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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.256 by root, Sat Nov 8 13:32:18 2008 UTC vs.
Revision 1.287 by root, Mon Nov 17 07:03:12 2008 UTC

…		…
46	# define BOOT_PAGESIZE (void)0	46	# define BOOT_PAGESIZE (void)0
47	#endif	47	#endif
48		48
49	#if CORO_USE_VALGRIND	49	#if CORO_USE_VALGRIND
50	# include <valgrind/valgrind.h>	50	# include <valgrind/valgrind.h>
51	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52	#else
53	# define REGISTER_STACK(cctx,start,end)
54	#endif	51	#endif
55		52
56	/* the maximum number of idle cctx that will be pooled */	53	/* the maximum number of idle cctx that will be pooled */
57	static int cctx_max_idle = 4;	54	static int cctx_max_idle = 4;
58		55
…		…
119	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
120	#endif	117	#endif
121		118
122	/* The next macros try to return the current stack pointer, in an as	119	/* The next macros try to return the current stack pointer, in an as
123	* portable way as possible. */	120	* portable way as possible. */
124	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
125	#define STACKLEVEL ((void *)&stacklevel)	122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
		123	#else
		124	# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
		125	#endif
126		126
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		128
129	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
130	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
131	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
133	#else	133	#else
134	# define attribute(x)	134	# define attribute(x)
135	# define BARRIER
136	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
137	#endif	137	#endif
138		138
139	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
140	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
141		141
142	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
143		143
144	#include "CoroAPI.h"	144	#include "CoroAPI.h"
145		145
146	#ifdef USE_ITHREADS	146	#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	147	# if CORO_PTHREAD
152	static void *coro_thx;	148	static void *coro_thx;
153	# endif	149	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	150	#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		151
177	static double (*nvtime)(); /* so why doesn't it take void? */	152	static double (*nvtime)(); /* so why doesn't it take void? */
178		153
179	static U32 cctx_gen;	154	static U32 cctx_gen;
180	static size_t cctx_stacksize = CORO_STACKSIZE;	155	static size_t cctx_stacksize = CORO_STACKSIZE;
…		…
209	CC_TRACE_LINE = 0x10, /* trace each statement */	184	CC_TRACE_LINE = 0x10, /* trace each statement */
210	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	185	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
211	};	186	};
212		187
213	/* this is a structure representing a c-level coroutine */	188	/* this is a structure representing a c-level coroutine */
214	typedef struct coro_cctx {	189	typedef struct coro_cctx
		190	{
215	struct coro_cctx *next;	191	struct coro_cctx *next;
216		192
217	/* the stack */	193	/* the stack */
218	void *sptr;	194	void *sptr;
219	size_t ssize;	195	size_t ssize;
…		…
237	CF_NEW = 0x0004, /* has never been switched to */	213	CF_NEW = 0x0004, /* has never been switched to */
238	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	214	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
239	};	215	};
240		216
241	/* the structure where most of the perl state is stored, overlaid on the cxstack */	217	/* the structure where most of the perl state is stored, overlaid on the cxstack */
242	typedef struct {	218	typedef struct
		219	{
243	SV *defsv;	220	SV *defsv;
244	AV *defav;	221	AV *defav;
245	SV *errsv;	222	SV *errsv;
246	SV *irsgv;	223	SV *irsgv;
247	#define VAR(name,type) type name;	224	#define VAR(name,type) type name;
…		…
251		228
252	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
253		230
254	/* this is a structure representing a perl-level coroutine */	231	/* this is a structure representing a perl-level coroutine */
255	struct coro {	232	struct coro {
256	/* the c coroutine allocated to this perl coroutine, if any */	233	/* the C coroutine allocated to this perl coroutine, if any */
257	coro_cctx *cctx;	234	coro_cctx *cctx;
258		235
259	/* process data */	236	/* state data */
		237	struct CoroSLF slf_frame; /* saved slf frame */
260	AV *mainstack;	238	AV *mainstack;
261	perl_slots *slot; /* basically the saved sp */	239	perl_slots *slot; /* basically the saved sp */
262		240
263	AV *args; /* data associated with this coroutine (initial args) */	241	AV *args; /* data associated with this coroutine (initial args) */
264	int refcnt; /* coroutines are refcounted, yes */	242	int refcnt; /* coroutines are refcounted, yes */
265	int flags; /* CF_ flags */	243	int flags; /* CF_ flags */
266	HV *hv; /* the perl hash associated with this coro, if any */	244	HV *hv; /* the perl hash associated with this coro, if any */
		245	void (*on_destroy)(pTHX_ struct coro *coro);
267		246
268	/* statistics */	247	/* statistics */
269	int usecount; /* number of transfers to this coro */	248	int usecount; /* number of transfers to this coro */
270		249
271	/* coro process data */	250	/* coro process data */
…		…
279	struct coro *next, *prev;	258	struct coro *next, *prev;
280	};	259	};
281		260
282	typedef struct coro *Coro__State;	261	typedef struct coro *Coro__State;
283	typedef struct coro *Coro__State_or_hashref;	262	typedef struct coro *Coro__State_or_hashref;
		263
		264	/* the following variables are effectively part of the perl context */
		265	/* and get copied between struct coro and these variables */
		266	/* the mainr easonw e don't support windows process emulation */
		267	static struct CoroSLF slf_frame; /* the current slf frame */
		268	static SV *coro_throw;
284		269
285	/** Coro ********************************************************************/	270	/** Coro ********************************************************************/
286		271
287	#define PRIO_MAX 3	272	#define PRIO_MAX 3
288	#define PRIO_HIGH 1	273	#define PRIO_HIGH 1
…		…
292	#define PRIO_MIN -4	277	#define PRIO_MIN -4
293		278
294	/* for Coro.pm */	279	/* for Coro.pm */
295	static SV *coro_current;	280	static SV *coro_current;
296	static SV *coro_readyhook;	281	static SV *coro_readyhook;
297	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	282	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
298	static int coro_nready;
299	static struct coro *coro_first;	283	static struct coro *coro_first;
		284	#define coro_nready coroapi.nready
300		285
301	/** lowlevel stuff **********************************************************/	286	/** lowlevel stuff **********************************************************/
302		287
303	static SV *	288	static SV *
304	coro_get_sv (pTHX_ const char *name, int create)	289	coro_get_sv (pTHX_ const char *name, int create)
…		…
389	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	374	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
390		375
391	return 0;	376	return 0;
392	}	377	}
393		378
394	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	379	#define CORO_MAGIC_type_cv 26
395	#define CORO_MAGIC_type_state PERL_MAGIC_ext	380	#define CORO_MAGIC_type_state PERL_MAGIC_ext
396		381
397	static MGVTBL coro_cv_vtbl = {	382	static MGVTBL coro_cv_vtbl = {
398	0, 0, 0, 0,	383	0, 0, 0, 0,
399	coro_cv_free	384	coro_cv_free
400	};	385	};
401		386
		387	#define CORO_MAGIC_NN(sv, type) \
		388	(expect_true (SvMAGIC (sv)->mg_type == type) \
		389	? SvMAGIC (sv) \
		390	: mg_find (sv, type))
		391
402	#define CORO_MAGIC(sv, type) \	392	#define CORO_MAGIC(sv, type) \
403	SvMAGIC (sv) \	393	(expect_true (SvMAGIC (sv)) \
404	? SvMAGIC (sv)->mg_type == type \	394	? CORO_MAGIC_NN (sv, type) \
405	? SvMAGIC (sv) \
406	: mg_find (sv, type) \
407	: 0	395	: 0)
408		396
409	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	397	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
410	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	398	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
411		399
412	static struct coro *	400	INLINE struct coro *
413	SvSTATE_ (pTHX_ SV *coro)	401	SvSTATE_ (pTHX_ SV *coro)
414	{	402	{
415	HV *stash;	403	HV *stash;
416	MAGIC *mg;	404	MAGIC *mg;
417		405
…		…
432	mg = CORO_MAGIC_state (coro);	420	mg = CORO_MAGIC_state (coro);
433	return (struct coro *)mg->mg_ptr;	421	return (struct coro *)mg->mg_ptr;
434	}	422	}
435		423
436	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	424	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		425
		426	/* faster than SvSTATE, but expects a coroutine hv */
		427	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		428	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
437		429
438	/* the next two functions merely cache the padlists */	430	/* the next two functions merely cache the padlists */
439	static void	431	static void
440	get_padlist (pTHX_ CV *cv)	432	get_padlist (pTHX_ CV *cv)
441	{	433	{
…		…
508	CvPADLIST (cv) = (AV *)POPs;	500	CvPADLIST (cv) = (AV *)POPs;
509	}	501	}
510		502
511	PUTBACK;	503	PUTBACK;
512	}	504	}
		505
		506	slf_frame = c->slf_frame;
		507	coro_throw = c->throw;
513	}	508	}
514		509
515	static void	510	static void
516	save_perl (pTHX_ Coro__State c)	511	save_perl (pTHX_ Coro__State c)
517	{	512	{
		513	c->throw = coro_throw;
		514	c->slf_frame = slf_frame;
		515
518	{	516	{
519	dSP;	517	dSP;
520	I32 cxix = cxstack_ix;	518	I32 cxix = cxstack_ix;
521	PERL_CONTEXT *ccstk = cxstack;	519	PERL_CONTEXT *ccstk = cxstack;
522	PERL_SI *top_si = PL_curstackinfo;	520	PERL_SI *top_si = PL_curstackinfo;
…		…
589	#undef VAR	587	#undef VAR
590	}	588	}
591	}	589	}
592		590
593	/*	591	/*
594	* allocate various perl stacks. This is an exact copy	592	* allocate various perl stacks. This is almost an exact copy
595	* of perl.c:init_stacks, except that it uses less memory	593	* of perl.c:init_stacks, except that it uses less memory
596	* on the (sometimes correct) assumption that coroutines do	594	* on the (sometimes correct) assumption that coroutines do
597	* not usually need a lot of stackspace.	595	* not usually need a lot of stackspace.
