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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.75 by root, Thu Oct 26 06:50:20 2006 UTC vs.
Revision 1.123 by root, Mon Dec 4 21:56:00 2006 UTC

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

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