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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.125 by root, Mon Dec 11 20:54:45 2006 UTC vs.
Revision 1.186 by root, Fri Oct 5 20:10:42 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	/* 5.8.7 */
44	#ifndef SvRV_set
45	# define SvRV_set(s,v) SvRV(s) = (v)
46	#endif
47
48	#include <stdio.h>	11	#include <stdio.h>
49	#include <errno.h>	12	#include <errno.h>
50	#include <assert.h>	13	#include <assert.h>
51
52	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
53	# undef STACKGUARD
54	#endif
55
56	#ifndef STACKGUARD
57	# define STACKGUARD 0
58	#endif
59		14
60	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
61	# include <unistd.h>	16	# include <unistd.h>
62	# include <sys/mman.h>	17	# include <sys/mman.h>
63	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
78	#else	33	#else
79	# define PAGESIZE 0	34	# define PAGESIZE 0
80	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
81	#endif	36	#endif
82		37
83	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
84	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
85	* 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. */
86	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
87	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
88		97
89	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
90		99
91	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
92	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
93	#else	103	#else
94	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
95	#endif	106	#endif
96		107
97	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
98		109
99	#include "CoroAPI.h"	110	#include "CoroAPI.h"
…		…
105	#else	116	#else
106	# define LOCK (void)0	117	# define LOCK (void)0
107	# define UNLOCK (void)0	118	# define UNLOCK (void)0
108	#endif	119	#endif
109		120
		121	/* helper storage struct for Coro::AIO */
110	struct io_state	122	struct io_state
111	{	123	{
112	int errorno;	124	int errorno;
113	I32 laststype;	125	I32 laststype;
114	int laststatval;	126	int laststatval;
115	Stat_t statcache;	127	Stat_t statcache;
116	};	128	};
117		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
118	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
119	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;
120	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
121	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
122		136
		137	static GV *irsgv; /* $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
123	static struct coro_cctx *cctx_first;	144	static struct coro_cctx *cctx_first;
124	static int cctx_count, cctx_idle;	145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		154	};
125		155
126	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
127	typedef struct coro_cctx {	157	typedef struct coro_cctx {
128	struct coro_cctx *next;	158	struct coro_cctx *next;
129		159
130	/* the stack */	160	/* the stack */
131	void *sptr;	161	void *sptr;
132	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
133		163
134	/* cpu state */	164	/* cpu state */
135	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	165	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		166	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
136	JMPENV *top_env;	167	JMPENV *top_env;
137	coro_context cctx;	168	coro_context cctx;
138		169
139	int inuse;
140
141	#if USE_VALGRIND	170	#if CORO_USE_VALGRIND
142	int valgrind_id;	171	int valgrind_id;
143	#endif	172	#endif
		173	unsigned char flags;
144	} coro_cctx;	174	} coro_cctx;
145		175
146	enum {	176	enum {
147	CF_RUNNING = 0x0001, /* coroutine is running */	177	CF_RUNNING = 0x0001, /* coroutine is running */
148	CF_READY = 0x0002, /* coroutine is ready */	178	CF_READY = 0x0002, /* coroutine is ready */
149	CF_NEW = 0x0004, /* ahs never been switched to */	179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
150	};	181	};
151		182
152	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
153	struct coro {	184	struct coro {
154	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
155	coro_cctx *cctx;	186	coro_cctx *cctx;
156		187
157	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
158	AV *args;	189	AV *args;
159	int refcnt;	190	int refcnt;
160	int save; /* CORO_SAVE flags */
161	int flags; /* CF_ flags */	191	int flags; /* CF_ flags */
162		192
163	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
164	AV *defav; /* @_ */	194	AV *defav; /* @_ */
165	SV *defsv; /* $_ */	195	SV *defsv; /* $_ */
166	SV *errsv; /* $@ */	196	SV *errsv; /* $@ */
		197	SV *deffh; /* default filehandle */
167	SV *irssv; /* $/ */	198	SV *irssv; /* $/ */
168	SV *irssv_sv; /* real $/ cache */	199	SV *irssv_sv; /* real $/ cache */
169		200
170	#define VAR(name,type) type name;	201	#define VAR(name,type) type name;
171	# include "state.h"	202	# include "state.h"
172	#undef VAR	203	#undef VAR
173		204
		205	/* statistics */
		206	int usecount; /* number of transfers to this coro */
		207
174	/* coro process data */	208	/* coro process data */
175	int prio;	209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	SV *saved_deffh;
		214
		215	/* linked list */
		216	struct coro *next, *prev;
		217	HV *hv; /* the perl hash associated with this coro, if any */
176	};	218	};
177		219
178	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
179	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
180		222
		223	/** Coro ********************************************************************/
		224
		225	#define PRIO_MAX 3
		226	#define PRIO_HIGH 1
		227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
		231
		232	/* for Coro.pm */
		233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		235	static int coro_nready;
		236	static struct coro *coro_first;
		237
		238	/** lowlevel stuff **********************************************************/
		239
181	static AV *	240	static AV *
182	coro_clone_padlist (CV *cv)	241	coro_clone_padlist (pTHX_ CV *cv)
183	{	242	{
184	AV *padlist = CvPADLIST (cv);	243	AV *padlist = CvPADLIST (cv);
185	AV *newpadlist, *newpad;	244	AV *newpadlist, *newpad;
186		245
187	newpadlist = newAV ();	246	newpadlist = newAV ();
…		…
199		258
200	return newpadlist;	259	return newpadlist;
201	}	260	}
202		261
203	static void	262	static void
204	free_padlist (AV *padlist)	263	free_padlist (pTHX_ AV *padlist)
205	{	264	{
206	/* may be during global destruction */	265	/* may be during global destruction */
207	if (SvREFCNT (padlist))	266	if (SvREFCNT (padlist))
208	{	267	{
209	I32 i = AvFILLp (padlist);	268	I32 i = AvFILLp (padlist);
…		…
230	AV *padlist;	289	AV *padlist;
231	AV *av = (AV *)mg->mg_obj;	290	AV *av = (AV *)mg->mg_obj;
232		291
233	/* casting is fun. */	292	/* casting is fun. */
234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
235	free_padlist (padlist);	294	free_padlist (aTHX_ padlist);
236		295
237	SvREFCNT_dec (av);	296	SvREFCNT_dec (av);
238		297
239	return 0;	298	return 0;
240	}	299	}
…		…
248	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
249	? SvMAGIC (cv) \	308	? SvMAGIC (cv) \
250	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
251	: 0	310	: 0
252		311
		312	static struct coro *
		313	SvSTATE_ (pTHX_ SV *coro)
		314	{
		315	HV *stash;
