[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.36 by root, Fri Oct 5 14:20:10 2001 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
		37	static struct CoroAPI coroapi;
		38
		39	/* this is actually not only the c stack but also c registers etc... */
		40	typedef 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
23	struct coro {	51	struct coro {
24	/* the optional C context */	52	/* the optional C context */
25	coro_context cctx;	53	coro_stack *stack;
26	void *sptr;	54	void *cursp;
27	long ssize;	55	int gencnt;
28		56
29	/* optionally saved, might be zero */	57	/* optionally saved, might be zero */
30	AV *defav;	58	AV *defav;
31	SV *defsv;	59	SV *defsv;
32	SV *errsv;	60	SV *errsv;
33		61
34	/* saved global state not related to stacks */	62	/* saved global state not related to stacks */
35	U8 dowarn;	63	U8 dowarn;
		64	I32 in_eval;
36		65
37	/* the stacks and related info (callchain etc..) */	66	/* the stacks and related info (callchain etc..) */
38	PERL_SI *curstackinfo;	67	PERL_SI *curstackinfo;
39	AV *curstack;	68	AV *curstack;
40	AV *mainstack;	69	AV *mainstack;
…		…
58	I32 savestack_max;	87	I32 savestack_max;
59	OP **retstack;	88	OP **retstack;
60	I32 retstack_ix;	89	I32 retstack_ix;
61	I32 retstack_max;	90	I32 retstack_max;
62	COP *curcop;	91	COP *curcop;
63	JMPENV start_env;
64	JMPENV *top_env;	92	JMPENV *top_env;
65		93
66	/* data associated with this coroutine (initial args) */	94	/* data associated with this coroutine (initial args) */
67	AV *args;	95	AV *args;
68	};	96	};
…		…
70	typedef struct coro *Coro__State;	98	typedef struct coro *Coro__State;
71	typedef struct coro *Coro__State_or_hashref;	99	typedef struct coro *Coro__State_or_hashref;
72		100
73	static AV main_mainstack; / used to differentiate between $main and others */	101	static AV main_mainstack; / used to differentiate between $main and others */
74	static HV *coro_state_stash;	102	static HV *coro_state_stash;
		103	static SV *ucoro_state_sv;
		104	static U32 ucoro_state_hash;
75	static HV *padlist_cache;	105	static HV *padlist_cache;
76		106
77	/* mostly copied from op.c:cv_clone2 */	107	/* mostly copied from op.c:cv_clone2 */
78	STATIC AV *	108	STATIC AV *
79	clone_padlist (AV *protopadlist)	109	clone_padlist (AV *protopadlist)
…		…
167		197
168	return newpadlist;	198	return newpadlist;
169	}	199	}
170		200
171	#ifdef MAY_FLUSH	201	#ifdef MAY_FLUSH
172	STATIC AV *	202	STATIC void
173	free_padlist (AV *padlist)	203	free_padlist (AV *padlist)
174	{	204	{
175	/* may be during global destruction */	205	/* may be during global destruction */
176	if (SvREFCNT(padlist))	206	if (SvREFCNT(padlist))
177	{	207	{
…		…
242	#endif	272	#endif
243		273
244	#define SB do {	274	#define SB do {
245	#define SE } while (0)	275	#define SE } while (0)
246		276
247	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	277	#define LOAD(state) load_state(aTHX_ (state));
248	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
249		279
250	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	280	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
251		281
252	static void	282	static void
253	load_state(pTHX_ Coro__State c)	283	load_state(pTHX_ Coro__State c)
254	{	284	{
255	PL_dowarn = c->dowarn;	285	PL_dowarn = c->dowarn;
		286	PL_in_eval = c->in_eval;
256		287
257	PL_curstackinfo = c->curstackinfo;	288	PL_curstackinfo = c->curstackinfo;
258	PL_curstack = c->curstack;	289	PL_curstack = c->curstack;
259	PL_mainstack = c->mainstack;	290	PL_mainstack = c->mainstack;
260	PL_stack_sp = c->stack_sp;	291	PL_stack_sp = c->stack_sp;
…		…
277	PL_savestack_max = c->savestack_max;	308	PL_savestack_max = c->savestack_max;
278	PL_retstack = c->retstack;	309	PL_retstack = c->retstack;
279	PL_retstack_ix = c->retstack_ix;	310	PL_retstack_ix = c->retstack_ix;
280	PL_retstack_max = c->retstack_max;	311	PL_retstack_max = c->retstack_max;
281	PL_curcop = c->curcop;	312	PL_curcop = c->curcop;
282	PL_start_env = c->start_env;
