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Comparing Coro/Coro/State.xs (file contents):
Revision 1.125 by root, Mon Dec 11 20:54:45 2006 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	/* 5.8.7 */
44	#ifndef SvRV_set
45	# define SvRV_set(s,v) SvRV(s) = (v)
46	#endif
47
48	#include <stdio.h>	11	#include <stdio.h>
49	#include <errno.h>	12	#include <errno.h>
50	#include <assert.h>	13	#include <assert.h>
51
52	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
53	# undef STACKGUARD
54	#endif
55
56	#ifndef STACKGUARD
57	# define STACKGUARD 0
58	#endif
59		14
60	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
61	# include <unistd.h>	16	# include <unistd.h>
62	# include <sys/mman.h>	17	# include <sys/mman.h>
63	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
78	#else	33	#else
79	# define PAGESIZE 0	34	# define PAGESIZE 0
80	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
81	#endif	36	#endif
82		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		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
83	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
84	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
85	* and should be unique. */	95	* and should be unique. */
86	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
87	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
88		98
89	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
90		100
91	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
92	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
93	#else	104	#else
94	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
95	#endif	107	#endif
96		108
97	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
98		110
99	#include "CoroAPI.h"	111	#include "CoroAPI.h"
…		…
105	#else	117	#else
106	# define LOCK (void)0	118	# define LOCK (void)0
107	# define UNLOCK (void)0	119	# define UNLOCK (void)0
108	#endif	120	#endif
109		121
		122	/* helper storage struct for Coro::AIO */
110	struct io_state	123	struct io_state
111	{	124	{
112	int errorno;	125	int errorno;
113	I32 laststype;	126	I32 laststype;
114	int laststatval;	127	int laststatval;
115	Stat_t statcache;	128	Stat_t statcache;
116	};	129	};
117		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
118	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
119	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
120	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
121	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
122		137
123	static struct coro_cctx *cctx_first;	138	static struct coro_cctx *cctx_first;
124	static int cctx_count, cctx_idle;	139	static int cctx_count, cctx_idle;
…		…
127	typedef struct coro_cctx {	142	typedef struct coro_cctx {
128	struct coro_cctx *next;	143	struct coro_cctx *next;
129		144
130	/* the stack */	145	/* the stack */
131	void *sptr;	146	void *sptr;
132	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
133		148
134	/* cpu state */	149	/* cpu state */
135	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
136	JMPENV *top_env;	152	JMPENV *top_env;
137	coro_context cctx;	153	coro_context cctx;
138		154
139	int inuse;
140
141	#if USE_VALGRIND	155	#if CORO_USE_VALGRIND
142	int valgrind_id;	156	int valgrind_id;
143	#endif	157	#endif
		158	char inuse, mapped;
144	} coro_cctx;	159	} coro_cctx;
145		160
146	enum {	161	enum {
147	CF_RUNNING = 0x0001, /* coroutine is running */	162	CF_RUNNING = 0x0001, /* coroutine is running */
148	CF_READY = 0x0002, /* coroutine is ready */	163	CF_READY = 0x0002, /* coroutine is ready */
149	CF_NEW = 0x0004, /* ahs never been switched to */	164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
150	};	166	};
151		167
152	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
153	struct coro {	169	struct coro {
154	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
…		…
162		178
163	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
164	AV *defav; /* @_ */	180	AV *defav; /* @_ */
165	SV *defsv; /* $_ */	181	SV *defsv; /* $_ */
166	SV *errsv; /* $@ */	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
167	SV *irssv; /* $/ */	184	SV *irssv; /* $/ */
168	SV *irssv_sv; /* real $/ cache */	185	SV *irssv_sv; /* real $/ cache */
169		186
170	#define VAR(name,type) type name;	187	#define VAR(name,type) type name;
171	# include "state.h"	188	# include "state.h"
172	#undef VAR	189	#undef VAR
173		190
174	/* coro process data */	191	/* coro process data */
175	int prio;	192	int prio;
		193
		194	/* linked list */
		195	struct coro *next, *prev;
		196	HV *hv; /* the perl hash associated with this coro, if any */
176	};	197	};
177		198
178	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
179	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
180		201
		202	/** Coro ********************************************************************/
		203
		204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *coro_first;
		216
		217	/** lowlevel stuff **********************************************************/
		218
181	static AV *	219	static AV *
182	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
183	{	221	{
184	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
185	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
186		224
187	newpadlist = newAV ();	225	newpadlist = newAV ();
…		…
199		237
200	return newpadlist;	238	return newpadlist;
201	}	239	}
202		240
203	static void	241	static void
204	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
205	{	243	{
206	/* may be during global destruction */	244	/* may be during global destruction */
207	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
208	{	246	{
209	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
230	AV *padlist;	268	AV *padlist;
231	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
232		270
233	/* casting is fun. */	271	/* casting is fun. */
