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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.265 by root, Fri Nov 14 02:42:26 2008 UTC vs.
Revision 1.300 by root, Wed Nov 19 02:07:48 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
…		…
116	# define CORO_PREFER_PERL_FUNCTIONS 0	119	# define CORO_PREFER_PERL_FUNCTIONS 0
117	#endif	120	#endif
118		121
119	/* The next macros try to return the current stack pointer, in an as	122	/* The next macros try to return the current stack pointer, in an as
120	* portable way as possible. */	123	* portable way as possible. */
		124	#if __GNUC__ >= 4
		125	# define dSTACKLEVEL int stacklevel_dummy
		126	# define STACKLEVEL __builtin_frame_address (0)
		127	#else
121	#define dSTACKLEVEL volatile char stacklevel	128	# define dSTACKLEVEL volatile void *stacklevel
122	#define STACKLEVEL ((void *)&stacklevel)	129	# define STACKLEVEL ((void *)&stacklevel)
		130	#endif
123		131
124	#define IN_DESTRUCT (PL_main_cv == Nullcv)	132	#define IN_DESTRUCT (PL_main_cv == Nullcv)
125		133
126	#if __GNUC__ >= 3	134	#if __GNUC__ >= 3
127	# define attribute(x) __attribute__(x)	135	# define attribute(x) __attribute__(x)
…		…
137	#define expect_true(expr) expect ((expr) != 0, 1)	145	#define expect_true(expr) expect ((expr) != 0, 1)
138		146
139	#define NOINLINE attribute ((noinline))	147	#define NOINLINE attribute ((noinline))
140		148
141	#include "CoroAPI.h"	149	#include "CoroAPI.h"
		150	#define GCoroAPI (&coroapi) /* very sneaky */
142		151
143	#ifdef USE_ITHREADS	152	#ifdef USE_ITHREADS
144
145	static perl_mutex coro_lock;
146	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148	# if CORO_PTHREAD	153	# if CORO_PTHREAD
149	static void *coro_thx;	154	static void *coro_thx;
150	# endif	155	# endif
151
152	#else
153
154	# define LOCK (void)0
155	# define UNLOCK (void)0
156
157	#endif	156	#endif
158
159	# undef LOCK
160	# define LOCK (void)0
161	# undef UNLOCK
162	# define UNLOCK (void)0
163
164	/* helper storage struct for Coro::AIO */
165	struct io_state
166	{
167	AV *res;
168	int errorno;
169	I32 laststype; /* U16 in 5.10.0 */
170	int laststatval;
171	Stat_t statcache;
172	};
173		157
174	static double (*nvtime)(); /* so why doesn't it take void? */	158	static double (*nvtime)(); /* so why doesn't it take void? */
		159
		160	/* we hijack an hopefully unused CV flag for our purposes */
		161	#define CVf_SLF 0x4000
		162	static OP *pp_slf (pTHX);
175		163
176	static U32 cctx_gen;	164	static U32 cctx_gen;
177	static size_t cctx_stacksize = CORO_STACKSIZE;	165	static size_t cctx_stacksize = CORO_STACKSIZE;
178	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
179	static AV *main_mainstack; /* used to differentiate between $main and others */	167	static AV *main_mainstack; /* used to differentiate between $main and others */
180	static JMPENV *main_top_env;	168	static JMPENV *main_top_env;
181	static HV *coro_state_stash, *coro_stash;	169	static HV *coro_state_stash, *coro_stash;
182	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */	170	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183	static volatile struct coro *transfer_next;
184
185	struct transfer_args
186	{
187	struct coro *prev, *next;
188	};
189		171
190	static GV *irsgv; /* $/ */	172	static GV *irsgv; /* $/ */
191	static GV *stdoutgv; /* *STDOUT */	173	static GV *stdoutgv; /* *STDOUT */
192	static SV *rv_diehook;	174	static SV *rv_diehook;
193	static SV *rv_warnhook;	175	static SV *rv_warnhook;
…		…
212	CC_TRACE_LINE = 0x10, /* trace each statement */	194	CC_TRACE_LINE = 0x10, /* trace each statement */
213	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	195	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214	};	196	};
215		197
216	/* this is a structure representing a c-level coroutine */	198	/* this is a structure representing a c-level coroutine */
217	typedef struct coro_cctx {	199	typedef struct coro_cctx
		200	{
218	struct coro_cctx *next;	201	struct coro_cctx *next;
219		202
220	/* the stack */	203	/* the stack */
221	void *sptr;	204	void *sptr;
222	size_t ssize;	205	size_t ssize;
…		…
240	CF_NEW = 0x0004, /* has never been switched to */	223	CF_NEW = 0x0004, /* has never been switched to */
241	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	224	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242	};	225	};
243		226
244	/* the structure where most of the perl state is stored, overlaid on the cxstack */	227	/* the structure where most of the perl state is stored, overlaid on the cxstack */
245	typedef struct {	228	typedef struct
		229	{
246	SV *defsv;	230	SV *defsv;
247	AV *defav;	231	AV *defav;
248	SV *errsv;	232	SV *errsv;
249	SV *irsgv;	233	SV *irsgv;
250	#define VAR(name,type) type name;	234	#define VAR(name,type) type name;
…		…
254		238
255	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	239	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256		240
257	/* this is a structure representing a perl-level coroutine */	241	/* this is a structure representing a perl-level coroutine */
258	struct coro {	242	struct coro {
259	/* the c coroutine allocated to this perl coroutine, if any */	243	/* the C coroutine allocated to this perl coroutine, if any */
260	coro_cctx *cctx;	244	coro_cctx *cctx;
261		245
262	/* process data */	246	/* state data */
		247	struct CoroSLF slf_frame; /* saved slf frame */
263	AV *mainstack;	248	AV *mainstack;
264	perl_slots *slot; /* basically the saved sp */	249	perl_slots *slot; /* basically the saved sp */
265		250
266	AV *args; /* data associated with this coroutine (initial args) */	251	AV *args; /* data associated with this coroutine (initial args) */
267	int refcnt; /* coroutines are refcounted, yes */	252	int refcnt; /* coroutines are refcounted, yes */
268	int flags; /* CF_ flags */	253	int flags; /* CF_ flags */
269	HV *hv; /* the perl hash associated with this coro, if any */	254	HV *hv; /* the perl hash associated with this coro, if any */
		255	void (*on_destroy)(pTHX_ struct coro *coro);
270		256
271	/* statistics */	257	/* statistics */
272	int usecount; /* number of transfers to this coro */	258	int usecount; /* number of transfers to this coro */
273		259
274	/* coro process data */	260	/* coro process data */
275	int prio;	261	int prio;
276	SV *throw; /* exception to be thrown */	262	SV *except; /* exception to be thrown */
277		263
278	/* async_pool */	264	/* async_pool */
279	SV *saved_deffh;	265	SV *saved_deffh;
280		266
281	/* linked list */	267	/* linked list */
282	struct coro *next, *prev;	268	struct coro *next, *prev;
283	};	269	};
284		270
285	typedef struct coro *Coro__State;	271	typedef struct coro *Coro__State;
286	typedef struct coro *Coro__State_or_hashref;	272	typedef struct coro *Coro__State_or_hashref;
		273
		274	/* the following variables are effectively part of the perl context */
		275	/* and get copied between struct coro and these variables */
		276	/* the mainr easonw e don't support windows process emulation */
		277	static struct CoroSLF slf_frame; /* the current slf frame */
287		278
288	/** Coro ********************************************************************/	279	/** Coro ********************************************************************/
289		280
290	#define PRIO_MAX 3	281	#define PRIO_MAX 3
291	#define PRIO_HIGH 1	282	#define PRIO_HIGH 1
…		…
296		287
297	/* for Coro.pm */	288	/* for Coro.pm */
298	static SV *coro_current;	289	static SV *coro_current;
299	static SV *coro_readyhook;	290	static SV *coro_readyhook;
300	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	291	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301	static int coro_nready;
302	static struct coro *coro_first;	292	static struct coro *coro_first;
		293	#define coro_nready coroapi.nready
303		294
304	/** lowlevel stuff **********************************************************/	295	/** lowlevel stuff **********************************************************/
305		296
306	static SV *	297	static SV *
307	coro_get_sv (pTHX_ const char *name, int create)	298	coro_get_sv (pTHX_ const char *name, int create)
…		…
392	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	383	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
393		384
394	return 0;	385	return 0;
395	}	386	}
396		387
397	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	388	#define CORO_MAGIC_type_cv 26
398	#define CORO_MAGIC_type_state PERL_MAGIC_ext	389	#define CORO_MAGIC_type_state PERL_MAGIC_ext
399		390
400	static MGVTBL coro_cv_vtbl = {	391	static MGVTBL coro_cv_vtbl = {
401	0, 0, 0, 0,	392	0, 0, 0, 0,
402	coro_cv_free	393	coro_cv_free
403	};	394	};
404		395
		396	#define CORO_MAGIC_NN(sv, type) \
		397	(expect_true (SvMAGIC (sv)->mg_type == type) \
		398	? SvMAGIC (sv) \
		399	: mg_find (sv, type))
		400
405	#define CORO_MAGIC(sv, type) \	401	#define CORO_MAGIC(sv, type) \
406	SvMAGIC (sv) \	402	(expect_true (SvMAGIC (sv)) \
407	? SvMAGIC (sv)->mg_type == type \	403	? CORO_MAGIC_NN (sv, type) \
408	? SvMAGIC (sv) \
409	: mg_find (sv, type) \
410	: 0	404	: 0)
411		405
412	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	406	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	407	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
414		408
415	INLINE struct coro *	409	INLINE struct coro *
416	SvSTATE_ (pTHX_ SV *coro)	410	SvSTATE_ (pTHX_ SV *coro)
417	{	411	{
418	HV *stash;	412	HV *stash;
…		…
435	mg = CORO_MAGIC_state (coro);	429	mg = CORO_MAGIC_state (coro);
436	return (struct coro *)mg->mg_ptr;	430	return (struct coro *)mg->mg_ptr;
437	}	431	}
438		432
439	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	433	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		434
		435	/* faster than SvSTATE, but expects a coroutine hv */
		436	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		437	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
440		438
441	/* the next two functions merely cache the padlists */	439	/* the next two functions merely cache the padlists */
442	static void	440	static void
443	get_padlist (pTHX_ CV *cv)	441	get_padlist (pTHX_ CV *cv)
444	{	442	{
…		…
511	CvPADLIST (cv) = (AV *)POPs;	509	CvPADLIST (cv) = (AV *)POPs;
512	}	510	}
513		511
514	PUTBACK;	512	PUTBACK;
515	}	513	}
		514
		515	slf_frame = c->slf_frame;
		516	CORO_THROW = c->except;
516	}	517	}
517		518
518	static void	519	static void
519	save_perl (pTHX_ Coro__State c)	520	save_perl (pTHX_ Coro__State c)
520	{	521	{
		522	c->except = CORO_THROW;
		523	c->slf_frame = slf_frame;
		524
521	{	525	{
522	dSP;	526	dSP;
523	I32 cxix = cxstack_ix;	527	I32 cxix = cxstack_ix;
524	PERL_CONTEXT *ccstk = cxstack;	528	PERL_CONTEXT *ccstk = cxstack;
525	PERL_SI *top_si = PL_curstackinfo;	529	PERL_SI *top_si = PL_curstackinfo;
…		…
592	#undef VAR	596	#undef VAR
593	}	597	}
594	}	598	}
595		599
596	/*	600	/*
597	* allocate various perl stacks. This is an exact copy	601	* allocate various perl stacks. This is almost an exact copy
598	* of perl.c:init_stacks, except that it uses less memory	602	* of perl.c:init_stacks, except that it uses less memory
599	* on the (sometimes correct) assumption that coroutines do	603	* on the (sometimes correct) assumption that coroutines do
600	* not usually need a lot of stackspace.	604	* not usually need a lot of stackspace.
