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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.257 by root, Sun Nov 9 15:35:44 2008 UTC vs.
Revision 1.298 by root, Tue Nov 18 23:20:41 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
…		…
98	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
99	#endif	96	#endif
100	#ifndef newSV	97	#ifndef newSV
101	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
102	#endif	99	#endif
		100	#ifndef CvISXSUB_on
		101	# define CvISXSUB_on(cv) (void)cv
		102	#endif
103		103
104	/* 5.8.7 */	104	/* 5.8.7 */
105	#ifndef SvRV_set	105	#ifndef SvRV_set
106	# define SvRV_set(s,v) SvRV(s) = (v)	106	# define SvRV_set(s,v) SvRV(s) = (v)
107	#endif	107	#endif
…		…
119	# define CORO_PREFER_PERL_FUNCTIONS 0	119	# define CORO_PREFER_PERL_FUNCTIONS 0
120	#endif	120	#endif
121		121
122	/* 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
123	* 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
124	#define dSTACKLEVEL volatile char stacklevel	128	# define dSTACKLEVEL volatile void *stacklevel
125	#define STACKLEVEL ((void *)&stacklevel)	129	# define STACKLEVEL ((void *)&stacklevel)
		130	#endif
126		131
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	132	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		133
129	#if __GNUC__ >= 3	134	#if __GNUC__ >= 3
130	# define attribute(x) __attribute__(x)	135	# define attribute(x) __attribute__(x)
131	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132	# define expect(expr,value) __builtin_expect ((expr),(value))	136	# define expect(expr,value) __builtin_expect ((expr),(value))
		137	# define INLINE static inline
133	#else	138	#else
134	# define attribute(x)	139	# define attribute(x)
135	# define BARRIER
136	# define expect(expr,value) (expr)	140	# define expect(expr,value) (expr)
		141	# define INLINE static
137	#endif	142	#endif
138		143
139	#define expect_false(expr) expect ((expr) != 0, 0)	144	#define expect_false(expr) expect ((expr) != 0, 0)
140	#define expect_true(expr) expect ((expr) != 0, 1)	145	#define expect_true(expr) expect ((expr) != 0, 1)
141		146
142	#define NOINLINE attribute ((noinline))	147	#define NOINLINE attribute ((noinline))
143		148
144	#include "CoroAPI.h"	149	#include "CoroAPI.h"
		150	#define GCoroAPI (&coroapi) /* very sneaky */
145		151
146	#ifdef USE_ITHREADS	152	#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	153	# if CORO_PTHREAD
152	static void *coro_thx;	154	static void *coro_thx;
153	# endif	155	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	156	#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		157
177	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);
178		163
179	static U32 cctx_gen;	164	static U32 cctx_gen;
180	static size_t cctx_stacksize = CORO_STACKSIZE;	165	static size_t cctx_stacksize = CORO_STACKSIZE;
181	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
182	static AV *main_mainstack; /* used to differentiate between $main and others */	167	static AV *main_mainstack; /* used to differentiate between $main and others */
…		…
209	CC_TRACE_LINE = 0x10, /* trace each statement */	194	CC_TRACE_LINE = 0x10, /* trace each statement */
210	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	195	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
211	};	196	};
212		197
213	/* this is a structure representing a c-level coroutine */	198	/* this is a structure representing a c-level coroutine */
214	typedef struct coro_cctx {	199	typedef struct coro_cctx
		200	{
215	struct coro_cctx *next;	201	struct coro_cctx *next;
216		202
217	/* the stack */	203	/* the stack */
218	void *sptr;	204	void *sptr;
219	size_t ssize;	205	size_t ssize;
…		…
237	CF_NEW = 0x0004, /* has never been switched to */	223	CF_NEW = 0x0004, /* has never been switched to */
238	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	224	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
239	};	225	};
240		226
241	/* 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 */
242	typedef struct {	228	typedef struct
		229	{
243	SV *defsv;	230	SV *defsv;
244	AV *defav;	231	AV *defav;
245	SV *errsv;	232	SV *errsv;
246	SV *irsgv;	233	SV *irsgv;
247	#define VAR(name,type) type name;	234	#define VAR(name,type) type name;
…		…
251		238
252	#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))
253		240
254	/* this is a structure representing a perl-level coroutine */	241	/* this is a structure representing a perl-level coroutine */
255	struct coro {	242	struct coro {
256	/* the c coroutine allocated to this perl coroutine, if any */	243	/* the C coroutine allocated to this perl coroutine, if any */
257	coro_cctx *cctx;	244	coro_cctx *cctx;
258		245
259	/* process data */	246	/* state data */
		247	struct CoroSLF slf_frame; /* saved slf frame */
260	AV *mainstack;	248	AV *mainstack;
261	perl_slots *slot; /* basically the saved sp */	249	perl_slots *slot; /* basically the saved sp */
262		250
263	AV *args; /* data associated with this coroutine (initial args) */	251	AV *args; /* data associated with this coroutine (initial args) */
264	int refcnt; /* coroutines are refcounted, yes */	252	int refcnt; /* coroutines are refcounted, yes */
265	int flags; /* CF_ flags */	253	int flags; /* CF_ flags */
266	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);
267		256
268	/* statistics */	257	/* statistics */
269	int usecount; /* number of transfers to this coro */	258	int usecount; /* number of transfers to this coro */
270		259
271	/* coro process data */	260	/* coro process data */
272	int prio;	261	int prio;
273	SV *throw; /* exception to be thrown */	262	SV *except; /* exception to be thrown */
274		263
275	/* async_pool */	264	/* async_pool */
276	SV *saved_deffh;	265	SV *saved_deffh;
277		266
278	/* linked list */	267	/* linked list */
279	struct coro *next, *prev;	268	struct coro *next, *prev;
280	};	269	};
281		270
282	typedef struct coro *Coro__State;	271	typedef struct coro *Coro__State;
283	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 */
284		278
285	/** Coro ********************************************************************/	279	/** Coro ********************************************************************/
286		280
287	#define PRIO_MAX 3	281	#define PRIO_MAX 3
288	#define PRIO_HIGH 1	282	#define PRIO_HIGH 1
…		…
293		287
294	/* for Coro.pm */	288	/* for Coro.pm */
295	static SV *coro_current;	289	static SV *coro_current;
296	static SV *coro_readyhook;	290	static SV *coro_readyhook;
297	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	291	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
298	static int coro_nready;
299	static struct coro *coro_first;	292	static struct coro *coro_first;
		293	#define coro_nready coroapi.nready
300		294
301	/** lowlevel stuff **********************************************************/	295	/** lowlevel stuff **********************************************************/
302		296
303	static SV *	297	static SV *
304	coro_get_sv (pTHX_ const char *name, int create)	298	coro_get_sv (pTHX_ const char *name, int create)
…		…
389	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	383	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
390		384
391	return 0;	385	return 0;
392	}	386	}
393		387
394	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	388	#define CORO_MAGIC_type_cv 26
395	#define CORO_MAGIC_type_state PERL_MAGIC_ext	389	#define CORO_MAGIC_type_state PERL_MAGIC_ext
396		390
397	static MGVTBL coro_cv_vtbl = {	391	static MGVTBL coro_cv_vtbl = {
398	0, 0, 0, 0,	392	0, 0, 0, 0,
399	coro_cv_free	393	coro_cv_free
400	};	394	};
401		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
402	#define CORO_MAGIC(sv, type) \	401	#define CORO_MAGIC(sv, type) \
403	SvMAGIC (sv) \	402	(expect_true (SvMAGIC (sv)) \
404	? SvMAGIC (sv)->mg_type == type \	403	? CORO_MAGIC_NN (sv, type) \
405	? SvMAGIC (sv) \
406	: mg_find (sv, type) \
407	: 0	404	: 0)
408		405
409	#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)
410	#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)
411		408
412	static struct coro *	409	INLINE struct coro *
413	SvSTATE_ (pTHX_ SV *coro)	410	SvSTATE_ (pTHX_ SV *coro)
414	{	411	{
415	HV *stash;	412	HV *stash;
416	MAGIC *mg;	413	MAGIC *mg;
417		414
…		…
432	mg = CORO_MAGIC_state (coro);	429	mg = CORO_MAGIC_state (coro);
433	return (struct coro *)mg->mg_ptr;	430	return (struct coro *)mg->mg_ptr;
434	}	431	}
435		432
436	#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))
437		438
438	/* the next two functions merely cache the padlists */	439	/* the next two functions merely cache the padlists */
439	static void	440	static void
440	get_padlist (pTHX_ CV *cv)	441	get_padlist (pTHX_ CV *cv)
441	{	442	{
…		…
508	CvPADLIST (cv) = (AV *)POPs;	509	CvPADLIST (cv) = (AV *)POPs;
509	}	510	}
510		511
511	PUTBACK;	512	PUTBACK;
512	}	513	}
		514
		515	slf_frame = c->slf_frame;
		516	CORO_THROW = c->except;
513	}	517	}
514		518
515	static void	519	static void
516	save_perl (pTHX_ Coro__State c)	520	save_perl (pTHX_ Coro__State c)
517	{	521	{
		522	c->except = CORO_THROW;
		523	c->slf_frame = slf_frame;
		524
518	{	525	{
519	dSP;	526	dSP;
520	I32 cxix = cxstack_ix;	527	I32 cxix = cxstack_ix;
521	PERL_CONTEXT *ccstk = cxstack;	528	PERL_CONTEXT *ccstk = cxstack;
522	PERL_SI *top_si = PL_curstackinfo;	529	PERL_SI *top_si = PL_curstackinfo;
…		…
589	#undef VAR	596	#undef VAR
590	}	597	}
591	}	598	}
592		599
593	/*	600	/*
594	* allocate various perl stacks. This is an exact copy	601	* allocate various perl stacks. This is almost an exact copy
595	* of perl.c:init_stacks, except that it uses less memory	602	* of perl.c:init_stacks, except that it uses less memory
596	* on the (sometimes correct) assumption that coroutines do	603	* on the (sometimes correct) assumption that coroutines do
597	* not usually need a lot of stackspace.	604	* not usually need a lot of stackspace.
