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Comparing Coro/Coro/State.xs (file contents):
Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs.
Revision 1.42 by root, Mon Dec 31 20:41:45 2001 UTC

… …
7#include <signal.h> 7#include <signal.h>
8 8
9#ifdef HAVE_MMAP 9#ifdef HAVE_MMAP
10# include <unistd.h> 10# include <unistd.h>
11# include <sys/mman.h> 11# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 12# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 13# ifdef MAP_ANON
14# define MAP_ANONYMOUS MAP_ANON
15# else 15# else
16# undef HAVE_MMAP 16# undef HAVE_MMAP
17# endif 17# endif
18# endif 18# endif
19#endif 19#endif
20 20
21#define MAY_FLUSH /* increases codesize */ 21#define MAY_FLUSH /* increases codesize and is rarely used */
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 22
38#define SUB_INIT "Coro::State::initialize" 23#define SUB_INIT "Coro::State::initialize"
39#define UCORO_STATE "_coro_state" 24#define UCORO_STATE "_coro_state"
40 25
41/* The next macro should delcare a variable stacklevel that contains and approximation 26/* The next macro should declare a variable stacklevel that contains and approximation
42 * to the current C stack pointer. It's property is that it changes with each call 27 * to the current C stack pointer. Its property is that it changes with each call
43 * and should be unique. */ 28 * and should be unique. */
44#define dSTACKLEVEL void *stacklevel = &stacklevel 29#define dSTACKLEVEL void *stacklevel = &stacklevel
45 30
31#define IN_DESTRUCT (PL_main_cv == Nullcv)
32
46#define labs(l) ((l) >= 0 ? (l) : -(l)) 33#define labs(l) ((l) >= 0 ? (l) : -(l))
34
35#include "CoroAPI.h"
36
37static struct CoroAPI coroapi;
47 38
48/* this is actually not only the c stack but also c registers etc... */ 39/* this is actually not only the c stack but also c registers etc... */
49typedef struct { 40typedef struct {
50 int refcnt; /* pointer reference counter */ 41 int refcnt; /* pointer reference counter */
51 int usecnt; /* shared by how many coroutines */ 42 int usecnt; /* shared by how many coroutines */
… …
110static AV *main_mainstack; /* used to differentiate between $main and others */ 101static AV *main_mainstack; /* used to differentiate between $main and others */
111static HV *coro_state_stash; 102static HV *coro_state_stash;
112static SV *ucoro_state_sv; 103static SV *ucoro_state_sv;
113static U32 ucoro_state_hash; 104static U32 ucoro_state_hash;
114static HV *padlist_cache; 105static HV *padlist_cache;
115 106static SV *coro_mortal; /* will be freed after next transfer */
116/* for Coro.pm */
117static GV *coro_current, *coro_idle;
118static AV *coro_ready;
119 107
120/* mostly copied from op.c:cv_clone2 */ 108/* mostly copied from op.c:cv_clone2 */
121STATIC AV * 109STATIC AV *
122clone_padlist (AV *protopadlist) 110clone_padlist (AV *protopadlist)
123{ 111{
… …
210 198
211 return newpadlist; 199 return newpadlist;
212} 200}
213 201
214#ifdef MAY_FLUSH 202#ifdef MAY_FLUSH
215STATIC AV * 203STATIC void
216free_padlist (AV *padlist) 204free_padlist (AV *padlist)
217{ 205{
218 /* may be during global destruction */ 206 /* may be during global destruction */
219 if (SvREFCNT(padlist)) 207 if (SvREFCNT(padlist))
220 { 208 {
… …
285#endif 273#endif
286 274
287#define SB do { 275#define SB do {
288#define SE } while (0) 276#define SE } while (0)
289 277
290#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 278#define LOAD(state) load_state(aTHX_ (state));
291#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 279#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
292 280
293#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 281#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
294 282
295static void 283static void
296load_state(pTHX_ Coro__State c) 284load_state(pTHX_ Coro__State c)
… …
370 358
371 PUSHs (Nullsv); 359 PUSHs (Nullsv);
372 /* this loop was inspired by pp_caller */ 360 /* this loop was inspired by pp_caller */
373 for (;;) 361 for (;;)
374 { 362 {
