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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.124 by root, Tue Dec 5 12:50:04 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	#include <assert.h>
		46
		47	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		48	# undef STACKGUARD
		49	#endif
		50
		51	#ifndef STACKGUARD
		52	# define STACKGUARD 0
		53	#endif
31		54
32	#ifdef HAVE_MMAP	55	#ifdef HAVE_MMAP
33	# include <unistd.h>	56	# include <unistd.h>
34	# include <sys/mman.h>	57	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	58	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	60	# define MAP_ANONYMOUS MAP_ANON
38	# else	61	# else
39	# undef HAVE_MMAP	62	# undef HAVE_MMAP
40	# endif	63	# endif
41	# endif	64	# endif
		65	# include <limits.h>
		66	# ifndef PAGESIZE
		67	# define PAGESIZE pagesize
		68	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		69	static long pagesize;
		70	# else
		71	# define BOOT_PAGESIZE (void)0
42	#endif	72	# endif
43		73	#else
44	#define MAY_FLUSH /* increases codesize and is rarely used */	74	# define PAGESIZE 0
45		75	# define BOOT_PAGESIZE (void)0
46	#define SUB_INIT "Coro::State::initialize"	76	#endif
47	#define UCORO_STATE "_coro_state"
48		77
49	/* The next macro should declare a variable stacklevel that contains and approximation	78	/* 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	79	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	80	* and should be unique. */
		81	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	82	#define STACKLEVEL ((void *)&stacklevel)
53		83
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	84	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		85
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	86	#if __GNUC__ >= 3
		87	# define attribute(x) __attribute__(x)
		88	#else
		89	# define attribute(x)
		90	#endif
		91
		92	#define NOINLINE attribute ((noinline))
57		93
58	#include "CoroAPI.h"	94	#include "CoroAPI.h"
59		95
		96	#ifdef USE_ITHREADS
		97	static perl_mutex coro_mutex;
		98	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		99	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		100	#else
		101	# define LOCK (void)0
		102	# define UNLOCK (void)0
		103	#endif
		104
		105	struct io_state
		106	{
		107	int errorno;
		108	I32 laststype;
		109	int laststatval;
		110	Stat_t statcache;
		111	};
		112
60	static struct CoroAPI coroapi;	113	static struct CoroAPI coroapi;
		114	static AV *main_mainstack; /* used to differentiate between $main and others */
		115	static HV *coro_state_stash, *coro_stash;
		116	static SV *coro_mortal; /* will be freed after next transfer */
61		117
62	/* this is actually not only the c stack but also c registers etc... */	118	static struct coro_cctx *cctx_first;
		119	static int cctx_count, cctx_idle;
		120
		121	/* this is a structure representing a c-level coroutine */
63	typedef struct {	122	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	123	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		124
68	coro_context cctx;	125	/* the stack */
69
70	void *sptr;	126	void *sptr;
71	long ssize; /* positive == mmap, otherwise malloc */	127	long ssize; /* positive == mmap, otherwise malloc */
72	} coro_stack;
73		128
		129	/* cpu state */
		130	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		131	JMPENV *top_env;
		132	coro_context cctx;
		133
		134	int inuse;
		135
		136	#if USE_VALGRIND
		137	int valgrind_id;
		138	#endif
		139	} coro_cctx;
		140
		141	enum {
		142	CF_RUNNING = 0x0001, /* coroutine is running */
		143	CF_READY = 0x0002, /* coroutine is ready */
		144	CF_NEW = 0x0004, /* ahs never been switched to */
		145	};
		146
		147	/* this is a structure representing a perl-level coroutine */
74	struct coro {	148	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	149	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	150	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		151
121	/* data associated with this coroutine (initial args) */	152	/* data associated with this coroutine (initial args) */
122	AV *args;	153	AV *args;
		154	int refcnt;
		155	int save; /* CORO_SAVE flags */
		156	int flags; /* CF_ flags */
		157
		158	/* optionally saved, might be zero */
		159	AV *defav; /* @_ */
		160	SV *defsv; /* $_ */
		161	SV *errsv; /* $@ */
		162	SV *irssv; /* $/ */
		163	SV *irssv_sv; /* real $/ cache */
		164
		165	#define VAR(name,type) type name;
		166	# include "state.h"
		167	#undef VAR
		168
		169	/* coro process data */
		170	int prio;
123	};	171	};
124		172
125	typedef struct coro *Coro__State;	173	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	174	typedef struct coro *Coro__State_or_hashref;
127		175
128	static AV *main_mainstack; /* used to differentiate between $main and others */	176	static AV *
129	static HV *coro_state_stash;	177	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	{	178	{
139	AV *av;	179	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;	180	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		181
158	newpadlist = newAV ();	182	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	183	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	184	#if PERL_VERSION_ATLEAST (5,9,0)
		185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		186	#else
		187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		188	#endif
		189	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		190	--AvFILLp (padlist);
		191
		192	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	193	av_store (newpadlist, 1, (SV *)newpad);
162		194
163	av = newAV (); /* will be @_ */	195	return newpadlist;
164	av_extend (av, 0);	196	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		197
168	for (ix = fpad; ix > 0; ix--)	198	static void