234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
235	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
236		274
237	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
238		276
239	return 0;	277	return 0;
240	}	278	}
…		…
250	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
251	: 0	289	: 0
252		290
253	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
254	static void	292	static void
255	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
256	{	294	{
257	MAGIC *mg = CORO_MAGIC (cv);	295	MAGIC *mg = CORO_MAGIC (cv);
258	AV *av;	296	AV *av;
259		297
260	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
261	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
262	else	300	else
263	{	301	{
264	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
265	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
266	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
267	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
268	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
269	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
270	#else	308	#else
271	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
272	#endif	310	#endif
273	}	311	}
274	}	312	}
275		313
276	static void	314	static void
277	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
278	{	316	{
279	MAGIC *mg = CORO_MAGIC (cv);	317	MAGIC *mg = CORO_MAGIC (cv);
280	AV *av;	318	AV *av;
281		319
282	if (!mg)	320	if (!mg)
…		…
293	av_extend (av, AvMAX (av) + 1);	331	av_extend (av, AvMAX (av) + 1);
294		332
295	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
296	}	334	}
297		335
		336	/** load & save, init *******************************************************/
		337
298	#define SB do {	338	#define SB do {
299	#define SE } while (0)	339	#define SE } while (0)
300		340
301	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
302		342
303	static void	343	static void
304	load_perl (Coro__State c)	344	load_perl (pTHX_ Coro__State c)
305	{	345	{
306	#define VAR(name,type) PL_ ## name = c->name;	346	#define VAR(name,type) PL_ ## name = c->name;
307	# include "state.h"	347	# include "state.h"
308	#undef VAR	348	#undef VAR
309		349
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
313	if (c->irssv)	355	if (c->irssv)
314	{	356	{
315	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))	357	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		358	{
316	SvREFCNT_dec (c->irssv);	359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
317	else	362	else
318	{	363	{
319	REPLACE_SV (PL_rs, c->irssv);	364	REPLACE_SV (PL_rs, c->irssv);
320	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);	365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
321	sv_setsv (c->irssv_sv, PL_rs);	366	sv_setsv (c->irssv_sv, PL_rs);
…		…
327	CV *cv;	372	CV *cv;
328		373
329	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
330	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
331	{	376	{
332	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
333	CvDEPTH (cv) = PTR2IV (POPs);	378	CvDEPTH (cv) = PTR2IV (POPs);
334	CvPADLIST (cv) = (AV *)POPs;	379	CvPADLIST (cv) = (AV *)POPs;
335	}	380	}
336		381
337	PUTBACK;	382	PUTBACK;
338	}	383	}
339	}	384	}
340		385
341	static void	386	static void
342	save_perl (Coro__State c)	387	save_perl (pTHX_ Coro__State c)
343	{	388	{
344	{	389	{
345	dSP;	390	dSP;
346	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
347	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
350	/*	395	/*
351	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
352	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
353	*/	398	*/
354		399
355	PUSHs (Nullsv);	400	XPUSHs (Nullsv);
356	/* this loop was inspired by pp_caller */	401	/* this loop was inspired by pp_caller */
357	for (;;)	402	for (;;)
358	{	403	{
359	while (cxix >= 0)	404	while (cxix >= 0)
360	{	405	{
361	PERL_CONTEXT *cx = &ccstk[cxix--];	406	PERL_CONTEXT *cx = &ccstk[cxix--];
362		407
363	if (CxTYPE (cx) == CXt_SUB)	408	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
364	{	409	{
365	CV *cv = cx->blk_sub.cv;	410	CV *cv = cx->blk_sub.cv;
366		411
367	if (CvDEPTH (cv))	412	if (CvDEPTH (cv))
368	{	413	{
369	EXTEND (SP, 3);	414	EXTEND (SP, 3);
370
371	PUSHs ((SV *)CvPADLIST (cv));	415	PUSHs ((SV *)CvPADLIST (cv));
372	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	416	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	417	PUSHs ((SV *)cv);
374		418
375	CvDEPTH (cv) = 0;	419	CvDEPTH (cv) = 0;
376	get_padlist (cv);	420	get_padlist (aTHX_ cv);
377	}	421	}
378	}	422	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE (cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	423	}
388		424
389	if (top_si->si_type == PERLSI_MAIN)	425	if (top_si->si_type == PERLSI_MAIN)
390	break;	426	break;
391		427
…		…
398	}	434	}
399		435
400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	436	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	437	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	438	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		439	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
403	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	440	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
404		441
405	#define VAR(name,type)c->name = PL_ ## name;	442	#define VAR(name,type)c->name = PL_ ## name;
406	# include "state.h"	443	# include "state.h"
407	#undef VAR	444	#undef VAR
…		…
411	* allocate various perl stacks. This is an exact copy	448	* allocate various perl stacks. This is an exact copy
412	* of perl.c:init_stacks, except that it uses less memory	449	* of perl.c:init_stacks, except that it uses less memory
413	* on the (sometimes correct) assumption that coroutines do	450	* on the (sometimes correct) assumption that coroutines do
414	* not usually need a lot of stackspace.	451	* not usually need a lot of stackspace.
