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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.111 by root, Thu Nov 30 18:21:14 2006 UTC vs.
Revision 1.203 by root, Mon Oct 8 03:02:00 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
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		15
51	#ifdef HAVE_MMAP	16	#ifdef HAVE_MMAP
52	# include <unistd.h>	17	# include <unistd.h>
53	# include <sys/mman.h>	18	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	19	# ifndef MAP_ANONYMOUS
…		…
69	#else	34	#else
70	# define PAGESIZE 0	35	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	36	# define BOOT_PAGESIZE (void)0
72	#endif	37	#endif
73		38
74	/* The next macro should declare a variable stacklevel that contains and approximation	39	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	40	# include <valgrind/valgrind.h>
76	* and should be unique. */	41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	|| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
		56	# ifndef PL_ppaddr
		57	# define PL_ppaddr ppaddr
		58	# endif
		59	# ifndef call_sv
		60	# define call_sv perl_call_sv
		61	# endif
		62	# ifndef get_sv
		63	# define get_sv perl_get_sv
		64	# endif
		65	# ifndef get_cv
		66	# define get_cv perl_get_cv
		67	# endif
		68	# ifndef IS_PADGV
		69	# define IS_PADGV(v) 0
		70	# endif
		71	# ifndef IS_PADCONST
		72	# define IS_PADCONST(v) 0
		73	# endif
		74	#endif
		75
		76	/* 5.8.7 */
		77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
		89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		90	# undef CORO_STACKGUARD
		91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
79		106
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		108
82	#if __GNUC__ >= 3	109	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
84	#else	113	#else
85	# define attribute(x)	114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
86	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
87		121
88	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
89		123
90	#include "CoroAPI.h"	124	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		125
94	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	130	#else
99	# define LOCK (void)0	131	# define LOCK (void)0
100	# define UNLOCK (void)0	132	# define UNLOCK (void)0
101	#endif	133	#endif
102		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
		138	struct io_state
		139	{
		140	int errorno;
		141	I32 laststype;
		142	int laststatval;
		143	Stat_t statcache;
		144	};
		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	148	static AV *main_mainstack; /* used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	150	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	151	static SV *coro_mortal; /* will be freed after next transfer */
107		152
		153	static GV *irsgv; /* $/ */
		154	static GV *stdoutgv; /* *STDOUT */
		155
		156	static HV *hv_sig; /* %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
108	static struct coro_cctx *cctx_first;	165	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		175	};
110		176
111	/* this is a structure representing a c-level coroutine */	177	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	178	typedef struct coro_cctx {
113	struct coro_cctx *next;	179	struct coro_cctx *next;
114		180
115	/* the stack */	181	/* the stack */
116	void *sptr;	182	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	183	size_t ssize;
118		184
119	/* cpu state */	185	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	186	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		187	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	188	JMPENV *top_env;
122	coro_context cctx;	189	coro_context cctx;
123		190
124	int inuse;
125
126	#if USE_VALGRIND	191	#if CORO_USE_VALGRIND
127	int valgrind_id;	192	int valgrind_id;
128	#endif	193	#endif
		194	unsigned char flags;
129	} coro_cctx;	195	} coro_cctx;
130		196
131	enum {	197	enum {
132	CF_RUNNING, /* coroutine is running */	198	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		205	typedef struct {
		206	SV *defsv;
		207	AV *defav;
		208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
		214
		215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
135		216
136	/* this is a structure representing a perl-level coroutine */	217	/* this is a structure representing a perl-level coroutine */
137	struct coro {	218	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	219	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	220	coro_cctx *cctx;
140		221
		222	/* process data */
		223	AV *mainstack;
		224	perl_slots *slot; /* basically the saved sp */
		225
141	/* data associated with this coroutine (initial args) */	226	AV *args; /* data associated with this coroutine (initial args) */
142	AV *args;	227	int refcnt; /* coroutines are refcounted, yes */
143	int refcnt;	228	int flags; /* CF_ flags */
144	int flags;	229	HV *hv; /* the perl hash associated with this coro, if any */
145		230
146	/* optionally saved, might be zero */	231	/* statistics */
147	AV *defav;	232	int usecount; /* number of transfers to this coro */
148	SV *defsv;
149	SV *errsv;
150
151	#define VAR(name,type) type name;
152	# include "state.h"
153	#undef VAR
154		233
155	/* coro process data */	234	/* coro process data */
156	int prio;	235	int prio;
		236	SV *throw; /* exception to be thrown */
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
157	};	243	};
158		244
159	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
161		247
		248	/** Coro ********************************************************************/
		249
		250	#define PRIO_MAX 3
		251	#define PRIO_HIGH 1
		252	#define PRIO_NORMAL 0
		253	#define PRIO_LOW -1
		254	#define PRIO_IDLE -3
		255	#define PRIO_MIN -4
		256
		257	/* for Coro.pm */
		258	static SV *coro_current;
		259	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		260	static int coro_nready;
		261	static struct coro *coro_first;
		262
		263	/** lowlevel stuff **********************************************************/
		264
		265	static SV *
		266	coro_get_sv (const char *name, int create)
		267	{
		268	#if PERL_VERSION_ATLEAST (5,9,0)
		269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		270	get_sv (name, create);
		271	#endif
		272	return get_sv (name, create);
		273	}
		274
162	static AV *	275	static AV *
		276	coro_get_av (const char *name, int create)
		277	{
		278	#if PERL_VERSION_ATLEAST (5,9,0)
		279	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		280	get_av (name, create);
		281	#endif
		282	return get_av (name, create);
		283	}
		284
		285	static HV *
		286	coro_get_hv (const char *name, int create)
		287	{
		288	#if PERL_VERSION_ATLEAST (5,9,0)
		289	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		290	get_hv (name, create);
		291	#endif
		292	return get_hv (name, create);
		293	}
		294
		295	static AV *
163	coro_clone_padlist (CV *cv)	296	coro_clone_padlist (pTHX_ CV *cv)
164	{	297	{
165	AV *padlist = CvPADLIST (cv);	298	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	299	AV *newpadlist, *newpad;
167		300
168	newpadlist = newAV ();	301	newpadlist = newAV ();
…		…
180		313
181	return newpadlist;	314	return newpadlist;
182	}	315	}
183		316
184	static void	317	static void
185	free_padlist (AV *padlist)	318	free_padlist (pTHX_ AV *padlist)
186	{	319	{
187	/* may be during global destruction */	320	/* may be during global destruction */
188	if (SvREFCNT (padlist))	321	if (SvREFCNT (padlist))
189	{	322	{
190	I32 i = AvFILLp (padlist);	323	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	344	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	345	AV *av = (AV *)mg->mg_obj;
213		346
214	/* casting is fun. */	347	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	348	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (padlist);	349	free_padlist (aTHX_ padlist);
217		350
218	SvREFCNT_dec (av);	351	SvREFCNT_dec (av);
219		352
220	return 0;	353	return 0;
221	}	354	}
…		…
229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	362	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230	? SvMAGIC (cv) \	363	? SvMAGIC (cv) \
