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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.113 by root, Thu Nov 30 20:54:24 2006 UTC vs.
Revision 1.150 by root, Wed Jun 13 21:04:48 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
74	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
75	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	95	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
79		98
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		100
82	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	104	#else
85	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
86	#endif	107	#endif
87		108
88	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
89		110
90	#include "CoroAPI.h"	111	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		112
94	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	117	#else
99	# define LOCK (void)0	118	# define LOCK (void)0
100	# define UNLOCK (void)0	119	# define UNLOCK (void)0
101	#endif	120	#endif
102		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
107		137
108	static struct coro_cctx *cctx_first;	138	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	139	static int cctx_count, cctx_idle;
…		…
112	typedef struct coro_cctx {	142	typedef struct coro_cctx {
113	struct coro_cctx *next;	143	struct coro_cctx *next;
114		144
115	/* the stack */	145	/* the stack */
116	void *sptr;	146	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
118		148
119	/* cpu state */	149	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	152	JMPENV *top_env;
122	coro_context cctx;	153	coro_context cctx;
123		154
124	int inuse;
125
126	#if USE_VALGRIND	155	#if CORO_USE_VALGRIND
127	int valgrind_id;	156	int valgrind_id;
128	#endif	157	#endif
		158	char inuse, mapped;
129	} coro_cctx;	159	} coro_cctx;
130		160
131	enum {	161	enum {
132	CF_RUNNING, /* coroutine is running */	162	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	166	};
135		167
136	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
137	struct coro {	169	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	171	coro_cctx *cctx;
140		172
141	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
142	AV *args;	174	AV *args;
143	int refcnt;	175	int refcnt;
144	int flags;	176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
145		178
146	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
147	AV *defav;	180	AV *defav; /* @_ */
148	SV *defsv;	181	SV *defsv; /* $_ */
149	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
150		186
151	#define VAR(name,type) type name;	187	#define VAR(name,type) type name;
152	# include "state.h"	188	# include "state.h"
153	#undef VAR	189	#undef VAR
154		190
…		…
157	};	193	};
158		194
159	typedef struct coro *Coro__State;	195	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	196	typedef struct coro *Coro__State_or_hashref;
161		197
		198	/** Coro ********************************************************************/
		199
		200	#define PRIO_MAX 3
		201	#define PRIO_HIGH 1
		202	#define PRIO_NORMAL 0
		203	#define PRIO_LOW -1
		204	#define PRIO_IDLE -3
		205	#define PRIO_MIN -4
		206
		207	/* for Coro.pm */
		208	static SV *coro_current;
		209	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		210	static int coro_nready;
		211
		212	/** lowlevel stuff **********************************************************/
		213
162	static AV *	214	static AV *
163	coro_clone_padlist (CV *cv)	215	coro_clone_padlist (pTHX_ CV *cv)
164	{	216	{
165	AV *padlist = CvPADLIST (cv);	217	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	218	AV *newpadlist, *newpad;
167		219
168	newpadlist = newAV ();	220	newpadlist = newAV ();
…		…
180		232
181	return newpadlist;	233	return newpadlist;
182	}	234	}
183		235
184	static void	236	static void
185	free_padlist (AV *padlist)	237	free_padlist (pTHX_ AV *padlist)
186	{	238	{
187	/* may be during global destruction */	239	/* may be during global destruction */
188	if (SvREFCNT (padlist))	240	if (SvREFCNT (padlist))
189	{	241	{
190	I32 i = AvFILLp (padlist);	242	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	263	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	264	AV *av = (AV *)mg->mg_obj;
213		265
214	/* casting is fun. */	266	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (padlist);	268	free_padlist (aTHX_ padlist);
217		269
218	SvREFCNT_dec (av);	270	SvREFCNT_dec (av);
219		271
220	return 0;	272	return 0;
221	}	273	}
…		…
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	283	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	284	: 0
233		285
234	/* the next two functions merely cache the padlists */	286	/* the next two functions merely cache the padlists */
235	static void	287	static void
236	get_padlist (CV *cv)	288	get_padlist (pTHX_ CV *cv)
237	{	289	{
238	MAGIC *mg = CORO_MAGIC (cv);	290	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	291	AV *av;
240		292
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	293	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	294	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	295	else
244	{	296	{
245	#if 0	297	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	298	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	299	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	300	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	301	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	302	SvREFCNT_dec (cp);
251	#else	303	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	304	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	305	#endif
254	}	306	}
255	}	307	}
256		308
257	static void	309	static void
258	put_padlist (CV *cv)	310	put_padlist (pTHX_ CV *cv)
259	{	311	{
260	MAGIC *mg = CORO_MAGIC (cv);	312	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	313	AV *av;
262		314
263	if (!mg)	315	if (!mg)
…		…
274	av_extend (av, AvMAX (av) + 1);	326	av_extend (av, AvMAX (av) + 1);
275		327
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	328	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	329	}
278		330
		331	/** load & save, init *******************************************************/
		332
279	#define SB do {	333	#define SB do {
280	#define SE } while (0)	334	#define SE } while (0)
281		335
282	#define LOAD(state) load_state((state));
283	#define SAVE(state,flags) save_state((state),(flags));
284
285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	336	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
286		337
287	static void	338	static void
288	load_state(Coro__State c)	339	load_perl (pTHX_ Coro__State c)
289	{	340	{
290	#define VAR(name,type) PL_ ## name = c->name;	341	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	342	# include "state.h"
292	#undef VAR	343	#undef VAR
293		344
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	345	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	346	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	347	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		348	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		349
		350	if (c->irssv)
		351	{
		352	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		353	{
		354	SvREFCNT_dec (c->irssv);
		355	c->irssv = 0;
		356	}
		357	else
		358	{
		359	REPLACE_SV (PL_rs, c->irssv);
		360	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		361	sv_setsv (c->irssv_sv, PL_rs);
		362	}
