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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.232 by root, Thu Apr 24 12:40:38 2008 UTC vs.
Revision 1.274 by root, Sat Nov 15 00:08:30 2008 UTC

…		…
4	#define PERL_EXT	4	#define PERL_EXT
5		5
6	#include "EXTERN.h"	6	#include "EXTERN.h"
7	#include "perl.h"	7	#include "perl.h"
8	#include "XSUB.h"	8	#include "XSUB.h"
		9	#include "perliol.h"
9		10
10	#include "patchlevel.h"	11	#include "patchlevel.h"
11		12
12	#include <stdio.h>	13	#include <stdio.h>
13	#include <errno.h>	14	#include <errno.h>
…		…
45	# define BOOT_PAGESIZE (void)0	46	# define BOOT_PAGESIZE (void)0
46	#endif	47	#endif
47		48
48	#if CORO_USE_VALGRIND	49	#if CORO_USE_VALGRIND
49	# include <valgrind/valgrind.h>	50	# include <valgrind/valgrind.h>
50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51	#else
52	# define REGISTER_STACK(cctx,start,end)
53	#endif	51	#endif
54		52
55	/* the maximum number of idle cctx that will be pooled */	53	/* the maximum number of idle cctx that will be pooled */
56	#define MAX_IDLE_CCTX 8	54	static int cctx_max_idle = 4;
57		55
58	#define PERL_VERSION_ATLEAST(a,b,c) \	56	#define PERL_VERSION_ATLEAST(a,b,c) \
59	(PERL_REVISION > (a) \	57	(PERL_REVISION > (a) \
60	|| (PERL_REVISION == (a) \	58	|| (PERL_REVISION == (a) \
61	&& (PERL_VERSION > (b) \	59	&& (PERL_VERSION > (b) \
…		…
80	# ifndef IS_PADCONST	78	# ifndef IS_PADCONST
81	# define IS_PADCONST(v) 0	79	# define IS_PADCONST(v) 0
82	# endif	80	# endif
83	#endif	81	#endif
84		82
		83	/* 5.11 */
		84	#ifndef CxHASARGS
		85	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		86	#endif
		87
		88	/* 5.10.0 */
		89	#ifndef SvREFCNT_inc_NN
		90	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		91	#endif
		92
85	/* 5.8.8 */	93	/* 5.8.8 */
86	#ifndef GV_NOTQUAL	94	#ifndef GV_NOTQUAL
87	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
88	#endif	96	#endif
89	#ifndef newSV	97	#ifndef newSV
90	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
91	#endif	99	#endif
92		100
93	/* 5.11 */
94	#ifndef CxHASARGS
95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96	#endif
97
98	/* 5.8.7 */	101	/* 5.8.7 */
99	#ifndef SvRV_set	102	#ifndef SvRV_set
100	# define SvRV_set(s,v) SvRV(s) = (v)	103	# define SvRV_set(s,v) SvRV(s) = (v)
101	#endif	104	#endif
102		105
…		…
113	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
114	#endif	117	#endif
115		118
116	/* 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
117	* portable way as possible. */	120	* portable way as possible. */
118	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
119	#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
120		126
121	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
122		128
123	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
124	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
127	#else	133	#else
128	# define attribute(x)	134	# define attribute(x)
129	# define BARRIER
130	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
131	#endif	137	#endif
132		138
133	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
134	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
135		141
136	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
137		143
138	#include "CoroAPI.h"	144	#include "CoroAPI.h"
139		145
140	#ifdef USE_ITHREADS	146	#ifdef USE_ITHREADS
		147
141	static perl_mutex coro_mutex;	148	static perl_mutex coro_lock;
142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
		151	# if CORO_PTHREAD
		152	static void *coro_thx;
		153	# endif
		154
144	#else	155	#else
		156
145	# define LOCK (void)0	157	# define LOCK (void)0
146	# define UNLOCK (void)0	158	# define UNLOCK (void)0
		159
147	#endif	160	#endif
		161
		162	# undef LOCK
		163	# define LOCK (void)0
		164	# undef UNLOCK
		165	# define UNLOCK (void)0
148		166
149	/* helper storage struct for Coro::AIO */	167	/* helper storage struct for Coro::AIO */
150	struct io_state	168	struct io_state
151	{	169	{
		170	AV *res;
152	int errorno;	171	int errorno;
153	I32 laststype;	172	I32 laststype; /* U16 in 5.10.0 */
154	int laststatval;	173	int laststatval;
155	Stat_t statcache;	174	Stat_t statcache;
156	};	175	};
157		176
		177	static double (*nvtime)(); /* so why doesn't it take void? */
		178
		179	static U32 cctx_gen;
158	static size_t coro_stacksize = CORO_STACKSIZE;	180	static size_t cctx_stacksize = CORO_STACKSIZE;
159	static struct CoroAPI coroapi;	181	static struct CoroAPI coroapi;
160	static AV *main_mainstack; /* used to differentiate between $main and others */	182	static AV *main_mainstack; /* used to differentiate between $main and others */
161	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
162	static HV *coro_state_stash, *coro_stash;	184	static HV *coro_state_stash, *coro_stash;
163	static volatile SV *coro_mortal; /* will be freed after next transfer */	185	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
		186	static volatile struct coro *transfer_next;
164		187
165	static GV *irsgv; /* $/ */	188	static GV *irsgv; /* $/ */
166	static GV *stdoutgv; /* *STDOUT */	189	static GV *stdoutgv; /* *STDOUT */
167	static SV *rv_diehook;	190	static SV *rv_diehook;
168	static SV *rv_warnhook;	191	static SV *rv_warnhook;
…		…
170		193
171	/* async_pool helper stuff */	194	/* async_pool helper stuff */
172	static SV *sv_pool_rss;	195	static SV *sv_pool_rss;
173	static SV *sv_pool_size;	196	static SV *sv_pool_size;
174	static AV *av_async_pool;	197	static AV *av_async_pool;
		198
		199	/* Coro::AnyEvent */
		200	static SV *sv_activity;
175		201
176	static struct coro_cctx *cctx_first;	202	static struct coro_cctx *cctx_first;
177	static int cctx_count, cctx_idle;	203	static int cctx_count, cctx_idle;
178		204
179	enum {	205	enum {
…		…
184	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
185	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186	};	212	};
187		213
188	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
189	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
190	struct coro_cctx *next;	217	struct coro_cctx *next;
191		218
192	/* the stack */	219	/* the stack */
193	void *sptr;	220	void *sptr;
194	size_t ssize;	221	size_t ssize;
…		…
197	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	224	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
198	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	225	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
199	JMPENV *top_env;	226	JMPENV *top_env;
200	coro_context cctx;	227	coro_context cctx;
201		228
		229	U32 gen;
202	#if CORO_USE_VALGRIND	230	#if CORO_USE_VALGRIND
203	int valgrind_id;	231	int valgrind_id;
204	#endif	232	#endif
205	unsigned char flags;	233	unsigned char flags;
206	} coro_cctx;	234	} coro_cctx;
…		…
211	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
212	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
213	};	241	};
214		242
215	/* the structure where most of the perl state is stored, overlaid on the cxstack */	243	/* the structure where most of the perl state is stored, overlaid on the cxstack */
216	typedef struct {	244	typedef struct
		245	{
217	SV *defsv;	246	SV *defsv;
218	AV *defav;	247	AV *defav;
219	SV *errsv;	248	SV *errsv;
220	SV *irsgv;	249	SV *irsgv;
221	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
225		254
226	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	255	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
227		256
228	/* this is a structure representing a perl-level coroutine */	257	/* this is a structure representing a perl-level coroutine */
229	struct coro {	258	struct coro {
230	/* the c coroutine allocated to this perl coroutine, if any */	259	/* the C coroutine allocated to this perl coroutine, if any */
231	coro_cctx *cctx;	260	coro_cctx *cctx;
232		261
233	/* process data */	262	/* process data */
		263	struct CoroSLF slf_frame; /* saved slf frame */
234	AV *mainstack;	264	AV *mainstack;
235	perl_slots *slot; /* basically the saved sp */	265	perl_slots *slot; /* basically the saved sp */
236		266
237	AV *args; /* data associated with this coroutine (initial args) */	267	AV *args; /* data associated with this coroutine (initial args) */
238	int refcnt; /* coroutines are refcounted, yes */	268	int refcnt; /* coroutines are refcounted, yes */
…		…
