Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* cop.h |
79072805 | 2 | * |
3818b22b | 3 | * Copyright (c) 1991-2000, Larry Wall |
79072805 LW |
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 | * | |
79072805 LW |
8 | */ |
9 | ||
79072805 LW |
10 | struct cop { |
11 | BASEOP | |
a0d0e21e | 12 | char * cop_label; /* label for this construct */ |
57843af0 | 13 | #ifdef USE_ITHREADS |
11faa288 | 14 | char * cop_stashpv; /* package line was compiled in */ |
57843af0 GS |
15 | char * cop_file; /* file name the following line # is from */ |
16 | #else | |
11faa288 | 17 | HV * cop_stash; /* package line was compiled in */ |
79072805 | 18 | GV * cop_filegv; /* file the following line # is from */ |
57843af0 | 19 | #endif |
a0d0e21e LW |
20 | U32 cop_seq; /* parse sequence number */ |
21 | I32 cop_arybase; /* array base this line was compiled with */ | |
79072805 | 22 | line_t cop_line; /* line # of this command */ |
599cee73 | 23 | SV * cop_warnings; /* lexical warnings bitmask */ |
79072805 LW |
24 | }; |
25 | ||
26 | #define Nullcop Null(COP*) | |
27 | ||
57843af0 GS |
28 | #ifdef USE_ITHREADS |
29 | # define CopFILE(c) ((c)->cop_file) | |
30 | # define CopFILEGV(c) (CopFILE(c) \ | |
31 | ? gv_fetchfile(CopFILE(c)) : Nullgv) | |
32 | # define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) /* XXX */ | |
33 | # define CopFILESV(c) (CopFILE(c) \ | |
34 | ? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv) | |
35 | # define CopFILEAV(c) (CopFILE(c) \ | |
36 | ? GvAV(gv_fetchfile(CopFILE(c))) : Nullav) | |
57843af0 | 37 | # define CopSTASHPV(c) ((c)->cop_stashpv) |
11faa288 GS |
38 | # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savepv(pv)) /* XXX */ |
39 | # define CopSTASH(c) (CopSTASHPV(c) \ | |
40 | ? gv_stashpv(CopSTASHPV(c),GV_ADD) : Nullhv) | |
41 | # define CopSTASH_set(c,hv) CopSTASHPV_set(c, HvNAME(hv)) | |
ed094faf GS |
42 | # define CopSTASH_eq(c,hv) (hv \ |
43 | && (CopSTASHPV(c) == HvNAME(hv) \ | |
44 | || (CopSTASHPV(c) && HvNAME(hv) \ | |
45 | && strEQ(CopSTASHPV(c), HvNAME(hv))))) | |
57843af0 GS |
46 | #else |
47 | # define CopFILEGV(c) ((c)->cop_filegv) | |
48 | # define CopFILEGV_set(c,gv) ((c)->cop_filegv = gv) | |
49 | # define CopFILE_set(c,pv) ((c)->cop_filegv = gv_fetchfile(pv)) | |
50 | # define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv) | |
51 | # define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav) | |
52 | # define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch) | |
53 | # define CopSTASH(c) ((c)->cop_stash) | |
54 | # define CopSTASH_set(c,hv) ((c)->cop_stash = hv) | |
55 | # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch) | |
11faa288 | 56 | # define CopSTASHPV_set(c,pv) CopSTASH_set(c, gv_stashpv(pv,GV_ADD)) |
ed094faf | 57 | # define CopSTASH_eq(c,hv) (CopSTASH(c) == hv) |
57843af0 GS |
58 | #endif /* USE_ITHREADS */ |
59 | ||
ed094faf | 60 | #define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv)) |
cc49e20b | 61 | #define CopLINE(c) ((c)->cop_line) |
57843af0 GS |
62 | #define CopLINE_inc(c) (++CopLINE(c)) |
