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Comparing Coro/Coro/State.xs (file contents):
Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC vs.
Revision 1.175 by root, Sun Sep 30 13:43:45 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#if PATCHLEVEL < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
10	# endif	57	# endif
11	# ifndef call_sv	58	# ifndef call_sv
12	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
25	# endif	72	# endif
26	#endif	73	#endif
27		74
28	#include "libcoro/coro.c"	75	/* 5.8.7 */
29		76	#ifndef SvRV_set
30	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	78	#endif
42	#endif
43		79
44	#define MAY_FLUSH /* increases codesize and is rarely used */	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
45		83
46	#define SUB_INIT "Coro::State::initialize"	84	#ifndef CORO_STACKGUARD
47	#define UCORO_STATE "_coro_state"	85	# define CORO_STACKGUARD 0
		86	#endif
48		87
49	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
50	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
51	* and should be unique. */	90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
		95	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
53		97
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		99
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
57		109
58	#include "CoroAPI.h"	110	#include "CoroAPI.h"
59		111
		112	#ifdef USE_ITHREADS
		113	static perl_mutex coro_mutex;
		114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		116	#else
		117	# define LOCK (void)0
		118	# define UNLOCK (void)0
		119	#endif
		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
60	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
		132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
		134	static HV *coro_state_stash, *coro_stash;
		135	static SV *coro_mortal; /* will be freed after next transfer */
61		136
62	/* this is actually not only the c stack but also c registers etc... */	137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
		153
		154	/* this is a structure representing a c-level coroutine */
63	typedef struct {	155	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	156	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		157
		158	/* the stack */
		159	void *sptr;
		160	size_t ssize;
		161
		162	/* cpu state */
		163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		165	JMPENV *top_env;
68	coro_context cctx;	166	coro_context cctx;
69		167
70	void *sptr;	168	#if CORO_USE_VALGRIND
71	long ssize; /* positive == mmap, otherwise malloc */	169	int valgrind_id;
72	} coro_stack;	170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
73		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
		180
		181	/* this is a structure representing a perl-level coroutine */
74	struct coro {	182	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	183	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	184	coro_cctx *cctx;
77
78	/* the optional C context */
79	coro_stack *stack;
80	void *cursp;
81	int gencnt;
82
83	/* optionally saved, might be zero */
84	AV *defav;
85	SV *defsv;
86	SV *errsv;
87
88	/* saved global state not related to stacks */
89	U8 dowarn;
90	I32 in_eval;
91
92	/* the stacks and related info (callchain etc..) */
93	PERL_SI *curstackinfo;
94	AV *curstack;
95	AV *mainstack;
96	SV **stack_sp;
97	OP *op;
98	SV **curpad;
99	AV *comppad;
100	SV **stack_base;
101	SV **stack_max;
102	SV **tmps_stack;
103	I32 tmps_floor;
104	I32 tmps_ix;
105	I32 tmps_max;
106	I32 *markstack;
107	I32 *markstack_ptr;
108	I32 *markstack_max;
109	I32 *scopestack;
110	I32 scopestack_ix;
111	I32 scopestack_max;
112	ANY *savestack;
113	I32 savestack_ix;
114	I32 savestack_max;
115	OP **retstack;
116	I32 retstack_ix;
117	I32 retstack_max;
118	COP *curcop;
119	JMPENV *top_env;
120		185
121	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
122	AV *args;	187	AV *args;
		188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
		191
		192	/* optionally saved, might be zero */
		193	AV *defav; /* @_ */
		194	SV *defsv; /* $_ */
		195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
		199
		200	#define VAR(name,type) type name;
		201	# include "state.h"
		202	#undef VAR
		203
		204	/* statistics */
		205	int usecount; /* number of switches to this coro */
		206
		207	/* coro process data */
		208	int prio;
		209
		210	/* linked list */
		211	struct coro *next, *prev;
		212	HV *hv; /* the perl hash associated with this coro, if any */
123	};	213	};
124		214
125	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
127		217
128	static AV *main_mainstack; /* used to differentiate between $main and others */	218	/** Coro ********************************************************************/
129	static HV *coro_state_stash;
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV *coro_mortal; /* will be freed after next transfer */
134		219
135	/* mostly copied from op.c:cv_clone2 */	220	#define PRIO_MAX 3
136	STATIC AV *	221	#define PRIO_HIGH 1
137	clone_padlist (AV *protopadlist)	222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/** lowlevel stuff **********************************************************/
		234
		235	static AV *
		236	coro_clone_padlist (pTHX_ CV *cv)
138	{	237	{
139	AV *av;	238	AV *padlist = CvPADLIST (cv);
140	I32 ix;
141	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
142	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV *newpadlist, *newpad_name, *newpad;	239	AV *newpadlist, *newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157		240
158	newpadlist = newAV ();	241	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	242	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	243	#if PERL_VERSION_ATLEAST (5,9,0)
		244	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		245	#else
		246	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		247	#endif
		248	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		249	--AvFILLp (padlist);
		250
		251	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	252	av_store (newpadlist, 1, (SV *)newpad);
162		253
163	av = newAV (); /* will be @_ */	254	return newpadlist;
164	av_extend (av, 0);	255	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		256
168	for (ix = fpad; ix > 0; ix--)	257	static void
		258	free_padlist (pTHX_ AV *padlist)
		259	{
		260	/* may be during global destruction */
		261	if (SvREFCNT (padlist))
169	{	262	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	263	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	264	while (i >= 0)
172	{	265	{
173	char *name = SvPVX (namesv); /* XXX */	266	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	267	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	268	{
178	else
179	{ /* our own lexical */
180	SV *sv;	269	SV *sv;
181	if (*name == '&')	270	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	271	SvREFCNT_dec (sv);
183	else if (*name == '@')	272
184	sv = (SV *) newAV ();	273	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	#ifdef SvPADBUSY
190	if (!SvPADBUSY (sv))
191	#endif
192	SvPADMY_on (sv);
193	npad[ix] = sv;
194	}	274	}
195	}	275	}
196	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	276
		277	SvREFCNT_dec ((SV*)padlist);
		278	}
		279	}
		280
		281	static int
		282	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		283	{
		284	AV *padlist;
		285	AV *av = (AV *)mg->mg_obj;
		286
		287	/* casting is fun. */
		288	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		289	free_padlist (aTHX_ padlist);
		290
		291	SvREFCNT_dec (av);
		292
		293	return 0;
		294	}
		295
		296	#define PERL_MAGIC_coro PERL_MAGIC_ext
		297
		298	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		299
		300	#define CORO_MAGIC(cv) \
		301	SvMAGIC (cv) \
		302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		303	? SvMAGIC (cv) \
		304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		305	: 0
		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		332
		333	/* the next two functions merely cache the padlists */
		334	static void
		335	get_padlist (pTHX_ CV *cv)
		336	{
		337	MAGIC *mg = CORO_MAGIC (cv);
		338	AV *av;
		339
		340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		342	else
		343	{
		344	#if CORO_PREFER_PERL_FUNCTIONS
		345	/* this is probably cleaner, but also slower? */
		346	CV *cp = Perl_cv_clone (cv);
		347	CvPADLIST (cv) = CvPADLIST (cp);
		348	CvPADLIST (cp) = 0;
		349	SvREFCNT_dec (cp);
		350	#else
		351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		352	#endif
		353	}
		354	}
		355
		356	static void
		357	put_padlist (pTHX_ CV *cv)
		358	{
		359	MAGIC *mg = CORO_MAGIC (cv);
		360	AV *av;
		361
		362	if (!mg)
		363	{
		364	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		365	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		366	mg->mg_virtual = &vtbl_coro;
		367	mg->mg_obj = (SV *)newAV ();
		368	}
		369
