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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.109 by root, Mon Nov 27 18:45:29 2006 UTC vs.
Revision 1.190 by root, Fri Oct 5 20:39:39 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	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
74	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
76	* 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	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84
		85	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		86	# undef CORO_STACKGUARD
		87	#endif
		88
		89	#ifndef CORO_STACKGUARD
		90	# define CORO_STACKGUARD 0
		91	#endif
		92
		93	/* prefer perl internal functions over our own? */
		94	#ifndef CORO_PREFER_PERL_FUNCTIONS
		95	# define CORO_PREFER_PERL_FUNCTIONS 0
		96	#endif
		97
		98	/* The next macros try to return the current stack pointer, in an as
		99	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	100	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	101	#define STACKLEVEL ((void *)&stacklevel)
79		102
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	103	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		104
82	#if __GNUC__ >= 3	105	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	106	# define attribute(x) __attribute__(x)
		107	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	108	#else
85	# define attribute(x)	109	# define attribute(x)
		110	# define BARRIER
86	#endif	111	#endif
87		112
88	#define NOINLINE attribute ((noinline))	113	#define NOINLINE attribute ((noinline))
89		114
90	#include "CoroAPI.h"	115	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		116
94	#ifdef USE_ITHREADS	117	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	118	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	119	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	120	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	121	#else
99	# define LOCK (void)0	122	# define LOCK (void)0
100	# define UNLOCK (void)0	123	# define UNLOCK (void)0
101	#endif	124	#endif
102		125
		126	/* helper storage struct for Coro::AIO */
		127	struct io_state
		128	{
		129	int errorno;
		130	I32 laststype;
		131	int laststatval;
		132	Stat_t statcache;
		133	};
		134
		135	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	136	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	137	static AV *main_mainstack; /* used to differentiate between $main and others */
		138	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	139	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	140	static SV *coro_mortal; /* will be freed after next transfer */
107		141
		142	static GV *irsgv; /* $/ */
		143	static GV *stdoutgv; /* *STDOUT */
		144
		145	/* async_pool helper stuff */
		146	static SV *sv_pool_rss;
		147	static SV *sv_pool_size;
		148	static AV *av_async_pool;
		149
108	static struct coro_cctx *cctx_first;	150	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	151	static int cctx_count, cctx_idle;
		152
		153	enum {
		154	CC_MAPPED = 0x01,
		155	CC_NOREUSE = 0x02, /* throw this away after tracing */
		156	CC_TRACE = 0x04,
		157	CC_TRACE_SUB = 0x08, /* trace sub calls */
		158	CC_TRACE_LINE = 0x10, /* trace each statement */
		159	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		160	};
110		161
111	/* this is a structure representing a c-level coroutine */	162	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	163	typedef struct coro_cctx {
113	struct coro_cctx *next;	164	struct coro_cctx *next;
114		165
115	/* the stack */	166	/* the stack */
116	void *sptr;	167	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	168	size_t ssize;
118		169
119	/* cpu state */	170	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	171	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		172	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	173	JMPENV *top_env;
122	coro_context cctx;	174	coro_context cctx;
123		175
124	#if USE_VALGRIND	176	#if CORO_USE_VALGRIND
125	int valgrind_id;	177	int valgrind_id;
126	#endif	178	#endif
		179	unsigned char flags;
127	} coro_cctx;	180	} coro_cctx;
		181
		182	enum {
		183	CF_RUNNING = 0x0001, /* coroutine is running */
		184	CF_READY = 0x0002, /* coroutine is ready */
		185	CF_NEW = 0x0004, /* has never been switched to */
		186	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		187	};
128		188
129	/* this is a structure representing a perl-level coroutine */	189	/* this is a structure representing a perl-level coroutine */
130	struct coro {	190	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	191	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	192	coro_cctx *cctx;
133		193
134	/* data associated with this coroutine (initial args) */	194	/* data associated with this coroutine (initial args) */
135	AV *args;	195	AV *args;
136	int refcnt;	196	int refcnt;
		197	int flags; /* CF_ flags */
137		198
138	/* optionally saved, might be zero */	199	/* optionally saved, might be zero */
139	AV *defav;	200	AV *defav; /* @_ */
140	SV *defsv;	201	SV *defsv; /* $_ */
141	SV *errsv;	202	SV *errsv; /* $@ */
		203	SV *deffh; /* default filehandle */
		204	SV *irssv; /* $/ */
		205	SV *irssv_sv; /* real $/ cache */
142		206
143	#define VAR(name,type) type name;	207	#define VAR(name,type) type name;
144	# include "state.h"	208	# include "state.h"
145	#undef VAR	209	#undef VAR
146		210
		211	/* statistics */
		212	int usecount; /* number of transfers to this coro */
		213
147	/* coro process data */	214	/* coro process data */
148	int prio;	215	int prio;
		216	//SV *throw;
		217
		218	/* async_pool */
		219	SV *saved_deffh;
		220
		221	/* linked list */
		222	struct coro *next, *prev;
		223	HV *hv; /* the perl hash associated with this coro, if any */
149	};	224	};
150		225
151	typedef struct coro *Coro__State;	226	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	227	typedef struct coro *Coro__State_or_hashref;
153		228
		229	/** Coro ********************************************************************/
		230
		231	#define PRIO_MAX 3
		232	#define PRIO_HIGH 1
		233	#define PRIO_NORMAL 0
		234	#define PRIO_LOW -1
		235	#define PRIO_IDLE -3
		236	#define PRIO_MIN -4
		237
		238	/* for Coro.pm */
		239	static SV *coro_current;
		240	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		241	static int coro_nready;
		242	static struct coro *coro_first;
		243
		244	/** lowlevel stuff **********************************************************/
		245
154	static AV *	246	static AV *
155	coro_clone_padlist (CV *cv)	247	coro_clone_padlist (pTHX_ CV *cv)
156	{	248	{
157	AV *padlist = CvPADLIST (cv);	249	AV *padlist = CvPADLIST (cv);
158	AV *newpadlist, *newpad;	250	AV *newpadlist, *newpad;
159		251
160	newpadlist = newAV ();	252	newpadlist = newAV ();
…		…
172		264
173	return newpadlist;	265	return newpadlist;
174	}	266	}
175		267
176	static void	268	static void
177	free_padlist (AV *padlist)	269	free_padlist (pTHX_ AV *padlist)
178	{	270	{
179	/* may be during global destruction */	271	/* may be during global destruction */
180	if (SvREFCNT (padlist))	272	if (SvREFCNT (padlist))
181	{	273	{
182	I32 i = AvFILLp (padlist);	274	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	295	AV *padlist;
204	AV *av = (AV *)mg->mg_obj;	296	AV *av = (AV *)mg->mg_obj;
205		297
206	/* casting is fun. */	298	/* casting is fun. */
207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	299	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208	free_padlist (padlist);	300	free_padlist (aTHX_ padlist);
209		301
210	SvREFCNT_dec (av);	302	SvREFCNT_dec (av);
211		303
212	return 0;	304	return 0;
213	}	305	}
…		…
221	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	313	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
222	? SvMAGIC (cv) \	314	? SvMAGIC (cv) \
223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	315	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
224	: 0	316	: 0
225		317
		318	static struct coro *
		319	SvSTATE_ (pTHX_ SV *coro)
		320	{
		321	HV *stash;
		322	MAGIC *mg;
		323
		324	if (SvROK (coro))
		325	coro = SvRV (coro);
		326
		327	if (SvTYPE (coro) != SVt_PVHV)
		328	croak ("Coro::State object required");
		329
		330	stash = SvSTASH (coro);
		331	if (stash != coro_stash && stash != coro_state_stash)
		332	{
		333	/* very slow, but rare, check */
		334	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		335	croak ("Coro::State object required");
