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Comparing Coro/Coro/State.xs (file contents):
Revision 1.107 by root, Mon Nov 27 02:15:51 2006 UTC vs.
Revision 1.145 by root, Mon Mar 12 21:40:14 2007 UTC

…		…
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
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>	9	#include <stdio.h>
41	#include <errno.h>	10	#include <errno.h>
42		11	#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		12
51	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
52	# include <unistd.h>	14	# include <unistd.h>
53	# include <sys/mman.h>	15	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
…		…
69	#else	31	#else
70	# define PAGESIZE 0	32	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	33	# define BOOT_PAGESIZE (void)0
72	#endif	34	#endif
73		35
		36	#if CORO_USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
		42
		43	/* the maximum number of idle cctx that will be pooled */
		44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	|| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
		53	# ifndef PL_ppaddr
		54	# define PL_ppaddr ppaddr
		55	# endif
		56	# ifndef call_sv
		57	# define call_sv perl_call_sv
		58	# endif
		59	# ifndef get_sv
		60	# define get_sv perl_get_sv
		61	# endif
		62	# ifndef get_cv
		63	# define get_cv perl_get_cv
		64	# endif
		65	# ifndef IS_PADGV
		66	# define IS_PADGV(v) 0
		67	# endif
		68	# ifndef IS_PADCONST
		69	# define IS_PADCONST(v) 0
		70	# endif
		71	#endif
		72
		73	/* 5.8.7 */
		74	#ifndef SvRV_set
		75	# define SvRV_set(s,v) SvRV(s) = (v)
		76	#endif
		77
		78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		79	# undef CORO_STACKGUARD
		80	#endif
		81
		82	#ifndef CORO_STACKGUARD
		83	# define CORO_STACKGUARD 0
		84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef CORO_PREFER_PERL_FUNCTIONS
		88	# define CORO_PREFER_PERL_FUNCTIONS 0
		89	#endif
		90
74	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* 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	92	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	93	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	94	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	95	#define STACKLEVEL ((void *)&stacklevel)
79		96
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		98
82	#if __GNUC__ >= 3	99	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	102	#else
85	# define attribute(x)	103	# define attribute(x)
		104	# define BARRIER
86	#endif	105	#endif
87		106
88	#define NOINLINE attribute ((noinline))	107	#define NOINLINE attribute ((noinline))
89		108
90	#include "CoroAPI.h"	109	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		110
94	#ifdef USE_ITHREADS	111	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	112	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	115	#else
99	# define LOCK (void)0	116	# define LOCK (void)0
100	# define UNLOCK (void)0	117	# define UNLOCK (void)0
101	#endif	118	#endif
102		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
		129	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	130	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	131	static AV *main_mainstack; /* used to differentiate between $main and others */
105	static HV *coro_state_stash, *coro_stash;	132	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	133	static SV *coro_mortal; /* will be freed after next transfer */
107		134
…		…
112	typedef struct coro_cctx {	139	typedef struct coro_cctx {
113	struct coro_cctx *next;	140	struct coro_cctx *next;
114		141
115	/* the stack */	142	/* the stack */
116	void *sptr;	143	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	144	size_t ssize;
118		145
119	/* cpu state */	146	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	147	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		148	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	149	JMPENV *top_env;
122	coro_context cctx;	150	coro_context cctx;
123		151
124	#if USE_VALGRIND	152	#if CORO_USE_VALGRIND
125	int valgrind_id;	153	int valgrind_id;
126	#endif	154	#endif
		155	char inuse, mapped;
127	} coro_cctx;	156	} coro_cctx;
		157
		158	enum {
		159	CF_RUNNING = 0x0001, /* coroutine is running */
		160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		163	};
128		164
129	/* this is a structure representing a perl-level coroutine */	165	/* this is a structure representing a perl-level coroutine */
130	struct coro {	166	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	167	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	168	coro_cctx *cctx;
133		169
134	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
135	AV *args;	171	AV *args;
136	int refcnt;	172	int refcnt;
		173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
137		175
138	/* optionally saved, might be zero */	176	/* optionally saved, might be zero */
139	AV *defav;	177	AV *defav; /* @_ */
140	SV *defsv;	178	SV *defsv; /* $_ */
141	SV *errsv;	179	SV *errsv; /* $@ */
		180	SV *irssv; /* $/ */
		181	SV *irssv_sv; /* real $/ cache */
142		182
143	/* saved global state not related to stacks */	183	#define VAR(name,type) type name;
144	U8 dowarn;	184	# include "state.h"
145	I32 in_eval;	185	#undef VAR
146
147	/* the stacks and related info (callchain etc..) */
148	PERL_SI *curstackinfo;
149	AV *curstack;
150	AV *mainstack;
151	SV **stack_sp;
152	OP *op;
153	SV **curpad;
154	AV *comppad;
155	CV *compcv;
156	SV **stack_base;
157	SV **stack_max;
158	SV **tmps_stack;
159	I32 tmps_floor;
160	I32 tmps_ix;
161	I32 tmps_max;
162	I32 *markstack;
163	I32 *markstack_ptr;
164	I32 *markstack_max;
165	I32 *scopestack;
166	I32 scopestack_ix;
167	I32 scopestack_max;
168	ANY *savestack;
169	I32 savestack_ix;
170	I32 savestack_max;
171	OP **retstack;
172	I32 retstack_ix;
173	I32 retstack_max;
174	PMOP *curpm;
175	COP *curcop;
176		186
177	/* coro process data */	187	/* coro process data */
178	int prio;	188	int prio;
179	};	189	};
180		190
181	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
182	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
		193
		194	/** Coro ********************************************************************/
		195
		196	#define PRIO_MAX 3
		197	#define PRIO_HIGH 1
		198	#define PRIO_NORMAL 0
		199	#define PRIO_LOW -1
		200	#define PRIO_IDLE -3
		201	#define PRIO_MIN -4
		202
		203	/* for Coro.pm */
		204	static SV *coro_current;
		205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		206	static int coro_nready;
		207
		208	/** lowlevel stuff **********************************************************/
183		209
184	static AV *	210	static AV *
185	coro_clone_padlist (CV *cv)	211	coro_clone_padlist (CV *cv)
186	{	212	{
187	AV *padlist = CvPADLIST (cv);	213	AV *padlist = CvPADLIST (cv);
…		…
244		270
245	#define PERL_MAGIC_coro PERL_MAGIC_ext	271	#define PERL_MAGIC_coro PERL_MAGIC_ext
246		272
247	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
248		274
		275	#define CORO_MAGIC(cv) \
		276	SvMAGIC (cv) \
		277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		278	? SvMAGIC (cv) \
		279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		280	: 0
		281
249	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
250	static void	283	static void
251	get_padlist (CV *cv)	284	get_padlist (CV *cv)
252	{	285	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
254		288
255	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
256	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
257	else	291	else
258	{	292	{
259	#if 0	293	#if CORO_PREFER_PERL_FUNCTIONS
260	/* this is probably cleaner, but also slower? */	294	/* this is probably cleaner, but also slower? */
