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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.278 by root, Sun Nov 16 07:09:28 2008 UTC vs.
Revision 1.290 by root, Tue Nov 18 05:51:38 2008 UTC

…		…
95	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
96	#endif	96	#endif
97	#ifndef newSV	97	#ifndef newSV
98	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
99	#endif	99	#endif
		100	#ifndef CvISXSUB_on
		101	# define CvISXSUB_on(cv) (void)cv
		102	#endif
100		103
101	/* 5.8.7 */	104	/* 5.8.7 */
102	#ifndef SvRV_set	105	#ifndef SvRV_set
103	# define SvRV_set(s,v) SvRV(s) = (v)	106	# define SvRV_set(s,v) SvRV(s) = (v)
104	#endif	107	#endif
…		…
142	#define NOINLINE attribute ((noinline))	145	#define NOINLINE attribute ((noinline))
143		146
144	#include "CoroAPI.h"	147	#include "CoroAPI.h"
145		148
146	#ifdef USE_ITHREADS	149	#ifdef USE_ITHREADS
147
148	static perl_mutex coro_lock;
149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151	# if CORO_PTHREAD	150	# if CORO_PTHREAD
152	static void *coro_thx;	151	static void *coro_thx;
153	# endif	152	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	153	#endif
161
162	# undef LOCK
163	# define LOCK (void)0
164	# undef UNLOCK
165	# define UNLOCK (void)0
166
167	/* helper storage struct for Coro::AIO */
168	struct io_state
169	{
170	AV *res;
171	int errorno;
172	I32 laststype; /* U16 in 5.10.0 */
173	int laststatval;
174	Stat_t statcache;
175	};
176		154
177	static double (*nvtime)(); /* so why doesn't it take void? */	155	static double (*nvtime)(); /* so why doesn't it take void? */
		156
		157	/* we hijack an hopefully unused CV flag for our purposes */
		158	#define CVf_SLF 0x4000
		159	static OP *pp_slf (pTHX);
178		160
179	static U32 cctx_gen;	161	static U32 cctx_gen;
180	static size_t cctx_stacksize = CORO_STACKSIZE;	162	static size_t cctx_stacksize = CORO_STACKSIZE;
181	static struct CoroAPI coroapi;	163	static struct CoroAPI coroapi;
182	static AV *main_mainstack; /* used to differentiate between $main and others */	164	static AV *main_mainstack; /* used to differentiate between $main and others */
183	static JMPENV *main_top_env;	165	static JMPENV *main_top_env;
184	static HV *coro_state_stash, *coro_stash;	166	static HV *coro_state_stash, *coro_stash;
185	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */	167	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186	static volatile struct coro *transfer_next;
187		168
188	static GV *irsgv; /* $/ */	169	static GV *irsgv; /* $/ */
189	static GV *stdoutgv; /* *STDOUT */	170	static GV *stdoutgv; /* *STDOUT */
190	static SV *rv_diehook;	171	static SV *rv_diehook;
191	static SV *rv_warnhook;	172	static SV *rv_warnhook;
…		…
257	/* this is a structure representing a perl-level coroutine */	238	/* this is a structure representing a perl-level coroutine */
258	struct coro {	239	struct coro {
259	/* the C coroutine allocated to this perl coroutine, if any */	240	/* the C coroutine allocated to this perl coroutine, if any */
260	coro_cctx *cctx;	241	coro_cctx *cctx;
261		242
262	/* process data */	243	/* state data */
263	struct CoroSLF slf_frame; /* saved slf frame */	244	struct CoroSLF slf_frame; /* saved slf frame */
264	AV *mainstack;	245	AV *mainstack;
265	perl_slots *slot; /* basically the saved sp */	246	perl_slots *slot; /* basically the saved sp */
266		247
267	AV *args; /* data associated with this coroutine (initial args) */	248	AV *args; /* data associated with this coroutine (initial args) */
268	int refcnt; /* coroutines are refcounted, yes */	249	int refcnt; /* coroutines are refcounted, yes */
269	int flags; /* CF_ flags */	250	int flags; /* CF_ flags */
270	HV *hv; /* the perl hash associated with this coro, if any */	251	HV *hv; /* the perl hash associated with this coro, if any */
		252	void (*on_destroy)(pTHX_ struct coro *coro);
271		253
272	/* statistics */	254	/* statistics */
273	int usecount; /* number of transfers to this coro */	255	int usecount; /* number of transfers to this coro */
274		256
275	/* coro process data */	257	/* coro process data */
…		…
284	};	266	};
285		267
286	typedef struct coro *Coro__State;	268	typedef struct coro *Coro__State;
287	typedef struct coro *Coro__State_or_hashref;	269	typedef struct coro *Coro__State_or_hashref;
288		270
		271	/* the following variables are effectively part of the perl context */
		272	/* and get copied between struct coro and these variables */
		273	/* the mainr easonw e don't support windows process emulation */
289	static struct CoroSLF slf_frame; /* the current slf frame */	274	static struct CoroSLF slf_frame; /* the current slf frame */
		275	static SV *coro_throw;
290		276
291	/** Coro ********************************************************************/	277	/** Coro ********************************************************************/
292		278
293	#define PRIO_MAX 3	279	#define PRIO_MAX 3
294	#define PRIO_HIGH 1	280	#define PRIO_HIGH 1
…		…
395	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	381	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396		382
397	return 0;	383	return 0;
398	}	384	}
399		385
400	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	386	#define CORO_MAGIC_type_cv 26
401	#define CORO_MAGIC_type_state PERL_MAGIC_ext	387	#define CORO_MAGIC_type_state PERL_MAGIC_ext
402		388
403	static MGVTBL coro_cv_vtbl = {	389	static MGVTBL coro_cv_vtbl = {
404	0, 0, 0, 0,	390	0, 0, 0, 0,
405	coro_cv_free	391	coro_cv_free
406	};	392	};
407		393
		394	#define CORO_MAGIC_NN(sv, type) \
		395	(expect_true (SvMAGIC (sv)->mg_type == type) \
		396	? SvMAGIC (sv) \
		397	: mg_find (sv, type))
		398
408	#define CORO_MAGIC(sv, type) \	399	#define CORO_MAGIC(sv, type) \
409	SvMAGIC (sv) \	400	(expect_true (SvMAGIC (sv)) \
410	? SvMAGIC (sv)->mg_type == type \	401	? CORO_MAGIC_NN (sv, type) \
411	? SvMAGIC (sv) \
412	: mg_find (sv, type) \
413	: 0	402	: 0)
414		403
415	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	404	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	405	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
417		406
418	INLINE struct coro *	407	INLINE struct coro *
419	SvSTATE_ (pTHX_ SV *coro)	408	SvSTATE_ (pTHX_ SV *coro)
420	{	409	{
421	HV *stash;	410	HV *stash;
…		…
438	mg = CORO_MAGIC_state (coro);	427	mg = CORO_MAGIC_state (coro);
439	return (struct coro *)mg->mg_ptr;	428	return (struct coro *)mg->mg_ptr;
440	}	429	}
441		430
442	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	431	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		432
		433	/* faster than SvSTATE, but expects a coroutine hv */
		434	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		435	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443		436
444	/* the next two functions merely cache the padlists */	437	/* the next two functions merely cache the padlists */
445	static void	438	static void
446	get_padlist (pTHX_ CV *cv)	439	get_padlist (pTHX_ CV *cv)
447	{	440	{
…		…
515	}	508	}
516		509
517	PUTBACK;	510	PUTBACK;
518	}	511	}
519		512
520	slf_frame = c->slf_frame;	513	slf_frame = c->slf_frame;
		514	coro_throw = c->throw;
521	}	515	}
522		516
523	static void	517	static void
524	save_perl (pTHX_ Coro__State c)	518	save_perl (pTHX_ Coro__State c)
525	{	519	{
		520	c->throw = coro_throw;
526	c->slf_frame = slf_frame;	521	c->slf_frame = slf_frame;
527		522
528	{	523	{
529	dSP;	524	dSP;
530	I32 cxix = cxstack_ix;	525	I32 cxix = cxstack_ix;
…		…
823	slf_check_nop (pTHX_ struct CoroSLF *frame)	818	slf_check_nop (pTHX_ struct CoroSLF *frame)
824	{	819	{
825	return 0;	820	return 0;
826	}	821	}
827		822
828	static void	823	static UNOP coro_setup_op;
		824
		825	static void NOINLINE /* noinline to keep it out of the transfer fast path */
829	coro_setup (pTHX_ struct coro *coro)	826	coro_setup (pTHX_ struct coro *coro)
830	{	827	{
831	/*	828	/*
832	* emulate part of the perl startup here.	829	* emulate part of the perl startup here.
