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Comparing Coro/Coro/State.xs (file contents):
Revision 1.20 by root, Fri Aug 3 12:51:56 2001 UTC vs.
Revision 1.34 by root, Fri Sep 14 15:40:56 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
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 */
… …
206 197
207 return newpadlist; 198 return newpadlist;
208} 199}
209 200
210#ifdef MAY_FLUSH 201#ifdef MAY_FLUSH
211STATIC AV * 202STATIC void
212free_padlist (AV *padlist) 203free_padlist (AV *padlist)
213{ 204{
214 /* may be during global destruction */ 205 /* may be during global destruction */
215 if (SvREFCNT(padlist)) 206 if (SvREFCNT(padlist))
216 { 207 {
… …
281#endif 272#endif
282 273
283#define SB do { 274#define SB do {
284#define SE } while (0) 275#define SE } while (0)
285 276
286#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 277#define LOAD(state) load_state(aTHX_ (state));
287#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 278#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
288 279
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 280#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
290 281
291static void 282static void
292load_state(pTHX_ Coro__State c) 283load_state(pTHX_ Coro__State c)
… …
366 357
367 PUSHs (Nullsv); 358 PUSHs (Nullsv);
368 /* this loop was inspired by pp_caller */ 359 /* this loop was inspired by pp_caller */
369 for (;;) 360 for (;;)
370 { 361 {
371 do 362 while (cxix >= 0)
372 { 363 {
373 PERL_CONTEXT *cx = &ccstk[cxix--]; 364 PERL_CONTEXT *cx = &ccstk[cxix--];
374 365
375 if (CxTYPE(cx) == CXt_SUB) 366 if (CxTYPE(cx) == CXt_SUB)
376 { 367 {
… …
402 /* I never used formats, so how should I know how these are implemented? */ 393 /* I never used formats, so how should I know how these are implemented? */
403 /* my bold guess is as a simple, plain sub... */ 394 /* my bold guess is as a simple, plain sub... */
404 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 395 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405 } 396 }
406 } 397 }
407 while (cxix >= 0);
408 398
409 if (top_si->si_type == PERLSI_MAIN) 399 if (top_si->si_type == PERLSI_MAIN)
410 break; 400 break;
411 401
412 top_si = top_si->si_prev; 402 top_si = top_si->si_prev;
… …
418 } 408 }
419 409
420 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 410 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
421 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 411 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
422 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 412 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);
428 413
429 c->dowarn = PL_dowarn; 414 c->dowarn = PL_dowarn;
430 c->in_eval = PL_in_eval; 415 c->in_eval = PL_in_eval;
431 416
432 c->curstackinfo = PL_curstackinfo; 417 c->curstackinfo = PL_curstackinfo;
… …
504 * still there is a memleak of 128 bytes... 489 * still there is a memleak of 128 bytes...
505 */ 490 */
506STATIC void 491STATIC void
507destroy_stacks(pTHX) 492destroy_stacks(pTHX)
508{ 493{
494 if (!IN_DESTRUCT)
495 {
509 /* is this ugly, I ask? */ 496 /* is this ugly, I ask? */
510 while (PL_scopestack_ix) 497 while (PL_scopestack_ix)
511 LEAVE; 498 LEAVE;
512 499
513 /* sure it is, but more important: is it correct?? :/ */ 500 /* sure it is, but more important: is it correct?? :/ */
514 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ 501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515 FREETMPS; 502 FREETMPS;
503 }
516 504
517 while (PL_curstackinfo->si_next) 505 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 506 PL_curstackinfo = PL_curstackinfo->si_next;
519 507
520 while (PL_curstackinfo) 508 while (PL_curstackinfo)
… …
525 dSP; 513 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */ 515 PUTBACK; /* possibly superfluous */
528 } 516 }
529 517
518 if (!IN_DESTRUCT)
519 {
530 dounwind(-1); 520 dounwind(-1);
531
532 SvREFCNT_dec(PL_curstackinfo->si_stack); 521 SvREFCNT_dec(PL_curstackinfo->si_stack);
522 }
523
