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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.362 by root, Wed Jul 1 07:58:45 2009 UTC vs.
Revision 1.401 by root, Mon May 16 22:08:24 2011 UTC

		1	/* this works around a bug in mingw32 providing a non-working setjmp */
		2	#define USE_NO_MINGW_SETJMP_TWO_ARGS
		3
		4	#define NDEBUG 1
		5
1	#include "libcoro/coro.c"	6	#include "libcoro/coro.c"
2		7
3	#define PERL_NO_GET_CONTEXT	8	#define PERL_NO_GET_CONTEXT
4	#define PERL_EXT	9	#define PERL_EXT
5		10
6	#include "EXTERN.h"	11	#include "EXTERN.h"
7	#include "perl.h"	12	#include "perl.h"
8	#include "XSUB.h"	13	#include "XSUB.h"
9	#include "perliol.h"	14	#include "perliol.h"
10		15
11	#include "patchlevel.h"	16	#include "schmorp.h"
12		17
13	#include <stdio.h>	18	#include <stdio.h>
14	#include <errno.h>	19	#include <errno.h>
15	#include <assert.h>	20	#include <assert.h>
16		21
17	#ifdef WIN32	22	#ifndef SVs_PADSTALE
		23	# define SVs_PADSTALE 0
		24	#endif
		25
		26	#if defined(_WIN32)
		27	# undef HAS_GETTIMEOFDAY
18	# undef setjmp	28	# undef setjmp
19	# undef longjmp	29	# undef longjmp
20	# undef _exit	30	# undef _exit
21	# define setjmp _setjmp /* deep magic */	31	# define setjmp _setjmp /* deep magic */
22	#else	32	#else
…		…
51	#endif	61	#endif
52		62
53	/* the maximum number of idle cctx that will be pooled */	63	/* the maximum number of idle cctx that will be pooled */
54	static int cctx_max_idle = 4;	64	static int cctx_max_idle = 4;
55		65
56	#define PERL_VERSION_ATLEAST(a,b,c) \
57	(PERL_REVISION > (a) \
58	|| (PERL_REVISION == (a) \
59	&& (PERL_VERSION > (b) \
60	|| (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62	#if !PERL_VERSION_ATLEAST (5,6,0)
63	# ifndef PL_ppaddr
64	# define PL_ppaddr ppaddr
65	# endif
66	# ifndef call_sv
67	# define call_sv perl_call_sv
68	# endif
69	# ifndef get_sv
70	# define get_sv perl_get_sv
71	# endif
72	# ifndef get_cv
73	# define get_cv perl_get_cv
74	# endif
75	# ifndef IS_PADGV
76	# define IS_PADGV(v) 0
77	# endif
78	# ifndef IS_PADCONST
79	# define IS_PADCONST(v) 0
80	# endif
81	#endif
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
93	/* 5.8.8 */
94	#ifndef GV_NOTQUAL
95	# define GV_NOTQUAL 0
96	#endif
97	#ifndef newSV
98	# define newSV(l) NEWSV(0,l)
99	#endif
100	#ifndef CvISXSUB_on
101	# define CvISXSUB_on(cv) (void)cv
102	#endif
103	#ifndef CvISXSUB
104	# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105	#endif
106	#ifndef Newx
107	# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108	#endif
109
110	/* 5.8.7 */
111	#ifndef SvRV_set
112	# define SvRV_set(s,v) SvRV(s) = (v)
113	#endif
114
115	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	66	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116	# undef CORO_STACKGUARD	67	# undef CORO_STACKGUARD
117	#endif	68	#endif
118		69
119	#ifndef CORO_STACKGUARD	70	#ifndef CORO_STACKGUARD
…		…
175	static void (*u2time)(pTHX_ UV ret[2]);	126	static void (*u2time)(pTHX_ UV ret[2]);
176		127
177	/* we hijack an hopefully unused CV flag for our purposes */	128	/* we hijack an hopefully unused CV flag for our purposes */
178	#define CVf_SLF 0x4000	129	#define CVf_SLF 0x4000
179	static OP *pp_slf (pTHX);	130	static OP *pp_slf (pTHX);
		131	static void slf_destroy (pTHX_ struct coro *coro);
180		132
181	static U32 cctx_gen;	133	static U32 cctx_gen;
182	static size_t cctx_stacksize = CORO_STACKSIZE;	134	static size_t cctx_stacksize = CORO_STACKSIZE;
183	static struct CoroAPI coroapi;	135	static struct CoroAPI coroapi;
184	static AV *main_mainstack; /* used to differentiate between $main and others */	136	static AV *main_mainstack; /* used to differentiate between $main and others */
…		…
201	static SV *sv_pool_size;	153	static SV *sv_pool_size;
202	static SV *sv_async_pool_idle; /* description string */	154	static SV *sv_async_pool_idle; /* description string */
203	static AV *av_async_pool; /* idle pool */	155	static AV *av_async_pool; /* idle pool */
204	static SV *sv_Coro; /* class string */	156	static SV *sv_Coro; /* class string */
205	static CV *cv_pool_handler;	157	static CV *cv_pool_handler;
206	static CV *cv_coro_state_new;
207		158
208	/* Coro::AnyEvent */	159	/* Coro::AnyEvent */
209	static SV *sv_activity;	160	static SV *sv_activity;
210		161
211	/* enable processtime/realtime profiling */	162	/* enable processtime/realtime profiling */
…		…
215	static char times_valid;	166	static char times_valid;
216		167
217	static struct coro_cctx *cctx_first;	168	static struct coro_cctx *cctx_first;
218	static int cctx_count, cctx_idle;	169	static int cctx_count, cctx_idle;
219		170
220	enum {	171	enum
		172	{
221	CC_MAPPED = 0x01,	173	CC_MAPPED = 0x01,
222	CC_NOREUSE = 0x02, /* throw this away after tracing */	174	CC_NOREUSE = 0x02, /* throw this away after tracing */
223	CC_TRACE = 0x04,	175	CC_TRACE = 0x04,
224	CC_TRACE_SUB = 0x08, /* trace sub calls */	176	CC_TRACE_SUB = 0x08, /* trace sub calls */
225	CC_TRACE_LINE = 0x10, /* trace each statement */	177	CC_TRACE_LINE = 0x10, /* trace each statement */
…		…
246	int valgrind_id;	198	int valgrind_id;
247	#endif	199	#endif
248	unsigned char flags;	200	unsigned char flags;
249	} coro_cctx;	201	} coro_cctx;
250		202
251	coro_cctx *cctx_current; /* the currently running cctx */	203	static coro_cctx *cctx_current; /* the currently running cctx */
252		204
253	/*****************************************************************************/	205	/*****************************************************************************/
254		206
		207	static MGVTBL coro_state_vtbl;
		208
255	enum {	209	enum
		210	{
256	CF_RUNNING = 0x0001, /* coroutine is running */	211	CF_RUNNING = 0x0001, /* coroutine is running */
257	CF_READY = 0x0002, /* coroutine is ready */	212	CF_READY = 0x0002, /* coroutine is ready */
258	CF_NEW = 0x0004, /* has never been switched to */	213	CF_NEW = 0x0004, /* has never been switched to */
259	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	214	CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
260	CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */	215	CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
		216	CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
261	};	217	};
262		218
263	/* the structure where most of the perl state is stored, overlaid on the cxstack */	219	/* the structure where most of the perl state is stored, overlaid on the cxstack */
264	typedef struct	220	typedef struct
265	{	221	{
…		…
271	#define VAR(name,type) type name;	227	#define VAR(name,type) type name;
272	# include "state.h"	228	# include "state.h"
273	#undef VAR	229	#undef VAR
274	} perl_slots;	230	} perl_slots;
275		231
		232	// how many context stack entries do we need for perl_slots
276	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	233	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
277		234
278	/* this is a structure representing a perl-level coroutine */	235	/* this is a structure representing a perl-level coroutine */
279	struct coro {	236	struct coro
		237	{
280	/* the C coroutine allocated to this perl coroutine, if any */	238	/* the C coroutine allocated to this perl coroutine, if any */
281	coro_cctx *cctx;	239	coro_cctx *cctx;
282		240
283	/* ready queue */	241	/* ready queue */
284	struct coro *next_ready;	242	struct coro *next_ready;
…		…
286	/* state data */	244	/* state data */
287	struct CoroSLF slf_frame; /* saved slf frame */	245	struct CoroSLF slf_frame; /* saved slf frame */
288	AV *mainstack;	246	AV *mainstack;
289	perl_slots *slot; /* basically the saved sp */	247	perl_slots *slot; /* basically the saved sp */
290		248
291	CV *startcv; /* the CV to execute */	249	CV *startcv; /* the CV to execute */
292	AV *args; /* data associated with this coroutine (initial args) */	250	AV *args; /* data associated with this coroutine (initial args) */
293	int refcnt; /* coroutines are refcounted, yes */
294	int flags; /* CF_ flags */	251	int flags; /* CF_ flags */
295	HV *hv; /* the perl hash associated with this coro, if any */	252	HV *hv; /* the perl hash associated with this coro, if any */
296	void (*on_destroy)(pTHX_ struct coro *coro);
297		253
298	/* statistics */	254	/* statistics */
299	int usecount; /* number of transfers to this coro */	255	int usecount; /* number of transfers to this coro */
300		256
301	/* coro process data */	257	/* coro process data */
302	int prio;	258	int prio;
303	SV *except; /* exception to be thrown */	259	SV *except; /* exception to be thrown */
304	SV *rouse_cb;	260	SV *rouse_cb; /* last rouse callback */
		261	AV *on_destroy; /* callbacks or coros to notify on destroy */
		262	AV *status; /* the exit status list */
305		263
306	/* async_pool */	264	/* async_pool */
307	SV *saved_deffh;	265	SV *saved_deffh;
308	SV *invoke_cb;	266	SV *invoke_cb;
309	AV *invoke_av;	267	AV *invoke_av;
310		268
311	/* on_enter/on_leave */	269	/* on_enter/on_leave */
312	AV *on_enter;	270	AV *on_enter;
313	AV *on_leave;	271	AV *on_leave;
314		272
		273	/* swap_sv */
		274	AV *swap_sv;
		275
315	/* times */	276	/* times */
316	coro_ts t_cpu, t_real;	277	coro_ts t_cpu, t_real;
317		278
318	/* linked list */	279	/* linked list */
319	struct coro *next, *prev;	280	struct coro *next, *prev;
…		…
322	typedef struct coro *Coro__State;	283	typedef struct coro *Coro__State;
323	typedef struct coro *Coro__State_or_hashref;	284	typedef struct coro *Coro__State_or_hashref;
324		285
325	/* the following variables are effectively part of the perl context */	286	/* the following variables are effectively part of the perl context */
326	/* and get copied between struct coro and these variables */	287	/* and get copied between struct coro and these variables */
327	/* the mainr easonw e don't support windows process emulation */	288	/* the main reason we don't support windows process emulation */
