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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.134 by root, Thu Jan 4 23:49:27 2007 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	/* the stack */	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 */
100	void *idle_sp; /* original stacklevel when coroutine was created */	142	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		143	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
101	JMPENV *top_env;	144	JMPENV *top_env;
102	coro_context cctx;	145	coro_context cctx;
103	} coro_stack;
104		146
105	/* the (fake) coro_stack representing the main program */	147	int inuse;
106	static coro_stack *main_stack;	148
		149	#if USE_VALGRIND
		150	int valgrind_id;
		151	#endif
		152	} coro_cctx;
		153
		154	enum {
		155	CF_RUNNING = 0x0001, /* coroutine is running */
		156	CF_READY = 0x0002, /* coroutine is ready */
		157	CF_NEW = 0x0004, /* has never been switched to */
		158	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		159	};
107		160
108	/* this is a structure representing a perl-level coroutine */	161	/* this is a structure representing a perl-level coroutine */
109	struct coro {	162	struct coro {
110	/* the c coroutine allocated to this perl coroutine, if any */	163	/* the c coroutine allocated to this perl coroutine, if any */
111	coro_stack *stack;	164	coro_cctx *cctx;
112		165
113	/* data associated with this coroutine (initial args) */	166	/* data associated with this coroutine (initial args) */
114	AV *args;	167	AV *args;
115	int refcnt;	168	int refcnt;
		169	int save; /* CORO_SAVE flags */
		170	int flags; /* CF_ flags */
116		171
117	/* optionally saved, might be zero */	172	/* optionally saved, might be zero */
118	AV *defav;	173	AV *defav; /* @_ */
119	SV *defsv;	174	SV *defsv; /* $_ */
120	SV *errsv;	175	SV *errsv; /* $@ */
		176	SV *irssv; /* $/ */
		177	SV *irssv_sv; /* real $/ cache */
121		178
122	/* saved global state not related to stacks */	179	#define VAR(name,type) type name;
123	U8 dowarn;	180	# include "state.h"
124	I32 in_eval;	181	#undef VAR
125
126	/* the stacks and related info (callchain etc..) */
127	PERL_SI *curstackinfo;
128	AV *curstack;
129	AV *mainstack;
130	SV **stack_sp;
131	OP *op;
132	SV **curpad;
133	AV *comppad;
134	CV *compcv;
135	SV **stack_base;
136	SV **stack_max;
137	SV **tmps_stack;
138	I32 tmps_floor;
139	I32 tmps_ix;
140	I32 tmps_max;
141	I32 *markstack;
142	I32 *markstack_ptr;
143	I32 *markstack_max;
144	I32 *scopestack;
145	I32 scopestack_ix;
146	I32 scopestack_max;
147	ANY *savestack;
148	I32 savestack_ix;
149	I32 savestack_max;
150	OP **retstack;
151	I32 retstack_ix;
152	I32 retstack_max;
153	PMOP *curpm;
154	COP *curcop;
155		182
156	/* coro process data */	183	/* coro process data */
157	int prio;	184	int prio;
158	};	185	};
159		186
160	typedef struct coro *Coro__State;	187	typedef struct coro *Coro__State;
161	typedef struct coro *Coro__State_or_hashref;	188	typedef struct coro *Coro__State_or_hashref;
162		189
163	static AV *	190	static AV *
164	coro_clone_padlist (pTHX_ CV *cv)	191	coro_clone_padlist (CV *cv)
165	{	192	{
166	AV *padlist = CvPADLIST (cv);	193	AV *padlist = CvPADLIST (cv);
167	AV *newpadlist, *newpad;	194	AV *newpadlist, *newpad;
168		195
169	newpadlist = newAV ();	196	newpadlist = newAV ();
170	AvREAL_off (newpadlist);	197	AvREAL_off (newpadlist);
171	#if PERL_VERSION < 9	198	#if PERL_VERSION_ATLEAST (5,9,0)
		199	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		200	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	201	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173	#else
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#endif	202	#endif
176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	203	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177	--AvFILLp (padlist);	204	--AvFILLp (padlist);
178		205
179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	206	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
181		208
182	return newpadlist;	209	return newpadlist;
183	}	210	}
184		211
185	static void	212	static void
186	free_padlist (pTHX_ AV *padlist)	213	free_padlist (AV *padlist)
187	{	214	{
188	/* may be during global destruction */	215	/* may be during global destruction */
189	if (SvREFCNT (padlist))	216	if (SvREFCNT (padlist))
190	{	217	{
191	I32 i = AvFILLp (padlist);	218	I32 i = AvFILLp (padlist);
…		…
212	AV *padlist;	239	AV *padlist;
213	AV *av = (AV *)mg->mg_obj;	240	AV *av = (AV *)mg->mg_obj;
214		241
215	/* casting is fun. */	242	/* casting is fun. */
216	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	243	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
217	free_padlist (aTHX_ padlist);	244	free_padlist (padlist);
218		245
219	SvREFCNT_dec (av);	246	SvREFCNT_dec (av);
220		247
221	return 0;	248	return 0;
222	}	249	}
223		250
224	#define PERL_MAGIC_coro PERL_MAGIC_ext	251	#define PERL_MAGIC_coro PERL_MAGIC_ext
225		252
226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	253	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
227		254
		255	#define CORO_MAGIC(cv) \
		256	SvMAGIC (cv) \
		257	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		258	? SvMAGIC (cv) \
		259	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		260	: 0
		261
228	/* the next two functions merely cache the padlists */	262	/* the next two functions merely cache the padlists */
229	static void	263	static void
230	get_padlist (pTHX_ CV *cv)	264	get_padlist (CV *cv)
231	{	265	{
232	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	MAGIC *mg = CORO_MAGIC (cv);
		267	AV *av;
233		268
234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
235	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236	else	271	else
237	{	272	{
238	#if 0	273	#if PREFER_PERL_FUNCTIONS
239	/* this should work - but it doesn't :( */	274	/* this is probably cleaner, but also slower? */
240	CV *cp = Perl_cv_clone (aTHX_ cv);	275	CV *cp = Perl_cv_clone (cv);
241	CvPADLIST (cv) = CvPADLIST (cp);	276	CvPADLIST (cv) = CvPADLIST (cp);
242	CvPADLIST (cp) = 0;	277	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (cp);	278	SvREFCNT_dec (cp);
244	#else	279	#else
245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	280	CvPADLIST (cv) = coro_clone_padlist (cv);
246	#endif	281	#endif
247	}	282	}
248	}	283	}
249		284
250	static void	285	static void
251	put_padlist (pTHX_ CV *cv)	286	put_padlist (CV *cv)
252	{	287	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
254		290
255	if (!mg)	291	if (!mg)
256	{	292	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	295	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	296	mg->mg_obj = (SV *)newAV ();