		363	}
297		364
298	{	365	{
299	dSP;	366	dSP;
300	CV *cv;	367	CV *cv;
301		368
302	/* now do the ugly restore mess */	369	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	370	while ((cv = (CV *)POPs))
304	{	371	{
305	put_padlist (cv); /* mark this padlist as available */	372	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	373	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	374	CvPADLIST (cv) = (AV *)POPs;
308	}	375	}
309		376
310	PUTBACK;	377	PUTBACK;
311	}	378	}
		379	assert (!PL_comppad || AvARRAY (PL_comppad));//D
312	}	380	}
313		381
314	static void	382	static void
315	save_state(Coro__State c, int flags)	383	save_perl (pTHX_ Coro__State c)
316	{	384	{
		385	assert (!PL_comppad || AvARRAY (PL_comppad));//D
317	{	386	{
318	dSP;	387	dSP;
319	I32 cxix = cxstack_ix;	388	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	389	PERL_CONTEXT *ccstk = cxstack;
321	PERL_SI *top_si = PL_curstackinfo;	390	PERL_SI *top_si = PL_curstackinfo;
…		…
323	/*	392	/*
324	* the worst thing you can imagine happens first - we have to save	393	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	394	* (and reinitialize) all cv's in the whole callchain :(
326	*/	395	*/
327		396
		397	EXTEND (SP, 3 + 1);
328	PUSHs (Nullsv);	398	PUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	399	/* this loop was inspired by pp_caller */
330	for (;;)	400	for (;;)
331	{	401	{
332	while (cxix >= 0)	402	while (cxix >= 0)
333	{	403	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	404	PERL_CONTEXT *cx = &ccstk[cxix--];
335		405
336	if (CxTYPE(cx) == CXt_SUB)	406	if (CxTYPE (cx) == CXt_SUB)
337	{	407	{
338	CV *cv = cx->blk_sub.cv;	408	CV *cv = cx->blk_sub.cv;
339		409
340	if (CvDEPTH (cv))	410	if (CvDEPTH (cv))
341	{	411	{
342	EXTEND (SP, 3);	412	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	413	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	414	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
347		416
348	CvDEPTH (cv) = 0;	417	CvDEPTH (cv) = 0;
349	get_padlist (cv);	418	get_padlist (aTHX_ cv);
350	}	419	}
351	}	420	}
352	#ifdef CXt_FORMAT
353	else if (CxTYPE(cx) == CXt_FORMAT)
354	{
355	/* I never used formats, so how should I know how these are implemented? */
356	/* my bold guess is as a simple, plain sub... */
357	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358	}
359	#endif
360	}	421	}
361		422
362	if (top_si->si_type == PERLSI_MAIN)	423	if (top_si->si_type == PERLSI_MAIN)
363	break;	424	break;
364		425
…		…
368	}	429	}
369		430
370	PUTBACK;	431	PUTBACK;
371	}	432	}
372		433
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	434	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	435	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	436	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		437	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		438	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
376		439
377	#define VAR(name,type)c->name = PL_ ## name;	440	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	441	# include "state.h"
379	#undef VAR	442	#undef VAR
380	}	443	}
…		…
383	* allocate various perl stacks. This is an exact copy	446	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	447	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	448	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	449	* not usually need a lot of stackspace.
387	*/	450	*/
		451	#if CORO_PREFER_PERL_FUNCTIONS
		452	# define coro_init_stacks init_stacks
		453	#else
388	static void	454	static void
389	coro_init_stacks ()	455	coro_init_stacks (pTHX)
390	{	456	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	457	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
392	PL_curstackinfo->si_type = PERLSI_MAIN;	458	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	459	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	460	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		461
396	PL_stack_base = AvARRAY(PL_curstack);	462	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	463	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	464	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		465
400	New(50,PL_tmps_stack,96,SV*);	466	New(50,PL_tmps_stack,128,SV*);
401	PL_tmps_floor = -1;	467	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	468	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	469	PL_tmps_max = 128;
404		470
405	New(54,PL_markstack,16,I32);	471	New(54,PL_markstack,32,I32);
406	PL_markstack_ptr = PL_markstack;	472	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	473	PL_markstack_max = PL_markstack + 32;
408		474
409	#ifdef SET_MARK_OFFSET	475	#ifdef SET_MARK_OFFSET
410	SET_MARK_OFFSET;	476	SET_MARK_OFFSET;
411	#endif	477	#endif
412		478
413	New(54,PL_scopestack,16,I32);	479	New(54,PL_scopestack,32,I32);
414	PL_scopestack_ix = 0;	480	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	481	PL_scopestack_max = 32;
416		482
417	New(54,PL_savestack,96,ANY);	483	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	484	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	485	PL_savestack_max = 64;
420		486
421	#if !PERL_VERSION_ATLEAST (5,9,0)	487	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	488	New(54,PL_retstack,16,OP*);
423	PL_retstack_ix = 0;	489	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	490	PL_retstack_max = 16;
425	#endif	491	#endif
426	}	492	}
		493	#endif
427		494
428	/*	495	/*
429	* destroy the stacks, the callchain etc...	496	* destroy the stacks, the callchain etc...
430	*/	497	*/
431	static void	498	static void
432	coro_destroy_stacks ()	499	coro_destroy_stacks (pTHX)
433	{	500	{
434	if (!IN_DESTRUCT)	501	if (!IN_DESTRUCT)
435	{	502	{
436	/* is this ugly, I ask? */	503	/* restore all saved variables and stuff */
437	LEAVE_SCOPE (0);	504	LEAVE_SCOPE (0);
		505	assert (PL_tmps_floor == -1);
438		506
439	/* sure it is, but more important: is it correct?? :/ */	507	/* free all temporaries */
440	FREETMPS;	508	FREETMPS;
		509	assert (PL_tmps_ix == -1);
441		510
		511	/* unwind all extra stacks */
442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	512	POPSTACK_TO (PL_mainstack);
		513
		514	/* unwind main stack */
		515	dounwind (-1);
443	}	516	}
444		517
445	while (PL_curstackinfo->si_next)	518	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	519	PL_curstackinfo = PL_curstackinfo->si_next;
447		520
448	while (PL_curstackinfo)	521	while (PL_curstackinfo)
449	{	522	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	523	PERL_SI *p = PL_curstackinfo->si_prev;
451		524
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	525	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	526	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		527
464	Safefree (PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	529	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	530	PL_curstackinfo = p;
467	}	531	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	537	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	538	Safefree (PL_retstack);
475	#endif	539	#endif
476	}	540	}
477		541
		542	/** coroutine stack handling ************************************************/
		543
478	static void	544	static void
479	setup_coro (struct coro *coro)	545	setup_coro (pTHX_ struct coro *coro)
480	{	546	{
481	/*	547	/*
482	* emulate part of the perl startup here.	548	* emulate part of the perl startup here.