261	CV *cp = Perl_cv_clone (cv);	295	CV *cp = Perl_cv_clone (cv);
262	CvPADLIST (cv) = CvPADLIST (cp);	296	CvPADLIST (cv) = CvPADLIST (cp);
263	CvPADLIST (cp) = 0;	297	CvPADLIST (cp) = 0;
264	SvREFCNT_dec (cp);	298	SvREFCNT_dec (cp);
…		…
269	}	303	}
270		304
271	static void	305	static void
272	put_padlist (CV *cv)	306	put_padlist (CV *cv)
273	{	307	{
274	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
275		310
276	if (!mg)	311	if (!mg)
277	{	312	{
278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
280	mg->mg_virtual = &vtbl_coro;	315	mg->mg_virtual = &vtbl_coro;
281	mg->mg_obj = (SV *)newAV ();	316	mg->mg_obj = (SV *)newAV ();
282	}	317	}
283		318
284	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	319	av = (AV *)mg->mg_obj;
		320
		321	if (AvFILLp (av) >= AvMAX (av))
		322	av_extend (av, AvMAX (av) + 1);
		323
		324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285	}	325	}
		326
		327	/** load & save, init *******************************************************/
286		328
287	#define SB do {	329	#define SB do {
288	#define SE } while (0)	330	#define SE } while (0)
289		331
290	#define LOAD(state) load_state((state));
291	#define SAVE(state,flags) save_state((state),(flags));
292
293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
294		333
295	static void	334	static void
296	load_state(Coro__State c)	335	load_perl (Coro__State c)
297	{	336	{
298	PL_dowarn = c->dowarn;	337	#define VAR(name,type) PL_ ## name = c->name;
299	PL_in_eval = c->in_eval;	338	# include "state.h"
300		339	#undef VAR
301	PL_curstackinfo = c->curstackinfo;
302	PL_curstack = c->curstack;
303	PL_mainstack = c->mainstack;
304	PL_stack_sp = c->stack_sp;
305	PL_op = c->op;
306	PL_curpad = c->curpad;
307	PL_comppad = c->comppad;
308	PL_compcv = c->compcv;
309	PL_stack_base = c->stack_base;
310	PL_stack_max = c->stack_max;
311	PL_tmps_stack = c->tmps_stack;
312	PL_tmps_floor = c->tmps_floor;
313	PL_tmps_ix = c->tmps_ix;
314	PL_tmps_max = c->tmps_max;
315	PL_markstack = c->markstack;
316	PL_markstack_ptr = c->markstack_ptr;
317	PL_markstack_max = c->markstack_max;
318	PL_scopestack = c->scopestack;
319	PL_scopestack_ix = c->scopestack_ix;
320	PL_scopestack_max = c->scopestack_max;
321	PL_savestack = c->savestack;
322	PL_savestack_ix = c->savestack_ix;
323	PL_savestack_max = c->savestack_max;
324	#if !PERL_VERSION_ATLEAST (5,9,0)
325	PL_retstack = c->retstack;
326	PL_retstack_ix = c->retstack_ix;
327	PL_retstack_max = c->retstack_max;
328	#endif
329	PL_curpm = c->curpm;
330	PL_curcop = c->curcop;
331		340
332	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
333	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
334	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		344	if (c->irssv)
		345	{
		346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		347	SvREFCNT_dec (c->irssv);
		348	else
		349	{
		350	REPLACE_SV (PL_rs, c->irssv);
		351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		352	sv_setsv (c->irssv_sv, PL_rs);
		353	}
		354	}
335		355
336	{	356	{
337	dSP;	357	dSP;
338	CV *cv;	358	CV *cv;
339		359
340	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
341	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
342	{	362	{
343	AV *padlist = (AV *)POPs;
344
345	if (padlist)
346	{
347	put_padlist (cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
348	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
349	}	365	CvPADLIST (cv) = (AV *)POPs;
350
351	++CvDEPTH(cv);
352	}	366	}
353		367
354	PUTBACK;	368	PUTBACK;
355	}	369	}
		370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
356	}	371	}
357		372
358	static void	373	static void
359	save_state(Coro__State c, int flags)	374	save_perl (Coro__State c)
360	{	375	{
		376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
361	{	377	{
362	dSP;	378	dSP;
363	I32 cxix = cxstack_ix;	379	I32 cxix = cxstack_ix;
364	PERL_CONTEXT *ccstk = cxstack;	380	PERL_CONTEXT *ccstk = cxstack;
365	PERL_SI *top_si = PL_curstackinfo;	381	PERL_SI *top_si = PL_curstackinfo;
…		…
367	/*	383	/*
368	* the worst thing you can imagine happens first - we have to save	384	* the worst thing you can imagine happens first - we have to save
369	* (and reinitialize) all cv's in the whole callchain :(	385	* (and reinitialize) all cv's in the whole callchain :(
370	*/	386	*/
371		387
		388	EXTEND (SP, 3 + 1);
372	PUSHs (Nullsv);	389	PUSHs (Nullsv);
373	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
374	for (;;)	391	for (;;)
375	{	392	{
376	while (cxix >= 0)	393	while (cxix >= 0)
377	{	394	{
378	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
379		396
380	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE (cx) == CXt_SUB)
381	{	398	{
382	CV *cv = cx->blk_sub.cv;	399	CV *cv = cx->blk_sub.cv;
		400
383	if (CvDEPTH(cv))	401	if (CvDEPTH (cv))
384	{	402	{
385	EXTEND (SP, CvDEPTH(cv)*2);	403	EXTEND (SP, 3);
386
387	while (--CvDEPTH(cv))
388	{
389	/* this tells the restore code to increment CvDEPTH */
390	PUSHs (Nullsv);
391	PUSHs ((SV *)cv);
392	}
393
394	PUSHs ((SV *)CvPADLIST(cv));	404	PUSHs ((SV *)CvPADLIST (cv));
		405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395	PUSHs ((SV *)cv);	406	PUSHs ((SV *)cv);
396		407
		408	CvDEPTH (cv) = 0;
397	get_padlist (cv);	409	get_padlist (cv);
398	}	410	}
399	}	411	}
400	#ifdef CXt_FORMAT
401	else if (CxTYPE(cx) == CXt_FORMAT)
402	{
403	/* I never used formats, so how should I know how these are implemented? */
404	/* my bold guess is as a simple, plain sub... */
405	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
406	}
407	#endif
408	}	412	}
409		413
410	if (top_si->si_type == PERLSI_MAIN)	414	if (top_si->si_type == PERLSI_MAIN)
411	break;	415	break;
412		416
…		…
416	}	420	}
417		421
418	PUTBACK;	422	PUTBACK;
419	}	423	}
420		424
421	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
422	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
423	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
424		429
425	c->dowarn = PL_dowarn;	430	#define VAR(name,type)c->name = PL_ ## name;
426	c->in_eval = PL_in_eval;	431	# include "state.h"
427		432	#undef VAR
428	c->curstackinfo = PL_curstackinfo;
429	c->curstack = PL_curstack;
430	c->mainstack = PL_mainstack;
431	c->stack_sp = PL_stack_sp;
432	c->op = PL_op;
433	c->curpad = PL_curpad;
434	c->comppad = PL_comppad;
435	c->compcv = PL_compcv;
436	c->stack_base = PL_stack_base;
437	c->stack_max = PL_stack_max;
438	c->tmps_stack = PL_tmps_stack;
439	c->tmps_floor = PL_tmps_floor;
440	c->tmps_ix = PL_tmps_ix;
441	c->tmps_max = PL_tmps_max;
442	c->markstack = PL_markstack;
443	c->markstack_ptr = PL_markstack_ptr;
444	c->markstack_max = PL_markstack_max;
445	c->scopestack = PL_scopestack;
446	c->scopestack_ix = PL_scopestack_ix;
447	c->scopestack_max = PL_scopestack_max;
448	c->savestack = PL_savestack;
449	c->savestack_ix = PL_savestack_ix;
450	c->savestack_max = PL_savestack_max;
451	#if !PERL_VERSION_ATLEAST (5,9,0)
452	c->retstack = PL_retstack;
453	c->retstack_ix = PL_retstack_ix;
454	c->retstack_max = PL_retstack_max;
455	#endif
456	c->curpm = PL_curpm;
457	c->curcop = PL_curcop;
458	}	433	}
459		434
460	/*	435	/*
461	* allocate various perl stacks. This is an exact copy	436	* allocate various perl stacks. This is an exact copy
462	* of perl.c:init_stacks, except that it uses less memory	437	* of perl.c:init_stacks, except that it uses less memory
463	* on the (sometimes correct) assumption that coroutines do	438	* on the (sometimes correct) assumption that coroutines do
464	* not usually need a lot of stackspace.	439	* not usually need a lot of stackspace.
