[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.258 by root, Sun Nov 9 23:08:49 2008 UTC vs.
Revision 1.301 by root, Wed Nov 19 02:41:31 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
…		…
98	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
99	#endif	96	#endif
100	#ifndef newSV	97	#ifndef newSV
101	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
102	#endif	99	#endif
		100	#ifndef CvISXSUB_on
		101	# define CvISXSUB_on(cv) (void)cv
		102	#endif
103		103
104	/* 5.8.7 */	104	/* 5.8.7 */
105	#ifndef SvRV_set	105	#ifndef SvRV_set
106	# define SvRV_set(s,v) SvRV(s) = (v)	106	# define SvRV_set(s,v) SvRV(s) = (v)
107	#endif	107	#endif
…		…
119	# define CORO_PREFER_PERL_FUNCTIONS 0	119	# define CORO_PREFER_PERL_FUNCTIONS 0
120	#endif	120	#endif
121		121
122	/* The next macros try to return the current stack pointer, in an as	122	/* The next macros try to return the current stack pointer, in an as
123	* portable way as possible. */	123	* portable way as possible. */
		124	#if __GNUC__ >= 4
		125	# define dSTACKLEVEL int stacklevel_dummy
		126	# define STACKLEVEL __builtin_frame_address (0)
		127	#else
124	#define dSTACKLEVEL volatile char stacklevel	128	# define dSTACKLEVEL volatile void *stacklevel
125	#define STACKLEVEL ((void *)&stacklevel)	129	# define STACKLEVEL ((void *)&stacklevel)
		130	#endif
126		131
127	#define IN_DESTRUCT (PL_main_cv == Nullcv)	132	#define IN_DESTRUCT (PL_main_cv == Nullcv)
128		133
129	#if __GNUC__ >= 3	134	#if __GNUC__ >= 3
130	# define attribute(x) __attribute__(x)	135	# define attribute(x) __attribute__(x)
131	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132	# define expect(expr,value) __builtin_expect ((expr),(value))	136	# define expect(expr,value) __builtin_expect ((expr),(value))
		137	# define INLINE static inline
133	#else	138	#else
134	# define attribute(x)	139	# define attribute(x)
135	# define BARRIER
136	# define expect(expr,value) (expr)	140	# define expect(expr,value) (expr)
		141	# define INLINE static
137	#endif	142	#endif
138		143
139	#define expect_false(expr) expect ((expr) != 0, 0)	144	#define expect_false(expr) expect ((expr) != 0, 0)
140	#define expect_true(expr) expect ((expr) != 0, 1)	145	#define expect_true(expr) expect ((expr) != 0, 1)
141		146
142	#define NOINLINE attribute ((noinline))	147	#define NOINLINE attribute ((noinline))
143		148
144	#include "CoroAPI.h"	149	#include "CoroAPI.h"
		150	#define GCoroAPI (&coroapi) /* very sneaky */
145		151
146	#ifdef USE_ITHREADS	152	#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	153	# if CORO_PTHREAD
152	static void *coro_thx;	154	static void *coro_thx;
153	# endif	155	# endif
154
155	#else
156
157	# define LOCK (void)0
158	# define UNLOCK (void)0
159
160	#endif	156	#endif
161
162	# undef LOCK
163	# define LOCK (void)0
164	# undef UNLOCK
165	# define UNLOCK (void)0
166
167	/* helper storage struct for Coro::AIO */
168	struct io_state
169	{
170	AV *res;
171	int errorno;
172	I32 laststype; /* U16 in 5.10.0 */
173	int laststatval;
174	Stat_t statcache;
175	};
176		157
177	static double (nvtime)(); / so why doesn't it take void? */	158	static double (nvtime)(); / so why doesn't it take void? */
		159
		160	/* we hijack an hopefully unused CV flag for our purposes */
		161	#define CVf_SLF 0x4000
		162	static OP *pp_slf (pTHX);
178		163
179	static U32 cctx_gen;	164	static U32 cctx_gen;
180	static size_t cctx_stacksize = CORO_STACKSIZE;	165	static size_t cctx_stacksize = CORO_STACKSIZE;
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 */
…		…
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	/* state 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 */
272	int prio;	261	int prio;
273	SV throw; / exception to be thrown */	262	SV except; / exception to be thrown */
274		263
275	/* async_pool */	264	/* async_pool */
276	SV *saved_deffh;	265	SV *saved_deffh;
277		266
278	/* linked list */	267	/* linked list */
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	/* the following variables are effectively part of the perl context */
		275	/* and get copied between struct coro and these variables */
		276	/* the mainr easonw e don't support windows process emulation */
		277	static struct CoroSLF slf_frame; /* the current slf frame */
284		278
285	/ Coro ******************************************************************/	279	/ Coro ******************************************************************/
286		280
287	#define PRIO_MAX 3	281	#define PRIO_MAX 3
288	#define PRIO_HIGH 1	282	#define PRIO_HIGH 1
…		…
293		287
294	/* for Coro.pm */	288	/* for Coro.pm */
295	static SV *coro_current;	289	static SV *coro_current;
296	static SV *coro_readyhook;	290	static SV *coro_readyhook;
297	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];	291	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
298	static int coro_nready;
299	static struct coro *coro_first;	292	static struct coro *coro_first;
		293	#define coro_nready coroapi.nready
300		294
301	/ lowlevel stuff ********************************************************/	295	/ lowlevel stuff ********************************************************/
302		296
303	static SV *	297	static SV *
304	coro_get_sv (pTHX_ const char *name, int create)	298	coro_get_sv (pTHX_ const char *name, int create)
…		…
389	SvREFCNT_dec (av); /* sv_magicext increased the refcount */	383	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
390		384
391	return 0;	385	return 0;
392	}	386	}
393		387
394	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	388	#define CORO_MAGIC_type_cv 26
395	#define CORO_MAGIC_type_state PERL_MAGIC_ext	389	#define CORO_MAGIC_type_state PERL_MAGIC_ext
396		390
397	static MGVTBL coro_cv_vtbl = {	391	static MGVTBL coro_cv_vtbl = {
398	0, 0, 0, 0,	392	0, 0, 0, 0,
399	coro_cv_free	393	coro_cv_free
400	};	394	};
401		395
		396	#define CORO_MAGIC_NN(sv, type) \
		397	(expect_true (SvMAGIC (sv)->mg_type == type) \
		398	? SvMAGIC (sv) \
		399	: mg_find (sv, type))
		400
402	#define CORO_MAGIC(sv, type) \	401	#define CORO_MAGIC(sv, type) \
403	SvMAGIC (sv) \	402	(expect_true (SvMAGIC (sv)) \
404	? SvMAGIC (sv)->mg_type == type \	403	? CORO_MAGIC_NN (sv, type) \
405	? SvMAGIC (sv) \
406	: mg_find (sv, type) \
407	: 0	404	: 0)
408		405
409	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	406	#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)	407	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
411		408
412	static struct coro *	409	INLINE struct coro *
413	SvSTATE_ (pTHX_ SV *coro)	410	SvSTATE_ (pTHX_ SV *coro)
414	{	411	{
415	HV *stash;	412	HV *stash;
416	MAGIC *mg;	413	MAGIC *mg;
417		414
…		…
432	mg = CORO_MAGIC_state (coro);	429	mg = CORO_MAGIC_state (coro);
433	return (struct coro *)mg->mg_ptr;	430	return (struct coro *)mg->mg_ptr;
434	}	431	}
435		432
436	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	433	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		434
		435	/* faster than SvSTATE, but expects a coroutine hv */
		436	#define SvSTATE_hv(hv) ((struct coro )CORO_MAGIC_NN ((SV )hv, CORO_MAGIC_type_state)->mg_ptr)
		437	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
437		438
438	/* the next two functions merely cache the padlists */	439	/* the next two functions merely cache the padlists */
439	static void	440	static void
440	get_padlist (pTHX_ CV *cv)	441	get_padlist (pTHX_ CV *cv)
441	{	442	{
…		…
508	CvPADLIST (cv) = (AV *)POPs;	509	CvPADLIST (cv) = (AV *)POPs;
509	}	510	}
510		511
511	PUTBACK;	512	PUTBACK;
512	}	513	}
		514
		515	slf_frame = c->slf_frame;
		516	CORO_THROW = c->except;
513	}	517	}
514		518
515	static void	519	static void
516	save_perl (pTHX_ Coro__State c)	520	save_perl (pTHX_ Coro__State c)
517	{	521	{
		522	c->except = CORO_THROW;
		523	c->slf_frame = slf_frame;
		524
518	{	525	{
519	dSP;	526	dSP;
520	I32 cxix = cxstack_ix;	527	I32 cxix = cxstack_ix;
521	PERL_CONTEXT *ccstk = cxstack;	528	PERL_CONTEXT *ccstk = cxstack;
522	PERL_SI *top_si = PL_curstackinfo;	529	PERL_SI *top_si = PL_curstackinfo;
…		…
589	#undef VAR	596	#undef VAR
590	}	597	}
591	}	598	}
592		599
593	/*	600	/*
594	* allocate various perl stacks. This is an exact copy	601	* allocate various perl stacks. This is almost an exact copy
595	* of perl.c:init_stacks, except that it uses less memory	602	* of perl.c:init_stacks, except that it uses less memory
596	* on the (sometimes correct) assumption that coroutines do	603	* on the (sometimes correct) assumption that coroutines do
597	* not usually need a lot of stackspace.	604	* not usually need a lot of stackspace.
