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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.244 by root, Sun Sep 21 18:29:39 2008 UTC vs.
Revision 1.280 by root, Sun Nov 16 09:43:18 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
141	static perl_mutex coro_mutex;	147	# if CORO_PTHREAD
142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	148	static void *coro_thx;
143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	149	# endif
144	#else
145	# define LOCK (void)0
146	# define UNLOCK (void)0
147	#endif	150	#endif
148		151
149	/* helper storage struct for Coro::AIO */	152	/* helper storage struct for Coro::AIO */
150	struct io_state	153	struct io_state
151	{	154	{
		155	AV *res;
152	int errorno;	156	int errorno;
153	I32 laststype;	157	I32 laststype; /* U16 in 5.10.0 */
154	int laststatval;	158	int laststatval;
155	Stat_t statcache;	159	Stat_t statcache;
156	};	160	};
157		161
		162	static double (*nvtime)(); /* so why doesn't it take void? */
		163
		164	static U32 cctx_gen;
158	static size_t coro_stacksize = CORO_STACKSIZE;	165	static size_t cctx_stacksize = CORO_STACKSIZE;
159	static struct CoroAPI coroapi;	166	static struct CoroAPI coroapi;
160	static AV *main_mainstack; /* used to differentiate between $main and others */	167	static AV *main_mainstack; /* used to differentiate between $main and others */
161	static JMPENV *main_top_env;	168	static JMPENV *main_top_env;
162	static HV *coro_state_stash, *coro_stash;	169	static HV *coro_state_stash, *coro_stash;
163	static volatile SV *coro_mortal; /* will be freed after next transfer */	170	static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
		171	static volatile struct coro *transfer_next;
164		172
165	static GV *irsgv; /* $/ */	173	static GV *irsgv; /* $/ */
166	static GV *stdoutgv; /* *STDOUT */	174	static GV *stdoutgv; /* *STDOUT */
167	static SV *rv_diehook;	175	static SV *rv_diehook;
168	static SV *rv_warnhook;	176	static SV *rv_warnhook;
…		…
187	CC_TRACE_LINE = 0x10, /* trace each statement */	195	CC_TRACE_LINE = 0x10, /* trace each statement */
188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	196	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189	};	197	};
190		198
191	/* this is a structure representing a c-level coroutine */	199	/* this is a structure representing a c-level coroutine */
192	typedef struct coro_cctx {	200	typedef struct coro_cctx
		201	{
193	struct coro_cctx *next;	202	struct coro_cctx *next;
194		203
195	/* the stack */	204	/* the stack */
196	void *sptr;	205	void *sptr;
197	size_t ssize;	206	size_t ssize;
…		…
200	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	209	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	210	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202	JMPENV *top_env;	211	JMPENV *top_env;
203	coro_context cctx;	212	coro_context cctx;
204		213
		214	U32 gen;
205	#if CORO_USE_VALGRIND	215	#if CORO_USE_VALGRIND
206	int valgrind_id;	216	int valgrind_id;
207	#endif	217	#endif
208	unsigned char flags;	218	unsigned char flags;
209	} coro_cctx;	219	} coro_cctx;
…		…
214	CF_NEW = 0x0004, /* has never been switched to */	224	CF_NEW = 0x0004, /* has never been switched to */
215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	225	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216	};	226	};
217		227
218	/* the structure where most of the perl state is stored, overlaid on the cxstack */	228	/* the structure where most of the perl state is stored, overlaid on the cxstack */
219	typedef struct {	229	typedef struct
		230	{
220	SV *defsv;	231	SV *defsv;
221	AV *defav;	232	AV *defav;
222	SV *errsv;	233	SV *errsv;
223	SV *irsgv;	234	SV *irsgv;
224	#define VAR(name,type) type name;	235	#define VAR(name,type) type name;
…		…
228		239
229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	240	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230		241
231	/* this is a structure representing a perl-level coroutine */	242	/* this is a structure representing a perl-level coroutine */
232	struct coro {	243	struct coro {
233	/* the c coroutine allocated to this perl coroutine, if any */	244	/* the C coroutine allocated to this perl coroutine, if any */
234	coro_cctx *cctx;	245	coro_cctx *cctx;
235		246
236	/* process data */	247	/* process data */
		248	struct CoroSLF slf_frame; /* saved slf frame */
237	AV *mainstack;	249	AV *mainstack;
238	perl_slots *slot; /* basically the saved sp */	250	perl_slots *slot; /* basically the saved sp */
239		251
240	AV *args; /* data associated with this coroutine (initial args) */	252	AV *args; /* data associated with this coroutine (initial args) */
241	int refcnt; /* coroutines are refcounted, yes */	253	int refcnt; /* coroutines are refcounted, yes */
242	int flags; /* CF_ flags */	254	int flags; /* CF_ flags */
243	HV *hv; /* the perl hash associated with this coro, if any */	255	HV *hv; /* the perl hash associated with this coro, if any */
		256	void (*on_destroy)(pTHX_ struct coro *coro);
244		257
245	/* statistics */	258	/* statistics */
246	int usecount; /* number of transfers to this coro */	259	int usecount; /* number of transfers to this coro */
247		260
248	/* coro process data */	261	/* coro process data */
…		…
256	struct coro *next, *prev;	269	struct coro *next, *prev;
257	};	270	};
258		271
259	typedef struct coro *Coro__State;	272	typedef struct coro *Coro__State;
260	typedef struct coro *Coro__State_or_hashref;	273	typedef struct coro *Coro__State_or_hashref;
		274
		275	static struct CoroSLF slf_frame; /* the current slf frame */
261		276
262	/** Coro ********************************************************************/	277	/** Coro ********************************************************************/
263		278
264	#define PRIO_MAX 3	279	#define PRIO_MAX 3
265	#define PRIO_HIGH 1	280	#define PRIO_HIGH 1
…		…
269	#define PRIO_MIN -4	284	#define PRIO_MIN -4
270		285
271	/* for Coro.pm */	286	/* for Coro.pm */
272	static SV *coro_current;	287	static SV *coro_current;
273	static SV *coro_readyhook;	288	static SV *coro_readyhook;
274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	289	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275	static int coro_nready;
276	static struct coro *coro_first;	290	static struct coro *coro_first;
		291	#define coro_nready coroapi.nready
277		292
278	/** lowlevel stuff **********************************************************/	293	/** lowlevel stuff **********************************************************/
279		294
280	static SV *	295	static SV *
281	coro_get_sv (pTHX_ const char *name, int create)	296	coro_get_sv (pTHX_ const char *name, int create)
…		…
321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	336	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322	#endif	337	#endif
323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	338	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324	--AvFILLp (padlist);	339	--AvFILLp (padlist);
325		340
326	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	341	av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327	av_store (newpadlist, 1, (SV *)newpad);	342	av_store (newpadlist, 1, (SV *)newpad);
328		343
329	return newpadlist;	344	return newpadlist;
330	}	345	}
331		346
…		…
361		376
362	/* casting is fun. */	377	/* casting is fun. */
363	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	378	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364	free_padlist (aTHX_ padlist);	379	free_padlist (aTHX_ padlist);
365		380
366	SvREFCNT_dec (av);	381	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
367		382
368	return 0;	383	return 0;
369	}	384	}
370		385
371	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	386	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
…		…
374	static MGVTBL coro_cv_vtbl = {	389	static MGVTBL coro_cv_vtbl = {
375	0, 0, 0, 0,	390	0, 0, 0, 0,
376	coro_cv_free	391	coro_cv_free
377	};	392	};
378		393
379	#define CORO_MAGIC(sv,type) \	394	#define CORO_MAGIC(sv, type) \
380	SvMAGIC (sv) \	395	SvMAGIC (sv) \
381	? SvMAGIC (sv)->mg_type == type \	396	? SvMAGIC (sv)->mg_type == type \
382	? SvMAGIC (sv) \	397	? SvMAGIC (sv) \
383	: mg_find (sv, type) \	398	: mg_find (sv, type) \
384	: 0	399	: 0
385		400
386	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	401	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
387	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	402	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
388		403
389	static struct coro *	404	INLINE struct coro *
390	SvSTATE_ (pTHX_ SV *coro)	405	SvSTATE_ (pTHX_ SV *coro)
391	{	406	{
392	HV *stash;	407	HV *stash;
393	MAGIC *mg;	408	MAGIC *mg;
394		409
…		…
485	CvPADLIST (cv) = (AV *)POPs;	500	CvPADLIST (cv) = (AV *)POPs;
486	}	501	}
487		502
488	PUTBACK;	503	PUTBACK;
489	}	504	}
		505
		506	slf_frame = c->slf_frame;
490	}	507	}
491		508
492	static void	509	static void
493	save_perl (pTHX_ Coro__State c)	510	save_perl (pTHX_ Coro__State c)
494	{	511	{
		512	c->slf_frame = slf_frame;
		513
495	{	514	{
496	dSP;	515	dSP;
497	I32 cxix = cxstack_ix;	516	I32 cxix = cxstack_ix;
498	PERL_CONTEXT *ccstk = cxstack;	517	PERL_CONTEXT *ccstk = cxstack;
499	PERL_SI *top_si = PL_curstackinfo;	518	PERL_SI *top_si = PL_curstackinfo;
…		…
566	#undef VAR	585	#undef VAR
567	}	586	}
568	}	587	}
569		588
570	/*	589	/*
571	* allocate various perl stacks. This is an exact copy	590	* allocate various perl stacks. This is almost an exact copy
572	* of perl.c:init_stacks, except that it uses less memory	591	* of perl.c:init_stacks, except that it uses less memory
573	* on the (sometimes correct) assumption that coroutines do	592	* on the (sometimes correct) assumption that coroutines do
574	* not usually need a lot of stackspace.	593	* not usually need a lot of stackspace.