283	PL_top_env = c->top_env;	313	PL_top_env = c->top_env;
284		314
285	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
286	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
287	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
327		357
328	PUSHs (Nullsv);	358	PUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	359	/* this loop was inspired by pp_caller */
330	for (;;)	360	for (;;)
331	{	361	{
332	do	362	while (cxix >= 0)
333	{	363	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	364	PERL_CONTEXT *cx = &ccstk[cxix--];
335		365
336	if (CxTYPE(cx) == CXt_SUB)	366	if (CxTYPE(cx) == CXt_SUB)
337	{	367	{
…		…
363	/* I never used formats, so how should I know how these are implemented? */	393	/* I never used formats, so how should I know how these are implemented? */
364	/* my bold guess is as a simple, plain sub... */	394	/* my bold guess is as a simple, plain sub... */
365	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	395	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
366	}	396	}
367	}	397	}
368	while (cxix >= 0);
369		398
370	if (top_si->si_type == PERLSI_MAIN)	399	if (top_si->si_type == PERLSI_MAIN)
371	break;	400	break;
372		401
373	top_si = top_si->si_prev;	402	top_si = top_si->si_prev;
…		…
380		409
381	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	410	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
382	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	411	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
383	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	412	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
384		413
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;	414	c->dowarn = PL_dowarn;
		415	c->in_eval = PL_in_eval;
391		416
392	c->curstackinfo = PL_curstackinfo;	417	c->curstackinfo = PL_curstackinfo;
393	c->curstack = PL_curstack;	418	c->curstack = PL_curstack;
394	c->mainstack = PL_mainstack;	419	c->mainstack = PL_mainstack;
395	c->stack_sp = PL_stack_sp;	420	c->stack_sp = PL_stack_sp;
…		…
412	c->savestack_max = PL_savestack_max;	437	c->savestack_max = PL_savestack_max;
413	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
414	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
415	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
416	c->curcop = PL_curcop;	441	c->curcop = PL_curcop;
417	c->start_env = PL_start_env;
418	c->top_env = PL_top_env;	442	c->top_env = PL_top_env;
419	}	443	}
420		444
421	/*	445	/*
422	* allocate various perl stacks. This is an exact copy	446	* allocate various perl stacks. This is an exact copy
…		…
434		458
435	PL_stack_base = AvARRAY(PL_curstack);	459	PL_stack_base = AvARRAY(PL_curstack);
436	PL_stack_sp = PL_stack_base;	460	PL_stack_sp = PL_stack_base;
437	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	461	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438		462
439	New(50,PL_tmps_stack,64,SV*);	463	New(50,PL_tmps_stack,96,SV*);
440	PL_tmps_floor = -1;	464	PL_tmps_floor = -1;
441	PL_tmps_ix = -1;	465	PL_tmps_ix = -1;
442	PL_tmps_max = 64;	466	PL_tmps_max = 96;
443		467
444	New(54,PL_markstack,12,I32);	468	New(54,PL_markstack,16,I32);
445	PL_markstack_ptr = PL_markstack;	469	PL_markstack_ptr = PL_markstack;
446	PL_markstack_max = PL_markstack + 12;	470	PL_markstack_max = PL_markstack + 16;
447		471
448	SET_MARK_OFFSET;	472	SET_MARK_OFFSET;
449		473
450	New(54,PL_scopestack,12,I32);	474	New(54,PL_scopestack,16,I32);
451	PL_scopestack_ix = 0;	475	PL_scopestack_ix = 0;
452	PL_scopestack_max = 12;	476	PL_scopestack_max = 16;
453		477
454	New(54,PL_savestack,64,ANY);	478	New(54,PL_savestack,96,ANY);
455	PL_savestack_ix = 0;	479	PL_savestack_ix = 0;
456	PL_savestack_max = 64;	480	PL_savestack_max = 96;
457		481
458	New(54,PL_retstack,8,OP*);	482	New(54,PL_retstack,8,OP*);
459	PL_retstack_ix = 0;	483	PL_retstack_ix = 0;
460	PL_retstack_max = 8;	484	PL_retstack_max = 8;
461	}	485	}
…		…
465	* still there is a memleak of 128 bytes...	489	* still there is a memleak of 128 bytes...
