned. If C<< o->op_next >> is not already set, I<o> should be at
673least an C<UNOP>.
674
675=cut
676*/
677
678#define LINKLIST(o) ((o)->op_next ? (o)->op_next : op_linklist((OP*)o))
679
33f36c71
NC
680/* no longer used anywhere in core */
681#ifndef PERL_CORE
46471bde 682#define cv_ckproto(cv, gv, p) \
f717afa7 683 cv_ckproto_len_flags((cv), (gv), (p), (p) ? strlen(p) : 0, 0)
33f36c71
NC
684#endif
685
7d0905b9
NC
686#ifdef PERL_CORE
687# define my(o) my_attrs((o), NULL)
688#endif
689
e5dd39fc 690#ifdef USE_REENTRANT_API
10bc17b6 691#include "reentr.h"
e5dd39fc
AB
692#endif
693
c7e45529 694#define NewOp(m,var,c,type) \
e91d68d5 695 (var = (type *) Perl_Slab_Alloc(aTHX_ c*sizeof(type)))
c7e45529 696#define NewOpSz(m,var,size) \
e91d68d5 697 (var = (OP *) Perl_Slab_Alloc(aTHX_ size))
c7e45529 698#define FreeOp(p) Perl_Slab_Free(aTHX_ p)
8be227ab
FC
699
700/*
701 * The per-CV op slabs consist of a header (the opslab struct) and a bunch
702 * of space for allocating op slots, each of which consists of two pointers
703 * followed by an op. The first pointer points to the next op slot. The
704 * second points to the slab. At the end of the slab is a null pointer,
705 * so that slot->opslot_next - slot can be used to determine the size
706 * of the op.
707 *
708 * Each CV can have multiple slabs; opslab_next points to the next slab, to
709 * form a chain. All bookkeeping is done on the first slab, which is where
710 * all the op slots point.
711 *
712 * Freed ops are marked as freed and attached to the freed chain
713 * via op_next pointers.
714 *
715 * When there is more than one slab, the second slab in the slab chain is
716 * assumed to be the one with free space available. It is used when allo-
717 * cating an op if there are no freed ops available or big enough.
718 */
719
7aef8e5b 720#ifdef PERL_CORE
8be227ab
FC
721struct opslot {
722 /* keep opslot_next first */
723 OPSLOT * opslot_next; /* next slot */
724 OPSLAB * opslot_slab; /* owner */
725 OP opslot_op; /* the op itself */
726};
727
728struct opslab {
729 OPSLOT * opslab_first; /* first op in this slab */
730 OPSLAB * opslab_next; /* next slab */
731 OP * opslab_freed; /* chain of freed ops */
732 size_t opslab_refcnt; /* number of ops */
3107b51f
FC
733# ifdef PERL_DEBUG_READONLY_OPS
734 U16 opslab_size; /* size of slab in pointers */
735 bool opslab_readonly;
736# endif
8be227ab
FC
737 OPSLOT opslab_slots; /* slots begin here */
738};
739
740# define OPSLOT_HEADER STRUCT_OFFSET(OPSLOT, opslot_op)
741# define OPSLOT_HEADER_P (OPSLOT_HEADER/sizeof(I32 *))
c7724415 742# define OpSLOT(o) (assert_(o->op_slabbed) \
8be227ab 743 (OPSLOT *)(((char *)o)-OPSLOT_HEADER))
8be227ab
FC
744# define OpSLAB(o) OpSLOT(o)->opslot_slab
745# define OpslabREFCNT_dec(slab) \
746 (((slab)->opslab_refcnt == 1) \
747 ? opslab_free_nopad(slab) \
748 : (void)--(slab)->opslab_refcnt)
749 /* Variant that does not null out the pads */
750# define OpslabREFCNT_dec_padok(slab) \
751 (((slab)->opslab_refcnt == 1) \
752 ? opslab_free(slab) \
753 : (void)--(slab)->opslab_refcnt)
c7e45529 754#endif
598921a7 755
1930840b 756struct block_hooks {
52db365a 757 U32 bhk_flags;
1930840b
BM
758 void (*bhk_start) (pTHX_ int full);
759 void (*bhk_pre_end) (pTHX_ OP **seq);
760 void (*bhk_post_end) (pTHX_ OP **seq);
52db365a 761 void (*bhk_eval) (pTHX_ OP *const saveop);
1930840b
BM
762};
763
fd85fad2
BM
764/*
765=head1 Compile-time scope hooks
766
3e4ddde5 767=for apidoc mx|U32|BhkFLAGS|BHK *hk
fd85fad2
BM
768Return the BHK's flags.