261	}	297	}
262		298
263	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	299	av = (AV *)mg->mg_obj;
		300
		301	if (AvFILLp (av) >= AvMAX (av))
		302	av_extend (av, AvMAX (av) + 1);
		303
		304	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264	}	305	}
265		306
266	#define SB do {	307	#define SB do {
267	#define SE } while (0)	308	#define SE } while (0)
268		309
269	#define LOAD(state) load_state(aTHX_ (state));
270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
271
272	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
273		311
274	static void	312	static void
275	load_state(pTHX_ Coro__State c)	313	load_perl (Coro__State c)
276	{	314	{
277	PL_dowarn = c->dowarn;	315	#define VAR(name,type) PL_ ## name = c->name;
278	PL_in_eval = c->in_eval;	316	# include "state.h"
279		317	#undef VAR
280	PL_curstackinfo = c->curstackinfo;
281	PL_curstack = c->curstack;
282	PL_mainstack = c->mainstack;
283	PL_stack_sp = c->stack_sp;
284	PL_op = c->op;
285	PL_curpad = c->curpad;
286	PL_comppad = c->comppad;
287	PL_compcv = c->compcv;
288	PL_stack_base = c->stack_base;
289	PL_stack_max = c->stack_max;
290	PL_tmps_stack = c->tmps_stack;
291	PL_tmps_floor = c->tmps_floor;
292	PL_tmps_ix = c->tmps_ix;
293	PL_tmps_max = c->tmps_max;
294	PL_markstack = c->markstack;
295	PL_markstack_ptr = c->markstack_ptr;
296	PL_markstack_max = c->markstack_max;
297	PL_scopestack = c->scopestack;
298	PL_scopestack_ix = c->scopestack_ix;
299	PL_scopestack_max = c->scopestack_max;
300	PL_savestack = c->savestack;
301	PL_savestack_ix = c->savestack_ix;
302	PL_savestack_max = c->savestack_max;
303	#if PERL_VERSION < 9
304	PL_retstack = c->retstack;
305	PL_retstack_ix = c->retstack_ix;
306	PL_retstack_max = c->retstack_max;
307	#endif
308	PL_curpm = c->curpm;
309	PL_curcop = c->curcop;
310		318
311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	319	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	320	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
313	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	321	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		322	if (c->irssv)
		323	{
		324	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		325	SvREFCNT_dec (c->irssv);
		326	else
		327	{
		328	REPLACE_SV (PL_rs, c->irssv);
		329	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		330	sv_setsv (c->irssv_sv, PL_rs);
		331	}
		332	}
314		333
315	{	334	{
316	dSP;	335	dSP;
317	CV *cv;	336	CV *cv;
318		337
319	/* now do the ugly restore mess */	338	/* now do the ugly restore mess */
320	while ((cv = (CV *)POPs))	339	while ((cv = (CV *)POPs))
321	{	340	{
322	AV *padlist = (AV *)POPs;
323
324	if (padlist)
325	{
326	put_padlist (aTHX_ cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
327	CvPADLIST(cv) = padlist;	342	CvDEPTH (cv) = PTR2IV (POPs);
328	}	343	CvPADLIST (cv) = (AV *)POPs;
329
330	++CvDEPTH(cv);
331	}	344	}
332		345
333	PUTBACK;	346	PUTBACK;
334	}	347	}
335	}	348	}
336		349
337	static void	350	static void
338	save_state(pTHX_ Coro__State c, int flags)	351	save_perl (Coro__State c)
339	{	352	{
340	{	353	{
341	dSP;	354	dSP;
342	I32 cxix = cxstack_ix;	355	I32 cxix = cxstack_ix;
343	PERL_CONTEXT *ccstk = cxstack;	356	PERL_CONTEXT *ccstk = cxstack;
…		…
346	/*	359	/*
347	* the worst thing you can imagine happens first - we have to save	360	* the worst thing you can imagine happens first - we have to save
348	* (and reinitialize) all cv's in the whole callchain :(	361	* (and reinitialize) all cv's in the whole callchain :(
349	*/	362	*/
350		363
		364	EXTEND (SP, 3 + 1);
351	PUSHs (Nullsv);	365	PUSHs (Nullsv);
352	/* this loop was inspired by pp_caller */	366	/* this loop was inspired by pp_caller */
353	for (;;)	367	for (;;)
354	{	368	{
355	while (cxix >= 0)	369	while (cxix >= 0)
356	{	370	{
357	PERL_CONTEXT *cx = &ccstk[cxix--];	371	PERL_CONTEXT *cx = &ccstk[cxix--];
358		372
359	if (CxTYPE(cx) == CXt_SUB)	373	if (CxTYPE (cx) == CXt_SUB)
360	{	374	{
361	CV *cv = cx->blk_sub.cv;	375	CV *cv = cx->blk_sub.cv;
		376
362	if (CvDEPTH(cv))	377	if (CvDEPTH (cv))
363	{	378	{
364	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, 3);
365
366	while (--CvDEPTH(cv))
367	{
368	/* this tells the restore code to increment CvDEPTH */
369	PUSHs (Nullsv);
370	PUSHs ((SV *)cv);
371	}
372
373	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST (cv));
		381	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
374	PUSHs ((SV *)cv);	382	PUSHs ((SV *)cv);
375		383
		384	CvDEPTH (cv) = 0;
376	get_padlist (aTHX_ cv);	385	get_padlist (cv);
377	}	386	}
378	}	387	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE(cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	388	}
388		389
389	if (top_si->si_type == PERLSI_MAIN)	390	if (top_si->si_type == PERLSI_MAIN)
390	break;	391	break;
391		392
…		…
395	}	396	}
396		397
397	PUTBACK;	398	PUTBACK;
398	}	399	}
399		400
400	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	401	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	402	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
402	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	403	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		404	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
403		405
404	c->dowarn = PL_dowarn;	406	#define VAR(name,type)c->name = PL_ ## name;
405	c->in_eval = PL_in_eval;	407	# include "state.h"
406		408	#undef VAR
407	c->curstackinfo = PL_curstackinfo;
408	c->curstack = PL_curstack;
409	c->mainstack = PL_mainstack;
410	c->stack_sp = PL_stack_sp;
411	c->op = PL_op;
412	c->curpad = PL_curpad;
413	c->comppad = PL_comppad;
414	c->compcv = PL_compcv;
415	c->stack_base = PL_stack_base;
416	c->stack_max = PL_stack_max;
417	c->tmps_stack = PL_tmps_stack;
418	c->tmps_floor = PL_tmps_floor;
419	c->tmps_ix = PL_tmps_ix;
420	c->tmps_max = PL_tmps_max;
421	c->markstack = PL_markstack;
422	c->markstack_ptr = PL_markstack_ptr;
423	c->markstack_max = PL_markstack_max;
424	c->scopestack = PL_scopestack;
425	c->scopestack_ix = PL_scopestack_ix;
426	c->scopestack_max = PL_scopestack_max;
427	c->savestack = PL_savestack;
428	c->savestack_ix = PL_savestack_ix;
429	c->savestack_max = PL_savestack_max;
430	#if PERL_VERSION < 9
431	c->retstack = PL_retstack;
432	c->retstack_ix = PL_retstack_ix;
433	c->retstack_max = PL_retstack_max;
434	#endif
435	c->curpm = PL_curpm;
436	c->curcop = PL_curcop;
437	}	409	}
438		410
439	/*	411	/*
440	* allocate various perl stacks. This is an exact copy	412	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	413	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	414	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	415	* not usually need a lot of stackspace.
