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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.45 by root, Tue May 27 01:15:31 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 "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
		9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	|| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
		23	# ifndef PL_ppaddr
		24	# define PL_ppaddr ppaddr
		25	# endif
		26	# ifndef call_sv
		27	# define call_sv perl_call_sv
		28	# endif
		29	# ifndef get_sv
		30	# define get_sv perl_get_sv
		31	# endif
		32	# ifndef get_cv
		33	# define get_cv perl_get_cv
		34	# endif
		35	# ifndef IS_PADGV
		36	# define IS_PADGV(v) 0
		37	# endif
		38	# ifndef IS_PADCONST
		39	# define IS_PADCONST(v) 0
		40	# endif
		41	#endif
		42
7	#include <signal.h>	43	#include <stdio.h>
		44	#include <errno.h>
		45	#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
8		54
9	#ifdef HAVE_MMAP	55	#ifdef HAVE_MMAP
10	# include <unistd.h>	56	# include <unistd.h>
11	# include <sys/mman.h>	57	# include <sys/mman.h>
12	# ifndef MAP_ANONYMOUS	58	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS MAP_ANON	60	# define MAP_ANONYMOUS MAP_ANON
15	# else	61	# else
16	# undef HAVE_MMAP	62	# undef HAVE_MMAP
17	# endif	63	# endif
18	# 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
19	#endif	72	# endif
20		73	#else
21	#define MAY_FLUSH /* increases codesize and is rarely used */	74	# define PAGESIZE 0
22		75	# define BOOT_PAGESIZE (void)0
23	#define SUB_INIT "Coro::State::initialize"	76	#endif
24	#define UCORO_STATE "_coro_state"
25		77
26	/* 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
27	* 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
28	* and should be unique. */	80	* and should be unique. */
		81	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	82	#define STACKLEVEL ((void *)&stacklevel)
30		83
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	84	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		85
33	#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))
34		93
35	#include "CoroAPI.h"	94	#include "CoroAPI.h"
36		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
37	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 */
38		117
39	/* 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 */
40	typedef struct {	122	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	123	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		124
45	coro_context cctx;	125	/* the stack */
46
47	void *sptr;	126	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	127	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		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 */
51	struct coro {	148	struct coro {
52	/* the top-level JMPENV for each coroutine, needed to catch dies. */	149	/* the c coroutine allocated to this perl coroutine, if any */
53	JMPENV start_env;	150	coro_cctx *cctx;
54
55	/* the optional C context */
56	coro_stack *stack;
57	void *cursp;
58	int gencnt;
59
60	/* optionally saved, might be zero */
61	AV *defav;
62	SV *defsv;
63	SV *errsv;
64
65	/* saved global state not related to stacks */
66	U8 dowarn;
67	I32 in_eval;
68
69	/* the stacks and related info (callchain etc..) */
70	PERL_SI *curstackinfo;
71	AV *curstack;
72	AV *mainstack;
73	SV **stack_sp;
74	OP *op;
75	SV **curpad;
76	AV *comppad;
77	SV **stack_base;
78	SV **stack_max;
79	SV **tmps_stack;
80	I32 tmps_floor;
81	I32 tmps_ix;
82	I32 tmps_max;
83	I32 *markstack;
84	I32 *markstack_ptr;
85	I32 *markstack_max;
86	I32 *scopestack;
87	I32 scopestack_ix;
88	I32 scopestack_max;
89	ANY *savestack;
90	I32 savestack_ix;
91	I32 savestack_max;
92	OP **retstack;
93	I32 retstack_ix;
94	I32 retstack_max;
95	COP *curcop;
96	JMPENV *top_env;
97		151
98	/* data associated with this coroutine (initial args) */	152	/* data associated with this coroutine (initial args) */
99	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;
100	};	171	};
101		172
102	typedef struct coro *Coro__State;	173	typedef struct coro *Coro__State;
103	typedef struct coro *Coro__State_or_hashref;	174	typedef struct coro *Coro__State_or_hashref;
104		175
105	static AV *main_mainstack; /* used to differentiate between $main and others */	176	static AV *
106	static HV *coro_state_stash;	177	coro_clone_padlist (CV *cv)
107	static SV *ucoro_state_sv;
108	static U32 ucoro_state_hash;
