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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.71 by root, Wed Jan 25 21:43:58 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>
33	#include <signal.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
34		40
35	#ifdef HAVE_MMAP	41	#ifdef HAVE_MMAP
36	# include <unistd.h>	42	# include <unistd.h>
37	# include <sys/mman.h>	43	# include <sys/mman.h>
38	# ifndef MAP_ANONYMOUS	44	# ifndef MAP_ANONYMOUS
…		…
40	# define MAP_ANONYMOUS MAP_ANON	46	# define MAP_ANONYMOUS MAP_ANON
41	# else	47	# else
42	# undef HAVE_MMAP	48	# undef HAVE_MMAP
43	# endif	49	# endif
44	# 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
45	#endif	58	# endif
46		59	#endif
47	#define SUB_INIT "Coro::State::initialize"
48	#define UCORO_STATE "_coro_state"
49		60
50	/* 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
51	* 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
52	* and should be unique. */	63	* and should be unique. */
		64	#define dSTACKLEVEL int stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	65	#define STACKLEVEL ((void *)&stacklevel)
54		66
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	67	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		68
57	#define labs(l) ((l) >= 0 ? (l) : -(l))
58
59	#include "CoroAPI.h"	69	#include "CoroAPI.h"
		70
		71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
60		72
61	#ifdef USE_ITHREADS	73	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	74	static perl_mutex coro_mutex;
63	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
67	# define UNLOCK (void)0	79	# define UNLOCK (void)0
68	#endif	80	#endif
69		81
70	static struct CoroAPI coroapi;	82	static struct CoroAPI coroapi;
71	static AV *main_mainstack; /* used to differentiate between $main and others */	83	static AV *main_mainstack; /* used to differentiate between $main and others */
72	static HV *coro_state_stash;	84	static HV *coro_state_stash, *coro_stash;
73	static SV *ucoro_state_sv;
74	static U32 ucoro_state_hash;
75	static SV *coro_mortal; /* will be freed after next transfer */	85	static SV *coro_mortal; /* will be freed after next transfer */
76		86
77	/* this is actually not only the c stack but also c registers etc... */	87	/* this is a structure representing a c-level coroutine */
78	typedef struct {	88	typedef struct coro_stack {
79	int refcnt; /* pointer reference counter */	89	struct coro_stack *next;
80	int usecnt; /* shared by how many coroutines */
81	int gencnt; /* generation counter */
82		90
83	coro_context cctx;	91	/* the stack */
84
85	void *sptr;	92	void *sptr;
86	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;
87	} coro_stack;	99	} coro_stack;
88		100
		101	/* this is a structure representing a perl-level coroutine */
89	struct coro {	102	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	103	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;
92
93	/* the optional C context */
94	coro_stack *stack;	104	coro_stack *stack;
95	void *cursp;	105
		106	/* data associated with this coroutine (initial args) */
		107	AV *args;
96	int gencnt;	108	int refcnt;
97		109
98	/* optionally saved, might be zero */	110	/* optionally saved, might be zero */
99	AV *defav;	111	AV *defav;
100	SV *defsv;	112	SV *defsv;
101	SV *errsv;	113	SV *errsv;
…		…
131	OP **retstack;	143	OP **retstack;
132	I32 retstack_ix;	144	I32 retstack_ix;
133	I32 retstack_max;	145	I32 retstack_max;
134	PMOP *curpm;	146	PMOP *curpm;
135	COP *curcop;	147	COP *curcop;
136	JMPENV *top_env;
137		148
138	/* data associated with this coroutine (initial args) */	149	/* coro process data */
139	AV *args;	150	int prio;
140	};	151	};
141		152
142	typedef struct coro *Coro__State;	153	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	154	typedef struct coro *Coro__State_or_hashref;
144		155
145	/* mostly copied from op.c:cv_clone2 */	156	static AV *
146	STATIC AV *	157	coro_clone_padlist (CV *cv)
147	clone_padlist (pTHX_ AV *protopadlist)
148	{	158	{
149	AV *av;	159	AV *padlist = CvPADLIST (cv);
150	I32 ix;
151	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
152	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
