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Comparing Coro/Coro/State.xs (file contents):
Revision 1.29 by root, Sat Aug 25 21:40:34 2001 UTC vs.
Revision 1.46 by pcg, Wed Nov 5 20:02:46 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
… …
25 48
26/* The next macro should declare a variable stacklevel that contains and approximation 49/* 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 50 * to the current C stack pointer. Its property is that it changes with each call
28 * and should be unique. */ 51 * and should be unique. */
29#define dSTACKLEVEL void *stacklevel = &stacklevel 52#define dSTACKLEVEL void *stacklevel = &stacklevel
53
54#define IN_DESTRUCT (PL_main_cv == Nullcv)
30 55
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 56#define labs(l) ((l) >= 0 ? (l) : -(l))
32 57
33#include "CoroAPI.h" 58#include "CoroAPI.h"
34 59
… …
45 void *sptr; 70 void *sptr;
46 long ssize; /* positive == mmap, otherwise malloc */ 71 long ssize; /* positive == mmap, otherwise malloc */
47} coro_stack; 72} coro_stack;
48 73
49struct coro { 74struct coro {
75 /* the top-level JMPENV for each coroutine, needed to catch dies. */
76 JMPENV start_env;
77
50 /* the optional C context */ 78 /* the optional C context */
51 coro_stack *stack; 79 coro_stack *stack;
52 void *cursp; 80 void *cursp;
53 int gencnt; 81 int gencnt;
54 82
… …
66 AV *curstack; 94 AV *curstack;
67 AV *mainstack; 95 AV *mainstack;
68 SV **stack_sp; 96 SV **stack_sp;
69 OP *op; 97 OP *op;
70 SV **curpad; 98 SV **curpad;
99 AV *comppad;
71 SV **stack_base; 100 SV **stack_base;
72 SV **stack_max; 101 SV **stack_max;
73 SV **tmps_stack; 102 SV **tmps_stack;
74 I32 tmps_floor; 103 I32 tmps_floor;
75 I32 tmps_ix; 104 I32 tmps_ix;
… …
99static AV *main_mainstack; /* used to differentiate between $main and others */ 128static AV *main_mainstack; /* used to differentiate between $main and others */
100static HV *coro_state_stash; 129static HV *coro_state_stash;
101static SV *ucoro_state_sv; 130static SV *ucoro_state_sv;
102static U32 ucoro_state_hash; 131static U32 ucoro_state_hash;
103static HV *padlist_cache; 132static HV *padlist_cache;
133static SV *coro_mortal; /* will be freed after next transfer */
104 134
105/* mostly copied from op.c:cv_clone2 */ 135/* mostly copied from op.c:cv_clone2 */
106STATIC AV * 136STATIC AV *
107clone_padlist (AV *protopadlist) 137clone_padlist (AV *protopadlist)
108{ 138{
… …
287 PL_curstack = c->curstack; 317 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack; 318 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp; 319 PL_stack_sp = c->stack_sp;
290 PL_op = c->op; 320 PL_op = c->op;
291 PL_curpad = c->curpad; 321 PL_curpad = c->curpad;
322 PL_comppad = c->comppad;
292 PL_stack_base = c->stack_base; 323 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max; 324 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack; 325 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor; 326 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix; 327 PL_tmps_ix = c->tmps_ix;
… …
355 386
356 PUSHs (Nullsv); 387 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 388 /* this loop was inspired by pp_caller */
358 for (;;) 389 for (;;)
359 { 390 {
360 do 391 while (cxix >= 0)
361 { 392 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 393 PERL_CONTEXT *cx = &ccstk[cxix--];
363 394
364 if (CxTYPE(cx) == CXt_SUB) 395 if (CxTYPE(cx) == CXt_SUB)
365 { 396 {
… …
384 PUSHs ((SV *)cv); 415 PUSHs ((SV *)cv);
385 416
386 get_padlist (cv); /* this is a monster */ 417 get_padlist (cv); /* this is a monster */
387 } 418 }
388 } 419 }
420#ifdef CXt_FORMAT
389 else if (CxTYPE(cx) == CXt_FORMAT) 421 else if (CxTYPE(cx) == CXt_FORMAT)
390 { 422 {
391 /* I never used formats, so how should I know how these are implemented? */ 423 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */ 424 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 425 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 } 426 }
