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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs.
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC

…		…
27	# ifndef IS_PADCONST	27	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	28	# define IS_PADCONST(v) 0
29	# endif	29	# endif
30	#endif	30	#endif
31		31
		32	#include <stdio.h>
32	#include <errno.h>	33	#include <errno.h>
33		34
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	36	# undef STACKGUARD
36	#endif	37	#endif
…		…
57	# else	58	# else
58	# define BOOT_PAGESIZE	59	# define BOOT_PAGESIZE
59	# endif	60	# endif
60	#endif	61	#endif
61		62
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64
65	/* The next macro should declare a variable stacklevel that contains and approximation	63	/* The next macro should declare a variable stacklevel that contains and approximation
66	* to the current C stack pointer. Its property is that it changes with each call	64	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	65	* and should be unique. */
		66	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	67	#define STACKLEVEL ((void *)&stacklevel)
69		68
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		70
72	#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74	#include "CoroAPI.h"	71	#include "CoroAPI.h"
		72
		73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
75		74
76	#ifdef USE_ITHREADS	75	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	76	static perl_mutex coro_mutex;
78	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
82	# define UNLOCK (void)0	81	# define UNLOCK (void)0
83	#endif	82	#endif
84		83
85	static struct CoroAPI coroapi;	84	static struct CoroAPI coroapi;
86	static AV main_mainstack; / used to differentiate between $main and others */	85	static AV main_mainstack; / used to differentiate between $main and others */
87	static HV *coro_state_stash;	86	static HV coro_state_stash, coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV coro_mortal; / will be freed after next transfer */	87	static SV coro_mortal; / will be freed after next transfer */
91		88
92	/* this is actually not only the c stack but also c registers etc... */	89	/* this is a structure representing a c-level coroutine */
93	typedef struct {	90	typedef struct coro_stack {
94	int refcnt; /* pointer reference counter */	91	struct coro_stack *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		92
98	coro_context cctx;	93	/* the stack */
99
100	void *sptr;	94	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	95	long ssize; /* positive == mmap, otherwise malloc */
		96
		97	/* cpu state */
		98	void idle_sp; / original stacklevel when coroutine was created */
		99	JMPENV *top_env;
		100	coro_context cctx;
102	} coro_stack;	101	} coro_stack;
103		102
		103	/* the (fake) coro_stack representing the main program */
		104	static coro_stack *main_stack;
		105
		106	/* this is a structure representing a perl-level coroutine */
104	struct coro {	107	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	108	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;
107
108	/* the optional C context */
109	coro_stack *stack;	109	coro_stack *stack;
110	void *cursp;	110
		111	/* data associated with this coroutine (initial args) */
		112	AV *args;
111	int gencnt;	113	int refcnt;
112		114
113	/* optionally saved, might be zero */	115	/* optionally saved, might be zero */
114	AV *defav;	116	AV *defav;
115	SV *defsv;	117	SV *defsv;
116	SV *errsv;	118	SV *errsv;
…		…
146	OP **retstack;	148	OP **retstack;
147	I32 retstack_ix;	149	I32 retstack_ix;
148	I32 retstack_max;	150	I32 retstack_max;
149	PMOP *curpm;	151	PMOP *curpm;
150	COP *curcop;	152	COP *curcop;
151	JMPENV *top_env;
152		153
153	/* data associated with this coroutine (initial args) */	154	/* coro process data */
154	AV *args;	155	int prio;
155	};	156	};
156		157
157	typedef struct coro *Coro__State;	158	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	159	typedef struct coro *Coro__State_or_hashref;
159		160
…		…
163	AV *padlist = CvPADLIST (cv);	164	AV *padlist = CvPADLIST (cv);
164	AV newpadlist, newpad;	165	AV newpadlist, newpad;
165		166