598	*/	596	*/
599	#if CORO_PREFER_PERL_FUNCTIONS	597	#if CORO_PREFER_PERL_FUNCTIONS
…		…
801		799
802	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	800	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
803	}	801	}
804		802
805	static void	803	static void
		804	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		805	{
		806	/* kind of mega-hacky, but works */
		807	ta->next = ta->prev = (struct coro *)ta;
		808	}
		809
		810	static int
		811	slf_check_nop (pTHX_ struct CoroSLF *frame)
		812	{
		813	return 0;
		814	}
		815
		816	static void NOINLINE /* noinline to keep it out of the transfer fast path */
806	coro_setup (pTHX_ struct coro *coro)	817	coro_setup (pTHX_ struct coro *coro)
807	{	818	{
808	/*	819	/*
809	* emulate part of the perl startup here.	820	* emulate part of the perl startup here.
810	*/	821	*/
…		…
834	PL_rs = newSVsv (GvSV (irsgv));	845	PL_rs = newSVsv (GvSV (irsgv));
835	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	846	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
836		847
837	{	848	{
838	dSP;	849	dSP;
839	LOGOP myop;	850	UNOP myop;
840		851
841	Zero (&myop, 1, LOGOP);	852	Zero (&myop, 1, UNOP);
842	myop.op_next = Nullop;	853	myop.op_next = Nullop;
843	myop.op_flags = OPf_WANT_VOID;	854	myop.op_flags = OPf_WANT_VOID;
844		855
845	PUSHMARK (SP);	856	PUSHMARK (SP);
846	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	857	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
849	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	860	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
850	SPAGAIN;	861	SPAGAIN;
851	}	862	}
852		863
853	/* this newly created coroutine might be run on an existing cctx which most	864	/* this newly created coroutine might be run on an existing cctx which most
854	* likely was suspended in set_stacklevel, called from entersub.	865	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
855	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
856	* so we ENTER here for symmetry
857	*/	866	*/
858	ENTER;	867	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		868	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		869
		870	coro_throw = coro->throw;
859	}	871	}
860		872
861	static void	873	static void
862	coro_destruct (pTHX_ struct coro *coro)	874	coro_destruct (pTHX_ struct coro *coro)
863	{	875	{
…		…
887		899
888	SvREFCNT_dec (PL_diehook);	900	SvREFCNT_dec (PL_diehook);
889	SvREFCNT_dec (PL_warnhook);	901	SvREFCNT_dec (PL_warnhook);
890		902
891	SvREFCNT_dec (coro->saved_deffh);	903	SvREFCNT_dec (coro->saved_deffh);
892	SvREFCNT_dec (coro->throw);	904	SvREFCNT_dec (coro_throw);
893		905
894	coro_destruct_stacks (aTHX);	906	coro_destruct_stacks (aTHX);
895	}	907	}
896		908
897	static void	909	INLINE void
898	free_coro_mortal (pTHX)	910	free_coro_mortal (pTHX)
899	{	911	{
900	if (expect_true (coro_mortal))	912	if (expect_true (coro_mortal))
901	{	913	{
902	SvREFCNT_dec (coro_mortal);	914	SvREFCNT_dec (coro_mortal);
…		…
907	static int	919	static int
908	runops_trace (pTHX)	920	runops_trace (pTHX)
909	{	921	{
910	COP *oldcop = 0;	922	COP *oldcop = 0;
911	int oldcxix = -2;	923	int oldcxix = -2;
912	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	924	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
913	coro_cctx *cctx = coro->cctx;	925	coro_cctx *cctx = coro->cctx;
914		926
915	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	927	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
916	{	928	{
917	PERL_ASYNC_CHECK ();	929	PERL_ASYNC_CHECK ();
…		…
1026		1038
1027	TAINT_NOT;	1039	TAINT_NOT;
1028	return 0;	1040	return 0;
1029	}	1041	}
1030		1042
		1043	static void
		1044	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
		1045	{
		1046	ta->prev = (struct coro *)cctx;
		1047	ta->next = 0;
		1048	}
		1049
1031	/* inject a fake call to Coro::State::_cctx_init into the execution */	1050	/* inject a fake call to Coro::State::_cctx_init into the execution */
1032	/* _cctx_init should be careful, as it could be called at almost any time */	1051	/* _cctx_init should be careful, as it could be called at almost any time */
1033	/* during execution of a perl program */	1052	/* during execution of a perl program */
		1053	/* also initialises PL_top_env */
1034	static void NOINLINE	1054	static void NOINLINE
1035	cctx_prepare (pTHX_ coro_cctx *cctx)	1055	cctx_prepare (pTHX_ coro_cctx *cctx)
1036	{	1056	{
1037	dSP;	1057	dSP;
1038	LOGOP myop;	1058	UNOP myop;
1039		1059
1040	PL_top_env = &PL_start_env;	1060	PL_top_env = &PL_start_env;
1041		1061
1042	if (cctx->flags & CC_TRACE)	1062	if (cctx->flags & CC_TRACE)
1043	PL_runops = runops_trace;	1063	PL_runops = runops_trace;
1044		1064
1045	Zero (&myop, 1, LOGOP);	1065	Zero (&myop, 1, UNOP);
1046	myop.op_next = PL_op;	1066	myop.op_next = PL_op;
1047	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1067	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1048		1068
1049	PUSHMARK (SP);	1069	PUSHMARK (SP);
1050	EXTEND (SP, 2);	1070	EXTEND (SP, 2);
1051	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1071	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1052	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1072	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1053	PUTBACK;	1073	PUTBACK;
1054	PL_op = (OP *)&myop;	1074	PL_op = (OP *)&myop;
1055	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1075	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1056	SPAGAIN;	1076	SPAGAIN;
1057	}	1077	}
1058		1078
		1079	/* the tail of transfer: execute stuff we can only do after a transfer */
		1080	INLINE void
		1081	transfer_tail (pTHX)
		1082	{
		1083	free_coro_mortal (aTHX);
		1084	}
		1085
1059	/*	1086	/*
1060	* this is a _very_ stripped down perl interpreter ;)	1087	* this is a _very_ stripped down perl interpreter ;)
1061	*/	1088	*/
1062	static void	1089	static void
1063	cctx_run (void *arg)	1090	cctx_run (void *arg)
…		…
1068	# endif	1095	# endif
1069	#endif	1096	#endif
1070	{	1097	{
1071	dTHX;	1098	dTHX;
1072		1099
1073	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1100	/* normally we would need to skip the entersub here */
1074	UNLOCK;	1101	/* not doing so will re-execute it, which is exactly what we want */
1075
1076	/* we now skip the entersub that lead to transfer() */
1077	PL_op = PL_op->op_next;	1102	/* PL_nop = PL_nop->op_next */
1078		1103
1079	/* inject a fake subroutine call to cctx_init */	1104	/* inject a fake subroutine call to cctx_init */
1080	cctx_prepare (aTHX_ (coro_cctx *)arg);	1105	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1106
		1107	/* cctx_run is the alternative tail of transfer() */
		1108	transfer_tail (aTHX);
1081		1109
1082	/* somebody or something will hit me for both perl_run and PL_restartop */	1110	/* somebody or something will hit me for both perl_run and PL_restartop */
1083	PL_restartop = PL_op;	1111	PL_restartop = PL_op;
1084	perl_run (PL_curinterp);	1112	perl_run (PL_curinterp);
1085		1113
…		…
1097		1125
1098	static coro_cctx *	1126	static coro_cctx *
1099	cctx_new ()	1127	cctx_new ()
1100	{	1128	{
1101	coro_cctx *cctx;	1129	coro_cctx *cctx;
		1130
		1131	++cctx_count;
		1132	New (0, cctx, 1, coro_cctx);
		1133
		1134	cctx->gen = cctx_gen;
		1135	cctx->flags = 0;
		1136	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1137
		1138	return cctx;
		1139	}
		1140
		1141	/* create a new cctx only suitable as source */
		1142	static coro_cctx *
		1143	cctx_new_empty ()
		1144	{
		1145	coro_cctx *cctx = cctx_new ();
		1146
		1147	cctx->sptr = 0;
		1148	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1149
		1150	return cctx;
		1151	}
		1152
		1153	/* create a new cctx suitable as destination/running a perl interpreter */
		1154	static coro_cctx *
		1155	cctx_new_run ()
		1156	{
		1157	coro_cctx *cctx = cctx_new ();
1102	void *stack_start;	1158	void *stack_start;
1103	size_t stack_size;	1159	size_t stack_size;
1104
1105	++cctx_count;
1106	Newz (0, cctx, 1, coro_cctx);
1107
1108	cctx->gen = cctx_gen;
1109		1160
1110	#if HAVE_MMAP	1161	#if HAVE_MMAP
1111	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1162	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1112	/* mmap supposedly does allocate-on-write for us */	1163	/* mmap supposedly does allocate-on-write for us */
1113	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1164	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1114		1165
1115	if (cctx->sptr != (void *)-1)	1166	if (cctx->sptr != (void *)-1)
1116	{	1167	{
1117	# if CORO_STACKGUARD	1168	#if CORO_STACKGUARD
1118	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1169	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1119	# endif	1170	#endif
1120	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1171	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1121	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1172	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1122	cctx->flags |= CC_MAPPED;	1173	cctx->flags |= CC_MAPPED;
1123	}	1174	}
1124	else	1175	else
1125	#endif	1176	#endif
1126	{	1177	{
1127	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1178	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1128	New (0, cctx->sptr, cctx_stacksize, long);	1179	New (0, cctx->sptr, cctx_stacksize, long);
