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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.31 by root, Sun Aug 26 16:36:08 2001 UTC vs.
Revision 1.123 by root, Mon Dec 4 21:56:00 2006 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
		9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	|| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
		23	# ifndef PL_ppaddr
		24	# define PL_ppaddr ppaddr
		25	# endif
		26	# ifndef call_sv
		27	# define call_sv perl_call_sv
		28	# endif
		29	# ifndef get_sv
		30	# define get_sv perl_get_sv
		31	# endif
		32	# ifndef get_cv
		33	# define get_cv perl_get_cv
		34	# endif
		35	# ifndef IS_PADGV
		36	# define IS_PADGV(v) 0
		37	# endif
		38	# ifndef IS_PADCONST
		39	# define IS_PADCONST(v) 0
		40	# endif
		41	#endif
		42
7	#include <signal.h>	43	#include <stdio.h>
		44	#include <errno.h>
		45
		46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		47	# undef STACKGUARD
		48	#endif
		49
		50	#ifndef STACKGUARD
		51	# define STACKGUARD 0
		52	#endif
8		53
9	#ifdef HAVE_MMAP	54	#ifdef HAVE_MMAP
10	# include <unistd.h>	55	# include <unistd.h>
11	# include <sys/mman.h>	56	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	57	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	58	# ifdef MAP_ANON
		59	# define MAP_ANONYMOUS MAP_ANON
15	# else	60	# else
16	# undef HAVE_MMAP	61	# undef HAVE_MMAP
17	# endif	62	# endif
18	# endif	63	# endif
		64	# include <limits.h>
		65	# ifndef PAGESIZE
		66	# define PAGESIZE pagesize
		67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		68	static long pagesize;
		69	# else
		70	# define BOOT_PAGESIZE (void)0
19	#endif	71	# endif
20		72	#else
21	#define MAY_FLUSH /* increases codesize and is rarely used */	73	# define PAGESIZE 0
22		74	# define BOOT_PAGESIZE (void)0
23	#define SUB_INIT "Coro::State::initialize"	75	#endif
24	#define UCORO_STATE "_coro_state"
25		76
26	/* The next macro should declare a variable stacklevel that contains and approximation	77	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	78	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
30		82
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		84
		85	#if __GNUC__ >= 3
		86	# define attribute(x) __attribute__(x)
		87	#else
		88	# define attribute(x)
		89	#endif
		90
		91	#define NOINLINE attribute ((noinline))
32		92
33	#include "CoroAPI.h"	93	#include "CoroAPI.h"
34		94
		95	#ifdef USE_ITHREADS
		96	static perl_mutex coro_mutex;
		97	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		98	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		99	#else
		100	# define LOCK (void)0
		101	# define UNLOCK (void)0
		102	#endif
		103
		104	struct io_state
		105	{
		106	int errorno;
		107	I32 laststype;
		108	int laststatval;
		109	Stat_t statcache;
		110	};
		111
35	static struct CoroAPI coroapi;	112	static struct CoroAPI coroapi;
		113	static AV *main_mainstack; /* used to differentiate between $main and others */
		114	static HV *coro_state_stash, *coro_stash;
		115	static SV *coro_mortal; /* will be freed after next transfer */
36		116
37	/* this is actually not only the c stack but also c registers etc... */	117	static struct coro_cctx *cctx_first;
		118	static int cctx_count, cctx_idle;
		119
		120	/* this is a structure representing a c-level coroutine */
38	typedef struct {	121	typedef struct coro_cctx {
39	int refcnt; /* pointer reference counter */	122	struct coro_cctx *next;
40	int usecnt; /* shared by how many coroutines */
41	int gencnt; /* generation counter */
42		123
43	coro_context cctx;	124	/* the stack */
44
45	void *sptr;	125	void *sptr;
46	long ssize; /* positive == mmap, otherwise malloc */	126	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48		127
		128	/* cpu state */
		129	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		130	JMPENV *top_env;
		131	coro_context cctx;
		132
		133	int inuse;
		134
		135	#if USE_VALGRIND
		136	int valgrind_id;
		137	#endif
		138	} coro_cctx;
		139
		140	enum {
		141	CF_RUNNING = 0x0001, /* coroutine is running */
		142	CF_READY = 0x0002, /* coroutine is ready */
		143	CF_NEW = 0x0004, /* ahs never been switched to */
		144	};
		145
		146	/* this is a structure representing a perl-level coroutine */
49	struct coro {	147	struct coro {
50	/* the optional C context */	148	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	149	coro_cctx *cctx;
52	void *cursp;
53	int gencnt;
54
55	/* optionally saved, might be zero */
56	AV *defav;
57	SV *defsv;
58	SV *errsv;
59
60	/* saved global state not related to stacks */
61	U8 dowarn;
62	I32 in_eval;
63
64	/* the stacks and related info (callchain etc..) */
65	PERL_SI *curstackinfo;
66	AV *curstack;
67	AV *mainstack;
68	SV **stack_sp;
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91		150
92	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
93	AV *args;	152	AV *args;
		153	int refcnt;
		154	int save; /* CORO_SAVE flags */
		155	int flags; /* CF_ flags */
		156
		157	/* optionally saved, might be zero */
		158	AV *defav; /* @_ */
		159	SV *defsv; /* $_ */
		160	SV *errsv; /* $@ */
		161	SV *irssv; /* $/ */
		162	SV *irssv_sv; /* real $/ cache */
		163
		164	#define VAR(name,type) type name;
		165	# include "state.h"
		166	#undef VAR
		167
		168	/* coro process data */
		169	int prio;
94	};	170	};
95		171
96	typedef struct coro *Coro__State;	172	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	173	typedef struct coro *Coro__State_or_hashref;
98		174
99	static AV *main_mainstack; /* used to differentiate between $main and others */	175	static AV *
100	static HV *coro_state_stash;	176	coro_clone_padlist (CV *cv)
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104
105	/* mostly copied from op.c:cv_clone2 */
106	STATIC AV *
107	clone_padlist (AV *protopadlist)
108	{	177	{
109	AV *av;	178	AV *padlist = CvPADLIST (cv);
110	I32 ix;
111	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV *newpadlist, *newpad_name, *newpad;	179	AV *newpadlist, *newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127		180
128	newpadlist = newAV ();	181	newpadlist = newAV ();
129	AvREAL_off (newpadlist);	182	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);	183	#if PERL_VERSION_ATLEAST (5,9,0)
