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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.270 by root, Fri Nov 14 07:22:11 2008 UTC vs.
Revision 1.296 by root, Tue Nov 18 10:39:52 2008 UTC

…		…
95	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
96	#endif	96	#endif
97	#ifndef newSV	97	#ifndef newSV
98	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
99	#endif	99	#endif
		100	#ifndef CvISXSUB_on
		101	# define CvISXSUB_on(cv) (void)cv
		102	#endif
100		103
101	/* 5.8.7 */	104	/* 5.8.7 */
102	#ifndef SvRV_set	105	#ifndef SvRV_set
103	# define SvRV_set(s,v) SvRV(s) = (v)	106	# define SvRV_set(s,v) SvRV(s) = (v)
104	#endif	107	#endif
…		…
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. */
121	#if __GNUC__ >= 4	124	#if __GNUC__ >= 4
		125	# define dSTACKLEVEL int stacklevel_dummy
122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)	126	# define STACKLEVEL __builtin_frame_address (0)
123	#else	127	#else
124	# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel	128	# define dSTACKLEVEL volatile void *stacklevel
		129	# define STACKLEVEL ((void *)&stacklevel)
125	#endif	130	#endif
126		131
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	132	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		133
129	#if __GNUC__ >= 3	134	#if __GNUC__ >= 3
…		…
142	#define NOINLINE attribute ((noinline))	147	#define NOINLINE attribute ((noinline))
143		148
144	#include "CoroAPI.h"	149	#include "CoroAPI.h"
145		150
146	#ifdef USE_ITHREADS	151	#ifdef USE_ITHREADS
147
148	static perl_mutex coro_lock;
149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151	# if CORO_PTHREAD	152	# if CORO_PTHREAD
152	static void *coro_thx;	153	static void *coro_thx;
153	# endif	154	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	155	#endif
161
162	# undef LOCK
163	# define LOCK (void)0
164	# undef UNLOCK
165	# define UNLOCK (void)0
166
167	/* helper storage struct for Coro::AIO */
168	struct io_state
169	{
170	AV *res;
171	int errorno;
172	I32 laststype; /* U16 in 5.10.0 */
173	int laststatval;
174	Stat_t statcache;
175	};
176		156
177	static double (*nvtime)(); /* so why doesn't it take void? */	157	static double (*nvtime)(); /* so why doesn't it take void? */
		158
		159	/* we hijack an hopefully unused CV flag for our purposes */
		160	#define CVf_SLF 0x4000
		161	static OP *pp_slf (pTHX);
178		162
179	static U32 cctx_gen;	163	static U32 cctx_gen;
180	static size_t cctx_stacksize = CORO_STACKSIZE;	164	static size_t cctx_stacksize = CORO_STACKSIZE;
181	static struct CoroAPI coroapi;	165	static struct CoroAPI coroapi;
182	static AV *main_mainstack; /* used to differentiate between $main and others */	166	static AV *main_mainstack; /* used to differentiate between $main and others */
183	static JMPENV *main_top_env;	167	static JMPENV *main_top_env;
184	static HV *coro_state_stash, *coro_stash;	168	static HV *coro_state_stash, *coro_stash;
185	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */	169	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186	static volatile struct coro *transfer_next;
187
188	struct transfer_args
189	{
190	struct coro *prev, *next;
191	};
192		170
193	static GV *irsgv; /* $/ */	171	static GV *irsgv; /* $/ */
194	static GV *stdoutgv; /* *STDOUT */	172	static GV *stdoutgv; /* *STDOUT */
195	static SV *rv_diehook;	173	static SV *rv_diehook;
196	static SV *rv_warnhook;	174	static SV *rv_warnhook;
…		…
215	CC_TRACE_LINE = 0x10, /* trace each statement */	193	CC_TRACE_LINE = 0x10, /* trace each statement */
216	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	194	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217	};	195	};
218		196
219	/* this is a structure representing a c-level coroutine */	197	/* this is a structure representing a c-level coroutine */
220	typedef struct coro_cctx {	198	typedef struct coro_cctx
		199	{
221	struct coro_cctx *next;	200	struct coro_cctx *next;
222		201
223	/* the stack */	202	/* the stack */
224	void *sptr;	203	void *sptr;
225	size_t ssize;	204	size_t ssize;
…		…
243	CF_NEW = 0x0004, /* has never been switched to */	222	CF_NEW = 0x0004, /* has never been switched to */
244	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	223	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
245	};	224	};
246		225
247	/* the structure where most of the perl state is stored, overlaid on the cxstack */	226	/* the structure where most of the perl state is stored, overlaid on the cxstack */
248	typedef struct {	227	typedef struct
		228	{
249	SV *defsv;	229	SV *defsv;
250	AV *defav;	230	AV *defav;
251	SV *errsv;	231	SV *errsv;
252	SV *irsgv;	232	SV *irsgv;
253	#define VAR(name,type) type name;	233	#define VAR(name,type) type name;
…		…
257		237
258	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	238	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259		239
260	/* this is a structure representing a perl-level coroutine */	240	/* this is a structure representing a perl-level coroutine */
261	struct coro {	241	struct coro {
262	/* the c coroutine allocated to this perl coroutine, if any */	242	/* the C coroutine allocated to this perl coroutine, if any */
263	coro_cctx *cctx;	243	coro_cctx *cctx;
264		244
265	/* process data */	245	/* state data */
		246	struct CoroSLF slf_frame; /* saved slf frame */
266	AV *mainstack;	247	AV *mainstack;
267	perl_slots *slot; /* basically the saved sp */	248	perl_slots *slot; /* basically the saved sp */
268		249
269	AV *args; /* data associated with this coroutine (initial args) */	250	AV *args; /* data associated with this coroutine (initial args) */
270	int refcnt; /* coroutines are refcounted, yes */	251	int refcnt; /* coroutines are refcounted, yes */
271	int flags; /* CF_ flags */	252	int flags; /* CF_ flags */
272	HV *hv; /* the perl hash associated with this coro, if any */	253	HV *hv; /* the perl hash associated with this coro, if any */
		254	void (*on_destroy)(pTHX_ struct coro *coro);
273		255
274	/* statistics */	256	/* statistics */
275	int usecount; /* number of transfers to this coro */	257	int usecount; /* number of transfers to this coro */
276		258
277	/* coro process data */	259	/* coro process data */
…		…
285	struct coro *next, *prev;	267	struct coro *next, *prev;
286	};	268	};
287		269
288	typedef struct coro *Coro__State;	270	typedef struct coro *Coro__State;
289	typedef struct coro *Coro__State_or_hashref;	271	typedef struct coro *Coro__State_or_hashref;
		272
		273	/* the following variables are effectively part of the perl context */
		274	/* and get copied between struct coro and these variables */
		275	/* the mainr easonw e don't support windows process emulation */
		276	static struct CoroSLF slf_frame; /* the current slf frame */
		277	static SV *coro_throw;
290		278
291	/** Coro ********************************************************************/	279	/** Coro ********************************************************************/
292		280
293	#define PRIO_MAX 3	281	#define PRIO_MAX 3
294	#define PRIO_HIGH 1	282	#define PRIO_HIGH 1
…		…
395	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	383	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396		384
397	return 0;	385	return 0;
398	}	386	}
399		387
400	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	388	#define CORO_MAGIC_type_cv 26
401	#define CORO_MAGIC_type_state PERL_MAGIC_ext	389	#define CORO_MAGIC_type_state PERL_MAGIC_ext
402		390
403	static MGVTBL coro_cv_vtbl = {	391	static MGVTBL coro_cv_vtbl = {
404	0, 0, 0, 0,	392	0, 0, 0, 0,
405	coro_cv_free	393	coro_cv_free
406	};	394	};
407		395
		396	#define CORO_MAGIC_NN(sv, type) \
		397	(expect_true (SvMAGIC (sv)->mg_type == type) \
		398	? SvMAGIC (sv) \
		399	: mg_find (sv, type))
		400
408	#define CORO_MAGIC(sv, type) \	401	#define CORO_MAGIC(sv, type) \
409	SvMAGIC (sv) \	402	(expect_true (SvMAGIC (sv)) \
410	? SvMAGIC (sv)->mg_type == type \	403	? CORO_MAGIC_NN (sv, type) \
411	? SvMAGIC (sv) \
412	: mg_find (sv, type) \
413	: 0	404	: 0)
414		405
415	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	406	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	407	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
417		408
418	INLINE struct coro *	409	INLINE struct coro *
419	SvSTATE_ (pTHX_ SV *coro)	410	SvSTATE_ (pTHX_ SV *coro)
420	{	411	{
421	HV *stash;	412	HV *stash;
…		…
438	mg = CORO_MAGIC_state (coro);	429	mg = CORO_MAGIC_state (coro);
439	return (struct coro *)mg->mg_ptr;	430	return (struct coro *)mg->mg_ptr;
440	}	431	}
441		432
442	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	433	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		434
		435	/* faster than SvSTATE, but expects a coroutine hv */
		436	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		437	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443		438
444	/* the next two functions merely cache the padlists */	439	/* the next two functions merely cache the padlists */
445	static void	440	static void
446	get_padlist (pTHX_ CV *cv)	441	get_padlist (pTHX_ CV *cv)
447	{	442	{
…		…
514	CvPADLIST (cv) = (AV *)POPs;	509	CvPADLIST (cv) = (AV *)POPs;
515	}	510	}
516		511
517	PUTBACK;	512	PUTBACK;
518	}	513	}
		514
		515	slf_frame = c->slf_frame;
		516	coro_throw = c->throw;
519	}	517	}
520		518
521	static void	519	static void
522	save_perl (pTHX_ Coro__State c)	520	save_perl (pTHX_ Coro__State c)
523	{	521	{
		522	c->throw = coro_throw;
		523	c->slf_frame = slf_frame;
		524
524	{	525	{
525	dSP;	526	dSP;
526	I32 cxix = cxstack_ix;	527	I32 cxix = cxstack_ix;
527	PERL_CONTEXT *ccstk = cxstack;	528	PERL_CONTEXT *ccstk = cxstack;
528	PERL_SI *top_si = PL_curstackinfo;	529	PERL_SI *top_si = PL_curstackinfo;
…		…
595	#undef VAR	596	#undef VAR
596	}	597	}
597	}	598	}
598		599
599	/*	600	/*
600	* allocate various perl stacks. This is an exact copy	601	* allocate various perl stacks. This is almost an exact copy
601	* of perl.c:init_stacks, except that it uses less memory	602	* of perl.c:init_stacks, except that it uses less memory
602	* on the (sometimes correct) assumption that coroutines do	603	* on the (sometimes correct) assumption that coroutines do
603	* not usually need a lot of stackspace.	604	* not usually need a lot of stackspace.
