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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.65 by root, Mon Dec 5 23:50:48 2005 UTC vs.
Revision 1.95 by root, Sun Nov 26 17:35:42 2006 UTC

…		…
27	# ifndef IS_PADCONST	27	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	28	# define IS_PADCONST(v) 0
29	# endif	29	# endif
30	#endif	30	#endif
31		31
32	#include <signal.h>	32	#include <stdio.h>
		33	#include <errno.h>
		34
		35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		36	# undef STACKGUARD
		37	#endif
		38
		39	#ifndef STACKGUARD
		40	# define STACKGUARD 0
		41	#endif
33		42
34	#ifdef HAVE_MMAP	43	#ifdef HAVE_MMAP
35	# include <unistd.h>	44	# include <unistd.h>
36	# include <sys/mman.h>	45	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	46	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	48	# define MAP_ANONYMOUS MAP_ANON
40	# else	49	# else
41	# undef HAVE_MMAP	50	# undef HAVE_MMAP
42	# endif	51	# endif
43	# endif	52	# endif
		53	# include <limits.h>
		54	# ifndef PAGESIZE
		55	# define PAGESIZE pagesize
		56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		57	static long pagesize;
		58	# else
		59	# define BOOT_PAGESIZE
44	#endif	60	# endif
45		61	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		62
49	/* 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
50	* 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
51	* and should be unique. */	65	* and should be unique. */
		66	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	67	#define STACKLEVEL ((void *)&stacklevel)
53		68
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		70
56	#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58	#include "CoroAPI.h"	71	#include "CoroAPI.h"
		72
		73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		74
60	#ifdef USE_ITHREADS	75	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	76	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	79	#else
65	# define LOCK 0	80	# define LOCK (void)0
66	# define UNLOCK 0	81	# define UNLOCK (void)0
67	#endif	82	#endif
68		83
69	static struct CoroAPI coroapi;	84	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	85	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	86	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 */	87	static SV *coro_mortal; /* will be freed after next transfer */
75		88
76	/* this is actually not only the c stack but also c registers etc... */	89	/* this is a structure representing a c-level coroutine */
77	typedef struct {	90	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	91	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		92
82	coro_context cctx;	93	/* the stack */
83
84	void *sptr;	94	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	95	long ssize; /* positive == mmap, otherwise malloc */
		96
		97	/* cpu state */
		98	void *idle_sp; /* original stacklevel when coroutine was created */
		99	JMPENV *top_env;
		100	coro_context cctx;
86	} coro_stack;	101	} coro_stack;
87		102
		103	/* this is a structure representing a perl-level coroutine */
88	struct coro {	104	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	105	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	106	coro_stack *stack;
94	void *cursp;	107
		108	/* data associated with this coroutine (initial args) */
		109	AV *args;
95	int gencnt;	110	int refcnt;
96		111
97	/* optionally saved, might be zero */	112	/* optionally saved, might be zero */
98	AV *defav;	113	AV *defav;
99	SV *defsv;	114	SV *defsv;
100	SV *errsv;	115	SV *errsv;
…		…
128	I32 savestack_ix;	143	I32 savestack_ix;
129	I32 savestack_max;	144	I32 savestack_max;
130	OP **retstack;	145	OP **retstack;
131	I32 retstack_ix;	146	I32 retstack_ix;
132	I32 retstack_max;	147	I32 retstack_max;
		148	PMOP *curpm;
133	COP *curcop;	149	COP *curcop;
134	JMPENV *top_env;
135		150
136	/* data associated with this coroutine (initial args) */	151	/* coro process data */
137	AV *args;	152	int prio;
138	};	153	};
139		154
140	typedef struct coro *Coro__State;	155	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	156	typedef struct coro *Coro__State_or_hashref;
142		157
143	/* mostly copied from op.c:cv_clone2 */	158	static AV *
144	STATIC AV *	159	coro_clone_padlist (pTHX_ CV *cv)
145	clone_padlist (pTHX_ AV *protopadlist)
146	{	160	{
147	AV *av;	161	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV *newpadlist, *newpad_name, *newpad;	162	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		163
166	newpadlist = newAV ();	164	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	165	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	166	#if PERL_VERSION < 9
		167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		168	#else
		169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		170	#endif
		171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		172	--AvFILLp (padlist);
		173
