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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.117 by root, Fri Dec 1 19:41:06 2006 UTC vs.
Revision 1.178 by root, Wed Oct 3 01:48:06 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	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
111	static struct coro_cctx *cctx_first;	144	static struct coro_cctx *cctx_first;
112	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	};
113		155
114	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
115	typedef struct coro_cctx {	157	typedef struct coro_cctx {
116	struct coro_cctx *next;	158	struct coro_cctx *next;
117		159
118	/* the stack */	160	/* the stack */
119	void *sptr;	161	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
121		163
122	/* cpu state */	164	/* cpu state */
123	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 */
124	JMPENV *top_env;	167	JMPENV *top_env;
125	coro_context cctx;	168	coro_context cctx;
126		169
127	int inuse;
128
129	#if USE_VALGRIND	170	#if CORO_USE_VALGRIND
130	int valgrind_id;	171	int valgrind_id;
131	#endif	172	#endif
		173	unsigned char flags;
132	} coro_cctx;	174	} coro_cctx;
133		175
134	enum {	176	enum {
135	CF_RUNNING = 0x0001, /* coroutine is running */	177	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY = 0x0002, /* coroutine is ready */	178	CF_READY = 0x0002, /* coroutine is ready */
137	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 */
138	};	181	};
139		182
140	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
141	struct coro {	184	struct coro {
142	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
143	coro_cctx *cctx;	186	coro_cctx *cctx;
144		187
145	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
146	AV *args;	189	AV *args;
147	int refcnt;	190	int refcnt;
148	int flags;	191	int flags; /* CF_ flags */
149		192
150	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
151	AV *defav;	194	AV *defav; /* @_ */
152	SV *defsv;	195	SV *defsv; /* $_ */
153	SV *errsv;	196	SV *errsv; /* $@ */
		197	IO *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
154		200
155	#define VAR(name,type) type name;	201	#define VAR(name,type) type name;
156	# include "state.h"	202	# include "state.h"
157	#undef VAR	203	#undef VAR
158		204
		205	/* statistics */
		206	int usecount; /* number of switches to this coro */
		207
159	/* coro process data */	208	/* coro process data */
160	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 */
161	};	214	};
162		215
163	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
165		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
166	static AV *	236	static AV *
167	coro_clone_padlist (CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
168	{	238	{
169	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	240	AV *newpadlist, *newpad;
171		241
172	newpadlist = newAV ();	242	newpadlist = newAV ();
…		…
184		254
185	return newpadlist;	255	return newpadlist;
186	}	256	}
187		257
188	static void	258	static void
189	free_padlist (AV *padlist)	259	free_padlist (pTHX_ AV *padlist)
190	{	260	{
191	/* may be during global destruction */	261	/* may be during global destruction */
192	if (SvREFCNT (padlist))	262	if (SvREFCNT (padlist))
193	{	263	{
194	I32 i = AvFILLp (padlist);	264	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	285	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	286	AV *av = (AV *)mg->mg_obj;
217		287
218	/* casting is fun. */	288	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	289	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	290	free_padlist (aTHX_ padlist);
221		291
222	SvREFCNT_dec (av);	292	SvREFCNT_dec (av);
223		293
224	return 0;	294	return 0;
225	}	295	}
…		…
233	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234	? SvMAGIC (cv) \	304	? SvMAGIC (cv) \
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
236	: 0	306	: 0
237		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
238	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
239	static void	335	static void
240	get_padlist (CV *cv)	336	get_padlist (pTHX_ CV *cv)
241	{	337	{
242	MAGIC *mg = CORO_MAGIC (cv);	338	MAGIC *mg = CORO_MAGIC (cv);
243	AV *av;	339	AV *av;
244		340
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	343	else
248	{	344	{
249	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	346	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	347	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
255	#else	351	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	353	#endif
258	}	354	}
259	}	355	}
260		356
261	static void	357	static void
262	put_padlist (CV *cv)	358	put_padlist (pTHX_ CV *cv)
263	{	359	{
264	MAGIC *mg = CORO_MAGIC (cv);	360	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	361	AV *av;
266		362
267	if (!mg)	363	if (!mg)
…		…
278	av_extend (av, AvMAX (av) + 1);	374	av_extend (av, AvMAX (av) + 1);
279		375
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	377	}
282		378
283	#define SB do {	379	/** load & save, init *******************************************************/
284	#define SE } while (0)
285		380
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
290
291	static void	381	static void
292	load_state (Coro__State c)	382	load_perl (pTHX_ Coro__State c)
293	{	383	{
294	#define VAR(name,type) PL_ ## name = c->name;	384	#define VAR(name,type) PL_ ## name = c->name;
295	# include "state.h"	385	# include "state.h"
296	#undef VAR	386	#undef VAR
297		387
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	388	GvSV (PL_defgv) = c->defsv;
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	389	GvAV (PL_defgv) = c->defav;
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	390	GvSV (PL_errgv) = c->errsv;
		391	GvIOp(PL_defoutgv) = c->deffh;
		392	PL_rs = c->irssv;
		393	GvSV (irsgv) = c->irssv_sv;
301		394
302	{	395	{
303	dSP;	396	dSP;
304	CV *cv;	397	CV *cv;
305		398
306	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
308	{	401	{
309	put_padlist (cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	403	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	404	CvPADLIST (cv) = (AV *)POPs;
312	}	405	}
313		406
314	PUTBACK;	407	PUTBACK;
315	}	408	}
316	}	409	}
317		410
318	static void	411	static void
319	save_state (Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
320	{	413	{
321	{	414	{
322	dSP;	415	dSP;
323	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
327	/*	420	/*
328	* 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
329	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
330	*/	423	*/
331		424
332	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
334	for (;;)	427	for (;;)
335	{	428	{
336	while (cxix >= 0)	429	while (cxix >= 0)
337	{	430	{
