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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.276 by root, Sat Nov 15 07:49:48 2008 UTC vs.
Revision 1.309 by root, Wed Nov 19 15:29:57 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
…		…
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
…		…
140	#define expect_true(expr) expect ((expr) != 0, 1)	145	#define expect_true(expr) expect ((expr) != 0, 1)
141		146
142	#define NOINLINE attribute ((noinline))	147	#define NOINLINE attribute ((noinline))
143		148
144	#include "CoroAPI.h"	149	#include "CoroAPI.h"
		150	#define GCoroAPI (&coroapi) /* very sneaky */
145		151
146	#ifdef USE_ITHREADS	152	#ifdef USE_ITHREADS
147
148	static perl_mutex coro_lock;
149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151	# if CORO_PTHREAD	153	# if CORO_PTHREAD
152	static void *coro_thx;	154	static void *coro_thx;
153	# endif	155	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	156	#endif
161
162	# undef LOCK
163	# define LOCK (void)0
164	# undef UNLOCK
165	# define UNLOCK (void)0
166
167	/* helper storage struct for Coro::AIO */
168	struct io_state
169	{
170	AV *res;
171	int errorno;
172	I32 laststype; /* U16 in 5.10.0 */
173	int laststatval;
174	Stat_t statcache;
175	};
176		157
177	static double (*nvtime)(); /* so why doesn't it take void? */	158	static double (*nvtime)(); /* so why doesn't it take void? */
		159
		160	/* we hijack an hopefully unused CV flag for our purposes */
		161	#define CVf_SLF 0x4000
		162	static OP *pp_slf (pTHX);
178		163
179	static U32 cctx_gen;	164	static U32 cctx_gen;
180	static size_t cctx_stacksize = CORO_STACKSIZE;	165	static size_t cctx_stacksize = CORO_STACKSIZE;
181	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
182	static AV *main_mainstack; /* used to differentiate between $main and others */	167	static AV *main_mainstack; /* used to differentiate between $main and others */
183	static JMPENV *main_top_env;	168	static JMPENV *main_top_env;
184	static HV *coro_state_stash, *coro_stash;	169	static HV *coro_state_stash, *coro_stash;
		170	static CV *coro_run_cv;
185	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */	171	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186	static volatile struct coro *transfer_next;
187		172
188	static GV *irsgv; /* $/ */	173	static GV *irsgv; /* $/ */
189	static GV *stdoutgv; /* *STDOUT */	174	static GV *stdoutgv; /* *STDOUT */
190	static SV *rv_diehook;	175	static SV *rv_diehook;
191	static SV *rv_warnhook;	176	static SV *rv_warnhook;
…		…
257	/* this is a structure representing a perl-level coroutine */	242	/* this is a structure representing a perl-level coroutine */
258	struct coro {	243	struct coro {
259	/* the C coroutine allocated to this perl coroutine, if any */	244	/* the C coroutine allocated to this perl coroutine, if any */
260	coro_cctx *cctx;	245	coro_cctx *cctx;
261		246
262	/* process data */	247	/* state data */
263	struct CoroSLF slf_frame; /* saved slf frame */	248	struct CoroSLF slf_frame; /* saved slf frame */
264	AV *mainstack;	249	AV *mainstack;
265	perl_slots *slot; /* basically the saved sp */	250	perl_slots *slot; /* basically the saved sp */
266		251
		252	CV *startcv; /* the CV to execute */
267	AV *args; /* data associated with this coroutine (initial args) */	253	AV *args; /* data associated with this coroutine (initial args) */
268	int refcnt; /* coroutines are refcounted, yes */	254	int refcnt; /* coroutines are refcounted, yes */
269	int flags; /* CF_ flags */	255	int flags; /* CF_ flags */
270	HV *hv; /* the perl hash associated with this coro, if any */	256	HV *hv; /* the perl hash associated with this coro, if any */
		257	void (*on_destroy)(pTHX_ struct coro *coro);
271		258
272	/* statistics */	259	/* statistics */
273	int usecount; /* number of transfers to this coro */	260	int usecount; /* number of transfers to this coro */
274		261
275	/* coro process data */	262	/* coro process data */
276	int prio;	263	int prio;
277	SV *throw; /* exception to be thrown */	264	SV *except; /* exception to be thrown */
		265	SV *rouse_cb;
278		266
279	/* async_pool */	267	/* async_pool */
280	SV *saved_deffh;	268	SV *saved_deffh;
281		269
282	/* linked list */	270	/* linked list */
…		…
284	};	272	};
285		273
286	typedef struct coro *Coro__State;	274	typedef struct coro *Coro__State;
287	typedef struct coro *Coro__State_or_hashref;	275	typedef struct coro *Coro__State_or_hashref;
288		276
		277	/* the following variables are effectively part of the perl context */
		278	/* and get copied between struct coro and these variables */
		279	/* the mainr easonw e don't support windows process emulation */
289	static struct CoroSLF slf_frame; /* the current slf frame */	280	static struct CoroSLF slf_frame; /* the current slf frame */
290		281
291	/** Coro ********************************************************************/	282	/** Coro ********************************************************************/
292		283
293	#define PRIO_MAX 3	284	#define PRIO_MAX 3
…		…
332	#if PERL_VERSION_ATLEAST (5,10,0)	323	#if PERL_VERSION_ATLEAST (5,10,0)
333	/* silence stupid and wrong 5.10 warning that I am unable to switch off */	324	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
334	get_hv (name, create);	325	get_hv (name, create);
335	#endif	326	#endif
336	return get_hv (name, create);	327	return get_hv (name, create);
		328	}
		329
		330	/* may croak */
		331	INLINE CV *
		332	coro_sv_2cv (SV *sv)
		333	{
		334	HV *st;
		335	GV *gvp;
		336	return sv_2cv (sv, &st, &gvp, 0);
337	}	337	}
338		338
339	static AV *	339	static AV *
340	coro_clone_padlist (pTHX_ CV *cv)	340	coro_clone_padlist (pTHX_ CV *cv)
341	{	341	{
…		…
395	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	395	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396		396
397	return 0;	397	return 0;
398	}	398	}
399		399
400	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	400	#define CORO_MAGIC_type_cv 26
401	#define CORO_MAGIC_type_state PERL_MAGIC_ext	401	#define CORO_MAGIC_type_state PERL_MAGIC_ext
402		402
403	static MGVTBL coro_cv_vtbl = {	403	static MGVTBL coro_cv_vtbl = {
404	0, 0, 0, 0,	404	0, 0, 0, 0,
405	coro_cv_free	405	coro_cv_free
406	};	406	};
407		407
		408	#define CORO_MAGIC_NN(sv, type) \
		409	(expect_true (SvMAGIC (sv)->mg_type == type) \
		410	? SvMAGIC (sv) \
		411	: mg_find (sv, type))
		412
408	#define CORO_MAGIC(sv, type) \	413	#define CORO_MAGIC(sv, type) \
409	SvMAGIC (sv) \	414	(expect_true (SvMAGIC (sv)) \
410	? SvMAGIC (sv)->mg_type == type \	415	? CORO_MAGIC_NN (sv, type) \
411	? SvMAGIC (sv) \
412	: mg_find (sv, type) \
413	: 0	416	: 0)
414		417
415	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	418	#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)	419	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
417		420
418	INLINE struct coro *	421	INLINE struct coro *
419	SvSTATE_ (pTHX_ SV *coro)	422	SvSTATE_ (pTHX_ SV *coro)
420	{	423	{
421	HV *stash;	424	HV *stash;
…		…
438	mg = CORO_MAGIC_state (coro);	441	mg = CORO_MAGIC_state (coro);
439	return (struct coro *)mg->mg_ptr;	442	return (struct coro *)mg->mg_ptr;
440	}	443	}
441		444
442	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	445	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		446
		447	/* faster than SvSTATE, but expects a coroutine hv */
		448	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		449	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443		450
444	/* the next two functions merely cache the padlists */	451	/* the next two functions merely cache the padlists */
445	static void	452	static void
446	get_padlist (pTHX_ CV *cv)	453	get_padlist (pTHX_ CV *cv)
447	{	454	{
…		…
453	else	460	else
454	{	461	{
455	#if CORO_PREFER_PERL_FUNCTIONS	462	#if CORO_PREFER_PERL_FUNCTIONS
456	/* this is probably cleaner? but also slower! */	463	/* this is probably cleaner? but also slower! */
457	/* in practise, it seems to be less stable */	464	/* in practise, it seems to be less stable */
458	CV *cp = Perl_cv_clone (cv);	465	CV *cp = Perl_cv_clone (aTHX_ cv);
459	CvPADLIST (cv) = CvPADLIST (cp);	466	CvPADLIST (cv) = CvPADLIST (cp);
460	CvPADLIST (cp) = 0;	467	CvPADLIST (cp) = 0;
461	SvREFCNT_dec (cp);	468	SvREFCNT_dec (cp);
462	#else	469	#else
463	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	470	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
515	}	522	}
516		523
517	PUTBACK;	524	PUTBACK;
518	}	525	}
519		526
520	slf_frame = c->slf_frame;	527	slf_frame = c->slf_frame;
		528	CORO_THROW = c->except;
521	}	529	}
522		530
523	static void	531	static void
524	save_perl (pTHX_ Coro__State c)	532	save_perl (pTHX_ Coro__State c)
525	{	533	{
		534	c->except = CORO_THROW;
526	c->slf_frame = slf_frame;	535	c->slf_frame = slf_frame;
527		536
528	{	537	{
529	dSP;	538	dSP;
530	I32 cxix = cxstack_ix;	539	I32 cxix = cxstack_ix;
…		…
605	* of perl.c:init_stacks, except that it uses less memory	614	* of perl.c:init_stacks, except that it uses less memory
606	* on the (sometimes correct) assumption that coroutines do	615	* on the (sometimes correct) assumption that coroutines do
607	* not usually need a lot of stackspace.	616	* not usually need a lot of stackspace.