444	*/	416	*/
		417	#if PREFER_PERL_FUNCTIONS
		418	# define coro_init_stacks init_stacks
		419	#else
445	static void	420	static void
446	coro_init_stacks (pTHX)	421	coro_init_stacks ()
447	{	422	{
448	LOCK;
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
451	PL_curstackinfo->si_type = PERLSI_MAIN;	424	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	425	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		427
455	PL_stack_base = AvARRAY(PL_curstack);	428	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	429	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		431
459	New(50,PL_tmps_stack,96,SV*);	432	New(50,PL_tmps_stack,128,SV*);
460	PL_tmps_floor = -1;	433	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	434	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	435	PL_tmps_max = 128;
463		436
464	New(54,PL_markstack,16,I32);	437	New(54,PL_markstack,32,I32);
465	PL_markstack_ptr = PL_markstack;	438	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	439	PL_markstack_max = PL_markstack + 32;
467		440
468	#ifdef SET_MARK_OFFSET	441	#ifdef SET_MARK_OFFSET
469	SET_MARK_OFFSET;	442	SET_MARK_OFFSET;
470	#endif	443	#endif
471		444
472	New(54,PL_scopestack,16,I32);	445	New(54,PL_scopestack,32,I32);
473	PL_scopestack_ix = 0;	446	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	447	PL_scopestack_max = 32;
475		448
476	New(54,PL_savestack,96,ANY);	449	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	450	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	451	PL_savestack_max = 64;
479		452
480	#if PERL_VERSION < 9	453	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	454	New(54,PL_retstack,16,OP*);
482	PL_retstack_ix = 0;	455	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	456	PL_retstack_max = 16;
484	#endif	457	#endif
485
486	UNLOCK;
487	}	458	}
		459	#endif
488		460
489	/*	461	/*
490	* destroy the stacks, the callchain etc...	462	* destroy the stacks, the callchain etc...
491	*/	463	*/
492	static void	464	static void
493	destroy_stacks(pTHX)	465	coro_destroy_stacks ()
494	{	466	{
495	if (!IN_DESTRUCT)	467	if (!IN_DESTRUCT)
496	{	468	{
497	/* is this ugly, I ask? */	469	/* restore all saved variables and stuff */
498	LEAVE_SCOPE (0);	470	LEAVE_SCOPE (0);
		471	assert (PL_tmps_floor == -1);
499		472
500	/* sure it is, but more important: is it correct?? :/ */	473	/* free all temporaries */
501	FREETMPS;	474	FREETMPS;
		475	assert (PL_tmps_ix == -1);
502		476
		477	/* unwind all extra stacks */
503	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	478	POPSTACK_TO (PL_mainstack);
		479
		480	/* unwind main stack */
		481	dounwind (-1);
504	}	482	}
505		483
506	while (PL_curstackinfo->si_next)	484	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	485	PL_curstackinfo = PL_curstackinfo->si_next;
508		486
509	while (PL_curstackinfo)	487	while (PL_curstackinfo)
510	{	488	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	489	PERL_SI *p = PL_curstackinfo->si_prev;
512		490
513	{ /*D*//*remove*/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	492	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		493
525	Safefree (PL_curstackinfo->si_cxstack);	494	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	495	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	496	PL_curstackinfo = p;
528	}	497	}
529		498
530	Safefree (PL_tmps_stack);	499	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	500	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	501	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	502	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	503	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	504	Safefree (PL_retstack);
536	#endif	505	#endif
537	}	506	}
538		507
539	static void	508	static void
540	setup_coro (struct coro *coro)	509	setup_coro (struct coro *coro)
541	{	510	{
542	/*	511	/*
543	* emulate part of the perl startup here.	512	* emulate part of the perl startup here.