338	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
339		432
340	if (CxTYPE (cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
341	{	434	{
342	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
343		436
344	if (CvDEPTH (cv))	437	if (CvDEPTH (cv))
345	{	438	{
346	EXTEND (SP, 3);	439	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	440	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
351		443
352	CvDEPTH (cv) = 0;	444	CvDEPTH (cv) = 0;
353	get_padlist (cv);	445	get_padlist (aTHX_ cv);
354	}	446	}
355	}	447	}
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	}	448	}
365		449
366	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
367	break;	451	break;
368		452
369	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
370	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
371	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
372	}	456	}
373		457
374	PUTBACK;	458	PUTBACK;
375	}	459	}
376		460
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = GvIOp (PL_defoutgv);
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
380		467
381	#define VAR(name,type)c->name = PL_ ## name;	468	#define VAR(name,type)c->name = PL_ ## name;
382	# include "state.h"	469	# include "state.h"
383	#undef VAR	470	#undef VAR
384	}	471	}
…		…
387	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
391	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
392	static void	482	static void
393	coro_init_stacks ()	483	coro_init_stacks (pTHX)
394	{	484	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	485	PL_curstackinfo = new_stackinfo(64, 6);
396	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399		489
400	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
401	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403		493
404	New(50,PL_tmps_stack,128,SV*);	494	New(50,PL_tmps_stack,64,SV*);
405	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
406	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
407	PL_tmps_max = 128;	497	PL_tmps_max = 64;
408		498
409	New(54,PL_markstack,32,I32);	499	New(54,PL_markstack,16,I32);
410	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
411	PL_markstack_max = PL_markstack + 32;	501	PL_markstack_max = PL_markstack + 16;
412		502
413	#ifdef SET_MARK_OFFSET	503	#ifdef SET_MARK_OFFSET
414	SET_MARK_OFFSET;	504	SET_MARK_OFFSET;
415	#endif	505	#endif
416		506
417	New(54,PL_scopestack,32,I32);	507	New(54,PL_scopestack,16,I32);
418	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
419	PL_scopestack_max = 32;	509	PL_scopestack_max = 16;
420		510
421	New(54,PL_savestack,64,ANY);	511	New(54,PL_savestack,64,ANY);
422	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
423	PL_savestack_max = 64;	513	PL_savestack_max = 64;
424		514
425	#if !PERL_VERSION_ATLEAST (5,9,0)	515	#if !PERL_VERSION_ATLEAST (5,9,0)
426	New(54,PL_retstack,16,OP*);	516	New(54,PL_retstack,4,OP*);
427	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	518	PL_retstack_max = 4;
429	#endif	519	#endif
430	}	520	}
		521	#endif
431		522
432	/*	523	/*
433	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
434	*/	525	*/
435	static void	526	static void
436	coro_destroy_stacks ()	527	coro_destroy_stacks (pTHX)
437	{	528	{
438	if (!IN_DESTRUCT)
439	{
440	/* is this ugly, I ask? */
441	LEAVE_SCOPE (0);
442
443	/* sure it is, but more important: is it correct?? :/ */
444	FREETMPS;
445
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447	}
448
449	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
451		531
452	while (PL_curstackinfo)	532	while (PL_curstackinfo)
453	{	533	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
455		535
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		538
468	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	541	PL_curstackinfo = p;
471	}	542	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	548	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	549	Safefree (PL_retstack);
479	#endif	550	#endif
480	}	551	}
481		552
		553	static size_t
		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
482	static void	586	static void
483	setup_coro (struct coro *coro)	587	setup_coro (pTHX_ struct coro *coro)
484	{	588	{
485	/*	589	/*
486	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
487	*/	591	*/
488
489	coro_init_stacks ();	592	coro_init_stacks (aTHX);
490		593
		594	PL_runops = RUNOPS_DEFAULT;
491	PL_curcop = &PL_compiling;	595	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
493	PL_curpm = 0;	598	PL_curpm = 0;
494	PL_localizing = 0;	599	PL_localizing = 0;
495	PL_dirty = 0;	600	PL_dirty = 0;
496	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) = newSVsv (PL_rs);
		607	PL_rs = newSVpvn ("\n", 1);
		608
		609	{
		610	IO *io = newIO ();
		611	GvIOp(PL_defoutgv) = io;
		612	IoTYPE (io) = IoTYPE_WRONLY;
		613	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		614	IoFLAGS (io) |= IOf_FLUSH;
		615	}
497		616
498	{	617	{
499	dSP;	618	dSP;
500	LOGOP myop;	619	LOGOP myop;
501		620
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508	Zero (&myop, 1, LOGOP);	621	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	622	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	623	myop.op_flags = OPf_WANT_VOID;
511		624
		625	PUSHMARK (SP);
		626	XPUSHs (av_shift (GvAV (PL_defgv)));
		627	PUTBACK;
512	PL_op = (OP *)&myop;	628	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);	629	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	630	SPAGAIN;
519	}	631	}
520		632
521	ENTER; /* necessary e.g. for dounwind */	633	ENTER; /* necessary e.g. for dounwind */
522	}	634	}
523		635
524	static void	636	static void
		637	destroy_coro (pTHX_ struct coro *coro)
		638	{
		639	if (!IN_DESTRUCT)
		640	{
		641	/* restore all saved variables and stuff */
		642	LEAVE_SCOPE (0);
		643	assert (PL_tmps_floor == -1);
		644
		645	/* free all temporaries */
		646	FREETMPS;
		647	assert (PL_tmps_ix == -1);
		648
		649	/* unwind all extra stacks */
		650	POPSTACK_TO (PL_mainstack);
		651
		652	/* unwind main stack */
		653	dounwind (-1);
		654	}
		655
		656	SvREFCNT_dec (GvSV (PL_defgv));
		657	SvREFCNT_dec (GvAV (PL_defgv));
		658	SvREFCNT_dec (GvSV (PL_errgv));
		659	SvREFCNT_dec (GvIOp(PL_defoutgv));
		660	SvREFCNT_dec (PL_rs);
		661	SvREFCNT_dec (GvSV (irsgv));
		662
		663	coro_destroy_stacks (aTHX);
		664	}
		665
		666	static void
525	free_coro_mortal ()	667	free_coro_mortal (pTHX)
526	{	668	{
527	if (coro_mortal)	669	if (coro_mortal)
528	{	670	{
529	SvREFCNT_dec (coro_mortal);	671	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	672	coro_mortal = 0;
531	}	673	}
532	}	674	}
533		675
		676	static int
		677	runops_trace (pTHX)
		678	{
		679	COP *oldcop = 0;
		680	int oldcxix = -2;
		681	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		682	coro_cctx *cctx = coro->cctx;
