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OPf_SPECIAL on OP_DBSTATE now indicates a breakpoint.
[perl5.git] / op.h
CommitLineData
a0d0e21e 1/* op.h
79072805 2 *
be3c0a43 3 * Copyright (c) 1991-2002, Larry Wall
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4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
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8 */
9
10/*
11 * The fields of BASEOP are:
12 * op_next Pointer to next ppcode to execute after this one.
13 * (Top level pre-grafted op points to first op,
14 * but this is replaced when op is grafted in, when
15 * this op will point to the real next op, and the new
16 * parent takes over role of remembering starting op.)
17 * op_ppaddr Pointer to current ppcode's function.
18 * op_type The type of the operation.
19 * op_flags Flags common to all operations. See OPf_* below.
20 * op_private Flags peculiar to a particular operation (BUT,
21 * by default, set to the number of children until
22 * the operation is privatized by a check routine,
23 * which may or may not check number of children).
24 */
25
4633a7c4 26#ifdef DEBUGGING_OPS
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27#define OPCODE opcode
28#else
29#define OPCODE U16
30#endif
31
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32#ifdef BASEOP_DEFINITION
33#define BASEOP BASEOP_DEFINITION
34#else
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35#define BASEOP \
36 OP* op_next; \
37 OP* op_sibling; \
4f63d024 38 OP* (CPERLscope(*op_ppaddr))(pTHX); \
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39 PADOFFSET op_targ; \
40 OPCODE op_type; \
41 U16 op_seq; \
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42 U8 op_flags; \
43 U8 op_private;
0f4eea8f 44#endif
79072805 45
54310121
PP
46#define OP_GIMME(op,dfl) \
47 (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \
48 ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
49 ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \
50 dfl)
51
954c1994 52/*
ccfc67b7
JH
53=head1 "Gimme" Values
54
954c1994
GS
55=for apidoc Amn|U32|GIMME_V
56The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
91e74348 57C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
954c1994
GS
58respectively.
59
60=for apidoc Amn|U32|GIMME
61A backward-compatible version of C<GIMME_V> which can only return
62C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
63Deprecated. Use C<GIMME_V> instead.
64
65=cut
66*/
67
533c011a 68#define GIMME_V OP_GIMME(PL_op, block_gimme())
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69
70/* Public flags */
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71
72#define OPf_WANT 3 /* Mask for "want" bits: */
73#define OPf_WANT_VOID 1 /* Want nothing */
74#define OPf_WANT_SCALAR 2 /* Want single value */
75#define OPf_WANT_LIST 3 /* Want list of any length */
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76#define OPf_KIDS 4 /* There is a firstborn child. */
77#define OPf_PARENS 8 /* This operator was parenthesized. */
463ee0b2 78 /* (Or block needs explicit scope entry.) */
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79#define OPf_REF 16 /* Certified reference. */
80 /* (Return container, not containee). */
81#define OPf_MOD 32 /* Will modify (lvalue). */
82#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
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83#define OPf_SPECIAL 128 /* Do something weird for this op: */
84 /* On local LVAL, don't init local value. */
85 /* On OP_SORT, subroutine is inlined. */
86 /* On OP_NOT, inversion was implicit. */
a0d0e21e 87 /* On OP_LEAVE, don't restore curpm. */
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88 /* On truncate, we truncate filehandle */
89 /* On control verbs, we saw no label */
90 /* On flipflop, we saw ... instead of .. */
91 /* On UNOPs, saw bare parens, e.g. eof(). */
a0d0e21e 92 /* On OP_ENTERSUB || OP_NULL, saw a "do". */
afebc493 93 /* On OP_EXISTS, treat av as av, not avhv. */