		316	MAGIC *mg;
		317
		318	if (SvROK (coro))
		319	coro = SvRV (coro);
		320
		321	if (SvTYPE (coro) != SVt_PVHV)
		322	croak ("Coro::State object required");
		323
		324	stash = SvSTASH (coro);
		325	if (stash != coro_stash && stash != coro_state_stash)
		326	{
		327	/* very slow, but rare, check */
		328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		329	croak ("Coro::State object required");
		330	}
		331
		332	mg = CORO_MAGIC (coro);
		333	return (struct coro *)mg->mg_ptr;
		334	}
		335
		336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		337
253	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
254	static void	339	static void
255	get_padlist (CV *cv)	340	get_padlist (pTHX_ CV *cv)
256	{	341	{
257	MAGIC *mg = CORO_MAGIC (cv);	342	MAGIC *mg = CORO_MAGIC (cv);
258	AV *av;	343	AV *av;
259		344
260	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
261	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
262	else	347	else
263	{	348	{
264	#if 0	349	#if CORO_PREFER_PERL_FUNCTIONS
265	/* this is probably cleaner, but also slower? */	350	/* this is probably cleaner, but also slower? */
266	CV *cp = Perl_cv_clone (cv);	351	CV *cp = Perl_cv_clone (cv);
267	CvPADLIST (cv) = CvPADLIST (cp);	352	CvPADLIST (cv) = CvPADLIST (cp);
268	CvPADLIST (cp) = 0;	353	CvPADLIST (cp) = 0;
269	SvREFCNT_dec (cp);	354	SvREFCNT_dec (cp);
270	#else	355	#else
271	CvPADLIST (cv) = coro_clone_padlist (cv);	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
272	#endif	357	#endif
273	}	358	}
274	}	359	}
275		360
276	static void	361	static void
277	put_padlist (CV *cv)	362	put_padlist (pTHX_ CV *cv)
278	{	363	{
279	MAGIC *mg = CORO_MAGIC (cv);	364	MAGIC *mg = CORO_MAGIC (cv);
280	AV *av;	365	AV *av;
281		366
282	if (!mg)	367	if (!mg)
…		…
293	av_extend (av, AvMAX (av) + 1);	378	av_extend (av, AvMAX (av) + 1);
294		379
295	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
296	}	381	}
297		382
298	#define SB do {	383	/** load & save, init *******************************************************/
299	#define SE } while (0)
300		384
301	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
302
303	static void	385	static void
304	load_perl (Coro__State c)	386	load_perl (pTHX_ Coro__State c)
305	{	387	{
306	#define VAR(name,type) PL_ ## name = c->name;	388	#define VAR(name,type) PL_ ## name = c->name;
307	# include "state.h"	389	# include "state.h"
308	#undef VAR	390	#undef VAR
309		391
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	GvSV (PL_defgv) = c->defsv;
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	GvAV (PL_defgv) = c->defav;
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	GvSV (PL_errgv) = c->errsv;
313	if (c->irssv)	395	GvSV (irsgv) = c->irssv_sv;
314	{
315	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
316	SvREFCNT_dec (c->irssv);
317	else
318	{
319	REPLACE_SV (PL_rs, c->irssv);
320	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
321	sv_setsv (c->irssv_sv, PL_rs);
322	}
323	}
324		396
325	{	397	{
326	dSP;	398	dSP;
327	CV *cv;	399	CV *cv;
328		400
329	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
330	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
331	{	403	{
332	put_padlist (cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
333	CvDEPTH (cv) = PTR2IV (POPs);	405	CvDEPTH (cv) = PTR2IV (POPs);
334	CvPADLIST (cv) = (AV *)POPs;	406	CvPADLIST (cv) = (AV *)POPs;
335	}	407	}
336		408
337	PUTBACK;	409	PUTBACK;
338	}	410	}
339	}	411	}
340		412
341	static void	413	static void
342	save_perl (Coro__State c)	414	save_perl (pTHX_ Coro__State c)
343	{	415	{
344	{	416	{
345	dSP;	417	dSP;
346	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
347	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
350	/*	422	/*
351	* the worst thing you can imagine happens first - we have to save	423	* the worst thing you can imagine happens first - we have to save
352	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
353	*/	425	*/
354		426
355	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
356	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
357	for (;;)	429	for (;;)
358	{	430	{
359	while (cxix >= 0)	431	while (cxix >= 0)
360	{	432	{
361	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
362		434
363	if (CxTYPE (cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
364	{	436	{
365	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
366		438
367	if (CvDEPTH (cv))	439	if (CvDEPTH (cv))
368	{	440	{
369	EXTEND (SP, 3);	441	EXTEND (SP, 3);
370
371	PUSHs ((SV *)CvPADLIST (cv));	442	PUSHs ((SV *)CvPADLIST (cv));
372	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
374		445
375	CvDEPTH (cv) = 0;	446	CvDEPTH (cv) = 0;
376	get_padlist (cv);	447	get_padlist (aTHX_ cv);
377	}	448	}
378	}	449	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE (cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	450	}
388		451
389	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
390	break;	453	break;
391		454
392	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
393	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
394	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
395	}	458	}
396		459
397	PUTBACK;	460	PUTBACK;
398	}	461	}
399		462
400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
403	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	466	c->irssv_sv = GvSV (irsgv);
404		467
405	#define VAR(name,type)c->name = PL_ ## name;	468	#define VAR(name,type)c->name = PL_ ## name;
406	# include "state.h"	469	# include "state.h"
407	#undef VAR	470	#undef VAR
408	}	471	}
…		…
411	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
412	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
413	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
414	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
415	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
416	static void	482	static void
417	coro_init_stacks ()	483	coro_init_stacks (pTHX)
418	{	484	{
419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	485	PL_curstackinfo = new_stackinfo(64, 6);
420	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
421	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423		489
424	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
425	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427		493
428	New(50,PL_tmps_stack,128,SV*);	494	New(50,PL_tmps_stack,64,SV*);
429	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
430	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
431	PL_tmps_max = 128;	497	PL_tmps_max = 64;
432		498
433	New(54,PL_markstack,32,I32);	499	New(54,PL_markstack,16,I32);
434	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
435	PL_markstack_max = PL_markstack + 32;	501	PL_markstack_max = PL_markstack + 16;
436		502
437	#ifdef SET_MARK_OFFSET	503	#ifdef SET_MARK_OFFSET
438	SET_MARK_OFFSET;	504	SET_MARK_OFFSET;
439	#endif	505	#endif
440		506
441	New(54,PL_scopestack,32,I32);	507	New(54,PL_scopestack,16,I32);
442	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
443	PL_scopestack_max = 32;	509	PL_scopestack_max = 16;
444		510
445	New(54,PL_savestack,64,ANY);	511	New(54,PL_savestack,64,ANY);
446	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
447	PL_savestack_max = 64;	513	PL_savestack_max = 64;
