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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.93 by root, Sun Nov 26 03:22:50 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))	71	#define labs(l) ((l) >= 0 ? (l) : -(l))
73		72
74	#include "CoroAPI.h"	73	#include "CoroAPI.h"
		74
		75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
75		76
76	#ifdef USE_ITHREADS	77	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	78	static perl_mutex coro_mutex;
78	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
82	# define UNLOCK (void)0	83	# define UNLOCK (void)0
83	#endif	84	#endif
84		85
85	static struct CoroAPI coroapi;	86	static struct CoroAPI coroapi;
86	static AV main_mainstack; / used to differentiate between $main and others */	87	static AV main_mainstack; / used to differentiate between $main and others */
87	static HV *coro_state_stash;	88	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 */	89	static SV coro_mortal; / will be freed after next transfer */
91		90
92	/* this is actually not only the c stack but also c registers etc... */	91	/* this is a structure representing a c-level coroutine */
93	typedef struct {	92	typedef struct coro_stack {
94	int refcnt; /* pointer reference counter */	93	struct coro_stack *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		94
98	coro_context cctx;	95	/* the stack */
99
100	void *sptr;	96	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	97	long ssize; /* positive == mmap, otherwise malloc */
		98
		99	/* cpu state */
		100	void idle_sp; / original stacklevel when coroutine was created */
		101	JMPENV *top_env;
		102	coro_context cctx;
102	} coro_stack;	103	} coro_stack;
103		104
		105	/* the (fake) coro_stack representing the main program */
		106	static coro_stack *main_stack;
		107
		108	/* this is a structure representing a perl-level coroutine */
104	struct coro {	109	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	110	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;
107
108	/* the optional C context */
109	coro_stack *stack;	111	coro_stack *stack;
110	void *cursp;	112
		113	/* data associated with this coroutine (initial args) */
		114	AV *args;
111	int gencnt;	115	int refcnt;
112		116
113	/* optionally saved, might be zero */	117	/* optionally saved, might be zero */
114	AV *defav;	118	AV *defav;
115	SV *defsv;	119	SV *defsv;
116	SV *errsv;	120	SV *errsv;
…		…
146	OP **retstack;	150	OP **retstack;
147	I32 retstack_ix;	151	I32 retstack_ix;
148	I32 retstack_max;	152	I32 retstack_max;
149	PMOP *curpm;	153	PMOP *curpm;
150	COP *curcop;	154	COP *curcop;
151	JMPENV *top_env;
152		155
153	/* data associated with this coroutine (initial args) */	156	/* coro process data */
154	AV *args;	157	int prio;
155	};	158	};
156		159
157	typedef struct coro *Coro__State;	160	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	161	typedef struct coro *Coro__State_or_hashref;
159		162
…		…
302	PL_retstack_ix = c->retstack_ix;	305	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;	306	PL_retstack_max = c->retstack_max;
304	#endif	307	#endif
305	PL_curpm = c->curpm;	308	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;	309	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308		310
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	313	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
312		314
…		…
430	c->retstack_ix = PL_retstack_ix;	432	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;	433	c->retstack_max = PL_retstack_max;
432	#endif	434	#endif
433	c->curpm = PL_curpm;	435	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;	436	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
436	}	437	}
437		438
438	/*	439	/*
439	* allocate various perl stacks. This is an exact copy	440	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	441	* of perl.c:init_stacks, except that it uses less memory
…		…
534	Safefree (PL_retstack);	535	Safefree (PL_retstack);
535	#endif	536	#endif
536	}	537	}
537		538
538	static void	539	static void
539	allocate_stack (Coro__State ctx, int alloc)	540	setup_coro (struct coro *coro)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{
551	#if HAVE_MMAP
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
554	if (stack->sptr != (void *)-1)
555	{
556	# if STACKGUARD
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
558	# endif
559	}
560	else
561	#endif
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569
570	ctx->stack = stack;
571	}
572
573	static void
574	deallocate_stack (Coro__State ctx)
575	{
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590
591	Safefree (stack);
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}
597
598	static void
599	setup_coro (void *arg)
600	{	541	{
601	/*	542	/*
602	* emulate part of the perl startup here.	543	* emulate part of the perl startup here.
