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Comparing Coro/Coro/State.xs (file contents):
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC vs.
Revision 1.125 by root, Mon Dec 11 20:54:45 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
		43	/* 5.8.7 */
		44	#ifndef SvRV_set
		45	# define SvRV_set(s,v) SvRV(s) = (v)
		46	#endif
		47
7	#include <signal.h>	48	#include <stdio.h>
		49	#include <errno.h>
		50	#include <assert.h>
		51
		52	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		53	# undef STACKGUARD
		54	#endif
		55
		56	#ifndef STACKGUARD
		57	# define STACKGUARD 0
		58	#endif
8		59
9	#ifdef HAVE_MMAP	60	#ifdef HAVE_MMAP
10	# include <unistd.h>	61	# include <unistd.h>
11	# include <sys/mman.h>	62	# include <sys/mman.h>
12	# ifndef MAP_ANONYMOUS	63	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS MAP_ANON	65	# define MAP_ANONYMOUS MAP_ANON
15	# else	66	# else
16	# undef HAVE_MMAP	67	# undef HAVE_MMAP
17	# endif	68	# endif
18	# endif	69	# endif
		70	# include <limits.h>
		71	# ifndef PAGESIZE
		72	# define PAGESIZE pagesize
		73	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		74	static long pagesize;
		75	# else
		76	# define BOOT_PAGESIZE (void)0
19	#endif	77	# endif
20		78	#else
21	#define MAY_FLUSH /* increases codesize and is rarely used */	79	# define PAGESIZE 0
22		80	# define BOOT_PAGESIZE (void)0
23	#define SUB_INIT "Coro::State::initialize"	81	#endif
24	#define UCORO_STATE "_coro_state"
25		82
26	/* The next macro should declare a variable stacklevel that contains and approximation	83	/* 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	84	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	85	* and should be unique. */
		86	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	87	#define STACKLEVEL ((void *)&stacklevel)
30		88
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	89	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		90
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	91	#if __GNUC__ >= 3
		92	# define attribute(x) __attribute__(x)
		93	#else
		94	# define attribute(x)
		95	#endif
		96
		97	#define NOINLINE attribute ((noinline))
34		98
35	#include "CoroAPI.h"	99	#include "CoroAPI.h"
36		100
		101	#ifdef USE_ITHREADS
		102	static perl_mutex coro_mutex;
		103	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		104	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		105	#else
		106	# define LOCK (void)0
		107	# define UNLOCK (void)0
		108	#endif
		109
		110	struct io_state
		111	{
		112	int errorno;
		113	I32 laststype;
		114	int laststatval;
		115	Stat_t statcache;
		116	};
		117
37	static struct CoroAPI coroapi;	118	static struct CoroAPI coroapi;
		119	static AV *main_mainstack; /* used to differentiate between $main and others */
		120	static HV *coro_state_stash, *coro_stash;
		121	static SV *coro_mortal; /* will be freed after next transfer */
38		122
39	/* this is actually not only the c stack but also c registers etc... */	123	static struct coro_cctx *cctx_first;
		124	static int cctx_count, cctx_idle;
		125
		126	/* this is a structure representing a c-level coroutine */
40	typedef struct {	127	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	128	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		129
45	coro_context cctx;	130	/* the stack */
46
47	void *sptr;	131	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	132	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		133
		134	/* cpu state */
		135	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		136	JMPENV *top_env;
		137	coro_context cctx;
		138
		139	int inuse;
		140
		141	#if USE_VALGRIND
		142	int valgrind_id;
		143	#endif
		144	} coro_cctx;
		145
		146	enum {
		147	CF_RUNNING = 0x0001, /* coroutine is running */
		148	CF_READY = 0x0002, /* coroutine is ready */
		149	CF_NEW = 0x0004, /* ahs never been switched to */
		150	};
		151
		152	/* this is a structure representing a perl-level coroutine */
51	struct coro {	153	struct coro {
52	/* the optional C context */	154	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	155	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56
57	/* optionally saved, might be zero */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	AV *comppad;
74	SV **stack_base;
75	SV **stack_max;
76	SV **tmps_stack;
77	I32 tmps_floor;
78	I32 tmps_ix;
79	I32 tmps_max;
80	I32 *markstack;
81	I32 *markstack_ptr;
82	I32 *markstack_max;
83	I32 *scopestack;
84	I32 scopestack_ix;
85	I32 scopestack_max;
86	ANY *savestack;
87	I32 savestack_ix;
88	I32 savestack_max;
89	OP **retstack;
90	I32 retstack_ix;
91	I32 retstack_max;
92	COP *curcop;
93	JMPENV *top_env;
94		156
95	/* data associated with this coroutine (initial args) */	157	/* data associated with this coroutine (initial args) */
96	AV *args;	158	AV *args;
		159	int refcnt;
		160	int save; /* CORO_SAVE flags */
		161	int flags; /* CF_ flags */
		162
		163	/* optionally saved, might be zero */
		164	AV *defav; /* @_ */
		165	SV *defsv; /* $_ */
		166	SV *errsv; /* $@ */
		167	SV *irssv; /* $/ */
		168	SV *irssv_sv; /* real $/ cache */
		169
		170	#define VAR(name,type) type name;
		171	# include "state.h"
		172	#undef VAR
		173
		174	/* coro process data */
		175	int prio;
97	};	176	};
98		177
99	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
101		180
102	static AV *main_mainstack; /* used to differentiate between $main and others */	181	static AV *
103	static HV *coro_state_stash;	182	coro_clone_padlist (CV *cv)
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107	static SV *coro_mortal; /* will be freed after next transfer */
108
109	/* mostly copied from op.c:cv_clone2 */
110	STATIC AV *
111	clone_padlist (AV *protopadlist)
112	{	183	{
113	AV *av;	184	AV *padlist = CvPADLIST (cv);
114	I32 ix;
115	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV *newpadlist, *newpad_name, *newpad;	185	AV *newpadlist, *newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131		186
132	newpadlist = newAV ();	187	newpadlist = newAV ();
133	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
134	av_store (newpadlist, 0, (SV *) newpad_name);	189	#if PERL_VERSION_ATLEAST (5,9,0)
		190	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		191	#else
		192	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		193	#endif
		194	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		195	--AvFILLp (padlist);
		196