		174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	175	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		176
240	return newpadlist;	177	return newpadlist;
241	}	178	}
242		179
243	STATIC void	180	static void
244	free_padlist (pTHX_ AV *padlist)	181	free_padlist (pTHX_ AV *padlist)
245	{	182	{
246	/* may be during global destruction */	183	/* may be during global destruction */
247	if (SvREFCNT (padlist))	184	if (SvREFCNT (padlist))
248	{	185	{
…		…
262		199
263	SvREFCNT_dec ((SV*)padlist);	200	SvREFCNT_dec ((SV*)padlist);
264	}	201	}
265	}	202	}
266		203
267	STATIC int	204	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	205	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	206	{
270	AV *padlist;	207	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	208	AV *av = (AV *)mg->mg_obj;
272		209
273	/* casting is fun. */	210	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	212	free_padlist (aTHX_ padlist);
276		213
277	SvREFCNT_dec (av);	214	SvREFCNT_dec (av);
		215
		216	return 0;
278	}	217	}
279		218
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	219	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		220
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		222
284	/* the next two functions merely cache the padlists */	223	/* the next two functions merely cache the padlists */
285	STATIC void	224	static void
286	get_padlist (pTHX_ CV *cv)	225	get_padlist (pTHX_ CV *cv)
287	{	226	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289		228
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
292	else	231	else
		232	{
		233	#if 0
		234	/* this should work - but it doesn't :( */
		235	CV *cp = Perl_cv_clone (aTHX_ cv);
		236	CvPADLIST (cv) = CvPADLIST (cp);
		237	CvPADLIST (cp) = 0;
		238	SvREFCNT_dec (cp);
		239	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		241	#endif
		242	}
294	}	243	}
295		244
296	STATIC void	245	static void
297	put_padlist (pTHX_ CV *cv)	246	put_padlist (pTHX_ CV *cv)
298	{	247	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
300		249
301	if (!mg)	250	if (!mg)
…		…
344	PL_scopestack_ix = c->scopestack_ix;	293	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;	294	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;	295	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;	296	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;	297	PL_savestack_max = c->savestack_max;
		298	#if PERL_VERSION < 9
349	PL_retstack = c->retstack;	299	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;	300	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;	301	PL_retstack_max = c->retstack_max;
		302	#endif
		303	PL_curpm = c->curpm;
352	PL_curcop = c->curcop;	304	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		305
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
358		309
…		…
415	}	366	}
416		367
417	PUSHs ((SV *)CvPADLIST(cv));	368	PUSHs ((SV *)CvPADLIST(cv));
418	PUSHs ((SV *)cv);	369	PUSHs ((SV *)cv);
419		370
420	get_padlist (aTHX_ cv); /* this is a monster */	371	get_padlist (aTHX_ cv);
421	}	372	}
422	}	373	}
423	#ifdef CXt_FORMAT	374	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)	375	else if (CxTYPE(cx) == CXt_FORMAT)
425	{	376	{
…		…
469	c->scopestack_ix = PL_scopestack_ix;	420	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;	421	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;	422	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;	423	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;	424	c->savestack_max = PL_savestack_max;
		425	#if PERL_VERSION < 9
474	c->retstack = PL_retstack;	426	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;	427	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;	428	c->retstack_max = PL_retstack_max;
		429	#endif
		430	c->curpm = PL_curpm;
477	c->curcop = PL_curcop;	431	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	432	}
480		433
481	/*	434	/*
482	* allocate various perl stacks. This is an exact copy	435	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	436	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	437	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	438	* not usually need a lot of stackspace.
486	*/	439	*/
487	STATIC void	440	static void
488	coro_init_stacks (pTHX)	441	coro_init_stacks (pTHX)
489	{	442	{
490	LOCK;	443	LOCK;
491		444
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
…		…
517		470
518	New(54,PL_savestack,96,ANY);	471	New(54,PL_savestack,96,ANY);
519	PL_savestack_ix = 0;	472	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	473	PL_savestack_max = 96;
521		474
		475	#if PERL_VERSION < 9
522	New(54,PL_retstack,8,OP*);	476	New(54,PL_retstack,8,OP*);
523	PL_retstack_ix = 0;	477	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	478	PL_retstack_max = 8;
		479	#endif
525		480
526	UNLOCK;	481	UNLOCK;
527	}	482	}
528		483
529	/*	484	/*
530	* destroy the stacks, the callchain etc...	485	* destroy the stacks, the callchain etc...