		184	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		185	#else
		186	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		187	#endif
		188	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		189	--AvFILLp (padlist);
		190
		191	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131	av_store (newpadlist, 1, (SV *) newpad);	192	av_store (newpadlist, 1, (SV *)newpad);
132		193
133	av = newAV (); /* will be @_ */	194	return newpadlist;
134	av_extend (av, 0);	195	}
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137		196
138	for (ix = fpad; ix > 0; ix--)	197	static void
		198	free_padlist (AV *padlist)
		199	{
		200	/* may be during global destruction */
		201	if (SvREFCNT (padlist))
139	{	202	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	203	I32 i = AvFILLp (padlist);
141	if (namesv && namesv != &PL_sv_undef)	204	while (i >= 0)
142	{	205	{
143	char *name = SvPVX (namesv); /* XXX */	206	SV **svp = av_fetch (padlist, i--, FALSE);
144	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	207	if (svp)
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}	208	{
148	else
149	{ /* our own lexical */
150	SV *sv;	209	SV *sv;
151	if (*name == '&')	210	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
152	sv = SvREFCNT_inc (ppad[ix]);	211	SvREFCNT_dec (sv);
153	else if (*name == '@')	212
154	sv = (SV *) newAV ();	213	SvREFCNT_dec (*svp);
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}	214	}
163	}	215	}
164	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	216
165	{	217	SvREFCNT_dec ((SV*)padlist);
166	npad[ix] = SvREFCNT_inc (ppad[ix]);
167	}
168	else
169	{
170	SV *sv = NEWSV (0, 0);
171	SvPADTMP_on (sv);
172	npad[ix] = sv;
173	}
174	}	218	}
		219	}
175		220
176	#if 0 /* return -ENOTUNDERSTOOD */	221	static int
177	/* Now that vars are all in place, clone nested closures. */	222	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		223	{
		224	AV *padlist;
		225	AV *av = (AV *)mg->mg_obj;
178		226
179	for (ix = fpad; ix > 0; ix--) {	227	/* casting is fun. */
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	228	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
181	if (namesv	229	free_padlist (padlist);
182	&& namesv != &PL_sv_undef	230
183	&& !(SvFLAGS(namesv) & SVf_FAKE)	231	SvREFCNT_dec (av);
184	&& *SvPVX(namesv) == '&'	232
185	&& CvCLONE(ppad[ix]))	233	return 0;
186	{	234	}
187	CV *kid = cv_clone((CV*)ppad[ix]);	235
188	SvREFCNT_dec(ppad[ix]);	236	#define PERL_MAGIC_coro PERL_MAGIC_ext
189	CvCLONE_on(kid);	237
190	SvPADMY_on(kid);	238	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
191	npad[ix] = (SV*)kid;	239
192	}	240	#define CORO_MAGIC(cv) \
		241	SvMAGIC (cv) \
		242	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		243	? SvMAGIC (cv) \
		244	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		245	: 0
		246
		247	/* the next two functions merely cache the padlists */
		248	static void
		249	get_padlist (CV *cv)
		250	{
		251	MAGIC *mg = CORO_MAGIC (cv);
		252	AV *av;
		253
		254	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		255	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		256	else
		257	{
		258	#if 0
		259	/* this is probably cleaner, but also slower? */
		260	CV *cp = Perl_cv_clone (cv);
		261	CvPADLIST (cv) = CvPADLIST (cp);
		262	CvPADLIST (cp) = 0;
		263	SvREFCNT_dec (cp);
		264	#else
		265	CvPADLIST (cv) = coro_clone_padlist (cv);
		266	#endif
		267	}
		268	}
		269
		270	static void
		271	put_padlist (CV *cv)
		272	{
		273	MAGIC *mg = CORO_MAGIC (cv);
		274	AV *av;
		275
		276	if (!mg)
		277	{
		278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		280	mg->mg_virtual = &vtbl_coro;
		281	mg->mg_obj = (SV *)newAV ();
193	}	282	}
194	#endif
195		283
196	return newpadlist;	284	av = (AV *)mg->mg_obj;
197	}
198		285
199	#ifdef MAY_FLUSH	286	if (AvFILLp (av) >= AvMAX (av))
200	STATIC void	287	av_extend (av, AvMAX (av) + 1);
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV *sv = svp ? *svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214		288
215	SvREFCNT_dec((SV*)padlist);	289	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
216	}
217	}	290	}
218	#endif
219
220	/* the next two functions merely cache the padlists */
221	STATIC void
222	get_padlist (CV *cv)
223	{
224	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226	if (he && AvFILLp ((AV *)*he) >= 0)
227	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228	else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230	}
231
232	STATIC void
233	put_padlist (CV *cv)
234	{
235	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237	if (SvTYPE (*he) != SVt_PVAV)
238	{
239	SvREFCNT_dec (*he);
240	*he = (SV *)newAV ();
241	}
242
243	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244	}
245
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{
255	HE *he;
256	AV *padlist;
257
258	while (!!(he = hv_iternext (hv)))
259	{
260	AV *av = (AV *)HeVAL(he);
261
262	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);
265	}
266	}
267
268	SvREFCNT_dec (hv);
269	}
270	#endif
271		291
272	#define SB do {	292	#define SB do {
273	#define SE } while (0)	293	#define SE } while (0)
274		294
275	#define LOAD(state) load_state(aTHX_ (state));
276	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	295	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
279		296
280	static void	297	static void
281	load_state(pTHX_ Coro__State c)	298	load_perl (Coro__State c)
282	{	299	{
283	PL_dowarn = c->dowarn;	300	#define VAR(name,type) PL_ ## name = c->name;
284	PL_in_eval = c->in_eval;	301	# include "state.h"
285		302	#undef VAR
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312		303
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		307	if (c->irssv)
		308	{
		309	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		310	SvREFCNT_dec (c->irssv);
		311	else
		312	{
		313	REPLACE_SV (PL_rs, c->irssv);
		314	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		315	sv_setsv (c->irssv_sv, PL_rs);
		316	}
		317	}
316		318
317	{	319	{
318	dSP;	320	dSP;
319	CV *cv;	321	CV *cv;
320		322
321	/* now do the ugly restore mess */	323	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))	324	while ((cv = (CV *)POPs))
