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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC

…		…
1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
27	# ifndef IS_PADCONST	25	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	26	# define IS_PADCONST(v) 0
29	# endif	27	# endif
30	#endif	28	#endif
31		29
		30	#include <stdio.h>
32	#include <errno.h>	31	#include <errno.h>
		32
		33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		34	# undef STACKGUARD
		35	#endif
		36
		37	#ifndef STACKGUARD
		38	# define STACKGUARD 0
		39	#endif
33		40
34	#ifdef HAVE_MMAP	41	#ifdef HAVE_MMAP
35	# include <unistd.h>	42	# include <unistd.h>
36	# include <sys/mman.h>	43	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	44	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	46	# define MAP_ANONYMOUS MAP_ANON
40	# else	47	# else
41	# undef HAVE_MMAP	48	# undef HAVE_MMAP
42	# endif	49	# endif
43	# endif	50	# endif
		51	# include <limits.h>
		52	# ifndef PAGESIZE
		53	# define PAGESIZE pagesize
		54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		55	static long pagesize;
		56	# else
		57	# define BOOT_PAGESIZE
44	#endif	58	# endif
45		59	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		60
49	/* The next macro should declare a variable stacklevel that contains and approximation	61	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	62	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	63	* and should be unique. */
		64	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	65	#define STACKLEVEL ((void *)&stacklevel)
53		66
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	67	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		68
56	#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58	#include "CoroAPI.h"	69	#include "CoroAPI.h"
		70
		71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		72
60	#ifdef USE_ITHREADS	73	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	74	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
66	# define UNLOCK (void)0	79	# define UNLOCK (void)0
67	#endif	80	#endif
68		81
69	static struct CoroAPI coroapi;	82	static struct CoroAPI coroapi;
70	static AV main_mainstack; / used to differentiate between $main and others */	83	static AV main_mainstack; / used to differentiate between $main and others */
71	static HV *coro_state_stash;	84	static HV coro_state_stash, coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV coro_mortal; / will be freed after next transfer */	85	static SV coro_mortal; / will be freed after next transfer */
75		86
76	/* this is actually not only the c stack but also c registers etc... */	87	/* this is a structure representing a c-level coroutine */
77	typedef struct {	88	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	89	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		90
82	coro_context cctx;	91	/* the stack */
83
84	void *sptr;	92	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	93	long ssize; /* positive == mmap, otherwise malloc */
		94
		95	/* cpu state */
		96	void idle_sp; / sp of top-level transfer/schedule/cede call */
		97	JMPENV *top_env;
		98	coro_context cctx;
86	} coro_stack;	99	} coro_stack;
87		100
		101	/* this is a structure representing a perl-level coroutine */
88	struct coro {	102	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	103	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	104	coro_stack *stack;
94	void *cursp;	105
		106	/* data associated with this coroutine (initial args) */
		107	AV *args;
95	int gencnt;	108	int refcnt;
96		109
97	/* optionally saved, might be zero */	110	/* optionally saved, might be zero */
98	AV *defav;	111	AV *defav;
99	SV *defsv;	112	SV *defsv;
100	SV *errsv;	113	SV *errsv;
…		…
130	OP **retstack;	143	OP **retstack;
131	I32 retstack_ix;	144	I32 retstack_ix;
132	I32 retstack_max;	145	I32 retstack_max;
133	PMOP *curpm;	146	PMOP *curpm;
134	COP *curcop;	147	COP *curcop;
135	JMPENV *top_env;
136		148
137	/* data associated with this coroutine (initial args) */	149	/* coro process data */
138	AV *args;	150	int prio;
139	};	151	};
140		152
141	typedef struct coro *Coro__State;	153	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	154	typedef struct coro *Coro__State_or_hashref;
143		155
144	static AV *	156	static AV *
145	coro_clone_padlist (pTHX_ CV *cv)	157	coro_clone_padlist (CV *cv)
146	{	158	{
147	AV *padlist = CvPADLIST (cv);	159	AV *padlist = CvPADLIST (cv);
148	AV newpadlist, newpad;	160	AV newpadlist, newpad;
149		161
150	newpadlist = newAV ();	162	newpadlist = newAV ();
151	AvREAL_off (newpadlist);	163	AvREAL_off (newpadlist);
		164	#if PERL_VERSION < 9
152	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#else
		167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		168	#endif
153	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154	--AvFILLp (padlist);	170	--AvFILLp (padlist);
155		171
156	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157	av_store (newpadlist, 1, (SV *)newpad);	173	av_store (newpadlist, 1, (SV *)newpad);
158		174
159	return newpadlist;	175	return newpadlist;
160	}	176	}
161		177
162	static void	178	static void
163	free_padlist (pTHX_ AV *padlist)	179	free_padlist (AV *padlist)
164	{	180	{
