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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 1.302 by root, Wed Nov 19 04:48:24 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	{
…		…
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
…		…
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	while (items--)
		1758	av_store (av, items, SvREFCNT_inc_NN (ST (items)));
		1759	}
		1760
		1761	XSRETURN_EMPTY;
		1762	}
		1763
1744	static int	1764	static int
1745	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1765	slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1746	{	1766	{
1747	AV *padlist;	1767	SV *data = (SV *)frame->data;
1748	AV *av = (AV *)mg->mg_obj;	1768
		1769	if (CORO_THROW)
		1770	return 0;
1749		1771
1750	abort ();	1772	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1773	return 1;
		1774
		1775	/* now push all results on the stack */
		1776	{
		1777	dSP;
		1778	AV *av = (AV *)SvRV (data);
		1779	int i;
		1780
		1781	EXTEND (SP, AvFILLp (av) + 1);
		1782	for (i = 0; i <= AvFILLp (av); ++i)
		1783	PUSHs (AvARRAY (av)[i]);
		1784
		1785	PUTBACK;
		1786	}
1751		1787
1752	return 0;	1788	return 0;
1753	}	1789	}
1754		1790
1755	static MGVTBL coro_gensub_vtbl = {	1791	static void
1756	0, 0, 0, 0,	1792	slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1757	coro_gensub_free	1793	{
1758	};	1794	SV *cb;
1759	#endif	1795
		1796	if (items)
		1797	cb = arg [0];
		1798	else
		1799	{
		1800	struct coro *coro = SvSTATE_current;
		1801
		1802	if (!coro->rouse_cb)
		1803	croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
		1804
		1805	cb = sv_2mortal (coro->rouse_cb);
		1806	coro->rouse_cb = 0;
		1807	}
		1808
		1809	if (!SvROK (cb)
		1810	|| SvTYPE (SvRV (cb)) != SVt_PVCV
		1811	|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
		1812	croak ("Coro::rouse_wait called with illegal callback argument,");
		1813
		1814	{
		1815	CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
		1816	SV *data = (SV *)GENSUB_ARG;
		1817
		1818	frame->data = (void *)data;
		1819	frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
		1820	frame->check = slf_check_rouse_wait;
		1821	}
		1822	}
		1823
		1824	static SV *
		1825	coro_new_rouse_cb (pTHX)
		1826	{
		1827	HV *hv = (HV *)SvRV (coro_current);
		1828	struct coro *coro = SvSTATE_hv (hv);
		1829	SV *data = newRV_inc ((SV *)hv);
		1830	SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
		1831
		1832	sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
		1833
		1834	SvREFCNT_dec (coro->rouse_cb);
		1835	coro->rouse_cb = SvREFCNT_inc_NN (cb);
		1836
		1837	return cb;
		1838	}
		1839
		1840	/*****************************************************************************/
		1841	/* schedule-like-function opcode (SLF) */
		1842
		1843	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1844	static const CV *slf_cv;
		1845	static SV **slf_argv;
		1846	static int slf_argc, slf_arga; /* count, allocated */
		1847	static I32 slf_ax; /* top of stack, for restore */
		1848
		1849	/* this restores the stack in the case we patched the entersub, to */
		1850	/* recreate the stack frame as perl will on following calls */
		1851	/* since entersub cleared the stack */
		1852	static OP *
		1853	pp_restore (pTHX)
		1854	{
		1855	int i;
		1856	SV **SP = PL_stack_base + slf_ax;
		1857
		1858	PUSHMARK (SP);
		1859
		1860	EXTEND (SP, slf_argc + 1);
		1861
		1862	for (i = 0; i < slf_argc; ++i)
		1863	PUSHs (sv_2mortal (slf_argv [i]));
		1864
		1865	PUSHs ((SV *)CvGV (slf_cv));
		1866
		1867	RETURNOP (slf_restore.op_first);
		1868	}
		1869
		1870	static void
		1871	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1872	{
		1873	SV **arg = (SV **)slf_frame.data;
		1874
		1875	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1876	}
		1877
		1878	static void
		1879	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1880	{
		1881	if (items != 2)
		1882	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1883
		1884	frame->prepare = slf_prepare_transfer;
		1885	frame->check = slf_check_nop;
		1886	frame->data = (void *)arg; /* let's hope it will stay valid */
		1887	}
		1888
		1889	static void
		1890	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1891	{
		1892	frame->prepare = prepare_schedule;
		1893	frame->check = slf_check_nop;
		1894	}
		1895
		1896	static void
		1897	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1898	{
		1899	frame->prepare = prepare_cede;
		1900	frame->check = slf_check_nop;
		1901	}
		1902
		1903	static void
		1904	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1905	{
		1906	frame->prepare = prepare_cede_notself;
		1907	frame->check = slf_check_nop;
		1908	}
		1909
		1910	/*
		1911	* these not obviously related functions are all rolled into one
		1912	* function to increase chances that they all will call transfer with the same
		1913	* stack offset
		1914	* SLF stands for "schedule-like-function".