253	struct coro *next, *prev;	283	struct coro *next, *prev;
254	};	284	};
255		285
256	typedef struct coro *Coro__State;	286	typedef struct coro *Coro__State;
257	typedef struct coro *Coro__State_or_hashref;	287	typedef struct coro *Coro__State_or_hashref;
		288
		289	static struct CoroSLF slf_frame; /* the current slf frame */
258		290
259	/** Coro ********************************************************************/	291	/** Coro ********************************************************************/
260		292
261	#define PRIO_MAX 3	293	#define PRIO_MAX 3
262	#define PRIO_HIGH 1	294	#define PRIO_HIGH 1
…		…
265	#define PRIO_IDLE -3	297	#define PRIO_IDLE -3
266	#define PRIO_MIN -4	298	#define PRIO_MIN -4
267		299
268	/* for Coro.pm */	300	/* for Coro.pm */
269	static SV *coro_current;	301	static SV *coro_current;
		302	static SV *coro_readyhook;
270	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
271	static int coro_nready;
272	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
273		306
274	/** lowlevel stuff **********************************************************/	307	/** lowlevel stuff **********************************************************/
275		308
276	static SV *	309	static SV *
277	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
317	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	350	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
318	#endif	351	#endif
319	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	352	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
320	--AvFILLp (padlist);	353	--AvFILLp (padlist);
321		354
322	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	355	av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
323	av_store (newpadlist, 1, (SV *)newpad);	356	av_store (newpadlist, 1, (SV *)newpad);
324		357
325	return newpadlist;	358	return newpadlist;
326	}	359	}
327		360
…		…
357		390
358	/* casting is fun. */	391	/* casting is fun. */
359	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	392	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
360	free_padlist (aTHX_ padlist);	393	free_padlist (aTHX_ padlist);
361		394
		395	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
		396
362	return 0;	397	return 0;
363	}	398	}
364		399
365	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	400	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
366	#define CORO_MAGIC_type_state PERL_MAGIC_ext	401	#define CORO_MAGIC_type_state PERL_MAGIC_ext
…		…
368	static MGVTBL coro_cv_vtbl = {	403	static MGVTBL coro_cv_vtbl = {
369	0, 0, 0, 0,	404	0, 0, 0, 0,
370	coro_cv_free	405	coro_cv_free
371	};	406	};
372		407
373	#define CORO_MAGIC(sv,type) \	408	#define CORO_MAGIC(sv, type) \
374	SvMAGIC (sv) \	409	SvMAGIC (sv) \
375	? SvMAGIC (sv)->mg_type == type \	410	? SvMAGIC (sv)->mg_type == type \
376	? SvMAGIC (sv) \	411	? SvMAGIC (sv) \
377	: mg_find (sv, type) \	412	: mg_find (sv, type) \
378	: 0	413	: 0
379		414
380	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	415	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
381	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	416	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
382		417
383	static struct coro *	418	INLINE struct coro *
384	SvSTATE_ (pTHX_ SV *coro)	419	SvSTATE_ (pTHX_ SV *coro)
385	{	420	{
386	HV *stash;	421	HV *stash;
387	MAGIC *mg;	422	MAGIC *mg;
388		423
…		…
416	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))	451	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
417	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	452	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
418	else	453	else
419	{	454	{
420	#if CORO_PREFER_PERL_FUNCTIONS	455	#if CORO_PREFER_PERL_FUNCTIONS
421	/* this is probably cleaner, but also slower? */	456	/* this is probably cleaner? but also slower! */
		457	/* in practise, it seems to be less stable */
422	CV *cp = Perl_cv_clone (cv);	458	CV *cp = Perl_cv_clone (cv);
423	CvPADLIST (cv) = CvPADLIST (cp);	459	CvPADLIST (cv) = CvPADLIST (cp);
424	CvPADLIST (cp) = 0;	460	CvPADLIST (cp) = 0;
425	SvREFCNT_dec (cp);	461	SvREFCNT_dec (cp);
426	#else	462	#else
…		…
478	CvPADLIST (cv) = (AV *)POPs;	514	CvPADLIST (cv) = (AV *)POPs;
479	}	515	}
480		516
481	PUTBACK;	517	PUTBACK;
482	}	518	}
		519
		520	slf_frame = c->slf_frame;
483	}	521	}
484		522
485	static void	523	static void
486	save_perl (pTHX_ Coro__State c)	524	save_perl (pTHX_ Coro__State c)
487	{	525	{
		526	c->slf_frame = slf_frame;
		527
488	{	528	{
489	dSP;	529	dSP;
490	I32 cxix = cxstack_ix;	530	I32 cxix = cxstack_ix;
491	PERL_CONTEXT *ccstk = cxstack;	531	PERL_CONTEXT *ccstk = cxstack;
492	PERL_SI *top_si = PL_curstackinfo;	532	PERL_SI *top_si = PL_curstackinfo;
…		…
510		550
511	if (expect_true (CvDEPTH (cv)))	551	if (expect_true (CvDEPTH (cv)))
512	{	552	{
513	EXTEND (SP, 3);	553	EXTEND (SP, 3);
514	PUSHs ((SV *)CvPADLIST (cv));	554	PUSHs ((SV *)CvPADLIST (cv));
515	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	555	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
516	PUSHs ((SV *)cv);	556	PUSHs ((SV *)cv);
517		557
518	CvDEPTH (cv) = 0;	558	CvDEPTH (cv) = 0;
519	get_padlist (aTHX_ cv);	559	get_padlist (aTHX_ cv);
520	}	560	}
…		…
559	#undef VAR	599	#undef VAR
560	}	600	}
561	}	601	}
562		602
563	/*	603	/*
564	* allocate various perl stacks. This is an exact copy	604	* allocate various perl stacks. This is almost an exact copy
565	* of perl.c:init_stacks, except that it uses less memory	605	* of perl.c:init_stacks, except that it uses less memory
566	* on the (sometimes correct) assumption that coroutines do	606	* on the (sometimes correct) assumption that coroutines do
567	* not usually need a lot of stackspace.	607	* not usually need a lot of stackspace.
568	*/	608	*/
569	#if CORO_PREFER_PERL_FUNCTIONS	609	#if CORO_PREFER_PERL_FUNCTIONS
…		…
612		652
613	/*	653	/*
614	* destroy the stacks, the callchain etc...	654	* destroy the stacks, the callchain etc...
615	*/	655	*/
616	static void	656	static void
617	coro_destroy_stacks (pTHX)	657	coro_destruct_stacks (pTHX)
618	{	658	{
619	while (PL_curstackinfo->si_next)	659	while (PL_curstackinfo->si_next)
620	PL_curstackinfo = PL_curstackinfo->si_next;	660	PL_curstackinfo = PL_curstackinfo->si_next;
621		661
622	while (PL_curstackinfo)	662	while (PL_curstackinfo)
…		…
659	#undef VAR	699	#undef VAR
660	}	700	}
661	else	701	else
662	slot = coro->slot;	702	slot = coro->slot;
663		703
		704	if (slot)
		705	{
664	rss += sizeof (slot->curstackinfo);	706	rss += sizeof (slot->curstackinfo);
665	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	707	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
666	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);	708	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
667	rss += slot->tmps_max * sizeof (SV *);	709	rss += slot->tmps_max * sizeof (SV *);
668	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);	710	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
669	rss += slot->scopestack_max * sizeof (I32);	711	rss += slot->scopestack_max * sizeof (I32);
670	rss += slot->savestack_max * sizeof (ANY);	712	rss += slot->savestack_max * sizeof (ANY);
671		713
672	#if !PERL_VERSION_ATLEAST (5,10,0)	714	#if !PERL_VERSION_ATLEAST (5,10,0)
673	rss += slot->retstack_max * sizeof (OP *);	715	rss += slot->retstack_max * sizeof (OP *);
674	#endif	716	#endif
		717	}
675	}	718	}
676		719
677	return rss;	720	return rss;
678	}	721	}
679		722
680	/** coroutine stack handling ************************************************/	723	/** coroutine stack handling ************************************************/
681		724
682	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);	725	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
683	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);	726	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		727	static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
		728
		729	/* apparently < 5.8.8 */
		730	#ifndef MgPV_nolen_const
		731	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		732	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
		733	(const char*)(mg)->mg_ptr)
		734	#endif
684		735
685	/*	736	/*
686	* This overrides the default magic get method of %SIG elements.	737	* This overrides the default magic get method of %SIG elements.