153	SV **pname = AvARRAY (protopad_name);
154	SV **ppad = AvARRAY (protopad);
155	I32 fname = AvFILLp (protopad_name);
156	I32 fpad = AvFILLp (protopad);
157	AV *newpadlist, *newpad_name, *newpad;	160	AV *newpadlist, *newpad;
158	SV **npad;
159
160	newpad_name = newAV ();
161	for (ix = fname; ix >= 0; ix--)
162	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164	newpad = newAV ();
165	av_fill (newpad, AvFILLp (protopad));
166	npad = AvARRAY (newpad);
167		161
168	newpadlist = newAV ();	162	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	163	AvREAL_off (newpadlist);
170	av_store (newpadlist, 0, (SV *) newpad_name);	164	#if PERL_VERSION < 9
		165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#else
		167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		168	#endif
		169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		170	--AvFILLp (padlist);
		171
		172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171	av_store (newpadlist, 1, (SV *) newpad);	173	av_store (newpadlist, 1, (SV *)newpad);
172
173	av = newAV (); /* will be @_ */
174	av_extend (av, 0);
175	av_store (newpad, 0, (SV *) av);
176	AvREIFY_on (av);
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char *name = SvPVX (namesv); /* XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV *kid = cv_clone((CV*)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		174
242	return newpadlist;	175	return newpadlist;
243	}	176	}
244		177
245	STATIC void	178	static void
246	free_padlist (pTHX_ AV *padlist)	179	free_padlist (AV *padlist)
247	{	180	{
248	/* may be during global destruction */	181	/* may be during global destruction */
249	if (SvREFCNT (padlist))	182	if (SvREFCNT (padlist))
250	{	183	{
251	I32 i = AvFILLp (padlist);	184	I32 i = AvFILLp (padlist);
…		…
264		197
265	SvREFCNT_dec ((SV*)padlist);	198	SvREFCNT_dec ((SV*)padlist);
266	}	199	}
267	}	200	}
268		201
269	STATIC int	202	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	203	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	204	{
272	AV *padlist;	205	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	206	AV *av = (AV *)mg->mg_obj;
274		207
275	/* casting is fun. */	208	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	210	free_padlist (padlist);
278		211
279	SvREFCNT_dec (av);	212	SvREFCNT_dec (av);
		213
		214	return 0;
280	}	215	}
281		216
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	217	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		218
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		220
286	/* the next two functions merely cache the padlists */	221	/* the next two functions merely cache the padlists */
287	STATIC void	222	static void
288	get_padlist (pTHX_ CV *cv)	223	get_padlist (CV *cv)
289	{	224	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291		226
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
294	else	229	else
		230	{
		231	#if 0
		232	/* this is probably cleaner, but also slower? */
		233	CV *cp = Perl_cv_clone (cv);
		234	CvPADLIST (cv) = CvPADLIST (cp);
		235	CvPADLIST (cp) = 0;
		236	SvREFCNT_dec (cp);
		237	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	238	CvPADLIST (cv) = coro_clone_padlist (cv);
		239	#endif
		240	}
296	}	241	}
297		242
298	STATIC void	243	static void
299	put_padlist (pTHX_ CV *cv)	244	put_padlist (CV *cv)
300	{	245	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302		247
303	if (!mg)	248	if (!mg)
304	{	249	{
…		…
312	}	257	}
313		258
314	#define SB do {	259	#define SB do {
315	#define SE } while (0)	260	#define SE } while (0)
316		261
317	#define LOAD(state) load_state(aTHX_ (state));	262	#define LOAD(state) load_state((state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	263	#define SAVE(state,flags) save_state((state),(flags));
319		264
320	#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
321		266
322	static void	267	static void
323	load_state(pTHX_ Coro__State c)	268	load_state(Coro__State c)
324	{	269	{
325	PL_dowarn = c->dowarn;	270	PL_dowarn = c->dowarn;
326	PL_in_eval = c->in_eval;	271	PL_in_eval = c->in_eval;
327		272
328	PL_curstackinfo = c->curstackinfo;	273	PL_curstackinfo = c->curstackinfo;
…		…