63 | #define CopLINE_dec(c) (--CopLINE(c)) | |
64 | #define CopLINE_set(c,l) (CopLINE(c) = (l)) | |
cc49e20b | 65 | |
79072805 LW |
66 | /* |
67 | * Here we have some enormously heavy (or at least ponderous) wizardry. | |
68 | */ | |
69 | ||
70 | /* subroutine context */ | |
71 | struct block_sub { | |
72 | CV * cv; | |
73 | GV * gv; | |
463ee0b2 | 74 | GV * dfoutgv; |
6d4ff0d2 | 75 | #ifndef USE_THREADS |
79072805 | 76 | AV * savearray; |
6d4ff0d2 | 77 | #endif /* USE_THREADS */ |
79072805 LW |
78 | AV * argarray; |
79 | U16 olddepth; | |
80 | U8 hasargs; | |
cd06dffe | 81 | U8 lval; /* XXX merge lval and hasargs? */ |
79072805 LW |
82 | }; |
83 | ||
84 | #define PUSHSUB(cx) \ | |
85 | cx->blk_sub.cv = cv; \ | |
79072805 | 86 | cx->blk_sub.olddepth = CvDEPTH(cv); \ |
cd06dffe GS |
87 | cx->blk_sub.hasargs = hasargs; \ |
88 | cx->blk_sub.lval = PL_op->op_private & \ | |
89 | (OPpLVAL_INTRO|OPpENTERSUB_INARGS); | |
79072805 LW |
90 | |
91 | #define PUSHFORMAT(cx) \ | |
92 | cx->blk_sub.cv = cv; \ | |
93 | cx->blk_sub.gv = gv; \ | |
4633a7c4 | 94 | cx->blk_sub.hasargs = 0; \ |
3280af22 | 95 | cx->blk_sub.dfoutgv = PL_defoutgv; \ |
4633a7c4 | 96 | (void)SvREFCNT_inc(cx->blk_sub.dfoutgv) |
79072805 | 97 | |
6d4ff0d2 | 98 | #ifdef USE_THREADS |
7766f137 | 99 | # define POP_SAVEARRAY() NOOP |
6d4ff0d2 | 100 | #else |
7766f137 | 101 | # define POP_SAVEARRAY() \ |
6d4ff0d2 | 102 | STMT_START { \ |
3280af22 | 103 | SvREFCNT_dec(GvAV(PL_defgv)); \ |
a8bba7fa | 104 | GvAV(PL_defgv) = cx->blk_sub.savearray; \ |
6d4ff0d2 MB |
105 | } STMT_END |
106 | #endif /* USE_THREADS */ | |
107 | ||
7766f137 GS |
108 | #ifdef USE_ITHREADS |
109 | /* junk in @_ spells trouble when cloning CVs, so don't leave any */ | |
110 | # define CLEAR_ARGARRAY() av_clear(cx->blk_sub.argarray) | |
111 | #else | |
112 | # define CLEAR_ARGARRAY() NOOP | |
113 | #endif /* USE_ITHREADS */ | |
114 | ||
115 | ||
b0d9ce38 GS |
116 | #define POPSUB(cx,sv) \ |
117 | STMT_START { \ | |
a8bba7fa | 118 | if (cx->blk_sub.hasargs) { \ |
7766f137 | 119 | POP_SAVEARRAY(); \ |
d8b46c1b | 120 | /* abandon @_ if it got reified */ \ |
a8bba7fa GS |
121 | if (AvREAL(cx->blk_sub.argarray)) { \ |
122 | SSize_t fill = AvFILLp(cx->blk_sub.argarray); \ | |
123 | SvREFCNT_dec(cx->blk_sub.argarray); \ | |
124 | cx->blk_sub.argarray = newAV(); \ | |
125 | av_extend(cx->blk_sub.argarray, fill); \ | |
126 | AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \ | |
127 | PL_curpad[0] = (SV*)cx->blk_sub.argarray; \ | |
d8b46c1b | 128 | } \ |
7766f137 GS |
129 | else { \ |
130 | CLEAR_ARGARRAY(); \ | |
131 | } \ | |
79072805 | 132 | } \ |
b0d9ce38 GS |
133 | sv = (SV*)cx->blk_sub.cv; \ |
134 | if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \ | |
135 | sv = Nullsv; \ | |
136 | } STMT_END | |
137 | ||
138 | #define LEAVESUB(sv) \ | |
139 | STMT_START { \ | |
140 | if (sv) \ | |
141 | SvREFCNT_dec(sv); \ | |
142 | } STMT_END | |
79072805 LW |
143 | |
144 | #define POPFORMAT(cx) \ | |
4633a7c4 LW |
145 | setdefout(cx->blk_sub.dfoutgv); \ |
146 | SvREFCNT_dec(cx->blk_sub.dfoutgv); | |
