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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.109 by root, Mon Nov 27 18:45:29 2006 UTC vs.
Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
74	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
75	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	95	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
79		98
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		100
82	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	104	#else
85	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
86	#endif	107	#endif
87		108
88	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
89		110
90	#include "CoroAPI.h"	111	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		112
94	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	117	#else
99	# define LOCK (void)0	118	# define LOCK (void)0
100	# define UNLOCK (void)0	119	# define UNLOCK (void)0
101	#endif	120	#endif
102		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
105	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
107		136
…		…
112	typedef struct coro_cctx {	141	typedef struct coro_cctx {
113	struct coro_cctx *next;	142	struct coro_cctx *next;
114		143
115	/* the stack */	144	/* the stack */
116	void *sptr;	145	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
118		147
119	/* cpu state */	148	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	151	JMPENV *top_env;
122	coro_context cctx;	152	coro_context cctx;
123		153
124	#if USE_VALGRIND	154	#if CORO_USE_VALGRIND
125	int valgrind_id;	155	int valgrind_id;
126	#endif	156	#endif
		157	char inuse, mapped;
127	} coro_cctx;	158	} coro_cctx;
		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
128		166
129	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
130	struct coro {	168	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	170	coro_cctx *cctx;
133		171
134	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
135	AV *args;	173	AV *args;
136	int refcnt;	174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
137		177
138	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
139	AV *defav;	179	AV *defav; /* @_ */
140	SV *defsv;	180	SV *defsv; /* $_ */
141	SV *errsv;	181	SV *errsv; /* $@ */
		182	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
142		185
143	#define VAR(name,type) type name;	186	#define VAR(name,type) type name;
144	# include "state.h"	187	# include "state.h"
145	#undef VAR	188	#undef VAR
146		189
…		…
149	};	192	};
150		193
151	typedef struct coro *Coro__State;	194	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	195	typedef struct coro *Coro__State_or_hashref;
153		196
		197	/** Coro ********************************************************************/
		198
		199	#define PRIO_MAX 3
		200	#define PRIO_HIGH 1
		201	#define PRIO_NORMAL 0
		202	#define PRIO_LOW -1
		203	#define PRIO_IDLE -3
		204	#define PRIO_MIN -4
		205
		206	/* for Coro.pm */
		207	static SV *coro_current;
		208	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		209	static int coro_nready;
		210
		211	/** lowlevel stuff **********************************************************/
		212
154	static AV *	213	static AV *
155	coro_clone_padlist (CV *cv)	214	coro_clone_padlist (pTHX_ CV *cv)
156	{	215	{
157	AV *padlist = CvPADLIST (cv);	216	AV *padlist = CvPADLIST (cv);
158	AV *newpadlist, *newpad;	217	AV *newpadlist, *newpad;
159		218
160	newpadlist = newAV ();	219	newpadlist = newAV ();
…		…
172		231
173	return newpadlist;	232	return newpadlist;
174	}	233	}
175		234
176	static void	235	static void
177	free_padlist (AV *padlist)	236	free_padlist (pTHX_ AV *padlist)
178	{	237	{
179	/* may be during global destruction */	238	/* may be during global destruction */
180	if (SvREFCNT (padlist))	239	if (SvREFCNT (padlist))
181	{	240	{
182	I32 i = AvFILLp (padlist);	241	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	262	AV *padlist;
204	AV *av = (AV *)mg->mg_obj;	263	AV *av = (AV *)mg->mg_obj;
205		264
206	/* casting is fun. */	265	/* casting is fun. */
207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	266	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208	free_padlist (padlist);	267	free_padlist (aTHX_ padlist);
209		268
210	SvREFCNT_dec (av);	269	SvREFCNT_dec (av);
211		270
212	return 0;	271	return 0;
213	}	272	}
…		…
223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	282	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
224	: 0	283	: 0
225		284
226	/* the next two functions merely cache the padlists */	285	/* the next two functions merely cache the padlists */
227	static void	286	static void
228	get_padlist (CV *cv)	287	get_padlist (pTHX_ CV *cv)
229	{	288	{
230	MAGIC *mg = CORO_MAGIC (cv);	289	MAGIC *mg = CORO_MAGIC (cv);
231	AV *av;	290	AV *av;
232		291
233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	292	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	293	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	294	else
236	{	295	{
237	#if 0	296	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this is probably cleaner, but also slower? */	297	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (cv);	298	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	299	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	300	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	301	SvREFCNT_dec (cp);
243	#else	302	#else
244	CvPADLIST (cv) = coro_clone_padlist (cv);	303	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
245	#endif	304	#endif
246	}	305	}
247	}	306	}
248		307
249	static void	308	static void
250	put_padlist (CV *cv)	309	put_padlist (pTHX_ CV *cv)
251	{	310	{
252	MAGIC *mg = CORO_MAGIC (cv);	311	MAGIC *mg = CORO_MAGIC (cv);
253	AV *av;	312	AV *av;
254		313
255	if (!mg)	314	if (!mg)
…		…
266	av_extend (av, AvMAX (av) + 1);	325	av_extend (av, AvMAX (av) + 1);
267		326
268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	327	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	328	}
270		329
		330	/** load & save, init *******************************************************/
		331
271	#define SB do {	332	#define SB do {
272	#define SE } while (0)	333	#define SE } while (0)
273		334
274	#define LOAD(state) load_state((state));
275	#define SAVE(state,flags) save_state((state),(flags));
276
277	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	335	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
278		336
279	static void	337	static void
280	load_state(Coro__State c)	338	load_perl (pTHX_ Coro__State c)
281	{	339	{
