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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.278 by root, Sun Nov 16 07:09:28 2008 UTC vs.
Revision 1.306 by root, Wed Nov 19 11:11:10 2008 UTC

…		…
16		16
17	#ifdef WIN32	17	#ifdef WIN32
18	# undef setjmp	18	# undef setjmp
19	# undef longjmp	19	# undef longjmp
20	# undef _exit	20	# undef _exit
21	# define setjmp _setjmp // deep magic, don't ask	21	# define setjmp _setjmp /* deep magic */
22	#else	22	#else
23	# include <inttypes.h> /* most portable stdint.h */	23	# include <inttypes.h> /* most portable stdint.h */
24	#endif	24	#endif
25		25
26	#ifdef HAVE_MMAP	26	#ifdef HAVE_MMAP
…		…
95	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
96	#endif	96	#endif
97	#ifndef newSV	97	#ifndef newSV
98	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
99	#endif	99	#endif
		100	#ifndef CvISXSUB_on
		101	# define CvISXSUB_on(cv) (void)cv
		102	#endif
100		103
101	/* 5.8.7 */	104	/* 5.8.7 */
102	#ifndef SvRV_set	105	#ifndef SvRV_set
103	# define SvRV_set(s,v) SvRV(s) = (v)	106	# define SvRV_set(s,v) SvRV(s) = (v)
104	#endif	107	#endif
…		…
117	#endif	120	#endif
118		121
119	/* The next macros try to return the current stack pointer, in an as	122	/* The next macros try to return the current stack pointer, in an as
120	* portable way as possible. */	123	* portable way as possible. */
121	#if __GNUC__ >= 4	124	#if __GNUC__ >= 4
		125	# define dSTACKLEVEL int stacklevel_dummy
122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)	126	# define STACKLEVEL __builtin_frame_address (0)
123	#else	127	#else
124	# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel	128	# define dSTACKLEVEL volatile void *stacklevel
		129	# define STACKLEVEL ((void *)&stacklevel)
125	#endif	130	#endif
126		131
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	132	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		133
129	#if __GNUC__ >= 3	134	#if __GNUC__ >= 3
…		…
140	#define expect_true(expr) expect ((expr) != 0, 1)	145	#define expect_true(expr) expect ((expr) != 0, 1)
141		146
142	#define NOINLINE attribute ((noinline))	147	#define NOINLINE attribute ((noinline))
143		148
144	#include "CoroAPI.h"	149	#include "CoroAPI.h"
		150	#define GCoroAPI (&coroapi) /* very sneaky */
145		151
146	#ifdef USE_ITHREADS	152	#ifdef USE_ITHREADS
147
148	static perl_mutex coro_lock;
149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151	# if CORO_PTHREAD	153	# if CORO_PTHREAD
152	static void *coro_thx;	154	static void *coro_thx;
153	# endif	155	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	156	#endif
161
162	# undef LOCK
163	# define LOCK (void)0
164	# undef UNLOCK
165	# define UNLOCK (void)0
166
167	/* helper storage struct for Coro::AIO */
168	struct io_state
169	{
170	AV *res;
171	int errorno;
172	I32 laststype; /* U16 in 5.10.0 */
173	int laststatval;
174	Stat_t statcache;
175	};
176		157
177	static double (*nvtime)(); /* so why doesn't it take void? */	158	static double (*nvtime)(); /* so why doesn't it take void? */
		159
		160	/* we hijack an hopefully unused CV flag for our purposes */
		161	#define CVf_SLF 0x4000
		162	static OP *pp_slf (pTHX);
178		163
179	static U32 cctx_gen;	164	static U32 cctx_gen;
180	static size_t cctx_stacksize = CORO_STACKSIZE;	165	static size_t cctx_stacksize = CORO_STACKSIZE;
181	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
182	static AV *main_mainstack; /* used to differentiate between $main and others */	167	static AV *main_mainstack; /* used to differentiate between $main and others */
183	static JMPENV *main_top_env;	168	static JMPENV *main_top_env;
184	static HV *coro_state_stash, *coro_stash;	169	static HV *coro_state_stash, *coro_stash;
185	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */	170	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186	static volatile struct coro *transfer_next;
187		171
188	static GV *irsgv; /* $/ */	172	static GV *irsgv; /* $/ */
189	static GV *stdoutgv; /* *STDOUT */	173	static GV *stdoutgv; /* *STDOUT */
190	static SV *rv_diehook;	174	static SV *rv_diehook;
191	static SV *rv_warnhook;	175	static SV *rv_warnhook;
…		…
257	/* this is a structure representing a perl-level coroutine */	241	/* this is a structure representing a perl-level coroutine */
258	struct coro {	242	struct coro {
259	/* the C coroutine allocated to this perl coroutine, if any */	243	/* the C coroutine allocated to this perl coroutine, if any */
260	coro_cctx *cctx;	244	coro_cctx *cctx;
261		245
262	/* process data */	246	/* state data */
263	struct CoroSLF slf_frame; /* saved slf frame */	247	struct CoroSLF slf_frame; /* saved slf frame */
264	AV *mainstack;	248	AV *mainstack;
265	perl_slots *slot; /* basically the saved sp */	249	perl_slots *slot; /* basically the saved sp */
266		250
267	AV *args; /* data associated with this coroutine (initial args) */	251	AV *args; /* data associated with this coroutine (initial args) */
268	int refcnt; /* coroutines are refcounted, yes */	252	int refcnt; /* coroutines are refcounted, yes */
269	int flags; /* CF_ flags */	253	int flags; /* CF_ flags */
270	HV *hv; /* the perl hash associated with this coro, if any */	254	HV *hv; /* the perl hash associated with this coro, if any */
		255	void (*on_destroy)(pTHX_ struct coro *coro);
271		256
272	/* statistics */	257	/* statistics */
273	int usecount; /* number of transfers to this coro */	258	int usecount; /* number of transfers to this coro */
274		259
275	/* coro process data */	260	/* coro process data */
276	int prio;	261	int prio;
277	SV *throw; /* exception to be thrown */	262	SV *except; /* exception to be thrown */
		263	SV *rouse_cb;
278		264
279	/* async_pool */	265	/* async_pool */
280	SV *saved_deffh;	266	SV *saved_deffh;
281		267
282	/* linked list */	268	/* linked list */
…		…
284	};	270	};
285		271
286	typedef struct coro *Coro__State;	272	typedef struct coro *Coro__State;
287	typedef struct coro *Coro__State_or_hashref;	273	typedef struct coro *Coro__State_or_hashref;
288		274
		275	/* the following variables are effectively part of the perl context */
		276	/* and get copied between struct coro and these variables */
		277	/* the mainr easonw e don't support windows process emulation */
289	static struct CoroSLF slf_frame; /* the current slf frame */	278	static struct CoroSLF slf_frame; /* the current slf frame */
290		279
291	/** Coro ********************************************************************/	280	/** Coro ********************************************************************/
292		281
293	#define PRIO_MAX 3	282	#define PRIO_MAX 3
…		…
395	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	384	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396		385
397	return 0;	386	return 0;
398	}	387	}
399		388
400	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	389	#define CORO_MAGIC_type_cv 26
401	#define CORO_MAGIC_type_state PERL_MAGIC_ext	390	#define CORO_MAGIC_type_state PERL_MAGIC_ext
402		391
403	static MGVTBL coro_cv_vtbl = {	392	static MGVTBL coro_cv_vtbl = {
404	0, 0, 0, 0,	393	0, 0, 0, 0,
405	coro_cv_free	394	coro_cv_free
406	};	395	};
407		396
		397	#define CORO_MAGIC_NN(sv, type) \
		398	(expect_true (SvMAGIC (sv)->mg_type == type) \
		399	? SvMAGIC (sv) \
		400	: mg_find (sv, type))
		401
408	#define CORO_MAGIC(sv, type) \	402	#define CORO_MAGIC(sv, type) \
409	SvMAGIC (sv) \	403	(expect_true (SvMAGIC (sv)) \
410	? SvMAGIC (sv)->mg_type == type \	404	? CORO_MAGIC_NN (sv, type) \
411	? SvMAGIC (sv) \
412	: mg_find (sv, type) \
413	: 0	405	: 0)
414		406
415	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	407	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	408	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
417		409
418	INLINE struct coro *	410	INLINE struct coro *
419	SvSTATE_ (pTHX_ SV *coro)	411	SvSTATE_ (pTHX_ SV *coro)
420	{	412	{
421	HV *stash;	413	HV *stash;
…		…
438	mg = CORO_MAGIC_state (coro);	430	mg = CORO_MAGIC_state (coro);
439	return (struct coro *)mg->mg_ptr;	431	return (struct coro *)mg->mg_ptr;
440	}	432	}
441		433
442	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	434	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		435
		436	/* faster than SvSTATE, but expects a coroutine hv */
		437	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		438	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443		439
444	/* the next two functions merely cache the padlists */	440	/* the next two functions merely cache the padlists */
445	static void	441	static void
446	get_padlist (pTHX_ CV *cv)	442	get_padlist (pTHX_ CV *cv)
447	{	443	{
…		…
453	else	449	else
454	{	450	{
455	#if CORO_PREFER_PERL_FUNCTIONS	451	#if CORO_PREFER_PERL_FUNCTIONS
456	/* this is probably cleaner? but also slower! */	452	/* this is probably cleaner? but also slower! */
457	/* in practise, it seems to be less stable */	453	/* in practise, it seems to be less stable */
458	CV *cp = Perl_cv_clone (cv);	454	CV *cp = Perl_cv_clone (aTHX_ cv);
459	CvPADLIST (cv) = CvPADLIST (cp);	455	CvPADLIST (cv) = CvPADLIST (cp);
460	CvPADLIST (cp) = 0;	456	CvPADLIST (cp) = 0;
461	SvREFCNT_dec (cp);	457	SvREFCNT_dec (cp);
462	#else	458	#else
463	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	459	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
515	}	511	}
516		512
517	PUTBACK;	513	PUTBACK;
518	}	514	}
519		515
520	slf_frame = c->slf_frame;	516	slf_frame = c->slf_frame;
		517	CORO_THROW = c->except;
521	}	518	}
522		519
523	static void	520	static void
524	save_perl (pTHX_ Coro__State c)	521	save_perl (pTHX_ Coro__State c)
525	{	522	{
		523	c->except = CORO_THROW;
526	c->slf_frame = slf_frame;	524	c->slf_frame = slf_frame;
527		525
528	{	526	{
529	dSP;	527	dSP;
530	I32 cxix = cxstack_ix;	528	I32 cxix = cxstack_ix;
…		…
605	* of perl.c:init_stacks, except that it uses less memory	603	* of perl.c:init_stacks, except that it uses less memory
606	* on the (sometimes correct) assumption that coroutines do	604	* on the (sometimes correct) assumption that coroutines do
607	* not usually need a lot of stackspace.	605	* not usually need a lot of stackspace.