		336	}
		337
		338	mg = CORO_MAGIC (coro);
		339	return (struct coro *)mg->mg_ptr;
		340	}
		341
		342	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		343
226	/* the next two functions merely cache the padlists */	344	/* the next two functions merely cache the padlists */
227	static void	345	static void
228	get_padlist (CV *cv)	346	get_padlist (pTHX_ CV *cv)
229	{	347	{
230	MAGIC *mg = CORO_MAGIC (cv);	348	MAGIC *mg = CORO_MAGIC (cv);
231	AV *av;	349	AV *av;
232		350
233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	351	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	352	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	353	else
236	{	354	{
237	#if 0	355	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this is probably cleaner, but also slower? */	356	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (cv);	357	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	358	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	359	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	360	SvREFCNT_dec (cp);
243	#else	361	#else
244	CvPADLIST (cv) = coro_clone_padlist (cv);	362	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
245	#endif	363	#endif
246	}	364	}
247	}	365	}
248		366
249	static void	367	static void
250	put_padlist (CV *cv)	368	put_padlist (pTHX_ CV *cv)
251	{	369	{
252	MAGIC *mg = CORO_MAGIC (cv);	370	MAGIC *mg = CORO_MAGIC (cv);
253	AV *av;	371	AV *av;
254		372
255	if (!mg)	373	if (!mg)
…		…
266	av_extend (av, AvMAX (av) + 1);	384	av_extend (av, AvMAX (av) + 1);
267		385
268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	386	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	387	}
270		388
271	#define SB do {	389	/** load & save, init *******************************************************/
272	#define SE } while (0)
273		390
274	#define LOAD(state) load_state((state));
275	#define SAVE(state,flags) save_state((state),(flags));
276
277	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
278
279	static void	391	static void
280	load_state(Coro__State c)	392	load_perl (pTHX_ Coro__State c)
281	{	393	{
282	#define VAR(name,type) PL_ ## name = c->name;	394	#define VAR(name,type) PL_ ## name = c->name;
283	# include "state.h"	395	# include "state.h"
284	#undef VAR	396	#undef VAR
285		397
286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	398	GvSV (PL_defgv) = c->defsv;
287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	399	GvAV (PL_defgv) = c->defav;
288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	400	GvSV (PL_errgv) = c->errsv;
		401	GvSV (irsgv) = c->irssv_sv;
289		402
290	{	403	{
291	dSP;	404	dSP;
292	CV *cv;	405	CV *cv;
293		406
294	/* now do the ugly restore mess */	407	/* now do the ugly restore mess */
295	while ((cv = (CV *)POPs))	408	while ((cv = (CV *)POPs))
296	{	409	{
297	put_padlist (cv); /* mark this padlist as available */	410	put_padlist (aTHX_ cv); /* mark this padlist as available */
298	CvDEPTH (cv) = PTR2IV (POPs);	411	CvDEPTH (cv) = PTR2IV (POPs);
299	CvPADLIST (cv) = (AV *)POPs;	412	CvPADLIST (cv) = (AV *)POPs;
300	}	413	}
301		414
302	PUTBACK;	415	PUTBACK;
303	}	416	}
304	}	417	}
305		418
306	static void	419	static void
307	save_state(Coro__State c, int flags)	420	save_perl (pTHX_ Coro__State c)
308	{	421	{
309	{	422	{
310	dSP;	423	dSP;
311	I32 cxix = cxstack_ix;	424	I32 cxix = cxstack_ix;
312	PERL_CONTEXT *ccstk = cxstack;	425	PERL_CONTEXT *ccstk = cxstack;
…		…
315	/*	428	/*
316	* the worst thing you can imagine happens first - we have to save	429	* the worst thing you can imagine happens first - we have to save
317	* (and reinitialize) all cv's in the whole callchain :(	430	* (and reinitialize) all cv's in the whole callchain :(
318	*/	431	*/
319		432
320	PUSHs (Nullsv);	433	XPUSHs (Nullsv);
321	/* this loop was inspired by pp_caller */	434	/* this loop was inspired by pp_caller */
322	for (;;)	435	for (;;)
323	{	436	{
324	while (cxix >= 0)	437	while (cxix >= 0)
325	{	438	{
326	PERL_CONTEXT *cx = &ccstk[cxix--];	439	PERL_CONTEXT *cx = &ccstk[cxix--];
327		440
328	if (CxTYPE(cx) == CXt_SUB)	441	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
329	{	442	{
330	CV *cv = cx->blk_sub.cv;	443	CV *cv = cx->blk_sub.cv;
331		444
332	if (CvDEPTH (cv))	445	if (CvDEPTH (cv))
333	{	446	{
334	EXTEND (SP, 3);	447	EXTEND (SP, 3);
335
336	PUSHs ((SV *)CvPADLIST(cv));	448	PUSHs ((SV *)CvPADLIST (cv));
337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	449	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
338	PUSHs ((SV *)cv);	450	PUSHs ((SV *)cv);
339		451
340	CvDEPTH (cv) = 0;	452	CvDEPTH (cv) = 0;
341	get_padlist (cv);	453	get_padlist (aTHX_ cv);
342	}	454	}
343	}	455	}
344	#ifdef CXt_FORMAT
345	else if (CxTYPE(cx) == CXt_FORMAT)
346	{
347	/* I never used formats, so how should I know how these are implemented? */
348	/* my bold guess is as a simple, plain sub... */
349	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
350	}
351	#endif
352	}	456	}
353		457
354	if (top_si->si_type == PERLSI_MAIN)	458	if (top_si->si_type == PERLSI_MAIN)
355	break;	459	break;
356		460
357	top_si = top_si->si_prev;	461	top_si = top_si->si_prev;
358	ccstk = top_si->si_cxstack;	462	ccstk = top_si->si_cxstack;
359	cxix = top_si->si_cxix;	463	cxix = top_si->si_cxix;
360	}	464	}
361		465
362	PUTBACK;	466	PUTBACK;
363	}	467	}
364		468
365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	469	c->defav = GvAV (PL_defgv);
366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	470	c->defsv = DEFSV;
367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	471	c->errsv = ERRSV;
		472	c->irssv_sv = GvSV (irsgv);
368		473
369	#define VAR(name,type)c->name = PL_ ## name;	474	#define VAR(name,type)c->name = PL_ ## name;
370	# include "state.h"	475	# include "state.h"
371	#undef VAR	476	#undef VAR
372	}	477	}
…		…
375	* allocate various perl stacks. This is an exact copy	480	* allocate various perl stacks. This is an exact copy
376	* of perl.c:init_stacks, except that it uses less memory	481	* of perl.c:init_stacks, except that it uses less memory
377	* on the (sometimes correct) assumption that coroutines do	482	* on the (sometimes correct) assumption that coroutines do
378	* not usually need a lot of stackspace.	483	* not usually need a lot of stackspace.
379	*/	484	*/
		485	#if CORO_PREFER_PERL_FUNCTIONS
		486	# define coro_init_stacks init_stacks
		487	#else
380	static void	488	static void
381	coro_init_stacks ()	489	coro_init_stacks (pTHX)
382	{	490	{
383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	491	PL_curstackinfo = new_stackinfo(64, 6);
384	PL_curstackinfo->si_type = PERLSI_MAIN;	492	PL_curstackinfo->si_type = PERLSI_MAIN;
385	PL_curstack = PL_curstackinfo->si_stack;	493	PL_curstack = PL_curstackinfo->si_stack;
386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	494	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
387		495
388	PL_stack_base = AvARRAY(PL_curstack);	496	PL_stack_base = AvARRAY(PL_curstack);
389	PL_stack_sp = PL_stack_base;	497	PL_stack_sp = PL_stack_base;
390	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	498	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
391		499
392	New(50,PL_tmps_stack,96,SV*);	500	New(50,PL_tmps_stack,64,SV*);
393	PL_tmps_floor = -1;	501	PL_tmps_floor = -1;
394	PL_tmps_ix = -1;	502	PL_tmps_ix = -1;
395	PL_tmps_max = 96;	503	PL_tmps_max = 64;
396		504
397	New(54,PL_markstack,16,I32);	505	New(54,PL_markstack,16,I32);
398	PL_markstack_ptr = PL_markstack;	506	PL_markstack_ptr = PL_markstack;
399	PL_markstack_max = PL_markstack + 16;	507	PL_markstack_max = PL_markstack + 16;
400		508
…		…
404		512
405	New(54,PL_scopestack,16,I32);	513	New(54,PL_scopestack,16,I32);
406	PL_scopestack_ix = 0;	514	PL_scopestack_ix = 0;
407	PL_scopestack_max = 16;	515	PL_scopestack_max = 16;
408		516
409	New(54,PL_savestack,96,ANY);	517	New(54,PL_savestack,64,ANY);
410	PL_savestack_ix = 0;	518	PL_savestack_ix = 0;
411	PL_savestack_max = 96;	519	PL_savestack_max = 64;
412		520
413	#if !PERL_VERSION_ATLEAST (5,9,0)	521	#if !PERL_VERSION_ATLEAST (5,9,0)
414	New(54,PL_retstack,8,OP*);	522	New(54,PL_retstack,4,OP*);
415	PL_retstack_ix = 0;	523	PL_retstack_ix = 0;
416	PL_retstack_max = 8;	524	PL_retstack_max = 4;
417	#endif	525	#endif
418	}	526	}
		527	#endif
419		528
420	/*	529	/*
421	* destroy the stacks, the callchain etc...	530	* destroy the stacks, the callchain etc...