544	*/	513	*/
545	dTHX;	514
		515	coro_init_stacks ();
		516
		517	PL_curcop = &PL_compiling;
		518	PL_in_eval = EVAL_NULL;
		519	PL_curpm = 0;
		520	PL_localizing = 0;
		521	PL_dirty = 0;
		522	PL_restartop = 0;
		523
		524	{
		525	dSP;
		526	LOGOP myop;
		527
		528	SvREFCNT_dec (GvAV (PL_defgv));
		529	GvAV (PL_defgv) = coro->args; coro->args = 0;
		530
		531	Zero (&myop, 1, LOGOP);
		532	myop.op_next = Nullop;
		533	myop.op_flags = OPf_WANT_VOID;
		534
		535	PUSHMARK (SP);
		536	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		537	PUTBACK;
		538	PL_op = (OP *)&myop;
		539	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		540	SPAGAIN;
		541	}
		542
		543	ENTER; /* necessary e.g. for dounwind */
		544	}
		545
		546	static void
		547	free_coro_mortal ()
		548	{
		549	if (coro_mortal)
		550	{
		551	SvREFCNT_dec (coro_mortal);
		552	coro_mortal = 0;
		553	}
		554	}
		555
		556	/* inject a fake call to Coro::State::_cctx_init into the execution */
		557	static void NOINLINE
		558	prepare_cctx (coro_cctx *cctx)
		559	{
546	dSP;	560	dSP;
547	UNOP myop;	561	LOGOP myop;
548	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
549		562
550	coro_init_stacks (aTHX);
551	/*PL_curcop = 0;*/
552	/*PL_in_eval = PL_in_eval;*/ /* inherit */
553	SvREFCNT_dec (GvAV (PL_defgv));
554	GvAV (PL_defgv) = coro->args; coro->args = 0;
555
556	SPAGAIN;
557
558	Zero (&myop, 1, UNOP);	563	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	564	myop.op_next = PL_op;
560	myop.op_flags = OPf_WANT_VOID;	565	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561		566
		567	PUSHMARK (SP);
		568	EXTEND (SP, 2);
		569	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		570	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		571	PUTBACK;
562	PL_op = (OP *)&myop;	572	PL_op = (OP *)&myop;
563
564	PUSHMARK(SP);
565	XPUSHs (sub_init);
566	PUTBACK;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	573	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	574	SPAGAIN;
569
570	ENTER; /* necessary e.g. for dounwind */
571	}
572
573	static void
574	free_coro_mortal ()
575	{
576	if (coro_mortal)
577	{
578	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;
580	}
581	}	575	}
582		576
583	static void	577	static void
584	coro_run (void *arg)	578	coro_run (void *arg)
585	{	579	{
		580	/* coro_run is the alternative tail of transfer(), so unlock here. */
		581	UNLOCK;
		582
586	/*	583	/*
587	* this is a _very_ stripped down perl interpreter ;)	584	* this is a _very_ stripped down perl interpreter ;)
588	*/	585	*/
589	dTHX;
590
591	UNLOCK;
592
593	PL_top_env = &PL_start_env;	586	PL_top_env = &PL_start_env;
594		587
595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	588	/* inject call to cctx_init */
596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	589	prepare_cctx ((coro_cctx *)arg);
597		590
598	/* continue at cctx_init, without entersub */
599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601	/* somebody will hit me for both perl_run and PL_restart_op */	591	/* somebody will hit me for both perl_run and PL_restartop */
602	perl_run (aTHX_ PERL_GET_CONTEXT);	592	PL_restartop = PL_op;
		593	perl_run (PL_curinterp);
603		594
		595	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
604	abort ();	596	abort ();
605	}	597	}
606		598
607	static coro_stack *	599	static coro_cctx *
608	stack_new ()	600	cctx_new ()
609	{	601	{
610	coro_stack *stack;	602	coro_cctx *cctx;
611		603
		604	++cctx_count;
		605
612	New (0, stack, 1, coro_stack);	606	Newz (0, cctx, 1, coro_cctx);
613		607
614	#if HAVE_MMAP	608	#if HAVE_MMAP
615		609
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	610	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		611	/* mmap supposedly does allocate-on-write for us */
617	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	612	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
618		613
619	if (stack->sptr == (void *)-1)	614	if (cctx->sptr == (void *)-1)
620	{	615	{
621	perror ("FATAL: unable to mmap stack for coroutine");	616	perror ("FATAL: unable to mmap stack for coroutine");
622	_exit (EXIT_FAILURE);	617	_exit (EXIT_FAILURE);
623	}	618	}
624		619
		620	# if STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	621	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		622	# endif
626		623
627	#else	624	#else
628		625
629	stack->ssize = STACKSIZE * (long)sizeof (long);	626	cctx->ssize = STACKSIZE * (long)sizeof (long);
630	New (0, stack->sptr, STACKSIZE, long);	627	New (0, cctx->sptr, STACKSIZE, long);
631		628
632	if (!stack->sptr)	629	if (!cctx->sptr)
633	{	630	{
634	perror (stderr, "FATAL: unable to malloc stack for coroutine");	631	perror ("FATAL: unable to malloc stack for coroutine");
635	_exit (EXIT_FAILURE);	632	_exit (EXIT_FAILURE);
636	}	633	}
637		634
638	#endif	635	#endif
639		636
		637	#if USE_VALGRIND
		638	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		639	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		640	cctx->ssize + (char *)cctx->sptr
		641	);
		642	#endif
		643
640	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	644	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
641		645
642	return stack;	646	return cctx;
643	}	647	}
644		648
645	static void	649	static void
646	stack_free (coro_stack *stack)	650	cctx_destroy (coro_cctx *cctx)
647	{	651	{
648	if (!stack || stack == main_stack)	652	if (!cctx)
649	return;	653	return;
650		654
		655	--cctx_count;
		656
		657	#if USE_VALGRIND
		658	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		659	#endif
		660
651	#if HAVE_MMAP	661	#if HAVE_MMAP
652	munmap (stack->sptr, stack->ssize);	662	munmap (cctx->sptr, cctx->ssize);
653	#else	663	#else
654	Safefree (stack->sptr);	664	Safefree (cctx->sptr);
655	#endif	665	#endif
656		666
657	Safefree (stack);	667	Safefree (cctx);
658	}	668	}
659		669
660	static coro_stack *stack_first;
661
662	static coro_stack *	670	static coro_cctx *
663	stack_get ()	671	cctx_get ()
664	{	672	{