166	newpadlist = newAV ();	167	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	168	AvREAL_off (newpadlist);
		169	#if PERL_VERSION < 9
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		171	#else
		172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		173	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	175	--AvFILLp (padlist);
171		176
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
173	av_store (newpadlist, 1, (SV *)newpad);	178	av_store (newpadlist, 1, (SV *)newpad);
…		…
298	PL_retstack_ix = c->retstack_ix;	303	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;	304	PL_retstack_max = c->retstack_max;
300	#endif	305	#endif
301	PL_curpm = c->curpm;	306	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;	307	PL_curcop = c->curcop;
303	PL_top_env = c->top_env;
304		308
305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
307	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
308		312
…		…
426	c->retstack_ix = PL_retstack_ix;	430	c->retstack_ix = PL_retstack_ix;
427	c->retstack_max = PL_retstack_max;	431	c->retstack_max = PL_retstack_max;
428	#endif	432	#endif
429	c->curpm = PL_curpm;	433	c->curpm = PL_curpm;
430	c->curcop = PL_curcop;	434	c->curcop = PL_curcop;
431	c->top_env = PL_top_env;
432	}	435	}
433		436
434	/*	437	/*
435	* allocate various perl stacks. This is an exact copy	438	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	439	* of perl.c:init_stacks, except that it uses less memory
…		…
530	Safefree (PL_retstack);	533	Safefree (PL_retstack);
531	#endif	534	#endif
532	}	535	}
533		536
534	static void	537	static void
535	allocate_stack (Coro__State ctx, int alloc)	538	setup_coro (struct coro *coro)
536	{
537	coro_stack *stack;
538
539	New (0, stack, 1, coro_stack);
540
541	stack->refcnt = 1;
542	stack->usecnt = 1;
543	stack->gencnt = ctx->gencnt = 0;
544
545	if (alloc)
546	{
547	#if HAVE_MMAP
548	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
550	if (stack->sptr != (void *)-1)
551	{
552	# if STACKGUARD
553	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
554	# endif
555	}
556	else
557	#endif
558	{
559	stack->ssize = - (STACKSIZE * (long)sizeof (long));
560	New (0, stack->sptr, STACKSIZE, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565
566	ctx->stack = stack;
567	}
568
569	static void
570	deallocate_stack (Coro__State ctx)
571	{
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{
578	if (!--stack->refcnt)
579	{
580	#ifdef HAVE_MMAP
581	if (stack->ssize > 0 && stack->sptr)
582	munmap (stack->sptr, stack->ssize);
583	else
584	#endif
585	Safefree (stack->sptr);
586
587	Safefree (stack);
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}
593
594	static void
595	setup_coro (void *arg)
596	{	539	{
597	/*	540	/*
598	* emulate part of the perl startup here.	541	* emulate part of the perl startup here.
599	*/	542	*/
600	dTHX;	543	dTHX;
601	dSP;	544	dSP;
602	Coro__State ctx = (Coro__State)arg;	545	UNOP myop;
603	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);	546	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
604		547
605	coro_init_stacks (aTHX);	548	coro_init_stacks (aTHX);
606	/PL_curcop = 0;/	549	/PL_curcop = 0;/
607	/PL_in_eval = PL_in_eval;/ /* inherit */	550	/PL_in_eval = PL_in_eval;/ /* inherit */
608	SvREFCNT_dec (GvAV (PL_defgv));	551	SvREFCNT_dec (GvAV (PL_defgv));
609	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	552	GvAV (PL_defgv) = coro->args; coro->args = 0;
610		553
611	SPAGAIN;	554	SPAGAIN;
612		555
613	if (ctx->stack)
614	{
615	ctx->cursp = 0;
616
617	PUSHMARK(SP);
618	PUTBACK;
619	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
620
621	if (SvTRUE (ERRSV))
622	croak (NULL);
623	else
624	croak ("FATAL: CCTXT coroutine returned!");
625	}
626	else
627	{
628	UNOP myop;
629
630	PL_op = (OP *)&myop;
631
632	Zero(&myop, 1, UNOP);	556	Zero (&myop, 1, UNOP);
633	myop.op_next = Nullop;	557	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;	558	myop.op_flags = OPf_WANT_VOID;
635		559
		560	PL_op = (OP *)&myop;
		561
636	PUSHMARK(SP);	562	PUSHMARK(SP);
637	XPUSHs (sub_init);	563	XPUSHs (sub_init);
638	/*
639	* the next line is slightly wrong, as PL_op->op_next
640	* is actually being executed so we skip the first op.