531	*/	486	*/
532	STATIC void	487	static void
533	destroy_stacks(pTHX)	488	destroy_stacks(pTHX)
534	{	489	{
535	if (!IN_DESTRUCT)	490	if (!IN_DESTRUCT)
536	{	491	{
537	/* is this ugly, I ask? */	492	/* is this ugly, I ask? */
…		…
569		524
570	Safefree (PL_tmps_stack);	525	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	526	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	527	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	528	Safefree (PL_savestack);
		529	#if PERL_VERSION < 9
574	Safefree (PL_retstack);	530	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	531	#endif
595	{
596	/*FIXME*//*D*//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}	532	}
606		533
607	static void	534	static void
608	deallocate_stack (Coro__State ctx)	535	setup_coro (struct coro *coro)
609	{
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void
633	setup_coro (void *arg)
634	{	536	{
635	/*	537	/*
636	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
637	*/	539	*/
638	dTHX;	540	dTHX;
639	dSP;	541	dSP;
640	Coro__State ctx = (Coro__State)arg;	542	UNOP myop;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
642		544
643	coro_init_stacks (aTHX);	545	coro_init_stacks (aTHX);
644	/*PL_curcop = 0;*/	546	/*PL_curcop = 0;*/
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */	547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
646	SvREFCNT_dec (GvAV (PL_defgv));	548	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	549	GvAV (PL_defgv) = coro->args; coro->args = 0;
648		550
649	SPAGAIN;	551	SPAGAIN;
650		552
651	if (ctx->stack)
652	{
653	ctx->cursp = 0;
654
655	PUSHMARK(SP);
656	PUTBACK;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659	if (SvTRUE (ERRSV))
660	croak (NULL);
661	else
662	croak ("FATAL: CCTXT coroutine returned!");
663	}
664	else
665	{
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);	553	Zero (&myop, 1, UNOP);
671	myop.op_next = Nullop;	554	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;	555	myop.op_flags = OPf_WANT_VOID;
673		556
		557	PL_op = (OP *)&myop;
		558
674	PUSHMARK(SP);	559	PUSHMARK(SP);
675	XPUSHs (sub_init);	560	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;	561	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;	563	SPAGAIN;
686		564
687	ENTER; /* necessary e.g. for dounwind */	565	ENTER; /* necessary e.g. for dounwind */
688	}
689	}	566	}
690		567
691	static void	568	static void
692	continue_coro (void *arg)	569	free_coro_mortal ()
693	{	570	{
694	/*
695	* this is a _very_ stripped down perl interpreter ;)
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700
701	PL_top_env = &ctx->start_env;
702
703	ctx->cursp = 0;
704	PL_op = PL_op->op_next;
705	CALLRUNOPS(aTHX);
706
707	abort ();
708	}
709
710	STATIC void
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
712	{
713	dSTACKLEVEL;
714
715	if (prev != next)
716	{
717	if (next->mainstack)
718	{
719	LOCK;
720	SAVE (prev, flags);
721	LOAD (next);
722	UNLOCK;
723
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}
757	else if (next->tmps_ix == -2)
758	croak ("tried to transfer to running coroutine");
759	else
760	{
761	LOCK;
762	SAVE (prev, -1); /* first get rid of the old state */
763	UNLOCK;
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}
800	}
801
802	LOCK;
803	if (coro_mortal)	571	if (coro_mortal)
804	{	572	{
805	SvREFCNT_dec (coro_mortal);	573	SvREFCNT_dec (coro_mortal);
806	coro_mortal = 0;	574	coro_mortal = 0;
807	}	575	}
		576	}
		577
		578	static void
		579	coro_run (void *arg)
		580	{
		581	/*
		582	* this is a _very_ stripped down perl interpreter ;)
		583	*/
		584	dTHX;
		585	int ret;
		586
808	UNLOCK;	587	UNLOCK;
809	}
810		588
811	#define SV_CORO(sv,func) \	589	PL_top_env = &PL_start_env;
812	do { \
813	if (SvROK (sv)) \
814	sv = SvRV (sv); \
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		590
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	591	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
		592	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
833		593
		594	/* continue at cctx_init, without entersub */
		595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		596
		597	/* somebody will hit me for both perl_run and PL_restartop */
