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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.286 by root, Mon Nov 17 04:19:49 2008 UTC vs.
Revision 1.312 by root, Thu Nov 20 03:10:30 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	int i, len;
		1766
		1767	hv_store (hv, "desc", sizeof ("desc") - 1,
		1768	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1769
		1770	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
		1771
		1772	len = av_len (coro->invoke_av);
		1773
		1774	{
		1775	dSP;
		1776	XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
		1777	PUTBACK;
		1778	}
		1779
		1780	SvREFCNT_dec (GvAV (PL_defgv));
		1781	GvAV (PL_defgv) = coro->invoke_av;
		1782	coro->invoke_av = 0;
		1783
		1784	return 0;
		1785	}
		1786	}
		1787
		1788	static void
		1789	slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1790	{
		1791	HV *hv = (HV *)SvRV (coro_current);
		1792	struct coro *coro = SvSTATE_hv ((SV *)hv);
		1793
		1794	if (expect_true (coro->saved_deffh))
		1795	{
		1796	/* subsequent iteration */
		1797	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1798	coro->saved_deffh = 0;
		1799
		1800	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
		1801	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1802	{
		1803	coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
		1804	coro->invoke_av = newAV ();
		1805
		1806	frame->prepare = prepare_nop;
		1807	}
		1808	else
		1809	{
		1810	av_clear (GvAV (PL_defgv));
		1811	hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
		1812
		1813	coro->prio = 0;
		1814
		1815	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1816	api_trace (aTHX_ coro_current, 0);
		1817
		1818	frame->prepare = prepare_schedule;
		1819	av_push (av_async_pool, SvREFCNT_inc (hv));
		1820	}
		1821	}
		1822	else
		1823	{
		1824	/* first iteration, simply fall through */
		1825	frame->prepare = prepare_nop;
		1826	}
		1827
		1828	frame->check = slf_check_pool_handler;
		1829	frame->data = (void *)coro;
		1830	}
		1831
		1832	/*****************************************************************************/
		1833	/* rouse callback */
		1834
		1835	#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
		1836
		1837	static void
		1838	coro_rouse_callback (pTHX_ CV *cv)
		1839	{
		1840	dXSARGS;
		1841	SV *data = (SV *)GENSUB_ARG;
		1842
		1843	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1844	{
		1845	/* first call, set args */
		1846	int i;
		1847	AV *av = newAV ();
		1848	SV *coro = SvRV (data);
		1849
		1850	SvRV_set (data, (SV *)av);
		1851	api_ready (aTHX_ coro);
		1852	SvREFCNT_dec (coro);
		1853
		1854	/* better take a full copy of the arguments */
		1855	while (items--)
		1856	av_store (av, items, newSVsv (ST (items)));
		1857	}
		1858
		1859	XSRETURN_EMPTY;
		1860	}
		1861
		1862	static int
		1863	slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
		1864	{
		1865	SV *data = (SV *)frame->data;
		1866
		1867	if (CORO_THROW)
		1868	return 0;
		1869
		1870	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1871	return 1;
		1872
		1873	/* now push all results on the stack */
		1874	{
		1875	dSP;
		1876	AV *av = (AV *)SvRV (data);
		1877	int i;
		1878
		1879	EXTEND (SP, AvFILLp (av) + 1);
		1880	for (i = 0; i <= AvFILLp (av); ++i)
		1881	PUSHs (sv_2mortal (AvARRAY (av)[i]));
		1882
		1883	/* we have stolen the elements, so ste length to zero and free */
		1884	AvFILLp (av) = -1;
		1885	av_undef (av);
		1886
		1887	PUTBACK;
		1888	}
		1889
		1890	return 0;
		1891	}
		1892
		1893	static void
		1894	slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1895	{
		1896	SV *cb;
		1897
		1898	if (items)
		1899	cb = arg [0];
		1900	else
		1901	{
		1902	struct coro *coro = SvSTATE_current;
		1903
		1904	if (!coro->rouse_cb)
		1905	croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
		1906
		1907	cb = sv_2mortal (coro->rouse_cb);
		1908	coro->rouse_cb = 0;
		1909	}
		1910
		1911	if (!SvROK (cb)
		1912	|| SvTYPE (SvRV (cb)) != SVt_PVCV
		1913	|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
		1914	croak ("Coro::rouse_wait called with illegal callback argument,");
		1915
		1916	{
		1917	CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
		1918	SV *data = (SV *)GENSUB_ARG;
		1919
		1920	frame->data = (void *)data;
		1921	frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
		1922	frame->check = slf_check_rouse_wait;
		1923	}
		1924	}
		1925
		1926	static SV *
		1927	coro_new_rouse_cb (pTHX)
		1928	{
		1929	HV *hv = (HV *)SvRV (coro_current);
		1930	struct coro *coro = SvSTATE_hv (hv);
		1931	SV *data = newRV_inc ((SV *)hv);
		1932	SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
		1933
		1934	sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
		1935	SvREFCNT_dec (data); /* magicext increases the refcount */
		1936
		1937	SvREFCNT_dec (coro->rouse_cb);
		1938	coro->rouse_cb = SvREFCNT_inc_NN (cb);
		1939
		1940	return cb;
		1941	}
		1942
		1943	/*****************************************************************************/
		1944	/* schedule-like-function opcode (SLF) */
		1945