465	*/	440	*/
		441	#if CORO_PREFER_PERL_FUNCTIONS
		442	# define coro_init_stacks init_stacks
		443	#else
466	static void	444	static void
467	coro_init_stacks ()	445	coro_init_stacks ()
468	{	446	{
469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
470	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473		451
474	PL_stack_base = AvARRAY(PL_curstack);	452	PL_stack_base = AvARRAY(PL_curstack);
475	PL_stack_sp = PL_stack_base;	453	PL_stack_sp = PL_stack_base;
476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477		455
478	New(50,PL_tmps_stack,96,SV*);	456	New(50,PL_tmps_stack,128,SV*);
479	PL_tmps_floor = -1;	457	PL_tmps_floor = -1;
480	PL_tmps_ix = -1;	458	PL_tmps_ix = -1;
481	PL_tmps_max = 96;	459	PL_tmps_max = 128;
482		460
483	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,32,I32);
484	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 32;
486		464
487	#ifdef SET_MARK_OFFSET	465	#ifdef SET_MARK_OFFSET
488	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
489	#endif	467	#endif
490		468
491	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,32,I32);
492	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
493	PL_scopestack_max = 16;	471	PL_scopestack_max = 32;
494		472
495	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,64,ANY);
496	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
497	PL_savestack_max = 96;	475	PL_savestack_max = 64;
498		476
499	#if !PERL_VERSION_ATLEAST (5,9,0)	477	#if !PERL_VERSION_ATLEAST (5,9,0)
500	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,16,OP*);
501	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
502	PL_retstack_max = 8;	480	PL_retstack_max = 16;
503	#endif	481	#endif
504	}	482	}
		483	#endif
505		484
506	/*	485	/*
507	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
508	*/	487	*/
509	static void	488	static void
510	coro_destroy_stacks ()	489	coro_destroy_stacks ()
511	{	490	{
512	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
513	{	492	{
514	/* is this ugly, I ask? */	493	/* restore all saved variables and stuff */
515	LEAVE_SCOPE (0);	494	LEAVE_SCOPE (0);
		495	assert (PL_tmps_floor == -1);
516		496
517	/* sure it is, but more important: is it correct?? :/ */	497	/* free all temporaries */
518	FREETMPS;	498	FREETMPS;
		499	assert (PL_tmps_ix == -1);
519		500
		501	/* unwind all extra stacks */
520	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	502	POPSTACK_TO (PL_mainstack);
		503
		504	/* unwind main stack */
		505	dounwind (-1);
521	}	506	}
522		507
523	while (PL_curstackinfo->si_next)	508	while (PL_curstackinfo->si_next)
524	PL_curstackinfo = PL_curstackinfo->si_next;	509	PL_curstackinfo = PL_curstackinfo->si_next;
525		510
526	while (PL_curstackinfo)	511	while (PL_curstackinfo)
527	{	512	{
528	PERL_SI *p = PL_curstackinfo->si_prev;	513	PERL_SI *p = PL_curstackinfo->si_prev;
529		514
530	{ /*D*//*remove*/
531	dSP;
532	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
533	PUTBACK; /* possibly superfluous */
534	}
535
536	if (!IN_DESTRUCT)	515	if (!IN_DESTRUCT)
537	{
538	dounwind (-1);/*D*//*remove*/
539	SvREFCNT_dec (PL_curstackinfo->si_stack);	516	SvREFCNT_dec (PL_curstackinfo->si_stack);
540	}
541		517
542	Safefree (PL_curstackinfo->si_cxstack);	518	Safefree (PL_curstackinfo->si_cxstack);
543	Safefree (PL_curstackinfo);	519	Safefree (PL_curstackinfo);
544	PL_curstackinfo = p;	520	PL_curstackinfo = p;
545	}	521	}
…		…
551	#if !PERL_VERSION_ATLEAST (5,9,0)	527	#if !PERL_VERSION_ATLEAST (5,9,0)
552	Safefree (PL_retstack);	528	Safefree (PL_retstack);
553	#endif	529	#endif
554	}	530	}
555		531
		532	/** coroutine stack handling ************************************************/
		533
556	static void	534	static void
557	setup_coro (struct coro *coro)	535	setup_coro (struct coro *coro)
558	{	536	{
559	/*	537	/*
560	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
561	*/	539	*/
562		540
563	coro_init_stacks ();	541	coro_init_stacks ();
564		542
		543	PL_curcop = &PL_compiling;
		544	PL_in_eval = EVAL_NULL;
565	PL_curcop = 0;	545	PL_comppad = 0;
566	PL_in_eval = 0;
567	PL_curpm = 0;	546	PL_curpm = 0;
		547	PL_localizing = 0;
		548	PL_dirty = 0;
		549	PL_restartop = 0;
568		550
569	{	551	{
570	dSP;	552	dSP;
571	LOGOP myop;	553	LOGOP myop;
572		554
573	/* I have no idea why this is needed, but it is */
574	PUSHMARK (SP);
575
576	SvREFCNT_dec (GvAV (PL_defgv));	555	SvREFCNT_dec (GvAV (PL_defgv));
577	GvAV (PL_defgv) = coro->args; coro->args = 0;	556	GvAV (PL_defgv) = coro->args; coro->args = 0;
578		557
579	Zero (&myop, 1, LOGOP);	558	Zero (&myop, 1, LOGOP);
580	myop.op_next = Nullop;	559	myop.op_next = Nullop;
581	myop.op_flags = OPf_WANT_VOID;	560	myop.op_flags = OPf_WANT_VOID;
582		561
583	PL_op = (OP *)&myop;
584
585	PUSHMARK (SP);	562	PUSHMARK (SP);
586	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
587	PUTBACK;	564	PUTBACK;
		565	PL_op = (OP *)&myop;
588	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
589	SPAGAIN;	567	SPAGAIN;
590
591	ENTER; /* necessary e.g. for dounwind */
592	}	568	}
		569
		570	ENTER; /* necessary e.g. for dounwind */
593	}	571	}
594		572
595	static void	573	static void
596	free_coro_mortal ()	574	free_coro_mortal ()
597	{	575	{
…		…
600	SvREFCNT_dec (coro_mortal);	578	SvREFCNT_dec (coro_mortal);
601	coro_mortal = 0;	579	coro_mortal = 0;
602	}	580	}
603	}	581	}
604		582
		583	/* inject a fake call to Coro::State::_cctx_init into the execution */