109	static HV *padlist_cache;
110	static SV *coro_mortal; /* will be freed after next transfer */
111
112	/* mostly copied from op.c:cv_clone2 */
113	STATIC AV *
114	clone_padlist (AV *protopadlist)
115	{	178	{
116	AV *av;	179	AV *padlist = CvPADLIST (cv);
117	I32 ix;
118	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
119	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
120	SV **pname = AvARRAY (protopad_name);
121	SV **ppad = AvARRAY (protopad);
122	I32 fname = AvFILLp (protopad_name);
123	I32 fpad = AvFILLp (protopad);
124	AV *newpadlist, *newpad_name, *newpad;	180	AV *newpadlist, *newpad;
125	SV **npad;
126
127	newpad_name = newAV ();
128	for (ix = fname; ix >= 0; ix--)
129	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
130
131	newpad = newAV ();
132	av_fill (newpad, AvFILLp (protopad));
133	npad = AvARRAY (newpad);
134		181
135	newpadlist = newAV ();	182	newpadlist = newAV ();
136	AvREAL_off (newpadlist);	183	AvREAL_off (newpadlist);
137	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)));
138	av_store (newpadlist, 1, (SV *) newpad);	193	av_store (newpadlist, 1, (SV *)newpad);
139		194
140	av = newAV (); /* will be @_ */	195	return newpadlist;
141	av_extend (av, 0);	196	}
142	av_store (newpad, 0, (SV *) av);
143	AvFLAGS (av) = AVf_REIFY;
144		197
145	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))
146	{	203	{
147	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	204	I32 i = AvFILLp (padlist);
148	if (namesv && namesv != &PL_sv_undef)	205	while (i >= 0)
149	{	206	{
150	char *name = SvPVX (namesv); /* XXX */	207	SV **svp = av_fetch (padlist, i--, FALSE);
151	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	208	if (svp)
152	{ /* lexical from outside? */
153	npad[ix] = SvREFCNT_inc (ppad[ix]);
154	}	209	{
155	else
156	{ /* our own lexical */
157	SV *sv;	210	SV *sv;
158	if (*name == '&')	211	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
159	sv = SvREFCNT_inc (ppad[ix]);	212	SvREFCNT_dec (sv);
160	else if (*name == '@')	213
161	sv = (SV *) newAV ();	214	SvREFCNT_dec (*svp);
162	else if (*name == '%')
163	sv = (SV *) newHV ();
164	else
165	sv = NEWSV (0, 0);
166	if (!SvPADBUSY (sv))
167	SvPADMY_on (sv);
168	npad[ix] = sv;
169	}	215	}
170	}	216	}
171	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	217
172	{	218	SvREFCNT_dec ((SV*)padlist);
173	npad[ix] = SvREFCNT_inc (ppad[ix]);
174	}
175	else
176	{
177	SV *sv = NEWSV (0, 0);
178	SvPADTMP_on (sv);
179	npad[ix] = sv;
180	}
181	}	219	}
		220	}
182		221
183	#if 0 /* return -ENOTUNDERSTOOD */	222	static int
184	/* 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;
185		227
186	for (ix = fpad; ix > 0; ix--) {	228	/* casting is fun. */
187	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	229	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
188	if (namesv	230	free_padlist (padlist);
189	&& namesv != &PL_sv_undef	231
190	&& !(SvFLAGS(namesv) & SVf_FAKE)	232	SvREFCNT_dec (av);
191	&& *SvPVX(namesv) == '&'	233
192	&& CvCLONE(ppad[ix]))	234	return 0;
193	{	235	}
194	CV *kid = cv_clone((CV*)ppad[ix]);	236
195	SvREFCNT_dec(ppad[ix]);	237	#define PERL_MAGIC_coro PERL_MAGIC_ext
196	CvCLONE_on(kid);	238
197	SvPADMY_on(kid);	239	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
198	npad[ix] = (SV*)kid;	240
199	}	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 ();
200	}	283	}
201	#endif
202		284
203	return newpadlist;	285	av = (AV *)mg->mg_obj;
204	}
205		286
206	#ifdef MAY_FLUSH	287	if (AvFILLp (av) >= AvMAX (av))
207	STATIC void	288	av_extend (av, AvMAX (av) + 1);
208	free_padlist (AV *padlist)
209	{
210	/* may be during global destruction */
211	if (SvREFCNT(padlist))
212	{
213	I32 i = AvFILLp(padlist);
214	while (i >= 0)
215	{
216	SV **svp = av_fetch(padlist, i--, FALSE);
217	SV *sv = svp ? *svp : Nullsv;
218	if (sv)
219	SvREFCNT_dec(sv);
220	}
221		289
222	SvREFCNT_dec((SV*)padlist);	290	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
223	}
224	}	291	}
225	#endif
226
227	/* the next two functions merely cache the padlists */
228	STATIC void
229	get_padlist (CV *cv)
230	{
231	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
232
233	if (he && AvFILLp ((AV *)*he) >= 0)
234	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
235	else
236	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
237	}
238
239	STATIC void
240	put_padlist (CV *cv)
241	{