1129		1180
1130	if (!cctx->sptr)	1181	if (!cctx->sptr)
1131	{	1182	{
1132	perror ("FATAL: unable to allocate stack for coroutine");	1183	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1133	_exit (EXIT_FAILURE);	1184	_exit (EXIT_FAILURE);
1134	}	1185	}
1135		1186
1136	stack_start = cctx->sptr;	1187	stack_start = cctx->sptr;
1137	stack_size = cctx->ssize;	1188	stack_size = cctx->ssize;
1138	}	1189	}
1139		1190
1140	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1191	#if CORO_USE_VALGRIND
		1192	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
		1193	#endif
		1194
1141	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1195	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1142		1196
1143	return cctx;	1197	return cctx;
1144	}	1198	}
1145		1199
…		…
1153	coro_destroy (&cctx->cctx);	1207	coro_destroy (&cctx->cctx);
1154		1208
1155	/* coro_transfer creates new, empty cctx's */	1209	/* coro_transfer creates new, empty cctx's */
1156	if (cctx->sptr)	1210	if (cctx->sptr)
1157	{	1211	{
1158	#if CORO_USE_VALGRIND	1212	#if CORO_USE_VALGRIND
1159	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1213	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1160	#endif	1214	#endif
1161		1215
1162	#if HAVE_MMAP	1216	#if HAVE_MMAP
1163	if (cctx->flags & CC_MAPPED)	1217	if (cctx->flags & CC_MAPPED)
1164	munmap (cctx->sptr, cctx->ssize);	1218	munmap (cctx->sptr, cctx->ssize);
1165	else	1219	else
…		…
1186	return cctx;	1240	return cctx;
1187		1241
1188	cctx_destroy (cctx);	1242	cctx_destroy (cctx);
1189	}	1243	}
1190		1244
1191	return cctx_new ();	1245	return cctx_new_run ();
1192	}	1246	}
1193		1247
1194	static void	1248	static void
1195	cctx_put (coro_cctx *cctx)	1249	cctx_put (coro_cctx *cctx)
1196	{	1250	{
1197	assert (("cctx_put called on non-initialised cctx", cctx->sptr));	1251	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1198		1252
1199	/* free another cctx if overlimit */	1253	/* free another cctx if overlimit */
1200	if (expect_false (cctx_idle >= cctx_max_idle))	1254	if (expect_false (cctx_idle >= cctx_max_idle))
1201	{	1255	{
1202	coro_cctx *first = cctx_first;	1256	coro_cctx *first = cctx_first;
…		…
1214	/** coroutine switching *****************************************************/	1268	/** coroutine switching *****************************************************/
1215		1269
1216	static void	1270	static void
1217	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1271	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1218	{	1272	{
		1273	/* TODO: throwing up here is considered harmful */
		1274
1219	if (expect_true (prev != next))	1275	if (expect_true (prev != next))
1220	{	1276	{
1221	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1277	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1222	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1278	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1223		1279
1224	if (expect_false (next->flags & CF_RUNNING))	1280	if (expect_false (next->flags & CF_RUNNING))
1225	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1281	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1226		1282
1227	if (expect_false (next->flags & CF_DESTROYED))	1283	if (expect_false (next->flags & CF_DESTROYED))
1228	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1284	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1229		1285
1230	#if !PERL_VERSION_ATLEAST (5,10,0)	1286	#if !PERL_VERSION_ATLEAST (5,10,0)
1231	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1287	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1232	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1288	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1233	#endif	1289	#endif
1234	}	1290	}
1235	}	1291	}
1236		1292
1237	/* always use the TRANSFER macro */	1293	/* always use the TRANSFER macro */
1238	static void NOINLINE	1294	static void NOINLINE /* noinline so we have a fixed stackframe */
1239	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1295	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1240	{	1296	{
1241	dSTACKLEVEL;	1297	dSTACKLEVEL;
1242		1298
1243	/* sometimes transfer is only called to set idle_sp */	1299	/* sometimes transfer is only called to set idle_sp */
1244	if (expect_false (!next))	1300	if (expect_false (!next))
1245	{	1301	{
1246	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1302	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1247	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1303	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1248	}	1304	}
1249	else if (expect_true (prev != next))	1305	else if (expect_true (prev != next))
1250	{	1306	{
1251	static volatile int has_throw;
1252	coro_cctx *prev__cctx;	1307	coro_cctx *prev__cctx;
1253		1308
1254	if (expect_false (prev->flags & CF_NEW))	1309	if (expect_false (prev->flags & CF_NEW))
1255	{	1310	{
1256	/* create a new empty/source context */	1311	/* create a new empty/source context */
1257	++cctx_count;	1312	prev->cctx = cctx_new_empty ();
1258	New (0, prev->cctx, 1, coro_cctx);
1259	prev->cctx->sptr = 0;
1260	coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1261
1262	prev->flags &= ~CF_NEW;	1313	prev->flags &= ~CF_NEW;
1263	prev->flags |= CF_RUNNING;	1314	prev->flags |= CF_RUNNING;
1264	}	1315	}
1265		1316
1266	prev->flags &= ~CF_RUNNING;	1317	prev->flags &= ~CF_RUNNING;
1267	next->flags |= CF_RUNNING;	1318	next->flags |= CF_RUNNING;
1268
1269	LOCK;
1270		1319
1271	/* first get rid of the old state */	1320	/* first get rid of the old state */
1272	save_perl (aTHX_ prev);	1321	save_perl (aTHX_ prev);
1273		1322
1274	if (expect_false (next->flags & CF_NEW))	1323	if (expect_false (next->flags & CF_NEW))
…		…
1281	else	1330	else
1282	load_perl (aTHX_ next);	1331	load_perl (aTHX_ next);
1283		1332
1284	prev__cctx = prev->cctx;	1333	prev__cctx = prev->cctx;
1285		1334
1286	/* possibly "free" the cctx */	1335	/* possibly untie and reuse the cctx */
1287	if (expect_true (	1336	if (expect_true (
1288	prev__cctx->idle_sp == STACKLEVEL	1337	prev__cctx->idle_sp == (void *)stacklevel
1289	&& !(prev__cctx->flags & CC_TRACE)	1338	&& !(prev__cctx->flags & CC_TRACE)
1290	&& !force_cctx	1339	&& !force_cctx
1291	))	1340	))
1292	{	1341	{
1293	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1342	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1294	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1343	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1295		1344
1296	prev->cctx = 0;	1345	prev->cctx = 0;
1297		1346
1298	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1347	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1299	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1348	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1306		1355
1307	++next->usecount;	1356	++next->usecount;
1308		1357
1309	if (expect_true (!next->cctx))	1358	if (expect_true (!next->cctx))
1310	next->cctx = cctx_get (aTHX);	1359	next->cctx = cctx_get (aTHX);
1311
1312	has_throw = !!next->throw;
1313		1360
1314	if (expect_false (prev__cctx != next->cctx))	1361	if (expect_false (prev__cctx != next->cctx))
1315	{	1362	{
1316	prev__cctx->top_env = PL_top_env;	1363	prev__cctx->top_env = PL_top_env;
1317	PL_top_env = next->cctx->top_env;	1364	PL_top_env = next->cctx->top_env;
1318	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1365	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1319	}	1366	}
1320		1367
1321	free_coro_mortal (aTHX);	1368	transfer_tail (aTHX);
1322	UNLOCK;
1323
1324	if (expect_false (has_throw))
1325	{
1326	struct coro *coro = SvSTATE (coro_current);
1327
1328	if (coro->throw)
1329	{
1330	SV *exception = coro->throw;
1331	coro->throw = 0;
1332	sv_setsv (ERRSV, exception);
1333	croak (0);
1334	}
1335	}
1336	}	1369	}
1337	}	1370	}
1338
1339	struct transfer_args
1340	{
1341	struct coro *prev, *next;
1342	};
1343		1371
1344	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1372	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1345	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1373	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1346		1374
1347	/** high level stuff ********************************************************/	1375	/** high level stuff ********************************************************/
…		…
1349	static int	1377	static int
1350	coro_state_destroy (pTHX_ struct coro *coro)	1378	coro_state_destroy (pTHX_ struct coro *coro)
1351	{	1379	{
1352	if (coro->flags & CF_DESTROYED)	1380	if (coro->flags & CF_DESTROYED)
1353	return 0;	1381	return 0;
		1382
		1383	if (coro->on_destroy)
		1384	coro->on_destroy (aTHX_ coro);
1354		1385
1355	coro->flags |= CF_DESTROYED;	1386	coro->flags |= CF_DESTROYED;
1356		1387
1357	if (coro->flags & CF_READY)	1388	if (coro->flags & CF_READY)
1358	{	1389	{
1359	/* reduce nready, as destroying a ready coro effectively unreadies it */	1390	/* reduce nready, as destroying a ready coro effectively unreadies it */
1360	/* alternative: look through all ready queues and remove the coro */	1391	/* alternative: look through all ready queues and remove the coro */
1361	LOCK;
1362	--coro_nready;	1392	--coro_nready;
1363	UNLOCK;