346	PL_scopestack_ix = c->scopestack_ix;	291	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;	292	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;	293	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;	294	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;	295	PL_savestack_max = c->savestack_max;
351	#ifdef PL_retstack	296	#if PERL_VERSION < 9
352	PL_retstack = c->retstack;	297	PL_retstack = c->retstack;
353	PL_retstack_ix = c->retstack_ix;	298	PL_retstack_ix = c->retstack_ix;
354	PL_retstack_max = c->retstack_max;	299	PL_retstack_max = c->retstack_max;
355	#endif	300	#endif
356	PL_curpm = c->curpm;	301	PL_curpm = c->curpm;
357	PL_curcop = c->curcop;	302	PL_curcop = c->curcop;
358	PL_top_env = c->top_env;
359		303
360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
363		307
…		…
370	{	314	{
371	AV *padlist = (AV *)POPs;	315	AV *padlist = (AV *)POPs;
372		316
373	if (padlist)	317	if (padlist)
374	{	318	{
375	put_padlist (aTHX_ cv); /* mark this padlist as available */	319	put_padlist (cv); /* mark this padlist as available */
376	CvPADLIST(cv) = padlist;	320	CvPADLIST(cv) = padlist;
377	}	321	}
378		322
379	++CvDEPTH(cv);	323	++CvDEPTH(cv);
380	}	324	}
…		…
382	PUTBACK;	326	PUTBACK;
383	}	327	}
384	}	328	}
385		329
386	static void	330	static void
387	save_state(pTHX_ Coro__State c, int flags)	331	save_state(Coro__State c, int flags)
388	{	332	{
389	{	333	{
390	dSP;	334	dSP;
391	I32 cxix = cxstack_ix;	335	I32 cxix = cxstack_ix;
392	PERL_CONTEXT *ccstk = cxstack;	336	PERL_CONTEXT *ccstk = cxstack;
…		…
420	}	364	}
421		365
422	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST(cv));
423	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
424		368
425	get_padlist (aTHX_ cv); /* this is a monster */	369	get_padlist (cv);
426	}	370	}
427	}	371	}
428	#ifdef CXt_FORMAT	372	#ifdef CXt_FORMAT
429	else if (CxTYPE(cx) == CXt_FORMAT)	373	else if (CxTYPE(cx) == CXt_FORMAT)
430	{	374	{
…		…
474	c->scopestack_ix = PL_scopestack_ix;	418	c->scopestack_ix = PL_scopestack_ix;
475	c->scopestack_max = PL_scopestack_max;	419	c->scopestack_max = PL_scopestack_max;
476	c->savestack = PL_savestack;	420	c->savestack = PL_savestack;
477	c->savestack_ix = PL_savestack_ix;	421	c->savestack_ix = PL_savestack_ix;
478	c->savestack_max = PL_savestack_max;	422	c->savestack_max = PL_savestack_max;
479	#ifdef PL_retstack	423	#if PERL_VERSION < 9
480	c->retstack = PL_retstack;	424	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;	425	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;	426	c->retstack_max = PL_retstack_max;
483	#endif	427	#endif
484	c->curpm = PL_curpm;	428	c->curpm = PL_curpm;
485	c->curcop = PL_curcop;	429	c->curcop = PL_curcop;
486	c->top_env = PL_top_env;
487	}	430	}
488		431
489	/*	432	/*
490	* allocate various perl stacks. This is an exact copy	433	* allocate various perl stacks. This is an exact copy
491	* of perl.c:init_stacks, except that it uses less memory	434	* of perl.c:init_stacks, except that it uses less memory
492	* on the (sometimes correct) assumption that coroutines do	435	* on the (sometimes correct) assumption that coroutines do
493	* not usually need a lot of stackspace.	436	* not usually need a lot of stackspace.
494	*/	437	*/
495	STATIC void	438	static void
496	coro_init_stacks (pTHX)	439	coro_init_stacks ()
497	{	440	{
498	LOCK;
499
500	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501	PL_curstackinfo->si_type = PERLSI_MAIN;	442	PL_curstackinfo->si_type = PERLSI_MAIN;
502	PL_curstack = PL_curstackinfo->si_stack;	443	PL_curstack = PL_curstackinfo->si_stack;
503	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504		445
…		…
525		466
526	New(54,PL_savestack,96,ANY);	467	New(54,PL_savestack,96,ANY);
527	PL_savestack_ix = 0;	468	PL_savestack_ix = 0;
528	PL_savestack_max = 96;	469	PL_savestack_max = 96;
529		470
530	#ifdef PL_retstack	471	#if PERL_VERSION < 9
531	New(54,PL_retstack,8,OP*);	472	New(54,PL_retstack,8,OP*);
532	PL_retstack_ix = 0;	473	PL_retstack_ix = 0;
533	PL_retstack_max = 8;	474	PL_retstack_max = 8;
534	#endif	475	#endif
535
536	UNLOCK;
537	}	476	}
538		477
539	/*	478	/*
540	* destroy the stacks, the callchain etc...	479	* destroy the stacks, the callchain etc...