		683
		684	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		685	{
		686	PERL_ASYNC_CHECK ();
		687
		688	if (cctx->flags & CC_TRACE_ALL)
		689	{
		690	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		691	{
		692	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		693	SV **bot, **top;
		694	AV *av = newAV (); /* return values */
		695	SV **cb;
		696	dSP;
		697
		698	GV *gv = CvGV (cx->blk_sub.cv);
		699	SV *fullname = sv_2mortal (newSV (0));
		700	if (isGV (gv))
		701	gv_efullname3 (fullname, gv, 0);
		702
		703	bot = PL_stack_base + cx->blk_oldsp + 1;
		704	top = cx->blk_gimme == G_ARRAY ? SP + 1
		705	: cx->blk_gimme == G_SCALAR ? bot + 1
		706	: bot;
		707
		708	while (bot < top)
		709	av_push (av, SvREFCNT_inc (*bot++));
		710
		711	PL_runops = RUNOPS_DEFAULT;
		712	ENTER;
		713	SAVETMPS;
		714	EXTEND (SP, 3);
		715	PUSHMARK (SP);
		716	PUSHs (&PL_sv_no);
		717	PUSHs (fullname);
		718	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		719	PUTBACK;
		720	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		721	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		722	SPAGAIN;
		723	FREETMPS;
		724	LEAVE;
		725	PL_runops = runops_trace;
		726	}
		727
		728	if (oldcop != PL_curcop)
		729	{
		730	oldcop = PL_curcop;
		731
		732	if (PL_curcop != &PL_compiling)
		733	{
		734	SV **cb;
		735
		736	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		737	{
		738	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		739
		740	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		741	{
		742	runops_proc_t old_runops = PL_runops;
		743	dSP;
		744	GV *gv = CvGV (cx->blk_sub.cv);
		745	SV *fullname = sv_2mortal (newSV (0));
		746
		747	if (isGV (gv))
		748	gv_efullname3 (fullname, gv, 0);
		749
		750	PL_runops = RUNOPS_DEFAULT;
		751	ENTER;
		752	SAVETMPS;
		753	EXTEND (SP, 3);
		754	PUSHMARK (SP);
		755	PUSHs (&PL_sv_yes);
		756	PUSHs (fullname);
		757	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		758	PUTBACK;
		759	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		760	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		761	SPAGAIN;
		762	FREETMPS;
		763	LEAVE;
		764	PL_runops = runops_trace;
		765	}
		766
		767	oldcxix = cxstack_ix;
		768	}
		769
		770	if (cctx->flags & CC_TRACE_LINE)
		771	{
		772	dSP;
		773
		774	PL_runops = RUNOPS_DEFAULT;
		775	ENTER;
		776	SAVETMPS;
		777	EXTEND (SP, 3);
		778	PL_runops = RUNOPS_DEFAULT;
		779	PUSHMARK (SP);
		780	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		781	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		782	PUTBACK;
		783	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		784	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		785	SPAGAIN;
		786	FREETMPS;
		787	LEAVE;
		788	PL_runops = runops_trace;
		789	}
		790	}
		791	}
		792	}
		793	}
		794
		795	TAINT_NOT;
		796	return 0;
		797	}
		798
		799	/* inject a fake call to Coro::State::_cctx_init into the execution */
		800	/* _cctx_init should be careful, as it could be called at almost any time */
		801	/* during execution of a perl program */
534	static void NOINLINE	802	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	803	prepare_cctx (pTHX_ coro_cctx *cctx)
536	{	804	{
537	dSP;	805	dSP;
538	LOGOP myop;	806	LOGOP myop;
539		807
		808	PL_top_env = &PL_start_env;
		809
		810	if (cctx->flags & CC_TRACE)
		811	PL_runops = runops_trace;
		812
540	Zero (&myop, 1, LOGOP);	813	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	814	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	815	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		816
546	PUSHMARK (SP);	817	PUSHMARK (SP);
		818	EXTEND (SP, 2);
		819	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	820	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	821	PUTBACK;
		822	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	823	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	824	SPAGAIN;
551	}	825	}
552		826
		827	/*
		828	* this is a _very_ stripped down perl interpreter ;)
		829	*/
553	static void	830	static void
554	coro_run (void *arg)	831	coro_run (void *arg)
555	{	832	{
		833	dTHX;
		834
556	/* coro_run is the alternative epilogue of transfer() */	835	/* coro_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	836	UNLOCK;
558		837
		838	/* we now skip the entersub that lead to transfer() */
		839	PL_op = PL_op->op_next;
		840
		841	/* inject a fake subroutine call to cctx_init */
		842	prepare_cctx (aTHX_ (coro_cctx *)arg);
		843
		844	/* somebody or something will hit me for both perl_run and PL_restartop */
		845	PL_restartop = PL_op;
		846	perl_run (PL_curinterp);
		847
559	/*	848	/*
560	* this is a _very_ stripped down perl interpreter ;)	849	* If perl-run returns we assume exit() was being called or the coro
		850	* fell off the end, which seems to be the only valid (non-bug)
		851	* reason for perl_run to return. We try to exit by jumping to the
		852	* bootstrap-time "top" top_env, as we cannot restore the "main"
		853	* coroutine as Coro has no such concept
561	*/	854	*/
562	PL_top_env = &PL_start_env;	855	PL_top_env = main_top_env;
563		856	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	}	857	}
573		858
574	static coro_cctx *	859	static coro_cctx *
575	cctx_new ()	860	cctx_new ()
576	{	861	{
577	coro_cctx *cctx;	862	coro_cctx *cctx;
		863	void *stack_start;
		864	size_t stack_size;
578		865
579	++cctx_count;	866	++cctx_count;
580		867
581	New (0, cctx, 1, coro_cctx);	868	Newz (0, cctx, 1, coro_cctx);
582		869
583	#if HAVE_MMAP	870	#if HAVE_MMAP
584		871
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	872	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	873	/* 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);	874	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		875
589	if (cctx->sptr == (void *)-1)	876	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	877	{
594
595	# if STACKGUARD	878	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	879	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	880	# endif
		881	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		882	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		883	cctx->flags |= CC_MAPPED;
		884	}
		885	else
		886	#endif
		887	{
		888	cctx->ssize = coro_stacksize * (long)sizeof (long);
		889	New (0, cctx->sptr, coro_stacksize, long);
598		890
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	891	if (!cctx->sptr)
605	{	892	{
606	perror ("FATAL: unable to malloc stack for coroutine");	893	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	894	_exit (EXIT_FAILURE);
608	}	895	}
609		896
610	#endif	897	stack_start = cctx->sptr;
		898	stack_size = cctx->ssize;
		899	}
611		900
