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Comparing Coro/Coro/State.xs (file contents):
Revision 1.23 by root, Tue Aug 14 04:33:58 2001 UTC vs.
Revision 1.50 by pcg, Sun Nov 30 16:59:15 2003 UTC

1#include "EXTERN.h" 1#include "EXTERN.h"
2#include "perl.h" 2#include "perl.h"
3#include "XSUB.h" 3#include "XSUB.h"
4 4
5#include "patchlevel.h"
6
7#if PATCHLEVEL < 6
8# ifndef PL_ppaddr
9# define PL_ppaddr ppaddr
10# endif
11# ifndef call_sv
12# define call_sv perl_call_sv
13# endif
14# ifndef get_sv
15# define get_sv perl_get_sv
16# endif
17# ifndef get_cv
18# define get_cv perl_get_cv
19# endif
20# ifndef IS_PADGV
21# define IS_PADGV(v) 0
22# endif
23# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0
25# endif
26#endif
27
5#include "libcoro/coro.c" 28#include "libcoro/coro.c"
6 29
7#include <signal.h> 30#include <signal.h>
8 31
9#ifdef HAVE_MMAP 32#ifdef HAVE_MMAP
10# include <unistd.h> 33# include <unistd.h>
11# include <sys/mman.h> 34# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 35# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
15# else 38# else
16# undef HAVE_MMAP 39# undef HAVE_MMAP
17# endif 40# endif
18# endif 41# endif
19#endif 42#endif
20 43
21#define MAY_FLUSH /* increases codesize */
22
23#define SUB_INIT "Coro::State::initialize" 44#define SUB_INIT "Coro::State::initialize"
24#define UCORO_STATE "_coro_state" 45#define UCORO_STATE "_coro_state"
25 46
26/* The next macro should delcare a variable stacklevel that contains and approximation 47/* The next macro should declare a variable stacklevel that contains and approximation
27 * to the current C stack pointer. Its property is that it changes with each call 48 * to the current C stack pointer. Its property is that it changes with each call
28 * and should be unique. */ 49 * and should be unique. */
29#define dSTACKLEVEL void *stacklevel = &stacklevel 50#define dSTACKLEVEL void *stacklevel = &stacklevel
51
52#define IN_DESTRUCT (PL_main_cv == Nullcv)
30 53
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 54#define labs(l) ((l) >= 0 ? (l) : -(l))
32 55
33#include "CoroAPI.h" 56#include "CoroAPI.h"
34 57
… …
45 void *sptr; 68 void *sptr;
46 long ssize; /* positive == mmap, otherwise malloc */ 69 long ssize; /* positive == mmap, otherwise malloc */
47} coro_stack; 70} coro_stack;
48 71
49struct coro { 72struct coro {
73 /* the top-level JMPENV for each coroutine, needed to catch dies. */
74 JMPENV start_env;
75
50 /* the optional C context */ 76 /* the optional C context */
51 coro_stack *stack; 77 coro_stack *stack;
52 void *cursp; 78 void *cursp;
53 int gencnt; 79 int gencnt;
54 80
… …
66 AV *curstack; 92 AV *curstack;
67 AV *mainstack; 93 AV *mainstack;
68 SV **stack_sp; 94 SV **stack_sp;
69 OP *op; 95 OP *op;
70 SV **curpad; 96 SV **curpad;
97 AV *comppad;
71 SV **stack_base; 98 SV **stack_base;
72 SV **stack_max; 99 SV **stack_max;
73 SV **tmps_stack; 100 SV **tmps_stack;
74 I32 tmps_floor; 101 I32 tmps_floor;
75 I32 tmps_ix; 102 I32 tmps_ix;
… …
99static AV *main_mainstack; /* used to differentiate between $main and others */ 126static AV *main_mainstack; /* used to differentiate between $main and others */
100static HV *coro_state_stash; 127static HV *coro_state_stash;
101static SV *ucoro_state_sv; 128static SV *ucoro_state_sv;
102static U32 ucoro_state_hash; 129static U32 ucoro_state_hash;
103static HV *padlist_cache; 130static HV *padlist_cache;
131static SV *coro_mortal; /* will be freed after next transfer */
104 132
105/* mostly copied from op.c:cv_clone2 */ 133/* mostly copied from op.c:cv_clone2 */
106STATIC AV * 134STATIC AV *
107clone_padlist (AV *protopadlist) 135clone_padlist (AV *protopadlist)
108{ 136{
… …
154 sv = (SV *) newAV (); 182 sv = (SV *) newAV ();
155 else if (*name == '%') 183 else if (*name == '%')
156 sv = (SV *) newHV (); 184 sv = (SV *) newHV ();
157 else 185 else
158 sv = NEWSV (0, 0); 186 sv = NEWSV (0, 0);
187#ifdef SvPADBUSY
159 if (!SvPADBUSY (sv)) 188 if (!SvPADBUSY (sv))
189#endif
