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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.39 by root, Sun Nov 25 20:04:05 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_ANONYMOUS	57	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS 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 IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		84
33	#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))
34		92
35	#include "CoroAPI.h"	93	#include "CoroAPI.h"
36		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
37	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 */
38		116
39	/* 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 */
40	typedef struct {	121	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	122	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		123
45	coro_context cctx;	124	/* the stack */
46
47	void *sptr;	125	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	126	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		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 */
51	struct coro {	147	struct coro {
52	/* the optional C context */	148	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	149	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56
57	/* optionally saved, might be zero */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61	/* TODO: PL_pmop might be nice && effortless to save. */
62
63	/* saved global state not related to stacks */
64	U8 dowarn;
65	I32 in_eval;
66
67	/* the stacks and related info (callchain etc..) */
68	PERL_SI *curstackinfo;
69	AV *curstack;
70	AV *mainstack;
71	SV **stack_sp;
72	OP *op;
73	SV **curpad;
74	SV **stack_base;
75	SV **stack_max;
76	SV **tmps_stack;
77	I32 tmps_floor;
78	I32 tmps_ix;
79	I32 tmps_max;
80	I32 *markstack;
81	I32 *markstack_ptr;
82	I32 *markstack_max;
83	I32 *scopestack;
84	I32 scopestack_ix;
85	I32 scopestack_max;
86	ANY *savestack;
87	I32 savestack_ix;
88	I32 savestack_max;
89	OP **retstack;
90	I32 retstack_ix;
91	I32 retstack_max;
92	COP *curcop;
93	JMPENV *top_env;
94		150
95	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
96	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;
97	};	170	};
98		171
99	typedef struct coro *Coro__State;	172	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	173	typedef struct coro *Coro__State_or_hashref;
101		174
102	static AV *main_mainstack; /* used to differentiate between $main and others */	175	static AV *
103	static HV *coro_state_stash;	176	coro_clone_padlist (CV *cv)
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107	static SV *coro_mortal; /* will be freed after next transfer */
108
109	/* mostly copied from op.c:cv_clone2 */
110	STATIC AV *
111	clone_padlist (AV *protopadlist)
112	{	177	{
113	AV *av;	178	AV *padlist = CvPADLIST (cv);
114	I32 ix;
115	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV *newpadlist, *newpad_name, *newpad;	179	AV *newpadlist, *newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131		180
132	newpadlist = newAV ();	181	newpadlist = newAV ();
133	AvREAL_off (newpadlist);	182	AvREAL_off (newpadlist);
134	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)));
135	av_store (newpadlist, 1, (SV *) newpad);	192	av_store (newpadlist, 1, (SV *)newpad);
136		193
137	av = newAV (); /* will be @_ */	194	return newpadlist;
138	av_extend (av, 0);	195	}
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141		196
142	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))
143	{	202	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	203	I32 i = AvFILLp (padlist);
145	if (namesv && namesv != &PL_sv_undef)	204	while (i >= 0)
146	{	205	{
147	char *name = SvPVX (namesv); /* XXX */	206	SV **svp = av_fetch (padlist, i--, FALSE);
148	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	207	if (svp)
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}	208	{
152	else
153	{ /* our own lexical */
154	SV *sv;	209	SV *sv;
155	if (*name == '&')	210	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156	sv = SvREFCNT_inc (ppad[ix]);	211	SvREFCNT_dec (sv);
157	else if (*name == '@')	212
158	sv = (SV *) newAV ();	213	SvREFCNT_dec (*svp);
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}	214	}
