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Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 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 "patchlevel.h"	7	#include "patchlevel.h"
6		8
7	#if PATCHLEVEL < 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)
8	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
10	# endif	25	# endif
11	# ifndef call_sv	26	# ifndef call_sv
12	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
25	# endif	40	# endif
26	#endif	41	#endif
27		42
28	#include "libcoro/coro.c"
29
30	#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
31		53
32	#ifdef HAVE_MMAP	54	#ifdef HAVE_MMAP
33	# include <unistd.h>	55	# include <unistd.h>
34	# include <sys/mman.h>	56	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	57	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	59	# define MAP_ANONYMOUS MAP_ANON
38	# else	60	# else
39	# undef HAVE_MMAP	61	# undef HAVE_MMAP
40	# endif	62	# endif
41	# 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
42	#endif	71	# endif
43		72	#else
44	#define MAY_FLUSH /* increases codesize and is rarely used */	73	# define PAGESIZE 0
45		74	# define BOOT_PAGESIZE (void)0
46	#define SUB_INIT "Coro::State::initialize"	75	#endif
47	#define UCORO_STATE "_coro_state"
48		76
49	/* 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
50	* 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
51	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
53		82
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		84
56	#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))
57		92
58	#include "CoroAPI.h"	93	#include "CoroAPI.h"
59		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
60	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 */
61		116
62	/* 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 */
63	typedef struct {	121	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	122	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		123
68	coro_context cctx;	124	/* the stack */
69
70	void *sptr;	125	void *sptr;
71	long ssize; /* positive == mmap, otherwise malloc */	126	long ssize; /* positive == mmap, otherwise malloc */
72	} coro_stack;
73		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 */
74	struct coro {	147	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	148	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	149	coro_cctx *cctx;
77
78	/* the optional C context */
79	coro_stack *stack;
80	void *cursp;
81	int gencnt;
82
83	/* optionally saved, might be zero */
84	AV *defav;
85	SV *defsv;
86	SV *errsv;
87
88	/* saved global state not related to stacks */
89	U8 dowarn;
90	I32 in_eval;
91
92	/* the stacks and related info (callchain etc..) */
93	PERL_SI *curstackinfo;
94	AV *curstack;
95	AV *mainstack;
96	SV **stack_sp;
97	OP *op;
98	SV **curpad;
99	AV *comppad;
100	SV **stack_base;
101	SV **stack_max;
102	SV **tmps_stack;
103	I32 tmps_floor;
104	I32 tmps_ix;
105	I32 tmps_max;
106	I32 *markstack;
107	I32 *markstack_ptr;
108	I32 *markstack_max;
109	I32 *scopestack;
110	I32 scopestack_ix;
111	I32 scopestack_max;
112	ANY *savestack;
113	I32 savestack_ix;
114	I32 savestack_max;
115	OP **retstack;
116	I32 retstack_ix;
117	I32 retstack_max;
118	COP *curcop;
119	JMPENV *top_env;
120		150
121	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
122	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;
123	};	170	};
124		171
125	typedef struct coro *Coro__State;	172	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	173	typedef struct coro *Coro__State_or_hashref;
127		174
128	static AV *main_mainstack; /* used to differentiate between $main and others */	175	static AV *
129	static HV *coro_state_stash;	176	coro_clone_padlist (CV *cv)
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV *coro_mortal; /* will be freed after next transfer */
134
135	/* mostly copied from op.c:cv_clone2 */
136	STATIC AV *
137	clone_padlist (AV *protopadlist)
138	{	177	{
139	AV *av;	178	AV *padlist = CvPADLIST (cv);
140	I32 ix;
141	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
142	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV *newpadlist, *newpad_name, *newpad;	179	AV *newpadlist, *newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157		180
