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) | |
f4dd75d9 | 32 | # define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) |
57843af0 GS |
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) |
f4dd75d9 | 38 | # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savepv(pv)) |
11faa288 GS |
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)) | |
f4dd75d9 | 42 | # define CopSTASH_eq(c,hv) ((hv) \ |
ed094faf GS |
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) | |
f4dd75d9 GS |
48 | # define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv)) |
49 | # define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv)) | |
57843af0 GS |
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) | |
f4dd75d9 | 54 | # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) |
57843af0 | 55 | # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch) |
f4dd75d9 GS |
56 | /* cop_stash is not refcounted */ |
57 | # define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD)) | |
58 | # define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv)) | |
57843af0 GS |
59 | #endif /* USE_ITHREADS */ |
60 | ||
ed094faf | 61 | #define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv)) |
cc49e20b | 62 | #define CopLINE(c) ((c)->cop_line) |
57843af0 GS |
63 | #define CopLINE_inc(c) (++CopLINE(c)) |
64 | #define CopLINE_dec(c) (--CopLINE(c)) | |
65 | #define CopLINE_set(c,l) (CopLINE(c) = (l)) | |
cc49e20b | 66 | |
79072805 LW |
67 | /* |
68 | * Here we have some enormously heavy (or at least ponderous) wizardry. | |
69 | */ | |
70 | ||
71 | /* subroutine context */ | |
72 | struct block_sub { | |
73 | CV * cv; | |
74 | GV * gv; | |
463ee0b2 | 75 | GV * dfoutgv; |
6d4ff0d2 | 76 | #ifndef USE_THREADS |
79072805 | 77 | AV * savearray; |
6d4ff0d2 | 78 | #endif /* USE_THREADS */ |
79072805 LW |
79 | AV * argarray; |
80 | U16 olddepth; | |
81 | U8 hasargs; | |
cd06dffe | 82 | U8 lval; /* XXX merge lval and hasargs? */ |
79072805 LW |
83 | }; |
84 | ||
85 | #define PUSHSUB(cx) \ | |
86 | cx->blk_sub.cv = cv; \ | |
79072805 | 87 | cx->blk_sub.olddepth = CvDEPTH(cv); \ |
cd06dffe GS |
88 | cx->blk_sub.hasargs = hasargs; \ |
89 | cx->blk_sub.lval = PL_op->op_private & \ | |
90 | (OPpLVAL_INTRO|OPpENTERSUB_INARGS); | |
79072805 LW |
91 | |
92 | #define PUSHFORMAT(cx) \ | |
93 | cx->blk_sub.cv = cv; \ | |
94 | cx->blk_sub.gv = gv; \ | |
4633a7c4 | 95 | cx->blk_sub.hasargs = 0; \ |
3280af22 | 96 | cx->blk_sub.dfoutgv = PL_defoutgv; \ |
4633a7c4 | 97 | (void)SvREFCNT_inc(cx->blk_sub.dfoutgv) |
79072805 | 98 | |
6d4ff0d2 | 99 | #ifdef USE_THREADS |
7766f137 | 100 | # define POP_SAVEARRAY() NOOP |
6d4ff0d2 | 101 | #else |
7766f137 | 102 | # define POP_SAVEARRAY() \ |
6d4ff0d2 | 103 | STMT_START { \ |
3280af22 | 104 | SvREFCNT_dec(GvAV(PL_defgv)); \ |
a8bba7fa | 105 | GvAV(PL_defgv) = cx->blk_sub.savearray; \ |
6d4ff0d2 MB |
106 | } STMT_END |
107 | #endif /* USE_THREADS */ | |
108 | ||
7766f137 GS |
109 | #ifdef USE_ITHREADS |
110 | /* junk in @_ spells trouble when cloning CVs, so don't leave any */ | |
111 | # define CLEAR_ARGARRAY() av_clear(cx->blk_sub.argarray) | |
112 | #else | |
113 | # define CLEAR_ARGARRAY() NOOP | |
114 | #endif /* USE_ITHREADS */ | |
115 | ||
116 | ||
b0d9ce38 GS |
117 | #define POPSUB(cx,sv) \ |
118 | STMT_START { \ | |