687	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook	738	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
688	* and instead of tryign to save and restore the hash elements, we just provide	739	* and instead of tryign to save and restore the hash elements, we just provide
…		…
696	{	747	{
697	const char *s = MgPV_nolen_const (mg);	748	const char *s = MgPV_nolen_const (mg);
698		749
699	if (*s == '_')	750	if (*s == '_')
700	{	751	{
701	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;	752	SV **svp = 0;
702	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;	753
		754	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		755	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		756
		757	if (svp)
		758	{
		759	sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
		760	return 0;
		761	}
703	}	762	}
704		763
705	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;	764	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		765	}
		766
		767	static int
		768	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		769	{
		770	const char *s = MgPV_nolen_const (mg);
		771
		772	if (*s == '_')
		773	{
		774	SV **svp = 0;
		775
		776	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		777	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		778
		779	if (svp)
		780	{
		781	SV *old = *svp;
		782	*svp = 0;
		783	SvREFCNT_dec (old);
		784	return 0;
		785	}
		786	}
		787
		788	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
706	}	789	}
707		790
708	static int	791	static int
709	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)	792	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
710	{	793	{
…		…
725	return 0;	808	return 0;
726	}	809	}
727	}	810	}
728		811
729	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		813	}
		814
		815	static void
		816	prepare_nop (aTHX_ struct coro_transfer_args *ta)
		817	{
		818	/* kind of mega-hacky, but works */
		819	ta->next = ta->prev = (struct coro *)ta;
		820	}
		821
		822	static int
		823	slf_check_nop (aTHX)
		824	{
		825	return 0;
730	}	826	}
731		827
732	static void	828	static void
733	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
734	{	830	{
…		…
757	GvSV (PL_defgv) = newSV (0);	853	GvSV (PL_defgv) = newSV (0);
758	GvAV (PL_defgv) = coro->args; coro->args = 0;	854	GvAV (PL_defgv) = coro->args; coro->args = 0;
759	GvSV (PL_errgv) = newSV (0);	855	GvSV (PL_errgv) = newSV (0);
760	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);	856	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
761	PL_rs = newSVsv (GvSV (irsgv));	857	PL_rs = newSVsv (GvSV (irsgv));
762	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);	858	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
763		859
764	{	860	{
765	dSP;	861	dSP;
766	LOGOP myop;	862	UNOP myop;
767		863
768	Zero (&myop, 1, LOGOP);	864	Zero (&myop, 1, UNOP);
769	myop.op_next = Nullop;	865	myop.op_next = Nullop;
770	myop.op_flags = OPf_WANT_VOID;	866	myop.op_flags = OPf_WANT_VOID;
771		867
772	PUSHMARK (SP);	868	PUSHMARK (SP);
773	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
776	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
777	SPAGAIN;	873	SPAGAIN;
778	}	874	}
779		875
780	/* this newly created coroutine might be run on an existing cctx which most	876	/* this newly created coroutine might be run on an existing cctx which most
781	* likely was suspended in set_stacklevel, called from entersub.	877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
782	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
783	* so we ENTER here for symmetry
784	*/	878	*/
785	ENTER;	879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		880	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
786	}	881	}
787		882
788	static void	883	static void
789	coro_destroy (pTHX_ struct coro *coro)	884	coro_destruct (pTHX_ struct coro *coro)
790	{	885	{
791	if (!IN_DESTRUCT)	886	if (!IN_DESTRUCT)
792	{	887	{
793	/* restore all saved variables and stuff */	888	/* restore all saved variables and stuff */
794	LEAVE_SCOPE (0);	889	LEAVE_SCOPE (0);
…		…
816	SvREFCNT_dec (PL_warnhook);	911	SvREFCNT_dec (PL_warnhook);
817		912
818	SvREFCNT_dec (coro->saved_deffh);	913	SvREFCNT_dec (coro->saved_deffh);
819	SvREFCNT_dec (coro->throw);	914	SvREFCNT_dec (coro->throw);
820		915
821	coro_destroy_stacks (aTHX);	916	coro_destruct_stacks (aTHX);
822	}	917	}
823		918
824	static void	919	INLINE void
825	free_coro_mortal (pTHX)	920	free_coro_mortal (pTHX)
826	{	921	{
827	if (expect_true (coro_mortal))	922	if (expect_true (coro_mortal))
828	{	923	{
829	SvREFCNT_dec (coro_mortal);	924	SvREFCNT_dec (coro_mortal);
…		…
863	: cx->blk_gimme == G_SCALAR ? bot + 1	958	: cx->blk_gimme == G_SCALAR ? bot + 1
864	: bot;	959	: bot;
865		960
866	av_extend (av, top - bot);	961	av_extend (av, top - bot);
867	while (bot < top)	962	while (bot < top)
868	av_push (av, SvREFCNT_inc (*bot++));	963	av_push (av, SvREFCNT_inc_NN (*bot++));
869		964
870	PL_runops = RUNOPS_DEFAULT;	965	PL_runops = RUNOPS_DEFAULT;
871	ENTER;	966	ENTER;
872	SAVETMPS;	967	SAVETMPS;
873	EXTEND (SP, 3);	968	EXTEND (SP, 3);
…		…
953		1048
954	TAINT_NOT;	1049	TAINT_NOT;
955	return 0;	1050	return 0;
956	}	1051	}
957		1052
		1053	static void
		1054	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
		1055	{
		1056	ta->prev = (struct coro *)cctx;
		1057	ta->next = 0;
		1058	}
		1059
958	/* inject a fake call to Coro::State::_cctx_init into the execution */	1060	/* inject a fake call to Coro::State::_cctx_init into the execution */
959	/* _cctx_init should be careful, as it could be called at almost any time */	1061	/* _cctx_init should be careful, as it could be called at almost any time */
960	/* during execution of a perl program */	1062	/* during execution of a perl program */
		1063	/* also initialises PL_top_env */
961	static void NOINLINE	1064	static void NOINLINE
962	cctx_prepare (pTHX_ coro_cctx *cctx)	1065	cctx_prepare (pTHX_ coro_cctx *cctx)
963	{	1066	{
964	dSP;	1067	dSP;
965	LOGOP myop;	1068	UNOP myop;
966		1069
967	PL_top_env = &PL_start_env;	1070	PL_top_env = &PL_start_env;
968		1071
969	if (cctx->flags & CC_TRACE)	1072	if (cctx->flags & CC_TRACE)
970	PL_runops = runops_trace;	1073	PL_runops = runops_trace;
971		1074
972	Zero (&myop, 1, LOGOP);	1075	Zero (&myop, 1, UNOP);
973	myop.op_next = PL_op;	1076	myop.op_next = PL_op;
974	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1077	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
975		1078
976	PUSHMARK (SP);	1079	PUSHMARK (SP);
977	EXTEND (SP, 2);	1080	EXTEND (SP, 2);
978	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
979	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
980	PUTBACK;	1083	PUTBACK;
981	PL_op = (OP *)&myop;	1084	PL_op = (OP *)&myop;
982	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
983	SPAGAIN;	1086	SPAGAIN;
984	}	1087	}
985		1088
		1089	/* the tail of transfer: execute stuff we can only do after a transfer */
		1090	INLINE void
		1091	transfer_tail (pTHX)
		1092	{
		1093	struct coro *next = (struct coro *)transfer_next;
		1094	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
		1095	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
		1096
		1097	free_coro_mortal (aTHX);
		1098	UNLOCK;
		1099
		1100	if (expect_false (next->throw))
		1101	{
		1102	SV *exception = sv_2mortal (next->throw);
		1103
		1104	next->throw = 0;
		1105	sv_setsv (ERRSV, exception);
		1106	croak (0);
		1107	}
		1108	}
		1109
986	/*	1110	/*
987	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
988	*/	1112	*/
989	static void	1113	static void
990	cctx_run (void *arg)	1114	cctx_run (void *arg)
991	{	1115	{
		1116	#ifdef USE_ITHREADS
		1117	# if CORO_PTHREAD
		1118	PERL_SET_CONTEXT (coro_thx);
		1119	# endif
		1120	#endif
		1121	{
992	dTHX;	1122	dTHX;
993		1123
994	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1124	/* normally we would need to skip the entersub here */
995	UNLOCK;	1125	/* not doing so will re-execute it, which is exactly what we want */
996
997	/* we now skip the entersub that lead to transfer() */
998	PL_op = PL_op->op_next;	1126	/* PL_nop = PL_nop->op_next */
999		1127
1000	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1001	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1002		1130
		1131	/* cctx_run is the alternative tail of transfer() */
		1132	/* TODO: throwing an exception here might be deadly, VERIFY */
		1133	transfer_tail (aTHX);
		1134
1003	/* somebody or something will hit me for both perl_run and PL_restartop */	1135	/* somebody or something will hit me for both perl_run and PL_restartop */
1004	PL_restartop = PL_op;	1136	PL_restartop = PL_op;
1005	perl_run (PL_curinterp);	1137	perl_run (PL_curinterp);
1006		1138
1007	/*	1139	/*
1008	* If perl-run returns we assume exit() was being called or the coro	1140	* If perl-run returns we assume exit() was being called or the coro
1009	* fell off the end, which seems to be the only valid (non-bug)	1141	* fell off the end, which seems to be the only valid (non-bug)
1010	* reason for perl_run to return. We try to exit by jumping to the	1142	* reason for perl_run to return. We try to exit by jumping to the
1011	* bootstrap-time "top" top_env, as we cannot restore the "main"	1143	* bootstrap-time "top" top_env, as we cannot restore the "main"
1012	* coroutine as Coro has no such concept	1144	* coroutine as Coro has no such concept
1013	*/	1145	*/
1014	PL_top_env = main_top_env;	1146	PL_top_env = main_top_env;
1015	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */	1147	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1148	}
1016	}	1149	}
1017		1150
1018	static coro_cctx *	1151	static coro_cctx *
1019	cctx_new ()	1152	cctx_new ()
1020	{	1153	{
1021	coro_cctx *cctx;	1154	coro_cctx *cctx;
		1155
		1156	++cctx_count;
		1157	New (0, cctx, 1, coro_cctx);
