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reduce cost of SvVALID()
[perl5.git] / gv.h
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a0d0e21e 1/* gv.h
79072805 2 *
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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
11struct gp {
12 SV * gp_sv; /* scalar value */
79072805 13 struct io * gp_io; /* filehandle value */
79072805 14 CV * gp_cv; /* subroutine value */
5d855216 15 U32 gp_cvgen; /* generational validity of cached gp_cv */
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16 U32 gp_refcnt; /* how many globs point to this? */
17 HV * gp_hv; /* hash value */
18 AV * gp_av; /* array value */
19 CV * gp_form; /* format value */
20 GV * gp_egv; /* effective gv, if *glob */
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21 PERL_BITFIELD32 gp_line:31; /* line first declared at (for -w) */
22 PERL_BITFIELD32 gp_flags:1;
f4890806 23 HEK * gp_file_hek; /* file first declared in (for -w) */
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24};
25
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26#define GvXPVGV(gv) ((XPVGV*)SvANY(gv))
27
a5f75d66 28
e51a6fb1 29#if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN) && !defined(__INTEL_COMPILER)
dedf8e73 30# define GvGP(gv) \
c43ae56f 31 (0+(*({GV *const _gvgp = (GV *) (gv); \
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32 assert(SvTYPE(_gvgp) == SVt_PVGV || SvTYPE(_gvgp) == SVt_PVLV); \
33 assert(isGV_with_GP(_gvgp)); \
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34 &((_gvgp)->sv_u.svu_gp);})))
35# define GvGP_set(gv,gp) \
36 {GV *const _gvgp = (GV *) (gv); \
37 assert(SvTYPE(_gvgp) == SVt_PVGV || SvTYPE(_gvgp) == SVt_PVLV); \
38 assert(isGV_with_GP(_gvgp)); \
39 (_gvgp)->sv_u.svu_gp = (gp); }
dedf8e73 40# define GvFLAGS(gv) \
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41 (*({GV *const _gvflags = (GV *) (gv); \
42 assert(SvTYPE(_gvflags) == SVt_PVGV || SvTYPE(_gvflags) == SVt_PVLV); \
43 assert(isGV_with_GP(_gvflags)); \
44 &(GvXPVGV(_gvflags)->xpv_cur);}))
c72c5e99 45# define GvSTASH(gv) \
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46 (*({ GV * const _gvstash = (GV *) (gv); \
47 assert(isGV_with_GP(_gvstash)); \
48 assert(SvTYPE(_gvstash) == SVt_PVGV || SvTYPE(_gvstash) >= SVt_PVLV); \
49 &(GvXPVGV(_gvstash)->xnv_u.xgv_stash); \
c72c5e99 50 }))
acda4c6a 51# define GvNAME_HEK(gv) \
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52 (*({ GV * const _gvname_hek = (GV *) (gv); \
53 assert(isGV_with_GP(_gvname_hek)); \
54 assert(SvTYPE(_gvname_hek) == SVt_PVGV || SvTYPE(_gvname_hek) >= SVt_PVLV); \
603aa20d 55 &(GvXPVGV(_gvname_hek)->xiv_u.xivu_namehek); \
acda4c6a 56 }))
1404b487 57# define GvNAME_get(gv) ({ assert(GvNAME_HEK(gv)); (char *)HEK_KEY(GvNAME_HEK(gv)); })
9f616d01 58# define GvNAMELEN_get(gv) ({ assert(GvNAME_HEK(gv)); HEK_LEN(GvNAME_HEK(gv)); })
b2c03ebd 59# define GvNAMEUTF8(gv) ({ assert(GvNAME_HEK(gv)); HEK_UTF8(GvNAME_HEK(gv)); })
c72c5e99 60#else
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61# define GvGP(gv) (0+(gv)->sv_u.svu_gp)
62# define GvGP_set(gv,gp) ((gv)->sv_u.svu_gp = (gp))
5526b5b3 63# define GvFLAGS(gv) (GvXPVGV(gv)->xpv_cur)
58430790 64# define GvSTASH(gv) (GvXPVGV(gv)->xnv_u.xgv_stash)
274ac62a 65# define GvNAME_HEK(gv) (GvXPVGV(gv)->xiv_u.xivu_namehek)
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66# define GvNAME_get(gv) HEK_KEY(GvNAME_HEK(gv))
67# define GvNAMELEN_get(gv) HEK_LEN(GvNAME_HEK(gv))
b2c03ebd 68# define GvNAMEUTF8(gv) HEK_UTF8(GvNAME_HEK(gv))
c72c5e99 69#endif
dedf8e73 70
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71#define GvNAME(gv) GvNAME_get(gv)
72#define GvNAMELEN(gv) GvNAMELEN_get(gv)
73
954c1994 74/*
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75=head1 GV Functions
76
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77=for apidoc Am|SV*|GvSV|GV* gv
78
79Return the SV from the GV.