79072805 LW |
147 | |
148 | /* eval context */ | |
149 | struct block_eval { | |
150 | I32 old_in_eval; | |
151 | I32 old_op_type; | |
0f79a09d | 152 | SV * old_namesv; |
79072805 | 153 | OP * old_eval_root; |
748a9306 | 154 | SV * cur_text; |
79072805 LW |
155 | }; |
156 | ||
8990e307 | 157 | #define PUSHEVAL(cx,n,fgv) \ |
0f79a09d | 158 | STMT_START { \ |
3280af22 | 159 | cx->blk_eval.old_in_eval = PL_in_eval; \ |
a8bba7fa | 160 | cx->blk_eval.old_op_type = PL_op->op_type; \ |
0f79a09d | 161 | cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : Nullsv); \ |
a8bba7fa | 162 | cx->blk_eval.old_eval_root = PL_eval_root; \ |
0f79a09d GS |
163 | cx->blk_eval.cur_text = PL_linestr; \ |
164 | } STMT_END | |
79072805 LW |
165 | |
166 | #define POPEVAL(cx) \ | |
0f79a09d | 167 | STMT_START { \ |
3280af22 | 168 | PL_in_eval = cx->blk_eval.old_in_eval; \ |
79072805 | 169 | optype = cx->blk_eval.old_op_type; \ |
7766f137 | 170 | PL_eval_root = cx->blk_eval.old_eval_root; \ |
0f79a09d GS |
171 | if (cx->blk_eval.old_namesv) \ |
172 | sv_2mortal(cx->blk_eval.old_namesv); \ | |
173 | } STMT_END | |
79072805 LW |
174 | |
175 | /* loop context */ | |
176 | struct block_loop { | |
177 | char * label; | |
178 | I32 resetsp; | |
179 | OP * redo_op; | |
180 | OP * next_op; | |
181 | OP * last_op; | |
7766f137 GS |
182 | #ifdef USE_ITHREADS |
183 | void * iterdata; | |
184 | #else | |
79072805 | 185 | SV ** itervar; |
7766f137 | 186 | #endif |
79072805 | 187 | SV * itersave; |
5f05dabc | 188 | SV * iterlval; |
79072805 | 189 | AV * iterary; |
89ea2908 GA |
190 | IV iterix; |
191 | IV itermax; | |
79072805 LW |
192 | }; |
193 | ||
7766f137 GS |
194 | #ifdef USE_ITHREADS |
195 | # define CxITERVAR(c) \ | |
196 | ((c)->blk_loop.iterdata \ | |
197 | ? (CxPADLOOP(cx) \ | |
198 | ? &PL_curpad[(PADOFFSET)(c)->blk_loop.iterdata] \ | |
199 | : &GvSV((GV*)(c)->blk_loop.iterdata)) \ | |
200 | : (SV**)NULL) | |
201 | # define CX_ITERDATA_SET(cx,idata) \ | |
155aba94 | 202 | if ((cx->blk_loop.iterdata = (idata))) \ |
7766f137 GS |
203 | cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); |
204 | #else | |
205 | # define CxITERVAR(c) ((c)->blk_loop.itervar) | |
206 | # define CX_ITERDATA_SET(cx,ivar) \ | |
155aba94 | 207 | if ((cx->blk_loop.itervar = (SV**)(ivar))) \ |
7766f137 GS |
208 | cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); |
209 | #endif | |
210 | ||
211 | #define PUSHLOOP(cx, dat, s) \ | |
38a230cb GS |
212 | cx->blk_loop.label = PL_curcop->cop_label; \ |
213 | cx->blk_loop.resetsp = s - PL_stack_base; \ | |
79072805 LW |
214 | cx->blk_loop.redo_op = cLOOP->op_redoop; \ |
215 | cx->blk_loop.next_op = cLOOP->op_nextop; \ | |
216 | cx->blk_loop.last_op = cLOOP->op_lastop; \ | |
44a8e56a | 217 | cx->blk_loop.iterlval = Nullsv; \ |
218 | cx->blk_loop.iterary = Nullav; \ | |
7766f137 GS |
219 | cx->blk_loop.iterix = -1; \ |
220 | CX_ITERDATA_SET(cx,dat); | |
79072805 LW |
221 | |
222 | #define POPLOOP(cx) \ | |
a8bba7fa | 223 | SvREFCNT_dec(cx->blk_loop.iterlval); \ |
7766f137 GS |
224 | if (CxITERVAR(cx)) { \ |
