| 1 |
#include "EXTERN.h" |
| 2 |
#include "perl.h" |
| 3 |
#include "XSUB.h" |
| 4 |
|
| 5 |
#include "libcoro/coro.c" |
| 6 |
|
| 7 |
#include <signal.h> |
| 8 |
|
| 9 |
#ifdef HAVE_MMAP |
| 10 |
# include <unistd.h> |
| 11 |
# include <sys/mman.h> |
| 12 |
# ifndef MAP_ANON |
| 13 |
# ifdef MAP_ANONYMOUS |
| 14 |
# define MAP_ANON MAP_ANONYMOUS |
| 15 |
# else |
| 16 |
# undef HAVE_MMAP |
| 17 |
# endif |
| 18 |
# endif |
| 19 |
#endif |
| 20 |
|
| 21 |
#define MAY_FLUSH /* increases codesize */ |
| 22 |
|
| 23 |
/* perl-related */ |
| 24 |
#define TRANSFER_SAVE_DEFAV 0x00000001 |
| 25 |
#define TRANSFER_SAVE_DEFSV 0x00000002 |
| 26 |
#define TRANSFER_SAVE_ERRSV 0x00000004 |
| 27 |
/* c-related */ |
| 28 |
#define TRANSFER_SAVE_CCTXT 0x00000008 |
| 29 |
#ifdef CORO_LAZY_STACK |
| 30 |
# define TRANSFER_LAZY_STACK 0x00000010 |
| 31 |
#else |
| 32 |
# define TRANSFER_LAZY_STACK 0x00000000 |
| 33 |
#endif |
| 34 |
|
| 35 |
#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ |
| 36 |
|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) |
| 37 |
|
| 38 |
#define SUB_INIT "Coro::State::initialize" |
| 39 |
#define UCORO_STATE "_coro_state" |
| 40 |
|
| 41 |
/* The next macro should delcare a variable stacklevel that contains and approximation |
| 42 |
* to the current C stack pointer. It's property is that it changes with each call |
| 43 |
* and should be unique. */ |
| 44 |
#define dSTACKLEVEL void *stacklevel = &stacklevel |
| 45 |
|
| 46 |
#define labs(l) ((l) >= 0 ? (l) : -(l)) |
| 47 |
|
| 48 |
/* this is actually not only the c stack but also c registers etc... */ |
| 49 |
typedef struct { |
| 50 |
int refcnt; /* pointer reference counter */ |
| 51 |
int usecnt; /* shared by how many coroutines */ |
| 52 |
int gencnt; /* generation counter */ |
| 53 |
|
| 54 |
coro_context cctx; |
| 55 |
|
| 56 |
void *sptr; |
| 57 |
long ssize; /* positive == mmap, otherwise malloc */ |
| 58 |
} coro_stack; |
| 59 |
|
| 60 |
struct coro { |
| 61 |
/* the optional C context */ |
| 62 |
coro_stack *stack; |
| 63 |
void *cursp; |
| 64 |
int gencnt; |
| 65 |
|
| 66 |
/* optionally saved, might be zero */ |
| 67 |
AV *defav; |
| 68 |
SV *defsv; |
| 69 |
SV *errsv; |
| 70 |
|
| 71 |
/* saved global state not related to stacks */ |
| 72 |
U8 dowarn; |
| 73 |
I32 in_eval; |
| 74 |
|
| 75 |
/* the stacks and related info (callchain etc..) */ |
| 76 |
PERL_SI *curstackinfo; |
| 77 |
AV *curstack; |
| 78 |
AV *mainstack; |
| 79 |
SV **stack_sp; |
| 80 |
OP *op; |
| 81 |
SV **curpad; |
| 82 |
SV **stack_base; |
| 83 |
SV **stack_max; |
| 84 |
SV **tmps_stack; |
| 85 |
I32 tmps_floor; |
| 86 |
I32 tmps_ix; |
| 87 |
I32 tmps_max; |
| 88 |
I32 *markstack; |
| 89 |
I32 *markstack_ptr; |
| 90 |
I32 *markstack_max; |
| 91 |
I32 *scopestack; |
| 92 |
I32 scopestack_ix; |
| 93 |
I32 scopestack_max; |
| 94 |
ANY *savestack; |
| 95 |
I32 savestack_ix; |
| 96 |
I32 savestack_max; |
| 97 |
OP **retstack; |
| 98 |
I32 retstack_ix; |
| 99 |
I32 retstack_max; |
| 100 |
COP *curcop; |
| 101 |
JMPENV *top_env; |
| 102 |
|
| 103 |
/* data associated with this coroutine (initial args) */ |
| 104 |
AV *args; |
| 105 |
}; |
| 106 |
|
| 107 |
typedef struct coro *Coro__State; |
| 108 |
typedef struct coro *Coro__State_or_hashref; |
| 109 |
|
| 110 |
static AV *main_mainstack; /* used to differentiate between $main and others */ |
| 111 |
static HV *coro_state_stash; |
| 112 |
static SV *ucoro_state_sv; |
| 113 |
static U32 ucoro_state_hash; |
| 114 |
static HV *padlist_cache; |
| 115 |
|
| 116 |
/* mostly copied from op.c:cv_clone2 */ |
| 117 |
STATIC AV * |
| 118 |
clone_padlist (AV *protopadlist) |
| 119 |
{ |
| 120 |
AV *av; |
| 121 |
I32 ix; |
| 122 |
AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); |
| 123 |
AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); |
| 124 |
SV **pname = AvARRAY (protopad_name); |
| 125 |
SV **ppad = AvARRAY (protopad); |
| 126 |
I32 fname = AvFILLp (protopad_name); |
| 127 |
I32 fpad = AvFILLp (protopad); |
| 128 |
AV *newpadlist, *newpad_name, *newpad; |
| 129 |
SV **npad; |
| 130 |
|
| 131 |
newpad_name = newAV (); |
| 132 |
for (ix = fname; ix >= 0; ix--) |
| 133 |
av_store (newpad_name, ix, SvREFCNT_inc (pname[ix])); |
| 134 |
|
| 135 |
newpad = newAV (); |
| 136 |
av_fill (newpad, AvFILLp (protopad)); |
| 137 |
npad = AvARRAY (newpad); |
| 138 |
|
| 139 |
newpadlist = newAV (); |
| 140 |
AvREAL_off (newpadlist); |
| 141 |
av_store (newpadlist, 0, (SV *) newpad_name); |
| 142 |
av_store (newpadlist, 1, (SV *) newpad); |
| 143 |
|
| 144 |
av = newAV (); /* will be @_ */ |
| 145 |
av_extend (av, 0); |
| 146 |
av_store (newpad, 0, (SV *) av); |
| 147 |
AvFLAGS (av) = AVf_REIFY; |
| 148 |
|
| 149 |
for (ix = fpad; ix > 0; ix--) |
| 150 |
{ |
| 151 |
SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; |
| 152 |
if (namesv && namesv != &PL_sv_undef) |
| 153 |
{ |
| 154 |
char *name = SvPVX (namesv); /* XXX */ |
| 155 |
if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') |
| 156 |
{ /* lexical from outside? */ |
| 157 |
npad[ix] = SvREFCNT_inc (ppad[ix]); |
| 158 |
} |
| 159 |
else |
| 160 |
{ /* our own lexical */ |
| 161 |
SV *sv; |
| 162 |
if (*name == '&') |
| 163 |
sv = SvREFCNT_inc (ppad[ix]); |
| 164 |
else if (*name == '@') |
| 165 |
sv = (SV *) newAV (); |
| 166 |
else if (*name == '%') |
| 167 |
sv = (SV *) newHV (); |
| 168 |
else |
| 169 |
sv = NEWSV (0, 0); |
| 170 |
if (!SvPADBUSY (sv)) |
| 171 |
SvPADMY_on (sv); |
| 172 |
npad[ix] = sv; |
| 173 |
} |
| 174 |
} |
| 175 |
else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) |
| 176 |
{ |
| 177 |
npad[ix] = SvREFCNT_inc (ppad[ix]); |
| 178 |
} |
| 179 |
else |
| 180 |
{ |
| 181 |
SV *sv = NEWSV (0, 0); |
| 182 |
SvPADTMP_on (sv); |
| 183 |
npad[ix] = sv; |
| 184 |
} |
| 185 |
} |
| 186 |
|
| 187 |
#if 0 /* return -ENOTUNDERSTOOD */ |
| 188 |
/* Now that vars are all in place, clone nested closures. */ |
| 189 |
|
| 190 |
for (ix = fpad; ix > 0; ix--) { |
| 191 |
SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; |
| 192 |
if (namesv |
| 193 |
&& namesv != &PL_sv_undef |
| 194 |
&& !(SvFLAGS(namesv) & SVf_FAKE) |
| 195 |
&& *SvPVX(namesv) == '&' |
| 196 |
&& CvCLONE(ppad[ix])) |
| 197 |
{ |
| 198 |
CV *kid = cv_clone((CV*)ppad[ix]); |
| 199 |
SvREFCNT_dec(ppad[ix]); |
| 200 |
CvCLONE_on(kid); |
| 201 |
SvPADMY_on(kid); |
| 202 |
npad[ix] = (SV*)kid; |
| 203 |
} |
| 204 |
} |
| 205 |
#endif |
| 206 |
|
| 207 |
return newpadlist; |
| 208 |
} |
| 209 |
|
| 210 |
#ifdef MAY_FLUSH |
| 211 |
STATIC AV * |
| 212 |
free_padlist (AV *padlist) |
| 213 |
{ |
| 214 |
/* may be during global destruction */ |
| 215 |
if (SvREFCNT(padlist)) |
| 216 |
{ |
| 217 |
I32 i = AvFILLp(padlist); |
| 218 |
while (i >= 0) |
| 219 |
{ |
| 220 |
SV **svp = av_fetch(padlist, i--, FALSE); |
| 221 |
SV *sv = svp ? *svp : Nullsv; |
| 222 |
if (sv) |
| 223 |
SvREFCNT_dec(sv); |
| 224 |
} |
| 225 |
|
| 226 |
SvREFCNT_dec((SV*)padlist); |
| 227 |
} |
| 228 |
} |
| 229 |
#endif |
| 230 |
|
| 231 |
/* the next two functions merely cache the padlists */ |
| 232 |
STATIC void |
| 233 |
get_padlist (CV *cv) |
| 234 |
{ |
| 235 |
SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); |
| 236 |
|
| 237 |
if (he && AvFILLp ((AV *)*he) >= 0) |
| 238 |
CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); |
| 239 |
else |
| 240 |
CvPADLIST (cv) = clone_padlist (CvPADLIST (cv)); |
| 241 |
} |
| 242 |
|
| 243 |
STATIC void |
| 244 |
put_padlist (CV *cv) |
| 245 |
{ |
| 246 |
SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1); |