328	static struct CoroSLF slf_frame; /* the current slf frame */	289	static struct CoroSLF slf_frame; /* the current slf frame */
329		290
330	/** Coro ********************************************************************/	291	/** Coro ********************************************************************/
331		292
332	#define CORO_PRIO_MAX 3	293	#define CORO_PRIO_MAX 3
…		…
338		299
339	/* for Coro.pm */	300	/* for Coro.pm */
340	static SV *coro_current;	301	static SV *coro_current;
341	static SV *coro_readyhook;	302	static SV *coro_readyhook;
342	static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */	303	static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
343	static CV *cv_coro_run, *cv_coro_terminate;	304	static CV *cv_coro_run;
344	static struct coro *coro_first;	305	static struct coro *coro_first;
345	#define coro_nready coroapi.nready	306	#define coro_nready coroapi.nready
		307
		308	/** Coro::Select ************************************************************/
		309
		310	static OP *(*coro_old_pp_sselect) (pTHX);
		311	static SV *coro_select_select;
		312
		313	/* horrible hack, but if it works... */
		314	static OP *
		315	coro_pp_sselect (pTHX)
		316	{
		317	dSP;
		318	PUSHMARK (SP - 4); /* fake argument list */
		319	XPUSHs (coro_select_select);
		320	PUTBACK;
		321
		322	/* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
		323	PL_op->op_flags |= OPf_STACKED;
		324	PL_op->op_private = 0;
		325	return PL_ppaddr [OP_ENTERSUB](aTHX);
		326	}
		327
		328	/** time stuff **************************************************************/
		329
		330	#ifdef HAS_GETTIMEOFDAY
		331
		332	static void
		333	coro_u2time (pTHX_ UV ret[2])
		334	{
		335	struct timeval tv;
		336	gettimeofday (&tv, 0);
		337
		338	ret [0] = tv.tv_sec;
		339	ret [1] = tv.tv_usec;
		340	}
		341
		342	static double
		343	coro_nvtime ()
		344	{
		345	struct timeval tv;
		346	gettimeofday (&tv, 0);
		347
		348	return tv.tv_sec + tv.tv_usec * 1e-6;
		349	}
		350
		351	static void
		352	time_init (pTHX)
		353	{
		354	nvtime = coro_nvtime;
		355	u2time = coro_u2time;
		356	}
		357
		358	#else
		359
		360	static void
		361	time_init (pTHX)
		362	{
		363	SV **svp;
		364
		365	require_pv ("Time/HiRes.pm");
		366
		367	svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
		368
		369	if (!svp) croak ("Time::HiRes is required, but missing. Caught");
		370	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
		371
		372	nvtime = INT2PTR (double (*)(), SvIV (*svp));
		373
		374	svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
		375	u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
		376	}
		377
		378	#endif
346		379
347	/** lowlevel stuff **********************************************************/	380	/** lowlevel stuff **********************************************************/
348		381
349	static SV *	382	static SV *
350	coro_get_sv (pTHX_ const char *name, int create)	383	coro_get_sv (pTHX_ const char *name, int create)
…		…
372	#if PERL_VERSION_ATLEAST (5,10,0)	405	#if PERL_VERSION_ATLEAST (5,10,0)
373	/* silence stupid and wrong 5.10 warning that I am unable to switch off */	406	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
374	get_hv (name, create);	407	get_hv (name, create);
375	#endif	408	#endif
376	return get_hv (name, create);	409	return get_hv (name, create);
377	}
378
379	/* may croak */
380	INLINE CV *
381	coro_sv_2cv (pTHX_ SV *sv)
382	{
383	HV *st;
384	GV *gvp;
385	CV *cv = sv_2cv (sv, &st, &gvp, 0);
386
387	if (!cv)
388	croak ("code reference expected");
389
390	return cv;
391	}	410	}
392		411
393	INLINE void	412	INLINE void
394	coro_times_update ()	413	coro_times_update ()
395	{	414	{
…		…
454	: 0)	473	: 0)
455		474
456	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	475	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
457	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)	476	#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
458		477
		478	INLINE MAGIC *
		479	SvSTATEhv_p (pTHX_ SV *coro)
		480	{
		481	MAGIC *mg;
		482
		483	if (expect_true (
		484	SvTYPE (coro) == SVt_PVHV
		485	&& (mg = CORO_MAGIC_state (coro))
		486	&& mg->mg_virtual == &coro_state_vtbl
		487	))
		488	return mg;
		489
		490	return 0;
		491	}
		492
459	INLINE struct coro *	493	INLINE struct coro *
460	SvSTATE_ (pTHX_ SV *coro)	494	SvSTATE_ (pTHX_ SV *coro)
461	{	495	{
462	HV *stash;
463	MAGIC *mg;	496	MAGIC *mg;
464		497
465	if (SvROK (coro))	498	if (SvROK (coro))
466	coro = SvRV (coro);	499	coro = SvRV (coro);
467		500
468	if (expect_false (SvTYPE (coro) != SVt_PVHV))	501	mg = SvSTATEhv_p (coro);
		502	if (!mg)
469	croak ("Coro::State object required");	503	croak ("Coro::State object required");
470		504
471	stash = SvSTASH (coro);
472	if (expect_false (stash != coro_stash && stash != coro_state_stash))
473	{
474	/* very slow, but rare, check */
475	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
476	croak ("Coro::State object required");
477	}
478
479	mg = CORO_MAGIC_state (coro);
480	return (struct coro *)mg->mg_ptr;	505	return (struct coro *)mg->mg_ptr;
481	}	506	}
482		507
483	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	508	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
484		509
…		…
604	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	629	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
605	}	630	}
606		631
607	/** load & save, init *******************************************************/	632	/** load & save, init *******************************************************/
608		633
		634	/* swap sv heads, at least logically */
		635	static void
		636	swap_svs (pTHX_ Coro__State c)
		637	{
		638	int i;
		639
		640	for (i = 0; i <= AvFILLp (c->swap_sv); )
		641	{
		642	SV *a = AvARRAY (c->swap_sv)[i++];
		643	SV *b = AvARRAY (c->swap_sv)[i++];
		644
		645	const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
		646	SV tmp;
		647
		648	/* swap sv_any */
		649	SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
		650
		651	/* swap sv_flags */
		652	SvFLAGS (&tmp) = SvFLAGS (a);
		653	SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
		654	SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
		655
		656	#if PERL_VERSION_ATLEAST (5,10,0)
		657	/* perl 5.10 complicates this _quite_ a bit, but it also is
		658	* much faster, so no quarrels here. alternatively, we could
		659	* sv_upgrade to avoid this.
		660	*/
		661	{
		662	/* swap sv_u */
		663	tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
		664
		665	/* if SvANY points to the head, we need to adjust the pointers,
		666	* as the pointer for a still points to b, and maybe vice versa.
		667	*/
		668	#define svany_in_head(type) \
		669	(((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
		670
		671	if (svany_in_head (SvTYPE (a)))
		672	SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
		673
		674	if (svany_in_head (SvTYPE (b)))
		675	SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
		676	}
		677	#endif
		678	}
		679	}
		680
		681	#define SWAP_SVS(coro) \
		682	if (expect_false ((coro)->swap_sv)) \
		683	swap_svs (aTHX_ (coro))
		684
609	static void	685	static void
610	on_enterleave_call (pTHX_ SV *cb);	686	on_enterleave_call (pTHX_ SV *cb);
611		687
612	static void	688	static void
613	load_perl (pTHX_ Coro__State c)	689	load_perl (pTHX_ Coro__State c)
…		…
659	int i;	735	int i;
660		736
661	for (i = 0; i <= AvFILLp (c->on_enter); ++i)	737	for (i = 0; i <= AvFILLp (c->on_enter); ++i)
662	on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);	738	on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
663	}	739	}
		740
		741	SWAP_SVS (c);
664	}	742	}
665		743
666	static void	744	static void
667	save_perl (pTHX_ Coro__State c)	745	save_perl (pTHX_ Coro__State c)
668	{	746	{
		747	SWAP_SVS (c);
		748
669	if (expect_false (c->on_leave))	749	if (expect_false (c->on_leave))
670	{	750	{
671	int i;	751	int i;
672		752
673	for (i = AvFILLp (c->on_leave); i >= 0; --i)	753	for (i = AvFILLp (c->on_leave); i >= 0; --i)
…		…
731		811
732	PUTBACK;	812	PUTBACK;
733	}	813	}
734		814
735	/* allocate some space on the context stack for our purposes */	815	/* allocate some space on the context stack for our purposes */
736	/* we manually unroll here, as usually 2 slots is enough */	816	if (expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
737	if (SLOT_COUNT >= 1) CXINC;
738	if (SLOT_COUNT >= 2) CXINC;
739	if (SLOT_COUNT >= 3) CXINC;
740	{	817	{
741	unsigned int i;	818	unsigned int i;
		819
742	for (i = 3; i < SLOT_COUNT; ++i)	820	for (i = 0; i < SLOT_COUNT; ++i)
743	CXINC;	821	CXINC;
744	}	822
745	cxstack_ix -= SLOT_COUNT; /* undo allocation */	823	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		824	}
746		825
747	c->mainstack = PL_mainstack;	826	c->mainstack = PL_mainstack;
748		827
749	{	828	{
750	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);	829	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
…		…
771	# define coro_init_stacks(thx) init_stacks ()	850	# define coro_init_stacks(thx) init_stacks ()
772	#else	851	#else
773	static void	852	static void
774	coro_init_stacks (pTHX)	853	coro_init_stacks (pTHX)
775	{	854	{
776	PL_curstackinfo = new_stackinfo(32, 8);	855	PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
777	PL_curstackinfo->si_type = PERLSI_MAIN;	856	PL_curstackinfo->si_type = PERLSI_MAIN;
778	PL_curstack = PL_curstackinfo->si_stack;	857	PL_curstack = PL_curstackinfo->si_stack;
779	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	858	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
780		859
781	PL_stack_base = AvARRAY(PL_curstack);	860	PL_stack_base = AvARRAY(PL_curstack);
…		…
888	#endif	967	#endif
889		968
890	/*	969	/*
891	* This overrides the default magic get method of %SIG elements.	970	* This overrides the default magic get method of %SIG elements.
