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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.66 by root, Mon Dec 12 19:43:41 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;
…		…
130	OP **retstack;	145	OP **retstack;
131	I32 retstack_ix;	146	I32 retstack_ix;
132	I32 retstack_max;	147	I32 retstack_max;
133	PMOP *curpm;	148	PMOP *curpm;
134	COP *curcop;	149	COP *curcop;
135	JMPENV *top_env;
136		150
137	/* data associated with this coroutine (initial args) */	151	/* coro process data */
138	AV *args;	152	int prio;
139	};	153	};
140		154
141	typedef struct coro *Coro__State;	155	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	156	typedef struct coro *Coro__State_or_hashref;
143		157
144	/* mostly copied from op.c:cv_clone2 */	158	static AV *
145	STATIC AV *	159	coro_clone_padlist (pTHX_ CV *cv)
146	clone_padlist (pTHX_ AV *protopadlist)
147	{	160	{
148	AV *av;	161	AV *padlist = CvPADLIST (cv);
149	I32 ix;
150	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
151	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
152	SV **pname = AvARRAY (protopad_name);
153	SV **ppad = AvARRAY (protopad);
154	I32 fname = AvFILLp (protopad_name);
155	I32 fpad = AvFILLp (protopad);
156	AV *newpadlist, *newpad_name, *newpad;	162	AV *newpadlist, *newpad;
157	SV **npad;
158
159	newpad_name = newAV ();
160	for (ix = fname; ix >= 0; ix--)
161	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163	newpad = newAV ();
164	av_fill (newpad, AvFILLp (protopad));
165	npad = AvARRAY (newpad);
166		163
167	newpadlist = newAV ();	164	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	165	AvREAL_off (newpadlist);
169	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)));
170	av_store (newpadlist, 1, (SV *) newpad);	175	av_store (newpadlist, 1, (SV *)newpad);
171
172	av = newAV (); /* will be @_ */
173	av_extend (av, 0);
174	av_store (newpad, 0, (SV *) av);
175	AvFLAGS (av) = AVf_REIFY;
176
177	for (ix = fpad; ix > 0; ix--)
178	{
179	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
180
181	if (namesv && namesv != &PL_sv_undef)
182	{
183	char *name = SvPVX (namesv); /* XXX */
184
185	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
186	{ /* lexical from outside? */
187	npad[ix] = SvREFCNT_inc (ppad[ix]);
188	}
189	else
190	{ /* our own lexical */
191	SV *sv;
192	if (*name == '&')
193	sv = SvREFCNT_inc (ppad[ix]);
194	else if (*name == '@')
195	sv = (SV *) newAV ();
196	else if (*name == '%')
197	sv = (SV *) newHV ();
198	else
199	sv = NEWSV (0, 0);
200
201	#ifdef SvPADBUSY
202	if (!SvPADBUSY (sv))
203	#endif
204	SvPADMY_on (sv);
205
206	npad[ix] = sv;
207	}
208	}
209	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210	{
211	npad[ix] = SvREFCNT_inc (ppad[ix]);
212	}
213	else
214	{
215	SV *sv = NEWSV (0, 0);
216	SvPADTMP_on (sv);
217	npad[ix] = sv;
218	}
219	}
220
221	#if 0 /* return -ENOTUNDERSTOOD */
222	/* Now that vars are all in place, clone nested closures. */
223
224	for (ix = fpad; ix > 0; ix--) {
225	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226	if (namesv
227	&& namesv != &PL_sv_undef
228	&& !(SvFLAGS(namesv) & SVf_FAKE)
229	&& *SvPVX(namesv) == '&'
230	&& CvCLONE(ppad[ix]))
231	{
232	CV *kid = cv_clone((CV*)ppad[ix]);
233	SvREFCNT_dec(ppad[ix]);
234	CvCLONE_on(kid);
235	SvPADMY_on(kid);
236	npad[ix] = (SV*)kid;
237	}
238	}
239	#endif
240		176
241	return newpadlist;	177	return newpadlist;
242	}	178	}
243		179
244	STATIC void	180	static void
245	free_padlist (pTHX_ AV *padlist)	181	free_padlist (pTHX_ AV *padlist)
246	{	182	{
247	/* may be during global destruction */	183	/* may be during global destruction */
248	if (SvREFCNT (padlist))	184	if (SvREFCNT (padlist))
249	{	185	{
…		…
263		199
264	SvREFCNT_dec ((SV*)padlist);	200	SvREFCNT_dec ((SV*)padlist);
265	}	201	}
266	}	202	}
267		203
268	STATIC int	204	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	205	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	206	{