833	*/	830	*/
…		…
876	/* this newly created coroutine might be run on an existing cctx which most	873	/* this newly created coroutine might be run on an existing cctx which most
877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.	874	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878	*/	875	*/
879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */	876	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */	877	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		878
		879	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		880	coro_setup_op.op_type = OP_CUSTOM;
		881	coro_setup_op.op_ppaddr = pp_slf;
		882	coro_setup_op.op_next = PL_op;
		883
		884	PL_op = (OP *)&coro_setup_op;
		885
		886	/* copy throw, in case it was set before coro_setup */
		887	coro_throw = coro->throw;
881	}	888	}
882		889
883	static void	890	static void
884	coro_destruct (pTHX_ struct coro *coro)	891	coro_destruct (pTHX_ struct coro *coro)
885	{	892	{
…		…
909		916
910	SvREFCNT_dec (PL_diehook);	917	SvREFCNT_dec (PL_diehook);
911	SvREFCNT_dec (PL_warnhook);	918	SvREFCNT_dec (PL_warnhook);
912		919
913	SvREFCNT_dec (coro->saved_deffh);	920	SvREFCNT_dec (coro->saved_deffh);
914	SvREFCNT_dec (coro->throw);	921	SvREFCNT_dec (coro_throw);
915		922
916	coro_destruct_stacks (aTHX);	923	coro_destruct_stacks (aTHX);
917	}	924	}
918		925
919	INLINE void	926	INLINE void
…		…
929	static int	936	static int
930	runops_trace (pTHX)	937	runops_trace (pTHX)
931	{	938	{
932	COP *oldcop = 0;	939	COP *oldcop = 0;
933	int oldcxix = -2;	940	int oldcxix = -2;
934	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	941	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
935	coro_cctx *cctx = coro->cctx;	942	coro_cctx *cctx = coro->cctx;
936		943
937	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	944	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938	{	945	{
939	PERL_ASYNC_CHECK ();	946	PERL_ASYNC_CHECK ();
…		…
1048		1055
1049	TAINT_NOT;	1056	TAINT_NOT;
1050	return 0;	1057	return 0;
1051	}	1058	}
1052		1059
		1060	static struct coro_cctx *cctx_ssl_cctx;
		1061	static struct CoroSLF cctx_ssl_frame;
		1062
1053	static void	1063	static void
1054	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)	1064	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1055	{	1065	{
1056	ta->prev = (struct coro *)cctx;	1066	ta->prev = (struct coro *)cctx_ssl_cctx;
1057	ta->next = 0;	1067	ta->next = 0;
1058	}	1068	}
1059		1069
1060	/* inject a fake call to Coro::State::_cctx_init into the execution */	1070	static int
1061	/* _cctx_init should be careful, as it could be called at almost any time */	1071	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1062	/* during execution of a perl program */	1072	{
1063	/* also initialises PL_top_env */	1073	*frame = cctx_ssl_frame;
		1074
		1075	return 0;
		1076	}
		1077
		1078	/* initialises PL_top_env and injects a pseudo-slf-call to sett he stacklevel */
1064	static void NOINLINE	1079	static void NOINLINE
1065	cctx_prepare (pTHX_ coro_cctx *cctx)	1080	cctx_prepare (pTHX_ coro_cctx *cctx)
1066	{	1081	{
1067	dSP;
1068	UNOP myop;
1069
1070	PL_top_env = &PL_start_env;	1082	PL_top_env = &PL_start_env;
1071		1083
1072	if (cctx->flags & CC_TRACE)	1084	if (cctx->flags & CC_TRACE)
1073	PL_runops = runops_trace;	1085	PL_runops = runops_trace;
1074		1086
1075	Zero (&myop, 1, UNOP);	1087	/* we already must be in an SLF call, there is no other valid way
1076	myop.op_next = PL_op;	1088	* that can lead to creation of a new cctx */
1077	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1089	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1090	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1078		1091
1079	PUSHMARK (SP);	1092	cctx_ssl_cctx = cctx;
1080	EXTEND (SP, 2);	1093	cctx_ssl_frame = slf_frame;
1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));	1094
1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1095	slf_frame.prepare = slf_prepare_set_stacklevel;
1083	PUTBACK;	1096	slf_frame.check = slf_check_set_stacklevel;
1084	PL_op = (OP *)&myop;
1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086	SPAGAIN;
1087	}	1097	}
1088		1098
1089	/* the tail of transfer: execute stuff we can only do after a transfer */	1099	/* the tail of transfer: execute stuff we can only do after a transfer */
1090	INLINE void	1100	INLINE void
1091	transfer_tail (pTHX)	1101	transfer_tail (pTHX)
1092	{	1102	{
1093	struct coro *next = (struct coro *)transfer_next;
1094	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097	free_coro_mortal (aTHX);	1103	free_coro_mortal (aTHX);
1098	UNLOCK;
1099
1100	if (expect_false (next->throw))
1101	{
1102	SV *exception = sv_2mortal (next->throw);
1103
1104	next->throw = 0;
1105	sv_setsv (ERRSV, exception);
1106	croak (0);
1107	}
1108	}	1104	}
1109		1105
1110	/*	1106	/*
1111	* this is a _very_ stripped down perl interpreter ;)	1107	* this is a _very_ stripped down perl interpreter ;)
1112	*/	1108	*/
…		…
1127		1123
1128	/* inject a fake subroutine call to cctx_init */	1124	/* inject a fake subroutine call to cctx_init */
1129	cctx_prepare (aTHX_ (coro_cctx *)arg);	1125	cctx_prepare (aTHX_ (coro_cctx *)arg);
1130		1126
1131	/* cctx_run is the alternative tail of transfer() */	1127	/* cctx_run is the alternative tail of transfer() */
1132	/* TODO: throwing an exception here might be deadly, VERIFY */
1133	transfer_tail (aTHX);	1128	transfer_tail (aTHX);
1134		1129
1135	/* somebody or something will hit me for both perl_run and PL_restartop */	1130	/* somebody or something will hit me for both perl_run and PL_restartop */
1136	PL_restartop = PL_op;	1131	PL_restartop = PL_op;
1137	perl_run (PL_curinterp);	1132	perl_run (PL_curinterp);
…		…
1293	/** coroutine switching *****************************************************/	1288	/** coroutine switching *****************************************************/
1294		1289
1295	static void	1290	static void
1296	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1291	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297	{	1292	{
		1293	/* TODO: throwing up here is considered harmful */
		1294
1298	if (expect_true (prev != next))	1295	if (expect_true (prev != next))
1299	{	1296	{
1300	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1297	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");	1298	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302		1299
…		…
1312	#endif	1309	#endif
1313	}	1310	}
1314	}	1311	}
1315		1312
1316	/* always use the TRANSFER macro */	1313	/* always use the TRANSFER macro */