a8bba7fa | 119 | if (cx->blk_sub.hasargs) { \ |
7766f137 | 120 | POP_SAVEARRAY(); \ |
d8b46c1b | 121 | /* abandon @_ if it got reified */ \ |
a8bba7fa GS |
122 | if (AvREAL(cx->blk_sub.argarray)) { \ |
123 | SSize_t fill = AvFILLp(cx->blk_sub.argarray); \ | |
124 | SvREFCNT_dec(cx->blk_sub.argarray); \ | |
125 | cx->blk_sub.argarray = newAV(); \ | |
126 | av_extend(cx->blk_sub.argarray, fill); \ | |
127 | AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \ | |
128 | PL_curpad[0] = (SV*)cx->blk_sub.argarray; \ | |
d8b46c1b | 129 | } \ |
7766f137 GS |
130 | else { \ |
131 | CLEAR_ARGARRAY(); \ | |
132 | } \ | |
79072805 | 133 | } \ |
b0d9ce38 GS |
134 | sv = (SV*)cx->blk_sub.cv; \ |
135 | if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \ | |
136 | sv = Nullsv; \ | |
137 | } STMT_END | |
138 | ||
139 | #define LEAVESUB(sv) \ | |
140 | STMT_START { \ | |
141 | if (sv) \ | |
142 | SvREFCNT_dec(sv); \ | |
143 | } STMT_END | |
79072805 LW |
144 | |
145 | #define POPFORMAT(cx) \ | |
4633a7c4 LW |
146 | setdefout(cx->blk_sub.dfoutgv); \ |
147 | SvREFCNT_dec(cx->blk_sub.dfoutgv); | |
79072805 LW |
148 | |
149 | /* eval context */ | |
150 | struct block_eval { | |
151 | I32 old_in_eval; | |
152 | I32 old_op_type; | |
0f79a09d | 153 | SV * old_namesv; |
79072805 | 154 | OP * old_eval_root; |
748a9306 | 155 | SV * cur_text; |
79072805 LW |
156 | }; |
157 | ||
8990e307 | 158 | #define PUSHEVAL(cx,n,fgv) \ |
0f79a09d | 159 | STMT_START { \ |
3280af22 | 160 | cx->blk_eval.old_in_eval = PL_in_eval; \ |
a8bba7fa | 161 | cx->blk_eval.old_op_type = PL_op->op_type; \ |
0f79a09d | 162 | cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : Nullsv); \ |
a8bba7fa | 163 | cx->blk_eval.old_eval_root = PL_eval_root; \ |
0f79a09d GS |
164 | cx->blk_eval.cur_text = PL_linestr; \ |
165 | } STMT_END | |
79072805 LW |
166 | |
167 | #define POPEVAL(cx) \ | |
0f79a09d | 168 | STMT_START { \ |
3280af22 | 169 | PL_in_eval = cx->blk_eval.old_in_eval; \ |
79072805 | 170 | optype = cx->blk_eval.old_op_type; \ |
7766f137 | 171 | PL_eval_root = cx->blk_eval.old_eval_root; \ |
0f79a09d GS |
172 | if (cx->blk_eval.old_namesv) \ |
173 | sv_2mortal(cx->blk_eval.old_namesv); \ | |
174 | } STMT_END | |
79072805 LW |
175 | |
176 | /* loop context */ | |
177 | struct block_loop { | |
178 | char * label; | |
179 | I32 resetsp; | |
180 | OP * redo_op; | |
181 | OP * next_op; | |
182 | OP * last_op; | |
7766f137 GS |
183 | #ifdef USE_ITHREADS |
184 | void * iterdata; | |
9e509370 | 185 | SV ** oldcurpad; |
7766f137 | 186 | #else |
79072805 | 187 | SV ** itervar; |
7766f137 | 188 | #endif |
79072805 | 189 | SV * itersave; |
5f05dabc | 190 | SV * iterlval; |
79072805 | 191 | AV * iterary; |
89ea2908 GA |
192 | IV iterix; |
193 | IV itermax; | |
79072805 LW |
194 | }; |
195 | ||
7766f137 GS |
196 | #ifdef USE_ITHREADS |
197 | # define CxITERVAR(c) \ | |
198 | ((c)->blk_loop.iterdata \ | |
199 | ? (CxPADLOOP(cx) \ | |
9e509370 | 200 | ? &((c)->blk_loop.oldcurpad)[(PADOFFSET)(c)->blk_loop.iterdata] \ |
7766f137 GS |
201 | : &GvSV((GV*)(c)->blk_loop.iterdata)) \ |
202 | : (SV**)NULL) | |
203 | # define CX_ITERDATA_SET(cx,idata) \ | |
9e509370 | 204 | cx->blk_loop.oldcurpad = PL_curpad; \ |
155aba94 | 205 | if ((cx->blk_loop.iterdata = (idata))) \ |
7766f137 GS |
206 | cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); |