448		514
449	#if !PERL_VERSION_ATLEAST (5,9,0)	515	#if !PERL_VERSION_ATLEAST (5,9,0)
450	New(54,PL_retstack,16,OP*);	516	New(54,PL_retstack,4,OP*);
451	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
452	PL_retstack_max = 16;	518	PL_retstack_max = 4;
453	#endif	519	#endif
454	}	520	}
		521	#endif
455		522
456	/*	523	/*
457	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
458	*/	525	*/
459	static void	526	static void
460	coro_destroy_stacks ()	527	coro_destroy_stacks (pTHX)
461	{	528	{
462	if (!IN_DESTRUCT)
463	{
464	/* is this ugly, I ask? */
465	LEAVE_SCOPE (0);
466
467	/* sure it is, but more important: is it correct?? :/ */
468	FREETMPS;
469
470	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
471	}
472
473	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
474	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
475		531
476	while (PL_curstackinfo)	532	while (PL_curstackinfo)
477	{	533	{
478	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
479		535
480	{ /*D*//*remove*/
481	dSP;
482	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
483	PUTBACK; /* possibly superfluous */
484	}
485
486	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
487	{
488	dounwind (-1);/*D*//*remove*/
489	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
490	}
491		538
492	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
493	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
494	PL_curstackinfo = p;	541	PL_curstackinfo = p;
495	}	542	}
…		…
501	#if !PERL_VERSION_ATLEAST (5,9,0)	548	#if !PERL_VERSION_ATLEAST (5,9,0)
502	Safefree (PL_retstack);	549	Safefree (PL_retstack);
503	#endif	550	#endif
504	}	551	}
505		552
506	static void	553	static size_t
507	setup_coro (struct coro *coro)	554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (*coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
		561	{
		562	#define VAR(name,type)coro->name = PL_ ## name;
		563	# include "state.h"
		564	#undef VAR
		565	}
		566
		567	rss += sizeof (coro->curstackinfo);
		568	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
		575
		576	#if !PERL_VERSION_ATLEAST (5,9,0)
		577	rss += coro->retstack_max * sizeof (OP *);
		578	#endif
		579	}
		580
		581	return rss;
		582	}
		583
		584	/** coroutine stack handling ************************************************/
		585
		586	static void
		587	coro_setup (pTHX_ struct coro *coro)
508	{	588	{
509	/*	589	/*
510	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
511	*/	591	*/
512
513	coro_init_stacks ();	592	coro_init_stacks (aTHX);
514		593
		594	PL_runops = RUNOPS_DEFAULT;
515	PL_curcop = &PL_compiling;	595	PL_curcop = &PL_compiling;
516	PL_in_eval = EVAL_NULL;	596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
517	PL_curpm = 0;	598	PL_curpm = 0;
518	PL_localizing = 0;	599	PL_localizing = 0;
519	PL_dirty = 0;	600	PL_dirty = 0;
520	PL_restartop = 0;	601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	PL_defoutgv = (GV *)NEWSV (0, 0);
		612	gv_init (PL_defoutgv, coro_state_stash, "stdout", sizeof ("stdout") - 1, 0);
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) |= IOf_FLUSH;
		616	GvIOp (PL_defoutgv) = io;
		617	}
521		618
522	{	619	{
523	dSP;	620	dSP;
524	LOGOP myop;	621	LOGOP myop;
525		622
526	SvREFCNT_dec (GvAV (PL_defgv));
527	GvAV (PL_defgv) = coro->args; coro->args = 0;
528
529	Zero (&myop, 1, LOGOP);	623	Zero (&myop, 1, LOGOP);
530	myop.op_next = Nullop;	624	myop.op_next = Nullop;
531	myop.op_flags = OPf_WANT_VOID;	625	myop.op_flags = OPf_WANT_VOID;
532		626
533	PUSHMARK (SP);	627	PUSHMARK (SP);
534	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	628	XPUSHs (av_shift (GvAV (PL_defgv)));
535	PUTBACK;	629	PUTBACK;
536	PL_op = (OP *)&myop;	630	PL_op = (OP *)&myop;
537	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	631	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
538	SPAGAIN;	632	SPAGAIN;
539	}	633	}
540		634
541	ENTER; /* necessary e.g. for dounwind */	635	ENTER; /* necessary e.g. for dounwind */
542	}	636	}
543		637
544	static void	638	static void
		639	coro_destroy (pTHX_ struct coro *coro)
		640	{
		641	if (!IN_DESTRUCT)
		642	{
		643	/* restore all saved variables and stuff */
		644	LEAVE_SCOPE (0);
		645	assert (PL_tmps_floor == -1);
		646
		647	/* free all temporaries */
		648	FREETMPS;
		649	assert (PL_tmps_ix == -1);
		650
		651	/* unwind all extra stacks */
		652	POPSTACK_TO (PL_mainstack);
		653
		654	/* unwind main stack */
		655	dounwind (-1);
		656	}
		657
		658	SvREFCNT_dec (GvSV (PL_defgv));
		659	SvREFCNT_dec (GvAV (PL_defgv));
		660	SvREFCNT_dec (GvSV (PL_errgv));
		661	SvREFCNT_dec (PL_defoutgv);
		662	SvREFCNT_dec (PL_rs);
		663	SvREFCNT_dec (GvSV (irsgv));
		664
		665	SvREFCNT_dec (coro->saved_deffh);
		666	//SvREFCNT_dec (coro->throw);
		667
		668	coro_destroy_stacks (aTHX);
		669	}
		670
		671	static void
545	free_coro_mortal ()	672	free_coro_mortal (pTHX)
546	{	673	{
547	if (coro_mortal)	674	if (coro_mortal)
548	{	675	{
549	SvREFCNT_dec (coro_mortal);	676	SvREFCNT_dec (coro_mortal);
550	coro_mortal = 0;	677	coro_mortal = 0;
551	}	678	}
552	}	679	}
553		680
		681	static int
		682	runops_trace (pTHX)
		683	{
		684	COP *oldcop = 0;
		685	int oldcxix = -2;
		686	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		687	coro_cctx *cctx = coro->cctx;
		688
		689	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		690	{
		691	PERL_ASYNC_CHECK ();
		692
		693	if (cctx->flags & CC_TRACE_ALL)
		694	{
		695	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		696	{
		697	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		698	SV **bot, **top;
		699	AV *av = newAV (); /* return values */
		700	SV **cb;
		701	dSP;
		702
		703	GV *gv = CvGV (cx->blk_sub.cv);
		704	SV *fullname = sv_2mortal (newSV (0));
		705	if (isGV (gv))
		706	gv_efullname3 (fullname, gv, 0);
		707
		708	bot = PL_stack_base + cx->blk_oldsp + 1;
		709	top = cx->blk_gimme == G_ARRAY ? SP + 1
		710	: cx->blk_gimme == G_SCALAR ? bot + 1
		711	: bot;
		712
		713	while (bot < top)
		714	av_push (av, SvREFCNT_inc (*bot++));
		715
		716	PL_runops = RUNOPS_DEFAULT;
		717	ENTER;
		718	SAVETMPS;
		719	EXTEND (SP, 3);
		720	PUSHMARK (SP);
		721	PUSHs (&PL_sv_no);
		722	PUSHs (fullname);
		723	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		724	PUTBACK;
		725	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		726	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		727	SPAGAIN;
		728	FREETMPS;
		729	LEAVE;
		730	PL_runops = runops_trace;
		731	}
		732
		733	if (oldcop != PL_curcop)
		734	{
		735	oldcop = PL_curcop;
		736
		737	if (PL_curcop != &PL_compiling)
		738	{
		739	SV **cb;
		740
		741	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		742	{
		743	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		744
		745	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		746	{
		747	runops_proc_t old_runops = PL_runops;
		748	dSP;
		749	GV *gv = CvGV (cx->blk_sub.cv);
		750	SV *fullname = sv_2mortal (newSV (0));
		751
		752	if (isGV (gv))
		753	gv_efullname3 (fullname, gv, 0);
		754
		755	PL_runops = RUNOPS_DEFAULT;
		756	ENTER;
		757	SAVETMPS;
		758	EXTEND (SP, 3);
		759	PUSHMARK (SP);
		760	PUSHs (&PL_sv_yes);
		761	PUSHs (fullname);
		762	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		763	PUTBACK;
		764	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		765	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		766	SPAGAIN;
		767	FREETMPS;
		768	LEAVE;
		769	PL_runops = runops_trace;
		770	}
		771
		772	oldcxix = cxstack_ix;
		773	}
		774
		775	if (cctx->flags & CC_TRACE_LINE)
		776	{
		777	dSP;
		778
		779	PL_runops = RUNOPS_DEFAULT;
		780	ENTER;
		781	SAVETMPS;
		782	EXTEND (SP, 3);
		783	PL_runops = RUNOPS_DEFAULT;
		784	PUSHMARK (SP);
		785	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		786	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		787	PUTBACK;
		788	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		789	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		790	SPAGAIN;
		791	FREETMPS;
		792	LEAVE;
		793	PL_runops = runops_trace;
		794	}
		795	}
		796	}
		797	}
		798	}
		799
		800	TAINT_NOT;
		801	return 0;
		802	}
		803
554	/* inject a fake call to Coro::State::_cctx_init into the execution */	804	/* inject a fake call to Coro::State::_cctx_init into the execution */
		805	/* _cctx_init should be careful, as it could be called at almost any time */
		806	/* during execution of a perl program */
555	static void NOINLINE	807	static void NOINLINE
556	prepare_cctx (coro_cctx *cctx)	808	prepare_cctx (pTHX_ coro_cctx *cctx)
557	{	809	{
558	dSP;	810	dSP;
559	LOGOP myop;	811	LOGOP myop;
		812
		813	PL_top_env = &PL_start_env;
		814
		815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
560		817
561	Zero (&myop, 1, LOGOP);	818	Zero (&myop, 1, LOGOP);
562	myop.op_next = PL_op;	819	myop.op_next = PL_op;
563	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	820	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
564		821
…		…
570	PL_op = (OP *)&myop;	827	PL_op = (OP *)&myop;
571	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
572	SPAGAIN;	829	SPAGAIN;
573	}	830	}
574		831
		832	/*
		833	* this is a _very_ stripped down perl interpreter ;)
		834	*/
575	static void	835	static void
576	coro_run (void *arg)	836	coro_run (void *arg)
577	{	837	{
		838	dTHX;
		839
578	/* coro_run is the alternative tail of transfer(), so unlock here. */	840	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	841	UNLOCK;
580		842
581	/*	843	/* we now skip the entersub that lead to transfer() */
582	* this is a _very_ stripped down perl interpreter ;)	844	PL_op = PL_op->op_next;
583	*/
584	PL_top_env = &PL_start_env;
585		845
586	/* inject call to cctx_init */	846	/* inject a fake subroutine call to cctx_init */
587	prepare_cctx ((coro_cctx *)arg);	847	prepare_cctx (aTHX_ (coro_cctx *)arg);
588		848
589	/* somebody will hit me for both perl_run and PL_restartop */	849	/* somebody or something will hit me for both perl_run and PL_restartop */
590	PL_restartop = PL_op;	850	PL_restartop = PL_op;
591	perl_run (PL_curinterp);	851	perl_run (PL_curinterp);
592		852
593	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	853	/*
594	abort ();	854	* If perl-run returns we assume exit() was being called or the coro
		855	* fell off the end, which seems to be the only valid (non-bug)
		856	* reason for perl_run to return. We try to exit by jumping to the
		857	* bootstrap-time "top" top_env, as we cannot restore the "main"
		858	* coroutine as Coro has no such concept
		859	*/
		860	PL_top_env = main_top_env;
		861	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
595	}	862	}
596		863
597	static coro_cctx *	864	static coro_cctx *
598	cctx_new ()	865	cctx_new ()
599	{	866	{
600	coro_cctx *cctx;	867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
601		870
602	++cctx_count;	871	++cctx_count;
603		872
604	Newz (0, cctx, 1, coro_cctx);	873	Newz (0, cctx, 1, coro_cctx);
605		874
606	#if HAVE_MMAP	875	#if HAVE_MMAP
607		876
608	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
609	/* mmap supposedly does allocate-on-write for us */	878	/* mmap supposedly does allocate-on-write for us */
610	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	879	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		880
612	if (cctx->sptr == (void *)-1)	881	if (cctx->sptr != (void *)-1)
613	{
614	perror ("FATAL: unable to mmap stack for coroutine");
615	_exit (EXIT_FAILURE);
616	}	882	{
617
618	# if STACKGUARD	883	# if CORO_STACKGUARD
619	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	884	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
620	# endif	885	# endif
		886	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		887	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		888	cctx->flags |= CC_MAPPED;
		889	}
		890	else
		891	#endif
		892	{
		893	cctx->ssize = coro_stacksize * (long)sizeof (long);
		894	New (0, cctx->sptr, coro_stacksize, long);
621		895
622	#else
623
624	cctx->ssize = STACKSIZE * (long)sizeof (long);
625	New (0, cctx->sptr, STACKSIZE, long);
626
627	if (!cctx->sptr)	896	if (!cctx->sptr)
628	{	897	{
629	perror ("FATAL: unable to malloc stack for coroutine");	898	perror ("FATAL: unable to allocate stack for coroutine");
630	_exit (EXIT_FAILURE);	899	_exit (EXIT_FAILURE);
631	}	900	}
632		901
633	#endif	902	stack_start = cctx->sptr;
		903	stack_size = cctx->ssize;
		904	}
634		905
635	#if USE_VALGRIND	906	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
636	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
637	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
638	cctx->ssize + (char *)cctx->sptr
639	);
640	#endif
641
642	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	907	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
643		908
644	return cctx;	909	return cctx;
645	}	910	}
646		911
647	static void	912	static void
…		…
650	if (!cctx)	915	if (!cctx)
651	return;	916	return;
652		917
653	--cctx_count;	918	--cctx_count;
654		919
655	#if USE_VALGRIND	920	#if CORO_USE_VALGRIND
656	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
657	#endif	922	#endif
658		923
659	#if HAVE_MMAP	924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
660	munmap (cctx->sptr, cctx->ssize);	926	munmap (cctx->sptr, cctx->ssize);
661	#else	927	else
		928	#endif
662	Safefree (cctx->sptr);	929	Safefree (cctx->sptr);
663	#endif
664		930
665	Safefree (cctx);	931	Safefree (cctx);
666	}	932	}
667		933
668	static coro_cctx *	934	static coro_cctx *
669	cctx_get ()	935	cctx_get (pTHX)
670	{	936	{
671	coro_cctx *cctx;
672
673	if (cctx_first)	937	while (cctx_first)
674	{	938	{
675	cctx = cctx_first;	939	coro_cctx *cctx = cctx_first;
676	cctx_first = cctx->next;	940	cctx_first = cctx->next;
677	--cctx_idle;	941	--cctx_idle;
678	}	942
679	else	943	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
680	{	944	return cctx;
681	cctx = cctx_new ();	945
682	PL_op = PL_op->op_next;	946	cctx_destroy (cctx);
683	}	947	}
684		948
685	return cctx;	949	return cctx_new ();
686	}	950	}
687		951
688	static void	952	static void
689	cctx_put (coro_cctx *cctx)	953	cctx_put (coro_cctx *cctx)
690	{	954	{
…		…
693	{	957	{
694	coro_cctx *first = cctx_first;	958	coro_cctx *first = cctx_first;
695	cctx_first = first->next;	959	cctx_first = first->next;
696	--cctx_idle;	960	--cctx_idle;
697		961
698	assert (!first->inuse);
699	cctx_destroy (first);	962	cctx_destroy (first);
700	}	963	}
701		964
702	++cctx_idle;	965	++cctx_idle;
