[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 1.38 by root, Wed Nov 7 00:21:06 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;
		61	/* TODO: PL_pmop might be nice && effortless to save. */
33		62
34	/* saved global state not related to stacks */	63	/* saved global state not related to stacks */
35	U8 dowarn;	64	U8 dowarn;
		65	I32 in_eval;
36		66
37	/* the stacks and related info (callchain etc..) */	67	/* the stacks and related info (callchain etc..) */
38	PERL_SI *curstackinfo;	68	PERL_SI *curstackinfo;
39	AV *curstack;	69	AV *curstack;
40	AV *mainstack;	70	AV *mainstack;
…		…
58	I32 savestack_max;	88	I32 savestack_max;
59	OP **retstack;	89	OP **retstack;
60	I32 retstack_ix;	90	I32 retstack_ix;
61	I32 retstack_max;	91	I32 retstack_max;
62	COP *curcop;	92	COP *curcop;
63	JMPENV start_env;
64	JMPENV *top_env;	93	JMPENV *top_env;
65		94
66	/* data associated with this coroutine (initial args) */	95	/* data associated with this coroutine (initial args) */
67	AV *args;	96	AV *args;
68	};	97	};
…		…
70	typedef struct coro *Coro__State;	99	typedef struct coro *Coro__State;
71	typedef struct coro *Coro__State_or_hashref;	100	typedef struct coro *Coro__State_or_hashref;
72		101
73	static AV main_mainstack; / used to differentiate between $main and others */	102	static AV main_mainstack; / used to differentiate between $main and others */
74	static HV *coro_state_stash;	103	static HV *coro_state_stash;
		104	static SV *ucoro_state_sv;
		105	static U32 ucoro_state_hash;
75	static HV *padlist_cache;	106	static HV *padlist_cache;
76		107
77	/* mostly copied from op.c:cv_clone2 */	108	/* mostly copied from op.c:cv_clone2 */
78	STATIC AV *	109	STATIC AV *
79	clone_padlist (AV *protopadlist)	110	clone_padlist (AV *protopadlist)
…		…
167		198
168	return newpadlist;	199	return newpadlist;
169	}	200	}
170		201
171	#ifdef MAY_FLUSH	202	#ifdef MAY_FLUSH
172	STATIC AV *	203	STATIC void
173	free_padlist (AV *padlist)	204	free_padlist (AV *padlist)
174	{	205	{
175	/* may be during global destruction */	206	/* may be during global destruction */
176	if (SvREFCNT(padlist))	207	if (SvREFCNT(padlist))
177	{	208	{
…		…
242	#endif	273	#endif
243		274
244	#define SB do {	275	#define SB do {
245	#define SE } while (0)	276	#define SE } while (0)
246		277
247	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	278	#define LOAD(state) load_state(aTHX_ (state));
248	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	279	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
249		280
250	#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
251		282
252	static void	283	static void
253	load_state(pTHX_ Coro__State c)	284	load_state(pTHX_ Coro__State c)
254	{	285	{
255	PL_dowarn = c->dowarn;	286	PL_dowarn = c->dowarn;
		287	PL_in_eval = c->in_eval;
256		288
257	PL_curstackinfo = c->curstackinfo;	289	PL_curstackinfo = c->curstackinfo;
258	PL_curstack = c->curstack;	290	PL_curstack = c->curstack;
259	PL_mainstack = c->mainstack;	291	PL_mainstack = c->mainstack;
260	PL_stack_sp = c->stack_sp;	292	PL_stack_sp = c->stack_sp;
…		…
277	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
278	PL_retstack = c->retstack;	310	PL_retstack = c->retstack;
279	PL_retstack_ix = c->retstack_ix;	311	PL_retstack_ix = c->retstack_ix;
280	PL_retstack_max = c->retstack_max;	312	PL_retstack_max = c->retstack_max;
281	PL_curcop = c->curcop;	313	PL_curcop = c->curcop;
282	PL_start_env = c->start_env;
283	PL_top_env = c->top_env;	314	PL_top_env = c->top_env;
284		315
285	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	316	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
