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Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.128 by root, Fri Dec 22 04:22:28 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	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
10	# endif	52	# endif
11	# ifndef call_sv	53	# ifndef call_sv
12	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
25	# endif	67	# endif
26	#endif	68	#endif
27		69
28	#include "libcoro/coro.c"	70	/* 5.8.7 */
29		71	#ifndef SvRV_set
30	#include <signal.h>	72	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	73	#endif
42	#endif
43		74
44	#define SUB_INIT "Coro::State::initialize"	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
45	#define UCORO_STATE "_coro_state"	76	# undef STACKGUARD
		77	#endif
		78
		79	#ifndef STACKGUARD
		80	# define STACKGUARD 0
		81	#endif
		82
		83	/* prefer perl internal functions over our own? */
		84	#ifndef PREFER_PERL_FUNCTIONS
		85	# define PREFER_PERL_FUNCTIONS 0
		86	#endif
46		87
47	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
48	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
49	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
51		93
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		95
54	#define labs(l) ((l) >= 0 ? (l) : -(l))	96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	#else
		99	# define attribute(x)
		100	#endif
		101
		102	#define NOINLINE attribute ((noinline))
55		103
56	#include "CoroAPI.h"	104	#include "CoroAPI.h"
57		105
58	#ifdef USE_ITHREADS	106	#ifdef USE_ITHREADS
59	static perl_mutex coro_mutex;	107	static perl_mutex coro_mutex;
60	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	108	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
61	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	109	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
62	#else	110	#else
63	# define LOCK 0	111	# define LOCK (void)0
64	# define UNLOCK 0	112	# define UNLOCK (void)0
65	#endif	113	#endif
		114
		115	struct io_state
		116	{
		117	int errorno;
		118	I32 laststype;
		119	int laststatval;
		120	Stat_t statcache;
		121	};
66		122
67	static struct CoroAPI coroapi;	123	static struct CoroAPI coroapi;
		124	static AV *main_mainstack; /* used to differentiate between $main and others */
		125	static HV *coro_state_stash, *coro_stash;
		126	static SV *coro_mortal; /* will be freed after next transfer */
68		127
69	/* this is actually not only the c stack but also c registers etc... */	128	static struct coro_cctx *cctx_first;
		129	static int cctx_count, cctx_idle;
		130
		131	/* this is a structure representing a c-level coroutine */
70	typedef struct {	132	typedef struct coro_cctx {
71	int refcnt; /* pointer reference counter */	133	struct coro_cctx *next;
72	int usecnt; /* shared by how many coroutines */
73	int gencnt; /* generation counter */
74		134
75	coro_context cctx;	135	/* the stack */
76
77	void *sptr;	136	void *sptr;
78	long ssize; /* positive == mmap, otherwise malloc */	137	long ssize; /* positive == mmap, otherwise malloc */
79	} coro_stack;
80		138
		139	/* cpu state */
		140	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		141	JMPENV *top_env;
		142	coro_context cctx;
		143
		144	int inuse;
		145
		146	#if USE_VALGRIND
		147	int valgrind_id;
		148	#endif
		149	} coro_cctx;
		150
		151	enum {
		152	CF_RUNNING = 0x0001, /* coroutine is running */
		153	CF_READY = 0x0002, /* coroutine is ready */
		154	CF_NEW = 0x0004, /* ahs never been switched to */
		155	};
		156
		157	/* this is a structure representing a perl-level coroutine */
81	struct coro {	158	struct coro {
82	/* the top-level JMPENV for each coroutine, needed to catch dies. */	159	/* the c coroutine allocated to this perl coroutine, if any */
83	JMPENV start_env;	160	coro_cctx *cctx;
84
85	/* the optional C context */
86	coro_stack *stack;
87	void *cursp;
88	int gencnt;
89
90	/* optionally saved, might be zero */
91	AV *defav;
92	SV *defsv;
93	SV *errsv;
94
95	/* saved global state not related to stacks */
96	U8 dowarn;
97	I32 in_eval;
98
99	/* the stacks and related info (callchain etc..) */
100	PERL_SI *curstackinfo;
101	AV *curstack;
102	AV *mainstack;
103	SV **stack_sp;
104	OP *op;
105	SV **curpad;
106	AV *comppad;
107	SV **stack_base;
108	SV **stack_max;
109	SV **tmps_stack;
110	I32 tmps_floor;
111	I32 tmps_ix;
112	I32 tmps_max;
113	I32 *markstack;
114	I32 *markstack_ptr;
115	I32 *markstack_max;
116	I32 *scopestack;
117	I32 scopestack_ix;
118	I32 scopestack_max;
119	ANY *savestack;
120	I32 savestack_ix;
121	I32 savestack_max;
122	OP **retstack;
123	I32 retstack_ix;
124	I32 retstack_max;
125	COP *curcop;
126	JMPENV *top_env;
127		161
128	/* data associated with this coroutine (initial args) */	162	/* data associated with this coroutine (initial args) */
129	AV *args;	163	AV *args;
		164	int refcnt;
		165	int save; /* CORO_SAVE flags */
		166	int flags; /* CF_ flags */
		167
		168	/* optionally saved, might be zero */
		169	AV *defav; /* @_ */
		170	SV *defsv; /* $_ */
		171	SV *errsv; /* $@ */
		172	SV *irssv; /* $/ */
		173	SV *irssv_sv; /* real $/ cache */
		174
		175	#define VAR(name,type) type name;
		176	# include "state.h"
		177	#undef VAR
		178
		179	/* coro process data */
		180	int prio;
130	};	181	};
131		182
132	typedef struct coro *Coro__State;	183	typedef struct coro *Coro__State;
133	typedef struct coro *Coro__State_or_hashref;	184	typedef struct coro *Coro__State_or_hashref;
134		185
135	static AV *main_mainstack; /* used to differentiate between $main and others */	186	static AV *
136	static HV *coro_state_stash;	187	coro_clone_padlist (CV *cv)
137	static SV *ucoro_state_sv;
138	static U32 ucoro_state_hash;
139	static SV *coro_mortal; /* will be freed after next transfer */
140
141	/* mostly copied from op.c:cv_clone2 */
142	STATIC AV *
143	clone_padlist (AV *protopadlist)
144	{	188	{
145	AV *av;	189	AV *padlist = CvPADLIST (cv);
146	I32 ix;
147	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
148	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
149	SV **pname = AvARRAY (protopad_name);
