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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.85 by root, Fri Nov 24 00:32:04 2006 UTC vs.
Revision 1.95 by root, Sun Nov 26 17:35:42 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	/* this is a structure representing a perl-level coroutine */
104	struct coro {	104	struct coro {
105	/* the optional C context */	105	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	106	coro_stack *stack;
107	void *cursp;	107
		108	/* data associated with this coroutine (initial args) */
		109	AV *args;
108	int gencnt;	110	int refcnt;
109		111
110	/* optionally saved, might be zero */	112	/* optionally saved, might be zero */
111	AV *defav;	113	AV *defav;
112	SV *defsv;	114	SV *defsv;
113	SV *errsv;	115	SV *errsv;
…		…
143	OP **retstack;	145	OP **retstack;
144	I32 retstack_ix;	146	I32 retstack_ix;
145	I32 retstack_max;	147	I32 retstack_max;
146	PMOP *curpm;	148	PMOP *curpm;
147	COP *curcop;	149	COP *curcop;
148	JMPENV *top_env;
149		150
150	/* data associated with this coroutine (initial args) */	151	/* coro process data */
151	AV *args;	152	int prio;
152	};	153	};
153		154
154	typedef struct coro *Coro__State;	155	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	156	typedef struct coro *Coro__State_or_hashref;
156		157
…		…
299	PL_retstack_ix = c->retstack_ix;	300	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;	301	PL_retstack_max = c->retstack_max;
301	#endif	302	#endif
302	PL_curpm = c->curpm;	303	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;	304	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		305
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		309
…		…
427	c->retstack_ix = PL_retstack_ix;	427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;	428	c->retstack_max = PL_retstack_max;
429	#endif	429	#endif
430	c->curpm = PL_curpm;	430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;	431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	432	}
434		433
435	/*	434	/*
436	* allocate various perl stacks. This is an exact copy	435	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	436	* of perl.c:init_stacks, except that it uses less memory
…		…
531	Safefree (PL_retstack);	530	Safefree (PL_retstack);
532	#endif	531	#endif
533	}	532	}
534		533
535	static void	534	static void
536	allocate_stack (Coro__State ctx, int alloc)	535	setup_coro (struct coro *coro)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{
548	#if HAVE_MMAP
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{
553	# if STACKGUARD
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
555	# endif
556	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566
567	ctx->stack = stack;
568	}
569
570	static void
571	deallocate_stack (Coro__State ctx)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	536	{
598	/*	537	/*
599	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
600	*/	539	*/
601	dTHX;	540	dTHX;
602	dSP;	541	dSP;
603	Coro__State ctx = (Coro__State)arg;	542	UNOP myop;
604	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);	543	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
605		544
606	coro_init_stacks (aTHX);	545	coro_init_stacks (aTHX);
607	/PL_curcop = 0;/	546	/PL_curcop = 0;/
608	/PL_in_eval = PL_in_eval;/ /* inherit */	547	/PL_in_eval = PL_in_eval;/ /* inherit */
609	SvREFCNT_dec (GvAV (PL_defgv));	548	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	549	GvAV (PL_defgv) = coro->args; coro->args = 0;
611		550
612	SPAGAIN;	551	SPAGAIN;
613		552
614	if (ctx->stack)
615	{
616	ctx->cursp = 0;
617
618	PUSHMARK(SP);
619	PUTBACK;
620	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
621
622	if (SvTRUE (ERRSV))
623	croak (NULL);
624	else
625	croak ("FATAL: CCTXT coroutine returned!");
626	}
627	else
628	{
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);	553	Zero (&myop, 1, UNOP);
632	myop.op_next = Nullop;	554	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	555	myop.op_flags = OPf_WANT_VOID;
634		556
635	PL_op = (OP *)&myop;	557	PL_op = (OP *)&myop;
636		558
637	PUSHMARK(SP);	559	PUSHMARK(SP);