769
3e4ddde5 770=for apidoc mx|void *|BhkENTRY|BHK *hk|which
fd85fad2
BM
771Return an entry from the BHK structure. I<which> is a preprocessor token
772indicating which entry to return. If the appropriate flag is not set
773this will return NULL. The type of the return value depends on which
774entry you ask for.
775
3e4ddde5 776=for apidoc Amx|void|BhkENTRY_set|BHK *hk|which|void *ptr
fd85fad2
BM
777Set an entry in the BHK structure, and set the flags to indicate it is
778valid. I<which> is a preprocessing token indicating which entry to set.
779The type of I<ptr> depends on the entry.
780
3e4ddde5 781=for apidoc Amx|void|BhkDISABLE|BHK *hk|which
a3e07c87
BM
782Temporarily disable an entry in this BHK structure, by clearing the
783appropriate flag. I<which> is a preprocessor token indicating which
784entry to disable.
785
3e4ddde5 786=for apidoc Amx|void|BhkENABLE|BHK *hk|which
a3e07c87
BM
787Re-enable an entry in this BHK structure, by setting the appropriate
788flag. I<which> is a preprocessor token indicating which entry to enable.
789This will assert (under -DDEBUGGING) if the entry doesn't contain a valid
790pointer.
791
3e4ddde5 792=for apidoc mx|void|CALL_BLOCK_HOOKS|which|arg
fd85fad2
BM
793Call all the registered block hooks for type I<which>. I<which> is a
794preprocessing token; the type of I<arg> depends on I<which>.
795
796=cut
797*/
798
52db365a
BM
799#define BhkFLAGS(hk) ((hk)->bhk_flags)
800
a88d97bf
BM
801#define BHKf_bhk_start 0x01
802#define BHKf_bhk_pre_end 0x02
803#define BHKf_bhk_post_end 0x04
804#define BHKf_bhk_eval 0x08
52db365a
BM
805
806#define BhkENTRY(hk, which) \
a88d97bf 807 ((BhkFLAGS(hk) & BHKf_ ## which) ? ((hk)->which) : NULL)
52db365a 808
a3e07c87
BM
809#define BhkENABLE(hk, which) \
810 STMT_START { \
811 BhkFLAGS(hk) |= BHKf_ ## which; \
812 assert(BhkENTRY(hk, which)); \
813 } STMT_END
814
815#define BhkDISABLE(hk, which) \
816 STMT_START { \
817 BhkFLAGS(hk) &= ~(BHKf_ ## which); \
818 } STMT_END
819
52db365a
BM
820#define BhkENTRY_set(hk, which, ptr) \
821 STMT_START { \
a88d97bf 822 (hk)->which = ptr; \
a3e07c87 823 BhkENABLE(hk, which); \
52db365a
BM
824 } STMT_END
825
1930840b
BM
826#define CALL_BLOCK_HOOKS(which, arg) \
827 STMT_START { \
828 if (PL_blockhooks) { \
829 I32 i; \
830 for (i = av_len(PL_blockhooks); i >= 0; i--) { \
831 SV *sv = AvARRAY(PL_blockhooks)[i]; \
52db365a 832 BHK *hk; \
1930840b
BM
833 \
834 assert(SvIOK(sv)); \
835 if (SvUOK(sv)) \
52db365a 836 hk = INT2PTR(BHK *, SvUVX(sv)); \
1930840b 837 else \
52db365a 838 hk = INT2PTR(BHK *, SvIVX(sv)); \
1930840b 839 \
52db365a 840 if (BhkENTRY(hk, which)) \
16c91539 841 BhkENTRY(hk, which)(aTHX_ arg); \
1930840b
BM
842 } \
843 } \
844 } STMT_END
845
d9088386
Z
846/* flags for rv2cv_op_cv */
847
848#define RV2CVOPCV_MARK_EARLY 0x00000001
849#define RV2CVOPCV_RETURN_NAME_GV 0x00000002
850
d3d7d28f
FC
851#define op_lvalue(op,t) Perl_op_lvalue_flags(aTHX_ op,t,0)
852
f5d552b4
FC
853/* flags for op_lvalue_flags */
854
855#define OP_LVALUE_NO_CROAK 1
856
9733086d
BM
857/*
858=head1 Custom Operators
859
860=for apidoc Am|U32|XopFLAGS|XOP *xop
861Return the XOP's flags.