150	SV **ppad = AvARRAY (protopad);
151	I32 fname = AvFILLp (protopad_name);
152	I32 fpad = AvFILLp (protopad);
153	AV *newpadlist, *newpad_name, *newpad;	190	AV *newpadlist, *newpad;
154	SV **npad;
155
156	newpad_name = newAV ();
157	for (ix = fname; ix >= 0; ix--)
158	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
159
160	newpad = newAV ();
161	av_fill (newpad, AvFILLp (protopad));
162	npad = AvARRAY (newpad);
163		191
164	newpadlist = newAV ();	192	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	193	AvREAL_off (newpadlist);
166	av_store (newpadlist, 0, (SV *) newpad_name);	194	#if PERL_VERSION_ATLEAST (5,9,0)
		195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		196	#else
		197	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		198	#endif
		199	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		200	--AvFILLp (padlist);
		201
		202	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
167	av_store (newpadlist, 1, (SV *) newpad);	203	av_store (newpadlist, 1, (SV *)newpad);
168
169	av = newAV (); /* will be @_ */
170	av_extend (av, 0);
171	av_store (newpad, 0, (SV *) av);
172	AvFLAGS (av) = AVf_REIFY;
173
174	for (ix = fpad; ix > 0; ix--)
175	{
176	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
177
178	if (namesv && namesv != &PL_sv_undef)
179	{
180	char *name = SvPVX (namesv); /* XXX */
181
182	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
183	{ /* lexical from outside? */
184	npad[ix] = SvREFCNT_inc (ppad[ix]);
185	}
186	else
187	{ /* our own lexical */
188	SV *sv;
189	if (*name == '&')
190	sv = SvREFCNT_inc (ppad[ix]);
191	else if (*name == '@')
192	sv = (SV *) newAV ();
193	else if (*name == '%')
194	sv = (SV *) newHV ();
195	else
196	sv = NEWSV (0, 0);
197
198	#ifdef SvPADBUSY
199	if (!SvPADBUSY (sv))
200	#endif
201	SvPADMY_on (sv);
202
203	npad[ix] = sv;
204	}
205	}
206	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
207	{
208	npad[ix] = SvREFCNT_inc (ppad[ix]);
209	}
210	else
211	{
212	SV *sv = NEWSV (0, 0);
213	SvPADTMP_on (sv);
214	npad[ix] = sv;
215	}
216	}
217
218	#if 0 /* return -ENOTUNDERSTOOD */
219	/* Now that vars are all in place, clone nested closures. */
220
221	for (ix = fpad; ix > 0; ix--) {
222	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
223	if (namesv
224	&& namesv != &PL_sv_undef
225	&& !(SvFLAGS(namesv) & SVf_FAKE)
226	&& *SvPVX(namesv) == '&'
227	&& CvCLONE(ppad[ix]))
228	{
229	CV *kid = cv_clone((CV*)ppad[ix]);
230	SvREFCNT_dec(ppad[ix]);
231	CvCLONE_on(kid);
232	SvPADMY_on(kid);
233	npad[ix] = (SV*)kid;
234	}
235	}
236	#endif
237		204
238	return newpadlist;	205	return newpadlist;
239	}	206	}
240		207
241	STATIC void	208	static void
242	free_padlist (AV *padlist)	209	free_padlist (AV *padlist)
243	{	210	{
244	/* may be during global destruction */	211	/* may be during global destruction */
245	if (SvREFCNT (padlist))	212	if (SvREFCNT (padlist))
246	{	213	{
…		…
260		227
261	SvREFCNT_dec ((SV*)padlist);	228	SvREFCNT_dec ((SV*)padlist);
262	}	229	}
263	}	230	}
264		231
265	STATIC int	232	static int
266	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	233	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267	{	234	{
268	AV *padlist;	235	AV *padlist;
269	AV *av = (AV *)mg->mg_obj;	236	AV *av = (AV *)mg->mg_obj;
270		237
271	/* casting is fun. */	238	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	239	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (padlist);	240	free_padlist (padlist);
		241
		242	SvREFCNT_dec (av);
		243
		244	return 0;
274	}	245	}
275		246
276	#define PERL_MAGIC_coro PERL_MAGIC_ext	247	#define PERL_MAGIC_coro PERL_MAGIC_ext
277		248
278	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	249	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
279		250
		251	#define CORO_MAGIC(cv) \
		252	SvMAGIC (cv) \
		253	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		254	? SvMAGIC (cv) \
		255	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		256	: 0
		257
280	/* the next two functions merely cache the padlists */	258	/* the next two functions merely cache the padlists */
281	STATIC void	259	static void
282	get_padlist (CV *cv)	260	get_padlist (CV *cv)
283	{	261	{
284	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	262	MAGIC *mg = CORO_MAGIC (cv);
		263	AV *av;
285		264
286	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
287	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288	else	267	else
		268	{
		269	#if PREFER_PERL_FUNCTIONS
		270	/* this is probably cleaner, but also slower? */
		271	CV *cp = Perl_cv_clone (cv);
		272	CvPADLIST (cv) = CvPADLIST (cp);
		273	CvPADLIST (cp) = 0;
		274	SvREFCNT_dec (cp);
		275	#else
289	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	276	CvPADLIST (cv) = coro_clone_padlist (cv);
		277	#endif
		278	}
290	}	279	}
291		280
292	STATIC void	281	static void
293	put_padlist (CV *cv)	282	put_padlist (CV *cv)
294	{	283	{
295	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	284	MAGIC *mg = CORO_MAGIC (cv);
		285	AV *av;
296		286
297	if (!mg)	287	if (!mg)
298	{	288	{
299	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
300	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301	mg->mg_virtual = &vtbl_coro;	291	mg->mg_virtual = &vtbl_coro;
302	mg->mg_obj = (SV *)newAV ();	292	mg->mg_obj = (SV *)newAV ();
303	}	293	}
304		294
305	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	295	av = (AV *)mg->mg_obj;
		296
		297	if (AvFILLp (av) >= AvMAX (av))
		298	av_extend (av, AvMAX (av) + 1);
		299
		300	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
306	}	301	}
307		302
308	#define SB do {	303	#define SB do {
309	#define SE } while (0)	304	#define SE } while (0)
310		305
311	#define LOAD(state) load_state(aTHX_ (state));
312	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
313
314	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	306	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
315		307
316	static void	308	static void
317	load_state(pTHX_ Coro__State c)	309	load_perl (Coro__State c)