| 247 |
|
| 248 |
if (SvTYPE (*he) != SVt_PVAV) |
| 249 |
{ |
| 250 |
SvREFCNT_dec (*he); |
| 251 |
*he = (SV *)newAV (); |
| 252 |
} |
| 253 |
|
| 254 |
av_push ((AV *)*he, (SV *)CvPADLIST (cv)); |
| 255 |
} |
| 256 |
|
| 257 |
#ifdef MAY_FLUSH |
| 258 |
STATIC void |
| 259 |
flush_padlist_cache () |
| 260 |
{ |
| 261 |
HV *hv = padlist_cache; |
| 262 |
padlist_cache = newHV (); |
| 263 |
|
| 264 |
if (hv_iterinit (hv)) |
| 265 |
{ |
| 266 |
HE *he; |
| 267 |
AV *padlist; |
| 268 |
|
| 269 |
while (!!(he = hv_iternext (hv))) |
| 270 |
{ |
| 271 |
AV *av = (AV *)HeVAL(he); |
| 272 |
|
| 273 |
/* casting is fun. */ |
| 274 |
while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) |
| 275 |
free_padlist (padlist); |
| 276 |
} |
| 277 |
} |
| 278 |
|
| 279 |
SvREFCNT_dec (hv); |
| 280 |
} |
| 281 |
#endif |
| 282 |
|
| 283 |
#define SB do { |
| 284 |
#define SE } while (0) |
| 285 |
|
| 286 |
#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE |
| 287 |
#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE |
| 288 |
|
| 289 |
#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE |
| 290 |
|
| 291 |
static void |
| 292 |
load_state(pTHX_ Coro__State c) |
| 293 |
{ |
| 294 |
PL_dowarn = c->dowarn; |
| 295 |
PL_in_eval = c->in_eval; |
| 296 |
|
| 297 |
PL_curstackinfo = c->curstackinfo; |
| 298 |
PL_curstack = c->curstack; |
| 299 |
PL_mainstack = c->mainstack; |
| 300 |
PL_stack_sp = c->stack_sp; |
| 301 |
PL_op = c->op; |
| 302 |
PL_curpad = c->curpad; |
| 303 |
PL_stack_base = c->stack_base; |
| 304 |
PL_stack_max = c->stack_max; |
| 305 |
PL_tmps_stack = c->tmps_stack; |
| 306 |
PL_tmps_floor = c->tmps_floor; |
| 307 |
PL_tmps_ix = c->tmps_ix; |
| 308 |
PL_tmps_max = c->tmps_max; |
| 309 |
PL_markstack = c->markstack; |
| 310 |
PL_markstack_ptr = c->markstack_ptr; |
| 311 |
PL_markstack_max = c->markstack_max; |
| 312 |
PL_scopestack = c->scopestack; |
| 313 |
PL_scopestack_ix = c->scopestack_ix; |
| 314 |
PL_scopestack_max = c->scopestack_max; |
| 315 |
PL_savestack = c->savestack; |
| 316 |
PL_savestack_ix = c->savestack_ix; |
| 317 |
PL_savestack_max = c->savestack_max; |
| 318 |
PL_retstack = c->retstack; |
| 319 |
PL_retstack_ix = c->retstack_ix; |
| 320 |
PL_retstack_max = c->retstack_max; |
| 321 |
PL_curcop = c->curcop; |
| 322 |
PL_top_env = c->top_env; |
| 323 |
|
| 324 |
if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
| 325 |
if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
| 326 |
if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
| 327 |
|
| 328 |
{ |
| 329 |
dSP; |
| 330 |
CV *cv; |
| 331 |
|
| 332 |
/* now do the ugly restore mess */ |
| 333 |
while ((cv = (CV *)POPs)) |
| 334 |
{ |
| 335 |
AV *padlist = (AV *)POPs; |
| 336 |
|
| 337 |
if (padlist) |
| 338 |
{ |
| 339 |
put_padlist (cv); /* mark this padlist as available */ |
| 340 |
CvPADLIST(cv) = padlist; |
| 341 |
#ifdef USE_THREADS |
| 342 |
/*CvOWNER(cv) = (struct perl_thread *)POPs;*/ |
| 343 |
#endif |
| 344 |
} |
| 345 |
|
| 346 |
++CvDEPTH(cv); |
| 347 |
} |
| 348 |
|
| 349 |
PUTBACK; |
| 350 |
} |
| 351 |
} |
| 352 |
|
| 353 |
static void |
| 354 |
save_state(pTHX_ Coro__State c, int flags) |
| 355 |
{ |
| 356 |
{ |
| 357 |
dSP; |
| 358 |
I32 cxix = cxstack_ix; |
| 359 |
PERL_CONTEXT *ccstk = cxstack; |
| 360 |
PERL_SI *top_si = PL_curstackinfo; |
| 361 |
|
| 362 |
/* |
| 363 |
* the worst thing you can imagine happens first - we have to save |
| 364 |
* (and reinitialize) all cv's in the whole callchain :( |
| 365 |
*/ |
| 366 |
|
| 367 |
PUSHs (Nullsv); |
| 368 |
/* this loop was inspired by pp_caller */ |
| 369 |
for (;;) |
| 370 |
{ |
| 371 |
do |
| 372 |
{ |
| 373 |
PERL_CONTEXT *cx = &ccstk[cxix--]; |
| 374 |
|
| 375 |
if (CxTYPE(cx) == CXt_SUB) |
| 376 |
{ |
| 377 |