598	*/	605	*/
599	#if CORO_PREFER_PERL_FUNCTIONS	606	#if CORO_PREFER_PERL_FUNCTIONS
…		…
801		808
802	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	809	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
803	}	810	}
804		811
805	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 */
806	coro_setup (pTHX_ struct coro *coro)	828	coro_setup (pTHX_ struct coro *coro)
807	{	829	{
808	/*	830	/*
809	* emulate part of the perl startup here.	831	* emulate part of the perl startup here.
810	*/	832	*/
…		…
834	PL_rs = newSVsv (GvSV (irsgv));	856	PL_rs = newSVsv (GvSV (irsgv));
835	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	857	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
836		858
837	{	859	{
838	dSP;	860	dSP;
839	LOGOP myop;	861	UNOP myop;
840		862
841	Zero (&myop, 1, LOGOP);	863	Zero (&myop, 1, UNOP);
842	myop.op_next = Nullop;	864	myop.op_next = Nullop;
843	myop.op_flags = OPf_WANT_VOID;	865	myop.op_flags = OPf_WANT_VOID;
844		866
845	PUSHMARK (SP);	867	PUSHMARK (SP);
846	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	868	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
847	PUTBACK;	869	PUTBACK;
…		…
849	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	871	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
850	SPAGAIN;	872	SPAGAIN;
851	}	873	}
852		874
853	/* 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
854	* likely was suspended in set_stacklevel, called from entersub.	876	* 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	*/	877	*/
858	ENTER;	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;
859	}	891	}
860		892
861	static void	893	static void
862	coro_destruct (pTHX_ struct coro *coro)	894	coro_destruct (pTHX_ struct coro *coro)
863	{	895	{
…		…
887		919
888	SvREFCNT_dec (PL_diehook);	920	SvREFCNT_dec (PL_diehook);
889	SvREFCNT_dec (PL_warnhook);	921	SvREFCNT_dec (PL_warnhook);
890		922
891	SvREFCNT_dec (coro->saved_deffh);	923	SvREFCNT_dec (coro->saved_deffh);
892	SvREFCNT_dec (coro->throw);	924	SvREFCNT_dec (CORO_THROW);
893		925
894	coro_destruct_stacks (aTHX);	926	coro_destruct_stacks (aTHX);
895	}	927	}
896		928
897	static void	929	INLINE void
898	free_coro_mortal (pTHX)	930	free_coro_mortal (pTHX)
899	{	931	{
900	if (expect_true (coro_mortal))	932	if (expect_true (coro_mortal))
901	{	933	{
902	SvREFCNT_dec (coro_mortal);	934	SvREFCNT_dec (coro_mortal);
…		…
907	static int	939	static int
908	runops_trace (pTHX)	940	runops_trace (pTHX)
909	{	941	{
910	COP *oldcop = 0;	942	COP *oldcop = 0;
911	int oldcxix = -2;	943	int oldcxix = -2;
912	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 */
913	coro_cctx *cctx = coro->cctx;	945	coro_cctx *cctx = coro->cctx;
914		946
915	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	947	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
916	{	948	{
917	PERL_ASYNC_CHECK ();	949	PERL_ASYNC_CHECK ();
…		…
1026		1058
1027	TAINT_NOT;	1059	TAINT_NOT;
1028	return 0;	1060	return 0;
1029	}	1061	}
1030		1062
1031	/* inject a fake call to Coro::State::_cctx_init into the execution */	1063	static struct coro_cctx *cctx_ssl_cctx;
1032	/* _cctx_init should be careful, as it could be called at almost any time */	1064	static struct CoroSLF cctx_ssl_frame;
1033	/* during execution of a perl program */	1065
		1066	static void
		1067	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1068	{
		1069	ta->prev = (struct coro *)cctx_ssl_cctx;
		1070	ta->next = 0;
		1071	}
		1072
		1073	static int
		1074	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
		1075	{
		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 */
1034	static void NOINLINE	1082	static void NOINLINE
1035	cctx_prepare (pTHX_ coro_cctx *cctx)	1083	cctx_prepare (pTHX_ coro_cctx *cctx)
1036	{	1084	{
1037	dSP;
1038	LOGOP myop;
1039
1040	PL_top_env = &PL_start_env;	1085	PL_top_env = &PL_start_env;
1041		1086
1042	if (cctx->flags & CC_TRACE)	1087	if (cctx->flags & CC_TRACE)
1043	PL_runops = runops_trace;	1088	PL_runops = runops_trace;
1044		1089
1045	Zero (&myop, 1, LOGOP);	1090	/* we already must be executing an SLF op, there is no other valid way
1046	myop.op_next = PL_op;	1091	* that can lead to creation of a new cctx */
1047	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));
1048		1094
1049	PUSHMARK (SP);	1095	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1050	EXTEND (SP, 2);	1096	cctx_ssl_cctx = cctx;
1051	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1097	cctx_ssl_frame = slf_frame;
1052	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1098
1053	PUTBACK;	1099	slf_frame.prepare = slf_prepare_set_stacklevel;
1054	PL_op = (OP *)&myop;	1100	slf_frame.check = slf_check_set_stacklevel;
1055	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1101	}
1056	SPAGAIN;	1102
		1103	/* the tail of transfer: execute stuff we can only do after a transfer */
		1104	INLINE void
		1105	transfer_tail (pTHX)
		1106	{
		1107	free_coro_mortal (aTHX);
1057	}	1108	}
1058		1109
1059	/*	1110	/*
1060	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1061	*/	1112	*/
…		…
1068	# endif	1119	# endif
1069	#endif	1120	#endif
1070	{	1121	{
1071	dTHX;	1122	dTHX;
1072		1123
1073	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1124	/* normally we would need to skip the entersub here */
1074	UNLOCK;	1125	/* 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;	1126	/* PL_nop = PL_nop->op_next */
1078		1127
1079	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1080	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1130
		1131	/* cctx_run is the alternative tail of transfer() */
		1132	transfer_tail (aTHX);
1081		1133
1082	/* somebody or something will hit me for both perl_run and PL_restartop */	1134	/* somebody or something will hit me for both perl_run and PL_restartop */
1083	PL_restartop = PL_op;	1135	PL_restartop = PL_op;
1084	perl_run (PL_curinterp);	1136	perl_run (PL_curinterp);
1085		1137
…		…
1097		1149
1098	static coro_cctx *	1150	static coro_cctx *
1099	cctx_new ()	1151	cctx_new ()
1100	{	1152	{
1101	coro_cctx *cctx;	1153	coro_cctx *cctx;
		1154
		1155	++cctx_count;
		1156	New (0, cctx, 1, coro_cctx);
		1157
		1158	cctx->gen = cctx_gen;
		1159	cctx->flags = 0;
		1160	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1161
		1162	return cctx;
		1163	}
		1164
		1165	/* create a new cctx only suitable as source */
		1166	static coro_cctx *
		1167	cctx_new_empty ()
		1168	{
		1169	coro_cctx *cctx = cctx_new ();
		1170
		1171	cctx->sptr = 0;
		1172	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1173
		1174	return cctx;
		1175	}
		1176
		1177	/* create a new cctx suitable as destination/running a perl interpreter */
		1178	static coro_cctx *
		1179	cctx_new_run ()
		1180	{
		1181	coro_cctx *cctx = cctx_new ();
1102	void *stack_start;	1182	void *stack_start;
1103	size_t stack_size;	1183	size_t stack_size;
1104
1105	++cctx_count;
1106	Newz (0, cctx, 1, coro_cctx);
1107
1108	cctx->gen = cctx_gen;
1109		1184
1110	#if HAVE_MMAP	1185	#if HAVE_MMAP
1111	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1186	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1112	/* mmap supposedly does allocate-on-write for us */	1187	/* 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);	1188	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1114		1189
1115	if (cctx->sptr != (void *)-1)	1190	if (cctx->sptr != (void *)-1)
1116	{	1191	{
1117	# if CORO_STACKGUARD	1192	#if CORO_STACKGUARD
1118	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1193	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1119	# endif	1194	#endif