165	/* may be during global destruction */	181	/* may be during global destruction */
166	if (SvREFCNT (padlist))	182	if (SvREFCNT (padlist))
167	{	183	{
168	I32 i = AvFILLp (padlist);	184	I32 i = AvFILLp (padlist);
…		…
189	AV *padlist;	205	AV *padlist;
190	AV av = (AV )mg->mg_obj;	206	AV av = (AV )mg->mg_obj;
191		207
192	/* casting is fun. */	208	/* casting is fun. */
193	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	209	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
194	free_padlist (aTHX_ padlist);	210	free_padlist (padlist);
195		211
196	SvREFCNT_dec (av);	212	SvREFCNT_dec (av);
197		213
198	return 0;	214	return 0;
199	}	215	}
…		…
202		218
203	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
204		220
205	/* the next two functions merely cache the padlists */	221	/* the next two functions merely cache the padlists */
206	static void	222	static void
207	get_padlist (pTHX_ CV *cv)	223	get_padlist (CV *cv)
208	{	224	{
209	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	225	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
210		226
211	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
212	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	228	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);
213	else	229	else
214	{	230	{
215	#if 0	231	#if 0
216	/* this should work - but it doesn't :( */	232	/* this is probably cleaner, but also slower? */
217	CV *cp = Perl_cv_clone (aTHX_ cv);	233	CV *cp = Perl_cv_clone (cv);
218	CvPADLIST (cv) = CvPADLIST (cp);	234	CvPADLIST (cv) = CvPADLIST (cp);
219	CvPADLIST (cp) = 0;	235	CvPADLIST (cp) = 0;
220	SvREFCNT_dec (cp);	236	SvREFCNT_dec (cp);
221	#else	237	#else
222	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	238	CvPADLIST (cv) = coro_clone_padlist (cv);
223	#endif	239	#endif
224	}	240	}
225	}	241	}
226		242
227	static void	243	static void
228	put_padlist (pTHX_ CV *cv)	244	put_padlist (CV *cv)
229	{	245	{
230	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	246	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
231		247
232	if (!mg)	248	if (!mg)
233	{	249	{
…		…
241	}	257	}
242		258
243	#define SB do {	259	#define SB do {
244	#define SE } while (0)	260	#define SE } while (0)
245		261
246	#define LOAD(state) load_state(aTHX_ (state));	262	#define LOAD(state) load_state((state));
247	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	263	#define SAVE(state,flags) save_state((state),(flags));
248		264
249	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
250		266
251	static void	267	static void
252	load_state(pTHX_ Coro__State c)	268	load_state(Coro__State c)
253	{	269	{
254	PL_dowarn = c->dowarn;	270	PL_dowarn = c->dowarn;
255	PL_in_eval = c->in_eval;	271	PL_in_eval = c->in_eval;
256		272
257	PL_curstackinfo = c->curstackinfo;	273	PL_curstackinfo = c->curstackinfo;
…		…
282	PL_retstack_ix = c->retstack_ix;	298	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;	299	PL_retstack_max = c->retstack_max;
284	#endif	300	#endif
285	PL_curpm = c->curpm;	301	PL_curpm = c->curpm;
286	PL_curcop = c->curcop;	302	PL_curcop = c->curcop;
287	PL_top_env = c->top_env;
288		303
289	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
290	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
291	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
292		307
…		…
299	{	314	{
300	AV padlist = (AV )POPs;	315	AV padlist = (AV )POPs;
301		316
302	if (padlist)	317	if (padlist)
303	{	318	{
304	put_padlist (aTHX_ cv); /* mark this padlist as available */	319	put_padlist (cv); /* mark this padlist as available */
305	CvPADLIST(cv) = padlist;	320	CvPADLIST(cv) = padlist;
306	}	321	}
307		322
308	++CvDEPTH(cv);	323	++CvDEPTH(cv);
309	}	324	}
…		…
311	PUTBACK;	326	PUTBACK;
312	}	327	}
313	}	328	}
314		329
315	static void	330	static void
316	save_state(pTHX_ Coro__State c, int flags)	331	save_state(Coro__State c, int flags)
317	{	332	{
318	{	333	{
319	dSP;	334	dSP;
320	I32 cxix = cxstack_ix;	335	I32 cxix = cxstack_ix;
321	PERL_CONTEXT *ccstk = cxstack;	336	PERL_CONTEXT *ccstk = cxstack;
…		…
349	}	364	}
350		365
351	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST(cv));
352	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
353		368
354	get_padlist (aTHX_ cv);	369	get_padlist (cv);
355	}	370	}
356	}	371	}
357	#ifdef CXt_FORMAT	372	#ifdef CXt_FORMAT
358	else if (CxTYPE(cx) == CXt_FORMAT)	373	else if (CxTYPE(cx) == CXt_FORMAT)
359	{	374	{
…		…
410	c->retstack_ix = PL_retstack_ix;	425	c->retstack_ix = PL_retstack_ix;
411	c->retstack_max = PL_retstack_max;	426	c->retstack_max = PL_retstack_max;
412	#endif	427	#endif
413	c->curpm = PL_curpm;	428	c->curpm = PL_curpm;
414	c->curcop = PL_curcop;	429	c->curcop = PL_curcop;
415	c->top_env = PL_top_env;
416	}	430	}
417		431
418	/*	432	/*
419	* allocate various perl stacks. This is an exact copy	433	* allocate various perl stacks. This is an exact copy
420	* of perl.c:init_stacks, except that it uses less memory	434	* of perl.c:init_stacks, except that it uses less memory
421	* on the (sometimes correct) assumption that coroutines do	435	* on the (sometimes correct) assumption that coroutines do
422	* not usually need a lot of stackspace.	436	* not usually need a lot of stackspace.