318	{	310	{
319	PL_dowarn = c->dowarn;	311	#define VAR(name,type) PL_ ## name = c->name;
320	PL_in_eval = c->in_eval;	312	# include "state.h"
321		313	#undef VAR
322	PL_curstackinfo = c->curstackinfo;
323	PL_curstack = c->curstack;
324	PL_mainstack = c->mainstack;
325	PL_stack_sp = c->stack_sp;
326	PL_op = c->op;
327	PL_curpad = c->curpad;
328	PL_comppad = c->comppad;
329	PL_stack_base = c->stack_base;
330	PL_stack_max = c->stack_max;
331	PL_tmps_stack = c->tmps_stack;
332	PL_tmps_floor = c->tmps_floor;
333	PL_tmps_ix = c->tmps_ix;
334	PL_tmps_max = c->tmps_max;
335	PL_markstack = c->markstack;
336	PL_markstack_ptr = c->markstack_ptr;
337	PL_markstack_max = c->markstack_max;
338	PL_scopestack = c->scopestack;
339	PL_scopestack_ix = c->scopestack_ix;
340	PL_scopestack_max = c->scopestack_max;
341	PL_savestack = c->savestack;
342	PL_savestack_ix = c->savestack_ix;
343	PL_savestack_max = c->savestack_max;
344	PL_retstack = c->retstack;
345	PL_retstack_ix = c->retstack_ix;
346	PL_retstack_max = c->retstack_max;
347	PL_curcop = c->curcop;
348	PL_top_env = c->top_env;
349		314
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		318	if (c->irssv)
		319	{
		320	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		321	SvREFCNT_dec (c->irssv);
		322	else
		323	{
		324	REPLACE_SV (PL_rs, c->irssv);
		325	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		326	sv_setsv (c->irssv_sv, PL_rs);
		327	}
		328	}
353		329
354	{	330	{
355	dSP;	331	dSP;
356	CV *cv;	332	CV *cv;
357		333
358	/* now do the ugly restore mess */	334	/* now do the ugly restore mess */
359	while ((cv = (CV *)POPs))	335	while ((cv = (CV *)POPs))
360	{	336	{
361	AV *padlist = (AV *)POPs;
362
363	if (padlist)
364	{
365	put_padlist (cv); /* mark this padlist as available */	337	put_padlist (cv); /* mark this padlist as available */
366	CvPADLIST(cv) = padlist;	338	CvDEPTH (cv) = PTR2IV (POPs);
367	}	339	CvPADLIST (cv) = (AV *)POPs;
368
369	++CvDEPTH(cv);
370	}	340	}
371		341
372	PUTBACK;	342	PUTBACK;
373	}	343	}
374	}	344	}
375		345
376	static void	346	static void
377	save_state(pTHX_ Coro__State c, int flags)	347	save_perl (Coro__State c)
378	{	348	{
379	{	349	{
380	dSP;	350	dSP;
381	I32 cxix = cxstack_ix;	351	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	352	PERL_CONTEXT *ccstk = cxstack;
…		…
385	/*	355	/*
386	* the worst thing you can imagine happens first - we have to save	356	* the worst thing you can imagine happens first - we have to save
387	* (and reinitialize) all cv's in the whole callchain :(	357	* (and reinitialize) all cv's in the whole callchain :(
388	*/	358	*/
389		359
		360	EXTEND (SP, 3 + 1);
390	PUSHs (Nullsv);	361	PUSHs (Nullsv);
391	/* this loop was inspired by pp_caller */	362	/* this loop was inspired by pp_caller */
392	for (;;)	363	for (;;)
393	{	364	{
394	while (cxix >= 0)	365	while (cxix >= 0)
395	{	366	{
396	PERL_CONTEXT *cx = &ccstk[cxix--];	367	PERL_CONTEXT *cx = &ccstk[cxix--];
397		368
398	if (CxTYPE(cx) == CXt_SUB)	369	if (CxTYPE (cx) == CXt_SUB)
399	{	370	{
400	CV *cv = cx->blk_sub.cv;	371	CV *cv = cx->blk_sub.cv;
		372
401	if (CvDEPTH(cv))	373	if (CvDEPTH (cv))
402	{	374	{
403	EXTEND (SP, CvDEPTH(cv)*2);	375	EXTEND (SP, 3);
404
405	while (--CvDEPTH(cv))
406	{
407	/* this tells the restore code to increment CvDEPTH */
408	PUSHs (Nullsv);
409	PUSHs ((SV *)cv);
410	}
411
412	PUSHs ((SV *)CvPADLIST(cv));	376	PUSHs ((SV *)CvPADLIST (cv));
		377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
413	PUSHs ((SV *)cv);	378	PUSHs ((SV *)cv);
414		379
		380	CvDEPTH (cv) = 0;
415	get_padlist (cv); /* this is a monster */	381	get_padlist (cv);
416	}	382	}
417	}	383	}
418	#ifdef CXt_FORMAT
419	else if (CxTYPE(cx) == CXt_FORMAT)
420	{
421	/* I never used formats, so how should I know how these are implemented? */
422	/* my bold guess is as a simple, plain sub... */
423	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
424	}
425	#endif
426	}	384	}
427		385
428	if (top_si->si_type == PERLSI_MAIN)	386	if (top_si->si_type == PERLSI_MAIN)
429	break;	387	break;
430		388
…		…
434	}	392	}
435		393
436	PUTBACK;	394	PUTBACK;
437	}	395	}
438		396
439	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	397	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
440	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
441	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	399	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		400	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
442		401
443	c->dowarn = PL_dowarn;	402	#define VAR(name,type)c->name = PL_ ## name;
444	c->in_eval = PL_in_eval;	403	# include "state.h"
445		404	#undef VAR
446	c->curstackinfo = PL_curstackinfo;
447	c->curstack = PL_curstack;
448	c->mainstack = PL_mainstack;
449	c->stack_sp = PL_stack_sp;
450	c->op = PL_op;
451	c->curpad = PL_curpad;
452	c->comppad = PL_comppad;
453	c->stack_base = PL_stack_base;
454	c->stack_max = PL_stack_max;
455	c->tmps_stack = PL_tmps_stack;
456	c->tmps_floor = PL_tmps_floor;
457	c->tmps_ix = PL_tmps_ix;
458	c->tmps_max = PL_tmps_max;
459	c->markstack = PL_markstack;
460	c->markstack_ptr = PL_markstack_ptr;
461	c->markstack_max = PL_markstack_max;
462	c->scopestack = PL_scopestack;
463	c->scopestack_ix = PL_scopestack_ix;
464	c->scopestack_max = PL_scopestack_max;
465	c->savestack = PL_savestack;
466	c->savestack_ix = PL_savestack_ix;
467	c->savestack_max = PL_savestack_max;
468	c->retstack = PL_retstack;
469	c->retstack_ix = PL_retstack_ix;
470	c->retstack_max = PL_retstack_max;
471	c->curcop = PL_curcop;
472	c->top_env = PL_top_env;
473	}	405	}
474		406
475	/*	407	/*
476	* allocate various perl stacks. This is an exact copy	408	* allocate various perl stacks. This is an exact copy
477	* of perl.c:init_stacks, except that it uses less memory	409	* of perl.c:init_stacks, except that it uses less memory
478	* on the (sometimes correct) assumption that coroutines do	410	* on the (sometimes correct) assumption that coroutines do
479	* not usually need a lot of stackspace.	411	* not usually need a lot of stackspace.
