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Comparing Coro/Coro/State.xs (file contents):
Revision 1.18 by root, Thu Jul 26 03:46:15 2001 UTC vs.
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC

… …
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"
6 6
7#include <signal.h>
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
11# ifdef MAP_ANONYMOUS 12# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 13# ifdef MAP_ANON
14# define MAP_ANONYMOUS MAP_ANON
13# else 15# else
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
21/* perl-related */
22#define TRANSFER_SAVE_DEFAV 0x00000001
23#define TRANSFER_SAVE_DEFSV 0x00000002
24#define TRANSFER_SAVE_ERRSV 0x00000004
25/* c-related */
26#define TRANSFER_SAVE_CCTXT 0x00000008
27#ifdef CORO_LAZY_STACK
28# define TRANSFER_LAZY_STACK 0x00000010
29#else
30# define TRANSFER_LAZY_STACK 0x00000000
31#endif
32
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)
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
31#define IN_DESTRUCT (PL_main_cv == Nullcv)
32
44#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;
45 38
46/* 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... */
47typedef struct { 40typedef struct {
48 int refcnt; /* pointer reference counter */ 41 int refcnt; /* pointer reference counter */
49 int usecnt; /* shared by how many coroutines */ 42 int usecnt; /* shared by how many coroutines */
… …
66 SV *defsv; 59 SV *defsv;
67 SV *errsv; 60 SV *errsv;
68 61
69 /* saved global state not related to stacks */ 62 /* saved global state not related to stacks */
70 U8 dowarn; 63 U8 dowarn;
64 I32 in_eval;
71 65
72 /* the stacks and related info (callchain etc..) */ 66 /* the stacks and related info (callchain etc..) */
73 PERL_SI *curstackinfo; 67 PERL_SI *curstackinfo;
74 AV *curstack; 68 AV *curstack;
75 AV *mainstack; 69 AV *mainstack;
76 SV **stack_sp; 70 SV **stack_sp;
77 OP *op; 71 OP *op;
78 SV **curpad; 72 SV **curpad;
73 AV *comppad;
79 SV **stack_base; 74 SV **stack_base;
80 SV **stack_max; 75 SV **stack_max;
81 SV **tmps_stack; 76 SV **tmps_stack;
82 I32 tmps_floor; 77 I32 tmps_floor;
83 I32 tmps_ix; 78 I32 tmps_ix;
… …
93 I32 savestack_max; 88 I32 savestack_max;
94 OP **retstack; 89 OP **retstack;
95 I32 retstack_ix; 90 I32 retstack_ix;
96 I32 retstack_max; 91 I32 retstack_max;
97 COP *curcop; 92 COP *curcop;
98 JMPENV start_env;
99 JMPENV *top_env; 93 JMPENV *top_env;
100 94
101 /* data associated with this coroutine (initial args) */ 95 /* data associated with this coroutine (initial args) */
102 AV *args; 96 AV *args;
103}; 97};
… …
108static AV *main_mainstack; /* used to differentiate between $main and others */ 102static AV *main_mainstack; /* used to differentiate between $main and others */
109static HV *coro_state_stash; 103static HV *coro_state_stash;
110static SV *ucoro_state_sv; 104static SV *ucoro_state_sv;
111static U32 ucoro_state_hash; 105static U32 ucoro_state_hash;
112static HV *padlist_cache; 106static HV *padlist_cache;
107static SV *coro_mortal; /* will be freed after next transfer */
113 108
114/* mostly copied from op.c:cv_clone2 */ 109/* mostly copied from op.c:cv_clone2 */
115STATIC AV * 110STATIC AV *
116clone_padlist (AV *protopadlist) 111clone_padlist (AV *protopadlist)
117{ 112{
… …
204 199
205 return newpadlist; 200 return newpadlist;
206} 201}
207 202
208#ifdef MAY_FLUSH 203#ifdef MAY_FLUSH
209STATIC AV * 204STATIC void
210free_padlist (AV *padlist) 205free_padlist (AV *padlist)
211{ 206{
212 /* may be during global destruction */ 207 /* may be during global destruction */
213 if (SvREFCNT(padlist)) 208 if (SvREFCNT(padlist))
214 { 209 {
… …
279#endif 274#endif
280 275
281#define SB do { 276#define SB do {
