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Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.45 by root, Tue May 27 01:15:31 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>
12# ifndef MAP_ANONYMOUS
13# ifdef MAP_ANON
14# define MAP_ANONYMOUS MAP_ANON
15# else
16# undef HAVE_MMAP
17# endif
18# endif
10#endif 19#endif
11 20
12#define MAY_FLUSH /* increases codesize */ 21#define MAY_FLUSH /* increases codesize and is rarely used */
13 22
14#define SUB_INIT "Coro::State::initialize" 23#define SUB_INIT "Coro::State::initialize"
24#define UCORO_STATE "_coro_state"
15 25
16#define TRANSFER_SAVE_DEFAV 0x00000001 26/* The next macro should declare a variable stacklevel that contains and approximation
17#define TRANSFER_SAVE_DEFSV 0x00000002 27 * to the current C stack pointer. Its property is that it changes with each call
18#define TRANSFER_SAVE_ERRSV 0x00000004 28 * and should be unique. */
19#define TRANSFER_SAVE_CCTXT 0x00000008 29#define dSTACKLEVEL void *stacklevel = &stacklevel
20 30
21#define TRANSFER_SAVE_ALL -1 31#define IN_DESTRUCT (PL_main_cv == Nullcv)
32
33#define labs(l) ((l) >= 0 ? (l) : -(l))
34
35#include "CoroAPI.h"
36
37static struct CoroAPI coroapi;
38
39/* this is actually not only the c stack but also c registers etc... */
40typedef struct {
41 int refcnt; /* pointer reference counter */
42 int usecnt; /* shared by how many coroutines */
43 int gencnt; /* generation counter */
44
45 coro_context cctx;
46
47 void *sptr;
48 long ssize; /* positive == mmap, otherwise malloc */
49} coro_stack;
22 50
23struct coro { 51struct coro {
52 /* the top-level JMPENV for each coroutine, needed to catch dies. */
53 JMPENV start_env;
54
24 /* the optional C context */ 55 /* the optional C context */
25 coro_context cctx; 56 coro_stack *stack;
26 void *sptr; 57 void *cursp;
27 long ssize; 58 int gencnt;
28 59
29 /* optionally saved, might be zero */ 60 /* optionally saved, might be zero */
30 AV *defav; 61 AV *defav;
31 SV *defsv; 62 SV *defsv;
32 SV *errsv; 63 SV *errsv;
33 64
34 /* saved global state not related to stacks */ 65 /* saved global state not related to stacks */
35 U8 dowarn; 66 U8 dowarn;
67 I32 in_eval;
36 68
37 /* the stacks and related info (callchain etc..) */ 69 /* the stacks and related info (callchain etc..) */
38 PERL_SI *curstackinfo; 70 PERL_SI *curstackinfo;
39 AV *curstack; 71 AV *curstack;
40 AV *mainstack; 72 AV *mainstack;
41 SV **stack_sp; 73 SV **stack_sp;
42 OP *op; 74 OP *op;
43 SV **curpad; 75 SV **curpad;
76 AV *comppad;
44 SV **stack_base; 77 SV **stack_base;
45 SV **stack_max; 78 SV **stack_max;
46 SV **tmps_stack; 79 SV **tmps_stack;
47 I32 tmps_floor; 80 I32 tmps_floor;
48 I32 tmps_ix; 81 I32 tmps_ix;
… …
58 I32 savestack_max; 91 I32 savestack_max;
59 OP **retstack; 92 OP **retstack;
60 I32 retstack_ix; 93 I32 retstack_ix;
61 I32 retstack_max; 94 I32 retstack_max;
62 COP *curcop; 95 COP *curcop;
63 JMPENV start_env;
64 JMPENV *top_env; 96 JMPENV *top_env;
65 97
66 /* data associated with this coroutine (initial args) */ 98 /* data associated with this coroutine (initial args) */
67 AV *args; 99 AV *args;
68}; 100};
… …
70typedef struct coro *Coro__State; 102typedef struct coro *Coro__State;
71typedef struct coro *Coro__State_or_hashref; 103typedef struct coro *Coro__State_or_hashref;
72 104
73static AV *main_mainstack; /* used to differentiate between $main and others */ 105static AV *main_mainstack; /* used to differentiate between $main and others */
74static HV *coro_state_stash; 106static HV *coro_state_stash;
107static SV *ucoro_state_sv;
108static U32 ucoro_state_hash;