225 | SV **s_v_p = CxITERVAR(cx); \ | |
226 | sv_2mortal(*s_v_p); \ | |
227 | *s_v_p = cx->blk_loop.itersave; \ | |
44a8e56a | 228 | } \ |
a8bba7fa GS |
229 | if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\ |
230 | SvREFCNT_dec(cx->blk_loop.iterary); | |
79072805 LW |
231 | |
232 | /* context common to subroutines, evals and loops */ | |
233 | struct block { | |
234 | I32 blku_oldsp; /* stack pointer to copy stuff down to */ | |
235 | COP * blku_oldcop; /* old curcop pointer */ | |
236 | I32 blku_oldretsp; /* return stack index */ | |
237 | I32 blku_oldmarksp; /* mark stack index */ | |
238 | I32 blku_oldscopesp; /* scope stack index */ | |
239 | PMOP * blku_oldpm; /* values of pattern match vars */ | |
240 | U8 blku_gimme; /* is this block running in list context? */ | |
241 | ||
242 | union { | |
243 | struct block_sub blku_sub; | |
244 | struct block_eval blku_eval; | |
245 | struct block_loop blku_loop; | |
246 | } blk_u; | |
247 | }; | |
248 | #define blk_oldsp cx_u.cx_blk.blku_oldsp | |
249 | #define blk_oldcop cx_u.cx_blk.blku_oldcop | |
250 | #define blk_oldretsp cx_u.cx_blk.blku_oldretsp | |
251 | #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp | |
252 | #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp | |
253 | #define blk_oldpm cx_u.cx_blk.blku_oldpm | |
254 | #define blk_gimme cx_u.cx_blk.blku_gimme | |
255 | #define blk_sub cx_u.cx_blk.blk_u.blku_sub | |
256 | #define blk_eval cx_u.cx_blk.blk_u.blku_eval | |
257 | #define blk_loop cx_u.cx_blk.blk_u.blku_loop | |
258 | ||
259 | /* Enter a block. */ | |
8990e307 | 260 | #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
79072805 | 261 | cx->cx_type = t, \ |
3280af22 NIS |
262 | cx->blk_oldsp = sp - PL_stack_base, \ |
263 | cx->blk_oldcop = PL_curcop, \ | |
1aff0e91 | 264 | cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ |
3280af22 | 265 | cx->blk_oldscopesp = PL_scopestack_ix, \ |
1aff0e91 | 266 | cx->blk_oldretsp = PL_retstack_ix, \ |
3280af22 | 267 | cx->blk_oldpm = PL_curpm, \ |
79072805 | 268 | cx->blk_gimme = gimme; \ |
bf49b057 | 269 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \ |
1aff0e91 | 270 | (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); ) |
79072805 LW |
271 | |
272 | /* Exit a block (RETURN and LAST). */ | |
a0d0e21e | 273 | #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ |
1aff0e91 | 274 | newsp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
275 | PL_curcop = cx->blk_oldcop, \ |
276 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ | |
277 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
278 | PL_retstack_ix = cx->blk_oldretsp, \ | |
279 | pm = cx->blk_oldpm, \ | |
280 | gimme = cx->blk_gimme; \ | |
bf49b057 | 281 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \ |
22c35a8c | 282 | (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); ) |
79072805 LW |
283 | |
284 | /* Continue a block elsewhere (NEXT and REDO). */ | |
3280af22 | 285 | #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ |
1aff0e91 | 286 | PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