604	*/	605	*/
605	#if CORO_PREFER_PERL_FUNCTIONS	606	#if CORO_PREFER_PERL_FUNCTIONS
…		…
712	#endif	713	#endif
713	}	714	}
714	}	715	}
715		716
716	return rss;	717	return rss;
717	}
718
719	/** set stacklevel support **************************************************/
720
721	/* we sometimes need to create the effect of pp_slf calling us */
722	#define SLF_HEAD (void)0
723	/* we sometimes need to create the effect of leaving via pp_slf */
724	#define SLF_TAIL slf_tail (aTHX)
725
726	INLINE void
727	slf_tail (pTHX)
728	{
729	dSP;
730	SV **bot = SP;
731
732	int gimme = GIMME_V;
733
734	/* make sure we put something on the stack in scalar context */
735	if (gimme == G_SCALAR)
736	{
737	if (sp == bot)
738	XPUSHs (&PL_sv_undef);
739
740	SP = bot + 1;
741	}
742
743	PUTBACK;
744	}	718	}
745		719
746	/** coroutine stack handling ************************************************/	720	/** coroutine stack handling ************************************************/
747		721
748	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);	722	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
…		…
834		808
835	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	809	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836	}	810	}
837		811
838	static void	812	static void
		813	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		814	{
		815	/* kind of mega-hacky, but works */
		816	ta->next = ta->prev = (struct coro *)ta;
		817	}
		818
		819	static int
		820	slf_check_nop (pTHX_ struct CoroSLF *frame)
		821	{
		822	return 0;
		823	}
		824
		825	static UNOP coro_setup_op;
		826
		827	static void NOINLINE /* noinline to keep it out of the transfer fast path */
839	coro_setup (pTHX_ struct coro *coro)	828	coro_setup (pTHX_ struct coro *coro)
840	{	829	{
841	/*	830	/*
842	* emulate part of the perl startup here.	831	* emulate part of the perl startup here.
843	*/	832	*/
…		…
870	{	859	{
871	dSP;	860	dSP;
872	UNOP myop;	861	UNOP myop;
873		862
874	Zero (&myop, 1, UNOP);	863	Zero (&myop, 1, UNOP);
875	myop.op_next = Nullop;	864	myop.op_next = Nullop;
876	myop.op_flags = OPf_WANT_VOID;	865	myop.op_flags = OPf_WANT_VOID;
877		866
878	PUSHMARK (SP);	867	PUSHMARK (SP);
879	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	868	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
880	PUTBACK;	869	PUTBACK;
…		…
882	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	871	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883	SPAGAIN;	872	SPAGAIN;
884	}	873	}
885		874
886	/* this newly created coroutine might be run on an existing cctx which most	875	/* this newly created coroutine might be run on an existing cctx which most
887	* likely was suspended in set_stacklevel, called from pp_set_stacklevel,	876	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888	* so we have to emulate entering pp_set_stacklevel here.
889	*/	877	*/
890	SLF_HEAD;	878	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		879	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		880
		881	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		882	coro_setup_op.op_next = PL_op;
		883	coro_setup_op.op_type = OP_CUSTOM;
		884	coro_setup_op.op_ppaddr = pp_slf;
		885	/* no flags required, as an init function won't be called */
		886
		887	PL_op = (OP *)&coro_setup_op;
		888
		889	/* copy throw, in case it was set before coro_setup */
		890	coro_throw = coro->throw;
891	}	891	}
892		892
893	static void	893	static void
894	coro_destruct (pTHX_ struct coro *coro)	894	coro_destruct (pTHX_ struct coro *coro)
895	{	895	{
…		…
919		919
920	SvREFCNT_dec (PL_diehook);	920	SvREFCNT_dec (PL_diehook);
921	SvREFCNT_dec (PL_warnhook);	921	SvREFCNT_dec (PL_warnhook);
922		922
923	SvREFCNT_dec (coro->saved_deffh);	923	SvREFCNT_dec (coro->saved_deffh);
924	SvREFCNT_dec (coro->throw);	924	SvREFCNT_dec (coro_throw);
925		925
926	coro_destruct_stacks (aTHX);	926	coro_destruct_stacks (aTHX);
927	}	927	}
928		928
929	INLINE void	929	INLINE void
…		…
939	static int	939	static int
940	runops_trace (pTHX)	940	runops_trace (pTHX)
941	{	941	{
942	COP *oldcop = 0;	942	COP *oldcop = 0;
943	int oldcxix = -2;	943	int oldcxix = -2;
944	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	944	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
945	coro_cctx *cctx = coro->cctx;	945	coro_cctx *cctx = coro->cctx;
946		946
947	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	947	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948	{	948	{
949	PERL_ASYNC_CHECK ();	949	PERL_ASYNC_CHECK ();
…		…
1058		1058
1059	TAINT_NOT;	1059	TAINT_NOT;
1060	return 0;	1060	return 0;
1061	}	1061	}
1062		1062
		1063	static struct coro_cctx *cctx_ssl_cctx;
		1064	static struct CoroSLF cctx_ssl_frame;
		1065
1063	static void	1066	static void
1064	prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)	1067	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1065	{	1068	{
1066	ta->prev = (struct coro *)cctx;	1069	ta->prev = (struct coro *)cctx_ssl_cctx;
1067	ta->next = 0;	1070	ta->next = 0;
1068	}	1071	}
1069		1072
1070	/* inject a fake call to Coro::State::_cctx_init into the execution */	1073	static int
1071	/* _cctx_init should be careful, as it could be called at almost any time */	1074	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1072	/* during execution of a perl program */	1075	{
1073	/* also initialises PL_top_env */	1076	*frame = cctx_ssl_frame;
		1077
		1078	return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
		1079	}
		1080
		1081	/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1074	static void NOINLINE	1082	static void NOINLINE
1075	cctx_prepare (pTHX_ coro_cctx *cctx)	1083	cctx_prepare (pTHX_ coro_cctx *cctx)
1076	{	1084	{
1077	dSP;
1078	UNOP myop;
1079
1080	PL_top_env = &PL_start_env;	1085	PL_top_env = &PL_start_env;
1081		1086
1082	if (cctx->flags & CC_TRACE)	1087	if (cctx->flags & CC_TRACE)
1083	PL_runops = runops_trace;	1088	PL_runops = runops_trace;
1084		1089
1085	Zero (&myop, 1, UNOP);	1090	/* we already must be executing an SLF op, there is no other valid way
1086	myop.op_next = PL_op;	1091	* that can lead to creation of a new cctx */
1087	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1092	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1093	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1088		1094
1089	PUSHMARK (SP);	1095	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1090	EXTEND (SP, 2);	1096	cctx_ssl_cctx = cctx;
1091	PUSHs (sv_2mortal (newSViv ((IV)cctx)));	1097	cctx_ssl_frame = slf_frame;
1092	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1098
1093	PUTBACK;	1099	slf_frame.prepare = slf_prepare_set_stacklevel;
1094	PL_op = (OP *)&myop;	1100	slf_frame.check = slf_check_set_stacklevel;
1095	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1096	SPAGAIN;
1097	}	1101	}
1098		1102
1099	/* the tail of transfer: execute stuff we can only do after a transfer */	1103	/* the tail of transfer: execute stuff we can only do after a transfer */
1100	INLINE void	1104	INLINE void
1101	transfer_tail (pTHX)	1105	transfer_tail (pTHX)
1102	{	1106	{
1103	struct coro *next = (struct coro *)transfer_next;
1104	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107	free_coro_mortal (aTHX);	1107	free_coro_mortal (aTHX);
1108	UNLOCK;
1109
1110	if (expect_false (next->throw))
1111	{
1112	SV *exception = sv_2mortal (next->throw);
1113
1114	next->throw = 0;
1115	sv_setsv (ERRSV, exception);
1116	croak (0);
1117	}
1118	}	1108	}
1119		1109
1120	/*	1110	/*
1121	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1122	*/	1112	*/
…		…
1129	# endif	1119	# endif
1130	#endif	1120	#endif
1131	{	1121	{
1132	dTHX;	1122	dTHX;
1133		1123
1134	/* we are the alternative tail to pp_set_stacklevel */	1124	/* normally we would need to skip the entersub here */
1135	/* so do the same things here */	1125	/* not doing so will re-execute it, which is exactly what we want */
1136	SLF_TAIL;
1137
1138	/* we now skip the op that did lead to transfer() */
1139	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
1140		1127
1141	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1142	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1143		1130