423	*/	437	*/
424	static void	438	static void
425	coro_init_stacks (pTHX)	439	coro_init_stacks ()
426	{	440	{
427	LOCK;
428
429	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
430	PL_curstackinfo->si_type = PERLSI_MAIN;	442	PL_curstackinfo->si_type = PERLSI_MAIN;
431	PL_curstack = PL_curstackinfo->si_stack;	443	PL_curstack = PL_curstackinfo->si_stack;
432	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433		445
…		…
459	#if PERL_VERSION < 9	471	#if PERL_VERSION < 9
460	New(54,PL_retstack,8,OP*);	472	New(54,PL_retstack,8,OP*);
461	PL_retstack_ix = 0;	473	PL_retstack_ix = 0;
462	PL_retstack_max = 8;	474	PL_retstack_max = 8;
463	#endif	475	#endif
464
465	UNLOCK;
466	}	476	}
467		477
468	/*	478	/*
469	* destroy the stacks, the callchain etc...	479	* destroy the stacks, the callchain etc...
470	*/	480	*/
471	static void	481	static void
472	destroy_stacks(pTHX)	482	destroy_stacks()
473	{	483	{
474	if (!IN_DESTRUCT)	484	if (!IN_DESTRUCT)
475	{	485	{
476	/* is this ugly, I ask? */	486	/* is this ugly, I ask? */
477	LEAVE_SCOPE (0);	487	LEAVE_SCOPE (0);
…		…
514	Safefree (PL_retstack);	524	Safefree (PL_retstack);
515	#endif	525	#endif
516	}	526	}
517		527
518	static void	528	static void
519	allocate_stack (Coro__State ctx, int alloc)	529	setup_coro (struct coro *coro)
520	{
521	coro_stack *stack;
522
523	New (0, stack, 1, coro_stack);
524
525	stack->refcnt = 1;
526	stack->usecnt = 1;
527	stack->gencnt = ctx->gencnt = 0;
528
529	if (alloc)
530	{
531	#if HAVE_MMAP
532	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
533	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
534	if (stack->sptr == (void *)-1)
535	#endif
536	{
537	stack->ssize = - (STACKSIZE * (long)sizeof (long));
538	New (0, stack->sptr, STACKSIZE, long);
539	}
540	}
541	else
542	stack->sptr = 0;
543
544	ctx->stack = stack;
545	}
546
547	static void
548	deallocate_stack (Coro__State ctx)
549	{
550	coro_stack *stack = ctx->stack;
551
552	ctx->stack = 0;
553
554	if (stack)
555	{
556	if (!--stack->refcnt)
557	{
558	#ifdef HAVE_MMAP
559	if (stack->ssize > 0 && stack->sptr)
560	munmap (stack->sptr, stack->ssize);
561	else
562	#endif
563	Safefree (stack->sptr);
564
565	Safefree (stack);
566	}
567	else if (ctx->gencnt == stack->gencnt)
568	--stack->usecnt;
569	}
570	}
571
572	static void
573	setup_coro (void *arg)
574	{	530	{
575	/*	531	/*
576	* emulate part of the perl startup here.	532	* emulate part of the perl startup here.
577	*/	533	*/
578	dTHX;	534	dTHX;
579	dSP;	535	dSP;
580	Coro__State ctx = (Coro__State)arg;	536	UNOP myop;
581	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);	537	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
582		538
583	coro_init_stacks (aTHX);	539	coro_init_stacks ();
584	/PL_curcop = 0;/	540	/PL_curcop = 0;/
585	/PL_in_eval = PL_in_eval;/ /* inherit */	541	/PL_in_eval = PL_in_eval;/ /* inherit */
586	SvREFCNT_dec (GvAV (PL_defgv));	542	SvREFCNT_dec (GvAV (PL_defgv));
587	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	543	GvAV (PL_defgv) = coro->args; coro->args = 0;
588		544
589	SPAGAIN;	545	SPAGAIN;
590		546
591	if (ctx->stack)
592	{
593	ctx->cursp = 0;
594
595	PUSHMARK(SP);
596	PUTBACK;
597	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
598
599	if (SvTRUE (ERRSV))
600	croak (NULL);
601	else
602	croak ("FATAL: CCTXT coroutine returned!");
603	}
604	else
605	{
606	UNOP myop;
607
608	PL_op = (OP *)&myop;
609
610	Zero(&myop, 1, UNOP);	547	Zero (&myop, 1, UNOP);
611	myop.op_next = Nullop;	548	myop.op_next = Nullop;
612	myop.op_flags = OPf_WANT_VOID;	549	myop.op_flags = OPf_WANT_VOID;
613		550
		551	PL_op = (OP *)&myop;
		552
614	PUSHMARK(SP);	553	PUSHMARK(SP);
615	XPUSHs (sub_init);	554	XPUSHs (sub_init);
616	/*
617	* the next line is slightly wrong, as PL_op->op_next
618	* is actually being executed so we skip the first op.
