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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.257 by root, Sun Nov 9 15:35:44 2008 UTC vs.
Revision 1.281 by root, Sun Nov 16 10:12:38 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;
…		…
181	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
182	static AV *main_mainstack; /* used to differentiate between $main and others */	167	static AV *main_mainstack; /* used to differentiate between $main and others */
183	static JMPENV *main_top_env;	168	static JMPENV *main_top_env;
184	static HV *coro_state_stash, *coro_stash;	169	static HV *coro_state_stash, *coro_stash;
185	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */	170	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
		171	static volatile struct coro *transfer_next;
186		172
187	static GV *irsgv; /* $/ */	173	static GV *irsgv; /* $/ */
188	static GV *stdoutgv; /* *STDOUT */	174	static GV *stdoutgv; /* *STDOUT */
189	static SV *rv_diehook;	175	static SV *rv_diehook;
190	static SV *rv_warnhook;	176	static SV *rv_warnhook;
…		…
209	CC_TRACE_LINE = 0x10, /* trace each statement */	195	CC_TRACE_LINE = 0x10, /* trace each statement */
210	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	196	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
211	};	197	};
212		198
213	/* this is a structure representing a c-level coroutine */	199	/* this is a structure representing a c-level coroutine */
214	typedef struct coro_cctx {	200	typedef struct coro_cctx
		201	{
215	struct coro_cctx *next;	202	struct coro_cctx *next;
216		203
217	/* the stack */	204	/* the stack */
218	void *sptr;	205	void *sptr;
219	size_t ssize;	206	size_t ssize;
…		…
237	CF_NEW = 0x0004, /* has never been switched to */	224	CF_NEW = 0x0004, /* has never been switched to */
238	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	225	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
239	};	226	};
240		227
241	/* the structure where most of the perl state is stored, overlaid on the cxstack */	228	/* the structure where most of the perl state is stored, overlaid on the cxstack */
242	typedef struct {	229	typedef struct
		230	{
243	SV *defsv;	231	SV *defsv;
244	AV *defav;	232	AV *defav;
245	SV *errsv;	233	SV *errsv;
246	SV *irsgv;	234	SV *irsgv;
247	#define VAR(name,type) type name;	235	#define VAR(name,type) type name;
…		…
251		239
252	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	240	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
253		241
254	/* this is a structure representing a perl-level coroutine */	242	/* this is a structure representing a perl-level coroutine */
255	struct coro {	243	struct coro {
256	/* the c coroutine allocated to this perl coroutine, if any */	244	/* the C coroutine allocated to this perl coroutine, if any */
257	coro_cctx *cctx;	245	coro_cctx *cctx;
258		246
259	/* process data */	247	/* process data */
		248	struct CoroSLF slf_frame; /* saved slf frame */
260	AV *mainstack;	249	AV *mainstack;
261	perl_slots *slot; /* basically the saved sp */	250	perl_slots *slot; /* basically the saved sp */
262		251
263	AV *args; /* data associated with this coroutine (initial args) */	252	AV *args; /* data associated with this coroutine (initial args) */
264	int refcnt; /* coroutines are refcounted, yes */	253	int refcnt; /* coroutines are refcounted, yes */
265	int flags; /* CF_ flags */	254	int flags; /* CF_ flags */
266	HV *hv; /* the perl hash associated with this coro, if any */	255	HV *hv; /* the perl hash associated with this coro, if any */
		256	void (*on_destroy)(pTHX_ struct coro *coro);
267		257
268	/* statistics */	258	/* statistics */
269	int usecount; /* number of transfers to this coro */	259	int usecount; /* number of transfers to this coro */
270		260
271	/* coro process data */	261	/* coro process data */
…		…
279	struct coro *next, *prev;	269	struct coro *next, *prev;
280	};	270	};
281		271
282	typedef struct coro *Coro__State;	272	typedef struct coro *Coro__State;
283	typedef struct coro *Coro__State_or_hashref;	273	typedef struct coro *Coro__State_or_hashref;
		274
		275	static struct CoroSLF slf_frame; /* the current slf frame */
284		276
285	/** Coro ********************************************************************/	277	/** Coro ********************************************************************/
286		278
287	#define PRIO_MAX 3	279	#define PRIO_MAX 3
288	#define PRIO_HIGH 1	280	#define PRIO_HIGH 1
…		…
293		285
294	/* for Coro.pm */	286	/* for Coro.pm */
295	static SV *coro_current;	287	static SV *coro_current;
296	static SV *coro_readyhook;	288	static SV *coro_readyhook;
297	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	289	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
298	static int coro_nready;
299	static struct coro *coro_first;	290	static struct coro *coro_first;
		291	#define coro_nready coroapi.nready
300		292
301	/** lowlevel stuff **********************************************************/	293	/** lowlevel stuff **********************************************************/
302		294
303	static SV *	295	static SV *
304	coro_get_sv (pTHX_ const char *name, int create)	296	coro_get_sv (pTHX_ const char *name, int create)
…		…
397	static MGVTBL coro_cv_vtbl = {	389	static MGVTBL coro_cv_vtbl = {
398	0, 0, 0, 0,	390	0, 0, 0, 0,
399	coro_cv_free	391	coro_cv_free
400	};	392	};
401		393
402	#define CORO_MAGIC(sv, type) \	394	#define CORO_MAGIC(sv, type) \
403	SvMAGIC (sv) \	395	expect_true (SvMAGIC (sv)) \
404	? SvMAGIC (sv)->mg_type == type \	396	? expect_true (SvMAGIC (sv)->mg_type == type) \
405	? SvMAGIC (sv) \	397	? SvMAGIC (sv) \
406	: mg_find (sv, type) \	398	: mg_find (sv, type) \
407	: 0	399	: 0
408		400
409	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	401	#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)	402	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
411		403
412	static struct coro *	404	INLINE struct coro *
413	SvSTATE_ (pTHX_ SV *coro)	405	SvSTATE_ (pTHX_ SV *coro)
414	{	406	{
415	HV *stash;	407	HV *stash;
416	MAGIC *mg;	408	MAGIC *mg;
417		409
…		…
432	mg = CORO_MAGIC_state (coro);	424	mg = CORO_MAGIC_state (coro);
433	return (struct coro *)mg->mg_ptr;	425	return (struct coro *)mg->mg_ptr;
434	}	426	}
435		427
436	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	428	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		429
		430	/* fastert than SvSTATE, but expects a coroutine hv */
		431	INLINE struct coro *
		432	SvSTATE_hv (SV *sv)
		433	{
		434	MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
		435	? SvMAGIC (sv)
		436	: mg_find (sv, CORO_MAGIC_type_state);
		437
		438	return (struct coro *)mg->mg_ptr;
		439	}
		440
		441	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
437		442
438	/* the next two functions merely cache the padlists */	443	/* the next two functions merely cache the padlists */
439	static void	444	static void
440	get_padlist (pTHX_ CV *cv)	445	get_padlist (pTHX_ CV *cv)
441	{	446	{
…		…
508	CvPADLIST (cv) = (AV *)POPs;	513	CvPADLIST (cv) = (AV *)POPs;
509	}	514	}
510		515
511	PUTBACK;	516	PUTBACK;
512	}	517	}
		518
		519	slf_frame = c->slf_frame;
513	}	520	}
514		521
515	static void	522	static void
516	save_perl (pTHX_ Coro__State c)	523	save_perl (pTHX_ Coro__State c)
517	{	524	{
		525	c->slf_frame = slf_frame;
		526
518	{	527	{
519	dSP;	528	dSP;
520	I32 cxix = cxstack_ix;	529	I32 cxix = cxstack_ix;
521	PERL_CONTEXT *ccstk = cxstack;	530	PERL_CONTEXT *ccstk = cxstack;
522	PERL_SI *top_si = PL_curstackinfo;	531	PERL_SI *top_si = PL_curstackinfo;
…		…
589	#undef VAR	598	#undef VAR
590	}	599	}
591	}	600	}
592		601
593	/*	602	/*
594	* allocate various perl stacks. This is an exact copy	603	* allocate various perl stacks. This is almost an exact copy
595	* of perl.c:init_stacks, except that it uses less memory	604	* of perl.c:init_stacks, except that it uses less memory
596	* on the (sometimes correct) assumption that coroutines do	605	* on the (sometimes correct) assumption that coroutines do
597	* not usually need a lot of stackspace.	606	* not usually need a lot of stackspace.