375 do 363 while (cxix >= 0)
376 { 364 {
377 PERL_CONTEXT *cx = &ccstk[cxix--]; 365 PERL_CONTEXT *cx = &ccstk[cxix--];
378 366
379 if (CxTYPE(cx) == CXt_SUB) 367 if (CxTYPE(cx) == CXt_SUB)
380 { 368 {
… …
406 /* I never used formats, so how should I know how these are implemented? */ 394 /* I never used formats, so how should I know how these are implemented? */
407 /* my bold guess is as a simple, plain sub... */ 395 /* my bold guess is as a simple, plain sub... */
408 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 396 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
409 } 397 }
410 } 398 }
411 while (cxix >= 0);
412 399
413 if (top_si->si_type == PERLSI_MAIN) 400 if (top_si->si_type == PERLSI_MAIN)
414 break; 401 break;
415 402
416 top_si = top_si->si_prev; 403 top_si = top_si->si_prev;
… …
422 } 409 }
423 410
424 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 411 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
425 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 412 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
426 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 413 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
427
428 /* I have not the slightest idea of why av_reify is necessary */
429 /* but if it's missing the defav contents magically get replaced sometimes */
430 if (c->defav)
431 av_reify (c->defav);
432 414
433 c->dowarn = PL_dowarn; 415 c->dowarn = PL_dowarn;
434 c->in_eval = PL_in_eval; 416 c->in_eval = PL_in_eval;
435 417
436 c->curstackinfo = PL_curstackinfo; 418 c->curstackinfo = PL_curstackinfo;
… …
508 * still there is a memleak of 128 bytes... 490 * still there is a memleak of 128 bytes...
509 */ 491 */
510STATIC void 492STATIC void
511destroy_stacks(pTHX) 493destroy_stacks(pTHX)
512{ 494{
495 if (!IN_DESTRUCT)
496 {
513 /* is this ugly, I ask? */ 497 /* is this ugly, I ask? */
514 while (PL_scopestack_ix) 498 while (PL_scopestack_ix)
515 LEAVE; 499 LEAVE;
516 500
517 /* sure it is, but more important: is it correct?? :/ */ 501 /* sure it is, but more important: is it correct?? :/ */
518 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ 502 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
519 FREETMPS; 503 FREETMPS;
504 }
520 505
521 while (PL_curstackinfo->si_next) 506 while (PL_curstackinfo->si_next)
522 PL_curstackinfo = PL_curstackinfo->si_next; 507 PL_curstackinfo = PL_curstackinfo->si_next;
523 508
524 while (PL_curstackinfo) 509 while (PL_curstackinfo)
… …
529 dSP; 514 dSP;
530 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
531 PUTBACK; /* possibly superfluous */ 516 PUTBACK; /* possibly superfluous */
532 } 517 }
533 518
519 if (!IN_DESTRUCT)
520 {
534 dounwind(-1); 521 dounwind(-1);
535
536 SvREFCNT_dec(PL_curstackinfo->si_stack); 522 SvREFCNT_dec(PL_curstackinfo->si_stack);
523 }
524
537 Safefree(PL_curstackinfo->si_cxstack); 525 Safefree(PL_curstackinfo->si_cxstack);
538 Safefree(PL_curstackinfo); 526 Safefree(PL_curstackinfo);
539 PL_curstackinfo = p; 527 PL_curstackinfo = p;
540 } 528 }
541 529
… …
556 stack->refcnt = 1; 544 stack->refcnt = 1;
557 stack->usecnt = 1; 545 stack->usecnt = 1;
558 stack->gencnt = ctx->gencnt = 0; 546 stack->gencnt = ctx->gencnt = 0;
559 if (alloc) 547 if (alloc)
560 { 548 {
561#ifdef HAVE_MMAP 549#if HAVE_MMAP
562 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */ 550 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
563 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); 551 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
564 if (stack->sptr == (void *)-1) 552 if (stack->sptr == (void *)-1)
565#endif 553#endif
566 { 554 {
567 /*FIXME*//*D*//* reasonable stack size! */ 555 /*FIXME*//*D*//* reasonable stack size! */
568 stack->ssize = -4096 * sizeof (long); 556 stack->ssize = -4096 * sizeof (long);
… …
649 * that doesn't matter, though, since it is only 637 * that doesn't matter, though, since it is only
650 * pp_nextstate and we never return... 638 * pp_nextstate and we never return...