427#endif
395 } 428 }
396 while (cxix >= 0);
397 429
398 if (top_si->si_type == PERLSI_MAIN) 430 if (top_si->si_type == PERLSI_MAIN)
399 break; 431 break;
400 432
401 top_si = top_si->si_prev; 433 top_si = top_si->si_prev;
… …
417 c->curstack = PL_curstack; 449 c->curstack = PL_curstack;
418 c->mainstack = PL_mainstack; 450 c->mainstack = PL_mainstack;
419 c->stack_sp = PL_stack_sp; 451 c->stack_sp = PL_stack_sp;
420 c->op = PL_op; 452 c->op = PL_op;
421 c->curpad = PL_curpad; 453 c->curpad = PL_curpad;
454 c->comppad = PL_comppad;
422 c->stack_base = PL_stack_base; 455 c->stack_base = PL_stack_base;
423 c->stack_max = PL_stack_max; 456 c->stack_max = PL_stack_max;
424 c->tmps_stack = PL_tmps_stack; 457 c->tmps_stack = PL_tmps_stack;
425 c->tmps_floor = PL_tmps_floor; 458 c->tmps_floor = PL_tmps_floor;
426 c->tmps_ix = PL_tmps_ix; 459 c->tmps_ix = PL_tmps_ix;
… …
466 499
467 New(54,PL_markstack,16,I32); 500 New(54,PL_markstack,16,I32);
468 PL_markstack_ptr = PL_markstack; 501 PL_markstack_ptr = PL_markstack;
469 PL_markstack_max = PL_markstack + 16; 502 PL_markstack_max = PL_markstack + 16;
470 503
504#ifdef SET_MARK_OFFSET
471 SET_MARK_OFFSET; 505 SET_MARK_OFFSET;
506#endif
472 507
473 New(54,PL_scopestack,16,I32); 508 New(54,PL_scopestack,16,I32);
474 PL_scopestack_ix = 0; 509 PL_scopestack_ix = 0;
475 PL_scopestack_max = 16; 510 PL_scopestack_max = 16;
476 511
… …
488 * still there is a memleak of 128 bytes... 523 * still there is a memleak of 128 bytes...
489 */ 524 */
490STATIC void 525STATIC void
491destroy_stacks(pTHX) 526destroy_stacks(pTHX)
492{ 527{
528 if (!IN_DESTRUCT)
529 {
493 /* is this ugly, I ask? */ 530 /* is this ugly, I ask? */
494 while (PL_scopestack_ix) 531 while (PL_scopestack_ix)
495 LEAVE; 532 LEAVE;
496 533
497 /* sure it is, but more important: is it correct?? :/ */ 534 /* sure it is, but more important: is it correct?? :/ */
498 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ 535 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
499 FREETMPS; 536 FREETMPS;
537 }
500 538
501 while (PL_curstackinfo->si_next) 539 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 540 PL_curstackinfo = PL_curstackinfo->si_next;
503 541
504 while (PL_curstackinfo) 542 while (PL_curstackinfo)
… …
509 dSP; 547 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 548 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */ 549 PUTBACK; /* possibly superfluous */
512 } 550 }
513 551
514 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */ 552 if (!IN_DESTRUCT)
553 {
515 dounwind(-1); 554 dounwind(-1);
516
517 SvREFCNT_dec(PL_curstackinfo->si_stack); 555 SvREFCNT_dec(PL_curstackinfo->si_stack);
556 }
557
518 Safefree(PL_curstackinfo->si_cxstack); 558 Safefree(PL_curstackinfo->si_cxstack);
519 Safefree(PL_curstackinfo); 559 Safefree(PL_curstackinfo);
520 PL_curstackinfo = p; 560 PL_curstackinfo = p;
521 } 561 }
522 562
… …
537 stack->refcnt = 1; 577 stack->refcnt = 1;
538 stack->usecnt = 1; 578 stack->usecnt = 1;
539 stack->gencnt = ctx->gencnt = 0; 579 stack->gencnt = ctx->gencnt = 0;
540 if (alloc) 580 if (alloc)
541 { 581 {
542#ifdef HAVE_MMAP 582#if HAVE_MMAP
543 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */ 583 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
544 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); 584 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
545 if (stack->sptr == (void *)-1) 585 if (stack->sptr == (void *)-1)
546#endif 586#endif
547 { 587 {
548 /*FIXME*//*D*//* reasonable stack size! */ 588 /*FIXME*//*D*//* reasonable stack size! */
549 stack->ssize = -4096 * sizeof (long); 589 stack->ssize = -4096 * sizeof (long);
… …
630 * that doesn't matter, though, since it is only 670 * that doesn't matter, though, since it is only
631 * pp_nextstate and we never return... 671 * pp_nextstate and we never return...
