| 1 |
#include "EXTERN.h" |
| 2 |
#include "perl.h" |
| 3 |
#include "XSUB.h" |
| 4 |
|
| 5 |
#if 1 |
| 6 |
# define CHK(x) (void *)0 |
| 7 |
#else |
| 8 |
# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) |
| 9 |
#endif |
| 10 |
|
| 11 |
#define MAY_FLUSH /* increases codesize */ |
| 12 |
|
| 13 |
#define SUB_INIT "Coro::State::initialize" |
| 14 |
|
| 15 |
#define TRANSFER_SAVE_DEFAV 0x00000001 |
| 16 |
#define TRANSFER_SAVE_DEFSV 0x00000002 |
| 17 |
#define TRANSFER_SAVE_ERRSV 0x00000004 |
| 18 |
|
| 19 |
#define TRANSFER_SAVE_ALL -1 |
| 20 |
|
| 21 |
struct coro { |
| 22 |
/* optionally saved, might be zero */ |
| 23 |
AV *defav; |
| 24 |
SV *defsv; |
| 25 |
SV *errsv; |
| 26 |
|
| 27 |
/* saved global state not related to stacks */ |
| 28 |
U8 dowarn; |
| 29 |
|
| 30 |
/* the stacks and related info (callchain etc..) */ |
| 31 |
PERL_SI *curstackinfo; |
| 32 |
AV *curstack; |
| 33 |
AV *mainstack; |
| 34 |
SV **stack_sp; |
| 35 |
OP *op; |
| 36 |
SV **curpad; |
| 37 |
SV **stack_base; |
| 38 |
SV **stack_max; |
| 39 |
SV **tmps_stack; |
| 40 |
I32 tmps_floor; |
| 41 |
I32 tmps_ix; |
| 42 |
I32 tmps_max; |
| 43 |
I32 *markstack; |
| 44 |
I32 *markstack_ptr; |
| 45 |
I32 *markstack_max; |
| 46 |
I32 *scopestack; |
| 47 |
I32 scopestack_ix; |
| 48 |
I32 scopestack_max; |
| 49 |
ANY *savestack; |
| 50 |
I32 savestack_ix; |
| 51 |
I32 savestack_max; |
| 52 |
OP **retstack; |
| 53 |
I32 retstack_ix; |
| 54 |
I32 retstack_max; |
| 55 |
COP *curcop; |
| 56 |
|
| 57 |
/* data associated with this coroutine (initial args) */ |
| 58 |
AV *args; |
| 59 |
}; |
| 60 |
|
| 61 |
typedef struct coro *Coro__State; |
| 62 |
typedef struct coro *Coro__State_or_hashref; |
| 63 |
|
| 64 |
static AV *main_mainstack; /* used to differentiate between $main and others */ |
| 65 |
|
| 66 |
static HV *padlist_cache; |
| 67 |
|
| 68 |
/* mostly copied from op.c:cv_clone2 */ |
| 69 |
STATIC AV * |
| 70 |
clone_padlist (AV *protopadlist) |
| 71 |
{ |
| 72 |
AV *av; |
| 73 |
I32 ix; |
| 74 |
AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); |
| 75 |
AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); |
| 76 |
SV **pname = AvARRAY (protopad_name); |
| 77 |
SV **ppad = AvARRAY (protopad); |
| 78 |
I32 fname = AvFILLp (protopad_name); |
| 79 |
I32 fpad = AvFILLp (protopad); |
| 80 |
AV *newpadlist, *newpad_name, *newpad; |
| 81 |
SV **npad; |
| 82 |
|
| 83 |
newpad_name = newAV (); |
| 84 |
for (ix = fname; ix >= 0; ix--) |
| 85 |
av_store (newpad_name, ix, SvREFCNT_inc (pname[ix])); |
| 86 |
|
| 87 |
newpad = newAV (); |
| 88 |
av_fill (newpad, AvFILLp (protopad)); |
| 89 |
npad = AvARRAY (newpad); |
| 90 |
|
| 91 |
newpadlist = newAV (); |
| 92 |
AvREAL_off (newpadlist); |
| 93 |
av_store (newpadlist, 0, (SV *) newpad_name); |
