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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.265 by root, Fri Nov 14 02:42:26 2008 UTC vs.
Revision 1.289 by root, Mon Nov 17 08:25:06 2008 UTC

…		…
95	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
96	#endif	96	#endif
97	#ifndef newSV	97	#ifndef newSV
98	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
99	#endif	99	#endif
		100	#ifndef CvISXSUB_on
		101	# define CvISXSUB_on(cv) (void)cv
		102	#endif
100		103
101	/* 5.8.7 */	104	/* 5.8.7 */
102	#ifndef SvRV_set	105	#ifndef SvRV_set
103	# define SvRV_set(s,v) SvRV(s) = (v)	106	# define SvRV_set(s,v) SvRV(s) = (v)
104	#endif	107	#endif
…		…
116	# define CORO_PREFER_PERL_FUNCTIONS 0	119	# define CORO_PREFER_PERL_FUNCTIONS 0
117	#endif	120	#endif
118		121
119	/* The next macros try to return the current stack pointer, in an as	122	/* The next macros try to return the current stack pointer, in an as
120	* portable way as possible. */	123	* portable way as possible. */
121	#define dSTACKLEVEL volatile char stacklevel	124	#if __GNUC__ >= 4
122	#define STACKLEVEL ((void *)&stacklevel)	125	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
		126	#else
		127	# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
		128	#endif
123		129
124	#define IN_DESTRUCT (PL_main_cv == Nullcv)	130	#define IN_DESTRUCT (PL_main_cv == Nullcv)
125		131
126	#if __GNUC__ >= 3	132	#if __GNUC__ >= 3
127	# define attribute(x) __attribute__(x)	133	# define attribute(x) __attribute__(x)
…		…
139	#define NOINLINE attribute ((noinline))	145	#define NOINLINE attribute ((noinline))
140		146
141	#include "CoroAPI.h"	147	#include "CoroAPI.h"
142		148
143	#ifdef USE_ITHREADS	149	#ifdef USE_ITHREADS
144
145	static perl_mutex coro_lock;
146	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148	# if CORO_PTHREAD	150	# if CORO_PTHREAD
149	static void *coro_thx;	151	static void *coro_thx;
150	# endif	152	# endif
151
152	#else
153
154	# define LOCK (void)0
155	# define UNLOCK (void)0
156
157	#endif	153	#endif
158
159	# undef LOCK
160	# define LOCK (void)0
161	# undef UNLOCK
162	# define UNLOCK (void)0
163
164	/* helper storage struct for Coro::AIO */
165	struct io_state
166	{
167	AV *res;
168	int errorno;
169	I32 laststype; /* U16 in 5.10.0 */
170	int laststatval;
171	Stat_t statcache;
172	};
173		154
174	static double (*nvtime)(); /* so why doesn't it take void? */	155	static double (*nvtime)(); /* so why doesn't it take void? */
175		156
176	static U32 cctx_gen;	157	static U32 cctx_gen;
177	static size_t cctx_stacksize = CORO_STACKSIZE;	158	static size_t cctx_stacksize = CORO_STACKSIZE;
178	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
179	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
180	static JMPENV *main_top_env;	161	static JMPENV *main_top_env;
181	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
182	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */	163	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183	static volatile struct coro *transfer_next;
184
185	struct transfer_args
186	{
187	struct coro *prev, *next;
188	};
189		164
190	static GV *irsgv; /* $/ */	165	static GV *irsgv; /* $/ */
191	static GV *stdoutgv; /* *STDOUT */	166	static GV *stdoutgv; /* *STDOUT */
192	static SV *rv_diehook;	167	static SV *rv_diehook;
193	static SV *rv_warnhook;	168	static SV *rv_warnhook;
…		…
212	CC_TRACE_LINE = 0x10, /* trace each statement */	187	CC_TRACE_LINE = 0x10, /* trace each statement */
213	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214	};	189	};
215		190
216	/* this is a structure representing a c-level coroutine */	191	/* this is a structure representing a c-level coroutine */
217	typedef struct coro_cctx {	192	typedef struct coro_cctx
		193	{
218	struct coro_cctx *next;	194	struct coro_cctx *next;
219		195
220	/* the stack */	196	/* the stack */
221	void *sptr;	197	void *sptr;
222	size_t ssize;	198	size_t ssize;
…		…
240	CF_NEW = 0x0004, /* has never been switched to */	216	CF_NEW = 0x0004, /* has never been switched to */
241	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	217	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242	};	218	};
243		219
244	/* the structure where most of the perl state is stored, overlaid on the cxstack */	220	/* the structure where most of the perl state is stored, overlaid on the cxstack */
245	typedef struct {	221	typedef struct
		222	{
246	SV *defsv;	223	SV *defsv;
247	AV *defav;	224	AV *defav;
248	SV *errsv;	225	SV *errsv;
249	SV *irsgv;	226	SV *irsgv;
250	#define VAR(name,type) type name;	227	#define VAR(name,type) type name;
…		…
254		231
255	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	232	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256		233
257	/* this is a structure representing a perl-level coroutine */	234	/* this is a structure representing a perl-level coroutine */
258	struct coro {	235	struct coro {
259	/* the c coroutine allocated to this perl coroutine, if any */	236	/* the C coroutine allocated to this perl coroutine, if any */
260	coro_cctx *cctx;	237	coro_cctx *cctx;
261		238
262	/* process data */	239	/* state data */
		240	struct CoroSLF slf_frame; /* saved slf frame */
263	AV *mainstack;	241	AV *mainstack;
264	perl_slots *slot; /* basically the saved sp */	242	perl_slots *slot; /* basically the saved sp */
265		243
266	AV *args; /* data associated with this coroutine (initial args) */	244	AV *args; /* data associated with this coroutine (initial args) */
267	int refcnt; /* coroutines are refcounted, yes */	245	int refcnt; /* coroutines are refcounted, yes */
268	int flags; /* CF_ flags */	246	int flags; /* CF_ flags */
269	HV *hv; /* the perl hash associated with this coro, if any */	247	HV *hv; /* the perl hash associated with this coro, if any */
		248	void (*on_destroy)(pTHX_ struct coro *coro);
270		249
271	/* statistics */	250	/* statistics */
272	int usecount; /* number of transfers to this coro */	251	int usecount; /* number of transfers to this coro */
273		252
274	/* coro process data */	253	/* coro process data */
…		…
282	struct coro *next, *prev;	261	struct coro *next, *prev;
283	};	262	};
284		263
285	typedef struct coro *Coro__State;	264	typedef struct coro *Coro__State;
286	typedef struct coro *Coro__State_or_hashref;	265	typedef struct coro *Coro__State_or_hashref;
		266
		267	/* the following variables are effectively part of the perl context */
		268	/* and get copied between struct coro and these variables */
		269	/* the mainr easonw e don't support windows process emulation */
		270	static struct CoroSLF slf_frame; /* the current slf frame */
		271	static SV *coro_throw;
287		272
288	/** Coro ********************************************************************/	273	/** Coro ********************************************************************/
289		274
290	#define PRIO_MAX 3	275	#define PRIO_MAX 3
291	#define PRIO_HIGH 1	276	#define PRIO_HIGH 1
…		…
296		281
297	/* for Coro.pm */	282	/* for Coro.pm */
298	static SV *coro_current;	283	static SV *coro_current;
299	static SV *coro_readyhook;	284	static SV *coro_readyhook;
300	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	285	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301	static int coro_nready;
302	static struct coro *coro_first;	286	static struct coro *coro_first;
		287	#define coro_nready coroapi.nready
303		288
304	/** lowlevel stuff **********************************************************/	289	/** lowlevel stuff **********************************************************/
305		290
306	static SV *	291	static SV *
307	coro_get_sv (pTHX_ const char *name, int create)	292	coro_get_sv (pTHX_ const char *name, int create)
…		…
392	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	377	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
393		378
394	return 0;	379	return 0;
395	}	380	}
396		381
397	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	382	#define CORO_MAGIC_type_cv 26
398	#define CORO_MAGIC_type_state PERL_MAGIC_ext	383	#define CORO_MAGIC_type_state PERL_MAGIC_ext
399		384
400	static MGVTBL coro_cv_vtbl = {	385	static MGVTBL coro_cv_vtbl = {
401	0, 0, 0, 0,	386	0, 0, 0, 0,
402	coro_cv_free	387	coro_cv_free
403	};	388	};
404		389
		390	#define CORO_MAGIC_NN(sv, type) \
		391	(expect_true (SvMAGIC (sv)->mg_type == type) \
		392	? SvMAGIC (sv) \
		393	: mg_find (sv, type))
		394
405	#define CORO_MAGIC(sv, type) \	395	#define CORO_MAGIC(sv, type) \
406	SvMAGIC (sv) \	396	(expect_true (SvMAGIC (sv)) \
407	? SvMAGIC (sv)->mg_type == type \	397	? CORO_MAGIC_NN (sv, type) \
408	? SvMAGIC (sv) \
409	: mg_find (sv, type) \
410	: 0	398	: 0)
411		399
412	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	400	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	401	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
414		402
415	INLINE struct coro *	403	INLINE struct coro *
416	SvSTATE_ (pTHX_ SV *coro)	404	SvSTATE_ (pTHX_ SV *coro)
417	{	405	{
418	HV *stash;	406	HV *stash;
…		…
435	mg = CORO_MAGIC_state (coro);	423	mg = CORO_MAGIC_state (coro);
436	return (struct coro *)mg->mg_ptr;	424	return (struct coro *)mg->mg_ptr;
437	}	425	}
438		426
439	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	427	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		428
		429	/* faster than SvSTATE, but expects a coroutine hv */
		430	#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
		431	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
440		432
441	/* the next two functions merely cache the padlists */	433	/* the next two functions merely cache the padlists */
442	static void	434	static void
443	get_padlist (pTHX_ CV *cv)	435	get_padlist (pTHX_ CV *cv)
444	{	436	{
…		…
511	CvPADLIST (cv) = (AV *)POPs;	503	CvPADLIST (cv) = (AV *)POPs;
512	}	504	}
513		505
514	PUTBACK;	506	PUTBACK;
515	}	507	}
		508
		509	slf_frame = c->slf_frame;
		510	coro_throw = c->throw;
516	}	511	}
517		512
518	static void	513	static void
519	save_perl (pTHX_ Coro__State c)	514	save_perl (pTHX_ Coro__State c)
520	{	515	{
		516	c->throw = coro_throw;
		517	c->slf_frame = slf_frame;
		518
521	{	519	{
522	dSP;	520	dSP;
523	I32 cxix = cxstack_ix;	521	I32 cxix = cxstack_ix;
524	PERL_CONTEXT *ccstk = cxstack;	522	PERL_CONTEXT *ccstk = cxstack;
525	PERL_SI *top_si = PL_curstackinfo;	523	PERL_SI *top_si = PL_curstackinfo;
…		…
592	#undef VAR	590	#undef VAR
593	}	591	}
594	}	592	}
595		593
596	/*	594	/*
597	* allocate various perl stacks. This is an exact copy	595	* allocate various perl stacks. This is almost an exact copy
598	* of perl.c:init_stacks, except that it uses less memory	596	* of perl.c:init_stacks, except that it uses less memory
599	* on the (sometimes correct) assumption that coroutines do	597	* on the (sometimes correct) assumption that coroutines do
600	* not usually need a lot of stackspace.	598	* not usually need a lot of stackspace.