665	coro_stack *stack;	673	coro_cctx *cctx;
666		674
667	if (stack_first)	675	if (cctx_first)
668	{	676	{
669	stack = stack_first;	677	cctx = cctx_first;
670	stack_first = stack->next;	678	cctx_first = cctx->next;
		679	--cctx_idle;
671	}	680	}
672	else	681	else
673	{	682	{
674	stack = stack_new ();	683	cctx = cctx_new ();
675	PL_op = PL_op->op_next;	684	PL_op = PL_op->op_next;
676	}	685	}
677		686
678	return stack;	687	return cctx;
679	}	688	}
680		689
681	static void	690	static void
682	stack_put (coro_stack *stack)	691	cctx_put (coro_cctx *cctx)
683	{	692	{
684	stack->next = stack_first;	693	/* free another cctx if overlimit */
685	stack_first = stack;	694	if (cctx_idle >= MAX_IDLE_CCTX)
		695	{
		696	coro_cctx *first = cctx_first;
		697	cctx_first = first->next;
		698	--cctx_idle;
		699
		700	assert (!first->inuse);
		701	cctx_destroy (first);
		702	}
		703
		704	++cctx_idle;
		705	cctx->next = cctx_first;
		706	cctx_first = cctx;
686	}	707	}
687		708
688	/* never call directly, always through the coro_state_transfer global variable */	709	/* never call directly, always through the coro_state_transfer global variable */
689	static void	710	static void NOINLINE
690	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	711	transfer (struct coro *prev, struct coro *next)
691	{	712	{
692	dSTACKLEVEL;	713	dSTACKLEVEL;
693		714
694	/* sometimes transfer is only called to set idle_sp */	715	/* sometimes transfer is only called to set idle_sp */
695	if (flags == TRANSFER_SET_STACKLEVEL)	716	if (!next)
		717	{
696	((coro_stack *)prev)->idle_sp = STACKLEVEL;	718	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		719	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		720	}
697	else if (prev != next)	721	else if (prev != next)
698	{	722	{
699	coro_stack *prev__stack;	723	coro_cctx *prev__cctx;
		724
		725	if (prev->flags & CF_NEW)
		726	{
		727	/* create a new empty context */
		728	Newz (0, prev->cctx, 1, coro_cctx);
		729	prev->cctx->inuse = 1;
		730	prev->flags &= ~CF_NEW;
		731	prev->flags |= CF_RUNNING;
		732	}
		733
		734	/*TODO: must not croak here */
		735	if (!prev->flags & CF_RUNNING)
		736	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		737
		738	if (next->flags & CF_RUNNING)
		739	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		740
		741	if (next->flags & CF_DESTROYED)
		742	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		743
		744	prev->flags &= ~CF_RUNNING;
		745	next->flags |= CF_RUNNING;
700		746
701	LOCK;	747	LOCK;
702		748
703	if (next->mainstack)	749	if (next->flags & CF_NEW)
704	{	750	{
705	/* coroutine already started */	751	/* need to start coroutine */
706	SAVE (prev, flags);	752	next->flags &= ~CF_NEW;
707	LOAD (next);	753	/* first get rid of the old state */
		754	save_perl (prev);
		755	/* setup coroutine call */
		756	setup_coro (next);
		757	/* need a new stack */
		758	assert (!next->cctx);
708	}	759	}
709	else	760	else
710	{	761	{
711	/* need to start coroutine */	762	/* coroutine already started */
712	/* first get rid of the old state */	763	save_perl (prev);
713	SAVE (prev, -1);	764	load_perl (next);
714	/* setup coroutine call */
715	setup_coro (next);
716	/* need a stack */
717	next->stack = 0;
718	}	765	}
719		766
720	prev__stack = prev->stack;	767	prev__cctx = prev->cctx;
721		768
722	/* possibly "free" the stack */	769	/* possibly "free" the cctx */
723	if (prev__stack->idle_sp == STACKLEVEL)	770	if (prev__cctx->idle_sp == STACKLEVEL)
724	{	771	{
725	stack_put (prev__stack);	772	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		773	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		774
726	prev->stack = 0;	775	prev->cctx = 0;
		776
		777	cctx_put (prev__cctx);
		778	prev__cctx->inuse = 0;
727	}	779	}
728		780
729	if (!next->stack)	781	if (!next->cctx)
730	next->stack = stack_get ();
731
732	if (prev__stack != next->stack)
733	{	782	{
734	prev__stack->top_env = PL_top_env;	783	next->cctx = cctx_get ();
735	PL_top_env = next->stack->top_env;	784	assert (!next->cctx->inuse);
736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	785	next->cctx->inuse = 1;
737	}	786	}
738		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
739	free_coro_mortal ();	795	free_coro_mortal ();
740
741	UNLOCK;	796	UNLOCK;
742	}	797	}
743	}	798	}
744		799
745	/* use this function pointer to call the above function */
746	/* this is done to increase chances of the compiler not inlining the call */
747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
749
750	struct transfer_args	800	struct transfer_args
751	{	801	{
752	struct coro *prev, *next;	802	struct coro *prev, *next;
753	int flags;
754	};	803	};
755		804
756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	805	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
757		806
758	static void	807	static int
759	coro_state_destroy (struct coro *coro)	808	coro_state_destroy (struct coro *coro)
760	{	809	{
761	if (coro->refcnt--)	810	if (coro->flags & CF_DESTROYED)
762	return;	811	return 0;
		812
		813	coro->flags |= CF_DESTROYED;
763		814
764	if (coro->mainstack && coro->mainstack != main_mainstack)	815	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	816	{
		817	assert (!(coro->flags & CF_RUNNING));
		818
766	struct coro temp;	819	struct coro temp;
		820	Zero (&temp, 1, struct coro);
		821	temp.save = CORO_SAVE_ALL;
767		822
768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	823	if (coro->flags & CF_RUNNING)
769	LOAD (aTHX_ coro);	824	croak ("FATAL: tried to destroy currently running coroutine");
770		825
		826	save_perl (&temp);
		827	load_perl (coro);
		828
771	destroy_stacks (aTHX);	829	coro_destroy_stacks ();
772		830
773	LOAD ((&temp)); /* this will get rid of defsv etc.. */	831	load_perl (&temp); /* this will get rid of defsv etc.. */
774		832
775	coro->mainstack = 0;	833	coro->mainstack = 0;
776	}	834	}
777		835
778	stack_free (coro->stack);	836	cctx_destroy (coro->cctx);
