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Comparing Coro/Coro/State.xs (file contents):
Revision 1.27 by root, Mon Aug 20 16:58:19 2001 UTC vs.
Revision 1.38 by root, Wed Nov 7 00:21:06 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 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
31#define IN_DESTRUCT (PL_main_cv == Nullcv)
30 32
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 33#define labs(l) ((l) >= 0 ? (l) : -(l))
32 34
33#include "CoroAPI.h" 35#include "CoroAPI.h"
34 36
… …
54 56
55 /* optionally saved, might be zero */ 57 /* optionally saved, might be zero */
56 AV *defav; 58 AV *defav;
57 SV *defsv; 59 SV *defsv;
58 SV *errsv; 60 SV *errsv;
61 /* TODO: PL_pmop might be nice && effortless to save. */
59 62
60 /* saved global state not related to stacks */ 63 /* saved global state not related to stacks */
61 U8 dowarn; 64 U8 dowarn;
62 I32 in_eval; 65 I32 in_eval;
63 66
… …
270#endif 273#endif
271 274
272#define SB do { 275#define SB do {
273#define SE } while (0) 276#define SE } while (0)
274 277
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 278#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 279#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277 280
278#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
279 282
280static void 283static void
281load_state(pTHX_ Coro__State c) 284load_state(pTHX_ Coro__State c)
… …
355 358
356 PUSHs (Nullsv); 359 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 360 /* this loop was inspired by pp_caller */
358 for (;;) 361 for (;;)
359 { 362 {
360 do 363 while (cxix >= 0)
361 { 364 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 365 PERL_CONTEXT *cx = &ccstk[cxix--];
363 366
364 if (CxTYPE(cx) == CXt_SUB) 367 if (CxTYPE(cx) == CXt_SUB)
365 { 368 {
… …
391 /* 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? */
392 /* my bold guess is as a simple, plain sub... */ 395 /* my bold guess is as a simple, plain sub... */
393 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");
394 } 397 }
395 } 398 }
396 while (cxix >= 0);
397 399
398 if (top_si->si_type == PERLSI_MAIN) 400 if (top_si->si_type == PERLSI_MAIN)
399 break; 401 break;
400 402
401 top_si = top_si->si_prev; 403 top_si = top_si->si_prev;
… …
407 } 409 }
408 410
409 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;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 412 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 413 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);
417 414
418 c->dowarn = PL_dowarn; 415 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval; 416 c->in_eval = PL_in_eval;
420 417
421 c->curstackinfo = PL_curstackinfo; 418 c->curstackinfo = PL_curstackinfo;
… …
493 * still there is a memleak of 128 bytes... 490 * still there is a memleak of 128 bytes...
494 */ 491 */
495STATIC void 492STATIC void
496destroy_stacks(pTHX) 493destroy_stacks(pTHX)
497{ 494{
495 if (!IN_DESTRUCT)
496 {
498 /* is this ugly, I ask? */ 497 /* is this ugly, I ask? */
499 while (PL_scopestack_ix) 498 while (PL_scopestack_ix)
500 LEAVE; 499 LEAVE;
501 500
502 /* sure it is, but more important: is it correct?? :/ */ 501 /* sure it is, but more important: is it correct?? :/ */
503 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 */
504 FREETMPS; 503 FREETMPS;
504 }
505 505
506 while (PL_curstackinfo->si_next) 506 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 507 PL_curstackinfo = PL_curstackinfo->si_next;
508 508
509 while (PL_curstackinfo) 509 while (PL_curstackinfo)
… …
514 dSP; 514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */ 516 PUTBACK; /* possibly superfluous */
517 } 517 }
518 518
519 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */ 519 if (!IN_DESTRUCT)
520 {
520 dounwind(-1); 521 dounwind(-1);
521
522 SvREFCNT_dec(PL_curstackinfo->si_stack); 522 SvREFCNT_dec(PL_curstackinfo->si_stack);
523 }
524
523 Safefree(PL_curstackinfo->si_cxstack); 525 Safefree(PL_curstackinfo->si_cxstack);
524 Safefree(PL_curstackinfo); 526 Safefree(PL_curstackinfo);
525 PL_curstackinfo = p; 527 PL_curstackinfo = p;
526 } 528 }
527 529
… …
542 stack->refcnt = 1; 544 stack->refcnt = 1;
543 stack->usecnt = 1; 545 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0; 546 stack->gencnt = ctx->gencnt = 0;
