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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.264 by root, Fri Nov 14 02:29:09 2008 UTC vs.
Revision 1.286 by root, Mon Nov 17 04:19:49 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
…		…
723	#ifndef MgPV_nolen_const	734	#ifndef MgPV_nolen_const
724	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \	735	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
725	SvPV_nolen((SV*)((mg)->mg_ptr)) : \	736	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
726	(const char*)(mg)->mg_ptr)	737	(const char*)(mg)->mg_ptr)
727	#endif	738	#endif
728
729	/* we sometimes need to create the effect of entersub calling us */
730	#define SSL_HEAD (void)0
731	/* we somtimes need to create the effect of leaving via entersub */
732	#define SSL_TAIL (void)0
733		739
734	/*	740	/*
735	* This overrides the default magic get method of %SIG elements.	741	* This overrides the default magic get method of %SIG elements.
736	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook	742	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737	* and instead of tryign to save and restore the hash elements, we just provide	743	* and instead of tryign to save and restore the hash elements, we just provide
…		…
809		815
810	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	816	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811	}	817	}
812		818
813	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 */
814	coro_setup (pTHX_ struct coro *coro)	833	coro_setup (pTHX_ struct coro *coro)
815	{	834	{
816	/*	835	/*
817	* emulate part of the perl startup here.	836	* emulate part of the perl startup here.
818	*/	837	*/
…		…
857	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	876	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
858	SPAGAIN;	877	SPAGAIN;
859	}	878	}
860		879
861	/* 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
862	* likely was suspended in set_stacklevel, called from entersub.	881	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
863	* set_stacklevel doesn't do anything on return, but entersub does LEAVE,
864	* so we ENTER here for symmetry.
865	*/	882	*/
866	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;
867	}	887	}
868		888
869	static void	889	static void
870	coro_destruct (pTHX_ struct coro *coro)	890	coro_destruct (pTHX_ struct coro *coro)
871	{	891	{
…		…
895		915
896	SvREFCNT_dec (PL_diehook);	916	SvREFCNT_dec (PL_diehook);
897	SvREFCNT_dec (PL_warnhook);	917	SvREFCNT_dec (PL_warnhook);
898		918
899	SvREFCNT_dec (coro->saved_deffh);	919	SvREFCNT_dec (coro->saved_deffh);
900	SvREFCNT_dec (coro->throw);	920	SvREFCNT_dec (coro_throw);
901		921
902	coro_destruct_stacks (aTHX);	922	coro_destruct_stacks (aTHX);
903	}	923	}
904		924
905	INLINE void	925	INLINE void
…		…
915	static int	935	static int
916	runops_trace (pTHX)	936	runops_trace (pTHX)
917	{	937	{
918	COP *oldcop = 0;	938	COP *oldcop = 0;
919	int oldcxix = -2;	939	int oldcxix = -2;
920	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 */
921	coro_cctx *cctx = coro->cctx;	941	coro_cctx *cctx = coro->cctx;
922		942
923	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	943	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
924	{	944	{
925	PERL_ASYNC_CHECK ();	945	PERL_ASYNC_CHECK ();
…		…
1035	TAINT_NOT;	1055	TAINT_NOT;
1036	return 0;	1056	return 0;
1037	}	1057	}
1038		1058
1039	static void	1059	static void
1040	prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)	1060	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1041	{	1061	{
1042	ta->prev = (struct coro *)cctx;	1062	ta->prev = (struct coro *)cctx;
1043	ta->next = 0;	1063	ta->next = 0;
1044	}	1064	}
1045		1065
…		…
1074		1094
1075	/* 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 */
1076	INLINE void	1096	INLINE void
1077	transfer_tail (pTHX)	1097	transfer_tail (pTHX)
1078	{	1098	{
1079	struct coro *next = (struct coro *)transfer_next;
1080	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1081	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1082
1083	free_coro_mortal (aTHX);	1099	free_coro_mortal (aTHX);
1084	UNLOCK;
1085
1086	if (expect_false (next->throw))
1087	{
1088	SV *exception = sv_2mortal (next->throw);
1089
1090	next->throw = 0;
1091	sv_setsv (ERRSV, exception);
1092	croak (0);
1093	}
1094	}	1100	}
1095		1101
1096	/*	1102	/*
1097	* this is a _very_ stripped down perl interpreter ;)	1103	* this is a _very_ stripped down perl interpreter ;)
1098	*/	1104	*/
…		…
1105	# endif	1111	# endif
1106	#endif	1112	#endif
1107	{	1113	{
1108	dTHX;	1114	dTHX;
1109		1115
1110	/* entersub called ENTER, but we never 'returned', undo that here */	1116	/* normally we would need to skip the entersub here */
1111	SSL_TAIL;	1117	/* not doing so will re-execute it, which is exactly what we want */
1112
1113	/* we now skip the op that did lead to transfer() */
1114	PL_op = PL_op->op_next;	1118	/* PL_nop = PL_nop->op_next */
1115		1119
1116	/* inject a fake subroutine call to cctx_init */	1120	/* inject a fake subroutine call to cctx_init */
1117	cctx_prepare (aTHX_ (coro_cctx *)arg);	1121	cctx_prepare (aTHX_ (coro_cctx *)arg);
1118		1122
1119	/* cctx_run is the alternative tail of transfer() */	1123	/* cctx_run is the alternative tail of transfer() */
…		…
1280	/** coroutine switching *****************************************************/	1284	/** coroutine switching *****************************************************/
1281		1285
1282	static void	1286	static void
1283	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1287	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1284	{	1288	{
		1289	/* TODO: throwing up here is considered harmful */
		1290
1285	if (expect_true (prev != next))	1291	if (expect_true (prev != next))
1286	{	1292	{
1287	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1293	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1288	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,");
