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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 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 */
118		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
119	static struct coro_cctx *cctx_first;	144	static struct coro_cctx *cctx_first;
120	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	};
121		155
122	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
123	typedef struct coro_cctx {	157	typedef struct coro_cctx {
124	struct coro_cctx *next;	158	struct coro_cctx *next;
125		159
126	/* the stack */	160	/* the stack */
127	void *sptr;	161	void *sptr;
128	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
129		163
130	/* cpu state */	164	/* cpu state */
131	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 */
132	JMPENV *top_env;	167	JMPENV *top_env;
133	coro_context cctx;	168	coro_context cctx;
134		169
135	int inuse;
136
137	#if USE_VALGRIND	170	#if CORO_USE_VALGRIND
138	int valgrind_id;	171	int valgrind_id;
139	#endif	172	#endif
		173	unsigned char flags;
140	} coro_cctx;	174	} coro_cctx;
141		175
142	enum {	176	enum {
143	CF_RUNNING = 0x0001, /* coroutine is running */	177	CF_RUNNING = 0x0001, /* coroutine is running */
144	CF_READY = 0x0002, /* coroutine is ready */	178	CF_READY = 0x0002, /* coroutine is ready */
145	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 */
146	};	181	};
147		182
148	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
149	struct coro {	184	struct coro {
150	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
151	coro_cctx *cctx;	186	coro_cctx *cctx;
152		187
153	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
154	AV *args;	189	AV *args;
155	int refcnt;	190	int refcnt;
156	int flags;	191	int flags; /* CF_ flags */
157		192
158	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
159	AV *defav;	194	AV *defav; /* @_ */
160	SV *defsv;	195	SV *defsv; /* $_ */
161	SV *errsv;	196	SV *errsv; /* $@ */
		197	IO *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
162		200
163	#define VAR(name,type) type name;	201	#define VAR(name,type) type name;
164	# include "state.h"	202	# include "state.h"
165	#undef VAR	203	#undef VAR
166		204
		205	/* statistics */
		206	int usecount; /* number of switches to this coro */
		207
167	/* coro process data */	208	/* coro process data */
168	int prio;	209	int prio;
		210
		211	/* linked list */
		212	struct coro *next, *prev;
		213	HV *hv; /* the perl hash associated with this coro, if any */
169	};	214	};
170		215
171	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
172	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
173		218
		219	/** Coro ********************************************************************/
		220
		221	#define PRIO_MAX 3
		222	#define PRIO_HIGH 1
		223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/** lowlevel stuff **********************************************************/
		235
174	static AV *	236	static AV *
175	coro_clone_padlist (CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
176	{	238	{
177	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
178	AV *newpadlist, *newpad;	240	AV *newpadlist, *newpad;
179		241
180	newpadlist = newAV ();	242	newpadlist = newAV ();
…		…
192		254
193	return newpadlist;	255	return newpadlist;
194	}	256	}
195		257
196	static void	258	static void
197	free_padlist (AV *padlist)	259	free_padlist (pTHX_ AV *padlist)
198	{	260	{
199	/* may be during global destruction */	261	/* may be during global destruction */
200	if (SvREFCNT (padlist))	262	if (SvREFCNT (padlist))
201	{	263	{
202	I32 i = AvFILLp (padlist);	264	I32 i = AvFILLp (padlist);
…		…
223	AV *padlist;	285	AV *padlist;
224	AV *av = (AV *)mg->mg_obj;	286	AV *av = (AV *)mg->mg_obj;
225		287
226	/* casting is fun. */	288	/* casting is fun. */
227	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	289	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
228	free_padlist (padlist);	290	free_padlist (aTHX_ padlist);
229		291
230	SvREFCNT_dec (av);	292	SvREFCNT_dec (av);
231		293
232	return 0;	294	return 0;
233	}	295	}
…		…
241	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
242	? SvMAGIC (cv) \	304	? SvMAGIC (cv) \
243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
244	: 0	306	: 0
245		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		333
246	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
247	static void	335	static void
248	get_padlist (CV *cv)	336	get_padlist (pTHX_ CV *cv)
249	{	337	{
250	MAGIC *mg = CORO_MAGIC (cv);	338	MAGIC *mg = CORO_MAGIC (cv);
251	AV *av;	339	AV *av;
252		340
253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
255	else	343	else
256	{	344	{
257	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
258	/* this is probably cleaner, but also slower? */	346	/* this is probably cleaner, but also slower? */
259	CV *cp = Perl_cv_clone (cv);	347	CV *cp = Perl_cv_clone (cv);
260	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
261	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
262	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
263	#else	351	#else
264	CvPADLIST (cv) = coro_clone_padlist (cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
265	#endif	353	#endif
266	}	354	}
267	}	355	}
268		356
269	static void	357	static void
270	put_padlist (CV *cv)	358	put_padlist (pTHX_ CV *cv)
271	{	359	{
272	MAGIC *mg = CORO_MAGIC (cv);	360	MAGIC *mg = CORO_MAGIC (cv);
273	AV *av;	361	AV *av;
274		362
275	if (!mg)	363	if (!mg)
…		…
286	av_extend (av, AvMAX (av) + 1);	374	av_extend (av, AvMAX (av) + 1);
287		375
288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
289	}	377	}
290		378
291	#define SB do {	379	/** load & save, init *******************************************************/
292	#define SE } while (0)
293		380
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
298
299	static void	381	static void
300	load_state (Coro__State c)	382	load_perl (pTHX_ Coro__State c)
301	{	383	{
302	#define VAR(name,type) PL_ ## name = c->name;	384	#define VAR(name,type) PL_ ## name = c->name;
303	# include "state.h"	385	# include "state.h"
304	#undef VAR	386	#undef VAR
305		387
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	388	GvSV (PL_defgv) = c->defsv;
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	389	GvAV (PL_defgv) = c->defav;
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	390	GvSV (PL_errgv) = c->errsv;
		391	PL_defoutgv = c->deffh;
		392	PL_rs = c->irssv;
		393	GvSV (irsgv) = c->irssv_sv;