601	*/	605	*/
602	#if CORO_PREFER_PERL_FUNCTIONS	606	#if CORO_PREFER_PERL_FUNCTIONS
…		…
709	#endif	713	#endif
710	}	714	}
711	}	715	}
712		716
713	return rss;	717	return rss;
714	}
715
716	/** set stacklevel support **************************************************/
717
718	/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719	#define SSL_HEAD (void)0
720	/* we somtimes need to create the effect of leaving via pp_set_stacklevel */
721	#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723	INLINE void
724	set_stacklevel_tail (pTHX)
725	{
726	dSP;
727	int gimme = GIMME_V;
728
729	if (gimme == G_SCALAR)
730	XPUSHs (&PL_sv_undef);
731
732	PUTBACK;
733	}	718	}
734		719
735	/** coroutine stack handling ************************************************/	720	/** coroutine stack handling ************************************************/
736		721
737	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);	722	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
…		…
823		808
824	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	809	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
825	}	810	}
826		811
827	static void	812	static void
		813	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		814	{
		815	/* kind of mega-hacky, but works */
		816	ta->next = ta->prev = (struct coro *)ta;
		817	}
		818
		819	static int
		820	slf_check_nop (pTHX_ struct CoroSLF *frame)
		821	{
		822	return 0;
		823	}
		824
		825	static UNOP coro_setup_op;
		826
		827	static void NOINLINE /* noinline to keep it out of the transfer fast path */
828	coro_setup (pTHX_ struct coro *coro)	828	coro_setup (pTHX_ struct coro *coro)
829	{	829	{
830	/*	830	/*
831	* emulate part of the perl startup here.	831	* emulate part of the perl startup here.
832	*/	832	*/
…		…
859	{	859	{
860	dSP;	860	dSP;
861	UNOP myop;	861	UNOP myop;
862		862
863	Zero (&myop, 1, UNOP);	863	Zero (&myop, 1, UNOP);
864	myop.op_next = Nullop;	864	myop.op_next = Nullop;
865	myop.op_flags = OPf_WANT_VOID;	865	myop.op_flags = OPf_WANT_VOID;
866		866
867	PUSHMARK (SP);	867	PUSHMARK (SP);
868	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	868	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869	PUTBACK;	869	PUTBACK;
…		…
871	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	871	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872	SPAGAIN;	872	SPAGAIN;
873	}	873	}
874		874
875	/* this newly created coroutine might be run on an existing cctx which most	875	/* this newly created coroutine might be run on an existing cctx which most
876	* likely was suspended in set_stacklevel, called from pp_set_stacklevel,	876	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877	* so we have to emulate entering pp_set_stacklevel here.
878	*/	877	*/
879	SSL_HEAD;	878	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		879	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		880
		881	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		882	coro_setup_op.op_next = PL_op;
		883	coro_setup_op.op_type = OP_CUSTOM;
		884	coro_setup_op.op_ppaddr = pp_slf;
		885	/* no flags required, as an init function won't be called */
		886
		887	PL_op = (OP *)&coro_setup_op;
		888
		889	/* copy throw, in case it was set before coro_setup */
		890	CORO_THROW = coro->except;
880	}	891	}
881		892
882	static void	893	static void
883	coro_destruct (pTHX_ struct coro *coro)	894	coro_destruct (pTHX_ struct coro *coro)
884	{	895	{
…		…
908		919
909	SvREFCNT_dec (PL_diehook);	920	SvREFCNT_dec (PL_diehook);
910	SvREFCNT_dec (PL_warnhook);	921	SvREFCNT_dec (PL_warnhook);
911		922
912	SvREFCNT_dec (coro->saved_deffh);	923	SvREFCNT_dec (coro->saved_deffh);
913	SvREFCNT_dec (coro->throw);	924	SvREFCNT_dec (CORO_THROW);
914		925
915	coro_destruct_stacks (aTHX);	926	coro_destruct_stacks (aTHX);
916	}	927	}
917		928
918	INLINE void	929	INLINE void
…		…
928	static int	939	static int
929	runops_trace (pTHX)	940	runops_trace (pTHX)
930	{	941	{
931	COP *oldcop = 0;	942	COP *oldcop = 0;
932	int oldcxix = -2;	943	int oldcxix = -2;
933	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	944	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
934	coro_cctx *cctx = coro->cctx;	945	coro_cctx *cctx = coro->cctx;
935		946
936	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	947	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937	{	948	{
938	PERL_ASYNC_CHECK ();	949	PERL_ASYNC_CHECK ();
…		…
1047		1058
1048	TAINT_NOT;	1059	TAINT_NOT;
1049	return 0;	1060	return 0;
1050	}	1061	}
1051		1062
		1063	static struct coro_cctx *cctx_ssl_cctx;
		1064	static struct CoroSLF cctx_ssl_frame;
		1065
1052	static void	1066	static void
1053	prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)	1067	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1054	{	1068	{
1055	ta->prev = (struct coro *)cctx;	1069	ta->prev = (struct coro *)cctx_ssl_cctx;
1056	ta->next = 0;	1070	ta->next = 0;
1057	}	1071	}
1058		1072
1059	/* inject a fake call to Coro::State::_cctx_init into the execution */	1073	static int
1060	/* _cctx_init should be careful, as it could be called at almost any time */	1074	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1061	/* during execution of a perl program */	1075	{
1062	/* also initialises PL_top_env */	1076	*frame = cctx_ssl_frame;
		1077
		1078	return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
		1079	}
		1080
		1081	/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1063	static void NOINLINE	1082	static void NOINLINE
1064	cctx_prepare (pTHX_ coro_cctx *cctx)	1083	cctx_prepare (pTHX_ coro_cctx *cctx)
1065	{	1084	{
1066	dSP;
1067	UNOP myop;
1068
1069	PL_top_env = &PL_start_env;	1085	PL_top_env = &PL_start_env;
1070		1086
1071	if (cctx->flags & CC_TRACE)	1087	if (cctx->flags & CC_TRACE)
1072	PL_runops = runops_trace;	1088	PL_runops = runops_trace;
1073		1089
1074	Zero (&myop, 1, UNOP);	1090	/* we already must be executing an SLF op, there is no other valid way
1075	myop.op_next = PL_op;	1091	* that can lead to creation of a new cctx */
1076	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1092	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1093	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1077		1094
1078	PUSHMARK (SP);	1095	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1079	EXTEND (SP, 2);	1096	cctx_ssl_cctx = cctx;
1080	PUSHs (sv_2mortal (newSViv ((IV)cctx)));	1097	cctx_ssl_frame = slf_frame;
1081	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1098
1082	PUTBACK;	1099	slf_frame.prepare = slf_prepare_set_stacklevel;
1083	PL_op = (OP *)&myop;	1100	slf_frame.check = slf_check_set_stacklevel;
1084	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1085	SPAGAIN;
1086	}	1101	}
1087		1102
1088	/* the tail of transfer: execute stuff we can only do after a transfer */	1103	/* the tail of transfer: execute stuff we can only do after a transfer */
1089	INLINE void	1104	INLINE void
1090	transfer_tail (pTHX)	1105	transfer_tail (pTHX)
1091	{	1106	{
1092	struct coro *next = (struct coro *)transfer_next;
1093	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
1096	free_coro_mortal (aTHX);	1107	free_coro_mortal (aTHX);
1097	UNLOCK;
1098
1099	if (expect_false (next->throw))
1100	{
1101	SV *exception = sv_2mortal (next->throw);
1102
1103	next->throw = 0;
1104	sv_setsv (ERRSV, exception);
1105	croak (0);
1106	}
1107	}	1108	}
1108		1109
1109	/*	1110	/*
1110	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1111	*/	1112	*/
…		…
1118	# endif	1119	# endif
1119	#endif	1120	#endif
1120	{	1121	{
1121	dTHX;	1122	dTHX;
1122		1123
1123	/* we are the alternative tail to pp_set_stacklevel */	1124	/* normally we would need to skip the entersub here */
1124	/* so do the same things here */	1125	/* not doing so will re-execute it, which is exactly what we want */
1125	SSL_TAIL;
1126
1127	/* we now skip the op that did lead to transfer() */
1128	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
1129		1127
1130	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1131	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1132		1130
1133	/* cctx_run is the alternative tail of transfer() */	1131	/* cctx_run is the alternative tail of transfer() */
…		…
1294	/** coroutine switching *****************************************************/	1292	/** coroutine switching *****************************************************/