1144	/* cctx_run is the alternative tail of transfer() */	1131	/* cctx_run is the alternative tail of transfer() */
…		…
1305	/** coroutine switching *****************************************************/	1292	/** coroutine switching *****************************************************/
1306		1293
1307	static void	1294	static void
1308	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1295	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309	{	1296	{
		1297	/* TODO: throwing up here is considered harmful */
		1298
1310	if (expect_true (prev != next))	1299	if (expect_true (prev != next))
1311	{	1300	{
1312	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1301	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1302	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1314		1303
1315	if (expect_false (next->flags & CF_RUNNING))	1304	if (expect_false (next->flags & CF_RUNNING))
1316	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1305	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1317		1306
1318	if (expect_false (next->flags & CF_DESTROYED))	1307	if (expect_false (next->flags & CF_DESTROYED))
1319	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1308	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1320		1309
1321	#if !PERL_VERSION_ATLEAST (5,10,0)	1310	#if !PERL_VERSION_ATLEAST (5,10,0)
1322	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1311	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1312	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1324	#endif	1313	#endif
1325	}	1314	}
1326	}	1315	}
1327		1316
1328	/* always use the TRANSFER macro */	1317	/* always use the TRANSFER macro */
1329	static void NOINLINE	1318	static void NOINLINE /* noinline so we have a fixed stackframe */
1330	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1319	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1331	{	1320	{
1332	dSTACKLEVEL;	1321	dSTACKLEVEL;
1333		1322
1334	/* sometimes transfer is only called to set idle_sp */	1323	/* sometimes transfer is only called to set idle_sp */
1335	if (expect_false (!next))	1324	if (expect_false (!next))
1336	{	1325	{
1337	((coro_cctx *)prev)->idle_sp = stacklevel;	1326	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1338	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1327	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1339	}	1328	}
1340	else if (expect_true (prev != next))	1329	else if (expect_true (prev != next))
1341	{	1330	{
1342	coro_cctx *prev__cctx;	1331	coro_cctx *prev__cctx;
…		…
1349	prev->flags |= CF_RUNNING;	1338	prev->flags |= CF_RUNNING;
1350	}	1339	}
1351		1340
1352	prev->flags &= ~CF_RUNNING;	1341	prev->flags &= ~CF_RUNNING;
1353	next->flags |= CF_RUNNING;	1342	next->flags |= CF_RUNNING;
1354
1355	LOCK;
1356		1343
1357	/* first get rid of the old state */	1344	/* first get rid of the old state */
1358	save_perl (aTHX_ prev);	1345	save_perl (aTHX_ prev);
1359		1346
1360	if (expect_false (next->flags & CF_NEW))	1347	if (expect_false (next->flags & CF_NEW))
…		…
1369		1356
1370	prev__cctx = prev->cctx;	1357	prev__cctx = prev->cctx;
1371		1358
1372	/* possibly untie and reuse the cctx */	1359	/* possibly untie and reuse the cctx */
1373	if (expect_true (	1360	if (expect_true (
1374	prev__cctx->idle_sp == stacklevel	1361	prev__cctx->idle_sp == STACKLEVEL
1375	&& !(prev__cctx->flags & CC_TRACE)	1362	&& !(prev__cctx->flags & CC_TRACE)
1376	&& !force_cctx	1363	&& !force_cctx
1377	))	1364	))
1378	{	1365	{
1379	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */	1366	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
…		…
1393	++next->usecount;	1380	++next->usecount;
1394		1381
1395	if (expect_true (!next->cctx))	1382	if (expect_true (!next->cctx))
1396	next->cctx = cctx_get (aTHX);	1383	next->cctx = cctx_get (aTHX);
1397		1384
1398	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399	transfer_next = next;
1400
1401	if (expect_false (prev__cctx != next->cctx))	1385	if (expect_false (prev__cctx != next->cctx))
1402	{	1386	{
1403	prev__cctx->top_env = PL_top_env;	1387	prev__cctx->top_env = PL_top_env;
1404	PL_top_env = next->cctx->top_env;	1388	PL_top_env = next->cctx->top_env;
1405	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1389	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
…		…
1418	coro_state_destroy (pTHX_ struct coro *coro)	1402	coro_state_destroy (pTHX_ struct coro *coro)
1419	{	1403	{
1420	if (coro->flags & CF_DESTROYED)	1404	if (coro->flags & CF_DESTROYED)
1421	return 0;	1405	return 0;
1422		1406
		1407	if (coro->on_destroy)
		1408	coro->on_destroy (aTHX_ coro);
		1409
1423	coro->flags |= CF_DESTROYED;	1410	coro->flags |= CF_DESTROYED;
1424		1411
1425	if (coro->flags & CF_READY)	1412	if (coro->flags & CF_READY)
1426	{	1413	{
1427	/* reduce nready, as destroying a ready coro effectively unreadies it */	1414	/* reduce nready, as destroying a ready coro effectively unreadies it */
1428	/* alternative: look through all ready queues and remove the coro */	1415	/* alternative: look through all ready queues and remove the coro */
1429	LOCK;
1430	--coro_nready;	1416	--coro_nready;
1431	UNLOCK;
1432	}	1417	}
1433	else	1418	else
1434	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1419	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1435		1420
1436	if (coro->mainstack && coro->mainstack != main_mainstack)	1421	if (coro->mainstack && coro->mainstack != main_mainstack)
1437	{	1422	{
1438	struct coro temp;	1423	struct coro temp;
1439		1424
1440	if (coro->flags & CF_RUNNING)	1425	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1441	croak ("FATAL: tried to destroy currently running coroutine");
1442		1426
1443	save_perl (aTHX_ &temp);	1427	save_perl (aTHX_ &temp);
1444	load_perl (aTHX_ coro);	1428	load_perl (aTHX_ coro);
1445		1429
1446	coro_destruct (aTHX_ coro);	1430	coro_destruct (aTHX_ coro);
…		…
1497	# define MGf_DUP 0	1481	# define MGf_DUP 0
1498	#endif	1482	#endif
1499	};	1483	};
1500		1484
1501	static void	1485	static void
1502	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1486	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1503	{	1487	{
1504	ta->prev = SvSTATE (prev_sv);	1488	ta->prev = SvSTATE (prev_sv);
1505	ta->next = SvSTATE (next_sv);	1489	ta->next = SvSTATE (next_sv);
1506	TRANSFER_CHECK (*ta);	1490	TRANSFER_CHECK (*ta);
1507	}	1491	}
1508		1492
1509	static void	1493	static void
1510	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)	1494	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1511	{	1495	{
1512	struct transfer_args ta;	1496	struct coro_transfer_args ta;
1513		1497
1514	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1498	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1515	TRANSFER (ta, 1);	1499	TRANSFER (ta, 1);
1516	}	1500	}
1517		1501
1518	/** Coro ********************************************************************/	1502	/** Coro ********************************************************************/
1519		1503
1520	static void	1504	INLINE void
1521	coro_enq (pTHX_ SV *coro_sv)	1505	coro_enq (pTHX_ struct coro *coro)
1522	{	1506	{
1523	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1507	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1524	}	1508	}
1525		1509
1526	static SV *	1510	INLINE SV *
1527	coro_deq (pTHX)	1511	coro_deq (pTHX)
1528	{	1512	{
1529	int prio;	1513	int prio;
1530		1514
1531	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1515	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1550	if (coro->flags & CF_READY)	1534	if (coro->flags & CF_READY)
1551	return 0;	1535	return 0;
1552		1536
1553	coro->flags |= CF_READY;	1537	coro->flags |= CF_READY;
1554		1538
1555	LOCK;
1556
1557	sv_hook = coro_nready ? 0 : coro_readyhook;	1539	sv_hook = coro_nready ? 0 : coro_readyhook;
1558	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1540	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1559		1541
1560	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1542	coro_enq (aTHX_ coro);
1561	++coro_nready;	1543	++coro_nready;
1562		1544
1563	UNLOCK;
1564
1565	if (sv_hook)	1545	if (sv_hook)
1566	{	1546	{
1567	dSP;	1547	dSP;
1568		1548
1569	ENTER;	1549	ENTER;
1570	SAVETMPS;	1550	SAVETMPS;
1571		1551
