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Comparing Coro/Coro/State.xs (file contents):
Revision 1.69 by root, Fri Dec 16 01:33:20 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
32	#include <signal.h>	30	#include <stdio.h>
		31	#include <errno.h>
		32
		33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		34	# undef STACKGUARD
		35	#endif
		36
		37	#ifndef STACKGUARD
		38	# define STACKGUARD 0
		39	#endif
33		40
34	#ifdef HAVE_MMAP	41	#ifdef HAVE_MMAP
35	# include <unistd.h>	42	# include <unistd.h>
36	# include <sys/mman.h>	43	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	44	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	46	# define MAP_ANONYMOUS MAP_ANON
40	# else	47	# else
41	# undef HAVE_MMAP	48	# undef HAVE_MMAP
42	# endif	49	# endif
43	# endif	50	# endif
		51	# include <limits.h>
		52	# ifndef PAGESIZE
		53	# define PAGESIZE pagesize
		54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		55	static long pagesize;
		56	# else
		57	# define BOOT_PAGESIZE
44	#endif	58	# endif
45		59	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		60
49	/* The next macro should declare a variable stacklevel that contains and approximation	61	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	62	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	63	* and should be unique. */
		64	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	65	#define STACKLEVEL ((void *)&stacklevel)
53		66
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	67	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		68
56	#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58	#include "CoroAPI.h"	69	#include "CoroAPI.h"
		70
		71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		72
60	#ifdef USE_ITHREADS	73	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	74	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
66	# define UNLOCK (void)0	79	# define UNLOCK (void)0
67	#endif	80	#endif
68		81
69	static struct CoroAPI coroapi;	82	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	83	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	84	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	85	static SV *coro_mortal; /* will be freed after next transfer */
75		86
76	/* this is actually not only the c stack but also c registers etc... */	87	/* this is a structure representing a c-level coroutine */
77	typedef struct {	88	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	89	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		90
82	coro_context cctx;	91	/* the stack */
83
84	void *sptr;	92	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	93	long ssize; /* positive == mmap, otherwise malloc */
		94
		95	/* cpu state */
		96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		97	JMPENV *top_env;
		98	coro_context cctx;
86	} coro_stack;	99	} coro_stack;
87		100
		101	/* this is a structure representing a perl-level coroutine */
88	struct coro {	102	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	103	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	104	coro_stack *stack;
94	void *cursp;	105
		106	/* data associated with this coroutine (initial args) */
		107	AV *args;
95	int gencnt;	108	int refcnt;
96		109
97	/* optionally saved, might be zero */	110	/* optionally saved, might be zero */
98	AV *defav;	111	AV *defav;
99	SV *defsv;	112	SV *defsv;
100	SV *errsv;	113	SV *errsv;
…		…
130	OP **retstack;	143	OP **retstack;
131	I32 retstack_ix;	144	I32 retstack_ix;
132	I32 retstack_max;	145	I32 retstack_max;
133	PMOP *curpm;	146	PMOP *curpm;
134	COP *curcop;	147	COP *curcop;
135	JMPENV *top_env;
136		148
137	/* data associated with this coroutine (initial args) */	149	/* coro process data */
138	AV *args;	150	int prio;
139	};	151	};
140		152
141	typedef struct coro *Coro__State;	153	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	154	typedef struct coro *Coro__State_or_hashref;
143		155
144	/* mostly copied from op.c:cv_clone2 */	156	static AV *
145	STATIC AV *	157	coro_clone_padlist (CV *cv)
146	clone_padlist (pTHX_ AV *protopadlist)
147	{	158	{
148	AV *av;	159	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;	160	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		161
167	newpadlist = newAV ();	162	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	163	AvREAL_off (newpadlist);
169	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)));
170	av_store (newpadlist, 1, (SV *) newpad);	173	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		174
241	return newpadlist;	175	return newpadlist;
242	}	176	}
243		177
244	STATIC void	178	static void
245	free_padlist (pTHX_ AV *padlist)	179	free_padlist (AV *padlist)
246	{	180	{
247	/* may be during global destruction */	181	/* may be during global destruction */
248	if (SvREFCNT (padlist))	182	if (SvREFCNT (padlist))
249	{	183	{
250	I32 i = AvFILLp (padlist);	184	I32 i = AvFILLp (padlist);
…		…
263		197
264	SvREFCNT_dec ((SV*)padlist);	198	SvREFCNT_dec ((SV*)padlist);
265	}	199	}
266	}	200	}
267		201
268	STATIC int	202	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	203	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	204	{
271	AV *padlist;	205	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	206	AV *av = (AV *)mg->mg_obj;
273		207
274	/* casting is fun. */	208	/* casting is fun. */
275	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276	free_padlist (aTHX_ padlist);	210	free_padlist (padlist);
277		211
278	SvREFCNT_dec (av);	212	SvREFCNT_dec (av);
		213
		214	return 0;
279	}	215	}
280		216
281	#define PERL_MAGIC_coro PERL_MAGIC_ext	217	#define PERL_MAGIC_coro PERL_MAGIC_ext
282		218
283	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
284		220
285	/* the next two functions merely cache the padlists */	221	/* the next two functions merely cache the padlists */
286	STATIC void	222	static void
287	get_padlist (pTHX_ CV *cv)	223	get_padlist (CV *cv)
288	{	224	{
289	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
290		226
291	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
292	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
293	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
294	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	238	CvPADLIST (cv) = coro_clone_padlist (cv);
		239	#endif
		240	}
295	}	241	}
296		242
297	STATIC void	243	static void
298	put_padlist (pTHX_ CV *cv)	244	put_padlist (CV *cv)
299	{	245	{
300	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301		247
302	if (!mg)	248	if (!mg)
303	{	249	{
…		…
311	}	257	}
312		258
313	#define SB do {	259	#define SB do {
314	#define SE } while (0)	260	#define SE } while (0)
315		261
316	#define LOAD(state) load_state(aTHX_ (state));	262	#define LOAD(state) load_state((state));
317	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	263	#define SAVE(state,flags) save_state((state),(flags));
318		264
319	#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
320		266
321	static void	267	static void
322	load_state(pTHX_ Coro__State c)	268	load_state(Coro__State c)
323	{	269	{
324	PL_dowarn = c->dowarn;	270	PL_dowarn = c->dowarn;
325	PL_in_eval = c->in_eval;	271	PL_in_eval = c->in_eval;
326		272
327	PL_curstackinfo = c->curstackinfo;	273	PL_curstackinfo = c->curstackinfo;
…		…
345	PL_scopestack_ix = c->scopestack_ix;	291	PL_scopestack_ix = c->scopestack_ix;
346	PL_scopestack_max = c->scopestack_max;	292	PL_scopestack_max = c->scopestack_max;
347	PL_savestack = c->savestack;	293	PL_savestack = c->savestack;
348	PL_savestack_ix = c->savestack_ix;	294	PL_savestack_ix = c->savestack_ix;
349	PL_savestack_max = c->savestack_max;	295	PL_savestack_max = c->savestack_max;
		296	#if PERL_VERSION < 9
350	PL_retstack = c->retstack;	297	PL_retstack = c->retstack;
351	PL_retstack_ix = c->retstack_ix;	298	PL_retstack_ix = c->retstack_ix;
352	PL_retstack_max = c->retstack_max;	299	PL_retstack_max = c->retstack_max;
		300	#endif
353	PL_curpm = c->curpm;	301	PL_curpm = c->curpm;
354	PL_curcop = c->curcop;	302	PL_curcop = c->curcop;
355	PL_top_env = c->top_env;
356		303
357	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
358	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
359	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
360		307
…		…
367	{	314	{
368	AV *padlist = (AV *)POPs;	315	AV *padlist = (AV *)POPs;
369		316
370	if (padlist)	317	if (padlist)
371	{	318	{
372	put_padlist (aTHX_ cv); /* mark this padlist as available */	319	put_padlist (cv); /* mark this padlist as available */
373	CvPADLIST(cv) = padlist;	320	CvPADLIST(cv) = padlist;
374	}	321	}
375		322
376	++CvDEPTH(cv);	323	++CvDEPTH(cv);
377	}	324	}
…		…
379	PUTBACK;	326	PUTBACK;
380	}	327	}
381	}	328	}
382		329
383	static void	330	static void
384	save_state(pTHX_ Coro__State c, int flags)	331	save_state(Coro__State c, int flags)
385	{	332	{
386	{	333	{
387	dSP;	334	dSP;
388	I32 cxix = cxstack_ix;	335	I32 cxix = cxstack_ix;
389	PERL_CONTEXT *ccstk = cxstack;	336	PERL_CONTEXT *ccstk = cxstack;
…		…
417	}	364	}
418		365
419	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST(cv));
420	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
421		368
422	get_padlist (aTHX_ cv); /* this is a monster */	369	get_padlist (cv);
423	}	370	}
424	}	371	}
425	#ifdef CXt_FORMAT	372	#ifdef CXt_FORMAT
426	else if (CxTYPE(cx) == CXt_FORMAT)	373	else if (CxTYPE(cx) == CXt_FORMAT)
427	{	374	{
…		…
471	c->scopestack_ix = PL_scopestack_ix;	418	c->scopestack_ix = PL_scopestack_ix;
472	c->scopestack_max = PL_scopestack_max;	419	c->scopestack_max = PL_scopestack_max;
473	c->savestack = PL_savestack;	420	c->savestack = PL_savestack;
474	c->savestack_ix = PL_savestack_ix;	421	c->savestack_ix = PL_savestack_ix;
475	c->savestack_max = PL_savestack_max;	422	c->savestack_max = PL_savestack_max;
		423	#if PERL_VERSION < 9
476	c->retstack = PL_retstack;	424	c->retstack = PL_retstack;
477	c->retstack_ix = PL_retstack_ix;	425	c->retstack_ix = PL_retstack_ix;
478	c->retstack_max = PL_retstack_max;	426	c->retstack_max = PL_retstack_max;
		427	#endif
479	c->curpm = PL_curpm;	428	c->curpm = PL_curpm;
480	c->curcop = PL_curcop;	429	c->curcop = PL_curcop;
481	c->top_env = PL_top_env;
482	}	430	}
483		431
484	/*	432	/*
485	* allocate various perl stacks. This is an exact copy	433	* allocate various perl stacks. This is an exact copy
486	* of perl.c:init_stacks, except that it uses less memory	434	* of perl.c:init_stacks, except that it uses less memory
487	* on the (sometimes correct) assumption that coroutines do	435	* on the (sometimes correct) assumption that coroutines do
488	* not usually need a lot of stackspace.	436	* not usually need a lot of stackspace.
489	*/	437	*/
490	STATIC void	438	static void
491	coro_init_stacks (pTHX)	439	coro_init_stacks ()
492	{	440	{
493	LOCK;
494
495	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
496	PL_curstackinfo->si_type = PERLSI_MAIN;	442	PL_curstackinfo->si_type = PERLSI_MAIN;
497	PL_curstack = PL_curstackinfo->si_stack;	443	PL_curstack = PL_curstackinfo->si_stack;
498	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499		445
…		…
520		466
521	New(54,PL_savestack,96,ANY);	467	New(54,PL_savestack,96,ANY);
522	PL_savestack_ix = 0;	468	PL_savestack_ix = 0;
523	PL_savestack_max = 96;	469	PL_savestack_max = 96;
524		470
		471	#if PERL_VERSION < 9
525	New(54,PL_retstack,8,OP*);	472	New(54,PL_retstack,8,OP*);
526	PL_retstack_ix = 0;	473	PL_retstack_ix = 0;
527	PL_retstack_max = 8;	474	PL_retstack_max = 8;
528		475	#endif
529	UNLOCK;
530	}	476	}
531		477
532	/*	478	/*
533	* destroy the stacks, the callchain etc...	479	* destroy the stacks, the callchain etc...
534	*/	480	*/
535	STATIC void	481	static void
536	destroy_stacks(pTHX)	482	destroy_stacks()
537	{	483	{
538	if (!IN_DESTRUCT)	484	if (!IN_DESTRUCT)
539	{	485	{
540	/* is this ugly, I ask? */	486	/* is this ugly, I ask? */
541	LEAVE_SCOPE (0);	487	LEAVE_SCOPE (0);
…		…
572		518
573	Safefree (PL_tmps_stack);	519	Safefree (PL_tmps_stack);
574	Safefree (PL_markstack);	520	Safefree (PL_markstack);
575	Safefree (PL_scopestack);	521	Safefree (PL_scopestack);
576	Safefree (PL_savestack);	522	Safefree (PL_savestack);
		523	#if PERL_VERSION < 9
577	Safefree (PL_retstack);	524	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 = STACKSIZE * 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	525	#endif
598	{
599	/*FIXME*//*D*//* reasonable stack size! */
600	stack->ssize = - (STACKSIZE * sizeof (long));
601	New (0, stack->sptr, STACKSIZE, long);
602	}
603	}
604	else
605	stack->sptr = 0;
606
607	ctx->stack = stack;
608	}	526	}
609		527
610	static void	528	static void
611	deallocate_stack (Coro__State ctx)	529	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	{	530	{
638	/*	531	/*
639	* emulate part of the perl startup here.	532	* emulate part of the perl startup here.
