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/cvs/Coro/Coro/State.xs
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Comparing Coro/Coro/State.xs (file contents):
Revision 1.24 by root, Tue Aug 14 14:56:22 2001 UTC vs.
Revision 1.30 by root, Sat Aug 25 22:19:05 2001 UTC

… …
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 22
23#define SUB_INIT "Coro::State::initialize" 23#define SUB_INIT "Coro::State::initialize"
24#define UCORO_STATE "_coro_state" 24#define UCORO_STATE "_coro_state"
25 25
26/* 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
27 * to the current C stack pointer. Its property is that it changes with each call 27 * to the current C stack pointer. Its property is that it changes with each call
28 * and should be unique. */ 28 * and should be unique. */
29#define dSTACKLEVEL void *stacklevel = &stacklevel 29#define dSTACKLEVEL void *stacklevel = &stacklevel
30 30
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 31#define labs(l) ((l) >= 0 ? (l) : -(l))
… …
195 195
196 return newpadlist; 196 return newpadlist;
197} 197}
198 198
199#ifdef MAY_FLUSH 199#ifdef MAY_FLUSH
200STATIC AV * 200STATIC void
201free_padlist (AV *padlist) 201free_padlist (AV *padlist)
202{ 202{
203 /* may be during global destruction */ 203 /* may be during global destruction */
204 if (SvREFCNT(padlist)) 204 if (SvREFCNT(padlist))
205 { 205 {
… …
270#endif 270#endif
271 271
272#define SB do { 272#define SB do {
273#define SE } while (0) 273#define SE } while (0)
274 274
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277 277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279 279
280static void 280static void
281load_state(pTHX_ Coro__State c) 281load_state(pTHX_ Coro__State c)
… …
355 355
356 PUSHs (Nullsv); 356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 357 /* this loop was inspired by pp_caller */
358 for (;;) 358 for (;;)
359 { 359 {
360 do 360 while (cxix >= 0)
361 { 361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 362 PERL_CONTEXT *cx = &ccstk[cxix--];
363 363
364 if (CxTYPE(cx) == CXt_SUB) 364 if (CxTYPE(cx) == CXt_SUB)
365 { 365 {
… …
391 /* I never used formats, so how should I know how these are implemented? */ 391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */ 392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 } 394 }
395 } 395 }
396 while (cxix >= 0);
397 396
398 if (top_si->si_type == PERLSI_MAIN) 397 if (top_si->si_type == PERLSI_MAIN)
399 break; 398 break;
400 399
401 top_si = top_si->si_prev; 400 top_si = top_si->si_prev;
… …
407 } 406 }
408 407
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 408 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 409 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 410 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);
417 411
418 c->dowarn = PL_dowarn; 412 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval; 413 c->in_eval = PL_in_eval;
420 414
421 c->curstackinfo = PL_curstackinfo; 415 c->curstackinfo = PL_curstackinfo;
… …
661} 655}
662 656
663STATIC void 657STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 658transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{ 659{
666 dSP;
667 dSTACKLEVEL; 660 dSTACKLEVEL;
661 static struct coro *xnext;
668 662
669 if (prev != next) 663 if (prev != next)
670 { 664 {
665 xnext = next;
666
671 if (next->mainstack) 667 if (next->mainstack)
672 { 668 {
673 SAVE (prev, flags); 669 SAVE (prev, flags);
674 LOAD (next); 670 LOAD (next);
675 671
… …
698 continue_coro, (void *)next, 694 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize)); 695 next->stack->sptr, labs (next->stack->ssize));
700 } 696 }
701 697
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 698 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
699 /* don't add any code here */
703 } 700 }
704 701
705 } 702 }
706 else if (next->tmps_ix == -2) 703 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine"); 704 croak ("tried to transfer to running coroutine");
… …
728 allocate_stack (next, 1); 725 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx), 726 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next, 727 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize)); 728 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 729 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
730 /* don't add any code here */
733 } 731 }
734 } 732 }
735 else 733 else
736 setup_coro (next); 734 setup_coro (next);
737 } 735 }
738 } 736 }
739 737
738 /*
739 * xnext is now either prev or next, depending on wether
740 * we switched the c stack or not. that's why i use a global
741 * variable, that should become thread-specific at one point.