282	#define VAR(name,type) PL_ ## name = c->name;	340	#define VAR(name,type) PL_ ## name = c->name;
283	# include "state.h"	341	# include "state.h"
284	#undef VAR	342	#undef VAR
285		343
286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		347	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		348
		349	if (c->irssv)
		350	{
		351	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		352	{
		353	SvREFCNT_dec (c->irssv);
		354	c->irssv = 0;
		355	}
		356	else
		357	{
		358	REPLACE_SV (PL_rs, c->irssv);
		359	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		360	sv_setsv (c->irssv_sv, PL_rs);
		361	}
		362	}
289		363
290	{	364	{
291	dSP;	365	dSP;
292	CV *cv;	366	CV *cv;
293		367
294	/* now do the ugly restore mess */	368	/* now do the ugly restore mess */
295	while ((cv = (CV *)POPs))	369	while ((cv = (CV *)POPs))
296	{	370	{
297	put_padlist (cv); /* mark this padlist as available */	371	put_padlist (aTHX_ cv); /* mark this padlist as available */
298	CvDEPTH (cv) = PTR2IV (POPs);	372	CvDEPTH (cv) = PTR2IV (POPs);
299	CvPADLIST (cv) = (AV *)POPs;	373	CvPADLIST (cv) = (AV *)POPs;
300	}	374	}
301		375
302	PUTBACK;	376	PUTBACK;
303	}	377	}
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
304	}	379	}
305		380
306	static void	381	static void
307	save_state(Coro__State c, int flags)	382	save_perl (pTHX_ Coro__State c)
308	{	383	{
		384	assert (!PL_comppad || AvARRAY (PL_comppad));//D
309	{	385	{
310	dSP;	386	dSP;
311	I32 cxix = cxstack_ix;	387	I32 cxix = cxstack_ix;
312	PERL_CONTEXT *ccstk = cxstack;	388	PERL_CONTEXT *ccstk = cxstack;
313	PERL_SI *top_si = PL_curstackinfo;	389	PERL_SI *top_si = PL_curstackinfo;
…		…
315	/*	391	/*
316	* the worst thing you can imagine happens first - we have to save	392	* the worst thing you can imagine happens first - we have to save
317	* (and reinitialize) all cv's in the whole callchain :(	393	* (and reinitialize) all cv's in the whole callchain :(
318	*/	394	*/
319		395
		396	EXTEND (SP, 3 + 1);
320	PUSHs (Nullsv);	397	PUSHs (Nullsv);
321	/* this loop was inspired by pp_caller */	398	/* this loop was inspired by pp_caller */
322	for (;;)	399	for (;;)
323	{	400	{
324	while (cxix >= 0)	401	while (cxix >= 0)
325	{	402	{
326	PERL_CONTEXT *cx = &ccstk[cxix--];	403	PERL_CONTEXT *cx = &ccstk[cxix--];
327		404
328	if (CxTYPE(cx) == CXt_SUB)	405	if (CxTYPE (cx) == CXt_SUB)
329	{	406	{
330	CV *cv = cx->blk_sub.cv;	407	CV *cv = cx->blk_sub.cv;
331		408
332	if (CvDEPTH (cv))	409	if (CvDEPTH (cv))
333	{	410	{
334	EXTEND (SP, 3);	411	EXTEND (SP, 3);
335
336	PUSHs ((SV *)CvPADLIST(cv));	412	PUSHs ((SV *)CvPADLIST (cv));
337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	413	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
338	PUSHs ((SV *)cv);	414	PUSHs ((SV *)cv);
339		415
340	CvDEPTH (cv) = 0;	416	CvDEPTH (cv) = 0;
341	get_padlist (cv);	417	get_padlist (aTHX_ cv);
342	}	418	}
343	}	419	}
344	#ifdef CXt_FORMAT
345	else if (CxTYPE(cx) == CXt_FORMAT)
346	{
347	/* I never used formats, so how should I know how these are implemented? */
348	/* my bold guess is as a simple, plain sub... */
349	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
350	}
351	#endif
352	}	420	}
353		421
354	if (top_si->si_type == PERLSI_MAIN)	422	if (top_si->si_type == PERLSI_MAIN)
355	break;	423	break;
356		424
…		…
360	}	428	}
361		429
362	PUTBACK;	430	PUTBACK;
363	}	431	}
364		432
365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	433	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	434	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	435	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		436	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		437	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
368		438
369	#define VAR(name,type)c->name = PL_ ## name;	439	#define VAR(name,type)c->name = PL_ ## name;
370	# include "state.h"	440	# include "state.h"
371	#undef VAR	441	#undef VAR
372	}	442	}
…		…
375	* allocate various perl stacks. This is an exact copy	445	* allocate various perl stacks. This is an exact copy
376	* of perl.c:init_stacks, except that it uses less memory	446	* of perl.c:init_stacks, except that it uses less memory
377	* on the (sometimes correct) assumption that coroutines do	447	* on the (sometimes correct) assumption that coroutines do
378	* not usually need a lot of stackspace.	448	* not usually need a lot of stackspace.
379	*/	449	*/
		450	#if CORO_PREFER_PERL_FUNCTIONS
		451	# define coro_init_stacks init_stacks
		452	#else
380	static void	453	static void
381	coro_init_stacks ()	454	coro_init_stacks (pTHX)
382	{	455	{
383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	456	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
384	PL_curstackinfo->si_type = PERLSI_MAIN;	457	PL_curstackinfo->si_type = PERLSI_MAIN;
385	PL_curstack = PL_curstackinfo->si_stack;	458	PL_curstack = PL_curstackinfo->si_stack;
386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
387		460
388	PL_stack_base = AvARRAY(PL_curstack);	461	PL_stack_base = AvARRAY(PL_curstack);
389	PL_stack_sp = PL_stack_base;	462	PL_stack_sp = PL_stack_base;
390	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
391		464
392	New(50,PL_tmps_stack,96,SV*);	465	New(50,PL_tmps_stack,128,SV*);
393	PL_tmps_floor = -1;	466	PL_tmps_floor = -1;
394	PL_tmps_ix = -1;	467	PL_tmps_ix = -1;
395	PL_tmps_max = 96;	468	PL_tmps_max = 128;
396		469
397	New(54,PL_markstack,16,I32);	470	New(54,PL_markstack,32,I32);
398	PL_markstack_ptr = PL_markstack;	471	PL_markstack_ptr = PL_markstack;
399	PL_markstack_max = PL_markstack + 16;	472	PL_markstack_max = PL_markstack + 32;
400		473
401	#ifdef SET_MARK_OFFSET	474	#ifdef SET_MARK_OFFSET
402	SET_MARK_OFFSET;	475	SET_MARK_OFFSET;
403	#endif	476	#endif
404		477
405	New(54,PL_scopestack,16,I32);	478	New(54,PL_scopestack,32,I32);
406	PL_scopestack_ix = 0;	479	PL_scopestack_ix = 0;
407	PL_scopestack_max = 16;	480	PL_scopestack_max = 32;
408		481
409	New(54,PL_savestack,96,ANY);	482	New(54,PL_savestack,64,ANY);
410	PL_savestack_ix = 0;	483	PL_savestack_ix = 0;
411	PL_savestack_max = 96;	484	PL_savestack_max = 64;
412		485
413	#if !PERL_VERSION_ATLEAST (5,9,0)	486	#if !PERL_VERSION_ATLEAST (5,9,0)
414	New(54,PL_retstack,8,OP*);	487	New(54,PL_retstack,16,OP*);
415	PL_retstack_ix = 0;	488	PL_retstack_ix = 0;
416	PL_retstack_max = 8;	489	PL_retstack_max = 16;
417	#endif	490	#endif
418	}	491	}
		492	#endif
419		493
420	/*	494	/*
421	* destroy the stacks, the callchain etc...	495	* destroy the stacks, the callchain etc...