309		394
310	{	395	{
311	dSP;	396	dSP;
312	CV *cv;	397	CV *cv;
313		398
314	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
316	{	401	{
317	put_padlist (cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
318	CvDEPTH (cv) = PTR2IV (POPs);	403	CvDEPTH (cv) = PTR2IV (POPs);
319	CvPADLIST (cv) = (AV *)POPs;	404	CvPADLIST (cv) = (AV *)POPs;
320	}	405	}
321		406
322	PUTBACK;	407	PUTBACK;
323	}	408	}
324	}	409	}
325		410
326	static void	411	static void
327	save_state (Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
328	{	413	{
329	{	414	{
330	dSP;	415	dSP;
331	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
332	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
335	/*	420	/*
336	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
337	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
338	*/	423	*/
339		424
340	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
341	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
342	for (;;)	427	for (;;)
343	{	428	{
344	while (cxix >= 0)	429	while (cxix >= 0)
345	{	430	{
346	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
347		432
348	if (CxTYPE (cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
349	{	434	{
350	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
351		436
352	if (CvDEPTH (cv))	437	if (CvDEPTH (cv))
353	{	438	{
354	EXTEND (SP, 3);	439	EXTEND (SP, 3);
355
356	PUSHs ((SV *)CvPADLIST (cv));	440	PUSHs ((SV *)CvPADLIST (cv));
357	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
358	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
359		443
360	CvDEPTH (cv) = 0;	444	CvDEPTH (cv) = 0;
361	get_padlist (cv);	445	get_padlist (aTHX_ cv);
362	}	446	}
363	}	447	}
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	}	448	}
373		449
374	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
375	break;	451	break;
376		452
377	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
378	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
379	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
380	}	456	}
381		457
382	PUTBACK;	458	PUTBACK;
383	}	459	}
384		460
385	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
386	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
387	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = PL_defoutgv;
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
388		467
389	#define VAR(name,type)c->name = PL_ ## name;	468	#define VAR(name,type)c->name = PL_ ## name;
390	# include "state.h"	469	# include "state.h"
391	#undef VAR	470	#undef VAR
392	}	471	}
…		…
395	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
396	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
397	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
398	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
399	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
400	static void	482	static void
401	coro_init_stacks ()	483	coro_init_stacks (pTHX)
402	{	484	{
403	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	485	PL_curstackinfo = new_stackinfo(64, 6);
404	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
405	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
406	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
407		489
408	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
409	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
410	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
411		493
412	New(50,PL_tmps_stack,128,SV*);	494	New(50,PL_tmps_stack,64,SV*);
413	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
414	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
415	PL_tmps_max = 128;	497	PL_tmps_max = 64;
416		498
417	New(54,PL_markstack,32,I32);	499	New(54,PL_markstack,16,I32);
418	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
419	PL_markstack_max = PL_markstack + 32;	501	PL_markstack_max = PL_markstack + 16;
420		502
421	#ifdef SET_MARK_OFFSET	503	#ifdef SET_MARK_OFFSET
422	SET_MARK_OFFSET;	504	SET_MARK_OFFSET;
423	#endif	505	#endif
424		506
425	New(54,PL_scopestack,32,I32);	507	New(54,PL_scopestack,16,I32);
426	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
427	PL_scopestack_max = 32;	509	PL_scopestack_max = 16;
428		510
429	New(54,PL_savestack,64,ANY);	511	New(54,PL_savestack,64,ANY);
430	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
431	PL_savestack_max = 64;	513	PL_savestack_max = 64;
432		514
433	#if !PERL_VERSION_ATLEAST (5,9,0)	515	#if !PERL_VERSION_ATLEAST (5,9,0)
434	New(54,PL_retstack,16,OP*);	516	New(54,PL_retstack,4,OP*);
435	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
436	PL_retstack_max = 16;	518	PL_retstack_max = 4;
437	#endif	519	#endif
438	}	520	}
		521	#endif
439		522
440	/*	523	/*
441	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
442	*/	525	*/
443	static void	526	static void
444	coro_destroy_stacks ()	527	coro_destroy_stacks (pTHX)
445	{	528	{
446	if (!IN_DESTRUCT)
447	{
448	/* is this ugly, I ask? */
449	LEAVE_SCOPE (0);
450
451	/* sure it is, but more important: is it correct?? :/ */
452	FREETMPS;
453
454	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
455	}
456
457	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
458	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
459		531
460	while (PL_curstackinfo)	532	while (PL_curstackinfo)
461	{	533	{
462	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
463		535
464	{ /*D*//*remove*/
465	dSP;
466	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
467	PUTBACK; /* possibly superfluous */
468	}
469
470	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
471	{
472	dounwind (-1);/*D*//*remove*/
473	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
474	}
475		538
476	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
477	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
478	PL_curstackinfo = p;	541	PL_curstackinfo = p;
479	}	542	}
…		…
485	#if !PERL_VERSION_ATLEAST (5,9,0)	548	#if !PERL_VERSION_ATLEAST (5,9,0)
486	Safefree (PL_retstack);	549	Safefree (PL_retstack);
487	#endif	550	#endif
488	}	551	}
489		552
490	static void	553	static size_t
491	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 (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += 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)
492	{	588	{
493	/*	589	/*
494	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
495	*/	591	*/
496
497	coro_init_stacks ();	592	coro_init_stacks (aTHX);
498		593
		594	PL_runops = RUNOPS_DEFAULT;
499	PL_curcop = &PL_compiling;	595	PL_curcop = &PL_compiling;