1364	}	1393	}
1365	else	1394	else
1366	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1395	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1367		1396
1368	if (coro->mainstack && coro->mainstack != main_mainstack)	1397	if (coro->mainstack && coro->mainstack != main_mainstack)
1369	{	1398	{
1370	struct coro temp;	1399	struct coro temp;
1371		1400
1372	if (coro->flags & CF_RUNNING)	1401	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1373	croak ("FATAL: tried to destroy currently running coroutine");
1374		1402
1375	save_perl (aTHX_ &temp);	1403	save_perl (aTHX_ &temp);
1376	load_perl (aTHX_ coro);	1404	load_perl (aTHX_ coro);
1377		1405
1378	coro_destruct (aTHX_ coro);	1406	coro_destruct (aTHX_ coro);
…		…
1429	# define MGf_DUP 0	1457	# define MGf_DUP 0
1430	#endif	1458	#endif
1431	};	1459	};
1432		1460
1433	static void	1461	static void
1434	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1462	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1435	{	1463	{
1436	ta->prev = SvSTATE (prev_sv);	1464	ta->prev = SvSTATE (prev_sv);
1437	ta->next = SvSTATE (next_sv);	1465	ta->next = SvSTATE (next_sv);
1438	TRANSFER_CHECK (*ta);	1466	TRANSFER_CHECK (*ta);
1439	}	1467	}
1440		1468
1441	static void	1469	static void
1442	api_transfer (SV *prev_sv, SV *next_sv)	1470	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1443	{	1471	{
1444	dTHX;
1445	struct transfer_args ta;	1472	struct coro_transfer_args ta;
1446		1473
1447	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1474	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1448	TRANSFER (ta, 1);	1475	TRANSFER (ta, 1);
1449	}	1476	}
1450		1477
1451	/** Coro ********************************************************************/	1478	/** Coro ********************************************************************/
1452		1479
1453	static void	1480	INLINE void
1454	coro_enq (pTHX_ SV *coro_sv)	1481	coro_enq (pTHX_ struct coro *coro)
1455	{	1482	{
1456	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1483	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1457	}	1484	}
1458		1485
1459	static SV *	1486	INLINE SV *
1460	coro_deq (pTHX)	1487	coro_deq (pTHX)
1461	{	1488	{
1462	int prio;	1489	int prio;
1463		1490
1464	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1491	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1467		1494
1468	return 0;	1495	return 0;
1469	}	1496	}
1470		1497
1471	static int	1498	static int
1472	api_ready (SV *coro_sv)	1499	api_ready (pTHX_ SV *coro_sv)
1473	{	1500	{
1474	dTHX;
1475	struct coro *coro;	1501	struct coro *coro;
1476	SV *sv_hook;	1502	SV *sv_hook;
1477	void (*xs_hook)(void);	1503	void (*xs_hook)(void);
1478		1504
1479	if (SvROK (coro_sv))	1505	if (SvROK (coro_sv))
…		…
1484	if (coro->flags & CF_READY)	1510	if (coro->flags & CF_READY)
1485	return 0;	1511	return 0;
1486		1512
1487	coro->flags |= CF_READY;	1513	coro->flags |= CF_READY;
1488		1514
1489	LOCK;
1490
1491	sv_hook = coro_nready ? 0 : coro_readyhook;	1515	sv_hook = coro_nready ? 0 : coro_readyhook;
1492	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1516	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1493		1517
1494	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1518	coro_enq (aTHX_ coro);
1495	++coro_nready;	1519	++coro_nready;
1496		1520
1497	UNLOCK;
1498
1499	if (sv_hook)	1521	if (sv_hook)
1500	{	1522	{
1501	dSP;	1523	dSP;
1502		1524
1503	ENTER;	1525	ENTER;
…		…
1517		1539
1518	return 1;	1540	return 1;
1519	}	1541	}
1520		1542
1521	static int	1543	static int
1522	api_is_ready (SV *coro_sv)	1544	api_is_ready (pTHX_ SV *coro_sv)
1523	{	1545	{
1524	dTHX;
1525	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1546	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1526	}	1547	}
1527		1548
1528	static void	1549	INLINE void
1529	prepare_schedule (pTHX_ struct transfer_args *ta)	1550	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1530	{	1551	{
1531	SV *prev_sv, *next_sv;	1552	SV *prev_sv, *next_sv;
1532		1553
1533	for (;;)	1554	for (;;)
1534	{	1555	{
1535	LOCK;
1536	next_sv = coro_deq (aTHX);	1556	next_sv = coro_deq (aTHX);
1537		1557
1538	/* nothing to schedule: call the idle handler */	1558	/* nothing to schedule: call the idle handler */
1539	if (expect_false (!next_sv))	1559	if (expect_false (!next_sv))
1540	{	1560	{
1541	dSP;	1561	dSP;
1542	UNLOCK;
1543		1562
1544	ENTER;	1563	ENTER;
1545	SAVETMPS;	1564	SAVETMPS;
1546		1565
1547	PUSHMARK (SP);	1566	PUSHMARK (SP);
…		…
1552	FREETMPS;	1571	FREETMPS;
1553	LEAVE;	1572	LEAVE;
1554	continue;	1573	continue;
1555	}	1574	}
1556		1575
1557	ta->next = SvSTATE (next_sv);	1576	ta->next = SvSTATE_hv (next_sv);
1558		1577
1559	/* cannot transfer to destroyed coros, skip and look for next */	1578	/* cannot transfer to destroyed coros, skip and look for next */
1560	if (expect_false (ta->next->flags & CF_DESTROYED))	1579	if (expect_false (ta->next->flags & CF_DESTROYED))
1561	{	1580	{
1562	UNLOCK;
1563	SvREFCNT_dec (next_sv);	1581	SvREFCNT_dec (next_sv);
1564	/* coro_nready is already taken care of by destroy */	1582	/* coro_nready has already been taken care of by destroy */
1565	continue;	1583	continue;
1566	}	1584	}
1567		1585
1568	--coro_nready;	1586	--coro_nready;
1569	UNLOCK;
1570	break;	1587	break;
1571	}	1588	}
1572		1589
1573	/* free this only after the transfer */	1590	/* free this only after the transfer */
1574	prev_sv = SvRV (coro_current);	1591	prev_sv = SvRV (coro_current);
1575	ta->prev = SvSTATE (prev_sv);	1592	ta->prev = SvSTATE_hv (prev_sv);
1576	TRANSFER_CHECK (*ta);	1593	TRANSFER_CHECK (*ta);
1577	assert (ta->next->flags & CF_READY);	1594	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1578	ta->next->flags &= ~CF_READY;	1595	ta->next->flags &= ~CF_READY;
1579	SvRV_set (coro_current, next_sv);	1596	SvRV_set (coro_current, next_sv);
1580		1597
1581	LOCK;
1582	free_coro_mortal (aTHX);	1598	free_coro_mortal (aTHX);
1583	coro_mortal = prev_sv;	1599	coro_mortal = prev_sv;
1584	UNLOCK;
1585	}	1600	}
1586		1601
1587	static void	1602	INLINE void
1588	prepare_cede (pTHX_ struct transfer_args *ta)	1603	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1589	{	1604	{
1590	api_ready (coro_current);	1605	api_ready (aTHX_ coro_current);
1591	prepare_schedule (aTHX_ ta);	1606	prepare_schedule (aTHX_ ta);
1592	}	1607	}
1593		1608
		1609	INLINE void
		1610	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1611	{
		1612	SV *prev = SvRV (coro_current);
		1613
		1614	if (coro_nready)
		1615	{
		1616	prepare_schedule (aTHX_ ta);
		1617	api_ready (aTHX_ prev);
		1618	}
		1619	else
		1620	prepare_nop (aTHX_ ta);
		1621	}
		1622
		1623	static void
		1624	api_schedule (pTHX)
		1625	{
		1626	struct coro_transfer_args ta;
		1627
		1628	prepare_schedule (aTHX_ &ta);
		1629	TRANSFER (ta, 1);
		1630	}
		1631
1594	static int	1632	static int
1595	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1633	api_cede (pTHX)
1596	{	1634	{
1597	if (coro_nready)	1635	struct coro_transfer_args ta;
1598	{	1636
1599	SV *prev = SvRV (coro_current);
1600	prepare_schedule (aTHX_ ta);	1637	prepare_cede (aTHX_ &ta);
1601	api_ready (prev);	1638
		1639	if (expect_true (ta.prev != ta.next))
		1640	{
		1641	TRANSFER (ta, 1);
1602	return 1;	1642	return 1;
1603	}	1643	}
1604	else	1644	else
1605	return 0;	1645	return 0;
1606	}	1646	}
1607		1647
1608	static void
1609	api_schedule (void)
1610	{
1611	dTHX;
1612	struct transfer_args ta;
1613
1614	prepare_schedule (aTHX_ &ta);
1615	TRANSFER (ta, 1);
1616	}
1617
1618	static int	1648	static int
1619	api_cede (void)	1649	api_cede_notself (pTHX)
1620	{	1650	{
1621	dTHX;	1651	if (coro_nready)
		1652	{
1622	struct transfer_args ta;	1653	struct coro_transfer_args ta;
1623		1654
1624	prepare_cede (aTHX_ &ta);	1655	prepare_cede_notself (aTHX_ &ta);
1625
1626	if (expect_true (ta.prev != ta.next))
1627	{
1628	TRANSFER (ta, 1);	1656	TRANSFER (ta, 1);
1629	return 1;	1657	return 1;
1630	}	1658	}
1631	else	1659	else
1632	return 0;	1660	return 0;
1633	}	1661	}
1634		1662
1635	static int	1663	static void
1636	api_cede_notself (void)
1637	{
1638	dTHX;
1639	struct transfer_args ta;
1640
1641	if (prepare_cede_notself (aTHX_ &ta))
1642	{
1643	TRANSFER (ta, 1);
1644	return 1;
1645	}
1646	else
1647	return 0;
1648	}
1649
1650	static void
1651	api_trace (SV *coro_sv, int flags)	1664	api_trace (pTHX_ SV *coro_sv, int flags)
1652	{	1665	{
1653	dTHX;
1654	struct coro *coro = SvSTATE (coro_sv);	1666	struct coro *coro = SvSTATE (coro_sv);
1655		1667
1656	if (flags & CC_TRACE)	1668	if (flags & CC_TRACE)
1657	{	1669	{
1658	if (!coro->cctx)	1670	if (!coro->cctx)
1659	coro->cctx = cctx_new ();	1671	coro->cctx = cctx_new_run ();
1660	else if (!(coro->cctx->flags & CC_TRACE))	1672	else if (!(coro->cctx->flags & CC_TRACE))
1661	croak ("cannot enable tracing on coroutine with custom stack");	1673	croak ("cannot enable tracing on coroutine with custom stack,");
1662		1674
1663	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1675	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1664	}	1676	}
1665	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1677	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1666	{	1678	{
…		…
1671	else	1683	else