		370	av = (AV *)mg->mg_obj;
		371
		372	if (AvFILLp (av) >= AvMAX (av))
		373	av_extend (av, AvMAX (av) + 1);
		374
		375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		376	}
		377
		378	/** load & save, init *******************************************************/
		379
		380	#define SB do {
		381	#define SE } while (0)
		382
		383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
		384
		385	static void
		386	load_perl (pTHX_ Coro__State c)
		387	{
		388	#define VAR(name,type) PL_ ## name = c->name;
		389	# include "state.h"
		390	#undef VAR
		391
		392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
197	{	400	{
198	npad[ix] = SvREFCNT_inc (ppad[ix]);	401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
199	}	403	}
200	else	404	else
201	{	405	{
202	SV *sv = NEWSV (0, 0);	406	REPLACE_SV (PL_rs, c->irssv);
203	SvPADTMP_on (sv);	407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
204	npad[ix] = sv;	408	sv_setsv (c->irssv_sv, PL_rs);
205	}	409	}
206	}	410	}
207
208	#if 0 /* return -ENOTUNDERSTOOD */
209	/* Now that vars are all in place, clone nested closures. */
210
211	for (ix = fpad; ix > 0; ix--) {
212	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
213	if (namesv
214	&& namesv != &PL_sv_undef
215	&& !(SvFLAGS(namesv) & SVf_FAKE)
216	&& *SvPVX(namesv) == '&'
217	&& CvCLONE(ppad[ix]))
218	{
219	CV *kid = cv_clone((CV*)ppad[ix]);
220	SvREFCNT_dec(ppad[ix]);
221	CvCLONE_on(kid);
222	SvPADMY_on(kid);
223	npad[ix] = (SV*)kid;
224	}
225	}
226	#endif
227
228	return newpadlist;
229	}
230
231	#ifdef MAY_FLUSH
232	STATIC void
233	free_padlist (AV *padlist)
234	{
235	/* may be during global destruction */
236	if (SvREFCNT(padlist))
237	{
238	I32 i = AvFILLp(padlist);
239	while (i >= 0)
240	{
241	SV **svp = av_fetch(padlist, i--, FALSE);
242	SV *sv = svp ? *svp : Nullsv;
243	if (sv)
244	SvREFCNT_dec(sv);
245	}
246
247	SvREFCNT_dec((SV*)padlist);
248	}
249	}
250	#endif
251
252	/* the next two functions merely cache the padlists */
253	STATIC void
254	get_padlist (CV *cv)
255	{
256	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
257
258	if (he && AvFILLp ((AV *)*he) >= 0)
259	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
260	else
261	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
262	}
263
264	STATIC void
265	put_padlist (CV *cv)
266	{
267	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
268
269	if (SvTYPE (*he) != SVt_PVAV)
270	{
271	SvREFCNT_dec (*he);
272	*he = (SV *)newAV ();
273	}
274
275	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
276	}
277
278	#ifdef MAY_FLUSH
279	STATIC void
280	flush_padlist_cache ()
281	{
282	HV *hv = padlist_cache;
283	padlist_cache = newHV ();
284
285	if (hv_iterinit (hv))
286	{
287	HE *he;
288	AV *padlist;
289
290	while (!!(he = hv_iternext (hv)))
291	{
292	AV *av = (AV *)HeVAL(he);
293
294	/* casting is fun. */
295	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
296	free_padlist (padlist);
297	}
298	}
299
300	SvREFCNT_dec (hv);
301	}
302	#endif
303
304	#define SB do {
305	#define SE } while (0)
306
307	#define LOAD(state) load_state(aTHX_ (state));
308	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
309
310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
311
312	static void
313	load_state(pTHX_ Coro__State c)
314	{
315	PL_dowarn = c->dowarn;
316	PL_in_eval = c->in_eval;
317
318	PL_curstackinfo = c->curstackinfo;
319	PL_curstack = c->curstack;
320	PL_mainstack = c->mainstack;
321	PL_stack_sp = c->stack_sp;
322	PL_op = c->op;
323	PL_curpad = c->curpad;
324	PL_comppad = c->comppad;
325	PL_stack_base = c->stack_base;
326	PL_stack_max = c->stack_max;
327	PL_tmps_stack = c->tmps_stack;
328	PL_tmps_floor = c->tmps_floor;
329	PL_tmps_ix = c->tmps_ix;
330	PL_tmps_max = c->tmps_max;
331	PL_markstack = c->markstack;
332	PL_markstack_ptr = c->markstack_ptr;
333	PL_markstack_max = c->markstack_max;
334	PL_scopestack = c->scopestack;
335	PL_scopestack_ix = c->scopestack_ix;
336	PL_scopestack_max = c->scopestack_max;
337	PL_savestack = c->savestack;
338	PL_savestack_ix = c->savestack_ix;
339	PL_savestack_max = c->savestack_max;
340	PL_retstack = c->retstack;
341	PL_retstack_ix = c->retstack_ix;
342	PL_retstack_max = c->retstack_max;
343	PL_curcop = c->curcop;
344	PL_top_env = c->top_env;
345
346	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
347	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
348	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
349		411
350	{	412	{
351	dSP;	413	dSP;
352	CV *cv;	414	CV *cv;
353		415
354	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
355	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
356	{	418	{
357	AV *padlist = (AV *)POPs;
358
359	if (padlist)
360	{
361	put_padlist (cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
362	CvPADLIST(cv) = padlist;	420	CvDEPTH (cv) = PTR2IV (POPs);
363	#ifdef USE_THREADS	421	CvPADLIST (cv) = (AV *)POPs;
364	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
365	#endif
366	}
367
368	++CvDEPTH(cv);
369	}	422	}
370		423
371	PUTBACK;	424	PUTBACK;
372	}	425	}
373	}	426	}
374		427
375	static void	428	static void
376	save_state(pTHX_ Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
377	{	430	{
378	{	431	{
379	dSP;	432	dSP;
380	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
381	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
384	/*	437	/*
385	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
386	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
387	*/	440	*/
388		441
389	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
390	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
391	for (;;)	444	for (;;)
392	{	445	{
393	while (cxix >= 0)	446	while (cxix >= 0)
394	{	447	{
395	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
396		449
397	if (CxTYPE(cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
398	{	451	{
399	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
		453
400	if (CvDEPTH(cv))	454	if (CvDEPTH (cv))
401	{	455	{
402	#ifdef USE_THREADS
403	/*XPUSHs ((SV *)CvOWNER(cv));*/
404	/*CvOWNER(cv) = 0;*/
405	/*error must unlock this cv etc.. etc...*/
406	#endif
407	EXTEND (SP, CvDEPTH(cv)*2);	456	EXTEND (SP, 3);
408
409	while (--CvDEPTH(cv))
410	{
411	/* this tells the restore code to increment CvDEPTH */
412	PUSHs (Nullsv);
413	PUSHs ((SV *)cv);
414	}
415
416	PUSHs ((SV *)CvPADLIST(cv));	457	PUSHs ((SV *)CvPADLIST (cv));
		458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
417	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
418		460
419	get_padlist (cv); /* this is a monster */	461	CvDEPTH (cv) = 0;
		462	get_padlist (aTHX_ cv);
420	}	463	}
421	}	464	}
422	#ifdef CXt_FORMAT
423	else if (CxTYPE(cx) == CXt_FORMAT)
424	{
425	/* I never used formats, so how should I know how these are implemented? */
426	/* my bold guess is as a simple, plain sub... */
427	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
428	}
429	#endif
430	}	465	}
431		466
432	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
433	break;	468	break;
434		469
435	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
436	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
437	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
438	}	473	}
439		474
440	PUTBACK;	475	PUTBACK;
441	}	476	}
442		477
443	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
444	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
445	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
446		483
447	c->dowarn = PL_dowarn;	484	#define VAR(name,type)c->name = PL_ ## name;
448	c->in_eval = PL_in_eval;	485	# include "state.h"
449		486	#undef VAR
450	c->curstackinfo = PL_curstackinfo;
451	c->curstack = PL_curstack;
452	c->mainstack = PL_mainstack;
453	c->stack_sp = PL_stack_sp;
454	c->op = PL_op;
455	c->curpad = PL_curpad;
456	c->comppad = PL_comppad;
457	c->stack_base = PL_stack_base;
458	c->stack_max = PL_stack_max;
459	c->tmps_stack = PL_tmps_stack;
460	c->tmps_floor = PL_tmps_floor;
461	c->tmps_ix = PL_tmps_ix;
462	c->tmps_max = PL_tmps_max;
463	c->markstack = PL_markstack;
464	c->markstack_ptr = PL_markstack_ptr;
465	c->markstack_max = PL_markstack_max;
466	c->scopestack = PL_scopestack;
467	c->scopestack_ix = PL_scopestack_ix;
468	c->scopestack_max = PL_scopestack_max;
469	c->savestack = PL_savestack;
470	c->savestack_ix = PL_savestack_ix;
471	c->savestack_max = PL_savestack_max;
472	c->retstack = PL_retstack;
473	c->retstack_ix = PL_retstack_ix;
474	c->retstack_max = PL_retstack_max;
475	c->curcop = PL_curcop;
476	c->top_env = PL_top_env;
477	}	487	}
478		488
479	/*	489	/*
480	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
481	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
482	* on the assumption that coroutines do not usually need	492	* on the (sometimes correct) assumption that coroutines do
483	* a lot of stackspace.	493	* not usually need a lot of stackspace.