		199	free_padlist (AV *padlist)
		200	{
		201	/* may be during global destruction */
		202	if (SvREFCNT (padlist))
169	{	203	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	204	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	205	while (i >= 0)
172	{	206	{
173	char *name = SvPVX (namesv); /* XXX */	207	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	208	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	209	{
178	else
179	{ /* our own lexical */
180	SV *sv;	210	SV *sv;
181	if (*name == '&')	211	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	212	SvREFCNT_dec (sv);
183	else if (*name == '@')	213
184	sv = (SV *) newAV ();	214	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	}	215	}
193	}	216	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	217
195	{	218	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	}	219	}
		220	}
205		221
206	#if 0 /* return -ENOTUNDERSTOOD */	222	static int
207	/* Now that vars are all in place, clone nested closures. */	223	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		224	{
		225	AV *padlist;
		226	AV *av = (AV *)mg->mg_obj;
208		227
209	for (ix = fpad; ix > 0; ix--) {	228	/* casting is fun. */
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	229	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	if (namesv	230	free_padlist (padlist);
212	&& namesv != &PL_sv_undef	231
213	&& !(SvFLAGS(namesv) & SVf_FAKE)	232	SvREFCNT_dec (av);
214	&& *SvPVX(namesv) == '&'	233
215	&& CvCLONE(ppad[ix]))	234	return 0;
216	{	235	}
217	CV *kid = cv_clone((CV*)ppad[ix]);	236
218	SvREFCNT_dec(ppad[ix]);	237	#define PERL_MAGIC_coro PERL_MAGIC_ext
219	CvCLONE_on(kid);	238
220	SvPADMY_on(kid);	239	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221	npad[ix] = (SV*)kid;	240
222	}	241	#define CORO_MAGIC(cv) \
		242	SvMAGIC (cv) \
		243	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		244	? SvMAGIC (cv) \
		245	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		246	: 0
		247
		248	/* the next two functions merely cache the padlists */
		249	static void
		250	get_padlist (CV *cv)
		251	{
		252	MAGIC *mg = CORO_MAGIC (cv);
		253	AV *av;
		254
		255	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		256	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		257	else
		258	{
		259	#if 0
		260	/* this is probably cleaner, but also slower? */
		261	CV *cp = Perl_cv_clone (cv);
		262	CvPADLIST (cv) = CvPADLIST (cp);
		263	CvPADLIST (cp) = 0;
		264	SvREFCNT_dec (cp);
		265	#else
		266	CvPADLIST (cv) = coro_clone_padlist (cv);
		267	#endif
		268	}
		269	}
		270
		271	static void
		272	put_padlist (CV *cv)
		273	{
		274	MAGIC *mg = CORO_MAGIC (cv);
		275	AV *av;
		276
		277	if (!mg)
		278	{
		279	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		280	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		281	mg->mg_virtual = &vtbl_coro;
		282	mg->mg_obj = (SV *)newAV ();
223	}	283	}
224	#endif
225		284
226	return newpadlist;	285	av = (AV *)mg->mg_obj;
227	}
228		286
229	#ifdef MAY_FLUSH	287	if (AvFILLp (av) >= AvMAX (av))
230	STATIC void	288	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		289
245	SvREFCNT_dec((SV*)padlist);	290	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
246	}
247	}	291	}
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		292
302	#define SB do {	293	#define SB do {
303	#define SE } while (0)	294	#define SE } while (0)
304		295
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	296	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
309		297
310	static void	298	static void
311	load_state(pTHX_ Coro__State c)	299	load_perl (Coro__State c)
312	{	300	{
313	PL_dowarn = c->dowarn;	301	#define VAR(name,type) PL_ ## name = c->name;
314	PL_in_eval = c->in_eval;	302	# include "state.h"
315		303	#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		304
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	307	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		308	if (c->irssv)
		309	{
		310	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		311	SvREFCNT_dec (c->irssv);
		312	else
		313	{
		314	REPLACE_SV (PL_rs, c->irssv);
		315	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		316	sv_setsv (c->irssv_sv, PL_rs);
		317	}
		318	}
347		319
348	{	320	{
349	dSP;	321	dSP;
350	CV *cv;	322	CV *cv;
351		323
352	/* now do the ugly restore mess */	324	/* now do the ugly restore mess */
353	while ((cv = (CV *)POPs))	325	while ((cv = (CV *)POPs))
354	{	326	{
355	AV *padlist = (AV *)POPs;
356
357	if (padlist)
358	{
359	put_padlist (cv); /* mark this padlist as available */	327	put_padlist (cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;	328	CvDEPTH (cv) = PTR2IV (POPs);
361	#ifdef USE_THREADS	329	CvPADLIST (cv) = (AV *)POPs;
362	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
363	#endif
364	}
365
366	++CvDEPTH(cv);
367	}	330	}
368		331
369	PUTBACK;	332	PUTBACK;
370	}	333	}
371	}	334	}
372		335
373	static void	336	static void
374	save_state(pTHX_ Coro__State c, int flags)	337	save_perl (Coro__State c)
375	{	338	{
376	{	339	{
377	dSP;	340	dSP;
378	I32 cxix = cxstack_ix;	341	I32 cxix = cxstack_ix;
379	PERL_CONTEXT *ccstk = cxstack;	342	PERL_CONTEXT *ccstk = cxstack;
…		…
390	{	353	{
391	while (cxix >= 0)	354	while (cxix >= 0)
392	{	355	{
393	PERL_CONTEXT *cx = &ccstk[cxix--];	356	PERL_CONTEXT *cx = &ccstk[cxix--];
394		357
395	if (CxTYPE(cx) == CXt_SUB)	358	if (CxTYPE (cx) == CXt_SUB)
396	{	359	{
397	CV *cv = cx->blk_sub.cv;	360	CV *cv = cx->blk_sub.cv;
		361
398	if (CvDEPTH(cv))	362	if (CvDEPTH (cv))
399	{	363	{
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);	364	EXTEND (SP, 3);
406		365
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));	366	PUSHs ((SV *)CvPADLIST (cv));
		367	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
