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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.131 by root, Fri Dec 29 11:37:49 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
14	# endif	52	# endif
15	# ifndef call_sv	53	# ifndef call_sv
16	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
29	# endif	67	# endif
30	#endif	68	#endif
31		69
32	#include <stdio.h>	70	/* 5.8.7 */
33	#include <errno.h>	71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
34		74
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	76	# undef STACKGUARD
37	#endif	77	#endif
38		78
39	#ifndef STACKGUARD	79	#ifndef STACKGUARD
40	# define STACKGUARD 0	80	# define STACKGUARD 0
41	#endif	81	#endif
42		82
43	#ifdef HAVE_MMAP	83	/* prefer perl internal functions over our own? */
44	# include <unistd.h>	84	#ifndef PREFER_PERL_FUNCTIONS
45	# include <sys/mman.h>	85	# define PREFER_PERL_FUNCTIONS 0
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif
53	# include <limits.h>
54	# ifndef PAGESIZE
55	# define PAGESIZE pagesize
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif
61	#endif	86	#endif
62		87
63	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
64	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
65	* and should be unique. */	90	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	91	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	92	#define STACKLEVEL ((void *)&stacklevel)
68		93
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		95
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		99	#else
		100	# define attribute(x)
		101	# define BARRIER
		102	#endif
		103
		104	#define NOINLINE attribute ((noinline))
72		105
73	#include "CoroAPI.h"	106	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		107
77	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	112	#else
82	# define LOCK (void)0	113	# define LOCK (void)0
83	# define UNLOCK (void)0	114	# define UNLOCK (void)0
84	#endif	115	#endif
85		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
		124
86	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
87	static AV *main_mainstack; /* used to differentiate between $main and others */	126	static AV *main_mainstack; /* used to differentiate between $main and others */
88	static HV *coro_state_stash, *coro_stash;	127	static HV *coro_state_stash, *coro_stash;
89	static SV *coro_mortal; /* will be freed after next transfer */	128	static SV *coro_mortal; /* will be freed after next transfer */
90		129
		130	static struct coro_cctx *cctx_first;
		131	static int cctx_count, cctx_idle;
		132
91	/* this is a structure representing a c-level coroutine */	133	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	134	typedef struct coro_cctx {
93	struct coro_stack *next;	135	struct coro_cctx *next;
94		136
95	void *idle_sp; /* original stacklevel when coroutine was created */	137	/* the stack */
96	void *sptr;	138	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
98		140
99	/* cpu state */	141	/* cpu state */
		142	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		143	JMPENV *top_env;
100	coro_context cctx;	144	coro_context cctx;
101	JMPENV *top_env;
102	} coro_stack;
103		145
104	/* the (fake) coro_stack representing the main program */	146	int inuse;
105	static coro_stack *main_stack;	147
		148	#if USE_VALGRIND
		149	int valgrind_id;
		150	#endif
		151	} coro_cctx;
		152
		153	enum {
		154	CF_RUNNING = 0x0001, /* coroutine is running */
		155	CF_READY = 0x0002, /* coroutine is ready */
		156	CF_NEW = 0x0004, /* ahs never been switched to */
		157	};
106		158
107	/* this is a structure representing a perl-level coroutine */	159	/* this is a structure representing a perl-level coroutine */
108	struct coro {	160	struct coro {
109	/* the c coroutine allocated to this perl coroutine, if any */	161	/* the c coroutine allocated to this perl coroutine, if any */
110	coro_stack *stack;	162	coro_cctx *cctx;
111		163
112	/* data associated with this coroutine (initial args) */	164	/* data associated with this coroutine (initial args) */
113	AV *args;	165	AV *args;
114	int refcnt;	166	int refcnt;
		167	int save; /* CORO_SAVE flags */
		168	int flags; /* CF_ flags */
115		169
116	/* optionally saved, might be zero */	170	/* optionally saved, might be zero */
117	AV *defav;	171	AV *defav; /* @_ */
118	SV *defsv;	172	SV *defsv; /* $_ */
119	SV *errsv;	173	SV *errsv; /* $@ */
		174	SV *irssv; /* $/ */
		175	SV *irssv_sv; /* real $/ cache */
120		176
121	/* saved global state not related to stacks */	177	#define VAR(name,type) type name;
122	U8 dowarn;	178	# include "state.h"
123	I32 in_eval;	179	#undef VAR
124
125	/* the stacks and related info (callchain etc..) */
126	PERL_SI *curstackinfo;
127	AV *curstack;
128	AV *mainstack;
129	SV **stack_sp;
130	OP *op;
131	SV **curpad;
132	AV *comppad;
133	CV *compcv;
134	SV **stack_base;
135	SV **stack_max;
136	SV **tmps_stack;
137	I32 tmps_floor;
138	I32 tmps_ix;
139	I32 tmps_max;
140	I32 *markstack;
141	I32 *markstack_ptr;
142	I32 *markstack_max;
143	I32 *scopestack;
144	I32 scopestack_ix;
145	I32 scopestack_max;
146	ANY *savestack;
147	I32 savestack_ix;
148	I32 savestack_max;
149	OP **retstack;
150	I32 retstack_ix;
151	I32 retstack_max;
152	PMOP *curpm;
153	COP *curcop;
154		180
155	/* coro process data */	181	/* coro process data */
156	int prio;	182	int prio;
157	};	183	};
158		184
159	typedef struct coro *Coro__State;	185	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	186	typedef struct coro *Coro__State_or_hashref;
161		187
162	static AV *	188	static AV *
163	coro_clone_padlist (pTHX_ CV *cv)	189	coro_clone_padlist (CV *cv)
164	{	190	{
165	AV *padlist = CvPADLIST (cv);	191	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	192	AV *newpadlist, *newpad;
167		193
168	newpadlist = newAV ();	194	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	195	AvREAL_off (newpadlist);
170	#if PERL_VERSION < 9	196	#if PERL_VERSION_ATLEAST (5,9,0)
		197	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		198	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	199	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
172	#else
173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174	#endif	200	#endif
175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	201	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176	--AvFILLp (padlist);	202	--AvFILLp (padlist);
177		203
178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	204	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
180		206
181	return newpadlist;	207	return newpadlist;
182	}	208	}
183		209
184	static void	210	static void
185	free_padlist (pTHX_ AV *padlist)	211	free_padlist (AV *padlist)
186	{	212	{