484	*/	494	*/
485	STATIC void	495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
		498	static void
486	coro_init_stacks (pTHX)	499	coro_init_stacks (pTHX)
487	{	500	{
488	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	501	PL_curstackinfo = new_stackinfo(64, 6);
489	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
490	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
491	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
492		505
493	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
494	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
495	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
496		509
497	New(50,PL_tmps_stack,96,SV*);	510	New(50,PL_tmps_stack,64,SV*);
498	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
499	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
500	PL_tmps_max = 96;	513	PL_tmps_max = 64;
501		514
502	New(54,PL_markstack,16,I32);	515	New(54,PL_markstack,16,I32);
503	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
504	PL_markstack_max = PL_markstack + 16;	517	PL_markstack_max = PL_markstack + 16;
505		518
…		…
509		522
510	New(54,PL_scopestack,16,I32);	523	New(54,PL_scopestack,16,I32);
511	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
512	PL_scopestack_max = 16;	525	PL_scopestack_max = 16;
513		526
514	New(54,PL_savestack,96,ANY);	527	New(54,PL_savestack,64,ANY);
515	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
516	PL_savestack_max = 96;	529	PL_savestack_max = 64;
517		530
		531	#if !PERL_VERSION_ATLEAST (5,9,0)
518	New(54,PL_retstack,8,OP*);	532	New(54,PL_retstack,4,OP*);
519	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
520	PL_retstack_max = 8;	534	PL_retstack_max = 4;
		535	#endif
521	}	536	}
		537	#endif
522		538
523	/*	539	/*
524	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
525	*/	541	*/
526	STATIC void	542	static void
527	destroy_stacks(pTHX)	543	coro_destroy_stacks (pTHX)
528	{	544	{
529	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
530	{	546	{
531	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
532	while (PL_scopestack_ix)	548	LEAVE_SCOPE (0);
533	LEAVE;	549	assert (PL_tmps_floor == -1);
534		550
535	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
536	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
537	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
		554
		555	/* unwind all extra stacks */
		556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
538	}	560	}
539		561
540	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
541	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
542		564
543	while (PL_curstackinfo)	565	while (PL_curstackinfo)
544	{	566	{
545	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
546		568
547	{
548	dSP;
549	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
550	PUTBACK; /* possibly superfluous */
551	}
552
553	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
554	{
555	dounwind(-1);
556	SvREFCNT_dec(PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
557	}
558		571
559	Safefree(PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
560	Safefree(PL_curstackinfo);	573	Safefree (PL_curstackinfo);
561	PL_curstackinfo = p;	574	PL_curstackinfo = p;
562	}	575	}
563		576
564	Safefree(PL_tmps_stack);	577	Safefree (PL_tmps_stack);
565	Safefree(PL_markstack);	578	Safefree (PL_markstack);
566	Safefree(PL_scopestack);	579	Safefree (PL_scopestack);
567	Safefree(PL_savestack);	580	Safefree (PL_savestack);
		581	#if !PERL_VERSION_ATLEAST (5,9,0)
568	Safefree(PL_retstack);	582	Safefree (PL_retstack);
		583	#endif
569	}	584	}
		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/** coroutine stack handling ************************************************/
570		618
571	static void	619	static void
572	allocate_stack (Coro__State ctx, int alloc)	620	setup_coro (pTHX_ struct coro *coro)
573	{
574	coro_stack *stack;
575
576	New (0, stack, 1, coro_stack);
577
578	stack->refcnt = 1;
579	stack->usecnt = 1;
580	stack->gencnt = ctx->gencnt = 0;
581	if (alloc)
582	{
583	#if HAVE_MMAP
584	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
585	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586	if (stack->sptr == (void *)-1)
587	#endif
588	{
589	/*FIXME*//*D*//* reasonable stack size! */
590	stack->ssize = -4096 * sizeof (long);
591	New (0, stack->sptr, 4096, long);
592	}
593	}
594	else
595	stack->sptr = 0;
596
597	ctx->stack = stack;
598	}
599
600	static void
601	deallocate_stack (Coro__State ctx)
602	{
603	coro_stack *stack = ctx->stack;
604
605	ctx->stack = 0;
606
607	if (stack)
608	{
609	if (!--stack->refcnt)
610	{
611	#ifdef HAVE_MMAP
612	if (stack->ssize > 0 && stack->sptr)
613	munmap (stack->sptr, stack->ssize);
614	else
615	#endif
616	Safefree (stack->sptr);
617
618	Safefree (stack);
619	}
620	else if (ctx->gencnt == stack->gencnt)
621	--stack->usecnt;
622	}
623	}
624
625	static void
626	setup_coro (void *arg)
627	{	621	{
628	/*	622	/*
629	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
630	*/	624	*/
		625	coro_init_stacks (aTHX);
		626
		627	PL_runops = RUNOPS_DEFAULT;
		628	PL_curcop = &PL_compiling;
		629	PL_in_eval = EVAL_NULL;
		630	PL_comppad = 0;
		631	PL_curpm = 0;
		632	PL_localizing = 0;
		633	PL_dirty = 0;
		634	PL_restartop = 0;
		635
		636	{
		637	dSP;
		638	LOGOP myop;
		639
		640	SvREFCNT_dec (GvAV (PL_defgv));
		641	GvAV (PL_defgv) = coro->args; coro->args = 0;
		642
		643	Zero (&myop, 1, LOGOP);
		644	myop.op_next = Nullop;
		645	myop.op_flags = OPf_WANT_VOID;
		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
		650	PL_op = (OP *)&myop;
		651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		652	SPAGAIN;
		653	}
		654
		655	ENTER; /* necessary e.g. for dounwind */
		656	}
		657
		658	static void
		659	free_coro_mortal (pTHX)
		660	{
		661	if (coro_mortal)
		662	{
		663	SvREFCNT_dec (coro_mortal);
		664	coro_mortal = 0;
		665	}
		666	}
		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (cctx->flags & CC_TRACE_ALL)
		681	{
		682	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		683	{
		684	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		685	SV **bot, **top;
		686	AV *av = newAV (); /* return values */
		687	SV **cb;
		688	dSP;
		689
		690	GV *gv = CvGV (cx->blk_sub.cv);
		691	SV *fullname = sv_2mortal (newSV (0));
		692	if (isGV (gv))
		693	gv_efullname3 (fullname, gv, 0);
		694
		695	bot = PL_stack_base + cx->blk_oldsp + 1;
		696	top = cx->blk_gimme == G_ARRAY ? SP + 1
		697	: cx->blk_gimme == G_SCALAR ? bot + 1
		698	: bot;
		699
		700	while (bot < top)
		701	av_push (av, SvREFCNT_inc (*bot++));
		702
		703	PL_runops = RUNOPS_DEFAULT;
		704	ENTER;
		705	SAVETMPS;
		706	EXTEND (SP, 3);
		707	PUSHMARK (SP);
		708	PUSHs (&PL_sv_no);
		709	PUSHs (fullname);
		710	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		711	PUTBACK;
		712	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		713	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		714	SPAGAIN;
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = runops_trace;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	runops_proc_t old_runops = PL_runops;
		735	dSP;
		736	GV *gv = CvGV (cx->blk_sub.cv);
		737	SV *fullname = sv_2mortal (newSV (0));
		738
		739	if (isGV (gv))
		740	gv_efullname3 (fullname, gv, 0);
		741
		742	PL_runops = RUNOPS_DEFAULT;
		743	ENTER;
		744	SAVETMPS;
		745	EXTEND (SP, 3);
		746	PUSHMARK (SP);
		747	PUSHs (&PL_sv_yes);
		748	PUSHs (fullname);
		749	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		750	PUTBACK;
		751	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		752	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		753	SPAGAIN;