323	{	325	{
324	AV *padlist = (AV *)POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */	326	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;	327	CvDEPTH (cv) = PTR2IV (POPs);
330	#ifdef USE_THREADS	328	CvPADLIST (cv) = (AV *)POPs;
331	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}	329	}
337		330
338	PUTBACK;	331	PUTBACK;
339	}	332	}
340	}	333	}
341		334
342	static void	335	static void
343	save_state(pTHX_ Coro__State c, int flags)	336	save_perl (Coro__State c)
344	{	337	{
345	{	338	{
346	dSP;	339	dSP;
347	I32 cxix = cxstack_ix;	340	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;	341	PERL_CONTEXT *ccstk = cxstack;
…		…
359	{	352	{
360	while (cxix >= 0)	353	while (cxix >= 0)
361	{	354	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];	355	PERL_CONTEXT *cx = &ccstk[cxix--];
363		356
364	if (CxTYPE(cx) == CXt_SUB)	357	if (CxTYPE (cx) == CXt_SUB)
365	{	358	{
366	CV *cv = cx->blk_sub.cv;	359	CV *cv = cx->blk_sub.cv;
		360
367	if (CvDEPTH(cv))	361	if (CvDEPTH (cv))
368	{	362	{
369	#ifdef USE_THREADS
370	/*XPUSHs ((SV *)CvOWNER(cv));*/
371	/*CvOWNER(cv) = 0;*/
372	/*error must unlock this cv etc.. etc...*/
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);	363	EXTEND (SP, 3);
375		364
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382
383	PUSHs ((SV *)CvPADLIST(cv));	365	PUSHs ((SV *)CvPADLIST (cv));
		366	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
385		368
		369	CvDEPTH (cv) = 0;
386	get_padlist (cv); /* this is a monster */	370	get_padlist (cv);
387	}	371	}
388	}	372	}
		373	#ifdef CXt_FORMAT
389	else if (CxTYPE(cx) == CXt_FORMAT)	374	else if (CxTYPE (cx) == CXt_FORMAT)
390	{	375	{
391	/* I never used formats, so how should I know how these are implemented? */	376	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */	377	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	378	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}	379	}
		380	#endif
395	}	381	}
396		382
397	if (top_si->si_type == PERLSI_MAIN)	383	if (top_si->si_type == PERLSI_MAIN)
398	break;	384	break;
399		385
…		…
403	}	389	}
404		390
405	PUTBACK;	391	PUTBACK;
406	}	392	}
407		393
408	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	394	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
409	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	395	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
410	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	396	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		397	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
411		398
412	c->dowarn = PL_dowarn;	399	#define VAR(name,type)c->name = PL_ ## name;
413	c->in_eval = PL_in_eval;	400	# include "state.h"
414		401	#undef VAR
415	c->curstackinfo = PL_curstackinfo;
416	c->curstack = PL_curstack;
417	c->mainstack = PL_mainstack;
418	c->stack_sp = PL_stack_sp;
419	c->op = PL_op;
420	c->curpad = PL_curpad;
421	c->stack_base = PL_stack_base;
422	c->stack_max = PL_stack_max;
423	c->tmps_stack = PL_tmps_stack;
424	c->tmps_floor = PL_tmps_floor;
425	c->tmps_ix = PL_tmps_ix;
426	c->tmps_max = PL_tmps_max;
427	c->markstack = PL_markstack;
428	c->markstack_ptr = PL_markstack_ptr;
429	c->markstack_max = PL_markstack_max;
430	c->scopestack = PL_scopestack;
431	c->scopestack_ix = PL_scopestack_ix;
432	c->scopestack_max = PL_scopestack_max;
433	c->savestack = PL_savestack;
434	c->savestack_ix = PL_savestack_ix;
435	c->savestack_max = PL_savestack_max;
436	c->retstack = PL_retstack;
437	c->retstack_ix = PL_retstack_ix;
438	c->retstack_max = PL_retstack_max;
439	c->curcop = PL_curcop;
440	c->top_env = PL_top_env;
441	}	402	}
442		403
443	/*	404	/*
444	* allocate various perl stacks. This is an exact copy	405	* allocate various perl stacks. This is an exact copy
445	* of perl.c:init_stacks, except that it uses less memory	406	* of perl.c:init_stacks, except that it uses less memory
446	* on the assumption that coroutines do not usually need	407	* on the (sometimes correct) assumption that coroutines do
447	* a lot of stackspace.	408	* not usually need a lot of stackspace.
448	*/	409	*/
449	STATIC void	410	static void
450	coro_init_stacks (pTHX)	411	coro_init_stacks ()
451	{	412	{
452	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	413	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
453	PL_curstackinfo->si_type = PERLSI_MAIN;	414	PL_curstackinfo->si_type = PERLSI_MAIN;
454	PL_curstack = PL_curstackinfo->si_stack;	415	PL_curstack = PL_curstackinfo->si_stack;
455	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	416	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456		417
457	PL_stack_base = AvARRAY(PL_curstack);	418	PL_stack_base = AvARRAY(PL_curstack);
458	PL_stack_sp = PL_stack_base;	419	PL_stack_sp = PL_stack_base;
459	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	420	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460		421
461	New(50,PL_tmps_stack,96,SV*);	422	New(50,PL_tmps_stack,128,SV*);
462	PL_tmps_floor = -1;	423	PL_tmps_floor = -1;
463	PL_tmps_ix = -1;	424	PL_tmps_ix = -1;
464	PL_tmps_max = 96;	425	PL_tmps_max = 128;
465		426
466	New(54,PL_markstack,16,I32);	427	New(54,PL_markstack,32,I32);
467	PL_markstack_ptr = PL_markstack;	428	PL_markstack_ptr = PL_markstack;
468	PL_markstack_max = PL_markstack + 16;	429	PL_markstack_max = PL_markstack + 32;
469		430
		431	#ifdef SET_MARK_OFFSET
470	SET_MARK_OFFSET;	432	SET_MARK_OFFSET;
		433	#endif
471		434
472	New(54,PL_scopestack,16,I32);	435	New(54,PL_scopestack,32,I32);
473	PL_scopestack_ix = 0;	436	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	437	PL_scopestack_max = 32;
475		438
476	New(54,PL_savestack,96,ANY);	439	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	440	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	441	PL_savestack_max = 64;
479		442
		443	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	444	New(54,PL_retstack,16,OP*);
481	PL_retstack_ix = 0;	445	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	446	PL_retstack_max = 16;
		447	#endif
483	}	448	}
484		449
485	/*	450	/*
486	* destroy the stacks, the callchain etc...	451	* destroy the stacks, the callchain etc...
487	* still there is a memleak of 128 bytes...