167	}	215	}
168	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	216
169	{	217	SvREFCNT_dec ((SV*)padlist);
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}	218	}
		219	}
179		220
180	#if 0 /* return -ENOTUNDERSTOOD */	221	static int
181	/* 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;
182		226
183	for (ix = fpad; ix > 0; ix--) {	227	/* casting is fun. */
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	228	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
185	if (namesv	229	free_padlist (padlist);
186	&& namesv != &PL_sv_undef	230
187	&& !(SvFLAGS(namesv) & SVf_FAKE)	231	SvREFCNT_dec (av);
188	&& *SvPVX(namesv) == '&'	232
189	&& CvCLONE(ppad[ix]))	233	return 0;
190	{	234	}
191	CV *kid = cv_clone((CV*)ppad[ix]);	235
192	SvREFCNT_dec(ppad[ix]);	236	#define PERL_MAGIC_coro PERL_MAGIC_ext
193	CvCLONE_on(kid);	237
194	SvPADMY_on(kid);	238	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
195	npad[ix] = (SV*)kid;	239
196	}	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 ();
197	}	282	}
198	#endif
199		283
200	return newpadlist;	284	av = (AV *)mg->mg_obj;
201	}
202		285
203	#ifdef MAY_FLUSH	286	if (AvFILLp (av) >= AvMAX (av))
204	STATIC void	287	av_extend (av, AvMAX (av) + 1);
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV *sv = svp ? *svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218		288
219	SvREFCNT_dec((SV*)padlist);	289	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
220	}
221	}	290	}
222	#endif
223
224	/* the next two functions merely cache the padlists */
225	STATIC void
226	get_padlist (CV *cv)
227	{
228	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230	if (he && AvFILLp ((AV *)*he) >= 0)
231	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232	else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234	}
235
236	STATIC void
237	put_padlist (CV *cv)
238	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241	if (SvTYPE (*he) != SVt_PVAV)
242	{
243	SvREFCNT_dec (*he);
244	*he = (SV *)newAV ();
245	}
246
247	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248	}
249
250	#ifdef MAY_FLUSH
251	STATIC void
252	flush_padlist_cache ()
253	{
254	HV *hv = padlist_cache;
255	padlist_cache = newHV ();
256
257	if (hv_iterinit (hv))
258	{
259	HE *he;
260	AV *padlist;
261
262	while (!!(he = hv_iternext (hv)))
263	{
264	AV *av = (AV *)HeVAL(he);
265
266	/* casting is fun. */
267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268	free_padlist (padlist);
269	}
270	}
271
272	SvREFCNT_dec (hv);
273	}
274	#endif
275		291
276	#define SB do {	292	#define SB do {
277	#define SE } while (0)	293	#define SE } while (0)
278		294
279	#define LOAD(state) load_state(aTHX_ (state));
280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282	#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
283		296
284	static void	297	static void
285	load_state(pTHX_ Coro__State c)	298	load_perl (Coro__State c)
286	{	299	{
287	PL_dowarn = c->dowarn;	300	#define VAR(name,type) PL_ ## name = c->name;
288	PL_in_eval = c->in_eval;	301	# include "state.h"
289		302	#undef VAR
290	PL_curstackinfo = c->curstackinfo;
291	PL_curstack = c->curstack;
292	PL_mainstack = c->mainstack;
293	PL_stack_sp = c->stack_sp;
294	PL_op = c->op;
295	PL_curpad = c->curpad;
296	PL_stack_base = c->stack_base;
297	PL_stack_max = c->stack_max;
298	PL_tmps_stack = c->tmps_stack;
299	PL_tmps_floor = c->tmps_floor;
300	PL_tmps_ix = c->tmps_ix;
301	PL_tmps_max = c->tmps_max;
302	PL_markstack = c->markstack;
303	PL_markstack_ptr = c->markstack_ptr;
304	PL_markstack_max = c->markstack_max;
305	PL_scopestack = c->scopestack;
306	PL_scopestack_ix = c->scopestack_ix;
307	PL_scopestack_max = c->scopestack_max;
308	PL_savestack = c->savestack;
309	PL_savestack_ix = c->savestack_ix;
310	PL_savestack_max = c->savestack_max;
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	PL_curcop = c->curcop;
315	PL_top_env = c->top_env;
316		303
317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319	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	}
320		318
321	{	319	{
322	dSP;	320	dSP;
323	CV *cv;	321	CV *cv;
324		322
325	/* now do the ugly restore mess */	323	/* now do the ugly restore mess */