422	*/	496	*/
423	static void	497	static void
424	coro_destroy_stacks ()	498	coro_destroy_stacks (pTHX)
425	{	499	{
426	if (!IN_DESTRUCT)	500	if (!IN_DESTRUCT)
427	{	501	{
428	/* is this ugly, I ask? */	502	/* restore all saved variables and stuff */
429	LEAVE_SCOPE (0);	503	LEAVE_SCOPE (0);
		504	assert (PL_tmps_floor == -1);
430		505
431	/* sure it is, but more important: is it correct?? :/ */	506	/* free all temporaries */
432	FREETMPS;	507	FREETMPS;
		508	assert (PL_tmps_ix == -1);
433		509
		510	/* unwind all extra stacks */
434	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	511	POPSTACK_TO (PL_mainstack);
		512
		513	/* unwind main stack */
		514	dounwind (-1);
435	}	515	}
436		516
437	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
438	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
439		519
440	while (PL_curstackinfo)	520	while (PL_curstackinfo)
441	{	521	{
442	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
443		523
444	{ /*D*//*remove*/
445	dSP;
446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
447	PUTBACK; /* possibly superfluous */
448	}
449
450	if (!IN_DESTRUCT)	524	if (!IN_DESTRUCT)
451	{
452	dounwind (-1);/*D*//*remove*/
453	SvREFCNT_dec (PL_curstackinfo->si_stack);	525	SvREFCNT_dec (PL_curstackinfo->si_stack);
454	}
455		526
456	Safefree (PL_curstackinfo->si_cxstack);	527	Safefree (PL_curstackinfo->si_cxstack);
457	Safefree (PL_curstackinfo);	528	Safefree (PL_curstackinfo);
458	PL_curstackinfo = p;	529	PL_curstackinfo = p;
459	}	530	}
…		…
465	#if !PERL_VERSION_ATLEAST (5,9,0)	536	#if !PERL_VERSION_ATLEAST (5,9,0)
466	Safefree (PL_retstack);	537	Safefree (PL_retstack);
467	#endif	538	#endif
468	}	539	}
469		540
		541	/** coroutine stack handling ************************************************/
		542
470	static void	543	static void
471	setup_coro (struct coro *coro)	544	setup_coro (pTHX_ struct coro *coro)
472	{	545	{
473	/*	546	/*
474	* emulate part of the perl startup here.	547	* emulate part of the perl startup here.
475	*/	548	*/
476
477	coro_init_stacks ();	549	coro_init_stacks (aTHX);
478		550
		551	PL_curcop = &PL_compiling;
		552	PL_in_eval = EVAL_NULL;
479	PL_curcop = 0;	553	PL_comppad = 0;
480	PL_in_eval = 0;
481	PL_curpm = 0;	554	PL_curpm = 0;
		555	PL_localizing = 0;
		556	PL_dirty = 0;
		557	PL_restartop = 0;
482		558
483	{	559	{
484	dSP;	560	dSP;
485	LOGOP myop;	561	LOGOP myop;
486		562
487	/* I have no idea why this is needed, but it is */
488	PUSHMARK (SP);
489
490	SvREFCNT_dec (GvAV (PL_defgv));	563	SvREFCNT_dec (GvAV (PL_defgv));
491	GvAV (PL_defgv) = coro->args; coro->args = 0;	564	GvAV (PL_defgv) = coro->args; coro->args = 0;
492		565
493	Zero (&myop, 1, LOGOP);	566	Zero (&myop, 1, LOGOP);
494	myop.op_next = Nullop;	567	myop.op_next = Nullop;
495	myop.op_flags = OPf_WANT_VOID;	568	myop.op_flags = OPf_WANT_VOID;
496		569
497	PL_op = (OP *)&myop;
498
499	PUSHMARK (SP);	570	PUSHMARK (SP);
500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	571	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
501	PUTBACK;	572	PUTBACK;
		573	PL_op = (OP *)&myop;
502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
503	SPAGAIN;	575	SPAGAIN;
504
505	ENTER; /* necessary e.g. for dounwind */
506	}	576	}
507	}
508		577
		578	ENTER; /* necessary e.g. for dounwind */
		579	}
		580
509	static void	581	static void
510	free_coro_mortal ()	582	free_coro_mortal (pTHX)
511	{	583	{
512	if (coro_mortal)	584	if (coro_mortal)
513	{	585	{
514	SvREFCNT_dec (coro_mortal);	586	SvREFCNT_dec (coro_mortal);
515	coro_mortal = 0;	587	coro_mortal = 0;
516	}	588	}
517	}	589	}
518		590
		591	/* inject a fake call to Coro::State::_cctx_init into the execution */
519	static void NOINLINE	592	static void NOINLINE
520	prepare_cctx (coro_cctx *cctx)	593	prepare_cctx (pTHX_ coro_cctx *cctx)
521	{	594	{
522	dSP;	595	dSP;
523	LOGOP myop;	596	LOGOP myop;
524		597
525	Zero (&myop, 1, LOGOP);	598	Zero (&myop, 1, LOGOP);
526	myop.op_next = PL_op;	599	myop.op_next = PL_op;
527	myop.op_flags = OPf_WANT_VOID;	600	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
528
529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530		601
531	PUSHMARK (SP);	602	PUSHMARK (SP);
		603	EXTEND (SP, 2);
		604	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	605	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533	PUTBACK;	606	PUTBACK;
		607	PL_op = (OP *)&myop;
534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535	SPAGAIN;	609	SPAGAIN;
536	}	610	}
537		611
538	static void	612	static void
539	coro_run (void *arg)	613	coro_run (void *arg)
540	{	614	{
		615	dTHX;
		616
541	/* coro_run is the alternative epilogue of transfer() */	617	/* coro_run is the alternative tail of transfer(), so unlock here. */
542	UNLOCK;	618	UNLOCK;
543		619
544	/*	620	/*
545	* this is a _very_ stripped down perl interpreter ;)	621	* this is a _very_ stripped down perl interpreter ;)
546	*/	622	*/
547	PL_top_env = &PL_start_env;	623	PL_top_env = &PL_start_env;
548		624
549	/* inject call to cctx_init */	625	/* inject call to cctx_init */
550	prepare_cctx ((coro_cctx *)arg);	626	prepare_cctx (aTHX_ (coro_cctx *)arg);
551		627
552	/* somebody will hit me for both perl_run and PL_restartop */	628	/* somebody will hit me for both perl_run and PL_restartop */
		629	PL_restartop = PL_op;
553	perl_run (PL_curinterp);	630	perl_run (PL_curinterp);
554		631
555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	632	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
556	abort ();	633	abort ();
557	}	634	}
558		635
559	static coro_cctx *	636	static coro_cctx *
560	cctx_new ()	637	cctx_new ()
561	{	638	{
562	coro_cctx *cctx;	639	coro_cctx *cctx;
		640	void *stack_start;