598	*/	605	*/
599	#if CORO_PREFER_PERL_FUNCTIONS	606	#if CORO_PREFER_PERL_FUNCTIONS
…		…
801		808
802	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	809	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
803	}	810	}
804		811
805	static void	812	static void
		813	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		814	{
		815	/* kind of mega-hacky, but works */
		816	ta->next = ta->prev = (struct coro *)ta;
		817	}
		818
		819	static int
		820	slf_check_nop (pTHX_ struct CoroSLF *frame)
		821	{
		822	return 0;
		823	}
		824
		825	static UNOP coro_setup_op;
		826
		827	static void NOINLINE /* noinline to keep it out of the transfer fast path */
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))));
847	PUTBACK;	869	PUTBACK;
…		…
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 */
		880
		881	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
		882	coro_setup_op.op_next = PL_op;
		883	coro_setup_op.op_type = OP_CUSTOM;
		884	coro_setup_op.op_ppaddr = pp_slf;
		885	/* no flags required, as an init function won't be called */
		886
		887	PL_op = (OP *)&coro_setup_op;
		888
		889	/* copy throw, in case it was set before coro_setup */
		890	CORO_THROW = coro->except;
859	}	891	}
860		892
861	static void	893	static void
862	coro_destruct (pTHX_ struct coro *coro)	894	coro_destruct (pTHX_ struct coro *coro)
863	{	895	{
…		…
887		919
888	SvREFCNT_dec (PL_diehook);	920	SvREFCNT_dec (PL_diehook);
889	SvREFCNT_dec (PL_warnhook);	921	SvREFCNT_dec (PL_warnhook);
890		922
891	SvREFCNT_dec (coro->saved_deffh);	923	SvREFCNT_dec (coro->saved_deffh);
892	SvREFCNT_dec (coro->throw);	924	SvREFCNT_dec (CORO_THROW);
893		925
894	coro_destruct_stacks (aTHX);	926	coro_destruct_stacks (aTHX);
895	}	927	}
896		928
897	static void	929	INLINE void
898	free_coro_mortal (pTHX)	930	free_coro_mortal (pTHX)
899	{	931	{
900	if (expect_true (coro_mortal))	932	if (expect_true (coro_mortal))
901	{	933	{
902	SvREFCNT_dec (coro_mortal);	934	SvREFCNT_dec (coro_mortal);
…		…
907	static int	939	static int
908	runops_trace (pTHX)	940	runops_trace (pTHX)
909	{	941	{
910	COP *oldcop = 0;	942	COP *oldcop = 0;
911	int oldcxix = -2;	943	int oldcxix = -2;
912	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */	944	struct coro coro = SvSTATE_current; / trace cctx is tied to specific coro */
913	coro_cctx *cctx = coro->cctx;	945	coro_cctx *cctx = coro->cctx;
914		946
915	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	947	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
916	{	948	{
917	PERL_ASYNC_CHECK ();	949	PERL_ASYNC_CHECK ();
…		…
1026		1058
1027	TAINT_NOT;	1059	TAINT_NOT;
1028	return 0;	1060	return 0;
1029	}	1061	}
1030		1062
1031	/* inject a fake call to Coro::State::_cctx_init into the execution */	1063	static struct coro_cctx *cctx_ssl_cctx;
1032	/* _cctx_init should be careful, as it could be called at almost any time */	1064	static struct CoroSLF cctx_ssl_frame;
1033	/* during execution of a perl program */	1065
		1066	static void
		1067	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1068	{
		1069	ta->prev = (struct coro *)cctx_ssl_cctx;
		1070	ta->next = 0;
		1071	}
		1072
		1073	static int
		1074	slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
		1075	{
		1076	*frame = cctx_ssl_frame;
		1077
		1078	return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
		1079	}
		1080
		1081	/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1034	static void NOINLINE	1082	static void NOINLINE
1035	cctx_prepare (pTHX_ coro_cctx *cctx)	1083	cctx_prepare (pTHX_ coro_cctx *cctx)
1036	{	1084	{
1037	dSP;
1038	LOGOP myop;
1039
1040	PL_top_env = &PL_start_env;	1085	PL_top_env = &PL_start_env;
1041		1086
1042	if (cctx->flags & CC_TRACE)	1087	if (cctx->flags & CC_TRACE)
1043	PL_runops = runops_trace;	1088	PL_runops = runops_trace;
1044		1089
1045	Zero (&myop, 1, LOGOP);	1090	/* we already must be executing an SLF op, there is no other valid way
1046	myop.op_next = PL_op;	1091	* that can lead to creation of a new cctx */
1047	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	1092	assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
		1093	slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1048		1094
1049	PUSHMARK (SP);	1095	/* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1050	EXTEND (SP, 2);	1096	cctx_ssl_cctx = cctx;
1051	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1097	cctx_ssl_frame = slf_frame;
1052	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1098
1053	PUTBACK;	1099	slf_frame.prepare = slf_prepare_set_stacklevel;
1054	PL_op = (OP *)&myop;	1100	slf_frame.check = slf_check_set_stacklevel;
1055	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1101	}
1056	SPAGAIN;	1102
		1103	/* the tail of transfer: execute stuff we can only do after a transfer */
		1104	INLINE void
		1105	transfer_tail (pTHX)
		1106	{
		1107	free_coro_mortal (aTHX);
1057	}	1108	}
1058		1109
1059	/*	1110	/*
1060	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1061	*/	1112	*/
…		…
1068	# endif	1119	# endif
1069	#endif	1120	#endif
1070	{	1121	{
1071	dTHX;	1122	dTHX;
1072		1123
1073	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1124	/* normally we would need to skip the entersub here */
1074	UNLOCK;	1125	/* 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;	1126	/* PL_nop = PL_nop->op_next */
1078		1127
1079	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1080	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1130
		1131	/* cctx_run is the alternative tail of transfer() */
		1132	transfer_tail (aTHX);
1081		1133
1082	/* somebody or something will hit me for both perl_run and PL_restartop */	1134	/* somebody or something will hit me for both perl_run and PL_restartop */
1083	PL_restartop = PL_op;	1135	PL_restartop = PL_op;
1084	perl_run (PL_curinterp);	1136	perl_run (PL_curinterp);
1085		1137
…		…
1101	coro_cctx *cctx;	1153	coro_cctx *cctx;
1102		1154
1103	++cctx_count;	1155	++cctx_count;
1104	New (0, cctx, 1, coro_cctx);	1156	New (0, cctx, 1, coro_cctx);
1105		1157
1106	cctx->gen = cctx_gen;	1158	cctx->gen = cctx_gen;
1107	cctx->flags = 0;	1159	cctx->flags = 0;
		1160	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1108		1161
1109	return cctx;	1162	return cctx;
1110	}	1163	}
1111		1164
1112	/* create a new cctx only suitable as source */	1165	/* create a new cctx only suitable as source */
1113	static coro_cctx *	1166	static coro_cctx *
1114	cctx_new_empty ()	1167	cctx_new_empty ()
1115	{	1168	{
1116	coro_cctx *cctx = cctx_new ();	1169	coro_cctx *cctx = cctx_new ();
1117		1170
1118	cctx->sptr = 0;	1171	cctx->sptr = 0;
1119	cctx->idle_sp = 0; /* should never be a valid address */
1120	coro_create (&cctx->cctx, 0, 0, 0, 0);	1172	coro_create (&cctx->cctx, 0, 0, 0, 0);
1121		1173
1122	return cctx;	1174	return cctx;
1123	}	1175	}
1124		1176
…		…
1135	/* mmap supposedly does allocate-on-write for us */	1187	/* mmap supposedly does allocate-on-write for us */
1136	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1188	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
1137		1189
1138	if (cctx->sptr != (void *)-1)	1190	if (cctx->sptr != (void *)-1)
1139	{	1191	{
1140	# if CORO_STACKGUARD	1192	#if CORO_STACKGUARD
1141	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1193	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1142	# endif	1194	#endif
1143	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1195	stack_start = (char )cctx->sptr + CORO_STACKGUARD PAGESIZE;
1144	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1196	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1145	cctx->flags \|= CC_MAPPED;	1197	cctx->flags \|= CC_MAPPED;
1146	}	1198	}
1147	else	1199	else
1148	#endif	1200	#endif
1149	{	1201	{
1150	cctx->ssize = cctx_stacksize * (long)sizeof (long);	1202	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1151	New (0, cctx->sptr, cctx_stacksize, long);	1203	New (0, cctx->sptr, cctx_stacksize, long);
1152		1204
1153	if (!cctx->sptr)	1205	if (!cctx->sptr)
1154	{	1206	{
1155	perror ("FATAL: unable to allocate stack for coroutine");	1207	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1156	_exit (EXIT_FAILURE);	1208	_exit (EXIT_FAILURE);
1157	}	1209	}
1158		1210
1159	stack_start = cctx->sptr;	1211	stack_start = cctx->sptr;
1160	stack_size = cctx->ssize;	1212	stack_size = cctx->ssize;
1161	}	1213	}
1162		1214
1163	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);	1215	#if CORO_USE_VALGRIND
		1216	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char )stack_start, (char )stack_start + stack_size);
		1217	#endif
		1218
1164	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1219	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1165		1220
1166	return cctx;	1221	return cctx;
1167	}	1222	}
1168		1223
…		…
1176	coro_destroy (&cctx->cctx);	1231	coro_destroy (&cctx->cctx);
1177		1232
1178	/* coro_transfer creates new, empty cctx's */	1233	/* coro_transfer creates new, empty cctx's */
1179	if (cctx->sptr)	1234	if (cctx->sptr)
1180	{	1235	{
1181	#if CORO_USE_VALGRIND	1236	#if CORO_USE_VALGRIND
1182	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1237	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1183	#endif	1238	#endif
1184		1239
1185	#if HAVE_MMAP	1240	#if HAVE_MMAP
1186	if (cctx->flags & CC_MAPPED)	1241	if (cctx->flags & CC_MAPPED)
1187	munmap (cctx->sptr, cctx->ssize);	1242	munmap (cctx->sptr, cctx->ssize);
1188	else	1243	else
…		…
1215	}	1270	}
1216		1271
1217	static void	1272	static void
1218	cctx_put (coro_cctx *cctx)	1273	cctx_put (coro_cctx *cctx)
1219	{	1274	{