500	PL_in_eval = EVAL_NULL;	596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
501	PL_curpm = 0;	598	PL_curpm = 0;
502	PL_localizing = 0;	599	PL_localizing = 0;
503	PL_dirty = 0;	600	PL_dirty = 0;
504	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 = newGVgen ("Coro");
		612	GvIOp(PL_defoutgv) = io;
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) |= IOf_FLUSH;
		616	}
505		617
506	{	618	{
507	dSP;	619	dSP;
508	LOGOP myop;	620	LOGOP myop;
509		621
510	SvREFCNT_dec (GvAV (PL_defgv));
511	GvAV (PL_defgv) = coro->args; coro->args = 0;
512
513	Zero (&myop, 1, LOGOP);	622	Zero (&myop, 1, LOGOP);
514	myop.op_next = Nullop;	623	myop.op_next = Nullop;
515	myop.op_flags = OPf_WANT_VOID;	624	myop.op_flags = OPf_WANT_VOID;
516		625
517	PUSHMARK (SP);	626	PUSHMARK (SP);
518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	627	XPUSHs (av_shift (GvAV (PL_defgv)));
519	PUTBACK;	628	PUTBACK;
520	PL_op = (OP *)&myop;	629	PL_op = (OP *)&myop;
521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	630	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
522	SPAGAIN;	631	SPAGAIN;
523	}	632	}
524		633
525	ENTER; /* necessary e.g. for dounwind */	634	ENTER; /* necessary e.g. for dounwind */
526	}	635	}
527		636
528	static void	637	static void
		638	coro_destroy (pTHX_ struct coro *coro)
		639	{
		640	if (!IN_DESTRUCT)
		641	{
		642	/* restore all saved variables and stuff */
		643	LEAVE_SCOPE (0);
		644	assert (PL_tmps_floor == -1);
		645
		646	/* free all temporaries */
		647	FREETMPS;
		648	assert (PL_tmps_ix == -1);
		649
		650	/* unwind all extra stacks */
		651	POPSTACK_TO (PL_mainstack);
		652
		653	/* unwind main stack */
		654	dounwind (-1);
		655	}
		656
		657	SvREFCNT_dec (GvSV (PL_defgv));
		658	SvREFCNT_dec (GvAV (PL_defgv));
		659	SvREFCNT_dec (GvSV (PL_errgv));
		660	SvREFCNT_dec (PL_defoutgv);
		661	SvREFCNT_dec (PL_rs);
		662	SvREFCNT_dec (GvSV (irsgv));
		663
		664	coro_destroy_stacks (aTHX);
		665	}
		666
		667	static void
529	free_coro_mortal ()	668	free_coro_mortal (pTHX)
530	{	669	{
531	if (coro_mortal)	670	if (coro_mortal)
532	{	671	{
533	SvREFCNT_dec (coro_mortal);	672	SvREFCNT_dec (coro_mortal);
534	coro_mortal = 0;	673	coro_mortal = 0;
535	}	674	}
536	}	675	}
537		676
		677	static int
		678	runops_trace (pTHX)
		679	{
		680	COP *oldcop = 0;
		681	int oldcxix = -2;
		682	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		683	coro_cctx *cctx = coro->cctx;
		684
		685	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		686	{
		687	PERL_ASYNC_CHECK ();
		688
		689	if (cctx->flags & CC_TRACE_ALL)
		690	{
		691	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		692	{
		693	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		694	SV **bot, **top;
		695	AV *av = newAV (); /* return values */
		696	SV **cb;
		697	dSP;
		698
		699	GV *gv = CvGV (cx->blk_sub.cv);
		700	SV *fullname = sv_2mortal (newSV (0));
		701	if (isGV (gv))
		702	gv_efullname3 (fullname, gv, 0);
		703
		704	bot = PL_stack_base + cx->blk_oldsp + 1;
		705	top = cx->blk_gimme == G_ARRAY ? SP + 1
		706	: cx->blk_gimme == G_SCALAR ? bot + 1
		707	: bot;
		708
		709	while (bot < top)
		710	av_push (av, SvREFCNT_inc (*bot++));
		711
		712	PL_runops = RUNOPS_DEFAULT;
		713	ENTER;
		714	SAVETMPS;
		715	EXTEND (SP, 3);
		716	PUSHMARK (SP);
		717	PUSHs (&PL_sv_no);
		718	PUSHs (fullname);
		719	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		720	PUTBACK;
		721	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		722	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		723	SPAGAIN;
		724	FREETMPS;
		725	LEAVE;
		726	PL_runops = runops_trace;
		727	}
		728
		729	if (oldcop != PL_curcop)
		730	{
		731	oldcop = PL_curcop;
		732
		733	if (PL_curcop != &PL_compiling)
		734	{
		735	SV **cb;
		736
		737	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		738	{
		739	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		740
		741	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		742	{
		743	runops_proc_t old_runops = PL_runops;
		744	dSP;
		745	GV *gv = CvGV (cx->blk_sub.cv);
		746	SV *fullname = sv_2mortal (newSV (0));
		747
		748	if (isGV (gv))
		749	gv_efullname3 (fullname, gv, 0);
		750
		751	PL_runops = RUNOPS_DEFAULT;
		752	ENTER;
		753	SAVETMPS;
		754	EXTEND (SP, 3);
		755	PUSHMARK (SP);
		756	PUSHs (&PL_sv_yes);
		757	PUSHs (fullname);
		758	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		759	PUTBACK;
		760	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		761	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		762	SPAGAIN;
		763	FREETMPS;
		764	LEAVE;
		765	PL_runops = runops_trace;
		766	}
		767
		768	oldcxix = cxstack_ix;
		769	}
		770
		771	if (cctx->flags & CC_TRACE_LINE)
		772	{
		773	dSP;
		774
		775	PL_runops = RUNOPS_DEFAULT;
		776	ENTER;
		777	SAVETMPS;
		778	EXTEND (SP, 3);
		779	PL_runops = RUNOPS_DEFAULT;
		780	PUSHMARK (SP);
		781	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		782	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		783	PUTBACK;
		784	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		785	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		786	SPAGAIN;
		787	FREETMPS;
		788	LEAVE;
		789	PL_runops = runops_trace;
		790	}
		791	}
		792	}
		793	}
		794	}
		795
		796	TAINT_NOT;
		797	return 0;
		798	}
		799
538	/* inject a fake call to Coro::State::_cctx_init into the execution */	800	/* inject a fake call to Coro::State::_cctx_init into the execution */
		801	/* _cctx_init should be careful, as it could be called at almost any time */
		802	/* during execution of a perl program */
539	static void NOINLINE	803	static void NOINLINE
540	prepare_cctx (coro_cctx *cctx)	804	prepare_cctx (pTHX_ coro_cctx *cctx)
541	{	805	{
542	dSP;	806	dSP;
543	LOGOP myop;	807	LOGOP myop;
		808
		809	PL_top_env = &PL_start_env;
		810
		811	if (cctx->flags & CC_TRACE)
		812	PL_runops = runops_trace;
544		813
545	Zero (&myop, 1, LOGOP);	814	Zero (&myop, 1, LOGOP);
546	myop.op_next = PL_op;	815	myop.op_next = PL_op;
547	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	816	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
548		817
…		…
554	PL_op = (OP *)&myop;	823	PL_op = (OP *)&myop;
555	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	824	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
556	SPAGAIN;	825	SPAGAIN;
557	}	826	}
558		827
		828	/*
		829	* this is a _very_ stripped down perl interpreter ;)
		830	*/
559	static void	831	static void
560	coro_run (void *arg)	832	coro_run (void *arg)
561	{	833	{
		834	dTHX;
		835
562	/* coro_run is the alternative tail of transfer(), so unlock here. */	836	/* coro_run is the alternative tail of transfer(), so unlock here. */
563	UNLOCK;	837	UNLOCK;
564		838
565	/*	839	/* we now skip the entersub that lead to transfer() */
566	* this is a _very_ stripped down perl interpreter ;)	840	PL_op = PL_op->op_next;
567	*/
568	PL_top_env = &PL_start_env;
569		841
570	/* inject call to cctx_init */	842	/* inject a fake subroutine call to cctx_init */
571	prepare_cctx ((coro_cctx *)arg);	843	prepare_cctx (aTHX_ (coro_cctx *)arg);
572		844
573	/* somebody will hit me for both perl_run and PL_restartop */	845	/* somebody or something will hit me for both perl_run and PL_restartop */
574	PL_restartop = PL_op;	846	PL_restartop = PL_op;
575	perl_run (PL_curinterp);	847	perl_run (PL_curinterp);
576		848
577	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	849	/*
578	abort ();	850	* If perl-run returns we assume exit() was being called or the coro
		851	* fell off the end, which seems to be the only valid (non-bug)
		852	* reason for perl_run to return. We try to exit by jumping to the
		853	* bootstrap-time "top" top_env, as we cannot restore the "main"
		854	* coroutine as Coro has no such concept
		855	*/
		856	PL_top_env = main_top_env;
		857	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
579	}	858	}
580		859
581	static coro_cctx *	860	static coro_cctx *
582	cctx_new ()	861	cctx_new ()
583	{	862	{
584	coro_cctx *cctx;	863	coro_cctx *cctx;
		864	void *stack_start;
		865	size_t stack_size;
585		866
586	++cctx_count;	867	++cctx_count;
587		868
588	New (0, cctx, 1, coro_cctx);	869	Newz (0, cctx, 1, coro_cctx);
589		870
590	#if HAVE_MMAP	871	#if HAVE_MMAP
591		872
592	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	873	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
593	/* mmap supposedly does allocate-on-write for us */	874	/* 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);	875	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
595		876
596	if (cctx->sptr == (void *)-1)	877	if (cctx->sptr != (void *)-1)
597	{
598	perror ("FATAL: unable to mmap stack for coroutine");
599	_exit (EXIT_FAILURE);
600	}	878	{
601
602	# if STACKGUARD	879	# if CORO_STACKGUARD
603	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	880	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
604	# endif	881	# endif
		882	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		883	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		884	cctx->flags |= CC_MAPPED;
		885	}
		886	else
		887	#endif
		888	{
		889	cctx->ssize = coro_stacksize * (long)sizeof (long);
		890	New (0, cctx->sptr, coro_stacksize, long);
605		891
606	#else
607
608	cctx->ssize = STACKSIZE * (long)sizeof (long);
609	New (0, cctx->sptr, STACKSIZE, long);
610
611	if (!cctx->sptr)	892	if (!cctx->sptr)
612	{	893	{
613	perror ("FATAL: unable to malloc stack for coroutine");	894	perror ("FATAL: unable to allocate stack for coroutine");
614	_exit (EXIT_FAILURE);	895	_exit (EXIT_FAILURE);
615	}	896	}
616		897
617	#endif	898	stack_start = cctx->sptr;
		899	stack_size = cctx->ssize;
		900	}
618		901
619	#if USE_VALGRIND	902	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);	903	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
627		904
628	return cctx;	905	return cctx;
629	}	906	}
630		907
631	static void	908	static void
…		…
634	if (!cctx)	911	if (!cctx)
635	return;	912	return;
636		913
637	--cctx_count;	914	--cctx_count;
638		915
639	#if USE_VALGRIND	916	#if CORO_USE_VALGRIND
640	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	917	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
641	#endif	918	#endif
642		919
643	#if HAVE_MMAP	920	#if HAVE_MMAP
		921	if (cctx->flags & CC_MAPPED)
644	munmap (cctx->sptr, cctx->ssize);	922	munmap (cctx->sptr, cctx->ssize);
645	#else	923	else
		924	#endif
646	Safefree (cctx->sptr);	925	Safefree (cctx->sptr);
647	#endif
648		926
649	Safefree (cctx);	927	Safefree (cctx);
650	}	928	}
651		929
652	static coro_cctx *	930	static coro_cctx *
653	cctx_get ()	931	cctx_get (pTHX)
654	{	932	{
655	coro_cctx *cctx;
656
657	if (cctx_first)	933	while (cctx_first)
658	{	934	{
659	cctx = cctx_first;	935	coro_cctx *cctx = cctx_first;
660	cctx_first = cctx->next;	936	cctx_first = cctx->next;
661	--cctx_idle;	937	--cctx_idle;
662	}	938
663	else	939	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
664	{	940	return cctx;
665	cctx = cctx_new ();	941
666	PL_op = PL_op->op_next;	942	cctx_destroy (cctx);
667	}	943	}
668		944
669	return cctx;	945	return cctx_new ();
670	}	946	}
671		947
672	static void	948	static void
673	cctx_put (coro_cctx *cctx)	949	cctx_put (coro_cctx *cctx)
674	{	950	{
…		…
677	{	953	{
678	coro_cctx *first = cctx_first;	954	coro_cctx *first = cctx_first;
679	cctx_first = first->next;	955	cctx_first = first->next;
680	--cctx_idle;	956	--cctx_idle;
681		957
682	assert (!first->inuse);
683	cctx_destroy (first);	958	cctx_destroy (first);
684	}	959	}
685		960
686	++cctx_idle;	961	++cctx_idle;
687	cctx->next = cctx_first;	962	cctx->next = cctx_first;
688	cctx_first = cctx;	963	cctx_first = cctx;
689	}	964	}
690		965
691	/* never call directly, always through the coro_state_transfer global variable */	966	/** coroutine switching *****************************************************/
		967
692	static void NOINLINE	968	static void NOINLINE
		969	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		970	{
		971	if (prev != next)
		972	{
		973	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		974	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		975
		976	if (next->flags & CF_RUNNING)
		977	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		978
		979	if (next->flags & CF_DESTROYED)
		980	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		981
		982	if (PL_lex_state != LEX_NOTPARSING)
		983	croak ("Coro::State::transfer called while parsing, but this is not supported");
		984	}
		985	}
		986
		987	/* always use the TRANSFER macro */
		988	static void NOINLINE
693	transfer (struct coro *prev, struct coro *next, int flags)	989	transfer (pTHX_ struct coro *prev, struct coro *next)
694	{	990	{
695	dSTACKLEVEL;	991	dSTACKLEVEL;
696		992
697	/* sometimes transfer is only called to set idle_sp */	993	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	994	if (!next)
		995	{
699	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	996	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		997	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		998	}
700	else if (prev != next)	999	else if (prev != next)
701	{	1000	{
702	coro_cctx *prev__cctx;	1001	coro_cctx *prev__cctx;
703		1002
704	if (prev->flags & CF_NEW)	1003	if (prev->flags & CF_NEW)
705	{	1004	{
706	/* create a new empty context */	1005	/* create a new empty context */
707	Newz (0, prev->cctx, 1, coro_cctx);	1006	Newz (0, prev->cctx, 1, coro_cctx);
708	prev->cctx->inuse = 1;
709	prev->flags &= ~CF_NEW;	1007	prev->flags &= ~CF_NEW;
710	prev->flags |= CF_RUNNING;	1008	prev->flags |= CF_RUNNING;
711	}	1009	}
712
713	/*TODO: must not croak here */
714	if (!prev->flags & CF_RUNNING)
715	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
716
717	if (next->flags & CF_RUNNING)
718	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
719		1010
720	prev->flags &= ~CF_RUNNING;	1011	prev->flags &= ~CF_RUNNING;
721	next->flags |= CF_RUNNING;	1012	next->flags |= CF_RUNNING;
722		1013
723	LOCK;	1014	LOCK;
…		…
725	if (next->flags & CF_NEW)	1016	if (next->flags & CF_NEW)
726	{	1017	{
727	/* need to start coroutine */	1018	/* need to start coroutine */
728	next->flags &= ~CF_NEW;	1019	next->flags &= ~CF_NEW;
729	/* first get rid of the old state */	1020	/* first get rid of the old state */
730	SAVE (prev, -1);	1021	save_perl (aTHX_ prev);
731	/* setup coroutine call */	1022	/* setup coroutine call */
732	setup_coro (next);	1023	coro_setup (aTHX_ next);
733	/* need a new stack */
734	assert (!next->stack);
735	}	1024	}
736	else	1025	else
737	{	1026	{
738	/* coroutine already started */	1027	/* coroutine already started */
739	SAVE (prev, flags);	1028	save_perl (aTHX_ prev);
740	LOAD (next);	1029	load_perl (aTHX_ next);
741	}	1030	}
742		1031
743	prev__cctx = prev->cctx;	1032	prev__cctx = prev->cctx;
744		1033
745	/* possibly "free" the cctx */	1034	/* possibly "free" the cctx */
746	if (prev__cctx->idle_sp == STACKLEVEL)	1035	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
747	{	1036	{
748	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1037	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
749	assert (PL_top_env == prev__cctx->top_env);	1038	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
750		1039
751	prev->cctx = 0;	1040	prev->cctx = 0;
752		1041
753	cctx_put (prev__cctx);	1042	cctx_put (prev__cctx);
754	prev__cctx->inuse = 0;
755	}	1043	}
756		1044
		1045	++next->usecount;
		1046
757	if (!next->cctx)	1047	if (!next->cctx)
758	{
759	next->cctx = cctx_get ();	1048	next->cctx = cctx_get (aTHX);
760	assert (!next->cctx->inuse);
761	next->cctx->inuse = 1;
762	}
763		1049
764	if (prev__cctx != next->cctx)	1050	if (prev__cctx != next->cctx)
765	{	1051	{
766	prev__cctx->top_env = PL_top_env;	1052	prev__cctx->top_env = PL_top_env;
767	PL_top_env = next->cctx->top_env;	1053	PL_top_env = next->cctx->top_env;
768	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1054	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
769	}	1055	}
770		1056
771	free_coro_mortal ();	1057	free_coro_mortal (aTHX);
772
773	UNLOCK;	1058	UNLOCK;
774	}	1059	}
775	}	1060	}
776		1061
777	struct transfer_args	1062	struct transfer_args
778	{	1063	{
779	struct coro *prev, *next;	1064	struct coro *prev, *next;
780	int flags;
781	};	1065	};
782		1066
783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1067	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1068	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
784		1069
		1070	/** high level stuff ********************************************************/
		1071
785	static void	1072	static int
786	coro_state_destroy (struct coro *coro)	1073	coro_state_destroy (pTHX_ struct coro *coro)
787	{	1074	{
788	if (coro->refcnt--)	1075	if (coro->flags & CF_DESTROYED)
789	return;	1076	return 0;
		1077
		1078	coro->flags |= CF_DESTROYED;
		1079
		1080	if (coro->flags & CF_READY)
		1081	{
		1082	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1083	/* alternative: look through all ready queues and remove the coro */
		1084	LOCK;
		1085	--coro_nready;
		1086	UNLOCK;
		1087	}
		1088	else
		1089	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		1090
791	if (coro->mainstack && coro->mainstack != main_mainstack)	1091	if (coro->mainstack && coro->mainstack != main_mainstack)
792	{	1092	{
793	struct coro temp;	1093	struct coro temp;
794		1094
795	if (coro->flags & CF_RUNNING)	1095	if (coro->flags & CF_RUNNING)
796	croak ("FATAL: tried to destroy currently running coroutine");	1096	croak ("FATAL: tried to destroy currently running coroutine");
797		1097
798	SAVE ((&temp), TRANSFER_SAVE_ALL);	1098	save_perl (aTHX_ &temp);
799	LOAD (coro);	1099	load_perl (aTHX_ coro);
800		1100
801	coro_destroy_stacks ();	1101	coro_destroy (aTHX_ coro);
802		1102
803	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1103	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
804		1104
805	coro->mainstack = 0;	1105	coro->mainstack = 0;
806	}	1106	}
807		1107
808	cctx_destroy (coro->cctx);	1108	cctx_destroy (coro->cctx);
809	SvREFCNT_dec (coro->args);	1109	SvREFCNT_dec (coro->args);
810	Safefree (coro);	1110
		1111	if (coro->next) coro->next->prev = coro->prev;
		1112	if (coro->prev) coro->prev->next = coro->next;
		1113	if (coro == coro_first) coro_first = coro->next;
		1114
		1115	return 1;
811	}	1116	}
812		1117
813	static int	1118	static int
814	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1119	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
815	{	1120	{
816	struct coro *coro = (struct coro *)mg->mg_ptr;	1121	struct coro *coro = (struct coro *)mg->mg_ptr;
817	mg->mg_ptr = 0;	1122	mg->mg_ptr = 0;
818		1123
		1124	coro->hv = 0;
		1125
		1126	if (--coro->refcnt < 0)
		1127	{
819	coro_state_destroy (coro);	1128	coro_state_destroy (aTHX_ coro);
		1129	Safefree (coro);
		1130	}
820		1131
821	return 0;	1132	return 0;
822	}	1133	}
823		1134
824	static int	1135	static int
…		…
831	return 0;	1142	return 0;
832	}	1143	}
833		1144
834	static MGVTBL coro_state_vtbl = {	1145	static MGVTBL coro_state_vtbl = {
835	0, 0, 0, 0,	1146	0, 0, 0, 0,
836	coro_state_clear,	1147	coro_state_free,
837	0,	1148	0,
838	#ifdef MGf_DUP	1149	#ifdef MGf_DUP
839	coro_state_dup,	1150	coro_state_dup,
840	#else	1151	#else
841	# define MGf_DUP 0	1152	# define MGf_DUP 0
842	#endif	1153	#endif
843	};	1154	};
844		1155
845	static struct coro *
846	SvSTATE (SV *coro)
847	{
848	HV *stash;
849	MAGIC *mg;
850
851	if (SvROK (coro))
852	coro = SvRV (coro);
853
854	stash = SvSTASH (coro);
855	if (stash != coro_stash && stash != coro_state_stash)
856	{
857	/* very slow, but rare, check */
858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859	croak ("Coro::State object required");
860	}
861
862	mg = SvMAGIC (coro);
863	assert (mg->mg_type == PERL_MAGIC_ext);
864	return (struct coro *)mg->mg_ptr;
865	}
866
867	static void	1156	static void
868	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1157	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
869	{	1158	{
870	ta->prev = SvSTATE (prev);	1159	ta->prev = SvSTATE (prev_sv);
871	ta->next = SvSTATE (next);	1160	ta->next = SvSTATE (next_sv);
872	ta->flags = flags;	1161	TRANSFER_CHECK (*ta);
873	}	1162	}
874		1163
875	static void	1164	static void
876	api_transfer (SV *prev, SV *next, int flags)	1165	api_transfer (SV *prev_sv, SV *next_sv)
877	{	1166	{
		1167	dTHX;
878	struct transfer_args ta;	1168	struct transfer_args ta;
879		1169
880	prepare_transfer (&ta, prev, next, flags);	1170	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	1171	TRANSFER (ta);
882	}	1172	}
883		1173
884	/** Coro ********************************************************************/	1174	/** Coro ********************************************************************/
885		1175
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	1176	static void
899	coro_enq (SV *coro_sv)	1177	coro_enq (pTHX_ SV *coro_sv)
900	{	1178	{
901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1179	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
902	coro_nready++;
903	}	1180	}
904		1181
905	static SV *	1182	static SV *
906	coro_deq (int min_prio)	1183	coro_deq (pTHX_ int min_prio)
907	{	1184	{
908	int prio = PRIO_MAX - PRIO_MIN;	1185	int prio = PRIO_MAX - PRIO_MIN;
909		1186
910	min_prio -= PRIO_MIN;	1187	min_prio -= PRIO_MIN;
911	if (min_prio < 0)	1188	if (min_prio < 0)
912	min_prio = 0;	1189	min_prio = 0;
913		1190
914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1191	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
915	if (AvFILLp (coro_ready [prio]) >= 0)	1192	if (AvFILLp (coro_ready [prio]) >= 0)
916	{
917	coro_nready--;
918	return av_shift (coro_ready [prio]);	1193	return av_shift (coro_ready [prio]);
919	}
920		1194
921	return 0;	1195	return 0;
922	}	1196	}
923		1197
924	static int	1198	static int
925	api_ready (SV *coro_sv)	1199	api_ready (SV *coro_sv)
926	{	1200	{
		1201	dTHX;
927	struct coro *coro;	1202	struct coro *coro;
928		1203
929	if (SvROK (coro_sv))	1204	if (SvROK (coro_sv))
930	coro_sv = SvRV (coro_sv);	1205	coro_sv = SvRV (coro_sv);
931		1206
932	coro = SvSTATE (coro_sv);	1207	coro = SvSTATE (coro_sv);
933		1208
934	if (coro->flags & CF_READY)	1209	if (coro->flags & CF_READY)
935	return 0;	1210	return 0;
936		1211
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;	1212	coro->flags |= CF_READY;
943		1213
944	LOCK;	1214	LOCK;
945	coro_enq (SvREFCNT_inc (coro_sv));	1215	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1216	++coro_nready;
946	UNLOCK;	1217	UNLOCK;
947		1218
948	return 1;	1219	return 1;
949	}	1220	}
950		1221
951	static int	1222	static int
952	api_is_ready (SV *coro_sv)	1223	api_is_ready (SV *coro_sv)
953	{	1224	{
		1225	dTHX;
954	return !!SvSTATE (coro_sv)->flags & CF_READY;	1226	return !!(SvSTATE (coro_sv)->flags & CF_READY);
955	}	1227	}
956		1228
957	static void	1229	static void
958	prepare_schedule (struct transfer_args *ta)	1230	prepare_schedule (pTHX_ struct transfer_args *ta)
959	{	1231	{
960	SV *prev, *next;	1232	SV *prev_sv, *next_sv;
961		1233
962	for (;;)	1234	for (;;)
963	{	1235	{
964	LOCK;	1236	LOCK;
965	next = coro_deq (PRIO_MIN);	1237	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1238
		1239	/* nothing to schedule: call the idle handler */
		1240	if (!next_sv)
		1241	{
		1242	dSP;
		1243	UNLOCK;
		1244
		1245	ENTER;
		1246	SAVETMPS;
		1247
		1248	PUSHMARK (SP);
		1249	PUTBACK;
		1250	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1251
		1252	FREETMPS;
		1253	LEAVE;
		1254	continue;
		1255	}
		1256
		1257	ta->next = SvSTATE (next_sv);
		1258
		1259	/* cannot transfer to destroyed coros, skip and look for next */
		1260	if (ta->next->flags & CF_DESTROYED)
		1261	{
		1262	UNLOCK;
		1263	SvREFCNT_dec (next_sv);
		1264	/* coro_nready is already taken care of by destroy */
		1265	continue;
		1266	}
		1267
		1268	--coro_nready;
966	UNLOCK;	1269	UNLOCK;
967
968	if (next)
969	break;	1270	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	}	1271	}
984	}
985
986	prev = SvRV (coro_current);
987	SvRV_set (coro_current, next);
988		1272
989	/* free this only after the transfer */	1273	/* free this only after the transfer */
		1274	prev_sv = SvRV (coro_current);
		1275	ta->prev = SvSTATE (prev_sv);
		1276	TRANSFER_CHECK (*ta);
		1277	assert (ta->next->flags & CF_READY);
		1278	ta->next->flags &= ~CF_READY;
		1279	SvRV_set (coro_current, next_sv);
		1280
990	LOCK;	1281	LOCK;
991	free_coro_mortal ();	1282	free_coro_mortal (aTHX);
		1283	coro_mortal = prev_sv;
992	UNLOCK;	1284	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	}	1285	}
1005		1286
1006	static void	1287	static void
1007	prepare_cede (struct transfer_args *ta)	1288	prepare_cede (pTHX_ struct transfer_args *ta)
1008	{	1289	{
1009	api_ready (coro_current);	1290	api_ready (coro_current);
1010
1011	prepare_schedule (ta);	1291	prepare_schedule (aTHX_ ta);
		1292	}
		1293
		1294	static int
		1295	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1296	{
		1297	if (coro_nready)
		1298	{
		1299	SV *prev = SvRV (coro_current);
		1300	prepare_schedule (aTHX_ ta);
		1301	api_ready (prev);
		1302	return 1;
		1303	}
		1304	else
		1305	return 0;
1012	}	1306	}
1013		1307
1014	static void	1308	static void
1015	api_schedule (void)	1309	api_schedule (void)
1016	{	1310	{
		1311	dTHX;
1017	struct transfer_args ta;	1312	struct transfer_args ta;
1018		1313
1019	prepare_schedule (&ta);	1314	prepare_schedule (aTHX_ &ta);
1020	TRANSFER (ta);	1315	TRANSFER (ta);
1021	}	1316	}
1022		1317
1023	static void	1318	static int
1024	api_cede (void)	1319	api_cede (void)
1025	{	1320	{
		1321	dTHX;
1026	struct transfer_args ta;	1322	struct transfer_args ta;
1027		1323
1028	prepare_cede (&ta);	1324	prepare_cede (aTHX_ &ta);
		1325
		1326	if (ta.prev != ta.next)
		1327	{
1029	TRANSFER (ta);	1328	TRANSFER (ta);
		1329	return 1;
		1330	}
		1331	else
		1332	return 0;
1030	}	1333	}
1031		1334
		1335	static int
		1336	api_cede_notself (void)
		1337	{
		1338	dTHX;
		1339	struct transfer_args ta;
		1340
		1341	if (prepare_cede_notself (aTHX_ &ta))
		1342	{
		1343	TRANSFER (ta);
		1344	return 1;
		1345	}
		1346	else
		1347	return 0;
		1348	}
		1349
		1350	static void
		1351	api_trace (SV *coro_sv, int flags)
		1352	{
		1353	dTHX;
		1354	struct coro *coro = SvSTATE (coro_sv);
		1355
		1356	if (flags & CC_TRACE)
		1357	{
		1358	if (!coro->cctx)
		1359	coro->cctx = cctx_new ();
		1360	else if (!(coro->cctx->flags & CC_TRACE))
		1361	croak ("cannot enable tracing on coroutine with custom stack");
		1362
		1363	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1364	}
		1365	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1366	{
		1367	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1368
		1369	if (coro->flags & CF_RUNNING)
		1370	PL_runops = RUNOPS_DEFAULT;
		1371	else
		1372	coro->runops = RUNOPS_DEFAULT;
		1373	}
		1374	}
		1375
1032	MODULE = Coro::State PACKAGE = Coro::State	1376	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1033		1377
1034	PROTOTYPES: DISABLE	1378	PROTOTYPES: DISABLE
1035		1379
1036	BOOT:	1380	BOOT:
1037	{	1381	{
1038	#ifdef USE_ITHREADS	1382	#ifdef USE_ITHREADS
1039	MUTEX_INIT (&coro_mutex);	1383	MUTEX_INIT (&coro_mutex);
1040	#endif	1384	#endif
1041	BOOT_PAGESIZE;	1385	BOOT_PAGESIZE;
1042		1386
		1387	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1388
1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1389	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1044		1390
1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1394	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1048		1395
1049	main_mainstack = PL_mainstack;	1396	main_mainstack = PL_mainstack;
		1397	main_top_env = PL_top_env;
		1398
		1399	while (main_top_env->je_prev)
		1400	main_top_env = main_top_env->je_prev;
1050		1401
1051	coroapi.ver = CORO_API_VERSION;	1402	coroapi.ver = CORO_API_VERSION;
1052	coroapi.transfer = api_transfer;	1403	coroapi.transfer = api_transfer;
1053		1404
1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1405	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1061	struct coro *coro;	1412	struct coro *coro;
1062	HV *hv;	1413	HV *hv;
1063	int i;	1414	int i;
1064		1415
1065	Newz (0, coro, 1, struct coro);	1416	Newz (0, coro, 1, struct coro);
1066	coro->args = newAV ();	1417	coro->args = newAV ();
1067	coro->flags = CF_NEW;	1418	coro->flags = CF_NEW;
1068		1419
		1420	if (coro_first) coro_first->prev = coro;
		1421	coro->next = coro_first;
		1422	coro_first = coro;
		1423
1069	hv = newHV ();	1424	coro->hv = hv = newHV ();
1070	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1425	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));	1426	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1072		1427
1073	for (i = 1; i < items; i++)	1428	for (i = 1; i < items; i++)
1074	av_push (coro->args, newSVsv (ST (i)));	1429	av_push (coro->args, newSVsv (ST (i)));
1075	}	1430	}
1076	OUTPUT:	1431	OUTPUT:
1077	RETVAL	1432	RETVAL
1078		1433
		1434	# these not obviously related functions are all rolled into the same xs
		1435	# function to increase chances that they all will call transfer with the same
		1436	# stack offset
1079	void	1437	void
1080	_set_stacklevel (...)	1438	_set_stacklevel (...)
1081	ALIAS:	1439	ALIAS:
1082	Coro::State::transfer = 1	1440	Coro::State::transfer = 1
1083	Coro::schedule = 2	1441	Coro::schedule = 2
1084	Coro::cede = 3	1442	Coro::cede = 3
		1443	Coro::cede_notself = 4
1085	CODE:	1444	CODE:
1086	{	1445	{
1087	struct transfer_args ta;	1446	struct transfer_args ta;
1088		1447
1089	switch (ix)	1448	switch (ix)
1090	{	1449	{
1091	case 0:	1450	case 0:
1092	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1451	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1093	ta.next = 0;	1452	ta.next = 0;
1094	ta.flags = TRANSFER_SET_STACKLEVEL;
1095	break;	1453	break;
1096		1454
1097	case 1:	1455	case 1:
1098	if (items != 3)	1456	if (items != 2)
1099	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1457	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1100		1458
1101	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1459	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1102	break;	1460	break;
1103		1461
1104	case 2:	1462	case 2:
1105	prepare_schedule (&ta);	1463	prepare_schedule (aTHX_ &ta);
1106	break;	1464	break;
1107		1465
1108	case 3:	1466	case 3:
1109	prepare_cede (&ta);	1467	prepare_cede (aTHX_ &ta);
		1468	break;
		1469
		1470	case 4:
		1471	if (!prepare_cede_notself (aTHX_ &ta))
		1472	XSRETURN_EMPTY;
		1473
1110	break;	1474	break;
1111	}	1475	}
1112		1476
		1477	BARRIER;
1113	TRANSFER (ta);	1478	TRANSFER (ta);
1114	}
1115		1479
1116	void	1480	if (GIMME_V != G_VOID && ta.next != ta.prev)
1117	_clone_state_from (SV *dst, SV *src)	1481	XSRETURN_YES;
		1482	}
		1483
		1484	bool
		1485	_destroy (SV *coro_sv)
1118	CODE:	1486	CODE:
1119	{	1487	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1120	struct coro *coro_src = SvSTATE (src);	1488	OUTPUT:
1121		1489	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		1490
1128	void	1491	void
1129	_exit (code)	1492	_exit (code)
1130	int code	1493	int code
1131	PROTOTYPE: $	1494	PROTOTYPE: $
1132	CODE:	1495	CODE:
1133	_exit (code);	1496	_exit (code);
1134		1497
1135	int	1498	int
		1499	cctx_stacksize (int new_stacksize = 0)
		1500	CODE:
		1501	RETVAL = coro_stacksize;
		1502	if (new_stacksize)
		1503	coro_stacksize = new_stacksize;
		1504	OUTPUT:
		1505	RETVAL
		1506
		1507	int
1136	cctx_count ()	1508	cctx_count ()
1137	CODE:	1509	CODE:
1138	RETVAL = cctx_count;	1510	RETVAL = cctx_count;
1139	OUTPUT:	1511	OUTPUT:
1140	RETVAL	1512	RETVAL
…		…
1144	CODE:	1516	CODE:
1145	RETVAL = cctx_idle;	1517	RETVAL = cctx_idle;
1146	OUTPUT:	1518	OUTPUT:
1147	RETVAL	1519	RETVAL
1148		1520
		1521	void
		1522	list ()
		1523	PPCODE:
		1524	{
		1525	struct coro *coro;
		1526	for (coro = coro_first; coro; coro = coro->next)
		1527	if (coro->hv)
		1528	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1529	}
		1530
		1531	void
		1532	call (Coro::State coro, SV *coderef)
		1533	ALIAS:
		1534	eval = 1
		1535	CODE:
		1536	{
		1537	if (coro->mainstack)
		1538	{
		1539	struct coro temp;
		1540	Zero (&temp, 1, struct coro);
		1541
		1542	if (!(coro->flags & CF_RUNNING))
		1543	{
		1544	save_perl (aTHX_ &temp);
		1545	load_perl (aTHX_ coro);
		1546	}
		1547
		1548	{
		1549	dSP;
		1550	ENTER;
		1551	SAVETMPS;
		1552	PUSHMARK (SP);
		1553	PUTBACK;
		1554	if (ix)
		1555	eval_sv (coderef, 0);
		1556	else
		1557	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1558	SPAGAIN;
		1559	FREETMPS;
		1560	LEAVE;
		1561	PUTBACK;
		1562	}
		1563