160 SvPADMY_on (sv); 190 SvPADMY_on (sv);
161 npad[ix] = sv; 191 npad[ix] = sv;
162 } 192 }
163 } 193 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 194 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
… …
194#endif 224#endif
195 225
196 return newpadlist; 226 return newpadlist;
197} 227}
198 228
199#ifdef MAY_FLUSH 229STATIC void
200STATIC AV *
201free_padlist (AV *padlist) 230free_padlist (AV *padlist)
202{ 231{
203 /* may be during global destruction */ 232 /* may be during global destruction */
204 if (SvREFCNT(padlist)) 233 if (SvREFCNT (padlist))
205 { 234 {
206 I32 i = AvFILLp(padlist); 235 I32 i = AvFILLp (padlist);
207 while (i >= 0) 236 while (i >= 0)
208 { 237 {
209 SV **svp = av_fetch(padlist, i--, FALSE); 238 SV **svp = av_fetch (padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv) 239 if (svp)
240 {
241 SV *sv;
242 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
212 SvREFCNT_dec(sv); 243 SvREFCNT_dec (sv);
244
245 SvREFCNT_dec (*svp);
246 }
213 } 247 }
214 248
215 SvREFCNT_dec((SV*)padlist); 249 SvREFCNT_dec ((SV*)padlist);
216 } 250 }
217} 251}
218#endif 252
253STATIC int
254coro_cv_free (SV *sv, MAGIC *mg)
255{
256 AV *padlist;
257 AV *av = (AV *)mg->mg_obj;
258
259 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist);
262}
263
264#define PERL_MAGIC_coro PERL_MAGIC_ext
265
266static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
219 267
220/* the next two functions merely cache the padlists */ 268/* the next two functions merely cache the padlists */
221STATIC void 269STATIC void
222get_padlist (CV *cv) 270get_padlist (CV *cv)
223{ 271{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 272 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
225 273
226 if (he && AvFILLp ((AV *)*he) >= 0) 274 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 275 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
228 else 276 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv)); 277 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230} 278}
231 279
232STATIC void 280STATIC void
233put_padlist (CV *cv) 281put_padlist (CV *cv)
234{ 282{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1); 283 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
236 284
237 if (SvTYPE (*he) != SVt_PVAV) 285 if (!mg)
238 { 286 {
239 SvREFCNT_dec (*he); 287 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289 mg->mg_virtual = &vtbl_coro;
240 *he = (SV *)newAV (); 290 mg->mg_obj = (SV *)newAV ();
241 } 291 }
242 292
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv)); 293 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
244} 294}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271 295
272#define SB do { 296#define SB do {
273#define SE } while (0) 297#define SE } while (0)
274 298
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 299#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 300#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277 301
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 302#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
279 303
280static void 304static void
281load_state(pTHX_ Coro__State c) 305load_state(pTHX_ Coro__State c)
282{ 306{
283 PL_dowarn = c->dowarn; 307 PL_dowarn = c->dowarn;
… …
287 PL_curstack = c->curstack; 311 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack; 312 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp; 313 PL_stack_sp = c->stack_sp;
290 PL_op = c->op; 314 PL_op = c->op;
291 PL_curpad = c->curpad; 315 PL_curpad = c->curpad;
316 PL_comppad = c->comppad;
292 PL_stack_base = c->stack_base; 317 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max; 318 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack; 319 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor; 320 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix; 321 PL_tmps_ix = c->tmps_ix;
… …
355 380
356 PUSHs (Nullsv); 381 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 382 /* this loop was inspired by pp_caller */