892	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook	971	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
893	* and instead of trying to save and restore the hash elements, we just provide	972	* and instead of trying to save and restore the hash elements (extremely slow),
894	* readback here.	973	* we just provide our own readback here.
895	*/	974	*/
896	static int	975	static int
897	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)	976	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
898	{	977	{
899	const char *s = MgPV_nolen_const (mg);	978	const char *s = MgPV_nolen_const (mg);
…		…
980	slf_check_repeat (pTHX_ struct CoroSLF *frame)	1059	slf_check_repeat (pTHX_ struct CoroSLF *frame)
981	{	1060	{
982	return 1;	1061	return 1;
983	}	1062	}
984		1063
985	static UNOP coro_setup_op;	1064	static UNOP init_perl_op;
986		1065
987	static void NOINLINE /* noinline to keep it out of the transfer fast path */	1066	static void NOINLINE /* noinline to keep it out of the transfer fast path */
988	coro_setup (pTHX_ struct coro *coro)	1067	init_perl (pTHX_ struct coro *coro)
989	{	1068	{
990	/*	1069	/*
991	* emulate part of the perl startup here.	1070	* emulate part of the perl startup here.
992	*/	1071	*/
993	coro_init_stacks (aTHX);	1072	coro_init_stacks (aTHX);
…		…
1000	PL_comppad_name_fill = 0;	1079	PL_comppad_name_fill = 0;
1001	PL_comppad_name_floor = 0;	1080	PL_comppad_name_floor = 0;
1002	PL_curpm = 0;	1081	PL_curpm = 0;
1003	PL_curpad = 0;	1082	PL_curpad = 0;
1004	PL_localizing = 0;	1083	PL_localizing = 0;
1005	PL_dirty = 0;
1006	PL_restartop = 0;	1084	PL_restartop = 0;
1007	#if PERL_VERSION_ATLEAST (5,10,0)	1085	#if PERL_VERSION_ATLEAST (5,10,0)
1008	PL_parser = 0;	1086	PL_parser = 0;
1009	#endif	1087	#endif
1010	PL_hints = 0;	1088	PL_hints = 0;
1011		1089
1012	/* recreate the die/warn hooks */	1090	/* recreate the die/warn hooks */
1013	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );	1091	PL_diehook = SvREFCNT_inc (rv_diehook);
1014	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);	1092	PL_warnhook = SvREFCNT_inc (rv_warnhook);
1015		1093
1016	GvSV (PL_defgv) = newSV (0);	1094	GvSV (PL_defgv) = newSV (0);
1017	GvAV (PL_defgv) = coro->args; coro->args = 0;	1095	GvAV (PL_defgv) = coro->args; coro->args = 0;
1018	GvSV (PL_errgv) = newSV (0);	1096	GvSV (PL_errgv) = newSV (0);
1019	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);	1097	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
…		…
1040	/* this newly created coroutine might be run on an existing cctx which most	1118	/* this newly created coroutine might be run on an existing cctx which most
1041	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.	1119	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1042	*/	1120	*/
1043	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */	1121	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1044	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */	1122	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
		1123	slf_frame.destroy = 0;
1045		1124
1046	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */	1125	/* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1047	coro_setup_op.op_next = PL_op;	1126	init_perl_op.op_next = PL_op;
1048	coro_setup_op.op_type = OP_ENTERSUB;	1127	init_perl_op.op_type = OP_ENTERSUB;
1049	coro_setup_op.op_ppaddr = pp_slf;	1128	init_perl_op.op_ppaddr = pp_slf;
1050	/* no flags etc. required, as an init function won't be called */	1129	/* no flags etc. required, as an init function won't be called */
1051		1130
1052	PL_op = (OP *)&coro_setup_op;	1131	PL_op = (OP *)&init_perl_op;
1053		1132
1054	/* copy throw, in case it was set before coro_setup */	1133	/* copy throw, in case it was set before init_perl */
1055	CORO_THROW = coro->except;	1134	CORO_THROW = coro->except;
		1135
		1136	SWAP_SVS (coro);
1056		1137
1057	if (expect_false (enable_times))	1138	if (expect_false (enable_times))
1058	{	1139	{
1059	coro_times_update ();	1140	coro_times_update ();
1060	coro_times_sub (coro);	1141	coro_times_sub (coro);
…		…
1081	dounwind (-1);	1162	dounwind (-1);
1082	}	1163	}
1083	}	1164	}
1084		1165
1085	static void	1166	static void
1086	coro_destruct_perl (pTHX_ struct coro *coro)	1167	destroy_perl (pTHX_ struct coro *coro)
1087	{	1168	{
1088	SV *svf [9];	1169	SV *svf [9];
1089		1170
1090	{	1171	{
		1172	SV *old_current = SvRV (coro_current);
1091	struct coro *current = SvSTATE_current;	1173	struct coro *current = SvSTATE (old_current);
1092		1174
1093	assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));	1175	assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1094		1176
1095	save_perl (aTHX_ current);	1177	save_perl (aTHX_ current);
		1178
		1179	/* this will cause transfer_check to croak on block*/
		1180	SvRV_set (coro_current, (SV *)coro->hv);
		1181
1096	load_perl (aTHX_ coro);	1182	load_perl (aTHX_ coro);
1097		1183
1098	coro_unwind_stacks (aTHX);	1184	coro_unwind_stacks (aTHX);
		1185
		1186	/* restore swapped sv's */
		1187	SWAP_SVS (coro);
		1188
1099	coro_destruct_stacks (aTHX);	1189	coro_destruct_stacks (aTHX);
1100		1190
1101	// now save some sv's to be free'd later	1191	// now save some sv's to be free'd later
1102	svf [0] = GvSV (PL_defgv);	1192	svf [0] = GvSV (PL_defgv);
1103	svf [1] = (SV *)GvAV (PL_defgv);	1193	svf [1] = (SV *)GvAV (PL_defgv);
…		…
1108	svf [6] = (SV *)GvHV (PL_hintgv);	1198	svf [6] = (SV *)GvHV (PL_hintgv);
1109	svf [7] = PL_diehook;	1199	svf [7] = PL_diehook;
1110	svf [8] = PL_warnhook;	1200	svf [8] = PL_warnhook;
1111	assert (9 == sizeof (svf) / sizeof (*svf));	1201	assert (9 == sizeof (svf) / sizeof (*svf));
1112		1202
		1203	SvRV_set (coro_current, old_current);
		1204
1113	load_perl (aTHX_ current);	1205	load_perl (aTHX_ current);
1114	}	1206	}
1115		1207
1116	{	1208	{
1117	unsigned int i;	1209	unsigned int i;
…		…
1129	INLINE void	1221	INLINE void
1130	free_coro_mortal (pTHX)	1222	free_coro_mortal (pTHX)
1131	{	1223	{
1132	if (expect_true (coro_mortal))	1224	if (expect_true (coro_mortal))
1133	{	1225	{
1134	SvREFCNT_dec (coro_mortal);	1226	SvREFCNT_dec ((SV *)coro_mortal);
1135	coro_mortal = 0;	1227	coro_mortal = 0;
1136	}	1228	}
1137	}	1229	}
1138		1230
1139	static int	1231	static int
…		…
1328	/* somebody or something will hit me for both perl_run and PL_restartop */	1420	/* somebody or something will hit me for both perl_run and PL_restartop */
1329	PL_restartop = PL_op;	1421	PL_restartop = PL_op;
1330	perl_run (PL_curinterp);	1422	perl_run (PL_curinterp);
1331	/*	1423	/*
1332	* Unfortunately, there is no way to get at the return values of the	1424	* Unfortunately, there is no way to get at the return values of the
1333	* coro body here, as perl_run destroys these	1425	* coro body here, as perl_run destroys these. Likewise, we cannot catch
		1426	* runtime errors here, as this is just a random interpreter, not a thread.