		754	FREETMPS;
		755	LEAVE;
		756	PL_runops = runops_trace;
		757	}
		758
		759	oldcxix = cxstack_ix;
		760	}
		761
		762	if (cctx->flags & CC_TRACE_LINE)
		763	{
		764	dSP;
		765
		766	PL_runops = RUNOPS_DEFAULT;
		767	ENTER;
		768	SAVETMPS;
		769	EXTEND (SP, 3);
		770	PL_runops = RUNOPS_DEFAULT;
		771	PUSHMARK (SP);
		772	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		773	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		774	PUTBACK;
		775	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		776	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		777	SPAGAIN;
		778	FREETMPS;
		779	LEAVE;
		780	PL_runops = runops_trace;
		781	}
		782	}
		783	}
		784	}
		785	}
		786
		787	TAINT_NOT;
		788	return 0;
		789	}
		790
		791	/* inject a fake call to Coro::State::_cctx_init into the execution */
		792	/* _cctx_init should be careful, as it could be called at almost any time */
		793	/* during execution of a perl program */
		794	static void NOINLINE
		795	prepare_cctx (pTHX_ coro_cctx *cctx)
		796	{
631	dSP;	797	dSP;
632	Coro__State ctx = (Coro__State)arg;	798	LOGOP myop;
633	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
634		799
635	coro_init_stacks (aTHX);	800	PL_top_env = &PL_start_env;
636	/*PL_curcop = 0;*/
637	/*PL_in_eval = PL_in_eval;*/ /* inherit */
638	SvREFCNT_dec (GvAV (PL_defgv));
639	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
640		801
		802	if (cctx->flags & CC_TRACE)
		803	PL_runops = runops_trace;
		804
		805	Zero (&myop, 1, LOGOP);
		806	myop.op_next = PL_op;
		807	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		808
		809	PUSHMARK (SP);
		810	EXTEND (SP, 2);
		811	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		812	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		813	PUTBACK;
		814	PL_op = (OP *)&myop;
		815	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
641	SPAGAIN;	816	SPAGAIN;
		817	}
642		818
643	if (ctx->stack)	819	/*
644	{	820	* this is a _very_ stripped down perl interpreter ;)
645	ctx->cursp = 0;	821	*/
		822	static void
		823	coro_run (void *arg)
		824	{
		825	dTHX;
646		826
647	PUSHMARK(SP);	827	/* coro_run is the alternative tail of transfer(), so unlock here. */
648	PUTBACK;	828	UNLOCK;
649	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
650		829
651	if (SvTRUE (ERRSV))	830	/* we now skip the entersub that lead to transfer() */
652	croak (NULL);	831	PL_op = PL_op->op_next;
653	else	832
654	croak ("FATAL: CCTXT coroutine returned!");	833	/* inject a fake subroutine call to cctx_init */
		834	prepare_cctx (aTHX_ (coro_cctx *)arg);
		835
		836	/* somebody or something will hit me for both perl_run and PL_restartop */
		837	PL_restartop = PL_op;
		838	perl_run (PL_curinterp);
		839
		840	/*
		841	* If perl-run returns we assume exit() was being called or the coro
		842	* fell off the end, which seems to be the only valid (non-bug)
		843	* reason for perl_run to return. We try to exit by jumping to the
		844	* bootstrap-time "top" top_env, as we cannot restore the "main"
		845	* coroutine as Coro has no such concept
		846	*/
		847	PL_top_env = main_top_env;
		848	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		849	}
		850
		851	static coro_cctx *
		852	cctx_new ()
		853	{
		854	coro_cctx *cctx;
		855	void *stack_start;
		856	size_t stack_size;
		857
		858	++cctx_count;
		859
		860	Newz (0, cctx, 1, coro_cctx);
		861
		862	#if HAVE_MMAP
		863
		864	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		865	/* mmap supposedly does allocate-on-write for us */
		866	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		867
		868	if (cctx->sptr != (void *)-1)
		869	{
		870	# if CORO_STACKGUARD
		871	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		872	# endif
		873	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		874	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		875	cctx->flags |= CC_MAPPED;
655	}	876	}
656	else	877	else
657	{	878	#endif
658	UNOP myop;
659
660	PL_op = (OP *)&myop;
661
662	Zero(&myop, 1, UNOP);
663	myop.op_next = Nullop;
664	myop.op_flags = OPf_WANT_VOID;
665
666	PUSHMARK(SP);
667	XPUSHs (sub_init);
668	/*
669	* the next line is slightly wrong, as PL_op->op_next
670	* is actually being executed so we skip the first op.
671	* that doesn't matter, though, since it is only
672	* pp_nextstate and we never return...
673	* ah yes, and I don't care anyways ;)
674	*/
675	PUTBACK;
676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
677	SPAGAIN;
678
679	ENTER; /* necessary e.g. for dounwind */
680	}	879	{
		880	cctx->ssize = coro_stacksize * (long)sizeof (long);
		881	New (0, cctx->sptr, coro_stacksize, long);
		882
		883	if (!cctx->sptr)
		884	{
		885	perror ("FATAL: unable to allocate stack for coroutine");
		886	_exit (EXIT_FAILURE);
		887	}
		888
		889	stack_start = cctx->sptr;
		890	stack_size = cctx->ssize;
		891	}
		892
		893	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		894	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		895
		896	return cctx;
681	}	897	}
682		898
683	static void	899	static void
684	continue_coro (void *arg)	900	cctx_destroy (coro_cctx *cctx)
685	{	901	{
686	/*	902	if (!cctx)
687	* this is a _very_ stripped down perl interpreter ;)	903	return;
688	*/
689	Coro__State ctx = (Coro__State)arg;
690	JMPENV coro_start_env;
691		904
692	PL_top_env = &ctx->start_env;	905	--cctx_count;
693		906
694	ctx->cursp = 0;	907	#if CORO_USE_VALGRIND
695	PL_op = PL_op->op_next;	908	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
696	CALLRUNOPS(aTHX);	909	#endif
697		910
698	abort ();	911	#if HAVE_MMAP
699	}	912	if (cctx->flags & CC_MAPPED)
		913	munmap (cctx->sptr, cctx->ssize);
		914	else
		915	#endif
		916	Safefree (cctx->sptr);
700		917
701	STATIC void	918	Safefree (cctx);
		919	}
		920
		921	static coro_cctx *
		922	cctx_get (pTHX)
		923	{
		924	while (cctx_first)
		925	{
		926	coro_cctx *cctx = cctx_first;
		927	cctx_first = cctx->next;
		928	--cctx_idle;
		929
		930	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		931	return cctx;
		932
		933	cctx_destroy (cctx);
		934	}
		935
		936	return cctx_new ();
		937	}
		938
		939	static void
		940	cctx_put (coro_cctx *cctx)
		941	{
		942	/* free another cctx if overlimit */
		943	if (cctx_idle >= MAX_IDLE_CCTX)
		944	{
		945	coro_cctx *first = cctx_first;
		946	cctx_first = first->next;
		947	--cctx_idle;
		948
		949	cctx_destroy (first);
		950	}
		951
		952	++cctx_idle;
		953	cctx->next = cctx_first;
		954	cctx_first = cctx;
		955	}
		956
		957	/** coroutine switching *****************************************************/
		958
		959	static void NOINLINE
		960	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		961	{
		962	if (prev != next)
		963	{
		964	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		965	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		966
		967	if (next->flags & CF_RUNNING)
		968	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		969
		970	if (next->flags & CF_DESTROYED)
		971	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		972
		973	if (PL_lex_state != LEX_NOTPARSING)
		974	croak ("Coro::State::transfer called while parsing, but this is not supported");
		975	}
		976	}
		977
		978	/* always use the TRANSFER macro */
		979	static void NOINLINE
702	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	980	transfer (pTHX_ struct coro *prev, struct coro *next)
703	{	981	{
704	dSTACKLEVEL;	982	dSTACKLEVEL;
705	static struct coro *xnext;
706		983
		984	/* sometimes transfer is only called to set idle_sp */
		985	if (!next)
		986	{
		987	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		988	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		989	}