641	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)
644	*/
645	PUTBACK;	564	PUTBACK;
646	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647	SPAGAIN;	566	SPAGAIN;
648		567
649	ENTER; /* necessary e.g. for dounwind */	568	ENTER; /* necessary e.g. for dounwind */
650	}
651	}	569	}
652		570
653	static void	571	static void
654	continue_coro (void *arg)	572	free_coro_mortal ()
655	{	573	{
656	/*
657	* this is a _very_ stripped down perl interpreter ;)
658	*/
659	dTHX;
660	Coro__State ctx = (Coro__State)arg;
661
662	PL_top_env = &ctx->start_env;
663
664	ctx->cursp = 0;
665	PL_op = PL_op->op_next;
666	CALLRUNOPS(aTHX);
667
668	abort ();
669	}
670
671	static void
672	transfer (pTHX_ struct coro prev, struct coro next, int flags)
673	{
674	dSTACKLEVEL;
675
676	if (prev != next)
677	{
678	if (next->mainstack)
679	{
680	LOCK;
681	SAVE (prev, flags);
682	LOAD (next);
683	UNLOCK;
684
685	/* mark this state as in-use */
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
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	}
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
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	prev->cursp = stacklevel;
713	/* don't add any code here */
714	}
715	else
716	next->cursp = stacklevel;
717	}
718	else if (next->tmps_ix == -2)
719	croak ("tried to transfer to running coroutine");
720	else
721	{
722	LOCK;
723	SAVE (prev, -1); /* first get rid of the old state */
724	UNLOCK;
725
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	PL_top_env = &next->start_env;
734
735	setup_coro (next);
736	next->cursp = stacklevel;
737
738	prev->stack->refcnt++;
739	prev->stack->usecnt++;
740	next->stack = prev->stack;
741	next->gencnt = prev->gencnt;
742	}
743	else
744	{
745	assert (!next->stack);
746	allocate_stack (next, 1);
747	coro_create (&(next->stack->cctx),
748	setup_coro, (void *)next,
749	next->stack->sptr, labs (next->stack->ssize));
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	}
755	else
756	{
757	setup_coro (next);
758	next->cursp = stacklevel;
759	}
760	}
761	}
762
763	LOCK;
764	if (coro_mortal)	574	if (coro_mortal)
765	{	575	{
766	SvREFCNT_dec (coro_mortal);	576	SvREFCNT_dec (coro_mortal);
767	coro_mortal = 0;	577	coro_mortal = 0;
768	}	578	}
		579	}
		580
		581	static void
		582	coro_run (void *arg)
		583	{
		584	/*
		585	* this is a _very_ stripped down perl interpreter ;)
		586	*/
		587	dTHX;
		588	int ret;
		589
769	UNLOCK;	590	UNLOCK;
770	}
771		591
772	#define SV_CORO(sv,func) \	592	PL_top_env = &PL_start_env;
773	do { \
774	if (SvROK (sv)) \
775	sv = SvRV (sv); \
776	\
777	if (SvTYPE (sv) == SVt_PVHV) \
778	{ \
779	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
780	\
781	if (!he) \
782	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
783	\
784	(sv) = SvRV (HeVAL(he)); \
785	} \
786	\
787	/* must also be changed inside Coro::Cont::yield */ \
788	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
789	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
790	\
791	} while(0)
792		593
793	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	594	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
		595	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
794		596
		597	/* continue at cctx_init, without entersub */
		598	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		599
		600	/* somebody will hit me for both perl_run and PL_restartop */
		601	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
		602	printf ("ret %d\n", ret);//D
		603
		604	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		605	abort ();
		606	}
		607
		608	static coro_stack *
		609	stack_new ()
		610	{
		611	coro_stack *stack;
