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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs.
Revision 1.211 by root, Wed Oct 10 03:37:58 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
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>	12	#include <stdio.h>
41	#include <errno.h>	13	#include <errno.h>
42		14	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	15	#include <inttypes.h> /* portable stdint.h */
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		16
51	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
52	# include <unistd.h>	18	# include <unistd.h>
53	# include <sys/mman.h>	19	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
69	#else	35	#else
70	# define PAGESIZE 0	36	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
72	#endif	38	#endif
73		39
74	/* The next macro should declare a variable stacklevel that contains and approximation	40	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	41	# include <valgrind/valgrind.h>
76	* and should be unique. */	42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	|| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
		57	# ifndef PL_ppaddr
		58	# define PL_ppaddr ppaddr
		59	# endif
		60	# ifndef call_sv
		61	# define call_sv perl_call_sv
		62	# endif
		63	# ifndef get_sv
		64	# define get_sv perl_get_sv
		65	# endif
		66	# ifndef get_cv
		67	# define get_cv perl_get_cv
		68	# endif
		69	# ifndef IS_PADGV
		70	# define IS_PADGV(v) 0
		71	# endif
		72	# ifndef IS_PADCONST
		73	# define IS_PADCONST(v) 0
		74	# endif
		75	#endif
		76
		77	/* 5.8.7 */
		78	#ifndef SvRV_set
		79	# define SvRV_set(s,v) SvRV(s) = (v)
		80	#endif
		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
		89
		90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		91	# undef CORO_STACKGUARD
		92	#endif
		93
		94	#ifndef CORO_STACKGUARD
		95	# define CORO_STACKGUARD 0
		96	#endif
		97
		98	/* prefer perl internal functions over our own? */
		99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
		102
		103	/* The next macros try to return the current stack pointer, in an as
		104	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
79		107
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		109
82	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
84	#else	114	#else
85	# define attribute(x)	115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
86	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
87		122
88	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
89		124
90	#include "CoroAPI.h"	125	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		126
94	#ifdef USE_ITHREADS	127	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	128	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	131	#else
99	# define LOCK (void)0	132	# define LOCK (void)0
100	# define UNLOCK (void)0	133	# define UNLOCK (void)0
101	#endif	134	#endif
102		135
		136	#define strpair(const) const, sizeof (const) - 1
		137
		138	/* helper storage struct for Coro::AIO */
		139	struct io_state
		140	{
		141	int errorno;
		142	I32 laststype;
		143	int laststatval;
		144	Stat_t statcache;
		145	};
		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	148	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	149	static AV *main_mainstack; /* used to differentiate between $main and others */
		150	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	151	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	152	static SV *coro_mortal; /* will be freed after next transfer */
107		153
		154	static GV *irsgv; /* $/ */
		155	static GV *stdoutgv; /* *STDOUT */
		156
		157	static HV *hv_sig; /* %SIG */
		158	static SV *sv_diehook;
		159	static SV *sv_warnhook;
		160
		161	/* async_pool helper stuff */
		162	static SV *sv_pool_rss;
		163	static SV *sv_pool_size;
		164	static AV *av_async_pool;
		165
108	static struct coro_cctx *cctx_first;	166	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	167	static int cctx_count, cctx_idle;
		168
		169	enum {
		170	CC_MAPPED = 0x01,
		171	CC_NOREUSE = 0x02, /* throw this away after tracing */
		172	CC_TRACE = 0x04,
		173	CC_TRACE_SUB = 0x08, /* trace sub calls */
		174	CC_TRACE_LINE = 0x10, /* trace each statement */
		175	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		176	};
110		177
111	/* this is a structure representing a c-level coroutine */	178	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	179	typedef struct coro_cctx {
113	struct coro_cctx *next;	180	struct coro_cctx *next;
114		181
115	/* the stack */	182	/* the stack */
116	void *sptr;	183	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	184	size_t ssize;
118		185
119	/* cpu state */	186	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	187	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		188	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	189	JMPENV *top_env;
122	coro_context cctx;	190	coro_context cctx;
123		191
124	#if USE_VALGRIND	192	#if CORO_USE_VALGRIND
125	int valgrind_id;	193	int valgrind_id;
126	#endif	194	#endif
		195	unsigned char flags;
127	} coro_cctx;	196	} coro_cctx;
		197
		198	enum {
		199	CF_RUNNING = 0x0001, /* coroutine is running */
		200	CF_READY = 0x0002, /* coroutine is ready */
		201	CF_NEW = 0x0004, /* has never been switched to */
		202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		203	};
		204
		205	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		206	typedef struct {
		207	SV *defsv;
		208	AV *defav;
		209	SV *errsv;
		210	SV *irsgv;
		211	#define VAR(name,type) type name;
		212	# include "state.h"
		213	#undef VAR
		214	} perl_slots;
		215
		216	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
128		217
129	/* this is a structure representing a perl-level coroutine */	218	/* this is a structure representing a perl-level coroutine */
130	struct coro {	219	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	220	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	221	coro_cctx *cctx;
133		222
		223	/* process data */
		224	AV *mainstack;
		225	perl_slots *slot; /* basically the saved sp */
		226
134	/* data associated with this coroutine (initial args) */	227	AV *args; /* data associated with this coroutine (initial args) */
135	AV *args;	228	int refcnt; /* coroutines are refcounted, yes */
136	int refcnt;	229	int flags; /* CF_ flags */
		230	HV *hv; /* the perl hash associated with this coro, if any */
137		231
138	/* optionally saved, might be zero */	232	/* statistics */
139	AV *defav;	233	int usecount; /* number of transfers to this coro */
140	SV *defsv;
141	SV *errsv;
142
143	#define VAR(name,type) type name;
144	# include "state.h"
145	#undef VAR
146		234
147	/* coro process data */	235	/* coro process data */
148	int prio;	236	int prio;
		237	SV *throw; /* exception to be thrown */
		238
		239	/* async_pool */
		240	SV *saved_deffh;
		241
		242	/* linked list */
		243	struct coro *next, *prev;
149	};	244	};
150		245
151	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
153		248
		249	/** Coro ********************************************************************/
		250
		251	#define PRIO_MAX 3
		252	#define PRIO_HIGH 1
		253	#define PRIO_NORMAL 0
		254	#define PRIO_LOW -1
		255	#define PRIO_IDLE -3
		256	#define PRIO_MIN -4
		257
		258	/* for Coro.pm */
		259	static SV *coro_current;
		260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		261	static int coro_nready;
		262	static struct coro *coro_first;
		263
		264	/** lowlevel stuff **********************************************************/
		265
		266	static SV *
		267	coro_get_sv (const char *name, int create)
		268	{
		269	#if PERL_VERSION_ATLEAST (5,9,0)
		270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		271	get_sv (name, create);
		272	#endif
		273	return get_sv (name, create);
		274	}
		275
154	static AV *	276	static AV *
		277	coro_get_av (const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,9,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_av (name, create);
		282	#endif
		283	return get_av (name, create);
		284	}
		285
		286	static HV *
		287	coro_get_hv (const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,9,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_hv (name, create);
		292	#endif
		293	return get_hv (name, create);
		294	}
		295
		296	static AV *
155	coro_clone_padlist (CV *cv)	297	coro_clone_padlist (pTHX_ CV *cv)
156	{	298	{
157	AV *padlist = CvPADLIST (cv);	299	AV *padlist = CvPADLIST (cv);
158	AV *newpadlist, *newpad;	300	AV *newpadlist, *newpad;
159		301
160	newpadlist = newAV ();	302	newpadlist = newAV ();
…		…
172		314
173	return newpadlist;	315	return newpadlist;
174	}	316	}
175		317
176	static void	318	static void
177	free_padlist (AV *padlist)	319	free_padlist (pTHX_ AV *padlist)
178	{	320	{
179	/* may be during global destruction */	321	/* may be during global destruction */