488	*/	452	*/
489	STATIC void	453	static void
490	destroy_stacks(pTHX)	454	coro_destroy_stacks ()
491	{	455	{
492	int destruct = PL_main_cv != Nullcv;	456	if (!IN_DESTRUCT)
493
494	if (destruct)
495	{	457	{
496	/* is this ugly, I ask? */	458	/* is this ugly, I ask? */
497	while (PL_scopestack_ix)	459	LEAVE_SCOPE (0);
498	LEAVE;
499		460
500	/* sure it is, but more important: is it correct?? :/ */	461	/* sure it is, but more important: is it correct?? :/ */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;	462	FREETMPS;
		463
		464	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503	}	465	}
504		466
505	while (PL_curstackinfo->si_next)	467	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	468	PL_curstackinfo = PL_curstackinfo->si_next;
507		469
508	while (PL_curstackinfo)	470	while (PL_curstackinfo)
509	{	471	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	472	PERL_SI *p = PL_curstackinfo->si_prev;
511		473
512	{	474	{ /*D*//*remove*/
513	dSP;	475	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	476	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */	477	PUTBACK; /* possibly superfluous */
516	}	478	}
517		479
518	if (destruct)	480	if (!IN_DESTRUCT)
519	{	481	{
520	dounwind(-1);	482	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	483	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}	484	}
523		485
524	Safefree(PL_curstackinfo->si_cxstack);	486	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	487	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	488	PL_curstackinfo = p;
527	}	489	}
528		490
529	Safefree(PL_tmps_stack);	491	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	492	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	493	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	494	Safefree (PL_savestack);
		495	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	496	Safefree (PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#ifdef HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif	497	#endif
553	{
554	/*FIXME*//*D*//* reasonable stack size! */
555	stack->ssize = -4096 * sizeof (long);
556	New (0, stack->sptr, 4096, long);
557	}
558	}
559	else
560	stack->sptr = 0;
561
562	ctx->stack = stack;
563	}	498	}
564		499
565	static void	500	static void
566	deallocate_stack (Coro__State ctx)	501	setup_coro (struct coro *coro)
567	{
568	coro_stack *stack = ctx->stack;
569
570	ctx->stack = 0;
571
572	if (stack)
573	{
574	if (!--stack->refcnt)
575	{
576	#ifdef HAVE_MMAP
577	if (stack->ssize > 0 && stack->sptr)
578	munmap (stack->sptr, stack->ssize);
579	else
580	#else
581	Safefree (stack->sptr);
582	#endif
583	Safefree (stack);
584	}
585	else if (ctx->gencnt == stack->gencnt)
586	--stack->usecnt;
587	}
588	}
589
590	static void
591	setup_coro (void *arg)
592	{	502	{
593	/*	503	/*
594	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
595	*/	505	*/
		506
		507	coro_init_stacks ();
		508
		509	PL_curcop = &PL_compiling;
		510	PL_in_eval = EVAL_NULL;
		511	PL_curpm = 0;
		512	PL_localizing = 0;
		513	PL_dirty = 0;
		514	PL_restartop = 0;
		515
		516	{
		517	dSP;
		518	LOGOP myop;
		519
		520	SvREFCNT_dec (GvAV (PL_defgv));
		521	GvAV (PL_defgv) = coro->args; coro->args = 0;
		522
		523	Zero (&myop, 1, LOGOP);
		524	myop.op_next = Nullop;
		525	myop.op_flags = OPf_WANT_VOID;
		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		529	PUTBACK;
		530	PL_op = (OP *)&myop;
		531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		532	SPAGAIN;
		533	}
		534
		535	ENTER; /* necessary e.g. for dounwind */
		536	}
		537
		538	static void
		539	free_coro_mortal ()
		540	{
		541	if (coro_mortal)
		542	{
		543	SvREFCNT_dec (coro_mortal);
		544	coro_mortal = 0;
		545	}
		546	}
		547
		548	/* inject a fake call to Coro::State::_cctx_init into the execution */
		549	static void NOINLINE
		550	prepare_cctx (coro_cctx *cctx)
		551	{
596	dSP;	552	dSP;
597	Coro__State ctx = (Coro__State)arg;	553	LOGOP myop;
598	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599		554
600	coro_init_stacks (aTHX);	555	Zero (&myop, 1, LOGOP);
601	/*PL_curcop = 0;*/	556	myop.op_next = PL_op;
602	/*PL_in_eval = PL_in_eval;*/ /* inherit */	557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605		558
		559	PUSHMARK (SP);
		560	EXTEND (SP, 2);
		561	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		562	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		563	PUTBACK;
		564	PL_op = (OP *)&myop;
		565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
606	SPAGAIN;	566	SPAGAIN;
607
608	if (ctx->stack)
609	{
610	ctx->cursp = 0;
611
612	PUSHMARK(SP);
613	PUTBACK;
614	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616	if (SvTRUE (ERRSV))
617	croak (NULL);
618	else
619	croak ("FATAL: CCTXT coroutine returned!");
620	}
621	else
622	{
623	UNOP myop;
624
625	PL_op = (OP *)&myop;
626
627	Zero(&myop, 1, UNOP);
628	myop.op_next = Nullop;
629	myop.op_flags = OPf_WANT_VOID;
630
631	PUSHMARK(SP);
632	XPUSHs (sub_init);
633	/*
634	* the next line is slightly wrong, as PL_op->op_next
635	* is actually being executed so we skip the first op.
636	* that doesn't matter, though, since it is only
637	* pp_nextstate and we never return...