		641	size_t stack_size;
563		642
564	++cctx_count;	643	++cctx_count;
565		644
566	New (0, cctx, 1, coro_cctx);	645	Newz (0, cctx, 1, coro_cctx);
567		646
568	#if HAVE_MMAP	647	#if HAVE_MMAP
569		648
570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	649	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
571	/* mmap suppsedly does allocate-on-write for us */	650	/* mmap supposedly does allocate-on-write for us */
572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	651	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
573		652
574	if (cctx->sptr == (void *)-1)	653	if (cctx->sptr != (void *)-1)
575	{
576	perror ("FATAL: unable to mmap stack for coroutine");
577	_exit (EXIT_FAILURE);
578	}	654	{
579
580	# if STACKGUARD	655	# if CORO_STACKGUARD
581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	656	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
582	# endif	657	# endif
		658	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		659	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		660	cctx->mapped = 1;
		661	}
		662	else
		663	#endif
		664	{
		665	cctx->ssize = coro_stacksize * (long)sizeof (long);
		666	New (0, cctx->sptr, coro_stacksize, long);
583		667
584	#else
585
586	cctx->ssize = STACKSIZE * (long)sizeof (long);
587	New (0, cctx->sptr, STACKSIZE, long);
588
589	if (!cctx->sptr)	668	if (!cctx->sptr)
590	{	669	{
591	perror ("FATAL: unable to malloc stack for coroutine");	670	perror ("FATAL: unable to allocate stack for coroutine");
592	_exit (EXIT_FAILURE);	671	_exit (EXIT_FAILURE);
593	}	672	}
594		673
595	#endif	674	stack_start = cctx->sptr;
		675	stack_size = cctx->ssize;
		676	}
596		677
597	#if USE_VALGRIND	678	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
600	cctx->ssize + (char *)cctx->sptr
601	);
602	#endif
603
604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	679	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
605		680
606	return cctx;	681	return cctx;
607	}	682	}
608		683
609	static void	684	static void
610	cctx_free (coro_cctx *cctx)	685	cctx_destroy (coro_cctx *cctx)
611	{	686	{
612	if (!cctx)	687	if (!cctx)
613	return;	688	return;
614		689
615	--cctx_count;	690	--cctx_count;
616		691
617	#if USE_VALGRIND	692	#if CORO_USE_VALGRIND
618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	693	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619	#endif	694	#endif
620		695
621	#if HAVE_MMAP	696	#if HAVE_MMAP
		697	if (cctx->mapped)
622	munmap (cctx->sptr, cctx->ssize);	698	munmap (cctx->sptr, cctx->ssize);
623	#else	699	else
		700	#endif
624	Safefree (cctx->sptr);	701	Safefree (cctx->sptr);
625	#endif
626		702
627	Safefree (cctx);	703	Safefree (cctx);
628	}	704	}
629		705
630	static coro_cctx *	706	static coro_cctx *
631	cctx_get ()	707	cctx_get (pTHX)
632	{	708	{
633	coro_cctx *cctx;
634
635	if (cctx_first)	709	while (cctx_first)
636	{	710	{
		711	coro_cctx *cctx = cctx_first;
		712	cctx_first = cctx->next;
637	--cctx_idle;	713	--cctx_idle;
638	cctx = cctx_first;	714
639	cctx_first = cctx->next;	715	if (cctx->ssize >= coro_stacksize)
		716	return cctx;
		717
		718	cctx_destroy (cctx);
640	}	719	}
641	else	720
642	{
643	cctx = cctx_new ();
644	PL_op = PL_op->op_next;	721	PL_op = PL_op->op_next;
645	}
646
647	return cctx;	722	return cctx_new ();
648	}	723	}
649		724
650	static void	725	static void
651	cctx_put (coro_cctx *cctx)	726	cctx_put (coro_cctx *cctx)
652	{	727	{
		728	/* free another cctx if overlimit */
		729	if (cctx_idle >= MAX_IDLE_CCTX)
		730	{
		731	coro_cctx *first = cctx_first;
		732	cctx_first = first->next;
		733	--cctx_idle;
		734
		735	assert (!first->inuse);
		736	cctx_destroy (first);
		737	}
		738
653	++cctx_idle;	739	++cctx_idle;
654	cctx->next = cctx_first;	740	cctx->next = cctx_first;
655	cctx_first = cctx;	741	cctx_first = cctx;
656	}	742	}
657		743
		744	/** coroutine switching *****************************************************/
		745
658	/* never call directly, always through the coro_state_transfer global variable */	746	/* never call directly, always through the coro_state_transfer global variable */
659	static void NOINLINE	747	static void NOINLINE
660	transfer (struct coro *prev, struct coro *next, int flags)	748	transfer (pTHX_ struct coro *prev, struct coro *next)
661	{	749	{
662	dSTACKLEVEL;	750	dSTACKLEVEL;
663		751
664	/* sometimes transfer is only called to set idle_sp */	752	/* sometimes transfer is only called to set idle_sp */
665	if (flags == TRANSFER_SET_STACKLEVEL)	753	if (!next)
		754	{
666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	755	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		756	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		757	}
667	else if (prev != next)	758	else if (prev != next)
668	{	759	{
669	coro_cctx *prev__cctx;	760	coro_cctx *prev__cctx;
670		761
		762	if (prev->flags & CF_NEW)
		763	{
		764	/* create a new empty context */
		765	Newz (0, prev->cctx, 1, coro_cctx);
		766	prev->cctx->inuse = 1;
		767	prev->flags &= ~CF_NEW;
		768	prev->flags |= CF_RUNNING;
		769	}
		770
		771	/*TODO: must not croak here */
		772	if (!prev->flags & CF_RUNNING)
		773	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		774
		775	if (next->flags & CF_RUNNING)
		776	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		777
		778	if (next->flags & CF_DESTROYED)
		779	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		780
		781	prev->flags &= ~CF_RUNNING;
		782	next->flags |= CF_RUNNING;
		783
671	LOCK;	784	LOCK;
672		785
673	if (next->mainstack)	786	if (next->flags & CF_NEW)
674	{	787	{
675	/* coroutine already started */	788	/* need to start coroutine */
676	SAVE (prev, flags);	789	next->flags &= ~CF_NEW;