603	*/	544	*/
604	dTHX;	545	dTHX;
605	dSP;	546	dSP;
606	Coro__State ctx = (Coro__State)arg;	547	UNOP myop;
607	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);	548	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
608		549
609	coro_init_stacks (aTHX);	550	coro_init_stacks (aTHX);
610	/PL_curcop = 0;/	551	/PL_curcop = 0;/
611	/PL_in_eval = PL_in_eval;/ /* inherit */	552	/PL_in_eval = PL_in_eval;/ /* inherit */
612	SvREFCNT_dec (GvAV (PL_defgv));	553	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	554	GvAV (PL_defgv) = coro->args; coro->args = 0;
614		555
615	SPAGAIN;	556	SPAGAIN;
616		557
617	if (ctx->stack)
618	{
619	ctx->cursp = 0;
620
621	PUSHMARK(SP);
622	PUTBACK;
623	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
624
625	if (SvTRUE (ERRSV))
626	croak (NULL);
627	else
628	croak ("FATAL: CCTXT coroutine returned!");
629	}
630	else
631	{
632	UNOP myop;
633
634	PL_op = (OP *)&myop;
635
636	Zero(&myop, 1, UNOP);	558	Zero (&myop, 1, UNOP);
637	myop.op_next = Nullop;	559	myop.op_next = Nullop;
638	myop.op_flags = OPf_WANT_VOID;	560	myop.op_flags = OPf_WANT_VOID;
639		561
		562	PL_op = (OP *)&myop;
		563
640	PUSHMARK(SP);	564	PUSHMARK(SP);
641	XPUSHs (sub_init);	565	XPUSHs (sub_init);
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;	566	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;	568	SPAGAIN;
652		569
653	ENTER; /* necessary e.g. for dounwind */	570	ENTER; /* necessary e.g. for dounwind */
654	}
655	}	571	}
656		572
657	static void	573	static void
658	continue_coro (void *arg)	574	free_coro_mortal ()
659	{	575	{
660	/*
661	* this is a _very_ stripped down perl interpreter ;)
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665
666	PL_top_env = &ctx->start_env;
667
668	ctx->cursp = 0;
669	PL_op = PL_op->op_next;
670	CALLRUNOPS(aTHX);
671
672	abort ();
673	}
674
675	static void
676	transfer (pTHX_ struct coro prev, struct coro next, int flags)
677	{
678	dSTACKLEVEL;
679
680	if (prev != next)
681	{
682	if (next->mainstack)
683	{
684	LOCK;
685	SAVE (prev, flags);
686	LOAD (next);
687	UNLOCK;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}
722	else if (next->tmps_ix == -2)
723	croak ("tried to transfer to running coroutine");
724	else
725	{
726	LOCK;
727	SAVE (prev, -1); /* first get rid of the old state */
728	UNLOCK;
729
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
738
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}
765	}
766
767	LOCK;
768	if (coro_mortal)	576	if (coro_mortal)
769	{	577	{
770	SvREFCNT_dec (coro_mortal);	578	SvREFCNT_dec (coro_mortal);
771	coro_mortal = 0;	579	coro_mortal = 0;
772	}	580	}
		581	}
		582
		583	static void
		584	coro_run (void *arg)
		585	{
		586	/*
		587	* this is a _very_ stripped down perl interpreter ;)
		588	*/
		589	dTHX;
		590
773	UNLOCK;	591	UNLOCK;
774	}
775		592
776	#define SV_CORO(sv,func) \	593	PL_top_env = &PL_start_env;
777	do { \
778	if (SvROK (sv)) \
779	sv = SvRV (sv); \
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		594
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
		596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
798		597
		598	/* continue at cctx_init, without entersub */
		599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		600
		601	/* somebody will hit me for both perl_run and PL_restart_op */
		602	perl_run (aTHX_ PERL_GET_CONTEXT);
		603
		604	abort ();
		605	}
		606
		607	static coro_stack *
		608	stack_new ()
		609	{
		610	coro_stack *stack;
		611
		612	New (0, stack, 1, coro_stack);
		613
		614	#if HAVE_MMAP
		615
		616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
		617	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		618
		619	if (stack->sptr == (void *)-1)
		620	{
		621	perror ("FATAL: unable to mmap stack for coroutine");
		622	_exit (EXIT_FAILURE);
		623	}
		624
		625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		626
		627	#else
		628
		629	stack->ssize = STACKSIZE * (long)sizeof (long);
		630	New (0, stack->sptr, STACKSIZE, long);
		631
		632	if (!stack->sptr)
		633	{
		634	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		635	_exit (EXIT_FAILURE);
		636	}
		637
		638	#endif
		639
		640	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		641