608	*/	617	*/
609	#if CORO_PREFER_PERL_FUNCTIONS	618	#if CORO_PREFER_PERL_FUNCTIONS
610	# define coro_init_stacks init_stacks	619	# define coro_init_stacks(thx) init_stacks ()
611	#else	620	#else
612	static void	621	static void
613	coro_init_stacks (pTHX)	622	coro_init_stacks (pTHX)
614	{	623	{
615	PL_curstackinfo = new_stackinfo(32, 8);	624	PL_curstackinfo = new_stackinfo(32, 8);
…		…
811		820
812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	821	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813	}	822	}
814		823
815	static void	824	static void
816	prepare_nop (aTHX_ struct coro_transfer_args *ta)	825	prepare_nop (pTHX_ struct coro_transfer_args *ta)
817	{	826	{
818	/* kind of mega-hacky, but works */	827	/* kind of mega-hacky, but works */
819	ta->next = ta->prev = (struct coro *)ta;	828	ta->next = ta->prev = (struct coro *)ta;
820	}	829	}
821		830
822	static int	831	static int
823	slf_check_nop (aTHX)	832	slf_check_nop (pTHX_ struct CoroSLF *frame)
824	{	833	{
825	return 0;	834	return 0;
826	}	835	}
827		836
828	static void	837	static UNOP coro_setup_op;
		838
		839	static void NOINLINE /* noinline to keep it out of the transfer fast path */
829	coro_setup (pTHX_ struct coro *coro)	840	coro_setup (pTHX_ struct coro *coro)
830	{	841	{
831	/*	842	/*
832	* emulate part of the perl startup here.	843	* emulate part of the perl startup here.
833	*/	844	*/
…		…
860	{	871	{
861	dSP;	872	dSP;
862	UNOP myop;	873	UNOP myop;
863		874
864	Zero (&myop, 1, UNOP);	875	Zero (&myop, 1, UNOP);
865	myop.op_next = Nullop;	876	myop.op_next = Nullop;
		877	myop.op_type = OP_ENTERSUB;
866	myop.op_flags = OPf_WANT_VOID;	878	myop.op_flags = OPf_WANT_VOID;
867		879
868	PUSHMARK (SP);	880	PUSHMARK (SP);
869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	881	PUSHs ((SV *)coro->startcv);
870	PUTBACK;	882	PUTBACK;
871	PL_op = (OP *)&myop;	883	PL_op = (OP *)&myop;
872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	884	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873	SPAGAIN;
874	}	885	}
875		886
876	/* this newly created coroutine might be run on an existing cctx which most	887	/* this newly created coroutine might be run on an existing cctx which most
877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.	888	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878	*/	889	*/
879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */	890	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 */	891	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		892
		893	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		894	coro_setup_op.op_next = PL_op;
		895	coro_setup_op.op_type = OP_CUSTOM;
		896	coro_setup_op.op_ppaddr = pp_slf;
		897	/* no flags etc. required, as an init function won't be called */
		898
		899	PL_op = (OP *)&coro_setup_op;
		900
		901	/* copy throw, in case it was set before coro_setup */
		902	CORO_THROW = coro->except;
881	}	903	}
882		904
883	static void	905	static void
884	coro_destruct (pTHX_ struct coro *coro)	906	coro_destruct (pTHX_ struct coro *coro)
885	{	907	{
…		…
909		931
910	SvREFCNT_dec (PL_diehook);	932	SvREFCNT_dec (PL_diehook);
911	SvREFCNT_dec (PL_warnhook);	933	SvREFCNT_dec (PL_warnhook);
912		934
913	SvREFCNT_dec (coro->saved_deffh);	935	SvREFCNT_dec (coro->saved_deffh);
914	SvREFCNT_dec (coro->throw);	936	SvREFCNT_dec (coro->rouse_cb);
915		937
916	coro_destruct_stacks (aTHX);	938	coro_destruct_stacks (aTHX);
917	}	939	}
918		940
919	INLINE void	941	INLINE void
…		…
929	static int	951	static int
930	runops_trace (pTHX)	952	runops_trace (pTHX)
931	{	953	{
932	COP *oldcop = 0;	954	COP *oldcop = 0;
933	int oldcxix = -2;	955	int oldcxix = -2;
934	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	956	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
935	coro_cctx *cctx = coro->cctx;	957	coro_cctx *cctx = coro->cctx;
936		958
937	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	959	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938	{	960	{
939	PERL_ASYNC_CHECK ();	961	PERL_ASYNC_CHECK ();
…		…
1006	SAVETMPS;	1028	SAVETMPS;
1007	EXTEND (SP, 3);	1029	EXTEND (SP, 3);
1008	PUSHMARK (SP);	1030	PUSHMARK (SP);
1009	PUSHs (&PL_sv_yes);	1031	PUSHs (&PL_sv_yes);
1010	PUSHs (fullname);	1032	PUSHs (fullname);
1011	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);	1033	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012	PUTBACK;	1034	PUTBACK;
1013	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);	1035	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1014	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);	1036	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015	SPAGAIN;	1037	SPAGAIN;
1016	FREETMPS;	1038	FREETMPS;
…		…
1048		1070
1049	TAINT_NOT;	1071	TAINT_NOT;
1050	return 0;	1072	return 0;
1051	}	1073	}
1052		1074
		1075	static struct coro_cctx *cctx_ssl_cctx;
		1076	static struct CoroSLF cctx_ssl_frame;
		1077
1053	static void	1078	static void
1054	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)	1079	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1055	{	1080	{
1056	ta->prev = (struct coro *)cctx;	1081	ta->prev = (struct coro *)cctx_ssl_cctx;
1057	ta->next = 0;	1082	ta->next = 0;
1058	}	1083	}
1059		1084
1060	/* inject a fake call to Coro::State::_cctx_init into the execution */	1085	static int
1061	/* _cctx_init should be careful, as it could be called at almost any time */	1086	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1062	/* during execution of a perl program */	1087	{
1063	/* also initialises PL_top_env */	1088	*frame = cctx_ssl_frame;
		1089
		1090	return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
		1091	}
		1092
		1093	/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1064	static void NOINLINE	1094	static void NOINLINE
1065	cctx_prepare (pTHX_ coro_cctx *cctx)	1095	cctx_prepare (pTHX_ coro_cctx *cctx)
1066	{	1096	{
1067	dSP;
1068	UNOP myop;
1069
1070	PL_top_env = &PL_start_env;	1097	PL_top_env = &PL_start_env;
1071		1098
1072	if (cctx->flags & CC_TRACE)	1099	if (cctx->flags & CC_TRACE)
1073	PL_runops = runops_trace;	1100	PL_runops = runops_trace;
1074		1101
1075	Zero (&myop, 1, UNOP);	1102	/* we already must be executing an SLF op, there is no other valid way
1076	myop.op_next = PL_op;	1103	* that can lead to creation of a new cctx */
1077	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1104	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1105	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1078		1106
1079	PUSHMARK (SP);	1107	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1080	EXTEND (SP, 2);	1108	cctx_ssl_cctx = cctx;
1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));	1109	cctx_ssl_frame = slf_frame;
1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1110
1083	PUTBACK;	1111	slf_frame.prepare = slf_prepare_set_stacklevel;
1084	PL_op = (OP *)&myop;	1112	slf_frame.check = slf_check_set_stacklevel;
1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086	SPAGAIN;
1087	}	1113	}
1088		1114
1089	/* the tail of transfer: execute stuff we can only do after a transfer */	1115	/* the tail of transfer: execute stuff we can only do after a transfer */
1090	INLINE void	1116	INLINE void
1091	transfer_tail (pTHX)	1117	transfer_tail (pTHX)
1092	{	1118	{
1093	struct coro *next = (struct coro *)transfer_next;
1094	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097	free_coro_mortal (aTHX);	1119	free_coro_mortal (aTHX);
1098	UNLOCK;
1099
1100	if (expect_false (next->throw))
1101	{
1102	SV *exception = sv_2mortal (next->throw);
1103
1104	next->throw = 0;
1105	sv_setsv (ERRSV, exception);
1106	croak (0);
1107	}
1108	}	1120	}
1109		1121
1110	/*	1122	/*
1111	* this is a _very_ stripped down perl interpreter ;)	1123	* this is a _very_ stripped down perl interpreter ;)
1112	*/	1124	*/
…		…
1127		1139
1128	/* inject a fake subroutine call to cctx_init */	1140	/* inject a fake subroutine call to cctx_init */
1129	cctx_prepare (aTHX_ (coro_cctx *)arg);	1141	cctx_prepare (aTHX_ (coro_cctx *)arg);
1130		1142
1131	/* cctx_run is the alternative tail of transfer() */	1143	/* cctx_run is the alternative tail of transfer() */
1132	/* TODO: throwing an exception here might be deadly, VERIFY */
1133	transfer_tail (aTHX);	1144	transfer_tail (aTHX);
1134		1145
1135	/* somebody or something will hit me for both perl_run and PL_restartop */	1146	/* somebody or something will hit me for both perl_run and PL_restartop */
1136	PL_restartop = PL_op;	1147	PL_restartop = PL_op;
1137	perl_run (PL_curinterp);	1148	perl_run (PL_curinterp);
		1149	/*
		1150	* Unfortunately, there is no way to get at the return values of the
		1151	* coro body here, as perl_run destroys these
		1152	*/
1138		1153
1139	/*	1154	/*
1140	* If perl-run returns we assume exit() was being called or the coro	1155	* If perl-run returns we assume exit() was being called or the coro
1141	* fell off the end, which seems to be the only valid (non-bug)	1156	* fell off the end, which seems to be the only valid (non-bug)
1142	* reason for perl_run to return. We try to exit by jumping to the	1157	* reason for perl_run to return. We try to exit by jumping to the
…		…
1293	/** coroutine switching *****************************************************/	1308	/** coroutine switching *****************************************************/
1294		1309
1295	static void	1310	static void
1296	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1311	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297	{	1312	{
		1313	/* TODO: throwing up here is considered harmful */
		1314