605	static void NOINLINE	584	static void NOINLINE
606	prepare_cctx (coro_cctx *cctx)	585	prepare_cctx (coro_cctx *cctx)
607	{	586	{
608	dSP;	587	dSP;
609	LOGOP myop;	588	LOGOP myop;
610		589
611	Zero (&myop, 1, LOGOP);	590	Zero (&myop, 1, LOGOP);
612	myop.op_next = PL_op;	591	myop.op_next = PL_op;
613	myop.op_flags = OPf_WANT_VOID;	592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
614
615	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
616		593
617	PUSHMARK (SP);	594	PUSHMARK (SP);
		595	EXTEND (SP, 2);
		596	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
618	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	597	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
619	PUTBACK;	598	PUTBACK;
		599	PL_op = (OP *)&myop;
620	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
621	SPAGAIN;	601	SPAGAIN;
622	}	602	}
623		603
624	static void	604	static void
625	coro_run (void *arg)	605	coro_run (void *arg)
626	{	606	{
627	/* coro_run is the alternative epilogue of transfer() */	607	/* coro_run is the alternative tail of transfer(), so unlock here. */
628	UNLOCK;	608	UNLOCK;
629		609
630	/*	610	/*
631	* this is a _very_ stripped down perl interpreter ;)	611	* this is a _very_ stripped down perl interpreter ;)
632	*/	612	*/
…		…
634		614
635	/* inject call to cctx_init */	615	/* inject call to cctx_init */
636	prepare_cctx ((coro_cctx *)arg);	616	prepare_cctx ((coro_cctx *)arg);
637		617
638	/* somebody will hit me for both perl_run and PL_restartop */	618	/* somebody will hit me for both perl_run and PL_restartop */
		619	PL_restartop = PL_op;
639	perl_run (PL_curinterp);	620	perl_run (PL_curinterp);
640		621
641	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
642	abort ();	623	abort ();
643	}	624	}
644		625
645	static coro_cctx *	626	static coro_cctx *
646	cctx_new ()	627	cctx_new ()
647	{	628	{
648	coro_cctx *cctx;	629	coro_cctx *cctx;
		630	void *stack_start;
		631	size_t stack_size;
649		632
650	++cctx_count;	633	++cctx_count;
651		634
652	New (0, cctx, 1, coro_cctx);	635	Newz (0, cctx, 1, coro_cctx);
653		636
654	#if HAVE_MMAP	637	#if HAVE_MMAP
655		638
656	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	639	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
657	/* mmap suppsedly does allocate-on-write for us */	640	/* mmap supposedly does allocate-on-write for us */
658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	641	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659		642
660	if (cctx->sptr == (void *)-1)	643	if (cctx->sptr != (void *)-1)
661	{
662	perror ("FATAL: unable to mmap stack for coroutine");
663	_exit (EXIT_FAILURE);
664	}	644	{
665
666	# if STACKGUARD	645	# if CORO_STACKGUARD
667	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	646	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
668	# endif	647	# endif
		648	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		649	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		650	cctx->mapped = 1;
		651	}
		652	else
		653	#endif
		654	{
		655	cctx->ssize = coro_stacksize * (long)sizeof (long);
		656	New (0, cctx->sptr, coro_stacksize, long);
669		657
670	#else
671
672	cctx->ssize = STACKSIZE * (long)sizeof (long);
673	New (0, cctx->sptr, STACKSIZE, long);
674
675	if (!cctx->sptr)	658	if (!cctx->sptr)
676	{	659	{
677	perror ("FATAL: unable to malloc stack for coroutine");	660	perror ("FATAL: unable to allocate stack for coroutine");
678	_exit (EXIT_FAILURE);	661	_exit (EXIT_FAILURE);
679	}	662	}
680		663
681	#endif	664	stack_start = cctx->sptr;
		665	stack_size = cctx->ssize;
		666	}
682		667
683	#if USE_VALGRIND	668	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
684	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
685	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
686	cctx->ssize + (char *)cctx->sptr
687	);
688	#endif
689
690	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	669	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
691		670
692	return cctx;	671	return cctx;
693	}	672	}
694		673
695	static void	674	static void
696	cctx_free (coro_cctx *cctx)	675	cctx_destroy (coro_cctx *cctx)
697	{	676	{
698	if (!cctx)	677	if (!cctx)
699	return;	678	return;
700		679
701	--cctx_count;	680	--cctx_count;
702		681
703	#if USE_VALGRIND	682	#if CORO_USE_VALGRIND
704	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	683	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
705	#endif	684	#endif
706		685
707	#if HAVE_MMAP	686	#if HAVE_MMAP
		687	if (cctx->mapped)
708	munmap (cctx->sptr, cctx->ssize);	688	munmap (cctx->sptr, cctx->ssize);
709	#else	689	else
		690	#endif
710	Safefree (cctx->sptr);	691	Safefree (cctx->sptr);
711	#endif
712		692
713	Safefree (cctx);	693	Safefree (cctx);
714	}	694	}
715		695
716	static coro_cctx *	696	static coro_cctx *
717	cctx_get ()	697	cctx_get ()
718	{	698	{
719	coro_cctx *cctx;
720
721	if (cctx_first)	699	while (cctx_first)
722	{	700	{
		701	coro_cctx *cctx = cctx_first;
		702	cctx_first = cctx->next;
723	--cctx_idle;	703	--cctx_idle;
724	cctx = cctx_first;	704
725	cctx_first = cctx->next;	705	if (cctx->ssize >= coro_stacksize)
		706	return cctx;
		707
		708	cctx_destroy (cctx);
726	}	709	}
727	else	710
728	{
729	cctx = cctx_new ();
730	PL_op = PL_op->op_next;	711	PL_op = PL_op->op_next;
731	}
732
733	return cctx;	712	return cctx_new ();
734	}	713	}
735		714
736	static void	715	static void