		197	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
135	av_store (newpadlist, 1, (SV *) newpad);	198	av_store (newpadlist, 1, (SV *)newpad);
136		199
137	av = newAV (); /* will be @_ */	200	return newpadlist;
138	av_extend (av, 0);	201	}
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141		202
142	for (ix = fpad; ix > 0; ix--)	203	static void
		204	free_padlist (AV *padlist)
		205	{
		206	/* may be during global destruction */
		207	if (SvREFCNT (padlist))
143	{	208	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	209	I32 i = AvFILLp (padlist);
145	if (namesv && namesv != &PL_sv_undef)	210	while (i >= 0)
146	{	211	{
147	char *name = SvPVX (namesv); /* XXX */	212	SV **svp = av_fetch (padlist, i--, FALSE);
148	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	213	if (svp)
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}	214	{
152	else
153	{ /* our own lexical */
154	SV *sv;	215	SV *sv;
155	if (*name == '&')	216	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156	sv = SvREFCNT_inc (ppad[ix]);	217	SvREFCNT_dec (sv);
157	else if (*name == '@')	218
158	sv = (SV *) newAV ();	219	SvREFCNT_dec (*svp);
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}	220	}
167	}	221	}
168	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	222
169	{	223	SvREFCNT_dec ((SV*)padlist);
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}	224	}
		225	}
179		226
180	#if 0 /* return -ENOTUNDERSTOOD */	227	static int
181	/* Now that vars are all in place, clone nested closures. */	228	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		229	{
		230	AV *padlist;
		231	AV *av = (AV *)mg->mg_obj;
182		232
183	for (ix = fpad; ix > 0; ix--) {	233	/* casting is fun. */
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
185	if (namesv	235	free_padlist (padlist);
186	&& namesv != &PL_sv_undef	236
187	&& !(SvFLAGS(namesv) & SVf_FAKE)	237	SvREFCNT_dec (av);
188	&& *SvPVX(namesv) == '&'	238
189	&& CvCLONE(ppad[ix]))	239	return 0;
190	{	240	}
191	CV *kid = cv_clone((CV*)ppad[ix]);	241
192	SvREFCNT_dec(ppad[ix]);	242	#define PERL_MAGIC_coro PERL_MAGIC_ext
193	CvCLONE_on(kid);	243
194	SvPADMY_on(kid);	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
195	npad[ix] = (SV*)kid;	245
196	}	246	#define CORO_MAGIC(cv) \
		247	SvMAGIC (cv) \
		248	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		249	? SvMAGIC (cv) \
		250	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		251	: 0
		252
		253	/* the next two functions merely cache the padlists */
		254	static void
		255	get_padlist (CV *cv)
		256	{
		257	MAGIC *mg = CORO_MAGIC (cv);
		258	AV *av;
		259
		260	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		261	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		262	else
		263	{
		264	#if 0
		265	/* this is probably cleaner, but also slower? */
		266	CV *cp = Perl_cv_clone (cv);
		267	CvPADLIST (cv) = CvPADLIST (cp);
		268	CvPADLIST (cp) = 0;
		269	SvREFCNT_dec (cp);
		270	#else
		271	CvPADLIST (cv) = coro_clone_padlist (cv);
		272	#endif
		273	}
		274	}
		275
		276	static void
		277	put_padlist (CV *cv)
		278	{
		279	MAGIC *mg = CORO_MAGIC (cv);
		280	AV *av;
		281
		282	if (!mg)
		283	{
		284	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		285	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		286	mg->mg_virtual = &vtbl_coro;
		287	mg->mg_obj = (SV *)newAV ();
197	}	288	}
198	#endif
199		289
200	return newpadlist;	290	av = (AV *)mg->mg_obj;
201	}
202		291
203	#ifdef MAY_FLUSH	292	if (AvFILLp (av) >= AvMAX (av))
204	STATIC void	293	av_extend (av, AvMAX (av) + 1);
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV *sv = svp ? *svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218		294
219	SvREFCNT_dec((SV*)padlist);	295	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
220	}
221	}	296	}
222	#endif
223
224	/* the next two functions merely cache the padlists */
225	STATIC void
226	get_padlist (CV *cv)
227	{
228	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230	if (he && AvFILLp ((AV *)*he) >= 0)
231	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232	else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234	}
235
236	STATIC void
237	put_padlist (CV *cv)
238	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241	if (SvTYPE (*he) != SVt_PVAV)
242	{
243	SvREFCNT_dec (*he);
244	*he = (SV *)newAV ();
245	}
246
247	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248	}
249
250	#ifdef MAY_FLUSH
251	STATIC void
252	flush_padlist_cache ()
253	{
254	HV *hv = padlist_cache;
255	padlist_cache = newHV ();
256
257	if (hv_iterinit (hv))
258	{
259	HE *he;
260	AV *padlist;
261
262	while (!!(he = hv_iternext (hv)))
263	{
264	AV *av = (AV *)HeVAL(he);
265
266	/* casting is fun. */
267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268	free_padlist (padlist);
269	}
270	}
271
272	SvREFCNT_dec (hv);
273	}
274	#endif
275		297
276	#define SB do {	298	#define SB do {
277	#define SE } while (0)	299	#define SE } while (0)
278		300
279	#define LOAD(state) load_state(aTHX_ (state));
280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	301	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
283		302
284	static void	303	static void
285	load_state(pTHX_ Coro__State c)	304	load_perl (Coro__State c)
286	{	305	{
287	PL_dowarn = c->dowarn;	306	#define VAR(name,type) PL_ ## name = c->name;
288	PL_in_eval = c->in_eval;	307	# include "state.h"
289		308	#undef VAR
290	PL_curstackinfo = c->curstackinfo;
291	PL_curstack = c->curstack;
292	PL_mainstack = c->mainstack;
293	PL_stack_sp = c->stack_sp;
294	PL_op = c->op;
295	PL_curpad = c->curpad;
296	PL_comppad = c->comppad;
297	PL_stack_base = c->stack_base;
298	PL_stack_max = c->stack_max;
299	PL_tmps_stack = c->tmps_stack;
300	PL_tmps_floor = c->tmps_floor;
301	PL_tmps_ix = c->tmps_ix;
302	PL_tmps_max = c->tmps_max;
303	PL_markstack = c->markstack;
304	PL_markstack_ptr = c->markstack_ptr;
305	PL_markstack_max = c->markstack_max;
306	PL_scopestack = c->scopestack;
307	PL_scopestack_ix = c->scopestack_ix;
308	PL_scopestack_max = c->scopestack_max;
309	PL_savestack = c->savestack;
310	PL_savestack_ix = c->savestack_ix;
311	PL_savestack_max = c->savestack_max;
312	PL_retstack = c->retstack;
313	PL_retstack_ix = c->retstack_ix;
314	PL_retstack_max = c->retstack_max;
315	PL_curcop = c->curcop;
316	PL_top_env = c->top_env;
317		309
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		313	if (c->irssv)