		598	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
		599	printf ("ret %d\n", ret);//D
		600
		601	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		602	abort ();
		603	}
		604
		605	static coro_stack *
		606	stack_new ()
		607	{
		608	coro_stack *stack;
		609
		610	New (0, stack, 1, coro_stack);
		611
		612	#if HAVE_MMAP
		613
		614	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		615	/* mmap suppsedly does allocate-on-write for us */
		616	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		617
		618	if (stack->sptr == (void *)-1)
		619	{
		620	perror ("FATAL: unable to mmap stack for coroutine");
		621	_exit (EXIT_FAILURE);
		622	}
		623
		624	# if STACKGUARD
		625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		626	# endif
		627
		628	#else
		629
		630	stack->ssize = STACKSIZE * (long)sizeof (long);
		631	New (0, stack->sptr, STACKSIZE, long);
		632
		633	if (!stack->sptr)
		634	{
		635	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		636	_exit (EXIT_FAILURE);
		637	}
		638
		639	#endif
		640
		641	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		642
		643	return stack;
		644	}
		645
		646	static void
		647	stack_free (coro_stack *stack)
		648	{
		649	if (!stack)
		650	return;
		651
		652	#if HAVE_MMAP
		653	munmap (stack->sptr, stack->ssize);
		654	#else
		655	Safefree (stack->sptr);
		656	#endif
		657
		658	Safefree (stack);
		659	}
		660
		661	static coro_stack *stack_first;
		662
		663	static coro_stack *
		664	stack_get ()
		665	{
		666	coro_stack *stack;
		667
		668	if (stack_first)
		669	{
		670	stack = stack_first;
		671	stack_first = stack->next;
		672	}
		673	else
		674	{
		675	stack = stack_new ();
		676	PL_op = PL_op->op_next;
		677	}
		678
		679	return stack;
		680	}
		681
		682	static void
		683	stack_put (coro_stack *stack)
		684	{
		685	stack->next = stack_first;
		686	stack_first = stack;
		687	}
		688
		689	/* never call directly, always through the coro_state_transfer global variable */
		690	static void
		691	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
		692	{
		693	dSTACKLEVEL;
		694
		695	/* sometimes transfer is only called to set idle_sp */
		696	if (flags == TRANSFER_SET_STACKLEVEL)
		697	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		698	else if (prev != next)
		699	{
		700	coro_stack *prev__stack;
		701
		702	LOCK;
		703
		704	if (next->mainstack)
		705	{
		706	/* coroutine already started */
		707	SAVE (prev, flags);
		708	LOAD (next);
		709	}
		710	else
		711	{
		712	/* need to start coroutine */
		713	/* first get rid of the old state */
		714	SAVE (prev, -1);
		715	/* setup coroutine call */
		716	setup_coro (next);
		717	/* need a stack */
		718	next->stack = 0;
		719	}
		720
		721	if (!prev->stack)
		722	/* create a new empty context */
		723	Newz (0, prev->stack, 1, coro_stack);
		724
		725	prev__stack = prev->stack;
		726
		727	/* possibly "free" the stack */
		728	if (prev__stack->idle_sp == STACKLEVEL)
		729	{
		730	stack_put (prev__stack);
		731	prev->stack = 0;
		732	}
		733
		734	if (!next->stack)
		735	next->stack = stack_get ();
		736
		737	if (prev__stack != next->stack)
		738	{
		739	prev__stack->top_env = PL_top_env;
		740	PL_top_env = next->stack->top_env;
		741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		742	}
		743
		744	free_coro_mortal ();
		745
		746	UNLOCK;
		747	}
		748	}
		749
		750	/* use this function pointer to call the above function */
		751	/* this is done to increase chances of the compiler not inlining the call */
		752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
		754
		755	struct transfer_args
		756	{
		757	struct coro *prev, *next;
		758	int flags;
		759	};
		760
		761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		762
		763	static void
		764	coro_state_destroy (struct coro *coro)
		765	{
		766	if (coro->refcnt--)
		767	return;
		768
		769	if (coro->mainstack && coro->mainstack != main_mainstack)
		770	{
		771	struct coro temp;
		772
		773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		774	LOAD (aTHX_ coro);
		775
		776	destroy_stacks (aTHX);
		777
		778	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		779
