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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.66 by root, Mon Dec 12 19:43:41 2005 UTC vs.
Revision 1.123 by root, Mon Dec 4 21:56:00 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"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	|| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
14	# endif	25	# endif
15	# ifndef call_sv	26	# ifndef call_sv
16	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
29	# endif	40	# endif
30	#endif	41	#endif
31		42
32	#include <signal.h>	43	#include <stdio.h>
		44	#include <errno.h>
		45
		46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		47	# undef STACKGUARD
		48	#endif
		49
		50	#ifndef STACKGUARD
		51	# define STACKGUARD 0
		52	#endif
33		53
34	#ifdef HAVE_MMAP	54	#ifdef HAVE_MMAP
35	# include <unistd.h>	55	# include <unistd.h>
36	# include <sys/mman.h>	56	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	57	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	59	# define MAP_ANONYMOUS MAP_ANON
40	# else	60	# else
41	# undef HAVE_MMAP	61	# undef HAVE_MMAP
42	# endif	62	# endif
43	# endif	63	# endif
		64	# include <limits.h>
		65	# ifndef PAGESIZE
		66	# define PAGESIZE pagesize
		67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		68	static long pagesize;
		69	# else
		70	# define BOOT_PAGESIZE (void)0
44	#endif	71	# endif
45		72	#else
46	#define SUB_INIT "Coro::State::initialize"	73	# define PAGESIZE 0
47	#define UCORO_STATE "_coro_state"	74	# define BOOT_PAGESIZE (void)0
		75	#endif
48		76
49	/* The next macro should declare a variable stacklevel that contains and approximation	77	/* 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	78	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
53		82
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		84
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	85	#if __GNUC__ >= 3
		86	# define attribute(x) __attribute__(x)
		87	#else
		88	# define attribute(x)
		89	#endif
		90
		91	#define NOINLINE attribute ((noinline))
57		92
58	#include "CoroAPI.h"	93	#include "CoroAPI.h"
59		94
60	#ifdef USE_ITHREADS	95	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	96	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	97	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	98	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	99	#else
65	# define LOCK 0	100	# define LOCK (void)0
66	# define UNLOCK 0	101	# define UNLOCK (void)0
67	#endif	102	#endif
		103
		104	struct io_state
		105	{
		106	int errorno;
		107	I32 laststype;
		108	int laststatval;
		109	Stat_t statcache;
		110	};
68		111
69	static struct CoroAPI coroapi;	112	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	113	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	114	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 */	115	static SV *coro_mortal; /* will be freed after next transfer */
75		116
76	/* this is actually not only the c stack but also c registers etc... */	117	static struct coro_cctx *cctx_first;
		118	static int cctx_count, cctx_idle;
		119
		120	/* this is a structure representing a c-level coroutine */
77	typedef struct {	121	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	122	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		123
82	coro_context cctx;	124	/* the stack */
83
84	void *sptr;	125	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	126	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		127
		128	/* cpu state */
		129	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		130	JMPENV *top_env;
		131	coro_context cctx;
		132
		133	int inuse;
		134
		135	#if USE_VALGRIND
		136	int valgrind_id;
		137	#endif
		138	} coro_cctx;
		139
		140	enum {
		141	CF_RUNNING = 0x0001, /* coroutine is running */
		142	CF_READY = 0x0002, /* coroutine is ready */
		143	CF_NEW = 0x0004, /* ahs never been switched to */
		144	};
		145
		146	/* this is a structure representing a perl-level coroutine */
88	struct coro {	147	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	148	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	149	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136		150
137	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
138	AV *args;	152	AV *args;
		153	int refcnt;
		154	int save; /* CORO_SAVE flags */
		155	int flags; /* CF_ flags */
		156
		157	/* optionally saved, might be zero */
		158	AV *defav; /* @_ */
		159	SV *defsv; /* $_ */
		160	SV *errsv; /* $@ */
		161	SV *irssv; /* $/ */
		162	SV *irssv_sv; /* real $/ cache */
		163
		164	#define VAR(name,type) type name;
		165	# include "state.h"
		166	#undef VAR
		167
		168	/* coro process data */
		169	int prio;
139	};	170	};
140		171
141	typedef struct coro *Coro__State;	172	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	173	typedef struct coro *Coro__State_or_hashref;
143		174
144	/* mostly copied from op.c:cv_clone2 */	175	static AV *
145	STATIC AV *	176	coro_clone_padlist (CV *cv)
146	clone_padlist (pTHX_ AV *protopadlist)
147	{	177	{
148	AV *av;	178	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;	179	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		180
167	newpadlist = newAV ();	181	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	182	AvREAL_off (newpadlist);
169	av_store (newpadlist, 0, (SV *) newpad_name);	183	#if PERL_VERSION_ATLEAST (5,9,0)
		184	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		185	#else
		186	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		187	#endif
		188	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		189	--AvFILLp (padlist);
		190
		191	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
170	av_store (newpadlist, 1, (SV *) newpad);	192	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		193
241	return newpadlist;	194	return newpadlist;