		314	{
		315	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		316	SvREFCNT_dec (c->irssv);
		317	else
		318	{
		319	REPLACE_SV (PL_rs, c->irssv);
		320	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		321	sv_setsv (c->irssv_sv, PL_rs);
		322	}
		323	}
321		324
322	{	325	{
323	dSP;	326	dSP;
324	CV *cv;	327	CV *cv;
325		328
326	/* now do the ugly restore mess */	329	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	330	while ((cv = (CV *)POPs))
328	{	331	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	332	put_padlist (cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	333	CvDEPTH (cv) = PTR2IV (POPs);
335	#ifdef USE_THREADS	334	CvPADLIST (cv) = (AV *)POPs;
336	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
337	#endif
338	}
339
340	++CvDEPTH(cv);
341	}	335	}
342		336
343	PUTBACK;	337	PUTBACK;
344	}	338	}
345	}	339	}
346		340
347	static void	341	static void
348	save_state(pTHX_ Coro__State c, int flags)	342	save_perl (Coro__State c)
349	{	343	{
350	{	344	{
351	dSP;	345	dSP;
352	I32 cxix = cxstack_ix;	346	I32 cxix = cxstack_ix;
353	PERL_CONTEXT *ccstk = cxstack;	347	PERL_CONTEXT *ccstk = cxstack;
…		…
364	{	358	{
365	while (cxix >= 0)	359	while (cxix >= 0)
366	{	360	{
367	PERL_CONTEXT *cx = &ccstk[cxix--];	361	PERL_CONTEXT *cx = &ccstk[cxix--];
368		362
369	if (CxTYPE(cx) == CXt_SUB)	363	if (CxTYPE (cx) == CXt_SUB)
370	{	364	{
371	CV *cv = cx->blk_sub.cv;	365	CV *cv = cx->blk_sub.cv;
		366
372	if (CvDEPTH(cv))	367	if (CvDEPTH (cv))
373	{	368	{
374	#ifdef USE_THREADS
375	/*XPUSHs ((SV *)CvOWNER(cv));*/
376	/*CvOWNER(cv) = 0;*/
377	/*error must unlock this cv etc.. etc...*/
378	#endif
379	EXTEND (SP, CvDEPTH(cv)*2);	369	EXTEND (SP, 3);
380		370
381	while (--CvDEPTH(cv))
382	{
383	/* this tells the restore code to increment CvDEPTH */
384	PUSHs (Nullsv);
385	PUSHs ((SV *)cv);
386	}
387
388	PUSHs ((SV *)CvPADLIST(cv));	371	PUSHs ((SV *)CvPADLIST (cv));
		372	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
389	PUSHs ((SV *)cv);	373	PUSHs ((SV *)cv);
390		374
		375	CvDEPTH (cv) = 0;
391	get_padlist (cv); /* this is a monster */	376	get_padlist (cv);
392	}	377	}
393	}	378	}
		379	#ifdef CXt_FORMAT
394	else if (CxTYPE(cx) == CXt_FORMAT)	380	else if (CxTYPE (cx) == CXt_FORMAT)
395	{	381	{
396	/* I never used formats, so how should I know how these are implemented? */	382	/* I never used formats, so how should I know how these are implemented? */
397	/* my bold guess is as a simple, plain sub... */	383	/* my bold guess is as a simple, plain sub... */
398	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
399	}	385	}
		386	#endif
400	}	387	}
401		388
402	if (top_si->si_type == PERLSI_MAIN)	389	if (top_si->si_type == PERLSI_MAIN)
403	break;	390	break;
404		391
…		…
408	}	395	}
409		396
410	PUTBACK;	397	PUTBACK;
411	}	398	}
412		399
413	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
414	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
415	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		403	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
416		404
417	c->dowarn = PL_dowarn;	405	#define VAR(name,type)c->name = PL_ ## name;
418	c->in_eval = PL_in_eval;	406	# include "state.h"
419		407	#undef VAR
420	c->curstackinfo = PL_curstackinfo;
421	c->curstack = PL_curstack;
422	c->mainstack = PL_mainstack;
423	c->stack_sp = PL_stack_sp;
424	c->op = PL_op;
425	c->curpad = PL_curpad;
426	c->comppad = PL_comppad;
427	c->stack_base = PL_stack_base;
428	c->stack_max = PL_stack_max;
429	c->tmps_stack = PL_tmps_stack;
430	c->tmps_floor = PL_tmps_floor;
431	c->tmps_ix = PL_tmps_ix;
432	c->tmps_max = PL_tmps_max;
433	c->markstack = PL_markstack;
434	c->markstack_ptr = PL_markstack_ptr;
435	c->markstack_max = PL_markstack_max;
436	c->scopestack = PL_scopestack;
437	c->scopestack_ix = PL_scopestack_ix;
438	c->scopestack_max = PL_scopestack_max;
439	c->savestack = PL_savestack;
440	c->savestack_ix = PL_savestack_ix;
441	c->savestack_max = PL_savestack_max;
442	c->retstack = PL_retstack;
443	c->retstack_ix = PL_retstack_ix;
444	c->retstack_max = PL_retstack_max;
445	c->curcop = PL_curcop;
446	c->top_env = PL_top_env;
447	}	408	}
448		409
449	/*	410	/*
450	* allocate various perl stacks. This is an exact copy	411	* allocate various perl stacks. This is an exact copy
451	* of perl.c:init_stacks, except that it uses less memory	412	* of perl.c:init_stacks, except that it uses less memory
452	* on the assumption that coroutines do not usually need	413	* on the (sometimes correct) assumption that coroutines do
453	* a lot of stackspace.	414	* not usually need a lot of stackspace.
454	*/	415	*/
455	STATIC void	416	static void
456	coro_init_stacks (pTHX)	417	coro_init_stacks ()
457	{	418	{
458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
459	PL_curstackinfo->si_type = PERLSI_MAIN;	420	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;	421	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462		423
463	PL_stack_base = AvARRAY(PL_curstack);	424	PL_stack_base = AvARRAY(PL_curstack);
464	PL_stack_sp = PL_stack_base;	425	PL_stack_sp = PL_stack_base;
465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466		427
467	New(50,PL_tmps_stack,96,SV*);	428	New(50,PL_tmps_stack,128,SV*);
468	PL_tmps_floor = -1;	429	PL_tmps_floor = -1;
469	PL_tmps_ix = -1;	430	PL_tmps_ix = -1;
470	PL_tmps_max = 96;	431	PL_tmps_max = 128;
471		432
472	New(54,PL_markstack,16,I32);	433	New(54,PL_markstack,32,I32);
473	PL_markstack_ptr = PL_markstack;	434	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;	435	PL_markstack_max = PL_markstack + 32;
475		436
		437	#ifdef SET_MARK_OFFSET
476	SET_MARK_OFFSET;	438	SET_MARK_OFFSET;
		439	#endif
477		440
478	New(54,PL_scopestack,16,I32);	441	New(54,PL_scopestack,32,I32);
479	PL_scopestack_ix = 0;	442	PL_scopestack_ix = 0;
480	PL_scopestack_max = 16;	443	PL_scopestack_max = 32;
481		444
482	New(54,PL_savestack,96,ANY);	445	New(54,PL_savestack,64,ANY);
483	PL_savestack_ix = 0;	446	PL_savestack_ix = 0;
484	PL_savestack_max = 96;	447	PL_savestack_max = 64;
485		448
		449	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	450	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	451	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	452	PL_retstack_max = 16;
		453	#endif
489	}	454	}
490		455
491	/*	456	/*
492	* destroy the stacks, the callchain etc...	457	* destroy the stacks, the callchain etc...