608	*/	606	*/
609	#if CORO_PREFER_PERL_FUNCTIONS	607	#if CORO_PREFER_PERL_FUNCTIONS
610	# define coro_init_stacks init_stacks	608	# define coro_init_stacks(thx) init_stacks ()
611	#else	609	#else
612	static void	610	static void
613	coro_init_stacks (pTHX)	611	coro_init_stacks (pTHX)
614	{	612	{
615	PL_curstackinfo = new_stackinfo(32, 8);	613	PL_curstackinfo = new_stackinfo(32, 8);
…		…
823	slf_check_nop (pTHX_ struct CoroSLF *frame)	821	slf_check_nop (pTHX_ struct CoroSLF *frame)
824	{	822	{
825	return 0;	823	return 0;
826	}	824	}
827		825
828	static void	826	static UNOP coro_setup_op;
		827
		828	static void NOINLINE /* noinline to keep it out of the transfer fast path */
829	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
830	{	830	{
831	/*	831	/*
832	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
833	*/	833	*/
…		…
860	{	860	{
861	dSP;	861	dSP;
862	UNOP myop;	862	UNOP myop;
863		863
864	Zero (&myop, 1, UNOP);	864	Zero (&myop, 1, UNOP);
865	myop.op_next = Nullop;	865	myop.op_next = Nullop;
866	myop.op_flags = OPf_WANT_VOID;	866	myop.op_flags = OPf_WANT_VOID;
867		867
868	PUSHMARK (SP);	868	PUSHMARK (SP);
869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870	PUTBACK;	870	PUTBACK;
…		…
876	/* this newly created coroutine might be run on an existing cctx which most	876	/* this newly created coroutine might be run on an existing cctx which most
877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.	877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878	*/	878	*/
879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */	879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */	880	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		881
		882	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		883	coro_setup_op.op_next = PL_op;
		884	coro_setup_op.op_type = OP_CUSTOM;
		885	coro_setup_op.op_ppaddr = pp_slf;
		886	/* no flags required, as an init function won't be called */
		887
		888	PL_op = (OP *)&coro_setup_op;
		889
		890	/* copy throw, in case it was set before coro_setup */
		891	CORO_THROW = coro->except;
881	}	892	}
882		893
883	static void	894	static void
884	coro_destruct (pTHX_ struct coro *coro)	895	coro_destruct (pTHX_ struct coro *coro)
885	{	896	{
…		…
908	SvREFCNT_dec (GvSV (irsgv));	919	SvREFCNT_dec (GvSV (irsgv));
909		920
910	SvREFCNT_dec (PL_diehook);	921	SvREFCNT_dec (PL_diehook);
911	SvREFCNT_dec (PL_warnhook);	922	SvREFCNT_dec (PL_warnhook);
912		923
		924	SvREFCNT_dec (CORO_THROW);
913	SvREFCNT_dec (coro->saved_deffh);	925	SvREFCNT_dec (coro->saved_deffh);
914	SvREFCNT_dec (coro->throw);	926	SvREFCNT_dec (coro->rouse_cb);
915		927
916	coro_destruct_stacks (aTHX);	928	coro_destruct_stacks (aTHX);
917	}	929	}
918		930
919	INLINE void	931	INLINE void
…		…
929	static int	941	static int
930	runops_trace (pTHX)	942	runops_trace (pTHX)
931	{	943	{
932	COP *oldcop = 0;	944	COP *oldcop = 0;
933	int oldcxix = -2;	945	int oldcxix = -2;
934	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	946	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
935	coro_cctx *cctx = coro->cctx;	947	coro_cctx *cctx = coro->cctx;
936		948
937	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	949	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938	{	950	{
939	PERL_ASYNC_CHECK ();	951	PERL_ASYNC_CHECK ();
…		…
1048		1060
1049	TAINT_NOT;	1061	TAINT_NOT;
1050	return 0;	1062	return 0;
1051	}	1063	}
1052		1064
		1065	static struct coro_cctx *cctx_ssl_cctx;
		1066	static struct CoroSLF cctx_ssl_frame;
		1067
1053	static void	1068	static void
1054	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)	1069	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1055	{	1070	{
1056	ta->prev = (struct coro *)cctx;	1071	ta->prev = (struct coro *)cctx_ssl_cctx;
1057	ta->next = 0;	1072	ta->next = 0;
1058	}	1073	}
1059		1074
1060	/* inject a fake call to Coro::State::_cctx_init into the execution */	1075	static int
1061	/* _cctx_init should be careful, as it could be called at almost any time */	1076	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1062	/* during execution of a perl program */	1077	{
1063	/* also initialises PL_top_env */	1078	*frame = cctx_ssl_frame;
		1079
		1080	return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
		1081	}
		1082
		1083	/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1064	static void NOINLINE	1084	static void NOINLINE
1065	cctx_prepare (pTHX_ coro_cctx *cctx)	1085	cctx_prepare (pTHX_ coro_cctx *cctx)
1066	{	1086	{
1067	dSP;
1068	UNOP myop;
1069
1070	PL_top_env = &PL_start_env;	1087	PL_top_env = &PL_start_env;
1071		1088
1072	if (cctx->flags & CC_TRACE)	1089	if (cctx->flags & CC_TRACE)
1073	PL_runops = runops_trace;	1090	PL_runops = runops_trace;
1074		1091
1075	Zero (&myop, 1, UNOP);	1092	/* we already must be executing an SLF op, there is no other valid way
1076	myop.op_next = PL_op;	1093	* that can lead to creation of a new cctx */
1077	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1094	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1095	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1078		1096
1079	PUSHMARK (SP);	1097	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1080	EXTEND (SP, 2);	1098	cctx_ssl_cctx = cctx;
1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));	1099	cctx_ssl_frame = slf_frame;
1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1100
1083	PUTBACK;	1101	slf_frame.prepare = slf_prepare_set_stacklevel;
1084	PL_op = (OP *)&myop;	1102	slf_frame.check = slf_check_set_stacklevel;
1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1086	SPAGAIN;
1087	}	1103	}
1088		1104
1089	/* the tail of transfer: execute stuff we can only do after a transfer */	1105	/* the tail of transfer: execute stuff we can only do after a transfer */
1090	INLINE void	1106	INLINE void
1091	transfer_tail (pTHX)	1107	transfer_tail (pTHX)
1092	{	1108	{
1093	struct coro *next = (struct coro *)transfer_next;
1094	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1096
1097	free_coro_mortal (aTHX);	1109	free_coro_mortal (aTHX);
1098	UNLOCK;
1099
1100	if (expect_false (next->throw))
1101	{
1102	SV *exception = sv_2mortal (next->throw);
1103
1104	next->throw = 0;
1105	sv_setsv (ERRSV, exception);
1106	croak (0);
1107	}
1108	}	1110	}
1109		1111
1110	/*	1112	/*
1111	* this is a _very_ stripped down perl interpreter ;)	1113	* this is a _very_ stripped down perl interpreter ;)
1112	*/	1114	*/
…		…
1127		1129
1128	/* inject a fake subroutine call to cctx_init */	1130	/* inject a fake subroutine call to cctx_init */
1129	cctx_prepare (aTHX_ (coro_cctx *)arg);	1131	cctx_prepare (aTHX_ (coro_cctx *)arg);
1130		1132
1131	/* cctx_run is the alternative tail of transfer() */	1133	/* cctx_run is the alternative tail of transfer() */
1132	/* TODO: throwing an exception here might be deadly, VERIFY */
1133	transfer_tail (aTHX);	1134	transfer_tail (aTHX);
1134		1135
1135	/* somebody or something will hit me for both perl_run and PL_restartop */	1136	/* somebody or something will hit me for both perl_run and PL_restartop */
1136	PL_restartop = PL_op;	1137	PL_restartop = PL_op;
1137	perl_run (PL_curinterp);	1138	perl_run (PL_curinterp);
…		…
1293	/** coroutine switching *****************************************************/	1294	/** coroutine switching *****************************************************/
1294		1295
1295	static void	1296	static void