480	*/	412	*/
481	STATIC void	413	#if PREFER_PERL_FUNCTIONS
		414	# define coro_init_stacks init_stacks
		415	#else
		416	static void
482	coro_init_stacks (pTHX)	417	coro_init_stacks ()
483	{	418	{
484	LOCK;
485
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
487	PL_curstackinfo->si_type = PERLSI_MAIN;	420	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	421	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		423
491	PL_stack_base = AvARRAY(PL_curstack);	424	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	425	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		427
495	New(50,PL_tmps_stack,96,SV*);	428	New(50,PL_tmps_stack,128,SV*);
496	PL_tmps_floor = -1;	429	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	430	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	431	PL_tmps_max = 128;
499		432
500	New(54,PL_markstack,16,I32);	433	New(54,PL_markstack,32,I32);
501	PL_markstack_ptr = PL_markstack;	434	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	435	PL_markstack_max = PL_markstack + 32;
503		436
504	#ifdef SET_MARK_OFFSET	437	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;	438	SET_MARK_OFFSET;
506	#endif	439	#endif
507		440
508	New(54,PL_scopestack,16,I32);	441	New(54,PL_scopestack,32,I32);
509	PL_scopestack_ix = 0;	442	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	443	PL_scopestack_max = 32;
511		444
512	New(54,PL_savestack,96,ANY);	445	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	446	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	447	PL_savestack_max = 64;
515		448
		449	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	450	New(54,PL_retstack,16,OP*);
517	PL_retstack_ix = 0;	451	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	452	PL_retstack_max = 16;
519		453	#endif
520	UNLOCK;
521	}	454	}
		455	#endif
522		456
523	/*	457	/*
524	* destroy the stacks, the callchain etc...	458	* destroy the stacks, the callchain etc...
525	*/	459	*/
526	STATIC void	460	static void
527	destroy_stacks(pTHX)	461	coro_destroy_stacks ()
528	{	462	{
529	if (!IN_DESTRUCT)	463	if (!IN_DESTRUCT)
530	{	464	{
531	/* is this ugly, I ask? */	465	/* restore all saved variables and stuff */
532	LEAVE_SCOPE (0);	466	LEAVE_SCOPE (0);
		467	assert (PL_tmps_floor == -1);
533		468
534	/* sure it is, but more important: is it correct?? :/ */	469	/* free all temporaries */
535	FREETMPS;	470	FREETMPS;
		471	assert (PL_tmps_ix == -1);
		472
		473	POPSTACK_TO (PL_mainstack);
536	}	474	}
537		475
538	while (PL_curstackinfo->si_next)	476	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	477	PL_curstackinfo = PL_curstackinfo->si_next;
540		478
541	while (PL_curstackinfo)	479	while (PL_curstackinfo)
542	{	480	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	481	PERL_SI *p = PL_curstackinfo->si_prev;
544		482
545	{
546	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */
549	}
550
551	if (!IN_DESTRUCT)	483	if (!IN_DESTRUCT)
552	{
553	dounwind(-1);
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	484	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}
556		485
557	Safefree(PL_curstackinfo->si_cxstack);	486	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	487	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	488	PL_curstackinfo = p;
560	}	489	}
561		490
562	Safefree(PL_tmps_stack);	491	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	492	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	493	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	494	Safefree (PL_savestack);
		495	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	496	Safefree (PL_retstack);
567	}
568
569	static void
570	allocate_stack (Coro__State ctx, int alloc)
571	{
572	coro_stack *stack;
573
574	New (0, stack, 1, coro_stack);
575
576	stack->refcnt = 1;
577	stack->usecnt = 1;
578	stack->gencnt = ctx->gencnt = 0;
579
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 16384 * 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 = - (8192 * sizeof (long));
590	New (0, stack->sptr, 8192, 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	#endif
615	Safefree (stack->sptr);
616
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	*/
		506
		507	coro_init_stacks ();
		508
		509	PL_curcop = &PL_compiling;
		510	PL_in_eval = EVAL_NULL;
		511	PL_curpm = 0;
		512	PL_localizing = 0;
		513	PL_dirty = 0;
		514	PL_restartop = 0;
		515
		516	{
		517	dSP;
		518	LOGOP myop;
		519
		520	SvREFCNT_dec (GvAV (PL_defgv));
		521	GvAV (PL_defgv) = coro->args; coro->args = 0;
		522
		523	Zero (&myop, 1, LOGOP);
		524	myop.op_next = Nullop;
		525	myop.op_flags = OPf_WANT_VOID;
		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		529	PUTBACK;
		530	PL_op = (OP *)&myop;
		531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		532	SPAGAIN;
		533	}
		534
		535	ENTER; /* necessary e.g. for dounwind */
		536	}
		537
		538	static void
		539	free_coro_mortal ()
		540	{
		541	if (coro_mortal)
		542	{
		543	SvREFCNT_dec (coro_mortal);
		544	coro_mortal = 0;
		545	}
		546	}
		547
		548	/* inject a fake call to Coro::State::_cctx_init into the execution */
		549	static void NOINLINE
		550	prepare_cctx (coro_cctx *cctx)
		551	{
630	dSP;	552	dSP;
631	Coro__State ctx = (Coro__State)arg;	553	LOGOP myop;
632	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
633		554
634	coro_init_stacks (aTHX);	555	Zero (&myop, 1, LOGOP);
635	/*PL_curcop = 0;*/	556	myop.op_next = PL_op;
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */	557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