242	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
243
244	if (SvTYPE (*he) != SVt_PVAV)
245	{
246	SvREFCNT_dec (*he);
247	*he = (SV *)newAV ();
248	}
249
250	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
251	}
252
253	#ifdef MAY_FLUSH
254	STATIC void
255	flush_padlist_cache ()
256	{
257	HV *hv = padlist_cache;
258	padlist_cache = newHV ();
259
260	if (hv_iterinit (hv))
261	{
262	HE *he;
263	AV *padlist;
264
265	while (!!(he = hv_iternext (hv)))
266	{
267	AV *av = (AV *)HeVAL(he);
268
269	/* casting is fun. */
270	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
271	free_padlist (padlist);
272	}
273	}
274
275	SvREFCNT_dec (hv);
276	}
277	#endif
278		292
279	#define SB do {	293	#define SB do {
280	#define SE } while (0)	294	#define SE } while (0)
281		295
282	#define LOAD(state) load_state(aTHX_ (state));
283	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
284
285	#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
286		297
287	static void	298	static void
288	load_state(pTHX_ Coro__State c)	299	load_perl (Coro__State c)
289	{	300	{
290	PL_dowarn = c->dowarn;	301	#define VAR(name,type) PL_ ## name = c->name;
291	PL_in_eval = c->in_eval;	302	# include "state.h"
292		303	#undef VAR
293	PL_curstackinfo = c->curstackinfo;
294	PL_curstack = c->curstack;
295	PL_mainstack = c->mainstack;
296	PL_stack_sp = c->stack_sp;
297	PL_op = c->op;
298	PL_curpad = c->curpad;
299	PL_comppad = c->comppad;
300	PL_stack_base = c->stack_base;
301	PL_stack_max = c->stack_max;
302	PL_tmps_stack = c->tmps_stack;
303	PL_tmps_floor = c->tmps_floor;
304	PL_tmps_ix = c->tmps_ix;
305	PL_tmps_max = c->tmps_max;
306	PL_markstack = c->markstack;
307	PL_markstack_ptr = c->markstack_ptr;
308	PL_markstack_max = c->markstack_max;
309	PL_scopestack = c->scopestack;
310	PL_scopestack_ix = c->scopestack_ix;
311	PL_scopestack_max = c->scopestack_max;
312	PL_savestack = c->savestack;
313	PL_savestack_ix = c->savestack_ix;
314	PL_savestack_max = c->savestack_max;
315	PL_retstack = c->retstack;
316	PL_retstack_ix = c->retstack_ix;
317	PL_retstack_max = c->retstack_max;
318	PL_curcop = c->curcop;
319	PL_top_env = c->top_env;
320		304
321	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
322	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
323	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	}
324		319
325	{	320	{
326	dSP;	321	dSP;
327	CV *cv;	322	CV *cv;
328		323
329	/* now do the ugly restore mess */	324	/* now do the ugly restore mess */
330	while ((cv = (CV *)POPs))	325	while ((cv = (CV *)POPs))
331	{	326	{
332	AV *padlist = (AV *)POPs;
333
334	if (padlist)
335	{
336	put_padlist (cv); /* mark this padlist as available */	327	put_padlist (cv); /* mark this padlist as available */
337	CvPADLIST(cv) = padlist;	328	CvDEPTH (cv) = PTR2IV (POPs);
338	#ifdef USE_THREADS	329	CvPADLIST (cv) = (AV *)POPs;
339	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
340	#endif
341	}
342
343	++CvDEPTH(cv);
344	}	330	}
345		331
346	PUTBACK;	332	PUTBACK;
347	}	333	}
348	}	334	}
349		335
350	static void	336	static void
351	save_state(pTHX_ Coro__State c, int flags)	337	save_perl (Coro__State c)
352	{	338	{
353	{	339	{
354	dSP;	340	dSP;
355	I32 cxix = cxstack_ix;	341	I32 cxix = cxstack_ix;
356	PERL_CONTEXT *ccstk = cxstack;	342	PERL_CONTEXT *ccstk = cxstack;
…		…
367	{	353	{
368	while (cxix >= 0)	354	while (cxix >= 0)
369	{	355	{
370	PERL_CONTEXT *cx = &ccstk[cxix--];	356	PERL_CONTEXT *cx = &ccstk[cxix--];
371		357
372	if (CxTYPE(cx) == CXt_SUB)	358	if (CxTYPE (cx) == CXt_SUB)
373	{	359	{
374	CV *cv = cx->blk_sub.cv;	360	CV *cv = cx->blk_sub.cv;
		361
375	if (CvDEPTH(cv))	362	if (CvDEPTH (cv))
376	{	363	{
377	#ifdef USE_THREADS
378	/*XPUSHs ((SV *)CvOWNER(cv));*/
379	/*CvOWNER(cv) = 0;*/
380	/*error must unlock this cv etc.. etc...*/
381	#endif
382	EXTEND (SP, CvDEPTH(cv)*2);	364	EXTEND (SP, 3);
383		365
384	while (--CvDEPTH(cv))
385	{
386	/* this tells the restore code to increment CvDEPTH */
387	PUSHs (Nullsv);
388	PUSHs ((SV *)cv);
389	}
390
391	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST (cv));
		367	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
392	PUSHs ((SV *)cv);	368	PUSHs ((SV *)cv);
393		369
		370	CvDEPTH (cv) = 0;
394	get_padlist (cv); /* this is a monster */	371	get_padlist (cv);
395	}	372	}
396	}	373	}
		374	#ifdef CXt_FORMAT
397	else if (CxTYPE(cx) == CXt_FORMAT)	375	else if (CxTYPE (cx) == CXt_FORMAT)