533 Safefree(PL_curstackinfo->si_cxstack); 524 Safefree(PL_curstackinfo->si_cxstack);
534 Safefree(PL_curstackinfo); 525 Safefree(PL_curstackinfo);
535 PL_curstackinfo = p; 526 PL_curstackinfo = p;
536 } 527 }
537 528
… …
659{ 650{
660 /* 651 /*
661 * this is a _very_ stripped down perl interpreter ;) 652 * this is a _very_ stripped down perl interpreter ;)
662 */ 653 */
663 Coro__State ctx = (Coro__State)arg; 654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
664 656
665 /*FIXME*//* must set up top_env here */ 657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env;
662
666 ctx->cursp = 0; 663 ctx->cursp = 0;
667 PL_op = PL_op->op_next; 664 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX); 665 CALLRUNOPS(aTHX);
669 666
670 abort (); 667 abort ();
671} 668}
672 669
673STATIC void 670STATIC void
674transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 671transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
675{ 672{
676 dSP;
677 dSTACKLEVEL; 673 dSTACKLEVEL;
674 static struct coro *xnext;
678 675
679 if (prev != next) 676 if (prev != next)
680 { 677 {
678 xnext = next;
679
681 if (next->mainstack) 680 if (next->mainstack)
682 { 681 {
683 SAVE (prev, flags); 682 SAVE (prev, flags);
684 LOAD (next); 683 LOAD (next);
685 684
… …
708 continue_coro, (void *)next, 707 continue_coro, (void *)next,
709 next->stack->sptr, labs (next->stack->ssize)); 708 next->stack->sptr, labs (next->stack->ssize));
710 } 709 }
711 710
712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 } 713 }
714 714
715 } 715 }
716 else if (next->tmps_ix == -2) 716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine"); 717 croak ("tried to transfer to running coroutine");
… …
738 allocate_stack (next, 1); 738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx), 739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next, 740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize)); 741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
743 } 744 }
744 } 745 }
745 else 746 else
746 setup_coro (next); 747 setup_coro (next);
747 } 748 }
748 }
749 749
750 /*
751 * xnext is now either prev or next, depending on wether
752 * we switched the c stack or not. that's why i use a global
753 * variable, that should become thread-specific at one point.
754 */
750 next->cursp = stacklevel; 755 xnext->cursp = stacklevel;
756 }
757}
758
759static struct coro *
760sv_to_coro (SV *arg, const char *funcname, const char *varname)
761{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
763 {
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765
766 if (!he)
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769 arg = HeVAL(he);
770 }
771
772 /* must also be changed inside Coro::Cont::yield */
773 if (SvROK(arg) && SvOBJECT(SvRV(arg))
774 && SvSTASH(SvRV(arg)) == coro_state_stash)
775 return (struct coro *) SvIV((SV*)SvRV(arg));
776
777 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
778 /*NORETURN*/
779}
780
781static void
782api_transfer(pTHX_ SV *prev, SV *next, int flags)
783{
784 transfer(aTHX_
785 sv_to_coro (prev, "Coro::transfer", "prev"),
786 sv_to_coro (next, "Coro::transfer", "next"),
787 flags);
788}
789
790/** Coro ********************************************************************/
791
792#define PRIO_MAX 3
793#define PRIO_HIGH 1
794#define PRIO_NORMAL 0
795#define PRIO_LOW -1
796#define PRIO_IDLE -3
797#define PRIO_MIN -4
798
799/* for Coro.pm */
800static GV *coro_current, *coro_idle;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
802static int coro_nready;
803
804static void
805coro_enq (SV *sv)
806{
807 if (SvROK (sv))
808 {
809 SV *hv = SvRV (sv);
810 if (SvTYPE (hv) == SVt_PVHV)
811 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815 prio = prio > PRIO_MAX ? PRIO_MAX
816 : prio < PRIO_MIN ? PRIO_MIN
817 : prio;
818
819 av_push (coro_ready [prio - PRIO_MIN], sv);
820 coro_nready++;
821
822 return;
823 }
824 }
825
826 croak ("Coro::ready tried to enqueue something that is not a coroutine");
827}
828
829static SV *
830coro_deq (int min_prio)
831{
832 int prio = PRIO_MAX - PRIO_MIN;