707	if (prev != next)	990	else if (prev != next)
708	{	991	{
709	xnext = next;	992	coro_cctx *prev__cctx;
710		993
711	if (next->mainstack)	994	if (prev->flags & CF_NEW)
712	{	995	{
713	SAVE (prev, flags);	996	/* create a new empty context */
714	LOAD (next);	997	Newz (0, prev->cctx, 1, coro_cctx);
715		998	prev->flags &= ~CF_NEW;
716	/* mark this state as in-use */	999	prev->flags |= CF_RUNNING;
717	next->mainstack = 0;
718	next->tmps_ix = -2;
719
720	/* stacklevel changed? if yes, grab the stack for us! */
721	if (flags & TRANSFER_SAVE_CCTXT)
722	{
723	if (!prev->stack)
724	allocate_stack (prev, 0);
725	else if (prev->cursp != stacklevel
726	&& prev->stack->usecnt > 1)
727	{
728	prev->gencnt = ++prev->stack->gencnt;
729	prev->stack->usecnt = 1;
730	}
731
732	/* has our stack been invalidated? */
733	if (next->stack && next->stack->gencnt != next->gencnt)
734	{
735	deallocate_stack (next);
736	allocate_stack (next, 1);
737	coro_create (&(next->stack->cctx),
738	continue_coro, (void *)next,
739	next->stack->sptr, labs (next->stack->ssize));
740	}
741
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745
746	}	1000	}
747	else if (next->tmps_ix == -2)	1001
748	croak ("tried to transfer to running coroutine");	1002	prev->flags &= ~CF_RUNNING;
		1003	next->flags |= CF_RUNNING;
		1004
		1005	LOCK;
		1006
		1007	if (next->flags & CF_NEW)
		1008	{
		1009	/* need to start coroutine */
		1010	next->flags &= ~CF_NEW;
		1011	/* first get rid of the old state */
		1012	save_perl (aTHX_ prev);
		1013	/* setup coroutine call */
		1014	setup_coro (aTHX_ next);
		1015	}
749	else	1016	else
750	{	1017	{
751	SAVE (prev, -1); /* first get rid of the old state */	1018	/* coroutine already started */
752		1019	save_perl (aTHX_ prev);
753	if (flags & TRANSFER_SAVE_CCTXT)	1020	load_perl (aTHX_ next);
754	{
755	if (!prev->stack)
756	allocate_stack (prev, 0);
757
758	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
759	{
760	PL_top_env = &next->start_env;
761
762	setup_coro (next);
763
764	prev->stack->refcnt++;
765	prev->stack->usecnt++;
766	next->stack = prev->stack;
767	next->gencnt = prev->gencnt;
768	}
769	else
770	{
771	assert (!next->stack);
772	allocate_stack (next, 1);
773	coro_create (&(next->stack->cctx),
774	setup_coro, (void *)next,
775	next->stack->sptr, labs (next->stack->ssize));
776	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
777	/* don't add any code here */
778	}
779	}
780	else
781	setup_coro (next);
782	}	1021	}
783		1022
784	/*	1023	prev__cctx = prev->cctx;
785	* xnext is now either prev or next, depending on wether	1024
786	* we switched the c stack or not. that's why I use a global	1025	/* possibly "free" the cctx */
787	* variable, that should become thread-specific at one point.	1026	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
788	*/	1027	{
789	xnext->cursp = stacklevel;	1028	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
790	}	1029	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
791		1030
792	if (coro_mortal)	1031	prev->cctx = 0;
		1032
		1033	cctx_put (prev__cctx);
		1034	}
		1035
		1036	++next->usecount;
		1037
		1038	if (!next->cctx)
		1039	next->cctx = cctx_get (aTHX);
		1040
		1041	if (prev__cctx != next->cctx)
		1042	{
		1043	prev__cctx->top_env = PL_top_env;
		1044	PL_top_env = next->cctx->top_env;
		1045	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1046	}
		1047
		1048	free_coro_mortal (aTHX);
		1049	UNLOCK;
793	{	1050	}
794	SvREFCNT_dec (coro_mortal);	1051	}
795	coro_mortal = 0;	1052
		1053	struct transfer_args
		1054	{
		1055	struct coro *prev, *next;
		1056	};
		1057
		1058	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1059	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1060
		1061	/** high level stuff ********************************************************/
		1062
		1063	static int
		1064	coro_state_destroy (pTHX_ struct coro *coro)
		1065	{
		1066	if (coro->flags & CF_DESTROYED)
		1067	return 0;
		1068
		1069	coro->flags |= CF_DESTROYED;
		1070
		1071	if (coro->flags & CF_READY)
796	}	1072	{
797	}	1073	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1074	/* alternative: look through all ready queues and remove the coro */
		1075	LOCK;
		1076	--coro_nready;
		1077	UNLOCK;
		1078	}
		1079	else
		1080	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
798		1081
799	#define SV_CORO(sv,func) \	1082	if (coro->mainstack && coro->mainstack != main_mainstack)
800	do { \	1083	{
801	if (SvROK (sv)) \	1084	struct coro temp;
802	sv = SvRV (sv); \
803	\
804	if (SvTYPE(sv) == SVt_PVHV) \
805	{ \
806	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
807	\
808	if (!he) \
809	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
810	\
811	(sv) = SvRV (HeVAL(he)); \
812	} \
813	\
814	/* must also be changed inside Coro::Cont::yield */ \
815	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
816	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
817	\
818	} while(0)
819		1085
820	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1086	assert (!(coro->flags & CF_RUNNING));
		1087
		1088	Zero (&temp, 1, struct coro);
		1089	temp.save = CORO_SAVE_ALL;
		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
		1096
		1097	coro_destroy_stacks (aTHX);
		1098
		1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1100
		1101	coro->mainstack = 0;
		1102	}
		1103
		1104	cctx_destroy (coro->cctx);
		1105	SvREFCNT_dec (coro->args);
		1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
		1112	}
		1113
		1114	static int
		1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1116	{
		1117	struct coro *coro = (struct coro *)mg->mg_ptr;
		1118	mg->mg_ptr = 0;
		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
		1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
		1127
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1133	{
		1134	struct coro *coro = (struct coro *)mg->mg_ptr;
		1135
		1136	++coro->refcnt;
		1137
		1138	return 0;
		1139	}
		1140
		1141	static MGVTBL coro_state_vtbl = {
		1142	0, 0, 0, 0,
		1143	coro_state_free,
		1144	0,
		1145	#ifdef MGf_DUP
		1146	coro_state_dup,
		1147	#else
		1148	# define MGf_DUP 0
		1149	#endif
		1150	};
821		1151
822	static void	1152	static void
		1153	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1154	{
		1155	ta->prev = SvSTATE (prev_sv);
		1156	ta->next = SvSTATE (next_sv);
		1157	TRANSFER_CHECK (*ta);
		1158	}
		1159
		1160	static void
823	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
824	{	1162	{
825	SV_CORO (prev, "Coro::transfer");	1163	dTHX;
826	SV_CORO (next, "Coro::transfer");	1164	struct transfer_args ta;
827		1165
828	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1167	TRANSFER (ta);
		1168	}
		1169
		1170	static int
		1171	api_save (SV *coro_sv, int new_save)
		1172	{
		1173	dTHX;
		1174	struct coro *coro = SvSTATE (coro_sv);
		1175	int old_save = coro->save;
		1176
		1177	if (new_save >= 0)
		1178	coro->save = new_save;
		1179
		1180	return old_save;
829	}	1181	}
830		1182
831	/** Coro ********************************************************************/	1183	/** Coro ********************************************************************/
832		1184
833	#define PRIO_MAX 3
834	#define PRIO_HIGH 1
835	#define PRIO_NORMAL 0
836	#define PRIO_LOW -1
837	#define PRIO_IDLE -3
838	#define PRIO_MIN -4
839
840	/* for Coro.pm */
841	static GV *coro_current, *coro_idle;
842	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
843	static int coro_nready;
844
845	static void	1185	static void
846	coro_enq (SV *sv)	1186	coro_enq (pTHX_ SV *coro_sv)