75static HV *padlist_cache; 109static HV *padlist_cache;
110static SV *coro_mortal; /* will be freed after next transfer */
76 111
77/* mostly copied from op.c:cv_clone2 */ 112/* mostly copied from op.c:cv_clone2 */
78STATIC AV * 113STATIC AV *
79clone_padlist (AV *protopadlist) 114clone_padlist (AV *protopadlist)
80{ 115{
… …
167 202
168 return newpadlist; 203 return newpadlist;
169} 204}
170 205
171#ifdef MAY_FLUSH 206#ifdef MAY_FLUSH
172STATIC AV * 207STATIC void
173free_padlist (AV *padlist) 208free_padlist (AV *padlist)
174{ 209{
175 /* may be during global destruction */ 210 /* may be during global destruction */
176 if (SvREFCNT(padlist)) 211 if (SvREFCNT(padlist))
177 { 212 {
… …
242#endif 277#endif
243 278
244#define SB do { 279#define SB do {
245#define SE } while (0) 280#define SE } while (0)
246 281
247#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 282#define LOAD(state) load_state(aTHX_ (state));
248#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 283#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
249 284
250#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
251 286
252static void 287static void
253load_state(pTHX_ Coro__State c) 288load_state(pTHX_ Coro__State c)
254{ 289{
255 PL_dowarn = c->dowarn; 290 PL_dowarn = c->dowarn;
291 PL_in_eval = c->in_eval;
256 292
257 PL_curstackinfo = c->curstackinfo; 293 PL_curstackinfo = c->curstackinfo;
258 PL_curstack = c->curstack; 294 PL_curstack = c->curstack;
259 PL_mainstack = c->mainstack; 295 PL_mainstack = c->mainstack;
260 PL_stack_sp = c->stack_sp; 296 PL_stack_sp = c->stack_sp;
261 PL_op = c->op; 297 PL_op = c->op;
262 PL_curpad = c->curpad; 298 PL_curpad = c->curpad;
299 PL_comppad = c->comppad;
263 PL_stack_base = c->stack_base; 300 PL_stack_base = c->stack_base;
264 PL_stack_max = c->stack_max; 301 PL_stack_max = c->stack_max;
265 PL_tmps_stack = c->tmps_stack; 302 PL_tmps_stack = c->tmps_stack;
266 PL_tmps_floor = c->tmps_floor; 303 PL_tmps_floor = c->tmps_floor;
267 PL_tmps_ix = c->tmps_ix; 304 PL_tmps_ix = c->tmps_ix;
… …
277 PL_savestack_max = c->savestack_max; 314 PL_savestack_max = c->savestack_max;
278 PL_retstack = c->retstack; 315 PL_retstack = c->retstack;
279 PL_retstack_ix = c->retstack_ix; 316 PL_retstack_ix = c->retstack_ix;
280 PL_retstack_max = c->retstack_max; 317 PL_retstack_max = c->retstack_max;
281 PL_curcop = c->curcop; 318 PL_curcop = c->curcop;
282 PL_start_env = c->start_env;
283 PL_top_env = c->top_env; 319 PL_top_env = c->top_env;
284 320
285 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 321 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
286 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 322 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
287 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 323 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
… …
327 363
328 PUSHs (Nullsv); 364 PUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 365 /* this loop was inspired by pp_caller */
330 for (;;) 366 for (;;)
331 { 367 {
332 do 368 while (cxix >= 0)
333 { 369 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 370 PERL_CONTEXT *cx = &ccstk[cxix--];
335 371
336 if (CxTYPE(cx) == CXt_SUB) 372 if (CxTYPE(cx) == CXt_SUB)
337 { 373 {
… …
363 /* I never used formats, so how should I know how these are implemented? */ 399 /* I never used formats, so how should I know how these are implemented? */
364 /* my bold guess is as a simple, plain sub... */ 400 /* my bold guess is as a simple, plain sub... */
365 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 401 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