		1915	*/
		1916	static OP *
		1917	pp_slf (pTHX)
		1918	{
		1919	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1920
		1921	/* set up the slf frame, unless it has already been set-up */
		1922	/* the latter happens when a new coro has been started */
		1923	/* or when a new cctx was attached to an existing coroutine */
		1924	if (expect_true (!slf_frame.prepare))
		1925	{
		1926	/* first iteration */
		1927	dSP;
		1928	SV **arg = PL_stack_base + TOPMARK + 1;
		1929	int items = SP - arg; /* args without function object */
		1930	SV *gv = *sp;
		1931
		1932	/* do a quick consistency check on the "function" object, and if it isn't */
		1933	/* for us, divert to the real entersub */
		1934	if (SvTYPE (gv) != SVt_PVGV
		1935	|| !GvCV (gv)
		1936	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1937	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1938
		1939	if (!(PL_op->op_flags & OPf_STACKED))
		1940	{
		1941	/* ampersand-form of call, use @_ instead of stack */
		1942	AV *av = GvAV (PL_defgv);
		1943	arg = AvARRAY (av);
		1944	items = AvFILLp (av) + 1;
		1945	}
		1946
		1947	/* now call the init function, which needs to set up slf_frame */
		1948	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1949	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1950
		1951	/* pop args */
		1952	SP = PL_stack_base + POPMARK;
		1953
		1954	PUTBACK;
		1955	}
		1956
		1957	/* now that we have a slf_frame, interpret it! */
		1958	/* we use a callback system not to make the code needlessly */
		1959	/* complicated, but so we can run multiple perl coros from one cctx */
		1960
		1961	do
		1962	{
		1963	struct coro_transfer_args ta;
		1964
		1965	slf_frame.prepare (aTHX_ &ta);
		1966	TRANSFER (ta, 0);
		1967
		1968	checkmark = PL_stack_sp - PL_stack_base;
		1969	}
		1970	while (slf_frame.check (aTHX_ &slf_frame));
		1971
		1972	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1973
		1974	/* exception handling */
		1975	if (expect_false (CORO_THROW))
		1976	{
		1977	SV *exception = sv_2mortal (CORO_THROW);
		1978
		1979	CORO_THROW = 0;
		1980	sv_setsv (ERRSV, exception);
		1981	croak (0);
		1982	}
		1983
		1984	/* return value handling - mostly like entersub */
		1985	/* make sure we put something on the stack in scalar context */
		1986	if (GIMME_V == G_SCALAR)
		1987	{
		1988	dSP;
		1989	SV **bot = PL_stack_base + checkmark;
		1990
		1991	if (sp == bot) /* too few, push undef */
		1992	bot [1] = &PL_sv_undef;
		1993	else if (sp != bot + 1) /* too many, take last one */
		1994	bot [1] = *sp;
		1995
		1996	SP = bot + 1;
		1997
		1998	PUTBACK;
		1999	}
		2000
		2001	return NORMAL;
		2002	}
		2003
		2004	static void
		2005	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		2006	{
		2007	int i;
		2008	SV **arg = PL_stack_base + ax;
		2009	int items = PL_stack_sp - arg + 1;
		2010
		2011	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		2012
		2013	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		2014	&& PL_op->op_ppaddr != pp_slf)
		2015	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		2016
		2017	CvFLAGS (cv) |= CVf_SLF;
		2018	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		2019	slf_cv = cv;
		2020
		2021	/* we patch the op, and then re-run the whole call */
		2022	/* we have to put the same argument on the stack for this to work */
		2023	/* and this will be done by pp_restore */
		2024	slf_restore.op_next = (OP *)&slf_restore;
		2025	slf_restore.op_type = OP_CUSTOM;
		2026	slf_restore.op_ppaddr = pp_restore;
		2027	slf_restore.op_first = PL_op;
		2028
		2029	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		2030
		2031	if (PL_op->op_flags & OPf_STACKED)
		2032	{
		2033	if (items > slf_arga)
		2034	{
		2035	slf_arga = items;
		2036	free (slf_argv);
		2037	slf_argv = malloc (slf_arga * sizeof (SV *));
		2038	}
		2039
		2040	slf_argc = items;
		2041
		2042	for (i = 0; i < items; ++i)
		2043	slf_argv [i] = SvREFCNT_inc (arg [i]);
		2044	}
		2045	else
		2046	slf_argc = 0;
		2047
		2048	PL_op->op_ppaddr = pp_slf;
		2049	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		2050
		2051	PL_op = (OP *)&slf_restore;
		2052	}
1760		2053
1761	/*****************************************************************************/	2054	/*****************************************************************************/
1762	/* PerlIO::cede */	2055	/* PerlIO::cede */
1763		2056
1764	typedef struct	2057	typedef struct
…		…
1792	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	2085	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1793	double now = nvtime ();	2086	double now = nvtime ();