282#define SE } while (0) 277#define SE } while (0)
283 278
284#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 279#define LOAD(state) load_state(aTHX_ (state));
285#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 280#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
286 281
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
288 283
289static void 284static void
290load_state(pTHX_ Coro__State c) 285load_state(pTHX_ Coro__State c)
291{ 286{
292 PL_dowarn = c->dowarn; 287 PL_dowarn = c->dowarn;
288 PL_in_eval = c->in_eval;
293 289
294 PL_curstackinfo = c->curstackinfo; 290 PL_curstackinfo = c->curstackinfo;
295 PL_curstack = c->curstack; 291 PL_curstack = c->curstack;
296 PL_mainstack = c->mainstack; 292 PL_mainstack = c->mainstack;
297 PL_stack_sp = c->stack_sp; 293 PL_stack_sp = c->stack_sp;
298 PL_op = c->op; 294 PL_op = c->op;
299 PL_curpad = c->curpad; 295 PL_curpad = c->curpad;
296 PL_comppad = c->comppad;
300 PL_stack_base = c->stack_base; 297 PL_stack_base = c->stack_base;
301 PL_stack_max = c->stack_max; 298 PL_stack_max = c->stack_max;
302 PL_tmps_stack = c->tmps_stack; 299 PL_tmps_stack = c->tmps_stack;
303 PL_tmps_floor = c->tmps_floor; 300 PL_tmps_floor = c->tmps_floor;
304 PL_tmps_ix = c->tmps_ix; 301 PL_tmps_ix = c->tmps_ix;
… …
314 PL_savestack_max = c->savestack_max; 311 PL_savestack_max = c->savestack_max;
315 PL_retstack = c->retstack; 312 PL_retstack = c->retstack;
316 PL_retstack_ix = c->retstack_ix; 313 PL_retstack_ix = c->retstack_ix;
317 PL_retstack_max = c->retstack_max; 314 PL_retstack_max = c->retstack_max;
318 PL_curcop = c->curcop; 315 PL_curcop = c->curcop;
319 PL_start_env = c->start_env;
320 PL_top_env = c->top_env; 316 PL_top_env = c->top_env;
321 317
322 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
323 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
324 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
… …
364 360
365 PUSHs (Nullsv); 361 PUSHs (Nullsv);
366 /* this loop was inspired by pp_caller */ 362 /* this loop was inspired by pp_caller */
367 for (;;) 363 for (;;)
368 { 364 {
369 do 365 while (cxix >= 0)
370 { 366 {
371 PERL_CONTEXT *cx = &ccstk[cxix--]; 367 PERL_CONTEXT *cx = &ccstk[cxix--];
372 368
373 if (CxTYPE(cx) == CXt_SUB) 369 if (CxTYPE(cx) == CXt_SUB)
374 { 370 {
… …
400 /* I never used formats, so how should I know how these are implemented? */ 396 /* I never used formats, so how should I know how these are implemented? */
401 /* my bold guess is as a simple, plain sub... */ 397 /* my bold guess is as a simple, plain sub... */
402 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 398 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403 } 399 }
404 } 400 }
405 while (cxix >= 0);
406 401
407 if (top_si->si_type == PERLSI_MAIN) 402 if (top_si->si_type == PERLSI_MAIN)
408 break; 403 break;
409 404
410 top_si = top_si->si_prev; 405 top_si = top_si->si_prev;
… …
417 412
418 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 413 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
419 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 414 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
420 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 415 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
421 416
422 /* I have not the slightest idea of why av_reify is necessary */
423 /* but if it's missing the defav contents magically get replaced sometimes */
424 if (c->defav)
425 av_reify (c->defav);
426
427 c->dowarn = PL_dowarn; 417 c->dowarn = PL_dowarn;
418 c->in_eval = PL_in_eval;
428 419
429 c->curstackinfo = PL_curstackinfo; 420 c->curstackinfo = PL_curstackinfo;
430 c->curstack = PL_curstack; 421 c->curstack = PL_curstack;