1295		1293
1296	static void	1294	static void
1297	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1295	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298	{	1296	{
		1297	/* TODO: throwing up here is considered harmful */
		1298
1299	if (expect_true (prev != next))	1299	if (expect_true (prev != next))
1300	{	1300	{
1301	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1301	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1302	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303		1303
1304	if (expect_false (next->flags & CF_RUNNING))	1304	if (expect_false (next->flags & CF_RUNNING))
1305	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1305	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306		1306
1307	if (expect_false (next->flags & CF_DESTROYED))	1307	if (expect_false (next->flags & CF_DESTROYED))
1308	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1308	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309		1309
1310	#if !PERL_VERSION_ATLEAST (5,10,0)	1310	#if !PERL_VERSION_ATLEAST (5,10,0)
1311	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1311	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1312	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313	#endif	1313	#endif
1314	}	1314	}
1315	}	1315	}
1316		1316
1317	/* always use the TRANSFER macro */	1317	/* always use the TRANSFER macro */
1318	static void NOINLINE	1318	static void NOINLINE /* noinline so we have a fixed stackframe */
1319	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1319	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1320	{	1320	{
1321	dSTACKLEVEL;	1321	dSTACKLEVEL;
1322		1322
1323	/* sometimes transfer is only called to set idle_sp */	1323	/* sometimes transfer is only called to set idle_sp */
…		…
1338	prev->flags |= CF_RUNNING;	1338	prev->flags |= CF_RUNNING;
1339	}	1339	}
1340		1340
1341	prev->flags &= ~CF_RUNNING;	1341	prev->flags &= ~CF_RUNNING;
1342	next->flags |= CF_RUNNING;	1342	next->flags |= CF_RUNNING;
1343
1344	LOCK;
1345		1343
1346	/* first get rid of the old state */	1344	/* first get rid of the old state */
1347	save_perl (aTHX_ prev);	1345	save_perl (aTHX_ prev);
1348		1346
1349	if (expect_false (next->flags & CF_NEW))	1347	if (expect_false (next->flags & CF_NEW))
…		…
1363	prev__cctx->idle_sp == STACKLEVEL	1361	prev__cctx->idle_sp == STACKLEVEL
1364	&& !(prev__cctx->flags & CC_TRACE)	1362	&& !(prev__cctx->flags & CC_TRACE)
1365	&& !force_cctx	1363	&& !force_cctx
1366	))	1364	))
1367	{	1365	{
1368	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1366	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1369	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));	1367	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1370		1368
1371	prev->cctx = 0;	1369	prev->cctx = 0;
1372		1370
1373	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1371	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
…		…
1381		1379
1382	++next->usecount;	1380	++next->usecount;
1383		1381
1384	if (expect_true (!next->cctx))	1382	if (expect_true (!next->cctx))
1385	next->cctx = cctx_get (aTHX);	1383	next->cctx = cctx_get (aTHX);
1386
1387	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1388	transfer_next = next;
1389		1384
1390	if (expect_false (prev__cctx != next->cctx))	1385	if (expect_false (prev__cctx != next->cctx))
1391	{	1386	{
1392	prev__cctx->top_env = PL_top_env;	1387	prev__cctx->top_env = PL_top_env;
1393	PL_top_env = next->cctx->top_env;	1388	PL_top_env = next->cctx->top_env;
…		…
1407	coro_state_destroy (pTHX_ struct coro *coro)	1402	coro_state_destroy (pTHX_ struct coro *coro)
1408	{	1403	{
1409	if (coro->flags & CF_DESTROYED)	1404	if (coro->flags & CF_DESTROYED)
1410	return 0;	1405	return 0;
1411		1406
		1407	if (coro->on_destroy)
		1408	coro->on_destroy (aTHX_ coro);
		1409
1412	coro->flags |= CF_DESTROYED;	1410	coro->flags |= CF_DESTROYED;
1413		1411
1414	if (coro->flags & CF_READY)	1412	if (coro->flags & CF_READY)
1415	{	1413	{
1416	/* reduce nready, as destroying a ready coro effectively unreadies it */	1414	/* reduce nready, as destroying a ready coro effectively unreadies it */
1417	/* alternative: look through all ready queues and remove the coro */	1415	/* alternative: look through all ready queues and remove the coro */
1418	LOCK;
1419	--coro_nready;	1416	--coro_nready;
1420	UNLOCK;
1421	}	1417	}
1422	else	1418	else
1423	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1419	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1424		1420
1425	if (coro->mainstack && coro->mainstack != main_mainstack)	1421	if (coro->mainstack && coro->mainstack != main_mainstack)
1426	{	1422	{
1427	struct coro temp;	1423	struct coro temp;
1428		1424
1429	if (coro->flags & CF_RUNNING)	1425	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1430	croak ("FATAL: tried to destroy currently running coroutine");
1431		1426
1432	save_perl (aTHX_ &temp);	1427	save_perl (aTHX_ &temp);
1433	load_perl (aTHX_ coro);	1428	load_perl (aTHX_ coro);
1434		1429
1435	coro_destruct (aTHX_ coro);	1430	coro_destruct (aTHX_ coro);
…		…
1486	# define MGf_DUP 0	1481	# define MGf_DUP 0
1487	#endif	1482	#endif
1488	};	1483	};
1489		1484
1490	static void	1485	static void
1491	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1486	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1492	{	1487	{
1493	ta->prev = SvSTATE (prev_sv);	1488	ta->prev = SvSTATE (prev_sv);
1494	ta->next = SvSTATE (next_sv);	1489	ta->next = SvSTATE (next_sv);
1495	TRANSFER_CHECK (*ta);	1490	TRANSFER_CHECK (*ta);
1496	}	1491	}
1497		1492
1498	static void	1493	static void
1499	api_transfer (SV *prev_sv, SV *next_sv)	1494	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1500	{	1495	{
1501	dTHX;
1502	struct transfer_args ta;	1496	struct coro_transfer_args ta;
1503		1497
1504	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1498	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1505	TRANSFER (ta, 1);	1499	TRANSFER (ta, 1);
1506	}	1500	}
1507		1501
1508	/** Coro ********************************************************************/	1502	/** Coro ********************************************************************/
1509		1503
1510	static void	1504	INLINE void
1511	coro_enq (pTHX_ SV *coro_sv)	1505	coro_enq (pTHX_ struct coro *coro)
1512	{	1506	{
1513	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1507	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1514	}	1508	}
1515		1509
1516	static SV *	1510	INLINE SV *
1517	coro_deq (pTHX)	1511	coro_deq (pTHX)
1518	{	1512	{
1519	int prio;	1513	int prio;
1520		1514
1521	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1515	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1524		1518
1525	return 0;	1519	return 0;
1526	}	1520	}
1527		1521
1528	static int	1522	static int
1529	api_ready (SV *coro_sv)	1523	api_ready (pTHX_ SV *coro_sv)
1530	{	1524	{
1531	dTHX;
1532	struct coro *coro;	1525	struct coro *coro;
1533	SV *sv_hook;	1526	SV *sv_hook;
1534	void (*xs_hook)(void);	1527	void (*xs_hook)(void);
1535		1528
1536	if (SvROK (coro_sv))	1529	if (SvROK (coro_sv))
…		…
1541	if (coro->flags & CF_READY)	1534	if (coro->flags & CF_READY)
1542	return 0;	1535	return 0;
1543		1536
1544	coro->flags |= CF_READY;	1537	coro->flags |= CF_READY;
1545		1538
1546	LOCK;
1547
1548	sv_hook = coro_nready ? 0 : coro_readyhook;	1539	sv_hook = coro_nready ? 0 : coro_readyhook;
1549	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1540	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1550		1541
1551	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1542	coro_enq (aTHX_ coro);
1552	++coro_nready;	1543	++coro_nready;
1553		1544
1554	UNLOCK;
1555
1556	if (sv_hook)	1545	if (sv_hook)
1557	{	1546	{
1558	dSP;	1547	dSP;
1559		1548
1560	ENTER;	1549	ENTER;
1561	SAVETMPS;	1550	SAVETMPS;
1562		1551
1563	PUSHMARK (SP);	1552	PUSHMARK (SP);
1564	PUTBACK;	1553	PUTBACK;
1565	call_sv (sv_hook, G_DISCARD);	1554	call_sv (sv_hook, G_VOID | G_DISCARD);
1566	SPAGAIN;
1567		1555
1568	FREETMPS;	1556	FREETMPS;
1569	LEAVE;	1557	LEAVE;
1570	}	1558	}
1571		1559
…		…
1574		1562
1575	return 1;	1563	return 1;
1576	}	1564	}
1577		1565
1578	static int	1566	static int
1579	api_is_ready (SV *coro_sv)	1567	api_is_ready (pTHX_ SV *coro_sv)
1580	{	1568	{
1581	dTHX;
1582
1583	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1569	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1584	}	1570	}
