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 "libcoro/coro.c" |
5 | #include "libcoro/coro.c" |
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6 | |
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7 | #include <signal.h> |
6 | |
8 | |
7 | #ifdef HAVE_MMAP |
9 | #ifdef HAVE_MMAP |
8 | # include <unistd.h> |
10 | # include <unistd.h> |
9 | # include <sys/mman.h> |
11 | # include <sys/mman.h> |
10 | # ifndef MAP_ANON |
12 | # ifndef MAP_ANON |
… | |
… | |
14 | # undef HAVE_MMAP |
16 | # undef HAVE_MMAP |
15 | # endif |
17 | # endif |
16 | # endif |
18 | # endif |
17 | #endif |
19 | #endif |
18 | |
20 | |
19 | #define MAY_FLUSH /* increases codesize */ |
21 | #define MAY_FLUSH /* increases codesize and is rarely used */ |
20 | |
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21 | /* perl-related */ |
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22 | #define TRANSFER_SAVE_DEFAV 0x00000001 |
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23 | #define TRANSFER_SAVE_DEFSV 0x00000002 |
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24 | #define TRANSFER_SAVE_ERRSV 0x00000004 |
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25 | /* c-related */ |
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26 | #define TRANSFER_SAVE_CCTXT 0x00000008 |
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|
27 | #ifdef CORO_LAZY_STACK |
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|
28 | # define TRANSFER_LAZY_STACK 0x00000010 |
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29 | #else |
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30 | # define TRANSFER_LAZY_STACK 0x00000000 |
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31 | #endif |
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32 | |
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33 | #define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ |
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34 | |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) |
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35 | |
22 | |
36 | #define SUB_INIT "Coro::State::initialize" |
23 | #define SUB_INIT "Coro::State::initialize" |
37 | #define UCORO_STATE "_coro_state" |
24 | #define UCORO_STATE "_coro_state" |
38 | |
25 | |
39 | /* 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 |
40 | * 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 |
41 | * and should be unique. */ |
28 | * and should be unique. */ |
42 | #define dSTACKLEVEL void *stacklevel = &stacklevel |
29 | #define dSTACKLEVEL void *stacklevel = &stacklevel |
43 | |
30 | |
44 | #define labs(l) ((l) >= 0 ? (l) : -(l)) |
31 | #define labs(l) ((l) >= 0 ? (l) : -(l)) |
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32 | |
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33 | #include "CoroAPI.h" |
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34 | |
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35 | static struct CoroAPI coroapi; |
45 | |
36 | |
46 | /* this is actually not only the c stack but also c registers etc... */ |
37 | /* this is actually not only the c stack but also c registers etc... */ |
47 | typedef struct { |
38 | typedef struct { |
48 | int refcnt; /* pointer reference counter */ |
39 | int refcnt; /* pointer reference counter */ |
49 | int usecnt; /* shared by how many coroutines */ |
40 | int usecnt; /* shared by how many coroutines */ |
… | |
… | |
204 | |
195 | |
205 | return newpadlist; |
196 | return newpadlist; |
206 | } |
197 | } |
207 | |
198 | |
208 | #ifdef MAY_FLUSH |
199 | #ifdef MAY_FLUSH |
209 | STATIC AV * |
200 | STATIC void |
210 | free_padlist (AV *padlist) |
201 | free_padlist (AV *padlist) |
211 | { |
202 | { |
212 | /* may be during global destruction */ |
203 | /* may be during global destruction */ |
213 | if (SvREFCNT(padlist)) |
204 | if (SvREFCNT(padlist)) |
214 | { |
205 | { |
… | |
… | |
279 | #endif |
270 | #endif |
280 | |
271 | |
281 | #define SB do { |
272 | #define SB do { |
282 | #define SE } while (0) |
273 | #define SE } while (0) |
283 | |
274 | |
284 | #define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE |
275 | #define LOAD(state) load_state(aTHX_ (state)); |
285 | #define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE |
276 | #define SAVE(state,flags) save_state(aTHX_ (state),(flags)); |
286 | |
277 | |
287 | #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 |
288 | |
279 | |
289 | static void |
280 | static void |
290 | load_state(pTHX_ Coro__State c) |
281 | load_state(pTHX_ Coro__State c) |
… | |
… | |
364 | |
355 | |
365 | PUSHs (Nullsv); |
356 | PUSHs (Nullsv); |
366 | /* this loop was inspired by pp_caller */ |
357 | /* this loop was inspired by pp_caller */ |
367 | for (;;) |
358 | for (;;) |
368 | { |
359 | { |
369 | do |
360 | while (cxix >= 0) |
370 | { |
361 | { |
371 | PERL_CONTEXT *cx = &ccstk[cxix--]; |
362 | PERL_CONTEXT *cx = &ccstk[cxix--]; |
372 | |
363 | |
373 | if (CxTYPE(cx) == CXt_SUB) |
364 | if (CxTYPE(cx) == CXt_SUB) |
374 | { |
365 | { |
… | |
… | |
400 | /* 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? */ |
401 | /* my bold guess is as a simple, plain sub... */ |
392 | /* my bold guess is as a simple, plain sub... */ |
402 | 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"); |
403 | } |
394 | } |
404 | } |
395 | } |
405 | while (cxix >= 0); |
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406 | |
396 | |
407 | if (top_si->si_type == PERLSI_MAIN) |
397 | if (top_si->si_type == PERLSI_MAIN) |
408 | break; |
398 | break; |
409 | |
399 | |
410 | top_si = top_si->si_prev; |