180	if (SvREFCNT (padlist))	322	if (SvREFCNT (padlist))
181	{	323	{
182	I32 i = AvFILLp (padlist);	324	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	345	AV *padlist;
204	AV *av = (AV *)mg->mg_obj;	346	AV *av = (AV *)mg->mg_obj;
205		347
206	/* casting is fun. */	348	/* casting is fun. */
207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	349	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208	free_padlist (padlist);	350	free_padlist (aTHX_ padlist);
209		351
210	SvREFCNT_dec (av);	352	SvREFCNT_dec (av);
211		353
212	return 0;	354	return 0;
213	}	355	}
214		356
215	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define PERL_MAGIC_coro PERL_MAGIC_ext
216		358
217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	359	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
218		360
		361	#define CORO_MAGIC(cv) \
		362	SvMAGIC (cv) \
		363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		364	? SvMAGIC (cv) \
		365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		366	: 0
		367
		368	static struct coro *
		369	SvSTATE_ (pTHX_ SV *coro)
		370	{
		371	HV *stash;
		372	MAGIC *mg;
		373
		374	if (SvROK (coro))
		375	coro = SvRV (coro);
		376
		377	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		378	croak ("Coro::State object required");
		379
		380	stash = SvSTASH (coro);
		381	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		382	{
		383	/* very slow, but rare, check */
		384	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		385	croak ("Coro::State object required");
		386	}
		387
		388	mg = CORO_MAGIC (coro);
		389	return (struct coro *)mg->mg_ptr;
		390	}
		391
		392	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		393
219	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
220	static void	395	static void
221	get_padlist (CV *cv)	396	get_padlist (pTHX_ CV *cv)
222	{	397	{
223	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	398	MAGIC *mg = CORO_MAGIC (cv);
		399	AV *av;
224		400
225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
226	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
227	else	403	else
228	{	404	{
229	#if 0	405	#if CORO_PREFER_PERL_FUNCTIONS
230	/* this is probably cleaner, but also slower? */	406	/* this is probably cleaner, but also slower? */
231	CV *cp = Perl_cv_clone (cv);	407	CV *cp = Perl_cv_clone (cv);
232	CvPADLIST (cv) = CvPADLIST (cp);	408	CvPADLIST (cv) = CvPADLIST (cp);
233	CvPADLIST (cp) = 0;	409	CvPADLIST (cp) = 0;
234	SvREFCNT_dec (cp);	410	SvREFCNT_dec (cp);
235	#else	411	#else
236	CvPADLIST (cv) = coro_clone_padlist (cv);	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
237	#endif	413	#endif
238	}	414	}
239	}	415	}
240		416
241	static void	417	static void
242	put_padlist (CV *cv)	418	put_padlist (pTHX_ CV *cv)
243	{	419	{
244	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	420	MAGIC *mg = CORO_MAGIC (cv);
		421	AV *av;
245		422
246	if (!mg)	423	if (expect_false (!mg))
247	{	424	{
248	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
249	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
250	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
251	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
252	}	429	}
253		430
254	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	431	av = (AV *)mg->mg_obj;
255	}
256		432
257	#define SB do {	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
258	#define SE } while (0)	434	av_extend (av, AvMAX (av) + 1);
259		435
260	#define LOAD(state) load_state((state));	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261	#define SAVE(state,flags) save_state((state),(flags));	437	}
262		438
263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	439	/** load & save, init *******************************************************/
264		440
265	static void	441	static void
266	load_state(Coro__State c)	442	load_perl (pTHX_ Coro__State c)
267	{	443	{
		444	perl_slots *slot = c->slot;
		445	c->slot = 0;
		446
		447	PL_mainstack = c->mainstack;
		448
		449	GvSV (PL_defgv) = slot->defsv;
		450	GvAV (PL_defgv) = slot->defav;
		451	GvSV (PL_errgv) = slot->errsv;
		452	GvSV (irsgv) = slot->irsgv;
		453
268	#define VAR(name,type) PL_ ## name = c->name;	454	#define VAR(name,type) PL_ ## name = slot->name;
269	# include "state.h"	455	# include "state.h"
270	#undef VAR	456	#undef VAR
271		457
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	458	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	459	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275		460
276	{	461	{
277	dSP;	462	dSP;
		463
278	CV *cv;	464	CV *cv;
279		465
280	/* now do the ugly restore mess */	466	/* now do the ugly restore mess */
281	while ((cv = (CV *)POPs))	467	while (expect_true (cv = (CV *)POPs))
282	{	468	{
283	AV *padlist = (AV *)POPs;
284
285	if (padlist)
286	{
287	put_padlist (cv); /* mark this padlist as available */	469	put_padlist (aTHX_ cv); /* mark this padlist as available */
288	CvPADLIST(cv) = padlist;	470	CvDEPTH (cv) = PTR2IV (POPs);
289	}	471	CvPADLIST (cv) = (AV *)POPs;
290
291	++CvDEPTH(cv);
292	}	472	}
293		473
294	PUTBACK;	474	PUTBACK;
295	}	475	}
296	}	476	}
297		477
298	static void	478	static void
299	save_state(Coro__State c, int flags)	479	save_perl (pTHX_ Coro__State c)
300	{	480	{
301	{	481	{
302	dSP;	482	dSP;
303	I32 cxix = cxstack_ix;	483	I32 cxix = cxstack_ix;
304	PERL_CONTEXT *ccstk = cxstack;	484	PERL_CONTEXT *ccstk = cxstack;
…		…
307	/*	487	/*
308	* the worst thing you can imagine happens first - we have to save	488	* the worst thing you can imagine happens first - we have to save
309	* (and reinitialize) all cv's in the whole callchain :(	489	* (and reinitialize) all cv's in the whole callchain :(
310	*/	490	*/
311		491
312	PUSHs (Nullsv);	492	XPUSHs (Nullsv);
313	/* this loop was inspired by pp_caller */	493	/* this loop was inspired by pp_caller */
314	for (;;)	494	for (;;)
315	{	495	{
316	while (cxix >= 0)	496	while (expect_true (cxix >= 0))
317	{	497	{
318	PERL_CONTEXT *cx = &ccstk[cxix--];	498	PERL_CONTEXT *cx = &ccstk[cxix--];
319		499
320	if (CxTYPE(cx) == CXt_SUB)	500	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
321	{	501	{
322	CV *cv = cx->blk_sub.cv;	502	CV *cv = cx->blk_sub.cv;
		503
323	if (CvDEPTH(cv))	504	if (expect_true (CvDEPTH (cv)))
324	{	505	{
325	EXTEND (SP, CvDEPTH(cv)*2);	506	EXTEND (SP, 3);
326
327	while (--CvDEPTH(cv))
328	{
329	/* this tells the restore code to increment CvDEPTH */
330	PUSHs (Nullsv);
331	PUSHs ((SV *)cv);
332	}
333
334	PUSHs ((SV *)CvPADLIST(cv));	507	PUSHs ((SV *)CvPADLIST (cv));
		508	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
335	PUSHs ((SV *)cv);	509	PUSHs ((SV *)cv);
336		510
		511	CvDEPTH (cv) = 0;
337	get_padlist (cv);	512	get_padlist (aTHX_ cv);
338	}	513	}
339	}	514	}
340	#ifdef CXt_FORMAT
341	else if (CxTYPE(cx) == CXt_FORMAT)
342	{
343	/* I never used formats, so how should I know how these are implemented? */
344	/* my bold guess is as a simple, plain sub... */
345	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
346	}
347	#endif
348	}	515	}
349		516
350	if (top_si->si_type == PERLSI_MAIN)	517	if (expect_true (top_si->si_type == PERLSI_MAIN))
351	break;	518	break;
352		519
353	top_si = top_si->si_prev;	520	top_si = top_si->si_prev;
354	ccstk = top_si->si_cxstack;	521	ccstk = top_si->si_cxstack;
355	cxix = top_si->si_cxix;	522	cxix = top_si->si_cxix;
356	}	523	}
357		524
358	PUTBACK;	525	PUTBACK;
359	}	526	}
360		527
361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	528	/* allocate some space on the context stack for our purposes */
362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	529	/* we manually unroll here, as usually 2 slots is enough */
363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	530	if (SLOT_COUNT >= 1) CXINC;
		531	if (SLOT_COUNT >= 2) CXINC;
		532	if (SLOT_COUNT >= 3) CXINC;
		533	{
		534	int i;
		535	for (i = 3; i < SLOT_COUNT; ++i)
		536	CXINC;
		537	}
		538	cxstack_ix -= SLOT_COUNT; /* undo allocation */
364		539
		540	c->mainstack = PL_mainstack;
		541
		542	{
		543	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		544
		545	slot->defav = GvAV (PL_defgv);
		546	slot->defsv = DEFSV;
		547	slot->errsv = ERRSV;
		548	slot->irsgv = GvSV (irsgv);
		549
365	#define VAR(name,type)c->name = PL_ ## name;	550	#define VAR(name,type) slot->name = PL_ ## name;
366	# include "state.h"	551	# include "state.h"
367	#undef VAR	552	#undef VAR
		553	}
368	}	554	}
369		555
370	/*	556	/*
371	* allocate various perl stacks. This is an exact copy	557	* allocate various perl stacks. This is an exact copy
372	* of perl.c:init_stacks, except that it uses less memory	558	* of perl.c:init_stacks, except that it uses less memory
373	* on the (sometimes correct) assumption that coroutines do	559	* on the (sometimes correct) assumption that coroutines do
374	* not usually need a lot of stackspace.	560	* not usually need a lot of stackspace.