1120	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1195	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1121	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1196	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1122	cctx->flags |= CC_MAPPED;	1197	cctx->flags |= CC_MAPPED;
1123	}	1198	}
1124	else	1199	else
1125	#endif	1200	#endif
1126	{	1201	{
1127	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1202	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1128	New (0, cctx->sptr, cctx_stacksize, long);	1203	New (0, cctx->sptr, cctx_stacksize, long);
1129		1204
1130	if (!cctx->sptr)	1205	if (!cctx->sptr)
1131	{	1206	{
1132	perror ("FATAL: unable to allocate stack for coroutine");	1207	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1133	_exit (EXIT_FAILURE);	1208	_exit (EXIT_FAILURE);
1134	}	1209	}
1135		1210
1136	stack_start = cctx->sptr;	1211	stack_start = cctx->sptr;
1137	stack_size = cctx->ssize;	1212	stack_size = cctx->ssize;
1138	}	1213	}
1139		1214
1140	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1215	#if CORO_USE_VALGRIND
		1216	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
		1217	#endif
		1218
1141	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1219	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1142		1220
1143	return cctx;	1221	return cctx;
1144	}	1222	}
1145		1223
…		…
1153	coro_destroy (&cctx->cctx);	1231	coro_destroy (&cctx->cctx);
1154		1232
1155	/* coro_transfer creates new, empty cctx's */	1233	/* coro_transfer creates new, empty cctx's */
1156	if (cctx->sptr)	1234	if (cctx->sptr)
1157	{	1235	{
1158	#if CORO_USE_VALGRIND	1236	#if CORO_USE_VALGRIND
1159	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1237	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1160	#endif	1238	#endif
1161		1239
1162	#if HAVE_MMAP	1240	#if HAVE_MMAP
1163	if (cctx->flags & CC_MAPPED)	1241	if (cctx->flags & CC_MAPPED)
1164	munmap (cctx->sptr, cctx->ssize);	1242	munmap (cctx->sptr, cctx->ssize);
1165	else	1243	else
…		…
1186	return cctx;	1264	return cctx;
1187		1265
1188	cctx_destroy (cctx);	1266	cctx_destroy (cctx);
1189	}	1267	}
1190		1268
1191	return cctx_new ();	1269	return cctx_new_run ();
1192	}	1270	}
1193		1271
1194	static void	1272	static void
1195	cctx_put (coro_cctx *cctx)	1273	cctx_put (coro_cctx *cctx)
1196	{	1274	{
1197	assert (("cctx_put called on non-initialised cctx", cctx->sptr));	1275	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1198		1276
1199	/* free another cctx if overlimit */	1277	/* free another cctx if overlimit */
1200	if (expect_false (cctx_idle >= cctx_max_idle))	1278	if (expect_false (cctx_idle >= cctx_max_idle))
1201	{	1279	{
1202	coro_cctx *first = cctx_first;	1280	coro_cctx *first = cctx_first;
…		…
1214	/** coroutine switching *****************************************************/	1292	/** coroutine switching *****************************************************/
1215		1293
1216	static void	1294	static void
1217	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1295	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1218	{	1296	{
		1297	/* TODO: throwing up here is considered harmful */
		1298
1219	if (expect_true (prev != next))	1299	if (expect_true (prev != next))
1220	{	1300	{
1221	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1301	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");	1302	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1223		1303
1224	if (expect_false (next->flags & CF_RUNNING))	1304	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");	1305	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1226		1306
1227	if (expect_false (next->flags & CF_DESTROYED))	1307	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");	1308	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1229		1309
1230	#if !PERL_VERSION_ATLEAST (5,10,0)	1310	#if !PERL_VERSION_ATLEAST (5,10,0)
1231	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1311	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");	1312	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1233	#endif	1313	#endif
1234	}	1314	}
1235	}	1315	}
1236		1316
1237	/* always use the TRANSFER macro */	1317	/* always use the TRANSFER macro */
1238	static void NOINLINE	1318	static void NOINLINE /* noinline so we have a fixed stackframe */
1239	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1319	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1240	{	1320	{
1241	dSTACKLEVEL;	1321	dSTACKLEVEL;
1242		1322
1243	/* sometimes transfer is only called to set idle_sp */	1323	/* sometimes transfer is only called to set idle_sp */
…		…
1246	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1326	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1247	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1327	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1248	}	1328	}
1249	else if (expect_true (prev != next))	1329	else if (expect_true (prev != next))
1250	{	1330	{
1251	static volatile int has_throw;
1252	coro_cctx *prev__cctx;	1331	coro_cctx *prev__cctx;
1253		1332
1254	if (expect_false (prev->flags & CF_NEW))	1333	if (expect_false (prev->flags & CF_NEW))
1255	{	1334	{
1256	/* create a new empty/source context */	1335	/* create a new empty/source context */
1257	++cctx_count;	1336	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;	1337	prev->flags &= ~CF_NEW;
1263	prev->flags |= CF_RUNNING;	1338	prev->flags |= CF_RUNNING;
1264	}	1339	}
1265		1340
1266	prev->flags &= ~CF_RUNNING;	1341	prev->flags &= ~CF_RUNNING;
1267	next->flags |= CF_RUNNING;	1342	next->flags |= CF_RUNNING;
1268
1269	LOCK;
1270		1343
1271	/* first get rid of the old state */	1344	/* first get rid of the old state */
1272	save_perl (aTHX_ prev);	1345	save_perl (aTHX_ prev);
1273		1346
1274	if (expect_false (next->flags & CF_NEW))	1347	if (expect_false (next->flags & CF_NEW))
…		…
1281	else	1354	else
1282	load_perl (aTHX_ next);	1355	load_perl (aTHX_ next);
1283		1356
1284	prev__cctx = prev->cctx;	1357	prev__cctx = prev->cctx;
1285		1358
1286	/* possibly "free" the cctx */	1359	/* possibly untie and reuse the cctx */
1287	if (expect_true (	1360	if (expect_true (
1288	prev__cctx->idle_sp == STACKLEVEL	1361	prev__cctx->idle_sp == STACKLEVEL
1289	&& !(prev__cctx->flags & CC_TRACE)	1362	&& !(prev__cctx->flags & CC_TRACE)
1290	&& !force_cctx	1363	&& !force_cctx
1291	))	1364	))
1292	{	1365	{
1293	/* 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 */
1294	assert (("ERROR: current top_env must equal previous top_env", 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));
1295		1368
1296	prev->cctx = 0;	1369	prev->cctx = 0;
1297		1370
1298	/* 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 */
1299	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1372	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1306		1379
1307	++next->usecount;	1380	++next->usecount;
1308		1381
1309	if (expect_true (!next->cctx))	1382	if (expect_true (!next->cctx))
1310	next->cctx = cctx_get (aTHX);	1383	next->cctx = cctx_get (aTHX);
1311
1312	has_throw = !!next->throw;
1313		1384
1314	if (expect_false (prev__cctx != next->cctx))	1385	if (expect_false (prev__cctx != next->cctx))
1315	{	1386	{
1316	prev__cctx->top_env = PL_top_env;	1387	prev__cctx->top_env = PL_top_env;
1317	PL_top_env = next->cctx->top_env;	1388	PL_top_env = next->cctx->top_env;
1318	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1389	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1319	}	1390	}
1320		1391
1321	free_coro_mortal (aTHX);	1392	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	}	1393	}