422	*/	531	*/
423	static void	532	static void
424	coro_destroy_stacks ()	533	coro_destroy_stacks (pTHX)
425	{	534	{
426	if (!IN_DESTRUCT)
427	{
428	/* is this ugly, I ask? */
429	LEAVE_SCOPE (0);
430
431	/* sure it is, but more important: is it correct?? :/ */
432	FREETMPS;
433
434	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
435	}
436
437	while (PL_curstackinfo->si_next)	535	while (PL_curstackinfo->si_next)
438	PL_curstackinfo = PL_curstackinfo->si_next;	536	PL_curstackinfo = PL_curstackinfo->si_next;
439		537
440	while (PL_curstackinfo)	538	while (PL_curstackinfo)
441	{	539	{
442	PERL_SI *p = PL_curstackinfo->si_prev;	540	PERL_SI *p = PL_curstackinfo->si_prev;
443		541
444	{ /*D*//*remove*/
445	dSP;
446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
447	PUTBACK; /* possibly superfluous */
448	}
449
450	if (!IN_DESTRUCT)	542	if (!IN_DESTRUCT)
451	{
452	dounwind (-1);/*D*//*remove*/
453	SvREFCNT_dec (PL_curstackinfo->si_stack);	543	SvREFCNT_dec (PL_curstackinfo->si_stack);
454	}
455		544
456	Safefree (PL_curstackinfo->si_cxstack);	545	Safefree (PL_curstackinfo->si_cxstack);
457	Safefree (PL_curstackinfo);	546	Safefree (PL_curstackinfo);
458	PL_curstackinfo = p;	547	PL_curstackinfo = p;
459	}	548	}
…		…
465	#if !PERL_VERSION_ATLEAST (5,9,0)	554	#if !PERL_VERSION_ATLEAST (5,9,0)
466	Safefree (PL_retstack);	555	Safefree (PL_retstack);
467	#endif	556	#endif
468	}	557	}
469		558
470	static void	559	static size_t
471	setup_coro (struct coro *coro)	560	coro_rss (pTHX_ struct coro *coro)
		561	{
		562	size_t rss = sizeof (*coro);
		563
		564	if (coro->mainstack)
		565	{
		566	if (coro->flags & CF_RUNNING)
		567	{
		568	#define VAR(name,type)coro->name = PL_ ## name;
		569	# include "state.h"
		570	#undef VAR
		571	}
		572
		573	rss += sizeof (coro->curstackinfo);
		574	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		575	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		576	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		577	rss += coro->tmps_max * sizeof (SV *);
		578	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		579	rss += coro->scopestack_max * sizeof (I32);
		580	rss += coro->savestack_max * sizeof (ANY);
		581
		582	#if !PERL_VERSION_ATLEAST (5,9,0)
		583	rss += coro->retstack_max * sizeof (OP *);
		584	#endif
		585	}
		586
		587	return rss;
		588	}
		589
		590	/** coroutine stack handling ************************************************/
		591
		592	static void
		593	coro_setup (pTHX_ struct coro *coro)
472	{	594	{
473	/*	595	/*
474	* emulate part of the perl startup here.	596	* emulate part of the perl startup here.
475	*/	597	*/
476
477	coro_init_stacks ();	598	coro_init_stacks (aTHX);
478		599
		600	PL_runops = RUNOPS_DEFAULT;
		601	PL_curcop = &PL_compiling;
		602	PL_in_eval = EVAL_NULL;
479	PL_curcop = 0;	603	PL_comppad = 0;
480	PL_in_eval = 0;
481	PL_curpm = 0;	604	PL_curpm = 0;
		605	PL_localizing = 0;
		606	PL_dirty = 0;
		607	PL_restartop = 0;
		608
		609	GvSV (PL_defgv) = NEWSV (0, 0);
		610	GvAV (PL_defgv) = coro->args; coro->args = 0;
		611	GvSV (PL_errgv) = NEWSV (0, 0);
		612	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		613	PL_rs = newSVsv (GvSV (irsgv));
		614	PL_defoutgv = SvREFCNT_inc (stdoutgv);
482		615
483	{	616	{
484	dSP;	617	dSP;
485	LOGOP myop;	618	LOGOP myop;
486		619
487	/* I have no idea why this is needed, but it is */
488	PUSHMARK (SP);
489
490	SvREFCNT_dec (GvAV (PL_defgv));
491	GvAV (PL_defgv) = coro->args; coro->args = 0;
492
493	Zero (&myop, 1, LOGOP);	620	Zero (&myop, 1, LOGOP);
494	myop.op_next = Nullop;	621	myop.op_next = Nullop;
495	myop.op_flags = OPf_WANT_VOID;	622	myop.op_flags = OPf_WANT_VOID;
496		623
		624	PUSHMARK (SP);
		625	XPUSHs (av_shift (GvAV (PL_defgv)));
		626	PUTBACK;
497	PL_op = (OP *)&myop;	627	PL_op = (OP *)&myop;
498
499	PUSHMARK (SP);
500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
501	PUTBACK;
502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	628	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
503	SPAGAIN;	629	SPAGAIN;
504
505	ENTER; /* necessary e.g. for dounwind */
506	}	630	}
507	}
508		631
		632	ENTER; /* necessary e.g. for dounwind */
		633	}
		634
509	static void	635	static void
		636	coro_destroy (pTHX_ struct coro *coro)
		637	{
		638	if (!IN_DESTRUCT)
		639	{
		640	/* restore all saved variables and stuff */
		641	LEAVE_SCOPE (0);
		642	assert (PL_tmps_floor == -1);
		643
		644	/* free all temporaries */
		645	FREETMPS;
		646	assert (PL_tmps_ix == -1);
		647
		648	/* unwind all extra stacks */
		649	POPSTACK_TO (PL_mainstack);
		650
		651	/* unwind main stack */
		652	dounwind (-1);
		653	}
		654
		655	SvREFCNT_dec (GvSV (PL_defgv));
		656	SvREFCNT_dec (GvAV (PL_defgv));
		657	SvREFCNT_dec (GvSV (PL_errgv));
		658	SvREFCNT_dec (PL_defoutgv);
		659	SvREFCNT_dec (PL_rs);
		660	SvREFCNT_dec (GvSV (irsgv));
		661
		662	SvREFCNT_dec (coro->saved_deffh);
		663	//SvREFCNT_dec (coro->throw);
		664
		665	coro_destroy_stacks (aTHX);
		666	}
		667
		668	static void
510	free_coro_mortal ()	669	free_coro_mortal (pTHX)
511	{	670	{
512	if (coro_mortal)	671	if (coro_mortal)
513	{	672	{
514	SvREFCNT_dec (coro_mortal);	673	SvREFCNT_dec (coro_mortal);
515	coro_mortal = 0;	674	coro_mortal = 0;
516	}	675	}
517	}	676	}
518		677
		678	static int
		679	runops_trace (pTHX)
		680	{
		681	COP *oldcop = 0;
		682	int oldcxix = -2;
		683	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		684	coro_cctx *cctx = coro->cctx;
		685
		686	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		687	{
		688	PERL_ASYNC_CHECK ();
		689
		690	if (cctx->flags & CC_TRACE_ALL)
		691	{
		692	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		693	{
		694	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		695	SV **bot, **top;
		696	AV *av = newAV (); /* return values */
		697	SV **cb;
		698	dSP;
		699
		700	GV *gv = CvGV (cx->blk_sub.cv);
		701	SV *fullname = sv_2mortal (newSV (0));
		702	if (isGV (gv))
		703	gv_efullname3 (fullname, gv, 0);
		704
		705	bot = PL_stack_base + cx->blk_oldsp + 1;
		706	top = cx->blk_gimme == G_ARRAY ? SP + 1
		707	: cx->blk_gimme == G_SCALAR ? bot + 1
		708	: bot;
		709
		710	while (bot < top)
		711	av_push (av, SvREFCNT_inc (*bot++));
		712
		713	PL_runops = RUNOPS_DEFAULT;
		714	ENTER;
		715	SAVETMPS;
		716	EXTEND (SP, 3);
		717	PUSHMARK (SP);
		718	PUSHs (&PL_sv_no);
		719	PUSHs (fullname);
		720	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		721	PUTBACK;
		722	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		723	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		724	SPAGAIN;
		725	FREETMPS;
		726	LEAVE;
		727	PL_runops = runops_trace;
		728	}
		729
		730	if (oldcop != PL_curcop)
		731	{
		732	oldcop = PL_curcop;
		733
		734	if (PL_curcop != &PL_compiling)
		735	{
		736	SV **cb;
		737
		738	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		739	{
		740	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		741
		742	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		743	{
		744	runops_proc_t old_runops = PL_runops;
		745	dSP;
		746	GV *gv = CvGV (cx->blk_sub.cv);
		747	SV *fullname = sv_2mortal (newSV (0));
		748
		749	if (isGV (gv))
		750	gv_efullname3 (fullname, gv, 0);
		751
		752	PL_runops = RUNOPS_DEFAULT;
		753	ENTER;
		754	SAVETMPS;
		755	EXTEND (SP, 3);
		756	PUSHMARK (SP);
		757	PUSHs (&PL_sv_yes);
		758	PUSHs (fullname);
		759	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		760	PUTBACK;