358 for (;;) 383 for (;;)
359 { 384 {
360 do 385 while (cxix >= 0)
361 { 386 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 387 PERL_CONTEXT *cx = &ccstk[cxix--];
363 388
364 if (CxTYPE(cx) == CXt_SUB) 389 if (CxTYPE(cx) == CXt_SUB)
365 { 390 {
… …
384 PUSHs ((SV *)cv); 409 PUSHs ((SV *)cv);
385 410
386 get_padlist (cv); /* this is a monster */ 411 get_padlist (cv); /* this is a monster */
387 } 412 }
388 } 413 }
414#ifdef CXt_FORMAT
389 else if (CxTYPE(cx) == CXt_FORMAT) 415 else if (CxTYPE(cx) == CXt_FORMAT)
390 { 416 {
391 /* I never used formats, so how should I know how these are implemented? */ 417 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */ 418 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 419 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 } 420 }
421#endif
395 } 422 }
396 while (cxix >= 0);
397 423
398 if (top_si->si_type == PERLSI_MAIN) 424 if (top_si->si_type == PERLSI_MAIN)
399 break; 425 break;
400 426
401 top_si = top_si->si_prev; 427 top_si = top_si->si_prev;
… …
407 } 433 }
408 434
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 435 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 436 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 437 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413 /* I have not the slightest idea of why av_reify is necessary */
414 /* but if it's missing the defav contents magically get replaced sometimes */
415 if (c->defav)
416 av_reify (c->defav);
417 438
418 c->dowarn = PL_dowarn; 439 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval; 440 c->in_eval = PL_in_eval;
420 441
421 c->curstackinfo = PL_curstackinfo; 442 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack; 443 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack; 444 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp; 445 c->stack_sp = PL_stack_sp;
425 c->op = PL_op; 446 c->op = PL_op;
426 c->curpad = PL_curpad; 447 c->curpad = PL_curpad;
448 c->comppad = PL_comppad;
427 c->stack_base = PL_stack_base; 449 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max; 450 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack; 451 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor; 452 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix; 453 c->tmps_ix = PL_tmps_ix;
… …
471 493
472 New(54,PL_markstack,16,I32); 494 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack; 495 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16; 496 PL_markstack_max = PL_markstack + 16;
475 497
498#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 499 SET_MARK_OFFSET;
500#endif
477 501
478 New(54,PL_scopestack,16,I32); 502 New(54,PL_scopestack,16,I32);
479 PL_scopestack_ix = 0; 503 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16; 504 PL_scopestack_max = 16;
481 505
… …
488 PL_retstack_max = 8; 512 PL_retstack_max = 8;
489} 513}
490 514
491/* 515/*
492 * destroy the stacks, the callchain etc... 516 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */ 517 */
495STATIC void 518STATIC void
496destroy_stacks(pTHX) 519destroy_stacks(pTHX)
497{ 520{
521 if (!IN_DESTRUCT)
522 {
498 /* is this ugly, I ask? */ 523 /* is this ugly, I ask? */
499 while (PL_scopestack_ix) 524 while (PL_scopestack_ix)
500 LEAVE; 525 LEAVE;
501 526
502 /* sure it is, but more important: is it correct?? :/ */ 527 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ 528 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS; 529 FREETMPS;
530 }
505 531
506 while (PL_curstackinfo->si_next) 532 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 533 PL_curstackinfo = PL_curstackinfo->si_next;
508 534
509 while (PL_curstackinfo) 535 while (PL_curstackinfo)
… …
514 dSP; 540 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 541 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */ 542 PUTBACK; /* possibly superfluous */
517 } 543 }
518 544
545 if (!IN_DESTRUCT)
546 {
519 dounwind(-1); 547 dounwind(-1);
520
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 548 SvREFCNT_dec(PL_curstackinfo->si_stack);