80
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81=for apidoc Am|AV*|GvAV|GV* gv
82
83Return the AV from the GV.
84
85=for apidoc Am|HV*|GvHV|GV* gv
86
87Return the HV from the GV.
88
89=for apidoc Am|CV*|GvCV|GV* gv
90
91Return the CV from the GV.
92
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93=cut
94*/
95
79072805 96#define GvSV(gv) (GvGP(gv)->gp_sv)
c69033f2 97#ifdef PERL_DONT_CREATE_GVSV
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98#define GvSVn(gv) (*(GvGP(gv)->gp_sv ? \
99 &(GvGP(gv)->gp_sv) : \
100 &(GvGP(gv_SVadd(gv))->gp_sv)))
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101#else
102#define GvSVn(gv) GvSV(gv)
103#endif
104
79072805 105#define GvREFCNT(gv) (GvGP(gv)->gp_refcnt)
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106#define GvIO(gv) \
107 ( \
108 (gv) \
109 && ( \
110 SvTYPE((const SV*)(gv)) == SVt_PVGV \
111 || SvTYPE((const SV*)(gv)) == SVt_PVLV \
112 ) \
113 && GvGP(gv) \
114 ? GvIOp(gv) \
115 : NULL \
116 )
a0d0e21e 117#define GvIOp(gv) (GvGP(gv)->gp_io)
13c59d41 118#define GvIOn(gv) (GvIO(gv) ? GvIOp(gv) : GvIOp(gv_IOadd(gv)))
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119
120#define GvFORM(gv) (GvGP(gv)->gp_form)
121#define GvAV(gv) (GvGP(gv)->gp_av)
44a8e56a 122
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123#define GvAVn(gv) (GvGP(gv)->gp_av ? \
124 GvGP(gv)->gp_av : \
13c59d41 125 GvGP(gv_AVadd(gv))->gp_av)
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126#define GvHV(gv) ((GvGP(gv))->gp_hv)
127
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128#define GvHVn(gv) (GvGP(gv)->gp_hv ? \
129 GvGP(gv)->gp_hv : \
13c59d41 130 GvGP(gv_HVadd(gv))->gp_hv)
79072805 131
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132#define GvCV(gv) (0+GvGP(gv)->gp_cv)
133#define GvCV_set(gv,cv) (GvGP(gv)->gp_cv = (cv))
463ee0b2 134#define GvCVGEN(gv) (GvGP(gv)->gp_cvgen)
601f1833 135#define GvCVu(gv) (GvGP(gv)->gp_cvgen ? NULL : GvGP(gv)->gp_cv)
79072805 136
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137#define GvGPFLAGS(gv) (GvGP(gv)->gp_flags)
138
79072805 139#define GvLINE(gv) (GvGP(gv)->gp_line)
f4890806 140#define GvFILE_HEK(gv) (GvGP(gv)->gp_file_hek)
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141#define GvFILEx(gv) HEK_KEY(GvFILE_HEK(gv))
142#define GvFILE(gv) (GvFILE_HEK(gv) ? GvFILEx(gv) : NULL)
143#define GvFILEGV(gv) (GvFILE_HEK(gv) ? gv_fetchfile(GvFILEx(gv)) : NULL)
79072805 144
79072805 145#define GvEGV(gv) (GvGP(gv)->gp_egv)
099be4f1 146#define GvEGVx(gv) (isGV_with_GP(gv) ? GvEGV(gv) : NULL)
748a9306 147#define GvENAME(gv) GvNAME(GvEGV(gv) ? GvEGV(gv) : gv)
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148#define GvENAMELEN(gv) GvNAMELEN(GvEGV(gv) ? GvEGV(gv) : gv)
149#define GvENAMEUTF8(gv) GvNAMEUTF8(GvEGV(gv) ? GvEGV(gv) : gv)
150#define GvENAME_HEK(gv) GvNAME_HEK(GvEGV(gv) ? GvEGV(gv) : gv)
748a9306 151#define GvESTASH(gv) GvSTASH(GvEGV(gv) ? GvEGV(gv) : gv)
79072805 152
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153/* GVf_INTRO is one-shot flag which indicates that the next assignment
154 of a reference to the glob is to be localised; it distinguishes
155 'local *g = $ref' from '*g = $ref'.