779	SvREFCNT_dec (coro->args);	837	SvREFCNT_dec (coro->args);
780	Safefree (coro);	838
		839	return 1;
781	}	840	}
782		841
783	static int	842	static int
784	coro_state_clear (SV *sv, MAGIC *mg)	843	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
785	{	844	{
786	struct coro *coro = (struct coro *)mg->mg_ptr;	845	struct coro *coro = (struct coro *)mg->mg_ptr;
787	mg->mg_ptr = 0;	846	mg->mg_ptr = 0;
788		847
		848	if (--coro->refcnt < 0)
		849	{
789	coro_state_destroy (coro);	850	coro_state_destroy (coro);
		851	Safefree (coro);
		852	}
790		853
791	return 0;	854	return 0;
792	}	855	}
793		856
794	static int	857	static int
795	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	858	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
796	{	859	{
797	struct coro *coro = (struct coro *)mg->mg_ptr;	860	struct coro *coro = (struct coro *)mg->mg_ptr;
798		861
799	++coro->refcnt;	862	++coro->refcnt;
800		863
801	return 0;	864	return 0;
802	}	865	}
803		866
804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	867	static MGVTBL coro_state_vtbl = {
		868	0, 0, 0, 0,
		869	coro_state_free,
		870	0,
		871	#ifdef MGf_DUP
		872	coro_state_dup,
		873	#else
		874	# define MGf_DUP 0
		875	#endif
		876	};
805		877
806	static struct coro *	878	static struct coro *
807	SvSTATE (SV *coro)	879	SvSTATE (SV *coro)
808	{	880	{
809	HV *stash;	881	HV *stash;
…		…
824	assert (mg->mg_type == PERL_MAGIC_ext);	896	assert (mg->mg_type == PERL_MAGIC_ext);
825	return (struct coro *)mg->mg_ptr;	897	return (struct coro *)mg->mg_ptr;
826	}	898	}
827		899
828	static void	900	static void
829	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	901	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
830	{	902	{
831	ta->prev = SvSTATE (prev);	903	ta->prev = SvSTATE (prev_sv);
832	ta->next = SvSTATE (next);	904	ta->next = SvSTATE (next_sv);
833	ta->flags = flags;
834	}	905	}
835		906
836	static void	907	static void
837	api_transfer (SV *prev, SV *next, int flags)	908	api_transfer (SV *prev_sv, SV *next_sv)
838	{	909	{
839	dTHX;
840	struct transfer_args ta;	910	struct transfer_args ta;
841		911
842	prepare_transfer (aTHX_ &ta, prev, next, flags);	912	prepare_transfer (&ta, prev_sv, next_sv);
843	TRANSFER (ta);	913	TRANSFER (ta);
		914	}
		915
		916	static int
		917	api_save (SV *coro_sv, int new_save)
		918	{
		919	struct coro *coro = SvSTATE (coro_sv);
		920	int old_save = coro->save;
		921
		922	if (new_save >= 0)
		923	coro->save = new_save;
		924
		925	return old_save;
844	}	926	}
845		927
846	/** Coro ********************************************************************/	928	/** Coro ********************************************************************/
847		929
848	#define PRIO_MAX 3	930	#define PRIO_MAX 3
…		…
851	#define PRIO_LOW -1	933	#define PRIO_LOW -1
852	#define PRIO_IDLE -3	934	#define PRIO_IDLE -3
853	#define PRIO_MIN -4	935	#define PRIO_MIN -4
854		936
855	/* for Coro.pm */	937	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;	938	static SV *coro_current;
857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	939	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;	940	static int coro_nready;
859		941
860	static void	942	static void
861	coro_enq (pTHX_ SV *sv)	943	coro_enq (SV *coro_sv)
862	{	944	{
863	int prio;
864
865	if (SvTYPE (sv) != SVt_PVHV)
866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868	prio = SvSTATE (sv)->prio;
869
870	av_push (coro_ready [prio - PRIO_MIN], sv);	945	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
871	coro_nready++;	946	coro_nready++;
872	}	947	}
873		948
874	static SV *	949	static SV *
875	coro_deq (pTHX_ int min_prio)	950	coro_deq (int min_prio)
876	{	951	{
877	int prio = PRIO_MAX - PRIO_MIN;	952	int prio = PRIO_MAX - PRIO_MIN;
878		953
879	min_prio -= PRIO_MIN;	954	min_prio -= PRIO_MIN;
880	if (min_prio < 0)	955	if (min_prio < 0)
…		…
888	}	963	}
889		964
890	return 0;	965	return 0;
891	}	966	}
892		967
893	static void	968	static int
894	api_ready (SV *coro)	969	api_ready (SV *coro_sv)
895	{	970	{
896	dTHX;	971	struct coro *coro;
897		972
898	if (SvROK (coro))	973	if (SvROK (coro_sv))
899	coro = SvRV (coro);	974	coro_sv = SvRV (coro_sv);
		975
		976	coro = SvSTATE (coro_sv);
		977
		978	if (coro->flags & CF_READY)
		979	return 0;
		980
		981	coro->flags |= CF_READY;
900		982
901	LOCK;	983	LOCK;
902	coro_enq (aTHX_ SvREFCNT_inc (coro));	984	coro_enq (SvREFCNT_inc (coro_sv));
903	UNLOCK;	985	UNLOCK;
904	}
905		986
		987	return 1;
		988	}
		989
906	static void	990	static int
		991	api_is_ready (SV *coro_sv)
		992	{
		993	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		994	}
		995
		996	static void
907	prepare_schedule (aTHX_ struct transfer_args *ta)	997	prepare_schedule (struct transfer_args *ta)
908	{	998	{
909	SV *current, *prev, *next;	999	SV *prev_sv, *next_sv;
		1000
		1001	for (;;)
		1002	{
		1003	LOCK;
		1004	next_sv = coro_deq (PRIO_MIN);
		1005	UNLOCK;
		1006
		1007	/* nothing to schedule: call the idle handler */
		1008	if (!next_sv)
		1009	{
		1010	dSP;
		1011
		1012	ENTER;
		1013	SAVETMPS;
		1014
		1015	PUSHMARK (SP);
		1016	PUTBACK;
		1017	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1018
		1019	FREETMPS;
		1020	LEAVE;
		1021	continue;
		1022	}
		1023
		1024	ta->next = SvSTATE (next_sv);
		1025
		1026	/* cannot transfer to destroyed coros, skip and look for next */
		1027	if (ta->next->flags & CF_DESTROYED)
		1028	{
		1029	SvREFCNT_dec (next_sv);
		1030	continue;
		1031	}
		1032
		1033	break;
		1034	}
		1035
		1036	/* free this only after the transfer */
		1037	prev_sv = SvRV (coro_current);
		1038	SvRV_set (coro_current, next_sv);
		1039	ta->prev = SvSTATE (prev_sv);
		1040
		1041	assert (ta->next->flags & CF_READY);
		1042	ta->next->flags &= ~CF_READY;
910		1043
911	LOCK;	1044	LOCK;
912
913	current = GvSV (coro_current);
914
915	for (;;)
916	{
917	LOCK;
918
919	next = coro_deq (aTHX_ PRIO_MIN);
920
921	if (next)
922	break;
923
924	UNLOCK;
925
926	{
927	dSP;
928
929	ENTER;
