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Comparing Coro/Coro/State.xs (file contents):
Revision 1.70 by root, Mon Dec 26 19:26:52 2005 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	AvFLAGS (av) = AVf_REIFY;
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;
		296	#if PERL_VERSION < 9
351	PL_retstack = c->retstack;	297	PL_retstack = c->retstack;
352	PL_retstack_ix = c->retstack_ix;	298	PL_retstack_ix = c->retstack_ix;
353	PL_retstack_max = c->retstack_max;	299	PL_retstack_max = c->retstack_max;
		300	#endif
354	PL_curpm = c->curpm;	301	PL_curpm = c->curpm;
355	PL_curcop = c->curcop;	302	PL_curcop = c->curcop;
356	PL_top_env = c->top_env;
357		303
358	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
359	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
360	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
361		307
…		…
368	{	314	{
369	AV *padlist = (AV *)POPs;	315	AV *padlist = (AV *)POPs;
370		316
371	if (padlist)	317	if (padlist)
372	{	318	{
373	put_padlist (aTHX_ cv); /* mark this padlist as available */	319	put_padlist (cv); /* mark this padlist as available */
374	CvPADLIST(cv) = padlist;	320	CvPADLIST(cv) = padlist;
375	}	321	}
376		322
377	++CvDEPTH(cv);	323	++CvDEPTH(cv);
378	}	324	}
…		…
380	PUTBACK;	326	PUTBACK;
381	}	327	}
382	}	328	}
383		329
384	static void	330	static void
385	save_state(pTHX_ Coro__State c, int flags)	331	save_state(Coro__State c, int flags)
386	{	332	{
387	{	333	{
388	dSP;	334	dSP;
389	I32 cxix = cxstack_ix;	335	I32 cxix = cxstack_ix;
390	PERL_CONTEXT *ccstk = cxstack;	336	PERL_CONTEXT *ccstk = cxstack;
…		…
418	}	364	}
419		365
420	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST(cv));
421	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
422		368
423	get_padlist (aTHX_ cv); /* this is a monster */	369	get_padlist (cv);
424	}	370	}
425	}	371	}
426	#ifdef CXt_FORMAT	372	#ifdef CXt_FORMAT
427	else if (CxTYPE(cx) == CXt_FORMAT)	373	else if (CxTYPE(cx) == CXt_FORMAT)
428	{	374	{
…		…
472	c->scopestack_ix = PL_scopestack_ix;	418	c->scopestack_ix = PL_scopestack_ix;
473	c->scopestack_max = PL_scopestack_max;	419	c->scopestack_max = PL_scopestack_max;
474	c->savestack = PL_savestack;	420	c->savestack = PL_savestack;
475	c->savestack_ix = PL_savestack_ix;	421	c->savestack_ix = PL_savestack_ix;
476	c->savestack_max = PL_savestack_max;	422	c->savestack_max = PL_savestack_max;
		423	#if PERL_VERSION < 9
477	c->retstack = PL_retstack;	424	c->retstack = PL_retstack;
478	c->retstack_ix = PL_retstack_ix;	425	c->retstack_ix = PL_retstack_ix;
479	c->retstack_max = PL_retstack_max;	426	c->retstack_max = PL_retstack_max;
		427	#endif
480	c->curpm = PL_curpm;	428	c->curpm = PL_curpm;
481	c->curcop = PL_curcop;	429	c->curcop = PL_curcop;
482	c->top_env = PL_top_env;
483	}	430	}
484		431
485	/*	432	/*
486	* allocate various perl stacks. This is an exact copy	433	* allocate various perl stacks. This is an exact copy
487	* of perl.c:init_stacks, except that it uses less memory	434	* of perl.c:init_stacks, except that it uses less memory
488	* on the (sometimes correct) assumption that coroutines do	435	* on the (sometimes correct) assumption that coroutines do
489	* not usually need a lot of stackspace.	436	* not usually need a lot of stackspace.