207 | #else | |
208 | # define CxITERVAR(c) ((c)->blk_loop.itervar) | |
209 | # define CX_ITERDATA_SET(cx,ivar) \ | |
155aba94 | 210 | if ((cx->blk_loop.itervar = (SV**)(ivar))) \ |
7766f137 GS |
211 | cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); |
212 | #endif | |
213 | ||
214 | #define PUSHLOOP(cx, dat, s) \ | |
38a230cb GS |
215 | cx->blk_loop.label = PL_curcop->cop_label; \ |
216 | cx->blk_loop.resetsp = s - PL_stack_base; \ | |
79072805 LW |
217 | cx->blk_loop.redo_op = cLOOP->op_redoop; \ |
218 | cx->blk_loop.next_op = cLOOP->op_nextop; \ | |
219 | cx->blk_loop.last_op = cLOOP->op_lastop; \ | |
44a8e56a | 220 | cx->blk_loop.iterlval = Nullsv; \ |
221 | cx->blk_loop.iterary = Nullav; \ | |
7766f137 GS |
222 | cx->blk_loop.iterix = -1; \ |
223 | CX_ITERDATA_SET(cx,dat); | |
79072805 LW |
224 | |
225 | #define POPLOOP(cx) \ | |
a8bba7fa | 226 | SvREFCNT_dec(cx->blk_loop.iterlval); \ |
7766f137 GS |
227 | if (CxITERVAR(cx)) { \ |
228 | SV **s_v_p = CxITERVAR(cx); \ | |
229 | sv_2mortal(*s_v_p); \ | |
230 | *s_v_p = cx->blk_loop.itersave; \ | |
44a8e56a | 231 | } \ |
a8bba7fa GS |
232 | if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\ |
233 | SvREFCNT_dec(cx->blk_loop.iterary); | |
79072805 LW |
234 | |
235 | /* context common to subroutines, evals and loops */ | |
236 | struct block { | |
237 | I32 blku_oldsp; /* stack pointer to copy stuff down to */ | |
238 | COP * blku_oldcop; /* old curcop pointer */ | |
239 | I32 blku_oldretsp; /* return stack index */ | |
240 | I32 blku_oldmarksp; /* mark stack index */ | |
241 | I32 blku_oldscopesp; /* scope stack index */ | |
242 | PMOP * blku_oldpm; /* values of pattern match vars */ | |
243 | U8 blku_gimme; /* is this block running in list context? */ | |
244 | ||
245 | union { | |
246 | struct block_sub blku_sub; | |
247 | struct block_eval blku_eval; | |
248 | struct block_loop blku_loop; | |
249 | } blk_u; | |
250 | }; | |
251 | #define blk_oldsp cx_u.cx_blk.blku_oldsp | |
252 | #define blk_oldcop cx_u.cx_blk.blku_oldcop | |
253 | #define blk_oldretsp cx_u.cx_blk.blku_oldretsp | |
254 | #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp | |
255 | #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp | |
256 | #define blk_oldpm cx_u.cx_blk.blku_oldpm | |
257 | #define blk_gimme cx_u.cx_blk.blku_gimme | |
258 | #define blk_sub cx_u.cx_blk.blk_u.blku_sub | |
259 | #define blk_eval cx_u.cx_blk.blk_u.blku_eval | |
260 | #define blk_loop cx_u.cx_blk.blk_u.blku_loop | |
261 | ||
262 | /* Enter a block. */ | |
8990e307 | 263 | #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
79072805 | 264 | cx->cx_type = t, \ |
3280af22 NIS |
265 | cx->blk_oldsp = sp - PL_stack_base, \ |
266 | cx->blk_oldcop = PL_curcop, \ | |
1aff0e91 | 267 | cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ |
3280af22 | 268 | cx->blk_oldscopesp = PL_scopestack_ix, \ |
1aff0e91 | 269 | cx->blk_oldretsp = PL_retstack_ix, \ |
3280af22 | 270 | cx->blk_oldpm = PL_curpm, \ |
79072805 | 271 | cx->blk_gimme = gimme; \ |
bf49b057 | 272 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \ |
1aff0e91 | 273 | (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); ) |
79072805 LW |
274 | |
275 | /* Exit a block (RETURN and LAST). */ | |
a0d0e21e | 276 | #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ |
1aff0e91 | 277 | newsp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
278 | PL_curcop = cx->blk_oldcop, \ |
279 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ | |
280 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
281 | PL_retstack_ix = cx->blk_oldretsp, \ | |
282 | pm = cx->blk_oldpm, \ | |
283 | gimme = cx->blk_gimme; \ | |
bf49b057 | 284 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \ |
22c35a8c | 285 | (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); ) |
79072805 LW |
286 | |
287 | /* Continue a block elsewhere (NEXT and REDO). */ | |
3280af22 | 288 | #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ |
1aff0e91 | 289 | PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 NIS |
290 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
291 | PL_scopestack_ix = cx->blk_oldscopesp, \ | |
2158dd9b GS |
292 | PL_retstack_ix = cx->blk_oldretsp, \ |
293 | PL_curpm = cx->blk_oldpm | |
79072805 LW |
294 | |
295 | /* substitution context */ | |
296 | struct subst { | |
297 | I32 sbu_iters; | |
298 | I32 sbu_maxiters; | |
22e551b9 | 299 | I32 sbu_rflags; |
4633a7c4 | 300 | I32 sbu_oldsave; |
71be2cbc | 301 | bool sbu_once; |
302 | bool sbu_rxtainted; | |
79072805 LW |
303 | char * sbu_orig; |
304 | SV * sbu_dstr; | |
305 | SV * sbu_targ; | |
306 | char * sbu_s; | |
307 | char * sbu_m; | |
308 | char * sbu_strend; | |
c90c0ff4 | 309 | void * sbu_rxres; |
c07a80fd | 310 | REGEXP * sbu_rx; |
79072805 LW |
311 | }; |
312 | #define sb_iters cx_u.cx_subst.sbu_iters | |
313 | #define sb_maxiters cx_u.cx_subst.sbu_maxiters | |
22e551b9 | 314 | #define sb_rflags cx_u.cx_subst.sbu_rflags |
4633a7c4 | 315 | #define sb_oldsave cx_u.cx_subst.sbu_oldsave |
71be2cbc | 316 | #define sb_once cx_u.cx_subst.sbu_once |
317 | #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted | |
79072805 LW |
318 | #define sb_orig cx_u.cx_subst.sbu_orig |
319 | #define sb_dstr cx_u.cx_subst.sbu_dstr | |
320 | #define sb_targ cx_u.cx_subst.sbu_targ | |
321 | #define sb_s cx_u.cx_subst.sbu_s | |
322 | #define sb_m cx_u.cx_subst.sbu_m | |
323 | #define sb_strend cx_u.cx_subst.sbu_strend | |
c90c0ff4 | 324 | #define sb_rxres cx_u.cx_subst.sbu_rxres |
c07a80fd | 325 | #define sb_rx cx_u.cx_subst.sbu_rx |
79072805 LW |
326 | |
327 | #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ | |
328 | cx->sb_iters = iters, \ | |
329 | cx->sb_maxiters = maxiters, \ | |
22e551b9 | 330 | cx->sb_rflags = r_flags, \ |
4633a7c4 | 331 | cx->sb_oldsave = oldsave, \ |
71be2cbc | 332 | cx->sb_once = once, \ |
333 | cx->sb_rxtainted = rxtainted, \ | |
79072805 LW |
334 | cx->sb_orig = orig, \ |
335 | cx->sb_dstr = dstr, \ | |
336 | cx->sb_targ = targ, \ | |
337 | cx->sb_s = s, \ | |
338 | cx->sb_m = m, \ | |
339 | cx->sb_strend = strend, \ | |
c90c0ff4 | 340 | cx->sb_rxres = Null(void*), \ |
c07a80fd | 341 | cx->sb_rx = rx, \ |
c90c0ff4 | 342 | cx->cx_type = CXt_SUBST; \ |
343 | rxres_save(&cx->sb_rxres, rx) | |
79072805 | 344 | |
c90c0ff4 | 345 | #define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ |
346 | rxres_free(&cx->sb_rxres) | |
79072805 LW |
347 | |
348 | struct context { | |
6b35e009 | 349 | U32 cx_type; /* what kind of context this is */ |
79072805 LW |
350 | union { |
351 | struct block cx_blk; | |
352 | struct subst cx_subst; | |
353 | } cx_u; | |
354 | }; | |