1337	}	1394	}
1338
1339	struct transfer_args
1340	{
1341	struct coro *prev, *next;
1342	};
1343		1395
1344	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1396	#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)	1397	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1346		1398
1347	/** high level stuff ********************************************************/	1399	/** high level stuff ********************************************************/
…		…
1349	static int	1401	static int
1350	coro_state_destroy (pTHX_ struct coro *coro)	1402	coro_state_destroy (pTHX_ struct coro *coro)
1351	{	1403	{
1352	if (coro->flags & CF_DESTROYED)	1404	if (coro->flags & CF_DESTROYED)
1353	return 0;	1405	return 0;
		1406
		1407	if (coro->on_destroy)
		1408	coro->on_destroy (aTHX_ coro);
1354		1409
1355	coro->flags |= CF_DESTROYED;	1410	coro->flags |= CF_DESTROYED;
1356		1411
1357	if (coro->flags & CF_READY)	1412	if (coro->flags & CF_READY)
1358	{	1413	{
1359	/* reduce nready, as destroying a ready coro effectively unreadies it */	1414	/* reduce nready, as destroying a ready coro effectively unreadies it */
1360	/* alternative: look through all ready queues and remove the coro */	1415	/* alternative: look through all ready queues and remove the coro */
1361	LOCK;
1362	--coro_nready;	1416	--coro_nready;
1363	UNLOCK;
1364	}	1417	}
1365	else	1418	else
1366	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 */
1367		1420
1368	if (coro->mainstack && coro->mainstack != main_mainstack)	1421	if (coro->mainstack && coro->mainstack != main_mainstack)
1369	{	1422	{
1370	struct coro temp;	1423	struct coro temp;
1371		1424
1372	if (coro->flags & CF_RUNNING)	1425	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1373	croak ("FATAL: tried to destroy currently running coroutine");
1374		1426
1375	save_perl (aTHX_ &temp);	1427	save_perl (aTHX_ &temp);
1376	load_perl (aTHX_ coro);	1428	load_perl (aTHX_ coro);
1377		1429
1378	coro_destruct (aTHX_ coro);	1430	coro_destruct (aTHX_ coro);
…		…
1429	# define MGf_DUP 0	1481	# define MGf_DUP 0
1430	#endif	1482	#endif
1431	};	1483	};
1432		1484
1433	static void	1485	static void
1434	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)
1435	{	1487	{
1436	ta->prev = SvSTATE (prev_sv);	1488	ta->prev = SvSTATE (prev_sv);
1437	ta->next = SvSTATE (next_sv);	1489	ta->next = SvSTATE (next_sv);
1438	TRANSFER_CHECK (*ta);	1490	TRANSFER_CHECK (*ta);
1439	}	1491	}
1440		1492
1441	static void	1493	static void
1442	api_transfer (SV *prev_sv, SV *next_sv)	1494	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1443	{	1495	{
1444	dTHX;
1445	struct transfer_args ta;	1496	struct coro_transfer_args ta;
1446		1497
1447	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1498	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1448	TRANSFER (ta, 1);	1499	TRANSFER (ta, 1);
1449	}	1500	}
1450		1501
1451	/** Coro ********************************************************************/	1502	/** Coro ********************************************************************/
1452		1503
1453	static void	1504	INLINE void
1454	coro_enq (pTHX_ SV *coro_sv)	1505	coro_enq (pTHX_ struct coro *coro)
1455	{	1506	{
1456	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));
1457	}	1508	}
1458		1509
1459	static SV *	1510	INLINE SV *
1460	coro_deq (pTHX)	1511	coro_deq (pTHX)
1461	{	1512	{
1462	int prio;	1513	int prio;
1463		1514
1464	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1515	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1467		1518
1468	return 0;	1519	return 0;
1469	}	1520	}
1470		1521
1471	static int	1522	static int
1472	api_ready (SV *coro_sv)	1523	api_ready (pTHX_ SV *coro_sv)
1473	{	1524	{
1474	dTHX;
1475	struct coro *coro;	1525	struct coro *coro;
1476	SV *sv_hook;	1526	SV *sv_hook;
1477	void (*xs_hook)(void);	1527	void (*xs_hook)(void);
1478		1528
1479	if (SvROK (coro_sv))	1529	if (SvROK (coro_sv))
…		…
1484	if (coro->flags & CF_READY)	1534	if (coro->flags & CF_READY)
1485	return 0;	1535	return 0;
1486		1536
1487	coro->flags |= CF_READY;	1537	coro->flags |= CF_READY;
1488		1538
1489	LOCK;
1490
1491	sv_hook = coro_nready ? 0 : coro_readyhook;	1539	sv_hook = coro_nready ? 0 : coro_readyhook;
1492	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1540	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1493		1541
1494	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1542	coro_enq (aTHX_ coro);
1495	++coro_nready;	1543	++coro_nready;
1496		1544
1497	UNLOCK;
1498
1499	if (sv_hook)	1545	if (sv_hook)
1500	{	1546	{
1501	dSP;	1547	dSP;
1502		1548
1503	ENTER;	1549	ENTER;
1504	SAVETMPS;	1550	SAVETMPS;
1505		1551
1506	PUSHMARK (SP);	1552	PUSHMARK (SP);
1507	PUTBACK;	1553	PUTBACK;
1508	call_sv (sv_hook, G_DISCARD);	1554	call_sv (sv_hook, G_VOID | G_DISCARD);
1509	SPAGAIN;
1510		1555
1511	FREETMPS;	1556	FREETMPS;
1512	LEAVE;	1557	LEAVE;
1513	}	1558	}
1514		1559
…		…
1517		1562
1518	return 1;	1563	return 1;
1519	}	1564	}
1520		1565
1521	static int	1566	static int
1522	api_is_ready (SV *coro_sv)	1567	api_is_ready (pTHX_ SV *coro_sv)
1523	{	1568	{
1524	dTHX;
1525	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1569	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1526	}	1570	}
1527		1571
1528	static void	1572	INLINE void
1529	prepare_schedule (pTHX_ struct transfer_args *ta)	1573	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1530	{	1574	{
1531	SV *prev_sv, *next_sv;	1575	SV *prev_sv, *next_sv;
1532		1576
1533	for (;;)	1577	for (;;)
1534	{	1578	{
1535	LOCK;
1536	next_sv = coro_deq (aTHX);	1579	next_sv = coro_deq (aTHX);
1537		1580
1538	/* nothing to schedule: call the idle handler */	1581	/* nothing to schedule: call the idle handler */
1539	if (expect_false (!next_sv))	1582	if (expect_false (!next_sv))
1540	{	1583	{
1541	dSP;	1584	dSP;
1542	UNLOCK;
1543		1585
1544	ENTER;	1586	ENTER;
1545	SAVETMPS;	1587	SAVETMPS;
1546		1588
1547	PUSHMARK (SP);	1589	PUSHMARK (SP);
1548	PUTBACK;	1590	PUTBACK;
1549	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1591	call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1550	SPAGAIN;
1551		1592
1552	FREETMPS;	1593	FREETMPS;
1553	LEAVE;	1594	LEAVE;
1554	continue;	1595	continue;
1555	}	1596	}
1556		1597
1557	ta->next = SvSTATE (next_sv);	1598	ta->next = SvSTATE_hv (next_sv);
1558		1599
1559	/* cannot transfer to destroyed coros, skip and look for next */	1600	/* cannot transfer to destroyed coros, skip and look for next */
1560	if (expect_false (ta->next->flags & CF_DESTROYED))	1601	if (expect_false (ta->next->flags & CF_DESTROYED))
1561	{	1602	{
1562	UNLOCK;
1563	SvREFCNT_dec (next_sv);	1603	SvREFCNT_dec (next_sv);
1564	/* coro_nready is already taken care of by destroy */	1604	/* coro_nready has already been taken care of by destroy */
1565	continue;	1605	continue;
1566	}	1606	}
1567		1607
1568	--coro_nready;	1608	--coro_nready;
1569	UNLOCK;
1570	break;	1609	break;
1571	}	1610	}
1572		1611
1573	/* free this only after the transfer */	1612	/* free this only after the transfer */
1574	prev_sv = SvRV (coro_current);	1613	prev_sv = SvRV (coro_current);
1575	ta->prev = SvSTATE (prev_sv);	1614	ta->prev = SvSTATE_hv (prev_sv);
1576	TRANSFER_CHECK (*ta);	1615	TRANSFER_CHECK (*ta);
1577	assert (ta->next->flags & CF_READY);	1616	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1578	ta->next->flags &= ~CF_READY;	1617	ta->next->flags &= ~CF_READY;
1579	SvRV_set (coro_current, next_sv);	1618	SvRV_set (coro_current, next_sv);
1580		1619
1581	LOCK;
1582	free_coro_mortal (aTHX);	1620	free_coro_mortal (aTHX);
1583	coro_mortal = prev_sv;	1621	coro_mortal = prev_sv;