187	/* may be during global destruction */	213	/* may be during global destruction */
188	if (SvREFCNT (padlist))	214	if (SvREFCNT (padlist))
189	{	215	{
190	I32 i = AvFILLp (padlist);	216	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	237	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	238	AV *av = (AV *)mg->mg_obj;
213		239
214	/* casting is fun. */	240	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	241	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (aTHX_ padlist);	242	free_padlist (padlist);
217		243
218	SvREFCNT_dec (av);	244	SvREFCNT_dec (av);
219		245
220	return 0;	246	return 0;
221	}	247	}
222		248
223	#define PERL_MAGIC_coro PERL_MAGIC_ext	249	#define PERL_MAGIC_coro PERL_MAGIC_ext
224		250
225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	251	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
226		252
		253	#define CORO_MAGIC(cv) \
		254	SvMAGIC (cv) \
		255	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		256	? SvMAGIC (cv) \
		257	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		258	: 0
		259
227	/* the next two functions merely cache the padlists */	260	/* the next two functions merely cache the padlists */
228	static void	261	static void
229	get_padlist (pTHX_ CV *cv)	262	get_padlist (CV *cv)
230	{	263	{
231	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	264	MAGIC *mg = CORO_MAGIC (cv);
		265	AV *av;
232		266
233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	267	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	268	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	269	else
236	{	270	{
237	#if 0	271	#if PREFER_PERL_FUNCTIONS
238	/* this should work - but it doesn't :( */	272	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (aTHX_ cv);	273	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	274	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	275	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	276	SvREFCNT_dec (cp);
243	#else	277	#else
244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	278	CvPADLIST (cv) = coro_clone_padlist (cv);
245	#endif	279	#endif
246	}	280	}
247	}	281	}
248		282
249	static void	283	static void
250	put_padlist (pTHX_ CV *cv)	284	put_padlist (CV *cv)
251	{	285	{
252	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
253		288
254	if (!mg)	289	if (!mg)
255	{	290	{
256	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	291	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
257	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	292	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
258	mg->mg_virtual = &vtbl_coro;	293	mg->mg_virtual = &vtbl_coro;
259	mg->mg_obj = (SV *)newAV ();	294	mg->mg_obj = (SV *)newAV ();
260	}	295	}
261		296
262	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	297	av = (AV *)mg->mg_obj;
		298
		299	if (AvFILLp (av) >= AvMAX (av))
		300	av_extend (av, AvMAX (av) + 1);
		301
		302	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263	}	303	}
264		304
265	#define SB do {	305	#define SB do {
266	#define SE } while (0)	306	#define SE } while (0)
267		307
268	#define LOAD(state) load_state(aTHX_ (state));
269	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
270
271	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
272		309
273	static void	310	static void
274	load_state(pTHX_ Coro__State c)	311	load_perl (Coro__State c)
275	{	312	{
276	PL_dowarn = c->dowarn;	313	#define VAR(name,type) PL_ ## name = c->name;
277	PL_in_eval = c->in_eval;	314	# include "state.h"
278		315	#undef VAR
279	PL_curstackinfo = c->curstackinfo;
280	PL_curstack = c->curstack;
281	PL_mainstack = c->mainstack;
282	PL_stack_sp = c->stack_sp;
283	PL_op = c->op;
284	PL_curpad = c->curpad;
285	PL_comppad = c->comppad;
286	PL_compcv = c->compcv;
287	PL_stack_base = c->stack_base;
288	PL_stack_max = c->stack_max;
289	PL_tmps_stack = c->tmps_stack;
290	PL_tmps_floor = c->tmps_floor;
291	PL_tmps_ix = c->tmps_ix;
292	PL_tmps_max = c->tmps_max;
293	PL_markstack = c->markstack;
294	PL_markstack_ptr = c->markstack_ptr;
295	PL_markstack_max = c->markstack_max;
296	PL_scopestack = c->scopestack;
297	PL_scopestack_ix = c->scopestack_ix;
298	PL_scopestack_max = c->scopestack_max;
299	PL_savestack = c->savestack;
300	PL_savestack_ix = c->savestack_ix;
301	PL_savestack_max = c->savestack_max;
302	#if PERL_VERSION < 9
303	PL_retstack = c->retstack;
304	PL_retstack_ix = c->retstack_ix;
305	PL_retstack_max = c->retstack_max;
306	#endif
307	PL_curpm = c->curpm;
308	PL_curcop = c->curcop;
309		316
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	319	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		320	if (c->irssv)
		321	{
		322	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		323	SvREFCNT_dec (c->irssv);
		324	else
		325	{
		326	REPLACE_SV (PL_rs, c->irssv);
		327	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		328	sv_setsv (c->irssv_sv, PL_rs);
		329	}
		330	}
313		331
314	{	332	{
315	dSP;	333	dSP;
316	CV *cv;	334	CV *cv;
317		335
318	/* now do the ugly restore mess */	336	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	337	while ((cv = (CV *)POPs))
320	{	338	{
321	AV *padlist = (AV *)POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	339	put_padlist (cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	340	CvDEPTH (cv) = PTR2IV (POPs);
327	}	341	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	342	}
331		343
332	PUTBACK;	344	PUTBACK;
333	}	345	}
334	}	346	}
335		347
336	static void	348	static void
337	save_state(pTHX_ Coro__State c, int flags)	349	save_perl (Coro__State c)
338	{	350	{
339	{	351	{
340	dSP;	352	dSP;
341	I32 cxix = cxstack_ix;	353	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	354	PERL_CONTEXT *ccstk = cxstack;
…		…
345	/*	357	/*
346	* the worst thing you can imagine happens first - we have to save	358	* the worst thing you can imagine happens first - we have to save
347	* (and reinitialize) all cv's in the whole callchain :(	359	* (and reinitialize) all cv's in the whole callchain :(
348	*/	360	*/
349		361
		362	EXTEND (SP, 3 + 1);
350	PUSHs (Nullsv);	363	PUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	364	/* this loop was inspired by pp_caller */
352	for (;;)	365	for (;;)
353	{	366	{
354	while (cxix >= 0)	367	while (cxix >= 0)
355	{	368	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	369	PERL_CONTEXT *cx = &ccstk[cxix--];
357		370
358	if (CxTYPE(cx) == CXt_SUB)	371	if (CxTYPE (cx) == CXt_SUB)
359	{	372	{
360	CV *cv = cx->blk_sub.cv;	373	CV *cv = cx->blk_sub.cv;
		374
361	if (CvDEPTH(cv))	375	if (CvDEPTH (cv))
362	{	376	{
363	EXTEND (SP, CvDEPTH(cv)*2);	377	EXTEND (SP, 3);
364
365	while (--CvDEPTH(cv))
366	{
367	/* this tells the restore code to increment CvDEPTH */
368	PUSHs (Nullsv);