490	*/	437	*/
491	STATIC void	438	static void
492	coro_init_stacks (pTHX)	439	coro_init_stacks ()
493	{	440	{
494	LOCK;
495
496	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
497	PL_curstackinfo->si_type = PERLSI_MAIN;	442	PL_curstackinfo->si_type = PERLSI_MAIN;
498	PL_curstack = PL_curstackinfo->si_stack;	443	PL_curstack = PL_curstackinfo->si_stack;
499	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
500		445
…		…
521		466
522	New(54,PL_savestack,96,ANY);	467	New(54,PL_savestack,96,ANY);
523	PL_savestack_ix = 0;	468	PL_savestack_ix = 0;
524	PL_savestack_max = 96;	469	PL_savestack_max = 96;
525		470
		471	#if PERL_VERSION < 9
526	New(54,PL_retstack,8,OP*);	472	New(54,PL_retstack,8,OP*);
527	PL_retstack_ix = 0;	473	PL_retstack_ix = 0;
528	PL_retstack_max = 8;	474	PL_retstack_max = 8;
529		475	#endif
530	UNLOCK;
531	}	476	}
532		477
533	/*	478	/*
534	* destroy the stacks, the callchain etc...	479	* destroy the stacks, the callchain etc...
535	*/	480	*/
536	STATIC void	481	static void
537	destroy_stacks(pTHX)	482	destroy_stacks()
538	{	483	{
539	if (!IN_DESTRUCT)	484	if (!IN_DESTRUCT)
540	{	485	{
541	/* is this ugly, I ask? */	486	/* is this ugly, I ask? */
542	LEAVE_SCOPE (0);	487	LEAVE_SCOPE (0);
…		…
573		518
574	Safefree (PL_tmps_stack);	519	Safefree (PL_tmps_stack);
575	Safefree (PL_markstack);	520	Safefree (PL_markstack);
576	Safefree (PL_scopestack);	521	Safefree (PL_scopestack);
577	Safefree (PL_savestack);	522	Safefree (PL_savestack);
		523	#if PERL_VERSION < 9
578	Safefree (PL_retstack);	524	Safefree (PL_retstack);
579	}
580
581	static void
582	allocate_stack (Coro__State ctx, int alloc)
583	{
584	coro_stack *stack;
585
586	New (0, stack, 1, coro_stack);
587
588	stack->refcnt = 1;
589	stack->usecnt = 1;
590	stack->gencnt = ctx->gencnt = 0;
591
592	if (alloc)
593	{
594	#if HAVE_MMAP
595	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
596	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
597	if (stack->sptr == (void *)-1)
598	#endif	525	#endif
599	{
600	/*FIXME*//*D*//* reasonable stack size! */
601	stack->ssize = - (STACKSIZE * sizeof (long));
602	New (0, stack->sptr, STACKSIZE, long);
603	}
604	}
605	else
606	stack->sptr = 0;
607
608	ctx->stack = stack;
609	}	526	}
610		527
611	static void	528	static void
612	deallocate_stack (Coro__State ctx)	529	setup_coro (struct coro *coro)
613	{
614	coro_stack *stack = ctx->stack;
615
616	ctx->stack = 0;
617
618	if (stack)
619	{
620	if (!--stack->refcnt)
621	{
622	#ifdef HAVE_MMAP
623	if (stack->ssize > 0 && stack->sptr)
624	munmap (stack->sptr, stack->ssize);
625	else
626	#endif
627	Safefree (stack->sptr);
628
629	Safefree (stack);
630	}
631	else if (ctx->gencnt == stack->gencnt)
632	--stack->usecnt;
633	}
634	}
635
636	static void
637	setup_coro (void *arg)
638	{	530	{
639	/*	531	/*
640	* emulate part of the perl startup here.	532	* emulate part of the perl startup here.