271	AV *padlist;	207	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	208	AV *av = (AV *)mg->mg_obj;
273		209
274	/* casting is fun. */	210	/* casting is fun. */
275	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276	free_padlist (aTHX_ padlist);	212	free_padlist (aTHX_ padlist);
277		213
278	SvREFCNT_dec (av);	214	SvREFCNT_dec (av);
		215
		216	return 0;
279	}	217	}
280		218
281	#define PERL_MAGIC_coro PERL_MAGIC_ext	219	#define PERL_MAGIC_coro PERL_MAGIC_ext
282		220
283	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
284		222
285	/* the next two functions merely cache the padlists */	223	/* the next two functions merely cache the padlists */
286	STATIC void	224	static void
287	get_padlist (pTHX_ CV *cv)	225	get_padlist (pTHX_ CV *cv)
288	{	226	{
289	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
290		228
291	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
292	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
293	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
294	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		241	#endif
		242	}
295	}	243	}
296		244
297	STATIC void	245	static void
298	put_padlist (pTHX_ CV *cv)	246	put_padlist (pTHX_ CV *cv)
299	{	247	{
300	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301		249
302	if (!mg)	250	if (!mg)
…		…
345	PL_scopestack_ix = c->scopestack_ix;	293	PL_scopestack_ix = c->scopestack_ix;
346	PL_scopestack_max = c->scopestack_max;	294	PL_scopestack_max = c->scopestack_max;
347	PL_savestack = c->savestack;	295	PL_savestack = c->savestack;
348	PL_savestack_ix = c->savestack_ix;	296	PL_savestack_ix = c->savestack_ix;
349	PL_savestack_max = c->savestack_max;	297	PL_savestack_max = c->savestack_max;
		298	#if PERL_VERSION < 9
350	PL_retstack = c->retstack;	299	PL_retstack = c->retstack;
351	PL_retstack_ix = c->retstack_ix;	300	PL_retstack_ix = c->retstack_ix;
352	PL_retstack_max = c->retstack_max;	301	PL_retstack_max = c->retstack_max;
		302	#endif
353	PL_curpm = c->curpm;	303	PL_curpm = c->curpm;
354	PL_curcop = c->curcop;	304	PL_curcop = c->curcop;
355	PL_top_env = c->top_env;
356		305
357	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
358	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
359	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
360		309
…		…
417	}	366	}
418		367
419	PUSHs ((SV *)CvPADLIST(cv));	368	PUSHs ((SV *)CvPADLIST(cv));
420	PUSHs ((SV *)cv);	369	PUSHs ((SV *)cv);
421		370
422	get_padlist (aTHX_ cv); /* this is a monster */	371	get_padlist (aTHX_ cv);
423	}	372	}
424	}	373	}
425	#ifdef CXt_FORMAT	374	#ifdef CXt_FORMAT
426	else if (CxTYPE(cx) == CXt_FORMAT)	375	else if (CxTYPE(cx) == CXt_FORMAT)
427	{	376	{
…		…
471	c->scopestack_ix = PL_scopestack_ix;	420	c->scopestack_ix = PL_scopestack_ix;
472	c->scopestack_max = PL_scopestack_max;	421	c->scopestack_max = PL_scopestack_max;
473	c->savestack = PL_savestack;	422	c->savestack = PL_savestack;
474	c->savestack_ix = PL_savestack_ix;	423	c->savestack_ix = PL_savestack_ix;
475	c->savestack_max = PL_savestack_max;	424	c->savestack_max = PL_savestack_max;
		425	#if PERL_VERSION < 9
476	c->retstack = PL_retstack;	426	c->retstack = PL_retstack;
477	c->retstack_ix = PL_retstack_ix;	427	c->retstack_ix = PL_retstack_ix;
478	c->retstack_max = PL_retstack_max;	428	c->retstack_max = PL_retstack_max;
		429	#endif
479	c->curpm = PL_curpm;	430	c->curpm = PL_curpm;
480	c->curcop = PL_curcop;	431	c->curcop = PL_curcop;
481	c->top_env = PL_top_env;
482	}	432	}
483		433
484	/*	434	/*
485	* allocate various perl stacks. This is an exact copy	435	* allocate various perl stacks. This is an exact copy
486	* of perl.c:init_stacks, except that it uses less memory	436	* of perl.c:init_stacks, except that it uses less memory
487	* on the (sometimes correct) assumption that coroutines do	437	* on the (sometimes correct) assumption that coroutines do
488	* not usually need a lot of stackspace.	438	* not usually need a lot of stackspace.