847	{	1187	{
848	if (SvTYPE (sv) == SVt_PVHV)
849	{
850	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
851	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
852
853	prio = prio > PRIO_MAX ? PRIO_MAX
854	: prio < PRIO_MIN ? PRIO_MIN
855	: prio;
856
857	av_push (coro_ready [prio - PRIO_MIN], sv);	1188	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
858	coro_nready++;
859
860	return;
861	}
862
863	croak ("Coro::ready tried to enqueue something that is not a coroutine");
864	}	1189	}
865		1190
866	static SV *	1191	static SV *
867	coro_deq (int min_prio)	1192	coro_deq (pTHX_ int min_prio)
868	{	1193	{
869	int prio = PRIO_MAX - PRIO_MIN;	1194	int prio = PRIO_MAX - PRIO_MIN;
870		1195
871	min_prio -= PRIO_MIN;	1196	min_prio -= PRIO_MIN;
872	if (min_prio < 0)	1197	if (min_prio < 0)
873	min_prio = 0;	1198	min_prio = 0;
874		1199
875	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1200	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
876	if (av_len (coro_ready[prio]) >= 0)	1201	if (AvFILLp (coro_ready [prio]) >= 0)
877	{
878	coro_nready--;
879	return av_shift (coro_ready[prio]);	1202	return av_shift (coro_ready [prio]);
880	}
881		1203
882	return 0;	1204	return 0;
883	}	1205	}
884		1206
		1207	static int
		1208	api_ready (SV *coro_sv)
		1209	{
		1210	dTHX;
		1211	struct coro *coro;
		1212
		1213	if (SvROK (coro_sv))
		1214	coro_sv = SvRV (coro_sv);
		1215
		1216	coro = SvSTATE (coro_sv);
		1217
		1218	if (coro->flags & CF_READY)
		1219	return 0;
		1220
		1221	coro->flags |= CF_READY;
		1222
		1223	LOCK;
		1224	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1225	++coro_nready;
		1226	UNLOCK;
		1227
		1228	return 1;
		1229	}
		1230
		1231	static int
		1232	api_is_ready (SV *coro_sv)
		1233	{
		1234	dTHX;
		1235	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1236	}
		1237
885	static void	1238	static void
886	api_ready (SV *coro)	1239	prepare_schedule (pTHX_ struct transfer_args *ta)
887	{	1240	{
888	if (SvROK (coro))	1241	SV *prev_sv, *next_sv;
889	coro = SvRV (coro);
890		1242
891	coro_enq (SvREFCNT_inc (coro));	1243	for (;;)
		1244	{
		1245	LOCK;
		1246	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1247
		1248	/* nothing to schedule: call the idle handler */
		1249	if (!next_sv)
		1250	{
		1251	dSP;
		1252	UNLOCK;
		1253
		1254	ENTER;
		1255	SAVETMPS;
		1256
		1257	PUSHMARK (SP);
		1258	PUTBACK;
		1259	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1260
		1261	FREETMPS;
		1262	LEAVE;
		1263	continue;
		1264	}
		1265
		1266	ta->next = SvSTATE (next_sv);
		1267
		1268	/* cannot transfer to destroyed coros, skip and look for next */
		1269	if (ta->next->flags & CF_DESTROYED)
		1270	{
		1271	UNLOCK;
		1272	SvREFCNT_dec (next_sv);
		1273	/* coro_nready is already taken care of by destroy */
		1274	continue;
		1275	}
		1276
		1277	--coro_nready;
		1278	UNLOCK;
		1279	break;
		1280	}
		1281
		1282	/* free this only after the transfer */
		1283	prev_sv = SvRV (coro_current);
		1284	ta->prev = SvSTATE (prev_sv);
		1285	TRANSFER_CHECK (*ta);
		1286	assert (ta->next->flags & CF_READY);
		1287	ta->next->flags &= ~CF_READY;
		1288	SvRV_set (coro_current, next_sv);
		1289
		1290	LOCK;
		1291	free_coro_mortal (aTHX);
		1292	coro_mortal = prev_sv;
		1293	UNLOCK;
		1294	}
		1295
		1296	static void
		1297	prepare_cede (pTHX_ struct transfer_args *ta)
		1298	{
		1299	api_ready (coro_current);
		1300	prepare_schedule (aTHX_ ta);
		1301	}
		1302
		1303	static int
		1304	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1305	{
		1306	if (coro_nready)
		1307	{
		1308	SV *prev = SvRV (coro_current);
		1309	prepare_schedule (aTHX_ ta);
		1310	api_ready (prev);
		1311	return 1;
		1312	}
		1313	else
		1314	return 0;
892	}	1315	}
893		1316
894	static void	1317	static void
895	api_schedule (void)	1318	api_schedule (void)
896	{	1319	{
897	SV *prev, *next;	1320	dTHX;
		1321	struct transfer_args ta;
898		1322
899	prev = SvRV (GvSV (coro_current));	1323	prepare_schedule (aTHX_ &ta);
900	next = coro_deq (PRIO_MIN);	1324	TRANSFER (ta);
		1325	}
901		1326
902	if (!next)	1327	static int
903	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1328	api_cede (void)
		1329	{
		1330	dTHX;
		1331	struct transfer_args ta;
904		1332
905	/* free this only after the transfer */	1333	prepare_cede (aTHX_ &ta);
906	coro_mortal = prev;
907	SV_CORO (prev, "Coro::schedule");
908		1334
909	SvRV (GvSV (coro_current)) = next;	1335	if (ta.prev != ta.next)
		1336	{
		1337	TRANSFER (ta);
		1338	return 1;
		1339	}
		1340	else
		1341	return 0;
		1342	}
910		1343
911	SV_CORO (next, "Coro::schedule");	1344	static int
		1345	api_cede_notself (void)
		1346	{
		1347	dTHX;
		1348	struct transfer_args ta;
912		1349
913	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1350	if (prepare_cede_notself (aTHX_ &ta))
914	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	1351	{
		1352	TRANSFER (ta);
		1353	return 1;
		1354	}
		1355	else
		1356	return 0;
915	}	1357	}
916		1358
917	static void	1359	static void
918	api_cede (void)	1360	api_trace (SV *coro_sv, int flags)
919	{	1361	{
920	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1362	dTHX;
		1363	struct coro *coro = SvSTATE (coro_sv);
921		1364
922	api_schedule ();	1365	if (flags & CC_TRACE)
923	}	1366	{
		1367	if (!coro->cctx)
		1368	coro->cctx = cctx_new ();
		1369	else if (!(coro->cctx->flags & CC_TRACE))
		1370	croak ("cannot enable tracing on coroutine with custom stack");
924		1371
		1372	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1373	}
		1374	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1375	{
		1376	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1377
		1378	if (coro->flags & CF_RUNNING)
		1379	PL_runops = RUNOPS_DEFAULT;
		1380	else
		1381	coro->runops = RUNOPS_DEFAULT;
		1382	}
		1383	}
		1384
925	MODULE = Coro::State PACKAGE = Coro::State	1385	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
926		1386
927	PROTOTYPES: ENABLE	1387	PROTOTYPES: DISABLE
928		1388
929	BOOT:	1389	BOOT:
930	{ /* {} necessary for stoopid perl-5.6.x */	1390	{
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1391	#ifdef USE_ITHREADS
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1392	MUTEX_INIT (&coro_mutex);
		1393	#endif
		1394	BOOT_PAGESIZE;
		1395
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1396	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		1397
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1400	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1401	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1402
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1403	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1404	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1405	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1406	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1407	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1408	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
939		1409	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
940	if (!padlist_cache)
941	padlist_cache = newHV ();
942		1410
943	main_mainstack = PL_mainstack;	1411	main_mainstack = PL_mainstack;
		1412	main_top_env = PL_top_env;
		1413
		1414	while (main_top_env->je_prev)
		1415	main_top_env = main_top_env->je_prev;
944		1416
945	coroapi.ver = CORO_API_VERSION;	1417	coroapi.ver = CORO_API_VERSION;
946	coroapi.transfer = api_transfer;	1418	coroapi.transfer = api_transfer;
947	}
948		1419
949	Coro::State	1420	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
950	_newprocess(args)	1421	}
951	SV * args	1422
952	PROTOTYPE: $	1423	SV *
		1424	new (char *klass, ...)