398	{	376	{
399	/* 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? */
400	/* my bold guess is as a simple, plain sub... */	378	/* my bold guess is as a simple, plain sub... */
401	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");
402	}	380	}
		381	#endif
403	}	382	}
404		383
405	if (top_si->si_type == PERLSI_MAIN)	384	if (top_si->si_type == PERLSI_MAIN)
406	break;	385	break;
407		386
…		…
411	}	390	}
412		391
413	PUTBACK;	392	PUTBACK;
414	}	393	}
415		394
416	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;
417	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	396	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
418	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;
419		399
420	c->dowarn = PL_dowarn;	400	#define VAR(name,type)c->name = PL_ ## name;
421	c->in_eval = PL_in_eval;	401	# include "state.h"
422		402	#undef VAR
423	c->curstackinfo = PL_curstackinfo;
424	c->curstack = PL_curstack;
425	c->mainstack = PL_mainstack;
426	c->stack_sp = PL_stack_sp;
427	c->op = PL_op;
428	c->curpad = PL_curpad;
429	c->comppad = PL_comppad;
430	c->stack_base = PL_stack_base;
431	c->stack_max = PL_stack_max;
432	c->tmps_stack = PL_tmps_stack;
433	c->tmps_floor = PL_tmps_floor;
434	c->tmps_ix = PL_tmps_ix;
435	c->tmps_max = PL_tmps_max;
436	c->markstack = PL_markstack;
437	c->markstack_ptr = PL_markstack_ptr;
438	c->markstack_max = PL_markstack_max;
439	c->scopestack = PL_scopestack;
440	c->scopestack_ix = PL_scopestack_ix;
441	c->scopestack_max = PL_scopestack_max;
442	c->savestack = PL_savestack;
443	c->savestack_ix = PL_savestack_ix;
444	c->savestack_max = PL_savestack_max;
445	c->retstack = PL_retstack;
446	c->retstack_ix = PL_retstack_ix;
447	c->retstack_max = PL_retstack_max;
448	c->curcop = PL_curcop;
449	c->top_env = PL_top_env;
450	}	403	}
451		404
452	/*	405	/*
453	* allocate various perl stacks. This is an exact copy	406	* allocate various perl stacks. This is an exact copy
454	* of perl.c:init_stacks, except that it uses less memory	407	* of perl.c:init_stacks, except that it uses less memory
455	* on the assumption that coroutines do not usually need	408	* on the (sometimes correct) assumption that coroutines do
456	* a lot of stackspace.	409	* not usually need a lot of stackspace.
457	*/	410	*/
458	STATIC void	411	static void
459	coro_init_stacks (pTHX)	412	coro_init_stacks ()
460	{	413	{
461	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	414	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
462	PL_curstackinfo->si_type = PERLSI_MAIN;	415	PL_curstackinfo->si_type = PERLSI_MAIN;
463	PL_curstack = PL_curstackinfo->si_stack;	416	PL_curstack = PL_curstackinfo->si_stack;
464	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	417	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
465		418
466	PL_stack_base = AvARRAY(PL_curstack);	419	PL_stack_base = AvARRAY(PL_curstack);
467	PL_stack_sp = PL_stack_base;	420	PL_stack_sp = PL_stack_base;
468	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	421	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
469		422
470	New(50,PL_tmps_stack,96,SV*);	423	New(50,PL_tmps_stack,128,SV*);
471	PL_tmps_floor = -1;	424	PL_tmps_floor = -1;
472	PL_tmps_ix = -1;	425	PL_tmps_ix = -1;
473	PL_tmps_max = 96;	426	PL_tmps_max = 128;
474		427
475	New(54,PL_markstack,16,I32);	428	New(54,PL_markstack,32,I32);
476	PL_markstack_ptr = PL_markstack;	429	PL_markstack_ptr = PL_markstack;
477	PL_markstack_max = PL_markstack + 16;	430	PL_markstack_max = PL_markstack + 32;
478		431
		432	#ifdef SET_MARK_OFFSET
479	SET_MARK_OFFSET;	433	SET_MARK_OFFSET;
		434	#endif
480		435
481	New(54,PL_scopestack,16,I32);	436	New(54,PL_scopestack,32,I32);
482	PL_scopestack_ix = 0;	437	PL_scopestack_ix = 0;
483	PL_scopestack_max = 16;	438	PL_scopestack_max = 32;
484		439
485	New(54,PL_savestack,96,ANY);	440	New(54,PL_savestack,64,ANY);
486	PL_savestack_ix = 0;	441	PL_savestack_ix = 0;
487	PL_savestack_max = 96;	442	PL_savestack_max = 64;
488		443
		444	#if !PERL_VERSION_ATLEAST (5,9,0)
489	New(54,PL_retstack,8,OP*);	445	New(54,PL_retstack,16,OP*);
490	PL_retstack_ix = 0;	446	PL_retstack_ix = 0;
491	PL_retstack_max = 8;	447	PL_retstack_max = 16;
		448	#endif
492	}	449	}
493		450
494	/*	451	/*
495	* destroy the stacks, the callchain etc...	452	* destroy the stacks, the callchain etc...
496	* still there is a memleak of 128 bytes...