CV *cv = cx->blk_sub.cv; |
| 378 |
if (CvDEPTH(cv)) |
| 379 |
{ |
| 380 |
#ifdef USE_THREADS |
| 381 |
/*XPUSHs ((SV *)CvOWNER(cv));*/ |
| 382 |
/*CvOWNER(cv) = 0;*/ |
| 383 |
/*error must unlock this cv etc.. etc...*/ |
| 384 |
#endif |
| 385 |
EXTEND (SP, CvDEPTH(cv)*2); |
| 386 |
|
| 387 |
while (--CvDEPTH(cv)) |
| 388 |
{ |
| 389 |
/* this tells the restore code to increment CvDEPTH */ |
| 390 |
PUSHs (Nullsv); |
| 391 |
PUSHs ((SV *)cv); |
| 392 |
} |
| 393 |
|
| 394 |
PUSHs ((SV *)CvPADLIST(cv)); |
| 395 |
PUSHs ((SV *)cv); |
| 396 |
|
| 397 |
get_padlist (cv); /* this is a monster */ |
| 398 |
} |
| 399 |
} |
| 400 |
else if (CxTYPE(cx) == CXt_FORMAT) |
| 401 |
{ |
| 402 |
/* I never used formats, so how should I know how these are implemented? */ |
| 403 |
/* my bold guess is as a simple, plain sub... */ |
| 404 |
croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); |
| 405 |
} |
| 406 |
} |
| 407 |
while (cxix >= 0); |
| 408 |
|
| 409 |
if (top_si->si_type == PERLSI_MAIN) |
| 410 |
break; |
| 411 |
|
| 412 |
top_si = top_si->si_prev; |
| 413 |
ccstk = top_si->si_cxstack; |
| 414 |
cxix = top_si->si_cxix; |
| 415 |
} |
| 416 |
|
| 417 |
PUTBACK; |
| 418 |
} |
| 419 |
|
| 420 |
c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
| 421 |
c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
| 422 |
c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
| 423 |
|
| 424 |
/* I have not the slightest idea of why av_reify is necessary */ |
| 425 |
/* but if it's missing the defav contents magically get replaced sometimes */ |
| 426 |
if (c->defav) |
| 427 |
av_reify (c->defav); |
| 428 |
|
| 429 |
c->dowarn = PL_dowarn; |
| 430 |
c->in_eval = PL_in_eval; |
| 431 |
|
| 432 |
c->curstackinfo = PL_curstackinfo; |
| 433 |
c->curstack = PL_curstack; |
| 434 |
c->mainstack = PL_mainstack; |
| 435 |
c->stack_sp = PL_stack_sp; |
| 436 |
c->op = PL_op; |
| 437 |
c->curpad = PL_curpad; |
| 438 |
c->stack_base = PL_stack_base; |
| 439 |
c->stack_max = PL_stack_max; |
| 440 |
c->tmps_stack = PL_tmps_stack; |
| 441 |
c->tmps_floor = PL_tmps_floor; |
| 442 |
c->tmps_ix = PL_tmps_ix; |
| 443 |
c->tmps_max = PL_tmps_max; |
| 444 |
c->markstack = PL_markstack; |
| 445 |
c->markstack_ptr = PL_markstack_ptr; |
| 446 |
c->markstack_max = PL_markstack_max; |
| 447 |
c->scopestack = PL_scopestack; |
| 448 |
c->scopestack_ix = PL_scopestack_ix; |
| 449 |
c->scopestack_max = PL_scopestack_max; |
| 450 |
c->savestack = PL_savestack; |
| 451 |
c->savestack_ix = PL_savestack_ix; |
| 452 |
c->savestack_max = PL_savestack_max; |
| 453 |
c->retstack = PL_retstack; |
| 454 |
c->retstack_ix = PL_retstack_ix; |
| 455 |
c->retstack_max = PL_retstack_max; |
| 456 |
c->curcop = PL_curcop; |
| 457 |
c->top_env = PL_top_env; |
| 458 |
} |
| 459 |
|
| 460 |
/* |
| 461 |
* allocate various perl stacks. This is an exact copy |
| 462 |
* of perl.c:init_stacks, except that it uses less memory |
| 463 |
* on the assumption that coroutines do not usually need |
| 464 |
* a lot of stackspace. |
| 465 |
*/ |
| 466 |
STATIC void |
| 467 |
coro_init_stacks (pTHX) |
| 468 |
{ |
| 469 |
PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); |
| 470 |
PL_curstackinfo->si_type = PERLSI_MAIN; |
| 471 |
PL_curstack = PL_curstackinfo->si_stack; |
| 472 |
PL_mainstack = PL_curstack; /* remember in case we switch stacks */ |
| 473 |
|
| 474 |
PL_stack_base = AvARRAY(PL_curstack); |
| 475 |
PL_stack_sp = PL_stack_base; |
| 476 |
PL_stack_max = PL_stack_base + AvMAX(PL_curstack); |
| 477 |
|
| 478 |
New(50,PL_tmps_stack,96,SV*); |
| 479 |
PL_tmps_floor = -1; |
| 480 |
PL_tmps_ix = -1; |
| 481 |
PL_tmps_max = 96; |
| 482 |
|
| 483 |
New(54,PL_markstack,16,I32); |
| 484 |
PL_markstack_ptr = PL_markstack; |
| 485 |
PL_markstack_max = PL_markstack + 16; |