400 | top_si = top_si->si_prev; |
… | |
… | |
416 | } |
406 | } |
417 | |
407 | |
418 | 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; |
419 | c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
409 | c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
420 | c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
410 | c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
421 | |
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422 | /* I have not the slightest idea of why av_reify is necessary */ |
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423 | /* but if it's missing the defav contents magically get replaced sometimes */ |
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424 | if (c->defav) |
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425 | av_reify (c->defav); |
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426 | |
411 | |
427 | c->dowarn = PL_dowarn; |
412 | c->dowarn = PL_dowarn; |
428 | c->in_eval = PL_in_eval; |
413 | c->in_eval = PL_in_eval; |
429 | |
414 | |
430 | c->curstackinfo = PL_curstackinfo; |
415 | c->curstackinfo = PL_curstackinfo; |
… | |
… | |
523 | dSP; |
508 | dSP; |
524 | SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); |
509 | SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); |
525 | PUTBACK; /* possibly superfluous */ |
510 | PUTBACK; /* possibly superfluous */ |
526 | } |
511 | } |
527 | |
512 | |
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|
513 | if (PL_main_cv != Nullcv) /* don't during destruction. hack? */ |
528 | dounwind(-1); |
514 | dounwind(-1); |
529 | |
515 | |
530 | SvREFCNT_dec(PL_curstackinfo->si_stack); |
516 | SvREFCNT_dec(PL_curstackinfo->si_stack); |
531 | Safefree(PL_curstackinfo->si_cxstack); |
517 | Safefree(PL_curstackinfo->si_cxstack); |
532 | Safefree(PL_curstackinfo); |
518 | Safefree(PL_curstackinfo); |
533 | PL_curstackinfo = p; |
519 | PL_curstackinfo = p; |
… | |
… | |
669 | } |
655 | } |
670 | |
656 | |
671 | STATIC void |
657 | STATIC void |
672 | transfer(pTHX_ struct coro *prev, struct coro *next, int flags) |
658 | transfer(pTHX_ struct coro *prev, struct coro *next, int flags) |
673 | { |
659 | { |
674 | dSP; |
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|
675 | dSTACKLEVEL; |
660 | dSTACKLEVEL; |
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|
661 | static struct coro *xnext; |
676 | |
662 | |
677 | if (prev != next) |
663 | if (prev != next) |
678 | { |
664 | { |
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|
665 | xnext = next; |
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|
666 | |
679 | if (next->mainstack) |
667 | if (next->mainstack) |
680 | { |
668 | { |
681 | SAVE (prev, flags); |
669 | SAVE (prev, flags); |
682 | LOAD (next); |
670 | LOAD (next); |
683 | |
671 | |
… | |
… | |
706 | continue_coro, (void *)next, |
694 | continue_coro, (void *)next, |
707 | next->stack->sptr, labs (next->stack->ssize)); |
695 | next->stack->sptr, labs (next->stack->ssize)); |
708 | } |
696 | } |
709 | |
697 | |
710 | coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
698 | coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
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|
699 | /* don't add any code here */ |
711 | } |
700 | } |
712 | |
701 | |
713 | } |
702 | } |
714 | else if (next->tmps_ix == -2) |
703 | else if (next->tmps_ix == -2) |
715 | croak ("tried to transfer to running coroutine"); |
704 | croak ("tried to transfer to running coroutine"); |
… | |
… | |
736 | allocate_stack (next, 1); |
725 | allocate_stack (next, 1); |
737 | coro_create (&(next->stack->cctx), |
726 | coro_create (&(next->stack->cctx), |
738 | setup_coro, (void *)next, |
727 | setup_coro, (void *)next, |
739 | next->stack->sptr, labs (next->stack->ssize)); |
728 | next->stack->sptr, labs (next->stack->ssize)); |
740 | coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
729 | coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
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|
730 | /* don't add any code here */ |
741 | } |
731 | } |
742 | } |
732 | } |
743 | else |
733 | else |
744 | setup_coro (next); |
734 | setup_coro (next); |
745 | } |
735 | } |
746 | } |
736 | } |
747 | |
737 | |
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|
738 | /* |
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|
739 | * xnext is now either prev or next, depending on wether |
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740 | * we switched the c stack or not. that's why i use a global |
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741 | * variable, that should become thread-specific at one point. |
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742 | */ |
748 | next->cursp = stacklevel; |
743 | xnext->cursp = stacklevel; |
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744 | } |
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745 | |
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746 | static struct coro * |
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747 | sv_to_coro (SV *arg, const char *funcname, const char *varname) |
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748 | { |
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749 | if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) |
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750 | { |
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751 | HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); |
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752 | |
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753 | if (!he) |