612	#if USE_VALGRIND	901	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);	902	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
620		903
621	return cctx;	904	return cctx;
622	}	905	}
623		906
624	static void	907	static void
…		…
627	if (!cctx)	910	if (!cctx)
628	return;	911	return;
629		912
630	--cctx_count;	913	--cctx_count;
631		914
632	#if USE_VALGRIND	915	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	916	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	917	#endif
635		918
636	#if HAVE_MMAP	919	#if HAVE_MMAP
		920	if (cctx->flags & CC_MAPPED)
637	munmap (cctx->sptr, cctx->ssize);	921	munmap (cctx->sptr, cctx->ssize);
638	#else	922	else
		923	#endif
639	Safefree (cctx->sptr);	924	Safefree (cctx->sptr);
640	#endif
641		925
642	Safefree (cctx);	926	Safefree (cctx);
643	}	927	}
644		928
645	static coro_cctx *	929	static coro_cctx *
646	cctx_get ()	930	cctx_get (pTHX)
647	{	931	{
648	coro_cctx *cctx;
649
650	if (cctx_first)	932	while (cctx_first)
651	{	933	{
652	cctx = cctx_first;	934	coro_cctx *cctx = cctx_first;
653	cctx_first = cctx->next;	935	cctx_first = cctx->next;
654	--cctx_idle;	936	--cctx_idle;
655	}	937
656	else	938	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
657	{	939	return cctx;
658	cctx = cctx_new ();	940
659	PL_op = PL_op->op_next;	941	cctx_destroy (cctx);
660	}	942	}
661		943
662	return cctx;	944	return cctx_new ();
663	}	945	}
664		946
665	static void	947	static void
666	cctx_put (coro_cctx *cctx)	948	cctx_put (coro_cctx *cctx)
667	{	949	{
…		…
670	{	952	{
671	coro_cctx *first = cctx_first;	953	coro_cctx *first = cctx_first;
672	cctx_first = first->next;	954	cctx_first = first->next;
673	--cctx_idle;	955	--cctx_idle;
674		956
675	assert (!first->inuse);
676	cctx_destroy (first);	957	cctx_destroy (first);
677	}	958	}
678		959
679	++cctx_idle;	960	++cctx_idle;
680	cctx->next = cctx_first;	961	cctx->next = cctx_first;
681	cctx_first = cctx;	962	cctx_first = cctx;
682	}	963	}
683		964
684	/* never call directly, always through the coro_state_transfer global variable */	965	/** coroutine switching *****************************************************/
		966
685	static void NOINLINE	967	static void NOINLINE
		968	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		969	{
		970	if (prev != next)
		971	{
		972	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		973	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		974
		975	if (next->flags & CF_RUNNING)
		976	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		977
		978	if (next->flags & CF_DESTROYED)
		979	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		980
		981	if (PL_lex_state != LEX_NOTPARSING)
		982	croak ("Coro::State::transfer called while parsing, but this is not supported");
		983	}
		984	}
		985
		986	/* always use the TRANSFER macro */
		987	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	988	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	989	{
688	dSTACKLEVEL;	990	dSTACKLEVEL;
689		991
690	/* sometimes transfer is only called to set idle_sp */	992	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	993	if (!next)
		994	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	995	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		996	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		997	}
693	else if (prev != next)	998	else if (prev != next)
694	{	999	{
695	coro_cctx *prev__cctx;	1000	coro_cctx *prev__cctx;
696		1001
697	if (prev->flags & CF_NEW)	1002	if (prev->flags & CF_NEW)
698	{	1003	{
699	/* create a new empty context */	1004	/* create a new empty context */
700	Newz (0, prev->cctx, 1, coro_cctx);	1005	Newz (0, prev->cctx, 1, coro_cctx);
701	prev->cctx->inuse = 1;
702	prev->flags &= ~CF_NEW;	1006	prev->flags &= ~CF_NEW;
703	prev->flags |= CF_RUNNING;	1007	prev->flags |= CF_RUNNING;
704	}	1008	}
705		1009
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
713	prev->flags &= ~CF_RUNNING;	1010	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	1011	next->flags |= CF_RUNNING;
715		1012
716	LOCK;	1013	LOCK;
717		1014
718	if (next->mainstack)	1015	if (next->flags & CF_NEW)
719	{	1016	{
720	/* coroutine already started */	1017	/* need to start coroutine */
721	SAVE (prev, flags);	1018	next->flags &= ~CF_NEW;
722	LOAD (next);	1019	/* first get rid of the old state */
		1020	save_perl (aTHX_ prev);
		1021	/* setup coroutine call */
		1022	setup_coro (aTHX_ next);
723	}	1023	}
724	else	1024	else
725	{	1025	{
726	/* need to start coroutine */	1026	/* coroutine already started */
727	assert (next->flags & CF_NEW);	1027	save_perl (aTHX_ prev);
728	next->flags &= ~CF_NEW;	1028	load_perl (aTHX_ next);
729	/* first get rid of the old state */
730	SAVE (prev, -1);
731	/* setup coroutine call */
732	setup_coro (next);
733	/* need a new stack */
734	assert (!next->stack);
735	}	1029	}
736		1030
737	prev__cctx = prev->cctx;	1031	prev__cctx = prev->cctx;
738		1032
739	/* possibly "free" the cctx */	1033	/* possibly "free" the cctx */
740	if (prev__cctx->idle_sp == STACKLEVEL && 0)	1034	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
741	{	1035	{
742	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1036	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
743	assert (PL_top_env == prev__cctx->top_env);	1037	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
744		1038
745	prev->cctx = 0;	1039	prev->cctx = 0;
746		1040
747	cctx_put (prev__cctx);	1041	cctx_put (prev__cctx);
748	prev__cctx->inuse = 0;
749	}	1042	}
750		1043
		1044	++next->usecount;
		1045
751	if (!next->cctx)	1046	if (!next->cctx)
752	{
753	next->cctx = cctx_get ();	1047	next->cctx = cctx_get (aTHX);
754	assert (!next->cctx->inuse);
755	next->cctx->inuse = 1;
756	}
757		1048
758	if (prev__cctx != next->cctx)	1049	if (prev__cctx != next->cctx)
759	{	1050	{
760	prev__cctx->top_env = PL_top_env;	1051	prev__cctx->top_env = PL_top_env;
761	PL_top_env = next->cctx->top_env;	1052	PL_top_env = next->cctx->top_env;
762	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1053	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
763	}	1054	}
764		1055
765	free_coro_mortal ();	1056	free_coro_mortal (aTHX);
766
767	UNLOCK;	1057	UNLOCK;
768	}	1058	}
769	}	1059	}
770		1060
771	struct transfer_args	1061	struct transfer_args
772	{	1062	{
773	struct coro *prev, *next;	1063	struct coro *prev, *next;
774	int flags;
775	};	1064	};
776		1065
777	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1066	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1067	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
778		1068
		1069	/** high level stuff ********************************************************/
		1070
779	static void	1071	static int
780	coro_state_destroy (struct coro *coro)	1072	coro_state_destroy (pTHX_ struct coro *coro)
