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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.267 by root, Fri Nov 14 06:29:52 2008 UTC vs.
Revision 1.285 by root, Mon Nov 17 04:17:20 2008 UTC

…		…
116	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
117	#endif	117	#endif
118		118
119	/* The next macros try to return the current stack pointer, in an as	119	/* The next macros try to return the current stack pointer, in an as
120	* portable way as possible. */	120	* portable way as possible. */
121	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
122	#define STACKLEVEL ((void *)&stacklevel)	122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
		123	#else
		124	# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
		125	#endif
123		126
124	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
125		128
126	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
127	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
…		…
139	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
140		143
141	#include "CoroAPI.h"	144	#include "CoroAPI.h"
142		145
143	#ifdef USE_ITHREADS	146	#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	147	# if CORO_PTHREAD
149	static void *coro_thx;	148	static void *coro_thx;
150	# endif	149	# endif
151
152	#else
153
154	# define LOCK (void)0
155	# define UNLOCK (void)0
156
157	#endif	150	#endif
158
159	# undef LOCK
160	# define LOCK (void)0
161	# undef UNLOCK
162	# define UNLOCK (void)0
163		151
164	/* helper storage struct for Coro::AIO */	152	/* helper storage struct for Coro::AIO */
165	struct io_state	153	struct io_state
166	{	154	{
167	AV *res;	155	AV *res;
…		…
178	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
179	static AV *main_mainstack; /* used to differentiate between $main and others */	167	static AV *main_mainstack; /* used to differentiate between $main and others */
180	static JMPENV *main_top_env;	168	static JMPENV *main_top_env;
181	static HV *coro_state_stash, *coro_stash;	169	static HV *coro_state_stash, *coro_stash;
182	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */	170	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183	static volatile struct coro *transfer_next;
184
185	struct transfer_args
186	{
187	struct coro *prev, *next;
188	};
189		171
190	static GV *irsgv; /* $/ */	172	static GV *irsgv; /* $/ */
191	static GV *stdoutgv; /* *STDOUT */	173	static GV *stdoutgv; /* *STDOUT */
192	static SV *rv_diehook;	174	static SV *rv_diehook;
193	static SV *rv_warnhook;	175	static SV *rv_warnhook;
…		…
212	CC_TRACE_LINE = 0x10, /* trace each statement */	194	CC_TRACE_LINE = 0x10, /* trace each statement */
213	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	195	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214	};	196	};
215		197
216	/* this is a structure representing a c-level coroutine */	198	/* this is a structure representing a c-level coroutine */
217	typedef struct coro_cctx {	199	typedef struct coro_cctx
		200	{
218	struct coro_cctx *next;	201	struct coro_cctx *next;
219		202
220	/* the stack */	203	/* the stack */
221	void *sptr;	204	void *sptr;
222	size_t ssize;	205	size_t ssize;
…		…
240	CF_NEW = 0x0004, /* has never been switched to */	223	CF_NEW = 0x0004, /* has never been switched to */
241	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	224	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242	};	225	};
243		226
244	/* the structure where most of the perl state is stored, overlaid on the cxstack */	227	/* the structure where most of the perl state is stored, overlaid on the cxstack */
245	typedef struct {	228	typedef struct
		229	{
246	SV *defsv;	230	SV *defsv;
247	AV *defav;	231	AV *defav;
248	SV *errsv;	232	SV *errsv;
249	SV *irsgv;	233	SV *irsgv;
250	#define VAR(name,type) type name;	234	#define VAR(name,type) type name;
…		…
254		238
255	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	239	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256		240
257	/* this is a structure representing a perl-level coroutine */	241	/* this is a structure representing a perl-level coroutine */
258	struct coro {	242	struct coro {
259	/* the c coroutine allocated to this perl coroutine, if any */	243	/* the C coroutine allocated to this perl coroutine, if any */
260	coro_cctx *cctx;	244	coro_cctx *cctx;
261		245
262	/* process data */	246	/* state data */
		247	struct CoroSLF slf_frame; /* saved slf frame */
263	AV *mainstack;	248	AV *mainstack;
264	perl_slots *slot; /* basically the saved sp */	249	perl_slots *slot; /* basically the saved sp */
265		250
266	AV *args; /* data associated with this coroutine (initial args) */	251	AV *args; /* data associated with this coroutine (initial args) */
267	int refcnt; /* coroutines are refcounted, yes */	252	int refcnt; /* coroutines are refcounted, yes */
268	int flags; /* CF_ flags */	253	int flags; /* CF_ flags */
269	HV *hv; /* the perl hash associated with this coro, if any */	254	HV *hv; /* the perl hash associated with this coro, if any */
		255	void (*on_destroy)(pTHX_ struct coro *coro);
270		256
271	/* statistics */	257	/* statistics */
272	int usecount; /* number of transfers to this coro */	258	int usecount; /* number of transfers to this coro */
273		259
274	/* coro process data */	260	/* coro process data */
…		…
282	struct coro *next, *prev;	268	struct coro *next, *prev;
283	};	269	};
284		270
285	typedef struct coro *Coro__State;	271	typedef struct coro *Coro__State;
286	typedef struct coro *Coro__State_or_hashref;	272	typedef struct coro *Coro__State_or_hashref;
		273
		274	/* the following variables are effectively part of the perl context */
		275	/* and get copied between struct coro and these variables */
		276	/* the mainr easonw e don't support windows process emulation */
		277	static struct CoroSLF slf_frame; /* the current slf frame */
		278	static SV *coro_throw;
287		279
288	/** Coro ********************************************************************/	280	/** Coro ********************************************************************/
289		281
290	#define PRIO_MAX 3	282	#define PRIO_MAX 3
291	#define PRIO_HIGH 1	283	#define PRIO_HIGH 1
…		…
296		288
297	/* for Coro.pm */	289	/* for Coro.pm */
298	static SV *coro_current;	290	static SV *coro_current;
299	static SV *coro_readyhook;	291	static SV *coro_readyhook;
300	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	292	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301	static int coro_nready;
302	static struct coro *coro_first;	293	static struct coro *coro_first;
		294	#define coro_nready coroapi.nready
303		295
304	/** lowlevel stuff **********************************************************/	296	/** lowlevel stuff **********************************************************/
305		297
306	static SV *	298	static SV *
307	coro_get_sv (pTHX_ const char *name, int create)	299	coro_get_sv (pTHX_ const char *name, int create)
…		…
400	static MGVTBL coro_cv_vtbl = {	392	static MGVTBL coro_cv_vtbl = {
401	0, 0, 0, 0,	393	0, 0, 0, 0,
402	coro_cv_free	394	coro_cv_free
403	};	395	};
404		396
405	#define CORO_MAGIC(sv, type) \	397	#define CORO_MAGIC(sv, type) \
406	SvMAGIC (sv) \	398	expect_true (SvMAGIC (sv)) \
407	? SvMAGIC (sv)->mg_type == type \	399	? expect_true (SvMAGIC (sv)->mg_type == type) \
408	? SvMAGIC (sv) \	400	? SvMAGIC (sv) \
409	: mg_find (sv, type) \	401	: mg_find (sv, type) \
410	: 0	402	: 0
411		403
412	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	404	#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)	405	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414		406
…		…
435	mg = CORO_MAGIC_state (coro);	427	mg = CORO_MAGIC_state (coro);
436	return (struct coro *)mg->mg_ptr;	428	return (struct coro *)mg->mg_ptr;
437	}	429	}
438		430
439	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	431	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		432
		433	/* fastert than SvSTATE, but expects a coroutine hv */
		434	INLINE struct coro *
		435	SvSTATE_hv (SV *sv)
		436	{
		437	MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
		438	? SvMAGIC (sv)
		439	: mg_find (sv, CORO_MAGIC_type_state);
		440
		441	return (struct coro *)mg->mg_ptr;
		442	}
		443
		444	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
440		445
441	/* the next two functions merely cache the padlists */	446	/* the next two functions merely cache the padlists */
442	static void	447	static void
443	get_padlist (pTHX_ CV *cv)	448	get_padlist (pTHX_ CV *cv)
444	{	449	{
…		…
511	CvPADLIST (cv) = (AV *)POPs;	516	CvPADLIST (cv) = (AV *)POPs;
512	}	517	}
513		518
514	PUTBACK;	519	PUTBACK;
515	}	520	}
		521
		522	slf_frame = c->slf_frame;
		523	coro_throw = c->throw;
516	}	524	}
517		525
518	static void	526	static void
519	save_perl (pTHX_ Coro__State c)	527	save_perl (pTHX_ Coro__State c)
520	{	528	{
		529	c->throw = coro_throw;
		530	c->slf_frame = slf_frame;
		531
521	{	532	{
522	dSP;	533	dSP;
523	I32 cxix = cxstack_ix;	534	I32 cxix = cxstack_ix;
524	PERL_CONTEXT *ccstk = cxstack;	535	PERL_CONTEXT *ccstk = cxstack;
525	PERL_SI *top_si = PL_curstackinfo;	536	PERL_SI *top_si = PL_curstackinfo;
…		…
592	#undef VAR	603	#undef VAR
593	}	604	}
594	}	605	}
595		606
596	/*	607	/*
597	* allocate various perl stacks. This is an exact copy	608	* allocate various perl stacks. This is almost an exact copy
598	* of perl.c:init_stacks, except that it uses less memory	609	* of perl.c:init_stacks, except that it uses less memory
599	* on the (sometimes correct) assumption that coroutines do	610	* on the (sometimes correct) assumption that coroutines do
600	* not usually need a lot of stackspace.	611	* not usually need a lot of stackspace.