549 }
550
522 Safefree(PL_curstackinfo->si_cxstack); 551 Safefree(PL_curstackinfo->si_cxstack);
523 Safefree(PL_curstackinfo); 552 Safefree(PL_curstackinfo);
524 PL_curstackinfo = p; 553 PL_curstackinfo = p;
525 } 554 }
526 555
… …
541 stack->refcnt = 1; 570 stack->refcnt = 1;
542 stack->usecnt = 1; 571 stack->usecnt = 1;
543 stack->gencnt = ctx->gencnt = 0; 572 stack->gencnt = ctx->gencnt = 0;
544 if (alloc) 573 if (alloc)
545 { 574 {
546#ifdef HAVE_MMAP 575#if HAVE_MMAP
547 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */ 576 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
548 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); 577 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
549 if (stack->sptr == (void *)-1) 578 if (stack->sptr == (void *)-1)
550#endif 579#endif
551 { 580 {
552 /*FIXME*//*D*//* reasonable stack size! */ 581 /*FIXME*//*D*//* reasonable stack size! */
553 stack->ssize = -4096 * sizeof (long); 582 stack->ssize = -4096 * sizeof (long);
… …
573 { 602 {
574#ifdef HAVE_MMAP 603#ifdef HAVE_MMAP
575 if (stack->ssize > 0 && stack->sptr) 604 if (stack->ssize > 0 && stack->sptr)
576 munmap (stack->sptr, stack->ssize); 605 munmap (stack->sptr, stack->ssize);
577 else 606 else
578#else 607#endif
579 Safefree (stack->sptr); 608 Safefree (stack->sptr);
580#endif 609
581 Safefree (stack); 610 Safefree (stack);
582 } 611 }
583 else if (ctx->gencnt == stack->gencnt) 612 else if (ctx->gencnt == stack->gencnt)
584 --stack->usecnt; 613 --stack->usecnt;
585 } 614 }
… …
597 626
598 coro_init_stacks (aTHX); 627 coro_init_stacks (aTHX);
599 /*PL_curcop = 0;*/ 628 /*PL_curcop = 0;*/
600 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 629 /*PL_in_eval = PL_in_eval;*/ /* inherit */
601 SvREFCNT_dec (GvAV (PL_defgv)); 630 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = ctx->args; 631 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
603 632
604 SPAGAIN; 633 SPAGAIN;
605 634
606 if (ctx->stack) 635 if (ctx->stack)
607 { 636 {
… …
634 * that doesn't matter, though, since it is only 663 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return... 664 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;) 665 * ah yes, and I don't care anyways ;)
637 */ 666 */
638 PUTBACK; 667 PUTBACK;
639 PL_op = pp_entersub(); 668 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640 SPAGAIN; 669 SPAGAIN;
641 670
642 ENTER; /* necessary e.g. for dounwind */ 671 ENTER; /* necessary e.g. for dounwind */
643 } 672 }
644} 673}
… …
648{ 677{
649 /* 678 /*
650 * this is a _very_ stripped down perl interpreter ;) 679 * this is a _very_ stripped down perl interpreter ;)
651 */ 680 */
652 Coro__State ctx = (Coro__State)arg; 681 Coro__State ctx = (Coro__State)arg;
682 JMPENV coro_start_env;
653 683
654 /*FIXME*//* must set up top_env here */ 684 PL_top_env = &ctx->start_env;
685
655 ctx->cursp = 0; 686 ctx->cursp = 0;
656 PL_op = PL_op->op_next; 687 PL_op = PL_op->op_next;
657 CALLRUNOPS(aTHX); 688 CALLRUNOPS(aTHX);
658 689
659 abort (); 690 abort ();
660} 691}
661 692
662STATIC void 693STATIC void
663transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 694transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
664{ 695{
665 dSP;
666 dSTACKLEVEL; 696 dSTACKLEVEL;
697 static struct coro *xnext;
667 698
668 if (prev != next) 699 if (prev != next)
669 { 700 {
701 xnext = next;
702
670 if (next->mainstack) 703 if (next->mainstack)
671 { 704 {
672 SAVE (prev, flags); 705 SAVE (prev, flags);
673 LOAD (next); 706 LOAD (next);
674 707
… …
697 continue_coro, (void *)next, 730 continue_coro, (void *)next,
698 next->stack->sptr, labs (next->stack->ssize)); 731 next->stack->sptr, labs (next->stack->ssize));
699 } 732 }
700 733
701 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 734 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
735 /* don't add any code here */
702 } 736 }
703 737
704 } 738 }
705 else if (next->tmps_ix == -2) 739 else if (next->tmps_ix == -2)