833
834 min_prio -= PRIO_MIN;
835 if (min_prio < 0)
836 min_prio = 0;
837
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839 if (av_len (coro_ready[prio]) >= 0)
840 {
841 coro_nready--;
842 return av_shift (coro_ready[prio]);
843 }
844
845 return 0;
846}
847
848static void
849api_ready (SV *coro)
850{
851 coro_enq (SvREFCNT_inc (coro));
852}
853
854static void
855api_schedule (int cede)
856{
857 SV *prev, *next;
858
859 prev = GvSV (coro_current);
860
861 if (cede)
862 coro_enq (SvREFCNT_inc (prev));
863
864 next = coro_deq (PRIO_MIN);
865
866 if (!next)
867 next = SvREFCNT_inc (GvSV (coro_idle));
868
869 GvSV (coro_current) = SvREFCNT_inc (next);
870 transfer (aTHX_
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"),
872 sv_to_coro (next, "Coro::schedule", "next coroutine"),
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
874 SvREFCNT_dec (next);
875 SvREFCNT_dec (prev);
751} 876}
752 877
753MODULE = Coro::State PACKAGE = Coro::State 878MODULE = Coro::State PACKAGE = Coro::State
754 879
755PROTOTYPES: ENABLE 880PROTOTYPES: ENABLE
… …
767 892
768 if (!padlist_cache) 893 if (!padlist_cache)
769 padlist_cache = newHV (); 894 padlist_cache = newHV ();
770 895
771 main_mainstack = PL_mainstack; 896 main_mainstack = PL_mainstack;
897
898 coroapi.ver = CORO_API_VERSION;
899 coroapi.transfer = api_transfer;
772} 900}
773 901
774Coro::State 902Coro::State
775_newprocess(args) 903_newprocess(args)
776 SV * args 904 SV * args
… …
790 RETVAL = coro; 918 RETVAL = coro;
791 OUTPUT: 919 OUTPUT:
792 RETVAL 920 RETVAL
793 921
794void 922void
795transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 923transfer(prev, next, flags)
796 Coro::State_or_hashref prev 924 Coro::State_or_hashref prev
797 Coro::State_or_hashref next 925 Coro::State_or_hashref next
798 int flags 926 int flags
799 PROTOTYPE: @ 927 PROTOTYPE: @
800 CODE: 928 CODE:
… …
809 937
810 if (coro->mainstack && coro->mainstack != main_mainstack) 938 if (coro->mainstack && coro->mainstack != main_mainstack)
811 { 939 {
812 struct coro temp; 940 struct coro temp;
813 941
942 PUTBACK;
814 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
815 LOAD(aTHX_ coro); 944 LOAD(aTHX_ coro);
945 SPAGAIN;
816 946
817 destroy_stacks (aTHX); 947 destroy_stacks (aTHX);
818 948
819 LOAD((&temp)); /* this will get rid of defsv etc.. */ 949 LOAD((&temp)); /* this will get rid of defsv etc.. */
950 SPAGAIN;
820 951
821 coro->mainstack = 0; 952 coro->mainstack = 0;
822 } 953 }
823 954
824 deallocate_stack (coro); 955 deallocate_stack (coro);
… …
845 exit (code); 976 exit (code);
846#endif 977#endif
847 978
848MODULE = Coro::State PACKAGE = Coro::Cont 979MODULE = Coro::State PACKAGE = Coro::Cont
849 980
850# this is slightly dirty 981# this is slightly dirty (should expose a c-level api)
851 982
852void 983void
853yield(...) 984yield(...)
854 PROTOTYPE: @ 985 PROTOTYPE: @
855 CODE: 986 CODE:
… …
873 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 1004 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
874 SvREFCNT_dec (sv); 1005 SvREFCNT_dec (sv);
875 1006
876 transfer(aTHX_ prev, next, 0); 1007 transfer(aTHX_ prev, next, 0);
877 1008
1009MODULE = Coro::State PACKAGE = Coro
1010
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT:
1014{
1015 int i;
1016 HV *stash = gv_stashpv ("Coro", TRUE);
1017
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV ();
1030
1031 {
1032 SV *sv = perl_get_sv("Coro::API", 1);
1033
1034 coroapi.schedule = api_schedule;
1035 coroapi.ready = api_ready;
1036 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current;
1038
1039 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi);
1041 SvREADONLY_on(sv);
1042 }
1043}
1044
1045void
1046ready(self)
1047 SV * self
1048 CODE:
1049 api_ready (self);
1050
1051int
1052nready(...)
1053 PROTOTYPE:
1054 CODE:
1055 RETVAL = coro_nready;
1056 OUTPUT:
1057 RETVAL
1058
1059void
1060schedule(...)
1061 PROTOTYPE:
1062 ALIAS:
1063 cede = 1
1064 CODE:
1065 api_schedule (ix);
1066

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