737	cctx_put (coro_cctx *cctx)	716	cctx_put (coro_cctx *cctx)
738	{	717	{
		718	/* free another cctx if overlimit */
		719	if (cctx_idle >= MAX_IDLE_CCTX)
		720	{
		721	coro_cctx *first = cctx_first;
		722	cctx_first = first->next;
		723	--cctx_idle;
		724
		725	assert (!first->inuse);
		726	cctx_destroy (first);
		727	}
		728
739	++cctx_idle;	729	++cctx_idle;
740	cctx->next = cctx_first;	730	cctx->next = cctx_first;
741	cctx_first = cctx;	731	cctx_first = cctx;
742	}	732	}
743		733
		734	/** coroutine switching *****************************************************/
		735
744	/* never call directly, always through the coro_state_transfer global variable */	736	/* never call directly, always through the coro_state_transfer global variable */
745	static void NOINLINE	737	static void NOINLINE
746	transfer (struct coro *prev, struct coro *next, int flags)	738	transfer (struct coro *prev, struct coro *next)
747	{	739	{
748	dSTACKLEVEL;	740	dSTACKLEVEL;
749		741
750	/* sometimes transfer is only called to set idle_sp */	742	/* sometimes transfer is only called to set idle_sp */
751	if (flags == TRANSFER_SET_STACKLEVEL)	743	if (!next)
		744	{
752	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	745	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		746	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		747	}
753	else if (prev != next)	748	else if (prev != next)
754	{	749	{
755	coro_cctx *prev__cctx;	750	coro_cctx *prev__cctx;
756		751
		752	if (prev->flags & CF_NEW)
		753	{
		754	/* create a new empty context */
		755	Newz (0, prev->cctx, 1, coro_cctx);
		756	prev->cctx->inuse = 1;
		757	prev->flags &= ~CF_NEW;
		758	prev->flags |= CF_RUNNING;
		759	}
		760
		761	/*TODO: must not croak here */
		762	if (!prev->flags & CF_RUNNING)
		763	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		764
		765	if (next->flags & CF_RUNNING)
		766	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		767
		768	if (next->flags & CF_DESTROYED)
		769	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		770
		771	prev->flags &= ~CF_RUNNING;
		772	next->flags |= CF_RUNNING;
		773
757	LOCK;	774	LOCK;
758		775
759	if (next->mainstack)	776	if (next->flags & CF_NEW)
760	{	777	{
761	/* coroutine already started */	778	/* need to start coroutine */
762	SAVE (prev, flags);	779	next->flags &= ~CF_NEW;
763	LOAD (next);	780	/* first get rid of the old state */
		781	save_perl (prev);
		782	/* setup coroutine call */
		783	setup_coro (next);
		784	/* need a new stack */
		785	assert (!next->cctx);
764	}	786	}
765	else	787	else
766	{	788	{
767	/* need to start coroutine */	789	/* coroutine already started */
768	/* first get rid of the old state */	790	save_perl (prev);
769	SAVE (prev, -1);	791	load_perl (next);
770	/* setup coroutine call */
771	setup_coro (next);
772	/* need a stack */
773	next->cctx = 0;
774	}	792	}
775
776	if (!prev->cctx)
777	/* create a new empty context */
778	Newz (0, prev->cctx, 1, coro_cctx);
779		793
780	prev__cctx = prev->cctx;	794	prev__cctx = prev->cctx;
781		795
782	/* possibly "free" the cctx */	796	/* possibly "free" the cctx */
783	if (prev__cctx->idle_sp == STACKLEVEL)	797	if (prev__cctx->idle_sp == STACKLEVEL)
784	{	798	{
		799	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		800	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		801
		802	prev->cctx = 0;
		803
785	cctx_put (prev__cctx);	804	cctx_put (prev__cctx);
786	prev->cctx = 0;	805	prev__cctx->inuse = 0;
787	}	806	}
788		807
789	if (!next->cctx)	808	if (!next->cctx)
		809	{
790	next->cctx = cctx_get ();	810	next->cctx = cctx_get ();
		811	assert (!next->cctx->inuse);
		812	next->cctx->inuse = 1;
		813	}
791		814
792	if (prev__cctx != next->cctx)	815	if (prev__cctx != next->cctx)
793	{	816	{
794	prev__cctx->top_env = PL_top_env;	817	prev__cctx->top_env = PL_top_env;
795	PL_top_env = next->cctx->top_env;	818	PL_top_env = next->cctx->top_env;
796	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	819	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
797	}	820	}
798		821
799	free_coro_mortal ();	822	free_coro_mortal ();
800
801	UNLOCK;	823	UNLOCK;
802	}	824	}
803	}	825	}
804		826
805	struct transfer_args	827	struct transfer_args
806	{	828	{
807	struct coro *prev, *next;	829	struct coro *prev, *next;
808	int flags;
809	};	830	};
810		831
811	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	832	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
812		833
		834	/** high level stuff ********************************************************/
		835
813	static void	836	static int
814	coro_state_destroy (struct coro *coro)	837	coro_state_destroy (struct coro *coro)
815	{	838	{
816	if (coro->refcnt--)	839	if (coro->flags & CF_DESTROYED)
817	return;	840	return 0;
		841
		842	coro->flags |= CF_DESTROYED;
		843
		844	if (coro->flags & CF_READY)
		845	{
		846	/* reduce nready, as destroying a ready coro effectively unreadies it */
		847	/* alternative: look through all ready queues and remove the coro */
		848	LOCK;
		849	--coro_nready;
		850	UNLOCK;
		851	}
		852	else
		853	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
818		854
819	if (coro->mainstack && coro->mainstack != main_mainstack)	855	if (coro->mainstack && coro->mainstack != main_mainstack)
820	{	856	{
821	struct coro temp;	857	struct coro temp;
822		858
823	SAVE ((&temp), TRANSFER_SAVE_ALL);	859	assert (!(coro->flags & CF_RUNNING));