369	PUSHs ((SV *)cv);
370	}
371
372	PUSHs ((SV *)CvPADLIST(cv));	378	PUSHs ((SV *)CvPADLIST (cv));
		379	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	380	PUSHs ((SV *)cv);
374		381
		382	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	383	get_padlist (cv);
376	}	384	}
377	}	385	}
378	#ifdef CXt_FORMAT
379	else if (CxTYPE(cx) == CXt_FORMAT)
380	{
381	/* I never used formats, so how should I know how these are implemented? */
382	/* my bold guess is as a simple, plain sub... */
383	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384	}
385	#endif
386	}	386	}
387		387
388	if (top_si->si_type == PERLSI_MAIN)	388	if (top_si->si_type == PERLSI_MAIN)
389	break;	389	break;
390		390
…		…
394	}	394	}
395		395
396	PUTBACK;	396	PUTBACK;
397	}	397	}
398		398
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	399	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
400	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	400	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
401	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	401	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		402	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
402		403
403	c->dowarn = PL_dowarn;	404	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	405	# include "state.h"
405		406	#undef VAR
406	c->curstackinfo = PL_curstackinfo;
407	c->curstack = PL_curstack;
408	c->mainstack = PL_mainstack;
409	c->stack_sp = PL_stack_sp;
410	c->op = PL_op;
411	c->curpad = PL_curpad;
412	c->comppad = PL_comppad;
413	c->compcv = PL_compcv;
414	c->stack_base = PL_stack_base;
415	c->stack_max = PL_stack_max;
416	c->tmps_stack = PL_tmps_stack;
417	c->tmps_floor = PL_tmps_floor;
418	c->tmps_ix = PL_tmps_ix;
419	c->tmps_max = PL_tmps_max;
420	c->markstack = PL_markstack;
421	c->markstack_ptr = PL_markstack_ptr;
422	c->markstack_max = PL_markstack_max;
423	c->scopestack = PL_scopestack;
424	c->scopestack_ix = PL_scopestack_ix;
425	c->scopestack_max = PL_scopestack_max;
426	c->savestack = PL_savestack;
427	c->savestack_ix = PL_savestack_ix;
428	c->savestack_max = PL_savestack_max;
429	#if PERL_VERSION < 9
430	c->retstack = PL_retstack;
431	c->retstack_ix = PL_retstack_ix;
432	c->retstack_max = PL_retstack_max;
433	#endif
434	c->curpm = PL_curpm;
435	c->curcop = PL_curcop;
436	}	407	}
437		408
438	/*	409	/*
439	* allocate various perl stacks. This is an exact copy	410	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	411	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	412	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	413	* not usually need a lot of stackspace.
443	*/	414	*/
		415	#if PREFER_PERL_FUNCTIONS
		416	# define coro_init_stacks init_stacks
		417	#else
444	static void	418	static void
445	coro_init_stacks (pTHX)	419	coro_init_stacks ()
446	{	420	{
447	LOCK;
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	421	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
450	PL_curstackinfo->si_type = PERLSI_MAIN;	422	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	423	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	424	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		425
454	PL_stack_base = AvARRAY(PL_curstack);	426	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	427	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	428	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		429
458	New(50,PL_tmps_stack,96,SV*);	430	New(50,PL_tmps_stack,128,SV*);
459	PL_tmps_floor = -1;	431	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	432	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	433	PL_tmps_max = 128;
462		434
463	New(54,PL_markstack,16,I32);	435	New(54,PL_markstack,32,I32);
464	PL_markstack_ptr = PL_markstack;	436	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	437	PL_markstack_max = PL_markstack + 32;
466		438
467	#ifdef SET_MARK_OFFSET	439	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	440	SET_MARK_OFFSET;
469	#endif	441	#endif
470		442
471	New(54,PL_scopestack,16,I32);	443	New(54,PL_scopestack,32,I32);
472	PL_scopestack_ix = 0;	444	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	445	PL_scopestack_max = 32;
474		446
475	New(54,PL_savestack,96,ANY);	447	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	448	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	449	PL_savestack_max = 64;
478		450
479	#if PERL_VERSION < 9	451	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	452	New(54,PL_retstack,16,OP*);
481	PL_retstack_ix = 0;	453	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	454	PL_retstack_max = 16;
483	#endif	455	#endif
484
485	UNLOCK;
486	}	456	}
		457	#endif
487		458
488	/*	459	/*
489	* destroy the stacks, the callchain etc...	460	* destroy the stacks, the callchain etc...
490	*/	461	*/
491	static void	462	static void
492	destroy_stacks(pTHX)	463	coro_destroy_stacks ()
493	{	464	{
494	if (!IN_DESTRUCT)	465	if (!IN_DESTRUCT)
495	{	466	{
496	/* is this ugly, I ask? */	467	/* restore all saved variables and stuff */
497	LEAVE_SCOPE (0);	468	LEAVE_SCOPE (0);
		469	assert (PL_tmps_floor == -1);
498		470
499	/* sure it is, but more important: is it correct?? :/ */	471	/* free all temporaries */
500	FREETMPS;	472	FREETMPS;
		473	assert (PL_tmps_ix == -1);
501		474
502	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	475	POPSTACK_TO (PL_mainstack);
503	}	476	}
504		477
505	while (PL_curstackinfo->si_next)	478	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	479	PL_curstackinfo = PL_curstackinfo->si_next;
507		480
508	while (PL_curstackinfo)	481	while (PL_curstackinfo)
509	{	482	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	483	PERL_SI *p = PL_curstackinfo->si_prev;
511		484
512	{ /*D*//*remove*/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	485	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	486	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		487
524	Safefree (PL_curstackinfo->si_cxstack);	488	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	489	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	490	PL_curstackinfo = p;
527	}	491	}
528		492
529	Safefree (PL_tmps_stack);	493	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	494	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	495	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	496	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	497	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	498	Safefree (PL_retstack);
535	#endif	499	#endif
536	}	500	}
537		501
538	static void	502	static void
539	setup_coro (struct coro *coro)	503	setup_coro (struct coro *coro)
540	{	504	{
541	/*	505	/*
542	* emulate part of the perl startup here.	506	* emulate part of the perl startup here.