287 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
288 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
2158dd9b GS |
289 | PL_retstack_ix = cx->blk_oldretsp, \ |
290 | PL_curpm = cx->blk_oldpm | |
79072805 LW |
291 | |
292 | /* substitution context */ | |
293 | struct subst { | |
294 | I32 sbu_iters; | |
295 | I32 sbu_maxiters; | |
22e551b9 | 296 | I32 sbu_rflags; |
4633a7c4 | 297 | I32 sbu_oldsave; |
71be2cbc | 298 | bool sbu_once; |
299 | bool sbu_rxtainted; | |
79072805 LW |
300 | char * sbu_orig; |
301 | SV * sbu_dstr; | |
302 | SV * sbu_targ; | |
303 | char * sbu_s; | |
304 | char * sbu_m; | |
305 | char * sbu_strend; | |
c90c0ff4 | 306 | void * sbu_rxres; |
c07a80fd | 307 | REGEXP * sbu_rx; |
79072805 LW |
308 | }; |
309 | #define sb_iters cx_u.cx_subst.sbu_iters | |
310 | #define sb_maxiters cx_u.cx_subst.sbu_maxiters | |
22e551b9 | 311 | #define sb_rflags cx_u.cx_subst.sbu_rflags |
4633a7c4 | 312 | #define sb_oldsave cx_u.cx_subst.sbu_oldsave |
71be2cbc | 313 | #define sb_once cx_u.cx_subst.sbu_once |
314 | #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted | |
79072805 LW |
315 | #define sb_orig cx_u.cx_subst.sbu_orig |
316 | #define sb_dstr cx_u.cx_subst.sbu_dstr | |
317 | #define sb_targ cx_u.cx_subst.sbu_targ | |
318 | #define sb_s cx_u.cx_subst.sbu_s | |
319 | #define sb_m cx_u.cx_subst.sbu_m | |
320 | #define sb_strend cx_u.cx_subst.sbu_strend | |
c90c0ff4 | 321 | #define sb_rxres cx_u.cx_subst.sbu_rxres |
c07a80fd | 322 | #define sb_rx cx_u.cx_subst.sbu_rx |
79072805 LW |
323 | |
324 | #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ | |
325 | cx->sb_iters = iters, \ | |
326 | cx->sb_maxiters = maxiters, \ | |
22e551b9 | 327 | cx->sb_rflags = r_flags, \ |
4633a7c4 | 328 | cx->sb_oldsave = oldsave, \ |
71be2cbc | 329 | cx->sb_once = once, \ |
330 | cx->sb_rxtainted = rxtainted, \ | |
79072805 LW |
331 | cx->sb_orig = orig, \ |
332 | cx->sb_dstr = dstr, \ | |
333 | cx->sb_targ = targ, \ | |
334 | cx->sb_s = s, \ | |
335 | cx->sb_m = m, \ | |
336 | cx->sb_strend = strend, \ | |
c90c0ff4 | 337 | cx->sb_rxres = Null(void*), \ |
c07a80fd | 338 | cx->sb_rx = rx, \ |
c90c0ff4 | 339 | cx->cx_type = CXt_SUBST; \ |
340 | rxres_save(&cx->sb_rxres, rx) | |
79072805 | 341 | |
c90c0ff4 | 342 | #define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ |
343 | rxres_free(&cx->sb_rxres) | |
79072805 LW |
344 | |
345 | struct context { | |
6b35e009 | 346 | U32 cx_type; /* what kind of context this is */ |
79072805 LW |
347 | union { |
348 | struct block cx_blk; | |
349 | struct subst cx_subst; | |
350 | } cx_u; | |
351 | }; | |
6b35e009 GS |
352 | |
353 | #define CXTYPEMASK 0xff | |
79072805 LW |
354 | #define CXt_NULL 0 |
355 | #define CXt_SUB 1 | |
356 | #define CXt_EVAL 2 | |
357 | #define CXt_LOOP 3 | |
358 | #define CXt_SUBST 4 | |
359 | #define CXt_BLOCK 5 | |
7766f137 | 360 | #define CXt_FORMAT 6 |
79072805 | 361 | |
6b35e009 GS |
362 | /* private flags for CXt_EVAL */ |
363 | #define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */ | |
1d76a5c3 | 364 | #define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */ |
6b35e009 | 365 | |
7766f137 GS |
366 | #ifdef USE_ITHREADS |
367 | /* private flags for CXt_LOOP */ | |
368 | # define CXp_PADVAR 0x00000100 /* itervar lives on pad, iterdata | |
369 | has pad offset; if not set, | |
370 | iterdata holds GV* */ | |
371 | # define CxPADLOOP(c) (((c)->cx_type & (CXt_LOOP|CXp_PADVAR)) \ | |
372 | == (CXt_LOOP|CXp_PADVAR)) | |
373 | #endif | |
374 | ||
6b35e009 | 375 | #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK) |
7766f137 GS |
376 | #define CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL|CXp_REAL)) \ |
377 | == (CXt_EVAL|CXp_REAL)) | |
1d76a5c3 GS |
378 | #define CxTRYBLOCK(c) (((c)->cx_type & (CXt_EVAL|CXp_TRYBLOCK)) \ |
379 | == (CXt_EVAL|CXp_TRYBLOCK)) | |
6b35e009 | 380 | |
79072805 LW |
381 | #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) |
382 | ||
383 | /* "gimme" values */ | |
954c1994 GS |
384 | |
385 | /* | |
386 | =for apidoc AmU||G_SCALAR | |
387 | Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and | |
388 | L<perlcall>. | |
389 | ||
390 | =for apidoc AmU||G_ARRAY | |
391 | Used to indicate array context. See C<GIMME_V>, C<GIMME> and | |
392 | L<perlcall>. | |
393 | ||
394 | =for apidoc AmU||G_VOID | |
395 | Used to indicate void context. See C<GIMME_V> and L<perlcall>. | |
396 | ||
397 | =for apidoc AmU||G_DISCARD | |
398 | Indicates that arguments returned from a callback should be discarded. See | |
399 | L<perlcall>. | |
400 | ||
401 | =for apidoc AmU||G_EVAL | |
402 | ||
403 | Used to force a Perl C<eval> wrapper around a callback. See | |
404 | L<perlcall>. | |
405 | ||
406 | =for apidoc AmU||G_NOARGS | |
407 | ||
408 | Indicates that no arguments are being sent to a callback. See | |
409 | L<perlcall>. | |
410 | ||
411 | =cut | |
412 | */ | |
413 | ||
a0d0e21e LW |
414 | #define G_SCALAR 0 |
415 | #define G_ARRAY 1 | |
54310121 | 416 | #define G_VOID 128 /* skip this bit when adding flags below */ |
79072805 | 417 | |
864dbfa3 | 418 | /* extra flags for Perl_call_* routines */ |
a0d0e21e LW |
419 | #define G_DISCARD 2 /* Call FREETMPS. */ |
420 | #define G_EVAL 4 /* Assume eval {} around subroutine call. */ | |
421 | #define G_NOARGS 8 /* Don't construct a @_ array. */ | |
54310121 | 422 | #define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */ |
491527d0 | 423 | #define G_NODEBUG 32 /* Disable debugging at toplevel. */ |
e336de0d | 424 | |
faef0170 HS |
425 | /* flag bits for PL_in_eval */ |
426 | #define EVAL_NULL 0 /* not in an eval */ | |
427 | #define EVAL_INEVAL 1 /* some enclosing scope is an eval */ | |
428 | #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */ | |
864dbfa3 | 429 | #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */ |
faef0170 | 430 | |
e336de0d GS |
431 | /* Support for switching (stack and block) contexts. |
432 | * This ensures magic doesn't invalidate local stack and cx pointers. | |
433 | */ | |
434 | ||
e788e7d3 GS |
435 | #define PERLSI_UNKNOWN -1 |
436 | #define PERLSI_UNDEF 0 | |
437 | #define PERLSI_MAIN 1 | |