375	*/	561	*/
		562	#if CORO_PREFER_PERL_FUNCTIONS
		563	# define coro_init_stacks init_stacks
		564	#else
376	static void	565	static void
377	coro_init_stacks ()	566	coro_init_stacks (pTHX)
378	{	567	{
379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	568	PL_curstackinfo = new_stackinfo(32, 8);
380	PL_curstackinfo->si_type = PERLSI_MAIN;	569	PL_curstackinfo->si_type = PERLSI_MAIN;
381	PL_curstack = PL_curstackinfo->si_stack;	570	PL_curstack = PL_curstackinfo->si_stack;
382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	571	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
383		572
384	PL_stack_base = AvARRAY(PL_curstack);	573	PL_stack_base = AvARRAY(PL_curstack);
385	PL_stack_sp = PL_stack_base;	574	PL_stack_sp = PL_stack_base;
386	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	575	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
387		576
388	New(50,PL_tmps_stack,96,SV*);	577	New(50,PL_tmps_stack,32,SV*);
389	PL_tmps_floor = -1;	578	PL_tmps_floor = -1;
390	PL_tmps_ix = -1;	579	PL_tmps_ix = -1;
391	PL_tmps_max = 96;	580	PL_tmps_max = 32;
392		581
393	New(54,PL_markstack,16,I32);	582	New(54,PL_markstack,16,I32);
394	PL_markstack_ptr = PL_markstack;	583	PL_markstack_ptr = PL_markstack;
395	PL_markstack_max = PL_markstack + 16;	584	PL_markstack_max = PL_markstack + 16;
396		585
397	#ifdef SET_MARK_OFFSET	586	#ifdef SET_MARK_OFFSET
398	SET_MARK_OFFSET;	587	SET_MARK_OFFSET;
399	#endif	588	#endif
400		589
401	New(54,PL_scopestack,16,I32);	590	New(54,PL_scopestack,8,I32);
402	PL_scopestack_ix = 0;	591	PL_scopestack_ix = 0;
403	PL_scopestack_max = 16;	592	PL_scopestack_max = 8;
404		593
405	New(54,PL_savestack,96,ANY);	594	New(54,PL_savestack,24,ANY);
406	PL_savestack_ix = 0;	595	PL_savestack_ix = 0;
407	PL_savestack_max = 96;	596	PL_savestack_max = 24;
408		597
409	#if !PERL_VERSION_ATLEAST (5,9,0)	598	#if !PERL_VERSION_ATLEAST (5,9,0)
410	New(54,PL_retstack,8,OP*);	599	New(54,PL_retstack,4,OP*);
411	PL_retstack_ix = 0;	600	PL_retstack_ix = 0;
412	PL_retstack_max = 8;	601	PL_retstack_max = 4;
413	#endif	602	#endif
414	}	603	}
		604	#endif
415		605
416	/*	606	/*
417	* destroy the stacks, the callchain etc...	607	* destroy the stacks, the callchain etc...
418	*/	608	*/
419	static void	609	static void
420	coro_destroy_stacks ()	610	coro_destroy_stacks (pTHX)
421	{	611	{
422	if (!IN_DESTRUCT)
423	{
424	/* is this ugly, I ask? */
425	LEAVE_SCOPE (0);
426
427	/* sure it is, but more important: is it correct?? :/ */
428	FREETMPS;
429
430	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
431	}
432
433	while (PL_curstackinfo->si_next)	612	while (PL_curstackinfo->si_next)
434	PL_curstackinfo = PL_curstackinfo->si_next;	613	PL_curstackinfo = PL_curstackinfo->si_next;
435		614
436	while (PL_curstackinfo)	615	while (PL_curstackinfo)
437	{	616	{
438	PERL_SI *p = PL_curstackinfo->si_prev;	617	PERL_SI *p = PL_curstackinfo->si_prev;
439		618
440	{ /*D*//*remove*/
441	dSP;
442	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
443	PUTBACK; /* possibly superfluous */
444	}
445
446	if (!IN_DESTRUCT)	619	if (!IN_DESTRUCT)
447	{
448	dounwind (-1);/*D*//*remove*/
449	SvREFCNT_dec (PL_curstackinfo->si_stack);	620	SvREFCNT_dec (PL_curstackinfo->si_stack);
450	}
451		621
452	Safefree (PL_curstackinfo->si_cxstack);	622	Safefree (PL_curstackinfo->si_cxstack);
453	Safefree (PL_curstackinfo);	623	Safefree (PL_curstackinfo);
454	PL_curstackinfo = p;	624	PL_curstackinfo = p;
455	}	625	}
…		…
461	#if !PERL_VERSION_ATLEAST (5,9,0)	631	#if !PERL_VERSION_ATLEAST (5,9,0)
462	Safefree (PL_retstack);	632	Safefree (PL_retstack);
463	#endif	633	#endif
464	}	634	}
465		635
466	static void	636	static size_t
467	setup_coro (struct coro *coro)	637	coro_rss (pTHX_ struct coro *coro)
		638	{
		639	size_t rss = sizeof (*coro);
		640
		641	if (coro->mainstack)
		642	{
		643	perl_slots tmp_slot;
		644	perl_slots *slot;
		645
		646	if (coro->flags & CF_RUNNING)
		647	{
		648	slot = &tmp_slot;
		649
		650	#define VAR(name,type) slot->name = PL_ ## name;
		651	# include "state.h"
		652	#undef VAR
		653	}
		654	else
		655	slot = coro->slot;
		656
		657	rss += sizeof (slot->curstackinfo);
		658	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		659	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		660	rss += slot->tmps_max * sizeof (SV *);
		661	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		662	rss += slot->scopestack_max * sizeof (I32);
		663	rss += slot->savestack_max * sizeof (ANY);
		664
		665	#if !PERL_VERSION_ATLEAST (5,9,0)
		666	rss += slot->retstack_max * sizeof (OP *);
		667	#endif
		668	}
		669
		670	return rss;
		671	}
		672
		673	/** coroutine stack handling ************************************************/
		674
		675	static void
		676	coro_setup (pTHX_ struct coro *coro)
468	{	677	{
469	/*	678	/*
470	* emulate part of the perl startup here.	679	* emulate part of the perl startup here.
471	*/	680	*/
472
473	coro_init_stacks ();	681	coro_init_stacks (aTHX);
474		682
		683	PL_runops = RUNOPS_DEFAULT;
		684	PL_curcop = &PL_compiling;
		685	PL_in_eval = EVAL_NULL;
475	PL_curcop = 0;	686	PL_comppad = 0;
476	PL_in_eval = 0;
477	PL_curpm = 0;	687	PL_curpm = 0;
		688	PL_curpad = 0;
		689	PL_localizing = 0;
		690	PL_dirty = 0;
		691	PL_restartop = 0;
		692	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		693	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		694
		695	GvSV (PL_defgv) = newSV (0);
		696	GvAV (PL_defgv) = coro->args; coro->args = 0;
		697	GvSV (PL_errgv) = newSV (0);
		698	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		699	PL_rs = newSVsv (GvSV (irsgv));
		700	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
478		701
479	{	702	{
480	dSP;	703	dSP;
481	LOGOP myop;	704	LOGOP myop;
482		705
483	/* I have no idea why this is needed, but it is */
484	PUSHMARK (SP);
485
486	SvREFCNT_dec (GvAV (PL_defgv));
487	GvAV (PL_defgv) = coro->args; coro->args = 0;
488
489	Zero (&myop, 1, LOGOP);	706	Zero (&myop, 1, LOGOP);
490	myop.op_next = Nullop;	707	myop.op_next = Nullop;
491	myop.op_flags = OPf_WANT_VOID;	708	myop.op_flags = OPf_WANT_VOID;
492		709
		710	PUSHMARK (SP);
		711	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		712	PUTBACK;
493	PL_op = (OP *)&myop;	713	PL_op = (OP *)&myop;
494
495	PUSHMARK (SP);
496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
497	PUTBACK;
498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	714	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
499	SPAGAIN;	715	SPAGAIN;
500
501	ENTER; /* necessary e.g. for dounwind */
502	}	716	}
503	}
504		717
		718	/* this newly created coroutine might be run on an existing cctx which most
		719	* likely was suspended in set_stacklevel, called from entersub.