541	*/	480	*/
542	STATIC void	481	static void
543	destroy_stacks(pTHX)	482	destroy_stacks()
544	{	483	{
545	if (!IN_DESTRUCT)	484	if (!IN_DESTRUCT)
546	{	485	{
547	/* is this ugly, I ask? */	486	/* is this ugly, I ask? */
548	LEAVE_SCOPE (0);	487	LEAVE_SCOPE (0);
…		…
579		518
580	Safefree (PL_tmps_stack);	519	Safefree (PL_tmps_stack);
581	Safefree (PL_markstack);	520	Safefree (PL_markstack);
582	Safefree (PL_scopestack);	521	Safefree (PL_scopestack);
583	Safefree (PL_savestack);	522	Safefree (PL_savestack);
584	#ifdef PL_retstack	523	#if PERL_VERSION < 9
585	Safefree (PL_retstack);	524	Safefree (PL_retstack);
586	#endif	525	#endif
587	}	526	}
588		527
589	static void	528	static void
590	allocate_stack (Coro__State ctx, int alloc)	529	setup_coro (struct coro *coro)
591	{
592	coro_stack *stack;
593
594	New (0, stack, 1, coro_stack);
595
596	stack->refcnt = 1;
597	stack->usecnt = 1;
598	stack->gencnt = ctx->gencnt = 0;
599
600	if (alloc)
601	{
602	#if HAVE_MMAP
603	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605	if (stack->sptr == (void *)-1)
606	#endif
607	{
608	/*FIXME*//*D*//* reasonable stack size! */
609	stack->ssize = - (STACKSIZE * sizeof (long));
610	New (0, stack->sptr, STACKSIZE, long);
611	}
612	}
613	else
614	stack->sptr = 0;
615
616	ctx->stack = stack;
617	}
618
619	static void
620	deallocate_stack (Coro__State ctx)
621	{
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{
628	if (!--stack->refcnt)
629	{
630	#ifdef HAVE_MMAP
631	if (stack->ssize > 0 && stack->sptr)
632	munmap (stack->sptr, stack->ssize);
633	else
634	#endif
635	Safefree (stack->sptr);
636
637	Safefree (stack);
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}
643
644	static void
645	setup_coro (void *arg)
646	{	530	{
647	/*	531	/*
648	* emulate part of the perl startup here.	532	* emulate part of the perl startup here.
649	*/	533	*/
650	dTHX;	534	dTHX;
651	dSP;	535	dSP;
652	Coro__State ctx = (Coro__State)arg;	536	UNOP myop;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
654		538
655	coro_init_stacks (aTHX);	539	coro_init_stacks ();
656	/*PL_curcop = 0;*/	540	/*PL_curcop = 0;*/
657	/*PL_in_eval = PL_in_eval;*/ /* inherit */	541	/*PL_in_eval = PL_in_eval;*/ /* inherit */
658	SvREFCNT_dec (GvAV (PL_defgv));	542	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	543	GvAV (PL_defgv) = coro->args; coro->args = 0;
660		544
661	SPAGAIN;	545	SPAGAIN;
662		546
663	if (ctx->stack)
664	{
665	ctx->cursp = 0;
666
667	PUSHMARK(SP);
668	PUTBACK;
669	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671	if (SvTRUE (ERRSV))
672	croak (NULL);
673	else
674	croak ("FATAL: CCTXT coroutine returned!");
675	}
676	else
677	{
678	UNOP myop;
679
680	PL_op = (OP *)&myop;
681
682	Zero(&myop, 1, UNOP);	547	Zero (&myop, 1, UNOP);
683	myop.op_next = Nullop;	548	myop.op_next = Nullop;
684	myop.op_flags = OPf_WANT_VOID;	549	myop.op_flags = OPf_WANT_VOID;
685		550
		551	PL_op = (OP *)&myop;
		552
686	PUSHMARK(SP);	553	PUSHMARK(SP);
687	XPUSHs (sub_init);	554	XPUSHs (sub_init);
688	/*
689	* the next line is slightly wrong, as PL_op->op_next
690	* is actually being executed so we skip the first op.