1794		2087
1795	if (now >= self->next)	2088	if (now >= self->next)
1796	{	2089	{
1797	api_cede ();	2090	api_cede (aTHX);
1798	self->next = now + self->every;	2091	self->next = now + self->every;
1799	}	2092	}
1800		2093
1801	return PerlIOBuf_flush (aTHX_ f);	2094	return PerlIOBuf_flush (aTHX_ f);
1802	}	2095	}
…		…
1832	PerlIOBuf_get_cnt,	2125	PerlIOBuf_get_cnt,
1833	PerlIOBuf_set_ptrcnt,	2126	PerlIOBuf_set_ptrcnt,
1834	};	2127	};
1835		2128
1836	/*****************************************************************************/	2129	/*****************************************************************************/
		2130	/* Coro::Semaphore & Coro::Signal */
1837		2131
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 *	2132	static SV *
1848	pp_restore (pTHX)	2133	coro_waitarray_new (pTHX_ int count)
1849	{	2134	{
		2135	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2136	AV *av = newAV ();
		2137	SV **ary;
		2138
		2139	/* unfortunately, building manually saves memory */
		2140	Newx (ary, 2, SV *);
		2141	AvALLOC (av) = ary;
		2142	AvARRAY (av) = ary;
		2143	AvMAX (av) = 1;
		2144	AvFILLp (av) = 0;
		2145	ary [0] = newSViv (count);
		2146
		2147	return newRV_noinc ((SV *)av);
		2148	}
		2149
		2150	/* semaphore */
		2151
		2152	static void
		2153	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2154	{
		2155	SV *count_sv = AvARRAY (av)[0];
		2156	IV count = SvIVX (count_sv);
		2157
		2158	count += adjust;
		2159	SvIVX (count_sv) = count;
		2160
		2161	/* now wake up as many waiters as are expected to lock */
		2162	while (count > 0 && AvFILLp (av) > 0)
		2163	{
		2164	SV *cb;
		2165
		2166	/* swap first two elements so we can shift a waiter */
		2167	AvARRAY (av)[0] = AvARRAY (av)[1];
		2168	AvARRAY (av)[1] = count_sv;
		2169	cb = av_shift (av);
		2170
		2171	if (SvOBJECT (cb))
		2172	api_ready (aTHX_ cb);
		2173	else
		2174	croak ("callbacks not yet supported");
		2175
		2176	SvREFCNT_dec (cb);
		2177
		2178	--count;
		2179	}
		2180	}
		2181
		2182	static void
		2183	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2184	{
		2185	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2186	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2187	}
		2188
		2189	static int
		2190	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
		2191	{
		2192	AV *av = (AV *)frame->data;
		2193	SV *count_sv = AvARRAY (av)[0];
		2194
		2195	/* if we are about to throw, don't actually acquire the lock, just throw */
		2196	if (CORO_THROW)
		2197	return 0;
		2198	else if (SvIVX (count_sv) > 0)
		2199	{
		2200	SvSTATE_current->on_destroy = 0;
		2201
		2202	if (acquire)
		2203	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2204	else
		2205	coro_semaphore_adjust (aTHX_ av, 0);
		2206
		2207	return 0;
		2208	}
		2209	else
		2210	{
		2211	int i;
		2212	/* if we were woken up but can't down, we look through the whole */
		2213	/* waiters list and only add us if we aren't in there already */
		2214	/* this avoids some degenerate memory usage cases */
		2215
		2216	for (i = 1; i <= AvFILLp (av); ++i)
		2217	if (AvARRAY (av)[i] == SvRV (coro_current))
		2218	return 1;
		2219
		2220	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2221	return 1;
		2222	}
		2223	}
		2224
		2225	static int
		2226	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2227	{
		2228	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2229	}
		2230
		2231	static int
		2232	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2233	{
		2234	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2235	}
		2236
		2237	static void
		2238	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2239	{
		2240	AV *av = (AV *)SvRV (arg [0]);
		2241
		2242	if (SvIVX (AvARRAY (av)[0]) > 0)
		2243	{
		2244	frame->data = (void *)av;
		2245	frame->prepare = prepare_nop;
		2246	}
		2247	else
		2248	{
		2249	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2250
		2251	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2252	frame->prepare = prepare_schedule;
		2253
		2254	/* to avoid race conditions when a woken-up coro gets terminated */
		2255	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2256	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2257	}
		2258	}
		2259
		2260	static void
		2261	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2262	{
		2263	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2264	frame->check = slf_check_semaphore_down;
		2265	}
		2266
		2267	static void
		2268	slf_init_semaphore_wait (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_wait;
		2272	}
		2273
		2274	/* signal */
		2275
		2276	static void