		642	return stack;
		643	}
		644
		645	static void
		646	stack_free (coro_stack *stack)
		647	{
		648	if (!stack \|\| stack == main_stack)
		649	return;
		650
		651	#if HAVE_MMAP
		652	munmap (stack->sptr, stack->ssize);
		653	#else
		654	Safefree (stack->sptr);
		655	#endif
		656
		657	Safefree (stack);
		658	}
		659
		660	static coro_stack *stack_first;
		661
		662	static coro_stack *
		663	stack_get ()
		664	{
		665	coro_stack *stack;
		666
		667	if (stack_first)
		668	{
		669	stack = stack_first;
		670	stack_first = stack->next;
		671	}
		672	else
		673	{
		674	stack = stack_new ();
		675	PL_op = PL_op->op_next;
		676	}
		677
		678	return stack;
		679	}
		680
		681	static void
		682	stack_put (coro_stack *stack)
		683	{
		684	stack->next = stack_first;
		685	stack_first = stack;
		686	}
		687
		688	/* never call directly, always through the coro_state_transfer global variable */
		689	static void
		690	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)
		691	{
		692	dSTACKLEVEL;
		693
		694	/* sometimes transfer is only called to set idle_sp */
		695	if (flags == TRANSFER_SET_STACKLEVEL)
		696	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		697	else if (prev != next)
		698	{
		699	coro_stack *prev__stack;
		700
		701	LOCK;
		702
		703	if (next->mainstack)
		704	{
		705	/* coroutine already started */
		706	SAVE (prev, flags);
		707	LOAD (next);
		708	}
		709	else
		710	{
		711	/* need to start coroutine */
		712	/* first get rid of the old state */
		713	SAVE (prev, -1);
		714	/* setup coroutine call */
		715	setup_coro (next);
		716	/* need a stack */
		717	next->stack = 0;
		718	}
		719
		720	prev__stack = prev->stack;
		721
		722	/* possibly "free" the stack */
		723	if (prev__stack->idle_sp == STACKLEVEL)
		724	{
		725	stack_put (prev__stack);
		726	prev->stack = 0;
		727	}
		728
		729	if (!next->stack)
		730	next->stack = stack_get ();
		731
		732	if (prev__stack != next->stack)
		733	{
		734	prev__stack->top_env = PL_top_env;
		735	PL_top_env = next->stack->top_env;
		736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		737	}
		738
		739	free_coro_mortal ();
		740
		741	UNLOCK;
		742	}
		743	}
		744
		745	/* use this function pointer to call the above function */
		746	/* this is done to increase chances of the compiler not inlining the call */
		747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		748	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
		749
		750	struct transfer_args
		751	{
		752	struct coro prev, next;
		753	int flags;
		754	};
		755
		756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		757
		758	static void
		759	coro_state_destroy (struct coro *coro)
		760	{
		761	if (coro->refcnt--)
		762	return;
		763
		764	if (coro->mainstack && coro->mainstack != main_mainstack)
		765	{
		766	struct coro temp;
		767
		768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		769	LOAD (aTHX_ coro);
		770
		771	destroy_stacks (aTHX);
		772
		773	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		774
		775	coro->mainstack = 0;
		776	}
		777
		778	stack_free (coro->stack);
		779	SvREFCNT_dec (coro->args);
		780	Safefree (coro);
		781	}
		782
799	static void	783	static int
		784	coro_state_clear (SV sv, MAGIC mg)
		785	{
		786	struct coro coro = (struct coro )mg->mg_ptr;
		787	mg->mg_ptr = 0;
		788
		789	coro_state_destroy (coro);
		790
		791	return 0;
		792	}
		793
		794	static int
		795	coro_state_dup (MAGIC mg, CLONE_PARAMS params)
		796	{
		797	struct coro coro = (struct coro )mg->mg_ptr;
		798
		799	++coro->refcnt;
		800
		801	return 0;
		802	}
		803
		804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		805
		806	static struct coro *
		807	SvSTATE (SV *coro)
		808	{
		809	HV *stash;
		810	MAGIC *mg;
		811
		812	if (SvROK (coro))
		813	coro = SvRV (coro);
		814
		815	stash = SvSTASH (coro);
		816	if (stash != coro_stash && stash != coro_state_stash)
		817	{
		818	/* very slow, but rare, check */
		819	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		820	croak ("Coro::State object required");
		821	}
		822
		823	mg = SvMAGIC (coro);
		824	assert (mg->mg_type == PERL_MAGIC_ext);
		825	return (struct coro *)mg->mg_ptr;
		826	}
		827
		828	static void