		1946	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1947	static const CV *slf_cv;
		1948	static SV **slf_argv;
		1949	static int slf_argc, slf_arga; /* count, allocated */
		1950	static I32 slf_ax; /* top of stack, for restore */
		1951
		1952	/* this restores the stack in the case we patched the entersub, to */
		1953	/* recreate the stack frame as perl will on following calls */
		1954	/* since entersub cleared the stack */
		1955	static OP *
		1956	pp_restore (pTHX)
		1957	{
		1958	int i;
		1959	SV **SP = PL_stack_base + slf_ax;
		1960
		1961	PUSHMARK (SP);
		1962
		1963	EXTEND (SP, slf_argc + 1);
		1964
		1965	for (i = 0; i < slf_argc; ++i)
		1966	PUSHs (sv_2mortal (slf_argv [i]));
		1967
		1968	PUSHs ((SV *)CvGV (slf_cv));
		1969
		1970	RETURNOP (slf_restore.op_first);
		1971	}
		1972
		1973	static void
		1974	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1975	{
		1976	SV **arg = (SV **)slf_frame.data;
		1977
		1978	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1979	}
		1980
		1981	static void
		1982	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1983	{
		1984	if (items != 2)
		1985	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1986
		1987	frame->prepare = slf_prepare_transfer;
		1988	frame->check = slf_check_nop;
		1989	frame->data = (void *)arg; /* let's hope it will stay valid */
		1990	}
		1991
		1992	static void
		1993	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1994	{
		1995	frame->prepare = prepare_schedule;
		1996	frame->check = slf_check_nop;
		1997	}
		1998
		1999	static void
		2000	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2001	{
		2002	frame->prepare = prepare_cede;
		2003	frame->check = slf_check_nop;
		2004	}
		2005
		2006	static void
		2007	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2008	{
		2009	frame->prepare = prepare_cede_notself;
		2010	frame->check = slf_check_nop;
		2011	}
		2012
		2013	/*
		2014	* these not obviously related functions are all rolled into one
		2015	* function to increase chances that they all will call transfer with the same
		2016	* stack offset
		2017	* SLF stands for "schedule-like-function".
		2018	*/
		2019	static OP *
		2020	pp_slf (pTHX)
		2021	{
		2022	I32 checkmark; /* mark SP to see how many elements check has pushed */
		2023
		2024	/* set up the slf frame, unless it has already been set-up */
		2025	/* the latter happens when a new coro has been started */
		2026	/* or when a new cctx was attached to an existing coroutine */
		2027	if (expect_true (!slf_frame.prepare))
		2028	{
		2029	/* first iteration */
		2030	dSP;
		2031	SV **arg = PL_stack_base + TOPMARK + 1;
		2032	int items = SP - arg; /* args without function object */
		2033	SV *gv = *sp;
		2034
		2035	/* do a quick consistency check on the "function" object, and if it isn't */
		2036	/* for us, divert to the real entersub */
		2037	if (SvTYPE (gv) != SVt_PVGV
		2038	|| !GvCV (gv)
		2039	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		2040	return PL_ppaddr[OP_ENTERSUB](aTHX);
		2041
		2042	if (!(PL_op->op_flags & OPf_STACKED))
		2043	{
		2044	/* ampersand-form of call, use @_ instead of stack */
		2045	AV *av = GvAV (PL_defgv);
		2046	arg = AvARRAY (av);
		2047	items = AvFILLp (av) + 1;
		2048	}
		2049
		2050	/* now call the init function, which needs to set up slf_frame */
		2051	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		2052	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		2053
		2054	/* pop args */
		2055	SP = PL_stack_base + POPMARK;
		2056
		2057	PUTBACK;
		2058	}
		2059
		2060	/* now that we have a slf_frame, interpret it! */
		2061	/* we use a callback system not to make the code needlessly */
		2062	/* complicated, but so we can run multiple perl coros from one cctx */
		2063
		2064	do
		2065	{
		2066	struct coro_transfer_args ta;
		2067
		2068	slf_frame.prepare (aTHX_ &ta);
		2069	TRANSFER (ta, 0);
		2070
		2071	checkmark = PL_stack_sp - PL_stack_base;
		2072	}
		2073	while (slf_frame.check (aTHX_ &slf_frame));
		2074
		2075	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		2076
		2077	/* exception handling */
		2078	if (expect_false (CORO_THROW))
		2079	{
		2080	SV *exception = sv_2mortal (CORO_THROW);
		2081
		2082	CORO_THROW = 0;
		2083	sv_setsv (ERRSV, exception);
		2084	croak (0);
		2085	}
		2086
		2087	/* return value handling - mostly like entersub */
		2088	/* make sure we put something on the stack in scalar context */
		2089	if (GIMME_V == G_SCALAR)
		2090	{
		2091	dSP;
		2092	SV **bot = PL_stack_base + checkmark;
		2093
		2094	if (sp == bot) /* too few, push undef */
		2095	bot [1] = &PL_sv_undef;
		2096	else if (sp != bot + 1) /* too many, take last one */
		2097	bot [1] = *sp;
		2098
		2099	SP = bot + 1;
		2100
		2101	PUTBACK;
		2102	}
		2103
		2104	return NORMAL;
		2105	}
		2106
		2107	static void
		2108	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		2109	{
		2110	int i;
		2111	SV **arg = PL_stack_base + ax;
		2112	int items = PL_stack_sp - arg + 1;
		2113
		2114	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		2115