415	PUSHs ((SV *)cv);	368	PUSHs ((SV *)cv);
416		369
		370	CvDEPTH (cv) = 0;
417	get_padlist (cv); /* this is a monster */	371	get_padlist (cv);
418	}	372	}
419	}	373	}
420	#ifdef CXt_FORMAT	374	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)	375	else if (CxTYPE (cx) == CXt_FORMAT)
422	{	376	{
423	/* I never used formats, so how should I know how these are implemented? */	377	/* I never used formats, so how should I know how these are implemented? */
424	/* my bold guess is as a simple, plain sub... */	378	/* my bold guess is as a simple, plain sub... */
425	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
426	}	380	}
…		…
436	}	390	}
437		391
438	PUTBACK;	392	PUTBACK;
439	}	393	}
440		394
441	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	395	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;	396	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	397	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		398	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
444		399
445	c->dowarn = PL_dowarn;	400	#define VAR(name,type)c->name = PL_ ## name;
446	c->in_eval = PL_in_eval;	401	# include "state.h"
447		402	#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	}	403	}
476		404
477	/*	405	/*
478	* allocate various perl stacks. This is an exact copy	406	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory	407	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need	408	* on the (sometimes correct) assumption that coroutines do
481	* a lot of stackspace.	409	* not usually need a lot of stackspace.
482	*/	410	*/
483	STATIC void	411	static void
484	coro_init_stacks (pTHX)	412	coro_init_stacks ()
485	{	413	{
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	414	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
487	PL_curstackinfo->si_type = PERLSI_MAIN;	415	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	416	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	417	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		418
491	PL_stack_base = AvARRAY(PL_curstack);	419	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	420	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	421	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		422
495	New(50,PL_tmps_stack,96,SV*);	423	New(50,PL_tmps_stack,128,SV*);
496	PL_tmps_floor = -1;	424	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	425	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	426	PL_tmps_max = 128;
499		427
500	New(54,PL_markstack,16,I32);	428	New(54,PL_markstack,32,I32);
501	PL_markstack_ptr = PL_markstack;	429	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	430	PL_markstack_max = PL_markstack + 32;
503		431
504	#ifdef SET_MARK_OFFSET	432	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;	433	SET_MARK_OFFSET;
506	#endif	434	#endif
507		435
508	New(54,PL_scopestack,16,I32);	436	New(54,PL_scopestack,32,I32);
509	PL_scopestack_ix = 0;	437	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	438	PL_scopestack_max = 32;
511		439
512	New(54,PL_savestack,96,ANY);	440	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	441	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	442	PL_savestack_max = 64;
515		443
		444	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	445	New(54,PL_retstack,16,OP*);
517	PL_retstack_ix = 0;	446	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	447	PL_retstack_max = 16;
		448	#endif
519	}	449	}
520		450
521	/*	451	/*
522	* destroy the stacks, the callchain etc...	452	* destroy the stacks, the callchain etc...
523	* still there is a memleak of 128 bytes...
524	*/	453	*/
525	STATIC void	454	static void
526	destroy_stacks(pTHX)	455	coro_destroy_stacks ()
527	{	456	{
528	if (!IN_DESTRUCT)	457	if (!IN_DESTRUCT)
529	{	458	{
530	/* is this ugly, I ask? */	459	/* is this ugly, I ask? */
531	while (PL_scopestack_ix)	460	LEAVE_SCOPE (0);
532	LEAVE;
533		461
534	/* sure it is, but more important: is it correct?? :/ */	462	/* 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;	463	FREETMPS;
		464
		465	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
537	}	466	}
538		467
539	while (PL_curstackinfo->si_next)	468	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;	469	PL_curstackinfo = PL_curstackinfo->si_next;
541		470
542	while (PL_curstackinfo)	471	while (PL_curstackinfo)
543	{	472	{
544	PERL_SI *p = PL_curstackinfo->si_prev;	473	PERL_SI *p = PL_curstackinfo->si_prev;
545		474
546	{	475	{ /*D*//*remove*/
547	dSP;	476	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	477	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */	478	PUTBACK; /* possibly superfluous */
550	}	479	}
551		480
552	if (!IN_DESTRUCT)	481	if (!IN_DESTRUCT)
553	{	482	{
554	dounwind(-1);	483	dounwind (-1);/*D*//*remove*/
555	SvREFCNT_dec(PL_curstackinfo->si_stack);	484	SvREFCNT_dec (PL_curstackinfo->si_stack);
556	}	485	}
557		486
558	Safefree(PL_curstackinfo->si_cxstack);	487	Safefree (PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);	488	Safefree (PL_curstackinfo);
560	PL_curstackinfo = p;	489	PL_curstackinfo = p;
561	}	490	}
562		491
563	Safefree(PL_tmps_stack);	492	Safefree (PL_tmps_stack);
564	Safefree(PL_markstack);	493	Safefree (PL_markstack);
565	Safefree(PL_scopestack);	494	Safefree (PL_scopestack);
566	Safefree(PL_savestack);	495	Safefree (PL_savestack);
		496	#if !PERL_VERSION_ATLEAST (5,9,0)
567	Safefree(PL_retstack);	497	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	498	#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	}	499	}
598		500
599	static void	501	static void
600	deallocate_stack (Coro__State ctx)	502	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	{	503	{
627	/*	504	/*
628	* emulate part of the perl startup here.	505	* emulate part of the perl startup here.
