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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.267 by root, Fri Nov 14 06:29:52 2008 UTC vs.
Revision 1.305 by root, Wed Nov 19 10:44:41 2008 UTC

…		…
16		16
17	#ifdef WIN32	17	#ifdef WIN32
18	# undef setjmp	18	# undef setjmp
19	# undef longjmp	19	# undef longjmp
20	# undef _exit	20	# undef _exit
21	# define setjmp _setjmp // deep magic, don't ask	21	# define setjmp _setjmp /* deep magic */
22	#else	22	#else
23	# include <inttypes.h> /* most portable stdint.h */	23	# include <inttypes.h> /* most portable stdint.h */
24	#endif	24	#endif
25		25
26	#ifdef HAVE_MMAP	26	#ifdef HAVE_MMAP
…		…
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 */
		263	SV *rouse_cb;
277		264
278	/* async_pool */	265	/* async_pool */
279	SV *saved_deffh;	266	SV *saved_deffh;
280		267
281	/* linked list */	268	/* linked list */
282	struct coro *next, *prev;	269	struct coro *next, *prev;
283	};	270	};
284		271
285	typedef struct coro *Coro__State;	272	typedef struct coro *Coro__State;
286	typedef struct coro *Coro__State_or_hashref;	273	typedef struct coro *Coro__State_or_hashref;
		274
		275	/* the following variables are effectively part of the perl context */
		276	/* and get copied between struct coro and these variables */
		277	/* the mainr easonw e don't support windows process emulation */
		278	static struct CoroSLF slf_frame; /* the current slf frame */
287		279
288	/** Coro ********************************************************************/	280	/** Coro ********************************************************************/
289		281
290	#define PRIO_MAX 3	282	#define PRIO_MAX 3
291	#define PRIO_HIGH 1	283	#define PRIO_HIGH 1
…		…
296		288
297	/* for Coro.pm */	289	/* for Coro.pm */
298	static SV *coro_current;	290	static SV *coro_current;
299	static SV *coro_readyhook;	291	static SV *coro_readyhook;
300	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	292	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301	static int coro_nready;
302	static struct coro *coro_first;	293	static struct coro *coro_first;
		294	#define coro_nready coroapi.nready
303		295
304	/** lowlevel stuff **********************************************************/	296	/** lowlevel stuff **********************************************************/
305		297
306	static SV *	298	static SV *
307	coro_get_sv (pTHX_ const char *name, int create)	299	coro_get_sv (pTHX_ const char *name, int create)
…		…
392	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	384	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
393		385
394	return 0;	386	return 0;
395	}	387	}
396		388
397	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	389	#define CORO_MAGIC_type_cv 26
398	#define CORO_MAGIC_type_state PERL_MAGIC_ext	390	#define CORO_MAGIC_type_state PERL_MAGIC_ext
399		391
400	static MGVTBL coro_cv_vtbl = {	392	static MGVTBL coro_cv_vtbl = {
401	0, 0, 0, 0,	393	0, 0, 0, 0,
402	coro_cv_free	394	coro_cv_free
403	};	395	};
404		396
		397	#define CORO_MAGIC_NN(sv, type) \
		398	(expect_true (SvMAGIC (sv)->mg_type == type) \
		399	? SvMAGIC (sv) \
		400	: mg_find (sv, type))
		401
405	#define CORO_MAGIC(sv, type) \	402	#define CORO_MAGIC(sv, type) \
406	SvMAGIC (sv) \	403	(expect_true (SvMAGIC (sv)) \
407	? SvMAGIC (sv)->mg_type == type \	404	? CORO_MAGIC_NN (sv, type) \
408	? SvMAGIC (sv) \
409	: mg_find (sv, type) \
410	: 0	405	: 0)
411		406
412	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	407	#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)	408	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
414		409
415	INLINE struct coro *	410	INLINE struct coro *
416	SvSTATE_ (pTHX_ SV *coro)	411	SvSTATE_ (pTHX_ SV *coro)
417	{	412	{
418	HV *stash;	413	HV *stash;
…		…
435	mg = CORO_MAGIC_state (coro);	430	mg = CORO_MAGIC_state (coro);
436	return (struct coro *)mg->mg_ptr;	431	return (struct coro *)mg->mg_ptr;
437	}	432	}
438		433
439	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	434	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		435
		436	/* faster than SvSTATE, but expects a coroutine hv */
		437	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		438	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
440		439
441	/* the next two functions merely cache the padlists */	440	/* the next two functions merely cache the padlists */
442	static void	441	static void
443	get_padlist (pTHX_ CV *cv)	442	get_padlist (pTHX_ CV *cv)
444	{	443	{
…		…
450	else	449	else
451	{	450	{
452	#if CORO_PREFER_PERL_FUNCTIONS	451	#if CORO_PREFER_PERL_FUNCTIONS
453	/* this is probably cleaner? but also slower! */	452	/* this is probably cleaner? but also slower! */
454	/* in practise, it seems to be less stable */	453	/* in practise, it seems to be less stable */
455	CV *cp = Perl_cv_clone (cv);	454	CV *cp = Perl_cv_clone (aTHX_ cv);
456	CvPADLIST (cv) = CvPADLIST (cp);	455	CvPADLIST (cv) = CvPADLIST (cp);
457	CvPADLIST (cp) = 0;	456	CvPADLIST (cp) = 0;
458	SvREFCNT_dec (cp);	457	SvREFCNT_dec (cp);
459	#else	458	#else
460	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	459	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
511	CvPADLIST (cv) = (AV *)POPs;	510	CvPADLIST (cv) = (AV *)POPs;
512	}	511	}
513		512
514	PUTBACK;	513	PUTBACK;
515	}	514	}
		515
		516	slf_frame = c->slf_frame;
		517	CORO_THROW = c->except;
516	}	518	}
517		519
518	static void	520	static void
519	save_perl (pTHX_ Coro__State c)	521	save_perl (pTHX_ Coro__State c)
520	{	522	{
		523	c->except = CORO_THROW;
		524	c->slf_frame = slf_frame;
		525
521	{	526	{
522	dSP;	527	dSP;
523	I32 cxix = cxstack_ix;	528	I32 cxix = cxstack_ix;
524	PERL_CONTEXT *ccstk = cxstack;	529	PERL_CONTEXT *ccstk = cxstack;
525	PERL_SI *top_si = PL_curstackinfo;	530	PERL_SI *top_si = PL_curstackinfo;
…		…
592	#undef VAR	597	#undef VAR
593	}	598	}
594	}	599	}
595		600
596	/*	601	/*
597	* allocate various perl stacks. This is an exact copy	602	* allocate various perl stacks. This is almost an exact copy
598	* of perl.c:init_stacks, except that it uses less memory	603	* of perl.c:init_stacks, except that it uses less memory
599	* on the (sometimes correct) assumption that coroutines do	604	* on the (sometimes correct) assumption that coroutines do
600	* not usually need a lot of stackspace.	605	* not usually need a lot of stackspace.
601	*/	606	*/
602	#if CORO_PREFER_PERL_FUNCTIONS	607	#if CORO_PREFER_PERL_FUNCTIONS
603	# define coro_init_stacks init_stacks	608	# define coro_init_stacks(thx) init_stacks ()
604	#else	609	#else
605	static void	610	static void
606	coro_init_stacks (pTHX)	611	coro_init_stacks (pTHX)
607	{	612	{
608	PL_curstackinfo = new_stackinfo(32, 8);	613	PL_curstackinfo = new_stackinfo(32, 8);
…		…
709	#endif	714	#endif
710	}	715	}
711	}	716	}
712		717
713	return rss;	718	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 sometimes 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	SV **bot = SP;
728
729	int gimme = GIMME_V;
730
731	/* make sure we put something on the stack in scalar context */
732	if (gimme == G_SCALAR)
733	{
734	if (sp == bot)
735	XPUSHs (&PL_sv_undef);
736
737	SP = bot + 1;
738	}
739
740	PUTBACK;
741	}	719	}
742		720
743	/** coroutine stack handling ************************************************/	721	/** coroutine stack handling ************************************************/
744		722
745	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);	723	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
…		…
831		809
832	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	810	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
833	}	811	}
834		812
835	static void	813	static void
		814	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		815	{
		816	/* kind of mega-hacky, but works */
		817	ta->next = ta->prev = (struct coro *)ta;
		818	}
		819
		820	static int
		821	slf_check_nop (pTHX_ struct CoroSLF *frame)
		822	{
		823	return 0;
		824	}
		825
		826	static UNOP coro_setup_op;
		827
		828	static void NOINLINE /* noinline to keep it out of the transfer fast path */
836	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
837	{	830	{
838	/*	831	/*
839	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
840	*/	833	*/
…		…
867	{	860	{
868	dSP;	861	dSP;
869	UNOP myop;	862	UNOP myop;
870		863
871	Zero (&myop, 1, UNOP);	864	Zero (&myop, 1, UNOP);
872	myop.op_next = Nullop;	865	myop.op_next = Nullop;
873	myop.op_flags = OPf_WANT_VOID;	866	myop.op_flags = OPf_WANT_VOID;
874		867
875	PUSHMARK (SP);	868	PUSHMARK (SP);
876	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
877	PUTBACK;	870	PUTBACK;
…		…
879	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
880	SPAGAIN;	873	SPAGAIN;
881	}	874	}
882		875
883	/* this newly created coroutine might be run on an existing cctx which most	876	/* this newly created coroutine might be run on an existing cctx which most
884	* likely was suspended in set_stacklevel, called from pp_set_stacklevel,	877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
885	* so we have to emulate entering pp_set_stacklevel here.