431 c->mainstack = PL_mainstack; 422 c->mainstack = PL_mainstack;
432 c->stack_sp = PL_stack_sp; 423 c->stack_sp = PL_stack_sp;
433 c->op = PL_op; 424 c->op = PL_op;
434 c->curpad = PL_curpad; 425 c->curpad = PL_curpad;
426 c->comppad = PL_comppad;
435 c->stack_base = PL_stack_base; 427 c->stack_base = PL_stack_base;
436 c->stack_max = PL_stack_max; 428 c->stack_max = PL_stack_max;
437 c->tmps_stack = PL_tmps_stack; 429 c->tmps_stack = PL_tmps_stack;
438 c->tmps_floor = PL_tmps_floor; 430 c->tmps_floor = PL_tmps_floor;
439 c->tmps_ix = PL_tmps_ix; 431 c->tmps_ix = PL_tmps_ix;
… …
449 c->savestack_max = PL_savestack_max; 441 c->savestack_max = PL_savestack_max;
450 c->retstack = PL_retstack; 442 c->retstack = PL_retstack;
451 c->retstack_ix = PL_retstack_ix; 443 c->retstack_ix = PL_retstack_ix;
452 c->retstack_max = PL_retstack_max; 444 c->retstack_max = PL_retstack_max;
453 c->curcop = PL_curcop; 445 c->curcop = PL_curcop;
454 c->start_env = PL_start_env;
455 c->top_env = PL_top_env; 446 c->top_env = PL_top_env;
456} 447}
457 448
458/* 449/*
459 * allocate various perl stacks. This is an exact copy 450 * allocate various perl stacks. This is an exact copy
… …
502 * still there is a memleak of 128 bytes... 493 * still there is a memleak of 128 bytes...
503 */ 494 */
504STATIC void 495STATIC void
505destroy_stacks(pTHX) 496destroy_stacks(pTHX)
506{ 497{
498 if (!IN_DESTRUCT)
499 {
507 /* is this ugly, I ask? */ 500 /* is this ugly, I ask? */
508 while (PL_scopestack_ix) 501 while (PL_scopestack_ix)
509 LEAVE; 502 LEAVE;
510 503
511 /* sure it is, but more important: is it correct?? :/ */ 504 /* sure it is, but more important: is it correct?? :/ */
512 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ 505 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
513 FREETMPS; 506 FREETMPS;
507 }
514 508
515 while (PL_curstackinfo->si_next) 509 while (PL_curstackinfo->si_next)
516 PL_curstackinfo = PL_curstackinfo->si_next; 510 PL_curstackinfo = PL_curstackinfo->si_next;
517 511
518 while (PL_curstackinfo) 512 while (PL_curstackinfo)
… …
523 dSP; 517 dSP;
524 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
525 PUTBACK; /* possibly superfluous */ 519 PUTBACK; /* possibly superfluous */
526 } 520 }
527 521
522 if (!IN_DESTRUCT)
523 {
528 dounwind(-1); 524 dounwind(-1);
529
530 SvREFCNT_dec(PL_curstackinfo->si_stack); 525 SvREFCNT_dec(PL_curstackinfo->si_stack);
526 }
527
531 Safefree(PL_curstackinfo->si_cxstack); 528 Safefree(PL_curstackinfo->si_cxstack);
532 Safefree(PL_curstackinfo); 529 Safefree(PL_curstackinfo);
533 PL_curstackinfo = p; 530 PL_curstackinfo = p;
534 } 531 }
535 532
… …
550 stack->refcnt = 1; 547 stack->refcnt = 1;
551 stack->usecnt = 1; 548 stack->usecnt = 1;
552 stack->gencnt = ctx->gencnt = 0; 549 stack->gencnt = ctx->gencnt = 0;
553 if (alloc) 550 if (alloc)
554 { 551 {
555#ifdef HAVE_MMAP 552#if HAVE_MMAP
556 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */ 553 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); 554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
558 if (stack->sptr == (void *)-1) 555 if (stack->sptr == (void *)-1)
559#endif 556#endif
560 { 557 {
561 /*FIXME*//*D*//* reasonable stack size! */ 558 /*FIXME*//*D*//* reasonable stack size! */
562 stack->ssize = -4096 * sizeof (long); 559 stack->ssize = -4096 * sizeof (long);
… …
603 dSP; 600 dSP;
604 Coro__State ctx = (Coro__State)arg; 601 Coro__State ctx = (Coro__State)arg;
605 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE); 602 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606 603
607 coro_init_stacks (aTHX); 604 coro_init_stacks (aTHX);
608 JMPENV_BOOTSTRAP;
609 SPAGAIN;
