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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.42 by root, Mon Dec 31 20:41:45 2001 UTC

…		…
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#include "libcoro/coro.c"	5	#include "libcoro/coro.c"
6		6
		7	#include <signal.h>
		8
7	#ifdef HAVE_MMAP	9	#ifdef HAVE_MMAP
8	# include <unistd.h>	10	# include <unistd.h>
9	# include <sys/mman.h>	11	# include <sys/mman.h>
		12	# ifndef MAP_ANONYMOUS
		13	# ifdef MAP_ANON
		14	# define MAP_ANONYMOUS MAP_ANON
		15	# else
		16	# undef HAVE_MMAP
		17	# endif
		18	# endif
10	#endif	19	#endif
11		20
12	#define MAY_FLUSH /* increases codesize */	21	#define MAY_FLUSH /* increases codesize and is rarely used */
13		22
14	#define SUB_INIT "Coro::State::initialize"	23	#define SUB_INIT "Coro::State::initialize"
		24	#define UCORO_STATE "_coro_state"
15		25
16	#define TRANSFER_SAVE_DEFAV 0x00000001	26	/* The next macro should declare a variable stacklevel that contains and approximation
17	#define TRANSFER_SAVE_DEFSV 0x00000002	27	* to the current C stack pointer. Its property is that it changes with each call
18	#define TRANSFER_SAVE_ERRSV 0x00000004	28	* and should be unique. */
19	#define TRANSFER_SAVE_CCTXT 0x00000008	29	#define dSTACKLEVEL void *stacklevel = &stacklevel
20		30
21	#define TRANSFER_SAVE_ALL -1	31	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		32
		33	#define labs(l) ((l) >= 0 ? (l) : -(l))
		34
		35	#include "CoroAPI.h"
		36
		37	static struct CoroAPI coroapi;
		38
		39	/* this is actually not only the c stack but also c registers etc... */
		40	typedef struct {
		41	int refcnt; /* pointer reference counter */
		42	int usecnt; /* shared by how many coroutines */
		43	int gencnt; /* generation counter */
		44
		45	coro_context cctx;
		46
		47	void *sptr;
		48	long ssize; /* positive == mmap, otherwise malloc */
		49	} coro_stack;
22		50
23	struct coro {	51	struct coro {
24	/* the optional C context */	52	/* the optional C context */
25	coro_context cctx;	53	coro_stack *stack;
26	void *sptr;	54	void *cursp;
27	long ssize;	55	int gencnt;
28		56
29	/* optionally saved, might be zero */	57	/* optionally saved, might be zero */
30	AV *defav;	58	AV *defav;
31	SV *defsv;	59	SV *defsv;
32	SV *errsv;	60	SV *errsv;
33		61
34	/* saved global state not related to stacks */	62	/* saved global state not related to stacks */
35	U8 dowarn;	63	U8 dowarn;
		64	I32 in_eval;
36		65
37	/* the stacks and related info (callchain etc..) */	66	/* the stacks and related info (callchain etc..) */
38	PERL_SI *curstackinfo;	67	PERL_SI *curstackinfo;
39	AV *curstack;	68	AV *curstack;
40	AV *mainstack;	69	AV *mainstack;
…		…
58	I32 savestack_max;	87	I32 savestack_max;
59	OP **retstack;	88	OP **retstack;
60	I32 retstack_ix;	89	I32 retstack_ix;
61	I32 retstack_max;	90	I32 retstack_max;
62	COP *curcop;	91	COP *curcop;
63	JMPENV start_env;
64	JMPENV *top_env;	92	JMPENV *top_env;
65		93
66	/* data associated with this coroutine (initial args) */	94	/* data associated with this coroutine (initial args) */
67	AV *args;	95	AV *args;
68	};	96	};
…		…
70	typedef struct coro *Coro__State;	98	typedef struct coro *Coro__State;
71	typedef struct coro *Coro__State_or_hashref;	99	typedef struct coro *Coro__State_or_hashref;
72		100