		720	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		721	* so we ENTER here for symmetry
		722	*/
		723	ENTER;
		724	}
		725
505	static void	726	static void
		727	coro_destroy (pTHX_ struct coro *coro)
		728	{
		729	if (!IN_DESTRUCT)
		730	{
		731	/* restore all saved variables and stuff */
		732	LEAVE_SCOPE (0);
		733	assert (PL_tmps_floor == -1);
		734
		735	/* free all temporaries */
		736	FREETMPS;
		737	assert (PL_tmps_ix == -1);
		738
		739	/* unwind all extra stacks */
		740	POPSTACK_TO (PL_mainstack);
		741
		742	/* unwind main stack */
		743	dounwind (-1);
		744	}
		745
		746	SvREFCNT_dec (GvSV (PL_defgv));
		747	SvREFCNT_dec (GvAV (PL_defgv));
		748	SvREFCNT_dec (GvSV (PL_errgv));
		749	SvREFCNT_dec (PL_defoutgv);
		750	SvREFCNT_dec (PL_rs);
		751	SvREFCNT_dec (GvSV (irsgv));
		752
		753	SvREFCNT_dec (PL_diehook);
		754	SvREFCNT_dec (PL_warnhook);
		755
		756	SvREFCNT_dec (coro->saved_deffh);
		757	SvREFCNT_dec (coro->throw);
		758
		759	coro_destroy_stacks (aTHX);
		760	}
		761
		762	static void
506	free_coro_mortal ()	763	free_coro_mortal (pTHX)
507	{	764	{
508	if (coro_mortal)	765	if (expect_true (coro_mortal))
509	{	766	{
510	SvREFCNT_dec (coro_mortal);	767	SvREFCNT_dec (coro_mortal);
511	coro_mortal = 0;	768	coro_mortal = 0;
512	}	769	}
513	}	770	}
514		771
		772	static int
		773	runops_trace (pTHX)
		774	{
		775	COP *oldcop = 0;
		776	int oldcxix = -2;
		777	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		778	coro_cctx *cctx = coro->cctx;
		779
		780	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		781	{
		782	PERL_ASYNC_CHECK ();
		783
		784	if (cctx->flags & CC_TRACE_ALL)
		785	{
		786	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		787	{
		788	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		789	SV **bot, **top;
		790	AV *av = newAV (); /* return values */
		791	SV **cb;
		792	dSP;
		793
		794	GV *gv = CvGV (cx->blk_sub.cv);
		795	SV *fullname = sv_2mortal (newSV (0));
		796	if (isGV (gv))
		797	gv_efullname3 (fullname, gv, 0);
		798
		799	bot = PL_stack_base + cx->blk_oldsp + 1;
		800	top = cx->blk_gimme == G_ARRAY ? SP + 1
		801	: cx->blk_gimme == G_SCALAR ? bot + 1
		802	: bot;
		803
		804	av_extend (av, top - bot);
		805	while (bot < top)
		806	av_push (av, SvREFCNT_inc (*bot++));
		807
		808	PL_runops = RUNOPS_DEFAULT;
		809	ENTER;
		810	SAVETMPS;
		811	EXTEND (SP, 3);
		812	PUSHMARK (SP);
		813	PUSHs (&PL_sv_no);
		814	PUSHs (fullname);
		815	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		816	PUTBACK;
		817	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		818	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		819	SPAGAIN;
		820	FREETMPS;
		821	LEAVE;
		822	PL_runops = runops_trace;
		823	}
		824
		825	if (oldcop != PL_curcop)
		826	{
		827	oldcop = PL_curcop;
		828
		829	if (PL_curcop != &PL_compiling)
		830	{
		831	SV **cb;
		832
		833	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		834	{
		835	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		836
		837	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		838	{
		839	runops_proc_t old_runops = PL_runops;
		840	dSP;
		841	GV *gv = CvGV (cx->blk_sub.cv);
		842	SV *fullname = sv_2mortal (newSV (0));
		843
		844	if (isGV (gv))
		845	gv_efullname3 (fullname, gv, 0);
		846
		847	PL_runops = RUNOPS_DEFAULT;
		848	ENTER;
		849	SAVETMPS;
		850	EXTEND (SP, 3);
		851	PUSHMARK (SP);
		852	PUSHs (&PL_sv_yes);
		853	PUSHs (fullname);
		854	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		855	PUTBACK;
		856	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		857	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		858	SPAGAIN;
		859	FREETMPS;
		860	LEAVE;
		861	PL_runops = runops_trace;
		862	}
		863
		864	oldcxix = cxstack_ix;
		865	}
		866
		867	if (cctx->flags & CC_TRACE_LINE)
		868	{
		869	dSP;
		870
		871	PL_runops = RUNOPS_DEFAULT;
		872	ENTER;
		873	SAVETMPS;
		874	EXTEND (SP, 3);
		875	PL_runops = RUNOPS_DEFAULT;
		876	PUSHMARK (SP);
		877	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		878	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		879	PUTBACK;
		880	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		881	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		882	SPAGAIN;
		883	FREETMPS;
		884	LEAVE;
		885	PL_runops = runops_trace;
		886	}
		887	}
		888	}
		889	}
		890	}
		891
		892	TAINT_NOT;
		893	return 0;
		894	}
		895
		896	/* inject a fake call to Coro::State::_cctx_init into the execution */
		897	/* _cctx_init should be careful, as it could be called at almost any time */
		898	/* during execution of a perl program */
515	static void NOINLINE	899	static void NOINLINE
516	prepare_cctx (coro_cctx *cctx)	900	cctx_prepare (pTHX_ coro_cctx *cctx)
517	{	901	{
518	dSP;	902	dSP;
519	LOGOP myop;	903	LOGOP myop;
520		904
		905	PL_top_env = &PL_start_env;
		906
		907	if (cctx->flags & CC_TRACE)
		908	PL_runops = runops_trace;
		909
521	Zero (&myop, 1, LOGOP);	910	Zero (&myop, 1, LOGOP);
522	myop.op_next = PL_op;	911	myop.op_next = PL_op;
523	myop.op_flags = OPf_WANT_VOID;	912	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
524
525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
526		913
527	PUSHMARK (SP);	914	PUSHMARK (SP);
		915	EXTEND (SP, 2);
		916	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	917	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
529	PUTBACK;	918	PUTBACK;
		919	PL_op = (OP *)&myop;
530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	920	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
531	SPAGAIN;	921	SPAGAIN;
532	}	922	}
533		923
		924	/*
		925	* this is a _very_ stripped down perl interpreter ;)
		926	*/
534	static void	927	static void
535	coro_run (void *arg)	928	cctx_run (void *arg)
536	{	929	{
		930	dTHX;
		931
537	/* coro_run is the alternative epilogue of transfer() */	932	/* cctx_run is the alternative tail of transfer(), so unlock here. */
538	UNLOCK;	933	UNLOCK;
539		934
		935	/* we now skip the entersub that lead to transfer() */
		936	PL_op = PL_op->op_next;
		937
		938	/* inject a fake subroutine call to cctx_init */
		939	cctx_prepare (aTHX_ (coro_cctx *)arg);
		940
		941	/* somebody or something will hit me for both perl_run and PL_restartop */
		942	PL_restartop = PL_op;
		943	perl_run (PL_curinterp);
		944
540	/*	945	/*
541	* this is a _very_ stripped down perl interpreter ;)	946	* If perl-run returns we assume exit() was being called or the coro
		947	* fell off the end, which seems to be the only valid (non-bug)
		948	* reason for perl_run to return. We try to exit by jumping to the
		949	* bootstrap-time "top" top_env, as we cannot restore the "main"
		950	* coroutine as Coro has no such concept
542	*/	951	*/
543	PL_top_env = &PL_start_env;	952	PL_top_env = main_top_env;
544		953	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
545	/* inject call to cctx_init */
546	prepare_cctx ((coro_cctx *)arg);
547
548	/* somebody will hit me for both perl_run and PL_restartop */
549	perl_run (PL_curinterp);
550
551	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
552	abort ();
553	}	954	}
554		955
555	static coro_cctx *	956	static coro_cctx *
556	cctx_new ()	957	cctx_new ()
557	{	958	{
558	coro_cctx *cctx;	959	coro_cctx *cctx;
		960	void *stack_start;
		961	size_t stack_size;
559		962
560	++cctx_count;	963	++cctx_count;
561		964
562	New (0, cctx, 1, coro_cctx);	965	Newz (0, cctx, 1, coro_cctx);
563		966
564	#if HAVE_MMAP	967	#if HAVE_MMAP
565
566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	968	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
567	/* mmap suppsedly does allocate-on-write for us */	969	/* mmap supposedly does allocate-on-write for us */
568	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	970	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
569		971
570	if (cctx->sptr == (void *)-1)	972	if (cctx->sptr != (void *)-1)
571	{
572	perror ("FATAL: unable to mmap stack for coroutine");
573	_exit (EXIT_FAILURE);
574	}	973	{
575
576	# if STACKGUARD	974	# if CORO_STACKGUARD
577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	975	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
578	# endif	976	# endif
		977	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		978	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		979	cctx->flags |= CC_MAPPED;
		980	}
		981	else
		982	#endif
		983	{
		984	cctx->ssize = coro_stacksize * (long)sizeof (long);
		985	New (0, cctx->sptr, coro_stacksize, long);