415	*/	452	*/
		453	#if CORO_PREFER_PERL_FUNCTIONS
		454	# define coro_init_stacks init_stacks
		455	#else
416	static void	456	static void
417	coro_init_stacks ()	457	coro_init_stacks (pTHX)
418	{	458	{
419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	459	PL_curstackinfo = new_stackinfo(64, 6);
420	PL_curstackinfo->si_type = PERLSI_MAIN;	460	PL_curstackinfo->si_type = PERLSI_MAIN;
421	PL_curstack = PL_curstackinfo->si_stack;	461	PL_curstack = PL_curstackinfo->si_stack;
422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	462	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423		463
424	PL_stack_base = AvARRAY(PL_curstack);	464	PL_stack_base = AvARRAY(PL_curstack);
425	PL_stack_sp = PL_stack_base;	465	PL_stack_sp = PL_stack_base;
426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	466	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427		467
428	New(50,PL_tmps_stack,128,SV*);	468	New(50,PL_tmps_stack,64,SV*);
429	PL_tmps_floor = -1;	469	PL_tmps_floor = -1;
430	PL_tmps_ix = -1;	470	PL_tmps_ix = -1;
431	PL_tmps_max = 128;	471	PL_tmps_max = 64;
432		472
433	New(54,PL_markstack,32,I32);	473	New(54,PL_markstack,16,I32);
434	PL_markstack_ptr = PL_markstack;	474	PL_markstack_ptr = PL_markstack;
435	PL_markstack_max = PL_markstack + 32;	475	PL_markstack_max = PL_markstack + 16;
436		476
437	#ifdef SET_MARK_OFFSET	477	#ifdef SET_MARK_OFFSET
438	SET_MARK_OFFSET;	478	SET_MARK_OFFSET;
439	#endif	479	#endif
440		480
441	New(54,PL_scopestack,32,I32);	481	New(54,PL_scopestack,16,I32);
442	PL_scopestack_ix = 0;	482	PL_scopestack_ix = 0;
443	PL_scopestack_max = 32;	483	PL_scopestack_max = 16;
444		484
445	New(54,PL_savestack,64,ANY);	485	New(54,PL_savestack,64,ANY);
446	PL_savestack_ix = 0;	486	PL_savestack_ix = 0;
447	PL_savestack_max = 64;	487	PL_savestack_max = 64;
448		488
449	#if !PERL_VERSION_ATLEAST (5,9,0)	489	#if !PERL_VERSION_ATLEAST (5,9,0)
450	New(54,PL_retstack,16,OP*);	490	New(54,PL_retstack,4,OP*);
451	PL_retstack_ix = 0;	491	PL_retstack_ix = 0;
452	PL_retstack_max = 16;	492	PL_retstack_max = 4;
453	#endif	493	#endif
454	}	494	}
		495	#endif
455		496
456	/*	497	/*
457	* destroy the stacks, the callchain etc...	498	* destroy the stacks, the callchain etc...