781	{	1073	{
782	if (coro->refcnt--)	1074	if (coro->flags & CF_DESTROYED)
783	return;	1075	return 0;
		1076
		1077	coro->flags |= CF_DESTROYED;
		1078
		1079	if (coro->flags & CF_READY)
		1080	{
		1081	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1082	/* alternative: look through all ready queues and remove the coro */
		1083	LOCK;
		1084	--coro_nready;
		1085	UNLOCK;
		1086	}
		1087	else
		1088	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
784		1089
785	if (coro->mainstack && coro->mainstack != main_mainstack)	1090	if (coro->mainstack && coro->mainstack != main_mainstack)
786	{	1091	{
787	struct coro temp;	1092	struct coro temp;
788		1093
789	if (coro->flags & CF_RUNNING)	1094	if (coro->flags & CF_RUNNING)
790	croak ("FATAL: tried to destroy currently running coroutine");	1095	croak ("FATAL: tried to destroy currently running coroutine");
791		1096
792	SAVE ((&temp), TRANSFER_SAVE_ALL);	1097	save_perl (aTHX_ &temp);
793	LOAD (coro);	1098	load_perl (aTHX_ coro);
794		1099
795	coro_destroy_stacks ();	1100	destroy_coro (aTHX_ coro);
796		1101
797	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1102	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
798		1103
799	coro->mainstack = 0;	1104	coro->mainstack = 0;
800	}	1105	}
801		1106
802	cctx_destroy (coro->cctx);	1107	cctx_destroy (coro->cctx);
803	SvREFCNT_dec (coro->args);	1108	SvREFCNT_dec (coro->args);
804	Safefree (coro);	1109
		1110	if (coro->next) coro->next->prev = coro->prev;
		1111	if (coro->prev) coro->prev->next = coro->next;
		1112	if (coro == coro_first) coro_first = coro->next;
		1113
		1114	return 1;
805	}	1115	}
806		1116
807	static int	1117	static int
808	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1118	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809	{	1119	{
810	struct coro *coro = (struct coro *)mg->mg_ptr;	1120	struct coro *coro = (struct coro *)mg->mg_ptr;
811	mg->mg_ptr = 0;	1121	mg->mg_ptr = 0;
812		1122
		1123	coro->hv = 0;
		1124
		1125	if (--coro->refcnt < 0)
		1126	{
813	coro_state_destroy (coro);	1127	coro_state_destroy (aTHX_ coro);
		1128	Safefree (coro);
		1129	}
814		1130
815	return 0;	1131	return 0;
816	}	1132	}
817		1133
818	static int	1134	static int
…		…
825	return 0;	1141	return 0;
826	}	1142	}
827		1143
828	static MGVTBL coro_state_vtbl = {	1144	static MGVTBL coro_state_vtbl = {
829	0, 0, 0, 0,	1145	0, 0, 0, 0,
830	coro_state_clear,	1146	coro_state_free,
831	0,	1147	0,
832	#ifdef MGf_DUP	1148	#ifdef MGf_DUP
833	coro_state_dup,	1149	coro_state_dup,
834	#else	1150	#else
835	# define MGf_DUP 0	1151	# define MGf_DUP 0
836	#endif	1152	#endif
837	};	1153	};
838		1154
839	static struct coro *
840	SvSTATE (SV *coro)
841	{
842	HV *stash;
843	MAGIC *mg;
844
845	if (SvROK (coro))
846	coro = SvRV (coro);
847
848	stash = SvSTASH (coro);
849	if (stash != coro_stash && stash != coro_state_stash)
850	{
851	/* very slow, but rare, check */
852	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
853	croak ("Coro::State object required");
854	}
855
856	mg = SvMAGIC (coro);
857	assert (mg->mg_type == PERL_MAGIC_ext);
858	return (struct coro *)mg->mg_ptr;
859	}
860
861	static void	1155	static void
862	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1156	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
863	{	1157	{
864	ta->prev = SvSTATE (prev);	1158	ta->prev = SvSTATE (prev_sv);
865	ta->next = SvSTATE (next);	1159	ta->next = SvSTATE (next_sv);
866	ta->flags = flags;	1160	TRANSFER_CHECK (*ta);
867	}	1161	}
868		1162
869	static void	1163	static void
870	api_transfer (SV *prev, SV *next, int flags)	1164	api_transfer (SV *prev_sv, SV *next_sv)
871	{	1165	{
		1166	dTHX;
872	struct transfer_args ta;	1167	struct transfer_args ta;
873		1168
874	prepare_transfer (&ta, prev, next, flags);	1169	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
875	TRANSFER (ta);	1170	TRANSFER (ta);
876	}	1171	}
877		1172
878	/** Coro ********************************************************************/	1173	/** Coro ********************************************************************/
879		1174
880	#define PRIO_MAX 3
881	#define PRIO_HIGH 1
882	#define PRIO_NORMAL 0
883	#define PRIO_LOW -1
884	#define PRIO_IDLE -3
885	#define PRIO_MIN -4
886
887	/* for Coro.pm */
888	static SV *coro_current;
889	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
890	static int coro_nready;
891
892	static void	1175	static void
893	coro_enq (SV *coro_sv)	1176	coro_enq (pTHX_ SV *coro_sv)
894	{	1177	{
895	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1178	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;
897	}	1179	}
898		1180
899	static SV *	1181	static SV *
900	coro_deq (int min_prio)	1182	coro_deq (pTHX_ int min_prio)
901	{	1183	{
902	int prio = PRIO_MAX - PRIO_MIN;	1184	int prio = PRIO_MAX - PRIO_MIN;
903		1185
904	min_prio -= PRIO_MIN;	1186	min_prio -= PRIO_MIN;
905	if (min_prio < 0)	1187	if (min_prio < 0)
906	min_prio = 0;	1188	min_prio = 0;
907		1189
908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1190	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909	if (AvFILLp (coro_ready [prio]) >= 0)	1191	if (AvFILLp (coro_ready [prio]) >= 0)
910	{
911	coro_nready--;
912	return av_shift (coro_ready [prio]);	1192	return av_shift (coro_ready [prio]);
913	}
914		1193
915	return 0;	1194	return 0;
916	}	1195	}
917		1196
918	static int	1197	static int
919	api_ready (SV *coro_sv)	1198	api_ready (SV *coro_sv)
920	{	1199	{
		1200	dTHX;
921	struct coro *coro;	1201	struct coro *coro;
922		1202
923	if (SvROK (coro_sv))	1203	if (SvROK (coro_sv))
924	coro_sv = SvRV (coro_sv);	1204	coro_sv = SvRV (coro_sv);
925		1205
926	coro = SvSTATE (coro_sv);	1206	coro = SvSTATE (coro_sv);
927		1207
928	if (coro->flags & CF_READY)	1208	if (coro->flags & CF_READY)
929	return 0;	1209	return 0;
930		1210
931	#if 0 /* this is actually harmless */
932	if (coro->flags & CF_RUNNING)
933	croak ("Coro::ready called on currently running coroutine");
934	#endif
935
936	coro->flags |= CF_READY;	1211	coro->flags |= CF_READY;
937		1212
938	LOCK;	1213	LOCK;
939	coro_enq (SvREFCNT_inc (coro_sv));	1214	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1215	++coro_nready;
940	UNLOCK;	1216	UNLOCK;
941		1217
942	return 1;	1218	return 1;
943	}	1219	}
944		1220
945	static int	1221	static int
946	api_is_ready (SV *coro_sv)	1222	api_is_ready (SV *coro_sv)
947	{	1223	{
		1224	dTHX;
948	return !!SvSTATE (coro_sv)->flags & CF_READY;	1225	return !!(SvSTATE (coro_sv)->flags & CF_READY);
949	}	1226	}
950		1227
951	static void	1228	static void
952	prepare_schedule (struct transfer_args *ta)	1229	prepare_schedule (pTHX_ struct transfer_args *ta)
953	{	1230	{
954	SV *prev, *next;	1231	SV *prev_sv, *next_sv;