677	LOAD (next);	790	/* first get rid of the old state */
		791	save_perl (aTHX_ prev);
		792	/* setup coroutine call */
		793	setup_coro (aTHX_ next);
		794	/* need a new stack */
		795	assert (!next->cctx);
678	}	796	}
679	else	797	else
680	{	798	{
681	/* need to start coroutine */	799	/* coroutine already started */
682	/* first get rid of the old state */	800	save_perl (aTHX_ prev);
683	SAVE (prev, -1);	801	load_perl (aTHX_ next);
684	/* setup coroutine call */
685	setup_coro (next);
686	/* need a stack */
687	next->cctx = 0;
688	}	802	}
689
690	if (!prev->cctx)
691	/* create a new empty context */
692	Newz (0, prev->cctx, 1, coro_cctx);
693		803
694	prev__cctx = prev->cctx;	804	prev__cctx = prev->cctx;
695		805
696	/* possibly "free" the cctx */	806	/* possibly "free" the cctx */
697	if (prev__cctx->idle_sp == STACKLEVEL)	807	if (prev__cctx->idle_sp == STACKLEVEL)
698	{	808	{
		809	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		810	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		811
		812	prev->cctx = 0;
		813
699	cctx_put (prev__cctx);	814	cctx_put (prev__cctx);
700	prev->cctx = 0;	815	prev__cctx->inuse = 0;
701	}	816	}
702		817
703	if (!next->cctx)	818	if (!next->cctx)
		819	{
704	next->cctx = cctx_get ();	820	next->cctx = cctx_get (aTHX);
		821	assert (!next->cctx->inuse);
		822	next->cctx->inuse = 1;
		823	}
705		824
706	if (prev__cctx != next->cctx)	825	if (prev__cctx != next->cctx)
707	{	826	{
708	prev__cctx->top_env = PL_top_env;	827	prev__cctx->top_env = PL_top_env;
709	PL_top_env = next->cctx->top_env;	828	PL_top_env = next->cctx->top_env;
710	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	829	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
711	}	830	}
712		831
713	free_coro_mortal ();	832	free_coro_mortal (aTHX);
714
715	UNLOCK;	833	UNLOCK;
716	}	834	}
717	}	835	}
718		836
719	struct transfer_args	837	struct transfer_args
720	{	838	{
721	struct coro *prev, *next;	839	struct coro *prev, *next;
722	int flags;
723	};	840	};
724		841
725	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	842	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
726		843
		844	/** high level stuff ********************************************************/
		845
727	static void	846	static int
728	coro_state_destroy (struct coro *coro)	847	coro_state_destroy (pTHX_ struct coro *coro)
729	{	848	{
730	if (coro->refcnt--)	849	if (coro->flags & CF_DESTROYED)
731	return;	850	return 0;
		851
		852	coro->flags |= CF_DESTROYED;
		853
		854	if (coro->flags & CF_READY)
		855	{
		856	/* reduce nready, as destroying a ready coro effectively unreadies it */
		857	/* alternative: look through all ready queues and remove the coro */
		858	LOCK;
		859	--coro_nready;
		860	UNLOCK;
		861	}
		862	else
		863	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
732		864
733	if (coro->mainstack && coro->mainstack != main_mainstack)	865	if (coro->mainstack && coro->mainstack != main_mainstack)
734	{	866	{
735	struct coro temp;	867	struct coro temp;
736		868
737	SAVE ((&temp), TRANSFER_SAVE_ALL);	869	assert (!(coro->flags & CF_RUNNING));
738	LOAD (coro);
739		870
		871	Zero (&temp, 1, struct coro);
		872	temp.save = CORO_SAVE_DEF;
		873
		874	if (coro->flags & CF_RUNNING)
		875	croak ("FATAL: tried to destroy currently running coroutine");
		876
		877	save_perl (aTHX_ &temp);
		878	load_perl (aTHX_ coro);
		879
740	coro_destroy_stacks ();	880	coro_destroy_stacks (aTHX);
741		881
742	LOAD ((&temp)); /* this will get rid of defsv etc.. */	882	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
743		883
744	coro->mainstack = 0;	884	coro->mainstack = 0;
745	}	885	}
746		886
747	cctx_free (coro->cctx);	887	cctx_destroy (coro->cctx);
748	SvREFCNT_dec (coro->args);	888	SvREFCNT_dec (coro->args);
749	Safefree (coro);	889
		890	return 1;
750	}	891	}
751		892
752	static int	893	static int
753	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	894	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
754	{	895	{
755	struct coro *coro = (struct coro *)mg->mg_ptr;	896	struct coro *coro = (struct coro *)mg->mg_ptr;
756	mg->mg_ptr = 0;	897	mg->mg_ptr = 0;
757		898
		899	if (--coro->refcnt < 0)
		900	{
758	coro_state_destroy (coro);	901	coro_state_destroy (aTHX_ coro);
		902	Safefree (coro);
		903	}
759		904
760	return 0;	905	return 0;
761	}	906	}
762		907
763	static int	908	static int
…		…
770	return 0;	915	return 0;
771	}	916	}
772		917
773	static MGVTBL coro_state_vtbl = {	918	static MGVTBL coro_state_vtbl = {
774	0, 0, 0, 0,	919	0, 0, 0, 0,
775	coro_state_clear,	920	coro_state_free,
776	0,	921	0,
777	#ifdef MGf_DUP	922	#ifdef MGf_DUP
778	coro_state_dup,	923	coro_state_dup,
779	#else	924	#else
780	# define MGf_DUP 0	925	# define MGf_DUP 0
781	#endif	926	#endif
782	};	927	};
783		928
784	static struct coro *	929	static struct coro *
785	SvSTATE (SV *coro)	930	SvSTATE_ (pTHX_ SV *coro)
786	{	931	{
787	HV *stash;	932	HV *stash;
788	MAGIC *mg;	933	MAGIC *mg;
789		934
790	if (SvROK (coro))	935	if (SvROK (coro))
…		…
796	/* very slow, but rare, check */	941	/* very slow, but rare, check */
797	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	942	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
798	croak ("Coro::State object required");	943	croak ("Coro::State object required");
799	}	944	}
800		945
801	mg = SvMAGIC (coro);	946	mg = CORO_MAGIC (coro);
802	assert (mg->mg_type == PERL_MAGIC_ext);
803	return (struct coro *)mg->mg_ptr;	947	return (struct coro *)mg->mg_ptr;
804	}	948	}
805		949
		950	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		951
806	static void	952	static void
807	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	953	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