610
611 /*PL_curcop = 0;*/ 605 /*PL_curcop = 0;*/
606 /*PL_in_eval = PL_in_eval;*/ /* inherit */
612 SvREFCNT_dec (GvAV (PL_defgv)); 607 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; 608 GvAV (PL_defgv) = ctx->args;
614 609
610 SPAGAIN;
611
615 if (ctx->stack) 612 if (ctx->stack)
616 { 613 {
617 ctx->cursp = 0; 614 ctx->cursp = 0;
618 615
619 PUSHMARK(SP); 616 PUSHMARK(SP);
620 PUTBACK; 617 PUTBACK;
621 (void) call_sv (sub_init, G_VOID|G_NOARGS); 618 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
619
620 if (SvTRUE (ERRSV))
621 croak (NULL);
622 else
622 croak ("FATAL: CCTXT coroutine returned!"); 623 croak ("FATAL: CCTXT coroutine returned!");
623 } 624 }
624 else 625 else
625 { 626 {
626 UNOP myop; 627 UNOP myop;
627 628
… …
639 * that doesn't matter, though, since it is only 640 * that doesn't matter, though, since it is only
640 * pp_nextstate and we never return... 641 * pp_nextstate and we never return...
641 * ah yes, and I don't care anyways ;) 642 * ah yes, and I don't care anyways ;)
642 */ 643 */
643 PUTBACK; 644 PUTBACK;
644 PL_op = pp_entersub(); 645 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
645 SPAGAIN; 646 SPAGAIN;
646 647
647 ENTER; /* necessary e.g. for dounwind */ 648 ENTER; /* necessary e.g. for dounwind */
648 } 649 }
649} 650}
… …
653{ 654{
654 /* 655 /*
655 * this is a _very_ stripped down perl interpreter ;) 656 * this is a _very_ stripped down perl interpreter ;)
656 */ 657 */
657 Coro__State ctx = (Coro__State)arg; 658 Coro__State ctx = (Coro__State)arg;
659 JMPENV coro_start_env;
660
661 /* same as JMPENV_BOOTSTRAP */
662 Zero(&coro_start_env, 1, JMPENV);
663 coro_start_env.je_ret = -1;
664 coro_start_env.je_mustcatch = TRUE;
665 PL_top_env = &coro_start_env;
658 666
659 ctx->cursp = 0; 667 ctx->cursp = 0;
660 PL_op = PL_op->op_next; 668 PL_op = PL_op->op_next;
661 CALLRUNOPS(aTHX); 669 CALLRUNOPS(aTHX);
662 /*NORETURN*/ 670
663 abort (); 671 abort ();
664} 672}
665 673
666STATIC void 674STATIC void
667transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 675transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
668{ 676{
669 dSP;
670 dSTACKLEVEL; 677 dSTACKLEVEL;
678 static struct coro *xnext;
671 679
672 if (prev != next) 680 if (prev != next)
673 { 681 {
682 xnext = next;
683
674 if (next->mainstack) 684 if (next->mainstack)
675 { 685 {
676 SAVE (prev, flags); 686 SAVE (prev, flags);
677 LOAD (next); 687 LOAD (next);
678 688
… …
701 continue_coro, (void *)next, 711 continue_coro, (void *)next,
702 next->stack->sptr, labs (next->stack->ssize)); 712 next->stack->sptr, labs (next->stack->ssize));
703 } 713 }
704 714
705 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716 /* don't add any code here */
706 } 717 }
707 718
708 } 719 }
709 else if (next->tmps_ix == -2) 720 else if (next->tmps_ix == -2)
710 croak ("tried to transfer to running coroutine"); 721 croak ("tried to transfer to running coroutine");
… …
731 allocate_stack (next, 1); 742 allocate_stack (next, 1);
732 coro_create (&(next->stack->cctx), 743 coro_create (&(next->stack->cctx),
733 setup_coro, (void *)next, 744 setup_coro, (void *)next,
734 next->stack->sptr, labs (next->stack->ssize)); 745 next->stack->sptr, labs (next->stack->ssize));
735 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 746 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747 /* don't add any code here */
736 } 748 }
737 } 749 }
738 else 750 else
739 setup_coro (next); 751 setup_coro (next);
740 } 752 }
741 }
742 753
754 /*
755 * xnext is now either prev or next, depending on wether
756 * we switched the c stack or not. that's why I use a global
757 * variable, that should become thread-specific at one point.