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	364	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	365	: 0
233		366
		367	static struct coro *
		368	SvSTATE_ (pTHX_ SV *coro)
		369	{
		370	HV *stash;
		371	MAGIC *mg;
		372
		373	if (SvROK (coro))
		374	coro = SvRV (coro);
		375
		376	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		377	croak ("Coro::State object required");
		378
		379	stash = SvSTASH (coro);
		380	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		381	{
		382	/* very slow, but rare, check */
		383	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		384	croak ("Coro::State object required");
		385	}
		386
		387	mg = CORO_MAGIC (coro);
		388	return (struct coro *)mg->mg_ptr;
		389	}
		390
		391	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		392
234	/* the next two functions merely cache the padlists */	393	/* the next two functions merely cache the padlists */
235	static void	394	static void
236	get_padlist (CV *cv)	395	get_padlist (pTHX_ CV *cv)
237	{	396	{
238	MAGIC *mg = CORO_MAGIC (cv);	397	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	398	AV *av;
240		399
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	402	else
244	{	403	{
245	#if 0	404	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	405	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	406	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	407	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	408	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	409	SvREFCNT_dec (cp);
251	#else	410	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	412	#endif
254	}	413	}
255	}	414	}
256		415
257	static void	416	static void
258	put_padlist (CV *cv)	417	put_padlist (pTHX_ CV *cv)
259	{	418	{
260	MAGIC *mg = CORO_MAGIC (cv);	419	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	420	AV *av;
262		421
263	if (!mg)	422	if (expect_false (!mg))
264	{	423	{
265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267	mg->mg_virtual = &vtbl_coro;	426	mg->mg_virtual = &vtbl_coro;
268	mg->mg_obj = (SV *)newAV ();	427	mg->mg_obj = (SV *)newAV ();
269	}	428	}
270		429
271	av = (AV *)mg->mg_obj;	430	av = (AV *)mg->mg_obj;
272		431
273	if (AvFILLp (av) >= AvMAX (av))	432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
274	av_extend (av, AvMAX (av) + 1);	433	av_extend (av, AvMAX (av) + 1);
275		434
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	436	}
278		437
279	#define SB do {	438	/** load & save, init *******************************************************/
280	#define SE } while (0)
281		439
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
286
287	static void	440	static void
288	load_state(Coro__State c)	441	load_perl (pTHX_ Coro__State c)
289	{	442	{
		443	perl_slots *slot = c->slot;
		444	c->slot = 0;
		445
		446	PL_mainstack = c->mainstack;
		447
		448	GvSV (PL_defgv) = slot->defsv;
		449	GvAV (PL_defgv) = slot->defav;
		450	GvSV (PL_errgv) = slot->errsv;
		451	GvSV (irsgv) = slot->irsgv;
		452
290	#define VAR(name,type) PL_ ## name = c->name;	453	#define VAR(name,type) PL_ ## name = slot->name;
291	# include "state.h"	454	# include "state.h"
292	#undef VAR	455	#undef VAR
293		456
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	457	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	458	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
297		459
298	{	460	{
299	dSP;	461	dSP;
		462
300	CV *cv;	463	CV *cv;
301		464
302	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
304	{	467	{
305	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	469	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	470	CvPADLIST (cv) = (AV *)POPs;
308	}	471	}
309		472
310	PUTBACK;	473	PUTBACK;
311	}	474	}
312	}	475	}
313		476
314	static void	477	static void
315	save_state(Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
316	{	479	{
317	{	480	{
318	dSP;	481	dSP;
319	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	486	/*
324	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
326	*/	489	*/
327		490
328	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
330	for (;;)	493	for (;;)
331	{	494	{
332	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
333	{	496	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
335		498
336	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337	{	500	{
338	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
339		502
340	if (CvDEPTH (cv))	503	if (expect_true (CvDEPTH (cv)))
341	{	504	{
342	EXTEND (SP, 3);	505	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
347		509
348	CvDEPTH (cv) = 0;	510	CvDEPTH (cv) = 0;
349	get_padlist (cv);	511	get_padlist (aTHX_ cv);
350	}	512	}
351	}	513	}
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	}	514	}
361		515
362	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
363	break;	517	break;
364		518
365	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
366	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
367	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
368	}	522	}
369		523
370	PUTBACK;	524	PUTBACK;
371	}	525	}
372		526
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
376		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		543
		544	slot->defav = GvAV (PL_defgv);
		545	slot->defsv = DEFSV;
		546	slot->errsv = ERRSV;
		547	slot->irsgv = GvSV (irsgv);
		548
377	#define VAR(name,type)c->name = PL_ ## name;	549	#define VAR(name,type) slot->name = PL_ ## name;
378	# include "state.h"	550	# include "state.h"
379	#undef VAR	551	#undef VAR
		552	}
380	}	553	}
381		554
382	/*	555	/*
383	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
387	*/	560	*/
		561	#if 1
		562	# define coro_init_stacks init_stacks
		563	#else
388	static void	564	static void
389	coro_init_stacks ()	565	coro_init_stacks (pTHX)
390	{	566	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	567	PL_curstackinfo = new_stackinfo(32, 8);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		571
396	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		575
400	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
401	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	579	PL_tmps_max = 32;
404		580
405	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
408		584
409	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
410	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
411	#endif	587	#endif
412		588
413	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
414	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
416		592
417	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
418	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	595	PL_savestack_max = 24;
420		596
421	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
423	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	600	PL_retstack_max = 4;
425	#endif	601	#endif
426	}	602	}
		603	#endif
427		604
428	/*	605	/*
429	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
430	*/	607	*/
431	static void	608	static void
432	coro_destroy_stacks ()	609	coro_destroy_stacks (pTHX)
433	{	610	{
434	if (!IN_DESTRUCT)
435	{
436	/* is this ugly, I ask? */
437	LEAVE_SCOPE (0);
438
439	/* sure it is, but more important: is it correct?? :/ */
440	FREETMPS;
441
442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443	}
444
445	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
447		613
448	while (PL_curstackinfo)	614	while (PL_curstackinfo)
449	{	615	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
451		617
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		620
464	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	623	PL_curstackinfo = p;
467	}	624	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	630	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	631	Safefree (PL_retstack);
475	#endif	632	#endif
476	}	633	}
477		634
478	static void	635	static size_t
479	setup_coro (struct coro *coro)	636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
		674	static void
		675	coro_setup (pTHX_ struct coro *coro)
480	{	676	{
481	/*	677	/*
482	* emulate part of the perl startup here.	678	* emulate part of the perl startup here.