483	*/	549	*/
484
485	coro_init_stacks ();	550	coro_init_stacks (aTHX);
486		551
		552	PL_curcop = &PL_compiling;
		553	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	554	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	555	PL_curpm = 0;
		556	PL_localizing = 0;
		557	PL_dirty = 0;
		558	PL_restartop = 0;
490		559
491	{	560	{
492	dSP;	561	dSP;
493	LOGOP myop;	562	LOGOP myop;
494		563
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));	564	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;	565	GvAV (PL_defgv) = coro->args; coro->args = 0;
500		566
501	Zero (&myop, 1, LOGOP);	567	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	568	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	569	myop.op_flags = OPf_WANT_VOID;
504		570
		571	PUSHMARK (SP);
		572	XPUSHs (av_shift (GvAV (PL_defgv)));
		573	PUTBACK;
505	PL_op = (OP *)&myop;	574	PL_op = (OP *)&myop;
506
507	PUSHMARK (SP);
508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509	PUTBACK;
510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	575	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	576	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	577	}
515	}
516		578
		579	ENTER; /* necessary e.g. for dounwind */
		580	}
		581
517	static void	582	static void
518	free_coro_mortal ()	583	free_coro_mortal (pTHX)
519	{	584	{
520	if (coro_mortal)	585	if (coro_mortal)
521	{	586	{
522	SvREFCNT_dec (coro_mortal);	587	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	588	coro_mortal = 0;
524	}	589	}
525	}	590	}
526		591
		592	/* inject a fake call to Coro::State::_cctx_init into the execution */
		593	/* _cctx_init should be careful, as it could be called at almost any time */
		594	/* during execution of a perl program */
527	static void NOINLINE	595	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	596	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	597	{
530	dSP;	598	dSP;
531	LOGOP myop;	599	LOGOP myop;
532		600
533	Zero (&myop, 1, LOGOP);	601	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	602	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		604
539	PUSHMARK (SP);	605	PUSHMARK (SP);
		606	EXTEND (SP, 2);
		607	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	608	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	609	PUTBACK;
		610	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	611	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	612	SPAGAIN;
544	}	613	}
545		614
		615	/*
		616	* this is a _very_ stripped down perl interpreter ;)
		617	*/
546	static void	618	static void
547	coro_run (void *arg)	619	coro_run (void *arg)
548	{	620	{
		621	dTHX;
		622
549	/* coro_run is the alternative epilogue of transfer() */	623	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	624	UNLOCK;
551		625
		626	PL_top_env = &PL_start_env;
		627
		628	/* inject a fake subroutine call to cctx_init */
		629	prepare_cctx (aTHX_ (coro_cctx *)arg);
		630
		631	/* somebody or something will hit me for both perl_run and PL_restartop */
		632	PL_restartop = PL_op;
		633	perl_run (PL_curinterp);
		634
552	/*	635	/*
553	* this is a _very_ stripped down perl interpreter ;)	636	* If perl-run returns we assume exit() was being called or the coro
		637	* fell off the end, which seems to be the only valid (non-bug)
		638	* reason for perl_run to return. We try to exit by jumping to the
		639	* bootstrap-time "top" top_env, as we cannot restore the "main"
		640	* coroutine as Coro has no such concept
554	*/	641	*/
555	PL_top_env = &PL_start_env;	642	PL_top_env = main_top_env;
556		643	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
557	/* inject call to cctx_init */
558	prepare_cctx ((coro_cctx *)arg);
559
560	/* somebody will hit me for both perl_run and PL_restartop */
561	perl_run (PL_curinterp);
562
563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564	abort ();
565	}	644	}
566		645
567	static coro_cctx *	646	static coro_cctx *
568	cctx_new ()	647	cctx_new ()
569	{	648	{
570	coro_cctx *cctx;	649	coro_cctx *cctx;
		650	void *stack_start;
		651	size_t stack_size;
571		652
572	++cctx_count;	653	++cctx_count;
573		654
574	New (0, cctx, 1, coro_cctx);	655	Newz (0, cctx, 1, coro_cctx);
575		656
576	#if HAVE_MMAP	657	#if HAVE_MMAP
577		658
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	659	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	660	/* mmap supposedly does allocate-on-write for us */
580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	661	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581		662
582	if (cctx->sptr == (void *)-1)	663	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	664	{
587
588	# if STACKGUARD	665	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	666	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	667	# endif
		668	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		669	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		670	cctx->mapped = 1;
		671	}
		672	else
		673	#endif
		674	{
		675	cctx->ssize = coro_stacksize * (long)sizeof (long);
		676	New (0, cctx->sptr, coro_stacksize, long);
591		677
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	678	if (!cctx->sptr)
598	{	679	{
599	perror ("FATAL: unable to malloc stack for coroutine");	680	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	681	_exit (EXIT_FAILURE);
601	}	682	}
602		683
603	#endif	684	stack_start = cctx->sptr;
		685	stack_size = cctx->ssize;
		686	}
604		687