930	SAVETMPS;
931
932	PUSHMARK (SP);
933	PUTBACK;
934	call_sv (GvSV (coro_idle), G_DISCARD);
935
936	FREETMPS;
937	LEAVE;
938	}
939	}
940
941	prev = SvRV (current);
942	SvRV (current) = next;
943
944	/* free this only after the transfer */
945	free_coro_mortal ();	1045	free_coro_mortal ();
946	coro_mortal = prev;	1046	coro_mortal = prev_sv;
947
948	ta->prev = SvSTATE (prev);
949	ta->next = SvSTATE (next);
950	ta->flags = TRANSFER_SAVE_ALL;
951
952	UNLOCK;	1047	UNLOCK;
953	}	1048	}
954		1049
955	static void	1050	static void
956	prepare_cede (aTHX_ struct transfer_args *ta)	1051	prepare_cede (struct transfer_args *ta)
957	{	1052	{
958	LOCK;	1053	api_ready (coro_current);
959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960	UNLOCK;
961
962	prepare_schedule (ta);	1054	prepare_schedule (ta);
963	}	1055	}
964		1056
		1057	static int
		1058	prepare_cede_notself (struct transfer_args *ta)
		1059	{
		1060	if (coro_nready)
		1061	{
		1062	SV *prev = SvRV (coro_current);
		1063	prepare_schedule (ta);
		1064	api_ready (prev);
		1065	return 1;
		1066	}
		1067	else
		1068	return 0;
		1069	}
		1070
965	static void	1071	static void
966	api_schedule (void)	1072	api_schedule (void)
967	{	1073	{
968	dTHX;
969	struct transfer_args ta;	1074	struct transfer_args ta;
970		1075
971	prepare_schedule (&ta);	1076	prepare_schedule (&ta);
972	TRANSFER (ta);	1077	TRANSFER (ta);
973	}	1078	}
974		1079
975	static void	1080	static int
976	api_cede (void)	1081	api_cede (void)
977	{	1082	{
978	dTHX;
979	struct transfer_args ta;	1083	struct transfer_args ta;
980		1084
981	prepare_cede (&ta);	1085	prepare_cede (&ta);
		1086
		1087	if (ta.prev != ta.next)
		1088	{
982	TRANSFER (ta);	1089	TRANSFER (ta);
		1090	return 1;
		1091	}
		1092	else
		1093	return 0;
		1094	}
		1095
		1096	static int
		1097	api_cede_notself (void)
		1098	{
		1099	struct transfer_args ta;
		1100
		1101	if (prepare_cede_notself (&ta))
		1102	{
		1103	TRANSFER (ta);
		1104	return 1;
		1105	}
		1106	else
		1107	return 0;
983	}	1108	}
984		1109
985	MODULE = Coro::State PACKAGE = Coro::State	1110	MODULE = Coro::State PACKAGE = Coro::State
986		1111
987	PROTOTYPES: DISABLE	1112	PROTOTYPES: DISABLE
…		…
993	#endif	1118	#endif
994	BOOT_PAGESIZE;	1119	BOOT_PAGESIZE;
995		1120
996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1121	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997		1122
998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1123	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1000	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1125	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1126	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1127	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1001		1128
1002	main_mainstack = PL_mainstack;	1129	main_mainstack = PL_mainstack;
1003		1130
1004	coroapi.ver = CORO_API_VERSION;	1131	coroapi.ver = CORO_API_VERSION;
1005	coroapi.transfer = api_transfer;	1132	coroapi.transfer = api_transfer;
1006
1007	Newz (0, main_stack, 1, coro_stack);
1008	main_stack->idle_sp = (void *)-1;
1009		1133
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1134	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011	}	1135	}
1012		1136
1013	SV *	1137	SV *
…		…
1018	HV *hv;	1142	HV *hv;
1019	int i;	1143	int i;
1020		1144
1021	Newz (0, coro, 1, struct coro);	1145	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1146	coro->args = newAV ();
		1147	coro->save = CORO_SAVE_ALL;
		1148	coro->flags = CF_NEW;
1023		1149
1024	hv = newHV ();	1150	hv = newHV ();
1025	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1151	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1152	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1153
1028	for (i = 1; i < items; i++)	1154	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1155	av_push (coro->args, newSVsv (ST (i)));
1030
1031	coro->stack = main_stack;
1032	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1033	/*coro->stack = 0;*/
1034	}	1156	}
1035	OUTPUT:	1157	OUTPUT:
1036	RETVAL	1158	RETVAL
1037		1159
		1160	int
		1161	save (SV *coro, int new_save = -1)
		1162	CODE:
		1163	RETVAL = api_save (coro, new_save);
		1164	OUTPUT:
		1165	RETVAL
		1166
1038	void	1167	void
1039	transfer (...)	1168	_set_stacklevel (...)
1040	ALIAS:	1169	ALIAS:
1041	Coro::schedule = 1	1170	Coro::State::transfer = 1
1042	Coro::cede = 2	1171	Coro::schedule = 2
1043	_set_stacklevel = 3	1172	Coro::cede = 3
		1173	Coro::cede_notself = 4
1044	CODE:	1174	CODE:
1045	{	1175	{
1046	struct transfer_args ta;	1176	struct transfer_args ta;
1047		1177
1048	switch (ix)	1178	switch (ix)
1049	{	1179	{
1050	case 0:	1180	case 0:
1051	if (items != 3)	1181	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1182	ta.next = 0;
1053
1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055	break;	1183	break;
1056		1184
1057	case 1:	1185	case 1:
		1186	if (items != 2)
		1187	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1188
		1189	prepare_transfer (&ta, ST (0), ST (1));
		1190	break;
		1191
		1192	case 2:
1058	prepare_schedule (&ta);	1193	prepare_schedule (&ta);
1059	break;	1194	break;
1060		1195
1061	case 2:	1196	case 3:
1062	prepare_cede (&ta);	1197	prepare_cede (&ta);
1063	break;	1198	break;
1064		1199
1065	case 3:	1200	case 4:
1066	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1201	if (!prepare_cede_notself (&ta))
1067	ta.next = 0;	1202	XSRETURN_EMPTY;
1068	ta.flags = TRANSFER_SET_STACKLEVEL;	1203
1069	break;	1204	break;
1070	}	1205	}
1071		1206
		1207	BARRIER;
1072	TRANSFER (ta);	1208	TRANSFER (ta);
1073	}	1209	}
1074		1210
1075	void	1211	bool
1076	_clone_state_from (SV *dst, SV *src)	1212	_destroy (SV *coro_sv)
1077	CODE:	1213	CODE:
1078	{	1214	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1079	struct coro *coro_src = SvSTATE (src);	1215	OUTPUT:
1080		1216	RETVAL
1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082
1083	++coro_src->refcnt;
1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1085	}