808	{	954	{
809	ta->prev = SvSTATE (prev);	955	ta->prev = SvSTATE (prev_sv);
810	ta->next = SvSTATE (next);	956	ta->next = SvSTATE (next_sv);
811	ta->flags = flags;
812	}	957	}
813		958
814	static void	959	static void
815	api_transfer (SV *prev, SV *next, int flags)	960	api_transfer (SV *prev_sv, SV *next_sv)
816	{	961	{
817	dTHX;	962	dTHX;
818	struct transfer_args ta;	963	struct transfer_args ta;
819		964
820	prepare_transfer (&ta, prev, next, flags);	965	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
821	TRANSFER (ta);	966	TRANSFER (ta);
822	}	967	}
823		968
		969	static int
		970	api_save (SV *coro_sv, int new_save)
		971	{
		972	dTHX;
		973	struct coro *coro = SvSTATE (coro_sv);
		974	int old_save = coro->save;
		975
		976	if (new_save >= 0)
		977	coro->save = new_save;
		978
		979	return old_save;
		980	}
		981
824	/** Coro ********************************************************************/	982	/** Coro ********************************************************************/
825		983
826	#define PRIO_MAX 3
827	#define PRIO_HIGH 1
828	#define PRIO_NORMAL 0
829	#define PRIO_LOW -1
830	#define PRIO_IDLE -3
831	#define PRIO_MIN -4
832
833	/* for Coro.pm */
834	static GV *coro_current, *coro_idle;
835	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
836	static int coro_nready;
837
838	static void	984	static void
839	coro_enq (SV *sv)	985	coro_enq (pTHX_ SV *coro_sv)
840	{	986	{
841	int prio;
842
843	if (SvTYPE (sv) != SVt_PVHV)
844	croak ("Coro::ready tried to enqueue something that is not a coroutine");
845
846	prio = SvSTATE (sv)->prio;
847
848	av_push (coro_ready [prio - PRIO_MIN], sv);	987	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
849	coro_nready++;
850	}	988	}
851		989
852	static SV *	990	static SV *
853	coro_deq (int min_prio)	991	coro_deq (pTHX_ int min_prio)
854	{	992	{
855	int prio = PRIO_MAX - PRIO_MIN;	993	int prio = PRIO_MAX - PRIO_MIN;
856		994
857	min_prio -= PRIO_MIN;	995	min_prio -= PRIO_MIN;
858	if (min_prio < 0)	996	if (min_prio < 0)
859	min_prio = 0;	997	min_prio = 0;
860		998
861	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	999	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
862	if (AvFILLp (coro_ready [prio]) >= 0)	1000	if (AvFILLp (coro_ready [prio]) >= 0)
863	{
864	coro_nready--;
865	return av_shift (coro_ready [prio]);	1001	return av_shift (coro_ready [prio]);
866	}
867		1002
868	return 0;	1003	return 0;
869	}	1004	}
870		1005
871	static void	1006	static int
872	api_ready (SV *coro)	1007	api_ready (SV *coro_sv)
873	{	1008	{
874	dTHX;	1009	dTHX;
		1010	struct coro *coro;
875		1011
876	if (SvROK (coro))	1012	if (SvROK (coro_sv))
877	coro = SvRV (coro);	1013	coro_sv = SvRV (coro_sv);
		1014
		1015	coro = SvSTATE (coro_sv);
		1016
		1017	if (coro->flags & CF_READY)
		1018	return 0;
		1019
		1020	coro->flags |= CF_READY;
878		1021
879	LOCK;	1022	LOCK;
880	coro_enq (SvREFCNT_inc (coro));	1023	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1024	++coro_nready;
881	UNLOCK;	1025	UNLOCK;
882	}
883		1026
		1027	return 1;
		1028	}
		1029
884	static void	1030	static int
		1031	api_is_ready (SV *coro_sv)
		1032	{
		1033	dTHX;
		1034	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1035	}
		1036
		1037	static void
885	prepare_schedule (struct transfer_args *ta)	1038	prepare_schedule (pTHX_ struct transfer_args *ta)
886	{	1039	{
887	SV *current, *prev, *next;	1040	SV *prev_sv, *next_sv;
888
889	current = GvSV (coro_current);
890		1041
891	for (;;)	1042	for (;;)
892	{	1043	{
893	LOCK;	1044	LOCK;
894	next = coro_deq (PRIO_MIN);	1045	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1046
		1047	/* nothing to schedule: call the idle handler */
		1048	if (!next_sv)
		1049	{
		1050	dSP;
		1051	UNLOCK;
		1052
		1053	ENTER;
		1054	SAVETMPS;
		1055
		1056	PUSHMARK (SP);
		1057	PUTBACK;
		1058	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1059
		1060	FREETMPS;
		1061	LEAVE;
		1062	continue;
		1063	}
		1064
		1065	ta->next = SvSTATE (next_sv);
		1066
		1067	/* cannot transfer to destroyed coros, skip and look for next */
		1068	if (ta->next->flags & CF_DESTROYED)
		1069	{
		1070	UNLOCK;
		1071	SvREFCNT_dec (next_sv);
		1072	/* coro_nready is already taken care of by destroy */
		1073	continue;
		1074	}
		1075
		1076	--coro_nready;
895	UNLOCK;	1077	UNLOCK;
896
897	if (next)
898	break;	1078	break;
899
900	{
901	dSP;
902
903	ENTER;
904	SAVETMPS;
905
906	PUSHMARK (SP);
907	PUTBACK;
908	call_sv (GvSV (coro_idle), G_DISCARD);
909
910	FREETMPS;
911	LEAVE;
912	}	1079	}
913	}
914
915	prev = SvRV (current);
916	SvRV (current) = next;
917		1080
918	/* free this only after the transfer */	1081	/* free this only after the transfer */
		1082	prev_sv = SvRV (coro_current);
		1083	SvRV_set (coro_current, next_sv);
		1084	ta->prev = SvSTATE (prev_sv);
		1085
		1086	assert (ta->next->flags & CF_READY);
		1087	ta->next->flags &= ~CF_READY;
		1088
919	LOCK;	1089	LOCK;
920	free_coro_mortal ();	1090	free_coro_mortal (aTHX);
		1091	coro_mortal = prev_sv;
921	UNLOCK;	1092	UNLOCK;
922	coro_mortal = prev;
923
924	ta->prev = SvSTATE (prev);
925	ta->next = SvSTATE (next);
926	ta->flags = TRANSFER_SAVE_ALL;
927	}	1093	}
928		1094
929	static void	1095	static void
930	prepare_cede (struct transfer_args *ta)	1096	prepare_cede (pTHX_ struct transfer_args *ta)
931	{	1097	{
932	LOCK;	1098	api_ready (coro_current);
933	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
934	UNLOCK;
935
936	prepare_schedule (ta);	1099	prepare_schedule (aTHX_ ta);
		1100	}
		1101
		1102	static int
		1103	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1104	{
		1105	if (coro_nready)
		1106	{
		1107	SV *prev = SvRV (coro_current);