629	*/	506	*/
		507
		508	coro_init_stacks ();
		509
		510	PL_curcop = &PL_compiling;
		511	PL_in_eval = EVAL_NULL;
		512	PL_curpm = 0;
		513	PL_localizing = 0;
		514	PL_dirty = 0;
		515	PL_restartop = 0;
		516
		517	{
		518	dSP;
		519	LOGOP myop;
		520
		521	SvREFCNT_dec (GvAV (PL_defgv));
		522	GvAV (PL_defgv) = coro->args; coro->args = 0;
		523
		524	Zero (&myop, 1, LOGOP);
		525	myop.op_next = Nullop;
		526	myop.op_flags = OPf_WANT_VOID;
		527
		528	PUSHMARK (SP);
		529	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		530	PUTBACK;
		531	PL_op = (OP *)&myop;
		532	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		533	SPAGAIN;
		534	}
		535
		536	ENTER; /* necessary e.g. for dounwind */
		537	}
		538
		539	static void
		540	free_coro_mortal ()
		541	{
		542	if (coro_mortal)
		543	{
		544	SvREFCNT_dec (coro_mortal);
		545	coro_mortal = 0;
		546	}
		547	}
		548
		549	/* inject a fake call to Coro::State::_cctx_init into the execution */
		550	static void NOINLINE
		551	prepare_cctx (coro_cctx *cctx)
		552	{
630	dSP;	553	dSP;
631	Coro__State ctx = (Coro__State)arg;	554	LOGOP myop;
632	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
633		555
634	coro_init_stacks (aTHX);	556	Zero (&myop, 1, LOGOP);
635	/*PL_curcop = 0;*/	557	myop.op_next = PL_op;
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */	558	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
637	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args;
639		559
		560	PUSHMARK (SP);
		561	EXTEND (SP, 2);
		562	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		563	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		564	PUTBACK;
		565	PL_op = (OP *)&myop;
		566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640	SPAGAIN;	567	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	}	568	}
681		569
682	static void	570	static void
683	continue_coro (void *arg)	571	coro_run (void *arg)
684	{	572	{
		573	/* coro_run is the alternative tail of transfer(), so unlock here. */
		574	UNLOCK;
		575
685	/*	576	/*
686	* this is a _very_ stripped down perl interpreter ;)	577	* this is a _very_ stripped down perl interpreter ;)
687	*/	578	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;	579	PL_top_env = &PL_start_env;
692		580
693	ctx->cursp = 0;	581	/* inject call to cctx_init */
694	PL_op = PL_op->op_next;	582	prepare_cctx ((coro_cctx *)arg);
695	CALLRUNOPS(aTHX);
696		583
		584	/* somebody will hit me for both perl_run and PL_restartop */
		585	PL_restartop = PL_op;
		586	perl_run (PL_curinterp);
		587
		588	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
697	abort ();	589	abort ();
698	}	590	}
699		591
700	STATIC void	592	static coro_cctx *
		593	cctx_new ()
		594	{
		595	coro_cctx *cctx;
		596
		597	++cctx_count;
		598
		599	Newz (0, cctx, 1, coro_cctx);
		600
		601	#if HAVE_MMAP
		602
		603	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		604	/* mmap supposedly does allocate-on-write for us */
		605	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		606
		607	if (cctx->sptr == (void *)-1)
		608	{
		609	perror ("FATAL: unable to mmap stack for coroutine");
		610	_exit (EXIT_FAILURE);
		611	}
		612
		613	# if STACKGUARD
		614	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		615	# endif
		616
		617	#else
		618
		619	cctx->ssize = STACKSIZE * (long)sizeof (long);
		620	New (0, cctx->sptr, STACKSIZE, long);
		621
		622	if (!cctx->sptr)
		623	{
		624	perror ("FATAL: unable to malloc stack for coroutine");
		625	_exit (EXIT_FAILURE);
		626	}
		627
		628	#endif
		629
		630	#if USE_VALGRIND
		631	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		632	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		633	cctx->ssize + (char *)cctx->sptr
		634	);
		635	#endif
		636
		637	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		638
		639	return cctx;
		640	}
		641
		642	static void
		643	cctx_destroy (coro_cctx *cctx)
		644	{
		645	if (!cctx)
		646	return;
		647
		648	--cctx_count;
		649
		650	#if USE_VALGRIND
		651	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		652	#endif
		653
		654	#if HAVE_MMAP
		655	munmap (cctx->sptr, cctx->ssize);
		656	#else
		657	Safefree (cctx->sptr);
		658	#endif
		659
		660	Safefree (cctx);
		661	}
		662
		663	static coro_cctx *
		664	cctx_get ()
		665	{
		666	coro_cctx *cctx;
		667
		668	if (cctx_first)
		669	{
		670	cctx = cctx_first;
		671	cctx_first = cctx->next;