| 486 |
|
| 487 |
SET_MARK_OFFSET; |
| 488 |
|
| 489 |
New(54,PL_scopestack,16,I32); |
| 490 |
PL_scopestack_ix = 0; |
| 491 |
PL_scopestack_max = 16; |
| 492 |
|
| 493 |
New(54,PL_savestack,96,ANY); |
| 494 |
PL_savestack_ix = 0; |
| 495 |
PL_savestack_max = 96; |
| 496 |
|
| 497 |
New(54,PL_retstack,8,OP*); |
| 498 |
PL_retstack_ix = 0; |
| 499 |
PL_retstack_max = 8; |
| 500 |
} |
| 501 |
|
| 502 |
/* |
| 503 |
* destroy the stacks, the callchain etc... |
| 504 |
* still there is a memleak of 128 bytes... |
| 505 |
*/ |
| 506 |
STATIC void |
| 507 |
destroy_stacks(pTHX) |
| 508 |
{ |
| 509 |
/* is this ugly, I ask? */ |
| 510 |
while (PL_scopestack_ix) |
| 511 |
LEAVE; |
| 512 |
|
| 513 |
/* sure it is, but more important: is it correct?? :/ */ |
| 514 |
while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ |
| 515 |
FREETMPS; |
| 516 |
|
| 517 |
while (PL_curstackinfo->si_next) |
| 518 |
PL_curstackinfo = PL_curstackinfo->si_next; |
| 519 |
|
| 520 |
while (PL_curstackinfo) |
| 521 |
{ |
| 522 |
PERL_SI *p = PL_curstackinfo->si_prev; |
| 523 |
|
| 524 |
{ |
| 525 |
dSP; |
| 526 |
SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); |
| 527 |
PUTBACK; /* possibly superfluous */ |
| 528 |
} |
| 529 |
|
| 530 |
dounwind(-1); |
| 531 |
|
| 532 |
SvREFCNT_dec(PL_curstackinfo->si_stack); |
| 533 |
Safefree(PL_curstackinfo->si_cxstack); |
| 534 |
Safefree(PL_curstackinfo); |
| 535 |
PL_curstackinfo = p; |
| 536 |
} |
| 537 |
|
| 538 |
Safefree(PL_tmps_stack); |
| 539 |
Safefree(PL_markstack); |
| 540 |
Safefree(PL_scopestack); |
| 541 |
Safefree(PL_savestack); |
| 542 |
Safefree(PL_retstack); |
| 543 |
} |
| 544 |
|
| 545 |
static void |
| 546 |
allocate_stack (Coro__State ctx, int alloc) |
| 547 |
{ |
| 548 |
coro_stack *stack; |
| 549 |
|
| 550 |
New (0, stack, 1, coro_stack); |
| 551 |
|
| 552 |
stack->refcnt = 1; |
| 553 |
stack->usecnt = 1; |
| 554 |
stack->gencnt = ctx->gencnt = 0; |
| 555 |
if (alloc) |
| 556 |
{ |
| 557 |
#ifdef HAVE_MMAP |
| 558 |
stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */ |
| 559 |
stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); |
| 560 |
if (stack->sptr == (void *)-1) |
| 561 |
#endif |
| 562 |
{ |
| 563 |
/*FIXME*//*D*//* reasonable stack size! */ |
| 564 |
stack->ssize = -4096 * sizeof (long); |
| 565 |
New (0, stack->sptr, 4096, long); |
| 566 |
} |
| 567 |
} |
| 568 |
else |
| 569 |
stack->sptr = 0; |
| 570 |
|
| 571 |
ctx->stack = stack; |
| 572 |
} |
| 573 |
|
| 574 |
static void |
| 575 |
deallocate_stack (Coro__State ctx) |
| 576 |
{ |
| 577 |
coro_stack *stack = ctx->stack; |
| 578 |
|
| 579 |
ctx->stack = 0; |
| 580 |
|
| 581 |
if (stack) |
| 582 |
{ |
| 583 |
if (!--stack->refcnt) |
| 584 |
{ |
| 585 |
#ifdef HAVE_MMAP |
| 586 |
if (stack->ssize > 0 && stack->sptr) |
| 587 |
munmap (stack->sptr, stack->ssize); |
| 588 |
else |
| 589 |
#else |
| 590 |
Safefree (stack->sptr); |
| 591 |
#endif |
| 592 |
Safefree (stack); |
| 593 |
} |
| 594 |
else if (ctx->gencnt == stack->gencnt) |
| 595 |
--stack->usecnt; |
| 596 |
} |
| 597 |
} |
| 598 |
|
| 599 |
static void |
| 600 |
setup_coro (void *arg) |
| 601 |
{ |
| 602 |
/* |
| 603 |
* emulate part of the perl startup here. |
| 604 |
*/ |
| 605 |
dSP; |
| 606 |
Coro__State ctx = (Coro__State)arg; |
| 607 |
SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE); |
| 608 |
|
| 609 |
coro_init_stacks (aTHX); |
| 610 |
/*PL_curcop = 0;*/ |
| 611 |
/*PL_in_eval = PL_in_eval;*/ /* inherit */ |
| 612 |
SvREFCNT_dec (GvAV (PL_defgv)); |
| 613 |
GvAV (PL_defgv) = ctx->args; |
| 614 |
|
| 615 |
SPAGAIN; |
| 616 |
|
| 617 |
if (ctx->stack) |
| 618 |
{ |
| 619 |
ctx->cursp = 0; |
| 620 |
|
| 621 |
PUSHMARK(SP); |
| 622 |
PUTBACK; |
| 623 |
(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); |