		1158
		1159	cctx->gen = cctx_gen;
		1160	cctx->flags = 0;
		1161	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1162
		1163	return cctx;
		1164	}
		1165
		1166	/* create a new cctx only suitable as source */
		1167	static coro_cctx *
		1168	cctx_new_empty ()
		1169	{
		1170	coro_cctx *cctx = cctx_new ();
		1171
		1172	cctx->sptr = 0;
		1173	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1174
		1175	return cctx;
		1176	}
		1177
		1178	/* create a new cctx suitable as destination/running a perl interpreter */
		1179	static coro_cctx *
		1180	cctx_new_run ()
		1181	{
		1182	coro_cctx *cctx = cctx_new ();
1022	void *stack_start;	1183	void *stack_start;
1023	size_t stack_size;	1184	size_t stack_size;
1024		1185
1025	++cctx_count;
1026
1027	Newz (0, cctx, 1, coro_cctx);
1028
1029	#if HAVE_MMAP	1186	#if HAVE_MMAP
1030	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1187	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1031	/* mmap supposedly does allocate-on-write for us */	1188	/* mmap supposedly does allocate-on-write for us */
1032	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1189	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1033		1190
1034	if (cctx->sptr != (void *)-1)	1191	if (cctx->sptr != (void *)-1)
1035	{	1192	{
1036	# if CORO_STACKGUARD	1193	#if CORO_STACKGUARD
1037	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1194	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1038	# endif	1195	#endif
1039	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1196	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1040	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1197	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1041	cctx->flags |= CC_MAPPED;	1198	cctx->flags |= CC_MAPPED;
1042	}	1199	}
1043	else	1200	else
1044	#endif	1201	#endif
1045	{	1202	{
1046	cctx->ssize = coro_stacksize * (long)sizeof (long);	1203	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1047	New (0, cctx->sptr, coro_stacksize, long);	1204	New (0, cctx->sptr, cctx_stacksize, long);
1048		1205
1049	if (!cctx->sptr)	1206	if (!cctx->sptr)
1050	{	1207	{
1051	perror ("FATAL: unable to allocate stack for coroutine");	1208	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1052	_exit (EXIT_FAILURE);	1209	_exit (EXIT_FAILURE);
1053	}	1210	}
1054		1211
1055	stack_start = cctx->sptr;	1212	stack_start = cctx->sptr;
1056	stack_size = cctx->ssize;	1213	stack_size = cctx->ssize;
1057	}	1214	}
1058		1215
1059	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1216	#if CORO_USE_VALGRIND
		1217	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
		1218	#endif
		1219
1060	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1220	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1061		1221
1062	return cctx;	1222	return cctx;
1063	}	1223	}
1064		1224
…		…
1067	{	1227	{
1068	if (!cctx)	1228	if (!cctx)
1069	return;	1229	return;
1070		1230
1071	--cctx_count;	1231	--cctx_count;
		1232	coro_destroy (&cctx->cctx);
1072		1233
		1234	/* coro_transfer creates new, empty cctx's */
		1235	if (cctx->sptr)
		1236	{
1073	#if CORO_USE_VALGRIND	1237	#if CORO_USE_VALGRIND
1074	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1238	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1075	#endif	1239	#endif
1076		1240
1077	#if HAVE_MMAP	1241	#if HAVE_MMAP
1078	if (cctx->flags & CC_MAPPED)	1242	if (cctx->flags & CC_MAPPED)
1079	munmap (cctx->sptr, cctx->ssize);	1243	munmap (cctx->sptr, cctx->ssize);
1080	else	1244	else
1081	#endif	1245	#endif
1082	Safefree (cctx->sptr);	1246	Safefree (cctx->sptr);
		1247	}
1083		1248
1084	Safefree (cctx);	1249	Safefree (cctx);
1085	}	1250	}
1086		1251
1087	/* wether this cctx should be destructed */	1252	/* wether this cctx should be destructed */
1088	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))	1253	#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1089		1254
1090	static coro_cctx *	1255	static coro_cctx *
1091	cctx_get (pTHX)	1256	cctx_get (pTHX)
1092	{	1257	{
1093	while (expect_true (cctx_first))	1258	while (expect_true (cctx_first))
…		…
1100	return cctx;	1265	return cctx;
1101		1266
1102	cctx_destroy (cctx);	1267	cctx_destroy (cctx);
1103	}	1268	}
1104		1269
1105	return cctx_new ();	1270	return cctx_new_run ();
1106	}	1271	}
1107		1272
1108	static void	1273	static void
1109	cctx_put (coro_cctx *cctx)	1274	cctx_put (coro_cctx *cctx)
1110	{	1275	{
		1276	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
		1277
1111	/* free another cctx if overlimit */	1278	/* free another cctx if overlimit */
1112	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1279	if (expect_false (cctx_idle >= cctx_max_idle))
1113	{	1280	{
1114	coro_cctx *first = cctx_first;	1281	coro_cctx *first = cctx_first;
1115	cctx_first = first->next;	1282	cctx_first = first->next;
1116	--cctx_idle;	1283	--cctx_idle;
1117		1284
…		…
1129	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1296	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1130	{	1297	{
1131	if (expect_true (prev != next))	1298	if (expect_true (prev != next))
1132	{	1299	{
1133	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1300	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1134	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1301	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1135		1302
1136	if (expect_false (next->flags & CF_RUNNING))	1303	if (expect_false (next->flags & CF_RUNNING))
1137	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1304	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1138		1305
1139	if (expect_false (next->flags & CF_DESTROYED))	1306	if (expect_false (next->flags & CF_DESTROYED))
1140	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1307	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1141		1308
1142	#if !PERL_VERSION_ATLEAST (5,10,0)	1309	#if !PERL_VERSION_ATLEAST (5,10,0)
1143	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1310	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1144	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1311	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1145	#endif	1312	#endif
1146	}	1313	}
1147	}	1314	}
1148		1315
1149	/* always use the TRANSFER macro */	1316	/* always use the TRANSFER macro */
1150	static void NOINLINE	1317	static void NOINLINE
1151	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1318	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1152	{	1319	{
1153	dSTACKLEVEL;	1320	dSTACKLEVEL;
1154	static volatile int has_throw;
1155		1321
1156	/* sometimes transfer is only called to set idle_sp */	1322	/* sometimes transfer is only called to set idle_sp */
1157	if (expect_false (!next))	1323	if (expect_false (!next))
1158	{	1324	{
1159	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1325	((coro_cctx *)prev)->idle_sp = stacklevel;
1160	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1326	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1161	}	1327	}
1162	else if (expect_true (prev != next))	1328	else if (expect_true (prev != next))
1163	{	1329	{
1164	coro_cctx *prev__cctx;	1330	coro_cctx *prev__cctx;
1165		1331
1166	if (expect_false (prev->flags & CF_NEW))	1332	if (expect_false (prev->flags & CF_NEW))
1167	{	1333	{
1168	/* create a new empty context */	1334	/* create a new empty/source context */
1169	Newz (0, prev->cctx, 1, coro_cctx);	1335	prev->cctx = cctx_new_empty ();
1170	prev->flags &= ~CF_NEW;	1336	prev->flags &= ~CF_NEW;
1171	prev->flags |= CF_RUNNING;	1337	prev->flags |= CF_RUNNING;
1172	}	1338	}
1173		1339
1174	prev->flags &= ~CF_RUNNING;	1340	prev->flags &= ~CF_RUNNING;
…		…
1189	else	1355	else
1190	load_perl (aTHX_ next);	1356	load_perl (aTHX_ next);
1191		1357
1192	prev__cctx = prev->cctx;	1358	prev__cctx = prev->cctx;
1193		1359
1194	/* possibly "free" the cctx */	1360	/* possibly untie and reuse the cctx */
1195	if (expect_true (	1361	if (expect_true (
1196	prev__cctx->idle_sp == STACKLEVEL	1362	prev__cctx->idle_sp == stacklevel
1197	&& !(prev__cctx->flags & CC_TRACE)	1363	&& !(prev__cctx->flags & CC_TRACE)
1198	&& !force_cctx	1364	&& !force_cctx
1199	))	1365	))
1200	{	1366	{
1201	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1367	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1202	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1368	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1203		1369
1204	prev->cctx = 0;	1370	prev->cctx = 0;
1205		1371
1206	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1372	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1207	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1373	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1215	++next->usecount;	1381	++next->usecount;
1216		1382
1217	if (expect_true (!next->cctx))	1383	if (expect_true (!next->cctx))
1218	next->cctx = cctx_get (aTHX);	1384	next->cctx = cctx_get (aTHX);
1219		1385
1220	has_throw = !!next->throw;	1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1387	transfer_next = next;
1221		1388
1222	if (expect_false (prev__cctx != next->cctx))	1389	if (expect_false (prev__cctx != next->cctx))
1223	{	1390	{
1224	prev__cctx->top_env = PL_top_env;	1391	prev__cctx->top_env = PL_top_env;
1225	PL_top_env = next->cctx->top_env;	1392	PL_top_env = next->cctx->top_env;
1226	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1227	}	1394	}
1228		1395
1229	free_coro_mortal (aTHX);	1396	transfer_tail (aTHX);
1230	UNLOCK;
1231
1232	if (expect_false (has_throw))
1233	{
1234	struct coro *coro = SvSTATE (coro_current);
1235
1236	if (coro->throw)
1237	{
1238	SV *exception = coro->throw;
1239	coro->throw = 0;
1240	sv_setsv (ERRSV, exception);
1241	croak (0);
1242	}
1243	}
1244	}	1397	}
1245	}	1398	}
1246
1247	struct transfer_args
1248	{
1249	struct coro *prev, *next;
1250	};
1251		1399