| 94 |
av_store (newpadlist, 1, (SV *) newpad); |
| 95 |
|
| 96 |
av = newAV (); /* will be @_ */ |
| 97 |
av_extend (av, 0); |
| 98 |
av_store (newpad, 0, (SV *) av); |
| 99 |
AvFLAGS (av) = AVf_REIFY; |
| 100 |
|
| 101 |
for (ix = fpad; ix > 0; ix--) |
| 102 |
{ |
| 103 |
SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; |
| 104 |
if (namesv && namesv != &PL_sv_undef) |
| 105 |
{ |
| 106 |
char *name = SvPVX (namesv); /* XXX */ |
| 107 |
if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') |
| 108 |
{ /* lexical from outside? */ |
| 109 |
npad[ix] = SvREFCNT_inc (ppad[ix]); |
| 110 |
} |
| 111 |
else |
| 112 |
{ /* our own lexical */ |
| 113 |
SV *sv; |
| 114 |
if (*name == '&') |
| 115 |
sv = SvREFCNT_inc (ppad[ix]); |
| 116 |
else if (*name == '@') |
| 117 |
sv = (SV *) newAV (); |
| 118 |
else if (*name == '%') |
| 119 |
sv = (SV *) newHV (); |
| 120 |
else |
| 121 |
sv = NEWSV (0, 0); |
| 122 |
if (!SvPADBUSY (sv)) |
| 123 |
SvPADMY_on (sv); |
| 124 |
npad[ix] = sv; |
| 125 |
} |
| 126 |
} |
| 127 |
else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) |
| 128 |
{ |
| 129 |
npad[ix] = SvREFCNT_inc (ppad[ix]); |
| 130 |
} |
| 131 |
else |
| 132 |
{ |
| 133 |
SV *sv = NEWSV (0, 0); |
| 134 |
SvPADTMP_on (sv); |
| 135 |
npad[ix] = sv; |
| 136 |
} |
| 137 |
} |
| 138 |
|
| 139 |
#if 0 /* return -ENOTUNDERSTOOD */ |
| 140 |
/* Now that vars are all in place, clone nested closures. */ |
| 141 |
|
| 142 |
for (ix = fpad; ix > 0; ix--) { |
| 143 |
SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; |
| 144 |
if (namesv |
| 145 |
&& namesv != &PL_sv_undef |
| 146 |
&& !(SvFLAGS(namesv) & SVf_FAKE) |
| 147 |
&& *SvPVX(namesv) == '&' |
| 148 |
&& CvCLONE(ppad[ix])) |
| 149 |
{ |
| 150 |
CV *kid = cv_clone((CV*)ppad[ix]); |
| 151 |
SvREFCNT_dec(ppad[ix]); |
| 152 |
CvCLONE_on(kid); |
| 153 |
SvPADMY_on(kid); |
| 154 |
npad[ix] = (SV*)kid; |
| 155 |
} |
| 156 |
} |
| 157 |
#endif |
| 158 |
|
| 159 |
return newpadlist; |
| 160 |
} |
| 161 |
|
| 162 |
#ifdef MAY_FLUSH |
| 163 |
STATIC AV * |
| 164 |
free_padlist (AV *padlist) |
| 165 |
{ |
| 166 |
/* may be during global destruction */ |
| 167 |
if (SvREFCNT(padlist)) |
| 168 |
{ |
| 169 |
I32 i = AvFILLp(padlist); |
| 170 |
while (i >= 0) |
| 171 |
{ |
| 172 |
SV **svp = av_fetch(padlist, i--, FALSE); |
| 173 |
SV *sv = svp ? *svp : Nullsv; |
| 174 |
if (sv) |
| 175 |
SvREFCNT_dec(sv); |
| 176 |
} |
| 177 |
|
| 178 |
SvREFCNT_dec((SV*)padlist); |
| 179 |
} |
| 180 |
} |
| 181 |
#endif |
| 182 |
|
| 183 |
/* the next two functions merely cache the padlists */ |
| 184 |
STATIC void |
| 185 |
get_padlist (CV *cv) |
| 186 |
{ |
| 187 |
SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); |
| 188 |
|
| 189 |
if (he && AvFILLp ((AV *)*he) >= 0) |