637	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
639		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);
640	SPAGAIN;	566	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);
662	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;
664
665	PUSHMARK(SP);
666	XPUSHs (sub_init);
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;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;
677
678	ENTER; /* necessary e.g. for dounwind */
679	}
680	}	567	}
681		568
682	static void	569	static void
683	continue_coro (void *arg)	570	coro_run (void *arg)
684	{	571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
		573	UNLOCK;
		574
685	/*	575	/*
686	* this is a _very_ stripped down perl interpreter ;)	576	* this is a _very_ stripped down perl interpreter ;)
687	*/	577	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;	578	PL_top_env = &PL_start_env;
692		579
693	ctx->cursp = 0;	580	/* inject call to cctx_init */
694	PL_op = PL_op->op_next;	581	prepare_cctx ((coro_cctx *)arg);
695	CALLRUNOPS(aTHX);
696		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);
697	abort ();	588	abort ();
698	}	589	}
699		590
700	STATIC void	591	static coro_cctx *
		592	cctx_new ()
		593	{
		594	coro_cctx *cctx;
		595
		596	++cctx_count;
		597
		598	Newz (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
701	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	703	transfer (struct coro *prev, struct coro *next)
702	{	704	{
703	dSTACKLEVEL;	705	dSTACKLEVEL;
704		706
		707	/* sometimes transfer is only called to set idle_sp */
		708	if (!next)
		709	{
		710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		711	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		712	}
705	if (prev != next)	713	else if (prev != next)
706	{	714	{
707	if (next->mainstack)	715	coro_cctx *prev__cctx;
		716
		717	if (prev->flags & CF_NEW)
708	{	718	{
709	LOCK;	719	/* create a new empty context */
710	SAVE (prev, flags);	720	Newz (0, prev->cctx, 1, coro_cctx);
711	LOAD (next);	721	prev->cctx->inuse = 1;
712	UNLOCK;	722	prev->flags &= ~CF_NEW;
713		723	prev->flags |= CF_RUNNING;
714	/* mark this state as in-use */
715	next->mainstack = 0;
716	next->tmps_ix = -2;
717
718	/* stacklevel changed? if yes, grab the stack for us! */
719	if (flags & TRANSFER_SAVE_CCTXT)
720	{
721	if (!prev->stack)
722	allocate_stack (prev, 0);
723	else if (prev->cursp != stacklevel
724	&& prev->stack->usecnt > 1)
725	{
726	prev->gencnt = ++prev->stack->gencnt;
727	prev->stack->usecnt = 1;
728	}
729
730	/* has our stack been invalidated? */
731	if (next->stack && next->stack->gencnt != next->gencnt)
732	{
733	deallocate_stack (next);
734	allocate_stack (next, 1);
735	coro_create (&(next->stack->cctx),
736	continue_coro, (void *)next,
737	next->stack->sptr, labs (next->stack->ssize));
738	}
739
740	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741	prev->cursp = stacklevel;
742	/* don't add any code here */
743	}
744	else
745	next->cursp = stacklevel;
746	}	724	}
747	else if (next->tmps_ix == -2)	725
748	croak ("tried to transfer to running coroutine");	726	/*TODO: must not croak here */
		727	if (!prev->flags & CF_RUNNING)
		728	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		729
		730	if (next->flags & CF_RUNNING)
		731	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		732
		733	prev->flags &= ~CF_RUNNING;
		734	next->flags |= CF_RUNNING;
		735
		736	LOCK;
		737
		738	if (next->flags & CF_NEW)
		739	{
		740	/* need to start coroutine */
		741	next->flags &= ~CF_NEW;
		742	/* first get rid of the old state */
		743	save_perl (prev);
		744	/* setup coroutine call */
		745	setup_coro (next);
		746	/* need a new stack */
		747	assert (!next->cctx);
		748	}
749	else	749	else
750	{	750	{
751	LOCK;	751	/* coroutine already started */
752	SAVE (prev, -1); /* first get rid of the old state */	752	save_perl (prev);
753	UNLOCK;	753	load_perl (next);
754
755	if (flags & TRANSFER_SAVE_CCTXT)
756	{
757	if (!prev->stack)
758	allocate_stack (prev, 0);
759
760	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
761	{
762	PL_top_env = &next->start_env;
763
764	setup_coro (next);
765	next->cursp = stacklevel;
766
767	prev->stack->refcnt++;
768	prev->stack->usecnt++;
769	next->stack = prev->stack;
770	next->gencnt = prev->gencnt;
771	}
772	else
773	{
774	assert (!next->stack);
775	allocate_stack (next, 1);
776	coro_create (&(next->stack->cctx),
777	setup_coro, (void *)next,
778	next->stack->sptr, labs (next->stack->ssize));
779	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
780	prev->cursp = stacklevel;
781	/* don't add any code here */
782	}
783	}
784	else
785	{
786	setup_coro (next);
787	next->cursp = stacklevel;
788	}
789	}	754	}
790	}
791		755
792	LOCK;	756	prev__cctx = prev->cctx;
793	if (coro_mortal)	757
794	{	758	/* possibly "free" the cctx */
795	SvREFCNT_dec (coro_mortal);	759	if (prev__cctx->idle_sp == STACKLEVEL)
		760	{
		761	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		762	assert (PL_top_env == prev__cctx->top_env);
		763
		764	prev->cctx = 0;
		765
		766	cctx_put (prev__cctx);
		767	prev__cctx->inuse = 0;
		768	}
		769
		770	if (!next->cctx)
		771	{
		772	next->cctx = cctx_get ();
		773	assert (!next->cctx->inuse);
		774	next->cctx->inuse = 1;
		775	}
		776
		777	if (prev__cctx != next->cctx)
		778	{
		779	prev__cctx->top_env = PL_top_env;
		780	PL_top_env = next->cctx->top_env;
		781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		782	}
		783
796	coro_mortal = 0;	784	free_coro_mortal ();
797	}	785
798	UNLOCK;	786	UNLOCK;
