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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.118 by root, Fri Dec 1 19:58:53 2006 UTC vs.
Revision 1.172 by root, Sun Sep 30 13:15:01 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 */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
106	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
107	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;
108	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
109	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
110		136
		137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
111	static struct coro_cctx *cctx_first;	142	static struct coro_cctx *cctx_first;
112	static int cctx_count, cctx_idle;	143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
113		153
114	/* this is a structure representing a c-level coroutine */	154	/* this is a structure representing a c-level coroutine */
115	typedef struct coro_cctx {	155	typedef struct coro_cctx {
116	struct coro_cctx *next;	156	struct coro_cctx *next;
117		157
118	/* the stack */	158	/* the stack */
119	void *sptr;	159	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	160	size_t ssize;
121		161
122	/* cpu state */	162	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	165	JMPENV *top_env;
125	coro_context cctx;	166	coro_context cctx;
126		167
127	int inuse;
128
129	#if USE_VALGRIND	168	#if CORO_USE_VALGRIND
130	int valgrind_id;	169	int valgrind_id;
131	#endif	170	#endif
		171	unsigned char flags;
132	} coro_cctx;	172	} coro_cctx;
133		173
134	enum {	174	enum {
135	CF_RUNNING = 0x0001, /* coroutine is running */	175	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY = 0x0002, /* coroutine is ready */	176	CF_READY = 0x0002, /* coroutine is ready */
137	CF_NEW = 0x0004, /* ahs never been switched to */	177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138	};	179	};
139		180
140	/* this is a structure representing a perl-level coroutine */	181	/* this is a structure representing a perl-level coroutine */
141	struct coro {	182	struct coro {
142	/* the c coroutine allocated to this perl coroutine, if any */	183	/* the c coroutine allocated to this perl coroutine, if any */
143	coro_cctx *cctx;	184	coro_cctx *cctx;
144		185
145	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
146	AV *args;	187	AV *args;
147	int refcnt;	188	int refcnt;
148	int flags;	189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
149		191
150	/* optionally saved, might be zero */	192	/* optionally saved, might be zero */
151	AV *defav;	193	AV *defav; /* @_ */
152	SV *defsv;	194	SV *defsv; /* $_ */
153	SV *errsv;	195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
154		199
155	#define VAR(name,type) type name;	200	#define VAR(name,type) type name;
156	# include "state.h"	201	# include "state.h"
157	#undef VAR	202	#undef VAR
158		203
		204	/* statistics */
		205	int usecount; /* number of switches to this coro */
		206
159	/* coro process data */	207	/* coro process data */
160	int prio;	208	int prio;
		209
		210	/* linked list */
		211	struct coro *next, *prev;
		212	HV *hv; /* the perl hash associated with this coro, if any */
161	};	213	};
162		214
163	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
165		217
		218	/** Coro ********************************************************************/
		219
		220	#define PRIO_MAX 3
		221	#define PRIO_HIGH 1
		222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/** lowlevel stuff **********************************************************/
		234
166	static AV *	235	static AV *
167	coro_clone_padlist (CV *cv)	236	coro_clone_padlist (pTHX_ CV *cv)
168	{	237	{
169	AV *padlist = CvPADLIST (cv);	238	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	239	AV *newpadlist, *newpad;
171		240
172	newpadlist = newAV ();	241	newpadlist = newAV ();
…		…
184		253
185	return newpadlist;	254	return newpadlist;
186	}	255	}
187		256
188	static void	257	static void
189	free_padlist (AV *padlist)	258	free_padlist (pTHX_ AV *padlist)
190	{	259	{
191	/* may be during global destruction */	260	/* may be during global destruction */
192	if (SvREFCNT (padlist))	261	if (SvREFCNT (padlist))
193	{	262	{
194	I32 i = AvFILLp (padlist);	263	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	284	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	285	AV *av = (AV *)mg->mg_obj;
217		286
218	/* casting is fun. */	287	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	288	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	289	free_padlist (aTHX_ padlist);
221		290
222	SvREFCNT_dec (av);	291	SvREFCNT_dec (av);
223		292
224	return 0;	293	return 0;
225	}	294	}
…		…
233	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234	? SvMAGIC (cv) \	303	? SvMAGIC (cv) \
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
236	: 0	305	: 0
237		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		332
238	/* the next two functions merely cache the padlists */	333	/* the next two functions merely cache the padlists */
239	static void	334	static void
240	get_padlist (CV *cv)	335	get_padlist (pTHX_ CV *cv)
241	{	336	{
242	MAGIC *mg = CORO_MAGIC (cv);	337	MAGIC *mg = CORO_MAGIC (cv);
243	AV *av;	338	AV *av;
244		339
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	342	else
248	{	343	{
249	#if 0	344	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	345	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	346	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	347	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	348	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	349	SvREFCNT_dec (cp);
255	#else	350	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	352	#endif
258	}	353	}
259	}	354	}
260		355
261	static void	356	static void
262	put_padlist (CV *cv)	357	put_padlist (pTHX_ CV *cv)
263	{	358	{
264	MAGIC *mg = CORO_MAGIC (cv);	359	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	360	AV *av;
266		361
267	if (!mg)	362	if (!mg)
…		…
278	av_extend (av, AvMAX (av) + 1);	373	av_extend (av, AvMAX (av) + 1);
279		374
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	376	}
282		377
		378	/** load & save, init *******************************************************/
		379
283	#define SB do {	380	#define SB do {
284	#define SE } while (0)	381	#define SE } while (0)
285		382
286	#define LOAD(state) load_state ((state))
287	#define SAVE(state,flags) save_state ((state),(flags))
288
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE	383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290		384
291	static void	385	static void
292	load_state (Coro__State c)	386	load_perl (pTHX_ Coro__State c)
293	{	387	{
294	#define VAR(name,type) PL_ ## name = c->name;	388	#define VAR(name,type) PL_ ## name = c->name;
295	# include "state.h"	389	# include "state.h"
296	#undef VAR	390	#undef VAR
297		391
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		400	{
		401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
		403	}
		404	else
		405	{
		406	REPLACE_SV (PL_rs, c->irssv);
		407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		408	sv_setsv (c->irssv_sv, PL_rs);
		409	}
		410	}
301		411
302	{	412	{
303	dSP;	413	dSP;
304	CV *cv;	414	CV *cv;
305		415
306	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
308	{	418	{
309	put_padlist (cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	420	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	421	CvPADLIST (cv) = (AV *)POPs;
312	}	422	}
313		423
314	PUTBACK;	424	PUTBACK;
315	}	425	}
316	}	426	}
317		427
318	static void	428	static void
319	save_state (Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
320	{	430	{
321	{	431	{
322	dSP;	432	dSP;
323	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
327	/*	437	/*
328	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
329	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
330	*/	440	*/
331		441
332	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
334	for (;;)	444	for (;;)
335	{	445	{
336	while (cxix >= 0)	446	while (cxix >= 0)
337	{	447	{
338	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
339		449
340	if (CxTYPE (cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
341	{	451	{
342	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
343		453
344	if (CvDEPTH (cv))	454	if (CvDEPTH (cv))
345	{	455	{
346	EXTEND (SP, 3);	456	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	457	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
351		460
352	CvDEPTH (cv) = 0;	461	CvDEPTH (cv) = 0;
353	get_padlist (cv);	462	get_padlist (aTHX_ cv);
354	}	463	}
355	}	464	}
356	#ifdef CXt_FORMAT
357	else if (CxTYPE (cx) == CXt_FORMAT)
358	{
359	/* I never used formats, so how should I know how these are implemented? */
360	/* my bold guess is as a simple, plain sub... */
361	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362	}
363	#endif
364	}	465	}
365		466
366	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
367	break;	468	break;
368		469
369	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
370	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
371	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
372	}	473	}
373		474
374	PUTBACK;	475	PUTBACK;
375	}	476	}
376		477
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
380		483
381	#define VAR(name,type)c->name = PL_ ## name;	484	#define VAR(name,type)c->name = PL_ ## name;
382	# include "state.h"	485	# include "state.h"
383	#undef VAR	486	#undef VAR
384	}	487	}
…		…
387	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	492	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	493	* not usually need a lot of stackspace.