458	*/	499	*/
459	static void	500	static void
460	coro_destroy_stacks ()	501	coro_destroy_stacks (pTHX)
461	{	502	{
462	if (!IN_DESTRUCT)	503	if (!IN_DESTRUCT)
463	{	504	{
464	/* is this ugly, I ask? */	505	/* restore all saved variables and stuff */
465	LEAVE_SCOPE (0);	506	LEAVE_SCOPE (0);
		507	assert (PL_tmps_floor == -1);
466		508
467	/* sure it is, but more important: is it correct?? :/ */	509	/* free all temporaries */
468	FREETMPS;	510	FREETMPS;
		511	assert (PL_tmps_ix == -1);
469		512
		513	/* unwind all extra stacks */
470	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	514	POPSTACK_TO (PL_mainstack);
		515
		516	/* unwind main stack */
		517	dounwind (-1);
471	}	518	}
472		519
473	while (PL_curstackinfo->si_next)	520	while (PL_curstackinfo->si_next)
474	PL_curstackinfo = PL_curstackinfo->si_next;	521	PL_curstackinfo = PL_curstackinfo->si_next;
475		522
476	while (PL_curstackinfo)	523	while (PL_curstackinfo)
477	{	524	{
478	PERL_SI *p = PL_curstackinfo->si_prev;	525	PERL_SI *p = PL_curstackinfo->si_prev;
479		526
480	{ /*D*//*remove*/
481	dSP;
482	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
483	PUTBACK; /* possibly superfluous */
484	}
485
486	if (!IN_DESTRUCT)	527	if (!IN_DESTRUCT)
487	{
488	dounwind (-1);/*D*//*remove*/
489	SvREFCNT_dec (PL_curstackinfo->si_stack);	528	SvREFCNT_dec (PL_curstackinfo->si_stack);
490	}
491		529
492	Safefree (PL_curstackinfo->si_cxstack);	530	Safefree (PL_curstackinfo->si_cxstack);
493	Safefree (PL_curstackinfo);	531	Safefree (PL_curstackinfo);
494	PL_curstackinfo = p;	532	PL_curstackinfo = p;
495	}	533	}
…		…
501	#if !PERL_VERSION_ATLEAST (5,9,0)	539	#if !PERL_VERSION_ATLEAST (5,9,0)
502	Safefree (PL_retstack);	540	Safefree (PL_retstack);
503	#endif	541	#endif
504	}	542	}
505		543
		544	static size_t
		545	coro_rss (struct coro *coro)
		546	{
		547	size_t rss = sizeof (coro);
		548
		549	if (coro->mainstack)
		550	{
		551	if (coro->flags & CF_RUNNING)
		552	{
		553	#define VAR(name,type)coro->name = PL_ ## name;
		554	# include "state.h"
		555	#undef VAR
		556	}
		557
		558	rss += sizeof (coro->curstackinfo);
		559	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		560	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		561	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		562	rss += coro->tmps_max * sizeof (SV *);
		563	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		564	rss += coro->scopestack_max * sizeof (I32);
		565	rss += coro->savestack_max * sizeof (ANY);
		566
		567	#if !PERL_VERSION_ATLEAST (5,9,0)
		568	rss += coro->retstack_max * sizeof (OP *);
		569	#endif
		570	}
		571
		572	return rss;
		573	}
		574
		575	/** coroutine stack handling ************************************************/
		576
506	static void	577	static void
507	setup_coro (struct coro *coro)	578	setup_coro (pTHX_ struct coro *coro)
508	{	579	{
509	/*	580	/*
510	* emulate part of the perl startup here.	581	* emulate part of the perl startup here.