703	cctx->next = cctx_first;	966	cctx->next = cctx_first;
704	cctx_first = cctx;	967	cctx_first = cctx;
705	}	968	}
706		969
707	/* never call directly, always through the coro_state_transfer global variable */	970	/** coroutine switching *****************************************************/
		971
708	static void NOINLINE	972	static void NOINLINE
		973	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		974	{
		975	if (prev != next)
		976	{
		977	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		978	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		979
		980	if (next->flags & CF_RUNNING)
		981	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		982
		983	if (next->flags & CF_DESTROYED)
		984	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		985
		986	if (PL_lex_state != LEX_NOTPARSING)
		987	croak ("Coro::State::transfer called while parsing, but this is not supported");
		988	}
		989	}
		990
		991	/* always use the TRANSFER macro */
		992	static void NOINLINE
709	transfer (struct coro *prev, struct coro *next)	993	transfer (pTHX_ struct coro *prev, struct coro *next)
710	{	994	{
711	dSTACKLEVEL;	995	dSTACKLEVEL;
712		996
713	/* sometimes transfer is only called to set idle_sp */	997	/* sometimes transfer is only called to set idle_sp */
714	if (!next)	998	if (!next)
715	{	999	{
716	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1000	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
717	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */	1001	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
718	}	1002	}
719	else if (prev != next)	1003	else if (prev != next)
720	{	1004	{
721	coro_cctx *prev__cctx;	1005	coro_cctx *prev__cctx;
722		1006
723	if (prev->flags & CF_NEW)	1007	if (prev->flags & CF_NEW)
724	{	1008	{
725	/* create a new empty context */	1009	/* create a new empty context */
726	Newz (0, prev->cctx, 1, coro_cctx);	1010	Newz (0, prev->cctx, 1, coro_cctx);
727	prev->cctx->inuse = 1;
728	prev->flags &= ~CF_NEW;	1011	prev->flags &= ~CF_NEW;
729	prev->flags |= CF_RUNNING;	1012	prev->flags |= CF_RUNNING;
730	}	1013	}
731
732	/*TODO: must not croak here */
733	if (!prev->flags & CF_RUNNING)
734	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
735
736	if (next->flags & CF_RUNNING)
737	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
738		1014
739	prev->flags &= ~CF_RUNNING;	1015	prev->flags &= ~CF_RUNNING;
740	next->flags |= CF_RUNNING;	1016	next->flags |= CF_RUNNING;
741		1017
742	LOCK;	1018	LOCK;
…		…
744	if (next->flags & CF_NEW)	1020	if (next->flags & CF_NEW)
745	{	1021	{
746	/* need to start coroutine */	1022	/* need to start coroutine */
747	next->flags &= ~CF_NEW;	1023	next->flags &= ~CF_NEW;
748	/* first get rid of the old state */	1024	/* first get rid of the old state */
749	save_perl (prev);	1025	save_perl (aTHX_ prev);
750	/* setup coroutine call */	1026	/* setup coroutine call */
751	setup_coro (next);	1027	coro_setup (aTHX_ next);
752	/* need a new stack */
753	assert (!next->cctx);
754	}	1028	}
755	else	1029	else
756	{	1030	{
757	/* coroutine already started */	1031	/* coroutine already started */
758	save_perl (prev);	1032	save_perl (aTHX_ prev);
759	load_perl (next);	1033	load_perl (aTHX_ next);
760	}	1034	}
761		1035
762	prev__cctx = prev->cctx;	1036	prev__cctx = prev->cctx;
763		1037
764	/* possibly "free" the cctx */	1038	/* possibly "free" the cctx */
765	if (prev__cctx->idle_sp == STACKLEVEL)	1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
766	{	1040	{
767	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1041	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
768	assert (PL_top_env == prev__cctx->top_env);	1042	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
769		1043
770	prev->cctx = 0;	1044	prev->cctx = 0;
771		1045
772	cctx_put (prev__cctx);	1046	cctx_put (prev__cctx);
773	prev__cctx->inuse = 0;
774	}	1047	}
775		1048
		1049	++next->usecount;
		1050
776	if (!next->cctx)	1051	if (!next->cctx)
777	{
778	next->cctx = cctx_get ();	1052	next->cctx = cctx_get (aTHX);
779	assert (!next->cctx->inuse);
780	next->cctx->inuse = 1;
781	}
782		1053
783	if (prev__cctx != next->cctx)	1054	if (prev__cctx != next->cctx)
784	{	1055	{
785	prev__cctx->top_env = PL_top_env;	1056	prev__cctx->top_env = PL_top_env;
786	PL_top_env = next->cctx->top_env;	1057	PL_top_env = next->cctx->top_env;
787	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
788	}	1059	}
789		1060
790	free_coro_mortal ();	1061	free_coro_mortal (aTHX);
791
792	UNLOCK;	1062	UNLOCK;
793	}	1063	}
794	}	1064	}
795		1065
796	struct transfer_args	1066	struct transfer_args
797	{	1067	{
798	struct coro *prev, *next;	1068	struct coro *prev, *next;
799	};	1069	};
800		1070
801	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1071	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1072	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
802		1073
		1074	/** high level stuff ********************************************************/
		1075
803	static void	1076	static int
804	coro_state_destroy (struct coro *coro)	1077	coro_state_destroy (pTHX_ struct coro *coro)
805	{	1078	{
806	if (coro->refcnt--)	1079	if (coro->flags & CF_DESTROYED)
807	return;	1080	return 0;
		1081
		1082	coro->flags |= CF_DESTROYED;
		1083
		1084	if (coro->flags & CF_READY)
		1085	{
		1086	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1087	/* alternative: look through all ready queues and remove the coro */
		1088	LOCK;
		1089	--coro_nready;
		1090	UNLOCK;
		1091	}
		1092	else
		1093	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
808		1094
809	if (coro->mainstack && coro->mainstack != main_mainstack)	1095	if (coro->mainstack && coro->mainstack != main_mainstack)
810	{	1096	{
811	struct coro temp;	1097	struct coro temp;
812	Zero (&temp, 1, struct coro);
813	temp.save = CORO_SAVE_ALL;
814		1098
815	if (coro->flags & CF_RUNNING)	1099	if (coro->flags & CF_RUNNING)
816	croak ("FATAL: tried to destroy currently running coroutine");	1100	croak ("FATAL: tried to destroy currently running coroutine");
817		1101
818	save_perl (&temp);	1102	save_perl (aTHX_ &temp);
819	load_perl (coro);	1103	load_perl (aTHX_ coro);
820		1104
821	coro_destroy_stacks ();	1105	coro_destroy (aTHX_ coro);
822		1106
823	load_perl (&temp); /* this will get rid of defsv etc.. */	1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
824		1108
825	coro->mainstack = 0;	1109	coro->mainstack = 0;
826	}	1110	}
827		1111
828	cctx_destroy (coro->cctx);	1112	cctx_destroy (coro->cctx);
829	SvREFCNT_dec (coro->args);	1113	SvREFCNT_dec (coro->args);
830	Safefree (coro);	1114
		1115	if (coro->next) coro->next->prev = coro->prev;
		1116	if (coro->prev) coro->prev->next = coro->next;
		1117	if (coro == coro_first) coro_first = coro->next;
		1118
		1119	return 1;
831	}	1120	}
832		1121
833	static int	1122	static int
834	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1123	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
835	{	1124	{
836	struct coro *coro = (struct coro *)mg->mg_ptr;	1125	struct coro *coro = (struct coro *)mg->mg_ptr;
837	mg->mg_ptr = 0;	1126	mg->mg_ptr = 0;
838		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
839	coro_state_destroy (coro);	1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