601	*/	612	*/
602	#if CORO_PREFER_PERL_FUNCTIONS	613	#if CORO_PREFER_PERL_FUNCTIONS
…		…
709	#endif	720	#endif
710	}	721	}
711	}	722	}
712		723
713	return rss;	724	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 sometimes 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	}	725	}
742		726
743	/** coroutine stack handling ************************************************/	727	/** coroutine stack handling ************************************************/
744		728
745	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);	729	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
…		…
831		815
832	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	816	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
833	}	817	}
834		818
835	static void	819	static void
		820	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		821	{
		822	/* kind of mega-hacky, but works */
		823	ta->next = ta->prev = (struct coro *)ta;
		824	}
		825
		826	static int
		827	slf_check_nop (pTHX_ struct CoroSLF *frame)
		828	{
		829	return 0;
		830	}
		831
		832	static void NOINLINE /* noinline to keep it out of the transfer fast path */
836	coro_setup (pTHX_ struct coro *coro)	833	coro_setup (pTHX_ struct coro *coro)
837	{	834	{
838	/*	835	/*
839	* emulate part of the perl startup here.	836	* emulate part of the perl startup here.
840	*/	837	*/
…		…
879	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	876	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
880	SPAGAIN;	877	SPAGAIN;
881	}	878	}
882		879
883	/* this newly created coroutine might be run on an existing cctx which most	880	/* 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,	881	* 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	*/	882	*/
887	SSL_HEAD;	883	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		884	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		885
		886	coro_throw = coro->throw;
888	}	887	}
889		888
890	static void	889	static void
891	coro_destruct (pTHX_ struct coro *coro)	890	coro_destruct (pTHX_ struct coro *coro)
892	{	891	{
…		…
916		915
917	SvREFCNT_dec (PL_diehook);	916	SvREFCNT_dec (PL_diehook);
918	SvREFCNT_dec (PL_warnhook);	917	SvREFCNT_dec (PL_warnhook);
919		918
920	SvREFCNT_dec (coro->saved_deffh);	919	SvREFCNT_dec (coro->saved_deffh);
921	SvREFCNT_dec (coro->throw);	920	SvREFCNT_dec (coro_throw);
922		921
923	coro_destruct_stacks (aTHX);	922	coro_destruct_stacks (aTHX);
924	}	923	}
925		924
926	INLINE void	925	INLINE void
…		…
936	static int	935	static int
937	runops_trace (pTHX)	936	runops_trace (pTHX)
938	{	937	{
939	COP *oldcop = 0;	938	COP *oldcop = 0;
940	int oldcxix = -2;	939	int oldcxix = -2;
941	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	940	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
942	coro_cctx *cctx = coro->cctx;	941	coro_cctx *cctx = coro->cctx;
943		942
944	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	943	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
945	{	944	{
946	PERL_ASYNC_CHECK ();	945	PERL_ASYNC_CHECK ();
…		…
1056	TAINT_NOT;	1055	TAINT_NOT;
1057	return 0;	1056	return 0;
1058	}	1057	}
1059		1058
1060	static void	1059	static void
1061	prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)	1060	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1062	{	1061	{
1063	ta->prev = (struct coro *)cctx;	1062	ta->prev = (struct coro *)cctx;
1064	ta->next = 0;	1063	ta->next = 0;
1065	}	1064	}
1066		1065
…		…
1095		1094
1096	/* the tail of transfer: execute stuff we can only do after a transfer */	1095	/* the tail of transfer: execute stuff we can only do after a transfer */
1097	INLINE void	1096	INLINE void
1098	transfer_tail (pTHX)	1097	transfer_tail (pTHX)
1099	{	1098	{
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);	1099	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	}	1100	}
1116		1101
1117	/*	1102	/*
1118	* this is a _very_ stripped down perl interpreter ;)	1103	* this is a _very_ stripped down perl interpreter ;)
1119	*/	1104	*/
…		…
1126	# endif	1111	# endif
1127	#endif	1112	#endif
1128	{	1113	{
1129	dTHX;	1114	dTHX;
1130		1115
1131	/* we are the alternative tail to pp_set_stacklevel */	1116	/* normally we would need to skip the entersub here */
1132	/* so do the same things here */	1117	/* 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;	1118	/* PL_nop = PL_nop->op_next */
1137		1119
1138	/* inject a fake subroutine call to cctx_init */	1120	/* inject a fake subroutine call to cctx_init */
1139	cctx_prepare (aTHX_ (coro_cctx *)arg);	1121	cctx_prepare (aTHX_ (coro_cctx *)arg);
1140		1122
1141	/* cctx_run is the alternative tail of transfer() */	1123	/* cctx_run is the alternative tail of transfer() */
…		…
1302	/** coroutine switching *****************************************************/	1284	/** coroutine switching *****************************************************/
1303		1285
1304	static void	1286	static void
1305	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1287	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1306	{	1288	{
		1289	/* TODO: throwing up here is considered harmful */
		1290
1307	if (expect_true (prev != next))	1291	if (expect_true (prev != next))
1308	{	1292	{
1309	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1293	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");	1294	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1311		1295
1312	if (expect_false (next->flags & CF_RUNNING))	1296	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");	1297	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1314		1298
1315	if (expect_false (next->flags & CF_DESTROYED))	1299	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");	1300	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1317		1301
1318	#if !PERL_VERSION_ATLEAST (5,10,0)	1302	#if !PERL_VERSION_ATLEAST (5,10,0)
1319	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1303	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");	1304	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1321	#endif	1305	#endif
1322	}	1306	}
1323	}	1307	}
1324		1308
1325	/* always use the TRANSFER macro */	1309	/* always use the TRANSFER macro */
1326	static void NOINLINE	1310	static void NOINLINE /* noinline so we have a fixed stackframe */
1327	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1311	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1328	{	1312	{
1329	dSTACKLEVEL;	1313	dSTACKLEVEL;
1330		1314
1331	/* sometimes transfer is only called to set idle_sp */	1315	/* sometimes transfer is only called to set idle_sp */
1332	if (expect_false (!next))	1316	if (expect_false (!next))
1333	{	1317	{
1334	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1318	((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 */	1319	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1336	}	1320	}
1337	else if (expect_true (prev != next))	1321	else if (expect_true (prev != next))
1338	{	1322	{
1339	coro_cctx *prev__cctx;	1323	coro_cctx *prev__cctx;
…		…
1346	prev->flags |= CF_RUNNING;	1330	prev->flags |= CF_RUNNING;
1347	}	1331	}
1348		1332
1349	prev->flags &= ~CF_RUNNING;	1333	prev->flags &= ~CF_RUNNING;