		612
		613	New (0, stack, 1, coro_stack);
		614
		615	#if HAVE_MMAP
		616
		617	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		618	/* mmap suppsedly does allocate-on-write for us */
		619	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		620
		621	if (stack->sptr == (void *)-1)
		622	{
		623	perror ("FATAL: unable to mmap stack for coroutine");
		624	_exit (EXIT_FAILURE);
		625	}
		626
		627	# if STACKGUARD
		628	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		629	# endif
		630
		631	#else
		632
		633	stack->ssize = STACKSIZE * (long)sizeof (long);
		634	New (0, stack->sptr, STACKSIZE, long);
		635
		636	if (!stack->sptr)
		637	{
		638	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		639	_exit (EXIT_FAILURE);
		640	}
		641
		642	#endif
		643
		644	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		645
		646	return stack;
		647	}
		648
		649	static void
		650	stack_free (coro_stack *stack)
		651	{
		652	if (!stack \|\| stack == main_stack)
		653	return;
		654
		655	#if HAVE_MMAP
		656	munmap (stack->sptr, stack->ssize);
		657	#else
		658	Safefree (stack->sptr);
		659	#endif
		660
		661	Safefree (stack);
		662	}
		663
		664	static coro_stack *stack_first;
		665
		666	static coro_stack *
		667	stack_get ()
		668	{
		669	coro_stack *stack;
		670
		671	if (stack_first)
		672	{
		673	stack = stack_first;
		674	stack_first = stack->next;
		675	}
		676	else
		677	{
		678	stack = stack_new ();
		679	PL_op = PL_op->op_next;
		680	}
		681
		682	return stack;
		683	}
		684
		685	static void
		686	stack_put (coro_stack *stack)
		687	{
		688	stack->next = stack_first;
		689	stack_first = stack;
		690	}
		691
		692	/* never call directly, always through the coro_state_transfer global variable */
		693	static void
		694	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)
		695	{
		696	dSTACKLEVEL;
		697
		698	/* sometimes transfer is only called to set idle_sp */
		699	if (flags == TRANSFER_SET_STACKLEVEL)
		700	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		701	else if (prev != next)
		702	{
		703	coro_stack *prev__stack;
		704
		705	LOCK;
		706
		707	if (next->mainstack)
		708	{
		709	/* coroutine already started */
		710	SAVE (prev, flags);
		711	LOAD (next);
		712	}
		713	else
		714	{
		715	/* need to start coroutine */
		716	/* first get rid of the old state */
		717	SAVE (prev, -1);
		718	/* setup coroutine call */
		719	setup_coro (next);
		720	/* need a stack */
		721	next->stack = 0;
		722	}
		723
		724	prev__stack = prev->stack;
		725
		726	/* possibly "free" the stack */
		727	if (prev__stack->idle_sp == STACKLEVEL)
		728	{
		729	stack_put (prev__stack);
		730	prev->stack = 0;
		731	}
		732
		733	if (!next->stack)
		734	next->stack = stack_get ();
		735
		736	if (prev__stack != next->stack)
		737	{
		738	prev__stack->top_env = PL_top_env;
		739	PL_top_env = next->stack->top_env;
		740	printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D
		741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		742	}
		743
		744	free_coro_mortal ();
		745
		746	UNLOCK;
		747	}
		748	}
		749
		750	/* use this function pointer to call the above function */
		751	/* this is done to increase chances of the compiler not inlining the call */
		752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		753	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
		754
		755	struct transfer_args
		756	{
		757	struct coro prev, next;
		758	int flags;
		759	};
		760
		761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		762
		763	static void
		764	coro_state_destroy (struct coro *coro)
		765	{
		766	if (coro->refcnt--)
		767	return;
		768