		2116	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		2117	&& PL_op->op_ppaddr != pp_slf)
		2118	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		2119
		2120	CvFLAGS (cv) |= CVf_SLF;
		2121	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		2122	slf_cv = cv;
		2123
		2124	/* we patch the op, and then re-run the whole call */
		2125	/* we have to put the same argument on the stack for this to work */
		2126	/* and this will be done by pp_restore */
		2127	slf_restore.op_next = (OP *)&slf_restore;
		2128	slf_restore.op_type = OP_CUSTOM;
		2129	slf_restore.op_ppaddr = pp_restore;
		2130	slf_restore.op_first = PL_op;
		2131
		2132	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		2133
		2134	if (PL_op->op_flags & OPf_STACKED)
		2135	{
		2136	if (items > slf_arga)
		2137	{
		2138	slf_arga = items;
		2139	free (slf_argv);
		2140	slf_argv = malloc (slf_arga * sizeof (SV *));
		2141	}
		2142
		2143	slf_argc = items;
		2144
		2145	for (i = 0; i < items; ++i)
		2146	slf_argv [i] = SvREFCNT_inc (arg [i]);
		2147	}
		2148	else
		2149	slf_argc = 0;
		2150
		2151	PL_op->op_ppaddr = pp_slf;
		2152	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		2153
		2154	PL_op = (OP *)&slf_restore;
1702	}	2155	}
1703		2156
1704	/*****************************************************************************/	2157	/*****************************************************************************/
1705	/* PerlIO::cede */	2158	/* PerlIO::cede */
1706		2159
…		…
1775	PerlIOBuf_get_cnt,	2228	PerlIOBuf_get_cnt,
1776	PerlIOBuf_set_ptrcnt,	2229	PerlIOBuf_set_ptrcnt,
1777	};	2230	};
1778		2231
1779	/*****************************************************************************/	2232	/*****************************************************************************/
		2233	/* Coro::Semaphore & Coro::Signal */
1780		2234
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 *	2235	static SV *
1791	pp_restore (pTHX)	2236	coro_waitarray_new (pTHX_ int count)
1792	{	2237	{
1793	int i;	2238	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1794	SV **SP = PL_stack_base + slf_ax;	2239	AV *av = newAV ();
		2240	SV **ary;
1795		2241
1796	PUSHMARK (SP);	2242	/* unfortunately, building manually saves memory */
		2243	Newx (ary, 2, SV *);
		2244	AvALLOC (av) = ary;
		2245	/*AvARRAY (av) = ary;*/
		2246	SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
		2247	AvMAX (av) = 1;
		2248	AvFILLp (av) = 0;
		2249	ary [0] = newSViv (count);
1797		2250
1798	EXTEND (SP, slf_argc + 1);	2251	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	}	2252	}
1807		2253
1808	static void	2254	/* 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 (PL_op->op_flags & OPf_STACKED)
1988	{
1989	if (items > slf_arga)
1990	{
1991	slf_arga = items;
1992	free (slf_argv);
1993	slf_argv = malloc (slf_arga * sizeof (SV *));
1994	}
1995
1996	slf_argc = items;
1997
1998	for (i = 0; i < items; ++i)
1999	slf_argv [i] = SvREFCNT_inc (arg [i]);
2000	}
2001	else
2002	slf_argc = 0;
2003
2004	PL_op->op_ppaddr = pp_slf;
2005	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2006
2007	PL_op = (OP *)&slf_restore;
2008	}
2009
2010	/*****************************************************************************/
2011		2255
2012	static void	2256	static void
2013	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)	2257	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2014	{	2258	{
2015	SV *count_sv = AvARRAY (av)[0];	2259	SV *count_sv = AvARRAY (av)[0];
…		…
2027	AvARRAY (av)[0] = AvARRAY (av)[1];	2271	AvARRAY (av)[0] = AvARRAY (av)[1];
2028	AvARRAY (av)[1] = count_sv;	2272	AvARRAY (av)[1] = count_sv;
2029	cb = av_shift (av);	2273	cb = av_shift (av);
2030		2274
2031	if (SvOBJECT (cb))	2275	if (SvOBJECT (cb))
		2276	{
2032	api_ready (aTHX_ cb);	2277	api_ready (aTHX_ cb);
2033	else	2278	--count;
2034	croak ("callbacks not yet supported");	2279	}
		2280	else if (SvTYPE (cb) == SVt_PVCV)
		2281	{
		2282	dSP;
		2283	PUSHMARK (SP);
		2284	XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
		2285	PUTBACK;
		2286	call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
		2287	}
2035		2288
2036	SvREFCNT_dec (cb);	2289	SvREFCNT_dec (cb);
2037
2038	--count;
2039	}	2290	}
2040	}	2291	}
2041		2292
2042	static void	2293	static void
2043	coro_semaphore_on_destroy (pTHX_ struct coro *coro)	2294	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
…		…
2045	/* call $sem->adjust (0) to possibly wake up some other waiters */	2296	/* call $sem->adjust (0) to possibly wake up some other waiters */
2046	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);	2297	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2047	}	2298	}
2048		2299
2049	static int	2300	static int
2050	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)	2301	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2051	{	2302	{
2052	AV *av = (AV *)frame->data;	2303	AV *av = (AV *)frame->data;
2053	SV *count_sv = AvARRAY (av)[0];	2304	SV *count_sv = AvARRAY (av)[0];
2054		2305
		2306	/* if we are about to throw, don't actually acquire the lock, just throw */
		2307	if (CORO_THROW)
		2308	return 0;