1296	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1297	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297	{	1298	{
		1299	/* TODO: throwing up here is considered harmful */
		1300
1298	if (expect_true (prev != next))	1301	if (expect_true (prev != next))
1299	{	1302	{
1300	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1303	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");	1304	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302		1305
…		…
1312	#endif	1315	#endif
1313	}	1316	}
1314	}	1317	}
1315		1318
1316	/* always use the TRANSFER macro */	1319	/* always use the TRANSFER macro */
1317	static void NOINLINE	1320	static void NOINLINE /* noinline so we have a fixed stackframe */
1318	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1321	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319	{	1322	{
1320	dSTACKLEVEL;	1323	dSTACKLEVEL;
1321		1324
1322	/* sometimes transfer is only called to set idle_sp */	1325	/* sometimes transfer is only called to set idle_sp */
1323	if (expect_false (!next))	1326	if (expect_false (!next))
1324	{	1327	{
1325	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;	1328	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1326	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1329	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327	}	1330	}
1328	else if (expect_true (prev != next))	1331	else if (expect_true (prev != next))
1329	{	1332	{
1330	coro_cctx *prev__cctx;	1333	coro_cctx *prev__cctx;
…		…
1337	prev->flags |= CF_RUNNING;	1340	prev->flags |= CF_RUNNING;
1338	}	1341	}
1339		1342
1340	prev->flags &= ~CF_RUNNING;	1343	prev->flags &= ~CF_RUNNING;
1341	next->flags |= CF_RUNNING;	1344	next->flags |= CF_RUNNING;
1342
1343	LOCK;
1344		1345
1345	/* first get rid of the old state */	1346	/* first get rid of the old state */
1346	save_perl (aTHX_ prev);	1347	save_perl (aTHX_ prev);
1347		1348
1348	if (expect_false (next->flags & CF_NEW))	1349	if (expect_false (next->flags & CF_NEW))
…		…
1357		1358
1358	prev__cctx = prev->cctx;	1359	prev__cctx = prev->cctx;
1359		1360
1360	/* possibly untie and reuse the cctx */	1361	/* possibly untie and reuse the cctx */
1361	if (expect_true (	1362	if (expect_true (
1362	prev__cctx->idle_sp == (void *)stacklevel	1363	prev__cctx->idle_sp == STACKLEVEL
1363	&& !(prev__cctx->flags & CC_TRACE)	1364	&& !(prev__cctx->flags & CC_TRACE)
1364	&& !force_cctx	1365	&& !force_cctx
1365	))	1366	))
1366	{	1367	{
1367	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */	1368	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
…		…
1381	++next->usecount;	1382	++next->usecount;
1382		1383
1383	if (expect_true (!next->cctx))	1384	if (expect_true (!next->cctx))
1384	next->cctx = cctx_get (aTHX);	1385	next->cctx = cctx_get (aTHX);
1385		1386
1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387	transfer_next = next;
1388
1389	if (expect_false (prev__cctx != next->cctx))	1387	if (expect_false (prev__cctx != next->cctx))
1390	{	1388	{
1391	prev__cctx->top_env = PL_top_env;	1389	prev__cctx->top_env = PL_top_env;
1392	PL_top_env = next->cctx->top_env;	1390	PL_top_env = next->cctx->top_env;
1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1391	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
…		…
1406	coro_state_destroy (pTHX_ struct coro *coro)	1404	coro_state_destroy (pTHX_ struct coro *coro)
1407	{	1405	{
1408	if (coro->flags & CF_DESTROYED)	1406	if (coro->flags & CF_DESTROYED)
1409	return 0;	1407	return 0;
1410		1408
		1409	if (coro->on_destroy)
		1410	coro->on_destroy (aTHX_ coro);
		1411
1411	coro->flags |= CF_DESTROYED;	1412	coro->flags |= CF_DESTROYED;
1412		1413
1413	if (coro->flags & CF_READY)	1414	if (coro->flags & CF_READY)
1414	{	1415	{
1415	/* reduce nready, as destroying a ready coro effectively unreadies it */	1416	/* reduce nready, as destroying a ready coro effectively unreadies it */
1416	/* alternative: look through all ready queues and remove the coro */	1417	/* alternative: look through all ready queues and remove the coro */
1417	LOCK;
1418	--coro_nready;	1418	--coro_nready;
1419	UNLOCK;
1420	}	1419	}
1421	else	1420	else
1422	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1421	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423		1422
1424	if (coro->mainstack && coro->mainstack != main_mainstack)	1423	if (coro->mainstack && coro->mainstack != main_mainstack)
…		…
1500		1499
1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1500	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1502	TRANSFER (ta, 1);	1501	TRANSFER (ta, 1);
1503	}	1502	}
1504		1503
		1504	/*****************************************************************************/
		1505	/* gensub: simple closure generation utility */
		1506
		1507	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		1508
		1509	/* create a closure from XS, returns a code reference */
		1510	/* the arg can be accessed via GENSUB_ARG from the callback */
		1511	/* the callback must use dXSARGS/XSRETURN */
		1512	static SV *
		1513	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		1514	{
		1515	CV *cv = (CV *)newSV (0);
		1516
		1517	sv_upgrade ((SV *)cv, SVt_PVCV);
		1518
		1519	CvANON_on (cv);
		1520	CvISXSUB_on (cv);
		1521	CvXSUB (cv) = xsub;
		1522	GENSUB_ARG = arg;
		1523
		1524	return newRV_noinc ((SV *)cv);
		1525	}
		1526
1505	/** Coro ********************************************************************/	1527	/** Coro ********************************************************************/
1506		1528
1507	static void	1529	INLINE void
1508	coro_enq (pTHX_ SV *coro_sv)	1530	coro_enq (pTHX_ struct coro *coro)
1509	{	1531	{
1510	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1532	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1511	}	1533	}
1512		1534
1513	static SV *	1535	INLINE SV *
1514	coro_deq (pTHX)	1536	coro_deq (pTHX)
1515	{	1537	{
1516	int prio;	1538	int prio;
1517		1539
1518	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1540	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1537	if (coro->flags & CF_READY)	1559	if (coro->flags & CF_READY)
1538	return 0;	1560	return 0;
1539		1561
1540	coro->flags |= CF_READY;	1562	coro->flags |= CF_READY;
1541		1563
1542	LOCK;
1543
1544	sv_hook = coro_nready ? 0 : coro_readyhook;	1564	sv_hook = coro_nready ? 0 : coro_readyhook;
1545	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1565	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546		1566
1547	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1567	coro_enq (aTHX_ coro);
1548	++coro_nready;	1568	++coro_nready;
1549		1569
1550	UNLOCK;
1551
1552	if (sv_hook)	1570	if (sv_hook)
1553	{	1571	{
1554	dSP;	1572	dSP;
1555		1573
1556	ENTER;	1574	ENTER;
1557	SAVETMPS;	1575	SAVETMPS;
1558		1576
1559	PUSHMARK (SP);	1577	PUSHMARK (SP);
1560	PUTBACK;	1578	PUTBACK;
1561	call_sv (sv_hook, G_DISCARD);	1579	call_sv (sv_hook, G_VOID | G_DISCARD);
1562	SPAGAIN;
1563		1580
1564	FREETMPS;	1581	FREETMPS;
1565	LEAVE;	1582	LEAVE;
1566	}	1583	}
1567		1584
…		…
1582	{	1599	{
1583	SV *prev_sv, *next_sv;	1600	SV *prev_sv, *next_sv;
1584		1601
1585	for (;;)	1602	for (;;)
1586	{	1603	{
1587	LOCK;
1588	next_sv = coro_deq (aTHX);	1604	next_sv = coro_deq (aTHX);
1589		1605
1590	/* nothing to schedule: call the idle handler */	1606	/* nothing to schedule: call the idle handler */
1591	if (expect_false (!next_sv))	1607	if (expect_false (!next_sv))
1592	{	1608	{
1593	dSP;	1609	dSP;
1594	UNLOCK;
1595		1610
1596	ENTER;	1611	ENTER;