483	*/	679	*/
484
485	coro_init_stacks ();	680	coro_init_stacks (aTHX);
486		681
		682	PL_runops = RUNOPS_DEFAULT;
		683	PL_curcop = &PL_compiling;
		684	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	685	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	686	PL_curpm = 0;
		687	PL_curpad = 0;
		688	PL_localizing = 0;
		689	PL_dirty = 0;
		690	PL_restartop = 0;
		691	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		692	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		693
		694	GvSV (PL_defgv) = newSV (0);
		695	GvAV (PL_defgv) = coro->args; coro->args = 0;
		696	GvSV (PL_errgv) = newSV (0);
		697	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		698	PL_rs = newSVsv (GvSV (irsgv));
		699	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
490		700
491	{	701	{
492	dSP;	702	dSP;
493	LOGOP myop;	703	LOGOP myop;
494		704
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501	Zero (&myop, 1, LOGOP);	705	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	706	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	707	myop.op_flags = OPf_WANT_VOID;
504		708
		709	PUSHMARK (SP);
		710	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		711	PUTBACK;
505	PL_op = (OP *)&myop;	712	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);	713	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	714	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	715	}
515	}
516		716
		717	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		718	}
		719
517	static void	720	static void
		721	coro_destroy (pTHX_ struct coro *coro)
		722	{
		723	if (!IN_DESTRUCT)
		724	{
		725	/* restore all saved variables and stuff */
		726	LEAVE_SCOPE (0);
		727	assert (PL_tmps_floor == -1);
		728
		729	/* free all temporaries */
		730	FREETMPS;
		731	assert (PL_tmps_ix == -1);
		732
		733	/* unwind all extra stacks */
		734	POPSTACK_TO (PL_mainstack);
		735
		736	/* unwind main stack */
		737	dounwind (-1);
		738	}
		739
		740	SvREFCNT_dec (GvSV (PL_defgv));
		741	SvREFCNT_dec (GvAV (PL_defgv));
		742	SvREFCNT_dec (GvSV (PL_errgv));
		743	SvREFCNT_dec (PL_defoutgv);
		744	SvREFCNT_dec (PL_rs);
		745	SvREFCNT_dec (GvSV (irsgv));
		746
		747	SvREFCNT_dec (PL_diehook);
		748	SvREFCNT_dec (PL_warnhook);
		749
		750	SvREFCNT_dec (coro->saved_deffh);
		751	SvREFCNT_dec (coro->throw);
		752
		753	coro_destroy_stacks (aTHX);
		754	}
		755
		756	static void
518	free_coro_mortal ()	757	free_coro_mortal (pTHX)
519	{	758	{
520	if (coro_mortal)	759	if (expect_true (coro_mortal))
521	{	760	{
522	SvREFCNT_dec (coro_mortal);	761	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	762	coro_mortal = 0;
524	}	763	}
525	}	764	}
526		765
		766	static int
		767	runops_trace (pTHX)
		768	{
		769	COP *oldcop = 0;
		770	int oldcxix = -2;
		771	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		772	coro_cctx *cctx = coro->cctx;
		773
		774	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		775	{
		776	PERL_ASYNC_CHECK ();
		777
		778	if (cctx->flags & CC_TRACE_ALL)
		779	{
		780	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		781	{
		782	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		783	SV **bot, **top;
		784	AV *av = newAV (); /* return values */
		785	SV **cb;
		786	dSP;
		787
		788	GV *gv = CvGV (cx->blk_sub.cv);
		789	SV *fullname = sv_2mortal (newSV (0));
		790	if (isGV (gv))
		791	gv_efullname3 (fullname, gv, 0);
		792
		793	bot = PL_stack_base + cx->blk_oldsp + 1;
		794	top = cx->blk_gimme == G_ARRAY ? SP + 1
		795	: cx->blk_gimme == G_SCALAR ? bot + 1
		796	: bot;
		797
		798	av_extend (av, top - bot);
		799	while (bot < top)
		800	av_push (av, SvREFCNT_inc (*bot++));
		801
		802	PL_runops = RUNOPS_DEFAULT;
		803	ENTER;
		804	SAVETMPS;
		805	EXTEND (SP, 3);
		806	PUSHMARK (SP);
		807	PUSHs (&PL_sv_no);
		808	PUSHs (fullname);
		809	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		810	PUTBACK;
		811	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		812	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		813	SPAGAIN;
		814	FREETMPS;
		815	LEAVE;
		816	PL_runops = runops_trace;
		817	}
		818
		819	if (oldcop != PL_curcop)
		820	{
		821	oldcop = PL_curcop;
		822
		823	if (PL_curcop != &PL_compiling)
		824	{
		825	SV **cb;
		826
		827	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		828	{
		829	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		830
		831	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		832	{
		833	runops_proc_t old_runops = PL_runops;
		834	dSP;
		835	GV *gv = CvGV (cx->blk_sub.cv);
		836	SV *fullname = sv_2mortal (newSV (0));
		837
		838	if (isGV (gv))
		839	gv_efullname3 (fullname, gv, 0);
		840
		841	PL_runops = RUNOPS_DEFAULT;
		842	ENTER;
		843	SAVETMPS;
		844	EXTEND (SP, 3);
		845	PUSHMARK (SP);
		846	PUSHs (&PL_sv_yes);
		847	PUSHs (fullname);
		848	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		849	PUTBACK;
		850	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		851	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		852	SPAGAIN;
		853	FREETMPS;
		854	LEAVE;
		855	PL_runops = runops_trace;
		856	}
		857
		858	oldcxix = cxstack_ix;
		859	}
		860
		861	if (cctx->flags & CC_TRACE_LINE)
		862	{
		863	dSP;
		864
		865	PL_runops = RUNOPS_DEFAULT;
		866	ENTER;
		867	SAVETMPS;
		868	EXTEND (SP, 3);
		869	PL_runops = RUNOPS_DEFAULT;
		870	PUSHMARK (SP);
		871	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		872	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		873	PUTBACK;
		874	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		875	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		876	SPAGAIN;
		877	FREETMPS;
		878	LEAVE;
		879	PL_runops = runops_trace;
		880	}
		881	}
		882	}
		883	}
		884	}
		885
		886	TAINT_NOT;
		887	return 0;
		888	}
		889
		890	/* inject a fake call to Coro::State::_cctx_init into the execution */
		891	/* _cctx_init should be careful, as it could be called at almost any time */
		892	/* during execution of a perl program */
527	static void NOINLINE	893	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	894	cctx_prepare (pTHX_ coro_cctx *cctx)
529	{	895	{
530	dSP;	896	dSP;
531	LOGOP myop;	897	LOGOP myop;
532		898
		899	PL_top_env = &PL_start_env;
		900
		901	if (cctx->flags & CC_TRACE)
		902	PL_runops = runops_trace;
		903
533	Zero (&myop, 1, LOGOP);	904	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	905	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	906	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		907
539	PUSHMARK (SP);	908	PUSHMARK (SP);
		909	EXTEND (SP, 2);
		910	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	911	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	912	PUTBACK;
		913	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	914	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	915	SPAGAIN;
544	}	916	}
545		917
		918	/*
		919	* this is a _very_ stripped down perl interpreter ;)
		920	*/
546	static void	921	static void
547	coro_run (void *arg)	922	cctx_run (void *arg)
548	{	923	{
		924	dTHX;
		925
549	/* coro_run is the alternative epilogue of transfer() */	926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	927	UNLOCK;
551		928
		929	/* we now skip the entersub that lead to transfer() */
		930	PL_op = PL_op->op_next;
		931
		932	/* inject a fake subroutine call to cctx_init */
		933	cctx_prepare (aTHX_ (coro_cctx *)arg);
		934