691	* that doesn't matter, though, since it is only
692	* pp_nextstate and we never return...
693	* ah yes, and I don't care anyways ;)
694	*/
695	PUTBACK;	555	PUTBACK;
696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697	SPAGAIN;	557	SPAGAIN;
698		558
699	ENTER; /* necessary e.g. for dounwind */	559	ENTER; /* necessary e.g. for dounwind */
700	}
701	}	560	}
702		561
703	static void	562	static void
704	continue_coro (void *arg)	563	free_coro_mortal ()
705	{	564	{
706	/*
707	* this is a _very_ stripped down perl interpreter ;)
708	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711	JMPENV coro_start_env;
712
713	PL_top_env = &ctx->start_env;
714
715	ctx->cursp = 0;
716	PL_op = PL_op->op_next;
717	CALLRUNOPS(aTHX);
718
719	abort ();
720	}
721
722	STATIC void
723	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724	{
725	dSTACKLEVEL;
726
727	if (prev != next)
728	{
729	if (next->mainstack)
730	{
731	LOCK;
732	SAVE (prev, flags);
733	LOAD (next);
734	UNLOCK;
735
736	/* mark this state as in-use */
737	next->mainstack = 0;
738	next->tmps_ix = -2;
739
740	/* stacklevel changed? if yes, grab the stack for us! */
741	if (flags & TRANSFER_SAVE_CCTXT)
742	{
743	if (!prev->stack)
744	allocate_stack (prev, 0);
745	else if (prev->cursp != stacklevel
746	&& prev->stack->usecnt > 1)
747	{
748	prev->gencnt = ++prev->stack->gencnt;
749	prev->stack->usecnt = 1;
750	}
751
752	/* has our stack been invalidated? */
753	if (next->stack && next->stack->gencnt != next->gencnt)
754	{
755	deallocate_stack (next);
756	allocate_stack (next, 1);
757	coro_create (&(next->stack->cctx),
758	continue_coro, (void *)next,
759	next->stack->sptr, labs (next->stack->ssize));
760	}
761
762	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763	prev->cursp = stacklevel;
764	/* don't add any code here */
765	}
766	else
767	next->cursp = stacklevel;
768	}
769	else if (next->tmps_ix == -2)
770	croak ("tried to transfer to running coroutine");
771	else
772	{
773	LOCK;
774	SAVE (prev, -1); /* first get rid of the old state */
775	UNLOCK;
776
777	if (flags & TRANSFER_SAVE_CCTXT)
778	{
779	if (!prev->stack)
780	allocate_stack (prev, 0);
781
782	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783	{
784	PL_top_env = &next->start_env;
785
786	setup_coro (next);
787	next->cursp = stacklevel;
788
789	prev->stack->refcnt++;
790	prev->stack->usecnt++;
791	next->stack = prev->stack;
792	next->gencnt = prev->gencnt;
793	}
794	else
795	{
796	assert (!next->stack);
797	allocate_stack (next, 1);
798	coro_create (&(next->stack->cctx),
799	setup_coro, (void *)next,
800	next->stack->sptr, labs (next->stack->ssize));
801	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802	prev->cursp = stacklevel;
803	/* don't add any code here */
804	}
805	}
806	else
807	{
808	setup_coro (next);
809	next->cursp = stacklevel;
810	}
811	}
812	}
813
814	LOCK;
815	if (coro_mortal)	565	if (coro_mortal)
816	{	566	{
817	SvREFCNT_dec (coro_mortal);	567	SvREFCNT_dec (coro_mortal);
818	coro_mortal = 0;	568	coro_mortal = 0;
819	}	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	*/
820	UNLOCK;	597	UNLOCK;
821	}
822		598
823	#define SV_CORO(sv,func) \	599	PL_top_env = &PL_start_env;
824	do { \	600	prepare_cctx ((coro_stack *)arg);
825	if (SvROK (sv)) \
826	sv = SvRV (sv); \
827	\
828	if (SvTYPE (sv) == SVt_PVHV) \
829	{ \
830	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831	\
832	if (!he) \
833	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834	\
835	(sv) = SvRV (HeVAL(he)); \
836	} \
837	\
838	/* must also be changed inside Coro::Cont::yield */ \
839	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841	\
842	} while(0)
843		601
844	#define SvSTATE(sv) (struct coro *)SvIV (sv)	602	/* somebody will hit me for both perl_run and PL_restartop */
