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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.263 by root, Wed Nov 12 04:49:06 2008 UTC vs.
Revision 1.283 by root, Sun Nov 16 11:12:57 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)
128	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
129	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
130	# define INLINE static inline	132	# define INLINE static inline
131	#else	133	#else
132	# define attribute(x)	134	# define attribute(x)
133	# define BARRIER
134	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
135	# define INLINE static	136	# define INLINE static
136	#endif	137	#endif
137		138
138	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
141	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
142		143
143	#include "CoroAPI.h"	144	#include "CoroAPI.h"
144		145
145	#ifdef USE_ITHREADS	146	#ifdef USE_ITHREADS
146
147	static perl_mutex coro_lock;
148	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
149	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
150	# if CORO_PTHREAD	147	# if CORO_PTHREAD
151	static void *coro_thx;	148	static void *coro_thx;
152	# endif	149	# endif
153
154	#else
155
156	# define LOCK (void)0
157	# define UNLOCK (void)0
158
159	#endif	150	#endif
160
161	# undef LOCK
162	# define LOCK (void)0
163	# undef UNLOCK
164	# define UNLOCK (void)0
165		151
166	/* helper storage struct for Coro::AIO */	152	/* helper storage struct for Coro::AIO */
167	struct io_state	153	struct io_state
168	{	154	{
169	AV *res;	155	AV *res;
…		…
180	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
181	static AV *main_mainstack; /* used to differentiate between $main and others */	167	static AV *main_mainstack; /* used to differentiate between $main and others */
182	static JMPENV *main_top_env;	168	static JMPENV *main_top_env;
183	static HV *coro_state_stash, *coro_stash;	169	static HV *coro_state_stash, *coro_stash;
184	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 */
185	static volatile struct coro *transfer_next;
186
187	struct transfer_args
188	{
189	struct coro *prev, *next;
190	};
191		171
192	static GV *irsgv; /* $/ */	172	static GV *irsgv; /* $/ */
193	static GV *stdoutgv; /* *STDOUT */	173	static GV *stdoutgv; /* *STDOUT */
194	static SV *rv_diehook;	174	static SV *rv_diehook;
195	static SV *rv_warnhook;	175	static SV *rv_warnhook;
…		…
214	CC_TRACE_LINE = 0x10, /* trace each statement */	194	CC_TRACE_LINE = 0x10, /* trace each statement */
215	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	195	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
216	};	196	};
217		197
218	/* this is a structure representing a c-level coroutine */	198	/* this is a structure representing a c-level coroutine */
219	typedef struct coro_cctx {	199	typedef struct coro_cctx
		200	{
220	struct coro_cctx *next;	201	struct coro_cctx *next;
221		202
222	/* the stack */	203	/* the stack */
223	void *sptr;	204	void *sptr;
224	size_t ssize;	205	size_t ssize;
…		…
242	CF_NEW = 0x0004, /* has never been switched to */	223	CF_NEW = 0x0004, /* has never been switched to */
243	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	224	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
244	};	225	};
245		226
246	/* 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 */
247	typedef struct {	228	typedef struct
		229	{
248	SV *defsv;	230	SV *defsv;
249	AV *defav;	231	AV *defav;
250	SV *errsv;	232	SV *errsv;
251	SV *irsgv;	233	SV *irsgv;
252	#define VAR(name,type) type name;	234	#define VAR(name,type) type name;
…		…
256		238
257	#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))
258		240
259	/* this is a structure representing a perl-level coroutine */	241	/* this is a structure representing a perl-level coroutine */
260	struct coro {	242	struct coro {
261	/* the c coroutine allocated to this perl coroutine, if any */	243	/* the C coroutine allocated to this perl coroutine, if any */
262	coro_cctx *cctx;	244	coro_cctx *cctx;
263		245
264	/* process data */	246	/* process data */
		247	struct CoroSLF slf_frame; /* saved slf frame */
265	AV *mainstack;	248	AV *mainstack;
266	perl_slots *slot; /* basically the saved sp */	249	perl_slots *slot; /* basically the saved sp */
267		250
268	AV *args; /* data associated with this coroutine (initial args) */	251	AV *args; /* data associated with this coroutine (initial args) */
269	int refcnt; /* coroutines are refcounted, yes */	252	int refcnt; /* coroutines are refcounted, yes */
270	int flags; /* CF_ flags */	253	int flags; /* CF_ flags */
271	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);
272		256
273	/* statistics */	257	/* statistics */
274	int usecount; /* number of transfers to this coro */	258	int usecount; /* number of transfers to this coro */
275		259
276	/* coro process data */	260	/* coro process data */
…		…
284	struct coro *next, *prev;	268	struct coro *next, *prev;
285	};	269	};
286		270
287	typedef struct coro *Coro__State;	271	typedef struct coro *Coro__State;
288	typedef struct coro *Coro__State_or_hashref;	272	typedef struct coro *Coro__State_or_hashref;
		273
		274	static struct CoroSLF slf_frame; /* the current slf frame */
289		275
290	/** Coro ********************************************************************/	276	/** Coro ********************************************************************/
291		277
292	#define PRIO_MAX 3	278	#define PRIO_MAX 3
293	#define PRIO_HIGH 1	279	#define PRIO_HIGH 1
…		…
298		284
299	/* for Coro.pm */	285	/* for Coro.pm */
300	static SV *coro_current;	286	static SV *coro_current;
301	static SV *coro_readyhook;	287	static SV *coro_readyhook;
302	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	288	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
303	static int coro_nready;
304	static struct coro *coro_first;	289	static struct coro *coro_first;
		290	#define coro_nready coroapi.nready
305		291
306	/** lowlevel stuff **********************************************************/	292	/** lowlevel stuff **********************************************************/
307		293
308	static SV *	294	static SV *
309	coro_get_sv (pTHX_ const char *name, int create)	295	coro_get_sv (pTHX_ const char *name, int create)
…		…
402	static MGVTBL coro_cv_vtbl = {	388	static MGVTBL coro_cv_vtbl = {
403	0, 0, 0, 0,	389	0, 0, 0, 0,
404	coro_cv_free	390	coro_cv_free
405	};	391	};
406		392
407	#define CORO_MAGIC(sv, type) \	393	#define CORO_MAGIC(sv, type) \
408	SvMAGIC (sv) \	394	expect_true (SvMAGIC (sv)) \
409	? SvMAGIC (sv)->mg_type == type \	395	? expect_true (SvMAGIC (sv)->mg_type == type) \
410	? SvMAGIC (sv) \	396	? SvMAGIC (sv) \
411	: mg_find (sv, type) \	397	: mg_find (sv, type) \
412	: 0	398	: 0
413		399
414	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	400	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
415	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	401	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
416		402
…		…
437	mg = CORO_MAGIC_state (coro);	423	mg = CORO_MAGIC_state (coro);
438	return (struct coro *)mg->mg_ptr;	424	return (struct coro *)mg->mg_ptr;
439	}	425	}
440		426
441	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	427	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		428
		429	/* fastert than SvSTATE, but expects a coroutine hv */
		430	INLINE struct coro *
		431	SvSTATE_hv (SV *sv)
		432	{
		433	MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
		434	? SvMAGIC (sv)
		435	: mg_find (sv, CORO_MAGIC_type_state);
		436
		437	return (struct coro *)mg->mg_ptr;
		438	}
		439
		440	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
442		441
443	/* the next two functions merely cache the padlists */	442	/* the next two functions merely cache the padlists */
444	static void	443	static void
445	get_padlist (pTHX_ CV *cv)	444	get_padlist (pTHX_ CV *cv)
446	{	445	{
…		…
513	CvPADLIST (cv) = (AV *)POPs;	512	CvPADLIST (cv) = (AV *)POPs;
514	}	513	}
515		514
516	PUTBACK;	515	PUTBACK;
517	}	516	}
		517
		518	slf_frame = c->slf_frame;
518	}	519	}
519		520
520	static void	521	static void
521	save_perl (pTHX_ Coro__State c)	522	save_perl (pTHX_ Coro__State c)
522	{	523	{
		524	c->slf_frame = slf_frame;
		525
523	{	526	{
524	dSP;	527	dSP;
525	I32 cxix = cxstack_ix;	528	I32 cxix = cxstack_ix;
526	PERL_CONTEXT *ccstk = cxstack;	529	PERL_CONTEXT *ccstk = cxstack;
527	PERL_SI *top_si = PL_curstackinfo;	530	PERL_SI *top_si = PL_curstackinfo;
…		…
594	#undef VAR	597	#undef VAR
595	}	598	}
596	}	599	}
597		600
598	/*	601	/*
599	* allocate various perl stacks. This is an exact copy	602	* allocate various perl stacks. This is almost an exact copy
600	* of perl.c:init_stacks, except that it uses less memory	603	* of perl.c:init_stacks, except that it uses less memory
601	* on the (sometimes correct) assumption that coroutines do	604	* on the (sometimes correct) assumption that coroutines do
602	* not usually need a lot of stackspace.	605	* not usually need a lot of stackspace.