641	*/	533	*/
642	dTHX;	534	dTHX;
643	dSP;	535	dSP;
644	Coro__State ctx = (Coro__State)arg;	536	UNOP myop;
645	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
646		538
647	coro_init_stacks (aTHX);	539	coro_init_stacks ();
648	/*PL_curcop = 0;*/	540	/*PL_curcop = 0;*/
649	/*PL_in_eval = PL_in_eval;*/ /* inherit */	541	/*PL_in_eval = PL_in_eval;*/ /* inherit */
650	SvREFCNT_dec (GvAV (PL_defgv));	542	SvREFCNT_dec (GvAV (PL_defgv));
651	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	543	GvAV (PL_defgv) = coro->args; coro->args = 0;
652		544
653	SPAGAIN;	545	SPAGAIN;
654		546
655	if (ctx->stack)
656	{
657	ctx->cursp = 0;
658
659	PUSHMARK(SP);
660	PUTBACK;
661	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
662
663	if (SvTRUE (ERRSV))
664	croak (NULL);
665	else
666	croak ("FATAL: CCTXT coroutine returned!");
667	}
668	else
669	{
670	UNOP myop;
671
672	PL_op = (OP *)&myop;
673
674	Zero(&myop, 1, UNOP);	547	Zero (&myop, 1, UNOP);
675	myop.op_next = Nullop;	548	myop.op_next = Nullop;
676	myop.op_flags = OPf_WANT_VOID;	549	myop.op_flags = OPf_WANT_VOID;
677		550
		551	PL_op = (OP *)&myop;
		552
678	PUSHMARK(SP);	553	PUSHMARK(SP);
679	XPUSHs (sub_init);	554	XPUSHs (sub_init);
680	/*
681	* the next line is slightly wrong, as PL_op->op_next
682	* is actually being executed so we skip the first op.
683	* that doesn't matter, though, since it is only
684	* pp_nextstate and we never return...
685	* ah yes, and I don't care anyways ;)
686	*/
687	PUTBACK;	555	PUTBACK;
688	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
689	SPAGAIN;	557	SPAGAIN;
690		558
691	ENTER; /* necessary e.g. for dounwind */	559	ENTER; /* necessary e.g. for dounwind */
692	}
693	}	560	}
694		561
695	static void	562	static void
696	continue_coro (void *arg)	563	free_coro_mortal ()
697	{	564	{
698	/*
699	* this is a _very_ stripped down perl interpreter ;)
700	*/
701	dTHX;
702	Coro__State ctx = (Coro__State)arg;
703	JMPENV coro_start_env;
704
705	PL_top_env = &ctx->start_env;
706
707	ctx->cursp = 0;
708	PL_op = PL_op->op_next;
709	CALLRUNOPS(aTHX);
710
711	abort ();
712	}
713
714	STATIC void
715	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
716	{
717	dSTACKLEVEL;
718
719	if (prev != next)
720	{
721	if (next->mainstack)
722	{
723	LOCK;
724	SAVE (prev, flags);
725	LOAD (next);
726	UNLOCK;
727
728	/* mark this state as in-use */
729	next->mainstack = 0;
730	next->tmps_ix = -2;
731
732	/* stacklevel changed? if yes, grab the stack for us! */
733	if (flags & TRANSFER_SAVE_CCTXT)
734	{
735	if (!prev->stack)
736	allocate_stack (prev, 0);
737	else if (prev->cursp != stacklevel
738	&& prev->stack->usecnt > 1)
739	{
740	prev->gencnt = ++prev->stack->gencnt;
741	prev->stack->usecnt = 1;
742	}
743
744	/* has our stack been invalidated? */
745	if (next->stack && next->stack->gencnt != next->gencnt)
746	{
747	deallocate_stack (next);
748	allocate_stack (next, 1);
749	coro_create (&(next->stack->cctx),
750	continue_coro, (void *)next,
751	next->stack->sptr, labs (next->stack->ssize));
752	}
753
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	else
759	next->cursp = stacklevel;
760	}
761	else if (next->tmps_ix == -2)
762	croak ("tried to transfer to running coroutine");
763	else
764	{
765	LOCK;
766	SAVE (prev, -1); /* first get rid of the old state */
767	UNLOCK;
768
769	if (flags & TRANSFER_SAVE_CCTXT)
770	{
771	if (!prev->stack)
772	allocate_stack (prev, 0);
773
774	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
775	{
776	PL_top_env = &next->start_env;
777
778	setup_coro (next);
779	next->cursp = stacklevel;
780
781	prev->stack->refcnt++;
782	prev->stack->usecnt++;
783	next->stack = prev->stack;
784	next->gencnt = prev->gencnt;
785	}
786	else
787	{
788	assert (!next->stack);
789	allocate_stack (next, 1);
790	coro_create (&(next->stack->cctx),
791	setup_coro, (void *)next,
792	next->stack->sptr, labs (next->stack->ssize));
793	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
794	prev->cursp = stacklevel;
795	/* don't add any code here */
796	}
797	}
798	else
799	{
800	setup_coro (next);
801	next->cursp = stacklevel;
802	}
803	}
804	}
805
806	LOCK;
