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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC vs.
Revision 1.149 by root, Sat Apr 14 15:06:05 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 */
		134	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
107		137
108	static struct coro_cctx *cctx_first;	138	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	139	static int cctx_count, cctx_idle;
…		…
112	typedef struct coro_cctx {	142	typedef struct coro_cctx {
113	struct coro_cctx *next;	143	struct coro_cctx *next;
114		144
115	/* the stack */	145	/* the stack */
116	void *sptr;	146	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
118		148
119	/* cpu state */	149	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	152	JMPENV *top_env;
122	coro_context cctx;	153	coro_context cctx;
123		154
124	#if USE_VALGRIND	155	#if CORO_USE_VALGRIND
125	int valgrind_id;	156	int valgrind_id;
126	#endif	157	#endif
		158	char inuse, mapped;
127	} coro_cctx;	159	} coro_cctx;
		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
128		167
129	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
130	struct coro {	169	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	171	coro_cctx *cctx;
133		172
134	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
135	AV *args;	174	AV *args;
136	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
137		178
138	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
139	AV *defav;	180	AV *defav; /* @_ */
140	SV *defsv;	181	SV *defsv; /* $_ */
141	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
142		186
143	#define VAR(name,type) type name;	187	#define VAR(name,type) type name;
144	# include "state.h"	188	# include "state.h"
145	#undef VAR	189	#undef VAR
146		190
…		…
149	};	193	};
150		194
151	typedef struct coro *Coro__State;	195	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	196	typedef struct coro *Coro__State_or_hashref;
153		197
		198	/** Coro ********************************************************************/
		199
		200	#define PRIO_MAX 3
		201	#define PRIO_HIGH 1
		202	#define PRIO_NORMAL 0
		203	#define PRIO_LOW -1
		204	#define PRIO_IDLE -3
		205	#define PRIO_MIN -4
		206
		207	/* for Coro.pm */
		208	static SV *coro_current;
		209	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		210	static int coro_nready;
		211
		212	/** lowlevel stuff **********************************************************/
		213
154	static AV *	214	static AV *
155	coro_clone_padlist (CV *cv)	215	coro_clone_padlist (pTHX_ CV *cv)
156	{	216	{
157	AV *padlist = CvPADLIST (cv);	217	AV *padlist = CvPADLIST (cv);
158	AV *newpadlist, *newpad;	218	AV *newpadlist, *newpad;
159		219
160	newpadlist = newAV ();	220	newpadlist = newAV ();
…		…
172		232
173	return newpadlist;	233	return newpadlist;
174	}	234	}
175		235
176	static void	236	static void
177	free_padlist (AV *padlist)	237	free_padlist (pTHX_ AV *padlist)
178	{	238	{
179	/* may be during global destruction */	239	/* may be during global destruction */
180	if (SvREFCNT (padlist))	240	if (SvREFCNT (padlist))
181	{	241	{
182	I32 i = AvFILLp (padlist);	242	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	263	AV *padlist;
204	AV *av = (AV *)mg->mg_obj;	264	AV *av = (AV *)mg->mg_obj;
205		265
206	/* casting is fun. */	266	/* casting is fun. */
207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208	free_padlist (padlist);	268	free_padlist (aTHX_ padlist);
209		269
210	SvREFCNT_dec (av);	270	SvREFCNT_dec (av);
211		271
212	return 0;	272	return 0;
213	}	273	}
…		…
223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	283	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
224	: 0	284	: 0
225		285
226	/* the next two functions merely cache the padlists */	286	/* the next two functions merely cache the padlists */
227	static void	287	static void
228	get_padlist (CV *cv)	288	get_padlist (pTHX_ CV *cv)
229	{	289	{
230	MAGIC *mg = CORO_MAGIC (cv);	290	MAGIC *mg = CORO_MAGIC (cv);
231	AV *av;	291	AV *av;
232		292
233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	293	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	294	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	295	else
236	{	296	{
237	#if 0	297	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this is probably cleaner, but also slower? */	298	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (cv);	299	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	300	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	301	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	302	SvREFCNT_dec (cp);
243	#else	303	#else
244	CvPADLIST (cv) = coro_clone_padlist (cv);	304	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
245	#endif	305	#endif
246	}	306	}
247	}	307	}
248		308
249	static void	309	static void
250	put_padlist (CV *cv)	310	put_padlist (pTHX_ CV *cv)
251	{	311	{
252	MAGIC *mg = CORO_MAGIC (cv);	312	MAGIC *mg = CORO_MAGIC (cv);
253	AV *av;	313	AV *av;
254		314
255	if (!mg)	315	if (!mg)
…		…
266	av_extend (av, AvMAX (av) + 1);	326	av_extend (av, AvMAX (av) + 1);
267		327
268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	328	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	329	}
270		330
		331	/** load & save, init *******************************************************/
		332
271	#define SB do {	333	#define SB do {
272	#define SE } while (0)	334	#define SE } while (0)
273		335
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	336	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
278		337
279	static void	338	static void
280	load_state(Coro__State c)	339	load_perl (pTHX_ Coro__State c)
281	{	340	{
282	#define VAR(name,type) PL_ ## name = c->name;	341	#define VAR(name,type) PL_ ## name = c->name;
283	# include "state.h"	342	# include "state.h"
284	#undef VAR	343	#undef VAR
285		344
286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	345	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	346	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	347	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		348	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		349