1317	static void NOINLINE	1314	static void NOINLINE /* noinline so we have a fixed stackframe */
1318	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1315	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319	{	1316	{
1320	dSTACKLEVEL;	1317	dSTACKLEVEL;
1321		1318
1322	/* sometimes transfer is only called to set idle_sp */	1319	/* sometimes transfer is only called to set idle_sp */
…		…
1337	prev->flags |= CF_RUNNING;	1334	prev->flags |= CF_RUNNING;
1338	}	1335	}
1339		1336
1340	prev->flags &= ~CF_RUNNING;	1337	prev->flags &= ~CF_RUNNING;
1341	next->flags |= CF_RUNNING;	1338	next->flags |= CF_RUNNING;
1342
1343	LOCK;
1344		1339
1345	/* first get rid of the old state */	1340	/* first get rid of the old state */
1346	save_perl (aTHX_ prev);	1341	save_perl (aTHX_ prev);
1347		1342
1348	if (expect_false (next->flags & CF_NEW))	1343	if (expect_false (next->flags & CF_NEW))
…		…
1381	++next->usecount;	1376	++next->usecount;
1382		1377
1383	if (expect_true (!next->cctx))	1378	if (expect_true (!next->cctx))
1384	next->cctx = cctx_get (aTHX);	1379	next->cctx = cctx_get (aTHX);
1385		1380
1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387	transfer_next = next;
1388
1389	if (expect_false (prev__cctx != next->cctx))	1381	if (expect_false (prev__cctx != next->cctx))
1390	{	1382	{
1391	prev__cctx->top_env = PL_top_env;	1383	prev__cctx->top_env = PL_top_env;
1392	PL_top_env = next->cctx->top_env;	1384	PL_top_env = next->cctx->top_env;
1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1385	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
…		…
1406	coro_state_destroy (pTHX_ struct coro *coro)	1398	coro_state_destroy (pTHX_ struct coro *coro)
1407	{	1399	{
1408	if (coro->flags & CF_DESTROYED)	1400	if (coro->flags & CF_DESTROYED)
1409	return 0;	1401	return 0;
1410		1402
		1403	if (coro->on_destroy)
		1404	coro->on_destroy (aTHX_ coro);
		1405
1411	coro->flags |= CF_DESTROYED;	1406	coro->flags |= CF_DESTROYED;
1412		1407
1413	if (coro->flags & CF_READY)	1408	if (coro->flags & CF_READY)
1414	{	1409	{
1415	/* reduce nready, as destroying a ready coro effectively unreadies it */	1410	/* reduce nready, as destroying a ready coro effectively unreadies it */
1416	/* alternative: look through all ready queues and remove the coro */	1411	/* alternative: look through all ready queues and remove the coro */
1417	LOCK;
1418	--coro_nready;	1412	--coro_nready;
1419	UNLOCK;
1420	}	1413	}
1421	else	1414	else
1422	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1415	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423		1416
1424	if (coro->mainstack && coro->mainstack != main_mainstack)	1417	if (coro->mainstack && coro->mainstack != main_mainstack)
…		…
1502	TRANSFER (ta, 1);	1495	TRANSFER (ta, 1);
1503	}	1496	}
1504		1497
1505	/** Coro ********************************************************************/	1498	/** Coro ********************************************************************/
1506		1499
1507	static void	1500	INLINE void
1508	coro_enq (pTHX_ SV *coro_sv)	1501	coro_enq (pTHX_ struct coro *coro)
1509	{	1502	{
1510	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1503	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1511	}	1504	}
1512		1505
1513	static SV *	1506	INLINE SV *
1514	coro_deq (pTHX)	1507	coro_deq (pTHX)
1515	{	1508	{
1516	int prio;	1509	int prio;
1517		1510
1518	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1511	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1537	if (coro->flags & CF_READY)	1530	if (coro->flags & CF_READY)
1538	return 0;	1531	return 0;
1539		1532
1540	coro->flags |= CF_READY;	1533	coro->flags |= CF_READY;
1541		1534
1542	LOCK;
1543
1544	sv_hook = coro_nready ? 0 : coro_readyhook;	1535	sv_hook = coro_nready ? 0 : coro_readyhook;
1545	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1536	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546		1537
1547	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1538	coro_enq (aTHX_ coro);
1548	++coro_nready;	1539	++coro_nready;
1549		1540
1550	UNLOCK;
1551
1552	if (sv_hook)	1541	if (sv_hook)
1553	{	1542	{
1554	dSP;	1543	dSP;
1555		1544
1556	ENTER;	1545	ENTER;
1557	SAVETMPS;	1546	SAVETMPS;
1558		1547
1559	PUSHMARK (SP);	1548	PUSHMARK (SP);
1560	PUTBACK;	1549	PUTBACK;
1561	call_sv (sv_hook, G_DISCARD);	1550	call_sv (sv_hook, G_VOID | G_DISCARD);
1562	SPAGAIN;
1563		1551
1564	FREETMPS;	1552	FREETMPS;
1565	LEAVE;	1553	LEAVE;
1566	}	1554	}
1567		1555
…		…
1582	{	1570	{
1583	SV *prev_sv, *next_sv;	1571	SV *prev_sv, *next_sv;
1584		1572
1585	for (;;)	1573	for (;;)
1586	{	1574	{
1587	LOCK;
1588	next_sv = coro_deq (aTHX);	1575	next_sv = coro_deq (aTHX);
1589		1576
1590	/* nothing to schedule: call the idle handler */	1577	/* nothing to schedule: call the idle handler */
1591	if (expect_false (!next_sv))	1578	if (expect_false (!next_sv))
1592	{	1579	{
1593	dSP;	1580	dSP;
1594	UNLOCK;
1595		1581
1596	ENTER;	1582	ENTER;
1597	SAVETMPS;	1583	SAVETMPS;
1598		1584
1599	PUSHMARK (SP);	1585	PUSHMARK (SP);
1600	PUTBACK;	1586	PUTBACK;
1601	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1587	call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1602	SPAGAIN;
1603		1588
1604	FREETMPS;	1589	FREETMPS;
1605	LEAVE;	1590	LEAVE;
1606	continue;	1591	continue;
1607	}	1592	}
1608		1593
1609	ta->next = SvSTATE (next_sv);	1594	ta->next = SvSTATE_hv (next_sv);
1610		1595
1611	/* cannot transfer to destroyed coros, skip and look for next */	1596	/* cannot transfer to destroyed coros, skip and look for next */
1612	if (expect_false (ta->next->flags & CF_DESTROYED))	1597	if (expect_false (ta->next->flags & CF_DESTROYED))
1613	{	1598	{
1614	UNLOCK;
1615	SvREFCNT_dec (next_sv);	1599	SvREFCNT_dec (next_sv);
1616	/* coro_nready has already been taken care of by destroy */	1600	/* coro_nready has already been taken care of by destroy */
1617	continue;	1601	continue;
1618	}	1602	}
1619		1603
1620	--coro_nready;	1604	--coro_nready;
1621	UNLOCK;
1622	break;	1605	break;
1623	}	1606	}
1624		1607
1625	/* free this only after the transfer */	1608	/* free this only after the transfer */
1626	prev_sv = SvRV (coro_current);	1609	prev_sv = SvRV (coro_current);
1627	ta->prev = SvSTATE (prev_sv);	1610	ta->prev = SvSTATE_hv (prev_sv);
1628	TRANSFER_CHECK (*ta);	1611	TRANSFER_CHECK (*ta);
1629	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1612	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630	ta->next->flags &= ~CF_READY;	1613	ta->next->flags &= ~CF_READY;
1631	SvRV_set (coro_current, next_sv);	1614	SvRV_set (coro_current, next_sv);