| 190 |
CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); |
| 191 |
else |
| 192 |
CvPADLIST (cv) = clone_padlist (CvPADLIST (cv)); |
| 193 |
} |
| 194 |
|
| 195 |
STATIC void |
| 196 |
put_padlist (CV *cv) |
| 197 |
{ |
| 198 |
SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1); |
| 199 |
|
| 200 |
if (SvTYPE (*he) != SVt_PVAV) |
| 201 |
{ |
| 202 |
SvREFCNT_dec (*he); |
| 203 |
*he = (SV *)newAV (); |
| 204 |
} |
| 205 |
|
| 206 |
av_push ((AV *)*he, (SV *)CvPADLIST (cv)); |
| 207 |
} |
| 208 |
|
| 209 |
#ifdef MAY_FLUSH |
| 210 |
STATIC void |
| 211 |
flush_padlist_cache () |
| 212 |
{ |
| 213 |
HV *hv = padlist_cache; |
| 214 |
padlist_cache = newHV (); |
| 215 |
|
| 216 |
if (hv_iterinit (hv)) |
| 217 |
{ |
| 218 |
HE *he; |
| 219 |
AV *padlist; |
| 220 |
|
| 221 |
while (!!(he = hv_iternext (hv))) |
| 222 |
{ |
| 223 |
AV *av = (AV *)HeVAL(he); |
| 224 |
|
| 225 |
/* casting is fun. */ |
| 226 |
while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) |
| 227 |
free_padlist (padlist); |
| 228 |
} |
| 229 |
} |
| 230 |
|
| 231 |
SvREFCNT_dec (hv); |
| 232 |
} |
| 233 |
#endif |
| 234 |
|
| 235 |
#define SB do { |
| 236 |
#define SE } while (0) |
| 237 |
|
| 238 |
#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE |
| 239 |
#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE |
| 240 |
|
| 241 |
#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE |
| 242 |
|
| 243 |
static void |
| 244 |
load_state(pTHX_ Coro__State c) |
| 245 |
{ |
| 246 |
PL_dowarn = c->dowarn; |
| 247 |
|
| 248 |
PL_curstackinfo = c->curstackinfo; |
| 249 |
PL_curstack = c->curstack; |
| 250 |
PL_mainstack = c->mainstack; |
| 251 |
PL_stack_sp = c->stack_sp; |
| 252 |
PL_op = c->op; |
| 253 |
PL_curpad = c->curpad; |
| 254 |
PL_stack_base = c->stack_base; |
| 255 |
PL_stack_max = c->stack_max; |
| 256 |
PL_tmps_stack = c->tmps_stack; |
| 257 |
PL_tmps_floor = c->tmps_floor; |
| 258 |
PL_tmps_ix = c->tmps_ix; |
| 259 |
PL_tmps_max = c->tmps_max; |
| 260 |
PL_markstack = c->markstack; |
| 261 |
PL_markstack_ptr = c->markstack_ptr; |
| 262 |
PL_markstack_max = c->markstack_max; |
| 263 |
PL_scopestack = c->scopestack; |
| 264 |
PL_scopestack_ix = c->scopestack_ix; |
| 265 |
PL_scopestack_max = c->scopestack_max; |
| 266 |
PL_savestack = c->savestack; |
| 267 |
PL_savestack_ix = c->savestack_ix; |
| 268 |
PL_savestack_max = c->savestack_max; |
| 269 |
PL_retstack = c->retstack; |
| 270 |
PL_retstack_ix = c->retstack_ix; |
| 271 |
PL_retstack_max = c->retstack_max; |
| 272 |
PL_curcop = c->curcop; |
| 273 |
|
| 274 |
if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
| 275 |
if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
| 276 |
if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