		603	perl_run (PERL_GET_CONTEXT);
845		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
846	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
847	api_transfer(pTHX_ SV *prev, SV *next, int flags)	846	api_transfer (SV *prev, SV *next, int flags)
848	{	847	{
849	SV_CORO (prev, "Coro::transfer");	848	dTHX;
850	SV_CORO (next, "Coro::transfer");	849	struct transfer_args ta;
851		850
852	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	851	prepare_transfer (&ta, prev, next, flags);
		852	TRANSFER (ta);
853	}	853	}
854		854
855	/** Coro ********************************************************************/	855	/** Coro ********************************************************************/
856		856
857	#define PRIO_MAX 3	857	#define PRIO_MAX 3
…		…
861	#define PRIO_IDLE -3	861	#define PRIO_IDLE -3
862	#define PRIO_MIN -4	862	#define PRIO_MIN -4
863		863
864	/* for Coro.pm */	864	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;	865	static GV *coro_current, *coro_idle;
866	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;	867	static int coro_nready;
868		868
869	static void	869	static void
870	coro_enq (pTHX_ SV *sv)	870	coro_enq (SV *sv)
871	{	871	{
		872	int prio;
		873
872	if (SvTYPE (sv) == SVt_PVHV)	874	if (SvTYPE (sv) != SVt_PVHV)
873	{
874	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
875	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
876
877	prio = prio > PRIO_MAX ? PRIO_MAX
878	: prio < PRIO_MIN ? PRIO_MIN
879	: prio;
880
881	av_push (coro_ready [prio - PRIO_MIN], sv);
882	coro_nready++;
883
884	return;
885	}
886
887	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");
		876
		877	prio = SvSTATE (sv)->prio;
		878
		879	av_push (coro_ready [prio - PRIO_MIN], sv);
		880	coro_nready++;
888	}	881	}
889		882
890	static SV *	883	static SV *
891	coro_deq (pTHX_ int min_prio)	884	coro_deq (int min_prio)
892	{	885	{
893	int prio = PRIO_MAX - PRIO_MIN;	886	int prio = PRIO_MAX - PRIO_MIN;
894		887
895	min_prio -= PRIO_MIN;	888	min_prio -= PRIO_MIN;
896	if (min_prio < 0)	889	if (min_prio < 0)
897	min_prio = 0;	890	min_prio = 0;
898		891
899	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
900	if (av_len (coro_ready[prio]) >= 0)	893	if (AvFILLp (coro_ready [prio]) >= 0)
901	{	894	{
902	coro_nready--;	895	coro_nready--;
903	return av_shift (coro_ready[prio]);	896	return av_shift (coro_ready [prio]);
904	}	897	}
905		898
906	return 0;	899	return 0;
907	}	900	}
908		901
…		…
913		906
914	if (SvROK (coro))	907	if (SvROK (coro))
915	coro = SvRV (coro);	908	coro = SvRV (coro);
916		909
917	LOCK;	910	LOCK;
918	coro_enq (aTHX_ SvREFCNT_inc (coro));	911	coro_enq (SvREFCNT_inc (coro));
919	UNLOCK;	912	UNLOCK;
920	}	913	}
921		914
922	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
923	api_schedule (void)	971	api_schedule (void)
924	{	972	{
925	dTHX;	973	dTHX;
		974	struct transfer_args ta;
926		975
927	SV *prev, *next;	976	prepare_schedule (&ta);
928		977	TRANSFER (ta);
929	LOCK;
930
931	prev = SvRV (GvSV (coro_current));
932	next = coro_deq (aTHX_ PRIO_MIN);
933
934	if (!next)
935	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
936
937	/* free this only after the transfer */
938	coro_mortal = prev;
939	SV_CORO (prev, "Coro::schedule");
940
941	SvRV (GvSV (coro_current)) = next;
942
943	SV_CORO (next, "Coro::schedule");
944
945	UNLOCK;
946
947	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
948	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
949	}	978	}
950		979
951	static void	980	static void
952	api_cede (void)	981	api_cede (void)
953	{	982	{
954	dTHX;	983	dTHX;
		984	struct transfer_args ta;
955		985
956	LOCK;	986	prepare_cede (&ta);
957	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	987	TRANSFER (ta);