1632		1615
1633	LOCK;
1634	free_coro_mortal (aTHX);	1616	free_coro_mortal (aTHX);
1635	coro_mortal = prev_sv;	1617	coro_mortal = prev_sv;
1636	UNLOCK;
1637	}	1618	}
1638		1619
1639	INLINE void	1620	INLINE void
1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)	1621	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641	{	1622	{
…		…
1718	if (coro->flags & CF_RUNNING)	1699	if (coro->flags & CF_RUNNING)
1719	PL_runops = RUNOPS_DEFAULT;	1700	PL_runops = RUNOPS_DEFAULT;
1720	else	1701	else
1721	coro->slot->runops = RUNOPS_DEFAULT;	1702	coro->slot->runops = RUNOPS_DEFAULT;
1722	}	1703	}
		1704	}
		1705
		1706	/*****************************************************************************/
		1707	/* schedule-like-function opcode (SLF) */
		1708
		1709	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1710	static const CV *slf_cv;
		1711	static SV **slf_argv;
		1712	static int slf_argc, slf_arga; /* count, allocated */
		1713	static I32 slf_ax; /* top of stack, for restore */
		1714
		1715	/* this restores the stack in the case we patched the entersub, to */
		1716	/* recreate the stack frame as perl will on following calls */
		1717	/* since entersub cleared the stack */
		1718	static OP *
		1719	pp_restore (pTHX)
		1720	{
		1721	int i;
		1722	SV **SP = PL_stack_base + slf_ax;
		1723
		1724	PUSHMARK (SP);
		1725
		1726	EXTEND (SP, slf_argc + 1);
		1727
		1728	for (i = 0; i < slf_argc; ++i)
		1729	PUSHs (sv_2mortal (slf_argv [i]));
		1730
		1731	PUSHs ((SV *)CvGV (slf_cv));
		1732
		1733	RETURNOP (slf_restore.op_first);
		1734	}
		1735
		1736	static void
		1737	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1738	{
		1739	SV **arg = (SV **)slf_frame.data;
		1740
		1741	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1742	}
		1743
		1744	static void
		1745	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1746	{
		1747	if (items != 2)
		1748	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1749
		1750	frame->prepare = slf_prepare_transfer;
		1751	frame->check = slf_check_nop;
		1752	frame->data = (void *)arg; /* let's hope it will stay valid */
		1753	}
		1754
		1755	static void
		1756	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1757	{
		1758	frame->prepare = prepare_schedule;
		1759	frame->check = slf_check_nop;
		1760	}
		1761
		1762	static void
		1763	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1764	{
		1765	frame->prepare = prepare_cede;
		1766	frame->check = slf_check_nop;
		1767	}
		1768
		1769	static void
		1770	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1771	{
		1772	frame->prepare = prepare_cede_notself;
		1773	frame->check = slf_check_nop;
		1774	}
		1775
		1776	/*
		1777	* these not obviously related functions are all rolled into one
		1778	* function to increase chances that they all will call transfer with the same
		1779	* stack offset
		1780	* SLF stands for "schedule-like-function".
		1781	*/
		1782	static OP *
		1783	pp_slf (pTHX)
		1784	{
		1785	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1786
		1787	/* set up the slf frame, unless it has already been set-up */
		1788	/* the latter happens when a new coro has been started */
		1789	/* or when a new cctx was attached to an existing coroutine */
		1790	if (expect_true (!slf_frame.prepare))
		1791	{
		1792	/* first iteration */
		1793	dSP;
		1794	SV **arg = PL_stack_base + TOPMARK + 1;
		1795	int items = SP - arg; /* args without function object */
		1796	SV *gv = *sp;
		1797
		1798	/* do a quick consistency check on the "function" object, and if it isn't */
		1799	/* for us, divert to the real entersub */
		1800	if (SvTYPE (gv) != SVt_PVGV
		1801	|| !GvCV (gv)
		1802	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1803	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1804
		1805	if (!(PL_op->op_flags & OPf_STACKED))
		1806	{
		1807	/* ampersand-form of call, use @_ instead of stack */
		1808	AV *av = GvAV (PL_defgv);
		1809	arg = AvARRAY (av);
		1810	items = AvFILLp (av) + 1;
		1811	}
		1812
		1813	/* now call the init function, which needs to set up slf_frame */
		1814	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1815	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1816
		1817	/* pop args */
		1818	SP = PL_stack_base + POPMARK;
		1819
		1820	PUTBACK;
		1821	}
		1822
		1823	/* now that we have a slf_frame, interpret it! */
		1824	/* we use a callback system not to make the code needlessly */
		1825	/* complicated, but so we can run multiple perl coros from one cctx */
		1826
		1827	do
		1828	{
		1829	struct coro_transfer_args ta;
		1830
		1831	slf_frame.prepare (aTHX_ &ta);
		1832	TRANSFER (ta, 0);
		1833
		1834	checkmark = PL_stack_sp - PL_stack_base;
		1835	}
		1836	while (slf_frame.check (aTHX_ &slf_frame));
		1837
		1838	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1839
		1840	/* return value handling - mostly like entersub */
		1841	/* make sure we put something on the stack in scalar context */
		1842	if (GIMME_V == G_SCALAR)
		1843	{
		1844	dSP;
		1845	SV **bot = PL_stack_base + checkmark;
		1846
		1847	if (sp == bot) /* too few, push undef */
		1848	bot [1] = &PL_sv_undef;
		1849	else if (sp != bot + 1) /* too many, take last one */
		1850	bot [1] = *sp;
		1851
		1852	SP = bot + 1;
		1853
		1854	PUTBACK;
		1855	}
		1856
		1857	/* exception handling */
		1858	if (expect_false (coro_throw))
		1859	{
		1860	SV *exception = sv_2mortal (coro_throw);
		1861
		1862	coro_throw = 0;
		1863	sv_setsv (ERRSV, exception);
		1864	croak (0);
		1865	}
		1866
		1867	return NORMAL;
		1868	}
		1869
		1870	static void
		1871	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1872	{
		1873	int i;
		1874	SV **arg = PL_stack_base + ax;
		1875	int items = PL_stack_sp - arg + 1;
		1876
		1877	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1878
		1879	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1880	&& PL_op->op_ppaddr != pp_slf)
		1881	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1882
		1883	CvFLAGS (cv) |= CVf_SLF;
		1884	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1885	slf_cv = cv;
		1886
		1887	/* we patch the op, and then re-run the whole call */
		1888	/* we have to put the same argument on the stack for this to work */
		1889	/* and this will be done by pp_restore */
		1890	slf_restore.op_next = (OP *)&slf_restore;
		1891	slf_restore.op_type = OP_CUSTOM;
		1892	slf_restore.op_ppaddr = pp_restore;
		1893	slf_restore.op_first = PL_op;
		1894
		1895	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1896
		1897	if (PL_op->op_flags & OPf_STACKED)
		1898	{
		1899	if (items > slf_arga)
		1900	{
		1901	slf_arga = items;
		1902	free (slf_argv);
		1903	slf_argv = malloc (slf_arga * sizeof (SV *));
		1904	}
		1905
		1906	slf_argc = items;
		1907
		1908	for (i = 0; i < items; ++i)
		1909	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1910	}
		1911	else
		1912	slf_argc = 0;
		1913
		1914	PL_op->op_ppaddr = pp_slf;
		1915	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1916
		1917	PL_op = (OP *)&slf_restore;
1723	}	1918	}
1724		1919
1725	/*****************************************************************************/	1920	/*****************************************************************************/
1726	/* PerlIO::cede */	1921	/* PerlIO::cede */
1727		1922
…		…
1796	PerlIOBuf_get_cnt,	1991	PerlIOBuf_get_cnt,
1797	PerlIOBuf_set_ptrcnt,	1992	PerlIOBuf_set_ptrcnt,
1798	};	1993	};
1799		1994
1800	/*****************************************************************************/	1995	/*****************************************************************************/
		1996	/* Coro::Semaphore */
1801		1997
1802	static const CV *slf_cv; /* for quick consistency check */
1803
1804	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1805	static SV *slf_arg0;
1806	static SV *slf_arg1;
1807	static SV *slf_arg2;
1808
1809	/* this restores the stack in the case we patched the entersub, to */
1810	/* recreate the stack frame as perl will on following calls */
1811	/* since entersub cleared the stack */
1812	static OP *
1813	pp_restore (pTHX)
1814	{
1815	dSP;
1816
1817	PUSHMARK (SP);
1818
1819	EXTEND (SP, 3);
1820	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1821	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1822	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1823	PUSHs ((SV *)CvGV (slf_cv));
1824
1825	RETURNOP (slf_restore.op_first);
1826	}
1827
1828	static void	1998	static void
1829	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)	1999	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1830	{	2000	{
1831	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);	2001	SV *count_sv = AvARRAY (av)[0];
1832	}	2002	IV count = SvIVX (count_sv);
1833		2003
1834	static void	2004	count += adjust;
1835	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)	2005	SvIVX (count_sv) = count;
1836	{
1837	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1838		2006
1839	frame->prepare = slf_prepare_set_stacklevel;	2007	/* now wake up as many waiters as are expected to lock */
1840	frame->check = slf_check_nop;	2008	while (count > 0 && AvFILLp (av) > 0)
1841	frame->data = (void *)SvIV (arg [0]);
1842	}
1843
1844	static void
1845	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1846	{
1847	SV **arg = (SV **)slf_frame.data;
1848
1849	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1850	}
1851
1852	static void
1853	slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1854	{
1855	if (items != 2)
1856	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1857
1858	frame->prepare = slf_prepare_transfer;
1859	frame->check = slf_check_nop;
1860	frame->data = (void *)arg; /* let's hope it will stay valid */
1861	}
1862
1863	static void
1864	slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1865	{
1866	frame->prepare = prepare_schedule;
1867	frame->check = slf_check_nop;
1868	}
1869
1870	static void
1871	slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872	{
1873	frame->prepare = prepare_cede;
1874	frame->check = slf_check_nop;
1875	}
1876
1877	static void
1878	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1879	{
1880	frame->prepare = prepare_cede_notself;
1881	frame->check = slf_check_nop;
1882	}
1883
1884	/* we hijack an hopefully unused CV flag for our purposes */
1885	#define CVf_SLF 0x4000
1886
1887	/*
1888	* these not obviously related functions are all rolled into one
1889	* function to increase chances that they all will call transfer with the same
1890	* stack offset
1891	* SLF stands for "schedule-like-function".
1892	*/
1893	static OP *
1894	pp_slf (pTHX)
1895	{
1896	I32 checkmark; /* mark SP to see how many elements check has pushed */
1897
1898	/* set up the slf frame, unless it has already been set-up */
1899	/* the latter happens when a new coro has been started */
1900	/* or when a new cctx was attached to an existing coroutine */
1901	if (expect_true (!slf_frame.prepare))
1902	{
1903	/* first iteration */
1904	dSP;
1905	SV **arg = PL_stack_base + TOPMARK + 1;
1906	int items = SP - arg; /* args without function object */
1907	SV *gv = *sp;
1908
1909	/* do a quick consistency check on the "function" object, and if it isn't */
1910	/* for us, divert to the real entersub */
1911	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1912	return PL_ppaddr[OP_ENTERSUB](aTHX);
1913
1914	/* pop args */
1915	SP = PL_stack_base + POPMARK;
1916
1917	if (!(PL_op->op_flags & OPf_STACKED))
1918	{
1919	/* ampersand-form of call, use @_ instead of stack */
1920	AV *av = GvAV (PL_defgv);
1921	arg = AvARRAY (av);
1922	items = AvFILLp (av) + 1;
1923	}
1924
1925	PUTBACK;
1926
1927	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1928	}
1929
1930	/* now interpret the slf_frame */
1931	/* we use a callback system not to make the code needlessly */
1932	/* complicated, but so we can run multiple perl coros from one cctx */
1933
1934	do
1935	{
1936	struct coro_transfer_args ta;
1937
1938	slf_frame.prepare (aTHX_ &ta);
1939	TRANSFER (ta, 0);
1940
1941	checkmark = PL_stack_sp - PL_stack_base;
1942	}
1943	while (slf_frame.check (aTHX_ &slf_frame));
1944
1945	{
1946	dSP;
1947	SV **bot = PL_stack_base + checkmark;
1948	int gimme = GIMME_V;
1949
1950	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1951
1952	/* make sure we put something on the stack in scalar context */
1953	if (gimme == G_SCALAR)
1954	{	2009	{
1955	if (sp == bot)	2010	SV *cb;
1956	XPUSHs (&PL_sv_undef);
1957		2011
1958	SP = bot + 1;	2012	/* swap first two elements so we can shift a waiter */
		2013	AvARRAY (av)[0] = AvARRAY (av)[1];
		2014	AvARRAY (av)[1] = count_sv;
		2015	cb = av_shift (av);
		2016
		2017	if (SvOBJECT (cb))
		2018	api_ready (aTHX_ cb);
		2019	else
		2020	croak ("callbacks not yet supported");
		2021
		2022	SvREFCNT_dec (cb);
		2023
		2024	--count;
1959	}	2025	}
1960
1961	PUTBACK;
1962	}
1963
1964	return NORMAL;
1965	}	2026	}
1966		2027
1967	static void	2028	static void
1968	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)	2029	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