489	*/	439	*/
490	STATIC void	440	static void
491	coro_init_stacks (pTHX)	441	coro_init_stacks (pTHX)
492	{	442	{
493	LOCK;	443	LOCK;
494		444
495	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
…		…
520		470
521	New(54,PL_savestack,96,ANY);	471	New(54,PL_savestack,96,ANY);
522	PL_savestack_ix = 0;	472	PL_savestack_ix = 0;
523	PL_savestack_max = 96;	473	PL_savestack_max = 96;
524		474
		475	#if PERL_VERSION < 9
525	New(54,PL_retstack,8,OP*);	476	New(54,PL_retstack,8,OP*);
526	PL_retstack_ix = 0;	477	PL_retstack_ix = 0;
527	PL_retstack_max = 8;	478	PL_retstack_max = 8;
		479	#endif
528		480
529	UNLOCK;	481	UNLOCK;
530	}	482	}
531		483
532	/*	484	/*
533	* destroy the stacks, the callchain etc...	485	* destroy the stacks, the callchain etc...
534	*/	486	*/
535	STATIC void	487	static void
536	destroy_stacks(pTHX)	488	destroy_stacks(pTHX)
537	{	489	{
538	if (!IN_DESTRUCT)	490	if (!IN_DESTRUCT)
539	{	491	{
540	/* is this ugly, I ask? */	492	/* is this ugly, I ask? */
…		…
572		524
573	Safefree (PL_tmps_stack);	525	Safefree (PL_tmps_stack);
574	Safefree (PL_markstack);	526	Safefree (PL_markstack);
575	Safefree (PL_scopestack);	527	Safefree (PL_scopestack);
576	Safefree (PL_savestack);	528	Safefree (PL_savestack);
		529	#if PERL_VERSION < 9
577	Safefree (PL_retstack);	530	Safefree (PL_retstack);
578	}
579
580	static void
581	allocate_stack (Coro__State ctx, int alloc)
582	{
583	coro_stack *stack;
584
585	New (0, stack, 1, coro_stack);
586
587	stack->refcnt = 1;
588	stack->usecnt = 1;
589	stack->gencnt = ctx->gencnt = 0;
590
591	if (alloc)
592	{
593	#if HAVE_MMAP
594	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
595	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
596	if (stack->sptr == (void *)-1)
597	#endif	531	#endif
598	{
599	/*FIXME*//*D*//* reasonable stack size! */
600	stack->ssize = - (8192 * sizeof (long));
601	New (0, stack->sptr, 8192, long);
602	}
603	}
604	else
605	stack->sptr = 0;
606
607	ctx->stack = stack;
608	}	532	}
609		533
610	static void	534	static void
611	deallocate_stack (Coro__State ctx)	535	setup_coro (struct coro *coro)
612	{
613	coro_stack *stack = ctx->stack;
614
615	ctx->stack = 0;
616
617	if (stack)
618	{
619	if (!--stack->refcnt)
620	{
621	#ifdef HAVE_MMAP
622	if (stack->ssize > 0 && stack->sptr)
623	munmap (stack->sptr, stack->ssize);
624	else
625	#endif
626	Safefree (stack->sptr);
627
628	Safefree (stack);
629	}
630	else if (ctx->gencnt == stack->gencnt)
631	--stack->usecnt;
632	}
633	}
634
635	static void
636	setup_coro (void *arg)
637	{	536	{
638	/*	537	/*
639	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
640	*/	539	*/
641	dTHX;	540	dTHX;
642	dSP;	541	dSP;
643	Coro__State ctx = (Coro__State)arg;	542	UNOP myop;
644	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
645		544
646	coro_init_stacks (aTHX);	545	coro_init_stacks (aTHX);
647	/*PL_curcop = 0;*/	546	/*PL_curcop = 0;*/
648	/*PL_in_eval = PL_in_eval;*/ /* inherit */	547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
649	SvREFCNT_dec (GvAV (PL_defgv));	548	SvREFCNT_dec (GvAV (PL_defgv));
650	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	549	GvAV (PL_defgv) = coro->args; coro->args = 0;
651		550
652	SPAGAIN;	551	SPAGAIN;
653		552
654	if (ctx->stack)
655	{
656	ctx->cursp = 0;
657
658	PUSHMARK(SP);
659	PUTBACK;
660	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
661
662	if (SvTRUE (ERRSV))
663	croak (NULL);
664	else
665	croak ("FATAL: CCTXT coroutine returned!");
666	}
667	else
668	{
669	UNOP myop;
670
671	PL_op = (OP *)&myop;
672
673	Zero(&myop, 1, UNOP);	553	Zero (&myop, 1, UNOP);
674	myop.op_next = Nullop;	554	myop.op_next = Nullop;
675	myop.op_flags = OPf_WANT_VOID;	555	myop.op_flags = OPf_WANT_VOID;
676		556
		557	PL_op = (OP *)&myop;
		558