493	* still there is a memleak of 128 bytes...
494	*/	458	*/
495	STATIC void	459	static void
496	destroy_stacks(pTHX)	460	coro_destroy_stacks ()
497	{	461	{
498	if (!IN_DESTRUCT)	462	if (!IN_DESTRUCT)
499	{	463	{
500	/* is this ugly, I ask? */	464	/* is this ugly, I ask? */
501	while (PL_scopestack_ix)	465	LEAVE_SCOPE (0);
502	LEAVE;
503		466
504	/* sure it is, but more important: is it correct?? :/ */	467	/* sure it is, but more important: is it correct?? :/ */
505	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
506	FREETMPS;	468	FREETMPS;
		469
		470	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507	}	471	}
508		472
509	while (PL_curstackinfo->si_next)	473	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	474	PL_curstackinfo = PL_curstackinfo->si_next;
511		475
512	while (PL_curstackinfo)	476	while (PL_curstackinfo)
513	{	477	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	478	PERL_SI *p = PL_curstackinfo->si_prev;
515		479
516	{	480	{ /*D*//*remove*/
517	dSP;	481	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	482	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */	483	PUTBACK; /* possibly superfluous */
520	}	484	}
521		485
522	if (!IN_DESTRUCT)	486	if (!IN_DESTRUCT)
523	{	487	{
524	dounwind(-1);	488	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec(PL_curstackinfo->si_stack);	489	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}	490	}
527		491
528	Safefree(PL_curstackinfo->si_cxstack);	492	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree(PL_curstackinfo);	493	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	494	PL_curstackinfo = p;
531	}	495	}
532		496
533	Safefree(PL_tmps_stack);	497	Safefree (PL_tmps_stack);
534	Safefree(PL_markstack);	498	Safefree (PL_markstack);
535	Safefree(PL_scopestack);	499	Safefree (PL_scopestack);
536	Safefree(PL_savestack);	500	Safefree (PL_savestack);
		501	#if !PERL_VERSION_ATLEAST (5,9,0)
537	Safefree(PL_retstack);	502	Safefree (PL_retstack);
538	}
539
540	static void
541	allocate_stack (Coro__State ctx, int alloc)
542	{
543	coro_stack *stack;
544
545	New (0, stack, 1, coro_stack);
546
547	stack->refcnt = 1;
548	stack->usecnt = 1;
549	stack->gencnt = ctx->gencnt = 0;
550	if (alloc)
551	{
552	#if HAVE_MMAP
553	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
554	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555	if (stack->sptr == (void *)-1)
556	#endif	503	#endif
557	{
558	/*FIXME*//*D*//* reasonable stack size! */
559	stack->ssize = -4096 * sizeof (long);
560	New (0, stack->sptr, 4096, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565
566	ctx->stack = stack;
567	}	504	}
568		505
569	static void	506	static void
570	deallocate_stack (Coro__State ctx)	507	setup_coro (struct coro *coro)
571	{
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{
578	if (!--stack->refcnt)
579	{
580	#ifdef HAVE_MMAP
581	if (stack->ssize > 0 && stack->sptr)
582	munmap (stack->sptr, stack->ssize);
583	else
584	#else
585	Safefree (stack->sptr);
586	#endif
587	Safefree (stack);
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}
593
594	static void
595	setup_coro (void *arg)
596	{	508	{
597	/*	509	/*
598	* emulate part of the perl startup here.	510	* emulate part of the perl startup here.
599	*/	511	*/
		512
		513	coro_init_stacks ();
		514
		515	PL_curcop = &PL_compiling;
		516	PL_in_eval = EVAL_NULL;
		517	PL_curpm = 0;
		518	PL_localizing = 0;
		519	PL_dirty = 0;
		520	PL_restartop = 0;
		521
		522	{
		523	dSP;
		524	LOGOP myop;
		525
		526	SvREFCNT_dec (GvAV (PL_defgv));
		527	GvAV (PL_defgv) = coro->args; coro->args = 0;
		528
		529	Zero (&myop, 1, LOGOP);
		530	myop.op_next = Nullop;
		531	myop.op_flags = OPf_WANT_VOID;
		532
		533	PUSHMARK (SP);
		534	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		535	PUTBACK;
		536	PL_op = (OP *)&myop;
		537	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		538	SPAGAIN;
		539	}
		540
		541	ENTER; /* necessary e.g. for dounwind */
		542	}
		543
		544	static void
		545	free_coro_mortal ()
		546	{
		547	if (coro_mortal)
		548	{
		549	SvREFCNT_dec (coro_mortal);
		550	coro_mortal = 0;
		551	}
		552	}
		553
		554	/* inject a fake call to Coro::State::_cctx_init into the execution */
		555	static void NOINLINE
		556	prepare_cctx (coro_cctx *cctx)
		557	{
600	dSP;	558	dSP;
601	Coro__State ctx = (Coro__State)arg;	559	LOGOP myop;
602	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
603		560
604	coro_init_stacks (aTHX);	561	Zero (&myop, 1, LOGOP);
605	/*PL_curcop = 0;*/	562	myop.op_next = PL_op;
606	/*PL_in_eval = PL_in_eval;*/ /* inherit */	563	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
607	SvREFCNT_dec (GvAV (PL_defgv));
608	GvAV (PL_defgv) = ctx->args;
609		564
		565	PUSHMARK (SP);
		566	EXTEND (SP, 2);
		567	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		568	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		569	PUTBACK;
		570	PL_op = (OP *)&myop;
		571	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
610	SPAGAIN;	572	SPAGAIN;
611
612	if (ctx->stack)
613	{
614	ctx->cursp = 0;
615
616	PUSHMARK(SP);
617	PUTBACK;
618	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
619
620	if (SvTRUE (ERRSV))
621	croak (NULL);
622	else
623	croak ("FATAL: CCTXT coroutine returned!");
624	}
625	else
626	{
627	UNOP myop;
628
629	PL_op = (OP *)&myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PUSHMARK(SP);
636	XPUSHs (sub_init);
637	/*
638	* the next line is slightly wrong, as PL_op->op_next
639	* is actually being executed so we skip the first op.
640	* that doesn't matter, though, since it is only
641	* pp_nextstate and we never return...