1969	{	2030	{
1970	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));	2031	/* call $sem->adjust (0) to possibly wake up some other waiters */
1971		2032	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
1972	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1973	&& PL_op->op_ppaddr != pp_slf)
1974	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1975
1976	if (items > 3)
1977	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1978
1979	CvFLAGS (cv) |= CVf_SLF;
1980	CvXSUBANY (cv).any_ptr = (void *)init_cb;
1981	slf_cv = cv;
1982
1983	/* we patch the op, and then re-run the whole call */
1984	/* we have to put the same argument on the stack for this to work */
1985	/* and this will be done by pp_restore */
1986	slf_restore.op_next = (OP *)&slf_restore;
1987	slf_restore.op_type = OP_NULL;
1988	slf_restore.op_ppaddr = pp_restore;
1989	slf_restore.op_first = PL_op;
1990
1991	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1992	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1993	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1994
1995	PL_op->op_ppaddr = pp_slf;
1996
1997	PL_op = (OP *)&slf_restore;
1998	}	2033	}
1999
2000	/*****************************************************************************/
2001		2034
2002	static int	2035	static int
2003	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)	2036	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2004	{	2037	{
2005	AV *av = (AV *)frame->data;	2038	AV *av = (AV *)frame->data;
2006	SV *count_sv = AvARRAY (av)[0];	2039	SV *count_sv = AvARRAY (av)[0];
2007		2040
2008	if (SvIVX (count_sv) > 0)	2041	if (SvIVX (count_sv) > 0)
2009	{	2042	{
		2043	SvSTATE_current->on_destroy = 0;
2010	SvIVX (count_sv) = SvIVX (count_sv) - 1;	2044	SvIVX (count_sv) = SvIVX (count_sv) - 1;
2011	return 0;	2045	return 0;
2012	}	2046	}
2013	else	2047	else
2014	{	2048	{
…		…
2025	return 1;	2059	return 1;
2026	}	2060	}
2027	}	2061	}
2028		2062
2029	static void	2063	static void
2030	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)	2064	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2031	{	2065	{
2032	AV *av = (AV *)SvRV (arg [0]);	2066	AV *av = (AV *)SvRV (arg [0]);
2033		2067
2034	if (SvIVX (AvARRAY (av)[0]) > 0)	2068	if (SvIVX (AvARRAY (av)[0]) > 0)
2035	{	2069	{
2036	frame->data = (void *)av;	2070	frame->data = (void *)av;
2037	frame->prepare = prepare_nop;	2071	frame->prepare = prepare_nop;
		2072	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2038	}	2073	}
2039	else	2074	else
2040	{	2075	{
2041	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2076	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2042		2077
2043	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));	2078	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2044	frame->prepare = prepare_schedule;	2079	frame->prepare = prepare_schedule;
		2080
		2081	/* to avoid race conditions when a woken-up coro gets terminated */
		2082	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2083	assert (!SvSTATE_current->on_destroy);//D
		2084	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2045	}	2085	}
2046		2086
2047	frame->check = slf_check_semaphore_down;	2087	frame->check = slf_check_semaphore_down;
2048		2088
2049	}	2089	}
2050		2090
2051	/*****************************************************************************/	2091	/*****************************************************************************/
		2092	/* gensub: simple closure generation utility */
2052		2093
2053	#define GENSUB_ARG CvXSUBANY (cv).any_ptr	2094	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2054		2095
2055	/* create a closure from XS, returns a code reference */	2096	/* create a closure from XS, returns a code reference */
2056	/* the arg can be accessed via GENSUB_ARG from the callback */	2097	/* the arg can be accessed via GENSUB_ARG from the callback */
2057	/* the callback must use dXSARGS/XSRETURN */	2098	/* the callback must use dXSARGS/XSRETURN */
2058	static SV *	2099	static SV *
2059	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)	2100	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2060	{	2101	{
2061	CV *cv = (CV *)NEWSV (0, 0);	2102	CV *cv = (CV *)newSV (0);
2062		2103
2063	sv_upgrade ((SV *)cv, SVt_PVCV);	2104	sv_upgrade ((SV *)cv, SVt_PVCV);
2064		2105
2065	CvANON_on (cv);	2106	CvANON_on (cv);
2066	CvISXSUB_on (cv);	2107	CvISXSUB_on (cv);
…		…
2069		2110
2070	return newRV_noinc ((SV *)cv);	2111	return newRV_noinc ((SV *)cv);
2071	}	2112	}
2072		2113
2073	/*****************************************************************************/	2114	/*****************************************************************************/
		2115	/* Coro::AIO */
		2116
		2117	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2118
		2119	/* helper storage struct */
		2120	struct io_state
		2121	{
		2122	int errorno;
		2123	I32 laststype; /* U16 in 5.10.0 */
		2124	int laststatval;
		2125	Stat_t statcache;
		2126	};
		2127
		2128	static void
		2129	coro_aio_callback (pTHX_ CV *cv)
		2130	{
		2131	dXSARGS;
		2132	AV *state = (AV *)GENSUB_ARG;
		2133	SV *coro = av_pop (state);
		2134	SV *data_sv = newSV (sizeof (struct io_state));
		2135
		2136	av_extend (state, items);
		2137
		2138	sv_upgrade (data_sv, SVt_PV);
		2139	SvCUR_set (data_sv, sizeof (struct io_state));
		2140	SvPOK_only (data_sv);
		2141
		2142	{
		2143	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2144
		2145	data->errorno = errno;
		2146	data->laststype = PL_laststype;
		2147	data->laststatval = PL_laststatval;
		2148	data->statcache = PL_statcache;
		2149	}
		2150
		2151	/* now build the result vector out of all the parameters and the data_sv */
		2152	{
		2153	int i;
		2154
		2155	for (i = 0; i < items; ++i)
		2156	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2157	}
		2158
		2159	av_push (state, data_sv);
		2160
		2161	api_ready (aTHX_ coro);
		2162	SvREFCNT_dec (coro);
		2163	SvREFCNT_dec ((AV *)state);
		2164	}
		2165
		2166	static int
		2167	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2168	{
		2169	AV *state = (AV *)frame->data;
		2170
		2171	/* one element that is an RV? repeat! */
		2172	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2173	return 1;
		2174
		2175	/* restore status */
		2176	{
		2177	SV *data_sv = av_pop (state);
		2178	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2179
		2180	errno = data->errorno;
		2181	PL_laststype = data->laststype;
		2182	PL_laststatval = data->laststatval;
		2183	PL_statcache = data->statcache;