511	*/	582	*/
512
513	coro_init_stacks ();	583	coro_init_stacks (aTHX);
514		584
515	PL_curcop = &PL_compiling;	585	PL_curcop = &PL_compiling;
516	PL_in_eval = EVAL_NULL;	586	PL_in_eval = EVAL_NULL;
		587	PL_comppad = 0;
517	PL_curpm = 0;	588	PL_curpm = 0;
518	PL_localizing = 0;	589	PL_localizing = 0;
519	PL_dirty = 0;	590	PL_dirty = 0;
520	PL_restartop = 0;	591	PL_restartop = 0;
521		592
…		…
529	Zero (&myop, 1, LOGOP);	600	Zero (&myop, 1, LOGOP);
530	myop.op_next = Nullop;	601	myop.op_next = Nullop;
531	myop.op_flags = OPf_WANT_VOID;	602	myop.op_flags = OPf_WANT_VOID;
532		603
533	PUSHMARK (SP);	604	PUSHMARK (SP);
534	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	605	XPUSHs (av_shift (GvAV (PL_defgv)));
535	PUTBACK;	606	PUTBACK;
536	PL_op = (OP *)&myop;	607	PL_op = (OP *)&myop;
537	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
538	SPAGAIN;	609	SPAGAIN;
539	}	610	}
540		611
541	ENTER; /* necessary e.g. for dounwind */	612	ENTER; /* necessary e.g. for dounwind */
542	}	613	}
543		614
544	static void	615	static void
545	free_coro_mortal ()	616	free_coro_mortal (pTHX)
546	{	617	{
547	if (coro_mortal)	618	if (coro_mortal)
548	{	619	{
549	SvREFCNT_dec (coro_mortal);	620	SvREFCNT_dec (coro_mortal);
550	coro_mortal = 0;	621	coro_mortal = 0;
551	}	622	}
552	}	623	}
553		624
554	/* inject a fake call to Coro::State::_cctx_init into the execution */	625	/* inject a fake call to Coro::State::_cctx_init into the execution */
		626	/* _cctx_init should be careful, as it could be called at almost any time */
		627	/* during execution of a perl program */
555	static void NOINLINE	628	static void NOINLINE
556	prepare_cctx (coro_cctx *cctx)	629	prepare_cctx (pTHX_ coro_cctx *cctx)
557	{	630	{
558	dSP;	631	dSP;
559	LOGOP myop;	632	LOGOP myop;
560		633
561	Zero (&myop, 1, LOGOP);	634	Zero (&myop, 1, LOGOP);
…		…
570	PL_op = (OP *)&myop;	643	PL_op = (OP *)&myop;
571	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	644	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
572	SPAGAIN;	645	SPAGAIN;
573	}	646	}
574		647
		648	/*
		649	* this is a _very_ stripped down perl interpreter ;)
		650	*/
575	static void	651	static void
576	coro_run (void *arg)	652	coro_run (void *arg)
577	{	653	{
		654	dTHX;
		655
578	/* coro_run is the alternative tail of transfer(), so unlock here. */	656	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	657	UNLOCK;
580		658
581	/*
582	* this is a _very_ stripped down perl interpreter ;)
583	*/
584	PL_top_env = &PL_start_env;	659	PL_top_env = &PL_start_env;
585		660
586	/* inject call to cctx_init */	661	/* inject a fake subroutine call to cctx_init */
587	prepare_cctx ((coro_cctx *)arg);	662	prepare_cctx (aTHX_ (coro_cctx *)arg);
588		663
589	/* somebody will hit me for both perl_run and PL_restartop */	664	/* somebody or something will hit me for both perl_run and PL_restartop */
590	PL_restartop = PL_op;	665	PL_restartop = PL_op;
591	perl_run (PL_curinterp);	666	perl_run (PL_curinterp);
592		667
593	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	668	/*
594	abort ();	669	* If perl-run returns we assume exit() was being called or the coro
		670	* fell off the end, which seems to be the only valid (non-bug)
		671	* reason for perl_run to return. We try to exit by jumping to the
		672	* bootstrap-time "top" top_env, as we cannot restore the "main"
		673	* coroutine as Coro has no such concept
		674	*/
		675	PL_top_env = main_top_env;
		676	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
595	}	677	}
596		678
597	static coro_cctx *	679	static coro_cctx *
598	cctx_new ()	680	cctx_new ()
599	{	681	{
600	coro_cctx *cctx;	682	coro_cctx *cctx;
		683	void *stack_start;
		684	size_t stack_size;
601		685
602	++cctx_count;	686	++cctx_count;
603		687
604	Newz (0, cctx, 1, coro_cctx);	688	Newz (0, cctx, 1, coro_cctx);
605		689
606	#if HAVE_MMAP	690	#if HAVE_MMAP
607		691
608	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	692	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
609	/* mmap supposedly does allocate-on-write for us */	693	/* mmap supposedly does allocate-on-write for us */
610	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	694	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		695