575	*/	594	*/
576	#if CORO_PREFER_PERL_FUNCTIONS	595	#if CORO_PREFER_PERL_FUNCTIONS
…		…
619		638
620	/*	639	/*
621	* destroy the stacks, the callchain etc...	640	* destroy the stacks, the callchain etc...
622	*/	641	*/
623	static void	642	static void
624	coro_destroy_stacks (pTHX)	643	coro_destruct_stacks (pTHX)
625	{	644	{
626	while (PL_curstackinfo->si_next)	645	while (PL_curstackinfo->si_next)
627	PL_curstackinfo = PL_curstackinfo->si_next;	646	PL_curstackinfo = PL_curstackinfo->si_next;
628		647
629	while (PL_curstackinfo)	648	while (PL_curstackinfo)
…		…
666	#undef VAR	685	#undef VAR
667	}	686	}
668	else	687	else
669	slot = coro->slot;	688	slot = coro->slot;
670		689
		690	if (slot)
		691	{
671	rss += sizeof (slot->curstackinfo);	692	rss += sizeof (slot->curstackinfo);
672	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	693	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
673	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);	694	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
674	rss += slot->tmps_max * sizeof (SV *);	695	rss += slot->tmps_max * sizeof (SV *);
675	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);	696	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
676	rss += slot->scopestack_max * sizeof (I32);	697	rss += slot->scopestack_max * sizeof (I32);
677	rss += slot->savestack_max * sizeof (ANY);	698	rss += slot->savestack_max * sizeof (ANY);
678		699
679	#if !PERL_VERSION_ATLEAST (5,10,0)	700	#if !PERL_VERSION_ATLEAST (5,10,0)
680	rss += slot->retstack_max * sizeof (OP *);	701	rss += slot->retstack_max * sizeof (OP *);
681	#endif	702	#endif
		703	}
682	}	704	}
683		705
684	return rss;	706	return rss;
685	}	707	}
686		708
…		…
775		797
776	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	798	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
777	}	799	}
778		800
779	static void	801	static void
		802	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		803	{
		804	/* kind of mega-hacky, but works */
		805	ta->next = ta->prev = (struct coro *)ta;
		806	}
		807
		808	static int
		809	slf_check_nop (pTHX_ struct CoroSLF *frame)
		810	{
		811	return 0;
		812	}
		813
		814	static void
780	coro_setup (pTHX_ struct coro *coro)	815	coro_setup (pTHX_ struct coro *coro)
781	{	816	{
782	/*	817	/*
783	* emulate part of the perl startup here.	818	* emulate part of the perl startup here.
784	*/	819	*/
…		…
804	GvSV (PL_defgv) = newSV (0);	839	GvSV (PL_defgv) = newSV (0);
805	GvAV (PL_defgv) = coro->args; coro->args = 0;	840	GvAV (PL_defgv) = coro->args; coro->args = 0;
806	GvSV (PL_errgv) = newSV (0);	841	GvSV (PL_errgv) = newSV (0);
807	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);	842	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
808	PL_rs = newSVsv (GvSV (irsgv));	843	PL_rs = newSVsv (GvSV (irsgv));
809	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);	844	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
810		845
811	{	846	{
812	dSP;	847	dSP;
813	LOGOP myop;	848	UNOP myop;
814		849
815	Zero (&myop, 1, LOGOP);	850	Zero (&myop, 1, UNOP);
816	myop.op_next = Nullop;	851	myop.op_next = Nullop;
817	myop.op_flags = OPf_WANT_VOID;	852	myop.op_flags = OPf_WANT_VOID;
818		853
819	PUSHMARK (SP);	854	PUSHMARK (SP);
820	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	855	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
823	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	858	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
824	SPAGAIN;	859	SPAGAIN;
825	}	860	}
826		861
827	/* this newly created coroutine might be run on an existing cctx which most	862	/* this newly created coroutine might be run on an existing cctx which most
828	* likely was suspended in set_stacklevel, called from entersub.	863	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
829	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
830	* so we ENTER here for symmetry
831	*/	864	*/
832	ENTER;	865	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		866	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
833	}	867	}
834		868
835	static void	869	static void
836	coro_destroy (pTHX_ struct coro *coro)	870	coro_destruct (pTHX_ struct coro *coro)
837	{	871	{
838	if (!IN_DESTRUCT)	872	if (!IN_DESTRUCT)
839	{	873	{
840	/* restore all saved variables and stuff */	874	/* restore all saved variables and stuff */
841	LEAVE_SCOPE (0);	875	LEAVE_SCOPE (0);
…		…
863	SvREFCNT_dec (PL_warnhook);	897	SvREFCNT_dec (PL_warnhook);
864		898
865	SvREFCNT_dec (coro->saved_deffh);	899	SvREFCNT_dec (coro->saved_deffh);
866	SvREFCNT_dec (coro->throw);	900	SvREFCNT_dec (coro->throw);
867		901
868	coro_destroy_stacks (aTHX);	902	coro_destruct_stacks (aTHX);
869	}	903	}
870		904
871	static void	905	INLINE void
872	free_coro_mortal (pTHX)	906	free_coro_mortal (pTHX)
873	{	907	{
874	if (expect_true (coro_mortal))	908	if (expect_true (coro_mortal))
875	{	909	{
876	SvREFCNT_dec (coro_mortal);	910	SvREFCNT_dec (coro_mortal);
…		…
910	: cx->blk_gimme == G_SCALAR ? bot + 1	944	: cx->blk_gimme == G_SCALAR ? bot + 1
911	: bot;	945	: bot;
912		946
913	av_extend (av, top - bot);	947	av_extend (av, top - bot);
914	while (bot < top)	948	while (bot < top)
915	av_push (av, SvREFCNT_inc (*bot++));	949	av_push (av, SvREFCNT_inc_NN (*bot++));
916		950
917	PL_runops = RUNOPS_DEFAULT;	951	PL_runops = RUNOPS_DEFAULT;
918	ENTER;	952	ENTER;
919	SAVETMPS;	953	SAVETMPS;
920	EXTEND (SP, 3);	954	EXTEND (SP, 3);
…		…
1000		1034
1001	TAINT_NOT;	1035	TAINT_NOT;
1002	return 0;	1036	return 0;
1003	}	1037	}
1004		1038
		1039	static void
		1040	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
		1041	{
		1042	ta->prev = (struct coro *)cctx;
		1043	ta->next = 0;
		1044	}
		1045
1005	/* inject a fake call to Coro::State::_cctx_init into the execution */	1046	/* inject a fake call to Coro::State::_cctx_init into the execution */
1006	/* _cctx_init should be careful, as it could be called at almost any time */	1047	/* _cctx_init should be careful, as it could be called at almost any time */
1007	/* during execution of a perl program */	1048	/* during execution of a perl program */
		1049	/* also initialises PL_top_env */
1008	static void NOINLINE	1050	static void NOINLINE
1009	cctx_prepare (pTHX_ coro_cctx *cctx)	1051	cctx_prepare (pTHX_ coro_cctx *cctx)
1010	{	1052	{
1011	dSP;	1053	dSP;
1012	LOGOP myop;	1054	UNOP myop;
1013		1055
1014	PL_top_env = &PL_start_env;	1056	PL_top_env = &PL_start_env;
1015		1057
1016	if (cctx->flags & CC_TRACE)	1058	if (cctx->flags & CC_TRACE)
1017	PL_runops = runops_trace;	1059	PL_runops = runops_trace;
1018		1060
1019	Zero (&myop, 1, LOGOP);	1061	Zero (&myop, 1, UNOP);
1020	myop.op_next = PL_op;	1062	myop.op_next = PL_op;
1021	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1063	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1022		1064
1023	PUSHMARK (SP);	1065	PUSHMARK (SP);
1024	EXTEND (SP, 2);	1066	EXTEND (SP, 2);
1025	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1067	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1026	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1068	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1027	PUTBACK;	1069	PUTBACK;
1028	PL_op = (OP *)&myop;	1070	PL_op = (OP *)&myop;
1029	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1071	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1030	SPAGAIN;	1072	SPAGAIN;
1031	}	1073	}
1032		1074
		1075	/* the tail of transfer: execute stuff we can only do after a transfer */
		1076	INLINE void
		1077	transfer_tail (pTHX)
		1078	{
		1079	struct coro *next = (struct coro *)transfer_next;
		1080	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
		1081	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
		1082
		1083	free_coro_mortal (aTHX);
		1084
		1085	if (expect_false (next->throw))
		1086	{
		1087	SV *exception = sv_2mortal (next->throw);
		1088
		1089	next->throw = 0;
		1090	sv_setsv (ERRSV, exception);
		1091	croak (0);
		1092	}
		1093	}
		1094
1033	/*	1095	/*
1034	* this is a _very_ stripped down perl interpreter ;)	1096	* this is a _very_ stripped down perl interpreter ;)
1035	*/	1097	*/
1036	static void	1098	static void
1037	cctx_run (void *arg)	1099	cctx_run (void *arg)
1038	{	1100	{
		1101	#ifdef USE_ITHREADS
		1102	# if CORO_PTHREAD
		1103	PERL_SET_CONTEXT (coro_thx);
		1104	# endif
		1105	#endif
		1106	{
1039	dTHX;	1107	dTHX;
1040		1108
1041	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1109	/* normally we would need to skip the entersub here */
1042	UNLOCK;	1110	/* not doing so will re-execute it, which is exactly what we want */
1043
1044	/* we now skip the entersub that lead to transfer() */
1045	PL_op = PL_op->op_next;	1111	/* PL_nop = PL_nop->op_next */
1046		1112
1047	/* inject a fake subroutine call to cctx_init */	1113	/* inject a fake subroutine call to cctx_init */