706 croak ("tried to transfer to running coroutine"); 740 croak ("tried to transfer to running coroutine");
… …
713 if (!prev->stack) 747 if (!prev->stack)
714 allocate_stack (prev, 0); 748 allocate_stack (prev, 0);
715 749
716 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 750 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
717 { 751 {
752 PL_top_env = &next->start_env;
753
718 setup_coro (next); 754 setup_coro (next);
719 755
720 prev->stack->refcnt++; 756 prev->stack->refcnt++;
721 prev->stack->usecnt++; 757 prev->stack->usecnt++;
722 next->stack = prev->stack; 758 next->stack = prev->stack;
723 next->gencnt = prev->gencnt; 759 next->gencnt = prev->gencnt;
724 } 760 }
725 else 761 else
726 { 762 {
763 assert (!next->stack);
727 allocate_stack (next, 1); 764 allocate_stack (next, 1);
728 coro_create (&(next->stack->cctx), 765 coro_create (&(next->stack->cctx),
729 setup_coro, (void *)next, 766 setup_coro, (void *)next,
730 next->stack->sptr, labs (next->stack->ssize)); 767 next->stack->sptr, labs (next->stack->ssize));
731 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 768 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
769 /* don't add any code here */
732 } 770 }
733 } 771 }
734 else 772 else
735 setup_coro (next); 773 setup_coro (next);
736 } 774 }
775
776 /*
777 * xnext is now either prev or next, depending on wether
778 * we switched the c stack or not. that's why I use a global
779 * variable, that should become thread-specific at one point.
780 */
781 xnext->cursp = stacklevel;
737 } 782 }
738 783
739 next->cursp = stacklevel; 784 if (coro_mortal)
740}
741
742static struct coro *
743sv_to_coro (SV *arg, const char *funcname, const char *varname)
744{
745 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
746 { 785 {
747 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 786 SvREFCNT_dec (coro_mortal);
748 787 coro_mortal = 0;
749 if (!he)
750 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
751
752 arg = HeVAL(he);
753 } 788 }
754 789}
790
791#define SV_CORO(sv,func) \
792 do { \
793 if (SvROK (sv)) \
794 sv = SvRV (sv); \
795 \
796 if (SvTYPE(sv) == SVt_PVHV) \
797 { \
798 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
799 \
800 if (!he) \
801 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
802 \
803 (sv) = SvRV (HeVAL(he)); \
804 } \
805 \
755 /* must also be changed inside Coro::Cont::yield */ 806 /* must also be changed inside Coro::Cont::yield */ \
756 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 807 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
757 return (struct coro *) SvIV((SV*)SvRV(arg));
758 else
759 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 808 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
760} 809 \
810 } while(0)
811
812#define SvSTATE(sv) (struct coro *)SvIV (sv)
761 813
762static void 814static void
763api_transfer(pTHX_ SV *prev, SV *next, int flags) 815api_transfer(pTHX_ SV *prev, SV *next, int flags)
764{ 816{
765 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"), 817 SV_CORO (prev, "Coro::transfer");
766 sv_to_coro (next, "Coro::transfer", "next"), 818 SV_CORO (next, "Coro::transfer");
767 flags); 819
820 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
768} 821}
769 822
770/** Coro ********************************************************************/ 823/** Coro ********************************************************************/
771 824
772#define PRIO_MAX 3 825#define PRIO_MAX 3
… …
777#define PRIO_MIN -4 830#define PRIO_MIN -4
778 831
779/* for Coro.pm */ 832/* for Coro.pm */
780static GV *coro_current, *coro_idle; 833static GV *coro_current, *coro_idle;
781static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 834static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
835static int coro_nready;
782 836
783static void 837static void
784coro_enq (SV *sv) 838coro_enq (SV *sv)
785{ 839{
786 if (SvROK (sv)) 840 if (SvTYPE (sv) == SVt_PVHV)
787 { 841 {
788 SV *hv = SvRV (sv);
789 if (SvTYPE (hv) == SVt_PVHV)
