[ViewVC] Diff of: 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 1.279 by root, Sun Nov 16 08:59:16 2008 UTC

…		…
4	#define PERL_EXT	4	#define PERL_EXT
5		5
6	#include "EXTERN.h"	6	#include "EXTERN.h"
7	#include "perl.h"	7	#include "perl.h"
8	#include "XSUB.h"	8	#include "XSUB.h"
		9	#include "perliol.h"
9		10
10	#include "patchlevel.h"	11	#include "patchlevel.h"
11		12
12	#include <stdio.h>	13	#include <stdio.h>
13	#include <errno.h>	14	#include <errno.h>
…		…
45	# define BOOT_PAGESIZE (void)0	46	# define BOOT_PAGESIZE (void)0
46	#endif	47	#endif
47		48
48	#if CORO_USE_VALGRIND	49	#if CORO_USE_VALGRIND
49	# include <valgrind/valgrind.h>	50	# include <valgrind/valgrind.h>
50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51	#else
52	# define REGISTER_STACK(cctx,start,end)
53	#endif	51	#endif
54		52
55	/* the maximum number of idle cctx that will be pooled */	53	/* the maximum number of idle cctx that will be pooled */
56	#define MAX_IDLE_CCTX 8	54	static int cctx_max_idle = 4;
57		55
58	#define PERL_VERSION_ATLEAST(a,b,c) \	56	#define PERL_VERSION_ATLEAST(a,b,c) \
59	(PERL_REVISION > (a) \	57	(PERL_REVISION > (a) \
60	\|\| (PERL_REVISION == (a) \	58	\|\| (PERL_REVISION == (a) \
61	&& (PERL_VERSION > (b) \	59	&& (PERL_VERSION > (b) \
…		…
80	# ifndef IS_PADCONST	78	# ifndef IS_PADCONST
81	# define IS_PADCONST(v) 0	79	# define IS_PADCONST(v) 0
82	# endif	80	# endif
83	#endif	81	#endif
84		82
		83	/* 5.11 */
		84	#ifndef CxHASARGS
		85	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		86	#endif
		87
		88	/* 5.10.0 */
		89	#ifndef SvREFCNT_inc_NN
		90	# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
		91	#endif
		92
85	/* 5.8.8 */	93	/* 5.8.8 */
86	#ifndef GV_NOTQUAL	94	#ifndef GV_NOTQUAL
87	# define GV_NOTQUAL 0	95	# define GV_NOTQUAL 0
88	#endif	96	#endif
89	#ifndef newSV	97	#ifndef newSV
90	# define newSV(l) NEWSV(0,l)	98	# define newSV(l) NEWSV(0,l)
91	#endif	99	#endif
92		100
93	/* 5.11 */
94	#ifndef CxHASARGS
95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96	#endif
97
98	/* 5.8.7 */	101	/* 5.8.7 */
99	#ifndef SvRV_set	102	#ifndef SvRV_set
100	# define SvRV_set(s,v) SvRV(s) = (v)	103	# define SvRV_set(s,v) SvRV(s) = (v)
101	#endif	104	#endif
102		105
…		…
113	# define CORO_PREFER_PERL_FUNCTIONS 0	116	# define CORO_PREFER_PERL_FUNCTIONS 0
114	#endif	117	#endif
115		118
116	/* The next macros try to return the current stack pointer, in an as	119	/* The next macros try to return the current stack pointer, in an as
117	* portable way as possible. */	120	* portable way as possible. */
118	#define dSTACKLEVEL volatile char stacklevel	121	#if __GNUC__ >= 4
119	#define STACKLEVEL ((void *)&stacklevel)	122	# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
		123	#else
		124	# define dSTACKLEVEL volatile void stacklevel = (volatile void )&stacklevel
		125	#endif
120		126
121	#define IN_DESTRUCT (PL_main_cv == Nullcv)	127	#define IN_DESTRUCT (PL_main_cv == Nullcv)
122		128
123	#if __GNUC__ >= 3	129	#if __GNUC__ >= 3
124	# define attribute(x) __attribute__(x)	130	# define attribute(x) __attribute__(x)
125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126	# define expect(expr,value) __builtin_expect ((expr),(value))	131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define INLINE static inline
127	#else	133	#else
128	# define attribute(x)	134	# define attribute(x)
129	# define BARRIER
130	# define expect(expr,value) (expr)	135	# define expect(expr,value) (expr)
		136	# define INLINE static
131	#endif	137	#endif
132		138
133	#define expect_false(expr) expect ((expr) != 0, 0)	139	#define expect_false(expr) expect ((expr) != 0, 0)
134	#define expect_true(expr) expect ((expr) != 0, 1)	140	#define expect_true(expr) expect ((expr) != 0, 1)
135		141
136	#define NOINLINE attribute ((noinline))	142	#define NOINLINE attribute ((noinline))
137		143
138	#include "CoroAPI.h"	144	#include "CoroAPI.h"
139		145
140	#ifdef USE_ITHREADS	146	#ifdef USE_ITHREADS
		147
141	static perl_mutex coro_mutex;	148	static perl_mutex coro_lock;
142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	149	# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	150	# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
		151	# if CORO_PTHREAD
		152	static void *coro_thx;
		153	# endif
		154
144	#else	155	#else
		156
145	# define LOCK (void)0	157	# define LOCK (void)0
146	# define UNLOCK (void)0	158	# define UNLOCK (void)0
		159
147	#endif	160	#endif
		161
		162	# undef LOCK
		163	# define LOCK (void)0
		164	# undef UNLOCK
		165	# define UNLOCK (void)0
148		166
149	/* helper storage struct for Coro::AIO */	167	/* helper storage struct for Coro::AIO */
150	struct io_state	168	struct io_state
151	{	169	{
		170	AV *res;
152	int errorno;	171	int errorno;
153	I32 laststype;	172	I32 laststype; /* U16 in 5.10.0 */
154	int laststatval;	173	int laststatval;
155	Stat_t statcache;	174	Stat_t statcache;
156	};	175	};
157		176
		177	static double (nvtime)(); / so why doesn't it take void? */
		178
		179	static U32 cctx_gen;
158	static size_t coro_stacksize = CORO_STACKSIZE;	180	static size_t cctx_stacksize = CORO_STACKSIZE;
159	static struct CoroAPI coroapi;	181	static struct CoroAPI coroapi;
160	static AV main_mainstack; / used to differentiate between $main and others */	182	static AV main_mainstack; / used to differentiate between $main and others */
161	static JMPENV *main_top_env;	183	static JMPENV *main_top_env;
162	static HV coro_state_stash, coro_stash;	184	static HV coro_state_stash, coro_stash;
163	static volatile SV coro_mortal; / will be freed after next transfer */	185	static volatile SV coro_mortal; / will be freed/thrown after next transfer */
		186	static volatile struct coro *transfer_next;
164		187
165	static GV irsgv; / $/ */	188	static GV irsgv; / $/ */
166	static GV stdoutgv; / STDOUT /	189	static GV stdoutgv; / STDOUT /
167	static SV *rv_diehook;	190	static SV *rv_diehook;
168	static SV *rv_warnhook;	191	static SV *rv_warnhook;
…		…
187	CC_TRACE_LINE = 0x10, /* trace each statement */	210	CC_TRACE_LINE = 0x10, /* trace each statement */
188	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,	211	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
189	};	212	};
190		213
191	/* this is a structure representing a c-level coroutine */	214	/* this is a structure representing a c-level coroutine */
192	typedef struct coro_cctx {	215	typedef struct coro_cctx
		216	{
193	struct coro_cctx *next;	217	struct coro_cctx *next;
194		218
195	/* the stack */	219	/* the stack */
196	void *sptr;	220	void *sptr;
197	size_t ssize;	221	size_t ssize;
…		…
200	void idle_sp; / sp of top-level transfer/schedule/cede call */	224	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 */	225	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
202	JMPENV *top_env;	226	JMPENV *top_env;
203	coro_context cctx;	227	coro_context cctx;
204		228
		229	U32 gen;
205	#if CORO_USE_VALGRIND	230	#if CORO_USE_VALGRIND
206	int valgrind_id;	231	int valgrind_id;
207	#endif	232	#endif
208	unsigned char flags;	233	unsigned char flags;
209	} coro_cctx;	234	} coro_cctx;
…		…
214	CF_NEW = 0x0004, /* has never been switched to */	239	CF_NEW = 0x0004, /* has never been switched to */
215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	240	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216	};	241	};
217		242
218	/* the structure where most of the perl state is stored, overlaid on the cxstack */	243	/* the structure where most of the perl state is stored, overlaid on the cxstack */
219	typedef struct {	244	typedef struct
		245	{
220	SV *defsv;	246	SV *defsv;
221	AV *defav;	247	AV *defav;
222	SV *errsv;	248	SV *errsv;
223	SV *irsgv;	249	SV *irsgv;
224	#define VAR(name,type) type name;	250	#define VAR(name,type) type name;
…		…
228		254