598	*/	607	*/
599	#if CORO_PREFER_PERL_FUNCTIONS	608	#if CORO_PREFER_PERL_FUNCTIONS
…		…
801		810
802	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	811	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
803	}	812	}
804		813
805	static void	814	static void
		815	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		816	{
		817	/* kind of mega-hacky, but works */
		818	ta->next = ta->prev = (struct coro *)ta;
		819	}
		820
		821	static int
		822	slf_check_nop (pTHX_ struct CoroSLF *frame)
		823	{
		824	return 0;
		825	}
		826
		827	static void
806	coro_setup (pTHX_ struct coro *coro)	828	coro_setup (pTHX_ struct coro *coro)
807	{	829	{
808	/*	830	/*
809	* emulate part of the perl startup here.	831	* emulate part of the perl startup here.
810	*/	832	*/
…		…
834	PL_rs = newSVsv (GvSV (irsgv));	856	PL_rs = newSVsv (GvSV (irsgv));
835	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);	857	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
836		858
837	{	859	{
838	dSP;	860	dSP;
839	LOGOP myop;	861	UNOP myop;
840		862
841	Zero (&myop, 1, LOGOP);	863	Zero (&myop, 1, UNOP);
842	myop.op_next = Nullop;	864	myop.op_next = Nullop;
843	myop.op_flags = OPf_WANT_VOID;	865	myop.op_flags = OPf_WANT_VOID;
844		866
845	PUSHMARK (SP);	867	PUSHMARK (SP);
846	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	868	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
849	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	871	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
850	SPAGAIN;	872	SPAGAIN;
851	}	873	}
852		874
853	/* this newly created coroutine might be run on an existing cctx which most	875	/* this newly created coroutine might be run on an existing cctx which most
854	* likely was suspended in set_stacklevel, called from entersub.	876	* 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	*/	877	*/
858	ENTER;	878	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		879	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
859	}	880	}
860		881
861	static void	882	static void
862	coro_destruct (pTHX_ struct coro *coro)	883	coro_destruct (pTHX_ struct coro *coro)
863	{	884	{
…		…
892	SvREFCNT_dec (coro->throw);	913	SvREFCNT_dec (coro->throw);
893		914
894	coro_destruct_stacks (aTHX);	915	coro_destruct_stacks (aTHX);
895	}	916	}
896		917
897	static void	918	INLINE void
898	free_coro_mortal (pTHX)	919	free_coro_mortal (pTHX)
899	{	920	{
900	if (expect_true (coro_mortal))	921	if (expect_true (coro_mortal))
901	{	922	{
902	SvREFCNT_dec (coro_mortal);	923	SvREFCNT_dec (coro_mortal);
…		…
907	static int	928	static int
908	runops_trace (pTHX)	929	runops_trace (pTHX)
909	{	930	{
910	COP *oldcop = 0;	931	COP *oldcop = 0;
911	int oldcxix = -2;	932	int oldcxix = -2;
912	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	933	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
913	coro_cctx *cctx = coro->cctx;	934	coro_cctx *cctx = coro->cctx;
914		935
915	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	936	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
916	{	937	{
917	PERL_ASYNC_CHECK ();	938	PERL_ASYNC_CHECK ();
…		…
1026		1047
1027	TAINT_NOT;	1048	TAINT_NOT;
1028	return 0;	1049	return 0;
1029	}	1050	}
1030		1051
		1052	static void
		1053	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
		1054	{
		1055	ta->prev = (struct coro *)cctx;
		1056	ta->next = 0;
		1057	}
		1058
1031	/* inject a fake call to Coro::State::_cctx_init into the execution */	1059	/* 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 */	1060	/* _cctx_init should be careful, as it could be called at almost any time */
1033	/* during execution of a perl program */	1061	/* during execution of a perl program */
		1062	/* also initialises PL_top_env */
1034	static void NOINLINE	1063	static void NOINLINE
1035	cctx_prepare (pTHX_ coro_cctx *cctx)	1064	cctx_prepare (pTHX_ coro_cctx *cctx)
1036	{	1065	{
1037	dSP;	1066	dSP;
1038	LOGOP myop;	1067	UNOP myop;
1039		1068
1040	PL_top_env = &PL_start_env;	1069	PL_top_env = &PL_start_env;
1041		1070
1042	if (cctx->flags & CC_TRACE)	1071	if (cctx->flags & CC_TRACE)
1043	PL_runops = runops_trace;	1072	PL_runops = runops_trace;
1044		1073
1045	Zero (&myop, 1, LOGOP);	1074	Zero (&myop, 1, UNOP);
1046	myop.op_next = PL_op;	1075	myop.op_next = PL_op;
1047	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1076	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1048		1077
1049	PUSHMARK (SP);	1078	PUSHMARK (SP);
1050	EXTEND (SP, 2);	1079	EXTEND (SP, 2);
1051	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1080	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1052	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1081	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1053	PUTBACK;	1082	PUTBACK;
1054	PL_op = (OP *)&myop;	1083	PL_op = (OP *)&myop;
1055	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1084	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1056	SPAGAIN;	1085	SPAGAIN;
1057	}	1086	}
1058		1087
		1088	/* the tail of transfer: execute stuff we can only do after a transfer */
		1089	INLINE void
		1090	transfer_tail (pTHX)
		1091	{
		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);
		1097
		1098	if (expect_false (next->throw))
		1099	{
		1100	SV *exception = sv_2mortal (next->throw);
		1101
		1102	next->throw = 0;
		1103	sv_setsv (ERRSV, exception);
		1104	croak (0);
		1105	}
		1106	}
		1107
1059	/*	1108	/*
1060	* this is a _very_ stripped down perl interpreter ;)	1109	* this is a _very_ stripped down perl interpreter ;)
1061	*/	1110	*/
1062	static void	1111	static void
1063	cctx_run (void *arg)	1112	cctx_run (void *arg)
…		…
1068	# endif	1117	# endif
1069	#endif	1118	#endif
1070	{	1119	{
1071	dTHX;	1120	dTHX;
1072		1121
1073	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1122	/* normally we would need to skip the entersub here */
1074	UNLOCK;	1123	/* 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;	1124	/* PL_nop = PL_nop->op_next */
1078		1125
1079	/* inject a fake subroutine call to cctx_init */	1126	/* inject a fake subroutine call to cctx_init */
1080	cctx_prepare (aTHX_ (coro_cctx *)arg);	1127	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1128
		1129	/* cctx_run is the alternative tail of transfer() */
		1130	/* TODO: throwing an exception here might be deadly, VERIFY */
		1131	transfer_tail (aTHX);
1081		1132
1082	/* somebody or something will hit me for both perl_run and PL_restartop */	1133	/* somebody or something will hit me for both perl_run and PL_restartop */
1083	PL_restartop = PL_op;	1134	PL_restartop = PL_op;
1084	perl_run (PL_curinterp);	1135	perl_run (PL_curinterp);
1085		1136
…		…
1097		1148
1098	static coro_cctx *	1149	static coro_cctx *
1099	cctx_new ()	1150	cctx_new ()
1100	{	1151	{
1101	coro_cctx *cctx;	1152	coro_cctx *cctx;
		1153
		1154	++cctx_count;
		1155	New (0, cctx, 1, coro_cctx);
		1156
		1157	cctx->gen = cctx_gen;
		1158	cctx->flags = 0;
		1159	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1160
		1161	return cctx;
		1162	}
		1163
		1164	/* create a new cctx only suitable as source */
		1165	static coro_cctx *
		1166	cctx_new_empty ()
		1167	{
		1168	coro_cctx *cctx = cctx_new ();
		1169
		1170	cctx->sptr = 0;
		1171	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1172
		1173	return cctx;
		1174	}
		1175
		1176	/* create a new cctx suitable as destination/running a perl interpreter */