		787	}
799	}	788	}
800		789
801	#define SV_CORO(sv,func) \	790	struct transfer_args
802	do { \	791	{
803	if (SvROK (sv)) \	792	struct coro *prev, *next;
804	sv = SvRV (sv); \	793	};
805	\
806	if (SvTYPE (sv) == SVt_PVHV) \
807	{ \
808	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
809	\
810	if (!he) \
811	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
812	\
813	(sv) = SvRV (HeVAL(he)); \
814	} \
815	\
816	/* must also be changed inside Coro::Cont::yield */ \
817	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
818	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
819	\
820	} while(0)
821		794
822	#define SvSTATE(sv) (struct coro *)SvIV (sv)	795	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
823		796
		797	static void
		798	coro_state_destroy (struct coro *coro)
		799	{
		800	if (coro->refcnt--)
		801	return;
		802
		803	if (coro->mainstack && coro->mainstack != main_mainstack)
		804	{
		805	struct coro temp;
		806	Zero (&temp, 1, struct coro);
		807	temp.save = CORO_SAVE_ALL;
		808
		809	if (coro->flags & CF_RUNNING)
		810	croak ("FATAL: tried to destroy currently running coroutine");
		811
		812	save_perl (&temp);
		813	load_perl (coro);
		814
		815	coro_destroy_stacks ();
		816
		817	load_perl (&temp); /* this will get rid of defsv etc.. */
		818
		819	coro->mainstack = 0;
		820	}
		821
		822	cctx_destroy (coro->cctx);
		823	SvREFCNT_dec (coro->args);
		824	Safefree (coro);
		825	}
		826
824	static void	827	static int
		828	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		829	{
		830	struct coro *coro = (struct coro *)mg->mg_ptr;
		831	mg->mg_ptr = 0;
		832
		833	coro_state_destroy (coro);
		834
		835	return 0;
		836	}
		837
		838	static int
		839	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		840	{
		841	struct coro *coro = (struct coro *)mg->mg_ptr;
		842
		843	++coro->refcnt;
		844
		845	return 0;
		846	}
		847
		848	static MGVTBL coro_state_vtbl = {
		849	0, 0, 0, 0,
		850	coro_state_clear,
		851	0,
		852	#ifdef MGf_DUP
		853	coro_state_dup,
		854	#else
		855	# define MGf_DUP 0
		856	#endif
		857	};
		858
		859	static struct coro *
		860	SvSTATE (SV *coro)
		861	{
		862	HV *stash;
		863	MAGIC *mg;
		864
		865	if (SvROK (coro))
		866	coro = SvRV (coro);
		867
		868	stash = SvSTASH (coro);
		869	if (stash != coro_stash && stash != coro_state_stash)
		870	{
		871	/* very slow, but rare, check */
		872	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		873	croak ("Coro::State object required");
		874	}
		875
		876	mg = SvMAGIC (coro);
		877	assert (mg->mg_type == PERL_MAGIC_ext);
		878	return (struct coro *)mg->mg_ptr;
		879	}
		880
		881	static void
		882	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		883	{
		884	ta->prev = SvSTATE (prev_sv);
		885	ta->next = SvSTATE (next_sv);
		886	}
		887
		888	static void
825	api_transfer(pTHX_ SV *prev, SV *next, int flags)	889	api_transfer (SV *prev_sv, SV *next_sv)
826	{	890	{
827	SV_CORO (prev, "Coro::transfer");	891	struct transfer_args ta;
828	SV_CORO (next, "Coro::transfer");
829		892
830	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	893	prepare_transfer (&ta, prev_sv, next_sv);
		894	TRANSFER (ta);
		895	}
		896
		897	static int
		898	api_save (SV *coro_sv, int new_save)
		899	{
		900	struct coro *coro = SvSTATE (coro_sv);
		901	int old_save = coro->save;
		902
		903	if (new_save >= 0)
		904	coro->save = new_save;
		905
		906	return old_save;
831	}	907	}
832		908
833	/** Coro ********************************************************************/	909	/** Coro ********************************************************************/
834		910
835	#define PRIO_MAX 3	911	#define PRIO_MAX 3
…		…
838	#define PRIO_LOW -1	914	#define PRIO_LOW -1
839	#define PRIO_IDLE -3	915	#define PRIO_IDLE -3
840	#define PRIO_MIN -4	916	#define PRIO_MIN -4
841		917
842	/* for Coro.pm */	918	/* for Coro.pm */
843	static GV *coro_current, *coro_idle;	919	static SV *coro_current;
844	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	920	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
845	static int coro_nready;	921	static int coro_nready;
846		922
847	static void	923	static void
848	coro_enq (SV *sv)	924	coro_enq (SV *coro_sv)
849	{	925	{
850	if (SvTYPE (sv) == SVt_PVHV)
851	{
852	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
853	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
854
855	prio = prio > PRIO_MAX ? PRIO_MAX
856	: prio < PRIO_MIN ? PRIO_MIN
857	: prio;
858
859	av_push (coro_ready [prio - PRIO_MIN], sv);	926	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
860	coro_nready++;	927	coro_nready++;
861
862	return;
863	}
864
865	croak ("Coro::ready tried to enqueue something that is not a coroutine");
866	}	928	}
867		929
868	static SV *	930	static SV *
869	coro_deq (int min_prio)	931	coro_deq (int min_prio)
870	{	932	{
…		…
873	min_prio -= PRIO_MIN;	935	min_prio -= PRIO_MIN;
874	if (min_prio < 0)	936	if (min_prio < 0)
875	min_prio = 0;	937	min_prio = 0;
876		938
877	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	939	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
878	if (av_len (coro_ready[prio]) >= 0)	940	if (AvFILLp (coro_ready [prio]) >= 0)
879	{	941	{
880	coro_nready--;	942	coro_nready--;
881	return av_shift (coro_ready[prio]);	943	return av_shift (coro_ready [prio]);
882	}	944	}
883		945
884	return 0;	946	return 0;
885	}	947	}
886		948
887	static void	949	static int
888	api_ready (SV *coro)	950	api_ready (SV *coro_sv)
889	{	951	{
		952	struct coro *coro;
		953