f2ec2afd 94 /* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
54b9620d 95 /* On OP_ENTERITER, loop var is per-thread */
497711e7
GS
96 /* On pushre, re is /\s+/ imp. by split " " */
97 /* On regcomp, "use re 'eval'" was in scope */
7c6fadd6 98 /* On OP_READLINE, was <$filehandle> */
4e3399f9 99 /* On RV2[SG]V, don't create GV--in defined()*/
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100 /* On OP_DBSTATE, indicates breakpoint
101 * (runtime property) */
79072805 102
54310121 103/* old names; don't use in new code, but don't break them, either */
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104#define OPf_LIST OPf_WANT_LIST
105#define OPf_KNOW OPf_WANT
954c1994 106
54310121 107#define GIMME \
62a559b8
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108 (PL_op->op_flags & OPf_WANT \
109 ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
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110 ? G_ARRAY \
111 : G_SCALAR) \
112 : dowantarray())
54310121 113
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114/* NOTE: OP_NEXTSTATE, OP_DBSTATE, and OP_SETSTATE (i.e. COPs) carry lower
115 * bits of PL_hints in op_private */
116
a0d0e21e 117/* Private for lvalues */
cd06dffe 118#define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */
a0d0e21e 119
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120/* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */
121#define OPpREFCOUNTED 64 /* op_targ carries a refcount */
122
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123/* Private for OP_AASSIGN */
124#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
125
126/* Private for OP_SASSIGN */
127#define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
79072805 128
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129/* Private for OP_MATCH and OP_SUBST{,CONST} */
130#define OPpRUNTIME 64 /* Pattern coming in on the stack */
131
79072805 132/* Private for OP_TRANS */
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133#define OPpTRANS_FROM_UTF 1
134#define OPpTRANS_TO_UTF 2
383e7cdd 135#define OPpTRANS_IDENTICAL 4 /* right side is same as left */
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LW
136#define OPpTRANS_SQUASH 8
137#define OPpTRANS_DELETE 16
138#define OPpTRANS_COMPLEMENT 32
139#define OPpTRANS_GROWS 64
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140
141/* Private for OP_REPEAT */
a0d0e21e 142#define OPpREPEAT_DOLIST 64 /* List replication. */
79072805 143
d3011074 144/* Private for OP_RV2?V, OP_?ELEM */
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PP
145#define OPpDEREF (32|64) /* Want ref to something: */
146#define OPpDEREF_AV 32 /* Want ref to AV. */
147#define OPpDEREF_HV 64 /* Want ref to HV. */
148#define OPpDEREF_SV (32|64) /* Want ref to SV. */
68dc0745
PP
149 /* OP_ENTERSUB only */
150#define OPpENTERSUB_DB 16 /* Debug subroutine. */
d3011074 151#define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */
95f0a2f1 152#define OPpENTERSUB_NOMOD 64 /* Immune to mod() for :attrlist. */
7a52d87a 153 /* OP_RV2CV only */
68dc0745 154#define OPpENTERSUB_AMPER 8 /* Used & form to call. */
9675f7ac 155#define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */
cd06dffe 156#define OPpENTERSUB_INARGS 4 /* Lval used as arg to a sub. */
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157 /* OP_GV only */
158#define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */
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159 /* OP_?ELEM only */
160#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
64aac5a9 161 /* OP_RV2?V, OP_GVSV only */
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162#define OPpOUR_INTRO 16 /* Variable was in an our() */
163 /* OP_RV2[AH]V, OP_PAD[AH]V, OP_[AH]ELEM */
164#define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */
192587c2 165 /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */
79072805 166
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167/* Private for OPs with TARGLEX */