545 if (alloc) 547 if (alloc)
546 { 548 {
547#ifdef HAVE_MMAP 549#if HAVE_MMAP
548 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 */
549 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);
550 if (stack->sptr == (void *)-1) 552 if (stack->sptr == (void *)-1)
551#endif 553#endif
552 { 554 {
553 /*FIXME*//*D*//* reasonable stack size! */ 555 /*FIXME*//*D*//* reasonable stack size! */
554 stack->ssize = -4096 * sizeof (long); 556 stack->ssize = -4096 * sizeof (long);
… …
649{ 651{
650 /* 652 /*
651 * this is a _very_ stripped down perl interpreter ;) 653 * this is a _very_ stripped down perl interpreter ;)
652 */ 654 */
653 Coro__State ctx = (Coro__State)arg; 655 Coro__State ctx = (Coro__State)arg;
656 JMPENV coro_start_env;
654 657
655 /*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
656 ctx->cursp = 0; 664 ctx->cursp = 0;
657 PL_op = PL_op->op_next; 665 PL_op = PL_op->op_next;
658 CALLRUNOPS(aTHX); 666 CALLRUNOPS(aTHX);
659 667
660 abort (); 668 abort ();
661} 669}
662 670
663STATIC void 671STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 672transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{ 673{
666 dSP;
667 dSTACKLEVEL; 674 dSTACKLEVEL;
675 static struct coro *xnext;
668 676
669 if (prev != next) 677 if (prev != next)
670 { 678 {
679 xnext = next;
680
671 if (next->mainstack) 681 if (next->mainstack)
672 { 682 {
673 SAVE (prev, flags); 683 SAVE (prev, flags);
674 LOAD (next); 684 LOAD (next);
675 685
… …
698 continue_coro, (void *)next, 708 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize)); 709 next->stack->sptr, labs (next->stack->ssize));
700 } 710 }
701 711
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713 /* don't add any code here */
703 } 714 }
704 715
705 } 716 }
706 else if (next->tmps_ix == -2) 717 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine"); 718 croak ("tried to transfer to running coroutine");
… …
728 allocate_stack (next, 1); 739 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx), 740 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next, 741 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize)); 742 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 /* don't add any code here */
733 } 745 }
734 } 746 }
735 else 747 else
736 setup_coro (next); 748 setup_coro (next);
737 } 749 }
738 }
739 750
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 */
740 next->cursp = stacklevel; 756 xnext->cursp = stacklevel;
757 }
741} 758}
742 759
743static struct coro * 760static struct coro *
744sv_to_coro (SV *arg, const char *funcname, const char *varname) 761sv_to_coro (SV *arg, const char *funcname, const char *varname)
745{ 762{
… …
752 769
753 arg = HeVAL(he); 770 arg = HeVAL(he);
754 } 771 }
755 772
756 /* must also be changed inside Coro::Cont::yield */ 773 /* must also be changed inside Coro::Cont::yield */
774 if (SvROK(arg) && SvOBJECT(SvRV(arg))
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 775 && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg)); 776 return (struct coro *) SvIV((SV*)SvRV(arg));
759 777
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 778 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761 /*NORETURN*/ 779 /*NORETURN*/
762} 780}
… …
920 938
921 if (coro->mainstack && coro->mainstack != main_mainstack) 939 if (coro->mainstack && coro->mainstack != main_mainstack)
922 { 940 {
923 struct coro temp; 941 struct coro temp;
924 942
943 PUTBACK;
925 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 944 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
926 LOAD(aTHX_ coro); 945 LOAD(aTHX_ coro);
946 SPAGAIN;
927 947
928 destroy_stacks (aTHX); 948 destroy_stacks (aTHX);
929 949
930 LOAD((&temp)); /* this will get rid of defsv etc.. */ 950 LOAD((&temp)); /* this will get rid of defsv etc.. */
951 SPAGAIN;
931 952
932 coro->mainstack = 0; 953 coro->mainstack = 0;
933 } 954 }
934 955
935 deallocate_stack (coro); 956 deallocate_stack (coro);
… …
1023} 1044}
1024 1045
1025void 1046void
1026ready(self) 1047ready(self)
1027 SV * self 1048 SV * self
1049 PROTOTYPE: $
1028 CODE: 1050 CODE:
1029 api_ready (self); 1051 api_ready (self);
1030 1052
1031int 1053int
1032nready(...) 1054nready(...)

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