1572	PUSHMARK (SP);	1552	PUSHMARK (SP);
1573	PUTBACK;	1553	PUTBACK;
1574	call_sv (sv_hook, G_DISCARD);	1554	call_sv (sv_hook, G_VOID | G_DISCARD);
1575	SPAGAIN;
1576		1555
1577	FREETMPS;	1556	FREETMPS;
1578	LEAVE;	1557	LEAVE;
1579	}	1558	}
1580		1559
…		…
1589	{	1568	{
1590	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1569	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1591	}	1570	}
1592		1571
1593	INLINE void	1572	INLINE void
1594	prepare_schedule (pTHX_ struct transfer_args *ta)	1573	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1595	{	1574	{
1596	SV *prev_sv, *next_sv;	1575	SV *prev_sv, *next_sv;
1597		1576
1598	for (;;)	1577	for (;;)
1599	{	1578	{
1600	LOCK;
1601	next_sv = coro_deq (aTHX);	1579	next_sv = coro_deq (aTHX);
1602		1580
1603	/* nothing to schedule: call the idle handler */	1581	/* nothing to schedule: call the idle handler */
1604	if (expect_false (!next_sv))	1582	if (expect_false (!next_sv))
1605	{	1583	{
1606	dSP;	1584	dSP;
1607	UNLOCK;
1608		1585
1609	ENTER;	1586	ENTER;
1610	SAVETMPS;	1587	SAVETMPS;
1611		1588
1612	PUSHMARK (SP);	1589	PUSHMARK (SP);
1613	PUTBACK;	1590	PUTBACK;
1614	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1591	call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1615	SPAGAIN;
1616		1592
1617	FREETMPS;	1593	FREETMPS;
1618	LEAVE;	1594	LEAVE;
1619	continue;	1595	continue;
1620	}	1596	}
1621		1597
1622	ta->next = SvSTATE (next_sv);	1598	ta->next = SvSTATE_hv (next_sv);
1623		1599
1624	/* cannot transfer to destroyed coros, skip and look for next */	1600	/* cannot transfer to destroyed coros, skip and look for next */
1625	if (expect_false (ta->next->flags & CF_DESTROYED))	1601	if (expect_false (ta->next->flags & CF_DESTROYED))
1626	{	1602	{
1627	UNLOCK;
1628	SvREFCNT_dec (next_sv);	1603	SvREFCNT_dec (next_sv);
1629	/* coro_nready has already been taken care of by destroy */	1604	/* coro_nready has already been taken care of by destroy */
1630	continue;	1605	continue;
1631	}	1606	}
1632		1607
1633	--coro_nready;	1608	--coro_nready;
1634	UNLOCK;
1635	break;	1609	break;
1636	}	1610	}
1637		1611
1638	/* free this only after the transfer */	1612	/* free this only after the transfer */
1639	prev_sv = SvRV (coro_current);	1613	prev_sv = SvRV (coro_current);
1640	ta->prev = SvSTATE (prev_sv);	1614	ta->prev = SvSTATE_hv (prev_sv);
1641	TRANSFER_CHECK (*ta);	1615	TRANSFER_CHECK (*ta);
1642	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1616	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1643	ta->next->flags &= ~CF_READY;	1617	ta->next->flags &= ~CF_READY;
1644	SvRV_set (coro_current, next_sv);	1618	SvRV_set (coro_current, next_sv);
1645		1619
1646	LOCK;
1647	free_coro_mortal (aTHX);	1620	free_coro_mortal (aTHX);
1648	coro_mortal = prev_sv;	1621	coro_mortal = prev_sv;
1649	UNLOCK;
1650	}	1622	}
1651		1623
1652	INLINE void	1624	INLINE void
1653	prepare_cede (pTHX_ struct transfer_args *ta)	1625	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1654	{	1626	{
1655	api_ready (aTHX_ coro_current);	1627	api_ready (aTHX_ coro_current);
1656	prepare_schedule (aTHX_ ta);	1628	prepare_schedule (aTHX_ ta);
1657	}	1629	}
1658		1630
1659	static void	1631	INLINE void
1660	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1632	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1661	{	1633	{
1662	SV *prev = SvRV (coro_current);	1634	SV *prev = SvRV (coro_current);
1663		1635
1664	if (coro_nready)	1636	if (coro_nready)
1665	{	1637	{
1666	prepare_schedule (aTHX_ ta);	1638	prepare_schedule (aTHX_ ta);
1667	api_ready (aTHX_ prev);	1639	api_ready (aTHX_ prev);
1668	}	1640	}
1669	else	1641	else
1670	ta->prev = ta->next = SvSTATE (prev);	1642	prepare_nop (aTHX_ ta);
1671	}	1643	}
1672		1644
1673	static void	1645	static void
1674	api_schedule (pTHX)	1646	api_schedule (pTHX)
1675	{	1647	{
1676	struct transfer_args ta;	1648	struct coro_transfer_args ta;
1677		1649
1678	prepare_schedule (aTHX_ &ta);	1650	prepare_schedule (aTHX_ &ta);
1679	TRANSFER (ta, 1);	1651	TRANSFER (ta, 1);
1680	}	1652	}
1681		1653
1682	static int	1654	static int
1683	api_cede (pTHX)	1655	api_cede (pTHX)
1684	{	1656	{
1685	struct transfer_args ta;	1657	struct coro_transfer_args ta;
1686		1658
1687	prepare_cede (aTHX_ &ta);	1659	prepare_cede (aTHX_ &ta);
1688		1660
1689	if (expect_true (ta.prev != ta.next))	1661	if (expect_true (ta.prev != ta.next))
1690	{	1662	{
…		…
1698	static int	1670	static int
1699	api_cede_notself (pTHX)	1671	api_cede_notself (pTHX)
1700	{	1672	{
1701	if (coro_nready)	1673	if (coro_nready)
1702	{	1674	{
1703	struct transfer_args ta;	1675	struct coro_transfer_args ta;
1704		1676
1705	prepare_cede_notself (aTHX_ &ta);	1677	prepare_cede_notself (aTHX_ &ta);
1706	TRANSFER (ta, 1);	1678	TRANSFER (ta, 1);
1707	return 1;	1679	return 1;
1708	}	1680	}
…		…
1718	if (flags & CC_TRACE)	1690	if (flags & CC_TRACE)
1719	{	1691	{
1720	if (!coro->cctx)	1692	if (!coro->cctx)
1721	coro->cctx = cctx_new_run ();	1693	coro->cctx = cctx_new_run ();
1722	else if (!(coro->cctx->flags & CC_TRACE))	1694	else if (!(coro->cctx->flags & CC_TRACE))
1723	croak ("cannot enable tracing on coroutine with custom stack");	1695	croak ("cannot enable tracing on coroutine with custom stack,");
1724		1696
1725	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1697	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1726	}	1698	}
1727	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1699	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1728	{	1700	{
…		…
1733	else	1705	else
1734	coro->slot->runops = RUNOPS_DEFAULT;	1706	coro->slot->runops = RUNOPS_DEFAULT;
1735	}	1707	}
1736	}	1708	}
1737		1709
1738	#if 0	1710	/*****************************************************************************/
		1711	/* schedule-like-function opcode (SLF) */
		1712
		1713	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1714	static const CV *slf_cv;
		1715	static SV **slf_argv;
		1716	static int slf_argc, slf_arga; /* count, allocated */
		1717	static I32 slf_ax; /* top of stack, for restore */
		1718
		1719	/* this restores the stack in the case we patched the entersub, to */
		1720	/* recreate the stack frame as perl will on following calls */
		1721	/* since entersub cleared the stack */
		1722	static OP *
		1723	pp_restore (pTHX)
		1724	{
		1725	int i;
		1726	SV **SP = PL_stack_base + slf_ax;
		1727
		1728	PUSHMARK (SP);
		1729
		1730	EXTEND (SP, slf_argc + 1);
		1731
		1732	for (i = 0; i < slf_argc; ++i)
		1733	PUSHs (sv_2mortal (slf_argv [i]));
		1734
		1735	PUSHs ((SV *)CvGV (slf_cv));
		1736
		1737	RETURNOP (slf_restore.op_first);
		1738	}
		1739
1739	static int	1740	static void
1740	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1741	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1741	{	1742	{
1742	AV *padlist;	1743	SV **arg = (SV **)slf_frame.data;
1743	AV *av = (AV *)mg->mg_obj;
1744		1744
1745	abort ();	1745	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746
1747	return 0;
1748	}	1746	}
1749		1747
1750	static MGVTBL coro_gensub_vtbl = {	1748	static void
1751	0, 0, 0, 0,	1749	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1752	coro_gensub_free	1750	{
1753	};	1751	if (items != 2)
1754	#endif	1752	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1753
		1754	frame->prepare = slf_prepare_transfer;
		1755	frame->check = slf_check_nop;
		1756	frame->data = (void *)arg; /* let's hope it will stay valid */
		1757	}
		1758
		1759	static void
		1760	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1761	{
		1762	frame->prepare = prepare_schedule;
		1763	frame->check = slf_check_nop;
		1764	}
		1765
		1766	static void
		1767	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1768	{
		1769	frame->prepare = prepare_cede;
		1770	frame->check = slf_check_nop;
		1771	}
		1772
		1773	static void
		1774	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1775	{
		1776	frame->prepare = prepare_cede_notself;
		1777	frame->check = slf_check_nop;
		1778	}
		1779
		1780	/*
		1781	* these not obviously related functions are all rolled into one
		1782	* function to increase chances that they all will call transfer with the same
		1783	* stack offset
		1784	* SLF stands for "schedule-like-function".