1252	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1400	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1253	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1401	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1254		1402
1255	/** high level stuff ********************************************************/	1403	/** high level stuff ********************************************************/
…		…
1275		1423
1276	if (coro->mainstack && coro->mainstack != main_mainstack)	1424	if (coro->mainstack && coro->mainstack != main_mainstack)
1277	{	1425	{
1278	struct coro temp;	1426	struct coro temp;
1279		1427
1280	if (coro->flags & CF_RUNNING)	1428	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1281	croak ("FATAL: tried to destroy currently running coroutine");
1282		1429
1283	save_perl (aTHX_ &temp);	1430	save_perl (aTHX_ &temp);
1284	load_perl (aTHX_ coro);	1431	load_perl (aTHX_ coro);
1285		1432
1286	coro_destroy (aTHX_ coro);	1433	coro_destruct (aTHX_ coro);
1287		1434
1288	load_perl (aTHX_ &temp);	1435	load_perl (aTHX_ &temp);
1289		1436
1290	coro->slot = 0;	1437	coro->slot = 0;
1291	}	1438	}
…		…
1337	# define MGf_DUP 0	1484	# define MGf_DUP 0
1338	#endif	1485	#endif
1339	};	1486	};
1340		1487
1341	static void	1488	static void
1342	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1489	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1343	{	1490	{
1344	ta->prev = SvSTATE (prev_sv);	1491	ta->prev = SvSTATE (prev_sv);
1345	ta->next = SvSTATE (next_sv);	1492	ta->next = SvSTATE (next_sv);
1346	TRANSFER_CHECK (*ta);	1493	TRANSFER_CHECK (*ta);
1347	}	1494	}
1348		1495
1349	static void	1496	static void
1350	api_transfer (SV *prev_sv, SV *next_sv)	1497	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1351	{	1498	{
1352	dTHX;
1353	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1354		1500
1355	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1356	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1357	}	1503	}
1358		1504
…		…
1375		1521
1376	return 0;	1522	return 0;
1377	}	1523	}
1378		1524
1379	static int	1525	static int
1380	api_ready (SV *coro_sv)	1526	api_ready (pTHX_ SV *coro_sv)
1381	{	1527	{
1382	dTHX;
1383	struct coro *coro;	1528	struct coro *coro;
		1529	SV *sv_hook;
		1530	void (*xs_hook)(void);
1384		1531
1385	if (SvROK (coro_sv))	1532	if (SvROK (coro_sv))
1386	coro_sv = SvRV (coro_sv);	1533	coro_sv = SvRV (coro_sv);
1387		1534
1388	coro = SvSTATE (coro_sv);	1535	coro = SvSTATE (coro_sv);
…		…
1391	return 0;	1538	return 0;
1392		1539
1393	coro->flags |= CF_READY;	1540	coro->flags |= CF_READY;
1394		1541
1395	LOCK;	1542	LOCK;
		1543
		1544	sv_hook = coro_nready ? 0 : coro_readyhook;
		1545	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1546
1396	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));	1547	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1397	++coro_nready;	1548	++coro_nready;
		1549
1398	UNLOCK;	1550	UNLOCK;
		1551
		1552	if (sv_hook)
		1553	{
		1554	dSP;
		1555
		1556	ENTER;
		1557	SAVETMPS;
		1558
		1559	PUSHMARK (SP);
		1560	PUTBACK;
		1561	call_sv (sv_hook, G_DISCARD);
		1562	SPAGAIN;
		1563
		1564	FREETMPS;
		1565	LEAVE;
		1566	}
		1567
		1568	if (xs_hook)
		1569	xs_hook ();
1399		1570
1400	return 1;	1571	return 1;
1401	}	1572	}
1402		1573
1403	static int	1574	static int
1404	api_is_ready (SV *coro_sv)	1575	api_is_ready (pTHX_ SV *coro_sv)
1405	{	1576	{
1406	dTHX;
1407	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1408	}	1578	}
1409		1579
1410	static void	1580	INLINE void
1411	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1412	{	1582	{
1413	SV *prev_sv, *next_sv;	1583	SV *prev_sv, *next_sv;
1414		1584
1415	for (;;)	1585	for (;;)
1416	{	1586	{
…		…
1441	/* cannot transfer to destroyed coros, skip and look for next */	1611	/* cannot transfer to destroyed coros, skip and look for next */
1442	if (expect_false (ta->next->flags & CF_DESTROYED))	1612	if (expect_false (ta->next->flags & CF_DESTROYED))
1443	{	1613	{
1444	UNLOCK;	1614	UNLOCK;
1445	SvREFCNT_dec (next_sv);	1615	SvREFCNT_dec (next_sv);
1446	/* coro_nready is already taken care of by destroy */	1616	/* coro_nready has already been taken care of by destroy */
1447	continue;	1617	continue;
1448	}	1618	}
1449		1619
1450	--coro_nready;	1620	--coro_nready;
1451	UNLOCK;	1621	UNLOCK;
…		…
1454		1624
1455	/* free this only after the transfer */	1625	/* free this only after the transfer */
1456	prev_sv = SvRV (coro_current);	1626	prev_sv = SvRV (coro_current);
1457	ta->prev = SvSTATE (prev_sv);	1627	ta->prev = SvSTATE (prev_sv);
1458	TRANSFER_CHECK (*ta);	1628	TRANSFER_CHECK (*ta);
1459	assert (ta->next->flags & CF_READY);	1629	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1460	ta->next->flags &= ~CF_READY;	1630	ta->next->flags &= ~CF_READY;
1461	SvRV_set (coro_current, next_sv);	1631	SvRV_set (coro_current, next_sv);
1462		1632
1463	LOCK;	1633	LOCK;
1464	free_coro_mortal (aTHX);	1634	free_coro_mortal (aTHX);
1465	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1466	UNLOCK;	1636	UNLOCK;
1467	}	1637	}
1468		1638
1469	static void	1639	INLINE void
1470	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1471	{	1641	{
1472	api_ready (coro_current);	1642	api_ready (aTHX_ coro_current);
1473	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1474	}	1644	}
1475		1645
		1646	INLINE void
		1647	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1648	{
		1649	SV *prev = SvRV (coro_current);
		1650
		1651	if (coro_nready)
		1652	{
		1653	prepare_schedule (aTHX_ ta);
		1654	api_ready (aTHX_ prev);
		1655	}
		1656	else
		1657	prepare_nop (aTHX_ ta);
		1658	}
		1659
		1660	static void
		1661	api_schedule (pTHX)
		1662	{
		1663	struct coro_transfer_args ta;
		1664
		1665	prepare_schedule (aTHX_ &ta);
		1666	TRANSFER (ta, 1);
		1667	}
		1668
1476	static int	1669	static int
1477	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1670	api_cede (pTHX)
1478	{	1671	{
1479	if (coro_nready)	1672	struct coro_transfer_args ta;
1480	{	1673
1481	SV *prev = SvRV (coro_current);
1482	prepare_schedule (aTHX_ ta);	1674	prepare_cede (aTHX_ &ta);
1483	api_ready (prev);	1675
		1676	if (expect_true (ta.prev != ta.next))
		1677	{
		1678	TRANSFER (ta, 1);
1484	return 1;	1679	return 1;
1485	}	1680	}
1486	else	1681	else
1487	return 0;	1682	return 0;
1488	}	1683	}
1489		1684
1490	static void
1491	api_schedule (void)
1492	{
1493	dTHX;
1494	struct transfer_args ta;
1495
1496	prepare_schedule (aTHX_ &ta);
1497	TRANSFER (ta, 1);
1498	}
1499
1500	static int	1685	static int
1501	api_cede (void)	1686	api_cede_notself (pTHX)
1502	{	1687	{
1503	dTHX;	1688	if (coro_nready)
		1689	{
1504	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1505		1691
1506	prepare_cede (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1507
1508	if (expect_true (ta.prev != ta.next))
1509	{
1510	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1511	return 1;	1694	return 1;
1512	}	1695	}
1513	else	1696	else
1514	return 0;	1697	return 0;
1515	}	1698	}
1516		1699
1517	static int	1700	static void
1518	api_cede_notself (void)
1519	{
1520	dTHX;
1521	struct transfer_args ta;
1522
1523	if (prepare_cede_notself (aTHX_ &ta))
1524	{
1525	TRANSFER (ta, 1);
1526	return 1;
1527	}
1528	else
1529	return 0;
1530	}
1531
1532	static void
1533	api_trace (SV *coro_sv, int flags)	1701	api_trace (pTHX_ SV *coro_sv, int flags)
1534	{	1702	{
1535	dTHX;
1536	struct coro *coro = SvSTATE (coro_sv);	1703	struct coro *coro = SvSTATE (coro_sv);
1537		1704
1538	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1539	{	1706	{
1540	if (!coro->cctx)	1707	if (!coro->cctx)
1541	coro->cctx = cctx_new ();	1708	coro->cctx = cctx_new_run ();
1542	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1543	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1544		1711
1545	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1712	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1546	}	1713	}
1547	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1548	{	1715	{
…		…
1553	else	1720	else
1554	coro->slot->runops = RUNOPS_DEFAULT;	1721	coro->slot->runops = RUNOPS_DEFAULT;
1555	}	1722	}
1556	}	1723	}
1557		1724
		1725	#if 0
		1726	static int
		1727	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
		1728	{
		1729	AV *padlist;
		1730	AV *av = (AV *)mg->mg_obj;
		1731
		1732	abort ();
		1733
		1734	return 0;
		1735	}
		1736
		1737	static MGVTBL coro_gensub_vtbl = {
		1738	0, 0, 0, 0,
		1739	coro_gensub_free
		1740	};
		1741	#endif
		1742
		1743	/*****************************************************************************/
		1744	/* PerlIO::cede */
		1745
		1746	typedef struct
		1747	{
		1748	PerlIOBuf base;
		1749	NV next, every;
		1750	} PerlIOCede;
		1751
		1752	static IV
		1753	PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
		1754	{
		1755	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1756
		1757	self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
		1758	self->next = nvtime () + self->every;
		1759
		1760	return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
		1761	}
		1762
		1763	static SV *
		1764	PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
		1765	{
		1766	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1767
		1768	return newSVnv (self->every);
		1769	}
		1770
		1771	static IV
		1772	PerlIOCede_flush (pTHX_ PerlIO *f)
		1773	{
		1774	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1775	double now = nvtime ();
		1776
		1777	if (now >= self->next)
		1778	{
		1779	api_cede (aTHX);
		1780	self->next = now + self->every;
		1781	}
		1782
		1783	return PerlIOBuf_flush (aTHX_ f);
		1784	}
		1785
		1786	static PerlIO_funcs PerlIO_cede =
		1787	{
		1788	sizeof(PerlIO_funcs),
		1789	"cede",
		1790	sizeof(PerlIOCede),
		1791	PERLIO_K_DESTRUCT | PERLIO_K_RAW,
		1792	PerlIOCede_pushed,
		1793	PerlIOBuf_popped,
		1794	PerlIOBuf_open,