742 */
740 next->cursp = stacklevel; 743 xnext->cursp = stacklevel;
741} 744}
742 745
743static struct coro * 746static struct coro *
744sv_to_coro (SV *arg, const char *funcname, const char *varname) 747sv_to_coro (SV *arg, const char *funcname, const char *varname)
745{ 748{
… …
754 } 757 }
755 758
756 /* must also be changed inside Coro::Cont::yield */ 759 /* must also be changed inside Coro::Cont::yield */
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 760 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg)); 761 return (struct coro *) SvIV((SV*)SvRV(arg));
759 else 762
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 763 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
764 /*NORETURN*/
761} 765}
762 766
763static void 767static void
764api_transfer(pTHX_ SV *prev, SV *next, int flags) 768api_transfer(pTHX_ SV *prev, SV *next, int flags)
765{ 769{
770 transfer(aTHX_
766 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"), 771 sv_to_coro (prev, "Coro::transfer", "prev"),
767 sv_to_coro (next, "Coro::transfer", "next"), 772 sv_to_coro (next, "Coro::transfer", "next"),
768 flags); 773 flags);
769} 774}
770 775
771/** Coro ********************************************************************/ 776/** Coro ********************************************************************/
772 777
773#define PRIO_MAX 3 778#define PRIO_MAX 3
… …
778#define PRIO_MIN -4 783#define PRIO_MIN -4
779 784
780/* for Coro.pm */ 785/* for Coro.pm */
781static GV *coro_current, *coro_idle; 786static GV *coro_current, *coro_idle;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 787static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
788static int coro_nready;
783 789
784static void 790static void
785coro_enq (SV *sv) 791coro_enq (SV *sv)
786{ 792{
787 if (SvROK (sv)) 793 if (SvROK (sv))
… …
795 prio = prio > PRIO_MAX ? PRIO_MAX 801 prio = prio > PRIO_MAX ? PRIO_MAX
796 : prio < PRIO_MIN ? PRIO_MIN 802 : prio < PRIO_MIN ? PRIO_MIN
797 : prio; 803 : prio;
798 804
799 av_push (coro_ready [prio - PRIO_MIN], sv); 805 av_push (coro_ready [prio - PRIO_MIN], sv);
806 coro_nready++;
800 807
801 return; 808 return;
802 } 809 }
803 } 810 }
804 811
… …
814 if (min_prio < 0) 821 if (min_prio < 0)
815 min_prio = 0; 822 min_prio = 0;
816 823
817 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 824 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
818 if (av_len (coro_ready[prio]) >= 0) 825 if (av_len (coro_ready[prio]) >= 0)
826 {
827 coro_nready--;
819 return av_shift (coro_ready[prio]); 828 return av_shift (coro_ready[prio]);
829 }
820 830
821 return 0; 831 return 0;
822} 832}
823 833
824static void 834static void
… …
841 851
842 if (!next) 852 if (!next)
843 next = SvREFCNT_inc (GvSV (coro_idle)); 853 next = SvREFCNT_inc (GvSV (coro_idle));
844 854
845 GvSV (coro_current) = SvREFCNT_inc (next); 855 GvSV (coro_current) = SvREFCNT_inc (next);
856 transfer (aTHX_
846 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 857 sv_to_coro (prev, "Coro::schedule", "current coroutine"),
847 sv_to_coro (next, "Coro::schedule", "next coroutine"), 858 sv_to_coro (next, "Coro::schedule", "next coroutine"),
848 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 859 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
849 SvREFCNT_dec (next); 860 SvREFCNT_dec (next);
850 SvREFCNT_dec (prev); 861 SvREFCNT_dec (prev);
851} 862}
… …
868 if (!padlist_cache) 879 if (!padlist_cache)
869 padlist_cache = newHV (); 880 padlist_cache = newHV ();
870 881
871 main_mainstack = PL_mainstack; 882 main_mainstack = PL_mainstack;
872 883
873 {
874 SV *sv = perl_get_sv("Coro::API", 1);
875
876 coroapi.ver = CORO_API_VERSION - 1; 884 coroapi.ver = CORO_API_VERSION;
877 coroapi.transfer = api_transfer; 885 coroapi.transfer = api_transfer;
878 coroapi.schedule = api_schedule;
879 coroapi.ready = api_ready;
880
881 GCoroAPI = &coroapi;
882 sv_setiv(sv, (IV)&coroapi);
883 SvREADONLY_on(sv);
884 }
885} 886}
886 887
887Coro::State 888Coro::State
888_newprocess(args) 889_newprocess(args)
889 SV * args 890 SV * args
… …
922 923
923 if (coro->mainstack && coro->mainstack != main_mainstack) 924 if (coro->mainstack && coro->mainstack != main_mainstack)
924 { 925 {
925 struct coro temp; 926 struct coro temp;
926 927
928 PUTBACK;
927 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 929 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
928 LOAD(aTHX_ coro); 930 LOAD(aTHX_ coro);
931 SPAGAIN;
929 932
930 destroy_stacks (aTHX); 933 destroy_stacks (aTHX);
931 934
932 LOAD((&temp)); /* this will get rid of defsv etc.. */ 935 LOAD((&temp)); /* this will get rid of defsv etc.. */
936 SPAGAIN;
933 937
934 coro->mainstack = 0; 938 coro->mainstack = 0;
935 } 939 }
936 940
937 deallocate_stack (coro); 941 deallocate_stack (coro);
… …
1007 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1011 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1008 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1012 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1009 1013
1010 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1014 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1011 coro_ready[i] = newAV (); 1015 coro_ready[i] = newAV ();
1016
1017 {
1018 SV *sv = perl_get_sv("Coro::API", 1);
1019
1020 coroapi.schedule = api_schedule;
1021 coroapi.ready = api_ready;
1022 coroapi.nready = &coro_nready;
1023 coroapi.current = coro_current;
1024
1025 GCoroAPI = &coroapi;
1026 sv_setiv(sv, (IV)&coroapi);
1027 SvREADONLY_on(sv);
1028 }
1012} 1029}
1013 1030
1014void 1031void
1015ready(self) 1032ready(self)
1016 SV * self 1033 SV * self
1017 CODE: 1034 CODE:
1018 api_ready (self); 1035 api_ready (self);
1019 1036
1037int
1038nready(...)
1039 PROTOTYPE:
1040 CODE:
1041 RETVAL = coro_nready;
1042 OUTPUT:
1043 RETVAL
1044
1020void 1045void
1021schedule(...) 1046schedule(...)
1047 PROTOTYPE:
1022 ALIAS: 1048 ALIAS:
1023 cede = 1 1049 cede = 1
1024 CODE: 1050 CODE:
1025 api_schedule (ix); 1051 api_schedule (ix);
1026 1052

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