1220	assert (("cctx_put called on non-initialised cctx", cctx->sptr));	1275	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1221		1276
1222	/* free another cctx if overlimit */	1277	/* free another cctx if overlimit */
1223	if (expect_false (cctx_idle >= cctx_max_idle))	1278	if (expect_false (cctx_idle >= cctx_max_idle))
1224	{	1279	{
1225	coro_cctx *first = cctx_first;	1280	coro_cctx *first = cctx_first;
…		…
1237	/ coroutine switching ***************************************************/	1292	/ coroutine switching ***************************************************/
1238		1293
1239	static void	1294	static void
1240	transfer_check (pTHX_ struct coro prev, struct coro next)	1295	transfer_check (pTHX_ struct coro prev, struct coro next)
1241	{	1296	{
		1297	/* TODO: throwing up here is considered harmful */
		1298
1242	if (expect_true (prev != next))	1299	if (expect_true (prev != next))
1243	{	1300	{
1244	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))	1301	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
1245	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1302	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1246		1303
1247	if (expect_false (next->flags & CF_RUNNING))	1304	if (expect_false (next->flags & CF_RUNNING))
1248	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1305	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1249		1306
1250	if (expect_false (next->flags & CF_DESTROYED))	1307	if (expect_false (next->flags & CF_DESTROYED))
1251	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1308	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1252		1309
1253	#if !PERL_VERSION_ATLEAST (5,10,0)	1310	#if !PERL_VERSION_ATLEAST (5,10,0)
1254	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1311	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1255	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1312	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1256	#endif	1313	#endif
1257	}	1314	}
1258	}	1315	}
1259		1316
1260	/* always use the TRANSFER macro */	1317	/* always use the TRANSFER macro */
1261	static void NOINLINE	1318	static void NOINLINE /* noinline so we have a fixed stackframe */
1262	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)	1319	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
1263	{	1320	{
1264	dSTACKLEVEL;	1321	dSTACKLEVEL;
1265		1322
1266	/* sometimes transfer is only called to set idle_sp */	1323	/* sometimes transfer is only called to set idle_sp */
…		…
1269	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1326	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1270	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */	1327	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
1271	}	1328	}
1272	else if (expect_true (prev != next))	1329	else if (expect_true (prev != next))
1273	{	1330	{
1274	static volatile int has_throw;
1275	coro_cctx *prev__cctx;	1331	coro_cctx *prev__cctx;
1276		1332
1277	if (expect_false (prev->flags & CF_NEW))	1333	if (expect_false (prev->flags & CF_NEW))
1278	{	1334	{
1279	/* create a new empty/source context */	1335	/* create a new empty/source context */
…		…
1282	prev->flags \|= CF_RUNNING;	1338	prev->flags \|= CF_RUNNING;
1283	}	1339	}
1284		1340
1285	prev->flags &= ~CF_RUNNING;	1341	prev->flags &= ~CF_RUNNING;
1286	next->flags \|= CF_RUNNING;	1342	next->flags \|= CF_RUNNING;
1287
1288	LOCK;
1289		1343
1290	/* first get rid of the old state */	1344	/* first get rid of the old state */
1291	save_perl (aTHX_ prev);	1345	save_perl (aTHX_ prev);
1292		1346
1293	if (expect_false (next->flags & CF_NEW))	1347	if (expect_false (next->flags & CF_NEW))
…		…
1300	else	1354	else
1301	load_perl (aTHX_ next);	1355	load_perl (aTHX_ next);
1302		1356
1303	prev__cctx = prev->cctx;	1357	prev__cctx = prev->cctx;
1304		1358
1305	/* possibly "free" the cctx */	1359	/* possibly untie and reuse the cctx */
1306	if (expect_true (	1360	if (expect_true (
1307	prev__cctx->idle_sp == STACKLEVEL	1361	prev__cctx->idle_sp == STACKLEVEL
1308	&& !(prev__cctx->flags & CC_TRACE)	1362	&& !(prev__cctx->flags & CC_TRACE)
1309	&& !force_cctx	1363	&& !force_cctx
1310	))	1364	))
1311	{	1365	{
1312	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1366	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1313	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1367	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1314		1368
1315	prev->cctx = 0;	1369	prev->cctx = 0;
1316		1370
1317	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1371	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1318	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1372	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1325		1379
1326	++next->usecount;	1380	++next->usecount;
1327		1381
1328	if (expect_true (!next->cctx))	1382	if (expect_true (!next->cctx))
1329	next->cctx = cctx_get (aTHX);	1383	next->cctx = cctx_get (aTHX);
1330
1331	has_throw = !!next->throw;
1332		1384
1333	if (expect_false (prev__cctx != next->cctx))	1385	if (expect_false (prev__cctx != next->cctx))
1334	{	1386	{
1335	prev__cctx->top_env = PL_top_env;	1387	prev__cctx->top_env = PL_top_env;
1336	PL_top_env = next->cctx->top_env;	1388	PL_top_env = next->cctx->top_env;
1337	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1389	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1338	}	1390	}
1339		1391
1340	free_coro_mortal (aTHX);	1392	transfer_tail (aTHX);
1341	UNLOCK;
1342
1343	if (expect_false (has_throw))
1344	{
1345	struct coro *coro = SvSTATE (coro_current);
1346
1347	if (coro->throw)
1348	{
1349	SV *exception = coro->throw;
1350	coro->throw = 0;
1351	sv_setsv (ERRSV, exception);
1352	croak (0);
1353	}
1354	}
1355	}	1393	}
1356	}	1394	}
1357
1358	struct transfer_args
1359	{
1360	struct coro prev, next;
1361	};
1362		1395
1363	#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))
1364	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1397	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1365		1398
1366	/ high level stuff ******************************************************/	1399	/ high level stuff ******************************************************/
…		…
1368	static int	1401	static int
1369	coro_state_destroy (pTHX_ struct coro *coro)	1402	coro_state_destroy (pTHX_ struct coro *coro)
1370	{	1403	{
1371	if (coro->flags & CF_DESTROYED)	1404	if (coro->flags & CF_DESTROYED)
1372	return 0;	1405	return 0;
		1406
		1407	if (coro->on_destroy)
		1408	coro->on_destroy (aTHX_ coro);
1373		1409
1374	coro->flags \|= CF_DESTROYED;	1410	coro->flags \|= CF_DESTROYED;
1375		1411
1376	if (coro->flags & CF_READY)	1412	if (coro->flags & CF_READY)
1377	{	1413	{
1378	/* reduce nready, as destroying a ready coro effectively unreadies it */	1414	/* reduce nready, as destroying a ready coro effectively unreadies it */
1379	/* alternative: look through all ready queues and remove the coro */	1415	/* alternative: look through all ready queues and remove the coro */
1380	LOCK;
1381	--coro_nready;	1416	--coro_nready;
1382	UNLOCK;
1383	}	1417	}
1384	else	1418	else
1385	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 */
1386		1420
1387	if (coro->mainstack && coro->mainstack != main_mainstack)	1421	if (coro->mainstack && coro->mainstack != main_mainstack)
1388	{	1422	{
1389	struct coro temp;	1423	struct coro temp;
1390		1424
1391	if (coro->flags & CF_RUNNING)	1425	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1392	croak ("FATAL: tried to destroy currently running coroutine");
1393		1426
1394	save_perl (aTHX_ &temp);	1427	save_perl (aTHX_ &temp);
1395	load_perl (aTHX_ coro);	1428	load_perl (aTHX_ coro);
1396		1429
1397	coro_destruct (aTHX_ coro);	1430	coro_destruct (aTHX_ coro);
…		…
1448	# define MGf_DUP 0	1481	# define MGf_DUP 0
1449	#endif	1482	#endif
1450	};	1483	};
1451		1484
1452	static void	1485	static void
1453	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)
1454	{	1487	{
1455	ta->prev = SvSTATE (prev_sv);	1488	ta->prev = SvSTATE (prev_sv);
1456	ta->next = SvSTATE (next_sv);	1489	ta->next = SvSTATE (next_sv);
1457	TRANSFER_CHECK (*ta);	1490	TRANSFER_CHECK (*ta);
1458	}	1491	}
1459		1492
1460	static void	1493	static void
1461	api_transfer (SV prev_sv, SV next_sv)	1494	api_transfer (pTHX_ SV prev_sv, SV next_sv)
1462	{	1495	{
1463	dTHX;
1464	struct transfer_args ta;	1496	struct coro_transfer_args ta;
1465		1497
1466	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1498	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1467	TRANSFER (ta, 1);	1499	TRANSFER (ta, 1);
1468	}	1500	}
1469		1501
1470	/ Coro ******************************************************************/	1502	/ Coro ******************************************************************/
1471		1503
1472	static void	1504	INLINE void
1473	coro_enq (pTHX_ SV *coro_sv)	1505	coro_enq (pTHX_ struct coro *coro)
1474	{	1506	{
1475	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));
1476	}	1508	}
1477		1509
1478	static SV *	1510	INLINE SV *
1479	coro_deq (pTHX)	1511	coro_deq (pTHX)
1480	{	1512	{
1481	int prio;	1513	int prio;
1482		1514
1483	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1515	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1486		1518
1487	return 0;	1519	return 0;
1488	}	1520	}
1489		1521
1490	static int	1522	static int
1491	api_ready (SV *coro_sv)	1523	api_ready (pTHX_ SV *coro_sv)
1492	{	1524	{
1493	dTHX;
1494	struct coro *coro;	1525	struct coro *coro;
1495	SV *sv_hook;	1526	SV *sv_hook;
1496	void (*xs_hook)(void);	1527	void (*xs_hook)(void);
1497		1528
1498	if (SvROK (coro_sv))	1529	if (SvROK (coro_sv))
…		…
1503	if (coro->flags & CF_READY)	1534	if (coro->flags & CF_READY)