758 */
743 next->cursp = stacklevel; 759 xnext->cursp = stacklevel;
760 }
761
762 if (coro_mortal)
763 {
764 SvREFCNT_dec (coro_mortal);
765 coro_mortal = 0;
766 }
767}
768
769#define SV_CORO(sv,func) \
770 do { \
771 if (SvROK (sv)) \
772 sv = SvRV (sv); \
773 \
774 if (SvTYPE(sv) == SVt_PVHV) \
775 { \
776 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
777 \
778 if (!he) \
779 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
780 \
781 (sv) = SvRV (HeVAL(he)); \
782 } \
783 \
784 /* must also be changed inside Coro::Cont::yield */ \
785 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
786 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
787 \
788 } while(0)
789
790#define SvSTATE(sv) (struct coro *)SvIV (sv)
791
792static void
793api_transfer(pTHX_ SV *prev, SV *next, int flags)
794{
795 SV_CORO (prev, "Coro::transfer");
796 SV_CORO (next, "Coro::transfer");
797
798 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
799}
800
801/** Coro ********************************************************************/
802
803#define PRIO_MAX 3
804#define PRIO_HIGH 1
805#define PRIO_NORMAL 0
806#define PRIO_LOW -1
807#define PRIO_IDLE -3
808#define PRIO_MIN -4
809
810/* for Coro.pm */
811static GV *coro_current, *coro_idle;
812static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
813static int coro_nready;
814
815static void
816coro_enq (SV *sv)
817{
818 if (SvTYPE (sv) == SVt_PVHV)
819 {
820 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
821 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
822
823 prio = prio > PRIO_MAX ? PRIO_MAX
824 : prio < PRIO_MIN ? PRIO_MIN
825 : prio;
826
827 av_push (coro_ready [prio - PRIO_MIN], sv);
828 coro_nready++;
829
830 return;
831 }
832
833 croak ("Coro::ready tried to enqueue something that is not a coroutine");
834}
835
836static SV *
837coro_deq (int min_prio)
838{
839 int prio = PRIO_MAX - PRIO_MIN;
840
841 min_prio -= PRIO_MIN;
842 if (min_prio < 0)
843 min_prio = 0;
844
845 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
846 if (av_len (coro_ready[prio]) >= 0)
847 {
848 coro_nready--;
849 return av_shift (coro_ready[prio]);
850 }
851
852 return 0;
853}
854
855static void
856api_ready (SV *coro)
857{
858 if (SvROK (coro))
859 coro = SvRV (coro);
860
861 coro_enq (SvREFCNT_inc (coro));
862}
863
864static void
865api_schedule (void)
866{
867 SV *prev, *next;
868
869 prev = SvRV (GvSV (coro_current));
870 next = coro_deq (PRIO_MIN);
871
872 if (!next)
873 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
874
875 /* free this only after the transfer */
876 coro_mortal = prev;
877 SV_CORO (prev, "Coro::schedule");
878
879 SvRV (GvSV (coro_current)) = next;
880
881 SV_CORO (next, "Coro::schedule");
882
883 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
884 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
885}
886
887static void
888api_cede (void)
889{
890 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
891
892 api_schedule ();
744} 893}
745 894
746MODULE = Coro::State PACKAGE = Coro::State 895MODULE = Coro::State PACKAGE = Coro::State
747 896
748PROTOTYPES: ENABLE 897PROTOTYPES: ENABLE
… …
760 909
761 if (!padlist_cache) 910 if (!padlist_cache)
762 padlist_cache = newHV (); 911 padlist_cache = newHV ();
763 912
764 main_mainstack = PL_mainstack; 913 main_mainstack = PL_mainstack;
914
915 coroapi.ver = CORO_API_VERSION;
916 coroapi.transfer = api_transfer;
765} 917}
766 918
767Coro::State 919Coro::State
768_newprocess(args) 920_newprocess(args)