		829	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)
		830	{
		831	ta->prev = SvSTATE (prev);
		832	ta->next = SvSTATE (next);
		833	ta->flags = flags;
		834	}
		835
		836	static void
800	api_transfer(pTHX_ SV prev, SV next, int flags)	837	api_transfer (SV prev, SV next, int flags)
801	{	838	{
802	SV_CORO (prev, "Coro::transfer");	839	dTHX;
803	SV_CORO (next, "Coro::transfer");	840	struct transfer_args ta;
804		841
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	842	prepare_transfer (aTHX_ &ta, prev, next, flags);
		843	TRANSFER (ta);
806	}	844	}
807		845
808	/ Coro ******************************************************************/	846	/ Coro ******************************************************************/
809		847
810	#define PRIO_MAX 3	848	#define PRIO_MAX 3
…		…
814	#define PRIO_IDLE -3	852	#define PRIO_IDLE -3
815	#define PRIO_MIN -4	853	#define PRIO_MIN -4
816		854
817	/* for Coro.pm */	855	/* for Coro.pm */
818	static GV coro_current, coro_idle;	856	static GV coro_current, coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;	858	static int coro_nready;
821		859
822	static void	860	static void
823	coro_enq (pTHX_ SV *sv)	861	coro_enq (pTHX_ SV *sv)
824	{	862	{
825	SV **xprio;
826	int prio;	863	int prio;
827		864
828	if (SvTYPE (sv) != SVt_PVHV)	865	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");	866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830		867
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	868	prio = SvSTATE (sv)->prio;
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837		869
838	av_push (coro_ready [prio - PRIO_MIN], sv);	870	av_push (coro_ready [prio - PRIO_MIN], sv);
839	coro_nready++;	871	coro_nready++;
840	}	872	}
841		873
…		…
847	min_prio -= PRIO_MIN;	879	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	880	if (min_prio < 0)
849	min_prio = 0;	881	min_prio = 0;
850		882
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	883	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	884	if (AvFILLp (coro_ready [prio]) >= 0)
853	{	885	{
854	coro_nready--;	886	coro_nready--;
855	return av_shift (coro_ready[prio]);	887	return av_shift (coro_ready [prio]);
856	}	888	}
857		889
858	return 0;	890	return 0;
859	}	891	}
860		892
…		…
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	902	coro_enq (aTHX_ SvREFCNT_inc (coro));
871	UNLOCK;	903	UNLOCK;
872	}	904	}
873		905
874	static void	906	static void
875	api_schedule (void)	907	prepare_schedule (aTHX_ struct transfer_args *ta)
876	{	908	{
877	dTHX;
878
879	SV prev, next;	909	SV current, prev, *next;
880		910
881	LOCK;	911	LOCK;
882		912
883	prev = SvRV (GvSV (coro_current));	913	current = GvSV (coro_current);
		914
		915	for (;;)
		916	{
		917	LOCK;
		918
884	next = coro_deq (aTHX_ PRIO_MIN);	919	next = coro_deq (aTHX_ PRIO_MIN);
885		920
886	if (!next)	921	if (next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	922	break;
		923
		924	UNLOCK;
		925
		926	{
		927	dSP;
		928
		929	ENTER;
		930	SAVETMPS;
		931
		932	PUSHMARK (SP);
		933	PUTBACK;
		934	call_sv (GvSV (coro_idle), G_DISCARD);
		935
		936	FREETMPS;
		937	LEAVE;
		938	}
		939	}
		940
		941	prev = SvRV (current);
		942	SvRV (current) = next;
888		943
889	/* free this only after the transfer */	944	/* free this only after the transfer */
		945	free_coro_mortal ();
890	coro_mortal = prev;	946	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892		947
893	SvRV (GvSV (coro_current)) = next;	948	ta->prev = SvSTATE (prev);
894		949	ta->next = SvSTATE (next);
895	SV_CORO (next, "Coro::schedule");	950	ta->flags = TRANSFER_SAVE_ALL;
896		951
897	UNLOCK;	952	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
901	}	953	}
902		954
903	static void	955	static void
904	api_cede (void)	956	prepare_cede (aTHX_ struct transfer_args *ta)
905	{	957	{
906	dTHX;
907
908	LOCK;	958	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;	960	UNLOCK;
911		961
		962	prepare_schedule (ta);
		963	}
		964
		965	static void
912	api_schedule ();	966	api_schedule (void)
		967	{
		968	dTHX;
		969	struct transfer_args ta;
		970
		971	prepare_schedule (&ta);
		972	TRANSFER (ta);
		973	}
		974
		975	static void
		976	api_cede (void)
		977	{
		978	dTHX;
		979	struct transfer_args ta;