790 {
791 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 842 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
792 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 843 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
793 844
794 prio = prio > PRIO_MAX ? PRIO_MAX 845 prio = prio > PRIO_MAX ? PRIO_MAX
795 : prio < PRIO_MIN ? PRIO_MIN 846 : prio < PRIO_MIN ? PRIO_MIN
796 : prio; 847 : prio;
797 848
798 av_push (coro_ready [prio - PRIO_MIN], sv); 849 av_push (coro_ready [prio - PRIO_MIN], sv);
850 coro_nready++;
799 851
800 return; 852 return;
801 }
802 } 853 }
803 854
804 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 855 croak ("Coro::ready tried to enqueue something that is not a coroutine");
805} 856}
806 857
… …
813 if (min_prio < 0) 864 if (min_prio < 0)
814 min_prio = 0; 865 min_prio = 0;
815 866
816 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 867 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
817 if (av_len (coro_ready[prio]) >= 0) 868 if (av_len (coro_ready[prio]) >= 0)
869 {
870 coro_nready--;
818 return av_shift (coro_ready[prio]); 871 return av_shift (coro_ready[prio]);
872 }
819 873
820 return 0; 874 return 0;
821} 875}
822 876
823static void 877static void
824api_ready (SV *coro) 878api_ready (SV *coro)
825{ 879{
880 if (SvROK (coro))
881 coro = SvRV (coro);
882
826 coro_enq (SvREFCNT_inc (coro)); 883 coro_enq (SvREFCNT_inc (coro));
827} 884}
828 885
829static void 886static void
830api_schedule (int cede) 887api_schedule (void)
831{ 888{
832 SV *prev, *next; 889 SV *prev, *next;
833 890
834 prev = GvSV (coro_current); 891 prev = SvRV (GvSV (coro_current));
835
836 if (cede)
837 coro_enq (SvREFCNT_inc (prev));
838
839 next = coro_deq (PRIO_MIN); 892 next = coro_deq (PRIO_MIN);
840 893
841 if (!next) 894 if (!next)
842 next = SvREFCNT_inc (GvSV (coro_idle)); 895 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
843 896
844 GvSV (coro_current) = SvREFCNT_inc (next); 897 /* free this only after the transfer */
845 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 898 coro_mortal = prev;
846 sv_to_coro (next, "Coro::schedule", "next coroutine"), 899 SV_CORO (prev, "Coro::schedule");
900
901 SvRV (GvSV (coro_current)) = next;
902
903 SV_CORO (next, "Coro::schedule");
904
905 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
847 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 906 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
848 SvREFCNT_dec (next); 907}
849 SvREFCNT_dec (prev); 908
909static void
910api_cede (void)
911{
912 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
913
914 api_schedule ();
850} 915}
851 916
852MODULE = Coro::State PACKAGE = Coro::State 917MODULE = Coro::State PACKAGE = Coro::State
853 918
854PROTOTYPES: ENABLE 919PROTOTYPES: ENABLE
… …
867 if (!padlist_cache) 932 if (!padlist_cache)
868 padlist_cache = newHV (); 933 padlist_cache = newHV ();
869 934
870 main_mainstack = PL_mainstack; 935 main_mainstack = PL_mainstack;
871 936
872 {
873 SV *sv = perl_get_sv("Coro::API", 1);
874
875 coroapi.ver = CORO_API_VERSION - 1; 937 coroapi.ver = CORO_API_VERSION;
876 coroapi.transfer = api_transfer; 938 coroapi.transfer = api_transfer;
877 coroapi.schedule = api_schedule;
878 coroapi.ready = api_ready;
879
880 GCoroAPI = &coroapi;
881 sv_setiv(sv, (IV)&coroapi);
882 SvREADONLY_on(sv);
883 }
884} 939}
885 940
886Coro::State 941Coro::State
887_newprocess(args) 942_newprocess(args)
888 SV * args 943 SV * args
… …
891 Coro__State coro; 946 Coro__State coro;
892 947
893 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 948 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
894 croak ("Coro::State::_newprocess expects an arrayref"); 949 croak ("Coro::State::_newprocess expects an arrayref");
895 950
896 New (0, coro, 1, struct coro); 951 Newz (0, coro, 1, struct coro);
897 952
898 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 953 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