366 } 402 }
367 } 403 }
368 while (cxix >= 0);
369 404
370 if (top_si->si_type == PERLSI_MAIN) 405 if (top_si->si_type == PERLSI_MAIN)
371 break; 406 break;
372 407
373 top_si = top_si->si_prev; 408 top_si = top_si->si_prev;
… …
380 415
381 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 416 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
382 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 417 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
383 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 418 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
384 419
385 /* I have not the slightest idea of why av_reify is necessary */
386 /* but if it's missing the defav contents magically get replaced sometimes */
387 if (c->defav)
388 av_reify (c->defav);
389
390 c->dowarn = PL_dowarn; 420 c->dowarn = PL_dowarn;
421 c->in_eval = PL_in_eval;
391 422
392 c->curstackinfo = PL_curstackinfo; 423 c->curstackinfo = PL_curstackinfo;
393 c->curstack = PL_curstack; 424 c->curstack = PL_curstack;
394 c->mainstack = PL_mainstack; 425 c->mainstack = PL_mainstack;
395 c->stack_sp = PL_stack_sp; 426 c->stack_sp = PL_stack_sp;
396 c->op = PL_op; 427 c->op = PL_op;
397 c->curpad = PL_curpad; 428 c->curpad = PL_curpad;
429 c->comppad = PL_comppad;
398 c->stack_base = PL_stack_base; 430 c->stack_base = PL_stack_base;
399 c->stack_max = PL_stack_max; 431 c->stack_max = PL_stack_max;
400 c->tmps_stack = PL_tmps_stack; 432 c->tmps_stack = PL_tmps_stack;
401 c->tmps_floor = PL_tmps_floor; 433 c->tmps_floor = PL_tmps_floor;
402 c->tmps_ix = PL_tmps_ix; 434 c->tmps_ix = PL_tmps_ix;
… …
412 c->savestack_max = PL_savestack_max; 444 c->savestack_max = PL_savestack_max;
413 c->retstack = PL_retstack; 445 c->retstack = PL_retstack;
414 c->retstack_ix = PL_retstack_ix; 446 c->retstack_ix = PL_retstack_ix;
415 c->retstack_max = PL_retstack_max; 447 c->retstack_max = PL_retstack_max;
416 c->curcop = PL_curcop; 448 c->curcop = PL_curcop;
417 c->start_env = PL_start_env;
418 c->top_env = PL_top_env; 449 c->top_env = PL_top_env;
419} 450}
420 451
421/* 452/*
422 * allocate various perl stacks. This is an exact copy 453 * allocate various perl stacks. This is an exact copy
… …
434 465
435 PL_stack_base = AvARRAY(PL_curstack); 466 PL_stack_base = AvARRAY(PL_curstack);
436 PL_stack_sp = PL_stack_base; 467 PL_stack_sp = PL_stack_base;
437 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 468 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438 469
439 New(50,PL_tmps_stack,64,SV*); 470 New(50,PL_tmps_stack,96,SV*);
440 PL_tmps_floor = -1; 471 PL_tmps_floor = -1;
441 PL_tmps_ix = -1; 472 PL_tmps_ix = -1;
442 PL_tmps_max = 64; 473 PL_tmps_max = 96;
443 474
444 New(54,PL_markstack,12,I32); 475 New(54,PL_markstack,16,I32);
445 PL_markstack_ptr = PL_markstack; 476 PL_markstack_ptr = PL_markstack;
446 PL_markstack_max = PL_markstack + 12; 477 PL_markstack_max = PL_markstack + 16;
447 478
448 SET_MARK_OFFSET; 479 SET_MARK_OFFSET;
449 480
450 New(54,PL_scopestack,12,I32); 481 New(54,PL_scopestack,16,I32);
451 PL_scopestack_ix = 0; 482 PL_scopestack_ix = 0;
452 PL_scopestack_max = 12; 483 PL_scopestack_max = 16;
453 484
454 New(54,PL_savestack,64,ANY); 485 New(54,PL_savestack,96,ANY);
455 PL_savestack_ix = 0; 486 PL_savestack_ix = 0;
456 PL_savestack_max = 64; 487 PL_savestack_max = 96;
457 488
458 New(54,PL_retstack,8,OP*); 489 New(54,PL_retstack,8,OP*);
459 PL_retstack_ix = 0; 490 PL_retstack_ix = 0;
460 PL_retstack_max = 8; 491 PL_retstack_max = 8;
461} 492}
… …
465 * still there is a memleak of 128 bytes... 496 * still there is a memleak of 128 bytes...