1672	coro->slot->runops = RUNOPS_DEFAULT;	1684	coro->slot->runops = RUNOPS_DEFAULT;
1673	}	1685	}
1674	}	1686	}
1675		1687
1676	#if 0	1688	/*****************************************************************************/
		1689	/* schedule-like-function opcode (SLF) */
		1690
		1691	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1692	static const CV *slf_cv;
		1693	static SV **slf_argv;
		1694	static int slf_argc, slf_arga; /* count, allocated */
		1695	static I32 slf_ax; /* top of stack, for restore */
		1696
		1697	/* this restores the stack in the case we patched the entersub, to */
		1698	/* recreate the stack frame as perl will on following calls */
		1699	/* since entersub cleared the stack */
		1700	static OP *
		1701	pp_restore (pTHX)
		1702	{
		1703	int i;
		1704	SV **SP = PL_stack_base + slf_ax;
		1705
		1706	PUSHMARK (SP);
		1707
		1708	EXTEND (SP, slf_argc + 1);
		1709
		1710	for (i = 0; i < slf_argc; ++i)
		1711	PUSHs (sv_2mortal (slf_argv [i]));
		1712
		1713	PUSHs ((SV *)CvGV (slf_cv));
		1714
		1715	RETURNOP (slf_restore.op_first);
		1716	}
		1717
1677	static int	1718	static void
1678	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1719	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1679	{	1720	{
1680	AV *padlist;	1721	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1681	AV *av = (AV *)mg->mg_obj;
1682
1683	abort ();
1684
1685	return 0;
1686	}	1722	}
1687		1723
1688	static MGVTBL coro_gensub_vtbl = {	1724	static void
1689	0, 0, 0, 0,	1725	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1690	coro_gensub_free	1726	{
1691	};	1727	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1692	#endif	1728
		1729	frame->prepare = slf_prepare_set_stacklevel;
		1730	frame->check = slf_check_nop;
		1731	frame->data = (void *)SvIV (arg [0]);
		1732	}
		1733
		1734	static void
		1735	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1736	{
		1737	SV **arg = (SV **)slf_frame.data;
		1738
		1739	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1740	}
		1741
		1742	static void
		1743	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1744	{
		1745	if (items != 2)
		1746	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1747
		1748	frame->prepare = slf_prepare_transfer;
		1749	frame->check = slf_check_nop;
		1750	frame->data = (void *)arg; /* let's hope it will stay valid */
		1751	}
		1752
		1753	static void
		1754	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1755	{
		1756	frame->prepare = prepare_schedule;
		1757	frame->check = slf_check_nop;
		1758	}
		1759
		1760	static void
		1761	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1762	{
		1763	frame->prepare = prepare_cede;
		1764	frame->check = slf_check_nop;
		1765	}
		1766
		1767	static void
		1768	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1769	{
		1770	frame->prepare = prepare_cede_notself;
		1771	frame->check = slf_check_nop;
		1772	}
		1773
		1774	/* we hijack an hopefully unused CV flag for our purposes */
		1775	#define CVf_SLF 0x4000
		1776
		1777	/*
		1778	* these not obviously related functions are all rolled into one
		1779	* function to increase chances that they all will call transfer with the same
		1780	* stack offset
		1781	* SLF stands for "schedule-like-function".
		1782	*/
		1783	static OP *
		1784	pp_slf (pTHX)
		1785	{
		1786	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1787
		1788	/* set up the slf frame, unless it has already been set-up */
		1789	/* the latter happens when a new coro has been started */
		1790	/* or when a new cctx was attached to an existing coroutine */
		1791	if (expect_true (!slf_frame.prepare))
		1792	{
		1793	/* first iteration */
		1794	dSP;
		1795	SV **arg = PL_stack_base + TOPMARK + 1;
		1796	int items = SP - arg; /* args without function object */
		1797	SV *gv = *sp;
		1798
		1799	/* do a quick consistency check on the "function" object, and if it isn't */
		1800	/* for us, divert to the real entersub */
		1801	if (SvTYPE (gv) != SVt_PVGV
		1802	|| !GvCV (gv)
		1803	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1804	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1805
		1806	if (!(PL_op->op_flags & OPf_STACKED))
		1807	{
		1808	/* ampersand-form of call, use @_ instead of stack */
		1809	AV *av = GvAV (PL_defgv);
		1810	arg = AvARRAY (av);
		1811	items = AvFILLp (av) + 1;
		1812	}
		1813
		1814	/* now call the init function, which needs to set up slf_frame */
		1815	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1816	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1817
		1818	/* pop args */
		1819	SP = PL_stack_base + POPMARK;
		1820
		1821	PUTBACK;
		1822	}
		1823
		1824	/* now that we have a slf_frame, interpret it! */
		1825	/* we use a callback system not to make the code needlessly */
		1826	/* complicated, but so we can run multiple perl coros from one cctx */
		1827
		1828	do
		1829	{
		1830	struct coro_transfer_args ta;
		1831
		1832	slf_frame.prepare (aTHX_ &ta);
		1833	TRANSFER (ta, 0);
		1834
		1835	checkmark = PL_stack_sp - PL_stack_base;
		1836	}
		1837	while (slf_frame.check (aTHX_ &slf_frame));
		1838
		1839	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1840
		1841	/* return value handling - mostly like entersub */
		1842	{
		1843	dSP;
		1844	SV **bot = PL_stack_base + checkmark;
		1845	int gimme = GIMME_V;
		1846
		1847	/* make sure we put something on the stack in scalar context */
		1848	if (gimme == G_SCALAR)
		1849	{
		1850	if (sp == bot)
		1851	XPUSHs (&PL_sv_undef);
		1852
		1853	SP = bot + 1;
		1854	}
		1855
		1856	PUTBACK;
		1857	}
		1858
		1859	/* exception handling */
		1860	if (expect_false (coro_throw))
		1861	{
		1862	SV *exception = sv_2mortal (coro_throw);
		1863
		1864	coro_throw = 0;
		1865	sv_setsv (ERRSV, exception);
		1866	croak (0);
		1867	}
		1868
		1869	return NORMAL;
		1870	}
		1871
		1872	static void
		1873	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1874	{
		1875	int i;
		1876	SV **arg = PL_stack_base + ax;
		1877	int items = PL_stack_sp - arg + 1;
		1878
		1879	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1880
		1881	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1882	&& PL_op->op_ppaddr != pp_slf)
		1883	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1884
		1885	CvFLAGS (cv) |= CVf_SLF;
		1886	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1887	slf_cv = cv;
		1888
		1889	/* we patch the op, and then re-run the whole call */
		1890	/* we have to put the same argument on the stack for this to work */
		1891	/* and this will be done by pp_restore */
		1892	slf_restore.op_next = (OP *)&slf_restore;
		1893	slf_restore.op_type = OP_CUSTOM;
		1894	slf_restore.op_ppaddr = pp_restore;
		1895	slf_restore.op_first = PL_op;
		1896
		1897	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1898
		1899	if (PL_op->op_flags & OPf_STACKED)
		1900	{
		1901	if (items > slf_arga)
		1902	{
		1903	slf_arga = items;
		1904	free (slf_argv);
		1905	slf_argv = malloc (slf_arga * sizeof (SV *));
		1906	}
		1907
		1908	slf_argc = items;
		1909
		1910	for (i = 0; i < items; ++i)
		1911	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1912	}
		1913	else
		1914	slf_argc = 0;
		1915
		1916	PL_op->op_ppaddr = pp_slf;
		1917	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1918
		1919	PL_op = (OP *)&slf_restore;
		1920	}
1693		1921
1694	/*****************************************************************************/	1922	/*****************************************************************************/
1695	/* PerlIO::cede */	1923	/* PerlIO::cede */
1696		1924
1697	typedef struct	1925	typedef struct
…		…
1725	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1953	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726	double now = nvtime ();	1954	double now = nvtime ();
1727		1955
1728	if (now >= self->next)	1956	if (now >= self->next)
1729	{	1957	{
1730	api_cede ();	1958	api_cede (aTHX);
1731	self->next = now + self->every;	1959	self->next = now + self->every;
1732	}	1960	}
1733		1961
1734	return PerlIOBuf_flush (aTHX_ f);	1962	return PerlIOBuf_flush (aTHX_ f);
1735	}	1963	}
…		…
1764	PerlIOBuf_get_ptr,	1992	PerlIOBuf_get_ptr,
1765	PerlIOBuf_get_cnt,	1993	PerlIOBuf_get_cnt,
1766	PerlIOBuf_set_ptrcnt,	1994	PerlIOBuf_set_ptrcnt,
1767	};	1995	};
1768		1996
		1997	/*****************************************************************************/
		1998	/* Coro::Semaphore */
		1999
		2000	static void
		2001	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2002	{
		2003	SV *count_sv = AvARRAY (av)[0];
		2004	IV count = SvIVX (count_sv);
		2005
		2006	count += adjust;
		2007	SvIVX (count_sv) = count;
		2008
		2009	/* now wake up as many waiters as are expected to lock */
		2010	while (count > 0 && AvFILLp (av) > 0)
		2011	{
		2012	SV *cb;
		2013
		2014	/* swap first two elements so we can shift a waiter */
		2015	AvARRAY (av)[0] = AvARRAY (av)[1];
		2016	AvARRAY (av)[1] = count_sv;
		2017	cb = av_shift (av);
		2018
		2019	if (SvOBJECT (cb))
		2020	api_ready (aTHX_ cb);
		2021	else
		2022	croak ("callbacks not yet supported");
		2023
		2024	SvREFCNT_dec (cb);
		2025
		2026	--count;
		2027	}
		2028	}
		2029
		2030	static void
		2031	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2032	{