632 * ah yes, and I don't care anyways ;) 672 * ah yes, and I don't care anyways ;)
633 */ 673 */
634 PUTBACK; 674 PUTBACK;
635 PL_op = pp_entersub(); 675 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
636 SPAGAIN; 676 SPAGAIN;
637 677
638 ENTER; /* necessary e.g. for dounwind */ 678 ENTER; /* necessary e.g. for dounwind */
639 } 679 }
640} 680}
… …
644{ 684{
645 /* 685 /*
646 * this is a _very_ stripped down perl interpreter ;) 686 * this is a _very_ stripped down perl interpreter ;)
647 */ 687 */
648 Coro__State ctx = (Coro__State)arg; 688 Coro__State ctx = (Coro__State)arg;
689 JMPENV coro_start_env;
649 690
650 /*FIXME*//* must set up top_env here */ 691 PL_top_env = &ctx->start_env;
692
651 ctx->cursp = 0; 693 ctx->cursp = 0;
652 PL_op = PL_op->op_next; 694 PL_op = PL_op->op_next;
653 CALLRUNOPS(aTHX); 695 CALLRUNOPS(aTHX);
654 696
655 abort (); 697 abort ();
… …
712 if (!prev->stack) 754 if (!prev->stack)
713 allocate_stack (prev, 0); 755 allocate_stack (prev, 0);
714 756
715 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 757 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716 { 758 {
759 PL_top_env = &next->start_env;
760
717 setup_coro (next); 761 setup_coro (next);
718 762
719 prev->stack->refcnt++; 763 prev->stack->refcnt++;
720 prev->stack->usecnt++; 764 prev->stack->usecnt++;
721 next->stack = prev->stack; 765 next->stack = prev->stack;
… …
732 } 776 }
733 } 777 }
734 else 778 else
735 setup_coro (next); 779 setup_coro (next);
736 } 780 }
781
782 /*
783 * xnext is now either prev or next, depending on wether
784 * we switched the c stack or not. that's why I use a global
785 * variable, that should become thread-specific at one point.
786 */
787 xnext->cursp = stacklevel;
737 } 788 }
738 789
739 /* 790 if (coro_mortal)
740 * xnext is now either prev or next, depending on wether
741 * we switched the c stack or not. that's why i use a global
742 * variable, that should become thread-specific at one point.