824	LOAD (coro);	860
		861	Zero (&temp, 1, struct coro);
		862	temp.save = CORO_SAVE_ALL;
		863
		864	if (coro->flags & CF_RUNNING)
		865	croak ("FATAL: tried to destroy currently running coroutine");
		866
		867	save_perl (&temp);
		868	load_perl (coro);
825		869
826	coro_destroy_stacks ();	870	coro_destroy_stacks ();
827		871
828	LOAD ((&temp)); /* this will get rid of defsv etc.. */	872	load_perl (&temp); /* this will get rid of defsv etc.. */
829		873
830	coro->mainstack = 0;	874	coro->mainstack = 0;
831	}	875	}
832		876
833	cctx_free (coro->cctx);	877	cctx_destroy (coro->cctx);
834	SvREFCNT_dec (coro->args);	878	SvREFCNT_dec (coro->args);
835	Safefree (coro);	879
		880	return 1;
836	}	881	}
837		882
838	static int	883	static int
839	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	884	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
840	{	885	{
841	struct coro *coro = (struct coro *)mg->mg_ptr;	886	struct coro *coro = (struct coro *)mg->mg_ptr;
842	mg->mg_ptr = 0;	887	mg->mg_ptr = 0;
843		888
		889	if (--coro->refcnt < 0)
		890	{
844	coro_state_destroy (coro);	891	coro_state_destroy (coro);
		892	Safefree (coro);
		893	}
845		894
846	return 0;	895	return 0;
847	}	896	}
848		897
849	static int	898	static int
…		…
856	return 0;	905	return 0;
857	}	906	}
858		907
859	static MGVTBL coro_state_vtbl = {	908	static MGVTBL coro_state_vtbl = {
860	0, 0, 0, 0,	909	0, 0, 0, 0,
861	coro_state_clear,	910	coro_state_free,
862	0,	911	0,
863	#ifdef MGf_DUP	912	#ifdef MGf_DUP
864	coro_state_dup,	913	coro_state_dup,
865	#else	914	#else
866	# define MGf_DUP 0	915	# define MGf_DUP 0
…		…
882	/* very slow, but rare, check */	931	/* very slow, but rare, check */
883	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	932	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
884	croak ("Coro::State object required");	933	croak ("Coro::State object required");
885	}	934	}
886		935
887	mg = SvMAGIC (coro);	936	mg = CORO_MAGIC (coro);
888	assert (mg->mg_type == PERL_MAGIC_ext);
889	return (struct coro *)mg->mg_ptr;	937	return (struct coro *)mg->mg_ptr;
890	}	938	}
891		939
892	static void	940	static void
893	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	941	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
894	{	942	{
895	ta->prev = SvSTATE (prev);	943	ta->prev = SvSTATE (prev_sv);
896	ta->next = SvSTATE (next);	944	ta->next = SvSTATE (next_sv);
897	ta->flags = flags;
898	}	945	}
899		946
900	static void	947	static void
901	api_transfer (SV *prev, SV *next, int flags)	948	api_transfer (SV *prev_sv, SV *next_sv)
902	{	949	{
903	dTHX;
904	struct transfer_args ta;	950	struct transfer_args ta;
905		951
906	prepare_transfer (&ta, prev, next, flags);	952	prepare_transfer (&ta, prev_sv, next_sv);
907	TRANSFER (ta);	953	TRANSFER (ta);
908	}	954	}
909		955
		956	static int
		957	api_save (SV *coro_sv, int new_save)
		958	{
		959	struct coro *coro = SvSTATE (coro_sv);
		960	int old_save = coro->save;
		961
		962	if (new_save >= 0)
		963	coro->save = new_save;
		964
		965	return old_save;
		966	}
		967
910	/** Coro ********************************************************************/	968	/** Coro ********************************************************************/
911		969
912	#define PRIO_MAX 3
913	#define PRIO_HIGH 1
914	#define PRIO_NORMAL 0
915	#define PRIO_LOW -1
916	#define PRIO_IDLE -3
917	#define PRIO_MIN -4
918
919	/* for Coro.pm */
920	static GV *coro_current, *coro_idle;
921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
922	static int coro_nready;
923
924	static void	970	static void
925	coro_enq (SV *sv)	971	coro_enq (SV *coro_sv)
926	{	972	{
927	int prio;
928
929	if (SvTYPE (sv) != SVt_PVHV)
930	croak ("Coro::ready tried to enqueue something that is not a coroutine");
931
932	prio = SvSTATE (sv)->prio;
933
934	av_push (coro_ready [prio - PRIO_MIN], sv);	973	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
935	coro_nready++;
936	}	974	}
937		975
938	static SV *	976	static SV *
939	coro_deq (int min_prio)	977	coro_deq (int min_prio)
940	{	978	{
…		…
944	if (min_prio < 0)	982	if (min_prio < 0)
945	min_prio = 0;	983	min_prio = 0;
946		984
947	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	985	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
948	if (AvFILLp (coro_ready [prio]) >= 0)	986	if (AvFILLp (coro_ready [prio]) >= 0)
949	{
950	coro_nready--;
951	return av_shift (coro_ready [prio]);	987	return av_shift (coro_ready [prio]);
952	}
953		988
954	return 0;	989	return 0;
955	}	990	}
956		991
957	static void	992	static int
958	api_ready (SV *coro)	993	api_ready (SV *coro_sv)
959	{	994	{
960	dTHX;	995	struct coro *coro;
961		996
962	if (SvROK (coro))	997	if (SvROK (coro_sv))
963	coro = SvRV (coro);	998	coro_sv = SvRV (coro_sv);
		999
		1000	coro = SvSTATE (coro_sv);
		1001
		1002	if (coro->flags & CF_READY)
		1003	return 0;
		1004
		1005	coro->flags |= CF_READY;
964		1006
965	LOCK;	1007	LOCK;
966	coro_enq (SvREFCNT_inc (coro));	1008	coro_enq (SvREFCNT_inc (coro_sv));
		1009	++coro_nready;
967	UNLOCK;	1010	UNLOCK;
		1011
		1012	return 1;
		1013	}
		1014
		1015	static int
		1016	api_is_ready (SV *coro_sv)
		1017	{
		1018	return !!(SvSTATE (coro_sv)->flags & CF_READY);
968	}	1019	}
969		1020
970	static void	1021	static void
971	prepare_schedule (struct transfer_args *ta)	1022	prepare_schedule (struct transfer_args *ta)
972	{	1023	{
973	SV *current, *prev, *next;	1024	SV *prev_sv, *next_sv;