807	if (coro_mortal)	565	if (coro_mortal)
808	{	566	{
809	SvREFCNT_dec (coro_mortal);	567	SvREFCNT_dec (coro_mortal);
810	coro_mortal = 0;	568	coro_mortal = 0;
811	}	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	*/
812	UNLOCK;	597	UNLOCK;
813	}
814		598
815	#define SV_CORO(sv,func) \	599	PL_top_env = &PL_start_env;
816	do { \	600	prepare_cctx ((coro_stack *)arg);
817	if (SvROK (sv)) \
818	sv = SvRV (sv); \
819	\
820	if (SvTYPE (sv) == SVt_PVHV) \
821	{ \
822	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
823	\
824	if (!he) \
825	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
826	\
827	(sv) = SvRV (HeVAL(he)); \
828	} \
829	\
830	/* must also be changed inside Coro::Cont::yield */ \
831	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
832	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
833	\
834	} while(0)
835		601
836	#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);
837		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
838	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
839	api_transfer(pTHX_ SV *prev, SV *next, int flags)	846	api_transfer (SV *prev, SV *next, int flags)
840	{	847	{
841	SV_CORO (prev, "Coro::transfer");	848	dTHX;
842	SV_CORO (next, "Coro::transfer");	849	struct transfer_args ta;
843		850
844	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	851	prepare_transfer (&ta, prev, next, flags);
		852	TRANSFER (ta);
845	}	853	}
846		854
847	/** Coro ********************************************************************/	855	/** Coro ********************************************************************/
848		856
849	#define PRIO_MAX 3	857	#define PRIO_MAX 3
…		…
853	#define PRIO_IDLE -3	861	#define PRIO_IDLE -3
854	#define PRIO_MIN -4	862	#define PRIO_MIN -4
855		863
856	/* for Coro.pm */	864	/* for Coro.pm */
857	static GV *coro_current, *coro_idle;	865	static GV *coro_current, *coro_idle;
858	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
859	static int coro_nready;	867	static int coro_nready;
860		868
861	static void	869	static void
862	coro_enq (pTHX_ SV *sv)	870	coro_enq (SV *sv)
863	{	871	{
		872	int prio;
		873
864	if (SvTYPE (sv) == SVt_PVHV)	874	if (SvTYPE (sv) != SVt_PVHV)
865	{
866	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
867	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
868
869	prio = prio > PRIO_MAX ? PRIO_MAX
870	: prio < PRIO_MIN ? PRIO_MIN
871	: prio;
872
873	av_push (coro_ready [prio - PRIO_MIN], sv);
874	coro_nready++;
875
876	return;
877	}
878
879	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++;
880	}	881	}
881		882
882	static SV *	883	static SV *
883	coro_deq (pTHX_ int min_prio)	884	coro_deq (int min_prio)
884	{	885	{
885	int prio = PRIO_MAX - PRIO_MIN;	886	int prio = PRIO_MAX - PRIO_MIN;
886		887
887	min_prio -= PRIO_MIN;	888	min_prio -= PRIO_MIN;
888	if (min_prio < 0)	889	if (min_prio < 0)
889	min_prio = 0;	890	min_prio = 0;
890		891
891	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
892	if (av_len (coro_ready[prio]) >= 0)	893	if (AvFILLp (coro_ready [prio]) >= 0)
893	{	894	{
894	coro_nready--;	895	coro_nready--;
895	return av_shift (coro_ready[prio]);	896	return av_shift (coro_ready [prio]);
896	}	897	}
897		898
898	return 0;	899	return 0;
899	}	900	}
900		901
…		…
905		906
906	if (SvROK (coro))	907	if (SvROK (coro))
907	coro = SvRV (coro);	908	coro = SvRV (coro);
908		909
909	LOCK;	910	LOCK;
910	coro_enq (aTHX_ SvREFCNT_inc (coro));	911	coro_enq (SvREFCNT_inc (coro));
911	UNLOCK;	912	UNLOCK;
912	}	913	}
913		914
914	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
915	api_schedule (void)	971	api_schedule (void)
916	{	972	{
917	dTHX;	973	dTHX;
		974	struct transfer_args ta;
918		975
919	SV *prev, *next;	976	prepare_schedule (&ta);
920		977	TRANSFER (ta);
921	LOCK;
922
923	prev = SvRV (GvSV (coro_current));
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (!next)
927	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
928
929	/* free this only after the transfer */
930	coro_mortal = prev;
931	SV_CORO (prev, "Coro::schedule");
932
933	SvRV (GvSV (coro_current)) = next;
934
935	SV_CORO (next, "Coro::schedule");
936
937	UNLOCK;