743 */
744 xnext->cursp = stacklevel;
745}
746
747static struct coro *
748sv_to_coro (SV *arg, const char *funcname, const char *varname)
749{
750 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
751 { 791 {
752 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 792 SvREFCNT_dec (coro_mortal);
753 793 coro_mortal = 0;
754 if (!he)
755 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
756
757 arg = HeVAL(he);
758 } 794 }
759 795}
796
797#define SV_CORO(sv,func) \
798 do { \
799 if (SvROK (sv)) \
800 sv = SvRV (sv); \
801 \
802 if (SvTYPE(sv) == SVt_PVHV) \
803 { \
804 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
805 \
806 if (!he) \
807 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808 \
809 (sv) = SvRV (HeVAL(he)); \
810 } \
811 \
760 /* must also be changed inside Coro::Cont::yield */ 812 /* must also be changed inside Coro::Cont::yield */ \
761 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 813 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
762 return (struct coro *) SvIV((SV*)SvRV(arg));
763
764 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 814 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
765 /*NORETURN*/ 815 \
766} 816 } while(0)
817
818#define SvSTATE(sv) (struct coro *)SvIV (sv)
767 819
768static void 820static void
769api_transfer(pTHX_ SV *prev, SV *next, int flags) 821api_transfer(pTHX_ SV *prev, SV *next, int flags)
770{ 822{
771 transfer(aTHX_ 823 SV_CORO (prev, "Coro::transfer");
772 sv_to_coro (prev, "Coro::transfer", "prev"), 824 SV_CORO (next, "Coro::transfer");
773 sv_to_coro (next, "Coro::transfer", "next"), 825
774 flags); 826 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
775} 827}
776 828
777/** Coro ********************************************************************/ 829/** Coro ********************************************************************/
778 830
779#define PRIO_MAX 3 831#define PRIO_MAX 3
… …
789static int coro_nready; 841static int coro_nready;
790 842
791static void 843static void
792coro_enq (SV *sv) 844coro_enq (SV *sv)
793{ 845{
794 if (SvROK (sv))
795 {
796 SV *hv = SvRV (sv);
797 if (SvTYPE (hv) == SVt_PVHV) 846 if (SvTYPE (sv) == SVt_PVHV)
798 { 847 {
799 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 848 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
800 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 849 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
801 850
802 prio = prio > PRIO_MAX ? PRIO_MAX 851 prio = prio > PRIO_MAX ? PRIO_MAX
803 : prio < PRIO_MIN ? PRIO_MIN 852 : prio < PRIO_MIN ? PRIO_MIN
804 : prio; 853 : prio;
805 854
806 av_push (coro_ready [prio - PRIO_MIN], sv); 855 av_push (coro_ready [prio - PRIO_MIN], sv);
807 coro_nready++; 856 coro_nready++;
808 857
809 return; 858 return;
810 }
811 } 859 }
812 860
813 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 861 croak ("Coro::ready tried to enqueue something that is not a coroutine");
814} 862}
815 863
… …
833} 881}
834 882
835static void 883static void
836api_ready (SV *coro) 884api_ready (SV *coro)
837{ 885{
886 if (SvROK (coro))
887 coro = SvRV (coro);
888
838 coro_enq (SvREFCNT_inc (coro)); 889 coro_enq (SvREFCNT_inc (coro));
839} 890}
840 891
841static void 892static void
842api_schedule (int cede) 893api_schedule (void)
843{ 894{
844 SV *prev, *next; 895 SV *prev, *next;
845 896
846 prev = GvSV (coro_current); 897 prev = SvRV (GvSV (coro_current));
847
848 if (cede)
849 coro_enq (SvREFCNT_inc (prev));
850
851 next = coro_deq (PRIO_MIN); 898 next = coro_deq (PRIO_MIN);
852 899
853 if (!next) 900 if (!next)
854 next = SvREFCNT_inc (GvSV (coro_idle)); 901 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
855 902