601	*/	599	*/
602	#if CORO_PREFER_PERL_FUNCTIONS	600	#if CORO_PREFER_PERL_FUNCTIONS
…		…
709	#endif	707	#endif
710	}	708	}
711	}	709	}
712		710
713	return rss;	711	return rss;
714	}
715
716	/** set stacklevel support **************************************************/
717
718	/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719	#define SSL_HEAD (void)0
720	/* we somtimes need to create the effect of leaving via pp_set_stacklevel */
721	#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723	INLINE void
724	set_stacklevel_tail (pTHX)
725	{
726	dSP;
727	int gimme = GIMME_V;
728
729	if (gimme == G_SCALAR)
730	XPUSHs (&PL_sv_undef);
731
732	PUTBACK;
733	}	712	}
734		713
735	/** coroutine stack handling ************************************************/	714	/** coroutine stack handling ************************************************/
736		715
737	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);	716	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
…		…
823		802
824	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	803	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
825	}	804	}
826		805
827	static void	806	static void
		807	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		808	{
		809	/* kind of mega-hacky, but works */
		810	ta->next = ta->prev = (struct coro *)ta;
		811	}
		812
		813	static int
		814	slf_check_nop (pTHX_ struct CoroSLF *frame)
		815	{
		816	return 0;
		817	}
		818
		819	static void NOINLINE /* noinline to keep it out of the transfer fast path */
828	coro_setup (pTHX_ struct coro *coro)	820	coro_setup (pTHX_ struct coro *coro)
829	{	821	{
830	/*	822	/*
831	* emulate part of the perl startup here.	823	* emulate part of the perl startup here.
832	*/	824	*/
…		…
871	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	863	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872	SPAGAIN;	864	SPAGAIN;
873	}	865	}
874		866
875	/* this newly created coroutine might be run on an existing cctx which most	867	/* this newly created coroutine might be run on an existing cctx which most
876	* likely was suspended in set_stacklevel, called from pp_set_stacklevel,	868	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877	* so we have to emulate entering pp_set_stacklevel here.
878	*/	869	*/
879	SSL_HEAD;	870	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		871	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		872
		873	coro_throw = coro->throw;
880	}	874	}
881		875
882	static void	876	static void
883	coro_destruct (pTHX_ struct coro *coro)	877	coro_destruct (pTHX_ struct coro *coro)
884	{	878	{
…		…
908		902
909	SvREFCNT_dec (PL_diehook);	903	SvREFCNT_dec (PL_diehook);
910	SvREFCNT_dec (PL_warnhook);	904	SvREFCNT_dec (PL_warnhook);
911		905
912	SvREFCNT_dec (coro->saved_deffh);	906	SvREFCNT_dec (coro->saved_deffh);
913	SvREFCNT_dec (coro->throw);	907	SvREFCNT_dec (coro_throw);
914		908
915	coro_destruct_stacks (aTHX);	909	coro_destruct_stacks (aTHX);
916	}	910	}
917		911
918	INLINE void	912	INLINE void
…		…
928	static int	922	static int
929	runops_trace (pTHX)	923	runops_trace (pTHX)
930	{	924	{
931	COP *oldcop = 0;	925	COP *oldcop = 0;
932	int oldcxix = -2;	926	int oldcxix = -2;
933	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	927	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
934	coro_cctx *cctx = coro->cctx;	928	coro_cctx *cctx = coro->cctx;
935		929
936	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	930	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937	{	931	{
938	PERL_ASYNC_CHECK ();	932	PERL_ASYNC_CHECK ();
…		…
1048	TAINT_NOT;	1042	TAINT_NOT;
1049	return 0;	1043	return 0;
1050	}	1044	}
1051		1045
1052	static void	1046	static void
1053	prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)	1047	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1054	{	1048	{
1055	ta->prev = (struct coro *)cctx;	1049	ta->prev = (struct coro *)cctx;
1056	ta->next = 0;	1050	ta->next = 0;
1057	}	1051	}
1058		1052
…		…
1087		1081
1088	/* the tail of transfer: execute stuff we can only do after a transfer */	1082	/* the tail of transfer: execute stuff we can only do after a transfer */
1089	INLINE void	1083	INLINE void
1090	transfer_tail (pTHX)	1084	transfer_tail (pTHX)
1091	{	1085	{
1092	struct coro *next = (struct coro *)transfer_next;
1093	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
1096	free_coro_mortal (aTHX);	1086	free_coro_mortal (aTHX);
1097	UNLOCK;
1098
1099	if (expect_false (next->throw))
1100	{
1101	SV *exception = sv_2mortal (next->throw);
1102
1103	next->throw = 0;
1104	sv_setsv (ERRSV, exception);
1105	croak (0);
1106	}
1107	}	1087	}
1108		1088
1109	/*	1089	/*
1110	* this is a _very_ stripped down perl interpreter ;)	1090	* this is a _very_ stripped down perl interpreter ;)
1111	*/	1091	*/
…		…
1118	# endif	1098	# endif
1119	#endif	1099	#endif
1120	{	1100	{
1121	dTHX;	1101	dTHX;
1122		1102
1123	/* we are the alternative tail to pp_set_stacklevel */	1103	/* normally we would need to skip the entersub here */
1124	/* so do the same things here */	1104	/* not doing so will re-execute it, which is exactly what we want */
1125	SSL_TAIL;
1126
1127	/* we now skip the op that did lead to transfer() */
1128	PL_op = PL_op->op_next;	1105	/* PL_nop = PL_nop->op_next */
1129		1106
1130	/* inject a fake subroutine call to cctx_init */	1107	/* inject a fake subroutine call to cctx_init */
1131	cctx_prepare (aTHX_ (coro_cctx *)arg);	1108	cctx_prepare (aTHX_ (coro_cctx *)arg);
1132		1109
1133	/* cctx_run is the alternative tail of transfer() */	1110	/* cctx_run is the alternative tail of transfer() */
…		…
1294	/** coroutine switching *****************************************************/	1271	/** coroutine switching *****************************************************/
1295		1272
1296	static void	1273	static void
1297	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1274	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298	{	1275	{
		1276	/* TODO: throwing up here is considered harmful */
		1277
1299	if (expect_true (prev != next))	1278	if (expect_true (prev != next))
1300	{	1279	{
1301	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1280	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1281	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303		1282
1304	if (expect_false (next->flags & CF_RUNNING))	1283	if (expect_false (next->flags & CF_RUNNING))
1305	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1284	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306		1285
1307	if (expect_false (next->flags & CF_DESTROYED))	1286	if (expect_false (next->flags & CF_DESTROYED))
1308	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1287	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309		1288
1310	#if !PERL_VERSION_ATLEAST (5,10,0)	1289	#if !PERL_VERSION_ATLEAST (5,10,0)
1311	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1290	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1291	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313	#endif	1292	#endif
1314	}	1293	}
1315	}	1294	}
1316		1295
1317	/* always use the TRANSFER macro */	1296	/* always use the TRANSFER macro */
1318	static void NOINLINE	1297	static void NOINLINE /* noinline so we have a fixed stackframe */
1319	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1298	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1320	{	1299	{
1321	dSTACKLEVEL;	1300	dSTACKLEVEL;
1322		1301
1323	/* sometimes transfer is only called to set idle_sp */	1302	/* sometimes transfer is only called to set idle_sp */
1324	if (expect_false (!next))	1303	if (expect_false (!next))
1325	{	1304	{
1326	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1305	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1327	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1306	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1328	}	1307	}