638	XPUSHs (sub_init);	560	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;	561	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;	563	SPAGAIN;
649		564
650	ENTER; /* necessary e.g. for dounwind */	565	ENTER; /* necessary e.g. for dounwind */
651	}
652	}	566	}
653		567
654	static void	568	static void
655	continue_coro (void *arg)	569	free_coro_mortal ()
656	{	570	{
657	/*
658	* this is a _very_ stripped down perl interpreter ;)
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662
663	PL_top_env = &PL_start_env;
664
665	ctx->cursp = 0;
666	PL_op = PL_op->op_next;
667	CALLRUNOPS(aTHX);
668
669	abort ();
670	}
671
672	/* never call directly, always through the coro_state_transfer global variable */
673	static void
674	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)
675	{
676	dSTACKLEVEL;
677
678	if (prev != next)
679	{
680	/* has this coro been created yet? */
681	if (next->mainstack)
682	{
683	LOCK;
684	SAVE (prev, flags);
685	LOAD (next);
686	UNLOCK;
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	prev->cursp = stacklevel;
716	/* don't add any code here */
717	}
718	else
719	next->cursp = stacklevel;
720	}
721	else if (next->tmps_ix == -2)
722	croak ("tried to transfer to running coroutine");
723	else
724	{
725	LOCK;
726	SAVE (prev, -1); /* first get rid of the old state */
727	UNLOCK;
728
729	/* create the coroutine for the first time */
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	/* the new coroutine starts with start_env again */
736	PL_top_env = &PL_start_env;
737
738	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739	{
740	setup_coro (next);
741	next->cursp = stacklevel;
742
743	prev->stack->refcnt++;
744	prev->stack->usecnt++;
745	next->stack = prev->stack;
746	next->gencnt = prev->gencnt;
747	}
748	else
749	{
750	assert (!next->stack);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	setup_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756	prev->cursp = stacklevel;
757	/* don't add any code here */
758	}
759	}
760	else
761	{
762	setup_coro (next);
763	next->cursp = stacklevel;
764	}
765	}
766	}
767
768	LOCK;
769	if (coro_mortal)	571	if (coro_mortal)
770	{	572	{
771	SvREFCNT_dec (coro_mortal);	573	SvREFCNT_dec (coro_mortal);
772	coro_mortal = 0;	574	coro_mortal = 0;
773	}	575	}
		576	}
		577
		578	static void
		579	coro_run (void *arg)
		580	{
		581	/*
		582	* this is a _very_ stripped down perl interpreter ;)
		583	*/
		584	dTHX;
		585	int ret;
		586
774	UNLOCK;	587	UNLOCK;
		588
		589	PL_top_env = &PL_start_env;
		590
		591	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
		592	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
		593
		594	/* continue at cctx_init, without entersub */
		595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		596
		597	/* somebody will hit me for both perl_run and PL_restartop */
		598	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
		599	printf ("ret %d\n", ret);//D
		600
		601	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		602	abort ();
		603	}
		604
		605	static coro_stack *
		606	stack_new ()
		607	{
		608	coro_stack *stack;
		609
		610	New (0, stack, 1, coro_stack);
		611
		612	#if HAVE_MMAP
		613
		614	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		615	/* mmap suppsedly does allocate-on-write for us */
		616	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		617
		618	if (stack->sptr == (void *)-1)
		619	{
		620	perror ("FATAL: unable to mmap stack for coroutine");
		621	_exit (EXIT_FAILURE);
		622	}
		623
		624	# if STACKGUARD
		625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		626	# endif
		627
		628	#else
		629
		630	stack->ssize = STACKSIZE * (long)sizeof (long);
		631	New (0, stack->sptr, STACKSIZE, long);
		632
		633	if (!stack->sptr)
		634	{
		635	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		636	_exit (EXIT_FAILURE);
		637	}
		638
		639	#endif
		640
		641	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		642
		643	return stack;
		644	}
		645
		646	static void
		647	stack_free (coro_stack *stack)
		648	{
		649	if (!stack)
		650	return;
		651
		652	#if HAVE_MMAP