953	CODE:	1425	CODE:
954	Coro__State coro;	1426	{
		1427	struct coro *coro;
		1428	HV *hv;
		1429	int i;
955		1430
956	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
957	croak ("Coro::State::_newprocess expects an arrayref");
958
959	Newz (0, coro, 1, struct coro);	1431	Newz (0, coro, 1, struct coro);
		1432	coro->args = newAV ();
		1433	coro->save = CORO_SAVE_DEF;
		1434	coro->flags = CF_NEW;
960		1435
961	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1436	if (coro_first) coro_first->prev = coro;
962	coro->mainstack = 0; /* actual work is done inside transfer */	1437	coro->next = coro_first;
963	coro->stack = 0;	1438	coro_first = coro;
964		1439
965	/* same as JMPENV_BOOTSTRAP */	1440	coro->hv = hv = newHV ();
966	/* we might be able to recycle start_env, but safe is safe */	1441	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
967	//Zero(&coro->start_env, 1, JMPENV);	1442	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
968	coro->start_env.je_ret = -1;
969	coro->start_env.je_mustcatch = TRUE;
970		1443
971	RETVAL = coro;	1444	for (i = 1; i < items; i++)
		1445	av_push (coro->args, newSVsv (ST (i)));
		1446	}
972	OUTPUT:	1447	OUTPUT:
973	RETVAL	1448	RETVAL
974		1449
		1450	int
		1451	save (SV *coro, int new_save = -1)
		1452	CODE:
		1453	RETVAL = api_save (coro, new_save);
		1454	OUTPUT:
		1455	RETVAL
		1456
		1457	int
		1458	save_also (SV *coro_sv, int save_also)
		1459	CODE:
		1460	{
		1461	struct coro *coro = SvSTATE (coro_sv);
		1462	RETVAL = coro->save;
		1463	coro->save |= save_also;
		1464	}
		1465	OUTPUT:
		1466	RETVAL
		1467
975	void	1468	void
976	transfer(prev, next, flags)	1469	_set_stacklevel (...)
977	SV *prev	1470	ALIAS:
978	SV *next	1471	Coro::State::transfer = 1
979	int flags	1472	Coro::schedule = 2
980	PROTOTYPE: @	1473	Coro::cede = 3
		1474	Coro::cede_notself = 4
981	CODE:	1475	CODE:
982	PUTBACK;	1476	{
983	SV_CORO (next, "Coro::transfer");	1477	struct transfer_args ta;
984	SV_CORO (prev, "Coro::transfer");	1478
985	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1479	switch (ix)
986	SPAGAIN;	1480	{
		1481	case 0:
		1482	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1483	ta.next = 0;
		1484	break;
		1485
		1486	case 1:
		1487	if (items != 2)
		1488	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1489
		1490	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1491	break;
		1492
		1493	case 2:
		1494	prepare_schedule (aTHX_ &ta);
		1495	break;
		1496
		1497	case 3:
		1498	prepare_cede (aTHX_ &ta);
		1499	break;
		1500
		1501	case 4:
		1502	if (!prepare_cede_notself (aTHX_ &ta))
		1503	XSRETURN_EMPTY;
		1504
		1505	break;
		1506	}
		1507
		1508	BARRIER;
		1509	TRANSFER (ta);
		1510
		1511	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1512	XSRETURN_YES;
		1513	}
		1514
		1515	bool
		1516	_destroy (SV *coro_sv)
		1517	CODE:
		1518	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1519	OUTPUT:
		1520	RETVAL
987		1521
988	void	1522	void
989	DESTROY(coro)
990	Coro::State coro
991	CODE:
992
993	if (coro->mainstack && coro->mainstack != main_mainstack)
994	{
995	struct coro temp;
996
997	PUTBACK;
998	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
999	LOAD(aTHX_ coro);
1000	SPAGAIN;
1001
1002	destroy_stacks (aTHX);
1003
1004	LOAD((&temp)); /* this will get rid of defsv etc.. */
1005	SPAGAIN;
1006
1007	coro->mainstack = 0;
1008	}
1009
1010	deallocate_stack (coro);
1011	SvREFCNT_dec (coro->args);
1012	Safefree (coro);
1013
1014	void
1015	flush()
1016	CODE:
1017	#ifdef MAY_FLUSH
1018	flush_padlist_cache ();
1019	#endif
1020
1021	void
1022	_exit(code)	1523	_exit (code)
1023	int code	1524	int code
1024	PROTOTYPE: $	1525	PROTOTYPE: $
1025	CODE:	1526	CODE:
1026	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1027	_exit (code);	1527	_exit (code);
1028	#else
1029	signal (SIGTERM, SIG_DFL);
1030	raise (SIGTERM);
1031	exit (code);
1032	#endif
1033		1528
1034	MODULE = Coro::State PACKAGE = Coro::Cont	1529	int
		1530	cctx_stacksize (int new_stacksize = 0)
		1531	CODE:
		1532	RETVAL = coro_stacksize;
		1533	if (new_stacksize)
		1534	coro_stacksize = new_stacksize;
		1535	OUTPUT:
		1536	RETVAL
1035		1537
1036	# this is slightly dirty (should expose a c-level api)	1538	int
		1539	cctx_count ()
		1540	CODE:
		1541	RETVAL = cctx_count;
		1542	OUTPUT:
		1543	RETVAL
		1544
		1545	int
		1546	cctx_idle ()
		1547	CODE:
		1548	RETVAL = cctx_idle;
		1549	OUTPUT:
		1550	RETVAL
1037		1551
1038	void	1552	void
1039	yield(...)	1553	list ()
1040	PROTOTYPE: @	1554	PPCODE:
		1555	{
		1556	struct coro *coro;
		1557	for (coro = coro_first; coro; coro = coro->next)
		1558	if (coro->hv)
		1559	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1560	}
		1561
		1562	void
		1563	call (Coro::State coro, SV *coderef)
		1564	ALIAS:
		1565	eval = 1
		1566	CODE:
		1567	{
		1568	if (coro->mainstack)
		1569	{
		1570	struct coro temp;
		1571	Zero (&temp, 1, struct coro);
		1572	temp.save = CORO_SAVE_ALL;
		1573
		1574	if (!(coro->flags & CF_RUNNING))
		1575	{
		1576	save_perl (aTHX_ &temp);
		1577	load_perl (aTHX_ coro);
		1578	}
		1579
		1580	{
		1581	dSP;
		1582	ENTER;
		1583	SAVETMPS;
		1584	PUSHMARK (SP);
		1585	PUTBACK;
		1586	if (ix)
		1587	eval_sv (coderef, 0);
		1588	else
		1589	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1590	SPAGAIN;
		1591	FREETMPS;
		1592	LEAVE;
		1593	PUTBACK;
		1594	}
		1595
		1596	if (!(coro->flags & CF_RUNNING))
		1597	{
		1598	save_perl (aTHX_ coro);
		1599	load_perl (aTHX_ &temp);
		1600	}
		1601	}
		1602	}
		1603
		1604	SV *
		1605	is_ready (Coro::State coro)
		1606	PROTOTYPE: $
		1607	ALIAS:
		1608	is_ready = CF_READY
		1609	is_running = CF_RUNNING
		1610	is_new = CF_NEW
		1611	is_destroyed = CF_DESTROYED
		1612	CODE:
		1613	RETVAL = boolSV (coro->flags & ix);
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	void
		1618	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1619
		1620	SV *
		1621	has_stack (Coro::State coro)
		1622	PROTOTYPE: $
		1623	CODE:
		1624	RETVAL = boolSV (!!coro->cctx);
		1625	OUTPUT:
		1626	RETVAL
		1627
		1628	int
		1629	is_traced (Coro::State coro)
		1630	PROTOTYPE: $
		1631	CODE:
		1632	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1633	OUTPUT:
		1634	RETVAL
		1635
		1636	IV
		1637	rss (Coro::State coro)
		1638	PROTOTYPE: $
		1639	ALIAS:
		1640	usecount = 1
1041	CODE:	1641	CODE:
1042	static SV *returnstk;	1642	switch (ix)
1043	SV *sv;	1643	{
1044	AV *defav = GvAV (PL_defgv);	1644	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1045	struct coro *prev, *next;	1645	case 1: RETVAL = coro->usecount; break;
		1646	}
		1647	OUTPUT:
		1648	RETVAL
1046		1649
1047	if (!returnstk)