638	* ah yes, and I don't care anyways ;)
639	*/
640	PUTBACK;
641	PL_op = pp_entersub();
642	SPAGAIN;
643
644	ENTER; /* necessary e.g. for dounwind */
645	}
646	}	567	}
647		568
648	static void	569	static void
649	continue_coro (void *arg)	570	coro_run (void *arg)
650	{	571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
		573	UNLOCK;
		574
651	/*	575	/*
652	* this is a _very_ stripped down perl interpreter ;)	576	* this is a _very_ stripped down perl interpreter ;)
653	*/	577	*/
654	Coro__State ctx = (Coro__State)arg;	578	PL_top_env = &PL_start_env;
655		579
656	/*FIXME*//* must set up top_env here */	580	/* inject call to cctx_init */
657	ctx->cursp = 0;	581	prepare_cctx ((coro_cctx *)arg);
658	PL_op = PL_op->op_next;
659	CALLRUNOPS(aTHX);
660		582
		583	/* somebody will hit me for both perl_run and PL_restartop */
		584	PL_restartop = PL_op;
		585	perl_run (PL_curinterp);
		586
		587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
661	abort ();	588	abort ();
662	}	589	}
663		590
664	STATIC void	591	static coro_cctx *
		592	cctx_new ()
		593	{
		594	coro_cctx *cctx;
		595
		596	++cctx_count;
		597
		598	New (0, cctx, 1, coro_cctx);
		599
		600	#if HAVE_MMAP
		601
		602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		603	/* mmap supposedly does allocate-on-write for us */
		604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		605
		606	if (cctx->sptr == (void *)-1)
		607	{
		608	perror ("FATAL: unable to mmap stack for coroutine");
		609	_exit (EXIT_FAILURE);
		610	}
		611
		612	# if STACKGUARD
		613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		614	# endif
		615
		616	#else
		617
		618	cctx->ssize = STACKSIZE * (long)sizeof (long);
		619	New (0, cctx->sptr, STACKSIZE, long);
		620
		621	if (!cctx->sptr)
		622	{
		623	perror ("FATAL: unable to malloc stack for coroutine");
		624	_exit (EXIT_FAILURE);
		625	}
		626
		627	#endif
		628
		629	#if USE_VALGRIND
		630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		632	cctx->ssize + (char *)cctx->sptr
		633	);
		634	#endif
		635
		636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		637
		638	return cctx;
		639	}
		640
		641	static void
		642	cctx_destroy (coro_cctx *cctx)
		643	{
		644	if (!cctx)
		645	return;
		646
		647	--cctx_count;
		648
		649	#if USE_VALGRIND
		650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		651	#endif
		652
		653	#if HAVE_MMAP
		654	munmap (cctx->sptr, cctx->ssize);
		655	#else
		656	Safefree (cctx->sptr);
		657	#endif
		658
		659	Safefree (cctx);
		660	}
		661
		662	static coro_cctx *
		663	cctx_get ()
		664	{
		665	coro_cctx *cctx;
		666
		667	if (cctx_first)
		668	{
		669	cctx = cctx_first;
		670	cctx_first = cctx->next;
		671	--cctx_idle;
		672	}
		673	else
		674	{
		675	cctx = cctx_new ();
		676	PL_op = PL_op->op_next;
		677	}
		678
		679	return cctx;
		680	}
		681
		682	static void
		683	cctx_put (coro_cctx *cctx)
		684	{
		685	/* free another cctx if overlimit */
		686	if (cctx_idle >= MAX_IDLE_CCTX)
		687	{
		688	coro_cctx *first = cctx_first;
		689	cctx_first = first->next;
		690	--cctx_idle;
		691
		692	assert (!first->inuse);
		693	cctx_destroy (first);
		694	}
		695
		696	++cctx_idle;
		697	cctx->next = cctx_first;
		698	cctx_first = cctx;
		699	}
		700
		701	/* never call directly, always through the coro_state_transfer global variable */
		702	static void NOINLINE
665	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	703	transfer (struct coro *prev, struct coro *next)
666	{	704	{
667	dSTACKLEVEL;	705	dSTACKLEVEL;
668	static struct coro *xnext;
669		706
		707	/* sometimes transfer is only called to set idle_sp */
		708	if (!next)
		709	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
670	if (prev != next)	710	else if (prev != next)
671	{	711	{
672	xnext = next;	712	coro_cctx *prev__cctx;
673		713
674	if (next->mainstack)	714	if (prev->flags & CF_NEW)
675	{	715	{
676	SAVE (prev, flags);	716	/* create a new empty context */
677	LOAD (next);	717	Newz (0, prev->cctx, 1, coro_cctx);
678		718	prev->cctx->inuse = 1;
679	/* mark this state as in-use */	719	prev->flags &= ~CF_NEW;
680	next->mainstack = 0;	720	prev->flags |= CF_RUNNING;
681	next->tmps_ix = -2;
682
683	/* stacklevel changed? if yes, grab the stack for us! */
684	if (flags & TRANSFER_SAVE_CCTXT)
685	{
686	if (!prev->stack)
687	allocate_stack (prev, 0);
688	else if (prev->cursp != stacklevel
689	&& prev->stack->usecnt > 1)
690	{
691	prev->gencnt = ++prev->stack->gencnt;
692	prev->stack->usecnt = 1;
693	}
694
695	/* has our stack been invalidated? */
696	if (next->stack && next->stack->gencnt != next->gencnt)
697	{
698	deallocate_stack (next);
699	allocate_stack (next, 1);
700	coro_create (&(next->stack->cctx),
701	continue_coro, (void *)next,
702	next->stack->sptr, labs (next->stack->ssize));
703	}
704
705	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
706	/* don't add any code here */
707	}
708
709	}	721	}
710	else if (next->tmps_ix == -2)	722
711	croak ("tried to transfer to running coroutine");	723	/*TODO: must not croak here */
		724	if (!prev->flags & CF_RUNNING)
		725	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		726
		727	if (next->flags & CF_RUNNING)
		728	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		729
		730	prev->flags &= ~CF_RUNNING;
		731	next->flags |= CF_RUNNING;
		732
		733	LOCK;
		734
		735	if (next->flags & CF_NEW)
		736	{
		737	/* need to start coroutine */
		738	next->flags &= ~CF_NEW;
		739	/* first get rid of the old state */
		740	save_perl (prev);
		741	/* setup coroutine call */
		742	setup_coro (next);
		743	/* need a new stack */
		744	assert (!next->stack);
		745	}
712	else	746	else
713	{	747	{
714	SAVE (prev, -1); /* first get rid of the old state */	748	/* coroutine already started */
715		749	save_perl (prev);
716	if (flags & TRANSFER_SAVE_CCTXT)	750	load_perl (next);
717	{
718	if (!prev->stack)
719	allocate_stack (prev, 0);
720
721	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
722	{
723	setup_coro (next);
724
725	prev->stack->refcnt++;
726	prev->stack->usecnt++;
727	next->stack = prev->stack;
728	next->gencnt = prev->gencnt;
729	}
730	else
731	{
732	allocate_stack (next, 1);
733	coro_create (&(next->stack->cctx),
734	setup_coro, (void *)next,
735	next->stack->sptr, labs (next->stack->ssize));
736	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
737	/* don't add any code here */
738	}
739	}
740	else
741	setup_coro (next);
742	}	751	}
		752
		753	prev__cctx = prev->cctx;
		754
		755	/* possibly "free" the cctx */
		756	if (prev__cctx->idle_sp == STACKLEVEL)
		757	{
		758	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		759	assert (PL_top_env == prev__cctx->top_env);
		760
		761	prev->cctx = 0;
		762
		763	cctx_put (prev__cctx);
		764	prev__cctx->inuse = 0;
		765	}
		766
		767	if (!next->cctx)
		768	{
		769	next->cctx = cctx_get ();
		770	assert (!next->cctx->inuse);
		771	next->cctx->inuse = 1;
		772	}
		773
		774	if (prev__cctx != next->cctx)
		775	{
		776	prev__cctx->top_env = PL_top_env;
		777	PL_top_env = next->cctx->top_env;
		778	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		779	}
		780
		781	free_coro_mortal ();
		782
		783	UNLOCK;
743	}	784	}
744
745	/*
746	* xnext is now either prev or next, depending on wether
747	* we switched the c stack or not. that's why i use a global
748	* variable, that should become thread-specific at one point.