1584	UNLOCK;
1585	}	1622	}
1586		1623
1587	static void	1624	INLINE void
1588	prepare_cede (pTHX_ struct transfer_args *ta)	1625	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1589	{	1626	{
1590	api_ready (coro_current);	1627	api_ready (aTHX_ coro_current);
1591	prepare_schedule (aTHX_ ta);	1628	prepare_schedule (aTHX_ ta);
1592	}	1629	}
1593		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
1594	static int	1654	static int
1595	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1655	api_cede (pTHX)
1596	{	1656	{
1597	if (coro_nready)	1657	struct coro_transfer_args ta;
1598	{	1658
1599	SV *prev = SvRV (coro_current);
1600	prepare_schedule (aTHX_ ta);	1659	prepare_cede (aTHX_ &ta);
1601	api_ready (prev);	1660
		1661	if (expect_true (ta.prev != ta.next))
		1662	{
		1663	TRANSFER (ta, 1);
1602	return 1;	1664	return 1;
1603	}	1665	}
1604	else	1666	else
1605	return 0;	1667	return 0;
1606	}	1668	}
1607		1669
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	1670	static int
1619	api_cede (void)	1671	api_cede_notself (pTHX)
1620	{	1672	{
1621	dTHX;	1673	if (coro_nready)
		1674	{
1622	struct transfer_args ta;	1675	struct coro_transfer_args ta;
1623		1676
1624	prepare_cede (aTHX_ &ta);	1677	prepare_cede_notself (aTHX_ &ta);
1625
1626	if (expect_true (ta.prev != ta.next))
1627	{
1628	TRANSFER (ta, 1);	1678	TRANSFER (ta, 1);
1629	return 1;	1679	return 1;
1630	}	1680	}
1631	else	1681	else
1632	return 0;	1682	return 0;
1633	}	1683	}
1634		1684
1635	static int	1685	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)	1686	api_trace (pTHX_ SV *coro_sv, int flags)
1652	{	1687	{
1653	dTHX;
1654	struct coro *coro = SvSTATE (coro_sv);	1688	struct coro *coro = SvSTATE (coro_sv);
1655		1689
1656	if (flags & CC_TRACE)	1690	if (flags & CC_TRACE)
1657	{	1691	{
1658	if (!coro->cctx)	1692	if (!coro->cctx)
1659	coro->cctx = cctx_new ();	1693	coro->cctx = cctx_new_run ();
1660	else if (!(coro->cctx->flags & CC_TRACE))	1694	else if (!(coro->cctx->flags & CC_TRACE))
1661	croak ("cannot enable tracing on coroutine with custom stack");	1695	croak ("cannot enable tracing on coroutine with custom stack,");
1662		1696
1663	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1697	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1664	}	1698	}
1665	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1699	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1666	{	1700	{
…		…
1671	else	1705	else
1672	coro->slot->runops = RUNOPS_DEFAULT;	1706	coro->slot->runops = RUNOPS_DEFAULT;
1673	}	1707	}
1674	}	1708	}
1675		1709
1676	#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
1677	static int	1740	static void
1678	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1741	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1679	{	1742	{
1680	AV *padlist;	1743	SV **arg = (SV **)slf_frame.data;
1681	AV *av = (AV *)mg->mg_obj;
1682		1744
1683	abort ();	1745	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1684
1685	return 0;
1686	}	1746	}
1687		1747
1688	static MGVTBL coro_gensub_vtbl = {	1748	static void
1689	0, 0, 0, 0,	1749	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1690	coro_gensub_free	1750	{
1691	};	1751	if (items != 2)
1692	#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	}
1693		1923
1694	/*****************************************************************************/	1924	/*****************************************************************************/
1695	/* PerlIO::cede */	1925	/* PerlIO::cede */
1696		1926
1697	typedef struct	1927	typedef struct
…		…
1725	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1955	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726	double now = nvtime ();	1956	double now = nvtime ();
1727		1957
1728	if (now >= self->next)	1958	if (now >= self->next)
1729	{	1959	{
1730	api_cede ();	1960	api_cede (aTHX);
1731	self->next = now + self->every;	1961	self->next = now + self->every;
1732	}	1962	}
1733		1963
1734	return PerlIOBuf_flush (aTHX_ f);	1964	return PerlIOBuf_flush (aTHX_ f);
1735	}	1965	}
…		…
1764	PerlIOBuf_get_ptr,	1994	PerlIOBuf_get_ptr,
1765	PerlIOBuf_get_cnt,	1995	PerlIOBuf_get_cnt,
1766	PerlIOBuf_set_ptrcnt,	1996	PerlIOBuf_set_ptrcnt,
1767	};	1997	};
1768		1998
		1999	/*****************************************************************************/
		2000	/* Coro::Semaphore */
		2001
		2002	static void
		2003	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2004	{
		2005	SV *count_sv = AvARRAY (av)[0];
		2006	IV count = SvIVX (count_sv);
		2007
		2008	count += adjust;
		2009	SvIVX (count_sv) = count;
		2010
		2011	/* now wake up as many waiters as are expected to lock */
		2012	while (count > 0 && AvFILLp (av) > 0)
		2013	{
		2014	SV *cb;
		2015
		2016	/* swap first two elements so we can shift a waiter */
		2017	AvARRAY (av)[0] = AvARRAY (av)[1];
		2018	AvARRAY (av)[1] = count_sv;
		2019	cb = av_shift (av);
		2020
		2021	if (SvOBJECT (cb))
		2022	api_ready (aTHX_ cb);
		2023	else
		2024	croak ("callbacks not yet supported");
		2025
		2026	SvREFCNT_dec (cb);
		2027
		2028	--count;
		2029	}
		2030	}
		2031
		2032	static void
		2033	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2034	{
		2035	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2036	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2037	}
		2038
		2039	static int
		2040	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
		2041	{
		2042	AV *av = (AV *)frame->data;
		2043	SV *count_sv = AvARRAY (av)[0];
		2044
		2045	/* if we are about to throw, don't actually acquire the lock, just throw */
		2046	if (CORO_THROW)
		2047	return 0;
		2048	else if (SvIVX (count_sv) > 0)
		2049	{
		2050	SvSTATE_current->on_destroy = 0;
		2051
		2052	if (acquire)
		2053	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2054	else
		2055	coro_semaphore_adjust (aTHX_ av, 0);
		2056
		2057	return 0;
		2058	}
		2059	else
		2060	{
		2061	int i;
		2062	/* if we were woken up but can't down, we look through the whole */
		2063	/* waiters list and only add us if we aren't in there already */
		2064	/* this avoids some degenerate memory usage cases */
		2065
		2066	for (i = 1; i <= AvFILLp (av); ++i)
		2067	if (AvARRAY (av)[i] == SvRV (coro_current))
		2068	return 1;
		2069
		2070	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2071	return 1;
		2072	}
		2073	}
		2074
		2075	static int
		2076	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2077	{
		2078	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2079	}
		2080
		2081	static int
		2082	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2083	{
		2084	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2085	}
		2086
		2087	static void
		2088	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2089	{
		2090	AV *av = (AV *)SvRV (arg [0]);
		2091
		2092	if (SvIVX (AvARRAY (av)[0]) > 0)
		2093	{
		2094	frame->data = (void *)av;
		2095	frame->prepare = prepare_nop;
		2096	}
		2097	else
		2098	{
		2099	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2100
		2101	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2102	frame->prepare = prepare_schedule;
		2103
		2104	/* to avoid race conditions when a woken-up coro gets terminated */
		2105	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2106	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2107	}
		2108	}
		2109
		2110	static void
		2111	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2112	{
		2113	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2114	frame->check = slf_check_semaphore_down;
		2115	}
		2116
		2117	static void