466 */ 497 */
467STATIC void 498STATIC void
468destroy_stacks(pTHX) 499destroy_stacks(pTHX)
469{ 500{
501 if (!IN_DESTRUCT)
502 {
470 /* is this ugly, I ask? */ 503 /* is this ugly, I ask? */
471 while (PL_scopestack_ix) 504 while (PL_scopestack_ix)
472 LEAVE; 505 LEAVE;
473 506
474 /* sure it is, but more important: is it correct?? :/ */ 507 /* sure it is, but more important: is it correct?? :/ */
475 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */ 508 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
476 FREETMPS; 509 FREETMPS;
510 }
477 511
478 while (PL_curstackinfo->si_next) 512 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 513 PL_curstackinfo = PL_curstackinfo->si_next;
480 514
481 while (PL_curstackinfo) 515 while (PL_curstackinfo)
… …
486 dSP; 520 dSP;
487 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 521 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488 PUTBACK; /* possibly superfluous */ 522 PUTBACK; /* possibly superfluous */
489 } 523 }
490 524
525 if (!IN_DESTRUCT)
526 {
491 dounwind(-1); 527 dounwind(-1);
492
493 SvREFCNT_dec(PL_curstackinfo->si_stack); 528 SvREFCNT_dec(PL_curstackinfo->si_stack);
529 }
530
494 Safefree(PL_curstackinfo->si_cxstack); 531 Safefree(PL_curstackinfo->si_cxstack);
495 Safefree(PL_curstackinfo); 532 Safefree(PL_curstackinfo);
496 PL_curstackinfo = p; 533 PL_curstackinfo = p;
497 } 534 }
498 535
… …
502 Safefree(PL_savestack); 539 Safefree(PL_savestack);
503 Safefree(PL_retstack); 540 Safefree(PL_retstack);
504} 541}
505 542
506static void 543static void
507allocate_stack (Coro__State ctx) 544allocate_stack (Coro__State ctx, int alloc)
508{ 545{
546 coro_stack *stack;
547
548 New (0, stack, 1, coro_stack);
549
550 stack->refcnt = 1;
551 stack->usecnt = 1;
552 stack->gencnt = ctx->gencnt = 0;
553 if (alloc)
554 {
509#ifdef HAVE_MMAP 555#if HAVE_MMAP
510 ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */ 556 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
511 ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); 557 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
512 if (ctx->sptr == (void *)-1) 558 if (stack->sptr == (void *)-1)
513#endif 559#endif
514 { 560 {
515 /*FIXME*//*D*//* reasonable stack size! */ 561 /*FIXME*//*D*//* reasonable stack size! */
516 ctx->ssize = 4096 * sizeof (long); 562 stack->ssize = -4096 * sizeof (long);
517 New (0, ctx->sptr, 4096, long); 563 New (0, stack->sptr, 4096, long);
564 }
518 } 565 }
566 else
567 stack->sptr = 0;
568
569 ctx->stack = stack;
519} 570}
520 571
521static void 572static void
522deallocate_stack (Coro__State ctx) 573deallocate_stack (Coro__State ctx)
523{ 574{
575 coro_stack *stack = ctx->stack;
576
577 ctx->stack = 0;
578
579 if (stack)
580 {
581 if (!--stack->refcnt)
582 {
524#ifdef HAVE_MMAP 583#ifdef HAVE_MMAP
525 munmap (ctx->sptr, ctx->ssize); 584 if (stack->ssize > 0 && stack->sptr)
585 munmap (stack->sptr, stack->ssize);
586 else
526#else 587#else
527 Safefree (ctx->sptr); 588 Safefree (stack->sptr);
528#endif 589#endif
590 Safefree (stack);
591 }
592 else if (ctx->gencnt == stack->gencnt)
593 --stack->usecnt;
594 }
529} 595}
530 596
531/* might go away together with optional SAVE_CCTXT */
532static void 597static void
533setup_coro (void *arg) 598setup_coro (void *arg)
534{ 599{
535 /* 600 /*
536 * emulate part of the perl startup here. 601 * emulate part of the perl startup here.