286	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	317	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
287	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	318	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
327		358
328	PUSHs (Nullsv);	359	PUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	360	/* this loop was inspired by pp_caller */
330	for (;;)	361	for (;;)
331	{	362	{
332	do	363	while (cxix >= 0)
333	{	364	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	365	PERL_CONTEXT *cx = &ccstk[cxix--];
335		366
336	if (CxTYPE(cx) == CXt_SUB)	367	if (CxTYPE(cx) == CXt_SUB)
337	{	368	{
…		…
363	/* 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? */
364	/* my bold guess is as a simple, plain sub... */	395	/* my bold guess is as a simple, plain sub... */
365	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");
366	}	397	}
367	}	398	}
368	while (cxix >= 0);
369		399
370	if (top_si->si_type == PERLSI_MAIN)	400	if (top_si->si_type == PERLSI_MAIN)
371	break;	401	break;
372		402
373	top_si = top_si->si_prev;	403	top_si = top_si->si_prev;
…		…
380		410
381	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;
382	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	412	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
383	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	413	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
384		414
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;	415	c->dowarn = PL_dowarn;
		416	c->in_eval = PL_in_eval;
391		417
392	c->curstackinfo = PL_curstackinfo;	418	c->curstackinfo = PL_curstackinfo;
393	c->curstack = PL_curstack;	419	c->curstack = PL_curstack;
394	c->mainstack = PL_mainstack;	420	c->mainstack = PL_mainstack;
395	c->stack_sp = PL_stack_sp;	421	c->stack_sp = PL_stack_sp;
…		…
412	c->savestack_max = PL_savestack_max;	438	c->savestack_max = PL_savestack_max;
413	c->retstack = PL_retstack;	439	c->retstack = PL_retstack;
414	c->retstack_ix = PL_retstack_ix;	440	c->retstack_ix = PL_retstack_ix;
415	c->retstack_max = PL_retstack_max;	441	c->retstack_max = PL_retstack_max;
416	c->curcop = PL_curcop;	442	c->curcop = PL_curcop;
417	c->start_env = PL_start_env;
418	c->top_env = PL_top_env;	443	c->top_env = PL_top_env;
419	}	444	}
420		445
421	/*	446	/*
422	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
…		…
434		459
435	PL_stack_base = AvARRAY(PL_curstack);	460	PL_stack_base = AvARRAY(PL_curstack);
436	PL_stack_sp = PL_stack_base;	461	PL_stack_sp = PL_stack_base;
437	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438		463
439	New(50,PL_tmps_stack,64,SV*);	464	New(50,PL_tmps_stack,96,SV*);
440	PL_tmps_floor = -1;	465	PL_tmps_floor = -1;
441	PL_tmps_ix = -1;	466	PL_tmps_ix = -1;
442	PL_tmps_max = 64;	467	PL_tmps_max = 96;
443		468
444	New(54,PL_markstack,12,I32);	469	New(54,PL_markstack,16,I32);
445	PL_markstack_ptr = PL_markstack;	470	PL_markstack_ptr = PL_markstack;
446	PL_markstack_max = PL_markstack + 12;	471	PL_markstack_max = PL_markstack + 16;
447		472
448	SET_MARK_OFFSET;	473	SET_MARK_OFFSET;
449		474
450	New(54,PL_scopestack,12,I32);	475	New(54,PL_scopestack,16,I32);
451	PL_scopestack_ix = 0;	476	PL_scopestack_ix = 0;
452	PL_scopestack_max = 12;	477	PL_scopestack_max = 16;
453		478
454	New(54,PL_savestack,64,ANY);	479	New(54,PL_savestack,96,ANY);
455	PL_savestack_ix = 0;	480	PL_savestack_ix = 0;
456	PL_savestack_max = 64;	481	PL_savestack_max = 96;
457		482
458	New(54,PL_retstack,8,OP*);	483	New(54,PL_retstack,8,OP*);
459	PL_retstack_ix = 0;	484	PL_retstack_ix = 0;
460	PL_retstack_max = 8;	485	PL_retstack_max = 8;
461	}	486	}
…		…
465	* still there is a memleak of 128 bytes...	490	* still there is a memleak of 128 bytes...