		761	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		762	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		763	SPAGAIN;
		764	FREETMPS;
		765	LEAVE;
		766	PL_runops = runops_trace;
		767	}
		768
		769	oldcxix = cxstack_ix;
		770	}
		771
		772	if (cctx->flags & CC_TRACE_LINE)
		773	{
		774	dSP;
		775
		776	PL_runops = RUNOPS_DEFAULT;
		777	ENTER;
		778	SAVETMPS;
		779	EXTEND (SP, 3);
		780	PL_runops = RUNOPS_DEFAULT;
		781	PUSHMARK (SP);
		782	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		783	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		784	PUTBACK;
		785	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		786	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		787	SPAGAIN;
		788	FREETMPS;
		789	LEAVE;
		790	PL_runops = runops_trace;
		791	}
		792	}
		793	}
		794	}
		795	}
		796
		797	TAINT_NOT;
		798	return 0;
		799	}
		800
		801	/* inject a fake call to Coro::State::_cctx_init into the execution */
		802	/* _cctx_init should be careful, as it could be called at almost any time */
		803	/* during execution of a perl program */
519	static void NOINLINE	804	static void NOINLINE
520	prepare_cctx (coro_cctx *cctx)	805	prepare_cctx (pTHX_ coro_cctx *cctx)
521	{	806	{
522	dSP;	807	dSP;
523	LOGOP myop;	808	LOGOP myop;
524		809
		810	PL_top_env = &PL_start_env;
		811
		812	if (cctx->flags & CC_TRACE)
		813	PL_runops = runops_trace;
		814
525	Zero (&myop, 1, LOGOP);	815	Zero (&myop, 1, LOGOP);
526	myop.op_next = PL_op;	816	myop.op_next = PL_op;
527	myop.op_flags = OPf_WANT_VOID;	817	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
528
529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530		818
531	PUSHMARK (SP);	819	PUSHMARK (SP);
		820	EXTEND (SP, 2);
		821	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	822	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533	PUTBACK;	823	PUTBACK;
		824	PL_op = (OP *)&myop;
534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	825	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535	SPAGAIN;	826	SPAGAIN;
536	}	827	}
537		828
		829	/*
		830	* this is a _very_ stripped down perl interpreter ;)
		831	*/
538	static void	832	static void
539	coro_run (void *arg)	833	coro_run (void *arg)
540	{	834	{
		835	dTHX;
		836
541	/* coro_run is the alternative epilogue of transfer() */	837	/* coro_run is the alternative tail of transfer(), so unlock here. */
542	UNLOCK;	838	UNLOCK;
543		839
		840	/* we now skip the entersub that lead to transfer() */
		841	PL_op = PL_op->op_next;
		842
		843	/* inject a fake subroutine call to cctx_init */
		844	prepare_cctx (aTHX_ (coro_cctx *)arg);
		845
		846	/* somebody or something will hit me for both perl_run and PL_restartop */
		847	PL_restartop = PL_op;
		848	perl_run (PL_curinterp);
		849
544	/*	850	/*
545	* this is a _very_ stripped down perl interpreter ;)	851	* If perl-run returns we assume exit() was being called or the coro
		852	* fell off the end, which seems to be the only valid (non-bug)
		853	* reason for perl_run to return. We try to exit by jumping to the
		854	* bootstrap-time "top" top_env, as we cannot restore the "main"
		855	* coroutine as Coro has no such concept
546	*/	856	*/
547	PL_top_env = &PL_start_env;	857	PL_top_env = main_top_env;
548		858	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
549	/* inject call to cctx_init */
550	prepare_cctx ((coro_cctx *)arg);
551
552	/* somebody will hit me for both perl_run and PL_restartop */
553	perl_run (PL_curinterp);
554
555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
556	abort ();
557	}	859	}
558		860
559	static coro_cctx *	861	static coro_cctx *
560	cctx_new ()	862	cctx_new ()
561	{	863	{
562	coro_cctx *cctx;	864	coro_cctx *cctx;
		865	void *stack_start;
		866	size_t stack_size;
563		867
564	++cctx_count;	868	++cctx_count;
565		869
566	New (0, cctx, 1, coro_cctx);	870	Newz (0, cctx, 1, coro_cctx);
567		871
568	#if HAVE_MMAP	872	#if HAVE_MMAP
569		873
570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	874	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
571	/* mmap suppsedly does allocate-on-write for us */	875	/* mmap supposedly does allocate-on-write for us */
572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	876	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
573		877
574	if (cctx->sptr == (void *)-1)	878	if (cctx->sptr != (void *)-1)
575	{
576	perror ("FATAL: unable to mmap stack for coroutine");
577	_exit (EXIT_FAILURE);
578	}	879	{
579
580	# if STACKGUARD	880	# if CORO_STACKGUARD
581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	881	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
582	# endif	882	# endif
		883	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		884	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		885	cctx->flags |= CC_MAPPED;
		886	}
		887	else
		888	#endif
		889	{
		890	cctx->ssize = coro_stacksize * (long)sizeof (long);
		891	New (0, cctx->sptr, coro_stacksize, long);
583		892
584	#else
585
586	cctx->ssize = STACKSIZE * (long)sizeof (long);
587	New (0, cctx->sptr, STACKSIZE, long);
588
589	if (!cctx->sptr)	893	if (!cctx->sptr)
590	{	894	{
591	perror ("FATAL: unable to malloc stack for coroutine");	895	perror ("FATAL: unable to allocate stack for coroutine");
592	_exit (EXIT_FAILURE);	896	_exit (EXIT_FAILURE);
593	}	897	}
594		898
595	#endif	899	stack_start = cctx->sptr;
		900	stack_size = cctx->ssize;
		901	}
596		902
597	#if USE_VALGRIND	903	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
600	cctx->ssize + (char *)cctx->sptr
601	);
602	#endif
603
604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	904	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
605		905
606	return cctx;	906	return cctx;
607	}	907	}
608		908
609	static void	909	static void
610	cctx_free (coro_cctx *cctx)	910	cctx_destroy (coro_cctx *cctx)
611	{	911	{
612	if (!cctx)	912	if (!cctx)
613	return;	913	return;
614		914
615	--cctx_count;	915	--cctx_count;
616		916
617	#if USE_VALGRIND	917	#if CORO_USE_VALGRIND
618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	918	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619	#endif	919	#endif
620		920
621	#if HAVE_MMAP	921	#if HAVE_MMAP
		922	if (cctx->flags & CC_MAPPED)
622	munmap (cctx->sptr, cctx->ssize);	923	munmap (cctx->sptr, cctx->ssize);
623	#else	924	else
		925	#endif
624	Safefree (cctx->sptr);	926	Safefree (cctx->sptr);
625	#endif
626		927
627	Safefree (cctx);	928	Safefree (cctx);
628	}	929	}
629		930
630	static coro_cctx *	931	static coro_cctx *
631	cctx_get ()	932	cctx_get (pTHX)
632	{	933	{
633	coro_cctx *cctx;
634
635	if (cctx_first)	934	while (cctx_first)
636	{	935	{
		936	coro_cctx *cctx = cctx_first;
		937	cctx_first = cctx->next;
637	--cctx_idle;	938	--cctx_idle;
638	cctx = cctx_first;	939
639	cctx_first = cctx->next;	940	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
640	}	941	return cctx;
641	else	942
642	{	943	cctx_destroy (cctx);
643	cctx = cctx_new ();
644	PL_op = PL_op->op_next;
645	}	944	}
646		945
647	return cctx;	946	return cctx_new ();
648	}	947	}
649		948
650	static void	949	static void
651	cctx_put (coro_cctx *cctx)	950	cctx_put (coro_cctx *cctx)
652	{	951	{
		952	/* free another cctx if overlimit */
		953	if (cctx_idle >= MAX_IDLE_CCTX)
		954	{
		955	coro_cctx *first = cctx_first;
		956	cctx_first = first->next;
		957	--cctx_idle;
		958
		959	cctx_destroy (first);
		960	}
		961
653	++cctx_idle;	962	++cctx_idle;
654	cctx->next = cctx_first;	963	cctx->next = cctx_first;
655	cctx_first = cctx;	964	cctx_first = cctx;