		653	munmap (stack->sptr, stack->ssize);
		654	#else
		655	Safefree (stack->sptr);
		656	#endif
		657
		658	Safefree (stack);
		659	}
		660
		661	static coro_stack *stack_first;
		662
		663	static coro_stack *
		664	stack_get ()
		665	{
		666	coro_stack *stack;
		667
		668	if (stack_first)
		669	{
		670	stack = stack_first;
		671	stack_first = stack->next;
		672	}
		673	else
		674	{
		675	stack = stack_new ();
		676	PL_op = PL_op->op_next;
		677	}
		678
		679	return stack;
		680	}
		681
		682	static void
		683	stack_put (coro_stack *stack)
		684	{
		685	stack->next = stack_first;
		686	stack_first = stack;
		687	}
		688
		689	/* never call directly, always through the coro_state_transfer global variable */
		690	static void
		691	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)
		692	{
		693	dSTACKLEVEL;
		694
		695	/* sometimes transfer is only called to set idle_sp */
		696	if (flags == TRANSFER_SET_STACKLEVEL)
		697	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		698	else if (prev != next)
		699	{
		700	coro_stack *prev__stack;
		701
		702	LOCK;
		703
		704	if (next->mainstack)
		705	{
		706	/* coroutine already started */
		707	SAVE (prev, flags);
		708	LOAD (next);
		709	}
		710	else
		711	{
		712	/* need to start coroutine */
		713	/* first get rid of the old state */
		714	SAVE (prev, -1);
		715	/* setup coroutine call */
		716	setup_coro (next);
		717	/* need a stack */
		718	next->stack = 0;
		719	}
		720
		721	if (!prev->stack)
		722	/* create a new empty context */
		723	Newz (0, prev->stack, 1, coro_stack);
		724
		725	prev__stack = prev->stack;
		726
		727	/* possibly "free" the stack */
		728	if (prev__stack->idle_sp == STACKLEVEL)
		729	{
		730	stack_put (prev__stack);
		731	prev->stack = 0;
		732	}
		733
		734	if (!next->stack)
		735	next->stack = stack_get ();
		736
		737	if (prev__stack != next->stack)
		738	{
		739	prev__stack->top_env = PL_top_env;
		740	PL_top_env = next->stack->top_env;
		741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		742	}
		743
		744	free_coro_mortal ();
		745
		746	UNLOCK;
		747	}
775	}	748	}
776		749
777	/* use this function pointer to call the above function */	750	/* use this function pointer to call the above function */
778	/* this is done to increase chances of the compiler not inlining the call */	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 */
779	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	753	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
780		754
781	#define SV_CORO(sv,func) \	755	struct transfer_args
782	do { \	756	{
783	if (SvROK (sv)) \	757	struct coro prev, next;
784	sv = SvRV (sv); \	758	int flags;
785	\	759	};
786	if (SvTYPE (sv) == SVt_PVHV) \
787	{ \
788	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
789	\
790	if (!he) \
791	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
792	\
793	(sv) = SvRV (HeVAL(he)); \
794	} \
795	\
796	/* must also be changed inside Coro::Cont::yield */ \
797	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
798	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
799	\
800	} while(0)
801		760
802	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))	761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
803		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
804	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
805	api_transfer (pTHX_ SV prev, SV next, int flags)	842	api_transfer (SV prev, SV next, int flags)
806	{	843	{
807	SV_CORO (prev, "Coro::transfer");	844	dTHX;
808	SV_CORO (next, "Coro::transfer");	845	struct transfer_args ta;
809		846
810	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	847	prepare_transfer (aTHX_ &ta, prev, next, flags);
		848	TRANSFER (ta);
811	}	849	}
812		850
813	/ Coro ******************************************************************/	851	/ Coro ******************************************************************/
814		852
815	#define PRIO_MAX 3	853	#define PRIO_MAX 3
…		…
825	static int coro_nready;	863	static int coro_nready;
826		864
827	static void	865	static void
828	coro_enq (pTHX_ SV *sv)	866	coro_enq (pTHX_ SV *sv)