1585		1571
1586	INLINE void	1572	INLINE void
1587	prepare_schedule (pTHX_ struct transfer_args *ta)	1573	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1588	{	1574	{
1589	SV *prev_sv, *next_sv;	1575	SV *prev_sv, *next_sv;
1590		1576
1591	for (;;)	1577	for (;;)
1592	{	1578	{
1593	LOCK;
1594	next_sv = coro_deq (aTHX);	1579	next_sv = coro_deq (aTHX);
1595		1580
1596	/* nothing to schedule: call the idle handler */	1581	/* nothing to schedule: call the idle handler */
1597	if (expect_false (!next_sv))	1582	if (expect_false (!next_sv))
1598	{	1583	{
1599	dSP;	1584	dSP;
1600	UNLOCK;
1601		1585
1602	ENTER;	1586	ENTER;
1603	SAVETMPS;	1587	SAVETMPS;
1604		1588
1605	PUSHMARK (SP);	1589	PUSHMARK (SP);
1606	PUTBACK;	1590	PUTBACK;
1607	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1591	call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1608	SPAGAIN;
1609		1592
1610	FREETMPS;	1593	FREETMPS;
1611	LEAVE;	1594	LEAVE;
1612	continue;	1595	continue;
1613	}	1596	}
1614		1597
1615	ta->next = SvSTATE (next_sv);	1598	ta->next = SvSTATE_hv (next_sv);
1616		1599
1617	/* cannot transfer to destroyed coros, skip and look for next */	1600	/* cannot transfer to destroyed coros, skip and look for next */
1618	if (expect_false (ta->next->flags & CF_DESTROYED))	1601	if (expect_false (ta->next->flags & CF_DESTROYED))
1619	{	1602	{
1620	UNLOCK;
1621	SvREFCNT_dec (next_sv);	1603	SvREFCNT_dec (next_sv);
1622	/* coro_nready has already been taken care of by destroy */	1604	/* coro_nready has already been taken care of by destroy */
1623	continue;	1605	continue;
1624	}	1606	}
1625		1607
1626	--coro_nready;	1608	--coro_nready;
1627	UNLOCK;
1628	break;	1609	break;
1629	}	1610	}
1630		1611
1631	/* free this only after the transfer */	1612	/* free this only after the transfer */
1632	prev_sv = SvRV (coro_current);	1613	prev_sv = SvRV (coro_current);
1633	ta->prev = SvSTATE (prev_sv);	1614	ta->prev = SvSTATE_hv (prev_sv);
1634	TRANSFER_CHECK (*ta);	1615	TRANSFER_CHECK (*ta);
1635	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1616	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1636	ta->next->flags &= ~CF_READY;	1617	ta->next->flags &= ~CF_READY;
1637	SvRV_set (coro_current, next_sv);	1618	SvRV_set (coro_current, next_sv);
1638		1619
1639	LOCK;
1640	free_coro_mortal (aTHX);	1620	free_coro_mortal (aTHX);
1641	coro_mortal = prev_sv;	1621	coro_mortal = prev_sv;
1642	UNLOCK;
1643	}	1622	}
1644		1623
1645	INLINE void	1624	INLINE void
1646	prepare_cede (pTHX_ struct transfer_args *ta)	1625	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1647	{	1626	{
1648	api_ready (coro_current);	1627	api_ready (aTHX_ coro_current);
1649	prepare_schedule (aTHX_ ta);	1628	prepare_schedule (aTHX_ ta);
1650	}	1629	}
1651		1630
		1631	INLINE void
		1632	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1633	{
		1634	SV *prev = SvRV (coro_current);
		1635
		1636	if (coro_nready)
		1637	{
		1638	prepare_schedule (aTHX_ ta);
		1639	api_ready (aTHX_ prev);
		1640	}
		1641	else
		1642	prepare_nop (aTHX_ ta);
		1643	}
		1644
		1645	static void
		1646	api_schedule (pTHX)
		1647	{
		1648	struct coro_transfer_args ta;
		1649
		1650	prepare_schedule (aTHX_ &ta);
		1651	TRANSFER (ta, 1);
		1652	}
		1653
1652	static int	1654	static int
1653	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1655	api_cede (pTHX)
1654	{	1656	{
1655	if (coro_nready)	1657	struct coro_transfer_args ta;
1656	{	1658
1657	SV *prev = SvRV (coro_current);
1658	prepare_schedule (aTHX_ ta);	1659	prepare_cede (aTHX_ &ta);
1659	api_ready (prev);	1660
		1661	if (expect_true (ta.prev != ta.next))
		1662	{
		1663	TRANSFER (ta, 1);
1660	return 1;	1664	return 1;
1661	}	1665	}
1662	else	1666	else
1663	return 0;	1667	return 0;
1664	}	1668	}
1665		1669
1666	static void
1667	api_schedule (void)
1668	{
1669	dTHX;
1670	struct transfer_args ta;
1671
1672	prepare_schedule (aTHX_ &ta);
1673	TRANSFER (ta, 1);
1674	}
1675
1676	static int	1670	static int
1677	api_cede (void)	1671	api_cede_notself (pTHX)
1678	{	1672	{
1679	dTHX;	1673	if (coro_nready)
		1674	{
1680	struct transfer_args ta;	1675	struct coro_transfer_args ta;
1681		1676
1682	prepare_cede (aTHX_ &ta);	1677	prepare_cede_notself (aTHX_ &ta);
1683
1684	if (expect_true (ta.prev != ta.next))
1685	{
1686	TRANSFER (ta, 1);	1678	TRANSFER (ta, 1);
1687	return 1;	1679	return 1;
1688	}	1680	}
1689	else	1681	else
1690	return 0;	1682	return 0;
1691	}	1683	}
1692		1684
1693	static int	1685	static void
1694	api_cede_notself (void)
1695	{
1696	dTHX;
1697	struct transfer_args ta;
1698
1699	if (prepare_cede_notself (aTHX_ &ta))
1700	{
1701	TRANSFER (ta, 1);
1702	return 1;
1703	}
1704	else
1705	return 0;
1706	}
1707
1708	static void
1709	api_trace (SV *coro_sv, int flags)	1686	api_trace (pTHX_ SV *coro_sv, int flags)
1710	{	1687	{
1711	dTHX;
1712	struct coro *coro = SvSTATE (coro_sv);	1688	struct coro *coro = SvSTATE (coro_sv);
1713		1689
1714	if (flags & CC_TRACE)	1690	if (flags & CC_TRACE)
1715	{	1691	{
1716	if (!coro->cctx)	1692	if (!coro->cctx)
1717	coro->cctx = cctx_new_run ();	1693	coro->cctx = cctx_new_run ();
1718	else if (!(coro->cctx->flags & CC_TRACE))	1694	else if (!(coro->cctx->flags & CC_TRACE))
1719	croak ("cannot enable tracing on coroutine with custom stack");	1695	croak ("cannot enable tracing on coroutine with custom stack,");
1720		1696
1721	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1697	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1722	}	1698	}
1723	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1699	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1724	{	1700	{
…		…
1729	else	1705	else
1730	coro->slot->runops = RUNOPS_DEFAULT;	1706	coro->slot->runops = RUNOPS_DEFAULT;
1731	}	1707	}
1732	}	1708	}
1733		1709
1734	#if 0	1710	/*****************************************************************************/
		1711	/* schedule-like-function opcode (SLF) */
		1712
		1713	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1714	static const CV *slf_cv;
		1715	static SV **slf_argv;
		1716	static int slf_argc, slf_arga; /* count, allocated */
		1717	static I32 slf_ax; /* top of stack, for restore */
		1718
		1719	/* this restores the stack in the case we patched the entersub, to */
		1720	/* recreate the stack frame as perl will on following calls */
		1721	/* since entersub cleared the stack */
		1722	static OP *
		1723	pp_restore (pTHX)
		1724	{
		1725	int i;
		1726	SV **SP = PL_stack_base + slf_ax;
		1727
		1728	PUSHMARK (SP);
		1729
		1730	EXTEND (SP, slf_argc + 1);
		1731
		1732	for (i = 0; i < slf_argc; ++i)
		1733	PUSHs (sv_2mortal (slf_argv [i]));
		1734
		1735	PUSHs ((SV *)CvGV (slf_cv));
		1736
		1737	RETURNOP (slf_restore.op_first);
		1738	}
		1739
1735	static int	1740	static void
1736	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1741	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1737	{	1742	{
1738	AV *padlist;	1743	SV **arg = (SV **)slf_frame.data;
1739	AV *av = (AV *)mg->mg_obj;
1740		1744
1741	abort ();	1745	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1742
1743	return 0;
1744	}	1746	}
1745		1747
1746	static MGVTBL coro_gensub_vtbl = {	1748	static void
1747	0, 0, 0, 0,	1749	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1748	coro_gensub_free	1750	{
1749	};	1751	if (items != 2)
1750	#endif	1752	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1753
		1754	frame->prepare = slf_prepare_transfer;
		1755	frame->check = slf_check_nop;
		1756	frame->data = (void *)arg; /* let's hope it will stay valid */
		1757	}
		1758
		1759	static void
		1760	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1761	{
		1762	frame->prepare = prepare_schedule;
		1763	frame->check = slf_check_nop;
		1764	}
		1765
		1766	static void
		1767	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1768	{
		1769	frame->prepare = prepare_cede;
		1770	frame->check = slf_check_nop;
		1771	}
		1772
		1773	static void
		1774	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1775	{
		1776	frame->prepare = prepare_cede_notself;
		1777	frame->check = slf_check_nop;
		1778	}
		1779
		1780	/*
		1781	* these not obviously related functions are all rolled into one
		1782	* function to increase chances that they all will call transfer with the same
		1783	* stack offset
		1784	* SLF stands for "schedule-like-function".