		769	if (coro->mainstack && coro->mainstack != main_mainstack)
		770	{
		771	struct coro temp;
		772
		773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		774	LOAD (aTHX_ coro);
		775
		776	destroy_stacks (aTHX);
		777
		778	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		779
		780	coro->mainstack = 0;
		781	}
		782
		783	stack_free (coro->stack);
		784	SvREFCNT_dec (coro->args);
		785	Safefree (coro);
		786	}
		787
795	static void	788	static int
		789	coro_state_clear (SV sv, MAGIC mg)
		790	{
		791	struct coro coro = (struct coro )mg->mg_ptr;
		792	mg->mg_ptr = 0;
		793
		794	coro_state_destroy (coro);
		795
		796	return 0;
		797	}
		798
		799	static int
		800	coro_state_dup (MAGIC mg, CLONE_PARAMS params)
		801	{
		802	struct coro coro = (struct coro )mg->mg_ptr;
		803
		804	++coro->refcnt;
		805
		806	return 0;
		807	}
		808
		809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		810
		811	static struct coro *
		812	SvSTATE (SV *coro)
		813	{
		814	HV *stash;
		815	MAGIC *mg;
		816
		817	if (SvROK (coro))
		818	coro = SvRV (coro);
		819
		820	stash = SvSTASH (coro);
		821	if (stash != coro_stash && stash != coro_state_stash)
		822	{
		823	/* very slow, but rare, check */
		824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		825	croak ("Coro::State object required");
		826	}
		827
		828	mg = SvMAGIC (coro);
		829	assert (mg->mg_type == PERL_MAGIC_ext);
		830	return (struct coro *)mg->mg_ptr;
		831	}
		832
		833	static void
		834	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)
		835	{
		836	ta->prev = SvSTATE (prev);
		837	ta->next = SvSTATE (next);
		838	ta->flags = flags;
		839	}
		840
		841	static void
796	api_transfer(pTHX_ SV prev, SV next, int flags)	842	api_transfer (SV prev, SV next, int flags)
797	{	843	{
798	SV_CORO (prev, "Coro::transfer");	844	dTHX;
799	SV_CORO (next, "Coro::transfer");	845	struct transfer_args ta;
800		846
801	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	847	prepare_transfer (aTHX_ &ta, prev, next, flags);
		848	TRANSFER (ta);
802	}	849	}
803		850
804	/ Coro ******************************************************************/	851	/ Coro ******************************************************************/
805		852
806	#define PRIO_MAX 3	853	#define PRIO_MAX 3
…		…
810	#define PRIO_IDLE -3	857	#define PRIO_IDLE -3
811	#define PRIO_MIN -4	858	#define PRIO_MIN -4
812		859
813	/* for Coro.pm */	860	/* for Coro.pm */
814	static GV coro_current, coro_idle;	861	static GV coro_current, coro_idle;
815	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;	863	static int coro_nready;
817		864
818	static void	865	static void
819	coro_enq (pTHX_ SV *sv)	866	coro_enq (pTHX_ SV *sv)
820	{	867	{
821	SV **xprio;
822	int prio;	868	int prio;
823		869
824	if (SvTYPE (sv) != SVt_PVHV)	870	if (SvTYPE (sv) != SVt_PVHV)
825	croak ("Coro::ready tried to enqueue something that is not a coroutine");	871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
826		872
827	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	873	prio = SvSTATE (sv)->prio;
828	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
829
830	prio = prio > PRIO_MAX ? PRIO_MAX
831	: prio < PRIO_MIN ? PRIO_MIN
832	: prio;
833		874
834	av_push (coro_ready [prio - PRIO_MIN], sv);	875	av_push (coro_ready [prio - PRIO_MIN], sv);
835	coro_nready++;	876	coro_nready++;
836	}	877	}
837		878
…		…
843	min_prio -= PRIO_MIN;	884	min_prio -= PRIO_MIN;
844	if (min_prio < 0)	885	if (min_prio < 0)
845	min_prio = 0;	886	min_prio = 0;
846		887
847	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
848	if (av_len (coro_ready[prio]) >= 0)	889	if (AvFILLp (coro_ready [prio]) >= 0)
849	{	890	{