543	*/	507	*/
544	dTHX;	508
		509	coro_init_stacks ();
		510
		511	PL_curcop = &PL_compiling;
		512	PL_in_eval = EVAL_NULL;
		513	PL_curpm = 0;
		514	PL_localizing = 0;
		515	PL_dirty = 0;
		516	PL_restartop = 0;
		517
		518	{
		519	dSP;
		520	LOGOP myop;
		521
		522	SvREFCNT_dec (GvAV (PL_defgv));
		523	GvAV (PL_defgv) = coro->args; coro->args = 0;
		524
		525	Zero (&myop, 1, LOGOP);
		526	myop.op_next = Nullop;
		527	myop.op_flags = OPf_WANT_VOID;
		528
		529	PUSHMARK (SP);
		530	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		531	PUTBACK;
		532	PL_op = (OP *)&myop;
		533	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		534	SPAGAIN;
		535	}
		536
		537	ENTER; /* necessary e.g. for dounwind */
		538	}
		539
		540	static void
		541	free_coro_mortal ()
		542	{
		543	if (coro_mortal)
		544	{
		545	SvREFCNT_dec (coro_mortal);
		546	coro_mortal = 0;
		547	}
		548	}
		549
		550	/* inject a fake call to Coro::State::_cctx_init into the execution */
		551	static void NOINLINE
		552	prepare_cctx (coro_cctx *cctx)
		553	{
545	dSP;	554	dSP;
546	UNOP myop;	555	LOGOP myop;
547	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
548		556
549	coro_init_stacks (aTHX);
550	/*PL_curcop = 0;*/
551	/*PL_in_eval = PL_in_eval;*/ /* inherit */
552	SvREFCNT_dec (GvAV (PL_defgv));
553	GvAV (PL_defgv) = coro->args; coro->args = 0;
554
555	SPAGAIN;
556
557	Zero (&myop, 1, UNOP);	557	Zero (&myop, 1, LOGOP);
558	myop.op_next = Nullop;	558	myop.op_next = PL_op;
559	myop.op_flags = OPf_WANT_VOID;	559	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
560		560
		561	PUSHMARK (SP);
		562	EXTEND (SP, 2);
		563	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		564	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		565	PUTBACK;
561	PL_op = (OP *)&myop;	566	PL_op = (OP *)&myop;
562
563	PUSHMARK(SP);
564	XPUSHs (sub_init);
565	PUTBACK;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	568	SPAGAIN;
568
569	ENTER; /* necessary e.g. for dounwind */
570	}
571
572	static void
573	free_coro_mortal ()
574	{
575	if (coro_mortal)
576	{
577	SvREFCNT_dec (coro_mortal);
578	coro_mortal = 0;
579	}
580	}	569	}
581		570
582	static void	571	static void
583	coro_run (void *arg)	572	coro_run (void *arg)
584	{	573	{
		574	/* coro_run is the alternative tail of transfer(), so unlock here. */
		575	UNLOCK;
		576
585	/*	577	/*
586	* this is a _very_ stripped down perl interpreter ;)	578	* this is a _very_ stripped down perl interpreter ;)
587	*/	579	*/
588	dTHX;
589	PL_top_env = &PL_start_env;	580	PL_top_env = &PL_start_env;
590		581
591	UNLOCK;	582	/* inject call to cctx_init */
		583	prepare_cctx ((coro_cctx *)arg);
592		584
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restart_op */	585	/* somebody will hit me for both perl_run and PL_restartop */
598	perl_run (aTHX_ PERL_GET_CONTEXT);	586	PL_restartop = PL_op;
		587	perl_run (PL_curinterp);
599		588
		589	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
600	abort ();	590	abort ();
601	}	591	}
602		592
603	static coro_stack *	593	static coro_cctx *
604	stack_new ()	594	cctx_new ()
605	{	595	{
606	coro_stack *stack;	596	coro_cctx *cctx;
607		597
		598	++cctx_count;
		599
608	New (0, stack, 1, coro_stack);	600	Newz (0, cctx, 1, coro_cctx);
609		601
610	#if HAVE_MMAP	602	#if HAVE_MMAP
611		603
612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	604	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		605	/* mmap supposedly does allocate-on-write for us */
613	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	606	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
614		607
615	if (stack->sptr == (void *)-1)	608	if (cctx->sptr == (void *)-1)
616	{	609	{
617	perror ("FATAL: unable to mmap stack for coroutine");	610	perror ("FATAL: unable to mmap stack for coroutine");
618	_exit (EXIT_FAILURE);	611	_exit (EXIT_FAILURE);
619	}	612	}
620		613
		614	# if STACKGUARD
621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	615	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		616	# endif
622		617
623	#else	618	#else
624		619
625	stack->ssize = STACKSIZE * (long)sizeof (long);	620	cctx->ssize = STACKSIZE * (long)sizeof (long);
626	New (0, stack->sptr, STACKSIZE, long);	621	New (0, cctx->sptr, STACKSIZE, long);
627		622
628	if (!stack->sptr)	623	if (!cctx->sptr)
629	{	624	{
630	perror (stderr, "FATAL: unable to malloc stack for coroutine");	625	perror ("FATAL: unable to malloc stack for coroutine");
631	_exit (EXIT_FAILURE);	626	_exit (EXIT_FAILURE);
632	}	627	}
633		628
634	#endif	629	#endif
635		630
		631	#if USE_VALGRIND
		632	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		633	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		634	cctx->ssize + (char *)cctx->sptr
		635	);
		636	#endif
		637
636	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	638	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
637		639
638	return stack;	640	return cctx;
639	}	641	}
640		642
641	static void	643	static void
642	stack_free (coro_stack *stack)	644	cctx_destroy (coro_cctx *cctx)
643	{	645	{
644	if (!stack || stack == main_stack)	646	if (!cctx)
645	return;	647	return;
646		648
		649	--cctx_count;
		650
		651	#if USE_VALGRIND
		652	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		653	#endif
		654
647	#if HAVE_MMAP	655	#if HAVE_MMAP
648	munmap (stack->sptr, stack->ssize);	656	munmap (cctx->sptr, cctx->ssize);