156*/
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157#define GVf_INTRO 0x01
158#define GVf_MULTI 0x02
159#define GVf_ASSUMECV 0x04
a5bc03e9 160/* UNUSED 0x08 */
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161#define GVf_IMPORTED 0xF0
162#define GVf_IMPORTED_SV 0x10
163#define GVf_IMPORTED_AV 0x20
164#define GVf_IMPORTED_HV 0x40
165#define GVf_IMPORTED_CV 0x80
166
167#define GvINTRO(gv) (GvFLAGS(gv) & GVf_INTRO)
168#define GvINTRO_on(gv) (GvFLAGS(gv) |= GVf_INTRO)
169#define GvINTRO_off(gv) (GvFLAGS(gv) &= ~GVf_INTRO)
170
171#define GvMULTI(gv) (GvFLAGS(gv) & GVf_MULTI)
172#define GvMULTI_on(gv) (GvFLAGS(gv) |= GVf_MULTI)
173#define GvMULTI_off(gv) (GvFLAGS(gv) &= ~GVf_MULTI)
174
175#define GvASSUMECV(gv) (GvFLAGS(gv) & GVf_ASSUMECV)
176#define GvASSUMECV_on(gv) (GvFLAGS(gv) |= GVf_ASSUMECV)
177#define GvASSUMECV_off(gv) (GvFLAGS(gv) &= ~GVf_ASSUMECV)
178
179#define GvIMPORTED(gv) (GvFLAGS(gv) & GVf_IMPORTED)
180#define GvIMPORTED_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED)
181#define GvIMPORTED_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED)
182
183#define GvIMPORTED_SV(gv) (GvFLAGS(gv) & GVf_IMPORTED_SV)
184#define GvIMPORTED_SV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_SV)
185#define GvIMPORTED_SV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_SV)
186
187#define GvIMPORTED_AV(gv) (GvFLAGS(gv) & GVf_IMPORTED_AV)
188#define GvIMPORTED_AV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_AV)
189#define GvIMPORTED_AV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_AV)
190
191#define GvIMPORTED_HV(gv) (GvFLAGS(gv) & GVf_IMPORTED_HV)
192#define GvIMPORTED_HV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_HV)
193#define GvIMPORTED_HV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_HV)
194
195#define GvIMPORTED_CV(gv) (GvFLAGS(gv) & GVf_IMPORTED_CV)
196#define GvIMPORTED_CV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_CV)
197#define GvIMPORTED_CV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_CV)
198
3ae1b226 199#ifndef PERL_CORE
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200# define GvIN_PAD(gv) 0
201# define GvIN_PAD_on(gv) NOOP
202# define GvIN_PAD_off(gv) NOOP
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203# define Nullgv Null(GV*)
204#endif
79072805 205
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206#define DM_RUID 0x001
207#define DM_EUID 0x002
6ca8229d 208#define DM_UID (DM_RUID|DM_EUID)
354b0578 209#define DM_ARRAY_ISA 0x004
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210#define DM_RGID 0x010
211#define DM_EGID 0x020
6ca8229d 212#define DM_GID (DM_RGID|DM_EGID)
613a9ec2 213#define DM_DELAY 0x100
79072805 214
0f303493 215/*
864dbfa3 216 * symbol creation flags, for use in gv_fetchpv() and get_*v()
0f303493 217 */
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218#define GV_ADD 0x01 /* add, if symbol not already there
219 For gv_name_set, adding a HEK for the first
220 time, so don't try to free what's there. */
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221#define GV_ADDMULTI 0x02 /* add, pretending it has been added
222 already; used also by gv_init_* */
0f303493 223#define GV_ADDWARN 0x04 /* add, but warn if symbol wasn't already there */
4bff32c5 224 /* 0x08 UNUSED */
0f303493 225#define GV_NOINIT 0x10 /* add, but don't init symbol, if type != PVGV */
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226/* This is used by toke.c to avoid turing placeholder constants in the symbol
227 table into full PVGVs with attached constant subroutines. */
228#define GV_NOADD_NOINIT 0x20 /* Don't add the symbol if it's not there.