1597	SAVETMPS;	1612	SAVETMPS;
1598		1613
1599	PUSHMARK (SP);	1614	PUSHMARK (SP);
1600	PUTBACK;	1615	PUTBACK;
1601	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1616	call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1602	SPAGAIN;
1603		1617
1604	FREETMPS;	1618	FREETMPS;
1605	LEAVE;	1619	LEAVE;
1606	continue;	1620	continue;
1607	}	1621	}
1608		1622
1609	ta->next = SvSTATE (next_sv);	1623	ta->next = SvSTATE_hv (next_sv);
1610		1624
1611	/* cannot transfer to destroyed coros, skip and look for next */	1625	/* cannot transfer to destroyed coros, skip and look for next */
1612	if (expect_false (ta->next->flags & CF_DESTROYED))	1626	if (expect_false (ta->next->flags & CF_DESTROYED))
1613	{	1627	{
1614	UNLOCK;
1615	SvREFCNT_dec (next_sv);	1628	SvREFCNT_dec (next_sv);
1616	/* coro_nready has already been taken care of by destroy */	1629	/* coro_nready has already been taken care of by destroy */
1617	continue;	1630	continue;
1618	}	1631	}
1619		1632
1620	--coro_nready;	1633	--coro_nready;
1621	UNLOCK;
1622	break;	1634	break;
1623	}	1635	}
1624		1636
1625	/* free this only after the transfer */	1637	/* free this only after the transfer */
1626	prev_sv = SvRV (coro_current);	1638	prev_sv = SvRV (coro_current);
1627	ta->prev = SvSTATE (prev_sv);	1639	ta->prev = SvSTATE_hv (prev_sv);
1628	TRANSFER_CHECK (*ta);	1640	TRANSFER_CHECK (*ta);
1629	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1641	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630	ta->next->flags &= ~CF_READY;	1642	ta->next->flags &= ~CF_READY;
1631	SvRV_set (coro_current, next_sv);	1643	SvRV_set (coro_current, next_sv);
1632		1644
1633	LOCK;
1634	free_coro_mortal (aTHX);	1645	free_coro_mortal (aTHX);
1635	coro_mortal = prev_sv;	1646	coro_mortal = prev_sv;
1636	UNLOCK;
1637	}	1647	}
1638		1648
1639	INLINE void	1649	INLINE void
1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)	1650	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641	{	1651	{
…		…
1718	if (coro->flags & CF_RUNNING)	1728	if (coro->flags & CF_RUNNING)
1719	PL_runops = RUNOPS_DEFAULT;	1729	PL_runops = RUNOPS_DEFAULT;
1720	else	1730	else
1721	coro->slot->runops = RUNOPS_DEFAULT;	1731	coro->slot->runops = RUNOPS_DEFAULT;
1722	}	1732	}
		1733	}
		1734
		1735	/*****************************************************************************/
		1736	/* rouse callback */
		1737
		1738	#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
		1739
		1740	static void
		1741	coro_rouse_callback (pTHX_ CV *cv)
		1742	{
		1743	dXSARGS;
		1744	SV *data = (SV *)GENSUB_ARG;
		1745
		1746	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1747	{
		1748	/* first call, set args */
		1749	int i;
		1750	AV *av = newAV ();
		1751	SV *coro = SvRV (data);
		1752
		1753	SvRV_set (data, (SV *)av);
		1754	api_ready (aTHX_ coro);
		1755	SvREFCNT_dec (coro);
		1756
		1757	/* better take a full copy of the arguments */
		1758	while (items--)
		1759	av_store (av, items, newSVsv (ST (items)));
		1760	}
		1761
		1762	XSRETURN_EMPTY;
		1763	}
		1764
		1765	static int
		1766	slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
		1767	{
		1768	SV *data = (SV *)frame->data;
		1769
		1770	if (CORO_THROW)
		1771	return 0;
		1772
		1773	if (SvTYPE (SvRV (data)) != SVt_PVAV)
		1774	return 1;
		1775
		1776	/* now push all results on the stack */
		1777	{
		1778	dSP;
		1779	AV *av = (AV *)SvRV (data);
		1780	int i;
		1781
		1782	EXTEND (SP, AvFILLp (av) + 1);
		1783	for (i = 0; i <= AvFILLp (av); ++i)
		1784	PUSHs (sv_2mortal (AvARRAY (av)[i]));
		1785
		1786	/* we have stolen the elements, so ste length to zero and free */
		1787	AvFILLp (av) = -1;
		1788	av_undef (av);
		1789
		1790	PUTBACK;
		1791	}
		1792
		1793	return 0;
		1794	}
		1795
		1796	static void
		1797	slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1798	{
		1799	SV *cb;
		1800
		1801	if (items)
		1802	cb = arg [0];
		1803	else
		1804	{
		1805	struct coro *coro = SvSTATE_current;
		1806
		1807	if (!coro->rouse_cb)
		1808	croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
		1809
		1810	cb = sv_2mortal (coro->rouse_cb);
		1811	coro->rouse_cb = 0;
		1812	}
		1813
		1814	if (!SvROK (cb)
		1815	|| SvTYPE (SvRV (cb)) != SVt_PVCV
		1816	|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
		1817	croak ("Coro::rouse_wait called with illegal callback argument,");
		1818
		1819	{
		1820	CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
		1821	SV *data = (SV *)GENSUB_ARG;
		1822
		1823	frame->data = (void *)data;
		1824	frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
		1825	frame->check = slf_check_rouse_wait;
		1826	}
		1827	}
		1828
		1829	static SV *
		1830	coro_new_rouse_cb (pTHX)
		1831	{
		1832	HV *hv = (HV *)SvRV (coro_current);
		1833	struct coro *coro = SvSTATE_hv (hv);
		1834	SV *data = newRV_inc ((SV *)hv);
		1835	SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
		1836
		1837	sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
		1838	SvREFCNT_dec (data); /* magicext increases the refcount */
		1839
		1840	SvREFCNT_dec (coro->rouse_cb);
		1841	coro->rouse_cb = SvREFCNT_inc_NN (cb);
		1842
		1843	return cb;
		1844	}
		1845
		1846	/*****************************************************************************/
		1847	/* schedule-like-function opcode (SLF) */
		1848
		1849	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1850	static const CV *slf_cv;
		1851	static SV **slf_argv;
		1852	static int slf_argc, slf_arga; /* count, allocated */
		1853	static I32 slf_ax; /* top of stack, for restore */
		1854
		1855	/* this restores the stack in the case we patched the entersub, to */
		1856	/* recreate the stack frame as perl will on following calls */
		1857	/* since entersub cleared the stack */
		1858	static OP *
		1859	pp_restore (pTHX)
		1860	{
		1861	int i;
		1862	SV **SP = PL_stack_base + slf_ax;
		1863
		1864	PUSHMARK (SP);
		1865
		1866	EXTEND (SP, slf_argc + 1);
		1867
		1868	for (i = 0; i < slf_argc; ++i)
		1869	PUSHs (sv_2mortal (slf_argv [i]));
		1870
		1871	PUSHs ((SV *)CvGV (slf_cv));
		1872
		1873	RETURNOP (slf_restore.op_first);
		1874	}
		1875
		1876	static void
		1877	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1878	{
		1879	SV **arg = (SV **)slf_frame.data;
		1880
		1881	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1882	}
		1883
		1884	static void
		1885	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1886	{
		1887	if (items != 2)
		1888	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1889
		1890	frame->prepare = slf_prepare_transfer;
		1891	frame->check = slf_check_nop;
		1892	frame->data = (void *)arg; /* let's hope it will stay valid */
		1893	}
		1894
		1895	static void
		1896	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1897	{
		1898	frame->prepare = prepare_schedule;
		1899	frame->check = slf_check_nop;
		1900	}
		1901
		1902	static void
		1903	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1904	{
		1905	frame->prepare = prepare_cede;
		1906	frame->check = slf_check_nop;
		1907	}
		1908
		1909	static void
		1910	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1911	{
		1912	frame->prepare = prepare_cede_notself;
		1913	frame->check = slf_check_nop;
		1914	}
		1915
		1916	/*
		1917	* these not obviously related functions are all rolled into one
		1918	* function to increase chances that they all will call transfer with the same
		1919	* stack offset
		1920	* SLF stands for "schedule-like-function".