605	#if USE_VALGRIND	688	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608	cctx->ssize + (char *)cctx->sptr
609	);
610	#endif
611
612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	689	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
613		690
614	return cctx;	691	return cctx;
615	}	692	}
616		693
617	static void	694	static void
618	cctx_free (coro_cctx *cctx)	695	cctx_destroy (coro_cctx *cctx)
619	{	696	{
620	if (!cctx)	697	if (!cctx)
621	return;	698	return;
622		699
623	--cctx_count;	700	--cctx_count;
624		701
625	#if USE_VALGRIND	702	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	703	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	704	#endif
628		705
629	#if HAVE_MMAP	706	#if HAVE_MMAP
		707	if (cctx->mapped)
630	munmap (cctx->sptr, cctx->ssize);	708	munmap (cctx->sptr, cctx->ssize);
631	#else	709	else
		710	#endif
632	Safefree (cctx->sptr);	711	Safefree (cctx->sptr);
633	#endif
634		712
635	Safefree (cctx);	713	Safefree (cctx);
636	}	714	}
637		715
638	static coro_cctx *	716	static coro_cctx *
639	cctx_get ()	717	cctx_get (pTHX)
640	{	718	{
641	coro_cctx *cctx;
642
643	if (cctx_first)	719	while (cctx_first)
644	{	720	{
		721	coro_cctx *cctx = cctx_first;
		722	cctx_first = cctx->next;
645	--cctx_idle;	723	--cctx_idle;
646	cctx = cctx_first;	724
647	cctx_first = cctx->next;	725	if (cctx->ssize >= coro_stacksize)
		726	return cctx;
		727
		728	cctx_destroy (cctx);
648	}	729	}
649	else	730
650	{
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;	731	PL_op = PL_op->op_next;
653	}
654
655	return cctx;	732	return cctx_new ();
656	}	733	}
657		734
658	static void	735	static void
659	cctx_put (coro_cctx *cctx)	736	cctx_put (coro_cctx *cctx)
660	{	737	{
		738	/* free another cctx if overlimit */
		739	if (cctx_idle >= MAX_IDLE_CCTX)
		740	{
		741	coro_cctx *first = cctx_first;
		742	cctx_first = first->next;
		743	--cctx_idle;
		744
		745	assert (!first->inuse);
		746	cctx_destroy (first);
		747	}
		748
661	++cctx_idle;	749	++cctx_idle;
662	cctx->next = cctx_first;	750	cctx->next = cctx_first;
663	cctx_first = cctx;	751	cctx_first = cctx;
664	}	752	}
665		753
		754	/** coroutine switching *****************************************************/
		755
666	/* never call directly, always through the coro_state_transfer global variable */	756	/* never call directly, always through the coro_state_transfer global variable */
667	static void NOINLINE	757	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	758	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	759	{
670	dSTACKLEVEL;	760	dSTACKLEVEL;
671		761
672	/* sometimes transfer is only called to set idle_sp */	762	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	763	if (!next)
		764	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	765	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		766	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		767	}
675	else if (prev != next)	768	else if (prev != next)
676	{	769	{
677	coro_cctx *prev__cctx;	770	coro_cctx *prev__cctx;
678		771
679	if (!prev->cctx)	772	if (prev->flags & CF_NEW)
680	{	773	{
681	/* create a new empty context */	774	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	775	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	776	prev->cctx->inuse = 1;
		777	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	778	prev->flags |= CF_RUNNING;
685	}	779	}
686		780
		781	/*TODO: must not croak here */
687	if (!prev->flags & CF_RUNNING)	782	if (!prev->flags & CF_RUNNING)
688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	783	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689		784
690	if (next->flags & CF_RUNNING)	785	if (next->flags & CF_RUNNING)
691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	786	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692		787
		788	if (next->flags & CF_DESTROYED)
		789	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		790
693	prev->flags &= ~CF_RUNNING;	791	prev->flags &= ~CF_RUNNING;
694	next->flags |= CF_RUNNING;	792	next->flags |= CF_RUNNING;
695		793
696	LOCK;	794	LOCK;
697		795
698	if (next->mainstack)	796	if (next->flags & CF_NEW)
699	{	797	{
700	/* coroutine already started */	798	/* need to start coroutine */
701	SAVE (prev, flags);	799	next->flags &= ~CF_NEW;
702	LOAD (next);	800	/* first get rid of the old state */
		801	save_perl (aTHX_ prev);
		802	/* setup coroutine call */
		803	setup_coro (aTHX_ next);
		804	/* need a new stack */
		805	assert (!next->cctx);
703	}	806	}
704	else	807	else
705	{	808	{
706	/* need to start coroutine */	809	/* coroutine already started */
707	/* first get rid of the old state */	810	save_perl (aTHX_ prev);
708	SAVE (prev, -1);	811	load_perl (aTHX_ next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	812	}
714		813
715	prev__cctx = prev->cctx;	814	prev__cctx = prev->cctx;
716		815
717	/* possibly "free" the cctx */	816	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	817	if (prev__cctx->idle_sp == STACKLEVEL)
719	{	818	{
720	assert (PL_top_env == prev__cctx->top_env);	819	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		820	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		821
		822	prev->cctx = 0;
721		823
722	cctx_put (prev__cctx);	824	cctx_put (prev__cctx);
723	prev->cctx = 0;	825	prev__cctx->inuse = 0;
724	}	826	}
725	else if (prev__cctx->idle_sp) //D
726	fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D
727		827
728	if (!next->cctx)	828	if (!next->cctx)