466	*/	491	*/
467	STATIC void	492	STATIC void
468	destroy_stacks(pTHX)	493	destroy_stacks(pTHX)
469	{	494	{
		495	if (!IN_DESTRUCT)
		496	{
470	/* is this ugly, I ask? */	497	/* is this ugly, I ask? */
471	while (PL_scopestack_ix)	498	while (PL_scopestack_ix)
472	LEAVE;	499	LEAVE;
473		500
474	/* sure it is, but more important: is it correct?? :/ */	501	/* sure it is, but more important: is it correct?? :/ */
475	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 */
476	FREETMPS;	503	FREETMPS;
		504	}
477		505
478	while (PL_curstackinfo->si_next)	506	while (PL_curstackinfo->si_next)
479	PL_curstackinfo = PL_curstackinfo->si_next;	507	PL_curstackinfo = PL_curstackinfo->si_next;
480		508
481	while (PL_curstackinfo)	509	while (PL_curstackinfo)
…		…
486	dSP;	514	dSP;
487	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488	PUTBACK; /* possibly superfluous */	516	PUTBACK; /* possibly superfluous */
489	}	517	}
490		518
		519	if (!IN_DESTRUCT)
		520	{
491	dounwind(-1);	521	dounwind(-1);
492
493	SvREFCNT_dec(PL_curstackinfo->si_stack);	522	SvREFCNT_dec(PL_curstackinfo->si_stack);
		523	}
		524
494	Safefree(PL_curstackinfo->si_cxstack);	525	Safefree(PL_curstackinfo->si_cxstack);
495	Safefree(PL_curstackinfo);	526	Safefree(PL_curstackinfo);
496	PL_curstackinfo = p;	527	PL_curstackinfo = p;
497	}	528	}
498		529
…		…
502	Safefree(PL_savestack);	533	Safefree(PL_savestack);
503	Safefree(PL_retstack);	534	Safefree(PL_retstack);
504	}	535	}
505		536
506	static void	537	static void
507	allocate_stack (Coro__State ctx)	538	allocate_stack (Coro__State ctx, int alloc)
508	{	539	{
		540	coro_stack *stack;
		541
		542	New (0, stack, 1, coro_stack);
		543
		544	stack->refcnt = 1;
		545	stack->usecnt = 1;
		546	stack->gencnt = ctx->gencnt = 0;
		547	if (alloc)
		548	{
509	#ifdef HAVE_MMAP	549	#if HAVE_MMAP
510	ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */	550	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);	551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
512	if (ctx->sptr == (void *)-1)	552	if (stack->sptr == (void *)-1)
513	#endif	553	#endif
514	{	554	{
515	/FIXME//D//* reasonable stack size! */	555	/FIXME//D//* reasonable stack size! */
516	ctx->ssize = 4096 * sizeof (long);	556	stack->ssize = -4096 * sizeof (long);
517	New (0, ctx->sptr, 4096, long);	557	New (0, stack->sptr, 4096, long);
		558	}
518	}	559	}
		560	else
		561	stack->sptr = 0;
		562
		563	ctx->stack = stack;
519	}	564	}
520		565
521	static void	566	static void
522	deallocate_stack (Coro__State ctx)	567	deallocate_stack (Coro__State ctx)
523	{	568	{
		569	coro_stack *stack = ctx->stack;
		570
		571	ctx->stack = 0;
		572
		573	if (stack)
		574	{
		575	if (!--stack->refcnt)
		576	{
524	#ifdef HAVE_MMAP	577	#ifdef HAVE_MMAP
525	munmap (ctx->sptr, ctx->ssize);	578	if (stack->ssize > 0 && stack->sptr)
		579	munmap (stack->sptr, stack->ssize);
		580	else
526	#else	581	#else
527	Safefree (ctx->sptr);	582	Safefree (stack->sptr);
528	#endif	583	#endif
		584	Safefree (stack);
		585	}
		586	else if (ctx->gencnt == stack->gencnt)
		587	--stack->usecnt;
		588	}
529	}	589	}
530		590
531	/* might go away together with optional SAVE_CCTXT */
532	static void	591	static void
533	setup_coro (void *arg)	592	setup_coro (void *arg)
534	{	593	{
535	/*	594	/*
536	* emulate part of the perl startup here.	595	* emulate part of the perl startup here.