974
975	current = GvSV (coro_current);
976		1025
977	for (;;)	1026	for (;;)
978	{	1027	{
979	LOCK;	1028	LOCK;
980	next = coro_deq (PRIO_MIN);	1029	next_sv = coro_deq (PRIO_MIN);
		1030
		1031	/* nothing to schedule: call the idle handler */
		1032	if (!next_sv)
		1033	{
		1034	dSP;
		1035	UNLOCK;
		1036
		1037	ENTER;
		1038	SAVETMPS;
		1039
		1040	PUSHMARK (SP);
		1041	PUTBACK;
		1042	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1043
		1044	FREETMPS;
		1045	LEAVE;
		1046	continue;
		1047	}
		1048
		1049	ta->next = SvSTATE (next_sv);
		1050
		1051	/* cannot transfer to destroyed coros, skip and look for next */
		1052	if (ta->next->flags & CF_DESTROYED)
		1053	{
		1054	UNLOCK;
		1055	SvREFCNT_dec (next_sv);
		1056	/* coro_nready is already taken care of by destroy */
		1057	continue;
		1058	}
		1059
		1060	--coro_nready;
981	UNLOCK;	1061	UNLOCK;
982
983	if (next)
984	break;	1062	break;
985
986	{
987	dSP;
988
989	ENTER;
990	SAVETMPS;
991
992	PUSHMARK (SP);
993	PUTBACK;
994	call_sv (GvSV (coro_idle), G_DISCARD);
995
996	FREETMPS;
997	LEAVE;
998	}	1063	}
999	}
1000
1001	prev = SvRV (current);
1002	SvRV (current) = next;
1003		1064
1004	/* free this only after the transfer */	1065	/* free this only after the transfer */
		1066	prev_sv = SvRV (coro_current);
		1067	SvRV_set (coro_current, next_sv);
		1068	ta->prev = SvSTATE (prev_sv);
		1069
		1070	assert (ta->next->flags & CF_READY);
		1071	ta->next->flags &= ~CF_READY;
		1072
1005	LOCK;	1073	LOCK;
1006	free_coro_mortal ();	1074	free_coro_mortal ();
		1075	coro_mortal = prev_sv;
1007	UNLOCK;	1076	UNLOCK;
1008	coro_mortal = prev;
1009
1010	ta->prev = SvSTATE (prev);
1011	ta->next = SvSTATE (next);
1012	ta->flags = TRANSFER_SAVE_ALL;
1013	}	1077	}
1014		1078
1015	static void	1079	static void
1016	prepare_cede (struct transfer_args *ta)	1080	prepare_cede (struct transfer_args *ta)
1017	{	1081	{
1018	LOCK;	1082	api_ready (coro_current);
1019	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1020	UNLOCK;
1021
1022	prepare_schedule (ta);	1083	prepare_schedule (ta);
1023	}	1084	}
1024		1085
		1086	static int
		1087	prepare_cede_notself (struct transfer_args *ta)
		1088	{
		1089	if (coro_nready)
		1090	{
		1091	SV *prev = SvRV (coro_current);
		1092	prepare_schedule (ta);
		1093	api_ready (prev);
		1094	return 1;
		1095	}
		1096	else
		1097	return 0;
		1098	}
		1099
1025	static void	1100	static void
1026	api_schedule (void)	1101	api_schedule (void)
1027	{	1102	{
1028	dTHX;
1029	struct transfer_args ta;	1103	struct transfer_args ta;
1030		1104
1031	prepare_schedule (&ta);	1105	prepare_schedule (&ta);
1032	TRANSFER (ta);	1106	TRANSFER (ta);
1033	}	1107	}
1034		1108
1035	static void	1109	static int
1036	api_cede (void)	1110	api_cede (void)
1037	{	1111	{
1038	dTHX;
1039	struct transfer_args ta;	1112	struct transfer_args ta;
1040		1113
1041	prepare_cede (&ta);	1114	prepare_cede (&ta);
		1115
		1116	if (ta.prev != ta.next)
		1117	{
1042	TRANSFER (ta);	1118	TRANSFER (ta);
		1119	return 1;
		1120	}
		1121	else
		1122	return 0;
		1123	}
		1124
		1125	static int
		1126	api_cede_notself (void)
		1127	{
		1128	struct transfer_args ta;
		1129
		1130	if (prepare_cede_notself (&ta))
		1131	{
		1132	TRANSFER (ta);
		1133	return 1;
		1134	}
		1135	else
		1136	return 0;
1043	}	1137	}
1044		1138
1045	MODULE = Coro::State PACKAGE = Coro::State	1139	MODULE = Coro::State PACKAGE = Coro::State
1046		1140
1047	PROTOTYPES: DISABLE	1141	PROTOTYPES: DISABLE
…		…
1053	#endif	1147	#endif
1054	BOOT_PAGESIZE;	1148	BOOT_PAGESIZE;
1055		1149
1056	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1150	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1057		1151
1058	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1152	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1059	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1153	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1060	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1154	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1155	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1156	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1061		1157
1062	main_mainstack = PL_mainstack;	1158	main_mainstack = PL_mainstack;
1063		1159
1064	coroapi.ver = CORO_API_VERSION;	1160	coroapi.ver = CORO_API_VERSION;
1065	coroapi.transfer = api_transfer;	1161	coroapi.transfer = api_transfer;
…		…
1075	HV *hv;	1171	HV *hv;
1076	int i;	1172	int i;
1077		1173
1078	Newz (0, coro, 1, struct coro);	1174	Newz (0, coro, 1, struct coro);
1079	coro->args = newAV ();	1175	coro->args = newAV ();
		1176	coro->save = CORO_SAVE_ALL;
		1177	coro->flags = CF_NEW;
1080		1178
1081	hv = newHV ();	1179	hv = newHV ();
1082	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1180	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1083	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1181	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1084		1182
1085	for (i = 1; i < items; i++)	1183	for (i = 1; i < items; i++)
1086	av_push (coro->args, newSVsv (ST (i)));	1184	av_push (coro->args, newSVsv (ST (i)));
1087	}	1185	}
1088	OUTPUT:	1186	OUTPUT:
		1187	RETVAL
		1188
		1189	int
		1190	save (SV *coro, int new_save = -1)
		1191	CODE:
		1192	RETVAL = api_save (coro, new_save);
		1193	OUTPUT:
1089	RETVAL	1194	RETVAL
1090		1195
1091	void	1196	void
1092	_set_stacklevel (...)	1197	_set_stacklevel (...)