		1785	*/
		1786	static OP *
		1787	pp_slf (pTHX)
		1788	{
		1789	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1790
		1791	/* set up the slf frame, unless it has already been set-up */
		1792	/* the latter happens when a new coro has been started */
		1793	/* or when a new cctx was attached to an existing coroutine */
		1794	if (expect_true (!slf_frame.prepare))
		1795	{
		1796	/* first iteration */
		1797	dSP;
		1798	SV **arg = PL_stack_base + TOPMARK + 1;
		1799	int items = SP - arg; /* args without function object */
		1800	SV *gv = *sp;
		1801
		1802	/* do a quick consistency check on the "function" object, and if it isn't */
		1803	/* for us, divert to the real entersub */
		1804	if (SvTYPE (gv) != SVt_PVGV
		1805	|| !GvCV (gv)
		1806	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1807	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1808
		1809	if (!(PL_op->op_flags & OPf_STACKED))
		1810	{
		1811	/* ampersand-form of call, use @_ instead of stack */
		1812	AV *av = GvAV (PL_defgv);
		1813	arg = AvARRAY (av);
		1814	items = AvFILLp (av) + 1;
		1815	}
		1816
		1817	/* now call the init function, which needs to set up slf_frame */
		1818	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1819	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1820
		1821	/* pop args */
		1822	SP = PL_stack_base + POPMARK;
		1823
		1824	PUTBACK;
		1825	}
		1826
		1827	/* now that we have a slf_frame, interpret it! */
		1828	/* we use a callback system not to make the code needlessly */
		1829	/* complicated, but so we can run multiple perl coros from one cctx */
		1830
		1831	do
		1832	{
		1833	struct coro_transfer_args ta;
		1834
		1835	slf_frame.prepare (aTHX_ &ta);
		1836	TRANSFER (ta, 0);
		1837
		1838	checkmark = PL_stack_sp - PL_stack_base;
		1839	}
		1840	while (slf_frame.check (aTHX_ &slf_frame));
		1841
		1842	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1843
		1844	/* exception handling */
		1845	if (expect_false (CORO_THROW))
		1846	{
		1847	SV *exception = sv_2mortal (CORO_THROW);
		1848
		1849	CORO_THROW = 0;
		1850	sv_setsv (ERRSV, exception);
		1851	croak (0);
		1852	}
		1853
		1854	/* return value handling - mostly like entersub */
		1855	/* make sure we put something on the stack in scalar context */
		1856	if (GIMME_V == G_SCALAR)
		1857	{
		1858	dSP;
		1859	SV **bot = PL_stack_base + checkmark;
		1860
		1861	if (sp == bot) /* too few, push undef */
		1862	bot [1] = &PL_sv_undef;
		1863	else if (sp != bot + 1) /* too many, take last one */
		1864	bot [1] = *sp;
		1865
		1866	SP = bot + 1;
		1867
		1868	PUTBACK;
		1869	}
		1870
		1871	return NORMAL;
		1872	}
		1873
		1874	static void
		1875	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1876	{
		1877	int i;
		1878	SV **arg = PL_stack_base + ax;
		1879	int items = PL_stack_sp - arg + 1;
		1880
		1881	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1882
		1883	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1884	&& PL_op->op_ppaddr != pp_slf)
		1885	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1886
		1887	CvFLAGS (cv) |= CVf_SLF;
		1888	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1889	slf_cv = cv;
		1890
		1891	/* we patch the op, and then re-run the whole call */
		1892	/* we have to put the same argument on the stack for this to work */
		1893	/* and this will be done by pp_restore */
		1894	slf_restore.op_next = (OP *)&slf_restore;
		1895	slf_restore.op_type = OP_CUSTOM;
		1896	slf_restore.op_ppaddr = pp_restore;
		1897	slf_restore.op_first = PL_op;
		1898
		1899	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1900
		1901	if (PL_op->op_flags & OPf_STACKED)
		1902	{
		1903	if (items > slf_arga)
		1904	{
		1905	slf_arga = items;
		1906	free (slf_argv);
		1907	slf_argv = malloc (slf_arga * sizeof (SV *));
		1908	}
		1909
		1910	slf_argc = items;
		1911
		1912	for (i = 0; i < items; ++i)
		1913	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1914	}
		1915	else
		1916	slf_argc = 0;
		1917
		1918	PL_op->op_ppaddr = pp_slf;
		1919	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1920
		1921	PL_op = (OP *)&slf_restore;
		1922	}
1751		1923
1752	/*****************************************************************************/	1924	/*****************************************************************************/
1753	/* PerlIO::cede */	1925	/* PerlIO::cede */
1754		1926
1755	typedef struct	1927	typedef struct
…		…
1783	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1955	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1784	double now = nvtime ();	1956	double now = nvtime ();
1785		1957
1786	if (now >= self->next)	1958	if (now >= self->next)
1787	{	1959	{
1788	api_cede ();	1960	api_cede (aTHX);
1789	self->next = now + self->every;	1961	self->next = now + self->every;
1790	}	1962	}
1791		1963
1792	return PerlIOBuf_flush (aTHX_ f);	1964	return PerlIOBuf_flush (aTHX_ f);
1793	}	1965	}
…		…
1823	PerlIOBuf_get_cnt,	1995	PerlIOBuf_get_cnt,
1824	PerlIOBuf_set_ptrcnt,	1996	PerlIOBuf_set_ptrcnt,
1825	};	1997	};
1826		1998
1827	/*****************************************************************************/	1999	/*****************************************************************************/
		2000	/* Coro::Semaphore & Coro::Signal */
1828		2001
1829	static const CV *ssl_cv; /* for quick consistency check */
1830
1831	static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1832	static SV *ssl_arg0;
1833	static SV *ssl_arg1;
1834
1835	/* this restores the stack in the case we patched the entersub, to */
1836	/* recreate the stack frame as perl will on following calls */
1837	/* since entersub cleared the stack */
1838	static OP *	2002	static SV *
1839	pp_restore (pTHX)	2003	coro_waitarray_new (pTHX_ int count)
1840	{	2004	{
		2005	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2006	AV *av = newAV ();
		2007	SV **ary;
		2008
		2009	/* unfortunately, building manually saves memory */
		2010	Newx (ary, 2, SV *);
		2011	AvALLOC (av) = ary;
		2012	AvARRAY (av) = ary;
		2013	AvMAX (av) = 1;
		2014	AvFILLp (av) = 0;
		2015	ary [0] = newSViv (count);
		2016
		2017	return newRV_noinc ((SV *)av);
		2018	}
		2019
		2020	/* semaphore */
		2021
		2022	static void
		2023	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2024	{
		2025	SV *count_sv = AvARRAY (av)[0];
		2026	IV count = SvIVX (count_sv);
		2027
		2028	count += adjust;
		2029	SvIVX (count_sv) = count;
		2030
		2031	/* now wake up as many waiters as are expected to lock */
		2032	while (count > 0 && AvFILLp (av) > 0)
		2033	{
		2034	SV *cb;
		2035
		2036	/* swap first two elements so we can shift a waiter */
		2037	AvARRAY (av)[0] = AvARRAY (av)[1];
		2038	AvARRAY (av)[1] = count_sv;
		2039	cb = av_shift (av);
		2040
		2041	if (SvOBJECT (cb))
		2042	api_ready (aTHX_ cb);
		2043	else
		2044	croak ("callbacks not yet supported");
		2045
		2046	SvREFCNT_dec (cb);
		2047
		2048	--count;
		2049	}
		2050	}
		2051
		2052	static void
		2053	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2054	{
		2055	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2056	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2057	}
		2058
		2059	static int
		2060	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
		2061	{
		2062	AV *av = (AV *)frame->data;
		2063	SV *count_sv = AvARRAY (av)[0];
		2064
		2065	/* if we are about to throw, don't actually acquire the lock, just throw */
		2066	if (CORO_THROW)
		2067	return 0;
		2068	else if (SvIVX (count_sv) > 0)
		2069	{
		2070	SvSTATE_current->on_destroy = 0;
		2071
		2072	if (acquire)
		2073	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2074	else
		2075	coro_semaphore_adjust (aTHX_ av, 0);
		2076
		2077	return 0;
		2078	}
		2079	else
		2080	{
		2081	int i;
		2082	/* if we were woken up but can't down, we look through the whole */
		2083	/* waiters list and only add us if we aren't in there already */
		2084	/* this avoids some degenerate memory usage cases */
		2085
		2086	for (i = 1; i <= AvFILLp (av); ++i)
		2087	if (AvARRAY (av)[i] == SvRV (coro_current))
		2088	return 1;
		2089
		2090	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2091	return 1;
		2092	}
		2093	}
		2094
		2095	static int
		2096	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2097	{
		2098	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2099	}
		2100
		2101	static int
		2102	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2103	{
		2104	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2105	}
		2106
		2107	static void
		2108	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2109	{
		2110	AV *av = (AV *)SvRV (arg [0]);
		2111
		2112	if (SvIVX (AvARRAY (av)[0]) > 0)
		2113	{
		2114	frame->data = (void *)av;
		2115	frame->prepare = prepare_nop;
		2116	}
		2117	else
		2118	{
		2119	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2120
		2121	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2122	frame->prepare = prepare_schedule;
		2123
		2124	/* to avoid race conditions when a woken-up coro gets terminated */
		2125	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2126	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2127	}
		2128	}
		2129
		2130	static void
		2131	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2132	{
		2133	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2134	frame->check = slf_check_semaphore_down;
		2135	}
		2136
		2137	static void
		2138	slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2139	{
		2140	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2141	frame->check = slf_check_semaphore_wait;
		2142	}
		2143
		2144	/* signal */
		2145
		2146	static void
		2147	coro_signal_wake (pTHX_ AV *av, int count)
		2148	{
		2149	SvIVX (AvARRAY (av)[0]) = 0;
		2150
		2151	/* now signal count waiters */
		2152	while (count > 0 && AvFILLp (av) > 0)
		2153	{
		2154	SV *cb;
		2155
		2156	/* swap first two elements so we can shift a waiter */
		2157	cb = AvARRAY (av)[0];
		2158	AvARRAY (av)[0] = AvARRAY (av)[1];
		2159	AvARRAY (av)[1] = cb;
		2160
		2161	cb = av_shift (av);
		2162
		2163	api_ready (cb);
		2164	sv_setiv (cb, 0); /* signal waiter */
		2165	SvREFCNT_dec (cb);
		2166
		2167	--count;
		2168	}
		2169	}
		2170
		2171	static int
		2172	slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
		2173	{
		2174	/* if we are about to throw, also stop waiting */
		2175	return SvROK ((SV *)frame->data) && !CORO_THROW;
		2176	}
		2177
		2178	static void
		2179	slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2180	{
		2181	AV *av = (AV *)SvRV (arg [0]);
		2182
		2183	if (SvIVX (AvARRAY (av)[0]))
		2184	{
		2185	SvIVX (AvARRAY (av)[0]) = 0;
		2186	frame->prepare = prepare_nop;
		2187	frame->check = slf_check_nop;
		2188	}
		2189	else
		2190	{
		2191	SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
		2192
		2193	av_push (av, waiter);