… …
538 dSP; 603 dSP;
539 Coro__State ctx = (Coro__State)arg; 604 Coro__State ctx = (Coro__State)arg;
540 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE); 605 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
541 606
542 coro_init_stacks (aTHX); 607 coro_init_stacks (aTHX);
543 JMPENV_BOOTSTRAP;
544 SPAGAIN;
545
546 /*PL_curcop = 0;*/ 608 /*PL_curcop = 0;*/
609 /*PL_in_eval = PL_in_eval;*/ /* inherit */
547 SvREFCNT_dec (GvAV (PL_defgv)); 610 SvREFCNT_dec (GvAV (PL_defgv));
548 GvAV (PL_defgv) = ctx->args; 611 GvAV (PL_defgv) = ctx->args;
549 612
613 SPAGAIN;
614
550 if (ctx->sptr) 615 if (ctx->stack)
551 { 616 {
617 ctx->cursp = 0;
618
552 PUSHMARK(SP); 619 PUSHMARK(SP);
553 PUTBACK; 620 PUTBACK;
554 (void) call_sv (sub_init, G_VOID|G_NOARGS); 621 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623 if (SvTRUE (ERRSV))
624 croak (NULL);
625 else
555 croak ("FATAL: CCTXT coroutine returned!"); 626 croak ("FATAL: CCTXT coroutine returned!");
556 } 627 }
557 else 628 else
558 { 629 {
559 UNOP myop; 630 UNOP myop;
560 631
… …
572 * that doesn't matter, though, since it is only 643 * that doesn't matter, though, since it is only
573 * pp_nextstate and we never return... 644 * pp_nextstate and we never return...
574 * ah yes, and I don't care anyways ;) 645 * ah yes, and I don't care anyways ;)
575 */ 646 */
576 PUTBACK; 647 PUTBACK;
577 PL_op = pp_entersub(); 648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
578 SPAGAIN; 649 SPAGAIN;
579 650
580 ENTER; /* necessary e.g. for dounwind */ 651 ENTER; /* necessary e.g. for dounwind */
581 } 652 }
653}
654
655static void
656continue_coro (void *arg)
657{
658 /*
659 * this is a _very_ stripped down perl interpreter ;)
660 */
661 Coro__State ctx = (Coro__State)arg;
662 JMPENV coro_start_env;
663
664 PL_top_env = &ctx->start_env;
665
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
582} 671}
583 672
584STATIC void 673STATIC void
585transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 674transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
586{ 675{
587 dSP; 676 dSTACKLEVEL;
677 static struct coro *xnext;
588 678
589 if (prev != next) 679 if (prev != next)
590 { 680 {
591 /* 681 xnext = next;
592 * this could be done in newprocess which would lead to 682
593 * extremely elegant and fast (basically just SAVE/LOAD)
594 * code here, but lazy allocation of stacks has also
595 * some virtues and the overhead of the if() is nil.