		2033	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2034	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2035	}
		2036
		2037	static int
		2038	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2039	{
		2040	AV *av = (AV *)frame->data;
		2041	SV *count_sv = AvARRAY (av)[0];
		2042
		2043	if (SvIVX (count_sv) > 0)
		2044	{
		2045	SvSTATE_current->on_destroy = 0;
		2046	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2047	return 0;
		2048	}
		2049	else
		2050	{
		2051	int i;
		2052	/* if we were woken up but can't down, we look through the whole */
		2053	/* waiters list and only add us if we aren't in there already */
		2054	/* this avoids some degenerate memory usage cases */
		2055
		2056	for (i = 1; i <= AvFILLp (av); ++i)
		2057	if (AvARRAY (av)[i] == SvRV (coro_current))
		2058	return 1;
		2059
		2060	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2061	return 1;
		2062	}
		2063	}
		2064
		2065	static void
		2066	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2067	{
		2068	AV *av = (AV *)SvRV (arg [0]);
		2069
		2070	if (SvIVX (AvARRAY (av)[0]) > 0)
		2071	{
		2072	frame->data = (void *)av;
		2073	frame->prepare = prepare_nop;
		2074	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2075	}
		2076	else
		2077	{
		2078	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2079
		2080	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2081	frame->prepare = prepare_schedule;
		2082
		2083	/* to avoid race conditions when a woken-up coro gets terminated */
		2084	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2085	assert (!SvSTATE_current->on_destroy);//D
		2086	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2087	}
		2088
		2089	frame->check = slf_check_semaphore_down;
		2090
		2091	}
		2092
		2093	/*****************************************************************************/
		2094	/* gensub: simple closure generation utility */
		2095
		2096	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2097
		2098	/* create a closure from XS, returns a code reference */
		2099	/* the arg can be accessed via GENSUB_ARG from the callback */
		2100	/* the callback must use dXSARGS/XSRETURN */
		2101	static SV *
		2102	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2103	{
		2104	CV *cv = (CV *)newSV (0);
		2105
		2106	sv_upgrade ((SV *)cv, SVt_PVCV);
		2107
		2108	CvANON_on (cv);
		2109	CvISXSUB_on (cv);
		2110	CvXSUB (cv) = xsub;
		2111	GENSUB_ARG = arg;
		2112
		2113	return newRV_noinc ((SV *)cv);
		2114	}
		2115
		2116	/*****************************************************************************/
		2117	/* Coro::AIO */
		2118
		2119	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2120
		2121	/* helper storage struct */
		2122	struct io_state
		2123	{
		2124	int errorno;
		2125	I32 laststype; /* U16 in 5.10.0 */
		2126	int laststatval;
		2127	Stat_t statcache;
		2128	};
		2129
		2130	static void
		2131	coro_aio_callback (pTHX_ CV *cv)
		2132	{
		2133	dXSARGS;
		2134	AV *state = (AV *)GENSUB_ARG;
		2135	SV *coro = av_pop (state);
		2136	SV *data_sv = newSV (sizeof (struct io_state));
		2137
		2138	av_extend (state, items);
		2139
		2140	sv_upgrade (data_sv, SVt_PV);
		2141	SvCUR_set (data_sv, sizeof (struct io_state));
		2142	SvPOK_only (data_sv);
		2143
		2144	{
		2145	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2146
		2147	data->errorno = errno;
		2148	data->laststype = PL_laststype;
		2149	data->laststatval = PL_laststatval;
		2150	data->statcache = PL_statcache;
		2151	}
		2152
		2153	/* now build the result vector out of all the parameters and the data_sv */
		2154	{
		2155	int i;
		2156
		2157	for (i = 0; i < items; ++i)
		2158	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2159	}
		2160
		2161	av_push (state, data_sv);
		2162
		2163	api_ready (aTHX_ coro);
		2164	SvREFCNT_dec (coro);
		2165	SvREFCNT_dec ((AV *)state);
		2166	}
		2167
		2168	static int
		2169	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2170	{
		2171	AV *state = (AV *)frame->data;
		2172
		2173	/* one element that is an RV? repeat! */
		2174	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2175	return 1;
		2176
		2177	/* restore status */
		2178	{
		2179	SV *data_sv = av_pop (state);
		2180	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2181
		2182	errno = data->errorno;
		2183	PL_laststype = data->laststype;
		2184	PL_laststatval = data->laststatval;
		2185	PL_statcache = data->statcache;
		2186
		2187	SvREFCNT_dec (data_sv);
		2188	}
		2189
		2190	/* push result values */
		2191	{
		2192	dSP;
		2193	int i;
		2194
		2195	EXTEND (SP, AvFILLp (state) + 1);
		2196	for (i = 0; i <= AvFILLp (state); ++i)
		2197	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2198
		2199	PUTBACK;
		2200	}
		2201
		2202	return 0;
		2203	}
		2204
		2205	static void
		2206	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2207	{
		2208	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2209	SV *coro_hv = SvRV (coro_current);
		2210	struct coro *coro = SvSTATE_hv (coro_hv);
		2211
		2212	/* put our coroutine id on the state arg */
		2213	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2214
		2215	/* first see whether we have a non-zero priority and set it as AIO prio */
		2216	if (coro->prio)
		2217	{
		2218	dSP;
		2219
		2220	static SV *prio_cv;
		2221	static SV *prio_sv;
		2222
		2223	if (expect_false (!prio_cv))
		2224	{
		2225	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2226	prio_sv = newSViv (0);
		2227	}
		2228
		2229	PUSHMARK (SP);
		2230	sv_setiv (prio_sv, coro->prio);
		2231	XPUSHs (prio_sv);
		2232
		2233	PUTBACK;
		2234	call_sv (prio_cv, G_VOID | G_DISCARD);
		2235	}
		2236
		2237	/* now call the original request */
		2238	{
		2239	dSP;
		2240	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2241	int i;
		2242
		2243	PUSHMARK (SP);
		2244
		2245	/* first push all args to the stack */
		2246	EXTEND (SP, items + 1);
		2247
		2248	for (i = 0; i < items; ++i)
		2249	PUSHs (arg [i]);
		2250
		2251	/* now push the callback closure */
		2252	PUSHs (sv_2mortal (gensub (coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
		2253
		2254	/* now call the AIO function - we assume our request is uncancelable */
		2255	PUTBACK;
		2256	call_sv ((SV *)req, G_VOID | G_DISCARD);
		2257	}
		2258
		2259	/* now that the requets is going, we loop toll we have a result */
		2260	frame->data = (void *)state;
		2261	frame->prepare = prepare_schedule;
		2262	frame->check = slf_check_aio_req;
		2263	}
		2264
		2265	static void
		2266	coro_aio_req_xs (pTHX_ CV *cv)
		2267	{
		2268	dVAR;
		2269	dXSARGS;
		2270
		2271	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2272
		2273	XSRETURN_EMPTY;
		2274	}
		2275
		2276	/*****************************************************************************/
1769		2277
1770	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2278	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1771		2279
1772	PROTOTYPES: DISABLE	2280	PROTOTYPES: DISABLE
1773		2281
1774	BOOT:	2282	BOOT:
1775	{	2283	{
1776	#ifdef USE_ITHREADS	2284	#ifdef USE_ITHREADS
1777	MUTEX_INIT (&coro_lock);
1778	# if CORO_PTHREAD	2285	# if CORO_PTHREAD
1779	coro_thx = PERL_GET_CONTEXT;	2286	coro_thx = PERL_GET_CONTEXT;
1780	# endif	2287	# endif
1781	#endif	2288	#endif
1782	BOOT_PAGESIZE;	2289	BOOT_PAGESIZE;
…		…
1803	main_top_env = PL_top_env;	2310	main_top_env = PL_top_env;
1804		2311
1805	while (main_top_env->je_prev)	2312	while (main_top_env->je_prev)
1806	main_top_env = main_top_env->je_prev;	2313	main_top_env = main_top_env->je_prev;
1807		2314
		2315	{
		2316	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2317
		2318	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2319	hv_store_ent (PL_custom_op_names, slf,
		2320	newSVpv ("coro_slf", 0), 0);
		2321
		2322	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2323	hv_store_ent (PL_custom_op_descs, slf,
		2324	newSVpv ("coro schedule like function", 0), 0);
		2325	}
		2326
1808	coroapi.ver = CORO_API_VERSION;	2327	coroapi.ver = CORO_API_VERSION;
1809	coroapi.rev = CORO_API_REVISION;	2328	coroapi.rev = CORO_API_REVISION;
		2329
1810	coroapi.transfer = api_transfer;	2330	coroapi.transfer = api_transfer;
		2331
		2332	coroapi.sv_state = SvSTATE_;
		2333	coroapi.execute_slf = api_execute_slf;
		2334	coroapi.prepare_nop = prepare_nop;
		2335	coroapi.prepare_schedule = prepare_schedule;
		2336	coroapi.prepare_cede = prepare_cede;
		2337	coroapi.prepare_cede_notself = prepare_cede_notself;
1811		2338
1812	{	2339	{
1813	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2340	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1814		2341
1815	if (!svp) croak ("Time::HiRes is required");	2342	if (!svp) croak ("Time::HiRes is required");
…		…
1848	av_push (coro->args, newSVsv (ST (i)));	2375	av_push (coro->args, newSVsv (ST (i)));
1849	}	2376	}
1850	OUTPUT:	2377	OUTPUT:
1851	RETVAL	2378	RETVAL
1852		2379
1853	# these not obviously related functions are all rolled into the same xs
1854	# function to increase chances that they all will call transfer with the same
1855	# stack offset
1856	void	2380	void
1857	_set_stacklevel (...)	2381	_set_stacklevel (...)