497	*/	453	*/
498	STATIC void	454	static void
499	destroy_stacks(pTHX)	455	coro_destroy_stacks ()
500	{	456	{
501	if (!IN_DESTRUCT)	457	if (!IN_DESTRUCT)
502	{	458	{
503	/* is this ugly, I ask? */	459	/* is this ugly, I ask? */
504	while (PL_scopestack_ix)	460	LEAVE_SCOPE (0);
505	LEAVE;
506		461
507	/* sure it is, but more important: is it correct?? :/ */	462	/* sure it is, but more important: is it correct?? :/ */
508	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
509	FREETMPS;	463	FREETMPS;
		464
		465	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
510	}	466	}
511		467
512	while (PL_curstackinfo->si_next)	468	while (PL_curstackinfo->si_next)
513	PL_curstackinfo = PL_curstackinfo->si_next;	469	PL_curstackinfo = PL_curstackinfo->si_next;
514		470
515	while (PL_curstackinfo)	471	while (PL_curstackinfo)
516	{	472	{
517	PERL_SI *p = PL_curstackinfo->si_prev;	473	PERL_SI *p = PL_curstackinfo->si_prev;
518		474
519	{	475	{ /*D*//*remove*/
520	dSP;	476	dSP;
521	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	477	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
522	PUTBACK; /* possibly superfluous */	478	PUTBACK; /* possibly superfluous */
523	}	479	}
524		480
525	if (!IN_DESTRUCT)	481	if (!IN_DESTRUCT)
526	{	482	{
527	dounwind(-1);	483	dounwind (-1);/*D*//*remove*/
528	SvREFCNT_dec(PL_curstackinfo->si_stack);	484	SvREFCNT_dec (PL_curstackinfo->si_stack);
529	}	485	}
530		486
531	Safefree(PL_curstackinfo->si_cxstack);	487	Safefree (PL_curstackinfo->si_cxstack);
532	Safefree(PL_curstackinfo);	488	Safefree (PL_curstackinfo);
533	PL_curstackinfo = p;	489	PL_curstackinfo = p;
534	}	490	}
535		491
536	Safefree(PL_tmps_stack);	492	Safefree (PL_tmps_stack);
537	Safefree(PL_markstack);	493	Safefree (PL_markstack);
538	Safefree(PL_scopestack);	494	Safefree (PL_scopestack);
539	Safefree(PL_savestack);	495	Safefree (PL_savestack);
		496	#if !PERL_VERSION_ATLEAST (5,9,0)
540	Safefree(PL_retstack);	497	Safefree (PL_retstack);
541	}
542
543	static void
544	allocate_stack (Coro__State ctx, int alloc)
545	{
546	coro_stack *stack;
547
548	New (0, stack, 1, coro_stack);
549
550	stack->refcnt = 1;
551	stack->usecnt = 1;
552	stack->gencnt = ctx->gencnt = 0;
553	if (alloc)
554	{
555	#if HAVE_MMAP
556	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
558	if (stack->sptr == (void *)-1)
559	#endif	498	#endif
560	{
561	/*FIXME*//*D*//* reasonable stack size! */
562	stack->ssize = -4096 * sizeof (long);
563	New (0, stack->sptr, 4096, long);
564	}
565	}
566	else
567	stack->sptr = 0;
568
569	ctx->stack = stack;
570	}	499	}
571		500
572	static void	501	static void
573	deallocate_stack (Coro__State ctx)	502	setup_coro (struct coro *coro)
574	{
575	coro_stack *stack = ctx->stack;
576
577	ctx->stack = 0;
578
579	if (stack)
580	{
581	if (!--stack->refcnt)
582	{
583	#ifdef HAVE_MMAP
584	if (stack->ssize > 0 && stack->sptr)
585	munmap (stack->sptr, stack->ssize);
586	else
587	#else
588	Safefree (stack->sptr);
589	#endif
590	Safefree (stack);
591	}
592	else if (ctx->gencnt == stack->gencnt)
593	--stack->usecnt;
594	}
595	}
596
597	static void
598	setup_coro (void *arg)
599	{	503	{
600	/*	504	/*
601	* emulate part of the perl startup here.	505	* emulate part of the perl startup here.
602	*/	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	{
603	dSP;	553	dSP;
604	Coro__State ctx = (Coro__State)arg;	554	LOGOP myop;
605	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606		555
607	coro_init_stacks (aTHX);	556	Zero (&myop, 1, LOGOP);
608	/*PL_curcop = 0;*/	557	myop.op_next = PL_op;
609	/*PL_in_eval = PL_in_eval;*/ /* inherit */	558	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
610	SvREFCNT_dec (GvAV (PL_defgv));
611	GvAV (PL_defgv) = ctx->args;
612		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);
613	SPAGAIN;	567	SPAGAIN;
614
615	if (ctx->stack)
616	{
617	ctx->cursp = 0;
618
619	PUSHMARK(SP);
620	PUTBACK;
621	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623	if (SvTRUE (ERRSV))
624	croak (NULL);
625	else
626	croak ("FATAL: CCTXT coroutine returned!");
627	}
628	else
629	{
630	UNOP myop;
631
632	PL_op = (OP *)&myop;
633
634	Zero(&myop, 1, UNOP);
635	myop.op_next = Nullop;
636	myop.op_flags = OPf_WANT_VOID;
637
638	PUSHMARK(SP);
639	XPUSHs (sub_init);
640	/*
641	* the next line is slightly wrong, as PL_op->op_next
642	* is actually being executed so we skip the first op.
643	* that doesn't matter, though, since it is only
644	* pp_nextstate and we never return...