749	*/
750	xnext->cursp = stacklevel;
751	}	785	}
		786
		787	struct transfer_args
		788	{
		789	struct coro *prev, *next;
		790	};
		791
		792	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		793
		794	static void
		795	coro_state_destroy (struct coro *coro)
		796	{
		797	if (coro->refcnt--)
		798	return;
		799
		800	if (coro->mainstack && coro->mainstack != main_mainstack)
		801	{
		802	struct coro temp;
		803	Zero (&temp, 1, struct coro);
		804	temp.save = CORO_SAVE_ALL;
		805
		806	if (coro->flags & CF_RUNNING)
		807	croak ("FATAL: tried to destroy currently running coroutine");
		808
		809	save_perl (&temp);
		810	load_perl (coro);
		811
		812	coro_destroy_stacks ();
		813
		814	load_perl (&temp); /* this will get rid of defsv etc.. */
		815
		816	coro->mainstack = 0;
		817	}
		818
		819	cctx_destroy (coro->cctx);
		820	SvREFCNT_dec (coro->args);
		821	Safefree (coro);
		822	}
		823
		824	static int
		825	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		826	{
		827	struct coro *coro = (struct coro *)mg->mg_ptr;
		828	mg->mg_ptr = 0;
		829
		830	coro_state_destroy (coro);
		831
		832	return 0;
		833	}
		834
		835	static int
		836	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		837	{
		838	struct coro *coro = (struct coro *)mg->mg_ptr;
		839
		840	++coro->refcnt;
		841
		842	return 0;
		843	}
		844
		845	static MGVTBL coro_state_vtbl = {
		846	0, 0, 0, 0,
		847	coro_state_clear,
		848	0,
		849	#ifdef MGf_DUP
		850	coro_state_dup,
		851	#else
		852	# define MGf_DUP 0
		853	#endif
		854	};
752		855
753	static struct coro *	856	static struct coro *
754	sv_to_coro (SV *arg, const char *funcname, const char *varname)	857	SvSTATE (SV *coro)
755	{	858	{
756	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	859	HV *stash;
		860	MAGIC *mg;
		861
		862	if (SvROK (coro))
		863	coro = SvRV (coro);
		864
		865	stash = SvSTASH (coro);
		866	if (stash != coro_stash && stash != coro_state_stash)
757	{	867	{
758	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	868	/* very slow, but rare, check */
759		869	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
760	if (!he)	870	croak ("Coro::State object required");
761	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
762
763	arg = HeVAL(he);
764	}	871	}
765
766	/* must also be changed inside Coro::Cont::yield */
767	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
768	return (struct coro *) SvIV((SV*)SvRV(arg));
769		872
770	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	873	mg = SvMAGIC (coro);
771	/*NORETURN*/	874	assert (mg->mg_type == PERL_MAGIC_ext);
		875	return (struct coro *)mg->mg_ptr;
772	}	876	}
773		877
		878	static void
		879	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		880	{
		881	ta->prev = SvSTATE (prev_sv);
		882	ta->next = SvSTATE (next_sv);
		883	}
		884
		885	static void
		886	api_transfer (SV *prev_sv, SV *next_sv)
		887	{
		888	struct transfer_args ta;
		889
		890	prepare_transfer (&ta, prev_sv, next_sv);
		891	TRANSFER (ta);
		892	}
		893
774	static void	894	static int
775	api_transfer(pTHX_ SV *prev, SV *next, int flags)	895	api_save (SV *coro_sv, int new_save)
776	{	896	{
777	transfer(aTHX_	897	struct coro *coro = SvSTATE (coro_sv);
778	sv_to_coro (prev, "Coro::transfer", "prev"),	898	int old_save = coro->save;
779	sv_to_coro (next, "Coro::transfer", "next"),	899
780	flags);	900	if (new_save >= 0)
		901	coro->save = new_save;
		902
		903	return old_save;
781	}	904	}
782		905
783	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
784		907
785	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
788	#define PRIO_LOW -1	911	#define PRIO_LOW -1
789	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
790	#define PRIO_MIN -4	913	#define PRIO_MIN -4
791		914
792	/* for Coro.pm */	915	/* for Coro.pm */
793	static GV *coro_current, *coro_idle;	916	static SV *coro_current;
794	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
795	static int coro_nready;	918	static int coro_nready;
796		919
797	static void	920	static void
798	coro_enq (SV *sv)	921	coro_enq (SV *coro_sv)
799	{	922	{
800	if (SvROK (sv))	923	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
801	{
802	SV *hv = SvRV (sv);
803	if (SvTYPE (hv) == SVt_PVHV)
804	{
805	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
806	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808	prio = prio > PRIO_MAX ? PRIO_MAX
809	: prio < PRIO_MIN ? PRIO_MIN
810	: prio;
811
812	av_push (coro_ready [prio - PRIO_MIN], sv);
813	coro_nready++;	924	coro_nready++;
814
815	return;
816	}
817	}
818
819	croak ("Coro::ready tried to enqueue something that is not a coroutine");
820	}	925	}
821		926
822	static SV *	927	static SV *
823	coro_deq (int min_prio)	928	coro_deq (int min_prio)
824	{	929	{
…		…
827	min_prio -= PRIO_MIN;	932	min_prio -= PRIO_MIN;
828	if (min_prio < 0)	933	if (min_prio < 0)
829	min_prio = 0;	934	min_prio = 0;
830		935
831	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	936	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
832	if (av_len (coro_ready[prio]) >= 0)	937	if (AvFILLp (coro_ready [prio]) >= 0)
833	{	938	{
834	coro_nready--;	939	coro_nready--;
835	return av_shift (coro_ready[prio]);	940	return av_shift (coro_ready [prio]);
836	}	941	}
837		942
838	return 0;	943	return 0;
839	}	944	}
840		945
841	static void	946	static int