649	#else	657	#else
650	Safefree (stack->sptr);	658	Safefree (cctx->sptr);
651	#endif	659	#endif
652		660
653	Safefree (stack);	661	Safefree (cctx);
654	}	662	}
655		663
656	static coro_stack *stack_first;
657
658	static coro_stack *	664	static coro_cctx *
659	stack_get ()	665	cctx_get ()
660	{	666	{
661	coro_stack *stack;	667	coro_cctx *cctx;
662		668
663	if (stack_first)	669	if (cctx_first)
664	{	670	{
665	stack = stack_first;	671	cctx = cctx_first;
666	stack_first = stack->next;	672	cctx_first = cctx->next;
		673	--cctx_idle;
667	}	674	}
668	else	675	else
669	{	676	{
670	stack = stack_new ();	677	cctx = cctx_new ();
671	PL_op = PL_op->op_next;	678	PL_op = PL_op->op_next;
672	}	679	}
673		680
674	return stack;	681	return cctx;
675	}	682	}
676		683
677	static void	684	static void
678	stack_put (coro_stack *stack)	685	cctx_put (coro_cctx *cctx)
679	{	686	{
680	stack->next = stack_first;	687	/* free another cctx if overlimit */
681	stack_first = stack;	688	if (cctx_idle >= MAX_IDLE_CCTX)
		689	{
		690	coro_cctx *first = cctx_first;
		691	cctx_first = first->next;
		692	--cctx_idle;
		693
		694	assert (!first->inuse);
		695	cctx_destroy (first);
		696	}
		697
		698	++cctx_idle;
		699	cctx->next = cctx_first;
		700	cctx_first = cctx;
682	}	701	}
683		702
684	/* never call directly, always through the coro_state_transfer global variable */	703	/* never call directly, always through the coro_state_transfer global variable */
685	static void	704	static void NOINLINE
686	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	705	transfer (struct coro *prev, struct coro *next)
687	{	706	{
688	dSTACKLEVEL;	707	dSTACKLEVEL;
689		708
690	/* sometimes transfer is only called to set idle_sp */	709	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	710	if (!next)
		711	{
692	((coro_stack *)prev)->idle_sp = STACKLEVEL;	712	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		713	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		714	}
693	else if (prev != next)	715	else if (prev != next)
694	{	716	{
695	coro_stack *prev__stack;	717	coro_cctx *prev__cctx;
		718
		719	if (prev->flags & CF_NEW)
		720	{
		721	/* create a new empty context */
		722	Newz (0, prev->cctx, 1, coro_cctx);
		723	prev->cctx->inuse = 1;
		724	prev->flags &= ~CF_NEW;
		725	prev->flags |= CF_RUNNING;
		726	}
		727
		728	/*TODO: must not croak here */
		729	if (!prev->flags & CF_RUNNING)
		730	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		731
		732	if (next->flags & CF_RUNNING)
		733	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		734
		735	prev->flags &= ~CF_RUNNING;
		736	next->flags |= CF_RUNNING;
696		737
697	LOCK;	738	LOCK;
698		739
699	if (next->mainstack)	740	if (next->flags & CF_NEW)
700	{	741	{
701	/* coroutine already started */	742	/* need to start coroutine */
702	SAVE (prev, flags);	743	next->flags &= ~CF_NEW;
703	LOAD (next);	744	/* first get rid of the old state */
		745	save_perl (prev);
		746	/* setup coroutine call */
		747	setup_coro (next);
		748	/* need a new stack */
		749	assert (!next->cctx);
704	}	750	}
705	else	751	else
706	{	752	{
707	/* need to start coroutine */	753	/* coroutine already started */
708	/* first get rid of the old state */	754	save_perl (prev);
709	SAVE (prev, -1);	755	load_perl (next);
710	/* setup coroutine call */
711	setup_coro (next);
712	/* need a stack */
713	next->stack = 0;
714	}	756	}
715		757
716	prev__stack = prev->stack;	758	prev__cctx = prev->cctx;
717		759
718	/* possibly "free" the stack */	760	/* possibly "free" the cctx */
719	if (prev__stack->idle_sp == STACKLEVEL)	761	if (prev__cctx->idle_sp == STACKLEVEL)
720	{	762	{
721	stack_put (prev__stack);	763	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		764	assert (PL_top_env == prev__cctx->top_env);
		765
722	prev->stack = 0;	766	prev->cctx = 0;
		767
		768	cctx_put (prev__cctx);
		769	prev__cctx->inuse = 0;
723	}	770	}
724		771
725	if (!next->stack)	772	if (!next->cctx)
726	next->stack = stack_get ();
727
728	if (prev__stack != next->stack)
729	{	773	{
730	prev__stack->top_env = PL_top_env;	774	next->cctx = cctx_get ();
731	PL_top_env = next->stack->top_env;	775	assert (!next->cctx->inuse);
732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	776	next->cctx->inuse = 1;
733	}	777	}
734		778
		779	if (prev__cctx != next->cctx)
		780	{
		781	prev__cctx->top_env = PL_top_env;
		782	PL_top_env = next->cctx->top_env;
		783	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		784	}
		785
735	free_coro_mortal ();	786	free_coro_mortal ();
736		787
737	UNLOCK;	788	UNLOCK;
738	}	789	}
739	}	790	}
740		791
741	/* use this function pointer to call the above function */
742	/* this is done to increase chances of the compiler not inlining the call */
743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
744	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
745
746	struct transfer_args	792	struct transfer_args
747	{	793	{
748	struct coro *prev, *next;	794	struct coro *prev, *next;
749	int flags;
750	};	795	};
751		796
752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	797	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
753		798
754	static void	799	static void
755	coro_state_destroy (struct coro *coro)	800	coro_state_destroy (struct coro *coro)
756	{	801	{
757	if (coro->refcnt--)	802	if (coro->refcnt--)
758	return;	803	return;
759		804