		2184
		2185	SvREFCNT_dec (data_sv);
		2186	}
		2187
		2188	/* push result values */
		2189	{
		2190	dSP;
		2191	int i;
		2192
		2193	EXTEND (SP, AvFILLp (state) + 1);
		2194	for (i = 0; i <= AvFILLp (state); ++i)
		2195	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2196
		2197	PUTBACK;
		2198	}
		2199
		2200	return 0;
		2201	}
		2202
		2203	static void
		2204	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2205	{
		2206	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2207	SV *coro_hv = SvRV (coro_current);
		2208	struct coro *coro = SvSTATE_hv (coro_hv);
		2209
		2210	/* put our coroutine id on the state arg */
		2211	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2212
		2213	/* first see whether we have a non-zero priority and set it as AIO prio */
		2214	if (coro->prio)
		2215	{
		2216	dSP;
		2217
		2218	static SV *prio_cv;
		2219	static SV *prio_sv;
		2220
		2221	if (expect_false (!prio_cv))
		2222	{
		2223	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2224	prio_sv = newSViv (0);
		2225	}
		2226
		2227	PUSHMARK (SP);
		2228	sv_setiv (prio_sv, coro->prio);
		2229	XPUSHs (prio_sv);
		2230
		2231	PUTBACK;
		2232	call_sv (prio_cv, G_VOID | G_DISCARD);
		2233	}
		2234
		2235	/* now call the original request */
		2236	{
		2237	dSP;
		2238	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2239	int i;
		2240
		2241	PUSHMARK (SP);
		2242
		2243	/* first push all args to the stack */
		2244	EXTEND (SP, items + 1);
		2245
		2246	for (i = 0; i < items; ++i)
		2247	PUSHs (arg [i]);
		2248
		2249	/* now push the callback closure */
		2250	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
		2251
		2252	/* now call the AIO function - we assume our request is uncancelable */
		2253	PUTBACK;
		2254	call_sv ((SV *)req, G_VOID | G_DISCARD);
		2255	}
		2256
		2257	/* now that the requets is going, we loop toll we have a result */
		2258	frame->data = (void *)state;
		2259	frame->prepare = prepare_schedule;
		2260	frame->check = slf_check_aio_req;
		2261	}
		2262
		2263	static void
		2264	coro_aio_req_xs (pTHX_ CV *cv)
		2265	{
		2266	dXSARGS;
		2267
		2268	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2269
		2270	XSRETURN_EMPTY;
		2271	}
		2272
		2273	/*****************************************************************************/
2074		2274
2075	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2275	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2076		2276
2077	PROTOTYPES: DISABLE	2277	PROTOTYPES: DISABLE
2078		2278
2079	BOOT:	2279	BOOT:
2080	{	2280	{
2081	#ifdef USE_ITHREADS	2281	#ifdef USE_ITHREADS
2082	MUTEX_INIT (&coro_lock);
2083	# if CORO_PTHREAD	2282	# if CORO_PTHREAD
2084	coro_thx = PERL_GET_CONTEXT;	2283	coro_thx = PERL_GET_CONTEXT;
2085	# endif	2284	# endif
2086	#endif	2285	#endif
2087	BOOT_PAGESIZE;	2286	BOOT_PAGESIZE;
…		…
2107	main_mainstack = PL_mainstack;	2306	main_mainstack = PL_mainstack;
2108	main_top_env = PL_top_env;	2307	main_top_env = PL_top_env;
2109		2308
2110	while (main_top_env->je_prev)	2309	while (main_top_env->je_prev)
2111	main_top_env = main_top_env->je_prev;	2310	main_top_env = main_top_env->je_prev;
		2311
		2312	{
		2313	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2314
		2315	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2316	hv_store_ent (PL_custom_op_names, slf,
		2317	newSVpv ("coro_slf", 0), 0);
		2318
		2319	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2320	hv_store_ent (PL_custom_op_descs, slf,
		2321	newSVpv ("coro schedule like function", 0), 0);
		2322	}
2112		2323
2113	coroapi.ver = CORO_API_VERSION;	2324	coroapi.ver = CORO_API_VERSION;
2114	coroapi.rev = CORO_API_REVISION;	2325	coroapi.rev = CORO_API_REVISION;
2115		2326
2116	coroapi.transfer = api_transfer;	2327	coroapi.transfer = api_transfer;
…		…
2162	}	2373	}
2163	OUTPUT:	2374	OUTPUT:
2164	RETVAL	2375	RETVAL
2165		2376
2166	void	2377	void
2167	_set_stacklevel (...)
2168	CODE:
2169	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2170
2171	void
2172	transfer (...)	2378	transfer (...)
2173	PROTOTYPE: $$	2379	PROTOTYPE: $$
2174	CODE:	2380	CODE:
2175	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);	2381	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2176		2382
2177	bool	2383	bool
2178	_destroy (SV *coro_sv)	2384	_destroy (SV *coro_sv)
2179	CODE:	2385	CODE:
2180	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2386	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2298		2504
2299	void	2505	void
2300	throw (Coro::State self, SV *throw = &PL_sv_undef)	2506	throw (Coro::State self, SV *throw = &PL_sv_undef)
2301	PROTOTYPE: $;$	2507	PROTOTYPE: $;$
2302	CODE:	2508	CODE:
		2509	{
		2510	struct coro *current = SvSTATE_current;
		2511	SV **throwp = self == current ? &coro_throw : &self->throw;
2303	SvREFCNT_dec (self->throw);	2512	SvREFCNT_dec (*throwp);
2304	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2513	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2514	}
2305		2515
2306	void	2516	void
2307	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2517	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2308	PROTOTYPE: $;$	2518	PROTOTYPE: $;$
2309	C_ARGS: aTHX_ coro, flags	2519	C_ARGS: aTHX_ coro, flags
…		…
2340		2550
2341	void	2551	void
2342	force_cctx ()	2552	force_cctx ()
2343	PROTOTYPE:	2553	PROTOTYPE:
2344	CODE:	2554	CODE:
2345	struct coro *coro = SvSTATE (coro_current);
2346	coro->cctx->idle_sp = 0;	2555	SvSTATE_current->cctx->idle_sp = 0;
2347		2556
2348	void	2557	void
2349	swap_defsv (Coro::State self)	2558	swap_defsv (Coro::State self)
2350	PROTOTYPE: $	2559	PROTOTYPE: $
2351	ALIAS:	2560	ALIAS:
…		…
2359	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2568	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2360		2569
2361	SV *tmp = *src; *src = *dst; *dst = tmp;	2570	SV *tmp = *src; *src = *dst; *dst = tmp;
2362	}	2571	}
2363		2572
		2573
2364	MODULE = Coro::State PACKAGE = Coro	2574	MODULE = Coro::State PACKAGE = Coro
2365		2575
2366	BOOT:	2576	BOOT:
2367	{	2577	{
2368	int i;	2578	int i;
…		…
2404	}	2614	}
2405		2615
2406	void	2616	void
2407	schedule (...)	2617	schedule (...)
2408	CODE:	2618	CODE:
2409	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);	2619	CORO_EXECUTE_SLF_XS (slf_init_schedule);
2410		2620
2411	void	2621	void
2412	cede (...)	2622	cede (...)
2413	CODE:	2623	CODE:
2414	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);	2624	CORO_EXECUTE_SLF_XS (slf_init_cede);
2415		2625
2416	void	2626	void
2417	cede_notself (...)	2627	cede_notself (...)