850	coro_nready--;	891	coro_nready--;
851	return av_shift (coro_ready[prio]);	892	return av_shift (coro_ready [prio]);
852	}	893	}
853		894
854	return 0;	895	return 0;
855	}	896	}
856		897
…		…
866	coro_enq (aTHX_ SvREFCNT_inc (coro));	907	coro_enq (aTHX_ SvREFCNT_inc (coro));
867	UNLOCK;	908	UNLOCK;
868	}	909	}
869		910
870	static void	911	static void
871	api_schedule (void)	912	prepare_schedule (aTHX_ struct transfer_args *ta)
872	{	913	{
873	dTHX;
874
875	SV prev, next;	914	SV current, prev, *next;
876		915
877	LOCK;	916	LOCK;
878		917
879	prev = SvRV (GvSV (coro_current));	918	current = GvSV (coro_current);
		919
		920	for (;;)
		921	{
		922	LOCK;
		923
880	next = coro_deq (aTHX_ PRIO_MIN);	924	next = coro_deq (aTHX_ PRIO_MIN);
881		925
882	if (!next)	926	if (next)
883	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	927	break;
		928
		929	UNLOCK;
		930
		931	{
		932	dSP;
		933
		934	ENTER;
		935	SAVETMPS;
		936
		937	PUSHMARK (SP);
		938	PUTBACK;
		939	call_sv (GvSV (coro_idle), G_DISCARD);
		940
		941	FREETMPS;
		942	LEAVE;
		943	}
		944	}
		945
		946	prev = SvRV (current);
		947	SvRV (current) = next;
884		948
885	/* free this only after the transfer */	949	/* free this only after the transfer */
		950	free_coro_mortal ();
886	coro_mortal = prev;	951	coro_mortal = prev;
887	SV_CORO (prev, "Coro::schedule");
888		952
889	SvRV (GvSV (coro_current)) = next;	953	ta->prev = SvSTATE (prev);
890		954	ta->next = SvSTATE (next);
891	SV_CORO (next, "Coro::schedule");	955	ta->flags = TRANSFER_SAVE_ALL;
892		956
893	UNLOCK;	957	UNLOCK;
894
895	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
896	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
897	}	958	}
898		959
899	static void	960	static void
900	api_cede (void)	961	prepare_cede (aTHX_ struct transfer_args *ta)
901	{	962	{
902	dTHX;
903
904	LOCK;	963	LOCK;
905	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
906	UNLOCK;	965	UNLOCK;
907		966
		967	prepare_schedule (ta);
		968	}
		969
		970	static void
908	api_schedule ();	971	api_schedule (void)
		972	{
		973	dTHX;
		974	struct transfer_args ta;
		975
		976	prepare_schedule (&ta);
		977	TRANSFER (ta);
		978	}
		979
		980	static void
		981	api_cede (void)
		982	{
		983	dTHX;
		984	struct transfer_args ta;
		985
		986	prepare_cede (&ta);
		987	TRANSFER (ta);
909	}	988	}
910		989
911	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
912		991
913	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
914		993
915	BOOT:	994	BOOT:
916	{ /* {} necessary for stoopid perl-5.6.x */	995	{
917	#ifdef USE_ITHREADS	996	#ifdef USE_ITHREADS
918	MUTEX_INIT (&coro_mutex);	997	MUTEX_INIT (&coro_mutex);
919	#endif	998	#endif
920	BOOT_PAGESIZE;	999	BOOT_PAGESIZE;
921		1000
922	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
923	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
924	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
925		1002
926	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
927	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
928	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
929	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
930		1006
931	main_mainstack = PL_mainstack;	1007	main_mainstack = PL_mainstack;
932		1008
933	coroapi.ver = CORO_API_VERSION;	1009	coroapi.ver = CORO_API_VERSION;
934	coroapi.transfer = api_transfer;	1010	coroapi.transfer = api_transfer;
935	}
936		1011
937	Coro::State	1012	Newz (0, main_stack, 1, coro_stack);
938	_newprocess(args)	1013	main_stack->idle_sp = (void *)-1;
939	SV * args	1014
940	PROTOTYPE: $	1015	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1016	}
		1017
		1018	SV *
		1019	new (char *klass, ...)