168 /* (lower bits may carry MAXARG) */
169#define OPpTARGET_MY 16 /* Target is PADMY. */
170
79072805 171/* Private for OP_CONST */
7a52d87a 172#define OPpCONST_STRICT 8 /* bearword subject to strict 'subs' */
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173#define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
174#define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */
a0d0e21e 175#define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
599cee73 176#define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */
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177
178/* Private for OP_FLIP/FLOP */
a0d0e21e 179#define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
79072805 180
ed6116ce 181/* Private for OP_LIST */
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182#define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
183
5f05dabc 184/* Private for OP_DELETE */
54310121 185#define OPpSLICE 64 /* Operating on a list of keys */
5f05dabc 186
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187/* Private for OP_EXISTS */
188#define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */
189
9c007264
JH
190/* Private for OP_SORT */
191#define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */
192#define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */
193#define OPpSORT_REVERSE 4 /* Descending sort */
224a4551
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194/* Private for OP_THREADSV */
195#define OPpDONE_SVREF 64 /* Been through newSVREF once */
554b3eca 196
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197/* Private for OP_OPEN and OP_BACKTICK */
198#define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */
199#define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */
200#define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */
201#define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */
202
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203/* Private for OP_EXIT, HUSH also for OP_DIE */
204#define OPpHUSH_VMSISH 64 /* hush DCL exit msg vmsish mode*/
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205#define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/
206
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207struct op {
208 BASEOP
209};
210
211struct unop {
212 BASEOP
213 OP * op_first;
214};
215
216struct binop {
217 BASEOP
218 OP * op_first;
219 OP * op_last;
220};
221
222struct logop {
223 BASEOP
224 OP * op_first;
225 OP * op_other;
226};
227
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228struct listop {
229 BASEOP
230 OP * op_first;
231 OP * op_last;
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232};
233
234struct pmop {
235 BASEOP
236 OP * op_first;
237 OP * op_last;
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238 OP * op_pmreplroot;
239 OP * op_pmreplstart;
240 PMOP * op_pmnext; /* list of all scanpats */
1fcf4c12 241#ifdef USE_ITHREADS
fd1bc7eb 242 IV op_pmoffset;
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AB
243#else
244 REGEXP * op_pmregexp; /* compiled expression */
245#endif
699a3330 246 U32 op_pmflags;
e2509266 247 U32 op_pmpermflags;
48c036b1 248 U8 op_pmdynflags;
cb55de95
JH
249#ifdef USE_ITHREADS
250 char * op_pmstashpv;
251#else
252 HV * op_pmstash;
253#endif
79072805 254};
a0d0e21e 255
1fcf4c12 256#ifdef USE_ITHREADS
ba89bb6e 257#define PM_GETRE(o) (INT2PTR(REGEXP*,SvIVX(PL_regex_pad[(o)->op_pmoffset])))
dd7d6c2b 258#define PM_SETRE(o,r) STMT_START { SV* sv = PL_regex_pad[(o)->op_pmoffset]; sv_setiv(sv, PTR2IV(r)); } STMT_END
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259#define PM_GETRE_SAFE(o) (PL_regex_pad ? PM_GETRE(o) : (REGEXP*)0)
260#define PM_SETRE_SAFE(o,r) if (PL_regex_pad) PM_SETRE(o,r)
1fcf4c12 261#else
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262#define PM_GETRE(o) ((o)->op_pmregexp)
263#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
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264#define PM_GETRE_SAFE PM_GETRE