		350	if (c->irssv)
		351	{
		352	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		353	{
		354	SvREFCNT_dec (c->irssv);
		355	c->irssv = 0;
		356	}
		357	else
		358	{
		359	REPLACE_SV (PL_rs, c->irssv);
		360	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		361	sv_setsv (c->irssv_sv, PL_rs);
		362	}
		363	}
289		364
290	{	365	{
291	dSP;	366	dSP;
292	CV *cv;	367	CV *cv;
293		368
294	/* now do the ugly restore mess */	369	/* now do the ugly restore mess */
295	while ((cv = (CV *)POPs))	370	while ((cv = (CV *)POPs))
296	{	371	{
297	put_padlist (cv); /* mark this padlist as available */	372	put_padlist (aTHX_ cv); /* mark this padlist as available */
298	CvDEPTH (cv) = PTR2IV (POPs);	373	CvDEPTH (cv) = PTR2IV (POPs);
299	CvPADLIST (cv) = (AV *)POPs;	374	CvPADLIST (cv) = (AV *)POPs;
300	}	375	}
301		376
302	PUTBACK;	377	PUTBACK;
303	}	378	}
		379	assert (!PL_comppad || AvARRAY (PL_comppad));//D
304	}	380	}
305		381
306	static void	382	static void
307	save_state(Coro__State c, int flags)	383	save_perl (pTHX_ Coro__State c)
308	{	384	{
		385	assert (!PL_comppad || AvARRAY (PL_comppad));//D
309	{	386	{
310	dSP;	387	dSP;
311	I32 cxix = cxstack_ix;	388	I32 cxix = cxstack_ix;
312	PERL_CONTEXT *ccstk = cxstack;	389	PERL_CONTEXT *ccstk = cxstack;
313	PERL_SI *top_si = PL_curstackinfo;	390	PERL_SI *top_si = PL_curstackinfo;
…		…
315	/*	392	/*
316	* the worst thing you can imagine happens first - we have to save	393	* the worst thing you can imagine happens first - we have to save
317	* (and reinitialize) all cv's in the whole callchain :(	394	* (and reinitialize) all cv's in the whole callchain :(
318	*/	395	*/
319		396
		397	EXTEND (SP, 3 + 1);
320	PUSHs (Nullsv);	398	PUSHs (Nullsv);
321	/* this loop was inspired by pp_caller */	399	/* this loop was inspired by pp_caller */
322	for (;;)	400	for (;;)
323	{	401	{
324	while (cxix >= 0)	402	while (cxix >= 0)
325	{	403	{
326	PERL_CONTEXT *cx = &ccstk[cxix--];	404	PERL_CONTEXT *cx = &ccstk[cxix--];
327		405
328	if (CxTYPE(cx) == CXt_SUB)	406	if (CxTYPE (cx) == CXt_SUB)
329	{	407	{
330	CV *cv = cx->blk_sub.cv;	408	CV *cv = cx->blk_sub.cv;
331		409
332	if (CvDEPTH (cv))	410	if (CvDEPTH (cv))
333	{	411	{
334	EXTEND (SP, 3);	412	EXTEND (SP, 3);
335
336	PUSHs ((SV *)CvPADLIST(cv));	413	PUSHs ((SV *)CvPADLIST (cv));
337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	414	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
338	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
339		416
340	CvDEPTH (cv) = 0;	417	CvDEPTH (cv) = 0;
341	get_padlist (cv);	418	get_padlist (aTHX_ cv);
342	}	419	}
343	}	420	}
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	}	421	}
353		422
354	if (top_si->si_type == PERLSI_MAIN)	423	if (top_si->si_type == PERLSI_MAIN)
355	break;	424	break;
356		425
…		…
360	}	429	}
361		430
362	PUTBACK;	431	PUTBACK;
363	}	432	}
364		433
365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	434	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;	435	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	436	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		437	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		438	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
368		439
369	#define VAR(name,type)c->name = PL_ ## name;	440	#define VAR(name,type)c->name = PL_ ## name;
370	# include "state.h"	441	# include "state.h"
371	#undef VAR	442	#undef VAR
372	}	443	}
…		…
375	* allocate various perl stacks. This is an exact copy	446	* allocate various perl stacks. This is an exact copy
376	* of perl.c:init_stacks, except that it uses less memory	447	* of perl.c:init_stacks, except that it uses less memory
377	* on the (sometimes correct) assumption that coroutines do	448	* on the (sometimes correct) assumption that coroutines do
378	* not usually need a lot of stackspace.	449	* not usually need a lot of stackspace.
379	*/	450	*/
		451	#if CORO_PREFER_PERL_FUNCTIONS
		452	# define coro_init_stacks init_stacks
		453	#else
380	static void	454	static void
381	coro_init_stacks ()	455	coro_init_stacks (pTHX)
382	{	456	{
383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	457	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
384	PL_curstackinfo->si_type = PERLSI_MAIN;	458	PL_curstackinfo->si_type = PERLSI_MAIN;
385	PL_curstack = PL_curstackinfo->si_stack;	459	PL_curstack = PL_curstackinfo->si_stack;
386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	460	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
387		461
388	PL_stack_base = AvARRAY(PL_curstack);	462	PL_stack_base = AvARRAY(PL_curstack);
389	PL_stack_sp = PL_stack_base;	463	PL_stack_sp = PL_stack_base;
390	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	464	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
391		465
392	New(50,PL_tmps_stack,96,SV*);	466	New(50,PL_tmps_stack,128,SV*);
393	PL_tmps_floor = -1;	467	PL_tmps_floor = -1;
394	PL_tmps_ix = -1;	468	PL_tmps_ix = -1;
395	PL_tmps_max = 96;	469	PL_tmps_max = 128;
396		470
397	New(54,PL_markstack,16,I32);	471	New(54,PL_markstack,32,I32);
398	PL_markstack_ptr = PL_markstack;	472	PL_markstack_ptr = PL_markstack;
399	PL_markstack_max = PL_markstack + 16;	473	PL_markstack_max = PL_markstack + 32;
400		474
401	#ifdef SET_MARK_OFFSET	475	#ifdef SET_MARK_OFFSET
402	SET_MARK_OFFSET;	476	SET_MARK_OFFSET;
403	#endif	477	#endif
404		478
405	New(54,PL_scopestack,16,I32);	479	New(54,PL_scopestack,32,I32);
406	PL_scopestack_ix = 0;	480	PL_scopestack_ix = 0;
407	PL_scopestack_max = 16;	481	PL_scopestack_max = 32;
408		482
409	New(54,PL_savestack,96,ANY);	483	New(54,PL_savestack,64,ANY);
410	PL_savestack_ix = 0;	484	PL_savestack_ix = 0;
411	PL_savestack_max = 96;	485	PL_savestack_max = 64;
412		486
413	#if !PERL_VERSION_ATLEAST (5,9,0)	487	#if !PERL_VERSION_ATLEAST (5,9,0)
414	New(54,PL_retstack,8,OP*);	488	New(54,PL_retstack,16,OP*);
415	PL_retstack_ix = 0;	489	PL_retstack_ix = 0;
416	PL_retstack_max = 8;	490	PL_retstack_max = 16;
417	#endif	491	#endif
418	}	492	}
		493	#endif
419		494
420	/*	495	/*
421	* destroy the stacks, the callchain etc...	496	* destroy the stacks, the callchain etc...