651 * ah yes, and I don't care anyways ;) 639 * ah yes, and I don't care anyways ;)
652 */ 640 */
653 PUTBACK; 641 PUTBACK;
654 PL_op = pp_entersub(); 642 PL_op = PL_ppaddr[OP_ENTERSUB]();
655 SPAGAIN; 643 SPAGAIN;
656 644
657 ENTER; /* necessary e.g. for dounwind */ 645 ENTER; /* necessary e.g. for dounwind */
658 } 646 }
659} 647}
… …
663{ 651{
664 /* 652 /*
665 * this is a _very_ stripped down perl interpreter ;) 653 * this is a _very_ stripped down perl interpreter ;)
666 */ 654 */
667 Coro__State ctx = (Coro__State)arg; 655 Coro__State ctx = (Coro__State)arg;
656 JMPENV coro_start_env;
668 657
669 /*FIXME*//* must set up top_env here */ 658 /* same as JMPENV_BOOTSTRAP */
659 Zero(&coro_start_env, 1, JMPENV);
660 coro_start_env.je_ret = -1;
661 coro_start_env.je_mustcatch = TRUE;
662 PL_top_env = &coro_start_env;
663
670 ctx->cursp = 0; 664 ctx->cursp = 0;
671 PL_op = PL_op->op_next; 665 PL_op = PL_op->op_next;
672 CALLRUNOPS(aTHX); 666 CALLRUNOPS(aTHX);
673 667
674 abort (); 668 abort ();
675} 669}
676 670
677STATIC void 671STATIC void
678transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 672transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
679{ 673{
680 dSP;
681 dSTACKLEVEL; 674 dSTACKLEVEL;
675 static struct coro *xnext;
682 676
683 if (prev != next) 677 if (prev != next)
684 { 678 {
679 xnext = next;
680
685 if (next->mainstack) 681 if (next->mainstack)
686 { 682 {
687 SAVE (prev, flags); 683 SAVE (prev, flags);
688 LOAD (next); 684 LOAD (next);
689 685
… …
712 continue_coro, (void *)next, 708 continue_coro, (void *)next,
713 next->stack->sptr, labs (next->stack->ssize)); 709 next->stack->sptr, labs (next->stack->ssize));
714 } 710 }
715 711
716 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713 /* don't add any code here */
717 } 714 }
718 715
719 } 716 }
720 else if (next->tmps_ix == -2) 717 else if (next->tmps_ix == -2)
721 croak ("tried to transfer to running coroutine"); 718 croak ("tried to transfer to running coroutine");
… …
742 allocate_stack (next, 1); 739 allocate_stack (next, 1);
743 coro_create (&(next->stack->cctx), 740 coro_create (&(next->stack->cctx),
744 setup_coro, (void *)next, 741 setup_coro, (void *)next,
745 next->stack->sptr, labs (next->stack->ssize)); 742 next->stack->sptr, labs (next->stack->ssize));
746 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 /* don't add any code here */
747 } 745 }
748 } 746 }
749 else 747 else
750 setup_coro (next); 748 setup_coro (next);
751 } 749 }
752 }
753 750
751 /*
752 * xnext is now either prev or next, depending on wether
753 * we switched the c stack or not. that's why I use a global
754 * variable, that should become thread-specific at one point.