73	static AV main_mainstack; / used to differentiate between $main and others */	101	static AV main_mainstack; / used to differentiate between $main and others */
74	static HV *coro_state_stash;	102	static HV *coro_state_stash;
		103	static SV *ucoro_state_sv;
		104	static U32 ucoro_state_hash;
75	static HV *padlist_cache;	105	static HV *padlist_cache;
		106	static SV coro_mortal; / will be freed after next transfer */
76		107
77	/* mostly copied from op.c:cv_clone2 */	108	/* mostly copied from op.c:cv_clone2 */
78	STATIC AV *	109	STATIC AV *
79	clone_padlist (AV *protopadlist)	110	clone_padlist (AV *protopadlist)
80	{	111	{
…		…
167		198
168	return newpadlist;	199	return newpadlist;
169	}	200	}
170		201
171	#ifdef MAY_FLUSH	202	#ifdef MAY_FLUSH
172	STATIC AV *	203	STATIC void
173	free_padlist (AV *padlist)	204	free_padlist (AV *padlist)
174	{	205	{
175	/* may be during global destruction */	206	/* may be during global destruction */
176	if (SvREFCNT(padlist))	207	if (SvREFCNT(padlist))
177	{	208	{
…		…
242	#endif	273	#endif
243		274
244	#define SB do {	275	#define SB do {
245	#define SE } while (0)	276	#define SE } while (0)
246		277
247	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	278	#define LOAD(state) load_state(aTHX_ (state));
248	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	279	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
249		280
250	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	281	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
251		282
252	static void	283	static void
253	load_state(pTHX_ Coro__State c)	284	load_state(pTHX_ Coro__State c)
254	{	285	{
255	PL_dowarn = c->dowarn;	286	PL_dowarn = c->dowarn;
		287	PL_in_eval = c->in_eval;
256		288
257	PL_curstackinfo = c->curstackinfo;	289	PL_curstackinfo = c->curstackinfo;
258	PL_curstack = c->curstack;	290	PL_curstack = c->curstack;
259	PL_mainstack = c->mainstack;	291	PL_mainstack = c->mainstack;
260	PL_stack_sp = c->stack_sp;	292	PL_stack_sp = c->stack_sp;
…		…
277	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
278	PL_retstack = c->retstack;	310	PL_retstack = c->retstack;
279	PL_retstack_ix = c->retstack_ix;	311	PL_retstack_ix = c->retstack_ix;
280	PL_retstack_max = c->retstack_max;	312	PL_retstack_max = c->retstack_max;
281	PL_curcop = c->curcop;	313	PL_curcop = c->curcop;
282	PL_start_env = c->start_env;
283	PL_top_env = c->top_env;	314	PL_top_env = c->top_env;
284		315
285	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	316	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
286	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	317	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
287	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	318	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
327		358
328	PUSHs (Nullsv);	359	PUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	360	/* this loop was inspired by pp_caller */
330	for (;;)	361	for (;;)
331	{	362	{
332	do	363	while (cxix >= 0)
333	{	364	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	365	PERL_CONTEXT *cx = &ccstk[cxix--];
335		366
336	if (CxTYPE(cx) == CXt_SUB)	367	if (CxTYPE(cx) == CXt_SUB)
337	{	368	{
…		…
363	/* I never used formats, so how should I know how these are implemented? */	394	/* I never used formats, so how should I know how these are implemented? */