		2118	slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2119	{
		2120	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2121	frame->check = slf_check_semaphore_wait;
		2122	}
		2123
		2124	/*****************************************************************************/
		2125	/* gensub: simple closure generation utility */
		2126
		2127	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2128
		2129	/* create a closure from XS, returns a code reference */
		2130	/* the arg can be accessed via GENSUB_ARG from the callback */
		2131	/* the callback must use dXSARGS/XSRETURN */
		2132	static SV *
		2133	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2134	{
		2135	CV *cv = (CV *)newSV (0);
		2136
		2137	sv_upgrade ((SV *)cv, SVt_PVCV);
		2138
		2139	CvANON_on (cv);
		2140	CvISXSUB_on (cv);
		2141	CvXSUB (cv) = xsub;
		2142	GENSUB_ARG = arg;
		2143
		2144	return newRV_noinc ((SV *)cv);
		2145	}
		2146
		2147	/*****************************************************************************/
		2148	/* Coro::AIO */
		2149
		2150	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2151
		2152	/* helper storage struct */
		2153	struct io_state
		2154	{
		2155	int errorno;
		2156	I32 laststype; /* U16 in 5.10.0 */
		2157	int laststatval;
		2158	Stat_t statcache;
		2159	};
		2160
		2161	static void
		2162	coro_aio_callback (pTHX_ CV *cv)
		2163	{
		2164	dXSARGS;
		2165	AV *state = (AV *)GENSUB_ARG;
		2166	SV *coro = av_pop (state);
		2167	SV *data_sv = newSV (sizeof (struct io_state));
		2168
		2169	av_extend (state, items);
		2170
		2171	sv_upgrade (data_sv, SVt_PV);
		2172	SvCUR_set (data_sv, sizeof (struct io_state));
		2173	SvPOK_only (data_sv);
		2174
		2175	{
		2176	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2177
		2178	data->errorno = errno;
		2179	data->laststype = PL_laststype;
		2180	data->laststatval = PL_laststatval;
		2181	data->statcache = PL_statcache;
		2182	}
		2183
		2184	/* now build the result vector out of all the parameters and the data_sv */
		2185	{
		2186	int i;
		2187
		2188	for (i = 0; i < items; ++i)
		2189	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2190	}
		2191
		2192	av_push (state, data_sv);
		2193
		2194	api_ready (aTHX_ coro);
		2195	SvREFCNT_dec (coro);
		2196	SvREFCNT_dec ((AV *)state);
		2197	}
		2198
		2199	static int
		2200	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2201	{
		2202	AV *state = (AV *)frame->data;
		2203
		2204	/* if we are about to throw, return early */
		2205	/* this does not cancel the aio request, but at least */
		2206	/* it quickly returns */
		2207	if (CORO_THROW)
		2208	return 0;
		2209
		2210	/* one element that is an RV? repeat! */
		2211	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2212	return 1;
		2213
		2214	/* restore status */
		2215	{
		2216	SV *data_sv = av_pop (state);
		2217	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2218
		2219	errno = data->errorno;
		2220	PL_laststype = data->laststype;
		2221	PL_laststatval = data->laststatval;
		2222	PL_statcache = data->statcache;
		2223
		2224	SvREFCNT_dec (data_sv);
		2225	}
		2226
		2227	/* push result values */
		2228	{
		2229	dSP;
		2230	int i;
		2231
		2232	EXTEND (SP, AvFILLp (state) + 1);
		2233	for (i = 0; i <= AvFILLp (state); ++i)
		2234	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2235
		2236	PUTBACK;
		2237	}
		2238
		2239	return 0;
		2240	}
		2241
		2242	static void
		2243	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2244	{
		2245	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2246	SV *coro_hv = SvRV (coro_current);
		2247	struct coro *coro = SvSTATE_hv (coro_hv);
		2248
		2249	/* put our coroutine id on the state arg */
		2250	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2251
		2252	/* first see whether we have a non-zero priority and set it as AIO prio */
		2253	if (coro->prio)
		2254	{
		2255	dSP;
		2256
		2257	static SV *prio_cv;
		2258	static SV *prio_sv;
		2259
		2260	if (expect_false (!prio_cv))
		2261	{
		2262	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2263	prio_sv = newSViv (0);
		2264	}
		2265
		2266	PUSHMARK (SP);
		2267	sv_setiv (prio_sv, coro->prio);
		2268	XPUSHs (prio_sv);
		2269
		2270	PUTBACK;
		2271	call_sv (prio_cv, G_VOID | G_DISCARD);
		2272	}
		2273
		2274	/* now call the original request */
		2275	{
		2276	dSP;
		2277	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2278	int i;
		2279
		2280	PUSHMARK (SP);
		2281
		2282	/* first push all args to the stack */
		2283	EXTEND (SP, items + 1);
		2284
		2285	for (i = 0; i < items; ++i)
		2286	PUSHs (arg [i]);
		2287
		2288	/* now push the callback closure */
		2289	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
		2290
		2291	/* now call the AIO function - we assume our request is uncancelable */
		2292	PUTBACK;
		2293	call_sv ((SV *)req, G_VOID | G_DISCARD);
		2294	}
		2295
		2296	/* now that the requets is going, we loop toll we have a result */
		2297	frame->data = (void *)state;
		2298	frame->prepare = prepare_schedule;
		2299	frame->check = slf_check_aio_req;
		2300	}
		2301
		2302	static void
		2303	coro_aio_req_xs (pTHX_ CV *cv)
		2304	{
		2305	dXSARGS;
		2306
		2307	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2308
		2309	XSRETURN_EMPTY;
		2310	}
		2311
		2312	/*****************************************************************************/
1769		2313
1770	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2314	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1771		2315
1772	PROTOTYPES: DISABLE	2316	PROTOTYPES: DISABLE
1773		2317
1774	BOOT:	2318	BOOT:
1775	{	2319	{
1776	#ifdef USE_ITHREADS	2320	#ifdef USE_ITHREADS
1777	MUTEX_INIT (&coro_lock);
1778	# if CORO_PTHREAD	2321	# if CORO_PTHREAD
1779	coro_thx = PERL_GET_CONTEXT;	2322	coro_thx = PERL_GET_CONTEXT;
1780	# endif	2323	# endif
1781	#endif	2324	#endif
1782	BOOT_PAGESIZE;	2325	BOOT_PAGESIZE;
…		…
1803	main_top_env = PL_top_env;	2346	main_top_env = PL_top_env;
1804		2347
1805	while (main_top_env->je_prev)	2348	while (main_top_env->je_prev)
1806	main_top_env = main_top_env->je_prev;	2349	main_top_env = main_top_env->je_prev;
1807		2350
		2351	{
		2352	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2353
		2354	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2355	hv_store_ent (PL_custom_op_names, slf,
		2356	newSVpv ("coro_slf", 0), 0);
		2357
		2358	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2359	hv_store_ent (PL_custom_op_descs, slf,
		2360	newSVpv ("coro schedule like function", 0), 0);
		2361	}
		2362
1808	coroapi.ver = CORO_API_VERSION;	2363	coroapi.ver = CORO_API_VERSION;
1809	coroapi.rev = CORO_API_REVISION;	2364	coroapi.rev = CORO_API_REVISION;
		2365
1810	coroapi.transfer = api_transfer;	2366	coroapi.transfer = api_transfer;
		2367
		2368	coroapi.sv_state = SvSTATE_;
		2369	coroapi.execute_slf = api_execute_slf;
		2370	coroapi.prepare_nop = prepare_nop;
		2371	coroapi.prepare_schedule = prepare_schedule;
		2372	coroapi.prepare_cede = prepare_cede;
		2373	coroapi.prepare_cede_notself = prepare_cede_notself;
1811		2374
1812	{	2375	{
1813	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2376	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1814		2377
1815	if (!svp) croak ("Time::HiRes is required");	2378	if (!svp) croak ("Time::HiRes is required");
…		…
1848	av_push (coro->args, newSVsv (ST (i)));	2411	av_push (coro->args, newSVsv (ST (i)));
1849	}	2412	}
1850	OUTPUT:	2413	OUTPUT:
1851	RETVAL	2414	RETVAL
1852		2415
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	2416	void
1857	_set_stacklevel (...)	2417	transfer (...)