		2194
		2195	frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
		2196	frame->prepare = prepare_schedule;
		2197	frame->check = slf_check_signal_wait;
		2198	}
		2199	}
		2200
		2201	/*****************************************************************************/
		2202	/* gensub: simple closure generation utility */
		2203
		2204	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2205
		2206	/* create a closure from XS, returns a code reference */
		2207	/* the arg can be accessed via GENSUB_ARG from the callback */
		2208	/* the callback must use dXSARGS/XSRETURN */
		2209	static SV *
		2210	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2211	{
		2212	CV *cv = (CV *)newSV (0);
		2213
		2214	sv_upgrade ((SV *)cv, SVt_PVCV);
		2215
		2216	CvANON_on (cv);
		2217	CvISXSUB_on (cv);
		2218	CvXSUB (cv) = xsub;
		2219	GENSUB_ARG = arg;
		2220
		2221	return newRV_noinc ((SV *)cv);
		2222	}
		2223
		2224	/*****************************************************************************/
		2225	/* Coro::AIO */
		2226
		2227	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2228
		2229	/* helper storage struct */
		2230	struct io_state
		2231	{
		2232	int errorno;
		2233	I32 laststype; /* U16 in 5.10.0 */
		2234	int laststatval;
		2235	Stat_t statcache;
		2236	};
		2237
		2238	static void
		2239	coro_aio_callback (pTHX_ CV *cv)
		2240	{
		2241	dXSARGS;
		2242	AV *state = (AV *)GENSUB_ARG;
		2243	SV *coro = av_pop (state);
		2244	SV *data_sv = newSV (sizeof (struct io_state));
		2245
		2246	av_extend (state, items);
		2247
		2248	sv_upgrade (data_sv, SVt_PV);
		2249	SvCUR_set (data_sv, sizeof (struct io_state));
		2250	SvPOK_only (data_sv);
		2251
		2252	{
		2253	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2254
		2255	data->errorno = errno;
		2256	data->laststype = PL_laststype;
		2257	data->laststatval = PL_laststatval;
		2258	data->statcache = PL_statcache;
		2259	}
		2260
		2261	/* now build the result vector out of all the parameters and the data_sv */
		2262	{
		2263	int i;
		2264
		2265	for (i = 0; i < items; ++i)
		2266	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2267	}
		2268
		2269	av_push (state, data_sv);
		2270
		2271	api_ready (aTHX_ coro);
		2272	SvREFCNT_dec (coro);
		2273	SvREFCNT_dec ((AV *)state);
		2274	}
		2275
		2276	static int
		2277	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2278	{
		2279	AV *state = (AV *)frame->data;
		2280
		2281	/* if we are about to throw, return early */
		2282	/* this does not cancel the aio request, but at least */
		2283	/* it quickly returns */
		2284	if (CORO_THROW)
		2285	return 0;
		2286
		2287	/* one element that is an RV? repeat! */
		2288	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2289	return 1;
		2290
		2291	/* restore status */
		2292	{
		2293	SV *data_sv = av_pop (state);
		2294	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2295
		2296	errno = data->errorno;
		2297	PL_laststype = data->laststype;
		2298	PL_laststatval = data->laststatval;
		2299	PL_statcache = data->statcache;
		2300
		2301	SvREFCNT_dec (data_sv);
		2302	}
		2303
		2304	/* push result values */
		2305	{
1841	dSP;	2306	dSP;
		2307	int i;
1842		2308
		2309	EXTEND (SP, AvFILLp (state) + 1);
		2310	for (i = 0; i <= AvFILLp (state); ++i)
		2311	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2312
		2313	PUTBACK;
		2314	}
		2315
		2316	return 0;
		2317	}
		2318
		2319	static void
		2320	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2321	{
		2322	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2323	SV *coro_hv = SvRV (coro_current);
		2324	struct coro *coro = SvSTATE_hv (coro_hv);
		2325
		2326	/* put our coroutine id on the state arg */
		2327	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2328
		2329	/* first see whether we have a non-zero priority and set it as AIO prio */
		2330	if (coro->prio)
		2331	{
		2332	dSP;
		2333
		2334	static SV *prio_cv;
		2335	static SV *prio_sv;
		2336
		2337	if (expect_false (!prio_cv))
		2338	{
		2339	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2340	prio_sv = newSViv (0);
		2341	}
		2342
		2343	PUSHMARK (SP);
		2344	sv_setiv (prio_sv, coro->prio);
		2345	XPUSHs (prio_sv);
		2346
		2347	PUTBACK;
		2348	call_sv (prio_cv, G_VOID | G_DISCARD);
		2349	}
		2350
		2351	/* now call the original request */
		2352	{
		2353	dSP;
		2354	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2355	int i;
		2356
1843	PUSHMARK (SP);	2357	PUSHMARK (SP);
1844		2358
1845	EXTEND (SP, 3);	2359	/* first push all args to the stack */
1846	if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;	2360	EXTEND (SP, items + 1);
1847	if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1848	PUSHs ((SV *)CvGV (ssl_cv));
1849		2361
1850	RETURNOP (ssl_restore.op_first);	2362	for (i = 0; i < items; ++i)
1851	}	2363	PUSHs (arg [i]);
1852		2364
1853	/* declare prototype */	2365	/* now push the callback closure */
1854	XS(XS_Coro__State__set_stacklevel);	2366	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1855		2367
1856	static OP *	2368	/* now call the AIO function - we assume our request is uncancelable */
1857	pp_set_stacklevel (pTHX)
1858	{
1859	dSP;
1860	struct transfer_args ta;
1861	SV **arg = PL_stack_base + TOPMARK + 1;
1862	int items = SP - arg; /* args without function object */
1863
1864	/* do a quick consistency check on the "function" object, and if it isn't */
1865	/* for us, divert to the real entersub */
1866	if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1867	return PL_ppaddr[OP_ENTERSUB](aTHX);
1868
1869	/* pop args */
1870	SP = PL_stack_base + POPMARK;
1871
1872	if (!(PL_op->op_flags & OPf_STACKED))
1873	{
1874	/* ampersand-form of call, use @_ instead of stack */
1875	AV *av = GvAV (PL_defgv);
1876	arg = AvARRAY (av);
1877	items = AvFILLp (av) + 1;
1878	}
1879
1880	PUTBACK;	2369	PUTBACK;
1881	switch (PL_op->op_private & 7)	2370	call_sv ((SV *)req, G_VOID | G_DISCARD);
1882	{
1883	case 0:
1884	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1885	break;
1886
1887	case 1:
1888	if (items != 2)
1889	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1890
1891	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1892	break;
1893
1894	case 2:
1895	prepare_schedule (aTHX_ &ta);
1896	break;
1897
1898	case 3:
1899	prepare_cede (aTHX_ &ta);
1900	break;
1901
1902	case 4:
1903	if (!prepare_cede_notself (aTHX_ &ta))
1904	goto skip;
1905
1906	break;
1907	}	2371	}
1908		2372
1909	TRANSFER (ta, 0);	2373	/* now that the requets is going, we loop toll we have a result */
1910	SPAGAIN;	2374	frame->data = (void *)state;
1911		2375	frame->prepare = prepare_schedule;
1912	skip:	2376	frame->check = slf_check_aio_req;
1913	PUTBACK;
1914	SSL_TAIL;
1915	SPAGAIN;
1916	RETURN;
1917	}	2377	}
		2378
		2379	static void
		2380	coro_aio_req_xs (pTHX_ CV *cv)
		2381	{
		2382	dXSARGS;
		2383
		2384	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2385
		2386	XSRETURN_EMPTY;
		2387	}
		2388
		2389	/*****************************************************************************/
1918		2390
1919	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2391	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1920		2392
1921	PROTOTYPES: DISABLE	2393	PROTOTYPES: DISABLE
1922		2394
1923	# these not obviously related functions are all rolled into the same xs
1924	# function to increase chances that they all will call transfer with the same
1925	# stack offset
1926	void
1927	_set_stacklevel (...)
1928	ALIAS:
1929	Coro::State::transfer = 1
1930	Coro::schedule = 2
1931	Coro::cede = 3
1932	Coro::cede_notself = 4
1933	CODE:
1934	{
1935	assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1936
1937	/* we patch the op, and then re-run the whole call */
1938	/* we have to put some dummy argument on the stack for this to work */
1939	/* TODO: walk back the opcode chain (but how?), nuke the pp_gv etc. */
1940	ssl_restore.op_next = (OP *)&ssl_restore;
1941	ssl_restore.op_type = OP_NULL;
1942	ssl_restore.op_ppaddr = pp_restore;
1943	ssl_restore.op_first = PL_op;
1944
1945	ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1946	ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1947
1948	PL_op->op_ppaddr = pp_set_stacklevel;
1949	PL_op->op_private = PL_op->op_private & ~7 | ix; /* we potentially share our private flags with entersub */
1950
1951	PL_op = (OP *)&ssl_restore;
1952	}
1953
1954	BOOT:	2395	BOOT:
1955	{	2396	{
1956	#ifdef USE_ITHREADS	2397	#ifdef USE_ITHREADS
1957	MUTEX_INIT (&coro_lock);
1958	# if CORO_PTHREAD	2398	# if CORO_PTHREAD
1959	coro_thx = PERL_GET_CONTEXT;	2399	coro_thx = PERL_GET_CONTEXT;
1960	# endif	2400	# endif
1961	#endif	2401	#endif
1962	BOOT_PAGESIZE;	2402	BOOT_PAGESIZE;
1963
1964	ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0);
1965		2403
1966	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	2404	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1967	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	2405	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1968		2406
1969	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;	2407	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
…		…
1985	main_top_env = PL_top_env;	2423	main_top_env = PL_top_env;
1986		2424
1987	while (main_top_env->je_prev)	2425	while (main_top_env->je_prev)
1988	main_top_env = main_top_env->je_prev;	2426	main_top_env = main_top_env->je_prev;
1989		2427
		2428	{
		2429	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2430
		2431	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2432	hv_store_ent (PL_custom_op_names, slf,
		2433	newSVpv ("coro_slf", 0), 0);
		2434
		2435	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2436	hv_store_ent (PL_custom_op_descs, slf,
		2437	newSVpv ("coro schedule like function", 0), 0);
		2438	}
		2439
1990	coroapi.ver = CORO_API_VERSION;	2440	coroapi.ver = CORO_API_VERSION;
1991	coroapi.rev = CORO_API_REVISION;	2441	coroapi.rev = CORO_API_REVISION;
		2442
1992	coroapi.transfer = api_transfer;	2443	coroapi.transfer = api_transfer;
		2444
		2445	coroapi.sv_state = SvSTATE_;
		2446	coroapi.execute_slf = api_execute_slf;
		2447	coroapi.prepare_nop = prepare_nop;
		2448	coroapi.prepare_schedule = prepare_schedule;
		2449	coroapi.prepare_cede = prepare_cede;
		2450	coroapi.prepare_cede_notself = prepare_cede_notself;
1993		2451
1994	{	2452	{
1995	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2453	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1996		2454
1997	if (!svp) croak ("Time::HiRes is required");	2455	if (!svp) croak ("Time::HiRes is required");
…		…
2029	for (i = 1; i < items; i++)	2487	for (i = 1; i < items; i++)
2030	av_push (coro->args, newSVsv (ST (i)));	2488	av_push (coro->args, newSVsv (ST (i)));
2031	}	2489	}
2032	OUTPUT:	2490	OUTPUT:
2033	RETVAL	2491	RETVAL
		2492
		2493	void
		2494	transfer (...)