466	*/	490	*/
467	STATIC void	491	STATIC void
468	destroy_stacks(pTHX)	492	destroy_stacks(pTHX)
469	{	493	{
		494	if (!IN_DESTRUCT)
		495	{
470	/* is this ugly, I ask? */	496	/* is this ugly, I ask? */
471	while (PL_scopestack_ix)	497	while (PL_scopestack_ix)
472	LEAVE;	498	LEAVE;
473		499
474	/* sure it is, but more important: is it correct?? :/ */	500	/* sure it is, but more important: is it correct?? :/ */
475	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
476	FREETMPS;	502	FREETMPS;
		503	}
477		504
478	while (PL_curstackinfo->si_next)	505	while (PL_curstackinfo->si_next)
479	PL_curstackinfo = PL_curstackinfo->si_next;	506	PL_curstackinfo = PL_curstackinfo->si_next;
480		507
481	while (PL_curstackinfo)	508	while (PL_curstackinfo)
…		…
486	dSP;	513	dSP;
487	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488	PUTBACK; /* possibly superfluous */	515	PUTBACK; /* possibly superfluous */
489	}	516	}
490		517
		518	if (!IN_DESTRUCT)
		519	{
491	dounwind(-1);	520	dounwind(-1);
492
493	SvREFCNT_dec(PL_curstackinfo->si_stack);	521	SvREFCNT_dec(PL_curstackinfo->si_stack);
		522	}
		523
494	Safefree(PL_curstackinfo->si_cxstack);	524	Safefree(PL_curstackinfo->si_cxstack);
495	Safefree(PL_curstackinfo);	525	Safefree(PL_curstackinfo);
496	PL_curstackinfo = p;	526	PL_curstackinfo = p;
497	}	527	}
498		528
…		…
502	Safefree(PL_savestack);	532	Safefree(PL_savestack);
503	Safefree(PL_retstack);	533	Safefree(PL_retstack);
504	}	534	}
505		535
506	static void	536	static void
507	allocate_stack (Coro__State ctx)	537	allocate_stack (Coro__State ctx, int alloc)
508	{	538	{
		539	coro_stack *stack;
		540
		541	New (0, stack, 1, coro_stack);
		542
		543	stack->refcnt = 1;
		544	stack->usecnt = 1;
		545	stack->gencnt = ctx->gencnt = 0;
		546	if (alloc)
		547	{
509	#ifdef HAVE_MMAP	548	#ifdef HAVE_MMAP
510	ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */	549	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);	550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
512	if (ctx->sptr == (void *)-1)	551	if (stack->sptr == (void *)-1)
513	#endif	552	#endif
514	{	553	{
515	/FIXME//D//* reasonable stack size! */	554	/FIXME//D//* reasonable stack size! */
516	ctx->ssize = 4096 * sizeof (long);	555	stack->ssize = -4096 * sizeof (long);
517	New (0, ctx->sptr, 4096, long);	556	New (0, stack->sptr, 4096, long);
		557	}
518	}	558	}
		559	else
		560	stack->sptr = 0;
		561
		562	ctx->stack = stack;
519	}	563	}
520		564
521	static void	565	static void
522	deallocate_stack (Coro__State ctx)	566	deallocate_stack (Coro__State ctx)
523	{	567	{
		568	coro_stack *stack = ctx->stack;
		569
		570	ctx->stack = 0;
		571
		572	if (stack)
		573	{
		574	if (!--stack->refcnt)
		575	{
524	#ifdef HAVE_MMAP	576	#ifdef HAVE_MMAP
525	munmap (ctx->sptr, ctx->ssize);	577	if (stack->ssize > 0 && stack->sptr)
		578	munmap (stack->sptr, stack->ssize);
		579	else
526	#else	580	#else
527	Safefree (ctx->sptr);	581	Safefree (stack->sptr);
528	#endif	582	#endif
		583	Safefree (stack);
		584	}
		585	else if (ctx->gencnt == stack->gencnt)
		586	--stack->usecnt;
		587	}
529	}	588	}
530		589
531	/* might go away together with optional SAVE_CCTXT */
532	static void	590	static void
533	setup_coro (void *arg)	591	setup_coro (void *arg)
534	{	592	{
535	/*	593	/*
536	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