619	* that doesn't matter, though, since it is only
620	* pp_nextstate and we never return...
621	* ah yes, and I don't care anyways ;)
622	*/
623	PUTBACK;	555	PUTBACK;
624	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625	SPAGAIN;	557	SPAGAIN;
626		558
627	ENTER; /* necessary e.g. for dounwind */	559	ENTER; /* necessary e.g. for dounwind */
628	}
629	}	560	}
630		561
631	static void	562	static void
632	continue_coro (void *arg)	563	free_coro_mortal ()
633	{	564	{
634	/*
635	* this is a _very_ stripped down perl interpreter ;)
636	*/
637	dTHX;
638	Coro__State ctx = (Coro__State)arg;
639
640	PL_top_env = &ctx->start_env;
641
642	ctx->cursp = 0;
643	PL_op = PL_op->op_next;
644	CALLRUNOPS(aTHX);
645
646	abort ();
647	}
648
649	static void
650	transfer (pTHX_ struct coro prev, struct coro next, int flags)
651	{
652	dSTACKLEVEL;
653
654	if (prev != next)
655	{
656	if (next->mainstack)
657	{
658	LOCK;
659	SAVE (prev, flags);
660	LOAD (next);
661	UNLOCK;
662
663	/* mark this state as in-use */
664	next->mainstack = 0;
665	next->tmps_ix = -2;
666
667	/* stacklevel changed? if yes, grab the stack for us! */
668	if (flags & TRANSFER_SAVE_CCTXT)
669	{
670	if (!prev->stack)
671	allocate_stack (prev, 0);
672	else if (prev->cursp != stacklevel
673	&& prev->stack->usecnt > 1)
674	{
675	prev->gencnt = ++prev->stack->gencnt;
676	prev->stack->usecnt = 1;
677	}
678
679	/* has our stack been invalidated? */
680	if (next->stack && next->stack->gencnt != next->gencnt)
681	{
682	deallocate_stack (next);
683	allocate_stack (next, 1);
684	coro_create (&(next->stack->cctx),
685	continue_coro, (void *)next,
686	next->stack->sptr, labs (next->stack->ssize));
687	}
688
689	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
690	prev->cursp = stacklevel;
691	/* don't add any code here */
692	}
693	else
694	next->cursp = stacklevel;
695	}
696	else if (next->tmps_ix == -2)
697	croak ("tried to transfer to running coroutine");
698	else
699	{
700	LOCK;
701	SAVE (prev, -1); /* first get rid of the old state */
702	UNLOCK;
703
704	if (flags & TRANSFER_SAVE_CCTXT)
705	{
706	if (!prev->stack)
707	allocate_stack (prev, 0);
708
709	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710	{
711	PL_top_env = &next->start_env;
712
713	setup_coro (next);
714	next->cursp = stacklevel;
715
716	prev->stack->refcnt++;
717	prev->stack->usecnt++;
718	next->stack = prev->stack;
719	next->gencnt = prev->gencnt;
720	}
721	else
722	{
723	assert (!next->stack);
724	allocate_stack (next, 1);
725	coro_create (&(next->stack->cctx),
726	setup_coro, (void *)next,
727	next->stack->sptr, labs (next->stack->ssize));
728	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729	prev->cursp = stacklevel;
730	/* don't add any code here */
731	}
732	}
733	else
734	{
735	setup_coro (next);
736	next->cursp = stacklevel;
737	}
738	}
739	}
740
741	LOCK;
742	if (coro_mortal)	565	if (coro_mortal)
743	{	566	{
744	SvREFCNT_dec (coro_mortal);	567	SvREFCNT_dec (coro_mortal);
745	coro_mortal = 0;	568	coro_mortal = 0;
746	}	569	}
		570	}
		571
		572	static void
		573	prepare_cctx (coro_stack *cctx)
		574	{
		575	dSP;
		576	UNOP myop;
		577
		578	Zero (&myop, 1, UNOP);
		579	myop.op_next = PL_op;
		580	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		581
		582	PUSHMARK(SP);
		583	EXTEND (SP, 2);
		584	PUSHs (newSViv (PTR2IV (cctx)));
		585	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		586	PUTBACK;
		587	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		588	SPAGAIN;
		589	}
		590
		591	static void
		592	coro_run (void *arg)
		593	{
		594	/*
		595	* this is a _very_ stripped down perl interpreter ;)
		596	*/
747	UNLOCK;	597	UNLOCK;
748	}
749		598
750	#define SV_CORO(sv,func) \	599	PL_top_env = &PL_start_env;
751	do { \	600	prepare_cctx ((coro_stack *)arg);
752	if (SvROK (sv)) \
753	sv = SvRV (sv); \
754	\
755	if (SvTYPE (sv) == SVt_PVHV) \
756	{ \
757	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
758	\
759	if (!he) \
760	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761	\
762	(sv) = SvRV (HeVAL(he)); \
763	} \
764	\
765	/* must also be changed inside Coro::Cont::yield */ \
766	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
767	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768	\
769	} while(0)
770		601
771	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	602	/* somebody will hit me for both perl_run and PL_restartop */
		603	perl_run (PERL_GET_CONTEXT);
772		604
		605	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		606	abort ();
		607	}
		608
		609	static coro_stack *
		610	stack_new ()
		611	{
		612	coro_stack *stack;
		613
		614	New (0, stack, 1, coro_stack);
		615
		616	#if HAVE_MMAP
		617
		618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		619	/* mmap suppsedly does allocate-on-write for us */
		620	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		621
		622	if (stack->sptr == (void *)-1)
		623	{
		624	perror ("FATAL: unable to mmap stack for coroutine");
		625	_exit (EXIT_FAILURE);
		626	}
		627
		628	# if STACKGUARD
		629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		630	# endif
		631
		632	#else
		633
		634	stack->ssize = STACKSIZE * (long)sizeof (long);
		635	New (0, stack->sptr, STACKSIZE, long);
		636
		637	if (!stack->sptr)
		638	{
		639	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		640	_exit (EXIT_FAILURE);
		641	}
		642
		643	#endif
		644
		645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		646
		647	return stack;
		648	}
		649
		650	static void
		651	stack_free (coro_stack *stack)
		652	{
		653	if (!stack)
		654	return;
		655
		656	#if HAVE_MMAP
		657	munmap (stack->sptr, stack->ssize);
		658	#else
		659	Safefree (stack->sptr);
		660	#endif
		661
		662	Safefree (stack);
		663	}
		664
		665	static coro_stack *stack_first;
		666
		667	static coro_stack *
		668	stack_get ()
		669	{
		670	coro_stack *stack;
		671
		672	if (stack_first)
		673	{
		674	stack = stack_first;
		675	stack_first = stack->next;
		676	}
		677	else
		678	{
		679	stack = stack_new ();
		680	PL_op = PL_op->op_next;
		681	}
		682
		683	return stack;
		684	}
		685
		686	static void
		687	stack_put (coro_stack *stack)
		688	{
		689	stack->next = stack_first;
		690	stack_first = stack;
		691	}
		692
		693	/* never call directly, always through the coro_state_transfer global variable */
		694	static void
		695	transfer_impl (struct coro prev, struct coro next, int flags)
		696	{
		697	dSTACKLEVEL;
		698
		699	/* sometimes transfer is only called to set idle_sp */
		700	if (flags == TRANSFER_SET_STACKLEVEL)
		701	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		702	else if (prev != next)
		703	{
		704	coro_stack *prev__stack;
		705
		706	LOCK;
		707
		708	if (next->mainstack)
		709	{
		710	/* coroutine already started */
		711	SAVE (prev, flags);
		712	LOAD (next);
		713	}
		714	else
		715	{
		716	/* need to start coroutine */
		717	/* first get rid of the old state */
		718	SAVE (prev, -1);
		719	/* setup coroutine call */
		720	setup_coro (next);
		721	/* need a stack */
		722	next->stack = 0;
		723	}
		724
		725	if (!prev->stack)
		726	/* create a new empty context */
		727	Newz (0, prev->stack, 1, coro_stack);
		728
		729	prev__stack = prev->stack;
		730
		731	/* possibly "free" the stack */
		732	if (prev__stack->idle_sp == STACKLEVEL)
		733	{
		734	stack_put (prev__stack);
		735	prev->stack = 0;
		736	}
		737
		738	if (!next->stack)
		739	next->stack = stack_get ();
		740
		741	if (prev__stack != next->stack)
		742	{
		743	prev__stack->top_env = PL_top_env;
		744	PL_top_env = next->stack->top_env;
		745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		746	}
		747
		748	free_coro_mortal ();
		749
		750	UNLOCK;
		751	}
		752	}
		753
		754	/* use this function pointer to call the above function */
		755	/* this is done to increase chances of the compiler not inlining the call */
		756	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		757	void (coro_state_transfer)(struct coro prev, struct coro *next, int flags) = transfer_impl;
		758
		759	struct transfer_args
		760	{
		761	struct coro prev, next;
		762	int flags;
		763	};
		764
		765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		766
		767	static void
		768	coro_state_destroy (struct coro *coro)
		769	{
		770	if (coro->refcnt--)
		771	return;
		772