		780	coro->mainstack = 0;
		781	}
		782
		783	stack_free (coro->stack);
		784	SvREFCNT_dec (coro->args);
		785	Safefree (coro);
		786	}
		787
834	static void	788	static int
		789	coro_state_clear (SV *sv, MAGIC *mg)
		790	{
		791	struct coro *coro = (struct coro *)mg->mg_ptr;
		792	mg->mg_ptr = 0;
		793
		794	coro_state_destroy (coro);
		795
		796	return 0;
		797	}
		798
		799	static int
		800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
		801	{
		802	struct coro *coro = (struct coro *)mg->mg_ptr;
		803
		804	++coro->refcnt;
		805
		806	return 0;
		807	}
		808
		809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		810
		811	static struct coro *
		812	SvSTATE (SV *coro)
		813	{
		814	HV *stash;
		815	MAGIC *mg;
		816
		817	if (SvROK (coro))
		818	coro = SvRV (coro);
		819
		820	stash = SvSTASH (coro);
		821	if (stash != coro_stash && stash != coro_state_stash)
		822	{
		823	/* very slow, but rare, check */
		824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		825	croak ("Coro::State object required");
		826	}
		827
		828	mg = SvMAGIC (coro);
		829	assert (mg->mg_type == PERL_MAGIC_ext);
		830	return (struct coro *)mg->mg_ptr;
		831	}
		832
		833	static void
		834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
		835	{
		836	ta->prev = SvSTATE (prev);
		837	ta->next = SvSTATE (next);
		838	ta->flags = flags;
		839	}
		840
		841	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	842	api_transfer (SV *prev, SV *next, int flags)
836	{	843	{
837	SV_CORO (prev, "Coro::transfer");	844	dTHX;
838	SV_CORO (next, "Coro::transfer");	845	struct transfer_args ta;
839		846
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	847	prepare_transfer (aTHX_ &ta, prev, next, flags);
		848	TRANSFER (ta);
841	}	849	}
842		850
843	/** Coro ********************************************************************/	851	/** Coro ********************************************************************/
844		852
845	#define PRIO_MAX 3	853	#define PRIO_MAX 3
…		…
849	#define PRIO_IDLE -3	857	#define PRIO_IDLE -3
850	#define PRIO_MIN -4	858	#define PRIO_MIN -4
851		859
852	/* for Coro.pm */	860	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;	861	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;	863	static int coro_nready;
856		864
857	static void	865	static void
858	coro_enq (pTHX_ SV *sv)	866	coro_enq (pTHX_ SV *sv)
859	{	867	{
		868	int prio;
		869
860	if (SvTYPE (sv) == SVt_PVHV)	870	if (SvTYPE (sv) != SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);
870	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");	871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		872
		873	prio = SvSTATE (sv)->prio;
		874
		875	av_push (coro_ready [prio - PRIO_MIN], sv);
		876	coro_nready++;
876	}	877	}
877		878
878	static SV *	879	static SV *
879	coro_deq (pTHX_ int min_prio)	880	coro_deq (pTHX_ int min_prio)
880	{	881	{
…		…
883	min_prio -= PRIO_MIN;	884	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	885	if (min_prio < 0)
885	min_prio = 0;	886	min_prio = 0;
886		887
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	889	if (AvFILLp (coro_ready [prio]) >= 0)
889	{	890	{
890	coro_nready--;	891	coro_nready--;
891	return av_shift (coro_ready[prio]);	892	return av_shift (coro_ready [prio]);
892	}	893	}
893		894
894	return 0;	895	return 0;
895	}	896	}
896		897
…		…
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	907	coro_enq (aTHX_ SvREFCNT_inc (coro));
907	UNLOCK;	908	UNLOCK;
908	}	909	}
909		910
910	static void	911	static void
911	api_schedule (void)	912	prepare_schedule (aTHX_ struct transfer_args *ta)
912	{	913	{
913	dTHX;
914
915	SV *prev, *next;	914	SV *current, *prev, *next;
916		915
917	LOCK;	916	LOCK;
918		917
919	prev = SvRV (GvSV (coro_current));	918	current = GvSV (coro_current);
		919
		920	for (;;)
		921	{
		922	LOCK;
		923
920	next = coro_deq (aTHX_ PRIO_MIN);	924	next = coro_deq (aTHX_ PRIO_MIN);
921		925
922	if (!next)	926	if (next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	927	break;
		928
		929	UNLOCK;
		930
		931	{
		932	dSP;
		933
		934	ENTER;
		935	SAVETMPS;
		936
		937	PUSHMARK (SP);
		938	PUTBACK;
		939	call_sv (GvSV (coro_idle), G_DISCARD);
		940
		941	FREETMPS;