886	*/	878	*/
887	SSL_HEAD;	879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		880	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		881
		882	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		883	coro_setup_op.op_next = PL_op;
		884	coro_setup_op.op_type = OP_CUSTOM;
		885	coro_setup_op.op_ppaddr = pp_slf;
		886	/* no flags required, as an init function won't be called */
		887
		888	PL_op = (OP *)&coro_setup_op;
		889
		890	/* copy throw, in case it was set before coro_setup */
		891	CORO_THROW = coro->except;
888	}	892	}
889		893
890	static void	894	static void
891	coro_destruct (pTHX_ struct coro *coro)	895	coro_destruct (pTHX_ struct coro *coro)
892	{	896	{
…		…
915	SvREFCNT_dec (GvSV (irsgv));	919	SvREFCNT_dec (GvSV (irsgv));
916		920
917	SvREFCNT_dec (PL_diehook);	921	SvREFCNT_dec (PL_diehook);
918	SvREFCNT_dec (PL_warnhook);	922	SvREFCNT_dec (PL_warnhook);
919		923
		924	SvREFCNT_dec (CORO_THROW);
920	SvREFCNT_dec (coro->saved_deffh);	925	SvREFCNT_dec (coro->saved_deffh);
921	SvREFCNT_dec (coro->throw);	926	SvREFCNT_dec (coro->rouse_cb);
922		927
923	coro_destruct_stacks (aTHX);	928	coro_destruct_stacks (aTHX);
924	}	929	}
925		930
926	INLINE void	931	INLINE void
…		…
936	static int	941	static int
937	runops_trace (pTHX)	942	runops_trace (pTHX)
938	{	943	{
939	COP *oldcop = 0;	944	COP *oldcop = 0;
940	int oldcxix = -2;	945	int oldcxix = -2;
941	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	946	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
942	coro_cctx *cctx = coro->cctx;	947	coro_cctx *cctx = coro->cctx;
943		948
944	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	949	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
945	{	950	{
946	PERL_ASYNC_CHECK ();	951	PERL_ASYNC_CHECK ();
…		…
1055		1060
1056	TAINT_NOT;	1061	TAINT_NOT;
1057	return 0;	1062	return 0;
1058	}	1063	}
1059		1064
		1065	static struct coro_cctx *cctx_ssl_cctx;
		1066	static struct CoroSLF cctx_ssl_frame;
		1067
1060	static void	1068	static void
1061	prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)	1069	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1062	{	1070	{
1063	ta->prev = (struct coro *)cctx;	1071	ta->prev = (struct coro *)cctx_ssl_cctx;
1064	ta->next = 0;	1072	ta->next = 0;
1065	}	1073	}
1066		1074
1067	/* inject a fake call to Coro::State::_cctx_init into the execution */	1075	static int
1068	/* _cctx_init should be careful, as it could be called at almost any time */	1076	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1069	/* during execution of a perl program */	1077	{
1070	/* also initialises PL_top_env */	1078	*frame = cctx_ssl_frame;
		1079
		1080	return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
		1081	}
		1082
		1083	/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1071	static void NOINLINE	1084	static void NOINLINE
1072	cctx_prepare (pTHX_ coro_cctx *cctx)	1085	cctx_prepare (pTHX_ coro_cctx *cctx)
1073	{	1086	{
1074	dSP;
1075	UNOP myop;
1076
1077	PL_top_env = &PL_start_env;	1087	PL_top_env = &PL_start_env;
1078		1088
1079	if (cctx->flags & CC_TRACE)	1089	if (cctx->flags & CC_TRACE)
1080	PL_runops = runops_trace;	1090	PL_runops = runops_trace;
1081		1091
1082	Zero (&myop, 1, UNOP);	1092	/* we already must be executing an SLF op, there is no other valid way
1083	myop.op_next = PL_op;	1093	* that can lead to creation of a new cctx */
1084	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1094	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1095	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1085		1096
1086	PUSHMARK (SP);	1097	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1087	EXTEND (SP, 2);	1098	cctx_ssl_cctx = cctx;
1088	PUSHs (sv_2mortal (newSViv ((IV)cctx)));	1099	cctx_ssl_frame = slf_frame;
1089	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1100
1090	PUTBACK;	1101	slf_frame.prepare = slf_prepare_set_stacklevel;
1091	PL_op = (OP *)&myop;	1102	slf_frame.check = slf_check_set_stacklevel;
1092	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1093	SPAGAIN;
1094	}	1103	}
1095		1104
1096	/* the tail of transfer: execute stuff we can only do after a transfer */	1105	/* the tail of transfer: execute stuff we can only do after a transfer */
1097	INLINE void	1106	INLINE void
1098	transfer_tail (pTHX)	1107	transfer_tail (pTHX)
1099	{	1108	{
1100	struct coro *next = (struct coro *)transfer_next;
1101	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1102	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1103
1104	free_coro_mortal (aTHX);	1109	free_coro_mortal (aTHX);
1105	UNLOCK;
1106
1107	if (expect_false (next->throw))
1108	{
1109	SV *exception = sv_2mortal (next->throw);
1110
1111	next->throw = 0;
1112	sv_setsv (ERRSV, exception);
1113	croak (0);
1114	}
1115	}	1110	}
1116		1111
1117	/*	1112	/*
1118	* this is a _very_ stripped down perl interpreter ;)	1113	* this is a _very_ stripped down perl interpreter ;)
1119	*/	1114	*/
…		…
1126	# endif	1121	# endif
1127	#endif	1122	#endif
1128	{	1123	{
1129	dTHX;	1124	dTHX;
1130		1125
1131	/* we are the alternative tail to pp_set_stacklevel */	1126	/* normally we would need to skip the entersub here */
1132	/* so do the same things here */	1127	/* not doing so will re-execute it, which is exactly what we want */
1133	SSL_TAIL;
1134
1135	/* we now skip the op that did lead to transfer() */
1136	PL_op = PL_op->op_next;	1128	/* PL_nop = PL_nop->op_next */
1137		1129
1138	/* inject a fake subroutine call to cctx_init */	1130	/* inject a fake subroutine call to cctx_init */
1139	cctx_prepare (aTHX_ (coro_cctx *)arg);	1131	cctx_prepare (aTHX_ (coro_cctx *)arg);
1140		1132
1141	/* cctx_run is the alternative tail of transfer() */	1133	/* cctx_run is the alternative tail of transfer() */
…		…
1302	/** coroutine switching *****************************************************/	1294	/** coroutine switching *****************************************************/
1303		1295
1304	static void	1296	static void
1305	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1297	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1306	{	1298	{
		1299	/* TODO: throwing up here is considered harmful */
		1300
1307	if (expect_true (prev != next))	1301	if (expect_true (prev != next))
1308	{	1302	{
1309	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1303	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1310	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1304	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1311		1305
1312	if (expect_false (next->flags & CF_RUNNING))	1306	if (expect_false (next->flags & CF_RUNNING))
1313	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1307	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1314		1308
1315	if (expect_false (next->flags & CF_DESTROYED))	1309	if (expect_false (next->flags & CF_DESTROYED))
1316	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1310	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1317		1311
1318	#if !PERL_VERSION_ATLEAST (5,10,0)	1312	#if !PERL_VERSION_ATLEAST (5,10,0)
1319	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1313	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1320	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1314	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1321	#endif	1315	#endif
1322	}	1316	}
1323	}	1317	}
1324		1318
1325	/* always use the TRANSFER macro */	1319	/* always use the TRANSFER macro */
1326	static void NOINLINE	1320	static void NOINLINE /* noinline so we have a fixed stackframe */
1327	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1321	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1328	{	1322	{
1329	dSTACKLEVEL;	1323	dSTACKLEVEL;
1330		1324
1331	/* sometimes transfer is only called to set idle_sp */	1325	/* sometimes transfer is only called to set idle_sp */
…		…
1346	prev->flags |= CF_RUNNING;	1340	prev->flags |= CF_RUNNING;
1347	}	1341	}
1348		1342
1349	prev->flags &= ~CF_RUNNING;	1343	prev->flags &= ~CF_RUNNING;
1350	next->flags |= CF_RUNNING;	1344	next->flags |= CF_RUNNING;
1351
1352	LOCK;
1353		1345
1354	/* first get rid of the old state */	1346	/* first get rid of the old state */
1355	save_perl (aTHX_ prev);	1347	save_perl (aTHX_ prev);
1356		1348
1357	if (expect_false (next->flags & CF_NEW))	1349	if (expect_false (next->flags & CF_NEW))
…		…
1371	prev__cctx->idle_sp == STACKLEVEL	1363	prev__cctx->idle_sp == STACKLEVEL
1372	&& !(prev__cctx->flags & CC_TRACE)	1364	&& !(prev__cctx->flags & CC_TRACE)
1373	&& !force_cctx	1365	&& !force_cctx
1374	))	1366	))
1375	{	1367	{
1376	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1368	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1377	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));	1369	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1378		1370
