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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.259 by root, Mon Nov 10 00:02:29 2008 UTC vs.
Revision 1.289 by root, Mon Nov 17 08:25:06 2008 UTC

…		…
46	# define BOOT_PAGESIZE (void)0	46	# define BOOT_PAGESIZE (void)0
47	#endif	47	#endif
48		48
49	#if CORO_USE_VALGRIND	49	#if CORO_USE_VALGRIND
50	# include <valgrind/valgrind.h>	50	# include <valgrind/valgrind.h>
51	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52	#else
53	# define REGISTER_STACK(cctx,start,end)
54	#endif	51	#endif
55		52
56	/* the maximum number of idle cctx that will be pooled */	53	/* the maximum number of idle cctx that will be pooled */
57	static int cctx_max_idle = 4;	54	static int cctx_max_idle = 4;
58		55
…		…
98	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
99	#endif	96	#endif
100	#ifndef newSV	97	#ifndef newSV
101	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
102	#endif	99	#endif
		100	#ifndef CvISXSUB_on
		101	# define CvISXSUB_on(cv) (void)cv
		102	#endif
103		103
104	/* 5.8.7 */	104	/* 5.8.7 */
105	#ifndef SvRV_set	105	#ifndef SvRV_set
106	# define SvRV_set(s,v) SvRV(s) = (v)	106	# define SvRV_set(s,v) SvRV(s) = (v)
107	#endif	107	#endif
…		…
119	# define CORO_PREFER_PERL_FUNCTIONS 0	119	# define CORO_PREFER_PERL_FUNCTIONS 0
120	#endif	120	#endif
121		121
122	/* 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
123	* portable way as possible. */	123	* portable way as possible. */
124	#define dSTACKLEVEL volatile char stacklevel	124	#if __GNUC__ >= 4
125	#define STACKLEVEL ((void *)&stacklevel)	125	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
		126	#else
		127	# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
		128	#endif
126		129
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	130	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		131
129	#if __GNUC__ >= 3	132	#if __GNUC__ >= 3
130	# define attribute(x) __attribute__(x)	133	# define attribute(x) __attribute__(x)
131	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132	# define expect(expr,value) __builtin_expect ((expr),(value))	134	# define expect(expr,value) __builtin_expect ((expr),(value))
		135	# define INLINE static inline
133	#else	136	#else
134	# define attribute(x)	137	# define attribute(x)
135	# define BARRIER
136	# define expect(expr,value) (expr)	138	# define expect(expr,value) (expr)
		139	# define INLINE static
137	#endif	140	#endif
138		141
139	#define expect_false(expr) expect ((expr) != 0, 0)	142	#define expect_false(expr) expect ((expr) != 0, 0)
140	#define expect_true(expr) expect ((expr) != 0, 1)	143	#define expect_true(expr) expect ((expr) != 0, 1)
141		144
142	#define NOINLINE attribute ((noinline))	145	#define NOINLINE attribute ((noinline))
143		146
144	#include "CoroAPI.h"	147	#include "CoroAPI.h"
145		148
146	#ifdef USE_ITHREADS	149	#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	150	# if CORO_PTHREAD
152	static void *coro_thx;	151	static void *coro_thx;
153	# endif	152	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	153	#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		154
177	static double (*nvtime)(); /* so why doesn't it take void? */	155	static double (*nvtime)(); /* so why doesn't it take void? */
178		156
179	static U32 cctx_gen;	157	static U32 cctx_gen;
180	static size_t cctx_stacksize = CORO_STACKSIZE;	158	static size_t cctx_stacksize = CORO_STACKSIZE;
181	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
182	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
183	static JMPENV *main_top_env;	161	static JMPENV *main_top_env;
184	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
185	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */	163	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186	static volatile char next_has_throw; /* speedup flag for next->throw check */
187		164
188	static GV *irsgv; /* $/ */	165	static GV *irsgv; /* $/ */
189	static GV *stdoutgv; /* *STDOUT */	166	static GV *stdoutgv; /* *STDOUT */
190	static SV *rv_diehook;	167	static SV *rv_diehook;
191	static SV *rv_warnhook;	168	static SV *rv_warnhook;
…		…
210	CC_TRACE_LINE = 0x10, /* trace each statement */	187	CC_TRACE_LINE = 0x10, /* trace each statement */
211	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212	};	189	};
213		190
214	/* this is a structure representing a c-level coroutine */	191	/* this is a structure representing a c-level coroutine */
215	typedef struct coro_cctx {	192	typedef struct coro_cctx
		193	{
216	struct coro_cctx *next;	194	struct coro_cctx *next;
217		195
218	/* the stack */	196	/* the stack */
219	void *sptr;	197	void *sptr;
220	size_t ssize;	198	size_t ssize;
…		…
238	CF_NEW = 0x0004, /* has never been switched to */	216	CF_NEW = 0x0004, /* has never been switched to */
239	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	217	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
240	};	218	};
241		219
242	/* the structure where most of the perl state is stored, overlaid on the cxstack */	220	/* the structure where most of the perl state is stored, overlaid on the cxstack */
243	typedef struct {	221	typedef struct
		222	{
244	SV *defsv;	223	SV *defsv;
245	AV *defav;	224	AV *defav;
246	SV *errsv;	225	SV *errsv;
247	SV *irsgv;	226	SV *irsgv;
248	#define VAR(name,type) type name;	227	#define VAR(name,type) type name;
…		…
252		231
253	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	232	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
254		233
255	/* this is a structure representing a perl-level coroutine */	234	/* this is a structure representing a perl-level coroutine */
256	struct coro {	235	struct coro {
257	/* the c coroutine allocated to this perl coroutine, if any */	236	/* the C coroutine allocated to this perl coroutine, if any */
258	coro_cctx *cctx;	237	coro_cctx *cctx;
259		238
260	/* process data */	239	/* state data */
		240	struct CoroSLF slf_frame; /* saved slf frame */
261	AV *mainstack;	241	AV *mainstack;
262	perl_slots *slot; /* basically the saved sp */	242	perl_slots *slot; /* basically the saved sp */
263		243
264	AV *args; /* data associated with this coroutine (initial args) */	244	AV *args; /* data associated with this coroutine (initial args) */
265	int refcnt; /* coroutines are refcounted, yes */	245	int refcnt; /* coroutines are refcounted, yes */
266	int flags; /* CF_ flags */	246	int flags; /* CF_ flags */
267	HV *hv; /* the perl hash associated with this coro, if any */	247	HV *hv; /* the perl hash associated with this coro, if any */
		248	void (*on_destroy)(pTHX_ struct coro *coro);
268		249
269	/* statistics */	250	/* statistics */
270	int usecount; /* number of transfers to this coro */	251	int usecount; /* number of transfers to this coro */
271		252
272	/* coro process data */	253	/* coro process data */
…		…
280	struct coro *next, *prev;	261	struct coro *next, *prev;
281	};	262	};
282		263
283	typedef struct coro *Coro__State;	264	typedef struct coro *Coro__State;
284	typedef struct coro *Coro__State_or_hashref;	265	typedef struct coro *Coro__State_or_hashref;
		266
		267	/* the following variables are effectively part of the perl context */
		268	/* and get copied between struct coro and these variables */
		269	/* the mainr easonw e don't support windows process emulation */
		270	static struct CoroSLF slf_frame; /* the current slf frame */
		271	static SV *coro_throw;
285		272
286	/** Coro ********************************************************************/	273	/** Coro ********************************************************************/
287		274
288	#define PRIO_MAX 3	275	#define PRIO_MAX 3
289	#define PRIO_HIGH 1	276	#define PRIO_HIGH 1
…		…
294		281
295	/* for Coro.pm */	282	/* for Coro.pm */
296	static SV *coro_current;	283	static SV *coro_current;
297	static SV *coro_readyhook;	284	static SV *coro_readyhook;
298	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	285	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
299	static int coro_nready;
300	static struct coro *coro_first;	286	static struct coro *coro_first;
		287	#define coro_nready coroapi.nready
301		288
302	/** lowlevel stuff **********************************************************/	289	/** lowlevel stuff **********************************************************/
303		290
304	static SV *	291	static SV *
305	coro_get_sv (pTHX_ const char *name, int create)	292	coro_get_sv (pTHX_ const char *name, int create)
…		…
390	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	377	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
391		378
392	return 0;	379	return 0;
393	}	380	}
394		381
395	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	382	#define CORO_MAGIC_type_cv 26
396	#define CORO_MAGIC_type_state PERL_MAGIC_ext	383	#define CORO_MAGIC_type_state PERL_MAGIC_ext
397		384
398	static MGVTBL coro_cv_vtbl = {	385	static MGVTBL coro_cv_vtbl = {
399	0, 0, 0, 0,	386	0, 0, 0, 0,
400	coro_cv_free	387	coro_cv_free
401	};	388	};
402		389
		390	#define CORO_MAGIC_NN(sv, type) \
		391	(expect_true (SvMAGIC (sv)->mg_type == type) \
		392	? SvMAGIC (sv) \
		393	: mg_find (sv, type))
		394
403	#define CORO_MAGIC(sv, type) \	395	#define CORO_MAGIC(sv, type) \
404	SvMAGIC (sv) \	396	(expect_true (SvMAGIC (sv)) \
405	? SvMAGIC (sv)->mg_type == type \	397	? CORO_MAGIC_NN (sv, type) \
406	? SvMAGIC (sv) \
407	: mg_find (sv, type) \
408	: 0	398	: 0)
409		399
410	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	400	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
411	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	401	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
412		402
413	static struct coro *	403	INLINE struct coro *
414	SvSTATE_ (pTHX_ SV *coro)	404	SvSTATE_ (pTHX_ SV *coro)
415	{	405	{
416	HV *stash;	406	HV *stash;
417	MAGIC *mg;	407	MAGIC *mg;
418		408
…		…
433	mg = CORO_MAGIC_state (coro);	423	mg = CORO_MAGIC_state (coro);
434	return (struct coro *)mg->mg_ptr;	424	return (struct coro *)mg->mg_ptr;
435	}	425	}
436		426
437	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	427	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		428
		429	/* faster than SvSTATE, but expects a coroutine hv */
		430	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		431	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
438		432
439	/* the next two functions merely cache the padlists */	433	/* the next two functions merely cache the padlists */
440	static void	434	static void
441	get_padlist (pTHX_ CV *cv)	435	get_padlist (pTHX_ CV *cv)
442	{	436	{
…		…
509	CvPADLIST (cv) = (AV *)POPs;	503	CvPADLIST (cv) = (AV *)POPs;
510	}	504	}
511		505
512	PUTBACK;	506	PUTBACK;
513	}	507	}
		508
		509	slf_frame = c->slf_frame;
		510	coro_throw = c->throw;
514	}	511	}
515		512
516	static void	513	static void
517	save_perl (pTHX_ Coro__State c)	514	save_perl (pTHX_ Coro__State c)
518	{	515	{
		516	c->throw = coro_throw;
		517	c->slf_frame = slf_frame;
		518
519	{	519	{
520	dSP;	520	dSP;
521	I32 cxix = cxstack_ix;	521	I32 cxix = cxstack_ix;
522	PERL_CONTEXT *ccstk = cxstack;	522	PERL_CONTEXT *ccstk = cxstack;
523	PERL_SI *top_si = PL_curstackinfo;	523	PERL_SI *top_si = PL_curstackinfo;
…		…
590	#undef VAR	590	#undef VAR
591	}	591	}
592	}	592	}
593		593
594	/*	594	/*
595	* allocate various perl stacks. This is an exact copy	595	* allocate various perl stacks. This is almost an exact copy
596	* of perl.c:init_stacks, except that it uses less memory	596	* of perl.c:init_stacks, except that it uses less memory
597	* on the (sometimes correct) assumption that coroutines do	597	* on the (sometimes correct) assumption that coroutines do
598	* not usually need a lot of stackspace.	598	* not usually need a lot of stackspace.