6b35e009 GS |
355 | |
356 | #define CXTYPEMASK 0xff | |
79072805 LW |
357 | #define CXt_NULL 0 |
358 | #define CXt_SUB 1 | |
359 | #define CXt_EVAL 2 | |
360 | #define CXt_LOOP 3 | |
361 | #define CXt_SUBST 4 | |
362 | #define CXt_BLOCK 5 | |
7766f137 | 363 | #define CXt_FORMAT 6 |
79072805 | 364 | |
6b35e009 GS |
365 | /* private flags for CXt_EVAL */ |
366 | #define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */ | |
1d76a5c3 | 367 | #define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */ |
6b35e009 | 368 | |
7766f137 GS |
369 | #ifdef USE_ITHREADS |
370 | /* private flags for CXt_LOOP */ | |
371 | # define CXp_PADVAR 0x00000100 /* itervar lives on pad, iterdata | |
372 | has pad offset; if not set, | |
373 | iterdata holds GV* */ | |
374 | # define CxPADLOOP(c) (((c)->cx_type & (CXt_LOOP|CXp_PADVAR)) \ | |
375 | == (CXt_LOOP|CXp_PADVAR)) | |
376 | #endif | |
377 | ||
6b35e009 | 378 | #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK) |
7766f137 GS |
379 | #define CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL|CXp_REAL)) \ |
380 | == (CXt_EVAL|CXp_REAL)) | |
1d76a5c3 GS |
381 | #define CxTRYBLOCK(c) (((c)->cx_type & (CXt_EVAL|CXp_TRYBLOCK)) \ |
382 | == (CXt_EVAL|CXp_TRYBLOCK)) | |
6b35e009 | 383 | |
79072805 LW |
384 | #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) |
385 | ||
386 | /* "gimme" values */ | |
954c1994 GS |
387 | |
388 | /* | |
389 | =for apidoc AmU||G_SCALAR | |
390 | Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and | |
391 | L<perlcall>. | |
392 | ||
393 | =for apidoc AmU||G_ARRAY | |
394 | Used to indicate array context. See C<GIMME_V>, C<GIMME> and | |
395 | L<perlcall>. | |
396 | ||
397 | =for apidoc AmU||G_VOID | |
398 | Used to indicate void context. See C<GIMME_V> and L<perlcall>. | |
399 | ||
400 | =for apidoc AmU||G_DISCARD | |
401 | Indicates that arguments returned from a callback should be discarded. See | |
402 | L<perlcall>. | |
403 | ||
404 | =for apidoc AmU||G_EVAL | |
405 | ||
406 | Used to force a Perl C<eval> wrapper around a callback. See | |
407 | L<perlcall>. | |
408 | ||
409 | =for apidoc AmU||G_NOARGS | |
410 | ||
411 | Indicates that no arguments are being sent to a callback. See | |
412 | L<perlcall>. | |
413 | ||
414 | =cut | |
415 | */ | |
416 | ||
a0d0e21e LW |
417 | #define G_SCALAR 0 |
418 | #define G_ARRAY 1 | |
54310121 | 419 | #define G_VOID 128 /* skip this bit when adding flags below */ |
79072805 | 420 | |
864dbfa3 | 421 | /* extra flags for Perl_call_* routines */ |
a0d0e21e LW |
422 | #define G_DISCARD 2 /* Call FREETMPS. */ |
423 | #define G_EVAL 4 /* Assume eval {} around subroutine call. */ | |
424 | #define G_NOARGS 8 /* Don't construct a @_ array. */ | |
54310121 | 425 | #define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */ |
491527d0 | 426 | #define G_NODEBUG 32 /* Disable debugging at toplevel. */ |
968b3946 | 427 | #define G_METHOD 64 /* Calling method. */ |
e336de0d | 428 | |
faef0170 HS |
429 | /* flag bits for PL_in_eval */ |
430 | #define EVAL_NULL 0 /* not in an eval */ | |
431 | #define EVAL_INEVAL 1 /* some enclosing scope is an eval */ | |
432 | #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */ | |
864dbfa3 | 433 | #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */ |
faef0170 | 434 | |
e336de0d GS |