1086
1087	void
1088	_nonlocal_goto (IV nextop)
1089	CODE:
1090	/* uuh, somebody will kill me again for this */
1091	PL_op->op_next = INT2PTR (OP *, nextop);
1092		1217
1093	void	1218	void
1094	_exit (code)	1219	_exit (code)
1095	int code	1220	int code
1096	PROTOTYPE: $	1221	PROTOTYPE: $
1097	CODE:	1222	CODE:
1098	_exit (code);	1223	_exit (code);
1099		1224
1100	MODULE = Coro::State PACKAGE = Coro::Cont	1225	int
		1226	cctx_count ()
		1227	CODE:
		1228	RETVAL = cctx_count;
		1229	OUTPUT:
		1230	RETVAL
1101		1231
1102	void	1232	int
1103	yield (...)	1233	cctx_idle ()
1104	PROTOTYPE: @	1234	CODE:
1105	CODE:	1235	RETVAL = cctx_idle;
1106	{	1236	OUTPUT:
1107	SV *yieldstack;	1237	RETVAL
1108	SV *sv;
1109	AV *defav = GvAV (PL_defgv);
1110	struct coro *prev, *next;
1111
1112	yieldstack = *hv_fetch (
1113	(HV *)SvRV (GvSV (coro_current)),
1114	"yieldstack", sizeof ("yieldstack") - 1,
1115	0
1116	);
1117
1118	/* set up @_ -- ugly */
1119	av_clear (defav);
1120	av_fill (defav, items - 1);
1121	while (items--)
1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124	sv = av_pop ((AV *)SvRV (yieldstack));
1125	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1126	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1127	SvREFCNT_dec (sv);
1128
1129	coro_state_transfer (aTHX_ prev, next, 0);
1130	}
1131		1238
1132	MODULE = Coro::State PACKAGE = Coro	1239	MODULE = Coro::State PACKAGE = Coro
1133		1240
1134	BOOT:	1241	BOOT:
1135	{	1242	{
…		…
1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1249	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1250	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1251	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1252	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146		1253
1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1254	coro_current = get_sv ("Coro::current", FALSE);
1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1255	SvREADONLY_on (coro_current);
1149		1256
1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1257	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151	coro_ready[i] = newAV ();	1258	coro_ready[i] = newAV ();
1152		1259
1153	{	1260	{
1154	SV *sv = perl_get_sv("Coro::API", 1);	1261	SV *sv = perl_get_sv("Coro::API", 1);
1155		1262
1156	coroapi.schedule = api_schedule;	1263	coroapi.schedule = api_schedule;
		1264	coroapi.save = api_save;
1157	coroapi.cede = api_cede;	1265	coroapi.cede = api_cede;
		1266	coroapi.cede_notself = api_cede_notself;
1158	coroapi.ready = api_ready;	1267	coroapi.ready = api_ready;
		1268	coroapi.is_ready = api_is_ready;
1159	coroapi.nready = &coro_nready;	1269	coroapi.nready = &coro_nready;
1160	coroapi.current = coro_current;	1270	coroapi.current = coro_current;
1161		1271
1162	GCoroAPI = &coroapi;	1272	GCoroAPI = &coroapi;
1163	sv_setiv (sv, (IV)&coroapi);	1273	sv_setiv (sv, (IV)&coroapi);
1164	SvREADONLY_on (sv);	1274	SvREADONLY_on (sv);
1165	}	1275	}
1166	}	1276	}
		1277
		1278	void
		1279	_set_current (SV *current)
		1280	PROTOTYPE: $
		1281	CODE:
		1282	SvREFCNT_dec (SvRV (coro_current));
		1283	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1167		1284
1168	int	1285	int
1169	prio (Coro::State coro, int newprio = 0)	1286	prio (Coro::State coro, int newprio = 0)
1170	ALIAS:	1287	ALIAS:
1171	nice = 1	1288	nice = 1
…		…
1174	RETVAL = coro->prio;	1291	RETVAL = coro->prio;
1175		1292
1176	if (items > 1)	1293	if (items > 1)
1177	{	1294	{
1178	if (ix)	1295	if (ix)
1179	newprio += coro->prio;	1296	newprio = coro->prio - newprio;
1180		1297
1181	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1298	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1182	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1299	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1183		1300
1184	coro->prio = newprio;	1301	coro->prio = newprio;
1185	}	1302	}
1186	}	1303	}
		1304	OUTPUT:
		1305	RETVAL
1187		1306
1188	void	1307	SV *
1189	ready (SV *self)	1308	ready (SV *self)
1190	PROTOTYPE: $	1309	PROTOTYPE: $
1191	CODE:	1310	CODE:
1192	api_ready (self);	1311	RETVAL = boolSV (api_ready (self));
		1312	OUTPUT:
		1313	RETVAL
		1314
		1315	SV *
		1316	is_ready (SV *self)
		1317	PROTOTYPE: $
		1318	CODE:
		1319	RETVAL = boolSV (api_is_ready (self));
		1320	OUTPUT:
		1321	RETVAL
1193		1322
1194	int	1323	int
1195	nready (...)	1324	nready (...)
1196	PROTOTYPE:	1325	PROTOTYPE:
1197	CODE:	1326	CODE:
…		…
1203		1332
1204	SV *	1333	SV *
1205	_get_state ()	1334	_get_state ()
1206	CODE:	1335	CODE:
1207	{	1336	{
1208	struct {	1337	struct io_state *data;
1209	int errorno;
1210	int laststype;
1211	int laststatval;
1212	Stat_t statcache;
1213	} data;
1214		1338
		1339	RETVAL = newSV (sizeof (struct io_state));
		1340	data = (struct io_state *)SvPVX (RETVAL);
		1341	SvCUR_set (RETVAL, sizeof (struct io_state));
		1342	SvPOK_only (RETVAL);
		1343
1215	data.errorno = errno;	1344	data->errorno = errno;
1216	data.laststype = PL_laststype;	1345	data->laststype = PL_laststype;
1217	data.laststatval = PL_laststatval;	1346	data->laststatval = PL_laststatval;
1218	data.statcache = PL_statcache;	1347	data->statcache = PL_statcache;
1219
1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
1221	}	1348	}
1222	OUTPUT:	1349	OUTPUT:
1223	RETVAL	1350	RETVAL
1224		1351
1225	void	1352	void
1226	_set_state (char *data_)	1353	_set_state (char *data_)
1227	PROTOTYPE: $	1354	PROTOTYPE: $
1228	CODE:	1355	CODE:
1229	{	1356	{
1230	struct {	1357	struct io_state *data = (void *)data_;
1231	int errorno;
1232	int laststype;
1233	int laststatval;
1234	Stat_t statcache;
1235	} *data = (void *)data_;
1236		1358
1237	errno = data->errorno;	1359	errno = data->errorno;
1238	PL_laststype = data->laststype;	1360	PL_laststype = data->laststype;
1239	PL_laststatval = data->laststatval;	1361	PL_laststatval = data->laststatval;
1240	PL_statcache = data->statcache;	1362	PL_statcache = data->statcache;
1241	}	1363	}
		1364

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