| 277 |
|
| 278 |
{ |
| 279 |
dSP; |
| 280 |
CV *cv; |
| 281 |
|
| 282 |
/* now do the ugly restore mess */ |
| 283 |
while ((cv = (CV *)POPs)) |
| 284 |
{ |
| 285 |
AV *padlist = (AV *)POPs; |
| 286 |
|
| 287 |
if (padlist) |
| 288 |
{ |
| 289 |
put_padlist (cv); /* mark this padlist as available */ |
| 290 |
CvPADLIST(cv) = padlist; |
| 291 |
#ifdef USE_THREADS |
| 292 |
/*CvOWNER(cv) = (struct perl_thread *)POPs;*/ |
| 293 |
#endif |
| 294 |
} |
| 295 |
|
| 296 |
++CvDEPTH(cv); |
| 297 |
} |
| 298 |
|
| 299 |
PUTBACK; |
| 300 |
} |
| 301 |
} |
| 302 |
|
| 303 |
static void |
| 304 |
save_state(pTHX_ Coro__State c, int flags) |
| 305 |
{ |
| 306 |
{ |
| 307 |
dSP; |
| 308 |
I32 cxix = cxstack_ix; |
| 309 |
PERL_CONTEXT *ccstk = cxstack; |
| 310 |
PERL_SI *top_si = PL_curstackinfo; |
| 311 |
|
| 312 |
/* |
| 313 |
* the worst thing you can imagine happens first - we have to save |
| 314 |
* (and reinitialize) all cv's in the whole callchain :( |
| 315 |
*/ |
| 316 |
|
| 317 |
PUSHs (Nullsv); |
| 318 |
/* this loop was inspired by pp_caller */ |
| 319 |
for (;;) |
| 320 |
{ |
| 321 |
do |
| 322 |
{ |
| 323 |
PERL_CONTEXT *cx = &ccstk[cxix--]; |
| 324 |
|
| 325 |
if (CxTYPE(cx) == CXt_SUB) |
| 326 |
{ |
| 327 |
CV *cv = cx->blk_sub.cv; |
| 328 |
if (CvDEPTH(cv)) |
| 329 |
{ |
| 330 |
#ifdef USE_THREADS |
| 331 |
/*XPUSHs ((SV *)CvOWNER(cv));*/ |
| 332 |
/*CvOWNER(cv) = 0;*/ |
| 333 |
/*error must unlock this cv etc.. etc...*/ |
| 334 |
#endif |
| 335 |
EXTEND (SP, CvDEPTH(cv)*2); |
| 336 |
|
| 337 |
while (--CvDEPTH(cv)) |
| 338 |
{ |
| 339 |
/* this tells the restore code to increment CvDEPTH */ |
| 340 |
PUSHs (Nullsv); |
| 341 |
PUSHs ((SV *)cv); |
| 342 |
} |
| 343 |
|
| 344 |
PUSHs ((SV *)CvPADLIST(cv)); |
| 345 |
PUSHs ((SV *)cv); |
| 346 |
|
| 347 |
get_padlist (cv); /* this is a monster */ |
| 348 |
} |
| 349 |
} |
| 350 |
else if (CxTYPE(cx) == CXt_FORMAT) |
| 351 |
{ |
| 352 |
/* I never used formats, so how should I know how these are implemented? */ |
| 353 |
/* my bold guess is as a simple, plain sub... */ |
| 354 |
croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); |
| 355 |
} |
| 356 |
} |
| 357 |
while (cxix >= 0); |
| 358 |
|
| 359 |
if (top_si->si_type == PERLSI_MAIN) |
| 360 |
break; |
| 361 |
|
| 362 |
top_si = top_si->si_prev; |
| 363 |
ccstk = top_si->si_cxstack; |
| 364 |
cxix = top_si->si_cxix; |
| 365 |
} |
| 366 |
|
| 367 |
PUTBACK; |
| 368 |
} |
| 369 |
|
| 370 |
c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
| 371 |
c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
| 372 |
c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
| 373 |
|
| 374 |
/* I have not the slightest idea of why av_reify is necessary */ |
| 375 |
/* but if it's missing the defav contents magically get replaced sometimes */ |