…		…
538	dSP;	596	dSP;
539	Coro__State ctx = (Coro__State)arg;	597	Coro__State ctx = (Coro__State)arg;
540	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	598	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
541		599
542	coro_init_stacks (aTHX);	600	coro_init_stacks (aTHX);
543	JMPENV_BOOTSTRAP;
544	SPAGAIN;
545
546	/PL_curcop = 0;/	601	/PL_curcop = 0;/
		602	/PL_in_eval = PL_in_eval;/ /* inherit */
547	SvREFCNT_dec (GvAV (PL_defgv));	603	SvREFCNT_dec (GvAV (PL_defgv));
548	GvAV (PL_defgv) = ctx->args;	604	GvAV (PL_defgv) = ctx->args;
549		605
		606	SPAGAIN;
		607
550	if (ctx->sptr)	608	if (ctx->stack)
551	{	609	{
		610	ctx->cursp = 0;
		611
552	PUSHMARK(SP);	612	PUSHMARK(SP);
553	PUTBACK;	613	PUTBACK;
554	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	614	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		615
		616	if (SvTRUE (ERRSV))
		617	croak (NULL);
		618	else
555	croak ("FATAL: CCTXT coroutine returned!");	619	croak ("FATAL: CCTXT coroutine returned!");
556	}	620	}
557	else	621	else
558	{	622	{
559	UNOP myop;	623	UNOP myop;
560		624
…		…
579		643
580	ENTER; /* necessary e.g. for dounwind */	644	ENTER; /* necessary e.g. for dounwind */
581	}	645	}
582	}	646	}
583		647
		648	static void
		649	continue_coro (void *arg)
		650	{
		651	/*
		652	* this is a _very_ stripped down perl interpreter ;)
		653	*/
		654	Coro__State ctx = (Coro__State)arg;
		655	JMPENV coro_start_env;
		656
		657	/* same as JMPENV_BOOTSTRAP */
		658	Zero(&coro_start_env, 1, JMPENV);
		659	coro_start_env.je_ret = -1;
		660	coro_start_env.je_mustcatch = TRUE;
		661	PL_top_env = &coro_start_env;
		662
		663	ctx->cursp = 0;
		664	PL_op = PL_op->op_next;
		665	CALLRUNOPS(aTHX);
		666
		667	abort ();
		668	}
		669
584	STATIC void	670	STATIC void
585	transfer(pTHX_ struct coro prev, struct coro next, int flags)	671	transfer(pTHX_ struct coro prev, struct coro next, int flags)
586	{	672	{
587	dSP;	673	dSTACKLEVEL;
		674	static struct coro *xnext;
588		675
589	if (prev != next)	676	if (prev != next)
590	{	677	{
591	/*	678	xnext = next;
592	* this could be done in newprocess which would lead to	679
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)	680	if (next->mainstack)
598	{	681	{
599	SAVE (prev, flags);	682	SAVE (prev, flags);
600	LOAD (next);	683	LOAD (next);
601		684
602	/* mark this state as in-use */	685	/* mark this state as in-use */
603	next->mainstack = 0;	686	next->mainstack = 0;
604	next->tmps_ix = -2;	687	next->tmps_ix = -2;
605		688
		689	/* stacklevel changed? if yes, grab the stack for us! */
606	if (flags & TRANSFER_SAVE_CCTXT)	690	if (flags & TRANSFER_SAVE_CCTXT)
607	{	691	{
608	if (!next->ssize)
609	croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611	if (!prev->ssize)	692	if (!prev->stack)
612	prev->ssize = 1; /* mark cctx as valid ;) */	693	allocate_stack (prev, 0);
		694	else if (prev->cursp != stacklevel
		695	&& prev->stack->usecnt > 1)
		696	{
		697	prev->gencnt = ++prev->stack->gencnt;
		698	prev->stack->usecnt = 1;
		699	}
613		700
		701	/* has our stack been invalidated? */
		702	if (next->stack && next->stack->gencnt != next->gencnt)
		703	{
		704	deallocate_stack (next);
		705	allocate_stack (next, 1);
		706	coro_create (&(next->stack->cctx),
		707	continue_coro, (void *)next,
		708	next->stack->sptr, labs (next->stack->ssize));
		709	}
		710
