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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.285 by root, Mon Nov 17 04:17:20 2008 UTC vs.
Revision 1.313 by root, Thu Nov 20 03:22:59 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
…		…
55		55
56	#define PERL_VERSION_ATLEAST(a,b,c) \	56	#define PERL_VERSION_ATLEAST(a,b,c) \
57	(PERL_REVISION > (a) \	57	(PERL_REVISION > (a) \
58	|| (PERL_REVISION == (a) \	58	|| (PERL_REVISION == (a) \
59	&& (PERL_VERSION > (b) \	59	&& (PERL_VERSION > (b) \
60	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))	60	|| (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61		61
62	#if !PERL_VERSION_ATLEAST (5,6,0)	62	#if !PERL_VERSION_ATLEAST (5,6,0)
63	# ifndef PL_ppaddr	63	# ifndef PL_ppaddr
64	# define PL_ppaddr ppaddr	64	# define PL_ppaddr ppaddr
65	# endif	65	# endif
…		…
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	# if CORO_PTHREAD	153	# if CORO_PTHREAD
148	static void *coro_thx;	154	static void *coro_thx;
149	# endif	155	# endif
150	#endif	156	#endif
151		157
152	/* helper storage struct for Coro::AIO */
153	struct io_state
154	{
155	AV *res;
156	int errorno;
157	I32 laststype; /* U16 in 5.10.0 */
158	int laststatval;
159	Stat_t statcache;
160	};
161
162	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);
163		163
164	static U32 cctx_gen;	164	static U32 cctx_gen;
165	static size_t cctx_stacksize = CORO_STACKSIZE;	165	static size_t cctx_stacksize = CORO_STACKSIZE;
166	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
167	static AV *main_mainstack; /* used to differentiate between $main and others */	167	static AV *main_mainstack; /* used to differentiate between $main and others */
…		…
176	static HV *hv_sig; /* %SIG */	176	static HV *hv_sig; /* %SIG */
177		177
178	/* async_pool helper stuff */	178	/* async_pool helper stuff */
179	static SV *sv_pool_rss;	179	static SV *sv_pool_rss;
180	static SV *sv_pool_size;	180	static SV *sv_pool_size;
		181	static SV *sv_async_pool_idle;
181	static AV *av_async_pool;	182	static AV *av_async_pool;
		183	static SV *sv_Coro;
		184	static CV *cv_pool_handler;
		185	static CV *cv_coro_new;
182		186
183	/* Coro::AnyEvent */	187	/* Coro::AnyEvent */
184	static SV *sv_activity;	188	static SV *sv_activity;
185		189
186	static struct coro_cctx *cctx_first;	190	static struct coro_cctx *cctx_first;
…		…
246	/* state data */	250	/* state data */
247	struct CoroSLF slf_frame; /* saved slf frame */	251	struct CoroSLF slf_frame; /* saved slf frame */
248	AV *mainstack;	252	AV *mainstack;
249	perl_slots *slot; /* basically the saved sp */	253	perl_slots *slot; /* basically the saved sp */
250		254
		255	CV *startcv; /* the CV to execute */
251	AV *args; /* data associated with this coroutine (initial args) */	256	AV *args; /* data associated with this coroutine (initial args) */
252	int refcnt; /* coroutines are refcounted, yes */	257	int refcnt; /* coroutines are refcounted, yes */
253	int flags; /* CF_ flags */	258	int flags; /* CF_ flags */
254	HV *hv; /* the perl hash associated with this coro, if any */	259	HV *hv; /* the perl hash associated with this coro, if any */
255	void (*on_destroy)(pTHX_ struct coro *coro);	260	void (*on_destroy)(pTHX_ struct coro *coro);
256		261
257	/* statistics */	262	/* statistics */
258	int usecount; /* number of transfers to this coro */	263	int usecount; /* number of transfers to this coro */
259		264
260	/* coro process data */	265	/* coro process data */
261	int prio;	266	int prio;
262	SV *throw; /* exception to be thrown */	267	SV *except; /* exception to be thrown */
		268	SV *rouse_cb;
263		269
264	/* async_pool */	270	/* async_pool */
265	SV *saved_deffh;	271	SV *saved_deffh;
		272	SV *invoke_cb;
		273	AV *invoke_av;
266		274
267	/* linked list */	275	/* linked list */
268	struct coro *next, *prev;	276	struct coro *next, *prev;
269	};	277	};
270		278
…		…
273		281
274	/* the following variables are effectively part of the perl context */	282	/* the following variables are effectively part of the perl context */
275	/* and get copied between struct coro and these variables */	283	/* and get copied between struct coro and these variables */
276	/* the mainr easonw e don't support windows process emulation */	284	/* the mainr easonw e don't support windows process emulation */
277	static struct CoroSLF slf_frame; /* the current slf frame */	285	static struct CoroSLF slf_frame; /* the current slf frame */
278	static SV *coro_throw;
279		286
280	/** Coro ********************************************************************/	287	/** Coro ********************************************************************/
281		288
282	#define PRIO_MAX 3	289	#define PRIO_MAX 3
283	#define PRIO_HIGH 1	290	#define PRIO_HIGH 1
…		…
288		295
289	/* for Coro.pm */	296	/* for Coro.pm */
290	static SV *coro_current;	297	static SV *coro_current;
291	static SV *coro_readyhook;	298	static SV *coro_readyhook;
292	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	299	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
		300	static CV *cv_coro_run, *cv_coro_terminate;
293	static struct coro *coro_first;	301	static struct coro *coro_first;
294	#define coro_nready coroapi.nready	302	#define coro_nready coroapi.nready
295		303
296	/** lowlevel stuff **********************************************************/	304	/** lowlevel stuff **********************************************************/
297		305
…		…
321	#if PERL_VERSION_ATLEAST (5,10,0)	329	#if PERL_VERSION_ATLEAST (5,10,0)
322	/* silence stupid and wrong 5.10 warning that I am unable to switch off */	330	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
323	get_hv (name, create);	331	get_hv (name, create);
324	#endif	332	#endif
325	return get_hv (name, create);	333	return get_hv (name, create);
		334	}
		335
		336	/* may croak */
		337	INLINE CV *
		338	coro_sv_2cv (pTHX_ SV *sv)
		339	{
		340	HV *st;
		341	GV *gvp;
		342	return sv_2cv (sv, &st, &gvp, 0);
326	}	343	}
327		344
328	static AV *	345	static AV *
329	coro_clone_padlist (pTHX_ CV *cv)	346	coro_clone_padlist (pTHX_ CV *cv)
330	{	347	{
…		…
384	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	401	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
385		402
386	return 0;	403	return 0;
387	}	404	}
388		405
389	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	406	#define CORO_MAGIC_type_cv 26
390	#define CORO_MAGIC_type_state PERL_MAGIC_ext	407	#define CORO_MAGIC_type_state PERL_MAGIC_ext
391		408
392	static MGVTBL coro_cv_vtbl = {	409	static MGVTBL coro_cv_vtbl = {
393	0, 0, 0, 0,	410	0, 0, 0, 0,
394	coro_cv_free	411	coro_cv_free
395	};	412	};
396		413
		414	#define CORO_MAGIC_NN(sv, type) \
		415	(expect_true (SvMAGIC (sv)->mg_type == type) \
		416	? SvMAGIC (sv) \
		417	: mg_find (sv, type))
		418
397	#define CORO_MAGIC(sv, type) \	419	#define CORO_MAGIC(sv, type) \
398	expect_true (SvMAGIC (sv)) \	420	(expect_true (SvMAGIC (sv)) \
399	? expect_true (SvMAGIC (sv)->mg_type == type) \	421	? CORO_MAGIC_NN (sv, type) \
400	? SvMAGIC (sv) \
401	: mg_find (sv, type) \
402	: 0	422	: 0)
403		423
404	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	424	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
405	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	425	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
406		426
407	INLINE struct coro *	427	INLINE struct coro *
408	SvSTATE_ (pTHX_ SV *coro)	428	SvSTATE_ (pTHX_ SV *coro)
409	{	429	{
410	HV *stash;	430	HV *stash;
…		…
428	return (struct coro *)mg->mg_ptr;	448	return (struct coro *)mg->mg_ptr;
429	}	449	}
430		450
431	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	451	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432		452
433	/* fastert than SvSTATE, but expects a coroutine hv */	453	/* faster than SvSTATE, but expects a coroutine hv */
434	INLINE struct coro *	454	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
435	SvSTATE_hv (SV *sv)
436	{
437	MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
438	? SvMAGIC (sv)
439	: mg_find (sv, CORO_MAGIC_type_state);
440
441	return (struct coro *)mg->mg_ptr;
442	}
443
444	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))	455	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
445		456
446	/* the next two functions merely cache the padlists */	457	/* the next two functions merely cache the padlists */
447	static void	458	static void
448	get_padlist (pTHX_ CV *cv)	459	get_padlist (pTHX_ CV *cv)
…		…
455	else	466	else
456	{	467	{
457	#if CORO_PREFER_PERL_FUNCTIONS	468	#if CORO_PREFER_PERL_FUNCTIONS
458	/* this is probably cleaner? but also slower! */	469	/* this is probably cleaner? but also slower! */
459	/* in practise, it seems to be less stable */	470	/* in practise, it seems to be less stable */
460	CV *cp = Perl_cv_clone (cv);	471	CV *cp = Perl_cv_clone (aTHX_ cv);
461	CvPADLIST (cv) = CvPADLIST (cp);	472	CvPADLIST (cv) = CvPADLIST (cp);
462	CvPADLIST (cp) = 0;	473	CvPADLIST (cp) = 0;
463	SvREFCNT_dec (cp);	474	SvREFCNT_dec (cp);
464	#else	475	#else
465	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	476	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
518		529
519	PUTBACK;	530	PUTBACK;
520	}	531	}
521		532
522	slf_frame = c->slf_frame;	533	slf_frame = c->slf_frame;
523	coro_throw = c->throw;	534	CORO_THROW = c->except;
524	}	535	}
525		536
526	static void	537	static void
527	save_perl (pTHX_ Coro__State c)	538	save_perl (pTHX_ Coro__State c)
528	{	539	{
529	c->throw = coro_throw;	540	c->except = CORO_THROW;
530	c->slf_frame = slf_frame;	541	c->slf_frame = slf_frame;
531		542
532	{	543	{
533	dSP;	544	dSP;
534	I32 cxix = cxstack_ix;	545	I32 cxix = cxstack_ix;
…		…
609	* of perl.c:init_stacks, except that it uses less memory	620	* of perl.c:init_stacks, except that it uses less memory
610	* on the (sometimes correct) assumption that coroutines do	621	* on the (sometimes correct) assumption that coroutines do
611	* not usually need a lot of stackspace.	622	* not usually need a lot of stackspace.