840		1135
841	return 0;	1136	return 0;
842	}	1137	}
843		1138
844	static int	1139	static int
…		…
851	return 0;	1146	return 0;
852	}	1147	}
853		1148
854	static MGVTBL coro_state_vtbl = {	1149	static MGVTBL coro_state_vtbl = {
855	0, 0, 0, 0,	1150	0, 0, 0, 0,
856	coro_state_clear,	1151	coro_state_free,
857	0,	1152	0,
858	#ifdef MGf_DUP	1153	#ifdef MGf_DUP
859	coro_state_dup,	1154	coro_state_dup,
860	#else	1155	#else
861	# define MGf_DUP 0	1156	# define MGf_DUP 0
862	#endif	1157	#endif
863	};	1158	};
864		1159
865	static struct coro *
866	SvSTATE (SV *coro)
867	{
868	HV *stash;
869	MAGIC *mg;
870
871	if (SvROK (coro))
872	coro = SvRV (coro);
873
874	stash = SvSTASH (coro);
875	if (stash != coro_stash && stash != coro_state_stash)
876	{
877	/* very slow, but rare, check */
878	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
879	croak ("Coro::State object required");
880	}
881
882	mg = SvMAGIC (coro);
883	assert (mg->mg_type == PERL_MAGIC_ext);
884	return (struct coro *)mg->mg_ptr;
885	}
886
887	static void	1160	static void
888	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1161	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
889	{	1162	{
890	ta->prev = SvSTATE (prev_sv);	1163	ta->prev = SvSTATE (prev_sv);
891	ta->next = SvSTATE (next_sv);	1164	ta->next = SvSTATE (next_sv);
		1165	TRANSFER_CHECK (*ta);
892	}	1166	}
893		1167
894	static void	1168	static void
895	api_transfer (SV *prev_sv, SV *next_sv)	1169	api_transfer (SV *prev_sv, SV *next_sv)
896	{	1170	{
		1171	dTHX;
897	struct transfer_args ta;	1172	struct transfer_args ta;
898		1173
899	prepare_transfer (&ta, prev_sv, next_sv);	1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900	TRANSFER (ta);	1175	TRANSFER (ta);
901	}	1176	}
902		1177
903	static int
904	api_save (SV *coro_sv, int new_save)
905	{
906	struct coro *coro = SvSTATE (coro_sv);
907	int old_save = coro->save;
908
909	if (new_save >= 0)
910	coro->save = new_save;
911
912	return old_save;
913	}
914
915	/** Coro ********************************************************************/	1178	/** Coro ********************************************************************/
916		1179
917	#define PRIO_MAX 3
918	#define PRIO_HIGH 1
919	#define PRIO_NORMAL 0
920	#define PRIO_LOW -1
921	#define PRIO_IDLE -3
922	#define PRIO_MIN -4
923
924	/* for Coro.pm */
925	static SV *coro_current;
926	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
927	static int coro_nready;
928
929	static void	1180	static void
930	coro_enq (SV *coro_sv)	1181	coro_enq (pTHX_ SV *coro_sv)
931	{	1182	{
932	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1183	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
933	coro_nready++;
934	}	1184	}
935		1185
936	static SV *	1186	static SV *
937	coro_deq (int min_prio)	1187	coro_deq (pTHX_ int min_prio)
938	{	1188	{
939	int prio = PRIO_MAX - PRIO_MIN;	1189	int prio = PRIO_MAX - PRIO_MIN;
940		1190
941	min_prio -= PRIO_MIN;	1191	min_prio -= PRIO_MIN;
942	if (min_prio < 0)	1192	if (min_prio < 0)
943	min_prio = 0;	1193	min_prio = 0;
944		1194
945	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
946	if (AvFILLp (coro_ready [prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
947	{
948	coro_nready--;
949	return av_shift (coro_ready [prio]);	1197	return av_shift (coro_ready [prio]);
950	}
951		1198
952	return 0;	1199	return 0;
953	}	1200	}
954		1201
955	static int	1202	static int
956	api_ready (SV *coro_sv)	1203	api_ready (SV *coro_sv)
957	{	1204	{
		1205	dTHX;
958	struct coro *coro;	1206	struct coro *coro;
959		1207
960	if (SvROK (coro_sv))	1208	if (SvROK (coro_sv))
961	coro_sv = SvRV (coro_sv);	1209	coro_sv = SvRV (coro_sv);
962		1210
963	coro = SvSTATE (coro_sv);	1211	coro = SvSTATE (coro_sv);
964		1212
965	if (coro->flags & CF_READY)	1213	if (coro->flags & CF_READY)
966	return 0;	1214	return 0;
967		1215
968	#if 0 /* this is actually harmless */
969	if (coro->flags & CF_RUNNING)
970	croak ("Coro::ready called on currently running coroutine");
971	#endif
972
973	coro->flags |= CF_READY;	1216	coro->flags |= CF_READY;
974		1217
975	LOCK;	1218	LOCK;
976	coro_enq (SvREFCNT_inc (coro_sv));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1220	++coro_nready;
977	UNLOCK;	1221	UNLOCK;
978		1222
979	return 1;	1223	return 1;
980	}	1224	}
981		1225
982	static int	1226	static int
983	api_is_ready (SV *coro_sv)	1227	api_is_ready (SV *coro_sv)
984	{	1228	{
		1229	dTHX;
985	return !!SvSTATE (coro_sv)->flags & CF_READY;	1230	return !!(SvSTATE (coro_sv)->flags & CF_READY);
986	}	1231	}
987		1232
988	static void	1233	static void
989	prepare_schedule (struct transfer_args *ta)	1234	prepare_schedule (pTHX_ struct transfer_args *ta)
990	{	1235	{
991	SV *prev, *next;	1236	SV *prev_sv, *next_sv;
992		1237
993	for (;;)	1238	for (;;)
994	{	1239	{
995	LOCK;	1240	LOCK;
996	next = coro_deq (PRIO_MIN);	1241	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1242
		1243	/* nothing to schedule: call the idle handler */
		1244	if (!next_sv)
		1245	{
		1246	dSP;
		1247	UNLOCK;
		1248
		1249	ENTER;
		1250	SAVETMPS;
		1251
		1252	PUSHMARK (SP);
		1253	PUTBACK;
		1254	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1255
		1256	FREETMPS;
		1257	LEAVE;
		1258	continue;
		1259	}
		1260
		1261	ta->next = SvSTATE (next_sv);
		1262
		1263	/* cannot transfer to destroyed coros, skip and look for next */
		1264	if (ta->next->flags & CF_DESTROYED)
		1265	{
		1266	UNLOCK;
		1267	SvREFCNT_dec (next_sv);
		1268	/* coro_nready is already taken care of by destroy */
		1269	continue;
		1270	}
		1271
		1272	--coro_nready;
997	UNLOCK;	1273	UNLOCK;
998
999	if (next)
1000	break;	1274	break;
1001
1002	{
1003	dSP;
1004
1005	ENTER;
1006	SAVETMPS;
1007
1008	PUSHMARK (SP);
1009	PUTBACK;
1010	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1011
1012	FREETMPS;
1013	LEAVE;
1014	}	1275	}
1015	}
1016
1017	prev = SvRV (coro_current);
1018	SvRV_set (coro_current, next);
1019		1276
1020	/* free this only after the transfer */	1277	/* free this only after the transfer */
1021	LOCK;	1278	prev_sv = SvRV (coro_current);
1022	free_coro_mortal ();
1023	UNLOCK;
1024	coro_mortal = prev;
1025
1026	assert (!SvROK(prev));//D
1027	assert (!SvROK(next));//D
1028
1029	ta->prev = SvSTATE (prev);	1279	ta->prev = SvSTATE (prev_sv);
1030	ta->next = SvSTATE (next);	1280	TRANSFER_CHECK (*ta);
1031
1032	assert (ta->next->flags & CF_READY);	1281	assert (ta->next->flags & CF_READY);
1033	ta->next->flags &= ~CF_READY;	1282	ta->next->flags &= ~CF_READY;
1034	}	1283	SvRV_set (coro_current, next_sv);
1035		1284
		1285	LOCK;
		1286	free_coro_mortal (aTHX);
		1287	coro_mortal = prev_sv;
		1288	UNLOCK;
		1289	}
		1290
1036	static void	1291	static void
1037	prepare_cede (struct transfer_args *ta)	1292	prepare_cede (pTHX_ struct transfer_args *ta)
1038	{	1293	{
1039	api_ready (coro_current);	1294	api_ready (coro_current);
1040
1041	prepare_schedule (ta);	1295	prepare_schedule (aTHX_ ta);
		1296	}
		1297
		1298	static int
		1299	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1300	{
		1301	if (coro_nready)
		1302	{
		1303	SV *prev = SvRV (coro_current);
		1304	prepare_schedule (aTHX_ ta);
		1305	api_ready (prev);
		1306	return 1;
		1307	}
		1308	else