640	*/	533	*/
641	dTHX;	534	dTHX;
642	dSP;	535	dSP;
643	Coro__State ctx = (Coro__State)arg;	536	UNOP myop;
644	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
645		538
646	coro_init_stacks (aTHX);	539	coro_init_stacks ();
647	/*PL_curcop = 0;*/	540	/*PL_curcop = 0;*/
648	/*PL_in_eval = PL_in_eval;*/ /* inherit */	541	/*PL_in_eval = PL_in_eval;*/ /* inherit */
649	SvREFCNT_dec (GvAV (PL_defgv));	542	SvREFCNT_dec (GvAV (PL_defgv));
650	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	543	GvAV (PL_defgv) = coro->args; coro->args = 0;
651		544
652	SPAGAIN;	545	SPAGAIN;
653		546
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);	547	Zero (&myop, 1, UNOP);
674	myop.op_next = Nullop;	548	myop.op_next = Nullop;
675	myop.op_flags = OPf_WANT_VOID;	549	myop.op_flags = OPf_WANT_VOID;
676		550
		551	PL_op = (OP *)&myop;
		552
677	PUSHMARK(SP);	553	PUSHMARK(SP);
678	XPUSHs (sub_init);	554	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;	555	PUTBACK;
687	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688	SPAGAIN;	557	SPAGAIN;
689		558
690	ENTER; /* necessary e.g. for dounwind */	559	ENTER; /* necessary e.g. for dounwind */
691	}
692	}	560	}
693		561
694	static void	562	static void
695	continue_coro (void *arg)	563	free_coro_mortal ()
696	{	564	{
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)	565	if (coro_mortal)
807	{	566	{
808	SvREFCNT_dec (coro_mortal);	567	SvREFCNT_dec (coro_mortal);
809	coro_mortal = 0;	568	coro_mortal = 0;
810	}	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	*/
811	UNLOCK;	597	UNLOCK;
812	}
813		598
814	#define SV_CORO(sv,func) \	599	PL_top_env = &PL_start_env;
815	do { \	600	prepare_cctx ((coro_stack *)arg);
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		601
835	#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);
836		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
837	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
838	api_transfer(pTHX_ SV *prev, SV *next, int flags)	846	api_transfer (SV *prev, SV *next, int flags)
839	{	847	{
840	SV_CORO (prev, "Coro::transfer");	848	dTHX;
841	SV_CORO (next, "Coro::transfer");	849	struct transfer_args ta;
842		850
843	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	851	prepare_transfer (&ta, prev, next, flags);
		852	TRANSFER (ta);
844	}	853	}
845		854
846	/** Coro ********************************************************************/	855	/** Coro ********************************************************************/
847		856
848	#define PRIO_MAX 3	857	#define PRIO_MAX 3
…		…
852	#define PRIO_IDLE -3	861	#define PRIO_IDLE -3
853	#define PRIO_MIN -4	862	#define PRIO_MIN -4
854		863
855	/* for Coro.pm */	864	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;	865	static GV *coro_current, *coro_idle;
857	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;	867	static int coro_nready;
859		868
860	static void	869	static void
861	coro_enq (pTHX_ SV *sv)	870	coro_enq (SV *sv)
862	{	871	{
		872	int prio;
		873
863	if (SvTYPE (sv) == SVt_PVHV)	874	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");	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++;
879	}	881	}
880		882
881	static SV *	883	static SV *
882	coro_deq (pTHX_ int min_prio)	884	coro_deq (int min_prio)
883	{	885	{
884	int prio = PRIO_MAX - PRIO_MIN;	886	int prio = PRIO_MAX - PRIO_MIN;
885		887
886	min_prio -= PRIO_MIN;	888	min_prio -= PRIO_MIN;
887	if (min_prio < 0)	889	if (min_prio < 0)
888	min_prio = 0;	890	min_prio = 0;
889		891
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (av_len (coro_ready[prio]) >= 0)	893	if (AvFILLp (coro_ready [prio]) >= 0)
892	{	894	{
893	coro_nready--;	895	coro_nready--;
894	return av_shift (coro_ready[prio]);	896	return av_shift (coro_ready [prio]);
895	}	897	}
896		898
897	return 0;	899	return 0;
898	}	900	}
899		901
…		…
904		906
905	if (SvROK (coro))	907	if (SvROK (coro))
906	coro = SvRV (coro);	908	coro = SvRV (coro);
907		909
908	LOCK;	910	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	911	coro_enq (SvREFCNT_inc (coro));
910	UNLOCK;	912	UNLOCK;
911	}	913	}
912		914
913	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
914	api_schedule (void)	971	api_schedule (void)
915	{	972	{
916	dTHX;	973	dTHX;
		974	struct transfer_args ta;
917		975
918	SV *prev, *next;	976	prepare_schedule (&ta);
919		977	TRANSFER (ta);
920	LOCK;
921
922	prev = SvRV (GvSV (coro_current));
923	next = coro_deq (aTHX_ PRIO_MIN);
924
925	if (!next)
926	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
927
928	/* free this only after the transfer */
929	coro_mortal = prev;
930	SV_CORO (prev, "Coro::schedule");
931
932	SvRV (GvSV (coro_current)) = next;
933
934	SV_CORO (next, "Coro::schedule");
935
936	UNLOCK;
937
938	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
939	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
940	}	978	}
941		979
942	static void	980	static void
943	api_cede (void)	981	api_cede (void)
944	{	982	{
945	dTHX;	983	dTHX;
		984	struct transfer_args ta;
946		985
947	LOCK;	986	prepare_cede (&ta);
948	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	987	TRANSFER (ta);
949	UNLOCK;
950
951	api_schedule ();
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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