603	*/	606	*/
604	#if CORO_PREFER_PERL_FUNCTIONS	607	#if CORO_PREFER_PERL_FUNCTIONS
…		…
725	#ifndef MgPV_nolen_const	728	#ifndef MgPV_nolen_const
726	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \	729	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
727	SvPV_nolen((SV*)((mg)->mg_ptr)) : \	730	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
728	(const char*)(mg)->mg_ptr)	731	(const char*)(mg)->mg_ptr)
729	#endif	732	#endif
730
731	/* we sometimes need to create the effect of entersub calling us */
732	#define ENTERSUB_HEAD ENTER; SAVETMPS
733	/* we somtimes need to create the effect of leaving via entersub */
734	#define ENTERSUB_TAIL LEAVE
735		733
736	/*	734	/*
737	* This overrides the default magic get method of %SIG elements.	735	* This overrides the default magic get method of %SIG elements.
738	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook	736	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739	* and instead of tryign to save and restore the hash elements, we just provide	737	* and instead of tryign to save and restore the hash elements, we just provide
…		…
811		809
812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	810	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813	}	811	}
814		812
815	static void	813	static void
		814	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		815	{
		816	/* kind of mega-hacky, but works */
		817	ta->next = ta->prev = (struct coro *)ta;
		818	}
		819
		820	static int
		821	slf_check_nop (pTHX_ struct CoroSLF *frame)
		822	{
		823	return 0;
		824	}
		825
		826	static void
816	coro_setup (pTHX_ struct coro *coro)	827	coro_setup (pTHX_ struct coro *coro)
817	{	828	{
818	/*	829	/*
819	* emulate part of the perl startup here.	830	* emulate part of the perl startup here.
820	*/	831	*/
…		…
859	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	870	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
860	SPAGAIN;	871	SPAGAIN;
861	}	872	}
862		873
863	/* this newly created coroutine might be run on an existing cctx which most	874	/* this newly created coroutine might be run on an existing cctx which most
864	* likely was suspended in set_stacklevel, called from entersub.	875	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
865	* set_stacklevel doesn't do anything on return, but entersub does LEAVE,
866	* so we ENTER here for symmetry.
867	*/	876	*/
868	ENTERSUB_HEAD;	877	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		878	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
869	}	879	}
870		880
871	static void	881	static void
872	coro_destruct (pTHX_ struct coro *coro)	882	coro_destruct (pTHX_ struct coro *coro)
873	{	883	{
…		…
917	static int	927	static int
918	runops_trace (pTHX)	928	runops_trace (pTHX)
919	{	929	{
920	COP *oldcop = 0;	930	COP *oldcop = 0;
921	int oldcxix = -2;	931	int oldcxix = -2;
922	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	932	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
923	coro_cctx *cctx = coro->cctx;	933	coro_cctx *cctx = coro->cctx;
924		934
925	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	935	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
926	{	936	{
927	PERL_ASYNC_CHECK ();	937	PERL_ASYNC_CHECK ();
…		…
1037	TAINT_NOT;	1047	TAINT_NOT;
1038	return 0;	1048	return 0;
1039	}	1049	}
1040		1050
1041	static void	1051	static void
1042	prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)	1052	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1043	{	1053	{
1044	ta->prev = (struct coro *)cctx;	1054	ta->prev = (struct coro *)cctx;
1045	ta->next = 0;	1055	ta->next = 0;
1046	}	1056	}
1047		1057
…		…
1076		1086
1077	/* the tail of transfer: execute stuff we can only do after a transfer */	1087	/* the tail of transfer: execute stuff we can only do after a transfer */
1078	INLINE void	1088	INLINE void
1079	transfer_tail (pTHX)	1089	transfer_tail (pTHX)
1080	{	1090	{
1081	struct coro *next = (struct coro *)transfer_next;
1082	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1083	assert (("FATAL: transfer_next was zero in transfer_tail (please report)", next));
1084
1085	free_coro_mortal (aTHX);	1091	free_coro_mortal (aTHX);
1086	UNLOCK;
1087
1088	if (expect_false (next->throw))
1089	{
1090	SV *exception = sv_2mortal (next->throw);
1091
1092	next->throw = 0;
1093	sv_setsv (ERRSV, exception);
1094	croak (0);
1095	}
1096	}	1092	}
1097		1093
1098	/*	1094	/*
1099	* this is a _very_ stripped down perl interpreter ;)	1095	* this is a _very_ stripped down perl interpreter ;)
1100	*/	1096	*/
…		…
1107	# endif	1103	# endif
1108	#endif	1104	#endif
1109	{	1105	{
1110	dTHX;	1106	dTHX;
1111		1107
1112	/* entersub called ENTER, but we never 'returned', undo that here */	1108	/* normally we would need to skip the entersub here */
1113	ENTERSUB_TAIL;	1109	/* not doing so will re-execute it, which is exactly what we want */
1114
1115	/* we now skip the entersub that did lead to transfer() */
1116	PL_op = PL_op->op_next;	1110	/* PL_nop = PL_nop->op_next */
1117		1111
1118	/* inject a fake subroutine call to cctx_init */	1112	/* inject a fake subroutine call to cctx_init */
1119	cctx_prepare (aTHX_ (coro_cctx *)arg);	1113	cctx_prepare (aTHX_ (coro_cctx *)arg);
1120		1114
1121	/* cctx_run is the alternative tail of transfer() */	1115	/* cctx_run is the alternative tail of transfer() */
…		…
1192	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1186	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1193	New (0, cctx->sptr, cctx_stacksize, long);	1187	New (0, cctx->sptr, cctx_stacksize, long);
1194		1188
1195	if (!cctx->sptr)	1189	if (!cctx->sptr)
1196	{	1190	{
1197	perror ("FATAL: unable to allocate stack for coroutine");	1191	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1198	_exit (EXIT_FAILURE);	1192	_exit (EXIT_FAILURE);
1199	}	1193	}
1200		1194
1201	stack_start = cctx->sptr;	1195	stack_start = cctx->sptr;
1202	stack_size = cctx->ssize;	1196	stack_size = cctx->ssize;
…		…
1285	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1279	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1286	{	1280	{
1287	if (expect_true (prev != next))	1281	if (expect_true (prev != next))
1288	{	1282	{
1289	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1283	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1290	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1284	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1291		1285
1292	if (expect_false (next->flags & CF_RUNNING))	1286	if (expect_false (next->flags & CF_RUNNING))
1293	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1287	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1294		1288
1295	if (expect_false (next->flags & CF_DESTROYED))	1289	if (expect_false (next->flags & CF_DESTROYED))
1296	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1290	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1297		1291
1298	#if !PERL_VERSION_ATLEAST (5,10,0)	1292	#if !PERL_VERSION_ATLEAST (5,10,0)
1299	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1293	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1300	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1294	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1301	#endif	1295	#endif
1302	}	1296	}
1303	}	1297	}
1304		1298
1305	/* always use the TRANSFER macro */	1299	/* always use the TRANSFER macro */
…		…
1309	dSTACKLEVEL;	1303	dSTACKLEVEL;
1310		1304
1311	/* sometimes transfer is only called to set idle_sp */	1305	/* sometimes transfer is only called to set idle_sp */
1312	if (expect_false (!next))	1306	if (expect_false (!next))
1313	{	1307	{
1314	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1308	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1315	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1309	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1316	}	1310	}
1317	else if (expect_true (prev != next))	1311	else if (expect_true (prev != next))
1318	{	1312	{
1319	coro_cctx *prev__cctx;	1313	coro_cctx *prev__cctx;
…		…
1326	prev->flags |= CF_RUNNING;	1320	prev->flags |= CF_RUNNING;
1327	}	1321	}
1328		1322
1329	prev->flags &= ~CF_RUNNING;	1323	prev->flags &= ~CF_RUNNING;
1330	next->flags |= CF_RUNNING;	1324	next->flags |= CF_RUNNING;
1331
1332	LOCK;
1333		1325
1334	/* first get rid of the old state */	1326	/* first get rid of the old state */
1335	save_perl (aTHX_ prev);	1327	save_perl (aTHX_ prev);
1336		1328
1337	if (expect_false (next->flags & CF_NEW))	1329	if (expect_false (next->flags & CF_NEW))
…		…
1346		1338
1347	prev__cctx = prev->cctx;	1339	prev__cctx = prev->cctx;
1348		1340
1349	/* possibly untie and reuse the cctx */	1341	/* possibly untie and reuse the cctx */
1350	if (expect_true (	1342	if (expect_true (
1351	prev__cctx->idle_sp == STACKLEVEL	1343	prev__cctx->idle_sp == (void *)stacklevel
1352	&& !(prev__cctx->flags & CC_TRACE)	1344	&& !(prev__cctx->flags & CC_TRACE)
1353	&& !force_cctx	1345	&& !force_cctx
1354	))	1346	))
1355	{	1347	{
1356	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1348	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1357	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));	1349	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1358		1350
1359	prev->cctx = 0;	1351	prev->cctx = 0;
1360		1352
1361	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1353	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
…		…
1369		1361
1370	++next->usecount;	1362	++next->usecount;
1371		1363
1372	if (expect_true (!next->cctx))	1364	if (expect_true (!next->cctx))
1373	next->cctx = cctx_get (aTHX);	1365	next->cctx = cctx_get (aTHX);
1374
1375	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1376	transfer_next = next;
1377		1366
1378	if (expect_false (prev__cctx != next->cctx))	1367	if (expect_false (prev__cctx != next->cctx))
1379	{	1368	{
1380	prev__cctx->top_env = PL_top_env;	1369	prev__cctx->top_env = PL_top_env;
1381	PL_top_env = next->cctx->top_env;	1370	PL_top_env = next->cctx->top_env;
…		…
1395	coro_state_destroy (pTHX_ struct coro *coro)	1384	coro_state_destroy (pTHX_ struct coro *coro)
1396	{	1385	{
1397	if (coro->flags & CF_DESTROYED)	1386	if (coro->flags & CF_DESTROYED)
1398	return 0;	1387	return 0;
1399		1388
		1389	if (coro->on_destroy)
		1390	coro->on_destroy (aTHX_ coro);
		1391
1400	coro->flags |= CF_DESTROYED;	1392	coro->flags |= CF_DESTROYED;
1401		1393
1402	if (coro->flags & CF_READY)	1394	if (coro->flags & CF_READY)
1403	{	1395	{
1404	/* reduce nready, as destroying a ready coro effectively unreadies it */	1396	/* reduce nready, as destroying a ready coro effectively unreadies it */
1405	/* alternative: look through all ready queues and remove the coro */	1397	/* alternative: look through all ready queues and remove the coro */
1406	LOCK;
1407	--coro_nready;	1398	--coro_nready;
1408	UNLOCK;
1409	}	1399	}
1410	else	1400	else
1411	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1401	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1412		1402
1413	if (coro->mainstack && coro->mainstack != main_mainstack)	1403	if (coro->mainstack && coro->mainstack != main_mainstack)
1414	{	1404	{
1415	struct coro temp;	1405	struct coro temp;
1416		1406
1417	if (coro->flags & CF_RUNNING)	1407	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1418	croak ("FATAL: tried to destroy currently running coroutine");
1419		1408
1420	save_perl (aTHX_ &temp);	1409	save_perl (aTHX_ &temp);
1421	load_perl (aTHX_ coro);	1410	load_perl (aTHX_ coro);
1422		1411
1423	coro_destruct (aTHX_ coro);	1412	coro_destruct (aTHX_ coro);
…		…
1474	# define MGf_DUP 0	1463	# define MGf_DUP 0
1475	#endif	1464	#endif
1476	};	1465	};
1477		1466
1478	static void	1467	static void
1479	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1468	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1480	{	1469	{
1481	ta->prev = SvSTATE (prev_sv);	1470	ta->prev = SvSTATE (prev_sv);
1482	ta->next = SvSTATE (next_sv);	1471	ta->next = SvSTATE (next_sv);
1483	TRANSFER_CHECK (*ta);	1472	TRANSFER_CHECK (*ta);
1484	}	1473	}
1485		1474
1486	static void	1475	static void
1487	api_transfer (SV *prev_sv, SV *next_sv)	1476	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1488	{	1477	{
1489	dTHX;
1490	struct transfer_args ta;	1478	struct coro_transfer_args ta;
1491		1479
1492	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1480	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1493	TRANSFER (ta, 1);	1481	TRANSFER (ta, 1);
1494	}	1482	}
1495		1483
1496	/** Coro ********************************************************************/	1484	/** Coro ********************************************************************/
1497		1485
1498	static void	1486	INLINE void
1499	coro_enq (pTHX_ SV *coro_sv)	1487	coro_enq (pTHX_ struct coro *coro)
1500	{	1488	{
1501	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1489	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1502	}	1490	}
1503		1491
1504	static SV *	1492	INLINE SV *
1505	coro_deq (pTHX)	1493	coro_deq (pTHX)
1506	{	1494	{
1507	int prio;	1495	int prio;
1508		1496
1509	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1497	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1512		1500
1513	return 0;	1501	return 0;
1514	}	1502	}
1515		1503
1516	static int	1504	static int
1517	api_ready (SV *coro_sv)	1505	api_ready (pTHX_ SV *coro_sv)
1518	{	1506	{
1519	dTHX;
1520	struct coro *coro;	1507	struct coro *coro;
1521	SV *sv_hook;	1508	SV *sv_hook;
1522	void (*xs_hook)(void);	1509	void (*xs_hook)(void);
1523		1510
1524	if (SvROK (coro_sv))	1511	if (SvROK (coro_sv))
…		…
1529	if (coro->flags & CF_READY)	1516	if (coro->flags & CF_READY)
1530	return 0;	1517	return 0;
1531		1518
1532	coro->flags |= CF_READY;	1519	coro->flags |= CF_READY;
1533		1520
1534	LOCK;
1535
1536	sv_hook = coro_nready ? 0 : coro_readyhook;	1521	sv_hook = coro_nready ? 0 : coro_readyhook;
1537	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1522	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1538		1523
1539	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1524	coro_enq (aTHX_ coro);
1540	++coro_nready;	1525	++coro_nready;
1541		1526
1542	UNLOCK;
1543
1544	if (sv_hook)	1527	if (sv_hook)
1545	{	1528	{
1546	dSP;	1529	dSP;
1547		1530
1548	ENTER;	1531	ENTER;
…		…
1562		1545
1563	return 1;	1546	return 1;
1564	}	1547	}
1565		1548
1566	static int	1549	static int
1567	api_is_ready (SV *coro_sv)	1550	api_is_ready (pTHX_ SV *coro_sv)
1568	{	1551	{
1569	dTHX;
1570
1571	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1552	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1572	}	1553	}
1573		1554
1574	INLINE void	1555	INLINE void
1575	prepare_schedule (pTHX_ struct transfer_args *ta)	1556	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1576	{	1557	{
1577	SV *prev_sv, *next_sv;	1558	SV *prev_sv, *next_sv;
1578		1559
1579	for (;;)	1560	for (;;)
1580	{	1561	{
1581	LOCK;
1582	next_sv = coro_deq (aTHX);	1562	next_sv = coro_deq (aTHX);
1583		1563
1584	/* nothing to schedule: call the idle handler */	1564	/* nothing to schedule: call the idle handler */
1585	if (expect_false (!next_sv))	1565	if (expect_false (!next_sv))
1586	{	1566	{
1587	dSP;	1567	dSP;
1588	UNLOCK;
1589		1568
1590	ENTER;	1569	ENTER;
1591	SAVETMPS;	1570	SAVETMPS;
1592		1571
1593	PUSHMARK (SP);	1572	PUSHMARK (SP);
…		…
1598	FREETMPS;	1577	FREETMPS;
1599	LEAVE;	1578	LEAVE;
1600	continue;	1579	continue;
1601	}	1580	}
1602		1581
1603	ta->next = SvSTATE (next_sv);	1582	ta->next = SvSTATE_hv (next_sv);
1604		1583
1605	/* cannot transfer to destroyed coros, skip and look for next */	1584	/* cannot transfer to destroyed coros, skip and look for next */
1606	if (expect_false (ta->next->flags & CF_DESTROYED))	1585	if (expect_false (ta->next->flags & CF_DESTROYED))
1607	{	1586	{
1608	UNLOCK;
1609	SvREFCNT_dec (next_sv);	1587	SvREFCNT_dec (next_sv);
1610	/* coro_nready has already been taken care of by destroy */	1588	/* coro_nready has already been taken care of by destroy */
1611	continue;	1589	continue;
1612	}	1590	}
1613		1591
1614	--coro_nready;	1592	--coro_nready;
1615	UNLOCK;
1616	break;	1593	break;
1617	}	1594	}
1618		1595
1619	/* free this only after the transfer */	1596	/* free this only after the transfer */
1620	prev_sv = SvRV (coro_current);	1597	prev_sv = SvRV (coro_current);
1621	ta->prev = SvSTATE (prev_sv);	1598	ta->prev = SvSTATE_hv (prev_sv);
1622	TRANSFER_CHECK (*ta);	1599	TRANSFER_CHECK (*ta);
1623	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1600	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1624	ta->next->flags &= ~CF_READY;	1601	ta->next->flags &= ~CF_READY;
1625	SvRV_set (coro_current, next_sv);	1602	SvRV_set (coro_current, next_sv);
1626		1603
1627	LOCK;
1628	free_coro_mortal (aTHX);	1604	free_coro_mortal (aTHX);
1629	coro_mortal = prev_sv;	1605	coro_mortal = prev_sv;
1630	UNLOCK;
1631	}	1606	}
1632		1607
1633	INLINE void	1608	INLINE void
1634	prepare_cede (pTHX_ struct transfer_args *ta)	1609	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1635	{	1610	{
1636	api_ready (coro_current);	1611	api_ready (aTHX_ coro_current);
1637	prepare_schedule (aTHX_ ta);	1612	prepare_schedule (aTHX_ ta);
1638	}	1613	}
1639		1614
		1615	INLINE void
		1616	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1617	{
		1618	SV *prev = SvRV (coro_current);
		1619
		1620	if (coro_nready)
		1621	{
		1622	prepare_schedule (aTHX_ ta);
		1623	api_ready (aTHX_ prev);
		1624	}
		1625	else
		1626	prepare_nop (aTHX_ ta);
		1627	}
		1628
		1629	static void
		1630	api_schedule (pTHX)
		1631	{
		1632	struct coro_transfer_args ta;
		1633
		1634	prepare_schedule (aTHX_ &ta);
		1635	TRANSFER (ta, 1);
		1636	}
		1637
1640	static int	1638	static int
1641	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1639	api_cede (pTHX)
1642	{	1640	{
1643	if (coro_nready)	1641	struct coro_transfer_args ta;
1644	{	1642
1645	SV *prev = SvRV (coro_current);
1646	prepare_schedule (aTHX_ ta);	1643	prepare_cede (aTHX_ &ta);
1647	api_ready (prev);	1644
		1645	if (expect_true (ta.prev != ta.next))
		1646	{
		1647	TRANSFER (ta, 1);
1648	return 1;	1648	return 1;
1649	}	1649	}
1650	else	1650	else
1651	return 0;	1651	return 0;
1652	}	1652	}
1653		1653
1654	static void
1655	api_schedule (void)
1656	{
1657	dTHX;
1658	struct transfer_args ta;
1659
1660	prepare_schedule (aTHX_ &ta);
1661	TRANSFER (ta, 1);
1662	}
1663
1664	static int	1654	static int
1665	api_cede (void)	1655	api_cede_notself (pTHX)
1666	{	1656	{
1667	dTHX;	1657	if (coro_nready)
		1658	{
1668	struct transfer_args ta;	1659	struct coro_transfer_args ta;
1669		1660
1670	prepare_cede (aTHX_ &ta);	1661	prepare_cede_notself (aTHX_ &ta);
1671
1672	if (expect_true (ta.prev != ta.next))
1673	{
1674	TRANSFER (ta, 1);	1662	TRANSFER (ta, 1);
1675	return 1;	1663	return 1;
1676	}	1664	}
1677	else	1665	else
1678	return 0;	1666	return 0;
1679	}	1667	}
1680		1668
1681	static int	1669	static void
1682	api_cede_notself (void)
1683	{
1684	dTHX;
1685	struct transfer_args ta;
1686
1687	if (prepare_cede_notself (aTHX_ &ta))
1688	{
1689	TRANSFER (ta, 1);
1690	return 1;
1691	}
1692	else
1693	return 0;
1694	}
1695
1696	static void
1697	api_trace (SV *coro_sv, int flags)	1670	api_trace (pTHX_ SV *coro_sv, int flags)
1698	{	1671	{
1699	dTHX;
1700	struct coro *coro = SvSTATE (coro_sv);	1672	struct coro *coro = SvSTATE (coro_sv);
1701		1673
1702	if (flags & CC_TRACE)	1674	if (flags & CC_TRACE)
1703	{	1675	{
1704	if (!coro->cctx)	1676	if (!coro->cctx)
1705	coro->cctx = cctx_new_run ();	1677	coro->cctx = cctx_new_run ();
1706	else if (!(coro->cctx->flags & CC_TRACE))	1678	else if (!(coro->cctx->flags & CC_TRACE))
1707	croak ("cannot enable tracing on coroutine with custom stack");	1679	croak ("cannot enable tracing on coroutine with custom stack,");
1708		1680
1709	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1681	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1710	}	1682	}
1711	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1683	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1712	{	1684	{
…		…
1717	else	1689	else
1718	coro->slot->runops = RUNOPS_DEFAULT;	1690	coro->slot->runops = RUNOPS_DEFAULT;
1719	}	1691	}
1720	}	1692	}
1721		1693
1722	#if 0
1723	static int
1724	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1725	{
1726	AV *padlist;
1727	AV *av = (AV *)mg->mg_obj;
1728
1729	abort ();
1730
1731	return 0;
1732	}
1733
1734	static MGVTBL coro_gensub_vtbl = {
1735	0, 0, 0, 0,
1736	coro_gensub_free
1737	};
1738	#endif
1739
1740	/*****************************************************************************/	1694	/*****************************************************************************/
1741	/* PerlIO::cede */	1695	/* PerlIO::cede */
1742		1696
1743	typedef struct	1697	typedef struct
1744	{	1698	{
…		…
1771	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1725	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1772	double now = nvtime ();	1726	double now = nvtime ();
1773		1727
1774	if (now >= self->next)	1728	if (now >= self->next)
1775	{	1729	{
1776	api_cede ();	1730	api_cede (aTHX);
1777	self->next = now + self->every;	1731	self->next = now + self->every;
1778	}	1732	}
1779		1733
1780	return PerlIOBuf_flush (aTHX_ f);	1734	return PerlIOBuf_flush (aTHX_ f);
1781	}	1735	}
…		…
1810	PerlIOBuf_get_ptr,	1764	PerlIOBuf_get_ptr,
1811	PerlIOBuf_get_cnt,	1765	PerlIOBuf_get_cnt,
1812	PerlIOBuf_set_ptrcnt,	1766	PerlIOBuf_set_ptrcnt,
1813	};	1767	};
1814		1768
		1769	/*****************************************************************************/
		1770
		1771	static const CV *slf_cv; /* for quick consistency check */
		1772
		1773	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1774	static SV *slf_arg0;
		1775	static SV *slf_arg1;
		1776	static SV *slf_arg2;
		1777
		1778	/* this restores the stack in the case we patched the entersub, to */
		1779	/* recreate the stack frame as perl will on following calls */
		1780	/* since entersub cleared the stack */
		1781	static OP *
		1782	pp_restore (pTHX)
		1783	{
		1784	dSP;
		1785
		1786	PUSHMARK (SP);
		1787
		1788	EXTEND (SP, 3);
		1789	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1790	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1791	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1792	PUSHs ((SV *)CvGV (slf_cv));
		1793
		1794	RETURNOP (slf_restore.op_first);
		1795	}
		1796
		1797	static void
		1798	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1799	{
		1800	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1801	}
		1802
		1803	static void
		1804	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1805	{
		1806	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1807
		1808	frame->prepare = slf_prepare_set_stacklevel;
		1809	frame->check = slf_check_nop;
		1810	frame->data = (void *)SvIV (arg [0]);
		1811	}
		1812
		1813	static void
		1814	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1815	{
		1816	SV **arg = (SV **)slf_frame.data;
		1817
		1818	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1819
		1820	/* if the destination has ->throw set, then copy it */
		1821	/* into the current coro's throw slot, so it will be raised */
		1822	/* after the schedule */
		1823	if (expect_false (ta->next->throw))
		1824	{
		1825	struct coro *coro = SvSTATE_current;
		1826	SvREFCNT_dec (coro->throw);
		1827	coro->throw = ta->next->throw;
		1828	ta->next->throw = 0;
		1829	}
		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	*/
		1873	static OP *
		1874	pp_slf (pTHX)
		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 */
		1884	dSP;
		1885	SV **arg = PL_stack_base + TOPMARK + 1;
		1886	int items = SP - arg; /* args without function object */
		1887	SV *gv = *sp;
		1888
		1889	/* do a quick consistency check on the "function" object, and if it isn't */
		1890	/* for us, divert to the real entersub */
		1891	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1892	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1893
		1894	if (!(PL_op->op_flags & OPf_STACKED))
		1895	{
		1896	/* ampersand-form of call, use @_ instead of stack */
		1897	AV *av = GvAV (PL_defgv);
		1898	arg = AvARRAY (av);
		1899	items = AvFILLp (av) + 1;
		1900	}
		1901
		1902	PUTBACK;
		1903
		1904	/* now call the init function, which needs to set up slf_frame */
		1905	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1906	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1907
		1908	/* pop args */
		1909	SP = PL_stack_base + POPMARK;
		1910
		1911	PUTBACK;
		1912	}
		1913
		1914	/* now that we have a slf_frame, interpret it! */
		1915	/* we use a callback system not to make the code needlessly */
		1916	/* complicated, but so we can run multiple perl coros from one cctx */
		1917
		1918	do
		1919	{
		1920	struct coro_transfer_args ta;
		1921
		1922	slf_frame.prepare (aTHX_ &ta);
		1923	TRANSFER (ta, 0);
		1924
		1925	checkmark = PL_stack_sp - PL_stack_base;
		1926	}
		1927	while (slf_frame.check (aTHX_ &slf_frame));
		1928
		1929	{
		1930	dSP;
		1931	SV **bot = PL_stack_base + checkmark;
		1932	int gimme = GIMME_V;
		1933
		1934	slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
		1935
		1936	/* make sure we put something on the stack in scalar context */
		1937	if (gimme == G_SCALAR)
		1938	{
		1939	if (sp == bot)
		1940	XPUSHs (&PL_sv_undef);
		1941
		1942	SP = bot + 1;
		1943	}
		1944
		1945	PUTBACK;
		1946	}
		1947
		1948	{
		1949	struct coro *coro = SvSTATE_current;
		1950
		1951	if (expect_false (coro->throw))
		1952	{
		1953	SV *exception = sv_2mortal (coro->throw);
		1954
		1955	coro->throw = 0;
		1956	sv_setsv (ERRSV, exception);
		1957	croak (0);
		1958	}
		1959	}
		1960
		1961	return NORMAL;
		1962	}
		1963
		1964	static void
		1965	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
		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	if (items > 3)
		1974	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
		1975
		1976	CvFLAGS (cv) |= CVf_SLF;
		1977	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1978	slf_cv = cv;
		1979
		1980	/* we patch the op, and then re-run the whole call */
		1981	/* we have to put the same argument on the stack for this to work */
		1982	/* and this will be done by pp_restore */
		1983	slf_restore.op_next = (OP *)&slf_restore;
		1984	slf_restore.op_type = OP_CUSTOM;
		1985	slf_restore.op_ppaddr = pp_restore;
		1986	slf_restore.op_first = PL_op;
		1987
		1988	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		1989	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		1990	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
		1991
		1992	PL_op->op_ppaddr = pp_slf;
		1993
		1994	PL_op = (OP *)&slf_restore;
		1995	}
		1996
		1997	/*****************************************************************************/
		1998
		1999	static void
		2000	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2001	{
		2002	SV *count_sv = AvARRAY (av)[0];
		2003	IV count = SvIVX (count_sv);
		2004
		2005	count += adjust;
		2006	SvIVX (count_sv) = count;
		2007
		2008	/* now wake up as many waiters as are expected to lock */
		2009	while (count > 0 && AvFILLp (av) > 0)
		2010	{
		2011	SV *cb;
		2012
		2013	/* swap first two elements so we can shift a waiter */
		2014	AvARRAY (av)[0] = AvARRAY (av)[1];
		2015	AvARRAY (av)[1] = count_sv;
		2016	cb = av_shift (av);
		2017
		2018	if (SvOBJECT (cb))
		2019	api_ready (aTHX_ cb);
		2020	else
		2021	croak ("callbacks not yet supported");
		2022
		2023	SvREFCNT_dec (cb);
		2024
		2025	--count;
		2026	}
		2027	}
		2028
		2029	static void
		2030	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2031	{
		2032	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2033	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2034	}
		2035
		2036	static int
		2037	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2038	{
		2039	AV *av = (AV *)frame->data;
		2040	SV *count_sv = AvARRAY (av)[0];
		2041
		2042	if (SvIVX (count_sv) > 0)
		2043	{
		2044	SvSTATE_current->on_destroy = 0;
		2045	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2046	return 0;
		2047	}
		2048	else
		2049	{
		2050	int i;
		2051	/* if we were woken up but can't down, we look through the whole */
		2052	/* waiters list and only add us if we aren't in there already */
		2053	/* this avoids some degenerate memory usage cases */
		2054
		2055	for (i = 1; i <= AvFILLp (av); ++i)
		2056	if (AvARRAY (av)[i] == SvRV (coro_current))
		2057	return 1;
		2058
		2059	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2060	return 1;
		2061	}
		2062	}
		2063
		2064	static void
		2065	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2066	{
		2067	AV *av = (AV *)SvRV (arg [0]);
		2068
		2069	if (SvIVX (AvARRAY (av)[0]) > 0)
		2070	{
		2071	frame->data = (void *)av;
		2072	frame->prepare = prepare_nop;
		2073	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2074	}
		2075	else
		2076	{
		2077	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2078
		2079	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2080	frame->prepare = prepare_schedule;
		2081
		2082	/* to avoid race conditions when a woken-up coro gets terminated */
		2083	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2084	assert (!SvSTATE_current->on_destroy);//D
		2085	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2086	}
		2087
		2088	frame->check = slf_check_semaphore_down;
		2089
		2090	}
		2091
		2092	/*****************************************************************************/
		2093
		2094	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2095
		2096	/* create a closure from XS, returns a code reference */
		2097	/* the arg can be accessed via GENSUB_ARG from the callback */
		2098	/* the callback must use dXSARGS/XSRETURN */
		2099	static SV *
		2100	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2101	{
		2102	CV *cv = (CV *)NEWSV (0, 0);
		2103
		2104	sv_upgrade ((SV *)cv, SVt_PVCV);
		2105
		2106	CvANON_on (cv);
		2107	CvISXSUB_on (cv);
		2108	CvXSUB (cv) = xsub;
		2109	GENSUB_ARG = arg;
		2110
		2111	return newRV_noinc ((SV *)cv);
		2112	}
		2113
		2114	/*****************************************************************************/
1815		2115
1816	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2116	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1817		2117
1818	PROTOTYPES: DISABLE	2118	PROTOTYPES: DISABLE
1819		2119
1820	BOOT:	2120	BOOT:
1821	{	2121	{
1822	#ifdef USE_ITHREADS	2122	#ifdef USE_ITHREADS
1823	MUTEX_INIT (&coro_lock);
1824	# if CORO_PTHREAD	2123	# if CORO_PTHREAD
1825	coro_thx = PERL_GET_CONTEXT;	2124	coro_thx = PERL_GET_CONTEXT;
1826	# endif	2125	# endif
1827	#endif	2126	#endif
1828	BOOT_PAGESIZE;	2127	BOOT_PAGESIZE;
…		…
1849	main_top_env = PL_top_env;	2148	main_top_env = PL_top_env;
1850		2149
1851	while (main_top_env->je_prev)	2150	while (main_top_env->je_prev)
1852	main_top_env = main_top_env->je_prev;	2151	main_top_env = main_top_env->je_prev;
1853		2152
		2153	{
		2154	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2155
		2156	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2157	hv_store_ent (PL_custom_op_names, slf,
		2158	newSVpv ("coro_slf", 0), 0);
		2159
		2160	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2161	hv_store_ent (PL_custom_op_descs, slf,
		2162	newSVpv ("coro schedule like function", 0), 0);
		2163	}
		2164
1854	coroapi.ver = CORO_API_VERSION;	2165	coroapi.ver = CORO_API_VERSION;
1855	coroapi.rev = CORO_API_REVISION;	2166	coroapi.rev = CORO_API_REVISION;
		2167
1856	coroapi.transfer = api_transfer;	2168	coroapi.transfer = api_transfer;
		2169
		2170	coroapi.sv_state = SvSTATE_;
		2171	coroapi.execute_slf = api_execute_slf;
		2172	coroapi.prepare_nop = prepare_nop;
		2173	coroapi.prepare_schedule = prepare_schedule;
		2174	coroapi.prepare_cede = prepare_cede;
		2175	coroapi.prepare_cede_notself = prepare_cede_notself;
1857		2176
1858	{	2177	{
1859	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2178	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1860		2179
1861	if (!svp) croak ("Time::HiRes is required");	2180	if (!svp) croak ("Time::HiRes is required");
…		…
1894	av_push (coro->args, newSVsv (ST (i)));	2213	av_push (coro->args, newSVsv (ST (i)));
1895	}	2214	}
1896	OUTPUT:	2215	OUTPUT:
1897	RETVAL	2216	RETVAL
1898		2217
1899	# these not obviously related functions are all rolled into the same xs
1900	# function to increase chances that they all will call transfer with the same
1901	# stack offset
1902	void	2218	void
1903	_set_stacklevel (...)	2219	_set_stacklevel (...)
1904	ALIAS:	2220	CODE:
1905	Coro::State::transfer = 1	2221	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1906	Coro::schedule = 2
1907	Coro::cede = 3
1908	Coro::cede_notself = 4
1909	CODE:
1910	{
1911	struct transfer_args ta;
1912		2222
1913	PUTBACK;	2223	void
1914	switch (ix)	2224	transfer (...)
1915	{	2225	PROTOTYPE: $$
1916	case 0:	2226	CODE:
1917	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (ST (0)));	2227	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1918	break;
1919
1920	case 1:
1921	if (items != 2)
1922	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1923
1924	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1925	break;
1926
1927	case 2:
1928	prepare_schedule (aTHX_ &ta);
1929	break;
1930
1931	case 3:
1932	prepare_cede (aTHX_ &ta);
1933	break;
1934
1935	case 4:
1936	if (!prepare_cede_notself (aTHX_ &ta))
1937	XSRETURN_EMPTY;
1938
1939	break;
1940	}
1941	SPAGAIN;
1942
1943	BARRIER;
1944	PUTBACK;
1945	TRANSFER (ta, 0);
1946	SPAGAIN; /* might be the sp of a different coroutine now */
1947	/* be extra careful not to ever do anything after TRANSFER */
1948	}
1949		2228
1950	bool	2229	bool
1951	_destroy (SV *coro_sv)	2230	_destroy (SV *coro_sv)
1952	CODE:	2231	CODE:
1953	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2232	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1960	CODE:	2239	CODE:
1961	_exit (code);	2240	_exit (code);
1962		2241
1963	int	2242	int
1964	cctx_stacksize (int new_stacksize = 0)	2243	cctx_stacksize (int new_stacksize = 0)
		2244	PROTOTYPE: ;$
1965	CODE:	2245	CODE:
1966	RETVAL = cctx_stacksize;	2246	RETVAL = cctx_stacksize;
1967	if (new_stacksize)	2247	if (new_stacksize)
1968	{	2248	{
1969	cctx_stacksize = new_stacksize;	2249	cctx_stacksize = new_stacksize;
…		…
1972	OUTPUT:	2252	OUTPUT:
1973	RETVAL	2253	RETVAL
1974		2254
1975	int	2255	int
1976	cctx_max_idle (int max_idle = 0)	2256	cctx_max_idle (int max_idle = 0)
		2257	PROTOTYPE: ;$
1977	CODE:	2258	CODE:
1978	RETVAL = cctx_max_idle;	2259	RETVAL = cctx_max_idle;
1979	if (max_idle > 1)	2260	if (max_idle > 1)
1980	cctx_max_idle = max_idle;	2261	cctx_max_idle = max_idle;
1981	OUTPUT:	2262	OUTPUT:
1982	RETVAL	2263	RETVAL
1983		2264
1984	int	2265	int
1985	cctx_count ()	2266	cctx_count ()
		2267	PROTOTYPE:
1986	CODE:	2268	CODE:
1987	RETVAL = cctx_count;	2269	RETVAL = cctx_count;
1988	OUTPUT:	2270	OUTPUT:
1989	RETVAL	2271	RETVAL
1990		2272
1991	int	2273	int
1992	cctx_idle ()	2274	cctx_idle ()
		2275	PROTOTYPE:
1993	CODE:	2276	CODE:
1994	RETVAL = cctx_idle;	2277	RETVAL = cctx_idle;
1995	OUTPUT:	2278	OUTPUT:
1996	RETVAL	2279	RETVAL
1997		2280
1998	void	2281	void
1999	list ()	2282	list ()
		2283	PROTOTYPE:
2000	PPCODE:	2284	PPCODE:
2001	{	2285	{
2002	struct coro *coro;	2286	struct coro *coro;
2003	for (coro = coro_first; coro; coro = coro->next)	2287	for (coro = coro_first; coro; coro = coro->next)
2004	if (coro->hv)	2288	if (coro->hv)
…		…
2071	SvREFCNT_dec (self->throw);	2355	SvREFCNT_dec (self->throw);
2072	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2356	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2073		2357
2074	void	2358	void
2075	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2359	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2360	PROTOTYPE: $;$
		2361	C_ARGS: aTHX_ coro, flags
2076		2362
2077	SV *	2363	SV *
2078	has_cctx (Coro::State coro)	2364	has_cctx (Coro::State coro)
2079	PROTOTYPE: $	2365	PROTOTYPE: $
2080	CODE:	2366	CODE:
…		…
2104	OUTPUT:	2390	OUTPUT:
2105	RETVAL	2391	RETVAL
2106		2392
2107	void	2393	void
2108	force_cctx ()	2394	force_cctx ()
		2395	PROTOTYPE:
2109	CODE:	2396	CODE:
2110	struct coro *coro = SvSTATE (coro_current);
2111	coro->cctx->idle_sp = 0;	2397	SvSTATE_current->cctx->idle_sp = 0;
2112		2398
2113	void	2399	void
2114	swap_defsv (Coro::State self)	2400	swap_defsv (Coro::State self)
2115	PROTOTYPE: $	2401	PROTOTYPE: $
2116	ALIAS:	2402	ALIAS:
2117	swap_defav = 1	2403	swap_defav = 1
2118	CODE:	2404	CODE:
2119	if (!self->slot)	2405	if (!self->slot)
2120	croak ("cannot swap state with coroutine that has no saved state");	2406	croak ("cannot swap state with coroutine that has no saved state,");
2121	else	2407	else
2122	{	2408	{
2123	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2409	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2124	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2410	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2125		2411
…		…
2157	coroapi.schedule = api_schedule;	2443	coroapi.schedule = api_schedule;
2158	coroapi.cede = api_cede;	2444	coroapi.cede = api_cede;
2159	coroapi.cede_notself = api_cede_notself;	2445	coroapi.cede_notself = api_cede_notself;
2160	coroapi.ready = api_ready;	2446	coroapi.ready = api_ready;
2161	coroapi.is_ready = api_is_ready;	2447	coroapi.is_ready = api_is_ready;
2162	coroapi.nready = &coro_nready;	2448	coroapi.nready = coro_nready;
2163	coroapi.current = coro_current;	2449	coroapi.current = coro_current;
2164		2450
2165	GCoroAPI = &coroapi;	2451	GCoroAPI = &coroapi;
2166	sv_setiv (sv, (IV)&coroapi);	2452	sv_setiv (sv, (IV)&coroapi);
2167	SvREADONLY_on (sv);	2453	SvREADONLY_on (sv);
2168	}	2454	}
2169	}	2455	}
		2456
		2457	void
		2458	schedule (...)
		2459	CODE:
		2460	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
		2461
		2462	void
		2463	cede (...)
		2464	CODE:
		2465	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
		2466
		2467	void
		2468	cede_notself (...)
		2469	CODE:
		2470	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2170		2471
2171	void	2472	void
2172	_set_current (SV *current)	2473	_set_current (SV *current)
2173	PROTOTYPE: $	2474	PROTOTYPE: $
2174	CODE:	2475	CODE:
…		…
2177		2478
2178	void	2479	void
2179	_set_readyhook (SV *hook)	2480	_set_readyhook (SV *hook)
2180	PROTOTYPE: $	2481	PROTOTYPE: $
2181	CODE:	2482	CODE:
2182	LOCK;
2183	SvREFCNT_dec (coro_readyhook);	2483	SvREFCNT_dec (coro_readyhook);
2184	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2484	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2185	UNLOCK;
2186		2485
2187	int	2486	int
2188	prio (Coro::State coro, int newprio = 0)	2487	prio (Coro::State coro, int newprio = 0)
		2488	PROTOTYPE: $;$
2189	ALIAS:	2489	ALIAS:
2190	nice = 1	2490	nice = 1
2191	CODE:	2491	CODE:
2192	{	2492	{
2193	RETVAL = coro->prio;	2493	RETVAL = coro->prio;
…		…
2208		2508
2209	SV *	2509	SV *
2210	ready (SV *self)	2510	ready (SV *self)
2211	PROTOTYPE: $	2511	PROTOTYPE: $
2212	CODE:	2512	CODE:
2213	RETVAL = boolSV (api_ready (self));	2513	RETVAL = boolSV (api_ready (aTHX_ self));
2214	OUTPUT:	2514	OUTPUT:
2215	RETVAL	2515	RETVAL
2216		2516
2217	int	2517	int
2218	nready (...)	2518	nready (...)
…		…
2225	# for async_pool speedup	2525	# for async_pool speedup
2226	void	2526	void
2227	_pool_1 (SV *cb)	2527	_pool_1 (SV *cb)
2228	CODE:	2528	CODE:
2229	{	2529	{
2230	struct coro *coro = SvSTATE (coro_current);
2231	HV *hv = (HV *)SvRV (coro_current);	2530	HV *hv = (HV *)SvRV (coro_current);
		2531	struct coro *coro = SvSTATE_hv ((SV *)hv);
2232	AV *defav = GvAV (PL_defgv);	2532	AV *defav = GvAV (PL_defgv);
2233	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2533	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2234	AV *invoke_av;	2534	AV *invoke_av;
2235	int i, len;	2535	int i, len;
2236		2536
…		…
2257	{	2557	{
2258	av_fill (defav, len - 1);	2558	av_fill (defav, len - 1);
2259	for (i = 0; i < len; ++i)	2559	for (i = 0; i < len; ++i)
2260	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2560	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2261	}	2561	}
2262
2263	SvREFCNT_dec (invoke);
2264	}	2562	}
2265		2563
2266	void	2564	void
2267	_pool_2 (SV *cb)	2565	_pool_2 (SV *cb)
2268	CODE:	2566	CODE:
2269	{	2567	{
2270	struct coro *coro = SvSTATE (coro_current);	2568	struct coro *coro = SvSTATE_current;
2271		2569
2272	sv_setsv (cb, &PL_sv_undef);	2570	sv_setsv (cb, &PL_sv_undef);
2273		2571
2274	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2572	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2275	coro->saved_deffh = 0;	2573	coro->saved_deffh = 0;
…		…
2288	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2586	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2289		2587
2290	coro->prio = 0;	2588	coro->prio = 0;
2291		2589
2292	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2590	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2293	api_trace (coro_current, 0);	2591	api_trace (aTHX_ coro_current, 0);
2294		2592
2295	av_push (av_async_pool, newSVsv (coro_current));	2593	av_push (av_async_pool, newSVsv (coro_current));
2296	}	2594	}
2297
2298	#if 0
2299
2300	void
2301	_generator_call (...)
2302	PROTOTYPE: @
2303	PPCODE:
2304	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2305	xxxx
2306	abort ();
2307
2308	SV *
2309	gensub (SV *sub, ...)
2310	PROTOTYPE: &;@
2311	CODE:
2312	{
2313	struct coro *coro;
2314	MAGIC *mg;
2315	CV *xcv;
2316	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2317	int i;
2318
2319	CvGV (ncv) = CvGV (cv);
2320	CvFILE (ncv) = CvFILE (cv);
2321
2322	Newz (0, coro, 1, struct coro);
2323	coro->args = newAV ();
2324	coro->flags = CF_NEW;
2325
2326	av_extend (coro->args, items - 1);
2327	for (i = 1; i < items; i++)
2328	av_push (coro->args, newSVsv (ST (i)));
2329
2330	CvISXSUB_on (ncv);
2331	CvXSUBANY (ncv).any_ptr = (void *)coro;
2332
2333	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2334
2335	CvXSUB (ncv) = CvXSUB (xcv);
2336	CvANON_on (ncv);
2337
2338	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2339	RETVAL = newRV_noinc ((SV *)ncv);
2340	}
2341	OUTPUT:
2342	RETVAL
2343
2344	#endif
2345		2595
2346		2596
2347	MODULE = Coro::State PACKAGE = Coro::AIO	2597	MODULE = Coro::State PACKAGE = Coro::AIO
2348		2598
2349	void	2599	void
2350	_get_state (SV *self)	2600	_get_state (SV *self)
		2601	PROTOTYPE: $
2351	PPCODE:	2602	PPCODE:
2352	{	2603	{
2353	AV *defav = GvAV (PL_defgv);	2604	AV *defav = GvAV (PL_defgv);
2354	AV *av = newAV ();	2605	AV *av = newAV ();
2355	int i;	2606	int i;
…		…
2370		2621
2371	av_push (av, data_sv);	2622	av_push (av, data_sv);
2372		2623
2373	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2624	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2374		2625
2375	api_ready (self);	2626	api_ready (aTHX_ self);
2376	}	2627	}
2377		2628
2378	void	2629	void
2379	_set_state (SV *state)	2630	_set_state (SV *state)
2380	PROTOTYPE: $	2631	PROTOTYPE: $
…		…
2398	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2649	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2399		2650
2400	BOOT:	2651	BOOT:
2401	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2652	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2402		2653
2403	SV *	2654	void
2404	_schedule (...)	2655	_schedule (...)
2405	PROTOTYPE: @
2406	CODE:	2656	CODE:
2407	{	2657	{
2408	static int incede;	2658	static int incede;
2409		2659
2410	api_cede_notself ();	2660	api_cede_notself (aTHX);
2411		2661
2412	++incede;	2662	++incede;
2413	while (coro_nready >= incede && api_cede ())	2663	while (coro_nready >= incede && api_cede (aTHX))
2414	;	2664	;
2415		2665
2416	sv_setsv (sv_activity, &PL_sv_undef);	2666	sv_setsv (sv_activity, &PL_sv_undef);
2417	if (coro_nready >= incede)	2667	if (coro_nready >= incede)
2418	{	2668	{
…		…
2429	MODULE = Coro::State PACKAGE = PerlIO::cede	2679	MODULE = Coro::State PACKAGE = PerlIO::cede
2430		2680
2431	BOOT:	2681	BOOT:
2432	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2682	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2433		2683
		2684	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2685
		2686	SV *
		2687	new (SV *klass, SV *count_ = 0)
		2688	CODE:
		2689	{
		2690	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2691	AV *av = newAV ();
		2692	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2693	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2694	}
		2695	OUTPUT:
		2696	RETVAL
		2697
		2698	SV *
		2699	count (SV *self)
		2700	CODE:
		2701	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2702	OUTPUT:
		2703	RETVAL
		2704
		2705	void
		2706	up (SV *self, int adjust = 1)
		2707	ALIAS:
		2708	adjust = 1
		2709	CODE:
		2710	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
		2711
		2712	void
		2713	down (SV *self)
		2714	CODE:
		2715	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
		2716
		2717	void
		2718	try (SV *self)
		2719	PPCODE:
		2720	{
		2721	AV *av = (AV *)SvRV (self);
		2722	SV *count_sv = AvARRAY (av)[0];
		2723	IV count = SvIVX (count_sv);
		2724
		2725	if (count > 0)
		2726	{
		2727	--count;
		2728	SvIVX (count_sv) = count;
		2729	XSRETURN_YES;
		2730	}
		2731	else
		2732	XSRETURN_NO;
		2733	}
		2734
		2735	void
		2736	waiters (SV *self)
		2737	CODE:
		2738	{
		2739	AV *av = (AV *)SvRV (self);
		2740
		2741	if (GIMME_V == G_SCALAR)
		2742	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2743	else
		2744	{
		2745	int i;
		2746	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2747	for (i = 1; i <= AvFILLp (av); ++i)
		2748	PUSHs (newSVsv (AvARRAY (av)[i]));
		2749	}
		2750	}
		2751

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