422	*/	497	*/
423	static void	498	static void
424	coro_destroy_stacks ()	499	coro_destroy_stacks (pTHX)
425	{	500	{
426	if (!IN_DESTRUCT)	501	if (!IN_DESTRUCT)
427	{	502	{
428	/* is this ugly, I ask? */	503	/* restore all saved variables and stuff */
429	LEAVE_SCOPE (0);	504	LEAVE_SCOPE (0);
		505	assert (PL_tmps_floor == -1);
430		506
431	/* sure it is, but more important: is it correct?? :/ */	507	/* free all temporaries */
432	FREETMPS;	508	FREETMPS;
		509	assert (PL_tmps_ix == -1);
433		510
		511	/* unwind all extra stacks */
434	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	512	POPSTACK_TO (PL_mainstack);
		513
		514	/* unwind main stack */
		515	dounwind (-1);
435	}	516	}
436		517
437	while (PL_curstackinfo->si_next)	518	while (PL_curstackinfo->si_next)
438	PL_curstackinfo = PL_curstackinfo->si_next;	519	PL_curstackinfo = PL_curstackinfo->si_next;
439		520
440	while (PL_curstackinfo)	521	while (PL_curstackinfo)
441	{	522	{
442	PERL_SI *p = PL_curstackinfo->si_prev;	523	PERL_SI *p = PL_curstackinfo->si_prev;
443		524
444	{ /*D*//*remove*/
445	dSP;
446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
447	PUTBACK; /* possibly superfluous */
448	}
449
450	if (!IN_DESTRUCT)	525	if (!IN_DESTRUCT)
451	{
452	dounwind (-1);/*D*//*remove*/
453	SvREFCNT_dec (PL_curstackinfo->si_stack);	526	SvREFCNT_dec (PL_curstackinfo->si_stack);
454	}
455		527
456	Safefree (PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
457	Safefree (PL_curstackinfo);	529	Safefree (PL_curstackinfo);
458	PL_curstackinfo = p;	530	PL_curstackinfo = p;
459	}	531	}
…		…
465	#if !PERL_VERSION_ATLEAST (5,9,0)	537	#if !PERL_VERSION_ATLEAST (5,9,0)
466	Safefree (PL_retstack);	538	Safefree (PL_retstack);
467	#endif	539	#endif
468	}	540	}
469		541
		542	/** coroutine stack handling ************************************************/
		543
470	static void	544	static void
471	setup_coro (struct coro *coro)	545	setup_coro (pTHX_ struct coro *coro)
472	{	546	{
473	/*	547	/*
474	* emulate part of the perl startup here.	548	* emulate part of the perl startup here.
475	*/	549	*/
476
477	coro_init_stacks ();	550	coro_init_stacks (aTHX);
478		551
		552	PL_curcop = &PL_compiling;
		553	PL_in_eval = EVAL_NULL;
479	PL_curcop = 0;	554	PL_comppad = 0;
480	PL_in_eval = 0;
481	PL_curpm = 0;	555	PL_curpm = 0;
		556	PL_localizing = 0;
		557	PL_dirty = 0;
		558	PL_restartop = 0;
482		559
483	{	560	{
484	dSP;	561	dSP;
485	LOGOP myop;	562	LOGOP myop;
486		563
487	/* I have no idea why this is needed, but it is */
488	PUSHMARK (SP);
489
490	SvREFCNT_dec (GvAV (PL_defgv));	564	SvREFCNT_dec (GvAV (PL_defgv));
491	GvAV (PL_defgv) = coro->args; coro->args = 0;	565	GvAV (PL_defgv) = coro->args; coro->args = 0;
492		566
493	Zero (&myop, 1, LOGOP);	567	Zero (&myop, 1, LOGOP);
494	myop.op_next = Nullop;	568	myop.op_next = Nullop;
495	myop.op_flags = OPf_WANT_VOID;	569	myop.op_flags = OPf_WANT_VOID;
496		570
		571	PUSHMARK (SP);
		572	XPUSHs (av_shift (GvAV (PL_defgv)));
		573	PUTBACK;
497	PL_op = (OP *)&myop;	574	PL_op = (OP *)&myop;
498
499	PUSHMARK (SP);
500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
501	PUTBACK;
502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	575	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
503	SPAGAIN;	576	SPAGAIN;
504
505	ENTER; /* necessary e.g. for dounwind */
506	}	577	}
507	}
508		578
		579	ENTER; /* necessary e.g. for dounwind */
		580	}
		581
509	static void	582	static void
510	free_coro_mortal ()	583	free_coro_mortal (pTHX)
511	{	584	{
512	if (coro_mortal)	585	if (coro_mortal)
513	{	586	{
514	SvREFCNT_dec (coro_mortal);	587	SvREFCNT_dec (coro_mortal);
515	coro_mortal = 0;	588	coro_mortal = 0;
516	}	589	}
517	}	590	}
518		591
		592	/* inject a fake call to Coro::State::_cctx_init into the execution */
		593	/* _cctx_init shoukld be careful, as it could be called at almost any time */
		594	/* during execution of a pelr program */
519	static void NOINLINE	595	static void NOINLINE
520	prepare_cctx (coro_cctx *cctx)	596	prepare_cctx (pTHX_ coro_cctx *cctx)
521	{	597	{
522	dSP;	598	dSP;
523	LOGOP myop;	599	LOGOP myop;
524		600
525	Zero (&myop, 1, LOGOP);	601	Zero (&myop, 1, LOGOP);
526	myop.op_next = PL_op;	602	myop.op_next = PL_op;
527	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
528
529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530		604
531	PUSHMARK (SP);	605	PUSHMARK (SP);
		606	EXTEND (SP, 2);
		607	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	608	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533	PUTBACK;	609	PUTBACK;
		610	PL_op = (OP *)&myop;
534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	611	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535	SPAGAIN;	612	SPAGAIN;
536	}	613	}
537		614
		615	/*
		616	* this is a _very_ stripped down perl interpreter ;)
		617	*/
538	static void	618	static void
539	coro_run (void *arg)	619	coro_run (void *arg)
540	{	620	{
		621	dTHX;
		622
541	/* coro_run is the alternative epilogue of transfer() */	623	/* coro_run is the alternative tail of transfer(), so unlock here. */
542	UNLOCK;	624	UNLOCK;
543		625
		626	PL_top_env = &PL_start_env;
		627
		628	/* inject a fake subroutine call to cctx_init */
		629	prepare_cctx (aTHX_ (coro_cctx *)arg);
		630
		631	/* somebody or something will hit me for both perl_run and PL_restartop */
		632	PL_restartop = PL_op;
		633	perl_run (PL_curinterp);
		634
544	/*	635	/*
545	* this is a _very_ stripped down perl interpreter ;)	636	* If perl-run returns we assume exit() was being called or the coro
		637	* fell off the end, which seems to be the only valid (non-bug)
		638	* reason for perl_run to return. We try to exit by jumping to the
		639	* bootstrap-time "top" top_env, as we cannot restore the "main"
		640	* coroutine as Coro has no such concept