842	api_ready (SV *coro)	947	api_ready (SV *coro_sv)
843	{	948	{
		949	struct coro *coro;
		950
		951	if (SvROK (coro_sv))
		952	coro_sv = SvRV (coro_sv);
		953
		954	coro = SvSTATE (coro_sv);
		955
		956	if (coro->flags & CF_READY)
		957	return 0;
		958
		959	#if 0 /* this is actually harmless */
		960	if (coro->flags & CF_RUNNING)
		961	croak ("Coro::ready called on currently running coroutine");
		962	#endif
		963
		964	coro->flags |= CF_READY;
		965
		966	LOCK;
844	coro_enq (SvREFCNT_inc (coro));	967	coro_enq (SvREFCNT_inc (coro_sv));
845	}	968	UNLOCK;
846		969
		970	return 1;
		971	}
		972
847	static void	973	static int
848	api_schedule (int cede)	974	api_is_ready (SV *coro_sv)
		975	{
		976	return !!SvSTATE (coro_sv)->flags & CF_READY;
		977	}
		978
		979	static void
		980	prepare_schedule (struct transfer_args *ta)
849	{	981	{
850	SV *prev, *next;	982	SV *prev, *next;
851		983
852	prev = GvSV (coro_current);	984	for (;;)
853		985	{
854	if (cede)	986	LOCK;
855	coro_enq (SvREFCNT_inc (prev));
856
857	next = coro_deq (PRIO_MIN);	987	next = coro_deq (PRIO_MIN);
		988	UNLOCK;
858		989
859	if (!next)	990	if (next)
860	next = SvREFCNT_inc (GvSV (coro_idle));	991	break;
861		992
862	GvSV (coro_current) = SvREFCNT_inc (next);	993	{
863	transfer (aTHX_	994	dSP;
864	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	995
865	sv_to_coro (next, "Coro::schedule", "next coroutine"),	996	ENTER;
866	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	997	SAVETMPS;
867	SvREFCNT_dec (next);	998
868	SvREFCNT_dec (prev);	999	PUSHMARK (SP);
		1000	PUTBACK;
		1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1002
		1003	FREETMPS;
		1004	LEAVE;
		1005	}
		1006	}
		1007
		1008	prev = SvRV (coro_current);
		1009	SvRV_set (coro_current, next);
		1010
		1011	/* free this only after the transfer */
		1012	LOCK;
		1013	free_coro_mortal ();
		1014	UNLOCK;
		1015	coro_mortal = prev;
		1016
		1017	assert (!SvROK(prev));//D
		1018	assert (!SvROK(next));//D
		1019
		1020	ta->prev = SvSTATE (prev);
		1021	ta->next = SvSTATE (next);
		1022
		1023	assert (ta->next->flags & CF_READY);
		1024	ta->next->flags &= ~CF_READY;
		1025	}
		1026
		1027	static void
		1028	prepare_cede (struct transfer_args *ta)
		1029	{
		1030	api_ready (coro_current);
		1031
		1032	prepare_schedule (ta);
		1033	}
		1034
		1035	static void
		1036	api_schedule (void)
		1037	{
		1038	struct transfer_args ta;
		1039
		1040	prepare_schedule (&ta);
		1041	TRANSFER (ta);
		1042	}
		1043
		1044	static void
		1045	api_cede (void)
		1046	{
		1047	struct transfer_args ta;
		1048
		1049	prepare_cede (&ta);
		1050	TRANSFER (ta);
869	}	1051	}
870		1052
871	MODULE = Coro::State PACKAGE = Coro::State	1053	MODULE = Coro::State PACKAGE = Coro::State
872		1054
873	PROTOTYPES: ENABLE	1055	PROTOTYPES: DISABLE
874		1056
875	BOOT:	1057	BOOT:
876	{ /* {} necessary for stoopid perl-5.6.x */	1058	{
877	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1059	#ifdef USE_ITHREADS
878	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1060	MUTEX_INIT (&coro_mutex);
		1061	#endif
		1062	BOOT_PAGESIZE;
		1063
879	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1064	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
880		1065
881	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1066	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
882	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1067	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
883	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1068	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1069	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
884	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1070	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
885
886	if (!padlist_cache)
887	padlist_cache = newHV ();
888		1071
889	main_mainstack = PL_mainstack;	1072	main_mainstack = PL_mainstack;
890		1073
891	coroapi.ver = CORO_API_VERSION;	1074	coroapi.ver = CORO_API_VERSION;
892	coroapi.transfer = api_transfer;	1075	coroapi.transfer = api_transfer;
893	}
894		1076
895	Coro::State	1077	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
896	_newprocess(args)	1078	}
897	SV * args	1079
898	PROTOTYPE: $	1080	SV *
		1081	new (char *klass, ...)
899	CODE:	1082	CODE:
900	Coro__State coro;	1083	{
		1084	struct coro *coro;
		1085	HV *hv;
		1086	int i;
901		1087
902	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
903	croak ("Coro::State::_newprocess expects an arrayref");
904
905	New (0, coro, 1, struct coro);	1088	Newz (0, coro, 1, struct coro);
		1089	coro->args = newAV ();
		1090	coro->save = CORO_SAVE_ALL;
		1091	coro->flags = CF_NEW;
906		1092
907	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1093	hv = newHV ();
908	coro->mainstack = 0; /* actual work is done inside transfer */	1094	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
909	coro->stack = 0;	1095	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
910		1096
911	RETVAL = coro;	1097	for (i = 1; i < items; i++)
		1098	av_push (coro->args, newSVsv (ST (i)));
		1099	}
912	OUTPUT:	1100	OUTPUT:
913	RETVAL	1101	RETVAL
914		1102
		1103	int
		1104	save (SV *coro, int new_save = -1)
		1105	CODE:
		1106	RETVAL = api_save (coro, new_save);
		1107	OUTPUT:
		1108	RETVAL
		1109
915	void	1110	void
916	transfer(prev, next, flags)	1111	_set_stacklevel (...)