| 376 |
if (c->defav) |
| 377 |
av_reify (c->defav); |
| 378 |
|
| 379 |
c->dowarn = PL_dowarn; |
| 380 |
|
| 381 |
c->curstackinfo = PL_curstackinfo; |
| 382 |
c->curstack = PL_curstack; |
| 383 |
c->mainstack = PL_mainstack; |
| 384 |
c->stack_sp = PL_stack_sp; |
| 385 |
c->op = PL_op; |
| 386 |
c->curpad = PL_curpad; |
| 387 |
c->stack_base = PL_stack_base; |
| 388 |
c->stack_max = PL_stack_max; |
| 389 |
c->tmps_stack = PL_tmps_stack; |
| 390 |
c->tmps_floor = PL_tmps_floor; |
| 391 |
c->tmps_ix = PL_tmps_ix; |
| 392 |
c->tmps_max = PL_tmps_max; |
| 393 |
c->markstack = PL_markstack; |
| 394 |
c->markstack_ptr = PL_markstack_ptr; |
| 395 |
c->markstack_max = PL_markstack_max; |
| 396 |
c->scopestack = PL_scopestack; |
| 397 |
c->scopestack_ix = PL_scopestack_ix; |
| 398 |
c->scopestack_max = PL_scopestack_max; |
| 399 |
c->savestack = PL_savestack; |
| 400 |
c->savestack_ix = PL_savestack_ix; |
| 401 |
c->savestack_max = PL_savestack_max; |
| 402 |
c->retstack = PL_retstack; |
| 403 |
c->retstack_ix = PL_retstack_ix; |
| 404 |
c->retstack_max = PL_retstack_max; |
| 405 |
c->curcop = PL_curcop; |
| 406 |
} |
| 407 |
|
| 408 |
/* |
| 409 |
* destroy the stacks, the callchain etc... |
| 410 |
* still there is a memleak of 128 bytes... |
| 411 |
*/ |
| 412 |
STATIC void |
| 413 |
destroy_stacks(pTHX) |
| 414 |
{ |
| 415 |
/* is this ugly, I ask? */ |
| 416 |
while (PL_scopestack_ix) |
| 417 |
LEAVE; |
| 418 |
|
| 419 |
/* sure it is, but more important: is it correct?? :/ */ |
| 420 |
while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ |
| 421 |
FREETMPS; |
| 422 |
|
| 423 |
while (PL_curstackinfo->si_next) |
| 424 |
PL_curstackinfo = PL_curstackinfo->si_next; |
| 425 |
|
| 426 |
while (PL_curstackinfo) |
| 427 |
{ |
| 428 |
PERL_SI *p = PL_curstackinfo->si_prev; |
| 429 |
|
| 430 |
{ |
| 431 |
dSP; |
| 432 |
SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); |
| 433 |
PUTBACK; /* possibly superfluous */ |
| 434 |
} |
| 435 |
|
| 436 |
dounwind(-1); |
| 437 |
|
| 438 |
SvREFCNT_dec(PL_curstackinfo->si_stack); |
| 439 |
Safefree(PL_curstackinfo->si_cxstack); |
| 440 |
Safefree(PL_curstackinfo); |
| 441 |
PL_curstackinfo = p; |
| 442 |
} |
| 443 |
|
| 444 |
Safefree(PL_tmps_stack); |
| 445 |
Safefree(PL_markstack); |
| 446 |
Safefree(PL_scopestack); |
| 447 |
Safefree(PL_savestack); |
| 448 |
Safefree(PL_retstack); |
| 449 |
} |
| 450 |
|
| 451 |
STATIC void |
| 452 |
transfer(pTHX_ struct coro *prev, struct coro *next, int flags) |
| 453 |
{ |
| 454 |
dSP; |
| 455 |
|
| 456 |
if (prev != next) |
| 457 |
{ |
| 458 |
/* |
| 459 |
* this could be done in newprocess which would lead to |
| 460 |
* extremely elegant and fast (just SAVE/LOAD) |
| 461 |