579		986
580	#else
581
582	cctx->ssize = STACKSIZE * (long)sizeof (long);
583	New (0, cctx->sptr, STACKSIZE, long);
584
585	if (!cctx->sptr)	987	if (!cctx->sptr)
586	{	988	{
587	perror ("FATAL: unable to malloc stack for coroutine");	989	perror ("FATAL: unable to allocate stack for coroutine");
588	_exit (EXIT_FAILURE);	990	_exit (EXIT_FAILURE);
589	}	991	}
590		992
591	#endif	993	stack_start = cctx->sptr;
		994	stack_size = cctx->ssize;
		995	}
592		996
593	#if USE_VALGRIND	997	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
594	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	998	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
595	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
596	cctx->ssize + (char *)cctx->sptr
597	);
598	#endif
599
600	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
601		999
602	return cctx;	1000	return cctx;
603	}	1001	}
604		1002
605	static void	1003	static void
606	cctx_free (coro_cctx *cctx)	1004	cctx_destroy (coro_cctx *cctx)
607	{	1005	{
608	if (!cctx)	1006	if (!cctx)
609	return;	1007	return;
610		1008
611	--cctx_count;	1009	--cctx_count;
612		1010
613	#if USE_VALGRIND	1011	#if CORO_USE_VALGRIND
614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1012	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
615	#endif	1013	#endif
616		1014
617	#if HAVE_MMAP	1015	#if HAVE_MMAP
		1016	if (cctx->flags & CC_MAPPED)
618	munmap (cctx->sptr, cctx->ssize);	1017	munmap (cctx->sptr, cctx->ssize);
619	#else	1018	else
		1019	#endif
620	Safefree (cctx->sptr);	1020	Safefree (cctx->sptr);
621	#endif
622		1021
623	Safefree (cctx);	1022	Safefree (cctx);
624	}	1023	}
625		1024
		1025	/* wether this cctx should be destructed */
		1026	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1027
626	static coro_cctx *	1028	static coro_cctx *
627	cctx_get ()	1029	cctx_get (pTHX)
628	{	1030	{
629	coro_cctx *cctx;	1031	while (expect_true (cctx_first))
630
631	if (cctx_first)
632	{	1032	{
		1033	coro_cctx *cctx = cctx_first;
		1034	cctx_first = cctx->next;
633	--cctx_idle;	1035	--cctx_idle;
634	cctx = cctx_first;	1036
635	cctx_first = cctx->next;	1037	if (expect_true (!CCTX_EXPIRED (cctx)))
636	}	1038	return cctx;
637	else	1039
638	{	1040	cctx_destroy (cctx);
639	cctx = cctx_new ();
640	PL_op = PL_op->op_next;
641	}	1041	}
642		1042
643	return cctx;	1043	return cctx_new ();
644	}	1044	}
645		1045
646	static void	1046	static void
647	cctx_put (coro_cctx *cctx)	1047	cctx_put (coro_cctx *cctx)
648	{	1048	{
		1049	/* free another cctx if overlimit */
		1050	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1051	{
		1052	coro_cctx *first = cctx_first;
		1053	cctx_first = first->next;
		1054	--cctx_idle;
		1055
		1056	cctx_destroy (first);
		1057	}
		1058
649	++cctx_idle;	1059	++cctx_idle;
650	cctx->next = cctx_first;	1060	cctx->next = cctx_first;
651	cctx_first = cctx;	1061	cctx_first = cctx;
652	}	1062	}
653		1063
654	/* never call directly, always through the coro_state_transfer global variable */	1064	/** coroutine switching *****************************************************/
		1065
		1066	static void
		1067	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1068	{
		1069	if (expect_true (prev != next))
		1070	{
		1071	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1072	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1073
		1074	if (expect_false (next->flags & CF_RUNNING))
		1075	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1076
		1077	if (expect_false (next->flags & CF_DESTROYED))
		1078	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1079
		1080	if (
		1081	#if PERL_VERSION_ATLEAST (5,9,0)
		1082	expect_false (PL_parser)
		1083	#else
		1084	expect_false (PL_lex_state != LEX_NOTPARSING)
		1085	#endif
		1086	)
		1087	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1088	}
		1089	}
		1090
		1091	/* always use the TRANSFER macro */
655	static void NOINLINE	1092	static void NOINLINE
656	transfer (struct coro *prev, struct coro *next, int flags)	1093	transfer (pTHX_ struct coro *prev, struct coro *next)
657	{	1094	{
658	dSTACKLEVEL;	1095	dSTACKLEVEL;
659		1096
660	/* sometimes transfer is only called to set idle_sp */	1097	/* sometimes transfer is only called to set idle_sp */
661	if (flags == TRANSFER_SET_STACKLEVEL)	1098	if (expect_false (!next))
		1099	{
662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1100	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1101	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1102	}
663	else if (prev != next)	1103	else if (expect_true (prev != next))
664	{	1104	{
665	coro_cctx *prev__cctx;	1105	coro_cctx *prev__cctx;
666		1106
		1107	if (expect_false (prev->flags & CF_NEW))
		1108	{
		1109	/* create a new empty context */
		1110	Newz (0, prev->cctx, 1, coro_cctx);
		1111	prev->flags &= ~CF_NEW;
		1112	prev->flags |= CF_RUNNING;
		1113	}
		1114
		1115	prev->flags &= ~CF_RUNNING;
		1116	next->flags |= CF_RUNNING;
		1117
667	LOCK;	1118	LOCK;
668		1119
669	if (next->mainstack)	1120	if (expect_false (next->flags & CF_NEW))
670	{	1121	{
671	/* coroutine already started */	1122	/* need to start coroutine */
672	SAVE (prev, flags);	1123	next->flags &= ~CF_NEW;
673	LOAD (next);	1124	/* first get rid of the old state */
		1125	save_perl (aTHX_ prev);
		1126	/* setup coroutine call */
		1127	coro_setup (aTHX_ next);
674	}	1128	}
675	else	1129	else
676	{	1130	{
677	/* need to start coroutine */	1131	/* coroutine already started */
678	/* first get rid of the old state */	1132	save_perl (aTHX_ prev);
679	SAVE (prev, -1);	1133	load_perl (aTHX_ next);
680	/* setup coroutine call */
681	setup_coro (next);
682	/* need a stack */
683	next->cctx = 0;
684	}	1134	}
685		1135
686	if (!prev->cctx)
687	/* create a new empty context */
688	Newz (0, prev->cctx, 1, coro_cctx);
689
690	prev__cctx = prev->cctx;	1136	prev__cctx = prev->cctx;
691		1137
692	/* possibly "free" the cctx */	1138	/* possibly "free" the cctx */
693	if (prev__cctx->idle_sp == STACKLEVEL)	1139	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
694	{	1140	{
		1141	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1142	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1143
		1144	prev->cctx = 0;
		1145
		1146	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1147	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1148	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1149	if (!next->cctx)
		1150	next->cctx = cctx_get (aTHX);
		1151
695	cctx_put (prev__cctx);	1152	cctx_put (prev__cctx);
696	prev->cctx = 0;
697	}	1153	}
698		1154
		1155	++next->usecount;
		1156
699	if (!next->cctx)	1157	if (expect_true (!next->cctx))
700	next->cctx = cctx_get ();	1158	next->cctx = cctx_get (aTHX);
701		1159
702	if (prev__cctx != next->cctx)	1160	if (expect_false (prev__cctx != next->cctx))
703	{	1161	{
704	prev__cctx->top_env = PL_top_env;	1162	prev__cctx->top_env = PL_top_env;
705	PL_top_env = next->cctx->top_env;	1163	PL_top_env = next->cctx->top_env;
706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1164	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
707	}	1165	}
708		1166
709	free_coro_mortal ();	1167	free_coro_mortal (aTHX);
710
711	UNLOCK;	1168	UNLOCK;
		1169
		1170	if (expect_false (prev->throw || next->throw))
		1171	{
		1172	struct coro *coro = SvSTATE (coro_current);
		1173
		1174	if (coro->throw)
		1175	{
		1176	SV *exception = coro->throw;
		1177	coro->throw = 0;
		1178	sv_setsv (ERRSV, exception);
		1179	croak (0);
		1180	}
		1181	}
712	}	1182	}
713	}	1183	}
714		1184
715	struct transfer_args	1185	struct transfer_args
716	{	1186	{
717	struct coro *prev, *next;	1187	struct coro *prev, *next;
718	int flags;
719	};	1188	};
720		1189
721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1190	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1191	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
722		1192
		1193	/** high level stuff ********************************************************/
		1194
723	static void	1195	static int
724	coro_state_destroy (struct coro *coro)	1196	coro_state_destroy (pTHX_ struct coro *coro)
725	{	1197	{
726	if (coro->refcnt--)	1198	if (coro->flags & CF_DESTROYED)
727	return;	1199	return 0;
		1200
		1201	coro->flags |= CF_DESTROYED;
		1202
		1203	if (coro->flags & CF_READY)
		1204	{
		1205	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1206	/* alternative: look through all ready queues and remove the coro */
		1207	LOCK;
		1208	--coro_nready;