242	}	195	}
243		196
244	STATIC void	197	static void
245	free_padlist (pTHX_ AV *padlist)	198	free_padlist (AV *padlist)
246	{	199	{
247	/* may be during global destruction */	200	/* may be during global destruction */
248	if (SvREFCNT (padlist))	201	if (SvREFCNT (padlist))
249	{	202	{
250	I32 i = AvFILLp (padlist);	203	I32 i = AvFILLp (padlist);
…		…
263		216
264	SvREFCNT_dec ((SV*)padlist);	217	SvREFCNT_dec ((SV*)padlist);
265	}	218	}
266	}	219	}
267		220
268	STATIC int	221	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	222	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	223	{
271	AV *padlist;	224	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	225	AV *av = (AV *)mg->mg_obj;
273		226
274	/* casting is fun. */	227	/* casting is fun. */
275	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	228	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276	free_padlist (aTHX_ padlist);	229	free_padlist (padlist);
277		230
278	SvREFCNT_dec (av);	231	SvREFCNT_dec (av);
		232
		233	return 0;
279	}	234	}
280		235
281	#define PERL_MAGIC_coro PERL_MAGIC_ext	236	#define PERL_MAGIC_coro PERL_MAGIC_ext
282		237
283	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	238	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
284		239
		240	#define CORO_MAGIC(cv) \
		241	SvMAGIC (cv) \
		242	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		243	? SvMAGIC (cv) \
		244	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		245	: 0
		246
285	/* the next two functions merely cache the padlists */	247	/* the next two functions merely cache the padlists */
286	STATIC void	248	static void
287	get_padlist (pTHX_ CV *cv)	249	get_padlist (CV *cv)
288	{	250	{
289	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	251	MAGIC *mg = CORO_MAGIC (cv);
		252	AV *av;
290		253
291	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	254	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
292	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	255	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
293	else	256	else
		257	{
		258	#if 0
		259	/* this is probably cleaner, but also slower? */
		260	CV *cp = Perl_cv_clone (cv);
		261	CvPADLIST (cv) = CvPADLIST (cp);
		262	CvPADLIST (cp) = 0;
		263	SvREFCNT_dec (cp);
		264	#else
294	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	265	CvPADLIST (cv) = coro_clone_padlist (cv);
		266	#endif
		267	}
295	}	268	}
296		269
297	STATIC void	270	static void
298	put_padlist (pTHX_ CV *cv)	271	put_padlist (CV *cv)
299	{	272	{
300	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	273	MAGIC *mg = CORO_MAGIC (cv);
		274	AV *av;
301		275
302	if (!mg)	276	if (!mg)
303	{	277	{
304	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
305	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
306	mg->mg_virtual = &vtbl_coro;	280	mg->mg_virtual = &vtbl_coro;
307	mg->mg_obj = (SV *)newAV ();	281	mg->mg_obj = (SV *)newAV ();
308	}	282	}
309		283
310	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	284	av = (AV *)mg->mg_obj;
		285
		286	if (AvFILLp (av) >= AvMAX (av))
		287	av_extend (av, AvMAX (av) + 1);
		288
		289	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
311	}	290	}
312		291
313	#define SB do {	292	#define SB do {
314	#define SE } while (0)	293	#define SE } while (0)
315		294
316	#define LOAD(state) load_state(aTHX_ (state));
317	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
318
319	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	295	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
320		296
321	static void	297	static void
322	load_state(pTHX_ Coro__State c)	298	load_perl (Coro__State c)
323	{	299	{
324	PL_dowarn = c->dowarn;	300	#define VAR(name,type) PL_ ## name = c->name;
325	PL_in_eval = c->in_eval;	301	# include "state.h"
326		302	#undef VAR
327	PL_curstackinfo = c->curstackinfo;
328	PL_curstack = c->curstack;
329	PL_mainstack = c->mainstack;
330	PL_stack_sp = c->stack_sp;
331	PL_op = c->op;
332	PL_curpad = c->curpad;
333	PL_comppad = c->comppad;
334	PL_compcv = c->compcv;
335	PL_stack_base = c->stack_base;
336	PL_stack_max = c->stack_max;
337	PL_tmps_stack = c->tmps_stack;
338	PL_tmps_floor = c->tmps_floor;
339	PL_tmps_ix = c->tmps_ix;
340	PL_tmps_max = c->tmps_max;
341	PL_markstack = c->markstack;
342	PL_markstack_ptr = c->markstack_ptr;
343	PL_markstack_max = c->markstack_max;
344	PL_scopestack = c->scopestack;
345	PL_scopestack_ix = c->scopestack_ix;
346	PL_scopestack_max = c->scopestack_max;
347	PL_savestack = c->savestack;
348	PL_savestack_ix = c->savestack_ix;
349	PL_savestack_max = c->savestack_max;
350	PL_retstack = c->retstack;
351	PL_retstack_ix = c->retstack_ix;
352	PL_retstack_max = c->retstack_max;
353	PL_curpm = c->curpm;
354	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);
		307	if (c->irssv)
		308	{
		309	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		310	SvREFCNT_dec (c->irssv);
		311	else
		312	{
		313	REPLACE_SV (PL_rs, c->irssv);
		314	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		315	sv_setsv (c->irssv_sv, PL_rs);
		316	}
		317	}
360		318
361	{	319	{
362	dSP;	320	dSP;
363	CV *cv;	321	CV *cv;
364		322
365	/* now do the ugly restore mess */	323	/* now do the ugly restore mess */
366	while ((cv = (CV *)POPs))	324	while ((cv = (CV *)POPs))
367	{	325	{
368	AV *padlist = (AV *)POPs;
369
370	if (padlist)
371	{
372	put_padlist (aTHX_ cv); /* mark this padlist as available */	326	put_padlist (cv); /* mark this padlist as available */
373	CvPADLIST(cv) = padlist;	327	CvDEPTH (cv) = PTR2IV (POPs);
374	}	328	CvPADLIST (cv) = (AV *)POPs;
375
376	++CvDEPTH(cv);
377	}	329	}
378		330
379	PUTBACK;	331	PUTBACK;
380	}	332	}
381	}	333	}
382		334
383	static void	335	static void
384	save_state(pTHX_ Coro__State c, int flags)	336	save_perl (Coro__State c)