		1309	return 0;
1042	}	1310	}
1043		1311
1044	static void	1312	static void
1045	api_schedule (void)	1313	api_schedule (void)
1046	{	1314	{
		1315	dTHX;
1047	struct transfer_args ta;	1316	struct transfer_args ta;
1048		1317
1049	prepare_schedule (&ta);	1318	prepare_schedule (aTHX_ &ta);
1050	TRANSFER (ta);	1319	TRANSFER (ta);
1051	}	1320	}
1052		1321
1053	static void	1322	static int
1054	api_cede (void)	1323	api_cede (void)
1055	{	1324	{
		1325	dTHX;
1056	struct transfer_args ta;	1326	struct transfer_args ta;
1057		1327
1058	prepare_cede (&ta);	1328	prepare_cede (aTHX_ &ta);
		1329
		1330	if (ta.prev != ta.next)
		1331	{
1059	TRANSFER (ta);	1332	TRANSFER (ta);
		1333	return 1;
		1334	}
		1335	else
		1336	return 0;
1060	}	1337	}
1061		1338
		1339	static int
		1340	api_cede_notself (void)
		1341	{
		1342	dTHX;
		1343	struct transfer_args ta;
		1344
		1345	if (prepare_cede_notself (aTHX_ &ta))
		1346	{
		1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
		1352	}
		1353
		1354	static void
		1355	api_trace (SV *coro_sv, int flags)
		1356	{
		1357	dTHX;
		1358	struct coro *coro = SvSTATE (coro_sv);
		1359
		1360	if (flags & CC_TRACE)
		1361	{
		1362	if (!coro->cctx)
		1363	coro->cctx = cctx_new ();
		1364	else if (!(coro->cctx->flags & CC_TRACE))
		1365	croak ("cannot enable tracing on coroutine with custom stack");
		1366
		1367	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1368	}
		1369	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1370	{
		1371	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1372
		1373	if (coro->flags & CF_RUNNING)
		1374	PL_runops = RUNOPS_DEFAULT;
		1375	else
		1376	coro->runops = RUNOPS_DEFAULT;
		1377	}
		1378	}
		1379
1062	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1063		1381
1064	PROTOTYPES: DISABLE	1382	PROTOTYPES: DISABLE
1065		1383
1066	BOOT:	1384	BOOT:
1067	{	1385	{
1068	#ifdef USE_ITHREADS	1386	#ifdef USE_ITHREADS
1069	MUTEX_INIT (&coro_mutex);	1387	MUTEX_INIT (&coro_mutex);
1070	#endif	1388	#endif
1071	BOOT_PAGESIZE;	1389	BOOT_PAGESIZE;
1072		1390
		1391	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1392
1073	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1393	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1074		1394
		1395	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1396	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1075	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1076	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1077	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1078	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1079	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1080		1399
1081	main_mainstack = PL_mainstack;	1400	main_mainstack = PL_mainstack;
		1401	main_top_env = PL_top_env;
		1402
		1403	while (main_top_env->je_prev)
		1404	main_top_env = main_top_env->je_prev;
1082		1405
1083	coroapi.ver = CORO_API_VERSION;	1406	coroapi.ver = CORO_API_VERSION;
1084	coroapi.transfer = api_transfer;	1407	coroapi.transfer = api_transfer;
1085		1408
1086	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1409	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1093	struct coro *coro;	1416	struct coro *coro;
1094	HV *hv;	1417	HV *hv;
1095	int i;	1418	int i;
1096		1419
1097	Newz (0, coro, 1, struct coro);	1420	Newz (0, coro, 1, struct coro);
1098	coro->args = newAV ();	1421	coro->args = newAV ();
1099	coro->save = CORO_SAVE_ALL;
1100	coro->flags = CF_NEW;	1422	coro->flags = CF_NEW;
1101		1423
		1424	if (coro_first) coro_first->prev = coro;
		1425	coro->next = coro_first;
		1426	coro_first = coro;
		1427
1102	hv = newHV ();	1428	coro->hv = hv = newHV ();
1103	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1429	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1104	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1430	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1105		1431
1106	for (i = 1; i < items; i++)	1432	for (i = 1; i < items; i++)
1107	av_push (coro->args, newSVsv (ST (i)));	1433	av_push (coro->args, newSVsv (ST (i)));
1108	}	1434	}
1109	OUTPUT:	1435	OUTPUT:
1110	RETVAL	1436	RETVAL
1111		1437
1112	int	1438	# these not obviously related functions are all rolled into the same xs
1113	save (SV *coro, int new_save = -1)	1439	# function to increase chances that they all will call transfer with the same
1114	CODE:	1440	# stack offset
1115	RETVAL = api_save (coro, new_save);
1116	OUTPUT:
1117	RETVAL
1118
1119	void	1441	void
1120	_set_stacklevel (...)	1442	_set_stacklevel (...)
1121	ALIAS:	1443	ALIAS:
1122	Coro::State::transfer = 1	1444	Coro::State::transfer = 1
1123	Coro::schedule = 2	1445	Coro::schedule = 2
1124	Coro::cede = 3	1446	Coro::cede = 3
		1447	Coro::cede_notself = 4
1125	CODE:	1448	CODE:
1126	{	1449	{
1127	struct transfer_args ta;	1450	struct transfer_args ta;
1128		1451
1129	switch (ix)	1452	switch (ix)
…		…
1135		1458
1136	case 1:	1459	case 1:
1137	if (items != 2)	1460	if (items != 2)
1138	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1461	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1139		1462
1140	prepare_transfer (&ta, ST (0), ST (1));	1463	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1141	break;	1464	break;
1142		1465
1143	case 2:	1466	case 2:
1144	prepare_schedule (&ta);	1467	prepare_schedule (aTHX_ &ta);
1145	break;	1468	break;
1146		1469
1147	case 3:	1470	case 3:
1148	prepare_cede (&ta);	1471	prepare_cede (aTHX_ &ta);
		1472	break;
		1473
		1474	case 4:
		1475	if (!prepare_cede_notself (aTHX_ &ta))
		1476	XSRETURN_EMPTY;
		1477
1149	break;	1478	break;
1150	}	1479	}
1151		1480
		1481	BARRIER;
1152	TRANSFER (ta);	1482	TRANSFER (ta);
1153	}
1154		1483
1155	void	1484	if (GIMME_V != G_VOID && ta.next != ta.prev)
1156	_clone_state_from (SV *dst, SV *src)	1485	XSRETURN_YES;
		1486	}
		1487
		1488	bool
		1489	_destroy (SV *coro_sv)
1157	CODE:	1490	CODE:
1158	{	1491	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1159	struct coro *coro_src = SvSTATE (src);	1492	OUTPUT:
1160		1493	RETVAL
1161	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1162
1163	++coro_src->refcnt;
1164	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1165	}
1166		1494
1167	void	1495	void
1168	_exit (code)	1496	_exit (code)
1169	int code	1497	int code
1170	PROTOTYPE: $	1498	PROTOTYPE: $
1171	CODE:	1499	CODE:
1172	_exit (code);	1500	_exit (code);
1173		1501
1174	int	1502	int
		1503	cctx_stacksize (int new_stacksize = 0)
		1504	CODE:
		1505	RETVAL = coro_stacksize;
		1506	if (new_stacksize)
		1507	coro_stacksize = new_stacksize;
		1508	OUTPUT:
		1509	RETVAL
		1510
		1511	int
1175	cctx_count ()	1512	cctx_count ()
1176	CODE:	1513	CODE:
1177	RETVAL = cctx_count;	1514	RETVAL = cctx_count;
1178	OUTPUT:	1515	OUTPUT:
1179	RETVAL	1516	RETVAL
…		…
1183	CODE:	1520	CODE:
1184	RETVAL = cctx_idle;	1521	RETVAL = cctx_idle;
1185	OUTPUT:	1522	OUTPUT:
1186	RETVAL	1523	RETVAL
1187		1524
		1525	void
		1526	list ()
		1527	PPCODE:
		1528	{
		1529	struct coro *coro;
		1530	for (coro = coro_first; coro; coro = coro->next)
		1531	if (coro->hv)
		1532	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1533	}
		1534
		1535	void
		1536	call (Coro::State coro, SV *coderef)
		1537	ALIAS:
		1538	eval = 1
		1539	CODE:
		1540	{
		1541	if (coro->mainstack)