596 */
597 if (next->mainstack) 683 if (next->mainstack)
598 { 684 {
599 SAVE (prev, flags); 685 SAVE (prev, flags);
600 LOAD (next); 686 LOAD (next);
601 687
602 /* mark this state as in-use */ 688 /* mark this state as in-use */
603 next->mainstack = 0; 689 next->mainstack = 0;
604 next->tmps_ix = -2; 690 next->tmps_ix = -2;
605 691
692 /* stacklevel changed? if yes, grab the stack for us! */
606 if (flags & TRANSFER_SAVE_CCTXT) 693 if (flags & TRANSFER_SAVE_CCTXT)
607 { 694 {
608 if (!next->ssize)
609 croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611 if (!prev->ssize) 695 if (!prev->stack)
612 prev->ssize = 1; /* mark cctx as valid ;) */ 696 allocate_stack (prev, 0);
697 else if (prev->cursp != stacklevel
698 && prev->stack->usecnt > 1)
699 {
700 prev->gencnt = ++prev->stack->gencnt;
701 prev->stack->usecnt = 1;
702 }
613 703
704 /* has our stack been invalidated? */
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 {
707 deallocate_stack (next);
708 allocate_stack (next, 1);
709 coro_create (&(next->stack->cctx),
710 continue_coro, (void *)next,
711 next->stack->sptr, labs (next->stack->ssize));
712 }
713
614 coro_transfer (&(prev->cctx), &(next->cctx)); 714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715 /* don't add any code here */
615 } 716 }
616 717
617 } 718 }
618 else if (next->tmps_ix == -2) 719 else if (next->tmps_ix == -2)
619 croak ("tried to transfer to running coroutine"); 720 croak ("tried to transfer to running coroutine");
… …
621 { 722 {
622 SAVE (prev, -1); /* first get rid of the old state */ 723 SAVE (prev, -1); /* first get rid of the old state */
623 724
624 if (flags & TRANSFER_SAVE_CCTXT) 725 if (flags & TRANSFER_SAVE_CCTXT)
625 { 726 {
626 if (!next->ssize) 727 if (!prev->stack)
728 allocate_stack (prev, 0);
729
730 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
627 { 731 {
732 PL_top_env = &next->start_env;
733
734 setup_coro (next);
735
736 prev->stack->refcnt++;
737 prev->stack->usecnt++;
738 next->stack = prev->stack;
739 next->gencnt = prev->gencnt;
740 }
741 else
742 {
628 allocate_stack (next); 743 allocate_stack (next, 1);
629 coro_create (&(next->cctx), 744 coro_create (&(next->stack->cctx),
630 setup_coro, (void *)next, 745 setup_coro, (void *)next,
631 next->sptr, next->ssize); 746 next->stack->sptr, labs (next->stack->ssize));
747 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748 /* don't add any code here */
632 } 749 }
633
634 if (!prev->ssize)
635 prev->ssize = 1; /* mark cctx as valid ;) */
636
637 coro_transfer (&(prev->cctx), &(next->cctx));
638 } 750 }
639 else 751 else
640 setup_coro (next); 752 setup_coro (next);
641 } 753 }
754
755 /*
756 * xnext is now either prev or next, depending on wether
757 * we switched the c stack or not. that's why I use a global
758 * variable, that should become thread-specific at one point.
759 */
760 xnext->cursp = stacklevel;
761 }
762
763 if (coro_mortal)
764 {
765 SvREFCNT_dec (coro_mortal);
766 coro_mortal = 0;
767 }
768}
769
770#define SV_CORO(sv,func) \
771 do { \
772 if (SvROK (sv)) \
773 sv = SvRV (sv); \
774 \
775 if (SvTYPE(sv) == SVt_PVHV) \
776 { \
777 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
778 \
779 if (!he) \
780 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
781 \
782 (sv) = SvRV (HeVAL(he)); \
783 } \
784 \
785 /* must also be changed inside Coro::Cont::yield */ \
786 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
787 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
788 \
789 } while(0)
790
791#define SvSTATE(sv) (struct coro *)SvIV (sv)
792
793static void
794api_transfer(pTHX_ SV *prev, SV *next, int flags)
795{
796 SV_CORO (prev, "Coro::transfer");
797 SV_CORO (next, "Coro::transfer");
798
799 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
800}
