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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.245 by root, Mon Sep 22 05:40:21 2008 UTC vs.
Revision 1.284 by root, Mon Nov 17 01:05:47 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 */
164		171
165	static GV *irsgv; /* $/ */	172	static GV *irsgv; /* $/ */
166	static GV *stdoutgv; /* *STDOUT */	173	static GV *stdoutgv; /* *STDOUT */
167	static SV *rv_diehook;	174	static SV *rv_diehook;
168	static SV *rv_warnhook;	175	static SV *rv_warnhook;
…		…
187	CC_TRACE_LINE = 0x10, /* trace each statement */	194	CC_TRACE_LINE = 0x10, /* trace each statement */
188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,	195	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189	};	196	};
190		197
191	/* this is a structure representing a c-level coroutine */	198	/* this is a structure representing a c-level coroutine */
192	typedef struct coro_cctx {	199	typedef struct coro_cctx
		200	{
193	struct coro_cctx *next;	201	struct coro_cctx *next;
194		202
195	/* the stack */	203	/* the stack */
196	void *sptr;	204	void *sptr;
197	size_t ssize;	205	size_t ssize;
…		…
200	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	208	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 */	209	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202	JMPENV *top_env;	210	JMPENV *top_env;
203	coro_context cctx;	211	coro_context cctx;
204		212
		213	U32 gen;
205	#if CORO_USE_VALGRIND	214	#if CORO_USE_VALGRIND
206	int valgrind_id;	215	int valgrind_id;
207	#endif	216	#endif
208	unsigned char flags;	217	unsigned char flags;
209	} coro_cctx;	218	} coro_cctx;
…		…
214	CF_NEW = 0x0004, /* has never been switched to */	223	CF_NEW = 0x0004, /* has never been switched to */
215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	224	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216	};	225	};
217		226
218	/* the structure where most of the perl state is stored, overlaid on the cxstack */	227	/* the structure where most of the perl state is stored, overlaid on the cxstack */
219	typedef struct {	228	typedef struct
		229	{
220	SV *defsv;	230	SV *defsv;
221	AV *defav;	231	AV *defav;
222	SV *errsv;	232	SV *errsv;
223	SV *irsgv;	233	SV *irsgv;
224	#define VAR(name,type) type name;	234	#define VAR(name,type) type name;
…		…
228		238
229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))	239	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230		240
231	/* this is a structure representing a perl-level coroutine */	241	/* this is a structure representing a perl-level coroutine */
232	struct coro {	242	struct coro {
233	/* the c coroutine allocated to this perl coroutine, if any */	243	/* the C coroutine allocated to this perl coroutine, if any */
234	coro_cctx *cctx;	244	coro_cctx *cctx;
235		245
236	/* process data */	246	/* process data */
		247	struct CoroSLF slf_frame; /* saved slf frame */
237	AV *mainstack;	248	AV *mainstack;
238	perl_slots *slot; /* basically the saved sp */	249	perl_slots *slot; /* basically the saved sp */
239		250
240	AV *args; /* data associated with this coroutine (initial args) */	251	AV *args; /* data associated with this coroutine (initial args) */
241	int refcnt; /* coroutines are refcounted, yes */	252	int refcnt; /* coroutines are refcounted, yes */
242	int flags; /* CF_ flags */	253	int flags; /* CF_ flags */
243	HV *hv; /* the perl hash associated with this coro, if any */	254	HV *hv; /* the perl hash associated with this coro, if any */
		255	void (*on_destroy)(pTHX_ struct coro *coro);
244		256
245	/* statistics */	257	/* statistics */
246	int usecount; /* number of transfers to this coro */	258	int usecount; /* number of transfers to this coro */
247		259
248	/* coro process data */	260	/* coro process data */
…		…
256	struct coro *next, *prev;	268	struct coro *next, *prev;
257	};	269	};
258		270
259	typedef struct coro *Coro__State;	271	typedef struct coro *Coro__State;
260	typedef struct coro *Coro__State_or_hashref;	272	typedef struct coro *Coro__State_or_hashref;
		273
		274	static struct CoroSLF slf_frame; /* the current slf frame */
261		275
262	/** Coro ********************************************************************/	276	/** Coro ********************************************************************/
263		277
264	#define PRIO_MAX 3	278	#define PRIO_MAX 3
265	#define PRIO_HIGH 1	279	#define PRIO_HIGH 1
…		…
269	#define PRIO_MIN -4	283	#define PRIO_MIN -4
270		284
271	/* for Coro.pm */	285	/* for Coro.pm */
272	static SV *coro_current;	286	static SV *coro_current;
273	static SV *coro_readyhook;	287	static SV *coro_readyhook;
274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	288	static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
275	static int coro_nready;
276	static struct coro *coro_first;	289	static struct coro *coro_first;
		290	#define coro_nready coroapi.nready
277		291
278	/** lowlevel stuff **********************************************************/	292	/** lowlevel stuff **********************************************************/
279		293
280	static SV *	294	static SV *
281	coro_get_sv (pTHX_ const char *name, int create)	295	coro_get_sv (pTHX_ const char *name, int create)
…		…
321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	335	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322	#endif	336	#endif
323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	337	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324	--AvFILLp (padlist);	338	--AvFILLp (padlist);
325		339
326	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	340	av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
327	av_store (newpadlist, 1, (SV *)newpad);	341	av_store (newpadlist, 1, (SV *)newpad);
328		342
329	return newpadlist;	343	return newpadlist;
330	}	344	}
331		345
…		…
374	static MGVTBL coro_cv_vtbl = {	388	static MGVTBL coro_cv_vtbl = {
375	0, 0, 0, 0,	389	0, 0, 0, 0,
376	coro_cv_free	390	coro_cv_free
377	};	391	};
378		392
379	#define CORO_MAGIC(sv,type) \	393	#define CORO_MAGIC(sv, type) \
380	SvMAGIC (sv) \	394	expect_true (SvMAGIC (sv)) \
381	? SvMAGIC (sv)->mg_type == type \	395	? expect_true (SvMAGIC (sv)->mg_type == type) \
382	? SvMAGIC (sv) \	396	? SvMAGIC (sv) \
383	: mg_find (sv, type) \	397	: mg_find (sv, type) \
384	: 0	398	: 0
385		399
386	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)	400	#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)	401	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
388		402
389	static struct coro *	403	INLINE struct coro *
390	SvSTATE_ (pTHX_ SV *coro)	404	SvSTATE_ (pTHX_ SV *coro)
391	{	405	{
392	HV *stash;	406	HV *stash;
393	MAGIC *mg;	407	MAGIC *mg;
394		408
…		…
409	mg = CORO_MAGIC_state (coro);	423	mg = CORO_MAGIC_state (coro);
410	return (struct coro *)mg->mg_ptr;	424	return (struct coro *)mg->mg_ptr;
411	}	425	}
412		426
413	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	427	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		428
		429	/* fastert than SvSTATE, but expects a coroutine hv */
		430	INLINE struct coro *
		431	SvSTATE_hv (SV *sv)
		432	{
		433	MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
		434	? SvMAGIC (sv)
		435	: mg_find (sv, CORO_MAGIC_type_state);
		436
		437	return (struct coro *)mg->mg_ptr;
		438	}
		439
		440	#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
414		441
415	/* the next two functions merely cache the padlists */	442	/* the next two functions merely cache the padlists */
416	static void	443	static void
417	get_padlist (pTHX_ CV *cv)	444	get_padlist (pTHX_ CV *cv)
418	{	445	{
…		…
485	CvPADLIST (cv) = (AV *)POPs;	512	CvPADLIST (cv) = (AV *)POPs;
486	}	513	}
487		514
488	PUTBACK;	515	PUTBACK;
489	}	516	}
		517
		518	slf_frame = c->slf_frame;
490	}	519	}
491		520
492	static void	521	static void
493	save_perl (pTHX_ Coro__State c)	522	save_perl (pTHX_ Coro__State c)
494	{	523	{
		524	c->slf_frame = slf_frame;
		525
495	{	526	{
496	dSP;	527	dSP;
497	I32 cxix = cxstack_ix;	528	I32 cxix = cxstack_ix;
498	PERL_CONTEXT *ccstk = cxstack;	529	PERL_CONTEXT *ccstk = cxstack;
499	PERL_SI *top_si = PL_curstackinfo;	530	PERL_SI *top_si = PL_curstackinfo;
…		…
566	#undef VAR	597	#undef VAR
567	}	598	}
568	}	599	}
569		600
570	/*	601	/*
571	* allocate various perl stacks. This is an exact copy	602	* allocate various perl stacks. This is almost an exact copy
572	* of perl.c:init_stacks, except that it uses less memory	603	* of perl.c:init_stacks, except that it uses less memory
573	* on the (sometimes correct) assumption that coroutines do	604	* on the (sometimes correct) assumption that coroutines do
574	* not usually need a lot of stackspace.	605	* not usually need a lot of stackspace.
575	*/	606	*/
576	#if CORO_PREFER_PERL_FUNCTIONS	607	#if CORO_PREFER_PERL_FUNCTIONS
…		…
619		650
620	/*	651	/*
621	* destroy the stacks, the callchain etc...	652	* destroy the stacks, the callchain etc...
622	*/	653	*/
623	static void	654	static void
624	coro_destroy_stacks (pTHX)	655	coro_destruct_stacks (pTHX)
625	{	656	{
626	while (PL_curstackinfo->si_next)	657	while (PL_curstackinfo->si_next)
627	PL_curstackinfo = PL_curstackinfo->si_next;	658	PL_curstackinfo = PL_curstackinfo->si_next;
628		659
629	while (PL_curstackinfo)	660	while (PL_curstackinfo)
…		…
778		809
779	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;	810	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
780	}	811	}
781		812
782	static void	813	static void
		814	prepare_nop (pTHX_ struct coro_transfer_args *ta)
		815	{
		816	/* kind of mega-hacky, but works */
		817	ta->next = ta->prev = (struct coro *)ta;
		818	}
		819
		820	static int
		821	slf_check_nop (pTHX_ struct CoroSLF *frame)
		822	{
		823	return 0;
		824	}
		825
		826	static void
783	coro_setup (pTHX_ struct coro *coro)	827	coro_setup (pTHX_ struct coro *coro)
784	{	828	{
785	/*	829	/*
786	* emulate part of the perl startup here.	830	* emulate part of the perl startup here.