645	* ah yes, and I don't care anyways ;)
646	*/
647	PUTBACK;
648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;
650
651	ENTER; /* necessary e.g. for dounwind */
652	}
653	}	568	}
654		569
655	static void	570	static void
656	continue_coro (void *arg)	571	coro_run (void *arg)
657	{	572	{
		573	/* coro_run is the alternative tail of transfer(), so unlock here. */
		574	UNLOCK;
		575
658	/*	576	/*
659	* this is a _very_ stripped down perl interpreter ;)	577	* this is a _very_ stripped down perl interpreter ;)
660	*/	578	*/
661	Coro__State ctx = (Coro__State)arg;
662	JMPENV coro_start_env;
663
664	PL_top_env = &ctx->start_env;	579	PL_top_env = &PL_start_env;
665		580
666	ctx->cursp = 0;	581	/* inject call to cctx_init */
667	PL_op = PL_op->op_next;	582	prepare_cctx ((coro_cctx *)arg);
668	CALLRUNOPS(aTHX);
669		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);
670	abort ();	589	abort ();
671	}	590	}
672		591
673	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
674	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	704	transfer (struct coro *prev, struct coro *next)
675	{	705	{
676	dSTACKLEVEL;	706	dSTACKLEVEL;
677	static struct coro *xnext;
678		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	}
679	if (prev != next)	714	else if (prev != next)
680	{	715	{
681	xnext = next;	716	coro_cctx *prev__cctx;
682		717
683	if (next->mainstack)	718	if (prev->flags & CF_NEW)
684	{	719	{
685	SAVE (prev, flags);	720	/* create a new empty context */
686	LOAD (next);	721	Newz (0, prev->cctx, 1, coro_cctx);
687		722	prev->cctx->inuse = 1;
688	/* mark this state as in-use */	723	prev->flags &= ~CF_NEW;
689	next->mainstack = 0;	724	prev->flags |= CF_RUNNING;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	/* don't add any code here */
716	}
717
718	}	725	}
719	else if (next->tmps_ix == -2)	726
720	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	}
721	else	750	else
722	{	751	{
723	SAVE (prev, -1); /* first get rid of the old state */	752	/* coroutine already started */
724		753	save_perl (prev);
725	if (flags & TRANSFER_SAVE_CCTXT)	754	load_perl (next);
726	{
727	if (!prev->stack)
728	allocate_stack (prev, 0);
729
730	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731	{
732	PL_top_env = &next->start_env;
733
734	setup_coro (next);
735
736	prev->stack->refcnt++;
737	prev->stack->usecnt++;
738	next->stack = prev->stack;
739	next->gencnt = prev->gencnt;
740	}
741	else
742	{
743	allocate_stack (next, 1);
744	coro_create (&(next->stack->cctx),
745	setup_coro, (void *)next,
746	next->stack->sptr, labs (next->stack->ssize));
747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748	/* don't add any code here */
749	}
750	}
751	else
752	setup_coro (next);
753	}	755	}
754		756
755	/*	757	prev__cctx = prev->cctx;
756	* xnext is now either prev or next, depending on wether	758
757	* we switched the c stack or not. that's why I use a global	759	/* possibly "free" the cctx */
758	* variable, that should become thread-specific at one point.	760	if (prev__cctx->idle_sp == STACKLEVEL)
759	*/	761	{
760	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;
761	}	788	}
		789	}
762		790
763	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)
764	{	805	{
765	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
766	coro_mortal = 0;	820	coro->mainstack = 0;
767	}	821	}
768	}
769		822
770	#define SV_CORO(sv,func) \	823	cctx_destroy (coro->cctx);
771	do { \	824	SvREFCNT_dec (coro->args);
772	if (SvROK (sv)) \	825	Safefree (coro);
773	sv = SvRV (sv); \	826	}
774	\
775	if (SvTYPE(sv) == SVt_PVHV) \
776	{ \
777	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
778	\
779	if (!he) \
780	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
781	\
782	(sv) = SvRV (HeVAL(he)); \
783	} \
784	\
785	/* must also be changed inside Coro::Cont::yield */ \
786	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
787	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
788	\
789	} while(0)
790		827
791	#define SvSTATE(sv) (struct coro *)SvIV (sv)
792
793	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
794	api_transfer(pTHX_ SV *prev, SV *next, int flags)	890	api_transfer (SV *prev_sv, SV *next_sv)
795	{	891	{
796	SV_CORO (prev, "Coro::transfer");	892	struct transfer_args ta;
797	SV_CORO (next, "Coro::transfer");
798		893
799	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;
800	}	908	}
801		909
802	/** Coro ********************************************************************/	910	/** Coro ********************************************************************/
803		911
804	#define PRIO_MAX 3	912	#define PRIO_MAX 3
…		…
807	#define PRIO_LOW -1	915	#define PRIO_LOW -1
808	#define PRIO_IDLE -3	916	#define PRIO_IDLE -3
809	#define PRIO_MIN -4	917	#define PRIO_MIN -4
810		918
811	/* for Coro.pm */	919	/* for Coro.pm */
812	static GV *coro_current, *coro_idle;	920	static SV *coro_current;
813	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
814	static int coro_nready;	922	static int coro_nready;
815		923