		1209	UNLOCK;
		1210	}
		1211	else
		1212	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
728		1213
729	if (coro->mainstack && coro->mainstack != main_mainstack)	1214	if (coro->mainstack && coro->mainstack != main_mainstack)
730	{	1215	{
731	struct coro temp;	1216	struct coro temp;
732		1217
733	SAVE ((&temp), TRANSFER_SAVE_ALL);	1218	if (coro->flags & CF_RUNNING)
734	LOAD (coro);	1219	croak ("FATAL: tried to destroy currently running coroutine");
735		1220
736	coro_destroy_stacks ();	1221	save_perl (aTHX_ &temp);
		1222	load_perl (aTHX_ coro);
737		1223
738	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1224	coro_destroy (aTHX_ coro);
739		1225
		1226	load_perl (aTHX_ &temp);
		1227
740	coro->mainstack = 0;	1228	coro->slot = 0;
741	}	1229	}
742		1230
743	cctx_free (coro->cctx);	1231	cctx_destroy (coro->cctx);
744	SvREFCNT_dec (coro->args);	1232	SvREFCNT_dec (coro->args);
745	Safefree (coro);	1233
		1234	if (coro->next) coro->next->prev = coro->prev;
		1235	if (coro->prev) coro->prev->next = coro->next;
		1236	if (coro == coro_first) coro_first = coro->next;
		1237
		1238	return 1;
746	}	1239	}
747		1240
748	static int	1241	static int
749	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1242	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
750	{	1243	{
751	struct coro *coro = (struct coro *)mg->mg_ptr;	1244	struct coro *coro = (struct coro *)mg->mg_ptr;
752	mg->mg_ptr = 0;	1245	mg->mg_ptr = 0;
753		1246
		1247	coro->hv = 0;
		1248
		1249	if (--coro->refcnt < 0)
		1250	{
754	coro_state_destroy (coro);	1251	coro_state_destroy (aTHX_ coro);
		1252	Safefree (coro);
		1253	}
755		1254
756	return 0;	1255	return 0;
757	}	1256	}
758		1257
759	static int	1258	static int
…		…
766	return 0;	1265	return 0;
767	}	1266	}
768		1267
769	static MGVTBL coro_state_vtbl = {	1268	static MGVTBL coro_state_vtbl = {
770	0, 0, 0, 0,	1269	0, 0, 0, 0,
771	coro_state_clear,	1270	coro_state_free,
772	0,	1271	0,
773	#ifdef MGf_DUP	1272	#ifdef MGf_DUP
774	coro_state_dup,	1273	coro_state_dup,
775	#else	1274	#else
776	# define MGf_DUP 0	1275	# define MGf_DUP 0
777	#endif	1276	#endif
778	};	1277	};
779		1278
780	static struct coro *
781	SvSTATE (SV *coro)
782	{
783	HV *stash;
784	MAGIC *mg;
785
786	if (SvROK (coro))
787	coro = SvRV (coro);
788
789	stash = SvSTASH (coro);
790	if (stash != coro_stash && stash != coro_state_stash)
791	{
792	/* very slow, but rare, check */
793	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
794	croak ("Coro::State object required");
795	}
796
797	mg = SvMAGIC (coro);
798	assert (mg->mg_type == PERL_MAGIC_ext);
799	return (struct coro *)mg->mg_ptr;
800	}
801
802	static void	1279	static void
803	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1280	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
804	{	1281	{
805	ta->prev = SvSTATE (prev);	1282	ta->prev = SvSTATE (prev_sv);
806	ta->next = SvSTATE (next);	1283	ta->next = SvSTATE (next_sv);
807	ta->flags = flags;	1284	TRANSFER_CHECK (*ta);
808	}	1285	}
809		1286
810	static void	1287	static void
811	api_transfer (SV *prev, SV *next, int flags)	1288	api_transfer (SV *prev_sv, SV *next_sv)
812	{	1289	{
813	dTHX;	1290	dTHX;
814	struct transfer_args ta;	1291	struct transfer_args ta;
815		1292
816	prepare_transfer (&ta, prev, next, flags);	1293	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
817	TRANSFER (ta);	1294	TRANSFER (ta);
818	}	1295	}
819		1296
820	/** Coro ********************************************************************/	1297	/** Coro ********************************************************************/
821		1298
822	#define PRIO_MAX 3
823	#define PRIO_HIGH 1
824	#define PRIO_NORMAL 0
825	#define PRIO_LOW -1
826	#define PRIO_IDLE -3
827	#define PRIO_MIN -4
828
829	/* for Coro.pm */
830	static GV *coro_current, *coro_idle;
831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832	static int coro_nready;
833
834	static void	1299	static void
835	coro_enq (SV *sv)	1300	coro_enq (pTHX_ SV *coro_sv)
836	{	1301	{
837	int prio;
838
839	if (SvTYPE (sv) != SVt_PVHV)
840	croak ("Coro::ready tried to enqueue something that is not a coroutine");
841
842	prio = SvSTATE (sv)->prio;
843
844	av_push (coro_ready [prio - PRIO_MIN], sv);	1302	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
845	coro_nready++;
846	}	1303	}
847		1304
848	static SV *	1305	static SV *
849	coro_deq (int min_prio)	1306	coro_deq (pTHX_ int min_prio)
850	{	1307	{
851	int prio = PRIO_MAX - PRIO_MIN;	1308	int prio = PRIO_MAX - PRIO_MIN;
852		1309
853	min_prio -= PRIO_MIN;	1310	min_prio -= PRIO_MIN;
854	if (min_prio < 0)	1311	if (min_prio < 0)
855	min_prio = 0;	1312	min_prio = 0;
856		1313
857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1314	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
858	if (AvFILLp (coro_ready [prio]) >= 0)	1315	if (AvFILLp (coro_ready [prio]) >= 0)
859	{
860	coro_nready--;
861	return av_shift (coro_ready [prio]);	1316	return av_shift (coro_ready [prio]);
862	}
863		1317
864	return 0;	1318	return 0;
865	}	1319	}
866		1320
867	static void	1321	static int
868	api_ready (SV *coro)	1322	api_ready (SV *coro_sv)
869	{	1323	{
870	dTHX;	1324	dTHX;
		1325	struct coro *coro;
871		1326
872	if (SvROK (coro))	1327	if (SvROK (coro_sv))
873	coro = SvRV (coro);	1328	coro_sv = SvRV (coro_sv);
		1329
		1330	coro = SvSTATE (coro_sv);
		1331
		1332	if (coro->flags & CF_READY)
		1333	return 0;
		1334
		1335	coro->flags |= CF_READY;
874		1336
875	LOCK;	1337	LOCK;
876	coro_enq (SvREFCNT_inc (coro));	1338	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1339	++coro_nready;
877	UNLOCK;	1340	UNLOCK;
878	}
879		1341
		1342	return 1;
		1343	}
		1344
880	static void	1345	static int
		1346	api_is_ready (SV *coro_sv)
		1347	{
		1348	dTHX;
		1349	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1350	}
		1351
		1352	static void
881	prepare_schedule (struct transfer_args *ta)	1353	prepare_schedule (pTHX_ struct transfer_args *ta)
882	{	1354	{
883	SV *current, *prev, *next;	1355	SV *prev_sv, *next_sv;
884
885	current = GvSV (coro_current);
886		1356
887	for (;;)	1357	for (;;)
888	{	1358	{
889	LOCK;	1359	LOCK;
890	next = coro_deq (PRIO_MIN);	1360	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1361
		1362	/* nothing to schedule: call the idle handler */
		1363	if (expect_false (!next_sv))
		1364	{
		1365	dSP;
		1366	UNLOCK;
		1367
		1368	ENTER;
		1369	SAVETMPS;
		1370
		1371	PUSHMARK (SP);
		1372	PUTBACK;
		1373	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1374
		1375	FREETMPS;
		1376	LEAVE;
		1377	continue;
		1378	}
		1379
		1380	ta->next = SvSTATE (next_sv);
		1381
		1382	/* cannot transfer to destroyed coros, skip and look for next */
		1383	if (expect_false (ta->next->flags & CF_DESTROYED))
		1384	{
		1385	UNLOCK;
		1386	SvREFCNT_dec (next_sv);
		1387	/* coro_nready is already taken care of by destroy */
		1388	continue;
		1389	}
		1390
		1391	--coro_nready;
891	UNLOCK;	1392	UNLOCK;
892
893	if (next)
894	break;	1393	break;
895
896	{
897	dSP;
898
899	ENTER;
900	SAVETMPS;
901
902	PUSHMARK (SP);
903	PUTBACK;
904	call_sv (GvSV (coro_idle), G_DISCARD);
905
906	FREETMPS;
907	LEAVE;
908	}	1394	}
909	}
910
911	prev = SvRV (current);
912	SvRV (current) = next;
913		1395
914	/* free this only after the transfer */	1396	/* free this only after the transfer */
		1397	prev_sv = SvRV (coro_current);
		1398	ta->prev = SvSTATE (prev_sv);
		1399	TRANSFER_CHECK (*ta);
		1400	assert (ta->next->flags & CF_READY);
		1401	ta->next->flags &= ~CF_READY;
		1402	SvRV_set (coro_current, next_sv);
		1403
915	LOCK;	1404	LOCK;
916	free_coro_mortal ();	1405	free_coro_mortal (aTHX);
		1406	coro_mortal = prev_sv;
917	UNLOCK;	1407	UNLOCK;
918	coro_mortal = prev;
919
920	ta->prev = SvSTATE (prev);
921	ta->next = SvSTATE (next);
922	ta->flags = TRANSFER_SAVE_ALL;
923	}	1408	}
924		1409
925	static void	1410	static void
926	prepare_cede (struct transfer_args *ta)	1411	prepare_cede (pTHX_ struct transfer_args *ta)
927	{	1412	{
928	LOCK;	1413	api_ready (coro_current);
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930	UNLOCK;
931
932	prepare_schedule (ta);	1414	prepare_schedule (aTHX_ ta);
		1415	}
		1416
		1417	static int
		1418	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1419	{
		1420	if (coro_nready)
		1421	{
		1422	SV *prev = SvRV (coro_current);
		1423	prepare_schedule (aTHX_ ta);
		1424	api_ready (prev);
		1425	return 1;
		1426	}
		1427	else
		1428	return 0;
933	}	1429	}
934		1430
935	static void	1431	static void