229 Don't init it if it is there but ! PVGV */
e26df76a 230#define GV_NOEXPAND 0x40 /* Don't expand SvOK() entries to PVGV */
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231#define GV_NOTQUAL 0x80 /* A plain symbol name, not qualified with a
232 package (so skip checks for :: and ') */
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233#define GV_AUTOLOAD 0x100 /* gv_fetchmethod_flags() should AUTOLOAD */
234#define GV_CROAK 0x200 /* gv_fetchmethod_flags() should croak */
23496c6e 235#define GV_ADDMG 0x400 /* add if magical */
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236#define GV_NO_SVGMAGIC 0x800 /* Skip get-magic on an SV argument;
237 used only by gv_fetchsv(_nomg) */
d283e876 238#define GV_CACHE_ONLY 0x1000 /* return stash only if found in cache;
239 used only in flags parameter to gv_stash* family */
add2581e 240
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241/* Flags for gv_fetchmeth_pvn and gv_autoload_pvn*/
242#define GV_SUPER 0x1000 /* SUPER::method */
243
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244/* Flags for gv_autoload_*/
245#define GV_AUTOLOAD_ISMETHOD 1 /* autoloading a method? */
246
7a5fd60d 247/* SVf_UTF8 (more accurately the return value from SvUTF8) is also valid
04ec7e59 248 as a flag to various gv_* functions, so ensure it lies
0eeb01b9 249 outside this range.
7a5fd60d 250*/
780a5241 251
23496c6e 252#define GV_NOADD_MASK \
77cb3b01 253 (SVf_UTF8|GV_NOADD_NOINIT|GV_NOEXPAND|GV_NOTQUAL|GV_ADDMG|GV_NO_SVGMAGIC)
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254/* The bit flags that don't cause gv_fetchpv() to add a symbol if not
255 found (with the exception GV_ADDMG, which *might* cause the symbol
256 to be added) */
780a5241 257
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258#define gv_fullname3(sv,gv,prefix) gv_fullname4(sv,gv,prefix,TRUE)
259#define gv_efullname3(sv,gv,prefix) gv_efullname4(sv,gv,prefix,TRUE)
887986eb 260#define gv_fetchmethod(stash, name) gv_fetchmethod_autoload(stash, name, TRUE)
77cb3b01 261#define gv_fetchsv_nomg(n,f,t) gv_fetchsv(n,(f)|GV_NO_SVGMAGIC,t)
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262#define gv_init(gv,stash,name,len,multi) \
263 gv_init_pvn(gv,stash,name,len,GV_ADDMULTI*!!(multi))
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264#define gv_fetchmeth(stash,name,len,level) gv_fetchmeth_pvn(stash, name, len, level, 0)
265#define gv_fetchmeth_autoload(stash,name,len,level) gv_fetchmeth_pvn_autoload(stash, name, len, level, 0)
44130a26 266#define gv_fetchmethod_flags(stash,name,flags) gv_fetchmethod_pv_flags(stash, name, flags)
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267#define gv_autoload4(stash, name, len, method) \
268 gv_autoload_pvn(stash, name, len, !!(method))
9cc50d5b 269#define newGVgen(pack) newGVgen_flags(pack, 0)
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270#define gv_method_changed(gv) \
271 ( \
272 assert_(isGV_with_GP(gv)) \
273 GvREFCNT(gv) > 1 \
274 ? (void)++PL_sub_generation \
275 : mro_method_changed_in(GvSTASH(gv)) \
276 )
f4890806 277
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278#define gv_AVadd(gv) gv_add_by_type((gv), SVt_PVAV)
279#define gv_HVadd(gv) gv_add_by_type((gv), SVt_PVHV)
280#define gv_IOadd(gv) gv_add_by_type((gv), SVt_PVIO)
281#define gv_SVadd(gv) gv_add_by_type((gv), SVt_NULL)
d5713896 282
f4890806 283/*
14d04a33 284 * ex: set ts=8 sts=4 sw=4 et:
f4890806 285 */