1298	if (expect_true (prev != next))	1315	if (expect_true (prev != next))
1299	{	1316	{
1300	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1317	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");	1318	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302		1319
…		…
1312	#endif	1329	#endif
1313	}	1330	}
1314	}	1331	}
1315		1332
1316	/* always use the TRANSFER macro */	1333	/* always use the TRANSFER macro */
1317	static void NOINLINE	1334	static void NOINLINE /* noinline so we have a fixed stackframe */
1318	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1335	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319	{	1336	{
1320	dSTACKLEVEL;	1337	dSTACKLEVEL;
1321		1338
1322	/* sometimes transfer is only called to set idle_sp */	1339	/* sometimes transfer is only called to set idle_sp */
1323	if (expect_false (!next))	1340	if (expect_false (!next))
1324	{	1341	{
1325	((coro_cctx *)prev)->idle_sp = stacklevel;	1342	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1326	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1343	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327	}	1344	}
1328	else if (expect_true (prev != next))	1345	else if (expect_true (prev != next))
1329	{	1346	{
1330	coro_cctx *prev__cctx;	1347	coro_cctx *prev__cctx;
…		…
1337	prev->flags |= CF_RUNNING;	1354	prev->flags |= CF_RUNNING;
1338	}	1355	}
1339		1356
1340	prev->flags &= ~CF_RUNNING;	1357	prev->flags &= ~CF_RUNNING;
1341	next->flags |= CF_RUNNING;	1358	next->flags |= CF_RUNNING;
1342
1343	LOCK;
1344		1359
1345	/* first get rid of the old state */	1360	/* first get rid of the old state */
1346	save_perl (aTHX_ prev);	1361	save_perl (aTHX_ prev);
1347		1362
1348	if (expect_false (next->flags & CF_NEW))	1363	if (expect_false (next->flags & CF_NEW))
…		…
1357		1372
1358	prev__cctx = prev->cctx;	1373	prev__cctx = prev->cctx;
1359		1374
1360	/* possibly untie and reuse the cctx */	1375	/* possibly untie and reuse the cctx */
1361	if (expect_true (	1376	if (expect_true (
1362	prev__cctx->idle_sp == stacklevel	1377	prev__cctx->idle_sp == STACKLEVEL
1363	&& !(prev__cctx->flags & CC_TRACE)	1378	&& !(prev__cctx->flags & CC_TRACE)
1364	&& !force_cctx	1379	&& !force_cctx
1365	))	1380	))
1366	{	1381	{
1367	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */	1382	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
…		…
1381	++next->usecount;	1396	++next->usecount;
1382		1397
1383	if (expect_true (!next->cctx))	1398	if (expect_true (!next->cctx))
1384	next->cctx = cctx_get (aTHX);	1399	next->cctx = cctx_get (aTHX);
1385		1400
1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387	transfer_next = next;
1388
1389	if (expect_false (prev__cctx != next->cctx))	1401	if (expect_false (prev__cctx != next->cctx))
1390	{	1402	{
1391	prev__cctx->top_env = PL_top_env;	1403	prev__cctx->top_env = PL_top_env;
1392	PL_top_env = next->cctx->top_env;	1404	PL_top_env = next->cctx->top_env;
1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1405	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
…		…
1406	coro_state_destroy (pTHX_ struct coro *coro)	1418	coro_state_destroy (pTHX_ struct coro *coro)
1407	{	1419	{
1408	if (coro->flags & CF_DESTROYED)	1420	if (coro->flags & CF_DESTROYED)
1409	return 0;	1421	return 0;
1410		1422
		1423	if (coro->on_destroy)
		1424	coro->on_destroy (aTHX_ coro);
		1425
1411	coro->flags |= CF_DESTROYED;	1426	coro->flags |= CF_DESTROYED;
1412		1427
1413	if (coro->flags & CF_READY)	1428	if (coro->flags & CF_READY)
1414	{	1429	{
1415	/* reduce nready, as destroying a ready coro effectively unreadies it */	1430	/* reduce nready, as destroying a ready coro effectively unreadies it */
1416	/* alternative: look through all ready queues and remove the coro */	1431	/* alternative: look through all ready queues and remove the coro */
1417	LOCK;
1418	--coro_nready;	1432	--coro_nready;
1419	UNLOCK;
1420	}	1433	}
1421	else	1434	else
1422	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1435	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423		1436
1424	if (coro->mainstack && coro->mainstack != main_mainstack)	1437	if (coro->mainstack && coro->mainstack != main_mainstack)
…		…
1436		1449
1437	coro->slot = 0;	1450	coro->slot = 0;
1438	}	1451	}
1439		1452
1440	cctx_destroy (coro->cctx);	1453	cctx_destroy (coro->cctx);
		1454	SvREFCNT_dec (coro->startcv);
1441	SvREFCNT_dec (coro->args);	1455	SvREFCNT_dec (coro->args);
		1456	SvREFCNT_dec (CORO_THROW);
1442		1457
1443	if (coro->next) coro->next->prev = coro->prev;	1458	if (coro->next) coro->next->prev = coro->prev;
1444	if (coro->prev) coro->prev->next = coro->next;	1459	if (coro->prev) coro->prev->next = coro->next;
1445	if (coro == coro_first) coro_first = coro->next;	1460	if (coro == coro_first) coro_first = coro->next;
1446		1461
…		…
1500		1515
1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1516	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1502	TRANSFER (ta, 1);	1517	TRANSFER (ta, 1);
1503	}	1518	}
1504		1519
		1520	/*****************************************************************************/
		1521	/* gensub: simple closure generation utility */
		1522
		1523	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		1524
		1525	/* create a closure from XS, returns a code reference */
		1526	/* the arg can be accessed via GENSUB_ARG from the callback */
		1527	/* the callback must use dXSARGS/XSRETURN */
		1528	static SV *
		1529	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		1530	{
		1531	CV *cv = (CV *)newSV (0);
		1532
		1533	sv_upgrade ((SV *)cv, SVt_PVCV);
		1534
		1535	CvANON_on (cv);
		1536	CvISXSUB_on (cv);
		1537	CvXSUB (cv) = xsub;
		1538	GENSUB_ARG = arg;
		1539
		1540	return newRV_noinc ((SV *)cv);
		1541	}
		1542
1505	/** Coro ********************************************************************/	1543	/** Coro ********************************************************************/
1506		1544
1507	static void	1545	INLINE void
1508	coro_enq (pTHX_ SV *coro_sv)	1546	coro_enq (pTHX_ struct coro *coro)
1509	{	1547	{
1510	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1548	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1511	}	1549	}
1512		1550
1513	static SV *	1551	INLINE SV *
1514	coro_deq (pTHX)	1552	coro_deq (pTHX)
1515	{	1553	{
1516	int prio;	1554	int prio;
1517		1555
1518	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1556	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1537	if (coro->flags & CF_READY)	1575	if (coro->flags & CF_READY)
1538	return 0;	1576	return 0;
1539		1577
1540	coro->flags |= CF_READY;	1578	coro->flags |= CF_READY;
1541		1579
1542	LOCK;
1543
1544	sv_hook = coro_nready ? 0 : coro_readyhook;	1580	sv_hook = coro_nready ? 0 : coro_readyhook;
1545	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1581	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546		1582
1547	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1583	coro_enq (aTHX_ coro);
1548	++coro_nready;	1584	++coro_nready;
1549		1585
1550	UNLOCK;
1551
1552	if (sv_hook)	1586	if (sv_hook)
1553	{	1587	{
1554	dSP;	1588	dSP;
1555		1589
1556	ENTER;	1590	ENTER;
1557	SAVETMPS;	1591	SAVETMPS;
1558		1592
1559	PUSHMARK (SP);	1593	PUSHMARK (SP);
1560	PUTBACK;	1594	PUTBACK;
1561	call_sv (sv_hook, G_DISCARD);	1595	call_sv (sv_hook, G_VOID | G_DISCARD);
1562	SPAGAIN;
1563		1596
1564	FREETMPS;	1597	FREETMPS;
1565	LEAVE;	1598	LEAVE;
1566	}	1599	}
1567		1600
…		…
1582	{	1615	{
1583	SV *prev_sv, *next_sv;	1616	SV *prev_sv, *next_sv;
1584		1617
1585	for (;;)	1618	for (;;)
1586	{	1619	{
1587	LOCK;
1588	next_sv = coro_deq (aTHX);	1620	next_sv = coro_deq (aTHX);
1589		1621
1590	/* nothing to schedule: call the idle handler */	1622	/* nothing to schedule: call the idle handler */
1591	if (expect_false (!next_sv))	1623	if (expect_false (!next_sv))
1592	{	1624	{
1593	dSP;	1625	dSP;
1594	UNLOCK;
1595		1626
1596	ENTER;	1627	ENTER;
1597	SAVETMPS;	1628	SAVETMPS;
1598		1629
1599	PUSHMARK (SP);	1630	PUSHMARK (SP);
1600	PUTBACK;	1631	PUTBACK;
1601	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1632	call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1602	SPAGAIN;
1603		1633
1604	FREETMPS;	1634	FREETMPS;
1605	LEAVE;	1635	LEAVE;
1606	continue;	1636	continue;
1607	}	1637	}
1608		1638
1609	ta->next = SvSTATE (next_sv);	1639	ta->next = SvSTATE_hv (next_sv);
1610		1640
1611	/* cannot transfer to destroyed coros, skip and look for next */	1641	/* cannot transfer to destroyed coros, skip and look for next */
1612	if (expect_false (ta->next->flags & CF_DESTROYED))	1642	if (expect_false (ta->next->flags & CF_DESTROYED))
1613	{	1643	{
1614	UNLOCK;
1615	SvREFCNT_dec (next_sv);	1644	SvREFCNT_dec (next_sv);
1616	/* coro_nready has already been taken care of by destroy */	1645	/* coro_nready has already been taken care of by destroy */
1617	continue;	1646	continue;
1618	}	1647	}
1619		1648
1620	--coro_nready;	1649	--coro_nready;
1621	UNLOCK;
1622	break;	1650	break;
1623	}	1651	}
1624		1652
1625	/* free this only after the transfer */	1653	/* free this only after the transfer */
1626	prev_sv = SvRV (coro_current);	1654	prev_sv = SvRV (coro_current);
1627	ta->prev = SvSTATE (prev_sv);	1655	ta->prev = SvSTATE_hv (prev_sv);
1628	TRANSFER_CHECK (*ta);	1656	TRANSFER_CHECK (*ta);
1629	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1657	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630	ta->next->flags &= ~CF_READY;	1658	ta->next->flags &= ~CF_READY;
1631	SvRV_set (coro_current, next_sv);	1659	SvRV_set (coro_current, next_sv);
1632		1660
1633	LOCK;
1634	free_coro_mortal (aTHX);	1661	free_coro_mortal (aTHX);
1635	coro_mortal = prev_sv;	1662	coro_mortal = prev_sv;