801
802/** Coro ********************************************************************/
803
804#define PRIO_MAX 3
805#define PRIO_HIGH 1
806#define PRIO_NORMAL 0
807#define PRIO_LOW -1
808#define PRIO_IDLE -3
809#define PRIO_MIN -4
810
811/* for Coro.pm */
812static GV *coro_current, *coro_idle;
813static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
814static int coro_nready;
815
816static void
817coro_enq (SV *sv)
818{
819 if (SvTYPE (sv) == SVt_PVHV)
820 {
821 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
822 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
823
824 prio = prio > PRIO_MAX ? PRIO_MAX
825 : prio < PRIO_MIN ? PRIO_MIN
826 : prio;
827
828 av_push (coro_ready [prio - PRIO_MIN], sv);
829 coro_nready++;
830
831 return;
832 }
833
834 croak ("Coro::ready tried to enqueue something that is not a coroutine");
835}
836
837static SV *
838coro_deq (int min_prio)
839{
840 int prio = PRIO_MAX - PRIO_MIN;
841
842 min_prio -= PRIO_MIN;
843 if (min_prio < 0)
844 min_prio = 0;
845
846 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
847 if (av_len (coro_ready[prio]) >= 0)
848 {
849 coro_nready--;
850 return av_shift (coro_ready[prio]);
642 } 851 }
852
853 return 0;
854}
855
856static void
857api_ready (SV *coro)
858{
859 if (SvROK (coro))
860 coro = SvRV (coro);
861
862 coro_enq (SvREFCNT_inc (coro));
863}
864
865static void
866api_schedule (void)
867{
868 SV *prev, *next;
869
870 prev = SvRV (GvSV (coro_current));
871 next = coro_deq (PRIO_MIN);
872
873 if (!next)
874 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
875
876 /* free this only after the transfer */
877 coro_mortal = prev;
878 SV_CORO (prev, "Coro::schedule");
879
880 SvRV (GvSV (coro_current)) = next;
881
882 SV_CORO (next, "Coro::schedule");
883
884 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
885 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
886}
887
888static void
889api_cede (void)
890{
891 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
892
893 api_schedule ();
643} 894}
644 895
645MODULE = Coro::State PACKAGE = Coro::State 896MODULE = Coro::State PACKAGE = Coro::State
646 897
647PROTOTYPES: ENABLE 898PROTOTYPES: ENABLE
648 899
649BOOT: 900BOOT:
650{ /* {} necessary for stoopid perl-5.6.x */ 901{ /* {} necessary for stoopid perl-5.6.x */
902 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
903 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
651 coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE); 904 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652 905
653 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 906 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
654 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 907 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
655 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 908 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
656 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 909 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
657 910
658 if (!padlist_cache) 911 if (!padlist_cache)
659 padlist_cache = newHV (); 912 padlist_cache = newHV ();
660 913
661 main_mainstack = PL_mainstack; 914 main_mainstack = PL_mainstack;
915
916 coroapi.ver = CORO_API_VERSION;
917 coroapi.transfer = api_transfer;
662} 918}
663 919
664Coro::State 920Coro::State
665_newprocess(args) 921_newprocess(args)
666 SV * args 922 SV * args
… …
673 929
674 New (0, coro, 1, struct coro); 930 New (0, coro, 1, struct coro);
675 931
676 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 932 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
677 coro->mainstack = 0; /* actual work is done inside transfer */ 933 coro->mainstack = 0; /* actual work is done inside transfer */
678 coro->sptr = 0; 934 coro->stack = 0;
679 coro->ssize = 0; 935