612	*/	623	*/
613	#if CORO_PREFER_PERL_FUNCTIONS	624	#if CORO_PREFER_PERL_FUNCTIONS
614	# define coro_init_stacks init_stacks	625	# define coro_init_stacks(thx) init_stacks ()
615	#else	626	#else
616	static void	627	static void
617	coro_init_stacks (pTHX)	628	coro_init_stacks (pTHX)
618	{	629	{
619	PL_curstackinfo = new_stackinfo(32, 8);	630	PL_curstackinfo = new_stackinfo(32, 8);
…		…
682	#if !PERL_VERSION_ATLEAST (5,10,0)	693	#if !PERL_VERSION_ATLEAST (5,10,0)
683	Safefree (PL_retstack);	694	Safefree (PL_retstack);
684	#endif	695	#endif
685	}	696	}
686		697
		698	#define CORO_RSS \
		699	rss += sizeof (SYM (curstackinfo)); \
		700	rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
		701	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
		702	rss += SYM (tmps_max) * sizeof (SV *); \
		703	rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
		704	rss += SYM (scopestack_max) * sizeof (I32); \
		705	rss += SYM (savestack_max) * sizeof (ANY);
		706
687	static size_t	707	static size_t
688	coro_rss (pTHX_ struct coro *coro)	708	coro_rss (pTHX_ struct coro *coro)
689	{	709	{
690	size_t rss = sizeof (*coro);	710	size_t rss = sizeof (*coro);
691		711
692	if (coro->mainstack)	712	if (coro->mainstack)
693	{	713	{
694	perl_slots tmp_slot;
695	perl_slots *slot;
696
697	if (coro->flags & CF_RUNNING)	714	if (coro->flags & CF_RUNNING)
698	{	715	{
699	slot = &tmp_slot;	716	#define SYM(sym) PL_ ## sym
700		717	CORO_RSS;
701	#define VAR(name,type) slot->name = PL_ ## name;
702	# include "state.h"
703	#undef VAR	718	#undef SYM
704	}	719	}
705	else	720	else
706	slot = coro->slot;
707
708	if (slot)
709	{	721	{
710	rss += sizeof (slot->curstackinfo);	722	#define SYM(sym) coro->slot->sym
711	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	723	CORO_RSS;
712	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);	724	#undef SYM
713	rss += slot->tmps_max * sizeof (SV *);
714	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
715	rss += slot->scopestack_max * sizeof (I32);
716	rss += slot->savestack_max * sizeof (ANY);
717
718	#if !PERL_VERSION_ATLEAST (5,10,0)
719	rss += slot->retstack_max * sizeof (OP *);
720	#endif
721	}	725	}
722	}	726	}
723		727
724	return rss;	728	return rss;
725	}	729	}
…		…
826	static int	830	static int
827	slf_check_nop (pTHX_ struct CoroSLF *frame)	831	slf_check_nop (pTHX_ struct CoroSLF *frame)
828	{	832	{
829	return 0;	833	return 0;
830	}	834	}
		835
		836	static UNOP coro_setup_op;
831		837
832	static void NOINLINE /* noinline to keep it out of the transfer fast path */	838	static void NOINLINE /* noinline to keep it out of the transfer fast path */
833	coro_setup (pTHX_ struct coro *coro)	839	coro_setup (pTHX_ struct coro *coro)
834	{	840	{
835	/*	841	/*
…		…
864	{	870	{
865	dSP;	871	dSP;
866	UNOP myop;	872	UNOP myop;
867		873
868	Zero (&myop, 1, UNOP);	874	Zero (&myop, 1, UNOP);
869	myop.op_next = Nullop;	875	myop.op_next = Nullop;
		876	myop.op_type = OP_ENTERSUB;
870	myop.op_flags = OPf_WANT_VOID;	877	myop.op_flags = OPf_WANT_VOID;
871		878
872	PUSHMARK (SP);	879	PUSHMARK (SP);
873	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	880	PUSHs ((SV *)coro->startcv);
874	PUTBACK;	881	PUTBACK;
875	PL_op = (OP *)&myop;	882	PL_op = (OP *)&myop;
876	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	883	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
877	SPAGAIN;
878	}	884	}
879		885
880	/* this newly created coroutine might be run on an existing cctx which most	886	/* this newly created coroutine might be run on an existing cctx which most
881	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.	887	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
882	*/	888	*/
883	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */	889	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
884	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */	890	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
885		891
886	coro_throw = coro->throw;	892	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		893	coro_setup_op.op_next = PL_op;
		894	coro_setup_op.op_type = OP_CUSTOM;
		895	coro_setup_op.op_ppaddr = pp_slf;
		896	/* no flags etc. required, as an init function won't be called */
		897
		898	PL_op = (OP *)&coro_setup_op;
		899
		900	/* copy throw, in case it was set before coro_setup */
		901	CORO_THROW = coro->except;
887	}	902	}
888		903
889	static void	904	static void
890	coro_destruct (pTHX_ struct coro *coro)	905	coro_destruct (pTHX_ struct coro *coro)
891	{	906	{
…		…
915		930
916	SvREFCNT_dec (PL_diehook);	931	SvREFCNT_dec (PL_diehook);
917	SvREFCNT_dec (PL_warnhook);	932	SvREFCNT_dec (PL_warnhook);
918		933
919	SvREFCNT_dec (coro->saved_deffh);	934	SvREFCNT_dec (coro->saved_deffh);
920	SvREFCNT_dec (coro_throw);	935	SvREFCNT_dec (coro->rouse_cb);
		936	SvREFCNT_dec (coro->invoke_cb);
		937	SvREFCNT_dec (coro->invoke_av);
921		938
922	coro_destruct_stacks (aTHX);	939	coro_destruct_stacks (aTHX);
923	}	940	}
924		941
925	INLINE void	942	INLINE void
…		…
1012	SAVETMPS;	1029	SAVETMPS;
1013	EXTEND (SP, 3);	1030	EXTEND (SP, 3);
1014	PUSHMARK (SP);	1031	PUSHMARK (SP);
1015	PUSHs (&PL_sv_yes);	1032	PUSHs (&PL_sv_yes);
1016	PUSHs (fullname);	1033	PUSHs (fullname);
1017	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);	1034	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1018	PUTBACK;	1035	PUTBACK;
1019	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);	1036	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1020	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);	1037	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1021	SPAGAIN;	1038	SPAGAIN;
1022	FREETMPS;	1039	FREETMPS;
…		…
1054		1071
1055	TAINT_NOT;	1072	TAINT_NOT;
1056	return 0;	1073	return 0;
1057	}	1074	}
1058		1075
		1076	static struct coro_cctx *cctx_ssl_cctx;
		1077	static struct CoroSLF cctx_ssl_frame;
		1078
1059	static void	1079	static void
1060	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)	1080	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1061	{	1081	{
1062	ta->prev = (struct coro *)cctx;	1082	ta->prev = (struct coro *)cctx_ssl_cctx;
1063	ta->next = 0;	1083	ta->next = 0;
1064	}	1084	}
1065		1085
1066	/* inject a fake call to Coro::State::_cctx_init into the execution */	1086	static int
1067	/* _cctx_init should be careful, as it could be called at almost any time */	1087	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1068	/* during execution of a perl program */	1088	{
1069	/* also initialises PL_top_env */	1089	*frame = cctx_ssl_frame;
		1090
		1091	return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
		1092	}
		1093
		1094	/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1070	static void NOINLINE	1095	static void NOINLINE
1071	cctx_prepare (pTHX_ coro_cctx *cctx)	1096	cctx_prepare (pTHX_ coro_cctx *cctx)
1072	{	1097	{
1073	dSP;
1074	UNOP myop;
1075
1076	PL_top_env = &PL_start_env;	1098	PL_top_env = &PL_start_env;
1077		1099
1078	if (cctx->flags & CC_TRACE)	1100	if (cctx->flags & CC_TRACE)
1079	PL_runops = runops_trace;	1101	PL_runops = runops_trace;
1080		1102
1081	Zero (&myop, 1, UNOP);	1103	/* we already must be executing an SLF op, there is no other valid way
1082	myop.op_next = PL_op;	1104	* that can lead to creation of a new cctx */
1083	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1105	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1106	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1084		1107
1085	PUSHMARK (SP);	1108	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1086	EXTEND (SP, 2);	1109	cctx_ssl_cctx = cctx;
1087	PUSHs (sv_2mortal (newSViv ((IV)cctx)));	1110	cctx_ssl_frame = slf_frame;
1088	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1111
1089	PUTBACK;	1112	slf_frame.prepare = slf_prepare_set_stacklevel;
1090	PL_op = (OP *)&myop;	1113	slf_frame.check = slf_check_set_stacklevel;
1091	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1092	SPAGAIN;
1093	}	1114	}
1094		1115
1095	/* the tail of transfer: execute stuff we can only do after a transfer */	1116	/* the tail of transfer: execute stuff we can only do after a transfer */
1096	INLINE void	1117	INLINE void
1097	transfer_tail (pTHX)	1118	transfer_tail (pTHX)
…		…
1124	transfer_tail (aTHX);	1145	transfer_tail (aTHX);
1125		1146
1126	/* somebody or something will hit me for both perl_run and PL_restartop */	1147	/* somebody or something will hit me for both perl_run and PL_restartop */
1127	PL_restartop = PL_op;	1148	PL_restartop = PL_op;
1128	perl_run (PL_curinterp);	1149	perl_run (PL_curinterp);
		1150	/*
		1151	* Unfortunately, there is no way to get at the return values of the
		1152	* coro body here, as perl_run destroys these
		1153	*/
1129		1154
1130	/*	1155	/*
1131	* If perl-run returns we assume exit() was being called or the coro	1156	* If perl-run returns we assume exit() was being called or the coro