614	coro_transfer (&(prev->cctx), &(next->cctx));	711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		712	/* don't add any code here */
615	}	713	}
616		714
617	}	715	}
618	else if (next->tmps_ix == -2)	716	else if (next->tmps_ix == -2)
619	croak ("tried to transfer to running coroutine");	717	croak ("tried to transfer to running coroutine");
…		…
621	{	719	{
622	SAVE (prev, -1); /* first get rid of the old state */	720	SAVE (prev, -1); /* first get rid of the old state */
623		721
624	if (flags & TRANSFER_SAVE_CCTXT)	722	if (flags & TRANSFER_SAVE_CCTXT)
625	{	723	{
626	if (!next->ssize)	724	if (!prev->stack)
		725	allocate_stack (prev, 0);
		726
		727	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
627	{	728	{
		729	setup_coro (next);
		730
		731	prev->stack->refcnt++;
		732	prev->stack->usecnt++;
		733	next->stack = prev->stack;
		734	next->gencnt = prev->gencnt;
		735	}
		736	else
		737	{
628	allocate_stack (next);	738	allocate_stack (next, 1);
629	coro_create (&(next->cctx),	739	coro_create (&(next->stack->cctx),
630	setup_coro, (void *)next,	740	setup_coro, (void *)next,
631	next->sptr, next->ssize);	741	next->stack->sptr, labs (next->stack->ssize));
		742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		743	/* don't add any code here */
632	}	744	}
633
634	if (!prev->ssize)
635	prev->ssize = 1; /* mark cctx as valid ;) */
636
637	coro_transfer (&(prev->cctx), &(next->cctx));
638	}	745	}
639	else	746	else
640	setup_coro (next);	747	setup_coro (next);
641	}	748	}
		749
		750	/*
		751	* xnext is now either prev or next, depending on wether
		752	* we switched the c stack or not. that's why i use a global
		753	* variable, that should become thread-specific at one point.
		754	*/
		755	xnext->cursp = stacklevel;
		756	}
		757	}
		758
		759	static struct coro *
		760	sv_to_coro (SV arg, const char funcname, const char *varname)
		761	{
		762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
		763	{
		764	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
		765
		766	if (!he)
		767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
		768
		769	arg = HeVAL(he);
		770	}
		771
		772	/* must also be changed inside Coro::Cont::yield */
		773	if (SvROK(arg) && SvOBJECT(SvRV(arg))
		774	&& SvSTASH(SvRV(arg)) == coro_state_stash)
		775	return (struct coro ) SvIV((SV)SvRV(arg));
		776
		777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
		778	/NORETURN/
		779	}
		780
		781	static void
		782	api_transfer(pTHX_ SV prev, SV next, int flags)
		783	{
		784	transfer(aTHX_
		785	sv_to_coro (prev, "Coro::transfer", "prev"),
		786	sv_to_coro (next, "Coro::transfer", "next"),
		787	flags);
		788	}
		789
		790	/ Coro ******************************************************************/
		791
		792	#define PRIO_MAX 3
		793	#define PRIO_HIGH 1
		794	#define PRIO_NORMAL 0
		795	#define PRIO_LOW -1
		796	#define PRIO_IDLE -3
		797	#define PRIO_MIN -4
		798
		799	/* for Coro.pm */
		800	static GV coro_current, coro_idle;
		801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		802	static int coro_nready;
		803
		804	static void
		805	coro_enq (SV *sv)
		806	{
		807	if (SvROK (sv))
		808	{
		809	SV *hv = SvRV (sv);
		810	if (SvTYPE (hv) == SVt_PVHV)
		811	{
		812	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
		813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		814