2055	if (SvIVX (count_sv) > 0)	2309	else if (SvIVX (count_sv) > 0)
2056	{	2310	{
2057	SvSTATE_current->on_destroy = 0;	2311	SvSTATE_current->on_destroy = 0;
		2312
		2313	if (acquire)
2058	SvIVX (count_sv) = SvIVX (count_sv) - 1;	2314	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2315	else
		2316	coro_semaphore_adjust (aTHX_ av, 0);
		2317
2059	return 0;	2318	return 0;
2060	}	2319	}
2061	else	2320	else
2062	{	2321	{
2063	int i;	2322	int i;
…		…
2072	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2331	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2073	return 1;	2332	return 1;
2074	}	2333	}
2075	}	2334	}
2076		2335
2077	static void	2336	static int
		2337	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2338	{
		2339	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2340	}
		2341
		2342	static int
		2343	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2344	{
		2345	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2346	}
		2347
		2348	static void
2078	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)	2349	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2079	{	2350	{
2080	AV *av = (AV *)SvRV (arg [0]);	2351	AV *av = (AV *)SvRV (arg [0]);
2081		2352
2082	if (SvIVX (AvARRAY (av)[0]) > 0)	2353	if (SvIVX (AvARRAY (av)[0]) > 0)
2083	{	2354	{
2084	frame->data = (void *)av;	2355	frame->data = (void *)av;
2085	frame->prepare = prepare_nop;	2356	frame->prepare = prepare_nop;
2086	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2087	}	2357	}
2088	else	2358	else
2089	{	2359	{
2090	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2360	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2091		2361
2092	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));	2362	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2093	frame->prepare = prepare_schedule;	2363	frame->prepare = prepare_schedule;
2094		2364
2095	/* to avoid race conditions when a woken-up coro gets terminated */	2365	/* to avoid race conditions when a woken-up coro gets terminated */
2096	/* we arrange for a temporary on_destroy that calls adjust (0) */	2366	/* we arrange for a temporary on_destroy that calls adjust (0) */
2097	assert (!SvSTATE_current->on_destroy);//D
2098	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;	2367	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2099	}	2368	}
		2369	}
2100		2370
		2371	static void
		2372	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2373	{
		2374	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2101	frame->check = slf_check_semaphore_down;	2375	frame->check = slf_check_semaphore_down;
		2376	}
2102		2377
		2378	static void
		2379	slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2380	{
		2381	if (items >= 2)
		2382	{
		2383	/* callback form */
		2384	AV *av = (AV *)SvRV (arg [0]);
		2385	CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
		2386
		2387	av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
		2388
		2389	if (SvIVX (AvARRAY (av)[0]) > 0)
		2390	coro_semaphore_adjust (aTHX_ av, 0);
		2391
		2392	frame->prepare = prepare_nop;
		2393	frame->check = slf_check_nop;
		2394	}
		2395	else
		2396	{
		2397	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2398	frame->check = slf_check_semaphore_wait;
		2399	}
		2400	}
		2401
		2402	/* signal */
		2403
		2404	static void
		2405	coro_signal_wake (pTHX_ AV *av, int count)
		2406	{
		2407	SvIVX (AvARRAY (av)[0]) = 0;
		2408
		2409	/* now signal count waiters */
		2410	while (count > 0 && AvFILLp (av) > 0)
		2411	{
		2412	SV *cb;
		2413
		2414	/* swap first two elements so we can shift a waiter */
		2415	cb = AvARRAY (av)[0];
		2416	AvARRAY (av)[0] = AvARRAY (av)[1];
		2417	AvARRAY (av)[1] = cb;
		2418
		2419	cb = av_shift (av);
		2420
		2421	api_ready (aTHX_ cb);
		2422	sv_setiv (cb, 0); /* signal waiter */
		2423	SvREFCNT_dec (cb);
		2424
		2425	--count;
		2426	}
		2427	}
		2428
		2429	static int
		2430	slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
		2431	{
		2432	/* if we are about to throw, also stop waiting */
		2433	return SvROK ((SV *)frame->data) && !CORO_THROW;
		2434	}
		2435
		2436	static void
		2437	slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2438	{
		2439	AV *av = (AV *)SvRV (arg [0]);
		2440
		2441	if (SvIVX (AvARRAY (av)[0]))
		2442	{
		2443	SvIVX (AvARRAY (av)[0]) = 0;
		2444	frame->prepare = prepare_nop;
		2445	frame->check = slf_check_nop;
		2446	}
		2447	else
		2448	{
		2449	SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
		2450
		2451	av_push (av, waiter);
		2452
		2453	frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
		2454	frame->prepare = prepare_schedule;
		2455	frame->check = slf_check_signal_wait;
		2456	}
2103	}	2457	}
2104		2458
2105	/*****************************************************************************/	2459	/*****************************************************************************/
		2460	/* Coro::AIO */
2106		2461
2107	#define GENSUB_ARG CvXSUBANY (cv).any_ptr	2462	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2108		2463
2109	/* create a closure from XS, returns a code reference */	2464	/* helper storage struct */
2110	/* the arg can be accessed via GENSUB_ARG from the callback */	2465	struct io_state
2111	/* the callback must use dXSARGS/XSRETURN */
2112	static SV *
2113	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2114	{	2466	{
2115	CV *cv = (CV *)NEWSV (0, 0);	2467	int errorno;
		2468	I32 laststype; /* U16 in 5.10.0 */
		2469	int laststatval;
		2470	Stat_t statcache;
		2471	};
2116		2472
		2473	static void
		2474	coro_aio_callback (pTHX_ CV *cv)
		2475	{
		2476	dXSARGS;
		2477	AV *state = (AV *)GENSUB_ARG;
		2478	SV *coro = av_pop (state);
		2479	SV *data_sv = newSV (sizeof (struct io_state));
		2480
		2481	av_extend (state, items - 1);
		2482
2117	sv_upgrade ((SV *)cv, SVt_PVCV);	2483	sv_upgrade (data_sv, SVt_PV);
		2484	SvCUR_set (data_sv, sizeof (struct io_state));
		2485	SvPOK_only (data_sv);
2118		2486
2119	CvANON_on (cv);	2487	{
2120	CvISXSUB_on (cv);	2488	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2121	CvXSUB (cv) = xsub;
2122	GENSUB_ARG = arg;
2123		2489
2124	return newRV_noinc ((SV *)cv);	2490	data->errorno = errno;
		2491	data->laststype = PL_laststype;
		2492	data->laststatval = PL_laststatval;
		2493	data->statcache = PL_statcache;
		2494	}
		2495
		2496	/* now build the result vector out of all the parameters and the data_sv */
		2497	{
		2498	int i;
		2499
		2500	for (i = 0; i < items; ++i)
		2501	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2502	}
		2503
		2504	av_push (state, data_sv);
		2505
		2506	api_ready (aTHX_ coro);
		2507	SvREFCNT_dec (coro);
		2508	SvREFCNT_dec ((AV *)state);
		2509	}
		2510
		2511	static int
		2512	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2513	{
		2514	AV *state = (AV *)frame->data;
		2515
		2516	/* if we are about to throw, return early */
		2517	/* this does not cancel the aio request, but at least */
		2518	/* it quickly returns */
		2519	if (CORO_THROW)
		2520	return 0;
		2521
		2522	/* one element that is an RV? repeat! */
		2523	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2524	return 1;
		2525
		2526	/* restore status */
		2527	{
		2528	SV *data_sv = av_pop (state);
		2529	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2530
		2531	errno = data->errorno;
		2532	PL_laststype = data->laststype;
		2533	PL_laststatval = data->laststatval;
		2534	PL_statcache = data->statcache;
		2535
		2536	SvREFCNT_dec (data_sv);
		2537	}
		2538
		2539	/* push result values */
		2540	{
		2541	dSP;
		2542	int i;
		2543
		2544	EXTEND (SP, AvFILLp (state) + 1);
		2545	for (i = 0; i <= AvFILLp (state); ++i)
		2546	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2547
		2548	PUTBACK;
		2549	}
		2550
		2551	return 0;
		2552	}
		2553
		2554	static void
		2555	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2556	{
		2557	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2558	SV *coro_hv = SvRV (coro_current);
		2559	struct coro *coro = SvSTATE_hv (coro_hv);
		2560
		2561	/* put our coroutine id on the state arg */
		2562	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2563
		2564	/* first see whether we have a non-zero priority and set it as AIO prio */
		2565	if (coro->prio)
		2566	{
		2567	dSP;
		2568
		2569	static SV *prio_cv;
		2570	static SV *prio_sv;
		2571
		2572	if (expect_false (!prio_cv))
		2573	{
		2574	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2575	prio_sv = newSViv (0);
		2576	}
		2577
		2578	PUSHMARK (SP);
		2579	sv_setiv (prio_sv, coro->prio);
		2580	XPUSHs (prio_sv);
		2581
		2582	PUTBACK;
		2583	call_sv (prio_cv, G_VOID | G_DISCARD);
		2584	}
		2585
		2586	/* now call the original request */
		2587	{
		2588	dSP;
		2589	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2590	int i;
		2591
		2592	PUSHMARK (SP);
		2593
		2594	/* first push all args to the stack */
		2595	EXTEND (SP, items + 1);
		2596
		2597	for (i = 0; i < items; ++i)
		2598	PUSHs (arg [i]);
		2599
		2600	/* now push the callback closure */
		2601	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
		2602
		2603	/* now call the AIO function - we assume our request is uncancelable */
		2604	PUTBACK;
		2605	call_sv ((SV *)req, G_VOID | G_DISCARD);
		2606	}
		2607
		2608	/* now that the requets is going, we loop toll we have a result */
		2609	frame->data = (void *)state;
		2610	frame->prepare = prepare_schedule;
		2611	frame->check = slf_check_aio_req;
		2612	}
		2613
		2614	static void
		2615	coro_aio_req_xs (pTHX_ CV *cv)
		2616	{
		2617	dXSARGS;
		2618
		2619	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2620
		2621	XSRETURN_EMPTY;
2125	}	2622	}
2126		2623
2127	/*****************************************************************************/	2624	/*****************************************************************************/
2128		2625
2129	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2626	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
…		…
2199	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	2696	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2200	}	2697	}
2201		2698
2202	SV *	2699	SV *
2203	new (char *klass, ...)	2700	new (char *klass, ...)
		2701	ALIAS:
		2702	Coro::new = 1
2204	CODE:	2703	CODE:
2205	{	2704	{
2206	struct coro *coro;	2705	struct coro *coro;
2207	MAGIC *mg;	2706	MAGIC *mg;
2208	HV *hv;	2707	HV *hv;
		2708	CV *cb;
2209	int i;	2709	int i;
		2710
		2711	if (items > 1)
		2712	{
		2713	cb = coro_sv_2cv (aTHX_ ST (1));
		2714
		2715	if (!ix)
		2716	{
		2717	if (CvISXSUB (cb))
		2718	croak ("Coro::State doesn't support XS functions as coroutine start, caught");
		2719
		2720	if (!CvROOT (cb))
		2721	croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
		2722	}
		2723	}
2210		2724
2211	Newz (0, coro, 1, struct coro);	2725	Newz (0, coro, 1, struct coro);
2212	coro->args = newAV ();	2726	coro->args = newAV ();
2213	coro->flags = CF_NEW;	2727	coro->flags = CF_NEW;
2214		2728
…		…
2219	coro->hv = hv = newHV ();	2733	coro->hv = hv = newHV ();
2220	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);	2734	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2221	mg->mg_flags |= MGf_DUP;	2735	mg->mg_flags |= MGf_DUP;
2222	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	2736	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2223		2737
		2738	if (items > 1)
		2739	{
2224	av_extend (coro->args, items - 1);	2740	av_extend (coro->args, items - 1 + ix - 1);
		2741
		2742	if (ix)
		2743	{
		2744	av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
		2745	cb = cv_coro_run;
		2746	}
		2747
		2748	coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
		2749
2225	for (i = 1; i < items; i++)	2750	for (i = 2; i < items; i++)
2226	av_push (coro->args, newSVsv (ST (i)));	2751	av_push (coro->args, newSVsv (ST (i)));
		2752	}
2227	}	2753	}
2228	OUTPUT:	2754	OUTPUT:
2229	RETVAL	2755	RETVAL
2230
2231	void
2232	_set_stacklevel (...)
2233	CODE:
2234	CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
2235		2756
2236	void	2757	void
2237	transfer (...)	2758	transfer (...)
2238	PROTOTYPE: $$	2759	PROTOTYPE: $$
2239	CODE:	2760	CODE:
…		…
2365	throw (Coro::State self, SV *throw = &PL_sv_undef)	2886	throw (Coro::State self, SV *throw = &PL_sv_undef)
2366	PROTOTYPE: $;$	2887	PROTOTYPE: $;$
2367	CODE:	2888	CODE:
2368	{	2889	{
2369	struct coro *current = SvSTATE_current;	2890	struct coro *current = SvSTATE_current;
2370	SV **throwp = self == current ? &coro_throw : &self->throw;	2891	SV **throwp = self == current ? &CORO_THROW : &self->except;
2371	SvREFCNT_dec (*throwp);	2892	SvREFCNT_dec (*throwp);
2372	*throwp = SvOK (throw) ? newSVsv (throw) : 0;	2893	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
2373	}	2894	}
2374		2895
2375	void	2896	void
…		…
2427	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2948	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2428		2949
2429	SV *tmp = *src; *src = *dst; *dst = tmp;	2950	SV *tmp = *src; *src = *dst; *dst = tmp;
2430	}	2951	}
2431		2952
		2953
2432	MODULE = Coro::State PACKAGE = Coro	2954	MODULE = Coro::State PACKAGE = Coro
2433		2955
2434	BOOT:	2956	BOOT:
2435	{	2957	{
2436	int i;	2958	int i;
2437		2959
2438	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);	2960	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2439	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);	2961	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2440	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);	2962	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2441		2963	cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
		2964	cv_coro_terminate = get_cv ( "Coro::terminate", GV_ADD);
2442	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);	2965	coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2443	SvREADONLY_on (coro_current);	2966	SvREADONLY_on (coro_current);
		2967
		2968	sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
		2969	sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
		2970	cv_pool_handler = get_cv ("Coro::_pool_handler", 0); SvREADONLY_on (cv_pool_handler);
		2971	cv_coro_new = get_cv ("Coro::new", 0); SvREADONLY_on (cv_coro_new);
2444		2972
2445	coro_stash = gv_stashpv ("Coro", TRUE);	2973	coro_stash = gv_stashpv ("Coro", TRUE);
2446		2974
2447	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	2975	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2448	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	2976	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
…		…
2463	coroapi.ready = api_ready;	2991	coroapi.ready = api_ready;
2464	coroapi.is_ready = api_is_ready;	2992	coroapi.is_ready = api_is_ready;
2465	coroapi.nready = coro_nready;	2993	coroapi.nready = coro_nready;
2466	coroapi.current = coro_current;	2994	coroapi.current = coro_current;
2467		2995
2468	GCoroAPI = &coroapi;	2996	/*GCoroAPI = &coroapi;*/
2469	sv_setiv (sv, (IV)&coroapi);	2997	sv_setiv (sv, (IV)&coroapi);
2470	SvREADONLY_on (sv);	2998	SvREADONLY_on (sv);
2471	}	2999	}
2472	}	3000	}
2473		3001
…		…
2537	CODE:	3065	CODE:
2538	RETVAL = coro_nready;	3066	RETVAL = coro_nready;
2539	OUTPUT:	3067	OUTPUT:
2540	RETVAL	3068	RETVAL
2541		3069
2542	# for async_pool speedup
2543	void	3070	void
2544	_pool_1 (SV *cb)	3071	_pool_handler (...)
2545	CODE:	3072	CODE:
2546	{	3073	CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
2547	HV *hv = (HV *)SvRV (coro_current);
2548	struct coro *coro = SvSTATE_hv ((SV *)hv);
2549	AV *defav = GvAV (PL_defgv);
2550	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2551	AV *invoke_av;
2552	int i, len;
2553
2554	if (!invoke)
2555	{
2556	SV *old = PL_diehook;
2557	PL_diehook = 0;
2558	SvREFCNT_dec (old);
2559	croak ("\3async_pool terminate\2\n");
2560	}
2561
2562	SvREFCNT_dec (coro->saved_deffh);
2563	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2564
2565	hv_store (hv, "desc", sizeof ("desc") - 1,
2566	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2567
2568	invoke_av = (AV *)SvRV (invoke);
2569	len = av_len (invoke_av);
2570
2571	sv_setsv (cb, AvARRAY (invoke_av)[0]);
2572
2573	if (len > 0)
2574	{
2575	av_fill (defav, len - 1);
2576	for (i = 0; i < len; ++i)
2577	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2578	}
2579	}
2580		3074
2581	void	3075	void
2582	_pool_2 (SV *cb)	3076	async_pool (SV *cv, ...)
2583	CODE:
2584	{
2585	HV *hv = (HV *)SvRV (coro_current);
2586	struct coro *coro = SvSTATE_hv ((SV *)hv);
2587
2588	sv_setsv (cb, &PL_sv_undef);
2589
2590	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2591	coro->saved_deffh = 0;
2592
2593	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2594	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2595	{
2596	SV *old = PL_diehook;
2597	PL_diehook = 0;
2598	SvREFCNT_dec (old);
2599	croak ("\3async_pool terminate\2\n");
2600	}
2601
2602	av_clear (GvAV (PL_defgv));
2603	hv_store (hv, "desc", sizeof ("desc") - 1,
2604	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2605
2606	coro->prio = 0;
2607
2608	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2609	api_trace (aTHX_ coro_current, 0);
2610
2611	av_push (av_async_pool, newSVsv (coro_current));
2612	}
2613
2614
2615	MODULE = Coro::State PACKAGE = Coro::AIO
2616
2617	void
2618	_get_state (SV *self)
2619	PROTOTYPE: $	3077	PROTOTYPE: &@
2620	PPCODE:	3078	PPCODE:
2621	{	3079	{
2622	AV *defav = GvAV (PL_defgv);	3080	HV *hv = (HV *)av_pop (av_async_pool);
2623	AV *av = newAV ();	3081	AV *av = newAV ();
		3082	SV *cb = ST (0);
2624	int i;	3083	int i;
2625	SV *data_sv = newSV (sizeof (struct io_state));
2626	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2627	SvCUR_set (data_sv, sizeof (struct io_state));
2628	SvPOK_only (data_sv);
2629		3084
2630	data->errorno = errno;	3085	av_extend (av, items - 2);
2631	data->laststype = PL_laststype;	3086	for (i = 1; i < items; ++i)
2632	data->laststatval = PL_laststatval;
2633	data->statcache = PL_statcache;
2634
2635	av_extend (av, AvFILLp (defav) + 1 + 1);
2636
2637	for (i = 0; i <= AvFILLp (defav); ++i)
2638	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));	3087	av_push (av, SvREFCNT_inc_NN (ST (i)));
2639		3088
2640	av_push (av, data_sv);	3089	if ((SV *)hv == &PL_sv_undef)
2641
2642	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2643
2644	api_ready (aTHX_ self);
2645	}
2646
2647	void
2648	_set_state (SV *state)
2649	PROTOTYPE: $
2650	PPCODE:
2651	{
2652	AV *av = (AV *)SvRV (state);
2653	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2654	int i;
2655
2656	errno = data->errorno;
2657	PL_laststype = data->laststype;
2658	PL_laststatval = data->laststatval;
2659	PL_statcache = data->statcache;
2660
2661	EXTEND (SP, AvFILLp (av));
2662	for (i = 0; i < AvFILLp (av); ++i)
2663	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2664	}
2665
2666
2667	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2668
2669	BOOT:
2670	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2671
2672	void
2673	_schedule (...)
2674	CODE:
2675	{
2676	static int incede;
2677
2678	api_cede_notself (aTHX);
2679
2680	++incede;
2681	while (coro_nready >= incede && api_cede (aTHX))
2682	;
2683
2684	sv_setsv (sv_activity, &PL_sv_undef);
2685	if (coro_nready >= incede)
2686	{	3090	{
2687	PUSHMARK (SP);	3091	PUSHMARK (SP);
		3092	EXTEND (SP, 2);
		3093	PUSHs (sv_Coro);
		3094	PUSHs ((SV *)cv_pool_handler);
2688	PUTBACK;	3095	PUTBACK;
2689	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);	3096	call_sv (cv_coro_new, G_SCALAR);
2690	SPAGAIN;	3097	SPAGAIN;
		3098
		3099	hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
2691	}	3100	}
2692		3101
2693	--incede;	3102	{
		3103	struct coro *coro = SvSTATE_hv (hv);
		3104
		3105	assert (!coro->invoke_cb);
		3106	assert (!coro->invoke_av);
		3107	coro->invoke_cb = SvREFCNT_inc (cb);
		3108	coro->invoke_av = av;
		3109	}
		3110
		3111	api_ready ((SV *)hv);
		3112
		3113	if (GIMME_V != G_VOID)
		3114	XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
		3115	else
		3116	SvREFCNT_dec (hv);
2694	}	3117	}
		3118
		3119	SV *
		3120	rouse_cb ()
		3121	PROTOTYPE:
		3122	CODE:
		3123	RETVAL = coro_new_rouse_cb (aTHX);
		3124	OUTPUT:
		3125	RETVAL
		3126
		3127	void
		3128	rouse_wait (...)
		3129	PROTOTYPE: ;$
		3130	PPCODE:
		3131	CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2695		3132
2696		3133
2697	MODULE = Coro::State PACKAGE = PerlIO::cede	3134	MODULE = Coro::State PACKAGE = PerlIO::cede
2698		3135
2699	BOOT:	3136	BOOT:
2700	PerlIO_define_layer (aTHX_ &PerlIO_cede);	3137	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2701		3138
		3139
2702	MODULE = Coro::State PACKAGE = Coro::Semaphore	3140	MODULE = Coro::State PACKAGE = Coro::Semaphore
2703		3141
2704	SV *	3142	SV *
2705	new (SV *klass, SV *count_ = 0)	3143	new (SV *klass, SV *count = 0)
2706	CODE:	3144	CODE:
2707	{	3145	RETVAL = sv_bless (
2708	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */	3146	coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
2709	AV *av = newAV ();	3147	GvSTASH (CvGV (cv))
2710	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));	3148	);
2711	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));	3149	OUTPUT:
2712	}	3150	RETVAL
		3151
		3152	# helper for Coro::Channel
		3153	SV *
		3154	_alloc (int count)
		3155	CODE:
		3156	RETVAL = coro_waitarray_new (aTHX_ count);
2713	OUTPUT:	3157	OUTPUT:
2714	RETVAL	3158	RETVAL
2715		3159
2716	SV *	3160	SV *
2717	count (SV *self)	3161	count (SV *self)
…		…
2726	adjust = 1	3170	adjust = 1
2727	CODE:	3171	CODE:
2728	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);	3172	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2729		3173
2730	void	3174	void
2731	down (SV *self)	3175	down (...)
2732	CODE:	3176	CODE:
2733	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);	3177	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		3178
		3179	void
		3180	wait (...)
		3181	CODE:
		3182	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2734		3183
2735	void	3184	void
2736	try (SV *self)	3185	try (SV *self)
2737	PPCODE:	3186	PPCODE:
2738	{	3187	{
…		…
2750	XSRETURN_NO;	3199	XSRETURN_NO;
2751	}	3200	}
2752		3201
2753	void	3202	void
2754	waiters (SV *self)	3203	waiters (SV *self)
2755	CODE:	3204	PPCODE:
2756	{	3205	{
2757	AV *av = (AV *)SvRV (self);	3206	AV *av = (AV *)SvRV (self);
		3207	int wcount = AvFILLp (av) + 1 - 1;
2758		3208
2759	if (GIMME_V == G_SCALAR)	3209	if (GIMME_V == G_SCALAR)
2760	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));	3210	XPUSHs (sv_2mortal (newSViv (wcount)));
2761	else	3211	else
2762	{	3212	{
2763	int i;	3213	int i;
2764	EXTEND (SP, AvFILLp (av) + 1 - 1);	3214	EXTEND (SP, wcount);
2765	for (i = 1; i <= AvFILLp (av); ++i)	3215	for (i = 1; i <= wcount; ++i)
2766	PUSHs (newSVsv (AvARRAY (av)[i]));	3216	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2767	}	3217	}
2768	}	3218	}
2769		3219
		3220	MODULE = Coro::State PACKAGE = Coro::Signal
		3221
		3222	SV *
		3223	new (SV *klass)
		3224	CODE:
		3225	RETVAL = sv_bless (
		3226	coro_waitarray_new (aTHX_ 0),
		3227	GvSTASH (CvGV (cv))
		3228	);
		3229	OUTPUT:
		3230	RETVAL
		3231
		3232	void
		3233	wait (...)
		3234	CODE:
		3235	CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
		3236
		3237	void
		3238	broadcast (SV *self)
		3239	CODE:
		3240	{
		3241	AV *av = (AV *)SvRV (self);
		3242	coro_signal_wake (aTHX_ av, AvFILLp (av));
		3243	}
		3244
		3245	void
		3246	send (SV *self)
		3247	CODE:
		3248	{
		3249	AV *av = (AV *)SvRV (self);
		3250
		3251	if (AvFILLp (av))
		3252	coro_signal_wake (aTHX_ av, 1);
		3253	else
		3254	SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
		3255	}
		3256
		3257	IV
		3258	awaited (SV *self)
		3259	CODE:
		3260	RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
		3261	OUTPUT:
		3262	RETVAL
		3263
		3264
		3265	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		3266
		3267	BOOT:
		3268	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		3269
		3270	void
		3271	_schedule (...)
		3272	CODE:
		3273	{
		3274	static int incede;
		3275
		3276	api_cede_notself (aTHX);
		3277
		3278	++incede;
		3279	while (coro_nready >= incede && api_cede (aTHX))
		3280	;
		3281
		3282	sv_setsv (sv_activity, &PL_sv_undef);
		3283	if (coro_nready >= incede)
		3284	{
		3285	PUSHMARK (SP);
		3286	PUTBACK;
		3287	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		3288	}
		3289
		3290	--incede;
		3291	}
		3292
		3293
		3294	MODULE = Coro::State PACKAGE = Coro::AIO
		3295
		3296	void
		3297	_register (char *target, char *proto, SV *req)
		3298	CODE:
		3299	{
		3300	CV *req_cv = coro_sv_2cv (aTHX_ req);
		3301	/* newXSproto doesn't return the CV on 5.8 */
		3302	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		3303	sv_setpv ((SV *)slf_cv, proto);
		3304	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		3305	}
		3306

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