1093	ALIAS:	1198	ALIAS:
1094	Coro::State::transfer = 1	1199	Coro::State::transfer = 1
1095	Coro::schedule = 2	1200	Coro::schedule = 2
1096	Coro::cede = 3	1201	Coro::cede = 3
1097	Coro::Cont::yield = 4	1202	Coro::cede_notself = 4
1098	CODE:	1203	CODE:
1099	{	1204	{
1100	struct transfer_args ta;	1205	struct transfer_args ta;
1101		1206
1102	switch (ix)	1207	switch (ix)
1103	{	1208	{
1104	case 0:	1209	case 0:
1105	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1210	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1106	ta.next = 0;	1211	ta.next = 0;
1107	ta.flags = TRANSFER_SET_STACKLEVEL;
1108	break;	1212	break;
1109		1213
1110	case 1:	1214	case 1:
1111	if (items != 3)	1215	if (items != 2)
1112	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1216	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1113		1217
1114	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1218	prepare_transfer (&ta, ST (0), ST (1));
1115	break;	1219	break;
1116		1220
1117	case 2:	1221	case 2:
1118	prepare_schedule (&ta);	1222	prepare_schedule (&ta);
1119	break;	1223	break;
…		…
1121	case 3:	1225	case 3:
1122	prepare_cede (&ta);	1226	prepare_cede (&ta);
1123	break;	1227	break;
1124		1228
1125	case 4:	1229	case 4:
1126	{	1230	if (!prepare_cede_notself (&ta))
1127	SV *yieldstack;	1231	XSRETURN_EMPTY;
1128	SV *sv;
1129	AV *defav = GvAV (PL_defgv);
1130		1232
1131	yieldstack = *hv_fetch (
1132	(HV *)SvRV (GvSV (coro_current)),
1133	"yieldstack", sizeof ("yieldstack") - 1,
1134	0
1135	);
1136
1137	/* set up @_ -- ugly */
1138	av_clear (defav);
1139	av_fill (defav, items - 1);
1140	while (items--)
1141	av_store (defav, items, SvREFCNT_inc (ST(items)));
1142
1143	sv = av_pop ((AV *)SvRV (yieldstack));
1144	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1145	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1146	ta.flags = 0;
1147	SvREFCNT_dec (sv);
1148	}
1149	break;	1233	break;
1150
1151	}	1234	}
1152		1235
		1236	BARRIER;
1153	TRANSFER (ta);	1237	TRANSFER (ta);
1154	}
1155		1238
1156	void	1239	if (GIMME_V != G_VOID && ta.next != ta.prev)
1157	_clone_state_from (SV *dst, SV *src)	1240	XSRETURN_YES;
		1241	}
		1242
		1243	bool
		1244	_destroy (SV *coro_sv)
1158	CODE:	1245	CODE:
1159	{	1246	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1160	struct coro *coro_src = SvSTATE (src);	1247	OUTPUT:
1161		1248	RETVAL
1162	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1163
1164	++coro_src->refcnt;
1165	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1166	}
1167		1249
1168	void	1250	void
1169	_exit (code)	1251	_exit (code)
1170	int code	1252	int code
1171	PROTOTYPE: $	1253	PROTOTYPE: $
1172	CODE:	1254	CODE:
1173	_exit (code);	1255	_exit (code);
1174		1256
1175	int	1257	int
		1258	cctx_stacksize (int new_stacksize = 0)
		1259	CODE:
		1260	RETVAL = coro_stacksize;
		1261	if (new_stacksize)
		1262	coro_stacksize = new_stacksize;
		1263	OUTPUT:
		1264	RETVAL
		1265
		1266	int
1176	cctx_count ()	1267	cctx_count ()
1177	CODE:	1268	CODE:
1178	RETVAL = cctx_count;	1269	RETVAL = cctx_count;
1179	OUTPUT:	1270	OUTPUT:
1180	RETVAL	1271	RETVAL
…		…
1199	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1290	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1200	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1291	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1201	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1292	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1202	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1293	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1203		1294
1204	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1295	coro_current = get_sv ("Coro::current", FALSE);
1205	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1296	SvREADONLY_on (coro_current);
1206		1297
1207	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1298	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1208	coro_ready[i] = newAV ();	1299	coro_ready[i] = newAV ();
1209		1300
1210	{	1301	{
1211	SV *sv = perl_get_sv("Coro::API", 1);	1302	SV *sv = perl_get_sv("Coro::API", 1);
1212		1303
1213	coroapi.schedule = api_schedule;	1304	coroapi.schedule = api_schedule;
		1305	coroapi.save = api_save;
1214	coroapi.cede = api_cede;	1306	coroapi.cede = api_cede;
		1307	coroapi.cede_notself = api_cede_notself;
1215	coroapi.ready = api_ready;	1308	coroapi.ready = api_ready;
		1309	coroapi.is_ready = api_is_ready;
1216	coroapi.nready = &coro_nready;	1310	coroapi.nready = &coro_nready;
1217	coroapi.current = coro_current;	1311	coroapi.current = coro_current;
1218		1312
1219	GCoroAPI = &coroapi;	1313	GCoroAPI = &coroapi;
1220	sv_setiv (sv, (IV)&coroapi);	1314	sv_setiv (sv, (IV)&coroapi);
1221	SvREADONLY_on (sv);	1315	SvREADONLY_on (sv);
1222	}	1316	}
1223	}	1317	}
		1318
		1319	void
		1320	_set_current (SV *current)
		1321	PROTOTYPE: $
		1322	CODE:
		1323	SvREFCNT_dec (SvRV (coro_current));
		1324	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1224		1325
1225	int	1326	int
1226	prio (Coro::State coro, int newprio = 0)	1327	prio (Coro::State coro, int newprio = 0)
1227	ALIAS:	1328	ALIAS:
1228	nice = 1	1329	nice = 1
…		…
1231	RETVAL = coro->prio;	1332	RETVAL = coro->prio;
1232		1333
1233	if (items > 1)	1334	if (items > 1)
1234	{	1335	{
1235	if (ix)	1336	if (ix)
1236	newprio += coro->prio;	1337	newprio = coro->prio - newprio;
1237		1338
1238	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1339	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1239	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1340	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1240		1341
1241	coro->prio = newprio;	1342	coro->prio = newprio;
1242	}	1343	}
1243	}	1344	}
		1345	OUTPUT:
		1346	RETVAL
1244		1347
1245	void	1348	SV *
1246	ready (SV *self)	1349	ready (SV *self)
1247	PROTOTYPE: $	1350	PROTOTYPE: $
1248	CODE:	1351	CODE:
1249	api_ready (self);	1352	RETVAL = boolSV (api_ready (self));
		1353	OUTPUT:
		1354	RETVAL
		1355
		1356	SV *
		1357	is_ready (SV *self)
		1358	PROTOTYPE: $
		1359	CODE:
		1360	RETVAL = boolSV (api_is_ready (self));
		1361	OUTPUT:
		1362	RETVAL
1250		1363
1251	int	1364	int
1252	nready (...)	1365	nready (...)
1253	PROTOTYPE:	1366	PROTOTYPE:
1254	CODE:	1367	CODE:
…		…
1260		1373
1261	SV *	1374	SV *
1262	_get_state ()	1375	_get_state ()
1263	CODE:	1376	CODE:
1264	{	1377	{
1265	struct {	1378	struct io_state *data;
1266	int errorno;
1267	int laststype;
1268	int laststatval;
1269	Stat_t statcache;
1270	} data;
1271		1379
		1380	RETVAL = newSV (sizeof (struct io_state));
		1381	data = (struct io_state *)SvPVX (RETVAL);
		1382	SvCUR_set (RETVAL, sizeof (struct io_state));
		1383	SvPOK_only (RETVAL);
		1384
1272	data.errorno = errno;	1385	data->errorno = errno;
1273	data.laststype = PL_laststype;	1386	data->laststype = PL_laststype;
1274	data.laststatval = PL_laststatval;	1387	data->laststatval = PL_laststatval;
1275	data.statcache = PL_statcache;	1388	data->statcache = PL_statcache;
1276
1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
1278	}	1389	}
1279	OUTPUT:	1390	OUTPUT:
1280	RETVAL	1391	RETVAL
1281		1392
1282	void	1393	void
1283	_set_state (char *data_)	1394	_set_state (char *data_)
1284	PROTOTYPE: $	1395	PROTOTYPE: $
1285	CODE:	1396	CODE:
1286	{	1397	{
1287	struct {	1398	struct io_state *data = (void *)data_;
1288	int errorno;
1289	int laststype;
1290	int laststatval;
1291	Stat_t statcache;
1292	} *data = (void *)data_;
1293		1399
1294	errno = data->errorno;	1400	errno = data->errorno;
1295	PL_laststype = data->laststype;	1401	PL_laststype = data->laststype;
1296	PL_laststatval = data->laststatval;	1402	PL_laststatval = data->laststatval;
1297	PL_statcache = data->statcache;	1403	PL_statcache = data->statcache;
1298	}	1404	}
		1405

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