		829	{
729	next->cctx = cctx_get ();	830	next->cctx = cctx_get (aTHX);
		831	assert (!next->cctx->inuse);
		832	next->cctx->inuse = 1;
		833	}
730		834
731	if (prev__cctx != next->cctx)	835	if (prev__cctx != next->cctx)
732	{	836	{
733	assert ( prev__cctx->inuse);
734	assert (!next->cctx->inuse);
735
736	prev__cctx->inuse = 0;
737	next->cctx->inuse = 1;
738
739	prev__cctx->top_env = PL_top_env;	837	prev__cctx->top_env = PL_top_env;
740	PL_top_env = next->cctx->top_env;	838	PL_top_env = next->cctx->top_env;
741	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	839	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742	}	840	}
743		841
744	free_coro_mortal ();	842	free_coro_mortal (aTHX);
745
746	UNLOCK;	843	UNLOCK;
747	}	844	}
748	}	845	}
749		846
750	struct transfer_args	847	struct transfer_args
751	{	848	{
752	struct coro *prev, *next;	849	struct coro *prev, *next;
753	int flags;
754	};	850	};
755		851
756	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	852	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
757		853
		854	/** high level stuff ********************************************************/
		855
758	static void	856	static int
759	coro_state_destroy (struct coro *coro)	857	coro_state_destroy (pTHX_ struct coro *coro)
760	{	858	{
761	if (coro->refcnt--)	859	if (coro->flags & CF_DESTROYED)
762	return;	860	return 0;
763		861
		862	coro->flags |= CF_DESTROYED;
		863
764	if (coro->flags & CF_RUNNING)	864	if (coro->flags & CF_READY)
765	croak ("FATAL: tried to destroy currently running coroutine");	865	{
		866	/* reduce nready, as destroying a ready coro effectively unreadies it */
		867	/* alternative: look through all ready queues and remove the coro */
		868	LOCK;
		869	--coro_nready;
		870	UNLOCK;
		871	}
		872	else
		873	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
766		874
767	if (coro->mainstack && coro->mainstack != main_mainstack)	875	if (coro->mainstack && coro->mainstack != main_mainstack)
768	{	876	{
769	struct coro temp;	877	struct coro temp;
770		878
771	SAVE ((&temp), TRANSFER_SAVE_ALL);	879	assert (!(coro->flags & CF_RUNNING));
772	LOAD (coro);
773		880
		881	Zero (&temp, 1, struct coro);
		882	temp.save = CORO_SAVE_DEF;
		883
		884	if (coro->flags & CF_RUNNING)
		885	croak ("FATAL: tried to destroy currently running coroutine");
		886
		887	save_perl (aTHX_ &temp);
		888	load_perl (aTHX_ coro);
		889
774	coro_destroy_stacks ();	890	coro_destroy_stacks (aTHX);
775		891
776	LOAD ((&temp)); /* this will get rid of defsv etc.. */	892	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
777		893
778	coro->mainstack = 0;	894	coro->mainstack = 0;
779	}	895	}
780		896
781	cctx_free (coro->cctx);	897	cctx_destroy (coro->cctx);
782	SvREFCNT_dec (coro->args);	898	SvREFCNT_dec (coro->args);
783	Safefree (coro);	899
		900	return 1;
784	}	901	}
785		902
786	static int	903	static int
787	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	904	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
788	{	905	{
789	struct coro *coro = (struct coro *)mg->mg_ptr;	906	struct coro *coro = (struct coro *)mg->mg_ptr;
790	mg->mg_ptr = 0;	907	mg->mg_ptr = 0;
791		908
		909	if (--coro->refcnt < 0)
		910	{
792	coro_state_destroy (coro);	911	coro_state_destroy (aTHX_ coro);
		912	Safefree (coro);
		913	}
793		914
794	return 0;	915	return 0;
795	}	916	}
796		917
797	static int	918	static int
…		…
804	return 0;	925	return 0;
805	}	926	}
806		927
807	static MGVTBL coro_state_vtbl = {	928	static MGVTBL coro_state_vtbl = {
808	0, 0, 0, 0,	929	0, 0, 0, 0,
809	coro_state_clear,	930	coro_state_free,
810	0,	931	0,
811	#ifdef MGf_DUP	932	#ifdef MGf_DUP
812	coro_state_dup,	933	coro_state_dup,
813	#else	934	#else
814	# define MGf_DUP 0	935	# define MGf_DUP 0
815	#endif	936	#endif
816	};	937	};
817		938
818	static struct coro *	939	static struct coro *
819	SvSTATE (SV *coro)	940	SvSTATE_ (pTHX_ SV *coro)
820	{	941	{
821	HV *stash;	942	HV *stash;
822	MAGIC *mg;	943	MAGIC *mg;
823		944
824	if (SvROK (coro))	945	if (SvROK (coro))
…		…
830	/* very slow, but rare, check */	951	/* very slow, but rare, check */
831	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	952	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
832	croak ("Coro::State object required");	953	croak ("Coro::State object required");
833	}	954	}
834		955
835	mg = SvMAGIC (coro);	956	mg = CORO_MAGIC (coro);
836	assert (mg->mg_type == PERL_MAGIC_ext);
837	return (struct coro *)mg->mg_ptr;	957	return (struct coro *)mg->mg_ptr;
838	}	958	}
839		959
		960	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		961
840	static void	962	static void
841	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	963	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
842	{	964	{
843	ta->prev = SvSTATE (prev);	965	ta->prev = SvSTATE (prev_sv);
844	ta->next = SvSTATE (next);	966	ta->next = SvSTATE (next_sv);
845	ta->flags = flags;
846	}	967	}
847		968
848	static void	969	static void
849	api_transfer (SV *prev, SV *next, int flags)	970	api_transfer (SV *prev_sv, SV *next_sv)
850	{	971	{
851	dTHX;	972	dTHX;
852	struct transfer_args ta;	973	struct transfer_args ta;
853		974
854	prepare_transfer (&ta, prev, next, flags);	975	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
855	TRANSFER (ta);	976	TRANSFER (ta);
856	}	977	}
857		978
		979	static int
		980	api_save (SV *coro_sv, int new_save)
		981	{
		982	dTHX;
		983	struct coro *coro = SvSTATE (coro_sv);