677	PUSHMARK(SP);	559	PUSHMARK(SP);
678	XPUSHs (sub_init);	560	XPUSHs (sub_init);
679	/*
680	* the next line is slightly wrong, as PL_op->op_next
681	* is actually being executed so we skip the first op.
682	* that doesn't matter, though, since it is only
683	* pp_nextstate and we never return...
684	* ah yes, and I don't care anyways ;)
685	*/
686	PUTBACK;	561	PUTBACK;
687	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688	SPAGAIN;	563	SPAGAIN;
689		564
690	ENTER; /* necessary e.g. for dounwind */	565	ENTER; /* necessary e.g. for dounwind */
691	}
692	}	566	}
693		567
694	static void	568	static void
695	continue_coro (void *arg)	569	free_coro_mortal ()
696	{	570	{
697	/*
698	* this is a _very_ stripped down perl interpreter ;)
699	*/
700	dTHX;
701	Coro__State ctx = (Coro__State)arg;
702	JMPENV coro_start_env;
703
704	PL_top_env = &ctx->start_env;
705
706	ctx->cursp = 0;
707	PL_op = PL_op->op_next;
708	CALLRUNOPS(aTHX);
709
710	abort ();
711	}
712
713	STATIC void
714	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
715	{
716	dSTACKLEVEL;
717
718	if (prev != next)
719	{
720	if (next->mainstack)
721	{
722	LOCK;
723	SAVE (prev, flags);
724	LOAD (next);
725	UNLOCK;
726
727	/* mark this state as in-use */
728	next->mainstack = 0;
729	next->tmps_ix = -2;
730
731	/* stacklevel changed? if yes, grab the stack for us! */
732	if (flags & TRANSFER_SAVE_CCTXT)
733	{
734	if (!prev->stack)
735	allocate_stack (prev, 0);
736	else if (prev->cursp != stacklevel
737	&& prev->stack->usecnt > 1)
738	{
739	prev->gencnt = ++prev->stack->gencnt;
740	prev->stack->usecnt = 1;
741	}
742
743	/* has our stack been invalidated? */
744	if (next->stack && next->stack->gencnt != next->gencnt)
745	{
746	deallocate_stack (next);
747	allocate_stack (next, 1);
748	coro_create (&(next->stack->cctx),
749	continue_coro, (void *)next,
750	next->stack->sptr, labs (next->stack->ssize));
751	}
752
753	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
754	prev->cursp = stacklevel;
755	/* don't add any code here */
756	}
757	else
758	next->cursp = stacklevel;
759	}
760	else if (next->tmps_ix == -2)
761	croak ("tried to transfer to running coroutine");
762	else
763	{
764	LOCK;
765	SAVE (prev, -1); /* first get rid of the old state */
766	UNLOCK;
767
768	if (flags & TRANSFER_SAVE_CCTXT)
769	{
770	if (!prev->stack)
771	allocate_stack (prev, 0);
772
773	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
774	{
775	PL_top_env = &next->start_env;
776
777	setup_coro (next);
778	next->cursp = stacklevel;
779
780	prev->stack->refcnt++;
781	prev->stack->usecnt++;
782	next->stack = prev->stack;
783	next->gencnt = prev->gencnt;
784	}
785	else
786	{
787	assert (!next->stack);
788	allocate_stack (next, 1);
789	coro_create (&(next->stack->cctx),
790	setup_coro, (void *)next,
791	next->stack->sptr, labs (next->stack->ssize));
792	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
793	prev->cursp = stacklevel;
794	/* don't add any code here */
795	}
796	}
797	else
798	{
799	setup_coro (next);
800	next->cursp = stacklevel;
801	}
802	}
803	}
804
805	LOCK;
806	if (coro_mortal)	571	if (coro_mortal)
807	{	572	{
808	SvREFCNT_dec (coro_mortal);	573	SvREFCNT_dec (coro_mortal);
809	coro_mortal = 0;	574	coro_mortal = 0;
810	}	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
811	UNLOCK;	587	UNLOCK;
812	}
813		588
814	#define SV_CORO(sv,func) \	589	PL_top_env = &PL_start_env;
815	do { \
816	if (SvROK (sv)) \
817	sv = SvRV (sv); \
818	\
819	if (SvTYPE (sv) == SVt_PVHV) \
820	{ \
821	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
822	\
823	if (!he) \
824	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
825	\
826	(sv) = SvRV (HeVAL(he)); \
827	} \
828	\
829	/* must also be changed inside Coro::Cont::yield */ \