958	UNLOCK;
959
960	api_schedule ();
961	}	988	}
962		989
963	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
964		991
965	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
966		993
967	BOOT:	994	BOOT:
968	{ /* {} necessary for stoopid perl-5.6.x */	995	{
969	#ifdef USE_ITHREADS	996	#ifdef USE_ITHREADS
970	MUTEX_INIT (&coro_mutex);	997	MUTEX_INIT (&coro_mutex);
971	#endif	998	#endif
		999	BOOT_PAGESIZE;
972		1000
973	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
974	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
975	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
976		1002
977	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
978	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
979	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
980	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
981		1006
982	main_mainstack = PL_mainstack;	1007	main_mainstack = PL_mainstack;
983		1008
984	coroapi.ver = CORO_API_VERSION;	1009	coroapi.ver = CORO_API_VERSION;
985	coroapi.transfer = api_transfer;	1010	coroapi.transfer = api_transfer;
986	}
987		1011
988	Coro::State	1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
989	_newprocess(args)	1013	}
990	SV * args	1014
991	PROTOTYPE: $	1015	SV *
		1016	new (char *klass, ...)
992	CODE:	1017	CODE:
993	Coro__State coro;	1018	{
		1019	struct coro *coro;
		1020	HV *hv;
		1021	int i;
994		1022
995	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
996	croak ("Coro::State::_newprocess expects an arrayref");
997
998	Newz (0, coro, 1, struct coro);	1023	Newz (0, coro, 1, struct coro);
		1024	coro->args = newAV ();
999		1025
1000	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
1001	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1002	/*coro->stack = 0;*/	1034	/*coro->stack = 0;*/
1003		1035	}
1004	/* same as JMPENV_BOOTSTRAP */
1005	/* we might be able to recycle start_env, but safe is safe */
1006	/*Zero(&coro->start_env, 1, JMPENV);*/
1007	coro->start_env.je_ret = -1;
1008	coro->start_env.je_mustcatch = TRUE;
1009
1010	RETVAL = coro;
1011	OUTPUT:	1036	OUTPUT:
1012	RETVAL	1037	RETVAL
1013		1038
1014	void	1039	void
1015	transfer(prev, next, flags)	1040	_set_stacklevel (...)
1016	SV *prev	1041	ALIAS:
1017	SV *next	1042	Coro::State::transfer = 1
1018	int flags	1043	Coro::schedule = 2
1019	PROTOTYPE: @	1044	Coro::cede = 3
		1045	Coro::Cont::yield = 4
1020	CODE:	1046	CODE:
1021	PUTBACK;	1047	{
1022	SV_CORO (next, "Coro::transfer");	1048	struct transfer_args ta;
1023	SV_CORO (prev, "Coro::transfer");	1049
1024	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1050	switch (ix)
1025	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	}
1026		1103
1027	void	1104	void
1028	DESTROY(coro)	1105	_clone_state_from (SV *dst, SV *src)
1029	Coro::State coro	1106	CODE:
1030	CODE:	1107	{
		1108	struct coro *coro_src = SvSTATE (src);
1031		1109
1032	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1033	{
1034	struct coro temp;
1035		1111
1036	PUTBACK;	1112	++coro_src->refcnt;
1037	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;
1038	LOAD (aTHX_ coro);	1114	}
1039	SPAGAIN;
1040
1041	destroy_stacks (aTHX);
1042
1043	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1044	SPAGAIN;
1045
1046	coro->mainstack = 0;
1047	}
1048
1049	deallocate_stack (coro);
1050	SvREFCNT_dec (coro->args);
1051	Safefree (coro);
1052		1115
1053	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
1054	_exit(code)	1123	_exit (code)
1055	int code	1124	int code
1056	PROTOTYPE: $	1125	PROTOTYPE: $
1057	CODE:	1126	CODE:
1058	_exit (code);	1127	_exit (code);
1059		1128
1060	MODULE = Coro::State PACKAGE = Coro::Cont
1061
1062	# this is slightly dirty (should expose a c-level api)
1063
1064	void
1065	yield(...)