760	if (coro->mainstack && coro->mainstack != main_mainstack)	805	if (coro->mainstack && coro->mainstack != main_mainstack)
761	{	806	{
762	struct coro temp;	807	struct coro temp;
		808	Zero (&temp, 1, struct coro);
		809	temp.save = CORO_SAVE_ALL;
763		810
764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	811	if (coro->flags & CF_RUNNING)
765	LOAD (aTHX_ coro);	812	croak ("FATAL: tried to destroy currently running coroutine");
766		813
		814	save_perl (&temp);
		815	load_perl (coro);
		816
767	destroy_stacks (aTHX);	817	coro_destroy_stacks ();
768		818
769	LOAD ((&temp)); /* this will get rid of defsv etc.. */	819	load_perl (&temp); /* this will get rid of defsv etc.. */
770		820
771	coro->mainstack = 0;	821	coro->mainstack = 0;
772	}	822	}
773		823
774	stack_free (coro->stack);	824	cctx_destroy (coro->cctx);
775	SvREFCNT_dec (coro->args);	825	SvREFCNT_dec (coro->args);
776	Safefree (coro);	826	Safefree (coro);
777	}	827	}
778		828
779	static int	829	static int
780	coro_state_clear (SV *sv, MAGIC *mg)	830	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
781	{	831	{
782	struct coro *coro = (struct coro *)mg->mg_ptr;	832	struct coro *coro = (struct coro *)mg->mg_ptr;
783	mg->mg_ptr = 0;	833	mg->mg_ptr = 0;
784		834
785	coro_state_destroy (coro);	835	coro_state_destroy (coro);
786		836
787	return 0;	837	return 0;
788	}	838	}
789		839
790	static int	840	static int
791	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	841	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
792	{	842	{
793	struct coro *coro = (struct coro *)mg->mg_ptr;	843	struct coro *coro = (struct coro *)mg->mg_ptr;
794		844
795	++coro->refcnt;	845	++coro->refcnt;
796		846
797	return 0;	847	return 0;
798	}	848	}
799		849
800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	850	static MGVTBL coro_state_vtbl = {
		851	0, 0, 0, 0,
		852	coro_state_clear,
		853	0,
		854	#ifdef MGf_DUP
		855	coro_state_dup,
		856	#else
		857	# define MGf_DUP 0
		858	#endif
		859	};
801		860
802	static struct coro *	861	static struct coro *
803	SvSTATE (SV *coro)	862	SvSTATE (SV *coro)
804	{	863	{
805	HV *stash;	864	HV *stash;
…		…
820	assert (mg->mg_type == PERL_MAGIC_ext);	879	assert (mg->mg_type == PERL_MAGIC_ext);
821	return (struct coro *)mg->mg_ptr;	880	return (struct coro *)mg->mg_ptr;
822	}	881	}
823		882
824	static void	883	static void
825	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	884	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
826	{	885	{
827	ta->prev = SvSTATE (prev);	886	ta->prev = SvSTATE (prev_sv);
828	ta->next = SvSTATE (next);	887	ta->next = SvSTATE (next_sv);
829	ta->flags = flags;
830	}	888	}
831		889
832	static void	890	static void
833	api_transfer (SV *prev, SV *next, int flags)	891	api_transfer (SV *prev_sv, SV *next_sv)
834	{	892	{
835	dTHX;
836	struct transfer_args ta;	893	struct transfer_args ta;
837		894
838	prepare_transfer (aTHX_ &ta, prev, next, flags);	895	prepare_transfer (&ta, prev_sv, next_sv);
839	TRANSFER (ta);	896	TRANSFER (ta);
		897	}
		898
		899	static int
		900	api_save (SV *coro_sv, int new_save)
		901	{
		902	struct coro *coro = SvSTATE (coro_sv);
		903	int old_save = coro->save;
		904
		905	if (new_save >= 0)
		906	coro->save = new_save;
		907
		908	return old_save;
840	}	909	}
841		910
842	/** Coro ********************************************************************/	911	/** Coro ********************************************************************/
843		912
844	#define PRIO_MAX 3	913	#define PRIO_MAX 3
…		…
847	#define PRIO_LOW -1	916	#define PRIO_LOW -1
848	#define PRIO_IDLE -3	917	#define PRIO_IDLE -3
849	#define PRIO_MIN -4	918	#define PRIO_MIN -4
850		919
851	/* for Coro.pm */	920	/* for Coro.pm */
852	static GV *coro_current, *coro_idle;	921	static SV *coro_current;
853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	922	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
854	static int coro_nready;	923	static int coro_nready;
855		924
856	static void	925	static void
857	coro_enq (pTHX_ SV *sv)	926	coro_enq (SV *coro_sv)
858	{	927	{
859	int prio;
860
861	if (SvTYPE (sv) != SVt_PVHV)
862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
863
864	prio = SvSTATE (sv)->prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);	928	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;	929	coro_nready++;
868	}	930	}
869		931
870	static SV *	932	static SV *
871	coro_deq (pTHX_ int min_prio)	933	coro_deq (int min_prio)
872	{	934	{
873	int prio = PRIO_MAX - PRIO_MIN;	935	int prio = PRIO_MAX - PRIO_MIN;
874		936
875	min_prio -= PRIO_MIN;	937	min_prio -= PRIO_MIN;
876	if (min_prio < 0)	938	if (min_prio < 0)
…		…
884	}	946	}
885		947
886	return 0;	948	return 0;
887	}	949	}
888		950
889	static void	951	static int
890	api_ready (SV *coro)	952	api_ready (SV *coro_sv)
891	{	953	{
892	dTHX;	954	struct coro *coro;
893		955
894	if (SvROK (coro))	956	if (SvROK (coro_sv))
895	coro = SvRV (coro);	957	coro_sv = SvRV (coro_sv);
		958
		959	coro = SvSTATE (coro_sv);
		960
		961	if (coro->flags & CF_READY)
		962	return 0;
		963
		964	coro->flags |= CF_READY;
896		965
897	LOCK;	966	LOCK;
898	coro_enq (aTHX_ SvREFCNT_inc (coro));	967	coro_enq (SvREFCNT_inc (coro_sv));
899	UNLOCK;	968	UNLOCK;
900	}
901		969
		970	return 1;
		971	}
		972
902	static void	973	static int
		974	api_is_ready (SV *coro_sv)
		975	{
		976	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		977	}