229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	255	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230		256
231	/* this is a structure representing a perl-level coroutine */	257	/* this is a structure representing a perl-level coroutine */
232	struct coro {	258	struct coro {
233	/* the c coroutine allocated to this perl coroutine, if any */	259	/* the C coroutine allocated to this perl coroutine, if any */
234	coro_cctx *cctx;	260	coro_cctx *cctx;
235		261
236	/* process data */	262	/* process data */
		263	struct CoroSLF slf_frame; /* saved slf frame */
237	AV *mainstack;	264	AV *mainstack;
238	perl_slots slot; / basically the saved sp */	265	perl_slots slot; / basically the saved sp */
239		266
240	AV args; / data associated with this coroutine (initial args) */	267	AV args; / data associated with this coroutine (initial args) */
241	int refcnt; /* coroutines are refcounted, yes */	268	int refcnt; /* coroutines are refcounted, yes */
…		…
256	struct coro next, prev;	283	struct coro next, prev;
257	};	284	};
258		285
259	typedef struct coro *Coro__State;	286	typedef struct coro *Coro__State;
260	typedef struct coro *Coro__State_or_hashref;	287	typedef struct coro *Coro__State_or_hashref;
		288
		289	static struct CoroSLF slf_frame; /* the current slf frame */
261		290
262	/ Coro ******************************************************************/	291	/ Coro ******************************************************************/
263		292
264	#define PRIO_MAX 3	293	#define PRIO_MAX 3
265	#define PRIO_HIGH 1	294	#define PRIO_HIGH 1
…		…
269	#define PRIO_MIN -4	298	#define PRIO_MIN -4
270		299
271	/* for Coro.pm */	300	/* for Coro.pm */
272	static SV *coro_current;	301	static SV *coro_current;
273	static SV *coro_readyhook;	302	static SV *coro_readyhook;
274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	303	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275	static int coro_nready;
276	static struct coro *coro_first;	304	static struct coro *coro_first;
		305	#define coro_nready coroapi.nready
277		306
278	/ lowlevel stuff ********************************************************/	307	/ lowlevel stuff ********************************************************/
279		308
280	static SV *	309	static SV *
281	coro_get_sv (pTHX_ const char *name, int create)	310	coro_get_sv (pTHX_ const char *name, int create)
…		…
321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	350	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322	#endif	351	#endif
323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	352	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324	--AvFILLp (padlist);	353	--AvFILLp (padlist);
325		354
326	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	355	av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327	av_store (newpadlist, 1, (SV *)newpad);	356	av_store (newpadlist, 1, (SV *)newpad);
328		357
329	return newpadlist;	358	return newpadlist;
330	}	359	}
331		360
…		…
361		390
362	/* casting is fun. */	391	/* casting is fun. */
363	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	392	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
364	free_padlist (aTHX_ padlist);	393	free_padlist (aTHX_ padlist);
365		394
366	SvREFCNT_dec (av);	395	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
367		396
368	return 0;	397	return 0;
369	}	398	}
370		399
371	#define CORO_MAGIC_type_cv PERL_MAGIC_ext	400	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
…		…
374	static MGVTBL coro_cv_vtbl = {	403	static MGVTBL coro_cv_vtbl = {
375	0, 0, 0, 0,	404	0, 0, 0, 0,
376	coro_cv_free	405	coro_cv_free
377	};	406	};
378		407
379	#define CORO_MAGIC(sv,type) \	408	#define CORO_MAGIC(sv, type) \
380	SvMAGIC (sv) \	409	SvMAGIC (sv) \
381	? SvMAGIC (sv)->mg_type == type \	410	? SvMAGIC (sv)->mg_type == type \
382	? SvMAGIC (sv) \	411	? SvMAGIC (sv) \
383	: mg_find (sv, type) \	412	: mg_find (sv, type) \
384	: 0	413	: 0
385		414
386	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	415	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
387	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)	416	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
388		417
389	static struct coro *	418	INLINE struct coro *
390	SvSTATE_ (pTHX_ SV *coro)	419	SvSTATE_ (pTHX_ SV *coro)
391	{	420	{
392	HV *stash;	421	HV *stash;
393	MAGIC *mg;	422	MAGIC *mg;
394		423
…		…
485	CvPADLIST (cv) = (AV *)POPs;	514	CvPADLIST (cv) = (AV *)POPs;
486	}	515	}
487		516
488	PUTBACK;	517	PUTBACK;
489	}	518	}
		519
		520	slf_frame = c->slf_frame;
490	}	521	}
491		522
492	static void	523	static void
493	save_perl (pTHX_ Coro__State c)	524	save_perl (pTHX_ Coro__State c)
494	{	525	{
		526	c->slf_frame = slf_frame;
		527
495	{	528	{
496	dSP;	529	dSP;
497	I32 cxix = cxstack_ix;	530	I32 cxix = cxstack_ix;
498	PERL_CONTEXT *ccstk = cxstack;	531	PERL_CONTEXT *ccstk = cxstack;
499	PERL_SI *top_si = PL_curstackinfo;	532	PERL_SI *top_si = PL_curstackinfo;
…		…
566	#undef VAR	599	#undef VAR
567	}	600	}
568	}	601	}
569		602
570	/*	603	/*
571	* allocate various perl stacks. This is an exact copy	604	* allocate various perl stacks. This is almost an exact copy
572	* of perl.c:init_stacks, except that it uses less memory	605	* of perl.c:init_stacks, except that it uses less memory
573	* on the (sometimes correct) assumption that coroutines do	606	* on the (sometimes correct) assumption that coroutines do
574	* not usually need a lot of stackspace.	607	* not usually need a lot of stackspace.
575	*/	608	*/
576	#if CORO_PREFER_PERL_FUNCTIONS	609	#if CORO_PREFER_PERL_FUNCTIONS
…		…
619		652
620	/*	653	/*
621	* destroy the stacks, the callchain etc...	654	* destroy the stacks, the callchain etc...
622	*/	655	*/
623	static void	656	static void
624	coro_destroy_stacks (pTHX)	657	coro_destruct_stacks (pTHX)
625	{	658	{
626	while (PL_curstackinfo->si_next)	659	while (PL_curstackinfo->si_next)
627	PL_curstackinfo = PL_curstackinfo->si_next;	660	PL_curstackinfo = PL_curstackinfo->si_next;
628		661
629	while (PL_curstackinfo)	662	while (PL_curstackinfo)
…		…
666	#undef VAR	699	#undef VAR
667	}	700	}
668	else	701	else
669	slot = coro->slot;	702	slot = coro->slot;
670		703
		704	if (slot)
		705	{
671	rss += sizeof (slot->curstackinfo);	706	rss += sizeof (slot->curstackinfo);
672	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	707	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
673	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);	708	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
674	rss += slot->tmps_max * sizeof (SV *);	709	rss += slot->tmps_max * sizeof (SV *);
675	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);	710	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
676	rss += slot->scopestack_max * sizeof (I32);	711	rss += slot->scopestack_max * sizeof (I32);
677	rss += slot->savestack_max * sizeof (ANY);	712	rss += slot->savestack_max * sizeof (ANY);
678		713
679	#if !PERL_VERSION_ATLEAST (5,10,0)	714	#if !PERL_VERSION_ATLEAST (5,10,0)
680	rss += slot->retstack_max * sizeof (OP *);	715	rss += slot->retstack_max * sizeof (OP *);
681	#endif	716	#endif
		717	}
682	}	718	}
683		719
684	return rss;	720	return rss;
685	}	721	}
686		722
…		…
775		811
776	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	812	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
777	}	813	}
778		814
779	static void	815	static void
		816	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		817	{
		818	/* kind of mega-hacky, but works */
		819	ta->next = ta->prev = (struct coro *)ta;
		820	}
		821
		822	static int
		823	slf_check_nop (pTHX_ struct CoroSLF *frame)
		824	{
		825	return 0;
		826	}
		827
		828	static void
780	coro_setup (pTHX_ struct coro *coro)	829	coro_setup (pTHX_ struct coro *coro)
781	{	830	{
782	/*	831	/*
783	* emulate part of the perl startup here.	832	* emulate part of the perl startup here.