| 624 |
|
| 625 |
if (SvTRUE (ERRSV)) |
| 626 |
croak (NULL); |
| 627 |
else |
| 628 |
croak ("FATAL: CCTXT coroutine returned!"); |
| 629 |
} |
| 630 |
else |
| 631 |
{ |
| 632 |
UNOP myop; |
| 633 |
|
| 634 |
PL_op = (OP *)&myop; |
| 635 |
|
| 636 |
Zero(&myop, 1, UNOP); |
| 637 |
myop.op_next = Nullop; |
| 638 |
myop.op_flags = OPf_WANT_VOID; |
| 639 |
|
| 640 |
PUSHMARK(SP); |
| 641 |
XPUSHs (sub_init); |
| 642 |
/* |
| 643 |
* the next line is slightly wrong, as PL_op->op_next |
| 644 |
* is actually being executed so we skip the first op. |
| 645 |
* that doesn't matter, though, since it is only |
| 646 |
* pp_nextstate and we never return... |
| 647 |
* ah yes, and I don't care anyways ;) |
| 648 |
*/ |
| 649 |
PUTBACK; |
| 650 |
PL_op = pp_entersub(); |
| 651 |
SPAGAIN; |
| 652 |
|
| 653 |
ENTER; /* necessary e.g. for dounwind */ |
| 654 |
} |
| 655 |
} |
| 656 |
|
| 657 |
static void |
| 658 |
continue_coro (void *arg) |
| 659 |
{ |
| 660 |
/* |
| 661 |
* this is a _very_ stripped down perl interpreter ;) |
| 662 |
*/ |
| 663 |
Coro__State ctx = (Coro__State)arg; |
| 664 |
|
| 665 |
/*FIXME*//* must set up top_env here */ |
| 666 |
ctx->cursp = 0; |
| 667 |
PL_op = PL_op->op_next; |
| 668 |
CALLRUNOPS(aTHX); |
| 669 |
|
| 670 |
abort (); |
| 671 |
} |
| 672 |
|
| 673 |
STATIC void |
| 674 |
transfer(pTHX_ struct coro *prev, struct coro *next, int flags) |
| 675 |
{ |
| 676 |
dSP; |
| 677 |
dSTACKLEVEL; |
| 678 |
|
| 679 |
if (prev != next) |
| 680 |
{ |
| 681 |
if (next->mainstack) |
| 682 |
{ |
| 683 |
SAVE (prev, flags); |
| 684 |
LOAD (next); |
| 685 |
|
| 686 |
/* mark this state as in-use */ |
| 687 |
next->mainstack = 0; |
| 688 |
next->tmps_ix = -2; |
| 689 |
|
| 690 |
/* stacklevel changed? if yes, grab the stack for us! */ |
| 691 |
if (flags & TRANSFER_SAVE_CCTXT) |
| 692 |
{ |
| 693 |
if (!prev->stack) |
| 694 |
allocate_stack (prev, 0); |
| 695 |
else if (prev->cursp != stacklevel |
| 696 |
&& prev->stack->usecnt > 1) |
| 697 |
{ |
| 698 |
prev->gencnt = ++prev->stack->gencnt; |
| 699 |
prev->stack->usecnt = 1; |
| 700 |
} |
| 701 |
|
| 702 |
/* has our stack been invalidated? */ |
| 703 |
if (next->stack && next->stack->gencnt != next->gencnt) |
| 704 |
{ |
| 705 |
deallocate_stack (next); |
| 706 |
allocate_stack (next, 1); |
| 707 |
coro_create (&(next->stack->cctx), |
| 708 |
continue_coro, (void *)next, |
| 709 |
next->stack->sptr, labs (next->stack->ssize)); |
| 710 |
} |
| 711 |
|
| 712 |
coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
| 713 |
} |
| 714 |
|
| 715 |
} |
| 716 |
else if (next->tmps_ix == -2) |
| 717 |
croak ("tried to transfer to running coroutine"); |
| 718 |
else |
| 719 |
{ |
| 720 |
SAVE (prev, -1); /* first get rid of the old state */ |
| 721 |
|
| 722 |
if (flags & TRANSFER_SAVE_CCTXT) |
| 723 |
{ |
| 724 |
if (!prev->stack) |
| 725 |
allocate_stack (prev, 0); |
| 726 |
|
| 727 |
if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) |
| 728 |
{ |
| 729 |
setup_coro (next); |
| 730 |
|
| 731 |
prev->stack->refcnt++; |
| 732 |
prev->stack->usecnt++; |
| 733 |
next->stack = prev->stack; |
| 734 |
next->gencnt = prev->gencnt; |
| 735 |
} |
| 736 |
else |
| 737 |
{ |
| 738 |
allocate_stack (next, 1); |
| 739 |
coro_create (&(next->stack->cctx), |
| 740 |
setup_coro, (void *)next, |
| 741 |
next->stack->sptr, labs (next->stack->ssize)); |
| 742 |
coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
| 743 |
} |
| 744 |
} |
| 745 |
else |
| 746 |
setup_coro (next); |
| 747 |
} |
| 748 |
} |
| 749 |
|
| 750 |
next->cursp = stacklevel; |
| 751 |
} |
| 752 |
|
| 753 |
static struct coro * |
| 754 |
sv_to_coro (SV *arg, const char *funcname, const char *varname) |
| 755 |
{ |
| 756 |
if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) |
| 757 |
{ |
| 758 |
HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); |
| 759 |
|
| 760 |
if (!he) |
| 761 |
croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); |
| 762 |
|
| 763 |
arg = HeVAL(he); |
| 764 |
} |
| 765 |
|
| 766 |
/* must also be changed inside Coro::Cont::yield */ |
| 767 |
if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) |
| 768 |
return (struct coro *) SvIV((SV*)SvRV(arg)); |
| 769 |
else |
| 770 |
croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); |
| 771 |
} |
| 772 |
|
| 773 |
/** Coro ********************************************************************/ |
| 774 |
|
| 775 |
#define PRIO_MAX 3 |
| 776 |
#define PRIO_HIGH 1 |
| 777 |
#define PRIO_NORMAL 0 |
| 778 |
#define PRIO_LOW -1 |
| 779 |
#define PRIO_IDLE -3 |
| 780 |
#define PRIO_MIN -4 |
| 781 |
|
| 782 |
/* for Coro.pm */ |
| 783 |
static GV *coro_current, *coro_idle; |
| 784 |
static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; |
| 785 |
|
| 786 |
static void |
| 787 |
coro_enq (SV *sv) |
| 788 |
{ |
| 789 |
if (SvROK (sv)) |
| 790 |
{ |
| 791 |
SV *hv = SvRV (sv); |
| 792 |
if (SvTYPE (hv) == SVt_PVHV) |
| 793 |
{ |
| 794 |
SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); |
| 795 |
int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; |
| 796 |
|
| 797 |
prio = prio > PRIO_MAX ? PRIO_MAX |
| 798 |
: prio < PRIO_MIN ? PRIO_MIN |
| 799 |
: prio; |
| 800 |
|
| 801 |
av_push (coro_ready [prio - PRIO_MIN], sv); |
| 802 |
|
| 803 |
return; |
| 804 |
} |
| 805 |
} |
| 806 |
|
| 807 |
croak ("Coro::ready tried to enqueue something that is not a coroutine"); |
| 808 |
} |
| 809 |
|
| 810 |
static SV * |
| 811 |
coro_deq (int min_prio) |
| 812 |
{ |
| 813 |
int prio = PRIO_MAX - PRIO_MIN; |
| 814 |
|
| 815 |
min_prio -= PRIO_MIN; |
| 816 |
if (min_prio < 0) |
| 817 |
min_prio = 0; |
| 818 |
|
| 819 |
for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) |
| 820 |
if (av_len (coro_ready[prio]) >= 0) |
| 821 |
return av_shift (coro_ready[prio]); |
| 822 |
|
| 823 |
return 0; |
| 824 |
} |
| 825 |
|
| 826 |
MODULE = Coro::State PACKAGE = Coro::State |
| 827 |
|
| 828 |
PROTOTYPES: ENABLE |
| 829 |
|
| 830 |
BOOT: |
| 831 |
{ /* {} necessary for stoopid perl-5.6.x */ |
| 832 |
ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); |
| 833 |
PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); |
| 834 |
coro_state_stash = gv_stashpv ("Coro::State", TRUE); |
| 835 |
|
| 836 |
newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); |
| 837 |
newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); |
| 838 |
newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); |
| 839 |
newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); |
| 840 |
|
| 841 |
if (!padlist_cache) |
| 842 |
padlist_cache = newHV (); |
| 843 |
|
| 844 |
main_mainstack = PL_mainstack; |
| 845 |
} |
| 846 |
|
| 847 |
Coro::State |
| 848 |
_newprocess(args) |
| 849 |
SV * args |
| 850 |
PROTOTYPE: $ |
| 851 |
CODE: |
| 852 |
Coro__State coro; |
| 853 |
|
| 854 |
if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) |
| 855 |
croak ("Coro::State::_newprocess expects an arrayref"); |
| 856 |
|
| 857 |
New (0, coro, 1, struct coro); |
| 858 |
|
| 859 |
coro->args = (AV *)SvREFCNT_inc (SvRV (args)); |
| 860 |
coro->mainstack = 0; /* actual work is done inside transfer */ |
| 861 |
coro->stack = 0; |
| 862 |
|
| 863 |
RETVAL = coro; |
| 864 |
OUTPUT: |
| 865 |
RETVAL |
| 866 |
|
| 867 |
void |
| 868 |
transfer(prev, next, flags) |
| 869 |
Coro::State_or_hashref prev |
| 870 |
Coro::State_or_hashref next |
| 871 |
int flags |
| 872 |
PROTOTYPE: @ |
| 873 |
CODE: |
| 874 |
PUTBACK; |
| 875 |
transfer (aTHX_ prev, next, flags); |
| 876 |
SPAGAIN; |
| 877 |
|
| 878 |