546	*/	641	*/
547	PL_top_env = &PL_start_env;	642	PL_top_env = main_top_env;
548		643	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
549	/* inject call to cctx_init */
550	prepare_cctx ((coro_cctx *)arg);
551
552	/* somebody will hit me for both perl_run and PL_restartop */
553	perl_run (PL_curinterp);
554
555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
556	abort ();
557	}	644	}
558		645
559	static coro_cctx *	646	static coro_cctx *
560	cctx_new ()	647	cctx_new ()
561	{	648	{
562	coro_cctx *cctx;	649	coro_cctx *cctx;
		650	void *stack_start;
		651	size_t stack_size;
563		652
564	++cctx_count;	653	++cctx_count;
565		654
566	New (0, cctx, 1, coro_cctx);	655	Newz (0, cctx, 1, coro_cctx);
567		656
568	#if HAVE_MMAP	657	#if HAVE_MMAP
569		658
570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	659	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
571	/* mmap suppsedly does allocate-on-write for us */	660	/* 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);	661	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
573		662
574	if (cctx->sptr == (void *)-1)	663	if (cctx->sptr != (void *)-1)
575	{
576	perror ("FATAL: unable to mmap stack for coroutine");
577	_exit (EXIT_FAILURE);
578	}	664	{
579
580	# if STACKGUARD	665	# if CORO_STACKGUARD
581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	666	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
582	# endif	667	# endif
		668	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		669	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		670	cctx->mapped = 1;
		671	}
		672	else
		673	#endif
		674	{
		675	cctx->ssize = coro_stacksize * (long)sizeof (long);
		676	New (0, cctx->sptr, coro_stacksize, long);
583		677
584	#else
585
586	cctx->ssize = STACKSIZE * (long)sizeof (long);
587	New (0, cctx->sptr, STACKSIZE, long);
588
589	if (!cctx->sptr)	678	if (!cctx->sptr)
590	{	679	{
591	perror ("FATAL: unable to malloc stack for coroutine");	680	perror ("FATAL: unable to allocate stack for coroutine");
592	_exit (EXIT_FAILURE);	681	_exit (EXIT_FAILURE);
593	}	682	}
594		683
595	#endif	684	stack_start = cctx->sptr;
		685	stack_size = cctx->ssize;
		686	}
596		687
597	#if USE_VALGRIND	688	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);	689	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
605		690
606	return cctx;	691	return cctx;
607	}	692	}
608		693
609	static void	694	static void
610	cctx_free (coro_cctx *cctx)	695	cctx_destroy (coro_cctx *cctx)
611	{	696	{
612	if (!cctx)	697	if (!cctx)
613	return;	698	return;
614		699
615	--cctx_count;	700	--cctx_count;
616		701
617	#if USE_VALGRIND	702	#if CORO_USE_VALGRIND
618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	703	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619	#endif	704	#endif
620		705
621	#if HAVE_MMAP	706	#if HAVE_MMAP
		707	if (cctx->mapped)
622	munmap (cctx->sptr, cctx->ssize);	708	munmap (cctx->sptr, cctx->ssize);
623	#else	709	else
		710	#endif
624	Safefree (cctx->sptr);	711	Safefree (cctx->sptr);
625	#endif
626		712
627	Safefree (cctx);	713	Safefree (cctx);
628	}	714	}
629		715
630	static coro_cctx *	716	static coro_cctx *
631	cctx_get ()	717	cctx_get (pTHX)
632	{	718	{
633	coro_cctx *cctx;
634
635	if (cctx_first)	719	while (cctx_first)
636	{	720	{
		721	coro_cctx *cctx = cctx_first;
		722	cctx_first = cctx->next;
637	--cctx_idle;	723	--cctx_idle;
638	cctx = cctx_first;	724
639	cctx_first = cctx->next;	725	if (cctx->ssize >= coro_stacksize)
		726	return cctx;
		727
		728	cctx_destroy (cctx);
640	}	729	}
641	else	730
642	{
643	cctx = cctx_new ();
644	PL_op = PL_op->op_next;	731	PL_op = PL_op->op_next;
645	}
646
647	return cctx;	732	return cctx_new ();
648	}	733	}
649		734
650	static void	735	static void
651	cctx_put (coro_cctx *cctx)	736	cctx_put (coro_cctx *cctx)
652	{	737	{
		738	/* free another cctx if overlimit */
		739	if (cctx_idle >= MAX_IDLE_CCTX)
		740	{
		741	coro_cctx *first = cctx_first;
		742	cctx_first = first->next;
		743	--cctx_idle;
		744
		745	assert (!first->inuse);
		746	cctx_destroy (first);
		747	}
		748
653	++cctx_idle;	749	++cctx_idle;
654	cctx->next = cctx_first;	750	cctx->next = cctx_first;
655	cctx_first = cctx;	751	cctx_first = cctx;
656	}	752	}
657		753
		754	/** coroutine switching *****************************************************/
		755
658	/* never call directly, always through the coro_state_transfer global variable */	756	/* never call directly, always through the coro_state_transfer global variable */
659	static void NOINLINE	757	static void NOINLINE
660	transfer (struct coro *prev, struct coro *next, int flags)	758	transfer (pTHX_ struct coro *prev, struct coro *next)
661	{	759	{
662	dSTACKLEVEL;	760	dSTACKLEVEL;
663		761
664	/* sometimes transfer is only called to set idle_sp */	762	/* sometimes transfer is only called to set idle_sp */
665	if (flags == TRANSFER_SET_STACKLEVEL)	763	if (!next)
		764	{
666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	765	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		766	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		767	}
667	else if (prev != next)	768	else if (prev != next)
668	{	769	{
669	coro_cctx *prev__cctx;	770	coro_cctx *prev__cctx;
670		771
		772	if (prev->flags & CF_NEW)
		773	{
		774	/* create a new empty context */
		775	Newz (0, prev->cctx, 1, coro_cctx);
		776	prev->cctx->inuse = 1;
		777	prev->flags &= ~CF_NEW;
		778	prev->flags |= CF_RUNNING;
		779	}
		780
		781	/*TODO: must not croak here */
		782	if (!prev->flags & CF_RUNNING)
		783	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		784
		785	if (next->flags & CF_RUNNING)
		786	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		787
		788	if (next->flags & CF_DESTROYED)
		789	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		790
		791	prev->flags &= ~CF_RUNNING;