		1921	*/
		1922	static OP *
		1923	pp_slf (pTHX)
		1924	{
		1925	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1926
		1927	/* set up the slf frame, unless it has already been set-up */
		1928	/* the latter happens when a new coro has been started */
		1929	/* or when a new cctx was attached to an existing coroutine */
		1930	if (expect_true (!slf_frame.prepare))
		1931	{
		1932	/* first iteration */
		1933	dSP;
		1934	SV **arg = PL_stack_base + TOPMARK + 1;
		1935	int items = SP - arg; /* args without function object */
		1936	SV *gv = *sp;
		1937
		1938	/* do a quick consistency check on the "function" object, and if it isn't */
		1939	/* for us, divert to the real entersub */
		1940	if (SvTYPE (gv) != SVt_PVGV
		1941	|| !GvCV (gv)
		1942	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1943	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1944
		1945	if (!(PL_op->op_flags & OPf_STACKED))
		1946	{
		1947	/* ampersand-form of call, use @_ instead of stack */
		1948	AV *av = GvAV (PL_defgv);
		1949	arg = AvARRAY (av);
		1950	items = AvFILLp (av) + 1;
		1951	}
		1952
		1953	/* now call the init function, which needs to set up slf_frame */
		1954	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1955	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1956
		1957	/* pop args */
		1958	SP = PL_stack_base + POPMARK;
		1959
		1960	PUTBACK;
		1961	}
		1962
		1963	/* now that we have a slf_frame, interpret it! */
		1964	/* we use a callback system not to make the code needlessly */
		1965	/* complicated, but so we can run multiple perl coros from one cctx */
		1966
		1967	do
		1968	{
		1969	struct coro_transfer_args ta;
		1970
		1971	slf_frame.prepare (aTHX_ &ta);
		1972	TRANSFER (ta, 0);
		1973
		1974	checkmark = PL_stack_sp - PL_stack_base;
		1975	}
		1976	while (slf_frame.check (aTHX_ &slf_frame));
		1977
		1978	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1979
		1980	/* exception handling */
		1981	if (expect_false (CORO_THROW))
		1982	{
		1983	SV *exception = sv_2mortal (CORO_THROW);
		1984
		1985	CORO_THROW = 0;
		1986	sv_setsv (ERRSV, exception);
		1987	croak (0);
		1988	}
		1989
		1990	/* return value handling - mostly like entersub */
		1991	/* make sure we put something on the stack in scalar context */
		1992	if (GIMME_V == G_SCALAR)
		1993	{
		1994	dSP;
		1995	SV **bot = PL_stack_base + checkmark;
		1996
		1997	if (sp == bot) /* too few, push undef */
		1998	bot [1] = &PL_sv_undef;
		1999	else if (sp != bot + 1) /* too many, take last one */
		2000	bot [1] = *sp;
		2001
		2002	SP = bot + 1;
		2003
		2004	PUTBACK;
		2005	}
		2006
		2007	return NORMAL;
		2008	}
		2009
		2010	static void
		2011	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		2012	{
		2013	int i;
		2014	SV **arg = PL_stack_base + ax;
		2015	int items = PL_stack_sp - arg + 1;
		2016
		2017	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		2018
		2019	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		2020	&& PL_op->op_ppaddr != pp_slf)
		2021	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		2022
		2023	CvFLAGS (cv) |= CVf_SLF;
		2024	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		2025	slf_cv = cv;
		2026
		2027	/* we patch the op, and then re-run the whole call */
		2028	/* we have to put the same argument on the stack for this to work */
		2029	/* and this will be done by pp_restore */
		2030	slf_restore.op_next = (OP *)&slf_restore;
		2031	slf_restore.op_type = OP_CUSTOM;
		2032	slf_restore.op_ppaddr = pp_restore;
		2033	slf_restore.op_first = PL_op;
		2034
		2035	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		2036
		2037	if (PL_op->op_flags & OPf_STACKED)
		2038	{
		2039	if (items > slf_arga)
		2040	{
		2041	slf_arga = items;
		2042	free (slf_argv);
		2043	slf_argv = malloc (slf_arga * sizeof (SV *));
		2044	}
		2045
		2046	slf_argc = items;
		2047
		2048	for (i = 0; i < items; ++i)
		2049	slf_argv [i] = SvREFCNT_inc (arg [i]);
		2050	}
		2051	else
		2052	slf_argc = 0;
		2053
		2054	PL_op->op_ppaddr = pp_slf;
		2055	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		2056
		2057	PL_op = (OP *)&slf_restore;
1723	}	2058	}
1724		2059
1725	/*****************************************************************************/	2060	/*****************************************************************************/
1726	/* PerlIO::cede */	2061	/* PerlIO::cede */
1727		2062
…		…
1796	PerlIOBuf_get_cnt,	2131	PerlIOBuf_get_cnt,
1797	PerlIOBuf_set_ptrcnt,	2132	PerlIOBuf_set_ptrcnt,
1798	};	2133	};
1799		2134
1800	/*****************************************************************************/	2135	/*****************************************************************************/
		2136	/* Coro::Semaphore & Coro::Signal */
1801		2137
1802	static const CV *slf_cv; /* for quick consistency check */
1803
1804	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1805	static SV *slf_arg0;
1806	static SV *slf_arg1;
1807	static SV *slf_arg2;
1808
1809	/* this restores the stack in the case we patched the entersub, to */
1810	/* recreate the stack frame as perl will on following calls */
1811	/* since entersub cleared the stack */
1812	static OP *	2138	static SV *
1813	pp_restore (pTHX)	2139	coro_waitarray_new (pTHX_ int count)
1814	{	2140	{
1815	dSP;	2141	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2142	AV *av = newAV ();
		2143	SV **ary;
1816		2144
1817	PUSHMARK (SP);	2145	/* unfortunately, building manually saves memory */
		2146	Newx (ary, 2, SV *);
		2147	AvALLOC (av) = ary;
		2148	/*AvARRAY (av) = ary;*/
		2149	SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
		2150	AvMAX (av) = 1;
		2151	AvFILLp (av) = 0;
		2152	ary [0] = newSViv (count);
1818		2153
1819	EXTEND (SP, 3);	2154	return newRV_noinc ((SV *)av);
1820	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1821	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1822	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1823	PUSHs ((SV *)CvGV (slf_cv));
1824
1825	RETURNOP (slf_restore.op_first);
1826	}	2155	}
1827		2156
1828	static void	2157	/* semaphore */
1829	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1830	{
1831	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1832	}
1833		2158
1834	static void	2159	static void
1835	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)	2160	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1836	{	2161	{
1837	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));	2162	SV *count_sv = AvARRAY (av)[0];
		2163	IV count = SvIVX (count_sv);
1838		2164
1839	frame->prepare = slf_prepare_set_stacklevel;	2165	count += adjust;
1840	frame->check = slf_check_nop;	2166	SvIVX (count_sv) = count;
1841	frame->data = (void *)SvIV (arg [0]);
1842	}
1843		2167
1844	static void	2168	/* now wake up as many waiters as are expected to lock */
1845	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)	2169	while (count > 0 && AvFILLp (av) > 0)
1846	{
1847	SV **arg = (SV **)slf_frame.data;
1848
1849	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1850	}
1851
1852	static void
1853	slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1854	{
1855	if (items != 2)
1856	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1857
1858	frame->prepare = slf_prepare_transfer;
1859	frame->check = slf_check_nop;
1860	frame->data = (void *)arg; /* let's hope it will stay valid */
1861	}
1862
1863	static void
1864	slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1865	{
1866	frame->prepare = prepare_schedule;
1867	frame->check = slf_check_nop;
1868	}
1869
1870	static void
1871	slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872	{
1873	frame->prepare = prepare_cede;
1874	frame->check = slf_check_nop;
1875	}
1876
1877	static void
1878	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1879	{
1880	frame->prepare = prepare_cede_notself;
1881	frame->check = slf_check_nop;
1882	}
1883
1884	/* we hijack an hopefully unused CV flag for our purposes */
1885	#define CVf_SLF 0x4000
1886
1887	/*
1888	* these not obviously related functions are all rolled into one
1889	* function to increase chances that they all will call transfer with the same
1890	* stack offset
1891	* SLF stands for "schedule-like-function".
1892	*/
1893	static OP *
1894	pp_slf (pTHX)
1895	{
1896	I32 checkmark; /* mark SP to see how many elements check has pushed */
1897
1898	/* set up the slf frame, unless it has already been set-up */
1899	/* the latter happens when a new coro has been started */
1900	/* or when a new cctx was attached to an existing coroutine */
1901	if (expect_true (!slf_frame.prepare))
1902	{	2170	{
1903	/* first iteration */	2171	SV *cb;
1904	dSP;
1905	SV **arg = PL_stack_base + TOPMARK + 1;
1906	int items = SP - arg; /* args without function object */
1907	SV *gv = *sp;
1908		2172
1909	/* do a quick consistency check on the "function" object, and if it isn't */	2173	/* swap first two elements so we can shift a waiter */
1910	/* for us, divert to the real entersub */	2174	AvARRAY (av)[0] = AvARRAY (av)[1];
1911	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))	2175	AvARRAY (av)[1] = count_sv;
1912	return PL_ppaddr[OP_ENTERSUB](aTHX);	2176	cb = av_shift (av);
1913		2177
1914	/* pop args */	2178	if (SvOBJECT (cb))
1915	SP = PL_stack_base + POPMARK;
1916
1917	if (!(PL_op->op_flags & OPf_STACKED))
1918	{	2179	{
1919	/* ampersand-form of call, use @_ instead of stack */	2180	api_ready (aTHX_ cb);
1920	AV *av = GvAV (PL_defgv);	2181	--count;
1921	arg = AvARRAY (av);
1922	items = AvFILLp (av) + 1;
1923	}	2182	}
1924		2183	else if (SvTYPE (cb) == SVt_PVCV)
1925	PUTBACK;
1926
1927	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1928	}
1929
1930	/* now interpret the slf_frame */
1931	/* we use a callback system not to make the code needlessly */
1932	/* complicated, but so we can run multiple perl coros from one cctx */
1933
1934	do
1935	{
1936	struct coro_transfer_args ta;
1937
1938	slf_frame.prepare (aTHX_ &ta);
1939	TRANSFER (ta, 0);
1940
1941	checkmark = PL_stack_sp - PL_stack_base;
1942	}
1943	while (slf_frame.check (aTHX_ &slf_frame));
1944
1945	{
1946	dSP;
1947	SV **bot = PL_stack_base + checkmark;
1948	int gimme = GIMME_V;
1949
1950	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1951
1952	/* make sure we put something on the stack in scalar context */
1953	if (gimme == G_SCALAR)
1954	{	2184	{
1955	if (sp == bot)	2185	dSP;
1956	XPUSHs (&PL_sv_undef);	2186	PUSHMARK (SP);
1957		2187	XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1958	SP = bot + 1;	2188	PUTBACK;
		2189	call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1959	}	2190	}
1960		2191
1961	PUTBACK;	2192	SvREFCNT_dec (cb);
1962	}	2193	}
1963
1964	return NORMAL;
1965	}	2194	}
1966		2195
1967	static void	2196	static void
1968	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)	2197	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
1969	{	2198	{
1970	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));	2199	/* call $sem->adjust (0) to possibly wake up some other waiters */
1971		2200	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
1972	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1973	&& PL_op->op_ppaddr != pp_slf)
1974	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1975
1976	if (items > 3)
1977	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1978
1979	CvFLAGS (cv) |= CVf_SLF;
1980	CvXSUBANY (cv).any_ptr = (void *)init_cb;
1981	slf_cv = cv;
1982
1983	/* we patch the op, and then re-run the whole call */
1984	/* we have to put the same argument on the stack for this to work */
1985	/* and this will be done by pp_restore */
1986	slf_restore.op_next = (OP *)&slf_restore;
1987	slf_restore.op_type = OP_NULL;
1988	slf_restore.op_ppaddr = pp_restore;
1989	slf_restore.op_first = PL_op;
1990
1991	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1992	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1993	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1994
1995	PL_op->op_ppaddr = pp_slf;
1996
1997	PL_op = (OP *)&slf_restore;
1998	}	2201	}
1999
2000	/*****************************************************************************/
2001		2202
2002	static int	2203	static int
2003	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)	2204	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2004	{	2205	{
2005	AV *av = (AV *)frame->data;	2206	AV *av = (AV *)frame->data;
2006	SV *count_sv = AvARRAY (av)[0];	2207	SV *count_sv = AvARRAY (av)[0];
2007		2208
		2209	/* if we are about to throw, don't actually acquire the lock, just throw */
		2210	if (CORO_THROW)
		2211	return 0;
2008	if (SvIVX (count_sv) > 0)	2212	else if (SvIVX (count_sv) > 0)
2009	{	2213	{
		2214	SvSTATE_current->on_destroy = 0;
		2215
		2216	if (acquire)
2010	SvIVX (count_sv) = SvIVX (count_sv) - 1;	2217	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2218	else
		2219	coro_semaphore_adjust (aTHX_ av, 0);
		2220
2011	return 0;	2221	return 0;
2012	}	2222	}
2013	else	2223	else
2014	{	2224	{
2015	int i;	2225	int i;
…		…
2024	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2234	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2025	return 1;	2235	return 1;
2026	}	2236	}
2027	}	2237	}
2028		2238
2029	static void	2239	static int
		2240	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2241	{
		2242	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2243	}
		2244
		2245	static int
		2246	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2247	{
		2248	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2249	}
		2250
		2251	static void
2030	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)	2252	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2031	{	2253	{
2032	AV *av = (AV *)SvRV (arg [0]);	2254	AV *av = (AV *)SvRV (arg [0]);
2033		2255
2034	if (SvIVX (AvARRAY (av)[0]) > 0)	2256	if (SvIVX (AvARRAY (av)[0]) > 0)
2035	{	2257	{
…		…
2040	{	2262	{
2041	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2263	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2042		2264
2043	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));	2265	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2044	frame->prepare = prepare_schedule;	2266	frame->prepare = prepare_schedule;
2045	}
2046		2267
		2268	/* to avoid race conditions when a woken-up coro gets terminated */
		2269	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2270	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2271	}
		2272	}
		2273
		2274	static void
		2275	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2276	{
		2277	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2047	frame->check = slf_check_semaphore_down;	2278	frame->check = slf_check_semaphore_down;
		2279	}
2048		2280
		2281	static void
		2282	slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2283	{
		2284	if (items >= 2)
		2285	{
		2286	/* callback form */
		2287	AV *av = (AV *)SvRV (arg [0]);
		2288	HV *st;
		2289	GV *gvp;
		2290	CV *cb_cv = sv_2cv (arg [1], &st, &gvp, 0);
		2291
		2292	av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
		2293
		2294	if (SvIVX (AvARRAY (av)[0]) > 0)
		2295	coro_semaphore_adjust (aTHX_ av, 0);
		2296
		2297	frame->prepare = prepare_nop;
		2298	frame->check = slf_check_nop;
		2299	}
		2300	else
		2301	{
		2302	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2303	frame->check = slf_check_semaphore_wait;
		2304	}
		2305	}
		2306
		2307	/* signal */
		2308
		2309	static void
		2310	coro_signal_wake (pTHX_ AV *av, int count)
		2311	{
		2312	SvIVX (AvARRAY (av)[0]) = 0;
		2313
		2314	/* now signal count waiters */
		2315	while (count > 0 && AvFILLp (av) > 0)
		2316	{
		2317	SV *cb;
		2318
		2319	/* swap first two elements so we can shift a waiter */
		2320	cb = AvARRAY (av)[0];
		2321	AvARRAY (av)[0] = AvARRAY (av)[1];
		2322	AvARRAY (av)[1] = cb;
		2323
		2324	cb = av_shift (av);
		2325
		2326	api_ready (aTHX_ cb);
		2327	sv_setiv (cb, 0); /* signal waiter */
		2328	SvREFCNT_dec (cb);
		2329
		2330	--count;
		2331	}
		2332	}
		2333
		2334	static int
		2335	slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
		2336	{
		2337	/* if we are about to throw, also stop waiting */
		2338	return SvROK ((SV *)frame->data) && !CORO_THROW;
		2339	}
		2340
		2341	static void
		2342	slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2343	{
		2344	AV *av = (AV *)SvRV (arg [0]);
		2345
		2346	if (SvIVX (AvARRAY (av)[0]))
		2347	{
		2348	SvIVX (AvARRAY (av)[0]) = 0;
		2349	frame->prepare = prepare_nop;
		2350	frame->check = slf_check_nop;
		2351	}
		2352	else
		2353	{
		2354	SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
		2355
		2356	av_push (av, waiter);
		2357
		2358	frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
		2359	frame->prepare = prepare_schedule;
		2360	frame->check = slf_check_signal_wait;
		2361	}
2049	}	2362	}
2050		2363
2051	/*****************************************************************************/	2364	/*****************************************************************************/
		2365	/* Coro::AIO */
2052		2366
2053	#define GENSUB_ARG CvXSUBANY (cv).any_ptr	2367	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2054		2368
2055	/* create a closure from XS, returns a code reference */	2369	/* helper storage struct */
2056	/* the arg can be accessed via GENSUB_ARG from the callback */	2370	struct io_state
2057	/* the callback must use dXSARGS/XSRETURN */
2058	static SV *
2059	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2060	{	2371	{
2061	CV *cv = (CV *)NEWSV (0, 0);	2372	int errorno;
		2373	I32 laststype; /* U16 in 5.10.0 */
		2374	int laststatval;
		2375	Stat_t statcache;
		2376	};
2062		2377
		2378	static void
		2379	coro_aio_callback (pTHX_ CV *cv)
		2380	{
		2381	dXSARGS;
		2382	AV *state = (AV *)GENSUB_ARG;
		2383	SV *coro = av_pop (state);
		2384	SV *data_sv = newSV (sizeof (struct io_state));
		2385
		2386	av_extend (state, items);
		2387
2063	sv_upgrade ((SV *)cv, SVt_PVCV);	2388	sv_upgrade (data_sv, SVt_PV);
		2389	SvCUR_set (data_sv, sizeof (struct io_state));
		2390	SvPOK_only (data_sv);
2064		2391
2065	CvANON_on (cv);	2392	{
2066	CvISXSUB_on (cv);	2393	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2067	CvXSUB (cv) = xsub;
2068	GENSUB_ARG = arg;
2069		2394
2070	return newRV_noinc ((SV *)cv);	2395	data->errorno = errno;
		2396	data->laststype = PL_laststype;
		2397	data->laststatval = PL_laststatval;
		2398	data->statcache = PL_statcache;
		2399	}
		2400
		2401	/* now build the result vector out of all the parameters and the data_sv */
		2402	{
		2403	int i;
		2404
		2405	for (i = 0; i < items; ++i)
		2406	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2407	}
		2408
		2409	av_push (state, data_sv);
		2410
		2411	api_ready (aTHX_ coro);
		2412	SvREFCNT_dec (coro);
		2413	SvREFCNT_dec ((AV *)state);
		2414	}
		2415
		2416	static int
		2417	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2418	{
		2419	AV *state = (AV *)frame->data;
		2420
		2421	/* if we are about to throw, return early */
		2422	/* this does not cancel the aio request, but at least */
		2423	/* it quickly returns */
		2424	if (CORO_THROW)
		2425	return 0;
		2426
		2427	/* one element that is an RV? repeat! */
		2428	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2429	return 1;
		2430
		2431	/* restore status */
		2432	{
		2433	SV *data_sv = av_pop (state);
		2434	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2435
		2436	errno = data->errorno;
		2437	PL_laststype = data->laststype;
		2438	PL_laststatval = data->laststatval;
		2439	PL_statcache = data->statcache;
		2440
		2441	SvREFCNT_dec (data_sv);
		2442	}
		2443
		2444	/* push result values */
		2445	{
		2446	dSP;
		2447	int i;
		2448
		2449	EXTEND (SP, AvFILLp (state) + 1);
		2450	for (i = 0; i <= AvFILLp (state); ++i)
		2451	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2452
		2453	PUTBACK;
		2454	}
		2455
		2456	return 0;
		2457	}
		2458
		2459	static void
		2460	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2461	{
		2462	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2463	SV *coro_hv = SvRV (coro_current);
		2464	struct coro *coro = SvSTATE_hv (coro_hv);
		2465
		2466	/* put our coroutine id on the state arg */
		2467	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2468
		2469	/* first see whether we have a non-zero priority and set it as AIO prio */
		2470	if (coro->prio)
		2471	{
		2472	dSP;
		2473
		2474	static SV *prio_cv;
		2475	static SV *prio_sv;
		2476
		2477	if (expect_false (!prio_cv))
		2478	{
		2479	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2480	prio_sv = newSViv (0);
		2481	}
		2482
		2483	PUSHMARK (SP);
		2484	sv_setiv (prio_sv, coro->prio);
		2485	XPUSHs (prio_sv);
		2486
		2487	PUTBACK;
		2488	call_sv (prio_cv, G_VOID | G_DISCARD);
		2489	}
		2490
		2491	/* now call the original request */
		2492	{
		2493	dSP;
		2494	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2495	int i;
		2496
		2497	PUSHMARK (SP);
		2498
		2499	/* first push all args to the stack */
		2500	EXTEND (SP, items + 1);
		2501
		2502	for (i = 0; i < items; ++i)
		2503	PUSHs (arg [i]);
		2504
		2505	/* now push the callback closure */
		2506	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
		2507
		2508	/* now call the AIO function - we assume our request is uncancelable */
		2509	PUTBACK;
		2510	call_sv ((SV *)req, G_VOID | G_DISCARD);
		2511	}
		2512
		2513	/* now that the requets is going, we loop toll we have a result */
		2514	frame->data = (void *)state;
		2515	frame->prepare = prepare_schedule;
		2516	frame->check = slf_check_aio_req;
		2517	}
		2518
		2519	static void
		2520	coro_aio_req_xs (pTHX_ CV *cv)
		2521	{
		2522	dXSARGS;
		2523
		2524	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2525
		2526	XSRETURN_EMPTY;
2071	}	2527	}
2072		2528
2073	/*****************************************************************************/	2529	/*****************************************************************************/
2074		2530
2075	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2531	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
…		…
2077	PROTOTYPES: DISABLE	2533	PROTOTYPES: DISABLE
2078		2534
2079	BOOT:	2535	BOOT:
2080	{	2536	{
2081	#ifdef USE_ITHREADS	2537	#ifdef USE_ITHREADS
2082	MUTEX_INIT (&coro_lock);
2083	# if CORO_PTHREAD	2538	# if CORO_PTHREAD
2084	coro_thx = PERL_GET_CONTEXT;	2539	coro_thx = PERL_GET_CONTEXT;
2085	# endif	2540	# endif
2086	#endif	2541	#endif
2087	BOOT_PAGESIZE;	2542	BOOT_PAGESIZE;
…		…
2107	main_mainstack = PL_mainstack;	2562	main_mainstack = PL_mainstack;
2108	main_top_env = PL_top_env;	2563	main_top_env = PL_top_env;
2109		2564
2110	while (main_top_env->je_prev)	2565	while (main_top_env->je_prev)
2111	main_top_env = main_top_env->je_prev;	2566	main_top_env = main_top_env->je_prev;
		2567
		2568	{
		2569	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2570
		2571	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2572	hv_store_ent (PL_custom_op_names, slf,
		2573	newSVpv ("coro_slf", 0), 0);
		2574
		2575	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2576	hv_store_ent (PL_custom_op_descs, slf,
		2577	newSVpv ("coro schedule like function", 0), 0);
		2578	}
2112		2579
2113	coroapi.ver = CORO_API_VERSION;	2580	coroapi.ver = CORO_API_VERSION;
2114	coroapi.rev = CORO_API_REVISION;	2581	coroapi.rev = CORO_API_REVISION;
2115		2582
2116	coroapi.transfer = api_transfer;	2583	coroapi.transfer = api_transfer;
…		…
2162	}	2629	}
2163	OUTPUT:	2630	OUTPUT:
2164	RETVAL	2631	RETVAL
2165		2632
2166	void	2633	void
2167	_set_stacklevel (...)
2168	CODE:
2169	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
2170
2171	void
2172	transfer (...)	2634	transfer (...)
2173	PROTOTYPE: $$	2635	PROTOTYPE: $$
2174	CODE:	2636	CODE:
2175	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);	2637	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2176		2638
2177	bool	2639	bool
2178	_destroy (SV *coro_sv)	2640	_destroy (SV *coro_sv)
2179	CODE:	2641	CODE:
2180	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2642	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2298		2760
2299	void	2761	void
2300	throw (Coro::State self, SV *throw = &PL_sv_undef)	2762	throw (Coro::State self, SV *throw = &PL_sv_undef)
2301	PROTOTYPE: $;$	2763	PROTOTYPE: $;$
2302	CODE:	2764	CODE:
		2765	{
		2766	struct coro *current = SvSTATE_current;
		2767	SV **throwp = self == current ? &CORO_THROW : &self->except;
2303	SvREFCNT_dec (self->throw);	2768	SvREFCNT_dec (*throwp);
2304	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2769	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2770	}
2305		2771
2306	void	2772	void
2307	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2773	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2308	PROTOTYPE: $;$	2774	PROTOTYPE: $;$
2309	C_ARGS: aTHX_ coro, flags	2775	C_ARGS: aTHX_ coro, flags
…		…
2340		2806
2341	void	2807	void
2342	force_cctx ()	2808	force_cctx ()
2343	PROTOTYPE:	2809	PROTOTYPE:
2344	CODE:	2810	CODE:
2345	struct coro *coro = SvSTATE (coro_current);
2346	coro->cctx->idle_sp = 0;	2811	SvSTATE_current->cctx->idle_sp = 0;
2347		2812
2348	void	2813	void
2349	swap_defsv (Coro::State self)	2814	swap_defsv (Coro::State self)
2350	PROTOTYPE: $	2815	PROTOTYPE: $
2351	ALIAS:	2816	ALIAS:
…		…
2359	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2824	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2360		2825
2361	SV *tmp = *src; *src = *dst; *dst = tmp;	2826	SV *tmp = *src; *src = *dst; *dst = tmp;
2362	}	2827	}
2363		2828
		2829
2364	MODULE = Coro::State PACKAGE = Coro	2830	MODULE = Coro::State PACKAGE = Coro
2365		2831
2366	BOOT:	2832	BOOT:
2367	{	2833	{
2368	int i;	2834	int i;
…		…
2395	coroapi.ready = api_ready;	2861	coroapi.ready = api_ready;
2396	coroapi.is_ready = api_is_ready;	2862	coroapi.is_ready = api_is_ready;
2397	coroapi.nready = coro_nready;	2863	coroapi.nready = coro_nready;
2398	coroapi.current = coro_current;	2864	coroapi.current = coro_current;
2399		2865
2400	GCoroAPI = &coroapi;	2866	/*GCoroAPI = &coroapi;*/
2401	sv_setiv (sv, (IV)&coroapi);	2867	sv_setiv (sv, (IV)&coroapi);
2402	SvREADONLY_on (sv);	2868	SvREADONLY_on (sv);
2403	}	2869	}
2404	}	2870	}
2405		2871
2406	void	2872	void
2407	schedule (...)	2873	schedule (...)
2408	CODE:	2874	CODE:
2409	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);	2875	CORO_EXECUTE_SLF_XS (slf_init_schedule);
2410		2876
2411	void	2877	void
2412	cede (...)	2878	cede (...)
2413	CODE:	2879	CODE:
2414	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);	2880	CORO_EXECUTE_SLF_XS (slf_init_cede);
2415		2881
2416	void	2882	void
2417	cede_notself (...)	2883	cede_notself (...)
2418	CODE:	2884	CODE:
2419	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);	2885	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2420		2886
2421	void	2887	void
2422	_set_current (SV *current)	2888	_set_current (SV *current)
2423	PROTOTYPE: $	2889	PROTOTYPE: $
2424	CODE:	2890	CODE:
…		…
2427		2893
2428	void	2894	void
2429	_set_readyhook (SV *hook)	2895	_set_readyhook (SV *hook)
2430	PROTOTYPE: $	2896	PROTOTYPE: $
2431	CODE:	2897	CODE:
2432	LOCK;
2433	SvREFCNT_dec (coro_readyhook);	2898	SvREFCNT_dec (coro_readyhook);
2434	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2899	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2435	UNLOCK;
2436		2900
2437	int	2901	int
2438	prio (Coro::State coro, int newprio = 0)	2902	prio (Coro::State coro, int newprio = 0)
2439	PROTOTYPE: $;$	2903	PROTOTYPE: $;$
2440	ALIAS:	2904	ALIAS:
…		…
2476	# for async_pool speedup	2940	# for async_pool speedup
2477	void	2941	void
2478	_pool_1 (SV *cb)	2942	_pool_1 (SV *cb)
2479	CODE:	2943	CODE:
2480	{	2944	{
2481	struct coro *coro = SvSTATE (coro_current);
2482	HV *hv = (HV *)SvRV (coro_current);	2945	HV *hv = (HV *)SvRV (coro_current);
		2946	struct coro *coro = SvSTATE_hv ((SV *)hv);
2483	AV *defav = GvAV (PL_defgv);	2947	AV *defav = GvAV (PL_defgv);
2484	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2948	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2485	AV *invoke_av;	2949	AV *invoke_av;
2486	int i, len;	2950	int i, len;
2487		2951
…		…
2514		2978
2515	void	2979	void
2516	_pool_2 (SV *cb)	2980	_pool_2 (SV *cb)
2517	CODE:	2981	CODE:
2518	{	2982	{
2519	struct coro *coro = SvSTATE (coro_current);	2983	HV *hv = (HV *)SvRV (coro_current);
		2984	struct coro *coro = SvSTATE_hv ((SV *)hv);
2520		2985
2521	sv_setsv (cb, &PL_sv_undef);	2986	sv_setsv (cb, &PL_sv_undef);
2522		2987
2523	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2988	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2524	coro->saved_deffh = 0;	2989	coro->saved_deffh = 0;
…		…
2531	SvREFCNT_dec (old);	2996	SvREFCNT_dec (old);
2532	croak ("\3async_pool terminate\2\n");	2997	croak ("\3async_pool terminate\2\n");
2533	}	2998	}
2534		2999
2535	av_clear (GvAV (PL_defgv));	3000	av_clear (GvAV (PL_defgv));
2536	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	3001	hv_store (hv, "desc", sizeof ("desc") - 1,
2537	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	3002	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2538		3003
2539	coro->prio = 0;	3004	coro->prio = 0;
2540		3005
2541	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	3006	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2542	api_trace (aTHX_ coro_current, 0);	3007	api_trace (aTHX_ coro_current, 0);
2543		3008
2544	av_push (av_async_pool, newSVsv (coro_current));	3009	av_push (av_async_pool, newSVsv (coro_current));
2545	}	3010	}
2546		3011
2547		3012	SV *
2548	MODULE = Coro::State PACKAGE = Coro::AIO	3013	rouse_cb ()
		3014	PROTOTYPE:
		3015	CODE:
		3016	RETVAL = coro_new_rouse_cb (aTHX);
		3017	OUTPUT:
		3018	RETVAL
2549		3019
2550	void	3020	void
2551	_get_state (SV *self)	3021	rouse_wait (...)