784	*/	833	*/
…		…
804	GvSV (PL_defgv) = newSV (0);	853	GvSV (PL_defgv) = newSV (0);
805	GvAV (PL_defgv) = coro->args; coro->args = 0;	854	GvAV (PL_defgv) = coro->args; coro->args = 0;
806	GvSV (PL_errgv) = newSV (0);	855	GvSV (PL_errgv) = newSV (0);
807	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);	856	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
808	PL_rs = newSVsv (GvSV (irsgv));	857	PL_rs = newSVsv (GvSV (irsgv));
809	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);	858	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
810		859
811	{	860	{
812	dSP;	861	dSP;
813	LOGOP myop;	862	UNOP myop;
814		863
815	Zero (&myop, 1, LOGOP);	864	Zero (&myop, 1, UNOP);
816	myop.op_next = Nullop;	865	myop.op_next = Nullop;
817	myop.op_flags = OPf_WANT_VOID;	866	myop.op_flags = OPf_WANT_VOID;
818		867
819	PUSHMARK (SP);	868	PUSHMARK (SP);
820	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	869	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
823	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	872	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
824	SPAGAIN;	873	SPAGAIN;
825	}	874	}
826		875
827	/* this newly created coroutine might be run on an existing cctx which most	876	/* this newly created coroutine might be run on an existing cctx which most
828	* likely was suspended in set_stacklevel, called from entersub.	877	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
829	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
830	* so we ENTER here for symmetry
831	*/	878	*/
832	ENTER;	879	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		880	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
833	}	881	}
834		882
835	static void	883	static void
836	coro_destroy (pTHX_ struct coro *coro)	884	coro_destruct (pTHX_ struct coro *coro)
837	{	885	{
838	if (!IN_DESTRUCT)	886	if (!IN_DESTRUCT)
839	{	887	{
840	/* restore all saved variables and stuff */	888	/* restore all saved variables and stuff */
841	LEAVE_SCOPE (0);	889	LEAVE_SCOPE (0);
…		…
863	SvREFCNT_dec (PL_warnhook);	911	SvREFCNT_dec (PL_warnhook);
864		912
865	SvREFCNT_dec (coro->saved_deffh);	913	SvREFCNT_dec (coro->saved_deffh);
866	SvREFCNT_dec (coro->throw);	914	SvREFCNT_dec (coro->throw);
867		915
868	coro_destroy_stacks (aTHX);	916	coro_destruct_stacks (aTHX);
869	}	917	}
870		918
871	static void	919	INLINE void
872	free_coro_mortal (pTHX)	920	free_coro_mortal (pTHX)
873	{	921	{
874	if (expect_true (coro_mortal))	922	if (expect_true (coro_mortal))
875	{	923	{
876	SvREFCNT_dec (coro_mortal);	924	SvREFCNT_dec (coro_mortal);
…		…
910	: cx->blk_gimme == G_SCALAR ? bot + 1	958	: cx->blk_gimme == G_SCALAR ? bot + 1
911	: bot;	959	: bot;
912		960
913	av_extend (av, top - bot);	961	av_extend (av, top - bot);
914	while (bot < top)	962	while (bot < top)
915	av_push (av, SvREFCNT_inc (*bot++));	963	av_push (av, SvREFCNT_inc_NN (*bot++));
916		964
917	PL_runops = RUNOPS_DEFAULT;	965	PL_runops = RUNOPS_DEFAULT;
918	ENTER;	966	ENTER;
919	SAVETMPS;	967	SAVETMPS;
920	EXTEND (SP, 3);	968	EXTEND (SP, 3);
…		…
1000		1048
1001	TAINT_NOT;	1049	TAINT_NOT;
1002	return 0;	1050	return 0;
1003	}	1051	}
1004		1052
		1053	static void
		1054	prepare_set_stacklevel (struct coro_transfer_args ta, struct coro_cctx cctx)
		1055	{
		1056	ta->prev = (struct coro *)cctx;
		1057	ta->next = 0;
		1058	}
		1059
1005	/* inject a fake call to Coro::State::_cctx_init into the execution */	1060	/* inject a fake call to Coro::State::_cctx_init into the execution */
1006	/* _cctx_init should be careful, as it could be called at almost any time */	1061	/* _cctx_init should be careful, as it could be called at almost any time */
1007	/* during execution of a perl program */	1062	/* during execution of a perl program */
		1063	/* also initialises PL_top_env */
1008	static void NOINLINE	1064	static void NOINLINE
1009	cctx_prepare (pTHX_ coro_cctx *cctx)	1065	cctx_prepare (pTHX_ coro_cctx *cctx)
1010	{	1066	{
1011	dSP;	1067	dSP;
1012	LOGOP myop;	1068	UNOP myop;
1013		1069
1014	PL_top_env = &PL_start_env;	1070	PL_top_env = &PL_start_env;
1015		1071
1016	if (cctx->flags & CC_TRACE)	1072	if (cctx->flags & CC_TRACE)
1017	PL_runops = runops_trace;	1073	PL_runops = runops_trace;
1018		1074
1019	Zero (&myop, 1, LOGOP);	1075	Zero (&myop, 1, UNOP);
1020	myop.op_next = PL_op;	1076	myop.op_next = PL_op;
1021	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	1077	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
1022		1078
1023	PUSHMARK (SP);	1079	PUSHMARK (SP);
1024	EXTEND (SP, 2);	1080	EXTEND (SP, 2);
1025	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1081	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1026	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1082	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1027	PUTBACK;	1083	PUTBACK;
1028	PL_op = (OP *)&myop;	1084	PL_op = (OP *)&myop;
1029	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1085	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1030	SPAGAIN;	1086	SPAGAIN;
1031	}	1087	}
1032		1088
		1089	/* the tail of transfer: execute stuff we can only do after a transfer */
		1090	INLINE void
		1091	transfer_tail (pTHX)
		1092	{
		1093	struct coro next = (struct coro )transfer_next;
		1094	assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
		1095	assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
		1096
		1097	free_coro_mortal (aTHX);
		1098	UNLOCK;
		1099
		1100	if (expect_false (next->throw))
		1101	{
		1102	SV *exception = sv_2mortal (next->throw);
		1103
		1104	next->throw = 0;
		1105	sv_setsv (ERRSV, exception);
		1106	croak (0);
		1107	}
		1108	}
		1109
1033	/*	1110	/*
1034	* this is a _very_ stripped down perl interpreter ;)	1111	* this is a _very_ stripped down perl interpreter ;)
1035	*/	1112	*/
1036	static void	1113	static void
1037	cctx_run (void *arg)	1114	cctx_run (void *arg)
1038	{	1115	{
		1116	#ifdef USE_ITHREADS
		1117	# if CORO_PTHREAD
		1118	PERL_SET_CONTEXT (coro_thx);
		1119	# endif
		1120	#endif
		1121	{
1039	dTHX;	1122	dTHX;
1040		1123
1041	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1124	/* normally we would need to skip the entersub here */
1042	UNLOCK;	1125	/* 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;	1126	/* PL_nop = PL_nop->op_next */
1046		1127
1047	/* inject a fake subroutine call to cctx_init */	1128	/* inject a fake subroutine call to cctx_init */
1048	cctx_prepare (aTHX_ (coro_cctx *)arg);	1129	cctx_prepare (aTHX_ (coro_cctx *)arg);
1049		1130
		1131	/* cctx_run is the alternative tail of transfer() */
		1132	/* TODO: throwing an exception here might be deadly, VERIFY */
		1133	transfer_tail (aTHX);
		1134
1050	/* somebody or something will hit me for both perl_run and PL_restartop */	1135	/* somebody or something will hit me for both perl_run and PL_restartop */
1051	PL_restartop = PL_op;	1136	PL_restartop = PL_op;
1052	perl_run (PL_curinterp);	1137	perl_run (PL_curinterp);
1053		1138
1054	/*	1139	/*
1055	* If perl-run returns we assume exit() was being called or the coro	1140	* If perl-run returns we assume exit() was being called or the coro
1056	* fell off the end, which seems to be the only valid (non-bug)	1141	* fell off the end, which seems to be the only valid (non-bug)
1057	* reason for perl_run to return. We try to exit by jumping to the	1142	* reason for perl_run to return. We try to exit by jumping to the
1058	* bootstrap-time "top" top_env, as we cannot restore the "main"	1143	* bootstrap-time "top" top_env, as we cannot restore the "main"
1059	* coroutine as Coro has no such concept	1144	* coroutine as Coro has no such concept
1060	*/	1145	*/
1061	PL_top_env = main_top_env;	1146	PL_top_env = main_top_env;
1062	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */	1147	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1148	}
1063	}	1149	}
1064		1150
1065	static coro_cctx *	1151	static coro_cctx *
1066	cctx_new ()	1152	cctx_new ()
1067	{	1153	{
1068	coro_cctx *cctx;	1154	coro_cctx *cctx;
		1155
		1156	++cctx_count;
		1157	New (0, cctx, 1, coro_cctx);
		1158
		1159	cctx->gen = cctx_gen;
		1160	cctx->flags = 0;
		1161	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1162
		1163	return cctx;
		1164	}
		1165
		1166	/* create a new cctx only suitable as source */
		1167	static coro_cctx *
		1168	cctx_new_empty ()
		1169	{
		1170	coro_cctx *cctx = cctx_new ();
		1171
		1172	cctx->sptr = 0;
		1173	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1174
		1175	return cctx;
		1176	}
		1177
		1178	/* create a new cctx suitable as destination/running a perl interpreter */
		1179	static coro_cctx *
		1180	cctx_new_run ()
		1181	{
		1182	coro_cctx *cctx = cctx_new ();
1069	void *stack_start;	1183	void *stack_start;
1070	size_t stack_size;	1184	size_t stack_size;
1071		1185
1072	++cctx_count;
1073
1074	Newz (0, cctx, 1, coro_cctx);
1075
1076	#if HAVE_MMAP	1186	#if HAVE_MMAP
1077	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1187	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1078	/* mmap supposedly does allocate-on-write for us */	1188	/* 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);	1189	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
1080		1190
1081	if (cctx->sptr != (void *)-1)	1191	if (cctx->sptr != (void *)-1)
1082	{	1192	{
1083	# if CORO_STACKGUARD	1193	#if CORO_STACKGUARD
1084	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1194	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1085	# endif	1195	#endif
1086	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1196	stack_start = (char )cctx->sptr + CORO_STACKGUARD PAGESIZE;
1087	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1197	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1088	cctx->flags \|= CC_MAPPED;	1198	cctx->flags \|= CC_MAPPED;
1089	}	1199	}
1090	else	1200	else
1091	#endif	1201	#endif
1092	{	1202	{
1093	cctx->ssize = coro_stacksize * (long)sizeof (long);	1203	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1094	New (0, cctx->sptr, coro_stacksize, long);	1204	New (0, cctx->sptr, cctx_stacksize, long);
1095		1205