		1177	static coro_cctx *
		1178	cctx_new_run ()
		1179	{
		1180	coro_cctx *cctx = cctx_new ();
1102	void *stack_start;	1181	void *stack_start;
1103	size_t stack_size;	1182	size_t stack_size;
1104
1105	++cctx_count;
1106	Newz (0, cctx, 1, coro_cctx);
1107
1108	cctx->gen = cctx_gen;
1109		1183
1110	#if HAVE_MMAP	1184	#if HAVE_MMAP
1111	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1185	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1112	/* mmap supposedly does allocate-on-write for us */	1186	/* 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);	1187	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1114		1188
1115	if (cctx->sptr != (void *)-1)	1189	if (cctx->sptr != (void *)-1)
1116	{	1190	{
1117	# if CORO_STACKGUARD	1191	#if CORO_STACKGUARD
1118	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1192	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1119	# endif	1193	#endif
1120	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1194	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1121	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1195	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1122	cctx->flags |= CC_MAPPED;	1196	cctx->flags |= CC_MAPPED;
1123	}	1197	}
1124	else	1198	else
1125	#endif	1199	#endif
1126	{	1200	{
1127	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1201	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1128	New (0, cctx->sptr, cctx_stacksize, long);	1202	New (0, cctx->sptr, cctx_stacksize, long);
1129		1203
1130	if (!cctx->sptr)	1204	if (!cctx->sptr)
1131	{	1205	{
1132	perror ("FATAL: unable to allocate stack for coroutine");	1206	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1133	_exit (EXIT_FAILURE);	1207	_exit (EXIT_FAILURE);
1134	}	1208	}
1135		1209
1136	stack_start = cctx->sptr;	1210	stack_start = cctx->sptr;
1137	stack_size = cctx->ssize;	1211	stack_size = cctx->ssize;
1138	}	1212	}
1139		1213
1140	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1214	#if CORO_USE_VALGRIND
		1215	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
		1216	#endif
		1217
1141	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1218	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1142		1219
1143	return cctx;	1220	return cctx;
1144	}	1221	}
1145		1222
…		…
1153	coro_destroy (&cctx->cctx);	1230	coro_destroy (&cctx->cctx);
1154		1231
1155	/* coro_transfer creates new, empty cctx's */	1232	/* coro_transfer creates new, empty cctx's */
1156	if (cctx->sptr)	1233	if (cctx->sptr)
1157	{	1234	{
1158	#if CORO_USE_VALGRIND	1235	#if CORO_USE_VALGRIND
1159	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1236	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1160	#endif	1237	#endif
1161		1238
1162	#if HAVE_MMAP	1239	#if HAVE_MMAP
1163	if (cctx->flags & CC_MAPPED)	1240	if (cctx->flags & CC_MAPPED)
1164	munmap (cctx->sptr, cctx->ssize);	1241	munmap (cctx->sptr, cctx->ssize);
1165	else	1242	else
…		…
1186	return cctx;	1263	return cctx;
1187		1264
1188	cctx_destroy (cctx);	1265	cctx_destroy (cctx);
1189	}	1266	}
1190		1267
1191	return cctx_new ();	1268	return cctx_new_run ();
1192	}	1269	}
1193		1270
1194	static void	1271	static void
1195	cctx_put (coro_cctx *cctx)	1272	cctx_put (coro_cctx *cctx)
1196	{	1273	{
1197	assert (("cctx_put called on non-initialised cctx", cctx->sptr));	1274	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1198		1275
1199	/* free another cctx if overlimit */	1276	/* free another cctx if overlimit */
1200	if (expect_false (cctx_idle >= cctx_max_idle))	1277	if (expect_false (cctx_idle >= cctx_max_idle))
1201	{	1278	{
1202	coro_cctx *first = cctx_first;	1279	coro_cctx *first = cctx_first;
…		…
1217	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1294	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1218	{	1295	{
1219	if (expect_true (prev != next))	1296	if (expect_true (prev != next))
1220	{	1297	{
1221	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1298	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");	1299	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1223		1300
1224	if (expect_false (next->flags & CF_RUNNING))	1301	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");	1302	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1226		1303
1227	if (expect_false (next->flags & CF_DESTROYED))	1304	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");	1305	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1229		1306
1230	#if !PERL_VERSION_ATLEAST (5,10,0)	1307	#if !PERL_VERSION_ATLEAST (5,10,0)
1231	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1308	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");	1309	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1233	#endif	1310	#endif
1234	}	1311	}
1235	}	1312	}
1236		1313
1237	/* always use the TRANSFER macro */	1314	/* always use the TRANSFER macro */
…		…
1241	dSTACKLEVEL;	1318	dSTACKLEVEL;
1242		1319
1243	/* sometimes transfer is only called to set idle_sp */	1320	/* sometimes transfer is only called to set idle_sp */
1244	if (expect_false (!next))	1321	if (expect_false (!next))
1245	{	1322	{
1246	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1323	((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 */	1324	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1248	}	1325	}
1249	else if (expect_true (prev != next))	1326	else if (expect_true (prev != next))
1250	{	1327	{
1251	static volatile int has_throw;
1252	coro_cctx *prev__cctx;	1328	coro_cctx *prev__cctx;
1253		1329
1254	if (expect_false (prev->flags & CF_NEW))	1330	if (expect_false (prev->flags & CF_NEW))
1255	{	1331	{
1256	/* create a new empty/source context */	1332	/* create a new empty/source context */
1257	++cctx_count;	1333	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;	1334	prev->flags &= ~CF_NEW;
1263	prev->flags |= CF_RUNNING;	1335	prev->flags |= CF_RUNNING;
1264	}	1336	}
1265		1337
1266	prev->flags &= ~CF_RUNNING;	1338	prev->flags &= ~CF_RUNNING;
1267	next->flags |= CF_RUNNING;	1339	next->flags |= CF_RUNNING;
1268
1269	LOCK;
1270		1340
1271	/* first get rid of the old state */	1341	/* first get rid of the old state */
1272	save_perl (aTHX_ prev);	1342	save_perl (aTHX_ prev);
1273		1343
1274	if (expect_false (next->flags & CF_NEW))	1344	if (expect_false (next->flags & CF_NEW))
…		…
1281	else	1351	else
1282	load_perl (aTHX_ next);	1352	load_perl (aTHX_ next);
1283		1353
1284	prev__cctx = prev->cctx;	1354	prev__cctx = prev->cctx;
1285		1355
1286	/* possibly "free" the cctx */	1356	/* possibly untie and reuse the cctx */
1287	if (expect_true (	1357	if (expect_true (
1288	prev__cctx->idle_sp == STACKLEVEL	1358	prev__cctx->idle_sp == (void *)stacklevel
1289	&& !(prev__cctx->flags & CC_TRACE)	1359	&& !(prev__cctx->flags & CC_TRACE)
1290	&& !force_cctx	1360	&& !force_cctx
1291	))	1361	))
1292	{	1362	{
1293	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1363	/* 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));	1364	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1295		1365
1296	prev->cctx = 0;	1366	prev->cctx = 0;
1297		1367
1298	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1368	/* 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 */	1369	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1307	++next->usecount;	1377	++next->usecount;
1308		1378
1309	if (expect_true (!next->cctx))	1379	if (expect_true (!next->cctx))