656	}	965	}
657		966
658	/* never call directly, always through the coro_state_transfer global variable */	967	/** coroutine switching *****************************************************/
		968
659	static void NOINLINE	969	static void NOINLINE
		970	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		971	{
		972	if (prev != next)
		973	{
		974	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		975	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		976
		977	if (next->flags & CF_RUNNING)
		978	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		979
		980	if (next->flags & CF_DESTROYED)
		981	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		982
		983	if (PL_lex_state != LEX_NOTPARSING)
		984	croak ("Coro::State::transfer called while parsing, but this is not supported");
		985	}
		986	}
		987
		988	/* always use the TRANSFER macro */
		989	static void NOINLINE
660	transfer (struct coro *prev, struct coro *next, int flags)	990	transfer (pTHX_ struct coro *prev, struct coro *next)
661	{	991	{
662	dSTACKLEVEL;	992	dSTACKLEVEL;
663		993
664	/* sometimes transfer is only called to set idle_sp */	994	/* sometimes transfer is only called to set idle_sp */
665	if (flags == TRANSFER_SET_STACKLEVEL)	995	if (!next)
		996	{
666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	997	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		998	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		999	}
667	else if (prev != next)	1000	else if (prev != next)
668	{	1001	{
669	coro_cctx *prev__cctx;	1002	coro_cctx *prev__cctx;
670		1003
		1004	if (prev->flags & CF_NEW)
		1005	{
		1006	/* create a new empty context */
		1007	Newz (0, prev->cctx, 1, coro_cctx);
		1008	prev->flags &= ~CF_NEW;
		1009	prev->flags |= CF_RUNNING;
		1010	}
		1011
		1012	prev->flags &= ~CF_RUNNING;
		1013	next->flags |= CF_RUNNING;
		1014
671	LOCK;	1015	LOCK;
672		1016
673	if (next->mainstack)	1017	if (next->flags & CF_NEW)
674	{	1018	{
675	/* coroutine already started */	1019	/* need to start coroutine */
676	SAVE (prev, flags);	1020	next->flags &= ~CF_NEW;
677	LOAD (next);	1021	/* first get rid of the old state */
		1022	save_perl (aTHX_ prev);
		1023	/* setup coroutine call */
		1024	coro_setup (aTHX_ next);
678	}	1025	}
679	else	1026	else
680	{	1027	{
681	/* need to start coroutine */	1028	/* coroutine already started */
682	/* first get rid of the old state */	1029	save_perl (aTHX_ prev);
683	SAVE (prev, -1);	1030	load_perl (aTHX_ next);
684	/* setup coroutine call */
685	setup_coro (next);
686	/* need a stack */
687	next->cctx = 0;
688	}	1031	}
689		1032
690	if (!prev->cctx)
691	/* create a new empty context */
692	Newz (0, prev->cctx, 1, coro_cctx);
693
694	prev__cctx = prev->cctx;	1033	prev__cctx = prev->cctx;
695		1034
696	/* possibly "free" the cctx */	1035	/* possibly "free" the cctx */
697	if (prev__cctx->idle_sp == STACKLEVEL)	1036	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
698	{	1037	{
		1038	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1039	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1040
		1041	prev->cctx = 0;
		1042
699	cctx_put (prev__cctx);	1043	cctx_put (prev__cctx);
700	prev->cctx = 0;
701	}	1044	}
702		1045
		1046	++next->usecount;
		1047
703	if (!next->cctx)	1048	if (!next->cctx)
704	next->cctx = cctx_get ();	1049	next->cctx = cctx_get (aTHX);
705		1050
706	if (prev__cctx != next->cctx)	1051	if (prev__cctx != next->cctx)
707	{	1052	{
708	prev__cctx->top_env = PL_top_env;	1053	prev__cctx->top_env = PL_top_env;
709	PL_top_env = next->cctx->top_env;	1054	PL_top_env = next->cctx->top_env;
710	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1055	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
711	}	1056	}
712		1057
713	free_coro_mortal ();	1058	free_coro_mortal (aTHX);
714
715	UNLOCK;	1059	UNLOCK;
716	}	1060	}
717	}	1061	}
718		1062
719	struct transfer_args	1063	struct transfer_args
720	{	1064	{
721	struct coro *prev, *next;	1065	struct coro *prev, *next;
722	int flags;
723	};	1066	};
724		1067
725	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1068	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1069	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
726		1070
		1071	/** high level stuff ********************************************************/
		1072
727	static void	1073	static int
728	coro_state_destroy (struct coro *coro)	1074	coro_state_destroy (pTHX_ struct coro *coro)
729	{	1075	{
730	if (coro->refcnt--)	1076	if (coro->flags & CF_DESTROYED)
731	return;	1077	return 0;
		1078
		1079	coro->flags |= CF_DESTROYED;
		1080
		1081	if (coro->flags & CF_READY)
		1082	{
		1083	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1084	/* alternative: look through all ready queues and remove the coro */
		1085	LOCK;
		1086	--coro_nready;
		1087	UNLOCK;
		1088	}
		1089	else
		1090	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
732		1091
733	if (coro->mainstack && coro->mainstack != main_mainstack)	1092	if (coro->mainstack && coro->mainstack != main_mainstack)
734	{	1093	{
735	struct coro temp;	1094	struct coro temp;
736		1095
737	SAVE ((&temp), TRANSFER_SAVE_ALL);	1096	if (coro->flags & CF_RUNNING)
738	LOAD (coro);	1097	croak ("FATAL: tried to destroy currently running coroutine");
739		1098
740	coro_destroy_stacks ();	1099	save_perl (aTHX_ &temp);
		1100	load_perl (aTHX_ coro);
741		1101
		1102	coro_destroy (aTHX_ coro);
		1103
742	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1104	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
743		1105
744	coro->mainstack = 0;	1106	coro->mainstack = 0;
745	}	1107	}
746		1108
747	cctx_free (coro->cctx);	1109	cctx_destroy (coro->cctx);
748	SvREFCNT_dec (coro->args);	1110	SvREFCNT_dec (coro->args);
749	Safefree (coro);	1111
		1112	if (coro->next) coro->next->prev = coro->prev;
		1113	if (coro->prev) coro->prev->next = coro->next;
		1114	if (coro == coro_first) coro_first = coro->next;
		1115
		1116	return 1;
750	}	1117	}
751		1118
752	static int	1119	static int
753	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1120	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
754	{	1121	{
755	struct coro *coro = (struct coro *)mg->mg_ptr;	1122	struct coro *coro = (struct coro *)mg->mg_ptr;
756	mg->mg_ptr = 0;	1123	mg->mg_ptr = 0;
757		1124
		1125	coro->hv = 0;
		1126
		1127	if (--coro->refcnt < 0)
		1128	{
758	coro_state_destroy (coro);	1129	coro_state_destroy (aTHX_ coro);
		1130	Safefree (coro);
		1131	}
759		1132
760	return 0;	1133	return 0;
761	}	1134	}
762		1135
763	static int	1136	static int
…		…
770	return 0;	1143	return 0;
771	}	1144	}
772		1145
773	static MGVTBL coro_state_vtbl = {	1146	static MGVTBL coro_state_vtbl = {
774	0, 0, 0, 0,	1147	0, 0, 0, 0,
775	coro_state_clear,	1148	coro_state_free,
776	0,	1149	0,
777	#ifdef MGf_DUP	1150	#ifdef MGf_DUP
778	coro_state_dup,	1151	coro_state_dup,
779	#else	1152	#else
780	# define MGf_DUP 0	1153	# define MGf_DUP 0
781	#endif	1154	#endif
782	};	1155	};
783		1156
784	static struct coro *
785	SvSTATE (SV *coro)
786	{
787	HV *stash;
788	MAGIC *mg;
789
790	if (SvROK (coro))
791	coro = SvRV (coro);
792
793	stash = SvSTASH (coro);
794	if (stash != coro_stash && stash != coro_state_stash)
795	{
796	/* very slow, but rare, check */
797	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
798	croak ("Coro::State object required");
799	}
800
801	mg = SvMAGIC (coro);
802	assert (mg->mg_type == PERL_MAGIC_ext);
803	return (struct coro *)mg->mg_ptr;
804	}
805