* code here, but lazy allocation of stacks has also |
| 462 |
* some virtues and the overhead of the if() is nil. |
| 463 |
*/ |
| 464 |
if (next->mainstack) |
| 465 |
{ |
| 466 |
SAVE (prev, flags); |
| 467 |
LOAD (next); |
| 468 |
/* mark this state as in-use */ |
| 469 |
next->mainstack = 0; |
| 470 |
next->tmps_ix = -2; |
| 471 |
} |
| 472 |
else if (next->tmps_ix == -2) |
| 473 |
{ |
| 474 |
croak ("tried to transfer to running coroutine"); |
| 475 |
} |
| 476 |
else |
| 477 |
{ |
| 478 |
/* |
| 479 |
* emulate part of the perl startup here. |
| 480 |
*/ |
| 481 |
UNOP myop; |
| 482 |
|
| 483 |
SAVE (prev, -1); /* first get rid of the old state */ |
| 484 |
|
| 485 |
init_stacks (); /* from perl.c */ |
| 486 |
SPAGAIN; |
| 487 |
|
| 488 |
PL_op = (OP *)&myop; |
| 489 |
/*PL_curcop = 0;*/ |
| 490 |
SvREFCNT_dec (GvAV (PL_defgv)); |
| 491 |
GvAV (PL_defgv) = next->args; |
| 492 |
|
| 493 |
Zero(&myop, 1, UNOP); |
| 494 |
myop.op_next = Nullop; |
| 495 |
myop.op_flags = OPf_WANT_VOID; |
| 496 |
|
| 497 |
PUSHMARK(SP); |
| 498 |
XPUSHs ((SV*)get_cv(SUB_INIT, TRUE)); |
| 499 |
/* |
| 500 |
* the next line is slightly wrong, as PL_op->op_next |
| 501 |
* is actually being executed so we skip the first op. |
| 502 |
* that doesn't matter, though, since it is only |
| 503 |
* pp_nextstate and we never return... |
| 504 |
* ah yes, and I don't care anyways ;) |
| 505 |
*/ |
| 506 |
PUTBACK; |
| 507 |
PL_op = pp_entersub(aTHX); |
| 508 |
SPAGAIN; |
| 509 |
|
| 510 |
ENTER; /* necessary e.g. for dounwind */ |
| 511 |
} |
| 512 |
} |
| 513 |
} |
| 514 |
|
| 515 |
MODULE = Coro::State PACKAGE = Coro::State |
| 516 |
|
| 517 |
PROTOTYPES: ENABLE |
| 518 |
|
| 519 |
BOOT: |
| 520 |
{ /* {} necessary for stoopid perl-5.6.x */ |
| 521 |
HV * stash = gv_stashpvn("Coro::State", 10, TRUE); |
| 522 |
|
| 523 |
newCONSTSUB (stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); |
| 524 |
newCONSTSUB (stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); |
| 525 |
newCONSTSUB (stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); |
| 526 |
|
| 527 |
if (!padlist_cache) |
| 528 |
padlist_cache = newHV (); |
| 529 |
|
| 530 |
main_mainstack = PL_mainstack; |
| 531 |
} |
| 532 |
|
| 533 |
Coro::State |
| 534 |
_newprocess(args) |
| 535 |
SV * args |
| 536 |
PROTOTYPE: $ |
| 537 |
CODE: |
| 538 |
Coro__State coro; |
| 539 |
|
| 540 |
if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) |
| 541 |
croak ("Coro::State::_newprocess expects an arrayref"); |
| 542 |
|
| 543 |
New (0, coro, 1, struct coro); |
| 544 |
|
| 545 |
coro->mainstack = 0; /* actual work is done inside transfer */ |
| 546 |
coro->args = (AV *)SvREFCNT_inc (SvRV (args)); |
| 547 |
|
| 548 |
RETVAL = coro; |
| 549 |
OUTPUT: |
| 550 |
RETVAL |
| 551 |
|
| 552 |