938
939	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
940	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
941	}	978	}
942		979
943	static void	980	static void
944	api_cede (void)	981	api_cede (void)
945	{	982	{
946	dTHX;	983	dTHX;
		984	struct transfer_args ta;
947		985
948	LOCK;	986	prepare_cede (&ta);
949	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	987	TRANSFER (ta);
950	UNLOCK;
951
952	api_schedule ();
953	}	988	}
954		989
955	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
956		991
957	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
958		993
959	BOOT:	994	BOOT:
960	{ /* {} necessary for stoopid perl-5.6.x */	995	{
961	#ifdef USE_ITHREADS	996	#ifdef USE_ITHREADS
962	MUTEX_INIT (&coro_mutex);	997	MUTEX_INIT (&coro_mutex);
963	#endif	998	#endif
		999	BOOT_PAGESIZE;
964		1000
965	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
966	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
967	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
968		1002
969	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
970	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
971	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
972	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
973		1006
974	main_mainstack = PL_mainstack;	1007	main_mainstack = PL_mainstack;
975		1008
976	coroapi.ver = CORO_API_VERSION;	1009	coroapi.ver = CORO_API_VERSION;
977	coroapi.transfer = api_transfer;	1010	coroapi.transfer = api_transfer;
978	}
979		1011
980	Coro::State	1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
981	_newprocess(args)	1013	}
982	SV * args	1014
983	PROTOTYPE: $	1015	SV *
		1016	new (char *klass, ...)
984	CODE:	1017	CODE:
985	Coro__State coro;	1018	{
		1019	struct coro *coro;
		1020	HV *hv;
		1021	int i;
986		1022
987	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
988	croak ("Coro::State::_newprocess expects an arrayref");
989
990	Newz (0, coro, 1, struct coro);	1023	Newz (0, coro, 1, struct coro);
		1024	coro->args = newAV ();
991		1025
992	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
993	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
994	/*coro->stack = 0;*/	1034	/*coro->stack = 0;*/
995		1035	}
996	/* same as JMPENV_BOOTSTRAP */
997	/* we might be able to recycle start_env, but safe is safe */
998	/*Zero(&coro->start_env, 1, JMPENV);*/
999	coro->start_env.je_ret = -1;
1000	coro->start_env.je_mustcatch = TRUE;
1001
1002	RETVAL = coro;
1003	OUTPUT:	1036	OUTPUT:
1004	RETVAL	1037	RETVAL
1005		1038
1006	void	1039	void
1007	transfer(prev, next, flags)	1040	_set_stacklevel (...)
1008	SV *prev	1041	ALIAS:
1009	SV *next	1042	Coro::State::transfer = 1
1010	int flags	1043	Coro::schedule = 2
1011	PROTOTYPE: @	1044	Coro::cede = 3
		1045	Coro::Cont::yield = 4
1012	CODE:	1046	CODE:
1013	PUTBACK;	1047	{
1014	SV_CORO (next, "Coro::transfer");	1048	struct transfer_args ta;
1015	SV_CORO (prev, "Coro::transfer");	1049
1016	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1050	switch (ix)
1017	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	}
1018		1103
1019	void	1104	void
1020	DESTROY(coro)	1105	_clone_state_from (SV *dst, SV *src)
1021	Coro::State coro	1106	CODE:
1022	CODE:	1107	{
		1108	struct coro *coro_src = SvSTATE (src);
1023		1109
1024	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1025	{
1026	struct coro temp;
1027		1111
1028	PUTBACK;	1112	++coro_src->refcnt;
1029	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;
1030	LOAD (aTHX_ coro);	1114	}
1031	SPAGAIN;
1032
1033	destroy_stacks (aTHX);
1034
1035	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1036	SPAGAIN;
1037
1038	coro->mainstack = 0;
1039	}
1040
1041	deallocate_stack (coro);
1042	SvREFCNT_dec (coro->args);
1043	Safefree (coro);
1044		1115
1045	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
1046	_exit(code)	1123	_exit (code)
1047	int code	1124	int code
1048	PROTOTYPE: $	1125	PROTOTYPE: $
1049	CODE:	1126	CODE:
1050	_exit (code);	1127	_exit (code);
1051		1128
1052	MODULE = Coro::State PACKAGE = Coro::Cont
1053
1054	# this is slightly dirty (should expose a c-level api)
1055
1056	void
1057	yield(...)