2552	PROTOTYPE: $	3022	PROTOTYPE: ;$
2553	PPCODE:	3023	PPCODE:
2554	{	3024	CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2555	AV *defav = GvAV (PL_defgv);
2556	AV *av = newAV ();
2557	int i;
2558	SV *data_sv = newSV (sizeof (struct io_state));
2559	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2560	SvCUR_set (data_sv, sizeof (struct io_state));
2561	SvPOK_only (data_sv);
2562
2563	data->errorno = errno;
2564	data->laststype = PL_laststype;
2565	data->laststatval = PL_laststatval;
2566	data->statcache = PL_statcache;
2567
2568	av_extend (av, AvFILLp (defav) + 1 + 1);
2569
2570	for (i = 0; i <= AvFILLp (defav); ++i)
2571	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2572
2573	av_push (av, data_sv);
2574
2575	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2576
2577	api_ready (aTHX_ self);
2578	}
2579
2580	void
2581	_set_state (SV *state)
2582	PROTOTYPE: $
2583	PPCODE:
2584	{
2585	AV *av = (AV *)SvRV (state);
2586	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2587	int i;
2588
2589	errno = data->errorno;
2590	PL_laststype = data->laststype;
2591	PL_laststatval = data->laststatval;
2592	PL_statcache = data->statcache;
2593
2594	EXTEND (SP, AvFILLp (av));
2595	for (i = 0; i < AvFILLp (av); ++i)
2596	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2597	}
2598
2599
2600	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2601
2602	BOOT:
2603	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2604
2605	void
2606	_schedule (...)
2607	CODE:
2608	{
2609	static int incede;
2610
2611	api_cede_notself (aTHX);
2612
2613	++incede;
2614	while (coro_nready >= incede && api_cede (aTHX))
2615	;
2616
2617	sv_setsv (sv_activity, &PL_sv_undef);
2618	if (coro_nready >= incede)
2619	{
2620	PUSHMARK (SP);
2621	PUTBACK;
2622	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2623	SPAGAIN;
2624	}
2625
2626	--incede;
2627	}
2628		3025
2629		3026
2630	MODULE = Coro::State PACKAGE = PerlIO::cede	3027	MODULE = Coro::State PACKAGE = PerlIO::cede
2631		3028
2632	BOOT:	3029	BOOT:
2633	PerlIO_define_layer (aTHX_ &PerlIO_cede);	3030	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2634		3031
		3032
2635	MODULE = Coro::State PACKAGE = Coro::Semaphore	3033	MODULE = Coro::State PACKAGE = Coro::Semaphore
2636		3034
2637	SV *	3035	SV *
2638	new (SV *klass, SV *count_ = 0)	3036	new (SV *klass, SV *count = 0)
2639	CODE:	3037	CODE:
2640	{	3038	RETVAL = sv_bless (
2641	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */	3039	coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
2642	AV *av = newAV ();	3040	GvSTASH (CvGV (cv))
2643	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));	3041	);
2644	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));	3042	OUTPUT:
2645	}	3043	RETVAL
		3044
		3045	# helper for Coro::Channel
		3046	SV *
		3047	_alloc (int count)
		3048	CODE:
		3049	RETVAL = coro_waitarray_new (aTHX_ count);
2646	OUTPUT:	3050	OUTPUT:
2647	RETVAL	3051	RETVAL
2648		3052
2649	SV *	3053	SV *
2650	count (SV *self)	3054	count (SV *self)
…		…
2656	void	3060	void
2657	up (SV *self, int adjust = 1)	3061	up (SV *self, int adjust = 1)
2658	ALIAS:	3062	ALIAS:
2659	adjust = 1	3063	adjust = 1
2660	CODE:	3064	CODE:
2661	{	3065	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2662	AV *av = (AV *)SvRV (self);
2663	SV *count_sv = AvARRAY (av)[0];
2664	IV count = SvIVX (count_sv);
2665
2666	count += ix ? adjust : 1;
2667	SvIVX (count_sv) = count;
2668
2669	/* now wake up as many waiters as possible */
2670	while (count > 0 && AvFILLp (av) >= count)
2671	{
2672	SV *cb;
2673
2674	/* swap first two elements so we can shift a waiter */
2675	AvARRAY (av)[0] = AvARRAY (av)[1];
2676	AvARRAY (av)[1] = count_sv;
2677	cb = av_shift (av);
2678
2679	if (SvOBJECT (cb))
2680	api_ready (aTHX_ cb);
2681	else
2682	croak ("callbacks not yet supported");
2683
2684	SvREFCNT_dec (cb);
2685	}
2686	}
2687		3066
2688	void	3067	void
2689	down (SV *self)	3068	down (...)
2690	CODE:	3069	CODE:
2691	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);	3070	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		3071
		3072	void
		3073	wait (...)
		3074	CODE:
		3075	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2692		3076
2693	void	3077	void
2694	try (SV *self)	3078	try (SV *self)
2695	PPCODE:	3079	PPCODE:
2696	{	3080	{
…		…
2708	XSRETURN_NO;	3092	XSRETURN_NO;
2709	}	3093	}
2710		3094
2711	void	3095	void
2712	waiters (SV *self)	3096	waiters (SV *self)
2713	CODE:	3097	PPCODE:
2714	{	3098	{
2715	AV *av = (AV *)SvRV (self);	3099	AV *av = (AV *)SvRV (self);
		3100	int wcount = AvFILLp (av) + 1 - 1;
2716		3101
2717	if (GIMME_V == G_SCALAR)	3102	if (GIMME_V == G_SCALAR)
2718	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));	3103	XPUSHs (sv_2mortal (newSViv (wcount)));
2719	else	3104	else
2720	{	3105	{
2721	int i;	3106	int i;
2722	EXTEND (SP, AvFILLp (av) + 1 - 1);	3107	EXTEND (SP, wcount);
2723	for (i = 1; i <= AvFILLp (av); ++i)	3108	for (i = 1; i <= wcount; ++i)
2724	PUSHs (newSVsv (AvARRAY (av)[i]));	3109	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2725	}	3110	}
2726	}	3111	}
2727		3112
		3113	MODULE = Coro::State PACKAGE = Coro::Signal
		3114
		3115	SV *
		3116	new (SV *klass)
		3117	CODE:
		3118	RETVAL = sv_bless (
		3119	coro_waitarray_new (aTHX_ 0),
		3120	GvSTASH (CvGV (cv))
		3121	);
		3122	OUTPUT:
		3123	RETVAL
		3124
		3125	void
		3126	wait (...)
		3127	CODE:
		3128	CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
		3129
		3130	void
		3131	broadcast (SV *self)
		3132	CODE:
		3133	{
		3134	AV *av = (AV *)SvRV (self);
		3135	coro_signal_wake (aTHX_ av, AvFILLp (av));
		3136	}
		3137
		3138	void
		3139	send (SV *self)
		3140	CODE:
		3141	{
		3142	AV *av = (AV *)SvRV (self);
		3143
		3144	if (AvFILLp (av))
		3145	coro_signal_wake (aTHX_ av, 1);
		3146	else
		3147	SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
		3148	}
		3149
		3150	IV
		3151	awaited (SV *self)
		3152	CODE:
		3153	RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
		3154	OUTPUT:
		3155	RETVAL
		3156
		3157
		3158	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		3159
		3160	BOOT:
		3161	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		3162
		3163	void
		3164	_schedule (...)
		3165	CODE:
		3166	{
		3167	static int incede;
		3168
		3169	api_cede_notself (aTHX);
		3170
		3171	++incede;
		3172	while (coro_nready >= incede && api_cede (aTHX))
		3173	;
		3174
		3175	sv_setsv (sv_activity, &PL_sv_undef);
		3176	if (coro_nready >= incede)
		3177	{
		3178	PUSHMARK (SP);
		3179	PUTBACK;
		3180	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		3181	}
		3182
		3183	--incede;
		3184	}
		3185
		3186
		3187	MODULE = Coro::State PACKAGE = Coro::AIO
		3188
		3189	void
		3190	_register (char *target, char *proto, SV *req)
		3191	CODE:
		3192	{
		3193	HV *st;
		3194	GV *gvp;
		3195	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		3196	/* newXSproto doesn't return the CV on 5.8 */
		3197	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		3198	sv_setpv ((SV *)slf_cv, proto);
		3199	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		3200	}
		3201

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