		942	LEAVE;
		943	}
		944	}
		945
		946	prev = SvRV (current);
		947	SvRV (current) = next;
924		948
925	/* free this only after the transfer */	949	/* free this only after the transfer */
		950	free_coro_mortal ();
926	coro_mortal = prev;	951	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928		952
929	SvRV (GvSV (coro_current)) = next;	953	ta->prev = SvSTATE (prev);
930		954	ta->next = SvSTATE (next);
931	SV_CORO (next, "Coro::schedule");	955	ta->flags = TRANSFER_SAVE_ALL;
932		956
933	UNLOCK;	957	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	958	}
938		959
939	static void	960	static void
940	api_cede (void)	961	prepare_cede (aTHX_ struct transfer_args *ta)
941	{	962	{
942	dTHX;
943
944	LOCK;	963	LOCK;
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;	965	UNLOCK;
947		966
		967	prepare_schedule (ta);
		968	}
		969
		970	static void
948	api_schedule ();	971	api_schedule (void)
		972	{
		973	dTHX;
		974	struct transfer_args ta;
		975
		976	prepare_schedule (&ta);
		977	TRANSFER (ta);
		978	}
		979
		980	static void
		981	api_cede (void)
		982	{
		983	dTHX;
		984	struct transfer_args ta;
		985
		986	prepare_cede (&ta);
		987	TRANSFER (ta);
949	}	988	}
950		989
951	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
952		991
953	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
954		993
955	BOOT:	994	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	995	{
957	#ifdef USE_ITHREADS	996	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	997	MUTEX_INIT (&coro_mutex);
959	#endif	998	#endif
		999	BOOT_PAGESIZE;
960		1000
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1002
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
969		1006
970	main_mainstack = PL_mainstack;	1007	main_mainstack = PL_mainstack;
971		1008
972	coroapi.ver = CORO_API_VERSION;	1009	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1010	coroapi.transfer = api_transfer;
974	}
975		1011
976	Coro::State	1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1013	}
978	SV * args	1014
979	PROTOTYPE: $	1015	SV *
		1016	new (char *klass, ...)
980	CODE:	1017	CODE:
981	Coro__State coro;	1018	{
		1019	struct coro *coro;
		1020	HV *hv;
		1021	int i;
982		1022
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1023	Newz (0, coro, 1, struct coro);
		1024	coro->args = newAV ();
987		1025
988	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
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
990	/*coro->stack = 0;*/	1034	/*coro->stack = 0;*/
991		1035	}
992	/* same as JMPENV_BOOTSTRAP */
993	/* we might be able to recycle start_env, but safe is safe */
994	/*Zero(&coro->start_env, 1, JMPENV);*/
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997
998	RETVAL = coro;
999	OUTPUT:	1036	OUTPUT:
1000	RETVAL	1037	RETVAL
1001		1038
1002	void	1039	void
1003	transfer(prev, next, flags)	1040	_set_stacklevel (...)
1004	SV *prev	1041	ALIAS:
1005	SV *next	1042	Coro::State::transfer = 1
1006	int flags	1043	Coro::schedule = 2
1007	PROTOTYPE: @	1044	Coro::cede = 3
		1045	Coro::Cont::yield = 4
1008	CODE:	1046	CODE:
1009	PUTBACK;	1047	{
1010	SV_CORO (next, "Coro::transfer");	1048	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1049
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1050	switch (ix)
1013	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	}
1014		1103
1015	void	1104	void
1016	DESTROY(coro)	1105	_clone_state_from (SV *dst, SV *src)
1017	Coro::State coro	1106	CODE:
1018	CODE:	1107	{
		1108	struct coro *coro_src = SvSTATE (src);
1019		1109
1020	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1021	{
1022	struct coro temp;
1023		1111
1024	PUTBACK;	1112	++coro_src->refcnt;
1025	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;
1026	LOAD (aTHX_ coro);	1114	}
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040		1115
1041	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
1042	_exit(code)	1123	_exit (code)
1043	int code	1124	int code
1044	PROTOTYPE: $	1125	PROTOTYPE: $
1045	CODE:	1126	CODE:
1046	_exit (code);	1127	_exit (code);
1047		1128
1048	MODULE = Coro::State PACKAGE = Coro::Cont
1049
1050	# this is slightly dirty (should expose a c-level api)
1051
1052	void
1053	yield(...)