899 coro->mainstack = 0; /* actual work is done inside transfer */ 954 coro->mainstack = 0; /* actual work is done inside transfer */
900 coro->stack = 0; 955 coro->stack = 0;
901 956
957 /* same as JMPENV_BOOTSTRAP */
958 /* we might be able to recycle start_env, but safe is safe */
959 //Zero(&coro->start_env, 1, JMPENV);
960 coro->start_env.je_ret = -1;
961 coro->start_env.je_mustcatch = TRUE;
962
902 RETVAL = coro; 963 RETVAL = coro;
903 OUTPUT: 964 OUTPUT:
904 RETVAL 965 RETVAL
905 966
906void 967void
907transfer(prev, next, flags) 968transfer(prev, next, flags)
908 Coro::State_or_hashref prev 969 SV *prev
909 Coro::State_or_hashref next 970 SV *next
910 int flags 971 int flags
911 PROTOTYPE: @ 972 PROTOTYPE: @
912 CODE: 973 CODE:
913 PUTBACK; 974 PUTBACK;
975 SV_CORO (next, "Coro::transfer");
976 SV_CORO (prev, "Coro::transfer");
914 transfer (aTHX_ prev, next, flags); 977 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
915 SPAGAIN; 978 SPAGAIN;
916 979
917void 980void
918DESTROY(coro) 981DESTROY(coro)
919 Coro::State coro 982 Coro::State coro
… …
921 984
922 if (coro->mainstack && coro->mainstack != main_mainstack) 985 if (coro->mainstack && coro->mainstack != main_mainstack)
923 { 986 {
924 struct coro temp; 987 struct coro temp;
925 988
989 PUTBACK;
926 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 990 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
927 LOAD(aTHX_ coro); 991 LOAD(aTHX_ coro);
992 SPAGAIN;
928 993
929 destroy_stacks (aTHX); 994 destroy_stacks (aTHX);
930 995
931 LOAD((&temp)); /* this will get rid of defsv etc.. */ 996 LOAD((&temp)); /* this will get rid of defsv etc.. */
997 SPAGAIN;
932 998
933 coro->mainstack = 0; 999 coro->mainstack = 0;
934 } 1000 }
935 1001
936 deallocate_stack (coro); 1002 deallocate_stack (coro);
937 1003 SvREFCNT_dec (coro->args);
938 Safefree (coro); 1004 Safefree (coro);
939
940void
941flush()
942 CODE:
943#ifdef MAY_FLUSH
944 flush_padlist_cache ();
945#endif
946 1005
947void 1006void
948_exit(code) 1007_exit(code)
949 int code 1008 int code
950 PROTOTYPE: $ 1009 PROTOTYPE: $
… …
969 SV *sv; 1028 SV *sv;
970 AV *defav = GvAV (PL_defgv); 1029 AV *defav = GvAV (PL_defgv);
971 struct coro *prev, *next; 1030 struct coro *prev, *next;
972 1031
973 if (!returnstk) 1032 if (!returnstk)
974 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1033 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
975 1034
976 /* set up @_ -- ugly */ 1035 /* set up @_ -- ugly */
977 av_clear (defav); 1036 av_clear (defav);
978 av_fill (defav, items - 1); 1037 av_fill (defav, items - 1);
979 while (items--) 1038 while (items--)
… …
1006 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1065 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1007 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1066 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1008 1067
1009 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1068 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1010 coro_ready[i] = newAV (); 1069 coro_ready[i] = newAV ();
1070
1071 {
1072 SV *sv = perl_get_sv("Coro::API", 1);
1073
1074 coroapi.schedule = api_schedule;
1075 coroapi.cede = api_cede;
1076 coroapi.ready = api_ready;
1077 coroapi.nready = &coro_nready;
1078 coroapi.current = coro_current;
1079
1080 GCoroAPI = &coroapi;
1081 sv_setiv(sv, (IV)&coroapi);
1082 SvREADONLY_on(sv);
1083 }
1011} 1084}
1085
1086#if !PERL_MICRO
1012 1087
1013void 1088void
1014ready(self) 1089ready(self)
1015 SV * self 1090 SV * self
1091 PROTOTYPE: $
1016 CODE: 1092 CODE:
1017 api_ready (self); 1093 api_ready (self);
1018 1094
1095#endif
1096
1097int
1098nready(...)
1099 PROTOTYPE:
1100 CODE:
1101 RETVAL = coro_nready;
1102 OUTPUT:
1103 RETVAL
1104
1019void 1105void
1020schedule(...) 1106schedule(...)
1021 ALIAS: 1107 PROTOTYPE:
1022 cede = 1
1023 CODE: 1108 CODE:
1024 api_schedule (ix); 1109 api_schedule ();
1025 1110
1111void
1112cede(...)
1113 PROTOTYPE:
1114 CODE:
1115 api_cede ();
1116

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