830	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
831	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
832	\
833	} while(0)
834		590
835	#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));
836		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
837	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
838	api_transfer(pTHX_ SV *prev, SV *next, int flags)	842	api_transfer (SV *prev, SV *next, int flags)
839	{	843	{
840	SV_CORO (prev, "Coro::transfer");	844	dTHX;
841	SV_CORO (next, "Coro::transfer");	845	struct transfer_args ta;
842		846
843	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	847	prepare_transfer (aTHX_ &ta, prev, next, flags);
		848	TRANSFER (ta);
844	}	849	}
845		850
846	/** Coro ********************************************************************/	851	/** Coro ********************************************************************/
847		852
848	#define PRIO_MAX 3	853	#define PRIO_MAX 3
…		…
852	#define PRIO_IDLE -3	857	#define PRIO_IDLE -3
853	#define PRIO_MIN -4	858	#define PRIO_MIN -4
854		859
855	/* for Coro.pm */	860	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;	861	static GV *coro_current, *coro_idle;
857	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;	863	static int coro_nready;
859		864
860	static void	865	static void
861	coro_enq (pTHX_ SV *sv)	866	coro_enq (pTHX_ SV *sv)
862	{	867	{
		868	int prio;
		869
863	if (SvTYPE (sv) == SVt_PVHV)	870	if (SvTYPE (sv) != SVt_PVHV)
864	{
865	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
866	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
867
868	prio = prio > PRIO_MAX ? PRIO_MAX
869	: prio < PRIO_MIN ? PRIO_MIN
870	: prio;
871
872	av_push (coro_ready [prio - PRIO_MIN], sv);
873	coro_nready++;
874
875	return;
876	}
877
878	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++;
879	}	877	}
880		878
881	static SV *	879	static SV *
882	coro_deq (pTHX_ int min_prio)	880	coro_deq (pTHX_ int min_prio)
883	{	881	{
…		…
886	min_prio -= PRIO_MIN;	884	min_prio -= PRIO_MIN;
887	if (min_prio < 0)	885	if (min_prio < 0)
888	min_prio = 0;	886	min_prio = 0;
889		887
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (av_len (coro_ready[prio]) >= 0)	889	if (AvFILLp (coro_ready [prio]) >= 0)
892	{	890	{
893	coro_nready--;	891	coro_nready--;
894	return av_shift (coro_ready[prio]);	892	return av_shift (coro_ready [prio]);
895	}	893	}
896		894
897	return 0;	895	return 0;
898	}	896	}
899		897
…		…
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	907	coro_enq (aTHX_ SvREFCNT_inc (coro));
910	UNLOCK;	908	UNLOCK;
911	}	909	}
912		910
913	static void	911	static void
914	api_schedule (void)	912	prepare_schedule (aTHX_ struct transfer_args *ta)
915	{	913	{
916	dTHX;
917
918	SV *prev, *next;	914	SV *current, *prev, *next;
919		915
920	LOCK;	916	LOCK;
921		917
922	prev = SvRV (GvSV (coro_current));	918	current = GvSV (coro_current);
		919
		920	for (;;)
		921	{
		922	LOCK;
		923
923	next = coro_deq (aTHX_ PRIO_MIN);	924	next = coro_deq (aTHX_ PRIO_MIN);
924		925
925	if (!next)	926	if (next)
926	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;
927		948
928	/* free this only after the transfer */	949	/* free this only after the transfer */
		950	free_coro_mortal ();
929	coro_mortal = prev;	951	coro_mortal = prev;
930	SV_CORO (prev, "Coro::schedule");
931		952
932	SvRV (GvSV (coro_current)) = next;	953	ta->prev = SvSTATE (prev);
933		954	ta->next = SvSTATE (next);
934	SV_CORO (next, "Coro::schedule");	955	ta->flags = TRANSFER_SAVE_ALL;
935		956
936	UNLOCK;	957	UNLOCK;
937
938	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
939	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
940	}	958	}
941		959
942	static void	960	static void
943	api_cede (void)	961	prepare_cede (aTHX_ struct transfer_args *ta)