941	CODE:	1020	CODE:
942	Coro__State coro;	1021	{
		1022	struct coro *coro;
		1023	HV *hv;
		1024	int i;
943		1025
944	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
945	croak ("Coro::State::_newprocess expects an arrayref");
946
947	Newz (0, coro, 1, struct coro);	1026	Newz (0, coro, 1, struct coro);
		1027	coro->args = newAV ();
948		1028
949	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1029	hv = newHV ();
		1030	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1031	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1032
		1033	for (i = 1; i < items; i++)
		1034	av_push (coro->args, newSVsv (ST (i)));
		1035
		1036	coro->stack = main_stack;
950	/coro->mainstack = 0; //actual work is done inside transfer /	1037	/coro->mainstack = 0; //actual work is done inside transfer /
951	/coro->stack = 0;/	1038	/coro->stack = 0;/
952		1039	}
953	/* same as JMPENV_BOOTSTRAP */
954	/* we might be able to recycle start_env, but safe is safe */
955	/Zero(&coro->start_env, 1, JMPENV);/
956	coro->start_env.je_ret = -1;
957	coro->start_env.je_mustcatch = TRUE;
958
959	RETVAL = coro;
960	OUTPUT:	1040	OUTPUT:
961	RETVAL	1041	RETVAL
962		1042
963	void	1043	void
964	transfer(prev, next, flags)	1044	_set_stacklevel (...)
965	SV *prev	1045	ALIAS:
966	SV *next	1046	Coro::State::transfer = 1
967	int flags	1047	Coro::schedule = 2
968	PROTOTYPE: @	1048	Coro::cede = 3
		1049	Coro::Cont::yield = 4
969	CODE:	1050	CODE:
970	PUTBACK;	1051	{
971	SV_CORO (next, "Coro::transfer");	1052	struct transfer_args ta;
972	SV_CORO (prev, "Coro::transfer");	1053
973	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1054	switch (ix)
974	SPAGAIN;	1055	{
		1056	case 0:
		1057	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
		1058	ta.next = 0;
		1059	ta.flags = TRANSFER_SET_STACKLEVEL;
		1060	break;
		1061
		1062	case 1:
		1063	if (items != 3)
		1064	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1065
		1066	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1067	break;
		1068
		1069	case 2:
		1070	prepare_schedule (&ta);
		1071	break;
		1072
		1073	case 3:
		1074	prepare_cede (&ta);
		1075	break;
		1076
		1077	case 4:
		1078	{
		1079	SV *yieldstack;
		1080	SV *sv;
		1081	AV *defav = GvAV (PL_defgv);
		1082
		1083	yieldstack = *hv_fetch (
		1084	(HV *)SvRV (GvSV (coro_current)),
		1085	"yieldstack", sizeof ("yieldstack") - 1,
		1086	0
		1087	);
		1088
		1089	/* set up @_ -- ugly */
		1090	av_clear (defav);
		1091	av_fill (defav, items - 1);
		1092	while (items--)
		1093	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1094
		1095	sv = av_pop ((AV *)SvRV (yieldstack));
		1096	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
		1097	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
		1098	ta.flags = 0;
		1099	SvREFCNT_dec (sv);
		1100	}
		1101	break;
		1102
		1103	}
		1104
		1105	TRANSFER (ta);
		1106	}
975		1107
976	void	1108	void
977	DESTROY(coro)	1109	_clone_state_from (SV dst, SV src)
978	Coro::State coro	1110	CODE:
979	CODE:	1111	{
		1112	struct coro *coro_src = SvSTATE (src);
980		1113
981	if (coro->mainstack && coro->mainstack != main_mainstack)	1114	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
982	{
983	struct coro temp;
984		1115
985	PUTBACK;	1116	++coro_src->refcnt;
986	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1117	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
987	LOAD (aTHX_ coro);	1118	}
988	SPAGAIN;
989
990	destroy_stacks (aTHX);
991
992	LOAD ((&temp)); /* this will get rid of defsv etc.. */
993	SPAGAIN;
994
995	coro->mainstack = 0;
996	}
997
998	deallocate_stack (coro);
999	SvREFCNT_dec (coro->args);
1000	Safefree (coro);
1001		1119
1002	void	1120	void
		1121	_nonlocal_goto (IV nextop)
		1122	CODE:
		1123	/* uuh, somebody will kill me again for this */
		1124	PL_op->op_next = INT2PTR (OP *, nextop);
		1125
		1126	void
1003	_exit(code)	1127	_exit (code)
1004	int code	1128	int code
1005	PROTOTYPE: $	1129	PROTOTYPE: $
1006	CODE:	1130	CODE:
1007	_exit (code);	1131	_exit (code);
1008		1132
1009	MODULE = Coro::State PACKAGE = Coro::Cont
1010
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	void
1014	yield(...)