		1108	prepare_schedule (aTHX_ ta);
		1109	api_ready (prev);
		1110	return 1;
		1111	}
		1112	else
		1113	return 0;
937	}	1114	}
938		1115
939	static void	1116	static void
940	api_schedule (void)	1117	api_schedule (void)
941	{	1118	{
942	dTHX;	1119	dTHX;
943	struct transfer_args ta;	1120	struct transfer_args ta;
944		1121
945	prepare_schedule (&ta);	1122	prepare_schedule (aTHX_ &ta);
946	TRANSFER (ta);	1123	TRANSFER (ta);
947	}	1124	}
948		1125
949	static void	1126	static int
950	api_cede (void)	1127	api_cede (void)
951	{	1128	{
952	dTHX;	1129	dTHX;
953	struct transfer_args ta;	1130	struct transfer_args ta;
954		1131
955	prepare_cede (&ta);	1132	prepare_cede (aTHX_ &ta);
		1133
		1134	if (ta.prev != ta.next)
		1135	{
956	TRANSFER (ta);	1136	TRANSFER (ta);
		1137	return 1;
		1138	}
		1139	else
		1140	return 0;
		1141	}
		1142
		1143	static int
		1144	api_cede_notself (void)
		1145	{
		1146	dTHX;
		1147	struct transfer_args ta;
		1148
		1149	if (prepare_cede_notself (aTHX_ &ta))
		1150	{
		1151	TRANSFER (ta);
		1152	return 1;
		1153	}
		1154	else
		1155	return 0;
957	}	1156	}
958		1157
959	MODULE = Coro::State PACKAGE = Coro::State	1158	MODULE = Coro::State PACKAGE = Coro::State
960		1159
961	PROTOTYPES: DISABLE	1160	PROTOTYPES: DISABLE
…		…
967	#endif	1166	#endif
968	BOOT_PAGESIZE;	1167	BOOT_PAGESIZE;
969		1168
970	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1169	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971		1170
972	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1171	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
973	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1172	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
974	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1173	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1174	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1175	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1176	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1177	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
975		1178
976	main_mainstack = PL_mainstack;	1179	main_mainstack = PL_mainstack;
977		1180
978	coroapi.ver = CORO_API_VERSION;	1181	coroapi.ver = CORO_API_VERSION;
979	coroapi.transfer = api_transfer;	1182	coroapi.transfer = api_transfer;
…		…
989	HV *hv;	1192	HV *hv;
990	int i;	1193	int i;
991		1194
992	Newz (0, coro, 1, struct coro);	1195	Newz (0, coro, 1, struct coro);
993	coro->args = newAV ();	1196	coro->args = newAV ();
		1197	coro->save = CORO_SAVE_DEF;
		1198	coro->flags = CF_NEW;
994		1199
995	hv = newHV ();	1200	hv = newHV ();
996	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1201	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
997	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1202	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
998		1203
999	for (i = 1; i < items; i++)	1204	for (i = 1; i < items; i++)
1000	av_push (coro->args, newSVsv (ST (i)));	1205	av_push (coro->args, newSVsv (ST (i)));
1001	}	1206	}
1002	OUTPUT:	1207	OUTPUT:
		1208	RETVAL
		1209
		1210	int
		1211	save (SV *coro, int new_save = -1)
		1212	CODE:
		1213	RETVAL = api_save (coro, new_save);
		1214	OUTPUT:
		1215	RETVAL
		1216
		1217	int
		1218	save_also (SV *coro_sv, int save_also)
		1219	CODE:
		1220	{
		1221	struct coro *coro = SvSTATE (coro_sv);
		1222	RETVAL = coro->save;
		1223	coro->save |= save_also;
		1224	}
		1225	OUTPUT:
1003	RETVAL	1226	RETVAL
1004		1227
1005	void	1228	void
1006	_set_stacklevel (...)	1229	_set_stacklevel (...)
1007	ALIAS:	1230	ALIAS:
1008	Coro::State::transfer = 1	1231	Coro::State::transfer = 1
1009	Coro::schedule = 2	1232	Coro::schedule = 2
1010	Coro::cede = 3	1233	Coro::cede = 3
1011	Coro::Cont::yield = 4	1234	Coro::cede_notself = 4
1012	CODE:	1235	CODE:
1013	{	1236	{
1014	struct transfer_args ta;	1237	struct transfer_args ta;
1015		1238
1016	switch (ix)	1239	switch (ix)
1017	{	1240	{
1018	case 0:	1241	case 0:
1019	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1242	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1020	ta.next = 0;	1243	ta.next = 0;
1021	ta.flags = TRANSFER_SET_STACKLEVEL;
1022	break;	1244	break;
1023		1245
1024	case 1:	1246	case 1:
1025	if (items != 3)	1247	if (items != 2)
1026	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1248	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1027		1249
1028	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1250	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1029	break;	1251	break;
1030		1252
1031	case 2:	1253	case 2:
1032	prepare_schedule (&ta);	1254	prepare_schedule (aTHX_ &ta);
1033	break;	1255	break;
1034		1256
1035	case 3:	1257	case 3:
1036	prepare_cede (&ta);	1258	prepare_cede (aTHX_ &ta);
1037	break;	1259	break;
1038		1260
1039	case 4:	1261	case 4:
1040	{	1262	if (!prepare_cede_notself (aTHX_ &ta))
1041	SV *yieldstack;	1263	XSRETURN_EMPTY;
1042	SV *sv;
1043	AV *defav = GvAV (PL_defgv);
1044		1264
1045	yieldstack = *hv_fetch (
1046	(HV *)SvRV (GvSV (coro_current)),
1047	"yieldstack", sizeof ("yieldstack") - 1,
1048	0
1049	);
1050
1051	/* set up @_ -- ugly */
1052	av_clear (defav);
1053	av_fill (defav, items - 1);
1054	while (items--)
1055	av_store (defav, items, SvREFCNT_inc (ST(items)));
1056
1057	sv = av_pop ((AV *)SvRV (yieldstack));
1058	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1059	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1060	ta.flags = 0;
1061	SvREFCNT_dec (sv);
1062	}
1063	break;	1265	break;
1064
1065	}	1266	}
1066		1267
		1268	BARRIER;
1067	TRANSFER (ta);	1269	TRANSFER (ta);
1068	}
1069		1270
1070	void	1271	if (GIMME_V != G_VOID && ta.next != ta.prev)
1071	_clone_state_from (SV *dst, SV *src)	1272	XSRETURN_YES;