364	/* my bold guess is as a simple, plain sub... */	395	/* my bold guess is as a simple, plain sub... */
365	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	396	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
366	}	397	}
367	}	398	}
368	while (cxix >= 0);
369		399
370	if (top_si->si_type == PERLSI_MAIN)	400	if (top_si->si_type == PERLSI_MAIN)
371	break;	401	break;
372		402
373	top_si = top_si->si_prev;	403	top_si = top_si->si_prev;
…		…
380		410
381	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	411	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
382	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	412	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
383	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	413	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
384		414
385	/* I have not the slightest idea of why av_reify is necessary */
386	/* but if it's missing the defav contents magically get replaced sometimes */
387	if (c->defav)
388	av_reify (c->defav);
389
390	c->dowarn = PL_dowarn;	415	c->dowarn = PL_dowarn;
		416	c->in_eval = PL_in_eval;
391		417
392	c->curstackinfo = PL_curstackinfo;	418	c->curstackinfo = PL_curstackinfo;
393	c->curstack = PL_curstack;	419	c->curstack = PL_curstack;
394	c->mainstack = PL_mainstack;	420	c->mainstack = PL_mainstack;
395	c->stack_sp = PL_stack_sp;	421	c->stack_sp = PL_stack_sp;
…		…
412	c->savestack_max = PL_savestack_max;	438	c->savestack_max = PL_savestack_max;
413	c->retstack = PL_retstack;	439	c->retstack = PL_retstack;
414	c->retstack_ix = PL_retstack_ix;	440	c->retstack_ix = PL_retstack_ix;
415	c->retstack_max = PL_retstack_max;	441	c->retstack_max = PL_retstack_max;
416	c->curcop = PL_curcop;	442	c->curcop = PL_curcop;
417	c->start_env = PL_start_env;
418	c->top_env = PL_top_env;	443	c->top_env = PL_top_env;
419	}	444	}
420		445
421	/*	446	/*
422	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
…		…
434		459
435	PL_stack_base = AvARRAY(PL_curstack);	460	PL_stack_base = AvARRAY(PL_curstack);
436	PL_stack_sp = PL_stack_base;	461	PL_stack_sp = PL_stack_base;
437	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438		463
439	New(50,PL_tmps_stack,64,SV*);	464	New(50,PL_tmps_stack,96,SV*);
440	PL_tmps_floor = -1;	465	PL_tmps_floor = -1;
441	PL_tmps_ix = -1;	466	PL_tmps_ix = -1;
442	PL_tmps_max = 64;	467	PL_tmps_max = 96;
443		468
444	New(54,PL_markstack,12,I32);	469	New(54,PL_markstack,16,I32);
445	PL_markstack_ptr = PL_markstack;	470	PL_markstack_ptr = PL_markstack;
446	PL_markstack_max = PL_markstack + 12;	471	PL_markstack_max = PL_markstack + 16;
447		472
448	SET_MARK_OFFSET;	473	SET_MARK_OFFSET;
449		474
450	New(54,PL_scopestack,12,I32);	475	New(54,PL_scopestack,16,I32);
451	PL_scopestack_ix = 0;	476	PL_scopestack_ix = 0;
452	PL_scopestack_max = 12;	477	PL_scopestack_max = 16;
453		478
454	New(54,PL_savestack,64,ANY);	479	New(54,PL_savestack,96,ANY);
455	PL_savestack_ix = 0;	480	PL_savestack_ix = 0;
456	PL_savestack_max = 64;	481	PL_savestack_max = 96;
457		482
458	New(54,PL_retstack,8,OP*);	483	New(54,PL_retstack,8,OP*);
459	PL_retstack_ix = 0;	484	PL_retstack_ix = 0;
460	PL_retstack_max = 8;	485	PL_retstack_max = 8;
461	}	486	}
…		…
465	* still there is a memleak of 128 bytes...	490	* still there is a memleak of 128 bytes...