…		…
538	dSP;	597	dSP;
539	Coro__State ctx = (Coro__State)arg;	598	Coro__State ctx = (Coro__State)arg;
540	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	599	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
541		600
542	coro_init_stacks (aTHX);	601	coro_init_stacks (aTHX);
543	JMPENV_BOOTSTRAP;
544	SPAGAIN;
545
546	/PL_curcop = 0;/	602	/PL_curcop = 0;/
		603	/PL_in_eval = PL_in_eval;/ /* inherit */
547	SvREFCNT_dec (GvAV (PL_defgv));	604	SvREFCNT_dec (GvAV (PL_defgv));
548	GvAV (PL_defgv) = ctx->args;	605	GvAV (PL_defgv) = ctx->args;
549		606
		607	SPAGAIN;
		608
550	if (ctx->sptr)	609	if (ctx->stack)
551	{	610	{
		611	ctx->cursp = 0;
		612
552	PUSHMARK(SP);	613	PUSHMARK(SP);
553	PUTBACK;	614	PUTBACK;
554	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	615	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		616
		617	if (SvTRUE (ERRSV))
		618	croak (NULL);
		619	else
555	croak ("FATAL: CCTXT coroutine returned!");	620	croak ("FATAL: CCTXT coroutine returned!");
556	}	621	}
557	else	622	else
558	{	623	{
559	UNOP myop;	624	UNOP myop;
560		625
…		…
579		644
580	ENTER; /* necessary e.g. for dounwind */	645	ENTER; /* necessary e.g. for dounwind */
581	}	646	}
582	}	647	}
583		648
		649	static void
		650	continue_coro (void *arg)
		651	{
		652	/*
		653	* this is a _very_ stripped down perl interpreter ;)
		654	*/
		655	Coro__State ctx = (Coro__State)arg;
		656	JMPENV coro_start_env;
		657
		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
		664	ctx->cursp = 0;
		665	PL_op = PL_op->op_next;
		666	CALLRUNOPS(aTHX);
		667
		668	abort ();
		669	}
		670
584	STATIC void	671	STATIC void
585	transfer(pTHX_ struct coro prev, struct coro next, int flags)	672	transfer(pTHX_ struct coro prev, struct coro next, int flags)
586	{	673	{
587	dSP;	674	dSTACKLEVEL;
		675	static struct coro *xnext;
588		676
589	if (prev != next)	677	if (prev != next)
590	{	678	{
591	/*	679	xnext = next;
592	* this could be done in newprocess which would lead to	680
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)	681	if (next->mainstack)
598	{	682	{
599	SAVE (prev, flags);	683	SAVE (prev, flags);
600	LOAD (next);	684	LOAD (next);
601		685
602	/* mark this state as in-use */	686	/* mark this state as in-use */
603	next->mainstack = 0;	687	next->mainstack = 0;
604	next->tmps_ix = -2;	688	next->tmps_ix = -2;
605		689
		690	/* stacklevel changed? if yes, grab the stack for us! */
606	if (flags & TRANSFER_SAVE_CCTXT)	691	if (flags & TRANSFER_SAVE_CCTXT)
607	{	692	{
608	if (!next->ssize)
609	croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611	if (!prev->ssize)	693	if (!prev->stack)
612	prev->ssize = 1; /* mark cctx as valid ;) */	694	allocate_stack (prev, 0);
		695	else if (prev->cursp != stacklevel
		696	&& prev->stack->usecnt > 1)
		697	{
		698	prev->gencnt = ++prev->stack->gencnt;
		699	prev->stack->usecnt = 1;
		700	}
613		701
		702	/* has our stack been invalidated? */
		703	if (next->stack && next->stack->gencnt != next->gencnt)
		704	{
		705	deallocate_stack (next);
		706	allocate_stack (next, 1);
		707	coro_create (&(next->stack->cctx),
		708	continue_coro, (void *)next,
		709	next->stack->sptr, labs (next->stack->ssize));
		710	}
		711
614	coro_transfer (&(prev->cctx), &(next->cctx));	712	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		713	/* don't add any code here */
615	}	714	}
616		715
617	}	716	}
618	else if (next->tmps_ix == -2)	717	else if (next->tmps_ix == -2)