1350	next->flags |= CF_RUNNING;	1334	next->flags |= CF_RUNNING;
1351
1352	LOCK;
1353		1335
1354	/* first get rid of the old state */	1336	/* first get rid of the old state */
1355	save_perl (aTHX_ prev);	1337	save_perl (aTHX_ prev);
1356		1338
1357	if (expect_false (next->flags & CF_NEW))	1339	if (expect_false (next->flags & CF_NEW))
…		…
1366		1348
1367	prev__cctx = prev->cctx;	1349	prev__cctx = prev->cctx;
1368		1350
1369	/* possibly untie and reuse the cctx */	1351	/* possibly untie and reuse the cctx */
1370	if (expect_true (	1352	if (expect_true (
1371	prev__cctx->idle_sp == STACKLEVEL	1353	prev__cctx->idle_sp == (void *)stacklevel
1372	&& !(prev__cctx->flags & CC_TRACE)	1354	&& !(prev__cctx->flags & CC_TRACE)
1373	&& !force_cctx	1355	&& !force_cctx
1374	))	1356	))
1375	{	1357	{
1376	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1358	/* 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));	1359	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1378		1360
1379	prev->cctx = 0;	1361	prev->cctx = 0;
1380		1362
1381	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1363	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
…		…
1389		1371
1390	++next->usecount;	1372	++next->usecount;
1391		1373
1392	if (expect_true (!next->cctx))	1374	if (expect_true (!next->cctx))
1393	next->cctx = cctx_get (aTHX);	1375	next->cctx = cctx_get (aTHX);
1394
1395	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1396	transfer_next = next;
1397		1376
1398	if (expect_false (prev__cctx != next->cctx))	1377	if (expect_false (prev__cctx != next->cctx))
1399	{	1378	{
1400	prev__cctx->top_env = PL_top_env;	1379	prev__cctx->top_env = PL_top_env;
1401	PL_top_env = next->cctx->top_env;	1380	PL_top_env = next->cctx->top_env;
…		…
1415	coro_state_destroy (pTHX_ struct coro *coro)	1394	coro_state_destroy (pTHX_ struct coro *coro)
1416	{	1395	{
1417	if (coro->flags & CF_DESTROYED)	1396	if (coro->flags & CF_DESTROYED)
1418	return 0;	1397	return 0;
1419		1398
		1399	if (coro->on_destroy)
		1400	coro->on_destroy (aTHX_ coro);
		1401
1420	coro->flags |= CF_DESTROYED;	1402	coro->flags |= CF_DESTROYED;
1421		1403
1422	if (coro->flags & CF_READY)	1404	if (coro->flags & CF_READY)
1423	{	1405	{
1424	/* reduce nready, as destroying a ready coro effectively unreadies it */	1406	/* reduce nready, as destroying a ready coro effectively unreadies it */
1425	/* alternative: look through all ready queues and remove the coro */	1407	/* alternative: look through all ready queues and remove the coro */
1426	LOCK;
1427	--coro_nready;	1408	--coro_nready;
1428	UNLOCK;
1429	}	1409	}
1430	else	1410	else
1431	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1411	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1432		1412
1433	if (coro->mainstack && coro->mainstack != main_mainstack)	1413	if (coro->mainstack && coro->mainstack != main_mainstack)
1434	{	1414	{
1435	struct coro temp;	1415	struct coro temp;
1436		1416
1437	if (coro->flags & CF_RUNNING)	1417	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1438	croak ("FATAL: tried to destroy currently running coroutine");
1439		1418
1440	save_perl (aTHX_ &temp);	1419	save_perl (aTHX_ &temp);
1441	load_perl (aTHX_ coro);	1420	load_perl (aTHX_ coro);
1442		1421
1443	coro_destruct (aTHX_ coro);	1422	coro_destruct (aTHX_ coro);
…		…
1494	# define MGf_DUP 0	1473	# define MGf_DUP 0
1495	#endif	1474	#endif
1496	};	1475	};
1497		1476
1498	static void	1477	static void
1499	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1478	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1500	{	1479	{
1501	ta->prev = SvSTATE (prev_sv);	1480	ta->prev = SvSTATE (prev_sv);
1502	ta->next = SvSTATE (next_sv);	1481	ta->next = SvSTATE (next_sv);
1503	TRANSFER_CHECK (*ta);	1482	TRANSFER_CHECK (*ta);
1504	}	1483	}
1505		1484
1506	static void	1485	static void
1507	api_transfer (SV *prev_sv, SV *next_sv)	1486	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1508	{	1487	{
1509	dTHX;
1510	struct transfer_args ta;	1488	struct coro_transfer_args ta;
1511		1489
1512	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1490	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1513	TRANSFER (ta, 1);	1491	TRANSFER (ta, 1);
1514	}	1492	}
1515		1493
1516	/** Coro ********************************************************************/	1494	/** Coro ********************************************************************/
1517		1495
1518	static void	1496	INLINE void
1519	coro_enq (pTHX_ SV *coro_sv)	1497	coro_enq (pTHX_ struct coro *coro)
1520	{	1498	{
1521	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1499	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1522	}	1500	}
1523		1501
1524	static SV *	1502	INLINE SV *
1525	coro_deq (pTHX)	1503	coro_deq (pTHX)
1526	{	1504	{
1527	int prio;	1505	int prio;
1528		1506
1529	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1507	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1532		1510
1533	return 0;	1511	return 0;
1534	}	1512	}
1535		1513
1536	static int	1514	static int
1537	api_ready (SV *coro_sv)	1515	api_ready (pTHX_ SV *coro_sv)
1538	{	1516	{
1539	dTHX;
1540	struct coro *coro;	1517	struct coro *coro;
1541	SV *sv_hook;	1518	SV *sv_hook;
1542	void (*xs_hook)(void);	1519	void (*xs_hook)(void);
1543		1520
1544	if (SvROK (coro_sv))	1521	if (SvROK (coro_sv))
…		…
1549	if (coro->flags & CF_READY)	1526	if (coro->flags & CF_READY)
1550	return 0;	1527	return 0;
1551		1528
1552	coro->flags |= CF_READY;	1529	coro->flags |= CF_READY;
1553		1530
1554	LOCK;
1555
1556	sv_hook = coro_nready ? 0 : coro_readyhook;	1531	sv_hook = coro_nready ? 0 : coro_readyhook;
1557	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1532	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1558		1533
1559	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1534	coro_enq (aTHX_ coro);
1560	++coro_nready;	1535	++coro_nready;
1561		1536
1562	UNLOCK;
1563
1564	if (sv_hook)	1537	if (sv_hook)
1565	{	1538	{
1566	dSP;	1539	dSP;
1567		1540
1568	ENTER;	1541	ENTER;
…		…
1582		1555
1583	return 1;	1556	return 1;
1584	}	1557	}
1585		1558
1586	static int	1559	static int
1587	api_is_ready (SV *coro_sv)	1560	api_is_ready (pTHX_ SV *coro_sv)
1588	{	1561	{
1589	dTHX;
1590
1591	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1562	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1592	}	1563	}
1593		1564
1594	INLINE void	1565	INLINE void
1595	prepare_schedule (pTHX_ struct transfer_args *ta)	1566	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1596	{	1567	{
1597	SV *prev_sv, *next_sv;	1568	SV *prev_sv, *next_sv;
1598		1569
1599	for (;;)	1570	for (;;)
1600	{	1571	{
1601	LOCK;
1602	next_sv = coro_deq (aTHX);	1572	next_sv = coro_deq (aTHX);
1603		1573
1604	/* nothing to schedule: call the idle handler */	1574	/* nothing to schedule: call the idle handler */
1605	if (expect_false (!next_sv))	1575	if (expect_false (!next_sv))
1606	{	1576	{
1607	dSP;	1577	dSP;
1608	UNLOCK;
1609		1578
1610	ENTER;	1579	ENTER;
1611	SAVETMPS;	1580	SAVETMPS;
1612		1581
1613	PUSHMARK (SP);	1582	PUSHMARK (SP);
…		…
1618	FREETMPS;	1587	FREETMPS;
1619	LEAVE;	1588	LEAVE;