		815	prio = prio > PRIO_MAX ? PRIO_MAX
		816	: prio < PRIO_MIN ? PRIO_MIN
		817	: prio;
		818
		819	av_push (coro_ready [prio - PRIO_MIN], sv);
		820	coro_nready++;
		821
		822	return;
		823	}
		824	}
		825
		826	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		827	}
		828
		829	static SV *
		830	coro_deq (int min_prio)
		831	{
		832	int prio = PRIO_MAX - PRIO_MIN;
		833
		834	min_prio -= PRIO_MIN;
		835	if (min_prio < 0)
		836	min_prio = 0;
		837
		838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		839	if (av_len (coro_ready[prio]) >= 0)
		840	{
		841	coro_nready--;
		842	return av_shift (coro_ready[prio]);
642	}	843	}
		844
		845	return 0;
		846	}
		847
		848	static void
		849	api_ready (SV *coro)
		850	{
		851	coro_enq (SvREFCNT_inc (coro));
		852	}
		853
		854	static void
		855	api_schedule (int cede)
		856	{
		857	SV prev, next;
		858
		859	prev = GvSV (coro_current);
		860
		861	if (cede)
		862	coro_enq (SvREFCNT_inc (prev));
		863
		864	next = coro_deq (PRIO_MIN);
		865
		866	if (!next)
		867	next = SvREFCNT_inc (GvSV (coro_idle));
		868
		869	GvSV (coro_current) = SvREFCNT_inc (next);
		870	transfer (aTHX_
		871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
		872	sv_to_coro (next, "Coro::schedule", "next coroutine"),
		873	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		874	SvREFCNT_dec (next);
		875	SvREFCNT_dec (prev);
643	}	876	}
644		877
645	MODULE = Coro::State PACKAGE = Coro::State	878	MODULE = Coro::State PACKAGE = Coro::State
646		879
647	PROTOTYPES: ENABLE	880	PROTOTYPES: ENABLE
648		881
649	BOOT:	882	BOOT:
650	{ /* {} necessary for stoopid perl-5.6.x */	883	{ /* {} necessary for stoopid perl-5.6.x */
		884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
651	coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE);	886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652		887
653	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
654	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
655	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
656	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
657		892
658	if (!padlist_cache)	893	if (!padlist_cache)
659	padlist_cache = newHV ();	894	padlist_cache = newHV ();
660		895
661	main_mainstack = PL_mainstack;	896	main_mainstack = PL_mainstack;
		897
		898	coroapi.ver = CORO_API_VERSION;
		899	coroapi.transfer = api_transfer;
662	}	900	}
663		901
664	Coro::State	902	Coro::State
665	_newprocess(args)	903	_newprocess(args)
666	SV * args	904	SV * args
…		…
673		911
674	New (0, coro, 1, struct coro);	912	New (0, coro, 1, struct coro);
675		913
676	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
677	coro->mainstack = 0; /* actual work is done inside transfer */	915	coro->mainstack = 0; /* actual work is done inside transfer */
678	coro->sptr = 0;	916	coro->stack = 0;
679	coro->ssize = 0;
680		917
681	RETVAL = coro;	918	RETVAL = coro;
682	OUTPUT:	919	OUTPUT:
683	RETVAL	920	RETVAL
684		921
685	void	922	void
686	transfer(prev, next, flags = TRANSFER_SAVE_ALL)	923	transfer(prev, next, flags)
687	Coro::State_or_hashref prev	924	Coro::State_or_hashref prev
688	Coro::State_or_hashref next	925	Coro::State_or_hashref next
689	int flags	926	int flags
690	PROTOTYPE: @	927	PROTOTYPE: @
691	CODE:	928	CODE:
		929	PUTBACK;
692	transfer (aTHX_ prev, next, flags);	930	transfer (aTHX_ prev, next, flags);