936	api_schedule (void)	1432	api_schedule (void)
937	{	1433	{
938	dTHX;	1434	dTHX;
939	struct transfer_args ta;	1435	struct transfer_args ta;
940		1436
941	prepare_schedule (&ta);	1437	prepare_schedule (aTHX_ &ta);
942	TRANSFER (ta);	1438	TRANSFER (ta);
943	}	1439	}
944		1440
945	static void	1441	static int
946	api_cede (void)	1442	api_cede (void)
947	{	1443	{
948	dTHX;	1444	dTHX;
949	struct transfer_args ta;	1445	struct transfer_args ta;
950		1446
951	prepare_cede (&ta);	1447	prepare_cede (aTHX_ &ta);
		1448
		1449	if (expect_true (ta.prev != ta.next))
		1450	{
952	TRANSFER (ta);	1451	TRANSFER (ta);
		1452	return 1;
		1453	}
		1454	else
		1455	return 0;
953	}	1456	}
954		1457
		1458	static int
		1459	api_cede_notself (void)
		1460	{
		1461	dTHX;
		1462	struct transfer_args ta;
		1463
		1464	if (prepare_cede_notself (aTHX_ &ta))
		1465	{
		1466	TRANSFER (ta);
		1467	return 1;
		1468	}
		1469	else
		1470	return 0;
		1471	}
		1472
		1473	static void
		1474	api_trace (SV *coro_sv, int flags)
		1475	{
		1476	dTHX;
		1477	struct coro *coro = SvSTATE (coro_sv);
		1478
		1479	if (flags & CC_TRACE)
		1480	{
		1481	if (!coro->cctx)
		1482	coro->cctx = cctx_new ();
		1483	else if (!(coro->cctx->flags & CC_TRACE))
		1484	croak ("cannot enable tracing on coroutine with custom stack");
		1485
		1486	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1487	}
		1488	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1489	{
		1490	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1491
		1492	if (coro->flags & CF_RUNNING)
		1493	PL_runops = RUNOPS_DEFAULT;
		1494	else
		1495	coro->slot->runops = RUNOPS_DEFAULT;
		1496	}
		1497	}
		1498
955	MODULE = Coro::State PACKAGE = Coro::State	1499	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956		1500
957	PROTOTYPES: DISABLE	1501	PROTOTYPES: DISABLE
958		1502
959	BOOT:	1503	BOOT:
960	{	1504	{
961	#ifdef USE_ITHREADS	1505	#ifdef USE_ITHREADS
962	MUTEX_INIT (&coro_mutex);	1506	MUTEX_INIT (&coro_mutex);
963	#endif	1507	#endif
964	BOOT_PAGESIZE;	1508	BOOT_PAGESIZE;
965		1509
		1510	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1511	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1512
		1513	hv_sig = coro_get_hv ("SIG", TRUE);
		1514	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1515	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1516
		1517	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1518	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1519
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1520	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1521
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1522	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1523	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1524	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1525	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
971		1526
972	main_mainstack = PL_mainstack;	1527	main_mainstack = PL_mainstack;
		1528	main_top_env = PL_top_env;
		1529
		1530	while (main_top_env->je_prev)
		1531	main_top_env = main_top_env->je_prev;
973		1532
974	coroapi.ver = CORO_API_VERSION;	1533	coroapi.ver = CORO_API_VERSION;
		1534	coroapi.rev = CORO_API_REVISION;
975	coroapi.transfer = api_transfer;	1535	coroapi.transfer = api_transfer;
976		1536
977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1537	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
978	}	1538	}
979		1539
…		…
984	struct coro *coro;	1544	struct coro *coro;
985	HV *hv;	1545	HV *hv;
986	int i;	1546	int i;
987		1547
988	Newz (0, coro, 1, struct coro);	1548	Newz (0, coro, 1, struct coro);
989	coro->args = newAV ();	1549	coro->args = newAV ();
		1550	coro->flags = CF_NEW;
990		1551
		1552	if (coro_first) coro_first->prev = coro;
		1553	coro->next = coro_first;
		1554	coro_first = coro;
		1555
991	hv = newHV ();	1556	coro->hv = hv = newHV ();
992	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1557	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1558	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994		1559
		1560	av_extend (coro->args, items - 1);
995	for (i = 1; i < items; i++)	1561	for (i = 1; i < items; i++)
996	av_push (coro->args, newSVsv (ST (i)));	1562	av_push (coro->args, newSVsv (ST (i)));
997	}	1563	}
998	OUTPUT:	1564	OUTPUT:
999	RETVAL	1565	RETVAL
1000		1566
		1567	# these not obviously related functions are all rolled into the same xs
		1568	# function to increase chances that they all will call transfer with the same
		1569	# stack offset
1001	void	1570	void
1002	_set_stacklevel (...)	1571	_set_stacklevel (...)
1003	ALIAS:	1572	ALIAS:
1004	Coro::State::transfer = 1	1573	Coro::State::transfer = 1
1005	Coro::schedule = 2	1574	Coro::schedule = 2
1006	Coro::cede = 3	1575	Coro::cede = 3
1007	Coro::Cont::yield = 4	1576	Coro::cede_notself = 4
1008	CODE:	1577	CODE:
1009	{	1578	{
1010	struct transfer_args ta;	1579	struct transfer_args ta;
1011		1580
1012	switch (ix)	1581	switch (ix)
1013	{	1582	{
1014	case 0:	1583	case 0:
1015	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1584	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1016	ta.next = 0;	1585	ta.next = 0;
1017	ta.flags = TRANSFER_SET_STACKLEVEL;
1018	break;	1586	break;
1019		1587
1020	case 1:	1588	case 1:
1021	if (items != 3)	1589	if (items != 2)
1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1590	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1023		1591
1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1592	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1025	break;	1593	break;
1026		1594
1027	case 2:	1595	case 2:
1028	prepare_schedule (&ta);	1596	prepare_schedule (aTHX_ &ta);
1029	break;	1597	break;
1030		1598
1031	case 3:	1599	case 3:
1032	prepare_cede (&ta);	1600	prepare_cede (aTHX_ &ta);
1033	break;	1601	break;
1034		1602
1035	case 4:	1603	case 4:
1036	{	1604	if (!prepare_cede_notself (aTHX_ &ta))
1037	SV *yieldstack;	1605	XSRETURN_EMPTY;
1038	SV *sv;
1039	AV *defav = GvAV (PL_defgv);
1040		1606
1041	yieldstack = *hv_fetch (
1042	(HV *)SvRV (GvSV (coro_current)),
1043	"yieldstack", sizeof ("yieldstack") - 1,
1044	0
1045	);
1046
1047	/* set up @_ -- ugly */
1048	av_clear (defav);
1049	av_fill (defav, items - 1);
1050	while (items--)
1051	av_store (defav, items, SvREFCNT_inc (ST(items)));
1052
1053	sv = av_pop ((AV *)SvRV (yieldstack));
1054	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1055	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1056	ta.flags = 0;
1057	SvREFCNT_dec (sv);
1058	}
1059	break;	1607	break;
1060
1061	}	1608	}
1062		1609
		1610	BARRIER;
		1611	PUTBACK;
1063	TRANSFER (ta);	1612	TRANSFER (ta);
		1613	SPAGAIN; /* might be the sp of a different coroutine now */
		1614	/* be extra careful not to ever do anything after TRANSFER */
1064	}	1615	}
1065		1616
1066	void	1617	bool
1067	_clone_state_from (SV *dst, SV *src)	1618	_destroy (SV *coro_sv)
1068	CODE:	1619	CODE:
1069	{	1620	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1070	struct coro *coro_src = SvSTATE (src);	1621	OUTPUT:
1071		1622	RETVAL
1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1073
1074	++coro_src->refcnt;
1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1076	}
1077		1623
1078	void	1624	void
1079	_exit (code)	1625	_exit (code)
1080	int code	1626	int code
1081	PROTOTYPE: $	1627	PROTOTYPE: $
1082	CODE:	1628	CODE:
1083	_exit (code);	1629	_exit (code);
1084		1630
1085	int	1631	int
		1632	cctx_stacksize (int new_stacksize = 0)
		1633	CODE:
		1634	RETVAL = coro_stacksize;
		1635	if (new_stacksize)
		1636	coro_stacksize = new_stacksize;
		1637	OUTPUT:
		1638	RETVAL
		1639
		1640	int
1086	cctx_count ()	1641	cctx_count ()
1087	CODE:	1642	CODE:
1088	RETVAL = cctx_count;	1643	RETVAL = cctx_count;
1089	OUTPUT:	1644	OUTPUT:
1090	RETVAL	1645	RETVAL
…		…
1094	CODE:	1649	CODE:
1095	RETVAL = cctx_idle;	1650	RETVAL = cctx_idle;
1096	OUTPUT:	1651	OUTPUT:
1097	RETVAL	1652	RETVAL
1098		1653
		1654	void
		1655	list ()
		1656	PPCODE:
		1657	{
		1658	struct coro *coro;
		1659	for (coro = coro_first; coro; coro = coro->next)
		1660	if (coro->hv)
		1661	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1662	}
		1663
		1664	void
		1665	call (Coro::State coro, SV *coderef)
		1666	ALIAS:
		1667	eval = 1
		1668	CODE:
		1669	{
		1670	if (coro->mainstack)
		1671	{
		1672	struct coro temp;
		1673
		1674	if (!(coro->flags & CF_RUNNING))
		1675	{
		1676	save_perl (aTHX_ &temp);
		1677	load_perl (aTHX_ coro);
		1678	}
		1679
		1680	{
		1681	dSP;