599	*/	599	*/
600	#if CORO_PREFER_PERL_FUNCTIONS	600	#if CORO_PREFER_PERL_FUNCTIONS
…		…
802		802
803	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	803	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
804	}	804	}
805		805
806	static void	806	static void
		807	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		808	{
		809	/* kind of mega-hacky, but works */
		810	ta->next = ta->prev = (struct coro *)ta;
		811	}
		812
		813	static int
		814	slf_check_nop (pTHX_ struct CoroSLF *frame)
		815	{
		816	return 0;
		817	}
		818
		819	static void NOINLINE /* noinline to keep it out of the transfer fast path */
807	coro_setup (pTHX_ struct coro *coro)	820	coro_setup (pTHX_ struct coro *coro)
808	{	821	{
809	/*	822	/*
810	* emulate part of the perl startup here.	823	* emulate part of the perl startup here.
811	*/	824	*/
…		…
835	PL_rs = newSVsv (GvSV (irsgv));	848	PL_rs = newSVsv (GvSV (irsgv));
836	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	849	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
837		850
838	{	851	{
839	dSP;	852	dSP;
840	LOGOP myop;	853	UNOP myop;
841		854
842	Zero (&myop, 1, LOGOP);	855	Zero (&myop, 1, UNOP);
843	myop.op_next = Nullop;	856	myop.op_next = Nullop;
844	myop.op_flags = OPf_WANT_VOID;	857	myop.op_flags = OPf_WANT_VOID;
845		858
846	PUSHMARK (SP);	859	PUSHMARK (SP);
847	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	860	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
850	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	863	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
851	SPAGAIN;	864	SPAGAIN;
852	}	865	}
853		866
854	/* this newly created coroutine might be run on an existing cctx which most	867	/* this newly created coroutine might be run on an existing cctx which most
855	* likely was suspended in set_stacklevel, called from entersub.	868	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
856	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
857	* so we ENTER here for symmetry
858	*/	869	*/
859	ENTER;	870	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		871	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		872
		873	coro_throw = coro->throw;
860	}	874	}
861		875
862	static void	876	static void
863	coro_destruct (pTHX_ struct coro *coro)	877	coro_destruct (pTHX_ struct coro *coro)
864	{	878	{
…		…
888		902
889	SvREFCNT_dec (PL_diehook);	903	SvREFCNT_dec (PL_diehook);
890	SvREFCNT_dec (PL_warnhook);	904	SvREFCNT_dec (PL_warnhook);
891		905
892	SvREFCNT_dec (coro->saved_deffh);	906	SvREFCNT_dec (coro->saved_deffh);
893	SvREFCNT_dec (coro->throw);	907	SvREFCNT_dec (coro_throw);
894		908
895	coro_destruct_stacks (aTHX);	909	coro_destruct_stacks (aTHX);
896	}	910	}
897		911
898	static void	912	INLINE void
899	free_coro_mortal (pTHX)	913	free_coro_mortal (pTHX)
900	{	914	{
901	if (expect_true (coro_mortal))	915	if (expect_true (coro_mortal))
902	{	916	{
903	SvREFCNT_dec (coro_mortal);	917	SvREFCNT_dec (coro_mortal);
…		…
908	static int	922	static int
909	runops_trace (pTHX)	923	runops_trace (pTHX)
910	{	924	{
911	COP *oldcop = 0;	925	COP *oldcop = 0;
912	int oldcxix = -2;	926	int oldcxix = -2;
913	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	927	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
914	coro_cctx *cctx = coro->cctx;	928	coro_cctx *cctx = coro->cctx;
915		929
916	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	930	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
917	{	931	{
918	PERL_ASYNC_CHECK ();	932	PERL_ASYNC_CHECK ();
…		…
1027		1041
1028	TAINT_NOT;	1042	TAINT_NOT;
1029	return 0;	1043	return 0;
1030	}	1044	}
1031		1045
		1046	static void
		1047	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
		1048	{
		1049	ta->prev = (struct coro *)cctx;
		1050	ta->next = 0;
		1051	}
		1052
1032	/* inject a fake call to Coro::State::_cctx_init into the execution */	1053	/* inject a fake call to Coro::State::_cctx_init into the execution */
1033	/* _cctx_init should be careful, as it could be called at almost any time */	1054	/* _cctx_init should be careful, as it could be called at almost any time */
1034	/* during execution of a perl program */	1055	/* during execution of a perl program */
1035	/* also initialises PL_top_env */	1056	/* also initialises PL_top_env */
1036	static void NOINLINE	1057	static void NOINLINE
1037	cctx_prepare (pTHX_ coro_cctx *cctx)	1058	cctx_prepare (pTHX_ coro_cctx *cctx)
1038	{	1059	{
1039	dSP;	1060	dSP;
1040	LOGOP myop;	1061	UNOP myop;
1041		1062
1042	PL_top_env = &PL_start_env;	1063	PL_top_env = &PL_start_env;
1043		1064
1044	if (cctx->flags & CC_TRACE)	1065	if (cctx->flags & CC_TRACE)
1045	PL_runops = runops_trace;	1066	PL_runops = runops_trace;
1046		1067
1047	Zero (&myop, 1, LOGOP);	1068	Zero (&myop, 1, UNOP);
1048	myop.op_next = PL_op;	1069	myop.op_next = PL_op;
1049	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1070	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1050		1071
1051	PUSHMARK (SP);	1072	PUSHMARK (SP);
1052	EXTEND (SP, 2);	1073	EXTEND (SP, 2);
1053	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1074	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1054	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1075	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1055	PUTBACK;	1076	PUTBACK;
1056	PL_op = (OP *)&myop;	1077	PL_op = (OP *)&myop;
1057	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1078	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1058	SPAGAIN;	1079	SPAGAIN;
1059	}	1080	}
1060		1081
1061	/* the tail of transfer: execute stuff we can onyl do afetr a transfer */	1082	/* the tail of transfer: execute stuff we can only do after a transfer */
1062	static void	1083	INLINE void
1063	transfer_tail (void)	1084	transfer_tail (pTHX)
1064	{	1085	{
1065	UNLOCK;	1086	free_coro_mortal (aTHX);
1066
1067	if (expect_false (next_has_throw))
1068	{
1069	struct coro *coro = SvSTATE (coro_current);
1070
1071	if (coro->throw)
1072	{
1073	SV *exception = coro->throw;
1074	coro->throw = 0;
1075	sv_setsv (ERRSV, exception);
1076	croak (0);
1077	}
1078	}
1079	}	1087	}
1080		1088
1081	/*	1089	/*
1082	* this is a _very_ stripped down perl interpreter ;)	1090	* this is a _very_ stripped down perl interpreter ;)
1083	*/	1091	*/
…		…
1090	# endif	1098	# endif
1091	#endif	1099	#endif
1092	{	1100	{
1093	dTHX;	1101	dTHX;
1094		1102
1095	/* we now skip the entersub that lead to transfer () */	1103	/* normally we would need to skip the entersub here */
		1104	/* not doing so will re-execute it, which is exactly what we want */
1096	PL_op = PL_op->op_next;	1105	/* PL_nop = PL_nop->op_next */
1097		1106
1098	/* inject a fake subroutine call to cctx_init */	1107	/* inject a fake subroutine call to cctx_init */
1099	cctx_prepare (aTHX_ (coro_cctx *)arg);	1108	cctx_prepare (aTHX_ (coro_cctx *)arg);
1100		1109
1101	/* cctx_run is the alternative tail of transfer () */	1110	/* cctx_run is the alternative tail of transfer() */
1102	transfer_tail ();	1111	transfer_tail (aTHX);
1103		1112
1104	/* somebody or something will hit me for both perl_run and PL_restartop */	1113	/* somebody or something will hit me for both perl_run and PL_restartop */
1105	PL_restartop = PL_op;	1114	PL_restartop = PL_op;
1106	perl_run (PL_curinterp);	1115	perl_run (PL_curinterp);
1107		1116
…		…
1125	++cctx_count;	1134	++cctx_count;
1126	New (0, cctx, 1, coro_cctx);	1135	New (0, cctx, 1, coro_cctx);
1127		1136
1128	cctx->gen = cctx_gen;	1137	cctx->gen = cctx_gen;
1129	cctx->flags = 0;	1138	cctx->flags = 0;
1130	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel */	1139	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1131		1140
1132	return cctx;	1141	return cctx;
1133	}	1142	}
1134		1143
1135	/* create a new cctx only suitable as source */	1144	/* create a new cctx only suitable as source */
…		…
1157	/* mmap supposedly does allocate-on-write for us */	1166	/* mmap supposedly does allocate-on-write for us */
1158	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1167	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1159		1168
1160	if (cctx->sptr != (void *)-1)	1169	if (cctx->sptr != (void *)-1)
1161	{	1170	{
1162	# if CORO_STACKGUARD	1171	#if CORO_STACKGUARD
1163	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1172	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1164	# endif	1173	#endif
1165	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1174	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1166	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1175	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1167	cctx->flags |= CC_MAPPED;	1176	cctx->flags |= CC_MAPPED;
1168	}	1177	}
1169	else	1178	else
1170	#endif	1179	#endif
1171	{	1180	{
1172	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1181	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1173	New (0, cctx->sptr, cctx_stacksize, long);	1182	New (0, cctx->sptr, cctx_stacksize, long);
1174		1183
1175	if (!cctx->sptr)	1184	if (!cctx->sptr)
1176	{	1185	{
1177	perror ("FATAL: unable to allocate stack for coroutine");	1186	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1178	_exit (EXIT_FAILURE);	1187	_exit (EXIT_FAILURE);
1179	}	1188	}
1180		1189
1181	stack_start = cctx->sptr;	1190	stack_start = cctx->sptr;
1182	stack_size = cctx->ssize;	1191	stack_size = cctx->ssize;
1183	}	1192	}
1184		1193
1185	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1194	#if CORO_USE_VALGRIND
		1195	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
		1196	#endif
		1197
1186	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1198	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1187		1199
1188	return cctx;	1200	return cctx;
1189	}	1201	}
1190		1202
…		…
1198	coro_destroy (&cctx->cctx);	1210	coro_destroy (&cctx->cctx);
1199		1211
1200	/* coro_transfer creates new, empty cctx's */	1212	/* coro_transfer creates new, empty cctx's */
1201	if (cctx->sptr)	1213	if (cctx->sptr)
1202	{	1214	{
1203	#if CORO_USE_VALGRIND	1215	#if CORO_USE_VALGRIND
1204	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1216	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1205	#endif	1217	#endif
1206		1218
1207	#if HAVE_MMAP	1219	#if HAVE_MMAP
1208	if (cctx->flags & CC_MAPPED)	1220	if (cctx->flags & CC_MAPPED)
1209	munmap (cctx->sptr, cctx->ssize);	1221	munmap (cctx->sptr, cctx->ssize);
1210	else	1222	else
…		…
1237	}	1249	}
1238		1250
1239	static void	1251	static void
1240	cctx_put (coro_cctx *cctx)	1252	cctx_put (coro_cctx *cctx)
1241	{	1253	{
1242	assert (("cctx_put called on non-initialised cctx", cctx->sptr));	1254	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1243		1255
1244	/* free another cctx if overlimit */	1256	/* free another cctx if overlimit */
1245	if (expect_false (cctx_idle >= cctx_max_idle))	1257	if (expect_false (cctx_idle >= cctx_max_idle))
1246	{	1258	{
1247	coro_cctx *first = cctx_first;	1259	coro_cctx *first = cctx_first;
…		…
1259	/** coroutine switching *****************************************************/	1271	/** coroutine switching *****************************************************/
1260		1272
1261	static void	1273	static void
1262	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1274	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1263	{	1275	{
		1276	/* TODO: throwing up here is considered harmful */
		1277
1264	if (expect_true (prev != next))	1278	if (expect_true (prev != next))
1265	{	1279	{
1266	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1280	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1267	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1281	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1268		1282
1269	if (expect_false (next->flags & CF_RUNNING))	1283	if (expect_false (next->flags & CF_RUNNING))
1270	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1284	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1271		1285
1272	if (expect_false (next->flags & CF_DESTROYED))	1286	if (expect_false (next->flags & CF_DESTROYED))
1273	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1287	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1274		1288
1275	#if !PERL_VERSION_ATLEAST (5,10,0)	1289	#if !PERL_VERSION_ATLEAST (5,10,0)
1276	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1290	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1277	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1291	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1278	#endif	1292	#endif
1279	}	1293	}
1280	}	1294	}
1281		1295
1282	/* always use the TRANSFER macro */	1296	/* always use the TRANSFER macro */
1283	static void NOINLINE	1297	static void NOINLINE /* noinline so we have a fixed stackframe */
1284	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1298	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1285	{	1299	{
1286	dSTACKLEVEL;	1300	dSTACKLEVEL;
1287		1301
1288	/* sometimes transfer is only called to set idle_sp */	1302	/* sometimes transfer is only called to set idle_sp */
1289	if (expect_false (!next))	1303	if (expect_false (!next))
1290	{	1304	{
1291	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1305	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1292	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1306	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1293	}	1307	}
1294	else if (expect_true (prev != next))	1308	else if (expect_true (prev != next))
1295	{	1309	{
1296	coro_cctx *prev__cctx;	1310	coro_cctx *prev__cctx;
…		…
1303	prev->flags |= CF_RUNNING;	1317	prev->flags |= CF_RUNNING;
1304	}	1318	}
1305		1319
1306	prev->flags &= ~CF_RUNNING;	1320	prev->flags &= ~CF_RUNNING;
1307	next->flags |= CF_RUNNING;	1321	next->flags |= CF_RUNNING;
1308
1309	LOCK;
1310		1322
1311	/* first get rid of the old state */	1323	/* first get rid of the old state */
1312	save_perl (aTHX_ prev);	1324	save_perl (aTHX_ prev);
1313		1325
1314	if (expect_false (next->flags & CF_NEW))	1326	if (expect_false (next->flags & CF_NEW))
…		…
1321	else	1333	else
1322	load_perl (aTHX_ next);	1334	load_perl (aTHX_ next);
1323		1335
1324	prev__cctx = prev->cctx;	1336	prev__cctx = prev->cctx;
1325		1337
1326	if (prev__cctx->idle_sp == STACKLEVEL) asm volatile("");//D
1327
1328	/* possibly "free" the cctx */	1338	/* possibly untie and reuse the cctx */
1329	if (expect_true (	1339	if (expect_true (
1330	prev__cctx->idle_sp == STACKLEVEL	1340	prev__cctx->idle_sp == (void *)stacklevel
1331	&& !(prev__cctx->flags & CC_TRACE)	1341	&& !(prev__cctx->flags & CC_TRACE)
1332	&& !force_cctx	1342	&& !force_cctx
1333	))	1343	))
1334	{	1344	{
1335	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1345	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1336	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1346	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1337		1347
1338	prev->cctx = 0;	1348	prev->cctx = 0;
1339		1349
1340	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1350	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1341	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1351	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1348		1358
1349	++next->usecount;	1359	++next->usecount;
1350		1360
1351	if (expect_true (!next->cctx))	1361	if (expect_true (!next->cctx))
1352	next->cctx = cctx_get (aTHX);	1362	next->cctx = cctx_get (aTHX);
1353
1354	next_has_throw = !!next->throw;
1355		1363
1356	if (expect_false (prev__cctx != next->cctx))	1364	if (expect_false (prev__cctx != next->cctx))
1357	{	1365	{
1358	prev__cctx->top_env = PL_top_env;	1366	prev__cctx->top_env = PL_top_env;
1359	PL_top_env = next->cctx->top_env;	1367	PL_top_env = next->cctx->top_env;
1360	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1368	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1361	}	1369	}
1362		1370
1363	free_coro_mortal (aTHX);
1364	UNLOCK;
1365
1366	transfer_tail ();	1371	transfer_tail (aTHX);
1367	}	1372	}
1368	}	1373	}
1369
1370	struct transfer_args
1371	{
1372	struct coro *prev, *next;
1373	};
1374		1374
1375	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1375	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1376	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1376	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1377		1377
1378	/** high level stuff ********************************************************/	1378	/** high level stuff ********************************************************/
…		…
1380	static int	1380	static int
1381	coro_state_destroy (pTHX_ struct coro *coro)	1381	coro_state_destroy (pTHX_ struct coro *coro)
1382	{	1382	{
1383	if (coro->flags & CF_DESTROYED)	1383	if (coro->flags & CF_DESTROYED)
1384	return 0;	1384	return 0;
		1385
		1386	if (coro->on_destroy)
		1387	coro->on_destroy (aTHX_ coro);
1385		1388
1386	coro->flags |= CF_DESTROYED;	1389	coro->flags |= CF_DESTROYED;
1387		1390
1388	if (coro->flags & CF_READY)	1391	if (coro->flags & CF_READY)
1389	{	1392	{
1390	/* reduce nready, as destroying a ready coro effectively unreadies it */	1393	/* reduce nready, as destroying a ready coro effectively unreadies it */
1391	/* alternative: look through all ready queues and remove the coro */	1394	/* alternative: look through all ready queues and remove the coro */
1392	LOCK;
1393	--coro_nready;	1395	--coro_nready;
1394	UNLOCK;
1395	}	1396	}
1396	else	1397	else
1397	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1398	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1398		1399
1399	if (coro->mainstack && coro->mainstack != main_mainstack)	1400	if (coro->mainstack && coro->mainstack != main_mainstack)
1400	{	1401	{
1401	struct coro temp;	1402	struct coro temp;
1402		1403
1403	if (coro->flags & CF_RUNNING)	1404	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1404	croak ("FATAL: tried to destroy currently running coroutine");
1405		1405
1406	save_perl (aTHX_ &temp);	1406	save_perl (aTHX_ &temp);
1407	load_perl (aTHX_ coro);	1407	load_perl (aTHX_ coro);
1408		1408
1409	coro_destruct (aTHX_ coro);	1409	coro_destruct (aTHX_ coro);
…		…
1460	# define MGf_DUP 0	1460	# define MGf_DUP 0
1461	#endif	1461	#endif
1462	};	1462	};
1463		1463
1464	static void	1464	static void
1465	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1465	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1466	{	1466	{
1467	ta->prev = SvSTATE (prev_sv);	1467	ta->prev = SvSTATE (prev_sv);
1468	ta->next = SvSTATE (next_sv);	1468	ta->next = SvSTATE (next_sv);
1469	TRANSFER_CHECK (*ta);	1469	TRANSFER_CHECK (*ta);
1470	}	1470	}
1471		1471
1472	static void	1472	static void
1473	api_transfer (SV *prev_sv, SV *next_sv)	1473	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1474	{	1474	{
1475	dTHX;
1476	struct transfer_args ta;	1475	struct coro_transfer_args ta;
1477		1476
1478	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1477	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1479	TRANSFER (ta, 1);	1478	TRANSFER (ta, 1);
1480	}	1479	}
1481		1480
1482	/** Coro ********************************************************************/	1481	/** Coro ********************************************************************/
1483		1482
1484	static void	1483	INLINE void
1485	coro_enq (pTHX_ SV *coro_sv)	1484	coro_enq (pTHX_ struct coro *coro)
1486	{	1485	{
1487	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1486	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1488	}	1487	}
1489		1488
1490	static SV *	1489	INLINE SV *
1491	coro_deq (pTHX)	1490	coro_deq (pTHX)
1492	{	1491	{
1493	int prio;	1492	int prio;
1494		1493
1495	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1494	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1498		1497
1499	return 0;	1498	return 0;
1500	}	1499	}
1501		1500
1502	static int	1501	static int
1503	api_ready (SV *coro_sv)	1502	api_ready (pTHX_ SV *coro_sv)
1504	{	1503	{
1505	dTHX;
1506	struct coro *coro;	1504	struct coro *coro;
1507	SV *sv_hook;	1505	SV *sv_hook;
1508	void (*xs_hook)(void);	1506	void (*xs_hook)(void);
1509		1507
1510	if (SvROK (coro_sv))	1508	if (SvROK (coro_sv))
…		…
1515	if (coro->flags & CF_READY)	1513	if (coro->flags & CF_READY)
1516	return 0;	1514	return 0;
1517		1515
1518	coro->flags |= CF_READY;	1516	coro->flags |= CF_READY;
1519		1517
1520	LOCK;
1521
1522	sv_hook = coro_nready ? 0 : coro_readyhook;	1518	sv_hook = coro_nready ? 0 : coro_readyhook;
1523	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1519	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1524		1520
1525	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1521	coro_enq (aTHX_ coro);
1526	++coro_nready;	1522	++coro_nready;
1527		1523
1528	UNLOCK;
1529
1530	if (sv_hook)	1524	if (sv_hook)
1531	{	1525	{
1532	dSP;	1526	dSP;
1533		1527
1534	ENTER;	1528	ENTER;
…		…
1548		1542
1549	return 1;	1543	return 1;
1550	}	1544	}
1551		1545
1552	static int	1546	static int
1553	api_is_ready (SV *coro_sv)	1547	api_is_ready (pTHX_ SV *coro_sv)
1554	{	1548	{
1555	dTHX;
1556	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1549	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1557	}	1550	}
1558		1551
1559	static void	1552	INLINE void
1560	prepare_schedule (pTHX_ struct transfer_args *ta)	1553	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1561	{	1554	{
1562	SV *prev_sv, *next_sv;	1555	SV *prev_sv, *next_sv;
1563		1556
1564	for (;;)	1557	for (;;)
1565	{	1558	{
1566	LOCK;
1567	next_sv = coro_deq (aTHX);	1559	next_sv = coro_deq (aTHX);
1568		1560
1569	/* nothing to schedule: call the idle handler */	1561	/* nothing to schedule: call the idle handler */
1570	if (expect_false (!next_sv))	1562	if (expect_false (!next_sv))
1571	{	1563	{
1572	dSP;	1564	dSP;
1573	UNLOCK;
1574		1565
1575	ENTER;	1566	ENTER;
1576	SAVETMPS;	1567	SAVETMPS;
1577		1568
1578	PUSHMARK (SP);	1569	PUSHMARK (SP);
…		…
1583	FREETMPS;	1574	FREETMPS;
1584	LEAVE;	1575	LEAVE;
1585	continue;	1576	continue;
1586	}	1577	}
1587		1578
1588	ta->next = SvSTATE (next_sv);	1579	ta->next = SvSTATE_hv (next_sv);
1589		1580
1590	/* cannot transfer to destroyed coros, skip and look for next */	1581	/* cannot transfer to destroyed coros, skip and look for next */
1591	if (expect_false (ta->next->flags & CF_DESTROYED))	1582	if (expect_false (ta->next->flags & CF_DESTROYED))
1592	{	1583	{
1593	UNLOCK;
1594	SvREFCNT_dec (next_sv);	1584	SvREFCNT_dec (next_sv);
1595	/* coro_nready is already taken care of by destroy */	1585	/* coro_nready has already been taken care of by destroy */
1596	continue;	1586	continue;
1597	}	1587	}
1598		1588
1599	--coro_nready;	1589	--coro_nready;
1600	UNLOCK;
1601	break;	1590	break;
1602	}	1591	}
1603		1592
1604	/* free this only after the transfer */	1593	/* free this only after the transfer */
1605	prev_sv = SvRV (coro_current);	1594	prev_sv = SvRV (coro_current);
1606	ta->prev = SvSTATE (prev_sv);	1595	ta->prev = SvSTATE_hv (prev_sv);
1607	TRANSFER_CHECK (*ta);	1596	TRANSFER_CHECK (*ta);
1608	assert (ta->next->flags & CF_READY);	1597	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1609	ta->next->flags &= ~CF_READY;	1598	ta->next->flags &= ~CF_READY;
1610	SvRV_set (coro_current, next_sv);	1599	SvRV_set (coro_current, next_sv);
1611		1600
1612	LOCK;
1613	free_coro_mortal (aTHX);	1601	free_coro_mortal (aTHX);
1614	coro_mortal = prev_sv;	1602	coro_mortal = prev_sv;
1615	UNLOCK;
1616	}	1603	}
1617		1604
1618	static void	1605	INLINE void
1619	prepare_cede (pTHX_ struct transfer_args *ta)	1606	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1620	{	1607	{
1621	api_ready (coro_current);	1608	api_ready (aTHX_ coro_current);
1622	prepare_schedule (aTHX_ ta);	1609	prepare_schedule (aTHX_ ta);
1623	}	1610	}
1624		1611
		1612	INLINE void
		1613	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1614	{
		1615	SV *prev = SvRV (coro_current);
		1616
		1617	if (coro_nready)
		1618	{
		1619	prepare_schedule (aTHX_ ta);
		1620	api_ready (aTHX_ prev);
		1621	}
		1622	else
		1623	prepare_nop (aTHX_ ta);
		1624	}
		1625
		1626	static void
		1627	api_schedule (pTHX)
		1628	{
		1629	struct coro_transfer_args ta;
		1630
		1631	prepare_schedule (aTHX_ &ta);
		1632	TRANSFER (ta, 1);
		1633	}
		1634
1625	static int	1635	static int
1626	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1636	api_cede (pTHX)
1627	{	1637	{
1628	if (coro_nready)	1638	struct coro_transfer_args ta;
1629	{	1639
1630	SV *prev = SvRV (coro_current);
1631	prepare_schedule (aTHX_ ta);	1640	prepare_cede (aTHX_ &ta);
1632	api_ready (prev);	1641
		1642	if (expect_true (ta.prev != ta.next))
		1643	{
		1644	TRANSFER (ta, 1);
1633	return 1;	1645	return 1;
1634	}	1646	}
1635	else	1647	else
1636	return 0;	1648	return 0;
1637	}	1649	}
1638		1650
1639	static void
1640	api_schedule (void)
1641	{
1642	dTHX;
1643	struct transfer_args ta;
1644
1645	prepare_schedule (aTHX_ &ta);
1646	TRANSFER (ta, 1);
1647	}
1648
1649	static int	1651	static int
1650	api_cede (void)	1652	api_cede_notself (pTHX)
1651	{	1653	{
1652	dTHX;	1654	if (coro_nready)
		1655	{
1653	struct transfer_args ta;	1656	struct coro_transfer_args ta;
1654		1657
1655	prepare_cede (aTHX_ &ta);	1658	prepare_cede_notself (aTHX_ &ta);
1656
1657	if (expect_true (ta.prev != ta.next))
1658	{
1659	TRANSFER (ta, 1);	1659	TRANSFER (ta, 1);
1660	return 1;	1660	return 1;
1661	}	1661	}
1662	else	1662	else
1663	return 0;	1663	return 0;
1664	}	1664	}
1665		1665
1666	static int	1666	static void
1667	api_cede_notself (void)
1668	{
1669	dTHX;
1670	struct transfer_args ta;
1671
1672	if (prepare_cede_notself (aTHX_ &ta))
1673	{
1674	TRANSFER (ta, 1);
1675	return 1;
1676	}
1677	else
1678	return 0;
1679	}
1680
1681	static void
1682	api_trace (SV *coro_sv, int flags)	1667	api_trace (pTHX_ SV *coro_sv, int flags)
1683	{	1668	{
1684	dTHX;
1685	struct coro *coro = SvSTATE (coro_sv);	1669	struct coro *coro = SvSTATE (coro_sv);
1686		1670
1687	if (flags & CC_TRACE)	1671	if (flags & CC_TRACE)
1688	{	1672	{
1689	if (!coro->cctx)	1673	if (!coro->cctx)
1690	coro->cctx = cctx_new_run ();	1674	coro->cctx = cctx_new_run ();
1691	else if (!(coro->cctx->flags & CC_TRACE))	1675	else if (!(coro->cctx->flags & CC_TRACE))
1692	croak ("cannot enable tracing on coroutine with custom stack");	1676	croak ("cannot enable tracing on coroutine with custom stack,");
1693		1677
1694	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1678	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1695	}	1679	}
1696	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1680	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1697	{	1681	{
…		…
1702	else	1686	else
1703	coro->slot->runops = RUNOPS_DEFAULT;	1687	coro->slot->runops = RUNOPS_DEFAULT;
1704	}	1688	}
1705	}	1689	}
1706		1690
1707	#if 0	1691	/*****************************************************************************/
		1692	/* schedule-like-function opcode (SLF) */
		1693
		1694	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1695	static const CV *slf_cv;
		1696	static SV **slf_argv;
		1697	static int slf_argc, slf_arga; /* count, allocated */
		1698	static I32 slf_ax; /* top of stack, for restore */
		1699
		1700	/* this restores the stack in the case we patched the entersub, to */
		1701	/* recreate the stack frame as perl will on following calls */
		1702	/* since entersub cleared the stack */
		1703	static OP *
		1704	pp_restore (pTHX)
		1705	{
		1706	int i;
		1707	SV **SP = PL_stack_base + slf_ax;
		1708
		1709	PUSHMARK (SP);
		1710
		1711	EXTEND (SP, slf_argc + 1);
		1712
		1713	for (i = 0; i < slf_argc; ++i)
		1714	PUSHs (sv_2mortal (slf_argv [i]));
		1715
		1716	PUSHs ((SV *)CvGV (slf_cv));
		1717
		1718	RETURNOP (slf_restore.op_first);
		1719	}
		1720
1708	static int	1721	static void
1709	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1722	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1710	{	1723	{
1711	AV *padlist;	1724	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1712	AV *av = (AV *)mg->mg_obj;
1713
1714	abort ();
1715
1716	return 0;
1717	}	1725	}
1718		1726
1719	static MGVTBL coro_gensub_vtbl = {	1727	static void
1720	0, 0, 0, 0,	1728	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1721	coro_gensub_free	1729	{
1722	};	1730	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1723	#endif	1731
		1732	frame->prepare = slf_prepare_set_stacklevel;
		1733	frame->check = slf_check_nop;
		1734	frame->data = (void *)SvIV (arg [0]);
		1735	}
		1736
		1737	static void
		1738	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1739	{
		1740	SV **arg = (SV **)slf_frame.data;
		1741
		1742	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1743	}
		1744
		1745	static void
		1746	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1747	{
		1748	if (items != 2)
		1749	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1750
		1751	frame->prepare = slf_prepare_transfer;
		1752	frame->check = slf_check_nop;
		1753	frame->data = (void *)arg; /* let's hope it will stay valid */
		1754	}
		1755
		1756	static void
		1757	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1758	{
		1759	frame->prepare = prepare_schedule;
		1760	frame->check = slf_check_nop;
		1761	}
		1762
		1763	static void
		1764	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1765	{
		1766	frame->prepare = prepare_cede;
		1767	frame->check = slf_check_nop;
		1768	}
		1769
		1770	static void
		1771	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1772	{
		1773	frame->prepare = prepare_cede_notself;
		1774	frame->check = slf_check_nop;
		1775	}
		1776
		1777	/* we hijack an hopefully unused CV flag for our purposes */
		1778	#define CVf_SLF 0x4000
		1779
		1780	/*
		1781	* these not obviously related functions are all rolled into one
		1782	* function to increase chances that they all will call transfer with the same
		1783	* stack offset
		1784	* SLF stands for "schedule-like-function".
		1785	*/
		1786	static OP *
		1787	pp_slf (pTHX)
		1788	{
		1789	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1790
		1791	/* set up the slf frame, unless it has already been set-up */
		1792	/* the latter happens when a new coro has been started */
		1793	/* or when a new cctx was attached to an existing coroutine */
		1794	if (expect_true (!slf_frame.prepare))
		1795	{
		1796	/* first iteration */
		1797	dSP;
		1798	SV **arg = PL_stack_base + TOPMARK + 1;
		1799	int items = SP - arg; /* args without function object */
		1800	SV *gv = *sp;
		1801
		1802	/* do a quick consistency check on the "function" object, and if it isn't */
		1803	/* for us, divert to the real entersub */
		1804	if (SvTYPE (gv) != SVt_PVGV
		1805	|| !GvCV (gv)
		1806	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1807	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1808
		1809	if (!(PL_op->op_flags & OPf_STACKED))
		1810	{
		1811	/* ampersand-form of call, use @_ instead of stack */
		1812	AV *av = GvAV (PL_defgv);
		1813	arg = AvARRAY (av);
		1814	items = AvFILLp (av) + 1;
		1815	}
		1816
		1817	/* now call the init function, which needs to set up slf_frame */
		1818	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1819	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1820
		1821	/* pop args */
		1822	SP = PL_stack_base + POPMARK;
		1823
		1824	PUTBACK;
		1825	}
		1826
		1827	/* now that we have a slf_frame, interpret it! */
		1828	/* we use a callback system not to make the code needlessly */
		1829	/* complicated, but so we can run multiple perl coros from one cctx */
		1830
		1831	do
		1832	{
		1833	struct coro_transfer_args ta;
		1834
		1835	slf_frame.prepare (aTHX_ &ta);
		1836	TRANSFER (ta, 0);
		1837
		1838	checkmark = PL_stack_sp - PL_stack_base;
		1839	}
		1840	while (slf_frame.check (aTHX_ &slf_frame));
		1841
		1842	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1843
		1844	/* return value handling - mostly like entersub */
		1845	{
		1846	dSP;
		1847	SV **bot = PL_stack_base + checkmark;
		1848	int gimme = GIMME_V;
		1849
		1850	/* make sure we put something on the stack in scalar context */
		1851	if (gimme == G_SCALAR)
		1852	{
		1853	if (sp == bot)
		1854	XPUSHs (&PL_sv_undef);
		1855
		1856	SP = bot + 1;
		1857	}
		1858
		1859	PUTBACK;
		1860	}
		1861
		1862	/* exception handling */
		1863	if (expect_false (coro_throw))
		1864	{
		1865	SV *exception = sv_2mortal (coro_throw);
		1866
		1867	coro_throw = 0;
		1868	sv_setsv (ERRSV, exception);
		1869	croak (0);
		1870	}
		1871
		1872	return NORMAL;
		1873	}
		1874
		1875	static void
		1876	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1877	{
		1878	int i;
		1879	SV **arg = PL_stack_base + ax;
		1880	int items = PL_stack_sp - arg + 1;
		1881
		1882	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1883
		1884	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1885	&& PL_op->op_ppaddr != pp_slf)
		1886	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1887
		1888	CvFLAGS (cv) |= CVf_SLF;
		1889	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1890	slf_cv = cv;
		1891
		1892	/* we patch the op, and then re-run the whole call */
		1893	/* we have to put the same argument on the stack for this to work */
		1894	/* and this will be done by pp_restore */
		1895	slf_restore.op_next = (OP *)&slf_restore;
		1896	slf_restore.op_type = OP_CUSTOM;
		1897	slf_restore.op_ppaddr = pp_restore;
		1898	slf_restore.op_first = PL_op;
		1899
		1900	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1901
		1902	if (PL_op->op_flags & OPf_STACKED)
		1903	{
		1904	if (items > slf_arga)
		1905	{
		1906	slf_arga = items;
		1907	free (slf_argv);
		1908	slf_argv = malloc (slf_arga * sizeof (SV *));
		1909	}
		1910
		1911	slf_argc = items;
		1912
		1913	for (i = 0; i < items; ++i)
		1914	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1915	}
		1916	else
		1917	slf_argc = 0;
		1918
		1919	PL_op->op_ppaddr = pp_slf;
		1920	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1921
		1922	PL_op = (OP *)&slf_restore;
		1923	}
1724		1924
1725	/*****************************************************************************/	1925	/*****************************************************************************/
1726	/* PerlIO::cede */	1926	/* PerlIO::cede */
1727		1927
1728	typedef struct	1928	typedef struct
…		…
1756	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1956	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1757	double now = nvtime ();	1957	double now = nvtime ();
1758		1958
1759	if (now >= self->next)	1959	if (now >= self->next)
1760	{	1960	{
1761	api_cede ();	1961	api_cede (aTHX);
1762	self->next = now + self->every;	1962	self->next = now + self->every;
1763	}	1963	}
1764		1964
1765	return PerlIOBuf_flush (aTHX_ f);	1965	return PerlIOBuf_flush (aTHX_ f);
1766	}	1966	}
…		…
1795	PerlIOBuf_get_ptr,	1995	PerlIOBuf_get_ptr,
1796	PerlIOBuf_get_cnt,	1996	PerlIOBuf_get_cnt,
1797	PerlIOBuf_set_ptrcnt,	1997	PerlIOBuf_set_ptrcnt,
1798	};	1998	};
1799		1999
		2000	/*****************************************************************************/
		2001	/* Coro::Semaphore */
		2002
		2003	static void
		2004	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2005	{
		2006	SV *count_sv = AvARRAY (av)[0];
		2007	IV count = SvIVX (count_sv);
		2008
		2009	count += adjust;
		2010	SvIVX (count_sv) = count;
		2011
		2012	/* now wake up as many waiters as are expected to lock */
		2013	while (count > 0 && AvFILLp (av) > 0)
		2014	{
		2015	SV *cb;
		2016
		2017	/* swap first two elements so we can shift a waiter */
		2018	AvARRAY (av)[0] = AvARRAY (av)[1];
		2019	AvARRAY (av)[1] = count_sv;
		2020	cb = av_shift (av);
		2021
		2022	if (SvOBJECT (cb))
		2023	api_ready (aTHX_ cb);
		2024	else
		2025	croak ("callbacks not yet supported");
		2026
		2027	SvREFCNT_dec (cb);
		2028
		2029	--count;
		2030	}
		2031	}
		2032
		2033	static void
		2034	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2035	{
		2036	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2037	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2038	}
		2039
		2040	static int
		2041	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2042	{
		2043	AV *av = (AV *)frame->data;
		2044	SV *count_sv = AvARRAY (av)[0];
		2045
		2046	if (SvIVX (count_sv) > 0)
		2047	{
		2048	SvSTATE_current->on_destroy = 0;
		2049	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2050	return 0;
		2051	}
		2052	else
		2053	{
		2054	int i;
		2055	/* if we were woken up but can't down, we look through the whole */
		2056	/* waiters list and only add us if we aren't in there already */
		2057	/* this avoids some degenerate memory usage cases */
		2058
		2059	for (i = 1; i <= AvFILLp (av); ++i)
		2060	if (AvARRAY (av)[i] == SvRV (coro_current))
		2061	return 1;
		2062
		2063	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2064	return 1;
		2065	}
		2066	}
		2067
		2068	static void
		2069	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2070	{
		2071	AV *av = (AV *)SvRV (arg [0]);
		2072
		2073	if (SvIVX (AvARRAY (av)[0]) > 0)
		2074	{
		2075	frame->data = (void *)av;
		2076	frame->prepare = prepare_nop;
		2077	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2078	}
		2079	else
		2080	{
		2081	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2082
		2083	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2084	frame->prepare = prepare_schedule;
		2085
		2086	/* to avoid race conditions when a woken-up coro gets terminated */
		2087	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2088	assert (!SvSTATE_current->on_destroy);//D
		2089	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2090	}
		2091
		2092	frame->check = slf_check_semaphore_down;
		2093
		2094	}
		2095
		2096	/*****************************************************************************/
		2097	/* gensub: simple closure generation utility */
		2098
		2099	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2100
		2101	/* create a closure from XS, returns a code reference */
		2102	/* the arg can be accessed via GENSUB_ARG from the callback */
		2103	/* the callback must use dXSARGS/XSRETURN */
		2104	static SV *
		2105	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2106	{
		2107	CV *cv = (CV *)newSV (0);
		2108
		2109	sv_upgrade ((SV *)cv, SVt_PVCV);
		2110
		2111	CvANON_on (cv);
		2112	CvISXSUB_on (cv);
		2113	CvXSUB (cv) = xsub;
		2114	GENSUB_ARG = arg;
		2115
		2116	return newRV_noinc ((SV *)cv);
		2117	}
		2118
		2119	/*****************************************************************************/
		2120	/* Coro::AIO */
		2121
		2122	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2123
		2124	/* helper storage struct */
		2125	struct io_state
		2126	{
		2127	int errorno;
		2128	I32 laststype; /* U16 in 5.10.0 */
		2129	int laststatval;
		2130	Stat_t statcache;
		2131	};
		2132
		2133	static void
		2134	coro_aio_callback (pTHX_ CV *cv)
		2135	{
		2136	dXSARGS;
		2137	AV *state = (AV *)GENSUB_ARG;
		2138	SV *coro = av_pop (state);
		2139	SV *data_sv = newSV (sizeof (struct io_state));
		2140
		2141	av_extend (state, items);
		2142
		2143	sv_upgrade (data_sv, SVt_PV);
		2144	SvCUR_set (data_sv, sizeof (struct io_state));
		2145	SvPOK_only (data_sv);
		2146
		2147	{
		2148	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2149
		2150	data->errorno = errno;
		2151	data->laststype = PL_laststype;
		2152	data->laststatval = PL_laststatval;
		2153	data->statcache = PL_statcache;
		2154	}
		2155
		2156	/* now build the result vector out of all the parameters and the data_sv */
		2157	{
		2158	int i;
		2159
		2160	for (i = 0; i < items; ++i)
		2161	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2162	}
		2163
		2164	av_push (state, data_sv);
		2165
		2166	api_ready (aTHX_ coro);
		2167	SvREFCNT_dec (coro);
		2168	SvREFCNT_dec ((AV *)state);
		2169	}
		2170
		2171	static int
		2172	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2173	{
		2174	AV *state = (AV *)frame->data;
		2175
		2176	/* one element that is an RV? repeat! */
		2177	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2178	return 1;
		2179
		2180	/* restore status */
		2181	{
		2182	SV *data_sv = av_pop (state);
		2183	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2184
		2185	errno = data->errorno;
		2186	PL_laststype = data->laststype;
		2187	PL_laststatval = data->laststatval;
		2188	PL_statcache = data->statcache;
		2189
		2190	SvREFCNT_dec (data_sv);
		2191	}
		2192
		2193	/* push result values */
		2194	{
		2195	dSP;
		2196	int i;
		2197
		2198	EXTEND (SP, AvFILLp (state) + 1);
		2199	for (i = 0; i <= AvFILLp (state); ++i)
		2200	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2201
		2202	PUTBACK;
		2203	}
		2204
		2205	return 0;
		2206	}
		2207
		2208	static void
		2209	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2210	{
		2211	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2212	SV *coro_hv = SvRV (coro_current);
		2213	struct coro *coro = SvSTATE_hv (coro_hv);
		2214
		2215	/* put our coroutine id on the state arg */
		2216	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2217
		2218	/* first see whether we have a non-zero priority and set it as AIO prio */
		2219	if (coro->prio)
		2220	{
		2221	dSP;
		2222
		2223	static SV *prio_cv;
		2224	static SV *prio_sv;
		2225
		2226	if (expect_false (!prio_cv))
		2227	{
		2228	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2229	prio_sv = newSViv (0);
		2230	}
		2231
		2232	PUSHMARK (SP);
		2233	sv_setiv (prio_sv, coro->prio);
		2234	XPUSHs (prio_sv);
		2235
		2236	PUTBACK;
		2237	call_sv (prio_cv, G_VOID | G_DISCARD);
		2238	}
		2239
		2240	/* now call the original request */
		2241	{
		2242	dSP;
		2243	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2244	int i;
		2245
		2246	PUSHMARK (SP);
		2247
		2248	/* first push all args to the stack */
		2249	EXTEND (SP, items + 1);
		2250
		2251	for (i = 0; i < items; ++i)
		2252	PUSHs (arg [i]);
		2253
		2254	/* now push the callback closure */
		2255	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
		2256
		2257	/* now call the AIO function - we assume our request is uncancelable */
		2258	PUTBACK;
		2259	call_sv ((SV *)req, G_VOID | G_DISCARD);
		2260	}
		2261
		2262	/* now that the requets is going, we loop toll we have a result */
		2263	frame->data = (void *)state;
		2264	frame->prepare = prepare_schedule;
		2265	frame->check = slf_check_aio_req;
		2266	}
		2267
		2268	static void
		2269	coro_aio_req_xs (pTHX_ CV *cv)
		2270	{
		2271	dXSARGS;
		2272
		2273	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2274
		2275	XSRETURN_EMPTY;
		2276	}
		2277
		2278	/*****************************************************************************/
1800		2279
1801	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2280	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1802		2281
1803	PROTOTYPES: DISABLE	2282	PROTOTYPES: DISABLE
1804		2283
1805	BOOT:	2284	BOOT:
1806	{	2285	{
1807	#ifdef USE_ITHREADS	2286	#ifdef USE_ITHREADS
1808	MUTEX_INIT (&coro_lock);
1809	# if CORO_PTHREAD	2287	# if CORO_PTHREAD
1810	coro_thx = PERL_GET_CONTEXT;	2288	coro_thx = PERL_GET_CONTEXT;
1811	# endif	2289	# endif
1812	#endif	2290	#endif
1813	BOOT_PAGESIZE;	2291	BOOT_PAGESIZE;
…		…
1834	main_top_env = PL_top_env;	2312	main_top_env = PL_top_env;
1835		2313
1836	while (main_top_env->je_prev)	2314	while (main_top_env->je_prev)
1837	main_top_env = main_top_env->je_prev;	2315	main_top_env = main_top_env->je_prev;
1838		2316
		2317	{
		2318	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2319
		2320	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2321	hv_store_ent (PL_custom_op_names, slf,
		2322	newSVpv ("coro_slf", 0), 0);
		2323
		2324	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2325	hv_store_ent (PL_custom_op_descs, slf,
		2326	newSVpv ("coro schedule like function", 0), 0);
		2327	}
		2328
1839	coroapi.ver = CORO_API_VERSION;	2329	coroapi.ver = CORO_API_VERSION;
1840	coroapi.rev = CORO_API_REVISION;	2330	coroapi.rev = CORO_API_REVISION;
		2331
1841	coroapi.transfer = api_transfer;	2332	coroapi.transfer = api_transfer;
		2333
		2334	coroapi.sv_state = SvSTATE_;
		2335	coroapi.execute_slf = api_execute_slf;
		2336	coroapi.prepare_nop = prepare_nop;
		2337	coroapi.prepare_schedule = prepare_schedule;
		2338	coroapi.prepare_cede = prepare_cede;
		2339	coroapi.prepare_cede_notself = prepare_cede_notself;
1842		2340
1843	{	2341	{
1844	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2342	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1845		2343
1846	if (!svp) croak ("Time::HiRes is required");	2344	if (!svp) croak ("Time::HiRes is required");
…		…
1879	av_push (coro->args, newSVsv (ST (i)));	2377	av_push (coro->args, newSVsv (ST (i)));
1880	}	2378	}
1881	OUTPUT:	2379	OUTPUT:
1882	RETVAL	2380	RETVAL
1883		2381
1884	# these not obviously related functions are all rolled into the same xs
1885	# function to increase chances that they all will call transfer with the same
1886	# stack offset
1887	void	2382	void
1888	_set_stacklevel (...)	2383	_set_stacklevel (...)
1889	ALIAS:	2384	CODE:
1890	Coro::State::transfer = 1	2385	CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1891	Coro::schedule = 2
1892	Coro::cede = 3
1893	Coro::cede_notself = 4
1894	CODE:
1895	{
1896	struct transfer_args ta;
1897		2386
1898	PUTBACK;	2387	void
1899	switch (ix)	2388	transfer (...)
1900	{	2389	PROTOTYPE: $$
1901	case 0:	2390	CODE:
1902	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	2391	CORO_EXECUTE_SLF_XS (slf_init_transfer);
1903	ta.next = 0;
1904	break;
1905
1906	case 1:
1907	if (items != 2)
1908	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1909
1910	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1911	break;
1912
1913	case 2:
1914	prepare_schedule (aTHX_ &ta);
1915	break;
1916
1917	case 3:
1918	prepare_cede (aTHX_ &ta);
1919	break;
1920
1921	case 4:
1922	if (!prepare_cede_notself (aTHX_ &ta))
1923	XSRETURN_EMPTY;
1924
1925	break;
1926	}
1927	SPAGAIN;
1928
1929	BARRIER;
1930	PUTBACK;
1931	TRANSFER (ta, 0);
1932	SPAGAIN; /* might be the sp of a different coroutine now */
1933	/* be extra careful not to ever do anything after TRANSFER */
1934	}
1935		2392
1936	bool	2393	bool
1937	_destroy (SV *coro_sv)	2394	_destroy (SV *coro_sv)
1938	CODE:	2395	CODE:
1939	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2396	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1946	CODE:	2403	CODE:
1947	_exit (code);	2404	_exit (code);
1948		2405
1949	int	2406	int
1950	cctx_stacksize (int new_stacksize = 0)	2407	cctx_stacksize (int new_stacksize = 0)
		2408	PROTOTYPE: ;$
1951	CODE:	2409	CODE:
1952	RETVAL = cctx_stacksize;	2410	RETVAL = cctx_stacksize;
1953	if (new_stacksize)	2411	if (new_stacksize)
1954	{	2412	{
1955	cctx_stacksize = new_stacksize;	2413	cctx_stacksize = new_stacksize;
…		…
1958	OUTPUT:	2416	OUTPUT:
1959	RETVAL	2417	RETVAL
1960		2418
1961	int	2419	int
1962	cctx_max_idle (int max_idle = 0)	2420	cctx_max_idle (int max_idle = 0)
		2421	PROTOTYPE: ;$
1963	CODE:	2422	CODE:
1964	RETVAL = cctx_max_idle;	2423	RETVAL = cctx_max_idle;
1965	if (max_idle > 1)	2424	if (max_idle > 1)
1966	cctx_max_idle = max_idle;	2425	cctx_max_idle = max_idle;
1967	OUTPUT:	2426	OUTPUT:
1968	RETVAL	2427	RETVAL
1969		2428
1970	int	2429	int
1971	cctx_count ()	2430	cctx_count ()
		2431	PROTOTYPE:
1972	CODE:	2432	CODE:
1973	RETVAL = cctx_count;	2433	RETVAL = cctx_count;
1974	OUTPUT:	2434	OUTPUT:
1975	RETVAL	2435	RETVAL
1976		2436
1977	int	2437	int
1978	cctx_idle ()	2438	cctx_idle ()
		2439	PROTOTYPE:
1979	CODE:	2440	CODE:
1980	RETVAL = cctx_idle;	2441	RETVAL = cctx_idle;
1981	OUTPUT:	2442	OUTPUT:
1982	RETVAL	2443	RETVAL
1983		2444
1984	void	2445	void
1985	list ()	2446	list ()
		2447	PROTOTYPE:
1986	PPCODE:	2448	PPCODE:
1987	{	2449	{
1988	struct coro *coro;	2450	struct coro *coro;
1989	for (coro = coro_first; coro; coro = coro->next)	2451	for (coro = coro_first; coro; coro = coro->next)
1990	if (coro->hv)	2452	if (coro->hv)
…		…
2049	RETVAL = boolSV (coro->flags & ix);	2511	RETVAL = boolSV (coro->flags & ix);
2050	OUTPUT:	2512	OUTPUT:
2051	RETVAL	2513	RETVAL
2052		2514
2053	void	2515	void
		2516	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2517	PROTOTYPE: $;$
		2518	CODE:
		2519	{
		2520	struct coro *current = SvSTATE_current;
		2521	SV **throwp = self == current ? &coro_throw : &self->throw;
		2522	SvREFCNT_dec (*throwp);
		2523	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2524	}
		2525
		2526	void
2054	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2527	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2528	PROTOTYPE: $;$
		2529	C_ARGS: aTHX_ coro, flags
2055		2530
2056	SV *	2531	SV *
2057	has_cctx (Coro::State coro)	2532	has_cctx (Coro::State coro)
2058	PROTOTYPE: $	2533	PROTOTYPE: $
2059	CODE:	2534	CODE:
…		…
2083	OUTPUT:	2558	OUTPUT:
2084	RETVAL	2559	RETVAL
2085		2560
2086	void	2561	void
2087	force_cctx ()	2562	force_cctx ()
		2563	PROTOTYPE:
2088	CODE:	2564	CODE:
2089	struct coro *coro = SvSTATE (coro_current);
2090	coro->cctx->idle_sp = 0;	2565	SvSTATE_current->cctx->idle_sp = 0;
2091		2566
2092	void	2567	void
2093	swap_defsv (Coro::State self)	2568	swap_defsv (Coro::State self)
2094	PROTOTYPE: $	2569	PROTOTYPE: $
2095	ALIAS:	2570	ALIAS:
2096	swap_defav = 1	2571	swap_defav = 1
2097	CODE:	2572	CODE:
2098	if (!self->slot)	2573	if (!self->slot)
2099	croak ("cannot swap state with coroutine that has no saved state");	2574	croak ("cannot swap state with coroutine that has no saved state,");
2100	else	2575	else
2101	{	2576	{
2102	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2577	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2103	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2578	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2104		2579
2105	SV *tmp = *src; *src = *dst; *dst = tmp;	2580	SV *tmp = *src; *src = *dst; *dst = tmp;
2106	}	2581	}
		2582
2107		2583
2108	MODULE = Coro::State PACKAGE = Coro	2584	MODULE = Coro::State PACKAGE = Coro
2109		2585
2110	BOOT:	2586	BOOT:
2111	{	2587	{
…		…
2129		2605
2130	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2606	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2131	coro_ready[i] = newAV ();	2607	coro_ready[i] = newAV ();
2132		2608
2133	{	2609	{
2134	SV *sv = perl_get_sv ("Coro::API", TRUE);	2610	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2135	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2136		2611
2137	coroapi.schedule = api_schedule;	2612	coroapi.schedule = api_schedule;
2138	coroapi.cede = api_cede;	2613	coroapi.cede = api_cede;
2139	coroapi.cede_notself = api_cede_notself;	2614	coroapi.cede_notself = api_cede_notself;
2140	coroapi.ready = api_ready;	2615	coroapi.ready = api_ready;
2141	coroapi.is_ready = api_is_ready;	2616	coroapi.is_ready = api_is_ready;
2142	coroapi.nready = &coro_nready;	2617	coroapi.nready = coro_nready;
2143	coroapi.current = coro_current;	2618	coroapi.current = coro_current;
2144		2619
2145	GCoroAPI = &coroapi;	2620	GCoroAPI = &coroapi;
2146	sv_setiv (sv, (IV)&coroapi);	2621	sv_setiv (sv, (IV)&coroapi);
2147	SvREADONLY_on (sv);	2622	SvREADONLY_on (sv);
2148	}	2623	}
2149	}	2624	}
		2625
		2626	void
		2627	schedule (...)
		2628	CODE:
		2629	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2630
		2631	void
		2632	cede (...)
		2633	CODE:
		2634	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2635
		2636	void
		2637	cede_notself (...)
		2638	CODE:
		2639	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2150		2640
2151	void	2641	void
2152	_set_current (SV *current)	2642	_set_current (SV *current)
2153	PROTOTYPE: $	2643	PROTOTYPE: $
2154	CODE:	2644	CODE:
…		…
2157		2647
2158	void	2648	void
2159	_set_readyhook (SV *hook)	2649	_set_readyhook (SV *hook)
2160	PROTOTYPE: $	2650	PROTOTYPE: $
2161	CODE:	2651	CODE:
2162	LOCK;
2163	SvREFCNT_dec (coro_readyhook);	2652	SvREFCNT_dec (coro_readyhook);
2164	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2653	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2165	UNLOCK;
2166		2654
2167	int	2655	int
2168	prio (Coro::State coro, int newprio = 0)	2656	prio (Coro::State coro, int newprio = 0)
		2657	PROTOTYPE: $;$
2169	ALIAS:	2658	ALIAS:
2170	nice = 1	2659	nice = 1
2171	CODE:	2660	CODE:
2172	{	2661	{
2173	RETVAL = coro->prio;	2662	RETVAL = coro->prio;
…		…
2188		2677
2189	SV *	2678	SV *
2190	ready (SV *self)	2679	ready (SV *self)
2191	PROTOTYPE: $	2680	PROTOTYPE: $
2192	CODE:	2681	CODE:
2193	RETVAL = boolSV (api_ready (self));	2682	RETVAL = boolSV (api_ready (aTHX_ self));
2194	OUTPUT:	2683	OUTPUT:
2195	RETVAL	2684	RETVAL
2196		2685
2197	int	2686	int
2198	nready (...)	2687	nready (...)
…		…
2200	CODE:	2689	CODE:
2201	RETVAL = coro_nready;	2690	RETVAL = coro_nready;
2202	OUTPUT:	2691	OUTPUT:
2203	RETVAL	2692	RETVAL
2204		2693
2205	void
2206	throw (Coro::State self, SV *throw = &PL_sv_undef)
2207	PROTOTYPE: $;$
2208	CODE:
2209	SvREFCNT_dec (self->throw);
2210	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2211
2212	# for async_pool speedup	2694	# for async_pool speedup
2213	void	2695	void
2214	_pool_1 (SV *cb)	2696	_pool_1 (SV *cb)
2215	CODE:	2697	CODE:
2216	{	2698	{
2217	struct coro *coro = SvSTATE (coro_current);
2218	HV *hv = (HV *)SvRV (coro_current);	2699	HV *hv = (HV *)SvRV (coro_current);
		2700	struct coro *coro = SvSTATE_hv ((SV *)hv);
2219	AV *defav = GvAV (PL_defgv);	2701	AV *defav = GvAV (PL_defgv);
2220	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2702	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2221	AV *invoke_av;	2703	AV *invoke_av;
2222	int i, len;	2704	int i, len;
2223		2705
…		…
2244	{	2726	{
2245	av_fill (defav, len - 1);	2727	av_fill (defav, len - 1);
2246	for (i = 0; i < len; ++i)	2728	for (i = 0; i < len; ++i)
2247	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2729	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2248	}	2730	}
2249
2250	SvREFCNT_dec (invoke);
2251	}	2731	}
2252		2732
2253	void	2733	void
2254	_pool_2 (SV *cb)	2734	_pool_2 (SV *cb)
2255	CODE:	2735	CODE:
2256	{	2736	{
2257	struct coro *coro = SvSTATE (coro_current);	2737	HV *hv = (HV *)SvRV (coro_current);
		2738	struct coro *coro = SvSTATE_hv ((SV *)hv);
2258		2739
2259	sv_setsv (cb, &PL_sv_undef);	2740	sv_setsv (cb, &PL_sv_undef);
2260		2741
2261	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2742	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2262	coro->saved_deffh = 0;	2743	coro->saved_deffh = 0;
…		…
2269	SvREFCNT_dec (old);	2750	SvREFCNT_dec (old);
2270	croak ("\3async_pool terminate\2\n");	2751	croak ("\3async_pool terminate\2\n");
2271	}	2752	}
2272		2753
2273	av_clear (GvAV (PL_defgv));	2754	av_clear (GvAV (PL_defgv));
2274	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2755	hv_store (hv, "desc", sizeof ("desc") - 1,
2275	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2756	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2276		2757
2277	coro->prio = 0;	2758	coro->prio = 0;
2278		2759
2279	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2760	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2280	api_trace (coro_current, 0);	2761	api_trace (aTHX_ coro_current, 0);
2281		2762
2282	av_push (av_async_pool, newSVsv (coro_current));	2763	av_push (av_async_pool, newSVsv (coro_current));
2283	}	2764	}
2284		2765
2285	#if 0
2286		2766
2287	void	2767	MODULE = Coro::State PACKAGE = PerlIO::cede
2288	_generator_call (...)	2768
2289	PROTOTYPE: @	2769	BOOT:
2290	PPCODE:	2770	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2291	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);	2771
2292	xxxx	2772
2293	abort ();	2773	MODULE = Coro::State PACKAGE = Coro::Semaphore
2294		2774
2295	SV *	2775	SV *
2296	gensub (SV *sub, ...)	2776	new (SV *klass, SV *count_ = 0)
2297	PROTOTYPE: &;@	2777	CODE:
2298	CODE:
2299	{	2778	{
2300	struct coro *coro;	2779	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2301	MAGIC *mg;	2780	AV *av = newAV ();
2302	CV *xcv;	2781	SV **ary;
2303	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2304	int i;
2305		2782
2306	CvGV (ncv) = CvGV (cv);	2783	/* unfortunately, building manually saves memory */
2307	CvFILE (ncv) = CvFILE (cv);	2784	Newx (ary, 2, SV *);
		2785	AvALLOC (av) = ary;
		2786	AvARRAY (av) = ary;
		2787	AvMAX (av) = 1;
		2788	AvFILLp (av) = 0;
		2789	ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2308		2790
2309	Newz (0, coro, 1, struct coro);	2791	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2310	coro->args = newAV ();
2311	coro->flags = CF_NEW;
2312
2313	av_extend (coro->args, items - 1);
2314	for (i = 1; i < items; i++)
2315	av_push (coro->args, newSVsv (ST (i)));
2316
2317	CvISXSUB_on (ncv);
2318	CvXSUBANY (ncv).any_ptr = (void *)coro;
2319
2320	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2321
2322	CvXSUB (ncv) = CvXSUB (xcv);
2323	CvANON_on (ncv);
2324
2325	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2326	RETVAL = newRV_noinc ((SV *)ncv);
2327	}	2792	}
2328	OUTPUT:	2793	OUTPUT:
2329	RETVAL	2794	RETVAL
2330		2795
2331	#endif	2796	SV *
2332		2797	count (SV *self)
2333		2798	CODE:
2334	MODULE = Coro::State PACKAGE = Coro::AIO	2799	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2800	OUTPUT:
		2801	RETVAL
2335		2802
2336	void	2803	void
2337	_get_state (SV *self)	2804	up (SV *self, int adjust = 1)
2338	PPCODE:	2805	ALIAS:
2339	{	2806	adjust = 1
2340	AV *defav = GvAV (PL_defgv);	2807	CODE:
2341	AV *av = newAV ();	2808	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2342	int i;
2343	SV *data_sv = newSV (sizeof (struct io_state));
2344	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2345	SvCUR_set (data_sv, sizeof (struct io_state));
2346	SvPOK_only (data_sv);
2347
2348	data->errorno = errno;
2349	data->laststype = PL_laststype;
2350	data->laststatval = PL_laststatval;
2351	data->statcache = PL_statcache;
2352
2353	av_extend (av, AvFILLp (defav) + 1 + 1);
2354
2355	for (i = 0; i <= AvFILLp (defav); ++i)
2356	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2357
2358	av_push (av, data_sv);
2359
2360	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2361
2362	api_ready (self);
2363	}
2364		2809
2365	void	2810	void
2366	_set_state (SV *state)	2811	down (SV *self)
2367	PROTOTYPE: $	2812	CODE:
2368	PPCODE:	2813	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2814
		2815	void
		2816	try (SV *self)
		2817	PPCODE:
2369	{	2818	{
2370	AV *av = (AV *)SvRV (state);	2819	AV *av = (AV *)SvRV (self);
2371	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);	2820	SV *count_sv = AvARRAY (av)[0];
		2821	IV count = SvIVX (count_sv);
		2822
		2823	if (count > 0)
		2824	{
		2825	--count;
		2826	SvIVX (count_sv) = count;
		2827	XSRETURN_YES;
		2828	}
		2829	else
		2830	XSRETURN_NO;
		2831	}
		2832
		2833	void
		2834	waiters (SV *self)
		2835	CODE:
		2836	{
		2837	AV *av = (AV *)SvRV (self);
		2838
		2839	if (GIMME_V == G_SCALAR)
		2840	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2841	else
		2842	{
2372	int i;	2843	int i;
2373
2374	errno = data->errorno;
2375	PL_laststype = data->laststype;
2376	PL_laststatval = data->laststatval;
2377	PL_statcache = data->statcache;
2378
2379	EXTEND (SP, AvFILLp (av));	2844	EXTEND (SP, AvFILLp (av) + 1 - 1);
2380	for (i = 0; i < AvFILLp (av); ++i)	2845	for (i = 1; i <= AvFILLp (av); ++i)
2381	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	2846	PUSHs (newSVsv (AvARRAY (av)[i]));
		2847	}
2382	}	2848	}
2383		2849
2384		2850
2385	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2851	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2386		2852
2387	BOOT:	2853	BOOT:
2388	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2854	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2389		2855
2390	SV *	2856	void
2391	_schedule (...)	2857	_schedule (...)
2392	PROTOTYPE: @
2393	CODE:	2858	CODE:
2394	{	2859	{
2395	static int incede;	2860	static int incede;
2396		2861
2397	api_cede_notself ();	2862	api_cede_notself (aTHX);
2398		2863
2399	++incede;	2864	++incede;
2400	while (coro_nready >= incede && api_cede ())	2865	while (coro_nready >= incede && api_cede (aTHX))
2401	;	2866	;
2402		2867
2403	sv_setsv (sv_activity, &PL_sv_undef);	2868	sv_setsv (sv_activity, &PL_sv_undef);
2404	if (coro_nready >= incede)	2869	if (coro_nready >= incede)
2405	{	2870	{
…		…
2411		2876
2412	--incede;	2877	--incede;
2413	}	2878	}
2414		2879
2415		2880
2416	MODULE = Coro::State PACKAGE = PerlIO::cede	2881	MODULE = Coro::State PACKAGE = Coro::AIO
2417		2882
2418	BOOT:	2883	void
2419	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2884	_register (char *target, char *proto, SV *req)
		2885	CODE:
		2886	{
		2887	HV *st;
		2888	GV *gvp;
		2889	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		2890	/* newXSproto doesn't return the CV on 5.8 */
		2891	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		2892	sv_setpv ((SV *)slf_cv, proto);
		2893	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		2894	}
		2895

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