158	newpadlist = newAV ();	181	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	182	AvREAL_off (newpadlist);
160	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)));
161	av_store (newpadlist, 1, (SV *) newpad);	192	av_store (newpadlist, 1, (SV *)newpad);
162		193
163	av = newAV (); /* will be @_ */	194	return newpadlist;
164	av_extend (av, 0);	195	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		196
168	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))
169	{	202	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	203	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	204	while (i >= 0)
172	{	205	{
173	char *name = SvPVX (namesv); /* XXX */	206	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	207	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	208	{
178	else
179	{ /* our own lexical */
180	SV *sv;	209	SV *sv;
181	if (*name == '&')	210	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	211	SvREFCNT_dec (sv);
183	else if (*name == '@')	212
184	sv = (SV *) newAV ();	213	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	if (!SvPADBUSY (sv))
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}	214	}
193	}	215	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	216
195	{	217	SvREFCNT_dec ((SV*)padlist);
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}	218	}
		219	}
205		220
206	#if 0 /* return -ENOTUNDERSTOOD */	221	static int
207	/* 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;
208		226
209	for (ix = fpad; ix > 0; ix--) {	227	/* casting is fun. */
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	228	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	if (namesv	229	free_padlist (padlist);
212	&& namesv != &PL_sv_undef	230
213	&& !(SvFLAGS(namesv) & SVf_FAKE)	231	SvREFCNT_dec (av);
214	&& *SvPVX(namesv) == '&'	232
215	&& CvCLONE(ppad[ix]))	233	return 0;
216	{	234	}
217	CV *kid = cv_clone((CV*)ppad[ix]);	235
218	SvREFCNT_dec(ppad[ix]);	236	#define PERL_MAGIC_coro PERL_MAGIC_ext
219	CvCLONE_on(kid);	237
220	SvPADMY_on(kid);	238	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221	npad[ix] = (SV*)kid;	239
222	}	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 ();
223	}	282	}
224	#endif
225		283
226	return newpadlist;	284	av = (AV *)mg->mg_obj;
227	}
228		285
229	#ifdef MAY_FLUSH	286	if (AvFILLp (av) >= AvMAX (av))
230	STATIC void	287	av_extend (av, AvMAX (av) + 1);
231	free_padlist (AV *padlist)
232	{
233	/* may be during global destruction */
234	if (SvREFCNT(padlist))
235	{
236	I32 i = AvFILLp(padlist);
237	while (i >= 0)
238	{
239	SV **svp = av_fetch(padlist, i--, FALSE);
240	SV *sv = svp ? *svp : Nullsv;
241	if (sv)
242	SvREFCNT_dec(sv);
243	}
244		288
245	SvREFCNT_dec((SV*)padlist);	289	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
246	}
247	}	290	}
248	#endif
249
250	/* the next two functions merely cache the padlists */
251	STATIC void
252	get_padlist (CV *cv)
253	{
254	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
255
256	if (he && AvFILLp ((AV *)*he) >= 0)
257	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
258	else
259	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
260	}
261
262	STATIC void
263	put_padlist (CV *cv)
264	{
265	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
266
267	if (SvTYPE (*he) != SVt_PVAV)
268	{
269	SvREFCNT_dec (*he);
270	*he = (SV *)newAV ();
271	}
272
273	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
274	}
275
276	#ifdef MAY_FLUSH
277	STATIC void
278	flush_padlist_cache ()
279	{
280	HV *hv = padlist_cache;
281	padlist_cache = newHV ();
282
283	if (hv_iterinit (hv))
284	{
285	HE *he;
286	AV *padlist;
287
288	while (!!(he = hv_iternext (hv)))
289	{
290	AV *av = (AV *)HeVAL(he);
291
292	/* casting is fun. */
293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294	free_padlist (padlist);
295	}
296	}
297
298	SvREFCNT_dec (hv);
299	}
300	#endif
301		291
302	#define SB do {	292	#define SB do {
303	#define SE } while (0)	293	#define SE } while (0)
304		294
305	#define LOAD(state) load_state(aTHX_ (state));
306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
307