1310	next->cctx = cctx_get (aTHX);	1380	next->cctx = cctx_get (aTHX);
1311		1381
1312	has_throw = !!next->throw;	1382	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1383	transfer_next = next;
1313		1384
1314	if (expect_false (prev__cctx != next->cctx))	1385	if (expect_false (prev__cctx != next->cctx))
1315	{	1386	{
1316	prev__cctx->top_env = PL_top_env;	1387	prev__cctx->top_env = PL_top_env;
1317	PL_top_env = next->cctx->top_env;	1388	PL_top_env = next->cctx->top_env;
1318	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1389	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1319	}	1390	}
1320		1391
1321	free_coro_mortal (aTHX);	1392	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	}	1393	}
1337	}	1394	}
1338
1339	struct transfer_args
1340	{
1341	struct coro *prev, *next;
1342	};
1343		1395
1344	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1396	#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)	1397	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1346		1398
1347	/** high level stuff ********************************************************/	1399	/** high level stuff ********************************************************/
…		…
1349	static int	1401	static int
1350	coro_state_destroy (pTHX_ struct coro *coro)	1402	coro_state_destroy (pTHX_ struct coro *coro)
1351	{	1403	{
1352	if (coro->flags & CF_DESTROYED)	1404	if (coro->flags & CF_DESTROYED)
1353	return 0;	1405	return 0;
		1406
		1407	if (coro->on_destroy)
		1408	coro->on_destroy (aTHX_ coro);
1354		1409
1355	coro->flags |= CF_DESTROYED;	1410	coro->flags |= CF_DESTROYED;
1356		1411
1357	if (coro->flags & CF_READY)	1412	if (coro->flags & CF_READY)
1358	{	1413	{
1359	/* reduce nready, as destroying a ready coro effectively unreadies it */	1414	/* reduce nready, as destroying a ready coro effectively unreadies it */
1360	/* alternative: look through all ready queues and remove the coro */	1415	/* alternative: look through all ready queues and remove the coro */
1361	LOCK;
1362	--coro_nready;	1416	--coro_nready;
1363	UNLOCK;
1364	}	1417	}
1365	else	1418	else
1366	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1419	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1367		1420
1368	if (coro->mainstack && coro->mainstack != main_mainstack)	1421	if (coro->mainstack && coro->mainstack != main_mainstack)
1369	{	1422	{
1370	struct coro temp;	1423	struct coro temp;
1371		1424
1372	if (coro->flags & CF_RUNNING)	1425	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1373	croak ("FATAL: tried to destroy currently running coroutine");
1374		1426
1375	save_perl (aTHX_ &temp);	1427	save_perl (aTHX_ &temp);
1376	load_perl (aTHX_ coro);	1428	load_perl (aTHX_ coro);
1377		1429
1378	coro_destruct (aTHX_ coro);	1430	coro_destruct (aTHX_ coro);
…		…
1429	# define MGf_DUP 0	1481	# define MGf_DUP 0
1430	#endif	1482	#endif
1431	};	1483	};
1432		1484
1433	static void	1485	static void
1434	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1486	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1435	{	1487	{
1436	ta->prev = SvSTATE (prev_sv);	1488	ta->prev = SvSTATE (prev_sv);
1437	ta->next = SvSTATE (next_sv);	1489	ta->next = SvSTATE (next_sv);
1438	TRANSFER_CHECK (*ta);	1490	TRANSFER_CHECK (*ta);
1439	}	1491	}
1440		1492
1441	static void	1493	static void
1442	api_transfer (SV *prev_sv, SV *next_sv)	1494	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1443	{	1495	{
1444	dTHX;
1445	struct transfer_args ta;	1496	struct coro_transfer_args ta;
1446		1497
1447	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1498	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1448	TRANSFER (ta, 1);	1499	TRANSFER (ta, 1);
1449	}	1500	}
1450		1501
1451	/** Coro ********************************************************************/	1502	/** Coro ********************************************************************/
1452		1503
1453	static void	1504	INLINE void
1454	coro_enq (pTHX_ SV *coro_sv)	1505	coro_enq (pTHX_ struct coro *coro)
1455	{	1506	{
1456	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1507	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1457	}	1508	}
1458		1509
1459	static SV *	1510	INLINE SV *
1460	coro_deq (pTHX)	1511	coro_deq (pTHX)
1461	{	1512	{
1462	int prio;	1513	int prio;
1463		1514
1464	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1515	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1467		1518
1468	return 0;	1519	return 0;
1469	}	1520	}
1470		1521
1471	static int	1522	static int
1472	api_ready (SV *coro_sv)	1523	api_ready (pTHX_ SV *coro_sv)
1473	{	1524	{
1474	dTHX;
1475	struct coro *coro;	1525	struct coro *coro;
1476	SV *sv_hook;	1526	SV *sv_hook;
1477	void (*xs_hook)(void);	1527	void (*xs_hook)(void);
1478		1528
1479	if (SvROK (coro_sv))	1529	if (SvROK (coro_sv))
…		…
1484	if (coro->flags & CF_READY)	1534	if (coro->flags & CF_READY)
1485	return 0;	1535	return 0;
1486		1536
1487	coro->flags |= CF_READY;	1537	coro->flags |= CF_READY;
1488		1538
1489	LOCK;
1490
1491	sv_hook = coro_nready ? 0 : coro_readyhook;	1539	sv_hook = coro_nready ? 0 : coro_readyhook;
1492	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1540	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1493		1541
1494	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1542	coro_enq (aTHX_ coro);
1495	++coro_nready;	1543	++coro_nready;
1496		1544
1497	UNLOCK;
1498
1499	if (sv_hook)	1545	if (sv_hook)
1500	{	1546	{
1501	dSP;	1547	dSP;
1502		1548
1503	ENTER;	1549	ENTER;
…		…
1517		1563
1518	return 1;	1564	return 1;
1519	}	1565	}
1520		1566
1521	static int	1567	static int
1522	api_is_ready (SV *coro_sv)	1568	api_is_ready (pTHX_ SV *coro_sv)
1523	{	1569	{
1524	dTHX;
1525	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1570	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1526	}	1571	}
1527		1572
1528	static void	1573	INLINE void
1529	prepare_schedule (pTHX_ struct transfer_args *ta)	1574	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1530	{	1575	{
1531	SV *prev_sv, *next_sv;	1576	SV *prev_sv, *next_sv;
1532		1577
1533	for (;;)	1578	for (;;)
1534	{	1579	{
1535	LOCK;
1536	next_sv = coro_deq (aTHX);	1580	next_sv = coro_deq (aTHX);
1537		1581
1538	/* nothing to schedule: call the idle handler */	1582	/* nothing to schedule: call the idle handler */
1539	if (expect_false (!next_sv))	1583	if (expect_false (!next_sv))
1540	{	1584	{
1541	dSP;	1585	dSP;
1542	UNLOCK;
1543		1586
1544	ENTER;	1587	ENTER;
1545	SAVETMPS;	1588	SAVETMPS;
1546		1589
1547	PUSHMARK (SP);	1590	PUSHMARK (SP);
…		…
1552	FREETMPS;	1595	FREETMPS;
1553	LEAVE;	1596	LEAVE;
1554	continue;	1597	continue;
1555	}	1598	}
1556		1599
1557	ta->next = SvSTATE (next_sv);	1600	ta->next = SvSTATE_hv (next_sv);
1558		1601
1559	/* cannot transfer to destroyed coros, skip and look for next */	1602	/* cannot transfer to destroyed coros, skip and look for next */
1560	if (expect_false (ta->next->flags & CF_DESTROYED))	1603	if (expect_false (ta->next->flags & CF_DESTROYED))
1561	{	1604	{
1562	UNLOCK;
1563	SvREFCNT_dec (next_sv);	1605	SvREFCNT_dec (next_sv);
1564	/* coro_nready is already taken care of by destroy */	1606	/* coro_nready has already been taken care of by destroy */
1565	continue;	1607	continue;
1566	}	1608	}
1567		1609
1568	--coro_nready;	1610	--coro_nready;
1569	UNLOCK;
1570	break;	1611	break;
1571	}	1612	}
1572		1613
1573	/* free this only after the transfer */	1614	/* free this only after the transfer */