1058	PROTOTYPE: @
1059	CODE:
1060	SV *yieldstack;
1061	SV *sv;
1062	AV *defav = GvAV (PL_defgv);
1063	struct coro *prev, *next;
1064
1065	yieldstack = *hv_fetch (
1066	(HV *)SvRV (GvSV (coro_current)),
1067	"yieldstack", sizeof ("yieldstack") - 1,
1068	0
1069	);
1070
1071	/* set up @_ -- ugly */
1072	av_clear (defav);
1073	av_fill (defav, items - 1);
1074	while (items--)
1075	av_store (defav, items, SvREFCNT_inc (ST(items)));
1076
1077	sv = av_pop ((AV *)SvRV (yieldstack));
1078	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1079	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1080	SvREFCNT_dec (sv);
1081
1082	transfer (aTHX_ prev, next, 0);
1083
1084	MODULE = Coro::State PACKAGE = Coro	1129	MODULE = Coro::State PACKAGE = Coro
1085		1130
1086	# this is slightly dirty (should expose a c-level api)
1087
1088	BOOT:	1131	BOOT:
1089	{	1132	{
1090	int i;	1133	int i;
		1134
1091	HV *stash = gv_stashpv ("Coro", TRUE);	1135	coro_stash = gv_stashpv ("Coro", TRUE);
1092		1136
1093	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1094	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1095	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1096	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1097	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1098	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1099		1143
1100	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1101	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1102		1146
1103	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1111	coroapi.ready = api_ready;	1155	coroapi.ready = api_ready;
1112	coroapi.nready = &coro_nready;	1156	coroapi.nready = &coro_nready;
1113	coroapi.current = coro_current;	1157	coroapi.current = coro_current;
1114		1158
1115	GCoroAPI = &coroapi;	1159	GCoroAPI = &coroapi;
1116	sv_setiv(sv, (IV)&coroapi);	1160	sv_setiv (sv, (IV)&coroapi);
1117	SvREADONLY_on(sv);	1161	SvREADONLY_on (sv);
1118	}	1162	}
1119	}	1163	}
1120		1164
1121	#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	}
1122		1184
1123	void	1185	void
1124	ready(self)	1186	ready (SV *self)
1125	SV * self
1126	PROTOTYPE: $	1187	PROTOTYPE: $
1127	CODE:	1188	CODE:
1128	api_ready (self);	1189	api_ready (self);
1129		1190
1130	#endif
1131
1132	int	1191	int
1133	nready(...)	1192	nready (...)
1134	PROTOTYPE:	1193	PROTOTYPE:
1135	CODE:	1194	CODE:
1136	RETVAL = coro_nready;	1195	RETVAL = coro_nready;
1137	OUTPUT:	1196	OUTPUT:
1138	RETVAL	1197	RETVAL
1139		1198
1140	void	1199	MODULE = Coro::State PACKAGE = Coro::AIO
1141	schedule(...)
1142	PROTOTYPE:
1143	CODE:
1144	api_schedule ();
1145		1200
1146	void
1147	cede(...)
1148	PROTOTYPE:
1149	CODE:
1150	api_cede ();
1151
1152	# and these are hacks
1153	SV *	1201	SV *
1154	_aio_get_state ()	1202	_get_state ()
1155	CODE:	1203	CODE:
1156	{	1204	{
1157	struct {	1205	struct {
1158	int errorno;	1206	int errorno;
1159	int laststype;	1207	int laststype;
…		…
1170	}	1218	}
1171	OUTPUT:	1219	OUTPUT:
1172	RETVAL	1220	RETVAL
1173		1221
1174	void	1222	void
1175	_aio_set_state (char *data_)	1223	_set_state (char *data_)
1176	PROTOTYPE: $	1224	PROTOTYPE: $
1177	CODE:	1225	CODE:
1178	{	1226	{
1179	struct {	1227	struct {
1180	int errorno;	1228	int errorno;

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