		935	/* somebody or something will hit me for both perl_run and PL_restartop */
		936	PL_restartop = PL_op;
		937	perl_run (PL_curinterp);
		938
552	/*	939	/*
553	* this is a _very_ stripped down perl interpreter ;)	940	* If perl-run returns we assume exit() was being called or the coro
		941	* fell off the end, which seems to be the only valid (non-bug)
		942	* reason for perl_run to return. We try to exit by jumping to the
		943	* bootstrap-time "top" top_env, as we cannot restore the "main"
		944	* coroutine as Coro has no such concept
554	*/	945	*/
555	PL_top_env = &PL_start_env;	946	PL_top_env = main_top_env;
556		947	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	}	948	}
566		949
567	static coro_cctx *	950	static coro_cctx *
568	cctx_new ()	951	cctx_new ()
569	{	952	{
570	coro_cctx *cctx;	953	coro_cctx *cctx;
		954	void *stack_start;
		955	size_t stack_size;
571		956
572	++cctx_count;	957	++cctx_count;
573		958
574	New (0, cctx, 1, coro_cctx);	959	Newz (0, cctx, 1, coro_cctx);
575		960
576	#if HAVE_MMAP	961	#if HAVE_MMAP
577
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	963	/* 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);	964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581		965
582	if (cctx->sptr == (void *)-1)	966	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	967	{
587
588	# if STACKGUARD	968	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags |= CC_MAPPED;
		974	}
		975	else
		976	#endif
		977	{
		978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
591		980
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	981	if (!cctx->sptr)
598	{	982	{
599	perror ("FATAL: unable to malloc stack for coroutine");	983	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	984	_exit (EXIT_FAILURE);
601	}	985	}
602		986
603	#endif	987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
604		990
605	#if USE_VALGRIND	991	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	992	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
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);
613		993
614	return cctx;	994	return cctx;
615	}	995	}
616		996
617	static void	997	static void
618	cctx_free (coro_cctx *cctx)	998	cctx_destroy (coro_cctx *cctx)
619	{	999	{
620	if (!cctx)	1000	if (!cctx)
621	return;	1001	return;
622		1002
623	--cctx_count;	1003	--cctx_count;
624		1004
625	#if USE_VALGRIND	1005	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	1007	#endif
628		1008
629	#if HAVE_MMAP	1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
630	munmap (cctx->sptr, cctx->ssize);	1011	munmap (cctx->sptr, cctx->ssize);
631	#else	1012	else
		1013	#endif
632	Safefree (cctx->sptr);	1014	Safefree (cctx->sptr);
633	#endif
634		1015
635	Safefree (cctx);	1016	Safefree (cctx);
636	}	1017	}
637		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1021
638	static coro_cctx *	1022	static coro_cctx *
639	cctx_get ()	1023	cctx_get (pTHX)
640	{	1024	{
641	coro_cctx *cctx;	1025	while (expect_true (cctx_first))
642
643	if (cctx_first)
644	{	1026	{
		1027	coro_cctx *cctx = cctx_first;
		1028	cctx_first = cctx->next;
645	--cctx_idle;	1029	--cctx_idle;
646	cctx = cctx_first;	1030
647	cctx_first = cctx->next;	1031	if (expect_true (!CCTX_EXPIRED (cctx)))
648	}	1032	return cctx;
649	else	1033
650	{	1034	cctx_destroy (cctx);
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;
653	}	1035	}
654		1036
655	return cctx;	1037	return cctx_new ();
656	}	1038	}
657		1039
658	static void	1040	static void
659	cctx_put (coro_cctx *cctx)	1041	cctx_put (coro_cctx *cctx)
660	{	1042	{
		1043	/* free another cctx if overlimit */
		1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1045	{
		1046	coro_cctx *first = cctx_first;
		1047	cctx_first = first->next;
		1048	--cctx_idle;
		1049
		1050	cctx_destroy (first);
		1051	}
		1052
661	++cctx_idle;	1053	++cctx_idle;
662	cctx->next = cctx_first;	1054	cctx->next = cctx_first;
663	cctx_first = cctx;	1055	cctx_first = cctx;
664	}	1056	}
665		1057
666	/* never call directly, always through the coro_state_transfer global variable */	1058	/** coroutine switching *****************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
		1077	#else
		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
		1079	#endif
		1080	)
		1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1082	}
		1083	}
		1084
		1085	/* always use the TRANSFER macro */
667	static void NOINLINE	1086	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	1087	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	1088	{
670	dSTACKLEVEL;	1089	dSTACKLEVEL;
671		1090
672	/* sometimes transfer is only called to set idle_sp */	1091	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	1092	if (expect_false (!next))
		1093	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1095	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1096	}
675	else if (prev != next)	1097	else if (expect_true (prev != next))
676	{	1098	{
677	coro_cctx *prev__cctx;	1099	coro_cctx *prev__cctx;
678		1100
679	if (!prev->cctx)	1101	if (expect_false (prev->flags & CF_NEW))
680	{	1102	{
681	/* create a new empty context */	1103	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	1104	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	1105	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	1106	prev->flags |= CF_RUNNING;
685	}	1107	}
686
687	assert ( prev->flags & CF_RUNNING);
688	assert (!next->flags & CF_RUNNING);
689		1108
690	prev->flags &= ~CF_RUNNING;	1109	prev->flags &= ~CF_RUNNING;
691	next->flags |= CF_RUNNING;	1110	next->flags |= CF_RUNNING;
692		1111
693	LOCK;	1112	LOCK;
694		1113
695	if (next->mainstack)	1114	if (expect_false (next->flags & CF_NEW))
696	{	1115	{
697	/* coroutine already started */	1116	/* need to start coroutine */
698	SAVE (prev, flags);	1117	next->flags &= ~CF_NEW;
699	LOAD (next);	1118	/* first get rid of the old state */
		1119	save_perl (aTHX_ prev);
		1120	/* setup coroutine call */
		1121	coro_setup (aTHX_ next);
700	}	1122	}
701	else	1123	else
702	{	1124	{
703	/* need to start coroutine */	1125	/* coroutine already started */
704	/* first get rid of the old state */	1126	save_perl (aTHX_ prev);
705	SAVE (prev, -1);	1127	load_perl (aTHX_ next);
706	/* setup coroutine call */
707	setup_coro (next);
708	/* need a stack */
709	assert (!next->stack);
710	next->cctx = 0;
711	}	1128	}
712		1129
713	prev__cctx = prev->cctx;	1130	prev__cctx = prev->cctx;
714		1131
715	/* possibly "free" the cctx */	1132	/* possibly "free" the cctx */
716	if (prev__cctx->idle_sp == STACKLEVEL)	1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
717	{	1134	{
718	assert (PL_top_env == prev__cctx->top_env);//D	1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1137
		1138	prev->cctx = 0;
		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	if (!next->cctx)
		1144	next->cctx = cctx_get (aTHX);
		1145
719	cctx_put (prev__cctx);	1146	cctx_put (prev__cctx);
720	prev->cctx = 0;
721	}	1147	}
722		1148
		1149	++next->usecount;
		1150
723	if (!next->cctx)	1151	if (expect_true (!next->cctx))
724	next->cctx = cctx_get ();	1152	next->cctx = cctx_get (aTHX);
725		1153
726	if (prev__cctx != next->cctx)	1154	if (expect_false (prev__cctx != next->cctx))
727	{	1155	{
728	assert ( prev__cctx->inuse);
729	assert (!next->cctx->inuse);
730
731	prev__cctx->inuse = 0;
732	next->cctx->inuse = 1;
733