		1273	}
		1274
		1275	bool
		1276	_destroy (SV *coro_sv)
1072	CODE:	1277	CODE:
1073	{	1278	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1074	struct coro *coro_src = SvSTATE (src);	1279	OUTPUT:
1075		1280	RETVAL
1076	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1077
1078	++coro_src->refcnt;
1079	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1080	}
1081		1281
1082	void	1282	void
1083	_exit (code)	1283	_exit (code)
1084	int code	1284	int code
1085	PROTOTYPE: $	1285	PROTOTYPE: $
1086	CODE:	1286	CODE:
1087	_exit (code);	1287	_exit (code);
1088		1288
1089	int	1289	int
		1290	cctx_stacksize (int new_stacksize = 0)
		1291	CODE:
		1292	RETVAL = coro_stacksize;
		1293	if (new_stacksize)
		1294	coro_stacksize = new_stacksize;
		1295	OUTPUT:
		1296	RETVAL
		1297
		1298	int
1090	cctx_count ()	1299	cctx_count ()
1091	CODE:	1300	CODE:
1092	RETVAL = cctx_count;	1301	RETVAL = cctx_count;
1093	OUTPUT:	1302	OUTPUT:
1094	RETVAL	1303	RETVAL
…		…
1113	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1322	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1114	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1323	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1115	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1324	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1116	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1325	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1117		1326
1118	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1327	coro_current = get_sv ("Coro::current", FALSE);
1119	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1328	SvREADONLY_on (coro_current);
1120		1329
1121	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1330	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1122	coro_ready[i] = newAV ();	1331	coro_ready[i] = newAV ();
1123		1332
1124	{	1333	{
1125	SV *sv = perl_get_sv("Coro::API", 1);	1334	SV *sv = perl_get_sv("Coro::API", 1);
1126		1335
1127	coroapi.schedule = api_schedule;	1336	coroapi.schedule = api_schedule;
		1337	coroapi.save = api_save;
1128	coroapi.cede = api_cede;	1338	coroapi.cede = api_cede;
		1339	coroapi.cede_notself = api_cede_notself;
1129	coroapi.ready = api_ready;	1340	coroapi.ready = api_ready;
		1341	coroapi.is_ready = api_is_ready;
1130	coroapi.nready = &coro_nready;	1342	coroapi.nready = &coro_nready;
1131	coroapi.current = coro_current;	1343	coroapi.current = coro_current;
1132		1344
1133	GCoroAPI = &coroapi;	1345	GCoroAPI = &coroapi;
1134	sv_setiv (sv, (IV)&coroapi);	1346	sv_setiv (sv, (IV)&coroapi);
1135	SvREADONLY_on (sv);	1347	SvREADONLY_on (sv);
1136	}	1348	}
1137	}	1349	}
		1350
		1351	void
		1352	_set_current (SV *current)
		1353	PROTOTYPE: $
		1354	CODE:
		1355	SvREFCNT_dec (SvRV (coro_current));
		1356	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1138		1357
1139	int	1358	int
1140	prio (Coro::State coro, int newprio = 0)	1359	prio (Coro::State coro, int newprio = 0)
1141	ALIAS:	1360	ALIAS:
1142	nice = 1	1361	nice = 1
…		…
1145	RETVAL = coro->prio;	1364	RETVAL = coro->prio;
1146		1365
1147	if (items > 1)	1366	if (items > 1)
1148	{	1367	{
1149	if (ix)	1368	if (ix)
1150	newprio += coro->prio;	1369	newprio = coro->prio - newprio;
1151		1370
1152	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1371	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1153	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1372	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1154		1373
1155	coro->prio = newprio;	1374	coro->prio = newprio;
1156	}	1375	}
1157	}	1376	}
		1377	OUTPUT:
		1378	RETVAL
1158		1379
1159	void	1380	SV *
1160	ready (SV *self)	1381	ready (SV *self)
1161	PROTOTYPE: $	1382	PROTOTYPE: $
1162	CODE:	1383	CODE:
1163	api_ready (self);	1384	RETVAL = boolSV (api_ready (self));
		1385	OUTPUT:
		1386	RETVAL
		1387
		1388	SV *
		1389	is_ready (SV *self)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	RETVAL = boolSV (api_is_ready (self));
		1393	OUTPUT:
		1394	RETVAL
1164		1395
1165	int	1396	int
1166	nready (...)	1397	nready (...)
1167	PROTOTYPE:	1398	PROTOTYPE:
1168	CODE:	1399	CODE:
…		…
1174		1405
1175	SV *	1406	SV *
1176	_get_state ()	1407	_get_state ()
1177	CODE:	1408	CODE:
1178	{	1409	{
1179	struct {	1410	struct io_state *data;
1180	int errorno;
1181	int laststype;
1182	int laststatval;
1183	Stat_t statcache;
1184	} data;
1185		1411
		1412	RETVAL = newSV (sizeof (struct io_state));
		1413	data = (struct io_state *)SvPVX (RETVAL);
		1414	SvCUR_set (RETVAL, sizeof (struct io_state));
		1415	SvPOK_only (RETVAL);
		1416
1186	data.errorno = errno;	1417	data->errorno = errno;
1187	data.laststype = PL_laststype;	1418	data->laststype = PL_laststype;
1188	data.laststatval = PL_laststatval;	1419	data->laststatval = PL_laststatval;
1189	data.statcache = PL_statcache;	1420	data->statcache = PL_statcache;
1190
1191	RETVAL = newSVpvn ((char *)&data, sizeof data);
1192	}	1421	}
1193	OUTPUT:	1422	OUTPUT:
1194	RETVAL	1423	RETVAL
1195		1424
1196	void	1425	void
1197	_set_state (char *data_)	1426	_set_state (char *data_)
1198	PROTOTYPE: $	1427	PROTOTYPE: $
1199	CODE:	1428	CODE:
1200	{	1429	{
1201	struct {	1430	struct io_state *data = (void *)data_;
1202	int errorno;
1203	int laststype;
1204	int laststatval;
1205	Stat_t statcache;
1206	} *data = (void *)data_;
1207		1431
1208	errno = data->errorno;	1432	errno = data->errorno;
1209	PL_laststype = data->laststype;	1433	PL_laststype = data->laststype;
1210	PL_laststatval = data->laststatval;	1434	PL_laststatval = data->laststatval;
1211	PL_statcache = data->statcache;	1435	PL_statcache = data->statcache;
1212	}	1436	}
		1437

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