806	static void	1157	static void
807	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1158	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
808	{	1159	{
809	ta->prev = SvSTATE (prev);	1160	ta->prev = SvSTATE (prev_sv);
810	ta->next = SvSTATE (next);	1161	ta->next = SvSTATE (next_sv);
811	ta->flags = flags;	1162	TRANSFER_CHECK (*ta);
812	}	1163	}
813		1164
814	static void	1165	static void
815	api_transfer (SV *prev, SV *next, int flags)	1166	api_transfer (SV *prev_sv, SV *next_sv)
816	{	1167	{
817	dTHX;	1168	dTHX;
818	struct transfer_args ta;	1169	struct transfer_args ta;
819		1170
820	prepare_transfer (&ta, prev, next, flags);	1171	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
821	TRANSFER (ta);	1172	TRANSFER (ta);
822	}	1173	}
823		1174
824	/** Coro ********************************************************************/	1175	/** Coro ********************************************************************/
825		1176
826	#define PRIO_MAX 3
827	#define PRIO_HIGH 1
828	#define PRIO_NORMAL 0
829	#define PRIO_LOW -1
830	#define PRIO_IDLE -3
831	#define PRIO_MIN -4
832
833	/* for Coro.pm */
834	static GV *coro_current, *coro_idle;
835	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
836	static int coro_nready;
837
838	static void	1177	static void
839	coro_enq (SV *sv)	1178	coro_enq (pTHX_ SV *coro_sv)
840	{	1179	{
841	int prio;
842
843	if (SvTYPE (sv) != SVt_PVHV)
844	croak ("Coro::ready tried to enqueue something that is not a coroutine");
845
846	prio = SvSTATE (sv)->prio;
847
848	av_push (coro_ready [prio - PRIO_MIN], sv);	1180	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
849	coro_nready++;
850	}	1181	}
851		1182
852	static SV *	1183	static SV *
853	coro_deq (int min_prio)	1184	coro_deq (pTHX_ int min_prio)
854	{	1185	{
855	int prio = PRIO_MAX - PRIO_MIN;	1186	int prio = PRIO_MAX - PRIO_MIN;
856		1187
857	min_prio -= PRIO_MIN;	1188	min_prio -= PRIO_MIN;
858	if (min_prio < 0)	1189	if (min_prio < 0)
859	min_prio = 0;	1190	min_prio = 0;
860		1191
861	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1192	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
862	if (AvFILLp (coro_ready [prio]) >= 0)	1193	if (AvFILLp (coro_ready [prio]) >= 0)
863	{
864	coro_nready--;
865	return av_shift (coro_ready [prio]);	1194	return av_shift (coro_ready [prio]);
866	}
867		1195
868	return 0;	1196	return 0;
869	}	1197	}
870		1198
871	static void	1199	static int
872	api_ready (SV *coro)	1200	api_ready (SV *coro_sv)
873	{	1201	{
874	dTHX;	1202	dTHX;
		1203	struct coro *coro;
875		1204
876	if (SvROK (coro))	1205	if (SvROK (coro_sv))
877	coro = SvRV (coro);	1206	coro_sv = SvRV (coro_sv);
		1207
		1208	coro = SvSTATE (coro_sv);
		1209
		1210	if (coro->flags & CF_READY)
		1211	return 0;
		1212
		1213	coro->flags |= CF_READY;
878		1214
879	LOCK;	1215	LOCK;
880	coro_enq (SvREFCNT_inc (coro));	1216	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1217	++coro_nready;
881	UNLOCK;	1218	UNLOCK;
882	}
883		1219
		1220	return 1;
		1221	}
		1222
884	static void	1223	static int
		1224	api_is_ready (SV *coro_sv)
		1225	{
		1226	dTHX;
		1227	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1228	}
		1229
		1230	static void
885	prepare_schedule (struct transfer_args *ta)	1231	prepare_schedule (pTHX_ struct transfer_args *ta)
886	{	1232	{
887	SV *current, *prev, *next;	1233	SV *prev_sv, *next_sv;
888
889	current = GvSV (coro_current);
890		1234
891	for (;;)	1235	for (;;)
892	{	1236	{
893	LOCK;	1237	LOCK;
894	next = coro_deq (PRIO_MIN);	1238	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1239
		1240	/* nothing to schedule: call the idle handler */
		1241	if (!next_sv)
		1242	{
		1243	dSP;
		1244	UNLOCK;
		1245
		1246	ENTER;
		1247	SAVETMPS;
		1248
		1249	PUSHMARK (SP);
		1250	PUTBACK;
		1251	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1252
		1253	FREETMPS;
		1254	LEAVE;
		1255	continue;
		1256	}
		1257
		1258	ta->next = SvSTATE (next_sv);
		1259
		1260	/* cannot transfer to destroyed coros, skip and look for next */
		1261	if (ta->next->flags & CF_DESTROYED)
		1262	{
		1263	UNLOCK;
		1264	SvREFCNT_dec (next_sv);
		1265	/* coro_nready is already taken care of by destroy */
		1266	continue;
		1267	}
		1268
		1269	--coro_nready;
895	UNLOCK;	1270	UNLOCK;
896
897	if (next)
898	break;	1271	break;
899
900	{
901	dSP;
902
903	ENTER;
904	SAVETMPS;
905
906	PUSHMARK (SP);
907	PUTBACK;
908	call_sv (GvSV (coro_idle), G_DISCARD);
909
910	FREETMPS;
911	LEAVE;
912	}	1272	}
913	}
914
915	prev = SvRV (current);
916	SvRV (current) = next;
917		1273
918	/* free this only after the transfer */	1274	/* free this only after the transfer */
		1275	prev_sv = SvRV (coro_current);
		1276	ta->prev = SvSTATE (prev_sv);
		1277	TRANSFER_CHECK (*ta);
		1278	assert (ta->next->flags & CF_READY);
		1279	ta->next->flags &= ~CF_READY;
		1280	SvRV_set (coro_current, next_sv);
		1281
919	LOCK;	1282	LOCK;
920	free_coro_mortal ();	1283	free_coro_mortal (aTHX);
		1284	coro_mortal = prev_sv;
921	UNLOCK;	1285	UNLOCK;
922	coro_mortal = prev;
923
924	ta->prev = SvSTATE (prev);
925	ta->next = SvSTATE (next);
926	ta->flags = TRANSFER_SAVE_ALL;
927	}	1286	}
928		1287
929	static void	1288	static void
930	prepare_cede (struct transfer_args *ta)	1289	prepare_cede (pTHX_ struct transfer_args *ta)
931	{	1290	{
932	LOCK;	1291	api_ready (coro_current);
933	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
934	UNLOCK;
935
936	prepare_schedule (ta);	1292	prepare_schedule (aTHX_ ta);
		1293	}
		1294
		1295	static int
		1296	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1297	{
		1298	if (coro_nready)
		1299	{
		1300	SV *prev = SvRV (coro_current);
		1301	prepare_schedule (aTHX_ ta);
		1302	api_ready (prev);
		1303	return 1;
		1304	}
		1305	else
		1306	return 0;
937	}	1307	}
938		1308
939	static void	1309	static void
940	api_schedule (void)	1310	api_schedule (void)
941	{	1311	{
942	dTHX;	1312	dTHX;
943	struct transfer_args ta;	1313	struct transfer_args ta;
944		1314
945	prepare_schedule (&ta);	1315	prepare_schedule (aTHX_ &ta);
946	TRANSFER (ta);	1316	TRANSFER (ta);
947	}	1317	}
948		1318
949	static void	1319	static int
950	api_cede (void)	1320	api_cede (void)
951	{	1321	{
952	dTHX;	1322	dTHX;
953	struct transfer_args ta;	1323	struct transfer_args ta;
954		1324
955	prepare_cede (&ta);	1325	prepare_cede (aTHX_ &ta);
		1326
		1327	if (ta.prev != ta.next)
		1328	{
956	TRANSFER (ta);	1329	TRANSFER (ta);
		1330	return 1;
		1331	}
		1332	else
		1333	return 0;
957	}	1334	}
958		1335
		1336	static int
		1337	api_cede_notself (void)
		1338	{
		1339	dTHX;
		1340	struct transfer_args ta;
		1341
		1342	if (prepare_cede_notself (aTHX_ &ta))
		1343	{
		1344	TRANSFER (ta);
		1345	return 1;
		1346	}
		1347	else
		1348	return 0;
		1349	}
		1350
		1351	static void
		1352	api_trace (SV *coro_sv, int flags)
		1353	{
		1354	dTHX;
		1355	struct coro *coro = SvSTATE (coro_sv);
		1356
		1357	if (flags & CC_TRACE)
		1358	{
		1359	if (!coro->cctx)
		1360	coro->cctx = cctx_new ();
		1361	else if (!(coro->cctx->flags & CC_TRACE))
		1362	croak ("cannot enable tracing on coroutine with custom stack");
		1363
		1364	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1365	}
		1366	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1367	{
		1368	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1369
		1370	if (coro->flags & CF_RUNNING)
		1371	PL_runops = RUNOPS_DEFAULT;
		1372	else
		1373	coro->runops = RUNOPS_DEFAULT;
		1374	}
		1375	}
		1376