1334	*/	1427	*/
1335		1428
1336	/*	1429	/*
1337	* If perl-run returns we assume exit() was being called or the coro	1430	* If perl-run returns we assume exit() was being called or the coro
1338	* fell off the end, which seems to be the only valid (non-bug)	1431	* fell off the end, which seems to be the only valid (non-bug)
…		…
1425	cctx_destroy (coro_cctx *cctx)	1518	cctx_destroy (coro_cctx *cctx)
1426	{	1519	{
1427	if (!cctx)	1520	if (!cctx)
1428	return;	1521	return;
1429		1522
1430	assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?	1523	assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1431		1524
1432	--cctx_count;	1525	--cctx_count;
1433	coro_destroy (&cctx->cctx);	1526	coro_destroy (&cctx->cctx);
1434		1527
1435	/* coro_transfer creates new, empty cctx's */	1528	/* coro_transfer creates new, empty cctx's */
…		…
1501	if (expect_true (prev != next))	1594	if (expect_true (prev != next))
1502	{	1595	{
1503	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1596	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1504	croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");	1597	croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1505		1598
1506	if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))	1599	if (expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1507	croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");	1600	croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1508		1601
1509	#if !PERL_VERSION_ATLEAST (5,10,0)	1602	#if !PERL_VERSION_ATLEAST (5,10,0)
1510	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1603	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1511	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");	1604	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
…		…
1545	if (expect_false (next->flags & CF_NEW))	1638	if (expect_false (next->flags & CF_NEW))
1546	{	1639	{
1547	/* need to start coroutine */	1640	/* need to start coroutine */
1548	next->flags &= ~CF_NEW;	1641	next->flags &= ~CF_NEW;
1549	/* setup coroutine call */	1642	/* setup coroutine call */
1550	coro_setup (aTHX_ next);	1643	init_perl (aTHX_ next);
1551	}	1644	}
1552	else	1645	else
1553	load_perl (aTHX_ next);	1646	load_perl (aTHX_ next);
1554		1647
1555	/* possibly untie and reuse the cctx */	1648	/* possibly untie and reuse the cctx */
…		…
1594	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1687	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1595	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1688	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1596		1689
1597	/** high level stuff ********************************************************/	1690	/** high level stuff ********************************************************/
1598		1691
		1692	/* this function is actually Coro, not Coro::State, but we call it from here */
		1693	/* because it is convenient - but it hasn't been declared yet for that reason */
1599	static int	1694	static void
		1695	coro_call_on_destroy (pTHX_ struct coro *coro);
		1696
		1697	static void
1600	coro_state_destroy (pTHX_ struct coro *coro)	1698	coro_state_destroy (pTHX_ struct coro *coro)
1601	{	1699	{
1602	if (coro->flags & CF_DESTROYED)	1700	if (coro->flags & CF_ZOMBIE)
1603	return 0;	1701	return;
1604		1702
1605	if (coro->on_destroy && !PL_dirty)
1606	coro->on_destroy (aTHX_ coro);	1703	slf_destroy (aTHX_ coro);
1607		1704
1608	coro->flags |= CF_DESTROYED;	1705	coro->flags |= CF_ZOMBIE;
1609		1706
1610	if (coro->flags & CF_READY)	1707	if (coro->flags & CF_READY)
1611	{	1708	{
1612	/* reduce nready, as destroying a ready coro effectively unreadies it */	1709	/* reduce nready, as destroying a ready coro effectively unreadies it */
1613	/* alternative: look through all ready queues and remove the coro */	1710	/* alternative: look through all ready queues and remove the coro */
1614	--coro_nready;	1711	--coro_nready;
1615	}	1712	}
1616	else	1713	else
1617	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1714	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1715
		1716	if (coro->next) coro->next->prev = coro->prev;
		1717	if (coro->prev) coro->prev->next = coro->next;
		1718	if (coro == coro_first) coro_first = coro->next;
1618		1719
1619	if (coro->mainstack	1720	if (coro->mainstack
1620	&& coro->mainstack != main_mainstack	1721	&& coro->mainstack != main_mainstack
1621	&& coro->slot	1722	&& coro->slot
1622	&& !PL_dirty)	1723	&& !PL_dirty)
1623	coro_destruct_perl (aTHX_ coro);	1724	destroy_perl (aTHX_ coro);
1624		1725
1625	cctx_destroy (coro->cctx);	1726	cctx_destroy (coro->cctx);
1626	SvREFCNT_dec (coro->startcv);	1727	SvREFCNT_dec (coro->startcv);
1627	SvREFCNT_dec (coro->args);	1728	SvREFCNT_dec (coro->args);
		1729	SvREFCNT_dec (coro->swap_sv);
1628	SvREFCNT_dec (CORO_THROW);	1730	SvREFCNT_dec (CORO_THROW);
1629		1731
1630	if (coro->next) coro->next->prev = coro->prev;	1732	coro_call_on_destroy (coro);
1631	if (coro->prev) coro->prev->next = coro->next;
1632	if (coro == coro_first) coro_first = coro->next;
1633		1733
1634	return 1;	1734	/* more destruction mayhem in coro_state_free */
1635	}	1735	}
1636		1736
1637	static int	1737	static int
1638	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1738	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1639	{	1739	{
1640	struct coro *coro = (struct coro *)mg->mg_ptr;	1740	struct coro *coro = (struct coro *)mg->mg_ptr;
1641	mg->mg_ptr = 0;	1741	mg->mg_ptr = 0;
1642		1742
1643	coro->hv = 0;
1644
1645	if (--coro->refcnt < 0)
1646	{
1647	coro_state_destroy (aTHX_ coro);	1743	coro_state_destroy (coro);
		1744	SvREFCNT_dec (coro->on_destroy);
		1745	SvREFCNT_dec (coro->status);
		1746
1648	Safefree (coro);	1747	Safefree (coro);
1649	}
1650		1748
1651	return 0;	1749	return 0;
1652	}	1750	}
1653		1751
1654	static int	1752	static int
1655	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)	1753	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1656	{	1754	{
1657	struct coro *coro = (struct coro *)mg->mg_ptr;	1755	/* called when perl clones the current process the slow way (windows process emulation) */
1658		1756	/* WE SIMply nuke the pointers in the copy, causing perl to croak */
1659	++coro->refcnt;	1757	mg->mg_ptr = 0;
		1758	mg->mg_virtual = 0;
1660		1759
1661	return 0;	1760	return 0;
1662	}	1761	}
1663		1762
1664	static MGVTBL coro_state_vtbl = {	1763	static MGVTBL coro_state_vtbl = {
…		…
1687		1786
1688	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1787	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1689	TRANSFER (ta, 1);	1788	TRANSFER (ta, 1);
1690	}	1789	}
1691		1790
1692	/*****************************************************************************/
1693	/* gensub: simple closure generation utility */
1694
1695	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1696
1697	/* create a closure from XS, returns a code reference */
1698	/* the arg can be accessed via GENSUB_ARG from the callback */
1699	/* the callback must use dXSARGS/XSRETURN */
1700	static SV *
1701	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1702	{
1703	CV *cv = (CV *)newSV (0);
1704
1705	sv_upgrade ((SV *)cv, SVt_PVCV);
1706
1707	CvANON_on (cv);
1708	CvISXSUB_on (cv);
1709	CvXSUB (cv) = xsub;
1710	GENSUB_ARG = arg;
1711
1712	return newRV_noinc ((SV *)cv);
1713	}
1714
1715	/** Coro ********************************************************************/	1791	/** Coro ********************************************************************/
1716		1792
1717	INLINE void	1793	INLINE void
1718	coro_enq (pTHX_ struct coro *coro)	1794	coro_enq (pTHX_ struct coro *coro)
1719	{	1795	{
…		…
1744	}	1820	}
1745		1821
1746	return 0;	1822	return 0;
1747	}	1823	}
1748		1824
		1825	static void
		1826	invoke_sv_ready_hook_helper (void)
		1827	{
		1828	dTHX;
		1829	dSP;
		1830
		1831	ENTER;
		1832	SAVETMPS;
		1833
		1834	PUSHMARK (SP);
		1835	PUTBACK;
		1836	call_sv (coro_readyhook, G_VOID | G_DISCARD);
		1837
		1838	FREETMPS;
		1839	LEAVE;
		1840	}
		1841
1749	static int	1842	static int
1750	api_ready (pTHX_ SV *coro_sv)	1843	api_ready (pTHX_ SV *coro_sv)
1751	{	1844	{
1752	struct coro *coro;
1753	SV *sv_hook;
1754	void (*xs_hook)(void);
1755
1756	coro = SvSTATE (coro_sv);	1845	struct coro *coro = SvSTATE (coro_sv);
1757		1846
1758	if (coro->flags & CF_READY)	1847	if (coro->flags & CF_READY)
1759	return 0;	1848	return 0;
1760		1849
1761	coro->flags |= CF_READY;	1850	coro->flags |= CF_READY;
1762		1851
1763	sv_hook = coro_nready ? 0 : coro_readyhook;
1764	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1765
1766	coro_enq (aTHX_ coro);	1852	coro_enq (aTHX_ coro);