		2277	coro_signal_wake (pTHX_ AV *av, int count)
		2278	{
		2279	SvIVX (AvARRAY (av)[0]) = 0;
		2280
		2281	/* now signal count waiters */
		2282	while (count > 0 && AvFILLp (av) > 0)
		2283	{
		2284	SV *cb;
		2285
		2286	/* swap first two elements so we can shift a waiter */
		2287	cb = AvARRAY (av)[0];
		2288	AvARRAY (av)[0] = AvARRAY (av)[1];
		2289	AvARRAY (av)[1] = cb;
		2290
		2291	cb = av_shift (av);
		2292
		2293	api_ready (aTHX_ cb);
		2294	sv_setiv (cb, 0); /* signal waiter */
		2295	SvREFCNT_dec (cb);
		2296
		2297	--count;
		2298	}
		2299	}
		2300
		2301	static int
		2302	slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
		2303	{
		2304	/* if we are about to throw, also stop waiting */
		2305	return SvROK ((SV *)frame->data) && !CORO_THROW;
		2306	}
		2307
		2308	static void
		2309	slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2310	{
		2311	AV *av = (AV *)SvRV (arg [0]);
		2312
		2313	if (SvIVX (AvARRAY (av)[0]))
		2314	{
		2315	SvIVX (AvARRAY (av)[0]) = 0;
		2316	frame->prepare = prepare_nop;
		2317	frame->check = slf_check_nop;
		2318	}
		2319	else
		2320	{
		2321	SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
		2322
		2323	av_push (av, waiter);
		2324
		2325	frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
		2326	frame->prepare = prepare_schedule;
		2327	frame->check = slf_check_signal_wait;
		2328	}
		2329	}
		2330
		2331	/*****************************************************************************/
		2332	/* Coro::AIO */
		2333
		2334	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2335
		2336	/* helper storage struct */
		2337	struct io_state
		2338	{
		2339	int errorno;
		2340	I32 laststype; /* U16 in 5.10.0 */
		2341	int laststatval;
		2342	Stat_t statcache;
		2343	};
		2344
		2345	static void
		2346	coro_aio_callback (pTHX_ CV *cv)
		2347	{
		2348	dXSARGS;
		2349	AV *state = (AV *)GENSUB_ARG;
		2350	SV *coro = av_pop (state);
		2351	SV *data_sv = newSV (sizeof (struct io_state));
		2352
		2353	av_extend (state, items);
		2354
		2355	sv_upgrade (data_sv, SVt_PV);
		2356	SvCUR_set (data_sv, sizeof (struct io_state));
		2357	SvPOK_only (data_sv);
		2358
		2359	{
		2360	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2361
		2362	data->errorno = errno;
		2363	data->laststype = PL_laststype;
		2364	data->laststatval = PL_laststatval;
		2365	data->statcache = PL_statcache;
		2366	}
		2367
		2368	/* now build the result vector out of all the parameters and the data_sv */
		2369	{
		2370	int i;
		2371
		2372	for (i = 0; i < items; ++i)
		2373	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2374	}
		2375
		2376	av_push (state, data_sv);
		2377
		2378	api_ready (aTHX_ coro);
		2379	SvREFCNT_dec (coro);
		2380	SvREFCNT_dec ((AV *)state);
		2381	}
		2382
		2383	static int
		2384	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2385	{
		2386	AV *state = (AV *)frame->data;
		2387
		2388	/* if we are about to throw, return early */
		2389	/* this does not cancel the aio request, but at least */
		2390	/* it quickly returns */
		2391	if (CORO_THROW)
		2392	return 0;
		2393
		2394	/* one element that is an RV? repeat! */
		2395	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2396	return 1;
		2397
		2398	/* restore status */
		2399	{
		2400	SV *data_sv = av_pop (state);
		2401	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2402
		2403	errno = data->errorno;
		2404	PL_laststype = data->laststype;
		2405	PL_laststatval = data->laststatval;
		2406	PL_statcache = data->statcache;
		2407
		2408	SvREFCNT_dec (data_sv);
		2409	}
		2410
		2411	/* push result values */
		2412	{
1850	dSP;	2413	dSP;
		2414	int i;
1851		2415
		2416	EXTEND (SP, AvFILLp (state) + 1);
		2417	for (i = 0; i <= AvFILLp (state); ++i)
		2418	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2419
		2420	PUTBACK;
		2421	}
		2422
		2423	return 0;
		2424	}
		2425
		2426	static void
		2427	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2428	{
		2429	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2430	SV *coro_hv = SvRV (coro_current);
		2431	struct coro *coro = SvSTATE_hv (coro_hv);
		2432
		2433	/* put our coroutine id on the state arg */
		2434	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2435
		2436	/* first see whether we have a non-zero priority and set it as AIO prio */
		2437	if (coro->prio)
		2438	{
		2439	dSP;
		2440
		2441	static SV *prio_cv;
		2442	static SV *prio_sv;
		2443
		2444	if (expect_false (!prio_cv))
		2445	{
		2446	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2447	prio_sv = newSViv (0);
		2448	}
		2449
		2450	PUSHMARK (SP);