612	if (cctx->sptr == (void *)-1)	696	if (cctx->sptr != (void *)-1)
613	{
614	perror ("FATAL: unable to mmap stack for coroutine");
615	_exit (EXIT_FAILURE);
616	}	697	{
617
618	# if STACKGUARD	698	# if CORO_STACKGUARD
619	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	699	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
620	# endif	700	# endif
		701	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		702	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		703	cctx->mapped = 1;
		704	}
		705	else
		706	#endif
		707	{
		708	cctx->ssize = coro_stacksize * (long)sizeof (long);
		709	New (0, cctx->sptr, coro_stacksize, long);
621		710
622	#else
623
624	cctx->ssize = STACKSIZE * (long)sizeof (long);
625	New (0, cctx->sptr, STACKSIZE, long);
626
627	if (!cctx->sptr)	711	if (!cctx->sptr)
628	{	712	{
629	perror ("FATAL: unable to malloc stack for coroutine");	713	perror ("FATAL: unable to allocate stack for coroutine");
630	_exit (EXIT_FAILURE);	714	_exit (EXIT_FAILURE);
631	}	715	}
632		716
633	#endif	717	stack_start = cctx->sptr;
		718	stack_size = cctx->ssize;
		719	}
634		720
635	#if USE_VALGRIND	721	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
636	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
637	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
638	cctx->ssize + (char *)cctx->sptr
639	);
640	#endif
641
642	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	722	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
643		723
644	return cctx;	724	return cctx;
645	}	725	}
646		726
647	static void	727	static void
…		…
650	if (!cctx)	730	if (!cctx)
651	return;	731	return;
652		732
653	--cctx_count;	733	--cctx_count;
654		734
655	#if USE_VALGRIND	735	#if CORO_USE_VALGRIND
656	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	736	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
657	#endif	737	#endif
658		738
659	#if HAVE_MMAP	739	#if HAVE_MMAP
		740	if (cctx->mapped)
660	munmap (cctx->sptr, cctx->ssize);	741	munmap (cctx->sptr, cctx->ssize);
661	#else	742	else
		743	#endif
662	Safefree (cctx->sptr);	744	Safefree (cctx->sptr);
663	#endif
664		745
665	Safefree (cctx);	746	Safefree (cctx);
666	}	747	}
667		748
668	static coro_cctx *	749	static coro_cctx *
669	cctx_get ()	750	cctx_get (pTHX)
670	{	751	{
671	coro_cctx *cctx;
672
673	if (cctx_first)	752	while (cctx_first)
674	{	753	{
675	cctx = cctx_first;	754	coro_cctx *cctx = cctx_first;
676	cctx_first = cctx->next;	755	cctx_first = cctx->next;
677	--cctx_idle;	756	--cctx_idle;
		757
		758	if (cctx->ssize >= coro_stacksize)
		759	return cctx;
		760
		761	cctx_destroy (cctx);
678	}	762	}
679	else	763
680	{
681	cctx = cctx_new ();
682	PL_op = PL_op->op_next;	764	PL_op = PL_op->op_next;
683	}
684
685	return cctx;	765	return cctx_new ();
686	}	766	}
687		767
688	static void	768	static void
689	cctx_put (coro_cctx *cctx)	769	cctx_put (coro_cctx *cctx)
690	{	770	{
…		…
702	++cctx_idle;	782	++cctx_idle;
703	cctx->next = cctx_first;	783	cctx->next = cctx_first;
704	cctx_first = cctx;	784	cctx_first = cctx;
705	}	785	}
706		786
		787	/** coroutine switching *****************************************************/
		788
707	/* never call directly, always through the coro_state_transfer global variable */	789	/* never call directly, always through the coro_state_transfer global variable */
708	static void NOINLINE	790	static void NOINLINE
709	transfer (struct coro *prev, struct coro *next)	791	transfer (pTHX_ struct coro *prev, struct coro *next)
710	{	792	{
711	dSTACKLEVEL;	793	dSTACKLEVEL;
712		794
713	/* sometimes transfer is only called to set idle_sp */	795	/* sometimes transfer is only called to set idle_sp */
714	if (!next)	796	if (!next)
715	{	797	{
716	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	798	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
717	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */	799	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
718	}	800	}
719	else if (prev != next)	801	else if (prev != next)
720	{	802	{
721	coro_cctx *prev__cctx;	803	coro_cctx *prev__cctx;
722		804
…		…
734	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	816	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
735		817