1858	ALIAS:	2418	PROTOTYPE: $$
1859	Coro::State::transfer = 1	2419	CODE:
1860	Coro::schedule = 2	2420	CORO_EXECUTE_SLF_XS (slf_init_transfer);
1861	Coro::cede = 3
1862	Coro::cede_notself = 4
1863	CODE:
1864	{
1865	struct transfer_args ta;
1866
1867	PUTBACK;
1868	switch (ix)
1869	{
1870	case 0:
1871	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
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		2421
1905	bool	2422	bool
1906	_destroy (SV *coro_sv)	2423	_destroy (SV *coro_sv)
1907	CODE:	2424	CODE:
1908	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2425	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1915	CODE:	2432	CODE:
1916	_exit (code);	2433	_exit (code);
1917		2434
1918	int	2435	int
1919	cctx_stacksize (int new_stacksize = 0)	2436	cctx_stacksize (int new_stacksize = 0)
		2437	PROTOTYPE: ;$
1920	CODE:	2438	CODE:
1921	RETVAL = cctx_stacksize;	2439	RETVAL = cctx_stacksize;
1922	if (new_stacksize)	2440	if (new_stacksize)
1923	{	2441	{
1924	cctx_stacksize = new_stacksize;	2442	cctx_stacksize = new_stacksize;
…		…
1927	OUTPUT:	2445	OUTPUT:
1928	RETVAL	2446	RETVAL
1929		2447
1930	int	2448	int
1931	cctx_max_idle (int max_idle = 0)	2449	cctx_max_idle (int max_idle = 0)
		2450	PROTOTYPE: ;$
1932	CODE:	2451	CODE:
1933	RETVAL = cctx_max_idle;	2452	RETVAL = cctx_max_idle;
1934	if (max_idle > 1)	2453	if (max_idle > 1)
1935	cctx_max_idle = max_idle;	2454	cctx_max_idle = max_idle;
1936	OUTPUT:	2455	OUTPUT:
1937	RETVAL	2456	RETVAL
1938		2457
1939	int	2458	int
1940	cctx_count ()	2459	cctx_count ()
		2460	PROTOTYPE:
1941	CODE:	2461	CODE:
1942	RETVAL = cctx_count;	2462	RETVAL = cctx_count;
1943	OUTPUT:	2463	OUTPUT:
1944	RETVAL	2464	RETVAL
1945		2465
1946	int	2466	int
1947	cctx_idle ()	2467	cctx_idle ()
		2468	PROTOTYPE:
1948	CODE:	2469	CODE:
1949	RETVAL = cctx_idle;	2470	RETVAL = cctx_idle;
1950	OUTPUT:	2471	OUTPUT:
1951	RETVAL	2472	RETVAL
1952		2473
1953	void	2474	void
1954	list ()	2475	list ()
		2476	PROTOTYPE:
1955	PPCODE:	2477	PPCODE:
1956	{	2478	{
1957	struct coro *coro;	2479	struct coro *coro;
1958	for (coro = coro_first; coro; coro = coro->next)	2480	for (coro = coro_first; coro; coro = coro->next)
1959	if (coro->hv)	2481	if (coro->hv)
…		…
2018	RETVAL = boolSV (coro->flags & ix);	2540	RETVAL = boolSV (coro->flags & ix);
2019	OUTPUT:	2541	OUTPUT:
2020	RETVAL	2542	RETVAL
2021		2543
2022	void	2544	void
		2545	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2546	PROTOTYPE: $;$
		2547	CODE:
		2548	{
		2549	struct coro *current = SvSTATE_current;
		2550	SV **throwp = self == current ? &CORO_THROW : &self->except;
		2551	SvREFCNT_dec (*throwp);
		2552	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2553	}
		2554
		2555	void
2023	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2556	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2557	PROTOTYPE: $;$
		2558	C_ARGS: aTHX_ coro, flags
2024		2559
2025	SV *	2560	SV *
2026	has_cctx (Coro::State coro)	2561	has_cctx (Coro::State coro)
2027	PROTOTYPE: $	2562	PROTOTYPE: $
2028	CODE:	2563	CODE:
…		…
2052	OUTPUT:	2587	OUTPUT:
2053	RETVAL	2588	RETVAL
2054		2589
2055	void	2590	void
2056	force_cctx ()	2591	force_cctx ()
		2592	PROTOTYPE:
2057	CODE:	2593	CODE:
2058	struct coro *coro = SvSTATE (coro_current);
2059	coro->cctx->idle_sp = 0;	2594	SvSTATE_current->cctx->idle_sp = 0;
2060		2595
2061	void	2596	void
2062	swap_defsv (Coro::State self)	2597	swap_defsv (Coro::State self)
2063	PROTOTYPE: $	2598	PROTOTYPE: $
2064	ALIAS:	2599	ALIAS:
2065	swap_defav = 1	2600	swap_defav = 1
2066	CODE:	2601	CODE:
2067	if (!self->slot)	2602	if (!self->slot)
2068	croak ("cannot swap state with coroutine that has no saved state");	2603	croak ("cannot swap state with coroutine that has no saved state,");
2069	else	2604	else
2070	{	2605	{
2071	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2606	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2072	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2607	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2073		2608
2074	SV *tmp = *src; *src = *dst; *dst = tmp;	2609	SV *tmp = *src; *src = *dst; *dst = tmp;
2075	}	2610	}
		2611
2076		2612
2077	MODULE = Coro::State PACKAGE = Coro	2613	MODULE = Coro::State PACKAGE = Coro
2078		2614
2079	BOOT:	2615	BOOT:
2080	{	2616	{
…		…
2098		2634
2099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2635	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2100	coro_ready[i] = newAV ();	2636	coro_ready[i] = newAV ();
2101		2637
2102	{	2638	{
2103	SV *sv = perl_get_sv ("Coro::API", TRUE);	2639	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2104	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2105		2640
2106	coroapi.schedule = api_schedule;	2641	coroapi.schedule = api_schedule;
2107	coroapi.cede = api_cede;	2642	coroapi.cede = api_cede;
2108	coroapi.cede_notself = api_cede_notself;	2643	coroapi.cede_notself = api_cede_notself;
2109	coroapi.ready = api_ready;	2644	coroapi.ready = api_ready;
2110	coroapi.is_ready = api_is_ready;	2645	coroapi.is_ready = api_is_ready;
2111	coroapi.nready = &coro_nready;	2646	coroapi.nready = coro_nready;
2112	coroapi.current = coro_current;	2647	coroapi.current = coro_current;
2113		2648
2114	GCoroAPI = &coroapi;	2649	/*GCoroAPI = &coroapi;*/
2115	sv_setiv (sv, (IV)&coroapi);	2650	sv_setiv (sv, (IV)&coroapi);
2116	SvREADONLY_on (sv);	2651	SvREADONLY_on (sv);
2117	}	2652	}
2118	}	2653	}
		2654
		2655	void
		2656	schedule (...)
		2657	CODE:
		2658	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2659
		2660	void
		2661	cede (...)
		2662	CODE:
		2663	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2664
		2665	void
		2666	cede_notself (...)
		2667	CODE:
		2668	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2119		2669
2120	void	2670	void
2121	_set_current (SV *current)	2671	_set_current (SV *current)
2122	PROTOTYPE: $	2672	PROTOTYPE: $
2123	CODE:	2673	CODE:
…		…
2126		2676
2127	void	2677	void
2128	_set_readyhook (SV *hook)	2678	_set_readyhook (SV *hook)
2129	PROTOTYPE: $	2679	PROTOTYPE: $
2130	CODE:	2680	CODE:
2131	LOCK;
2132	SvREFCNT_dec (coro_readyhook);	2681	SvREFCNT_dec (coro_readyhook);
2133	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2682	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2134	UNLOCK;
2135		2683
2136	int	2684	int
2137	prio (Coro::State coro, int newprio = 0)	2685	prio (Coro::State coro, int newprio = 0)
		2686	PROTOTYPE: $;$
2138	ALIAS:	2687	ALIAS:
2139	nice = 1	2688	nice = 1
2140	CODE:	2689	CODE:
2141	{	2690	{
2142	RETVAL = coro->prio;	2691	RETVAL = coro->prio;
…		…
2157		2706
2158	SV *	2707	SV *
2159	ready (SV *self)	2708	ready (SV *self)
2160	PROTOTYPE: $	2709	PROTOTYPE: $
2161	CODE:	2710	CODE:
2162	RETVAL = boolSV (api_ready (self));	2711	RETVAL = boolSV (api_ready (aTHX_ self));
2163	OUTPUT:	2712	OUTPUT:
2164	RETVAL	2713	RETVAL
2165		2714
2166	int	2715	int
2167	nready (...)	2716	nready (...)