944	{	962	{
945	dTHX;
946
947	LOCK;	963	LOCK;
948	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
949	UNLOCK;	965	UNLOCK;
950		966
		967	prepare_schedule (ta);
		968	}
		969
		970	static void
951	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);
952	}	988	}
953		989
954	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
955		991
956	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
957		993
958	BOOT:	994	BOOT:
959	{ /* {} necessary for stoopid perl-5.6.x */	995	{
960	#ifdef USE_ITHREADS	996	#ifdef USE_ITHREADS
961	MUTEX_INIT (&coro_mutex);	997	MUTEX_INIT (&coro_mutex);
962	#endif	998	#endif
		999	BOOT_PAGESIZE;
963		1000
964	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
965	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1002
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
971	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
972		1006
973	main_mainstack = PL_mainstack;	1007	main_mainstack = PL_mainstack;
974		1008
975	coroapi.ver = CORO_API_VERSION;	1009	coroapi.ver = CORO_API_VERSION;
976	coroapi.transfer = api_transfer;	1010	coroapi.transfer = api_transfer;
977	}
978		1011
979	Coro::State	1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
980	_newprocess(args)	1013	}
981	SV * args	1014
982	PROTOTYPE: $	1015	SV *
		1016	new (char *klass, ...)
983	CODE:	1017	CODE:
984	Coro__State coro;	1018	{
		1019	struct coro *coro;
		1020	HV *hv;
		1021	int i;
985		1022
986	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
987	croak ("Coro::State::_newprocess expects an arrayref");
988
989	Newz (0, coro, 1, struct coro);	1023	Newz (0, coro, 1, struct coro);
		1024	coro->args = newAV ();
990		1025
991	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
992	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
993	/*coro->stack = 0;*/	1034	/*coro->stack = 0;*/
994		1035	}
995	/* same as JMPENV_BOOTSTRAP */
996	/* we might be able to recycle start_env, but safe is safe */
997	/*Zero(&coro->start_env, 1, JMPENV);*/
998	coro->start_env.je_ret = -1;
999	coro->start_env.je_mustcatch = TRUE;
1000
1001	RETVAL = coro;
1002	OUTPUT:	1036	OUTPUT:
1003	RETVAL	1037	RETVAL
1004		1038
1005	void	1039	void
1006	transfer(prev, next, flags)	1040	_set_stacklevel (...)
1007	SV *prev	1041	ALIAS:
1008	SV *next	1042	Coro::State::transfer = 1
1009	int flags	1043	Coro::schedule = 2
1010	PROTOTYPE: @	1044	Coro::cede = 3
		1045	Coro::Cont::yield = 4
1011	CODE:	1046	CODE:
1012	PUTBACK;	1047	{
1013	SV_CORO (next, "Coro::transfer");	1048	struct transfer_args ta;
1014	SV_CORO (prev, "Coro::transfer");	1049
1015	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1050	switch (ix)
1016	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	}
1017		1103
1018	void	1104	void
1019	DESTROY(coro)	1105	_clone_state_from (SV *dst, SV *src)
1020	Coro::State coro	1106	CODE:
1021	CODE:	1107	{
		1108	struct coro *coro_src = SvSTATE (src);
1022		1109
1023	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1024	{
1025	struct coro temp;
1026		1111
1027	PUTBACK;	1112	++coro_src->refcnt;
1028	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;
1029	LOAD (aTHX_ coro);	1114	}
1030	SPAGAIN;
1031
1032	destroy_stacks (aTHX);
1033
1034	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1035	SPAGAIN;
1036
1037	coro->mainstack = 0;
1038	}
1039
1040	deallocate_stack (coro);
1041	SvREFCNT_dec (coro->args);
1042	Safefree (coro);
1043		1115
1044	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
1045	_exit(code)	1123	_exit (code)
1046	int code	1124	int code
1047	PROTOTYPE: $	1125	PROTOTYPE: $
1048	CODE:	1126	CODE:
1049	_exit (code);	1127	_exit (code);
1050		1128
1051	MODULE = Coro::State PACKAGE = Coro::Cont
1052
1053	# this is slightly dirty (should expose a c-level api)
1054
1055	void
1056	yield(...)