642	* ah yes, and I don't care anyways ;)
643	*/
644	PUTBACK;
645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646	SPAGAIN;
647
648	ENTER; /* necessary e.g. for dounwind */
649	}
650	}	573	}
651		574
652	static void	575	static void
653	continue_coro (void *arg)	576	coro_run (void *arg)
654	{	577	{
		578	/* coro_run is the alternative tail of transfer(), so unlock here. */
		579	UNLOCK;
		580
655	/*	581	/*
656	* this is a _very_ stripped down perl interpreter ;)	582	* this is a _very_ stripped down perl interpreter ;)
657	*/	583	*/
658	Coro__State ctx = (Coro__State)arg;
659	JMPENV coro_start_env;
660
661	/* same as JMPENV_BOOTSTRAP */
662	Zero(&coro_start_env, 1, JMPENV);
663	coro_start_env.je_ret = -1;
664	coro_start_env.je_mustcatch = TRUE;
665	PL_top_env = &coro_start_env;	584	PL_top_env = &PL_start_env;
666		585
667	ctx->cursp = 0;	586	/* inject call to cctx_init */
668	PL_op = PL_op->op_next;	587	prepare_cctx ((coro_cctx *)arg);
669	CALLRUNOPS(aTHX);
670		588
		589	/* somebody will hit me for both perl_run and PL_restartop */
		590	PL_restartop = PL_op;
		591	perl_run (PL_curinterp);
		592
		593	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
671	abort ();	594	abort ();
672	}	595	}
673		596
674	STATIC void	597	static coro_cctx *
		598	cctx_new ()
		599	{
		600	coro_cctx *cctx;
		601
		602	++cctx_count;
		603
		604	Newz (0, cctx, 1, coro_cctx);
		605
		606	#if HAVE_MMAP
		607
		608	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		609	/* mmap supposedly does allocate-on-write for us */
		610	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		611
		612	if (cctx->sptr == (void *)-1)
		613	{
		614	perror ("FATAL: unable to mmap stack for coroutine");
		615	_exit (EXIT_FAILURE);
		616	}
		617
		618	# if STACKGUARD
		619	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		620	# endif
		621
		622	#else
		623
		624	cctx->ssize = STACKSIZE * (long)sizeof (long);
		625	New (0, cctx->sptr, STACKSIZE, long);
		626
		627	if (!cctx->sptr)
		628	{
		629	perror ("FATAL: unable to malloc stack for coroutine");
		630	_exit (EXIT_FAILURE);
		631	}
		632
		633	#endif
		634
		635	#if USE_VALGRIND
		636	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		637	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		638	cctx->ssize + (char *)cctx->sptr
		639	);
		640	#endif
		641
		642	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		643
		644	return cctx;
		645	}
		646
		647	static void
		648	cctx_destroy (coro_cctx *cctx)
		649	{
		650	if (!cctx)
		651	return;
		652
		653	--cctx_count;
		654
		655	#if USE_VALGRIND
		656	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		657	#endif
		658
		659	#if HAVE_MMAP
		660	munmap (cctx->sptr, cctx->ssize);
		661	#else
		662	Safefree (cctx->sptr);
		663	#endif
		664
		665	Safefree (cctx);
		666	}
		667
		668	static coro_cctx *
		669	cctx_get ()
		670	{
		671	coro_cctx *cctx;
		672
		673	if (cctx_first)
		674	{
		675	cctx = cctx_first;
		676	cctx_first = cctx->next;
		677	--cctx_idle;
		678	}
		679	else
		680	{
		681	cctx = cctx_new ();
		682	PL_op = PL_op->op_next;
		683	}
		684
		685	return cctx;
		686	}
		687
		688	static void
		689	cctx_put (coro_cctx *cctx)
		690	{
		691	/* free another cctx if overlimit */
		692	if (cctx_idle >= MAX_IDLE_CCTX)
		693	{
		694	coro_cctx *first = cctx_first;
		695	cctx_first = first->next;
		696	--cctx_idle;
		697
		698	assert (!first->inuse);
		699	cctx_destroy (first);
		700	}
		701
		702	++cctx_idle;
		703	cctx->next = cctx_first;
		704	cctx_first = cctx;
		705	}
		706
		707	/* never call directly, always through the coro_state_transfer global variable */
		708	static void NOINLINE
675	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	709	transfer (struct coro *prev, struct coro *next)
676	{	710	{
677	dSTACKLEVEL;	711	dSTACKLEVEL;
678	static struct coro *xnext;
679		712
		713	/* sometimes transfer is only called to set idle_sp */
		714	if (!next)
		715	{
		716	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		717	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		718	}
680	if (prev != next)	719	else if (prev != next)
681	{	720	{
682	xnext = next;	721	coro_cctx *prev__cctx;
683		722
684	if (next->mainstack)	723	if (prev->flags & CF_NEW)
685	{	724	{
686	SAVE (prev, flags);	725	/* create a new empty context */
687	LOAD (next);	726	Newz (0, prev->cctx, 1, coro_cctx);
688		727	prev->cctx->inuse = 1;
689	/* mark this state as in-use */	728	prev->flags &= ~CF_NEW;
690	next->mainstack = 0;	729	prev->flags |= CF_RUNNING;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	/* don't add any code here */
717	}
718
719	}	730	}
720	else if (next->tmps_ix == -2)	731
721	croak ("tried to transfer to running coroutine");	732	/*TODO: must not croak here */
		733	if (!prev->flags & CF_RUNNING)
		734	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		735
		736	if (next->flags & CF_RUNNING)
		737	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		738
		739	prev->flags &= ~CF_RUNNING;
		740	next->flags |= CF_RUNNING;
		741
		742	LOCK;
		743
		744	if (next->flags & CF_NEW)
		745	{
		746	/* need to start coroutine */
		747	next->flags &= ~CF_NEW;
		748	/* first get rid of the old state */
		749	save_perl (prev);
		750	/* setup coroutine call */
		751	setup_coro (next);
		752	/* need a new stack */
		753	assert (!next->cctx);
		754	}
722	else	755	else
723	{	756	{
724	SAVE (prev, -1); /* first get rid of the old state */	757	/* coroutine already started */
725		758	save_perl (prev);
726	if (flags & TRANSFER_SAVE_CCTXT)	759	load_perl (next);
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	setup_coro (next);
734
735	prev->stack->refcnt++;
736	prev->stack->usecnt++;
737	next->stack = prev->stack;
738	next->gencnt = prev->gencnt;
739	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	/* don't add any code here */
748	}
749	}
750	else
751	setup_coro (next);
752	}	760	}
753		761
754	/*	762	prev__cctx = prev->cctx;