890	if (SvROK (coro))	954	if (SvROK (coro_sv))
891	coro = SvRV (coro);	955	coro_sv = SvRV (coro_sv);
		956
		957	coro = SvSTATE (coro_sv);
		958
		959	if (coro->flags & CF_READY)
		960	return 0;
		961
		962	coro->flags |= CF_READY;
892		963
893	LOCK;	964	LOCK;
894	coro_enq (SvREFCNT_inc (coro));	965	coro_enq (SvREFCNT_inc (coro_sv));
895	UNLOCK;	966	UNLOCK;
		967
		968	return 1;
		969	}
		970
		971	static int
		972	api_is_ready (SV *coro_sv)
		973	{
		974	return !!SvSTATE (coro_sv)->flags & CF_READY;
		975	}
		976
		977	static void
		978	prepare_schedule (struct transfer_args *ta)
		979	{
		980	SV *prev, *next;
		981
		982	for (;;)
		983	{
		984	LOCK;
		985	next = coro_deq (PRIO_MIN);
		986	UNLOCK;
		987
		988	if (next)
		989	break;
		990
		991	{
		992	dSP;
		993
		994	ENTER;
		995	SAVETMPS;
		996
		997	PUSHMARK (SP);
		998	PUTBACK;
		999	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1000
		1001	FREETMPS;
		1002	LEAVE;
		1003	}
		1004	}
		1005
		1006	prev = SvRV (coro_current);
		1007	SvRV_set (coro_current, next);
		1008
		1009	/* free this only after the transfer */
		1010	LOCK;
		1011	free_coro_mortal ();
		1012	UNLOCK;
		1013	coro_mortal = prev;
		1014
		1015	assert (!SvROK(prev));//D
		1016	assert (!SvROK(next));//D
		1017
		1018	ta->prev = SvSTATE (prev);
		1019	ta->next = SvSTATE (next);
		1020
		1021	assert (ta->next->flags & CF_READY);
		1022	ta->next->flags &= ~CF_READY;
		1023	}
		1024
		1025	static void
		1026	prepare_cede (struct transfer_args *ta)
		1027	{
		1028	api_ready (coro_current);
		1029
		1030	prepare_schedule (ta);
896	}	1031	}
897		1032
898	static void	1033	static void
899	api_schedule (void)	1034	api_schedule (void)
900	{	1035	{
901	SV *prev, *next;	1036	struct transfer_args ta;
902		1037
903	LOCK;	1038	prepare_schedule (&ta);
904		1039	TRANSFER (ta);
905	prev = SvRV (GvSV (coro_current));
906	next = coro_deq (PRIO_MIN);
907
908	if (!next)
909	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
910
911	/* free this only after the transfer */
912	coro_mortal = prev;
913	SV_CORO (prev, "Coro::schedule");
914
915	SvRV (GvSV (coro_current)) = next;
916
917	SV_CORO (next, "Coro::schedule");
918
919	UNLOCK;
920
921	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
922	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
923	}	1040	}
924		1041
925	static void	1042	static void
926	api_cede (void)	1043	api_cede (void)
927	{	1044	{
928	LOCK;	1045	struct transfer_args ta;
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930	UNLOCK;
931		1046
932	api_schedule ();	1047	prepare_cede (&ta);
		1048	TRANSFER (ta);
933	}	1049	}
934		1050
935	MODULE = Coro::State PACKAGE = Coro::State	1051	MODULE = Coro::State PACKAGE = Coro::State
936		1052
937	PROTOTYPES: ENABLE	1053	PROTOTYPES: DISABLE
938		1054
939	BOOT:	1055	BOOT:
940	{ /* {} necessary for stoopid perl-5.6.x */	1056	{
941	#ifdef USE_ITHREADS	1057	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1058	MUTEX_INIT (&coro_mutex);
943	#endif	1059	#endif
		1060	BOOT_PAGESIZE;
944		1061
945	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
946	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
947	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1062	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
948		1063
949	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1064	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
950	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1065	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
951	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1066	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1067	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
952	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1068	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
953		1069
954	main_mainstack = PL_mainstack;	1070	main_mainstack = PL_mainstack;
955		1071
956	coroapi.ver = CORO_API_VERSION;	1072	coroapi.ver = CORO_API_VERSION;
957	coroapi.transfer = api_transfer;	1073	coroapi.transfer = api_transfer;
958	}
959		1074
960	Coro::State	1075	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	_newprocess(args)	1076	}
962	SV * args	1077
963	PROTOTYPE: $	1078	SV *
		1079	new (char *klass, ...)
964	CODE:	1080	CODE:
965	Coro__State coro;	1081	{
		1082	struct coro *coro;
		1083	HV *hv;
		1084	int i;
966		1085
967	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
968	croak ("Coro::State::_newprocess expects an arrayref");
969
970	Newz (0, coro, 1, struct coro);	1086	Newz (0, coro, 1, struct coro);
		1087	coro->args = newAV ();
		1088	coro->save = CORO_SAVE_ALL;
		1089	coro->flags = CF_NEW;
971		1090
972	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1091	hv = newHV ();
973	coro->mainstack = 0; /* actual work is done inside transfer */	1092	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
974	coro->stack = 0;	1093	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
975		1094
976	/* same as JMPENV_BOOTSTRAP */	1095	for (i = 1; i < items; i++)
977	/* we might be able to recycle start_env, but safe is safe */	1096	av_push (coro->args, newSVsv (ST (i)));
978	//Zero(&coro->start_env, 1, JMPENV);	1097	}
979	coro->start_env.je_ret = -1;
980	coro->start_env.je_mustcatch = TRUE;
981
982	RETVAL = coro;
983	OUTPUT:	1098	OUTPUT:
984	RETVAL	1099	RETVAL
985		1100
		1101	int
		1102	save (SV *coro, int new_save = -1)
		1103	CODE:
		1104	RETVAL = api_save (coro, new_save);
		1105	OUTPUT:
		1106	RETVAL
		1107
986	void	1108	void
987	transfer(prev, next, flags)	1109	_set_stacklevel (...)