308	#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
309		296
310	static void	297	static void
311	load_state(pTHX_ Coro__State c)	298	load_perl (Coro__State c)
312	{	299	{
313	PL_dowarn = c->dowarn;	300	#define VAR(name,type) PL_ ## name = c->name;
314	PL_in_eval = c->in_eval;	301	# include "state.h"
315		302	#undef VAR
316	PL_curstackinfo = c->curstackinfo;
317	PL_curstack = c->curstack;
318	PL_mainstack = c->mainstack;
319	PL_stack_sp = c->stack_sp;
320	PL_op = c->op;
321	PL_curpad = c->curpad;
322	PL_comppad = c->comppad;
323	PL_stack_base = c->stack_base;
324	PL_stack_max = c->stack_max;
325	PL_tmps_stack = c->tmps_stack;
326	PL_tmps_floor = c->tmps_floor;
327	PL_tmps_ix = c->tmps_ix;
328	PL_tmps_max = c->tmps_max;
329	PL_markstack = c->markstack;
330	PL_markstack_ptr = c->markstack_ptr;
331	PL_markstack_max = c->markstack_max;
332	PL_scopestack = c->scopestack;
333	PL_scopestack_ix = c->scopestack_ix;
334	PL_scopestack_max = c->scopestack_max;
335	PL_savestack = c->savestack;
336	PL_savestack_ix = c->savestack_ix;
337	PL_savestack_max = c->savestack_max;
338	PL_retstack = c->retstack;
339	PL_retstack_ix = c->retstack_ix;
340	PL_retstack_max = c->retstack_max;
341	PL_curcop = c->curcop;
342	PL_top_env = c->top_env;
343		303
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	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	}
347		318
348	{	319	{
349	dSP;	320	dSP;
350	CV *cv;	321	CV *cv;
351		322
352	/* now do the ugly restore mess */	323	/* now do the ugly restore mess */
353	while ((cv = (CV *)POPs))	324	while ((cv = (CV *)POPs))
354	{	325	{
355	AV *padlist = (AV *)POPs;
356
357	if (padlist)
358	{
359	put_padlist (cv); /* mark this padlist as available */	326	put_padlist (cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;	327	CvDEPTH (cv) = PTR2IV (POPs);
361	#ifdef USE_THREADS	328	CvPADLIST (cv) = (AV *)POPs;
362	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
363	#endif
364	}
365
366	++CvDEPTH(cv);
367	}	329	}
368		330
369	PUTBACK;	331	PUTBACK;
370	}	332	}
371	}	333	}
372		334
373	static void	335	static void
374	save_state(pTHX_ Coro__State c, int flags)	336	save_perl (Coro__State c)
375	{	337	{
376	{	338	{
377	dSP;	339	dSP;
378	I32 cxix = cxstack_ix;	340	I32 cxix = cxstack_ix;
379	PERL_CONTEXT *ccstk = cxstack;	341	PERL_CONTEXT *ccstk = cxstack;
…		…
390	{	352	{
391	while (cxix >= 0)	353	while (cxix >= 0)
392	{	354	{
393	PERL_CONTEXT *cx = &ccstk[cxix--];	355	PERL_CONTEXT *cx = &ccstk[cxix--];
394		356
395	if (CxTYPE(cx) == CXt_SUB)	357	if (CxTYPE (cx) == CXt_SUB)
396	{	358	{
397	CV *cv = cx->blk_sub.cv;	359	CV *cv = cx->blk_sub.cv;
		360
398	if (CvDEPTH(cv))	361	if (CvDEPTH (cv))
399	{	362	{
400	#ifdef USE_THREADS
401	/*XPUSHs ((SV *)CvOWNER(cv));*/
402	/*CvOWNER(cv) = 0;*/
403	/*error must unlock this cv etc.. etc...*/
404	#endif
405	EXTEND (SP, CvDEPTH(cv)*2);	363	EXTEND (SP, 3);
406		364
407	while (--CvDEPTH(cv))
408	{
409	/* this tells the restore code to increment CvDEPTH */
410	PUSHs (Nullsv);
411	PUSHs ((SV *)cv);
412	}
413
414	PUSHs ((SV *)CvPADLIST(cv));	365	PUSHs ((SV *)CvPADLIST (cv));
		366	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
415	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
416		368
		369	CvDEPTH (cv) = 0;
417	get_padlist (cv); /* this is a monster */	370	get_padlist (cv);
418	}	371	}
419	}	372	}
420	#ifdef CXt_FORMAT	373	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)	374	else if (CxTYPE (cx) == CXt_FORMAT)
422	{	375	{
423	/* 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? */
424	/* my bold guess is as a simple, plain sub... */	377	/* my bold guess is as a simple, plain sub... */
425	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");
426	}	379	}
…		…
436	}	389	}
437		390
438	PUTBACK;	391	PUTBACK;
439	}	392	}
440		393
441	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;
442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	395	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
443	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;
444		398
445	c->dowarn = PL_dowarn;	399	#define VAR(name,type)c->name = PL_ ## name;
446	c->in_eval = PL_in_eval;	400	# include "state.h"
447		401	#undef VAR
