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/cvs/Coro/Coro/State.xs
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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 1.30 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))
… …
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)
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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{
… …
920 923
921 if (coro->mainstack && coro->mainstack != main_mainstack) 924 if (coro->mainstack && coro->mainstack != main_mainstack)
922 { 925 {
923 struct coro temp; 926 struct coro temp;
924 927
928 PUTBACK;
925 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 929 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
926 LOAD(aTHX_ coro); 930 LOAD(aTHX_ coro);
931 SPAGAIN;
927 932
928 destroy_stacks (aTHX); 933 destroy_stacks (aTHX);
929 934
930 LOAD((&temp)); /* this will get rid of defsv etc.. */ 935 LOAD((&temp)); /* this will get rid of defsv etc.. */
936 SPAGAIN;
931 937
932 coro->mainstack = 0; 938 coro->mainstack = 0;
933 } 939 }
934 940
935 deallocate_stack (coro); 941 deallocate_stack (coro);

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