		980
		981	prepare_cede (&ta);
		982	TRANSFER (ta);
913	}	983	}
914		984
915	MODULE = Coro::State PACKAGE = Coro::State	985	MODULE = Coro::State PACKAGE = Coro::State
916		986
917	PROTOTYPES: ENABLE	987	PROTOTYPES: DISABLE
918		988
919	BOOT:	989	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	990	{
921	#ifdef USE_ITHREADS	991	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	992	MUTEX_INIT (&coro_mutex);
923	#endif	993	#endif
924	BOOT_PAGESIZE;	994	BOOT_PAGESIZE;
925		995
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		997
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1000	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
934		1001
935	main_mainstack = PL_mainstack;	1002	main_mainstack = PL_mainstack;
936		1003
937	coroapi.ver = CORO_API_VERSION;	1004	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1005	coroapi.transfer = api_transfer;
939	}
940		1006
941	Coro::State	1007	Newz (0, main_stack, 1, coro_stack);
942	_newprocess(args)	1008	main_stack->idle_sp = (void *)-1;
943	SV * args	1009
944	PROTOTYPE: $	1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1011	}
		1012
		1013	SV *
		1014	new (char *klass, ...)
945	CODE:	1015	CODE:
946	Coro__State coro;	1016	{
		1017	struct coro *coro;
		1018	HV *hv;
		1019	int i;
947		1020
948	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1021	Newz (0, coro, 1, struct coro);
		1022	coro->args = newAV ();
952		1023
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1024	hv = newHV ();
		1025	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1027
		1028	for (i = 1; i < items; i++)
		1029	av_push (coro->args, newSVsv (ST (i)));
		1030
		1031	coro->stack = main_stack;
954	/coro->mainstack = 0; //actual work is done inside transfer /	1032	/coro->mainstack = 0; //actual work is done inside transfer /
955	/coro->stack = 0;/	1033	/coro->stack = 0;/
956		1034	}
957	/* same as JMPENV_BOOTSTRAP */
958	/* we might be able to recycle start_env, but safe is safe */
959	/Zero(&coro->start_env, 1, JMPENV);/
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962
963	RETVAL = coro;
964	OUTPUT:	1035	OUTPUT:
965	RETVAL	1036	RETVAL
966		1037
967	void	1038	void
968	transfer(prev, next, flags)	1039	transfer (...)
969	SV *prev	1040	ALIAS:
970	SV *next	1041	Coro::schedule = 1
971	int flags	1042	Coro::cede = 2
972	PROTOTYPE: @	1043	_set_stacklevel = 3
973	CODE:	1044	CODE:
974	PUTBACK;	1045	{
975	SV_CORO (next, "Coro::transfer");	1046	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1047
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1048	switch (ix)
978	SPAGAIN;	1049	{
		1050	case 0:
		1051	if (items != 3)
		1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1053
		1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1055	break;
		1056
		1057	case 1:
		1058	prepare_schedule (&ta);
		1059	break;
		1060
		1061	case 2:
		1062	prepare_cede (&ta);
		1063	break;
		1064
		1065	case 3:
		1066	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
		1067	ta.next = 0;
		1068	ta.flags = TRANSFER_SET_STACKLEVEL;
		1069	break;
		1070	}
		1071
		1072	TRANSFER (ta);
		1073	}
979		1074
980	void	1075	void
981	DESTROY(coro)	1076	_clone_state_from (SV dst, SV src)
982	Coro::State coro	1077	CODE:
983	CODE:	1078	{
		1079	struct coro *coro_src = SvSTATE (src);
984		1080
985	if (coro->mainstack && coro->mainstack != main_mainstack)	1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
986	{
987	struct coro temp;
988		1082
989	PUTBACK;	1083	++coro_src->refcnt;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
991	LOAD (aTHX_ coro);	1085	}
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005		1086
1006	void	1087	void
		1088	_nonlocal_goto (IV nextop)
		1089	CODE:
		1090	/* uuh, somebody will kill me again for this */
		1091	PL_op->op_next = INT2PTR (OP *, nextop);
		1092
		1093	void
1007	_exit(code)	1094	_exit (code)
1008	int code	1095	int code
1009	PROTOTYPE: $	1096	PROTOTYPE: $
1010	CODE:	1097	CODE:
1011	_exit (code);	1098	_exit (code);
1012		1099
1013	MODULE = Coro::State PACKAGE = Coro::Cont	1100	MODULE = Coro::State PACKAGE = Coro::Cont
1014		1101
1015	# this is slightly dirty (should expose a c-level api)
1016
1017	void	1102	void
1018	yield(...)	1103	yield (...)