326	while ((cv = (CV *)POPs))	324	while ((cv = (CV *)POPs))
327	{	325	{
328	AV *padlist = (AV *)POPs;
329
330	if (padlist)
331	{
332	put_padlist (cv); /* mark this padlist as available */	326	put_padlist (cv); /* mark this padlist as available */
333	CvPADLIST(cv) = padlist;	327	CvDEPTH (cv) = PTR2IV (POPs);
334	#ifdef USE_THREADS	328	CvPADLIST (cv) = (AV *)POPs;
335	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336	#endif
337	}
338
339	++CvDEPTH(cv);
340	}	329	}
341		330
342	PUTBACK;	331	PUTBACK;
343	}	332	}
344	}	333	}
345		334
346	static void	335	static void
347	save_state(pTHX_ Coro__State c, int flags)	336	save_perl (Coro__State c)
348	{	337	{
349	{	338	{
350	dSP;	339	dSP;
351	I32 cxix = cxstack_ix;	340	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	341	PERL_CONTEXT *ccstk = cxstack;
…		…
363	{	352	{
364	while (cxix >= 0)	353	while (cxix >= 0)
365	{	354	{
366	PERL_CONTEXT *cx = &ccstk[cxix--];	355	PERL_CONTEXT *cx = &ccstk[cxix--];
367		356
368	if (CxTYPE(cx) == CXt_SUB)	357	if (CxTYPE (cx) == CXt_SUB)
369	{	358	{
370	CV *cv = cx->blk_sub.cv;	359	CV *cv = cx->blk_sub.cv;
		360
371	if (CvDEPTH(cv))	361	if (CvDEPTH (cv))
372	{	362	{
373	#ifdef USE_THREADS
374	/*XPUSHs ((SV *)CvOWNER(cv));*/
375	/*CvOWNER(cv) = 0;*/
376	/*error must unlock this cv etc.. etc...*/
377	#endif
378	EXTEND (SP, CvDEPTH(cv)*2);	363	EXTEND (SP, 3);
379		364
380	while (--CvDEPTH(cv))
381	{
382	/* this tells the restore code to increment CvDEPTH */
383	PUSHs (Nullsv);
384	PUSHs ((SV *)cv);
385	}
386
387	PUSHs ((SV *)CvPADLIST(cv));	365	PUSHs ((SV *)CvPADLIST (cv));
		366	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
388	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
389		368
		369	CvDEPTH (cv) = 0;
390	get_padlist (cv); /* this is a monster */	370	get_padlist (cv);
391	}	371	}
392	}	372	}
		373	#ifdef CXt_FORMAT
393	else if (CxTYPE(cx) == CXt_FORMAT)	374	else if (CxTYPE (cx) == CXt_FORMAT)
394	{	375	{
395	/* 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? */
396	/* my bold guess is as a simple, plain sub... */	377	/* my bold guess is as a simple, plain sub... */
397	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");
398	}	379	}
		380	#endif
399	}	381	}
400		382
401	if (top_si->si_type == PERLSI_MAIN)	383	if (top_si->si_type == PERLSI_MAIN)
402	break;	384	break;
403		385
…		…
407	}	389	}
408		390
409	PUTBACK;	391	PUTBACK;
410	}	392	}
411		393
412	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;
413	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	395	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
414	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;
415		398
416	c->dowarn = PL_dowarn;	399	#define VAR(name,type)c->name = PL_ ## name;
417	c->in_eval = PL_in_eval;	400	# include "state.h"
418		401	#undef VAR
419	c->curstackinfo = PL_curstackinfo;
420	c->curstack = PL_curstack;
421	c->mainstack = PL_mainstack;
422	c->stack_sp = PL_stack_sp;
423	c->op = PL_op;
424	c->curpad = PL_curpad;
425	c->stack_base = PL_stack_base;
426	c->stack_max = PL_stack_max;
427	c->tmps_stack = PL_tmps_stack;
428	c->tmps_floor = PL_tmps_floor;
429	c->tmps_ix = PL_tmps_ix;
430	c->tmps_max = PL_tmps_max;
431	c->markstack = PL_markstack;
432	c->markstack_ptr = PL_markstack_ptr;
433	c->markstack_max = PL_markstack_max;
434	c->scopestack = PL_scopestack;
435	c->scopestack_ix = PL_scopestack_ix;
436	c->scopestack_max = PL_scopestack_max;
437	c->savestack = PL_savestack;
438	c->savestack_ix = PL_savestack_ix;
439	c->savestack_max = PL_savestack_max;
440	c->retstack = PL_retstack;
441	c->retstack_ix = PL_retstack_ix;
442	c->retstack_max = PL_retstack_max;
443	c->curcop = PL_curcop;
444	c->top_env = PL_top_env;
445	}	402	}
446		403
447	/*	404	/*
448	* allocate various perl stacks. This is an exact copy	405	* allocate various perl stacks. This is an exact copy
449	* of perl.c:init_stacks, except that it uses less memory	406	* of perl.c:init_stacks, except that it uses less memory
450	* on the assumption that coroutines do not usually need	407	* on the (sometimes correct) assumption that coroutines do
451	* a lot of stackspace.	408	* not usually need a lot of stackspace.