		792	next->flags |= CF_RUNNING;
		793
671	LOCK;	794	LOCK;
672		795
673	if (next->mainstack)	796	if (next->flags & CF_NEW)
674	{	797	{
675	/* coroutine already started */	798	/* need to start coroutine */
676	SAVE (prev, flags);	799	next->flags &= ~CF_NEW;
677	LOAD (next);	800	/* first get rid of the old state */
		801	save_perl (aTHX_ prev);
		802	/* setup coroutine call */
		803	setup_coro (aTHX_ next);
		804	/* need a new stack */
		805	assert (!next->cctx);
678	}	806	}
679	else	807	else
680	{	808	{
681	/* need to start coroutine */	809	/* coroutine already started */
682	/* first get rid of the old state */	810	save_perl (aTHX_ prev);
683	SAVE (prev, -1);	811	load_perl (aTHX_ next);
684	/* setup coroutine call */
685	setup_coro (next);
686	/* need a stack */
687	next->cctx = 0;
688	}	812	}
689
690	if (!prev->cctx)
691	/* create a new empty context */
692	Newz (0, prev->cctx, 1, coro_cctx);
693		813
694	prev__cctx = prev->cctx;	814	prev__cctx = prev->cctx;
695		815
696	/* possibly "free" the cctx */	816	/* possibly "free" the cctx */
697	if (prev__cctx->idle_sp == STACKLEVEL)	817	if (prev__cctx->idle_sp == STACKLEVEL)
698	{	818	{
699	assert (PL_top_env == prev__cctx->top_env);//D	819	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		820	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		821
		822	prev->cctx = 0;
		823
700	cctx_put (prev__cctx);	824	cctx_put (prev__cctx);
701	prev->cctx = 0;	825	prev__cctx->inuse = 0;
702	}	826	}
703		827
704	if (!next->cctx)	828	if (!next->cctx)
		829	{
705	next->cctx = cctx_get ();	830	next->cctx = cctx_get (aTHX);
		831	assert (!next->cctx->inuse);
		832	next->cctx->inuse = 1;
		833	}
706		834
707	if (prev__cctx != next->cctx)	835	if (prev__cctx != next->cctx)
708	{	836	{
709	prev__cctx->top_env = PL_top_env;	837	prev__cctx->top_env = PL_top_env;
710	PL_top_env = next->cctx->top_env;	838	PL_top_env = next->cctx->top_env;
711	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	839	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
712	}	840	}
713		841
714	free_coro_mortal ();	842	free_coro_mortal (aTHX);
715
716	UNLOCK;	843	UNLOCK;
717	}	844	}
718	}	845	}
719		846
720	struct transfer_args	847	struct transfer_args
721	{	848	{
722	struct coro *prev, *next;	849	struct coro *prev, *next;
723	int flags;
724	};	850	};
725		851
726	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	852	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
727		853
		854	/** high level stuff ********************************************************/
		855
728	static void	856	static int
729	coro_state_destroy (struct coro *coro)	857	coro_state_destroy (pTHX_ struct coro *coro)
730	{	858	{
731	if (coro->refcnt--)	859	if (coro->flags & CF_DESTROYED)
732	return;	860	return 0;
		861
		862	coro->flags |= CF_DESTROYED;
		863
		864	if (coro->flags & CF_READY)
		865	{
		866	/* reduce nready, as destroying a ready coro effectively unreadies it */
		867	/* alternative: look through all ready queues and remove the coro */
		868	LOCK;
		869	--coro_nready;
		870	UNLOCK;
		871	}
		872	else
		873	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
733		874
734	if (coro->mainstack && coro->mainstack != main_mainstack)	875	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	876	{
736	struct coro temp;	877	struct coro temp;
737		878
738	SAVE ((&temp), TRANSFER_SAVE_ALL);	879	assert (!(coro->flags & CF_RUNNING));
739	LOAD (coro);
740		880
		881	Zero (&temp, 1, struct coro);
		882	temp.save = CORO_SAVE_DEF;
		883
		884	if (coro->flags & CF_RUNNING)
		885	croak ("FATAL: tried to destroy currently running coroutine");
		886
		887	save_perl (aTHX_ &temp);
		888	load_perl (aTHX_ coro);
		889
741	coro_destroy_stacks ();	890	coro_destroy_stacks (aTHX);
742		891
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	892	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
744		893
745	coro->mainstack = 0;	894	coro->mainstack = 0;
746	}	895	}
747		896
748	cctx_free (coro->cctx);	897	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	898	SvREFCNT_dec (coro->args);
750	Safefree (coro);	899
		900	return 1;
751	}	901	}
752		902
753	static int	903	static int
754	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	904	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
755	{	905	{
756	struct coro *coro = (struct coro *)mg->mg_ptr;	906	struct coro *coro = (struct coro *)mg->mg_ptr;
757	mg->mg_ptr = 0;	907	mg->mg_ptr = 0;
758		908
		909	if (--coro->refcnt < 0)
		910	{
759	coro_state_destroy (coro);	911	coro_state_destroy (aTHX_ coro);
		912	Safefree (coro);
		913	}
760		914
761	return 0;	915	return 0;
762	}	916	}
763		917
764	static int	918	static int
…		…
771	return 0;	925	return 0;
772	}	926	}
773		927
774	static MGVTBL coro_state_vtbl = {	928	static MGVTBL coro_state_vtbl = {
775	0, 0, 0, 0,	929	0, 0, 0, 0,
776	coro_state_clear,	930	coro_state_free,
777	0,	931	0,
778	#ifdef MGf_DUP	932	#ifdef MGf_DUP
779	coro_state_dup,	933	coro_state_dup,
780	#else	934	#else
781	# define MGf_DUP 0	935	# define MGf_DUP 0
782	#endif	936	#endif
783	};	937	};
784		938
785	static struct coro *	939	static struct coro *
786	SvSTATE (SV *coro)	940	SvSTATE_ (pTHX_ SV *coro)
787	{	941	{
788	HV *stash;	942	HV *stash;
789	MAGIC *mg;	943	MAGIC *mg;
790		944
791	if (SvROK (coro))	945	if (SvROK (coro))
…		…
797	/* very slow, but rare, check */	951	/* very slow, but rare, check */
798	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	952	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
799	croak ("Coro::State object required");	953	croak ("Coro::State object required");
800	}	954	}
801		955
802	mg = SvMAGIC (coro);	956	mg = CORO_MAGIC (coro);
803	assert (mg->mg_type == PERL_MAGIC_ext);
804	return (struct coro *)mg->mg_ptr;	957	return (struct coro *)mg->mg_ptr;
805	}	958	}