1379	prev->cctx = 0;	1371	prev->cctx = 0;
1380		1372
1381	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1373	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
…		…
1389		1381
1390	++next->usecount;	1382	++next->usecount;
1391		1383
1392	if (expect_true (!next->cctx))	1384	if (expect_true (!next->cctx))
1393	next->cctx = cctx_get (aTHX);	1385	next->cctx = cctx_get (aTHX);
1394
1395	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1396	transfer_next = next;
1397		1386
1398	if (expect_false (prev__cctx != next->cctx))	1387	if (expect_false (prev__cctx != next->cctx))
1399	{	1388	{
1400	prev__cctx->top_env = PL_top_env;	1389	prev__cctx->top_env = PL_top_env;
1401	PL_top_env = next->cctx->top_env;	1390	PL_top_env = next->cctx->top_env;
…		…
1415	coro_state_destroy (pTHX_ struct coro *coro)	1404	coro_state_destroy (pTHX_ struct coro *coro)
1416	{	1405	{
1417	if (coro->flags & CF_DESTROYED)	1406	if (coro->flags & CF_DESTROYED)
1418	return 0;	1407	return 0;
1419		1408
		1409	if (coro->on_destroy)
		1410	coro->on_destroy (aTHX_ coro);
		1411
1420	coro->flags |= CF_DESTROYED;	1412	coro->flags |= CF_DESTROYED;
1421		1413
1422	if (coro->flags & CF_READY)	1414	if (coro->flags & CF_READY)
1423	{	1415	{
1424	/* reduce nready, as destroying a ready coro effectively unreadies it */	1416	/* reduce nready, as destroying a ready coro effectively unreadies it */
1425	/* alternative: look through all ready queues and remove the coro */	1417	/* alternative: look through all ready queues and remove the coro */
1426	LOCK;
1427	--coro_nready;	1418	--coro_nready;
1428	UNLOCK;
1429	}	1419	}
1430	else	1420	else
1431	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1421	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1432		1422
1433	if (coro->mainstack && coro->mainstack != main_mainstack)	1423	if (coro->mainstack && coro->mainstack != main_mainstack)
1434	{	1424	{
1435	struct coro temp;	1425	struct coro temp;
1436		1426
1437	if (coro->flags & CF_RUNNING)	1427	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1438	croak ("FATAL: tried to destroy currently running coroutine");
1439		1428
1440	save_perl (aTHX_ &temp);	1429	save_perl (aTHX_ &temp);
1441	load_perl (aTHX_ coro);	1430	load_perl (aTHX_ coro);
1442		1431
1443	coro_destruct (aTHX_ coro);	1432	coro_destruct (aTHX_ coro);
…		…
1494	# define MGf_DUP 0	1483	# define MGf_DUP 0
1495	#endif	1484	#endif
1496	};	1485	};
1497		1486
1498	static void	1487	static void
1499	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1488	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1500	{	1489	{
1501	ta->prev = SvSTATE (prev_sv);	1490	ta->prev = SvSTATE (prev_sv);
1502	ta->next = SvSTATE (next_sv);	1491	ta->next = SvSTATE (next_sv);
1503	TRANSFER_CHECK (*ta);	1492	TRANSFER_CHECK (*ta);
1504	}	1493	}
1505		1494
1506	static void	1495	static void
1507	api_transfer (SV *prev_sv, SV *next_sv)	1496	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1508	{	1497	{
1509	dTHX;
1510	struct transfer_args ta;	1498	struct coro_transfer_args ta;
1511		1499
1512	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1500	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1513	TRANSFER (ta, 1);	1501	TRANSFER (ta, 1);
1514	}	1502	}
1515		1503
		1504	/*****************************************************************************/
		1505	/* gensub: simple closure generation utility */
		1506
		1507	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		1508
		1509	/* create a closure from XS, returns a code reference */
		1510	/* the arg can be accessed via GENSUB_ARG from the callback */
		1511	/* the callback must use dXSARGS/XSRETURN */
		1512	static SV *
		1513	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		1514	{
		1515	CV *cv = (CV *)newSV (0);
		1516
		1517	sv_upgrade ((SV *)cv, SVt_PVCV);
		1518
		1519	CvANON_on (cv);
		1520	CvISXSUB_on (cv);
		1521	CvXSUB (cv) = xsub;
		1522	GENSUB_ARG = arg;
		1523
		1524	return newRV_noinc ((SV *)cv);
		1525	}
		1526
1516	/** Coro ********************************************************************/	1527	/** Coro ********************************************************************/
1517		1528
1518	static void	1529	INLINE void
1519	coro_enq (pTHX_ SV *coro_sv)	1530	coro_enq (pTHX_ struct coro *coro)
1520	{	1531	{
1521	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1532	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1522	}	1533	}
1523		1534
1524	static SV *	1535	INLINE SV *
1525	coro_deq (pTHX)	1536	coro_deq (pTHX)
1526	{	1537	{
1527	int prio;	1538	int prio;
1528		1539
1529	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1540	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1532		1543
1533	return 0;	1544	return 0;
1534	}	1545	}
1535		1546
1536	static int	1547	static int
1537	api_ready (SV *coro_sv)	1548	api_ready (pTHX_ SV *coro_sv)
1538	{	1549	{
1539	dTHX;
1540	struct coro *coro;	1550	struct coro *coro;
1541	SV *sv_hook;	1551	SV *sv_hook;
1542	void (*xs_hook)(void);	1552	void (*xs_hook)(void);
1543		1553
1544	if (SvROK (coro_sv))	1554	if (SvROK (coro_sv))
…		…
1549	if (coro->flags & CF_READY)	1559	if (coro->flags & CF_READY)
1550	return 0;	1560	return 0;
1551		1561
1552	coro->flags |= CF_READY;	1562	coro->flags |= CF_READY;
1553		1563
1554	LOCK;
1555
1556	sv_hook = coro_nready ? 0 : coro_readyhook;	1564	sv_hook = coro_nready ? 0 : coro_readyhook;
1557	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1565	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1558		1566
1559	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1567	coro_enq (aTHX_ coro);
1560	++coro_nready;	1568	++coro_nready;
1561		1569
1562	UNLOCK;
1563
1564	if (sv_hook)	1570	if (sv_hook)
1565	{	1571	{
1566	dSP;	1572	dSP;
1567		1573
1568	ENTER;	1574	ENTER;
1569	SAVETMPS;	1575	SAVETMPS;
1570		1576
1571	PUSHMARK (SP);	1577	PUSHMARK (SP);
1572	PUTBACK;	1578	PUTBACK;
1573	call_sv (sv_hook, G_DISCARD);	1579	call_sv (sv_hook, G_VOID | G_DISCARD);
1574	SPAGAIN;
1575		1580
1576	FREETMPS;	1581	FREETMPS;
1577	LEAVE;	1582	LEAVE;
1578	}	1583	}
1579		1584
…		…
1582		1587
1583	return 1;	1588	return 1;
1584	}	1589	}
1585		1590
1586	static int	1591	static int
1587	api_is_ready (SV *coro_sv)	1592	api_is_ready (pTHX_ SV *coro_sv)
1588	{	1593	{
1589	dTHX;
1590
1591	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1594	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1592	}	1595	}
1593		1596
1594	INLINE void	1597	INLINE void
1595	prepare_schedule (pTHX_ struct transfer_args *ta)	1598	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1596	{	1599	{
1597	SV *prev_sv, *next_sv;	1600	SV *prev_sv, *next_sv;
1598		1601
1599	for (;;)	1602	for (;;)
1600	{	1603	{
1601	LOCK;
1602	next_sv = coro_deq (aTHX);	1604	next_sv = coro_deq (aTHX);
1603		1605
1604	/* nothing to schedule: call the idle handler */	1606	/* nothing to schedule: call the idle handler */
1605	if (expect_false (!next_sv))	1607	if (expect_false (!next_sv))
1606	{	1608	{
1607	dSP;	1609	dSP;
1608	UNLOCK;
1609		1610
1610	ENTER;	1611	ENTER;
1611	SAVETMPS;	1612	SAVETMPS;
1612		1613
1613	PUSHMARK (SP);	1614	PUSHMARK (SP);
1614	PUTBACK;	1615	PUTBACK;
1615	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1616	call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1616	SPAGAIN;
1617		1617
1618	FREETMPS;	1618	FREETMPS;
1619	LEAVE;	1619	LEAVE;
1620	continue;	1620	continue;
1621	}	1621	}
1622		1622
1623	ta->next = SvSTATE (next_sv);	1623	ta->next = SvSTATE_hv (next_sv);
1624		1624
1625	/* cannot transfer to destroyed coros, skip and look for next */	1625	/* cannot transfer to destroyed coros, skip and look for next */
1626	if (expect_false (ta->next->flags & CF_DESTROYED))	1626	if (expect_false (ta->next->flags & CF_DESTROYED))
1627	{	1627	{
1628	UNLOCK;
1629	SvREFCNT_dec (next_sv);	1628	SvREFCNT_dec (next_sv);
1630	/* coro_nready has already been taken care of by destroy */	1629	/* coro_nready has already been taken care of by destroy */
1631	continue;	1630	continue;
1632	}	1631	}
1633		1632
1634	--coro_nready;	1633	--coro_nready;
1635	UNLOCK;
1636	break;	1634	break;
1637	}	1635	}
1638		1636
1639	/* free this only after the transfer */	1637	/* free this only after the transfer */
1640	prev_sv = SvRV (coro_current);	1638	prev_sv = SvRV (coro_current);
1641	ta->prev = SvSTATE (prev_sv);	1639	ta->prev = SvSTATE_hv (prev_sv);
1642	TRANSFER_CHECK (*ta);	1640	TRANSFER_CHECK (*ta);
1643	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1641	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1644	ta->next->flags &= ~CF_READY;	1642	ta->next->flags &= ~CF_READY;
1645	SvRV_set (coro_current, next_sv);	1643	SvRV_set (coro_current, next_sv);
1646		1644
1647	LOCK;
1648	free_coro_mortal (aTHX);	1645	free_coro_mortal (aTHX);