385	{	337	{
386	{	338	{
387	dSP;	339	dSP;
388	I32 cxix = cxstack_ix;	340	I32 cxix = cxstack_ix;
389	PERL_CONTEXT *ccstk = cxstack;	341	PERL_CONTEXT *ccstk = cxstack;
…		…
400	{	352	{
401	while (cxix >= 0)	353	while (cxix >= 0)
402	{	354	{
403	PERL_CONTEXT *cx = &ccstk[cxix--];	355	PERL_CONTEXT *cx = &ccstk[cxix--];
404		356
405	if (CxTYPE(cx) == CXt_SUB)	357	if (CxTYPE (cx) == CXt_SUB)
406	{	358	{
407	CV *cv = cx->blk_sub.cv;	359	CV *cv = cx->blk_sub.cv;
		360
408	if (CvDEPTH(cv))	361	if (CvDEPTH (cv))
409	{	362	{
410	EXTEND (SP, CvDEPTH(cv)*2);	363	EXTEND (SP, 3);
411		364
412	while (--CvDEPTH(cv))
413	{
414	/* this tells the restore code to increment CvDEPTH */
415	PUSHs (Nullsv);
416	PUSHs ((SV *)cv);
417	}
418
419	PUSHs ((SV *)CvPADLIST(cv));	365	PUSHs ((SV *)CvPADLIST (cv));
		366	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
420	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
421		368
422	get_padlist (aTHX_ cv); /* this is a monster */	369	CvDEPTH (cv) = 0;
		370	get_padlist (cv);
423	}	371	}
424	}	372	}
425	#ifdef CXt_FORMAT	373	#ifdef CXt_FORMAT
426	else if (CxTYPE(cx) == CXt_FORMAT)	374	else if (CxTYPE (cx) == CXt_FORMAT)
427	{	375	{
428	/* I never used formats, so how should I know how these are implemented? */	376	/* I never used formats, so how should I know how these are implemented? */
429	/* my bold guess is as a simple, plain sub... */	377	/* my bold guess is as a simple, plain sub... */
430	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	378	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
431	}	379	}
…		…
441	}	389	}
442		390
443	PUTBACK;	391	PUTBACK;
444	}	392	}
445		393
446	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	394	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
447	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	395	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
448	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	396	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		397	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
449		398
450	c->dowarn = PL_dowarn;	399	#define VAR(name,type)c->name = PL_ ## name;
451	c->in_eval = PL_in_eval;	400	# include "state.h"
452		401	#undef VAR
453	c->curstackinfo = PL_curstackinfo;
454	c->curstack = PL_curstack;
455	c->mainstack = PL_mainstack;
456	c->stack_sp = PL_stack_sp;
457	c->op = PL_op;
458	c->curpad = PL_curpad;
459	c->comppad = PL_comppad;
460	c->compcv = PL_compcv;
461	c->stack_base = PL_stack_base;
462	c->stack_max = PL_stack_max;
463	c->tmps_stack = PL_tmps_stack;
464	c->tmps_floor = PL_tmps_floor;
465	c->tmps_ix = PL_tmps_ix;
466	c->tmps_max = PL_tmps_max;
467	c->markstack = PL_markstack;
468	c->markstack_ptr = PL_markstack_ptr;
469	c->markstack_max = PL_markstack_max;
470	c->scopestack = PL_scopestack;
471	c->scopestack_ix = PL_scopestack_ix;
472	c->scopestack_max = PL_scopestack_max;
473	c->savestack = PL_savestack;
474	c->savestack_ix = PL_savestack_ix;
475	c->savestack_max = PL_savestack_max;
476	c->retstack = PL_retstack;
477	c->retstack_ix = PL_retstack_ix;
478	c->retstack_max = PL_retstack_max;
479	c->curpm = PL_curpm;
480	c->curcop = PL_curcop;
481	c->top_env = PL_top_env;
482	}	402	}
483		403
484	/*	404	/*
485	* allocate various perl stacks. This is an exact copy	405	* allocate various perl stacks. This is an exact copy
486	* of perl.c:init_stacks, except that it uses less memory	406	* of perl.c:init_stacks, except that it uses less memory
487	* on the (sometimes correct) assumption that coroutines do	407	* on the (sometimes correct) assumption that coroutines do
488	* not usually need a lot of stackspace.	408	* not usually need a lot of stackspace.
489	*/	409	*/
490	STATIC void	410	static void
491	coro_init_stacks (pTHX)	411	coro_init_stacks ()
492	{	412	{
493	LOCK;
494
495	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	413	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
496	PL_curstackinfo->si_type = PERLSI_MAIN;	414	PL_curstackinfo->si_type = PERLSI_MAIN;
497	PL_curstack = PL_curstackinfo->si_stack;	415	PL_curstack = PL_curstackinfo->si_stack;
498	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	416	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499		417
500	PL_stack_base = AvARRAY(PL_curstack);	418	PL_stack_base = AvARRAY(PL_curstack);
501	PL_stack_sp = PL_stack_base;	419	PL_stack_sp = PL_stack_base;
502	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	420	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
503		421
504	New(50,PL_tmps_stack,96,SV*);	422	New(50,PL_tmps_stack,128,SV*);
505	PL_tmps_floor = -1;	423	PL_tmps_floor = -1;
506	PL_tmps_ix = -1;	424	PL_tmps_ix = -1;
507	PL_tmps_max = 96;	425	PL_tmps_max = 128;
508		426
509	New(54,PL_markstack,16,I32);	427	New(54,PL_markstack,32,I32);
510	PL_markstack_ptr = PL_markstack;	428	PL_markstack_ptr = PL_markstack;
511	PL_markstack_max = PL_markstack + 16;	429	PL_markstack_max = PL_markstack + 32;
512		430
513	#ifdef SET_MARK_OFFSET	431	#ifdef SET_MARK_OFFSET
514	SET_MARK_OFFSET;	432	SET_MARK_OFFSET;
515	#endif	433	#endif
516		434
517	New(54,PL_scopestack,16,I32);	435	New(54,PL_scopestack,32,I32);
518	PL_scopestack_ix = 0;	436	PL_scopestack_ix = 0;
519	PL_scopestack_max = 16;	437	PL_scopestack_max = 32;
520		438
521	New(54,PL_savestack,96,ANY);	439	New(54,PL_savestack,64,ANY);
522	PL_savestack_ix = 0;	440	PL_savestack_ix = 0;
523	PL_savestack_max = 96;	441	PL_savestack_max = 64;
524		442
		443	#if !PERL_VERSION_ATLEAST (5,9,0)
525	New(54,PL_retstack,8,OP*);	444	New(54,PL_retstack,16,OP*);
526	PL_retstack_ix = 0;	445	PL_retstack_ix = 0;
527	PL_retstack_max = 8;	446	PL_retstack_max = 16;
528		447	#endif
529	UNLOCK;
530	}	448	}
531		449
532	/*	450	/*
533	* destroy the stacks, the callchain etc...	451	* destroy the stacks, the callchain etc...
534	*/	452	*/
535	STATIC void	453	static void
536	destroy_stacks(pTHX)	454	coro_destroy_stacks ()
537	{	455	{
538	if (!IN_DESTRUCT)	456	if (!IN_DESTRUCT)
539	{	457	{
540	/* is this ugly, I ask? */	458	/* is this ugly, I ask? */
541	LEAVE_SCOPE (0);	459	LEAVE_SCOPE (0);
…		…
572		490
573	Safefree (PL_tmps_stack);	491	Safefree (PL_tmps_stack);
574	Safefree (PL_markstack);	492	Safefree (PL_markstack);
575	Safefree (PL_scopestack);	493	Safefree (PL_scopestack);
576	Safefree (PL_savestack);	494	Safefree (PL_savestack);
		495	#if !PERL_VERSION_ATLEAST (5,9,0)
577	Safefree (PL_retstack);	496	Safefree (PL_retstack);
578	}
579
580	static void
581	allocate_stack (Coro__State ctx, int alloc)
582	{
583	coro_stack *stack;
584
585	New (0, stack, 1, coro_stack);
586
587	stack->refcnt = 1;
588	stack->usecnt = 1;
589	stack->gencnt = ctx->gencnt = 0;
590
591	if (alloc)
592	{
593	#if HAVE_MMAP
594	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
595	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
596	if (stack->sptr == (void *)-1)
597	#endif	497	#endif
598	{
599	/*FIXME*//*D*//* reasonable stack size! */
600	stack->ssize = - (8192 * sizeof (long));
601	New (0, stack->sptr, 8192, long);
602	}
603	}
604	else
605	stack->sptr = 0;
606
607	ctx->stack = stack;
608	}	498	}
609		499
610	static void	500	static void
611	deallocate_stack (Coro__State ctx)	501	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	{	502	{
638	/*	503	/*
639	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
640	*/	505	*/
641	dTHX;
642	dSP;
643	Coro__State ctx = (Coro__State)arg;
644	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
645		506
646	coro_init_stacks (aTHX);	507	coro_init_stacks ();
647	/*PL_curcop = 0;*/	508
648	/*PL_in_eval = PL_in_eval;*/ /* inherit */	509	PL_curcop = &PL_compiling;
		510	PL_in_eval = EVAL_NULL;
		511	PL_curpm = 0;
		512	PL_localizing = 0;
		513	PL_dirty = 0;
		514	PL_restartop = 0;
		515
		516	{
		517	dSP;
		518	LOGOP myop;
		519
649	SvREFCNT_dec (GvAV (PL_defgv));	520	SvREFCNT_dec (GvAV (PL_defgv));
650	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	521	GvAV (PL_defgv) = coro->args; coro->args = 0;
651		522
652	SPAGAIN;
653
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);	523	Zero (&myop, 1, LOGOP);
674	myop.op_next = Nullop;	524	myop.op_next = Nullop;
675	myop.op_flags = OPf_WANT_VOID;	525	myop.op_flags = OPf_WANT_VOID;
676		526
677	PUSHMARK(SP);	527	PUSHMARK (SP);
678	XPUSHs (sub_init);	528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
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;	529	PUTBACK;
		530	PL_op = (OP *)&myop;
687	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688	SPAGAIN;	532	SPAGAIN;
		533	}
689		534
690	ENTER; /* necessary e.g. for dounwind */	535	ENTER; /* necessary e.g. for dounwind */
691	}
692	}	536	}
693		537
694	static void	538	static void
695	continue_coro (void *arg)	539	free_coro_mortal ()
696	{	540	{
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)	541	if (coro_mortal)
807	{	542	{
808	SvREFCNT_dec (coro_mortal);	543	SvREFCNT_dec (coro_mortal);
809	coro_mortal = 0;	544	coro_mortal = 0;
810	}	545	}
		546	}
		547
		548	/* inject a fake call to Coro::State::_cctx_init into the execution */
		549	static void NOINLINE
		550	prepare_cctx (coro_cctx *cctx)
		551	{
		552	dSP;
		553	LOGOP myop;
		554
		555	Zero (&myop, 1, LOGOP);
		556	myop.op_next = PL_op;
		557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		558
		559	PUSHMARK (SP);
		560	EXTEND (SP, 2);
		561	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		562	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		563	PUTBACK;
		564	PL_op = (OP *)&myop;
		565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		566	SPAGAIN;
		567	}
		568
		569	static void
		570	coro_run (void *arg)
		571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
811	UNLOCK;	573	UNLOCK;
812	}
813		574
814	#define SV_CORO(sv,func) \	575	/*
815	do { \	576	* this is a _very_ stripped down perl interpreter ;)
816	if (SvROK (sv)) \	577	*/
817	sv = SvRV (sv); \	578	PL_top_env = &PL_start_env;
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		579
835	#define SvSTATE(sv) (struct coro *)SvIV (sv)	580	/* inject call to cctx_init */
		581	prepare_cctx ((coro_cctx *)arg);
836		582
		583	/* somebody will hit me for both perl_run and PL_restartop */
		584	PL_restartop = PL_op;
		585	perl_run (PL_curinterp);
		586
		587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		588	abort ();
		589	}
		590
		591	static coro_cctx *
		592	cctx_new ()
		593	{
		594	coro_cctx *cctx;
		595
		596	++cctx_count;
		597
		598	New (0, cctx, 1, coro_cctx);
		599
		600	#if HAVE_MMAP
		601
		602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		603	/* mmap supposedly does allocate-on-write for us */
		604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		605
		606	if (cctx->sptr == (void *)-1)
		607	{
		608	perror ("FATAL: unable to mmap stack for coroutine");
		609	_exit (EXIT_FAILURE);
		610	}
		611
		612	# if STACKGUARD
		613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		614	# endif
		615
		616	#else
		617
		618	cctx->ssize = STACKSIZE * (long)sizeof (long);
		619	New (0, cctx->sptr, STACKSIZE, long);
		620
		621	if (!cctx->sptr)
		622	{
		623	perror ("FATAL: unable to malloc stack for coroutine");
		624	_exit (EXIT_FAILURE);
		625	}
		626
		627	#endif
		628
		629	#if USE_VALGRIND
		630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		632	cctx->ssize + (char *)cctx->sptr
		633	);
		634	#endif
		635
		636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		637
		638	return cctx;
		639	}
		640
		641	static void
		642	cctx_destroy (coro_cctx *cctx)
		643	{
		644	if (!cctx)
		645	return;
		646
		647	--cctx_count;
		648
		649	#if USE_VALGRIND
		650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		651	#endif
		652
		653	#if HAVE_MMAP
		654	munmap (cctx->sptr, cctx->ssize);
		655	#else
		656	Safefree (cctx->sptr);
		657	#endif
		658
		659	Safefree (cctx);
		660	}
		661
		662	static coro_cctx *
		663	cctx_get ()
		664	{
		665	coro_cctx *cctx;
		666
		667	if (cctx_first)
		668	{
		669	cctx = cctx_first;
		670	cctx_first = cctx->next;
		671	--cctx_idle;
		672	}
		673	else
		674	{
		675	cctx = cctx_new ();
		676	PL_op = PL_op->op_next;
		677	}
		678
		679	return cctx;
		680	}
		681
		682	static void
		683	cctx_put (coro_cctx *cctx)
		684	{
		685	/* free another cctx if overlimit */
		686	if (cctx_idle >= MAX_IDLE_CCTX)
		687	{
		688	coro_cctx *first = cctx_first;
		689	cctx_first = first->next;
		690	--cctx_idle;
		691
		692	assert (!first->inuse);
		693	cctx_destroy (first);
		694	}
		695
		696	++cctx_idle;
		697	cctx->next = cctx_first;
		698	cctx_first = cctx;
		699	}
		700
		701	/* never call directly, always through the coro_state_transfer global variable */
		702	static void NOINLINE
		703	transfer (struct coro *prev, struct coro *next)
		704	{
		705	dSTACKLEVEL;
		706
		707	/* sometimes transfer is only called to set idle_sp */
		708	if (!next)
		709	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		710	else if (prev != next)
		711	{
		712	coro_cctx *prev__cctx;
		713
		714	if (prev->flags & CF_NEW)
		715	{
		716	/* create a new empty context */
		717	Newz (0, prev->cctx, 1, coro_cctx);
		718	prev->cctx->inuse = 1;
		719	prev->flags &= ~CF_NEW;
		720	prev->flags |= CF_RUNNING;
		721	}
		722
		723	/*TODO: must not croak here */
		724	if (!prev->flags & CF_RUNNING)
		725	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		726
		727	if (next->flags & CF_RUNNING)
		728	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		729
		730	prev->flags &= ~CF_RUNNING;
		731	next->flags |= CF_RUNNING;
		732
		733	LOCK;
		734
		735	if (next->flags & CF_NEW)
		736	{
		737	/* need to start coroutine */
		738	next->flags &= ~CF_NEW;
		739	/* first get rid of the old state */
		740	save_perl (prev);
		741	/* setup coroutine call */
		742	setup_coro (next);
		743	/* need a new stack */
		744	assert (!next->stack);
		745	}
		746	else
		747	{
		748	/* coroutine already started */
		749	save_perl (prev);
		750	load_perl (next);
		751	}
		752
		753	prev__cctx = prev->cctx;
		754
		755	/* possibly "free" the cctx */
		756	if (prev__cctx->idle_sp == STACKLEVEL)
		757	{
		758	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		759	assert (PL_top_env == prev__cctx->top_env);
		760
		761	prev->cctx = 0;
		762
		763	cctx_put (prev__cctx);
		764	prev__cctx->inuse = 0;
		765	}
		766
		767	if (!next->cctx)
		768	{
		769	next->cctx = cctx_get ();
		770	assert (!next->cctx->inuse);
		771	next->cctx->inuse = 1;
		772	}
		773
		774	if (prev__cctx != next->cctx)
		775	{
		776	prev__cctx->top_env = PL_top_env;
		777	PL_top_env = next->cctx->top_env;
		778	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		779	}
		780
		781	free_coro_mortal ();
		782
		783	UNLOCK;
		784	}
		785	}
		786
		787	struct transfer_args
		788	{
		789	struct coro *prev, *next;
		790	};
		791
		792	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		793
		794	static void
		795	coro_state_destroy (struct coro *coro)
		796	{
		797	if (coro->refcnt--)
		798	return;
		799
		800	if (coro->mainstack && coro->mainstack != main_mainstack)
		801	{
		802	struct coro temp;
		803	Zero (&temp, 1, struct coro);
		804	temp.save = CORO_SAVE_ALL;
		805
		806	if (coro->flags & CF_RUNNING)
		807	croak ("FATAL: tried to destroy currently running coroutine");
		808
		809	save_perl (&temp);
		810	load_perl (coro);
		811
		812	coro_destroy_stacks ();
		813
		814	load_perl (&temp); /* this will get rid of defsv etc.. */
		815
		816	coro->mainstack = 0;
		817	}
		818
		819	cctx_destroy (coro->cctx);
		820	SvREFCNT_dec (coro->args);
		821	Safefree (coro);
		822	}
		823
837	static void	824	static int
		825	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		826	{
		827	struct coro *coro = (struct coro *)mg->mg_ptr;
		828	mg->mg_ptr = 0;
		829
		830	coro_state_destroy (coro);
		831
		832	return 0;
		833	}
		834
		835	static int
		836	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		837	{
		838	struct coro *coro = (struct coro *)mg->mg_ptr;
		839
		840	++coro->refcnt;
		841
		842	return 0;
		843	}
		844
		845	static MGVTBL coro_state_vtbl = {
		846	0, 0, 0, 0,
		847	coro_state_clear,
		848	0,
		849	#ifdef MGf_DUP
		850	coro_state_dup,
		851	#else
		852	# define MGf_DUP 0
		853	#endif
		854	};
		855
		856	static struct coro *
		857	SvSTATE (SV *coro)
		858	{
		859	HV *stash;
		860	MAGIC *mg;
		861
		862	if (SvROK (coro))
		863	coro = SvRV (coro);
		864
		865	stash = SvSTASH (coro);
		866	if (stash != coro_stash && stash != coro_state_stash)
		867	{
		868	/* very slow, but rare, check */
		869	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		870	croak ("Coro::State object required");
		871	}
		872
		873	mg = SvMAGIC (coro);
		874	assert (mg->mg_type == PERL_MAGIC_ext);
		875	return (struct coro *)mg->mg_ptr;
		876	}
		877
		878	static void
		879	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		880	{
		881	ta->prev = SvSTATE (prev_sv);
		882	ta->next = SvSTATE (next_sv);
		883	}
		884
		885	static void
838	api_transfer(pTHX_ SV *prev, SV *next, int flags)	886	api_transfer (SV *prev_sv, SV *next_sv)
839	{	887	{
840	SV_CORO (prev, "Coro::transfer");	888	struct transfer_args ta;
841	SV_CORO (next, "Coro::transfer");
842		889
843	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	890	prepare_transfer (&ta, prev_sv, next_sv);
		891	TRANSFER (ta);
		892	}
		893
		894	static int
		895	api_save (SV *coro_sv, int new_save)
		896	{
		897	struct coro *coro = SvSTATE (coro_sv);
		898	int old_save = coro->save;
		899
		900	if (new_save >= 0)
		901	coro->save = new_save;
		902
		903	return old_save;
844	}	904	}
845		905
846	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
847		907
848	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
851	#define PRIO_LOW -1	911	#define PRIO_LOW -1
852	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
853	#define PRIO_MIN -4	913	#define PRIO_MIN -4
854		914
855	/* for Coro.pm */	915	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;	916	static SV *coro_current;
857	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;	918	static int coro_nready;
859		919
860	static void	920	static void
861	coro_enq (pTHX_ SV *sv)	921	coro_enq (SV *coro_sv)
862	{	922	{
863	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);	923	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
873	coro_nready++;	924	coro_nready++;
874
875	return;
876	}
877
878	croak ("Coro::ready tried to enqueue something that is not a coroutine");
879	}	925	}
880		926
881	static SV *	927	static SV *
882	coro_deq (pTHX_ int min_prio)	928	coro_deq (int min_prio)
883	{	929	{
884	int prio = PRIO_MAX - PRIO_MIN;	930	int prio = PRIO_MAX - PRIO_MIN;
885		931
886	min_prio -= PRIO_MIN;	932	min_prio -= PRIO_MIN;
887	if (min_prio < 0)	933	if (min_prio < 0)
888	min_prio = 0;	934	min_prio = 0;
889		935
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	936	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (av_len (coro_ready[prio]) >= 0)	937	if (AvFILLp (coro_ready [prio]) >= 0)
892	{	938	{
893	coro_nready--;	939	coro_nready--;
894	return av_shift (coro_ready[prio]);	940	return av_shift (coro_ready [prio]);
895	}	941	}
896		942
897	return 0;	943	return 0;
898	}	944	}
899		945
900	static void	946	static int
901	api_ready (SV *coro)	947	api_ready (SV *coro_sv)
902	{	948	{
903	dTHX;	949	struct coro *coro;
904		950
905	if (SvROK (coro))	951	if (SvROK (coro_sv))
906	coro = SvRV (coro);	952	coro_sv = SvRV (coro_sv);
		953
		954	coro = SvSTATE (coro_sv);
		955
		956	if (coro->flags & CF_READY)
		957	return 0;
		958
		959	#if 0 /* this is actually harmless */
		960	if (coro->flags & CF_RUNNING)
		961	croak ("Coro::ready called on currently running coroutine");
		962	#endif
		963
		964	coro->flags |= CF_READY;
907		965
908	LOCK;	966	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	967	coro_enq (SvREFCNT_inc (coro_sv));
910	UNLOCK;	968	UNLOCK;
		969
		970	return 1;
		971	}
		972
		973	static int
		974	api_is_ready (SV *coro_sv)
		975	{
		976	return !!SvSTATE (coro_sv)->flags & CF_READY;
		977	}
		978
		979	static void
		980	prepare_schedule (struct transfer_args *ta)
		981	{
		982	SV *prev, *next;
		983
		984	for (;;)
		985	{
		986	LOCK;
		987	next = coro_deq (PRIO_MIN);
		988	UNLOCK;
		989
		990	if (next)
		991	break;
		992
		993	{
		994	dSP;
		995
		996	ENTER;
		997	SAVETMPS;
		998
		999	PUSHMARK (SP);
		1000	PUTBACK;
		1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1002
		1003	FREETMPS;
		1004	LEAVE;
		1005	}
		1006	}
		1007
		1008	prev = SvRV (coro_current);
		1009	SvRV_set (coro_current, next);
		1010
		1011	/* free this only after the transfer */
		1012	LOCK;
		1013	free_coro_mortal ();
		1014	UNLOCK;
		1015	coro_mortal = prev;
		1016
		1017	assert (!SvROK(prev));//D
		1018	assert (!SvROK(next));//D
		1019
		1020	ta->prev = SvSTATE (prev);
		1021	ta->next = SvSTATE (next);
		1022
		1023	assert (ta->next->flags & CF_READY);
		1024	ta->next->flags &= ~CF_READY;
		1025	}
		1026
		1027	static void
		1028	prepare_cede (struct transfer_args *ta)
		1029	{
		1030	api_ready (coro_current);
		1031
		1032	prepare_schedule (ta);
911	}	1033	}
912		1034
913	static void	1035	static void
914	api_schedule (void)	1036	api_schedule (void)
915	{	1037	{
916	dTHX;	1038	struct transfer_args ta;
917		1039
918	SV *prev, *next;	1040	prepare_schedule (&ta);
919		1041	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	}	1042	}
941		1043
942	static void	1044	static void
943	api_cede (void)	1045	api_cede (void)
944	{	1046	{
945	dTHX;	1047	struct transfer_args ta;
946		1048
947	LOCK;	1049	prepare_cede (&ta);
948	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1050	TRANSFER (ta);
949	UNLOCK;
950
951	api_schedule ();
952	}	1051	}
953		1052
954	MODULE = Coro::State PACKAGE = Coro::State	1053	MODULE = Coro::State PACKAGE = Coro::State
955		1054
956	PROTOTYPES: ENABLE	1055	PROTOTYPES: DISABLE
957		1056
958	BOOT:	1057	BOOT:
959	{ /* {} necessary for stoopid perl-5.6.x */	1058	{
960	#ifdef USE_ITHREADS	1059	#ifdef USE_ITHREADS
961	MUTEX_INIT (&coro_mutex);	1060	MUTEX_INIT (&coro_mutex);
962	#endif	1061	#endif
		1062	BOOT_PAGESIZE;
963		1063
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);	1064	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1065
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1066	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1067	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1068	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1069	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
971	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1070	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
972		1071
973	main_mainstack = PL_mainstack;	1072	main_mainstack = PL_mainstack;
974		1073
975	coroapi.ver = CORO_API_VERSION;	1074	coroapi.ver = CORO_API_VERSION;
976	coroapi.transfer = api_transfer;	1075	coroapi.transfer = api_transfer;
977	}
978		1076
979	Coro::State	1077	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
980	_newprocess(args)	1078	}
981	SV * args	1079
982	PROTOTYPE: $	1080	SV *
		1081	new (char *klass, ...)
983	CODE:	1082	CODE:
984	Coro__State coro;	1083	{
		1084	struct coro *coro;
		1085	HV *hv;
		1086	int i;
985		1087
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);	1088	Newz (0, coro, 1, struct coro);
		1089	coro->args = newAV ();
		1090	coro->save = CORO_SAVE_ALL;
		1091	coro->flags = CF_NEW;
990		1092
991	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1093	hv = newHV ();
992	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1094	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
993	/*coro->stack = 0;*/	1095	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994		1096
995	/* same as JMPENV_BOOTSTRAP */	1097	for (i = 1; i < items; i++)
996	/* we might be able to recycle start_env, but safe is safe */	1098	av_push (coro->args, newSVsv (ST (i)));
997	/*Zero(&coro->start_env, 1, JMPENV);*/	1099	}
998	coro->start_env.je_ret = -1;
999	coro->start_env.je_mustcatch = TRUE;
1000
1001	RETVAL = coro;
1002	OUTPUT:	1100	OUTPUT:
1003	RETVAL	1101	RETVAL
1004		1102
		1103	int
		1104	save (SV *coro, int new_save = -1)
		1105	CODE:
		1106	RETVAL = api_save (coro, new_save);
		1107	OUTPUT:
		1108	RETVAL
		1109
1005	void	1110	void
1006	transfer(prev, next, flags)	1111	_set_stacklevel (...)
1007	SV *prev	1112	ALIAS:
1008	SV *next	1113	Coro::State::transfer = 1
1009	int flags	1114	Coro::schedule = 2
1010	PROTOTYPE: @	1115	Coro::cede = 3
1011	CODE:	1116	CODE:
1012	PUTBACK;	1117	{
1013	SV_CORO (next, "Coro::transfer");	1118	struct transfer_args ta;
1014	SV_CORO (prev, "Coro::transfer");	1119
1015	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1120	switch (ix)
1016	SPAGAIN;	1121	{
		1122	case 0:
		1123	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1124	ta.next = 0;
		1125	break;
		1126
		1127	case 1:
		1128	if (items != 2)
		1129	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1130
		1131	prepare_transfer (&ta, ST (0), ST (1));
		1132	break;
		1133
		1134	case 2:
		1135	prepare_schedule (&ta);
		1136	break;
		1137
		1138	case 3:
		1139	prepare_cede (&ta);
		1140	break;
		1141	}
		1142
		1143	TRANSFER (ta);
		1144	}
1017		1145
1018	void	1146	void
1019	DESTROY(coro)	1147	_clone_state_from (SV *dst, SV *src)
1020	Coro::State coro	1148	CODE:
1021	CODE:	1149	{
		1150	struct coro *coro_src = SvSTATE (src);
1022		1151
1023	if (coro->mainstack && coro->mainstack != main_mainstack)	1152	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1024	{
1025	struct coro temp;
1026		1153
1027	PUTBACK;	1154	++coro_src->refcnt;
1028	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1155	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1029	LOAD (aTHX_ coro);	1156	}
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		1157
1044	void	1158	void
1045	_exit(code)	1159	_exit (code)
1046	int code	1160	int code
1047	PROTOTYPE: $	1161	PROTOTYPE: $
1048	CODE:	1162	CODE:
1049	_exit (code);	1163	_exit (code);
1050		1164
1051	MODULE = Coro::State PACKAGE = Coro::Cont	1165	int
		1166	cctx_count ()
		1167	CODE:
		1168	RETVAL = cctx_count;
		1169	OUTPUT:
		1170	RETVAL
1052		1171
1053	# this is slightly dirty (should expose a c-level api)	1172	int
1054		1173	cctx_idle ()
1055	void	1174	CODE:
1056	yield(...)	1175	RETVAL = cctx_idle;
1057	PROTOTYPE: @	1176	OUTPUT:
1058	CODE:	1177	RETVAL
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		1178
1083	MODULE = Coro::State PACKAGE = Coro	1179	MODULE = Coro::State PACKAGE = Coro
1084		1180
1085	# this is slightly dirty (should expose a c-level api)
1086
1087	BOOT:	1181	BOOT:
1088	{	1182	{
1089	int i;	1183	int i;
		1184
1090	HV *stash = gv_stashpv ("Coro", TRUE);	1185	coro_stash = gv_stashpv ("Coro", TRUE);
1091		1186
1092	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1187	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1093	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1188	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1094	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1189	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1095	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1190	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1096	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1191	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1097	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1192	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1098		1193
1099	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1194	coro_current = get_sv ("Coro::current", FALSE);
1100	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1195	SvREADONLY_on (coro_current);
1101		1196
1102	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1197	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1103	coro_ready[i] = newAV ();	1198	coro_ready[i] = newAV ();
1104		1199
1105	{	1200	{
1106	SV *sv = perl_get_sv("Coro::API", 1);	1201	SV *sv = perl_get_sv("Coro::API", 1);
1107		1202
1108	coroapi.schedule = api_schedule;	1203	coroapi.schedule = api_schedule;
		1204	coroapi.save = api_save;
1109	coroapi.cede = api_cede;	1205	coroapi.cede = api_cede;
1110	coroapi.ready = api_ready;	1206	coroapi.ready = api_ready;
		1207	coroapi.is_ready = api_is_ready;
1111	coroapi.nready = &coro_nready;	1208	coroapi.nready = &coro_nready;
1112	coroapi.current = coro_current;	1209	coroapi.current = coro_current;
1113		1210
1114	GCoroAPI = &coroapi;	1211	GCoroAPI = &coroapi;
1115	sv_setiv(sv, (IV)&coroapi);	1212	sv_setiv (sv, (IV)&coroapi);
1116	SvREADONLY_on(sv);	1213	SvREADONLY_on (sv);
1117	}	1214	}
1118	}	1215	}
1119		1216
1120	#if !PERL_MICRO
1121
1122	void	1217	void
1123	ready(self)	1218	_set_current (SV *current)
1124	SV * self
1125	PROTOTYPE: $	1219	PROTOTYPE: $
1126	CODE:	1220	CODE:
1127	api_ready (self);	1221	SvREFCNT_dec (SvRV (coro_current));
1128		1222	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1129	#endif
1130		1223
1131	int	1224	int
		1225	prio (Coro::State coro, int newprio = 0)
		1226	ALIAS:
		1227	nice = 1
		1228	CODE:
		1229	{
		1230	RETVAL = coro->prio;
		1231
		1232	if (items > 1)
		1233	{
		1234	if (ix)
		1235	newprio += coro->prio;
		1236
		1237	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1238	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1239
		1240	coro->prio = newprio;
		1241	}
		1242	}
		1243
		1244	SV *
		1245	ready (SV *self)
		1246	PROTOTYPE: $
		1247	CODE:
		1248	RETVAL = boolSV (api_ready (self));
		1249	OUTPUT:
		1250	RETVAL
		1251
		1252	SV *
		1253	is_ready (SV *self)
		1254	PROTOTYPE: $
		1255	CODE:
		1256	RETVAL = boolSV (api_is_ready (self));
		1257	OUTPUT:
		1258	RETVAL
		1259
		1260	int
1132	nready(...)	1261	nready (...)
1133	PROTOTYPE:	1262	PROTOTYPE:
1134	CODE:	1263	CODE:
1135	RETVAL = coro_nready;	1264	RETVAL = coro_nready;
1136	OUTPUT:	1265	OUTPUT:
1137	RETVAL	1266	RETVAL
1138		1267
		1268	MODULE = Coro::State PACKAGE = Coro::AIO
		1269
		1270	SV *
		1271	_get_state ()
		1272	CODE:
		1273	{
		1274	struct io_state *data;
		1275
		1276	RETVAL = newSV (sizeof (struct io_state));
		1277	data = (struct io_state *)SvPVX (RETVAL);
		1278	SvCUR_set (RETVAL, sizeof (struct io_state));
		1279	SvPOK_only (RETVAL);
		1280
		1281	data->errorno = errno;
		1282	data->laststype = PL_laststype;
		1283	data->laststatval = PL_laststatval;
		1284	data->statcache = PL_statcache;
		1285	}
		1286	OUTPUT:
		1287	RETVAL
		1288
1139	void	1289	void
1140	schedule(...)	1290	_set_state (char *data_)
1141	PROTOTYPE:	1291	PROTOTYPE: $
1142	CODE:	1292	CODE:
1143	api_schedule ();	1293	{
		1294	struct io_state *data = (void *)data_;
1144		1295
1145	void	1296	errno = data->errorno;
1146	cede(...)	1297	PL_laststype = data->laststype;
1147	PROTOTYPE:	1298	PL_laststatval = data->laststatval;
1148	CODE:	1299	PL_statcache = data->statcache;
1149	api_cede ();	1300	}
1150		1301

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