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754 | croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); |
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755 | |
|
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756 | arg = HeVAL(he); |
|
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757 | } |
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758 | |
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759 | /* must also be changed inside Coro::Cont::yield */ |
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760 | if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) |
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761 | return (struct coro *) SvIV((SV*)SvRV(arg)); |
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762 | |
|
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763 | croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); |
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764 | /*NORETURN*/ |
|
|
765 | } |
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766 | |
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767 | static void |
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768 | api_transfer(pTHX_ SV *prev, SV *next, int flags) |
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769 | { |
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770 | transfer(aTHX_ |
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771 | sv_to_coro (prev, "Coro::transfer", "prev"), |
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772 | sv_to_coro (next, "Coro::transfer", "next"), |
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773 | flags); |
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774 | } |
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775 | |
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|
776 | /** Coro ********************************************************************/ |
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777 | |
|
|
778 | #define PRIO_MAX 3 |
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779 | #define PRIO_HIGH 1 |
|
|
780 | #define PRIO_NORMAL 0 |
|
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781 | #define PRIO_LOW -1 |
|
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782 | #define PRIO_IDLE -3 |
|
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783 | #define PRIO_MIN -4 |
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784 | |
|
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785 | /* for Coro.pm */ |
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786 | static GV *coro_current, *coro_idle; |
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787 | static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; |
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788 | static int coro_nready; |
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789 | |
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790 | static void |
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791 | coro_enq (SV *sv) |
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792 | { |
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793 | if (SvROK (sv)) |
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794 | { |
|
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795 | SV *hv = SvRV (sv); |
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796 | if (SvTYPE (hv) == SVt_PVHV) |
|
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797 | { |
|
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798 | SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); |
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799 | int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; |
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800 | |
|
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801 | prio = prio > PRIO_MAX ? PRIO_MAX |
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802 | : prio < PRIO_MIN ? PRIO_MIN |
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803 | : prio; |
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804 | |
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805 | av_push (coro_ready [prio - PRIO_MIN], sv); |
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806 | coro_nready++; |
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807 | |
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808 | return; |
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809 | } |
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810 | } |
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811 | |
|
|
812 | croak ("Coro::ready tried to enqueue something that is not a coroutine"); |
|
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813 | } |
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814 | |
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815 | static SV * |
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816 | coro_deq (int min_prio) |
|
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817 | { |
|
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818 | int prio = PRIO_MAX - PRIO_MIN; |
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819 | |
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820 | min_prio -= PRIO_MIN; |
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821 | if (min_prio < 0) |
|
|
822 | min_prio = 0; |
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823 | |
|
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824 | for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) |
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825 | if (av_len (coro_ready[prio]) >= 0) |