734	prev__cctx->top_env = PL_top_env;	1156	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->cctx->top_env;	1157	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1158	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	1159	}
738		1160
739	free_coro_mortal ();	1161	free_coro_mortal (aTHX);
740
741	UNLOCK;	1162	UNLOCK;
		1163
		1164	if (expect_false (prev->throw || next->throw))
		1165	{
		1166	struct coro *coro = SvSTATE (coro_current);
		1167
		1168	if (coro->throw)
		1169	{
		1170	SV *exception = coro->throw;
		1171	coro->throw = 0;
		1172	sv_setsv (ERRSV, exception);
		1173	croak (0);
		1174	}
		1175	}
742	}	1176	}
743	}	1177	}
744		1178
745	struct transfer_args	1179	struct transfer_args
746	{	1180	{
747	struct coro *prev, *next;	1181	struct coro *prev, *next;
748	int flags;
749	};	1182	};
750		1183
751	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1184	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1185	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
752		1186
		1187	/** high level stuff ********************************************************/
		1188
753	static void	1189	static int
754	coro_state_destroy (struct coro *coro)	1190	coro_state_destroy (pTHX_ struct coro *coro)
755	{	1191	{
756	if (coro->refcnt--)	1192	if (coro->flags & CF_DESTROYED)
757	return;	1193	return 0;
		1194
		1195	coro->flags |= CF_DESTROYED;
		1196
		1197	if (coro->flags & CF_READY)
		1198	{
		1199	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1200	/* alternative: look through all ready queues and remove the coro */
		1201	LOCK;
		1202	--coro_nready;
		1203	UNLOCK;
		1204	}
		1205	else
		1206	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
758		1207
759	if (coro->mainstack && coro->mainstack != main_mainstack)	1208	if (coro->mainstack && coro->mainstack != main_mainstack)
760	{	1209	{
761	struct coro temp;	1210	struct coro temp;
762		1211
763	SAVE ((&temp), TRANSFER_SAVE_ALL);	1212	if (coro->flags & CF_RUNNING)
764	LOAD (coro);	1213	croak ("FATAL: tried to destroy currently running coroutine");
765		1214
766	coro_destroy_stacks ();	1215	save_perl (aTHX_ &temp);
		1216	load_perl (aTHX_ coro);
767		1217
768	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1218	coro_destroy (aTHX_ coro);
769		1219
		1220	load_perl (aTHX_ &temp);
		1221
770	coro->mainstack = 0;	1222	coro->slot = 0;
771	}	1223	}
772		1224
773	cctx_free (coro->cctx);	1225	cctx_destroy (coro->cctx);
774	SvREFCNT_dec (coro->args);	1226	SvREFCNT_dec (coro->args);
775	Safefree (coro);	1227
		1228	if (coro->next) coro->next->prev = coro->prev;
		1229	if (coro->prev) coro->prev->next = coro->next;
		1230	if (coro == coro_first) coro_first = coro->next;
		1231
		1232	return 1;
776	}	1233	}
777		1234
778	static int	1235	static int
779	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1236	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
780	{	1237	{
781	struct coro *coro = (struct coro *)mg->mg_ptr;	1238	struct coro *coro = (struct coro *)mg->mg_ptr;
782	mg->mg_ptr = 0;	1239	mg->mg_ptr = 0;
783		1240
		1241	coro->hv = 0;
		1242
		1243	if (--coro->refcnt < 0)
		1244	{
784	coro_state_destroy (coro);	1245	coro_state_destroy (aTHX_ coro);
		1246	Safefree (coro);
		1247	}
785		1248
786	return 0;	1249	return 0;
787	}	1250	}
788		1251
789	static int	1252	static int
…		…
796	return 0;	1259	return 0;
797	}	1260	}
798		1261
799	static MGVTBL coro_state_vtbl = {	1262	static MGVTBL coro_state_vtbl = {
800	0, 0, 0, 0,	1263	0, 0, 0, 0,
801	coro_state_clear,	1264	coro_state_free,
802	0,	1265	0,
803	#ifdef MGf_DUP	1266	#ifdef MGf_DUP
804	coro_state_dup,	1267	coro_state_dup,
805	#else	1268	#else
806	# define MGf_DUP 0	1269	# define MGf_DUP 0
807	#endif	1270	#endif
808	};	1271	};
809		1272
810	static struct coro *
811	SvSTATE (SV *coro)
812	{
813	HV *stash;
814	MAGIC *mg;
815
816	if (SvROK (coro))
817	coro = SvRV (coro);
818
819	stash = SvSTASH (coro);
820	if (stash != coro_stash && stash != coro_state_stash)
821	{
822	/* very slow, but rare, check */
823	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
824	croak ("Coro::State object required");
825	}
826
827	mg = SvMAGIC (coro);
828	assert (mg->mg_type == PERL_MAGIC_ext);
829	return (struct coro *)mg->mg_ptr;
830	}
831
832	static void	1273	static void
833	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1274	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
834	{	1275	{
835	ta->prev = SvSTATE (prev);	1276	ta->prev = SvSTATE (prev_sv);
836	ta->next = SvSTATE (next);	1277	ta->next = SvSTATE (next_sv);
837	ta->flags = flags;	1278	TRANSFER_CHECK (*ta);
838	}	1279	}
839		1280
840	static void	1281	static void
841	api_transfer (SV *prev, SV *next, int flags)	1282	api_transfer (SV *prev_sv, SV *next_sv)
842	{	1283	{
843	dTHX;	1284	dTHX;
844	struct transfer_args ta;	1285	struct transfer_args ta;
845		1286
846	prepare_transfer (&ta, prev, next, flags);	1287	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
847	TRANSFER (ta);	1288	TRANSFER (ta);
848	}	1289	}
849		1290
850	/** Coro ********************************************************************/	1291	/** Coro ********************************************************************/
851		1292
852	#define PRIO_MAX 3
853	#define PRIO_HIGH 1
854	#define PRIO_NORMAL 0
855	#define PRIO_LOW -1
856	#define PRIO_IDLE -3
857	#define PRIO_MIN -4
858
859	/* for Coro.pm */
860	static GV *coro_current, *coro_idle;
861	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
862	static int coro_nready;
863
864	static void	1293	static void
865	coro_enq (SV *sv)	1294	coro_enq (pTHX_ SV *coro_sv)
866	{	1295	{
867	int prio;
868
869	if (SvTYPE (sv) != SVt_PVHV)
870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
871
872	prio = SvSTATE (sv)->prio;
873
874	av_push (coro_ready [prio - PRIO_MIN], sv);	1296	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875	coro_nready++;
876	}	1297	}
877		1298
878	static SV *	1299	static SV *
879	coro_deq (int min_prio)	1300	coro_deq (pTHX_ int min_prio)
880	{	1301	{
881	int prio = PRIO_MAX - PRIO_MIN;	1302	int prio = PRIO_MAX - PRIO_MIN;
882		1303
883	min_prio -= PRIO_MIN;	1304	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1305	if (min_prio < 0)
885	min_prio = 0;	1306	min_prio = 0;
886		1307
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1308	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (AvFILLp (coro_ready [prio]) >= 0)	1309	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready [prio]);	1310	return av_shift (coro_ready [prio]);
892	}
893		1311
894	return 0;	1312	return 0;
895	}	1313	}
896		1314
897	static int	1315	static int
898	api_ready (SV *coro_sv)	1316	api_ready (SV *coro_sv)
899	{	1317	{
		1318	dTHX;
900	struct coro *coro;	1319	struct coro *coro;
901		1320
902	if (SvROK (coro_sv))	1321	if (SvROK (coro_sv))
903	coro_sv = SvRV (coro_sv);	1322	coro_sv = SvRV (coro_sv);
904		1323
905	coro = SvSTATE (coro_sv);	1324	coro = SvSTATE (coro_sv);
		1325
906	if (coro->flags & CF_READY)	1326	if (coro->flags & CF_READY)
907	return 0;	1327	return 0;
908		1328
909	coro->flags |= CF_READY;	1329	coro->flags |= CF_READY;
910		1330
911	LOCK;	1331	LOCK;
912	coro_enq (SvREFCNT_inc (coro_sv));	1332	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1333	++coro_nready;
913	UNLOCK;	1334	UNLOCK;
914		1335
915	return 1;	1336	return 1;
916	}	1337	}
917		1338
918	static int	1339	static int
919	api_is_ready (SV *coro_sv)	1340	api_is_ready (SV *coro_sv)
920	{	1341	{