		672	--cctx_idle;
		673	}
		674	else
		675	{
		676	cctx = cctx_new ();
		677	PL_op = PL_op->op_next;
		678	}
		679
		680	return cctx;
		681	}
		682
		683	static void
		684	cctx_put (coro_cctx *cctx)
		685	{
		686	/* free another cctx if overlimit */
		687	if (cctx_idle >= MAX_IDLE_CCTX)
		688	{
		689	coro_cctx *first = cctx_first;
		690	cctx_first = first->next;
		691	--cctx_idle;
		692
		693	assert (!first->inuse);
		694	cctx_destroy (first);
		695	}
		696
		697	++cctx_idle;
		698	cctx->next = cctx_first;
		699	cctx_first = cctx;
		700	}
		701
		702	/* never call directly, always through the coro_state_transfer global variable */
		703	static void NOINLINE
701	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	704	transfer (struct coro *prev, struct coro *next)
702	{	705	{
703	dSTACKLEVEL;	706	dSTACKLEVEL;
704	static struct coro *xnext;
705		707
		708	/* sometimes transfer is only called to set idle_sp */
		709	if (!next)
		710	{
		711	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		712	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		713	}
706	if (prev != next)	714	else if (prev != next)
707	{	715	{
708	xnext = next;	716	coro_cctx *prev__cctx;
709		717
710	if (next->mainstack)	718	if (prev->flags & CF_NEW)
711	{	719	{
712	SAVE (prev, flags);	720	/* create a new empty context */
713	LOAD (next);	721	Newz (0, prev->cctx, 1, coro_cctx);
714		722	prev->cctx->inuse = 1;
715	/* mark this state as in-use */	723	prev->flags &= ~CF_NEW;
716	next->mainstack = 0;	724	prev->flags |= CF_RUNNING;
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	}	725	}
746	else if (next->tmps_ix == -2)	726
747	croak ("tried to transfer to running coroutine");	727	/*TODO: must not croak here */
		728	if (!prev->flags & CF_RUNNING)
		729	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		730
		731	if (next->flags & CF_RUNNING)
		732	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		733
		734	prev->flags &= ~CF_RUNNING;
		735	next->flags |= CF_RUNNING;
		736
		737	LOCK;
		738
		739	if (next->flags & CF_NEW)
		740	{
		741	/* need to start coroutine */
		742	next->flags &= ~CF_NEW;
		743	/* first get rid of the old state */
		744	save_perl (prev);
		745	/* setup coroutine call */
		746	setup_coro (next);
		747	/* need a new stack */
		748	assert (!next->cctx);
		749	}
748	else	750	else
749	{	751	{
750	SAVE (prev, -1); /* first get rid of the old state */	752	/* coroutine already started */
751		753	save_perl (prev);
752	if (flags & TRANSFER_SAVE_CCTXT)	754	load_perl (next);
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	}	755	}
781		756
782	/*	757	prev__cctx = prev->cctx;
783	* xnext is now either prev or next, depending on wether	758
784	* we switched the c stack or not. that's why I use a global	759	/* possibly "free" the cctx */
785	* variable, that should become thread-specific at one point.	760	if (prev__cctx->idle_sp == STACKLEVEL)
786	*/	761	{
787	xnext->cursp = stacklevel;	762	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		763	assert (PL_top_env == prev__cctx->top_env);
		764
		765	prev->cctx = 0;
		766
		767	cctx_put (prev__cctx);
		768	prev__cctx->inuse = 0;
		769	}
		770
		771	if (!next->cctx)
		772	{
		773	next->cctx = cctx_get ();
		774	assert (!next->cctx->inuse);
		775	next->cctx->inuse = 1;
		776	}
		777
		778	if (prev__cctx != next->cctx)
		779	{
		780	prev__cctx->top_env = PL_top_env;
		781	PL_top_env = next->cctx->top_env;
		782	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		783	}
		784
		785	free_coro_mortal ();
		786
		787	UNLOCK;
788	}	788	}
		789	}
789		790
790	if (coro_mortal)	791	struct transfer_args
		792	{
		793	struct coro *prev, *next;
		794	};
		795
		796	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		797
		798	static void
		799	coro_state_destroy (struct coro *coro)
		800	{
		801	if (coro->refcnt--)
		802	return;
		803
		804	if (coro->mainstack && coro->mainstack != main_mainstack)
791	{	805	{
792	SvREFCNT_dec (coro_mortal);	806	struct coro temp;
		807	Zero (&temp, 1, struct coro);
		808	temp.save = CORO_SAVE_ALL;
		809
		810	if (coro->flags & CF_RUNNING)
		811	croak ("FATAL: tried to destroy currently running coroutine");
		812
		813	save_perl (&temp);
		814	load_perl (coro);
		815
		816	coro_destroy_stacks ();
		817
		818	load_perl (&temp); /* this will get rid of defsv etc.. */
		819
793	coro_mortal = 0;	820	coro->mainstack = 0;
794	}	821	}
795	}
796		822