1649	coro_mortal = prev_sv;	1646	coro_mortal = prev_sv;
1650	UNLOCK;
1651	}	1647	}
1652		1648
1653	INLINE void	1649	INLINE void
1654	prepare_cede (pTHX_ struct transfer_args *ta)	1650	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1655	{	1651	{
1656	api_ready (coro_current);	1652	api_ready (aTHX_ coro_current);
1657	prepare_schedule (aTHX_ ta);	1653	prepare_schedule (aTHX_ ta);
1658	}	1654	}
1659		1655
1660	static void	1656	INLINE void
1661	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1657	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1662	{	1658	{
1663	SV *prev = SvRV (coro_current);	1659	SV *prev = SvRV (coro_current);
1664		1660
1665	if (coro_nready)	1661	if (coro_nready)
1666	{	1662	{
1667	prepare_schedule (aTHX_ ta);	1663	prepare_schedule (aTHX_ ta);
1668	api_ready (prev);	1664	api_ready (aTHX_ prev);
1669	}	1665	}
1670	else	1666	else
1671	ta->prev = ta->next = SvSTATE (prev);	1667	prepare_nop (aTHX_ ta);
1672	}	1668	}
1673		1669
1674	static void	1670	static void
1675	api_schedule (void)	1671	api_schedule (pTHX)
1676	{	1672	{
1677	dTHX;
1678	struct transfer_args ta;	1673	struct coro_transfer_args ta;
1679		1674
1680	prepare_schedule (aTHX_ &ta);	1675	prepare_schedule (aTHX_ &ta);
1681	TRANSFER (ta, 1);	1676	TRANSFER (ta, 1);
1682	}	1677	}
1683		1678
1684	static int	1679	static int
1685	api_cede (void)	1680	api_cede (pTHX)
1686	{	1681	{
1687	dTHX;
1688	struct transfer_args ta;	1682	struct coro_transfer_args ta;
1689		1683
1690	prepare_cede (aTHX_ &ta);	1684	prepare_cede (aTHX_ &ta);
1691		1685
1692	if (expect_true (ta.prev != ta.next))	1686	if (expect_true (ta.prev != ta.next))
1693	{	1687	{
…		…
1697	else	1691	else
1698	return 0;	1692	return 0;
1699	}	1693	}
1700		1694
1701	static int	1695	static int
1702	api_cede_notself (void)	1696	api_cede_notself (pTHX)
1703	{	1697	{
1704	if (coro_nready)	1698	if (coro_nready)
1705	{	1699	{
1706	dTHX;
1707	struct transfer_args ta;	1700	struct coro_transfer_args ta;
1708		1701
1709	prepare_cede_notself (aTHX_ &ta);	1702	prepare_cede_notself (aTHX_ &ta);
1710	TRANSFER (ta, 1);	1703	TRANSFER (ta, 1);
1711	return 1;	1704	return 1;
1712	}	1705	}
1713	else	1706	else
1714	return 0;	1707	return 0;
1715	}	1708	}
1716		1709
1717	static void	1710	static void
1718	api_trace (SV *coro_sv, int flags)	1711	api_trace (pTHX_ SV *coro_sv, int flags)
1719	{	1712	{
1720	dTHX;
1721	struct coro *coro = SvSTATE (coro_sv);	1713	struct coro *coro = SvSTATE (coro_sv);
1722		1714
1723	if (flags & CC_TRACE)	1715	if (flags & CC_TRACE)
1724	{	1716	{
1725	if (!coro->cctx)	1717	if (!coro->cctx)
1726	coro->cctx = cctx_new_run ();	1718	coro->cctx = cctx_new_run ();
1727	else if (!(coro->cctx->flags & CC_TRACE))	1719	else if (!(coro->cctx->flags & CC_TRACE))
1728	croak ("cannot enable tracing on coroutine with custom stack");	1720	croak ("cannot enable tracing on coroutine with custom stack,");
1729		1721
1730	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1722	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1731	}	1723	}
1732	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1724	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1733	{	1725	{
…		…
1738	else	1730	else
1739	coro->slot->runops = RUNOPS_DEFAULT;	1731	coro->slot->runops = RUNOPS_DEFAULT;
1740	}	1732	}
1741	}	1733	}
1742		1734
1743	#if 0	1735	/*****************************************************************************/
		1736	/* rouse callback */
		1737
		1738	#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
		1739
		1740	static void
		1741	coro_rouse_callback (pTHX_ CV *cv)
		1742	{
		1743	dXSARGS;
		1744	SV *data = (SV *)GENSUB_ARG;
		1745
		1746	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1747	{
		1748	/* first call, set args */
		1749	int i;
		1750	AV *av = newAV ();
		1751	SV *coro = SvRV (data);
		1752
		1753	SvRV_set (data, (SV *)av);
		1754	api_ready (aTHX_ coro);
		1755	SvREFCNT_dec (coro);
		1756
		1757	/* better take a full copy of the arguments */
		1758	while (items--)
		1759	av_store (av, items, newSVsv (ST (items)));
		1760	}
		1761
		1762	XSRETURN_EMPTY;
		1763	}
		1764
1744	static int	1765	static int
1745	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1766	slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1746	{	1767	{
1747	AV *padlist;	1768	SV *data = (SV *)frame->data;
1748	AV *av = (AV *)mg->mg_obj;	1769
		1770	if (CORO_THROW)
		1771	return 0;
1749		1772
1750	abort ();	1773	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1774	return 1;
		1775
		1776	/* now push all results on the stack */
		1777	{
		1778	dSP;
		1779	AV *av = (AV *)SvRV (data);
		1780	int i;
		1781
		1782	EXTEND (SP, AvFILLp (av) + 1);
		1783	for (i = 0; i <= AvFILLp (av); ++i)
		1784	PUSHs (sv_2mortal (AvARRAY (av)[i]));
		1785
		1786	/* we have stolen the elements, so ste length to zero and free */
		1787	AvFILLp (av) = -1;
		1788	av_undef (av);
		1789
		1790	PUTBACK;
		1791	}
1751		1792
1752	return 0;	1793	return 0;
1753	}	1794	}
1754		1795
1755	static MGVTBL coro_gensub_vtbl = {	1796	static void
1756	0, 0, 0, 0,	1797	slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1757	coro_gensub_free	1798	{
1758	};	1799	SV *cb;
1759	#endif	1800
		1801	if (items)
		1802	cb = arg [0];
		1803	else
		1804	{
		1805	struct coro *coro = SvSTATE_current;
		1806
		1807	if (!coro->rouse_cb)
		1808	croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
		1809
		1810	cb = sv_2mortal (coro->rouse_cb);
		1811	coro->rouse_cb = 0;
		1812	}
		1813
		1814	if (!SvROK (cb)
		1815	|| SvTYPE (SvRV (cb)) != SVt_PVCV
		1816	|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
		1817	croak ("Coro::rouse_wait called with illegal callback argument,");
		1818
		1819	{
		1820	CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
		1821	SV *data = (SV *)GENSUB_ARG;
		1822
		1823	frame->data = (void *)data;
		1824	frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
		1825	frame->check = slf_check_rouse_wait;
		1826	}
		1827	}
		1828
		1829	static SV *
		1830	coro_new_rouse_cb (pTHX)
		1831	{
		1832	HV *hv = (HV *)SvRV (coro_current);
		1833	struct coro *coro = SvSTATE_hv (hv);
		1834	SV *data = newRV_inc ((SV *)hv);
		1835	SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
		1836
		1837	sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
		1838	SvREFCNT_dec (data); /* magicext increases the refcount */
		1839
		1840	SvREFCNT_dec (coro->rouse_cb);
		1841	coro->rouse_cb = SvREFCNT_inc_NN (cb);
		1842
		1843	return cb;
		1844	}
		1845
		1846	/*****************************************************************************/
		1847	/* schedule-like-function opcode (SLF) */
		1848
		1849	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1850	static const CV *slf_cv;
		1851	static SV **slf_argv;
		1852	static int slf_argc, slf_arga; /* count, allocated */
		1853	static I32 slf_ax; /* top of stack, for restore */
		1854
		1855	/* this restores the stack in the case we patched the entersub, to */
		1856	/* recreate the stack frame as perl will on following calls */
		1857	/* since entersub cleared the stack */
		1858	static OP *
		1859	pp_restore (pTHX)
		1860	{
		1861	int i;
		1862	SV **SP = PL_stack_base + slf_ax;
		1863
		1864	PUSHMARK (SP);
		1865
		1866	EXTEND (SP, slf_argc + 1);
		1867
		1868	for (i = 0; i < slf_argc; ++i)
		1869	PUSHs (sv_2mortal (slf_argv [i]));
		1870
		1871	PUSHs ((SV *)CvGV (slf_cv));
		1872
		1873	RETURNOP (slf_restore.op_first);
		1874	}
		1875
		1876	static void
		1877	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1878	{
		1879	SV **arg = (SV **)slf_frame.data;
		1880
		1881	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1882	}
		1883
		1884	static void
		1885	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1886	{
		1887	if (items != 2)
		1888	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1889
		1890	frame->prepare = slf_prepare_transfer;
		1891	frame->check = slf_check_nop;
		1892	frame->data = (void *)arg; /* let's hope it will stay valid */
		1893	}
		1894
		1895	static void
		1896	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1897	{
		1898	frame->prepare = prepare_schedule;
		1899	frame->check = slf_check_nop;
		1900	}
		1901
		1902	static void
		1903	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1904	{
		1905	frame->prepare = prepare_cede;
		1906	frame->check = slf_check_nop;
		1907	}
		1908
		1909	static void
		1910	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1911	{
		1912	frame->prepare = prepare_cede_notself;
		1913	frame->check = slf_check_nop;
		1914	}
		1915
		1916	/*
		1917	* these not obviously related functions are all rolled into one
		1918	* function to increase chances that they all will call transfer with the same
		1919	* stack offset
		1920	* SLF stands for "schedule-like-function".