1574	prev_sv = SvRV (coro_current);	1615	prev_sv = SvRV (coro_current);
1575	ta->prev = SvSTATE (prev_sv);	1616	ta->prev = SvSTATE_hv (prev_sv);
1576	TRANSFER_CHECK (*ta);	1617	TRANSFER_CHECK (*ta);
1577	assert (ta->next->flags & CF_READY);	1618	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1578	ta->next->flags &= ~CF_READY;	1619	ta->next->flags &= ~CF_READY;
1579	SvRV_set (coro_current, next_sv);	1620	SvRV_set (coro_current, next_sv);
1580		1621
1581	LOCK;
1582	free_coro_mortal (aTHX);	1622	free_coro_mortal (aTHX);
1583	coro_mortal = prev_sv;	1623	coro_mortal = prev_sv;
1584	UNLOCK;
1585	}	1624	}
1586		1625
1587	static void	1626	INLINE void
1588	prepare_cede (pTHX_ struct transfer_args *ta)	1627	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1589	{	1628	{
1590	api_ready (coro_current);	1629	api_ready (aTHX_ coro_current);
1591	prepare_schedule (aTHX_ ta);	1630	prepare_schedule (aTHX_ ta);
1592	}	1631	}
1593		1632
		1633	INLINE void
		1634	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1635	{
		1636	SV *prev = SvRV (coro_current);
		1637
		1638	if (coro_nready)
		1639	{
		1640	prepare_schedule (aTHX_ ta);
		1641	api_ready (aTHX_ prev);
		1642	}
		1643	else
		1644	prepare_nop (aTHX_ ta);
		1645	}
		1646
		1647	static void
		1648	api_schedule (pTHX)
		1649	{
		1650	struct coro_transfer_args ta;
		1651
		1652	prepare_schedule (aTHX_ &ta);
		1653	TRANSFER (ta, 1);
		1654	}
		1655
1594	static int	1656	static int
1595	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1657	api_cede (pTHX)
1596	{	1658	{
1597	if (coro_nready)	1659	struct coro_transfer_args ta;
1598	{	1660
1599	SV *prev = SvRV (coro_current);
1600	prepare_schedule (aTHX_ ta);	1661	prepare_cede (aTHX_ &ta);
1601	api_ready (prev);	1662
		1663	if (expect_true (ta.prev != ta.next))
		1664	{
		1665	TRANSFER (ta, 1);
1602	return 1;	1666	return 1;
1603	}	1667	}
1604	else	1668	else
1605	return 0;	1669	return 0;
1606	}	1670	}
1607		1671
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	1672	static int
1619	api_cede (void)	1673	api_cede_notself (pTHX)
1620	{	1674	{
1621	dTHX;	1675	if (coro_nready)
		1676	{
1622	struct transfer_args ta;	1677	struct coro_transfer_args ta;
1623		1678
1624	prepare_cede (aTHX_ &ta);	1679	prepare_cede_notself (aTHX_ &ta);
1625
1626	if (expect_true (ta.prev != ta.next))
1627	{
1628	TRANSFER (ta, 1);	1680	TRANSFER (ta, 1);
1629	return 1;	1681	return 1;
1630	}	1682	}
1631	else	1683	else
1632	return 0;	1684	return 0;
1633	}	1685	}
1634		1686
1635	static int	1687	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)	1688	api_trace (pTHX_ SV *coro_sv, int flags)
1652	{	1689	{
1653	dTHX;
1654	struct coro *coro = SvSTATE (coro_sv);	1690	struct coro *coro = SvSTATE (coro_sv);
1655		1691
1656	if (flags & CC_TRACE)	1692	if (flags & CC_TRACE)
1657	{	1693	{
1658	if (!coro->cctx)	1694	if (!coro->cctx)
1659	coro->cctx = cctx_new ();	1695	coro->cctx = cctx_new_run ();
1660	else if (!(coro->cctx->flags & CC_TRACE))	1696	else if (!(coro->cctx->flags & CC_TRACE))
1661	croak ("cannot enable tracing on coroutine with custom stack");	1697	croak ("cannot enable tracing on coroutine with custom stack,");
1662		1698
1663	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1699	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1664	}	1700	}
1665	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1701	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1666	{	1702	{
…		…
1671	else	1707	else
1672	coro->slot->runops = RUNOPS_DEFAULT;	1708	coro->slot->runops = RUNOPS_DEFAULT;
1673	}	1709	}
1674	}	1710	}
1675		1711
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	/*****************************************************************************/	1712	/*****************************************************************************/
1695	/* PerlIO::cede */	1713	/* PerlIO::cede */
1696		1714
1697	typedef struct	1715	typedef struct
1698	{	1716	{
…		…
1725	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1743	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1726	double now = nvtime ();	1744	double now = nvtime ();
1727		1745
1728	if (now >= self->next)	1746	if (now >= self->next)
1729	{	1747	{
1730	api_cede ();	1748	api_cede (aTHX);
1731	self->next = now + self->every;	1749	self->next = now + self->every;
1732	}	1750	}
1733		1751
1734	return PerlIOBuf_flush (aTHX_ f);	1752	return PerlIOBuf_flush (aTHX_ f);
1735	}	1753	}
…		…
1764	PerlIOBuf_get_ptr,	1782	PerlIOBuf_get_ptr,
1765	PerlIOBuf_get_cnt,	1783	PerlIOBuf_get_cnt,
1766	PerlIOBuf_set_ptrcnt,	1784	PerlIOBuf_set_ptrcnt,
1767	};	1785	};
1768		1786
		1787	/*****************************************************************************/
		1788
		1789	static const CV *slf_cv; /* for quick consistency check */
		1790
		1791	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1792	static SV *slf_arg0;
		1793	static SV *slf_arg1;
		1794	static SV *slf_arg2;
		1795
		1796	/* this restores the stack in the case we patched the entersub, to */
		1797	/* recreate the stack frame as perl will on following calls */
		1798	/* since entersub cleared the stack */
		1799	static OP *
		1800	pp_restore (pTHX)
		1801	{
		1802	dSP;
		1803
		1804	PUSHMARK (SP);
		1805
		1806	EXTEND (SP, 3);
		1807	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1808	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1809	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1810	PUSHs ((SV *)CvGV (slf_cv));
		1811
		1812	RETURNOP (slf_restore.op_first);
		1813	}
		1814
		1815	static void
		1816	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1817	{
		1818	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1819	}
		1820
		1821	static void
		1822	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1823	{
		1824	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1825
		1826	frame->prepare = slf_prepare_set_stacklevel;
		1827	frame->check = slf_check_nop;
		1828	frame->data = (void *)SvIV (arg [0]);
		1829	}
		1830
		1831	static void
		1832	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1833	{
		1834	SV **arg = (SV **)slf_frame.data;
		1835
		1836	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1837	}
		1838
		1839	static void
		1840	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1841	{
		1842	if (items != 2)
		1843	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1844
		1845	frame->prepare = slf_prepare_transfer;
		1846	frame->check = slf_check_nop;
		1847	frame->data = (void *)arg; /* let's hope it will stay valid */
		1848	}
		1849
		1850	static void
		1851	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1852	{
		1853	frame->prepare = prepare_schedule;
		1854	frame->check = slf_check_nop;
		1855	}
		1856
		1857	static void
		1858	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1859	{
		1860	frame->prepare = prepare_cede;
		1861	frame->check = slf_check_nop;
		1862	}
		1863
		1864	static void
		1865	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1866	{
		1867	frame->prepare = prepare_cede_notself;
		1868	frame->check = slf_check_nop;
		1869	}
		1870
		1871	/* we hijack an hopefully unused CV flag for our purposes */
		1872	#define CVf_SLF 0x4000
		1873
		1874	/*
		1875	* these not obviously related functions are all rolled into one
		1876	* function to increase chances that they all will call transfer with the same
		1877	* stack offset
		1878	* SLF stands for "schedule-like-function".