		773	if (coro->mainstack && coro->mainstack != main_mainstack)
		774	{
		775	struct coro temp;
		776
		777	SAVE ((&temp), TRANSFER_SAVE_ALL);
		778	LOAD (coro);
		779
		780	destroy_stacks ();
		781
		782	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		783
		784	coro->mainstack = 0;
		785	}
		786
		787	stack_free (coro->stack);
		788	SvREFCNT_dec (coro->args);
		789	Safefree (coro);
		790	}
		791
773	static void	792	static int
		793	coro_state_clear (pTHX_ SV sv, MAGIC mg)
		794	{
		795	struct coro coro = (struct coro )mg->mg_ptr;
		796	mg->mg_ptr = 0;
		797
		798	coro_state_destroy (coro);
		799
		800	return 0;
		801	}
		802
		803	static int
		804	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		805	{
		806	struct coro coro = (struct coro )mg->mg_ptr;
		807
		808	++coro->refcnt;
		809
		810	return 0;
		811	}
		812
		813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		814
		815	static struct coro *
		816	SvSTATE (SV *coro)
		817	{
		818	HV *stash;
		819	MAGIC *mg;
		820
		821	if (SvROK (coro))
		822	coro = SvRV (coro);
		823
		824	stash = SvSTASH (coro);
		825	if (stash != coro_stash && stash != coro_state_stash)
		826	{
		827	/* very slow, but rare, check */
		828	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		829	croak ("Coro::State object required");
		830	}
		831
		832	mg = SvMAGIC (coro);
		833	assert (mg->mg_type == PERL_MAGIC_ext);
		834	return (struct coro *)mg->mg_ptr;
		835	}
		836
		837	static void
		838	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)
		839	{
		840	ta->prev = SvSTATE (prev);
		841	ta->next = SvSTATE (next);
		842	ta->flags = flags;
		843	}
		844
		845	static void
774	api_transfer(pTHX_ SV prev, SV next, int flags)	846	api_transfer (SV prev, SV next, int flags)
775	{	847	{
776	SV_CORO (prev, "Coro::transfer");	848	dTHX;
777	SV_CORO (next, "Coro::transfer");	849	struct transfer_args ta;
778		850
779	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	851	prepare_transfer (&ta, prev, next, flags);
		852	TRANSFER (ta);
780	}	853	}
781		854
782	/ Coro ******************************************************************/	855	/ Coro ******************************************************************/
783		856
784	#define PRIO_MAX 3	857	#define PRIO_MAX 3
…		…
788	#define PRIO_IDLE -3	861	#define PRIO_IDLE -3
789	#define PRIO_MIN -4	862	#define PRIO_MIN -4
790		863
791	/* for Coro.pm */	864	/* for Coro.pm */
792	static GV coro_current, coro_idle;	865	static GV coro_current, coro_idle;
793	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
794	static int coro_nready;	867	static int coro_nready;
795		868
796	static void	869	static void
797	coro_enq (pTHX_ SV *sv)	870	coro_enq (SV *sv)
798	{	871	{
799	SV **xprio;
800	int prio;	872	int prio;
801		873
802	if (SvTYPE (sv) != SVt_PVHV)	874	if (SvTYPE (sv) != SVt_PVHV)
803	croak ("Coro::ready tried to enqueue something that is not a coroutine");	875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
804		876
805	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	877	prio = SvSTATE (sv)->prio;
806	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808	prio = prio > PRIO_MAX ? PRIO_MAX
809	: prio < PRIO_MIN ? PRIO_MIN
810	: prio;
811		878
812	av_push (coro_ready [prio - PRIO_MIN], sv);	879	av_push (coro_ready [prio - PRIO_MIN], sv);
813	coro_nready++;	880	coro_nready++;
814	}	881	}
815		882
816	static SV *	883	static SV *
817	coro_deq (pTHX_ int min_prio)	884	coro_deq (int min_prio)
818	{	885	{
819	int prio = PRIO_MAX - PRIO_MIN;	886	int prio = PRIO_MAX - PRIO_MIN;
820		887
821	min_prio -= PRIO_MIN;	888	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	889	if (min_prio < 0)
823	min_prio = 0;	890	min_prio = 0;
824		891
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	893	if (AvFILLp (coro_ready [prio]) >= 0)
827	{	894	{
828	coro_nready--;	895	coro_nready--;
829	return av_shift (coro_ready[prio]);	896	return av_shift (coro_ready [prio]);
830	}	897	}
831		898
832	return 0;	899	return 0;
833	}	900	}
834		901
…		…
839		906
840	if (SvROK (coro))	907	if (SvROK (coro))
841	coro = SvRV (coro);	908	coro = SvRV (coro);
842		909
843	LOCK;	910	LOCK;