1504	return 0;	1535	return 0;
1505		1536
1506	coro->flags \|= CF_READY;	1537	coro->flags \|= CF_READY;
1507		1538
1508	LOCK;
1509
1510	sv_hook = coro_nready ? 0 : coro_readyhook;	1539	sv_hook = coro_nready ? 0 : coro_readyhook;
1511	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1540	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1512		1541
1513	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));	1542	coro_enq (aTHX_ coro);
1514	++coro_nready;	1543	++coro_nready;
1515		1544
1516	UNLOCK;
1517
1518	if (sv_hook)	1545	if (sv_hook)
1519	{	1546	{
1520	dSP;	1547	dSP;
1521		1548
1522	ENTER;	1549	ENTER;
1523	SAVETMPS;	1550	SAVETMPS;
1524		1551
1525	PUSHMARK (SP);	1552	PUSHMARK (SP);
1526	PUTBACK;	1553	PUTBACK;
1527	call_sv (sv_hook, G_DISCARD);	1554	call_sv (sv_hook, G_VOID \| G_DISCARD);
1528	SPAGAIN;
1529		1555
1530	FREETMPS;	1556	FREETMPS;
1531	LEAVE;	1557	LEAVE;
1532	}	1558	}
1533		1559
…		…
1536		1562
1537	return 1;	1563	return 1;
1538	}	1564	}
1539		1565
1540	static int	1566	static int
1541	api_is_ready (SV *coro_sv)	1567	api_is_ready (pTHX_ SV *coro_sv)
1542	{	1568	{
1543	dTHX;
1544	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1569	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1545	}	1570	}
1546		1571
1547	static void	1572	INLINE void
1548	prepare_schedule (pTHX_ struct transfer_args *ta)	1573	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1549	{	1574	{
1550	SV prev_sv, next_sv;	1575	SV prev_sv, next_sv;
1551		1576
1552	for (;;)	1577	for (;;)
1553	{	1578	{
1554	LOCK;
1555	next_sv = coro_deq (aTHX);	1579	next_sv = coro_deq (aTHX);
1556		1580
1557	/* nothing to schedule: call the idle handler */	1581	/* nothing to schedule: call the idle handler */
1558	if (expect_false (!next_sv))	1582	if (expect_false (!next_sv))
1559	{	1583	{
1560	dSP;	1584	dSP;
1561	UNLOCK;
1562		1585
1563	ENTER;	1586	ENTER;
1564	SAVETMPS;	1587	SAVETMPS;
1565		1588
1566	PUSHMARK (SP);	1589	PUSHMARK (SP);
1567	PUTBACK;	1590	PUTBACK;
1568	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1591	call_sv (get_sv ("Coro::idle", FALSE), G_VOID \| G_DISCARD);
1569	SPAGAIN;
1570		1592
1571	FREETMPS;	1593	FREETMPS;
1572	LEAVE;	1594	LEAVE;
1573	continue;	1595	continue;
1574	}	1596	}
1575		1597
1576	ta->next = SvSTATE (next_sv);	1598	ta->next = SvSTATE_hv (next_sv);
1577		1599
1578	/* cannot transfer to destroyed coros, skip and look for next */	1600	/* cannot transfer to destroyed coros, skip and look for next */
1579	if (expect_false (ta->next->flags & CF_DESTROYED))	1601	if (expect_false (ta->next->flags & CF_DESTROYED))
1580	{	1602	{
1581	UNLOCK;
1582	SvREFCNT_dec (next_sv);	1603	SvREFCNT_dec (next_sv);
1583	/* coro_nready is already taken care of by destroy */	1604	/* coro_nready has already been taken care of by destroy */
1584	continue;	1605	continue;
1585	}	1606	}
1586		1607
1587	--coro_nready;	1608	--coro_nready;
1588	UNLOCK;
1589	break;	1609	break;
1590	}	1610	}
1591		1611
1592	/* free this only after the transfer */	1612	/* free this only after the transfer */
1593	prev_sv = SvRV (coro_current);	1613	prev_sv = SvRV (coro_current);
1594	ta->prev = SvSTATE (prev_sv);	1614	ta->prev = SvSTATE_hv (prev_sv);
1595	TRANSFER_CHECK (*ta);	1615	TRANSFER_CHECK (*ta);
1596	assert (ta->next->flags & CF_READY);	1616	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1597	ta->next->flags &= ~CF_READY;	1617	ta->next->flags &= ~CF_READY;
1598	SvRV_set (coro_current, next_sv);	1618	SvRV_set (coro_current, next_sv);
1599		1619
1600	LOCK;
1601	free_coro_mortal (aTHX);	1620	free_coro_mortal (aTHX);
1602	coro_mortal = prev_sv;	1621	coro_mortal = prev_sv;
1603	UNLOCK;
1604	}	1622	}
1605		1623
1606	static void	1624	INLINE void
1607	prepare_cede (pTHX_ struct transfer_args *ta)	1625	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1608	{	1626	{
1609	api_ready (coro_current);	1627	api_ready (aTHX_ coro_current);
1610	prepare_schedule (aTHX_ ta);	1628	prepare_schedule (aTHX_ ta);
1611	}	1629	}
1612		1630
		1631	INLINE void
		1632	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1633	{
		1634	SV *prev = SvRV (coro_current);
		1635
		1636	if (coro_nready)
		1637	{
		1638	prepare_schedule (aTHX_ ta);
		1639	api_ready (aTHX_ prev);
		1640	}
		1641	else
		1642	prepare_nop (aTHX_ ta);
		1643	}
		1644
		1645	static void
		1646	api_schedule (pTHX)
		1647	{
		1648	struct coro_transfer_args ta;
		1649
		1650	prepare_schedule (aTHX_ &ta);
		1651	TRANSFER (ta, 1);
		1652	}
		1653
1613	static int	1654	static int
1614	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1655	api_cede (pTHX)
1615	{	1656	{
1616	if (coro_nready)	1657	struct coro_transfer_args ta;
1617	{	1658
1618	SV *prev = SvRV (coro_current);
1619	prepare_schedule (aTHX_ ta);	1659	prepare_cede (aTHX_ &ta);
1620	api_ready (prev);	1660
		1661	if (expect_true (ta.prev != ta.next))
		1662	{
		1663	TRANSFER (ta, 1);
1621	return 1;	1664	return 1;
1622	}	1665	}
1623	else	1666	else
1624	return 0;	1667	return 0;
1625	}	1668	}
1626		1669
1627	static void
1628	api_schedule (void)
1629	{
1630	dTHX;
1631	struct transfer_args ta;
1632
1633	prepare_schedule (aTHX_ &ta);
1634	TRANSFER (ta, 1);
1635	}
1636
1637	static int	1670	static int
1638	api_cede (void)	1671	api_cede_notself (pTHX)
1639	{	1672	{
1640	dTHX;	1673	if (coro_nready)
		1674	{
1641	struct transfer_args ta;	1675	struct coro_transfer_args ta;
1642		1676
1643	prepare_cede (aTHX_ &ta);	1677	prepare_cede_notself (aTHX_ &ta);
1644
1645	if (expect_true (ta.prev != ta.next))
1646	{
1647	TRANSFER (ta, 1);	1678	TRANSFER (ta, 1);
1648	return 1;	1679	return 1;
1649	}	1680	}
1650	else	1681	else
1651	return 0;	1682	return 0;
1652	}	1683	}
1653		1684
1654	static int	1685	static void
1655	api_cede_notself (void)
1656	{
1657	dTHX;
1658	struct transfer_args ta;
1659
1660	if (prepare_cede_notself (aTHX_ &ta))
1661	{
1662	TRANSFER (ta, 1);
1663	return 1;
1664	}
1665	else
1666	return 0;
1667	}
1668
1669	static void
1670	api_trace (SV *coro_sv, int flags)	1686	api_trace (pTHX_ SV *coro_sv, int flags)
1671	{	1687	{
1672	dTHX;
1673	struct coro *coro = SvSTATE (coro_sv);	1688	struct coro *coro = SvSTATE (coro_sv);
1674		1689
1675	if (flags & CC_TRACE)	1690	if (flags & CC_TRACE)
1676	{	1691	{
1677	if (!coro->cctx)	1692	if (!coro->cctx)
1678	coro->cctx = cctx_new_run ();	1693	coro->cctx = cctx_new_run ();
1679	else if (!(coro->cctx->flags & CC_TRACE))	1694	else if (!(coro->cctx->flags & CC_TRACE))
1680	croak ("cannot enable tracing on coroutine with custom stack");	1695	croak ("cannot enable tracing on coroutine with custom stack,");
1681		1696
1682	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));	1697	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
1683	}	1698	}
1684	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1699	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1685	{	1700	{
…		…
1690	else	1705	else
1691	coro->slot->runops = RUNOPS_DEFAULT;	1706	coro->slot->runops = RUNOPS_DEFAULT;
1692	}	1707	}
1693	}	1708	}
1694		1709
1695	#if 0	1710	/*****************************************************************************/
		1711	/* schedule-like-function opcode (SLF) */
		1712
		1713	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1714	static const CV *slf_cv;
		1715	static SV **slf_argv;
		1716	static int slf_argc, slf_arga; /* count, allocated */
		1717	static I32 slf_ax; /* top of stack, for restore */
		1718
		1719	/* this restores the stack in the case we patched the entersub, to */
		1720	/* recreate the stack frame as perl will on following calls */
		1721	/* since entersub cleared the stack */
		1722	static OP *
		1723	pp_restore (pTHX)
		1724	{
		1725	int i;
		1726	SV **SP = PL_stack_base + slf_ax;
		1727
		1728	PUSHMARK (SP);
		1729
		1730	EXTEND (SP, slf_argc + 1);
		1731
		1732	for (i = 0; i < slf_argc; ++i)
		1733	PUSHs (sv_2mortal (slf_argv [i]));
		1734
		1735	PUSHs ((SV *)CvGV (slf_cv));
		1736
		1737	RETURNOP (slf_restore.op_first);
		1738	}
		1739
1696	static int	1740	static void
1697	coro_gensub_free (pTHX_ SV sv, MAGIC mg)	1741	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1698	{	1742	{
1699	AV *padlist;	1743	SV arg = (SV )slf_frame.data;
1700	AV av = (AV )mg->mg_obj;
1701		1744
1702	abort ();	1745	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1703
1704	return 0;
1705	}	1746	}
1706		1747
1707	static MGVTBL coro_gensub_vtbl = {	1748	static void
1708	0, 0, 0, 0,	1749	slf_init_transfer (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
1709	coro_gensub_free	1750	{
1710	};	1751	if (items != 2)
1711	#endif	1752	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1753
		1754	frame->prepare = slf_prepare_transfer;
		1755	frame->check = slf_check_nop;
		1756	frame->data = (void )arg; / let's hope it will stay valid */
		1757	}
		1758
		1759	static void
		1760	slf_init_schedule (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1761	{
		1762	frame->prepare = prepare_schedule;
		1763	frame->check = slf_check_nop;
		1764	}
		1765
		1766	static void
		1767	slf_init_cede (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1768	{
		1769	frame->prepare = prepare_cede;
		1770	frame->check = slf_check_nop;
		1771	}
		1772
		1773	static void
		1774	slf_init_cede_notself (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1775	{
		1776	frame->prepare = prepare_cede_notself;
		1777	frame->check = slf_check_nop;
		1778	}
		1779
		1780	/*
		1781	* these not obviously related functions are all rolled into one
		1782	* function to increase chances that they all will call transfer with the same
		1783	* stack offset
		1784	* SLF stands for "schedule-like-function".
		1785	*/
		1786	static OP *
		1787	pp_slf (pTHX)
		1788	{
		1789	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1790
		1791	/* set up the slf frame, unless it has already been set-up */
		1792	/* the latter happens when a new coro has been started */
		1793	/* or when a new cctx was attached to an existing coroutine */
		1794	if (expect_true (!slf_frame.prepare))
		1795	{
		1796	/* first iteration */
		1797	dSP;
		1798	SV **arg = PL_stack_base + TOPMARK + 1;
		1799	int items = SP - arg; /* args without function object */
		1800	SV gv = sp;
		1801
		1802	/* do a quick consistency check on the "function" object, and if it isn't */
		1803	/* for us, divert to the real entersub */
		1804	if (SvTYPE (gv) != SVt_PVGV
		1805	\|\| !GvCV (gv)
		1806	\|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1807	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1808
		1809	if (!(PL_op->op_flags & OPf_STACKED))
		1810	{
		1811	/* ampersand-form of call, use @_ instead of stack */
		1812	AV *av = GvAV (PL_defgv);
		1813	arg = AvARRAY (av);
		1814	items = AvFILLp (av) + 1;
		1815	}
		1816
		1817	/* now call the init function, which needs to set up slf_frame */
		1818	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1819	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1820
		1821	/* pop args */
		1822	SP = PL_stack_base + POPMARK;
		1823
		1824	PUTBACK;
		1825	}
		1826
		1827	/* now that we have a slf_frame, interpret it! */
		1828	/* we use a callback system not to make the code needlessly */
		1829	/* complicated, but so we can run multiple perl coros from one cctx */
		1830
		1831	do
		1832	{
		1833	struct coro_transfer_args ta;
		1834
		1835	slf_frame.prepare (aTHX_ &ta);
		1836	TRANSFER (ta, 0);
		1837
		1838	checkmark = PL_stack_sp - PL_stack_base;
		1839	}
		1840	while (slf_frame.check (aTHX_ &slf_frame));
		1841
		1842	slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
		1843
		1844	/* exception handling */
		1845	if (expect_false (CORO_THROW))
		1846	{
		1847	SV *exception = sv_2mortal (CORO_THROW);
		1848
		1849	CORO_THROW = 0;
		1850	sv_setsv (ERRSV, exception);
		1851	croak (0);
		1852	}
		1853
		1854	/* return value handling - mostly like entersub */
		1855	/* make sure we put something on the stack in scalar context */
		1856	if (GIMME_V == G_SCALAR)
		1857	{
		1858	dSP;
		1859	SV **bot = PL_stack_base + checkmark;
		1860
		1861	if (sp == bot) /* too few, push undef */
		1862	bot [1] = &PL_sv_undef;
		1863	else if (sp != bot + 1) /* too many, take last one */
		1864	bot [1] = *sp;
		1865
		1866	SP = bot + 1;
		1867
		1868	PUTBACK;
		1869	}
		1870
		1871	return NORMAL;
		1872	}
		1873
		1874	static void
		1875	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1876	{
		1877	int i;
		1878	SV **arg = PL_stack_base + ax;
		1879	int items = PL_stack_sp - arg + 1;
		1880
		1881	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1882
		1883	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1884	&& PL_op->op_ppaddr != pp_slf)
		1885	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1886
		1887	CvFLAGS (cv) \|= CVf_SLF;
		1888	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1889	slf_cv = cv;
		1890
		1891	/* we patch the op, and then re-run the whole call */
		1892	/* we have to put the same argument on the stack for this to work */
		1893	/* and this will be done by pp_restore */
		1894	slf_restore.op_next = (OP *)&slf_restore;
		1895	slf_restore.op_type = OP_CUSTOM;
		1896	slf_restore.op_ppaddr = pp_restore;
		1897	slf_restore.op_first = PL_op;
		1898
		1899	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1900
		1901	if (PL_op->op_flags & OPf_STACKED)
		1902	{
		1903	if (items > slf_arga)
		1904	{
		1905	slf_arga = items;
		1906	free (slf_argv);
		1907	slf_argv = malloc (slf_arga * sizeof (SV *));
		1908	}
		1909
		1910	slf_argc = items;
		1911
		1912	for (i = 0; i < items; ++i)
		1913	slf_argv [i] = SvREFCNT_inc (arg [i]);
		1914	}
		1915	else
		1916	slf_argc = 0;
		1917
		1918	PL_op->op_ppaddr = pp_slf;
		1919	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1920
		1921	PL_op = (OP *)&slf_restore;
		1922	}
1712		1923
1713	/*****************************************************************************/	1924	/*****************************************************************************/
1714	/* PerlIO::cede */	1925	/* PerlIO::cede */
1715		1926
1716	typedef struct	1927	typedef struct
…		…
1744	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);	1955	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1745	double now = nvtime ();	1956	double now = nvtime ();
1746		1957
1747	if (now >= self->next)	1958	if (now >= self->next)
1748	{	1959	{
1749	api_cede ();	1960	api_cede (aTHX);
1750	self->next = now + self->every;	1961	self->next = now + self->every;
1751	}	1962	}
1752		1963
1753	return PerlIOBuf_flush (aTHX_ f);	1964	return PerlIOBuf_flush (aTHX_ f);
1754	}	1965	}
…		…
1783	PerlIOBuf_get_ptr,	1994	PerlIOBuf_get_ptr,
1784	PerlIOBuf_get_cnt,	1995	PerlIOBuf_get_cnt,
1785	PerlIOBuf_set_ptrcnt,	1996	PerlIOBuf_set_ptrcnt,
1786	};	1997	};
1787		1998
		1999	/*****************************************************************************/
		2000	/* Coro::Semaphore & Coro::Signal */
		2001
		2002	static SV *
		2003	coro_waitarray_new (pTHX_ int count)
		2004	{
		2005	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2006	AV *av = newAV ();
		2007	SV **ary;
		2008
		2009	/* unfortunately, building manually saves memory */
		2010	Newx (ary, 2, SV *);
		2011	AvALLOC (av) = ary;
		2012	AvARRAY (av) = ary;
		2013	AvMAX (av) = 1;
		2014	AvFILLp (av) = 0;
		2015	ary [0] = newSViv (count);
		2016
		2017	return newRV_noinc ((SV *)av);
		2018	}
		2019
		2020	/* semaphore */
		2021
		2022	static void
		2023	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2024	{
		2025	SV *count_sv = AvARRAY (av)[0];
		2026	IV count = SvIVX (count_sv);
		2027
		2028	count += adjust;
		2029	SvIVX (count_sv) = count;
		2030
		2031	/* now wake up as many waiters as are expected to lock */
		2032	while (count > 0 && AvFILLp (av) > 0)
		2033	{
		2034	SV *cb;
		2035
		2036	/* swap first two elements so we can shift a waiter */
		2037	AvARRAY (av)[0] = AvARRAY (av)[1];
		2038	AvARRAY (av)[1] = count_sv;
		2039	cb = av_shift (av);
		2040
		2041	if (SvOBJECT (cb))
		2042	api_ready (aTHX_ cb);
		2043	else
		2044	croak ("callbacks not yet supported");
		2045
		2046	SvREFCNT_dec (cb);
		2047
		2048	--count;
		2049	}
		2050	}
		2051
		2052	static void
		2053	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2054	{
		2055	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2056	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2057	}
		2058
		2059	static int
		2060	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
		2061	{
		2062	AV av = (AV )frame->data;
		2063	SV *count_sv = AvARRAY (av)[0];
		2064
		2065	/* if we are about to throw, don't actually acquire the lock, just throw */
		2066	if (CORO_THROW)
		2067	return 0;
		2068	else if (SvIVX (count_sv) > 0)
		2069	{
		2070	SvSTATE_current->on_destroy = 0;
		2071
		2072	if (acquire)
		2073	SvIVX (count_sv) = SvIVX (count_sv) - 1;
		2074	else
		2075	coro_semaphore_adjust (aTHX_ av, 0);
		2076
		2077	return 0;
		2078	}
		2079	else
		2080	{
		2081	int i;
		2082	/* if we were woken up but can't down, we look through the whole */
		2083	/* waiters list and only add us if we aren't in there already */
		2084	/* this avoids some degenerate memory usage cases */
		2085
		2086	for (i = 1; i <= AvFILLp (av); ++i)
		2087	if (AvARRAY (av)[i] == SvRV (coro_current))
		2088	return 1;
		2089
		2090	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2091	return 1;
		2092	}
		2093	}
		2094
		2095	static int
		2096	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
		2097	{
		2098	return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
		2099	}
		2100
		2101	static int
		2102	slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
		2103	{
		2104	return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
		2105	}
		2106
		2107	static void
		2108	slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2109	{
		2110	AV av = (AV )SvRV (arg [0]);
		2111
		2112	if (SvIVX (AvARRAY (av)[0]) > 0)
		2113	{
		2114	frame->data = (void *)av;
		2115	frame->prepare = prepare_nop;
		2116	}
		2117	else
		2118	{
		2119	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2120
		2121	frame->data = (void )sv_2mortal (SvREFCNT_inc ((SV )av));
		2122	frame->prepare = prepare_schedule;
		2123
		2124	/* to avoid race conditions when a woken-up coro gets terminated */
		2125	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2126	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2127	}
		2128	}
		2129
		2130	static void
		2131	slf_init_semaphore_down (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2132	{
		2133	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2134	frame->check = slf_check_semaphore_down;
		2135	}
		2136
		2137	static void
		2138	slf_init_semaphore_wait (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2139	{
		2140	slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