806		959
		960	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		961
807	static void	962	static void
808	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	963	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
809	{	964	{
810	ta->prev = SvSTATE (prev);	965	ta->prev = SvSTATE (prev_sv);
811	ta->next = SvSTATE (next);	966	ta->next = SvSTATE (next_sv);
812	ta->flags = flags;
813	}	967	}
814		968
815	static void	969	static void
816	api_transfer (SV *prev, SV *next, int flags)	970	api_transfer (SV *prev_sv, SV *next_sv)
817	{	971	{
818	dTHX;	972	dTHX;
819	struct transfer_args ta;	973	struct transfer_args ta;
820		974
821	prepare_transfer (&ta, prev, next, flags);	975	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
822	TRANSFER (ta);	976	TRANSFER (ta);
823	}	977	}
824		978
		979	static int
		980	api_save (SV *coro_sv, int new_save)
		981	{
		982	dTHX;
		983	struct coro *coro = SvSTATE (coro_sv);
		984	int old_save = coro->save;
		985
		986	if (new_save >= 0)
		987	coro->save = new_save;
		988
		989	return old_save;
		990	}
		991
825	/** Coro ********************************************************************/	992	/** Coro ********************************************************************/
826		993
827	#define PRIO_MAX 3
828	#define PRIO_HIGH 1
829	#define PRIO_NORMAL 0
830	#define PRIO_LOW -1
831	#define PRIO_IDLE -3
832	#define PRIO_MIN -4
833
834	/* for Coro.pm */
835	static GV *coro_current, *coro_idle;
836	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
837	static int coro_nready;
838
839	static void	994	static void
840	coro_enq (SV *sv)	995	coro_enq (pTHX_ SV *coro_sv)
841	{	996	{
842	int prio;
843
844	if (SvTYPE (sv) != SVt_PVHV)
845	croak ("Coro::ready tried to enqueue something that is not a coroutine");
846
847	prio = SvSTATE (sv)->prio;
848
849	av_push (coro_ready [prio - PRIO_MIN], sv);	997	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
850	coro_nready++;
851	}	998	}
852		999
853	static SV *	1000	static SV *
854	coro_deq (int min_prio)	1001	coro_deq (pTHX_ int min_prio)
855	{	1002	{
856	int prio = PRIO_MAX - PRIO_MIN;	1003	int prio = PRIO_MAX - PRIO_MIN;
857		1004
858	min_prio -= PRIO_MIN;	1005	min_prio -= PRIO_MIN;
859	if (min_prio < 0)	1006	if (min_prio < 0)
860	min_prio = 0;	1007	min_prio = 0;
861		1008
862	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1009	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
863	if (AvFILLp (coro_ready [prio]) >= 0)	1010	if (AvFILLp (coro_ready [prio]) >= 0)
864	{
865	coro_nready--;
866	return av_shift (coro_ready [prio]);	1011	return av_shift (coro_ready [prio]);
867	}
868		1012
869	return 0;	1013	return 0;
870	}	1014	}
871		1015
872	static void	1016	static int
873	api_ready (SV *coro)	1017	api_ready (SV *coro_sv)
874	{	1018	{
875	dTHX;	1019	dTHX;
		1020	struct coro *coro;
876		1021
877	if (SvROK (coro))	1022	if (SvROK (coro_sv))
878	coro = SvRV (coro);	1023	coro_sv = SvRV (coro_sv);
		1024
		1025	coro = SvSTATE (coro_sv);
		1026
		1027	if (coro->flags & CF_READY)
		1028	return 0;
		1029
		1030	coro->flags |= CF_READY;
879		1031
880	LOCK;	1032	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	1033	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1034	++coro_nready;
882	UNLOCK;	1035	UNLOCK;
883	}
884		1036
		1037	return 1;
		1038	}
		1039
885	static void	1040	static int
		1041	api_is_ready (SV *coro_sv)
		1042	{
		1043	dTHX;
		1044	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1045	}
		1046
		1047	static void
886	prepare_schedule (struct transfer_args *ta)	1048	prepare_schedule (pTHX_ struct transfer_args *ta)
887	{	1049	{
888	SV *current, *prev, *next;	1050	SV *prev_sv, *next_sv;
889
890	current = GvSV (coro_current);
891		1051
892	for (;;)	1052	for (;;)
893	{	1053	{
894	LOCK;	1054	LOCK;
895	next = coro_deq (PRIO_MIN);	1055	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1056
		1057	/* nothing to schedule: call the idle handler */
		1058	if (!next_sv)
		1059	{
		1060	dSP;
		1061	UNLOCK;
		1062
		1063	ENTER;
		1064	SAVETMPS;
		1065
		1066	PUSHMARK (SP);
		1067	PUTBACK;
		1068	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1069
		1070	FREETMPS;
		1071	LEAVE;
		1072	continue;
		1073	}
		1074
		1075	ta->next = SvSTATE (next_sv);
		1076
		1077	/* cannot transfer to destroyed coros, skip and look for next */
		1078	if (ta->next->flags & CF_DESTROYED)
		1079	{
		1080	UNLOCK;
		1081	SvREFCNT_dec (next_sv);
		1082	/* coro_nready is already taken care of by destroy */
		1083	continue;
		1084	}
		1085
		1086	--coro_nready;
896	UNLOCK;	1087	UNLOCK;
897
898	if (next)
899	break;	1088	break;
900
901	{
902	dSP;
903
904	ENTER;
905	SAVETMPS;
906
907	PUSHMARK (SP);
908	PUTBACK;
909	call_sv (GvSV (coro_idle), G_DISCARD);
910
911	FREETMPS;
912	LEAVE;
913	}	1089	}
914	}
915
916	prev = SvRV (current);
917	SvRV (current) = next;
918		1090
919	/* free this only after the transfer */	1091	/* free this only after the transfer */
		1092	prev_sv = SvRV (coro_current);
		1093	SvRV_set (coro_current, next_sv);
		1094	ta->prev = SvSTATE (prev_sv);
		1095
		1096	assert (ta->next->flags & CF_READY);
		1097	ta->next->flags &= ~CF_READY;
		1098
920	LOCK;	1099	LOCK;
921	free_coro_mortal ();	1100	free_coro_mortal (aTHX);
		1101	coro_mortal = prev_sv;
922	UNLOCK;	1102	UNLOCK;
923	coro_mortal = prev;
924
925	ta->prev = SvSTATE (prev);
926	ta->next = SvSTATE (next);
927	ta->flags = TRANSFER_SAVE_ALL;
928	}	1103	}
929		1104
930	static void	1105	static void
931	prepare_cede (struct transfer_args *ta)	1106	prepare_cede (pTHX_ struct transfer_args *ta)
932	{	1107	{
933	LOCK;	1108	api_ready (coro_current);
934	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
935	UNLOCK;
936
937	prepare_schedule (ta);	1109	prepare_schedule (aTHX_ ta);
		1110	}
		1111
		1112	static int