452	*/	409	*/
453	STATIC void	410	static void
454	coro_init_stacks (pTHX)	411	coro_init_stacks ()
455	{	412	{
456	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	413	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
457	PL_curstackinfo->si_type = PERLSI_MAIN;	414	PL_curstackinfo->si_type = PERLSI_MAIN;
458	PL_curstack = PL_curstackinfo->si_stack;	415	PL_curstack = PL_curstackinfo->si_stack;
459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	416	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460		417
461	PL_stack_base = AvARRAY(PL_curstack);	418	PL_stack_base = AvARRAY(PL_curstack);
462	PL_stack_sp = PL_stack_base;	419	PL_stack_sp = PL_stack_base;
463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	420	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464		421
465	New(50,PL_tmps_stack,96,SV*);	422	New(50,PL_tmps_stack,128,SV*);
466	PL_tmps_floor = -1;	423	PL_tmps_floor = -1;
467	PL_tmps_ix = -1;	424	PL_tmps_ix = -1;
468	PL_tmps_max = 96;	425	PL_tmps_max = 128;
469		426
470	New(54,PL_markstack,16,I32);	427	New(54,PL_markstack,32,I32);
471	PL_markstack_ptr = PL_markstack;	428	PL_markstack_ptr = PL_markstack;
472	PL_markstack_max = PL_markstack + 16;	429	PL_markstack_max = PL_markstack + 32;
473		430
		431	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	432	SET_MARK_OFFSET;
		433	#endif
475		434
476	New(54,PL_scopestack,16,I32);	435	New(54,PL_scopestack,32,I32);
477	PL_scopestack_ix = 0;	436	PL_scopestack_ix = 0;
478	PL_scopestack_max = 16;	437	PL_scopestack_max = 32;
479		438
480	New(54,PL_savestack,96,ANY);	439	New(54,PL_savestack,64,ANY);
481	PL_savestack_ix = 0;	440	PL_savestack_ix = 0;
482	PL_savestack_max = 96;	441	PL_savestack_max = 64;
483		442
		443	#if !PERL_VERSION_ATLEAST (5,9,0)
484	New(54,PL_retstack,8,OP*);	444	New(54,PL_retstack,16,OP*);
485	PL_retstack_ix = 0;	445	PL_retstack_ix = 0;
486	PL_retstack_max = 8;	446	PL_retstack_max = 16;
		447	#endif
487	}	448	}
488		449
489	/*	450	/*
490	* destroy the stacks, the callchain etc...	451	* destroy the stacks, the callchain etc...
491	* still there is a memleak of 128 bytes...
492	*/	452	*/
493	STATIC void	453	static void
494	destroy_stacks(pTHX)	454	coro_destroy_stacks ()
495	{	455	{
496	if (!IN_DESTRUCT)	456	if (!IN_DESTRUCT)
497	{	457	{
498	/* is this ugly, I ask? */	458	/* is this ugly, I ask? */
499	while (PL_scopestack_ix)	459	LEAVE_SCOPE (0);
500	LEAVE;
501		460
502	/* sure it is, but more important: is it correct?? :/ */	461	/* sure it is, but more important: is it correct?? :/ */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;	462	FREETMPS;
		463
		464	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
505	}	465	}
506		466
507	while (PL_curstackinfo->si_next)	467	while (PL_curstackinfo->si_next)
508	PL_curstackinfo = PL_curstackinfo->si_next;	468	PL_curstackinfo = PL_curstackinfo->si_next;
509		469
510	while (PL_curstackinfo)	470	while (PL_curstackinfo)
511	{	471	{
512	PERL_SI *p = PL_curstackinfo->si_prev;	472	PERL_SI *p = PL_curstackinfo->si_prev;
513		473
514	{	474	{ /*D*//*remove*/
515	dSP;	475	dSP;
516	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	476	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
517	PUTBACK; /* possibly superfluous */	477	PUTBACK; /* possibly superfluous */
518	}	478	}
519		479
520	if (!IN_DESTRUCT)	480	if (!IN_DESTRUCT)
521	{	481	{
522	dounwind(-1);	482	dounwind (-1);/*D*//*remove*/
523	SvREFCNT_dec(PL_curstackinfo->si_stack);	483	SvREFCNT_dec (PL_curstackinfo->si_stack);
524	}	484	}
525		485
526	Safefree(PL_curstackinfo->si_cxstack);	486	Safefree (PL_curstackinfo->si_cxstack);
527	Safefree(PL_curstackinfo);	487	Safefree (PL_curstackinfo);
528	PL_curstackinfo = p;	488	PL_curstackinfo = p;
529	}	489	}
530		490
531	Safefree(PL_tmps_stack);	491	Safefree (PL_tmps_stack);
532	Safefree(PL_markstack);	492	Safefree (PL_markstack);
533	Safefree(PL_scopestack);	493	Safefree (PL_scopestack);
534	Safefree(PL_savestack);	494	Safefree (PL_savestack);
		495	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree(PL_retstack);	496	Safefree (PL_retstack);
536	}
537
538	static void
539	allocate_stack (Coro__State ctx, int alloc)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548	if (alloc)
549	{
550	#if HAVE_MMAP
551	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
553	if (stack->sptr == (void *)-1)
554	#endif	497	#endif
555	{
556	/*FIXME*//*D*//* reasonable stack size! */
557	stack->ssize = -4096 * sizeof (long);
558	New (0, stack->sptr, 4096, long);
559	}
560	}
561	else
562	stack->sptr = 0;
563
564	ctx->stack = stack;
565	}	498	}
566		499
567	static void	500	static void
568	deallocate_stack (Coro__State ctx)	501	setup_coro (struct coro *coro)
569	{
570	coro_stack *stack = ctx->stack;
571
572	ctx->stack = 0;
573
574	if (stack)
575	{
576	if (!--stack->refcnt)
577	{
578	#ifdef HAVE_MMAP
579	if (stack->ssize > 0 && stack->sptr)
580	munmap (stack->sptr, stack->ssize);
581	else
582	#else
583	Safefree (stack->sptr);
584	#endif
585	Safefree (stack);
586	}
587	else if (ctx->gencnt == stack->gencnt)
588	--stack->usecnt;
589	}
590	}
591
592	static void
593	setup_coro (void *arg)
594	{	502	{
595	/*	503	/*
596	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
597	*/	505	*/
598	dSP;
599	Coro__State ctx = (Coro__State)arg;
600	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601		506
602	coro_init_stacks (aTHX);	507	coro_init_stacks ();
603	/*PL_curcop = 0;*/	508
604	/*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
605	SvREFCNT_dec (GvAV (PL_defgv));	520	SvREFCNT_dec (GvAV (PL_defgv));
606	GvAV (PL_defgv) = ctx->args;	521	GvAV (PL_defgv) = coro->args; coro->args = 0;
607		522
608	SPAGAIN;
609
610	if (ctx->stack)
611	{
612	ctx->cursp = 0;
613
614	PUSHMARK(SP);
615	PUTBACK;
616	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
617
618	if (SvTRUE (ERRSV))
619	croak (NULL);
620	else
621	croak ("FATAL: CCTXT coroutine returned!");
622	}
623	else
624	{
625	UNOP myop;
626
627	PL_op = (OP *)&myop;
628
629	Zero(&myop, 1, UNOP);	523	Zero (&myop, 1, LOGOP);
630	myop.op_next = Nullop;	524	myop.op_next = Nullop;
631	myop.op_flags = OPf_WANT_VOID;	525	myop.op_flags = OPf_WANT_VOID;
632		526
633	PUSHMARK(SP);	527	PUSHMARK (SP);
634	XPUSHs (sub_init);	528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
635	/*
636	* the next line is slightly wrong, as PL_op->op_next
637	* is actually being executed so we skip the first op.
638	* that doesn't matter, though, since it is only
639	* pp_nextstate and we never return...
640	* ah yes, and I don't care anyways ;)
641	*/
642	PUTBACK;	529	PUTBACK;
643	PL_op = pp_entersub();	530	PL_op = (OP *)&myop;
		531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
644	SPAGAIN;	532	SPAGAIN;
		533	}
645		534
646	ENTER; /* necessary e.g. for dounwind */	535	ENTER; /* necessary e.g. for dounwind */
647	}
648	}	536	}
649		537
650	static void	538	static void
651	continue_coro (void *arg)	539	free_coro_mortal ()
652	{	540	{
653	/*
654	* this is a _very_ stripped down perl interpreter ;)
655	*/
656	Coro__State ctx = (Coro__State)arg;
657	JMPENV coro_start_env;
658
659	/* same as JMPENV_BOOTSTRAP */
660	Zero(&coro_start_env, 1, JMPENV);
661	coro_start_env.je_ret = -1;
662	coro_start_env.je_mustcatch = TRUE;
663	PL_top_env = &coro_start_env;
664
665	ctx->cursp = 0;
666	PL_op = PL_op->op_next;
667	CALLRUNOPS(aTHX);
668
669	abort ();
670	}
671
672	STATIC void
673	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
674	{
675	dSTACKLEVEL;
676	static struct coro *xnext;
677
678	if (prev != next)
679	{
680	xnext = next;
681
682	if (next->mainstack)
683	{
684	SAVE (prev, flags);
685	LOAD (next);
686
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	/* don't add any code here */
715	}
716
717	}
718	else if (next->tmps_ix == -2)
719	croak ("tried to transfer to running coroutine");
720	else
721	{
722	SAVE (prev, -1); /* first get rid of the old state */
723
724	if (flags & TRANSFER_SAVE_CCTXT)
725	{
726	if (!prev->stack)
727	allocate_stack (prev, 0);
728
729	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
730	{
731	setup_coro (next);
732
733	prev->stack->refcnt++;
734	prev->stack->usecnt++;
735	next->stack = prev->stack;
736	next->gencnt = prev->gencnt;
737	}
738	else
739	{
740	allocate_stack (next, 1);
741	coro_create (&(next->stack->cctx),
742	setup_coro, (void *)next,
743	next->stack->sptr, labs (next->stack->ssize));
744	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
745	/* don't add any code here */
746	}
747	}
748	else
749	setup_coro (next);
750	}
751
752	/*
753	* xnext is now either prev or next, depending on wether
754	* we switched the c stack or not. that's why i use a global
755	* variable, that should become thread-specific at one point.
756	*/
757	xnext->cursp = stacklevel;
758	}
759
760	if (coro_mortal)	541	if (coro_mortal)
761	{	542	{
762	SvREFCNT_dec (coro_mortal);	543	SvREFCNT_dec (coro_mortal);
763	coro_mortal = 0;	544	coro_mortal = 0;
764	}	545	}
765	}	546	}
766		547
767	#define SV_CORO(sv,func) \	548	/* inject a fake call to Coro::State::_cctx_init into the execution */
768	do { \	549	static void NOINLINE
769	if (SvROK (sv)) \	550	prepare_cctx (coro_cctx *cctx)
770	sv = SvRV (sv); \	551	{
771	\	552	dSP;
772	if (SvTYPE(sv) == SVt_PVHV) \	553	LOGOP myop;
773	{ \
774	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
775	\
776	if (!he) \
777	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
778	\
779	(sv) = SvRV (HeVAL(he)); \
780	} \
781	\
782	/* must also be changed inside Coro::Cont::yield */ \
783	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
784	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
785	\
786	} while(0)
787		554
788	#define SvSTATE(sv) (struct coro *)SvIV (sv)	555	Zero (&myop, 1, LOGOP);
		556	myop.op_next = PL_op;
		557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
789		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. */
		573	UNLOCK;
		574
		575	/*
		576	* this is a _very_ stripped down perl interpreter ;)
		577	*/
		578	PL_top_env = &PL_start_env;
		579
		580	/* inject call to cctx_init */
		581	prepare_cctx ((coro_cctx *)arg);
		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
790	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
791	api_transfer(pTHX_ SV *prev, SV *next, int flags)	886	api_transfer (SV *prev_sv, SV *next_sv)
792	{	887	{
793	SV_CORO (prev, "Coro::transfer");	888	struct transfer_args ta;
794	SV_CORO (next, "Coro::transfer");
795		889
796	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;
797	}	904	}
798		905
799	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
800		907
801	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
804	#define PRIO_LOW -1	911	#define PRIO_LOW -1
805	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
806	#define PRIO_MIN -4	913	#define PRIO_MIN -4
807		914
808	/* for Coro.pm */	915	/* for Coro.pm */
809	static GV *coro_current, *coro_idle;	916	static SV *coro_current;
810	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
811	static int coro_nready;	918	static int coro_nready;
812		919
813	static void	920	static void
814	coro_enq (SV *sv)	921	coro_enq (SV *coro_sv)
815	{	922	{
816	if (SvTYPE (sv) == SVt_PVHV)
817	{
818	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
819	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
820
821	prio = prio > PRIO_MAX ? PRIO_MAX
822	: prio < PRIO_MIN ? PRIO_MIN
823	: prio;
824
825	av_push (coro_ready [prio - PRIO_MIN], sv);	923	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
826	coro_nready++;	924	coro_nready++;
827
828	return;
829	}
830
831	croak ("Coro::ready tried to enqueue something that is not a coroutine");
832	}	925	}
833		926
834	static SV *	927	static SV *
835	coro_deq (int min_prio)	928	coro_deq (int min_prio)
836	{	929	{
…		…
839	min_prio -= PRIO_MIN;	932	min_prio -= PRIO_MIN;
840	if (min_prio < 0)	933	if (min_prio < 0)
841	min_prio = 0;	934	min_prio = 0;
842		935
843	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	936	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
844	if (av_len (coro_ready[prio]) >= 0)	937	if (AvFILLp (coro_ready [prio]) >= 0)
845	{	938	{
846	coro_nready--;	939	coro_nready--;
847	return av_shift (coro_ready[prio]);	940	return av_shift (coro_ready [prio]);
848	}	941	}
849		942
850	return 0;	943	return 0;
851	}	944	}
852		945
853	static void	946	static int
854	api_ready (SV *coro)	947	api_ready (SV *coro_sv)
855	{	948	{
		949	struct coro *coro;
		950
856	if (SvROK (coro))	951	if (SvROK (coro_sv))
857	coro = SvRV (coro);	952	coro_sv = SvRV (coro_sv);
858		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;
859	coro_enq (SvREFCNT_inc (coro));	967	coro_enq (SvREFCNT_inc (coro_sv));
		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);
860	}	1033	}
861		1034
862	static void	1035	static void
863	api_schedule (void)	1036	api_schedule (void)
864	{	1037	{
865	SV *prev, *next;	1038	struct transfer_args ta;
866		1039
867	prev = SvRV (GvSV (coro_current));	1040	prepare_schedule (&ta);
868	next = coro_deq (PRIO_MIN);	1041	TRANSFER (ta);
869
870	if (!next)
871	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
872
873	coro_mortal = prev;
874	SV_CORO (prev, "Coro::schedule");
875
876	SvRV (GvSV (coro_current)) = next;
877
878	SV_CORO (next, "Coro::schedule");
879
880	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
881	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
882	}	1042	}
883		1043
884	static void	1044	static void
885	api_cede (void)	1045	api_cede (void)
886	{	1046	{
887	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1047	struct transfer_args ta;
888		1048
889	api_schedule ();	1049	prepare_cede (&ta);
		1050	TRANSFER (ta);
890	}	1051	}
891		1052
892	MODULE = Coro::State PACKAGE = Coro::State	1053	MODULE = Coro::State PACKAGE = Coro::State
893		1054
894	PROTOTYPES: ENABLE	1055	PROTOTYPES: DISABLE
895		1056
896	BOOT:	1057	BOOT:
897	{ /* {} necessary for stoopid perl-5.6.x */	1058	{
898	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1059	#ifdef USE_ITHREADS
899	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1060	MUTEX_INIT (&coro_mutex);
		1061	#endif
		1062	BOOT_PAGESIZE;
		1063
900	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1064	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
901		1065
902	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1066	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
903	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1067	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
904	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));
905	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1070	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
906
907	if (!padlist_cache)
908	padlist_cache = newHV ();
909		1071
910	main_mainstack = PL_mainstack;	1072	main_mainstack = PL_mainstack;
911		1073
912	coroapi.ver = CORO_API_VERSION;	1074	coroapi.ver = CORO_API_VERSION;
913	coroapi.transfer = api_transfer;	1075	coroapi.transfer = api_transfer;
914	}
915		1076
916	Coro::State	1077	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
917	_newprocess(args)	1078	}
918	SV * args	1079
919	PROTOTYPE: $	1080	SV *
		1081	new (char *klass, ...)
920	CODE:	1082	CODE:
921	Coro__State coro;	1083	{
		1084	struct coro *coro;
		1085	HV *hv;
		1086	int i;
922		1087
923	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
924	croak ("Coro::State::_newprocess expects an arrayref");
925
926	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;
927		1092
928	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1093	hv = newHV ();
929	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;
930	coro->stack = 0;	1095	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
931		1096
932	RETVAL = coro;	1097	for (i = 1; i < items; i++)
		1098	av_push (coro->args, newSVsv (ST (i)));
		1099	}
933	OUTPUT:	1100	OUTPUT:
934	RETVAL	1101	RETVAL
935		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
936	void	1110	void
937	transfer(prev, next, flags)	1111	_set_stacklevel (...)
938	SV *prev	1112	ALIAS:
939	SV *next	1113	Coro::State::transfer = 1
940	int flags	1114	Coro::schedule = 2
941	PROTOTYPE: @	1115	Coro::cede = 3
942	CODE:	1116	CODE:
943	PUTBACK;	1117	{
944	SV_CORO (next, "Coro::transfer");	1118	struct transfer_args ta;
945	SV_CORO (prev, "Coro::transfer");	1119
946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1120	switch (ix)
947	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	}
948		1145
949	void	1146	void
950	DESTROY(coro)	1147	_clone_state_from (SV *dst, SV *src)
951	Coro::State coro	1148	CODE:
952	CODE:	1149	{
		1150	struct coro *coro_src = SvSTATE (src);
953		1151
954	if (coro->mainstack && coro->mainstack != main_mainstack)	1152	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
955	{
956	struct coro temp;
957		1153
958	PUTBACK;	1154	++coro_src->refcnt;
959	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;
960	LOAD(aTHX_ coro);	1156	}
961	SPAGAIN;
962
963	destroy_stacks (aTHX);
964
965	LOAD((&temp)); /* this will get rid of defsv etc.. */
966	SPAGAIN;
967
968	coro->mainstack = 0;
969	}
970
971	deallocate_stack (coro);
972
973	Safefree (coro);
974		1157
975	void	1158	void
976	flush()
977	CODE:
978	#ifdef MAY_FLUSH
979	flush_padlist_cache ();
980	#endif
981
982	void
983	_exit(code)	1159	_exit (code)
984	int code	1160	int code
985	PROTOTYPE: $	1161	PROTOTYPE: $
986	CODE:	1162	CODE:
987	#if defined(__GLIBC__) || _POSIX_C_SOURCE
988	_exit (code);	1163	_exit (code);
989	#else
990	signal (SIGTERM, SIG_DFL);
991	raise (SIGTERM);
992	exit (code);
993	#endif
994		1164
995	MODULE = Coro::State PACKAGE = Coro::Cont	1165	int
		1166	cctx_count ()
		1167	CODE:
		1168	RETVAL = cctx_count;
		1169	OUTPUT:
		1170	RETVAL
996		1171
997	# this is slightly dirty (should expose a c-level api)	1172	int
998		1173	cctx_idle ()
999	void	1174	CODE:
1000	yield(...)	1175	RETVAL = cctx_idle;
1001	PROTOTYPE: @	1176	OUTPUT:
1002	CODE:	1177	RETVAL
1003	static SV *returnstk;
1004	SV *sv;
1005	AV *defav = GvAV (PL_defgv);
1006	struct coro *prev, *next;
1007
1008	if (!returnstk)
1009	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1010
1011	/* set up @_ -- ugly */
1012	av_clear (defav);
1013	av_fill (defav, items - 1);
1014	while (items--)
1015	av_store (defav, items, SvREFCNT_inc (ST(items)));
1016
1017	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1018	sv = av_pop ((AV *)SvRV (returnstk));
1019	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1020	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1021	SvREFCNT_dec (sv);
1022
1023	transfer(aTHX_ prev, next, 0);
1024		1178
1025	MODULE = Coro::State PACKAGE = Coro	1179	MODULE = Coro::State PACKAGE = Coro
1026		1180
1027	# this is slightly dirty (should expose a c-level api)
1028
1029	BOOT:	1181	BOOT:
1030	{	1182	{
1031	int i;	1183	int i;
		1184
1032	HV *stash = gv_stashpv ("Coro", TRUE);	1185	coro_stash = gv_stashpv ("Coro", TRUE);
1033		1186
1034	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1187	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1035	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1188	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1036	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1189	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1037	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1190	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1038	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1191	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1039	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1192	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1040		1193
1041	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1194	coro_current = get_sv ("Coro::current", FALSE);
1042	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1195	SvREADONLY_on (coro_current);
1043		1196
1044	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1197	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1045	coro_ready[i] = newAV ();	1198	coro_ready[i] = newAV ();
1046		1199
1047	{	1200	{
1048	SV *sv = perl_get_sv("Coro::API", 1);	1201	SV *sv = perl_get_sv("Coro::API", 1);
1049		1202
1050	coroapi.schedule = api_schedule;	1203	coroapi.schedule = api_schedule;
		1204	coroapi.save = api_save;
1051	coroapi.cede = api_cede;	1205	coroapi.cede = api_cede;
1052	coroapi.ready = api_ready;	1206	coroapi.ready = api_ready;
		1207	coroapi.is_ready = api_is_ready;
1053	coroapi.nready = &coro_nready;	1208	coroapi.nready = &coro_nready;
1054	coroapi.current = coro_current;	1209	coroapi.current = coro_current;
1055		1210
1056	GCoroAPI = &coroapi;	1211	GCoroAPI = &coroapi;
1057	sv_setiv(sv, (IV)&coroapi);	1212	sv_setiv (sv, (IV)&coroapi);
1058	SvREADONLY_on(sv);	1213	SvREADONLY_on (sv);
1059	}	1214	}
1060	}	1215	}
1061		1216
1062	void	1217	void
1063	ready(self)	1218	_set_current (SV *current)
1064	SV * self
1065	PROTOTYPE: $	1219	PROTOTYPE: $
1066	CODE:	1220	CODE:
1067	api_ready (self);	1221	SvREFCNT_dec (SvRV (coro_current));
		1222	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1068		1223
1069	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
1070	nready(...)	1261	nready (...)
1071	PROTOTYPE:	1262	PROTOTYPE:
1072	CODE:	1263	CODE:
1073	RETVAL = coro_nready;	1264	RETVAL = coro_nready;
1074	OUTPUT:	1265	OUTPUT:
1075	RETVAL	1266	RETVAL
1076		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
1077	void	1289	void
1078	schedule(...)	1290	_set_state (char *data_)
1079	PROTOTYPE:	1291	PROTOTYPE: $
1080	CODE:	1292	CODE:
1081	api_schedule ();	1293	{
		1294	struct io_state *data = (void *)data_;
1082		1295
1083	void	1296	errno = data->errorno;
1084	cede(...)	1297	PL_laststype = data->laststype;
1085	PROTOTYPE:	1298	PL_laststatval = data->laststatval;
1086	CODE:	1299	PL_statcache = data->statcache;
1087	api_cede ();	1300	}
1088		1301

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