448	c->curstackinfo = PL_curstackinfo;
449	c->curstack = PL_curstack;
450	c->mainstack = PL_mainstack;
451	c->stack_sp = PL_stack_sp;
452	c->op = PL_op;
453	c->curpad = PL_curpad;
454	c->comppad = PL_comppad;
455	c->stack_base = PL_stack_base;
456	c->stack_max = PL_stack_max;
457	c->tmps_stack = PL_tmps_stack;
458	c->tmps_floor = PL_tmps_floor;
459	c->tmps_ix = PL_tmps_ix;
460	c->tmps_max = PL_tmps_max;
461	c->markstack = PL_markstack;
462	c->markstack_ptr = PL_markstack_ptr;
463	c->markstack_max = PL_markstack_max;
464	c->scopestack = PL_scopestack;
465	c->scopestack_ix = PL_scopestack_ix;
466	c->scopestack_max = PL_scopestack_max;
467	c->savestack = PL_savestack;
468	c->savestack_ix = PL_savestack_ix;
469	c->savestack_max = PL_savestack_max;
470	c->retstack = PL_retstack;
471	c->retstack_ix = PL_retstack_ix;
472	c->retstack_max = PL_retstack_max;
473	c->curcop = PL_curcop;
474	c->top_env = PL_top_env;
475	}	402	}
476		403
477	/*	404	/*
478	* allocate various perl stacks. This is an exact copy	405	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory	406	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need	407	* on the (sometimes correct) assumption that coroutines do
481	* a lot of stackspace.	408	* not usually need a lot of stackspace.
482	*/	409	*/
483	STATIC void	410	static void
484	coro_init_stacks (pTHX)	411	coro_init_stacks ()
485	{	412	{
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	413	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
487	PL_curstackinfo->si_type = PERLSI_MAIN;	414	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	415	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	416	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		417
491	PL_stack_base = AvARRAY(PL_curstack);	418	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	419	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	420	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		421
495	New(50,PL_tmps_stack,96,SV*);	422	New(50,PL_tmps_stack,128,SV*);
496	PL_tmps_floor = -1;	423	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	424	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	425	PL_tmps_max = 128;
499		426
500	New(54,PL_markstack,16,I32);	427	New(54,PL_markstack,32,I32);
501	PL_markstack_ptr = PL_markstack;	428	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	429	PL_markstack_max = PL_markstack + 32;
503		430
504	#ifdef SET_MARK_OFFSET	431	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;	432	SET_MARK_OFFSET;
506	#endif	433	#endif
507		434
508	New(54,PL_scopestack,16,I32);	435	New(54,PL_scopestack,32,I32);
509	PL_scopestack_ix = 0;	436	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	437	PL_scopestack_max = 32;
511		438
512	New(54,PL_savestack,96,ANY);	439	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	440	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	441	PL_savestack_max = 64;
515		442
		443	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	444	New(54,PL_retstack,16,OP*);
517	PL_retstack_ix = 0;	445	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	446	PL_retstack_max = 16;
		447	#endif
519	}	448	}
520		449
521	/*	450	/*
522	* destroy the stacks, the callchain etc...	451	* destroy the stacks, the callchain etc...
523	* still there is a memleak of 128 bytes...
524	*/	452	*/
525	STATIC void	453	static void
526	destroy_stacks(pTHX)	454	coro_destroy_stacks ()
527	{	455	{
528	if (!IN_DESTRUCT)	456	if (!IN_DESTRUCT)
529	{	457	{
530	/* is this ugly, I ask? */	458	/* is this ugly, I ask? */
531	while (PL_scopestack_ix)	459	LEAVE_SCOPE (0);
532	LEAVE;
533		460
534	/* sure it is, but more important: is it correct?? :/ */	461	/* sure it is, but more important: is it correct?? :/ */
535	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
536	FREETMPS;	462	FREETMPS;
		463
		464	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
537	}	465	}
538		466
539	while (PL_curstackinfo->si_next)	467	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;	468	PL_curstackinfo = PL_curstackinfo->si_next;
541		469
542	while (PL_curstackinfo)	470	while (PL_curstackinfo)
543	{	471	{