		978
		979	static void
903	prepare_schedule (aTHX_ struct transfer_args *ta)	980	prepare_schedule (struct transfer_args *ta)
904	{	981	{
905	SV *current, *prev, *next;	982	SV *prev, *next;
906
907	LOCK;
908
909	current = GvSV (coro_current);
910		983
911	for (;;)	984	for (;;)
912	{	985	{
913	LOCK;	986	LOCK;
914
915	next = coro_deq (aTHX_ PRIO_MIN);	987	next = coro_deq (PRIO_MIN);
		988	UNLOCK;
916		989
917	if (next)	990	if (next)
918	break;	991	break;
919		992
920	UNLOCK;
921
922	{	993	{
923	dSP;	994	dSP;
924		995
925	ENTER;	996	ENTER;
926	SAVETMPS;	997	SAVETMPS;
927		998
928	PUSHMARK (SP);	999	PUSHMARK (SP);
929	PUTBACK;	1000	PUTBACK;
930	call_sv (GvSV (coro_idle), G_DISCARD);	1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
931		1002
932	FREETMPS;	1003	FREETMPS;
933	LEAVE;	1004	LEAVE;
934	}	1005	}
935	}	1006	}
936		1007
937	prev = SvRV (current);	1008	prev = SvRV (coro_current);
938	SvRV (current) = next;	1009	SvRV_set (coro_current, next);
939		1010
940	/* free this only after the transfer */	1011	/* free this only after the transfer */
		1012	LOCK;
941	free_coro_mortal ();	1013	free_coro_mortal ();
		1014	UNLOCK;
942	coro_mortal = prev;	1015	coro_mortal = prev;
943		1016
		1017	assert (!SvROK(prev));//D
		1018	assert (!SvROK(next));//D
		1019
944	ta->prev = SvSTATE (prev);	1020	ta->prev = SvSTATE (prev);
945	ta->next = SvSTATE (next);	1021	ta->next = SvSTATE (next);
946	ta->flags = TRANSFER_SAVE_ALL;
947		1022
948	UNLOCK;	1023	assert (ta->next->flags & CF_READY);
		1024	ta->next->flags &= ~CF_READY;
949	}	1025	}
950		1026
951	static void	1027	static void
952	prepare_cede (aTHX_ struct transfer_args *ta)	1028	prepare_cede (struct transfer_args *ta)
953	{	1029	{
954	LOCK;	1030	api_ready (coro_current);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957
958	prepare_schedule (ta);	1031	prepare_schedule (ta);
959	}	1032	}
960		1033
		1034	static int
		1035	prepare_cede_notself (struct transfer_args *ta)
		1036	{
		1037	if (coro_nready)
		1038	{
		1039	SV *prev = SvRV (coro_current);
		1040	prepare_schedule (ta);
		1041	api_ready (prev);
		1042	return 1;
		1043	}
		1044	else
		1045	return 0;
		1046	}
		1047
961	static void	1048	static void
962	api_schedule (void)	1049	api_schedule (void)
963	{	1050	{
964	dTHX;
965	struct transfer_args ta;	1051	struct transfer_args ta;
966		1052
967	prepare_schedule (&ta);	1053	prepare_schedule (&ta);
968	TRANSFER (ta);	1054	TRANSFER (ta);
969	}	1055	}
970		1056
971	static void	1057	static int
972	api_cede (void)	1058	api_cede (void)
973	{	1059	{
974	dTHX;
975	struct transfer_args ta;	1060	struct transfer_args ta;
976		1061
977	prepare_cede (&ta);	1062	prepare_cede (&ta);
		1063
		1064	if (ta.prev != ta.next)
		1065	{
978	TRANSFER (ta);	1066	TRANSFER (ta);
		1067	return 1;
		1068	}
		1069	else
		1070	return 0;
		1071	}
		1072
		1073	static int
		1074	api_cede_notself (void)
		1075	{
		1076	struct transfer_args ta;
		1077
		1078	if (prepare_cede_notself (&ta))
		1079	{
		1080	TRANSFER (ta);
		1081	return 1;
		1082	}
		1083	else
		1084	return 0;
979	}	1085	}
980		1086
981	MODULE = Coro::State PACKAGE = Coro::State	1087	MODULE = Coro::State PACKAGE = Coro::State
982		1088
983	PROTOTYPES: DISABLE	1089	PROTOTYPES: DISABLE
…		…
989	#endif	1095	#endif
990	BOOT_PAGESIZE;	1096	BOOT_PAGESIZE;
991		1097
992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1098	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993		1099
994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1100	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1101	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1102	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1103	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1104	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
997		1105
998	main_mainstack = PL_mainstack;	1106	main_mainstack = PL_mainstack;
999		1107
1000	coroapi.ver = CORO_API_VERSION;	1108	coroapi.ver = CORO_API_VERSION;
1001	coroapi.transfer = api_transfer;	1109	coroapi.transfer = api_transfer;
1002
1003	Newz (0, main_stack, 1, coro_stack);
1004	main_stack->idle_sp = (void *)-1;
1005		1110
1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1111	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1007	}	1112	}
1008		1113
1009	SV *	1114	SV *
…		…
1014	HV *hv;	1119	HV *hv;
1015	int i;	1120	int i;
1016		1121
1017	Newz (0, coro, 1, struct coro);	1122	Newz (0, coro, 1, struct coro);
1018	coro->args = newAV ();	1123	coro->args = newAV ();
		1124	coro->save = CORO_SAVE_ALL;
		1125	coro->flags = CF_NEW;
1019		1126
1020	hv = newHV ();	1127	hv = newHV ();
1021	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1128	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1129	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1023		1130
1024	for (i = 1; i < items; i++)	1131	for (i = 1; i < items; i++)
1025	av_push (coro->args, newSVsv (ST (i)));	1132	av_push (coro->args, newSVsv (ST (i)));
1026
1027	coro->stack = main_stack;
1028	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1029	/*coro->stack = 0;*/
1030	}	1133	}
1031	OUTPUT:	1134	OUTPUT:
1032	RETVAL	1135	RETVAL
1033		1136
		1137	int
		1138	save (SV *coro, int new_save = -1)
		1139	CODE:
		1140	RETVAL = api_save (coro, new_save);
		1141	OUTPUT:
		1142	RETVAL
		1143
1034	void	1144	void
1035	transfer (...)	1145	_set_stacklevel (...)