755 */
754 next->cursp = stacklevel; 756 xnext->cursp = stacklevel;
755} 757 }
756 758
757static struct coro * 759 if (coro_mortal)
758sv_to_coro (SV *arg, const char *funcname, const char *varname)
759{
760 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
761 { 760 {
761 SvREFCNT_dec (coro_mortal);
762 coro_mortal = 0;
763 }
764}
765
766#define SV_CORO(sv,func) \
767 do { \
768 if (SvROK (sv)) \
769 sv = SvRV (sv); \
770 \
771 if (SvTYPE(sv) == SVt_PVHV) \
772 { \
762 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 773 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
763 774 \
764 if (!he) 775 if (!he) \
765 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 776 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
766 777 \
767 arg = HeVAL(he); 778 (sv) = SvRV (HeVAL(he)); \
768 } 779 } \
769 780 \
770 /* must also be changed inside Coro::Cont::yield */ 781 /* must also be changed inside Coro::Cont::yield */ \
771 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 782 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
772 return (struct coro *) SvIV((SV*)SvRV(arg));
773 else
774 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 783 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
784 \
785 } while(0)
786
787#define SvSTATE(sv) (struct coro *)SvIV (sv)
788
789static void
790api_transfer(pTHX_ SV *prev, SV *next, int flags)
791{
792 SV_CORO (prev, "Coro::transfer");
793 SV_CORO (next, "Coro::transfer");
794
795 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
796}
797
798/** Coro ********************************************************************/
799
800#define PRIO_MAX 3
801#define PRIO_HIGH 1
802#define PRIO_NORMAL 0
803#define PRIO_LOW -1
804#define PRIO_IDLE -3
805#define PRIO_MIN -4
806
807/* for Coro.pm */
808static GV *coro_current, *coro_idle;
809static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
810static int coro_nready;
811
812static void
813coro_enq (SV *sv)
814{
815 if (SvTYPE (sv) == SVt_PVHV)
816 {
817 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
818 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
819
820 prio = prio > PRIO_MAX ? PRIO_MAX
821 : prio < PRIO_MIN ? PRIO_MIN
822 : prio;
823
824 av_push (coro_ready [prio - PRIO_MIN], sv);
825 coro_nready++;
826
827 return;
828 }
829
830 croak ("Coro::ready tried to enqueue something that is not a coroutine");
831}
832
833static SV *
834coro_deq (int min_prio)
835{
836 int prio = PRIO_MAX - PRIO_MIN;
837
838 min_prio -= PRIO_MIN;
839 if (min_prio < 0)
840 min_prio = 0;
841
842 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
843 if (av_len (coro_ready[prio]) >= 0)
844 {
845 coro_nready--;
846 return av_shift (coro_ready[prio]);
847 }
848
849 return 0;
850}
851
852static void
853api_ready (SV *coro)
854{
855 if (SvROK (coro))
856 coro = SvRV (coro);
857
858 coro_enq (SvREFCNT_inc (coro));
859}
860
861static void
862api_schedule (void)
863{
864 SV *prev, *next;
865
866 prev = SvRV (GvSV (coro_current));
867 next = coro_deq (PRIO_MIN);
868
869 if (!next)
870 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
871
872 /* free this only after the transfer */
873 coro_mortal = prev;
874 SV_CORO (prev, "Coro::schedule");
875
876 SvRV (GvSV (coro_current)) = next;
877
878 SV_CORO (next, "Coro::schedule");
879
880 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
881 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
882}
883
884static void
885api_cede (void)
886{
887 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
888
889 api_schedule ();
775} 890}
776 891
777MODULE = Coro::State PACKAGE = Coro::State 892MODULE = Coro::State PACKAGE = Coro::State
778 893
779PROTOTYPES: ENABLE 894PROTOTYPES: ENABLE
… …
791 906
792 if (!padlist_cache) 907 if (!padlist_cache)
793 padlist_cache = newHV (); 908 padlist_cache = newHV ();
794 909
795 main_mainstack = PL_mainstack; 910 main_mainstack = PL_mainstack;