		2451	sv_setiv (prio_sv, coro->prio);
		2452	XPUSHs (prio_sv);
		2453
		2454	PUTBACK;
		2455	call_sv (prio_cv, G_VOID | G_DISCARD);
		2456	}
		2457
		2458	/* now call the original request */
		2459	{
		2460	dSP;
		2461	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2462	int i;
		2463
1852	PUSHMARK (SP);	2464	PUSHMARK (SP);
1853		2465
1854	EXTEND (SP, 3);	2466	/* first push all args to the stack */
1855	if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;	2467	EXTEND (SP, items + 1);
1856	if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1857	PUSHs ((SV *)CvGV (ssl_cv));
1858		2468
1859	RETURNOP (ssl_restore.op_first);	2469	for (i = 0; i < items; ++i)
1860	}	2470	PUSHs (arg [i]);
1861		2471
1862	#define OPpENTERSUB_SSL 15 /* the part of op_private entersub hopefully doesn't use */	2472	/* now push the callback closure */
		2473	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1863		2474
1864	/* declare prototype */	2475	/* 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;	2476	PUTBACK;
1897	switch (PL_op->op_private & OPpENTERSUB_SSL)	2477	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	}	2478	}
1922		2479
1923	TRANSFER (ta, 0);	2480	/* now that the requets is going, we loop toll we have a result */
1924	SPAGAIN;	2481	frame->data = (void *)state;
1925		2482	frame->prepare = prepare_schedule;
1926	skip:	2483	frame->check = slf_check_aio_req;
1927	PUTBACK;
1928	SSL_TAIL;
1929	SPAGAIN;
1930	RETURN;
1931	}	2484	}
1932		2485
1933	static void	2486	static void
1934	coro_ssl_patch (pTHX_ CV *cv, int ix, SV **args, int items)	2487	coro_aio_req_xs (pTHX_ CV *cv)
1935	{	2488	{
1936	assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));	2489	dXSARGS;
1937		2490
1938	assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));	2491	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1939	ssl_cv = cv;
1940		2492
1941	/* we patch the op, and then re-run the whole call */	2493	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	}	2494	}
		2495
		2496	/*****************************************************************************/
1956		2497
1957	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2498	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1958		2499
1959	PROTOTYPES: DISABLE	2500	PROTOTYPES: DISABLE
1960		2501
1961	BOOT:	2502	BOOT:
1962	{	2503	{
1963	#ifdef USE_ITHREADS	2504	#ifdef USE_ITHREADS
1964	MUTEX_INIT (&coro_lock);
1965	# if CORO_PTHREAD	2505	# if CORO_PTHREAD
1966	coro_thx = PERL_GET_CONTEXT;	2506	coro_thx = PERL_GET_CONTEXT;
1967	# endif	2507	# endif
1968	#endif	2508	#endif
1969	BOOT_PAGESIZE;	2509	BOOT_PAGESIZE;
…		…
1990	main_top_env = PL_top_env;	2530	main_top_env = PL_top_env;
1991		2531
1992	while (main_top_env->je_prev)	2532	while (main_top_env->je_prev)
1993	main_top_env = main_top_env->je_prev;	2533	main_top_env = main_top_env->je_prev;
1994		2534
		2535	{
		2536	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2537
		2538	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2539	hv_store_ent (PL_custom_op_names, slf,
		2540	newSVpv ("coro_slf", 0), 0);
		2541
		2542	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2543	hv_store_ent (PL_custom_op_descs, slf,
		2544	newSVpv ("coro schedule like function", 0), 0);
		2545	}
		2546
1995	coroapi.ver = CORO_API_VERSION;	2547	coroapi.ver = CORO_API_VERSION;
1996	coroapi.rev = CORO_API_REVISION;	2548	coroapi.rev = CORO_API_REVISION;
		2549
1997	coroapi.transfer = api_transfer;	2550	coroapi.transfer = api_transfer;
		2551
		2552	coroapi.sv_state = SvSTATE_;
		2553	coroapi.execute_slf = api_execute_slf;
		2554	coroapi.prepare_nop = prepare_nop;
		2555	coroapi.prepare_schedule = prepare_schedule;
		2556	coroapi.prepare_cede = prepare_cede;
		2557	coroapi.prepare_cede_notself = prepare_cede_notself;
1998		2558
1999	{	2559	{
2000	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2560	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2001		2561
2002	if (!svp) croak ("Time::HiRes is required");	2562	if (!svp) croak ("Time::HiRes is required");
…		…
2036	}	2596	}
2037	OUTPUT:	2597	OUTPUT:
2038	RETVAL	2598	RETVAL
2039		2599
2040	void	2600	void
2041	_set_stacklevel (...)	2601	transfer (...)
2042	ALIAS:	2602	PROTOTYPE: $$
2043	Coro::State::transfer = 1	2603	CODE:
2044	Coro::schedule = 2	2604	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		2605
2050	bool	2606	bool
2051	_destroy (SV *coro_sv)	2607	_destroy (SV *coro_sv)
2052	CODE:	2608	CODE:
2053	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2609	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2060	CODE:	2616	CODE:
2061	_exit (code);	2617	_exit (code);