		1542	{
		1543	struct coro temp;
		1544	Zero (&temp, 1, struct coro);
		1545
		1546	if (!(coro->flags & CF_RUNNING))
		1547	{
		1548	save_perl (aTHX_ &temp);
		1549	load_perl (aTHX_ coro);
		1550	}
		1551
		1552	{
		1553	dSP;
		1554	ENTER;
		1555	SAVETMPS;
		1556	PUSHMARK (SP);
		1557	PUTBACK;
		1558	if (ix)
		1559	eval_sv (coderef, 0);
		1560	else
		1561	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1562	SPAGAIN;
		1563	FREETMPS;
		1564	LEAVE;
		1565	PUTBACK;
		1566	}
		1567
		1568	if (!(coro->flags & CF_RUNNING))
		1569	{
		1570	save_perl (aTHX_ coro);
		1571	load_perl (aTHX_ &temp);
		1572	}
		1573	}
		1574	}
		1575
		1576	SV *
		1577	is_ready (Coro::State coro)
		1578	PROTOTYPE: $
		1579	ALIAS:
		1580	is_ready = CF_READY
		1581	is_running = CF_RUNNING
		1582	is_new = CF_NEW
		1583	is_destroyed = CF_DESTROYED
		1584	CODE:
		1585	RETVAL = boolSV (coro->flags & ix);
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	void
		1590	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1591
		1592	SV *
		1593	has_stack (Coro::State coro)
		1594	PROTOTYPE: $
		1595	CODE:
		1596	RETVAL = boolSV (!!coro->cctx);
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	int
		1601	is_traced (Coro::State coro)
		1602	PROTOTYPE: $
		1603	CODE:
		1604	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1605	OUTPUT:
		1606	RETVAL
		1607
		1608	IV
		1609	rss (Coro::State coro)
		1610	PROTOTYPE: $
		1611	ALIAS:
		1612	usecount = 1
		1613	CODE:
		1614	switch (ix)
		1615	{
		1616	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1617	case 1: RETVAL = coro->usecount; break;
		1618	}
		1619	OUTPUT:
		1620	RETVAL
		1621
		1622
1188	MODULE = Coro::State PACKAGE = Coro	1623	MODULE = Coro::State PACKAGE = Coro
1189		1624
1190	BOOT:	1625	BOOT:
1191	{	1626	{
1192	int i;	1627	int i;
		1628
		1629	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1630	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1631	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1632
		1633	coro_current = get_sv ("Coro::current", FALSE);
		1634	SvREADONLY_on (coro_current);
1193		1635
1194	coro_stash = gv_stashpv ("Coro", TRUE);	1636	coro_stash = gv_stashpv ("Coro", TRUE);
1195		1637
1196	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1638	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1197	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1639	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1198	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1640	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1199	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1641	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1200	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1642	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1201	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1643	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1202		1644
1203	coro_current = get_sv ("Coro::current", FALSE);
1204	SvREADONLY_on (coro_current);
1205
1206	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1645	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1207	coro_ready[i] = newAV ();	1646	coro_ready[i] = newAV ();
1208		1647
1209	{	1648	{
1210	SV *sv = perl_get_sv("Coro::API", 1);	1649	SV *sv = perl_get_sv("Coro::API", 1);
1211		1650
1212	coroapi.schedule = api_schedule;	1651	coroapi.schedule = api_schedule;
1213	coroapi.save = api_save;
1214	coroapi.cede = api_cede;	1652	coroapi.cede = api_cede;
		1653	coroapi.cede_notself = api_cede_notself;
1215	coroapi.ready = api_ready;	1654	coroapi.ready = api_ready;
1216	coroapi.is_ready = api_is_ready;	1655	coroapi.is_ready = api_is_ready;
1217	coroapi.nready = &coro_nready;	1656	coroapi.nready = &coro_nready;
1218	coroapi.current = coro_current;	1657	coroapi.current = coro_current;
1219		1658
1220	GCoroAPI = &coroapi;	1659	GCoroAPI = &coroapi;
1221	sv_setiv (sv, (IV)&coroapi);	1660	sv_setiv (sv, (IV)&coroapi);
1222	SvREADONLY_on (sv);	1661	SvREADONLY_on (sv);
1223	}	1662	}
…		…
1239	RETVAL = coro->prio;	1678	RETVAL = coro->prio;
1240		1679
1241	if (items > 1)	1680	if (items > 1)
1242	{	1681	{
1243	if (ix)	1682	if (ix)
1244	newprio += coro->prio;	1683	newprio = coro->prio - newprio;
1245		1684
1246	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1685	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1247	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1686	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1248		1687
1249	coro->prio = newprio;	1688	coro->prio = newprio;
1250	}	1689	}
1251	}	1690	}
		1691	OUTPUT:
		1692	RETVAL
1252		1693
1253	SV *	1694	SV *
1254	ready (SV *self)	1695	ready (SV *self)
1255	PROTOTYPE: $	1696	PROTOTYPE: $
1256	CODE:	1697	CODE:
1257	RETVAL = boolSV (api_ready (self));	1698	RETVAL = boolSV (api_ready (self));
1258	OUTPUT:	1699	OUTPUT:
1259	RETVAL	1700	RETVAL
1260		1701
1261	SV *
1262	is_ready (SV *self)
1263	PROTOTYPE: $
1264	CODE:
1265	RETVAL = boolSV (api_is_ready (self));
1266	OUTPUT:
1267	RETVAL
1268
1269	int	1702	int
1270	nready (...)	1703	nready (...)
1271	PROTOTYPE:	1704	PROTOTYPE:
1272	CODE:	1705	CODE:
1273	RETVAL = coro_nready;	1706	RETVAL = coro_nready;
1274	OUTPUT:	1707	OUTPUT:
1275	RETVAL	1708	RETVAL
1276		1709
		1710	# for async_pool speedup
		1711	void
		1712	_pool_1 (SV *cb)
		1713	CODE:
		1714	{
		1715	struct coro *coro = SvSTATE (coro_current);
		1716	HV *hv = (HV *)SvRV (coro_current);
		1717	AV *defav = GvAV (PL_defgv);
		1718	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1719	AV *invoke_av;
		1720	int i, len;
		1721
		1722	if (!invoke)
		1723	croak ("\3terminate\2\n");
		1724
		1725	SvREFCNT_dec (coro->saved_deffh);
		1726	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1727
		1728	hv_store (hv, "desc", sizeof ("desc") - 1,
		1729	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1730
		1731	invoke_av = (AV *)SvRV (invoke);
		1732	len = av_len (invoke_av);
		1733
		1734	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1735
		1736	if (len > 0)
		1737	{
		1738	av_fill (defav, len - 1);
		1739	for (i = 0; i < len; ++i)
		1740	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1741	}
		1742
		1743	SvREFCNT_dec (invoke);
		1744	}
		1745
		1746	void
		1747	_pool_2 (SV *cb)
		1748	CODE:
		1749	{
		1750	struct coro *coro = SvSTATE (coro_current);
		1751
		1752	sv_setsv (cb, &PL_sv_undef);
		1753
		1754	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1755	coro->saved_deffh = 0;
		1756
		1757	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1758	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1759	croak ("\3terminate\2\n");
		1760
		1761	av_clear (GvAV (PL_defgv));
		1762	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1763	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1764
		1765	coro->prio = 0;
		1766
		1767	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1768	api_trace (coro_current, 0);
		1769
		1770	av_push (av_async_pool, newSVsv (coro_current));
		1771	}
		1772
		1773
1277	MODULE = Coro::State PACKAGE = Coro::AIO	1774	MODULE = Coro::State PACKAGE = Coro::AIO
1278		1775
1279	SV *	1776	SV *
1280	_get_state ()	1777	_get_state ()
1281	CODE:	1778	CODE:

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