		1785	*/
		1786	static OP *
		1787	pp_slf (pTHX)
		1788	{
		1789	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1790
		1791	/* set up the slf frame, unless it has already been set-up */
		1792	/* the latter happens when a new coro has been started */
		1793	/* or when a new cctx was attached to an existing coroutine */
		1794	if (expect_true (!slf_frame.prepare))
		1795	{
		1796	/* first iteration */
		1797	dSP;
		1798	SV **arg = PL_stack_base + TOPMARK + 1;
		1799	int items = SP - arg; /* args without function object */
		1800	SV *gv = *sp;
		1801
		1802	/* do a quick consistency check on the "function" object, and if it isn't */
		1803	/* for us, divert to the real entersub */
		1804	if (SvTYPE (gv) != SVt_PVGV
		1805	|| !GvCV (gv)
		1806	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1807	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1808
		1809	if (!(PL_op->op_flags & OPf_STACKED))
		1810	{
		1811	/* ampersand-form of call, use @_ instead of stack */
		1812	AV *av = GvAV (PL_defgv);
		1813	arg = AvARRAY (av);
		1814	items = AvFILLp (av) + 1;
		1815	}
		1816
		1817	/* now call the init function, which needs to set up slf_frame */
		1818	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1819	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1820
		1821	/* pop args */
		1822	SP = PL_stack_base + POPMARK;
		1823
		1824	PUTBACK;
		1825	}
		1826
		1827	/* now that we have a slf_frame, interpret it! */
		1828	/* we use a callback system not to make the code needlessly */
		1829	/* complicated, but so we can run multiple perl coros from one cctx */
		1830
		1831	do
		1832	{
		1833	struct coro_transfer_args ta;
		1834
		1835	slf_frame.prepare (aTHX_ &ta);
		1836	TRANSFER (ta, 0);
		1837
		1838	checkmark = PL_stack_sp - PL_stack_base;
		1839	}
		1840	while (slf_frame.check (aTHX_ &slf_frame));
		1841
		1842	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1843
		1844	/* exception handling */
		1845	if (expect_false (coro_throw))
		1846	{
		1847	SV *exception = sv_2mortal (coro_throw);
		1848
		1849	coro_throw = 0;
		1850	sv_setsv (ERRSV, exception);
		1851	croak (0);
		1852	}
		1853
		1854	/* return value handling - mostly like entersub */
		1855	/* make sure we put something on the stack in scalar context */
		1856	if (GIMME_V == G_SCALAR)
		1857	{
		1858	dSP;
		1859	SV **bot = PL_stack_base + checkmark;
		1860
		1861	if (sp == bot) /* too few, push undef */
		1862	bot [1] = &PL_sv_undef;
		1863	else if (sp != bot + 1) /* too many, take last one */
		1864	bot [1] = *sp;
		1865
		1866	SP = bot + 1;
		1867
		1868	PUTBACK;
		1869	}
		1870
		1871	return NORMAL;
		1872	}
		1873
		1874	static void
		1875	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1876	{
		1877	int i;
		1878	SV **arg = PL_stack_base + ax;
		1879	int items = PL_stack_sp - arg + 1;
		1880
		1881	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1882
		1883	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1884	&& PL_op->op_ppaddr != pp_slf)
		1885	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1886
		1887	CvFLAGS (cv) |= CVf_SLF;
		1888	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1889	slf_cv = cv;
		1890
		1891	/* we patch the op, and then re-run the whole call */
		1892	/* we have to put the same argument on the stack for this to work */
		1893	/* and this will be done by pp_restore */
		1894	slf_restore.op_next = (OP *)&slf_restore;
		1895	slf_restore.op_type = OP_CUSTOM;
		1896	slf_restore.op_ppaddr = pp_restore;
		1897	slf_restore.op_first = PL_op;
		1898
		1899	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1900
		1901	if (PL_op->op_flags & OPf_STACKED)
		1902	{
		1903	if (items > slf_arga)
		1904	{
		1905	slf_arga = items;
		1906	free (slf_argv);
		1907	slf_argv = malloc (slf_arga * sizeof (SV *));
		1908	}
		1909
		1910	slf_argc = items;
		1911
		1912	for (i = 0; i < items; ++i)
		1913	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1914	}
		1915	else
		1916	slf_argc = 0;
		1917
		1918	PL_op->op_ppaddr = pp_slf;
		1919	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1920
		1921	PL_op = (OP *)&slf_restore;
		1922	}
1755		1923
1756	/*****************************************************************************/	1924	/*****************************************************************************/
1757	/* PerlIO::cede */	1925	/* PerlIO::cede */
1758		1926
1759	typedef struct	1927	typedef struct
…		…
1827	PerlIOBuf_get_cnt,	1995	PerlIOBuf_get_cnt,
1828	PerlIOBuf_set_ptrcnt,	1996	PerlIOBuf_set_ptrcnt,
1829	};	1997	};
1830		1998
1831	/*****************************************************************************/	1999	/*****************************************************************************/
		2000	/* Coro::Semaphore */
1832		2001
1833	static const CV *slf_cv; /* for quick consistency check */	2002	static void
		2003	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2004	{
		2005	SV *count_sv = AvARRAY (av)[0];
		2006	IV count = SvIVX (count_sv);
1834		2007
1835	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */	2008	count += adjust;
1836	static SV *slf_arg0;	2009	SvIVX (count_sv) = count;
1837	static SV *slf_arg1;
1838		2010
1839	/* this restores the stack in the case we patched the entersub, to */	2011	/* now wake up as many waiters as are expected to lock */
1840	/* recreate the stack frame as perl will on following calls */	2012	while (count > 0 && AvFILLp (av) > 0)
1841	/* since entersub cleared the stack */	2013	{
		2014	SV *cb;
		2015
		2016	/* swap first two elements so we can shift a waiter */
		2017	AvARRAY (av)[0] = AvARRAY (av)[1];
		2018	AvARRAY (av)[1] = count_sv;
		2019	cb = av_shift (av);
		2020
		2021	if (SvOBJECT (cb))
		2022	api_ready (aTHX_ cb);
		2023	else
		2024	croak ("callbacks not yet supported");
		2025
		2026	SvREFCNT_dec (cb);
		2027
		2028	--count;
		2029	}
		2030	}
		2031
		2032	static void
		2033	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2034	{
		2035	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2036	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2037	}
		2038
		2039	static int
		2040	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2041	{
		2042	AV *av = (AV *)frame->data;
		2043	SV *count_sv = AvARRAY (av)[0];
		2044
		2045	/* if we are about to throw, don't actually acquire the lock, just throw */
		2046	if (coro_throw)
		2047	return 0;
		2048	else if (SvIVX (count_sv) > 0)
		2049	{
		2050	SvSTATE_current->on_destroy = 0;
		2051	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2052	return 0;
		2053	}
		2054	else
		2055	{
		2056	int i;
		2057	/* if we were woken up but can't down, we look through the whole */
		2058	/* waiters list and only add us if we aren't in there already */
		2059	/* this avoids some degenerate memory usage cases */
		2060
		2061	for (i = 1; i <= AvFILLp (av); ++i)
		2062	if (AvARRAY (av)[i] == SvRV (coro_current))
		2063	return 1;
		2064
		2065	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2066	return 1;
		2067	}
		2068	}
		2069
		2070	static void
		2071	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2072	{
		2073	AV *av = (AV *)SvRV (arg [0]);
		2074
		2075	if (SvIVX (AvARRAY (av)[0]) > 0)
		2076	{
		2077	frame->data = (void *)av;
		2078	frame->prepare = prepare_nop;
		2079	}
		2080	else
		2081	{
		2082	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2083
		2084	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2085	frame->prepare = prepare_schedule;
		2086
		2087	/* to avoid race conditions when a woken-up coro gets terminated */
		2088	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2089	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2090	}
		2091
		2092	frame->check = slf_check_semaphore_down;
		2093
		2094	}
		2095
		2096	/*****************************************************************************/
		2097	/* gensub: simple closure generation utility */
		2098
		2099	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2100
		2101	/* create a closure from XS, returns a code reference */
		2102	/* the arg can be accessed via GENSUB_ARG from the callback */
		2103	/* the callback must use dXSARGS/XSRETURN */
1842	static OP *	2104	static SV *
1843	pp_restore (pTHX)	2105	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1844	{	2106	{
1845	dSP;	2107	CV *cv = (CV *)newSV (0);
1846		2108
1847	PUSHMARK (SP);	2109	sv_upgrade ((SV *)cv, SVt_PVCV);
1848		2110
1849	EXTEND (SP, 3);	2111	CvANON_on (cv);
1850	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));	2112	CvISXSUB_on (cv);
1851	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));	2113	CvXSUB (cv) = xsub;
1852	PUSHs ((SV *)CvGV (slf_cv));	2114	GENSUB_ARG = arg;
1853		2115
1854	RETURNOP (slf_restore.op_first);	2116	return newRV_noinc ((SV *)cv);
1855	}	2117	}
1856		2118
1857	#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */	2119	/*****************************************************************************/
		2120	/* Coro::AIO */
1858		2121
1859	enum {	2122	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
1860	CORO_SLF_CUSTOM = 0,	2123
1861	CORO_SLF_SET_STACKLEVEL = 1,	2124	/* helper storage struct */
1862	CORO_SLF_TRANSFER = 2	2125	struct io_state
		2126	{
		2127	int errorno;
		2128	I32 laststype; /* U16 in 5.10.0 */
		2129	int laststatval;
		2130	Stat_t statcache;
1863	};	2131	};
1864		2132
1865	/* declare prototype */	2133	static void
1866	XS(XS_Coro__State__set_stacklevel);	2134	coro_aio_callback (pTHX_ CV *cv)
1867
1868	/*
1869	* these not obviously related functions are all rolled into one
1870	* function to increase chances that they all will call transfer with the same
1871	* stack offset
1872	* SLF stands for "schedule-like-function".