921	struct coro *coro;	1342	dTHX;
922
923	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1343	return !!(SvSTATE (coro_sv)->flags & CF_READY);
924	}	1344	}
925		1345
926	static void	1346	static void
927	prepare_schedule (struct transfer_args *ta)	1347	prepare_schedule (pTHX_ struct transfer_args *ta)
928	{	1348	{
929	SV *current, *prev, *next;	1349	SV *prev_sv, *next_sv;
930
931	current = GvSV (coro_current);
932		1350
933	for (;;)	1351	for (;;)
934	{	1352	{
935	LOCK;	1353	LOCK;
936	next = coro_deq (PRIO_MIN);	1354	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1355
		1356	/* nothing to schedule: call the idle handler */
		1357	if (expect_false (!next_sv))
		1358	{
		1359	dSP;
		1360	UNLOCK;
		1361
		1362	ENTER;
		1363	SAVETMPS;
		1364
		1365	PUSHMARK (SP);
		1366	PUTBACK;
		1367	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1368
		1369	FREETMPS;
		1370	LEAVE;
		1371	continue;
		1372	}
		1373
		1374	ta->next = SvSTATE (next_sv);
		1375
		1376	/* cannot transfer to destroyed coros, skip and look for next */
		1377	if (expect_false (ta->next->flags & CF_DESTROYED))
		1378	{
		1379	UNLOCK;
		1380	SvREFCNT_dec (next_sv);
		1381	/* coro_nready is already taken care of by destroy */
		1382	continue;
		1383	}
		1384
		1385	--coro_nready;
937	UNLOCK;	1386	UNLOCK;
938
939	if (next)
940	break;	1387	break;
941
942	{
943	dSP;
944
945	ENTER;
946	SAVETMPS;
947
948	PUSHMARK (SP);
949	PUTBACK;
950	call_sv (GvSV (coro_idle), G_DISCARD);
951
952	FREETMPS;
953	LEAVE;
954	}	1388	}
955	}
956
957	prev = SvRV (current);
958	SvRV (current) = next;
959		1389
960	/* free this only after the transfer */	1390	/* free this only after the transfer */
		1391	prev_sv = SvRV (coro_current);
		1392	ta->prev = SvSTATE (prev_sv);
		1393	TRANSFER_CHECK (*ta);
		1394	assert (ta->next->flags & CF_READY);
		1395	ta->next->flags &= ~CF_READY;
		1396	SvRV_set (coro_current, next_sv);
		1397
961	LOCK;	1398	LOCK;
962	free_coro_mortal ();	1399	free_coro_mortal (aTHX);
		1400	coro_mortal = prev_sv;
963	UNLOCK;	1401	UNLOCK;
964	coro_mortal = prev;
965
966	ta->prev = SvSTATE (prev);
967	ta->next = SvSTATE (next);
968	ta->flags = TRANSFER_SAVE_ALL;
969
970	ta->next->flags &= ~CF_READY;
971	}	1402	}
972		1403
973	static void	1404	static void
974	prepare_cede (struct transfer_args *ta)	1405	prepare_cede (pTHX_ struct transfer_args *ta)
975	{	1406	{
976	api_ready (GvSV (coro_current));	1407	api_ready (coro_current);
977
978	prepare_schedule (ta);	1408	prepare_schedule (aTHX_ ta);
		1409	}
		1410
		1411	static int
		1412	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1413	{
		1414	if (coro_nready)
		1415	{
		1416	SV *prev = SvRV (coro_current);
		1417	prepare_schedule (aTHX_ ta);
		1418	api_ready (prev);
		1419	return 1;
		1420	}
		1421	else
		1422	return 0;
979	}	1423	}
980		1424
981	static void	1425	static void
982	api_schedule (void)	1426	api_schedule (void)
983	{	1427	{
984	dTHX;	1428	dTHX;
985	struct transfer_args ta;	1429	struct transfer_args ta;
986		1430
987	prepare_schedule (&ta);	1431	prepare_schedule (aTHX_ &ta);
988	TRANSFER (ta);	1432	TRANSFER (ta);
989	}	1433	}
990		1434
991	static void	1435	static int
992	api_cede (void)	1436	api_cede (void)
993	{	1437	{
994	dTHX;	1438	dTHX;
995	struct transfer_args ta;	1439	struct transfer_args ta;
996		1440
997	prepare_cede (&ta);	1441	prepare_cede (aTHX_ &ta);
		1442
		1443	if (expect_true (ta.prev != ta.next))
		1444	{
998	TRANSFER (ta);	1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
999	}	1450	}
1000		1451
		1452	static int
		1453	api_cede_notself (void)
		1454	{
		1455	dTHX;
		1456	struct transfer_args ta;
		1457
		1458	if (prepare_cede_notself (aTHX_ &ta))
		1459	{
		1460	TRANSFER (ta);
		1461	return 1;
		1462	}
		1463	else
		1464	return 0;
		1465	}
		1466
		1467	static void
		1468	api_trace (SV *coro_sv, int flags)
		1469	{
		1470	dTHX;
		1471	struct coro *coro = SvSTATE (coro_sv);
		1472
		1473	if (flags & CC_TRACE)
		1474	{
		1475	if (!coro->cctx)
		1476	coro->cctx = cctx_new ();
		1477	else if (!(coro->cctx->flags & CC_TRACE))
		1478	croak ("cannot enable tracing on coroutine with custom stack");
		1479
		1480	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1481	}
		1482	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1483	{
		1484	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1485
		1486	if (coro->flags & CF_RUNNING)
		1487	PL_runops = RUNOPS_DEFAULT;
		1488	else
		1489	coro->slot->runops = RUNOPS_DEFAULT;
		1490	}
		1491	}
		1492
1001	MODULE = Coro::State PACKAGE = Coro::State	1493	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1002		1494
1003	PROTOTYPES: DISABLE	1495	PROTOTYPES: DISABLE
1004		1496
1005	BOOT:	1497	BOOT:
1006	{	1498	{
1007	#ifdef USE_ITHREADS	1499	#ifdef USE_ITHREADS
1008	MUTEX_INIT (&coro_mutex);	1500	MUTEX_INIT (&coro_mutex);
1009	#endif	1501	#endif
1010	BOOT_PAGESIZE;	1502	BOOT_PAGESIZE;
1011		1503
		1504	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1505	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1506
		1507	hv_sig = coro_get_hv ("SIG", TRUE);
		1508	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1509	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1510
		1511	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1512	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1513
1012	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1514	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1013		1515
1014	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1015	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1016	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1519	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1017		1520
1018	main_mainstack = PL_mainstack;	1521	main_mainstack = PL_mainstack;
		1522	main_top_env = PL_top_env;
		1523
		1524	while (main_top_env->je_prev)
		1525	main_top_env = main_top_env->je_prev;
1019		1526
1020	coroapi.ver = CORO_API_VERSION;	1527	coroapi.ver = CORO_API_VERSION;
1021	coroapi.transfer = api_transfer;	1528	coroapi.transfer = api_transfer;
1022		1529
1023	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1530	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1030	struct coro *coro;	1537	struct coro *coro;
1031	HV *hv;	1538	HV *hv;
1032	int i;	1539	int i;
1033		1540
1034	Newz (0, coro, 1, struct coro);	1541	Newz (0, coro, 1, struct coro);
1035	coro->args = newAV ();	1542	coro->args = newAV ();
		1543	coro->flags = CF_NEW;
1036		1544
		1545	if (coro_first) coro_first->prev = coro;
		1546	coro->next = coro_first;
		1547	coro_first = coro;
		1548
1037	hv = newHV ();	1549	coro->hv = hv = newHV ();
1038	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1550	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1039	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1551	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1040		1552
		1553	av_extend (coro->args, items - 1);
1041	for (i = 1; i < items; i++)	1554	for (i = 1; i < items; i++)
1042	av_push (coro->args, newSVsv (ST (i)));	1555	av_push (coro->args, newSVsv (ST (i)));
1043	}	1556	}
1044	OUTPUT:	1557	OUTPUT:
1045	RETVAL	1558	RETVAL
1046		1559
		1560	# these not obviously related functions are all rolled into the same xs
		1561	# function to increase chances that they all will call transfer with the same
		1562	# stack offset
1047	void	1563	void
1048	_set_stacklevel (...)	1564	_set_stacklevel (...)