959	MODULE = Coro::State PACKAGE = Coro::State	1377	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
960		1378
961	PROTOTYPES: DISABLE	1379	PROTOTYPES: DISABLE
962		1380
963	BOOT:	1381	BOOT:
964	{	1382	{
965	#ifdef USE_ITHREADS	1383	#ifdef USE_ITHREADS
966	MUTEX_INIT (&coro_mutex);	1384	MUTEX_INIT (&coro_mutex);
967	#endif	1385	#endif
968	BOOT_PAGESIZE;	1386	BOOT_PAGESIZE;
969		1387
		1388	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1389	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1390
970	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1391	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971		1392
972	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
973	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1394	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
974	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1396	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
975		1397
976	main_mainstack = PL_mainstack;	1398	main_mainstack = PL_mainstack;
		1399	main_top_env = PL_top_env;
		1400
		1401	while (main_top_env->je_prev)
		1402	main_top_env = main_top_env->je_prev;
977		1403
978	coroapi.ver = CORO_API_VERSION;	1404	coroapi.ver = CORO_API_VERSION;
979	coroapi.transfer = api_transfer;	1405	coroapi.transfer = api_transfer;
980		1406
981	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1407	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
988	struct coro *coro;	1414	struct coro *coro;
989	HV *hv;	1415	HV *hv;
990	int i;	1416	int i;
991		1417
992	Newz (0, coro, 1, struct coro);	1418	Newz (0, coro, 1, struct coro);
993	coro->args = newAV ();	1419	coro->args = newAV ();
		1420	coro->flags = CF_NEW;
994		1421
		1422	if (coro_first) coro_first->prev = coro;
		1423	coro->next = coro_first;
		1424	coro_first = coro;
		1425
995	hv = newHV ();	1426	coro->hv = hv = newHV ();
996	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1427	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
997	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1428	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
998		1429
999	for (i = 1; i < items; i++)	1430	for (i = 1; i < items; i++)
1000	av_push (coro->args, newSVsv (ST (i)));	1431	av_push (coro->args, newSVsv (ST (i)));
1001	}	1432	}
1002	OUTPUT:	1433	OUTPUT:
1003	RETVAL	1434	RETVAL
1004		1435
		1436	# these not obviously related functions are all rolled into the same xs
		1437	# function to increase chances that they all will call transfer with the same
		1438	# stack offset
1005	void	1439	void
1006	_set_stacklevel (...)	1440	_set_stacklevel (...)
1007	ALIAS:	1441	ALIAS:
1008	Coro::State::transfer = 1	1442	Coro::State::transfer = 1
1009	Coro::schedule = 2	1443	Coro::schedule = 2
1010	Coro::cede = 3	1444	Coro::cede = 3
1011	Coro::Cont::yield = 4	1445	Coro::cede_notself = 4
1012	CODE:	1446	CODE:
1013	{	1447	{
1014	struct transfer_args ta;	1448	struct transfer_args ta;
1015		1449
1016	switch (ix)	1450	switch (ix)
1017	{	1451	{
1018	case 0:	1452	case 0:
1019	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1453	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1020	ta.next = 0;	1454	ta.next = 0;
1021	ta.flags = TRANSFER_SET_STACKLEVEL;
1022	break;	1455	break;
1023		1456
1024	case 1:	1457	case 1:
1025	if (items != 3)	1458	if (items != 2)
1026	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1459	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1027		1460
1028	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1461	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1029	break;	1462	break;
1030		1463
1031	case 2:	1464	case 2:
1032	prepare_schedule (&ta);	1465	prepare_schedule (aTHX_ &ta);
1033	break;	1466	break;
1034		1467
1035	case 3:	1468	case 3:
1036	prepare_cede (&ta);	1469	prepare_cede (aTHX_ &ta);
1037	break;	1470	break;
1038		1471
1039	case 4:	1472	case 4:
1040	{	1473	if (!prepare_cede_notself (aTHX_ &ta))
1041	SV *yieldstack;	1474	XSRETURN_EMPTY;
1042	SV *sv;
1043	AV *defav = GvAV (PL_defgv);
1044		1475
1045	yieldstack = *hv_fetch (
1046	(HV *)SvRV (GvSV (coro_current)),
1047	"yieldstack", sizeof ("yieldstack") - 1,
1048	0
1049	);
1050
1051	/* set up @_ -- ugly */
1052	av_clear (defav);
1053	av_fill (defav, items - 1);
1054	while (items--)
1055	av_store (defav, items, SvREFCNT_inc (ST(items)));
1056
1057	sv = av_pop ((AV *)SvRV (yieldstack));
1058	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1059	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1060	ta.flags = 0;
1061	SvREFCNT_dec (sv);
1062	}
1063	break;	1476	break;
1064
1065	}	1477	}
1066		1478
		1479	BARRIER;
1067	TRANSFER (ta);	1480	TRANSFER (ta);
1068	}
1069		1481
1070	void	1482	if (GIMME_V != G_VOID && ta.next != ta.prev)
1071	_clone_state_from (SV *dst, SV *src)	1483	XSRETURN_YES;
		1484	}
		1485
		1486	bool
		1487	_destroy (SV *coro_sv)
1072	CODE:	1488	CODE:
1073	{	1489	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1074	struct coro *coro_src = SvSTATE (src);	1490	OUTPUT:
1075		1491	RETVAL
1076	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1077
1078	++coro_src->refcnt;
1079	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1080	}
1081		1492
1082	void	1493	void
1083	_exit (code)	1494	_exit (code)
1084	int code	1495	int code
1085	PROTOTYPE: $	1496	PROTOTYPE: $
1086	CODE:	1497	CODE:
1087	_exit (code);	1498	_exit (code);
1088		1499
1089	int	1500	int
		1501	cctx_stacksize (int new_stacksize = 0)
		1502	CODE:
		1503	RETVAL = coro_stacksize;
		1504	if (new_stacksize)
		1505	coro_stacksize = new_stacksize;
		1506	OUTPUT:
		1507	RETVAL
		1508
		1509	int
1090	cctx_count ()	1510	cctx_count ()
1091	CODE:	1511	CODE:
1092	RETVAL = cctx_count;	1512	RETVAL = cctx_count;
1093	OUTPUT:	1513	OUTPUT:
1094	RETVAL	1514	RETVAL
…		…
1098	CODE:	1518	CODE:
1099	RETVAL = cctx_idle;	1519	RETVAL = cctx_idle;
1100	OUTPUT:	1520	OUTPUT:
1101	RETVAL	1521	RETVAL
1102		1522
		1523	void
		1524	list ()
		1525	PPCODE:
		1526	{
		1527	struct coro *coro;
		1528	for (coro = coro_first; coro; coro = coro->next)
		1529	if (coro->hv)
		1530	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1531	}
		1532
		1533	void
		1534	call (Coro::State coro, SV *coderef)
		1535	ALIAS:
		1536	eval = 1
		1537	CODE:
		1538	{
		1539	if (coro->mainstack)
		1540	{
		1541	struct coro temp;
		1542	Zero (&temp, 1, struct coro);
		1543
		1544	if (!(coro->flags & CF_RUNNING))
		1545	{
		1546	save_perl (aTHX_ &temp);
		1547	load_perl (aTHX_ coro);
		1548	}
		1549
		1550	{
		1551	dSP;
		1552	ENTER;
		1553	SAVETMPS;
		1554	PUSHMARK (SP);
		1555	PUTBACK;
		1556	if (ix)
		1557	eval_sv (coderef, 0);
		1558	else
		1559	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1560	SPAGAIN;
		1561	FREETMPS;
		1562	LEAVE;
		1563	PUTBACK;
		1564	}
		1565
		1566	if (!(coro->flags & CF_RUNNING))
		1567	{
		1568	save_perl (aTHX_ coro);
		1569	load_perl (aTHX_ &temp);
		1570	}
		1571	}
		1572	}
		1573
		1574	SV *
		1575	is_ready (Coro::State coro)
		1576	PROTOTYPE: $
		1577	ALIAS:
		1578	is_ready = CF_READY
		1579	is_running = CF_RUNNING
		1580	is_new = CF_NEW
		1581	is_destroyed = CF_DESTROYED
		1582	CODE:
		1583	RETVAL = boolSV (coro->flags & ix);
		1584	OUTPUT:
		1585	RETVAL
		1586
		1587	void
		1588	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1589
		1590	SV *
		1591	has_stack (Coro::State coro)
		1592	PROTOTYPE: $
		1593	CODE:
		1594	RETVAL = boolSV (!!coro->cctx);
		1595	OUTPUT:
		1596	RETVAL
		1597
		1598	int
		1599	is_traced (Coro::State coro)
		1600	PROTOTYPE: $
		1601	CODE:
		1602	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1603	OUTPUT:
		1604	RETVAL
		1605
		1606	IV
		1607	rss (Coro::State coro)
		1608	PROTOTYPE: $
		1609	ALIAS:
		1610	usecount = 1
		1611	CODE:
		1612	switch (ix)
		1613	{
		1614	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1615	case 1: RETVAL = coro->usecount; break;
		1616	}
		1617	OUTPUT:
		1618	RETVAL
		1619
		1620
1103	MODULE = Coro::State PACKAGE = Coro	1621	MODULE = Coro::State PACKAGE = Coro
1104		1622
1105	BOOT:	1623	BOOT:
1106	{	1624	{
1107	int i;	1625	int i;
		1626
		1627	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1628	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1629	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1630
		1631	coro_current = get_sv ("Coro::current", FALSE);
		1632	SvREADONLY_on (coro_current);
1108		1633
1109	coro_stash = gv_stashpv ("Coro", TRUE);	1634	coro_stash = gv_stashpv ("Coro", TRUE);
1110		1635
1111	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1636	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1112	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1637	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1113	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1638	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1114	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1639	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1115	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1640	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1116	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1641	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1117		1642
1118	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1119	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1120
1121	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1643	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1122	coro_ready[i] = newAV ();	1644	coro_ready[i] = newAV ();
1123		1645
1124	{	1646	{
1125	SV *sv = perl_get_sv("Coro::API", 1);	1647	SV *sv = perl_get_sv("Coro::API", 1);
1126		1648
1127	coroapi.schedule = api_schedule;	1649	coroapi.schedule = api_schedule;
1128	coroapi.cede = api_cede;	1650	coroapi.cede = api_cede;
		1651	coroapi.cede_notself = api_cede_notself;
1129	coroapi.ready = api_ready;	1652	coroapi.ready = api_ready;
		1653	coroapi.is_ready = api_is_ready;
1130	coroapi.nready = &coro_nready;	1654	coroapi.nready = &coro_nready;
1131	coroapi.current = coro_current;	1655	coroapi.current = coro_current;
1132		1656
1133	GCoroAPI = &coroapi;	1657	GCoroAPI = &coroapi;
1134	sv_setiv (sv, (IV)&coroapi);	1658	sv_setiv (sv, (IV)&coroapi);
1135	SvREADONLY_on (sv);	1659	SvREADONLY_on (sv);
1136	}	1660	}
1137	}	1661	}
		1662
		1663	void
		1664	_set_current (SV *current)
		1665	PROTOTYPE: $
		1666	CODE:
		1667	SvREFCNT_dec (SvRV (coro_current));
		1668	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1138		1669
1139	int	1670	int
1140	prio (Coro::State coro, int newprio = 0)	1671	prio (Coro::State coro, int newprio = 0)
1141	ALIAS:	1672	ALIAS:
1142	nice = 1	1673	nice = 1
…		…
1145	RETVAL = coro->prio;	1676	RETVAL = coro->prio;
1146		1677
1147	if (items > 1)	1678	if (items > 1)
1148	{	1679	{
1149	if (ix)	1680	if (ix)
1150	newprio += coro->prio;	1681	newprio = coro->prio - newprio;
1151		1682
1152	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1683	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1153	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1684	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1154		1685
1155	coro->prio = newprio;	1686	coro->prio = newprio;
1156	}	1687	}
1157	}	1688	}
		1689	OUTPUT:
		1690	RETVAL
1158		1691
1159	void	1692	SV *
1160	ready (SV *self)	1693	ready (SV *self)
1161	PROTOTYPE: $	1694	PROTOTYPE: $
1162	CODE:	1695	CODE:
1163	api_ready (self);	1696	RETVAL = boolSV (api_ready (self));
		1697	OUTPUT:
		1698	RETVAL
1164		1699
1165	int	1700	int
1166	nready (...)	1701	nready (...)
1167	PROTOTYPE:	1702	PROTOTYPE:
1168	CODE:	1703	CODE:
1169	RETVAL = coro_nready;	1704	RETVAL = coro_nready;
1170	OUTPUT:	1705	OUTPUT:
1171	RETVAL	1706	RETVAL
1172		1707
		1708	# for async_pool speedup
		1709	void
		1710	_pool_1 (SV *cb)
		1711	CODE:
		1712	{
		1713	struct coro *coro = SvSTATE (coro_current);
		1714	HV *hv = (HV *)SvRV (coro_current);
		1715	AV *defav = GvAV (PL_defgv);
		1716	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1717	AV *invoke_av;
		1718	int i, len;
		1719
		1720	if (!invoke)
		1721	croak ("\3terminate\2\n");
		1722
		1723	SvREFCNT_dec (coro->saved_deffh);
		1724	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1725
		1726	hv_store (hv, "desc", sizeof ("desc") - 1,
		1727	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1728
		1729	invoke_av = (AV *)SvRV (invoke);
		1730	len = av_len (invoke_av);
		1731
		1732	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1733
		1734	if (len > 0)
		1735	{
		1736	av_fill (defav, len - 1);
		1737	for (i = 0; i < len; ++i)
		1738	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1739	}
		1740
		1741	SvREFCNT_dec (invoke);
		1742	}
		1743
		1744	void
		1745	_pool_2 (SV *cb)
		1746	CODE:
		1747	{
		1748	struct coro *coro = SvSTATE (coro_current);
		1749
		1750	sv_setsv (cb, &PL_sv_undef);
		1751
		1752	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1753	coro->saved_deffh = 0;
		1754
		1755	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1756	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1757	croak ("\3terminate\2\n");
		1758
		1759	av_clear (GvAV (PL_defgv));
		1760	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1761	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1762
		1763	coro->prio = 0;
		1764
		1765	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1766	api_trace (coro_current, 0);
		1767
		1768	av_push (av_async_pool, newSVsv (coro_current));
		1769	}
		1770
		1771
1173	MODULE = Coro::State PACKAGE = Coro::AIO	1772	MODULE = Coro::State PACKAGE = Coro::AIO
1174		1773
1175	SV *	1774	SV *
1176	_get_state ()	1775	_get_state ()
1177	CODE:	1776	CODE:
1178	{	1777	{
1179	struct {	1778	struct io_state *data;
1180	int errorno;
1181	int laststype;
1182	int laststatval;
1183	Stat_t statcache;
1184	} data;
1185		1779
		1780	RETVAL = newSV (sizeof (struct io_state));
		1781	data = (struct io_state *)SvPVX (RETVAL);
		1782	SvCUR_set (RETVAL, sizeof (struct io_state));
		1783	SvPOK_only (RETVAL);
		1784
1186	data.errorno = errno;	1785	data->errorno = errno;
1187	data.laststype = PL_laststype;	1786	data->laststype = PL_laststype;
1188	data.laststatval = PL_laststatval;	1787	data->laststatval = PL_laststatval;
1189	data.statcache = PL_statcache;	1788	data->statcache = PL_statcache;
1190
1191	RETVAL = newSVpvn ((char *)&data, sizeof data);
1192	}	1789	}
1193	OUTPUT:	1790	OUTPUT:
1194	RETVAL	1791	RETVAL
1195		1792
1196	void	1793	void
1197	_set_state (char *data_)	1794	_set_state (char *data_)
1198	PROTOTYPE: $	1795	PROTOTYPE: $
1199	CODE:	1796	CODE:
1200	{	1797	{
1201	struct {	1798	struct io_state *data = (void *)data_;
1202	int errorno;
1203	int laststype;
1204	int laststatval;
1205	Stat_t statcache;
1206	} *data = (void *)data_;
1207		1799
1208	errno = data->errorno;	1800	errno = data->errorno;
1209	PL_laststype = data->laststype;	1801	PL_laststype = data->laststype;
1210	PL_laststatval = data->laststatval;	1802	PL_laststatval = data->laststatval;
1211	PL_statcache = data->statcache;	1803	PL_statcache = data->statcache;
1212	}	1804	}
		1805

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