797	#define SV_CORO(sv,func) \	823	cctx_destroy (coro->cctx);
798	do { \	824	SvREFCNT_dec (coro->args);
799	if (SvROK (sv)) \	825	Safefree (coro);
800	sv = SvRV (sv); \	826	}
801	\
802	if (SvTYPE(sv) == SVt_PVHV) \
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		827
818	#define SvSTATE(sv) (struct coro *)SvIV (sv)
819
820	static void	828	static int
		829	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		830	{
		831	struct coro *coro = (struct coro *)mg->mg_ptr;
		832	mg->mg_ptr = 0;
		833
		834	coro_state_destroy (coro);
		835
		836	return 0;
		837	}
		838
		839	static int
		840	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		841	{
		842	struct coro *coro = (struct coro *)mg->mg_ptr;
		843
		844	++coro->refcnt;
		845
		846	return 0;
		847	}
		848
		849	static MGVTBL coro_state_vtbl = {
		850	0, 0, 0, 0,
		851	coro_state_clear,
		852	0,
		853	#ifdef MGf_DUP
		854	coro_state_dup,
		855	#else
		856	# define MGf_DUP 0
		857	#endif
		858	};
		859
		860	static struct coro *
		861	SvSTATE (SV *coro)
		862	{
		863	HV *stash;
		864	MAGIC *mg;
		865
		866	if (SvROK (coro))
		867	coro = SvRV (coro);
		868
		869	stash = SvSTASH (coro);
		870	if (stash != coro_stash && stash != coro_state_stash)
		871	{
		872	/* very slow, but rare, check */
		873	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		874	croak ("Coro::State object required");
		875	}
		876
		877	mg = SvMAGIC (coro);
		878	assert (mg->mg_type == PERL_MAGIC_ext);
		879	return (struct coro *)mg->mg_ptr;
		880	}
		881
		882	static void
		883	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		884	{
		885	ta->prev = SvSTATE (prev_sv);
		886	ta->next = SvSTATE (next_sv);
		887	}
		888
		889	static void
821	api_transfer(pTHX_ SV *prev, SV *next, int flags)	890	api_transfer (SV *prev_sv, SV *next_sv)
822	{	891	{
823	SV_CORO (prev, "Coro::transfer");	892	struct transfer_args ta;
824	SV_CORO (next, "Coro::transfer");
825		893
826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	894	prepare_transfer (&ta, prev_sv, next_sv);
		895	TRANSFER (ta);
		896	}
		897
		898	static int
		899	api_save (SV *coro_sv, int new_save)
		900	{
		901	struct coro *coro = SvSTATE (coro_sv);
		902	int old_save = coro->save;
		903
		904	if (new_save >= 0)
		905	coro->save = new_save;
		906
		907	return old_save;
827	}	908	}
828		909
829	/** Coro ********************************************************************/	910	/** Coro ********************************************************************/
830		911
831	#define PRIO_MAX 3	912	#define PRIO_MAX 3
…		…
834	#define PRIO_LOW -1	915	#define PRIO_LOW -1
835	#define PRIO_IDLE -3	916	#define PRIO_IDLE -3
836	#define PRIO_MIN -4	917	#define PRIO_MIN -4
837		918
838	/* for Coro.pm */	919	/* for Coro.pm */
839	static GV *coro_current, *coro_idle;	920	static SV *coro_current;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;	922	static int coro_nready;
842		923
843	static void	924	static void
844	coro_enq (SV *sv)	925	coro_enq (SV *coro_sv)
845	{	926	{
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);	927	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
856	coro_nready++;	928	coro_nready++;
857
858	return;
859	}
860
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");
862	}	929	}
863		930
864	static SV *	931	static SV *
865	coro_deq (int min_prio)	932	coro_deq (int min_prio)
866	{	933	{
…		…
869	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
870	if (min_prio < 0)	937	if (min_prio < 0)
871	min_prio = 0;	938	min_prio = 0;
872		939
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
875	{	942	{
876	coro_nready--;	943	coro_nready--;
877	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
878	}	945	}
879		946
880	return 0;	947	return 0;
881	}	948	}
882		949
883	static void	950	static int
884	api_ready (SV *coro)	951	api_ready (SV *coro_sv)
885	{	952	{
		953	struct coro *coro;
		954
886	if (SvROK (coro))	955	if (SvROK (coro_sv))
887	coro = SvRV (coro);	956	coro_sv = SvRV (coro_sv);
888		957
		958	coro = SvSTATE (coro_sv);
		959
		960	if (coro->flags & CF_READY)
		961	return 0;
		962
		963	#if 0 /* this is actually harmless */
		964	if (coro->flags & CF_RUNNING)
		965	croak ("Coro::ready called on currently running coroutine");
		966	#endif
		967
		968	coro->flags |= CF_READY;
		969
		970	LOCK;
889	coro_enq (SvREFCNT_inc (coro));	971	coro_enq (SvREFCNT_inc (coro_sv));
		972	UNLOCK;
		973
		974	return 1;
		975	}