911
912 coroapi.ver = CORO_API_VERSION;
913 coroapi.transfer = api_transfer;
796} 914}
797 915
798Coro::State 916Coro::State
799_newprocess(args) 917_newprocess(args)
800 SV * args 918 SV * args
… …
815 OUTPUT: 933 OUTPUT:
816 RETVAL 934 RETVAL
817 935
818void 936void
819transfer(prev, next, flags) 937transfer(prev, next, flags)
820 Coro::State_or_hashref prev 938 SV *prev
821 Coro::State_or_hashref next 939 SV *next
822 int flags 940 int flags
823 PROTOTYPE: @ 941 PROTOTYPE: @
824 CODE: 942 CODE:
825 PUTBACK; 943 PUTBACK;
944 SV_CORO (next, "Coro::transfer");
945 SV_CORO (prev, "Coro::transfer");
826 transfer (aTHX_ prev, next, flags); 946 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
827 SPAGAIN; 947 SPAGAIN;
828 948
829void 949void
830DESTROY(coro) 950DESTROY(coro)
831 Coro::State coro 951 Coro::State coro
… …
833 953
834 if (coro->mainstack && coro->mainstack != main_mainstack) 954 if (coro->mainstack && coro->mainstack != main_mainstack)
835 { 955 {
836 struct coro temp; 956 struct coro temp;
837 957
958 PUTBACK;
838 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 959 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
839 LOAD(aTHX_ coro); 960 LOAD(aTHX_ coro);
961 SPAGAIN;
840 962
841 destroy_stacks (aTHX); 963 destroy_stacks (aTHX);
842 964
843 LOAD((&temp)); /* this will get rid of defsv etc.. */ 965 LOAD((&temp)); /* this will get rid of defsv etc.. */
966 SPAGAIN;
844 967
845 coro->mainstack = 0; 968 coro->mainstack = 0;
846 } 969 }
847 970
848 deallocate_stack (coro); 971 deallocate_stack (coro);
… …
903 1026
904# this is slightly dirty (should expose a c-level api) 1027# this is slightly dirty (should expose a c-level api)
905 1028
906BOOT: 1029BOOT:
907{ 1030{
1031 int i;
1032 HV *stash = gv_stashpv ("Coro", TRUE);
1033
1034 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1035 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1036 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1037 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1038 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1039 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1040
908 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1041 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
909 coro_ready = newAV ();
910 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1042 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1043
1044 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1045 coro_ready[i] = newAV ();
1046
1047 {
1048 SV *sv = perl_get_sv("Coro::API", 1);
1049
1050 coroapi.schedule = api_schedule;
1051 coroapi.cede = api_cede;
1052 coroapi.ready = api_ready;
1053 coroapi.nready = &coro_nready;
1054 coroapi.current = coro_current;
1055
1056 GCoroAPI = &coroapi;
1057 sv_setiv(sv, (IV)&coroapi);
1058 SvREADONLY_on(sv);
1059 }
911} 1060}
912 1061
913void 1062void
914ready(self) 1063ready(self)
915 SV * self 1064 SV * self
1065 PROTOTYPE: $
916 CODE: 1066 CODE:
917 av_push (coro_ready, SvREFCNT_inc (self)); 1067 api_ready (self);
1068
1069int
1070nready(...)
1071 PROTOTYPE:
1072 CODE:
1073 RETVAL = coro_nready;
1074 OUTPUT:
1075 RETVAL
918 1076
919void 1077void
920schedule(...) 1078schedule(...)
921 ALIAS: 1079 PROTOTYPE:
922 cede = 1
923 CODE: 1080 CODE:
924 SV *prev = GvSV (coro_current); 1081 api_schedule ();
925 SV *next = av_shift (coro_ready);
926 1082
927 if (next == &PL_sv_undef) 1083void
928 next = SvREFCNT_inc (GvSV (coro_idle)); 1084cede(...)
1085 PROTOTYPE:
1086 CODE:
1087 api_cede ();
929 1088
930 if (ix)
931 av_push (coro_ready, SvREFCNT_inc (prev));
932
933 GvSV (coro_current) = SvREFCNT_inc (next);
934 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
935 sv_to_coro (next, "Coro::schedule", "next coroutine"),
936 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937 SvREFCNT_dec (next);
938 SvREFCNT_dec (prev);
939

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