2418	CODE:	2628	CODE:
2419	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);	2629	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2420		2630
2421	void	2631	void
2422	_set_current (SV *current)	2632	_set_current (SV *current)
2423	PROTOTYPE: $	2633	PROTOTYPE: $
2424	CODE:	2634	CODE:
…		…
2427		2637
2428	void	2638	void
2429	_set_readyhook (SV *hook)	2639	_set_readyhook (SV *hook)
2430	PROTOTYPE: $	2640	PROTOTYPE: $
2431	CODE:	2641	CODE:
2432	LOCK;
2433	SvREFCNT_dec (coro_readyhook);	2642	SvREFCNT_dec (coro_readyhook);
2434	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2643	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2435	UNLOCK;
2436		2644
2437	int	2645	int
2438	prio (Coro::State coro, int newprio = 0)	2646	prio (Coro::State coro, int newprio = 0)
2439	PROTOTYPE: $;$	2647	PROTOTYPE: $;$
2440	ALIAS:	2648	ALIAS:
…		…
2476	# for async_pool speedup	2684	# for async_pool speedup
2477	void	2685	void
2478	_pool_1 (SV *cb)	2686	_pool_1 (SV *cb)
2479	CODE:	2687	CODE:
2480	{	2688	{
2481	struct coro *coro = SvSTATE (coro_current);
2482	HV *hv = (HV *)SvRV (coro_current);	2689	HV *hv = (HV *)SvRV (coro_current);
		2690	struct coro *coro = SvSTATE_hv ((SV *)hv);
2483	AV *defav = GvAV (PL_defgv);	2691	AV *defav = GvAV (PL_defgv);
2484	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2692	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2485	AV *invoke_av;	2693	AV *invoke_av;
2486	int i, len;	2694	int i, len;
2487		2695
…		…
2514		2722
2515	void	2723	void
2516	_pool_2 (SV *cb)	2724	_pool_2 (SV *cb)
2517	CODE:	2725	CODE:
2518	{	2726	{
2519	struct coro *coro = SvSTATE (coro_current);	2727	HV *hv = (HV *)SvRV (coro_current);
		2728	struct coro *coro = SvSTATE_hv ((SV *)hv);
2520		2729
2521	sv_setsv (cb, &PL_sv_undef);	2730	sv_setsv (cb, &PL_sv_undef);
2522		2731
2523	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2732	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2524	coro->saved_deffh = 0;	2733	coro->saved_deffh = 0;
…		…
2531	SvREFCNT_dec (old);	2740	SvREFCNT_dec (old);
2532	croak ("\3async_pool terminate\2\n");	2741	croak ("\3async_pool terminate\2\n");
2533	}	2742	}
2534		2743
2535	av_clear (GvAV (PL_defgv));	2744	av_clear (GvAV (PL_defgv));
2536	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2745	hv_store (hv, "desc", sizeof ("desc") - 1,
2537	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2746	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2538		2747
2539	coro->prio = 0;	2748	coro->prio = 0;
2540		2749
2541	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2750	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
…		…
2543		2752
2544	av_push (av_async_pool, newSVsv (coro_current));	2753	av_push (av_async_pool, newSVsv (coro_current));
2545	}	2754	}
2546		2755
2547		2756
2548	MODULE = Coro::State PACKAGE = Coro::AIO
2549
2550	void
2551	_get_state (SV *self)
2552	PROTOTYPE: $
2553	PPCODE:
2554	{
2555	AV *defav = GvAV (PL_defgv);
2556	AV *av = newAV ();
2557	int i;
2558	SV *data_sv = newSV (sizeof (struct io_state));
2559	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2560	SvCUR_set (data_sv, sizeof (struct io_state));
2561	SvPOK_only (data_sv);
2562
2563	data->errorno = errno;
2564	data->laststype = PL_laststype;
2565	data->laststatval = PL_laststatval;
2566	data->statcache = PL_statcache;
2567
2568	av_extend (av, AvFILLp (defav) + 1 + 1);
2569
2570	for (i = 0; i <= AvFILLp (defav); ++i)
2571	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2572
2573	av_push (av, data_sv);
2574
2575	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2576
2577	api_ready (aTHX_ self);
2578	}
2579
2580	void
2581	_set_state (SV *state)
2582	PROTOTYPE: $
2583	PPCODE:
2584	{
2585	AV *av = (AV *)SvRV (state);
2586	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2587	int i;
2588
2589	errno = data->errorno;
2590	PL_laststype = data->laststype;
2591	PL_laststatval = data->laststatval;
2592	PL_statcache = data->statcache;
2593
2594	EXTEND (SP, AvFILLp (av));
2595	for (i = 0; i < AvFILLp (av); ++i)
2596	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2597	}
2598
2599
2600	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2601
2602	BOOT:
2603	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2604
2605	void
2606	_schedule (...)
2607	CODE:
2608	{
2609	static int incede;
2610
2611	api_cede_notself (aTHX);
2612
2613	++incede;
2614	while (coro_nready >= incede && api_cede (aTHX))
2615	;
2616
2617	sv_setsv (sv_activity, &PL_sv_undef);
2618	if (coro_nready >= incede)
2619	{
2620	PUSHMARK (SP);
2621	PUTBACK;
2622	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2623	SPAGAIN;
2624	}
2625
2626	--incede;
2627	}
2628
2629
2630	MODULE = Coro::State PACKAGE = PerlIO::cede	2757	MODULE = Coro::State PACKAGE = PerlIO::cede
2631		2758
2632	BOOT:	2759	BOOT:
2633	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2760	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2761
2634		2762
2635	MODULE = Coro::State PACKAGE = Coro::Semaphore	2763	MODULE = Coro::State PACKAGE = Coro::Semaphore
2636		2764
2637	SV *	2765	SV *
2638	new (SV *klass, SV *count_ = 0)	2766	new (SV *klass, SV *count_ = 0)
2639	CODE:	2767	CODE:
2640	{	2768	{
2641	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */	2769	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2642	AV *av = newAV ();	2770	AV *av = newAV ();
		2771	SV **ary;
		2772
		2773	/* unfortunately, building manually saves memory */
		2774	Newx (ary, 2, SV *);
		2775	AvALLOC (av) = ary;
		2776	AvARRAY (av) = ary;
		2777	AvMAX (av) = 1;
		2778	AvFILLp (av) = 0;
2643	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));	2779	ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
		2780
2644	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));	2781	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2645	}	2782	}
2646	OUTPUT:	2783	OUTPUT:
2647	RETVAL	2784	RETVAL
2648		2785
…		…
2656	void	2793	void
2657	up (SV *self, int adjust = 1)	2794	up (SV *self, int adjust = 1)
2658	ALIAS:	2795	ALIAS:
2659	adjust = 1	2796	adjust = 1
2660	CODE:	2797	CODE:
2661	{	2798	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2662	AV *av = (AV *)SvRV (self);
2663	SV *count_sv = AvARRAY (av)[0];
2664	IV count = SvIVX (count_sv);
2665
2666	count += ix ? adjust : 1;
2667	SvIVX (count_sv) = count;
2668
2669	/* now wake up as many waiters as possible */
2670	while (count > 0 && AvFILLp (av) >= count)
2671	{
2672	SV *cb;
2673
2674	/* swap first two elements so we can shift a waiter */
2675	AvARRAY (av)[0] = AvARRAY (av)[1];
2676	AvARRAY (av)[1] = count_sv;
2677	cb = av_shift (av);
2678
2679	if (SvOBJECT (cb))
2680	api_ready (aTHX_ cb);
2681	else
2682	croak ("callbacks not yet supported");
2683
2684	SvREFCNT_dec (cb);
2685	}
2686	}
2687		2799
2688	void	2800	void
2689	down (SV *self)	2801	down (SV *self)
2690	CODE:	2802	CODE:
2691	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);	2803	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2692		2804
2693	void	2805	void
2694	try (SV *self)	2806	try (SV *self)
2695	PPCODE:	2807	PPCODE:
2696	{	2808	{
…		…
2719	else	2831	else
2720	{	2832	{
2721	int i;	2833	int i;
2722	EXTEND (SP, AvFILLp (av) + 1 - 1);	2834	EXTEND (SP, AvFILLp (av) + 1 - 1);
2723	for (i = 1; i <= AvFILLp (av); ++i)	2835	for (i = 1; i <= AvFILLp (av); ++i)
2724	PUSHs (newSVsv (AvARRAY (av)[i]));	2836	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2725	}	2837	}
2726	}	2838	}
2727		2839
		2840
		2841	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2842
		2843	BOOT:
		2844	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2845
		2846	void
		2847	_schedule (...)
		2848	CODE:
		2849	{
		2850	static int incede;
		2851
		2852	api_cede_notself (aTHX);
		2853
		2854	++incede;
		2855	while (coro_nready >= incede && api_cede (aTHX))
		2856	;
		2857
		2858	sv_setsv (sv_activity, &PL_sv_undef);
		2859	if (coro_nready >= incede)
		2860	{
		2861	PUSHMARK (SP);
		2862	PUTBACK;
		2863	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		2864	}
		2865
		2866	--incede;
		2867	}
		2868
		2869
		2870	MODULE = Coro::State PACKAGE = Coro::AIO
		2871
		2872	void
		2873	_register (char *target, char *proto, SV *req)
		2874	CODE:
		2875	{
		2876	HV *st;
		2877	GV *gvp;
		2878	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		2879	/* newXSproto doesn't return the CV on 5.8 */
		2880	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		2881	sv_setpv ((SV *)slf_cv, proto);
		2882	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		2883	}
		2884

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