		1879	*/
		1880	static OP *
		1881	pp_slf (pTHX)
		1882	{
		1883	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1884
		1885	/* set up the slf frame, unless it has already been set-up */
		1886	/* the latter happens when a new coro has been started */
		1887	/* or when a new cctx was attached to an existing coroutine */
		1888	if (expect_true (!slf_frame.prepare))
		1889	{
		1890	/* first iteration */
		1891	dSP;
		1892	SV **arg = PL_stack_base + TOPMARK + 1;
		1893	int items = SP - arg; /* args without function object */
		1894	SV *gv = *sp;
		1895
		1896	/* do a quick consistency check on the "function" object, and if it isn't */
		1897	/* for us, divert to the real entersub */
		1898	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1899	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1900
		1901	/* pop args */
		1902	SP = PL_stack_base + POPMARK;
		1903
		1904	if (!(PL_op->op_flags & OPf_STACKED))
		1905	{
		1906	/* ampersand-form of call, use @_ instead of stack */
		1907	AV *av = GvAV (PL_defgv);
		1908	arg = AvARRAY (av);
		1909	items = AvFILLp (av) + 1;
		1910	}
		1911
		1912	PUTBACK;
		1913
		1914	/* now call the init function, which needs to set up slf_frame */
		1915	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1916	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1917	}
		1918
		1919	/* now that we have a slf_frame, interpret it! */
		1920	/* we use a callback system not to make the code needlessly */
		1921	/* complicated, but so we can run multiple perl coros from one cctx */
		1922
		1923	do
		1924	{
		1925	struct coro_transfer_args ta;
		1926
		1927	slf_frame.prepare (aTHX_ &ta);
		1928	TRANSFER (ta, 0);
		1929
		1930	checkmark = PL_stack_sp - PL_stack_base;
		1931	}
		1932	while (slf_frame.check (aTHX_ &slf_frame));
		1933
		1934	{
		1935	dSP;
		1936	SV **bot = PL_stack_base + checkmark;
		1937	int gimme = GIMME_V;
		1938
		1939	slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
		1940
		1941	/* make sure we put something on the stack in scalar context */
		1942	if (gimme == G_SCALAR)
		1943	{
		1944	if (sp == bot)
		1945	XPUSHs (&PL_sv_undef);
		1946
		1947	SP = bot + 1;
		1948	}
		1949
		1950	PUTBACK;
		1951	}
		1952
		1953	return NORMAL;
		1954	}
		1955
		1956	static void
		1957	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
		1958	{
		1959	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1960
		1961	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1962	&& PL_op->op_ppaddr != pp_slf)
		1963	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1964
		1965	if (items > 3)
		1966	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
		1967
		1968	CvFLAGS (cv) |= CVf_SLF;
		1969	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1970	slf_cv = cv;
		1971
		1972	/* we patch the op, and then re-run the whole call */
		1973	/* we have to put the same argument on the stack for this to work */
		1974	/* and this will be done by pp_restore */
		1975	slf_restore.op_next = (OP *)&slf_restore;
		1976	slf_restore.op_type = OP_CUSTOM;
		1977	slf_restore.op_ppaddr = pp_restore;
		1978	slf_restore.op_first = PL_op;
		1979
		1980	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		1981	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		1982	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
		1983
		1984	PL_op->op_ppaddr = pp_slf;
		1985
		1986	PL_op = (OP *)&slf_restore;
		1987	}
		1988
		1989	/*****************************************************************************/
		1990
		1991	static void
		1992	coro_semaphore_adjust (pTHX_ AV *av, int adjust)
		1993	{
		1994	SV *count_sv = AvARRAY (av)[0];
		1995	IV count = SvIVX (count_sv);
		1996
		1997	count += adjust;
		1998	SvIVX (count_sv) = count;
		1999
		2000	/* now wake up as many waiters as possible */
		2001	while (count > 0 && AvFILLp (av) >= count)
		2002	{
		2003	SV *cb;
		2004
		2005	/* swap first two elements so we can shift a waiter */
		2006	AvARRAY (av)[0] = AvARRAY (av)[1];
		2007	AvARRAY (av)[1] = count_sv;
		2008	cb = av_shift (av);
		2009
		2010	if (SvOBJECT (cb))
		2011	api_ready (aTHX_ cb);
		2012	else
		2013	croak ("callbacks not yet supported");
		2014
		2015	SvREFCNT_dec (cb);
		2016
		2017	--count;
		2018	}
		2019	}
		2020
		2021	static void
		2022	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2023	{
		2024	/* call $sem->adjust (0) to possibly wake up some waiters */
		2025	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2026	}
		2027
		2028	static int
		2029	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2030	{
		2031	AV *av = (AV *)frame->data;
		2032	SV *count_sv = AvARRAY (av)[0];
		2033
		2034	if (SvIVX (count_sv) > 0)
		2035	{
		2036	SvSTATE_current->on_destroy = 0;
		2037	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2038	return 0;
		2039	}
		2040	else
		2041	{
		2042	int i;
		2043	/* if we were woken up but can't down, we look through the whole */
		2044	/* waiters list and only add us if we aren't in there already */
		2045	/* this avoids some degenerate memory usage cases */
		2046
		2047	for (i = 1; i <= AvFILLp (av); ++i)
		2048	if (AvARRAY (av)[i] == SvRV (coro_current))
		2049	return 1;
		2050
		2051	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2052	return 1;
		2053	}
		2054	}
		2055
		2056	static void
		2057	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2058	{
		2059	AV *av = (AV *)SvRV (arg [0]);
		2060
		2061	if (SvIVX (AvARRAY (av)[0]) > 0)
		2062	{
		2063	frame->data = (void *)av;
		2064	frame->prepare = prepare_nop;
		2065	}
		2066	else
		2067	{
		2068	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2069
		2070	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2071	frame->prepare = prepare_schedule;
		2072
		2073	/* to avoid race conditions when a woken-up coro gets terminated */
		2074	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2075	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2076	}
		2077
		2078	frame->check = slf_check_semaphore_down;
		2079
		2080	}
		2081
		2082	/*****************************************************************************/
		2083
		2084	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2085
		2086	/* create a closure from XS, returns a code reference */
		2087	/* the arg can be accessed via GENSUB_ARG from the callback */
		2088	/* the callback must use dXSARGS/XSRETURN */
		2089	static SV *
		2090	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2091	{
		2092	CV *cv = (CV *)NEWSV (0, 0);
		2093
		2094	sv_upgrade ((SV *)cv, SVt_PVCV);
		2095
		2096	CvANON_on (cv);
		2097	CvISXSUB_on (cv);
		2098	CvXSUB (cv) = xsub;
		2099	GENSUB_ARG = arg;
		2100
		2101	return newRV_noinc ((SV *)cv);
		2102	}
		2103
		2104	/*****************************************************************************/
1769		2105
1770	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2106	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1771		2107
1772	PROTOTYPES: DISABLE	2108	PROTOTYPES: DISABLE
1773		2109
1774	BOOT:	2110	BOOT:
1775	{	2111	{
1776	#ifdef USE_ITHREADS	2112	#ifdef USE_ITHREADS
1777	MUTEX_INIT (&coro_lock);
1778	# if CORO_PTHREAD	2113	# if CORO_PTHREAD
1779	coro_thx = PERL_GET_CONTEXT;	2114	coro_thx = PERL_GET_CONTEXT;
1780	# endif	2115	# endif
1781	#endif	2116	#endif
1782	BOOT_PAGESIZE;	2117	BOOT_PAGESIZE;
…		…
1803	main_top_env = PL_top_env;	2138	main_top_env = PL_top_env;
1804		2139
1805	while (main_top_env->je_prev)	2140	while (main_top_env->je_prev)
1806	main_top_env = main_top_env->je_prev;	2141	main_top_env = main_top_env->je_prev;
1807		2142
		2143	{
		2144	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2145
		2146	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2147	hv_store_ent (PL_custom_op_names, slf,
		2148	newSVpv ("coro_slf", 0), 0);
		2149
		2150	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2151	hv_store_ent (PL_custom_op_descs, slf,
		2152	newSVpv ("coro schedule like function", 0), 0);
		2153	}
		2154
1808	coroapi.ver = CORO_API_VERSION;	2155	coroapi.ver = CORO_API_VERSION;
1809	coroapi.rev = CORO_API_REVISION;	2156	coroapi.rev = CORO_API_REVISION;
		2157
1810	coroapi.transfer = api_transfer;	2158	coroapi.transfer = api_transfer;
		2159
		2160	coroapi.sv_state = SvSTATE_;
		2161	coroapi.execute_slf = api_execute_slf;
		2162	coroapi.prepare_nop = prepare_nop;
		2163	coroapi.prepare_schedule = prepare_schedule;
		2164	coroapi.prepare_cede = prepare_cede;
		2165	coroapi.prepare_cede_notself = prepare_cede_notself;
1811		2166
1812	{	2167	{
1813	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2168	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1814		2169
1815	if (!svp) croak ("Time::HiRes is required");	2170	if (!svp) croak ("Time::HiRes is required");
…		…
1848	av_push (coro->args, newSVsv (ST (i)));	2203	av_push (coro->args, newSVsv (ST (i)));
1849	}	2204	}
1850	OUTPUT:	2205	OUTPUT:
1851	RETVAL	2206	RETVAL
1852		2207
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	2208	void
1857	_set_stacklevel (...)	2209	_set_stacklevel (...)
1858	ALIAS:	2210	CODE:
1859	Coro::State::transfer = 1	2211	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		2212
1867	PUTBACK;	2213	void
1868	switch (ix)	2214	transfer (...)
1869	{	2215	PROTOTYPE: $$
1870	case 0:	2216	CODE:
1871	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	2217	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		2218
1905	bool	2219	bool
1906	_destroy (SV *coro_sv)	2220	_destroy (SV *coro_sv)
1907	CODE:	2221	CODE:
1908	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2222	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1915	CODE:	2229	CODE:
1916	_exit (code);	2230	_exit (code);
1917		2231
1918	int	2232	int
1919	cctx_stacksize (int new_stacksize = 0)	2233	cctx_stacksize (int new_stacksize = 0)
		2234	PROTOTYPE: ;$
1920	CODE:	2235	CODE:
1921	RETVAL = cctx_stacksize;	2236	RETVAL = cctx_stacksize;
1922	if (new_stacksize)	2237	if (new_stacksize)
1923	{	2238	{
1924	cctx_stacksize = new_stacksize;	2239	cctx_stacksize = new_stacksize;
…		…
1927	OUTPUT:	2242	OUTPUT:
1928	RETVAL	2243	RETVAL
1929		2244
1930	int	2245	int
1931	cctx_max_idle (int max_idle = 0)	2246	cctx_max_idle (int max_idle = 0)
		2247	PROTOTYPE: ;$
1932	CODE:	2248	CODE:
1933	RETVAL = cctx_max_idle;	2249	RETVAL = cctx_max_idle;
1934	if (max_idle > 1)	2250	if (max_idle > 1)
1935	cctx_max_idle = max_idle;	2251	cctx_max_idle = max_idle;
1936	OUTPUT:	2252	OUTPUT:
1937	RETVAL	2253	RETVAL
1938		2254
1939	int	2255	int
1940	cctx_count ()	2256	cctx_count ()
		2257	PROTOTYPE:
1941	CODE:	2258	CODE:
1942	RETVAL = cctx_count;	2259	RETVAL = cctx_count;
1943	OUTPUT:	2260	OUTPUT:
1944	RETVAL	2261	RETVAL
1945		2262
1946	int	2263	int
1947	cctx_idle ()	2264	cctx_idle ()
		2265	PROTOTYPE:
1948	CODE:	2266	CODE:
1949	RETVAL = cctx_idle;	2267	RETVAL = cctx_idle;
1950	OUTPUT:	2268	OUTPUT:
1951	RETVAL	2269	RETVAL
1952		2270
1953	void	2271	void
1954	list ()	2272	list ()
		2273	PROTOTYPE:
1955	PPCODE:	2274	PPCODE:
1956	{	2275	{
1957	struct coro *coro;	2276	struct coro *coro;
1958	for (coro = coro_first; coro; coro = coro->next)	2277	for (coro = coro_first; coro; coro = coro->next)
1959	if (coro->hv)	2278	if (coro->hv)
…		…
2018	RETVAL = boolSV (coro->flags & ix);	2337	RETVAL = boolSV (coro->flags & ix);
2019	OUTPUT:	2338	OUTPUT:
2020	RETVAL	2339	RETVAL
2021		2340
2022	void	2341	void
		2342	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2343	PROTOTYPE: $;$
		2344	CODE:
		2345	SvREFCNT_dec (self->throw);
		2346	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2347
		2348	void
2023	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2349	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2350	PROTOTYPE: $;$
		2351	C_ARGS: aTHX_ coro, flags
2024		2352
2025	SV *	2353	SV *
2026	has_cctx (Coro::State coro)	2354	has_cctx (Coro::State coro)
2027	PROTOTYPE: $	2355	PROTOTYPE: $
2028	CODE:	2356	CODE:
…		…
2052	OUTPUT:	2380	OUTPUT:
2053	RETVAL	2381	RETVAL
2054		2382
2055	void	2383	void
2056	force_cctx ()	2384	force_cctx ()
		2385	PROTOTYPE:
2057	CODE:	2386	CODE:
2058	struct coro *coro = SvSTATE (coro_current);
2059	coro->cctx->idle_sp = 0;	2387	SvSTATE_current->cctx->idle_sp = 0;
2060		2388
2061	void	2389	void
2062	swap_defsv (Coro::State self)	2390	swap_defsv (Coro::State self)
2063	PROTOTYPE: $	2391	PROTOTYPE: $
2064	ALIAS:	2392	ALIAS:
2065	swap_defav = 1	2393	swap_defav = 1
2066	CODE:	2394	CODE:
2067	if (!self->slot)	2395	if (!self->slot)
2068	croak ("cannot swap state with coroutine that has no saved state");	2396	croak ("cannot swap state with coroutine that has no saved state,");
2069	else	2397	else
2070	{	2398	{
2071	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2399	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2072	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2400	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2073		2401
…		…
2098		2426
2099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2427	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2100	coro_ready[i] = newAV ();	2428	coro_ready[i] = newAV ();
2101		2429
2102	{	2430	{
2103	SV *sv = perl_get_sv ("Coro::API", TRUE);	2431	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2104	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2105		2432
2106	coroapi.schedule = api_schedule;	2433	coroapi.schedule = api_schedule;
2107	coroapi.cede = api_cede;	2434	coroapi.cede = api_cede;
2108	coroapi.cede_notself = api_cede_notself;	2435	coroapi.cede_notself = api_cede_notself;
2109	coroapi.ready = api_ready;	2436	coroapi.ready = api_ready;
2110	coroapi.is_ready = api_is_ready;	2437	coroapi.is_ready = api_is_ready;
2111	coroapi.nready = &coro_nready;	2438	coroapi.nready = coro_nready;
2112	coroapi.current = coro_current;	2439	coroapi.current = coro_current;
2113		2440
2114	GCoroAPI = &coroapi;	2441	GCoroAPI = &coroapi;
2115	sv_setiv (sv, (IV)&coroapi);	2442	sv_setiv (sv, (IV)&coroapi);
2116	SvREADONLY_on (sv);	2443	SvREADONLY_on (sv);
2117	}	2444	}
2118	}	2445	}
		2446
		2447	void
		2448	schedule (...)
		2449	CODE:
		2450	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
		2451
		2452	void
		2453	cede (...)
		2454	CODE:
		2455	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
		2456
		2457	void
		2458	cede_notself (...)
		2459	CODE:
		2460	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2119		2461
2120	void	2462	void
2121	_set_current (SV *current)	2463	_set_current (SV *current)
2122	PROTOTYPE: $	2464	PROTOTYPE: $
2123	CODE:	2465	CODE:
…		…
2126		2468
2127	void	2469	void
2128	_set_readyhook (SV *hook)	2470	_set_readyhook (SV *hook)
2129	PROTOTYPE: $	2471	PROTOTYPE: $
2130	CODE:	2472	CODE:
2131	LOCK;
2132	SvREFCNT_dec (coro_readyhook);	2473	SvREFCNT_dec (coro_readyhook);
2133	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2474	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2134	UNLOCK;
2135		2475
2136	int	2476	int
2137	prio (Coro::State coro, int newprio = 0)	2477	prio (Coro::State coro, int newprio = 0)
		2478	PROTOTYPE: $;$
2138	ALIAS:	2479	ALIAS:
2139	nice = 1	2480	nice = 1
2140	CODE:	2481	CODE:
2141	{	2482	{
2142	RETVAL = coro->prio;	2483	RETVAL = coro->prio;
…		…
2157		2498
2158	SV *	2499	SV *
2159	ready (SV *self)	2500	ready (SV *self)
2160	PROTOTYPE: $	2501	PROTOTYPE: $
2161	CODE:	2502	CODE:
2162	RETVAL = boolSV (api_ready (self));	2503	RETVAL = boolSV (api_ready (aTHX_ self));
2163	OUTPUT:	2504	OUTPUT:
2164	RETVAL	2505	RETVAL
2165		2506
2166	int	2507	int
2167	nready (...)	2508	nready (...)
…		…
2169	CODE:	2510	CODE:
2170	RETVAL = coro_nready;	2511	RETVAL = coro_nready;
2171	OUTPUT:	2512	OUTPUT:
2172	RETVAL	2513	RETVAL
2173		2514
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	2515	# for async_pool speedup
2182	void	2516	void
2183	_pool_1 (SV *cb)	2517	_pool_1 (SV *cb)
2184	CODE:	2518	CODE:
2185	{	2519	{
2186	struct coro *coro = SvSTATE (coro_current);
2187	HV *hv = (HV *)SvRV (coro_current);	2520	HV *hv = (HV *)SvRV (coro_current);
		2521	struct coro *coro = SvSTATE_hv ((SV *)hv);
2188	AV *defav = GvAV (PL_defgv);	2522	AV *defav = GvAV (PL_defgv);
2189	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2523	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2190	AV *invoke_av;	2524	AV *invoke_av;
2191	int i, len;	2525	int i, len;
2192		2526
…		…
2213	{	2547	{
2214	av_fill (defav, len - 1);	2548	av_fill (defav, len - 1);
2215	for (i = 0; i < len; ++i)	2549	for (i = 0; i < len; ++i)
2216	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2550	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2217	}	2551	}
2218
2219	SvREFCNT_dec (invoke);
2220	}	2552	}
2221		2553
2222	void	2554	void
2223	_pool_2 (SV *cb)	2555	_pool_2 (SV *cb)
2224	CODE:	2556	CODE:
2225	{	2557	{
2226	struct coro *coro = SvSTATE (coro_current);	2558	struct coro *coro = SvSTATE_current;
2227		2559
2228	sv_setsv (cb, &PL_sv_undef);	2560	sv_setsv (cb, &PL_sv_undef);
2229		2561
2230	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2562	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2231	coro->saved_deffh = 0;	2563	coro->saved_deffh = 0;
…		…
2244	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2576	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2245		2577
2246	coro->prio = 0;	2578	coro->prio = 0;
2247		2579
2248	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2580	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2249	api_trace (coro_current, 0);	2581	api_trace (aTHX_ coro_current, 0);
2250		2582
2251	av_push (av_async_pool, newSVsv (coro_current));	2583	av_push (av_async_pool, newSVsv (coro_current));
2252	}	2584	}
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		2585
2302		2586
2303	MODULE = Coro::State PACKAGE = Coro::AIO	2587	MODULE = Coro::State PACKAGE = Coro::AIO
2304		2588
2305	void	2589	void
2306	_get_state (SV *self)	2590	_get_state (SV *self)
		2591	PROTOTYPE: $
2307	PPCODE:	2592	PPCODE:
2308	{	2593	{
2309	AV *defav = GvAV (PL_defgv);	2594	AV *defav = GvAV (PL_defgv);
2310	AV *av = newAV ();	2595	AV *av = newAV ();
2311	int i;	2596	int i;
…		…
2326		2611
2327	av_push (av, data_sv);	2612	av_push (av, data_sv);
2328		2613
2329	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));	2614	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2330		2615
2331	api_ready (self);	2616	api_ready (aTHX_ self);
2332	}	2617	}
2333		2618
2334	void	2619	void
2335	_set_state (SV *state)	2620	_set_state (SV *state)
2336	PROTOTYPE: $	2621	PROTOTYPE: $
…		…
2354	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2639	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2355		2640
2356	BOOT:	2641	BOOT:
2357	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2642	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2358		2643
2359	SV *	2644	void
2360	_schedule (...)	2645	_schedule (...)
2361	PROTOTYPE: @
2362	CODE:	2646	CODE:
2363	{	2647	{
2364	static int incede;	2648	static int incede;
2365		2649
2366	api_cede_notself ();	2650	api_cede_notself (aTHX);
2367		2651
2368	++incede;	2652	++incede;
2369	while (coro_nready >= incede && api_cede ())	2653	while (coro_nready >= incede && api_cede (aTHX))
2370	;	2654	;
2371		2655
2372	sv_setsv (sv_activity, &PL_sv_undef);	2656	sv_setsv (sv_activity, &PL_sv_undef);
2373	if (coro_nready >= incede)	2657	if (coro_nready >= incede)
2374	{	2658	{
…		…
2384		2668
2385	MODULE = Coro::State PACKAGE = PerlIO::cede	2669	MODULE = Coro::State PACKAGE = PerlIO::cede
2386		2670
2387	BOOT:	2671	BOOT:
2388	PerlIO_define_layer (aTHX_ &PerlIO_cede);	2672	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2673
		2674	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2675
		2676	SV *
		2677	new (SV *klass, SV *count_ = 0)
		2678	CODE:
		2679	{
		2680	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2681	AV *av = newAV ();
		2682	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2683	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2684	}
		2685	OUTPUT:
		2686	RETVAL
		2687
		2688	SV *
		2689	count (SV *self)
		2690	CODE:
		2691	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2692	OUTPUT:
		2693	RETVAL
		2694
		2695	void
		2696	up (SV *self, int adjust = 1)
		2697	ALIAS:
		2698	adjust = 1
		2699	CODE:
		2700	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
		2701
		2702	void
		2703	down (SV *self)
		2704	CODE:
		2705	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
		2706
		2707	void
		2708	try (SV *self)
		2709	PPCODE:
		2710	{
		2711	AV *av = (AV *)SvRV (self);
		2712	SV *count_sv = AvARRAY (av)[0];
		2713	IV count = SvIVX (count_sv);
		2714
		2715	if (count > 0)
		2716	{
		2717	--count;
		2718	SvIVX (count_sv) = count;
		2719	XSRETURN_YES;
		2720	}
		2721	else
		2722	XSRETURN_NO;
		2723	}
		2724
		2725	void
		2726	waiters (SV *self)
		2727	CODE:
		2728	{
		2729	AV *av = (AV *)SvRV (self);
		2730
		2731	if (GIMME_V == G_SCALAR)
		2732	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2733	else
		2734	{
		2735	int i;
		2736	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2737	for (i = 1; i <= AvFILLp (av); ++i)
		2738	PUSHs (newSVsv (AvARRAY (av)[i]));
		2739	}
		2740	}
		2741

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