736	if (next->flags & CF_RUNNING)	818	if (next->flags & CF_RUNNING)
737	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	819	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
738		820
		821	if (next->flags & CF_DESTROYED)
		822	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		823
739	prev->flags &= ~CF_RUNNING;	824	prev->flags &= ~CF_RUNNING;
740	next->flags |= CF_RUNNING;	825	next->flags |= CF_RUNNING;
741		826
742	LOCK;	827	LOCK;
743		828
744	if (next->flags & CF_NEW)	829	if (next->flags & CF_NEW)
745	{	830	{
746	/* need to start coroutine */	831	/* need to start coroutine */
747	next->flags &= ~CF_NEW;	832	next->flags &= ~CF_NEW;
748	/* first get rid of the old state */	833	/* first get rid of the old state */
749	save_perl (prev);	834	save_perl (aTHX_ prev);
750	/* setup coroutine call */	835	/* setup coroutine call */
751	setup_coro (next);	836	setup_coro (aTHX_ next);
752	/* need a new stack */	837	/* need a new stack */
753	assert (!next->cctx);	838	assert (!next->cctx);
754	}	839	}
755	else	840	else
756	{	841	{
757	/* coroutine already started */	842	/* coroutine already started */
758	save_perl (prev);	843	save_perl (aTHX_ prev);
759	load_perl (next);	844	load_perl (aTHX_ next);
760	}	845	}
761		846
762	prev__cctx = prev->cctx;	847	prev__cctx = prev->cctx;
763		848
764	/* possibly "free" the cctx */	849	/* possibly "free" the cctx */
765	if (prev__cctx->idle_sp == STACKLEVEL)	850	if (prev__cctx->idle_sp == STACKLEVEL)
766	{	851	{
767	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	852	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
768	assert (PL_top_env == prev__cctx->top_env);	853	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
769		854
770	prev->cctx = 0;	855	prev->cctx = 0;
771		856
772	cctx_put (prev__cctx);	857	cctx_put (prev__cctx);
773	prev__cctx->inuse = 0;	858	prev__cctx->inuse = 0;
774	}	859	}
775		860
776	if (!next->cctx)	861	if (!next->cctx)
777	{	862	{
778	next->cctx = cctx_get ();	863	next->cctx = cctx_get (aTHX);
779	assert (!next->cctx->inuse);	864	assert (!next->cctx->inuse);
780	next->cctx->inuse = 1;	865	next->cctx->inuse = 1;
781	}	866	}
782		867
783	if (prev__cctx != next->cctx)	868	if (prev__cctx != next->cctx)
…		…
785	prev__cctx->top_env = PL_top_env;	870	prev__cctx->top_env = PL_top_env;
786	PL_top_env = next->cctx->top_env;	871	PL_top_env = next->cctx->top_env;
787	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	872	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
788	}	873	}
789		874
790	free_coro_mortal ();	875	free_coro_mortal (aTHX);
791
792	UNLOCK;	876	UNLOCK;
793	}	877	}
794	}	878	}
795		879
796	struct transfer_args	880	struct transfer_args
797	{	881	{
798	struct coro *prev, *next;	882	struct coro *prev, *next;
799	};	883	};
800		884
801	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	885	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
802		886
		887	/** high level stuff ********************************************************/
		888
803	static void	889	static int
804	coro_state_destroy (struct coro *coro)	890	coro_state_destroy (pTHX_ struct coro *coro)
805	{	891	{
806	if (coro->refcnt--)	892	if (coro->flags & CF_DESTROYED)
807	return;	893	return 0;
		894
		895	coro->flags |= CF_DESTROYED;
		896
		897	if (coro->flags & CF_READY)
		898	{
		899	/* reduce nready, as destroying a ready coro effectively unreadies it */
		900	/* alternative: look through all ready queues and remove the coro */
		901	LOCK;
		902	--coro_nready;
		903	UNLOCK;
		904	}
		905	else
		906	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
808		907
809	if (coro->mainstack && coro->mainstack != main_mainstack)	908	if (coro->mainstack && coro->mainstack != main_mainstack)
810	{	909	{
811	struct coro temp;	910	struct coro temp;
		911
		912	assert (!(coro->flags & CF_RUNNING));
		913
812	Zero (&temp, 1, struct coro);	914	Zero (&temp, 1, struct coro);
813	temp.save = CORO_SAVE_ALL;	915	temp.save = CORO_SAVE_ALL;
814		916
815	if (coro->flags & CF_RUNNING)	917	if (coro->flags & CF_RUNNING)
816	croak ("FATAL: tried to destroy currently running coroutine");	918	croak ("FATAL: tried to destroy currently running coroutine");
817		919
818	save_perl (&temp);	920	save_perl (aTHX_ &temp);