829	{	867	{
830	SV **xprio;
831	int prio;	868	int prio;
832		869
833	if (SvTYPE (sv) != SVt_PVHV)	870	if (SvTYPE (sv) != SVt_PVHV)
834	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");
835		872
836	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	873	prio = SvSTATE (sv)->prio;
837	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
838
839	prio = prio > PRIO_MAX ? PRIO_MAX
840	: prio < PRIO_MIN ? PRIO_MIN
841	: prio;
842		874
843	av_push (coro_ready [prio - PRIO_MIN], sv);	875	av_push (coro_ready [prio - PRIO_MIN], sv);
844	coro_nready++;	876	coro_nready++;
845	}	877	}
846		878
…		…
875	coro_enq (aTHX_ SvREFCNT_inc (coro));	907	coro_enq (aTHX_ SvREFCNT_inc (coro));
876	UNLOCK;	908	UNLOCK;
877	}	909	}
878		910
879	static void	911	static void
880	api_schedule (void)	912	prepare_schedule (aTHX_ struct transfer_args *ta)
881	{	913	{
882	dTHX;
883
884	SV prev, next;	914	SV current, prev, *next;
885		915
886	LOCK;	916	LOCK;
887		917
888	prev = SvRV (GvSV (coro_current));	918	current = GvSV (coro_current);
		919
		920	for (;;)
		921	{
		922	LOCK;
		923
889	next = coro_deq (aTHX_ PRIO_MIN);	924	next = coro_deq (aTHX_ PRIO_MIN);
890		925
891	if (!next)	926	if (next)
892	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;
893		948
894	/* free this only after the transfer */	949	/* free this only after the transfer */
		950	free_coro_mortal ();
895	coro_mortal = prev;	951	coro_mortal = prev;
896	SV_CORO (prev, "Coro::schedule");
897		952
898	SvRV (GvSV (coro_current)) = next;	953	ta->prev = SvSTATE (prev);
899		954	ta->next = SvSTATE (next);
900	SV_CORO (next, "Coro::schedule");	955	ta->flags = TRANSFER_SAVE_ALL;
901		956
902	UNLOCK;	957	UNLOCK;
903
904	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
905	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
906	}	958	}
907		959
908	static void	960	static void
909	api_cede (void)	961	prepare_cede (aTHX_ struct transfer_args *ta)
910	{	962	{
911	dTHX;
912
913	LOCK;	963	LOCK;
914	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
915	UNLOCK;	965	UNLOCK;
916		966
		967	prepare_schedule (ta);
		968	}
		969
		970	static void
917	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);
918	}	988	}
919		989
920	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
921		991
922	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
923		993
924	BOOT:	994	BOOT:
925	{ /* {} necessary for stoopid perl-5.6.x */	995	{
926	#ifdef USE_ITHREADS	996	#ifdef USE_ITHREADS
927	MUTEX_INIT (&coro_mutex);	997	MUTEX_INIT (&coro_mutex);
928	#endif	998	#endif
929	BOOT_PAGESIZE;	999	BOOT_PAGESIZE;
930		1000
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		1002
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
939		1006
940	main_mainstack = PL_mainstack;	1007	main_mainstack = PL_mainstack;
941		1008
942	coroapi.ver = CORO_API_VERSION;	1009	coroapi.ver = CORO_API_VERSION;
943	coroapi.transfer = api_transfer;	1010	coroapi.transfer = api_transfer;
944	}
945		1011
946	Coro::State	1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
947	_newprocess(args)	1013	}
948	SV * args	1014
949	PROTOTYPE: $	1015	SV *
		1016	new (char *klass, ...)
950	CODE:	1017	CODE:
951	Coro__State coro;	1018	{
		1019	struct coro *coro;
		1020	HV *hv;
		1021	int i;
952		1022
953	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
954	croak ("Coro::State::_newprocess expects an arrayref");
955
956	Newz (0, coro, 1, struct coro);	1023	Newz (0, coro, 1, struct coro);
		1024	coro->args = newAV ();
957		1025
958	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1026	hv = newHV ();
		1027	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1029
		1030	for (i = 1; i < items; i++)
		1031	av_push (coro->args, newSVsv (ST (i)));
		1032
959	/coro->mainstack = 0; //actual work is done inside transfer /	1033	/coro->mainstack = 0; //actual work is done inside transfer /
960	/coro->stack = 0;/	1034	/coro->stack = 0;/
961		1035	}
962	RETVAL = coro;
963	OUTPUT:	1036	OUTPUT:
964	RETVAL	1037	RETVAL
965		1038
966	void	1039	void
967	transfer(prev, next, flags)	1040	_set_stacklevel (...)