2062		2618
2063	int	2619	int
2064	cctx_stacksize (int new_stacksize = 0)	2620	cctx_stacksize (int new_stacksize = 0)
		2621	PROTOTYPE: ;$
2065	CODE:	2622	CODE:
2066	RETVAL = cctx_stacksize;	2623	RETVAL = cctx_stacksize;
2067	if (new_stacksize)	2624	if (new_stacksize)
2068	{	2625	{
2069	cctx_stacksize = new_stacksize;	2626	cctx_stacksize = new_stacksize;
…		…
2072	OUTPUT:	2629	OUTPUT:
2073	RETVAL	2630	RETVAL
2074		2631
2075	int	2632	int
2076	cctx_max_idle (int max_idle = 0)	2633	cctx_max_idle (int max_idle = 0)
		2634	PROTOTYPE: ;$
2077	CODE:	2635	CODE:
2078	RETVAL = cctx_max_idle;	2636	RETVAL = cctx_max_idle;
2079	if (max_idle > 1)	2637	if (max_idle > 1)
2080	cctx_max_idle = max_idle;	2638	cctx_max_idle = max_idle;
2081	OUTPUT:	2639	OUTPUT:
2082	RETVAL	2640	RETVAL
2083		2641
2084	int	2642	int
2085	cctx_count ()	2643	cctx_count ()
		2644	PROTOTYPE:
2086	CODE:	2645	CODE:
2087	RETVAL = cctx_count;	2646	RETVAL = cctx_count;
2088	OUTPUT:	2647	OUTPUT:
2089	RETVAL	2648	RETVAL
2090		2649
2091	int	2650	int
2092	cctx_idle ()	2651	cctx_idle ()
		2652	PROTOTYPE:
2093	CODE:	2653	CODE:
2094	RETVAL = cctx_idle;	2654	RETVAL = cctx_idle;
2095	OUTPUT:	2655	OUTPUT:
2096	RETVAL	2656	RETVAL
2097		2657
2098	void	2658	void
2099	list ()	2659	list ()
		2660	PROTOTYPE:
2100	PPCODE:	2661	PPCODE:
2101	{	2662	{
2102	struct coro *coro;	2663	struct coro *coro;
2103	for (coro = coro_first; coro; coro = coro->next)	2664	for (coro = coro_first; coro; coro = coro->next)
2104	if (coro->hv)	2665	if (coro->hv)
…		…
2166		2727
2167	void	2728	void
2168	throw (Coro::State self, SV *throw = &PL_sv_undef)	2729	throw (Coro::State self, SV *throw = &PL_sv_undef)
2169	PROTOTYPE: $;$	2730	PROTOTYPE: $;$
2170	CODE:	2731	CODE:
		2732	{
		2733	struct coro *current = SvSTATE_current;
		2734	SV **throwp = self == current ? &CORO_THROW : &self->except;
2171	SvREFCNT_dec (self->throw);	2735	SvREFCNT_dec (*throwp);
2172	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2736	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2737	}
2173		2738
2174	void	2739	void
2175	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2740	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2741	PROTOTYPE: $;$
		2742	C_ARGS: aTHX_ coro, flags
2176		2743
2177	SV *	2744	SV *
2178	has_cctx (Coro::State coro)	2745	has_cctx (Coro::State coro)
2179	PROTOTYPE: $	2746	PROTOTYPE: $
2180	CODE:	2747	CODE:
…		…
2204	OUTPUT:	2771	OUTPUT:
2205	RETVAL	2772	RETVAL
2206		2773
2207	void	2774	void
2208	force_cctx ()	2775	force_cctx ()
		2776	PROTOTYPE:
2209	CODE:	2777	CODE:
2210	struct coro *coro = SvSTATE (coro_current);
2211	coro->cctx->idle_sp = 0;	2778	SvSTATE_current->cctx->idle_sp = 0;
2212		2779
2213	void	2780	void
2214	swap_defsv (Coro::State self)	2781	swap_defsv (Coro::State self)
2215	PROTOTYPE: $	2782	PROTOTYPE: $
2216	ALIAS:	2783	ALIAS:
2217	swap_defav = 1	2784	swap_defav = 1
2218	CODE:	2785	CODE:
2219	if (!self->slot)	2786	if (!self->slot)
2220	croak ("cannot swap state with coroutine that has no saved state");	2787	croak ("cannot swap state with coroutine that has no saved state,");
2221	else	2788	else
2222	{	2789	{
2223	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2790	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2224	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2791	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2225		2792
2226	SV *tmp = *src; *src = *dst; *dst = tmp;	2793	SV *tmp = *src; *src = *dst; *dst = tmp;
2227	}	2794	}
		2795
2228		2796
2229	MODULE = Coro::State PACKAGE = Coro	2797	MODULE = Coro::State PACKAGE = Coro
2230		2798
2231	BOOT:	2799	BOOT:
2232	{	2800	{
…		…
2257	coroapi.schedule = api_schedule;	2825	coroapi.schedule = api_schedule;
2258	coroapi.cede = api_cede;	2826	coroapi.cede = api_cede;
2259	coroapi.cede_notself = api_cede_notself;	2827	coroapi.cede_notself = api_cede_notself;
2260	coroapi.ready = api_ready;	2828	coroapi.ready = api_ready;
2261	coroapi.is_ready = api_is_ready;	2829	coroapi.is_ready = api_is_ready;
2262	coroapi.nready = &coro_nready;	2830	coroapi.nready = coro_nready;
2263	coroapi.current = coro_current;	2831	coroapi.current = coro_current;
2264		2832
2265	GCoroAPI = &coroapi;	2833	/*GCoroAPI = &coroapi;*/
2266	sv_setiv (sv, (IV)&coroapi);	2834	sv_setiv (sv, (IV)&coroapi);
2267	SvREADONLY_on (sv);	2835	SvREADONLY_on (sv);
2268	}	2836	}
2269	}	2837	}
		2838
		2839	void
		2840	schedule (...)
		2841	CODE:
		2842	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2843
		2844	void
		2845	cede (...)
		2846	CODE:
		2847	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2848
		2849	void
		2850	cede_notself (...)
		2851	CODE:
		2852	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2270		2853
2271	void	2854	void
2272	_set_current (SV *current)	2855	_set_current (SV *current)
2273	PROTOTYPE: $	2856	PROTOTYPE: $
2274	CODE:	2857	CODE:
…		…
2277		2860
2278	void	2861	void
2279	_set_readyhook (SV *hook)	2862	_set_readyhook (SV *hook)
2280	PROTOTYPE: $	2863	PROTOTYPE: $
2281	CODE:	2864	CODE:
2282	LOCK;
2283	SvREFCNT_dec (coro_readyhook);	2865	SvREFCNT_dec (coro_readyhook);
2284	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2866	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2285	UNLOCK;
2286		2867
2287	int	2868	int
2288	prio (Coro::State coro, int newprio = 0)	2869	prio (Coro::State coro, int newprio = 0)
		2870	PROTOTYPE: $;$
2289	ALIAS:	2871	ALIAS:
2290	nice = 1	2872	nice = 1
2291	CODE:	2873	CODE:
2292	{	2874	{
2293	RETVAL = coro->prio;	2875	RETVAL = coro->prio;
…		…
2308		2890
2309	SV *	2891	SV *
2310	ready (SV *self)	2892	ready (SV *self)
2311	PROTOTYPE: $	2893	PROTOTYPE: $
2312	CODE:	2894	CODE:
2313	RETVAL = boolSV (api_ready (self));	2895	RETVAL = boolSV (api_ready (aTHX_ self));
2314	OUTPUT:	2896	OUTPUT:
2315	RETVAL	2897	RETVAL
2316		2898
2317	int	2899	int
2318	nready (...)	2900	nready (...)
…		…
2325	# for async_pool speedup	2907	# for async_pool speedup
2326	void	2908	void
2327	_pool_1 (SV *cb)	2909	_pool_1 (SV *cb)
2328	CODE:	2910	CODE:
2329	{	2911	{
2330	struct coro *coro = SvSTATE (coro_current);
2331	HV *hv = (HV *)SvRV (coro_current);	2912	HV *hv = (HV *)SvRV (coro_current);
		2913	struct coro *coro = SvSTATE_hv ((SV *)hv);
2332	AV *defav = GvAV (PL_defgv);	2914	AV *defav = GvAV (PL_defgv);
2333	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2915	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2334	AV *invoke_av;	2916	AV *invoke_av;
2335	int i, len;	2917	int i, len;
2336		2918
…		…
2357	{	2939	{
2358	av_fill (defav, len - 1);	2940	av_fill (defav, len - 1);
2359	for (i = 0; i < len; ++i)	2941	for (i = 0; i < len; ++i)
2360	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2942	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2361	}	2943	}
2362
2363	SvREFCNT_dec (invoke);
2364	}	2944	}
2365		2945
2366	void	2946	void
2367	_pool_2 (SV *cb)	2947	_pool_2 (SV *cb)
2368	CODE:	2948	CODE:
2369	{	2949	{
2370	struct coro *coro = SvSTATE (coro_current);	2950	HV *hv = (HV *)SvRV (coro_current);
		2951	struct coro *coro = SvSTATE_hv ((SV *)hv);
2371		2952
2372	sv_setsv (cb, &PL_sv_undef);	2953	sv_setsv (cb, &PL_sv_undef);
2373		2954
2374	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2955	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2375	coro->saved_deffh = 0;	2956	coro->saved_deffh = 0;
…		…
2382	SvREFCNT_dec (old);	2963	SvREFCNT_dec (old);
2383	croak ("\3async_pool terminate\2\n");	2964	croak ("\3async_pool terminate\2\n");
2384	}	2965	}
2385		2966
2386	av_clear (GvAV (PL_defgv));	2967	av_clear (GvAV (PL_defgv));
2387	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2968	hv_store (hv, "desc", sizeof ("desc") - 1,
2388	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2969	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2389		2970
2390	coro->prio = 0;	2971	coro->prio = 0;
2391		2972
2392	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2973	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2393	api_trace (coro_current, 0);	2974	api_trace (aTHX_ coro_current, 0);
2394		2975
2395	av_push (av_async_pool, newSVsv (coro_current));	2976	av_push (av_async_pool, newSVsv (coro_current));
2396	}	2977	}
2397		2978
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 *	2979	SV *
2409	gensub (SV *sub, ...)	2980	rouse_cb ()
2410	PROTOTYPE: &;@	2981	PROTOTYPE:
2411	CODE:	2982	CODE:
2412	{	2983	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:	2984	OUTPUT:
2442	RETVAL	2985	RETVAL
2443		2986
2444	#endif
2445
2446
2447	MODULE = Coro::State PACKAGE = Coro::AIO
2448
2449	void	2987	void
2450	_get_state (SV *self)	2988	rouse_wait (SV *cb = 0)
		2989	PROTOTYPE: ;$
2451	PPCODE:	2990	PPCODE:
2452	{	2991	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		2992
2461	data->errorno = errno;
2462	data->laststype = PL_laststype;
2463	data->laststatval = PL_laststatval;
2464	data->statcache = PL_statcache;
2465		2993
2466	av_extend (av, AvFILLp (defav) + 1 + 1);	2994	MODULE = Coro::State PACKAGE = PerlIO::cede
2467		2995
2468	for (i = 0; i <= AvFILLp (defav); ++i)	2996	BOOT:
2469	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));	2997	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2470		2998
2471	av_push (av, data_sv);
2472		2999
2473	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	3000	MODULE = Coro::State PACKAGE = Coro::Semaphore
2474		3001
2475	api_ready (self);	3002	SV *
2476	}	3003	new (SV *klass, SV *count = 0)
		3004	CODE:
		3005	RETVAL = sv_bless (
		3006	coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
		3007	GvSTASH (CvGV (cv))
		3008	);
		3009	OUTPUT:
		3010	RETVAL
		3011
		3012	# helper for Coro::Channel
		3013	SV *
		3014	_alloc (int count)
		3015	CODE:
		3016	RETVAL = coro_waitarray_new (aTHX_ count);
		3017	OUTPUT:
		3018	RETVAL
		3019
		3020	SV *
		3021	count (SV *self)
		3022	CODE:
		3023	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		3024	OUTPUT:
		3025	RETVAL
2477		3026
2478	void	3027	void
2479	_set_state (SV *state)	3028	up (SV *self, int adjust = 1)
2480	PROTOTYPE: $	3029	ALIAS:
		3030	adjust = 1
		3031	CODE:
		3032	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
		3033
		3034	void
		3035	down (SV *self)
		3036	CODE:
		3037	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		3038
		3039	void
		3040	wait (SV *self)
		3041	CODE:
		3042	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
		3043
		3044	void
		3045	try (SV *self)
		3046	PPCODE:
		3047	{
		3048	AV *av = (AV *)SvRV (self);
		3049	SV *count_sv = AvARRAY (av)[0];
		3050	IV count = SvIVX (count_sv);
		3051
		3052	if (count > 0)
		3053	{
		3054	--count;
		3055	SvIVX (count_sv) = count;
		3056	XSRETURN_YES;
		3057	}
		3058	else
		3059	XSRETURN_NO;
		3060	}
		3061
		3062	void
		3063	waiters (SV *self)
		3064	PPCODE:
		3065	{
		3066	AV *av = (AV *)SvRV (self);
		3067	int wcount = AvFILLp (av) + 1 - 1;
		3068
		3069	if (GIMME_V == G_SCALAR)
		3070	XPUSHs (sv_2mortal (newSViv (wcount)));
		3071	else
		3072	{
		3073	int i;
		3074	EXTEND (SP, wcount);
		3075	for (i = 1; i <= wcount; ++i)
		3076	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
		3077	}
		3078	}
		3079
		3080	MODULE = Coro::State PACKAGE = Coro::Signal
		3081
		3082	SV *
		3083	new (SV *klass)
2481	PPCODE:	3084	CODE:
		3085	RETVAL = sv_bless (
		3086	coro_waitarray_new (aTHX_ 0),
		3087	GvSTASH (CvGV (cv))
		3088	);
		3089	OUTPUT:
		3090	RETVAL
		3091
		3092	void
		3093	wait (SV *self)
		3094	CODE:
		3095	CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
		3096
		3097	void
		3098	broadcast (SV *self)
		3099	CODE:
2482	{	3100	{
2483	AV *av = (AV *)SvRV (state);	3101	AV *av = (AV *)SvRV (self);
2484	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);	3102	coro_signal_wake (aTHX_ av, AvFILLp (av));
2485	int i;	3103	}
2486		3104
2487	errno = data->errorno;	3105	void
2488	PL_laststype = data->laststype;	3106	send (SV *self)
2489	PL_laststatval = data->laststatval;	3107	CODE:
2490	PL_statcache = data->statcache;	3108	{
		3109	AV *av = (AV *)SvRV (self);
2491		3110
2492	EXTEND (SP, AvFILLp (av));	3111	if (AvFILLp (av))
2493	for (i = 0; i < AvFILLp (av); ++i)	3112	coro_signal_wake (aTHX_ av, 1);
2494	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	3113	else
		3114	SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2495	}	3115	}
		3116
		3117	IV
		3118	awaited (SV *self)
		3119	CODE:
		3120	RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
		3121	OUTPUT:
		3122	RETVAL
2496		3123
2497		3124
2498	MODULE = Coro::State PACKAGE = Coro::AnyEvent	3125	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2499		3126
2500	BOOT:	3127	BOOT:
2501	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	3128	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2502		3129
2503	SV *	3130	void
2504	_schedule (...)	3131	_schedule (...)
2505	PROTOTYPE: @
2506	CODE:	3132	CODE:
2507	{	3133	{
2508	static int incede;	3134	static int incede;
2509		3135
2510	api_cede_notself ();	3136	api_cede_notself (aTHX);
2511		3137
2512	++incede;	3138	++incede;
2513	while (coro_nready >= incede && api_cede ())	3139	while (coro_nready >= incede && api_cede (aTHX))
2514	;	3140	;
2515		3141
2516	sv_setsv (sv_activity, &PL_sv_undef);	3142	sv_setsv (sv_activity, &PL_sv_undef);
2517	if (coro_nready >= incede)	3143	if (coro_nready >= incede)
2518	{	3144	{
2519	PUSHMARK (SP);	3145	PUSHMARK (SP);
2520	PUTBACK;	3146	PUTBACK;
2521	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);	3147	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2522	SPAGAIN;
2523	}	3148	}
2524		3149
2525	--incede;	3150	--incede;
2526	}	3151	}
2527		3152
2528		3153
2529	MODULE = Coro::State PACKAGE = PerlIO::cede	3154	MODULE = Coro::State PACKAGE = Coro::AIO
2530		3155
2531	BOOT:	3156	void
2532	PerlIO_define_layer (aTHX_ &PerlIO_cede);	3157	_register (char *target, char *proto, SV *req)
		3158	CODE:
		3159	{
		3160	HV *st;
		3161	GV *gvp;
		3162	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		3163	/* newXSproto doesn't return the CV on 5.8 */
		3164	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		3165	sv_setpv ((SV *)slf_cv, proto);
		3166	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		3167	}
2533		3168

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