1057	PROTOTYPE: @
1058	CODE:
1059	SV *yieldstack;
1060	SV *sv;
1061	AV *defav = GvAV (PL_defgv);
1062	struct coro *prev, *next;
1063
1064	yieldstack = *hv_fetch (
1065	(HV *)SvRV (GvSV (coro_current)),
1066	"yieldstack", sizeof ("yieldstack") - 1,
1067	0
1068	);
1069
1070	/* set up @_ -- ugly */
1071	av_clear (defav);
1072	av_fill (defav, items - 1);
1073	while (items--)
1074	av_store (defav, items, SvREFCNT_inc (ST(items)));
1075
1076	sv = av_pop ((AV *)SvRV (yieldstack));
1077	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1078	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1079	SvREFCNT_dec (sv);
1080
1081	transfer (aTHX_ prev, next, 0);
1082
1083	MODULE = Coro::State PACKAGE = Coro	1129	MODULE = Coro::State PACKAGE = Coro
1084		1130
1085	# this is slightly dirty (should expose a c-level api)
1086
1087	BOOT:	1131	BOOT:
1088	{	1132	{
1089	int i;	1133	int i;
		1134
1090	HV *stash = gv_stashpv ("Coro", TRUE);	1135	coro_stash = gv_stashpv ("Coro", TRUE);
1091		1136
1092	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1093	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1094	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1095	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1096	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1097	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1098		1143
1099	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1100	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1101		1146
1102	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1110	coroapi.ready = api_ready;	1155	coroapi.ready = api_ready;
1111	coroapi.nready = &coro_nready;	1156	coroapi.nready = &coro_nready;
1112	coroapi.current = coro_current;	1157	coroapi.current = coro_current;
1113		1158
1114	GCoroAPI = &coroapi;	1159	GCoroAPI = &coroapi;
1115	sv_setiv(sv, (IV)&coroapi);	1160	sv_setiv (sv, (IV)&coroapi);
1116	SvREADONLY_on(sv);	1161	SvREADONLY_on (sv);
1117	}	1162	}
1118	}	1163	}
1119		1164
1120	#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	}
1121		1184
1122	void	1185	void
1123	ready(self)	1186	ready (SV *self)
1124	SV * self
1125	PROTOTYPE: $	1187	PROTOTYPE: $
1126	CODE:	1188	CODE:
1127	api_ready (self);	1189	api_ready (self);
1128		1190
1129	#endif
1130
1131	int	1191	int
1132	nready(...)	1192	nready (...)
1133	PROTOTYPE:	1193	PROTOTYPE:
1134	CODE:	1194	CODE:
1135	RETVAL = coro_nready;	1195	RETVAL = coro_nready;
1136	OUTPUT:	1196	OUTPUT:
1137	RETVAL	1197	RETVAL
1138		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
1139	void	1222	void
1140	schedule(...)	1223	_set_state (char *data_)
1141	PROTOTYPE:	1224	PROTOTYPE: $
1142	CODE:	1225	CODE:
1143	api_schedule ();	1226	{
		1227	struct {
		1228	int errorno;
		1229	int laststype;
		1230	int laststatval;
		1231	Stat_t statcache;
		1232	} *data = (void *)data_;
1144		1233
1145	void	1234	errno = data->errorno;
1146	cede(...)	1235	PL_laststype = data->laststype;
1147	PROTOTYPE:	1236	PL_laststatval = data->laststatval;
1148	CODE:	1237	PL_statcache = data->statcache;
1149	api_cede ();	1238	}
1150

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