435 | /* Support for switching (stack and block) contexts. |
436 | * This ensures magic doesn't invalidate local stack and cx pointers. | |
437 | */ | |
438 | ||
e788e7d3 GS |
439 | #define PERLSI_UNKNOWN -1 |
440 | #define PERLSI_UNDEF 0 | |
441 | #define PERLSI_MAIN 1 | |
442 | #define PERLSI_MAGIC 2 | |
443 | #define PERLSI_SORT 3 | |
444 | #define PERLSI_SIGNAL 4 | |
445 | #define PERLSI_OVERLOAD 5 | |
446 | #define PERLSI_DESTROY 6 | |
447 | #define PERLSI_WARNHOOK 7 | |
448 | #define PERLSI_DIEHOOK 8 | |
449 | #define PERLSI_REQUIRE 9 | |
e336de0d GS |
450 | |
451 | struct stackinfo { | |
452 | AV * si_stack; /* stack for current runlevel */ | |
453 | PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ | |
454 | I32 si_cxix; /* current context index */ | |
455 | I32 si_cxmax; /* maximum allocated index */ | |
456 | I32 si_type; /* type of runlevel */ | |
457 | struct stackinfo * si_prev; | |
458 | struct stackinfo * si_next; | |
ce2f7c3b | 459 | I32 si_markoff; /* offset where markstack begins for us. |
e336de0d GS |
460 | * currently used only with DEBUGGING, |
461 | * but not #ifdef-ed for bincompat */ | |
462 | }; | |
463 | ||
464 | typedef struct stackinfo PERL_SI; | |
465 | ||
3280af22 NIS |
466 | #define cxstack (PL_curstackinfo->si_cxstack) |
467 | #define cxstack_ix (PL_curstackinfo->si_cxix) | |
468 | #define cxstack_max (PL_curstackinfo->si_cxmax) | |
e336de0d GS |
469 | |
470 | #ifdef DEBUGGING | |
ce2f7c3b GS |
471 | # define SET_MARK_OFFSET \ |
472 | PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack | |
e336de0d | 473 | #else |
ce2f7c3b | 474 | # define SET_MARK_OFFSET NOOP |
e336de0d GS |
475 | #endif |
476 | ||
d3acc0f7 | 477 | #define PUSHSTACKi(type) \ |
e336de0d | 478 | STMT_START { \ |
3280af22 | 479 | PERL_SI *next = PL_curstackinfo->si_next; \ |
e336de0d GS |
480 | if (!next) { \ |
481 | next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ | |
3280af22 NIS |
482 | next->si_prev = PL_curstackinfo; \ |
483 | PL_curstackinfo->si_next = next; \ | |
e336de0d GS |
484 | } \ |
485 | next->si_type = type; \ | |
486 | next->si_cxix = -1; \ | |
487 | AvFILLp(next->si_stack) = 0; \ | |
3280af22 NIS |
488 | SWITCHSTACK(PL_curstack,next->si_stack); \ |
489 | PL_curstackinfo = next; \ | |
ce2f7c3b | 490 | SET_MARK_OFFSET; \ |
e336de0d GS |
491 | } STMT_END |
492 | ||
e788e7d3 | 493 | #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) |
d3acc0f7 | 494 | |
3095d977 GS |
495 | /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by |
496 | * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */ | |
d3acc0f7 | 497 | #define POPSTACK \ |
e336de0d | 498 | STMT_START { \ |
de616352 | 499 | djSP; \ |
3280af22 | 500 | PERL_SI *prev = PL_curstackinfo->si_prev; \ |
e336de0d | 501 | if (!prev) { \ |
bf49b057 | 502 | PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ |
e336de0d GS |
503 | my_exit(1); \ |
504 | } \ | |
3280af22 | 505 | SWITCHSTACK(PL_curstack,prev->si_stack); \ |
e336de0d | 506 | /* don't free prev here, free them all at the END{} */ \ |
3280af22 | 507 | PL_curstackinfo = prev; \ |
e336de0d GS |
508 | } STMT_END |
509 | ||
510 | #define POPSTACK_TO(s) \ | |
511 | STMT_START { \ | |
3280af22 | 512 | while (PL_curstack != s) { \ |
bac4b2ad | 513 | dounwind(-1); \ |
d3acc0f7 | 514 | POPSTACK; \ |
bac4b2ad | 515 | } \ |
e336de0d | 516 | } STMT_END |