1048	cctx_prepare (aTHX_ (coro_cctx *)arg);	1114	cctx_prepare (aTHX_ (coro_cctx *)arg);
1049		1115
		1116	/* cctx_run is the alternative tail of transfer() */
		1117	/* TODO: throwing an exception here might be deadly, VERIFY */
		1118	transfer_tail (aTHX);
		1119
1050	/* somebody or something will hit me for both perl_run and PL_restartop */	1120	/* somebody or something will hit me for both perl_run and PL_restartop */
1051	PL_restartop = PL_op;	1121	PL_restartop = PL_op;
1052	perl_run (PL_curinterp);	1122	perl_run (PL_curinterp);
1053		1123
1054	/*	1124	/*
1055	* If perl-run returns we assume exit() was being called or the coro	1125	* If perl-run returns we assume exit() was being called or the coro
1056	* fell off the end, which seems to be the only valid (non-bug)	1126	* fell off the end, which seems to be the only valid (non-bug)
1057	* reason for perl_run to return. We try to exit by jumping to the	1127	* reason for perl_run to return. We try to exit by jumping to the
1058	* bootstrap-time "top" top_env, as we cannot restore the "main"	1128	* bootstrap-time "top" top_env, as we cannot restore the "main"
1059	* coroutine as Coro has no such concept	1129	* coroutine as Coro has no such concept
1060	*/	1130	*/
1061	PL_top_env = main_top_env;	1131	PL_top_env = main_top_env;
1062	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */	1132	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1133	}
1063	}	1134	}
1064		1135
1065	static coro_cctx *	1136	static coro_cctx *
1066	cctx_new ()	1137	cctx_new ()
1067	{	1138	{
1068	coro_cctx *cctx;	1139	coro_cctx *cctx;
		1140
		1141	++cctx_count;
		1142	New (0, cctx, 1, coro_cctx);
		1143
		1144	cctx->gen = cctx_gen;
		1145	cctx->flags = 0;
		1146	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1147
		1148	return cctx;
		1149	}
		1150
		1151	/* create a new cctx only suitable as source */
		1152	static coro_cctx *
		1153	cctx_new_empty ()
		1154	{
		1155	coro_cctx *cctx = cctx_new ();
		1156
		1157	cctx->sptr = 0;
		1158	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1159
		1160	return cctx;
		1161	}
		1162
		1163	/* create a new cctx suitable as destination/running a perl interpreter */
		1164	static coro_cctx *
		1165	cctx_new_run ()
		1166	{
		1167	coro_cctx *cctx = cctx_new ();
1069	void *stack_start;	1168	void *stack_start;
1070	size_t stack_size;	1169	size_t stack_size;
1071		1170
1072	++cctx_count;
1073
1074	Newz (0, cctx, 1, coro_cctx);
1075
1076	#if HAVE_MMAP	1171	#if HAVE_MMAP
1077	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1172	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1078	/* mmap supposedly does allocate-on-write for us */	1173	/* mmap supposedly does allocate-on-write for us */
1079	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1174	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1080		1175
1081	if (cctx->sptr != (void *)-1)	1176	if (cctx->sptr != (void *)-1)
1082	{	1177	{
1083	# if CORO_STACKGUARD	1178	#if CORO_STACKGUARD
1084	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1179	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1085	# endif	1180	#endif
1086	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1181	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1087	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1182	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1088	cctx->flags |= CC_MAPPED;	1183	cctx->flags |= CC_MAPPED;
1089	}	1184	}
1090	else	1185	else
1091	#endif	1186	#endif
1092	{	1187	{
1093	cctx->ssize = coro_stacksize * (long)sizeof (long);	1188	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1094	New (0, cctx->sptr, coro_stacksize, long);	1189	New (0, cctx->sptr, cctx_stacksize, long);
1095		1190
1096	if (!cctx->sptr)	1191	if (!cctx->sptr)
1097	{	1192	{
1098	perror ("FATAL: unable to allocate stack for coroutine");	1193	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1099	_exit (EXIT_FAILURE);	1194	_exit (EXIT_FAILURE);
1100	}	1195	}
1101		1196
1102	stack_start = cctx->sptr;	1197	stack_start = cctx->sptr;
1103	stack_size = cctx->ssize;	1198	stack_size = cctx->ssize;
1104	}	1199	}
1105		1200
1106	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1201	#if CORO_USE_VALGRIND
		1202	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
		1203	#endif
		1204
1107	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1205	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1108		1206
1109	return cctx;	1207	return cctx;
1110	}	1208	}
1111		1209
…		…
1114	{	1212	{
1115	if (!cctx)	1213	if (!cctx)
1116	return;	1214	return;
1117		1215
1118	--cctx_count;	1216	--cctx_count;
		1217	coro_destroy (&cctx->cctx);
1119		1218
		1219	/* coro_transfer creates new, empty cctx's */
		1220	if (cctx->sptr)
		1221	{
1120	#if CORO_USE_VALGRIND	1222	#if CORO_USE_VALGRIND
1121	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1223	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1122	#endif	1224	#endif
1123		1225
1124	#if HAVE_MMAP	1226	#if HAVE_MMAP
1125	if (cctx->flags & CC_MAPPED)	1227	if (cctx->flags & CC_MAPPED)
1126	munmap (cctx->sptr, cctx->ssize);	1228	munmap (cctx->sptr, cctx->ssize);
1127	else	1229	else
1128	#endif	1230	#endif
1129	Safefree (cctx->sptr);	1231	Safefree (cctx->sptr);
		1232	}
1130		1233
1131	Safefree (cctx);	1234	Safefree (cctx);
1132	}	1235	}
1133		1236
1134	/* wether this cctx should be destructed */	1237	/* wether this cctx should be destructed */
1135	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))	1238	#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1136		1239
1137	static coro_cctx *	1240	static coro_cctx *
1138	cctx_get (pTHX)	1241	cctx_get (pTHX)
1139	{	1242	{
1140	while (expect_true (cctx_first))	1243	while (expect_true (cctx_first))
…		…
1147	return cctx;	1250	return cctx;
1148		1251
1149	cctx_destroy (cctx);	1252	cctx_destroy (cctx);
1150	}	1253	}
1151		1254
1152	return cctx_new ();	1255	return cctx_new_run ();
1153	}	1256	}
1154		1257
1155	static void	1258	static void
1156	cctx_put (coro_cctx *cctx)	1259	cctx_put (coro_cctx *cctx)
1157	{	1260	{
		1261	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
		1262
1158	/* free another cctx if overlimit */	1263	/* free another cctx if overlimit */
1159	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1264	if (expect_false (cctx_idle >= cctx_max_idle))
1160	{	1265	{
1161	coro_cctx *first = cctx_first;	1266	coro_cctx *first = cctx_first;
1162	cctx_first = first->next;	1267	cctx_first = first->next;
1163	--cctx_idle;	1268	--cctx_idle;
1164		1269
…		…
1176	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1281	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1177	{	1282	{
1178	if (expect_true (prev != next))	1283	if (expect_true (prev != next))
1179	{	1284	{
1180	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1285	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1181	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1286	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1182		1287
1183	if (expect_false (next->flags & CF_RUNNING))	1288	if (expect_false (next->flags & CF_RUNNING))
1184	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1289	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1185		1290
1186	if (expect_false (next->flags & CF_DESTROYED))	1291	if (expect_false (next->flags & CF_DESTROYED))
1187	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1292	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1188		1293
1189	#if !PERL_VERSION_ATLEAST (5,10,0)	1294	#if !PERL_VERSION_ATLEAST (5,10,0)
1190	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1295	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1191	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1296	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1192	#endif	1297	#endif
1193	}	1298	}
1194	}	1299	}
1195		1300
1196	/* always use the TRANSFER macro */	1301	/* always use the TRANSFER macro */
1197	static void NOINLINE	1302	static void NOINLINE
1198	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1303	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1199	{	1304	{
1200	dSTACKLEVEL;	1305	dSTACKLEVEL;
1201	static volatile int has_throw;
1202		1306
1203	/* sometimes transfer is only called to set idle_sp */	1307	/* sometimes transfer is only called to set idle_sp */
1204	if (expect_false (!next))	1308	if (expect_false (!next))
1205	{	1309	{
1206	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1310	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1207	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1311	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1208	}	1312	}
1209	else if (expect_true (prev != next))	1313	else if (expect_true (prev != next))
1210	{	1314	{
1211	coro_cctx *prev__cctx;	1315	coro_cctx *prev__cctx;
1212		1316
1213	if (expect_false (prev->flags & CF_NEW))	1317	if (expect_false (prev->flags & CF_NEW))