		1921	*/
		1922	static OP *
		1923	pp_slf (pTHX)
		1924	{
		1925	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1926
		1927	/* set up the slf frame, unless it has already been set-up */
		1928	/* the latter happens when a new coro has been started */
		1929	/* or when a new cctx was attached to an existing coroutine */
		1930	if (expect_true (!slf_frame.prepare))
		1931	{
		1932	/* first iteration */
		1933	dSP;
		1934	SV **arg = PL_stack_base + TOPMARK + 1;
		1935	int items = SP - arg; /* args without function object */
		1936	SV *gv = *sp;
		1937
		1938	/* do a quick consistency check on the "function" object, and if it isn't */
		1939	/* for us, divert to the real entersub */
		1940	if (SvTYPE (gv) != SVt_PVGV
		1941	|| !GvCV (gv)
		1942	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1943	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1944
		1945	if (!(PL_op->op_flags & OPf_STACKED))
		1946	{
		1947	/* ampersand-form of call, use @_ instead of stack */
		1948	AV *av = GvAV (PL_defgv);
		1949	arg = AvARRAY (av);
		1950	items = AvFILLp (av) + 1;
		1951	}
		1952
		1953	/* now call the init function, which needs to set up slf_frame */
		1954	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1955	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1956
		1957	/* pop args */
		1958	SP = PL_stack_base + POPMARK;
		1959
		1960	PUTBACK;
		1961	}
		1962
		1963	/* now that we have a slf_frame, interpret it! */
		1964	/* we use a callback system not to make the code needlessly */
		1965	/* complicated, but so we can run multiple perl coros from one cctx */
		1966
		1967	do
		1968	{
		1969	struct coro_transfer_args ta;
		1970
		1971	slf_frame.prepare (aTHX_ &ta);
		1972	TRANSFER (ta, 0);
		1973
		1974	checkmark = PL_stack_sp - PL_stack_base;
		1975	}
		1976	while (slf_frame.check (aTHX_ &slf_frame));
		1977
		1978	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1979
		1980	/* exception handling */
		1981	if (expect_false (CORO_THROW))
		1982	{
		1983	SV *exception = sv_2mortal (CORO_THROW);
		1984
		1985	CORO_THROW = 0;
		1986	sv_setsv (ERRSV, exception);
		1987	croak (0);
		1988	}
		1989
		1990	/* return value handling - mostly like entersub */
		1991	/* make sure we put something on the stack in scalar context */
		1992	if (GIMME_V == G_SCALAR)
		1993	{
		1994	dSP;
		1995	SV **bot = PL_stack_base + checkmark;
		1996
		1997	if (sp == bot) /* too few, push undef */
		1998	bot [1] = &PL_sv_undef;
		1999	else if (sp != bot + 1) /* too many, take last one */
		2000	bot [1] = *sp;
		2001
		2002	SP = bot + 1;
		2003
		2004	PUTBACK;
		2005	}
		2006
		2007	return NORMAL;
		2008	}
		2009
		2010	static void
		2011	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		2012	{
		2013	int i;
		2014	SV **arg = PL_stack_base + ax;
		2015	int items = PL_stack_sp - arg + 1;
		2016
		2017	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		2018
		2019	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		2020	&& PL_op->op_ppaddr != pp_slf)
		2021	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		2022
		2023	CvFLAGS (cv) |= CVf_SLF;
		2024	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		2025	slf_cv = cv;
		2026
		2027	/* we patch the op, and then re-run the whole call */
		2028	/* we have to put the same argument on the stack for this to work */
		2029	/* and this will be done by pp_restore */
		2030	slf_restore.op_next = (OP *)&slf_restore;
		2031	slf_restore.op_type = OP_CUSTOM;
		2032	slf_restore.op_ppaddr = pp_restore;
		2033	slf_restore.op_first = PL_op;
		2034
		2035	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		2036
		2037	if (PL_op->op_flags & OPf_STACKED)
		2038	{
		2039	if (items > slf_arga)
		2040	{
		2041	slf_arga = items;
		2042	free (slf_argv);
		2043	slf_argv = malloc (slf_arga * sizeof (SV *));
		2044	}
		2045
		2046	slf_argc = items;
		2047
		2048	for (i = 0; i < items; ++i)
		2049	slf_argv [i] = SvREFCNT_inc (arg [i]);
		2050	}
		2051	else
		2052	slf_argc = 0;
		2053
		2054	PL_op->op_ppaddr = pp_slf;
		2055	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		2056
		2057	PL_op = (OP *)&slf_restore;
		2058	}
1760		2059
1761	/*****************************************************************************/	2060	/*****************************************************************************/
1762	/* PerlIO::cede */	2061	/* PerlIO::cede */
1763		2062
1764	typedef struct	2063	typedef struct
…		…
1792	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	2091	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1793	double now = nvtime ();	2092	double now = nvtime ();
1794		2093
1795	if (now >= self->next)	2094	if (now >= self->next)
1796	{	2095	{
1797	api_cede ();	2096	api_cede (aTHX);
1798	self->next = now + self->every;	2097	self->next = now + self->every;
1799	}	2098	}
1800		2099
1801	return PerlIOBuf_flush (aTHX_ f);	2100	return PerlIOBuf_flush (aTHX_ f);
1802	}	2101	}
…		…
1832	PerlIOBuf_get_cnt,	2131	PerlIOBuf_get_cnt,
1833	PerlIOBuf_set_ptrcnt,	2132	PerlIOBuf_set_ptrcnt,
1834	};	2133	};
1835		2134
1836	/*****************************************************************************/	2135	/*****************************************************************************/
		2136	/* Coro::Semaphore & Coro::Signal */
1837		2137
1838	static const CV *ssl_cv; /* for quick consistency check */
1839
1840	static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1841	static SV *ssl_arg0;
1842	static SV *ssl_arg1;
1843
1844	/* this restores the stack in the case we patched the entersub, to */
1845	/* recreate the stack frame as perl will on following calls */
1846	/* since entersub cleared the stack */
1847	static OP *	2138	static SV *
1848	pp_restore (pTHX)	2139	coro_waitarray_new (pTHX_ int count)
1849	{	2140	{
		2141	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2142	AV *av = newAV ();
		2143	SV **ary;
		2144
		2145	/* unfortunately, building manually saves memory */
		2146	Newx (ary, 2, SV *);
		2147	AvALLOC (av) = ary;
		2148	/*AvARRAY (av) = ary;*/
		2149	SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
		2150	AvMAX (av) = 1;
		2151	AvFILLp (av) = 0;
		2152	ary [0] = newSViv (count);
		2153
		2154	return newRV_noinc ((SV *)av);
		2155	}
		2156
		2157	/* semaphore */
		2158
		2159	static void
		2160	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2161	{
		2162	SV *count_sv = AvARRAY (av)[0];
		2163	IV count = SvIVX (count_sv);
		2164
		2165	count += adjust;
		2166	SvIVX (count_sv) = count;
		2167
		2168	/* now wake up as many waiters as are expected to lock */
		2169	while (count > 0 && AvFILLp (av) > 0)
		2170	{
		2171	SV *cb;
		2172
		2173	/* swap first two elements so we can shift a waiter */
		2174	AvARRAY (av)[0] = AvARRAY (av)[1];
		2175	AvARRAY (av)[1] = count_sv;
		2176	cb = av_shift (av);
		2177
		2178	if (SvOBJECT (cb))
		2179	api_ready (aTHX_ cb);
		2180	else
		2181	croak ("callbacks not yet supported");
		2182
		2183	SvREFCNT_dec (cb);
		2184
		2185	--count;
		2186	}
		2187	}
		2188
		2189	static void
		2190	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2191	{
		2192	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2193	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2194	}
		2195
		2196	static int
		2197	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
		2198	{
		2199	AV *av = (AV *)frame->data;
		2200	SV *count_sv = AvARRAY (av)[0];
		2201
		2202	/* if we are about to throw, don't actually acquire the lock, just throw */
		2203	if (CORO_THROW)
		2204	return 0;
		2205	else if (SvIVX (count_sv) > 0)
		2206	{
		2207	SvSTATE_current->on_destroy = 0;
		2208
		2209	if (acquire)
		2210	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2211	else
		2212	coro_semaphore_adjust (aTHX_ av, 0);
		2213
		2214	return 0;
		2215	}
		2216	else
		2217	{
		2218	int i;
		2219	/* if we were woken up but can't down, we look through the whole */
		2220	/* waiters list and only add us if we aren't in there already */
		2221	/* this avoids some degenerate memory usage cases */
		2222
		2223	for (i = 1; i <= AvFILLp (av); ++i)
		2224	if (AvARRAY (av)[i] == SvRV (coro_current))
		2225	return 1;
		2226
		2227	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2228	return 1;
		2229	}
		2230	}
		2231
		2232	static int
		2233	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2234	{
		2235	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2236	}
		2237
		2238	static int
		2239	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2240	{
		2241	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2242	}
		2243
		2244	static void
		2245	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2246	{
		2247	AV *av = (AV *)SvRV (arg [0]);
		2248
		2249	if (SvIVX (AvARRAY (av)[0]) > 0)
		2250	{
		2251	frame->data = (void *)av;
		2252	frame->prepare = prepare_nop;
		2253	}
		2254	else
		2255	{
		2256	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2257
		2258	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2259	frame->prepare = prepare_schedule;
		2260
		2261	/* to avoid race conditions when a woken-up coro gets terminated */
		2262	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2263	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2264	}
		2265	}
		2266
		2267	static void
		2268	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2269	{
		2270	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2271	frame->check = slf_check_semaphore_down;
		2272	}
		2273
		2274	static void
		2275	slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2276	{
		2277	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2278	frame->check = slf_check_semaphore_wait;
		2279	}
		2280
		2281	/* signal */
		2282
		2283	static void
		2284	coro_signal_wake (pTHX_ AV *av, int count)
		2285	{
		2286	SvIVX (AvARRAY (av)[0]) = 0;
		2287
		2288	/* now signal count waiters */
		2289	while (count > 0 && AvFILLp (av) > 0)
		2290	{
		2291	SV *cb;
		2292
		2293	/* swap first two elements so we can shift a waiter */
		2294	cb = AvARRAY (av)[0];
		2295	AvARRAY (av)[0] = AvARRAY (av)[1];
		2296	AvARRAY (av)[1] = cb;
		2297
		2298	cb = av_shift (av);
		2299
		2300	api_ready (aTHX_ cb);
		2301	sv_setiv (cb, 0); /* signal waiter */