438 | #define PERLSI_MAGIC 2 | |
439 | #define PERLSI_SORT 3 | |
440 | #define PERLSI_SIGNAL 4 | |
441 | #define PERLSI_OVERLOAD 5 | |
442 | #define PERLSI_DESTROY 6 | |
443 | #define PERLSI_WARNHOOK 7 | |
444 | #define PERLSI_DIEHOOK 8 | |
445 | #define PERLSI_REQUIRE 9 | |
e336de0d GS |
446 | |
447 | struct stackinfo { | |
448 | AV * si_stack; /* stack for current runlevel */ | |
449 | PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ | |
450 | I32 si_cxix; /* current context index */ | |
451 | I32 si_cxmax; /* maximum allocated index */ | |
452 | I32 si_type; /* type of runlevel */ | |
453 | struct stackinfo * si_prev; | |
454 | struct stackinfo * si_next; | |
ce2f7c3b | 455 | I32 si_markoff; /* offset where markstack begins for us. |
e336de0d GS |
456 | * currently used only with DEBUGGING, |
457 | * but not #ifdef-ed for bincompat */ | |
458 | }; | |
459 | ||
460 | typedef struct stackinfo PERL_SI; | |
461 | ||
3280af22 NIS |
462 | #define cxstack (PL_curstackinfo->si_cxstack) |
463 | #define cxstack_ix (PL_curstackinfo->si_cxix) | |
464 | #define cxstack_max (PL_curstackinfo->si_cxmax) | |
e336de0d GS |
465 | |
466 | #ifdef DEBUGGING | |
ce2f7c3b GS |
467 | # define SET_MARK_OFFSET \ |
468 | PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack | |
e336de0d | 469 | #else |
ce2f7c3b | 470 | # define SET_MARK_OFFSET NOOP |
e336de0d GS |
471 | #endif |
472 | ||
d3acc0f7 | 473 | #define PUSHSTACKi(type) \ |
e336de0d | 474 | STMT_START { \ |
3280af22 | 475 | PERL_SI *next = PL_curstackinfo->si_next; \ |
e336de0d GS |
476 | if (!next) { \ |
477 | next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ | |
3280af22 NIS |
478 | next->si_prev = PL_curstackinfo; \ |
479 | PL_curstackinfo->si_next = next; \ | |
e336de0d GS |
480 | } \ |
481 | next->si_type = type; \ | |
482 | next->si_cxix = -1; \ | |
483 | AvFILLp(next->si_stack) = 0; \ | |
3280af22 NIS |
484 | SWITCHSTACK(PL_curstack,next->si_stack); \ |
485 | PL_curstackinfo = next; \ | |
ce2f7c3b | 486 | SET_MARK_OFFSET; \ |
e336de0d GS |
487 | } STMT_END |
488 | ||
e788e7d3 | 489 | #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) |
d3acc0f7 | 490 | |
3095d977 GS |
491 | /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by |
492 | * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */ | |
d3acc0f7 | 493 | #define POPSTACK \ |
e336de0d | 494 | STMT_START { \ |
de616352 | 495 | djSP; \ |
3280af22 | 496 | PERL_SI *prev = PL_curstackinfo->si_prev; \ |
e336de0d | 497 | if (!prev) { \ |
bf49b057 | 498 | PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ |
e336de0d GS |
499 | my_exit(1); \ |
500 | } \ | |
3280af22 | 501 | SWITCHSTACK(PL_curstack,prev->si_stack); \ |
e336de0d | 502 | /* don't free prev here, free them all at the END{} */ \ |
3280af22 | 503 | PL_curstackinfo = prev; \ |
e336de0d GS |
504 | } STMT_END |
505 | ||
506 | #define POPSTACK_TO(s) \ | |
507 | STMT_START { \ | |
3280af22 | 508 | while (PL_curstack != s) { \ |
bac4b2ad | 509 | dounwind(-1); \ |
d3acc0f7 | 510 | POPSTACK; \ |
bac4b2ad | 511 | } \ |
e336de0d | 512 | } STMT_END |