		984	int old_save = coro->save;
		985
		986	if (new_save >= 0)
		987	coro->save = new_save;
		988
		989	return old_save;
		990	}
		991
858	/** Coro ********************************************************************/	992	/** Coro ********************************************************************/
859		993
860	#define PRIO_MAX 3
861	#define PRIO_HIGH 1
862	#define PRIO_NORMAL 0
863	#define PRIO_LOW -1
864	#define PRIO_IDLE -3
865	#define PRIO_MIN -4
866
867	/* for Coro.pm */
868	static GV *coro_current, *coro_idle;
869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870	static int coro_nready;
871
872	static void	994	static void
873	coro_enq (SV *coro_sv)	995	coro_enq (pTHX_ SV *coro_sv)
874	{	996	{
875	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	997	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	998	}
878		999
879	static SV *	1000	static SV *
880	coro_deq (int min_prio)	1001	coro_deq (pTHX_ int min_prio)
881	{	1002	{
882	int prio = PRIO_MAX - PRIO_MIN;	1003	int prio = PRIO_MAX - PRIO_MIN;
883		1004
884	min_prio -= PRIO_MIN;	1005	min_prio -= PRIO_MIN;
885	if (min_prio < 0)	1006	if (min_prio < 0)
886	min_prio = 0;	1007	min_prio = 0;
887		1008
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1009	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1010	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1011	return av_shift (coro_ready [prio]);
893	}
894		1012
895	return 0;	1013	return 0;
896	}	1014	}
897		1015
898	static int	1016	static int
899	api_ready (SV *coro_sv)	1017	api_ready (SV *coro_sv)
900	{	1018	{
		1019	dTHX;
901	struct coro *coro;	1020	struct coro *coro;
902		1021
903	if (SvROK (coro_sv))	1022	if (SvROK (coro_sv))
904	coro_sv = SvRV (coro_sv);	1023	coro_sv = SvRV (coro_sv);
905		1024
906	coro = SvSTATE (coro_sv);	1025	coro = SvSTATE (coro_sv);
907		1026
908	if (coro->flags & CF_READY)	1027	if (coro->flags & CF_READY)
909	return 0;	1028	return 0;
910		1029
911	if (coro->flags & CF_RUNNING)
912	croak ("Coro::ready called on currently running coroutine");
913
914	coro->flags |= CF_READY;	1030	coro->flags |= CF_READY;
915		1031
916	LOCK;	1032	LOCK;
917	coro_enq (SvREFCNT_inc (coro_sv));	1033	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1034	++coro_nready;
918	UNLOCK;	1035	UNLOCK;
919		1036
920	return 1;	1037	return 1;
921	}	1038	}
922		1039
923	static int	1040	static int
924	api_is_ready (SV *coro_sv)	1041	api_is_ready (SV *coro_sv)
925	{	1042	{
		1043	dTHX;
926	return !!SvSTATE (coro_sv)->flags & CF_READY;	1044	return !!(SvSTATE (coro_sv)->flags & CF_READY);
927	}	1045	}
928		1046
929	static void	1047	static void
930	prepare_schedule (struct transfer_args *ta)	1048	prepare_schedule (pTHX_ struct transfer_args *ta)
931	{	1049	{
932	SV *current, *prev, *next;	1050	SV *prev_sv, *next_sv;
933
934	current = GvSV (coro_current);
935		1051
936	for (;;)	1052	for (;;)
937	{	1053	{
938	LOCK;	1054	LOCK;
939	next = coro_deq (PRIO_MIN);	1055	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1056
		1057	/* nothing to schedule: call the idle handler */
		1058	if (!next_sv)
		1059	{
		1060	dSP;
		1061	UNLOCK;
		1062
		1063	ENTER;
		1064	SAVETMPS;
		1065
		1066	PUSHMARK (SP);
		1067	PUTBACK;
		1068	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1069
		1070	FREETMPS;
		1071	LEAVE;
		1072	continue;
		1073	}
		1074
		1075	ta->next = SvSTATE (next_sv);
		1076
		1077	/* cannot transfer to destroyed coros, skip and look for next */
		1078	if (ta->next->flags & CF_DESTROYED)
		1079	{
		1080	UNLOCK;
		1081	SvREFCNT_dec (next_sv);
		1082	/* coro_nready is already taken care of by destroy */
		1083	continue;
		1084	}
		1085
		1086	--coro_nready;
940	UNLOCK;	1087	UNLOCK;
941
942	if (next)
943	break;	1088	break;
944
945	{
946	dSP;
947
948	ENTER;
949	SAVETMPS;
950
951	PUSHMARK (SP);
952	PUTBACK;
953	call_sv (GvSV (coro_idle), G_DISCARD);
954
955	FREETMPS;
956	LEAVE;
957	}	1089	}
958	}
959
960	prev = SvRV (current);
961	SvRV (current) = next;
962		1090
963	/* free this only after the transfer */	1091	/* free this only after the transfer */
		1092	prev_sv = SvRV (coro_current);
		1093	SvRV_set (coro_current, next_sv);
		1094	ta->prev = SvSTATE (prev_sv);
		1095
		1096	assert (ta->next->flags & CF_READY);
		1097	ta->next->flags &= ~CF_READY;
		1098
964	LOCK;	1099	LOCK;
965	free_coro_mortal ();	1100	free_coro_mortal (aTHX);
		1101	coro_mortal = prev_sv;
966	UNLOCK;	1102	UNLOCK;
967	coro_mortal = prev;
968
969	ta->prev = SvSTATE (prev);
970	ta->next = SvSTATE (next);
971	ta->flags = TRANSFER_SAVE_ALL;
972
973	ta->next->flags &= ~CF_READY;
974	}	1103	}
975		1104
976	static void	1105	static void
977	prepare_cede (struct transfer_args *ta)	1106	prepare_cede (pTHX_ struct transfer_args *ta)
978	{	1107	{
979	api_ready (GvSV (coro_current));	1108	api_ready (coro_current);
980
981	prepare_schedule (ta);	1109	prepare_schedule (aTHX_ ta);
		1110	}
		1111
		1112	static int
		1113	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1114	{
		1115	if (coro_nready)
		1116	{
		1117	SV *prev = SvRV (coro_current);
		1118	prepare_schedule (aTHX_ ta);
		1119	api_ready (prev);
		1120	return 1;
		1121	}
		1122	else
		1123	return 0;
982	}	1124	}
983		1125
984	static void	1126	static void
985	api_schedule (void)	1127	api_schedule (void)
986	{	1128	{
987	dTHX;	1129	dTHX;
988	struct transfer_args ta;	1130	struct transfer_args ta;
989		1131
990	prepare_schedule (&ta);	1132	prepare_schedule (aTHX_ &ta);