265#define PM_SETRE_SAFE PM_SETRE
1fcf4c12 266#endif
4825b64b 267
48c036b1 268#define PMdf_USED 0x01 /* pm has been used once already */
b3eb6a9b 269#define PMdf_TAINTED 0x02 /* pm compiled from tainted pattern */
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JH
270#define PMdf_UTF8 0x04 /* pm compiled from utf8 data */
271#define PMdf_DYN_UTF8 0x08
272
273#define PMdf_CMP_UTF8 (PMdf_UTF8|PMdf_DYN_UTF8)
48c036b1 274
b3eb6a9b 275#define PMf_RETAINT 0x0001 /* taint $1 etc. if target tainted */
a0d0e21e 276#define PMf_ONCE 0x0002 /* use pattern only once per reset */
699a3330 277#define PMf_UNUSED 0x0004 /* free for use */
ce862d02 278#define PMf_MAYBE_CONST 0x0008 /* replacement contains variables */
a0d0e21e 279#define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */
8782bef2 280#define PMf_WHITE 0x0020 /* pattern is \s+ */
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281#define PMf_CONST 0x0040 /* subst replacement is constant */
282#define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */
283#define PMf_GLOBAL 0x0100 /* pattern had a g modifier */
c90c0ff4 284#define PMf_CONTINUE 0x0200 /* don't reset pos() if //g fails */
a0d0e21e 285#define PMf_EVAL 0x0400 /* evaluating replacement as expr */
8782bef2 286#define PMf_LOCALE 0x0800 /* use locale for character types */
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287#define PMf_MULTILINE 0x1000 /* assume multiple lines */
288#define PMf_SINGLELINE 0x2000 /* assume single line */
8782bef2 289#define PMf_FOLD 0x4000 /* case insensitivity */
a0d0e21e 290#define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */
79072805 291
8782bef2
GB
292/* mask of bits stored in regexp->reganch */
293#define PMf_COMPILETIME (PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED)
294
cb55de95 295#ifdef USE_ITHREADS
05ec9bb3 296
cb55de95 297# define PmopSTASHPV(o) ((o)->op_pmstashpv)
05ec9bb3 298# define PmopSTASHPV_set(o,pv) (PmopSTASHPV(o) = savesharedpv(pv))
cb55de95
JH
299# define PmopSTASH(o) (PmopSTASHPV(o) \
300 ? gv_stashpv(PmopSTASHPV(o),GV_ADD) : Nullhv)
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301# define PmopSTASH_set(o,hv) PmopSTASHPV_set(o, ((hv) ? HvNAME(hv) : Nullch))
302# define PmopSTASH_free(o) PerlMemShared_free(PmopSTASHPV(o))
303
cb55de95
JH
304#else
305# define PmopSTASH(o) ((o)->op_pmstash)
306# define PmopSTASH_set(o,hv) ((o)->op_pmstash = (hv))
307# define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME(PmopSTASH(o)) : Nullch)
308 /* op_pmstash is not refcounted */
309# define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
05ec9bb3 310# define PmopSTASH_free(o)
cb55de95
JH
311#endif
312
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313struct svop {
314 BASEOP
315 SV * op_sv;
316};
317
7934575e 318struct padop {
79072805 319 BASEOP
7934575e 320 PADOFFSET op_padix;
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321};
322
323struct pvop {
324 BASEOP
325 char * op_pv;
326};
327
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328struct loop {
329 BASEOP
330 OP * op_first;
331 OP * op_last;
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332 OP * op_redoop;
333 OP * op_nextop;
334 OP * op_lastop;
335};
336
350de78d
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337#define cUNOPx(o) ((UNOP*)o)
338#define cBINOPx(o) ((BINOP*)o)
339#define cLISTOPx(o) ((LISTOP*)o)
340#define cLOGOPx(o) ((LOGOP*)o)
341#define cPMOPx(o) ((PMOP*)o)
342#define cSVOPx(o) ((SVOP*)o)
343#define cPADOPx(o) ((PADOP*)o)
344#define cPVOPx(o) ((PVOP*)o)
345#define cCOPx(o) ((COP*)o)
346#define cLOOPx(o) ((LOOP*)o)
347
348#define cUNOP cUNOPx(PL_op)
349#define cBINOP cBINOPx(PL_op)
350#define cLISTOP cLISTOPx(PL_op)
351#define cLOGOP cLOGOPx(PL_op)
352#define cPMOP cPMOPx(PL_op)
353#define cSVOP cSVOPx(PL_op)
354#define cPADOP cPADOPx(PL_op)
355#define cPVOP cPVOPx(PL_op)
356#define cCOP cCOPx(PL_op)
357#define cLOOP cLOOPx(PL_op)
358
359#define cUNOPo cUNOPx(o)