856 GvSV (coro_current) = SvREFCNT_inc (next); 903 /* free this only after the transfer */
857 transfer (aTHX_ 904 coro_mortal = prev;
858 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 905 SV_CORO (prev, "Coro::schedule");
859 sv_to_coro (next, "Coro::schedule", "next coroutine"), 906
907 SvRV (GvSV (coro_current)) = next;
908
909 SV_CORO (next, "Coro::schedule");
910
911 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
860 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 912 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
861 SvREFCNT_dec (next); 913}
862 SvREFCNT_dec (prev); 914
915static void
916api_cede (void)
917{
918 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
919
920 api_schedule ();
863} 921}
864 922
865MODULE = Coro::State PACKAGE = Coro::State 923MODULE = Coro::State PACKAGE = Coro::State
866 924
867PROTOTYPES: ENABLE 925PROTOTYPES: ENABLE
… …
900 958
901 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 959 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
902 coro->mainstack = 0; /* actual work is done inside transfer */ 960 coro->mainstack = 0; /* actual work is done inside transfer */
903 coro->stack = 0; 961 coro->stack = 0;
904 962
963 /* same as JMPENV_BOOTSTRAP */
964 /* we might be able to recycle start_env, but safe is safe */
965 Zero(&coro->start_env, 1, JMPENV);
966 coro->start_env.je_ret = -1;
967 coro->start_env.je_mustcatch = TRUE;
968
905 RETVAL = coro; 969 RETVAL = coro;
906 OUTPUT: 970 OUTPUT:
907 RETVAL 971 RETVAL
908 972
909void 973void
910transfer(prev, next, flags) 974transfer(prev, next, flags)
911 Coro::State_or_hashref prev 975 SV *prev
912 Coro::State_or_hashref next 976 SV *next
913 int flags 977 int flags
914 PROTOTYPE: @ 978 PROTOTYPE: @
915 CODE: 979 CODE:
916 PUTBACK; 980 PUTBACK;
981 SV_CORO (next, "Coro::transfer");
982 SV_CORO (prev, "Coro::transfer");
917 transfer (aTHX_ prev, next, flags); 983 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
918 SPAGAIN; 984 SPAGAIN;
919 985
920void 986void
921DESTROY(coro) 987DESTROY(coro)
922 Coro::State coro 988 Coro::State coro
… …
975 SV *sv; 1041 SV *sv;
976 AV *defav = GvAV (PL_defgv); 1042 AV *defav = GvAV (PL_defgv);
977 struct coro *prev, *next; 1043 struct coro *prev, *next;
978 1044
979 if (!returnstk) 1045 if (!returnstk)
980 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1046 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
981 1047
982 /* set up @_ -- ugly */ 1048 /* set up @_ -- ugly */
983 av_clear (defav); 1049 av_clear (defav);
984 av_fill (defav, items - 1); 1050 av_fill (defav, items - 1);
985 while (items--) 1051 while (items--)
… …
1017 1083
1018 { 1084 {
1019 SV *sv = perl_get_sv("Coro::API", 1); 1085 SV *sv = perl_get_sv("Coro::API", 1);
1020 1086
1021 coroapi.schedule = api_schedule; 1087 coroapi.schedule = api_schedule;
1088 coroapi.cede = api_cede;
1022 coroapi.ready = api_ready; 1089 coroapi.ready = api_ready;
1023 coroapi.nready = &coro_nready; 1090 coroapi.nready = &coro_nready;
1024 coroapi.current = coro_current; 1091 coroapi.current = coro_current;
1025 1092
1026 GCoroAPI = &coroapi; 1093 GCoroAPI = &coroapi;
… …
1030} 1097}
1031 1098
1032void 1099void
1033ready(self) 1100ready(self)
1034 SV * self 1101 SV * self
1102 PROTOTYPE: $
1035 CODE: 1103 CODE:
1036 api_ready (self); 1104 api_ready (self);
1037 1105
1038int 1106int
1039nready(...) 1107nready(...)
… …
1044 RETVAL 1112 RETVAL
1045 1113
1046void 1114void
1047schedule(...) 1115schedule(...)
1048 PROTOTYPE: 1116 PROTOTYPE:
1049 ALIAS:
1050 cede = 1
1051 CODE: 1117 CODE:
1052 api_schedule (ix); 1118 api_schedule ();
1053 1119
1120void
1121cede(...)
1122 PROTOTYPE:
1123 CODE:
1124 api_cede ();
1125

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