991	TRANSFER (ta);	1133	TRANSFER (ta);
992	}	1134	}
993		1135
994	static void	1136	static int
995	api_cede (void)	1137	api_cede (void)
996	{	1138	{
997	dTHX;	1139	dTHX;
998	struct transfer_args ta;	1140	struct transfer_args ta;
999		1141
1000	prepare_cede (&ta);	1142	prepare_cede (aTHX_ &ta);
		1143
		1144	if (ta.prev != ta.next)
		1145	{
1001	TRANSFER (ta);	1146	TRANSFER (ta);
		1147	return 1;
		1148	}
		1149	else
		1150	return 0;
		1151	}
		1152
		1153	static int
		1154	api_cede_notself (void)
		1155	{
		1156	dTHX;
		1157	struct transfer_args ta;
		1158
		1159	if (prepare_cede_notself (aTHX_ &ta))
		1160	{
		1161	TRANSFER (ta);
		1162	return 1;
		1163	}
		1164	else
		1165	return 0;
1002	}	1166	}
1003		1167
1004	MODULE = Coro::State PACKAGE = Coro::State	1168	MODULE = Coro::State PACKAGE = Coro::State
1005		1169
1006	PROTOTYPES: DISABLE	1170	PROTOTYPES: DISABLE
…		…
1012	#endif	1176	#endif
1013	BOOT_PAGESIZE;	1177	BOOT_PAGESIZE;
1014		1178
1015	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1179	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1016		1180
1017	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1181	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1018	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1182	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1019	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1183	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1184	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1185	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1186	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1187	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1020		1188
1021	main_mainstack = PL_mainstack;	1189	main_mainstack = PL_mainstack;
		1190	main_top_env = PL_top_env;
		1191
		1192	while (main_top_env->je_prev)
		1193	main_top_env = main_top_env->je_prev;
1022		1194
1023	coroapi.ver = CORO_API_VERSION;	1195	coroapi.ver = CORO_API_VERSION;
1024	coroapi.transfer = api_transfer;	1196	coroapi.transfer = api_transfer;
1025		1197
1026	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1198	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1034	HV *hv;	1206	HV *hv;
1035	int i;	1207	int i;
1036		1208
1037	Newz (0, coro, 1, struct coro);	1209	Newz (0, coro, 1, struct coro);
1038	coro->args = newAV ();	1210	coro->args = newAV ();
		1211	coro->save = CORO_SAVE_DEF;
		1212	coro->flags = CF_NEW;
1039		1213
1040	hv = newHV ();	1214	hv = newHV ();
1041	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1215	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1042	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1216	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1043		1217
1044	for (i = 1; i < items; i++)	1218	for (i = 1; i < items; i++)
1045	av_push (coro->args, newSVsv (ST (i)));	1219	av_push (coro->args, newSVsv (ST (i)));
1046	}	1220	}
1047	OUTPUT:	1221	OUTPUT:
		1222	RETVAL
		1223
		1224	int
		1225	save (SV *coro, int new_save = -1)
		1226	CODE:
		1227	RETVAL = api_save (coro, new_save);
		1228	OUTPUT:
		1229	RETVAL
		1230
		1231	int
		1232	save_also (SV *coro_sv, int save_also)
		1233	CODE:
		1234	{
		1235	struct coro *coro = SvSTATE (coro_sv);
		1236	RETVAL = coro->save;
		1237	coro->save |= save_also;
		1238	}
		1239	OUTPUT:
1048	RETVAL	1240	RETVAL
1049		1241
1050	void	1242	void
1051	_set_stacklevel (...)	1243	_set_stacklevel (...)
1052	ALIAS:	1244	ALIAS:
1053	Coro::State::transfer = 1	1245	Coro::State::transfer = 1
1054	Coro::schedule = 2	1246	Coro::schedule = 2
1055	Coro::cede = 3	1247	Coro::cede = 3
1056	Coro::Cont::yield = 4	1248	Coro::cede_notself = 4
1057	CODE:	1249	CODE:
1058	{	1250	{
1059	struct transfer_args ta;	1251	struct transfer_args ta;
1060		1252
1061	switch (ix)	1253	switch (ix)
1062	{	1254	{
1063	case 0:	1255	case 0:
1064	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1256	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1065	ta.next = 0;	1257	ta.next = 0;
1066	ta.flags = TRANSFER_SET_STACKLEVEL;
1067	break;	1258	break;
1068		1259
1069	case 1:	1260	case 1:
1070	if (items != 3)	1261	if (items != 2)
1071	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1262	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1072		1263
1073	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1264	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1074	break;	1265	break;
1075		1266
1076	case 2:	1267	case 2:
1077	prepare_schedule (&ta);	1268	prepare_schedule (aTHX_ &ta);
1078	break;	1269	break;
1079		1270
1080	case 3:	1271	case 3:
1081	prepare_cede (&ta);	1272	prepare_cede (aTHX_ &ta);
1082	break;	1273	break;
1083		1274
1084	case 4:	1275	case 4:
1085	{	1276	if (!prepare_cede_notself (aTHX_ &ta))
1086	SV *yieldstack;	1277	XSRETURN_EMPTY;
1087	SV *sv;
1088	AV *defav = GvAV (PL_defgv);
1089		1278
1090	yieldstack = *hv_fetch (
1091	(HV *)SvRV (GvSV (coro_current)),
1092	"yieldstack", sizeof ("yieldstack") - 1,
1093	0
1094	);
1095
1096	/* set up @_ -- ugly */
1097	av_clear (defav);
1098	av_fill (defav, items - 1);
1099	while (items--)
1100	av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102	sv = av_pop ((AV *)SvRV (yieldstack));
1103	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1104	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1105	ta.flags = 0;
1106	SvREFCNT_dec (sv);
1107	}
1108	break;	1279	break;
1109
1110	}	1280	}
1111		1281
		1282	BARRIER;
1112	TRANSFER (ta);	1283	TRANSFER (ta);
1113	}
1114		1284