755	* xnext is now either prev or next, depending on wether	763
756	* we switched the c stack or not. that's why I use a global	764	/* possibly "free" the cctx */
757	* variable, that should become thread-specific at one point.	765	if (prev__cctx->idle_sp == STACKLEVEL)
758	*/	766	{
759	xnext->cursp = stacklevel;	767	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		768	assert (PL_top_env == prev__cctx->top_env);
		769
		770	prev->cctx = 0;
		771
		772	cctx_put (prev__cctx);
		773	prev__cctx->inuse = 0;
		774	}
		775
		776	if (!next->cctx)
		777	{
		778	next->cctx = cctx_get ();
		779	assert (!next->cctx->inuse);
		780	next->cctx->inuse = 1;
		781	}
		782
		783	if (prev__cctx != next->cctx)
		784	{
		785	prev__cctx->top_env = PL_top_env;
		786	PL_top_env = next->cctx->top_env;
		787	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		788	}
		789
		790	free_coro_mortal ();
		791
		792	UNLOCK;
760	}	793	}
		794	}
761		795
762	if (coro_mortal)	796	struct transfer_args
		797	{
		798	struct coro *prev, *next;
		799	};
		800
		801	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		802
		803	static void
		804	coro_state_destroy (struct coro *coro)
		805	{
		806	if (coro->refcnt--)
		807	return;
		808
		809	if (coro->mainstack && coro->mainstack != main_mainstack)
763	{	810	{
764	SvREFCNT_dec (coro_mortal);	811	struct coro temp;
		812	Zero (&temp, 1, struct coro);
		813	temp.save = CORO_SAVE_ALL;
		814
		815	if (coro->flags & CF_RUNNING)
		816	croak ("FATAL: tried to destroy currently running coroutine");
		817
		818	save_perl (&temp);
		819	load_perl (coro);
		820
		821	coro_destroy_stacks ();
		822
		823	load_perl (&temp); /* this will get rid of defsv etc.. */
		824
765	coro_mortal = 0;	825	coro->mainstack = 0;
766	}	826	}
767	}
768		827
769	#define SV_CORO(sv,func) \	828	cctx_destroy (coro->cctx);
770	do { \	829	SvREFCNT_dec (coro->args);
771	if (SvROK (sv)) \	830	Safefree (coro);
772	sv = SvRV (sv); \	831	}
773	\
774	if (SvTYPE(sv) == SVt_PVHV) \
775	{ \
776	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
777	\
778	if (!he) \
779	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
780	\
781	(sv) = SvRV (HeVAL(he)); \
782	} \
783	\
784	/* must also be changed inside Coro::Cont::yield */ \
785	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
786	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
787	\
788	} while(0)
789		832
790	#define SvSTATE(sv) (struct coro *)SvIV (sv)
791
792	static void	833	static int
		834	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		835	{
		836	struct coro *coro = (struct coro *)mg->mg_ptr;
		837	mg->mg_ptr = 0;
		838
		839	coro_state_destroy (coro);
		840
		841	return 0;
		842	}
		843
		844	static int
		845	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		846	{
		847	struct coro *coro = (struct coro *)mg->mg_ptr;
		848
		849	++coro->refcnt;
		850
		851	return 0;
		852	}
		853
		854	static MGVTBL coro_state_vtbl = {
		855	0, 0, 0, 0,
		856	coro_state_clear,
		857	0,
		858	#ifdef MGf_DUP
		859	coro_state_dup,
		860	#else
		861	# define MGf_DUP 0
		862	#endif
		863	};
		864
		865	static struct coro *
		866	SvSTATE (SV *coro)
		867	{
		868	HV *stash;
		869	MAGIC *mg;
		870
		871	if (SvROK (coro))
		872	coro = SvRV (coro);
		873
		874	stash = SvSTASH (coro);
		875	if (stash != coro_stash && stash != coro_state_stash)
		876	{
		877	/* very slow, but rare, check */
		878	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		879	croak ("Coro::State object required");
		880	}
		881
		882	mg = SvMAGIC (coro);
		883	assert (mg->mg_type == PERL_MAGIC_ext);
		884	return (struct coro *)mg->mg_ptr;
		885	}
		886
		887	static void
		888	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		889	{
		890	ta->prev = SvSTATE (prev_sv);
		891	ta->next = SvSTATE (next_sv);
		892	}
		893
		894	static void
793	api_transfer(pTHX_ SV *prev, SV *next, int flags)	895	api_transfer (SV *prev_sv, SV *next_sv)
794	{	896	{
795	SV_CORO (prev, "Coro::transfer");	897	struct transfer_args ta;
796	SV_CORO (next, "Coro::transfer");
797		898
798	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	899	prepare_transfer (&ta, prev_sv, next_sv);
		900	TRANSFER (ta);
		901	}
		902
		903	static int
		904	api_save (SV *coro_sv, int new_save)
		905	{
		906	struct coro *coro = SvSTATE (coro_sv);
		907	int old_save = coro->save;
		908
		909	if (new_save >= 0)
		910	coro->save = new_save;
		911
		912	return old_save;
799	}	913	}
800		914
801	/** Coro ********************************************************************/	915	/** Coro ********************************************************************/
802		916
803	#define PRIO_MAX 3	917	#define PRIO_MAX 3
…		…
806	#define PRIO_LOW -1	920	#define PRIO_LOW -1
807	#define PRIO_IDLE -3	921	#define PRIO_IDLE -3
808	#define PRIO_MIN -4	922	#define PRIO_MIN -4
809		923
810	/* for Coro.pm */	924	/* for Coro.pm */
811	static GV *coro_current, *coro_idle;	925	static SV *coro_current;
812	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	926	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;	927	static int coro_nready;
814		928
815	static void	929	static void
816	coro_enq (SV *sv)	930	coro_enq (SV *coro_sv)
817	{	931	{
818	if (SvTYPE (sv) == SVt_PVHV)
819	{
820	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
821	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
822
823	prio = prio > PRIO_MAX ? PRIO_MAX
824	: prio < PRIO_MIN ? PRIO_MIN
825	: prio;
826
827	av_push (coro_ready [prio - PRIO_MIN], sv);	932	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
828	coro_nready++;	933	coro_nready++;
829
830	return;
831	}
832
833	croak ("Coro::ready tried to enqueue something that is not a coroutine");
834	}	934	}
835		935
836	static SV *	936	static SV *
837	coro_deq (int min_prio)	937	coro_deq (int min_prio)
838	{	938	{
…		…
841	min_prio -= PRIO_MIN;	941	min_prio -= PRIO_MIN;
842	if (min_prio < 0)	942	if (min_prio < 0)
843	min_prio = 0;	943	min_prio = 0;
844		944