1620	continue;	1589	continue;
1621	}	1590	}
1622		1591
1623	ta->next = SvSTATE (next_sv);	1592	ta->next = SvSTATE_hv (next_sv);
1624		1593
1625	/* cannot transfer to destroyed coros, skip and look for next */	1594	/* cannot transfer to destroyed coros, skip and look for next */
1626	if (expect_false (ta->next->flags & CF_DESTROYED))	1595	if (expect_false (ta->next->flags & CF_DESTROYED))
1627	{	1596	{
1628	UNLOCK;
1629	SvREFCNT_dec (next_sv);	1597	SvREFCNT_dec (next_sv);
1630	/* coro_nready has already been taken care of by destroy */	1598	/* coro_nready has already been taken care of by destroy */
1631	continue;	1599	continue;
1632	}	1600	}
1633		1601
1634	--coro_nready;	1602	--coro_nready;
1635	UNLOCK;
1636	break;	1603	break;
1637	}	1604	}
1638		1605
1639	/* free this only after the transfer */	1606	/* free this only after the transfer */
1640	prev_sv = SvRV (coro_current);	1607	prev_sv = SvRV (coro_current);
1641	ta->prev = SvSTATE (prev_sv);	1608	ta->prev = SvSTATE_hv (prev_sv);
1642	TRANSFER_CHECK (*ta);	1609	TRANSFER_CHECK (*ta);
1643	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1610	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1644	ta->next->flags &= ~CF_READY;	1611	ta->next->flags &= ~CF_READY;
1645	SvRV_set (coro_current, next_sv);	1612	SvRV_set (coro_current, next_sv);
1646		1613
1647	LOCK;
1648	free_coro_mortal (aTHX);	1614	free_coro_mortal (aTHX);
1649	coro_mortal = prev_sv;	1615	coro_mortal = prev_sv;
1650	UNLOCK;
1651	}	1616	}
1652		1617
1653	INLINE void	1618	INLINE void
1654	prepare_cede (pTHX_ struct transfer_args *ta)	1619	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1655	{	1620	{
1656	api_ready (coro_current);	1621	api_ready (aTHX_ coro_current);
1657	prepare_schedule (aTHX_ ta);	1622	prepare_schedule (aTHX_ ta);
1658	}	1623	}
1659		1624
1660	static void	1625	INLINE void
1661	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1626	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1662	{	1627	{
1663	SV *prev = SvRV (coro_current);	1628	SV *prev = SvRV (coro_current);
1664		1629
1665	if (coro_nready)	1630	if (coro_nready)
1666	{	1631	{
1667	prepare_schedule (aTHX_ ta);	1632	prepare_schedule (aTHX_ ta);
1668	api_ready (prev);	1633	api_ready (aTHX_ prev);
1669	}	1634	}
1670	else	1635	else
1671	ta->prev = ta->next = SvSTATE (prev);	1636	prepare_nop (aTHX_ ta);
1672	}	1637	}
1673		1638
1674	static void	1639	static void
1675	api_schedule (void)	1640	api_schedule (pTHX)
1676	{	1641	{
1677	dTHX;
1678	struct transfer_args ta;	1642	struct coro_transfer_args ta;
1679		1643
1680	prepare_schedule (aTHX_ &ta);	1644	prepare_schedule (aTHX_ &ta);
1681	TRANSFER (ta, 1);	1645	TRANSFER (ta, 1);
1682	}	1646	}
1683		1647
1684	static int	1648	static int
1685	api_cede (void)	1649	api_cede (pTHX)
1686	{	1650	{
1687	dTHX;
1688	struct transfer_args ta;	1651	struct coro_transfer_args ta;
1689		1652
1690	prepare_cede (aTHX_ &ta);	1653	prepare_cede (aTHX_ &ta);
1691		1654
1692	if (expect_true (ta.prev != ta.next))	1655	if (expect_true (ta.prev != ta.next))
1693	{	1656	{
…		…
1697	else	1660	else
1698	return 0;	1661	return 0;
1699	}	1662	}
1700		1663
1701	static int	1664	static int
1702	api_cede_notself (void)	1665	api_cede_notself (pTHX)
1703	{	1666	{
1704	if (coro_nready)	1667	if (coro_nready)
1705	{	1668	{
1706	dTHX;
1707	struct transfer_args ta;	1669	struct coro_transfer_args ta;
1708		1670
1709	prepare_cede_notself (aTHX_ &ta);	1671	prepare_cede_notself (aTHX_ &ta);
1710	TRANSFER (ta, 1);	1672	TRANSFER (ta, 1);
1711	return 1;	1673	return 1;
1712	}	1674	}
1713	else	1675	else
1714	return 0;	1676	return 0;
1715	}	1677	}
1716		1678
1717	static void	1679	static void
1718	api_trace (SV *coro_sv, int flags)	1680	api_trace (pTHX_ SV *coro_sv, int flags)
1719	{	1681	{
1720	dTHX;
1721	struct coro *coro = SvSTATE (coro_sv);	1682	struct coro *coro = SvSTATE (coro_sv);
1722		1683
1723	if (flags & CC_TRACE)	1684	if (flags & CC_TRACE)
1724	{	1685	{
1725	if (!coro->cctx)	1686	if (!coro->cctx)
1726	coro->cctx = cctx_new_run ();	1687	coro->cctx = cctx_new_run ();
1727	else if (!(coro->cctx->flags & CC_TRACE))	1688	else if (!(coro->cctx->flags & CC_TRACE))
1728	croak ("cannot enable tracing on coroutine with custom stack");	1689	croak ("cannot enable tracing on coroutine with custom stack,");
1729		1690
1730	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1691	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1731	}	1692	}
1732	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1693	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1733	{	1694	{
…		…
1738	else	1699	else
1739	coro->slot->runops = RUNOPS_DEFAULT;	1700	coro->slot->runops = RUNOPS_DEFAULT;
1740	}	1701	}
1741	}	1702	}
1742		1703
1743	#if 0
1744	static int
1745	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1746	{
1747	AV *padlist;
1748	AV *av = (AV *)mg->mg_obj;
1749
1750	abort ();
1751
1752	return 0;
1753	}
1754
1755	static MGVTBL coro_gensub_vtbl = {
1756	0, 0, 0, 0,
1757	coro_gensub_free
1758	};
1759	#endif
1760
1761	/*****************************************************************************/	1704	/*****************************************************************************/
1762	/* PerlIO::cede */	1705	/* PerlIO::cede */
1763		1706
1764	typedef struct	1707	typedef struct
1765	{	1708	{
…		…
1792	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1735	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1793	double now = nvtime ();	1736	double now = nvtime ();
1794		1737
1795	if (now >= self->next)	1738	if (now >= self->next)
1796	{	1739	{
1797	api_cede ();	1740	api_cede (aTHX);
1798	self->next = now + self->every;	1741	self->next = now + self->every;
1799	}	1742	}
1800		1743
1801	return PerlIOBuf_flush (aTHX_ f);	1744	return PerlIOBuf_flush (aTHX_ f);
1802	}	1745	}
…		…
1833	PerlIOBuf_set_ptrcnt,	1776	PerlIOBuf_set_ptrcnt,
1834	};	1777	};
1835		1778
1836	/*****************************************************************************/	1779	/*****************************************************************************/
1837		1780
1838	static const CV *ssl_cv; /* for quick consistency check */
1839
1840	static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */	1781	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1782	static const CV *slf_cv;
1841	static SV *ssl_arg0;	1783	static SV **slf_argv;
1842	static SV *ssl_arg1;	1784	static int slf_argc, slf_arga; /* count, allocated */
		1785	static I32 slf_ax; /* top of stack, for restore */
1843		1786
1844	/* this restores the stack in the case we patched the entersub, to */	1787	/* this restores the stack in the case we patched the entersub, to */
1845	/* recreate the stack frame as perl will on following calls */	1788	/* recreate the stack frame as perl will on following calls */
1846	/* since entersub cleared the stack */	1789	/* since entersub cleared the stack */
1847	static OP *	1790	static OP *
1848	pp_restore (pTHX)	1791	pp_restore (pTHX)
1849	{	1792	{
1850	dSP;	1793	int i;
		1794	SV **SP = PL_stack_base + slf_ax;
1851		1795
1852	PUSHMARK (SP);	1796	PUSHMARK (SP);
1853		1797
1854	EXTEND (SP, 3);	1798	EXTEND (SP, slf_argc + 1);
1855	if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;	1799
1856	if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;	1800	for (i = 0; i < slf_argc; ++i)
		1801	PUSHs (sv_2mortal (slf_argv [i]));
		1802
1857	PUSHs ((SV *)CvGV (ssl_cv));	1803	PUSHs ((SV *)CvGV (slf_cv));
1858		1804
1859	RETURNOP (ssl_restore.op_first);	1805	RETURNOP (slf_restore.op_first);
1860	}	1806	}
1861		1807
1862	#define OPpENTERSUB_SSL 15 /* the part of op_private entersub hopefully doesn't use */	1808	static void
		1809	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1810	{
		1811	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1812	}
1863		1813
1864	/* declare prototype */	1814	static void
1865	XS(XS_Coro__State__set_stacklevel);	1815	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1816	{
		1817	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1818
		1819	frame->prepare = slf_prepare_set_stacklevel;
		1820	frame->check = slf_check_nop;
		1821	frame->data = (void *)SvIV (arg [0]);
		1822	}
		1823
		1824	static void
		1825	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1826	{
		1827	SV **arg = (SV **)slf_frame.data;
		1828
		1829	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1830	}
		1831
		1832	static void
		1833	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1834	{
		1835	if (items != 2)
		1836	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1837
		1838	frame->prepare = slf_prepare_transfer;
		1839	frame->check = slf_check_nop;
		1840	frame->data = (void *)arg; /* let's hope it will stay valid */
		1841	}
		1842
		1843	static void
		1844	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1845	{
		1846	frame->prepare = prepare_schedule;
		1847	frame->check = slf_check_nop;
		1848	}
		1849
		1850	static void
		1851	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1852	{
		1853	frame->prepare = prepare_cede;
		1854	frame->check = slf_check_nop;
		1855	}
		1856
		1857	static void
		1858	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1859	{
		1860	frame->prepare = prepare_cede_notself;
		1861	frame->check = slf_check_nop;
		1862	}
		1863
		1864	/* we hijack an hopefully unused CV flag for our purposes */
		1865	#define CVf_SLF 0x4000
1866		1866
1867	/*	1867	/*
1868	* these not obviously related functions are all rolled into one	1868	* these not obviously related functions are all rolled into one
1869	* function to increase chances that they all will call transfer with the same	1869	* function to increase chances that they all will call transfer with the same
1870	* stack offset	1870	* stack offset
		1871	* SLF stands for "schedule-like-function".
1871	*/	1872	*/
1872	static OP *	1873	static OP *
1873	pp_set_stacklevel (pTHX)	1874	pp_slf (pTHX)
1874	{	1875	{
		1876	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1877
		1878	/* set up the slf frame, unless it has already been set-up */
		1879	/* the latter happens when a new coro has been started */
		1880	/* or when a new cctx was attached to an existing coroutine */
		1881	if (expect_true (!slf_frame.prepare))
		1882	{
		1883	/* first iteration */
1875	dSP;	1884	dSP;
1876	struct transfer_args ta;
1877	SV **arg = PL_stack_base + TOPMARK + 1;	1885	SV **arg = PL_stack_base + TOPMARK + 1;
1878	int items = SP - arg; /* args without function object */	1886	int items = SP - arg; /* args without function object */
		1887	SV *gv = *sp;
1879		1888
1880	/* do a quick consistency check on the "function" object, and if it isn't */	1889	/* do a quick consistency check on the "function" object, and if it isn't */
1881	/* for us, divert to the real entersub */	1890	/* for us, divert to the real entersub */
1882	if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)	1891	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1883	return PL_ppaddr[OP_ENTERSUB](aTHX);	1892	return PL_ppaddr[OP_ENTERSUB](aTHX);
1884		1893
1885	/* pop args */
1886	SP = PL_stack_base + POPMARK;
1887
1888	if (!(PL_op->op_flags & OPf_STACKED))	1894	if (!(PL_op->op_flags & OPf_STACKED))
1889	{	1895	{
1890	/* ampersand-form of call, use @_ instead of stack */	1896	/* ampersand-form of call, use @_ instead of stack */
1891	AV *av = GvAV (PL_defgv);	1897	AV *av = GvAV (PL_defgv);
1892	arg = AvARRAY (av);	1898	arg = AvARRAY (av);
1893	items = AvFILLp (av) + 1;	1899	items = AvFILLp (av) + 1;
		1900	}
		1901
		1902	/* now call the init function, which needs to set up slf_frame */
		1903	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1904	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1905
		1906	/* pop args */
		1907	SP = PL_stack_base + POPMARK;
		1908
		1909	PUTBACK;
		1910	}
		1911
		1912	/* now that we have a slf_frame, interpret it! */
		1913	/* we use a callback system not to make the code needlessly */
		1914	/* complicated, but so we can run multiple perl coros from one cctx */
		1915
		1916	do
		1917	{
		1918	struct coro_transfer_args ta;
		1919
		1920	slf_frame.prepare (aTHX_ &ta);
		1921	TRANSFER (ta, 0);
		1922
		1923	checkmark = PL_stack_sp - PL_stack_base;
		1924	}
		1925	while (slf_frame.check (aTHX_ &slf_frame));
		1926
		1927	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1928
		1929	/* return value handling - mostly like entersub */
		1930	{
		1931	dSP;
		1932	SV **bot = PL_stack_base + checkmark;
		1933	int gimme = GIMME_V;
		1934
		1935	/* make sure we put something on the stack in scalar context */
		1936	if (gimme == G_SCALAR)
		1937	{
		1938	if (sp == bot)
		1939	XPUSHs (&PL_sv_undef);
		1940
		1941	SP = bot + 1;
1894	}	1942	}
1895		1943
1896	PUTBACK;	1944	PUTBACK;
1897	switch (PL_op->op_private & OPpENTERSUB_SSL)	1945	}
1898	{
1899	case 0:
1900	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1901	break;
1902		1946
1903	case 1:	1947	/* exception handling */
1904	if (items != 2)	1948	if (expect_false (coro_throw))
1905	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1906
1907	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1908	break;
1909
1910	case 2:
1911	prepare_schedule (aTHX_ &ta);
1912	break;
1913
1914	case 3:
1915	prepare_cede (aTHX_ &ta);
1916	break;
1917
1918	case 4:
1919	prepare_cede_notself (aTHX_ &ta);
1920	break;
1921	}	1949	{
		1950	SV *exception = sv_2mortal (coro_throw);
1922		1951
1923	TRANSFER (ta, 0);	1952	coro_throw = 0;
1924	SPAGAIN;	1953	sv_setsv (ERRSV, exception);
		1954	croak (0);
		1955	}
1925		1956
1926	skip:	1957	return NORMAL;
1927	PUTBACK;
1928	SSL_TAIL;
1929	SPAGAIN;
1930	RETURN;
1931	}	1958	}
1932		1959
1933	static void	1960	static void
1934	coro_ssl_patch (pTHX_ CV *cv, int ix, SV **args, int items)	1961	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1935	{	1962	{
1936	assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));	1963	int i;
		1964	SV **arg = PL_stack_base + ax;
		1965	int items = PL_stack_sp - arg + 1;
1937		1966
1938	assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));	1967	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1968
		1969	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1970	&& PL_op->op_ppaddr != pp_slf)
		1971	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1972
		1973	CvFLAGS (cv) |= CVf_SLF;
		1974	CvXSUBANY (cv).any_ptr = (void *)init_cb;
1939	ssl_cv = cv;	1975	slf_cv = cv;
1940		1976
1941	/* we patch the op, and then re-run the whole call */	1977	/* we patch the op, and then re-run the whole call */
1942	/* we have to put some dummy argument on the stack for this to work */	1978	/* we have to put the same argument on the stack for this to work */
		1979	/* and this will be done by pp_restore */
1943	ssl_restore.op_next = (OP *)&ssl_restore;	1980	slf_restore.op_next = (OP *)&slf_restore;
1944	ssl_restore.op_type = OP_NULL;	1981	slf_restore.op_type = OP_CUSTOM;
1945	ssl_restore.op_ppaddr = pp_restore;	1982	slf_restore.op_ppaddr = pp_restore;
1946	ssl_restore.op_first = PL_op;	1983	slf_restore.op_first = PL_op;
1947		1984
1948	ssl_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;	1985	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1949	ssl_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1950		1986
		1987	if (items > slf_arga)
		1988	{
		1989	slf_arga = items;
		1990	free (slf_argv);
		1991	slf_argv = malloc (slf_arga * sizeof (SV *));
		1992	}
		1993
		1994	slf_argc = items;
		1995
		1996	for (i = 0; i < items; ++i)
		1997	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1998
1951	PL_op->op_ppaddr = pp_set_stacklevel;	1999	PL_op->op_ppaddr = pp_slf;
1952	PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */	2000	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1953		2001
1954	PL_op = (OP *)&ssl_restore;	2002	PL_op = (OP *)&slf_restore;
1955	}	2003	}
		2004
		2005	/*****************************************************************************/
		2006
		2007	static void
		2008	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2009	{
		2010	SV *count_sv = AvARRAY (av)[0];
		2011	IV count = SvIVX (count_sv);
		2012
		2013	count += adjust;
		2014	SvIVX (count_sv) = count;
		2015
		2016	/* now wake up as many waiters as are expected to lock */
		2017	while (count > 0 && AvFILLp (av) > 0)
		2018	{
		2019	SV *cb;
		2020
		2021	/* swap first two elements so we can shift a waiter */
		2022	AvARRAY (av)[0] = AvARRAY (av)[1];
		2023	AvARRAY (av)[1] = count_sv;
		2024	cb = av_shift (av);
		2025
		2026	if (SvOBJECT (cb))
		2027	api_ready (aTHX_ cb);
		2028	else
		2029	croak ("callbacks not yet supported");
		2030
		2031	SvREFCNT_dec (cb);
		2032
		2033	--count;
		2034	}
		2035	}
		2036
		2037	static void
		2038	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2039	{
		2040	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2041	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2042	}
		2043
		2044	static int
		2045	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2046	{
		2047	AV *av = (AV *)frame->data;
		2048	SV *count_sv = AvARRAY (av)[0];
		2049
		2050	if (SvIVX (count_sv) > 0)
		2051	{
		2052	SvSTATE_current->on_destroy = 0;
		2053	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2054	return 0;
		2055	}
		2056	else
		2057	{
		2058	int i;
		2059	/* if we were woken up but can't down, we look through the whole */
		2060	/* waiters list and only add us if we aren't in there already */
		2061	/* this avoids some degenerate memory usage cases */
		2062
		2063	for (i = 1; i <= AvFILLp (av); ++i)
		2064	if (AvARRAY (av)[i] == SvRV (coro_current))
		2065	return 1;
		2066
		2067	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2068	return 1;
		2069	}
		2070	}
		2071
		2072	static void
		2073	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2074	{
		2075	AV *av = (AV *)SvRV (arg [0]);
		2076
		2077	if (SvIVX (AvARRAY (av)[0]) > 0)
		2078	{
		2079	frame->data = (void *)av;
		2080	frame->prepare = prepare_nop;
		2081	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2082	}
		2083	else
		2084	{
		2085	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2086
		2087	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2088	frame->prepare = prepare_schedule;
		2089
		2090	/* to avoid race conditions when a woken-up coro gets terminated */
		2091	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2092	assert (!SvSTATE_current->on_destroy);//D
		2093	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2094	}
		2095
		2096	frame->check = slf_check_semaphore_down;
		2097
		2098	}
		2099
		2100	/*****************************************************************************/
		2101
		2102	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2103
		2104	/* create a closure from XS, returns a code reference */
		2105	/* the arg can be accessed via GENSUB_ARG from the callback */
		2106	/* the callback must use dXSARGS/XSRETURN */
		2107	static SV *
		2108	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2109	{
		2110	CV *cv = (CV *)NEWSV (0, 0);
		2111
		2112	sv_upgrade ((SV *)cv, SVt_PVCV);
		2113
		2114	CvANON_on (cv);
		2115	CvISXSUB_on (cv);
		2116	CvXSUB (cv) = xsub;
		2117	GENSUB_ARG = arg;
		2118
		2119	return newRV_noinc ((SV *)cv);
		2120	}
		2121
		2122	/*****************************************************************************/
1956		2123
1957	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2124	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1958		2125
1959	PROTOTYPES: DISABLE	2126	PROTOTYPES: DISABLE
1960		2127
1961	BOOT:	2128	BOOT:
1962	{	2129	{
1963	#ifdef USE_ITHREADS	2130	#ifdef USE_ITHREADS
1964	MUTEX_INIT (&coro_lock);
1965	# if CORO_PTHREAD	2131	# if CORO_PTHREAD
1966	coro_thx = PERL_GET_CONTEXT;	2132	coro_thx = PERL_GET_CONTEXT;
1967	# endif	2133	# endif
1968	#endif	2134	#endif
1969	BOOT_PAGESIZE;	2135	BOOT_PAGESIZE;
…		…
1990	main_top_env = PL_top_env;	2156	main_top_env = PL_top_env;
1991		2157
1992	while (main_top_env->je_prev)	2158	while (main_top_env->je_prev)
1993	main_top_env = main_top_env->je_prev;	2159	main_top_env = main_top_env->je_prev;
1994		2160
		2161	{
		2162	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2163
		2164	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2165	hv_store_ent (PL_custom_op_names, slf,
		2166	newSVpv ("coro_slf", 0), 0);
		2167
		2168	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2169	hv_store_ent (PL_custom_op_descs, slf,
		2170	newSVpv ("coro schedule like function", 0), 0);
		2171	}
		2172
1995	coroapi.ver = CORO_API_VERSION;	2173	coroapi.ver = CORO_API_VERSION;
1996	coroapi.rev = CORO_API_REVISION;	2174	coroapi.rev = CORO_API_REVISION;
		2175
1997	coroapi.transfer = api_transfer;	2176	coroapi.transfer = api_transfer;
		2177
		2178	coroapi.sv_state = SvSTATE_;
		2179	coroapi.execute_slf = api_execute_slf;
		2180	coroapi.prepare_nop = prepare_nop;
		2181	coroapi.prepare_schedule = prepare_schedule;
		2182	coroapi.prepare_cede = prepare_cede;
		2183	coroapi.prepare_cede_notself = prepare_cede_notself;
1998		2184
1999	{	2185	{
2000	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2186	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2001		2187
2002	if (!svp) croak ("Time::HiRes is required");	2188	if (!svp) croak ("Time::HiRes is required");
…		…
2037	OUTPUT:	2223	OUTPUT:
2038	RETVAL	2224	RETVAL
2039		2225
2040	void	2226	void
2041	_set_stacklevel (...)	2227	_set_stacklevel (...)
2042	ALIAS:	2228	CODE:
2043	Coro::State::transfer = 1	2229	CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
2044	Coro::schedule = 2	2230
2045	Coro::cede = 3	2231	void
2046	Coro::cede_notself = 4	2232	transfer (...)
2047	CODE:	2233	PROTOTYPE: $$
2048	coro_ssl_patch (aTHX_ cv, ix, &ST (0), items);	2234	CODE:
		2235	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2049		2236
2050	bool	2237	bool
2051	_destroy (SV *coro_sv)	2238	_destroy (SV *coro_sv)
2052	CODE:	2239	CODE:
2053	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2240	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2060	CODE:	2247	CODE:
2061	_exit (code);	2248	_exit (code);
2062		2249
2063	int	2250	int
2064	cctx_stacksize (int new_stacksize = 0)	2251	cctx_stacksize (int new_stacksize = 0)
		2252	PROTOTYPE: ;$
2065	CODE:	2253	CODE:
2066	RETVAL = cctx_stacksize;	2254	RETVAL = cctx_stacksize;
2067	if (new_stacksize)	2255	if (new_stacksize)
2068	{	2256	{
2069	cctx_stacksize = new_stacksize;	2257	cctx_stacksize = new_stacksize;
…		…
2072	OUTPUT:	2260	OUTPUT:
2073	RETVAL	2261	RETVAL
2074		2262
2075	int	2263	int
2076	cctx_max_idle (int max_idle = 0)	2264	cctx_max_idle (int max_idle = 0)
		2265	PROTOTYPE: ;$
2077	CODE:	2266	CODE:
2078	RETVAL = cctx_max_idle;	2267	RETVAL = cctx_max_idle;
2079	if (max_idle > 1)	2268	if (max_idle > 1)
2080	cctx_max_idle = max_idle;	2269	cctx_max_idle = max_idle;
2081	OUTPUT:	2270	OUTPUT:
2082	RETVAL	2271	RETVAL
2083		2272
2084	int	2273	int
2085	cctx_count ()	2274	cctx_count ()
		2275	PROTOTYPE:
2086	CODE:	2276	CODE:
2087	RETVAL = cctx_count;	2277	RETVAL = cctx_count;
2088	OUTPUT:	2278	OUTPUT:
2089	RETVAL	2279	RETVAL
2090		2280
2091	int	2281	int
2092	cctx_idle ()	2282	cctx_idle ()
		2283	PROTOTYPE:
2093	CODE:	2284	CODE:
2094	RETVAL = cctx_idle;	2285	RETVAL = cctx_idle;
2095	OUTPUT:	2286	OUTPUT:
2096	RETVAL	2287	RETVAL
2097		2288
2098	void	2289	void
2099	list ()	2290	list ()
		2291	PROTOTYPE:
2100	PPCODE:	2292	PPCODE:
2101	{	2293	{
2102	struct coro *coro;	2294	struct coro *coro;
2103	for (coro = coro_first; coro; coro = coro->next)	2295	for (coro = coro_first; coro; coro = coro->next)
2104	if (coro->hv)	2296	if (coro->hv)
…		…
2166		2358
2167	void	2359	void
2168	throw (Coro::State self, SV *throw = &PL_sv_undef)	2360	throw (Coro::State self, SV *throw = &PL_sv_undef)
2169	PROTOTYPE: $;$	2361	PROTOTYPE: $;$
2170	CODE:	2362	CODE:
		2363	{
		2364	struct coro *current = SvSTATE_current;
		2365	SV **throwp = self == current ? &coro_throw : &self->throw;
2171	SvREFCNT_dec (self->throw);	2366	SvREFCNT_dec (*throwp);
2172	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2367	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2368	}
2173		2369
2174	void	2370	void
2175	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2371	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2372	PROTOTYPE: $;$
		2373	C_ARGS: aTHX_ coro, flags
2176		2374
2177	SV *	2375	SV *
2178	has_cctx (Coro::State coro)	2376	has_cctx (Coro::State coro)
2179	PROTOTYPE: $	2377	PROTOTYPE: $
2180	CODE:	2378	CODE:
…		…
2204	OUTPUT:	2402	OUTPUT:
2205	RETVAL	2403	RETVAL
2206		2404
2207	void	2405	void
2208	force_cctx ()	2406	force_cctx ()
		2407	PROTOTYPE:
2209	CODE:	2408	CODE:
2210	struct coro *coro = SvSTATE (coro_current);
2211	coro->cctx->idle_sp = 0;	2409	SvSTATE_current->cctx->idle_sp = 0;
2212		2410
2213	void	2411	void
2214	swap_defsv (Coro::State self)	2412	swap_defsv (Coro::State self)
2215	PROTOTYPE: $	2413	PROTOTYPE: $
2216	ALIAS:	2414	ALIAS:
2217	swap_defav = 1	2415	swap_defav = 1
2218	CODE:	2416	CODE:
2219	if (!self->slot)	2417	if (!self->slot)
2220	croak ("cannot swap state with coroutine that has no saved state");	2418	croak ("cannot swap state with coroutine that has no saved state,");
2221	else	2419	else
2222	{	2420	{
2223	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2421	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2224	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2422	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2225		2423
…		…
2257	coroapi.schedule = api_schedule;	2455	coroapi.schedule = api_schedule;
2258	coroapi.cede = api_cede;	2456	coroapi.cede = api_cede;
2259	coroapi.cede_notself = api_cede_notself;	2457	coroapi.cede_notself = api_cede_notself;
2260	coroapi.ready = api_ready;	2458	coroapi.ready = api_ready;
2261	coroapi.is_ready = api_is_ready;	2459	coroapi.is_ready = api_is_ready;
2262	coroapi.nready = &coro_nready;	2460	coroapi.nready = coro_nready;
2263	coroapi.current = coro_current;	2461	coroapi.current = coro_current;
2264		2462
2265	GCoroAPI = &coroapi;	2463	GCoroAPI = &coroapi;
2266	sv_setiv (sv, (IV)&coroapi);	2464	sv_setiv (sv, (IV)&coroapi);
2267	SvREADONLY_on (sv);	2465	SvREADONLY_on (sv);
2268	}	2466	}
2269	}	2467	}
		2468
		2469	void
		2470	schedule (...)
		2471	CODE:
		2472	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2473
		2474	void
		2475	cede (...)
		2476	CODE:
		2477	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2478
		2479	void
		2480	cede_notself (...)
		2481	CODE:
		2482	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2270		2483
2271	void	2484	void
2272	_set_current (SV *current)	2485	_set_current (SV *current)
2273	PROTOTYPE: $	2486	PROTOTYPE: $
2274	CODE:	2487	CODE:
…		…
2277		2490
2278	void	2491	void
2279	_set_readyhook (SV *hook)	2492	_set_readyhook (SV *hook)
2280	PROTOTYPE: $	2493	PROTOTYPE: $
2281	CODE:	2494	CODE:
2282	LOCK;
2283	SvREFCNT_dec (coro_readyhook);	2495	SvREFCNT_dec (coro_readyhook);
2284	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2496	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2285	UNLOCK;
2286		2497
2287	int	2498	int
2288	prio (Coro::State coro, int newprio = 0)	2499	prio (Coro::State coro, int newprio = 0)
		2500	PROTOTYPE: $;$
2289	ALIAS:	2501	ALIAS:
2290	nice = 1	2502	nice = 1
2291	CODE:	2503	CODE:
2292	{	2504	{
2293	RETVAL = coro->prio;	2505	RETVAL = coro->prio;
…		…
2308		2520
2309	SV *	2521	SV *
2310	ready (SV *self)	2522	ready (SV *self)
2311	PROTOTYPE: $	2523	PROTOTYPE: $
2312	CODE:	2524	CODE:
2313	RETVAL = boolSV (api_ready (self));	2525	RETVAL = boolSV (api_ready (aTHX_ self));
2314	OUTPUT:	2526	OUTPUT:
2315	RETVAL	2527	RETVAL
2316		2528
2317	int	2529	int
2318	nready (...)	2530	nready (...)
…		…
2325	# for async_pool speedup	2537	# for async_pool speedup
2326	void	2538	void
2327	_pool_1 (SV *cb)	2539	_pool_1 (SV *cb)
2328	CODE:	2540	CODE:
2329	{	2541	{
2330	struct coro *coro = SvSTATE (coro_current);
2331	HV *hv = (HV *)SvRV (coro_current);	2542	HV *hv = (HV *)SvRV (coro_current);
		2543	struct coro *coro = SvSTATE_hv ((SV *)hv);
2332	AV *defav = GvAV (PL_defgv);	2544	AV *defav = GvAV (PL_defgv);
2333	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2545	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2334	AV *invoke_av;	2546	AV *invoke_av;
2335	int i, len;	2547	int i, len;
2336		2548
…		…
2357	{	2569	{
2358	av_fill (defav, len - 1);	2570	av_fill (defav, len - 1);
2359	for (i = 0; i < len; ++i)	2571	for (i = 0; i < len; ++i)
2360	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2572	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2361	}	2573	}
2362
2363	SvREFCNT_dec (invoke);
2364	}	2574	}
2365		2575
2366	void	2576	void
2367	_pool_2 (SV *cb)	2577	_pool_2 (SV *cb)
2368	CODE:	2578	CODE:
2369	{	2579	{
2370	struct coro *coro = SvSTATE (coro_current);	2580	HV *hv = (HV *)SvRV (coro_current);
		2581	struct coro *coro = SvSTATE_hv ((SV *)hv);
2371		2582
2372	sv_setsv (cb, &PL_sv_undef);	2583	sv_setsv (cb, &PL_sv_undef);
2373		2584
2374	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2585	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2375	coro->saved_deffh = 0;	2586	coro->saved_deffh = 0;
…		…
2382	SvREFCNT_dec (old);	2593	SvREFCNT_dec (old);
2383	croak ("\3async_pool terminate\2\n");	2594	croak ("\3async_pool terminate\2\n");
2384	}	2595	}
2385		2596
2386	av_clear (GvAV (PL_defgv));	2597	av_clear (GvAV (PL_defgv));
2387	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2598	hv_store (hv, "desc", sizeof ("desc") - 1,
2388	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2599	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2389		2600
2390	coro->prio = 0;	2601	coro->prio = 0;
2391		2602
2392	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2603	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2393	api_trace (coro_current, 0);	2604	api_trace (aTHX_ coro_current, 0);
2394		2605
2395	av_push (av_async_pool, newSVsv (coro_current));	2606	av_push (av_async_pool, newSVsv (coro_current));
2396	}	2607	}
2397
2398	#if 0
2399
2400	void
2401	_generator_call (...)
2402	PROTOTYPE: @
2403	PPCODE:
2404	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2405	xxxx
2406	abort ();
2407
2408	SV *
2409	gensub (SV *sub, ...)
2410	PROTOTYPE: &;@
2411	CODE:
2412	{
2413	struct coro *coro;
2414	MAGIC *mg;
2415	CV *xcv;
2416	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2417	int i;
2418
2419	CvGV (ncv) = CvGV (cv);
2420	CvFILE (ncv) = CvFILE (cv);
2421
2422	Newz (0, coro, 1, struct coro);
2423	coro->args = newAV ();
2424	coro->flags = CF_NEW;
2425
2426	av_extend (coro->args, items - 1);
2427	for (i = 1; i < items; i++)
2428	av_push (coro->args, newSVsv (ST (i)));
2429
2430	CvISXSUB_on (ncv);
2431	CvXSUBANY (ncv).any_ptr = (void *)coro;
2432
2433	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2434
2435	CvXSUB (ncv) = CvXSUB (xcv);
2436	CvANON_on (ncv);
2437
2438	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2439	RETVAL = newRV_noinc ((SV *)ncv);
2440	}
2441	OUTPUT:
2442	RETVAL
2443
2444	#endif
2445		2608
2446		2609
2447	MODULE = Coro::State PACKAGE = Coro::AIO	2610	MODULE = Coro::State PACKAGE = Coro::AIO
2448		2611
2449	void	2612	void
2450	_get_state (SV *self)	2613	_get_state (SV *self)
		2614	PROTOTYPE: $
2451	PPCODE:	2615	PPCODE:
2452	{	2616	{
2453	AV *defav = GvAV (PL_defgv);	2617	AV *defav = GvAV (PL_defgv);
2454	AV *av = newAV ();	2618	AV *av = newAV ();
2455	int i;	2619	int i;
…		…
2470		2634
2471	av_push (av, data_sv);	2635	av_push (av, data_sv);
2472		2636
2473	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2637	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2474		2638
2475	api_ready (self);	2639	api_ready (aTHX_ self);
2476	}	2640	}
2477		2641
2478	void	2642	void
2479	_set_state (SV *state)	2643	_set_state (SV *state)
2480	PROTOTYPE: $	2644	PROTOTYPE: $
…		…
2498	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2662	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2499		2663
2500	BOOT:	2664	BOOT:
2501	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2665	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2502		2666
2503	SV *	2667	void
2504	_schedule (...)	2668	_schedule (...)
2505	PROTOTYPE: @
2506	CODE:	2669	CODE:
2507	{	2670	{
2508	static int incede;	2671	static int incede;
2509		2672
2510	api_cede_notself ();	2673	api_cede_notself (aTHX);
2511		2674
2512	++incede;	2675	++incede;
2513	while (coro_nready >= incede && api_cede ())	2676	while (coro_nready >= incede && api_cede (aTHX))
2514	;	2677	;
2515		2678
2516	sv_setsv (sv_activity, &PL_sv_undef);	2679	sv_setsv (sv_activity, &PL_sv_undef);
2517	if (coro_nready >= incede)	2680	if (coro_nready >= incede)
2518	{	2681	{
…		…
2529	MODULE = Coro::State PACKAGE = PerlIO::cede	2692	MODULE = Coro::State PACKAGE = PerlIO::cede
2530		2693
2531	BOOT:	2694	BOOT:
2532	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2695	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2533		2696
		2697	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2698
		2699	SV *
		2700	new (SV *klass, SV *count_ = 0)
		2701	CODE:
		2702	{
		2703	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2704	AV *av = newAV ();
		2705	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2706	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2707	}
		2708	OUTPUT:
		2709	RETVAL
		2710
		2711	SV *
		2712	count (SV *self)
		2713	CODE:
		2714	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2715	OUTPUT:
		2716	RETVAL
		2717
		2718	void
		2719	up (SV *self, int adjust = 1)
		2720	ALIAS:
		2721	adjust = 1
		2722	CODE:
		2723	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
		2724
		2725	void
		2726	down (SV *self)
		2727	CODE:
		2728	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2729
		2730	void
		2731	try (SV *self)
		2732	PPCODE:
		2733	{
		2734	AV *av = (AV *)SvRV (self);
		2735	SV *count_sv = AvARRAY (av)[0];
		2736	IV count = SvIVX (count_sv);
		2737
		2738	if (count > 0)
		2739	{
		2740	--count;
		2741	SvIVX (count_sv) = count;
		2742	XSRETURN_YES;
		2743	}
		2744	else
		2745	XSRETURN_NO;
		2746	}
		2747
		2748	void
		2749	waiters (SV *self)
		2750	CODE:
		2751	{
		2752	AV *av = (AV *)SvRV (self);
		2753
		2754	if (GIMME_V == G_SCALAR)
		2755	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2756	else
		2757	{
		2758	int i;
		2759	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2760	for (i = 1; i <= AvFILLp (av); ++i)
		2761	PUSHs (newSVsv (AvARRAY (av)[i]));
		2762	}
		2763	}
		2764

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