391	*/	494	*/
		495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
392	static void	498	static void
393	coro_init_stacks ()	499	coro_init_stacks (pTHX)
394	{	500	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	501	PL_curstackinfo = new_stackinfo(64, 6);
396	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399		505
400	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
401	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403		509
404	New(50,PL_tmps_stack,128,SV*);	510	New(50,PL_tmps_stack,64,SV*);
405	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
406	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
407	PL_tmps_max = 128;	513	PL_tmps_max = 64;
408		514
409	New(54,PL_markstack,32,I32);	515	New(54,PL_markstack,16,I32);
410	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
411	PL_markstack_max = PL_markstack + 32;	517	PL_markstack_max = PL_markstack + 16;
412		518
413	#ifdef SET_MARK_OFFSET	519	#ifdef SET_MARK_OFFSET
414	SET_MARK_OFFSET;	520	SET_MARK_OFFSET;
415	#endif	521	#endif
416		522
417	New(54,PL_scopestack,32,I32);	523	New(54,PL_scopestack,16,I32);
418	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
419	PL_scopestack_max = 32;	525	PL_scopestack_max = 16;
420		526
421	New(54,PL_savestack,64,ANY);	527	New(54,PL_savestack,64,ANY);
422	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
423	PL_savestack_max = 64;	529	PL_savestack_max = 64;
424		530
425	#if !PERL_VERSION_ATLEAST (5,9,0)	531	#if !PERL_VERSION_ATLEAST (5,9,0)
426	New(54,PL_retstack,16,OP*);	532	New(54,PL_retstack,4,OP*);
427	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	534	PL_retstack_max = 4;
429	#endif	535	#endif
430	}	536	}
		537	#endif
431		538
432	/*	539	/*
433	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
434	*/	541	*/
435	static void	542	static void
436	coro_destroy_stacks ()	543	coro_destroy_stacks (pTHX)
437	{	544	{
438	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
439	{	546	{
440	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
441	LEAVE_SCOPE (0);	548	LEAVE_SCOPE (0);
		549	assert (PL_tmps_floor == -1);
442		550
443	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
444	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
445		554
		555	/* unwind all extra stacks */
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
447	}	560	}
448		561
449	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
451		564
452	while (PL_curstackinfo)	565	while (PL_curstackinfo)
453	{	566	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
455		568
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		571
468	Safefree (PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	573	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	574	PL_curstackinfo = p;
471	}	575	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	581	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	582	Safefree (PL_retstack);
479	#endif	583	#endif
480	}	584	}
481		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/** coroutine stack handling ************************************************/
		618
482	static void	619	static void
483	setup_coro (struct coro *coro)	620	setup_coro (pTHX_ struct coro *coro)
484	{	621	{
485	/*	622	/*
486	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
487	*/	624	*/
488
489	coro_init_stacks ();	625	coro_init_stacks (aTHX);
490		626
		627	PL_runops = RUNOPS_DEFAULT;
491	PL_curcop = &PL_compiling;	628	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	629	PL_in_eval = EVAL_NULL;
		630	PL_comppad = 0;
493	PL_curpm = 0;	631	PL_curpm = 0;
494	PL_localizing = 0;	632	PL_localizing = 0;
495	PL_dirty = 0;	633	PL_dirty = 0;
496	PL_restartop = 0;	634	PL_restartop = 0;
497		635
498	{	636	{
499	dSP;	637	dSP;
500	LOGOP myop;	638	LOGOP myop;
501		639
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));	640	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;	641	GvAV (PL_defgv) = coro->args; coro->args = 0;
507		642
508	Zero (&myop, 1, LOGOP);	643	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	644	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	645	myop.op_flags = OPf_WANT_VOID;
511		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
512	PL_op = (OP *)&myop;	650	PL_op = (OP *)&myop;
513
514	PUSHMARK (SP);
515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516	PUTBACK;
517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	652	SPAGAIN;
519	}	653	}
520		654
521	ENTER; /* necessary e.g. for dounwind */	655	ENTER; /* necessary e.g. for dounwind */
522	}	656	}
523		657
524	static void	658	static void
525	free_coro_mortal ()	659	free_coro_mortal (pTHX)
526	{	660	{
527	if (coro_mortal)	661	if (coro_mortal)
528	{	662	{
529	SvREFCNT_dec (coro_mortal);	663	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	664	coro_mortal = 0;
531	}	665	}
532	}	666	}
533		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		681	{
		682	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		683	SV **bot, **top;
		684	AV *av = newAV (); /* return values */
		685	SV **cb;
		686	runops_proc_t old_runops = PL_runops;
		687	dSP;
		688	ENTER;
		689	SAVETMPS;
		690	EXTEND (SP, 3);
		691	PL_runops = RUNOPS_DEFAULT;
		692
		693	GV *gv = CvGV (cx->blk_sub.cv);
		694	SV *fullname = sv_2mortal (newSV (0));
		695	if (isGV (gv))
		696	gv_efullname3 (fullname, gv, 0);
		697
		698	bot = PL_stack_base + cx->blk_oldsp + 1;
		699	top = cx->blk_gimme == G_ARRAY ? SP + 1
		700	: cx->blk_gimme == G_SCALAR ? bot + 1
		701	: bot;
		702
		703	while (bot < top)
		704	av_push (av, SvREFCNT_inc (*bot++));
		705
		706	PUSHMARK (SP);
		707	PUSHs (&PL_sv_no);
		708	PUSHs (fullname);
		709	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		710	PUTBACK;
		711	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		712	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		713	SPAGAIN;
		714
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = old_runops;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727	runops_proc_t old_runops = PL_runops;
		728	dSP;
		729	ENTER;
		730	SAVETMPS;
		731	EXTEND (SP, 3);
		732	PL_runops = RUNOPS_DEFAULT;
		733
		734	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		735	{
		736	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		737
		738	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		739	{
		740	GV *gv = CvGV (cx->blk_sub.cv);
		741	SV *fullname = sv_2mortal (newSV (0));
		742	if (isGV (gv))
		743	gv_efullname3 (fullname, gv, 0);
		744
		745	PUSHMARK (SP);
		746	PUSHs (&PL_sv_yes);
		747	PUSHs (fullname);
		748	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		749	PUTBACK;
		750	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		751	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		752	SPAGAIN;
		753	}
		754
		755	oldcxix = cxstack_ix;
		756	}
		757
		758	if (cctx->flags & CC_TRACE_LINE)
		759	{
		760	PUSHMARK (SP);
		761	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		762	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		763	PUTBACK;
		764	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		765	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		766	SPAGAIN;
		767	}
		768
		769	FREETMPS;
		770	LEAVE;
		771	PL_runops = old_runops;
		772	}
		773	}
		774	}
		775
		776	TAINT_NOT;
		777	return 0;
		778	}
		779
		780	/* inject a fake call to Coro::State::_cctx_init into the execution */
		781	/* _cctx_init should be careful, as it could be called at almost any time */
		782	/* during execution of a perl program */
534	static void NOINLINE	783	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	784	prepare_cctx (pTHX_ coro_cctx *cctx)
536	{	785	{
537	dSP;	786	dSP;
538	LOGOP myop;	787	LOGOP myop;
539		788
		789	PL_top_env = &PL_start_env;
		790
		791	if (cctx->flags & CC_TRACE)
		792	PL_runops = runops_trace;
		793
540	Zero (&myop, 1, LOGOP);	794	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	795	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	796	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		797
546	PUSHMARK (SP);	798	PUSHMARK (SP);
		799	EXTEND (SP, 2);
		800	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	801	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	802	PUTBACK;
		803	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	804	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	805	SPAGAIN;
551	}	806	}
552		807
		808	/*
		809	* this is a _very_ stripped down perl interpreter ;)
		810	*/
553	static void	811	static void
554	coro_run (void *arg)	812	coro_run (void *arg)
555	{	813	{
		814	dTHX;
		815
556	/* coro_run is the alternative epilogue of transfer() */	816	/* coro_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	817	UNLOCK;
558		818
		819	/* we now skip the entersub that lead to transfer() */
		820	PL_op = PL_op->op_next;
		821
		822	/* inject a fake subroutine call to cctx_init */
		823	prepare_cctx (aTHX_ (coro_cctx *)arg);
		824
		825	/* somebody or something will hit me for both perl_run and PL_restartop */
		826	PL_restartop = PL_op;
		827	perl_run (PL_curinterp);
		828
559	/*	829	/*
560	* this is a _very_ stripped down perl interpreter ;)	830	* If perl-run returns we assume exit() was being called or the coro
		831	* fell off the end, which seems to be the only valid (non-bug)
		832	* reason for perl_run to return. We try to exit by jumping to the
		833	* bootstrap-time "top" top_env, as we cannot restore the "main"
		834	* coroutine as Coro has no such concept
561	*/	835	*/
562	PL_top_env = &PL_start_env;	836	PL_top_env = main_top_env;
563		837	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
564	/* inject call to cctx_init */
565	prepare_cctx ((coro_cctx *)arg);
566
567	/* somebody will hit me for both perl_run and PL_restartop */
568	perl_run (PL_curinterp);
569
570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571	abort ();
572	}	838	}
573		839
574	static coro_cctx *	840	static coro_cctx *
575	cctx_new ()	841	cctx_new ()
576	{	842	{
577	coro_cctx *cctx;	843	coro_cctx *cctx;
		844	void *stack_start;
		845	size_t stack_size;
578		846
579	++cctx_count;	847	++cctx_count;
580		848
581	New (0, cctx, 1, coro_cctx);	849	Newz (0, cctx, 1, coro_cctx);
582		850
583	#if HAVE_MMAP	851	#if HAVE_MMAP
584		852
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	853	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	854	/* mmap supposedly does allocate-on-write for us */
587	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	855	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		856
589	if (cctx->sptr == (void *)-1)	857	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	858	{
594
595	# if STACKGUARD	859	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	860	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	861	# endif
		862	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		863	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		864	cctx->flags |= CC_MAPPED;
		865	}
		866	else
		867	#endif
		868	{
		869	cctx->ssize = coro_stacksize * (long)sizeof (long);
		870	New (0, cctx->sptr, coro_stacksize, long);
598		871
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	872	if (!cctx->sptr)
605	{	873	{
606	perror ("FATAL: unable to malloc stack for coroutine");	874	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	875	_exit (EXIT_FAILURE);
608	}	876	}
609		877
610	#endif	878	stack_start = cctx->sptr;
		879	stack_size = cctx->ssize;
		880	}
611		881
612	#if USE_VALGRIND	882	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
613	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615	cctx->ssize + (char *)cctx->sptr
616	);
617	#endif
618
619	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	883	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
620		884
621	return cctx;	885	return cctx;
622	}	886	}
623		887
624	static void	888	static void
…		…
627	if (!cctx)	891	if (!cctx)
628	return;	892	return;
629		893
630	--cctx_count;	894	--cctx_count;
631		895
632	#if USE_VALGRIND	896	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	897	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	898	#endif
635		899
636	#if HAVE_MMAP	900	#if HAVE_MMAP
		901	if (cctx->flags & CC_MAPPED)
637	munmap (cctx->sptr, cctx->ssize);	902	munmap (cctx->sptr, cctx->ssize);
638	#else	903	else
		904	#endif
639	Safefree (cctx->sptr);	905	Safefree (cctx->sptr);
640	#endif
641		906
642	Safefree (cctx);	907	Safefree (cctx);
643	}	908	}
644		909
645	static coro_cctx *	910	static coro_cctx *
646	cctx_get ()	911	cctx_get (pTHX)
647	{	912	{
648	coro_cctx *cctx;
649
650	if (cctx_first)	913	while (cctx_first)
651	{	914	{
652	cctx = cctx_first;	915	coro_cctx *cctx = cctx_first;
653	cctx_first = cctx->next;	916	cctx_first = cctx->next;
654	--cctx_idle;	917	--cctx_idle;
655	}	918
656	else	919	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
657	{	920	return cctx;