		1113	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1114	{
		1115	if (coro_nready)
		1116	{
		1117	SV *prev = SvRV (coro_current);
		1118	prepare_schedule (aTHX_ ta);
		1119	api_ready (prev);
		1120	return 1;
		1121	}
		1122	else
		1123	return 0;
938	}	1124	}
939		1125
940	static void	1126	static void
941	api_schedule (void)	1127	api_schedule (void)
942	{	1128	{
943	dTHX;	1129	dTHX;
944	struct transfer_args ta;	1130	struct transfer_args ta;
945		1131
946	prepare_schedule (&ta);	1132	prepare_schedule (aTHX_ &ta);
947	TRANSFER (ta);	1133	TRANSFER (ta);
948	}	1134	}
949		1135
950	static void	1136	static int
951	api_cede (void)	1137	api_cede (void)
952	{	1138	{
953	dTHX;	1139	dTHX;
954	struct transfer_args ta;	1140	struct transfer_args ta;
955		1141
956	prepare_cede (&ta);	1142	prepare_cede (aTHX_ &ta);
		1143
		1144	if (ta.prev != ta.next)
		1145	{
957	TRANSFER (ta);	1146	TRANSFER (ta);
		1147	return 1;
		1148	}
		1149	else
		1150	return 0;
		1151	}
		1152
		1153	static int
		1154	api_cede_notself (void)
		1155	{
		1156	dTHX;
		1157	struct transfer_args ta;
		1158
		1159	if (prepare_cede_notself (aTHX_ &ta))
		1160	{
		1161	TRANSFER (ta);
		1162	return 1;
		1163	}
		1164	else
		1165	return 0;
958	}	1166	}
959		1167
960	MODULE = Coro::State PACKAGE = Coro::State	1168	MODULE = Coro::State PACKAGE = Coro::State
961		1169
962	PROTOTYPES: DISABLE	1170	PROTOTYPES: DISABLE
…		…
968	#endif	1176	#endif
969	BOOT_PAGESIZE;	1177	BOOT_PAGESIZE;
970		1178
971	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1179	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
972		1180
973	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1181	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
974	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1182	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
975	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1183	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1184	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1185	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1186	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1187	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
976		1188
977	main_mainstack = PL_mainstack;	1189	main_mainstack = PL_mainstack;
		1190	main_top_env = PL_top_env;
		1191
		1192	while (main_top_env->je_prev)
		1193	main_top_env = main_top_env->je_prev;
978		1194
979	coroapi.ver = CORO_API_VERSION;	1195	coroapi.ver = CORO_API_VERSION;
980	coroapi.transfer = api_transfer;	1196	coroapi.transfer = api_transfer;
981		1197
982	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1198	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
990	HV *hv;	1206	HV *hv;
991	int i;	1207	int i;
992		1208
993	Newz (0, coro, 1, struct coro);	1209	Newz (0, coro, 1, struct coro);
994	coro->args = newAV ();	1210	coro->args = newAV ();
		1211	coro->save = CORO_SAVE_DEF;
		1212	coro->flags = CF_NEW;
995		1213
996	hv = newHV ();	1214	hv = newHV ();
997	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1215	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
998	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1216	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
999		1217
1000	for (i = 1; i < items; i++)	1218	for (i = 1; i < items; i++)
1001	av_push (coro->args, newSVsv (ST (i)));	1219	av_push (coro->args, newSVsv (ST (i)));
1002	}	1220	}
1003	OUTPUT:	1221	OUTPUT:
		1222	RETVAL
		1223
		1224	int
		1225	save (SV *coro, int new_save = -1)
		1226	CODE:
		1227	RETVAL = api_save (coro, new_save);
		1228	OUTPUT:
		1229	RETVAL
		1230
		1231	int
		1232	save_also (SV *coro_sv, int save_also)
		1233	CODE:
		1234	{
		1235	struct coro *coro = SvSTATE (coro_sv);
		1236	RETVAL = coro->save;
		1237	coro->save |= save_also;
		1238	}
		1239	OUTPUT:
1004	RETVAL	1240	RETVAL
1005		1241
1006	void	1242	void
1007	_set_stacklevel (...)	1243	_set_stacklevel (...)
1008	ALIAS:	1244	ALIAS:
1009	Coro::State::transfer = 1	1245	Coro::State::transfer = 1
1010	Coro::schedule = 2	1246	Coro::schedule = 2
1011	Coro::cede = 3	1247	Coro::cede = 3
1012	Coro::Cont::yield = 4	1248	Coro::cede_notself = 4
1013	CODE:	1249	CODE:
1014	{	1250	{
1015	struct transfer_args ta;	1251	struct transfer_args ta;
1016		1252
1017	switch (ix)	1253	switch (ix)
1018	{	1254	{
1019	case 0:	1255	case 0:
1020	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1256	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1021	ta.next = 0;	1257	ta.next = 0;
1022	ta.flags = TRANSFER_SET_STACKLEVEL;
1023	break;	1258	break;
1024		1259
1025	case 1:	1260	case 1:
1026	if (items != 3)	1261	if (items != 2)
1027	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1262	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1028		1263
1029	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1264	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1030	break;	1265	break;
1031		1266
1032	case 2:	1267	case 2:
1033	prepare_schedule (&ta);	1268	prepare_schedule (aTHX_ &ta);
1034	break;	1269	break;
1035		1270
1036	case 3:	1271	case 3:
1037	prepare_cede (&ta);	1272	prepare_cede (aTHX_ &ta);
1038	break;	1273	break;
1039		1274
1040	case 4:	1275	case 4:
1041	{	1276	if (!prepare_cede_notself (aTHX_ &ta))
1042	SV *yieldstack;	1277	XSRETURN_EMPTY;
1043	SV *sv;
1044	AV *defav = GvAV (PL_defgv);
1045		1278
1046	yieldstack = *hv_fetch (
1047	(HV *)SvRV (GvSV (coro_current)),
1048	"yieldstack", sizeof ("yieldstack") - 1,
1049	0
1050	);
1051
1052	/* set up @_ -- ugly */
1053	av_clear (defav);
1054	av_fill (defav, items - 1);
1055	while (items--)
1056	av_store (defav, items, SvREFCNT_inc (ST(items)));
1057
1058	sv = av_pop ((AV *)SvRV (yieldstack));
1059	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1060	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1061	ta.flags = 0;
1062	SvREFCNT_dec (sv);
1063	}