1767	++coro_nready;
1768		1853
1769	if (sv_hook)	1854	if (!coro_nready++)
1770	{	1855	if (coroapi.readyhook)
1771	dSP;	1856	coroapi.readyhook ();
1772
1773	ENTER;
1774	SAVETMPS;
1775
1776	PUSHMARK (SP);
1777	PUTBACK;
1778	call_sv (sv_hook, G_VOID | G_DISCARD);
1779
1780	FREETMPS;
1781	LEAVE;
1782	}
1783
1784	if (xs_hook)
1785	xs_hook ();
1786		1857
1787	return 1;	1858	return 1;
1788	}	1859	}
1789		1860
1790	static int	1861	static int
…		…
1818	struct coro *next = coro_deq (aTHX);	1889	struct coro *next = coro_deq (aTHX);
1819		1890
1820	if (expect_true (next))	1891	if (expect_true (next))
1821	{	1892	{
1822	/* cannot transfer to destroyed coros, skip and look for next */	1893	/* cannot transfer to destroyed coros, skip and look for next */
1823	if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))	1894	if (expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1824	SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */	1895	SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1825	else	1896	else
1826	{	1897	{
1827	next->flags &= ~CF_READY;	1898	next->flags &= ~CF_READY;
1828	--coro_nready;	1899	--coro_nready;
…		…
1835	{	1906	{
1836	/* nothing to schedule: call the idle handler */	1907	/* nothing to schedule: call the idle handler */
1837	if (SvROK (sv_idle)	1908	if (SvROK (sv_idle)
1838	&& SvOBJECT (SvRV (sv_idle)))	1909	&& SvOBJECT (SvRV (sv_idle)))
1839	{	1910	{
		1911	if (SvRV (sv_idle) == SvRV (coro_current))
		1912	croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
		1913
1840	++coro_nready; /* hack so that api_ready doesn't invoke ready hook */	1914	++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1841	api_ready (aTHX_ SvRV (sv_idle));	1915	api_ready (aTHX_ SvRV (sv_idle));
1842	--coro_nready;	1916	--coro_nready;
1843	}	1917	}
1844	else	1918	else
1845	{	1919	{
		1920	/* TODO: deprecated, remove, cannot work reliably *//*D*/
1846	dSP;	1921	dSP;
1847		1922
1848	ENTER;	1923	ENTER;
1849	SAVETMPS;	1924	SAVETMPS;
1850		1925
…		…
1957	coro->slot->runops = RUNOPS_DEFAULT;	2032	coro->slot->runops = RUNOPS_DEFAULT;
1958	}	2033	}
1959	}	2034	}
1960		2035
1961	static void	2036	static void
		2037	coro_push_av (pTHX_ AV *av, I32 gimme_v)
		2038	{
		2039	if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
		2040	{
		2041	dSP;
		2042
		2043	if (gimme_v == G_SCALAR)
		2044	XPUSHs (AvARRAY (av)[AvFILLp (av)]);
		2045	else
		2046	{
		2047	int i;
		2048	EXTEND (SP, AvFILLp (av) + 1);
		2049
		2050	for (i = 0; i <= AvFILLp (av); ++i)
		2051	PUSHs (AvARRAY (av)[i]);
		2052	}
		2053
		2054	PUTBACK;
		2055	}
		2056	}
		2057
		2058	static void
		2059	coro_push_on_destroy (aTHX_ struct coro *coro, SV *cb)
		2060	{
		2061	if (!coro->on_destroy)
		2062	coro->on_destroy = newAV ();
		2063
		2064	av_push (coro->on_destroy, cb);
		2065	}
		2066
		2067	static void
		2068	slf_destroy_join (pTHX_ struct CoroSLF *frame)
		2069	{
		2070	SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
		2071	}
		2072
		2073	static int
		2074	slf_check_join (pTHX_ struct CoroSLF *frame)
		2075	{
		2076	struct coro *coro = (struct coro *)frame->data;
		2077
		2078	if (!coro->status)
		2079	return 1;
		2080
		2081	frame->destroy = 0;
		2082
		2083	coro_push_av (coro->status, GIMME_V);
		2084
		2085	SvREFCNT_dec ((SV *)coro->hv);
		2086
		2087	return 0;
		2088	}
		2089
		2090	static void
		2091	slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2092	{
		2093	struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
		2094
		2095	if (items > 1)
		2096	croak ("join called with too many arguments");
		2097
		2098	if (coro->status)
		2099	frame->prepare = prepare_nop;
		2100	else
		2101	{
		2102	coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
		2103	frame->prepare = prepare_schedule;
		2104	}
		2105
		2106	frame->check = slf_check_join;
		2107	frame->destroy = slf_destroy_join;
		2108	frame->data = (void *)coro;
		2109	SvREFCNT_inc (coro->hv);
		2110	}
		2111
		2112	static void
1962	coro_call_on_destroy (pTHX_ struct coro *coro)	2113	coro_call_on_destroy (pTHX_ struct coro *coro)
1963	{	2114	{
1964	SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);	2115	AV *od = coro->on_destroy;
1965	SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1966		2116
1967	if (on_destroyp)	2117	if (!od)
1968	{	2118	return;
1969	AV *on_destroy = (AV *)SvRV (*on_destroyp);
1970		2119
1971	while (AvFILLp (on_destroy) >= 0)	2120	while (AvFILLp (od) >= 0)
		2121	{
		2122	SV *cb = sv_2mortal (av_pop (od));
		2123
		2124	/* coro hv's (and only hv's at the moment) are supported as well */
		2125	if (SvSTATEhv_p (aTHX_ cb))
		2126	api_ready (aTHX_ cb);
		2127	else
1972	{	2128	{
1973	dSP; /* don't disturb outer sp */	2129	dSP; /* don't disturb outer sp */
1974	SV *cb = av_pop (on_destroy);
1975
1976	PUSHMARK (SP);	2130	PUSHMARK (SP);
1977		2131
1978	if (statusp)	2132	if (coro->status)
1979	{	2133	{
1980	int i;	2134	PUTBACK;
1981	AV *status = (AV *)SvRV (*statusp);	2135	coro_push_av (aTHX_ coro->status, G_ARRAY);
1982	EXTEND (SP, AvFILLp (status) + 1);	2136	SPAGAIN;
1983
1984	for (i = 0; i <= AvFILLp (status); ++i)
1985	PUSHs (AvARRAY (status)[i]);
1986	}	2137	}
1987		2138
1988	PUTBACK;	2139	PUTBACK;
1989	call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);	2140	call_sv (cb, G_VOID | G_DISCARD);
1990	}	2141	}
1991	}	2142	}
1992	}	2143	}
1993		2144
1994	static void	2145	static void
1995	slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)	2146	coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
1996	{	2147	{
		2148	AV *av;
		2149
		2150	if (coro->status)
		2151	{
		2152	av = coro->status;
		2153	av_clear (av);
		2154	}
		2155	else
		2156	av = coro->status = newAV ();
		2157
		2158	/* items are actually not so common, so optimise for this case */
		2159	if (items)
		2160	{
1997	int i;	2161	int i;
1998	HV *hv = (HV *)SvRV (coro_current);
1999	AV *av = newAV ();
2000		2162
2001	av_extend (av, items - 1);	2163	av_extend (av, items - 1);
		2164
2002	for (i = 0; i < items; ++i)	2165	for (i = 0; i < items; ++i)
2003	av_push (av, SvREFCNT_inc_NN (arg [i]));	2166	av_push (av, SvREFCNT_inc_NN (arg [i]));
		2167	}
		2168	}
2004		2169
2005	hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);	2170	static void
2006		2171	slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
		2172	{
2007	av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */	2173	av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2008	api_ready (aTHX_ sv_manager);	2174	api_ready (aTHX_ sv_manager);
2009		2175
2010	frame->prepare = prepare_schedule;	2176	frame->prepare = prepare_schedule;
2011	frame->check = slf_check_repeat;	2177	frame->check = slf_check_repeat;
2012		2178
2013	/* as a minor optimisation, we could unwind all stacks here */	2179	/* as a minor optimisation, we could unwind all stacks here */
2014	/* but that puts extra pressure on pp_slf, and is not worth much */	2180	/* but that puts extra pressure on pp_slf, and is not worth much */
2015	/*coro_unwind_stacks (aTHX);*/	2181	/*coro_unwind_stacks (aTHX);*/
		2182	}
		2183
		2184	static void
		2185	slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2186	{
		2187	HV *coro_hv = (HV *)SvRV (coro_current);
		2188
		2189	coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
		2190	slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
		2191	}
		2192
		2193	static void
		2194	slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2195	{
		2196	HV *coro_hv;
		2197	struct coro *coro;
		2198
		2199	if (items <= 0)
		2200	croak ("Coro::cancel called without coro object,");
		2201
		2202	coro = SvSTATE (arg [0]);
		2203	coro_hv = coro->hv;
		2204
		2205	coro_set_status (aTHX_ coro, arg + 1, items - 1);
		2206
		2207	if (expect_false (coro->flags & CF_NOCANCEL))
		2208	{
		2209	/* coro currently busy cancelling something, so just notify it */
		2210	coro->slf_frame.data = (void *)coro;
		2211
		2212	frame->prepare = prepare_nop;
		2213	frame->check = slf_check_nop;
		2214	}
		2215	else if (coro_hv == (HV *)SvRV (coro_current))
		2216	{
		2217	/* cancelling the current coro is allowed, and equals terminate */
		2218	slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
		2219	}
		2220	else
		2221	{
		2222	struct coro *self = SvSTATE_current;
		2223
		2224	/* otherwise we cancel directly, purely for speed reasons
		2225	* unfortunately, this requires some magic trickery, as
		2226	* somebody else could cancel us, so we have to fight the cancellation.
		2227	* this is ugly, and hopefully fully worth the extra speed.
		2228	* besides, I can't get the slow-but-safe version working...
		2229	*/
		2230	slf_frame.data = 0;
		2231	self->flags |= CF_NOCANCEL;
		2232	coro_state_destroy (aTHX_ coro);
		2233	self->flags &= ~CF_NOCANCEL;
		2234
		2235	if (slf_frame.data)
		2236	{
		2237	/* while we were busy we have been cancelled, so terminate */
		2238	slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
		2239	}
		2240	else
		2241	{
		2242	frame->prepare = prepare_nop;
		2243	frame->check = slf_check_nop;
		2244	}
		2245	}
		2246	}
		2247
		2248	static int
		2249	slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
		2250	{
		2251	frame->prepare = 0;
		2252	coro_unwind_stacks (aTHX);
		2253
		2254	slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
		2255
		2256	return 1;
		2257	}
		2258
		2259	static int
		2260	safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
		2261	{
		2262	if (coro->cctx)
		2263	croak ("coro inside C callback, unable to cancel at this time, caught");
		2264
		2265	if (coro->flags & CF_NEW)
		2266	{
		2267	coro_set_status (aTHX_ coro, arg, items);
		2268	coro_state_destroy (aTHX_ coro);
		2269	}
		2270	else
		2271	{
		2272	if (!coro->slf_frame.prepare)
		2273	croak ("coro outside an SLF function, unable to cancel at this time, caught");
		2274
		2275	slf_destroy (aTHX_ coro);
		2276
		2277	coro_set_status (aTHX_ coro, arg, items);
		2278	coro->slf_frame.prepare = prepare_nop;
		2279	coro->slf_frame.check = slf_check_safe_cancel;
		2280
		2281	api_ready (aTHX_ (SV *)coro->hv);
		2282	}
		2283
		2284	return 1;
2016	}	2285	}
2017		2286
2018	/*****************************************************************************/	2287	/*****************************************************************************/
2019	/* async pool handler */	2288	/* async pool handler */
2020		2289
…		…
2060	coro->saved_deffh = 0;	2329	coro->saved_deffh = 0;
2061		2330
2062	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)	2331	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2063	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2332	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2064	{	2333	{
2065	coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);	2334	slf_init_terminate_cancel_common (aTHX_ frame, hv);
2066	coro->invoke_av = newAV ();	2335	return;
2067
2068	frame->prepare = prepare_nop;
2069	}	2336	}
2070	else	2337	else
2071	{	2338	{
2072	av_clear (GvAV (PL_defgv));	2339	av_clear (GvAV (PL_defgv));
2073	hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);	2340	hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
…		…
2098		2365
2099	static void	2366	static void
2100	coro_rouse_callback (pTHX_ CV *cv)	2367	coro_rouse_callback (pTHX_ CV *cv)
2101	{	2368	{
2102	dXSARGS;	2369	dXSARGS;
2103	SV *data = (SV *)GENSUB_ARG;	2370	SV *data = (SV *)S_GENSUB_ARG;
2104		2371
2105	if (SvTYPE (SvRV (data)) != SVt_PVAV)	2372	if (SvTYPE (SvRV (data)) != SVt_PVAV)
2106	{	2373	{
2107	/* first call, set args */	2374	/* first call, set args */
2108	SV *coro = SvRV (data);	2375	SV *coro = SvRV (data);
…		…
2174	|| SvTYPE (SvRV (cb)) != SVt_PVCV	2441	|| SvTYPE (SvRV (cb)) != SVt_PVCV
2175	|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)	2442	|| CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2176	croak ("Coro::rouse_wait called with illegal callback argument,");	2443	croak ("Coro::rouse_wait called with illegal callback argument,");
2177		2444
2178	{	2445	{
2179	CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */	2446	CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2180	SV *data = (SV *)GENSUB_ARG;	2447	SV *data = (SV *)S_GENSUB_ARG;
2181		2448
2182	frame->data = (void *)data;	2449	frame->data = (void *)data;
2183	frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;	2450	frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2184	frame->check = slf_check_rouse_wait;	2451	frame->check = slf_check_rouse_wait;
2185	}	2452	}
…		…
2189	coro_new_rouse_cb (pTHX)	2456	coro_new_rouse_cb (pTHX)
2190	{	2457	{
2191	HV *hv = (HV *)SvRV (coro_current);	2458	HV *hv = (HV *)SvRV (coro_current);
2192	struct coro *coro = SvSTATE_hv (hv);	2459	struct coro *coro = SvSTATE_hv (hv);
2193	SV *data = newRV_inc ((SV *)hv);	2460	SV *data = newRV_inc ((SV *)hv);
2194	SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);	2461	SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2195		2462
2196	sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);	2463	sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2197	SvREFCNT_dec (data); /* magicext increases the refcount */	2464	SvREFCNT_dec (data); /* magicext increases the refcount */
2198		2465
2199	SvREFCNT_dec (coro->rouse_cb);	2466	SvREFCNT_dec (coro->rouse_cb);
…		…
2296	static void	2563	static void
2297	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)	2564	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298	{	2565	{
2299	frame->prepare = prepare_cede_notself;	2566	frame->prepare = prepare_cede_notself;
2300	frame->check = slf_check_nop;	2567	frame->check = slf_check_nop;
		2568	}
		2569
		2570	/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
		2571	static void
		2572	slf_destroy (pTHX_ struct coro *coro)
		2573	{
		2574	/* this callback is reserved for slf functions needing to do cleanup */
		2575	if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
		2576	coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
		2577
		2578	/*
		2579	* The on_destroy above most likely is from an SLF call.
		2580	* Since by definition the SLF call will not finish when we destroy
		2581	* the coro, we will have to force-finish it here, otherwise
		2582	* cleanup functions cannot call SLF functions.
		2583	*/
		2584	coro->slf_frame.prepare = 0;
2301	}	2585	}
2302		2586
2303	/*	2587	/*
2304	* these not obviously related functions are all rolled into one	2588	* these not obviously related functions are all rolled into one
2305	* function to increase chances that they all will call transfer with the same	2589	* function to increase chances that they all will call transfer with the same
…		…
2374	croak (0);	2658	croak (0);
2375	}	2659	}
2376		2660
2377	/* return value handling - mostly like entersub */	2661	/* return value handling - mostly like entersub */
2378	/* make sure we put something on the stack in scalar context */	2662	/* make sure we put something on the stack in scalar context */
2379	if (GIMME_V == G_SCALAR)	2663	if (GIMME_V == G_SCALAR
		2664	&& expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2380	{	2665	{
2381	dSP;	2666	dSP;
2382	SV **bot = PL_stack_base + checkmark;	2667	SV **bot = PL_stack_base + checkmark;
2383		2668
2384	if (sp == bot) /* too few, push undef */	2669	if (sp == bot) /* too few, push undef */
2385	bot [1] = &PL_sv_undef;	2670	bot [1] = &PL_sv_undef;
2386	else if (sp != bot + 1) /* too many, take last one */	2671	else /* too many, take last one */
2387	bot [1] = *sp;	2672	bot [1] = *sp;
2388		2673
2389	SP = bot + 1;	2674	SP = bot + 1;
2390		2675
2391	PUTBACK;	2676	PUTBACK;
…		…
2424	if (PL_op->op_flags & OPf_STACKED)	2709	if (PL_op->op_flags & OPf_STACKED)
2425	{	2710	{
2426	if (items > slf_arga)	2711	if (items > slf_arga)
2427	{	2712	{
2428	slf_arga = items;	2713	slf_arga = items;
2429	free (slf_argv);	2714	Safefree (slf_argv);
2430	slf_argv = malloc (slf_arga * sizeof (SV *));	2715	New (0, slf_argv, slf_arga, SV *);
2431	}	2716	}
2432		2717
2433	slf_argc = items;	2718	slf_argc = items;
2434		2719
2435	for (i = 0; i < items; ++i)	2720	for (i = 0; i < items; ++i)
…		…
2631	SvREFCNT_dec (cb);	2916	SvREFCNT_dec (cb);
2632	}	2917	}
2633	}	2918	}
2634		2919
2635	static void	2920	static void
2636	coro_semaphore_on_destroy (pTHX_ struct coro *coro)	2921	coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2637	{	2922	{
2638	/* call $sem->adjust (0) to possibly wake up some other waiters */	2923	/* call $sem->adjust (0) to possibly wake up some other waiters */
2639	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);	2924	coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2640	}	2925	}
2641		2926
2642	static int	2927	static int
2643	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)	2928	slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2644	{	2929	{
2645	AV *av = (AV *)frame->data;	2930	AV *av = (AV *)frame->data;
2646	SV *count_sv = AvARRAY (av)[0];	2931	SV *count_sv = AvARRAY (av)[0];
		2932	SV *coro_hv = SvRV (coro_current);
2647		2933
2648	/* if we are about to throw, don't actually acquire the lock, just throw */	2934	/* if we are about to throw, don't actually acquire the lock, just throw */
2649	if (CORO_THROW)	2935	if (CORO_THROW)
2650	return 0;	2936	return 0;
2651	else if (SvIVX (count_sv) > 0)	2937	else if (SvIVX (count_sv) > 0)
2652	{	2938	{
2653	SvSTATE_current->on_destroy = 0;	2939	frame->destroy = 0;
2654		2940
2655	if (acquire)	2941	if (acquire)
2656	SvIVX (count_sv) = SvIVX (count_sv) - 1;	2942	SvIVX (count_sv) = SvIVX (count_sv) - 1;
2657	else	2943	else
2658	coro_semaphore_adjust (aTHX_ av, 0);	2944	coro_semaphore_adjust (aTHX_ av, 0);
…		…
2663	{	2949	{
2664	int i;	2950	int i;
2665	/* if we were woken up but can't down, we look through the whole */	2951	/* if we were woken up but can't down, we look through the whole */
2666	/* waiters list and only add us if we aren't in there already */	2952	/* waiters list and only add us if we aren't in there already */
2667	/* this avoids some degenerate memory usage cases */	2953	/* this avoids some degenerate memory usage cases */
2668		2954	for (i = AvFILLp (av); i > 0; --i) // i > 0 is not an off-by-one bug
2669	for (i = 1; i <= AvFILLp (av); ++i)
2670	if (AvARRAY (av)[i] == SvRV (coro_current))	2955	if (AvARRAY (av)[i] == coro_hv)
2671	return 1;	2956	return 1;
2672		2957
2673	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2958	av_push (av, SvREFCNT_inc (coro_hv));
2674	return 1;	2959	return 1;
2675	}	2960	}
2676	}	2961	}
2677		2962
2678	static int	2963	static int
…		…
2701	{	2986	{
2702	av_push (av, SvREFCNT_inc (SvRV (coro_current)));	2987	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2703		2988
2704	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));	2989	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2705	frame->prepare = prepare_schedule;	2990	frame->prepare = prepare_schedule;
2706
2707	/* to avoid race conditions when a woken-up coro gets terminated */	2991	/* to avoid race conditions when a woken-up coro gets terminated */
2708	/* we arrange for a temporary on_destroy that calls adjust (0) */	2992	/* we arrange for a temporary on_destroy that calls adjust (0) */
2709	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;	2993	frame->destroy = coro_semaphore_destroy;
2710	}	2994	}
2711	}	2995	}
2712		2996
2713	static void	2997	static void
2714	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)	2998	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
…		…
2722	{	3006	{
2723	if (items >= 2)	3007	if (items >= 2)
2724	{	3008	{
2725	/* callback form */	3009	/* callback form */
2726	AV *av = (AV *)SvRV (arg [0]);	3010	AV *av = (AV *)SvRV (arg [0]);
2727	CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);	3011	SV *cb_cv = s_get_cv_croak (arg [1]);
2728		3012
2729	av_push (av, SvREFCNT_inc_NN (cb_cv));	3013	av_push (av, SvREFCNT_inc_NN (cb_cv));
2730		3014
2731	if (SvIVX (AvARRAY (av)[0]) > 0)	3015	if (SvIVX (AvARRAY (av)[0]) > 0)
2732	coro_semaphore_adjust (aTHX_ av, 0);	3016	coro_semaphore_adjust (aTHX_ av, 0);
…		…
2792	{	3076	{
2793	AV *av = (AV *)SvRV (arg [0]);	3077	AV *av = (AV *)SvRV (arg [0]);
2794		3078
2795	if (items >= 2)	3079	if (items >= 2)
2796	{	3080	{
2797	CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);	3081	SV *cb_cv = s_get_cv_croak (arg [1]);
2798	av_push (av, SvREFCNT_inc_NN (cb_cv));	3082	av_push (av, SvREFCNT_inc_NN (cb_cv));
2799		3083
2800	if (SvIVX (AvARRAY (av)[0]))	3084	if (SvIVX (AvARRAY (av)[0]))
2801	coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */	3085	coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2802		3086
2803	frame->prepare = prepare_nop;	3087	frame->prepare = prepare_nop;
2804	frame->check = slf_check_nop;	3088	frame->check = slf_check_nop;
2805	}	3089	}
2806	else if (SvIVX (AvARRAY (av)[0]))	3090	else if (SvIVX (AvARRAY (av)[0]))
…		…
2837		3121
2838	static void	3122	static void
2839	coro_aio_callback (pTHX_ CV *cv)	3123	coro_aio_callback (pTHX_ CV *cv)
2840	{	3124	{
2841	dXSARGS;	3125	dXSARGS;
2842	AV *state = (AV *)GENSUB_ARG;	3126	AV *state = (AV *)S_GENSUB_ARG;
2843	SV *coro = av_pop (state);	3127	SV *coro = av_pop (state);
2844	SV *data_sv = newSV (sizeof (struct io_state));	3128	SV *data_sv = newSV (sizeof (struct io_state));
2845		3129
2846	av_extend (state, items - 1);	3130	av_extend (state, items - 1);
2847		3131
…		…
2961		3245
2962	for (i = 0; i < items; ++i)	3246	for (i = 0; i < items; ++i)
2963	PUSHs (arg [i]);	3247	PUSHs (arg [i]);
2964		3248
2965	/* now push the callback closure */	3249	/* now push the callback closure */
2966	PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));	3250	PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2967		3251
2968	/* now call the AIO function - we assume our request is uncancelable */	3252	/* now call the AIO function - we assume our request is uncancelable */
2969	PUTBACK;	3253	PUTBACK;
2970	call_sv ((SV *)req, G_VOID | G_DISCARD);	3254	call_sv ((SV *)req, G_VOID | G_DISCARD);
2971	}	3255	}
2972		3256
2973	/* now that the requets is going, we loop toll we have a result */	3257	/* now that the request is going, we loop till we have a result */
2974	frame->data = (void *)state;	3258	frame->data = (void *)state;
2975	frame->prepare = prepare_schedule;	3259	frame->prepare = prepare_schedule;
2976	frame->check = slf_check_aio_req;	3260	frame->check = slf_check_aio_req;
2977	}	3261	}
2978		3262
…		…
2989	/*****************************************************************************/	3273	/*****************************************************************************/
2990		3274
2991	#if CORO_CLONE	3275	#if CORO_CLONE
2992	# include "clone.c"	3276	# include "clone.c"
2993	#endif	3277	#endif
		3278
		3279	/*****************************************************************************/
		3280
		3281	static SV *
		3282	coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
		3283	{
		3284	SV *coro_sv;
		3285	struct coro *coro;
		3286	MAGIC *mg;
		3287	HV *hv;
		3288	SV *cb;
		3289	int i;
		3290
		3291	if (argc > 0)
		3292	{
		3293	cb = s_get_cv_croak (argv [0]);
		3294
		3295	if (!is_coro)
		3296	{
		3297	if (CvISXSUB (cb))
		3298	croak ("Coro::State doesn't support XS functions as coroutine start, caught");
		3299
		3300	if (!CvROOT (cb))
		3301	croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
		3302	}
		3303	}
		3304
		3305	Newz (0, coro, 1, struct coro);
		3306	coro->args = newAV ();
		3307	coro->flags = CF_NEW;
		3308
		3309	if (coro_first) coro_first->prev = coro;
		3310	coro->next = coro_first;
		3311	coro_first = coro;
		3312
		3313	coro->hv = hv = newHV ();
		3314	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		3315	mg->mg_flags |= MGf_DUP;
		3316	coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
		3317
		3318	if (argc > 0)
		3319	{
		3320	av_extend (coro->args, argc + is_coro - 1);
		3321
		3322	if (is_coro)
		3323	{
		3324	av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
		3325	cb = (SV *)cv_coro_run;
		3326	}
		3327
		3328	coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
		3329
		3330	for (i = 1; i < argc; i++)
		3331	av_push (coro->args, newSVsv (argv [i]));
		3332	}
		3333
		3334	return coro_sv;
		3335	}
2994		3336
2995	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	3337	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2996		3338
2997	PROTOTYPES: DISABLE	3339	PROTOTYPES: DISABLE
2998		3340
…		…
3051	coroapi.prepare_nop = prepare_nop;	3393	coroapi.prepare_nop = prepare_nop;
3052	coroapi.prepare_schedule = prepare_schedule;	3394	coroapi.prepare_schedule = prepare_schedule;
3053	coroapi.prepare_cede = prepare_cede;	3395	coroapi.prepare_cede = prepare_cede;
3054	coroapi.prepare_cede_notself = prepare_cede_notself;	3396	coroapi.prepare_cede_notself = prepare_cede_notself;
3055		3397
3056	{	3398	time_init (aTHX);
3057	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3058
3059	if (!svp) croak ("Time::HiRes is required");
3060	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3061
3062	nvtime = INT2PTR (double (*)(), SvIV (*svp));
3063
3064	svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3065	u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3066	}
3067		3399
3068	assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));	3400	assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3069	}	3401	}
3070		3402
3071	SV *	3403	SV *
3072	new (char *klass, ...)	3404	new (SV *klass, ...)
3073	ALIAS:	3405	ALIAS:
3074	Coro::new = 1	3406	Coro::new = 1
3075	CODE:	3407	CODE:
3076	{	3408	RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3077	struct coro *coro;	3409	OUTPUT:
3078	MAGIC *mg;
3079	HV *hv;
3080	CV *cb;
3081	int i;
3082
3083	if (items > 1)
3084	{
3085	cb = coro_sv_2cv (aTHX_ ST (1));
3086
3087	if (!ix)
3088	{
3089	if (CvISXSUB (cb))
3090	croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3091
3092	if (!CvROOT (cb))
3093	croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3094	}
3095	}
3096
3097	Newz (0, coro, 1, struct coro);
3098	coro->args = newAV ();
3099	coro->flags = CF_NEW;
3100
3101	if (coro_first) coro_first->prev = coro;
3102	coro->next = coro_first;
3103	coro_first = coro;
3104
3105	coro->hv = hv = newHV ();
3106	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3107	mg->mg_flags |= MGf_DUP;
3108	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
3109
3110	if (items > 1)
3111	{
3112	av_extend (coro->args, items - 1 + ix - 1);
3113
3114	if (ix)
3115	{
3116	av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3117	cb = cv_coro_run;
3118	}
3119
3120	coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3121
3122	for (i = 2; i < items; i++)
3123	av_push (coro->args, newSVsv (ST (i)));
3124	}
3125	}
3126	OUTPUT:
3127	RETVAL	3410	RETVAL
3128		3411
3129	void	3412	void
3130	transfer (...)	3413	transfer (...)
3131	PROTOTYPE: $$	3414	PROTOTYPE: $$
3132	CODE:	3415	CODE:
3133	CORO_EXECUTE_SLF_XS (slf_init_transfer);	3416	CORO_EXECUTE_SLF_XS (slf_init_transfer);
3134
3135	bool
3136	_destroy (SV *coro_sv)
3137	CODE:
3138	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3139	OUTPUT:
3140	RETVAL
3141		3417
3142	void	3418	void
3143	_exit (int code)	3419	_exit (int code)
3144	PROTOTYPE: $	3420	PROTOTYPE: $
3145	CODE:	3421	CODE:
…		…
3221	CODE:	3497	CODE:
3222	{	3498	{
3223	if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))	3499	if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3224	{	3500	{
3225	struct coro *current = SvSTATE_current;	3501	struct coro *current = SvSTATE_current;
		3502	struct CoroSLF slf_save;
3226		3503
3227	if (current != coro)	3504	if (current != coro)
3228	{	3505	{
3229	PUTBACK;	3506	PUTBACK;
3230	save_perl (aTHX_ current);	3507	save_perl (aTHX_ current);
3231	load_perl (aTHX_ coro);	3508	load_perl (aTHX_ coro);
		3509	/* the coro is most likely in an active SLF call.
		3510	* while not strictly required (the code we execute is
		3511	* not allowed to call any SLF functions), it's cleaner
		3512	* to reinitialise the slf_frame and restore it later.
		3513	* This might one day allow us to actually do SLF calls
		3514	* from code executed here.
		3515	*/
		3516	slf_save = slf_frame;
		3517	slf_frame.prepare = 0;
3232	SPAGAIN;	3518	SPAGAIN;
3233	}	3519	}
3234		3520
3235	PUSHSTACK;	3521	PUSHSTACK;
3236		3522
…		…
3246	SPAGAIN;	3532	SPAGAIN;
3247		3533
3248	if (current != coro)	3534	if (current != coro)
3249	{	3535	{
3250	PUTBACK;	3536	PUTBACK;
		3537	slf_frame = slf_save;
3251	save_perl (aTHX_ coro);	3538	save_perl (aTHX_ coro);
3252	load_perl (aTHX_ current);	3539	load_perl (aTHX_ current);
3253	SPAGAIN;	3540	SPAGAIN;
3254	}	3541	}
3255	}	3542	}
…		…
3260	PROTOTYPE: $	3547	PROTOTYPE: $
3261	ALIAS:	3548	ALIAS:
3262	is_ready = CF_READY	3549	is_ready = CF_READY
3263	is_running = CF_RUNNING	3550	is_running = CF_RUNNING
3264	is_new = CF_NEW	3551	is_new = CF_NEW
3265	is_destroyed = CF_DESTROYED	3552	is_destroyed = CF_ZOMBIE
		3553	is_zombie = CF_ZOMBIE
3266	is_suspended = CF_SUSPENDED	3554	is_suspended = CF_SUSPENDED
3267	CODE:	3555	CODE:
3268	RETVAL = boolSV (coro->flags & ix);	3556	RETVAL = boolSV (coro->flags & ix);
3269	OUTPUT:	3557	OUTPUT:
3270	RETVAL	3558	RETVAL
3271		3559
3272	void	3560	void
3273	throw (Coro::State self, SV *throw = &PL_sv_undef)	3561	throw (Coro::State self, SV *exception = &PL_sv_undef)
3274	PROTOTYPE: $;$	3562	PROTOTYPE: $;$
3275	CODE:	3563	CODE:
3276	{	3564	{
3277	struct coro *current = SvSTATE_current;	3565	struct coro *current = SvSTATE_current;
3278	SV **throwp = self == current ? &CORO_THROW : &self->except;	3566	SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3279	SvREFCNT_dec (*throwp);	3567	SvREFCNT_dec (*exceptionp);
3280	SvGETMAGIC (throw);	3568	SvGETMAGIC (exception);
3281	*throwp = SvOK (throw) ? newSVsv (throw) : 0;	3569	*exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3282	}	3570	}
3283		3571
3284	void	3572	void
3285	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	3573	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3286	PROTOTYPE: $;$	3574	PROTOTYPE: $;$
…		…
3341		3629
3342	void	3630	void
3343	cancel (Coro::State self)	3631	cancel (Coro::State self)
3344	CODE:	3632	CODE:
3345	coro_state_destroy (aTHX_ self);	3633	coro_state_destroy (aTHX_ self);
3346	coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3347
3348		3634
3349	SV *	3635	SV *
3350	enable_times (int enabled = enable_times)	3636	enable_times (int enabled = enable_times)
3351	CODE:	3637	CODE:
3352	{	3638	{
…		…
3381		3667
3382	if (expect_false (current == self))	3668	if (expect_false (current == self))
3383	coro_times_sub (SvSTATE (coro_current));	3669	coro_times_sub (SvSTATE (coro_current));
3384	}	3670	}
3385		3671
		3672	void
		3673	swap_sv (Coro::State coro, SV *sv, SV *swapsv)
		3674	CODE:
		3675	{
		3676	struct coro *current = SvSTATE_current;
		3677
		3678	if (current == coro)
		3679	SWAP_SVS (current);
		3680
		3681	if (!coro->swap_sv)
		3682	coro->swap_sv = newAV ();
		3683
		3684	av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
		3685	av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
		3686
		3687	if (current == coro)
		3688	SWAP_SVS (current);
		3689	}
		3690
		3691
3386	MODULE = Coro::State PACKAGE = Coro	3692	MODULE = Coro::State PACKAGE = Coro
3387		3693
3388	BOOT:	3694	BOOT:
3389	{	3695	{
3390	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);	3696	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3391	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);	3697	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3392	cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);	3698	cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3393	cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3394	coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);	3699	coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3395	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);	3700	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3396	av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);	3701	av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3397	sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);	3702	sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3398	sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);	3703	sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3399		3704
3400	sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);	3705	sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3401	sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);	3706	sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3402	cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);	3707	cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3403	cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);	3708	CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3404		3709
3405	coro_stash = gv_stashpv ("Coro", TRUE);	3710	coro_stash = gv_stashpv ("Coro", TRUE);
3406		3711
3407	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));	3712	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3408	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));	3713	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3409	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));	3714	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
…		…
3427	sv_setiv (sv, (IV)&coroapi);	3732	sv_setiv (sv, (IV)&coroapi);
3428	SvREADONLY_on (sv);	3733	SvREADONLY_on (sv);
3429	}	3734	}
3430	}	3735	}
3431		3736
		3737	SV *
		3738	async (...)
		3739	PROTOTYPE: &@
		3740	CODE:
		3741	RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
		3742	api_ready (aTHX_ RETVAL);
		3743	OUTPUT:
		3744	RETVAL
		3745
		3746	void
		3747	_destroy (Coro::State coro)
		3748	CODE:
		3749	/* used by the manager thread */
		3750	coro_state_destroy (aTHX_ coro);
		3751
		3752	void
		3753	on_destroy (Coro::State coro, SV *cb)
		3754	CODE:
		3755	coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
		3756
		3757	void
		3758	join (...)
		3759	CODE:
		3760	CORO_EXECUTE_SLF_XS (slf_init_join);
		3761
3432	void	3762	void
3433	terminate (...)	3763	terminate (...)
3434	CODE:	3764	CODE:
3435	CORO_EXECUTE_SLF_XS (slf_init_terminate);	3765	CORO_EXECUTE_SLF_XS (slf_init_terminate);
		3766
		3767	void
		3768	cancel (...)
		3769	CODE:
		3770	CORO_EXECUTE_SLF_XS (slf_init_cancel);
		3771
		3772	int
		3773	safe_cancel (Coro::State self, ...)
		3774	C_ARGS: aTHX_ self, &ST (1), items - 1
3436		3775
3437	void	3776	void
3438	schedule (...)	3777	schedule (...)
3439	CODE:	3778	CODE:
3440	CORO_EXECUTE_SLF_XS (slf_init_schedule);	3779	CORO_EXECUTE_SLF_XS (slf_init_schedule);
…		…
3470	_set_readyhook (SV *hook)	3809	_set_readyhook (SV *hook)
3471	PROTOTYPE: $	3810	PROTOTYPE: $
3472	CODE:	3811	CODE:
3473	SvREFCNT_dec (coro_readyhook);	3812	SvREFCNT_dec (coro_readyhook);
3474	SvGETMAGIC (hook);	3813	SvGETMAGIC (hook);
		3814	if (SvOK (hook))
		3815	{
3475	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	3816	coro_readyhook = newSVsv (hook);
		3817	CORO_READYHOOK = invoke_sv_ready_hook_helper;
		3818	}
		3819	else
		3820	{
		3821	coro_readyhook = 0;
		3822	CORO_READYHOOK = 0;
		3823	}
3476		3824
3477	int	3825	int
3478	prio (Coro::State coro, int newprio = 0)	3826	prio (Coro::State coro, int newprio = 0)
3479	PROTOTYPE: $;$	3827	PROTOTYPE: $;$
3480	ALIAS:	3828	ALIAS:
…		…
3544	for (i = 1; i < items; ++i)	3892	for (i = 1; i < items; ++i)
3545	av_push (av, SvREFCNT_inc_NN (ST (i)));	3893	av_push (av, SvREFCNT_inc_NN (ST (i)));
3546		3894
3547	if ((SV *)hv == &PL_sv_undef)	3895	if ((SV *)hv == &PL_sv_undef)
3548	{	3896	{
3549	PUSHMARK (SP);	3897	SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3550	EXTEND (SP, 2);
3551	PUSHs (sv_Coro);
3552	PUSHs ((SV *)cv_pool_handler);
3553	PUTBACK;
3554	call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3555	SPAGAIN;
3556
3557	hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));	3898	hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
		3899	SvREFCNT_dec (sv);
3558	}	3900	}
3559		3901
3560	{	3902	{
3561	struct coro *coro = SvSTATE_hv (hv);	3903	struct coro *coro = SvSTATE_hv (hv);
3562		3904
…		…
3596	CODE:	3938	CODE:
3597	{	3939	{
3598	struct coro *coro = SvSTATE_current;	3940	struct coro *coro = SvSTATE_current;
3599	AV **avp = ix ? &coro->on_leave : &coro->on_enter;	3941	AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3600		3942
3601	block = (SV *)coro_sv_2cv (aTHX_ block);	3943	block = s_get_cv_croak (block);
3602		3944
3603	if (!*avp)	3945	if (!*avp)
3604	*avp = newAV ();	3946	*avp = newAV ();
3605		3947
3606	av_push (*avp, SvREFCNT_inc (block));	3948	av_push (*avp, SvREFCNT_inc (block));
…		…
3806		4148
3807	void	4149	void
3808	_register (char *target, char *proto, SV *req)	4150	_register (char *target, char *proto, SV *req)
3809	CODE:	4151	CODE:
3810	{	4152	{
3811	CV *req_cv = coro_sv_2cv (aTHX_ req);	4153	SV *req_cv = s_get_cv_croak (req);
3812	/* newXSproto doesn't return the CV on 5.8 */	4154	/* newXSproto doesn't return the CV on 5.8 */
3813	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);	4155	CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3814	sv_setpv ((SV *)slf_cv, proto);	4156	sv_setpv ((SV *)slf_cv, proto);
3815	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);	4157	sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3816	}	4158	}
3817		4159
		4160	MODULE = Coro::State PACKAGE = Coro::Select
		4161
		4162	void
		4163	patch_pp_sselect ()
		4164	CODE:
		4165	if (!coro_old_pp_sselect)
		4166	{
		4167	coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
		4168	coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
		4169	PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
		4170	}
		4171
		4172	void
		4173	unpatch_pp_sselect ()
		4174	CODE:
		4175	if (coro_old_pp_sselect)
		4176	{
		4177	PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
		4178	coro_old_pp_sselect = 0;
		4179	}
		4180

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