658	cctx = cctx_new ();	921
659	PL_op = PL_op->op_next;	922	cctx_destroy (cctx);
660	}	923	}
661		924
662	return cctx;	925	return cctx_new ();
663	}	926	}
664		927
665	static void	928	static void
666	cctx_put (coro_cctx *cctx)	929	cctx_put (coro_cctx *cctx)
667	{	930	{
…		…
670	{	933	{
671	coro_cctx *first = cctx_first;	934	coro_cctx *first = cctx_first;
672	cctx_first = first->next;	935	cctx_first = first->next;
673	--cctx_idle;	936	--cctx_idle;
674		937
675	assert (!first->inuse);
676	cctx_destroy (first);	938	cctx_destroy (first);
677	}	939	}
678		940
679	++cctx_idle;	941	++cctx_idle;
680	cctx->next = cctx_first;	942	cctx->next = cctx_first;
681	cctx_first = cctx;	943	cctx_first = cctx;
682	}	944	}
683		945
684	/* never call directly, always through the coro_state_transfer global variable */	946	/** coroutine switching *****************************************************/
		947
685	static void NOINLINE	948	static void NOINLINE
		949	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		950	{
		951	if (prev != next)
		952	{
		953	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		954	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		955
		956	if (next->flags & CF_RUNNING)
		957	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		958
		959	if (next->flags & CF_DESTROYED)
		960	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		961
		962	if (PL_lex_state != LEX_NOTPARSING)
		963	croak ("Coro::State::transfer called while parsing, but this is not supported");
		964	}
		965	}
		966
		967	/* always use the TRANSFER macro */
		968	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	969	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	970	{
688	dSTACKLEVEL;	971	dSTACKLEVEL;
689		972
690	/* sometimes transfer is only called to set idle_sp */	973	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	974	if (!next)
		975	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	976	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		977	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		978	}
693	else if (prev != next)	979	else if (prev != next)
694	{	980	{
695	coro_cctx *prev__cctx;	981	coro_cctx *prev__cctx;
696		982
697	if (prev->flags & CF_NEW)	983	if (prev->flags & CF_NEW)
698	{	984	{
699	/* create a new empty context */	985	/* create a new empty context */
700	Newz (0, prev->cctx, 1, coro_cctx);	986	Newz (0, prev->cctx, 1, coro_cctx);
701	prev->cctx->inuse = 1;
702	prev->flags &= ~CF_NEW;	987	prev->flags &= ~CF_NEW;
703	prev->flags |= CF_RUNNING;	988	prev->flags |= CF_RUNNING;
704	}	989	}
705
706	/*TODO: must not croak here */
707	if (!prev->flags & CF_RUNNING)
708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710	if (next->flags & CF_RUNNING)
711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712		990
713	prev->flags &= ~CF_RUNNING;	991	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	992	next->flags |= CF_RUNNING;
715		993
716	LOCK;	994	LOCK;
…		…
718	if (next->flags & CF_NEW)	996	if (next->flags & CF_NEW)
719	{	997	{
720	/* need to start coroutine */	998	/* need to start coroutine */
721	next->flags &= ~CF_NEW;	999	next->flags &= ~CF_NEW;
722	/* first get rid of the old state */	1000	/* first get rid of the old state */
723	SAVE (prev, -1);	1001	save_perl (aTHX_ prev);
724	/* setup coroutine call */	1002	/* setup coroutine call */
725	setup_coro (next);	1003	setup_coro (aTHX_ next);
726	/* need a new stack */
727	assert (!next->stack);
728	}	1004	}
729	else	1005	else
730	{	1006	{
731	/* coroutine already started */	1007	/* coroutine already started */
732	SAVE (prev, flags);	1008	save_perl (aTHX_ prev);
733	LOAD (next);	1009	load_perl (aTHX_ next);
734	}	1010	}
735		1011
736	prev__cctx = prev->cctx;	1012	prev__cctx = prev->cctx;
737		1013
738	/* possibly "free" the cctx */	1014	/* possibly "free" the cctx */
739	if (prev__cctx->idle_sp == STACKLEVEL && 0)	1015	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
740	{	1016	{
741	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1017	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742	assert (PL_top_env == prev__cctx->top_env);	1018	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
743		1019
744	prev->cctx = 0;	1020	prev->cctx = 0;
745		1021
746	cctx_put (prev__cctx);	1022	cctx_put (prev__cctx);
747	prev__cctx->inuse = 0;
748	}	1023	}
749		1024
		1025	++next->usecount;
		1026
750	if (!next->cctx)	1027	if (!next->cctx)
751	{
752	next->cctx = cctx_get ();	1028	next->cctx = cctx_get (aTHX);
753	assert (!next->cctx->inuse);
754	next->cctx->inuse = 1;
755	}
756		1029
757	if (prev__cctx != next->cctx)	1030	if (prev__cctx != next->cctx)
758	{	1031	{
759	prev__cctx->top_env = PL_top_env;	1032	prev__cctx->top_env = PL_top_env;
760	PL_top_env = next->cctx->top_env;	1033	PL_top_env = next->cctx->top_env;
761	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1034	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762	}	1035	}
763		1036
764	free_coro_mortal ();	1037	free_coro_mortal (aTHX);
765
766	UNLOCK;	1038	UNLOCK;
767	}	1039	}
768	}	1040	}
769		1041
770	struct transfer_args	1042	struct transfer_args
771	{	1043	{
772	struct coro *prev, *next;	1044	struct coro *prev, *next;
773	int flags;
774	};	1045	};
775		1046
776	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1047	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1048	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
777		1049
		1050	/** high level stuff ********************************************************/
		1051
778	static void	1052	static int
779	coro_state_destroy (struct coro *coro)	1053	coro_state_destroy (pTHX_ struct coro *coro)
780	{	1054	{
781	if (coro->refcnt--)	1055	if (coro->flags & CF_DESTROYED)
782	return;	1056	return 0;
		1057
		1058	coro->flags |= CF_DESTROYED;
		1059
		1060	if (coro->flags & CF_READY)
		1061	{
		1062	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1063	/* alternative: look through all ready queues and remove the coro */
		1064	LOCK;
		1065	--coro_nready;
		1066	UNLOCK;
		1067	}
		1068	else
		1069	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
783		1070
784	if (coro->mainstack && coro->mainstack != main_mainstack)	1071	if (coro->mainstack && coro->mainstack != main_mainstack)
785	{	1072	{
786	struct coro temp;	1073	struct coro temp;
		1074
		1075	assert (!(coro->flags & CF_RUNNING));
		1076
		1077	Zero (&temp, 1, struct coro);
		1078	temp.save = CORO_SAVE_ALL;
787		1079
788	if (coro->flags & CF_RUNNING)	1080	if (coro->flags & CF_RUNNING)
789	croak ("FATAL: tried to destroy currently running coroutine");	1081	croak ("FATAL: tried to destroy currently running coroutine");
790		1082
791	SAVE ((&temp), TRANSFER_SAVE_ALL);	1083	save_perl (aTHX_ &temp);
792	LOAD (coro);	1084	load_perl (aTHX_ coro);
793		1085
794	coro_destroy_stacks ();	1086	coro_destroy_stacks (aTHX);
795		1087
796	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1088	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
797		1089
798	coro->mainstack = 0;	1090	coro->mainstack = 0;
799	}	1091	}
800		1092
801	cctx_destroy (coro->cctx);	1093	cctx_destroy (coro->cctx);
802	SvREFCNT_dec (coro->args);	1094	SvREFCNT_dec (coro->args);
803	Safefree (coro);	1095
		1096	if (coro->next) coro->next->prev = coro->prev;
		1097	if (coro->prev) coro->prev->next = coro->next;
		1098	if (coro == coro_first) coro_first = coro->next;
		1099
		1100	return 1;
804	}	1101	}
805		1102
806	static int	1103	static int
807	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1104	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808	{	1105	{
809	struct coro *coro = (struct coro *)mg->mg_ptr;	1106	struct coro *coro = (struct coro *)mg->mg_ptr;
810	mg->mg_ptr = 0;	1107	mg->mg_ptr = 0;
811		1108
		1109	coro->hv = 0;
		1110
		1111	if (--coro->refcnt < 0)
		1112	{
812	coro_state_destroy (coro);	1113	coro_state_destroy (aTHX_ coro);
		1114	Safefree (coro);
		1115	}
813		1116
814	return 0;	1117	return 0;
815	}	1118	}
816		1119
817	static int	1120	static int
…		…
824	return 0;	1127	return 0;
825	}	1128	}
826		1129
827	static MGVTBL coro_state_vtbl = {	1130	static MGVTBL coro_state_vtbl = {
828	0, 0, 0, 0,	1131	0, 0, 0, 0,
829	coro_state_clear,	1132	coro_state_free,
830	0,	1133	0,
831	#ifdef MGf_DUP	1134	#ifdef MGf_DUP
832	coro_state_dup,	1135	coro_state_dup,
833	#else	1136	#else
834	# define MGf_DUP 0	1137	# define MGf_DUP 0
835	#endif	1138	#endif
836	};	1139	};
837		1140
838	static struct coro *
839	SvSTATE (SV *coro)
840	{
841	HV *stash;
842	MAGIC *mg;
843
844	if (SvROK (coro))
845	coro = SvRV (coro);
846
847	stash = SvSTASH (coro);
848	if (stash != coro_stash && stash != coro_state_stash)
849	{
850	/* very slow, but rare, check */
851	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852	croak ("Coro::State object required");
853	}
854
855	mg = SvMAGIC (coro);
856	assert (mg->mg_type == PERL_MAGIC_ext);
857	return (struct coro *)mg->mg_ptr;
858	}
859
860	static void	1141	static void
861	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1142	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
862	{	1143	{
863	ta->prev = SvSTATE (prev);	1144	ta->prev = SvSTATE (prev_sv);
864	ta->next = SvSTATE (next);	1145	ta->next = SvSTATE (next_sv);
865	ta->flags = flags;	1146	TRANSFER_CHECK (*ta);
866	}	1147	}
867		1148
868	static void	1149	static void
869	api_transfer (SV *prev, SV *next, int flags)	1150	api_transfer (SV *prev_sv, SV *next_sv)
870	{	1151	{
		1152	dTHX;
871	struct transfer_args ta;	1153	struct transfer_args ta;
872		1154
873	prepare_transfer (&ta, prev, next, flags);	1155	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874	TRANSFER (ta);	1156	TRANSFER (ta);
875	}	1157	}
876		1158
		1159	static int
		1160	api_save (SV *coro_sv, int new_save)
		1161	{
		1162	dTHX;
		1163	struct coro *coro = SvSTATE (coro_sv);
		1164	int old_save = coro->save;
		1165
		1166	if (new_save >= 0)
		1167	coro->save = new_save;
		1168
		1169	return old_save;
		1170	}
		1171
877	/** Coro ********************************************************************/	1172	/** Coro ********************************************************************/
878		1173
879	#define PRIO_MAX 3
880	#define PRIO_HIGH 1
881	#define PRIO_NORMAL 0
882	#define PRIO_LOW -1
883	#define PRIO_IDLE -3
884	#define PRIO_MIN -4
885
886	/* for Coro.pm */
887	static SV *coro_current;
888	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889	static int coro_nready;
890
891	static void	1174	static void
892	coro_enq (SV *coro_sv)	1175	coro_enq (pTHX_ SV *coro_sv)
893	{	1176	{
894	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1177	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
895	coro_nready++;
896	}	1178	}
897		1179
898	static SV *	1180	static SV *
899	coro_deq (int min_prio)	1181	coro_deq (pTHX_ int min_prio)
900	{	1182	{
901	int prio = PRIO_MAX - PRIO_MIN;	1183	int prio = PRIO_MAX - PRIO_MIN;
902		1184
903	min_prio -= PRIO_MIN;	1185	min_prio -= PRIO_MIN;
904	if (min_prio < 0)	1186	if (min_prio < 0)
905	min_prio = 0;	1187	min_prio = 0;
906		1188
907	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1189	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
908	if (AvFILLp (coro_ready [prio]) >= 0)	1190	if (AvFILLp (coro_ready [prio]) >= 0)
909	{
910	coro_nready--;
911	return av_shift (coro_ready [prio]);	1191	return av_shift (coro_ready [prio]);
912	}
913		1192
914	return 0;	1193	return 0;
915	}	1194	}
916		1195
917	static int	1196	static int
918	api_ready (SV *coro_sv)	1197	api_ready (SV *coro_sv)
919	{	1198	{
		1199	dTHX;
920	struct coro *coro;	1200	struct coro *coro;
921		1201
922	if (SvROK (coro_sv))	1202	if (SvROK (coro_sv))
923	coro_sv = SvRV (coro_sv);	1203	coro_sv = SvRV (coro_sv);
924		1204
925	coro = SvSTATE (coro_sv);	1205	coro = SvSTATE (coro_sv);
926		1206
927	if (coro->flags & CF_READY)	1207	if (coro->flags & CF_READY)
928	return 0;	1208	return 0;
929		1209
930	#if 0 /* this is actually harmless */
931	if (coro->flags & CF_RUNNING)
932	croak ("Coro::ready called on currently running coroutine");
933	#endif
934
935	coro->flags |= CF_READY;	1210	coro->flags |= CF_READY;
936		1211
937	LOCK;	1212	LOCK;
938	coro_enq (SvREFCNT_inc (coro_sv));	1213	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1214	++coro_nready;
939	UNLOCK;	1215	UNLOCK;
940		1216
941	return 1;	1217	return 1;
942	}	1218	}
943		1219
944	static int	1220	static int
945	api_is_ready (SV *coro_sv)	1221	api_is_ready (SV *coro_sv)
946	{	1222	{
		1223	dTHX;
947	return !!SvSTATE (coro_sv)->flags & CF_READY;	1224	return !!(SvSTATE (coro_sv)->flags & CF_READY);
948	}	1225	}
949		1226
950	static void	1227	static void
951	prepare_schedule (struct transfer_args *ta)	1228	prepare_schedule (pTHX_ struct transfer_args *ta)
952	{	1229	{
953	SV *prev, *next;	1230	SV *prev_sv, *next_sv;
954		1231
955	for (;;)	1232	for (;;)
956	{	1233	{