845	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	945	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
846	if (av_len (coro_ready[prio]) >= 0)	946	if (AvFILLp (coro_ready [prio]) >= 0)
847	{	947	{
848	coro_nready--;	948	coro_nready--;
849	return av_shift (coro_ready[prio]);	949	return av_shift (coro_ready [prio]);
850	}	950	}
851		951
852	return 0;	952	return 0;
853	}	953	}
854		954
855	static void	955	static int
856	api_ready (SV *coro)	956	api_ready (SV *coro_sv)
857	{	957	{
		958	struct coro *coro;
		959
858	if (SvROK (coro))	960	if (SvROK (coro_sv))
859	coro = SvRV (coro);	961	coro_sv = SvRV (coro_sv);
860		962
		963	coro = SvSTATE (coro_sv);
		964
		965	if (coro->flags & CF_READY)
		966	return 0;
		967
		968	#if 0 /* this is actually harmless */
		969	if (coro->flags & CF_RUNNING)
		970	croak ("Coro::ready called on currently running coroutine");
		971	#endif
		972
		973	coro->flags |= CF_READY;
		974
		975	LOCK;
861	coro_enq (SvREFCNT_inc (coro));	976	coro_enq (SvREFCNT_inc (coro_sv));
		977	UNLOCK;
		978
		979	return 1;
		980	}
		981
		982	static int
		983	api_is_ready (SV *coro_sv)
		984	{
		985	return !!SvSTATE (coro_sv)->flags & CF_READY;
		986	}
		987
		988	static void
		989	prepare_schedule (struct transfer_args *ta)
		990	{
		991	SV *prev, *next;
		992
		993	for (;;)
		994	{
		995	LOCK;
		996	next = coro_deq (PRIO_MIN);
		997	UNLOCK;
		998
		999	if (next)
		1000	break;
		1001
		1002	{
		1003	dSP;
		1004
		1005	ENTER;
		1006	SAVETMPS;
		1007
		1008	PUSHMARK (SP);
		1009	PUTBACK;
		1010	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1011
		1012	FREETMPS;
		1013	LEAVE;
		1014	}
		1015	}
		1016
		1017	prev = SvRV (coro_current);
		1018	SvRV_set (coro_current, next);
		1019
		1020	/* free this only after the transfer */
		1021	LOCK;
		1022	free_coro_mortal ();
		1023	UNLOCK;
		1024	coro_mortal = prev;
		1025
		1026	assert (!SvROK(prev));//D
		1027	assert (!SvROK(next));//D
		1028
		1029	ta->prev = SvSTATE (prev);
		1030	ta->next = SvSTATE (next);
		1031
		1032	assert (ta->next->flags & CF_READY);
		1033	ta->next->flags &= ~CF_READY;
		1034	}
		1035
		1036	static void
		1037	prepare_cede (struct transfer_args *ta)
		1038	{
		1039	api_ready (coro_current);
		1040
		1041	prepare_schedule (ta);
862	}	1042	}
863		1043
864	static void	1044	static void
865	api_schedule (void)	1045	api_schedule (void)
866	{	1046	{
867	SV *prev, *next;	1047	struct transfer_args ta;
868		1048
869	prev = SvRV (GvSV (coro_current));	1049	prepare_schedule (&ta);
870	next = coro_deq (PRIO_MIN);	1050	TRANSFER (ta);
871
872	if (!next)
873	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
874
875	/* free this only after the transfer */
876	coro_mortal = prev;
877	SV_CORO (prev, "Coro::schedule");
878
879	SvRV (GvSV (coro_current)) = next;
880
881	SV_CORO (next, "Coro::schedule");
882
883	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
884	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
885	}	1051	}
886		1052
887	static void	1053	static void
888	api_cede (void)	1054	api_cede (void)
889	{	1055	{
890	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1056	struct transfer_args ta;
891		1057
892	api_schedule ();	1058	prepare_cede (&ta);
		1059	TRANSFER (ta);
893	}	1060	}
894		1061
895	MODULE = Coro::State PACKAGE = Coro::State	1062	MODULE = Coro::State PACKAGE = Coro::State
896		1063
897	PROTOTYPES: ENABLE	1064	PROTOTYPES: DISABLE
898		1065
899	BOOT:	1066	BOOT:
900	{ /* {} necessary for stoopid perl-5.6.x */	1067	{
901	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1068	#ifdef USE_ITHREADS
902	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1069	MUTEX_INIT (&coro_mutex);
		1070	#endif
		1071	BOOT_PAGESIZE;
		1072
903	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1073	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
904		1074
905	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1075	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
906	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1076	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
907	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1077	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1078	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
908	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1079	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
909
910	if (!padlist_cache)
911	padlist_cache = newHV ();
912		1080
913	main_mainstack = PL_mainstack;	1081	main_mainstack = PL_mainstack;
914		1082
915	coroapi.ver = CORO_API_VERSION;	1083	coroapi.ver = CORO_API_VERSION;
916	coroapi.transfer = api_transfer;	1084	coroapi.transfer = api_transfer;
917	}
918		1085
919	Coro::State	1086	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920	_newprocess(args)	1087	}
921	SV * args	1088
922	PROTOTYPE: $	1089	SV *
		1090	new (char *klass, ...)
923	CODE:	1091	CODE:
924	Coro__State coro;	1092	{
		1093	struct coro *coro;
		1094	HV *hv;
		1095	int i;
925		1096
926	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
927	croak ("Coro::State::_newprocess expects an arrayref");
928
929	New (0, coro, 1, struct coro);	1097	Newz (0, coro, 1, struct coro);
		1098	coro->args = newAV ();
		1099	coro->save = CORO_SAVE_ALL;
		1100	coro->flags = CF_NEW;
930		1101
931	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1102	hv = newHV ();
932	coro->mainstack = 0; /* actual work is done inside transfer */	1103	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
933	coro->stack = 0;	1104	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
934		1105
935	RETVAL = coro;	1106	for (i = 1; i < items; i++)
		1107	av_push (coro->args, newSVsv (ST (i)));
		1108	}
936	OUTPUT:	1109	OUTPUT:
937	RETVAL	1110	RETVAL
938		1111
		1112	int
		1113	save (SV *coro, int new_save = -1)
		1114	CODE:
		1115	RETVAL = api_save (coro, new_save);
		1116	OUTPUT:
		1117	RETVAL
		1118
939	void	1119	void
940	transfer(prev, next, flags)	1120	_set_stacklevel (...)