1048	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1049
1050	/* set up @_ -- ugly */
1051	av_clear (defav);
1052	av_fill (defav, items - 1);
1053	while (items--)
1054	av_store (defav, items, SvREFCNT_inc (ST(items)));
1055
1056	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1057	sv = av_pop ((AV *)SvRV (returnstk));
1058	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1059	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1060	SvREFCNT_dec (sv);
1061
1062	transfer(aTHX_ prev, next, 0);
1063		1650
1064	MODULE = Coro::State PACKAGE = Coro	1651	MODULE = Coro::State PACKAGE = Coro
1065		1652
1066	# this is slightly dirty (should expose a c-level api)
1067
1068	BOOT:	1653	BOOT:
1069	{	1654	{
1070	int i;	1655	int i;
		1656
		1657	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1658	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1659	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1660
		1661	coro_current = get_sv ("Coro::current", FALSE);
		1662	SvREADONLY_on (coro_current);
		1663
1071	HV *stash = gv_stashpv ("Coro", TRUE);	1664	coro_stash = gv_stashpv ("Coro", TRUE);
1072		1665
1073	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1666	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1074	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1667	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1075	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1668	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1076	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1669	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1077	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1670	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1078	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1671	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1079
1080	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1081	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1082		1672
1083	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1673	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1084	coro_ready[i] = newAV ();	1674	coro_ready[i] = newAV ();
1085		1675
1086	{	1676	{
1087	SV *sv = perl_get_sv("Coro::API", 1);	1677	SV *sv = perl_get_sv("Coro::API", 1);
1088		1678
1089	coroapi.schedule = api_schedule;	1679	coroapi.schedule = api_schedule;
		1680	coroapi.save = api_save;
1090	coroapi.cede = api_cede;	1681	coroapi.cede = api_cede;
		1682	coroapi.cede_notself = api_cede_notself;
1091	coroapi.ready = api_ready;	1683	coroapi.ready = api_ready;
		1684	coroapi.is_ready = api_is_ready;
1092	coroapi.nready = &coro_nready;	1685	coroapi.nready = &coro_nready;
1093	coroapi.current = coro_current;	1686	coroapi.current = coro_current;
1094		1687
1095	GCoroAPI = &coroapi;	1688	GCoroAPI = &coroapi;
1096	sv_setiv(sv, (IV)&coroapi);	1689	sv_setiv (sv, (IV)&coroapi);
1097	SvREADONLY_on(sv);	1690	SvREADONLY_on (sv);
1098	}	1691	}
1099	}	1692	}
1100		1693
1101	void	1694	void
1102	ready(self)	1695	_set_current (SV *current)
1103	SV * self
1104	PROTOTYPE: $	1696	PROTOTYPE: $
1105	CODE:	1697	CODE:
1106	api_ready (self);	1698	SvREFCNT_dec (SvRV (coro_current));
		1699	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1107		1700
1108	int	1701	int
		1702	prio (Coro::State coro, int newprio = 0)
		1703	ALIAS:
		1704	nice = 1
		1705	CODE:
		1706	{
		1707	RETVAL = coro->prio;
		1708
		1709	if (items > 1)
		1710	{
		1711	if (ix)
		1712	newprio = coro->prio - newprio;
		1713
		1714	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1715	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1716
		1717	coro->prio = newprio;
		1718	}
		1719	}
		1720	OUTPUT:
		1721	RETVAL
		1722
		1723	SV *
		1724	ready (SV *self)
		1725	PROTOTYPE: $
		1726	CODE:
		1727	RETVAL = boolSV (api_ready (self));
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	int
1109	nready(...)	1732	nready (...)
1110	PROTOTYPE:	1733	PROTOTYPE:
1111	CODE:	1734	CODE:
1112	RETVAL = coro_nready;	1735	RETVAL = coro_nready;
1113	OUTPUT:	1736	OUTPUT:
1114	RETVAL	1737	RETVAL
1115		1738
		1739	# for async_pool speedup
1116	void	1740	void
1117	schedule(...)	1741	_pool_1 (SV *cb)
1118	PROTOTYPE:
1119	CODE:	1742	CODE:
1120	api_schedule ();	1743	{
		1744	int i, len;
		1745	HV *hv = (HV *)SvRV (coro_current);
		1746	AV *defav = GvAV (PL_defgv);
		1747	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1748	AV *invoke_av;
		1749
		1750	if (!invoke)
		1751	croak ("\3terminate\2\n");
		1752
		1753	hv_store (hv, "desc", sizeof ("desc") - 1,
		1754	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1755
		1756	invoke_av = (AV *)SvRV (invoke);
		1757	len = av_len (invoke_av);
		1758
		1759	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1760
		1761	if (len > 0)
		1762	{
		1763	av_fill (defav, len - 1);
		1764	for (i = 0; i < len; ++i)
		1765	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1766	}
		1767
		1768	SvREFCNT_dec (invoke);
		1769	}
1121		1770
1122	void	1771	void
1123	cede(...)	1772	_pool_2 (SV *cb)
1124	PROTOTYPE:
1125	CODE:	1773	CODE:
1126	api_cede ();	1774	{
		1775	struct coro *coro = SvSTATE (coro_current);
1127		1776
		1777	sv_setsv (cb, &PL_sv_undef);
		1778
		1779	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1780	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1781	croak ("\3terminate\2\n");
		1782
		1783	av_clear (GvAV (PL_defgv));
		1784	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1785	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1786
		1787	coro->save = CORO_SAVE_DEF;
		1788	coro->prio = 0;
		1789
		1790	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1791	api_trace (coro_current, 0);
		1792
		1793	av_push (av_async_pool, newSVsv (coro_current));
		1794	}
		1795
		1796
		1797	MODULE = Coro::State PACKAGE = Coro::AIO
		1798
		1799	SV *
		1800	_get_state ()
		1801	CODE:
		1802	{
		1803	struct io_state *data;
		1804
		1805	RETVAL = newSV (sizeof (struct io_state));
		1806	data = (struct io_state *)SvPVX (RETVAL);
		1807	SvCUR_set (RETVAL, sizeof (struct io_state));
		1808	SvPOK_only (RETVAL);
		1809
		1810	data->errorno = errno;
		1811	data->laststype = PL_laststype;
		1812	data->laststatval = PL_laststatval;
		1813	data->statcache = PL_statcache;
		1814	}
		1815	OUTPUT:
		1816	RETVAL
		1817
		1818	void
		1819	_set_state (char *data_)
		1820	PROTOTYPE: $
		1821	CODE:
		1822	{
		1823	struct io_state *data = (void *)data_;
		1824
		1825	errno = data->errorno;
		1826	PL_laststype = data->laststype;
		1827	PL_laststatval = data->laststatval;
		1828	PL_statcache = data->statcache;
		1829	}
		1830

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