1873	*/
1874	static OP *
1875	pp_slf (pTHX)
1876	{	2135	{
		2136	dXSARGS;
		2137	AV *state = (AV *)GENSUB_ARG;
		2138	SV *coro = av_pop (state);
		2139	SV *data_sv = newSV (sizeof (struct io_state));
		2140
		2141	av_extend (state, items);
		2142
		2143	sv_upgrade (data_sv, SVt_PV);
		2144	SvCUR_set (data_sv, sizeof (struct io_state));
		2145	SvPOK_only (data_sv);
		2146
		2147	{
		2148	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2149
		2150	data->errorno = errno;
		2151	data->laststype = PL_laststype;
		2152	data->laststatval = PL_laststatval;
		2153	data->statcache = PL_statcache;
		2154	}
		2155
		2156	/* now build the result vector out of all the parameters and the data_sv */
		2157	{
		2158	int i;
		2159
		2160	for (i = 0; i < items; ++i)
		2161	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2162	}
		2163
		2164	av_push (state, data_sv);
		2165
		2166	api_ready (aTHX_ coro);
		2167	SvREFCNT_dec (coro);
		2168	SvREFCNT_dec ((AV *)state);
		2169	}
		2170
		2171	static int
		2172	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2173	{
		2174	AV *state = (AV *)frame->data;
		2175
		2176	/* if we are about to throw, return early */
		2177	/* this does not cancel the aio request, but at least */
		2178	/* it quickly returns */
		2179	if (coro_throw)
		2180	return 0;
		2181
		2182	/* one element that is an RV? repeat! */
		2183	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2184	return 1;
		2185
		2186	/* restore status */
		2187	{
		2188	SV *data_sv = av_pop (state);
		2189	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2190
		2191	errno = data->errorno;
		2192	PL_laststype = data->laststype;
		2193	PL_laststatval = data->laststatval;
		2194	PL_statcache = data->statcache;
		2195
		2196	SvREFCNT_dec (data_sv);
		2197	}
		2198
		2199	/* push result values */
		2200	{
1877	dSP;	2201	dSP;
1878	struct transfer_args ta;	2202	int i;
1879	SV **arg = PL_stack_base + TOPMARK + 1;
1880	int items = SP - arg; /* args without function object */
1881	int ix = PL_op->op_private & OPpENTERSUB_SLF;
1882	struct CoroSLF *slf = 0;
1883		2203
1884	/* do a quick consistency check on the "function" object, and if it isn't */	2204	EXTEND (SP, AvFILLp (state) + 1);
1885	/* for us, divert to the real entersub */	2205	for (i = 0; i <= AvFILLp (state); ++i)
1886	if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)	2206	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
1887	return PL_ppaddr[OP_ENTERSUB](aTHX);
1888		2207
1889	/* pop args */
1890	SP = PL_stack_base + POPMARK;
1891
1892	if (!(PL_op->op_flags & OPf_STACKED))
1893	{
1894	/* ampersand-form of call, use @_ instead of stack */
1895	AV *av = GvAV (PL_defgv);
1896	arg = AvARRAY (av);
1897	items = AvFILLp (av) + 1;
1898	}
1899
1900	PUTBACK;	2208	PUTBACK;
		2209	}
1901		2210
1902	if (!ix)	2211	return 0;
1903	{	2212	}
1904	slf = (struct CoroSLF *)CvSTART (GvCV (*sp));	2213
1905	ix = slf->prepare (aTHX_ arg, items);	2214	static void
		2215	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2216	{
		2217	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2218	SV *coro_hv = SvRV (coro_current);
		2219	struct coro *coro = SvSTATE_hv (coro_hv);
		2220
		2221	/* put our coroutine id on the state arg */
		2222	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2223
		2224	/* first see whether we have a non-zero priority and set it as AIO prio */
		2225	if (coro->prio)
1906	}	2226	{
		2227	dSP;
1907		2228
1908	switch (ix)	2229	static SV *prio_cv;
		2230	static SV *prio_sv;
		2231
		2232	if (expect_false (!prio_cv))
		2233	{
		2234	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2235	prio_sv = newSViv (0);
		2236	}
		2237
		2238	PUSHMARK (SP);
		2239	sv_setiv (prio_sv, coro->prio);
		2240	XPUSHs (prio_sv);
		2241
		2242	PUTBACK;
		2243	call_sv (prio_cv, G_VOID | G_DISCARD);
1909	{	2244	}
1910	case CORO_SLF_SET_STACKLEVEL:
1911	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1912	break;
1913		2245
1914	case CORO_SLF_TRANSFER:	2246	/* now call the original request */
1915	if (items != 2)	2247	{
1916	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);	2248	dSP;
		2249	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2250	int i;
1917		2251
1918	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);	2252	PUSHMARK (SP);
1919	break;
1920		2253
1921	case CORO_SLF_SCHEDULE:	2254	/* first push all args to the stack */
1922	prepare_schedule (aTHX_ &ta);	2255	EXTEND (SP, items + 1);
1923	break;
1924		2256
1925	case CORO_SLF_CEDE:	2257	for (i = 0; i < items; ++i)
1926	prepare_cede (aTHX_ &ta);	2258	PUSHs (arg [i]);
1927	break;
1928		2259
1929	case CORO_SLF_CEDE_NOTSELF:	2260	/* now push the callback closure */
1930	prepare_cede_notself (aTHX_ &ta);	2261	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1931	break;
1932		2262
1933	default:	2263	/* now call the AIO function - we assume our request is uncancelable */
1934	abort ();
1935	}
1936
1937	do
1938	TRANSFER (ta, 0);
1939	while (slf && slf->check (aTHX));
1940
1941	SPAGAIN;
1942
1943	PUTBACK;	2264	PUTBACK;
1944	SLF_TAIL;	2265	call_sv ((SV *)req, G_VOID | G_DISCARD);
1945	SPAGAIN;	2266	}
1946	RETURN;
1947	}
1948		2267
1949	static void	2268	/* now that the requets is going, we loop toll we have a result */
1950	coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items)	2269	frame->data = (void *)state;
1951	{	2270	frame->prepare = prepare_schedule;
1952	assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));	2271	frame->check = slf_check_aio_req;
1953
1954	assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));
1955	slf_cv = cv;
1956
1957	/* we patch the op, and then re-run the whole call */
1958	/* we have to put the same argument on the stack for this to work */
1959	/* and this will be done by pp_restore */
1960	slf_restore.op_next = (OP *)&slf_restore;
1961	slf_restore.op_type = OP_NULL;
1962	slf_restore.op_ppaddr = pp_restore;
1963	slf_restore.op_first = PL_op;
1964
1965	slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1966	slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1967
1968	PL_op->op_ppaddr = pp_slf;
1969	PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */
1970
1971	PL_op = (OP *)&slf_restore;
1972	}	2272	}
		2273
		2274	static void
		2275	coro_aio_req_xs (pTHX_ CV *cv)
		2276	{
		2277	dXSARGS;
		2278
		2279	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2280
		2281	XSRETURN_EMPTY;
		2282	}
		2283
		2284	/*****************************************************************************/
1973		2285
1974	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2286	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1975		2287
1976	PROTOTYPES: DISABLE	2288	PROTOTYPES: DISABLE
1977		2289
1978	BOOT:	2290	BOOT:
1979	{	2291	{
1980	#ifdef USE_ITHREADS	2292	#ifdef USE_ITHREADS
1981	MUTEX_INIT (&coro_lock);
1982	# if CORO_PTHREAD	2293	# if CORO_PTHREAD
1983	coro_thx = PERL_GET_CONTEXT;	2294	coro_thx = PERL_GET_CONTEXT;
1984	# endif	2295	# endif
1985	#endif	2296	#endif
1986	BOOT_PAGESIZE;	2297	BOOT_PAGESIZE;
…		…
2007	main_top_env = PL_top_env;	2318	main_top_env = PL_top_env;
2008		2319
2009	while (main_top_env->je_prev)	2320	while (main_top_env->je_prev)
2010	main_top_env = main_top_env->je_prev;	2321	main_top_env = main_top_env->je_prev;
2011		2322
		2323	{
		2324	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2325
		2326	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2327	hv_store_ent (PL_custom_op_names, slf,
		2328	newSVpv ("coro_slf", 0), 0);
		2329
		2330	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2331	hv_store_ent (PL_custom_op_descs, slf,
		2332	newSVpv ("coro schedule like function", 0), 0);
		2333	}
		2334
2012	coroapi.ver = CORO_API_VERSION;	2335	coroapi.ver = CORO_API_VERSION;
2013	coroapi.rev = CORO_API_REVISION;	2336	coroapi.rev = CORO_API_REVISION;
		2337
2014	coroapi.transfer = api_transfer;	2338	coroapi.transfer = api_transfer;
		2339
		2340	coroapi.sv_state = SvSTATE_;
		2341	coroapi.execute_slf = api_execute_slf;
		2342	coroapi.prepare_nop = prepare_nop;
		2343	coroapi.prepare_schedule = prepare_schedule;
		2344	coroapi.prepare_cede = prepare_cede;
		2345	coroapi.prepare_cede_notself = prepare_cede_notself;
2015		2346
2016	{	2347	{
2017	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2348	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2018		2349
2019	if (!svp) croak ("Time::HiRes is required");	2350	if (!svp) croak ("Time::HiRes is required");
…		…
2053	}	2384	}
2054	OUTPUT:	2385	OUTPUT:
2055	RETVAL	2386	RETVAL
2056		2387
2057	void	2388	void
2058	_set_stacklevel (...)	2389	transfer (...)