955		1232
956	for (;;)	1233	for (;;)
957	{	1234	{
958	LOCK;	1235	LOCK;
959	next = coro_deq (PRIO_MIN);	1236	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1237
		1238	/* nothing to schedule: call the idle handler */
		1239	if (!next_sv)
		1240	{
		1241	dSP;
		1242	UNLOCK;
		1243
		1244	ENTER;
		1245	SAVETMPS;
		1246
		1247	PUSHMARK (SP);
		1248	PUTBACK;
		1249	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1250
		1251	FREETMPS;
		1252	LEAVE;
		1253	continue;
		1254	}
		1255
		1256	ta->next = SvSTATE (next_sv);
		1257
		1258	/* cannot transfer to destroyed coros, skip and look for next */
		1259	if (ta->next->flags & CF_DESTROYED)
		1260	{
		1261	UNLOCK;
		1262	SvREFCNT_dec (next_sv);
		1263	/* coro_nready is already taken care of by destroy */
		1264	continue;
		1265	}
		1266
		1267	--coro_nready;
960	UNLOCK;	1268	UNLOCK;
961
962	if (next)
963	break;	1269	break;
964
965	{
966	dSP;
967
968	ENTER;
969	SAVETMPS;
970
971	PUSHMARK (SP);
972	PUTBACK;
973	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
974
975	FREETMPS;
976	LEAVE;
977	}	1270	}
978	}
979
980	prev = SvRV (coro_current);
981	SvRV_set (coro_current, next);
982		1271
983	/* free this only after the transfer */	1272	/* free this only after the transfer */
		1273	prev_sv = SvRV (coro_current);
		1274	ta->prev = SvSTATE (prev_sv);
		1275	TRANSFER_CHECK (*ta);
		1276	assert (ta->next->flags & CF_READY);
		1277	ta->next->flags &= ~CF_READY;
		1278	SvRV_set (coro_current, next_sv);
		1279
984	LOCK;	1280	LOCK;
985	free_coro_mortal ();	1281	free_coro_mortal (aTHX);
		1282	coro_mortal = prev_sv;
986	UNLOCK;	1283	UNLOCK;
987	coro_mortal = prev;
988
989	assert (!SvROK(prev));//D
990	assert (!SvROK(next));//D
991
992	ta->prev = SvSTATE (prev);
993	ta->next = SvSTATE (next);
994	ta->flags = TRANSFER_SAVE_ALL;
995
996	assert (ta->flags & CF_READY);
997	ta->next->flags &= ~CF_READY;
998	}	1284	}
999		1285
1000	static void	1286	static void
1001	prepare_cede (struct transfer_args *ta)	1287	prepare_cede (pTHX_ struct transfer_args *ta)
1002	{	1288	{
1003	api_ready (coro_current);	1289	api_ready (coro_current);
1004
1005	prepare_schedule (ta);	1290	prepare_schedule (aTHX_ ta);
		1291	}
		1292
		1293	static int
		1294	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1295	{
		1296	if (coro_nready)
		1297	{
		1298	SV *prev = SvRV (coro_current);
		1299	prepare_schedule (aTHX_ ta);
		1300	api_ready (prev);
		1301	return 1;
		1302	}
		1303	else
		1304	return 0;
1006	}	1305	}
1007		1306
1008	static void	1307	static void
1009	api_schedule (void)	1308	api_schedule (void)
1010	{	1309	{
		1310	dTHX;
1011	struct transfer_args ta;	1311	struct transfer_args ta;
1012		1312
1013	prepare_schedule (&ta);	1313	prepare_schedule (aTHX_ &ta);
1014	TRANSFER (ta);	1314	TRANSFER (ta);
1015	}	1315	}
1016		1316
1017	static void	1317	static int
1018	api_cede (void)	1318	api_cede (void)
1019	{	1319	{
		1320	dTHX;
1020	struct transfer_args ta;	1321	struct transfer_args ta;
1021		1322
1022	prepare_cede (&ta);	1323	prepare_cede (aTHX_ &ta);
		1324
		1325	if (ta.prev != ta.next)
		1326	{
1023	TRANSFER (ta);	1327	TRANSFER (ta);
		1328	return 1;
		1329	}
		1330	else
		1331	return 0;
1024	}	1332	}
1025		1333
		1334	static int
		1335	api_cede_notself (void)
		1336	{
		1337	dTHX;
		1338	struct transfer_args ta;
		1339
		1340	if (prepare_cede_notself (aTHX_ &ta))
		1341	{
		1342	TRANSFER (ta);
		1343	return 1;
		1344	}
		1345	else
		1346	return 0;
		1347	}
		1348
		1349	static void
		1350	api_trace (SV *coro_sv, int flags)
		1351	{
		1352	dTHX;
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354
		1355	if (flags & CC_TRACE)
		1356	{
		1357	if (!coro->cctx)
		1358	coro->cctx = cctx_new ();
		1359	else if (!(coro->cctx->flags & CC_TRACE))
		1360	croak ("cannot enable tracing on coroutine with custom stack");
		1361
		1362	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1363	}
		1364	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1365	{
		1366	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1367
		1368	if (coro->flags & CF_RUNNING)
		1369	PL_runops = RUNOPS_DEFAULT;
		1370	else
		1371	coro->runops = RUNOPS_DEFAULT;
		1372	}
		1373	}
		1374
1026	MODULE = Coro::State PACKAGE = Coro::State	1375	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1027		1376
1028	PROTOTYPES: DISABLE	1377	PROTOTYPES: DISABLE
1029		1378
1030	BOOT:	1379	BOOT:
1031	{	1380	{
1032	#ifdef USE_ITHREADS	1381	#ifdef USE_ITHREADS
1033	MUTEX_INIT (&coro_mutex);	1382	MUTEX_INIT (&coro_mutex);
1034	#endif	1383	#endif
1035	BOOT_PAGESIZE;	1384	BOOT_PAGESIZE;
1036		1385
		1386	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1387
1037	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1388	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1038		1389
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1040	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1041	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1393	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1042		1394
1043	main_mainstack = PL_mainstack;	1395	main_mainstack = PL_mainstack;
		1396	main_top_env = PL_top_env;
		1397
		1398	while (main_top_env->je_prev)
		1399	main_top_env = main_top_env->je_prev;
1044		1400
1045	coroapi.ver = CORO_API_VERSION;	1401	coroapi.ver = CORO_API_VERSION;
1046	coroapi.transfer = api_transfer;	1402	coroapi.transfer = api_transfer;
1047		1403
1048	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1404	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1055	struct coro *coro;	1411	struct coro *coro;
1056	HV *hv;	1412	HV *hv;
1057	int i;	1413	int i;
1058		1414
1059	Newz (0, coro, 1, struct coro);	1415	Newz (0, coro, 1, struct coro);
1060	coro->args = newAV ();	1416	coro->args = newAV ();
1061	coro->flags = CF_NEW;	1417	coro->flags = CF_NEW;
1062		1418
		1419	if (coro_first) coro_first->prev = coro;
		1420	coro->next = coro_first;
		1421	coro_first = coro;
		1422
1063	hv = newHV ();	1423	coro->hv = hv = newHV ();
1064	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1424	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1065	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1425	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1066		1426
1067	for (i = 1; i < items; i++)	1427	for (i = 1; i < items; i++)
1068	av_push (coro->args, newSVsv (ST (i)));	1428	av_push (coro->args, newSVsv (ST (i)));
1069	}	1429	}
1070	OUTPUT:	1430	OUTPUT:
1071	RETVAL	1431	RETVAL
1072		1432
		1433	# these not obviously related functions are all rolled into the same xs
		1434	# function to increase chances that they all will call transfer with the same
		1435	# stack offset
1073	void	1436	void
1074	_set_stacklevel (...)	1437	_set_stacklevel (...)