544	PERL_SI *p = PL_curstackinfo->si_prev;	472	PERL_SI *p = PL_curstackinfo->si_prev;
545		473
546	{	474	{ /*D*//*remove*/
547	dSP;	475	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	476	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */	477	PUTBACK; /* possibly superfluous */
550	}	478	}
551		479
552	if (!IN_DESTRUCT)	480	if (!IN_DESTRUCT)
553	{	481	{
554	dounwind(-1);	482	dounwind (-1);/*D*//*remove*/
555	SvREFCNT_dec(PL_curstackinfo->si_stack);	483	SvREFCNT_dec (PL_curstackinfo->si_stack);
556	}	484	}
557		485
558	Safefree(PL_curstackinfo->si_cxstack);	486	Safefree (PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);	487	Safefree (PL_curstackinfo);
560	PL_curstackinfo = p;	488	PL_curstackinfo = p;
561	}	489	}
562		490
563	Safefree(PL_tmps_stack);	491	Safefree (PL_tmps_stack);
564	Safefree(PL_markstack);	492	Safefree (PL_markstack);
565	Safefree(PL_scopestack);	493	Safefree (PL_scopestack);
566	Safefree(PL_savestack);	494	Safefree (PL_savestack);
		495	#if !PERL_VERSION_ATLEAST (5,9,0)
567	Safefree(PL_retstack);	496	Safefree (PL_retstack);
568	}
569
570	static void
571	allocate_stack (Coro__State ctx, int alloc)
572	{
573	coro_stack *stack;
574
575	New (0, stack, 1, coro_stack);
576
577	stack->refcnt = 1;
578	stack->usecnt = 1;
579	stack->gencnt = ctx->gencnt = 0;
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif	497	#endif
587	{
588	/*FIXME*//*D*//* reasonable stack size! */
589	stack->ssize = -4096 * sizeof (long);
590	New (0, stack->sptr, 4096, long);
591	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}	498	}
598		499
599	static void	500	static void
600	deallocate_stack (Coro__State ctx)	501	setup_coro (struct coro *coro)
601	{
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#else
615	Safefree (stack->sptr);
616	#endif
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623
624	static void
625	setup_coro (void *arg)
626	{	502	{
627	/*	503	/*
628	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
629	*/	505	*/
630	dSP;
631	Coro__State ctx = (Coro__State)arg;
632	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
633		506
634	coro_init_stacks (aTHX);	507	coro_init_stacks ();
635	/*PL_curcop = 0;*/	508
636	/*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
637	SvREFCNT_dec (GvAV (PL_defgv));	520	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args;	521	GvAV (PL_defgv) = coro->args; coro->args = 0;
639		522
640	SPAGAIN;
641
642	if (ctx->stack)
643	{
644	ctx->cursp = 0;
645
646	PUSHMARK(SP);
647	PUTBACK;
648	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649
650	if (SvTRUE (ERRSV))
651	croak (NULL);
652	else
653	croak ("FATAL: CCTXT coroutine returned!");
654	}
655	else
656	{
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);	523	Zero (&myop, 1, LOGOP);
662	myop.op_next = Nullop;	524	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;	525	myop.op_flags = OPf_WANT_VOID;
664		526
665	PUSHMARK(SP);	527	PUSHMARK (SP);
666	XPUSHs (sub_init);	528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;	529	PUTBACK;
		530	PL_op = (OP *)&myop;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;	532	SPAGAIN;
		533	}
677		534
678	ENTER; /* necessary e.g. for dounwind */	535	ENTER; /* necessary e.g. for dounwind */
679	}
680	}	536	}
681		537
682	static void	538	static void
683	continue_coro (void *arg)	539	free_coro_mortal ()
684	{	540	{
685	/*
686	* this is a _very_ stripped down perl interpreter ;)
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;
692
693	ctx->cursp = 0;
694	PL_op = PL_op->op_next;
695	CALLRUNOPS(aTHX);
696
697	abort ();
698	}
699
700	STATIC void
701	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
702	{
703	dSTACKLEVEL;
704	static struct coro *xnext;
705
706	if (prev != next)
707	{
708	xnext = next;
709
710	if (next->mainstack)
711	{
712	SAVE (prev, flags);
713	LOAD (next);
714
715	/* mark this state as in-use */
716	next->mainstack = 0;
717	next->tmps_ix = -2;
718
719	/* stacklevel changed? if yes, grab the stack for us! */
720	if (flags & TRANSFER_SAVE_CCTXT)
721	{
722	if (!prev->stack)
723	allocate_stack (prev, 0);
724	else if (prev->cursp != stacklevel
725	&& prev->stack->usecnt > 1)
726	{
727	prev->gencnt = ++prev->stack->gencnt;