1214	{	1318	{
1215	/* create a new empty context */	1319	/* create a new empty/source context */
1216	Newz (0, prev->cctx, 1, coro_cctx);	1320	prev->cctx = cctx_new_empty ();
1217	prev->flags &= ~CF_NEW;	1321	prev->flags &= ~CF_NEW;
1218	prev->flags |= CF_RUNNING;	1322	prev->flags |= CF_RUNNING;
1219	}	1323	}
1220		1324
1221	prev->flags &= ~CF_RUNNING;	1325	prev->flags &= ~CF_RUNNING;
1222	next->flags |= CF_RUNNING;	1326	next->flags |= CF_RUNNING;
1223
1224	LOCK;
1225		1327
1226	/* first get rid of the old state */	1328	/* first get rid of the old state */
1227	save_perl (aTHX_ prev);	1329	save_perl (aTHX_ prev);
1228		1330
1229	if (expect_false (next->flags & CF_NEW))	1331	if (expect_false (next->flags & CF_NEW))
…		…
1236	else	1338	else
1237	load_perl (aTHX_ next);	1339	load_perl (aTHX_ next);
1238		1340
1239	prev__cctx = prev->cctx;	1341	prev__cctx = prev->cctx;
1240		1342
1241	/* possibly "free" the cctx */	1343	/* possibly untie and reuse the cctx */
1242	if (expect_true (	1344	if (expect_true (
1243	prev__cctx->idle_sp == STACKLEVEL	1345	prev__cctx->idle_sp == (void *)stacklevel
1244	&& !(prev__cctx->flags & CC_TRACE)	1346	&& !(prev__cctx->flags & CC_TRACE)
1245	&& !force_cctx	1347	&& !force_cctx
1246	))	1348	))
1247	{	1349	{
1248	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1350	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1249	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1351	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1250		1352
1251	prev->cctx = 0;	1353	prev->cctx = 0;
1252		1354
1253	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1355	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1254	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1356	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1262	++next->usecount;	1364	++next->usecount;
1263		1365
1264	if (expect_true (!next->cctx))	1366	if (expect_true (!next->cctx))
1265	next->cctx = cctx_get (aTHX);	1367	next->cctx = cctx_get (aTHX);
1266		1368
1267	has_throw = !!next->throw;	1369	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1370	transfer_next = next;
1268		1371
1269	if (expect_false (prev__cctx != next->cctx))	1372	if (expect_false (prev__cctx != next->cctx))
1270	{	1373	{
1271	prev__cctx->top_env = PL_top_env;	1374	prev__cctx->top_env = PL_top_env;
1272	PL_top_env = next->cctx->top_env;	1375	PL_top_env = next->cctx->top_env;
1273	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1376	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1274	}	1377	}
1275		1378
1276	free_coro_mortal (aTHX);	1379	transfer_tail (aTHX);
1277	UNLOCK;
1278
1279	if (expect_false (has_throw))
1280	{
1281	struct coro *coro = SvSTATE (coro_current);
1282
1283	if (coro->throw)
1284	{
1285	SV *exception = coro->throw;
1286	coro->throw = 0;
1287	sv_setsv (ERRSV, exception);
1288	croak (0);
1289	}
1290	}
1291	}	1380	}
1292	}	1381	}
1293
1294	struct transfer_args
1295	{
1296	struct coro *prev, *next;
1297	};
1298		1382
1299	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1383	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1300	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1384	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1301		1385
1302	/** high level stuff ********************************************************/	1386	/** high level stuff ********************************************************/
…		…
1304	static int	1388	static int
1305	coro_state_destroy (pTHX_ struct coro *coro)	1389	coro_state_destroy (pTHX_ struct coro *coro)
1306	{	1390	{
1307	if (coro->flags & CF_DESTROYED)	1391	if (coro->flags & CF_DESTROYED)
1308	return 0;	1392	return 0;
		1393
		1394	if (coro->on_destroy)
		1395	coro->on_destroy (aTHX_ coro);
1309		1396
1310	coro->flags |= CF_DESTROYED;	1397	coro->flags |= CF_DESTROYED;
1311		1398
1312	if (coro->flags & CF_READY)	1399	if (coro->flags & CF_READY)
1313	{	1400	{
1314	/* reduce nready, as destroying a ready coro effectively unreadies it */	1401	/* reduce nready, as destroying a ready coro effectively unreadies it */
1315	/* alternative: look through all ready queues and remove the coro */	1402	/* alternative: look through all ready queues and remove the coro */
1316	LOCK;
1317	--coro_nready;	1403	--coro_nready;
1318	UNLOCK;
1319	}	1404	}
1320	else	1405	else
1321	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1406	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1322		1407
1323	if (coro->mainstack && coro->mainstack != main_mainstack)	1408	if (coro->mainstack && coro->mainstack != main_mainstack)
1324	{	1409	{
1325	struct coro temp;	1410	struct coro temp;
1326		1411
1327	if (coro->flags & CF_RUNNING)	1412	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1328	croak ("FATAL: tried to destroy currently running coroutine");
1329		1413
1330	save_perl (aTHX_ &temp);	1414	save_perl (aTHX_ &temp);
1331	load_perl (aTHX_ coro);	1415	load_perl (aTHX_ coro);
1332		1416
1333	coro_destroy (aTHX_ coro);	1417	coro_destruct (aTHX_ coro);
1334		1418
1335	load_perl (aTHX_ &temp);	1419	load_perl (aTHX_ &temp);
1336		1420
1337	coro->slot = 0;	1421	coro->slot = 0;
1338	}	1422	}
…		…
1384	# define MGf_DUP 0	1468	# define MGf_DUP 0
1385	#endif	1469	#endif
1386	};	1470	};
1387		1471
1388	static void	1472	static void
1389	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1473	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1390	{	1474	{
1391	ta->prev = SvSTATE (prev_sv);	1475	ta->prev = SvSTATE (prev_sv);
1392	ta->next = SvSTATE (next_sv);	1476	ta->next = SvSTATE (next_sv);
1393	TRANSFER_CHECK (*ta);	1477	TRANSFER_CHECK (*ta);
1394	}	1478	}
1395		1479
1396	static void	1480	static void
1397	api_transfer (SV *prev_sv, SV *next_sv)	1481	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1398	{	1482	{
1399	dTHX;
1400	struct transfer_args ta;	1483	struct coro_transfer_args ta;
1401		1484
1402	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1485	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1403	TRANSFER (ta, 1);	1486	TRANSFER (ta, 1);
1404	}	1487	}
1405		1488
…		…
1422		1505
1423	return 0;	1506	return 0;
1424	}	1507	}
1425		1508
1426	static int	1509	static int
1427	api_ready (SV *coro_sv)	1510	api_ready (pTHX_ SV *coro_sv)
1428	{	1511	{
1429	dTHX;
1430	struct coro *coro;	1512	struct coro *coro;
1431	SV *sv_hook;	1513	SV *sv_hook;
1432	void (*xs_hook)(void);	1514	void (*xs_hook)(void);
1433		1515
1434	if (SvROK (coro_sv))	1516	if (SvROK (coro_sv))
…		…
1439	if (coro->flags & CF_READY)	1521	if (coro->flags & CF_READY)
1440	return 0;	1522	return 0;
1441		1523
1442	coro->flags |= CF_READY;	1524	coro->flags |= CF_READY;
1443		1525
1444	LOCK;
1445
1446	sv_hook = coro_nready ? 0 : coro_readyhook;	1526	sv_hook = coro_nready ? 0 : coro_readyhook;
1447	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1527	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1448		1528
1449	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));	1529	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1450	++coro_nready;	1530	++coro_nready;
1451		1531
1452	UNLOCK;
1453
1454	if (sv_hook)	1532	if (sv_hook)
1455	{	1533	{
1456	dSP;	1534	dSP;
1457		1535
1458	ENTER;	1536	ENTER;
…		…
1472		1550
1473	return 1;	1551	return 1;
1474	}	1552	}
1475		1553
1476	static int	1554	static int
1477	api_is_ready (SV *coro_sv)	1555	api_is_ready (pTHX_ SV *coro_sv)
1478	{	1556	{
1479	dTHX;
1480	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1557	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1481	}	1558	}
1482		1559
1483	static void	1560	INLINE void
1484	prepare_schedule (pTHX_ struct transfer_args *ta)	1561	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1485	{	1562	{
1486	SV *prev_sv, *next_sv;	1563	SV *prev_sv, *next_sv;
1487		1564
1488	for (;;)	1565	for (;;)
1489	{	1566	{
1490	LOCK;
1491	next_sv = coro_deq (aTHX);	1567	next_sv = coro_deq (aTHX);
1492		1568
1493	/* nothing to schedule: call the idle handler */	1569	/* nothing to schedule: call the idle handler */
1494	if (expect_false (!next_sv))	1570	if (expect_false (!next_sv))
1495	{	1571	{
1496	dSP;	1572	dSP;
1497	UNLOCK;
1498		1573
1499	ENTER;	1574	ENTER;
1500	SAVETMPS;	1575	SAVETMPS;
1501		1576
1502	PUSHMARK (SP);	1577	PUSHMARK (SP);
…		…
1512	ta->next = SvSTATE (next_sv);	1587	ta->next = SvSTATE (next_sv);
1513		1588
1514	/* cannot transfer to destroyed coros, skip and look for next */	1589	/* cannot transfer to destroyed coros, skip and look for next */
1515	if (expect_false (ta->next->flags & CF_DESTROYED))	1590	if (expect_false (ta->next->flags & CF_DESTROYED))
1516	{	1591	{
1517	UNLOCK;
1518	SvREFCNT_dec (next_sv);	1592	SvREFCNT_dec (next_sv);
1519	/* coro_nready is already taken care of by destroy */	1593	/* coro_nready has already been taken care of by destroy */
1520	continue;	1594	continue;
1521	}	1595	}
1522		1596
1523	--coro_nready;	1597	--coro_nready;
1524	UNLOCK;
1525	break;	1598	break;
1526	}	1599	}
1527		1600
1528	/* free this only after the transfer */	1601	/* free this only after the transfer */
1529	prev_sv = SvRV (coro_current);	1602	prev_sv = SvRV (coro_current);
1530	ta->prev = SvSTATE (prev_sv);	1603	ta->prev = SvSTATE (prev_sv);
1531	TRANSFER_CHECK (*ta);	1604	TRANSFER_CHECK (*ta);
1532	assert (ta->next->flags & CF_READY);	1605	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1533	ta->next->flags &= ~CF_READY;	1606	ta->next->flags &= ~CF_READY;
1534	SvRV_set (coro_current, next_sv);	1607	SvRV_set (coro_current, next_sv);
1535		1608
1536	LOCK;
1537	free_coro_mortal (aTHX);	1609	free_coro_mortal (aTHX);
1538	coro_mortal = prev_sv;	1610	coro_mortal = prev_sv;
1539	UNLOCK;
1540	}	1611	}
1541		1612
1542	static void	1613	INLINE void
1543	prepare_cede (pTHX_ struct transfer_args *ta)	1614	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1544	{	1615	{
1545	api_ready (coro_current);	1616	api_ready (aTHX_ coro_current);
1546	prepare_schedule (aTHX_ ta);	1617	prepare_schedule (aTHX_ ta);
1547	}	1618	}
1548		1619
		1620	INLINE void
		1621	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1622	{
		1623	SV *prev = SvRV (coro_current);
		1624
		1625	if (coro_nready)
		1626	{
		1627	prepare_schedule (aTHX_ ta);
		1628	api_ready (aTHX_ prev);
		1629	}
		1630	else
		1631	prepare_nop (aTHX_ ta);
		1632	}
		1633
		1634	static void
		1635	api_schedule (pTHX)
		1636	{
		1637	struct coro_transfer_args ta;
		1638
		1639	prepare_schedule (aTHX_ &ta);
		1640	TRANSFER (ta, 1);
		1641	}
		1642
1549	static int	1643	static int
1550	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1644	api_cede (pTHX)
1551	{	1645	{
1552	if (coro_nready)	1646	struct coro_transfer_args ta;
1553	{	1647
1554	SV *prev = SvRV (coro_current);
1555	prepare_schedule (aTHX_ ta);	1648	prepare_cede (aTHX_ &ta);
1556	api_ready (prev);	1649
		1650	if (expect_true (ta.prev != ta.next))
		1651	{
		1652	TRANSFER (ta, 1);
1557	return 1;	1653	return 1;
1558	}	1654	}
1559	else	1655	else
1560	return 0;	1656	return 0;
1561	}	1657	}
1562		1658
1563	static void
1564	api_schedule (void)
1565	{
1566	dTHX;
1567	struct transfer_args ta;
1568
1569	prepare_schedule (aTHX_ &ta);
1570	TRANSFER (ta, 1);
1571	}
1572
1573	static int	1659	static int
1574	api_cede (void)	1660	api_cede_notself (pTHX)
1575	{	1661	{
1576	dTHX;	1662	if (coro_nready)
		1663	{
1577	struct transfer_args ta;	1664	struct coro_transfer_args ta;
1578		1665
1579	prepare_cede (aTHX_ &ta);	1666	prepare_cede_notself (aTHX_ &ta);
1580
1581	if (expect_true (ta.prev != ta.next))
1582	{
1583	TRANSFER (ta, 1);	1667	TRANSFER (ta, 1);
1584	return 1;	1668	return 1;
1585	}	1669	}
1586	else	1670	else
1587	return 0;	1671	return 0;
1588	}	1672	}
1589		1673
1590	static int	1674	static void
1591	api_cede_notself (void)
1592	{
1593	dTHX;
1594	struct transfer_args ta;
1595
1596	if (prepare_cede_notself (aTHX_ &ta))
1597	{
1598	TRANSFER (ta, 1);
1599	return 1;
1600	}
1601	else
1602	return 0;
1603	}
1604
1605	static void
1606	api_trace (SV *coro_sv, int flags)	1675	api_trace (pTHX_ SV *coro_sv, int flags)
1607	{	1676	{
1608	dTHX;
1609	struct coro *coro = SvSTATE (coro_sv);	1677	struct coro *coro = SvSTATE (coro_sv);
1610		1678
1611	if (flags & CC_TRACE)	1679	if (flags & CC_TRACE)
1612	{	1680	{
1613	if (!coro->cctx)	1681	if (!coro->cctx)
1614	coro->cctx = cctx_new ();	1682	coro->cctx = cctx_new_run ();
1615	else if (!(coro->cctx->flags & CC_TRACE))	1683	else if (!(coro->cctx->flags & CC_TRACE))
1616	croak ("cannot enable tracing on coroutine with custom stack");	1684	croak ("cannot enable tracing on coroutine with custom stack,");
1617		1685
1618	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1686	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1619	}	1687	}
1620	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1688	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1621	{	1689	{
…		…
1626	else	1694	else
1627	coro->slot->runops = RUNOPS_DEFAULT;	1695	coro->slot->runops = RUNOPS_DEFAULT;
1628	}	1696	}
1629	}	1697	}
1630		1698
		1699	/*****************************************************************************/
		1700	/* PerlIO::cede */
		1701
		1702	typedef struct
		1703	{
		1704	PerlIOBuf base;
		1705	NV next, every;
		1706	} PerlIOCede;
		1707
		1708	static IV
		1709	PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
		1710	{
		1711	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1712
		1713	self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
		1714	self->next = nvtime () + self->every;
		1715
		1716	return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
		1717	}
		1718
		1719	static SV *
		1720	PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
		1721	{
		1722	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1723
		1724	return newSVnv (self->every);
		1725	}
		1726
		1727	static IV
		1728	PerlIOCede_flush (pTHX_ PerlIO *f)
		1729	{
		1730	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1731	double now = nvtime ();
		1732
		1733	if (now >= self->next)
		1734	{
		1735	api_cede (aTHX);
		1736	self->next = now + self->every;
		1737	}
		1738
		1739	return PerlIOBuf_flush (aTHX_ f);
		1740	}
		1741
		1742	static PerlIO_funcs PerlIO_cede =
		1743	{
		1744	sizeof(PerlIO_funcs),
		1745	"cede",
		1746	sizeof(PerlIOCede),
		1747	PERLIO_K_DESTRUCT | PERLIO_K_RAW,
		1748	PerlIOCede_pushed,
		1749	PerlIOBuf_popped,
		1750	PerlIOBuf_open,
		1751	PerlIOBase_binmode,
		1752	PerlIOCede_getarg,
		1753	PerlIOBase_fileno,
		1754	PerlIOBuf_dup,
		1755	PerlIOBuf_read,
		1756	PerlIOBuf_unread,
		1757	PerlIOBuf_write,
		1758	PerlIOBuf_seek,
		1759	PerlIOBuf_tell,
		1760	PerlIOBuf_close,
		1761	PerlIOCede_flush,
		1762	PerlIOBuf_fill,
		1763	PerlIOBase_eof,
		1764	PerlIOBase_error,
		1765	PerlIOBase_clearerr,
		1766	PerlIOBase_setlinebuf,
		1767	PerlIOBuf_get_base,
		1768	PerlIOBuf_bufsiz,
		1769	PerlIOBuf_get_ptr,
		1770	PerlIOBuf_get_cnt,
		1771	PerlIOBuf_set_ptrcnt,
		1772	};
		1773
		1774	/*****************************************************************************/
		1775
		1776	static const CV *slf_cv; /* for quick consistency check */
		1777
		1778	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1779	static SV *slf_arg0;
		1780	static SV *slf_arg1;
		1781	static SV *slf_arg2;
		1782
		1783	/* this restores the stack in the case we patched the entersub, to */
		1784	/* recreate the stack frame as perl will on following calls */
		1785	/* since entersub cleared the stack */
		1786	static OP *
		1787	pp_restore (pTHX)
		1788	{
		1789	dSP;
		1790
		1791	PUSHMARK (SP);
		1792
		1793	EXTEND (SP, 3);
		1794	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1795	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1796	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1797	PUSHs ((SV *)CvGV (slf_cv));
		1798
		1799	RETURNOP (slf_restore.op_first);
		1800	}
		1801
		1802	static void
		1803	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1804	{
		1805	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1806	}
		1807
		1808	static void
		1809	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1810	{
		1811	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1812
		1813	frame->prepare = slf_prepare_set_stacklevel;
		1814	frame->check = slf_check_nop;
		1815	frame->data = (void *)SvIV (arg [0]);
		1816	}
		1817
		1818	static void
		1819	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1820	{
		1821	SV **arg = (SV **)slf_frame.data;
		1822
		1823	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1824	}
		1825
		1826	static void
		1827	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1828	{
		1829	if (items != 2)
		1830	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1831
		1832	frame->prepare = slf_prepare_transfer;
		1833	frame->check = slf_check_nop;
		1834	frame->data = (void *)arg; /* let's hope it will stay valid */
		1835	}
		1836
		1837	static void
		1838	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1839	{
		1840	frame->prepare = prepare_schedule;
		1841	frame->check = slf_check_nop;
		1842	}
		1843
		1844	static void
		1845	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1846	{
		1847	frame->prepare = prepare_cede;
		1848	frame->check = slf_check_nop;
		1849	}
		1850
		1851	static void
		1852	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1853	{
		1854	frame->prepare = prepare_cede_notself;
		1855	frame->check = slf_check_nop;
		1856	}
		1857
		1858	/* we hijack an hopefully unused CV flag for our purposes */
		1859	#define CVf_SLF 0x4000
		1860
		1861	/*
		1862	* these not obviously related functions are all rolled into one
		1863	* function to increase chances that they all will call transfer with the same
		1864	* stack offset
		1865	* SLF stands for "schedule-like-function".