1019	PROTOTYPE: @	1104	PROTOTYPE: @
1020	CODE:	1105	CODE:
		1106	{
1021	SV *yieldstack;	1107	SV *yieldstack;
1022	SV *sv;	1108	SV *sv;
1023	AV *defav = GvAV (PL_defgv);	1109	AV *defav = GvAV (PL_defgv);
1024	struct coro prev, next;	1110	struct coro prev, next;
1025		1111
…		…
1034	av_fill (defav, items - 1);	1120	av_fill (defav, items - 1);
1035	while (items--)	1121	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));	1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037		1123
1038	sv = av_pop ((AV *)SvRV (yieldstack));	1124	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));	1125	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1040	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));	1126	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1041	SvREFCNT_dec (sv);	1127	SvREFCNT_dec (sv);
1042		1128
1043	transfer (aTHX_ prev, next, 0);	1129	coro_state_transfer (aTHX_ prev, next, 0);
		1130	}
1044		1131
1045	MODULE = Coro::State PACKAGE = Coro	1132	MODULE = Coro::State PACKAGE = Coro
1046		1133
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1134	BOOT:
1050	{	1135	{
1051	int i;	1136	int i;
		1137
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1138	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1139
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1140	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1141	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060		1146
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1149
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1072	coroapi.ready = api_ready;	1158	coroapi.ready = api_ready;
1073	coroapi.nready = &coro_nready;	1159	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1160	coroapi.current = coro_current;
1075		1161
1076	GCoroAPI = &coroapi;	1162	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1163	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1164	SvREADONLY_on (sv);
1079	}	1165	}
1080	}	1166	}
1081		1167
1082	#if !PERL_MICRO	1168	int
		1169	prio (Coro::State coro, int newprio = 0)
		1170	ALIAS:
		1171	nice = 1
		1172	CODE:
		1173	{
		1174	RETVAL = coro->prio;
		1175
		1176	if (items > 1)
		1177	{
		1178	if (ix)
		1179	newprio += coro->prio;
		1180
		1181	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1182	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1183
		1184	coro->prio = newprio;
		1185	}
		1186	}
1083		1187
1084	void	1188	void
1085	ready(self)	1189	ready (SV *self)
1086	SV * self
1087	PROTOTYPE: $	1190	PROTOTYPE: $
1088	CODE:	1191	CODE:
1089	api_ready (self);	1192	api_ready (self);
1090		1193
1091	#endif
1092
1093	int	1194	int
1094	nready(...)	1195	nready (...)
1095	PROTOTYPE:	1196	PROTOTYPE:
1096	CODE:	1197	CODE:
1097	RETVAL = coro_nready;	1198	RETVAL = coro_nready;
1098	OUTPUT:	1199	OUTPUT:
1099	RETVAL	1200	RETVAL
1100		1201
1101	void	1202	MODULE = Coro::State PACKAGE = Coro::AIO
1102	schedule(...)
1103	PROTOTYPE:
1104	CODE:
1105	api_schedule ();
1106		1203
1107	void
1108	cede(...)
1109	PROTOTYPE:
1110	CODE:
1111	api_cede ();
1112
1113	# and these are hacks
1114	SV *	1204	SV *
1115	_aio_get_state ()	1205	_get_state ()
1116	CODE:	1206	CODE:
1117	{	1207	{
1118	struct {	1208	struct {
1119	int errorno;	1209	int errorno;
1120	int laststype;	1210	int laststype;
…		…
1131	}	1221	}
1132	OUTPUT:	1222	OUTPUT:
1133	RETVAL	1223	RETVAL
1134		1224
1135	void	1225	void
1136	_aio_set_state (char *data_)	1226	_set_state (char *data_)
1137	PROTOTYPE: $	1227	PROTOTYPE: $
1138	CODE:	1228	CODE:
1139	{	1229	{
1140	struct {	1230	struct {
1141	int errorno;	1231	int errorno;

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Comparing Coro/Coro/State.xs (file contents): Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs. Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC