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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.266 by root, Fri Nov 14 03:26:22 2008 UTC vs.
Revision 1.289 by root, Mon Nov 17 08:25:06 2008 UTC

…		…
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
…		…
116	# define CORO_PREFER_PERL_FUNCTIONS 0	119	# define CORO_PREFER_PERL_FUNCTIONS 0
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	#define dSTACKLEVEL volatile char stacklevel	124	#if __GNUC__ >= 4
122	#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
123		129
124	#define IN_DESTRUCT (PL_main_cv == Nullcv)	130	#define IN_DESTRUCT (PL_main_cv == Nullcv)
125		131
126	#if __GNUC__ >= 3	132	#if __GNUC__ >= 3
127	# define attribute(x) __attribute__(x)	133	# define attribute(x) __attribute__(x)
…		…
139	#define NOINLINE attribute ((noinline))	145	#define NOINLINE attribute ((noinline))
140		146
141	#include "CoroAPI.h"	147	#include "CoroAPI.h"
142		148
143	#ifdef USE_ITHREADS	149	#ifdef USE_ITHREADS
144
145	static perl_mutex coro_lock;
146	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148	# if CORO_PTHREAD	150	# if CORO_PTHREAD
149	static void *coro_thx;	151	static void *coro_thx;
150	# endif	152	# endif
151
152	#else
153
154	# define LOCK (void)0
155	# define UNLOCK (void)0
156
157	#endif	153	#endif
158
159	# undef LOCK
160	# define LOCK (void)0
161	# undef UNLOCK
162	# define UNLOCK (void)0
163
164	/* helper storage struct for Coro::AIO */
165	struct io_state
166	{
167	AV *res;
168	int errorno;
169	I32 laststype; /* U16 in 5.10.0 */
170	int laststatval;
171	Stat_t statcache;
172	};
173		154
174	static double (*nvtime)(); /* so why doesn't it take void? */	155	static double (*nvtime)(); /* so why doesn't it take void? */
175		156
176	static U32 cctx_gen;	157	static U32 cctx_gen;
177	static size_t cctx_stacksize = CORO_STACKSIZE;	158	static size_t cctx_stacksize = CORO_STACKSIZE;
178	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
179	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
180	static JMPENV *main_top_env;	161	static JMPENV *main_top_env;
181	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
182	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 */
183	static volatile struct coro *transfer_next;
184
185	struct transfer_args
186	{
187	struct coro *prev, *next;
188	};
189		164
190	static GV *irsgv; /* $/ */	165	static GV *irsgv; /* $/ */
191	static GV *stdoutgv; /* *STDOUT */	166	static GV *stdoutgv; /* *STDOUT */
192	static SV *rv_diehook;	167	static SV *rv_diehook;
193	static SV *rv_warnhook;	168	static SV *rv_warnhook;
…		…
212	CC_TRACE_LINE = 0x10, /* trace each statement */	187	CC_TRACE_LINE = 0x10, /* trace each statement */
213	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214	};	189	};
215		190
216	/* this is a structure representing a c-level coroutine */	191	/* this is a structure representing a c-level coroutine */
217	typedef struct coro_cctx {	192	typedef struct coro_cctx
		193	{
218	struct coro_cctx *next;	194	struct coro_cctx *next;
219		195
220	/* the stack */	196	/* the stack */
221	void *sptr;	197	void *sptr;
222	size_t ssize;	198	size_t ssize;
…		…
240	CF_NEW = 0x0004, /* has never been switched to */	216	CF_NEW = 0x0004, /* has never been switched to */
241	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	217	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242	};	218	};
243		219
244	/* 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 */
245	typedef struct {	221	typedef struct
		222	{
246	SV *defsv;	223	SV *defsv;
247	AV *defav;	224	AV *defav;
248	SV *errsv;	225	SV *errsv;
249	SV *irsgv;	226	SV *irsgv;
250	#define VAR(name,type) type name;	227	#define VAR(name,type) type name;
…		…
254		231
255	#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))
256		233
257	/* this is a structure representing a perl-level coroutine */	234	/* this is a structure representing a perl-level coroutine */
258	struct coro {	235	struct coro {
259	/* the c coroutine allocated to this perl coroutine, if any */	236	/* the C coroutine allocated to this perl coroutine, if any */
260	coro_cctx *cctx;	237	coro_cctx *cctx;
261		238
262	/* process data */	239	/* state data */
		240	struct CoroSLF slf_frame; /* saved slf frame */
263	AV *mainstack;	241	AV *mainstack;
264	perl_slots *slot; /* basically the saved sp */	242	perl_slots *slot; /* basically the saved sp */
265		243
266	AV *args; /* data associated with this coroutine (initial args) */	244	AV *args; /* data associated with this coroutine (initial args) */
267	int refcnt; /* coroutines are refcounted, yes */	245	int refcnt; /* coroutines are refcounted, yes */
268	int flags; /* CF_ flags */	246	int flags; /* CF_ flags */
269	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);
270		249
271	/* statistics */	250	/* statistics */
272	int usecount; /* number of transfers to this coro */	251	int usecount; /* number of transfers to this coro */
273		252
274	/* coro process data */	253	/* coro process data */
…		…
282	struct coro *next, *prev;	261	struct coro *next, *prev;
283	};	262	};
284		263
285	typedef struct coro *Coro__State;	264	typedef struct coro *Coro__State;
286	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;
287		272
288	/** Coro ********************************************************************/	273	/** Coro ********************************************************************/
289		274
290	#define PRIO_MAX 3	275	#define PRIO_MAX 3
291	#define PRIO_HIGH 1	276	#define PRIO_HIGH 1
…		…
296		281
297	/* for Coro.pm */	282	/* for Coro.pm */
298	static SV *coro_current;	283	static SV *coro_current;
299	static SV *coro_readyhook;	284	static SV *coro_readyhook;
300	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	285	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301	static int coro_nready;
302	static struct coro *coro_first;	286	static struct coro *coro_first;
		287	#define coro_nready coroapi.nready
303		288
304	/** lowlevel stuff **********************************************************/	289	/** lowlevel stuff **********************************************************/
305		290
306	static SV *	291	static SV *
307	coro_get_sv (pTHX_ const char *name, int create)	292	coro_get_sv (pTHX_ const char *name, int create)
…		…
392	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	377	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
393		378
394	return 0;	379	return 0;
395	}	380	}
396		381
397	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	382	#define CORO_MAGIC_type_cv 26
398	#define CORO_MAGIC_type_state PERL_MAGIC_ext	383	#define CORO_MAGIC_type_state PERL_MAGIC_ext
399		384
400	static MGVTBL coro_cv_vtbl = {	385	static MGVTBL coro_cv_vtbl = {
401	0, 0, 0, 0,	386	0, 0, 0, 0,
402	coro_cv_free	387	coro_cv_free
403	};	388	};
404		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
405	#define CORO_MAGIC(sv, type) \	395	#define CORO_MAGIC(sv, type) \
406	SvMAGIC (sv) \	396	(expect_true (SvMAGIC (sv)) \
407	? SvMAGIC (sv)->mg_type == type \	397	? CORO_MAGIC_NN (sv, type) \
408	? SvMAGIC (sv) \
409	: mg_find (sv, type) \
410	: 0	398	: 0)
411		399
412	#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)
413	#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)
414		402
415	INLINE struct coro *	403	INLINE struct coro *
416	SvSTATE_ (pTHX_ SV *coro)	404	SvSTATE_ (pTHX_ SV *coro)
417	{	405	{
418	HV *stash;	406	HV *stash;
…		…
435	mg = CORO_MAGIC_state (coro);	423	mg = CORO_MAGIC_state (coro);
436	return (struct coro *)mg->mg_ptr;	424	return (struct coro *)mg->mg_ptr;
437	}	425	}
438		426
439	#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))
440		432
441	/* the next two functions merely cache the padlists */	433	/* the next two functions merely cache the padlists */
442	static void	434	static void
443	get_padlist (pTHX_ CV *cv)	435	get_padlist (pTHX_ CV *cv)
444	{	436	{
…		…
511	CvPADLIST (cv) = (AV *)POPs;	503	CvPADLIST (cv) = (AV *)POPs;
512	}	504	}
513		505
514	PUTBACK;	506	PUTBACK;
515	}	507	}
		508
		509	slf_frame = c->slf_frame;
		510	coro_throw = c->throw;
516	}	511	}
517		512
518	static void	513	static void
519	save_perl (pTHX_ Coro__State c)	514	save_perl (pTHX_ Coro__State c)
520	{	515	{
		516	c->throw = coro_throw;
		517	c->slf_frame = slf_frame;
		518
521	{	519	{
522	dSP;	520	dSP;
523	I32 cxix = cxstack_ix;	521	I32 cxix = cxstack_ix;
524	PERL_CONTEXT *ccstk = cxstack;	522	PERL_CONTEXT *ccstk = cxstack;
525	PERL_SI *top_si = PL_curstackinfo;	523	PERL_SI *top_si = PL_curstackinfo;
…		…
592	#undef VAR	590	#undef VAR
593	}	591	}
594	}	592	}
595		593
596	/*	594	/*
597	* allocate various perl stacks. This is an exact copy	595	* allocate various perl stacks. This is almost an exact copy
598	* of perl.c:init_stacks, except that it uses less memory	596	* of perl.c:init_stacks, except that it uses less memory
599	* on the (sometimes correct) assumption that coroutines do	597	* on the (sometimes correct) assumption that coroutines do
600	* not usually need a lot of stackspace.	598	* not usually need a lot of stackspace.
601	*/	599	*/
602	#if CORO_PREFER_PERL_FUNCTIONS	600	#if CORO_PREFER_PERL_FUNCTIONS
…		…
709	#endif	707	#endif
710	}	708	}
711	}	709	}
712		710
713	return rss;	711	return rss;
714	}
715
716	/** set stacklevel support **************************************************/
717
718	/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719	#define SSL_HEAD (void)0
720	/* we somtimes need to create the effect of leaving via pp_set_stacklevel */
721	#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723	INLINE void
724	set_stacklevel_tail (pTHX)
725	{
726	dSP;
727	SV **bot = SP;
728
729	int gimme = GIMME_V;
730
731	/* make sure we put something on the stack in scalar context */
732	if (gimme == G_SCALAR)
733	{
734	if (sp == bot)
735	XPUSHs (&PL_sv_undef);
736
737	SP = bot + 1;
738	}
739
740	PUTBACK;
741	}	712	}
742		713
743	/** coroutine stack handling ************************************************/	714	/** coroutine stack handling ************************************************/
744		715
745	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);	716	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
…		…
831		802
832	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	803	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
833	}	804	}
834		805
835	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 */
836	coro_setup (pTHX_ struct coro *coro)	820	coro_setup (pTHX_ struct coro *coro)
837	{	821	{
838	/*	822	/*
839	* emulate part of the perl startup here.	823	* emulate part of the perl startup here.
840	*/	824	*/
…		…
879	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	863	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
880	SPAGAIN;	864	SPAGAIN;
881	}	865	}
882		866
883	/* 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
884	* likely was suspended in set_stacklevel, called from pp_set_stacklevel,	868	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
885	* so we have to emulate entering pp_set_stacklevel here.
886	*/	869	*/
887	SSL_HEAD;	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;
888	}	874	}
889		875
890	static void	876	static void
891	coro_destruct (pTHX_ struct coro *coro)	877	coro_destruct (pTHX_ struct coro *coro)
892	{	878	{
…		…
916		902
917	SvREFCNT_dec (PL_diehook);	903	SvREFCNT_dec (PL_diehook);
918	SvREFCNT_dec (PL_warnhook);	904	SvREFCNT_dec (PL_warnhook);
919		905
920	SvREFCNT_dec (coro->saved_deffh);	906	SvREFCNT_dec (coro->saved_deffh);
921	SvREFCNT_dec (coro->throw);	907	SvREFCNT_dec (coro_throw);
922		908
923	coro_destruct_stacks (aTHX);	909	coro_destruct_stacks (aTHX);
924	}	910	}
925		911
926	INLINE void	912	INLINE void
…		…
936	static int	922	static int
937	runops_trace (pTHX)	923	runops_trace (pTHX)
938	{	924	{
939	COP *oldcop = 0;	925	COP *oldcop = 0;
940	int oldcxix = -2;	926	int oldcxix = -2;
941	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 */
942	coro_cctx *cctx = coro->cctx;	928	coro_cctx *cctx = coro->cctx;
943		929
944	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	930	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
945	{	931	{
946	PERL_ASYNC_CHECK ();	932	PERL_ASYNC_CHECK ();
…		…
1056	TAINT_NOT;	1042	TAINT_NOT;
1057	return 0;	1043	return 0;
1058	}	1044	}
1059		1045
1060	static void	1046	static void
1061	prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)	1047	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1062	{	1048	{
1063	ta->prev = (struct coro *)cctx;	1049	ta->prev = (struct coro *)cctx;
1064	ta->next = 0;	1050	ta->next = 0;
1065	}	1051	}
1066		1052
…		…
1095		1081
1096	/* the tail of transfer: execute stuff we can only do after a transfer */	1082	/* the tail of transfer: execute stuff we can only do after a transfer */
1097	INLINE void	1083	INLINE void
1098	transfer_tail (pTHX)	1084	transfer_tail (pTHX)
1099	{	1085	{
1100	struct coro *next = (struct coro *)transfer_next;
1101	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1102	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1103
1104	free_coro_mortal (aTHX);	1086	free_coro_mortal (aTHX);
1105	UNLOCK;
1106
1107	if (expect_false (next->throw))
1108	{
1109	SV *exception = sv_2mortal (next->throw);
1110
1111	next->throw = 0;
1112	sv_setsv (ERRSV, exception);
1113	croak (0);
1114	}
1115	}	1087	}
1116		1088
1117	/*	1089	/*
1118	* this is a _very_ stripped down perl interpreter ;)	1090	* this is a _very_ stripped down perl interpreter ;)
1119	*/	1091	*/
…		…
1126	# endif	1098	# endif
1127	#endif	1099	#endif
1128	{	1100	{
1129	dTHX;	1101	dTHX;
1130		1102
1131	/* we are the alternative tail to pp_set_stacklevel */	1103	/* normally we would need to skip the entersub here */
1132	/* so do the same things here */	1104	/* not doing so will re-execute it, which is exactly what we want */
1133	SSL_TAIL;
1134
1135	/* we now skip the op that did lead to transfer() */
1136	PL_op = PL_op->op_next;	1105	/* PL_nop = PL_nop->op_next */
1137		1106
1138	/* inject a fake subroutine call to cctx_init */	1107	/* inject a fake subroutine call to cctx_init */
1139	cctx_prepare (aTHX_ (coro_cctx *)arg);	1108	cctx_prepare (aTHX_ (coro_cctx *)arg);
1140		1109
1141	/* cctx_run is the alternative tail of transfer() */	1110	/* cctx_run is the alternative tail of transfer() */
…		…
1302	/** coroutine switching *****************************************************/	1271	/** coroutine switching *****************************************************/
1303		1272
1304	static void	1273	static void
1305	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1274	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1306	{	1275	{
		1276	/* TODO: throwing up here is considered harmful */
		1277
1307	if (expect_true (prev != next))	1278	if (expect_true (prev != next))
1308	{	1279	{
1309	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1280	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1310	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,");
1311		1282
1312	if (expect_false (next->flags & CF_RUNNING))	1283	if (expect_false (next->flags & CF_RUNNING))
1313	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,");
1314		1285
1315	if (expect_false (next->flags & CF_DESTROYED))	1286	if (expect_false (next->flags & CF_DESTROYED))
1316	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,");
1317		1288
1318	#if !PERL_VERSION_ATLEAST (5,10,0)	1289	#if !PERL_VERSION_ATLEAST (5,10,0)
1319	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1290	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1320	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,");
1321	#endif	1292	#endif
1322	}	1293	}
1323	}	1294	}
1324		1295
1325	/* always use the TRANSFER macro */	1296	/* always use the TRANSFER macro */
1326	static void NOINLINE	1297	static void NOINLINE /* noinline so we have a fixed stackframe */
1327	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1298	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1328	{	1299	{
1329	dSTACKLEVEL;	1300	dSTACKLEVEL;
1330		1301
1331	/* sometimes transfer is only called to set idle_sp */	1302	/* sometimes transfer is only called to set idle_sp */
1332	if (expect_false (!next))	1303	if (expect_false (!next))
1333	{	1304	{
1334	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1305	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1335	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 */
1336	}	1307	}
1337	else if (expect_true (prev != next))	1308	else if (expect_true (prev != next))
1338	{	1309	{
1339	coro_cctx *prev__cctx;	1310	coro_cctx *prev__cctx;
…		…
1346	prev->flags |= CF_RUNNING;	1317	prev->flags |= CF_RUNNING;
1347	}	1318	}
1348		1319
1349	prev->flags &= ~CF_RUNNING;	1320	prev->flags &= ~CF_RUNNING;
1350	next->flags |= CF_RUNNING;	1321	next->flags |= CF_RUNNING;
1351
1352	LOCK;
1353		1322
1354	/* first get rid of the old state */	1323	/* first get rid of the old state */
1355	save_perl (aTHX_ prev);	1324	save_perl (aTHX_ prev);
1356		1325
1357	if (expect_false (next->flags & CF_NEW))	1326	if (expect_false (next->flags & CF_NEW))
…		…
1366		1335
1367	prev__cctx = prev->cctx;	1336	prev__cctx = prev->cctx;
1368		1337
1369	/* possibly untie and reuse the cctx */	1338	/* possibly untie and reuse the cctx */
1370	if (expect_true (	1339	if (expect_true (
1371	prev__cctx->idle_sp == STACKLEVEL	1340	prev__cctx->idle_sp == (void *)stacklevel
1372	&& !(prev__cctx->flags & CC_TRACE)	1341	&& !(prev__cctx->flags & CC_TRACE)
1373	&& !force_cctx	1342	&& !force_cctx
1374	))	1343	))
1375	{	1344	{
1376	/* 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 */
1377	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", 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));
1378		1347
1379	prev->cctx = 0;	1348	prev->cctx = 0;
1380		1349
1381	/* 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 */
…		…
1389		1358
1390	++next->usecount;	1359	++next->usecount;
1391		1360
1392	if (expect_true (!next->cctx))	1361	if (expect_true (!next->cctx))
1393	next->cctx = cctx_get (aTHX);	1362	next->cctx = cctx_get (aTHX);
1394
1395	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1396	transfer_next = next;
1397		1363
1398	if (expect_false (prev__cctx != next->cctx))	1364	if (expect_false (prev__cctx != next->cctx))
1399	{	1365	{
1400	prev__cctx->top_env = PL_top_env;	1366	prev__cctx->top_env = PL_top_env;
1401	PL_top_env = next->cctx->top_env;	1367	PL_top_env = next->cctx->top_env;
…		…
1415	coro_state_destroy (pTHX_ struct coro *coro)	1381	coro_state_destroy (pTHX_ struct coro *coro)
1416	{	1382	{
1417	if (coro->flags & CF_DESTROYED)	1383	if (coro->flags & CF_DESTROYED)
1418	return 0;	1384	return 0;
1419		1385
		1386	if (coro->on_destroy)
		1387	coro->on_destroy (aTHX_ coro);
		1388
1420	coro->flags |= CF_DESTROYED;	1389	coro->flags |= CF_DESTROYED;
1421		1390
1422	if (coro->flags & CF_READY)	1391	if (coro->flags & CF_READY)
1423	{	1392	{
1424	/* reduce nready, as destroying a ready coro effectively unreadies it */	1393	/* reduce nready, as destroying a ready coro effectively unreadies it */
1425	/* alternative: look through all ready queues and remove the coro */	1394	/* alternative: look through all ready queues and remove the coro */
1426	LOCK;
1427	--coro_nready;	1395	--coro_nready;
1428	UNLOCK;
1429	}	1396	}
1430	else	1397	else
1431	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 */
1432		1399
1433	if (coro->mainstack && coro->mainstack != main_mainstack)	1400	if (coro->mainstack && coro->mainstack != main_mainstack)
1434	{	1401	{
1435	struct coro temp;	1402	struct coro temp;
1436		1403
1437	if (coro->flags & CF_RUNNING)	1404	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1438	croak ("FATAL: tried to destroy currently running coroutine");
1439		1405
1440	save_perl (aTHX_ &temp);	1406	save_perl (aTHX_ &temp);
1441	load_perl (aTHX_ coro);	1407	load_perl (aTHX_ coro);
1442		1408
1443	coro_destruct (aTHX_ coro);	1409	coro_destruct (aTHX_ coro);
…		…
1494	# define MGf_DUP 0	1460	# define MGf_DUP 0
1495	#endif	1461	#endif
1496	};	1462	};
1497		1463
1498	static void	1464	static void
1499	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)
1500	{	1466	{
1501	ta->prev = SvSTATE (prev_sv);	1467	ta->prev = SvSTATE (prev_sv);
1502	ta->next = SvSTATE (next_sv);	1468	ta->next = SvSTATE (next_sv);
1503	TRANSFER_CHECK (*ta);	1469	TRANSFER_CHECK (*ta);
1504	}	1470	}
1505		1471
1506	static void	1472	static void
1507	api_transfer (SV *prev_sv, SV *next_sv)	1473	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1508	{	1474	{
1509	dTHX;
1510	struct transfer_args ta;	1475	struct coro_transfer_args ta;
1511		1476
1512	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1477	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1513	TRANSFER (ta, 1);	1478	TRANSFER (ta, 1);
1514	}	1479	}
1515		1480
1516	/** Coro ********************************************************************/	1481	/** Coro ********************************************************************/
1517		1482
1518	static void	1483	INLINE void
1519	coro_enq (pTHX_ SV *coro_sv)	1484	coro_enq (pTHX_ struct coro *coro)
1520	{	1485	{
1521	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));
1522	}	1487	}
1523		1488
1524	static SV *	1489	INLINE SV *
1525	coro_deq (pTHX)	1490	coro_deq (pTHX)
1526	{	1491	{
1527	int prio;	1492	int prio;
1528		1493
1529	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1494	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1532		1497
1533	return 0;	1498	return 0;
1534	}	1499	}
1535		1500
1536	static int	1501	static int
1537	api_ready (SV *coro_sv)	1502	api_ready (pTHX_ SV *coro_sv)
1538	{	1503	{
1539	dTHX;
1540	struct coro *coro;	1504	struct coro *coro;
1541	SV *sv_hook;	1505	SV *sv_hook;
1542	void (*xs_hook)(void);	1506	void (*xs_hook)(void);
1543		1507
1544	if (SvROK (coro_sv))	1508	if (SvROK (coro_sv))
…		…
1549	if (coro->flags & CF_READY)	1513	if (coro->flags & CF_READY)
1550	return 0;	1514	return 0;
1551		1515
1552	coro->flags |= CF_READY;	1516	coro->flags |= CF_READY;
1553		1517
1554	LOCK;
1555
1556	sv_hook = coro_nready ? 0 : coro_readyhook;	1518	sv_hook = coro_nready ? 0 : coro_readyhook;
1557	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1519	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1558		1520
1559	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1521	coro_enq (aTHX_ coro);
1560	++coro_nready;	1522	++coro_nready;
1561		1523
1562	UNLOCK;
1563
1564	if (sv_hook)	1524	if (sv_hook)
1565	{	1525	{
1566	dSP;	1526	dSP;
1567		1527
1568	ENTER;	1528	ENTER;
…		…
1582		1542
1583	return 1;	1543	return 1;
1584	}	1544	}
1585		1545
1586	static int	1546	static int
1587	api_is_ready (SV *coro_sv)	1547	api_is_ready (pTHX_ SV *coro_sv)
1588	{	1548	{
1589	dTHX;
1590
1591	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1549	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1592	}	1550	}
1593		1551
1594	INLINE void	1552	INLINE void
1595	prepare_schedule (pTHX_ struct transfer_args *ta)	1553	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1596	{	1554	{
1597	SV *prev_sv, *next_sv;	1555	SV *prev_sv, *next_sv;
1598		1556
1599	for (;;)	1557	for (;;)
1600	{	1558	{
1601	LOCK;
1602	next_sv = coro_deq (aTHX);	1559	next_sv = coro_deq (aTHX);
1603		1560
1604	/* nothing to schedule: call the idle handler */	1561	/* nothing to schedule: call the idle handler */
1605	if (expect_false (!next_sv))	1562	if (expect_false (!next_sv))
1606	{	1563	{
1607	dSP;	1564	dSP;
1608	UNLOCK;
1609		1565
1610	ENTER;	1566	ENTER;
1611	SAVETMPS;	1567	SAVETMPS;
1612		1568
1613	PUSHMARK (SP);	1569	PUSHMARK (SP);
…		…
1618	FREETMPS;	1574	FREETMPS;
1619	LEAVE;	1575	LEAVE;
1620	continue;	1576	continue;
1621	}	1577	}
1622		1578
1623	ta->next = SvSTATE (next_sv);	1579	ta->next = SvSTATE_hv (next_sv);
1624		1580
1625	/* cannot transfer to destroyed coros, skip and look for next */	1581	/* cannot transfer to destroyed coros, skip and look for next */
1626	if (expect_false (ta->next->flags & CF_DESTROYED))	1582	if (expect_false (ta->next->flags & CF_DESTROYED))
1627	{	1583	{
1628	UNLOCK;
1629	SvREFCNT_dec (next_sv);	1584	SvREFCNT_dec (next_sv);
1630	/* coro_nready has already been taken care of by destroy */	1585	/* coro_nready has already been taken care of by destroy */
1631	continue;	1586	continue;
1632	}	1587	}
1633		1588
1634	--coro_nready;	1589	--coro_nready;
1635	UNLOCK;
1636	break;	1590	break;
1637	}	1591	}
1638		1592
1639	/* free this only after the transfer */	1593	/* free this only after the transfer */
1640	prev_sv = SvRV (coro_current);	1594	prev_sv = SvRV (coro_current);
1641	ta->prev = SvSTATE (prev_sv);	1595	ta->prev = SvSTATE_hv (prev_sv);
1642	TRANSFER_CHECK (*ta);	1596	TRANSFER_CHECK (*ta);
1643	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1597	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1644	ta->next->flags &= ~CF_READY;	1598	ta->next->flags &= ~CF_READY;
1645	SvRV_set (coro_current, next_sv);	1599	SvRV_set (coro_current, next_sv);
1646		1600
1647	LOCK;
1648	free_coro_mortal (aTHX);	1601	free_coro_mortal (aTHX);
1649	coro_mortal = prev_sv;	1602	coro_mortal = prev_sv;
1650	UNLOCK;
1651	}	1603	}
1652		1604
1653	INLINE void	1605	INLINE void
1654	prepare_cede (pTHX_ struct transfer_args *ta)	1606	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1655	{	1607	{
1656	api_ready (coro_current);	1608	api_ready (aTHX_ coro_current);
1657	prepare_schedule (aTHX_ ta);	1609	prepare_schedule (aTHX_ ta);
1658	}	1610	}
1659		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
1660	static int	1635	static int
1661	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1636	api_cede (pTHX)
1662	{	1637	{
1663	if (coro_nready)	1638	struct coro_transfer_args ta;
1664	{	1639
1665	SV *prev = SvRV (coro_current);
1666	prepare_schedule (aTHX_ ta);	1640	prepare_cede (aTHX_ &ta);
1667	api_ready (prev);	1641
		1642	if (expect_true (ta.prev != ta.next))
		1643	{
		1644	TRANSFER (ta, 1);
1668	return 1;	1645	return 1;
1669	}	1646	}
1670	else	1647	else
1671	return 0;	1648	return 0;
1672	}	1649	}
1673		1650
1674	static void
1675	api_schedule (void)
1676	{
1677	dTHX;
1678	struct transfer_args ta;
1679
1680	prepare_schedule (aTHX_ &ta);
1681	TRANSFER (ta, 1);
1682	}
1683
1684	static int	1651	static int
1685	api_cede (void)	1652	api_cede_notself (pTHX)
1686	{	1653	{
1687	dTHX;	1654	if (coro_nready)
		1655	{
1688	struct transfer_args ta;	1656	struct coro_transfer_args ta;
1689		1657
1690	prepare_cede (aTHX_ &ta);	1658	prepare_cede_notself (aTHX_ &ta);
1691
1692	if (expect_true (ta.prev != ta.next))
1693	{
1694	TRANSFER (ta, 1);	1659	TRANSFER (ta, 1);
1695	return 1;	1660	return 1;
1696	}	1661	}
1697	else	1662	else
1698	return 0;	1663	return 0;
1699	}	1664	}
1700		1665
1701	static int	1666	static void
1702	api_cede_notself (void)
1703	{
1704	dTHX;
1705	struct transfer_args ta;
1706
1707	if (prepare_cede_notself (aTHX_ &ta))
1708	{
1709	TRANSFER (ta, 1);
1710	return 1;
1711	}
1712	else
1713	return 0;
1714	}
1715
1716	static void
1717	api_trace (SV *coro_sv, int flags)	1667	api_trace (pTHX_ SV *coro_sv, int flags)
1718	{	1668	{
1719	dTHX;
1720	struct coro *coro = SvSTATE (coro_sv);	1669	struct coro *coro = SvSTATE (coro_sv);
1721		1670
1722	if (flags & CC_TRACE)	1671	if (flags & CC_TRACE)
1723	{	1672	{
1724	if (!coro->cctx)	1673	if (!coro->cctx)
1725	coro->cctx = cctx_new_run ();	1674	coro->cctx = cctx_new_run ();
1726	else if (!(coro->cctx->flags & CC_TRACE))	1675	else if (!(coro->cctx->flags & CC_TRACE))
1727	croak ("cannot enable tracing on coroutine with custom stack");	1676	croak ("cannot enable tracing on coroutine with custom stack,");
1728		1677
1729	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1678	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1730	}	1679	}
1731	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1680	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1732	{	1681	{
…		…
1737	else	1686	else
1738	coro->slot->runops = RUNOPS_DEFAULT;	1687	coro->slot->runops = RUNOPS_DEFAULT;
1739	}	1688	}
1740	}	1689	}
1741		1690
1742	#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
1743	static int	1721	static void
1744	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1722	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1745	{	1723	{
1746	AV *padlist;	1724	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1747	AV *av = (AV *)mg->mg_obj;
1748
1749	abort ();
1750
1751	return 0;
1752	}	1725	}
1753		1726
1754	static MGVTBL coro_gensub_vtbl = {	1727	static void
1755	0, 0, 0, 0,	1728	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1756	coro_gensub_free	1729	{
1757	};	1730	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1758	#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	}
1759		1924
1760	/*****************************************************************************/	1925	/*****************************************************************************/
1761	/* PerlIO::cede */	1926	/* PerlIO::cede */
1762		1927
1763	typedef struct	1928	typedef struct
…		…
1791	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1956	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1792	double now = nvtime ();	1957	double now = nvtime ();
1793		1958
1794	if (now >= self->next)	1959	if (now >= self->next)
1795	{	1960	{
1796	api_cede ();	1961	api_cede (aTHX);
1797	self->next = now + self->every;	1962	self->next = now + self->every;
1798	}	1963	}
1799		1964
1800	return PerlIOBuf_flush (aTHX_ f);	1965	return PerlIOBuf_flush (aTHX_ f);
1801	}	1966	}
…		…
1831	PerlIOBuf_get_cnt,	1996	PerlIOBuf_get_cnt,
1832	PerlIOBuf_set_ptrcnt,	1997	PerlIOBuf_set_ptrcnt,
1833	};	1998	};
1834		1999
1835	/*****************************************************************************/	2000	/*****************************************************************************/
		2001	/* Coro::Semaphore */
1836		2002
1837	static const CV *ssl_cv; /* for quick consistency check */	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);
1838		2008
1839	static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */	2009	count += adjust;
1840	static SV *ssl_arg0;	2010	SvIVX (count_sv) = count;
1841	static SV *ssl_arg1;
1842		2011
1843	/* this restores the stack in the case we patched the entersub, to */	2012	/* now wake up as many waiters as are expected to lock */
1844	/* recreate the stack frame as perl will on following calls */	2013	while (count > 0 && AvFILLp (av) > 0)
1845	/* since entersub cleared the stack */	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 */
1846	static OP *	2104	static SV *
1847	pp_restore (pTHX)	2105	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1848	{	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	{
1849	dSP;	2195	dSP;
		2196	int i;
1850		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
1851	PUSHMARK (SP);	2246	PUSHMARK (SP);
1852		2247
1853	EXTEND (SP, 3);	2248	/* first push all args to the stack */
1854	if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;	2249	EXTEND (SP, items + 1);
1855	if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1856	PUSHs ((SV *)CvGV (ssl_cv));
1857		2250
1858	RETURNOP (ssl_restore.op_first);	2251	for (i = 0; i < items; ++i)
1859	}	2252	PUSHs (arg [i]);
1860		2253
1861	/* declare prototype */	2254	/* now push the callback closure */
1862	XS(XS_Coro__State__set_stacklevel);	2255	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1863		2256
1864	#define OPpENTERSUB_SSL 15	2257	/* now call the AIO function - we assume our request is uncancelable */
1865
1866	static OP *
1867	pp_set_stacklevel (pTHX)
1868	{
1869	dSP;
1870	struct transfer_args ta;
1871	SV **arg = PL_stack_base + TOPMARK + 1;
1872	int items = SP - arg; /* args without function object */
1873
1874	/* do a quick consistency check on the "function" object, and if it isn't */
1875	/* for us, divert to the real entersub */
1876	if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1877	return PL_ppaddr[OP_ENTERSUB](aTHX);
1878
1879	/* pop args */
1880	SP = PL_stack_base + POPMARK;
1881
1882	if (!(PL_op->op_flags & OPf_STACKED))
1883	{
1884	/* ampersand-form of call, use @_ instead of stack */
1885	AV *av = GvAV (PL_defgv);
1886	arg = AvARRAY (av);
1887	items = AvFILLp (av) + 1;
1888	}
1889
1890	PUTBACK;	2258	PUTBACK;
1891	switch (PL_op->op_private & OPpENTERSUB_SSL)	2259	call_sv ((SV *)req, G_VOID | G_DISCARD);
1892	{
1893	case 0:
1894	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1895	break;
1896
1897	case 1:
1898	if (items != 2)
1899	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1900
1901	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1902	break;
1903
1904	case 2:
1905	prepare_schedule (aTHX_ &ta);
1906	break;
1907
1908	case 3:
1909	prepare_cede (aTHX_ &ta);
1910	break;
1911
1912	case 4:
1913	if (!prepare_cede_notself (aTHX_ &ta))
1914	goto skip;
1915
1916	break;
1917	}	2260	}
1918		2261
1919	TRANSFER (ta, 0);	2262	/* now that the requets is going, we loop toll we have a result */
1920	SPAGAIN;	2263	frame->data = (void *)state;
1921		2264	frame->prepare = prepare_schedule;
1922	skip:	2265	frame->check = slf_check_aio_req;
1923	PUTBACK;
1924	SSL_TAIL;
1925	SPAGAIN;
1926	RETURN;
1927	}	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	/*****************************************************************************/
1928		2279
1929	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2280	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1930		2281
1931	PROTOTYPES: DISABLE	2282	PROTOTYPES: DISABLE
1932		2283
1933	# these not obviously related functions are all rolled into the same xs
1934	# function to increase chances that they all will call transfer with the same
1935	# stack offset
1936	void
1937	_set_stacklevel (...)
1938	ALIAS:
1939	Coro::State::transfer = 1
1940	Coro::schedule = 2
1941	Coro::cede = 3
1942	Coro::cede_notself = 4
1943	CODE:
1944	{
1945	assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1946
1947	assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));
1948	ssl_cv = cv;
1949
1950	/* we patch the op, and then re-run the whole call */
1951	/* we have to put some dummy argument on the stack for this to work */
1952	ssl_restore.op_next = (OP *)&ssl_restore;
1953	ssl_restore.op_type = OP_NULL;
1954	ssl_restore.op_ppaddr = pp_restore;
1955	ssl_restore.op_first = PL_op;
1956
1957	ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1958	ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1959
1960	PL_op->op_ppaddr = pp_set_stacklevel;
1961	PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
1962
1963	PL_op = (OP *)&ssl_restore;
1964	}
1965
1966	BOOT:	2284	BOOT:
1967	{	2285	{
1968	#ifdef USE_ITHREADS	2286	#ifdef USE_ITHREADS
1969	MUTEX_INIT (&coro_lock);
1970	# if CORO_PTHREAD	2287	# if CORO_PTHREAD
1971	coro_thx = PERL_GET_CONTEXT;	2288	coro_thx = PERL_GET_CONTEXT;
1972	# endif	2289	# endif
1973	#endif	2290	#endif
1974	BOOT_PAGESIZE;	2291	BOOT_PAGESIZE;
…		…
1995	main_top_env = PL_top_env;	2312	main_top_env = PL_top_env;
1996		2313
1997	while (main_top_env->je_prev)	2314	while (main_top_env->je_prev)
1998	main_top_env = main_top_env->je_prev;	2315	main_top_env = main_top_env->je_prev;
1999		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
2000	coroapi.ver = CORO_API_VERSION;	2329	coroapi.ver = CORO_API_VERSION;
2001	coroapi.rev = CORO_API_REVISION;	2330	coroapi.rev = CORO_API_REVISION;
		2331
2002	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;
2003		2340
2004	{	2341	{
2005	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2342	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2006		2343
2007	if (!svp) croak ("Time::HiRes is required");	2344	if (!svp) croak ("Time::HiRes is required");
…		…
2039	for (i = 1; i < items; i++)	2376	for (i = 1; i < items; i++)
2040	av_push (coro->args, newSVsv (ST (i)));	2377	av_push (coro->args, newSVsv (ST (i)));
2041	}	2378	}
2042	OUTPUT:	2379	OUTPUT:
2043	RETVAL	2380	RETVAL
		2381
		2382	void
		2383	_set_stacklevel (...)
		2384	CODE:
		2385	CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
		2386
		2387	void
		2388	transfer (...)