		2495	PROTOTYPE: $$
		2496	CODE:
		2497	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2034		2498
2035	bool	2499	bool
2036	_destroy (SV *coro_sv)	2500	_destroy (SV *coro_sv)
2037	CODE:	2501	CODE:
2038	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2502	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2045	CODE:	2509	CODE:
2046	_exit (code);	2510	_exit (code);
2047		2511
2048	int	2512	int
2049	cctx_stacksize (int new_stacksize = 0)	2513	cctx_stacksize (int new_stacksize = 0)
		2514	PROTOTYPE: ;$
2050	CODE:	2515	CODE:
2051	RETVAL = cctx_stacksize;	2516	RETVAL = cctx_stacksize;
2052	if (new_stacksize)	2517	if (new_stacksize)
2053	{	2518	{
2054	cctx_stacksize = new_stacksize;	2519	cctx_stacksize = new_stacksize;
…		…
2057	OUTPUT:	2522	OUTPUT:
2058	RETVAL	2523	RETVAL
2059		2524
2060	int	2525	int
2061	cctx_max_idle (int max_idle = 0)	2526	cctx_max_idle (int max_idle = 0)
		2527	PROTOTYPE: ;$
2062	CODE:	2528	CODE:
2063	RETVAL = cctx_max_idle;	2529	RETVAL = cctx_max_idle;
2064	if (max_idle > 1)	2530	if (max_idle > 1)
2065	cctx_max_idle = max_idle;	2531	cctx_max_idle = max_idle;
2066	OUTPUT:	2532	OUTPUT:
2067	RETVAL	2533	RETVAL
2068		2534
2069	int	2535	int
2070	cctx_count ()	2536	cctx_count ()
		2537	PROTOTYPE:
2071	CODE:	2538	CODE:
2072	RETVAL = cctx_count;	2539	RETVAL = cctx_count;
2073	OUTPUT:	2540	OUTPUT:
2074	RETVAL	2541	RETVAL
2075		2542
2076	int	2543	int
2077	cctx_idle ()	2544	cctx_idle ()
		2545	PROTOTYPE:
2078	CODE:	2546	CODE:
2079	RETVAL = cctx_idle;	2547	RETVAL = cctx_idle;
2080	OUTPUT:	2548	OUTPUT:
2081	RETVAL	2549	RETVAL
2082		2550
2083	void	2551	void
2084	list ()	2552	list ()
		2553	PROTOTYPE:
2085	PPCODE:	2554	PPCODE:
2086	{	2555	{
2087	struct coro *coro;	2556	struct coro *coro;
2088	for (coro = coro_first; coro; coro = coro->next)	2557	for (coro = coro_first; coro; coro = coro->next)
2089	if (coro->hv)	2558	if (coro->hv)
…		…
2151		2620
2152	void	2621	void
2153	throw (Coro::State self, SV *throw = &PL_sv_undef)	2622	throw (Coro::State self, SV *throw = &PL_sv_undef)
2154	PROTOTYPE: $;$	2623	PROTOTYPE: $;$
2155	CODE:	2624	CODE:
		2625	{
		2626	struct coro *current = SvSTATE_current;
		2627	SV **throwp = self == current ? &CORO_THROW : &self->except;
2156	SvREFCNT_dec (self->throw);	2628	SvREFCNT_dec (*throwp);
2157	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2629	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2630	}
2158		2631
2159	void	2632	void
2160	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2633	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2634	PROTOTYPE: $;$
		2635	C_ARGS: aTHX_ coro, flags
2161		2636
2162	SV *	2637	SV *
2163	has_cctx (Coro::State coro)	2638	has_cctx (Coro::State coro)
2164	PROTOTYPE: $	2639	PROTOTYPE: $
2165	CODE:	2640	CODE:
…		…
2189	OUTPUT:	2664	OUTPUT:
2190	RETVAL	2665	RETVAL
2191		2666
2192	void	2667	void
2193	force_cctx ()	2668	force_cctx ()
		2669	PROTOTYPE:
2194	CODE:	2670	CODE:
2195	struct coro *coro = SvSTATE (coro_current);
2196	coro->cctx->idle_sp = 0;	2671	SvSTATE_current->cctx->idle_sp = 0;
2197		2672
2198	void	2673	void
2199	swap_defsv (Coro::State self)	2674	swap_defsv (Coro::State self)
2200	PROTOTYPE: $	2675	PROTOTYPE: $
2201	ALIAS:	2676	ALIAS:
2202	swap_defav = 1	2677	swap_defav = 1
2203	CODE:	2678	CODE:
2204	if (!self->slot)	2679	if (!self->slot)
2205	croak ("cannot swap state with coroutine that has no saved state");	2680	croak ("cannot swap state with coroutine that has no saved state,");
2206	else	2681	else
2207	{	2682	{
2208	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2683	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2209	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2684	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2210		2685
2211	SV *tmp = *src; *src = *dst; *dst = tmp;	2686	SV *tmp = *src; *src = *dst; *dst = tmp;
2212	}	2687	}
		2688
2213		2689
2214	MODULE = Coro::State PACKAGE = Coro	2690	MODULE = Coro::State PACKAGE = Coro
2215		2691
2216	BOOT:	2692	BOOT:
2217	{	2693	{
…		…
2242	coroapi.schedule = api_schedule;	2718	coroapi.schedule = api_schedule;
2243	coroapi.cede = api_cede;	2719	coroapi.cede = api_cede;
2244	coroapi.cede_notself = api_cede_notself;	2720	coroapi.cede_notself = api_cede_notself;
2245	coroapi.ready = api_ready;	2721	coroapi.ready = api_ready;
2246	coroapi.is_ready = api_is_ready;	2722	coroapi.is_ready = api_is_ready;
2247	coroapi.nready = &coro_nready;	2723	coroapi.nready = coro_nready;
2248	coroapi.current = coro_current;	2724	coroapi.current = coro_current;
2249		2725
2250	GCoroAPI = &coroapi;	2726	/*GCoroAPI = &coroapi;*/
2251	sv_setiv (sv, (IV)&coroapi);	2727	sv_setiv (sv, (IV)&coroapi);
2252	SvREADONLY_on (sv);	2728	SvREADONLY_on (sv);
2253	}	2729	}
2254	}	2730	}
		2731
		2732	void
		2733	schedule (...)
		2734	CODE:
		2735	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2736
		2737	void
		2738	cede (...)
		2739	CODE:
		2740	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2741
		2742	void
		2743	cede_notself (...)
		2744	CODE:
		2745	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2255		2746
2256	void	2747	void
2257	_set_current (SV *current)	2748	_set_current (SV *current)
2258	PROTOTYPE: $	2749	PROTOTYPE: $
2259	CODE:	2750	CODE:
…		…
2262		2753
2263	void	2754	void
2264	_set_readyhook (SV *hook)	2755	_set_readyhook (SV *hook)
2265	PROTOTYPE: $	2756	PROTOTYPE: $
2266	CODE:	2757	CODE:
2267	LOCK;
2268	SvREFCNT_dec (coro_readyhook);	2758	SvREFCNT_dec (coro_readyhook);
2269	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2759	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2270	UNLOCK;
2271		2760
2272	int	2761	int
2273	prio (Coro::State coro, int newprio = 0)	2762	prio (Coro::State coro, int newprio = 0)
		2763	PROTOTYPE: $;$
2274	ALIAS:	2764	ALIAS:
2275	nice = 1	2765	nice = 1
2276	CODE:	2766	CODE:
2277	{	2767	{
2278	RETVAL = coro->prio;	2768	RETVAL = coro->prio;
…		…
2293		2783
2294	SV *	2784	SV *
2295	ready (SV *self)	2785	ready (SV *self)
2296	PROTOTYPE: $	2786	PROTOTYPE: $
2297	CODE:	2787	CODE:
2298	RETVAL = boolSV (api_ready (self));	2788	RETVAL = boolSV (api_ready (aTHX_ self));
2299	OUTPUT:	2789	OUTPUT:
2300	RETVAL	2790	RETVAL
2301		2791
2302	int	2792	int
2303	nready (...)	2793	nready (...)