1064	break;	1279	break;
1065
1066	}	1280	}
1067		1281
		1282	BARRIER;
1068	TRANSFER (ta);	1283	TRANSFER (ta);
1069	}
1070		1284
1071	void	1285	if (GIMME_V != G_VOID && ta.next != ta.prev)
1072	_clone_state_from (SV *dst, SV *src)	1286	XSRETURN_YES;
		1287	}
		1288
		1289	bool
		1290	_destroy (SV *coro_sv)
1073	CODE:	1291	CODE:
1074	{	1292	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1075	struct coro *coro_src = SvSTATE (src);	1293	OUTPUT:
1076		1294	RETVAL
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1081	}
1082		1295
1083	void	1296	void
1084	_exit (code)	1297	_exit (code)
1085	int code	1298	int code
1086	PROTOTYPE: $	1299	PROTOTYPE: $
1087	CODE:	1300	CODE:
1088	_exit (code);	1301	_exit (code);
1089		1302
1090	int	1303	int
		1304	cctx_stacksize (int new_stacksize = 0)
		1305	CODE:
		1306	RETVAL = coro_stacksize;
		1307	if (new_stacksize)
		1308	coro_stacksize = new_stacksize;
		1309	OUTPUT:
		1310	RETVAL
		1311
		1312	int
1091	cctx_count ()	1313	cctx_count ()
1092	CODE:	1314	CODE:
1093	RETVAL = cctx_count;	1315	RETVAL = cctx_count;
1094	OUTPUT:	1316	OUTPUT:
1095	RETVAL	1317	RETVAL
…		…
1114	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1336	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1115	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1337	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1116	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1338	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1117	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1339	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1118		1340
1119	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1341	coro_current = get_sv ("Coro::current", FALSE);
1120	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1342	SvREADONLY_on (coro_current);
1121		1343
1122	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1344	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1123	coro_ready[i] = newAV ();	1345	coro_ready[i] = newAV ();
1124		1346
1125	{	1347	{
1126	SV *sv = perl_get_sv("Coro::API", 1);	1348	SV *sv = perl_get_sv("Coro::API", 1);
1127		1349
1128	coroapi.schedule = api_schedule;	1350	coroapi.schedule = api_schedule;
		1351	coroapi.save = api_save;
1129	coroapi.cede = api_cede;	1352	coroapi.cede = api_cede;
		1353	coroapi.cede_notself = api_cede_notself;
1130	coroapi.ready = api_ready;	1354	coroapi.ready = api_ready;
		1355	coroapi.is_ready = api_is_ready;
1131	coroapi.nready = &coro_nready;	1356	coroapi.nready = &coro_nready;
1132	coroapi.current = coro_current;	1357	coroapi.current = coro_current;
1133		1358
1134	GCoroAPI = &coroapi;	1359	GCoroAPI = &coroapi;
1135	sv_setiv (sv, (IV)&coroapi);	1360	sv_setiv (sv, (IV)&coroapi);
1136	SvREADONLY_on (sv);	1361	SvREADONLY_on (sv);
1137	}	1362	}
1138	}	1363	}
		1364
		1365	void
		1366	_set_current (SV *current)
		1367	PROTOTYPE: $
		1368	CODE:
		1369	SvREFCNT_dec (SvRV (coro_current));
		1370	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1139		1371
1140	int	1372	int
1141	prio (Coro::State coro, int newprio = 0)	1373	prio (Coro::State coro, int newprio = 0)
1142	ALIAS:	1374	ALIAS:
1143	nice = 1	1375	nice = 1
…		…
1146	RETVAL = coro->prio;	1378	RETVAL = coro->prio;
1147		1379
1148	if (items > 1)	1380	if (items > 1)
1149	{	1381	{
1150	if (ix)	1382	if (ix)
1151	newprio += coro->prio;	1383	newprio = coro->prio - newprio;
1152		1384
1153	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1385	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1154	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1386	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1155		1387
1156	coro->prio = newprio;	1388	coro->prio = newprio;
1157	}	1389	}
1158	}	1390	}
		1391	OUTPUT:
		1392	RETVAL
1159		1393
1160	void	1394	SV *
1161	ready (SV *self)	1395	ready (SV *self)
1162	PROTOTYPE: $	1396	PROTOTYPE: $
1163	CODE:	1397	CODE:
1164	api_ready (self);	1398	RETVAL = boolSV (api_ready (self));
		1399	OUTPUT:
		1400	RETVAL
		1401
		1402	SV *
		1403	is_ready (SV *self)
		1404	PROTOTYPE: $
		1405	CODE:
		1406	RETVAL = boolSV (api_is_ready (self));
		1407	OUTPUT:
		1408	RETVAL
1165		1409
1166	int	1410	int
1167	nready (...)	1411	nready (...)
1168	PROTOTYPE:	1412	PROTOTYPE:
1169	CODE:	1413	CODE:
…		…
1175		1419
1176	SV *	1420	SV *
1177	_get_state ()	1421	_get_state ()
1178	CODE:	1422	CODE:
1179	{	1423	{
1180	struct {	1424	struct io_state *data;
1181	int errorno;
1182	int laststype;
1183	int laststatval;
1184	Stat_t statcache;
1185	} data;
1186		1425
		1426	RETVAL = newSV (sizeof (struct io_state));
		1427	data = (struct io_state *)SvPVX (RETVAL);
		1428	SvCUR_set (RETVAL, sizeof (struct io_state));
		1429	SvPOK_only (RETVAL);
		1430
1187	data.errorno = errno;	1431	data->errorno = errno;
1188	data.laststype = PL_laststype;	1432	data->laststype = PL_laststype;
1189	data.laststatval = PL_laststatval;	1433	data->laststatval = PL_laststatval;
1190	data.statcache = PL_statcache;	1434	data->statcache = PL_statcache;
1191
1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
1193	}	1435	}
1194	OUTPUT:	1436	OUTPUT:
1195	RETVAL	1437	RETVAL
1196		1438
1197	void	1439	void
1198	_set_state (char *data_)	1440	_set_state (char *data_)
1199	PROTOTYPE: $	1441	PROTOTYPE: $
1200	CODE:	1442	CODE:
1201	{	1443	{
1202	struct {	1444	struct io_state *data = (void *)data_;
1203	int errorno;
1204	int laststype;
1205	int laststatval;
1206	Stat_t statcache;
1207	} *data = (void *)data_;
1208		1445
1209	errno = data->errorno;	1446	errno = data->errorno;
1210	PL_laststype = data->laststype;	1447	PL_laststype = data->laststype;
1211	PL_laststatval = data->laststatval;	1448	PL_laststatval = data->laststatval;
1212	PL_statcache = data->statcache;	1449	PL_statcache = data->statcache;
1213	}	1450	}
		1451

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