988	SV *prev	1110	ALIAS:
989	SV *next	1111	Coro::State::transfer = 1
990	int flags	1112	Coro::schedule = 2
991	PROTOTYPE: @	1113	Coro::cede = 3
992	CODE:	1114	CODE:
993	PUTBACK;	1115	{
994	SV_CORO (next, "Coro::transfer");	1116	struct transfer_args ta;
995	SV_CORO (prev, "Coro::transfer");	1117
996	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1118	switch (ix)
997	SPAGAIN;	1119	{
		1120	case 0:
		1121	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1122	ta.next = 0;
		1123	break;
		1124
		1125	case 1:
		1126	if (items != 2)
		1127	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1128
		1129	prepare_transfer (&ta, ST (0), ST (1));
		1130	break;
		1131
		1132	case 2:
		1133	prepare_schedule (&ta);
		1134	break;
		1135
		1136	case 3:
		1137	prepare_cede (&ta);
		1138	break;
		1139	}
		1140
		1141	TRANSFER (ta);
		1142	}
998		1143
999	void	1144	void
1000	DESTROY(coro)	1145	_clone_state_from (SV *dst, SV *src)
1001	Coro::State coro	1146	CODE:
1002	CODE:	1147	{
		1148	struct coro *coro_src = SvSTATE (src);
1003		1149
1004	if (coro->mainstack && coro->mainstack != main_mainstack)	1150	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1005	{
1006	struct coro temp;
1007		1151
1008	PUTBACK;	1152	++coro_src->refcnt;
1009	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1153	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1010	LOAD(aTHX_ coro);	1154	}
1011	SPAGAIN;
1012
1013	destroy_stacks (aTHX);
1014
1015	LOAD((&temp)); /* this will get rid of defsv etc.. */
1016	SPAGAIN;
1017
1018	coro->mainstack = 0;
1019	}
1020
1021	deallocate_stack (coro);
1022	SvREFCNT_dec (coro->args);
1023	Safefree (coro);
1024		1155
1025	void	1156	void
1026	_exit(code)	1157	_exit (code)
1027	int code	1158	int code
1028	PROTOTYPE: $	1159	PROTOTYPE: $
1029	CODE:	1160	CODE:
1030	_exit (code);	1161	_exit (code);
1031		1162
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1163	int
		1164	cctx_count ()
		1165	CODE:
		1166	RETVAL = cctx_count;
		1167	OUTPUT:
		1168	RETVAL
1033		1169
1034	# this is slightly dirty (should expose a c-level api)	1170	int
1035		1171	cctx_idle ()
1036	void	1172	CODE:
1037	yield(...)	1173	RETVAL = cctx_idle;
1038	PROTOTYPE: @	1174	OUTPUT:
1039	CODE:	1175	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		1176
1062	MODULE = Coro::State PACKAGE = Coro	1177	MODULE = Coro::State PACKAGE = Coro
1063		1178
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1179	BOOT:
1067	{	1180	{
1068	int i;	1181	int i;
		1182
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1183	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1184
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1185	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1186	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1187	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1188	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1189	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1190	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1191
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1192	coro_current = get_sv ("Coro::current", FALSE);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1193	SvREADONLY_on (coro_current);
1080		1194
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1195	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1196	coro_ready[i] = newAV ();
1083		1197
1084	{	1198	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1199	SV *sv = perl_get_sv("Coro::API", 1);
1086		1200
1087	coroapi.schedule = api_schedule;	1201	coroapi.schedule = api_schedule;
		1202	coroapi.save = api_save;
1088	coroapi.cede = api_cede;	1203	coroapi.cede = api_cede;
1089	coroapi.ready = api_ready;	1204	coroapi.ready = api_ready;
		1205	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1206	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1207	coroapi.current = coro_current;
1092		1208
1093	GCoroAPI = &coroapi;	1209	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1210	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1211	SvREADONLY_on (sv);
1096	}	1212	}
1097	}	1213	}
1098		1214
1099	#if !PERL_MICRO
1100
1101	void	1215	void
1102	ready(self)	1216	_set_current (SV *current)
1103	SV * self
1104	PROTOTYPE: $	1217	PROTOTYPE: $
1105	CODE:	1218	CODE:
1106	api_ready (self);	1219	SvREFCNT_dec (SvRV (coro_current));
1107		1220	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1108	#endif
1109		1221
1110	int	1222	int
		1223	prio (Coro::State coro, int newprio = 0)
		1224	ALIAS:
		1225	nice = 1
		1226	CODE:
		1227	{
		1228	RETVAL = coro->prio;
		1229
		1230	if (items > 1)
		1231	{
		1232	if (ix)
		1233	newprio += coro->prio;
		1234
		1235	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1236	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1237
		1238	coro->prio = newprio;
		1239	}
		1240	}
		1241
		1242	SV *
		1243	ready (SV *self)
		1244	PROTOTYPE: $
		1245	CODE:
		1246	RETVAL = boolSV (api_ready (self));
		1247	OUTPUT:
		1248	RETVAL
		1249
		1250	SV *
		1251	is_ready (SV *self)
		1252	PROTOTYPE: $
		1253	CODE:
		1254	RETVAL = boolSV (api_is_ready (self));
		1255	OUTPUT:
		1256	RETVAL
		1257
		1258	int
1111	nready(...)	1259	nready (...)
1112	PROTOTYPE:	1260	PROTOTYPE:
1113	CODE:	1261	CODE:
1114	RETVAL = coro_nready;	1262	RETVAL = coro_nready;
1115	OUTPUT:	1263	OUTPUT:
1116	RETVAL	1264	RETVAL
1117		1265
		1266	MODULE = Coro::State PACKAGE = Coro::AIO
		1267
		1268	SV *
		1269	_get_state ()
		1270	CODE:
		1271	{
		1272	struct io_state *data;
		1273
		1274	RETVAL = newSV (sizeof (struct io_state));
		1275	data = (struct io_state *)SvPVX (RETVAL);
		1276	SvCUR_set (RETVAL, sizeof (struct io_state));
		1277	SvPOK_only (RETVAL);
		1278
		1279	data->errorno = errno;
		1280	data->laststype = PL_laststype;
		1281	data->laststatval = PL_laststatval;
		1282	data->statcache = PL_statcache;
		1283	}
		1284	OUTPUT:
		1285	RETVAL
		1286
1118	void	1287	void
1119	schedule(...)	1288	_set_state (char *data_)
1120	PROTOTYPE:	1289	PROTOTYPE: $
1121	CODE:	1290	CODE:
1122	api_schedule ();	1291	{
		1292	struct io_state *data = (void *)data_;
1123		1293
1124	void	1294	errno = data->errorno;
1125	cede(...)	1295	PL_laststype = data->laststype;
1126	PROTOTYPE:	1296	PL_laststatval = data->laststatval;
1127	CODE:	1297	PL_statcache = data->statcache;
1128	api_cede ();	1298	}
1129		1299

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