862
863=for apidoc Am||XopENTRY|XOP *xop|which
864Return a member of the XOP structure. I<which> is a cpp token indicating
865which entry to return. If the member is not set this will return a
866default value. The return type depends on I<which>.
867
868=for apidoc Am|void|XopENTRY_set|XOP *xop|which|value
869Set a member of the XOP structure. I<which> is a cpp token indicating
870which entry to set. See L<perlguts/"Custom Operators"> for details about
871the available members and how they are used.
872
873=for apidoc Am|void|XopDISABLE|XOP *xop|which
874Temporarily disable a member of the XOP, by clearing the appropriate flag.
875
876=for apidoc Am|void|XopENABLE|XOP *xop|which
877Reenable a member of the XOP which has been disabled.
878
879=cut
880*/
881
1830b3d9
BM
882struct custom_op {
883 U32 xop_flags;
884 const char *xop_name;
885 const char *xop_desc;
886 U32 xop_class;
887 void (*xop_peep)(pTHX_ OP *o, OP *oldop);
888};
889
890#define XopFLAGS(xop) ((xop)->xop_flags)
891
892#define XOPf_xop_name 0x01
893#define XOPf_xop_desc 0x02
894#define XOPf_xop_class 0x04
895#define XOPf_xop_peep 0x08
896
897#define XOPd_xop_name PL_op_name[OP_CUSTOM]
898#define XOPd_xop_desc PL_op_desc[OP_CUSTOM]
899#define XOPd_xop_class OA_BASEOP
900#define XOPd_xop_peep ((Perl_cpeep_t)0)
901
902#define XopENTRY_set(xop, which, to) \
903 STMT_START { \
904 (xop)->which = (to); \
905 (xop)->xop_flags |= XOPf_ ## which; \
906 } STMT_END
907
908#define XopENTRY(xop, which) \
909 ((XopFLAGS(xop) & XOPf_ ## which) ? (xop)->which : XOPd_ ## which)
910
911#define XopDISABLE(xop, which) ((xop)->xop_flags &= ~XOPf_ ## which)
912#define XopENABLE(xop, which) \
913 STMT_START { \
914 (xop)->xop_flags |= XOPf_ ## which; \
915 assert(XopENTRY(xop, which)); \
916 } STMT_END
917
9733086d
BM
918/*
919=head1 Optree Manipulation Functions
920
921=for apidoc Am|const char *|OP_NAME|OP *o
922Return the name of the provided OP. For core ops this looks up the name
923from the op_type; for custom ops from the op_ppaddr.
924
925=for apidoc Am|const char *|OP_DESC|OP *o
926Return a short description of the provided OP.
927
928=for apidoc Am|U32|OP_CLASS|OP *o
929Return the class of the provided OP: that is, which of the *OP
930structures it uses. For core ops this currently gets the information out
931of PL_opargs, which does not always accurately reflect the type used.
932For custom ops the type is returned from the registration, and it is up
933to the registree to ensure it is accurate. The value returned will be
934one of the OA_* constants from op.h.
935
936=cut
937*/
938
1830b3d9
BM
939#define OP_NAME(o) ((o)->op_type == OP_CUSTOM \
940 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_name) \
941 : PL_op_name[(o)->op_type])
942#define OP_DESC(o) ((o)->op_type == OP_CUSTOM \
943 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_desc) \
944 : PL_op_desc[(o)->op_type])
945#define OP_CLASS(o) ((o)->op_type == OP_CUSTOM \
946 ? XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_class) \
947 : (PL_opargs[(o)->op_type] & OA_CLASS_MASK))
948
7bff8c33
NC
949#define newSUB(f, o, p, b) Perl_newATTRSUB(aTHX_ (f), (o), (p), NULL, (b))
950
598921a7
NC
951#ifdef PERL_MAD
952# define MAD_NULL 1
953# define MAD_PV 2
954# define MAD_OP 3
955# define MAD_SV 4
956
957struct madprop {
958 MADPROP* mad_next;
d503a9ba 959 void *mad_val;
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960 U32 mad_vlen;
961/* short mad_count; */
962 char mad_key;
963 char mad_type;
964};
965
966struct token {
967 I32 tk_type;
968 YYSTYPE tk_lval;
969 MADPROP* tk_mad;
970};
971#endif
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972
973/*
2b3def87 974 * Values that can be held by mad_key :
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975 * ^ unfilled head spot
976 * , literal ,
977 * ; literal ; (blank if implicit ; at end of block)
978 * : literal : from ?: or attr list
979 * + unary +
980 * ? literal ? from ?:
981 * ( literal (
982 * ) literal )
983 * [ literal [
984 * ] literal ]
985 * { literal {
986 * } literal }
987 * @ literal @ sigil
988 * $ literal $ sigil
989 * * literal * sigil
990 * ! use is source filtered
991 * & & or sub
992 * # whitespace/comment following ; or }
993 * # $# sigil
994 * 1 1st ; from for(;;)
995 * 1 retired protasis
996 * 2 2nd ; from for(;;)
997 * 2 retired apodosis
998 * 3 C-style for list
999 * a sub or var attributes
1000 * a non-method arrow operator
1001 * A method arrow operator
1002 * A use import args
1003 * b format block
1004 * B retired stub block
1005 * C constant conditional op
1006 * d declarator
1007 * D do block
1008 * e unreached "else" (see C)
1009 * e expression producing E
1010 * E tr/E/R/, /E/
1011 * f folded constant op
1012 * F peg op for format
63575281 1013 * g op was forced to be a word
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1014 * i if/unless modifier
1015 * I if/elsif/unless statement
dde83331 1016 * k local declarator
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1017 * K retired kid op
1018 * l last index of array ($#foo)
1019 * L label
1020 * m modifier on regex
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1021 * n sub or format name
1022 * o current operator/declarator name
1023 * o else/continue
1024 * O generic optimized op
1025 * p peg to hold extra whitespace at statement level
1026 * P peg op for package declaration
1027 * q opening quote
1028 * = quoted material
1029 * Q closing quote
1030 * Q optimized qw//
1031 * r expression producing R
1032 * R tr/E/R/ s/E/R/
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1033 * s sub signature
1034 * S use import stub (no import)
1035 * S retired sort block
1036 * t unreached "then" (see C)
1037 * U use import op
1038 * v private sv of for loop
1039 * V use version
1040 * w while/until modifier
1041 * W while/for statement
1042 * x optimized qw
1043 * X random thing
1044 * _ whitespace/comments preceding anything else
1045 * ~ =~ operator
1046 */
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1047
1048/*
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1049=head1 Hook manipulation
1050*/
1051
1052#ifdef USE_ITHREADS
1053# define OP_CHECK_MUTEX_INIT MUTEX_INIT(&PL_check_mutex)
1054# define OP_CHECK_MUTEX_LOCK MUTEX_LOCK(&PL_check_mutex)
1055# define OP_CHECK_MUTEX_UNLOCK MUTEX_UNLOCK(&PL_check_mutex)
1056# define OP_CHECK_MUTEX_TERM MUTEX_DESTROY(&PL_check_mutex)
1057#else
1058# define OP_CHECK_MUTEX_INIT NOOP
1059# define OP_CHECK_MUTEX_LOCK NOOP
1060# define OP_CHECK_MUTEX_UNLOCK NOOP
1061# define OP_CHECK_MUTEX_TERM NOOP
1062#endif
1063
1064/*
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1065 * Local variables:
1066 * c-indentation-style: bsd
1067 * c-basic-offset: 4
14d04a33 1068 * indent-tabs-mode: nil
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1069 * End:
1070 *
14d04a33 1071 * ex: set ts=8 sts=4 sw=4 et:
3f2908ec 1072 */