		1866	*/
		1867	static OP *
		1868	pp_slf (pTHX)
		1869	{
		1870	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1871
		1872	/* set up the slf frame, unless it has already been set-up */
		1873	/* the latter happens when a new coro has been started */
		1874	/* or when a new cctx was attached to an existing coroutine */
		1875	if (expect_true (!slf_frame.prepare))
		1876	{
		1877	/* first iteration */
		1878	dSP;
		1879	SV **arg = PL_stack_base + TOPMARK + 1;
		1880	int items = SP - arg; /* args without function object */
		1881	SV *gv = *sp;
		1882
		1883	/* do a quick consistency check on the "function" object, and if it isn't */
		1884	/* for us, divert to the real entersub */
		1885	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1886	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1887
		1888	/* pop args */
		1889	SP = PL_stack_base + POPMARK;
		1890
		1891	if (!(PL_op->op_flags & OPf_STACKED))
		1892	{
		1893	/* ampersand-form of call, use @_ instead of stack */
		1894	AV *av = GvAV (PL_defgv);
		1895	arg = AvARRAY (av);
		1896	items = AvFILLp (av) + 1;
		1897	}
		1898
		1899	PUTBACK;
		1900
		1901	/* now call the init function, which needs to set up slf_frame */
		1902	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1903	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1904	}
		1905
		1906	/* now that we have a slf_frame, interpret it! */
		1907	/* we use a callback system not to make the code needlessly */
		1908	/* complicated, but so we can run multiple perl coros from one cctx */
		1909
		1910	do
		1911	{
		1912	struct coro_transfer_args ta;
		1913
		1914	slf_frame.prepare (aTHX_ &ta);
		1915	TRANSFER (ta, 0);
		1916
		1917	checkmark = PL_stack_sp - PL_stack_base;
		1918	}
		1919	while (slf_frame.check (aTHX_ &slf_frame));
		1920
		1921	{
		1922	dSP;
		1923	SV **bot = PL_stack_base + checkmark;
		1924	int gimme = GIMME_V;
		1925
		1926	slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
		1927
		1928	/* make sure we put something on the stack in scalar context */
		1929	if (gimme == G_SCALAR)
		1930	{
		1931	if (sp == bot)
		1932	XPUSHs (&PL_sv_undef);
		1933
		1934	SP = bot + 1;
		1935	}
		1936
		1937	PUTBACK;
		1938	}
		1939
		1940	return NORMAL;
		1941	}
		1942
		1943	static void
		1944	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
		1945	{
		1946	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1947
		1948	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1949	&& PL_op->op_ppaddr != pp_slf)
		1950	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1951
		1952	if (items > 3)
		1953	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
		1954
		1955	CvFLAGS (cv) |= CVf_SLF;
		1956	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1957	slf_cv = cv;
		1958
		1959	/* we patch the op, and then re-run the whole call */
		1960	/* we have to put the same argument on the stack for this to work */
		1961	/* and this will be done by pp_restore */
		1962	slf_restore.op_next = (OP *)&slf_restore;
		1963	slf_restore.op_type = OP_CUSTOM;
		1964	slf_restore.op_ppaddr = pp_restore;
		1965	slf_restore.op_first = PL_op;
		1966
		1967	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		1968	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		1969	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
		1970
		1971	PL_op->op_ppaddr = pp_slf;
		1972
		1973	PL_op = (OP *)&slf_restore;
		1974	}
		1975
		1976	/*****************************************************************************/
		1977
		1978	static void
		1979	coro_semaphore_adjust (AV *av, int adjust)
		1980	{
		1981	SV *count_sv = AvARRAY (av)[0];
		1982	IV count = SvIVX (count_sv);
		1983
		1984	count += adjust;
		1985	SvIVX (count_sv) = count;
		1986
		1987	/* now wake up as many waiters as possible */
		1988	while (count > 0 && AvFILLp (av) >= count)
		1989	{
		1990	SV *cb;
		1991
		1992	/* swap first two elements so we can shift a waiter */
		1993	AvARRAY (av)[0] = AvARRAY (av)[1];
		1994	AvARRAY (av)[1] = count_sv;
		1995	cb = av_shift (av);
		1996
		1997	if (SvOBJECT (cb))
		1998	api_ready (aTHX_ cb);
		1999	else
		2000	croak ("callbacks not yet supported");
		2001
		2002	SvREFCNT_dec (cb);
		2003
		2004	--count;
		2005	}
		2006	}
		2007
		2008	static void
		2009	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2010	{
		2011	/* call $sem->adjust (0) to possibly wake up some waiters */
		2012	coro_semaphore_adjust ((AV *)coro->slf_frame.data, 0);
		2013	}
		2014
1631	static int	2015	static int
1632	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	2016	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
1633	{	2017	{
1634	AV *padlist;	2018	AV *av = (AV *)frame->data;
1635	AV *av = (AV *)mg->mg_obj;	2019	SV *count_sv = AvARRAY (av)[0];
1636		2020
1637	abort ();	2021	if (SvIVX (count_sv) > 0)
1638		2022	{
		2023	SvSTATE (coro_current)->on_destroy = 0;
		2024	SvIVX (count_sv) = SvIVX (count_sv) - 1;
1639	return 0;	2025	return 0;
1640	}	2026	}
		2027	else
		2028	{
		2029	int i;
		2030	/* if we were woken up but can't down, we look through the whole */
		2031	/* waiters list and only add us if we aren't in there already */
		2032	/* this avoids some degenerate memory usage cases */
1641		2033
1642	static MGVTBL coro_gensub_vtbl = {	2034	for (i = 1; i <= AvFILLp (av); ++i)
1643	0, 0, 0, 0,	2035	if (AvARRAY (av)[i] == SvRV (coro_current))
1644	coro_gensub_free	2036	return 1;
1645	};	2037
		2038	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2039	return 1;
		2040	}
		2041	}
		2042
		2043	static void
		2044	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2045	{
		2046	AV *av = (AV *)SvRV (arg [0]);
		2047
		2048	if (SvIVX (AvARRAY (av)[0]) > 0)
		2049	{
		2050	frame->data = (void *)av;
		2051	frame->prepare = prepare_nop;
		2052	}
		2053	else
		2054	{
		2055	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2056
		2057	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2058	frame->prepare = prepare_schedule;
		2059
		2060	/* to avoid race conditions when a woken-up coro gets terminated */
		2061	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2062	SvSTATE (coro_current)->on_destroy = coro_semaphore_on_destroy;
		2063	}
		2064
		2065	frame->check = slf_check_semaphore_down;
		2066
		2067	}
		2068
		2069	/*****************************************************************************/
		2070
		2071	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2072
		2073	/* create a closure from XS, returns a code reference */
		2074	/* the arg can be accessed via GENSUB_ARG from the callback */
		2075	/* the callback must use dXSARGS/XSRETURN */
		2076	static SV *
		2077	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2078	{
		2079	CV *cv = (CV *)NEWSV (0, 0);
		2080
		2081	sv_upgrade ((SV *)cv, SVt_PVCV);
		2082
		2083	CvANON_on (cv);
		2084	CvISXSUB_on (cv);
		2085	CvXSUB (cv) = xsub;
		2086	GENSUB_ARG = arg;
		2087
		2088	return newRV_noinc ((SV *)cv);
		2089	}
		2090
		2091	/*****************************************************************************/
1646		2092
1647	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2093	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1648		2094
1649	PROTOTYPES: DISABLE	2095	PROTOTYPES: DISABLE
1650		2096
1651	BOOT:	2097	BOOT:
1652	{	2098	{
1653	#ifdef USE_ITHREADS	2099	#ifdef USE_ITHREADS
1654	MUTEX_INIT (&coro_mutex);	2100	MUTEX_INIT (&coro_lock);
		2101	# if CORO_PTHREAD
		2102	coro_thx = PERL_GET_CONTEXT;
		2103	# endif
1655	#endif	2104	#endif
1656	BOOT_PAGESIZE;	2105	BOOT_PAGESIZE;
1657		2106
1658	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	2107	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1659	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	2108	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
…		…
1677	main_top_env = PL_top_env;	2126	main_top_env = PL_top_env;
1678		2127
1679	while (main_top_env->je_prev)	2128	while (main_top_env->je_prev)
1680	main_top_env = main_top_env->je_prev;	2129	main_top_env = main_top_env->je_prev;
1681		2130
		2131	{
		2132	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2133
		2134	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2135	hv_store_ent (PL_custom_op_names, slf,
		2136	newSVpv ("coro_slf", 0), 0);
		2137
		2138	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2139	hv_store_ent (PL_custom_op_descs, slf,
		2140	newSVpv ("coro schedule like function", 0), 0);
		2141	}
		2142
1682	coroapi.ver = CORO_API_VERSION;	2143	coroapi.ver = CORO_API_VERSION;
1683	coroapi.rev = CORO_API_REVISION;	2144	coroapi.rev = CORO_API_REVISION;
		2145
1684	coroapi.transfer = api_transfer;	2146	coroapi.transfer = api_transfer;
		2147
		2148	coroapi.sv_state = SvSTATE_;
		2149	coroapi.execute_slf = api_execute_slf;
		2150	coroapi.prepare_nop = prepare_nop;
		2151	coroapi.prepare_schedule = prepare_schedule;
		2152	coroapi.prepare_cede = prepare_cede;
		2153	coroapi.prepare_cede_notself = prepare_cede_notself;
		2154
		2155	{
		2156	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
		2157
		2158	if (!svp) croak ("Time::HiRes is required");
		2159	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
		2160
		2161	nvtime = INT2PTR (double (*)(), SvIV (*svp));
		2162	}
1685		2163
1686	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	2164	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1687	}	2165	}
1688		2166
1689	SV *	2167	SV *
…		…
1713	av_push (coro->args, newSVsv (ST (i)));	2191	av_push (coro->args, newSVsv (ST (i)));
1714	}	2192	}
1715	OUTPUT:	2193	OUTPUT:
1716	RETVAL	2194	RETVAL
1717		2195
1718	# these not obviously related functions are all rolled into the same xs
1719	# function to increase chances that they all will call transfer with the same
1720	# stack offset
1721	void	2196	void
1722	_set_stacklevel (...)	2197	_set_stacklevel (...)
1723	ALIAS:	2198	CODE:
1724	Coro::State::transfer = 1	2199	api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1725	Coro::schedule = 2
1726	Coro::cede = 3
1727	Coro::cede_notself = 4
1728	CODE:
1729	{
1730	struct transfer_args ta;
1731		2200
1732	PUTBACK;	2201	void
1733	switch (ix)	2202	transfer (...)
1734	{	2203	PROTOTYPE: $$
1735	case 0:	2204	CODE:
1736	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	2205	api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1737	ta.next = 0;
1738	break;
1739
1740	case 1:
1741	if (items != 2)
1742	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1743
1744	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1745	break;
1746
1747	case 2:
1748	prepare_schedule (aTHX_ &ta);
1749	break;
1750
1751	case 3:
1752	prepare_cede (aTHX_ &ta);
1753	break;
1754
1755	case 4:
1756	if (!prepare_cede_notself (aTHX_ &ta))
1757	XSRETURN_EMPTY;
1758
1759	break;
1760	}
1761	SPAGAIN;
1762
1763	BARRIER;
1764	PUTBACK;
1765	TRANSFER (ta, 0);
1766	SPAGAIN; /* might be the sp of a different coroutine now */
1767	/* be extra careful not to ever do anything after TRANSFER */
1768	}
1769		2206
1770	bool	2207	bool
1771	_destroy (SV *coro_sv)	2208	_destroy (SV *coro_sv)
1772	CODE:	2209	CODE:
1773	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2210	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1780	CODE:	2217	CODE:
1781	_exit (code);	2218	_exit (code);
1782		2219
1783	int	2220	int
1784	cctx_stacksize (int new_stacksize = 0)	2221	cctx_stacksize (int new_stacksize = 0)
		2222	PROTOTYPE: ;$
1785	CODE:	2223	CODE:
1786	RETVAL = coro_stacksize;	2224	RETVAL = cctx_stacksize;
1787	if (new_stacksize)	2225	if (new_stacksize)
		2226	{
1788	coro_stacksize = new_stacksize;	2227	cctx_stacksize = new_stacksize;
		2228	++cctx_gen;
		2229	}
1789	OUTPUT:	2230	OUTPUT:
1790	RETVAL	2231	RETVAL
1791		2232
1792	int	2233	int
		2234	cctx_max_idle (int max_idle = 0)
		2235	PROTOTYPE: ;$
		2236	CODE:
		2237	RETVAL = cctx_max_idle;
		2238	if (max_idle > 1)
		2239	cctx_max_idle = max_idle;
		2240	OUTPUT:
		2241	RETVAL
		2242
		2243	int
1793	cctx_count ()	2244	cctx_count ()
		2245	PROTOTYPE:
1794	CODE:	2246	CODE:
1795	RETVAL = cctx_count;	2247	RETVAL = cctx_count;
1796	OUTPUT:	2248	OUTPUT:
1797	RETVAL	2249	RETVAL
1798		2250
1799	int	2251	int
1800	cctx_idle ()	2252	cctx_idle ()
		2253	PROTOTYPE:
1801	CODE:	2254	CODE:
1802	RETVAL = cctx_idle;	2255	RETVAL = cctx_idle;
1803	OUTPUT:	2256	OUTPUT:
1804	RETVAL	2257	RETVAL
1805		2258
1806	void	2259	void
1807	list ()	2260	list ()
		2261	PROTOTYPE:
1808	PPCODE:	2262	PPCODE:
1809	{	2263	{
1810	struct coro *coro;	2264	struct coro *coro;
1811	for (coro = coro_first; coro; coro = coro->next)	2265	for (coro = coro_first; coro; coro = coro->next)
1812	if (coro->hv)	2266	if (coro->hv)
…		…
1817	call (Coro::State coro, SV *coderef)	2271	call (Coro::State coro, SV *coderef)
1818	ALIAS:	2272	ALIAS:
1819	eval = 1	2273	eval = 1
1820	CODE:	2274	CODE:
1821	{	2275	{
1822	if (coro->mainstack)	2276	if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1823	{	2277	{
1824	struct coro temp;	2278	struct coro temp;
1825		2279
1826	if (!(coro->flags & CF_RUNNING))	2280	if (!(coro->flags & CF_RUNNING))
1827	{	2281	{
…		…
1871	RETVAL = boolSV (coro->flags & ix);	2325	RETVAL = boolSV (coro->flags & ix);
1872	OUTPUT:	2326	OUTPUT:
1873	RETVAL	2327	RETVAL
1874		2328
1875	void	2329	void
		2330	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2331	PROTOTYPE: $;$
		2332	CODE:
		2333	SvREFCNT_dec (self->throw);
		2334	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2335
		2336	void
1876	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2337	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2338	PROTOTYPE: $;$
		2339	C_ARGS: aTHX_ coro, flags
1877		2340
1878	SV *	2341	SV *
1879	has_cctx (Coro::State coro)	2342	has_cctx (Coro::State coro)
1880	PROTOTYPE: $	2343	PROTOTYPE: $
1881	CODE:	2344	CODE:
…		…
1889	CODE:	2352	CODE:
1890	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2353	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1891	OUTPUT:	2354	OUTPUT:
1892	RETVAL	2355	RETVAL
1893		2356
1894	IV	2357	UV
1895	rss (Coro::State coro)	2358	rss (Coro::State coro)
1896	PROTOTYPE: $	2359	PROTOTYPE: $
1897	ALIAS:	2360	ALIAS:
1898	usecount = 1	2361	usecount = 1
1899	CODE:	2362	CODE:
…		…
1905	OUTPUT:	2368	OUTPUT:
1906	RETVAL	2369	RETVAL
1907		2370
1908	void	2371	void
1909	force_cctx ()	2372	force_cctx ()
		2373	PROTOTYPE:
1910	CODE:	2374	CODE:
1911	struct coro *coro = SvSTATE (coro_current);	2375	struct coro *coro = SvSTATE (coro_current);
1912	coro->cctx->idle_sp = 0;	2376	coro->cctx->idle_sp = 0;
1913
1914	void
1915	throw (Coro::State self, SV *throw = &PL_sv_undef)
1916	PROTOTYPE: $;$
1917	CODE:
1918	SvREFCNT_dec (self->throw);
1919	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1920		2377
1921	void	2378	void
1922	swap_defsv (Coro::State self)	2379	swap_defsv (Coro::State self)
1923	PROTOTYPE: $	2380	PROTOTYPE: $
1924	ALIAS:	2381	ALIAS:
1925	swap_defav = 1	2382	swap_defav = 1
1926	CODE:	2383	CODE:
1927	if (!self->slot)	2384	if (!self->slot)
1928	croak ("cannot swap state with coroutine that has no saved state");	2385	croak ("cannot swap state with coroutine that has no saved state,");
1929	else	2386	else
1930	{	2387	{
1931	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2388	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1932	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2389	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1933		2390
…		…
1958		2415
1959	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2416	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1960	coro_ready[i] = newAV ();	2417	coro_ready[i] = newAV ();
1961		2418
1962	{	2419	{
1963	SV *sv = perl_get_sv ("Coro::API", TRUE);	2420	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1964	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1965		2421
1966	coroapi.schedule = api_schedule;	2422	coroapi.schedule = api_schedule;
1967	coroapi.cede = api_cede;	2423	coroapi.cede = api_cede;
1968	coroapi.cede_notself = api_cede_notself;	2424	coroapi.cede_notself = api_cede_notself;
1969	coroapi.ready = api_ready;	2425	coroapi.ready = api_ready;
1970	coroapi.is_ready = api_is_ready;	2426	coroapi.is_ready = api_is_ready;
1971	coroapi.nready = &coro_nready;	2427	coroapi.nready = coro_nready;
1972	coroapi.current = coro_current;	2428	coroapi.current = coro_current;
1973		2429
1974	GCoroAPI = &coroapi;	2430	GCoroAPI = &coroapi;
1975	sv_setiv (sv, (IV)&coroapi);	2431	sv_setiv (sv, (IV)&coroapi);
1976	SvREADONLY_on (sv);	2432	SvREADONLY_on (sv);
1977	}	2433	}
1978	}	2434	}
		2435
		2436	void
		2437	schedule (...)
		2438	CODE:
		2439	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
		2440
		2441	void
		2442	cede (...)
		2443	CODE:
		2444	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
		2445
		2446	void
		2447	cede_notself (...)
		2448	CODE:
		2449	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
1979		2450
1980	void	2451	void
1981	_set_current (SV *current)	2452	_set_current (SV *current)
1982	PROTOTYPE: $	2453	PROTOTYPE: $
1983	CODE:	2454	CODE:
1984	SvREFCNT_dec (SvRV (coro_current));	2455	SvREFCNT_dec (SvRV (coro_current));
1985	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	2456	SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1986		2457
1987	void	2458	void
1988	_set_readyhook (SV *hook)	2459	_set_readyhook (SV *hook)
1989	PROTOTYPE: $	2460	PROTOTYPE: $
1990	CODE:	2461	CODE:
1991	LOCK;
1992	SvREFCNT_dec (coro_readyhook);	2462	SvREFCNT_dec (coro_readyhook);
1993	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2463	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1994	UNLOCK;
1995		2464
1996	int	2465	int
1997	prio (Coro::State coro, int newprio = 0)	2466	prio (Coro::State coro, int newprio = 0)
		2467	PROTOTYPE: $;$
1998	ALIAS:	2468	ALIAS:
1999	nice = 1	2469	nice = 1
2000	CODE:	2470	CODE:
2001	{	2471	{
2002	RETVAL = coro->prio;	2472	RETVAL = coro->prio;
…		…
2017		2487
2018	SV *	2488	SV *
2019	ready (SV *self)	2489	ready (SV *self)
2020	PROTOTYPE: $	2490	PROTOTYPE: $
2021	CODE:	2491	CODE:
2022	RETVAL = boolSV (api_ready (self));	2492	RETVAL = boolSV (api_ready (aTHX_ self));
2023	OUTPUT:	2493	OUTPUT:
2024	RETVAL	2494	RETVAL
2025		2495
2026	int	2496	int
2027	nready (...)	2497	nready (...)
…		…
2050	SvREFCNT_dec (old);	2520	SvREFCNT_dec (old);
2051	croak ("\3async_pool terminate\2\n");	2521	croak ("\3async_pool terminate\2\n");
2052	}	2522	}
2053		2523
2054	SvREFCNT_dec (coro->saved_deffh);	2524	SvREFCNT_dec (coro->saved_deffh);
2055	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);	2525	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2056		2526
2057	hv_store (hv, "desc", sizeof ("desc") - 1,	2527	hv_store (hv, "desc", sizeof ("desc") - 1,
2058	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);	2528	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2059		2529
2060	invoke_av = (AV *)SvRV (invoke);	2530	invoke_av = (AV *)SvRV (invoke);
…		…
2064		2534
2065	if (len > 0)	2535	if (len > 0)
2066	{	2536	{
2067	av_fill (defav, len - 1);	2537	av_fill (defav, len - 1);
2068	for (i = 0; i < len; ++i)	2538	for (i = 0; i < len; ++i)
2069	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));	2539	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2070	}	2540	}
2071
2072	SvREFCNT_dec (invoke);
2073	}	2541	}
2074		2542
2075	void	2543	void
2076	_pool_2 (SV *cb)	2544	_pool_2 (SV *cb)
2077	CODE:	2545	CODE:
…		…
2081	sv_setsv (cb, &PL_sv_undef);	2549	sv_setsv (cb, &PL_sv_undef);
2082		2550
2083	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2551	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2084	coro->saved_deffh = 0;	2552	coro->saved_deffh = 0;
2085		2553
2086	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2554	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2087	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2555	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2088	{	2556	{
2089	SV *old = PL_diehook;	2557	SV *old = PL_diehook;
2090	PL_diehook = 0;	2558	PL_diehook = 0;
2091	SvREFCNT_dec (old);	2559	SvREFCNT_dec (old);
…		…
2097	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2565	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2098		2566
2099	coro->prio = 0;	2567	coro->prio = 0;
2100		2568
2101	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2569	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2102	api_trace (coro_current, 0);	2570	api_trace (aTHX_ coro_current, 0);
2103		2571
2104	av_push (av_async_pool, newSVsv (coro_current));	2572	av_push (av_async_pool, newSVsv (coro_current));
2105	}	2573	}
2106		2574
2107	#if 0	2575
		2576	MODULE = Coro::State PACKAGE = Coro::AIO
2108		2577
2109	void	2578	void
2110	_generator_call (...)	2579	_get_state (SV *self)
2111	PROTOTYPE: @	2580	PROTOTYPE: $
2112	PPCODE:	2581	PPCODE:
2113	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2114	xxxx
2115	abort ();
2116
2117	SV *
2118	gensub (SV *sub, ...)
2119	PROTOTYPE: &;@
2120	CODE:
2121	{	2582	{
2122	struct coro *coro;	2583	AV *defav = GvAV (PL_defgv);
2123	MAGIC *mg;	2584	AV *av = newAV ();
2124	CV *xcv;
2125	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2126	int i;	2585	int i;
2127
2128	CvGV (ncv) = CvGV (cv);
2129	CvFILE (ncv) = CvFILE (cv);
2130
2131	Newz (0, coro, 1, struct coro);
2132	coro->args = newAV ();
2133	coro->flags = CF_NEW;
2134
2135	av_extend (coro->args, items - 1);
2136	for (i = 1; i < items; i++)
2137	av_push (coro->args, newSVsv (ST (i)));
2138
2139	CvISXSUB_on (ncv);
2140	CvXSUBANY (ncv).any_ptr = (void *)coro;
2141
2142	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2143
2144	CvXSUB (ncv) = CvXSUB (xcv);
2145	CvANON_on (ncv);
2146
2147	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2148	RETVAL = newRV_noinc ((SV *)ncv);
2149	}
2150	OUTPUT:
2151	RETVAL
2152
2153	#endif
2154
2155
2156	MODULE = Coro::State PACKAGE = Coro::AIO
2157
2158	SV *
2159	_get_state ()
2160	CODE:
2161	{
2162	struct io_state *data;
2163
2164	RETVAL = newSV (sizeof (struct io_state));	2586	SV *data_sv = newSV (sizeof (struct io_state));
2165	data = (struct io_state *)SvPVX (RETVAL);	2587	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2166	SvCUR_set (RETVAL, sizeof (struct io_state));	2588	SvCUR_set (data_sv, sizeof (struct io_state));
2167	SvPOK_only (RETVAL);	2589	SvPOK_only (data_sv);
2168		2590
2169	data->errorno = errno;	2591	data->errorno = errno;
2170	data->laststype = PL_laststype;	2592	data->laststype = PL_laststype;
2171	data->laststatval = PL_laststatval;	2593	data->laststatval = PL_laststatval;
2172	data->statcache = PL_statcache;	2594	data->statcache = PL_statcache;
		2595
		2596	av_extend (av, AvFILLp (defav) + 1 + 1);
		2597
		2598	for (i = 0; i <= AvFILLp (defav); ++i)
		2599	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
		2600
		2601	av_push (av, data_sv);
		2602
		2603	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		2604
		2605	api_ready (aTHX_ self);
2173	}	2606	}
2174	OUTPUT:
2175	RETVAL
2176		2607
2177	void	2608	void
2178	_set_state (char *data_)	2609	_set_state (SV *state)
2179	PROTOTYPE: $	2610	PROTOTYPE: $
2180	CODE:	2611	PPCODE:
2181	{	2612	{
2182	struct io_state *data = (void *)data_;	2613	AV *av = (AV *)SvRV (state);
		2614	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
		2615	int i;
2183		2616
2184	errno = data->errorno;	2617	errno = data->errorno;
2185	PL_laststype = data->laststype;	2618	PL_laststype = data->laststype;
2186	PL_laststatval = data->laststatval;	2619	PL_laststatval = data->laststatval;
2187	PL_statcache = data->statcache;	2620	PL_statcache = data->statcache;
		2621
		2622	EXTEND (SP, AvFILLp (av));
		2623	for (i = 0; i < AvFILLp (av); ++i)
		2624	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2188	}	2625	}
2189		2626
2190		2627
2191	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2628	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2192		2629
2193	BOOT:	2630	BOOT:
2194	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2631	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2195		2632
2196	SV *	2633	void
2197	_schedule (...)	2634	_schedule (...)
2198	PROTOTYPE: @
2199	CODE:	2635	CODE:
2200	{	2636	{
2201	static int incede;	2637	static int incede;
2202		2638
2203	api_cede_notself ();	2639	api_cede_notself (aTHX);
2204		2640
2205	++incede;	2641	++incede;
2206	while (coro_nready >= incede && api_cede ())	2642	while (coro_nready >= incede && api_cede (aTHX))
2207	;	2643	;
2208		2644
2209	sv_setsv (sv_activity, &PL_sv_undef);	2645	sv_setsv (sv_activity, &PL_sv_undef);
2210	if (coro_nready >= incede)	2646	if (coro_nready >= incede)
2211	{	2647	{
…		…
2216	}	2652	}
2217		2653
2218	--incede;	2654	--incede;
2219	}	2655	}
2220		2656
		2657
		2658	MODULE = Coro::State PACKAGE = PerlIO::cede
		2659
		2660	BOOT:
		2661	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2662
		2663	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2664
		2665	SV *
		2666	new (SV *klass, SV *count_ = 0)
		2667	CODE:
		2668	{
		2669	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2670	AV *av = newAV ();
		2671	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2672	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2673	}
		2674	OUTPUT:
		2675	RETVAL
		2676
		2677	SV *
		2678	count (SV *self)
		2679	CODE:
		2680	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2681	OUTPUT:
		2682	RETVAL
		2683
		2684	void
		2685	up (SV *self, int adjust = 1)
		2686	ALIAS:
		2687	adjust = 1
		2688	CODE:
		2689	coro_semaphore_adjust ((AV *)SvRV (self), ix ? adjust : 1);
		2690
		2691	void
		2692	down (SV *self)
		2693	CODE:
		2694	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
		2695
		2696	void
		2697	try (SV *self)
		2698	PPCODE:
		2699	{
		2700	AV *av = (AV *)SvRV (self);
		2701	SV *count_sv = AvARRAY (av)[0];
		2702	IV count = SvIVX (count_sv);
		2703
		2704	if (count > 0)
		2705	{
		2706	--count;
		2707	SvIVX (count_sv) = count;
		2708	XSRETURN_YES;
		2709	}
		2710	else
		2711	XSRETURN_NO;
		2712	}
		2713
		2714	void
		2715	waiters (SV *self)
		2716	CODE:
		2717	{
		2718	AV *av = (AV *)SvRV (self);
		2719
		2720	if (GIMME_V == G_SCALAR)
		2721	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2722	else
		2723	{
		2724	int i;
		2725	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2726	for (i = 1; i <= AvFILLp (av); ++i)
		2727	PUSHs (newSVsv (AvARRAY (av)[i]));
		2728	}
		2729	}
		2730

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