1636	UNLOCK;
1637	}	1663	}
1638		1664
1639	INLINE void	1665	INLINE void
1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)	1666	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641	{	1667	{
…		…
1720	else	1746	else
1721	coro->slot->runops = RUNOPS_DEFAULT;	1747	coro->slot->runops = RUNOPS_DEFAULT;
1722	}	1748	}
1723	}	1749	}
1724		1750
1725	#if 0	1751	/*****************************************************************************/
		1752	/* rouse callback */
		1753
		1754	#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
		1755
		1756	static void
		1757	coro_rouse_callback (pTHX_ CV *cv)
		1758	{
		1759	dXSARGS;
		1760	SV *data = (SV *)GENSUB_ARG;
		1761
		1762	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1763	{
		1764	/* first call, set args */
		1765	int i;
		1766	AV *av = newAV ();
		1767	SV *coro = SvRV (data);
		1768
		1769	SvRV_set (data, (SV *)av);
		1770	api_ready (aTHX_ coro);
		1771	SvREFCNT_dec (coro);
		1772
		1773	/* better take a full copy of the arguments */
		1774	while (items--)
		1775	av_store (av, items, newSVsv (ST (items)));
		1776	}
		1777
		1778	XSRETURN_EMPTY;
		1779	}
		1780
1726	static int	1781	static int
1727	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1782	slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1728	{	1783	{
1729	AV *padlist;	1784	SV *data = (SV *)frame->data;
1730	AV *av = (AV *)mg->mg_obj;	1785
		1786	if (CORO_THROW)
		1787	return 0;
1731		1788
1732	abort ();	1789	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1790	return 1;
		1791
		1792	/* now push all results on the stack */
		1793	{
		1794	dSP;
		1795	AV *av = (AV *)SvRV (data);
		1796	int i;
		1797
		1798	EXTEND (SP, AvFILLp (av) + 1);
		1799	for (i = 0; i <= AvFILLp (av); ++i)
		1800	PUSHs (sv_2mortal (AvARRAY (av)[i]));
		1801
		1802	/* we have stolen the elements, so ste length to zero and free */
		1803	AvFILLp (av) = -1;
		1804	av_undef (av);
		1805
		1806	PUTBACK;
		1807	}
1733		1808
1734	return 0;	1809	return 0;
1735	}	1810	}
1736		1811
1737	static MGVTBL coro_gensub_vtbl = {	1812	static void
1738	0, 0, 0, 0,	1813	slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1739	coro_gensub_free	1814	{
1740	};	1815	SV *cb;
1741	#endif	1816
		1817	if (items)
		1818	cb = arg [0];
		1819	else
		1820	{
		1821	struct coro *coro = SvSTATE_current;
		1822
		1823	if (!coro->rouse_cb)
		1824	croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
		1825
		1826	cb = sv_2mortal (coro->rouse_cb);
		1827	coro->rouse_cb = 0;
		1828	}
		1829
		1830	if (!SvROK (cb)
		1831	|| SvTYPE (SvRV (cb)) != SVt_PVCV
		1832	|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
		1833	croak ("Coro::rouse_wait called with illegal callback argument,");
		1834
		1835	{
		1836	CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
		1837	SV *data = (SV *)GENSUB_ARG;
		1838
		1839	frame->data = (void *)data;
		1840	frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
		1841	frame->check = slf_check_rouse_wait;
		1842	}
		1843	}
		1844
		1845	static SV *
		1846	coro_new_rouse_cb (pTHX)
		1847	{
		1848	HV *hv = (HV *)SvRV (coro_current);
		1849	struct coro *coro = SvSTATE_hv (hv);
		1850	SV *data = newRV_inc ((SV *)hv);
		1851	SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
		1852
		1853	sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
		1854	SvREFCNT_dec (data); /* magicext increases the refcount */
		1855
		1856	SvREFCNT_dec (coro->rouse_cb);
		1857	coro->rouse_cb = SvREFCNT_inc_NN (cb);
		1858
		1859	return cb;
		1860	}
		1861
		1862	/*****************************************************************************/
		1863	/* schedule-like-function opcode (SLF) */
		1864
		1865	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1866	static const CV *slf_cv;
		1867	static SV **slf_argv;
		1868	static int slf_argc, slf_arga; /* count, allocated */
		1869	static I32 slf_ax; /* top of stack, for restore */
		1870
		1871	/* this restores the stack in the case we patched the entersub, to */
		1872	/* recreate the stack frame as perl will on following calls */
		1873	/* since entersub cleared the stack */
		1874	static OP *
		1875	pp_restore (pTHX)
		1876	{
		1877	int i;
		1878	SV **SP = PL_stack_base + slf_ax;
		1879
		1880	PUSHMARK (SP);
		1881
		1882	EXTEND (SP, slf_argc + 1);
		1883
		1884	for (i = 0; i < slf_argc; ++i)
		1885	PUSHs (sv_2mortal (slf_argv [i]));
		1886
		1887	PUSHs ((SV *)CvGV (slf_cv));
		1888
		1889	RETURNOP (slf_restore.op_first);
		1890	}
		1891
		1892	static void
		1893	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1894	{
		1895	SV **arg = (SV **)slf_frame.data;
		1896
		1897	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1898	}
		1899
		1900	static void
		1901	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1902	{
		1903	if (items != 2)
		1904	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1905
		1906	frame->prepare = slf_prepare_transfer;
		1907	frame->check = slf_check_nop;
		1908	frame->data = (void *)arg; /* let's hope it will stay valid */
		1909	}
		1910
		1911	static void
		1912	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1913	{
		1914	frame->prepare = prepare_schedule;
		1915	frame->check = slf_check_nop;
		1916	}
		1917
		1918	static void
		1919	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1920	{
		1921	frame->prepare = prepare_cede;
		1922	frame->check = slf_check_nop;
		1923	}
		1924
		1925	static void
		1926	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1927	{
		1928	frame->prepare = prepare_cede_notself;
		1929	frame->check = slf_check_nop;
		1930	}
		1931
		1932	/*
		1933	* these not obviously related functions are all rolled into one
		1934	* function to increase chances that they all will call transfer with the same
		1935	* stack offset
		1936	* SLF stands for "schedule-like-function".
		1937	*/
		1938	static OP *
		1939	pp_slf (pTHX)
		1940	{
		1941	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1942
		1943	/* set up the slf frame, unless it has already been set-up */
		1944	/* the latter happens when a new coro has been started */
		1945	/* or when a new cctx was attached to an existing coroutine */
		1946	if (expect_true (!slf_frame.prepare))
		1947	{
		1948	/* first iteration */
		1949	dSP;
		1950	SV **arg = PL_stack_base + TOPMARK + 1;
		1951	int items = SP - arg; /* args without function object */
		1952	SV *gv = *sp;
		1953
		1954	/* do a quick consistency check on the "function" object, and if it isn't */
		1955	/* for us, divert to the real entersub */
		1956	if (SvTYPE (gv) != SVt_PVGV
		1957	|| !GvCV (gv)
		1958	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1959	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1960
		1961	if (!(PL_op->op_flags & OPf_STACKED))
		1962	{
		1963	/* ampersand-form of call, use @_ instead of stack */
		1964	AV *av = GvAV (PL_defgv);
		1965	arg = AvARRAY (av);
		1966	items = AvFILLp (av) + 1;
		1967	}
		1968
		1969	/* now call the init function, which needs to set up slf_frame */
		1970	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1971	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1972
		1973	/* pop args */
		1974	SP = PL_stack_base + POPMARK;
		1975
		1976	PUTBACK;
		1977	}
		1978
		1979	/* now that we have a slf_frame, interpret it! */
		1980	/* we use a callback system not to make the code needlessly */
		1981	/* complicated, but so we can run multiple perl coros from one cctx */
		1982
		1983	do
		1984	{
		1985	struct coro_transfer_args ta;
		1986
		1987	slf_frame.prepare (aTHX_ &ta);
		1988	TRANSFER (ta, 0);
		1989
		1990	checkmark = PL_stack_sp - PL_stack_base;
		1991	}
		1992	while (slf_frame.check (aTHX_ &slf_frame));
		1993
		1994	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1995
		1996	/* exception handling */
		1997	if (expect_false (CORO_THROW))
		1998	{
		1999	SV *exception = sv_2mortal (CORO_THROW);
		2000
		2001	CORO_THROW = 0;
		2002	sv_setsv (ERRSV, exception);
		2003	croak (0);
		2004	}
		2005
		2006	/* return value handling - mostly like entersub */
		2007	/* make sure we put something on the stack in scalar context */
		2008	if (GIMME_V == G_SCALAR)
		2009	{
		2010	dSP;
		2011	SV **bot = PL_stack_base + checkmark;
		2012
		2013	if (sp == bot) /* too few, push undef */
		2014	bot [1] = &PL_sv_undef;
		2015	else if (sp != bot + 1) /* too many, take last one */
		2016	bot [1] = *sp;
		2017
		2018	SP = bot + 1;
		2019
		2020	PUTBACK;
		2021	}
		2022
		2023	return NORMAL;
		2024	}
		2025
		2026	static void
		2027	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		2028	{
		2029	int i;
		2030	SV **arg = PL_stack_base + ax;
		2031	int items = PL_stack_sp - arg + 1;
		2032
		2033	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		2034
		2035	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		2036	&& PL_op->op_ppaddr != pp_slf)
		2037	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		2038
		2039	CvFLAGS (cv) |= CVf_SLF;
		2040	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		2041	slf_cv = cv;
		2042
		2043	/* we patch the op, and then re-run the whole call */
		2044	/* we have to put the same argument on the stack for this to work */
		2045	/* and this will be done by pp_restore */
		2046	slf_restore.op_next = (OP *)&slf_restore;
		2047	slf_restore.op_type = OP_CUSTOM;
		2048	slf_restore.op_ppaddr = pp_restore;
		2049	slf_restore.op_first = PL_op;
		2050
		2051	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		2052
		2053	if (PL_op->op_flags & OPf_STACKED)
		2054	{
		2055	if (items > slf_arga)
		2056	{
		2057	slf_arga = items;