1066	PROTOTYPE: @
1067	CODE:
1068	SV *yieldstack;
1069	SV *sv;
1070	AV *defav = GvAV (PL_defgv);
1071	struct coro *prev, *next;
1072
1073	yieldstack = *hv_fetch (
1074	(HV *)SvRV (GvSV (coro_current)),
1075	"yieldstack", sizeof ("yieldstack") - 1,
1076	0
1077	);
1078
1079	/* set up @_ -- ugly */
1080	av_clear (defav);
1081	av_fill (defav, items - 1);
1082	while (items--)
1083	av_store (defav, items, SvREFCNT_inc (ST(items)));
1084
1085	sv = av_pop ((AV *)SvRV (yieldstack));
1086	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1087	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1088	SvREFCNT_dec (sv);
1089
1090	transfer (aTHX_ prev, next, 0);
1091
1092	MODULE = Coro::State PACKAGE = Coro	1129	MODULE = Coro::State PACKAGE = Coro
1093		1130
1094	# this is slightly dirty (should expose a c-level api)
1095
1096	BOOT:	1131	BOOT:
1097	{	1132	{
1098	int i;	1133	int i;
		1134
1099	HV *stash = gv_stashpv ("Coro", TRUE);	1135	coro_stash = gv_stashpv ("Coro", TRUE);
1100		1136
1101	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1102	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1103	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1104	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1105	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1106	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1107		1143
1108	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1109	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1110		1146
1111	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1119	coroapi.ready = api_ready;	1155	coroapi.ready = api_ready;
1120	coroapi.nready = &coro_nready;	1156	coroapi.nready = &coro_nready;
1121	coroapi.current = coro_current;	1157	coroapi.current = coro_current;
1122		1158
1123	GCoroAPI = &coroapi;	1159	GCoroAPI = &coroapi;
1124	sv_setiv(sv, (IV)&coroapi);	1160	sv_setiv (sv, (IV)&coroapi);
1125	SvREADONLY_on(sv);	1161	SvREADONLY_on (sv);
1126	}	1162	}
1127	}	1163	}
1128		1164
1129	#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	}
1130		1184
1131	void	1185	void
1132	ready(self)	1186	ready (SV *self)
1133	SV * self
1134	PROTOTYPE: $	1187	PROTOTYPE: $
1135	CODE:	1188	CODE:
1136	api_ready (self);	1189	api_ready (self);
1137		1190
1138	#endif
1139
1140	int	1191	int
1141	nready(...)	1192	nready (...)
1142	PROTOTYPE:	1193	PROTOTYPE:
1143	CODE:	1194	CODE:
1144	RETVAL = coro_nready;	1195	RETVAL = coro_nready;
1145	OUTPUT:	1196	OUTPUT:
1146	RETVAL	1197	RETVAL
1147		1198
1148	void	1199	MODULE = Coro::State PACKAGE = Coro::AIO
1149	schedule(...)
1150	PROTOTYPE:
1151	CODE:
1152	api_schedule ();
1153		1200
1154	void
1155	cede(...)
1156	PROTOTYPE:
1157	CODE:
1158	api_cede ();
1159
1160	# and these are hacks
1161	SV *	1201	SV *
1162	_aio_get_state ()	1202	_get_state ()
1163	CODE:	1203	CODE:
1164	{	1204	{
1165	struct {	1205	struct {
1166	int errorno;	1206	int errorno;
1167	int laststype;	1207	int laststype;
…		…
1178	}	1218	}
1179	OUTPUT:	1219	OUTPUT:
1180	RETVAL	1220	RETVAL
1181		1221
1182	void	1222	void
1183	_aio_set_state (char *data_)	1223	_set_state (char *data_)
1184	PROTOTYPE: $	1224	PROTOTYPE: $
1185	CODE:	1225	CODE:
1186	{	1226	{
1187	struct {	1227	struct {
1188	int errorno;	1228	int errorno;

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