917	Coro::State_or_hashref prev	1112	ALIAS:
918	Coro::State_or_hashref next	1113	Coro::State::transfer = 1
919	int flags	1114	Coro::schedule = 2
920	PROTOTYPE: @	1115	Coro::cede = 3
921	CODE:	1116	CODE:
922	PUTBACK;	1117	{
923	transfer (aTHX_ prev, next, flags);	1118	struct transfer_args ta;
924	SPAGAIN;	1119
		1120	switch (ix)
		1121	{
		1122	case 0:
		1123	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1124	ta.next = 0;
		1125	break;
		1126
		1127	case 1:
		1128	if (items != 2)
		1129	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1130
		1131	prepare_transfer (&ta, ST (0), ST (1));
		1132	break;
		1133
		1134	case 2:
		1135	prepare_schedule (&ta);
		1136	break;
		1137
		1138	case 3:
		1139	prepare_cede (&ta);
		1140	break;
		1141	}
		1142
		1143	TRANSFER (ta);
		1144	}
925		1145
926	void	1146	void
927	DESTROY(coro)	1147	_clone_state_from (SV *dst, SV *src)
928	Coro::State coro	1148	CODE:
929	CODE:	1149	{
		1150	struct coro *coro_src = SvSTATE (src);
930		1151
931	if (coro->mainstack && coro->mainstack != main_mainstack)	1152	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
932	{
933	struct coro temp;
934		1153
935	PUTBACK;	1154	++coro_src->refcnt;
936	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1155	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
937	LOAD(aTHX_ coro);	1156	}
938	SPAGAIN;
939
940	destroy_stacks (aTHX);
941
942	LOAD((&temp)); /* this will get rid of defsv etc.. */
943	SPAGAIN;
944
945	coro->mainstack = 0;
946	}
947
948	deallocate_stack (coro);
949
950	Safefree (coro);
951		1157
952	void	1158	void
953	flush()
954	CODE:
955	#ifdef MAY_FLUSH
956	flush_padlist_cache ();
957	#endif
958
959	void
960	_exit(code)	1159	_exit (code)
961	int code	1160	int code
962	PROTOTYPE: $	1161	PROTOTYPE: $
963	CODE:	1162	CODE:
964	#if defined(__GLIBC__) || _POSIX_C_SOURCE
965	_exit (code);	1163	_exit (code);
966	#else
967	signal (SIGTERM, SIG_DFL);
968	raise (SIGTERM);
969	exit (code);
970	#endif
971		1164
972	MODULE = Coro::State PACKAGE = Coro::Cont	1165	int
		1166	cctx_count ()
		1167	CODE:
		1168	RETVAL = cctx_count;
		1169	OUTPUT:
		1170	RETVAL
973		1171
974	# this is slightly dirty (should expose a c-level api)	1172	int
975		1173	cctx_idle ()
976	void	1174	CODE:
977	yield(...)	1175	RETVAL = cctx_idle;
978	PROTOTYPE: @	1176	OUTPUT:
979	CODE:	1177	RETVAL
980	static SV *returnstk;
981	SV *sv;
982	AV *defav = GvAV (PL_defgv);
983	struct coro *prev, *next;
984
985	if (!returnstk)
986	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
987
988	/* set up @_ -- ugly */
989	av_clear (defav);
990	av_fill (defav, items - 1);
991	while (items--)
992	av_store (defav, items, SvREFCNT_inc (ST(items)));
993
994	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
995	sv = av_pop ((AV *)SvRV (returnstk));
996	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
997	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
998	SvREFCNT_dec (sv);
999
1000	transfer(aTHX_ prev, next, 0);
1001		1178
1002	MODULE = Coro::State PACKAGE = Coro	1179	MODULE = Coro::State PACKAGE = Coro
1003		1180
1004	# this is slightly dirty (should expose a c-level api)
1005
1006	BOOT:	1181	BOOT:
1007	{	1182	{
1008	int i;	1183	int i;
		1184
1009	HV *stash = gv_stashpv ("Coro", TRUE);	1185	coro_stash = gv_stashpv ("Coro", TRUE);
1010		1186
1011	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1187	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1012	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1188	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1013	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1189	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1014	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1190	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1015	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1191	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1016	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1192	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1017		1193
1018	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1194	coro_current = get_sv ("Coro::current", FALSE);
1019	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1195	SvREADONLY_on (coro_current);
1020		1196
1021	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1197	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1022	coro_ready[i] = newAV ();	1198	coro_ready[i] = newAV ();
1023		1199
1024	{	1200	{
1025	SV *sv = perl_get_sv("Coro::API", 1);	1201	SV *sv = perl_get_sv("Coro::API", 1);
1026		1202
1027	coroapi.schedule = api_schedule;	1203	coroapi.schedule = api_schedule;
		1204	coroapi.save = api_save;
		1205	coroapi.cede = api_cede;
1028	coroapi.ready = api_ready;	1206	coroapi.ready = api_ready;
		1207	coroapi.is_ready = api_is_ready;
1029	coroapi.nready = &coro_nready;	1208	coroapi.nready = &coro_nready;
1030	coroapi.current = coro_current;	1209	coroapi.current = coro_current;
1031		1210
1032	GCoroAPI = &coroapi;	1211	GCoroAPI = &coroapi;
1033	sv_setiv(sv, (IV)&coroapi);	1212	sv_setiv (sv, (IV)&coroapi);
1034	SvREADONLY_on(sv);	1213	SvREADONLY_on (sv);
1035	}	1214	}
1036	}	1215	}
1037		1216
1038	void	1217	void
1039	ready(self)	1218	_set_current (SV *current)
1040	SV * self	1219	PROTOTYPE: $
1041	CODE:	1220	CODE:
1042	api_ready (self);	1221	SvREFCNT_dec (SvRV (coro_current));
		1222	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1043		1223
1044	int	1224	int
		1225	prio (Coro::State coro, int newprio = 0)
		1226	ALIAS:
		1227	nice = 1
		1228	CODE:
		1229	{
		1230	RETVAL = coro->prio;
		1231
		1232	if (items > 1)
		1233	{
		1234	if (ix)
		1235	newprio += coro->prio;
		1236
		1237	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1238	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1239
		1240	coro->prio = newprio;
		1241	}
		1242	}
		1243
		1244	SV *
		1245	ready (SV *self)
		1246	PROTOTYPE: $
		1247	CODE:
		1248	RETVAL = boolSV (api_ready (self));
		1249	OUTPUT:
		1250	RETVAL
		1251
		1252	SV *
		1253	is_ready (SV *self)
		1254	PROTOTYPE: $
		1255	CODE:
		1256	RETVAL = boolSV (api_is_ready (self));
		1257	OUTPUT:
		1258	RETVAL
		1259
		1260	int
1045	nready(...)	1261	nready (...)
1046	PROTOTYPE:	1262	PROTOTYPE:
1047	CODE:	1263	CODE:
1048	RETVAL = coro_nready;	1264	RETVAL = coro_nready;
1049	OUTPUT:	1265	OUTPUT:
1050	RETVAL	1266	RETVAL
1051		1267
		1268	MODULE = Coro::State PACKAGE = Coro::AIO
		1269
		1270	SV *
		1271	_get_state ()
		1272	CODE:
		1273	{
		1274	struct io_state *data;
		1275
		1276	RETVAL = newSV (sizeof (struct io_state));
		1277	data = (struct io_state *)SvPVX (RETVAL);
		1278	SvCUR_set (RETVAL, sizeof (struct io_state));
		1279	SvPOK_only (RETVAL);
		1280
		1281	data->errorno = errno;
		1282	data->laststype = PL_laststype;
		1283	data->laststatval = PL_laststatval;
		1284	data->statcache = PL_statcache;
		1285	}
		1286	OUTPUT:
		1287	RETVAL
		1288
1052	void	1289	void
1053	schedule(...)	1290	_set_state (char *data_)
1054	PROTOTYPE:	1291	PROTOTYPE: $
1055	ALIAS:
1056	cede = 1
1057	CODE:	1292	CODE:
1058	api_schedule (ix);	1293	{
		1294	struct io_state *data = (void *)data_;
1059		1295
		1296	errno = data->errorno;
		1297	PL_laststype = data->laststype;
		1298	PL_laststatval = data->laststatval;
		1299	PL_statcache = data->statcache;
		1300	}
		1301

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