void |
| 879 |
DESTROY(coro) |
| 880 |
Coro::State coro |
| 881 |
CODE: |
| 882 |
|
| 883 |
if (coro->mainstack && coro->mainstack != main_mainstack) |
| 884 |
{ |
| 885 |
struct coro temp; |
| 886 |
|
| 887 |
SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); |
| 888 |
LOAD(aTHX_ coro); |
| 889 |
|
| 890 |
destroy_stacks (aTHX); |
| 891 |
|
| 892 |
LOAD((&temp)); /* this will get rid of defsv etc.. */ |
| 893 |
|
| 894 |
coro->mainstack = 0; |
| 895 |
} |
| 896 |
|
| 897 |
deallocate_stack (coro); |
| 898 |
|
| 899 |
Safefree (coro); |
| 900 |
|
| 901 |
void |
| 902 |
flush() |
| 903 |
CODE: |
| 904 |
#ifdef MAY_FLUSH |
| 905 |
flush_padlist_cache (); |
| 906 |
#endif |
| 907 |
|
| 908 |
void |
| 909 |
_exit(code) |
| 910 |
int code |
| 911 |
PROTOTYPE: $ |
| 912 |
CODE: |
| 913 |
#if defined(__GLIBC__) || _POSIX_C_SOURCE |
| 914 |
_exit (code); |
| 915 |
#else |
| 916 |
signal (SIGTERM, SIG_DFL); |
| 917 |
raise (SIGTERM); |
| 918 |
exit (code); |
| 919 |
#endif |
| 920 |
|
| 921 |
MODULE = Coro::State PACKAGE = Coro::Cont |
| 922 |
|
| 923 |
# this is slightly dirty (should expose a c-level api) |
| 924 |
|
| 925 |
void |
| 926 |
yield(...) |
| 927 |
PROTOTYPE: @ |
| 928 |
CODE: |
| 929 |
static SV *returnstk; |
| 930 |
SV *sv; |
| 931 |
AV *defav = GvAV (PL_defgv); |
| 932 |
struct coro *prev, *next; |
| 933 |
|
| 934 |
if (!returnstk) |
| 935 |
returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); |
| 936 |
|
| 937 |
/* set up @_ -- ugly */ |
| 938 |
av_clear (defav); |
| 939 |
av_fill (defav, items - 1); |
| 940 |
while (items--) |
| 941 |
av_store (defav, items, SvREFCNT_inc (ST(items))); |
| 942 |
|
| 943 |
mg_get (returnstk); /* isn't documentation wrong for mg_get? */ |
| 944 |
sv = av_pop ((AV *)SvRV (returnstk)); |
| 945 |
prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); |
| 946 |
next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); |
| 947 |
SvREFCNT_dec (sv); |
| 948 |
|
| 949 |
transfer(aTHX_ prev, next, 0); |
| 950 |
|
| 951 |
MODULE = Coro::State PACKAGE = Coro |
| 952 |
|
| 953 |
# this is slightly dirty (should expose a c-level api) |
| 954 |
|
| 955 |
BOOT: |
| 956 |
{ |
| 957 |
int i; |
| 958 |
HV *stash = gv_stashpv ("Coro", TRUE); |
| 959 |
|
| 960 |
newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); |
| 961 |
newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); |
| 962 |
newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); |
| 963 |
newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); |
| 964 |
newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); |
| 965 |
newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); |
| 966 |
|
| 967 |
coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); |
| 968 |
coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); |
| 969 |
|
| 970 |
for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) |
| 971 |
coro_ready[i] = newAV (); |
| 972 |
} |
| 973 |
|
| 974 |
void |
| 975 |
ready(self) |
| 976 |
SV * self |
| 977 |
CODE: |
| 978 |
coro_enq (SvREFCNT_inc (self)); |
| 979 |
|
| 980 |
void |
| 981 |
schedule(...) |
| 982 |
ALIAS: |
| 983 |
cede = 1 |
| 984 |
CODE: |
| 985 |
SV *prev, *next; |
| 986 |
|
| 987 |
prev = GvSV (coro_current); |
| 988 |
|
| 989 |
if (ix) |
| 990 |
coro_enq (SvREFCNT_inc (prev)); |
| 991 |
|
| 992 |
next = coro_deq (PRIO_MIN); |
| 993 |
|
| 994 |
if (!next) |
| 995 |
next = SvREFCNT_inc (GvSV (coro_idle)); |
| 996 |
|
| 997 |
GvSV (coro_current) = SvREFCNT_inc (next); |
| 998 |
transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), |
| 999 |
sv_to_coro (next, "Coro::schedule", "next coroutine"), |
| 1000 |
TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); |
| 1001 |
SvREFCNT_dec (next); |
| 1002 |
SvREFCNT_dec (prev); |
| 1003 |
|