		2141	frame->check = slf_check_semaphore_wait;
		2142	}
		2143
		2144	/* signal */
		2145
		2146	static void
		2147	coro_signal_wake (pTHX_ AV *av, int count)
		2148	{
		2149	SvIVX (AvARRAY (av)[0]) = 0;
		2150
		2151	/* now signal count waiters */
		2152	while (count > 0 && AvFILLp (av) > 0)
		2153	{
		2154	SV *cb;
		2155
		2156	/* swap first two elements so we can shift a waiter */
		2157	cb = AvARRAY (av)[0];
		2158	AvARRAY (av)[0] = AvARRAY (av)[1];
		2159	AvARRAY (av)[1] = cb;
		2160
		2161	cb = av_shift (av);
		2162
		2163	api_ready (aTHX_ cb);
		2164	sv_setiv (cb, 0); /* signal waiter */
		2165	SvREFCNT_dec (cb);
		2166
		2167	--count;
		2168	}
		2169	}
		2170
		2171	static int
		2172	slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
		2173	{
		2174	/* if we are about to throw, also stop waiting */
		2175	return SvROK ((SV *)frame->data) && !CORO_THROW;
		2176	}
		2177
		2178	static void
		2179	slf_init_signal_wait (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2180	{
		2181	AV av = (AV )SvRV (arg [0]);
		2182
		2183	if (SvIVX (AvARRAY (av)[0]))
		2184	{
		2185	SvIVX (AvARRAY (av)[0]) = 0;
		2186	frame->prepare = prepare_nop;
		2187	frame->check = slf_check_nop;
		2188	}
		2189	else
		2190	{
		2191	SV waiter = newRV_inc (SvRV (coro_current)); / owned by signal av */
		2192
		2193	av_push (av, waiter);
		2194
		2195	frame->data = (void )sv_2mortal (SvREFCNT_inc_NN (waiter)); / owned by process */
		2196	frame->prepare = prepare_schedule;
		2197	frame->check = slf_check_signal_wait;
		2198	}
		2199	}
		2200
		2201	/*****************************************************************************/
		2202	/* gensub: simple closure generation utility */
		2203
		2204	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2205
		2206	/* create a closure from XS, returns a code reference */
		2207	/* the arg can be accessed via GENSUB_ARG from the callback */
		2208	/* the callback must use dXSARGS/XSRETURN */
		2209	static SV *
		2210	gensub (pTHX_ void (xsub)(pTHX_ CV ), void *arg)
		2211	{
		2212	CV cv = (CV )newSV (0);
		2213
		2214	sv_upgrade ((SV *)cv, SVt_PVCV);
		2215
		2216	CvANON_on (cv);
		2217	CvISXSUB_on (cv);
		2218	CvXSUB (cv) = xsub;
		2219	GENSUB_ARG = arg;
		2220
		2221	return newRV_noinc ((SV *)cv);
		2222	}
		2223
		2224	/*****************************************************************************/
		2225	/* Coro::AIO */
		2226
		2227	#define CORO_MAGIC_type_aio PERL_MAGIC_ext
		2228
		2229	/* helper storage struct */
		2230	struct io_state
		2231	{
		2232	int errorno;
		2233	I32 laststype; /* U16 in 5.10.0 */
		2234	int laststatval;
		2235	Stat_t statcache;
		2236	};
		2237
		2238	static void
		2239	coro_aio_callback (pTHX_ CV *cv)
		2240	{
		2241	dXSARGS;
		2242	AV state = (AV )GENSUB_ARG;
		2243	SV *coro = av_pop (state);
		2244	SV *data_sv = newSV (sizeof (struct io_state));
		2245
		2246	av_extend (state, items);
		2247
		2248	sv_upgrade (data_sv, SVt_PV);
		2249	SvCUR_set (data_sv, sizeof (struct io_state));
		2250	SvPOK_only (data_sv);
		2251
		2252	{
		2253	struct io_state data = (struct io_state )SvPVX (data_sv);
		2254
		2255	data->errorno = errno;
		2256	data->laststype = PL_laststype;
		2257	data->laststatval = PL_laststatval;
		2258	data->statcache = PL_statcache;
		2259	}
		2260
		2261	/* now build the result vector out of all the parameters and the data_sv */
		2262	{
		2263	int i;
		2264
		2265	for (i = 0; i < items; ++i)
		2266	av_push (state, SvREFCNT_inc_NN (ST (i)));
		2267	}
		2268
		2269	av_push (state, data_sv);
		2270
		2271	api_ready (aTHX_ coro);
		2272	SvREFCNT_dec (coro);
		2273	SvREFCNT_dec ((AV *)state);
		2274	}
		2275
		2276	static int
		2277	slf_check_aio_req (pTHX_ struct CoroSLF *frame)
		2278	{
		2279	AV state = (AV )frame->data;
		2280
		2281	/* if we are about to throw, return early */
		2282	/* this does not cancel the aio request, but at least */
		2283	/* it quickly returns */
		2284	if (CORO_THROW)
		2285	return 0;
		2286
		2287	/* one element that is an RV? repeat! */
		2288	if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
		2289	return 1;
		2290
		2291	/* restore status */
		2292	{
		2293	SV *data_sv = av_pop (state);
		2294	struct io_state data = (struct io_state )SvPVX (data_sv);
		2295
		2296	errno = data->errorno;
		2297	PL_laststype = data->laststype;
		2298	PL_laststatval = data->laststatval;
		2299	PL_statcache = data->statcache;
		2300
		2301	SvREFCNT_dec (data_sv);
		2302	}
		2303
		2304	/* push result values */
		2305	{
		2306	dSP;
		2307	int i;
		2308
		2309	EXTEND (SP, AvFILLp (state) + 1);
		2310	for (i = 0; i <= AvFILLp (state); ++i)
		2311	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
		2312
		2313	PUTBACK;
		2314	}
		2315
		2316	return 0;
		2317	}
		2318
		2319	static void
		2320	slf_init_aio_req (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2321	{
		2322	AV state = (AV )sv_2mortal ((SV *)newAV ());
		2323	SV *coro_hv = SvRV (coro_current);
		2324	struct coro *coro = SvSTATE_hv (coro_hv);
		2325
		2326	/* put our coroutine id on the state arg */
		2327	av_push (state, SvREFCNT_inc_NN (coro_hv));
		2328
		2329	/* first see whether we have a non-zero priority and set it as AIO prio */
		2330	if (coro->prio)
		2331	{
		2332	dSP;
		2333
		2334	static SV *prio_cv;
		2335	static SV *prio_sv;
		2336
		2337	if (expect_false (!prio_cv))
		2338	{
		2339	prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
		2340	prio_sv = newSViv (0);
		2341	}
		2342
		2343	PUSHMARK (SP);
		2344	sv_setiv (prio_sv, coro->prio);
		2345	XPUSHs (prio_sv);
		2346
		2347	PUTBACK;
		2348	call_sv (prio_cv, G_VOID \| G_DISCARD);
		2349	}
		2350
		2351	/* now call the original request */
		2352	{
		2353	dSP;
		2354	CV req = (CV )CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
		2355	int i;
		2356
		2357	PUSHMARK (SP);
		2358
		2359	/* first push all args to the stack */
		2360	EXTEND (SP, items + 1);
		2361
		2362	for (i = 0; i < items; ++i)
		2363	PUSHs (arg [i]);
		2364
		2365	/* now push the callback closure */
		2366	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void )SvREFCNT_inc_NN ((SV )state))));
		2367
		2368	/* now call the AIO function - we assume our request is uncancelable */
		2369	PUTBACK;
		2370	call_sv ((SV *)req, G_VOID \| G_DISCARD);
		2371	}
		2372
		2373	/* now that the requets is going, we loop toll we have a result */
		2374	frame->data = (void *)state;
		2375	frame->prepare = prepare_schedule;
		2376	frame->check = slf_check_aio_req;
		2377	}
		2378
		2379	static void
		2380	coro_aio_req_xs (pTHX_ CV *cv)
		2381	{
		2382	dXSARGS;
		2383
		2384	CORO_EXECUTE_SLF_XS (slf_init_aio_req);
		2385
		2386	XSRETURN_EMPTY;
		2387	}
		2388
		2389	/*****************************************************************************/
1788		2390
1789	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2391	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1790		2392
1791	PROTOTYPES: DISABLE	2393	PROTOTYPES: DISABLE
1792		2394
1793	BOOT:	2395	BOOT:
1794	{	2396	{
1795	#ifdef USE_ITHREADS	2397	#ifdef USE_ITHREADS
1796	MUTEX_INIT (&coro_lock);
1797	# if CORO_PTHREAD	2398	# if CORO_PTHREAD
1798	coro_thx = PERL_GET_CONTEXT;	2399	coro_thx = PERL_GET_CONTEXT;
1799	# endif	2400	# endif
1800	#endif	2401	#endif
1801	BOOT_PAGESIZE;	2402	BOOT_PAGESIZE;
…		…
1822	main_top_env = PL_top_env;	2423	main_top_env = PL_top_env;
1823		2424
1824	while (main_top_env->je_prev)	2425	while (main_top_env->je_prev)
1825	main_top_env = main_top_env->je_prev;	2426	main_top_env = main_top_env->je_prev;
1826		2427
		2428	{
		2429	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2430
		2431	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2432	hv_store_ent (PL_custom_op_names, slf,
		2433	newSVpv ("coro_slf", 0), 0);
		2434
		2435	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2436	hv_store_ent (PL_custom_op_descs, slf,
		2437	newSVpv ("coro schedule like function", 0), 0);
		2438	}
		2439
1827	coroapi.ver = CORO_API_VERSION;	2440	coroapi.ver = CORO_API_VERSION;
1828	coroapi.rev = CORO_API_REVISION;	2441	coroapi.rev = CORO_API_REVISION;
		2442
1829	coroapi.transfer = api_transfer;	2443	coroapi.transfer = api_transfer;
		2444
		2445	coroapi.sv_state = SvSTATE_;
		2446	coroapi.execute_slf = api_execute_slf;
		2447	coroapi.prepare_nop = prepare_nop;
		2448	coroapi.prepare_schedule = prepare_schedule;
		2449	coroapi.prepare_cede = prepare_cede;
		2450	coroapi.prepare_cede_notself = prepare_cede_notself;
1830		2451
1831	{	2452	{
1832	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);	2453	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1833		2454
1834	if (!svp) croak ("Time::HiRes is required");	2455	if (!svp) croak ("Time::HiRes is required");
…		…
1867	av_push (coro->args, newSVsv (ST (i)));	2488	av_push (coro->args, newSVsv (ST (i)));
1868	}	2489	}
1869	OUTPUT:	2490	OUTPUT:
1870	RETVAL	2491	RETVAL
1871		2492
1872	# these not obviously related functions are all rolled into the same xs
1873	# function to increase chances that they all will call transfer with the same
1874	# stack offset
1875	void	2493	void
1876	_set_stacklevel (...)	2494	transfer (...)
1877	ALIAS:	2495	PROTOTYPE: $$
1878	Coro::State::transfer = 1	2496	CODE:
1879	Coro::schedule = 2	2497	CORO_EXECUTE_SLF_XS (slf_init_transfer);
1880	Coro::cede = 3
1881	Coro::cede_notself = 4
1882	CODE:
1883	{
1884	struct transfer_args ta;
1885
1886	PUTBACK;
1887	switch (ix)
1888	{
1889	case 0:
1890	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1891	ta.next = 0;
1892	break;
1893
1894	case 1:
1895	if (items != 2)
1896	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1897
1898	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1899	break;
1900
1901	case 2:
1902	prepare_schedule (aTHX_ &ta);
1903	break;
1904
1905	case 3:
1906	prepare_cede (aTHX_ &ta);
1907	break;
1908
1909	case 4:
1910	if (!prepare_cede_notself (aTHX_ &ta))
1911	XSRETURN_EMPTY;
1912
1913	break;
1914	}
1915	SPAGAIN;
1916
1917	BARRIER;
1918	PUTBACK;
1919	TRANSFER (ta, 0);
1920	SPAGAIN; /* might be the sp of a different coroutine now */
1921	/* be extra careful not to ever do anything after TRANSFER */
1922	}
1923		2498
1924	bool	2499	bool
1925	_destroy (SV *coro_sv)	2500	_destroy (SV *coro_sv)
1926	CODE:	2501	CODE:
1927	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2502	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1934	CODE:	2509	CODE:
1935	_exit (code);	2510	_exit (code);
1936		2511
1937	int	2512	int
1938	cctx_stacksize (int new_stacksize = 0)	2513	cctx_stacksize (int new_stacksize = 0)
		2514	PROTOTYPE: ;$
1939	CODE:	2515	CODE:
1940	RETVAL = cctx_stacksize;	2516	RETVAL = cctx_stacksize;
1941	if (new_stacksize)	2517	if (new_stacksize)
1942	{	2518	{
1943	cctx_stacksize = new_stacksize;	2519	cctx_stacksize = new_stacksize;
…		…
1946	OUTPUT:	2522	OUTPUT:
1947	RETVAL	2523	RETVAL
1948		2524
1949	int	2525	int
1950	cctx_max_idle (int max_idle = 0)	2526	cctx_max_idle (int max_idle = 0)
		2527	PROTOTYPE: ;$
1951	CODE:	2528	CODE:
1952	RETVAL = cctx_max_idle;	2529	RETVAL = cctx_max_idle;
1953	if (max_idle > 1)	2530	if (max_idle > 1)
1954	cctx_max_idle = max_idle;	2531	cctx_max_idle = max_idle;
1955	OUTPUT:	2532	OUTPUT:
1956	RETVAL	2533	RETVAL
1957		2534
1958	int	2535	int
1959	cctx_count ()	2536	cctx_count ()
		2537	PROTOTYPE:
1960	CODE:	2538	CODE:
1961	RETVAL = cctx_count;	2539	RETVAL = cctx_count;
1962	OUTPUT:	2540	OUTPUT:
1963	RETVAL	2541	RETVAL
1964		2542
1965	int	2543	int
1966	cctx_idle ()	2544	cctx_idle ()
		2545	PROTOTYPE:
1967	CODE:	2546	CODE:
1968	RETVAL = cctx_idle;	2547	RETVAL = cctx_idle;
1969	OUTPUT:	2548	OUTPUT:
1970	RETVAL	2549	RETVAL
1971		2550
1972	void	2551	void
1973	list ()	2552	list ()
		2553	PROTOTYPE:
1974	PPCODE:	2554	PPCODE:
1975	{	2555	{
1976	struct coro *coro;	2556	struct coro *coro;
1977	for (coro = coro_first; coro; coro = coro->next)	2557	for (coro = coro_first; coro; coro = coro->next)
1978	if (coro->hv)	2558	if (coro->hv)
…		…
2037	RETVAL = boolSV (coro->flags & ix);	2617	RETVAL = boolSV (coro->flags & ix);
2038	OUTPUT:	2618	OUTPUT:
2039	RETVAL	2619	RETVAL
2040		2620
2041	void	2621	void
		2622	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2623	PROTOTYPE: $;$
		2624	CODE:
		2625	{
		2626	struct coro *current = SvSTATE_current;
		2627	SV **throwp = self == current ? &CORO_THROW : &self->except;
		2628	SvREFCNT_dec (*throwp);
		2629	*throwp = SvOK (throw) ? newSVsv (throw) : 0;
		2630	}
		2631
		2632	void
2042	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2633	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		2634	PROTOTYPE: $;$
		2635	C_ARGS: aTHX_ coro, flags
2043		2636
2044	SV *	2637	SV *
2045	has_cctx (Coro::State coro)	2638	has_cctx (Coro::State coro)
2046	PROTOTYPE: $	2639	PROTOTYPE: $
2047	CODE:	2640	CODE:
…		…
2071	OUTPUT:	2664	OUTPUT:
2072	RETVAL	2665	RETVAL
2073		2666
2074	void	2667	void
2075	force_cctx ()	2668	force_cctx ()
		2669	PROTOTYPE:
2076	CODE:	2670	CODE:
2077	struct coro *coro = SvSTATE (coro_current);
2078	coro->cctx->idle_sp = 0;	2671	SvSTATE_current->cctx->idle_sp = 0;
2079		2672
2080	void	2673	void
2081	swap_defsv (Coro::State self)	2674	swap_defsv (Coro::State self)
2082	PROTOTYPE: $	2675	PROTOTYPE: $
2083	ALIAS:	2676	ALIAS:
2084	swap_defav = 1	2677	swap_defav = 1
2085	CODE:	2678	CODE:
2086	if (!self->slot)	2679	if (!self->slot)
2087	croak ("cannot swap state with coroutine that has no saved state");	2680	croak ("cannot swap state with coroutine that has no saved state,");
2088	else	2681	else
2089	{	2682	{
2090	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);	2683	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
2091	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;	2684	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
2092		2685
2093	SV tmp = src; src = dst; *dst = tmp;	2686	SV tmp = src; src = dst; *dst = tmp;
2094	}	2687	}
		2688
2095		2689
2096	MODULE = Coro::State PACKAGE = Coro	2690	MODULE = Coro::State PACKAGE = Coro
2097		2691
2098	BOOT:	2692	BOOT:
2099	{	2693	{
…		…
2117		2711
2118	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2712	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2119	coro_ready[i] = newAV ();	2713	coro_ready[i] = newAV ();
2120		2714
2121	{	2715	{
2122	SV *sv = perl_get_sv ("Coro::API", TRUE);	2716	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2123	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2124		2717
2125	coroapi.schedule = api_schedule;	2718	coroapi.schedule = api_schedule;
2126	coroapi.cede = api_cede;	2719	coroapi.cede = api_cede;
2127	coroapi.cede_notself = api_cede_notself;	2720	coroapi.cede_notself = api_cede_notself;
2128	coroapi.ready = api_ready;	2721	coroapi.ready = api_ready;
2129	coroapi.is_ready = api_is_ready;	2722	coroapi.is_ready = api_is_ready;
2130	coroapi.nready = &coro_nready;	2723	coroapi.nready = coro_nready;
2131	coroapi.current = coro_current;	2724	coroapi.current = coro_current;
2132		2725
2133	GCoroAPI = &coroapi;	2726	/GCoroAPI = &coroapi;/
2134	sv_setiv (sv, (IV)&coroapi);	2727	sv_setiv (sv, (IV)&coroapi);
2135	SvREADONLY_on (sv);	2728	SvREADONLY_on (sv);
2136	}	2729	}
2137	}	2730	}
		2731
		2732	void
		2733	schedule (...)
		2734	CODE:
		2735	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2736
		2737	void
		2738	cede (...)
		2739	CODE:
		2740	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2741
		2742	void
		2743	cede_notself (...)
		2744	CODE:
		2745	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2138		2746
2139	void	2747	void
2140	_set_current (SV *current)	2748	_set_current (SV *current)
2141	PROTOTYPE: $	2749	PROTOTYPE: $
2142	CODE:	2750	CODE:
…		…
2145		2753
2146	void	2754	void
2147	_set_readyhook (SV *hook)	2755	_set_readyhook (SV *hook)
2148	PROTOTYPE: $	2756	PROTOTYPE: $
2149	CODE:	2757	CODE:
2150	LOCK;
2151	SvREFCNT_dec (coro_readyhook);	2758	SvREFCNT_dec (coro_readyhook);
2152	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2759	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2153	UNLOCK;
2154		2760
2155	int	2761	int
2156	prio (Coro::State coro, int newprio = 0)	2762	prio (Coro::State coro, int newprio = 0)
		2763	PROTOTYPE: $;$
2157	ALIAS:	2764	ALIAS:
2158	nice = 1	2765	nice = 1
2159	CODE:	2766	CODE:
2160	{	2767	{
2161	RETVAL = coro->prio;	2768	RETVAL = coro->prio;
…		…
2176		2783
2177	SV *	2784	SV *
2178	ready (SV *self)	2785	ready (SV *self)
2179	PROTOTYPE: $	2786	PROTOTYPE: $
2180	CODE:	2787	CODE:
2181	RETVAL = boolSV (api_ready (self));	2788	RETVAL = boolSV (api_ready (aTHX_ self));
2182	OUTPUT:	2789	OUTPUT:
2183	RETVAL	2790	RETVAL
2184		2791
2185	int	2792	int
2186	nready (...)	2793	nready (...)
…		…
2188	CODE:	2795	CODE:
2189	RETVAL = coro_nready;	2796	RETVAL = coro_nready;
2190	OUTPUT:	2797	OUTPUT:
2191	RETVAL	2798	RETVAL
2192		2799
2193	void
2194	throw (Coro::State self, SV *throw = &PL_sv_undef)
2195	PROTOTYPE: $;$
2196	CODE:
2197	SvREFCNT_dec (self->throw);
2198	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2199
2200	# for async_pool speedup	2800	# for async_pool speedup
2201	void	2801	void
2202	_pool_1 (SV *cb)	2802	_pool_1 (SV *cb)
2203	CODE:	2803	CODE:
2204	{	2804	{
2205	struct coro *coro = SvSTATE (coro_current);
2206	HV hv = (HV )SvRV (coro_current);	2805	HV hv = (HV )SvRV (coro_current);
		2806	struct coro coro = SvSTATE_hv ((SV )hv);
2207	AV *defav = GvAV (PL_defgv);	2807	AV *defav = GvAV (PL_defgv);
2208	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2808	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2209	AV *invoke_av;	2809	AV *invoke_av;
2210	int i, len;	2810	int i, len;
2211		2811
…		…
2232	{	2832	{
2233	av_fill (defav, len - 1);	2833	av_fill (defav, len - 1);
2234	for (i = 0; i < len; ++i)	2834	for (i = 0; i < len; ++i)
2235	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));	2835	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2236	}	2836	}
2237
2238	SvREFCNT_dec (invoke);
2239	}	2837	}
2240		2838
2241	void	2839	void
2242	_pool_2 (SV *cb)	2840	_pool_2 (SV *cb)
2243	CODE:	2841	CODE:
2244	{	2842	{
2245	struct coro *coro = SvSTATE (coro_current);	2843	HV hv = (HV )SvRV (coro_current);
		2844	struct coro coro = SvSTATE_hv ((SV )hv);
2246		2845
2247	sv_setsv (cb, &PL_sv_undef);	2846	sv_setsv (cb, &PL_sv_undef);
2248		2847
2249	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;	2848	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
2250	coro->saved_deffh = 0;	2849	coro->saved_deffh = 0;
…		…
2257	SvREFCNT_dec (old);	2856	SvREFCNT_dec (old);
2258	croak ("\3async_pool terminate\2\n");	2857	croak ("\3async_pool terminate\2\n");
2259	}	2858	}
2260		2859
2261	av_clear (GvAV (PL_defgv));	2860	av_clear (GvAV (PL_defgv));
2262	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2861	hv_store (hv, "desc", sizeof ("desc") - 1,
2263	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2862	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2264		2863
2265	coro->prio = 0;	2864	coro->prio = 0;
2266		2865
2267	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2866	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2268	api_trace (coro_current, 0);	2867	api_trace (aTHX_ coro_current, 0);
2269		2868
2270	av_push (av_async_pool, newSVsv (coro_current));	2869	av_push (av_async_pool, newSVsv (coro_current));
2271	}	2870	}
2272		2871
2273	#if 0
2274		2872
2275	void	2873	MODULE = Coro::State PACKAGE = PerlIO::cede
2276	_generator_call (...)	2874
2277	PROTOTYPE: @	2875	BOOT:
2278	PPCODE:	2876	PerlIO_define_layer (aTHX_ &PerlIO_cede);
2279	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);	2877
2280	xxxx	2878
2281	abort ();	2879	MODULE = Coro::State PACKAGE = Coro::Semaphore
2282		2880
2283	SV *	2881	SV *
2284	gensub (SV *sub, ...)	2882	new (SV klass, SV count = 0)
2285	PROTOTYPE: &;@	2883	CODE:
2286	CODE:	2884	RETVAL = sv_bless (
2287	{	2885	coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
2288	struct coro *coro;	2886	GvSTASH (CvGV (cv))
2289	MAGIC *mg;	2887	);
2290	CV *xcv;
2291	CV ncv = (CV )newSV_type (SVt_PVCV);
2292	int i;
2293
2294	CvGV (ncv) = CvGV (cv);
2295	CvFILE (ncv) = CvFILE (cv);
2296
2297	Newz (0, coro, 1, struct coro);
2298	coro->args = newAV ();
2299	coro->flags = CF_NEW;
2300
2301	av_extend (coro->args, items - 1);
2302	for (i = 1; i < items; i++)
2303	av_push (coro->args, newSVsv (ST (i)));
2304
2305	CvISXSUB_on (ncv);
2306	CvXSUBANY (ncv).any_ptr = (void *)coro;
2307
2308	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2309
2310	CvXSUB (ncv) = CvXSUB (xcv);
2311	CvANON_on (ncv);
2312
2313	mg = sv_magicext ((SV )ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char )coro, 0);
2314	RETVAL = newRV_noinc ((SV *)ncv);
2315	}
2316	OUTPUT:	2888	OUTPUT:
2317	RETVAL	2889	RETVAL
2318		2890
2319	#endif	2891	# helper for Coro::Channel
		2892	SV *
		2893	_alloc (int count)
		2894	CODE:
		2895	RETVAL = coro_waitarray_new (aTHX_ count);
		2896	OUTPUT:
		2897	RETVAL
2320		2898
2321		2899	SV *
2322	MODULE = Coro::State PACKAGE = Coro::AIO	2900	count (SV *self)
		2901	CODE:
		2902	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2903	OUTPUT:
		2904	RETVAL
2323		2905
2324	void	2906	void
2325	_get_state (SV *self)	2907	up (SV *self, int adjust = 1)
2326	PPCODE:	2908	ALIAS:
2327	{	2909	adjust = 1
2328	AV *defav = GvAV (PL_defgv);	2910	CODE:
2329	AV *av = newAV ();	2911	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2330	int i;
2331	SV *data_sv = newSV (sizeof (struct io_state));
2332	struct io_state data = (struct io_state )SvPVX (data_sv);
2333	SvCUR_set (data_sv, sizeof (struct io_state));
2334	SvPOK_only (data_sv);
2335
2336	data->errorno = errno;
2337	data->laststype = PL_laststype;
2338	data->laststatval = PL_laststatval;
2339	data->statcache = PL_statcache;
2340
2341	av_extend (av, AvFILLp (defav) + 1 + 1);
2342
2343	for (i = 0; i <= AvFILLp (defav); ++i)
2344	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2345
2346	av_push (av, data_sv);
2347
2348	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2349
2350	api_ready (self);
2351	}
2352		2912
2353	void	2913	void
2354	_set_state (SV *state)	2914	down (SV *self)
2355	PROTOTYPE: $	2915	CODE:
		2916	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2917
		2918	void
		2919	wait (SV *self)
		2920	CODE:
		2921	CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
		2922
		2923	void
		2924	try (SV *self)
		2925	PPCODE:
		2926	{
		2927	AV av = (AV )SvRV (self);
		2928	SV *count_sv = AvARRAY (av)[0];
		2929	IV count = SvIVX (count_sv);
		2930
		2931	if (count > 0)
		2932	{
		2933	--count;
		2934	SvIVX (count_sv) = count;
		2935	XSRETURN_YES;
		2936	}
		2937	else
		2938	XSRETURN_NO;
		2939	}
		2940
		2941	void
		2942	waiters (SV *self)
		2943	PPCODE:
		2944	{
		2945	AV av = (AV )SvRV (self);
		2946	int wcount = AvFILLp (av) + 1 - 1;
		2947
		2948	if (GIMME_V == G_SCALAR)
		2949	XPUSHs (sv_2mortal (newSViv (wcount)));
		2950	else
		2951	{
		2952	int i;
		2953	EXTEND (SP, wcount);
		2954	for (i = 1; i <= wcount; ++i)
		2955	PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
		2956	}
		2957	}
		2958
		2959	MODULE = Coro::State PACKAGE = Coro::Signal
		2960
		2961	SV *
		2962	new (SV *klass)
2356	PPCODE:	2963	CODE:
		2964	RETVAL = sv_bless (
		2965	coro_waitarray_new (aTHX_ 0),
		2966	GvSTASH (CvGV (cv))
		2967	);
		2968	OUTPUT:
		2969	RETVAL
		2970
		2971	void
		2972	wait (SV *self)
		2973	CODE:
		2974	CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
		2975
		2976	void
		2977	broadcast (SV *self)
		2978	CODE:
2357	{	2979	{
2358	AV av = (AV )SvRV (state);	2980	AV av = (AV )SvRV (self);
2359	struct io_state data = (struct io_state )SvPVX (AvARRAY (av)[AvFILLp (av)]);	2981	coro_signal_wake (aTHX_ av, AvFILLp (av));
2360	int i;	2982	}
2361		2983
2362	errno = data->errorno;	2984	void
2363	PL_laststype = data->laststype;	2985	send (SV *self)
2364	PL_laststatval = data->laststatval;	2986	CODE:
2365	PL_statcache = data->statcache;	2987	{
		2988	AV av = (AV )SvRV (self);
2366		2989
2367	EXTEND (SP, AvFILLp (av));	2990	if (AvFILLp (av))
2368	for (i = 0; i < AvFILLp (av); ++i)	2991	coro_signal_wake (aTHX_ av, 1);
2369	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));	2992	else
		2993	SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2370	}	2994	}
		2995
		2996	IV
		2997	awaited (SV *self)
		2998	CODE:
		2999	RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
		3000	OUTPUT:
		3001	RETVAL
2371		3002
2372		3003
2373	MODULE = Coro::State PACKAGE = Coro::AnyEvent	3004	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2374		3005
2375	BOOT:	3006	BOOT:
2376	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	3007	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2377		3008
2378	SV *	3009	void
2379	_schedule (...)	3010	_schedule (...)
2380	PROTOTYPE: @
2381	CODE:	3011	CODE:
2382	{	3012	{
2383	static int incede;	3013	static int incede;
2384		3014
2385	api_cede_notself ();	3015	api_cede_notself (aTHX);
2386		3016
2387	++incede;	3017	++incede;
2388	while (coro_nready >= incede && api_cede ())	3018	while (coro_nready >= incede && api_cede (aTHX))
2389	;	3019	;
2390		3020
2391	sv_setsv (sv_activity, &PL_sv_undef);	3021	sv_setsv (sv_activity, &PL_sv_undef);
2392	if (coro_nready >= incede)	3022	if (coro_nready >= incede)
2393	{	3023	{
2394	PUSHMARK (SP);	3024	PUSHMARK (SP);
2395	PUTBACK;	3025	PUTBACK;
2396	call_pv ("Coro::AnyEvent::_activity", G_DISCARD \| G_EVAL);	3026	call_pv ("Coro::AnyEvent::_activity", G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
2397	SPAGAIN;
2398	}	3027	}
2399		3028
2400	--incede;	3029	--incede;
2401	}	3030	}
2402		3031
2403		3032
2404	MODULE = Coro::State PACKAGE = PerlIO::cede	3033	MODULE = Coro::State PACKAGE = Coro::AIO
2405		3034
2406	BOOT:	3035	void
2407	PerlIO_define_layer (aTHX_ &PerlIO_cede);	3036	_register (char target, char proto, SV *req)
		3037	CODE:
		3038	{
		3039	HV *st;
		3040	GV *gvp;
		3041	CV *req_cv = sv_2cv (req, &st, &gvp, 0);
		3042	/* newXSproto doesn't return the CV on 5.8 */
		3043	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
		3044	sv_setpv ((SV *)slf_cv, proto);
		3045	sv_magicext ((SV )slf_cv, (SV )req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
		3046	}
		3047

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Comparing Coro/Coro/State.xs (file contents): Revision 1.258 by root, Sun Nov 9 23:08:49 2008 UTC vs. Revision 1.301 by root, Wed Nov 19 02:41:31 2008 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.258 by root, Sun Nov 9 23:08:49 2008 UTC vs.
Revision 1.301 by root, Wed Nov 19 02:41:31 2008 UTC