…		…
2310	# for async_pool speedup	2800	# for async_pool speedup
2311	void	2801	void
2312	_pool_1 (SV *cb)	2802	_pool_1 (SV *cb)
2313	CODE:	2803	CODE:
2314	{	2804	{
2315	struct coro *coro = SvSTATE (coro_current);
2316	HV *hv = (HV *)SvRV (coro_current);	2805	HV *hv = (HV *)SvRV (coro_current);
		2806	struct coro *coro = SvSTATE_hv ((SV *)hv);
2317	AV *defav = GvAV (PL_defgv);	2807	AV *defav = GvAV (PL_defgv);
2318	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2808	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2319	AV *invoke_av;	2809	AV *invoke_av;
2320	int i, len;	2810	int i, len;
2321		2811
…		…
2342	{	2832	{
2343	av_fill (defav, len - 1);	2833	av_fill (defav, len - 1);
2344	for (i = 0; i < len; ++i)	2834	for (i = 0; i < len; ++i)
2345	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2835	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2346	}	2836	}
2347
2348	SvREFCNT_dec (invoke);
2349	}	2837	}
2350		2838
2351	void	2839	void
2352	_pool_2 (SV *cb)	2840	_pool_2 (SV *cb)
2353	CODE:	2841	CODE:
2354	{	2842	{
2355	struct coro *coro = SvSTATE (coro_current);	2843	HV *hv = (HV *)SvRV (coro_current);
		2844	struct coro *coro = SvSTATE_hv ((SV *)hv);
2356		2845
2357	sv_setsv (cb, &PL_sv_undef);	2846	sv_setsv (cb, &PL_sv_undef);
2358		2847
2359	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2848	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2360	coro->saved_deffh = 0;	2849	coro->saved_deffh = 0;
…		…
2367	SvREFCNT_dec (old);	2856	SvREFCNT_dec (old);
2368	croak ("\3async_pool terminate\2\n");	2857	croak ("\3async_pool terminate\2\n");
2369	}	2858	}
2370		2859
2371	av_clear (GvAV (PL_defgv));	2860	av_clear (GvAV (PL_defgv));
2372	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2861	hv_store (hv, "desc", sizeof ("desc") - 1,
2373	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2862	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2374		2863
2375	coro->prio = 0;	2864	coro->prio = 0;
2376		2865
2377	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2866	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2378	api_trace (coro_current, 0);	2867	api_trace (aTHX_ coro_current, 0);
2379		2868
2380	av_push (av_async_pool, newSVsv (coro_current));	2869	av_push (av_async_pool, newSVsv (coro_current));
2381	}	2870	}
2382		2871
2383	#if 0
2384		2872
2385	void	2873	MODULE = Coro::State PACKAGE = PerlIO::cede
2386	_generator_call (...)	2874
2387	PROTOTYPE: @	2875	BOOT:
2388	PPCODE:	2876	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2389	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);	2877
2390	xxxx	2878
2391	abort ();	2879	MODULE = Coro::State PACKAGE = Coro::Semaphore
2392		2880
2393	SV *	2881	SV *
2394	gensub (SV *sub, ...)	2882	new (SV *klass, SV *count = 0)
2395	PROTOTYPE: &;@	2883	CODE:
2396	CODE:	2884	RETVAL = sv_bless (
2397	{	2885	coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
2398	struct coro *coro;	2886	GvSTASH (CvGV (cv))
2399	MAGIC *mg;	2887	);
2400	CV *xcv;
2401	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2402	int i;
2403
2404	CvGV (ncv) = CvGV (cv);
2405	CvFILE (ncv) = CvFILE (cv);
2406
2407	Newz (0, coro, 1, struct coro);
2408	coro->args = newAV ();
2409	coro->flags = CF_NEW;
2410
2411	av_extend (coro->args, items - 1);
2412	for (i = 1; i < items; i++)
2413	av_push (coro->args, newSVsv (ST (i)));
2414
2415	CvISXSUB_on (ncv);
2416	CvXSUBANY (ncv).any_ptr = (void *)coro;
2417
2418	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2419
2420	CvXSUB (ncv) = CvXSUB (xcv);
2421	CvANON_on (ncv);
2422
2423	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2424	RETVAL = newRV_noinc ((SV *)ncv);
2425	}
2426	OUTPUT:	2888	OUTPUT:
2427	RETVAL	2889	RETVAL
2428		2890
2429	#endif	2891	# helper for Coro::Channel
		2892	SV *
		2893	_alloc (int count)
		2894	CODE:
		2895	RETVAL = coro_waitarray_new (aTHX_ count);
		2896	OUTPUT:
		2897	RETVAL
2430		2898
2431		2899	SV *
2432	MODULE = Coro::State PACKAGE = Coro::AIO	2900	count (SV *self)
		2901	CODE:
		2902	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2903	OUTPUT:
		2904	RETVAL
2433		2905
2434	void	2906	void
2435	_get_state (SV *self)	2907	up (SV *self, int adjust = 1)
2436	PPCODE:	2908	ALIAS:
2437	{	2909	adjust = 1
2438	AV *defav = GvAV (PL_defgv);	2910	CODE:
2439	AV *av = newAV ();	2911	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2440	int i;
2441	SV *data_sv = newSV (sizeof (struct io_state));
2442	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2443	SvCUR_set (data_sv, sizeof (struct io_state));
2444	SvPOK_only (data_sv);
2445
2446	data->errorno = errno;
2447	data->laststype = PL_laststype;
2448	data->laststatval = PL_laststatval;
2449	data->statcache = PL_statcache;
2450
2451	av_extend (av, AvFILLp (defav) + 1 + 1);
2452
2453	for (i = 0; i <= AvFILLp (defav); ++i)
2454	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2455
2456	av_push (av, data_sv);
2457
2458	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2459
2460	api_ready (self);
2461	}
2462		2912
2463	void	2913	void
2464	_set_state (SV *state)	2914	down (SV *self)
2465	PROTOTYPE: $	2915	CODE:
		2916	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2917
		2918	void
		2919	wait (SV *self)
		2920	CODE:
		2921	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
		2922
		2923	void
		2924	try (SV *self)
		2925	PPCODE:
		2926	{
		2927	AV *av = (AV *)SvRV (self);
		2928	SV *count_sv = AvARRAY (av)[0];
		2929	IV count = SvIVX (count_sv);
		2930
		2931	if (count > 0)
		2932	{
		2933	--count;
		2934	SvIVX (count_sv) = count;
		2935	XSRETURN_YES;
		2936	}
		2937	else
		2938	XSRETURN_NO;
		2939	}
		2940
		2941	void
		2942	waiters (SV *self)
		2943	PPCODE:
		2944	{
		2945	AV *av = (AV *)SvRV (self);
		2946	int wcount = AvFILLp (av) + 1 - 1;
		2947
		2948	if (GIMME_V == G_SCALAR)
		2949	XPUSHs (sv_2mortal (newSViv (wcount)));
		2950	else
		2951	{
		2952	int i;
		2953	EXTEND (SP, wcount);
		2954	for (i = 1; i <= wcount; ++i)
		2955	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
		2956	}
		2957	}
		2958
		2959	MODULE = Coro::State PACKAGE = Coro::Signal
		2960
		2961	SV *
		2962	new (SV *klass)
2466	PPCODE:	2963	CODE:
		2964	RETVAL = sv_bless (
		2965	coro_waitarray_new (aTHX_ 0),
		2966	GvSTASH (CvGV (cv))
		2967	);
		2968	OUTPUT:
		2969	RETVAL
		2970
		2971	void
		2972	wait (SV *self)
		2973	CODE:
		2974	CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
		2975
		2976	void
		2977	broadcast (SV *self)
		2978	CODE:
2467	{	2979	{
2468	AV *av = (AV *)SvRV (state);	2980	AV *av = (AV *)SvRV (self);
2469	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);	2981	coro_signal_wake (aTHX_ av, AvFILLp (av));
2470	int i;	2982	}
2471		2983
2472	errno = data->errorno;	2984	void
2473	PL_laststype = data->laststype;	2985	send (SV *self)
2474	PL_laststatval = data->laststatval;	2986	CODE:
2475	PL_statcache = data->statcache;	2987	{
		2988	AV *av = (AV *)SvRV (self);
2476		2989
2477	EXTEND (SP, AvFILLp (av));	2990	if (AvFILLp (av))
2478	for (i = 0; i < AvFILLp (av); ++i)	2991	coro_signal_wake (av, 1);
2479	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	2992	else
		2993	SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2480	}	2994	}
		2995
		2996	IV
		2997	awaited (SV *self)
		2998	CODE:
		2999	RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
		3000	OUTPUT:
		3001	RETVAL
2481		3002
2482		3003
2483	MODULE = Coro::State PACKAGE = Coro::AnyEvent	3004	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2484		3005
2485	BOOT:	3006	BOOT:
2486	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	3007	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2487		3008
2488	SV *	3009	void
2489	_schedule (...)	3010	_schedule (...)
2490	PROTOTYPE: @
2491	CODE:	3011	CODE:
2492	{	3012	{
2493	static int incede;	3013	static int incede;
2494		3014
2495	api_cede_notself ();	3015	api_cede_notself (aTHX);
2496		3016
2497	++incede;	3017	++incede;
2498	while (coro_nready >= incede && api_cede ())	3018	while (coro_nready >= incede && api_cede (aTHX))
2499	;	3019	;
2500		3020
2501	sv_setsv (sv_activity, &PL_sv_undef);	3021	sv_setsv (sv_activity, &PL_sv_undef);
2502	if (coro_nready >= incede)	3022	if (coro_nready >= incede)
2503	{	3023	{
2504	PUSHMARK (SP);	3024	PUSHMARK (SP);
2505	PUTBACK;	3025	PUTBACK;
2506	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);	3026	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2507	SPAGAIN;
2508	}	3027	}
2509		3028
2510	--incede;	3029	--incede;
2511	}	3030	}
2512		3031
2513		3032
2514	MODULE = Coro::State PACKAGE = PerlIO::cede	3033	MODULE = Coro::State PACKAGE = Coro::AIO
2515		3034
2516	BOOT:	3035	void
2517	PerlIO_define_layer (aTHX_ &PerlIO_cede);	3036	_register (char *target, char *proto, SV *req)
		3037	CODE:
		3038	{
		3039	HV *st;
		3040	GV *gvp;
		3041	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		3042	/* newXSproto doesn't return the CV on 5.8 */
		3043	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		3044	sv_setpv ((SV *)slf_cv, proto);
		3045	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		3046	}
2518		3047

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