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826 | { |
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827 | coro_nready--; |
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828 | return av_shift (coro_ready[prio]); |
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|
829 | } |
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830 | |
|
|
831 | return 0; |
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|
832 | } |
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833 | |
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834 | static void |
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835 | api_ready (SV *coro) |
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836 | { |
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837 | coro_enq (SvREFCNT_inc (coro)); |
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838 | } |
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839 | |
|
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840 | static void |
|
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841 | api_schedule (int cede) |
|
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842 | { |
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843 | SV *prev, *next; |
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844 | |
|
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845 | prev = GvSV (coro_current); |
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846 | |
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847 | if (cede) |
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848 | coro_enq (SvREFCNT_inc (prev)); |
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849 | |
|
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850 | next = coro_deq (PRIO_MIN); |
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851 | |
|
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852 | if (!next) |
|
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853 | next = SvREFCNT_inc (GvSV (coro_idle)); |
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854 | |
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855 | GvSV (coro_current) = SvREFCNT_inc (next); |
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856 | transfer (aTHX_ |
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857 | sv_to_coro (prev, "Coro::schedule", "current coroutine"), |
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858 | sv_to_coro (next, "Coro::schedule", "next coroutine"), |
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859 | TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); |
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860 | SvREFCNT_dec (next); |
|
|
861 | SvREFCNT_dec (prev); |
749 | } |
862 | } |
750 | |
863 | |
751 | MODULE = Coro::State PACKAGE = Coro::State |
864 | MODULE = Coro::State PACKAGE = Coro::State |
752 | |
865 | |
753 | PROTOTYPES: ENABLE |
866 | PROTOTYPES: ENABLE |
… | |
… | |
765 | |
878 | |
766 | if (!padlist_cache) |
879 | if (!padlist_cache) |
767 | padlist_cache = newHV (); |
880 | padlist_cache = newHV (); |
768 | |
881 | |
769 | main_mainstack = PL_mainstack; |
882 | main_mainstack = PL_mainstack; |
|
|
883 | |
|
|
884 | coroapi.ver = CORO_API_VERSION; |
|
|
885 | coroapi.transfer = api_transfer; |
770 | } |
886 | } |
771 | |
887 | |
772 | Coro::State |
888 | Coro::State |
773 | _newprocess(args) |
889 | _newprocess(args) |
774 | SV * args |
890 | SV * args |
… | |
… | |
788 | RETVAL = coro; |
904 | RETVAL = coro; |
789 | OUTPUT: |
905 | OUTPUT: |
790 | RETVAL |
906 | RETVAL |
791 | |
907 | |
792 | void |
908 | void |
793 | transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) |
909 | transfer(prev, next, flags) |
794 | Coro::State_or_hashref prev |
910 | Coro::State_or_hashref prev |
795 | Coro::State_or_hashref next |
911 | Coro::State_or_hashref next |
796 | int flags |
912 | int flags |
797 | PROTOTYPE: @ |
913 | PROTOTYPE: @ |
798 | CODE: |
914 | CODE: |
|
|
915 | PUTBACK; |
799 | transfer (aTHX_ prev, next, flags); |
916 | transfer (aTHX_ prev, next, flags); |
|
|
917 | SPAGAIN; |
800 | |
918 | |
801 | void |
919 | void |
802 | DESTROY(coro) |
920 | DESTROY(coro) |
803 | Coro::State coro |
921 | Coro::State coro |
804 | CODE: |
922 | CODE: |
805 | |
923 | |
806 | if (coro->mainstack && coro->mainstack != main_mainstack) |
924 | if (coro->mainstack && coro->mainstack != main_mainstack) |
807 | { |
925 | { |
808 | struct coro temp; |
926 | struct coro temp; |
809 | |
927 | |
|
|
928 | PUTBACK; |
810 | SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); |
929 | SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); |
811 | LOAD(aTHX_ coro); |
930 | LOAD(aTHX_ coro); |
|
|
931 | SPAGAIN; |
812 | |
932 | |
813 | destroy_stacks (aTHX); |
933 | destroy_stacks (aTHX); |
814 | |
934 | |
815 | LOAD((&temp)); /* this will get rid of defsv etc.. */ |
935 | LOAD((&temp)); /* this will get rid of defsv etc.. */ |
|
|
936 | SPAGAIN; |
816 | |
937 | |
817 | coro->mainstack = 0; |
938 | coro->mainstack = 0; |
818 | } |
939 | } |
819 | |
940 | |
820 | deallocate_stack (coro); |
941 | deallocate_stack (coro); |
… | |
… | |
826 | CODE: |
947 | CODE: |
827 | #ifdef MAY_FLUSH |
948 | #ifdef MAY_FLUSH |
828 | flush_padlist_cache (); |
949 | flush_padlist_cache (); |
829 | #endif |
950 | #endif |
830 | |
951 | |
|
|
952 | void |
|
|
953 | _exit(code) |
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|
954 | int code |
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|
955 | PROTOTYPE: $ |
|
|
956 | CODE: |
|
|
957 | #if defined(__GLIBC__) || _POSIX_C_SOURCE |