1054	PROTOTYPE: @
1055	CODE:
1056	SV *yieldstack;
1057	SV *sv;
1058	AV *defav = GvAV (PL_defgv);
1059	struct coro *prev, *next;
1060
1061	yieldstack = *hv_fetch (
1062	(HV *)SvRV (GvSV (coro_current)),
1063	"yieldstack", sizeof ("yieldstack") - 1,
1064	0
1065	);
1066
1067	/* set up @_ -- ugly */
1068	av_clear (defav);
1069	av_fill (defav, items - 1);
1070	while (items--)
1071	av_store (defav, items, SvREFCNT_inc (ST(items)));
1072
1073	sv = av_pop ((AV *)SvRV (yieldstack));
1074	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1075	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1076	SvREFCNT_dec (sv);
1077
1078	transfer (aTHX_ prev, next, 0);
1079
1080	MODULE = Coro::State PACKAGE = Coro	1129	MODULE = Coro::State PACKAGE = Coro
1081		1130
1082	# this is slightly dirty (should expose a c-level api)
1083
1084	BOOT:	1131	BOOT:
1085	{	1132	{
1086	int i;	1133	int i;
		1134
1087	HV *stash = gv_stashpv ("Coro", TRUE);	1135	coro_stash = gv_stashpv ("Coro", TRUE);
1088		1136
1089	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1090	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1091	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1092	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1093	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1094	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1095		1143
1096	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1097	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1098		1146
1099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1107	coroapi.ready = api_ready;	1155	coroapi.ready = api_ready;
1108	coroapi.nready = &coro_nready;	1156	coroapi.nready = &coro_nready;
1109	coroapi.current = coro_current;	1157	coroapi.current = coro_current;
1110		1158
1111	GCoroAPI = &coroapi;	1159	GCoroAPI = &coroapi;
1112	sv_setiv(sv, (IV)&coroapi);	1160	sv_setiv (sv, (IV)&coroapi);
1113	SvREADONLY_on(sv);	1161	SvREADONLY_on (sv);
1114	}	1162	}
1115	}	1163	}
1116		1164
1117	#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	}
1118		1184
1119	void	1185	void
1120	ready(self)	1186	ready (SV *self)
1121	SV * self
1122	PROTOTYPE: $	1187	PROTOTYPE: $
1123	CODE:	1188	CODE:
1124	api_ready (self);	1189	api_ready (self);
1125		1190
1126	#endif
1127
1128	int	1191	int
1129	nready(...)	1192	nready (...)
1130	PROTOTYPE:	1193	PROTOTYPE:
1131	CODE:	1194	CODE:
1132	RETVAL = coro_nready;	1195	RETVAL = coro_nready;
1133	OUTPUT:	1196	OUTPUT:
1134	RETVAL	1197	RETVAL
1135		1198
		1199	MODULE = Coro::State PACKAGE = Coro::AIO
		1200
		1201	SV *
		1202	_get_state ()
		1203	CODE:
		1204	{
		1205	struct {
		1206	int errorno;
		1207	int laststype;
		1208	int laststatval;
		1209	Stat_t statcache;
		1210	} data;
		1211
		1212	data.errorno = errno;
		1213	data.laststype = PL_laststype;
		1214	data.laststatval = PL_laststatval;
		1215	data.statcache = PL_statcache;
		1216
		1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1218	}
		1219	OUTPUT:
		1220	RETVAL
		1221
1136	void	1222	void
1137	schedule(...)	1223	_set_state (char *data_)
1138	PROTOTYPE:	1224	PROTOTYPE: $
1139	CODE:	1225	CODE:
1140	api_schedule ();	1226	{
		1227	struct {
		1228	int errorno;
		1229	int laststype;
		1230	int laststatval;
		1231	Stat_t statcache;
		1232	} *data = (void *)data_;
1141		1233
1142	void	1234	errno = data->errorno;
1143	cede(...)	1235	PL_laststype = data->laststype;
1144	PROTOTYPE:	1236	PL_laststatval = data->laststatval;
1145	CODE:	1237	PL_statcache = data->statcache;
1146	api_cede ();	1238	}
1147

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