787	*/	831	*/
…		…
807	GvSV (PL_defgv) = newSV (0);	851	GvSV (PL_defgv) = newSV (0);
808	GvAV (PL_defgv) = coro->args; coro->args = 0;	852	GvAV (PL_defgv) = coro->args; coro->args = 0;
809	GvSV (PL_errgv) = newSV (0);	853	GvSV (PL_errgv) = newSV (0);
810	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);	854	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
811	PL_rs = newSVsv (GvSV (irsgv));	855	PL_rs = newSVsv (GvSV (irsgv));
812	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);	856	PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
813		857
814	{	858	{
815	dSP;	859	dSP;
816	LOGOP myop;	860	UNOP myop;
817		861
818	Zero (&myop, 1, LOGOP);	862	Zero (&myop, 1, UNOP);
819	myop.op_next = Nullop;	863	myop.op_next = Nullop;
820	myop.op_flags = OPf_WANT_VOID;	864	myop.op_flags = OPf_WANT_VOID;
821		865
822	PUSHMARK (SP);	866	PUSHMARK (SP);
823	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));	867	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
…		…
826	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	870	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
827	SPAGAIN;	871	SPAGAIN;
828	}	872	}
829		873
830	/* this newly created coroutine might be run on an existing cctx which most	874	/* this newly created coroutine might be run on an existing cctx which most
831	* likely was suspended in set_stacklevel, called from entersub.	875	* likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
832	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
833	* so we ENTER here for symmetry
834	*/	876	*/
835	ENTER;	877	slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
		878	slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
836	}	879	}
837		880
838	static void	881	static void
839	coro_destroy (pTHX_ struct coro *coro)	882	coro_destruct (pTHX_ struct coro *coro)
840	{	883	{
841	if (!IN_DESTRUCT)	884	if (!IN_DESTRUCT)
842	{	885	{
843	/* restore all saved variables and stuff */	886	/* restore all saved variables and stuff */
844	LEAVE_SCOPE (0);	887	LEAVE_SCOPE (0);
…		…
866	SvREFCNT_dec (PL_warnhook);	909	SvREFCNT_dec (PL_warnhook);
867		910
868	SvREFCNT_dec (coro->saved_deffh);	911	SvREFCNT_dec (coro->saved_deffh);
869	SvREFCNT_dec (coro->throw);	912	SvREFCNT_dec (coro->throw);
870		913
871	coro_destroy_stacks (aTHX);	914	coro_destruct_stacks (aTHX);
872	}	915	}
873		916
874	static void	917	INLINE void
875	free_coro_mortal (pTHX)	918	free_coro_mortal (pTHX)
876	{	919	{
877	if (expect_true (coro_mortal))	920	if (expect_true (coro_mortal))
878	{	921	{
879	SvREFCNT_dec (coro_mortal);	922	SvREFCNT_dec (coro_mortal);
…		…
884	static int	927	static int
885	runops_trace (pTHX)	928	runops_trace (pTHX)
886	{	929	{
887	COP *oldcop = 0;	930	COP *oldcop = 0;
888	int oldcxix = -2;	931	int oldcxix = -2;
889	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */	932	struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
890	coro_cctx *cctx = coro->cctx;	933	coro_cctx *cctx = coro->cctx;
891		934
892	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	935	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
893	{	936	{
894	PERL_ASYNC_CHECK ();	937	PERL_ASYNC_CHECK ();
…		…
913	: cx->blk_gimme == G_SCALAR ? bot + 1	956	: cx->blk_gimme == G_SCALAR ? bot + 1
914	: bot;	957	: bot;
915		958
916	av_extend (av, top - bot);	959	av_extend (av, top - bot);
917	while (bot < top)	960	while (bot < top)
918	av_push (av, SvREFCNT_inc (*bot++));	961	av_push (av, SvREFCNT_inc_NN (*bot++));
919		962
920	PL_runops = RUNOPS_DEFAULT;	963	PL_runops = RUNOPS_DEFAULT;
921	ENTER;	964	ENTER;
922	SAVETMPS;	965	SAVETMPS;
923	EXTEND (SP, 3);	966	EXTEND (SP, 3);
…		…
1003		1046
1004	TAINT_NOT;	1047	TAINT_NOT;
1005	return 0;	1048	return 0;
1006	}	1049	}
1007		1050
		1051	static void
		1052	prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
		1053	{
		1054	ta->prev = (struct coro *)cctx;
		1055	ta->next = 0;
		1056	}
		1057
1008	/* inject a fake call to Coro::State::_cctx_init into the execution */	1058	/* inject a fake call to Coro::State::_cctx_init into the execution */
1009	/* _cctx_init should be careful, as it could be called at almost any time */	1059	/* _cctx_init should be careful, as it could be called at almost any time */
1010	/* during execution of a perl program */	1060	/* during execution of a perl program */
		1061	/* also initialises PL_top_env */
1011	static void NOINLINE	1062	static void NOINLINE
1012	cctx_prepare (pTHX_ coro_cctx *cctx)	1063	cctx_prepare (pTHX_ coro_cctx *cctx)
1013	{	1064	{
1014	dSP;	1065	dSP;
1015	LOGOP myop;	1066	UNOP myop;
1016		1067
1017	PL_top_env = &PL_start_env;	1068	PL_top_env = &PL_start_env;
1018		1069
1019	if (cctx->flags & CC_TRACE)	1070	if (cctx->flags & CC_TRACE)
1020	PL_runops = runops_trace;	1071	PL_runops = runops_trace;
1021		1072
1022	Zero (&myop, 1, LOGOP);	1073	Zero (&myop, 1, UNOP);
1023	myop.op_next = PL_op;	1074	myop.op_next = PL_op;
1024	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1075	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1025		1076
1026	PUSHMARK (SP);	1077	PUSHMARK (SP);
1027	EXTEND (SP, 2);	1078	EXTEND (SP, 2);
1028	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));	1079	PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1029	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1080	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1030	PUTBACK;	1081	PUTBACK;
1031	PL_op = (OP *)&myop;	1082	PL_op = (OP *)&myop;
1032	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1083	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1033	SPAGAIN;	1084	SPAGAIN;
1034	}	1085	}
1035		1086
		1087	/* the tail of transfer: execute stuff we can only do after a transfer */
		1088	INLINE void
		1089	transfer_tail (pTHX)
		1090	{
		1091	free_coro_mortal (aTHX);
		1092	}
		1093
1036	/*	1094	/*
1037	* this is a _very_ stripped down perl interpreter ;)	1095	* this is a _very_ stripped down perl interpreter ;)
1038	*/	1096	*/
1039	static void	1097	static void
1040	cctx_run (void *arg)	1098	cctx_run (void *arg)
1041	{	1099	{
		1100	#ifdef USE_ITHREADS
		1101	# if CORO_PTHREAD
		1102	PERL_SET_CONTEXT (coro_thx);
		1103	# endif
		1104	#endif
		1105	{
1042	dTHX;	1106	dTHX;
1043		1107
1044	/* cctx_run is the alternative tail of transfer(), so unlock here. */	1108	/* normally we would need to skip the entersub here */
1045	UNLOCK;	1109	/* not doing so will re-execute it, which is exactly what we want */
1046
1047	/* we now skip the entersub that lead to transfer() */
1048	PL_op = PL_op->op_next;	1110	/* PL_nop = PL_nop->op_next */
1049		1111
1050	/* inject a fake subroutine call to cctx_init */	1112	/* inject a fake subroutine call to cctx_init */
1051	cctx_prepare (aTHX_ (coro_cctx *)arg);	1113	cctx_prepare (aTHX_ (coro_cctx *)arg);
1052		1114
		1115	/* cctx_run is the alternative tail of transfer() */
		1116	transfer_tail (aTHX);
		1117
1053	/* somebody or something will hit me for both perl_run and PL_restartop */	1118	/* somebody or something will hit me for both perl_run and PL_restartop */
1054	PL_restartop = PL_op;	1119	PL_restartop = PL_op;
1055	perl_run (PL_curinterp);	1120	perl_run (PL_curinterp);
1056		1121
1057	/*	1122	/*
1058	* If perl-run returns we assume exit() was being called or the coro	1123	* If perl-run returns we assume exit() was being called or the coro
1059	* fell off the end, which seems to be the only valid (non-bug)	1124	* fell off the end, which seems to be the only valid (non-bug)
1060	* reason for perl_run to return. We try to exit by jumping to the	1125	* reason for perl_run to return. We try to exit by jumping to the
1061	* bootstrap-time "top" top_env, as we cannot restore the "main"	1126	* bootstrap-time "top" top_env, as we cannot restore the "main"
1062	* coroutine as Coro has no such concept	1127	* coroutine as Coro has no such concept
1063	*/	1128	*/
1064	PL_top_env = main_top_env;	1129	PL_top_env = main_top_env;
1065	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */	1130	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1131	}
1066	}	1132	}
1067		1133
1068	static coro_cctx *	1134	static coro_cctx *
1069	cctx_new ()	1135	cctx_new ()
1070	{	1136	{
1071	coro_cctx *cctx;	1137	coro_cctx *cctx;
		1138
		1139	++cctx_count;
		1140	New (0, cctx, 1, coro_cctx);
		1141
		1142	cctx->gen = cctx_gen;
		1143	cctx->flags = 0;
		1144	cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
		1145
		1146	return cctx;
		1147	}
		1148
		1149	/* create a new cctx only suitable as source */
		1150	static coro_cctx *
		1151	cctx_new_empty ()
		1152	{
		1153	coro_cctx *cctx = cctx_new ();
		1154
		1155	cctx->sptr = 0;
		1156	coro_create (&cctx->cctx, 0, 0, 0, 0);
		1157
		1158	return cctx;
		1159	}
		1160
		1161	/* create a new cctx suitable as destination/running a perl interpreter */
		1162	static coro_cctx *
		1163	cctx_new_run ()
		1164	{
		1165	coro_cctx *cctx = cctx_new ();
1072	void *stack_start;	1166	void *stack_start;
1073	size_t stack_size;	1167	size_t stack_size;
1074		1168
1075	++cctx_count;
1076
1077	Newz (0, cctx, 1, coro_cctx);
1078
1079	#if HAVE_MMAP	1169	#if HAVE_MMAP
1080	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1170	cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1081	/* mmap supposedly does allocate-on-write for us */	1171	/* mmap supposedly does allocate-on-write for us */
1082	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1172	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1083		1173
1084	if (cctx->sptr != (void *)-1)	1174	if (cctx->sptr != (void *)-1)
1085	{	1175	{
1086	# if CORO_STACKGUARD	1176	#if CORO_STACKGUARD
1087	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1177	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1088	# endif	1178	#endif
1089	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1179	stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1090	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1180	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1091	cctx->flags |= CC_MAPPED;	1181	cctx->flags |= CC_MAPPED;
1092	}	1182	}
1093	else	1183	else
1094	#endif	1184	#endif
1095	{	1185	{
1096	cctx->ssize = coro_stacksize * (long)sizeof (long);	1186	cctx->ssize = cctx_stacksize * (long)sizeof (long);
1097	New (0, cctx->sptr, coro_stacksize, long);	1187	New (0, cctx->sptr, cctx_stacksize, long);
1098		1188
1099	if (!cctx->sptr)	1189	if (!cctx->sptr)
1100	{	1190	{
1101	perror ("FATAL: unable to allocate stack for coroutine");	1191	perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1102	_exit (EXIT_FAILURE);	1192	_exit (EXIT_FAILURE);
1103	}	1193	}
1104		1194
1105	stack_start = cctx->sptr;	1195	stack_start = cctx->sptr;
1106	stack_size = cctx->ssize;	1196	stack_size = cctx->ssize;
1107	}	1197	}
1108		1198
1109	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1199	#if CORO_USE_VALGRIND
		1200	cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
		1201	#endif
		1202
1110	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);	1203	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1111		1204
1112	return cctx;	1205	return cctx;
1113	}	1206	}
1114		1207
…		…
1117	{	1210	{
1118	if (!cctx)	1211	if (!cctx)
1119	return;	1212	return;
1120		1213
1121	--cctx_count;	1214	--cctx_count;
		1215	coro_destroy (&cctx->cctx);
1122		1216
		1217	/* coro_transfer creates new, empty cctx's */
		1218	if (cctx->sptr)
		1219	{
1123	#if CORO_USE_VALGRIND	1220	#if CORO_USE_VALGRIND
1124	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1221	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1125	#endif	1222	#endif
1126		1223
1127	#if HAVE_MMAP	1224	#if HAVE_MMAP
1128	if (cctx->flags & CC_MAPPED)	1225	if (cctx->flags & CC_MAPPED)
1129	munmap (cctx->sptr, cctx->ssize);	1226	munmap (cctx->sptr, cctx->ssize);
1130	else	1227	else
1131	#endif	1228	#endif
1132	Safefree (cctx->sptr);	1229	Safefree (cctx->sptr);
		1230	}
1133		1231
1134	Safefree (cctx);	1232	Safefree (cctx);
1135	}	1233	}
1136		1234
1137	/* wether this cctx should be destructed */	1235	/* wether this cctx should be destructed */
1138	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))	1236	#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1139		1237
1140	static coro_cctx *	1238	static coro_cctx *
1141	cctx_get (pTHX)	1239	cctx_get (pTHX)
1142	{	1240	{
1143	while (expect_true (cctx_first))	1241	while (expect_true (cctx_first))
…		…
1150	return cctx;	1248	return cctx;
1151		1249
1152	cctx_destroy (cctx);	1250	cctx_destroy (cctx);
1153	}	1251	}
1154		1252
1155	return cctx_new ();	1253	return cctx_new_run ();
1156	}	1254	}
1157		1255
1158	static void	1256	static void
1159	cctx_put (coro_cctx *cctx)	1257	cctx_put (coro_cctx *cctx)
1160	{	1258	{
		1259	assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
		1260
1161	/* free another cctx if overlimit */	1261	/* free another cctx if overlimit */
1162	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))	1262	if (expect_false (cctx_idle >= cctx_max_idle))
1163	{	1263	{
1164	coro_cctx *first = cctx_first;	1264	coro_cctx *first = cctx_first;
1165	cctx_first = first->next;	1265	cctx_first = first->next;
1166	--cctx_idle;	1266	--cctx_idle;
1167		1267
…		…
1179	transfer_check (pTHX_ struct coro *prev, struct coro *next)	1279	transfer_check (pTHX_ struct coro *prev, struct coro *next)
1180	{	1280	{
1181	if (expect_true (prev != next))	1281	if (expect_true (prev != next))
1182	{	1282	{
1183	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))	1283	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1184	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1284	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1185		1285
1186	if (expect_false (next->flags & CF_RUNNING))	1286	if (expect_false (next->flags & CF_RUNNING))
1187	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1287	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1188		1288
1189	if (expect_false (next->flags & CF_DESTROYED))	1289	if (expect_false (next->flags & CF_DESTROYED))
1190	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1290	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1191		1291
1192	#if !PERL_VERSION_ATLEAST (5,10,0)	1292	#if !PERL_VERSION_ATLEAST (5,10,0)
1193	if (expect_false (PL_lex_state != LEX_NOTPARSING))	1293	if (expect_false (PL_lex_state != LEX_NOTPARSING))
1194	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");	1294	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1195	#endif	1295	#endif
1196	}	1296	}
1197	}	1297	}
1198		1298
1199	/* always use the TRANSFER macro */	1299	/* always use the TRANSFER macro */
1200	static void NOINLINE	1300	static void NOINLINE
1201	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)	1301	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1202	{	1302	{
1203	dSTACKLEVEL;	1303	dSTACKLEVEL;
1204	static volatile int has_throw;
1205		1304
1206	/* sometimes transfer is only called to set idle_sp */	1305	/* sometimes transfer is only called to set idle_sp */
1207	if (expect_false (!next))	1306	if (expect_false (!next))
1208	{	1307	{
1209	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1308	((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1210	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1309	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1211	}	1310	}
1212	else if (expect_true (prev != next))	1311	else if (expect_true (prev != next))
1213	{	1312	{
1214	coro_cctx *prev__cctx;	1313	coro_cctx *prev__cctx;
1215		1314
1216	if (expect_false (prev->flags & CF_NEW))	1315	if (expect_false (prev->flags & CF_NEW))
1217	{	1316	{
1218	/* create a new empty context */	1317	/* create a new empty/source context */
1219	Newz (0, prev->cctx, 1, coro_cctx);	1318	prev->cctx = cctx_new_empty ();
1220	prev->flags &= ~CF_NEW;	1319	prev->flags &= ~CF_NEW;
1221	prev->flags |= CF_RUNNING;	1320	prev->flags |= CF_RUNNING;
1222	}	1321	}
1223		1322
1224	prev->flags &= ~CF_RUNNING;	1323	prev->flags &= ~CF_RUNNING;
1225	next->flags |= CF_RUNNING;	1324	next->flags |= CF_RUNNING;
1226
1227	LOCK;
1228		1325
1229	/* first get rid of the old state */	1326	/* first get rid of the old state */
1230	save_perl (aTHX_ prev);	1327	save_perl (aTHX_ prev);
1231		1328
1232	if (expect_false (next->flags & CF_NEW))	1329	if (expect_false (next->flags & CF_NEW))
…		…
1239	else	1336	else
1240	load_perl (aTHX_ next);	1337	load_perl (aTHX_ next);
1241		1338
1242	prev__cctx = prev->cctx;	1339	prev__cctx = prev->cctx;
1243		1340
1244	/* possibly "free" the cctx */	1341	/* possibly untie and reuse the cctx */
1245	if (expect_true (	1342	if (expect_true (
1246	prev__cctx->idle_sp == STACKLEVEL	1343	prev__cctx->idle_sp == (void *)stacklevel
1247	&& !(prev__cctx->flags & CC_TRACE)	1344	&& !(prev__cctx->flags & CC_TRACE)
1248	&& !force_cctx	1345	&& !force_cctx
1249	))	1346	))
1250	{	1347	{
1251	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1348	/* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1252	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1349	assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1253		1350
1254	prev->cctx = 0;	1351	prev->cctx = 0;
1255		1352
1256	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */	1353	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1257	/* without this the next cctx_get might destroy the prev__cctx while still in use */	1354	/* without this the next cctx_get might destroy the prev__cctx while still in use */
…		…
1264		1361
1265	++next->usecount;	1362	++next->usecount;
1266		1363
1267	if (expect_true (!next->cctx))	1364	if (expect_true (!next->cctx))
1268	next->cctx = cctx_get (aTHX);	1365	next->cctx = cctx_get (aTHX);
1269
1270	has_throw = !!next->throw;
1271		1366
1272	if (expect_false (prev__cctx != next->cctx))	1367	if (expect_false (prev__cctx != next->cctx))
1273	{	1368	{
1274	prev__cctx->top_env = PL_top_env;	1369	prev__cctx->top_env = PL_top_env;
1275	PL_top_env = next->cctx->top_env;	1370	PL_top_env = next->cctx->top_env;
1276	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1371	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1277	}	1372	}
1278		1373
1279	free_coro_mortal (aTHX);	1374	transfer_tail (aTHX);
1280	UNLOCK;
1281
1282	if (expect_false (has_throw))
1283	{
1284	struct coro *coro = SvSTATE (coro_current);
1285
1286	if (coro->throw)
1287	{
1288	SV *exception = coro->throw;
1289	coro->throw = 0;
1290	sv_setsv (ERRSV, exception);
1291	croak (0);
1292	}
1293	}
1294	}	1375	}
1295	}	1376	}
1296
1297	struct transfer_args
1298	{
1299	struct coro *prev, *next;
1300	};
1301		1377
1302	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))	1378	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1303	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1379	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1304		1380
1305	/** high level stuff ********************************************************/	1381	/** high level stuff ********************************************************/
…		…
1307	static int	1383	static int
1308	coro_state_destroy (pTHX_ struct coro *coro)	1384	coro_state_destroy (pTHX_ struct coro *coro)
1309	{	1385	{
1310	if (coro->flags & CF_DESTROYED)	1386	if (coro->flags & CF_DESTROYED)
1311	return 0;	1387	return 0;
		1388
		1389	if (coro->on_destroy)
		1390	coro->on_destroy (aTHX_ coro);
1312		1391
1313	coro->flags |= CF_DESTROYED;	1392	coro->flags |= CF_DESTROYED;
1314		1393
1315	if (coro->flags & CF_READY)	1394	if (coro->flags & CF_READY)
1316	{	1395	{
1317	/* reduce nready, as destroying a ready coro effectively unreadies it */	1396	/* reduce nready, as destroying a ready coro effectively unreadies it */
1318	/* alternative: look through all ready queues and remove the coro */	1397	/* alternative: look through all ready queues and remove the coro */
1319	LOCK;
1320	--coro_nready;	1398	--coro_nready;
1321	UNLOCK;
1322	}	1399	}
1323	else	1400	else
1324	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */	1401	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1325		1402
1326	if (coro->mainstack && coro->mainstack != main_mainstack)	1403	if (coro->mainstack && coro->mainstack != main_mainstack)
1327	{	1404	{
1328	struct coro temp;	1405	struct coro temp;
1329		1406
1330	if (coro->flags & CF_RUNNING)	1407	assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1331	croak ("FATAL: tried to destroy currently running coroutine");
1332		1408
1333	save_perl (aTHX_ &temp);	1409	save_perl (aTHX_ &temp);
1334	load_perl (aTHX_ coro);	1410	load_perl (aTHX_ coro);
1335		1411
1336	coro_destroy (aTHX_ coro);	1412	coro_destruct (aTHX_ coro);
1337		1413
1338	load_perl (aTHX_ &temp);	1414	load_perl (aTHX_ &temp);
1339		1415
1340	coro->slot = 0;	1416	coro->slot = 0;
1341	}	1417	}
…		…
1387	# define MGf_DUP 0	1463	# define MGf_DUP 0
1388	#endif	1464	#endif
1389	};	1465	};
1390		1466
1391	static void	1467	static void
1392	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1468	prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1393	{	1469	{
1394	ta->prev = SvSTATE (prev_sv);	1470	ta->prev = SvSTATE (prev_sv);
1395	ta->next = SvSTATE (next_sv);	1471	ta->next = SvSTATE (next_sv);
1396	TRANSFER_CHECK (*ta);	1472	TRANSFER_CHECK (*ta);
1397	}	1473	}
1398		1474
1399	static void	1475	static void
1400	api_transfer (SV *prev_sv, SV *next_sv)	1476	api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1401	{	1477	{
1402	dTHX;
1403	struct transfer_args ta;	1478	struct coro_transfer_args ta;
1404		1479
1405	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1480	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1406	TRANSFER (ta, 1);	1481	TRANSFER (ta, 1);
1407	}	1482	}
1408		1483
1409	/** Coro ********************************************************************/	1484	/** Coro ********************************************************************/
1410		1485
1411	static void	1486	INLINE void
1412	coro_enq (pTHX_ SV *coro_sv)	1487	coro_enq (pTHX_ struct coro *coro)
1413	{	1488	{
1414	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1489	av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1415	}	1490	}
1416		1491
1417	static SV *	1492	INLINE SV *
1418	coro_deq (pTHX)	1493	coro_deq (pTHX)
1419	{	1494	{
1420	int prio;	1495	int prio;
1421		1496
1422	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )	1497	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
…		…
1425		1500
1426	return 0;	1501	return 0;
1427	}	1502	}
1428		1503
1429	static int	1504	static int
1430	api_ready (SV *coro_sv)	1505	api_ready (pTHX_ SV *coro_sv)
1431	{	1506	{
1432	dTHX;
1433	struct coro *coro;	1507	struct coro *coro;
1434	SV *sv_hook;	1508	SV *sv_hook;
1435	void (*xs_hook)(void);	1509	void (*xs_hook)(void);
1436		1510
1437	if (SvROK (coro_sv))	1511	if (SvROK (coro_sv))
…		…
1442	if (coro->flags & CF_READY)	1516	if (coro->flags & CF_READY)
1443	return 0;	1517	return 0;
1444		1518
1445	coro->flags |= CF_READY;	1519	coro->flags |= CF_READY;
1446		1520
1447	LOCK;
1448
1449	sv_hook = coro_nready ? 0 : coro_readyhook;	1521	sv_hook = coro_nready ? 0 : coro_readyhook;
1450	xs_hook = coro_nready ? 0 : coroapi.readyhook;	1522	xs_hook = coro_nready ? 0 : coroapi.readyhook;
1451		1523
1452	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));	1524	coro_enq (aTHX_ coro);
1453	++coro_nready;	1525	++coro_nready;
1454		1526
1455	UNLOCK;
1456
1457	if (sv_hook)	1527	if (sv_hook)
1458	{	1528	{
1459	dSP;	1529	dSP;
1460		1530
1461	ENTER;	1531	ENTER;
…		…
1475		1545
1476	return 1;	1546	return 1;
1477	}	1547	}
1478		1548
1479	static int	1549	static int
1480	api_is_ready (SV *coro_sv)	1550	api_is_ready (pTHX_ SV *coro_sv)
1481	{	1551	{
1482	dTHX;
1483	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1552	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1484	}	1553	}
1485		1554
1486	static void	1555	INLINE void
1487	prepare_schedule (pTHX_ struct transfer_args *ta)	1556	prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1488	{	1557	{
1489	SV *prev_sv, *next_sv;	1558	SV *prev_sv, *next_sv;
1490		1559
1491	for (;;)	1560	for (;;)
1492	{	1561	{
1493	LOCK;
1494	next_sv = coro_deq (aTHX);	1562	next_sv = coro_deq (aTHX);
1495		1563
1496	/* nothing to schedule: call the idle handler */	1564	/* nothing to schedule: call the idle handler */
1497	if (expect_false (!next_sv))	1565	if (expect_false (!next_sv))
1498	{	1566	{
1499	dSP;	1567	dSP;
1500	UNLOCK;
1501		1568
1502	ENTER;	1569	ENTER;
1503	SAVETMPS;	1570	SAVETMPS;
1504		1571
1505	PUSHMARK (SP);	1572	PUSHMARK (SP);
…		…
1510	FREETMPS;	1577	FREETMPS;
1511	LEAVE;	1578	LEAVE;
1512	continue;	1579	continue;
1513	}	1580	}
1514		1581
1515	ta->next = SvSTATE (next_sv);	1582	ta->next = SvSTATE_hv (next_sv);
1516		1583
1517	/* cannot transfer to destroyed coros, skip and look for next */	1584	/* cannot transfer to destroyed coros, skip and look for next */
1518	if (expect_false (ta->next->flags & CF_DESTROYED))	1585	if (expect_false (ta->next->flags & CF_DESTROYED))
1519	{	1586	{
1520	UNLOCK;
1521	SvREFCNT_dec (next_sv);	1587	SvREFCNT_dec (next_sv);
1522	/* coro_nready is already taken care of by destroy */	1588	/* coro_nready has already been taken care of by destroy */
1523	continue;	1589	continue;
1524	}	1590	}
1525		1591
1526	--coro_nready;	1592	--coro_nready;
1527	UNLOCK;
1528	break;	1593	break;
1529	}	1594	}
1530		1595
1531	/* free this only after the transfer */	1596	/* free this only after the transfer */
1532	prev_sv = SvRV (coro_current);	1597	prev_sv = SvRV (coro_current);
1533	ta->prev = SvSTATE (prev_sv);	1598	ta->prev = SvSTATE_hv (prev_sv);
1534	TRANSFER_CHECK (*ta);	1599	TRANSFER_CHECK (*ta);
1535	assert (ta->next->flags & CF_READY);	1600	assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1536	ta->next->flags &= ~CF_READY;	1601	ta->next->flags &= ~CF_READY;
1537	SvRV_set (coro_current, next_sv);	1602	SvRV_set (coro_current, next_sv);
1538		1603
1539	LOCK;
1540	free_coro_mortal (aTHX);	1604	free_coro_mortal (aTHX);
1541	coro_mortal = prev_sv;	1605	coro_mortal = prev_sv;
1542	UNLOCK;
1543	}	1606	}
1544		1607
1545	static void	1608	INLINE void
1546	prepare_cede (pTHX_ struct transfer_args *ta)	1609	prepare_cede (pTHX_ struct coro_transfer_args *ta)
1547	{	1610	{
1548	api_ready (coro_current);	1611	api_ready (aTHX_ coro_current);
1549	prepare_schedule (aTHX_ ta);	1612	prepare_schedule (aTHX_ ta);
1550	}	1613	}
1551		1614
		1615	INLINE void
		1616	prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
		1617	{
		1618	SV *prev = SvRV (coro_current);
		1619
		1620	if (coro_nready)
		1621	{
		1622	prepare_schedule (aTHX_ ta);
		1623	api_ready (aTHX_ prev);
		1624	}
		1625	else
		1626	prepare_nop (aTHX_ ta);
		1627	}
		1628
		1629	static void
		1630	api_schedule (pTHX)
		1631	{
		1632	struct coro_transfer_args ta;
		1633
		1634	prepare_schedule (aTHX_ &ta);
		1635	TRANSFER (ta, 1);
		1636	}
		1637
1552	static int	1638	static int
1553	prepare_cede_notself (pTHX_ struct transfer_args *ta)	1639	api_cede (pTHX)
1554	{	1640	{
1555	if (coro_nready)	1641	struct coro_transfer_args ta;
1556	{	1642
1557	SV *prev = SvRV (coro_current);
1558	prepare_schedule (aTHX_ ta);	1643	prepare_cede (aTHX_ &ta);
1559	api_ready (prev);	1644
		1645	if (expect_true (ta.prev != ta.next))
		1646	{
		1647	TRANSFER (ta, 1);
1560	return 1;	1648	return 1;
1561	}	1649	}
1562	else	1650	else
1563	return 0;	1651	return 0;
1564	}	1652	}
1565		1653
1566	static void
1567	api_schedule (void)
1568	{
1569	dTHX;
1570	struct transfer_args ta;
1571
1572	prepare_schedule (aTHX_ &ta);
1573	TRANSFER (ta, 1);
1574	}
1575
1576	static int	1654	static int
1577	api_cede (void)	1655	api_cede_notself (pTHX)
1578	{	1656	{
1579	dTHX;	1657	if (coro_nready)
		1658	{
1580	struct transfer_args ta;	1659	struct coro_transfer_args ta;
1581		1660
1582	prepare_cede (aTHX_ &ta);	1661	prepare_cede_notself (aTHX_ &ta);
1583
1584	if (expect_true (ta.prev != ta.next))
1585	{
1586	TRANSFER (ta, 1);	1662	TRANSFER (ta, 1);
1587	return 1;	1663	return 1;
1588	}	1664	}
1589	else	1665	else
1590	return 0;	1666	return 0;
1591	}	1667	}
1592		1668
1593	static int	1669	static void
1594	api_cede_notself (void)
1595	{
1596	dTHX;
1597	struct transfer_args ta;
1598
1599	if (prepare_cede_notself (aTHX_ &ta))
1600	{
1601	TRANSFER (ta, 1);
1602	return 1;
1603	}
1604	else
1605	return 0;
1606	}
1607
1608	static void
1609	api_trace (SV *coro_sv, int flags)	1670	api_trace (pTHX_ SV *coro_sv, int flags)
1610	{	1671	{
1611	dTHX;
1612	struct coro *coro = SvSTATE (coro_sv);	1672	struct coro *coro = SvSTATE (coro_sv);
1613		1673
1614	if (flags & CC_TRACE)	1674	if (flags & CC_TRACE)
1615	{	1675	{
1616	if (!coro->cctx)	1676	if (!coro->cctx)
1617	coro->cctx = cctx_new ();	1677	coro->cctx = cctx_new_run ();
1618	else if (!(coro->cctx->flags & CC_TRACE))	1678	else if (!(coro->cctx->flags & CC_TRACE))
1619	croak ("cannot enable tracing on coroutine with custom stack");	1679	croak ("cannot enable tracing on coroutine with custom stack,");
1620		1680
1621	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));	1681	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1622	}	1682	}
1623	else if (coro->cctx && coro->cctx->flags & CC_TRACE)	1683	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1624	{	1684	{
…		…
1629	else	1689	else
1630	coro->slot->runops = RUNOPS_DEFAULT;	1690	coro->slot->runops = RUNOPS_DEFAULT;
1631	}	1691	}
1632	}	1692	}
1633		1693
		1694	/*****************************************************************************/
		1695	/* PerlIO::cede */
		1696
		1697	typedef struct
		1698	{
		1699	PerlIOBuf base;
		1700	NV next, every;
		1701	} PerlIOCede;
		1702
		1703	static IV
		1704	PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
		1705	{
		1706	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1707
		1708	self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
		1709	self->next = nvtime () + self->every;
		1710
		1711	return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
		1712	}
		1713
		1714	static SV *
		1715	PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
		1716	{
		1717	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1718
		1719	return newSVnv (self->every);
		1720	}
		1721
		1722	static IV
		1723	PerlIOCede_flush (pTHX_ PerlIO *f)
		1724	{
		1725	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1726	double now = nvtime ();
		1727
		1728	if (now >= self->next)
		1729	{
		1730	api_cede (aTHX);
		1731	self->next = now + self->every;
		1732	}
		1733
		1734	return PerlIOBuf_flush (aTHX_ f);
		1735	}
		1736
		1737	static PerlIO_funcs PerlIO_cede =
		1738	{
		1739	sizeof(PerlIO_funcs),
		1740	"cede",
		1741	sizeof(PerlIOCede),
		1742	PERLIO_K_DESTRUCT | PERLIO_K_RAW,
		1743	PerlIOCede_pushed,
		1744	PerlIOBuf_popped,
		1745	PerlIOBuf_open,
		1746	PerlIOBase_binmode,
		1747	PerlIOCede_getarg,
		1748	PerlIOBase_fileno,
		1749	PerlIOBuf_dup,
		1750	PerlIOBuf_read,
		1751	PerlIOBuf_unread,
		1752	PerlIOBuf_write,
		1753	PerlIOBuf_seek,
		1754	PerlIOBuf_tell,
		1755	PerlIOBuf_close,
		1756	PerlIOCede_flush,
		1757	PerlIOBuf_fill,
		1758	PerlIOBase_eof,
		1759	PerlIOBase_error,
		1760	PerlIOBase_clearerr,
		1761	PerlIOBase_setlinebuf,
		1762	PerlIOBuf_get_base,
		1763	PerlIOBuf_bufsiz,
		1764	PerlIOBuf_get_ptr,
		1765	PerlIOBuf_get_cnt,
		1766	PerlIOBuf_set_ptrcnt,
		1767	};
		1768
		1769	/*****************************************************************************/
		1770
		1771	static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
		1772	static const CV *slf_cv;
		1773	static SV *slf_arg0;
		1774	static SV *slf_arg1;
		1775	static SV *slf_arg2;
		1776	static I32 slf_ax; /* top of stack, for restore */
		1777
		1778	/* this restores the stack in the case we patched the entersub, to */
		1779	/* recreate the stack frame as perl will on following calls */
		1780	/* since entersub cleared the stack */
		1781	static OP *
		1782	pp_restore (pTHX)
		1783	{
		1784	SV **SP = PL_stack_base + slf_ax;
		1785
		1786	PUSHMARK (SP);
		1787
		1788	EXTEND (SP, 3);
		1789	if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
		1790	if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
		1791	if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
		1792	PUSHs ((SV *)CvGV (slf_cv));
		1793
		1794	RETURNOP (slf_restore.op_first);
		1795	}
		1796
		1797	static void
		1798	slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
		1799	{
		1800	prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
		1801	}
		1802
		1803	static void
		1804	slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1805	{
		1806	assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
		1807
		1808	frame->prepare = slf_prepare_set_stacklevel;
		1809	frame->check = slf_check_nop;
		1810	frame->data = (void *)SvIV (arg [0]);
		1811	}
		1812
		1813	static void
		1814	slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
		1815	{
		1816	SV **arg = (SV **)slf_frame.data;
		1817
		1818	prepare_transfer (aTHX_ ta, arg [0], arg [1]);
		1819
		1820	/* if the destination has ->throw set, then copy it */
		1821	/* into the current coro's throw slot, so it will be raised */
		1822	/* after the schedule */
		1823	if (expect_false (ta->next->throw))
		1824	{
		1825	struct coro *coro = SvSTATE_current;
		1826	SvREFCNT_dec (coro->throw);
		1827	coro->throw = ta->next->throw;
		1828	ta->next->throw = 0;
		1829	}
		1830	}
		1831
		1832	static void
		1833	slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1834	{
		1835	if (items != 2)
		1836	croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
		1837
		1838	frame->prepare = slf_prepare_transfer;
		1839	frame->check = slf_check_nop;
		1840	frame->data = (void *)arg; /* let's hope it will stay valid */
		1841	}
		1842
		1843	static void
		1844	slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1845	{
		1846	frame->prepare = prepare_schedule;
		1847	frame->check = slf_check_nop;
		1848	}
		1849
		1850	static void
		1851	slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1852	{
		1853	frame->prepare = prepare_cede;
		1854	frame->check = slf_check_nop;
		1855	}
		1856
		1857	static void
		1858	slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		1859	{
		1860	frame->prepare = prepare_cede_notself;
		1861	frame->check = slf_check_nop;
		1862	}
		1863
		1864	/* we hijack an hopefully unused CV flag for our purposes */
		1865	#define CVf_SLF 0x4000
		1866
		1867	/*
		1868	* these not obviously related functions are all rolled into one
		1869	* function to increase chances that they all will call transfer with the same
		1870	* stack offset
		1871	* SLF stands for "schedule-like-function".
		1872	*/
		1873	static OP *
		1874	pp_slf (pTHX)
		1875	{
		1876	I32 checkmark; /* mark SP to see how many elements check has pushed */
		1877
		1878	/* set up the slf frame, unless it has already been set-up */
		1879	/* the latter happens when a new coro has been started */
		1880	/* or when a new cctx was attached to an existing coroutine */
		1881	if (expect_true (!slf_frame.prepare))
		1882	{
		1883	/* first iteration */
		1884	dSP;
		1885	SV **arg = PL_stack_base + TOPMARK + 1;
		1886	int items = SP - arg; /* args without function object */
		1887	SV *gv = *sp;
		1888
		1889	/* do a quick consistency check on the "function" object, and if it isn't */
		1890	/* for us, divert to the real entersub */
		1891	if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
		1892	return PL_ppaddr[OP_ENTERSUB](aTHX);
		1893
		1894	if (!(PL_op->op_flags & OPf_STACKED))
		1895	{
		1896	/* ampersand-form of call, use @_ instead of stack */
		1897	AV *av = GvAV (PL_defgv);
		1898	arg = AvARRAY (av);
		1899	items = AvFILLp (av) + 1;
		1900	}
		1901
		1902	/* now call the init function, which needs to set up slf_frame */
		1903	((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
		1904	(aTHX_ &slf_frame, GvCV (gv), arg, items);
		1905
		1906	/* pop args */
		1907	SP = PL_stack_base + POPMARK;
		1908
		1909	PUTBACK;
		1910	}
		1911
		1912	/* now that we have a slf_frame, interpret it! */
		1913	/* we use a callback system not to make the code needlessly */
		1914	/* complicated, but so we can run multiple perl coros from one cctx */
		1915
		1916	do
		1917	{
		1918	struct coro_transfer_args ta;
		1919
		1920	slf_frame.prepare (aTHX_ &ta);
		1921	TRANSFER (ta, 0);
		1922
		1923	checkmark = PL_stack_sp - PL_stack_base;
		1924	}
		1925	while (slf_frame.check (aTHX_ &slf_frame));
		1926
		1927	{
		1928	dSP;
		1929	SV **bot = PL_stack_base + checkmark;
		1930	int gimme = GIMME_V;
		1931
		1932	slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
		1933
		1934	/* make sure we put something on the stack in scalar context */
		1935	if (gimme == G_SCALAR)
		1936	{
		1937	if (sp == bot)
		1938	XPUSHs (&PL_sv_undef);
		1939
		1940	SP = bot + 1;
		1941	}
		1942
		1943	PUTBACK;
		1944	}
		1945
		1946	{
		1947	struct coro *coro = SvSTATE_current;
		1948
		1949	if (expect_false (coro->throw))
		1950	{
		1951	SV *exception = sv_2mortal (coro->throw);
		1952
		1953	coro->throw = 0;
		1954	sv_setsv (ERRSV, exception);
		1955	croak (0);
		1956	}
		1957	}
		1958
		1959	return NORMAL;
		1960	}
		1961
		1962	static void
		1963	api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
		1964	{
		1965	SV **arg = PL_stack_base + ax;
		1966	int items = PL_stack_sp - arg + 1;
		1967
		1968	assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
		1969
		1970	if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
		1971	&& PL_op->op_ppaddr != pp_slf)
		1972	croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
		1973
		1974	#if 0
		1975	if (items > 3)
		1976	croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
		1977	#endif
		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_CUSTOM;
		1988	slf_restore.op_ppaddr = pp_restore;
		1989	slf_restore.op_first = PL_op;
		1990
		1991	slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
		1992	slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
		1993	slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
		1994	slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
		1995
		1996	PL_op->op_ppaddr = pp_slf;
		1997	PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
		1998
		1999	PL_op = (OP *)&slf_restore;
		2000	}
		2001
		2002	/*****************************************************************************/
		2003
		2004	static void
		2005	coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
		2006	{
		2007	SV *count_sv = AvARRAY (av)[0];
		2008	IV count = SvIVX (count_sv);
		2009
		2010	count += adjust;
		2011	SvIVX (count_sv) = count;
		2012
		2013	/* now wake up as many waiters as are expected to lock */
		2014	while (count > 0 && AvFILLp (av) > 0)
		2015	{
		2016	SV *cb;
		2017
		2018	/* swap first two elements so we can shift a waiter */
		2019	AvARRAY (av)[0] = AvARRAY (av)[1];
		2020	AvARRAY (av)[1] = count_sv;
		2021	cb = av_shift (av);
		2022
		2023	if (SvOBJECT (cb))
		2024	api_ready (aTHX_ cb);
		2025	else
		2026	croak ("callbacks not yet supported");
		2027
		2028	SvREFCNT_dec (cb);
		2029
		2030	--count;
		2031	}
		2032	}
		2033
		2034	static void
		2035	coro_semaphore_on_destroy (pTHX_ struct coro *coro)
		2036	{
		2037	/* call $sem->adjust (0) to possibly wake up some other waiters */
		2038	coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
		2039	}
		2040
1634	static int	2041	static int
1635	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)	2042	slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
1636	{	2043	{
1637	AV *padlist;	2044	AV *av = (AV *)frame->data;
1638	AV *av = (AV *)mg->mg_obj;	2045	SV *count_sv = AvARRAY (av)[0];
1639		2046
1640	abort ();	2047	if (SvIVX (count_sv) > 0)
1641		2048	{
		2049	SvSTATE_current->on_destroy = 0;
		2050	SvIVX (count_sv) = SvIVX (count_sv) - 1;
1642	return 0;	2051	return 0;
1643	}	2052	}
		2053	else
		2054	{
		2055	int i;
		2056	/* if we were woken up but can't down, we look through the whole */
		2057	/* waiters list and only add us if we aren't in there already */
		2058	/* this avoids some degenerate memory usage cases */
1644		2059
1645	static MGVTBL coro_gensub_vtbl = {	2060	for (i = 1; i <= AvFILLp (av); ++i)
1646	0, 0, 0, 0,	2061	if (AvARRAY (av)[i] == SvRV (coro_current))
1647	coro_gensub_free	2062	return 1;
1648	};	2063
		2064	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2065	return 1;
		2066	}
		2067	}
		2068
		2069	static void
		2070	slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
		2071	{
		2072	AV *av = (AV *)SvRV (arg [0]);
		2073
		2074	if (SvIVX (AvARRAY (av)[0]) > 0)
		2075	{
		2076	frame->data = (void *)av;
		2077	frame->prepare = prepare_nop;
		2078	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2079	}
		2080	else
		2081	{
		2082	av_push (av, SvREFCNT_inc (SvRV (coro_current)));
		2083
		2084	frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
		2085	frame->prepare = prepare_schedule;
		2086
		2087	/* to avoid race conditions when a woken-up coro gets terminated */
		2088	/* we arrange for a temporary on_destroy that calls adjust (0) */
		2089	assert (!SvSTATE_current->on_destroy);//D
		2090	SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
		2091	}
		2092
		2093	frame->check = slf_check_semaphore_down;
		2094
		2095	}
		2096
		2097	/*****************************************************************************/
		2098
		2099	#define GENSUB_ARG CvXSUBANY (cv).any_ptr
		2100
		2101	/* create a closure from XS, returns a code reference */
		2102	/* the arg can be accessed via GENSUB_ARG from the callback */
		2103	/* the callback must use dXSARGS/XSRETURN */
		2104	static SV *
		2105	gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
		2106	{
		2107	CV *cv = (CV *)NEWSV (0, 0);
		2108
		2109	sv_upgrade ((SV *)cv, SVt_PVCV);
		2110
		2111	CvANON_on (cv);
		2112	CvISXSUB_on (cv);
		2113	CvXSUB (cv) = xsub;
		2114	GENSUB_ARG = arg;
		2115
		2116	return newRV_noinc ((SV *)cv);
		2117	}
		2118
		2119	/*****************************************************************************/
1649		2120
1650	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	2121	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1651		2122
1652	PROTOTYPES: DISABLE	2123	PROTOTYPES: DISABLE
1653		2124
1654	BOOT:	2125	BOOT:
1655	{	2126	{
1656	#ifdef USE_ITHREADS	2127	#ifdef USE_ITHREADS
1657	MUTEX_INIT (&coro_mutex);	2128	# if CORO_PTHREAD
		2129	coro_thx = PERL_GET_CONTEXT;
		2130	# endif
1658	#endif	2131	#endif
1659	BOOT_PAGESIZE;	2132	BOOT_PAGESIZE;
1660		2133
1661	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);	2134	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1662	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);	2135	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
…		…
1680	main_top_env = PL_top_env;	2153	main_top_env = PL_top_env;
1681		2154
1682	while (main_top_env->je_prev)	2155	while (main_top_env->je_prev)
1683	main_top_env = main_top_env->je_prev;	2156	main_top_env = main_top_env->je_prev;
1684		2157
		2158	{
		2159	SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
		2160
		2161	if (!PL_custom_op_names) PL_custom_op_names = newHV ();
		2162	hv_store_ent (PL_custom_op_names, slf,
		2163	newSVpv ("coro_slf", 0), 0);
		2164
		2165	if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
		2166	hv_store_ent (PL_custom_op_descs, slf,
		2167	newSVpv ("coro schedule like function", 0), 0);
		2168	}
		2169
1685	coroapi.ver = CORO_API_VERSION;	2170	coroapi.ver = CORO_API_VERSION;
1686	coroapi.rev = CORO_API_REVISION;	2171	coroapi.rev = CORO_API_REVISION;
		2172
1687	coroapi.transfer = api_transfer;	2173	coroapi.transfer = api_transfer;
		2174
		2175	coroapi.sv_state = SvSTATE_;
		2176	coroapi.execute_slf = api_execute_slf;
		2177	coroapi.prepare_nop = prepare_nop;
		2178	coroapi.prepare_schedule = prepare_schedule;
		2179	coroapi.prepare_cede = prepare_cede;
		2180	coroapi.prepare_cede_notself = prepare_cede_notself;
		2181
		2182	{
		2183	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
		2184
		2185	if (!svp) croak ("Time::HiRes is required");
		2186	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
		2187
		2188	nvtime = INT2PTR (double (*)(), SvIV (*svp));
		2189	}
1688		2190
1689	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	2191	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1690	}	2192	}
1691		2193
1692	SV *	2194	SV *
…		…
1716	av_push (coro->args, newSVsv (ST (i)));	2218	av_push (coro->args, newSVsv (ST (i)));
1717	}	2219	}
1718	OUTPUT:	2220	OUTPUT:
1719	RETVAL	2221	RETVAL
1720		2222
1721	# these not obviously related functions are all rolled into the same xs
1722	# function to increase chances that they all will call transfer with the same
1723	# stack offset
1724	void	2223	void
1725	_set_stacklevel (...)	2224	_set_stacklevel (...)
1726	ALIAS:	2225	CODE:
1727	Coro::State::transfer = 1	2226	CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1728	Coro::schedule = 2
1729	Coro::cede = 3
1730	Coro::cede_notself = 4
1731	CODE:
1732	{
1733	struct transfer_args ta;
1734		2227
1735	PUTBACK;	2228	void
1736	switch (ix)	2229	transfer (...)
1737	{	2230	PROTOTYPE: $$
1738	case 0:	2231	CODE:
1739	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	2232	CORO_EXECUTE_SLF_XS (slf_init_transfer);
1740	ta.next = 0;
1741	break;
1742
1743	case 1:
1744	if (items != 2)
1745	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1746
1747	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1748	break;
1749
1750	case 2:
1751	prepare_schedule (aTHX_ &ta);
1752	break;
1753
1754	case 3:
1755	prepare_cede (aTHX_ &ta);
1756	break;
1757
1758	case 4:
1759	if (!prepare_cede_notself (aTHX_ &ta))
1760	XSRETURN_EMPTY;
1761
1762	break;
1763	}
1764	SPAGAIN;
1765
1766	BARRIER;
1767	PUTBACK;
1768	TRANSFER (ta, 0);
1769	SPAGAIN; /* might be the sp of a different coroutine now */
1770	/* be extra careful not to ever do anything after TRANSFER */
1771	}
1772		2233
1773	bool	2234	bool
1774	_destroy (SV *coro_sv)	2235	_destroy (SV *coro_sv)
1775	CODE:	2236	CODE:
1776	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	2237	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
…		…
1783	CODE:	2244	CODE:
1784	_exit (code);	2245	_exit (code);
1785		2246
1786	int	2247	int
1787	cctx_stacksize (int new_stacksize = 0)	2248	cctx_stacksize (int new_stacksize = 0)
		2249	PROTOTYPE: ;$
1788	CODE:	2250	CODE:
1789	RETVAL = coro_stacksize;	2251	RETVAL = cctx_stacksize;
1790	if (new_stacksize)	2252	if (new_stacksize)
		2253	{
1791	coro_stacksize = new_stacksize;	2254	cctx_stacksize = new_stacksize;
		2255	++cctx_gen;
		2256	}
1792	OUTPUT:	2257	OUTPUT:
1793	RETVAL	2258	RETVAL
1794		2259
1795	int	2260	int
		2261	cctx_max_idle (int max_idle = 0)
		2262	PROTOTYPE: ;$
		2263	CODE:
		2264	RETVAL = cctx_max_idle;
		2265	if (max_idle > 1)
		2266	cctx_max_idle = max_idle;
		2267	OUTPUT:
		2268	RETVAL
		2269
		2270	int
1796	cctx_count ()	2271	cctx_count ()
		2272	PROTOTYPE:
1797	CODE:	2273	CODE:
1798	RETVAL = cctx_count;	2274	RETVAL = cctx_count;
1799	OUTPUT:	2275	OUTPUT:
1800	RETVAL	2276	RETVAL
1801		2277
1802	int	2278	int
1803	cctx_idle ()	2279	cctx_idle ()
		2280	PROTOTYPE:
1804	CODE:	2281	CODE:
1805	RETVAL = cctx_idle;	2282	RETVAL = cctx_idle;
1806	OUTPUT:	2283	OUTPUT:
1807	RETVAL	2284	RETVAL
1808		2285
1809	void	2286	void
1810	list ()	2287	list ()
		2288	PROTOTYPE:
1811	PPCODE:	2289	PPCODE:
1812	{	2290	{
1813	struct coro *coro;	2291	struct coro *coro;
1814	for (coro = coro_first; coro; coro = coro->next)	2292	for (coro = coro_first; coro; coro = coro->next)
1815	if (coro->hv)	2293	if (coro->hv)
…		…
1874	RETVAL = boolSV (coro->flags & ix);	2352	RETVAL = boolSV (coro->flags & ix);
1875	OUTPUT:	2353	OUTPUT:
1876	RETVAL	2354	RETVAL
1877		2355
1878	void	2356	void
		2357	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2358	PROTOTYPE: $;$
		2359	CODE:
		2360	SvREFCNT_dec (self->throw);
		2361	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2362
		2363	void
1879	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)	2364	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		2365	PROTOTYPE: $;$
		2366	C_ARGS: aTHX_ coro, flags
1880		2367
1881	SV *	2368	SV *
1882	has_cctx (Coro::State coro)	2369	has_cctx (Coro::State coro)
1883	PROTOTYPE: $	2370	PROTOTYPE: $
1884	CODE:	2371	CODE:
…		…
1892	CODE:	2379	CODE:
1893	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;	2380	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1894	OUTPUT:	2381	OUTPUT:
1895	RETVAL	2382	RETVAL
1896		2383
1897	IV	2384	UV
1898	rss (Coro::State coro)	2385	rss (Coro::State coro)
1899	PROTOTYPE: $	2386	PROTOTYPE: $
1900	ALIAS:	2387	ALIAS:
1901	usecount = 1	2388	usecount = 1
1902	CODE:	2389	CODE:
…		…
1908	OUTPUT:	2395	OUTPUT:
1909	RETVAL	2396	RETVAL
1910		2397
1911	void	2398	void
1912	force_cctx ()	2399	force_cctx ()
		2400	PROTOTYPE:
1913	CODE:	2401	CODE:
1914	struct coro *coro = SvSTATE (coro_current);
1915	coro->cctx->idle_sp = 0;	2402	SvSTATE_current->cctx->idle_sp = 0;
1916
1917	void
1918	throw (Coro::State self, SV *throw = &PL_sv_undef)
1919	PROTOTYPE: $;$
1920	CODE:
1921	SvREFCNT_dec (self->throw);
1922	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1923		2403
1924	void	2404	void
1925	swap_defsv (Coro::State self)	2405	swap_defsv (Coro::State self)
1926	PROTOTYPE: $	2406	PROTOTYPE: $
1927	ALIAS:	2407	ALIAS:
1928	swap_defav = 1	2408	swap_defav = 1
1929	CODE:	2409	CODE:
1930	if (!self->slot)	2410	if (!self->slot)
1931	croak ("cannot swap state with coroutine that has no saved state");	2411	croak ("cannot swap state with coroutine that has no saved state,");
1932	else	2412	else
1933	{	2413	{
1934	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);	2414	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1935	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;	2415	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1936		2416
…		…
1961		2441
1962	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2442	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1963	coro_ready[i] = newAV ();	2443	coro_ready[i] = newAV ();
1964		2444
1965	{	2445	{
1966	SV *sv = perl_get_sv ("Coro::API", TRUE);	2446	SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1967	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1968		2447
1969	coroapi.schedule = api_schedule;	2448	coroapi.schedule = api_schedule;
1970	coroapi.cede = api_cede;	2449	coroapi.cede = api_cede;
1971	coroapi.cede_notself = api_cede_notself;	2450	coroapi.cede_notself = api_cede_notself;
1972	coroapi.ready = api_ready;	2451	coroapi.ready = api_ready;
1973	coroapi.is_ready = api_is_ready;	2452	coroapi.is_ready = api_is_ready;
1974	coroapi.nready = &coro_nready;	2453	coroapi.nready = coro_nready;
1975	coroapi.current = coro_current;	2454	coroapi.current = coro_current;
1976		2455
1977	GCoroAPI = &coroapi;	2456	GCoroAPI = &coroapi;
1978	sv_setiv (sv, (IV)&coroapi);	2457	sv_setiv (sv, (IV)&coroapi);
1979	SvREADONLY_on (sv);	2458	SvREADONLY_on (sv);
1980	}	2459	}
1981	}	2460	}
		2461
		2462	void
		2463	schedule (...)
		2464	CODE:
		2465	CORO_EXECUTE_SLF_XS (slf_init_schedule);
		2466
		2467	void
		2468	cede (...)
		2469	CODE:
		2470	CORO_EXECUTE_SLF_XS (slf_init_cede);
		2471
		2472	void
		2473	cede_notself (...)
		2474	CODE:
		2475	CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1982		2476
1983	void	2477	void
1984	_set_current (SV *current)	2478	_set_current (SV *current)
1985	PROTOTYPE: $	2479	PROTOTYPE: $
1986	CODE:	2480	CODE:
1987	SvREFCNT_dec (SvRV (coro_current));	2481	SvREFCNT_dec (SvRV (coro_current));
1988	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	2482	SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1989		2483
1990	void	2484	void
1991	_set_readyhook (SV *hook)	2485	_set_readyhook (SV *hook)
1992	PROTOTYPE: $	2486	PROTOTYPE: $
1993	CODE:	2487	CODE:
1994	LOCK;
1995	SvREFCNT_dec (coro_readyhook);	2488	SvREFCNT_dec (coro_readyhook);
1996	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;	2489	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1997	UNLOCK;
1998		2490
1999	int	2491	int
2000	prio (Coro::State coro, int newprio = 0)	2492	prio (Coro::State coro, int newprio = 0)
		2493	PROTOTYPE: $;$
2001	ALIAS:	2494	ALIAS:
2002	nice = 1	2495	nice = 1
2003	CODE:	2496	CODE:
2004	{	2497	{
2005	RETVAL = coro->prio;	2498	RETVAL = coro->prio;
…		…
2020		2513
2021	SV *	2514	SV *
2022	ready (SV *self)	2515	ready (SV *self)
2023	PROTOTYPE: $	2516	PROTOTYPE: $
2024	CODE:	2517	CODE:
2025	RETVAL = boolSV (api_ready (self));	2518	RETVAL = boolSV (api_ready (aTHX_ self));
2026	OUTPUT:	2519	OUTPUT:
2027	RETVAL	2520	RETVAL
2028		2521
2029	int	2522	int
2030	nready (...)	2523	nready (...)
…		…
2037	# for async_pool speedup	2530	# for async_pool speedup
2038	void	2531	void
2039	_pool_1 (SV *cb)	2532	_pool_1 (SV *cb)
2040	CODE:	2533	CODE:
2041	{	2534	{
2042	struct coro *coro = SvSTATE (coro_current);
2043	HV *hv = (HV *)SvRV (coro_current);	2535	HV *hv = (HV *)SvRV (coro_current);
		2536	struct coro *coro = SvSTATE_hv ((SV *)hv);
2044	AV *defav = GvAV (PL_defgv);	2537	AV *defav = GvAV (PL_defgv);
2045	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	2538	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2046	AV *invoke_av;	2539	AV *invoke_av;
2047	int i, len;	2540	int i, len;
2048		2541
…		…
2053	SvREFCNT_dec (old);	2546	SvREFCNT_dec (old);
2054	croak ("\3async_pool terminate\2\n");	2547	croak ("\3async_pool terminate\2\n");
2055	}	2548	}
2056		2549
2057	SvREFCNT_dec (coro->saved_deffh);	2550	SvREFCNT_dec (coro->saved_deffh);
2058	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);	2551	coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2059		2552
2060	hv_store (hv, "desc", sizeof ("desc") - 1,	2553	hv_store (hv, "desc", sizeof ("desc") - 1,
2061	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);	2554	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2062		2555
2063	invoke_av = (AV *)SvRV (invoke);	2556	invoke_av = (AV *)SvRV (invoke);
…		…
2067		2560
2068	if (len > 0)	2561	if (len > 0)
2069	{	2562	{
2070	av_fill (defav, len - 1);	2563	av_fill (defav, len - 1);
2071	for (i = 0; i < len; ++i)	2564	for (i = 0; i < len; ++i)
2072	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));	2565	av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2073	}	2566	}
2074
2075	SvREFCNT_dec (invoke);
2076	}	2567	}
2077		2568
2078	void	2569	void
2079	_pool_2 (SV *cb)	2570	_pool_2 (SV *cb)
2080	CODE:	2571	CODE:
2081	{	2572	{
2082	struct coro *coro = SvSTATE (coro_current);	2573	struct coro *coro = SvSTATE_current;
2083		2574
2084	sv_setsv (cb, &PL_sv_undef);	2575	sv_setsv (cb, &PL_sv_undef);
2085		2576
2086	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;	2577	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2087	coro->saved_deffh = 0;	2578	coro->saved_deffh = 0;
2088		2579
2089	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	2580	if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2090	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	2581	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2091	{	2582	{
2092	SV *old = PL_diehook;	2583	SV *old = PL_diehook;
2093	PL_diehook = 0;	2584	PL_diehook = 0;
2094	SvREFCNT_dec (old);	2585	SvREFCNT_dec (old);
…		…
2100	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	2591	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2101		2592
2102	coro->prio = 0;	2593	coro->prio = 0;
2103		2594
2104	if (coro->cctx && (coro->cctx->flags & CC_TRACE))	2595	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2105	api_trace (coro_current, 0);	2596	api_trace (aTHX_ coro_current, 0);
2106		2597
2107	av_push (av_async_pool, newSVsv (coro_current));	2598	av_push (av_async_pool, newSVsv (coro_current));
2108	}	2599	}
2109		2600
2110	#if 0	2601
		2602	MODULE = Coro::State PACKAGE = Coro::AIO
2111		2603
2112	void	2604	void
2113	_generator_call (...)	2605	_get_state (SV *self)
2114	PROTOTYPE: @	2606	PROTOTYPE: $
2115	PPCODE:	2607	PPCODE:
2116	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2117	xxxx
2118	abort ();
2119
2120	SV *
2121	gensub (SV *sub, ...)
2122	PROTOTYPE: &;@
2123	CODE:
2124	{	2608	{
2125	struct coro *coro;	2609	AV *defav = GvAV (PL_defgv);
2126	MAGIC *mg;	2610	AV *av = newAV ();
2127	CV *xcv;
2128	CV *ncv = (CV *)newSV_type (SVt_PVCV);
2129	int i;	2611	int i;
2130
2131	CvGV (ncv) = CvGV (cv);
2132	CvFILE (ncv) = CvFILE (cv);
2133
2134	Newz (0, coro, 1, struct coro);
2135	coro->args = newAV ();
2136	coro->flags = CF_NEW;
2137
2138	av_extend (coro->args, items - 1);
2139	for (i = 1; i < items; i++)
2140	av_push (coro->args, newSVsv (ST (i)));
2141
2142	CvISXSUB_on (ncv);
2143	CvXSUBANY (ncv).any_ptr = (void *)coro;
2144
2145	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2146
2147	CvXSUB (ncv) = CvXSUB (xcv);
2148	CvANON_on (ncv);
2149
2150	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2151	RETVAL = newRV_noinc ((SV *)ncv);
2152	}
2153	OUTPUT:
2154	RETVAL
2155
2156	#endif
2157
2158
2159	MODULE = Coro::State PACKAGE = Coro::AIO
2160
2161	SV *
2162	_get_state ()
2163	CODE:
2164	{
2165	struct io_state *data;
2166
2167	RETVAL = newSV (sizeof (struct io_state));	2612	SV *data_sv = newSV (sizeof (struct io_state));
2168	data = (struct io_state *)SvPVX (RETVAL);	2613	struct io_state *data = (struct io_state *)SvPVX (data_sv);
2169	SvCUR_set (RETVAL, sizeof (struct io_state));	2614	SvCUR_set (data_sv, sizeof (struct io_state));
2170	SvPOK_only (RETVAL);	2615	SvPOK_only (data_sv);
2171		2616
2172	data->errorno = errno;	2617	data->errorno = errno;
2173	data->laststype = PL_laststype;	2618	data->laststype = PL_laststype;
2174	data->laststatval = PL_laststatval;	2619	data->laststatval = PL_laststatval;
2175	data->statcache = PL_statcache;	2620	data->statcache = PL_statcache;
		2621
		2622	av_extend (av, AvFILLp (defav) + 1 + 1);
		2623
		2624	for (i = 0; i <= AvFILLp (defav); ++i)
		2625	av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
		2626
		2627	av_push (av, data_sv);
		2628
		2629	XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		2630
		2631	api_ready (aTHX_ self);
2176	}	2632	}
2177	OUTPUT:
2178	RETVAL
2179		2633
2180	void	2634	void
2181	_set_state (char *data_)	2635	_set_state (SV *state)
2182	PROTOTYPE: $	2636	PROTOTYPE: $
2183	CODE:	2637	PPCODE:
2184	{	2638	{
2185	struct io_state *data = (void *)data_;	2639	AV *av = (AV *)SvRV (state);
		2640	struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
		2641	int i;
2186		2642
2187	errno = data->errorno;	2643	errno = data->errorno;
2188	PL_laststype = data->laststype;	2644	PL_laststype = data->laststype;
2189	PL_laststatval = data->laststatval;	2645	PL_laststatval = data->laststatval;
2190	PL_statcache = data->statcache;	2646	PL_statcache = data->statcache;
		2647
		2648	EXTEND (SP, AvFILLp (av));
		2649	for (i = 0; i < AvFILLp (av); ++i)
		2650	PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2191	}	2651	}
2192		2652
2193		2653
2194	MODULE = Coro::State PACKAGE = Coro::AnyEvent	2654	MODULE = Coro::State PACKAGE = Coro::AnyEvent
2195		2655
2196	BOOT:	2656	BOOT:
2197	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);	2657	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2198		2658
2199	SV *	2659	void
2200	_schedule (...)	2660	_schedule (...)
2201	PROTOTYPE: @
2202	CODE:	2661	CODE:
2203	{	2662	{
2204	static int incede;	2663	static int incede;
2205		2664
2206	api_cede_notself ();	2665	api_cede_notself (aTHX);
2207		2666
2208	++incede;	2667	++incede;
2209	while (coro_nready >= incede && api_cede ())	2668	while (coro_nready >= incede && api_cede (aTHX))
2210	;	2669	;
2211		2670
2212	sv_setsv (sv_activity, &PL_sv_undef);	2671	sv_setsv (sv_activity, &PL_sv_undef);
2213	if (coro_nready >= incede)	2672	if (coro_nready >= incede)
2214	{	2673	{
…		…
2219	}	2678	}
2220		2679
2221	--incede;	2680	--incede;
2222	}	2681	}
2223		2682
		2683
		2684	MODULE = Coro::State PACKAGE = PerlIO::cede
		2685
		2686	BOOT:
		2687	PerlIO_define_layer (aTHX_ &PerlIO_cede);
		2688
		2689	MODULE = Coro::State PACKAGE = Coro::Semaphore
		2690
		2691	SV *
		2692	new (SV *klass, SV *count_ = 0)
		2693	CODE:
		2694	{
		2695	/* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
		2696	AV *av = newAV ();
		2697	av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
		2698	RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
		2699	}
		2700	OUTPUT:
		2701	RETVAL
		2702
		2703	SV *
		2704	count (SV *self)
		2705	CODE:
		2706	RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
		2707	OUTPUT:
		2708	RETVAL
		2709
		2710	void
		2711	up (SV *self, int adjust = 1)
		2712	ALIAS:
		2713	adjust = 1
		2714	CODE:
		2715	coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
		2716
		2717	void
		2718	down (SV *self)
		2719	CODE:
		2720	CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
		2721
		2722	void
		2723	try (SV *self)
		2724	PPCODE:
		2725	{
		2726	AV *av = (AV *)SvRV (self);
		2727	SV *count_sv = AvARRAY (av)[0];
		2728	IV count = SvIVX (count_sv);
		2729
		2730	if (count > 0)
		2731	{
		2732	--count;
		2733	SvIVX (count_sv) = count;
		2734	XSRETURN_YES;
		2735	}
		2736	else
		2737	XSRETURN_NO;
		2738	}
		2739
		2740	void
		2741	waiters (SV *self)
		2742	CODE:
		2743	{
		2744	AV *av = (AV *)SvRV (self);
		2745
		2746	if (GIMME_V == G_SCALAR)
		2747	XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
		2748	else
		2749	{
		2750	int i;
		2751	EXTEND (SP, AvFILLp (av) + 1 - 1);
		2752	for (i = 1; i <= AvFILLp (av); ++i)
		2753	PUSHs (newSVsv (AvARRAY (av)[i]));
		2754	}
		2755	}
		2756

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