844	coro_enq (aTHX_ SvREFCNT_inc (coro));	911	coro_enq (SvREFCNT_inc (coro));
845	UNLOCK;	912	UNLOCK;
846	}	913	}
847		914
848	static void	915	static void
		916	prepare_schedule (struct transfer_args *ta)
		917	{
		918	SV current, prev, *next;
		919
		920	current = GvSV (coro_current);
		921
		922	for (;;)
		923	{
		924	LOCK;
		925	next = coro_deq (PRIO_MIN);
		926	UNLOCK;
		927
		928	if (next)
		929	break;
		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;
		948
		949	/* free this only after the transfer */
		950	LOCK;
		951	free_coro_mortal ();
		952	UNLOCK;
		953	coro_mortal = prev;
		954
		955	ta->prev = SvSTATE (prev);
		956	ta->next = SvSTATE (next);
		957	ta->flags = TRANSFER_SAVE_ALL;
		958	}
		959
		960	static void
		961	prepare_cede (struct transfer_args *ta)
		962	{
		963	LOCK;
		964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		965	UNLOCK;
		966
		967	prepare_schedule (ta);
		968	}
		969
		970	static void
849	api_schedule (void)	971	api_schedule (void)
850	{	972	{
851	dTHX;	973	dTHX;
		974	struct transfer_args ta;
852		975
853	SV prev, next;	976	prepare_schedule (&ta);
854		977	TRANSFER (ta);
855	LOCK;
856
857	prev = SvRV (GvSV (coro_current));
858	next = coro_deq (aTHX_ PRIO_MIN);
859
860	if (!next)
861	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
862
863	/* free this only after the transfer */
864	coro_mortal = prev;
865	SV_CORO (prev, "Coro::schedule");
866
867	SvRV (GvSV (coro_current)) = next;
868
869	SV_CORO (next, "Coro::schedule");
870
871	UNLOCK;
872
873	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
874	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
875	}	978	}
876		979
877	static void	980	static void
878	api_cede (void)	981	api_cede (void)
879	{	982	{
880	dTHX;	983	dTHX;
		984	struct transfer_args ta;
881		985
882	LOCK;	986	prepare_cede (&ta);
883	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	987	TRANSFER (ta);
884	UNLOCK;
885
886	api_schedule ();
887	}	988	}
888		989
889	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
890		991
891	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
892		993
893	BOOT:	994	BOOT:
894	{ /* {} necessary for stoopid perl-5.6.x */	995	{
895	#ifdef USE_ITHREADS	996	#ifdef USE_ITHREADS
896	MUTEX_INIT (&coro_mutex);	997	MUTEX_INIT (&coro_mutex);
897	#endif	998	#endif
		999	BOOT_PAGESIZE;
898		1000
899	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
900	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
901	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902		1002
903	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
904	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
905	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
906	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
907		1006
908	main_mainstack = PL_mainstack;	1007	main_mainstack = PL_mainstack;
909		1008
910	coroapi.ver = CORO_API_VERSION;	1009	coroapi.ver = CORO_API_VERSION;
911	coroapi.transfer = api_transfer;	1010	coroapi.transfer = api_transfer;
912	}
913		1011
914	Coro::State	1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915	_newprocess(args)	1013	}
916	SV * args	1014
917	PROTOTYPE: $	1015	SV *
		1016	new (char *klass, ...)
918	CODE:	1017	CODE:
919	Coro__State coro;	1018	{
		1019	struct coro *coro;
		1020	HV *hv;
		1021	int i;
920		1022
921	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
922	croak ("Coro::State::_newprocess expects an arrayref");
923
924	Newz (0, coro, 1, struct coro);	1023	Newz (0, coro, 1, struct coro);
		1024	coro->args = newAV ();
925		1025
926	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
927	/coro->mainstack = 0; //actual work is done inside transfer /	1033	/coro->mainstack = 0; //actual work is done inside transfer /
928	/coro->stack = 0;/	1034	/coro->stack = 0;/
929		1035	}
930	/* same as JMPENV_BOOTSTRAP */
931	/* we might be able to recycle start_env, but safe is safe */
932	/Zero(&coro->start_env, 1, JMPENV);/
933	coro->start_env.je_ret = -1;
934	coro->start_env.je_mustcatch = TRUE;
935
936	RETVAL = coro;
937	OUTPUT:	1036	OUTPUT:
938	RETVAL	1037	RETVAL
939		1038
940	void	1039	void
941	transfer(prev, next, flags)	1040	_set_stacklevel (...)