2059	ALIAS:	2390	PROTOTYPE: $$
2060	_set_stacklevel = CORO_SLF_SET_STACKLEVEL	2391	CODE:
2061	Coro::State::transfer = CORO_SLF_TRANSFER	2392	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2062	Coro::schedule = CORO_SLF_SCHEDULE
2063	Coro::cede = CORO_SLF_CEDE
2064	Coro::cede_notself = CORO_SLF_CEDE_NOTSELF
2065	CODE:
2066	coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
2067		2393
2068	bool	2394	bool
2069	_destroy (SV *coro_sv)	2395	_destroy (SV *coro_sv)
2070	CODE:	2396	CODE:
2071	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2397	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2078	CODE:	2404	CODE:
2079	_exit (code);	2405	_exit (code);
2080		2406
2081	int	2407	int
2082	cctx_stacksize (int new_stacksize = 0)	2408	cctx_stacksize (int new_stacksize = 0)
		2409	PROTOTYPE: ;$
2083	CODE:	2410	CODE:
2084	RETVAL = cctx_stacksize;	2411	RETVAL = cctx_stacksize;
2085	if (new_stacksize)	2412	if (new_stacksize)
2086	{	2413	{
2087	cctx_stacksize = new_stacksize;	2414	cctx_stacksize = new_stacksize;
…		…
2090	OUTPUT:	2417	OUTPUT:
2091	RETVAL	2418	RETVAL
2092		2419
2093	int	2420	int
2094	cctx_max_idle (int max_idle = 0)	2421	cctx_max_idle (int max_idle = 0)
		2422	PROTOTYPE: ;$
2095	CODE:	2423	CODE:
2096	RETVAL = cctx_max_idle;	2424	RETVAL = cctx_max_idle;
2097	if (max_idle > 1)	2425	if (max_idle > 1)
2098	cctx_max_idle = max_idle;	2426	cctx_max_idle = max_idle;
2099	OUTPUT:	2427	OUTPUT:
2100	RETVAL	2428	RETVAL
2101		2429
2102	int	2430	int
2103	cctx_count ()	2431	cctx_count ()
		2432	PROTOTYPE:
2104	CODE:	2433	CODE:
2105	RETVAL = cctx_count;	2434	RETVAL = cctx_count;
2106	OUTPUT:	2435	OUTPUT:
2107	RETVAL	2436	RETVAL
2108		2437
2109	int	2438	int
2110	cctx_idle ()	2439	cctx_idle ()
		2440	PROTOTYPE:
2111	CODE:	2441	CODE:
2112	RETVAL = cctx_idle;	2442	RETVAL = cctx_idle;
2113	OUTPUT:	2443	OUTPUT:
2114	RETVAL	2444	RETVAL
2115		2445
2116	void	2446	void
2117	list ()	2447	list ()
		2448	PROTOTYPE:
2118	PPCODE:	2449	PPCODE:
2119	{	2450	{
2120	struct coro *coro;	2451	struct coro *coro;
2121	for (coro = coro_first; coro; coro = coro->next)	2452	for (coro = coro_first; coro; coro = coro->next)
2122	if (coro->hv)	2453	if (coro->hv)
…		…
2184		2515
2185	void	2516	void
2186	throw (Coro::State self, SV *throw = &PL_sv_undef)	2517	throw (Coro::State self, SV *throw = &PL_sv_undef)
2187	PROTOTYPE: $;$	2518	PROTOTYPE: $;$
2188	CODE:	2519	CODE:
		2520	{
		2521	struct coro *current = SvSTATE_current;
		2522	SV **throwp = self == current ? &coro_throw : &self->throw;
2189	SvREFCNT_dec (self->throw);	2523	SvREFCNT_dec (*throwp);
2190	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2524	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2525	}
2191		2526
2192	void	2527	void
2193	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2528	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2529	PROTOTYPE: $;$
2194	C_ARGS: aTHX_ coro, flags	2530	C_ARGS: aTHX_ coro, flags
2195		2531
2196	SV *	2532	SV *
2197	has_cctx (Coro::State coro)	2533	has_cctx (Coro::State coro)
2198	PROTOTYPE: $	2534	PROTOTYPE: $
…		…
2223	OUTPUT:	2559	OUTPUT:
2224	RETVAL	2560	RETVAL
2225		2561
2226	void	2562	void
2227	force_cctx ()	2563	force_cctx ()
		2564	PROTOTYPE:
2228	CODE:	2565	CODE:
2229	struct coro *coro = SvSTATE (coro_current);
2230	coro->cctx->idle_sp = 0;	2566	SvSTATE_current->cctx->idle_sp = 0;
2231		2567
2232	void	2568	void
2233	swap_defsv (Coro::State self)	2569	swap_defsv (Coro::State self)
2234	PROTOTYPE: $	2570	PROTOTYPE: $
2235	ALIAS:	2571	ALIAS:
2236	swap_defav = 1	2572	swap_defav = 1
2237	CODE:	2573	CODE:
2238	if (!self->slot)	2574	if (!self->slot)
2239	croak ("cannot swap state with coroutine that has no saved state");	2575	croak ("cannot swap state with coroutine that has no saved state,");
2240	else	2576	else
2241	{	2577	{
2242	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2578	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2243	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2579	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2244		2580
2245	SV *tmp = *src; *src = *dst; *dst = tmp;	2581	SV *tmp = *src; *src = *dst; *dst = tmp;
2246	}	2582	}
		2583
2247		2584
2248	MODULE = Coro::State PACKAGE = Coro	2585	MODULE = Coro::State PACKAGE = Coro
2249		2586
2250	BOOT:	2587	BOOT:
2251	{	2588	{
…		…
2286	SvREADONLY_on (sv);	2623	SvREADONLY_on (sv);
2287	}	2624	}
2288	}	2625	}
2289		2626
2290	void	2627	void
		2628	schedule (...)
		2629	CODE:
		2630	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2631
		2632	void
		2633	cede (...)
		2634	CODE:
		2635	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2636
		2637	void
		2638	cede_notself (...)
		2639	CODE:
		2640	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
		2641
		2642	void
2291	_set_current (SV *current)	2643	_set_current (SV *current)
2292	PROTOTYPE: $	2644	PROTOTYPE: $
2293	CODE:	2645	CODE:
2294	SvREFCNT_dec (SvRV (coro_current));	2646	SvREFCNT_dec (SvRV (coro_current));
2295	SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));	2647	SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2296		2648
2297	void	2649	void
2298	_set_readyhook (SV *hook)	2650	_set_readyhook (SV *hook)
2299	PROTOTYPE: $	2651	PROTOTYPE: $
2300	CODE:	2652	CODE:
2301	LOCK;
2302	SvREFCNT_dec (coro_readyhook);	2653	SvREFCNT_dec (coro_readyhook);
2303	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2654	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2304	UNLOCK;
2305		2655
2306	int	2656	int
2307	prio (Coro::State coro, int newprio = 0)	2657	prio (Coro::State coro, int newprio = 0)
		2658	PROTOTYPE: $;$
2308	ALIAS:	2659	ALIAS:
2309	nice = 1	2660	nice = 1
2310	CODE:	2661	CODE:
2311	{	2662	{
2312	RETVAL = coro->prio;	2663	RETVAL = coro->prio;
…		…
2344	# for async_pool speedup	2695	# for async_pool speedup
2345	void	2696	void
2346	_pool_1 (SV *cb)	2697	_pool_1 (SV *cb)
2347	CODE:	2698	CODE:
2348	{	2699	{
2349	struct coro *coro = SvSTATE (coro_current);
2350	HV *hv = (HV *)SvRV (coro_current);	2700	HV *hv = (HV *)SvRV (coro_current);
		2701	struct coro *coro = SvSTATE_hv ((SV *)hv);
2351	AV *defav = GvAV (PL_defgv);	2702	AV *defav = GvAV (PL_defgv);
2352	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2703	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2353	AV *invoke_av;	2704	AV *invoke_av;
2354	int i, len;	2705	int i, len;
2355		2706
…		…
2376	{	2727	{
2377	av_fill (defav, len - 1);	2728	av_fill (defav, len - 1);
2378	for (i = 0; i < len; ++i)	2729	for (i = 0; i < len; ++i)
2379	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2730	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2380	}	2731	}
2381
2382	SvREFCNT_dec (invoke);
2383	}	2732	}
2384		2733
2385	void	2734	void
2386	_pool_2 (SV *cb)	2735	_pool_2 (SV *cb)
2387	CODE:	2736	CODE:
2388	{	2737	{
2389	struct coro *coro = SvSTATE (coro_current);	2738	HV *hv = (HV *)SvRV (coro_current);
		2739	struct coro *coro = SvSTATE_hv ((SV *)hv);
2390		2740
2391	sv_setsv (cb, &PL_sv_undef);	2741	sv_setsv (cb, &PL_sv_undef);
2392		2742
2393	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2743	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2394	coro->saved_deffh = 0;	2744	coro->saved_deffh = 0;
…		…
2401	SvREFCNT_dec (old);	2751	SvREFCNT_dec (old);
2402	croak ("\3async_pool terminate\2\n");	2752	croak ("\3async_pool terminate\2\n");
2403	}	2753	}
2404		2754
2405	av_clear (GvAV (PL_defgv));	2755	av_clear (GvAV (PL_defgv));
2406	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2756	hv_store (hv, "desc", sizeof ("desc") - 1,
2407	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2757	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2408		2758
2409	coro->prio = 0;	2759	coro->prio = 0;
2410		2760
2411	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2761	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2412	api_trace (aTHX_ coro_current, 0);	2762	api_trace (aTHX_ coro_current, 0);
2413		2763
2414	av_push (av_async_pool, newSVsv (coro_current));	2764	av_push (av_async_pool, newSVsv (coro_current));
2415	}	2765	}
2416		2766
2417	#if 0
2418		2767
2419	void	2768	MODULE = Coro::State PACKAGE = PerlIO::cede
2420	_generator_call (...)	2769
2421	PROTOTYPE: @	2770	BOOT:
2422	PPCODE:	2771	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2423	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);	2772
2424	xxxx	2773
2425	abort ();	2774	MODULE = Coro::State PACKAGE = Coro::Semaphore
2426		2775
2427	SV *	2776	SV *
2428	gensub (SV *sub, ...)	2777	new (SV *klass, SV *count_ = 0)
2429	PROTOTYPE: &;@	2778	CODE:
2430	CODE:
2431	{	2779	{
2432	struct coro *coro;	2780	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2433	MAGIC *mg;	2781	AV *av = newAV ();
2434	CV *xcv;	2782	SV **ary;
2435	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2436	int i;
2437		2783
2438	CvGV (ncv) = CvGV (cv);	2784	/* unfortunately, building manually saves memory */
2439	CvFILE (ncv) = CvFILE (cv);	2785	Newx (ary, 2, SV *);
		2786	AvALLOC (av) = ary;
		2787	AvARRAY (av) = ary;
		2788	AvMAX (av) = 1;
		2789	AvFILLp (av) = 0;
		2790	ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2440		2791
2441	Newz (0, coro, 1, struct coro);	2792	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2442	coro->args = newAV ();
2443	coro->flags = CF_NEW;
2444
2445	av_extend (coro->args, items - 1);
2446	for (i = 1; i < items; i++)
2447	av_push (coro->args, newSVsv (ST (i)));
2448
2449	CvISXSUB_on (ncv);
2450	CvXSUBANY (ncv).any_ptr = (void *)coro;
2451
2452	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2453
2454	CvXSUB (ncv) = CvXSUB (xcv);
2455	CvANON_on (ncv);
2456
2457	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2458	RETVAL = newRV_noinc ((SV *)ncv);
2459	}	2793	}
2460	OUTPUT:	2794	OUTPUT:
2461	RETVAL	2795	RETVAL
2462		2796
2463	#endif	2797	SV *
2464		2798	count (SV *self)
2465		2799	CODE:
2466	MODULE = Coro::State PACKAGE = Coro::AIO	2800	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2801	OUTPUT:
		2802	RETVAL
2467		2803
2468	void	2804	void
2469	_get_state (SV *self)	2805	up (SV *self, int adjust = 1)
2470	PPCODE:	2806	ALIAS:
2471	{	2807	adjust = 1
2472	AV *defav = GvAV (PL_defgv);	2808	CODE:
2473	AV *av = newAV ();	2809	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2474	int i;
2475	SV *data_sv = newSV (sizeof (struct io_state));
2476	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2477	SvCUR_set (data_sv, sizeof (struct io_state));
2478	SvPOK_only (data_sv);
2479
2480	data->errorno = errno;
2481	data->laststype = PL_laststype;
2482	data->laststatval = PL_laststatval;
2483	data->statcache = PL_statcache;
2484
2485	av_extend (av, AvFILLp (defav) + 1 + 1);
2486
2487	for (i = 0; i <= AvFILLp (defav); ++i)
2488	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2489
2490	av_push (av, data_sv);
2491
2492	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2493
2494	api_ready (aTHX_ self);
2495	}
2496		2810
2497	void	2811	void
2498	_set_state (SV *state)	2812	down (SV *self)
2499	PROTOTYPE: $	2813	CODE:
2500	PPCODE:	2814	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2815
		2816	void
		2817	try (SV *self)
		2818	PPCODE:
2501	{	2819	{
2502	AV *av = (AV *)SvRV (state);	2820	AV *av = (AV *)SvRV (self);
2503	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);	2821	SV *count_sv = AvARRAY (av)[0];
		2822	IV count = SvIVX (count_sv);
		2823
		2824	if (count > 0)
		2825	{
		2826	--count;
		2827	SvIVX (count_sv) = count;
		2828	XSRETURN_YES;
		2829	}
		2830	else
		2831	XSRETURN_NO;
		2832	}
		2833
		2834	void
		2835	waiters (SV *self)
		2836	CODE:
		2837	{
		2838	AV *av = (AV *)SvRV (self);
		2839
		2840	if (GIMME_V == G_SCALAR)
		2841	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2842	else
		2843	{
2504	int i;	2844	int i;
2505
2506	errno = data->errorno;
2507	PL_laststype = data->laststype;
2508	PL_laststatval = data->laststatval;
2509	PL_statcache = data->statcache;
2510
2511	EXTEND (SP, AvFILLp (av));	2845	EXTEND (SP, AvFILLp (av) + 1 - 1);
2512	for (i = 0; i < AvFILLp (av); ++i)	2846	for (i = 1; i <= AvFILLp (av); ++i)
2513	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	2847	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
		2848	}
2514	}	2849	}
2515		2850
2516		2851
2517	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2852	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2518		2853
2519	BOOT:	2854	BOOT:
2520	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2855	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2521		2856
2522	SV *	2857	void
2523	_schedule (...)	2858	_schedule (...)
2524	PROTOTYPE: @
2525	CODE:	2859	CODE:
2526	{	2860	{
2527	static int incede;	2861	static int incede;
2528		2862
2529	api_cede_notself (aTHX);	2863	api_cede_notself (aTHX);
…		…
2535	sv_setsv (sv_activity, &PL_sv_undef);	2869	sv_setsv (sv_activity, &PL_sv_undef);
2536	if (coro_nready >= incede)	2870	if (coro_nready >= incede)
2537	{	2871	{
2538	PUSHMARK (SP);	2872	PUSHMARK (SP);
2539	PUTBACK;	2873	PUTBACK;
2540	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);	2874	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2541	SPAGAIN;
2542	}	2875	}
2543		2876
2544	--incede;	2877	--incede;
2545	}	2878	}
2546		2879
2547		2880
2548	MODULE = Coro::State PACKAGE = PerlIO::cede	2881	MODULE = Coro::State PACKAGE = Coro::AIO
2549		2882
2550	BOOT:	2883	void
2551	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2884	_register (char *target, char *proto, SV *req)
		2885	CODE:
		2886	{
		2887	HV *st;
		2888	GV *gvp;
		2889	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		2890	/* newXSproto doesn't return the CV on 5.8 */
		2891	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		2892	sv_setpv ((SV *)slf_cv, proto);
		2893	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		2894	}
2552		2895

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