		2058	free (slf_argv);
		2059	slf_argv = malloc (slf_arga * sizeof (SV *));
		2060	}
		2061
		2062	slf_argc = items;
		2063
		2064	for (i = 0; i < items; ++i)
		2065	slf_argv [i] = SvREFCNT_inc (arg [i]);
		2066	}
		2067	else
		2068	slf_argc = 0;
		2069
		2070	PL_op->op_ppaddr = pp_slf;
		2071	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		2072
		2073	PL_op = (OP *)&slf_restore;
		2074	}
1742		2075
1743	/*****************************************************************************/	2076	/*****************************************************************************/
1744	/* PerlIO::cede */	2077	/* PerlIO::cede */
1745		2078
1746	typedef struct	2079	typedef struct
…		…
1814	PerlIOBuf_get_cnt,	2147	PerlIOBuf_get_cnt,
1815	PerlIOBuf_set_ptrcnt,	2148	PerlIOBuf_set_ptrcnt,
1816	};	2149	};
1817		2150
1818	/*****************************************************************************/	2151	/*****************************************************************************/
		2152	/* Coro::Semaphore & Coro::Signal */
1819		2153
1820	static const CV *slf_cv; /* for quick consistency check */
1821
1822	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1823	static SV *slf_arg0;
1824	static SV *slf_arg1;
1825	static SV *slf_arg2;
1826
1827	/* this restores the stack in the case we patched the entersub, to */
1828	/* recreate the stack frame as perl will on following calls */
1829	/* since entersub cleared the stack */
1830	static OP *	2154	static SV *
1831	pp_restore (pTHX)	2155	coro_waitarray_new (pTHX_ int count)
1832	{	2156	{
1833	dSP;	2157	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2158	AV *av = newAV ();
		2159	SV **ary;
1834		2160
1835	PUSHMARK (SP);	2161	/* unfortunately, building manually saves memory */
		2162	Newx (ary, 2, SV *);
		2163	AvALLOC (av) = ary;
		2164	/*AvARRAY (av) = ary;*/
		2165	SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
		2166	AvMAX (av) = 1;
		2167	AvFILLp (av) = 0;
		2168	ary [0] = newSViv (count);
1836		2169
1837	EXTEND (SP, 3);	2170	return newRV_noinc ((SV *)av);
1838	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1839	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1840	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1841	PUSHs ((SV *)CvGV (slf_cv));
1842
1843	RETURNOP (slf_restore.op_first);
1844	}	2171	}
1845		2172
1846	static void	2173	/* semaphore */
1847	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1848	{
1849	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1850	}
1851		2174
1852	static void	2175	static void
1853	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)	2176	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1854	{	2177	{
1855	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));	2178	SV *count_sv = AvARRAY (av)[0];
		2179	IV count = SvIVX (count_sv);
1856		2180
1857	frame->prepare = slf_prepare_set_stacklevel;	2181	count += adjust;
1858	frame->check = slf_check_nop;	2182	SvIVX (count_sv) = count;
1859	frame->data = (void *)SvIV (arg [0]);
1860	}
1861		2183
1862	static void	2184	/* now wake up as many waiters as are expected to lock */
1863	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)	2185	while (count > 0 && AvFILLp (av) > 0)
1864	{
1865	SV **arg = (SV **)slf_frame.data;
1866
1867	prepare_transfer (ta, arg [0], arg [1]);
1868	}
1869
1870	static void
1871	slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872	{
1873	if (items != 2)
1874	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1875
1876	frame->prepare = slf_prepare_transfer;
1877	frame->check = slf_check_nop;
1878	frame->data = (void *)arg; /* let's hope it will stay valid */
1879	}
1880
1881	static void
1882	slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1883	{
1884	frame->prepare = prepare_schedule;
1885	frame->check = slf_check_nop;
1886	}
1887
1888	static void
1889	slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1890	{
1891	frame->prepare = prepare_cede;
1892	frame->check = slf_check_nop;
1893	}
1894
1895	static void
1896	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1897	{
1898	frame->prepare = prepare_cede_notself;
1899	frame->check = slf_check_nop;
1900	}
1901
1902	/* we hijack an hopefully unused CV flag for our purposes */
1903	#define CVf_SLF 0x4000
1904
1905	/*
1906	* these not obviously related functions are all rolled into one
1907	* function to increase chances that they all will call transfer with the same
1908	* stack offset
1909	* SLF stands for "schedule-like-function".
1910	*/
1911	static OP *
1912	pp_slf (pTHX)
1913	{
1914	I32 checkmark; /* mark SP to see how many elements check has pushed */
1915
1916	/* set up the slf frame, unless it has already been set-up */
1917	/* the latter happens when a new coro has been started */
1918	/* or when a new cctx was attached to an existing coroutine */
1919	if (expect_true (!slf_frame.prepare))
1920	{	2186	{
1921	/* first iteration */	2187	SV *cb;
1922	dSP;
1923	SV **arg = PL_stack_base + TOPMARK + 1;
1924	int items = SP - arg; /* args without function object */
1925	SV *gv = *sp;
1926		2188
1927	/* do a quick consistency check on the "function" object, and if it isn't */	2189	/* swap first two elements so we can shift a waiter */
1928	/* for us, divert to the real entersub */	2190	AvARRAY (av)[0] = AvARRAY (av)[1];
1929	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))	2191	AvARRAY (av)[1] = count_sv;
1930	return PL_ppaddr[OP_ENTERSUB](aTHX);	2192	cb = av_shift (av);
1931		2193
1932	/* pop args */	2194	if (SvOBJECT (cb))
1933	SP = PL_stack_base + POPMARK;
1934
1935	if (!(PL_op->op_flags & OPf_STACKED))
1936	{	2195	{
1937	/* ampersand-form of call, use @_ instead of stack */	2196	api_ready (aTHX_ cb);
1938	AV *av = GvAV (PL_defgv);	2197	--count;
1939	arg = AvARRAY (av);
1940	items = AvFILLp (av) + 1;
1941	}	2198	}
1942		2199	else if (SvTYPE (cb) == SVt_PVCV)
1943	PUTBACK;
1944
1945	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1946	}
1947
1948	/* now interpret the slf_frame */
1949	/* we use a callback system not to make the code needlessly */
1950	/* complicated, but so we can run multiple perl coros from one cctx */
1951
1952	do
1953	{
1954	struct coro_transfer_args ta;
1955
1956	slf_frame.prepare (aTHX_ &ta);
1957	TRANSFER (ta, 0);
1958
1959	checkmark = PL_stack_sp - PL_stack_base;
1960	}
1961	while (slf_frame.check (aTHX_ &slf_frame));
1962
1963	{
1964	dSP;
1965	SV **bot = PL_stack_base + checkmark;
1966	int gimme = GIMME_V;
1967
1968	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1969
1970	/* make sure we put something on the stack in scalar context */
1971	if (gimme == G_SCALAR)
1972	{	2200	{
1973	if (sp == bot)	2201	dSP;
1974	XPUSHs (&PL_sv_undef);	2202	PUSHMARK (SP);
1975		2203	XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1976	SP = bot + 1;	2204	PUTBACK;
		2205	call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1977	}	2206	}
1978		2207
1979	PUTBACK;	2208	SvREFCNT_dec (cb);
1980	}	2209	}
1981
1982	return NORMAL;
1983	}	2210	}
1984		2211
1985	static void	2212	static void
1986	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)	2213	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
1987	{	2214	{
1988	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));	2215	/* call $sem->adjust (0) to possibly wake up some other waiters */
1989		2216	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
1990	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1991	&& PL_op->op_ppaddr != pp_slf)
1992	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1993
1994	if (items > 3)
1995	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1996
1997	CvFLAGS (cv) |= CVf_SLF;
1998	CvXSUBANY (cv).any_ptr = (void *)init_cb;
1999	slf_cv = cv;
2000
2001	/* we patch the op, and then re-run the whole call */
2002	/* we have to put the same argument on the stack for this to work */
2003	/* and this will be done by pp_restore */
2004	slf_restore.op_next = (OP *)&slf_restore;
2005	slf_restore.op_type = OP_NULL;
2006	slf_restore.op_ppaddr = pp_restore;
2007	slf_restore.op_first = PL_op;
2008
2009	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2010	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2011	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
2012
2013	PL_op->op_ppaddr = pp_slf;
2014
2015	PL_op = (OP *)&slf_restore;
2016	}	2217	}
2017
2018	/*****************************************************************************/
2019		2218
2020	static int	2219	static int
2021	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)	2220	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2022	{	2221	{
2023	AV *av = (AV *)frame->data;	2222	AV *av = (AV *)frame->data;
2024	SV *count_sv = AvARRAY (av)[0];	2223	SV *count_sv = AvARRAY (av)[0];
2025		2224
		2225	/* if we are about to throw, don't actually acquire the lock, just throw */
		2226	if (CORO_THROW)
		2227	return 0;
2026	if (SvIVX (count_sv) > 0)	2228	else if (SvIVX (count_sv) > 0)
2027	{	2229	{
		2230	SvSTATE_current->on_destroy = 0;
		2231
		2232	if (acquire)
2028	SvIVX (count_sv) = SvIVX (count_sv) - 1;	2233	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2234	else
		2235	coro_semaphore_adjust (aTHX_ av, 0);
		2236
2029	return 0;	2237	return 0;
2030	}	2238	}
2031	else	2239	else
2032	{	2240	{
2033	int i;	2241	int i;
…		…
2042	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2250	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2043	return 1;	2251	return 1;
2044	}	2252	}
2045	}	2253	}
2046		2254
2047	static void	2255	static int
		2256	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2257	{
		2258	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2259	}
		2260
		2261	static int
		2262	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2263	{
		2264	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2265	}
		2266
		2267	static void
2048	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)	2268	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2049	{	2269	{
2050	AV *av = (AV *)SvRV (arg [0]);	2270	AV *av = (AV *)SvRV (arg [0]);
2051		2271
2052	if (SvIVX (AvARRAY (av)[0]) > 0)	2272	if (SvIVX (AvARRAY (av)[0]) > 0)
2053	{	2273	{
…		…
2058	{	2278	{
2059	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2279	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060		2280
2061	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));	2281	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2062	frame->prepare = prepare_schedule;	2282	frame->prepare = prepare_schedule;
2063	}
2064		2283
		2284	/* to avoid race conditions when a woken-up coro gets terminated */
		2285	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2286	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2287	}
		2288	}
		2289
		2290	static void
		2291	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2292	{
		2293	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2065	frame->check = slf_check_semaphore_down;	2294	frame->check = slf_check_semaphore_down;
2066
2067	}	2295	}
		2296
		2297	static void
		2298	slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2299	{
		2300	if (items >= 2)
		2301	{
		2302	/* callback form */
		2303	AV *av = (AV *)SvRV (arg [0]);
		2304	CV *cb_cv = coro_sv_2cv (arg [1]);
		2305
		2306	av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
		2307
		2308	if (SvIVX (AvARRAY (av)[0]) > 0)
		2309	coro_semaphore_adjust (aTHX_ av, 0);
		2310
		2311	frame->prepare = prepare_nop;
		2312	frame->check = slf_check_nop;
		2313	}
		2314	else
		2315	{
		2316	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2317	frame->check = slf_check_semaphore_wait;
		2318	}
		2319	}
		2320
		2321	/* signal */
		2322
		2323	static void
		2324	coro_signal_wake (pTHX_ AV *av, int count)
		2325	{
		2326	SvIVX (AvARRAY (av)[0]) = 0;
		2327
		2328	/* now signal count waiters */
		2329	while (count > 0 && AvFILLp (av) > 0)
		2330	{
		2331	SV *cb;
		2332
		2333	/* swap first two elements so we can shift a waiter */
		2334	cb = AvARRAY (av)[0];
		2335	AvARRAY (av)[0] = AvARRAY (av)[1];
		2336	AvARRAY (av)[1] = cb;
		2337
		2338	cb = av_shift (av);
		2339
		2340	api_ready (aTHX_ cb);
		2341	sv_setiv (cb, 0); /* signal waiter */
		2342	SvREFCNT_dec (cb);
		2343
		2344	--count;
		2345	}
		2346	}
		2347
		2348	static int
		2349	slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
		2350	{
		2351	/* if we are about to throw, also stop waiting */
		2352	return SvROK ((SV *)frame->data) && !CORO_THROW;
		2353	}
		2354
		2355	static void
		2356	slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2357	{
		2358	AV *av = (AV *)SvRV (arg [0]);
		2359
		2360	if (SvIVX (AvARRAY (av)[0]))
		2361	{
		2362	SvIVX (AvARRAY (av)[0]) = 0;
		2363	frame->prepare = prepare_nop;
		2364	frame->check = slf_check_nop;
		2365	}
		2366	else
		2367	{
		2368	SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
		2369
		2370	av_push (av, waiter);
		2371
		2372	frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
		2373	frame->prepare = prepare_schedule;
		2374	frame->check = slf_check_signal_wait;
		2375	}
		2376	}
		2377
		2378	/*****************************************************************************/
		2379	/* Coro::AIO */
		2380
		2381	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2382
		2383	/* helper storage struct */
		2384	struct io_state
		2385	{
		2386	int errorno;
		2387	I32 laststype; /* U16 in 5.10.0 */
		2388	int laststatval;
		2389	Stat_t statcache;
		2390	};
		2391
		2392	static void
		2393	coro_aio_callback (pTHX_ CV *cv)
		2394	{
		2395	dXSARGS;
		2396	AV *state = (AV *)GENSUB_ARG;
		2397	SV *coro = av_pop (state);
		2398	SV *data_sv = newSV (sizeof (struct io_state));
		2399
		2400	av_extend (state, items);
		2401
		2402	sv_upgrade (data_sv, SVt_PV);
		2403	SvCUR_set (data_sv, sizeof (struct io_state));
		2404	SvPOK_only (data_sv);
		2405
		2406	{
		2407	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2408
		2409	data->errorno = errno;
		2410	data->laststype = PL_laststype;
		2411	data->laststatval = PL_laststatval;
		2412	data->statcache = PL_statcache;
		2413	}
		2414
		2415	/* now build the result vector out of all the parameters and the data_sv */
		2416	{
		2417	int i;
		2418
		2419	for (i = 0; i < items; ++i)
		2420	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2421	}
		2422
		2423	av_push (state, data_sv);
		2424
		2425	api_ready (aTHX_ coro);
		2426	SvREFCNT_dec (coro);
		2427	SvREFCNT_dec ((AV *)state);
		2428	}
		2429
		2430	static int
		2431	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2432	{
		2433	AV *state = (AV *)frame->data;
		2434
		2435	/* if we are about to throw, return early */
		2436	/* this does not cancel the aio request, but at least */
		2437	/* it quickly returns */
		2438	if (CORO_THROW)
		2439	return 0;
		2440
		2441	/* one element that is an RV? repeat! */
		2442	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2443	return 1;
		2444
		2445	/* restore status */
		2446	{
		2447	SV *data_sv = av_pop (state);
		2448	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2449
		2450	errno = data->errorno;
		2451	PL_laststype = data->laststype;
		2452	PL_laststatval = data->laststatval;
		2453	PL_statcache = data->statcache;
		2454
		2455	SvREFCNT_dec (data_sv);
		2456	}
		2457
		2458	/* push result values */
		2459	{
		2460	dSP;
		2461	int i;
		2462
		2463	EXTEND (SP, AvFILLp (state) + 1);
		2464	for (i = 0; i <= AvFILLp (state); ++i)
		2465	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2466
		2467	PUTBACK;
		2468	}
		2469
		2470	return 0;
		2471	}
		2472
		2473	static void
		2474	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2475	{
		2476	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2477	SV *coro_hv = SvRV (coro_current);
		2478	struct coro *coro = SvSTATE_hv (coro_hv);
		2479
		2480	/* put our coroutine id on the state arg */
		2481	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2482
		2483	/* first see whether we have a non-zero priority and set it as AIO prio */
		2484	if (coro->prio)
		2485	{
		2486	dSP;
		2487
		2488	static SV *prio_cv;
		2489	static SV *prio_sv;
		2490
		2491	if (expect_false (!prio_cv))
		2492	{
		2493	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2494	prio_sv = newSViv (0);
		2495	}
		2496
		2497	PUSHMARK (SP);
		2498	sv_setiv (prio_sv, coro->prio);
		2499	XPUSHs (prio_sv);
		2500
		2501	PUTBACK;
		2502	call_sv (prio_cv, G_VOID | G_DISCARD);
		2503	}
		2504
		2505	/* now call the original request */
		2506	{
		2507	dSP;
		2508	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2509	int i;
		2510
		2511	PUSHMARK (SP);
		2512
		2513	/* first push all args to the stack */
		2514	EXTEND (SP, items + 1);
		2515
		2516	for (i = 0; i < items; ++i)
		2517	PUSHs (arg [i]);
		2518
		2519	/* now push the callback closure */
		2520	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
		2521
		2522	/* now call the AIO function - we assume our request is uncancelable */
		2523	PUTBACK;
		2524	call_sv ((SV *)req, G_VOID | G_DISCARD);
		2525	}
		2526
		2527	/* now that the requets is going, we loop toll we have a result */
		2528	frame->data = (void *)state;
		2529	frame->prepare = prepare_schedule;
		2530	frame->check = slf_check_aio_req;
		2531	}
		2532
		2533	static void
		2534	coro_aio_req_xs (pTHX_ CV *cv)
		2535	{
		2536	dXSARGS;
		2537
		2538	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2539
		2540	XSRETURN_EMPTY;
		2541	}
		2542
		2543	/*****************************************************************************/
2068		2544
2069	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2545	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2070		2546
2071	PROTOTYPES: DISABLE	2547	PROTOTYPES: DISABLE
2072		2548
2073	BOOT:	2549	BOOT:
2074	{	2550	{
2075	#ifdef USE_ITHREADS	2551	#ifdef USE_ITHREADS
2076	MUTEX_INIT (&coro_lock);
2077	# if CORO_PTHREAD	2552	# if CORO_PTHREAD
2078	coro_thx = PERL_GET_CONTEXT;	2553	coro_thx = PERL_GET_CONTEXT;
2079	# endif	2554	# endif
2080	#endif	2555	#endif
2081	BOOT_PAGESIZE;	2556	BOOT_PAGESIZE;
…		…
2101	main_mainstack = PL_mainstack;	2576	main_mainstack = PL_mainstack;
2102	main_top_env = PL_top_env;	2577	main_top_env = PL_top_env;
2103		2578
2104	while (main_top_env->je_prev)	2579	while (main_top_env->je_prev)
2105	main_top_env = main_top_env->je_prev;	2580	main_top_env = main_top_env->je_prev;
		2581
		2582	{
		2583	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2584
		2585	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2586	hv_store_ent (PL_custom_op_names, slf,
		2587	newSVpv ("coro_slf", 0), 0);
		2588
		2589	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2590	hv_store_ent (PL_custom_op_descs, slf,
		2591	newSVpv ("coro schedule like function", 0), 0);
		2592	}
2106		2593
2107	coroapi.ver = CORO_API_VERSION;	2594	coroapi.ver = CORO_API_VERSION;
2108	coroapi.rev = CORO_API_REVISION;	2595	coroapi.rev = CORO_API_REVISION;
2109		2596
2110	coroapi.transfer = api_transfer;	2597	coroapi.transfer = api_transfer;
…		…
2128	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	2615	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2129	}	2616	}
2130		2617
2131	SV *	2618	SV *
2132	new (char *klass, ...)	2619	new (char *klass, ...)
		2620	ALIAS:
		2621	Coro::new = 1
2133	CODE:	2622	CODE:
2134	{	2623	{
2135	struct coro *coro;	2624	struct coro *coro;
2136	MAGIC *mg;	2625	MAGIC *mg;
2137	HV *hv;	2626	HV *hv;
		2627	CV *cb;
2138	int i;	2628	int i;
		2629
		2630	if (items > 1)
		2631	{
		2632	cb = coro_sv_2cv (ST (1));
		2633
		2634	if (CvISXSUB (cb))
		2635	croak ("Coro::State doesn't support XS functions as coroutine start, caught");
		2636
		2637	if (!CvROOT (cb))
		2638	croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
		2639	}
2139		2640
2140	Newz (0, coro, 1, struct coro);	2641	Newz (0, coro, 1, struct coro);
2141	coro->args = newAV ();	2642	coro->args = newAV ();
2142	coro->flags = CF_NEW;	2643	coro->flags = CF_NEW;
2143		2644
…		…
2148	coro->hv = hv = newHV ();	2649	coro->hv = hv = newHV ();
2149	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);	2650	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2150	mg->mg_flags |= MGf_DUP;	2651	mg->mg_flags |= MGf_DUP;
2151	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	2652	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2152		2653
		2654	if (items > 1)
		2655	{
2153	av_extend (coro->args, items - 1);	2656	av_extend (coro->args, items - 1 + ix);
		2657
		2658	if (ix)
		2659	{
		2660	av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
		2661	cb = coro_run_cv;
		2662	}
		2663
		2664	coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
		2665
2154	for (i = 1; i < items; i++)	2666	for (i = 2; i < items; i++)
2155	av_push (coro->args, newSVsv (ST (i)));	2667	av_push (coro->args, newSVsv (ST (i)));
		2668	}
2156	}	2669	}
2157	OUTPUT:	2670	OUTPUT:
2158	RETVAL	2671	RETVAL
2159
2160	void
2161	_set_stacklevel (...)
2162	CODE:
2163	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2164		2672
2165	void	2673	void
2166	transfer (...)	2674	transfer (...)
2167	PROTOTYPE: $$	2675	PROTOTYPE: $$
2168	CODE:	2676	CODE:
2169	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);	2677	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2170		2678
2171	bool	2679	bool
2172	_destroy (SV *coro_sv)	2680	_destroy (SV *coro_sv)
2173	CODE:	2681	CODE:
2174	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2682	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2292		2800
2293	void	2801	void
2294	throw (Coro::State self, SV *throw = &PL_sv_undef)	2802	throw (Coro::State self, SV *throw = &PL_sv_undef)
2295	PROTOTYPE: $;$	2803	PROTOTYPE: $;$
2296	CODE:	2804	CODE:
		2805	{
		2806	struct coro *current = SvSTATE_current;
		2807	SV **throwp = self == current ? &CORO_THROW : &self->except;
2297	SvREFCNT_dec (self->throw);	2808	SvREFCNT_dec (*throwp);
2298	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2809	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2810	}
2299		2811
2300	void	2812	void
2301	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2813	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2302	PROTOTYPE: $;$	2814	PROTOTYPE: $;$
2303	C_ARGS: aTHX_ coro, flags	2815	C_ARGS: aTHX_ coro, flags
…		…
2334		2846
2335	void	2847	void
2336	force_cctx ()	2848	force_cctx ()
2337	PROTOTYPE:	2849	PROTOTYPE:
2338	CODE:	2850	CODE:
2339	struct coro *coro = SvSTATE (coro_current);
2340	coro->cctx->idle_sp = 0;	2851	SvSTATE_current->cctx->idle_sp = 0;
2341		2852
2342	void	2853	void
2343	swap_defsv (Coro::State self)	2854	swap_defsv (Coro::State self)
2344	PROTOTYPE: $	2855	PROTOTYPE: $
2345	ALIAS:	2856	ALIAS:
…		…
2353	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2864	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2354		2865
2355	SV *tmp = *src; *src = *dst; *dst = tmp;	2866	SV *tmp = *src; *src = *dst; *dst = tmp;
2356	}	2867	}
2357		2868
		2869
2358	MODULE = Coro::State PACKAGE = Coro	2870	MODULE = Coro::State PACKAGE = Coro
2359		2871
2360	BOOT:	2872	BOOT:
2361	{	2873	{
2362	int i;	2874	int i;
2363		2875
2364	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);	2876	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2365	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);	2877	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2366	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);	2878	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2367		2879	coro_run_cv = get_cv (aTHX_ "Coro::_terminate", GV_ADD);
2368	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);	2880	coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2369	SvREADONLY_on (coro_current);	2881	SvREADONLY_on (coro_current);
2370		2882
2371	coro_stash = gv_stashpv ("Coro", TRUE);	2883	coro_stash = gv_stashpv ("Coro", TRUE);
2372		2884
2373	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	2885	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
…		…
2389	coroapi.ready = api_ready;	2901	coroapi.ready = api_ready;
2390	coroapi.is_ready = api_is_ready;	2902	coroapi.is_ready = api_is_ready;
2391	coroapi.nready = coro_nready;	2903	coroapi.nready = coro_nready;
2392	coroapi.current = coro_current;	2904	coroapi.current = coro_current;
2393		2905
2394	GCoroAPI = &coroapi;	2906	/*GCoroAPI = &coroapi;*/
2395	sv_setiv (sv, (IV)&coroapi);	2907	sv_setiv (sv, (IV)&coroapi);
2396	SvREADONLY_on (sv);	2908	SvREADONLY_on (sv);
2397	}	2909	}
2398	}	2910	}
2399		2911
2400	void	2912	void
2401	schedule (...)	2913	schedule (...)
2402	CODE:	2914	CODE:
2403	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);	2915	CORO_EXECUTE_SLF_XS (slf_init_schedule);
2404		2916
2405	void	2917	void
2406	cede (...)	2918	cede (...)
2407	CODE:	2919	CODE:
2408	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);	2920	CORO_EXECUTE_SLF_XS (slf_init_cede);
2409		2921
2410	void	2922	void
2411	cede_notself (...)	2923	cede_notself (...)
2412	CODE:	2924	CODE:
2413	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);	2925	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2414		2926
2415	void	2927	void
2416	_set_current (SV *current)	2928	_set_current (SV *current)
2417	PROTOTYPE: $	2929	PROTOTYPE: $
2418	CODE:	2930	CODE:
…		…
2421		2933
2422	void	2934	void
2423	_set_readyhook (SV *hook)	2935	_set_readyhook (SV *hook)
2424	PROTOTYPE: $	2936	PROTOTYPE: $
2425	CODE:	2937	CODE:
2426	LOCK;
2427	SvREFCNT_dec (coro_readyhook);	2938	SvREFCNT_dec (coro_readyhook);
2428	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2939	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2429	UNLOCK;
2430		2940
2431	int	2941	int
2432	prio (Coro::State coro, int newprio = 0)	2942	prio (Coro::State coro, int newprio = 0)
2433	PROTOTYPE: $;$	2943	PROTOTYPE: $;$
2434	ALIAS:	2944	ALIAS:
…		…
2470	# for async_pool speedup	2980	# for async_pool speedup
2471	void	2981	void
2472	_pool_1 (SV *cb)	2982	_pool_1 (SV *cb)
2473	CODE:	2983	CODE:
2474	{	2984	{
2475	struct coro *coro = SvSTATE (coro_current);
2476	HV *hv = (HV *)SvRV (coro_current);	2985	HV *hv = (HV *)SvRV (coro_current);
		2986	struct coro *coro = SvSTATE_hv ((SV *)hv);
2477	AV *defav = GvAV (PL_defgv);	2987	AV *defav = GvAV (PL_defgv);
2478	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2988	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2479	AV *invoke_av;	2989	AV *invoke_av;
2480	int i, len;	2990	int i, len;
2481		2991
…		…
2508		3018
2509	void	3019	void
2510	_pool_2 (SV *cb)	3020	_pool_2 (SV *cb)
2511	CODE:	3021	CODE:
2512	{	3022	{
2513	struct coro *coro = SvSTATE (coro_current);	3023	HV *hv = (HV *)SvRV (coro_current);
		3024	struct coro *coro = SvSTATE_hv ((SV *)hv);
2514		3025
2515	sv_setsv (cb, &PL_sv_undef);	3026	sv_setsv (cb, &PL_sv_undef);
2516		3027
2517	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	3028	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2518	coro->saved_deffh = 0;	3029	coro->saved_deffh = 0;
…		…
2525	SvREFCNT_dec (old);	3036	SvREFCNT_dec (old);
2526	croak ("\3async_pool terminate\2\n");	3037	croak ("\3async_pool terminate\2\n");
2527	}	3038	}
2528		3039
2529	av_clear (GvAV (PL_defgv));	3040	av_clear (GvAV (PL_defgv));
2530	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	3041	hv_store (hv, "desc", sizeof ("desc") - 1,
2531	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	3042	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2532		3043
2533	coro->prio = 0;	3044	coro->prio = 0;
2534		3045
2535	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	3046	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2536	api_trace (aTHX_ coro_current, 0);	3047	api_trace (aTHX_ coro_current, 0);
2537		3048
2538	av_push (av_async_pool, newSVsv (coro_current));	3049	av_push (av_async_pool, newSVsv (coro_current));
2539	}	3050	}
2540		3051
2541	#if 0
2542
2543	void
2544	_generator_call (...)
2545	PROTOTYPE: @
2546	PPCODE:
2547	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2548	xxxx
2549	abort ();
2550
2551	SV *	3052	SV *
2552	gensub (SV *sub, ...)	3053	rouse_cb ()
2553	PROTOTYPE: &;@	3054	PROTOTYPE:
2554	CODE:	3055	CODE:
2555	{	3056	RETVAL = coro_new_rouse_cb (aTHX);
2556	struct coro *coro;
2557	MAGIC *mg;
2558	CV *xcv;
2559	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2560	int i;
2561
2562	CvGV (ncv) = CvGV (cv);
2563	CvFILE (ncv) = CvFILE (cv);
2564
2565	Newz (0, coro, 1, struct coro);
2566	coro->args = newAV ();
2567	coro->flags = CF_NEW;
2568
2569	av_extend (coro->args, items - 1);
2570	for (i = 1; i < items; i++)
2571	av_push (coro->args, newSVsv (ST (i)));
2572
2573	CvISXSUB_on (ncv);
2574	CvXSUBANY (ncv).any_ptr = (void *)coro;
2575
2576	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2577
2578	CvXSUB (ncv) = CvXSUB (xcv);
2579	CvANON_on (ncv);
2580
2581	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2582	RETVAL = newRV_noinc ((SV *)ncv);
2583	}
2584	OUTPUT:	3057	OUTPUT:
2585	RETVAL	3058	RETVAL
2586		3059
2587	#endif
2588
2589
2590	MODULE = Coro::State PACKAGE = Coro::AIO
2591
2592	void	3060	void
2593	_get_state (SV *self)	3061	rouse_wait (...)
2594	PROTOTYPE: $	3062	PROTOTYPE: ;$
2595	PPCODE:	3063	PPCODE:
2596	{	3064	CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2597	AV *defav = GvAV (PL_defgv);
2598	AV *av = newAV ();
2599	int i;
2600	SV *data_sv = newSV (sizeof (struct io_state));
2601	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2602	SvCUR_set (data_sv, sizeof (struct io_state));
2603	SvPOK_only (data_sv);
2604
2605	data->errorno = errno;
2606	data->laststype = PL_laststype;
2607	data->laststatval = PL_laststatval;
2608	data->statcache = PL_statcache;
2609
2610	av_extend (av, AvFILLp (defav) + 1 + 1);
2611
2612	for (i = 0; i <= AvFILLp (defav); ++i)
2613	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2614
2615	av_push (av, data_sv);
2616
2617	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2618
2619	api_ready (aTHX_ self);
2620	}
2621
2622	void
2623	_set_state (SV *state)
2624	PROTOTYPE: $
2625	PPCODE:
2626	{
2627	AV *av = (AV *)SvRV (state);
2628	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2629	int i;
2630
2631	errno = data->errorno;
2632	PL_laststype = data->laststype;
2633	PL_laststatval = data->laststatval;
2634	PL_statcache = data->statcache;
2635
2636	EXTEND (SP, AvFILLp (av));
2637	for (i = 0; i < AvFILLp (av); ++i)
2638	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2639	}
2640
2641
2642	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2643
2644	BOOT:
2645	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2646
2647	SV *
2648	_schedule (...)
2649	CODE:
2650	{
2651	static int incede;
2652
2653	api_cede_notself (aTHX);
2654
2655	++incede;
2656	while (coro_nready >= incede && api_cede (aTHX))
2657	;
2658
2659	sv_setsv (sv_activity, &PL_sv_undef);
2660	if (coro_nready >= incede)
2661	{
2662	PUSHMARK (SP);
2663	PUTBACK;
2664	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2665	SPAGAIN;
2666	}
2667
2668	--incede;
2669	}
2670		3065
2671		3066
2672	MODULE = Coro::State PACKAGE = PerlIO::cede	3067	MODULE = Coro::State PACKAGE = PerlIO::cede
2673		3068
2674	BOOT:	3069	BOOT:
2675	PerlIO_define_layer (aTHX_ &PerlIO_cede);	3070	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2676		3071
		3072
2677	MODULE = Coro::State PACKAGE = Coro::Semaphore	3073	MODULE = Coro::State PACKAGE = Coro::Semaphore
2678		3074
2679	SV *	3075	SV *
2680	new (SV *klass, SV *count_ = 0)	3076	new (SV *klass, SV *count = 0)
2681	CODE:	3077	CODE:
2682	{	3078	RETVAL = sv_bless (
2683	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */	3079	coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
2684	AV *av = newAV ();	3080	GvSTASH (CvGV (cv))
2685	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));	3081	);
2686	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));	3082	OUTPUT:
2687	}	3083	RETVAL
		3084
		3085	# helper for Coro::Channel
		3086	SV *
		3087	_alloc (int count)
		3088	CODE:
		3089	RETVAL = coro_waitarray_new (aTHX_ count);
2688	OUTPUT:	3090	OUTPUT:
2689	RETVAL	3091	RETVAL
2690		3092
2691	SV *	3093	SV *
2692	count (SV *self)	3094	count (SV *self)
…		…
2698	void	3100	void
2699	up (SV *self, int adjust = 1)	3101	up (SV *self, int adjust = 1)
2700	ALIAS:	3102	ALIAS:
2701	adjust = 1	3103	adjust = 1
2702	CODE:	3104	CODE:
2703	{	3105	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2704	AV *av = (AV *)SvRV (self);
2705	SV *count_sv = AvARRAY (av)[0];
2706	IV count = SvIVX (count_sv);
2707
2708	count += ix ? adjust : 1;
2709	SvIVX (count_sv) = count;
2710
2711	/* now wake up as many waiters as possible */
2712	while (count > 0 && AvFILLp (av) >= count)
2713	{
2714	SV *cb;
2715
2716	/* swap first two elements so we can shift a waiter */
2717	AvARRAY (av)[0] = AvARRAY (av)[1];
2718	AvARRAY (av)[1] = count_sv;
2719	cb = av_shift (av);
2720
2721	if (SvOBJECT (cb))
2722	api_ready (cb);
2723	else
2724	croak ("callbacks not yet supported");
2725
2726	SvREFCNT_dec (cb);
2727	}
2728	}
2729		3106
2730	void	3107	void
2731	down (SV *self)	3108	down (...)
2732	CODE:	3109	CODE:
2733	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);	3110	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		3111
		3112	void
		3113	wait (...)
		3114	CODE:
		3115	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2734		3116
2735	void	3117	void
2736	try (SV *self)	3118	try (SV *self)
2737	PPCODE:	3119	PPCODE:
2738	{	3120	{
…		…
2750	XSRETURN_NO;	3132	XSRETURN_NO;
2751	}	3133	}
2752		3134
2753	void	3135	void
2754	waiters (SV *self)	3136	waiters (SV *self)
2755	CODE:	3137	PPCODE:
2756	{	3138	{
2757	AV *av = (AV *)SvRV (self);	3139	AV *av = (AV *)SvRV (self);
		3140	int wcount = AvFILLp (av) + 1 - 1;
2758		3141
2759	if (GIMME_V == G_SCALAR)	3142	if (GIMME_V == G_SCALAR)
2760	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));	3143	XPUSHs (sv_2mortal (newSViv (wcount)));
2761	else	3144	else
2762	{	3145	{
2763	int i;	3146	int i;
2764	EXTEND (SP, AvFILLp (av) + 1 - 1);	3147	EXTEND (SP, wcount);
2765	for (i = 1; i <= AvFILLp (av); ++i)	3148	for (i = 1; i <= wcount; ++i)
2766	PUSHs (newSVsv (AvARRAY (av)[i]));	3149	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2767	}	3150	}
2768	}	3151	}
2769		3152
		3153	MODULE = Coro::State PACKAGE = Coro::Signal
		3154
		3155	SV *
		3156	new (SV *klass)
		3157	CODE:
		3158	RETVAL = sv_bless (
		3159	coro_waitarray_new (aTHX_ 0),
		3160	GvSTASH (CvGV (cv))
		3161	);
		3162	OUTPUT:
		3163	RETVAL
		3164
		3165	void
		3166	wait (...)
		3167	CODE:
		3168	CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
		3169
		3170	void
		3171	broadcast (SV *self)
		3172	CODE:
		3173	{
		3174	AV *av = (AV *)SvRV (self);
		3175	coro_signal_wake (aTHX_ av, AvFILLp (av));
		3176	}
		3177
		3178	void
		3179	send (SV *self)
		3180	CODE:
		3181	{
		3182	AV *av = (AV *)SvRV (self);
		3183
		3184	if (AvFILLp (av))
		3185	coro_signal_wake (aTHX_ av, 1);
		3186	else
		3187	SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
		3188	}
		3189
		3190	IV
		3191	awaited (SV *self)
		3192	CODE:
		3193	RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
		3194	OUTPUT:
		3195	RETVAL
		3196
		3197
		3198	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		3199
		3200	BOOT:
		3201	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		3202
		3203	void
		3204	_schedule (...)
		3205	CODE:
		3206	{
		3207	static int incede;
		3208
		3209	api_cede_notself (aTHX);
		3210
		3211	++incede;
		3212	while (coro_nready >= incede && api_cede (aTHX))
		3213	;
		3214
		3215	sv_setsv (sv_activity, &PL_sv_undef);
		3216	if (coro_nready >= incede)
		3217	{
		3218	PUSHMARK (SP);
		3219	PUTBACK;
		3220	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		3221	}
		3222
		3223	--incede;
		3224	}
		3225
		3226
		3227	MODULE = Coro::State PACKAGE = Coro::AIO
		3228
		3229	void
		3230	_register (char *target, char *proto, SV *req)
		3231	CODE:
		3232	{
		3233	CV *req_cv = coro_sv_2cv (req);
		3234	/* newXSproto doesn't return the CV on 5.8 */
		3235	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		3236	sv_setpv ((SV *)slf_cv, proto);
		3237	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		3238	}
		3239

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