1329	else if (expect_true (prev != next))	1308	else if (expect_true (prev != next))
1330	{	1309	{
1331	coro_cctx *prev__cctx;	1310	coro_cctx *prev__cctx;
…		…
1338	prev->flags |= CF_RUNNING;	1317	prev->flags |= CF_RUNNING;
1339	}	1318	}
1340		1319
1341	prev->flags &= ~CF_RUNNING;	1320	prev->flags &= ~CF_RUNNING;
1342	next->flags |= CF_RUNNING;	1321	next->flags |= CF_RUNNING;
1343
1344	LOCK;
1345		1322
1346	/* first get rid of the old state */	1323	/* first get rid of the old state */
1347	save_perl (aTHX_ prev);	1324	save_perl (aTHX_ prev);
1348		1325
1349	if (expect_false (next->flags & CF_NEW))	1326	if (expect_false (next->flags & CF_NEW))
…		…
1358		1335
1359	prev__cctx = prev->cctx;	1336	prev__cctx = prev->cctx;
1360		1337
1361	/* possibly untie and reuse the cctx */	1338	/* possibly untie and reuse the cctx */
1362	if (expect_true (	1339	if (expect_true (
1363	prev__cctx->idle_sp == STACKLEVEL	1340	prev__cctx->idle_sp == (void *)stacklevel
1364	&& !(prev__cctx->flags & CC_TRACE)	1341	&& !(prev__cctx->flags & CC_TRACE)
1365	&& !force_cctx	1342	&& !force_cctx
1366	))	1343	))
1367	{	1344	{
1368	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1345	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1369	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));	1346	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1370		1347
1371	prev->cctx = 0;	1348	prev->cctx = 0;
1372		1349
1373	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1350	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
…		…
1381		1358
1382	++next->usecount;	1359	++next->usecount;
1383		1360
1384	if (expect_true (!next->cctx))	1361	if (expect_true (!next->cctx))
1385	next->cctx = cctx_get (aTHX);	1362	next->cctx = cctx_get (aTHX);
1386
1387	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1388	transfer_next = next;
1389		1363
1390	if (expect_false (prev__cctx != next->cctx))	1364	if (expect_false (prev__cctx != next->cctx))
1391	{	1365	{
1392	prev__cctx->top_env = PL_top_env;	1366	prev__cctx->top_env = PL_top_env;
1393	PL_top_env = next->cctx->top_env;	1367	PL_top_env = next->cctx->top_env;
…		…
1407	coro_state_destroy (pTHX_ struct coro *coro)	1381	coro_state_destroy (pTHX_ struct coro *coro)
1408	{	1382	{
1409	if (coro->flags & CF_DESTROYED)	1383	if (coro->flags & CF_DESTROYED)
1410	return 0;	1384	return 0;
1411		1385
		1386	if (coro->on_destroy)
		1387	coro->on_destroy (aTHX_ coro);
		1388
1412	coro->flags |= CF_DESTROYED;	1389	coro->flags |= CF_DESTROYED;
1413		1390
1414	if (coro->flags & CF_READY)	1391	if (coro->flags & CF_READY)
1415	{	1392	{
1416	/* reduce nready, as destroying a ready coro effectively unreadies it */	1393	/* reduce nready, as destroying a ready coro effectively unreadies it */
1417	/* alternative: look through all ready queues and remove the coro */	1394	/* alternative: look through all ready queues and remove the coro */
1418	LOCK;
1419	--coro_nready;	1395	--coro_nready;
1420	UNLOCK;
1421	}	1396	}
1422	else	1397	else
1423	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1398	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1424		1399
1425	if (coro->mainstack && coro->mainstack != main_mainstack)	1400	if (coro->mainstack && coro->mainstack != main_mainstack)
1426	{	1401	{
1427	struct coro temp;	1402	struct coro temp;
1428		1403
1429	if (coro->flags & CF_RUNNING)	1404	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1430	croak ("FATAL: tried to destroy currently running coroutine");
1431		1405
1432	save_perl (aTHX_ &temp);	1406	save_perl (aTHX_ &temp);
1433	load_perl (aTHX_ coro);	1407	load_perl (aTHX_ coro);
1434		1408
1435	coro_destruct (aTHX_ coro);	1409	coro_destruct (aTHX_ coro);
…		…
1486	# define MGf_DUP 0	1460	# define MGf_DUP 0
1487	#endif	1461	#endif
1488	};	1462	};
1489		1463
1490	static void	1464	static void
1491	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1465	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1492	{	1466	{
1493	ta->prev = SvSTATE (prev_sv);	1467	ta->prev = SvSTATE (prev_sv);
1494	ta->next = SvSTATE (next_sv);	1468	ta->next = SvSTATE (next_sv);
1495	TRANSFER_CHECK (*ta);	1469	TRANSFER_CHECK (*ta);
1496	}	1470	}
1497		1471
1498	static void	1472	static void
1499	api_transfer (SV *prev_sv, SV *next_sv)	1473	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1500	{	1474	{
1501	dTHX;
1502	struct transfer_args ta;	1475	struct coro_transfer_args ta;
1503		1476
1504	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1477	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1505	TRANSFER (ta, 1);	1478	TRANSFER (ta, 1);
1506	}	1479	}
1507		1480
1508	/** Coro ********************************************************************/	1481	/** Coro ********************************************************************/
1509		1482
1510	static void	1483	INLINE void
1511	coro_enq (pTHX_ SV *coro_sv)	1484	coro_enq (pTHX_ struct coro *coro)
1512	{	1485	{
1513	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1486	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1514	}	1487	}
1515		1488
1516	static SV *	1489	INLINE SV *
1517	coro_deq (pTHX)	1490	coro_deq (pTHX)
1518	{	1491	{
1519	int prio;	1492	int prio;
1520		1493
1521	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1494	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1524		1497
1525	return 0;	1498	return 0;
1526	}	1499	}
1527		1500
1528	static int	1501	static int
1529	api_ready (SV *coro_sv)	1502	api_ready (pTHX_ SV *coro_sv)
1530	{	1503	{
1531	dTHX;
1532	struct coro *coro;	1504	struct coro *coro;
1533	SV *sv_hook;	1505	SV *sv_hook;
1534	void (*xs_hook)(void);	1506	void (*xs_hook)(void);
1535		1507
1536	if (SvROK (coro_sv))	1508	if (SvROK (coro_sv))
…		…
1541	if (coro->flags & CF_READY)	1513	if (coro->flags & CF_READY)
1542	return 0;	1514	return 0;
1543		1515
1544	coro->flags |= CF_READY;	1516	coro->flags |= CF_READY;
1545		1517
1546	LOCK;
1547
1548	sv_hook = coro_nready ? 0 : coro_readyhook;	1518	sv_hook = coro_nready ? 0 : coro_readyhook;
1549	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1519	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1550		1520
1551	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1521	coro_enq (aTHX_ coro);
1552	++coro_nready;	1522	++coro_nready;
1553		1523
1554	UNLOCK;
1555
1556	if (sv_hook)	1524	if (sv_hook)
1557	{	1525	{
1558	dSP;	1526	dSP;
1559		1527
1560	ENTER;	1528	ENTER;
…		…
1574		1542
1575	return 1;	1543	return 1;
1576	}	1544	}
1577		1545
1578	static int	1546	static int
1579	api_is_ready (SV *coro_sv)	1547	api_is_ready (pTHX_ SV *coro_sv)
1580	{	1548	{
1581	dTHX;
1582
1583	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1549	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1584	}	1550	}
1585		1551
1586	INLINE void	1552	INLINE void
1587	prepare_schedule (pTHX_ struct transfer_args *ta)	1553	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1588	{	1554	{
1589	SV *prev_sv, *next_sv;	1555	SV *prev_sv, *next_sv;
1590		1556
1591	for (;;)	1557	for (;;)
1592	{	1558	{
1593	LOCK;
1594	next_sv = coro_deq (aTHX);	1559	next_sv = coro_deq (aTHX);
1595		1560
1596	/* nothing to schedule: call the idle handler */	1561	/* nothing to schedule: call the idle handler */
1597	if (expect_false (!next_sv))	1562	if (expect_false (!next_sv))
1598	{	1563	{
1599	dSP;	1564	dSP;
1600	UNLOCK;
1601		1565
1602	ENTER;	1566	ENTER;
1603	SAVETMPS;	1567	SAVETMPS;
1604		1568
1605	PUSHMARK (SP);	1569	PUSHMARK (SP);
…		…
1610	FREETMPS;	1574	FREETMPS;
1611	LEAVE;	1575	LEAVE;
1612	continue;	1576	continue;
1613	}	1577	}
1614		1578
1615	ta->next = SvSTATE (next_sv);	1579	ta->next = SvSTATE_hv (next_sv);
1616		1580
1617	/* cannot transfer to destroyed coros, skip and look for next */	1581	/* cannot transfer to destroyed coros, skip and look for next */
1618	if (expect_false (ta->next->flags & CF_DESTROYED))	1582	if (expect_false (ta->next->flags & CF_DESTROYED))
1619	{	1583	{
1620	UNLOCK;
1621	SvREFCNT_dec (next_sv);	1584	SvREFCNT_dec (next_sv);
1622	/* coro_nready has already been taken care of by destroy */	1585	/* coro_nready has already been taken care of by destroy */
1623	continue;	1586	continue;
1624	}	1587	}
1625		1588
1626	--coro_nready;	1589	--coro_nready;
1627	UNLOCK;
1628	break;	1590	break;
1629	}	1591	}
1630		1592
1631	/* free this only after the transfer */	1593	/* free this only after the transfer */
1632	prev_sv = SvRV (coro_current);	1594	prev_sv = SvRV (coro_current);
1633	ta->prev = SvSTATE (prev_sv);	1595	ta->prev = SvSTATE_hv (prev_sv);
1634	TRANSFER_CHECK (*ta);	1596	TRANSFER_CHECK (*ta);
1635	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));	1597	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1636	ta->next->flags &= ~CF_READY;	1598	ta->next->flags &= ~CF_READY;
1637	SvRV_set (coro_current, next_sv);	1599	SvRV_set (coro_current, next_sv);
1638		1600
1639	LOCK;
1640	free_coro_mortal (aTHX);	1601	free_coro_mortal (aTHX);
1641	coro_mortal = prev_sv;	1602	coro_mortal = prev_sv;
1642	UNLOCK;
1643	}	1603	}
1644		1604
1645	INLINE void	1605	INLINE void
1646	prepare_cede (pTHX_ struct transfer_args *ta)	1606	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1647	{	1607	{
1648	api_ready (coro_current);	1608	api_ready (aTHX_ coro_current);
1649	prepare_schedule (aTHX_ ta);	1609	prepare_schedule (aTHX_ ta);
1650	}	1610	}
1651		1611
		1612	INLINE void
		1613	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1614	{
		1615	SV *prev = SvRV (coro_current);
		1616
		1617	if (coro_nready)
		1618	{
		1619	prepare_schedule (aTHX_ ta);
		1620	api_ready (aTHX_ prev);
		1621	}
		1622	else
		1623	prepare_nop (aTHX_ ta);
		1624	}
		1625
		1626	static void
		1627	api_schedule (pTHX)
		1628	{
		1629	struct coro_transfer_args ta;
		1630
		1631	prepare_schedule (aTHX_ &ta);
		1632	TRANSFER (ta, 1);
		1633	}
		1634
1652	static int	1635	static int
1653	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1636	api_cede (pTHX)
1654	{	1637	{
1655	if (coro_nready)	1638	struct coro_transfer_args ta;
1656	{	1639
1657	SV *prev = SvRV (coro_current);
1658	prepare_schedule (aTHX_ ta);	1640	prepare_cede (aTHX_ &ta);
1659	api_ready (prev);	1641
		1642	if (expect_true (ta.prev != ta.next))
		1643	{
		1644	TRANSFER (ta, 1);
1660	return 1;	1645	return 1;
1661	}	1646	}
1662	else	1647	else
1663	return 0;	1648	return 0;
1664	}	1649	}
1665		1650
1666	static void
1667	api_schedule (void)
1668	{
1669	dTHX;
1670	struct transfer_args ta;
1671
1672	prepare_schedule (aTHX_ &ta);
1673	TRANSFER (ta, 1);
1674	}
1675
1676	static int	1651	static int
1677	api_cede (void)	1652	api_cede_notself (pTHX)
1678	{	1653	{
1679	dTHX;	1654	if (coro_nready)
		1655	{
1680	struct transfer_args ta;	1656	struct coro_transfer_args ta;
1681		1657
1682	prepare_cede (aTHX_ &ta);	1658	prepare_cede_notself (aTHX_ &ta);
1683
1684	if (expect_true (ta.prev != ta.next))
1685	{
1686	TRANSFER (ta, 1);	1659	TRANSFER (ta, 1);
1687	return 1;	1660	return 1;
1688	}	1661	}
1689	else	1662	else
1690	return 0;	1663	return 0;
1691	}	1664	}
1692		1665
1693	static int	1666	static void
1694	api_cede_notself (void)
1695	{
1696	dTHX;
1697	struct transfer_args ta;
1698
1699	if (prepare_cede_notself (aTHX_ &ta))
1700	{
1701	TRANSFER (ta, 1);
1702	return 1;
1703	}
1704	else
1705	return 0;
1706	}
1707
1708	static void
1709	api_trace (SV *coro_sv, int flags)	1667	api_trace (pTHX_ SV *coro_sv, int flags)
1710	{	1668	{
1711	dTHX;
1712	struct coro *coro = SvSTATE (coro_sv);	1669	struct coro *coro = SvSTATE (coro_sv);
1713		1670
1714	if (flags & CC_TRACE)	1671	if (flags & CC_TRACE)
1715	{	1672	{
1716	if (!coro->cctx)	1673	if (!coro->cctx)
1717	coro->cctx = cctx_new_run ();	1674	coro->cctx = cctx_new_run ();
1718	else if (!(coro->cctx->flags & CC_TRACE))	1675	else if (!(coro->cctx->flags & CC_TRACE))
1719	croak ("cannot enable tracing on coroutine with custom stack");	1676	croak ("cannot enable tracing on coroutine with custom stack,");
1720		1677
1721	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1678	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1722	}	1679	}
1723	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1680	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1724	{	1681	{
…		…
1729	else	1686	else
1730	coro->slot->runops = RUNOPS_DEFAULT;	1687	coro->slot->runops = RUNOPS_DEFAULT;
1731	}	1688	}
1732	}	1689	}
1733		1690
1734	#if 0	1691	/*****************************************************************************/
		1692	/* schedule-like-function opcode (SLF) */
		1693
		1694	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1695	static const CV *slf_cv;
		1696	static SV **slf_argv;
		1697	static int slf_argc, slf_arga; /* count, allocated */
		1698	static I32 slf_ax; /* top of stack, for restore */
		1699
		1700	/* this restores the stack in the case we patched the entersub, to */
		1701	/* recreate the stack frame as perl will on following calls */
		1702	/* since entersub cleared the stack */
		1703	static OP *
		1704	pp_restore (pTHX)
		1705	{
		1706	int i;
		1707	SV **SP = PL_stack_base + slf_ax;
		1708
		1709	PUSHMARK (SP);
		1710
		1711	EXTEND (SP, slf_argc + 1);
		1712
		1713	for (i = 0; i < slf_argc; ++i)
		1714	PUSHs (sv_2mortal (slf_argv [i]));
		1715
		1716	PUSHs ((SV *)CvGV (slf_cv));
		1717
		1718	RETURNOP (slf_restore.op_first);
		1719	}
		1720
1735	static int	1721	static void
1736	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	1722	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1737	{	1723	{
1738	AV *padlist;	1724	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1739	AV *av = (AV *)mg->mg_obj;
1740
1741	abort ();
1742
1743	return 0;
1744	}	1725	}
1745		1726
1746	static MGVTBL coro_gensub_vtbl = {	1727	static void
1747	0, 0, 0, 0,	1728	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1748	coro_gensub_free	1729	{
1749	};	1730	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1750	#endif	1731
		1732	frame->prepare = slf_prepare_set_stacklevel;
		1733	frame->check = slf_check_nop;
		1734	frame->data = (void *)SvIV (arg [0]);
		1735	}
		1736
		1737	static void
		1738	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1739	{
		1740	SV **arg = (SV **)slf_frame.data;
		1741
		1742	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1743	}
		1744
		1745	static void
		1746	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1747	{
		1748	if (items != 2)
		1749	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1750
		1751	frame->prepare = slf_prepare_transfer;
		1752	frame->check = slf_check_nop;
		1753	frame->data = (void *)arg; /* let's hope it will stay valid */
		1754	}
		1755
		1756	static void
		1757	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1758	{
		1759	frame->prepare = prepare_schedule;
		1760	frame->check = slf_check_nop;
		1761	}
		1762
		1763	static void
		1764	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1765	{
		1766	frame->prepare = prepare_cede;
		1767	frame->check = slf_check_nop;
		1768	}
		1769
		1770	static void
		1771	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1772	{
		1773	frame->prepare = prepare_cede_notself;
		1774	frame->check = slf_check_nop;
		1775	}
		1776
		1777	/* we hijack an hopefully unused CV flag for our purposes */
		1778	#define CVf_SLF 0x4000
		1779
		1780	/*
		1781	* these not obviously related functions are all rolled into one
		1782	* function to increase chances that they all will call transfer with the same
		1783	* stack offset
		1784	* SLF stands for "schedule-like-function".
		1785	*/
		1786	static OP *
		1787	pp_slf (pTHX)
		1788	{
		1789	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1790
		1791	/* set up the slf frame, unless it has already been set-up */
		1792	/* the latter happens when a new coro has been started */
		1793	/* or when a new cctx was attached to an existing coroutine */
		1794	if (expect_true (!slf_frame.prepare))
		1795	{
		1796	/* first iteration */
		1797	dSP;
		1798	SV **arg = PL_stack_base + TOPMARK + 1;
		1799	int items = SP - arg; /* args without function object */
		1800	SV *gv = *sp;
		1801
		1802	/* do a quick consistency check on the "function" object, and if it isn't */
		1803	/* for us, divert to the real entersub */
		1804	if (SvTYPE (gv) != SVt_PVGV
		1805	|| !GvCV (gv)
		1806	|| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1807	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1808
		1809	if (!(PL_op->op_flags & OPf_STACKED))
		1810	{
		1811	/* ampersand-form of call, use @_ instead of stack */
		1812	AV *av = GvAV (PL_defgv);
		1813	arg = AvARRAY (av);
		1814	items = AvFILLp (av) + 1;
		1815	}
		1816
		1817	/* now call the init function, which needs to set up slf_frame */
		1818	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1819	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1820
		1821	/* pop args */
		1822	SP = PL_stack_base + POPMARK;
		1823
		1824	PUTBACK;
		1825	}
		1826
		1827	/* now that we have a slf_frame, interpret it! */
		1828	/* we use a callback system not to make the code needlessly */
		1829	/* complicated, but so we can run multiple perl coros from one cctx */
		1830
		1831	do
		1832	{
		1833	struct coro_transfer_args ta;
		1834
		1835	slf_frame.prepare (aTHX_ &ta);
		1836	TRANSFER (ta, 0);
		1837
		1838	checkmark = PL_stack_sp - PL_stack_base;
		1839	}
		1840	while (slf_frame.check (aTHX_ &slf_frame));
		1841
		1842	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1843
		1844	/* return value handling - mostly like entersub */
		1845	{
		1846	dSP;
		1847	SV **bot = PL_stack_base + checkmark;
		1848	int gimme = GIMME_V;
		1849
		1850	/* make sure we put something on the stack in scalar context */
		1851	if (gimme == G_SCALAR)
		1852	{
		1853	if (sp == bot)
		1854	XPUSHs (&PL_sv_undef);
		1855
		1856	SP = bot + 1;
		1857	}
		1858
		1859	PUTBACK;
		1860	}
		1861
		1862	/* exception handling */
		1863	if (expect_false (coro_throw))
		1864	{
		1865	SV *exception = sv_2mortal (coro_throw);
		1866
		1867	coro_throw = 0;
		1868	sv_setsv (ERRSV, exception);
		1869	croak (0);
		1870	}
		1871
		1872	return NORMAL;
		1873	}
		1874
		1875	static void
		1876	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1877	{
		1878	int i;
		1879	SV **arg = PL_stack_base + ax;
		1880	int items = PL_stack_sp - arg + 1;
		1881
		1882	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1883
		1884	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1885	&& PL_op->op_ppaddr != pp_slf)
		1886	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1887
		1888	CvFLAGS (cv) |= CVf_SLF;
		1889	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1890	slf_cv = cv;
		1891
		1892	/* we patch the op, and then re-run the whole call */
		1893	/* we have to put the same argument on the stack for this to work */
		1894	/* and this will be done by pp_restore */
		1895	slf_restore.op_next = (OP *)&slf_restore;
		1896	slf_restore.op_type = OP_CUSTOM;
		1897	slf_restore.op_ppaddr = pp_restore;
		1898	slf_restore.op_first = PL_op;
		1899
		1900	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1901
		1902	if (PL_op->op_flags & OPf_STACKED)
		1903	{
		1904	if (items > slf_arga)
		1905	{
		1906	slf_arga = items;
		1907	free (slf_argv);
		1908	slf_argv = malloc (slf_arga * sizeof (SV *));
		1909	}
		1910
		1911	slf_argc = items;
		1912
		1913	for (i = 0; i < items; ++i)
		1914	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1915	}
		1916	else
		1917	slf_argc = 0;
		1918
		1919	PL_op->op_ppaddr = pp_slf;
		1920	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1921
		1922	PL_op = (OP *)&slf_restore;
		1923	}
1751		1924
1752	/*****************************************************************************/	1925	/*****************************************************************************/
1753	/* PerlIO::cede */	1926	/* PerlIO::cede */
1754		1927
1755	typedef struct	1928	typedef struct
…		…
1783	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1956	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1784	double now = nvtime ();	1957	double now = nvtime ();
1785		1958
1786	if (now >= self->next)	1959	if (now >= self->next)
1787	{	1960	{
1788	api_cede ();	1961	api_cede (aTHX);
1789	self->next = now + self->every;	1962	self->next = now + self->every;
1790	}	1963	}
1791		1964
1792	return PerlIOBuf_flush (aTHX_ f);	1965	return PerlIOBuf_flush (aTHX_ f);
1793	}	1966	}
…		…
1823	PerlIOBuf_get_cnt,	1996	PerlIOBuf_get_cnt,
1824	PerlIOBuf_set_ptrcnt,	1997	PerlIOBuf_set_ptrcnt,
1825	};	1998	};
1826		1999
1827	/*****************************************************************************/	2000	/*****************************************************************************/
		2001	/* Coro::Semaphore */
1828		2002
1829	static const CV *ssl_cv; /* for quick consistency check */	2003	static void
		2004	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2005	{
		2006	SV *count_sv = AvARRAY (av)[0];
		2007	IV count = SvIVX (count_sv);
1830		2008
1831	static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */	2009	count += adjust;
1832	static SV *ssl_arg0;	2010	SvIVX (count_sv) = count;
1833	static SV *ssl_arg1;
1834		2011
1835	/* this restores the stack in the case we patched the entersub, to */	2012	/* now wake up as many waiters as are expected to lock */
1836	/* recreate the stack frame as perl will on following calls */	2013	while (count > 0 && AvFILLp (av) > 0)
1837	/* since entersub cleared the stack */	2014	{
		2015	SV *cb;
		2016
		2017	/* swap first two elements so we can shift a waiter */
		2018	AvARRAY (av)[0] = AvARRAY (av)[1];
		2019	AvARRAY (av)[1] = count_sv;
		2020	cb = av_shift (av);
		2021
		2022	if (SvOBJECT (cb))
		2023	api_ready (aTHX_ cb);
		2024	else
		2025	croak ("callbacks not yet supported");
		2026
		2027	SvREFCNT_dec (cb);
		2028
		2029	--count;
		2030	}
		2031	}
		2032
		2033	static void
		2034	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2035	{
		2036	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2037	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2038	}
		2039
		2040	static int
		2041	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2042	{
		2043	AV *av = (AV *)frame->data;
		2044	SV *count_sv = AvARRAY (av)[0];
		2045
		2046	if (SvIVX (count_sv) > 0)
		2047	{
		2048	SvSTATE_current->on_destroy = 0;
		2049	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2050	return 0;
		2051	}
		2052	else
		2053	{
		2054	int i;
		2055	/* if we were woken up but can't down, we look through the whole */
		2056	/* waiters list and only add us if we aren't in there already */
		2057	/* this avoids some degenerate memory usage cases */
		2058
		2059	for (i = 1; i <= AvFILLp (av); ++i)
		2060	if (AvARRAY (av)[i] == SvRV (coro_current))
		2061	return 1;
		2062
		2063	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2064	return 1;
		2065	}
		2066	}
		2067
		2068	static void
		2069	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2070	{
		2071	AV *av = (AV *)SvRV (arg [0]);
		2072
		2073	if (SvIVX (AvARRAY (av)[0]) > 0)
		2074	{
		2075	frame->data = (void *)av;
		2076	frame->prepare = prepare_nop;
		2077	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2078	}
		2079	else
		2080	{
		2081	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2082
		2083	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2084	frame->prepare = prepare_schedule;
		2085
		2086	/* to avoid race conditions when a woken-up coro gets terminated */
		2087	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2088	assert (!SvSTATE_current->on_destroy);//D
		2089	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2090	}
		2091
		2092	frame->check = slf_check_semaphore_down;
		2093
		2094	}
		2095
		2096	/*****************************************************************************/
		2097	/* gensub: simple closure generation utility */
		2098
		2099	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2100
		2101	/* create a closure from XS, returns a code reference */
		2102	/* the arg can be accessed via GENSUB_ARG from the callback */
		2103	/* the callback must use dXSARGS/XSRETURN */
1838	static OP *	2104	static SV *
1839	pp_restore (pTHX)	2105	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1840	{	2106	{
		2107	CV *cv = (CV *)newSV (0);
		2108
		2109	sv_upgrade ((SV *)cv, SVt_PVCV);
		2110
		2111	CvANON_on (cv);
		2112	CvISXSUB_on (cv);
		2113	CvXSUB (cv) = xsub;
		2114	GENSUB_ARG = arg;
		2115
		2116	return newRV_noinc ((SV *)cv);
		2117	}
		2118
		2119	/*****************************************************************************/
		2120	/* Coro::AIO */
		2121
		2122	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2123
		2124	/* helper storage struct */
		2125	struct io_state
		2126	{
		2127	int errorno;
		2128	I32 laststype; /* U16 in 5.10.0 */
		2129	int laststatval;
		2130	Stat_t statcache;
		2131	};
		2132
		2133	static void
		2134	coro_aio_callback (pTHX_ CV *cv)
		2135	{
		2136	dXSARGS;
		2137	AV *state = (AV *)GENSUB_ARG;
		2138	SV *coro = av_pop (state);
		2139	SV *data_sv = newSV (sizeof (struct io_state));
		2140
		2141	av_extend (state, items);
		2142
		2143	sv_upgrade (data_sv, SVt_PV);
		2144	SvCUR_set (data_sv, sizeof (struct io_state));
		2145	SvPOK_only (data_sv);
		2146
		2147	{
		2148	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2149
		2150	data->errorno = errno;
		2151	data->laststype = PL_laststype;
		2152	data->laststatval = PL_laststatval;
		2153	data->statcache = PL_statcache;
		2154	}
		2155
		2156	/* now build the result vector out of all the parameters and the data_sv */
		2157	{
		2158	int i;
		2159
		2160	for (i = 0; i < items; ++i)
		2161	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2162	}
		2163
		2164	av_push (state, data_sv);
		2165
		2166	api_ready (aTHX_ coro);
		2167	SvREFCNT_dec (coro);
		2168	SvREFCNT_dec ((AV *)state);
		2169	}
		2170
		2171	static int
		2172	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2173	{
		2174	AV *state = (AV *)frame->data;
		2175
		2176	/* one element that is an RV? repeat! */
		2177	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2178	return 1;
		2179
		2180	/* restore status */
		2181	{
		2182	SV *data_sv = av_pop (state);
		2183	struct io_state *data = (struct io_state *)SvPVX (data_sv);
		2184
		2185	errno = data->errorno;
		2186	PL_laststype = data->laststype;
		2187	PL_laststatval = data->laststatval;
		2188	PL_statcache = data->statcache;
		2189
		2190	SvREFCNT_dec (data_sv);
		2191	}
		2192
		2193	/* push result values */
		2194	{
1841	dSP;	2195	dSP;
		2196	int i;
1842		2197
		2198	EXTEND (SP, AvFILLp (state) + 1);
		2199	for (i = 0; i <= AvFILLp (state); ++i)
		2200	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2201
		2202	PUTBACK;
		2203	}
		2204
		2205	return 0;
		2206	}
		2207
		2208	static void
		2209	slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2210	{
		2211	AV *state = (AV *)sv_2mortal ((SV *)newAV ());
		2212	SV *coro_hv = SvRV (coro_current);
		2213	struct coro *coro = SvSTATE_hv (coro_hv);
		2214
		2215	/* put our coroutine id on the state arg */
		2216	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2217
		2218	/* first see whether we have a non-zero priority and set it as AIO prio */
		2219	if (coro->prio)
		2220	{
		2221	dSP;
		2222
		2223	static SV *prio_cv;
		2224	static SV *prio_sv;
		2225
		2226	if (expect_false (!prio_cv))
		2227	{
		2228	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2229	prio_sv = newSViv (0);
		2230	}
		2231
		2232	PUSHMARK (SP);
		2233	sv_setiv (prio_sv, coro->prio);
		2234	XPUSHs (prio_sv);
		2235
		2236	PUTBACK;
		2237	call_sv (prio_cv, G_VOID | G_DISCARD);
		2238	}
		2239
		2240	/* now call the original request */
		2241	{
		2242	dSP;
		2243	CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2244	int i;
		2245
1843	PUSHMARK (SP);	2246	PUSHMARK (SP);
1844		2247
1845	EXTEND (SP, 3);	2248	/* first push all args to the stack */
1846	if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;	2249	EXTEND (SP, items + 1);
1847	if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1848	PUSHs ((SV *)CvGV (ssl_cv));
1849		2250
1850	RETURNOP (ssl_restore.op_first);	2251	for (i = 0; i < items; ++i)
1851	}	2252	PUSHs (arg [i]);
1852		2253
1853	/* declare prototype */	2254	/* now push the callback closure */
1854	XS(XS_Coro__State__set_stacklevel);	2255	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
1855		2256
1856	static OP *	2257	/* now call the AIO function - we assume our request is uncancelable */
1857	pp_set_stacklevel (pTHX)
1858	{
1859	dSP;
1860	struct transfer_args ta;
1861	SV **arg = PL_stack_base + TOPMARK + 1;
1862	int items = SP - arg; /* args without function object */
1863
1864	/* do a quick consistency check on the "function" object, and if it isn't */
1865	/* for us, divert to the real entersub */
1866	if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1867	return PL_ppaddr[OP_ENTERSUB](aTHX);
1868
1869	/* pop args */
1870	SP = PL_stack_base + POPMARK;
1871
1872	if (!(PL_op->op_flags & OPf_STACKED))
1873	{
1874	/* ampersand-form of call, use @_ instead of stack */
1875	AV *av = GvAV (PL_defgv);
1876	arg = AvARRAY (av);
1877	items = AvFILLp (av) + 1;
1878	}
1879
1880	PUTBACK;	2258	PUTBACK;
1881	switch (PL_op->op_private & 7)	2259	call_sv ((SV *)req, G_VOID | G_DISCARD);
1882	{
1883	case 0:
1884	prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1885	break;
1886
1887	case 1:
1888	if (items != 2)
1889	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1890
1891	prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1892	break;
1893
1894	case 2:
1895	prepare_schedule (aTHX_ &ta);
1896	break;
1897
1898	case 3:
1899	prepare_cede (aTHX_ &ta);
1900	break;
1901
1902	case 4:
1903	if (!prepare_cede_notself (aTHX_ &ta))
1904	goto skip;
1905
1906	break;
1907	}	2260	}
1908		2261
1909	TRANSFER (ta, 0);	2262	/* now that the requets is going, we loop toll we have a result */
1910	SPAGAIN;	2263	frame->data = (void *)state;
1911		2264	frame->prepare = prepare_schedule;
1912	skip:	2265	frame->check = slf_check_aio_req;
1913	PUTBACK;
1914	SSL_TAIL;
1915	SPAGAIN;
1916	RETURN;
1917	}	2266	}
		2267
		2268	static void
		2269	coro_aio_req_xs (pTHX_ CV *cv)
		2270	{
		2271	dXSARGS;
		2272
		2273	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2274
		2275	XSRETURN_EMPTY;
		2276	}
		2277
		2278	/*****************************************************************************/
1918		2279
1919	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2280	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1920		2281
1921	PROTOTYPES: DISABLE	2282	PROTOTYPES: DISABLE
1922		2283
1923	# these not obviously related functions are all rolled into the same xs
1924	# function to increase chances that they all will call transfer with the same
1925	# stack offset
1926	void
1927	_set_stacklevel (...)
1928	ALIAS:
1929	Coro::State::transfer = 1
1930	Coro::schedule = 2
1931	Coro::cede = 3
1932	Coro::cede_notself = 4
1933	CODE:
1934	{
1935	assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1936
1937	/* we patch the op, and then re-run the whole call */
1938	/* we have to put some dummy argument on the stack for this to work */
1939	/* TODO: walk back the opcode chain (but how?), nuke the pp_gv etc. */
1940	ssl_restore.op_next = (OP *)&ssl_restore;
1941	ssl_restore.op_type = OP_NULL;
1942	ssl_restore.op_ppaddr = pp_restore;
1943	ssl_restore.op_first = PL_op;
1944
1945	ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1946	ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1947
1948	PL_op->op_ppaddr = pp_set_stacklevel;
1949	PL_op->op_private = PL_op->op_private & ~7 | ix; /* we potentially share our private flags with entersub */
1950
1951	PL_op = (OP *)&ssl_restore;
1952	}
1953
1954	BOOT:	2284	BOOT:
1955	{	2285	{
1956	#ifdef USE_ITHREADS	2286	#ifdef USE_ITHREADS
1957	MUTEX_INIT (&coro_lock);
1958	# if CORO_PTHREAD	2287	# if CORO_PTHREAD
1959	coro_thx = PERL_GET_CONTEXT;	2288	coro_thx = PERL_GET_CONTEXT;
1960	# endif	2289	# endif
1961	#endif	2290	#endif
1962	BOOT_PAGESIZE;	2291	BOOT_PAGESIZE;
1963
1964	ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0);
1965		2292
1966	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	2293	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1967	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	2294	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1968		2295
1969	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;	2296	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
…		…
1985	main_top_env = PL_top_env;	2312	main_top_env = PL_top_env;
1986		2313
1987	while (main_top_env->je_prev)	2314	while (main_top_env->je_prev)
1988	main_top_env = main_top_env->je_prev;	2315	main_top_env = main_top_env->je_prev;
1989		2316
		2317	{
		2318	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2319
		2320	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2321	hv_store_ent (PL_custom_op_names, slf,
		2322	newSVpv ("coro_slf", 0), 0);
		2323
		2324	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2325	hv_store_ent (PL_custom_op_descs, slf,
		2326	newSVpv ("coro schedule like function", 0), 0);
		2327	}
		2328
1990	coroapi.ver = CORO_API_VERSION;	2329	coroapi.ver = CORO_API_VERSION;
1991	coroapi.rev = CORO_API_REVISION;	2330	coroapi.rev = CORO_API_REVISION;
		2331
1992	coroapi.transfer = api_transfer;	2332	coroapi.transfer = api_transfer;
		2333
		2334	coroapi.sv_state = SvSTATE_;
		2335	coroapi.execute_slf = api_execute_slf;
		2336	coroapi.prepare_nop = prepare_nop;
		2337	coroapi.prepare_schedule = prepare_schedule;
		2338	coroapi.prepare_cede = prepare_cede;
		2339	coroapi.prepare_cede_notself = prepare_cede_notself;
1993		2340
1994	{	2341	{
1995	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2342	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1996		2343
1997	if (!svp) croak ("Time::HiRes is required");	2344	if (!svp) croak ("Time::HiRes is required");
…		…
2029	for (i = 1; i < items; i++)	2376	for (i = 1; i < items; i++)
2030	av_push (coro->args, newSVsv (ST (i)));	2377	av_push (coro->args, newSVsv (ST (i)));
2031	}	2378	}
2032	OUTPUT:	2379	OUTPUT:
2033	RETVAL	2380	RETVAL
		2381
		2382	void
		2383	_set_stacklevel (...)
		2384	CODE:
		2385	CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
		2386
		2387	void
		2388	transfer (...)
		2389	PROTOTYPE: $$
		2390	CODE:
		2391	CORO_EXECUTE_SLF_XS (slf_init_transfer);
2034		2392
2035	bool	2393	bool
2036	_destroy (SV *coro_sv)	2394	_destroy (SV *coro_sv)
2037	CODE:	2395	CODE:
2038	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2396	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
2045	CODE:	2403	CODE:
2046	_exit (code);	2404	_exit (code);
2047		2405
2048	int	2406	int
2049	cctx_stacksize (int new_stacksize = 0)	2407	cctx_stacksize (int new_stacksize = 0)
		2408	PROTOTYPE: ;$
2050	CODE:	2409	CODE:
2051	RETVAL = cctx_stacksize;	2410	RETVAL = cctx_stacksize;
2052	if (new_stacksize)	2411	if (new_stacksize)
2053	{	2412	{
2054	cctx_stacksize = new_stacksize;	2413	cctx_stacksize = new_stacksize;
…		…
2057	OUTPUT:	2416	OUTPUT:
2058	RETVAL	2417	RETVAL
2059		2418
2060	int	2419	int
2061	cctx_max_idle (int max_idle = 0)	2420	cctx_max_idle (int max_idle = 0)
		2421	PROTOTYPE: ;$
2062	CODE:	2422	CODE:
2063	RETVAL = cctx_max_idle;	2423	RETVAL = cctx_max_idle;
2064	if (max_idle > 1)	2424	if (max_idle > 1)
2065	cctx_max_idle = max_idle;	2425	cctx_max_idle = max_idle;
2066	OUTPUT:	2426	OUTPUT:
2067	RETVAL	2427	RETVAL
2068		2428
2069	int	2429	int
2070	cctx_count ()	2430	cctx_count ()
		2431	PROTOTYPE:
2071	CODE:	2432	CODE:
2072	RETVAL = cctx_count;	2433	RETVAL = cctx_count;
2073	OUTPUT:	2434	OUTPUT:
2074	RETVAL	2435	RETVAL
2075		2436
2076	int	2437	int
2077	cctx_idle ()	2438	cctx_idle ()
		2439	PROTOTYPE:
2078	CODE:	2440	CODE:
2079	RETVAL = cctx_idle;	2441	RETVAL = cctx_idle;
2080	OUTPUT:	2442	OUTPUT:
2081	RETVAL	2443	RETVAL
2082		2444
2083	void	2445	void
2084	list ()	2446	list ()
		2447	PROTOTYPE:
2085	PPCODE:	2448	PPCODE:
2086	{	2449	{
2087	struct coro *coro;	2450	struct coro *coro;
2088	for (coro = coro_first; coro; coro = coro->next)	2451	for (coro = coro_first; coro; coro = coro->next)
2089	if (coro->hv)	2452	if (coro->hv)
…		…
2151		2514
2152	void	2515	void
2153	throw (Coro::State self, SV *throw = &PL_sv_undef)	2516	throw (Coro::State self, SV *throw = &PL_sv_undef)
2154	PROTOTYPE: $;$	2517	PROTOTYPE: $;$
2155	CODE:	2518	CODE:
		2519	{
		2520	struct coro *current = SvSTATE_current;
		2521	SV **throwp = self == current ? &coro_throw : &self->throw;
2156	SvREFCNT_dec (self->throw);	2522	SvREFCNT_dec (*throwp);
2157	self->throw = SvOK (throw) ? newSVsv (throw) : 0;	2523	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2524	}
2158		2525
2159	void	2526	void
2160	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2527	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2528	PROTOTYPE: $;$
		2529	C_ARGS: aTHX_ coro, flags
2161		2530
2162	SV *	2531	SV *
2163	has_cctx (Coro::State coro)	2532	has_cctx (Coro::State coro)
2164	PROTOTYPE: $	2533	PROTOTYPE: $
2165	CODE:	2534	CODE:
…		…
2189	OUTPUT:	2558	OUTPUT:
2190	RETVAL	2559	RETVAL
2191		2560
2192	void	2561	void
2193	force_cctx ()	2562	force_cctx ()
		2563	PROTOTYPE:
2194	CODE:	2564	CODE:
2195	struct coro *coro = SvSTATE (coro_current);
2196	coro->cctx->idle_sp = 0;	2565	SvSTATE_current->cctx->idle_sp = 0;
2197		2566
2198	void	2567	void
2199	swap_defsv (Coro::State self)	2568	swap_defsv (Coro::State self)
2200	PROTOTYPE: $	2569	PROTOTYPE: $
2201	ALIAS:	2570	ALIAS:
2202	swap_defav = 1	2571	swap_defav = 1
2203	CODE:	2572	CODE:
2204	if (!self->slot)	2573	if (!self->slot)
2205	croak ("cannot swap state with coroutine that has no saved state");	2574	croak ("cannot swap state with coroutine that has no saved state,");
2206	else	2575	else
2207	{	2576	{
2208	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2577	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2209	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2578	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2210		2579
2211	SV *tmp = *src; *src = *dst; *dst = tmp;	2580	SV *tmp = *src; *src = *dst; *dst = tmp;
2212	}	2581	}
		2582
2213		2583
2214	MODULE = Coro::State PACKAGE = Coro	2584	MODULE = Coro::State PACKAGE = Coro
2215		2585
2216	BOOT:	2586	BOOT:
2217	{	2587	{
…		…
2242	coroapi.schedule = api_schedule;	2612	coroapi.schedule = api_schedule;
2243	coroapi.cede = api_cede;	2613	coroapi.cede = api_cede;
2244	coroapi.cede_notself = api_cede_notself;	2614	coroapi.cede_notself = api_cede_notself;
2245	coroapi.ready = api_ready;	2615	coroapi.ready = api_ready;
2246	coroapi.is_ready = api_is_ready;	2616	coroapi.is_ready = api_is_ready;
2247	coroapi.nready = &coro_nready;	2617	coroapi.nready = coro_nready;
2248	coroapi.current = coro_current;	2618	coroapi.current = coro_current;
2249		2619
2250	GCoroAPI = &coroapi;	2620	GCoroAPI = &coroapi;
2251	sv_setiv (sv, (IV)&coroapi);	2621	sv_setiv (sv, (IV)&coroapi);
2252	SvREADONLY_on (sv);	2622	SvREADONLY_on (sv);
2253	}	2623	}
2254	}	2624	}
		2625
		2626	void
		2627	schedule (...)
		2628	CODE:
		2629	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2630
		2631	void
		2632	cede (...)
		2633	CODE:
		2634	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2635
		2636	void
		2637	cede_notself (...)
		2638	CODE:
		2639	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2255		2640
2256	void	2641	void
2257	_set_current (SV *current)	2642	_set_current (SV *current)
2258	PROTOTYPE: $	2643	PROTOTYPE: $
2259	CODE:	2644	CODE:
…		…
2262		2647
2263	void	2648	void
2264	_set_readyhook (SV *hook)	2649	_set_readyhook (SV *hook)
2265	PROTOTYPE: $	2650	PROTOTYPE: $
2266	CODE:	2651	CODE:
2267	LOCK;
2268	SvREFCNT_dec (coro_readyhook);	2652	SvREFCNT_dec (coro_readyhook);
2269	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2653	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2270	UNLOCK;
2271		2654
2272	int	2655	int
2273	prio (Coro::State coro, int newprio = 0)	2656	prio (Coro::State coro, int newprio = 0)
		2657	PROTOTYPE: $;$
2274	ALIAS:	2658	ALIAS:
2275	nice = 1	2659	nice = 1
2276	CODE:	2660	CODE:
2277	{	2661	{
2278	RETVAL = coro->prio;	2662	RETVAL = coro->prio;
…		…
2293		2677
2294	SV *	2678	SV *
2295	ready (SV *self)	2679	ready (SV *self)
2296	PROTOTYPE: $	2680	PROTOTYPE: $
2297	CODE:	2681	CODE:
2298	RETVAL = boolSV (api_ready (self));	2682	RETVAL = boolSV (api_ready (aTHX_ self));
2299	OUTPUT:	2683	OUTPUT:
2300	RETVAL	2684	RETVAL
2301		2685
2302	int	2686	int
2303	nready (...)	2687	nready (...)
…		…
2310	# for async_pool speedup	2694	# for async_pool speedup
2311	void	2695	void
2312	_pool_1 (SV *cb)	2696	_pool_1 (SV *cb)
2313	CODE:	2697	CODE:
2314	{	2698	{
2315	struct coro *coro = SvSTATE (coro_current);
2316	HV *hv = (HV *)SvRV (coro_current);	2699	HV *hv = (HV *)SvRV (coro_current);
		2700	struct coro *coro = SvSTATE_hv ((SV *)hv);
2317	AV *defav = GvAV (PL_defgv);	2701	AV *defav = GvAV (PL_defgv);
2318	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2702	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2319	AV *invoke_av;	2703	AV *invoke_av;
2320	int i, len;	2704	int i, len;
2321		2705
…		…
2342	{	2726	{
2343	av_fill (defav, len - 1);	2727	av_fill (defav, len - 1);
2344	for (i = 0; i < len; ++i)	2728	for (i = 0; i < len; ++i)
2345	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2729	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2346	}	2730	}
2347
2348	SvREFCNT_dec (invoke);
2349	}	2731	}
2350		2732
2351	void	2733	void
2352	_pool_2 (SV *cb)	2734	_pool_2 (SV *cb)
2353	CODE:	2735	CODE:
2354	{	2736	{
2355	struct coro *coro = SvSTATE (coro_current);	2737	HV *hv = (HV *)SvRV (coro_current);
		2738	struct coro *coro = SvSTATE_hv ((SV *)hv);
2356		2739
2357	sv_setsv (cb, &PL_sv_undef);	2740	sv_setsv (cb, &PL_sv_undef);
2358		2741
2359	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2742	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2360	coro->saved_deffh = 0;	2743	coro->saved_deffh = 0;
…		…
2367	SvREFCNT_dec (old);	2750	SvREFCNT_dec (old);
2368	croak ("\3async_pool terminate\2\n");	2751	croak ("\3async_pool terminate\2\n");
2369	}	2752	}
2370		2753
2371	av_clear (GvAV (PL_defgv));	2754	av_clear (GvAV (PL_defgv));
2372	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2755	hv_store (hv, "desc", sizeof ("desc") - 1,
2373	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2756	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2374		2757
2375	coro->prio = 0;	2758	coro->prio = 0;
2376		2759
2377	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2760	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2378	api_trace (coro_current, 0);	2761	api_trace (aTHX_ coro_current, 0);
2379		2762
2380	av_push (av_async_pool, newSVsv (coro_current));	2763	av_push (av_async_pool, newSVsv (coro_current));
2381	}	2764	}
2382		2765
2383	#if 0
2384		2766
2385	void	2767	MODULE = Coro::State PACKAGE = PerlIO::cede
2386	_generator_call (...)	2768
2387	PROTOTYPE: @	2769	BOOT:
2388	PPCODE:	2770	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2389	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);	2771
2390	xxxx	2772
2391	abort ();	2773	MODULE = Coro::State PACKAGE = Coro::Semaphore
2392		2774
2393	SV *	2775	SV *
2394	gensub (SV *sub, ...)	2776	new (SV *klass, SV *count_ = 0)
2395	PROTOTYPE: &;@	2777	CODE:
2396	CODE:
2397	{	2778	{
2398	struct coro *coro;	2779	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2399	MAGIC *mg;	2780	AV *av = newAV ();
2400	CV *xcv;	2781	SV **ary;
2401	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2402	int i;
2403		2782
2404	CvGV (ncv) = CvGV (cv);	2783	/* unfortunately, building manually saves memory */
2405	CvFILE (ncv) = CvFILE (cv);	2784	Newx (ary, 2, SV *);
		2785	AvALLOC (av) = ary;
		2786	AvARRAY (av) = ary;
		2787	AvMAX (av) = 1;
		2788	AvFILLp (av) = 0;
		2789	ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2406		2790
2407	Newz (0, coro, 1, struct coro);	2791	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2408	coro->args = newAV ();
2409	coro->flags = CF_NEW;
2410
2411	av_extend (coro->args, items - 1);
2412	for (i = 1; i < items; i++)
2413	av_push (coro->args, newSVsv (ST (i)));
2414
2415	CvISXSUB_on (ncv);
2416	CvXSUBANY (ncv).any_ptr = (void *)coro;
2417
2418	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2419
2420	CvXSUB (ncv) = CvXSUB (xcv);
2421	CvANON_on (ncv);
2422
2423	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2424	RETVAL = newRV_noinc ((SV *)ncv);
2425	}	2792	}
2426	OUTPUT:	2793	OUTPUT:
2427	RETVAL	2794	RETVAL
2428		2795
2429	#endif	2796	SV *
2430		2797	count (SV *self)
2431		2798	CODE:
2432	MODULE = Coro::State PACKAGE = Coro::AIO	2799	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2800	OUTPUT:
		2801	RETVAL
2433		2802
2434	void	2803	void
2435	_get_state (SV *self)	2804	up (SV *self, int adjust = 1)
2436	PPCODE:	2805	ALIAS:
2437	{	2806	adjust = 1
2438	AV *defav = GvAV (PL_defgv);	2807	CODE:
2439	AV *av = newAV ();	2808	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2440	int i;
2441	SV *data_sv = newSV (sizeof (struct io_state));
2442	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2443	SvCUR_set (data_sv, sizeof (struct io_state));
2444	SvPOK_only (data_sv);
2445
2446	data->errorno = errno;
2447	data->laststype = PL_laststype;
2448	data->laststatval = PL_laststatval;
2449	data->statcache = PL_statcache;
2450
2451	av_extend (av, AvFILLp (defav) + 1 + 1);
2452
2453	for (i = 0; i <= AvFILLp (defav); ++i)
2454	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2455
2456	av_push (av, data_sv);
2457
2458	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2459
2460	api_ready (self);
2461	}
2462		2809
2463	void	2810	void
2464	_set_state (SV *state)	2811	down (SV *self)
2465	PROTOTYPE: $	2812	CODE:
2466	PPCODE:	2813	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2814
		2815	void
		2816	try (SV *self)
		2817	PPCODE:
2467	{	2818	{
2468	AV *av = (AV *)SvRV (state);	2819	AV *av = (AV *)SvRV (self);
2469	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);	2820	SV *count_sv = AvARRAY (av)[0];
		2821	IV count = SvIVX (count_sv);
		2822
		2823	if (count > 0)
		2824	{
		2825	--count;
		2826	SvIVX (count_sv) = count;
		2827	XSRETURN_YES;
		2828	}
		2829	else
		2830	XSRETURN_NO;
		2831	}
		2832
		2833	void
		2834	waiters (SV *self)
		2835	CODE:
		2836	{
		2837	AV *av = (AV *)SvRV (self);
		2838
		2839	if (GIMME_V == G_SCALAR)
		2840	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2841	else
		2842	{
2470	int i;	2843	int i;
2471
2472	errno = data->errorno;
2473	PL_laststype = data->laststype;
2474	PL_laststatval = data->laststatval;
2475	PL_statcache = data->statcache;
2476
2477	EXTEND (SP, AvFILLp (av));	2844	EXTEND (SP, AvFILLp (av) + 1 - 1);
2478	for (i = 0; i < AvFILLp (av); ++i)	2845	for (i = 1; i <= AvFILLp (av); ++i)
2479	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	2846	PUSHs (newSVsv (AvARRAY (av)[i]));
		2847	}
2480	}	2848	}
2481		2849
2482		2850
2483	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2851	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2484		2852
2485	BOOT:	2853	BOOT:
2486	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2854	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2487		2855
2488	SV *	2856	void
2489	_schedule (...)	2857	_schedule (...)
2490	PROTOTYPE: @
2491	CODE:	2858	CODE:
2492	{	2859	{
2493	static int incede;	2860	static int incede;
2494		2861
2495	api_cede_notself ();	2862	api_cede_notself (aTHX);
2496		2863
2497	++incede;	2864	++incede;
2498	while (coro_nready >= incede && api_cede ())	2865	while (coro_nready >= incede && api_cede (aTHX))
2499	;	2866	;
2500		2867
2501	sv_setsv (sv_activity, &PL_sv_undef);	2868	sv_setsv (sv_activity, &PL_sv_undef);
2502	if (coro_nready >= incede)	2869	if (coro_nready >= incede)
2503	{	2870	{
…		…
2509		2876
2510	--incede;	2877	--incede;
2511	}	2878	}
2512		2879
2513		2880
2514	MODULE = Coro::State PACKAGE = PerlIO::cede	2881	MODULE = Coro::State PACKAGE = Coro::AIO
2515		2882
2516	BOOT:	2883	void
2517	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2884	_register (char *target, char *proto, SV *req)
		2885	CODE:
		2886	{
		2887	HV *st;
		2888	GV *gvp;
		2889	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		2890	/* newXSproto doesn't return the CV on 5.8 */
		2891	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		2892	sv_setpv ((SV *)slf_cv, proto);
		2893	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		2894	}
2518		2895

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