769 SV * args 921 SV * args
… …
783 RETVAL = coro; 935 RETVAL = coro;
784 OUTPUT: 936 OUTPUT:
785 RETVAL 937 RETVAL
786 938
787void 939void
788transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 940transfer(prev, next, flags)
789 Coro::State_or_hashref prev 941 SV *prev
790 Coro::State_or_hashref next 942 SV *next
791 int flags 943 int flags
792 PROTOTYPE: @ 944 PROTOTYPE: @
793 CODE: 945 CODE:
946 PUTBACK;
947 SV_CORO (next, "Coro::transfer");
948 SV_CORO (prev, "Coro::transfer");
794 transfer (aTHX_ prev, next, flags); 949 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
950 SPAGAIN;
795 951
796void 952void
797DESTROY(coro) 953DESTROY(coro)
798 Coro::State coro 954 Coro::State coro
799 CODE: 955 CODE:
800 956
801 if (coro->mainstack && coro->mainstack != main_mainstack) 957 if (coro->mainstack && coro->mainstack != main_mainstack)
802 { 958 {
803 struct coro temp; 959 struct coro temp;
804 960
961 PUTBACK;
805 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 962 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
806 LOAD(aTHX_ coro); 963 LOAD(aTHX_ coro);
964 SPAGAIN;
807 965
808 destroy_stacks (aTHX); 966 destroy_stacks (aTHX);
809 967
810 LOAD((&temp)); /* this will get rid of defsv etc.. */ 968 LOAD((&temp)); /* this will get rid of defsv etc.. */
969 SPAGAIN;
811 970
812 coro->mainstack = 0; 971 coro->mainstack = 0;
813 } 972 }
814 973
815 deallocate_stack (coro); 974 deallocate_stack (coro);
… …
821 CODE: 980 CODE:
822#ifdef MAY_FLUSH 981#ifdef MAY_FLUSH
823 flush_padlist_cache (); 982 flush_padlist_cache ();
824#endif 983#endif
825 984
985void
986_exit(code)
987 int code
988 PROTOTYPE: $
989 CODE:
990#if defined(__GLIBC__) || _POSIX_C_SOURCE
991 _exit (code);
992#else
993 signal (SIGTERM, SIG_DFL);
994 raise (SIGTERM);
995 exit (code);
996#endif
997
826MODULE = Coro::State PACKAGE = Coro::Cont 998MODULE = Coro::State PACKAGE = Coro::Cont
827 999
828# this is slightly dirty 1000# this is slightly dirty (should expose a c-level api)
829 1001
830void 1002void
831yield(...) 1003yield(...)
832 PROTOTYPE: @ 1004 PROTOTYPE: @
833 CODE: 1005 CODE:
… …
851 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 1023 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
852 SvREFCNT_dec (sv); 1024 SvREFCNT_dec (sv);
853 1025
854 transfer(aTHX_ prev, next, 0); 1026 transfer(aTHX_ prev, next, 0);
855 1027
1028MODULE = Coro::State PACKAGE = Coro
1029
1030# this is slightly dirty (should expose a c-level api)
1031
1032BOOT:
1033{
1034 int i;
1035 HV *stash = gv_stashpv ("Coro", TRUE);
1036
1037 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043
1044 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046
1047 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048 coro_ready[i] = newAV ();
1049
1050 {
1051 SV *sv = perl_get_sv("Coro::API", 1);
1052
1053 coroapi.schedule = api_schedule;
1054 coroapi.cede = api_cede;
1055 coroapi.ready = api_ready;
1056 coroapi.nready = &coro_nready;
1057 coroapi.current = coro_current;
1058
1059 GCoroAPI = &coroapi;
1060 sv_setiv(sv, (IV)&coroapi);
1061 SvREADONLY_on(sv);
1062 }
1063}
1064
1065void
1066ready(self)
1067 SV * self
1068 PROTOTYPE: $
1069 CODE:
1070 api_ready (self);
1071
1072int
1073nready(...)
1074 PROTOTYPE:
1075 CODE:
1076 RETVAL = coro_nready;
1077 OUTPUT:
1078 RETVAL
1079
1080void
1081schedule(...)
1082 PROTOTYPE:
1083 CODE:
1084 api_schedule ();
1085
1086void
1087cede(...)
1088 PROTOTYPE:
1089 CODE:
1090 api_cede ();
1091

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