		1682	ENTER;
		1683	SAVETMPS;
		1684	PUTBACK;
		1685	PUSHSTACK;
		1686	PUSHMARK (SP);
		1687
		1688	if (ix)
		1689	eval_sv (coderef, 0);
		1690	else
		1691	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1692
		1693	POPSTACK;
		1694	SPAGAIN;
		1695	FREETMPS;
		1696	LEAVE;
		1697	PUTBACK;
		1698	}
		1699
		1700	if (!(coro->flags & CF_RUNNING))
		1701	{
		1702	save_perl (aTHX_ coro);
		1703	load_perl (aTHX_ &temp);
		1704	}
		1705	}
		1706	}
		1707
		1708	SV *
		1709	is_ready (Coro::State coro)
		1710	PROTOTYPE: $
		1711	ALIAS:
		1712	is_ready = CF_READY
		1713	is_running = CF_RUNNING
		1714	is_new = CF_NEW
		1715	is_destroyed = CF_DESTROYED
		1716	CODE:
		1717	RETVAL = boolSV (coro->flags & ix);
		1718	OUTPUT:
		1719	RETVAL
		1720
		1721	void
		1722	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1723
		1724	SV *
		1725	has_stack (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = boolSV (!!coro->cctx);
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	int
		1733	is_traced (Coro::State coro)
		1734	PROTOTYPE: $
		1735	CODE:
		1736	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1737	OUTPUT:
		1738	RETVAL
		1739
		1740	IV
		1741	rss (Coro::State coro)
		1742	PROTOTYPE: $
		1743	ALIAS:
		1744	usecount = 1
		1745	CODE:
		1746	switch (ix)
		1747	{
		1748	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1749	case 1: RETVAL = coro->usecount; break;
		1750	}
		1751	OUTPUT:
		1752	RETVAL
		1753
		1754
1099	MODULE = Coro::State PACKAGE = Coro	1755	MODULE = Coro::State PACKAGE = Coro
1100		1756
1101	BOOT:	1757	BOOT:
1102	{	1758	{
1103	int i;	1759	int i;
1104		1760
		1761	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1762	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1763	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1764
		1765	coro_current = coro_get_sv ("Coro::current", FALSE);
		1766	SvREADONLY_on (coro_current);
		1767
1105	coro_stash = gv_stashpv ("Coro", TRUE);	1768	coro_stash = gv_stashpv ("Coro", TRUE);
1106		1769
1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1770	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1771	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1772	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1773	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1774	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1775	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1113		1776
1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1116
1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1777	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1118	coro_ready[i] = newAV ();	1778	coro_ready[i] = newAV ();
1119		1779
1120	{	1780	{
1121	SV *sv = perl_get_sv("Coro::API", 1);	1781	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1782	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1122		1783
1123	coroapi.schedule = api_schedule;	1784	coroapi.schedule = api_schedule;
1124	coroapi.cede = api_cede;	1785	coroapi.cede = api_cede;
		1786	coroapi.cede_notself = api_cede_notself;
1125	coroapi.ready = api_ready;	1787	coroapi.ready = api_ready;
		1788	coroapi.is_ready = api_is_ready;
1126	coroapi.nready = &coro_nready;	1789	coroapi.nready = &coro_nready;
1127	coroapi.current = coro_current;	1790	coroapi.current = coro_current;
1128		1791
1129	GCoroAPI = &coroapi;	1792	GCoroAPI = &coroapi;
1130	sv_setiv (sv, (IV)&coroapi);	1793	sv_setiv (sv, (IV)&coroapi);
1131	SvREADONLY_on (sv);	1794	SvREADONLY_on (sv);
1132	}	1795	}
1133	}	1796	}
		1797
		1798	void
		1799	_set_current (SV *current)
		1800	PROTOTYPE: $
		1801	CODE:
		1802	SvREFCNT_dec (SvRV (coro_current));
		1803	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1134		1804
1135	int	1805	int
1136	prio (Coro::State coro, int newprio = 0)	1806	prio (Coro::State coro, int newprio = 0)
1137	ALIAS:	1807	ALIAS:
1138	nice = 1	1808	nice = 1
…		…
1141	RETVAL = coro->prio;	1811	RETVAL = coro->prio;
1142		1812
1143	if (items > 1)	1813	if (items > 1)
1144	{	1814	{
1145	if (ix)	1815	if (ix)
1146	newprio += coro->prio;	1816	newprio = coro->prio - newprio;
1147		1817
1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1818	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1819	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1150		1820
1151	coro->prio = newprio;	1821	coro->prio = newprio;
1152	}	1822	}
1153	}	1823	}
		1824	OUTPUT:
		1825	RETVAL
1154		1826
1155	void	1827	SV *
1156	ready (SV *self)	1828	ready (SV *self)
1157	PROTOTYPE: $	1829	PROTOTYPE: $
1158	CODE:	1830	CODE:
1159	api_ready (self);	1831	RETVAL = boolSV (api_ready (self));
		1832	OUTPUT:
		1833	RETVAL
1160		1834
1161	int	1835	int
1162	nready (...)	1836	nready (...)
1163	PROTOTYPE:	1837	PROTOTYPE:
1164	CODE:	1838	CODE:
1165	RETVAL = coro_nready;	1839	RETVAL = coro_nready;
1166	OUTPUT:	1840	OUTPUT:
1167	RETVAL	1841	RETVAL
1168		1842
		1843	void
		1844	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1845	PROTOTYPE: $;$
		1846	CODE:
		1847	SvREFCNT_dec (self->throw);
		1848	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1849
		1850	# for async_pool speedup
		1851	void
		1852	_pool_1 (SV *cb)
		1853	CODE:
		1854	{
		1855	struct coro *coro = SvSTATE (coro_current);
		1856	HV *hv = (HV *)SvRV (coro_current);
		1857	AV *defav = GvAV (PL_defgv);
		1858	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1859	AV *invoke_av;
		1860	int i, len;
		1861
		1862	if (!invoke)
		1863	croak ("\3async_pool terminate\2\n");
		1864
		1865	SvREFCNT_dec (coro->saved_deffh);
		1866	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1867
		1868	hv_store (hv, "desc", sizeof ("desc") - 1,
		1869	newSVpvn (strpair ("[async_pool]")), 0);
		1870
		1871	invoke_av = (AV *)SvRV (invoke);
		1872	len = av_len (invoke_av);
		1873
		1874	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1875
		1876	if (len > 0)
		1877	{
		1878	av_fill (defav, len - 1);
		1879	for (i = 0; i < len; ++i)
		1880	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1881	}
		1882
		1883	SvREFCNT_dec (invoke);
		1884	}
		1885
		1886	void
		1887	_pool_2 (SV *cb)
		1888	CODE:
		1889	{
		1890	struct coro *coro = SvSTATE (coro_current);
		1891
		1892	sv_setsv (cb, &PL_sv_undef);
		1893
		1894	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1895	coro->saved_deffh = 0;
		1896
		1897	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1898	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1899	croak ("\3async_pool terminate\2\n");
		1900
		1901	av_clear (GvAV (PL_defgv));
		1902	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1903	newSVpvn (strpair ("[async_pool idle]")), 0);
		1904
		1905	coro->prio = 0;
		1906
		1907	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1908	api_trace (coro_current, 0);
		1909
		1910	av_push (av_async_pool, newSVsv (coro_current));
		1911	}
		1912
		1913
1169	MODULE = Coro::State PACKAGE = Coro::AIO	1914	MODULE = Coro::State PACKAGE = Coro::AIO
1170		1915
1171	SV *	1916	SV *
1172	_get_state ()	1917	_get_state ()
1173	CODE:	1918	CODE:
1174	{	1919	{
1175	struct {	1920	struct io_state *data;
1176	int errorno;
1177	int laststype;
1178	int laststatval;
1179	Stat_t statcache;
1180	} data;
1181		1921
		1922	RETVAL = newSV (sizeof (struct io_state));
		1923	data = (struct io_state *)SvPVX (RETVAL);
		1924	SvCUR_set (RETVAL, sizeof (struct io_state));
		1925	SvPOK_only (RETVAL);
		1926
1182	data.errorno = errno;	1927	data->errorno = errno;
1183	data.laststype = PL_laststype;	1928	data->laststype = PL_laststype;
1184	data.laststatval = PL_laststatval;	1929	data->laststatval = PL_laststatval;
1185	data.statcache = PL_statcache;	1930	data->statcache = PL_statcache;
1186
1187	RETVAL = newSVpvn ((char *)&data, sizeof data);
1188	}	1931	}
1189	OUTPUT:	1932	OUTPUT:
1190	RETVAL	1933	RETVAL
1191		1934
1192	void	1935	void
1193	_set_state (char *data_)	1936	_set_state (char *data_)
1194	PROTOTYPE: $	1937	PROTOTYPE: $
1195	CODE:	1938	CODE:
1196	{	1939	{
1197	struct {	1940	struct io_state *data = (void *)data_;
1198	int errorno;
1199	int laststype;
1200	int laststatval;
1201	Stat_t statcache;
1202	} *data = (void *)data_;
1203		1941
1204	errno = data->errorno;	1942	errno = data->errorno;
1205	PL_laststype = data->laststype;	1943	PL_laststype = data->laststype;
1206	PL_laststatval = data->laststatval;	1944	PL_laststatval = data->laststatval;
1207	PL_statcache = data->statcache;	1945	PL_statcache = data->statcache;
1208	}	1946	}
		1947

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