1115	void	1285	if (GIMME_V != G_VOID && ta.next != ta.prev)
1116	_clone_state_from (SV *dst, SV *src)	1286	XSRETURN_YES;
		1287	}
		1288
		1289	bool
		1290	_destroy (SV *coro_sv)
1117	CODE:	1291	CODE:
1118	{	1292	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1119	struct coro *coro_src = SvSTATE (src);	1293	OUTPUT:
1120		1294	RETVAL
1121	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1122
1123	++coro_src->refcnt;
1124	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1125	}
1126		1295
1127	void	1296	void
1128	_exit (code)	1297	_exit (code)
1129	int code	1298	int code
1130	PROTOTYPE: $	1299	PROTOTYPE: $
1131	CODE:	1300	CODE:
1132	_exit (code);	1301	_exit (code);
1133		1302
1134	int	1303	int
		1304	cctx_stacksize (int new_stacksize = 0)
		1305	CODE:
		1306	RETVAL = coro_stacksize;
		1307	if (new_stacksize)
		1308	coro_stacksize = new_stacksize;
		1309	OUTPUT:
		1310	RETVAL
		1311
		1312	int
1135	cctx_count ()	1313	cctx_count ()
1136	CODE:	1314	CODE:
1137	RETVAL = cctx_count;	1315	RETVAL = cctx_count;
1138	OUTPUT:	1316	OUTPUT:
1139	RETVAL	1317	RETVAL
…		…
1158	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1336	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1159	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1337	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1160	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1338	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1161	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1339	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1162		1340
1163	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1341	coro_current = get_sv ("Coro::current", FALSE);
1164	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1342	SvREADONLY_on (coro_current);
1165		1343
1166	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1344	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1167	coro_ready[i] = newAV ();	1345	coro_ready[i] = newAV ();
1168		1346
1169	{	1347	{
1170	SV *sv = perl_get_sv("Coro::API", 1);	1348	SV *sv = perl_get_sv("Coro::API", 1);
1171		1349
1172	coroapi.schedule = api_schedule;	1350	coroapi.schedule = api_schedule;
		1351	coroapi.save = api_save;
1173	coroapi.cede = api_cede;	1352	coroapi.cede = api_cede;
		1353	coroapi.cede_notself = api_cede_notself;
1174	coroapi.ready = api_ready;	1354	coroapi.ready = api_ready;
1175	coroapi.is_ready = api_is_ready;	1355	coroapi.is_ready = api_is_ready;
1176	coroapi.nready = &coro_nready;	1356	coroapi.nready = &coro_nready;
1177	coroapi.current = coro_current;	1357	coroapi.current = coro_current;
1178		1358
1179	GCoroAPI = &coroapi;	1359	GCoroAPI = &coroapi;
1180	sv_setiv (sv, (IV)&coroapi);	1360	sv_setiv (sv, (IV)&coroapi);
1181	SvREADONLY_on (sv);	1361	SvREADONLY_on (sv);
1182	}	1362	}
1183	}	1363	}
		1364
		1365	void
		1366	_set_current (SV *current)
		1367	PROTOTYPE: $
		1368	CODE:
		1369	SvREFCNT_dec (SvRV (coro_current));
		1370	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1184		1371
1185	int	1372	int
1186	prio (Coro::State coro, int newprio = 0)	1373	prio (Coro::State coro, int newprio = 0)
1187	ALIAS:	1374	ALIAS:
1188	nice = 1	1375	nice = 1
…		…
1191	RETVAL = coro->prio;	1378	RETVAL = coro->prio;
1192		1379
1193	if (items > 1)	1380	if (items > 1)
1194	{	1381	{
1195	if (ix)	1382	if (ix)
1196	newprio += coro->prio;	1383	newprio = coro->prio - newprio;
1197		1384
1198	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1385	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1199	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1386	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1200		1387
1201	coro->prio = newprio;	1388	coro->prio = newprio;
1202	}	1389	}
1203	}	1390	}
		1391	OUTPUT:
		1392	RETVAL
1204		1393
1205	SV *	1394	SV *
1206	ready (SV *self)	1395	ready (SV *self)
1207	PROTOTYPE: $	1396	PROTOTYPE: $
1208	CODE:	1397	CODE:
…		…
1230		1419
1231	SV *	1420	SV *
1232	_get_state ()	1421	_get_state ()
1233	CODE:	1422	CODE:
1234	{	1423	{
1235	struct {	1424	struct io_state *data;
1236	int errorno;
1237	int laststype;
1238	int laststatval;
1239	Stat_t statcache;
1240	} data;
1241		1425
		1426	RETVAL = newSV (sizeof (struct io_state));
		1427	data = (struct io_state *)SvPVX (RETVAL);
		1428	SvCUR_set (RETVAL, sizeof (struct io_state));
		1429	SvPOK_only (RETVAL);
		1430
1242	data.errorno = errno;	1431	data->errorno = errno;
1243	data.laststype = PL_laststype;	1432	data->laststype = PL_laststype;
1244	data.laststatval = PL_laststatval;	1433	data->laststatval = PL_laststatval;
1245	data.statcache = PL_statcache;	1434	data->statcache = PL_statcache;
1246
1247	RETVAL = newSVpvn ((char *)&data, sizeof data);
1248	}	1435	}
1249	OUTPUT:	1436	OUTPUT:
1250	RETVAL	1437	RETVAL
1251		1438
1252	void	1439	void
1253	_set_state (char *data_)	1440	_set_state (char *data_)
1254	PROTOTYPE: $	1441	PROTOTYPE: $
1255	CODE:	1442	CODE:
1256	{	1443	{
1257	struct {	1444	struct io_state *data = (void *)data_;
1258	int errorno;
1259	int laststype;
1260	int laststatval;
1261	Stat_t statcache;
1262	} *data = (void *)data_;
1263		1445
1264	errno = data->errorno;	1446	errno = data->errorno;
1265	PL_laststype = data->laststype;	1447	PL_laststype = data->laststype;
1266	PL_laststatval = data->laststatval;	1448	PL_laststatval = data->laststatval;
1267	PL_statcache = data->statcache;	1449	PL_statcache = data->statcache;
1268	}	1450	}
		1451

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