968	SV *prev	1041	ALIAS:
969	SV *next	1042	Coro::State::transfer = 1
970	int flags	1043	Coro::schedule = 2
971	PROTOTYPE: @	1044	Coro::cede = 3
		1045	Coro::Cont::yield = 4
972	CODE:	1046	CODE:
973	PUTBACK;	1047	{
974	SV_CORO (next, "Coro::transfer");	1048	struct transfer_args ta;
975	SV_CORO (prev, "Coro::transfer");	1049
976	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1050	switch (ix)
977	SPAGAIN;	1051	{
		1052	case 0:
		1053	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
		1054	ta.next = 0;
		1055	ta.flags = TRANSFER_SET_STACKLEVEL;
		1056	break;
		1057
		1058	case 1:
		1059	if (items != 3)
		1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1061
		1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1063	break;
		1064
		1065	case 2:
		1066	prepare_schedule (&ta);
		1067	break;
		1068
		1069	case 3:
		1070	prepare_cede (&ta);
		1071	break;
		1072
		1073	case 4:
		1074	{
		1075	SV *yieldstack;
		1076	SV *sv;
		1077	AV *defav = GvAV (PL_defgv);
		1078
		1079	yieldstack = *hv_fetch (
		1080	(HV *)SvRV (GvSV (coro_current)),
		1081	"yieldstack", sizeof ("yieldstack") - 1,
		1082	0
		1083	);
		1084
		1085	/* set up @_ -- ugly */
		1086	av_clear (defav);
		1087	av_fill (defav, items - 1);
		1088	while (items--)
		1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1090
		1091	sv = av_pop ((AV *)SvRV (yieldstack));
		1092	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
		1093	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
		1094	ta.flags = 0;
		1095	SvREFCNT_dec (sv);
		1096	}
		1097	break;
		1098
		1099	}
		1100
		1101	TRANSFER (ta);
		1102	}
978		1103
979	void	1104	void
980	DESTROY(coro)	1105	_clone_state_from (SV dst, SV src)
981	Coro::State coro	1106	CODE:
982	CODE:	1107	{
		1108	struct coro *coro_src = SvSTATE (src);
983		1109
984	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
985	{
986	struct coro temp;
987		1111
988	PUTBACK;	1112	++coro_src->refcnt;
989	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
990	LOAD (aTHX_ coro);	1114	}
991	SPAGAIN;
992
993	destroy_stacks (aTHX);
994
995	LOAD ((&temp)); /* this will get rid of defsv etc.. */
996	SPAGAIN;
997
998	coro->mainstack = 0;
999	}
1000
1001	deallocate_stack (coro);
1002	SvREFCNT_dec (coro->args);
1003	Safefree (coro);
1004		1115
1005	void	1116	void
		1117	_nonlocal_goto (IV nextop)
		1118	CODE:
		1119	/* uuh, somebody will kill me again for this */
		1120	PL_op->op_next = INT2PTR (OP *, nextop);
		1121
		1122	void
1006	_exit(code)	1123	_exit (code)
1007	int code	1124	int code
1008	PROTOTYPE: $	1125	PROTOTYPE: $
1009	CODE:	1126	CODE:
1010	_exit (code);	1127	_exit (code);
1011		1128
1012	MODULE = Coro::State PACKAGE = Coro::Cont
1013
1014	void
1015	yield(...)