1049	ALIAS:	1565	ALIAS:
1050	Coro::State::transfer = 1	1566	Coro::State::transfer = 1
1051	Coro::schedule = 2	1567	Coro::schedule = 2
1052	Coro::cede = 3	1568	Coro::cede = 3
1053	Coro::Cont::yield = 4	1569	Coro::cede_notself = 4
1054	CODE:	1570	CODE:
1055	{	1571	{
1056	struct transfer_args ta;	1572	struct transfer_args ta;
1057		1573
1058	switch (ix)	1574	switch (ix)
1059	{	1575	{
1060	case 0:	1576	case 0:
1061	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1577	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1062	ta.next = 0;	1578	ta.next = 0;
1063	ta.flags = TRANSFER_SET_STACKLEVEL;
1064	break;	1579	break;
1065		1580
1066	case 1:	1581	case 1:
1067	if (items != 3)	1582	if (items != 2)
1068	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1583	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1069		1584
1070	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1585	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1071	break;	1586	break;
1072		1587
1073	case 2:	1588	case 2:
1074	prepare_schedule (&ta);	1589	prepare_schedule (aTHX_ &ta);
1075	break;	1590	break;
1076		1591
1077	case 3:	1592	case 3:
1078	prepare_cede (&ta);	1593	prepare_cede (aTHX_ &ta);
1079	break;	1594	break;
1080		1595
1081	case 4:	1596	case 4:
1082	{	1597	if (!prepare_cede_notself (aTHX_ &ta))
1083	SV *yieldstack;	1598	XSRETURN_EMPTY;
1084	SV *sv;
1085	AV *defav = GvAV (PL_defgv);
1086		1599
1087	yieldstack = *hv_fetch (
1088	(HV *)SvRV (GvSV (coro_current)),
1089	"yieldstack", sizeof ("yieldstack") - 1,
1090	0
1091	);
1092
1093	/* set up @_ -- ugly */
1094	av_clear (defav);
1095	av_fill (defav, items - 1);
1096	while (items--)
1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099	sv = av_pop ((AV *)SvRV (yieldstack));
1100	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102	ta.flags = 0;
1103	SvREFCNT_dec (sv);
1104	}
1105	break;	1600	break;
1106
1107	}	1601	}
1108		1602
		1603	BARRIER;
1109	TRANSFER (ta);	1604	TRANSFER (ta);
1110	}
1111		1605
1112	void	1606	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1113	_clone_state_from (SV *dst, SV *src)	1607	XSRETURN_YES;
		1608	}
		1609
		1610	bool
		1611	_destroy (SV *coro_sv)
1114	CODE:	1612	CODE:
1115	{	1613	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1116	struct coro *coro_src = SvSTATE (src);	1614	OUTPUT:
1117		1615	RETVAL
1118	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1119
1120	++coro_src->refcnt;
1121	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1122	}
1123		1616
1124	void	1617	void
1125	_exit (code)	1618	_exit (code)
1126	int code	1619	int code
1127	PROTOTYPE: $	1620	PROTOTYPE: $
1128	CODE:	1621	CODE:
1129	_exit (code);	1622	_exit (code);
1130		1623
1131	int	1624	int
		1625	cctx_stacksize (int new_stacksize = 0)
		1626	CODE:
		1627	RETVAL = coro_stacksize;
		1628	if (new_stacksize)
		1629	coro_stacksize = new_stacksize;
		1630	OUTPUT:
		1631	RETVAL
		1632
		1633	int
1132	cctx_count ()	1634	cctx_count ()
1133	CODE:	1635	CODE:
1134	RETVAL = cctx_count;	1636	RETVAL = cctx_count;
1135	OUTPUT:	1637	OUTPUT:
1136	RETVAL	1638	RETVAL
…		…
1140	CODE:	1642	CODE:
1141	RETVAL = cctx_idle;	1643	RETVAL = cctx_idle;
1142	OUTPUT:	1644	OUTPUT:
1143	RETVAL	1645	RETVAL
1144		1646
		1647	void
		1648	list ()
		1649	PPCODE:
		1650	{
		1651	struct coro *coro;
		1652	for (coro = coro_first; coro; coro = coro->next)
		1653	if (coro->hv)
		1654	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1655	}
		1656
		1657	void
		1658	call (Coro::State coro, SV *coderef)
		1659	ALIAS:
		1660	eval = 1
		1661	CODE:
		1662	{
		1663	if (coro->mainstack)
		1664	{
		1665	struct coro temp;
		1666
		1667	if (!(coro->flags & CF_RUNNING))
		1668	{
		1669	save_perl (aTHX_ &temp);
		1670	load_perl (aTHX_ coro);
		1671	}
		1672
		1673	{
		1674	dSP;
		1675	ENTER;
		1676	SAVETMPS;
		1677	PUSHMARK (SP);
		1678	PUTBACK;
		1679
		1680	if (ix)
		1681	eval_sv (coderef, 0);
		1682	else
		1683	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1684
		1685	SPAGAIN;
		1686	FREETMPS;
		1687	LEAVE;
		1688	PUTBACK;
		1689	}
		1690
		1691	if (!(coro->flags & CF_RUNNING))
		1692	{
		1693	save_perl (aTHX_ coro);
		1694	load_perl (aTHX_ &temp);
		1695	}
		1696	}
		1697	}
		1698
		1699	SV *
		1700	is_ready (Coro::State coro)
		1701	PROTOTYPE: $
		1702	ALIAS:
		1703	is_ready = CF_READY
		1704	is_running = CF_RUNNING
		1705	is_new = CF_NEW
		1706	is_destroyed = CF_DESTROYED
		1707	CODE:
		1708	RETVAL = boolSV (coro->flags & ix);
		1709	OUTPUT:
		1710	RETVAL
		1711
		1712	void
		1713	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1714
		1715	SV *
		1716	has_stack (Coro::State coro)
		1717	PROTOTYPE: $
		1718	CODE:
		1719	RETVAL = boolSV (!!coro->cctx);
		1720	OUTPUT:
		1721	RETVAL
		1722
		1723	int
		1724	is_traced (Coro::State coro)
		1725	PROTOTYPE: $
		1726	CODE:
		1727	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	IV
		1732	rss (Coro::State coro)
		1733	PROTOTYPE: $
		1734	ALIAS:
		1735	usecount = 1
		1736	CODE:
		1737	switch (ix)
		1738	{
		1739	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1740	case 1: RETVAL = coro->usecount; break;
		1741	}
		1742	OUTPUT:
		1743	RETVAL
		1744
		1745
1145	MODULE = Coro::State PACKAGE = Coro	1746	MODULE = Coro::State PACKAGE = Coro
1146		1747
1147	BOOT:	1748	BOOT:
1148	{	1749	{
1149	int i;	1750	int i;
1150		1751
		1752	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1753	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1754	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1755
		1756	coro_current = coro_get_sv ("Coro::current", FALSE);
		1757	SvREADONLY_on (coro_current);
		1758
1151	coro_stash = gv_stashpv ("Coro", TRUE);	1759	coro_stash = gv_stashpv ("Coro", TRUE);
1152		1760
1153	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1761	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1154	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1762	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1155	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1763	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1156	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1764	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1157	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1765	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1158	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1766	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1159		1767