		2302	SvREFCNT_dec (cb);
		2303
		2304	--count;
		2305	}
		2306	}
		2307
		2308	static int
		2309	slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
		2310	{
		2311	/* if we are about to throw, also stop waiting */
		2312	return SvROK ((SV *)frame->data) && !CORO_THROW;
		2313	}
		2314
		2315	static void
		2316	slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2317	{
		2318	AV *av = (AV *)SvRV (arg [0]);
		2319
		2320	if (SvIVX (AvARRAY (av)[0]))
		2321	{
		2322	SvIVX (AvARRAY (av)[0]) = 0;
		2323	frame->prepare = prepare_nop;
		2324	frame->check = slf_check_nop;
		2325	}
		2326	else
		2327	{
		2328	SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
		2329
		2330	av_push (av, waiter);
		2331
		2332	frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
		2333	frame->prepare = prepare_schedule;
		2334	frame->check = slf_check_signal_wait;
		2335	}
		2336	}
		2337
		2338	/*****************************************************************************/
		2339	/* Coro::AIO */
		2340
		2341	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2342
		2343	/* helper storage struct */
		2344	struct io_state
		2345	{
		2346	int errorno;
		2347	I32 laststype; /* U16 in 5.10.0 */
		2348	int laststatval;
		2349	Stat_t statcache;
		2350	};
		2351
		2352	static void
		2353	coro_aio_callback (pTHX_ CV *cv)
		2354	{
		2355	dXSARGS;
		2356	AV *state = (AV *)GENSUB_ARG;
		2357	SV *coro = av_pop (state);
		2358	SV *data_sv = newSV (sizeof (struct io_state));
		2359
		2360	av_extend (state, items);
		2361
		2362	sv_upgrade (data_sv, SVt_PV);
		2363	SvCUR_set (data_sv, sizeof (struct io_state));
		2364	SvPOK_only (data_sv);
		2365
		2366	{
		2367	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2368
		2369	data->errorno = errno;
		2370	data->laststype = PL_laststype;
		2371	data->laststatval = PL_laststatval;
		2372	data->statcache = PL_statcache;
		2373	}
		2374
		2375	/* now build the result vector out of all the parameters and the data_sv */
		2376	{
		2377	int i;
		2378
		2379	for (i = 0; i < items; ++i)
		2380	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2381	}
		2382
		2383	av_push (state, data_sv);
		2384
		2385	api_ready (aTHX_ coro);
		2386	SvREFCNT_dec (coro);
		2387	SvREFCNT_dec ((AV *)state);
		2388	}
		2389
		2390	static int
		2391	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2392	{
		2393	AV *state = (AV *)frame->data;
		2394
		2395	/* if we are about to throw, return early */
		2396	/* this does not cancel the aio request, but at least */
		2397	/* it quickly returns */
		2398	if (CORO_THROW)
		2399	return 0;
		2400
		2401	/* one element that is an RV? repeat! */
		2402	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2403	return 1;
		2404
		2405	/* restore status */
		2406	{
		2407	SV *data_sv = av_pop (state);
		2408	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2409
		2410	errno = data->errorno;
		2411	PL_laststype = data->laststype;
		2412	PL_laststatval = data->laststatval;
		2413	PL_statcache = data->statcache;
		2414
		2415	SvREFCNT_dec (data_sv);
		2416	}
		2417
		2418	/* push result values */
		2419	{
1850	dSP;	2420	dSP;
		2421	int i;
1851		2422
		2423	EXTEND (SP, AvFILLp (state) + 1);
		2424	for (i = 0; i <= AvFILLp (state); ++i)
		2425	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2426
		2427	PUTBACK;
		2428	}
		2429
		2430	return 0;
		2431	}
		2432
		2433	static void
		2434	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2435	{
		2436	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2437	SV *coro_hv = SvRV (coro_current);
		2438	struct coro *coro = SvSTATE_hv (coro_hv);
		2439
		2440	/* put our coroutine id on the state arg */
		2441	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2442
		2443	/* first see whether we have a non-zero priority and set it as AIO prio */
		2444	if (coro->prio)
		2445	{
		2446	dSP;
		2447
		2448	static SV *prio_cv;
		2449	static SV *prio_sv;
		2450
		2451	if (expect_false (!prio_cv))
		2452	{
		2453	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2454	prio_sv = newSViv (0);
		2455	}
		2456
		2457	PUSHMARK (SP);
		2458	sv_setiv (prio_sv, coro->prio);
		2459	XPUSHs (prio_sv);
		2460
		2461	PUTBACK;
		2462	call_sv (prio_cv, G_VOID | G_DISCARD);
		2463	}
		2464
		2465	/* now call the original request */
		2466	{
		2467	dSP;
		2468	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2469	int i;
		2470
1852	PUSHMARK (SP);	2471	PUSHMARK (SP);
1853		2472
1854	EXTEND (SP, 3);	2473	/* first push all args to the stack */
1855	if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;	2474	EXTEND (SP, items + 1);
1856	if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1857	PUSHs ((SV *)CvGV (ssl_cv));
1858		2475
1859	RETURNOP (ssl_restore.op_first);	2476	for (i = 0; i < items; ++i)
1860	}	2477	PUSHs (arg [i]);
1861		2478
1862	#define OPpENTERSUB_SSL 15 /* the part of op_private entersub hopefully doesn't use */	2479	/* now push the callback closure */
		2480	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1863		2481
1864	/* declare prototype */	2482	/* now call the AIO function - we assume our request is uncancelable */
1865	XS(XS_Coro__State__set_stacklevel);
1866
1867	/*
1868	* these not obviously related functions are all rolled into one
1869	* function to increase chances that they all will call transfer with the same
1870	* stack offset
1871	*/
1872	static OP *
1873	pp_set_stacklevel (pTHX)
1874	{
1875	dSP;
1876	struct transfer_args ta;
1877	SV **arg = PL_stack_base + TOPMARK + 1;
1878	int items = SP - arg; /* args without function object */
1879
1880	/* do a quick consistency check on the "function" object, and if it isn't */
1881	/* for us, divert to the real entersub */
1882	if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1883	return PL_ppaddr[OP_ENTERSUB](aTHX);
1884
1885	/* pop args */
1886	SP = PL_stack_base + POPMARK;
1887
1888	if (!(PL_op->op_flags & OPf_STACKED))
1889	{
1890	/* ampersand-form of call, use @_ instead of stack */
1891	AV *av = GvAV (PL_defgv);
1892	arg = AvARRAY (av);
1893	items = AvFILLp (av) + 1;
1894	}
1895
1896	PUTBACK;	2483	PUTBACK;
1897	switch (PL_op->op_private & OPpENTERSUB_SSL)	2484	call_sv ((SV *)req, G_VOID | G_DISCARD);
1898	{
1899	case 0:
1900	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1901	break;
1902
1903	case 1:
1904	if (items != 2)
1905	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1906
1907	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1908	break;
1909
1910	case 2:
1911	prepare_schedule (aTHX_ &ta);
1912	break;
1913
1914	case 3:
1915	prepare_cede (aTHX_ &ta);
1916	break;
1917
1918	case 4:
1919	prepare_cede_notself (aTHX_ &ta);
1920	break;
1921	}	2485	}
1922		2486
1923	TRANSFER (ta, 0);	2487	/* now that the requets is going, we loop toll we have a result */
1924	SPAGAIN;	2488	frame->data = (void *)state;
1925		2489	frame->prepare = prepare_schedule;
1926	skip:	2490	frame->check = slf_check_aio_req;
1927	PUTBACK;
1928	SSL_TAIL;
1929	SPAGAIN;
1930	RETURN;
1931	}	2491	}
1932		2492
1933	static void	2493	static void
1934	coro_ssl_patch (pTHX_ CV *cv, int ix, SV **args, int items)	2494	coro_aio_req_xs (pTHX_ CV *cv)
1935	{	2495	{
1936	assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));	2496	dXSARGS;
1937		2497
1938	assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));	2498	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1939	ssl_cv = cv;
1940		2499
1941	/* we patch the op, and then re-run the whole call */	2500	XSRETURN_EMPTY;
1942	/* we have to put some dummy argument on the stack for this to work */
1943	ssl_restore.op_next = (OP *)&ssl_restore;
1944	ssl_restore.op_type = OP_NULL;
1945	ssl_restore.op_ppaddr = pp_restore;
1946	ssl_restore.op_first = PL_op;
1947
1948	ssl_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1949	ssl_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1950
1951	PL_op->op_ppaddr = pp_set_stacklevel;
1952	PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
1953
1954	PL_op = (OP *)&ssl_restore;
1955	}	2501	}
		2502
		2503	/*****************************************************************************/
1956		2504
1957	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2505	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1958		2506
1959	PROTOTYPES: DISABLE	2507	PROTOTYPES: DISABLE
1960		2508
1961	BOOT:	2509	BOOT:
1962	{	2510	{
1963	#ifdef USE_ITHREADS	2511	#ifdef USE_ITHREADS
1964	MUTEX_INIT (&coro_lock);
1965	# if CORO_PTHREAD	2512	# if CORO_PTHREAD
1966	coro_thx = PERL_GET_CONTEXT;	2513	coro_thx = PERL_GET_CONTEXT;
1967	# endif	2514	# endif
1968	#endif	2515	#endif
1969	BOOT_PAGESIZE;	2516	BOOT_PAGESIZE;
…		…
1990	main_top_env = PL_top_env;	2537	main_top_env = PL_top_env;
1991		2538
1992	while (main_top_env->je_prev)	2539	while (main_top_env->je_prev)
1993	main_top_env = main_top_env->je_prev;	2540	main_top_env = main_top_env->je_prev;
1994		2541
		2542	{
		2543	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2544
		2545	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2546	hv_store_ent (PL_custom_op_names, slf,
		2547	newSVpv ("coro_slf", 0), 0);
		2548
		2549	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2550	hv_store_ent (PL_custom_op_descs, slf,
		2551	newSVpv ("coro schedule like function", 0), 0);
		2552	}
		2553
1995	coroapi.ver = CORO_API_VERSION;	2554	coroapi.ver = CORO_API_VERSION;
1996	coroapi.rev = CORO_API_REVISION;	2555	coroapi.rev = CORO_API_REVISION;
		2556
1997	coroapi.transfer = api_transfer;	2557	coroapi.transfer = api_transfer;
		2558
		2559	coroapi.sv_state = SvSTATE_;
		2560	coroapi.execute_slf = api_execute_slf;
		2561	coroapi.prepare_nop = prepare_nop;
		2562	coroapi.prepare_schedule = prepare_schedule;
		2563	coroapi.prepare_cede = prepare_cede;
		2564	coroapi.prepare_cede_notself = prepare_cede_notself;
1998		2565
1999	{	2566	{
2000	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2567	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2001		2568
2002	if (!svp) croak ("Time::HiRes is required");	2569	if (!svp) croak ("Time::HiRes is required");
…		…
2036	}	2603	}
2037	OUTPUT:	2604	OUTPUT:
2038	RETVAL	2605	RETVAL
2039		2606
2040	void	2607	void
2041	_set_stacklevel (...)	2608	transfer (...)
2042	ALIAS:	2609	PROTOTYPE: $$
2043	Coro::State::transfer = 1	2610	CODE:
2044	Coro::schedule = 2	2611	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2045	Coro::cede = 3
2046	Coro::cede_notself = 4
2047	CODE:
2048	coro_ssl_patch (aTHX_ cv, ix, &ST (0), items);
2049		2612
2050	bool	2613	bool
2051	_destroy (SV *coro_sv)	2614	_destroy (SV *coro_sv)
2052	CODE:	2615	CODE:
2053	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2616	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2060	CODE:	2623	CODE:
2061	_exit (code);	2624	_exit (code);
2062		2625
2063	int	2626	int
2064	cctx_stacksize (int new_stacksize = 0)	2627	cctx_stacksize (int new_stacksize = 0)
		2628	PROTOTYPE: ;$
2065	CODE:	2629	CODE:
2066	RETVAL = cctx_stacksize;	2630	RETVAL = cctx_stacksize;
2067	if (new_stacksize)	2631	if (new_stacksize)
2068	{	2632	{
2069	cctx_stacksize = new_stacksize;	2633	cctx_stacksize = new_stacksize;
…		…
2072	OUTPUT:	2636	OUTPUT:
2073	RETVAL	2637	RETVAL
2074		2638
2075	int	2639	int
2076	cctx_max_idle (int max_idle = 0)	2640	cctx_max_idle (int max_idle = 0)
		2641	PROTOTYPE: ;$
2077	CODE:	2642	CODE:
2078	RETVAL = cctx_max_idle;	2643	RETVAL = cctx_max_idle;
2079	if (max_idle > 1)	2644	if (max_idle > 1)
2080	cctx_max_idle = max_idle;	2645	cctx_max_idle = max_idle;
2081	OUTPUT:	2646	OUTPUT:
2082	RETVAL	2647	RETVAL
2083		2648
2084	int	2649	int
2085	cctx_count ()	2650	cctx_count ()
		2651	PROTOTYPE:
2086	CODE:	2652	CODE:
2087	RETVAL = cctx_count;	2653	RETVAL = cctx_count;
2088	OUTPUT:	2654	OUTPUT:
2089	RETVAL	2655	RETVAL
2090		2656
2091	int	2657	int
2092	cctx_idle ()	2658	cctx_idle ()
		2659	PROTOTYPE:
2093	CODE:	2660	CODE:
2094	RETVAL = cctx_idle;	2661	RETVAL = cctx_idle;
2095	OUTPUT:	2662	OUTPUT:
2096	RETVAL	2663	RETVAL
2097		2664
2098	void	2665	void
2099	list ()	2666	list ()
		2667	PROTOTYPE:
2100	PPCODE:	2668	PPCODE:
2101	{	2669	{
2102	struct coro *coro;	2670	struct coro *coro;
2103	for (coro = coro_first; coro; coro = coro->next)	2671	for (coro = coro_first; coro; coro = coro->next)
2104	if (coro->hv)	2672	if (coro->hv)
…		…
2166		2734
2167	void	2735	void
2168	throw (Coro::State self, SV *throw = &PL_sv_undef)	2736	throw (Coro::State self, SV *throw = &PL_sv_undef)
2169	PROTOTYPE: $;$	2737	PROTOTYPE: $;$
2170	CODE:	2738	CODE:
		2739	{
		2740	struct coro *current = SvSTATE_current;
		2741	SV **throwp = self == current ? &CORO_THROW : &self->except;
2171	SvREFCNT_dec (self->throw);	2742	SvREFCNT_dec (*throwp);
2172	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2743	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2744	}
2173		2745
2174	void	2746	void
2175	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2747	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2748	PROTOTYPE: $;$
		2749	C_ARGS: aTHX_ coro, flags
2176		2750
2177	SV *	2751	SV *
2178	has_cctx (Coro::State coro)	2752	has_cctx (Coro::State coro)
2179	PROTOTYPE: $	2753	PROTOTYPE: $
2180	CODE:	2754	CODE:
…		…
2204	OUTPUT:	2778	OUTPUT:
2205	RETVAL	2779	RETVAL
2206		2780
2207	void	2781	void
2208	force_cctx ()	2782	force_cctx ()
		2783	PROTOTYPE:
2209	CODE:	2784	CODE:
2210	struct coro *coro = SvSTATE (coro_current);
2211	coro->cctx->idle_sp = 0;	2785	SvSTATE_current->cctx->idle_sp = 0;
2212		2786
2213	void	2787	void
2214	swap_defsv (Coro::State self)	2788	swap_defsv (Coro::State self)
2215	PROTOTYPE: $	2789	PROTOTYPE: $
2216	ALIAS:	2790	ALIAS:
2217	swap_defav = 1	2791	swap_defav = 1
2218	CODE:	2792	CODE:
2219	if (!self->slot)	2793	if (!self->slot)
2220	croak ("cannot swap state with coroutine that has no saved state");	2794	croak ("cannot swap state with coroutine that has no saved state,");
2221	else	2795	else
2222	{	2796	{
2223	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2797	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2224	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2798	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2225		2799
2226	SV *tmp = *src; *src = *dst; *dst = tmp;	2800	SV *tmp = *src; *src = *dst; *dst = tmp;
2227	}	2801	}
		2802
2228		2803
2229	MODULE = Coro::State PACKAGE = Coro	2804	MODULE = Coro::State PACKAGE = Coro
2230		2805
2231	BOOT:	2806	BOOT:
2232	{	2807	{
…		…
2257	coroapi.schedule = api_schedule;	2832	coroapi.schedule = api_schedule;
2258	coroapi.cede = api_cede;	2833	coroapi.cede = api_cede;
2259	coroapi.cede_notself = api_cede_notself;	2834	coroapi.cede_notself = api_cede_notself;
2260	coroapi.ready = api_ready;	2835	coroapi.ready = api_ready;
2261	coroapi.is_ready = api_is_ready;	2836	coroapi.is_ready = api_is_ready;
2262	coroapi.nready = &coro_nready;	2837	coroapi.nready = coro_nready;
2263	coroapi.current = coro_current;	2838	coroapi.current = coro_current;
2264		2839
2265	GCoroAPI = &coroapi;	2840	/*GCoroAPI = &coroapi;*/
2266	sv_setiv (sv, (IV)&coroapi);	2841	sv_setiv (sv, (IV)&coroapi);
2267	SvREADONLY_on (sv);	2842	SvREADONLY_on (sv);
2268	}	2843	}
2269	}	2844	}
		2845
		2846	void
		2847	schedule (...)
		2848	CODE:
		2849	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2850
		2851	void
		2852	cede (...)
		2853	CODE:
		2854	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2855
		2856	void
		2857	cede_notself (...)
		2858	CODE:
		2859	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2270		2860
2271	void	2861	void
2272	_set_current (SV *current)	2862	_set_current (SV *current)
2273	PROTOTYPE: $	2863	PROTOTYPE: $
2274	CODE:	2864	CODE:
…		…
2277		2867
2278	void	2868	void
2279	_set_readyhook (SV *hook)	2869	_set_readyhook (SV *hook)
2280	PROTOTYPE: $	2870	PROTOTYPE: $
2281	CODE:	2871	CODE:
2282	LOCK;
2283	SvREFCNT_dec (coro_readyhook);	2872	SvREFCNT_dec (coro_readyhook);
2284	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2873	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2285	UNLOCK;
2286		2874
2287	int	2875	int
2288	prio (Coro::State coro, int newprio = 0)	2876	prio (Coro::State coro, int newprio = 0)
		2877	PROTOTYPE: $;$
2289	ALIAS:	2878	ALIAS:
2290	nice = 1	2879	nice = 1
2291	CODE:	2880	CODE:
2292	{	2881	{
2293	RETVAL = coro->prio;	2882	RETVAL = coro->prio;
…		…
2308		2897
2309	SV *	2898	SV *
2310	ready (SV *self)	2899	ready (SV *self)
2311	PROTOTYPE: $	2900	PROTOTYPE: $
2312	CODE:	2901	CODE:
2313	RETVAL = boolSV (api_ready (self));	2902	RETVAL = boolSV (api_ready (aTHX_ self));
2314	OUTPUT:	2903	OUTPUT:
2315	RETVAL	2904	RETVAL
2316		2905
2317	int	2906	int
2318	nready (...)	2907	nready (...)
…		…
2325	# for async_pool speedup	2914	# for async_pool speedup
2326	void	2915	void
2327	_pool_1 (SV *cb)	2916	_pool_1 (SV *cb)
2328	CODE:	2917	CODE:
2329	{	2918	{
2330	struct coro *coro = SvSTATE (coro_current);
2331	HV *hv = (HV *)SvRV (coro_current);	2919	HV *hv = (HV *)SvRV (coro_current);
		2920	struct coro *coro = SvSTATE_hv ((SV *)hv);
2332	AV *defav = GvAV (PL_defgv);	2921	AV *defav = GvAV (PL_defgv);
2333	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2922	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2334	AV *invoke_av;	2923	AV *invoke_av;
2335	int i, len;	2924	int i, len;
2336		2925
…		…
2357	{	2946	{
2358	av_fill (defav, len - 1);	2947	av_fill (defav, len - 1);
2359	for (i = 0; i < len; ++i)	2948	for (i = 0; i < len; ++i)
2360	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2949	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2361	}	2950	}
2362
2363	SvREFCNT_dec (invoke);
2364	}	2951	}
2365		2952
2366	void	2953	void
2367	_pool_2 (SV *cb)	2954	_pool_2 (SV *cb)
2368	CODE:	2955	CODE:
2369	{	2956	{
2370	struct coro *coro = SvSTATE (coro_current);	2957	HV *hv = (HV *)SvRV (coro_current);
		2958	struct coro *coro = SvSTATE_hv ((SV *)hv);
2371		2959
2372	sv_setsv (cb, &PL_sv_undef);	2960	sv_setsv (cb, &PL_sv_undef);
2373		2961
2374	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2962	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2375	coro->saved_deffh = 0;	2963	coro->saved_deffh = 0;
…		…
2382	SvREFCNT_dec (old);	2970	SvREFCNT_dec (old);
2383	croak ("\3async_pool terminate\2\n");	2971	croak ("\3async_pool terminate\2\n");
2384	}	2972	}
2385		2973
2386	av_clear (GvAV (PL_defgv));	2974	av_clear (GvAV (PL_defgv));
2387	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2975	hv_store (hv, "desc", sizeof ("desc") - 1,
2388	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2976	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2389		2977
2390	coro->prio = 0;	2978	coro->prio = 0;
2391		2979
2392	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2980	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2393	api_trace (coro_current, 0);	2981	api_trace (aTHX_ coro_current, 0);
2394		2982
2395	av_push (av_async_pool, newSVsv (coro_current));	2983	av_push (av_async_pool, newSVsv (coro_current));
2396	}	2984	}
2397		2985
2398	#if 0
2399
2400	void
2401	_generator_call (...)
2402	PROTOTYPE: @
2403	PPCODE:
2404	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2405	xxxx
2406	abort ();
2407
2408	SV *	2986	SV *
2409	gensub (SV *sub, ...)	2987	rouse_cb ()
2410	PROTOTYPE: &;@	2988	PROTOTYPE:
2411	CODE:	2989	CODE:
2412	{	2990	RETVAL = coro_new_rouse_cb (aTHX);
2413	struct coro *coro;
2414	MAGIC *mg;
2415	CV *xcv;
2416	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2417	int i;
2418
2419	CvGV (ncv) = CvGV (cv);
2420	CvFILE (ncv) = CvFILE (cv);
2421
2422	Newz (0, coro, 1, struct coro);
2423	coro->args = newAV ();
2424	coro->flags = CF_NEW;
2425
2426	av_extend (coro->args, items - 1);
2427	for (i = 1; i < items; i++)
2428	av_push (coro->args, newSVsv (ST (i)));
2429
2430	CvISXSUB_on (ncv);
2431	CvXSUBANY (ncv).any_ptr = (void *)coro;
2432
2433	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2434
2435	CvXSUB (ncv) = CvXSUB (xcv);
2436	CvANON_on (ncv);
2437
2438	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2439	RETVAL = newRV_noinc ((SV *)ncv);
2440	}
2441	OUTPUT:	2991	OUTPUT:
2442	RETVAL	2992	RETVAL
2443		2993
2444	#endif
2445
2446
2447	MODULE = Coro::State PACKAGE = Coro::AIO
2448
2449	void	2994	void
2450	_get_state (SV *self)	2995	rouse_wait (SV *cb = 0)
		2996	PROTOTYPE: ;$
2451	PPCODE:	2997	PPCODE:
2452	{	2998	CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2453	AV *defav = GvAV (PL_defgv);
2454	AV *av = newAV ();
2455	int i;
2456	SV *data_sv = newSV (sizeof (struct io_state));
2457	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2458	SvCUR_set (data_sv, sizeof (struct io_state));
2459	SvPOK_only (data_sv);
2460		2999
2461	data->errorno = errno;
2462	data->laststype = PL_laststype;
2463	data->laststatval = PL_laststatval;
2464	data->statcache = PL_statcache;
2465		3000
2466	av_extend (av, AvFILLp (defav) + 1 + 1);	3001	MODULE = Coro::State PACKAGE = PerlIO::cede
2467		3002
2468	for (i = 0; i <= AvFILLp (defav); ++i)	3003	BOOT:
2469	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));	3004	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2470		3005
2471	av_push (av, data_sv);
2472		3006
2473	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	3007	MODULE = Coro::State PACKAGE = Coro::Semaphore
2474		3008
2475	api_ready (self);	3009	SV *
2476	}	3010	new (SV *klass, SV *count = 0)
		3011	CODE:
		3012	RETVAL = sv_bless (
		3013	coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
		3014	GvSTASH (CvGV (cv))
		3015	);
		3016	OUTPUT:
		3017	RETVAL
		3018
		3019	# helper for Coro::Channel
		3020	SV *
		3021	_alloc (int count)
		3022	CODE:
		3023	RETVAL = coro_waitarray_new (aTHX_ count);
		3024	OUTPUT:
		3025	RETVAL
		3026
		3027	SV *
		3028	count (SV *self)
		3029	CODE:
		3030	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		3031	OUTPUT:
		3032	RETVAL
2477		3033
2478	void	3034	void
2479	_set_state (SV *state)	3035	up (SV *self, int adjust = 1)
2480	PROTOTYPE: $	3036	ALIAS:
		3037	adjust = 1
		3038	CODE:
		3039	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
		3040
		3041	void
		3042	down (SV *self)
		3043	CODE:
		3044	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		3045
		3046	void
		3047	wait (SV *self)
		3048	CODE:
		3049	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
		3050
		3051	void
		3052	try (SV *self)
		3053	PPCODE:
		3054	{
		3055	AV *av = (AV *)SvRV (self);
		3056	SV *count_sv = AvARRAY (av)[0];
		3057	IV count = SvIVX (count_sv);
		3058
		3059	if (count > 0)
		3060	{
		3061	--count;
		3062	SvIVX (count_sv) = count;
		3063	XSRETURN_YES;
		3064	}
		3065	else
		3066	XSRETURN_NO;
		3067	}
		3068
		3069	void
		3070	waiters (SV *self)
		3071	PPCODE:
		3072	{
		3073	AV *av = (AV *)SvRV (self);
		3074	int wcount = AvFILLp (av) + 1 - 1;
		3075
		3076	if (GIMME_V == G_SCALAR)
		3077	XPUSHs (sv_2mortal (newSViv (wcount)));
		3078	else
		3079	{
		3080	int i;
		3081	EXTEND (SP, wcount);
		3082	for (i = 1; i <= wcount; ++i)
		3083	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
		3084	}
		3085	}
		3086
		3087	MODULE = Coro::State PACKAGE = Coro::Signal
		3088
		3089	SV *
		3090	new (SV *klass)
2481	PPCODE:	3091	CODE:
		3092	RETVAL = sv_bless (
		3093	coro_waitarray_new (aTHX_ 0),
		3094	GvSTASH (CvGV (cv))
		3095	);
		3096	OUTPUT:
		3097	RETVAL
		3098
		3099	void
		3100	wait (SV *self)
		3101	CODE:
		3102	CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
		3103
		3104	void
		3105	broadcast (SV *self)
		3106	CODE:
2482	{	3107	{
2483	AV *av = (AV *)SvRV (state);	3108	AV *av = (AV *)SvRV (self);
2484	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);	3109	coro_signal_wake (aTHX_ av, AvFILLp (av));
2485	int i;	3110	}
2486		3111
2487	errno = data->errorno;	3112	void
2488	PL_laststype = data->laststype;	3113	send (SV *self)
2489	PL_laststatval = data->laststatval;	3114	CODE:
2490	PL_statcache = data->statcache;	3115	{
		3116	AV *av = (AV *)SvRV (self);
2491		3117
2492	EXTEND (SP, AvFILLp (av));	3118	if (AvFILLp (av))
2493	for (i = 0; i < AvFILLp (av); ++i)	3119	coro_signal_wake (aTHX_ av, 1);
2494	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	3120	else
		3121	SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2495	}	3122	}
		3123
		3124	IV
		3125	awaited (SV *self)
		3126	CODE:
		3127	RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
		3128	OUTPUT:
		3129	RETVAL
2496		3130
2497		3131
2498	MODULE = Coro::State PACKAGE = Coro::AnyEvent	3132	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2499		3133
2500	BOOT:	3134	BOOT:
2501	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	3135	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2502		3136
2503	SV *	3137	void
2504	_schedule (...)	3138	_schedule (...)
2505	PROTOTYPE: @
2506	CODE:	3139	CODE:
2507	{	3140	{
2508	static int incede;	3141	static int incede;
2509		3142
2510	api_cede_notself ();	3143	api_cede_notself (aTHX);
2511		3144
2512	++incede;	3145	++incede;
2513	while (coro_nready >= incede && api_cede ())	3146	while (coro_nready >= incede && api_cede (aTHX))
2514	;	3147	;
2515		3148
2516	sv_setsv (sv_activity, &PL_sv_undef);	3149	sv_setsv (sv_activity, &PL_sv_undef);
2517	if (coro_nready >= incede)	3150	if (coro_nready >= incede)
2518	{	3151	{
2519	PUSHMARK (SP);	3152	PUSHMARK (SP);
2520	PUTBACK;	3153	PUTBACK;
2521	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);	3154	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2522	SPAGAIN;
2523	}	3155	}
2524		3156
2525	--incede;	3157	--incede;
2526	}	3158	}
2527		3159
2528		3160
2529	MODULE = Coro::State PACKAGE = PerlIO::cede	3161	MODULE = Coro::State PACKAGE = Coro::AIO
2530		3162
2531	BOOT:	3163	void
2532	PerlIO_define_layer (aTHX_ &PerlIO_cede);	3164	_register (char *target, char *proto, SV *req)
		3165	CODE:
		3166	{
		3167	HV *st;
		3168	GV *gvp;
		3169	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		3170	/* newXSproto doesn't return the CV on 5.8 */
		3171	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		3172	sv_setpv ((SV *)slf_cv, proto);
		3173	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		3174	}
2533		3175

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