1016	PROTOTYPE: @
1017	CODE:
1018	SV *yieldstack;
1019	SV *sv;
1020	AV *defav = GvAV (PL_defgv);
1021	struct coro prev, next;
1022
1023	yieldstack = *hv_fetch (
1024	(HV *)SvRV (GvSV (coro_current)),
1025	"yieldstack", sizeof ("yieldstack") - 1,
1026	0
1027	);
1028
1029	/* set up @_ -- ugly */
1030	av_clear (defav);
1031	av_fill (defav, items - 1);
1032	while (items--)
1033	av_store (defav, items, SvREFCNT_inc (ST(items)));
1034
1035	sv = av_pop ((AV *)SvRV (yieldstack));
1036	prev = SvSTATE ((SV)SvRV (av_fetch ((AV *)SvRV (sv), 0, 0)));
1037	next = SvSTATE ((SV)SvRV (av_fetch ((AV *)SvRV (sv), 1, 0)));
1038	SvREFCNT_dec (sv);
1039
1040	coro_state_transfer (aTHX_ prev, next, 0);
1041
1042	MODULE = Coro::State PACKAGE = Coro	1129	MODULE = Coro::State PACKAGE = Coro
1043		1130
1044	BOOT:	1131	BOOT:
1045	{	1132	{
1046	int i;	1133	int i;
		1134
1047	HV *stash = gv_stashpv ("Coro", TRUE);	1135	coro_stash = gv_stashpv ("Coro", TRUE);
1048		1136
1049	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1050	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1051	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1052	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1053	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1054	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1055		1143
1056	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1057	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1058		1146
1059	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1072	sv_setiv (sv, (IV)&coroapi);	1160	sv_setiv (sv, (IV)&coroapi);
1073	SvREADONLY_on (sv);	1161	SvREADONLY_on (sv);
1074	}	1162	}
1075	}	1163	}
1076		1164
1077	#if !PERL_MICRO	1165	int
		1166	prio (Coro::State coro, int newprio = 0)
		1167	ALIAS:
		1168	nice = 1
		1169	CODE:
		1170	{
		1171	RETVAL = coro->prio;
		1172
		1173	if (items > 1)
		1174	{
		1175	if (ix)
		1176	newprio += coro->prio;
		1177
		1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1180
		1181	coro->prio = newprio;
		1182	}
		1183	}
1078		1184
1079	void	1185	void
1080	ready(self)	1186	ready (SV *self)
1081	SV * self
1082	PROTOTYPE: $	1187	PROTOTYPE: $
1083	CODE:	1188	CODE:
1084	api_ready (self);	1189	api_ready (self);
1085		1190
1086	#endif
1087
1088	int	1191	int
1089	nready(...)	1192	nready (...)
1090	PROTOTYPE:	1193	PROTOTYPE:
1091	CODE:	1194	CODE:
1092	RETVAL = coro_nready;	1195	RETVAL = coro_nready;
1093	OUTPUT:	1196	OUTPUT:
1094	RETVAL	1197	RETVAL
1095		1198
1096	void	1199	MODULE = Coro::State PACKAGE = Coro::AIO
1097	schedule(...)
1098	PROTOTYPE:
1099	CODE:
1100	api_schedule ();
1101		1200
1102	void
1103	cede(...)
1104	PROTOTYPE:
1105	CODE:
1106	api_cede ();
1107
1108	# and these are hacks
1109	SV *	1201	SV *
1110	_aio_get_state ()	1202	_get_state ()
1111	CODE:	1203	CODE:
1112	{	1204	{
1113	struct {	1205	struct {
1114	int errorno;	1206	int errorno;
1115	int laststype;	1207	int laststype;
…		…
1126	}	1218	}
1127	OUTPUT:	1219	OUTPUT:
1128	RETVAL	1220	RETVAL
1129		1221
1130	void	1222	void
1131	_aio_set_state (char *data_)	1223	_set_state (char *data_)
1132	PROTOTYPE: $	1224	PROTOTYPE: $
1133	CODE:	1225	CODE:
1134	{	1226	{
1135	struct {	1227	struct {
1136	int errorno;	1228	int errorno;

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Comparing Coro/Coro/State.xs (file contents): Revision 1.85 by root, Fri Nov 24 00:32:04 2006 UTC vs. Revision 1.95 by root, Sun Nov 26 17:35:42 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.85 by root, Fri Nov 24 00:32:04 2006 UTC vs.
Revision 1.95 by root, Sun Nov 26 17:35:42 2006 UTC