		976
		977	static int
		978	api_is_ready (SV *coro_sv)
		979	{
		980	return !!SvSTATE (coro_sv)->flags & CF_READY;
		981	}
		982
		983	static void
		984	prepare_schedule (struct transfer_args *ta)
		985	{
		986	SV *prev, *next;
		987
		988	for (;;)
		989	{
		990	LOCK;
		991	next = coro_deq (PRIO_MIN);
		992	UNLOCK;
		993
		994	if (next)
		995	break;
		996
		997	{
		998	dSP;
		999
		1000	ENTER;
		1001	SAVETMPS;
		1002
		1003	PUSHMARK (SP);
		1004	PUTBACK;
		1005	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1006
		1007	FREETMPS;
		1008	LEAVE;
		1009	}
		1010	}
		1011
		1012	prev = SvRV (coro_current);
		1013	SvRV_set (coro_current, next);
		1014
		1015	/* free this only after the transfer */
		1016	LOCK;
		1017	free_coro_mortal ();
		1018	UNLOCK;
		1019	coro_mortal = prev;
		1020
		1021	assert (!SvROK(prev));//D
		1022	assert (!SvROK(next));//D
		1023
		1024	ta->prev = SvSTATE (prev);
		1025	ta->next = SvSTATE (next);
		1026
		1027	assert (ta->next->flags & CF_READY);
		1028	ta->next->flags &= ~CF_READY;
		1029	}
		1030
		1031	static void
		1032	prepare_cede (struct transfer_args *ta)
		1033	{
		1034	api_ready (coro_current);
		1035
		1036	prepare_schedule (ta);
890	}	1037	}
891		1038
892	static void	1039	static void
893	api_schedule (void)	1040	api_schedule (void)
894	{	1041	{
895	SV *prev, *next;	1042	struct transfer_args ta;
896		1043
897	prev = SvRV (GvSV (coro_current));	1044	prepare_schedule (&ta);
898	next = coro_deq (PRIO_MIN);	1045	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	}	1046	}
914		1047
915	static void	1048	static void
916	api_cede (void)	1049	api_cede (void)
917	{	1050	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1051	struct transfer_args ta;
919		1052
920	api_schedule ();	1053	prepare_cede (&ta);
		1054	TRANSFER (ta);
921	}	1055	}
922		1056
923	MODULE = Coro::State PACKAGE = Coro::State	1057	MODULE = Coro::State PACKAGE = Coro::State
924		1058
925	PROTOTYPES: ENABLE	1059	PROTOTYPES: DISABLE
926		1060
927	BOOT:	1061	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	1062	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1063	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1064	MUTEX_INIT (&coro_mutex);
		1065	#endif
		1066	BOOT_PAGESIZE;
		1067
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1068	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1069
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1070	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1071	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1072	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1073	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1074	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
937
938	if (!padlist_cache)
939	padlist_cache = newHV ();
940		1075
941	main_mainstack = PL_mainstack;	1076	main_mainstack = PL_mainstack;
942		1077
943	coroapi.ver = CORO_API_VERSION;	1078	coroapi.ver = CORO_API_VERSION;
944	coroapi.transfer = api_transfer;	1079	coroapi.transfer = api_transfer;
945	}
946		1080
947	Coro::State	1081	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
948	_newprocess(args)	1082	}
949	SV * args	1083
950	PROTOTYPE: $	1084	SV *
		1085	new (char *klass, ...)
951	CODE:	1086	CODE:
952	Coro__State coro;	1087	{
		1088	struct coro *coro;
		1089	HV *hv;
		1090	int i;
953		1091
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);	1092	Newz (0, coro, 1, struct coro);
		1093	coro->args = newAV ();
		1094	coro->save = CORO_SAVE_ALL;
		1095	coro->flags = CF_NEW;
958		1096
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1097	hv = newHV ();
960	coro->mainstack = 0; /* actual work is done inside transfer */	1098	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
961	coro->stack = 0;	1099	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
962		1100
963	/* same as JMPENV_BOOTSTRAP */	1101	for (i = 1; i < items; i++)
964	/* we might be able to recycle start_env, but safe is safe */	1102	av_push (coro->args, newSVsv (ST (i)));
965	Zero(&coro->start_env, 1, JMPENV);	1103	}
966	coro->start_env.je_ret = -1;
967	coro->start_env.je_mustcatch = TRUE;
968
969	RETVAL = coro;
970	OUTPUT:	1104	OUTPUT:
971	RETVAL	1105	RETVAL
972		1106
		1107	int
		1108	save (SV *coro, int new_save = -1)
		1109	CODE:
		1110	RETVAL = api_save (coro, new_save);
		1111	OUTPUT:
		1112	RETVAL
		1113
973	void	1114	void
974	transfer(prev, next, flags)	1115	_set_stacklevel (...)