942	SV *prev	1041	ALIAS:
943	SV *next	1042	Coro::State::transfer = 1
944	int flags	1043	Coro::schedule = 2
945	PROTOTYPE: @	1044	Coro::cede = 3
		1045	Coro::Cont::yield = 4
946	CODE:	1046	CODE:
947	PUTBACK;	1047	{
948	SV_CORO (next, "Coro::transfer");	1048	struct transfer_args ta;
949	SV_CORO (prev, "Coro::transfer");	1049
950	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1050	switch (ix)
951	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	}
952		1103
953	void	1104	void
954	DESTROY(coro)	1105	_clone_state_from (SV dst, SV src)
955	Coro::State coro	1106	CODE:
956	CODE:	1107	{
		1108	struct coro *coro_src = SvSTATE (src);
957		1109
958	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
959	{
960	struct coro temp;
961		1111
962	PUTBACK;	1112	++coro_src->refcnt;
963	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;
964	LOAD (aTHX_ coro);	1114	}
965	SPAGAIN;
966
967	destroy_stacks (aTHX);
968
969	LOAD ((&temp)); /* this will get rid of defsv etc.. */
970	SPAGAIN;
971
972	coro->mainstack = 0;
973	}
974
975	deallocate_stack (coro);
976	SvREFCNT_dec (coro->args);
977	Safefree (coro);
978		1115
979	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
980	_exit(code)	1123	_exit (code)
981	int code	1124	int code
982	PROTOTYPE: $	1125	PROTOTYPE: $
983	CODE:	1126	CODE:
984	_exit (code);	1127	_exit (code);
985		1128
986	MODULE = Coro::State PACKAGE = Coro::Cont
987
988	# this is slightly dirty (should expose a c-level api)
989
990	void
991	yield(...)
992	PROTOTYPE: @
993	CODE:
994	SV *yieldstack;
995	SV *sv;
996	AV *defav = GvAV (PL_defgv);
997	struct coro prev, next;
998
999	yieldstack = *hv_fetch (
1000	(HV *)SvRV (GvSV (coro_current)),
1001	"yieldstack", sizeof ("yieldstack") - 1,
1002	0
1003	);
1004
1005	/* set up @_ -- ugly */
1006	av_clear (defav);
1007	av_fill (defav, items - 1);
1008	while (items--)
1009	av_store (defav, items, SvREFCNT_inc (ST(items)));
1010
1011	sv = av_pop ((AV *)SvRV (yieldstack));
1012	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));
1013	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));
1014	SvREFCNT_dec (sv);
1015
1016	transfer (aTHX_ prev, next, 0);
1017
1018	MODULE = Coro::State PACKAGE = Coro	1129	MODULE = Coro::State PACKAGE = Coro
1019		1130
1020	# this is slightly dirty (should expose a c-level api)
1021
1022	BOOT:	1131	BOOT:
1023	{	1132	{
1024	int i;	1133	int i;
		1134
1025	HV *stash = gv_stashpv ("Coro", TRUE);	1135	coro_stash = gv_stashpv ("Coro", TRUE);
1026		1136
1027	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033		1143
1034	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1035	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1036		1146
1037	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1045	coroapi.ready = api_ready;	1155	coroapi.ready = api_ready;
1046	coroapi.nready = &coro_nready;	1156	coroapi.nready = &coro_nready;
1047	coroapi.current = coro_current;	1157	coroapi.current = coro_current;
1048		1158
1049	GCoroAPI = &coroapi;	1159	GCoroAPI = &coroapi;
1050	sv_setiv(sv, (IV)&coroapi);	1160	sv_setiv (sv, (IV)&coroapi);
1051	SvREADONLY_on(sv);	1161	SvREADONLY_on (sv);
1052	}	1162	}
1053	}	1163	}
1054		1164
1055	#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	}
1056		1184
1057	void	1185	void
1058	ready(self)	1186	ready (SV *self)
1059	SV * self
1060	PROTOTYPE: $	1187	PROTOTYPE: $
1061	CODE:	1188	CODE:
1062	api_ready (self);	1189	api_ready (self);
1063		1190
1064	#endif
1065
1066	int	1191	int
1067	nready(...)	1192	nready (...)
1068	PROTOTYPE:	1193	PROTOTYPE:
1069	CODE:	1194	CODE:
1070	RETVAL = coro_nready;	1195	RETVAL = coro_nready;
1071	OUTPUT:	1196	OUTPUT:
1072	RETVAL	1197	RETVAL
1073		1198
1074	void	1199	MODULE = Coro::State PACKAGE = Coro::AIO
1075	schedule(...)
1076	PROTOTYPE:
1077	CODE:
1078	api_schedule ();
1079		1200
1080	void
1081	cede(...)
1082	PROTOTYPE:
1083	CODE:
1084	api_cede ();
1085
1086	# and these are hacks
1087	SV *	1201	SV *
1088	_aio_get_state ()	1202	_get_state ()
1089	CODE:	1203	CODE:
1090	{	1204	{
1091	struct {	1205	struct {
1092	int errorno;	1206	int errorno;
1093	int laststype;	1207	int laststype;
…		…
1104	}	1218	}
1105	OUTPUT:	1219	OUTPUT:
1106	RETVAL	1220	RETVAL
1107		1221
1108	void	1222	void
1109	_aio_set_state (char *data_)	1223	_set_state (char *data_)
1110	PROTOTYPE: $	1224	PROTOTYPE: $
1111	CODE:	1225	CODE:
1112	{	1226	{
1113	struct {	1227	struct {
1114	int errorno;	1228	int errorno;

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Comparing Coro/Coro/State.xs (file contents): Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs. Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC