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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.120 by root, Sat Dec 2 18:01:30 2006 UTC vs.
Revision 1.164 by root, Tue Sep 25 01:47:23 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		37
77	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
79	* and should be unique. */	40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
80	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
82		97
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		99
85	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
87	#else	103	#else
88	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
89	#endif	106	#endif
90		107
91	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
92		109
93	#include "CoroAPI.h"	110	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		111
97	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	116	#else
102	# define LOCK (void)0	117	# define LOCK (void)0
103	# define UNLOCK (void)0	118	# define UNLOCK (void)0
104	#endif	119	#endif
105		120
		121	/* helper storage struct for Coro::AIO */
106	struct io_state	122	struct io_state
107	{	123	{
108	int errorno;	124	int errorno;
109	I32 laststype;	125	I32 laststype;
110	int laststatval;	126	int laststatval;
111	Stat_t statcache;	127	Stat_t statcache;
112	};	128	};
113		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
114	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
115	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
116	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
117	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
		136
		137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
118		141
119	static struct coro_cctx *cctx_first;	142	static struct coro_cctx *cctx_first;
120	static int cctx_count, cctx_idle;	143	static int cctx_count, cctx_idle;
121		144
122	/* this is a structure representing a c-level coroutine */	145	/* this is a structure representing a c-level coroutine */
123	typedef struct coro_cctx {	146	typedef struct coro_cctx {
124	struct coro_cctx *next;	147	struct coro_cctx *next;
125		148
126	/* the stack */	149	/* the stack */
127	void *sptr;	150	void *sptr;
128	long ssize; /* positive == mmap, otherwise malloc */	151	size_t ssize;
129		152
130	/* cpu state */	153	/* cpu state */
131	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	154	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		155	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
132	JMPENV *top_env;	156	JMPENV *top_env;
133	coro_context cctx;	157	coro_context cctx;
134		158
135	int inuse;
136
137	#if USE_VALGRIND	159	#if CORO_USE_VALGRIND
138	int valgrind_id;	160	int valgrind_id;
139	#endif	161	#endif
		162	char inuse, mapped;
140	} coro_cctx;	163	} coro_cctx;
141		164
142	enum {	165	enum {
143	CF_RUNNING = 0x0001, /* coroutine is running */	166	CF_RUNNING = 0x0001, /* coroutine is running */
144	CF_READY = 0x0002, /* coroutine is ready */	167	CF_READY = 0x0002, /* coroutine is ready */
145	CF_NEW = 0x0004, /* ahs never been switched to */	168	CF_NEW = 0x0004, /* has never been switched to */
		169	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
146	};	170	};
147		171
148	/* this is a structure representing a perl-level coroutine */	172	/* this is a structure representing a perl-level coroutine */
149	struct coro {	173	struct coro {
150	/* the c coroutine allocated to this perl coroutine, if any */	174	/* the c coroutine allocated to this perl coroutine, if any */
151	coro_cctx *cctx;	175	coro_cctx *cctx;
152		176
153	/* data associated with this coroutine (initial args) */	177	/* data associated with this coroutine (initial args) */
154	AV *args;	178	AV *args;
155	int refcnt;	179	int refcnt;
156	int flags;	180	int save; /* CORO_SAVE flags */
		181	int flags; /* CF_ flags */
157		182
158	/* optionally saved, might be zero */	183	/* optionally saved, might be zero */
159	AV *defav;	184	AV *defav; /* @_ */
160	SV *defsv;	185	SV *defsv; /* $_ */
161	SV *errsv;	186	SV *errsv; /* $@ */
		187	GV *deffh; /* default filehandle */
		188	SV *irssv; /* $/ */
		189	SV *irssv_sv; /* real $/ cache */
162		190
163	#define VAR(name,type) type name;	191	#define VAR(name,type) type name;
164	# include "state.h"	192	# include "state.h"
165	#undef VAR	193	#undef VAR
166		194
167	/* coro process data */	195	/* coro process data */
168	int prio;	196	int prio;
		197
		198	/* linked list */
		199	struct coro *next, *prev;
		200	HV *hv; /* the perl hash associated with this coro, if any */
169	};	201	};
170		202
171	typedef struct coro *Coro__State;	203	typedef struct coro *Coro__State;
172	typedef struct coro *Coro__State_or_hashref;	204	typedef struct coro *Coro__State_or_hashref;
173		205
		206	/** Coro ********************************************************************/
		207
		208	#define PRIO_MAX 3
		209	#define PRIO_HIGH 1
		210	#define PRIO_NORMAL 0
		211	#define PRIO_LOW -1
		212	#define PRIO_IDLE -3
		213	#define PRIO_MIN -4
		214
		215	/* for Coro.pm */
		216	static SV *coro_current;
		217	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		218	static int coro_nready;
		219	static struct coro *coro_first;
		220
		221	/** lowlevel stuff **********************************************************/
		222
174	static AV *	223	static AV *
175	coro_clone_padlist (CV *cv)	224	coro_clone_padlist (pTHX_ CV *cv)
176	{	225	{
177	AV *padlist = CvPADLIST (cv);	226	AV *padlist = CvPADLIST (cv);
178	AV *newpadlist, *newpad;	227	AV *newpadlist, *newpad;
179		228
180	newpadlist = newAV ();	229	newpadlist = newAV ();
…		…
192		241
193	return newpadlist;	242	return newpadlist;
194	}	243	}
195		244
196	static void	245	static void
197	free_padlist (AV *padlist)	246	free_padlist (pTHX_ AV *padlist)
198	{	247	{
199	/* may be during global destruction */	248	/* may be during global destruction */
200	if (SvREFCNT (padlist))	249	if (SvREFCNT (padlist))
201	{	250	{
202	I32 i = AvFILLp (padlist);	251	I32 i = AvFILLp (padlist);
…		…
223	AV *padlist;	272	AV *padlist;
224	AV *av = (AV *)mg->mg_obj;	273	AV *av = (AV *)mg->mg_obj;
225		274
226	/* casting is fun. */	275	/* casting is fun. */
227	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
228	free_padlist (padlist);	277	free_padlist (aTHX_ padlist);
229		278
230	SvREFCNT_dec (av);	279	SvREFCNT_dec (av);
231		280
232	return 0;	281	return 0;
233	}	282	}
…		…
243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	292	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
244	: 0	293	: 0
245		294
246	/* the next two functions merely cache the padlists */	295	/* the next two functions merely cache the padlists */
247	static void	296	static void
248	get_padlist (CV *cv)	297	get_padlist (pTHX_ CV *cv)
249	{	298	{
250	MAGIC *mg = CORO_MAGIC (cv);	299	MAGIC *mg = CORO_MAGIC (cv);
251	AV *av;	300	AV *av;
252		301
253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	302	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	303	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
255	else	304	else
256	{	305	{
257	#if 0	306	#if CORO_PREFER_PERL_FUNCTIONS
258	/* this is probably cleaner, but also slower? */	307	/* this is probably cleaner, but also slower? */
259	CV *cp = Perl_cv_clone (cv);	308	CV *cp = Perl_cv_clone (cv);
260	CvPADLIST (cv) = CvPADLIST (cp);	309	CvPADLIST (cv) = CvPADLIST (cp);
261	CvPADLIST (cp) = 0;	310	CvPADLIST (cp) = 0;
262	SvREFCNT_dec (cp);	311	SvREFCNT_dec (cp);
263	#else	312	#else
264	CvPADLIST (cv) = coro_clone_padlist (cv);	313	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
265	#endif	314	#endif
266	}	315	}
267	}	316	}
268		317
269	static void	318	static void
270	put_padlist (CV *cv)	319	put_padlist (pTHX_ CV *cv)
271	{	320	{
272	MAGIC *mg = CORO_MAGIC (cv);	321	MAGIC *mg = CORO_MAGIC (cv);
273	AV *av;	322	AV *av;
274		323
275	if (!mg)	324	if (!mg)
…		…
286	av_extend (av, AvMAX (av) + 1);	335	av_extend (av, AvMAX (av) + 1);
287		336
288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	337	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
289	}	338	}
290		339
		340	/** load & save, init *******************************************************/
		341
291	#define SB do {	342	#define SB do {
292	#define SE } while (0)	343	#define SE } while (0)
293		344
294	#define LOAD(state) load_state ((state))
295	#define SAVE(state,flags) save_state ((state),(flags))
296
297	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE	345	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
298		346
299	static void	347	static void
300	load_state (Coro__State c)	348	load_perl (pTHX_ Coro__State c)
301	{	349	{
302	#define VAR(name,type) PL_ ## name = c->name;	350	#define VAR(name,type) PL_ ## name = c->name;
303	# include "state.h"	351	# include "state.h"
304	#undef VAR	352	#undef VAR
305		353
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	354	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	355	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	356	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		357	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		358
		359	if (c->irssv)
		360	{
		361	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		362	{
		363	SvREFCNT_dec (c->irssv);
		364	c->irssv = 0;
		365	}
		366	else
		367	{
		368	REPLACE_SV (PL_rs, c->irssv);
		369	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		370	sv_setsv (c->irssv_sv, PL_rs);
		371	}
		372	}
309		373
310	{	374	{
311	dSP;	375	dSP;
312	CV *cv;	376	CV *cv;
313		377
314	/* now do the ugly restore mess */	378	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	379	while ((cv = (CV *)POPs))
316	{	380	{
317	put_padlist (cv); /* mark this padlist as available */	381	put_padlist (aTHX_ cv); /* mark this padlist as available */
318	CvDEPTH (cv) = PTR2IV (POPs);	382	CvDEPTH (cv) = PTR2IV (POPs);
319	CvPADLIST (cv) = (AV *)POPs;	383	CvPADLIST (cv) = (AV *)POPs;
320	}	384	}
321		385
322	PUTBACK;	386	PUTBACK;
323	}	387	}
324	}	388	}
325		389
326	static void	390	static void
327	save_state (Coro__State c, int flags)	391	save_perl (pTHX_ Coro__State c)
328	{	392	{
329	{	393	{
330	dSP;	394	dSP;
331	I32 cxix = cxstack_ix;	395	I32 cxix = cxstack_ix;
332	PERL_CONTEXT *ccstk = cxstack;	396	PERL_CONTEXT *ccstk = cxstack;
…		…
335	/*	399	/*
336	* the worst thing you can imagine happens first - we have to save	400	* the worst thing you can imagine happens first - we have to save
337	* (and reinitialize) all cv's in the whole callchain :(	401	* (and reinitialize) all cv's in the whole callchain :(
338	*/	402	*/
339		403
340	PUSHs (Nullsv);	404	XPUSHs (Nullsv);
341	/* this loop was inspired by pp_caller */	405	/* this loop was inspired by pp_caller */
342	for (;;)	406	for (;;)
343	{	407	{
344	while (cxix >= 0)	408	while (cxix >= 0)
345	{	409	{
346	PERL_CONTEXT *cx = &ccstk[cxix--];	410	PERL_CONTEXT *cx = &ccstk[cxix--];
347		411
348	if (CxTYPE (cx) == CXt_SUB)	412	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
349	{	413	{
350	CV *cv = cx->blk_sub.cv;	414	CV *cv = cx->blk_sub.cv;
351		415
352	if (CvDEPTH (cv))	416	if (CvDEPTH (cv))
353	{	417	{
354	EXTEND (SP, 3);	418	EXTEND (SP, 3);
355
356	PUSHs ((SV *)CvPADLIST (cv));	419	PUSHs ((SV *)CvPADLIST (cv));
357	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	420	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
358	PUSHs ((SV *)cv);	421	PUSHs ((SV *)cv);
359		422
360	CvDEPTH (cv) = 0;	423	CvDEPTH (cv) = 0;
361	get_padlist (cv);	424	get_padlist (aTHX_ cv);
362	}	425	}
363	}	426	}
364	#ifdef CXt_FORMAT
365	else if (CxTYPE (cx) == CXt_FORMAT)
366	{
367	/* I never used formats, so how should I know how these are implemented? */
368	/* my bold guess is as a simple, plain sub... */
369	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
370	}
371	#endif
372	}	427	}
373		428
374	if (top_si->si_type == PERLSI_MAIN)	429	if (top_si->si_type == PERLSI_MAIN)
375	break;	430	break;
376		431
377	top_si = top_si->si_prev;	432	top_si = top_si->si_prev;
378	ccstk = top_si->si_cxstack;	433	ccstk = top_si->si_cxstack;
379	cxix = top_si->si_cxix;	434	cxix = top_si->si_cxix;
380	}	435	}
381		436
382	PUTBACK;	437	PUTBACK;
383	}	438	}
384		439
385	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	440	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
386	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	441	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
387	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	442	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		443	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		444	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
388		445
389	#define VAR(name,type)c->name = PL_ ## name;	446	#define VAR(name,type)c->name = PL_ ## name;
390	# include "state.h"	447	# include "state.h"
391	#undef VAR	448	#undef VAR
392	}	449	}
…		…
395	* allocate various perl stacks. This is an exact copy	452	* allocate various perl stacks. This is an exact copy
396	* of perl.c:init_stacks, except that it uses less memory	453	* of perl.c:init_stacks, except that it uses less memory
397	* on the (sometimes correct) assumption that coroutines do	454	* on the (sometimes correct) assumption that coroutines do
398	* not usually need a lot of stackspace.	455	* not usually need a lot of stackspace.
399	*/	456	*/
		457	#if CORO_PREFER_PERL_FUNCTIONS
		458	# define coro_init_stacks init_stacks
		459	#else
400	static void	460	static void
401	coro_init_stacks ()	461	coro_init_stacks (pTHX)
402	{	462	{
403	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	463	PL_curstackinfo = new_stackinfo(64, 6);
404	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
405	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
406	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
407		467
408	PL_stack_base = AvARRAY(PL_curstack);	468	PL_stack_base = AvARRAY(PL_curstack);
409	PL_stack_sp = PL_stack_base;	469	PL_stack_sp = PL_stack_base;
410	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
411		471
412	New(50,PL_tmps_stack,128,SV*);	472	New(50,PL_tmps_stack,64,SV*);
413	PL_tmps_floor = -1;	473	PL_tmps_floor = -1;
414	PL_tmps_ix = -1;	474	PL_tmps_ix = -1;
415	PL_tmps_max = 128;	475	PL_tmps_max = 64;
416		476
417	New(54,PL_markstack,32,I32);	477	New(54,PL_markstack,16,I32);
418	PL_markstack_ptr = PL_markstack;	478	PL_markstack_ptr = PL_markstack;
419	PL_markstack_max = PL_markstack + 32;	479	PL_markstack_max = PL_markstack + 16;
420		480
421	#ifdef SET_MARK_OFFSET	481	#ifdef SET_MARK_OFFSET
422	SET_MARK_OFFSET;	482	SET_MARK_OFFSET;
423	#endif	483	#endif
424		484
425	New(54,PL_scopestack,32,I32);	485	New(54,PL_scopestack,16,I32);
426	PL_scopestack_ix = 0;	486	PL_scopestack_ix = 0;
427	PL_scopestack_max = 32;	487	PL_scopestack_max = 16;
428		488
429	New(54,PL_savestack,64,ANY);	489	New(54,PL_savestack,64,ANY);
430	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
431	PL_savestack_max = 64;	491	PL_savestack_max = 64;
432		492
433	#if !PERL_VERSION_ATLEAST (5,9,0)	493	#if !PERL_VERSION_ATLEAST (5,9,0)
434	New(54,PL_retstack,16,OP*);	494	New(54,PL_retstack,4,OP*);
435	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
436	PL_retstack_max = 16;	496	PL_retstack_max = 4;
437	#endif	497	#endif
438	}	498	}
		499	#endif
439		500
440	/*	501	/*
441	* destroy the stacks, the callchain etc...	502	* destroy the stacks, the callchain etc...
442	*/	503	*/
443	static void	504	static void
444	coro_destroy_stacks ()	505	coro_destroy_stacks (pTHX)
445	{	506	{
446	if (!IN_DESTRUCT)	507	if (!IN_DESTRUCT)
447	{	508	{
448	/* is this ugly, I ask? */	509	/* restore all saved variables and stuff */
449	LEAVE_SCOPE (0);	510	LEAVE_SCOPE (0);
		511	assert (PL_tmps_floor == -1);
450		512
451	/* sure it is, but more important: is it correct?? :/ */	513	/* free all temporaries */
452	FREETMPS;	514	FREETMPS;
		515	assert (PL_tmps_ix == -1);
453		516
		517	/* unwind all extra stacks */
454	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	518	POPSTACK_TO (PL_mainstack);
		519
		520	/* unwind main stack */
		521	dounwind (-1);
455	}	522	}
456		523
457	while (PL_curstackinfo->si_next)	524	while (PL_curstackinfo->si_next)
458	PL_curstackinfo = PL_curstackinfo->si_next;	525	PL_curstackinfo = PL_curstackinfo->si_next;
459		526
460	while (PL_curstackinfo)	527	while (PL_curstackinfo)
461	{	528	{
462	PERL_SI *p = PL_curstackinfo->si_prev;	529	PERL_SI *p = PL_curstackinfo->si_prev;
463		530
464	{ /*D*//*remove*/
465	dSP;
466	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
467	PUTBACK; /* possibly superfluous */
468	}
469
470	if (!IN_DESTRUCT)	531	if (!IN_DESTRUCT)
471	{
472	dounwind (-1);/*D*//*remove*/
473	SvREFCNT_dec (PL_curstackinfo->si_stack);	532	SvREFCNT_dec (PL_curstackinfo->si_stack);
474	}
475		533
476	Safefree (PL_curstackinfo->si_cxstack);	534	Safefree (PL_curstackinfo->si_cxstack);
477	Safefree (PL_curstackinfo);	535	Safefree (PL_curstackinfo);
478	PL_curstackinfo = p;	536	PL_curstackinfo = p;
479	}	537	}
…		…
485	#if !PERL_VERSION_ATLEAST (5,9,0)	543	#if !PERL_VERSION_ATLEAST (5,9,0)
486	Safefree (PL_retstack);	544	Safefree (PL_retstack);
487	#endif	545	#endif
488	}	546	}
489		547
		548	static size_t
		549	coro_rss (struct coro *coro)
		550	{
		551	size_t rss = sizeof (coro);
		552
		553	if (coro->mainstack)
		554	{
		555	if (coro->flags & CF_RUNNING)
		556	{
		557	#define VAR(name,type)coro->name = PL_ ## name;
		558	# include "state.h"
		559	#undef VAR
		560	}
		561
		562	rss += sizeof (coro->curstackinfo);
		563	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		564	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		565	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		566	rss += coro->tmps_max * sizeof (SV *);
		567	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		568	rss += coro->scopestack_max * sizeof (I32);
		569	rss += coro->savestack_max * sizeof (ANY);
		570
		571	#if !PERL_VERSION_ATLEAST (5,9,0)
		572	rss += coro->retstack_max * sizeof (OP *);
		573	#endif
		574	}
		575
		576	return rss;
		577	}
		578
		579	/** coroutine stack handling ************************************************/
		580
490	static void	581	static void
491	setup_coro (struct coro *coro)	582	setup_coro (pTHX_ struct coro *coro)
492	{	583	{
493	/*	584	/*
494	* emulate part of the perl startup here.	585	* emulate part of the perl startup here.
495	*/	586	*/
496
497	coro_init_stacks ();	587	coro_init_stacks (aTHX);
498		588
499	PL_curcop = &PL_compiling;	589	PL_curcop = &PL_compiling;
500	PL_in_eval = EVAL_NULL;	590	PL_in_eval = EVAL_NULL;
		591	PL_comppad = 0;
501	PL_curpm = 0;	592	PL_curpm = 0;
502	PL_localizing = 0;	593	PL_localizing = 0;
503	PL_dirty = 0;	594	PL_dirty = 0;
504	PL_restartop = 0;	595	PL_restartop = 0;
505		596
…		…
513	Zero (&myop, 1, LOGOP);	604	Zero (&myop, 1, LOGOP);
514	myop.op_next = Nullop;	605	myop.op_next = Nullop;
515	myop.op_flags = OPf_WANT_VOID;	606	myop.op_flags = OPf_WANT_VOID;
516		607
517	PUSHMARK (SP);	608	PUSHMARK (SP);
518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	609	XPUSHs (av_shift (GvAV (PL_defgv)));
519	PUTBACK;	610	PUTBACK;
520	PL_op = (OP *)&myop;	611	PL_op = (OP *)&myop;
521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	612	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
522	SPAGAIN;	613	SPAGAIN;
523	}	614	}
524		615
525	ENTER; /* necessary e.g. for dounwind */	616	ENTER; /* necessary e.g. for dounwind */
526	}	617	}
527		618
528	static void	619	static void
529	free_coro_mortal ()	620	free_coro_mortal (pTHX)
530	{	621	{
531	if (coro_mortal)	622	if (coro_mortal)
532	{	623	{
533	SvREFCNT_dec (coro_mortal);	624	SvREFCNT_dec (coro_mortal);
534	coro_mortal = 0;	625	coro_mortal = 0;
535	}	626	}
536	}	627	}
537		628
538	/* inject a fake call to Coro::State::_cctx_init into the execution */	629	/* inject a fake call to Coro::State::_cctx_init into the execution */
		630	/* _cctx_init should be careful, as it could be called at almost any time */
		631	/* during execution of a perl program */
539	static void NOINLINE	632	static void NOINLINE
540	prepare_cctx (coro_cctx *cctx)	633	prepare_cctx (pTHX_ coro_cctx *cctx)
541	{	634	{
542	dSP;	635	dSP;
543	LOGOP myop;	636	LOGOP myop;
544		637
545	Zero (&myop, 1, LOGOP);	638	Zero (&myop, 1, LOGOP);
…		…
554	PL_op = (OP *)&myop;	647	PL_op = (OP *)&myop;
555	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
556	SPAGAIN;	649	SPAGAIN;
557	}	650	}
558		651
		652	/*
		653	* this is a _very_ stripped down perl interpreter ;)
		654	*/
559	static void	655	static void
560	coro_run (void *arg)	656	coro_run (void *arg)
561	{	657	{
		658	dTHX;
		659
562	/* coro_run is the alternative tail of transfer(), so unlock here. */	660	/* coro_run is the alternative tail of transfer(), so unlock here. */
563	UNLOCK;	661	UNLOCK;
564		662
565	/*
566	* this is a _very_ stripped down perl interpreter ;)
567	*/
568	PL_top_env = &PL_start_env;	663	PL_top_env = &PL_start_env;
569		664
570	/* inject call to cctx_init */	665	/* inject a fake subroutine call to cctx_init */
571	prepare_cctx ((coro_cctx *)arg);	666	prepare_cctx (aTHX_ (coro_cctx *)arg);
572		667
573	/* somebody will hit me for both perl_run and PL_restartop */	668	/* somebody or something will hit me for both perl_run and PL_restartop */
574	PL_restartop = PL_op;	669	PL_restartop = PL_op;
575	perl_run (PL_curinterp);	670	perl_run (PL_curinterp);
576		671
577	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	672	/*
578	abort ();	673	* If perl-run returns we assume exit() was being called or the coro
		674	* fell off the end, which seems to be the only valid (non-bug)
		675	* reason for perl_run to return. We try to exit by jumping to the
		676	* bootstrap-time "top" top_env, as we cannot restore the "main"
		677	* coroutine as Coro has no such concept
		678	*/
		679	PL_top_env = main_top_env;
		680	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
579	}	681	}
580		682
581	static coro_cctx *	683	static coro_cctx *
582	cctx_new ()	684	cctx_new ()
583	{	685	{
584	coro_cctx *cctx;	686	coro_cctx *cctx;
		687	void *stack_start;
		688	size_t stack_size;
585		689
586	++cctx_count;	690	++cctx_count;
587		691
588	New (0, cctx, 1, coro_cctx);	692	Newz (0, cctx, 1, coro_cctx);
589		693
590	#if HAVE_MMAP	694	#if HAVE_MMAP
591		695
592	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	696	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
593	/* mmap supposedly does allocate-on-write for us */	697	/* mmap supposedly does allocate-on-write for us */
594	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	698	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
595		699
596	if (cctx->sptr == (void *)-1)	700	if (cctx->sptr != (void *)-1)
597	{
598	perror ("FATAL: unable to mmap stack for coroutine");
599	_exit (EXIT_FAILURE);
600	}	701	{
601
602	# if STACKGUARD	702	# if CORO_STACKGUARD
603	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	703	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
604	# endif	704	# endif
		705	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		706	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		707	cctx->mapped = 1;
		708	}
		709	else
		710	#endif
		711	{
		712	cctx->ssize = coro_stacksize * (long)sizeof (long);
		713	New (0, cctx->sptr, coro_stacksize, long);
605		714
606	#else
607
608	cctx->ssize = STACKSIZE * (long)sizeof (long);
609	New (0, cctx->sptr, STACKSIZE, long);
610
611	if (!cctx->sptr)	715	if (!cctx->sptr)
612	{	716	{
613	perror ("FATAL: unable to malloc stack for coroutine");	717	perror ("FATAL: unable to allocate stack for coroutine");
614	_exit (EXIT_FAILURE);	718	_exit (EXIT_FAILURE);
615	}	719	}
616		720
617	#endif	721	stack_start = cctx->sptr;
		722	stack_size = cctx->ssize;
		723	}
618		724
619	#if USE_VALGRIND	725	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
620	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
621	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
622	cctx->ssize + (char *)cctx->sptr
623	);
624	#endif
625
626	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	726	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
627		727
628	return cctx;	728	return cctx;
629	}	729	}
630		730
631	static void	731	static void
…		…
634	if (!cctx)	734	if (!cctx)
635	return;	735	return;
636		736
637	--cctx_count;	737	--cctx_count;
638		738
639	#if USE_VALGRIND	739	#if CORO_USE_VALGRIND
640	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	740	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
641	#endif	741	#endif
642		742
643	#if HAVE_MMAP	743	#if HAVE_MMAP
		744	if (cctx->mapped)
644	munmap (cctx->sptr, cctx->ssize);	745	munmap (cctx->sptr, cctx->ssize);
645	#else	746	else
		747	#endif
646	Safefree (cctx->sptr);	748	Safefree (cctx->sptr);
647	#endif
648		749
649	Safefree (cctx);	750	Safefree (cctx);
650	}	751	}
651		752
652	static coro_cctx *	753	static coro_cctx *
653	cctx_get ()	754	cctx_get (pTHX)
654	{	755	{
655	coro_cctx *cctx;
656
657	if (cctx_first)	756	while (cctx_first)
658	{	757	{
659	cctx = cctx_first;	758	coro_cctx *cctx = cctx_first;
660	cctx_first = cctx->next;	759	cctx_first = cctx->next;
661	--cctx_idle;	760	--cctx_idle;
		761
		762	if (cctx->ssize >= coro_stacksize)
		763	return cctx;
		764
		765	cctx_destroy (cctx);
662	}	766	}
663	else	767
664	{
665	cctx = cctx_new ();
666	PL_op = PL_op->op_next;	768	PL_op = PL_op->op_next;
667	}
668
669	return cctx;	769	return cctx_new ();
670	}	770	}
671		771
672	static void	772	static void
673	cctx_put (coro_cctx *cctx)	773	cctx_put (coro_cctx *cctx)
674	{	774	{
…		…
686	++cctx_idle;	786	++cctx_idle;
687	cctx->next = cctx_first;	787	cctx->next = cctx_first;
688	cctx_first = cctx;	788	cctx_first = cctx;
689	}	789	}
690		790
		791	/** coroutine switching *****************************************************/
		792
691	/* never call directly, always through the coro_state_transfer global variable */	793	/* never call directly, always through the coro_state_transfer global variable */
692	static void NOINLINE	794	static void NOINLINE
693	transfer (struct coro *prev, struct coro *next, int flags)	795	transfer (pTHX_ struct coro *prev, struct coro *next)
694	{	796	{
695	dSTACKLEVEL;	797	dSTACKLEVEL;
696		798
697	/* sometimes transfer is only called to set idle_sp */	799	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	800	if (!next)
		801	{
699	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	802	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		803	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		804	}
700	else if (prev != next)	805	else if (prev != next)
701	{	806	{
702	coro_cctx *prev__cctx;	807	coro_cctx *prev__cctx;
703		808
704	if (prev->flags & CF_NEW)	809	if (prev->flags & CF_NEW)
…		…
715	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	820	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
716		821
717	if (next->flags & CF_RUNNING)	822	if (next->flags & CF_RUNNING)
718	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	823	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
719		824
		825	if (next->flags & CF_DESTROYED)
		826	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		827
720	prev->flags &= ~CF_RUNNING;	828	prev->flags &= ~CF_RUNNING;
721	next->flags |= CF_RUNNING;	829	next->flags |= CF_RUNNING;
722		830
723	LOCK;	831	LOCK;
724		832
725	if (next->flags & CF_NEW)	833	if (next->flags & CF_NEW)
726	{	834	{
727	/* need to start coroutine */	835	/* need to start coroutine */
728	next->flags &= ~CF_NEW;	836	next->flags &= ~CF_NEW;
729	/* first get rid of the old state */	837	/* first get rid of the old state */
730	SAVE (prev, -1);	838	save_perl (aTHX_ prev);
731	/* setup coroutine call */	839	/* setup coroutine call */
732	setup_coro (next);	840	setup_coro (aTHX_ next);
733	/* need a new stack */	841	/* need a new stack */
734	assert (!next->stack);	842	assert (!next->cctx);
735	}	843	}
736	else	844	else
737	{	845	{
738	/* coroutine already started */	846	/* coroutine already started */
739	SAVE (prev, flags);	847	save_perl (aTHX_ prev);
740	LOAD (next);	848	load_perl (aTHX_ next);
741	}	849	}
742		850
743	prev__cctx = prev->cctx;	851	prev__cctx = prev->cctx;
744		852
745	/* possibly "free" the cctx */	853	/* possibly "free" the cctx */
746	if (prev__cctx->idle_sp == STACKLEVEL)	854	if (prev__cctx->idle_sp == STACKLEVEL)
747	{	855	{
748	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	856	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
749	assert (PL_top_env == prev__cctx->top_env);	857	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
750		858
751	prev->cctx = 0;	859	prev->cctx = 0;
752		860
753	cctx_put (prev__cctx);	861	cctx_put (prev__cctx);
754	prev__cctx->inuse = 0;	862	prev__cctx->inuse = 0;
755	}	863	}
756		864
757	if (!next->cctx)	865	if (!next->cctx)
758	{	866	{
759	next->cctx = cctx_get ();	867	next->cctx = cctx_get (aTHX);
760	assert (!next->cctx->inuse);	868	assert (!next->cctx->inuse);
761	next->cctx->inuse = 1;	869	next->cctx->inuse = 1;
762	}	870	}
763		871
764	if (prev__cctx != next->cctx)	872	if (prev__cctx != next->cctx)
…		…
766	prev__cctx->top_env = PL_top_env;	874	prev__cctx->top_env = PL_top_env;
767	PL_top_env = next->cctx->top_env;	875	PL_top_env = next->cctx->top_env;
768	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	876	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
769	}	877	}
770		878
771	free_coro_mortal ();	879	free_coro_mortal (aTHX);
772
773	UNLOCK;	880	UNLOCK;
774	}	881	}
775	}	882	}
776		883
777	struct transfer_args	884	struct transfer_args
778	{	885	{
779	struct coro *prev, *next;	886	struct coro *prev, *next;
780	int flags;
781	};	887	};
782		888
783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	889	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
784		890
		891	/** high level stuff ********************************************************/
		892
785	static void	893	static int
786	coro_state_destroy (struct coro *coro)	894	coro_state_destroy (pTHX_ struct coro *coro)
787	{	895	{
788	if (coro->refcnt--)	896	if (coro->flags & CF_DESTROYED)
789	return;	897	return 0;
		898
		899	coro->flags |= CF_DESTROYED;
		900
		901	if (coro->flags & CF_READY)
		902	{
		903	/* reduce nready, as destroying a ready coro effectively unreadies it */
		904	/* alternative: look through all ready queues and remove the coro */
		905	LOCK;
		906	--coro_nready;
		907	UNLOCK;
		908	}
		909	else
		910	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		911
791	if (coro->mainstack && coro->mainstack != main_mainstack)	912	if (coro->mainstack && coro->mainstack != main_mainstack)
792	{	913	{
793	struct coro temp;	914	struct coro temp;
		915
		916	assert (!(coro->flags & CF_RUNNING));
		917
		918	Zero (&temp, 1, struct coro);
		919	temp.save = CORO_SAVE_ALL;
794		920
795	if (coro->flags & CF_RUNNING)	921	if (coro->flags & CF_RUNNING)
796	croak ("FATAL: tried to destroy currently running coroutine");	922	croak ("FATAL: tried to destroy currently running coroutine");
797		923
798	SAVE ((&temp), TRANSFER_SAVE_ALL);	924	save_perl (aTHX_ &temp);
799	LOAD (coro);	925	load_perl (aTHX_ coro);
800		926
801	coro_destroy_stacks ();	927	coro_destroy_stacks (aTHX);
802		928
803	LOAD ((&temp)); /* this will get rid of defsv etc.. */	929	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
804		930
805	coro->mainstack = 0;	931	coro->mainstack = 0;
806	}	932	}
807		933
808	cctx_destroy (coro->cctx);	934	cctx_destroy (coro->cctx);
809	SvREFCNT_dec (coro->args);	935	SvREFCNT_dec (coro->args);
810	Safefree (coro);	936
		937	if (coro->next) coro->next->prev = coro->prev;
		938	if (coro->prev) coro->prev->next = coro->next;
		939	if (coro == coro_first) coro_first = coro->next;
		940
		941	return 1;
811	}	942	}
812		943
813	static int	944	static int
814	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	945	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
815	{	946	{
816	struct coro *coro = (struct coro *)mg->mg_ptr;	947	struct coro *coro = (struct coro *)mg->mg_ptr;
817	mg->mg_ptr = 0;	948	mg->mg_ptr = 0;
818		949
		950	coro->hv = 0;
		951
		952	if (--coro->refcnt < 0)
		953	{
819	coro_state_destroy (coro);	954	coro_state_destroy (aTHX_ coro);
		955	Safefree (coro);
		956	}
820		957
821	return 0;	958	return 0;
822	}	959	}
823		960
824	static int	961	static int
…		…
831	return 0;	968	return 0;
832	}	969	}
833		970
834	static MGVTBL coro_state_vtbl = {	971	static MGVTBL coro_state_vtbl = {
835	0, 0, 0, 0,	972	0, 0, 0, 0,
836	coro_state_clear,	973	coro_state_free,
837	0,	974	0,
838	#ifdef MGf_DUP	975	#ifdef MGf_DUP
839	coro_state_dup,	976	coro_state_dup,
840	#else	977	#else
841	# define MGf_DUP 0	978	# define MGf_DUP 0
842	#endif	979	#endif
843	};	980	};
844		981
845	static struct coro *	982	static struct coro *
846	SvSTATE (SV *coro)	983	SvSTATE_ (pTHX_ SV *coro)
847	{	984	{
848	HV *stash;	985	HV *stash;
849	MAGIC *mg;	986	MAGIC *mg;
850		987
851	if (SvROK (coro))	988	if (SvROK (coro))
…		…
857	/* very slow, but rare, check */	994	/* very slow, but rare, check */
858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	995	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859	croak ("Coro::State object required");	996	croak ("Coro::State object required");
860	}	997	}
861		998
862	mg = SvMAGIC (coro);	999	mg = CORO_MAGIC (coro);
863	assert (mg->mg_type == PERL_MAGIC_ext);
864	return (struct coro *)mg->mg_ptr;	1000	return (struct coro *)mg->mg_ptr;
865	}	1001	}
866		1002
		1003	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1004
867	static void	1005	static void
868	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1006	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
869	{	1007	{
870	ta->prev = SvSTATE (prev);	1008	ta->prev = SvSTATE (prev_sv);
871	ta->next = SvSTATE (next);	1009	ta->next = SvSTATE (next_sv);
872	ta->flags = flags;
873	}	1010	}
874		1011
875	static void	1012	static void
876	api_transfer (SV *prev, SV *next, int flags)	1013	api_transfer (SV *prev_sv, SV *next_sv)
877	{	1014	{
		1015	dTHX;
878	struct transfer_args ta;	1016	struct transfer_args ta;
879		1017
880	prepare_transfer (&ta, prev, next, flags);	1018	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	1019	TRANSFER (ta);
882	}	1020	}
883		1021
		1022	static int
		1023	api_save (SV *coro_sv, int new_save)
		1024	{
		1025	dTHX;
		1026	struct coro *coro = SvSTATE (coro_sv);
		1027	int old_save = coro->save;
		1028
		1029	if (new_save >= 0)
		1030	coro->save = new_save;
		1031
		1032	return old_save;
		1033	}
		1034
884	/** Coro ********************************************************************/	1035	/** Coro ********************************************************************/
885		1036
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static SV *coro_current;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	1037	static void
899	coro_enq (SV *coro_sv)	1038	coro_enq (pTHX_ SV *coro_sv)
900	{	1039	{
901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1040	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
902	coro_nready++;
903	}	1041	}
904		1042
905	static SV *	1043	static SV *
906	coro_deq (int min_prio)	1044	coro_deq (pTHX_ int min_prio)
907	{	1045	{
908	int prio = PRIO_MAX - PRIO_MIN;	1046	int prio = PRIO_MAX - PRIO_MIN;
909		1047
910	min_prio -= PRIO_MIN;	1048	min_prio -= PRIO_MIN;
911	if (min_prio < 0)	1049	if (min_prio < 0)
912	min_prio = 0;	1050	min_prio = 0;
913		1051
914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1052	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
915	if (AvFILLp (coro_ready [prio]) >= 0)	1053	if (AvFILLp (coro_ready [prio]) >= 0)
916	{
917	coro_nready--;
918	return av_shift (coro_ready [prio]);	1054	return av_shift (coro_ready [prio]);
919	}
920		1055
921	return 0;	1056	return 0;
922	}	1057	}
923		1058
924	static int	1059	static int
925	api_ready (SV *coro_sv)	1060	api_ready (SV *coro_sv)
926	{	1061	{
		1062	dTHX;
927	struct coro *coro;	1063	struct coro *coro;
928		1064
929	if (SvROK (coro_sv))	1065	if (SvROK (coro_sv))
930	coro_sv = SvRV (coro_sv);	1066	coro_sv = SvRV (coro_sv);
931		1067
932	coro = SvSTATE (coro_sv);	1068	coro = SvSTATE (coro_sv);
933		1069
934	if (coro->flags & CF_READY)	1070	if (coro->flags & CF_READY)
935	return 0;	1071	return 0;
936		1072
937	#if 0 /* this is actually harmless */
938	if (coro->flags & CF_RUNNING)
939	croak ("Coro::ready called on currently running coroutine");
940	#endif
941
942	coro->flags |= CF_READY;	1073	coro->flags |= CF_READY;
943		1074
944	LOCK;	1075	LOCK;
945	coro_enq (SvREFCNT_inc (coro_sv));	1076	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1077	++coro_nready;
946	UNLOCK;	1078	UNLOCK;
947		1079
948	return 1;	1080	return 1;
949	}	1081	}
950		1082
951	static int	1083	static int
952	api_is_ready (SV *coro_sv)	1084	api_is_ready (SV *coro_sv)
953	{	1085	{
		1086	dTHX;
954	return !!SvSTATE (coro_sv)->flags & CF_READY;	1087	return !!(SvSTATE (coro_sv)->flags & CF_READY);
955	}	1088	}
956		1089
957	static void	1090	static void
958	prepare_schedule (struct transfer_args *ta)	1091	prepare_schedule (pTHX_ struct transfer_args *ta)
959	{	1092	{
960	SV *prev, *next;	1093	SV *prev_sv, *next_sv;
961		1094
962	for (;;)	1095	for (;;)
963	{	1096	{
964	LOCK;	1097	LOCK;
965	next = coro_deq (PRIO_MIN);	1098	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1099
		1100	/* nothing to schedule: call the idle handler */
		1101	if (!next_sv)
		1102	{
		1103	dSP;
		1104	UNLOCK;
		1105
		1106	ENTER;
		1107	SAVETMPS;
		1108
		1109	PUSHMARK (SP);
		1110	PUTBACK;
		1111	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1112
		1113	FREETMPS;
		1114	LEAVE;
		1115	continue;
		1116	}
		1117
		1118	ta->next = SvSTATE (next_sv);
		1119
		1120	/* cannot transfer to destroyed coros, skip and look for next */
		1121	if (ta->next->flags & CF_DESTROYED)
		1122	{
		1123	UNLOCK;
		1124	SvREFCNT_dec (next_sv);
		1125	/* coro_nready is already taken care of by destroy */
		1126	continue;
		1127	}
		1128
		1129	--coro_nready;
966	UNLOCK;	1130	UNLOCK;
967
968	if (next)
969	break;	1131	break;
970
971	{
972	dSP;
973
974	ENTER;
975	SAVETMPS;
976
977	PUSHMARK (SP);
978	PUTBACK;
979	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
980
981	FREETMPS;
982	LEAVE;
983	}	1132	}
984	}
985
986	prev = SvRV (coro_current);
987	SvRV_set (coro_current, next);
988		1133
989	/* free this only after the transfer */	1134	/* free this only after the transfer */
		1135	prev_sv = SvRV (coro_current);
		1136	SvRV_set (coro_current, next_sv);
		1137	ta->prev = SvSTATE (prev_sv);
		1138
		1139	assert (ta->next->flags & CF_READY);
		1140	ta->next->flags &= ~CF_READY;
		1141
990	LOCK;	1142	LOCK;
991	free_coro_mortal ();	1143	free_coro_mortal (aTHX);
		1144	coro_mortal = prev_sv;
992	UNLOCK;	1145	UNLOCK;
993	coro_mortal = prev;
994
995	assert (!SvROK(prev));//D
996	assert (!SvROK(next));//D
997
998	ta->prev = SvSTATE (prev);
999	ta->next = SvSTATE (next);
1000	ta->flags = TRANSFER_SAVE_ALL;
1001
1002	assert (ta->flags & CF_READY);
1003	ta->next->flags &= ~CF_READY;
1004	}	1146	}
1005		1147
1006	static void	1148	static void
1007	prepare_cede (struct transfer_args *ta)	1149	prepare_cede (pTHX_ struct transfer_args *ta)
1008	{	1150	{
1009	api_ready (coro_current);	1151	api_ready (coro_current);
1010
1011	prepare_schedule (ta);	1152	prepare_schedule (aTHX_ ta);
		1153	}
		1154
		1155	static int
		1156	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1157	{
		1158	if (coro_nready)
		1159	{
		1160	SV *prev = SvRV (coro_current);
		1161	prepare_schedule (aTHX_ ta);
		1162	api_ready (prev);
		1163	return 1;
		1164	}
		1165	else
		1166	return 0;
1012	}	1167	}
1013		1168
1014	static void	1169	static void
1015	api_schedule (void)	1170	api_schedule (void)
1016	{	1171	{
		1172	dTHX;
1017	struct transfer_args ta;	1173	struct transfer_args ta;
1018		1174
1019	prepare_schedule (&ta);	1175	prepare_schedule (aTHX_ &ta);
1020	TRANSFER (ta);	1176	TRANSFER (ta);
1021	}	1177	}
1022		1178
1023	static void	1179	static int
1024	api_cede (void)	1180	api_cede (void)
1025	{	1181	{
		1182	dTHX;
1026	struct transfer_args ta;	1183	struct transfer_args ta;
1027		1184
1028	prepare_cede (&ta);	1185	prepare_cede (aTHX_ &ta);
		1186
		1187	if (ta.prev != ta.next)
		1188	{
1029	TRANSFER (ta);	1189	TRANSFER (ta);
		1190	return 1;
		1191	}
		1192	else
		1193	return 0;
		1194	}
		1195
		1196	static int
		1197	api_cede_notself (void)
		1198	{
		1199	dTHX;
		1200	struct transfer_args ta;
		1201
		1202	if (prepare_cede_notself (aTHX_ &ta))
		1203	{
		1204	TRANSFER (ta);
		1205	return 1;
		1206	}
		1207	else
		1208	return 0;
1030	}	1209	}
1031		1210
1032	MODULE = Coro::State PACKAGE = Coro::State	1211	MODULE = Coro::State PACKAGE = Coro::State
1033		1212
1034	PROTOTYPES: DISABLE	1213	PROTOTYPES: DISABLE
…		…
1040	#endif	1219	#endif
1041	BOOT_PAGESIZE;	1220	BOOT_PAGESIZE;
1042		1221
1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1222	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1044		1223
1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1226	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1227	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1228	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1229	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1230	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1048		1231
1049	main_mainstack = PL_mainstack;	1232	main_mainstack = PL_mainstack;
		1233	main_top_env = PL_top_env;
		1234
		1235	while (main_top_env->je_prev)
		1236	main_top_env = main_top_env->je_prev;
1050		1237
1051	coroapi.ver = CORO_API_VERSION;	1238	coroapi.ver = CORO_API_VERSION;
1052	coroapi.transfer = api_transfer;	1239	coroapi.transfer = api_transfer;
1053		1240
1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1241	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1062	HV *hv;	1249	HV *hv;
1063	int i;	1250	int i;
1064		1251
1065	Newz (0, coro, 1, struct coro);	1252	Newz (0, coro, 1, struct coro);
1066	coro->args = newAV ();	1253	coro->args = newAV ();
		1254	coro->save = CORO_SAVE_DEF;
1067	coro->flags = CF_NEW;	1255	coro->flags = CF_NEW;
1068		1256
		1257	if (coro_first) coro_first->prev = coro;
		1258	coro->next = coro_first;
		1259	coro_first = coro;
		1260
1069	hv = newHV ();	1261	coro->hv = hv = newHV ();
1070	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1262	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1071	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1263	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1072		1264
1073	for (i = 1; i < items; i++)	1265	for (i = 1; i < items; i++)
1074	av_push (coro->args, newSVsv (ST (i)));	1266	av_push (coro->args, newSVsv (ST (i)));
1075	}	1267	}
1076	OUTPUT:	1268	OUTPUT:
		1269	RETVAL
		1270
		1271	int
		1272	save (SV *coro, int new_save = -1)
		1273	CODE:
		1274	RETVAL = api_save (coro, new_save);
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
		1279	save_also (SV *coro_sv, int save_also)
		1280	CODE:
		1281	{
		1282	struct coro *coro = SvSTATE (coro_sv);
		1283	RETVAL = coro->save;
		1284	coro->save |= save_also;
		1285	}
		1286	OUTPUT:
1077	RETVAL	1287	RETVAL
1078		1288
1079	void	1289	void
1080	_set_stacklevel (...)	1290	_set_stacklevel (...)
1081	ALIAS:	1291	ALIAS:
1082	Coro::State::transfer = 1	1292	Coro::State::transfer = 1
1083	Coro::schedule = 2	1293	Coro::schedule = 2
1084	Coro::cede = 3	1294	Coro::cede = 3
		1295	Coro::cede_notself = 4
1085	CODE:	1296	CODE:
1086	{	1297	{
1087	struct transfer_args ta;	1298	struct transfer_args ta;
1088		1299
1089	switch (ix)	1300	switch (ix)
1090	{	1301	{
1091	case 0:	1302	case 0:
1092	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1303	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1093	ta.next = 0;	1304	ta.next = 0;
1094	ta.flags = TRANSFER_SET_STACKLEVEL;
1095	break;	1305	break;
1096		1306
1097	case 1:	1307	case 1:
1098	if (items != 3)	1308	if (items != 2)
1099	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1309	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1100		1310
1101	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1311	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1102	break;	1312	break;
1103		1313
1104	case 2:	1314	case 2:
1105	prepare_schedule (&ta);	1315	prepare_schedule (aTHX_ &ta);
1106	break;	1316	break;
1107		1317
1108	case 3:	1318	case 3:
1109	prepare_cede (&ta);	1319	prepare_cede (aTHX_ &ta);
		1320	break;
		1321
		1322	case 4:
		1323	if (!prepare_cede_notself (aTHX_ &ta))
		1324	XSRETURN_EMPTY;
		1325
1110	break;	1326	break;
1111	}	1327	}
1112		1328
		1329	BARRIER;
1113	TRANSFER (ta);	1330	TRANSFER (ta);
1114	}
1115		1331
1116	void	1332	if (GIMME_V != G_VOID && ta.next != ta.prev)
1117	_clone_state_from (SV *dst, SV *src)	1333	XSRETURN_YES;
		1334	}
		1335
		1336	bool
		1337	_destroy (SV *coro_sv)
1118	CODE:	1338	CODE:
1119	{	1339	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1120	struct coro *coro_src = SvSTATE (src);	1340	OUTPUT:
1121		1341	RETVAL
1122	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1123
1124	++coro_src->refcnt;
1125	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1126	}
1127		1342
1128	void	1343	void
1129	_exit (code)	1344	_exit (code)
1130	int code	1345	int code
1131	PROTOTYPE: $	1346	PROTOTYPE: $
1132	CODE:	1347	CODE:
1133	_exit (code);	1348	_exit (code);
1134		1349
1135	int	1350	int
		1351	cctx_stacksize (int new_stacksize = 0)
		1352	CODE:
		1353	RETVAL = coro_stacksize;
		1354	if (new_stacksize)
		1355	coro_stacksize = new_stacksize;
		1356	OUTPUT:
		1357	RETVAL
		1358
		1359	int
1136	cctx_count ()	1360	cctx_count ()
1137	CODE:	1361	CODE:
1138	RETVAL = cctx_count;	1362	RETVAL = cctx_count;
1139	OUTPUT:	1363	OUTPUT:
1140	RETVAL	1364	RETVAL
…		…
1144	CODE:	1368	CODE:
1145	RETVAL = cctx_idle;	1369	RETVAL = cctx_idle;
1146	OUTPUT:	1370	OUTPUT:
1147	RETVAL	1371	RETVAL
1148		1372
		1373	void
		1374	list ()
		1375	PPCODE:
		1376	{
		1377	struct coro *coro;
		1378	for (coro = coro_first; coro; coro = coro->next)
		1379	if (coro->hv)
		1380	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1381	}
		1382
		1383	void
		1384	call (Coro::State coro, SV *coderef)
		1385	ALIAS:
		1386	eval = 1
		1387	CODE:
		1388	{
		1389	if (coro->mainstack)
		1390	{
		1391	struct coro temp;
		1392	Zero (&temp, 1, struct coro);
		1393	temp.save = CORO_SAVE_ALL;
		1394
		1395	if (!(coro->flags & CF_RUNNING))
		1396	{
		1397	save_perl (aTHX_ &temp);
		1398	load_perl (aTHX_ coro);
		1399	}
		1400
		1401	{
		1402	dSP;
		1403	ENTER;
		1404	SAVETMPS;
		1405	PUSHMARK (SP);
		1406	PUTBACK;
		1407	if (ix)
		1408	eval_sv (coderef, 0);
		1409	else
		1410	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1411	SPAGAIN;
		1412	FREETMPS;
		1413	LEAVE;
		1414	PUTBACK;
		1415	}
		1416
		1417	if (!(coro->flags & CF_RUNNING))
		1418	{
		1419	save_perl (aTHX_ coro);
		1420	load_perl (aTHX_ &temp);
		1421	}
		1422	}
		1423	}
		1424
		1425	SV *
		1426	is_ready (Coro::State coro)
		1427	PROTOTYPE: $
		1428	ALIAS:
		1429	is_ready = CF_READY
		1430	is_running = CF_RUNNING
		1431	is_new = CF_NEW
		1432	is_destroyed = CF_DESTROYED
		1433	CODE:
		1434	RETVAL = boolSV (coro->flags & ix);
		1435	OUTPUT:
		1436	RETVAL
		1437
		1438	SV *
		1439	has_stack (Coro::State coro)
		1440	PROTOTYPE: $
		1441	CODE:
		1442	RETVAL = boolSV (!!coro->cctx);
		1443	OUTPUT:
		1444	RETVAL
		1445
		1446	IV
		1447	rss (Coro::State coro)
		1448	PROTOTYPE: $
		1449	CODE:
		1450	RETVAL = coro_rss (coro);
		1451	OUTPUT:
		1452	RETVAL
		1453
		1454
1149	MODULE = Coro::State PACKAGE = Coro	1455	MODULE = Coro::State PACKAGE = Coro
1150		1456
1151	BOOT:	1457	BOOT:
1152	{	1458	{
1153	int i;	1459	int i;
		1460
		1461	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1462	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1463	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1464
		1465	coro_current = get_sv ("Coro::current", FALSE);
		1466	SvREADONLY_on (coro_current);
1154		1467
1155	coro_stash = gv_stashpv ("Coro", TRUE);	1468	coro_stash = gv_stashpv ("Coro", TRUE);
1156		1469
1157	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1470	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1158	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1471	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1159	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1472	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1160	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1473	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1161	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1474	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1162	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1475	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1163		1476
1164	coro_current = get_sv ("Coro::current", FALSE);
1165	SvREADONLY_on (coro_current);
1166
1167	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1477	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1168	coro_ready[i] = newAV ();	1478	coro_ready[i] = newAV ();
1169		1479
1170	{	1480	{
1171	SV *sv = perl_get_sv("Coro::API", 1);	1481	SV *sv = perl_get_sv("Coro::API", 1);
1172		1482
1173	coroapi.schedule = api_schedule;	1483	coroapi.schedule = api_schedule;
		1484	coroapi.save = api_save;
1174	coroapi.cede = api_cede;	1485	coroapi.cede = api_cede;
		1486	coroapi.cede_notself = api_cede_notself;
1175	coroapi.ready = api_ready;	1487	coroapi.ready = api_ready;
1176	coroapi.is_ready = api_is_ready;	1488	coroapi.is_ready = api_is_ready;
1177	coroapi.nready = &coro_nready;	1489	coroapi.nready = &coro_nready;
1178	coroapi.current = coro_current;	1490	coroapi.current = coro_current;
1179		1491
1180	GCoroAPI = &coroapi;	1492	GCoroAPI = &coroapi;
1181	sv_setiv (sv, (IV)&coroapi);	1493	sv_setiv (sv, (IV)&coroapi);
1182	SvREADONLY_on (sv);	1494	SvREADONLY_on (sv);
1183	}	1495	}
1184	}	1496	}
		1497
		1498	void
		1499	_set_current (SV *current)
		1500	PROTOTYPE: $
		1501	CODE:
		1502	SvREFCNT_dec (SvRV (coro_current));
		1503	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1185		1504
1186	int	1505	int
1187	prio (Coro::State coro, int newprio = 0)	1506	prio (Coro::State coro, int newprio = 0)
1188	ALIAS:	1507	ALIAS:
1189	nice = 1	1508	nice = 1
…		…
1192	RETVAL = coro->prio;	1511	RETVAL = coro->prio;
1193		1512
1194	if (items > 1)	1513	if (items > 1)
1195	{	1514	{
1196	if (ix)	1515	if (ix)
1197	newprio += coro->prio;	1516	newprio = coro->prio - newprio;
1198		1517
1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1518	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1519	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1201		1520
1202	coro->prio = newprio;	1521	coro->prio = newprio;
1203	}	1522	}
1204	}	1523	}
		1524	OUTPUT:
		1525	RETVAL
1205		1526
1206	SV *	1527	SV *
1207	ready (SV *self)	1528	ready (SV *self)
1208	PROTOTYPE: $	1529	PROTOTYPE: $
1209	CODE:	1530	CODE:
1210	RETVAL = boolSV (api_ready (self));	1531	RETVAL = boolSV (api_ready (self));
1211	OUTPUT:	1532	OUTPUT:
1212	RETVAL	1533	RETVAL
1213		1534
1214	SV *
1215	is_ready (SV *self)
1216	PROTOTYPE: $
1217	CODE:
1218	RETVAL = boolSV (api_is_ready (self));
1219	OUTPUT:
1220	RETVAL
1221
1222	int	1535	int
1223	nready (...)	1536	nready (...)
1224	PROTOTYPE:	1537	PROTOTYPE:
1225	CODE:	1538	CODE:
1226	RETVAL = coro_nready;	1539	RETVAL = coro_nready;
1227	OUTPUT:	1540	OUTPUT:
1228	RETVAL	1541	RETVAL
1229		1542
		1543	# for async_pool speedup
1230	void	1544	void
1231	_set_current (SV *current)	1545	_pool_1 (SV *cb)
1232	PROTOTYPE: $
1233	CODE:	1546	CODE:
1234	SvREFCNT_dec (SvRV (coro_current));	1547	{
1235	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1548	int i, len;
		1549	HV *hv = (HV *)SvRV (coro_current);
		1550	AV *defav = GvAV (PL_defgv);
		1551	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1552	AV *invoke_av;
		1553
		1554	if (!invoke)
		1555	croak ("\3terminate\2\n");
		1556
		1557	hv_store (hv, "desc", sizeof ("desc") - 1,
		1558	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1559
		1560	invoke_av = (AV *)SvRV (invoke);
		1561	len = av_len (invoke_av);
		1562
		1563	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1564
		1565	if (len > 0)
		1566	{
		1567	av_fill (defav, len - 1);
		1568	for (i = 0; i < len; ++i)
		1569	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1570	}
		1571
		1572	SvREFCNT_dec (invoke);
		1573	}
		1574
		1575	void
		1576	_pool_2 (SV *cb)
		1577	CODE:
		1578	{
		1579	struct coro *coro = SvSTATE (coro_current);
		1580
		1581	sv_setsv (cb, &PL_sv_undef);
		1582
		1583	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1584	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1585	croak ("\3terminate\2\n");
		1586
		1587	av_clear (GvAV (PL_defgv));
		1588	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1589	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1590	coro->save = CORO_SAVE_DEF;
		1591	coro->prio = 0;
		1592	av_push (av_async_pool, newSVsv (coro_current));
		1593	}
		1594
1236		1595
1237	MODULE = Coro::State PACKAGE = Coro::AIO	1596	MODULE = Coro::State PACKAGE = Coro::AIO
1238		1597
1239	SV *	1598	SV *
1240	_get_state ()	1599	_get_state ()
1241	CODE:	1600	CODE:
1242	{	1601	{
		1602	struct io_state *data;
		1603
1243	RETVAL = newSV (sizeof (struct io_state));	1604	RETVAL = newSV (sizeof (struct io_state));
1244	struct io_state *data = (struct io_state *)SvPVX (RETVAL);	1605	data = (struct io_state *)SvPVX (RETVAL);
1245	SvCUR_set (RETVAL, sizeof (struct io_state));	1606	SvCUR_set (RETVAL, sizeof (struct io_state));
1246	SvPOK_only (RETVAL);	1607	SvPOK_only (RETVAL);
1247		1608
1248	data->errorno = errno;	1609	data->errorno = errno;
1249	data->laststype = PL_laststype;	1610	data->laststype = PL_laststype;

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