619	croak ("tried to transfer to running coroutine");	718	croak ("tried to transfer to running coroutine");
…		…
621	{	720	{
622	SAVE (prev, -1); /* first get rid of the old state */	721	SAVE (prev, -1); /* first get rid of the old state */
623		722
624	if (flags & TRANSFER_SAVE_CCTXT)	723	if (flags & TRANSFER_SAVE_CCTXT)
625	{	724	{
626	if (!next->ssize)	725	if (!prev->stack)
		726	allocate_stack (prev, 0);
		727
		728	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
627	{	729	{
		730	setup_coro (next);
		731
		732	prev->stack->refcnt++;
		733	prev->stack->usecnt++;
		734	next->stack = prev->stack;
		735	next->gencnt = prev->gencnt;
		736	}
		737	else
		738	{
628	allocate_stack (next);	739	allocate_stack (next, 1);
629	coro_create (&(next->cctx),	740	coro_create (&(next->stack->cctx),
630	setup_coro, (void *)next,	741	setup_coro, (void *)next,
631	next->sptr, next->ssize);	742	next->stack->sptr, labs (next->stack->ssize));
		743	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		744	/* don't add any code here */
632	}	745	}
633
634	if (!prev->ssize)
635	prev->ssize = 1; /* mark cctx as valid ;) */
636
637	coro_transfer (&(prev->cctx), &(next->cctx));
638	}	746	}
639	else	747	else
640	setup_coro (next);	748	setup_coro (next);
641	}	749	}
		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	*/
		756	xnext->cursp = stacklevel;
		757	}
		758	}
		759
		760	static struct coro *
		761	sv_to_coro (SV arg, const char funcname, const char *varname)
		762	{
		763	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
		764	{
		765	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
		766
		767	if (!he)
		768	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
		769
		770	arg = HeVAL(he);
		771	}
		772
		773	/* must also be changed inside Coro::Cont::yield */
		774	if (SvROK(arg) && SvOBJECT(SvRV(arg))
		775	&& SvSTASH(SvRV(arg)) == coro_state_stash)
		776	return (struct coro ) SvIV((SV)SvRV(arg));
		777
		778	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
		779	/NORETURN/
		780	}
		781
		782	static void
		783	api_transfer(pTHX_ SV prev, SV next, int flags)
		784	{
		785	transfer(aTHX_
		786	sv_to_coro (prev, "Coro::transfer", "prev"),
		787	sv_to_coro (next, "Coro::transfer", "next"),
		788	flags);
		789	}
		790
		791	/ Coro ******************************************************************/
		792
		793	#define PRIO_MAX 3
		794	#define PRIO_HIGH 1
		795	#define PRIO_NORMAL 0
		796	#define PRIO_LOW -1
		797	#define PRIO_IDLE -3
		798	#define PRIO_MIN -4
		799
		800	/* for Coro.pm */
		801	static GV coro_current, coro_idle;
		802	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		803	static int coro_nready;
		804
		805	static void
		806	coro_enq (SV *sv)
		807	{
		808	if (SvROK (sv))
		809	{
		810	SV *hv = SvRV (sv);
		811	if (SvTYPE (hv) == SVt_PVHV)
		812	{
		813	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
		814	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		815
		816	prio = prio > PRIO_MAX ? PRIO_MAX
		817	: prio < PRIO_MIN ? PRIO_MIN
		818	: prio;
		819
		820	av_push (coro_ready [prio - PRIO_MIN], sv);
		821	coro_nready++;
		822
		823	return;
		824	}
		825	}
		826
		827	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		828	}
		829
		830	static SV *
		831	coro_deq (int min_prio)
		832	{
		833	int prio = PRIO_MAX - PRIO_MIN;
		834
		835	min_prio -= PRIO_MIN;
		836	if (min_prio < 0)
		837	min_prio = 0;
		838
		839	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		840	if (av_len (coro_ready[prio]) >= 0)