957	LOCK;	1234	LOCK;
958	next = coro_deq (PRIO_MIN);	1235	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1236
		1237	/* nothing to schedule: call the idle handler */
		1238	if (!next_sv)
		1239	{
		1240	dSP;
		1241	UNLOCK;
		1242
		1243	ENTER;
		1244	SAVETMPS;
		1245
		1246	PUSHMARK (SP);
		1247	PUTBACK;
		1248	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1249
		1250	FREETMPS;
		1251	LEAVE;
		1252	continue;
		1253	}
		1254
		1255	ta->next = SvSTATE (next_sv);
		1256
		1257	/* cannot transfer to destroyed coros, skip and look for next */
		1258	if (ta->next->flags & CF_DESTROYED)
		1259	{
		1260	UNLOCK;
		1261	SvREFCNT_dec (next_sv);
		1262	/* coro_nready is already taken care of by destroy */
		1263	continue;
		1264	}
		1265
		1266	--coro_nready;
959	UNLOCK;	1267	UNLOCK;
960
961	if (next)
962	break;	1268	break;
963
964	{
965	dSP;
966
967	ENTER;
968	SAVETMPS;
969
970	PUSHMARK (SP);
971	PUTBACK;
972	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974	FREETMPS;
975	LEAVE;
976	}	1269	}
977	}
978
979	prev = SvRV (coro_current);
980	SvRV_set (coro_current, next);
981		1270
982	/* free this only after the transfer */	1271	/* free this only after the transfer */
		1272	prev_sv = SvRV (coro_current);
		1273	ta->prev = SvSTATE (prev_sv);
		1274	TRANSFER_CHECK (*ta);
		1275	assert (ta->next->flags & CF_READY);
		1276	ta->next->flags &= ~CF_READY;
		1277	SvRV_set (coro_current, next_sv);
		1278
983	LOCK;	1279	LOCK;
984	free_coro_mortal ();	1280	free_coro_mortal (aTHX);
		1281	coro_mortal = prev_sv;
985	UNLOCK;	1282	UNLOCK;
986	coro_mortal = prev;
987
988	assert (!SvROK(prev));//D
989	assert (!SvROK(next));//D
990
991	ta->prev = SvSTATE (prev);
992	ta->next = SvSTATE (next);
993	ta->flags = TRANSFER_SAVE_ALL;
994
995	assert (ta->flags & CF_READY);
996	ta->next->flags &= ~CF_READY;
997	}	1283	}
998		1284
999	static void	1285	static void
1000	prepare_cede (struct transfer_args *ta)	1286	prepare_cede (pTHX_ struct transfer_args *ta)
1001	{	1287	{
1002	api_ready (coro_current);	1288	api_ready (coro_current);
1003
1004	prepare_schedule (ta);	1289	prepare_schedule (aTHX_ ta);
		1290	}
		1291
		1292	static int
		1293	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1294	{
		1295	if (coro_nready)
		1296	{
		1297	SV *prev = SvRV (coro_current);
		1298	prepare_schedule (aTHX_ ta);
		1299	api_ready (prev);
		1300	return 1;
		1301	}
		1302	else
		1303	return 0;
1005	}	1304	}
1006		1305
1007	static void	1306	static void
1008	api_schedule (void)	1307	api_schedule (void)
1009	{	1308	{
		1309	dTHX;
1010	struct transfer_args ta;	1310	struct transfer_args ta;
1011		1311
1012	prepare_schedule (&ta);	1312	prepare_schedule (aTHX_ &ta);
1013	TRANSFER (ta);	1313	TRANSFER (ta);
1014	}	1314	}
1015		1315
1016	static void	1316	static int
1017	api_cede (void)	1317	api_cede (void)
1018	{	1318	{
		1319	dTHX;
1019	struct transfer_args ta;	1320	struct transfer_args ta;
1020		1321
1021	prepare_cede (&ta);	1322	prepare_cede (aTHX_ &ta);
		1323
		1324	if (ta.prev != ta.next)
		1325	{
1022	TRANSFER (ta);	1326	TRANSFER (ta);
		1327	return 1;
		1328	}
		1329	else
		1330	return 0;
		1331	}
		1332
		1333	static int
		1334	api_cede_notself (void)
		1335	{
		1336	dTHX;
		1337	struct transfer_args ta;
		1338
		1339	if (prepare_cede_notself (aTHX_ &ta))
		1340	{
		1341	TRANSFER (ta);
		1342	return 1;
		1343	}
		1344	else
		1345	return 0;
1023	}	1346	}
1024		1347
1025	MODULE = Coro::State PACKAGE = Coro::State	1348	MODULE = Coro::State PACKAGE = Coro::State
1026		1349
1027	PROTOTYPES: DISABLE	1350	PROTOTYPES: DISABLE
…		…
1033	#endif	1356	#endif
1034	BOOT_PAGESIZE;	1357	BOOT_PAGESIZE;
1035		1358
1036	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1359	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037		1360
		1361	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1362	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1363	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1364	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1365
1038	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1366	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1367	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1040	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1368	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1369	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1370	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1371	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1372	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1041		1373
1042	main_mainstack = PL_mainstack;	1374	main_mainstack = PL_mainstack;
		1375	main_top_env = PL_top_env;
		1376
		1377	while (main_top_env->je_prev)
		1378	main_top_env = main_top_env->je_prev;
1043		1379
1044	coroapi.ver = CORO_API_VERSION;	1380	coroapi.ver = CORO_API_VERSION;
1045	coroapi.transfer = api_transfer;	1381	coroapi.transfer = api_transfer;
1046		1382
1047	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1383	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1055	HV *hv;	1391	HV *hv;
1056	int i;	1392	int i;
1057		1393
1058	Newz (0, coro, 1, struct coro);	1394	Newz (0, coro, 1, struct coro);
1059	coro->args = newAV ();	1395	coro->args = newAV ();
		1396	coro->save = CORO_SAVE_DEF;
1060	coro->flags = CF_NEW;	1397	coro->flags = CF_NEW;
1061		1398
		1399	if (coro_first) coro_first->prev = coro;
		1400	coro->next = coro_first;
		1401	coro_first = coro;
		1402
1062	hv = newHV ();	1403	coro->hv = hv = newHV ();
1063	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1404	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1064	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1405	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065		1406
1066	for (i = 1; i < items; i++)	1407	for (i = 1; i < items; i++)
1067	av_push (coro->args, newSVsv (ST (i)));	1408	av_push (coro->args, newSVsv (ST (i)));
1068	}	1409	}
1069	OUTPUT:	1410	OUTPUT:
		1411	RETVAL
		1412
		1413	int
		1414	save (SV *coro, int new_save = -1)
		1415	CODE:
		1416	RETVAL = api_save (coro, new_save);
		1417	OUTPUT:
		1418	RETVAL
		1419
		1420	int
		1421	save_also (SV *coro_sv, int save_also)
		1422	CODE:
		1423	{
		1424	struct coro *coro = SvSTATE (coro_sv);
		1425	RETVAL = coro->save;
		1426	coro->save |= save_also;
		1427	}
		1428	OUTPUT:
1070	RETVAL	1429	RETVAL
1071		1430
1072	void	1431	void
1073	_set_stacklevel (...)	1432	_set_stacklevel (...)
1074	ALIAS:	1433	ALIAS:
1075	Coro::State::transfer = 1	1434	Coro::State::transfer = 1
1076	Coro::schedule = 2	1435	Coro::schedule = 2
1077	Coro::cede = 3	1436	Coro::cede = 3
		1437	Coro::cede_notself = 4
1078	CODE:	1438	CODE:
1079	{	1439	{
1080	struct transfer_args ta;	1440	struct transfer_args ta;
1081		1441
1082	switch (ix)	1442	switch (ix)
1083	{	1443	{
1084	case 0:	1444	case 0:
1085	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1445	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1086	ta.next = 0;	1446	ta.next = 0;
1087	ta.flags = TRANSFER_SET_STACKLEVEL;
1088	break;	1447	break;
1089		1448
1090	case 1:	1449	case 1:
1091	if (items != 3)	1450	if (items != 2)
1092	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1451	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1093		1452
1094	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1453	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1095	break;	1454	break;
1096		1455
1097	case 2:	1456	case 2:
1098	prepare_schedule (&ta);	1457	prepare_schedule (aTHX_ &ta);
1099	break;	1458	break;
1100		1459
1101	case 3:	1460	case 3:
1102	prepare_cede (&ta);	1461	prepare_cede (aTHX_ &ta);
		1462	break;
		1463
		1464	case 4:
		1465	if (!prepare_cede_notself (aTHX_ &ta))
		1466	XSRETURN_EMPTY;
		1467
1103	break;	1468	break;
1104	}	1469	}
1105		1470
		1471	BARRIER;
1106	TRANSFER (ta);	1472	TRANSFER (ta);
1107	}
1108		1473
1109	void	1474	if (GIMME_V != G_VOID && ta.next != ta.prev)
1110	_clone_state_from (SV *dst, SV *src)	1475	XSRETURN_YES;
		1476	}
		1477
		1478	bool
		1479	_destroy (SV *coro_sv)
1111	CODE:	1480	CODE:
1112	{	1481	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1113	struct coro *coro_src = SvSTATE (src);	1482	OUTPUT:
1114		1483	RETVAL
1115	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1116
1117	++coro_src->refcnt;
1118	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1119	}
1120		1484
1121	void	1485	void
1122	_exit (code)	1486	_exit (code)
1123	int code	1487	int code
1124	PROTOTYPE: $	1488	PROTOTYPE: $
1125	CODE:	1489	CODE:
1126	_exit (code);	1490	_exit (code);
1127		1491
1128	int	1492	int
		1493	cctx_stacksize (int new_stacksize = 0)
		1494	CODE:
		1495	RETVAL = coro_stacksize;
		1496	if (new_stacksize)
		1497	coro_stacksize = new_stacksize;
		1498	OUTPUT:
		1499	RETVAL
		1500
		1501	int
1129	cctx_count ()	1502	cctx_count ()
1130	CODE:	1503	CODE:
1131	RETVAL = cctx_count;	1504	RETVAL = cctx_count;
1132	OUTPUT:	1505	OUTPUT:
1133	RETVAL	1506	RETVAL
…		…
1137	CODE:	1510	CODE:
1138	RETVAL = cctx_idle;	1511	RETVAL = cctx_idle;
1139	OUTPUT:	1512	OUTPUT:
1140	RETVAL	1513	RETVAL
1141		1514
		1515	void
		1516	list ()
		1517	PPCODE:
		1518	{
		1519	struct coro *coro;
		1520	for (coro = coro_first; coro; coro = coro->next)
		1521	if (coro->hv)
		1522	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1523	}
		1524
		1525	void
		1526	call (Coro::State coro, SV *coderef)
		1527	ALIAS:
		1528	eval = 1
		1529	CODE:
		1530	{
		1531	if (coro->mainstack)
		1532	{
		1533	struct coro temp;
		1534	Zero (&temp, 1, struct coro);
		1535	temp.save = CORO_SAVE_ALL;
		1536
		1537	if (!(coro->flags & CF_RUNNING))
		1538	{
		1539	save_perl (aTHX_ &temp);
		1540	load_perl (aTHX_ coro);
		1541	}
		1542
		1543	{
		1544	dSP;
		1545	ENTER;
		1546	SAVETMPS;
		1547	PUSHMARK (SP);
		1548	PUTBACK;
		1549	if (ix)
		1550	eval_sv (coderef, 0);
		1551	else
		1552	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1553	SPAGAIN;
		1554	FREETMPS;
		1555	LEAVE;
		1556	PUTBACK;
		1557	}
		1558
		1559	if (!(coro->flags & CF_RUNNING))
		1560	{
		1561	save_perl (aTHX_ coro);
		1562	load_perl (aTHX_ &temp);
		1563	}
		1564	}
		1565	}
		1566
		1567	SV *
		1568	is_ready (Coro::State coro)
		1569	PROTOTYPE: $
		1570	ALIAS:
		1571	is_ready = CF_READY
		1572	is_running = CF_RUNNING
		1573	is_new = CF_NEW
		1574	is_destroyed = CF_DESTROYED
		1575	CODE:
		1576	RETVAL = boolSV (coro->flags & ix);
		1577	OUTPUT:
		1578	RETVAL
		1579
		1580	void
		1581	trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1582	CODE:
		1583	if (flags & CC_TRACE)
		1584	{
		1585	if (!coro->cctx)
		1586	coro->cctx = cctx_new ();
		1587	else if (!(coro->cctx->flags & CC_TRACE))
		1588	croak ("cannot enable tracing on coroutine with custom stack");
		1589
		1590	coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
		1591	}
		1592	else
		1593	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1594	{
		1595	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1596	coro->cctx->flags |= CC_NOREUSE;
		1597
		1598	if (coro->flags & CF_RUNNING)
		1599	PL_runops = RUNOPS_DEFAULT;
		1600	else
		1601	coro->runops = RUNOPS_DEFAULT;
		1602	}
		1603
		1604	SV *
		1605	has_stack (Coro::State coro)
		1606	PROTOTYPE: $
		1607	CODE:
		1608	RETVAL = boolSV (!!coro->cctx);
		1609	OUTPUT:
		1610	RETVAL
		1611
		1612	int
		1613	is_traced (Coro::State coro)
		1614	PROTOTYPE: $
		1615	CODE:
		1616	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1617	OUTPUT:
		1618	RETVAL
		1619
		1620	IV
		1621	rss (Coro::State coro)
		1622	PROTOTYPE: $
		1623	ALIAS:
		1624	usecount = 1
		1625	CODE:
		1626	switch (ix)
		1627	{
		1628	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1629	case 1: RETVAL = coro->usecount; break;
		1630	}
		1631	OUTPUT:
		1632	RETVAL
		1633
		1634
1142	MODULE = Coro::State PACKAGE = Coro	1635	MODULE = Coro::State PACKAGE = Coro
1143		1636
1144	BOOT:	1637	BOOT:
1145	{	1638	{
1146	int i;	1639	int i;
		1640
		1641	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1642	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1643	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1644
		1645	coro_current = get_sv ("Coro::current", FALSE);
		1646	SvREADONLY_on (coro_current);
1147		1647
1148	coro_stash = gv_stashpv ("Coro", TRUE);	1648	coro_stash = gv_stashpv ("Coro", TRUE);
1149		1649
1150	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1650	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1151	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1651	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1152	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1652	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1153	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1653	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1154	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1654	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1155	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1655	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1156		1656
1157	coro_current = get_sv ("Coro::current", FALSE);
1158	SvREADONLY_on (coro_current);
1159
1160	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1657	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1161	coro_ready[i] = newAV ();	1658	coro_ready[i] = newAV ();
1162		1659
1163	{	1660	{
1164	SV *sv = perl_get_sv("Coro::API", 1);	1661	SV *sv = perl_get_sv("Coro::API", 1);
1165		1662
1166	coroapi.schedule = api_schedule;	1663	coroapi.schedule = api_schedule;
		1664	coroapi.save = api_save;
1167	coroapi.cede = api_cede;	1665	coroapi.cede = api_cede;
		1666	coroapi.cede_notself = api_cede_notself;
1168	coroapi.ready = api_ready;	1667	coroapi.ready = api_ready;
1169	coroapi.is_ready = api_is_ready;	1668	coroapi.is_ready = api_is_ready;
1170	coroapi.nready = &coro_nready;	1669	coroapi.nready = &coro_nready;
1171	coroapi.current = coro_current;	1670	coroapi.current = coro_current;
1172		1671
1173	GCoroAPI = &coroapi;	1672	GCoroAPI = &coroapi;
1174	sv_setiv (sv, (IV)&coroapi);	1673	sv_setiv (sv, (IV)&coroapi);
1175	SvREADONLY_on (sv);	1674	SvREADONLY_on (sv);
1176	}	1675	}
1177	}	1676	}
		1677
		1678	void
		1679	_set_current (SV *current)
		1680	PROTOTYPE: $
		1681	CODE:
		1682	SvREFCNT_dec (SvRV (coro_current));
		1683	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1178		1684
1179	int	1685	int
1180	prio (Coro::State coro, int newprio = 0)	1686	prio (Coro::State coro, int newprio = 0)
1181	ALIAS:	1687	ALIAS:
1182	nice = 1	1688	nice = 1
…		…
1185	RETVAL = coro->prio;	1691	RETVAL = coro->prio;
1186		1692
1187	if (items > 1)	1693	if (items > 1)
1188	{	1694	{
1189	if (ix)	1695	if (ix)
1190	newprio += coro->prio;	1696	newprio = coro->prio - newprio;
1191		1697
1192	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1698	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1193	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1699	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1194		1700
1195	coro->prio = newprio;	1701	coro->prio = newprio;
1196	}	1702	}
1197	}	1703	}
		1704	OUTPUT:
		1705	RETVAL
1198		1706
1199	SV *	1707	SV *
1200	ready (SV *self)	1708	ready (SV *self)
1201	PROTOTYPE: $	1709	PROTOTYPE: $
1202	CODE:	1710	CODE:
1203	RETVAL = boolSV (api_ready (self));	1711	RETVAL = boolSV (api_ready (self));
1204	OUTPUT:	1712	OUTPUT:
1205	RETVAL	1713	RETVAL
1206		1714
1207	SV *
1208	is_ready (SV *self)
1209	PROTOTYPE: $
1210	CODE:
1211	RETVAL = boolSV (api_is_ready (self));
1212	OUTPUT:
1213	RETVAL
1214
1215	int	1715	int
1216	nready (...)	1716	nready (...)
1217	PROTOTYPE:	1717	PROTOTYPE:
1218	CODE:	1718	CODE:
1219	RETVAL = coro_nready;	1719	RETVAL = coro_nready;
1220	OUTPUT:	1720	OUTPUT:
1221	RETVAL	1721	RETVAL
1222		1722
		1723	# for async_pool speedup
1223	void	1724	void
1224	_set_current (SV *current)	1725	_pool_1 (SV *cb)
1225	PROTOTYPE: $
1226	CODE:	1726	CODE:
1227	SvREFCNT_dec (SvRV (coro_current));	1727	{
1228	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1728	int i, len;
		1729	HV *hv = (HV *)SvRV (coro_current);
		1730	AV *defav = GvAV (PL_defgv);
		1731	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1732	AV *invoke_av;
		1733
		1734	if (!invoke)
		1735	croak ("\3terminate\2\n");
		1736
		1737	hv_store (hv, "desc", sizeof ("desc") - 1,
		1738	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1739
		1740	invoke_av = (AV *)SvRV (invoke);
		1741	len = av_len (invoke_av);
		1742
		1743	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1744
		1745	if (len > 0)
		1746	{
		1747	av_fill (defav, len - 1);
		1748	for (i = 0; i < len; ++i)
		1749	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1750	}
		1751
		1752	SvREFCNT_dec (invoke);
		1753	}
		1754
		1755	void
		1756	_pool_2 (SV *cb)
		1757	CODE:
		1758	{
		1759	struct coro *coro = SvSTATE (coro_current);
		1760
		1761	sv_setsv (cb, &PL_sv_undef);
		1762
		1763	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1764	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1765	croak ("\3terminate\2\n");
		1766
		1767	av_clear (GvAV (PL_defgv));
		1768	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1769	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1770	coro->save = CORO_SAVE_DEF;
		1771	coro->prio = 0;
		1772	av_push (av_async_pool, newSVsv (coro_current));
		1773	}
		1774
1229		1775
1230	MODULE = Coro::State PACKAGE = Coro::AIO	1776	MODULE = Coro::State PACKAGE = Coro::AIO
1231		1777
1232	SV *	1778	SV *
1233	_get_state ()	1779	_get_state ()
1234	CODE:	1780	CODE:
1235	{	1781	{
1236	struct {	1782	struct io_state *data;
1237	int errorno;
1238	int laststype;
1239	int laststatval;
1240	Stat_t statcache;
1241	} data;
1242		1783
		1784	RETVAL = newSV (sizeof (struct io_state));
		1785	data = (struct io_state *)SvPVX (RETVAL);
		1786	SvCUR_set (RETVAL, sizeof (struct io_state));
		1787	SvPOK_only (RETVAL);
		1788
1243	data.errorno = errno;	1789	data->errorno = errno;
1244	data.laststype = PL_laststype;	1790	data->laststype = PL_laststype;
1245	data.laststatval = PL_laststatval;	1791	data->laststatval = PL_laststatval;
1246	data.statcache = PL_statcache;	1792	data->statcache = PL_statcache;
1247
1248	RETVAL = newSVpvn ((char *)&data, sizeof data);
1249	}	1793	}
1250	OUTPUT:	1794	OUTPUT:
1251	RETVAL	1795	RETVAL
1252		1796
1253	void	1797	void
1254	_set_state (char *data_)	1798	_set_state (char *data_)
1255	PROTOTYPE: $	1799	PROTOTYPE: $
1256	CODE:	1800	CODE:
1257	{	1801	{
1258	struct {	1802	struct io_state *data = (void *)data_;
1259	int errorno;
1260	int laststype;
1261	int laststatval;
1262	Stat_t statcache;
1263	} *data = (void *)data_;
1264		1803
1265	errno = data->errorno;	1804	errno = data->errorno;
1266	PL_laststype = data->laststype;	1805	PL_laststype = data->laststype;
1267	PL_laststatval = data->laststatval;	1806	PL_laststatval = data->laststatval;
1268	PL_statcache = data->statcache;	1807	PL_statcache = data->statcache;
1269	}	1808	}
		1809

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