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958 | _exit (code); |
|
|
959 | #else |
|
|
960 | signal (SIGTERM, SIG_DFL); |
|
|
961 | raise (SIGTERM); |
|
|
962 | exit (code); |
|
|
963 | #endif |
|
|
964 | |
831 | MODULE = Coro::State PACKAGE = Coro::Cont |
965 | MODULE = Coro::State PACKAGE = Coro::Cont |
832 | |
966 | |
833 | # this is slightly dirty |
967 | # this is slightly dirty (should expose a c-level api) |
834 | |
968 | |
835 | void |
969 | void |
836 | yield(...) |
970 | yield(...) |
837 | PROTOTYPE: @ |
971 | PROTOTYPE: @ |
838 | CODE: |
972 | CODE: |
… | |
… | |
856 | next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); |
990 | next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); |
857 | SvREFCNT_dec (sv); |
991 | SvREFCNT_dec (sv); |
858 | |
992 | |
859 | transfer(aTHX_ prev, next, 0); |
993 | transfer(aTHX_ prev, next, 0); |
860 | |
994 | |
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995 | MODULE = Coro::State PACKAGE = Coro |
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996 | |
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997 | # this is slightly dirty (should expose a c-level api) |
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998 | |
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999 | BOOT: |
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1000 | { |
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1001 | int i; |
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1002 | HV *stash = gv_stashpv ("Coro", TRUE); |
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1003 | |
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1004 | newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); |
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1005 | newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); |
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1006 | newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); |
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1007 | newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); |
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1008 | newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); |
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1009 | newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); |
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1010 | |
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1011 | coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); |
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1012 | coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); |
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1013 | |
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1014 | for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) |
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1015 | coro_ready[i] = newAV (); |
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1016 | |
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1017 | { |
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1018 | SV *sv = perl_get_sv("Coro::API", 1); |
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1019 | |
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1020 | coroapi.schedule = api_schedule; |
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1021 | coroapi.ready = api_ready; |
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1022 | coroapi.nready = &coro_nready; |
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1023 | coroapi.current = coro_current; |
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1024 | |
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1025 | GCoroAPI = &coroapi; |
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1026 | sv_setiv(sv, (IV)&coroapi); |
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1027 | SvREADONLY_on(sv); |
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1028 | } |
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1029 | } |
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1030 | |
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1031 | void |
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1032 | ready(self) |
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1033 | SV * self |
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1034 | CODE: |
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1035 | api_ready (self); |
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1036 | |
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1037 | int |
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1038 | nready(...) |
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1039 | PROTOTYPE: |
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1040 | CODE: |
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1041 | RETVAL = coro_nready; |
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1042 | OUTPUT: |
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1043 | RETVAL |
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1044 | |
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1045 | void |
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1046 | schedule(...) |
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1047 | PROTOTYPE: |
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1048 | ALIAS: |
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1049 | cede = 1 |
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1050 | CODE: |
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1051 | api_schedule (ix); |
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1052 | |