		1564	if (!(coro->flags & CF_RUNNING))
		1565	{
		1566	save_perl (aTHX_ coro);
		1567	load_perl (aTHX_ &temp);
		1568	}
		1569	}
		1570	}
		1571
		1572	SV *
		1573	is_ready (Coro::State coro)
		1574	PROTOTYPE: $
		1575	ALIAS:
		1576	is_ready = CF_READY
		1577	is_running = CF_RUNNING
		1578	is_new = CF_NEW
		1579	is_destroyed = CF_DESTROYED
		1580	CODE:
		1581	RETVAL = boolSV (coro->flags & ix);
		1582	OUTPUT:
		1583	RETVAL
		1584
		1585	void
		1586	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1587
		1588	SV *
		1589	has_stack (Coro::State coro)
		1590	PROTOTYPE: $
		1591	CODE:
		1592	RETVAL = boolSV (!!coro->cctx);
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	int
		1597	is_traced (Coro::State coro)
		1598	PROTOTYPE: $
		1599	CODE:
		1600	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1601	OUTPUT:
		1602	RETVAL
		1603
		1604	IV
		1605	rss (Coro::State coro)
		1606	PROTOTYPE: $
		1607	ALIAS:
		1608	usecount = 1
		1609	CODE:
		1610	switch (ix)
		1611	{
		1612	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1613	case 1: RETVAL = coro->usecount; break;
		1614	}
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618
1149	MODULE = Coro::State PACKAGE = Coro	1619	MODULE = Coro::State PACKAGE = Coro
1150		1620
1151	BOOT:	1621	BOOT:
1152	{	1622	{
1153	int i;	1623	int i;
		1624
		1625	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1626	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1627	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1628
		1629	coro_current = get_sv ("Coro::current", FALSE);
		1630	SvREADONLY_on (coro_current);
1154		1631
1155	coro_stash = gv_stashpv ("Coro", TRUE);	1632	coro_stash = gv_stashpv ("Coro", TRUE);
1156		1633
1157	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1634	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1158	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1635	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1159	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1636	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1160	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1637	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1161	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1638	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1162	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1639	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1163		1640
1164	coro_current = get_sv ("Coro::current", FALSE);
1165	SvREADONLY_on (coro_current);
1166
1167	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1641	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1168	coro_ready[i] = newAV ();	1642	coro_ready[i] = newAV ();
1169		1643
1170	{	1644	{
1171	SV *sv = perl_get_sv("Coro::API", 1);	1645	SV *sv = perl_get_sv("Coro::API", 1);
1172		1646
1173	coroapi.schedule = api_schedule;	1647	coroapi.schedule = api_schedule;
1174	coroapi.cede = api_cede;	1648	coroapi.cede = api_cede;
		1649	coroapi.cede_notself = api_cede_notself;
1175	coroapi.ready = api_ready;	1650	coroapi.ready = api_ready;
1176	coroapi.is_ready = api_is_ready;	1651	coroapi.is_ready = api_is_ready;
1177	coroapi.nready = &coro_nready;	1652	coroapi.nready = &coro_nready;
1178	coroapi.current = coro_current;	1653	coroapi.current = coro_current;
1179		1654
1180	GCoroAPI = &coroapi;	1655	GCoroAPI = &coroapi;
1181	sv_setiv (sv, (IV)&coroapi);	1656	sv_setiv (sv, (IV)&coroapi);
1182	SvREADONLY_on (sv);	1657	SvREADONLY_on (sv);
1183	}	1658	}
1184	}	1659	}
		1660
		1661	void
		1662	_set_current (SV *current)
		1663	PROTOTYPE: $
		1664	CODE:
		1665	SvREFCNT_dec (SvRV (coro_current));
		1666	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1185		1667
1186	int	1668	int
1187	prio (Coro::State coro, int newprio = 0)	1669	prio (Coro::State coro, int newprio = 0)
1188	ALIAS:	1670	ALIAS:
1189	nice = 1	1671	nice = 1
…		…
1192	RETVAL = coro->prio;	1674	RETVAL = coro->prio;
1193		1675
1194	if (items > 1)	1676	if (items > 1)
1195	{	1677	{
1196	if (ix)	1678	if (ix)
1197	newprio += coro->prio;	1679	newprio = coro->prio - newprio;
1198		1680
1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1681	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1682	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1201		1683
1202	coro->prio = newprio;	1684	coro->prio = newprio;
1203	}	1685	}
1204	}	1686	}
		1687	OUTPUT:
		1688	RETVAL
1205		1689
1206	SV *	1690	SV *
1207	ready (SV *self)	1691	ready (SV *self)
1208	PROTOTYPE: $	1692	PROTOTYPE: $
1209	CODE:	1693	CODE:
1210	RETVAL = boolSV (api_ready (self));	1694	RETVAL = boolSV (api_ready (self));
1211	OUTPUT:	1695	OUTPUT:
1212	RETVAL	1696	RETVAL
1213		1697
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	1698	int
1223	nready (...)	1699	nready (...)
1224	PROTOTYPE:	1700	PROTOTYPE:
1225	CODE:	1701	CODE:
1226	RETVAL = coro_nready;	1702	RETVAL = coro_nready;
1227	OUTPUT:	1703	OUTPUT:
1228	RETVAL	1704	RETVAL
1229		1705
		1706	# for async_pool speedup
1230	void	1707	void
1231	_set_current (SV *current)	1708	_pool_1 (SV *cb)
1232	PROTOTYPE: $
1233	CODE:	1709	CODE:
1234	SvREFCNT_dec (SvRV (coro_current));	1710	{
1235	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1711	int i, len;
		1712	HV *hv = (HV *)SvRV (coro_current);
		1713	AV *defav = GvAV (PL_defgv);
		1714	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1715	AV *invoke_av;
		1716
		1717	if (!invoke)
		1718	croak ("\3terminate\2\n");
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
		1730	av_fill (defav, len - 1);
		1731	for (i = 0; i < len; ++i)
		1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
		1734
		1735	SvREFCNT_dec (invoke);
		1736	}
		1737
		1738	void
		1739	_pool_2 (SV *cb)
		1740	CODE:
		1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
		1743
		1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1747	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1748	croak ("\3terminate\2\n");
		1749
		1750	av_clear (GvAV (PL_defgv));
		1751	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1752	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1753
		1754	coro->prio = 0;
		1755
		1756	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1757	api_trace (coro_current, 0);
		1758
		1759	av_push (av_async_pool, newSVsv (coro_current));
		1760	}
		1761
1236		1762
1237	MODULE = Coro::State PACKAGE = Coro::AIO	1763	MODULE = Coro::State PACKAGE = Coro::AIO
1238		1764
1239	SV *	1765	SV *
1240	_get_state ()	1766	_get_state ()

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