		841	{
		842	coro_nready--;
		843	return av_shift (coro_ready[prio]);
642	}	844	}
		845
		846	return 0;
		847	}
		848
		849	static void
		850	api_ready (SV *coro)
		851	{
		852	coro_enq (SvREFCNT_inc (coro));
		853	}
		854
		855	static void
		856	api_schedule (int cede)
		857	{
		858	SV prev, next;
		859
		860	prev = GvSV (coro_current);
		861
		862	if (cede)
		863	coro_enq (SvREFCNT_inc (prev));
		864
		865	next = coro_deq (PRIO_MIN);
		866
		867	if (!next)
		868	next = SvREFCNT_inc (GvSV (coro_idle));
		869
		870	GvSV (coro_current) = SvREFCNT_inc (next);
		871	transfer (aTHX_
		872	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
		873	sv_to_coro (next, "Coro::schedule", "next coroutine"),
		874	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		875	SvREFCNT_dec (next);
		876	SvREFCNT_dec (prev);
643	}	877	}
644		878
645	MODULE = Coro::State PACKAGE = Coro::State	879	MODULE = Coro::State PACKAGE = Coro::State
646		880
647	PROTOTYPES: ENABLE	881	PROTOTYPES: ENABLE
648		882
649	BOOT:	883	BOOT:
650	{ /* {} necessary for stoopid perl-5.6.x */	884	{ /* {} necessary for stoopid perl-5.6.x */
		885	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		886	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
651	coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE);	887	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652		888
653	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	889	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
654	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	890	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
655	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	891	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
656	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	892	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
657		893
658	if (!padlist_cache)	894	if (!padlist_cache)
659	padlist_cache = newHV ();	895	padlist_cache = newHV ();
660		896
661	main_mainstack = PL_mainstack;	897	main_mainstack = PL_mainstack;
		898
		899	coroapi.ver = CORO_API_VERSION;
		900	coroapi.transfer = api_transfer;
662	}	901	}
663		902
664	Coro::State	903	Coro::State
665	_newprocess(args)	904	_newprocess(args)
666	SV * args	905	SV * args
…		…
673		912
674	New (0, coro, 1, struct coro);	913	New (0, coro, 1, struct coro);
675		914
676	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	915	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
677	coro->mainstack = 0; /* actual work is done inside transfer */	916	coro->mainstack = 0; /* actual work is done inside transfer */
678	coro->sptr = 0;	917	coro->stack = 0;
679	coro->ssize = 0;
680		918
681	RETVAL = coro;	919	RETVAL = coro;
682	OUTPUT:	920	OUTPUT:
683	RETVAL	921	RETVAL
684		922
685	void	923	void
686	transfer(prev, next, flags = TRANSFER_SAVE_ALL)	924	transfer(prev, next, flags)
687	Coro::State_or_hashref prev	925	Coro::State_or_hashref prev
688	Coro::State_or_hashref next	926	Coro::State_or_hashref next
689	int flags	927	int flags
690	PROTOTYPE: @	928	PROTOTYPE: @
691	CODE:	929	CODE:
		930	PUTBACK;
692	transfer (aTHX_ prev, next, flags);	931	transfer (aTHX_ prev, next, flags);
		932	SPAGAIN;
693		933
694	void	934	void
695	DESTROY(coro)	935	DESTROY(coro)
696	Coro::State coro	936	Coro::State coro
697	CODE:	937	CODE:
698		938
699	if (coro->mainstack && coro->mainstack != main_mainstack)	939	if (coro->mainstack && coro->mainstack != main_mainstack)