1036	ALIAS:	1146	ALIAS:
1037	Coro::schedule = 1	1147	Coro::State::transfer = 1
1038	Coro::cede = 2	1148	Coro::schedule = 2
1039	_set_stacklevel = 3	1149	Coro::cede = 3
		1150	Coro::cede_notself = 4
1040	CODE:	1151	CODE:
1041	{	1152	{
1042	struct transfer_args ta;	1153	struct transfer_args ta;
1043		1154
1044	switch (ix)	1155	switch (ix)
1045	{	1156	{
1046	case 0:	1157	case 0:
1047	if (items != 3)	1158	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1159	ta.next = 0;
1049
1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051	break;	1160	break;
1052		1161
1053	case 1:	1162	case 1:
		1163	if (items != 2)
		1164	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1165
		1166	prepare_transfer (&ta, ST (0), ST (1));
		1167	break;
		1168
		1169	case 2:
1054	prepare_schedule (&ta);	1170	prepare_schedule (&ta);
1055	break;	1171	break;
1056		1172
1057	case 2:	1173	case 3:
1058	prepare_cede (&ta);	1174	prepare_cede (&ta);
1059	break;	1175	break;
1060		1176
1061	case 3:	1177	case 4:
1062	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1178	if (!prepare_cede_notself (&ta))
1063	ta.next = 0;	1179	XSRETURN_EMPTY;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;	1180
1065	break;	1181	break;
1066	}	1182	}
1067		1183
		1184	BARRIER;
1068	TRANSFER (ta);	1185	TRANSFER (ta);
1069	}	1186	}
1070		1187
1071	void	1188	void
1072	_clone_state_from (SV *dst, SV *src)	1189	_clone_state_from (SV *dst, SV *src)
…		…
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);	1194	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078		1195
1079	++coro_src->refcnt;	1196	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;	1197	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1081	}	1198	}
1082
1083	void
1084	_nonlocal_goto (IV nextop)
1085	CODE:
1086	/* uuh, somebody will kill me again for this */
1087	PL_op->op_next = INT2PTR (OP *, nextop);
1088		1199
1089	void	1200	void
1090	_exit (code)	1201	_exit (code)
1091	int code	1202	int code
1092	PROTOTYPE: $	1203	PROTOTYPE: $
1093	CODE:	1204	CODE:
1094	_exit (code);	1205	_exit (code);
1095		1206
1096	MODULE = Coro::State PACKAGE = Coro::Cont	1207	int
		1208	cctx_count ()
		1209	CODE:
		1210	RETVAL = cctx_count;
		1211	OUTPUT:
		1212	RETVAL
1097		1213
1098	void	1214	int
1099	yield (...)	1215	cctx_idle ()
1100	PROTOTYPE: @	1216	CODE:
1101	CODE:	1217	RETVAL = cctx_idle;
1102	{	1218	OUTPUT:
1103	SV *yieldstack;	1219	RETVAL
1104	SV *sv;
1105	AV *defav = GvAV (PL_defgv);
1106	struct coro *prev, *next;
1107
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123	SvREFCNT_dec (sv);
1124
1125	coro_state_transfer (aTHX_ prev, next, 0);
1126	}
1127		1220
1128	MODULE = Coro::State PACKAGE = Coro	1221	MODULE = Coro::State PACKAGE = Coro
1129		1222
1130	BOOT:	1223	BOOT:
1131	{	1224	{
…		…
1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1231	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1232	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1233	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1234	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1142		1235
1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1236	coro_current = get_sv ("Coro::current", FALSE);
1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1237	SvREADONLY_on (coro_current);
1145		1238
1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1239	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147	coro_ready[i] = newAV ();	1240	coro_ready[i] = newAV ();
1148		1241
1149	{	1242	{
1150	SV *sv = perl_get_sv("Coro::API", 1);	1243	SV *sv = perl_get_sv("Coro::API", 1);
1151		1244
1152	coroapi.schedule = api_schedule;	1245	coroapi.schedule = api_schedule;
		1246	coroapi.save = api_save;
1153	coroapi.cede = api_cede;	1247	coroapi.cede = api_cede;
		1248	coroapi.cede_notself = api_cede_notself;
1154	coroapi.ready = api_ready;	1249	coroapi.ready = api_ready;
		1250	coroapi.is_ready = api_is_ready;
1155	coroapi.nready = &coro_nready;	1251	coroapi.nready = &coro_nready;
1156	coroapi.current = coro_current;	1252	coroapi.current = coro_current;
1157		1253
1158	GCoroAPI = &coroapi;	1254	GCoroAPI = &coroapi;
1159	sv_setiv (sv, (IV)&coroapi);	1255	sv_setiv (sv, (IV)&coroapi);
1160	SvREADONLY_on (sv);	1256	SvREADONLY_on (sv);
1161	}	1257	}
1162	}	1258	}
		1259
		1260	void
		1261	_set_current (SV *current)
		1262	PROTOTYPE: $
		1263	CODE:
		1264	SvREFCNT_dec (SvRV (coro_current));
		1265	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1163		1266
1164	int	1267	int
1165	prio (Coro::State coro, int newprio = 0)	1268	prio (Coro::State coro, int newprio = 0)
1166	ALIAS:	1269	ALIAS:
1167	nice = 1	1270	nice = 1
…		…
1170	RETVAL = coro->prio;	1273	RETVAL = coro->prio;
1171		1274
1172	if (items > 1)	1275	if (items > 1)
1173	{	1276	{
1174	if (ix)	1277	if (ix)
1175	newprio += coro->prio;	1278	newprio = coro->prio - newprio;
1176		1279
1177	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1280	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1178	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1281	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1179		1282
1180	coro->prio = newprio;	1283	coro->prio = newprio;
1181	}	1284	}
1182	}	1285	}
		1286	OUTPUT:
		1287	RETVAL
1183		1288
1184	void	1289	SV *
1185	ready (SV *self)	1290	ready (SV *self)
1186	PROTOTYPE: $	1291	PROTOTYPE: $
1187	CODE:	1292	CODE:
1188	api_ready (self);	1293	RETVAL = boolSV (api_ready (self));
		1294	OUTPUT:
		1295	RETVAL
		1296
		1297	SV *
		1298	is_ready (SV *self)
		1299	PROTOTYPE: $
		1300	CODE:
		1301	RETVAL = boolSV (api_is_ready (self));
		1302	OUTPUT:
		1303	RETVAL
1189		1304
1190	int	1305	int
1191	nready (...)	1306	nready (...)
1192	PROTOTYPE:	1307	PROTOTYPE:
1193	CODE:	1308	CODE:
…		…
1199		1314
1200	SV *	1315	SV *
1201	_get_state ()	1316	_get_state ()
1202	CODE:	1317	CODE:
1203	{	1318	{
1204	struct {	1319	struct io_state *data;
1205	int errorno;
1206	int laststype;
1207	int laststatval;
1208	Stat_t statcache;
1209	} data;
1210		1320
		1321	RETVAL = newSV (sizeof (struct io_state));
		1322	data = (struct io_state *)SvPVX (RETVAL);
		1323	SvCUR_set (RETVAL, sizeof (struct io_state));
		1324	SvPOK_only (RETVAL);
		1325
1211	data.errorno = errno;	1326	data->errorno = errno;
1212	data.laststype = PL_laststype;	1327	data->laststype = PL_laststype;
1213	data.laststatval = PL_laststatval;	1328	data->laststatval = PL_laststatval;
1214	data.statcache = PL_statcache;	1329	data->statcache = PL_statcache;
1215
1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
1217	}	1330	}
1218	OUTPUT:	1331	OUTPUT:
1219	RETVAL	1332	RETVAL
1220		1333
1221	void	1334	void
1222	_set_state (char *data_)	1335	_set_state (char *data_)
1223	PROTOTYPE: $	1336	PROTOTYPE: $
1224	CODE:	1337	CODE:
1225	{	1338	{
1226	struct {	1339	struct io_state *data = (void *)data_;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} *data = (void *)data_;
1232		1340
1233	errno = data->errorno;	1341	errno = data->errorno;
1234	PL_laststype = data->laststype;	1342	PL_laststype = data->laststype;
1235	PL_laststatval = data->laststatval;	1343	PL_laststatval = data->laststatval;
1236	PL_statcache = data->statcache;	1344	PL_statcache = data->statcache;
1237	}	1345	}
		1346

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