936 /* same as JMPENV_BOOTSTRAP */
937 /* we might be able to recycle start_env, but safe is safe */
938 Zero(&coro->start_env, 1, JMPENV);
939 coro->start_env.je_ret = -1;
940 coro->start_env.je_mustcatch = TRUE;
680 941
681 RETVAL = coro; 942 RETVAL = coro;
682 OUTPUT: 943 OUTPUT:
683 RETVAL 944 RETVAL
684 945
685void 946void
686transfer(prev, next, flags = TRANSFER_SAVE_ALL) 947transfer(prev, next, flags)
687 Coro::State_or_hashref prev 948 SV *prev
688 Coro::State_or_hashref next 949 SV *next
689 int flags 950 int flags
690 PROTOTYPE: @ 951 PROTOTYPE: @
691 CODE: 952 CODE:
953 PUTBACK;
954 SV_CORO (next, "Coro::transfer");
955 SV_CORO (prev, "Coro::transfer");
692 transfer (aTHX_ prev, next, flags); 956 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
957 SPAGAIN;
693 958
694void 959void
695DESTROY(coro) 960DESTROY(coro)
696 Coro::State coro 961 Coro::State coro
697 CODE: 962 CODE:
698 963
699 if (coro->mainstack && coro->mainstack != main_mainstack) 964 if (coro->mainstack && coro->mainstack != main_mainstack)
700 { 965 {
701 struct coro temp; 966 struct coro temp;
702 967
968 PUTBACK;
703 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 969 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
704 LOAD(aTHX_ coro); 970 LOAD(aTHX_ coro);
971 SPAGAIN;
705 972
706 destroy_stacks (aTHX); 973 destroy_stacks (aTHX);
707 974
708 LOAD((&temp)); /* this will get rid of defsv etc.. */ 975 LOAD((&temp)); /* this will get rid of defsv etc.. */
976 SPAGAIN;
709 977
710 coro->mainstack = 0; 978 coro->mainstack = 0;
711 } 979 }
712 980
713 if (coro->sptr)
714 {
715 deallocate_stack (coro); 981 deallocate_stack (coro);
716 coro->sptr = 0;
717 }
718 982
719 Safefree (coro); 983 Safefree (coro);
720 984
721void 985void
722flush() 986flush()
723 CODE: 987 CODE:
724#ifdef MAY_FLUSH 988#ifdef MAY_FLUSH
725 flush_padlist_cache (); 989 flush_padlist_cache ();
726#endif 990#endif
727 991
992void
993_exit(code)
994 int code
995 PROTOTYPE: $
996 CODE:
997#if defined(__GLIBC__) || _POSIX_C_SOURCE
998 _exit (code);
999#else
1000 signal (SIGTERM, SIG_DFL);
1001 raise (SIGTERM);
1002 exit (code);
1003#endif
1004
728MODULE = Coro::State PACKAGE = Coro::Cont 1005MODULE = Coro::State PACKAGE = Coro::Cont
729 1006
730# this is slightly dirty 1007# this is slightly dirty (should expose a c-level api)
731 1008
732void 1009void
733yield(...) 1010yield(...)
734 PROTOTYPE: @ 1011 PROTOTYPE: @
735 CODE: 1012 CODE:
… …
753 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 1030 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
754 SvREFCNT_dec (sv); 1031 SvREFCNT_dec (sv);
755 1032
756 transfer(aTHX_ prev, next, 0); 1033 transfer(aTHX_ prev, next, 0);
757 1034
1035MODULE = Coro::State PACKAGE = Coro
1036
1037# this is slightly dirty (should expose a c-level api)
1038
1039BOOT:
1040{
1041 int i;
1042 HV *stash = gv_stashpv ("Coro", TRUE);
1043
1044 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053
1054 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055 coro_ready[i] = newAV ();
1056
1057 {
1058 SV *sv = perl_get_sv("Coro::API", 1);
1059
1060 coroapi.schedule = api_schedule;
1061 coroapi.cede = api_cede;
1062 coroapi.ready = api_ready;
1063 coroapi.nready = &coro_nready;
1064 coroapi.current = coro_current;
1065
1066 GCoroAPI = &coroapi;
1067 sv_setiv(sv, (IV)&coroapi);
1068 SvREADONLY_on(sv);
1069 }
1070}
1071
1072void
1073ready(self)
1074 SV * self
1075 PROTOTYPE: $
1076 CODE:
1077 api_ready (self);
1078
1079int
1080nready(...)
1081 PROTOTYPE:
1082 CODE:
1083 RETVAL = coro_nready;
1084 OUTPUT:
1085 RETVAL
1086
1087void
1088schedule(...)
1089 PROTOTYPE:
1090 CODE:
1091 api_schedule ();
1092
1093void
1094cede(...)
1095 PROTOTYPE:
1096 CODE:
1097 api_cede ();
1098

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