700	{	940	{
701	struct coro temp;	941	struct coro temp;
702		942
		943	PUTBACK;
703	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	944	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
704	LOAD(aTHX_ coro);	945	LOAD(aTHX_ coro);
		946	SPAGAIN;
705		947
706	destroy_stacks (aTHX);	948	destroy_stacks (aTHX);
707		949
708	LOAD((&temp)); /* this will get rid of defsv etc.. */	950	LOAD((&temp)); /* this will get rid of defsv etc.. */
		951	SPAGAIN;
709		952
710	coro->mainstack = 0;	953	coro->mainstack = 0;
711	}	954	}
712		955
713	if (coro->sptr)
714	{
715	deallocate_stack (coro);	956	deallocate_stack (coro);
716	coro->sptr = 0;
717	}
718		957
719	Safefree (coro);	958	Safefree (coro);
720		959
721	void	960	void
722	flush()	961	flush()
723	CODE:	962	CODE:
724	#ifdef MAY_FLUSH	963	#ifdef MAY_FLUSH
725	flush_padlist_cache ();	964	flush_padlist_cache ();
726	#endif	965	#endif
727		966
		967	void
		968	_exit(code)
		969	int code
		970	PROTOTYPE: $
		971	CODE:
		972	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		973	_exit (code);
		974	#else
		975	signal (SIGTERM, SIG_DFL);
		976	raise (SIGTERM);
		977	exit (code);
		978	#endif
		979
728	MODULE = Coro::State PACKAGE = Coro::Cont	980	MODULE = Coro::State PACKAGE = Coro::Cont
729		981
730	# this is slightly dirty	982	# this is slightly dirty (should expose a c-level api)
731		983
732	void	984	void
733	yield(...)	985	yield(...)
734	PROTOTYPE: @	986	PROTOTYPE: @
735	CODE:	987	CODE:
…		…
753	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1005	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
754	SvREFCNT_dec (sv);	1006	SvREFCNT_dec (sv);
755		1007
756	transfer(aTHX_ prev, next, 0);	1008	transfer(aTHX_ prev, next, 0);
757		1009
		1010	MODULE = Coro::State PACKAGE = Coro
		1011
		1012	# this is slightly dirty (should expose a c-level api)
		1013
		1014	BOOT:
		1015	{
		1016	int i;
		1017	HV *stash = gv_stashpv ("Coro", TRUE);
		1018
		1019	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1020	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1021	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1022	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1023	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1024	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1025
		1026	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1027	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1028
		1029	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1030	coro_ready[i] = newAV ();
		1031
		1032	{
		1033	SV *sv = perl_get_sv("Coro::API", 1);
		1034
		1035	coroapi.schedule = api_schedule;
		1036	coroapi.ready = api_ready;
		1037	coroapi.nready = &coro_nready;
		1038	coroapi.current = coro_current;
		1039
		1040	GCoroAPI = &coroapi;
		1041	sv_setiv(sv, (IV)&coroapi);
		1042	SvREADONLY_on(sv);
		1043	}
		1044	}
		1045
		1046	void
		1047	ready(self)
		1048	SV * self
		1049	PROTOTYPE: $
		1050	CODE:
		1051	api_ready (self);
		1052
		1053	int
		1054	nready(...)
		1055	PROTOTYPE:
		1056	CODE:
		1057	RETVAL = coro_nready;
		1058	OUTPUT:
		1059	RETVAL
		1060
		1061	void
		1062	schedule(...)
		1063	PROTOTYPE:
		1064	ALIAS:
		1065	cede = 1
		1066	CODE:
		1067	api_schedule (ix);
		1068

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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 1.38 by root, Wed Nov 7 00:21:06 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 1.38 by root, Wed Nov 7 00:21:06 2001 UTC