816	static void	924	static void
817	coro_enq (SV *sv)	925	coro_enq (SV *coro_sv)
818	{	926	{
819	if (SvTYPE (sv) == SVt_PVHV)
820	{
821	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
822	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
823
824	prio = prio > PRIO_MAX ? PRIO_MAX
825	: prio < PRIO_MIN ? PRIO_MIN
826	: prio;
827
828	av_push (coro_ready [prio - PRIO_MIN], sv);	927	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
829	coro_nready++;	928	coro_nready++;
830
831	return;
832	}
833
834	croak ("Coro::ready tried to enqueue something that is not a coroutine");
835	}	929	}
836		930
837	static SV *	931	static SV *
838	coro_deq (int min_prio)	932	coro_deq (int min_prio)
839	{	933	{
…		…
842	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
843	if (min_prio < 0)	937	if (min_prio < 0)
844	min_prio = 0;	938	min_prio = 0;
845		939
846	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
847	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
848	{	942	{
849	coro_nready--;	943	coro_nready--;
850	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
851	}	945	}
852		946
853	return 0;	947	return 0;
854	}	948	}
855		949
856	static void	950	static int
857	api_ready (SV *coro)	951	api_ready (SV *coro_sv)
858	{	952	{
		953	struct coro *coro;
		954
859	if (SvROK (coro))	955	if (SvROK (coro_sv))
860	coro = SvRV (coro);	956	coro_sv = SvRV (coro_sv);
861		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;
862	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);
863	}	1037	}
864		1038
865	static void	1039	static void
866	api_schedule (void)	1040	api_schedule (void)
867	{	1041	{
868	SV *prev, *next;	1042	struct transfer_args ta;
869		1043
870	prev = SvRV (GvSV (coro_current));	1044	prepare_schedule (&ta);
871	next = coro_deq (PRIO_MIN);	1045	TRANSFER (ta);
872
873	if (!next)
874	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
875
876	/* free this only after the transfer */
877	coro_mortal = prev;
878	SV_CORO (prev, "Coro::schedule");
879
880	SvRV (GvSV (coro_current)) = next;
881
882	SV_CORO (next, "Coro::schedule");
883
884	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
885	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
886	}	1046	}
887		1047
888	static void	1048	static void
889	api_cede (void)	1049	api_cede (void)
890	{	1050	{
891	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1051	struct transfer_args ta;
892		1052
893	api_schedule ();	1053	prepare_cede (&ta);
		1054	TRANSFER (ta);
894	}	1055	}
895		1056
896	MODULE = Coro::State PACKAGE = Coro::State	1057	MODULE = Coro::State PACKAGE = Coro::State
897		1058
898	PROTOTYPES: ENABLE	1059	PROTOTYPES: DISABLE
899		1060
900	BOOT:	1061	BOOT:
901	{ /* {} necessary for stoopid perl-5.6.x */	1062	{
902	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1063	#ifdef USE_ITHREADS
903	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1064	MUTEX_INIT (&coro_mutex);
		1065	#endif
		1066	BOOT_PAGESIZE;
		1067
904	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1068	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
905		1069
906	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1070	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
907	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1071	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
908	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));
909	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1074	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
910
911	if (!padlist_cache)
912	padlist_cache = newHV ();
913		1075
914	main_mainstack = PL_mainstack;	1076	main_mainstack = PL_mainstack;
915		1077
916	coroapi.ver = CORO_API_VERSION;	1078	coroapi.ver = CORO_API_VERSION;
917	coroapi.transfer = api_transfer;	1079	coroapi.transfer = api_transfer;
918	}
919		1080
920	Coro::State	1081	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
921	_newprocess(args)	1082	}
922	SV * args	1083
923	PROTOTYPE: $	1084	SV *
		1085	new (char *klass, ...)
924	CODE:	1086	CODE:
925	Coro__State coro;	1087	{
		1088	struct coro *coro;
		1089	HV *hv;
		1090	int i;
926		1091
927	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
928	croak ("Coro::State::_newprocess expects an arrayref");
929
930	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;
931		1096
932	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1097	hv = newHV ();
933	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;
934	coro->stack = 0;	1099	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
935		1100
936	/* same as JMPENV_BOOTSTRAP */	1101	for (i = 1; i < items; i++)
937	/* we might be able to recycle start_env, but safe is safe */	1102	av_push (coro->args, newSVsv (ST (i)));
938	Zero(&coro->start_env, 1, JMPENV);	1103	}
939	coro->start_env.je_ret = -1;
940	coro->start_env.je_mustcatch = TRUE;
941
942	RETVAL = coro;
943	OUTPUT:	1104	OUTPUT:
944	RETVAL	1105	RETVAL
945		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
946	void	1114	void
947	transfer(prev, next, flags)	1115	_set_stacklevel (...)