		2389	PROTOTYPE: $$
		2390	CODE:
		2391	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2044		2392
2045	bool	2393	bool
2046	_destroy (SV *coro_sv)	2394	_destroy (SV *coro_sv)
2047	CODE:	2395	CODE:
2048	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2396	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2055	CODE:	2403	CODE:
2056	_exit (code);	2404	_exit (code);
2057		2405
2058	int	2406	int
2059	cctx_stacksize (int new_stacksize = 0)	2407	cctx_stacksize (int new_stacksize = 0)
		2408	PROTOTYPE: ;$
2060	CODE:	2409	CODE:
2061	RETVAL = cctx_stacksize;	2410	RETVAL = cctx_stacksize;
2062	if (new_stacksize)	2411	if (new_stacksize)
2063	{	2412	{
2064	cctx_stacksize = new_stacksize;	2413	cctx_stacksize = new_stacksize;
…		…
2067	OUTPUT:	2416	OUTPUT:
2068	RETVAL	2417	RETVAL
2069		2418
2070	int	2419	int
2071	cctx_max_idle (int max_idle = 0)	2420	cctx_max_idle (int max_idle = 0)
		2421	PROTOTYPE: ;$
2072	CODE:	2422	CODE:
2073	RETVAL = cctx_max_idle;	2423	RETVAL = cctx_max_idle;
2074	if (max_idle > 1)	2424	if (max_idle > 1)
2075	cctx_max_idle = max_idle;	2425	cctx_max_idle = max_idle;
2076	OUTPUT:	2426	OUTPUT:
2077	RETVAL	2427	RETVAL
2078		2428
2079	int	2429	int
2080	cctx_count ()	2430	cctx_count ()
		2431	PROTOTYPE:
2081	CODE:	2432	CODE:
2082	RETVAL = cctx_count;	2433	RETVAL = cctx_count;
2083	OUTPUT:	2434	OUTPUT:
2084	RETVAL	2435	RETVAL
2085		2436
2086	int	2437	int
2087	cctx_idle ()	2438	cctx_idle ()
		2439	PROTOTYPE:
2088	CODE:	2440	CODE:
2089	RETVAL = cctx_idle;	2441	RETVAL = cctx_idle;
2090	OUTPUT:	2442	OUTPUT:
2091	RETVAL	2443	RETVAL
2092		2444
2093	void	2445	void
2094	list ()	2446	list ()
		2447	PROTOTYPE:
2095	PPCODE:	2448	PPCODE:
2096	{	2449	{
2097	struct coro *coro;	2450	struct coro *coro;
2098	for (coro = coro_first; coro; coro = coro->next)	2451	for (coro = coro_first; coro; coro = coro->next)
2099	if (coro->hv)	2452	if (coro->hv)
…		…
2161		2514
2162	void	2515	void
2163	throw (Coro::State self, SV *throw = &PL_sv_undef)	2516	throw (Coro::State self, SV *throw = &PL_sv_undef)
2164	PROTOTYPE: $;$	2517	PROTOTYPE: $;$
2165	CODE:	2518	CODE:
		2519	{
		2520	struct coro *current = SvSTATE_current;
		2521	SV **throwp = self == current ? &coro_throw : &self->throw;
2166	SvREFCNT_dec (self->throw);	2522	SvREFCNT_dec (*throwp);
2167	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2523	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2524	}
2168		2525
2169	void	2526	void
2170	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
2171		2530
2172	SV *	2531	SV *
2173	has_cctx (Coro::State coro)	2532	has_cctx (Coro::State coro)
2174	PROTOTYPE: $	2533	PROTOTYPE: $
2175	CODE:	2534	CODE:
…		…
2199	OUTPUT:	2558	OUTPUT:
2200	RETVAL	2559	RETVAL
2201		2560
2202	void	2561	void
2203	force_cctx ()	2562	force_cctx ()
		2563	PROTOTYPE:
2204	CODE:	2564	CODE:
2205	struct coro *coro = SvSTATE (coro_current);
2206	coro->cctx->idle_sp = 0;	2565	SvSTATE_current->cctx->idle_sp = 0;
2207		2566
2208	void	2567	void
2209	swap_defsv (Coro::State self)	2568	swap_defsv (Coro::State self)
2210	PROTOTYPE: $	2569	PROTOTYPE: $
2211	ALIAS:	2570	ALIAS:
2212	swap_defav = 1	2571	swap_defav = 1
2213	CODE:	2572	CODE:
2214	if (!self->slot)	2573	if (!self->slot)
2215	croak ("cannot swap state with coroutine that has no saved state");	2574	croak ("cannot swap state with coroutine that has no saved state,");
2216	else	2575	else
2217	{	2576	{
2218	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2577	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2219	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2578	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2220		2579
2221	SV *tmp = *src; *src = *dst; *dst = tmp;	2580	SV *tmp = *src; *src = *dst; *dst = tmp;
2222	}	2581	}
		2582
2223		2583
2224	MODULE = Coro::State PACKAGE = Coro	2584	MODULE = Coro::State PACKAGE = Coro
2225		2585
2226	BOOT:	2586	BOOT:
2227	{	2587	{
…		…
2252	coroapi.schedule = api_schedule;	2612	coroapi.schedule = api_schedule;
2253	coroapi.cede = api_cede;	2613	coroapi.cede = api_cede;
2254	coroapi.cede_notself = api_cede_notself;	2614	coroapi.cede_notself = api_cede_notself;
2255	coroapi.ready = api_ready;	2615	coroapi.ready = api_ready;
2256	coroapi.is_ready = api_is_ready;	2616	coroapi.is_ready = api_is_ready;
2257	coroapi.nready = &coro_nready;	2617	coroapi.nready = coro_nready;
2258	coroapi.current = coro_current;	2618	coroapi.current = coro_current;
2259		2619
2260	GCoroAPI = &coroapi;	2620	GCoroAPI = &coroapi;
2261	sv_setiv (sv, (IV)&coroapi);	2621	sv_setiv (sv, (IV)&coroapi);
2262	SvREADONLY_on (sv);	2622	SvREADONLY_on (sv);
2263	}	2623	}
2264	}	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);
2265		2640
2266	void	2641	void
2267	_set_current (SV *current)	2642	_set_current (SV *current)
2268	PROTOTYPE: $	2643	PROTOTYPE: $
2269	CODE:	2644	CODE:
…		…
2272		2647
2273	void	2648	void
2274	_set_readyhook (SV *hook)	2649	_set_readyhook (SV *hook)
2275	PROTOTYPE: $	2650	PROTOTYPE: $
2276	CODE:	2651	CODE:
2277	LOCK;
2278	SvREFCNT_dec (coro_readyhook);	2652	SvREFCNT_dec (coro_readyhook);
2279	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2653	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2280	UNLOCK;
2281		2654
2282	int	2655	int
2283	prio (Coro::State coro, int newprio = 0)	2656	prio (Coro::State coro, int newprio = 0)
		2657	PROTOTYPE: $;$
2284	ALIAS:	2658	ALIAS:
2285	nice = 1	2659	nice = 1
2286	CODE:	2660	CODE:
2287	{	2661	{
2288	RETVAL = coro->prio;	2662	RETVAL = coro->prio;
…		…
2303		2677
2304	SV *	2678	SV *
2305	ready (SV *self)	2679	ready (SV *self)
2306	PROTOTYPE: $	2680	PROTOTYPE: $
2307	CODE:	2681	CODE:
2308	RETVAL = boolSV (api_ready (self));	2682	RETVAL = boolSV (api_ready (aTHX_ self));
2309	OUTPUT:	2683	OUTPUT:
2310	RETVAL	2684	RETVAL
2311		2685
2312	int	2686	int
2313	nready (...)	2687	nready (...)
…		…
2320	# for async_pool speedup	2694	# for async_pool speedup
2321	void	2695	void
2322	_pool_1 (SV *cb)	2696	_pool_1 (SV *cb)
2323	CODE:	2697	CODE:
2324	{	2698	{
2325	struct coro *coro = SvSTATE (coro_current);
2326	HV *hv = (HV *)SvRV (coro_current);	2699	HV *hv = (HV *)SvRV (coro_current);
		2700	struct coro *coro = SvSTATE_hv ((SV *)hv);
2327	AV *defav = GvAV (PL_defgv);	2701	AV *defav = GvAV (PL_defgv);
2328	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2702	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2329	AV *invoke_av;	2703	AV *invoke_av;
2330	int i, len;	2704	int i, len;
2331		2705
…		…
2352	{	2726	{
2353	av_fill (defav, len - 1);	2727	av_fill (defav, len - 1);
2354	for (i = 0; i < len; ++i)	2728	for (i = 0; i < len; ++i)
2355	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]));
2356	}	2730	}
2357
2358	SvREFCNT_dec (invoke);
2359	}	2731	}
2360		2732
2361	void	2733	void
2362	_pool_2 (SV *cb)	2734	_pool_2 (SV *cb)
2363	CODE:	2735	CODE:
2364	{	2736	{
2365	struct coro *coro = SvSTATE (coro_current);	2737	HV *hv = (HV *)SvRV (coro_current);
		2738	struct coro *coro = SvSTATE_hv ((SV *)hv);
2366		2739
2367	sv_setsv (cb, &PL_sv_undef);	2740	sv_setsv (cb, &PL_sv_undef);
2368		2741
2369	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2742	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2370	coro->saved_deffh = 0;	2743	coro->saved_deffh = 0;
…		…
2377	SvREFCNT_dec (old);	2750	SvREFCNT_dec (old);
2378	croak ("\3async_pool terminate\2\n");	2751	croak ("\3async_pool terminate\2\n");
2379	}	2752	}
2380		2753
2381	av_clear (GvAV (PL_defgv));	2754	av_clear (GvAV (PL_defgv));
2382	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2755	hv_store (hv, "desc", sizeof ("desc") - 1,
2383	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2756	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2384		2757
2385	coro->prio = 0;	2758	coro->prio = 0;
2386		2759
2387	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2760	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2388	api_trace (coro_current, 0);	2761	api_trace (aTHX_ coro_current, 0);
2389		2762
2390	av_push (av_async_pool, newSVsv (coro_current));	2763	av_push (av_async_pool, newSVsv (coro_current));
2391	}	2764	}
2392		2765
2393	#if 0
2394		2766
2395	void	2767	MODULE = Coro::State PACKAGE = PerlIO::cede
2396	_generator_call (...)	2768
2397	PROTOTYPE: @	2769	BOOT:
2398	PPCODE:	2770	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2399	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);	2771
2400	xxxx	2772
2401	abort ();	2773	MODULE = Coro::State PACKAGE = Coro::Semaphore
2402		2774
2403	SV *	2775	SV *
2404	gensub (SV *sub, ...)	2776	new (SV *klass, SV *count_ = 0)
2405	PROTOTYPE: &;@	2777	CODE:
2406	CODE:
2407	{	2778	{
2408	struct coro *coro;	2779	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2409	MAGIC *mg;	2780	AV *av = newAV ();
2410	CV *xcv;	2781	SV **ary;
2411	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2412	int i;
2413		2782
2414	CvGV (ncv) = CvGV (cv);	2783	/* unfortunately, building manually saves memory */
2415	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);
2416		2790
2417	Newz (0, coro, 1, struct coro);	2791	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2418	coro->args = newAV ();
2419	coro->flags = CF_NEW;
2420
2421	av_extend (coro->args, items - 1);
2422	for (i = 1; i < items; i++)
2423	av_push (coro->args, newSVsv (ST (i)));
2424
2425	CvISXSUB_on (ncv);
2426	CvXSUBANY (ncv).any_ptr = (void *)coro;
2427
2428	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2429
2430	CvXSUB (ncv) = CvXSUB (xcv);
2431	CvANON_on (ncv);
2432
2433	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2434	RETVAL = newRV_noinc ((SV *)ncv);
2435	}	2792	}
2436	OUTPUT:	2793	OUTPUT:
2437	RETVAL	2794	RETVAL
2438		2795
2439	#endif	2796	SV *
2440		2797	count (SV *self)
2441		2798	CODE:
2442	MODULE = Coro::State PACKAGE = Coro::AIO	2799	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2800	OUTPUT:
		2801	RETVAL
2443		2802
2444	void	2803	void
2445	_get_state (SV *self)	2804	up (SV *self, int adjust = 1)
2446	PPCODE:	2805	ALIAS:
2447	{	2806	adjust = 1
2448	AV *defav = GvAV (PL_defgv);	2807	CODE:
2449	AV *av = newAV ();	2808	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2450	int i;
2451	SV *data_sv = newSV (sizeof (struct io_state));
2452	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2453	SvCUR_set (data_sv, sizeof (struct io_state));
2454	SvPOK_only (data_sv);
2455
2456	data->errorno = errno;
2457	data->laststype = PL_laststype;
2458	data->laststatval = PL_laststatval;
2459	data->statcache = PL_statcache;
2460
2461	av_extend (av, AvFILLp (defav) + 1 + 1);
2462
2463	for (i = 0; i <= AvFILLp (defav); ++i)
2464	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2465
2466	av_push (av, data_sv);
2467
2468	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2469
2470	api_ready (self);
2471	}
2472		2809
2473	void	2810	void
2474	_set_state (SV *state)	2811	down (SV *self)
2475	PROTOTYPE: $	2812	CODE:
2476	PPCODE:	2813	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2814
		2815	void
		2816	try (SV *self)
		2817	PPCODE:
2477	{	2818	{
2478	AV *av = (AV *)SvRV (state);	2819	AV *av = (AV *)SvRV (self);
2479	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	{
2480	int i;	2843	int i;
2481
2482	errno = data->errorno;
2483	PL_laststype = data->laststype;
2484	PL_laststatval = data->laststatval;
2485	PL_statcache = data->statcache;
2486
2487	EXTEND (SP, AvFILLp (av));	2844	EXTEND (SP, AvFILLp (av) + 1 - 1);
2488	for (i = 0; i < AvFILLp (av); ++i)	2845	for (i = 1; i <= AvFILLp (av); ++i)
2489	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	2846	PUSHs (newSVsv (AvARRAY (av)[i]));
		2847	}
2490	}	2848	}
2491		2849
2492		2850
2493	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2851	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2494		2852
2495	BOOT:	2853	BOOT:
2496	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2854	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2497		2855
2498	SV *	2856	void
2499	_schedule (...)	2857	_schedule (...)
2500	PROTOTYPE: @
2501	CODE:	2858	CODE:
2502	{	2859	{
2503	static int incede;	2860	static int incede;
2504		2861
2505	api_cede_notself ();	2862	api_cede_notself (aTHX);
2506		2863
2507	++incede;	2864	++incede;
2508	while (coro_nready >= incede && api_cede ())	2865	while (coro_nready >= incede && api_cede (aTHX))
2509	;	2866	;
2510		2867
2511	sv_setsv (sv_activity, &PL_sv_undef);	2868	sv_setsv (sv_activity, &PL_sv_undef);
2512	if (coro_nready >= incede)	2869	if (coro_nready >= incede)
2513	{	2870	{
…		…
2519		2876
2520	--incede;	2877	--incede;
2521	}	2878	}
2522		2879
2523		2880
2524	MODULE = Coro::State PACKAGE = PerlIO::cede	2881	MODULE = Coro::State PACKAGE = Coro::AIO
2525		2882
2526	BOOT:	2883	void
2527	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	}
2528		2895

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