1858	ALIAS:	2382	CODE:
1859	Coro::State::transfer = 1	2383	CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1860	Coro::schedule = 2
1861	Coro::cede = 3
1862	Coro::cede_notself = 4
1863	CODE:
1864	{
1865	struct transfer_args ta;
1866		2384
1867	PUTBACK;	2385	void
1868	switch (ix)	2386	transfer (...)
1869	{	2387	PROTOTYPE: $$
1870	case 0:	2388	CODE:
1871	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	2389	CORO_EXECUTE_SLF_XS (slf_init_transfer);
1872	ta.next = 0;
1873	break;
1874
1875	case 1:
1876	if (items != 2)
1877	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1878
1879	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1880	break;
1881
1882	case 2:
1883	prepare_schedule (aTHX_ &ta);
1884	break;
1885
1886	case 3:
1887	prepare_cede (aTHX_ &ta);
1888	break;
1889
1890	case 4:
1891	if (!prepare_cede_notself (aTHX_ &ta))
1892	XSRETURN_EMPTY;
1893
1894	break;
1895	}
1896	SPAGAIN;
1897
1898	BARRIER;
1899	PUTBACK;
1900	TRANSFER (ta, 0);
1901	SPAGAIN; /* might be the sp of a different coroutine now */
1902	/* be extra careful not to ever do anything after TRANSFER */
1903	}
1904		2390
1905	bool	2391	bool
1906	_destroy (SV *coro_sv)	2392	_destroy (SV *coro_sv)
1907	CODE:	2393	CODE:
1908	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2394	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1915	CODE:	2401	CODE:
1916	_exit (code);	2402	_exit (code);
1917		2403
1918	int	2404	int
1919	cctx_stacksize (int new_stacksize = 0)	2405	cctx_stacksize (int new_stacksize = 0)
		2406	PROTOTYPE: ;$
1920	CODE:	2407	CODE:
1921	RETVAL = cctx_stacksize;	2408	RETVAL = cctx_stacksize;
1922	if (new_stacksize)	2409	if (new_stacksize)
1923	{	2410	{
1924	cctx_stacksize = new_stacksize;	2411	cctx_stacksize = new_stacksize;
…		…
1927	OUTPUT:	2414	OUTPUT:
1928	RETVAL	2415	RETVAL
1929		2416
1930	int	2417	int
1931	cctx_max_idle (int max_idle = 0)	2418	cctx_max_idle (int max_idle = 0)
		2419	PROTOTYPE: ;$
1932	CODE:	2420	CODE:
1933	RETVAL = cctx_max_idle;	2421	RETVAL = cctx_max_idle;
1934	if (max_idle > 1)	2422	if (max_idle > 1)
1935	cctx_max_idle = max_idle;	2423	cctx_max_idle = max_idle;
1936	OUTPUT:	2424	OUTPUT:
1937	RETVAL	2425	RETVAL
1938		2426
1939	int	2427	int
1940	cctx_count ()	2428	cctx_count ()
		2429	PROTOTYPE:
1941	CODE:	2430	CODE:
1942	RETVAL = cctx_count;	2431	RETVAL = cctx_count;
1943	OUTPUT:	2432	OUTPUT:
1944	RETVAL	2433	RETVAL
1945		2434
1946	int	2435	int
1947	cctx_idle ()	2436	cctx_idle ()
		2437	PROTOTYPE:
1948	CODE:	2438	CODE:
1949	RETVAL = cctx_idle;	2439	RETVAL = cctx_idle;
1950	OUTPUT:	2440	OUTPUT:
1951	RETVAL	2441	RETVAL
1952		2442
1953	void	2443	void
1954	list ()	2444	list ()
		2445	PROTOTYPE:
1955	PPCODE:	2446	PPCODE:
1956	{	2447	{
1957	struct coro *coro;	2448	struct coro *coro;
1958	for (coro = coro_first; coro; coro = coro->next)	2449	for (coro = coro_first; coro; coro = coro->next)
1959	if (coro->hv)	2450	if (coro->hv)
…		…
2018	RETVAL = boolSV (coro->flags & ix);	2509	RETVAL = boolSV (coro->flags & ix);
2019	OUTPUT:	2510	OUTPUT:
2020	RETVAL	2511	RETVAL
2021		2512
2022	void	2513	void
		2514	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2515	PROTOTYPE: $;$
		2516	CODE:
		2517	{
		2518	struct coro *current = SvSTATE_current;
		2519	SV **throwp = self == current ? &coro_throw : &self->throw;
		2520	SvREFCNT_dec (*throwp);
		2521	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2522	}
		2523
		2524	void
2023	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2525	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2526	PROTOTYPE: $;$
		2527	C_ARGS: aTHX_ coro, flags
2024		2528
2025	SV *	2529	SV *
2026	has_cctx (Coro::State coro)	2530	has_cctx (Coro::State coro)
2027	PROTOTYPE: $	2531	PROTOTYPE: $
2028	CODE:	2532	CODE:
…		…
2052	OUTPUT:	2556	OUTPUT:
2053	RETVAL	2557	RETVAL
2054		2558
2055	void	2559	void
2056	force_cctx ()	2560	force_cctx ()
		2561	PROTOTYPE:
2057	CODE:	2562	CODE:
2058	struct coro *coro = SvSTATE (coro_current);
2059	coro->cctx->idle_sp = 0;	2563	SvSTATE_current->cctx->idle_sp = 0;
2060		2564
2061	void	2565	void
2062	swap_defsv (Coro::State self)	2566	swap_defsv (Coro::State self)
2063	PROTOTYPE: $	2567	PROTOTYPE: $
2064	ALIAS:	2568	ALIAS:
2065	swap_defav = 1	2569	swap_defav = 1
2066	CODE:	2570	CODE:
2067	if (!self->slot)	2571	if (!self->slot)
2068	croak ("cannot swap state with coroutine that has no saved state");	2572	croak ("cannot swap state with coroutine that has no saved state,");
2069	else	2573	else
2070	{	2574	{
2071	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2575	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2072	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2576	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2073		2577
2074	SV *tmp = *src; *src = *dst; *dst = tmp;	2578	SV *tmp = *src; *src = *dst; *dst = tmp;
2075	}	2579	}
		2580
2076		2581
2077	MODULE = Coro::State PACKAGE = Coro	2582	MODULE = Coro::State PACKAGE = Coro
2078		2583
2079	BOOT:	2584	BOOT:
2080	{	2585	{
…		…
2098		2603
2099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2604	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2100	coro_ready[i] = newAV ();	2605	coro_ready[i] = newAV ();
2101		2606
2102	{	2607	{
2103	SV *sv = perl_get_sv ("Coro::API", TRUE);	2608	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2104	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2105		2609
2106	coroapi.schedule = api_schedule;	2610	coroapi.schedule = api_schedule;
2107	coroapi.cede = api_cede;	2611	coroapi.cede = api_cede;
2108	coroapi.cede_notself = api_cede_notself;	2612	coroapi.cede_notself = api_cede_notself;
2109	coroapi.ready = api_ready;	2613	coroapi.ready = api_ready;
2110	coroapi.is_ready = api_is_ready;	2614	coroapi.is_ready = api_is_ready;
2111	coroapi.nready = &coro_nready;	2615	coroapi.nready = coro_nready;
2112	coroapi.current = coro_current;	2616	coroapi.current = coro_current;
2113		2617
2114	GCoroAPI = &coroapi;	2618	GCoroAPI = &coroapi;
2115	sv_setiv (sv, (IV)&coroapi);	2619	sv_setiv (sv, (IV)&coroapi);
2116	SvREADONLY_on (sv);	2620	SvREADONLY_on (sv);
2117	}	2621	}
2118	}	2622	}
		2623
		2624	void
		2625	schedule (...)
		2626	CODE:
		2627	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2628
		2629	void
		2630	cede (...)
		2631	CODE:
		2632	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2633
		2634	void
		2635	cede_notself (...)
		2636	CODE:
		2637	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2119		2638
2120	void	2639	void
2121	_set_current (SV *current)	2640	_set_current (SV *current)
2122	PROTOTYPE: $	2641	PROTOTYPE: $
2123	CODE:	2642	CODE:
…		…
2126		2645
2127	void	2646	void
2128	_set_readyhook (SV *hook)	2647	_set_readyhook (SV *hook)
2129	PROTOTYPE: $	2648	PROTOTYPE: $
2130	CODE:	2649	CODE:
2131	LOCK;
2132	SvREFCNT_dec (coro_readyhook);	2650	SvREFCNT_dec (coro_readyhook);
2133	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2651	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2134	UNLOCK;
2135		2652
2136	int	2653	int
2137	prio (Coro::State coro, int newprio = 0)	2654	prio (Coro::State coro, int newprio = 0)
		2655	PROTOTYPE: $;$
2138	ALIAS:	2656	ALIAS:
2139	nice = 1	2657	nice = 1
2140	CODE:	2658	CODE:
2141	{	2659	{
2142	RETVAL = coro->prio;	2660	RETVAL = coro->prio;
…		…
2157		2675
2158	SV *	2676	SV *
2159	ready (SV *self)	2677	ready (SV *self)
2160	PROTOTYPE: $	2678	PROTOTYPE: $
2161	CODE:	2679	CODE:
2162	RETVAL = boolSV (api_ready (self));	2680	RETVAL = boolSV (api_ready (aTHX_ self));
2163	OUTPUT:	2681	OUTPUT:
2164	RETVAL	2682	RETVAL
2165		2683
2166	int	2684	int
2167	nready (...)	2685	nready (...)
…		…
2169	CODE:	2687	CODE:
2170	RETVAL = coro_nready;	2688	RETVAL = coro_nready;
2171	OUTPUT:	2689	OUTPUT:
2172	RETVAL	2690	RETVAL
2173		2691
2174	void
2175	throw (Coro::State self, SV *throw = &PL_sv_undef)
2176	PROTOTYPE: $;$
2177	CODE:
2178	SvREFCNT_dec (self->throw);
2179	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2180
2181	# for async_pool speedup	2692	# for async_pool speedup
2182	void	2693	void
2183	_pool_1 (SV *cb)	2694	_pool_1 (SV *cb)
2184	CODE:	2695	CODE:
2185	{	2696	{
2186	struct coro *coro = SvSTATE (coro_current);
2187	HV *hv = (HV *)SvRV (coro_current);	2697	HV *hv = (HV *)SvRV (coro_current);
		2698	struct coro *coro = SvSTATE_hv ((SV *)hv);
2188	AV *defav = GvAV (PL_defgv);	2699	AV *defav = GvAV (PL_defgv);
2189	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2700	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2190	AV *invoke_av;	2701	AV *invoke_av;
2191	int i, len;	2702	int i, len;
2192		2703
…		…
2213	{	2724	{
2214	av_fill (defav, len - 1);	2725	av_fill (defav, len - 1);
2215	for (i = 0; i < len; ++i)	2726	for (i = 0; i < len; ++i)
2216	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2727	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2217	}	2728	}
2218
2219	SvREFCNT_dec (invoke);
2220	}	2729	}
2221		2730
2222	void	2731	void
2223	_pool_2 (SV *cb)	2732	_pool_2 (SV *cb)
2224	CODE:	2733	CODE:
2225	{	2734	{
2226	struct coro *coro = SvSTATE (coro_current);	2735	HV *hv = (HV *)SvRV (coro_current);
		2736	struct coro *coro = SvSTATE_hv ((SV *)hv);
2227		2737
2228	sv_setsv (cb, &PL_sv_undef);	2738	sv_setsv (cb, &PL_sv_undef);
2229		2739
2230	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2740	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2231	coro->saved_deffh = 0;	2741	coro->saved_deffh = 0;
…		…
2238	SvREFCNT_dec (old);	2748	SvREFCNT_dec (old);
2239	croak ("\3async_pool terminate\2\n");	2749	croak ("\3async_pool terminate\2\n");
2240	}	2750	}
2241		2751
2242	av_clear (GvAV (PL_defgv));	2752	av_clear (GvAV (PL_defgv));
2243	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2753	hv_store (hv, "desc", sizeof ("desc") - 1,
2244	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2754	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2245		2755
2246	coro->prio = 0;	2756	coro->prio = 0;
2247		2757
2248	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2758	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2249	api_trace (coro_current, 0);	2759	api_trace (aTHX_ coro_current, 0);
2250		2760
2251	av_push (av_async_pool, newSVsv (coro_current));	2761	av_push (av_async_pool, newSVsv (coro_current));
2252	}	2762	}
2253		2763
2254	#if 0
2255		2764
2256	void	2765	MODULE = Coro::State PACKAGE = PerlIO::cede
2257	_generator_call (...)	2766
2258	PROTOTYPE: @	2767	BOOT:
2259	PPCODE:	2768	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2260	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);	2769
2261	xxxx	2770
2262	abort ();	2771	MODULE = Coro::State PACKAGE = Coro::Semaphore
2263		2772
2264	SV *	2773	SV *
2265	gensub (SV *sub, ...)	2774	new (SV *klass, SV *count_ = 0)
2266	PROTOTYPE: &;@	2775	CODE:
2267	CODE:
2268	{	2776	{
2269	struct coro *coro;	2777	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2270	MAGIC *mg;	2778	AV *av = newAV ();
2271	CV *xcv;	2779	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2272	CV *ncv = (CV *)newSV_type (SVt_PVCV);	2780	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2273	int i;
2274
2275	CvGV (ncv) = CvGV (cv);
2276	CvFILE (ncv) = CvFILE (cv);
2277
2278	Newz (0, coro, 1, struct coro);
2279	coro->args = newAV ();
2280	coro->flags = CF_NEW;
2281
2282	av_extend (coro->args, items - 1);
2283	for (i = 1; i < items; i++)
2284	av_push (coro->args, newSVsv (ST (i)));
2285
2286	CvISXSUB_on (ncv);
2287	CvXSUBANY (ncv).any_ptr = (void *)coro;
2288
2289	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2290
2291	CvXSUB (ncv) = CvXSUB (xcv);
2292	CvANON_on (ncv);
2293
2294	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2295	RETVAL = newRV_noinc ((SV *)ncv);
2296	}	2781	}
2297	OUTPUT:	2782	OUTPUT:
2298	RETVAL	2783	RETVAL
2299		2784
2300	#endif	2785	SV *
2301		2786	count (SV *self)
2302		2787	CODE:
2303	MODULE = Coro::State PACKAGE = Coro::AIO	2788	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2789	OUTPUT:
		2790	RETVAL
2304		2791
2305	void	2792	void
2306	_get_state (SV *self)	2793	up (SV *self, int adjust = 1)
2307	PPCODE:	2794	ALIAS:
2308	{	2795	adjust = 1
2309	AV *defav = GvAV (PL_defgv);	2796	CODE:
2310	AV *av = newAV ();	2797	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2311	int i;
2312	SV *data_sv = newSV (sizeof (struct io_state));
2313	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2314	SvCUR_set (data_sv, sizeof (struct io_state));
2315	SvPOK_only (data_sv);
2316
2317	data->errorno = errno;
2318	data->laststype = PL_laststype;
2319	data->laststatval = PL_laststatval;
2320	data->statcache = PL_statcache;
2321
2322	av_extend (av, AvFILLp (defav) + 1 + 1);
2323
2324	for (i = 0; i <= AvFILLp (defav); ++i)
2325	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2326
2327	av_push (av, data_sv);
2328
2329	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2330
2331	api_ready (self);
2332	}
2333		2798
2334	void	2799	void
2335	_set_state (SV *state)	2800	down (SV *self)
2336	PROTOTYPE: $	2801	CODE:
2337	PPCODE:	2802	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2803
		2804	void
		2805	try (SV *self)
		2806	PPCODE:
2338	{	2807	{
2339	AV *av = (AV *)SvRV (state);	2808	AV *av = (AV *)SvRV (self);
2340	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);	2809	SV *count_sv = AvARRAY (av)[0];
		2810	IV count = SvIVX (count_sv);
		2811
		2812	if (count > 0)
		2813	{
		2814	--count;
		2815	SvIVX (count_sv) = count;
		2816	XSRETURN_YES;
		2817	}
		2818	else
		2819	XSRETURN_NO;
		2820	}
		2821
		2822	void
		2823	waiters (SV *self)
		2824	CODE:
		2825	{
		2826	AV *av = (AV *)SvRV (self);
		2827
		2828	if (GIMME_V == G_SCALAR)
		2829	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2830	else
		2831	{
2341	int i;	2832	int i;
2342
2343	errno = data->errorno;
2344	PL_laststype = data->laststype;
2345	PL_laststatval = data->laststatval;
2346	PL_statcache = data->statcache;
2347
2348	EXTEND (SP, AvFILLp (av));	2833	EXTEND (SP, AvFILLp (av) + 1 - 1);
2349	for (i = 0; i < AvFILLp (av); ++i)	2834	for (i = 1; i <= AvFILLp (av); ++i)
2350	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	2835	PUSHs (newSVsv (AvARRAY (av)[i]));
		2836	}
2351	}	2837	}
2352		2838
2353		2839
2354	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2840	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2355		2841
2356	BOOT:	2842	BOOT:
2357	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2843	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2358		2844
2359	SV *	2845	void
2360	_schedule (...)	2846	_schedule (...)
2361	PROTOTYPE: @
2362	CODE:	2847	CODE:
2363	{	2848	{
2364	static int incede;	2849	static int incede;
2365		2850
2366	api_cede_notself ();	2851	api_cede_notself (aTHX);
2367		2852
2368	++incede;	2853	++incede;
2369	while (coro_nready >= incede && api_cede ())	2854	while (coro_nready >= incede && api_cede (aTHX))
2370	;	2855	;
2371		2856
2372	sv_setsv (sv_activity, &PL_sv_undef);	2857	sv_setsv (sv_activity, &PL_sv_undef);
2373	if (coro_nready >= incede)	2858	if (coro_nready >= incede)
2374	{	2859	{
…		…
2380		2865
2381	--incede;	2866	--incede;
2382	}	2867	}
2383		2868
2384		2869
2385	MODULE = Coro::State PACKAGE = PerlIO::cede	2870	MODULE = Coro::State PACKAGE = Coro::AIO
2386		2871
2387	BOOT:	2872	void
2388	PerlIO_define_layer (aTHX_ &PerlIO_cede);	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	CV *slf_cv = newXSproto (target, coro_aio_req_xs, __FILE__, proto);
		2880	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		2881	}
		2882

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