948	SV *prev	1116	ALIAS:
949	SV *next	1117	Coro::State::transfer = 1
950	int flags	1118	Coro::schedule = 2
951	PROTOTYPE: @	1119	Coro::cede = 3
952	CODE:	1120	CODE:
953	PUTBACK;	1121	{
954	SV_CORO (next, "Coro::transfer");	1122	struct transfer_args ta;
955	SV_CORO (prev, "Coro::transfer");	1123
956	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1124	switch (ix)
957	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	}
958		1149
959	void	1150	void
960	DESTROY(coro)	1151	_clone_state_from (SV *dst, SV *src)
961	Coro::State coro	1152	CODE:
962	CODE:	1153	{
		1154	struct coro *coro_src = SvSTATE (src);
963		1155
964	if (coro->mainstack && coro->mainstack != main_mainstack)	1156	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
965	{
966	struct coro temp;
967		1157
968	PUTBACK;	1158	++coro_src->refcnt;
969	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;
970	LOAD(aTHX_ coro);	1160	}
971	SPAGAIN;
972
973	destroy_stacks (aTHX);
974
975	LOAD((&temp)); /* this will get rid of defsv etc.. */
976	SPAGAIN;
977
978	coro->mainstack = 0;
979	}
980
981	deallocate_stack (coro);
982
983	Safefree (coro);
984		1161
985	void	1162	void
986	flush()
987	CODE:
988	#ifdef MAY_FLUSH
989	flush_padlist_cache ();
990	#endif
991
992	void
993	_exit(code)	1163	_exit (code)
994	int code	1164	int code
995	PROTOTYPE: $	1165	PROTOTYPE: $
996	CODE:	1166	CODE:
997	#if defined(__GLIBC__) || _POSIX_C_SOURCE
998	_exit (code);	1167	_exit (code);
999	#else
1000	signal (SIGTERM, SIG_DFL);
1001	raise (SIGTERM);
1002	exit (code);
1003	#endif
1004		1168
1005	MODULE = Coro::State PACKAGE = Coro::Cont	1169	int
		1170	cctx_count ()
		1171	CODE:
		1172	RETVAL = cctx_count;
		1173	OUTPUT:
		1174	RETVAL
1006		1175
1007	# this is slightly dirty (should expose a c-level api)	1176	int
1008		1177	cctx_idle ()
1009	void	1178	CODE:
1010	yield(...)	1179	RETVAL = cctx_idle;
1011	PROTOTYPE: @	1180	OUTPUT:
1012	CODE:	1181	RETVAL
1013	static SV *returnstk;
1014	SV *sv;
1015	AV *defav = GvAV (PL_defgv);
1016	struct coro *prev, *next;
1017
1018	if (!returnstk)
1019	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1020
1021	/* set up @_ -- ugly */
1022	av_clear (defav);
1023	av_fill (defav, items - 1);
1024	while (items--)
1025	av_store (defav, items, SvREFCNT_inc (ST(items)));
1026
1027	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1028	sv = av_pop ((AV *)SvRV (returnstk));
1029	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1030	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1031	SvREFCNT_dec (sv);
1032
1033	transfer(aTHX_ prev, next, 0);
1034		1182
1035	MODULE = Coro::State PACKAGE = Coro	1183	MODULE = Coro::State PACKAGE = Coro
1036		1184
1037	# this is slightly dirty (should expose a c-level api)
1038
1039	BOOT:	1185	BOOT:
1040	{	1186	{
1041	int i;	1187	int i;
		1188
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1189	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1190
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1191	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1192	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1193	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1194	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1195	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1196	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050		1197
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1198	coro_current = get_sv ("Coro::current", FALSE);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1199	SvREADONLY_on (coro_current);
1053		1200
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1201	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1202	coro_ready[i] = newAV ();
1056		1203
1057	{	1204	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1205	SV *sv = perl_get_sv("Coro::API", 1);
1059		1206
1060	coroapi.schedule = api_schedule;	1207	coroapi.schedule = api_schedule;
		1208	coroapi.save = api_save;
1061	coroapi.cede = api_cede;	1209	coroapi.cede = api_cede;
1062	coroapi.ready = api_ready;	1210	coroapi.ready = api_ready;
		1211	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1065		1214
1066	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1067	sv_setiv(sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on(sv);	1217	SvREADONLY_on (sv);
1069	}	1218	}
1070	}	1219	}
1071		1220
1072	void	1221	void
1073	ready(self)	1222	_set_current (SV *current)
1074	SV * self
1075	PROTOTYPE: $	1223	PROTOTYPE: $
1076	CODE:	1224	CODE:
1077	api_ready (self);	1225	SvREFCNT_dec (SvRV (coro_current));
		1226	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1078		1227
1079	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
1080	nready(...)	1265	nready (...)
1081	PROTOTYPE:	1266	PROTOTYPE:
1082	CODE:	1267	CODE:
1083	RETVAL = coro_nready;	1268	RETVAL = coro_nready;
1084	OUTPUT:	1269	OUTPUT:
1085	RETVAL	1270	RETVAL
1086		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
1087	void	1293	void
1088	schedule(...)	1294	_set_state (char *data_)
1089	PROTOTYPE:	1295	PROTOTYPE: $
1090	CODE:	1296	CODE:
1091	api_schedule ();	1297	{
		1298	struct io_state *data = (void *)data_;
1092		1299
1093	void	1300	errno = data->errorno;
1094	cede(...)	1301	PL_laststype = data->laststype;
1095	PROTOTYPE:	1302	PL_laststatval = data->laststatval;
1096	CODE:	1303	PL_statcache = data->statcache;
1097	api_cede ();	1304	}
1098		1305

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