…		…
2169	CODE:	2718	CODE:
2170	RETVAL = coro_nready;	2719	RETVAL = coro_nready;
2171	OUTPUT:	2720	OUTPUT:
2172	RETVAL	2721	RETVAL
2173		2722
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	2723	# for async_pool speedup
2182	void	2724	void
2183	_pool_1 (SV *cb)	2725	_pool_1 (SV *cb)
2184	CODE:	2726	CODE:
2185	{	2727	{
2186	struct coro *coro = SvSTATE (coro_current);
2187	HV *hv = (HV *)SvRV (coro_current);	2728	HV *hv = (HV *)SvRV (coro_current);
		2729	struct coro *coro = SvSTATE_hv ((SV *)hv);
2188	AV *defav = GvAV (PL_defgv);	2730	AV *defav = GvAV (PL_defgv);
2189	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2731	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2190	AV *invoke_av;	2732	AV *invoke_av;
2191	int i, len;	2733	int i, len;
2192		2734
…		…
2213	{	2755	{
2214	av_fill (defav, len - 1);	2756	av_fill (defav, len - 1);
2215	for (i = 0; i < len; ++i)	2757	for (i = 0; i < len; ++i)
2216	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2758	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2217	}	2759	}
2218
2219	SvREFCNT_dec (invoke);
2220	}	2760	}
2221		2761
2222	void	2762	void
2223	_pool_2 (SV *cb)	2763	_pool_2 (SV *cb)
2224	CODE:	2764	CODE:
2225	{	2765	{
2226	struct coro *coro = SvSTATE (coro_current);	2766	HV *hv = (HV *)SvRV (coro_current);
		2767	struct coro *coro = SvSTATE_hv ((SV *)hv);
2227		2768
2228	sv_setsv (cb, &PL_sv_undef);	2769	sv_setsv (cb, &PL_sv_undef);
2229		2770
2230	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2771	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2231	coro->saved_deffh = 0;	2772	coro->saved_deffh = 0;
…		…
2238	SvREFCNT_dec (old);	2779	SvREFCNT_dec (old);
2239	croak ("\3async_pool terminate\2\n");	2780	croak ("\3async_pool terminate\2\n");
2240	}	2781	}
2241		2782
2242	av_clear (GvAV (PL_defgv));	2783	av_clear (GvAV (PL_defgv));
2243	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2784	hv_store (hv, "desc", sizeof ("desc") - 1,
2244	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2785	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2245		2786
2246	coro->prio = 0;	2787	coro->prio = 0;
2247		2788
2248	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2789	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2249	api_trace (coro_current, 0);	2790	api_trace (aTHX_ coro_current, 0);
2250		2791
2251	av_push (av_async_pool, newSVsv (coro_current));	2792	av_push (av_async_pool, newSVsv (coro_current));
2252	}	2793	}
2253		2794
2254	#if 0
2255		2795
2256	void	2796	MODULE = Coro::State PACKAGE = PerlIO::cede
2257	_generator_call (...)	2797
2258	PROTOTYPE: @	2798	BOOT:
2259	PPCODE:	2799	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2260	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);	2800
2261	xxxx	2801
2262	abort ();	2802	MODULE = Coro::State PACKAGE = Coro::Semaphore
2263		2803
2264	SV *	2804	SV *
2265	gensub (SV *sub, ...)	2805	new (SV *klass, SV *count_ = 0)
2266	PROTOTYPE: &;@	2806	CODE:
2267	CODE:
2268	{	2807	{
2269	struct coro *coro;	2808	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2270	MAGIC *mg;	2809	AV *av = newAV ();
2271	CV *xcv;	2810	SV **ary;
2272	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2273	int i;
2274		2811
2275	CvGV (ncv) = CvGV (cv);	2812	/* unfortunately, building manually saves memory */
2276	CvFILE (ncv) = CvFILE (cv);	2813	Newx (ary, 2, SV *);
		2814	AvALLOC (av) = ary;
		2815	AvARRAY (av) = ary;
		2816	AvMAX (av) = 1;
		2817	AvFILLp (av) = 0;
		2818	ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2277		2819
2278	Newz (0, coro, 1, struct coro);	2820	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
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	}	2821	}
2297	OUTPUT:	2822	OUTPUT:
2298	RETVAL	2823	RETVAL
2299		2824
2300	#endif	2825	SV *
2301		2826	count (SV *self)
2302		2827	CODE:
2303	MODULE = Coro::State PACKAGE = Coro::AIO	2828	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2829	OUTPUT:
		2830	RETVAL
2304		2831
2305	void	2832	void
2306	_get_state (SV *self)	2833	up (SV *self, int adjust = 1)
2307	PPCODE:	2834	ALIAS:
2308	{	2835	adjust = 1
2309	AV *defav = GvAV (PL_defgv);	2836	CODE:
2310	AV *av = newAV ();	2837	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		2838
2334	void	2839	void
2335	_set_state (SV *state)	2840	down (SV *self)
2336	PROTOTYPE: $	2841	CODE:
2337	PPCODE:	2842	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2843
		2844	void
		2845	wait (SV *self)
		2846	CODE:
		2847	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
		2848
		2849	void
		2850	try (SV *self)
		2851	PPCODE:
2338	{	2852	{
2339	AV *av = (AV *)SvRV (state);	2853	AV *av = (AV *)SvRV (self);
2340	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);	2854	SV *count_sv = AvARRAY (av)[0];
		2855	IV count = SvIVX (count_sv);
		2856
		2857	if (count > 0)
		2858	{
		2859	--count;
		2860	SvIVX (count_sv) = count;
		2861	XSRETURN_YES;
		2862	}
		2863	else
		2864	XSRETURN_NO;
		2865	}
		2866
		2867	void
		2868	waiters (SV *self)
		2869	CODE:
		2870	{
		2871	AV *av = (AV *)SvRV (self);
		2872
		2873	if (GIMME_V == G_SCALAR)
		2874	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2875	else
		2876	{
2341	int i;	2877	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));	2878	EXTEND (SP, AvFILLp (av) + 1 - 1);
2349	for (i = 0; i < AvFILLp (av); ++i)	2879	for (i = 1; i <= AvFILLp (av); ++i)
2350	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	2880	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
		2881	}
2351	}	2882	}
2352		2883
2353		2884
2354	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2885	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2355		2886
2356	BOOT:	2887	BOOT:
2357	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2888	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2358		2889
2359	SV *	2890	void
2360	_schedule (...)	2891	_schedule (...)
2361	PROTOTYPE: @
2362	CODE:	2892	CODE:
2363	{	2893	{
2364	static int incede;	2894	static int incede;
2365		2895
2366	api_cede_notself ();	2896	api_cede_notself (aTHX);
2367		2897
2368	++incede;	2898	++incede;
2369	while (coro_nready >= incede && api_cede ())	2899	while (coro_nready >= incede && api_cede (aTHX))
2370	;	2900	;
2371		2901
2372	sv_setsv (sv_activity, &PL_sv_undef);	2902	sv_setsv (sv_activity, &PL_sv_undef);
2373	if (coro_nready >= incede)	2903	if (coro_nready >= incede)
2374	{	2904	{
2375	PUSHMARK (SP);	2905	PUSHMARK (SP);
2376	PUTBACK;	2906	PUTBACK;
2377	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);	2907	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2378	SPAGAIN;
2379	}	2908	}
2380		2909
2381	--incede;	2910	--incede;
2382	}	2911	}
2383		2912
2384		2913
2385	MODULE = Coro::State PACKAGE = PerlIO::cede	2914	MODULE = Coro::State PACKAGE = Coro::AIO
2386		2915
2387	BOOT:	2916	void
2388	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2917	_register (char *target, char *proto, SV *req)
		2918	CODE:
		2919	{
		2920	HV *st;
		2921	GV *gvp;
		2922	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		2923	/* newXSproto doesn't return the CV on 5.8 */
		2924	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		2925	sv_setpv ((SV *)slf_cv, proto);
		2926	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		2927	}
		2928

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