1075	ALIAS:	1438	ALIAS:
1076	Coro::State::transfer = 1	1439	Coro::State::transfer = 1
1077	Coro::schedule = 2	1440	Coro::schedule = 2
1078	Coro::cede = 3	1441	Coro::cede = 3
1079	Coro::Cont::yield = 4	1442	Coro::cede_notself = 4
1080	CODE:	1443	CODE:
1081	{	1444	{
1082	struct transfer_args ta;	1445	struct transfer_args ta;
1083		1446
1084	switch (ix)	1447	switch (ix)
1085	{	1448	{
1086	case 0:	1449	case 0:
1087	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1450	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1088	ta.next = 0;	1451	ta.next = 0;
1089	ta.flags = TRANSFER_SET_STACKLEVEL;
1090	break;	1452	break;
1091		1453
1092	case 1:	1454	case 1:
1093	if (items != 3)	1455	if (items != 2)
1094	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1456	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1095		1457
1096	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1458	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1097	break;	1459	break;
1098		1460
1099	case 2:	1461	case 2:
1100	prepare_schedule (&ta);	1462	prepare_schedule (aTHX_ &ta);
1101	break;	1463	break;
1102		1464
1103	case 3:	1465	case 3:
1104	prepare_cede (&ta);	1466	prepare_cede (aTHX_ &ta);
1105	break;	1467	break;
1106		1468
1107	case 4:	1469	case 4:
1108	{	1470	if (!prepare_cede_notself (aTHX_ &ta))
1109	SV *yieldstack;	1471	XSRETURN_EMPTY;
1110	SV *sv;
1111	AV *defav = GvAV (PL_defgv);
1112		1472
1113	yieldstack = *hv_fetch (
1114	(HV *)SvRV (coro_current),
1115	"yieldstack", sizeof ("yieldstack") - 1,
1116	0
1117	);
1118
1119	/* set up @_ -- ugly */
1120	av_clear (defav);
1121	av_fill (defav, items - 1);
1122	while (items--)
1123	av_store (defav, items, SvREFCNT_inc (ST(items)));
1124
1125	sv = av_pop ((AV *)SvRV (yieldstack));
1126	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1127	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1128	ta.flags = 0;
1129	SvREFCNT_dec (sv);
1130	}
1131	break;	1473	break;
1132
1133	}	1474	}
1134		1475
		1476	BARRIER;
1135	TRANSFER (ta);	1477	TRANSFER (ta);
1136	}
1137		1478
1138	void	1479	if (GIMME_V != G_VOID && ta.next != ta.prev)
1139	_clone_state_from (SV *dst, SV *src)	1480	XSRETURN_YES;
		1481	}
		1482
		1483	bool
		1484	_destroy (SV *coro_sv)
1140	CODE:	1485	CODE:
1141	{	1486	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1142	struct coro *coro_src = SvSTATE (src);	1487	OUTPUT:
1143		1488	RETVAL
1144	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1145
1146	++coro_src->refcnt;
1147	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1148	}
1149		1489
1150	void	1490	void
1151	_exit (code)	1491	_exit (code)
1152	int code	1492	int code
1153	PROTOTYPE: $	1493	PROTOTYPE: $
1154	CODE:	1494	CODE:
1155	_exit (code);	1495	_exit (code);
1156		1496
1157	int	1497	int
		1498	cctx_stacksize (int new_stacksize = 0)
		1499	CODE:
		1500	RETVAL = coro_stacksize;
		1501	if (new_stacksize)
		1502	coro_stacksize = new_stacksize;
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	int
1158	cctx_count ()	1507	cctx_count ()
1159	CODE:	1508	CODE:
1160	RETVAL = cctx_count;	1509	RETVAL = cctx_count;
1161	OUTPUT:	1510	OUTPUT:
1162	RETVAL	1511	RETVAL
…		…
1166	CODE:	1515	CODE:
1167	RETVAL = cctx_idle;	1516	RETVAL = cctx_idle;
1168	OUTPUT:	1517	OUTPUT:
1169	RETVAL	1518	RETVAL
1170		1519
		1520	void
		1521	list ()
		1522	PPCODE:
		1523	{
		1524	struct coro *coro;
		1525	for (coro = coro_first; coro; coro = coro->next)
		1526	if (coro->hv)
		1527	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1528	}
		1529
		1530	void
		1531	call (Coro::State coro, SV *coderef)
		1532	ALIAS:
		1533	eval = 1
		1534	CODE:
		1535	{
		1536	if (coro->mainstack)
		1537	{
		1538	struct coro temp;
		1539	Zero (&temp, 1, struct coro);
		1540
		1541	if (!(coro->flags & CF_RUNNING))
		1542	{
		1543	save_perl (aTHX_ &temp);
		1544	load_perl (aTHX_ coro);
		1545	}
		1546
		1547	{
		1548	dSP;
		1549	ENTER;
		1550	SAVETMPS;
		1551	PUSHMARK (SP);
		1552	PUTBACK;
		1553	if (ix)
		1554	eval_sv (coderef, 0);
		1555	else
		1556	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1557	SPAGAIN;
		1558	FREETMPS;
		1559	LEAVE;
		1560	PUTBACK;
		1561	}
		1562
		1563	if (!(coro->flags & CF_RUNNING))
		1564	{
		1565	save_perl (aTHX_ coro);
		1566	load_perl (aTHX_ &temp);
		1567	}
		1568	}
		1569	}
		1570
		1571	SV *
		1572	is_ready (Coro::State coro)
		1573	PROTOTYPE: $
		1574	ALIAS:
		1575	is_ready = CF_READY
		1576	is_running = CF_RUNNING
		1577	is_new = CF_NEW
		1578	is_destroyed = CF_DESTROYED
		1579	CODE:
		1580	RETVAL = boolSV (coro->flags & ix);
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	void
		1585	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1586
		1587	SV *
		1588	has_stack (Coro::State coro)
		1589	PROTOTYPE: $
		1590	CODE:
		1591	RETVAL = boolSV (!!coro->cctx);
		1592	OUTPUT:
		1593	RETVAL
		1594
		1595	int
		1596	is_traced (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	IV
		1604	rss (Coro::State coro)
		1605	PROTOTYPE: $
		1606	ALIAS:
		1607	usecount = 1
		1608	CODE:
		1609	switch (ix)
		1610	{
		1611	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1612	case 1: RETVAL = coro->usecount; break;
		1613	}
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617
1171	MODULE = Coro::State PACKAGE = Coro	1618	MODULE = Coro::State PACKAGE = Coro
1172		1619
1173	BOOT:	1620	BOOT:
1174	{	1621	{
1175	int i;	1622	int i;
		1623
		1624	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1625	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1626	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1627
		1628	coro_current = get_sv ("Coro::current", FALSE);
		1629	SvREADONLY_on (coro_current);
1176		1630
1177	coro_stash = gv_stashpv ("Coro", TRUE);	1631	coro_stash = gv_stashpv ("Coro", TRUE);
1178		1632
1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1633	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1634	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1635	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1636	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1637	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1638	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185		1639
1186	coro_current = get_sv ("Coro::current", FALSE);
1187	SvREADONLY_on (coro_current);
1188
1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1640	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190	coro_ready[i] = newAV ();	1641	coro_ready[i] = newAV ();
1191		1642
1192	{	1643	{
1193	SV *sv = perl_get_sv("Coro::API", 1);	1644	SV *sv = perl_get_sv("Coro::API", 1);
1194		1645
1195	coroapi.schedule = api_schedule;	1646	coroapi.schedule = api_schedule;
1196	coroapi.cede = api_cede;	1647	coroapi.cede = api_cede;
		1648	coroapi.cede_notself = api_cede_notself;
1197	coroapi.ready = api_ready;	1649	coroapi.ready = api_ready;
1198	coroapi.is_ready = api_is_ready;	1650	coroapi.is_ready = api_is_ready;
1199	coroapi.nready = &coro_nready;	1651	coroapi.nready = &coro_nready;
1200	coroapi.current = coro_current;	1652	coroapi.current = coro_current;
1201		1653
1202	GCoroAPI = &coroapi;	1654	GCoroAPI = &coroapi;
1203	sv_setiv (sv, (IV)&coroapi);	1655	sv_setiv (sv, (IV)&coroapi);
1204	SvREADONLY_on (sv);	1656	SvREADONLY_on (sv);
1205	}	1657	}
1206	}	1658	}
		1659
		1660	void
		1661	_set_current (SV *current)
		1662	PROTOTYPE: $
		1663	CODE:
		1664	SvREFCNT_dec (SvRV (coro_current));
		1665	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1207		1666
1208	int	1667	int
1209	prio (Coro::State coro, int newprio = 0)	1668	prio (Coro::State coro, int newprio = 0)
1210	ALIAS:	1669	ALIAS:
1211	nice = 1	1670	nice = 1
…		…
1214	RETVAL = coro->prio;	1673	RETVAL = coro->prio;
1215		1674
1216	if (items > 1)	1675	if (items > 1)
1217	{	1676	{
1218	if (ix)	1677	if (ix)
1219	newprio += coro->prio;	1678	newprio = coro->prio - newprio;
1220		1679
1221	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1680	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1222	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1681	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1223		1682
1224	coro->prio = newprio;	1683	coro->prio = newprio;
1225	}	1684	}
1226	}	1685	}
		1686	OUTPUT:
		1687	RETVAL
1227		1688
1228	SV *	1689	SV *
1229	ready (SV *self)	1690	ready (SV *self)
1230	PROTOTYPE: $	1691	PROTOTYPE: $
1231	CODE:	1692	CODE:
1232	RETVAL = boolSV (api_ready (self));	1693	RETVAL = boolSV (api_ready (self));
1233	OUTPUT:	1694	OUTPUT:
1234	RETVAL	1695	RETVAL
1235		1696
1236	SV *
1237	is_ready (SV *self)
1238	PROTOTYPE: $
1239	CODE:
1240	RETVAL = boolSV (api_is_ready (self));
1241	OUTPUT:
1242	RETVAL
1243
1244	int	1697	int
1245	nready (...)	1698	nready (...)
1246	PROTOTYPE:	1699	PROTOTYPE:
1247	CODE:	1700	CODE:
1248	RETVAL = coro_nready;	1701	RETVAL = coro_nready;
1249	OUTPUT:	1702	OUTPUT:
1250	RETVAL	1703	RETVAL
1251		1704
		1705	# for async_pool speedup
1252	void	1706	void
1253	_set_current (SV *current)	1707	_pool_1 (SV *cb)
1254	PROTOTYPE: $
1255	CODE:	1708	CODE:
1256	SvREFCNT_dec (SvRV (coro_current));	1709	{
1257	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1710	int i, len;
		1711	HV *hv = (HV *)SvRV (coro_current);
		1712	AV *defav = GvAV (PL_defgv);
		1713	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1714	AV *invoke_av;
		1715
		1716	if (!invoke)
		1717	croak ("\3terminate\2\n");
		1718
		1719	hv_store (hv, "desc", sizeof ("desc") - 1,
		1720	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1721
		1722	invoke_av = (AV *)SvRV (invoke);
		1723	len = av_len (invoke_av);
		1724
		1725	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1726
		1727	if (len > 0)
		1728	{
		1729	av_fill (defav, len - 1);
		1730	for (i = 0; i < len; ++i)
		1731	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1732	}
		1733
		1734	SvREFCNT_dec (invoke);
		1735	}
		1736
		1737	void
		1738	_pool_2 (SV *cb)
		1739	CODE:
		1740	{
		1741	struct coro *coro = SvSTATE (coro_current);
		1742
		1743	sv_setsv (cb, &PL_sv_undef);
		1744
		1745	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1746	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1747	croak ("\3terminate\2\n");
		1748
		1749	av_clear (GvAV (PL_defgv));
		1750	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1751	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1752
		1753	coro->prio = 0;
		1754
		1755	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1756	api_trace (coro_current, 0);
		1757
		1758	av_push (av_async_pool, newSVsv (coro_current));
		1759	}
		1760
1258		1761
1259	MODULE = Coro::State PACKAGE = Coro::AIO	1762	MODULE = Coro::State PACKAGE = Coro::AIO
1260		1763
1261	SV *	1764	SV *
1262	_get_state ()	1765	_get_state ()
1263	CODE:	1766	CODE:
1264	{	1767	{
1265	struct {	1768	struct io_state *data;
1266	int errorno;
1267	int laststype;
1268	int laststatval;
1269	Stat_t statcache;
1270	} data;
1271		1769
		1770	RETVAL = newSV (sizeof (struct io_state));
		1771	data = (struct io_state *)SvPVX (RETVAL);
		1772	SvCUR_set (RETVAL, sizeof (struct io_state));
		1773	SvPOK_only (RETVAL);
		1774
1272	data.errorno = errno;	1775	data->errorno = errno;
1273	data.laststype = PL_laststype;	1776	data->laststype = PL_laststype;
1274	data.laststatval = PL_laststatval;	1777	data->laststatval = PL_laststatval;
1275	data.statcache = PL_statcache;	1778	data->statcache = PL_statcache;
1276
1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
1278	}	1779	}
1279	OUTPUT:	1780	OUTPUT:
1280	RETVAL	1781	RETVAL
1281		1782
1282	void	1783	void
1283	_set_state (char *data_)	1784	_set_state (char *data_)
1284	PROTOTYPE: $	1785	PROTOTYPE: $
1285	CODE:	1786	CODE:
1286	{	1787	{
1287	struct {	1788	struct io_state *data = (void *)data_;
1288	int errorno;
1289	int laststype;
1290	int laststatval;
1291	Stat_t statcache;
1292	} *data = (void *)data_;
1293		1789
1294	errno = data->errorno;	1790	errno = data->errorno;
1295	PL_laststype = data->laststype;	1791	PL_laststype = data->laststype;
1296	PL_laststatval = data->laststatval;	1792	PL_laststatval = data->laststatval;
1297	PL_statcache = data->statcache;	1793	PL_statcache = data->statcache;
1298	}	1794	}
		1795

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