941	SV *prev	1121	ALIAS:
942	SV *next	1122	Coro::State::transfer = 1
943	int flags	1123	Coro::schedule = 2
944	PROTOTYPE: @	1124	Coro::cede = 3
945	CODE:	1125	CODE:
946	PUTBACK;	1126	{
947	SV_CORO (next, "Coro::transfer");	1127	struct transfer_args ta;
948	SV_CORO (prev, "Coro::transfer");	1128
949	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1129	switch (ix)
950	SPAGAIN;	1130	{
		1131	case 0:
		1132	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1133	ta.next = 0;
		1134	break;
		1135
		1136	case 1:
		1137	if (items != 2)
		1138	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1139
		1140	prepare_transfer (&ta, ST (0), ST (1));
		1141	break;
		1142
		1143	case 2:
		1144	prepare_schedule (&ta);
		1145	break;
		1146
		1147	case 3:
		1148	prepare_cede (&ta);
		1149	break;
		1150	}
		1151
		1152	TRANSFER (ta);
		1153	}
951		1154
952	void	1155	void
953	DESTROY(coro)	1156	_clone_state_from (SV *dst, SV *src)
954	Coro::State coro	1157	CODE:
955	CODE:	1158	{
		1159	struct coro *coro_src = SvSTATE (src);
956		1160
957	if (coro->mainstack && coro->mainstack != main_mainstack)	1161	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
958	{
959	struct coro temp;
960		1162
961	PUTBACK;	1163	++coro_src->refcnt;
962	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1164	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
963	LOAD(aTHX_ coro);	1165	}
964	SPAGAIN;
965
966	destroy_stacks (aTHX);
967
968	LOAD((&temp)); /* this will get rid of defsv etc.. */
969	SPAGAIN;
970
971	coro->mainstack = 0;
972	}
973
974	deallocate_stack (coro);
975
976	Safefree (coro);
977		1166
978	void	1167	void
979	flush()
980	CODE:
981	#ifdef MAY_FLUSH
982	flush_padlist_cache ();
983	#endif
984
985	void
986	_exit(code)	1168	_exit (code)
987	int code	1169	int code
988	PROTOTYPE: $	1170	PROTOTYPE: $
989	CODE:	1171	CODE:
990	#if defined(__GLIBC__) || _POSIX_C_SOURCE
991	_exit (code);	1172	_exit (code);
992	#else
993	signal (SIGTERM, SIG_DFL);
994	raise (SIGTERM);
995	exit (code);
996	#endif
997		1173
998	MODULE = Coro::State PACKAGE = Coro::Cont	1174	int
		1175	cctx_count ()
		1176	CODE:
		1177	RETVAL = cctx_count;
		1178	OUTPUT:
		1179	RETVAL
999		1180
1000	# this is slightly dirty (should expose a c-level api)	1181	int
1001		1182	cctx_idle ()
1002	void	1183	CODE:
1003	yield(...)	1184	RETVAL = cctx_idle;
1004	PROTOTYPE: @	1185	OUTPUT:
1005	CODE:	1186	RETVAL
1006	static SV *returnstk;
1007	SV *sv;
1008	AV *defav = GvAV (PL_defgv);
1009	struct coro *prev, *next;
1010
1011	if (!returnstk)
1012	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014	/* set up @_ -- ugly */
1015	av_clear (defav);
1016	av_fill (defav, items - 1);
1017	while (items--)
1018	av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021	sv = av_pop ((AV *)SvRV (returnstk));
1022	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024	SvREFCNT_dec (sv);
1025
1026	transfer(aTHX_ prev, next, 0);
1027		1187
1028	MODULE = Coro::State PACKAGE = Coro	1188	MODULE = Coro::State PACKAGE = Coro
1029		1189
1030	# this is slightly dirty (should expose a c-level api)
1031
1032	BOOT:	1190	BOOT:
1033	{	1191	{
1034	int i;	1192	int i;
		1193
1035	HV *stash = gv_stashpv ("Coro", TRUE);	1194	coro_stash = gv_stashpv ("Coro", TRUE);
1036		1195
1037	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1196	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1197	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1198	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1199	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1200	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1201	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043		1202
1044	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1203	coro_current = get_sv ("Coro::current", FALSE);
1045	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1204	SvREADONLY_on (coro_current);
1046		1205
1047	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1206	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048	coro_ready[i] = newAV ();	1207	coro_ready[i] = newAV ();
1049		1208
1050	{	1209	{
1051	SV *sv = perl_get_sv("Coro::API", 1);	1210	SV *sv = perl_get_sv("Coro::API", 1);
1052		1211
1053	coroapi.schedule = api_schedule;	1212	coroapi.schedule = api_schedule;
		1213	coroapi.save = api_save;
1054	coroapi.cede = api_cede;	1214	coroapi.cede = api_cede;
1055	coroapi.ready = api_ready;	1215	coroapi.ready = api_ready;
		1216	coroapi.is_ready = api_is_ready;
1056	coroapi.nready = &coro_nready;	1217	coroapi.nready = &coro_nready;
1057	coroapi.current = coro_current;	1218	coroapi.current = coro_current;
1058		1219
1059	GCoroAPI = &coroapi;	1220	GCoroAPI = &coroapi;
1060	sv_setiv(sv, (IV)&coroapi);	1221	sv_setiv (sv, (IV)&coroapi);
1061	SvREADONLY_on(sv);	1222	SvREADONLY_on (sv);
1062	}	1223	}
1063	}	1224	}
1064		1225
1065	void	1226	void
1066	ready(self)	1227	_set_current (SV *current)
1067	SV * self
1068	PROTOTYPE: $	1228	PROTOTYPE: $
1069	CODE:	1229	CODE:
1070	api_ready (self);	1230	SvREFCNT_dec (SvRV (coro_current));
		1231	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1071		1232
1072	int	1233	int
		1234	prio (Coro::State coro, int newprio = 0)
		1235	ALIAS:
		1236	nice = 1
		1237	CODE:
		1238	{
		1239	RETVAL = coro->prio;
		1240
		1241	if (items > 1)
		1242	{
		1243	if (ix)
		1244	newprio += coro->prio;
		1245
		1246	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1247	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1248
		1249	coro->prio = newprio;
		1250	}
		1251	}
		1252
		1253	SV *
		1254	ready (SV *self)
		1255	PROTOTYPE: $
		1256	CODE:
		1257	RETVAL = boolSV (api_ready (self));
		1258	OUTPUT:
		1259	RETVAL
		1260
		1261	SV *
		1262	is_ready (SV *self)
		1263	PROTOTYPE: $
		1264	CODE:
		1265	RETVAL = boolSV (api_is_ready (self));
		1266	OUTPUT:
		1267	RETVAL
		1268
		1269	int
1073	nready(...)	1270	nready (...)
1074	PROTOTYPE:	1271	PROTOTYPE:
1075	CODE:	1272	CODE:
1076	RETVAL = coro_nready;	1273	RETVAL = coro_nready;
1077	OUTPUT:	1274	OUTPUT:
1078	RETVAL	1275	RETVAL
1079		1276
		1277	MODULE = Coro::State PACKAGE = Coro::AIO
		1278
		1279	SV *
		1280	_get_state ()
		1281	CODE:
		1282	{
		1283	struct io_state *data;
		1284
		1285	RETVAL = newSV (sizeof (struct io_state));
		1286	data = (struct io_state *)SvPVX (RETVAL);
		1287	SvCUR_set (RETVAL, sizeof (struct io_state));
		1288	SvPOK_only (RETVAL);
		1289
		1290	data->errorno = errno;
		1291	data->laststype = PL_laststype;
		1292	data->laststatval = PL_laststatval;
		1293	data->statcache = PL_statcache;
		1294	}
		1295	OUTPUT:
		1296	RETVAL
		1297
1080	void	1298	void
1081	schedule(...)	1299	_set_state (char *data_)
1082	PROTOTYPE:	1300	PROTOTYPE: $
1083	CODE:	1301	CODE:
1084	api_schedule ();	1302	{
		1303	struct io_state *data = (void *)data_;
1085		1304
1086	void	1305	errno = data->errorno;
1087	cede(...)	1306	PL_laststype = data->laststype;
1088	PROTOTYPE:	1307	PL_laststatval = data->laststatval;
1089	CODE:	1308	PL_statcache = data->statcache;
1090	api_cede ();	1309	}
1091		1310

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