1096	if (!cctx->sptr)	1206	if (!cctx->sptr)
1097	{	1207	{
1098	perror ("FATAL: unable to allocate stack for coroutine");	1208	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1099	_exit (EXIT_FAILURE);	1209	_exit (EXIT_FAILURE);
1100	}	1210	}
1101		1211
1102	stack_start = cctx->sptr;	1212	stack_start = cctx->sptr;
1103	stack_size = cctx->ssize;	1213	stack_size = cctx->ssize;
1104	}	1214	}
1105		1215
1106	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);	1216	#if CORO_USE_VALGRIND
		1217	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char )stack_start, (char )stack_start + stack_size);
		1218	#endif
		1219
1107	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1220	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1108		1221
1109	return cctx;	1222	return cctx;
1110	}	1223	}
1111		1224
…		…
1114	{	1227	{
1115	if (!cctx)	1228	if (!cctx)
1116	return;	1229	return;
1117		1230
1118	--cctx_count;	1231	--cctx_count;
		1232	coro_destroy (&cctx->cctx);
1119		1233
		1234	/* coro_transfer creates new, empty cctx's */
		1235	if (cctx->sptr)
		1236	{
1120	#if CORO_USE_VALGRIND	1237	#if CORO_USE_VALGRIND
1121	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1238	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1122	#endif	1239	#endif
1123		1240
1124	#if HAVE_MMAP	1241	#if HAVE_MMAP
1125	if (cctx->flags & CC_MAPPED)	1242	if (cctx->flags & CC_MAPPED)
1126	munmap (cctx->sptr, cctx->ssize);	1243	munmap (cctx->sptr, cctx->ssize);
1127	else	1244	else
1128	#endif	1245	#endif
1129	Safefree (cctx->sptr);	1246	Safefree (cctx->sptr);
		1247	}
1130		1248
1131	Safefree (cctx);	1249	Safefree (cctx);
1132	}	1250	}
1133		1251
1134	/* wether this cctx should be destructed */	1252	/* wether this cctx should be destructed */
1135	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))	1253	#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen \|\| ((cctx)->flags & CC_NOREUSE))
1136		1254
1137	static coro_cctx *	1255	static coro_cctx *
1138	cctx_get (pTHX)	1256	cctx_get (pTHX)
1139	{	1257	{
1140	while (expect_true (cctx_first))	1258	while (expect_true (cctx_first))
…		…
1147	return cctx;	1265	return cctx;
1148		1266
1149	cctx_destroy (cctx);	1267	cctx_destroy (cctx);
1150	}	1268	}
1151		1269
1152	return cctx_new ();	1270	return cctx_new_run ();
1153	}	1271	}
1154		1272
1155	static void	1273	static void
1156	cctx_put (coro_cctx *cctx)	1274	cctx_put (coro_cctx *cctx)
1157	{	1275	{
		1276	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
		1277
1158	/* free another cctx if overlimit */	1278	/* free another cctx if overlimit */
1159	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1279	if (expect_false (cctx_idle >= cctx_max_idle))
1160	{	1280	{
1161	coro_cctx *first = cctx_first;	1281	coro_cctx *first = cctx_first;
1162	cctx_first = first->next;	1282	cctx_first = first->next;
1163	--cctx_idle;	1283	--cctx_idle;
1164		1284
…		…
1176	transfer_check (pTHX_ struct coro prev, struct coro next)	1296	transfer_check (pTHX_ struct coro prev, struct coro next)
1177	{	1297	{
1178	if (expect_true (prev != next))	1298	if (expect_true (prev != next))
1179	{	1299	{
1180	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))	1300	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");	1301	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1182		1302
1183	if (expect_false (next->flags & CF_RUNNING))	1303	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");	1304	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1185		1305
1186	if (expect_false (next->flags & CF_DESTROYED))	1306	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");	1307	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1188		1308
1189	#if !PERL_VERSION_ATLEAST (5,10,0)	1309	#if !PERL_VERSION_ATLEAST (5,10,0)
1190	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1310	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");	1311	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1192	#endif	1312	#endif
1193	}	1313	}
1194	}	1314	}
1195		1315
1196	/* always use the TRANSFER macro */	1316	/* always use the TRANSFER macro */
1197	static void NOINLINE	1317	static void NOINLINE
1198	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)	1318	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
1199	{	1319	{
1200	dSTACKLEVEL;	1320	dSTACKLEVEL;
1201	static volatile int has_throw;
1202		1321
1203	/* sometimes transfer is only called to set idle_sp */	1322	/* sometimes transfer is only called to set idle_sp */
1204	if (expect_false (!next))	1323	if (expect_false (!next))
1205	{	1324	{
1206	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1325	((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 */	1326	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
1208	}	1327	}
1209	else if (expect_true (prev != next))	1328	else if (expect_true (prev != next))
1210	{	1329	{
1211	coro_cctx *prev__cctx;	1330	coro_cctx *prev__cctx;
1212		1331
1213	if (expect_false (prev->flags & CF_NEW))	1332	if (expect_false (prev->flags & CF_NEW))
1214	{	1333	{
1215	/* create a new empty context */	1334	/* create a new empty/source context */
1216	Newz (0, prev->cctx, 1, coro_cctx);	1335	prev->cctx = cctx_new_empty ();
1217	prev->flags &= ~CF_NEW;	1336	prev->flags &= ~CF_NEW;
1218	prev->flags \|= CF_RUNNING;	1337	prev->flags \|= CF_RUNNING;
1219	}	1338	}
1220		1339
1221	prev->flags &= ~CF_RUNNING;	1340	prev->flags &= ~CF_RUNNING;
…		…
1236	else	1355	else
1237	load_perl (aTHX_ next);	1356	load_perl (aTHX_ next);
1238		1357
1239	prev__cctx = prev->cctx;	1358	prev__cctx = prev->cctx;
1240		1359
1241	/* possibly "free" the cctx */	1360	/* possibly untie and reuse the cctx */
1242	if (expect_true (	1361	if (expect_true (
1243	prev__cctx->idle_sp == STACKLEVEL	1362	prev__cctx->idle_sp == (void *)stacklevel
1244	&& !(prev__cctx->flags & CC_TRACE)	1363	&& !(prev__cctx->flags & CC_TRACE)
1245	&& !force_cctx	1364	&& !force_cctx
1246	))	1365	))
1247	{	1366	{
1248	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1367	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1249	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1368	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1250		1369
1251	prev->cctx = 0;	1370	prev->cctx = 0;
1252		1371
1253	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1372	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1254	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1373	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1262	++next->usecount;	1381	++next->usecount;
1263		1382
1264	if (expect_true (!next->cctx))	1383	if (expect_true (!next->cctx))
1265	next->cctx = cctx_get (aTHX);	1384	next->cctx = cctx_get (aTHX);
1266		1385
1267	has_throw = !!next->throw;	1386	assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
		1387	transfer_next = next;
1268		1388
1269	if (expect_false (prev__cctx != next->cctx))	1389	if (expect_false (prev__cctx != next->cctx))
1270	{	1390	{
1271	prev__cctx->top_env = PL_top_env;	1391	prev__cctx->top_env = PL_top_env;
1272	PL_top_env = next->cctx->top_env;	1392	PL_top_env = next->cctx->top_env;
1273	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1393	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1274	}	1394	}
1275		1395
1276	free_coro_mortal (aTHX);	1396	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	}	1397	}
1292	}	1398	}
1293
1294	struct transfer_args
1295	{
1296	struct coro prev, next;
1297	};
1298		1399
1299	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1400	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1300	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1401	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1301		1402
1302	/ high level stuff ******************************************************/	1403	/ high level stuff ******************************************************/
…		…
1322		1423
1323	if (coro->mainstack && coro->mainstack != main_mainstack)	1424	if (coro->mainstack && coro->mainstack != main_mainstack)
1324	{	1425	{
1325	struct coro temp;	1426	struct coro temp;
1326		1427
1327	if (coro->flags & CF_RUNNING)	1428	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1328	croak ("FATAL: tried to destroy currently running coroutine");
1329		1429
1330	save_perl (aTHX_ &temp);	1430	save_perl (aTHX_ &temp);
1331	load_perl (aTHX_ coro);	1431	load_perl (aTHX_ coro);
1332		1432
1333	coro_destroy (aTHX_ coro);	1433	coro_destruct (aTHX_ coro);
1334		1434
1335	load_perl (aTHX_ &temp);	1435	load_perl (aTHX_ &temp);
1336		1436
1337	coro->slot = 0;	1437	coro->slot = 0;
1338	}	1438	}
…		…
1384	# define MGf_DUP 0	1484	# define MGf_DUP 0
1385	#endif	1485	#endif
1386	};	1486	};
1387		1487
1388	static void	1488	static void
1389	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)	1489	prepare_transfer (pTHX_ struct coro_transfer_args ta, SV prev_sv, SV *next_sv)
1390	{	1490	{
1391	ta->prev = SvSTATE (prev_sv);	1491	ta->prev = SvSTATE (prev_sv);
1392	ta->next = SvSTATE (next_sv);	1492	ta->next = SvSTATE (next_sv);
1393	TRANSFER_CHECK (*ta);	1493	TRANSFER_CHECK (*ta);
1394	}	1494	}
1395		1495
1396	static void	1496	static void
1397	api_transfer (SV prev_sv, SV next_sv)	1497	api_transfer (pTHX_ SV prev_sv, SV next_sv)
1398	{	1498	{
1399	dTHX;
1400	struct transfer_args ta;	1499	struct coro_transfer_args ta;
1401		1500
1402	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1501	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1403	TRANSFER (ta, 1);	1502	TRANSFER (ta, 1);
1404	}	1503	}
1405		1504
…		…
1422		1521
1423	return 0;	1522	return 0;
1424	}	1523	}
1425		1524
1426	static int	1525	static int
1427	api_ready (SV *coro_sv)	1526	api_ready (pTHX_ SV *coro_sv)
1428	{	1527	{
1429	dTHX;
1430	struct coro *coro;	1528	struct coro *coro;
1431	SV *sv_hook;	1529	SV *sv_hook;
1432	void (*xs_hook)(void);	1530	void (*xs_hook)(void);
1433		1531
1434	if (SvROK (coro_sv))	1532	if (SvROK (coro_sv))
…		…
1444	LOCK;	1542	LOCK;
1445		1543
1446	sv_hook = coro_nready ? 0 : coro_readyhook;	1544	sv_hook = coro_nready ? 0 : coro_readyhook;
1447	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1545	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1448		1546
1449	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));	1547	coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1450	++coro_nready;	1548	++coro_nready;
1451		1549
1452	UNLOCK;	1550	UNLOCK;
1453		1551
1454	if (sv_hook)	1552	if (sv_hook)
…		…
1472		1570
1473	return 1;	1571	return 1;
1474	}	1572	}
1475		1573
1476	static int	1574	static int
1477	api_is_ready (SV *coro_sv)	1575	api_is_ready (pTHX_ SV *coro_sv)
1478	{	1576	{
1479	dTHX;
1480	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1577	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1481	}	1578	}
1482		1579
1483	static void	1580	INLINE void
1484	prepare_schedule (pTHX_ struct transfer_args *ta)	1581	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1485	{	1582	{
1486	SV prev_sv, next_sv;	1583	SV prev_sv, next_sv;
1487		1584
1488	for (;;)	1585	for (;;)
1489	{	1586	{
…		…
1514	/* cannot transfer to destroyed coros, skip and look for next */	1611	/* cannot transfer to destroyed coros, skip and look for next */
1515	if (expect_false (ta->next->flags & CF_DESTROYED))	1612	if (expect_false (ta->next->flags & CF_DESTROYED))
1516	{	1613	{
1517	UNLOCK;	1614	UNLOCK;
1518	SvREFCNT_dec (next_sv);	1615	SvREFCNT_dec (next_sv);
1519	/* coro_nready is already taken care of by destroy */	1616	/* coro_nready has already been taken care of by destroy */
1520	continue;	1617	continue;
1521	}	1618	}
1522		1619
1523	--coro_nready;	1620	--coro_nready;
1524	UNLOCK;	1621	UNLOCK;
…		…
1527		1624
1528	/* free this only after the transfer */	1625	/* free this only after the transfer */
1529	prev_sv = SvRV (coro_current);	1626	prev_sv = SvRV (coro_current);
1530	ta->prev = SvSTATE (prev_sv);	1627	ta->prev = SvSTATE (prev_sv);
1531	TRANSFER_CHECK (*ta);	1628	TRANSFER_CHECK (*ta);
1532	assert (ta->next->flags & CF_READY);	1629	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1533	ta->next->flags &= ~CF_READY;	1630	ta->next->flags &= ~CF_READY;
1534	SvRV_set (coro_current, next_sv);	1631	SvRV_set (coro_current, next_sv);
1535		1632
1536	LOCK;	1633	LOCK;
1537	free_coro_mortal (aTHX);	1634	free_coro_mortal (aTHX);
1538	coro_mortal = prev_sv;	1635	coro_mortal = prev_sv;
1539	UNLOCK;	1636	UNLOCK;
1540	}	1637	}
1541		1638
1542	static void	1639	INLINE void
1543	prepare_cede (pTHX_ struct transfer_args *ta)	1640	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1544	{	1641	{
1545	api_ready (coro_current);	1642	api_ready (aTHX_ coro_current);
1546	prepare_schedule (aTHX_ ta);	1643	prepare_schedule (aTHX_ ta);
1547	}	1644	}
1548		1645
		1646	INLINE void
		1647	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1648	{
		1649	SV *prev = SvRV (coro_current);
		1650
		1651	if (coro_nready)
		1652	{
		1653	prepare_schedule (aTHX_ ta);
		1654	api_ready (aTHX_ prev);
		1655	}
		1656	else
		1657	prepare_nop (aTHX_ ta);
		1658	}
		1659
		1660	static void
		1661	api_schedule (pTHX)
		1662	{
		1663	struct coro_transfer_args ta;
		1664
		1665	prepare_schedule (aTHX_ &ta);
		1666	TRANSFER (ta, 1);
		1667	}
		1668
1549	static int	1669	static int
1550	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1670	api_cede (pTHX)
1551	{	1671	{
1552	if (coro_nready)	1672	struct coro_transfer_args ta;
1553	{	1673
1554	SV *prev = SvRV (coro_current);
1555	prepare_schedule (aTHX_ ta);	1674	prepare_cede (aTHX_ &ta);
1556	api_ready (prev);	1675
		1676	if (expect_true (ta.prev != ta.next))
		1677	{
		1678	TRANSFER (ta, 1);
1557	return 1;	1679	return 1;
1558	}	1680	}
1559	else	1681	else
1560	return 0;	1682	return 0;
1561	}	1683	}
1562		1684
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	1685	static int
1574	api_cede (void)	1686	api_cede_notself (pTHX)
1575	{	1687	{
1576	dTHX;	1688	if (coro_nready)
		1689	{
1577	struct transfer_args ta;	1690	struct coro_transfer_args ta;
1578		1691
1579	prepare_cede (aTHX_ &ta);	1692	prepare_cede_notself (aTHX_ &ta);
1580
1581	if (expect_true (ta.prev != ta.next))
1582	{
1583	TRANSFER (ta, 1);	1693	TRANSFER (ta, 1);
1584	return 1;	1694	return 1;
1585	}	1695	}
1586	else	1696	else
1587	return 0;	1697	return 0;
1588	}	1698	}
1589		1699
1590	static int	1700	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)	1701	api_trace (pTHX_ SV *coro_sv, int flags)
1607	{	1702	{
1608	dTHX;
1609	struct coro *coro = SvSTATE (coro_sv);	1703	struct coro *coro = SvSTATE (coro_sv);
1610		1704
1611	if (flags & CC_TRACE)	1705	if (flags & CC_TRACE)
1612	{	1706	{
1613	if (!coro->cctx)	1707	if (!coro->cctx)
1614	coro->cctx = cctx_new ();	1708	coro->cctx = cctx_new_run ();
1615	else if (!(coro->cctx->flags & CC_TRACE))	1709	else if (!(coro->cctx->flags & CC_TRACE))
1616	croak ("cannot enable tracing on coroutine with custom stack");	1710	croak ("cannot enable tracing on coroutine with custom stack,");
1617		1711
1618	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));	1712	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
1619	}	1713	}
1620	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1714	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1621	{	1715	{
…		…
1626	else	1720	else
1627	coro->slot->runops = RUNOPS_DEFAULT;	1721	coro->slot->runops = RUNOPS_DEFAULT;
1628	}	1722	}
1629	}	1723	}
1630		1724
		1725	/*****************************************************************************/
		1726	/* PerlIO::cede */
		1727
		1728	typedef struct
		1729	{
		1730	PerlIOBuf base;
		1731	NV next, every;
		1732	} PerlIOCede;
		1733
		1734	static IV
		1735	PerlIOCede_pushed (pTHX_ PerlIO f, const char mode, SV arg, PerlIO_funcs tab)
		1736	{
		1737	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1738
		1739	self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
		1740	self->next = nvtime () + self->every;
		1741
		1742	return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
		1743	}
		1744
		1745	static SV *
		1746	PerlIOCede_getarg (pTHX_ PerlIO f, CLONE_PARAMS param, int flags)
		1747	{
		1748	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1749
		1750	return newSVnv (self->every);
		1751	}
		1752
		1753	static IV
		1754	PerlIOCede_flush (pTHX_ PerlIO *f)
		1755	{
		1756	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1757	double now = nvtime ();
		1758
		1759	if (now >= self->next)
		1760	{
		1761	api_cede (aTHX);
		1762	self->next = now + self->every;
		1763	}
		1764
		1765	return PerlIOBuf_flush (aTHX_ f);
		1766	}
		1767
		1768	static PerlIO_funcs PerlIO_cede =
		1769	{
		1770	sizeof(PerlIO_funcs),
		1771	"cede",
		1772	sizeof(PerlIOCede),
		1773	PERLIO_K_DESTRUCT \| PERLIO_K_RAW,
		1774	PerlIOCede_pushed,
		1775	PerlIOBuf_popped,
		1776	PerlIOBuf_open,
		1777	PerlIOBase_binmode,
		1778	PerlIOCede_getarg,
		1779	PerlIOBase_fileno,
		1780	PerlIOBuf_dup,
		1781	PerlIOBuf_read,
		1782	PerlIOBuf_unread,
		1783	PerlIOBuf_write,
		1784	PerlIOBuf_seek,
		1785	PerlIOBuf_tell,
		1786	PerlIOBuf_close,
		1787	PerlIOCede_flush,
		1788	PerlIOBuf_fill,
		1789	PerlIOBase_eof,
		1790	PerlIOBase_error,
		1791	PerlIOBase_clearerr,
		1792	PerlIOBase_setlinebuf,
		1793	PerlIOBuf_get_base,
		1794	PerlIOBuf_bufsiz,
		1795	PerlIOBuf_get_ptr,
		1796	PerlIOBuf_get_cnt,
		1797	PerlIOBuf_set_ptrcnt,
		1798	};
		1799
		1800	/*****************************************************************************/
		1801
		1802	static const CV slf_cv; / for quick consistency check */
		1803
		1804	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1805	static SV *slf_arg0;
		1806	static SV *slf_arg1;
		1807	static SV *slf_arg2;
		1808
		1809	/* this restores the stack in the case we patched the entersub, to */
		1810	/* recreate the stack frame as perl will on following calls */
		1811	/* since entersub cleared the stack */
		1812	static OP *
		1813	pp_restore (pTHX)
		1814	{
		1815	dSP;
		1816
		1817	PUSHMARK (SP);
		1818
		1819	EXTEND (SP, 3);
		1820	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1821	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1822	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1823	PUSHs ((SV *)CvGV (slf_cv));
		1824
		1825	RETURNOP (slf_restore.op_first);
		1826	}
		1827
		1828	static void
		1829	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1830	{
		1831	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1832	}
		1833
		1834	static void
		1835	slf_init_set_stacklevel (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1836	{
		1837	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1838
		1839	frame->prepare = slf_prepare_set_stacklevel;
		1840	frame->check = slf_check_nop;
		1841	frame->data = (void *)SvIV (arg [0]);
		1842	}
		1843
		1844	static void
		1845	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1846	{
		1847	SV arg = (SV )slf_frame.data;
		1848
		1849	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1850	}
		1851
		1852	static void
		1853	slf_init_transfer (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1854	{
		1855	if (items != 2)
		1856	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1857
		1858	frame->prepare = slf_prepare_transfer;
		1859	frame->check = slf_check_nop;
		1860	frame->data = (void )arg; / let's hope it will stay valid */
		1861	}
		1862
		1863	static void
		1864	slf_init_schedule (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1865	{
		1866	frame->prepare = prepare_schedule;
		1867	frame->check = slf_check_nop;
		1868	}
		1869
		1870	static void
		1871	slf_init_cede (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1872	{
		1873	frame->prepare = prepare_cede;
		1874	frame->check = slf_check_nop;
		1875	}
		1876
		1877	static void
		1878	slf_init_cede_notself (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		1879	{
		1880	frame->prepare = prepare_cede_notself;
		1881	frame->check = slf_check_nop;
		1882	}
		1883
		1884	/* we hijack an hopefully unused CV flag for our purposes */
		1885	#define CVf_SLF 0x4000
		1886
		1887	/*
		1888	* these not obviously related functions are all rolled into one
		1889	* function to increase chances that they all will call transfer with the same
		1890	* stack offset
		1891	* SLF stands for "schedule-like-function".
		1892	*/
		1893	static OP *
		1894	pp_slf (pTHX)
		1895	{
		1896	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1897
		1898	/* set up the slf frame, unless it has already been set-up */
		1899	/* the latter happens when a new coro has been started */
		1900	/* or when a new cctx was attached to an existing coroutine */
		1901	if (expect_true (!slf_frame.prepare))
		1902	{
		1903	/* first iteration */
		1904	dSP;
		1905	SV **arg = PL_stack_base + TOPMARK + 1;
		1906	int items = SP - arg; /* args without function object */
		1907	SV gv = sp;
		1908
		1909	/* do a quick consistency check on the "function" object, and if it isn't */
		1910	/* for us, divert to the real entersub */
		1911	if (SvTYPE (gv) != SVt_PVGV \|\| !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1912	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1913
		1914	/* pop args */
		1915	SP = PL_stack_base + POPMARK;
		1916
		1917	if (!(PL_op->op_flags & OPf_STACKED))
		1918	{
		1919	/* ampersand-form of call, use @_ instead of stack */
		1920	AV *av = GvAV (PL_defgv);
		1921	arg = AvARRAY (av);
		1922	items = AvFILLp (av) + 1;
		1923	}
		1924
		1925	PUTBACK;
		1926
		1927	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, GvCV (gv), arg, items);
		1928	}
		1929
		1930	/* now interpret the slf_frame */
		1931	/* we use a callback system not to make the code needlessly */
		1932	/* complicated, but so we can run multiple perl coros from one cctx */
		1933
		1934	do
		1935	{
		1936	struct coro_transfer_args ta;
		1937
		1938	slf_frame.prepare (aTHX_ &ta);
		1939	TRANSFER (ta, 0);
		1940
		1941	checkmark = PL_stack_sp - PL_stack_base;
		1942	}
		1943	while (slf_frame.check (aTHX_ &slf_frame));
		1944
		1945	{
		1946	dSP;
		1947	SV **bot = PL_stack_base + checkmark;
		1948	int gimme = GIMME_V;
		1949
		1950	slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
		1951
		1952	/* make sure we put something on the stack in scalar context */
		1953	if (gimme == G_SCALAR)
		1954	{
		1955	if (sp == bot)
		1956	XPUSHs (&PL_sv_undef);
		1957
		1958	SP = bot + 1;
		1959	}
		1960
		1961	PUTBACK;
		1962	}
		1963
		1964	return NORMAL;
		1965	}
		1966
		1967	static void
		1968	api_execute_slf (pTHX_ CV cv, coro_slf_cb init_cb, SV *arg, int items)
		1969	{
		1970	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1971
		1972	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1973	&& PL_op->op_ppaddr != pp_slf)
		1974	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1975
		1976	if (items > 3)
		1977	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
		1978
		1979	CvFLAGS (cv) \|= CVf_SLF;
		1980	CvXSUBANY (cv).any_ptr = (void *)init_cb;
		1981	slf_cv = cv;
		1982
		1983	/* we patch the op, and then re-run the whole call */
		1984	/* we have to put the same argument on the stack for this to work */
		1985	/* and this will be done by pp_restore */
		1986	slf_restore.op_next = (OP *)&slf_restore;
		1987	slf_restore.op_type = OP_NULL;
		1988	slf_restore.op_ppaddr = pp_restore;
		1989	slf_restore.op_first = PL_op;
		1990
		1991	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		1992	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		1993	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
		1994
		1995	PL_op->op_ppaddr = pp_slf;
		1996
		1997	PL_op = (OP *)&slf_restore;
		1998	}
		1999
		2000	/*****************************************************************************/
		2001
1631	static int	2002	static int
1632	coro_gensub_free (pTHX_ SV sv, MAGIC mg)	2003	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
1633	{	2004	{
1634	AV *padlist;	2005	AV av = (AV )frame->data;
1635	AV av = (AV )mg->mg_obj;	2006	SV *count_sv = AvARRAY (av)[0];
1636		2007
1637	abort ();	2008	if (SvIVX (count_sv) > 0)
1638		2009	{
		2010	SvIVX (count_sv) = SvIVX (count_sv) - 1;
1639	return 0;	2011	return 0;
1640	}	2012	}
		2013	else
		2014	{
		2015	int i;
		2016	/* if we were woken up but can't down, we look through the whole */
		2017	/* waiters list and only add us if we aren't in there already */
		2018	/* this avoids some degenerate memory usage cases */
1641		2019
1642	static MGVTBL coro_gensub_vtbl = {	2020	for (i = 1; i <= AvFILLp (av); ++i)
1643	0, 0, 0, 0,	2021	if (AvARRAY (av)[i] == SvRV (coro_current))
1644	coro_gensub_free	2022	return 1;
1645	};	2023
		2024	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2025	return 1;
		2026	}
		2027	}
		2028
		2029	static void
		2030	slf_init_semaphore_down (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
		2031	{
		2032	AV av = (AV )SvRV (arg [0]);
		2033
		2034	if (SvIVX (AvARRAY (av)[0]) > 0)
		2035	{
		2036	frame->data = (void *)av;
		2037	frame->prepare = prepare_nop;
		2038	}
		2039	else
		2040	{
		2041	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2042
		2043	frame->data = (void )sv_2mortal (SvREFCNT_inc ((SV )av));
		2044	frame->prepare = prepare_schedule;
		2045	}
		2046
		2047	frame->check = slf_check_semaphore_down;
		2048
		2049	}
		2050
		2051	/*****************************************************************************/
		2052
		2053	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2054
		2055	/* create a closure from XS, returns a code reference */
		2056	/* the arg can be accessed via GENSUB_ARG from the callback */
		2057	/* the callback must use dXSARGS/XSRETURN */
		2058	static SV *
		2059	gensub (pTHX_ void (xsub)(pTHX_ CV ), void *arg)
		2060	{
		2061	CV cv = (CV )NEWSV (0, 0);
		2062
		2063	sv_upgrade ((SV *)cv, SVt_PVCV);
		2064
		2065	CvANON_on (cv);
		2066	CvISXSUB_on (cv);
		2067	CvXSUB (cv) = xsub;
		2068	GENSUB_ARG = arg;
		2069
		2070	return newRV_noinc ((SV *)cv);
		2071	}
		2072
		2073	/*****************************************************************************/
1646		2074
1647	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2075	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1648		2076
1649	PROTOTYPES: DISABLE	2077	PROTOTYPES: DISABLE
1650		2078
1651	BOOT:	2079	BOOT:
1652	{	2080	{
1653	#ifdef USE_ITHREADS	2081	#ifdef USE_ITHREADS
1654	MUTEX_INIT (&coro_mutex);	2082	MUTEX_INIT (&coro_lock);
		2083	# if CORO_PTHREAD
		2084	coro_thx = PERL_GET_CONTEXT;
		2085	# endif
1655	#endif	2086	#endif
1656	BOOT_PAGESIZE;	2087	BOOT_PAGESIZE;
1657		2088
1658	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);	2089	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
1659	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);	2090	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
…		…
1677	main_top_env = PL_top_env;	2108	main_top_env = PL_top_env;
1678		2109
1679	while (main_top_env->je_prev)	2110	while (main_top_env->je_prev)
1680	main_top_env = main_top_env->je_prev;	2111	main_top_env = main_top_env->je_prev;
1681		2112
1682	coroapi.ver = CORO_API_VERSION;	2113	coroapi.ver = CORO_API_VERSION;
1683	coroapi.rev = CORO_API_REVISION;	2114	coroapi.rev = CORO_API_REVISION;
		2115
1684	coroapi.transfer = api_transfer;	2116	coroapi.transfer = api_transfer;
		2117
		2118	coroapi.sv_state = SvSTATE_;
		2119	coroapi.execute_slf = api_execute_slf;
		2120	coroapi.prepare_nop = prepare_nop;
		2121	coroapi.prepare_schedule = prepare_schedule;
		2122	coroapi.prepare_cede = prepare_cede;
		2123	coroapi.prepare_cede_notself = prepare_cede_notself;
		2124
		2125	{
		2126	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
		2127
		2128	if (!svp) croak ("Time::HiRes is required");
		2129	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
		2130
		2131	nvtime = INT2PTR (double ()(), SvIV (svp));
		2132	}
1685		2133
1686	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	2134	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1687	}	2135	}
1688		2136
1689	SV *	2137	SV *
…		…
1713	av_push (coro->args, newSVsv (ST (i)));	2161	av_push (coro->args, newSVsv (ST (i)));
1714	}	2162	}
1715	OUTPUT:	2163	OUTPUT:
1716	RETVAL	2164	RETVAL
1717		2165
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	2166	void
1722	_set_stacklevel (...)	2167	_set_stacklevel (...)
1723	ALIAS:	2168	CODE:
1724	Coro::State::transfer = 1	2169	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		2170
1732	PUTBACK;	2171	void
1733	switch (ix)	2172	transfer (...)
1734	{	2173	PROTOTYPE: $$
1735	case 0:	2174	CODE:
1736	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	2175	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		2176
1770	bool	2177	bool
1771	_destroy (SV *coro_sv)	2178	_destroy (SV *coro_sv)
1772	CODE:	2179	CODE:
1773	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2180	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1780	CODE:	2187	CODE:
1781	_exit (code);	2188	_exit (code);
1782		2189
1783	int	2190	int
1784	cctx_stacksize (int new_stacksize = 0)	2191	cctx_stacksize (int new_stacksize = 0)
		2192	PROTOTYPE: ;$
1785	CODE:	2193	CODE:
1786	RETVAL = coro_stacksize;	2194	RETVAL = cctx_stacksize;
1787	if (new_stacksize)	2195	if (new_stacksize)
		2196	{
1788	coro_stacksize = new_stacksize;	2197	cctx_stacksize = new_stacksize;
		2198	++cctx_gen;
		2199	}
1789	OUTPUT:	2200	OUTPUT:
1790	RETVAL	2201	RETVAL
1791		2202
1792	int	2203	int
		2204	cctx_max_idle (int max_idle = 0)
		2205	PROTOTYPE: ;$
		2206	CODE:
		2207	RETVAL = cctx_max_idle;
		2208	if (max_idle > 1)
		2209	cctx_max_idle = max_idle;
		2210	OUTPUT:
		2211	RETVAL
		2212
		2213	int
1793	cctx_count ()	2214	cctx_count ()
		2215	PROTOTYPE:
1794	CODE:	2216	CODE:
1795	RETVAL = cctx_count;	2217	RETVAL = cctx_count;
1796	OUTPUT:	2218	OUTPUT:
1797	RETVAL	2219	RETVAL
1798		2220
1799	int	2221	int
1800	cctx_idle ()	2222	cctx_idle ()
		2223	PROTOTYPE:
1801	CODE:	2224	CODE:
1802	RETVAL = cctx_idle;	2225	RETVAL = cctx_idle;
1803	OUTPUT:	2226	OUTPUT:
1804	RETVAL	2227	RETVAL
1805		2228
1806	void	2229	void
1807	list ()	2230	list ()
		2231	PROTOTYPE:
1808	PPCODE:	2232	PPCODE:
1809	{	2233	{
1810	struct coro *coro;	2234	struct coro *coro;
1811	for (coro = coro_first; coro; coro = coro->next)	2235	for (coro = coro_first; coro; coro = coro->next)
1812	if (coro->hv)	2236	if (coro->hv)
…		…
1817	call (Coro::State coro, SV *coderef)	2241	call (Coro::State coro, SV *coderef)
1818	ALIAS:	2242	ALIAS:
1819	eval = 1	2243	eval = 1
1820	CODE:	2244	CODE:
1821	{	2245	{
1822	if (coro->mainstack)	2246	if (coro->mainstack && ((coro->flags & CF_RUNNING) \|\| coro->slot))
1823	{	2247	{
1824	struct coro temp;	2248	struct coro temp;
1825		2249
1826	if (!(coro->flags & CF_RUNNING))	2250	if (!(coro->flags & CF_RUNNING))
1827	{	2251	{
…		…
1871	RETVAL = boolSV (coro->flags & ix);	2295	RETVAL = boolSV (coro->flags & ix);
1872	OUTPUT:	2296	OUTPUT:
1873	RETVAL	2297	RETVAL
1874		2298
1875	void	2299	void
		2300	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2301	PROTOTYPE: $;$
		2302	CODE:
		2303	SvREFCNT_dec (self->throw);
		2304	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2305
		2306	void
1876	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)	2307	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		2308	PROTOTYPE: $;$
		2309	C_ARGS: aTHX_ coro, flags
1877		2310
1878	SV *	2311	SV *
1879	has_cctx (Coro::State coro)	2312	has_cctx (Coro::State coro)
1880	PROTOTYPE: $	2313	PROTOTYPE: $
1881	CODE:	2314	CODE:
…		…
1889	CODE:	2322	CODE:
1890	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2323	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1891	OUTPUT:	2324	OUTPUT:
1892	RETVAL	2325	RETVAL
1893		2326
1894	IV	2327	UV
1895	rss (Coro::State coro)	2328	rss (Coro::State coro)
1896	PROTOTYPE: $	2329	PROTOTYPE: $
1897	ALIAS:	2330	ALIAS:
1898	usecount = 1	2331	usecount = 1
1899	CODE:	2332	CODE:
…		…
1905	OUTPUT:	2338	OUTPUT:
1906	RETVAL	2339	RETVAL
1907		2340
1908	void	2341	void
1909	force_cctx ()	2342	force_cctx ()
		2343	PROTOTYPE:
1910	CODE:	2344	CODE:
1911	struct coro *coro = SvSTATE (coro_current);	2345	struct coro *coro = SvSTATE (coro_current);
1912	coro->cctx->idle_sp = 0;	2346	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		2347
1921	void	2348	void
1922	swap_defsv (Coro::State self)	2349	swap_defsv (Coro::State self)
1923	PROTOTYPE: $	2350	PROTOTYPE: $
1924	ALIAS:	2351	ALIAS:
1925	swap_defav = 1	2352	swap_defav = 1
1926	CODE:	2353	CODE:
1927	if (!self->slot)	2354	if (!self->slot)
1928	croak ("cannot swap state with coroutine that has no saved state");	2355	croak ("cannot swap state with coroutine that has no saved state,");
1929	else	2356	else
1930	{	2357	{
1931	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);	2358	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
1932	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;	2359	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
1933		2360
…		…
1958		2385
1959	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2386	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1960	coro_ready[i] = newAV ();	2387	coro_ready[i] = newAV ();
1961		2388
1962	{	2389	{
1963	SV *sv = perl_get_sv ("Coro::API", TRUE);	2390	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1964	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1965		2391
1966	coroapi.schedule = api_schedule;	2392	coroapi.schedule = api_schedule;
1967	coroapi.cede = api_cede;	2393	coroapi.cede = api_cede;
1968	coroapi.cede_notself = api_cede_notself;	2394	coroapi.cede_notself = api_cede_notself;
1969	coroapi.ready = api_ready;	2395	coroapi.ready = api_ready;
1970	coroapi.is_ready = api_is_ready;	2396	coroapi.is_ready = api_is_ready;
1971	coroapi.nready = &coro_nready;	2397	coroapi.nready = coro_nready;
1972	coroapi.current = coro_current;	2398	coroapi.current = coro_current;
1973		2399
1974	GCoroAPI = &coroapi;	2400	GCoroAPI = &coroapi;
1975	sv_setiv (sv, (IV)&coroapi);	2401	sv_setiv (sv, (IV)&coroapi);
1976	SvREADONLY_on (sv);	2402	SvREADONLY_on (sv);
1977	}	2403	}
1978	}	2404	}
		2405
		2406	void
		2407	schedule (...)
		2408	CODE:
		2409	api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
		2410
		2411	void
		2412	cede (...)
		2413	CODE:
		2414	api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
		2415
		2416	void
		2417	cede_notself (...)
		2418	CODE:
		2419	api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
1979		2420
1980	void	2421	void
1981	_set_current (SV *current)	2422	_set_current (SV *current)
1982	PROTOTYPE: $	2423	PROTOTYPE: $
1983	CODE:	2424	CODE:
1984	SvREFCNT_dec (SvRV (coro_current));	2425	SvREFCNT_dec (SvRV (coro_current));
1985	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	2426	SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1986		2427
1987	void	2428	void
1988	_set_readyhook (SV *hook)	2429	_set_readyhook (SV *hook)
1989	PROTOTYPE: $	2430	PROTOTYPE: $
1990	CODE:	2431	CODE:
…		…
1993	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2434	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1994	UNLOCK;	2435	UNLOCK;
1995		2436
1996	int	2437	int
1997	prio (Coro::State coro, int newprio = 0)	2438	prio (Coro::State coro, int newprio = 0)
		2439	PROTOTYPE: $;$
1998	ALIAS:	2440	ALIAS:
1999	nice = 1	2441	nice = 1
2000	CODE:	2442	CODE:
2001	{	2443	{
2002	RETVAL = coro->prio;	2444	RETVAL = coro->prio;
…		…
2017		2459
2018	SV *	2460	SV *
2019	ready (SV *self)	2461	ready (SV *self)
2020	PROTOTYPE: $	2462	PROTOTYPE: $
2021	CODE:	2463	CODE:
2022	RETVAL = boolSV (api_ready (self));	2464	RETVAL = boolSV (api_ready (aTHX_ self));
2023	OUTPUT:	2465	OUTPUT:
2024	RETVAL	2466	RETVAL
2025		2467
2026	int	2468	int
2027	nready (...)	2469	nready (...)
…		…
2050	SvREFCNT_dec (old);	2492	SvREFCNT_dec (old);
2051	croak ("\3async_pool terminate\2\n");	2493	croak ("\3async_pool terminate\2\n");
2052	}	2494	}
2053		2495
2054	SvREFCNT_dec (coro->saved_deffh);	2496	SvREFCNT_dec (coro->saved_deffh);
2055	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);	2497	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2056		2498
2057	hv_store (hv, "desc", sizeof ("desc") - 1,	2499	hv_store (hv, "desc", sizeof ("desc") - 1,
2058	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);	2500	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2059		2501
2060	invoke_av = (AV *)SvRV (invoke);	2502	invoke_av = (AV *)SvRV (invoke);
…		…
2064		2506
2065	if (len > 0)	2507	if (len > 0)
2066	{	2508	{
2067	av_fill (defav, len - 1);	2509	av_fill (defav, len - 1);
2068	for (i = 0; i < len; ++i)	2510	for (i = 0; i < len; ++i)
2069	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));	2511	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2070	}	2512	}
2071
2072	SvREFCNT_dec (invoke);
2073	}	2513	}
2074		2514
2075	void	2515	void
2076	_pool_2 (SV *cb)	2516	_pool_2 (SV *cb)
2077	CODE:	2517	CODE:
…		…
2081	sv_setsv (cb, &PL_sv_undef);	2521	sv_setsv (cb, &PL_sv_undef);
2082		2522
2083	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;	2523	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
2084	coro->saved_deffh = 0;	2524	coro->saved_deffh = 0;
2085		2525
2086	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2526	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2087	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2527	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2088	{	2528	{
2089	SV *old = PL_diehook;	2529	SV *old = PL_diehook;
2090	PL_diehook = 0;	2530	PL_diehook = 0;
2091	SvREFCNT_dec (old);	2531	SvREFCNT_dec (old);
…		…
2097	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2537	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2098		2538
2099	coro->prio = 0;	2539	coro->prio = 0;
2100		2540
2101	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2541	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2102	api_trace (coro_current, 0);	2542	api_trace (aTHX_ coro_current, 0);
2103		2543
2104	av_push (av_async_pool, newSVsv (coro_current));	2544	av_push (av_async_pool, newSVsv (coro_current));
2105	}	2545	}
2106		2546
2107	#if 0	2547
		2548	MODULE = Coro::State PACKAGE = Coro::AIO
2108		2549
2109	void	2550	void
2110	_generator_call (...)	2551	_get_state (SV *self)
2111	PROTOTYPE: @	2552	PROTOTYPE: $
2112	PPCODE:	2553	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	{	2554	{
2122	struct coro *coro;	2555	AV *defav = GvAV (PL_defgv);
2123	MAGIC *mg;	2556	AV *av = newAV ();
2124	CV *xcv;
2125	CV ncv = (CV )newSV_type (SVt_PVCV);
2126	int i;	2557	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));	2558	SV *data_sv = newSV (sizeof (struct io_state));
2165	data = (struct io_state *)SvPVX (RETVAL);	2559	struct io_state data = (struct io_state )SvPVX (data_sv);
2166	SvCUR_set (RETVAL, sizeof (struct io_state));	2560	SvCUR_set (data_sv, sizeof (struct io_state));
2167	SvPOK_only (RETVAL);	2561	SvPOK_only (data_sv);
2168		2562
2169	data->errorno = errno;	2563	data->errorno = errno;
2170	data->laststype = PL_laststype;	2564	data->laststype = PL_laststype;
2171	data->laststatval = PL_laststatval;	2565	data->laststatval = PL_laststatval;
2172	data->statcache = PL_statcache;	2566	data->statcache = PL_statcache;
		2567
		2568	av_extend (av, AvFILLp (defav) + 1 + 1);
		2569
		2570	for (i = 0; i <= AvFILLp (defav); ++i)
		2571	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
		2572
		2573	av_push (av, data_sv);
		2574
		2575	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		2576
		2577	api_ready (aTHX_ self);
2173	}	2578	}
2174	OUTPUT:
2175	RETVAL
2176		2579
2177	void	2580	void
2178	_set_state (char *data_)	2581	_set_state (SV *state)
2179	PROTOTYPE: $	2582	PROTOTYPE: $
2180	CODE:	2583	PPCODE:
2181	{	2584	{
2182	struct io_state data = (void )data_;	2585	AV av = (AV )SvRV (state);
		2586	struct io_state data = (struct io_state )SvPVX (AvARRAY (av)[AvFILLp (av)]);
		2587	int i;
2183		2588
2184	errno = data->errorno;	2589	errno = data->errorno;
2185	PL_laststype = data->laststype;	2590	PL_laststype = data->laststype;
2186	PL_laststatval = data->laststatval;	2591	PL_laststatval = data->laststatval;
2187	PL_statcache = data->statcache;	2592	PL_statcache = data->statcache;
		2593
		2594	EXTEND (SP, AvFILLp (av));
		2595	for (i = 0; i < AvFILLp (av); ++i)
		2596	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2188	}	2597	}
2189		2598
2190		2599
2191	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2600	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2192		2601
2193	BOOT:	2602	BOOT:
2194	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2603	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2195		2604
2196	SV *	2605	void
2197	_schedule (...)	2606	_schedule (...)
2198	PROTOTYPE: @
2199	CODE:	2607	CODE:
2200	{	2608	{
2201	static int incede;	2609	static int incede;
2202		2610
2203	api_cede_notself ();	2611	api_cede_notself (aTHX);
2204		2612
2205	++incede;	2613	++incede;
2206	while (coro_nready >= incede && api_cede ())	2614	while (coro_nready >= incede && api_cede (aTHX))
2207	;	2615	;
2208		2616
2209	sv_setsv (sv_activity, &PL_sv_undef);	2617	sv_setsv (sv_activity, &PL_sv_undef);
2210	if (coro_nready >= incede)	2618	if (coro_nready >= incede)
2211	{	2619	{
…		…
2216	}	2624	}
2217		2625
2218	--incede;	2626	--incede;
2219	}	2627	}
2220		2628
		2629
		2630	MODULE = Coro::State PACKAGE = PerlIO::cede
		2631
		2632	BOOT:
		2633	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2634
		2635	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2636
		2637	SV *
		2638	new (SV klass, SV count_ = 0)
		2639	CODE:
		2640	{
		2641	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2642	AV *av = newAV ();
		2643	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2644	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2645	}
		2646	OUTPUT:
		2647	RETVAL
		2648
		2649	SV *
		2650	count (SV *self)
		2651	CODE:
		2652	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2653	OUTPUT:
		2654	RETVAL
		2655
		2656	void
		2657	up (SV *self, int adjust = 1)
		2658	ALIAS:
		2659	adjust = 1
		2660	CODE:
		2661	{
		2662	AV av = (AV )SvRV (self);
		2663	SV *count_sv = AvARRAY (av)[0];
		2664	IV count = SvIVX (count_sv);
		2665
		2666	count += ix ? adjust : 1;
		2667	SvIVX (count_sv) = count;
		2668
		2669	/* now wake up as many waiters as possible */
		2670	while (count > 0 && AvFILLp (av) >= count)
		2671	{
		2672	SV *cb;
		2673
		2674	/* swap first two elements so we can shift a waiter */
		2675	AvARRAY (av)[0] = AvARRAY (av)[1];
		2676	AvARRAY (av)[1] = count_sv;
		2677	cb = av_shift (av);
		2678
		2679	if (SvOBJECT (cb))
		2680	api_ready (aTHX_ cb);
		2681	else
		2682	croak ("callbacks not yet supported");
		2683
		2684	SvREFCNT_dec (cb);
		2685	}
		2686	}
		2687
		2688	void
		2689	down (SV *self)
		2690	CODE:
		2691	api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
		2692
		2693	void
		2694	try (SV *self)
		2695	PPCODE:
		2696	{
		2697	AV av = (AV )SvRV (self);
		2698	SV *count_sv = AvARRAY (av)[0];
		2699	IV count = SvIVX (count_sv);
		2700
		2701	if (count > 0)
		2702	{
		2703	--count;
		2704	SvIVX (count_sv) = count;
		2705	XSRETURN_YES;
		2706	}
		2707	else
		2708	XSRETURN_NO;
		2709	}
		2710
		2711	void
		2712	waiters (SV *self)
		2713	CODE:
		2714	{
		2715	AV av = (AV )SvRV (self);
		2716
		2717	if (GIMME_V == G_SCALAR)
		2718	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2719	else
		2720	{
		2721	int i;
		2722	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2723	for (i = 1; i <= AvFILLp (av); ++i)
		2724	PUSHs (newSVsv (AvARRAY (av)[i]));
		2725	}
		2726	}
		2727

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Comparing Coro/Coro/State.xs (file contents): Revision 1.244 by root, Sun Sep 21 18:29:39 2008 UTC vs. Revision 1.279 by root, Sun Nov 16 08:59:16 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.244 by root, Sun Sep 21 18:29:39 2008 UTC vs.
Revision 1.279 by root, Sun Nov 16 08:59:16 2008 UTC