		931	SPAGAIN;
693		932
694	void	933	void
695	DESTROY(coro)	934	DESTROY(coro)
696	Coro::State coro	935	Coro::State coro
697	CODE:	936	CODE:
698		937
699	if (coro->mainstack && coro->mainstack != main_mainstack)	938	if (coro->mainstack && coro->mainstack != main_mainstack)
700	{	939	{
701	struct coro temp;	940	struct coro temp;
702		941
		942	PUTBACK;
703	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
704	LOAD(aTHX_ coro);	944	LOAD(aTHX_ coro);
		945	SPAGAIN;
705		946
706	destroy_stacks (aTHX);	947	destroy_stacks (aTHX);
707		948
708	LOAD((&temp)); /* this will get rid of defsv etc.. */	949	LOAD((&temp)); /* this will get rid of defsv etc.. */
		950	SPAGAIN;
709		951
710	coro->mainstack = 0;	952	coro->mainstack = 0;
711	}	953	}
712		954
713	if (coro->sptr)
714	{
715	deallocate_stack (coro);	955	deallocate_stack (coro);
716	coro->sptr = 0;
717	}
718		956
719	Safefree (coro);	957	Safefree (coro);
720		958
721	void	959	void
722	flush()	960	flush()
723	CODE:	961	CODE:
724	#ifdef MAY_FLUSH	962	#ifdef MAY_FLUSH
725	flush_padlist_cache ();	963	flush_padlist_cache ();
726	#endif	964	#endif
727		965
		966	void
		967	_exit(code)
		968	int code
		969	PROTOTYPE: $
		970	CODE:
		971	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		972	_exit (code);
		973	#else
		974	signal (SIGTERM, SIG_DFL);
		975	raise (SIGTERM);
		976	exit (code);
		977	#endif
		978
728	MODULE = Coro::State PACKAGE = Coro::Cont	979	MODULE = Coro::State PACKAGE = Coro::Cont
729		980
730	# this is slightly dirty	981	# this is slightly dirty (should expose a c-level api)
731		982
732	void	983	void
733	yield(...)	984	yield(...)
734	PROTOTYPE: @	985	PROTOTYPE: @
735	CODE:	986	CODE:
…		…
753	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1004	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
754	SvREFCNT_dec (sv);	1005	SvREFCNT_dec (sv);
755		1006
756	transfer(aTHX_ prev, next, 0);	1007	transfer(aTHX_ prev, next, 0);
757		1008
		1009	MODULE = Coro::State PACKAGE = Coro
		1010
		1011	# this is slightly dirty (should expose a c-level api)
		1012
		1013	BOOT:
		1014	{
		1015	int i;
		1016	HV *stash = gv_stashpv ("Coro", TRUE);
		1017
		1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1024
		1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1027
		1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1029	coro_ready[i] = newAV ();
		1030
		1031	{
		1032	SV *sv = perl_get_sv("Coro::API", 1);
		1033
		1034	coroapi.schedule = api_schedule;
		1035	coroapi.ready = api_ready;
		1036	coroapi.nready = &coro_nready;
		1037	coroapi.current = coro_current;
		1038
		1039	GCoroAPI = &coroapi;
		1040	sv_setiv(sv, (IV)&coroapi);
		1041	SvREADONLY_on(sv);
		1042	}
		1043	}
		1044
		1045	void
		1046	ready(self)
		1047	SV * self
		1048	PROTOTYPE: $
		1049	CODE:
		1050	api_ready (self);
		1051
		1052	int
		1053	nready(...)
		1054	PROTOTYPE:
		1055	CODE:
		1056	RETVAL = coro_nready;
		1057	OUTPUT:
		1058	RETVAL
		1059
		1060	void
		1061	schedule(...)
		1062	PROTOTYPE:
		1063	ALIAS:
		1064	cede = 1
		1065	CODE:
		1066	api_schedule (ix);
		1067

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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 1.36 by root, Fri Oct 5 14:20:10 2001 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.36 by root, Fri Oct 5 14:20:10 2001 UTC