1160	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1161	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1162
1163	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1768	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1164	coro_ready[i] = newAV ();	1769	coro_ready[i] = newAV ();
1165		1770
1166	{	1771	{
1167	SV *sv = perl_get_sv("Coro::API", 1);	1772	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1773	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1168		1774
1169	coroapi.schedule = api_schedule;	1775	coroapi.schedule = api_schedule;
1170	coroapi.cede = api_cede;	1776	coroapi.cede = api_cede;
		1777	coroapi.cede_notself = api_cede_notself;
1171	coroapi.ready = api_ready;	1778	coroapi.ready = api_ready;
1172	coroapi.is_ready = api_is_ready;	1779	coroapi.is_ready = api_is_ready;
1173	coroapi.nready = &coro_nready;	1780	coroapi.nready = &coro_nready;
1174	coroapi.current = coro_current;	1781	coroapi.current = coro_current;
1175		1782
1176	GCoroAPI = &coroapi;	1783	GCoroAPI = &coroapi;
1177	sv_setiv (sv, (IV)&coroapi);	1784	sv_setiv (sv, (IV)&coroapi);
1178	SvREADONLY_on (sv);	1785	SvREADONLY_on (sv);
1179	}	1786	}
1180	}	1787	}
		1788
		1789	void
		1790	_set_current (SV *current)
		1791	PROTOTYPE: $
		1792	CODE:
		1793	SvREFCNT_dec (SvRV (coro_current));
		1794	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1181		1795
1182	int	1796	int
1183	prio (Coro::State coro, int newprio = 0)	1797	prio (Coro::State coro, int newprio = 0)
1184	ALIAS:	1798	ALIAS:
1185	nice = 1	1799	nice = 1
…		…
1188	RETVAL = coro->prio;	1802	RETVAL = coro->prio;
1189		1803
1190	if (items > 1)	1804	if (items > 1)
1191	{	1805	{
1192	if (ix)	1806	if (ix)
1193	newprio += coro->prio;	1807	newprio = coro->prio - newprio;
1194		1808
1195	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1809	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1196	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1810	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1197		1811
1198	coro->prio = newprio;	1812	coro->prio = newprio;
1199	}	1813	}
1200	}	1814	}
		1815	OUTPUT:
		1816	RETVAL
1201		1817
1202	SV *	1818	SV *
1203	ready (SV *self)	1819	ready (SV *self)
1204	PROTOTYPE: $	1820	PROTOTYPE: $
1205	CODE:	1821	CODE:
1206	RETVAL = boolSV (api_ready (self));	1822	RETVAL = boolSV (api_ready (self));
1207	OUTPUT:	1823	OUTPUT:
1208	RETVAL	1824	RETVAL
1209		1825
1210	SV *
1211	is_ready (SV *self)
1212	PROTOTYPE: $
1213	CODE:
1214	RETVAL = boolSV (api_is_ready (self));
1215	OUTPUT:
1216	RETVAL
1217
1218	int	1826	int
1219	nready (...)	1827	nready (...)
1220	PROTOTYPE:	1828	PROTOTYPE:
1221	CODE:	1829	CODE:
1222	RETVAL = coro_nready;	1830	RETVAL = coro_nready;
1223	OUTPUT:	1831	OUTPUT:
1224	RETVAL	1832	RETVAL
1225		1833
		1834	void
		1835	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1836	PROTOTYPE: $;$
		1837	CODE:
		1838	SvREFCNT_dec (self->throw);
		1839	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1840
		1841	# for async_pool speedup
		1842	void
		1843	_pool_1 (SV *cb)
		1844	CODE:
		1845	{
		1846	struct coro *coro = SvSTATE (coro_current);
		1847	HV *hv = (HV *)SvRV (coro_current);
		1848	AV *defav = GvAV (PL_defgv);
		1849	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1850	AV *invoke_av;
		1851	int i, len;
		1852
		1853	if (!invoke)
		1854	croak ("\3async_pool terminate\2\n");
		1855
		1856	SvREFCNT_dec (coro->saved_deffh);
		1857	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1858
		1859	hv_store (hv, "desc", sizeof ("desc") - 1,
		1860	newSVpvn (strpair ("[async_pool]")), 0);
		1861
		1862	invoke_av = (AV *)SvRV (invoke);
		1863	len = av_len (invoke_av);
		1864
		1865	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1866
		1867	if (len > 0)
		1868	{
		1869	av_fill (defav, len - 1);
		1870	for (i = 0; i < len; ++i)
		1871	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1872	}
		1873
		1874	SvREFCNT_dec (invoke);
		1875	}
		1876
		1877	void
		1878	_pool_2 (SV *cb)
		1879	CODE:
		1880	{
		1881	struct coro *coro = SvSTATE (coro_current);
		1882
		1883	sv_setsv (cb, &PL_sv_undef);
		1884
		1885	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1886	coro->saved_deffh = 0;
		1887
		1888	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1889	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1890	croak ("\3async_pool terminate\2\n");
		1891
		1892	av_clear (GvAV (PL_defgv));
		1893	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1894	newSVpvn (strpair ("[async_pool idle]")), 0);
		1895
		1896	coro->prio = 0;
		1897
		1898	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1899	api_trace (coro_current, 0);
		1900
		1901	av_push (av_async_pool, newSVsv (coro_current));
		1902	}
		1903
		1904
1226	MODULE = Coro::State PACKAGE = Coro::AIO	1905	MODULE = Coro::State PACKAGE = Coro::AIO
1227		1906
1228	SV *	1907	SV *
1229	_get_state ()	1908	_get_state ()
1230	CODE:	1909	CODE:
1231	{	1910	{
1232	struct {	1911	struct io_state *data;
1233	int errorno;
1234	int laststype;
1235	int laststatval;
1236	Stat_t statcache;
1237	} data;
1238		1912
		1913	RETVAL = newSV (sizeof (struct io_state));
		1914	data = (struct io_state *)SvPVX (RETVAL);
		1915	SvCUR_set (RETVAL, sizeof (struct io_state));
		1916	SvPOK_only (RETVAL);
		1917
1239	data.errorno = errno;	1918	data->errorno = errno;
1240	data.laststype = PL_laststype;	1919	data->laststype = PL_laststype;
1241	data.laststatval = PL_laststatval;	1920	data->laststatval = PL_laststatval;
1242	data.statcache = PL_statcache;	1921	data->statcache = PL_statcache;
1243
1244	RETVAL = newSVpvn ((char *)&data, sizeof data);
1245	}	1922	}
1246	OUTPUT:	1923	OUTPUT:
1247	RETVAL	1924	RETVAL
1248		1925
1249	void	1926	void
1250	_set_state (char *data_)	1927	_set_state (char *data_)
1251	PROTOTYPE: $	1928	PROTOTYPE: $
1252	CODE:	1929	CODE:
1253	{	1930	{
1254	struct {	1931	struct io_state *data = (void *)data_;
1255	int errorno;
1256	int laststype;
1257	int laststatval;
1258	Stat_t statcache;
1259	} *data = (void *)data_;
1260		1932
1261	errno = data->errorno;	1933	errno = data->errorno;
1262	PL_laststype = data->laststype;	1934	PL_laststype = data->laststype;
1263	PL_laststatval = data->laststatval;	1935	PL_laststatval = data->laststatval;
1264	PL_statcache = data->statcache;	1936	PL_statcache = data->statcache;
1265	}	1937	}
		1938

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