void |
| 553 |
transfer(prev, next, flags = TRANSFER_SAVE_ALL) |
| 554 |
Coro::State_or_hashref prev |
| 555 |
Coro::State_or_hashref next |
| 556 |
int flags |
| 557 |
PROTOTYPE: @ |
| 558 |
CODE: |
| 559 |
|
| 560 |
transfer (aTHX_ prev, next, flags); |
| 561 |
|
| 562 |
void |
| 563 |
DESTROY(coro) |
| 564 |
Coro::State coro |
| 565 |
CODE: |
| 566 |
|
| 567 |
if (coro->mainstack && coro->mainstack != main_mainstack) |
| 568 |
{ |
| 569 |
struct coro temp; |
| 570 |
|
| 571 |
SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); |
| 572 |
LOAD(aTHX_ coro); |
| 573 |
|
| 574 |
destroy_stacks (); |
| 575 |
|
| 576 |
LOAD((&temp)); /* this will get rid of defsv etc.. */ |
| 577 |
} |
| 578 |
|
| 579 |
Safefree (coro); |
| 580 |
|
| 581 |
/* |
| 582 |
* there is one problematic case left (remember _recurse?) |
| 583 |
* consider the case when we |
| 584 |
* |
| 585 |
* 1. start a coroutine |
| 586 |
* 2. inside it descend into some xs functions |
| 587 |
* 3. xs function calls a callback |
| 588 |
* 4. callback switches to $main |
| 589 |
* 5. $main ends - we will end inside the xs function |
| 590 |
* 6. xs function returns and perl executes - what? |
| 591 |
* |
| 592 |
* to avoid this case we recurse in this function |
| 593 |
* and simply call my_exit(0), skipping other xs functions |
| 594 |
*/ |
| 595 |
|
| 596 |
#if 0 |
| 597 |
void |
| 598 |
_recurse() |
| 599 |
CODE: |
| 600 |
LEAVE; |
| 601 |
PL_stack_sp = PL_stack_base + ax - 1; |
| 602 |
PL_op = PL_op->op_next; |
| 603 |
CALLRUNOPS(aTHX); |
| 604 |
printf ("my_exit\n"); |
| 605 |
my_exit (0); |
| 606 |
|
| 607 |
#endif |
| 608 |
|
| 609 |
void |
| 610 |
flush() |
| 611 |
CODE: |
| 612 |
#ifdef MAY_FLUSH |
| 613 |
flush_padlist_cache (); |
| 614 |
#endif |
| 615 |
|
| 616 |
MODULE = Coro::State PACKAGE = Coro::Cont |
| 617 |
|
| 618 |
# this is dirty (do you hear me?) and should be in it's own .xs |
| 619 |
|
| 620 |
void |
| 621 |
result(...) |
| 622 |
PROTOTYPE: @ |
| 623 |
CODE: |
| 624 |
static SV *returnstk; |
| 625 |
SV *sv; |
| 626 |
AV *defav = GvAV (PL_defgv); |
| 627 |
struct coro *prev, *next; |
| 628 |
|
| 629 |
if (!returnstk) |
| 630 |
returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); |
| 631 |
|
| 632 |
/* set up @_ -- ugly */ |
| 633 |
av_clear (defav); |
| 634 |
av_fill (defav, items - 1); |
| 635 |
while (items--) |
| 636 |
av_store (defav, items, SvREFCNT_inc (ST(items))); |
| 637 |
|
| 638 |
mg_get (returnstk); /* isn't documentation wrong for mg_get? */ |
| 639 |
sv = av_pop ((AV *)SvRV (returnstk)); |
| 640 |
prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); |
| 641 |
next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); |
| 642 |
SvREFCNT_dec (sv); |
| 643 |
transfer(prev, next, 0); |
| 644 |
|