		1795	PerlIOBase_binmode,
		1796	PerlIOCede_getarg,
		1797	PerlIOBase_fileno,
		1798	PerlIOBuf_dup,
		1799	PerlIOBuf_read,
		1800	PerlIOBuf_unread,
		1801	PerlIOBuf_write,
		1802	PerlIOBuf_seek,
		1803	PerlIOBuf_tell,
		1804	PerlIOBuf_close,
		1805	PerlIOCede_flush,
		1806	PerlIOBuf_fill,
		1807	PerlIOBase_eof,
		1808	PerlIOBase_error,
		1809	PerlIOBase_clearerr,
		1810	PerlIOBase_setlinebuf,
		1811	PerlIOBuf_get_base,
		1812	PerlIOBuf_bufsiz,
		1813	PerlIOBuf_get_ptr,
		1814	PerlIOBuf_get_cnt,
		1815	PerlIOBuf_set_ptrcnt,
		1816	};
		1817
		1818	/*****************************************************************************/
		1819
		1820	static const CV *slf_cv; /* for quick consistency check */
		1821
		1822	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1823	static SV *slf_arg0;
		1824	static SV *slf_arg1;
		1825	static SV *slf_arg2;
		1826
		1827	/* this restores the stack in the case we patched the entersub, to */
		1828	/* recreate the stack frame as perl will on following calls */
		1829	/* since entersub cleared the stack */
		1830	static OP *
		1831	pp_restore (pTHX)
		1832	{
		1833	dSP;
		1834
		1835	PUSHMARK (SP);
		1836
		1837	EXTEND (SP, 3);
		1838	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1839	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1840	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1841	PUSHs ((SV *)CvGV (slf_cv));
		1842
		1843	RETURNOP (slf_restore.op_first);
		1844	}
		1845
		1846	static void
		1847	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1848	{
		1849	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1850	}
		1851
		1852	static void
		1853	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1854	{
		1855	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1856
		1857	frame->prepare = slf_prepare_set_stacklevel;
		1858	frame->check = slf_check_nop;
		1859	frame->data = (void *)SvIV (arg [0]);
		1860	}
		1861
		1862	static void
		1863	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1864	{
		1865	SV **arg = (SV **)slf_frame.data;
		1866
		1867	prepare_transfer (ta, arg [0], arg [1]);
		1868	}
		1869
		1870	static void
		1871	slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1872	{
		1873	if (items != 2)
		1874	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1875
		1876	frame->prepare = slf_prepare_transfer;
		1877	frame->check = slf_check_nop;
		1878	frame->data = (void *)arg; /* let's hope it will stay valid */
		1879	}
		1880
		1881	static void
		1882	slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1883	{
		1884	frame->prepare = prepare_schedule;
		1885	frame->check = slf_check_nop;
		1886	}
		1887
		1888	static void
		1889	slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1890	{
		1891	frame->prepare = prepare_cede;
		1892	frame->check = slf_check_nop;
		1893	}
		1894
		1895	static void
		1896	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
		1897	{
		1898	frame->prepare = prepare_cede_notself;
		1899	frame->check = slf_check_nop;
		1900	}
		1901
		1902	/* we hijack an hopefully unused CV flag for our purposes */
		1903	#define CVf_SLF 0x4000
		1904
		1905	/*
		1906	* these not obviously related functions are all rolled into one
		1907	* function to increase chances that they all will call transfer with the same
		1908	* stack offset
		1909	* SLF stands for "schedule-like-function".
		1910	*/
		1911	static OP *
		1912	pp_slf (pTHX)
		1913	{
		1914	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1915
		1916	/* set up the slf frame, unless it has already been set-up */
		1917	/* the latter happens when a new coro has been started */
		1918	/* or when a new cctx was attached to an existing coroutine */
		1919	if (expect_true (!slf_frame.prepare))
		1920	{
		1921	/* first iteration */
		1922	dSP;
		1923	SV **arg = PL_stack_base + TOPMARK + 1;
		1924	int items = SP - arg; /* args without function object */
		1925	SV *gv = *sp;
		1926
		1927	/* do a quick consistency check on the "function" object, and if it isn't */
		1928	/* for us, divert to the real entersub */
		1929	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1930	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1931
		1932	/* pop args */
		1933	SP = PL_stack_base + POPMARK;
		1934
		1935	if (!(PL_op->op_flags & OPf_STACKED))
		1936	{
		1937	/* ampersand-form of call, use @_ instead of stack */
		1938	AV *av = GvAV (PL_defgv);
		1939	arg = AvARRAY (av);
		1940	items = AvFILLp (av) + 1;
		1941	}
		1942
		1943	PUTBACK;
		1944
		1945	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
		1946	}
		1947
		1948	/* now interpret the slf_frame */
		1949	/* we use a callback system not to make the code needlessly */
		1950	/* complicated, but so we can run multiple perl coros from one cctx */
		1951
		1952	do
		1953	{
		1954	struct coro_transfer_args ta;
		1955
		1956	slf_frame.prepare (aTHX_ &ta);
		1957	TRANSFER (ta, 0);
		1958
		1959	checkmark = PL_stack_sp - PL_stack_base;
		1960	}
		1961	while (slf_frame.check (aTHX_ &slf_frame));
		1962
		1963	{
		1964	dSP;
		1965	SV **bot = PL_stack_base + checkmark;
		1966	int gimme = GIMME_V;
		1967
		1968	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
		1969
		1970	/* make sure we put something on the stack in scalar context */
		1971	if (gimme == G_SCALAR)
		1972	{
		1973	if (sp == bot)
		1974	XPUSHs (&PL_sv_undef);
		1975
		1976	SP = bot + 1;
		1977	}
		1978
		1979	PUTBACK;
		1980	}
		1981
		1982	return NORMAL;
		1983	}
		1984
		1985	static void
		1986	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
		1987	{
		1988	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1989
		1990	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1991	&& PL_op->op_ppaddr != pp_slf)
		1992	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1993
		1994	if (items > 3)
		1995	croak ("Coro only supports up to three arguments to SLF functions currently, caught");
		1996
		1997	CvFLAGS (cv) |= CVf_SLF;
		1998	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1999	slf_cv = cv;
		2000
		2001	/* we patch the op, and then re-run the whole call */
		2002	/* we have to put the same argument on the stack for this to work */
		2003	/* and this will be done by pp_restore */
		2004	slf_restore.op_next = (OP *)&slf_restore;
		2005	slf_restore.op_type = OP_NULL;
		2006	slf_restore.op_ppaddr = pp_restore;
		2007	slf_restore.op_first = PL_op;
		2008
		2009	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		2010	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		2011	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
		2012
		2013	PL_op->op_ppaddr = pp_slf;
		2014
		2015	PL_op = (OP *)&slf_restore;
		2016	}
		2017
1558	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2018	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1559		2019
1560	PROTOTYPES: DISABLE	2020	PROTOTYPES: DISABLE
1561		2021
1562	BOOT:	2022	BOOT:
1563	{	2023	{
1564	#ifdef USE_ITHREADS	2024	#ifdef USE_ITHREADS
1565	MUTEX_INIT (&coro_mutex);	2025	MUTEX_INIT (&coro_lock);
		2026	# if CORO_PTHREAD
		2027	coro_thx = PERL_GET_CONTEXT;
		2028	# endif
1566	#endif	2029	#endif
1567	BOOT_PAGESIZE;	2030	BOOT_PAGESIZE;
1568		2031
1569	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	2032	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1570	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	2033	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1571		2034
1572	orig_sigelem_get = PL_vtbl_sigelem.svt_get;	2035	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1573	PL_vtbl_sigelem.svt_get = coro_sigelem_get;	2036	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1574	orig_sigelem_set = PL_vtbl_sigelem.svt_set;	2037	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1575	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1576		2038
1577	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);	2039	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1578	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));	2040	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1579	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));	2041	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1580		2042
…		…
1589	main_top_env = PL_top_env;	2051	main_top_env = PL_top_env;
1590		2052
1591	while (main_top_env->je_prev)	2053	while (main_top_env->je_prev)
1592	main_top_env = main_top_env->je_prev;	2054	main_top_env = main_top_env->je_prev;
1593		2055
1594	coroapi.ver = CORO_API_VERSION;	2056	coroapi.ver = CORO_API_VERSION;
1595	coroapi.rev = CORO_API_REVISION;	2057	coroapi.rev = CORO_API_REVISION;
		2058
1596	coroapi.transfer = api_transfer;	2059	coroapi.transfer = api_transfer;
		2060
		2061	coroapi.sv_state = SvSTATE_;
		2062	coroapi.execute_slf = api_execute_slf;
		2063	coroapi.prepare_nop = prepare_nop;
		2064	coroapi.prepare_schedule = prepare_schedule;
		2065	coroapi.prepare_cede = prepare_cede;
		2066	coroapi.prepare_cede_notself = prepare_cede_notself;
		2067
		2068	{
		2069	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
		2070
		2071	if (!svp) croak ("Time::HiRes is required");
		2072	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
		2073
		2074	nvtime = INT2PTR (double (*)(), SvIV (*svp));
		2075	}
1597		2076
1598	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	2077	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1599	}	2078	}
1600		2079
1601	SV *	2080	SV *
…		…
1625	av_push (coro->args, newSVsv (ST (i)));	2104	av_push (coro->args, newSVsv (ST (i)));
1626	}	2105	}
1627	OUTPUT:	2106	OUTPUT:
1628	RETVAL	2107	RETVAL
1629		2108
1630	# these not obviously related functions are all rolled into the same xs
1631	# function to increase chances that they all will call transfer with the same
1632	# stack offset
1633	void	2109	void
1634	_set_stacklevel (...)	2110	_set_stacklevel (...)
1635	ALIAS:	2111	CODE:
1636	Coro::State::transfer = 1	2112	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1637	Coro::schedule = 2
1638	Coro::cede = 3
1639	Coro::cede_notself = 4
1640	CODE:
1641	{
1642	struct transfer_args ta;
1643		2113
1644	PUTBACK;	2114	void
1645	switch (ix)	2115	transfer (...)
1646	{	2116	CODE:
1647	case 0:	2117	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1648	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1649	ta.next = 0;
1650	break;
1651
1652	case 1:
1653	if (items != 2)
1654	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1655
1656	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1657	break;
1658
1659	case 2:
1660	prepare_schedule (aTHX_ &ta);
1661	break;
1662
1663	case 3:
1664	prepare_cede (aTHX_ &ta);
1665	break;
1666
1667	case 4:
1668	if (!prepare_cede_notself (aTHX_ &ta))
1669	XSRETURN_EMPTY;
1670
1671	break;
1672	}
1673	SPAGAIN;
1674
1675	BARRIER;
1676	PUTBACK;
1677	TRANSFER (ta, 0);
1678	SPAGAIN; /* might be the sp of a different coroutine now */
1679	/* be extra careful not to ever do anything after TRANSFER */
1680	}
1681		2118
1682	bool	2119	bool
1683	_destroy (SV *coro_sv)	2120	_destroy (SV *coro_sv)
1684	CODE:	2121	CODE:
1685	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2122	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1686	OUTPUT:	2123	OUTPUT:
1687	RETVAL	2124	RETVAL
1688		2125
1689	void	2126	void
1690	_exit (code)	2127	_exit (int code)
1691	int code
1692	PROTOTYPE: $	2128	PROTOTYPE: $
1693	CODE:	2129	CODE:
1694	_exit (code);	2130	_exit (code);
1695		2131
1696	int	2132	int
1697	cctx_stacksize (int new_stacksize = 0)	2133	cctx_stacksize (int new_stacksize = 0)
1698	CODE:	2134	CODE:
1699	RETVAL = coro_stacksize;	2135	RETVAL = cctx_stacksize;
1700	if (new_stacksize)	2136	if (new_stacksize)
		2137	{
1701	coro_stacksize = new_stacksize;	2138	cctx_stacksize = new_stacksize;
		2139	++cctx_gen;
		2140	}
		2141	OUTPUT:
		2142	RETVAL
		2143
		2144	int
		2145	cctx_max_idle (int max_idle = 0)
		2146	CODE:
		2147	RETVAL = cctx_max_idle;
		2148	if (max_idle > 1)
		2149	cctx_max_idle = max_idle;
1702	OUTPUT:	2150	OUTPUT:
1703	RETVAL	2151	RETVAL
1704		2152
1705	int	2153	int
1706	cctx_count ()	2154	cctx_count ()
…		…
1730	call (Coro::State coro, SV *coderef)	2178	call (Coro::State coro, SV *coderef)
1731	ALIAS:	2179	ALIAS:
1732	eval = 1	2180	eval = 1
1733	CODE:	2181	CODE:
1734	{	2182	{
1735	if (coro->mainstack)	2183	if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1736	{	2184	{
1737	struct coro temp;	2185	struct coro temp;
1738		2186
1739	if (!(coro->flags & CF_RUNNING))	2187	if (!(coro->flags & CF_RUNNING))
1740	{	2188	{
…		…
1784	RETVAL = boolSV (coro->flags & ix);	2232	RETVAL = boolSV (coro->flags & ix);
1785	OUTPUT:	2233	OUTPUT:
1786	RETVAL	2234	RETVAL
1787		2235
1788	void	2236	void
		2237	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2238	PROTOTYPE: $;$
		2239	CODE:
		2240	SvREFCNT_dec (self->throw);
		2241	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2242
		2243	void
1789	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2244	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2245	C_ARGS: aTHX_ coro, flags
1790		2246
1791	SV *	2247	SV *
1792	has_stack (Coro::State coro)	2248	has_cctx (Coro::State coro)
1793	PROTOTYPE: $	2249	PROTOTYPE: $
1794	CODE:	2250	CODE:
1795	RETVAL = boolSV (!!coro->cctx);	2251	RETVAL = boolSV (!!coro->cctx);
1796	OUTPUT:	2252	OUTPUT:
1797	RETVAL	2253	RETVAL
…		…
1802	CODE:	2258	CODE:
1803	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2259	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1804	OUTPUT:	2260	OUTPUT:
1805	RETVAL	2261	RETVAL
1806		2262
1807	IV	2263	UV
1808	rss (Coro::State coro)	2264	rss (Coro::State coro)
1809	PROTOTYPE: $	2265	PROTOTYPE: $
1810	ALIAS:	2266	ALIAS:
1811	usecount = 1	2267	usecount = 1
1812	CODE:	2268	CODE:
…		…
1822	force_cctx ()	2278	force_cctx ()
1823	CODE:	2279	CODE:
1824	struct coro *coro = SvSTATE (coro_current);	2280	struct coro *coro = SvSTATE (coro_current);
1825	coro->cctx->idle_sp = 0;	2281	coro->cctx->idle_sp = 0;
1826		2282
		2283	void
		2284	swap_defsv (Coro::State self)
		2285	PROTOTYPE: $
		2286	ALIAS:
		2287	swap_defav = 1
		2288	CODE:
		2289	if (!self->slot)
		2290	croak ("cannot swap state with coroutine that has no saved state,");
		2291	else
		2292	{
		2293	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		2294	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		2295
		2296	SV *tmp = *src; *src = *dst; *dst = tmp;
		2297	}
		2298
1827	MODULE = Coro::State PACKAGE = Coro	2299	MODULE = Coro::State PACKAGE = Coro
1828		2300
1829	BOOT:	2301	BOOT:
1830	{	2302	{
1831	int i;	2303	int i;
1832		2304
		2305	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1833	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);	2306	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1834	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);	2307	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1835	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1836		2308
1837	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);	2309	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1838	SvREADONLY_on (coro_current);	2310	SvREADONLY_on (coro_current);
1839		2311
1840	coro_stash = gv_stashpv ("Coro", TRUE);	2312	coro_stash = gv_stashpv ("Coro", TRUE);
…		…
1848		2320
1849	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2321	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1850	coro_ready[i] = newAV ();	2322	coro_ready[i] = newAV ();
1851		2323
1852	{	2324	{
1853	SV *sv = perl_get_sv ("Coro::API", TRUE);	2325	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1854	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1855		2326
1856	coroapi.schedule = api_schedule;	2327	coroapi.schedule = api_schedule;
1857	coroapi.cede = api_cede;	2328	coroapi.cede = api_cede;
1858	coroapi.cede_notself = api_cede_notself;	2329	coroapi.cede_notself = api_cede_notself;
1859	coroapi.ready = api_ready;	2330	coroapi.ready = api_ready;
1860	coroapi.is_ready = api_is_ready;	2331	coroapi.is_ready = api_is_ready;
1861	coroapi.nready = &coro_nready;	2332	coroapi.nready = coro_nready;
1862	coroapi.current = coro_current;	2333	coroapi.current = coro_current;
1863		2334
1864	GCoroAPI = &coroapi;	2335	GCoroAPI = &coroapi;
1865	sv_setiv (sv, (IV)&coroapi);	2336	sv_setiv (sv, (IV)&coroapi);
1866	SvREADONLY_on (sv);	2337	SvREADONLY_on (sv);
1867	}	2338	}
1868	}	2339	}
		2340
		2341	void
		2342	schedule (...)
		2343	CODE:
		2344	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), items);
		2345
		2346	void
		2347	cede (...)
		2348	CODE:
		2349	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), items);
		2350
		2351	void
		2352	cede_notself (...)
		2353	CODE:
		2354	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), items);
1869		2355
1870	void	2356	void
1871	_set_current (SV *current)	2357	_set_current (SV *current)
1872	PROTOTYPE: $	2358	PROTOTYPE: $
1873	CODE:	2359	CODE:
1874	SvREFCNT_dec (SvRV (coro_current));	2360	SvREFCNT_dec (SvRV (coro_current));
1875	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	2361	SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
		2362
		2363	void
		2364	_set_readyhook (SV *hook)
		2365	PROTOTYPE: $
		2366	CODE:
		2367	LOCK;
		2368	SvREFCNT_dec (coro_readyhook);
		2369	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		2370	UNLOCK;
1876		2371
1877	int	2372	int
1878	prio (Coro::State coro, int newprio = 0)	2373	prio (Coro::State coro, int newprio = 0)
1879	ALIAS:	2374	ALIAS:
1880	nice = 1	2375	nice = 1
…		…
1898		2393
1899	SV *	2394	SV *
1900	ready (SV *self)	2395	ready (SV *self)
1901	PROTOTYPE: $	2396	PROTOTYPE: $
1902	CODE:	2397	CODE:
1903	RETVAL = boolSV (api_ready (self));	2398	RETVAL = boolSV (api_ready (aTHX_ self));
1904	OUTPUT:	2399	OUTPUT:
1905	RETVAL	2400	RETVAL
1906		2401
1907	int	2402	int
1908	nready (...)	2403	nready (...)
…		…
1910	CODE:	2405	CODE:
1911	RETVAL = coro_nready;	2406	RETVAL = coro_nready;
1912	OUTPUT:	2407	OUTPUT:
1913	RETVAL	2408	RETVAL
1914		2409
1915	void
1916	throw (Coro::State self, SV *throw = &PL_sv_undef)
1917	PROTOTYPE: $;$
1918	CODE:
1919	SvREFCNT_dec (self->throw);
1920	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1921
1922	void
1923	swap_defsv (Coro::State self)
1924	PROTOTYPE: $
1925	ALIAS:
1926	swap_defav = 1
1927	CODE:
1928	if (!self->slot)
1929	croak ("cannot swap state with coroutine that has no saved state");
1930	else
1931	{
1932	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1933	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1934
1935	SV *tmp = *src; *src = *dst; *dst = tmp;
1936	}
1937
1938	# for async_pool speedup	2410	# for async_pool speedup
1939	void	2411	void
1940	_pool_1 (SV *cb)	2412	_pool_1 (SV *cb)
1941	CODE:	2413	CODE:
1942	{	2414	{
…		…
1947	AV *invoke_av;	2419	AV *invoke_av;
1948	int i, len;	2420	int i, len;
1949		2421
1950	if (!invoke)	2422	if (!invoke)
1951	{	2423	{
1952	SvREFCNT_dec (PL_diehook); PL_diehook = 0;	2424	SV *old = PL_diehook;
		2425	PL_diehook = 0;
		2426	SvREFCNT_dec (old);
1953	croak ("\3async_pool terminate\2\n");	2427	croak ("\3async_pool terminate\2\n");
1954	}	2428	}
1955		2429
1956	SvREFCNT_dec (coro->saved_deffh);	2430	SvREFCNT_dec (coro->saved_deffh);
1957	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);	2431	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1958		2432
1959	hv_store (hv, "desc", sizeof ("desc") - 1,	2433	hv_store (hv, "desc", sizeof ("desc") - 1,
1960	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);	2434	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1961		2435
1962	invoke_av = (AV *)SvRV (invoke);	2436	invoke_av = (AV *)SvRV (invoke);
…		…
1966		2440
1967	if (len > 0)	2441	if (len > 0)
1968	{	2442	{
1969	av_fill (defav, len - 1);	2443	av_fill (defav, len - 1);
1970	for (i = 0; i < len; ++i)	2444	for (i = 0; i < len; ++i)
1971	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));	2445	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1972	}	2446	}
1973		2447
1974	SvREFCNT_dec (invoke);	2448	SvREFCNT_dec (invoke);
1975	}	2449	}
1976		2450
…		…
1983	sv_setsv (cb, &PL_sv_undef);	2457	sv_setsv (cb, &PL_sv_undef);
1984		2458
1985	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2459	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1986	coro->saved_deffh = 0;	2460	coro->saved_deffh = 0;
1987		2461
1988	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2462	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1989	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2463	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1990	{	2464	{
1991	SvREFCNT_dec (PL_diehook); PL_diehook = 0;	2465	SV *old = PL_diehook;
		2466	PL_diehook = 0;
		2467	SvREFCNT_dec (old);
1992	croak ("\3async_pool terminate\2\n");	2468	croak ("\3async_pool terminate\2\n");
1993	}	2469	}
1994		2470
1995	av_clear (GvAV (PL_defgv));	2471	av_clear (GvAV (PL_defgv));
1996	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	2472	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1997	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2473	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1998		2474
1999	coro->prio = 0;	2475	coro->prio = 0;
2000		2476
2001	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2477	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002	api_trace (coro_current, 0);	2478	api_trace (aTHX_ coro_current, 0);
2003		2479
2004	av_push (av_async_pool, newSVsv (coro_current));	2480	av_push (av_async_pool, newSVsv (coro_current));
2005	}	2481	}
2006		2482
		2483	#if 0
		2484
		2485	void
		2486	_generator_call (...)
		2487	PROTOTYPE: @
		2488	PPCODE:
		2489	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
		2490	xxxx
		2491	abort ();
		2492
		2493	SV *
		2494	gensub (SV *sub, ...)
		2495	PROTOTYPE: &;@
		2496	CODE:
		2497	{
		2498	struct coro *coro;
		2499	MAGIC *mg;
		2500	CV *xcv;
		2501	CV *ncv = (CV *)newSV_type (SVt_PVCV);
		2502	int i;
		2503
		2504	CvGV (ncv) = CvGV (cv);
		2505	CvFILE (ncv) = CvFILE (cv);
		2506
		2507	Newz (0, coro, 1, struct coro);
		2508	coro->args = newAV ();
		2509	coro->flags = CF_NEW;
		2510
		2511	av_extend (coro->args, items - 1);
		2512	for (i = 1; i < items; i++)
		2513	av_push (coro->args, newSVsv (ST (i)));
		2514
		2515	CvISXSUB_on (ncv);
		2516	CvXSUBANY (ncv).any_ptr = (void *)coro;
		2517
		2518	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
		2519
		2520	CvXSUB (ncv) = CvXSUB (xcv);
		2521	CvANON_on (ncv);
		2522
		2523	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
		2524	RETVAL = newRV_noinc ((SV *)ncv);
		2525	}
		2526	OUTPUT:
		2527	RETVAL
		2528
		2529	#endif
		2530
2007		2531
2008	MODULE = Coro::State PACKAGE = Coro::AIO	2532	MODULE = Coro::State PACKAGE = Coro::AIO
2009		2533
2010	SV *	2534	void
2011	_get_state ()	2535	_get_state (SV *self)
2012	CODE:	2536	PPCODE:
2013	{	2537	{
2014	struct io_state *data;	2538	AV *defav = GvAV (PL_defgv);
2015		2539	AV *av = newAV ();
		2540	int i;
2016	RETVAL = newSV (sizeof (struct io_state));	2541	SV *data_sv = newSV (sizeof (struct io_state));
2017	data = (struct io_state *)SvPVX (RETVAL);	2542	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2018	SvCUR_set (RETVAL, sizeof (struct io_state));	2543	SvCUR_set (data_sv, sizeof (struct io_state));
2019	SvPOK_only (RETVAL);	2544	SvPOK_only (data_sv);
2020		2545
2021	data->errorno = errno;	2546	data->errorno = errno;
2022	data->laststype = PL_laststype;	2547	data->laststype = PL_laststype;
2023	data->laststatval = PL_laststatval;	2548	data->laststatval = PL_laststatval;
2024	data->statcache = PL_statcache;	2549	data->statcache = PL_statcache;
		2550
		2551	av_extend (av, AvFILLp (defav) + 1 + 1);
		2552
		2553	for (i = 0; i <= AvFILLp (defav); ++i)
		2554	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
		2555
		2556	av_push (av, data_sv);
		2557
		2558	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		2559
		2560	api_ready (aTHX_ self);
2025	}	2561	}
2026	OUTPUT:
2027	RETVAL
2028		2562
2029	void	2563	void
2030	_set_state (char *data_)	2564	_set_state (SV *state)
2031	PROTOTYPE: $	2565	PROTOTYPE: $
2032	CODE:	2566	PPCODE:
2033	{	2567	{
2034	struct io_state *data = (void *)data_;	2568	AV *av = (AV *)SvRV (state);
		2569	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
		2570	int i;
2035		2571
2036	errno = data->errorno;	2572	errno = data->errorno;
2037	PL_laststype = data->laststype;	2573	PL_laststype = data->laststype;
2038	PL_laststatval = data->laststatval;	2574	PL_laststatval = data->laststatval;
2039	PL_statcache = data->statcache;	2575	PL_statcache = data->statcache;
2040	}
2041		2576
		2577	EXTEND (SP, AvFILLp (av));
		2578	for (i = 0; i < AvFILLp (av); ++i)
		2579	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
		2580	}
		2581
		2582
		2583	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2584
		2585	BOOT:
		2586	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2587
		2588	SV *
		2589	_schedule (...)
		2590	PROTOTYPE: @
		2591	CODE:
		2592	{
		2593	static int incede;
		2594
		2595	api_cede_notself (aTHX);
		2596
		2597	++incede;
		2598	while (coro_nready >= incede && api_cede (aTHX))
		2599	;
		2600
		2601	sv_setsv (sv_activity, &PL_sv_undef);
		2602	if (coro_nready >= incede)
		2603	{
		2604	PUSHMARK (SP);
		2605	PUTBACK;
		2606	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
		2607	SPAGAIN;
		2608	}
		2609
		2610	--incede;
		2611	}
		2612
		2613
		2614	MODULE = Coro::State PACKAGE = PerlIO::cede
		2615
		2616	BOOT:
		2617	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2618

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