360#define cBINOPo cBINOPx(o)
361#define cLISTOPo cLISTOPx(o)
362#define cLOGOPo cLOGOPx(o)
363#define cPMOPo cPMOPx(o)
364#define cSVOPo cSVOPx(o)
365#define cPADOPo cPADOPx(o)
366#define cPVOPo cPVOPx(o)
367#define cCOPo cCOPx(o)
368#define cLOOPo cLOOPx(o)
369
370#define kUNOP cUNOPx(kid)
371#define kBINOP cBINOPx(kid)
372#define kLISTOP cLISTOPx(kid)
373#define kLOGOP cLOGOPx(kid)
374#define kPMOP cPMOPx(kid)
375#define kSVOP cSVOPx(kid)
376#define kPADOP cPADOPx(kid)
377#define kPVOP cPVOPx(kid)
378#define kCOP cCOPx(kid)
379#define kLOOP cLOOPx(kid)
380
381
382#ifdef USE_ITHREADS
dd2155a4 383# define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix))
743e66e6 384# define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && GvIN_PAD(v))
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GS
385# define IS_PADCONST(v) (v && SvREADONLY(v))
386# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
dd2155a4 387 ? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
638eceb6 388# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
dd2155a4 389 ? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
350de78d 390#else
638eceb6 391# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
743e66e6 392# define IS_PADGV(v) FALSE
7766f137
GS
393# define IS_PADCONST(v) FALSE
394# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
638eceb6 395# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
350de78d 396#endif
79072805 397
638eceb6
GS
398#define cGVOP_gv cGVOPx_gv(PL_op)
399#define cGVOPo_gv cGVOPx_gv(o)
400#define kGVOP_gv cGVOPx_gv(kid)
401#define cSVOP_sv cSVOPx_sv(PL_op)
402#define cSVOPo_sv cSVOPx_sv(o)
403#define kSVOP_sv cSVOPx_sv(kid)
7766f137 404
79072805
LW
405#define Nullop Null(OP*)
406
91135acb 407/* Lowest byte-and-a-bit of PL_opargs */
a0d0e21e
LW
408#define OA_MARK 1
409#define OA_FOLDCONST 2
410#define OA_RETSCALAR 4
411#define OA_TARGET 8
412#define OA_RETINTEGER 16
413#define OA_OTHERINT 32
414#define OA_DANGEROUS 64
415#define OA_DEFGV 128
b162f9ea 416#define OA_TARGLEX 256
a0d0e21e 417
db173bac 418/* The next 4 bits encode op class information */
b162f9ea
IZ
419#define OCSHIFT 9
420
421#define OA_CLASS_MASK (15 << OCSHIFT)
422
423#define OA_BASEOP (0 << OCSHIFT)
424#define OA_UNOP (1 << OCSHIFT)
425#define OA_BINOP (2 << OCSHIFT)
426#define OA_LOGOP (3 << OCSHIFT)
1a67a97c
SM
427#define OA_LISTOP (4 << OCSHIFT)
428#define OA_PMOP (5 << OCSHIFT)
429#define OA_SVOP (6 << OCSHIFT)
7934575e 430#define OA_PADOP (7 << OCSHIFT)
1a67a97c
SM
431#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
432#define OA_LOOP (9 << OCSHIFT)
433#define OA_COP (10 << OCSHIFT)
434#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
435#define OA_FILESTATOP (12 << OCSHIFT)
436#define OA_LOOPEXOP (13 << OCSHIFT)
b162f9ea
IZ
437
438#define OASHIFT 13
a0d0e21e 439
4369b173 440/* Remaining nybbles of PL_opargs */
a0d0e21e
LW
441#define OA_SCALAR 1
442#define OA_LIST 2
443#define OA_AVREF 3
444#define OA_HVREF 4
445#define OA_CVREF 5
446#define OA_FILEREF 6
447#define OA_SCALARREF 7
448#define OA_OPTIONAL 8
449
534825c4
GS
450#ifdef USE_ITHREADS
451# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
452# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
453# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
454# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
534825c4
GS
455#else
456# define OP_REFCNT_INIT NOOP
457# define OP_REFCNT_LOCK NOOP
458# define OP_REFCNT_UNLOCK NOOP
459# define OP_REFCNT_TERM NOOP
534825c4 460#endif
e4783991 461
282f25c9
JH
462#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
463#define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : Nullop)
464#define OpREFCNT_dec(o) (--(o)->op_targ)
465
e4783991
GS
466/* flags used by Perl_load_module() */
467#define PERL_LOADMOD_DENY 0x1
468#define PERL_LOADMOD_NOIMPORT 0x2
469#define PERL_LOADMOD_IMPORT_OPS 0x4
e5dd39fc
AB
470
471#ifdef USE_REENTRANT_API
10bc17b6 472#include "reentr.h"
e5dd39fc
AB
473#endif
474