728	prev->stack->usecnt = 1;
729	}
730
731	/* has our stack been invalidated? */
732	if (next->stack && next->stack->gencnt != next->gencnt)
733	{
734	deallocate_stack (next);
735	allocate_stack (next, 1);
736	coro_create (&(next->stack->cctx),
737	continue_coro, (void *)next,
738	next->stack->sptr, labs (next->stack->ssize));
739	}
740
741	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
742	/* don't add any code here */
743	}
744
745	}
746	else if (next->tmps_ix == -2)
747	croak ("tried to transfer to running coroutine");
748	else
749	{
750	SAVE (prev, -1); /* first get rid of the old state */
751
752	if (flags & TRANSFER_SAVE_CCTXT)
753	{
754	if (!prev->stack)
755	allocate_stack (prev, 0);
756
757	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
758	{
759	PL_top_env = &next->start_env;
760
761	setup_coro (next);
762
763	prev->stack->refcnt++;
764	prev->stack->usecnt++;
765	next->stack = prev->stack;
766	next->gencnt = prev->gencnt;
767	}
768	else
769	{
770	allocate_stack (next, 1);
771	coro_create (&(next->stack->cctx),
772	setup_coro, (void *)next,
773	next->stack->sptr, labs (next->stack->ssize));
774	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
775	/* don't add any code here */
776	}
777	}
778	else
779	setup_coro (next);
780	}
781
782	/*
783	* xnext is now either prev or next, depending on wether
784	* we switched the c stack or not. that's why I use a global
785	* variable, that should become thread-specific at one point.
786	*/
787	xnext->cursp = stacklevel;
788	}
789
790	if (coro_mortal)	541	if (coro_mortal)
791	{	542	{
792	SvREFCNT_dec (coro_mortal);	543	SvREFCNT_dec (coro_mortal);
793	coro_mortal = 0;	544	coro_mortal = 0;
794	}	545	}
795	}	546	}
796		547
797	#define SV_CORO(sv,func) \	548	/* inject a fake call to Coro::State::_cctx_init into the execution */
798	do { \	549	static void NOINLINE
799	if (SvROK (sv)) \	550	prepare_cctx (coro_cctx *cctx)
800	sv = SvRV (sv); \	551	{
801	\	552	dSP;
802	if (SvTYPE(sv) == SVt_PVHV) \	553	LOGOP myop;
803	{ \
804	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
805	\
806	if (!he) \
807	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808	\
809	(sv) = SvRV (HeVAL(he)); \
810	} \
811	\
812	/* must also be changed inside Coro::Cont::yield */ \
813	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
814	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
815	\
816	} while(0)
817		554
818	#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;
819		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
820	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
821	api_transfer(pTHX_ SV *prev, SV *next, int flags)	886	api_transfer (SV *prev_sv, SV *next_sv)
822	{	887	{
823	SV_CORO (prev, "Coro::transfer");	888	struct transfer_args ta;
824	SV_CORO (next, "Coro::transfer");
825		889
826	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;
827	}	904	}
828		905
829	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
830		907
831	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
834	#define PRIO_LOW -1	911	#define PRIO_LOW -1
835	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
836	#define PRIO_MIN -4	913	#define PRIO_MIN -4
837		914
838	/* for Coro.pm */	915	/* for Coro.pm */
839	static GV *coro_current, *coro_idle;	916	static SV *coro_current;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;	918	static int coro_nready;
842		919
843	static void	920	static void
844	coro_enq (SV *sv)	921	coro_enq (SV *coro_sv)
845	{	922	{
846	if (SvTYPE (sv) == SVt_PVHV)
847	{
848	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
849	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
850
851	prio = prio > PRIO_MAX ? PRIO_MAX
852	: prio < PRIO_MIN ? PRIO_MIN
853	: prio;
854
855	av_push (coro_ready [prio - PRIO_MIN], sv);	923	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
856	coro_nready++;	924	coro_nready++;
857
858	return;
859	}
860
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");
862	}	925	}
863		926
864	static SV *	927	static SV *
865	coro_deq (int min_prio)	928	coro_deq (int min_prio)
866	{	929	{
…		…
869	min_prio -= PRIO_MIN;	932	min_prio -= PRIO_MIN;
870	if (min_prio < 0)	933	if (min_prio < 0)
871	min_prio = 0;	934	min_prio = 0;
872		935
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	936	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)	937	if (AvFILLp (coro_ready [prio]) >= 0)
875	{	938	{
876	coro_nready--;	939	coro_nready--;
877	return av_shift (coro_ready[prio]);	940	return av_shift (coro_ready [prio]);
878	}	941	}
879		942
880	return 0;	943	return 0;
881	}	944	}
882		945
883	static void	946	static int
884	api_ready (SV *coro)	947	api_ready (SV *coro_sv)
885	{	948	{
		949	struct coro *coro;
		950
886	if (SvROK (coro))	951	if (SvROK (coro_sv))
887	coro = SvRV (coro);	952	coro_sv = SvRV (coro_sv);
888		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;
889	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);
890	}	1033	}
891		1034
892	static void	1035	static void
893	api_schedule (void)	1036	api_schedule (void)
894	{	1037	{
895	SV *prev, *next;	1038	struct transfer_args ta;
896		1039
897	prev = SvRV (GvSV (coro_current));	1040	prepare_schedule (&ta);
898	next = coro_deq (PRIO_MIN);	1041	TRANSFER (ta);
899
900	if (!next)
901	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
902
903	/* free this only after the transfer */
904	coro_mortal = prev;
905	SV_CORO (prev, "Coro::schedule");
906
907	SvRV (GvSV (coro_current)) = next;
908
909	SV_CORO (next, "Coro::schedule");
910
911	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
912	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
913	}	1042	}
914		1043
915	static void	1044	static void
916	api_cede (void)	1045	api_cede (void)
917	{	1046	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1047	struct transfer_args ta;
919		1048
920	api_schedule ();	1049	prepare_cede (&ta);
		1050	TRANSFER (ta);
921	}	1051	}
922		1052
923	MODULE = Coro::State PACKAGE = Coro::State	1053	MODULE = Coro::State PACKAGE = Coro::State
924		1054
925	PROTOTYPES: ENABLE	1055	PROTOTYPES: DISABLE
926		1056
927	BOOT:	1057	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	1058	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1059	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1060	MUTEX_INIT (&coro_mutex);
		1061	#endif
		1062	BOOT_PAGESIZE;
		1063
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1064	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1065
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1066	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1067	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
935	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));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1070	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
937
938	if (!padlist_cache)
939	padlist_cache = newHV ();
940		1071
941	main_mainstack = PL_mainstack;	1072	main_mainstack = PL_mainstack;
942		1073
943	coroapi.ver = CORO_API_VERSION;	1074	coroapi.ver = CORO_API_VERSION;
944	coroapi.transfer = api_transfer;	1075	coroapi.transfer = api_transfer;
945	}
946		1076
947	Coro::State	1077	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
948	_newprocess(args)	1078	}
949	SV * args	1079
950	PROTOTYPE: $	1080	SV *
		1081	new (char *klass, ...)
951	CODE:	1082	CODE:
952	Coro__State coro;	1083	{
		1084	struct coro *coro;
		1085	HV *hv;
		1086	int i;
953		1087
954	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
955	croak ("Coro::State::_newprocess expects an arrayref");
956
957	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;
958		1092
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1093	hv = newHV ();
960	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;
961	coro->stack = 0;	1095	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
962		1096
963	/* same as JMPENV_BOOTSTRAP */	1097	for (i = 1; i < items; i++)
964	/* we might be able to recycle start_env, but safe is safe */	1098	av_push (coro->args, newSVsv (ST (i)));
965	Zero(&coro->start_env, 1, JMPENV);	1099	}
966	coro->start_env.je_ret = -1;
967	coro->start_env.je_mustcatch = TRUE;
968
969	RETVAL = coro;
970	OUTPUT:	1100	OUTPUT:
971	RETVAL	1101	RETVAL
972		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
973	void	1110	void
974	transfer(prev, next, flags)	1111	_set_stacklevel (...)
975	SV *prev	1112	ALIAS:
976	SV *next	1113	Coro::State::transfer = 1
977	int flags	1114	Coro::schedule = 2
978	PROTOTYPE: @	1115	Coro::cede = 3
979	CODE:	1116	CODE:
980	PUTBACK;	1117	{
981	SV_CORO (next, "Coro::transfer");	1118	struct transfer_args ta;
982	SV_CORO (prev, "Coro::transfer");	1119
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1120	switch (ix)
984	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	}
985		1145
986	void	1146	void
987	DESTROY(coro)	1147	_clone_state_from (SV *dst, SV *src)
988	Coro::State coro	1148	CODE:
989	CODE:	1149	{
		1150	struct coro *coro_src = SvSTATE (src);
990		1151
991	if (coro->mainstack && coro->mainstack != main_mainstack)	1152	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
992	{
993	struct coro temp;
994		1153
995	PUTBACK;	1154	++coro_src->refcnt;
996	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;
997	LOAD(aTHX_ coro);	1156	}
998	SPAGAIN;
999
1000	destroy_stacks (aTHX);
1001
1002	LOAD((&temp)); /* this will get rid of defsv etc.. */
1003	SPAGAIN;
1004
1005	coro->mainstack = 0;
1006	}
1007
1008	deallocate_stack (coro);
1009
1010	Safefree (coro);
1011		1157
1012	void	1158	void
1013	flush()
1014	CODE:
1015	#ifdef MAY_FLUSH
1016	flush_padlist_cache ();
1017	#endif
1018
1019	void
1020	_exit(code)	1159	_exit (code)
1021	int code	1160	int code
1022	PROTOTYPE: $	1161	PROTOTYPE: $
1023	CODE:	1162	CODE:
1024	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1025	_exit (code);	1163	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1164
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1165	int
		1166	cctx_count ()
		1167	CODE:
		1168	RETVAL = cctx_count;
		1169	OUTPUT:
		1170	RETVAL
1033		1171
1034	# this is slightly dirty (should expose a c-level api)	1172	int
1035		1173	cctx_idle ()
1036	void	1174	CODE:
1037	yield(...)	1175	RETVAL = cctx_idle;
1038	PROTOTYPE: @	1176	OUTPUT:
1039	CODE:	1177	RETVAL
1040	static SV *returnstk;
1041	SV *sv;
1042	AV *defav = GvAV (PL_defgv);
1043	struct coro *prev, *next;
1044
1045	if (!returnstk)
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048	/* set up @_ -- ugly */
1049	av_clear (defav);
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1057	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1178
1062	MODULE = Coro::State PACKAGE = Coro	1179	MODULE = Coro::State PACKAGE = Coro
1063		1180
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1181	BOOT:
1067	{	1182	{
1068	int i;	1183	int i;
		1184
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1185	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1186
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1187	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1188	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1189	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1190	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1191	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1192	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1193
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1194	coro_current = get_sv ("Coro::current", FALSE);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1195	SvREADONLY_on (coro_current);
1080		1196
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1197	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1198	coro_ready[i] = newAV ();
1083		1199
1084	{	1200	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1201	SV *sv = perl_get_sv("Coro::API", 1);
1086		1202
1087	coroapi.schedule = api_schedule;	1203	coroapi.schedule = api_schedule;
		1204	coroapi.save = api_save;
1088	coroapi.cede = api_cede;	1205	coroapi.cede = api_cede;
1089	coroapi.ready = api_ready;	1206	coroapi.ready = api_ready;
		1207	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1208	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1209	coroapi.current = coro_current;
1092		1210
1093	GCoroAPI = &coroapi;	1211	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1212	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1213	SvREADONLY_on (sv);
1096	}	1214	}
1097	}	1215	}
1098		1216
1099	void	1217	void
1100	ready(self)	1218	_set_current (SV *current)
1101	SV * self
1102	PROTOTYPE: $	1219	PROTOTYPE: $
1103	CODE:	1220	CODE:
1104	api_ready (self);	1221	SvREFCNT_dec (SvRV (coro_current));
		1222	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1105		1223
1106	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
1107	nready(...)	1261	nready (...)
1108	PROTOTYPE:	1262	PROTOTYPE:
1109	CODE:	1263	CODE:
1110	RETVAL = coro_nready;	1264	RETVAL = coro_nready;
1111	OUTPUT:	1265	OUTPUT:
1112	RETVAL	1266	RETVAL
1113		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
1114	void	1289	void
1115	schedule(...)	1290	_set_state (char *data_)
1116	PROTOTYPE:	1291	PROTOTYPE: $
1117	CODE:	1292	CODE:
1118	api_schedule ();	1293	{
		1294	struct io_state *data = (void *)data_;
1119		1295
1120	void	1296	errno = data->errorno;
1121	cede(...)	1297	PL_laststype = data->laststype;
1122	PROTOTYPE:	1298	PL_laststatval = data->laststatval;
1123	CODE:	1299	PL_statcache = data->statcache;
1124	api_cede ();	1300	}
1125		1301

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