1132	* fell off the end, which seems to be the only valid (non-bug)	1157	* fell off the end, which seems to be the only valid (non-bug)
1133	* reason for perl_run to return. We try to exit by jumping to the	1158	* reason for perl_run to return. We try to exit by jumping to the
…		…
1313	dSTACKLEVEL;	1338	dSTACKLEVEL;
1314		1339
1315	/* sometimes transfer is only called to set idle_sp */	1340	/* sometimes transfer is only called to set idle_sp */
1316	if (expect_false (!next))	1341	if (expect_false (!next))
1317	{	1342	{
1318	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;	1343	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1319	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1344	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1320	}	1345	}
1321	else if (expect_true (prev != next))	1346	else if (expect_true (prev != next))
1322	{	1347	{
1323	coro_cctx *prev__cctx;	1348	coro_cctx *prev__cctx;
…		…
1348		1373
1349	prev__cctx = prev->cctx;	1374	prev__cctx = prev->cctx;
1350		1375
1351	/* possibly untie and reuse the cctx */	1376	/* possibly untie and reuse the cctx */
1352	if (expect_true (	1377	if (expect_true (
1353	prev__cctx->idle_sp == (void *)stacklevel	1378	prev__cctx->idle_sp == STACKLEVEL
1354	&& !(prev__cctx->flags & CC_TRACE)	1379	&& !(prev__cctx->flags & CC_TRACE)
1355	&& !force_cctx	1380	&& !force_cctx
1356	))	1381	))
1357	{	1382	{
1358	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */	1383	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
…		…
1425		1450
1426	coro->slot = 0;	1451	coro->slot = 0;
1427	}	1452	}
1428		1453
1429	cctx_destroy (coro->cctx);	1454	cctx_destroy (coro->cctx);
		1455	SvREFCNT_dec (coro->startcv);
1430	SvREFCNT_dec (coro->args);	1456	SvREFCNT_dec (coro->args);
		1457	SvREFCNT_dec (CORO_THROW);
1431		1458
1432	if (coro->next) coro->next->prev = coro->prev;	1459	if (coro->next) coro->next->prev = coro->prev;
1433	if (coro->prev) coro->prev->next = coro->next;	1460	if (coro->prev) coro->prev->next = coro->next;
1434	if (coro == coro_first) coro_first = coro->next;	1461	if (coro == coro_first) coro_first = coro->next;
1435		1462
…		…
1489		1516
1490	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1517	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1491	TRANSFER (ta, 1);	1518	TRANSFER (ta, 1);
1492	}	1519	}
1493		1520
		1521	/*****************************************************************************/
		1522	/* gensub: simple closure generation utility */
		1523
		1524	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		1525
		1526	/* create a closure from XS, returns a code reference */
		1527	/* the arg can be accessed via GENSUB_ARG from the callback */
		1528	/* the callback must use dXSARGS/XSRETURN */
		1529	static SV *
		1530	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		1531	{
		1532	CV *cv = (CV *)newSV (0);
		1533
		1534	sv_upgrade ((SV *)cv, SVt_PVCV);
		1535
		1536	CvANON_on (cv);
		1537	CvISXSUB_on (cv);
		1538	CvXSUB (cv) = xsub;
		1539	GENSUB_ARG = arg;
		1540
		1541	return newRV_noinc ((SV *)cv);
		1542	}
		1543
1494	/** Coro ********************************************************************/	1544	/** Coro ********************************************************************/
1495		1545
1496	INLINE void	1546	INLINE void
1497	coro_enq (pTHX_ struct coro *coro)	1547	coro_enq (pTHX_ struct coro *coro)
1498	{	1548	{
…		…
1541	ENTER;	1591	ENTER;
1542	SAVETMPS;	1592	SAVETMPS;
1543		1593
1544	PUSHMARK (SP);	1594	PUSHMARK (SP);
1545	PUTBACK;	1595	PUTBACK;
1546	call_sv (sv_hook, G_DISCARD);	1596	call_sv (sv_hook, G_VOID | G_DISCARD);
1547	SPAGAIN;
1548		1597
1549	FREETMPS;	1598	FREETMPS;
1550	LEAVE;	1599	LEAVE;
1551	}	1600	}
1552		1601
…		…
1579	ENTER;	1628	ENTER;
1580	SAVETMPS;	1629	SAVETMPS;
1581		1630
1582	PUSHMARK (SP);	1631	PUSHMARK (SP);
1583	PUTBACK;	1632	PUTBACK;
1584	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1633	call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1585	SPAGAIN;
1586		1634
1587	FREETMPS;	1635	FREETMPS;
1588	LEAVE;	1636	LEAVE;
1589	continue;	1637	continue;
1590	}	1638	}
…		…
1697	if (coro->flags & CF_RUNNING)	1745	if (coro->flags & CF_RUNNING)
1698	PL_runops = RUNOPS_DEFAULT;	1746	PL_runops = RUNOPS_DEFAULT;
1699	else	1747	else
1700	coro->slot->runops = RUNOPS_DEFAULT;	1748	coro->slot->runops = RUNOPS_DEFAULT;
1701	}	1749	}
		1750	}
		1751
		1752	/*****************************************************************************/
		1753	/* async pool handler */
		1754
		1755	static int
		1756	slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
		1757	{
		1758	HV *hv = (HV *)SvRV (coro_current);
		1759	struct coro *coro = (struct coro *)frame->data;
		1760
		1761	if (!coro->invoke_cb)
		1762	return 1; /* loop till we have invoke */
		1763	else
		1764	{
		1765	hv_store (hv, "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1767
		1768	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
		1769
		1770	{
		1771	dSP;
		1772	XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
		1773	PUTBACK;
		1774	}
		1775
		1776	SvREFCNT_dec (GvAV (PL_defgv));
		1777	GvAV (PL_defgv) = coro->invoke_av;
		1778	coro->invoke_av = 0;
		1779
		1780	return 0;
		1781	}
		1782	}
		1783
		1784	static void
		1785	slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1786	{
		1787	HV *hv = (HV *)SvRV (coro_current);
		1788	struct coro *coro = SvSTATE_hv ((SV *)hv);
		1789
		1790	if (expect_true (coro->saved_deffh))
		1791	{
		1792	/* subsequent iteration */
		1793	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1794	coro->saved_deffh = 0;
		1795
		1796	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
		1797	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1798	{
		1799	coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
		1800	coro->invoke_av = newAV ();
		1801
		1802	frame->prepare = prepare_nop;
		1803	}
		1804	else
		1805	{
		1806	av_clear (GvAV (PL_defgv));
		1807	hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
		1808
		1809	coro->prio = 0;
		1810
		1811	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1812	api_trace (aTHX_ coro_current, 0);
		1813
		1814	frame->prepare = prepare_schedule;
		1815	av_push (av_async_pool, SvREFCNT_inc (hv));
		1816	}
		1817	}
		1818	else
		1819	{
		1820	/* first iteration, simply fall through */
		1821	frame->prepare = prepare_nop;
		1822	}
		1823
		1824	frame->check = slf_check_pool_handler;
		1825	frame->data = (void *)coro;
		1826	}
		1827
		1828	/*****************************************************************************/
		1829	/* rouse callback */
		1830
		1831	#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
		1832
		1833	static void
		1834	coro_rouse_callback (pTHX_ CV *cv)
		1835	{
		1836	dXSARGS;
		1837	SV *data = (SV *)GENSUB_ARG;
		1838
		1839	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1840	{
		1841	/* first call, set args */
		1842	AV *av = newAV ();
		1843	SV *coro = SvRV (data);
		1844
		1845	SvRV_set (data, (SV *)av);
		1846	api_ready (aTHX_ coro);
		1847	SvREFCNT_dec (coro);
		1848
		1849	/* better take a full copy of the arguments */
		1850	while (items--)
		1851	av_store (av, items, newSVsv (ST (items)));
		1852	}
		1853
		1854	XSRETURN_EMPTY;
		1855	}
		1856
		1857	static int
		1858	slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
		1859	{
		1860	SV *data = (SV *)frame->data;
		1861
		1862	if (CORO_THROW)
		1863	return 0;
		1864
		1865	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1866	return 1;
		1867
		1868	/* now push all results on the stack */
		1869	{
		1870	dSP;
		1871	AV *av = (AV *)SvRV (data);
		1872	int i;
		1873
		1874	EXTEND (SP, AvFILLp (av) + 1);
		1875	for (i = 0; i <= AvFILLp (av); ++i)
		1876	PUSHs (sv_2mortal (AvARRAY (av)[i]));
		1877
		1878	/* we have stolen the elements, so ste length to zero and free */
		1879	AvFILLp (av) = -1;
		1880	av_undef (av);
		1881
		1882	PUTBACK;
		1883	}
		1884
		1885	return 0;
		1886	}
		1887
		1888	static void
		1889	slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1890	{
		1891	SV *cb;
		1892
		1893	if (items)
		1894	cb = arg [0];
		1895	else
		1896	{
		1897	struct coro *coro = SvSTATE_current;
		1898
		1899	if (!coro->rouse_cb)
		1900	croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
		1901
		1902	cb = sv_2mortal (coro->rouse_cb);
		1903	coro->rouse_cb = 0;
		1904	}
		1905
		1906	if (!SvROK (cb)
		1907	|| SvTYPE (SvRV (cb)) != SVt_PVCV
		1908	|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
		1909	croak ("Coro::rouse_wait called with illegal callback argument,");
		1910
		1911	{
		1912	CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
		1913	SV *data = (SV *)GENSUB_ARG;
		1914
		1915	frame->data = (void *)data;
		1916	frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
		1917	frame->check = slf_check_rouse_wait;
		1918	}
		1919	}
		1920
		1921	static SV *
		1922	coro_new_rouse_cb (pTHX)
		1923	{
		1924	HV *hv = (HV *)SvRV (coro_current);
		1925	struct coro *coro = SvSTATE_hv (hv);
		1926	SV *data = newRV_inc ((SV *)hv);
		1927	SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
		1928
		1929	sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
		1930	SvREFCNT_dec (data); /* magicext increases the refcount */
		1931
		1932	SvREFCNT_dec (coro->rouse_cb);
		1933	coro->rouse_cb = SvREFCNT_inc_NN (cb);
		1934
		1935	return cb;
		1936	}
		1937
		1938	/*****************************************************************************/
		1939	/* schedule-like-function opcode (SLF) */
		1940
		1941	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1942	static const CV *slf_cv;
		1943	static SV **slf_argv;
		1944	static int slf_argc, slf_arga; /* count, allocated */
		1945	static I32 slf_ax; /* top of stack, for restore */
		1946
		1947	/* this restores the stack in the case we patched the entersub, to */
		1948	/* recreate the stack frame as perl will on following calls */
		1949	/* since entersub cleared the stack */
		1950	static OP *
		1951	pp_restore (pTHX)
		1952	{
		1953	int i;
		1954	SV **SP = PL_stack_base + slf_ax;
		1955
		1956	PUSHMARK (SP);
		1957
		1958	EXTEND (SP, slf_argc + 1);
		1959
		1960	for (i = 0; i < slf_argc; ++i)
		1961	PUSHs (sv_2mortal (slf_argv [i]));
		1962
		1963	PUSHs ((SV *)CvGV (slf_cv));
		1964
		1965	RETURNOP (slf_restore.op_first);
		1966	}
		1967
		1968	static void
		1969	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1970	{
		1971	SV **arg = (SV **)slf_frame.data;
		1972
		1973	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1974	}
		1975
		1976	static void
		1977	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1978	{
		1979	if (items != 2)
		1980	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1981
		1982	frame->prepare = slf_prepare_transfer;
		1983	frame->check = slf_check_nop;
		1984	frame->data = (void *)arg; /* let's hope it will stay valid */
		1985	}
		1986
		1987	static void
		1988	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1989	{
		1990	frame->prepare = prepare_schedule;
		1991	frame->check = slf_check_nop;
		1992	}
		1993
		1994	static void
		1995	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1996	{
		1997	frame->prepare = prepare_cede;
		1998	frame->check = slf_check_nop;
		1999	}
		2000
		2001	static void
		2002	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2003	{
		2004	frame->prepare = prepare_cede_notself;
		2005	frame->check = slf_check_nop;
		2006	}
		2007
		2008	/*
		2009	* these not obviously related functions are all rolled into one
		2010	* function to increase chances that they all will call transfer with the same
		2011	* stack offset
		2012	* SLF stands for "schedule-like-function".
		2013	*/
		2014	static OP *
		2015	pp_slf (pTHX)
		2016	{
		2017	I32 checkmark; /* mark SP to see how many elements check has pushed */
		2018
		2019	/* set up the slf frame, unless it has already been set-up */
		2020	/* the latter happens when a new coro has been started */
		2021	/* or when a new cctx was attached to an existing coroutine */
		2022	if (expect_true (!slf_frame.prepare))
		2023	{
		2024	/* first iteration */
		2025	dSP;
		2026	SV **arg = PL_stack_base + TOPMARK + 1;
		2027	int items = SP - arg; /* args without function object */
		2028	SV *gv = *sp;
		2029
		2030	/* do a quick consistency check on the "function" object, and if it isn't */
		2031	/* for us, divert to the real entersub */
		2032	if (SvTYPE (gv) != SVt_PVGV
		2033	|| !GvCV (gv)
		2034	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		2035	return PL_ppaddr[OP_ENTERSUB](aTHX);
		2036
		2037	if (!(PL_op->op_flags & OPf_STACKED))
		2038	{
		2039	/* ampersand-form of call, use @_ instead of stack */
		2040	AV *av = GvAV (PL_defgv);
		2041	arg = AvARRAY (av);
		2042	items = AvFILLp (av) + 1;
		2043	}
		2044
		2045	/* now call the init function, which needs to set up slf_frame */
		2046	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		2047	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		2048
		2049	/* pop args */
		2050	SP = PL_stack_base + POPMARK;
		2051
		2052	PUTBACK;
		2053	}
		2054
		2055	/* now that we have a slf_frame, interpret it! */
		2056	/* we use a callback system not to make the code needlessly */
		2057	/* complicated, but so we can run multiple perl coros from one cctx */
		2058
		2059	do
		2060	{
		2061	struct coro_transfer_args ta;
		2062
		2063	slf_frame.prepare (aTHX_ &ta);
		2064	TRANSFER (ta, 0);
		2065
		2066	checkmark = PL_stack_sp - PL_stack_base;
		2067	}
		2068	while (slf_frame.check (aTHX_ &slf_frame));
		2069
		2070	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		2071
		2072	/* exception handling */
		2073	if (expect_false (CORO_THROW))
		2074	{
		2075	SV *exception = sv_2mortal (CORO_THROW);
		2076
		2077	CORO_THROW = 0;
		2078	sv_setsv (ERRSV, exception);
		2079	croak (0);
		2080	}
		2081
		2082	/* return value handling - mostly like entersub */
		2083	/* make sure we put something on the stack in scalar context */
		2084	if (GIMME_V == G_SCALAR)
		2085	{
		2086	dSP;
		2087	SV **bot = PL_stack_base + checkmark;
		2088
		2089	if (sp == bot) /* too few, push undef */
		2090	bot [1] = &PL_sv_undef;
		2091	else if (sp != bot + 1) /* too many, take last one */
		2092	bot [1] = *sp;
		2093
		2094	SP = bot + 1;
		2095
		2096	PUTBACK;
		2097	}
		2098
		2099	return NORMAL;
		2100	}
		2101
		2102	static void
		2103	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		2104	{
		2105	int i;
		2106	SV **arg = PL_stack_base + ax;
		2107	int items = PL_stack_sp - arg + 1;
		2108
		2109	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		2110
		2111	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		2112	&& PL_op->op_ppaddr != pp_slf)
		2113	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		2114
		2115	CvFLAGS (cv) |= CVf_SLF;
		2116	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		2117	slf_cv = cv;
		2118
		2119	/* we patch the op, and then re-run the whole call */
		2120	/* we have to put the same argument on the stack for this to work */
		2121	/* and this will be done by pp_restore */
		2122	slf_restore.op_next = (OP *)&slf_restore;
		2123	slf_restore.op_type = OP_CUSTOM;
		2124	slf_restore.op_ppaddr = pp_restore;
		2125	slf_restore.op_first = PL_op;
		2126
		2127	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		2128
		2129	if (PL_op->op_flags & OPf_STACKED)
		2130	{
		2131	if (items > slf_arga)
		2132	{
		2133	slf_arga = items;
		2134	free (slf_argv);
		2135	slf_argv = malloc (slf_arga * sizeof (SV *));
		2136	}
		2137
		2138	slf_argc = items;
		2139
		2140	for (i = 0; i < items; ++i)
		2141	slf_argv [i] = SvREFCNT_inc (arg [i]);
		2142	}
		2143	else
		2144	slf_argc = 0;
		2145
		2146	PL_op->op_ppaddr = pp_slf;
		2147	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		2148
		2149	PL_op = (OP *)&slf_restore;
1702	}	2150	}
1703		2151
1704	/*****************************************************************************/	2152	/*****************************************************************************/
1705	/* PerlIO::cede */	2153	/* PerlIO::cede */
1706		2154
…		…
1775	PerlIOBuf_get_cnt,	2223	PerlIOBuf_get_cnt,
1776	PerlIOBuf_set_ptrcnt,	2224	PerlIOBuf_set_ptrcnt,
1777	};	2225	};
1778		2226
1779	/*****************************************************************************/	2227	/*****************************************************************************/
		2228	/* Coro::Semaphore & Coro::Signal */
1780		2229
1781	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1782	static const CV *slf_cv;
1783	static SV **slf_argv;
1784	static int slf_argc, slf_arga; /* count, allocated */
1785	static I32 slf_ax; /* top of stack, for restore */
1786
1787	/* this restores the stack in the case we patched the entersub, to */
1788	/* recreate the stack frame as perl will on following calls */
1789	/* since entersub cleared the stack */
1790	static OP *	2230	static SV *
1791	pp_restore (pTHX)	2231	coro_waitarray_new (pTHX_ int count)
1792	{	2232	{
1793	int i;	2233	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1794	SV **SP = PL_stack_base + slf_ax;	2234	AV *av = newAV ();
		2235	SV **ary;
1795		2236
1796	PUSHMARK (SP);	2237	/* unfortunately, building manually saves memory */
		2238	Newx (ary, 2, SV *);
		2239	AvALLOC (av) = ary;
		2240	/*AvARRAY (av) = ary;*/
		2241	SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
		2242	AvMAX (av) = 1;
		2243	AvFILLp (av) = 0;
		2244	ary [0] = newSViv (count);
1797		2245
1798	EXTEND (SP, slf_argc + 1);	2246	return newRV_noinc ((SV *)av);
1799
1800	for (i = 0; i < slf_argc; ++i)
1801	PUSHs (sv_2mortal (slf_argv [i]));
1802
1803	PUSHs ((SV *)CvGV (slf_cv));
1804
1805	RETURNOP (slf_restore.op_first);
1806	}	2247	}
1807		2248
1808	static void	2249	/* semaphore */
1809	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1810	{
1811	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1812	}
1813
1814	static void
1815	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1816	{
1817	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1818
1819	frame->prepare = slf_prepare_set_stacklevel;
1820	frame->check = slf_check_nop;
1821	frame->data = (void *)SvIV (arg [0]);
1822	}
1823
1824	static void
1825	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1826	{
1827	SV **arg = (SV **)slf_frame.data;
1828
1829	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1830	}
1831
1832	static void
1833	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834	{
1835	if (items != 2)
1836	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838	frame->prepare = slf_prepare_transfer;
1839	frame->check = slf_check_nop;
1840	frame->data = (void *)arg; /* let's hope it will stay valid */
1841	}
1842
1843	static void
1844	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845	{
1846	frame->prepare = prepare_schedule;
1847	frame->check = slf_check_nop;
1848	}
1849
1850	static void
1851	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852	{
1853	frame->prepare = prepare_cede;
1854	frame->check = slf_check_nop;
1855	}
1856
1857	static void
1858	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859	{
1860	frame->prepare = prepare_cede_notself;
1861	frame->check = slf_check_nop;
1862	}
1863
1864	/* we hijack an hopefully unused CV flag for our purposes */
1865	#define CVf_SLF 0x4000
1866
1867	/*
1868	* these not obviously related functions are all rolled into one
1869	* function to increase chances that they all will call transfer with the same
1870	* stack offset
1871	* SLF stands for "schedule-like-function".
1872	*/
1873	static OP *
1874	pp_slf (pTHX)
1875	{
1876	I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878	/* set up the slf frame, unless it has already been set-up */
1879	/* the latter happens when a new coro has been started */
1880	/* or when a new cctx was attached to an existing coroutine */
1881	if (expect_true (!slf_frame.prepare))
1882	{
1883	/* first iteration */
1884	dSP;
1885	SV **arg = PL_stack_base + TOPMARK + 1;
1886	int items = SP - arg; /* args without function object */
1887	SV *gv = *sp;
1888
1889	/* do a quick consistency check on the "function" object, and if it isn't */
1890	/* for us, divert to the real entersub */
1891	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892	return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894	if (!(PL_op->op_flags & OPf_STACKED))
1895	{
1896	/* ampersand-form of call, use @_ instead of stack */
1897	AV *av = GvAV (PL_defgv);
1898	arg = AvARRAY (av);
1899	items = AvFILLp (av) + 1;
1900	}
1901
1902	/* now call the init function, which needs to set up slf_frame */
1903	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904	(aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906	/* pop args */
1907	SP = PL_stack_base + POPMARK;
1908
1909	PUTBACK;
1910	}
1911
1912	/* now that we have a slf_frame, interpret it! */
1913	/* we use a callback system not to make the code needlessly */
1914	/* complicated, but so we can run multiple perl coros from one cctx */
1915
1916	do
1917	{
1918	struct coro_transfer_args ta;
1919
1920	slf_frame.prepare (aTHX_ &ta);
1921	TRANSFER (ta, 0);
1922
1923	checkmark = PL_stack_sp - PL_stack_base;
1924	}
1925	while (slf_frame.check (aTHX_ &slf_frame));
1926
1927	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1928
1929	/* return value handling - mostly like entersub */
1930	{
1931	dSP;
1932	SV **bot = PL_stack_base + checkmark;
1933	int gimme = GIMME_V;
1934
1935	/* make sure we put something on the stack in scalar context */
1936	if (gimme == G_SCALAR)
1937	{
1938	if (sp == bot)
1939	XPUSHs (&PL_sv_undef);
1940
1941	SP = bot + 1;
1942	}
1943
1944	PUTBACK;
1945	}
1946
1947	/* exception handling */
1948	if (expect_false (coro_throw))
1949	{
1950	SV *exception = sv_2mortal (coro_throw);
1951
1952	coro_throw = 0;
1953	sv_setsv (ERRSV, exception);
1954	croak (0);
1955	}
1956
1957	return NORMAL;
1958	}
1959
1960	static void
1961	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1962	{
1963	int i;
1964	SV **arg = PL_stack_base + ax;
1965	int items = PL_stack_sp - arg + 1;
1966
1967	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1968
1969	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1970	&& PL_op->op_ppaddr != pp_slf)
1971	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1972
1973	CvFLAGS (cv) |= CVf_SLF;
1974	CvXSUBANY (cv).any_ptr = (void *)init_cb;
1975	slf_cv = cv;
1976
1977	/* we patch the op, and then re-run the whole call */
1978	/* we have to put the same argument on the stack for this to work */
1979	/* and this will be done by pp_restore */
1980	slf_restore.op_next = (OP *)&slf_restore;
1981	slf_restore.op_type = OP_CUSTOM;
1982	slf_restore.op_ppaddr = pp_restore;
1983	slf_restore.op_first = PL_op;
1984
1985	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1986
1987	if (items > slf_arga)
1988	{
1989	slf_arga = items;
1990	free (slf_argv);
1991	slf_argv = malloc (slf_arga * sizeof (SV *));
1992	}
1993
1994	slf_argc = items;
1995
1996	for (i = 0; i < items; ++i)
1997	slf_argv [i] = SvREFCNT_inc (arg [i]);
1998
1999	PL_op->op_ppaddr = pp_slf;
2000	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2001
2002	PL_op = (OP *)&slf_restore;
2003	}
2004
2005	/*****************************************************************************/
2006		2250
2007	static void	2251	static void
2008	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)	2252	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2009	{	2253	{
2010	SV *count_sv = AvARRAY (av)[0];	2254	SV *count_sv = AvARRAY (av)[0];
…		…
2022	AvARRAY (av)[0] = AvARRAY (av)[1];	2266	AvARRAY (av)[0] = AvARRAY (av)[1];
2023	AvARRAY (av)[1] = count_sv;	2267	AvARRAY (av)[1] = count_sv;
2024	cb = av_shift (av);	2268	cb = av_shift (av);
2025		2269
2026	if (SvOBJECT (cb))	2270	if (SvOBJECT (cb))
		2271	{
2027	api_ready (aTHX_ cb);	2272	api_ready (aTHX_ cb);
2028	else	2273	--count;
2029	croak ("callbacks not yet supported");	2274	}
		2275	else if (SvTYPE (cb) == SVt_PVCV)
		2276	{
		2277	dSP;
		2278	PUSHMARK (SP);
		2279	XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
		2280	PUTBACK;
		2281	call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
		2282	}
2030		2283
2031	SvREFCNT_dec (cb);	2284	SvREFCNT_dec (cb);
2032
2033	--count;
2034	}	2285	}
2035	}	2286	}
2036		2287
2037	static void	2288	static void
2038	coro_semaphore_on_destroy (pTHX_ struct coro *coro)	2289	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
…		…
2040	/* call $sem->adjust (0) to possibly wake up some other waiters */	2291	/* call $sem->adjust (0) to possibly wake up some other waiters */
2041	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);	2292	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2042	}	2293	}
2043		2294
2044	static int	2295	static int
2045	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)	2296	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2046	{	2297	{
2047	AV *av = (AV *)frame->data;	2298	AV *av = (AV *)frame->data;
2048	SV *count_sv = AvARRAY (av)[0];	2299	SV *count_sv = AvARRAY (av)[0];
2049		2300
		2301	/* if we are about to throw, don't actually acquire the lock, just throw */
		2302	if (CORO_THROW)
		2303	return 0;
2050	if (SvIVX (count_sv) > 0)	2304	else if (SvIVX (count_sv) > 0)
2051	{	2305	{
2052	SvSTATE_current->on_destroy = 0;	2306	SvSTATE_current->on_destroy = 0;
		2307
		2308	if (acquire)
2053	SvIVX (count_sv) = SvIVX (count_sv) - 1;	2309	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2310	else
		2311	coro_semaphore_adjust (aTHX_ av, 0);
		2312
2054	return 0;	2313	return 0;
2055	}	2314	}
2056	else	2315	else
2057	{	2316	{
2058	int i;	2317	int i;
…		…
2067	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2326	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2068	return 1;	2327	return 1;
2069	}	2328	}
2070	}	2329	}
2071		2330
2072	static void	2331	static int
		2332	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2333	{
		2334	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2335	}
		2336
		2337	static int
		2338	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2339	{
		2340	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2341	}
		2342
		2343	static void
2073	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)	2344	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2074	{	2345	{
2075	AV *av = (AV *)SvRV (arg [0]);	2346	AV *av = (AV *)SvRV (arg [0]);
2076		2347
2077	if (SvIVX (AvARRAY (av)[0]) > 0)	2348	if (SvIVX (AvARRAY (av)[0]) > 0)
2078	{	2349	{
2079	frame->data = (void *)av;	2350	frame->data = (void *)av;
2080	frame->prepare = prepare_nop;	2351	frame->prepare = prepare_nop;
2081	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2082	}	2352	}
2083	else	2353	else
2084	{	2354	{
2085	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2355	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2086		2356
2087	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));	2357	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2088	frame->prepare = prepare_schedule;	2358	frame->prepare = prepare_schedule;
2089		2359
2090	/* to avoid race conditions when a woken-up coro gets terminated */	2360	/* to avoid race conditions when a woken-up coro gets terminated */
2091	/* we arrange for a temporary on_destroy that calls adjust (0) */	2361	/* we arrange for a temporary on_destroy that calls adjust (0) */
2092	assert (!SvSTATE_current->on_destroy);//D
2093	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;	2362	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2094	}	2363	}
		2364	}
2095		2365
		2366	static void
		2367	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2368	{
		2369	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2096	frame->check = slf_check_semaphore_down;	2370	frame->check = slf_check_semaphore_down;
		2371	}
2097		2372
		2373	static void
		2374	slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2375	{
		2376	if (items >= 2)
		2377	{
		2378	/* callback form */
		2379	AV *av = (AV *)SvRV (arg [0]);
		2380	CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
		2381
		2382	av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
		2383
		2384	if (SvIVX (AvARRAY (av)[0]) > 0)
		2385	coro_semaphore_adjust (aTHX_ av, 0);
		2386
		2387	frame->prepare = prepare_nop;
		2388	frame->check = slf_check_nop;
		2389	}
		2390	else
		2391	{
		2392	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2393	frame->check = slf_check_semaphore_wait;
		2394	}
		2395	}
		2396
		2397	/* signal */
		2398
		2399	static void
		2400	coro_signal_wake (pTHX_ AV *av, int count)
		2401	{
		2402	SvIVX (AvARRAY (av)[0]) = 0;
		2403
		2404	/* now signal count waiters */
		2405	while (count > 0 && AvFILLp (av) > 0)
		2406	{
		2407	SV *cb;
		2408
		2409	/* swap first two elements so we can shift a waiter */
		2410	cb = AvARRAY (av)[0];
		2411	AvARRAY (av)[0] = AvARRAY (av)[1];
		2412	AvARRAY (av)[1] = cb;
		2413
		2414	cb = av_shift (av);
		2415
		2416	api_ready (aTHX_ cb);
		2417	sv_setiv (cb, 0); /* signal waiter */
		2418	SvREFCNT_dec (cb);
		2419
		2420	--count;
		2421	}
		2422	}
		2423
		2424	static int
		2425	slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
		2426	{
		2427	/* if we are about to throw, also stop waiting */
		2428	return SvROK ((SV *)frame->data) && !CORO_THROW;
		2429	}
		2430
		2431	static void
		2432	slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2433	{
		2434	AV *av = (AV *)SvRV (arg [0]);
		2435
		2436	if (SvIVX (AvARRAY (av)[0]))
		2437	{
		2438	SvIVX (AvARRAY (av)[0]) = 0;
		2439	frame->prepare = prepare_nop;
		2440	frame->check = slf_check_nop;
		2441	}
		2442	else
		2443	{
		2444	SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
		2445
		2446	av_push (av, waiter);
		2447
		2448	frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
		2449	frame->prepare = prepare_schedule;
		2450	frame->check = slf_check_signal_wait;
		2451	}
2098	}	2452	}
2099		2453
2100	/*****************************************************************************/	2454	/*****************************************************************************/
		2455	/* Coro::AIO */
2101		2456
2102	#define GENSUB_ARG CvXSUBANY (cv).any_ptr	2457	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2103		2458
2104	/* create a closure from XS, returns a code reference */	2459	/* helper storage struct */
2105	/* the arg can be accessed via GENSUB_ARG from the callback */	2460	struct io_state
2106	/* the callback must use dXSARGS/XSRETURN */
2107	static SV *
2108	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2109	{	2461	{
2110	CV *cv = (CV *)NEWSV (0, 0);	2462	int errorno;
		2463	I32 laststype; /* U16 in 5.10.0 */
		2464	int laststatval;
		2465	Stat_t statcache;
		2466	};
2111		2467
		2468	static void
		2469	coro_aio_callback (pTHX_ CV *cv)
		2470	{
		2471	dXSARGS;
		2472	AV *state = (AV *)GENSUB_ARG;
		2473	SV *coro = av_pop (state);
		2474	SV *data_sv = newSV (sizeof (struct io_state));
		2475
		2476	av_extend (state, items - 1);
		2477
2112	sv_upgrade ((SV *)cv, SVt_PVCV);	2478	sv_upgrade (data_sv, SVt_PV);
		2479	SvCUR_set (data_sv, sizeof (struct io_state));
		2480	SvPOK_only (data_sv);
2113		2481
2114	CvANON_on (cv);	2482	{
2115	CvISXSUB_on (cv);	2483	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2116	CvXSUB (cv) = xsub;
2117	GENSUB_ARG = arg;
2118		2484
2119	return newRV_noinc ((SV *)cv);	2485	data->errorno = errno;
		2486	data->laststype = PL_laststype;
		2487	data->laststatval = PL_laststatval;
		2488	data->statcache = PL_statcache;
		2489	}
		2490
		2491	/* now build the result vector out of all the parameters and the data_sv */
		2492	{
		2493	int i;
		2494
		2495	for (i = 0; i < items; ++i)
		2496	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2497	}
		2498
		2499	av_push (state, data_sv);
		2500
		2501	api_ready (aTHX_ coro);
		2502	SvREFCNT_dec (coro);
		2503	SvREFCNT_dec ((AV *)state);
		2504	}
		2505
		2506	static int
		2507	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2508	{
		2509	AV *state = (AV *)frame->data;
		2510
		2511	/* if we are about to throw, return early */
		2512	/* this does not cancel the aio request, but at least */
		2513	/* it quickly returns */
		2514	if (CORO_THROW)
		2515	return 0;
		2516
		2517	/* one element that is an RV? repeat! */
		2518	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2519	return 1;
		2520
		2521	/* restore status */
		2522	{
		2523	SV *data_sv = av_pop (state);
		2524	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2525
		2526	errno = data->errorno;
		2527	PL_laststype = data->laststype;
		2528	PL_laststatval = data->laststatval;
		2529	PL_statcache = data->statcache;
		2530
		2531	SvREFCNT_dec (data_sv);
		2532	}
		2533
		2534	/* push result values */
		2535	{
		2536	dSP;
		2537	int i;
		2538
		2539	EXTEND (SP, AvFILLp (state) + 1);
		2540	for (i = 0; i <= AvFILLp (state); ++i)
		2541	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2542
		2543	PUTBACK;
		2544	}
		2545
		2546	return 0;
		2547	}
		2548
		2549	static void
		2550	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2551	{
		2552	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2553	SV *coro_hv = SvRV (coro_current);
		2554	struct coro *coro = SvSTATE_hv (coro_hv);
		2555
		2556	/* put our coroutine id on the state arg */
		2557	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2558
		2559	/* first see whether we have a non-zero priority and set it as AIO prio */
		2560	if (coro->prio)
		2561	{
		2562	dSP;
		2563
		2564	static SV *prio_cv;
		2565	static SV *prio_sv;
		2566
		2567	if (expect_false (!prio_cv))
		2568	{
		2569	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2570	prio_sv = newSViv (0);
		2571	}
		2572
		2573	PUSHMARK (SP);
		2574	sv_setiv (prio_sv, coro->prio);
		2575	XPUSHs (prio_sv);
		2576
		2577	PUTBACK;
		2578	call_sv (prio_cv, G_VOID | G_DISCARD);
		2579	}
		2580
		2581	/* now call the original request */
		2582	{
		2583	dSP;
		2584	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2585	int i;
		2586
		2587	PUSHMARK (SP);
		2588
		2589	/* first push all args to the stack */
		2590	EXTEND (SP, items + 1);
		2591
		2592	for (i = 0; i < items; ++i)
		2593	PUSHs (arg [i]);
		2594
		2595	/* now push the callback closure */
		2596	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
		2597
		2598	/* now call the AIO function - we assume our request is uncancelable */
		2599	PUTBACK;
		2600	call_sv ((SV *)req, G_VOID | G_DISCARD);
		2601	}
		2602
		2603	/* now that the requets is going, we loop toll we have a result */
		2604	frame->data = (void *)state;
		2605	frame->prepare = prepare_schedule;
		2606	frame->check = slf_check_aio_req;
		2607	}
		2608
		2609	static void
		2610	coro_aio_req_xs (pTHX_ CV *cv)
		2611	{
		2612	dXSARGS;
		2613
		2614	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2615
		2616	XSRETURN_EMPTY;
2120	}	2617	}
2121		2618
2122	/*****************************************************************************/	2619	/*****************************************************************************/
2123		2620
2124	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2621	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
…		…
2194	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	2691	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2195	}	2692	}
2196		2693
2197	SV *	2694	SV *
2198	new (char *klass, ...)	2695	new (char *klass, ...)
		2696	ALIAS:
		2697	Coro::new = 1
2199	CODE:	2698	CODE:
2200	{	2699	{
2201	struct coro *coro;	2700	struct coro *coro;
2202	MAGIC *mg;	2701	MAGIC *mg;
2203	HV *hv;	2702	HV *hv;
		2703	CV *cb;
2204	int i;	2704	int i;
		2705
		2706	if (items > 1)
		2707	{
		2708	cb = coro_sv_2cv (aTHX_ ST (1));
		2709
		2710	if (!ix)
		2711	{
		2712	if (CvISXSUB (cb))
		2713	croak ("Coro::State doesn't support XS functions as coroutine start, caught");
		2714
		2715	if (!CvROOT (cb))
		2716	croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
		2717	}
		2718	}
2205		2719
2206	Newz (0, coro, 1, struct coro);	2720	Newz (0, coro, 1, struct coro);
2207	coro->args = newAV ();	2721	coro->args = newAV ();
2208	coro->flags = CF_NEW;	2722	coro->flags = CF_NEW;
2209		2723
…		…
2214	coro->hv = hv = newHV ();	2728	coro->hv = hv = newHV ();
2215	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);	2729	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2216	mg->mg_flags |= MGf_DUP;	2730	mg->mg_flags |= MGf_DUP;
2217	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	2731	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2218		2732
		2733	if (items > 1)
		2734	{
2219	av_extend (coro->args, items - 1);	2735	av_extend (coro->args, items - 1 + ix - 1);
		2736
		2737	if (ix)
		2738	{
		2739	av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
		2740	cb = cv_coro_run;
		2741	}
		2742
		2743	coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
		2744
2220	for (i = 1; i < items; i++)	2745	for (i = 2; i < items; i++)
2221	av_push (coro->args, newSVsv (ST (i)));	2746	av_push (coro->args, newSVsv (ST (i)));
		2747	}
2222	}	2748	}
2223	OUTPUT:	2749	OUTPUT:
2224	RETVAL	2750	RETVAL
2225
2226	void
2227	_set_stacklevel (...)
2228	CODE:
2229	CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
2230		2751
2231	void	2752	void
2232	transfer (...)	2753	transfer (...)
2233	PROTOTYPE: $$	2754	PROTOTYPE: $$
2234	CODE:	2755	CODE:
…		…
2360	throw (Coro::State self, SV *throw = &PL_sv_undef)	2881	throw (Coro::State self, SV *throw = &PL_sv_undef)
2361	PROTOTYPE: $;$	2882	PROTOTYPE: $;$
2362	CODE:	2883	CODE:
2363	{	2884	{
2364	struct coro *current = SvSTATE_current;	2885	struct coro *current = SvSTATE_current;
2365	SV **throwp = self == current ? &coro_throw : &self->throw;	2886	SV **throwp = self == current ? &CORO_THROW : &self->except;
2366	SvREFCNT_dec (*throwp);	2887	SvREFCNT_dec (*throwp);
2367	*throwp = SvOK (throw) ? newSVsv (throw) : 0;	2888	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
2368	}	2889	}
2369		2890
2370	void	2891	void
…		…
2422	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2943	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2423		2944
2424	SV *tmp = *src; *src = *dst; *dst = tmp;	2945	SV *tmp = *src; *src = *dst; *dst = tmp;
2425	}	2946	}
2426		2947
		2948
2427	MODULE = Coro::State PACKAGE = Coro	2949	MODULE = Coro::State PACKAGE = Coro
2428		2950
2429	BOOT:	2951	BOOT:
2430	{	2952	{
2431	int i;	2953	int i;
2432		2954
2433	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);	2955	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2434	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);	2956	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2435	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);	2957	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2436		2958	cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
		2959	cv_coro_terminate = get_cv ( "Coro::terminate", GV_ADD);
2437	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);	2960	coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2438	SvREADONLY_on (coro_current);	2961	SvREADONLY_on (coro_current);
		2962
		2963	sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
		2964	sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
		2965	cv_pool_handler = get_cv ("Coro::_pool_handler", 0); SvREADONLY_on (cv_pool_handler);
		2966	cv_coro_new = get_cv ("Coro::new", 0); SvREADONLY_on (cv_coro_new);
2439		2967
2440	coro_stash = gv_stashpv ("Coro", TRUE);	2968	coro_stash = gv_stashpv ("Coro", TRUE);
2441		2969
2442	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	2970	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2443	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	2971	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
…		…
2458	coroapi.ready = api_ready;	2986	coroapi.ready = api_ready;
2459	coroapi.is_ready = api_is_ready;	2987	coroapi.is_ready = api_is_ready;
2460	coroapi.nready = coro_nready;	2988	coroapi.nready = coro_nready;
2461	coroapi.current = coro_current;	2989	coroapi.current = coro_current;
2462		2990
2463	GCoroAPI = &coroapi;	2991	/*GCoroAPI = &coroapi;*/
2464	sv_setiv (sv, (IV)&coroapi);	2992	sv_setiv (sv, (IV)&coroapi);
2465	SvREADONLY_on (sv);	2993	SvREADONLY_on (sv);
2466	}	2994	}
2467	}	2995	}
2468		2996
…		…
2532	CODE:	3060	CODE:
2533	RETVAL = coro_nready;	3061	RETVAL = coro_nready;
2534	OUTPUT:	3062	OUTPUT:
2535	RETVAL	3063	RETVAL
2536		3064
2537	# for async_pool speedup
2538	void	3065	void
2539	_pool_1 (SV *cb)	3066	_pool_handler (...)
2540	CODE:	3067	CODE:
2541	{	3068	CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
2542	HV *hv = (HV *)SvRV (coro_current);
2543	struct coro *coro = SvSTATE_hv ((SV *)hv);
2544	AV *defav = GvAV (PL_defgv);
2545	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2546	AV *invoke_av;
2547	int i, len;
2548
2549	if (!invoke)
2550	{
2551	SV *old = PL_diehook;
2552	PL_diehook = 0;
2553	SvREFCNT_dec (old);
2554	croak ("\3async_pool terminate\2\n");
2555	}
2556
2557	SvREFCNT_dec (coro->saved_deffh);
2558	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2559
2560	hv_store (hv, "desc", sizeof ("desc") - 1,
2561	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2562
2563	invoke_av = (AV *)SvRV (invoke);
2564	len = av_len (invoke_av);
2565
2566	sv_setsv (cb, AvARRAY (invoke_av)[0]);
2567
2568	if (len > 0)
2569	{
2570	av_fill (defav, len - 1);
2571	for (i = 0; i < len; ++i)
2572	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2573	}
2574	}
2575		3069
2576	void	3070	void
2577	_pool_2 (SV *cb)	3071	async_pool (SV *cv, ...)
2578	CODE:
2579	{
2580	HV *hv = (HV *)SvRV (coro_current);
2581	struct coro *coro = SvSTATE_hv ((SV *)hv);
2582
2583	sv_setsv (cb, &PL_sv_undef);
2584
2585	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2586	coro->saved_deffh = 0;
2587
2588	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2589	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2590	{
2591	SV *old = PL_diehook;
2592	PL_diehook = 0;
2593	SvREFCNT_dec (old);
2594	croak ("\3async_pool terminate\2\n");
2595	}
2596
2597	av_clear (GvAV (PL_defgv));
2598	hv_store (hv, "desc", sizeof ("desc") - 1,
2599	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2600
2601	coro->prio = 0;
2602
2603	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2604	api_trace (aTHX_ coro_current, 0);
2605
2606	av_push (av_async_pool, newSVsv (coro_current));
2607	}
2608
2609
2610	MODULE = Coro::State PACKAGE = Coro::AIO
2611
2612	void
2613	_get_state (SV *self)
2614	PROTOTYPE: $	3072	PROTOTYPE: &@
2615	PPCODE:	3073	PPCODE:
2616	{	3074	{
2617	AV *defav = GvAV (PL_defgv);	3075	HV *hv = (HV *)av_pop (av_async_pool);
2618	AV *av = newAV ();	3076	AV *av = newAV ();
		3077	SV *cb = ST (0);
2619	int i;	3078	int i;
2620	SV *data_sv = newSV (sizeof (struct io_state));
2621	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2622	SvCUR_set (data_sv, sizeof (struct io_state));
2623	SvPOK_only (data_sv);
2624		3079
2625	data->errorno = errno;	3080	av_extend (av, items - 2);
2626	data->laststype = PL_laststype;	3081	for (i = 1; i < items; ++i)
2627	data->laststatval = PL_laststatval;
2628	data->statcache = PL_statcache;
2629
2630	av_extend (av, AvFILLp (defav) + 1 + 1);
2631
2632	for (i = 0; i <= AvFILLp (defav); ++i)
2633	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));	3082	av_push (av, SvREFCNT_inc_NN (ST (i)));
2634		3083
2635	av_push (av, data_sv);	3084	if ((SV *)hv == &PL_sv_undef)
2636
2637	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2638
2639	api_ready (aTHX_ self);
2640	}
2641
2642	void
2643	_set_state (SV *state)
2644	PROTOTYPE: $
2645	PPCODE:
2646	{
2647	AV *av = (AV *)SvRV (state);
2648	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2649	int i;
2650
2651	errno = data->errorno;
2652	PL_laststype = data->laststype;
2653	PL_laststatval = data->laststatval;
2654	PL_statcache = data->statcache;
2655
2656	EXTEND (SP, AvFILLp (av));
2657	for (i = 0; i < AvFILLp (av); ++i)
2658	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2659	}
2660
2661
2662	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2663
2664	BOOT:
2665	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2666
2667	void
2668	_schedule (...)
2669	CODE:
2670	{
2671	static int incede;
2672
2673	api_cede_notself (aTHX);
2674
2675	++incede;
2676	while (coro_nready >= incede && api_cede (aTHX))
2677	;
2678
2679	sv_setsv (sv_activity, &PL_sv_undef);
2680	if (coro_nready >= incede)
2681	{	3085	{
2682	PUSHMARK (SP);	3086	PUSHMARK (SP);
		3087	EXTEND (SP, 2);
		3088	PUSHs (sv_Coro);
		3089	PUSHs ((SV *)cv_pool_handler);
2683	PUTBACK;	3090	PUTBACK;
2684	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);	3091	call_sv ((SV *)cv_coro_new, G_SCALAR);
2685	SPAGAIN;	3092	SPAGAIN;
		3093
		3094	hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
2686	}	3095	}
2687		3096
2688	--incede;	3097	{
		3098	struct coro *coro = SvSTATE_hv (hv);
		3099
		3100	assert (!coro->invoke_cb);
		3101	assert (!coro->invoke_av);
		3102	coro->invoke_cb = SvREFCNT_inc (cb);
		3103	coro->invoke_av = av;
		3104	}
		3105
		3106	api_ready (aTHX_ (SV *)hv);
		3107
		3108	if (GIMME_V != G_VOID)
		3109	XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
		3110	else
		3111	SvREFCNT_dec (hv);
2689	}	3112	}
		3113
		3114	SV *
		3115	rouse_cb ()
		3116	PROTOTYPE:
		3117	CODE:
		3118	RETVAL = coro_new_rouse_cb (aTHX);
		3119	OUTPUT:
		3120	RETVAL
		3121
		3122	void
		3123	rouse_wait (...)
		3124	PROTOTYPE: ;$
		3125	PPCODE:
		3126	CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2690		3127
2691		3128
2692	MODULE = Coro::State PACKAGE = PerlIO::cede	3129	MODULE = Coro::State PACKAGE = PerlIO::cede
2693		3130
2694	BOOT:	3131	BOOT:
2695	PerlIO_define_layer (aTHX_ &PerlIO_cede);	3132	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2696		3133
		3134
2697	MODULE = Coro::State PACKAGE = Coro::Semaphore	3135	MODULE = Coro::State PACKAGE = Coro::Semaphore
2698		3136
2699	SV *	3137	SV *
2700	new (SV *klass, SV *count_ = 0)	3138	new (SV *klass, SV *count = 0)
2701	CODE:	3139	CODE:
2702	{	3140	RETVAL = sv_bless (
2703	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */	3141	coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
2704	AV *av = newAV ();	3142	GvSTASH (CvGV (cv))
2705	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));	3143	);
2706	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));	3144	OUTPUT:
2707	}	3145	RETVAL
		3146
		3147	# helper for Coro::Channel
		3148	SV *
		3149	_alloc (int count)
		3150	CODE:
		3151	RETVAL = coro_waitarray_new (aTHX_ count);
2708	OUTPUT:	3152	OUTPUT:
2709	RETVAL	3153	RETVAL
2710		3154
2711	SV *	3155	SV *
2712	count (SV *self)	3156	count (SV *self)
…		…
2721	adjust = 1	3165	adjust = 1
2722	CODE:	3166	CODE:
2723	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);	3167	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2724		3168
2725	void	3169	void
2726	down (SV *self)	3170	down (...)
2727	CODE:	3171	CODE:
2728	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);	3172	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		3173
		3174	void
		3175	wait (...)
		3176	CODE:
		3177	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2729		3178
2730	void	3179	void
2731	try (SV *self)	3180	try (SV *self)
2732	PPCODE:	3181	PPCODE:
2733	{	3182	{
…		…
2745	XSRETURN_NO;	3194	XSRETURN_NO;
2746	}	3195	}
2747		3196
2748	void	3197	void
2749	waiters (SV *self)	3198	waiters (SV *self)
2750	CODE:	3199	PPCODE:
2751	{	3200	{
2752	AV *av = (AV *)SvRV (self);	3201	AV *av = (AV *)SvRV (self);
		3202	int wcount = AvFILLp (av) + 1 - 1;
2753		3203
2754	if (GIMME_V == G_SCALAR)	3204	if (GIMME_V == G_SCALAR)
2755	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));	3205	XPUSHs (sv_2mortal (newSViv (wcount)));
2756	else	3206	else
2757	{	3207	{
2758	int i;	3208	int i;
2759	EXTEND (SP, AvFILLp (av) + 1 - 1);	3209	EXTEND (SP, wcount);
2760	for (i = 1; i <= AvFILLp (av); ++i)	3210	for (i = 1; i <= wcount; ++i)
2761	PUSHs (newSVsv (AvARRAY (av)[i]));	3211	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2762	}	3212	}
2763	}	3213	}
2764		3214
		3215	MODULE = Coro::State PACKAGE = Coro::Signal
		3216
		3217	SV *
		3218	new (SV *klass)
		3219	CODE:
		3220	RETVAL = sv_bless (
		3221	coro_waitarray_new (aTHX_ 0),
		3222	GvSTASH (CvGV (cv))
		3223	);
		3224	OUTPUT:
		3225	RETVAL
		3226
		3227	void
		3228	wait (...)
		3229	CODE:
		3230	CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
		3231
		3232	void
		3233	broadcast (SV *self)
		3234	CODE:
		3235	{
		3236	AV *av = (AV *)SvRV (self);
		3237	coro_signal_wake (aTHX_ av, AvFILLp (av));
		3238	}
		3239
		3240	void
		3241	send (SV *self)
		3242	CODE:
		3243	{
		3244	AV *av = (AV *)SvRV (self);
		3245
		3246	if (AvFILLp (av))
		3247	coro_signal_wake (aTHX_ av, 1);
		3248	else
		3249	SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
		3250	}
		3251
		3252	IV
		3253	awaited (SV *self)
		3254	CODE:
		3255	RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
		3256	OUTPUT:
		3257	RETVAL
		3258
		3259
		3260	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		3261
		3262	BOOT:
		3263	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		3264
		3265	void
		3266	_schedule (...)
		3267	CODE:
		3268	{
		3269	static int incede;
		3270
		3271	api_cede_notself (aTHX);
		3272
		3273	++incede;
		3274	while (coro_nready >= incede && api_cede (aTHX))
		3275	;
		3276
		3277	sv_setsv (sv_activity, &PL_sv_undef);
		3278	if (coro_nready >= incede)
		3279	{
		3280	PUSHMARK (SP);
		3281	PUTBACK;
		3282	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		3283	}
		3284
		3285	--incede;
		3286	}
		3287
		3288
		3289	MODULE = Coro::State PACKAGE = Coro::AIO
		3290
		3291	void
		3292	_register (char *target, char *proto, SV *req)
		3293	CODE:
		3294	{
		3295	CV *req_cv = coro_sv_2cv (aTHX_ req);
		3296	/* newXSproto doesn't return the CV on 5.8 */
		3297	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		3298	sv_setpv ((SV *)slf_cv, proto);
		3299	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		3300	}
		3301

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