466	*/	491	*/
467	STATIC void	492	STATIC void
468	destroy_stacks(pTHX)	493	destroy_stacks(pTHX)
469	{	494	{
		495	if (!IN_DESTRUCT)
		496	{
470	/* is this ugly, I ask? */	497	/* is this ugly, I ask? */
471	while (PL_scopestack_ix)	498	while (PL_scopestack_ix)
472	LEAVE;	499	LEAVE;
473		500
474	/* sure it is, but more important: is it correct?? :/ */	501	/* sure it is, but more important: is it correct?? :/ */
475	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	502	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
476	FREETMPS;	503	FREETMPS;
		504	}
477		505
478	while (PL_curstackinfo->si_next)	506	while (PL_curstackinfo->si_next)
479	PL_curstackinfo = PL_curstackinfo->si_next;	507	PL_curstackinfo = PL_curstackinfo->si_next;
480		508
481	while (PL_curstackinfo)	509	while (PL_curstackinfo)
…		…
486	dSP;	514	dSP;
487	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488	PUTBACK; /* possibly superfluous */	516	PUTBACK; /* possibly superfluous */
489	}	517	}
490		518
		519	if (!IN_DESTRUCT)
		520	{
491	dounwind(-1);	521	dounwind(-1);
492
493	SvREFCNT_dec(PL_curstackinfo->si_stack);	522	SvREFCNT_dec(PL_curstackinfo->si_stack);
		523	}
		524
494	Safefree(PL_curstackinfo->si_cxstack);	525	Safefree(PL_curstackinfo->si_cxstack);
495	Safefree(PL_curstackinfo);	526	Safefree(PL_curstackinfo);
496	PL_curstackinfo = p;	527	PL_curstackinfo = p;
497	}	528	}
498		529
…		…
502	Safefree(PL_savestack);	533	Safefree(PL_savestack);
503	Safefree(PL_retstack);	534	Safefree(PL_retstack);
504	}	535	}
505		536
506	static void	537	static void
507	allocate_stack (Coro__State ctx)	538	allocate_stack (Coro__State ctx, int alloc)
508	{	539	{
		540	coro_stack *stack;
		541
		542	New (0, stack, 1, coro_stack);
		543
		544	stack->refcnt = 1;
		545	stack->usecnt = 1;
		546	stack->gencnt = ctx->gencnt = 0;
		547	if (alloc)
		548	{
509	#ifdef HAVE_MMAP	549	#if HAVE_MMAP
510	ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */	550	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
511	ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);	551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
512	if (ctx->sptr == (void *)-1)	552	if (stack->sptr == (void *)-1)
513	#endif	553	#endif
514	{	554	{
515	/FIXME//D//* reasonable stack size! */	555	/FIXME//D//* reasonable stack size! */
516	ctx->ssize = 4096 * sizeof (long);	556	stack->ssize = -4096 * sizeof (long);
517	New (0, ctx->sptr, 4096, long);	557	New (0, stack->sptr, 4096, long);
		558	}
518	}	559	}
		560	else
		561	stack->sptr = 0;
		562
		563	ctx->stack = stack;
519	}	564	}
520		565
521	static void	566	static void
522	deallocate_stack (Coro__State ctx)	567	deallocate_stack (Coro__State ctx)
523	{	568	{
		569	coro_stack *stack = ctx->stack;
		570
		571	ctx->stack = 0;
		572
		573	if (stack)
		574	{
		575	if (!--stack->refcnt)
		576	{
524	#ifdef HAVE_MMAP	577	#ifdef HAVE_MMAP
525	munmap (ctx->sptr, ctx->ssize);	578	if (stack->ssize > 0 && stack->sptr)
		579	munmap (stack->sptr, stack->ssize);
		580	else
526	#else	581	#else
527	Safefree (ctx->sptr);	582	Safefree (stack->sptr);
528	#endif	583	#endif
		584	Safefree (stack);
		585	}
		586	else if (ctx->gencnt == stack->gencnt)
		587	--stack->usecnt;
		588	}
529	}	589	}
530		590
531	/* might go away together with optional SAVE_CCTXT */
532	static void	591	static void
533	setup_coro (void *arg)	592	setup_coro (void *arg)
534	{	593	{
535	/*	594	/*
536	* emulate part of the perl startup here.	595	* emulate part of the perl startup here.
…		…
538	dSP;	597	dSP;
539	Coro__State ctx = (Coro__State)arg;	598	Coro__State ctx = (Coro__State)arg;
540	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	599	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
541		600
542	coro_init_stacks (aTHX);	601	coro_init_stacks (aTHX);
543	JMPENV_BOOTSTRAP;
544	SPAGAIN;
545
546	/PL_curcop = 0;/	602	/PL_curcop = 0;/
		603	/PL_in_eval = PL_in_eval;/ /* inherit */
547	SvREFCNT_dec (GvAV (PL_defgv));	604	SvREFCNT_dec (GvAV (PL_defgv));
548	GvAV (PL_defgv) = ctx->args;	605	GvAV (PL_defgv) = ctx->args;
549		606
		607	SPAGAIN;
		608
550	if (ctx->sptr)	609	if (ctx->stack)
551	{	610	{
		611	ctx->cursp = 0;
		612
552	PUSHMARK(SP);	613	PUSHMARK(SP);
553	PUTBACK;	614	PUTBACK;
554	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	615	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		616
		617	if (SvTRUE (ERRSV))
		618	croak (NULL);
		619	else
555	croak ("FATAL: CCTXT coroutine returned!");	620	croak ("FATAL: CCTXT coroutine returned!");
556	}	621	}
557	else	622	else
558	{	623	{
559	UNOP myop;	624	UNOP myop;
560		625
…		…
572	* that doesn't matter, though, since it is only	637	* that doesn't matter, though, since it is only
573	* pp_nextstate and we never return...	638	* pp_nextstate and we never return...
574	* ah yes, and I don't care anyways ;)	639	* ah yes, and I don't care anyways ;)
575	*/	640	*/
576	PUTBACK;	641	PUTBACK;
577	PL_op = pp_entersub();	642	PL_op = PL_ppaddr[OP_ENTERSUB]();
578	SPAGAIN;	643	SPAGAIN;
579		644
580	ENTER; /* necessary e.g. for dounwind */	645	ENTER; /* necessary e.g. for dounwind */
581	}	646	}
		647	}
		648
		649	static void
		650	continue_coro (void *arg)
		651	{
		652	/*
		653	* this is a _very_ stripped down perl interpreter ;)
		654	*/
		655	Coro__State ctx = (Coro__State)arg;
		656	JMPENV coro_start_env;
		657
		658	/* same as JMPENV_BOOTSTRAP */
		659	Zero(&coro_start_env, 1, JMPENV);
		660	coro_start_env.je_ret = -1;
		661	coro_start_env.je_mustcatch = TRUE;
		662	PL_top_env = &coro_start_env;
		663
		664	ctx->cursp = 0;
		665	PL_op = PL_op->op_next;
		666	CALLRUNOPS(aTHX);
		667
		668	abort ();
582	}	669	}
583		670
584	STATIC void	671	STATIC void
585	transfer(pTHX_ struct coro prev, struct coro next, int flags)	672	transfer(pTHX_ struct coro prev, struct coro next, int flags)
586	{	673	{
587	dSP;	674	dSTACKLEVEL;
		675	static struct coro *xnext;
588		676
589	if (prev != next)	677	if (prev != next)
590	{	678	{
591	/*	679	xnext = next;
592	* this could be done in newprocess which would lead to	680
593	* extremely elegant and fast (basically just SAVE/LOAD)
594	* code here, but lazy allocation of stacks has also
595	* some virtues and the overhead of the if() is nil.
596	*/
597	if (next->mainstack)	681	if (next->mainstack)
598	{	682	{
599	SAVE (prev, flags);	683	SAVE (prev, flags);
600	LOAD (next);	684	LOAD (next);
601		685
602	/* mark this state as in-use */	686	/* mark this state as in-use */
603	next->mainstack = 0;	687	next->mainstack = 0;
604	next->tmps_ix = -2;	688	next->tmps_ix = -2;
605		689
		690	/* stacklevel changed? if yes, grab the stack for us! */
606	if (flags & TRANSFER_SAVE_CCTXT)	691	if (flags & TRANSFER_SAVE_CCTXT)
607	{	692	{
608	if (!next->ssize)
609	croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611	if (!prev->ssize)	693	if (!prev->stack)
612	prev->ssize = 1; /* mark cctx as valid ;) */	694	allocate_stack (prev, 0);
		695	else if (prev->cursp != stacklevel
		696	&& prev->stack->usecnt > 1)
		697	{
		698	prev->gencnt = ++prev->stack->gencnt;
		699	prev->stack->usecnt = 1;
		700	}
613		701
		702	/* has our stack been invalidated? */
		703	if (next->stack && next->stack->gencnt != next->gencnt)
		704	{
		705	deallocate_stack (next);
		706	allocate_stack (next, 1);
		707	coro_create (&(next->stack->cctx),
		708	continue_coro, (void *)next,
		709	next->stack->sptr, labs (next->stack->ssize));
		710	}
		711
614	coro_transfer (&(prev->cctx), &(next->cctx));	712	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		713	/* don't add any code here */
615	}	714	}
616		715
617	}	716	}
618	else if (next->tmps_ix == -2)	717	else if (next->tmps_ix == -2)
619	croak ("tried to transfer to running coroutine");	718	croak ("tried to transfer to running coroutine");
…		…
621	{	720	{
622	SAVE (prev, -1); /* first get rid of the old state */	721	SAVE (prev, -1); /* first get rid of the old state */
623		722
624	if (flags & TRANSFER_SAVE_CCTXT)	723	if (flags & TRANSFER_SAVE_CCTXT)
625	{	724	{
626	if (!next->ssize)	725	if (!prev->stack)
		726	allocate_stack (prev, 0);
		727
		728	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
627	{	729	{
		730	setup_coro (next);
		731
		732	prev->stack->refcnt++;
		733	prev->stack->usecnt++;
		734	next->stack = prev->stack;
		735	next->gencnt = prev->gencnt;
		736	}
		737	else
		738	{
628	allocate_stack (next);	739	allocate_stack (next, 1);
629	coro_create (&(next->cctx),	740	coro_create (&(next->stack->cctx),
630	setup_coro, (void *)next,	741	setup_coro, (void *)next,
631	next->sptr, next->ssize);	742	next->stack->sptr, labs (next->stack->ssize));
		743	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		744	/* don't add any code here */
632	}	745	}
633
634	if (!prev->ssize)
635	prev->ssize = 1; /* mark cctx as valid ;) */
636
637	coro_transfer (&(prev->cctx), &(next->cctx));
638	}	746	}
639	else	747	else
640	setup_coro (next);	748	setup_coro (next);
641	}	749	}
		750
		751	/*
		752	* xnext is now either prev or next, depending on wether
		753	* we switched the c stack or not. that's why I use a global
		754	* variable, that should become thread-specific at one point.
		755	*/
		756	xnext->cursp = stacklevel;
		757	}
		758
		759	if (coro_mortal)
		760	{
		761	SvREFCNT_dec (coro_mortal);
		762	coro_mortal = 0;
		763	}
		764	}
		765
		766	#define SV_CORO(sv,func) \
		767	do { \
		768	if (SvROK (sv)) \
		769	sv = SvRV (sv); \
		770	\
		771	if (SvTYPE(sv) == SVt_PVHV) \
		772	{ \
		773	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		774	\
		775	if (!he) \
		776	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		777	\
		778	(sv) = SvRV (HeVAL(he)); \
		779	} \
		780	\
		781	/* must also be changed inside Coro::Cont::yield */ \
		782	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		783	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		784	\
		785	} while(0)
		786
		787	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		788
		789	static void
		790	api_transfer(pTHX_ SV prev, SV next, int flags)
		791	{
		792	SV_CORO (prev, "Coro::transfer");
		793	SV_CORO (next, "Coro::transfer");
		794
		795	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		796	}
		797
		798	/ Coro ******************************************************************/
		799
		800	#define PRIO_MAX 3
		801	#define PRIO_HIGH 1
		802	#define PRIO_NORMAL 0
		803	#define PRIO_LOW -1
		804	#define PRIO_IDLE -3
		805	#define PRIO_MIN -4
		806
		807	/* for Coro.pm */
		808	static GV coro_current, coro_idle;
		809	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		810	static int coro_nready;
		811
		812	static void
		813	coro_enq (SV *sv)
		814	{
		815	if (SvTYPE (sv) == SVt_PVHV)
		816	{
		817	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		818	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		819
		820	prio = prio > PRIO_MAX ? PRIO_MAX
		821	: prio < PRIO_MIN ? PRIO_MIN
		822	: prio;
		823
		824	av_push (coro_ready [prio - PRIO_MIN], sv);
		825	coro_nready++;
		826
		827	return;
		828	}
		829
		830	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		831	}
		832
		833	static SV *
		834	coro_deq (int min_prio)
		835	{
		836	int prio = PRIO_MAX - PRIO_MIN;
		837
		838	min_prio -= PRIO_MIN;
		839	if (min_prio < 0)
		840	min_prio = 0;
		841
		842	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		843	if (av_len (coro_ready[prio]) >= 0)
		844	{
		845	coro_nready--;
		846	return av_shift (coro_ready[prio]);
642	}	847	}
		848
		849	return 0;
		850	}
		851
		852	static void
		853	api_ready (SV *coro)
		854	{
		855	if (SvROK (coro))
		856	coro = SvRV (coro);
		857
		858	coro_enq (SvREFCNT_inc (coro));
		859	}
		860
		861	static void
		862	api_schedule (void)
		863	{
		864	SV prev, next;
		865
		866	prev = SvRV (GvSV (coro_current));
		867	next = coro_deq (PRIO_MIN);
		868
		869	if (!next)
		870	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		871
		872	/* free this only after the transfer */
		873	coro_mortal = prev;
		874	SV_CORO (prev, "Coro::schedule");
		875
		876	SvRV (GvSV (coro_current)) = next;
		877
		878	SV_CORO (next, "Coro::schedule");
		879
		880	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		881	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		882	}
		883
		884	static void
		885	api_cede (void)
		886	{
		887	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		888
		889	api_schedule ();
643	}	890	}
644		891
645	MODULE = Coro::State PACKAGE = Coro::State	892	MODULE = Coro::State PACKAGE = Coro::State
646		893
647	PROTOTYPES: ENABLE	894	PROTOTYPES: ENABLE
648		895
649	BOOT:	896	BOOT:
650	{ /* {} necessary for stoopid perl-5.6.x */	897	{ /* {} necessary for stoopid perl-5.6.x */
		898	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		899	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
651	coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE);	900	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652		901
653	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	902	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
654	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	903	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
655	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	904	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
656	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	905	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
657		906
658	if (!padlist_cache)	907	if (!padlist_cache)
659	padlist_cache = newHV ();	908	padlist_cache = newHV ();
660		909
661	main_mainstack = PL_mainstack;	910	main_mainstack = PL_mainstack;
		911
		912	coroapi.ver = CORO_API_VERSION;
		913	coroapi.transfer = api_transfer;
662	}	914	}
663		915
664	Coro::State	916	Coro::State
665	_newprocess(args)	917	_newprocess(args)
666	SV * args	918	SV * args
…		…
673		925
674	New (0, coro, 1, struct coro);	926	New (0, coro, 1, struct coro);
675		927
676	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	928	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
677	coro->mainstack = 0; /* actual work is done inside transfer */	929	coro->mainstack = 0; /* actual work is done inside transfer */
678	coro->sptr = 0;	930	coro->stack = 0;
679	coro->ssize = 0;
680		931
681	RETVAL = coro;	932	RETVAL = coro;
682	OUTPUT:	933	OUTPUT:
683	RETVAL	934	RETVAL
684		935
685	void	936	void
686	transfer(prev, next, flags = TRANSFER_SAVE_ALL)	937	transfer(prev, next, flags)
687	Coro::State_or_hashref prev	938	SV *prev
688	Coro::State_or_hashref next	939	SV *next
689	int flags	940	int flags
690	PROTOTYPE: @	941	PROTOTYPE: @
691	CODE:	942	CODE:
		943	PUTBACK;
		944	SV_CORO (next, "Coro::transfer");
		945	SV_CORO (prev, "Coro::transfer");
692	transfer (aTHX_ prev, next, flags);	946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		947	SPAGAIN;
693		948
694	void	949	void
695	DESTROY(coro)	950	DESTROY(coro)
696	Coro::State coro	951	Coro::State coro
697	CODE:	952	CODE:
698		953
699	if (coro->mainstack && coro->mainstack != main_mainstack)	954	if (coro->mainstack && coro->mainstack != main_mainstack)
700	{	955	{
701	struct coro temp;	956	struct coro temp;
702		957
		958	PUTBACK;
703	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	959	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
704	LOAD(aTHX_ coro);	960	LOAD(aTHX_ coro);
		961	SPAGAIN;
705		962
706	destroy_stacks (aTHX);	963	destroy_stacks (aTHX);
707		964
708	LOAD((&temp)); /* this will get rid of defsv etc.. */	965	LOAD((&temp)); /* this will get rid of defsv etc.. */
		966	SPAGAIN;
709		967
710	coro->mainstack = 0;	968	coro->mainstack = 0;
711	}	969	}
712		970
713	if (coro->sptr)
714	{
715	deallocate_stack (coro);	971	deallocate_stack (coro);
716	coro->sptr = 0;
717	}
718		972
719	Safefree (coro);	973	Safefree (coro);
720		974
721	void	975	void
722	flush()	976	flush()
723	CODE:	977	CODE:
724	#ifdef MAY_FLUSH	978	#ifdef MAY_FLUSH
725	flush_padlist_cache ();	979	flush_padlist_cache ();
726	#endif	980	#endif
727		981
		982	void
		983	_exit(code)
		984	int code
		985	PROTOTYPE: $
		986	CODE:
		987	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		988	_exit (code);
		989	#else
		990	signal (SIGTERM, SIG_DFL);
		991	raise (SIGTERM);
		992	exit (code);
		993	#endif
		994
728	MODULE = Coro::State PACKAGE = Coro::Cont	995	MODULE = Coro::State PACKAGE = Coro::Cont
729		996
730	# this is slightly dirty	997	# this is slightly dirty (should expose a c-level api)
731		998
732	void	999	void
733	yield(...)	1000	yield(...)
734	PROTOTYPE: @	1001	PROTOTYPE: @
735	CODE:	1002	CODE:
…		…
753	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1020	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
754	SvREFCNT_dec (sv);	1021	SvREFCNT_dec (sv);
755		1022
756	transfer(aTHX_ prev, next, 0);	1023	transfer(aTHX_ prev, next, 0);
757		1024
		1025	MODULE = Coro::State PACKAGE = Coro
		1026
		1027	# this is slightly dirty (should expose a c-level api)
		1028
		1029	BOOT:
		1030	{
		1031	int i;
		1032	HV *stash = gv_stashpv ("Coro", TRUE);
		1033
		1034	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1035	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1036	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1037	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1038	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1039	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1040
		1041	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1042	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1043
		1044	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1045	coro_ready[i] = newAV ();
		1046
		1047	{
		1048	SV *sv = perl_get_sv("Coro::API", 1);
		1049
		1050	coroapi.schedule = api_schedule;
		1051	coroapi.cede = api_cede;
		1052	coroapi.ready = api_ready;
		1053	coroapi.nready = &coro_nready;
		1054	coroapi.current = coro_current;
		1055
		1056	GCoroAPI = &coroapi;
		1057	sv_setiv(sv, (IV)&coroapi);
		1058	SvREADONLY_on(sv);
		1059	}
		1060	}
		1061
		1062	void
		1063	ready(self)
		1064	SV * self
		1065	PROTOTYPE: $
		1066	CODE:
		1067	api_ready (self);
		1068
		1069	int
		1070	nready(...)
		1071	PROTOTYPE:
		1072	CODE:
		1073	RETVAL = coro_nready;
		1074	OUTPUT:
		1075	RETVAL
		1076
		1077	void
		1078	schedule(...)
		1079	PROTOTYPE:
		1080	CODE:
		1081	api_schedule ();
		1082
		1083	void
		1084	cede(...)
		1085	PROTOTYPE:
		1086	CODE:
		1087	api_cede ();
		1088

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Comparing Coro/Coro/State.xs (file contents): Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs. Revision 1.42 by root, Mon Dec 31 20:41:45 2001 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.42 by root, Mon Dec 31 20:41:45 2001 UTC