975	SV *prev	1116	ALIAS:
976	SV *next	1117	Coro::State::transfer = 1
977	int flags	1118	Coro::schedule = 2
978	PROTOTYPE: @	1119	Coro::cede = 3
979	CODE:	1120	CODE:
980	PUTBACK;	1121	{
981	SV_CORO (next, "Coro::transfer");	1122	struct transfer_args ta;
982	SV_CORO (prev, "Coro::transfer");	1123
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1124	switch (ix)
984	SPAGAIN;	1125	{
		1126	case 0:
		1127	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1128	ta.next = 0;
		1129	break;
		1130
		1131	case 1:
		1132	if (items != 2)
		1133	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1134
		1135	prepare_transfer (&ta, ST (0), ST (1));
		1136	break;
		1137
		1138	case 2:
		1139	prepare_schedule (&ta);
		1140	break;
		1141
		1142	case 3:
		1143	prepare_cede (&ta);
		1144	break;
		1145	}
		1146
		1147	TRANSFER (ta);
		1148	}
985		1149
986	void	1150	void
987	DESTROY(coro)	1151	_clone_state_from (SV *dst, SV *src)
988	Coro::State coro	1152	CODE:
989	CODE:	1153	{
		1154	struct coro *coro_src = SvSTATE (src);
990		1155
991	if (coro->mainstack && coro->mainstack != main_mainstack)	1156	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
992	{
993	struct coro temp;
994		1157
995	PUTBACK;	1158	++coro_src->refcnt;
996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1159	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
997	LOAD(aTHX_ coro);	1160	}
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		1161
1012	void	1162	void
1013	flush()
1014	CODE:
1015	#ifdef MAY_FLUSH
1016	flush_padlist_cache ();
1017	#endif
1018
1019	void
1020	_exit(code)	1163	_exit (code)
1021	int code	1164	int code
1022	PROTOTYPE: $	1165	PROTOTYPE: $
1023	CODE:	1166	CODE:
1024	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1025	_exit (code);	1167	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1168
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1169	int
		1170	cctx_count ()
		1171	CODE:
		1172	RETVAL = cctx_count;
		1173	OUTPUT:
		1174	RETVAL
1033		1175
1034	# this is slightly dirty (should expose a c-level api)	1176	int
1035		1177	cctx_idle ()
1036	void	1178	CODE:
1037	yield(...)	1179	RETVAL = cctx_idle;
1038	PROTOTYPE: @	1180	OUTPUT:
1039	CODE:	1181	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		1182
1062	MODULE = Coro::State PACKAGE = Coro	1183	MODULE = Coro::State PACKAGE = Coro
1063		1184
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1185	BOOT:
1067	{	1186	{
1068	int i;	1187	int i;
		1188
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1189	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1190
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1191	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1192	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1193	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1194	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1195	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1196	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1197
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1198	coro_current = get_sv ("Coro::current", FALSE);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1199	SvREADONLY_on (coro_current);
1080		1200
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1201	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1202	coro_ready[i] = newAV ();
1083		1203
1084	{	1204	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1205	SV *sv = perl_get_sv("Coro::API", 1);
1086		1206
1087	coroapi.schedule = api_schedule;	1207	coroapi.schedule = api_schedule;
		1208	coroapi.save = api_save;
1088	coroapi.cede = api_cede;	1209	coroapi.cede = api_cede;
1089	coroapi.ready = api_ready;	1210	coroapi.ready = api_ready;
		1211	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1092		1214
1093	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1217	SvREADONLY_on (sv);
1096	}	1218	}
1097	}	1219	}
1098		1220
1099	void	1221	void
1100	ready(self)	1222	_set_current (SV *current)
1101	SV * self
1102	PROTOTYPE: $	1223	PROTOTYPE: $
1103	CODE:	1224	CODE:
1104	api_ready (self);	1225	SvREFCNT_dec (SvRV (coro_current));
		1226	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1105		1227
1106	int	1228	int
		1229	prio (Coro::State coro, int newprio = 0)
		1230	ALIAS:
		1231	nice = 1
		1232	CODE:
		1233	{
		1234	RETVAL = coro->prio;
		1235
		1236	if (items > 1)
		1237	{
		1238	if (ix)
		1239	newprio += coro->prio;
		1240
		1241	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1242	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1243
		1244	coro->prio = newprio;
		1245	}
		1246	}
		1247
		1248	SV *
		1249	ready (SV *self)
		1250	PROTOTYPE: $
		1251	CODE:
		1252	RETVAL = boolSV (api_ready (self));
		1253	OUTPUT:
		1254	RETVAL
		1255
		1256	SV *
		1257	is_ready (SV *self)
		1258	PROTOTYPE: $
		1259	CODE:
		1260	RETVAL = boolSV (api_is_ready (self));
		1261	OUTPUT:
		1262	RETVAL
		1263
		1264	int
1107	nready(...)	1265	nready (...)
1108	PROTOTYPE:	1266	PROTOTYPE:
1109	CODE:	1267	CODE:
1110	RETVAL = coro_nready;	1268	RETVAL = coro_nready;
1111	OUTPUT:	1269	OUTPUT:
1112	RETVAL	1270	RETVAL
1113		1271
		1272	MODULE = Coro::State PACKAGE = Coro::AIO
		1273
		1274	SV *
		1275	_get_state ()
		1276	CODE:
		1277	{
		1278	struct io_state *data;
		1279
		1280	RETVAL = newSV (sizeof (struct io_state));
		1281	data = (struct io_state *)SvPVX (RETVAL);
		1282	SvCUR_set (RETVAL, sizeof (struct io_state));
		1283	SvPOK_only (RETVAL);
		1284
		1285	data->errorno = errno;
		1286	data->laststype = PL_laststype;
		1287	data->laststatval = PL_laststatval;
		1288	data->statcache = PL_statcache;
		1289	}
		1290	OUTPUT:
		1291	RETVAL
		1292
1114	void	1293	void
1115	schedule(...)	1294	_set_state (char *data_)
1116	PROTOTYPE:	1295	PROTOTYPE: $
1117	CODE:	1296	CODE:
1118	api_schedule ();	1297	{
		1298	struct io_state *data = (void *)data_;
1119		1299
1120	void	1300	errno = data->errorno;
1121	cede(...)	1301	PL_laststype = data->laststype;
1122	PROTOTYPE:	1302	PL_laststatval = data->laststatval;
1123	CODE:	1303	PL_statcache = data->statcache;
1124	api_cede ();	1304	}
1125		1305

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