1289		1295
1290	if (expect_false (next->flags & CF_RUNNING))	1296	if (expect_false (next->flags & CF_RUNNING))
1291	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,");
1292		1298
1293	if (expect_false (next->flags & CF_DESTROYED))	1299	if (expect_false (next->flags & CF_DESTROYED))
1294	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,");
1295		1301
1296	#if !PERL_VERSION_ATLEAST (5,10,0)	1302	#if !PERL_VERSION_ATLEAST (5,10,0)
1297	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1303	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1298	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,");
1299	#endif	1305	#endif
1300	}	1306	}
1301	}	1307	}
1302		1308
1303	/* always use the TRANSFER macro */	1309	/* always use the TRANSFER macro */
1304	static void NOINLINE	1310	static void NOINLINE /* noinline so we have a fixed stackframe */
1305	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1311	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1306	{	1312	{
1307	dSTACKLEVEL;	1313	dSTACKLEVEL;
1308		1314
1309	/* sometimes transfer is only called to set idle_sp */	1315	/* sometimes transfer is only called to set idle_sp */
1310	if (expect_false (!next))	1316	if (expect_false (!next))
1311	{	1317	{
1312	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1318	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1313	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 */
1314	}	1320	}
1315	else if (expect_true (prev != next))	1321	else if (expect_true (prev != next))
1316	{	1322	{
1317	coro_cctx *prev__cctx;	1323	coro_cctx *prev__cctx;
…		…
1324	prev->flags |= CF_RUNNING;	1330	prev->flags |= CF_RUNNING;
1325	}	1331	}
1326		1332
1327	prev->flags &= ~CF_RUNNING;	1333	prev->flags &= ~CF_RUNNING;
1328	next->flags |= CF_RUNNING;	1334	next->flags |= CF_RUNNING;
1329
1330	LOCK;
1331		1335
1332	/* first get rid of the old state */	1336	/* first get rid of the old state */
1333	save_perl (aTHX_ prev);	1337	save_perl (aTHX_ prev);
1334		1338
1335	if (expect_false (next->flags & CF_NEW))	1339	if (expect_false (next->flags & CF_NEW))
…		…
1344		1348
1345	prev__cctx = prev->cctx;	1349	prev__cctx = prev->cctx;
1346		1350
1347	/* possibly untie and reuse the cctx */	1351	/* possibly untie and reuse the cctx */
1348	if (expect_true (	1352	if (expect_true (
1349	prev__cctx->idle_sp == STACKLEVEL	1353	prev__cctx->idle_sp == (void *)stacklevel
1350	&& !(prev__cctx->flags & CC_TRACE)	1354	&& !(prev__cctx->flags & CC_TRACE)
1351	&& !force_cctx	1355	&& !force_cctx
1352	))	1356	))
1353	{	1357	{
1354	/* 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 */
1355	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));
1356		1360
1357	prev->cctx = 0;	1361	prev->cctx = 0;
1358		1362
1359	/* 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 */
…		…
1367		1371
1368	++next->usecount;	1372	++next->usecount;
1369		1373
1370	if (expect_true (!next->cctx))	1374	if (expect_true (!next->cctx))
1371	next->cctx = cctx_get (aTHX);	1375	next->cctx = cctx_get (aTHX);
1372
1373	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1374	transfer_next = next;
1375		1376
1376	if (expect_false (prev__cctx != next->cctx))	1377	if (expect_false (prev__cctx != next->cctx))
1377	{	1378	{
1378	prev__cctx->top_env = PL_top_env;	1379	prev__cctx->top_env = PL_top_env;
1379	PL_top_env = next->cctx->top_env;	1380	PL_top_env = next->cctx->top_env;
…		…
1393	coro_state_destroy (pTHX_ struct coro *coro)	1394	coro_state_destroy (pTHX_ struct coro *coro)
1394	{	1395	{
1395	if (coro->flags & CF_DESTROYED)	1396	if (coro->flags & CF_DESTROYED)
1396	return 0;	1397	return 0;
1397		1398
		1399	if (coro->on_destroy)
		1400	coro->on_destroy (aTHX_ coro);
		1401
1398	coro->flags |= CF_DESTROYED;	1402	coro->flags |= CF_DESTROYED;
1399		1403
1400	if (coro->flags & CF_READY)	1404	if (coro->flags & CF_READY)
1401	{	1405	{
1402	/* reduce nready, as destroying a ready coro effectively unreadies it */	1406	/* reduce nready, as destroying a ready coro effectively unreadies it */
1403	/* alternative: look through all ready queues and remove the coro */	1407	/* alternative: look through all ready queues and remove the coro */
1404	LOCK;
1405	--coro_nready;	1408	--coro_nready;
1406	UNLOCK;
1407	}	1409	}
1408	else	1410	else
1409	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 */
1410		1412
1411	if (coro->mainstack && coro->mainstack != main_mainstack)	1413	if (coro->mainstack && coro->mainstack != main_mainstack)
1412	{	1414	{
1413	struct coro temp;	1415	struct coro temp;
1414		1416
1415	if (coro->flags & CF_RUNNING)	1417	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1416	croak ("FATAL: tried to destroy currently running coroutine");
1417		1418
1418	save_perl (aTHX_ &temp);	1419	save_perl (aTHX_ &temp);
1419	load_perl (aTHX_ coro);	1420	load_perl (aTHX_ coro);
1420		1421
1421	coro_destruct (aTHX_ coro);	1422	coro_destruct (aTHX_ coro);
…		…
1472	# define MGf_DUP 0	1473	# define MGf_DUP 0
1473	#endif	1474	#endif
1474	};	1475	};
1475		1476
1476	static void	1477	static void
1477	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)
1478	{	1479	{
1479	ta->prev = SvSTATE (prev_sv);	1480	ta->prev = SvSTATE (prev_sv);
1480	ta->next = SvSTATE (next_sv);	1481	ta->next = SvSTATE (next_sv);
1481	TRANSFER_CHECK (*ta);	1482	TRANSFER_CHECK (*ta);
1482	}	1483	}
1483		1484
1484	static void	1485	static void
1485	api_transfer (SV *prev_sv, SV *next_sv)	1486	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1486	{	1487	{
1487	dTHX;
1488	struct transfer_args ta;	1488	struct coro_transfer_args ta;
1489		1489
1490	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1490	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1491	TRANSFER (ta, 1);	1491	TRANSFER (ta, 1);
1492	}	1492	}
1493		1493
1494	/** Coro ********************************************************************/	1494	/** Coro ********************************************************************/
1495		1495
1496	static void	1496	INLINE void
1497	coro_enq (pTHX_ SV *coro_sv)	1497	coro_enq (pTHX_ struct coro *coro)
1498	{	1498	{
1499	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));
1500	}	1500	}
1501		1501
1502	static SV *	1502	INLINE SV *
1503	coro_deq (pTHX)	1503	coro_deq (pTHX)
1504	{	1504	{
1505	int prio;	1505	int prio;
1506		1506
1507	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1507	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1510		1510
1511	return 0;	1511	return 0;
1512	}	1512	}
1513		1513
1514	static int	1514	static int
1515	api_ready (SV *coro_sv)	1515	api_ready (pTHX_ SV *coro_sv)
1516	{	1516	{
1517	dTHX;
1518	struct coro *coro;	1517	struct coro *coro;
1519	SV *sv_hook;	1518	SV *sv_hook;
1520	void (*xs_hook)(void);	1519	void (*xs_hook)(void);
1521		1520
1522	if (SvROK (coro_sv))	1521	if (SvROK (coro_sv))
…		…
1527	if (coro->flags & CF_READY)	1526	if (coro->flags & CF_READY)
1528	return 0;	1527	return 0;
1529		1528
1530	coro->flags |= CF_READY;	1529	coro->flags |= CF_READY;
1531		1530
1532	LOCK;
1533
1534	sv_hook = coro_nready ? 0 : coro_readyhook;	1531	sv_hook = coro_nready ? 0 : coro_readyhook;
1535	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1532	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1536		1533
1537	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1534	coro_enq (aTHX_ coro);
1538	++coro_nready;	1535	++coro_nready;
1539		1536
1540	UNLOCK;
1541
1542	if (sv_hook)	1537	if (sv_hook)
1543	{	1538	{
1544	dSP;	1539	dSP;
1545		1540
1546	ENTER;	1541	ENTER;
…		…
1560		1555
1561	return 1;	1556	return 1;
1562	}	1557	}
1563		1558
1564	static int	1559	static int
1565	api_is_ready (SV *coro_sv)	1560	api_is_ready (pTHX_ SV *coro_sv)
1566	{	1561	{
1567	dTHX;
1568
1569	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1562	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1570	}	1563	}
1571		1564
1572	INLINE void	1565	INLINE void
1573	prepare_schedule (pTHX_ struct transfer_args *ta)	1566	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1574	{	1567	{
1575	SV *prev_sv, *next_sv;	1568	SV *prev_sv, *next_sv;
1576		1569
1577	for (;;)	1570	for (;;)
1578	{	1571	{
1579	LOCK;
1580	next_sv = coro_deq (aTHX);	1572	next_sv = coro_deq (aTHX);
1581		1573
1582	/* nothing to schedule: call the idle handler */	1574	/* nothing to schedule: call the idle handler */
1583	if (expect_false (!next_sv))	1575	if (expect_false (!next_sv))
1584	{	1576	{
1585	dSP;	1577	dSP;
1586	UNLOCK;
1587		1578
1588	ENTER;	1579	ENTER;
1589	SAVETMPS;	1580	SAVETMPS;
1590		1581
1591	PUSHMARK (SP);	1582	PUSHMARK (SP);
…		…
1596	FREETMPS;	1587	FREETMPS;
1597	LEAVE;	1588	LEAVE;
1598	continue;	1589	continue;
1599	}	1590	}
1600		1591
1601	ta->next = SvSTATE (next_sv);	1592	ta->next = SvSTATE_hv (next_sv);
1602		1593
1603	/* cannot transfer to destroyed coros, skip and look for next */	1594	/* cannot transfer to destroyed coros, skip and look for next */
1604	if (expect_false (ta->next->flags & CF_DESTROYED))	1595	if (expect_false (ta->next->flags & CF_DESTROYED))
1605	{	1596	{
1606	UNLOCK;
1607	SvREFCNT_dec (next_sv);	1597	SvREFCNT_dec (next_sv);
1608	/* coro_nready has already been taken care of by destroy */	1598	/* coro_nready has already been taken care of by destroy */
1609	continue;	1599	continue;
1610	}	1600	}
1611		1601
1612	--coro_nready;	1602	--coro_nready;
1613	UNLOCK;
1614	break;	1603	break;
1615	}	1604	}
1616		1605
1617	/* free this only after the transfer */	1606	/* free this only after the transfer */
1618	prev_sv = SvRV (coro_current);	1607	prev_sv = SvRV (coro_current);
1619	ta->prev = SvSTATE (prev_sv);	1608	ta->prev = SvSTATE_hv (prev_sv);
1620	TRANSFER_CHECK (*ta);	1609	TRANSFER_CHECK (*ta);
1621	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));
1622	ta->next->flags &= ~CF_READY;	1611	ta->next->flags &= ~CF_READY;
1623	SvRV_set (coro_current, next_sv);	1612	SvRV_set (coro_current, next_sv);
1624		1613
1625	LOCK;
1626	free_coro_mortal (aTHX);	1614	free_coro_mortal (aTHX);
1627	coro_mortal = prev_sv;	1615	coro_mortal = prev_sv;
1628	UNLOCK;
1629	}	1616	}
1630		1617
1631	INLINE void	1618	INLINE void
1632	prepare_cede (pTHX_ struct transfer_args *ta)	1619	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1633	{	1620	{
1634	api_ready (coro_current);	1621	api_ready (aTHX_ coro_current);
1635	prepare_schedule (aTHX_ ta);	1622	prepare_schedule (aTHX_ ta);
1636	}	1623	}
1637		1624
		1625	INLINE void
		1626	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1627	{
		1628	SV *prev = SvRV (coro_current);
		1629
		1630	if (coro_nready)
		1631	{
		1632	prepare_schedule (aTHX_ ta);
		1633	api_ready (aTHX_ prev);
		1634	}
		1635	else
		1636	prepare_nop (aTHX_ ta);
		1637	}
		1638
		1639	static void
		1640	api_schedule (pTHX)
		1641	{
		1642	struct coro_transfer_args ta;
		1643
		1644	prepare_schedule (aTHX_ &ta);
		1645	TRANSFER (ta, 1);
		1646	}
		1647
1638	static int	1648	static int
1639	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1649	api_cede (pTHX)
1640	{	1650	{
1641	if (coro_nready)	1651	struct coro_transfer_args ta;
1642	{	1652
1643	SV *prev = SvRV (coro_current);
1644	prepare_schedule (aTHX_ ta);	1653	prepare_cede (aTHX_ &ta);
1645	api_ready (prev);	1654
		1655	if (expect_true (ta.prev != ta.next))
		1656	{
		1657	TRANSFER (ta, 1);
1646	return 1;	1658	return 1;
1647	}	1659	}
1648	else	1660	else
1649	return 0;	1661	return 0;
1650	}	1662	}
1651		1663
1652	static void
1653	api_schedule (void)
1654	{
1655	dTHX;
1656	struct transfer_args ta;
1657
1658	prepare_schedule (aTHX_ &ta);
1659	TRANSFER (ta, 1);
1660	}
1661
1662	static int	1664	static int
1663	api_cede (void)	1665	api_cede_notself (pTHX)
1664	{	1666	{
1665	dTHX;	1667	if (coro_nready)
		1668	{
1666	struct transfer_args ta;	1669	struct coro_transfer_args ta;
1667		1670
1668	prepare_cede (aTHX_ &ta);	1671	prepare_cede_notself (aTHX_ &ta);
1669
1670	if (expect_true (ta.prev != ta.next))
1671	{
1672	TRANSFER (ta, 1);	1672	TRANSFER (ta, 1);
1673	return 1;	1673	return 1;
1674	}	1674	}
1675	else	1675	else
1676	return 0;	1676	return 0;
1677	}	1677	}
1678		1678
1679	static int	1679	static void
1680	api_cede_notself (void)
1681	{
1682	dTHX;
1683	struct transfer_args ta;
1684
1685	if (prepare_cede_notself (aTHX_ &ta))
1686	{
1687	TRANSFER (ta, 1);
1688	return 1;
1689	}
1690	else
1691	return 0;
1692	}
1693
1694	static void
1695	api_trace (SV *coro_sv, int flags)	1680	api_trace (pTHX_ SV *coro_sv, int flags)
1696	{	1681	{
1697	dTHX;
1698	struct coro *coro = SvSTATE (coro_sv);	1682	struct coro *coro = SvSTATE (coro_sv);
1699		1683
1700	if (flags & CC_TRACE)	1684	if (flags & CC_TRACE)
1701	{	1685	{
1702	if (!coro->cctx)	1686	if (!coro->cctx)
1703	coro->cctx = cctx_new_run ();	1687	coro->cctx = cctx_new_run ();
1704	else if (!(coro->cctx->flags & CC_TRACE))	1688	else if (!(coro->cctx->flags & CC_TRACE))
1705	croak ("cannot enable tracing on coroutine with custom stack");	1689	croak ("cannot enable tracing on coroutine with custom stack,");
1706		1690
1707	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1691	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1708	}	1692	}
1709	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1693	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1710	{	1694	{
…		…
1715	else	1699	else
1716	coro->slot->runops = RUNOPS_DEFAULT;	1700	coro->slot->runops = RUNOPS_DEFAULT;
1717	}	1701	}
1718	}	1702	}
1719		1703
1720	#if 0
1721	static int
1722	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1723	{
1724	AV *padlist;
1725	AV *av = (AV *)mg->mg_obj;
1726
1727	abort ();
1728
1729	return 0;
1730	}
1731
1732	static MGVTBL coro_gensub_vtbl = {
1733	0, 0, 0, 0,
1734	coro_gensub_free
1735	};
1736	#endif
1737
1738	/*****************************************************************************/	1704	/*****************************************************************************/
1739	/* PerlIO::cede */	1705	/* PerlIO::cede */
1740		1706
1741	typedef struct	1707	typedef struct
1742	{	1708	{
…		…
1769	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1735	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1770	double now = nvtime ();	1736	double now = nvtime ();
1771		1737
1772	if (now >= self->next)	1738	if (now >= self->next)
1773	{	1739	{
1774	api_cede ();	1740	api_cede (aTHX);
1775	self->next = now + self->every;	1741	self->next = now + self->every;
1776	}	1742	}
1777		1743
1778	return PerlIOBuf_flush (aTHX_ f);	1744	return PerlIOBuf_flush (aTHX_ f);
1779	}	1745	}
…		…
1810	PerlIOBuf_set_ptrcnt,	1776	PerlIOBuf_set_ptrcnt,
1811	};	1777	};
1812		1778
1813	/*****************************************************************************/	1779	/*****************************************************************************/
1814		1780
1815	static const CV *ssl_cv; /* for quick consistency check */
1816
1817	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;
1818	static SV *ssl_arg0;	1783	static SV **slf_argv;
1819	static SV *ssl_arg1;	1784	static int slf_argc, slf_arga; /* count, allocated */
		1785	static I32 slf_ax; /* top of stack, for restore */
1820		1786
1821	/* 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 */
1822	/* recreate the stack frame as perl will on following calls */	1788	/* recreate the stack frame as perl will on following calls */
1823	/* since entersub cleared the stack */	1789	/* since entersub cleared the stack */
1824	static OP *	1790	static OP *
1825	pp_restore (pTHX)	1791	pp_restore (pTHX)
1826	{	1792	{
1827	dSP;	1793	int i;
		1794	SV **SP = PL_stack_base + slf_ax;
1828		1795
1829	PUSHMARK (SP);	1796	PUSHMARK (SP);
1830		1797
1831	EXTEND (SP, 3);	1798	EXTEND (SP, slf_argc + 1);
1832	if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;	1799
1833	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
1834	PUSHs ((SV *)CvGV (ssl_cv));	1803	PUSHs ((SV *)CvGV (slf_cv));
1835		1804
1836	RETURNOP (ssl_restore.op_first);	1805	RETURNOP (slf_restore.op_first);
1837	}	1806	}
1838		1807
1839	/* declare prototype */	1808	static void
1840	XS(XS_Coro__State__set_stacklevel);	1809	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1810	{
		1811	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1812	}
1841		1813
		1814	static void
		1815	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1816	{
		1817	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1818
		1819	frame->prepare = slf_prepare_set_stacklevel;
		1820	frame->check = slf_check_nop;
		1821	frame->data = (void *)SvIV (arg [0]);
		1822	}
		1823
		1824	static void
		1825	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1826	{
		1827	SV **arg = (SV **)slf_frame.data;
		1828
		1829	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1830	}
		1831
		1832	static void
		1833	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1834	{
		1835	if (items != 2)
		1836	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1837
		1838	frame->prepare = slf_prepare_transfer;
		1839	frame->check = slf_check_nop;
		1840	frame->data = (void *)arg; /* let's hope it will stay valid */
		1841	}
		1842
		1843	static void
		1844	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1845	{
		1846	frame->prepare = prepare_schedule;
		1847	frame->check = slf_check_nop;
		1848	}
		1849
		1850	static void
		1851	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1852	{
		1853	frame->prepare = prepare_cede;
		1854	frame->check = slf_check_nop;
		1855	}
		1856
		1857	static void
		1858	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1859	{
		1860	frame->prepare = prepare_cede_notself;
		1861	frame->check = slf_check_nop;
		1862	}
		1863
		1864	/* we hijack an hopefully unused CV flag for our purposes */
		1865	#define CVf_SLF 0x4000
		1866
		1867	/*
		1868	* these not obviously related functions are all rolled into one
		1869	* function to increase chances that they all will call transfer with the same
		1870	* stack offset
		1871	* SLF stands for "schedule-like-function".
		1872	*/
1842	static OP *	1873	static OP *
1843	pp_set_stacklevel (pTHX)	1874	pp_slf (pTHX)
1844	{	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 */
1845	dSP;	1884	dSP;
1846	struct transfer_args ta;
1847	SV **arg = PL_stack_base + TOPMARK + 1;	1885	SV **arg = PL_stack_base + TOPMARK + 1;
1848	int items = SP - arg; /* args without function object */	1886	int items = SP - arg; /* args without function object */
		1887	SV *gv = *sp;
1849		1888
1850	/* 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 */
1851	/* for us, divert to the real entersub */	1890	/* for us, divert to the real entersub */
1852	if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)	1891	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1853	return PL_ppaddr[OP_ENTERSUB](aTHX);	1892	return PL_ppaddr[OP_ENTERSUB](aTHX);
1854		1893
1855	/* pop args */
1856	SP = PL_stack_base + POPMARK;
1857
1858	if (!(PL_op->op_flags & OPf_STACKED))	1894	if (!(PL_op->op_flags & OPf_STACKED))
1859	{	1895	{
1860	/* ampersand-form of call, use @_ instead of stack */	1896	/* ampersand-form of call, use @_ instead of stack */
1861	AV *av = GvAV (PL_defgv);	1897	AV *av = GvAV (PL_defgv);
1862	arg = AvARRAY (av);	1898	arg = AvARRAY (av);
1863	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;
1864	}	1942	}
1865		1943
1866	PUTBACK;	1944	PUTBACK;
1867	switch (PL_op->op_private & 7)	1945	}
1868	{
1869	case 0:
1870	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1871	break;
1872		1946
1873	case 1:	1947	/* exception handling */
1874	if (items != 2)	1948	if (expect_false (coro_throw))
1875	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1876
1877	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1878	break;
1879
1880	case 2:
1881	prepare_schedule (aTHX_ &ta);
1882	break;
1883
1884	case 3:
1885	prepare_cede (aTHX_ &ta);
1886	break;
1887
1888	case 4:
1889	if (!prepare_cede_notself (aTHX_ &ta))
1890	RETURN;
1891
1892	break;
1893	}	1949	{
		1950	SV *exception = sv_2mortal (coro_throw);
1894		1951
1895	TRANSFER (ta, 0);	1952	coro_throw = 0;
1896	SPAGAIN;	1953	sv_setsv (ERRSV, exception);
		1954	croak (0);
		1955	}
1897		1956
1898	skip:	1957	return NORMAL;
1899
1900	RETURN;
1901	}	1958	}
		1959
		1960	static void
		1961	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1962	{
		1963	int i;
		1964	SV **arg = PL_stack_base + ax;
		1965	int items = PL_stack_sp - arg + 1;
		1966
		1967	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1968
		1969	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1970	&& PL_op->op_ppaddr != pp_slf)
		1971	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1972
		1973	CvFLAGS (cv) |= CVf_SLF;
		1974	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1975	slf_cv = cv;
		1976
		1977	/* we patch the op, and then re-run the whole call */
		1978	/* we have to put the same argument on the stack for this to work */
		1979	/* and this will be done by pp_restore */
		1980	slf_restore.op_next = (OP *)&slf_restore;
		1981	slf_restore.op_type = OP_CUSTOM;
		1982	slf_restore.op_ppaddr = pp_restore;
		1983	slf_restore.op_first = PL_op;
		1984
		1985	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1986
		1987	if (PL_op->op_flags & OPf_STACKED)
		1988	{
		1989	if (items > slf_arga)
		1990	{
		1991	slf_arga = items;
		1992	free (slf_argv);
		1993	slf_argv = malloc (slf_arga * sizeof (SV *));
		1994	}
		1995
		1996	slf_argc = items;
		1997
		1998	for (i = 0; i < items; ++i)
		1999	slf_argv [i] = SvREFCNT_inc (arg [i]);
		2000	}
		2001	else
		2002	slf_argc = 0;
		2003
		2004	PL_op->op_ppaddr = pp_slf;
		2005	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		2006
		2007	PL_op = (OP *)&slf_restore;
		2008	}
		2009
		2010	/*****************************************************************************/
		2011
		2012	static void
		2013	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2014	{
		2015	SV *count_sv = AvARRAY (av)[0];
		2016	IV count = SvIVX (count_sv);
		2017
		2018	count += adjust;
		2019	SvIVX (count_sv) = count;
		2020
		2021	/* now wake up as many waiters as are expected to lock */
		2022	while (count > 0 && AvFILLp (av) > 0)
		2023	{
		2024	SV *cb;
		2025
		2026	/* swap first two elements so we can shift a waiter */
		2027	AvARRAY (av)[0] = AvARRAY (av)[1];
		2028	AvARRAY (av)[1] = count_sv;
		2029	cb = av_shift (av);
		2030
		2031	if (SvOBJECT (cb))
		2032	api_ready (aTHX_ cb);
		2033	else
		2034	croak ("callbacks not yet supported");
		2035
		2036	SvREFCNT_dec (cb);
		2037
		2038	--count;
		2039	}
		2040	}
		2041
		2042	static void
		2043	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2044	{
		2045	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2046	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2047	}
		2048
		2049	static int
		2050	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2051	{
		2052	AV *av = (AV *)frame->data;
		2053	SV *count_sv = AvARRAY (av)[0];
		2054
		2055	if (SvIVX (count_sv) > 0)
		2056	{
		2057	SvSTATE_current->on_destroy = 0;
		2058	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2059	return 0;
		2060	}
		2061	else
		2062	{
		2063	int i;
		2064	/* if we were woken up but can't down, we look through the whole */
		2065	/* waiters list and only add us if we aren't in there already */
		2066	/* this avoids some degenerate memory usage cases */
		2067
		2068	for (i = 1; i <= AvFILLp (av); ++i)
		2069	if (AvARRAY (av)[i] == SvRV (coro_current))
		2070	return 1;
		2071
		2072	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2073	return 1;
		2074	}
		2075	}
		2076
		2077	static void
		2078	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2079	{
		2080	AV *av = (AV *)SvRV (arg [0]);
		2081
		2082	if (SvIVX (AvARRAY (av)[0]) > 0)
		2083	{
		2084	frame->data = (void *)av;
		2085	frame->prepare = prepare_nop;
		2086	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2087	}
		2088	else
		2089	{
		2090	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2091
		2092	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2093	frame->prepare = prepare_schedule;
		2094
		2095	/* to avoid race conditions when a woken-up coro gets terminated */
		2096	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2097	assert (!SvSTATE_current->on_destroy);//D
		2098	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2099	}
		2100
		2101	frame->check = slf_check_semaphore_down;
		2102
		2103	}
		2104
		2105	/*****************************************************************************/
		2106
		2107	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2108
		2109	/* create a closure from XS, returns a code reference */
		2110	/* the arg can be accessed via GENSUB_ARG from the callback */
		2111	/* the callback must use dXSARGS/XSRETURN */
		2112	static SV *
		2113	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2114	{
		2115	CV *cv = (CV *)NEWSV (0, 0);
		2116
		2117	sv_upgrade ((SV *)cv, SVt_PVCV);
		2118
		2119	CvANON_on (cv);
		2120	CvISXSUB_on (cv);
		2121	CvXSUB (cv) = xsub;
		2122	GENSUB_ARG = arg;
		2123
		2124	return newRV_noinc ((SV *)cv);
		2125	}
		2126
		2127	/*****************************************************************************/
1902		2128
1903	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2129	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1904		2130
1905	PROTOTYPES: DISABLE	2131	PROTOTYPES: DISABLE
1906		2132
1907	# these not obviously related functions are all rolled into the same xs
1908	# function to increase chances that they all will call transfer with the same
1909	# stack offset
1910	void
1911	_set_stacklevel (...)
1912	ALIAS:
1913	Coro::State::transfer = 1
1914	Coro::schedule = 2
1915	Coro::cede = 3
1916	Coro::cede_notself = 4
1917	CODE:
1918	{
1919	assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1920
1921	/* we patch the op, and then re-run the whole call */
1922	/* we have to put some dummy argument on the stack for this to work */
1923	/* TODO: walk back the opcode chain (but how?), nuke the pp_gv etc. */
1924	ssl_restore.op_next = (OP *)&ssl_restore;
1925	ssl_restore.op_type = OP_NULL;
1926	ssl_restore.op_ppaddr = pp_restore;
1927	ssl_restore.op_first = PL_op;
1928
1929	ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1930	ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1931
1932	PL_op->op_ppaddr = pp_set_stacklevel;
1933	PL_op->op_private = PL_op->op_private & ~7 | ix; /* we potentially share our private flags with entersub */
1934
1935	PL_op = (OP *)&ssl_restore;
1936	}
1937
1938	BOOT:	2133	BOOT:
1939	{	2134	{
1940	#ifdef USE_ITHREADS	2135	#ifdef USE_ITHREADS
1941	MUTEX_INIT (&coro_lock);
1942	# if CORO_PTHREAD	2136	# if CORO_PTHREAD
1943	coro_thx = PERL_GET_CONTEXT;	2137	coro_thx = PERL_GET_CONTEXT;
1944	# endif	2138	# endif
1945	#endif	2139	#endif
1946	BOOT_PAGESIZE;	2140	BOOT_PAGESIZE;
1947
1948	ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0);
1949		2141
1950	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	2142	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1951	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	2143	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1952		2144
1953	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;	2145	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
…		…
1969	main_top_env = PL_top_env;	2161	main_top_env = PL_top_env;
1970		2162
1971	while (main_top_env->je_prev)	2163	while (main_top_env->je_prev)
1972	main_top_env = main_top_env->je_prev;	2164	main_top_env = main_top_env->je_prev;
1973		2165
		2166	{
		2167	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2168
		2169	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2170	hv_store_ent (PL_custom_op_names, slf,
		2171	newSVpv ("coro_slf", 0), 0);
		2172
		2173	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2174	hv_store_ent (PL_custom_op_descs, slf,
		2175	newSVpv ("coro schedule like function", 0), 0);
		2176	}
		2177
1974	coroapi.ver = CORO_API_VERSION;	2178	coroapi.ver = CORO_API_VERSION;
1975	coroapi.rev = CORO_API_REVISION;	2179	coroapi.rev = CORO_API_REVISION;
		2180
1976	coroapi.transfer = api_transfer;	2181	coroapi.transfer = api_transfer;
		2182
		2183	coroapi.sv_state = SvSTATE_;
		2184	coroapi.execute_slf = api_execute_slf;
		2185	coroapi.prepare_nop = prepare_nop;
		2186	coroapi.prepare_schedule = prepare_schedule;
		2187	coroapi.prepare_cede = prepare_cede;
		2188	coroapi.prepare_cede_notself = prepare_cede_notself;
1977		2189
1978	{	2190	{
1979	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2191	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1980		2192
1981	if (!svp) croak ("Time::HiRes is required");	2193	if (!svp) croak ("Time::HiRes is required");
…		…
2013	for (i = 1; i < items; i++)	2225	for (i = 1; i < items; i++)
2014	av_push (coro->args, newSVsv (ST (i)));	2226	av_push (coro->args, newSVsv (ST (i)));
2015	}	2227	}
2016	OUTPUT:	2228	OUTPUT:
2017	RETVAL	2229	RETVAL
		2230
		2231	void
		2232	_set_stacklevel (...)
		2233	CODE:
		2234	CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
		2235
		2236	void
		2237	transfer (...)
		2238	PROTOTYPE: $$
		2239	CODE:
		2240	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2018		2241
2019	bool	2242	bool
2020	_destroy (SV *coro_sv)	2243	_destroy (SV *coro_sv)
2021	CODE:	2244	CODE:
2022	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2245	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2029	CODE:	2252	CODE:
2030	_exit (code);	2253	_exit (code);
2031		2254
2032	int	2255	int
2033	cctx_stacksize (int new_stacksize = 0)	2256	cctx_stacksize (int new_stacksize = 0)
		2257	PROTOTYPE: ;$
2034	CODE:	2258	CODE:
2035	RETVAL = cctx_stacksize;	2259	RETVAL = cctx_stacksize;
2036	if (new_stacksize)	2260	if (new_stacksize)
2037	{	2261	{
2038	cctx_stacksize = new_stacksize;	2262	cctx_stacksize = new_stacksize;
…		…
2041	OUTPUT:	2265	OUTPUT:
2042	RETVAL	2266	RETVAL
2043		2267
2044	int	2268	int
2045	cctx_max_idle (int max_idle = 0)	2269	cctx_max_idle (int max_idle = 0)
		2270	PROTOTYPE: ;$
2046	CODE:	2271	CODE:
2047	RETVAL = cctx_max_idle;	2272	RETVAL = cctx_max_idle;
2048	if (max_idle > 1)	2273	if (max_idle > 1)
2049	cctx_max_idle = max_idle;	2274	cctx_max_idle = max_idle;
2050	OUTPUT:	2275	OUTPUT:
2051	RETVAL	2276	RETVAL
2052		2277
2053	int	2278	int
2054	cctx_count ()	2279	cctx_count ()
		2280	PROTOTYPE:
2055	CODE:	2281	CODE:
2056	RETVAL = cctx_count;	2282	RETVAL = cctx_count;
2057	OUTPUT:	2283	OUTPUT:
2058	RETVAL	2284	RETVAL
2059		2285
2060	int	2286	int
2061	cctx_idle ()	2287	cctx_idle ()
		2288	PROTOTYPE:
2062	CODE:	2289	CODE:
2063	RETVAL = cctx_idle;	2290	RETVAL = cctx_idle;
2064	OUTPUT:	2291	OUTPUT:
2065	RETVAL	2292	RETVAL
2066		2293
2067	void	2294	void
2068	list ()	2295	list ()
		2296	PROTOTYPE:
2069	PPCODE:	2297	PPCODE:
2070	{	2298	{
2071	struct coro *coro;	2299	struct coro *coro;
2072	for (coro = coro_first; coro; coro = coro->next)	2300	for (coro = coro_first; coro; coro = coro->next)
2073	if (coro->hv)	2301	if (coro->hv)
…		…
2135		2363
2136	void	2364	void
2137	throw (Coro::State self, SV *throw = &PL_sv_undef)	2365	throw (Coro::State self, SV *throw = &PL_sv_undef)
2138	PROTOTYPE: $;$	2366	PROTOTYPE: $;$
2139	CODE:	2367	CODE:
		2368	{
		2369	struct coro *current = SvSTATE_current;
		2370	SV **throwp = self == current ? &coro_throw : &self->throw;
2140	SvREFCNT_dec (self->throw);	2371	SvREFCNT_dec (*throwp);
2141	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2372	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2373	}
2142		2374
2143	void	2375	void
2144	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2376	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2377	PROTOTYPE: $;$
		2378	C_ARGS: aTHX_ coro, flags
2145		2379
2146	SV *	2380	SV *
2147	has_cctx (Coro::State coro)	2381	has_cctx (Coro::State coro)
2148	PROTOTYPE: $	2382	PROTOTYPE: $
2149	CODE:	2383	CODE:
…		…
2173	OUTPUT:	2407	OUTPUT:
2174	RETVAL	2408	RETVAL
2175		2409
2176	void	2410	void
2177	force_cctx ()	2411	force_cctx ()
		2412	PROTOTYPE:
2178	CODE:	2413	CODE:
2179	struct coro *coro = SvSTATE (coro_current);
2180	coro->cctx->idle_sp = 0;	2414	SvSTATE_current->cctx->idle_sp = 0;
2181		2415
2182	void	2416	void
2183	swap_defsv (Coro::State self)	2417	swap_defsv (Coro::State self)
2184	PROTOTYPE: $	2418	PROTOTYPE: $
2185	ALIAS:	2419	ALIAS:
2186	swap_defav = 1	2420	swap_defav = 1
2187	CODE:	2421	CODE:
2188	if (!self->slot)	2422	if (!self->slot)
2189	croak ("cannot swap state with coroutine that has no saved state");	2423	croak ("cannot swap state with coroutine that has no saved state,");
2190	else	2424	else
2191	{	2425	{
2192	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2426	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2193	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2427	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2194		2428
…		…
2226	coroapi.schedule = api_schedule;	2460	coroapi.schedule = api_schedule;
2227	coroapi.cede = api_cede;	2461	coroapi.cede = api_cede;
2228	coroapi.cede_notself = api_cede_notself;	2462	coroapi.cede_notself = api_cede_notself;
2229	coroapi.ready = api_ready;	2463	coroapi.ready = api_ready;
2230	coroapi.is_ready = api_is_ready;	2464	coroapi.is_ready = api_is_ready;
2231	coroapi.nready = &coro_nready;	2465	coroapi.nready = coro_nready;
2232	coroapi.current = coro_current;	2466	coroapi.current = coro_current;
2233		2467
2234	GCoroAPI = &coroapi;	2468	GCoroAPI = &coroapi;
2235	sv_setiv (sv, (IV)&coroapi);	2469	sv_setiv (sv, (IV)&coroapi);
2236	SvREADONLY_on (sv);	2470	SvREADONLY_on (sv);
2237	}	2471	}
2238	}	2472	}
		2473
		2474	void
		2475	schedule (...)
		2476	CODE:
		2477	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2478
		2479	void
		2480	cede (...)
		2481	CODE:
		2482	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2483
		2484	void
		2485	cede_notself (...)
		2486	CODE:
		2487	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2239		2488
2240	void	2489	void
2241	_set_current (SV *current)	2490	_set_current (SV *current)
2242	PROTOTYPE: $	2491	PROTOTYPE: $
2243	CODE:	2492	CODE:
…		…
2246		2495
2247	void	2496	void
2248	_set_readyhook (SV *hook)	2497	_set_readyhook (SV *hook)
2249	PROTOTYPE: $	2498	PROTOTYPE: $
2250	CODE:	2499	CODE:
2251	LOCK;
2252	SvREFCNT_dec (coro_readyhook);	2500	SvREFCNT_dec (coro_readyhook);
2253	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2501	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2254	UNLOCK;
2255		2502
2256	int	2503	int
2257	prio (Coro::State coro, int newprio = 0)	2504	prio (Coro::State coro, int newprio = 0)
		2505	PROTOTYPE: $;$
2258	ALIAS:	2506	ALIAS:
2259	nice = 1	2507	nice = 1
2260	CODE:	2508	CODE:
2261	{	2509	{
2262	RETVAL = coro->prio;	2510	RETVAL = coro->prio;
…		…
2277		2525
2278	SV *	2526	SV *
2279	ready (SV *self)	2527	ready (SV *self)
2280	PROTOTYPE: $	2528	PROTOTYPE: $
2281	CODE:	2529	CODE:
2282	RETVAL = boolSV (api_ready (self));	2530	RETVAL = boolSV (api_ready (aTHX_ self));
2283	OUTPUT:	2531	OUTPUT:
2284	RETVAL	2532	RETVAL
2285		2533
2286	int	2534	int
2287	nready (...)	2535	nready (...)
…		…
2294	# for async_pool speedup	2542	# for async_pool speedup
2295	void	2543	void
2296	_pool_1 (SV *cb)	2544	_pool_1 (SV *cb)
2297	CODE:	2545	CODE:
2298	{	2546	{
2299	struct coro *coro = SvSTATE (coro_current);
2300	HV *hv = (HV *)SvRV (coro_current);	2547	HV *hv = (HV *)SvRV (coro_current);
		2548	struct coro *coro = SvSTATE_hv ((SV *)hv);
2301	AV *defav = GvAV (PL_defgv);	2549	AV *defav = GvAV (PL_defgv);
2302	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2550	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2303	AV *invoke_av;	2551	AV *invoke_av;
2304	int i, len;	2552	int i, len;
2305		2553
…		…
2326	{	2574	{
2327	av_fill (defav, len - 1);	2575	av_fill (defav, len - 1);
2328	for (i = 0; i < len; ++i)	2576	for (i = 0; i < len; ++i)
2329	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2577	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2330	}	2578	}
2331
2332	SvREFCNT_dec (invoke);
2333	}	2579	}
2334		2580
2335	void	2581	void
2336	_pool_2 (SV *cb)	2582	_pool_2 (SV *cb)
2337	CODE:	2583	CODE:
2338	{	2584	{
2339	struct coro *coro = SvSTATE (coro_current);	2585	HV *hv = (HV *)SvRV (coro_current);
		2586	struct coro *coro = SvSTATE_hv ((SV *)hv);
2340		2587
2341	sv_setsv (cb, &PL_sv_undef);	2588	sv_setsv (cb, &PL_sv_undef);
2342		2589
2343	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2590	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2344	coro->saved_deffh = 0;	2591	coro->saved_deffh = 0;
…		…
2351	SvREFCNT_dec (old);	2598	SvREFCNT_dec (old);
2352	croak ("\3async_pool terminate\2\n");	2599	croak ("\3async_pool terminate\2\n");
2353	}	2600	}
2354		2601
2355	av_clear (GvAV (PL_defgv));	2602	av_clear (GvAV (PL_defgv));
2356	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2603	hv_store (hv, "desc", sizeof ("desc") - 1,
2357	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2604	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2358		2605
2359	coro->prio = 0;	2606	coro->prio = 0;
2360		2607
2361	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2608	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2362	api_trace (coro_current, 0);	2609	api_trace (aTHX_ coro_current, 0);
2363		2610
2364	av_push (av_async_pool, newSVsv (coro_current));	2611	av_push (av_async_pool, newSVsv (coro_current));
2365	}	2612	}
2366
2367	#if 0
2368
2369	void
2370	_generator_call (...)
2371	PROTOTYPE: @
2372	PPCODE:
2373	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2374	xxxx
2375	abort ();
2376
2377	SV *
2378	gensub (SV *sub, ...)
2379	PROTOTYPE: &;@
2380	CODE:
2381	{
2382	struct coro *coro;
2383	MAGIC *mg;
2384	CV *xcv;
2385	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2386	int i;
2387
2388	CvGV (ncv) = CvGV (cv);
2389	CvFILE (ncv) = CvFILE (cv);
2390
2391	Newz (0, coro, 1, struct coro);
2392	coro->args = newAV ();
2393	coro->flags = CF_NEW;
2394
2395	av_extend (coro->args, items - 1);
2396	for (i = 1; i < items; i++)
2397	av_push (coro->args, newSVsv (ST (i)));
2398
2399	CvISXSUB_on (ncv);
2400	CvXSUBANY (ncv).any_ptr = (void *)coro;
2401
2402	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2403
2404	CvXSUB (ncv) = CvXSUB (xcv);
2405	CvANON_on (ncv);
2406
2407	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2408	RETVAL = newRV_noinc ((SV *)ncv);
2409	}
2410	OUTPUT:
2411	RETVAL
2412
2413	#endif
2414		2613
2415		2614
2416	MODULE = Coro::State PACKAGE = Coro::AIO	2615	MODULE = Coro::State PACKAGE = Coro::AIO
2417		2616
2418	void	2617	void
2419	_get_state (SV *self)	2618	_get_state (SV *self)
		2619	PROTOTYPE: $
2420	PPCODE:	2620	PPCODE:
2421	{	2621	{
2422	AV *defav = GvAV (PL_defgv);	2622	AV *defav = GvAV (PL_defgv);
2423	AV *av = newAV ();	2623	AV *av = newAV ();
2424	int i;	2624	int i;
…		…
2439		2639
2440	av_push (av, data_sv);	2640	av_push (av, data_sv);
2441		2641
2442	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2642	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2443		2643
2444	api_ready (self);	2644	api_ready (aTHX_ self);
2445	}	2645	}
2446		2646
2447	void	2647	void
2448	_set_state (SV *state)	2648	_set_state (SV *state)
2449	PROTOTYPE: $	2649	PROTOTYPE: $
…		…
2467	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2667	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2468		2668
2469	BOOT:	2669	BOOT:
2470	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2670	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2471		2671
2472	SV *	2672	void
2473	_schedule (...)	2673	_schedule (...)
2474	PROTOTYPE: @
2475	CODE:	2674	CODE:
2476	{	2675	{
2477	static int incede;	2676	static int incede;
2478		2677
2479	api_cede_notself ();	2678	api_cede_notself (aTHX);
2480		2679
2481	++incede;	2680	++incede;
2482	while (coro_nready >= incede && api_cede ())	2681	while (coro_nready >= incede && api_cede (aTHX))
2483	;	2682	;
2484		2683
2485	sv_setsv (sv_activity, &PL_sv_undef);	2684	sv_setsv (sv_activity, &PL_sv_undef);
2486	if (coro_nready >= incede)	2685	if (coro_nready >= incede)
2487	{	2686	{
…		…
2498	MODULE = Coro::State PACKAGE = PerlIO::cede	2697	MODULE = Coro::State PACKAGE = PerlIO::cede
2499		2698
2500	BOOT:	2699	BOOT:
2501	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2700	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2502		2701
		2702	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2703
		2704	SV *
		2705	new (SV *klass, SV *count_ = 0)
		2706	CODE:
		2707	{
		2708	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2709	AV *av = newAV ();
		2710	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2711	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2712	}
		2713	OUTPUT:
		2714	RETVAL
		2715
		2716	SV *
		2717	count (SV *self)
		2718	CODE:
		2719	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2720	OUTPUT:
		2721	RETVAL
		2722
		2723	void
		2724	up (SV *self, int adjust = 1)
		2725	ALIAS:
		2726	adjust = 1
		2727	CODE:
		2728	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
		2729
		2730	void
		2731	down (SV *self)
		2732	CODE:
		2733	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2734
		2735	void
		2736	try (SV *self)
		2737	PPCODE:
		2738	{
		2739	AV *av = (AV *)SvRV (self);
		2740	SV *count_sv = AvARRAY (av)[0];
		2741	IV count = SvIVX (count_sv);
		2742
		2743	if (count > 0)
		2744	{
		2745	--count;
		2746	SvIVX (count_sv) = count;
		2747	XSRETURN_YES;
		2748	}
		2749	else
		2750	XSRETURN_NO;
		2751	}
		2752
		2753	void
		2754	waiters (SV *self)
		2755	CODE:
		2756	{
		2757	AV *av = (AV *)SvRV (self);
		2758
		2759	if (GIMME_V == G_SCALAR)
		2760	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2761	else
		2762	{
		2763	int i;
		2764	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2765	for (i = 1; i <= AvFILLp (av); ++i)
		2766	PUSHs (newSVsv (AvARRAY (av)[i]));
		2767	}
		2768	}
		2769

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