1015	PROTOTYPE: @
1016	CODE:
1017	SV *yieldstack;
1018	SV *sv;
1019	AV *defav = GvAV (PL_defgv);
1020	struct coro prev, next;
1021
1022	yieldstack = *hv_fetch (
1023	(HV *)SvRV (GvSV (coro_current)),
1024	"yieldstack", sizeof ("yieldstack") - 1,
1025	0
1026	);
1027
1028	/* set up @_ -- ugly */
1029	av_clear (defav);
1030	av_fill (defav, items - 1);
1031	while (items--)
1032	av_store (defav, items, SvREFCNT_inc (ST(items)));
1033
1034	sv = av_pop ((AV *)SvRV (yieldstack));
1035	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));
1036	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));
1037	SvREFCNT_dec (sv);
1038
1039	transfer (aTHX_ prev, next, 0);
1040
1041	MODULE = Coro::State PACKAGE = Coro	1133	MODULE = Coro::State PACKAGE = Coro
1042		1134
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1135	BOOT:
1046	{	1136	{
1047	int i;	1137	int i;
		1138
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1139	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1140
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1141	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1142	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1143	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1144	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1145	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1146	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056		1147
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1148	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1149	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059		1150
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1151	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1068	coroapi.ready = api_ready;	1159	coroapi.ready = api_ready;
1069	coroapi.nready = &coro_nready;	1160	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1161	coroapi.current = coro_current;
1071		1162
1072	GCoroAPI = &coroapi;	1163	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1164	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1165	SvREADONLY_on (sv);
1075	}	1166	}
1076	}	1167	}
1077		1168
1078	#if !PERL_MICRO	1169	int
		1170	prio (Coro::State coro, int newprio = 0)
		1171	ALIAS:
		1172	nice = 1
		1173	CODE:
		1174	{
		1175	RETVAL = coro->prio;
		1176
		1177	if (items > 1)
		1178	{
		1179	if (ix)
		1180	newprio += coro->prio;
		1181
		1182	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1183	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1184
		1185	coro->prio = newprio;
		1186	}
		1187	}
1079		1188
1080	void	1189	void
1081	ready(self)	1190	ready (SV *self)
1082	SV * self
1083	PROTOTYPE: $	1191	PROTOTYPE: $
1084	CODE:	1192	CODE:
1085	api_ready (self);	1193	api_ready (self);
1086		1194
1087	#endif
1088
1089	int	1195	int
1090	nready(...)	1196	nready (...)
1091	PROTOTYPE:	1197	PROTOTYPE:
1092	CODE:	1198	CODE:
1093	RETVAL = coro_nready;	1199	RETVAL = coro_nready;
1094	OUTPUT:	1200	OUTPUT:
1095	RETVAL	1201	RETVAL
1096		1202
1097	void	1203	MODULE = Coro::State PACKAGE = Coro::AIO
1098	schedule(...)
1099	PROTOTYPE:
1100	CODE:
1101	api_schedule ();
1102		1204
1103	void
1104	cede(...)
1105	PROTOTYPE:
1106	CODE:
1107	api_cede ();
1108
1109	# and these are hacks
1110	SV *	1205	SV *
1111	_aio_get_state ()	1206	_get_state ()
1112	CODE:	1207	CODE:
1113	{	1208	{
1114	struct {	1209	struct {
1115	int errorno;	1210	int errorno;
1116	int laststype;	1211	int laststype;
…		…
1127	}	1222	}
1128	OUTPUT:	1223	OUTPUT:
1129	RETVAL	1224	RETVAL
1130		1225
1131	void	1226	void
1132	_aio_set_state (char *data_)	1227	_set_state (char *data_)
1133	PROTOTYPE: $	1228	PROTOTYPE: $
1134	CODE:	1229	CODE:
1135	{	1230	{
1136	struct {	1231	struct {
1137	int errorno;	1232	int errorno;

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Comparing Coro/Coro/State.xs (file contents): Revision 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs. Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs.
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC