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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.10 by root, Sat Jul 21 04:19:34 2001 UTC vs.
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#if 1	5	#include "libcoro/coro.c"
6	# define CHK(x) (void *)0	6
7	#else	7	#ifdef HAVE_MMAP
8	# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x)	8	# include <unistd.h>
		9	# include <sys/mman.h>
9	#endif	10	#endif
10		11
11	#define MAY_FLUSH /* increases codesize */	12	#define MAY_FLUSH /* increases codesize */
12		13
13	#define SUB_INIT "Coro::State::coroutine_initialization"	14	#define SUB_INIT "Coro::State::initialize"
14		15
15	#define SAVE_DEFAV 0x00000001	16	#define TRANSFER_SAVE_DEFAV 0x00000001
16	#define SAVE_DEFSV 0x00000002	17	#define TRANSFER_SAVE_DEFSV 0x00000002
17	#define SAVE_ERRSV 0x00000004	18	#define TRANSFER_SAVE_ERRSV 0x00000004
		19	#define TRANSFER_SAVE_CCTXT 0x00000008
18		20
19	#define SAVE_ALL -1	21	#define TRANSFER_SAVE_ALL -1
20		22
21	struct coro {	23	struct coro {
		24	/* the optional C context */
		25	coro_context cctx;
		26	void *sptr;
		27	long ssize;
		28
22	/* optionally saved, might be zero */	29	/* optionally saved, might be zero */
23	AV *defav;	30	AV *defav;
24	SV *defsv;	31	SV *defsv;
25	SV *errsv;	32	SV *errsv;
26		33
51	I32 savestack_max;	58	I32 savestack_max;
52	OP **retstack;	59	OP **retstack;
53	I32 retstack_ix;	60	I32 retstack_ix;
54	I32 retstack_max;	61	I32 retstack_max;
55	COP *curcop;	62	COP *curcop;
		63	JMPENV start_env;
		64	JMPENV *top_env;
56		65
57	/* data associated with this coroutine (initial args) */	66	/* data associated with this coroutine (initial args) */
58	AV *args;	67	AV *args;
59	};	68	};
60		69
61	typedef struct coro *Coro__State;	70	typedef struct coro *Coro__State;
62	typedef struct coro *Coro__State_or_hashref;	71	typedef struct coro *Coro__State_or_hashref;
63		72
		73	static AV main_mainstack; / used to differentiate between $main and others */
		74	static HV *coro_state_stash;
64	static HV *padlist_cache;	75	static HV *padlist_cache;
65		76
66	/* mostly copied from op.c:cv_clone2 */	77	/* mostly copied from op.c:cv_clone2 */
67	STATIC AV *	78	STATIC AV *
68	clone_padlist (AV *protopadlist)	79	clone_padlist (AV *protopadlist)
…		…
231	#endif	242	#endif
232		243
233	#define SB do {	244	#define SB do {
234	#define SE } while (0)	245	#define SE } while (0)
235		246
236	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	247	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
237	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	248	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
238		249
239	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	250	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
240		251
241	static void	252	static void
242	load_state(pTHX_ Coro__State c)	253	load_state(pTHX_ Coro__State c)
…		…
266	PL_savestack_max = c->savestack_max;	277	PL_savestack_max = c->savestack_max;
267	PL_retstack = c->retstack;	278	PL_retstack = c->retstack;
268	PL_retstack_ix = c->retstack_ix;	279	PL_retstack_ix = c->retstack_ix;
269	PL_retstack_max = c->retstack_max;	280	PL_retstack_max = c->retstack_max;
270	PL_curcop = c->curcop;	281	PL_curcop = c->curcop;
		282	PL_start_env = c->start_env;
		283	PL_top_env = c->top_env;
271		284
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	285	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	286	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	287	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275		288
…		…
302	save_state(pTHX_ Coro__State c, int flags)	315	save_state(pTHX_ Coro__State c, int flags)
303	{	316	{
304	{	317	{
305	dSP;	318	dSP;
306	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
		320	PERL_CONTEXT *ccstk = cxstack;
307	PERL_SI *top_si = PL_curstackinfo;	321	PERL_SI *top_si = PL_curstackinfo;
308	PERL_CONTEXT *ccstk = cxstack;
309		322
310	/*	323	/*
311	* the worst thing you can imagine happens first - we have to save	324	* the worst thing you can imagine happens first - we have to save
312	* (and reinitialize) all cv's in the whole callchain :(	325	* (and reinitialize) all cv's in the whole callchain :(
313	*/	326	*/
314		327
315	PUSHs (Nullsv);	328	PUSHs (Nullsv);
316	/* this loop was inspired by pp_caller */	329	/* this loop was inspired by pp_caller */
317	for (;;)	330	for (;;)
318	{	331	{
319	do	332	do
320	{	333	{
321	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
322		335
323	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
324	{	337	{
…		…
363	}	376	}
364		377
365	PUTBACK;	378	PUTBACK;
366	}	379	}
367		380
368	c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	381	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
369	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	382	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
370	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	383	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		384
		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);
371		389
372	c->dowarn = PL_dowarn;	390	c->dowarn = PL_dowarn;
373		391
374	c->curstackinfo = PL_curstackinfo;	392	c->curstackinfo = PL_curstackinfo;
375	c->curstack = PL_curstack;	393	c->curstack = PL_curstack;
…		…
394	c->savestack_max = PL_savestack_max;	412	c->savestack_max = PL_savestack_max;
395	c->retstack = PL_retstack;	413	c->retstack = PL_retstack;
396	c->retstack_ix = PL_retstack_ix;	414	c->retstack_ix = PL_retstack_ix;
397	c->retstack_max = PL_retstack_max;	415	c->retstack_max = PL_retstack_max;
398	c->curcop = PL_curcop;	416	c->curcop = PL_curcop;
		417	c->start_env = PL_start_env;
		418	c->top_env = PL_top_env;
		419	}
		420
		421	/*
		422	* allocate various perl stacks. This is an exact copy
		423	* of perl.c:init_stacks, except that it uses less memory
		424	* on the assumption that coroutines do not usually need
		425	* a lot of stackspace.
		426	*/
		427	STATIC void
		428	coro_init_stacks (pTHX)
		429	{
		430	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		431	PL_curstackinfo->si_type = PERLSI_MAIN;
		432	PL_curstack = PL_curstackinfo->si_stack;
		433	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		434
		435	PL_stack_base = AvARRAY(PL_curstack);
		436	PL_stack_sp = PL_stack_base;
		437	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		438
		439	New(50,PL_tmps_stack,64,SV*);
		440	PL_tmps_floor = -1;
		441	PL_tmps_ix = -1;
		442	PL_tmps_max = 64;
		443
		444	New(54,PL_markstack,12,I32);
		445	PL_markstack_ptr = PL_markstack;
		446	PL_markstack_max = PL_markstack + 12;
		447
		448	SET_MARK_OFFSET;
		449
		450	New(54,PL_scopestack,12,I32);
		451	PL_scopestack_ix = 0;
		452	PL_scopestack_max = 12;
		453
		454	New(54,PL_savestack,64,ANY);
		455	PL_savestack_ix = 0;
		456	PL_savestack_max = 64;
		457
		458	New(54,PL_retstack,8,OP*);
		459	PL_retstack_ix = 0;
		460	PL_retstack_max = 8;
399	}	461	}
400		462
401	/*	463	/*
402	* destroy the stacks, the callchain etc...	464	* destroy the stacks, the callchain etc...
403	* still there is a memleak of 128 bytes...	465	* still there is a memleak of 128 bytes...
…		…
439	Safefree(PL_scopestack);	501	Safefree(PL_scopestack);
440	Safefree(PL_savestack);	502	Safefree(PL_savestack);
441	Safefree(PL_retstack);	503	Safefree(PL_retstack);
442	}	504	}
443		505
		506	static void
		507	allocate_stack (Coro__State ctx)
		508	{
		509	#ifdef HAVE_MMAP
		510	ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
		511	ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
		512	if (ctx->sptr == (void *)-1)
		513	#endif
		514	{
		515	/FIXME//D//* reasonable stack size! */
		516	ctx->ssize = 4096 * sizeof (long);
		517	New (0, ctx->sptr, 4096, long);
		518	}
		519	}
		520
		521	static void
		522	deallocate_stack (Coro__State ctx)
		523	{
		524	#ifdef HAVE_MMAP
		525	munmap (ctx->sptr, ctx->ssize);
		526	#else
		527	Safefree (ctx->sptr);
		528	#endif
		529	}
		530
		531	/* might go away together with optional SAVE_CCTXT */
		532	static void
		533	setup_coro (void *arg)
		534	{
		535	/*
		536	* emulate part of the perl startup here.
		537	*/
		538	dSP;
		539	Coro__State ctx = (Coro__State)arg;
		540	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		541
		542	coro_init_stacks (aTHX);
		543	JMPENV_BOOTSTRAP;
		544	SPAGAIN;
		545
		546	/PL_curcop = 0;/
		547	SvREFCNT_dec (GvAV (PL_defgv));
		548	GvAV (PL_defgv) = ctx->args;
		549
		550	if (ctx->sptr)
		551	{
		552	PUSHMARK(SP);
		553	PUTBACK;
		554	(void) call_sv (sub_init, G_VOID\|G_NOARGS);
		555	croak ("FATAL: CCTXT coroutine returned!");
		556	}
		557	else
		558	{
		559	UNOP myop;
		560
		561	PL_op = (OP *)&myop;
		562
		563	Zero(&myop, 1, UNOP);
		564	myop.op_next = Nullop;
		565	myop.op_flags = OPf_WANT_VOID;
		566
		567	PUSHMARK(SP);
		568	XPUSHs (sub_init);
		569	/*
		570	* the next line is slightly wrong, as PL_op->op_next
		571	* is actually being executed so we skip the first op.
		572	* that doesn't matter, though, since it is only
		573	* pp_nextstate and we never return...
		574	* ah yes, and I don't care anyways ;)
		575	*/
		576	PUTBACK;
		577	PL_op = pp_entersub();
		578	SPAGAIN;
		579
		580	ENTER; /* necessary e.g. for dounwind */
		581	}
		582	}
		583
444	STATIC void	584	STATIC void
445	transfer(pTHX_ struct coro prev, struct coro next, int flags)	585	transfer(pTHX_ struct coro prev, struct coro next, int flags)
446	{	586	{
447	dSP;	587	dSP;
448		588
449	if (prev != next)	589	if (prev != next)
450	{	590	{
451	/*	591	/*
452	* this could be done in newprocess which would lead to	592	* this could be done in newprocess which would lead to
453	* extremely elegant and fast (just SAVE/LOAD)	593	* extremely elegant and fast (basically just SAVE/LOAD)
454	* code here, but lazy allocation of stacks has also	594	* code here, but lazy allocation of stacks has also
455	* some virtues and the overhead of the if() is nil.	595	* some virtues and the overhead of the if() is nil.
456	*/	596	*/
457	if (next->mainstack)	597	if (next->mainstack)
458	{	598	{
459	SAVE (prev, flags);	599	SAVE (prev, flags);
460	LOAD (next);	600	LOAD (next);
		601
461	/* mark this state as in-use */	602	/* mark this state as in-use */
462	next->mainstack = 0;	603	next->mainstack = 0;
463	next->tmps_ix = -2;	604	next->tmps_ix = -2;
		605
		606	if (flags & TRANSFER_SAVE_CCTXT)
		607	{
		608	if (!next->ssize)
		609	croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
		610
		611	if (!prev->ssize)
		612	prev->ssize = 1; /* mark cctx as valid ;) */
		613
		614	coro_transfer (&(prev->cctx), &(next->cctx));
		615	}
		616
464	}	617	}
465	else if (next->tmps_ix == -2)	618	else if (next->tmps_ix == -2)
466	{
467	croak ("tried to transfer to running coroutine");	619	croak ("tried to transfer to running coroutine");
468	}
469	else	620	else
470	{	621	{
471	/*
472	* emulate part of the perl startup here.
473	*/
474	UNOP myop;
475
476	SAVE (prev, -1); /* first get rid of the old state */	622	SAVE (prev, -1); /* first get rid of the old state */
477		623
478	init_stacks (); /* from perl.c */	624	if (flags & TRANSFER_SAVE_CCTXT)
479	SPAGAIN;
480
481	PL_op = (OP *)&myop;
482	/PL_curcop = 0;/
483	SvREFCNT_dec (GvAV (PL_defgv));
484	GvAV (PL_defgv) = next->args;
485
486	Zero(&myop, 1, UNOP);
487	myop.op_next = Nullop;
488	myop.op_flags = OPf_WANT_VOID;
489
490	PUSHMARK(SP);
491	XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
492	/*
493	* the next line is slightly wrong, as PL_op->op_next
494	* is actually being executed so we skip the first op.
495	* that doesn't matter, though, since it is only
496	* pp_nextstate and we never return...
497	* ah yes, and I don't care anyways ;)
498	*/	625	{
499	PUTBACK;	626	if (!next->ssize)
500	PL_op = pp_entersub(aTHX);	627	{
501	SPAGAIN;	628	allocate_stack (next);
		629	coro_create (&(next->cctx),
		630	setup_coro, (void *)next,
		631	next->sptr, next->ssize);
		632	}
502		633
503	ENTER; /* necessary e.g. for dounwind */	634	if (!prev->ssize)
		635	prev->ssize = 1; /* mark cctx as valid ;) */
		636
		637	coro_transfer (&(prev->cctx), &(next->cctx));
		638	}
		639	else
		640	setup_coro (next);
504	}	641	}
505	}	642	}
506	}	643	}
507		644
508	MODULE = Coro::State PACKAGE = Coro::State	645	MODULE = Coro::State PACKAGE = Coro::State
509		646
510	PROTOTYPES: ENABLE	647	PROTOTYPES: ENABLE
511		648
512	BOOT:	649	BOOT:
513	{ /* {} necessary for stoopid perl-5.6.x */	650	{ /* {} necessary for stoopid perl-5.6.x */
514	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	651	coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE);
515		652
516	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	653	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
517	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	654	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
518	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	655	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		656	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
519		657
520	if (!padlist_cache)	658	if (!padlist_cache)
521	padlist_cache = newHV ();	659	padlist_cache = newHV ();
		660
		661	main_mainstack = PL_mainstack;
522	}	662	}
523		663
524	Coro::State	664	Coro::State
525	_newprocess(args)	665	_newprocess(args)
526	SV * args	666	SV * args
…		…
531	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	671	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
532	croak ("Coro::State::_newprocess expects an arrayref");	672	croak ("Coro::State::_newprocess expects an arrayref");
533		673
534	New (0, coro, 1, struct coro);	674	New (0, coro, 1, struct coro);
535		675
		676	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
536	coro->mainstack = 0; /* actual work is done inside transfer */	677	coro->mainstack = 0; /* actual work is done inside transfer */
537	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	678	coro->sptr = 0;
		679	coro->ssize = 0;
538		680
539	RETVAL = coro;	681	RETVAL = coro;
540	OUTPUT:	682	OUTPUT:
541	RETVAL	683	RETVAL
542		684
543	void	685	void
544	transfer(prev, next, flags = SAVE_DEFAV)	686	transfer(prev, next, flags = TRANSFER_SAVE_ALL)
545	Coro::State_or_hashref prev	687	Coro::State_or_hashref prev
546	Coro::State_or_hashref next	688	Coro::State_or_hashref next
547	int flags	689	int flags
548	PROTOTYPE: @	690	PROTOTYPE: @
549	CODE:	691	CODE:
550
551	transfer (aTHX_ prev, next, flags);	692	transfer (aTHX_ prev, next, flags);
552		693
553	void	694	void
554	DESTROY(coro)	695	DESTROY(coro)
555	Coro::State coro	696	Coro::State coro
556	CODE:	697	CODE:
557		698
558	if (coro->mainstack)	699	if (coro->mainstack && coro->mainstack != main_mainstack)
559	{	700	{
560	struct coro temp;	701	struct coro temp;
561		702
562	SAVE(aTHX_ (&temp), SAVE_ALL);	703	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
563	LOAD(aTHX_ coro);	704	LOAD(aTHX_ coro);
564		705
565	destroy_stacks ();	706	destroy_stacks (aTHX);
566		707
567	LOAD((&temp)); /* this will get rid of defsv etc.. */	708	LOAD((&temp)); /* this will get rid of defsv etc.. */
		709
		710	coro->mainstack = 0;
		711	}
		712
		713	if (coro->sptr)
		714	{
		715	deallocate_stack (coro);
		716	coro->sptr = 0;
568	}	717	}
569		718
570	Safefree (coro);	719	Safefree (coro);
571		720
572	void	721	void
…		…
576	flush_padlist_cache ();	725	flush_padlist_cache ();
577	#endif	726	#endif
578		727
579	MODULE = Coro::State PACKAGE = Coro::Cont	728	MODULE = Coro::State PACKAGE = Coro::Cont
580		729
581	# this is dirty and should be in it's own .xs	730	# this is slightly dirty
582		731
583	void	732	void
584	result(...)	733	yield(...)
585	PROTOTYPE: @	734	PROTOTYPE: @
586	CODE:	735	CODE:
587	static SV *returnstk;	736	static SV *returnstk;
588	SV *sv;	737	SV *sv;
589	AV *defav = GvAV (PL_defgv);	738	AV *defav = GvAV (PL_defgv);
590	struct coro prev, next;	739	struct coro prev, next;
591		740
592	if (!returnstk)	741	if (!returnstk)
593	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	742	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
594		743
595	/* set up @_ */	744	/* set up @_ -- ugly */
596	av_clear (defav);	745	av_clear (defav);
597	av_fill (defav, items - 1);	746	av_fill (defav, items - 1);
598	while (items--)	747	while (items--)
599	av_store (defav, items, SvREFCNT_inc (ST(items)));	748	av_store (defav, items, SvREFCNT_inc (ST(items)));
600		749
601	mg_get (returnstk); /* isn't documentation wrong for mg_get? */	750	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
602	sv = av_pop ((AV *)SvRV (returnstk));	751	sv = av_pop ((AV *)SvRV (returnstk));
603	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));	752	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
604	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	753	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
605	SvREFCNT_dec (sv);	754	SvREFCNT_dec (sv);
		755
606	transfer(prev, next, 0);	756	transfer(aTHX_ prev, next, 0);
607		757

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing Coro/Coro/State.xs (file contents): Revision 1.10 by root, Sat Jul 21 04:19:34 2001 UTC vs. Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.10 by root, Sat Jul 21 04:19:34 2001 UTC vs.
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC