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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.256 by root, Sat Nov 8 13:32:18 2008 UTC vs.
Revision 1.283 by root, Sun Nov 16 11:12:57 2008 UTC

…		…
46	# define BOOT_PAGESIZE (void)0	46	# define BOOT_PAGESIZE (void)0
47	#endif	47	#endif
48		48
49	#if CORO_USE_VALGRIND	49	#if CORO_USE_VALGRIND
50	# include <valgrind/valgrind.h>	50	# include <valgrind/valgrind.h>
51	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52	#else
53	# define REGISTER_STACK(cctx,start,end)
54	#endif	51	#endif
55		52
56	/* the maximum number of idle cctx that will be pooled */	53	/* the maximum number of idle cctx that will be pooled */
57	static int cctx_max_idle = 4;	54	static int cctx_max_idle = 4;
58		55
…		…
119	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
120	#endif	117	#endif
121		118
122	/* 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
123	* portable way as possible. */	120	* portable way as possible. */
124	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
125	#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
126		126
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		128
129	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
130	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
131	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
133	#else	133	#else
134	# define attribute(x)	134	# define attribute(x)
135	# define BARRIER
136	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
137	#endif	137	#endif
138		138
139	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
140	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
141		141
142	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
143		143
144	#include "CoroAPI.h"	144	#include "CoroAPI.h"
145		145
146	#ifdef USE_ITHREADS	146	#ifdef USE_ITHREADS
147
148	static perl_mutex coro_lock;
149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151	# if CORO_PTHREAD	147	# if CORO_PTHREAD
152	static void *coro_thx;	148	static void *coro_thx;
153	# endif	149	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	150	#endif
161
162	# undef LOCK
163	# define LOCK (void)0
164	# undef UNLOCK
165	# define UNLOCK (void)0
166		151
167	/* helper storage struct for Coro::AIO */	152	/* helper storage struct for Coro::AIO */
168	struct io_state	153	struct io_state
169	{	154	{
170	AV *res;	155	AV *res;
…		…
209	CC_TRACE_LINE = 0x10, /* trace each statement */	194	CC_TRACE_LINE = 0x10, /* trace each statement */
210	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	195	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
211	};	196	};
212		197
213	/* this is a structure representing a c-level coroutine */	198	/* this is a structure representing a c-level coroutine */
214	typedef struct coro_cctx {	199	typedef struct coro_cctx
		200	{
215	struct coro_cctx *next;	201	struct coro_cctx *next;
216		202
217	/* the stack */	203	/* the stack */
218	void *sptr;	204	void *sptr;
219	size_t ssize;	205	size_t ssize;
…		…
237	CF_NEW = 0x0004, /* has never been switched to */	223	CF_NEW = 0x0004, /* has never been switched to */
238	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	224	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
239	};	225	};
240		226
241	/* 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 */
242	typedef struct {	228	typedef struct
		229	{
243	SV *defsv;	230	SV *defsv;
244	AV *defav;	231	AV *defav;
245	SV *errsv;	232	SV *errsv;
246	SV *irsgv;	233	SV *irsgv;
247	#define VAR(name,type) type name;	234	#define VAR(name,type) type name;
…		…
251		238
252	#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))
253		240
254	/* this is a structure representing a perl-level coroutine */	241	/* this is a structure representing a perl-level coroutine */
255	struct coro {	242	struct coro {
256	/* the c coroutine allocated to this perl coroutine, if any */	243	/* the C coroutine allocated to this perl coroutine, if any */
257	coro_cctx *cctx;	244	coro_cctx *cctx;
258		245
259	/* process data */	246	/* process data */
		247	struct CoroSLF slf_frame; /* saved slf frame */
260	AV *mainstack;	248	AV *mainstack;
261	perl_slots *slot; /* basically the saved sp */	249	perl_slots *slot; /* basically the saved sp */
262		250
263	AV *args; /* data associated with this coroutine (initial args) */	251	AV *args; /* data associated with this coroutine (initial args) */
264	int refcnt; /* coroutines are refcounted, yes */	252	int refcnt; /* coroutines are refcounted, yes */
265	int flags; /* CF_ flags */	253	int flags; /* CF_ flags */
266	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);
267		256
268	/* statistics */	257	/* statistics */
269	int usecount; /* number of transfers to this coro */	258	int usecount; /* number of transfers to this coro */
270		259
271	/* coro process data */	260	/* coro process data */
…		…
279	struct coro *next, *prev;	268	struct coro *next, *prev;
280	};	269	};
281		270
282	typedef struct coro *Coro__State;	271	typedef struct coro *Coro__State;
283	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 */
284		275
285	/** Coro ********************************************************************/	276	/** Coro ********************************************************************/
286		277
287	#define PRIO_MAX 3	278	#define PRIO_MAX 3
288	#define PRIO_HIGH 1	279	#define PRIO_HIGH 1
…		…
292	#define PRIO_MIN -4	283	#define PRIO_MIN -4
293		284
294	/* for Coro.pm */	285	/* for Coro.pm */
295	static SV *coro_current;	286	static SV *coro_current;
296	static SV *coro_readyhook;	287	static SV *coro_readyhook;
297	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	288	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
298	static int coro_nready;
299	static struct coro *coro_first;	289	static struct coro *coro_first;
		290	#define coro_nready coroapi.nready
300		291
301	/** lowlevel stuff **********************************************************/	292	/** lowlevel stuff **********************************************************/
302		293
303	static SV *	294	static SV *
304	coro_get_sv (pTHX_ const char *name, int create)	295	coro_get_sv (pTHX_ const char *name, int create)
…		…
397	static MGVTBL coro_cv_vtbl = {	388	static MGVTBL coro_cv_vtbl = {
398	0, 0, 0, 0,	389	0, 0, 0, 0,
399	coro_cv_free	390	coro_cv_free
400	};	391	};
401		392
402	#define CORO_MAGIC(sv, type) \	393	#define CORO_MAGIC(sv, type) \
403	SvMAGIC (sv) \	394	expect_true (SvMAGIC (sv)) \
404	? SvMAGIC (sv)->mg_type == type \	395	? expect_true (SvMAGIC (sv)->mg_type == type) \
405	? SvMAGIC (sv) \	396	? SvMAGIC (sv) \
406	: mg_find (sv, type) \	397	: mg_find (sv, type) \
407	: 0	398	: 0
408		399
409	#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)
410	#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)
411		402
412	static struct coro *	403	INLINE struct coro *
413	SvSTATE_ (pTHX_ SV *coro)	404	SvSTATE_ (pTHX_ SV *coro)
414	{	405	{
415	HV *stash;	406	HV *stash;
416	MAGIC *mg;	407	MAGIC *mg;
417		408
…		…
432	mg = CORO_MAGIC_state (coro);	423	mg = CORO_MAGIC_state (coro);
433	return (struct coro *)mg->mg_ptr;	424	return (struct coro *)mg->mg_ptr;
434	}	425	}
435		426
436	#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))
437		441
438	/* the next two functions merely cache the padlists */	442	/* the next two functions merely cache the padlists */
439	static void	443	static void
440	get_padlist (pTHX_ CV *cv)	444	get_padlist (pTHX_ CV *cv)
441	{	445	{
…		…
508	CvPADLIST (cv) = (AV *)POPs;	512	CvPADLIST (cv) = (AV *)POPs;
509	}	513	}
510		514
511	PUTBACK;	515	PUTBACK;
512	}	516	}
		517
		518	slf_frame = c->slf_frame;
513	}	519	}
514		520
515	static void	521	static void
516	save_perl (pTHX_ Coro__State c)	522	save_perl (pTHX_ Coro__State c)
517	{	523	{
		524	c->slf_frame = slf_frame;
		525
518	{	526	{
519	dSP;	527	dSP;
520	I32 cxix = cxstack_ix;	528	I32 cxix = cxstack_ix;
521	PERL_CONTEXT *ccstk = cxstack;	529	PERL_CONTEXT *ccstk = cxstack;
522	PERL_SI *top_si = PL_curstackinfo;	530	PERL_SI *top_si = PL_curstackinfo;
…		…
589	#undef VAR	597	#undef VAR
590	}	598	}
591	}	599	}
592		600
593	/*	601	/*
594	* allocate various perl stacks. This is an exact copy	602	* allocate various perl stacks. This is almost an exact copy
595	* of perl.c:init_stacks, except that it uses less memory	603	* of perl.c:init_stacks, except that it uses less memory
596	* on the (sometimes correct) assumption that coroutines do	604	* on the (sometimes correct) assumption that coroutines do
597	* not usually need a lot of stackspace.	605	* not usually need a lot of stackspace.
598	*/	606	*/
599	#if CORO_PREFER_PERL_FUNCTIONS	607	#if CORO_PREFER_PERL_FUNCTIONS
…		…
801		809
802	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	810	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
803	}	811	}
804		812
805	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
806	coro_setup (pTHX_ struct coro *coro)	827	coro_setup (pTHX_ struct coro *coro)
807	{	828	{
808	/*	829	/*
809	* emulate part of the perl startup here.	830	* emulate part of the perl startup here.
810	*/	831	*/
…		…
834	PL_rs = newSVsv (GvSV (irsgv));	855	PL_rs = newSVsv (GvSV (irsgv));
835	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	856	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
836		857
837	{	858	{
838	dSP;	859	dSP;
839	LOGOP myop;	860	UNOP myop;
840		861
841	Zero (&myop, 1, LOGOP);	862	Zero (&myop, 1, UNOP);
842	myop.op_next = Nullop;	863	myop.op_next = Nullop;
843	myop.op_flags = OPf_WANT_VOID;	864	myop.op_flags = OPf_WANT_VOID;
844		865
845	PUSHMARK (SP);	866	PUSHMARK (SP);
846	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	867	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
849	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	870	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
850	SPAGAIN;	871	SPAGAIN;
851	}	872	}
852		873
853	/* 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
854	* 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.
855	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
856	* so we ENTER here for symmetry
857	*/	876	*/
858	ENTER;	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 */
859	}	879	}
860		880
861	static void	881	static void
862	coro_destruct (pTHX_ struct coro *coro)	882	coro_destruct (pTHX_ struct coro *coro)
863	{	883	{
…		…
892	SvREFCNT_dec (coro->throw);	912	SvREFCNT_dec (coro->throw);
893		913
894	coro_destruct_stacks (aTHX);	914	coro_destruct_stacks (aTHX);
895	}	915	}
896		916
897	static void	917	INLINE void
898	free_coro_mortal (pTHX)	918	free_coro_mortal (pTHX)
899	{	919	{
900	if (expect_true (coro_mortal))	920	if (expect_true (coro_mortal))
901	{	921	{
902	SvREFCNT_dec (coro_mortal);	922	SvREFCNT_dec (coro_mortal);
…		…
907	static int	927	static int
908	runops_trace (pTHX)	928	runops_trace (pTHX)
909	{	929	{
910	COP *oldcop = 0;	930	COP *oldcop = 0;
911	int oldcxix = -2;	931	int oldcxix = -2;
912	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 */
913	coro_cctx *cctx = coro->cctx;	933	coro_cctx *cctx = coro->cctx;
914		934
915	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	935	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
916	{	936	{
917	PERL_ASYNC_CHECK ();	937	PERL_ASYNC_CHECK ();
…		…
1026		1046
1027	TAINT_NOT;	1047	TAINT_NOT;
1028	return 0;	1048	return 0;
1029	}	1049	}
1030		1050
		1051	static void
		1052	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
		1053	{
		1054	ta->prev = (struct coro *)cctx;
		1055	ta->next = 0;
		1056	}
		1057
1031	/* inject a fake call to Coro::State::_cctx_init into the execution */	1058	/* inject a fake call to Coro::State::_cctx_init into the execution */
1032	/* _cctx_init should be careful, as it could be called at almost any time */	1059	/* _cctx_init should be careful, as it could be called at almost any time */
1033	/* during execution of a perl program */	1060	/* during execution of a perl program */
		1061	/* also initialises PL_top_env */
1034	static void NOINLINE	1062	static void NOINLINE
1035	cctx_prepare (pTHX_ coro_cctx *cctx)	1063	cctx_prepare (pTHX_ coro_cctx *cctx)
1036	{	1064	{
1037	dSP;	1065	dSP;
1038	LOGOP myop;	1066	UNOP myop;
1039		1067
1040	PL_top_env = &PL_start_env;	1068	PL_top_env = &PL_start_env;
1041		1069
1042	if (cctx->flags & CC_TRACE)	1070	if (cctx->flags & CC_TRACE)
1043	PL_runops = runops_trace;	1071	PL_runops = runops_trace;
1044		1072
1045	Zero (&myop, 1, LOGOP);	1073	Zero (&myop, 1, UNOP);
1046	myop.op_next = PL_op;	1074	myop.op_next = PL_op;
1047	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1075	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1048		1076
1049	PUSHMARK (SP);	1077	PUSHMARK (SP);
1050	EXTEND (SP, 2);	1078	EXTEND (SP, 2);
1051	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1079	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1052	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1080	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1053	PUTBACK;	1081	PUTBACK;
1054	PL_op = (OP *)&myop;	1082	PL_op = (OP *)&myop;
1055	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1083	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1056	SPAGAIN;	1084	SPAGAIN;
1057	}	1085	}
1058		1086
		1087	/* the tail of transfer: execute stuff we can only do after a transfer */
		1088	INLINE void
		1089	transfer_tail (pTHX)
		1090	{
		1091	free_coro_mortal (aTHX);
		1092	}
		1093
1059	/*	1094	/*
1060	* this is a _very_ stripped down perl interpreter ;)	1095	* this is a _very_ stripped down perl interpreter ;)
1061	*/	1096	*/
1062	static void	1097	static void
1063	cctx_run (void *arg)	1098	cctx_run (void *arg)
…		…
1068	# endif	1103	# endif
1069	#endif	1104	#endif
1070	{	1105	{
1071	dTHX;	1106	dTHX;
1072		1107
1073	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1108	/* normally we would need to skip the entersub here */
1074	UNLOCK;	1109	/* not doing so will re-execute it, which is exactly what we want */
1075
1076	/* we now skip the entersub that lead to transfer() */
1077	PL_op = PL_op->op_next;	1110	/* PL_nop = PL_nop->op_next */
1078		1111
1079	/* inject a fake subroutine call to cctx_init */	1112	/* inject a fake subroutine call to cctx_init */
1080	cctx_prepare (aTHX_ (coro_cctx *)arg);	1113	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1114
		1115	/* cctx_run is the alternative tail of transfer() */
		1116	transfer_tail (aTHX);
1081		1117
1082	/* somebody or something will hit me for both perl_run and PL_restartop */	1118	/* somebody or something will hit me for both perl_run and PL_restartop */
1083	PL_restartop = PL_op;	1119	PL_restartop = PL_op;
1084	perl_run (PL_curinterp);	1120	perl_run (PL_curinterp);
1085		1121
…		…
1097		1133
1098	static coro_cctx *	1134	static coro_cctx *
1099	cctx_new ()	1135	cctx_new ()
1100	{	1136	{
1101	coro_cctx *cctx;	1137	coro_cctx *cctx;
		1138
		1139	++cctx_count;
		1140	New (0, cctx, 1, coro_cctx);
		1141
		1142	cctx->gen = cctx_gen;
		1143	cctx->flags = 0;
		1144	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1145
		1146	return cctx;
		1147	}
		1148
		1149	/* create a new cctx only suitable as source */
		1150	static coro_cctx *
		1151	cctx_new_empty ()
		1152	{
		1153	coro_cctx *cctx = cctx_new ();
		1154
		1155	cctx->sptr = 0;
		1156	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1157
		1158	return cctx;
		1159	}
		1160
		1161	/* create a new cctx suitable as destination/running a perl interpreter */
		1162	static coro_cctx *
		1163	cctx_new_run ()
		1164	{
		1165	coro_cctx *cctx = cctx_new ();
1102	void *stack_start;	1166	void *stack_start;
1103	size_t stack_size;	1167	size_t stack_size;
1104
1105	++cctx_count;
1106	Newz (0, cctx, 1, coro_cctx);
1107
1108	cctx->gen = cctx_gen;
1109		1168
1110	#if HAVE_MMAP	1169	#if HAVE_MMAP
1111	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1170	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1112	/* mmap supposedly does allocate-on-write for us */	1171	/* mmap supposedly does allocate-on-write for us */
1113	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1172	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1114		1173
1115	if (cctx->sptr != (void *)-1)	1174	if (cctx->sptr != (void *)-1)
1116	{	1175	{
1117	# if CORO_STACKGUARD	1176	#if CORO_STACKGUARD
1118	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1177	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1119	# endif	1178	#endif
1120	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1179	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1121	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1180	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1122	cctx->flags |= CC_MAPPED;	1181	cctx->flags |= CC_MAPPED;
1123	}	1182	}
1124	else	1183	else
1125	#endif	1184	#endif
1126	{	1185	{
1127	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1186	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1128	New (0, cctx->sptr, cctx_stacksize, long);	1187	New (0, cctx->sptr, cctx_stacksize, long);
1129		1188
1130	if (!cctx->sptr)	1189	if (!cctx->sptr)
1131	{	1190	{
1132	perror ("FATAL: unable to allocate stack for coroutine");	1191	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1133	_exit (EXIT_FAILURE);	1192	_exit (EXIT_FAILURE);
1134	}	1193	}
1135		1194
1136	stack_start = cctx->sptr;	1195	stack_start = cctx->sptr;
1137	stack_size = cctx->ssize;	1196	stack_size = cctx->ssize;
1138	}	1197	}
1139		1198
1140	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1199	#if CORO_USE_VALGRIND
		1200	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
		1201	#endif
		1202
1141	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1203	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1142		1204
1143	return cctx;	1205	return cctx;
1144	}	1206	}
1145		1207
…		…
1153	coro_destroy (&cctx->cctx);	1215	coro_destroy (&cctx->cctx);
1154		1216
1155	/* coro_transfer creates new, empty cctx's */	1217	/* coro_transfer creates new, empty cctx's */
1156	if (cctx->sptr)	1218	if (cctx->sptr)
1157	{	1219	{
1158	#if CORO_USE_VALGRIND	1220	#if CORO_USE_VALGRIND
1159	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1221	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1160	#endif	1222	#endif
1161		1223
1162	#if HAVE_MMAP	1224	#if HAVE_MMAP
1163	if (cctx->flags & CC_MAPPED)	1225	if (cctx->flags & CC_MAPPED)
1164	munmap (cctx->sptr, cctx->ssize);	1226	munmap (cctx->sptr, cctx->ssize);
1165	else	1227	else
…		…
1186	return cctx;	1248	return cctx;
1187		1249
1188	cctx_destroy (cctx);	1250	cctx_destroy (cctx);
1189	}	1251	}
1190		1252
1191	return cctx_new ();	1253	return cctx_new_run ();
1192	}	1254	}
1193		1255
1194	static void	1256	static void
1195	cctx_put (coro_cctx *cctx)	1257	cctx_put (coro_cctx *cctx)
1196	{	1258	{
1197	assert (("cctx_put called on non-initialised cctx", cctx->sptr));	1259	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1198		1260
1199	/* free another cctx if overlimit */	1261	/* free another cctx if overlimit */
1200	if (expect_false (cctx_idle >= cctx_max_idle))	1262	if (expect_false (cctx_idle >= cctx_max_idle))
1201	{	1263	{
1202	coro_cctx *first = cctx_first;	1264	coro_cctx *first = cctx_first;
…		…
1217	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1279	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1218	{	1280	{
1219	if (expect_true (prev != next))	1281	if (expect_true (prev != next))
1220	{	1282	{
1221	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1283	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1222	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,");
1223		1285
1224	if (expect_false (next->flags & CF_RUNNING))	1286	if (expect_false (next->flags & CF_RUNNING))
1225	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,");
1226		1288
1227	if (expect_false (next->flags & CF_DESTROYED))	1289	if (expect_false (next->flags & CF_DESTROYED))
1228	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,");
1229		1291
1230	#if !PERL_VERSION_ATLEAST (5,10,0)	1292	#if !PERL_VERSION_ATLEAST (5,10,0)
1231	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1293	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1232	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,");
1233	#endif	1295	#endif
1234	}	1296	}
1235	}	1297	}
1236		1298
1237	/* always use the TRANSFER macro */	1299	/* always use the TRANSFER macro */
…		…
1241	dSTACKLEVEL;	1303	dSTACKLEVEL;
1242		1304
1243	/* sometimes transfer is only called to set idle_sp */	1305	/* sometimes transfer is only called to set idle_sp */
1244	if (expect_false (!next))	1306	if (expect_false (!next))
1245	{	1307	{
1246	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1308	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1247	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 */
1248	}	1310	}
1249	else if (expect_true (prev != next))	1311	else if (expect_true (prev != next))
1250	{	1312	{
1251	static volatile int has_throw;
1252	coro_cctx *prev__cctx;	1313	coro_cctx *prev__cctx;
1253		1314
1254	if (expect_false (prev->flags & CF_NEW))	1315	if (expect_false (prev->flags & CF_NEW))
1255	{	1316	{
1256	/* create a new empty/source context */	1317	/* create a new empty/source context */
1257	++cctx_count;	1318	prev->cctx = cctx_new_empty ();
1258	New (0, prev->cctx, 1, coro_cctx);
1259	prev->cctx->sptr = 0;
1260	coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1261
1262	prev->flags &= ~CF_NEW;	1319	prev->flags &= ~CF_NEW;
1263	prev->flags |= CF_RUNNING;	1320	prev->flags |= CF_RUNNING;
1264	}	1321	}
1265		1322
1266	prev->flags &= ~CF_RUNNING;	1323	prev->flags &= ~CF_RUNNING;
1267	next->flags |= CF_RUNNING;	1324	next->flags |= CF_RUNNING;
1268
1269	LOCK;
1270		1325
1271	/* first get rid of the old state */	1326	/* first get rid of the old state */
1272	save_perl (aTHX_ prev);	1327	save_perl (aTHX_ prev);
1273		1328
1274	if (expect_false (next->flags & CF_NEW))	1329	if (expect_false (next->flags & CF_NEW))
…		…
1281	else	1336	else
1282	load_perl (aTHX_ next);	1337	load_perl (aTHX_ next);
1283		1338
1284	prev__cctx = prev->cctx;	1339	prev__cctx = prev->cctx;
1285		1340
1286	/* possibly "free" the cctx */	1341	/* possibly untie and reuse the cctx */
1287	if (expect_true (	1342	if (expect_true (
1288	prev__cctx->idle_sp == STACKLEVEL	1343	prev__cctx->idle_sp == (void *)stacklevel
1289	&& !(prev__cctx->flags & CC_TRACE)	1344	&& !(prev__cctx->flags & CC_TRACE)
1290	&& !force_cctx	1345	&& !force_cctx
1291	))	1346	))
1292	{	1347	{
1293	/* 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 */
1294	assert (("ERROR: current top_env must equal previous top_env", 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));
1295		1350
1296	prev->cctx = 0;	1351	prev->cctx = 0;
1297		1352
1298	/* 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 */
1299	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1354	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1306		1361
1307	++next->usecount;	1362	++next->usecount;
1308		1363
1309	if (expect_true (!next->cctx))	1364	if (expect_true (!next->cctx))
1310	next->cctx = cctx_get (aTHX);	1365	next->cctx = cctx_get (aTHX);
1311
1312	has_throw = !!next->throw;
1313		1366
1314	if (expect_false (prev__cctx != next->cctx))	1367	if (expect_false (prev__cctx != next->cctx))
1315	{	1368	{
1316	prev__cctx->top_env = PL_top_env;	1369	prev__cctx->top_env = PL_top_env;
1317	PL_top_env = next->cctx->top_env;	1370	PL_top_env = next->cctx->top_env;
1318	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1371	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1319	}	1372	}
1320		1373
1321	free_coro_mortal (aTHX);	1374	transfer_tail (aTHX);
1322	UNLOCK;
1323
1324	if (expect_false (has_throw))
1325	{
1326	struct coro *coro = SvSTATE (coro_current);
1327
1328	if (coro->throw)
1329	{
1330	SV *exception = coro->throw;
1331	coro->throw = 0;
1332	sv_setsv (ERRSV, exception);
1333	croak (0);
1334	}
1335	}
1336	}	1375	}
1337	}	1376	}
1338
1339	struct transfer_args
1340	{
1341	struct coro *prev, *next;
1342	};
1343		1377
1344	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1378	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1345	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1379	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1346		1380
1347	/** high level stuff ********************************************************/	1381	/** high level stuff ********************************************************/
…		…
1349	static int	1383	static int
1350	coro_state_destroy (pTHX_ struct coro *coro)	1384	coro_state_destroy (pTHX_ struct coro *coro)
1351	{	1385	{
1352	if (coro->flags & CF_DESTROYED)	1386	if (coro->flags & CF_DESTROYED)
1353	return 0;	1387	return 0;
		1388
		1389	if (coro->on_destroy)
		1390	coro->on_destroy (aTHX_ coro);
1354		1391
1355	coro->flags |= CF_DESTROYED;	1392	coro->flags |= CF_DESTROYED;
1356		1393
1357	if (coro->flags & CF_READY)	1394	if (coro->flags & CF_READY)
1358	{	1395	{
1359	/* reduce nready, as destroying a ready coro effectively unreadies it */	1396	/* reduce nready, as destroying a ready coro effectively unreadies it */
1360	/* alternative: look through all ready queues and remove the coro */	1397	/* alternative: look through all ready queues and remove the coro */
1361	LOCK;
1362	--coro_nready;	1398	--coro_nready;
1363	UNLOCK;
1364	}	1399	}
1365	else	1400	else
1366	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 */
1367		1402
1368	if (coro->mainstack && coro->mainstack != main_mainstack)	1403	if (coro->mainstack && coro->mainstack != main_mainstack)
1369	{	1404	{
1370	struct coro temp;	1405	struct coro temp;
1371		1406
1372	if (coro->flags & CF_RUNNING)	1407	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1373	croak ("FATAL: tried to destroy currently running coroutine");
1374		1408
1375	save_perl (aTHX_ &temp);	1409	save_perl (aTHX_ &temp);
1376	load_perl (aTHX_ coro);	1410	load_perl (aTHX_ coro);
1377		1411
1378	coro_destruct (aTHX_ coro);	1412	coro_destruct (aTHX_ coro);
…		…
1429	# define MGf_DUP 0	1463	# define MGf_DUP 0
1430	#endif	1464	#endif
1431	};	1465	};
1432		1466
1433	static void	1467	static void
1434	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)
1435	{	1469	{
1436	ta->prev = SvSTATE (prev_sv);	1470	ta->prev = SvSTATE (prev_sv);
1437	ta->next = SvSTATE (next_sv);	1471	ta->next = SvSTATE (next_sv);
1438	TRANSFER_CHECK (*ta);	1472	TRANSFER_CHECK (*ta);
1439	}	1473	}
1440		1474
1441	static void	1475	static void
1442	api_transfer (SV *prev_sv, SV *next_sv)	1476	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1443	{	1477	{
1444	dTHX;
1445	struct transfer_args ta;	1478	struct coro_transfer_args ta;
1446		1479
1447	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1480	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1448	TRANSFER (ta, 1);	1481	TRANSFER (ta, 1);
1449	}	1482	}
1450		1483
1451	/** Coro ********************************************************************/	1484	/** Coro ********************************************************************/
1452		1485
1453	static void	1486	INLINE void
1454	coro_enq (pTHX_ SV *coro_sv)	1487	coro_enq (pTHX_ struct coro *coro)
1455	{	1488	{
1456	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));
1457	}	1490	}
1458		1491
1459	static SV *	1492	INLINE SV *
1460	coro_deq (pTHX)	1493	coro_deq (pTHX)
1461	{	1494	{
1462	int prio;	1495	int prio;
1463		1496
1464	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1497	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1467		1500
1468	return 0;	1501	return 0;
1469	}	1502	}
1470		1503
1471	static int	1504	static int
1472	api_ready (SV *coro_sv)	1505	api_ready (pTHX_ SV *coro_sv)
1473	{	1506	{
1474	dTHX;
1475	struct coro *coro;	1507	struct coro *coro;
1476	SV *sv_hook;	1508	SV *sv_hook;
1477	void (*xs_hook)(void);	1509	void (*xs_hook)(void);
1478		1510
1479	if (SvROK (coro_sv))	1511	if (SvROK (coro_sv))
…		…
1484	if (coro->flags & CF_READY)	1516	if (coro->flags & CF_READY)
1485	return 0;	1517	return 0;
1486		1518
1487	coro->flags |= CF_READY;	1519	coro->flags |= CF_READY;
1488		1520
1489	LOCK;
1490
1491	sv_hook = coro_nready ? 0 : coro_readyhook;	1521	sv_hook = coro_nready ? 0 : coro_readyhook;
1492	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1522	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1493		1523
1494	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1524	coro_enq (aTHX_ coro);
1495	++coro_nready;	1525	++coro_nready;
1496		1526
1497	UNLOCK;
1498
1499	if (sv_hook)	1527	if (sv_hook)
1500	{	1528	{
1501	dSP;	1529	dSP;
1502		1530
1503	ENTER;	1531	ENTER;
…		…
1517		1545
1518	return 1;	1546	return 1;
1519	}	1547	}
1520		1548
1521	static int	1549	static int
1522	api_is_ready (SV *coro_sv)	1550	api_is_ready (pTHX_ SV *coro_sv)
1523	{	1551	{
1524	dTHX;
1525	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1552	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1526	}	1553	}
1527		1554
1528	static void	1555	INLINE void
1529	prepare_schedule (pTHX_ struct transfer_args *ta)	1556	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1530	{	1557	{
1531	SV *prev_sv, *next_sv;	1558	SV *prev_sv, *next_sv;
1532		1559
1533	for (;;)	1560	for (;;)
1534	{	1561	{
1535	LOCK;
1536	next_sv = coro_deq (aTHX);	1562	next_sv = coro_deq (aTHX);
1537		1563
1538	/* nothing to schedule: call the idle handler */	1564	/* nothing to schedule: call the idle handler */
1539	if (expect_false (!next_sv))	1565	if (expect_false (!next_sv))
1540	{	1566	{
1541	dSP;	1567	dSP;
1542	UNLOCK;
1543		1568
1544	ENTER;	1569	ENTER;
1545	SAVETMPS;	1570	SAVETMPS;
1546		1571
1547	PUSHMARK (SP);	1572	PUSHMARK (SP);
…		…
1552	FREETMPS;	1577	FREETMPS;
1553	LEAVE;	1578	LEAVE;
1554	continue;	1579	continue;
1555	}	1580	}
1556		1581
1557	ta->next = SvSTATE (next_sv);	1582	ta->next = SvSTATE_hv (next_sv);
1558		1583
1559	/* cannot transfer to destroyed coros, skip and look for next */	1584	/* cannot transfer to destroyed coros, skip and look for next */
1560	if (expect_false (ta->next->flags & CF_DESTROYED))	1585	if (expect_false (ta->next->flags & CF_DESTROYED))
1561	{	1586	{
1562	UNLOCK;
1563	SvREFCNT_dec (next_sv);	1587	SvREFCNT_dec (next_sv);
1564	/* coro_nready is already taken care of by destroy */	1588	/* coro_nready has already been taken care of by destroy */
1565	continue;	1589	continue;
1566	}	1590	}
1567		1591
1568	--coro_nready;	1592	--coro_nready;
1569	UNLOCK;
1570	break;	1593	break;
1571	}	1594	}
1572		1595
1573	/* free this only after the transfer */	1596	/* free this only after the transfer */
1574	prev_sv = SvRV (coro_current);	1597	prev_sv = SvRV (coro_current);
1575	ta->prev = SvSTATE (prev_sv);	1598	ta->prev = SvSTATE_hv (prev_sv);
1576	TRANSFER_CHECK (*ta);	1599	TRANSFER_CHECK (*ta);
1577	assert (ta->next->flags & CF_READY);	1600	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1578	ta->next->flags &= ~CF_READY;	1601	ta->next->flags &= ~CF_READY;
1579	SvRV_set (coro_current, next_sv);	1602	SvRV_set (coro_current, next_sv);
1580		1603
1581	LOCK;
1582	free_coro_mortal (aTHX);	1604	free_coro_mortal (aTHX);
1583	coro_mortal = prev_sv;	1605	coro_mortal = prev_sv;
1584	UNLOCK;
1585	}	1606	}
1586		1607
1587	static void	1608	INLINE void
1588	prepare_cede (pTHX_ struct transfer_args *ta)	1609	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1589	{	1610	{
1590	api_ready (coro_current);	1611	api_ready (aTHX_ coro_current);
1591	prepare_schedule (aTHX_ ta);	1612	prepare_schedule (aTHX_ ta);
1592	}	1613	}
1593		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
1594	static int	1638	static int
1595	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1639	api_cede (pTHX)
1596	{	1640	{
1597	if (coro_nready)	1641	struct coro_transfer_args ta;
1598	{	1642
1599	SV *prev = SvRV (coro_current);
1600	prepare_schedule (aTHX_ ta);	1643	prepare_cede (aTHX_ &ta);
1601	api_ready (prev);	1644
		1645	if (expect_true (ta.prev != ta.next))
		1646	{
		1647	TRANSFER (ta, 1);
1602	return 1;	1648	return 1;
1603	}	1649	}
1604	else	1650	else
1605	return 0;	1651	return 0;
1606	}	1652	}
1607		1653
1608	static void
1609	api_schedule (void)
1610	{
1611	dTHX;
1612	struct transfer_args ta;
1613
1614	prepare_schedule (aTHX_ &ta);
1615	TRANSFER (ta, 1);
1616	}
1617
1618	static int	1654	static int
1619	api_cede (void)	1655	api_cede_notself (pTHX)
1620	{	1656	{
1621	dTHX;	1657	if (coro_nready)
		1658	{
1622	struct transfer_args ta;	1659	struct coro_transfer_args ta;
1623		1660
1624	prepare_cede (aTHX_ &ta);	1661	prepare_cede_notself (aTHX_ &ta);
1625
1626	if (expect_true (ta.prev != ta.next))
1627	{
1628	TRANSFER (ta, 1);	1662	TRANSFER (ta, 1);
1629	return 1;	1663	return 1;
1630	}	1664	}
1631	else	1665	else
1632	return 0;	1666	return 0;
1633	}	1667	}
1634		1668
1635	static int	1669	static void
1636	api_cede_notself (void)
1637	{
1638	dTHX;
1639	struct transfer_args ta;
1640
1641	if (prepare_cede_notself (aTHX_ &ta))
1642	{
1643	TRANSFER (ta, 1);
1644	return 1;
1645	}
1646	else
1647	return 0;
1648	}
1649
1650	static void
1651	api_trace (SV *coro_sv, int flags)	1670	api_trace (pTHX_ SV *coro_sv, int flags)
1652	{	1671	{
1653	dTHX;
1654	struct coro *coro = SvSTATE (coro_sv);	1672	struct coro *coro = SvSTATE (coro_sv);
1655		1673
1656	if (flags & CC_TRACE)	1674	if (flags & CC_TRACE)
1657	{	1675	{
1658	if (!coro->cctx)	1676	if (!coro->cctx)
1659	coro->cctx = cctx_new ();	1677	coro->cctx = cctx_new_run ();
1660	else if (!(coro->cctx->flags & CC_TRACE))	1678	else if (!(coro->cctx->flags & CC_TRACE))
1661	croak ("cannot enable tracing on coroutine with custom stack");	1679	croak ("cannot enable tracing on coroutine with custom stack,");
1662		1680
1663	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1681	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1664	}	1682	}
1665	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1683	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1666	{	1684	{
…		…
1671	else	1689	else
1672	coro->slot->runops = RUNOPS_DEFAULT;	1690	coro->slot->runops = RUNOPS_DEFAULT;
1673	}	1691	}
1674	}	1692	}
1675		1693
1676	#if 0
1677	static int
1678	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1679	{
1680	AV *padlist;
1681	AV *av = (AV *)mg->mg_obj;
1682
1683	abort ();
1684
1685	return 0;
1686	}
1687
1688	static MGVTBL coro_gensub_vtbl = {
1689	0, 0, 0, 0,
1690	coro_gensub_free
1691	};
1692	#endif
1693
1694	/*****************************************************************************/	1694	/*****************************************************************************/
1695	/* PerlIO::cede */	1695	/* PerlIO::cede */
1696		1696
1697	typedef struct	1697	typedef struct
1698	{	1698	{
…		…
1725	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1725	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726	double now = nvtime ();	1726	double now = nvtime ();
1727		1727
1728	if (now >= self->next)	1728	if (now >= self->next)
1729	{	1729	{
1730	api_cede ();	1730	api_cede (aTHX);
1731	self->next = now + self->every;	1731	self->next = now + self->every;
1732	}	1732	}
1733		1733
1734	return PerlIOBuf_flush (aTHX_ f);	1734	return PerlIOBuf_flush (aTHX_ f);
1735	}	1735	}
…		…
1764	PerlIOBuf_get_ptr,	1764	PerlIOBuf_get_ptr,
1765	PerlIOBuf_get_cnt,	1765	PerlIOBuf_get_cnt,
1766	PerlIOBuf_set_ptrcnt,	1766	PerlIOBuf_set_ptrcnt,
1767	};	1767	};
1768		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	/*****************************************************************************/
1769		2115
1770	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2116	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1771		2117
1772	PROTOTYPES: DISABLE	2118	PROTOTYPES: DISABLE
1773		2119
1774	BOOT:	2120	BOOT:
1775	{	2121	{
1776	#ifdef USE_ITHREADS	2122	#ifdef USE_ITHREADS
1777	MUTEX_INIT (&coro_lock);
1778	# if CORO_PTHREAD	2123	# if CORO_PTHREAD
1779	coro_thx = PERL_GET_CONTEXT;	2124	coro_thx = PERL_GET_CONTEXT;
1780	# endif	2125	# endif
1781	#endif	2126	#endif
1782	BOOT_PAGESIZE;	2127	BOOT_PAGESIZE;
…		…
1803	main_top_env = PL_top_env;	2148	main_top_env = PL_top_env;
1804		2149
1805	while (main_top_env->je_prev)	2150	while (main_top_env->je_prev)
1806	main_top_env = main_top_env->je_prev;	2151	main_top_env = main_top_env->je_prev;
1807		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
1808	coroapi.ver = CORO_API_VERSION;	2165	coroapi.ver = CORO_API_VERSION;
1809	coroapi.rev = CORO_API_REVISION;	2166	coroapi.rev = CORO_API_REVISION;
		2167
1810	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;
1811		2176
1812	{	2177	{
1813	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2178	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1814		2179
1815	if (!svp) croak ("Time::HiRes is required");	2180	if (!svp) croak ("Time::HiRes is required");
…		…
1848	av_push (coro->args, newSVsv (ST (i)));	2213	av_push (coro->args, newSVsv (ST (i)));
1849	}	2214	}
1850	OUTPUT:	2215	OUTPUT:
1851	RETVAL	2216	RETVAL
1852		2217
1853	# these not obviously related functions are all rolled into the same xs
1854	# function to increase chances that they all will call transfer with the same
1855	# stack offset
1856	void	2218	void
1857	_set_stacklevel (...)	2219	_set_stacklevel (...)
1858	ALIAS:	2220	CODE:
1859	Coro::State::transfer = 1	2221	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1860	Coro::schedule = 2
1861	Coro::cede = 3
1862	Coro::cede_notself = 4
1863	CODE:
1864	{
1865	struct transfer_args ta;
1866		2222
1867	PUTBACK;	2223	void
1868	switch (ix)	2224	transfer (...)
1869	{	2225	PROTOTYPE: $$
1870	case 0:	2226	CODE:
1871	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	2227	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1872	ta.next = 0;
1873	break;
1874
1875	case 1:
1876	if (items != 2)
1877	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1878
1879	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1880	break;
1881
1882	case 2:
1883	prepare_schedule (aTHX_ &ta);
1884	break;
1885
1886	case 3:
1887	prepare_cede (aTHX_ &ta);
1888	break;
1889
1890	case 4:
1891	if (!prepare_cede_notself (aTHX_ &ta))
1892	XSRETURN_EMPTY;
1893
1894	break;
1895	}
1896	SPAGAIN;
1897
1898	BARRIER;
1899	PUTBACK;
1900	TRANSFER (ta, 0);
1901	SPAGAIN; /* might be the sp of a different coroutine now */
1902	/* be extra careful not to ever do anything after TRANSFER */
1903	}
1904		2228
1905	bool	2229	bool
1906	_destroy (SV *coro_sv)	2230	_destroy (SV *coro_sv)
1907	CODE:	2231	CODE:
1908	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2232	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1915	CODE:	2239	CODE:
1916	_exit (code);	2240	_exit (code);
1917		2241
1918	int	2242	int
1919	cctx_stacksize (int new_stacksize = 0)	2243	cctx_stacksize (int new_stacksize = 0)
		2244	PROTOTYPE: ;$
1920	CODE:	2245	CODE:
1921	RETVAL = cctx_stacksize;	2246	RETVAL = cctx_stacksize;
1922	if (new_stacksize)	2247	if (new_stacksize)
1923	{	2248	{
1924	cctx_stacksize = new_stacksize;	2249	cctx_stacksize = new_stacksize;
…		…
1927	OUTPUT:	2252	OUTPUT:
1928	RETVAL	2253	RETVAL
1929		2254
1930	int	2255	int
1931	cctx_max_idle (int max_idle = 0)	2256	cctx_max_idle (int max_idle = 0)
		2257	PROTOTYPE: ;$
1932	CODE:	2258	CODE:
1933	RETVAL = cctx_max_idle;	2259	RETVAL = cctx_max_idle;
1934	if (max_idle > 1)	2260	if (max_idle > 1)
1935	cctx_max_idle = max_idle;	2261	cctx_max_idle = max_idle;
1936	OUTPUT:	2262	OUTPUT:
1937	RETVAL	2263	RETVAL
1938		2264
1939	int	2265	int
1940	cctx_count ()	2266	cctx_count ()
		2267	PROTOTYPE:
1941	CODE:	2268	CODE:
1942	RETVAL = cctx_count;	2269	RETVAL = cctx_count;
1943	OUTPUT:	2270	OUTPUT:
1944	RETVAL	2271	RETVAL
1945		2272
1946	int	2273	int
1947	cctx_idle ()	2274	cctx_idle ()
		2275	PROTOTYPE:
1948	CODE:	2276	CODE:
1949	RETVAL = cctx_idle;	2277	RETVAL = cctx_idle;
1950	OUTPUT:	2278	OUTPUT:
1951	RETVAL	2279	RETVAL
1952		2280
1953	void	2281	void
1954	list ()	2282	list ()
		2283	PROTOTYPE:
1955	PPCODE:	2284	PPCODE:
1956	{	2285	{
1957	struct coro *coro;	2286	struct coro *coro;
1958	for (coro = coro_first; coro; coro = coro->next)	2287	for (coro = coro_first; coro; coro = coro->next)
1959	if (coro->hv)	2288	if (coro->hv)
…		…
2018	RETVAL = boolSV (coro->flags & ix);	2347	RETVAL = boolSV (coro->flags & ix);
2019	OUTPUT:	2348	OUTPUT:
2020	RETVAL	2349	RETVAL
2021		2350
2022	void	2351	void
		2352	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2353	PROTOTYPE: $;$
		2354	CODE:
		2355	SvREFCNT_dec (self->throw);
		2356	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2357
		2358	void
2023	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
2024		2362
2025	SV *	2363	SV *
2026	has_cctx (Coro::State coro)	2364	has_cctx (Coro::State coro)
2027	PROTOTYPE: $	2365	PROTOTYPE: $
2028	CODE:	2366	CODE:
…		…
2052	OUTPUT:	2390	OUTPUT:
2053	RETVAL	2391	RETVAL
2054		2392
2055	void	2393	void
2056	force_cctx ()	2394	force_cctx ()
		2395	PROTOTYPE:
2057	CODE:	2396	CODE:
2058	struct coro *coro = SvSTATE (coro_current);
2059	coro->cctx->idle_sp = 0;	2397	SvSTATE_current->cctx->idle_sp = 0;
2060		2398
2061	void	2399	void
2062	swap_defsv (Coro::State self)	2400	swap_defsv (Coro::State self)
2063	PROTOTYPE: $	2401	PROTOTYPE: $
2064	ALIAS:	2402	ALIAS:
2065	swap_defav = 1	2403	swap_defav = 1
2066	CODE:	2404	CODE:
2067	if (!self->slot)	2405	if (!self->slot)
2068	croak ("cannot swap state with coroutine that has no saved state");	2406	croak ("cannot swap state with coroutine that has no saved state,");
2069	else	2407	else
2070	{	2408	{
2071	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2409	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2072	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2410	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2073		2411
…		…
2098		2436
2099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2437	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2100	coro_ready[i] = newAV ();	2438	coro_ready[i] = newAV ();
2101		2439
2102	{	2440	{
2103	SV *sv = perl_get_sv ("Coro::API", TRUE);	2441	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2104	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2105		2442
2106	coroapi.schedule = api_schedule;	2443	coroapi.schedule = api_schedule;
2107	coroapi.cede = api_cede;	2444	coroapi.cede = api_cede;
2108	coroapi.cede_notself = api_cede_notself;	2445	coroapi.cede_notself = api_cede_notself;
2109	coroapi.ready = api_ready;	2446	coroapi.ready = api_ready;
2110	coroapi.is_ready = api_is_ready;	2447	coroapi.is_ready = api_is_ready;
2111	coroapi.nready = &coro_nready;	2448	coroapi.nready = coro_nready;
2112	coroapi.current = coro_current;	2449	coroapi.current = coro_current;
2113		2450
2114	GCoroAPI = &coroapi;	2451	GCoroAPI = &coroapi;
2115	sv_setiv (sv, (IV)&coroapi);	2452	sv_setiv (sv, (IV)&coroapi);
2116	SvREADONLY_on (sv);	2453	SvREADONLY_on (sv);
2117	}	2454	}
2118	}	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);
2119		2471
2120	void	2472	void
2121	_set_current (SV *current)	2473	_set_current (SV *current)
2122	PROTOTYPE: $	2474	PROTOTYPE: $
2123	CODE:	2475	CODE:
…		…
2126		2478
2127	void	2479	void
2128	_set_readyhook (SV *hook)	2480	_set_readyhook (SV *hook)
2129	PROTOTYPE: $	2481	PROTOTYPE: $
2130	CODE:	2482	CODE:
2131	LOCK;
2132	SvREFCNT_dec (coro_readyhook);	2483	SvREFCNT_dec (coro_readyhook);
2133	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2484	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2134	UNLOCK;
2135		2485
2136	int	2486	int
2137	prio (Coro::State coro, int newprio = 0)	2487	prio (Coro::State coro, int newprio = 0)
		2488	PROTOTYPE: $;$
2138	ALIAS:	2489	ALIAS:
2139	nice = 1	2490	nice = 1
2140	CODE:	2491	CODE:
2141	{	2492	{
2142	RETVAL = coro->prio;	2493	RETVAL = coro->prio;
…		…
2157		2508
2158	SV *	2509	SV *
2159	ready (SV *self)	2510	ready (SV *self)
2160	PROTOTYPE: $	2511	PROTOTYPE: $
2161	CODE:	2512	CODE:
2162	RETVAL = boolSV (api_ready (self));	2513	RETVAL = boolSV (api_ready (aTHX_ self));
2163	OUTPUT:	2514	OUTPUT:
2164	RETVAL	2515	RETVAL
2165		2516
2166	int	2517	int
2167	nready (...)	2518	nready (...)
…		…
2169	CODE:	2520	CODE:
2170	RETVAL = coro_nready;	2521	RETVAL = coro_nready;
2171	OUTPUT:	2522	OUTPUT:
2172	RETVAL	2523	RETVAL
2173		2524
2174	void
2175	throw (Coro::State self, SV *throw = &PL_sv_undef)
2176	PROTOTYPE: $;$
2177	CODE:
2178	SvREFCNT_dec (self->throw);
2179	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2180
2181	# for async_pool speedup	2525	# for async_pool speedup
2182	void	2526	void
2183	_pool_1 (SV *cb)	2527	_pool_1 (SV *cb)
2184	CODE:	2528	CODE:
2185	{	2529	{
2186	struct coro *coro = SvSTATE (coro_current);
2187	HV *hv = (HV *)SvRV (coro_current);	2530	HV *hv = (HV *)SvRV (coro_current);
		2531	struct coro *coro = SvSTATE_hv ((SV *)hv);
2188	AV *defav = GvAV (PL_defgv);	2532	AV *defav = GvAV (PL_defgv);
2189	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2533	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2190	AV *invoke_av;	2534	AV *invoke_av;
2191	int i, len;	2535	int i, len;
2192		2536
…		…
2213	{	2557	{
2214	av_fill (defav, len - 1);	2558	av_fill (defav, len - 1);
2215	for (i = 0; i < len; ++i)	2559	for (i = 0; i < len; ++i)
2216	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]));
2217	}	2561	}
2218
2219	SvREFCNT_dec (invoke);
2220	}	2562	}
2221		2563
2222	void	2564	void
2223	_pool_2 (SV *cb)	2565	_pool_2 (SV *cb)
2224	CODE:	2566	CODE:
2225	{	2567	{
2226	struct coro *coro = SvSTATE (coro_current);	2568	struct coro *coro = SvSTATE_current;
2227		2569
2228	sv_setsv (cb, &PL_sv_undef);	2570	sv_setsv (cb, &PL_sv_undef);
2229		2571
2230	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2572	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2231	coro->saved_deffh = 0;	2573	coro->saved_deffh = 0;
…		…
2244	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2586	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2245		2587
2246	coro->prio = 0;	2588	coro->prio = 0;
2247		2589
2248	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2590	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2249	api_trace (coro_current, 0);	2591	api_trace (aTHX_ coro_current, 0);
2250		2592
2251	av_push (av_async_pool, newSVsv (coro_current));	2593	av_push (av_async_pool, newSVsv (coro_current));
2252	}	2594	}
2253
2254	#if 0
2255
2256	void
2257	_generator_call (...)
2258	PROTOTYPE: @
2259	PPCODE:
2260	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2261	xxxx
2262	abort ();
2263
2264	SV *
2265	gensub (SV *sub, ...)
2266	PROTOTYPE: &;@
2267	CODE:
2268	{
2269	struct coro *coro;
2270	MAGIC *mg;
2271	CV *xcv;
2272	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2273	int i;
2274
2275	CvGV (ncv) = CvGV (cv);
2276	CvFILE (ncv) = CvFILE (cv);
2277
2278	Newz (0, coro, 1, struct coro);
2279	coro->args = newAV ();
2280	coro->flags = CF_NEW;
2281
2282	av_extend (coro->args, items - 1);
2283	for (i = 1; i < items; i++)
2284	av_push (coro->args, newSVsv (ST (i)));
2285
2286	CvISXSUB_on (ncv);
2287	CvXSUBANY (ncv).any_ptr = (void *)coro;
2288
2289	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2290
2291	CvXSUB (ncv) = CvXSUB (xcv);
2292	CvANON_on (ncv);
2293
2294	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2295	RETVAL = newRV_noinc ((SV *)ncv);
2296	}
2297	OUTPUT:
2298	RETVAL
2299
2300	#endif
2301		2595
2302		2596
2303	MODULE = Coro::State PACKAGE = Coro::AIO	2597	MODULE = Coro::State PACKAGE = Coro::AIO
2304		2598
2305	void	2599	void
2306	_get_state (SV *self)	2600	_get_state (SV *self)
		2601	PROTOTYPE: $
2307	PPCODE:	2602	PPCODE:
2308	{	2603	{
2309	AV *defav = GvAV (PL_defgv);	2604	AV *defav = GvAV (PL_defgv);
2310	AV *av = newAV ();	2605	AV *av = newAV ();
2311	int i;	2606	int i;
…		…
2326		2621
2327	av_push (av, data_sv);	2622	av_push (av, data_sv);
2328		2623
2329	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2624	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2330		2625
2331	api_ready (self);	2626	api_ready (aTHX_ self);
2332	}	2627	}
2333		2628
2334	void	2629	void
2335	_set_state (SV *state)	2630	_set_state (SV *state)
2336	PROTOTYPE: $	2631	PROTOTYPE: $
…		…
2354	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2649	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2355		2650
2356	BOOT:	2651	BOOT:
2357	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2652	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2358		2653
2359	SV *	2654	void
2360	_schedule (...)	2655	_schedule (...)
2361	PROTOTYPE: @
2362	CODE:	2656	CODE:
2363	{	2657	{
2364	static int incede;	2658	static int incede;
2365		2659
2366	api_cede_notself ();	2660	api_cede_notself (aTHX);
2367		2661
2368	++incede;	2662	++incede;
2369	while (coro_nready >= incede && api_cede ())	2663	while (coro_nready >= incede && api_cede (aTHX))
2370	;	2664	;
2371		2665
2372	sv_setsv (sv_activity, &PL_sv_undef);	2666	sv_setsv (sv_activity, &PL_sv_undef);
2373	if (coro_nready >= incede)	2667	if (coro_nready >= incede)
2374	{	2668	{
…		…
2384		2678
2385	MODULE = Coro::State PACKAGE = PerlIO::cede	2679	MODULE = Coro::State PACKAGE = PerlIO::cede
2386		2680
2387	BOOT:	2681	BOOT:
2388	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2682	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		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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