819	load_perl (coro);	921	load_perl (aTHX_ coro);
820		922
821	coro_destroy_stacks ();	923	coro_destroy_stacks (aTHX);
822		924
823	load_perl (&temp); /* this will get rid of defsv etc.. */	925	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
824		926
825	coro->mainstack = 0;	927	coro->mainstack = 0;
826	}	928	}
827		929
828	cctx_destroy (coro->cctx);	930	cctx_destroy (coro->cctx);
829	SvREFCNT_dec (coro->args);	931	SvREFCNT_dec (coro->args);
830	Safefree (coro);	932
		933	if (coro->next) coro->next->prev = coro->prev;
		934	if (coro->prev) coro->prev->next = coro->next;
		935	if (coro == coro_first) coro_first = coro->next;
		936
		937	return 1;
831	}	938	}
832		939
833	static int	940	static int
834	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	941	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
835	{	942	{
836	struct coro *coro = (struct coro *)mg->mg_ptr;	943	struct coro *coro = (struct coro *)mg->mg_ptr;
837	mg->mg_ptr = 0;	944	mg->mg_ptr = 0;
838		945
		946	coro->hv = 0;
		947
		948	if (--coro->refcnt < 0)
		949	{
839	coro_state_destroy (coro);	950	coro_state_destroy (aTHX_ coro);
		951	Safefree (coro);
		952	}
840		953
841	return 0;	954	return 0;
842	}	955	}
843		956
844	static int	957	static int
…		…
851	return 0;	964	return 0;
852	}	965	}
853		966
854	static MGVTBL coro_state_vtbl = {	967	static MGVTBL coro_state_vtbl = {
855	0, 0, 0, 0,	968	0, 0, 0, 0,
856	coro_state_clear,	969	coro_state_free,
857	0,	970	0,
858	#ifdef MGf_DUP	971	#ifdef MGf_DUP
859	coro_state_dup,	972	coro_state_dup,
860	#else	973	#else
861	# define MGf_DUP 0	974	# define MGf_DUP 0
862	#endif	975	#endif
863	};	976	};
864		977
865	static struct coro *	978	static struct coro *
866	SvSTATE (SV *coro)	979	SvSTATE_ (pTHX_ SV *coro)
867	{	980	{
868	HV *stash;	981	HV *stash;
869	MAGIC *mg;	982	MAGIC *mg;
870		983
871	if (SvROK (coro))	984	if (SvROK (coro))
…		…
877	/* very slow, but rare, check */	990	/* very slow, but rare, check */
878	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	991	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
879	croak ("Coro::State object required");	992	croak ("Coro::State object required");
880	}	993	}
881		994
882	mg = SvMAGIC (coro);	995	mg = CORO_MAGIC (coro);
883	assert (mg->mg_type == PERL_MAGIC_ext);
884	return (struct coro *)mg->mg_ptr;	996	return (struct coro *)mg->mg_ptr;
885	}	997	}
886		998
		999	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1000
887	static void	1001	static void
888	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1002	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
889	{	1003	{
890	ta->prev = SvSTATE (prev_sv);	1004	ta->prev = SvSTATE (prev_sv);
891	ta->next = SvSTATE (next_sv);	1005	ta->next = SvSTATE (next_sv);
892	}	1006	}
893		1007
894	static void	1008	static void
895	api_transfer (SV *prev_sv, SV *next_sv)	1009	api_transfer (SV *prev_sv, SV *next_sv)
896	{	1010	{
		1011	dTHX;
897	struct transfer_args ta;	1012	struct transfer_args ta;
898		1013
899	prepare_transfer (&ta, prev_sv, next_sv);	1014	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900	TRANSFER (ta);	1015	TRANSFER (ta);
901	}	1016	}
902		1017
903	static int	1018	static int
904	api_save (SV *coro_sv, int new_save)	1019	api_save (SV *coro_sv, int new_save)
905	{	1020	{
		1021	dTHX;
906	struct coro *coro = SvSTATE (coro_sv);	1022	struct coro *coro = SvSTATE (coro_sv);
907	int old_save = coro->save;	1023	int old_save = coro->save;
908		1024
909	if (new_save >= 0)	1025	if (new_save >= 0)
910	coro->save = new_save;	1026	coro->save = new_save;
…		…
912	return old_save;	1028	return old_save;
913	}	1029	}
914		1030
915	/** Coro ********************************************************************/	1031	/** Coro ********************************************************************/
916		1032
917	#define PRIO_MAX 3
918	#define PRIO_HIGH 1
919	#define PRIO_NORMAL 0
920	#define PRIO_LOW -1
921	#define PRIO_IDLE -3
922	#define PRIO_MIN -4
923
924	/* for Coro.pm */
925	static SV *coro_current;
926	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
927	static int coro_nready;
928
929	static void	1033	static void
930	coro_enq (SV *coro_sv)	1034	coro_enq (pTHX_ SV *coro_sv)
931	{	1035	{
932	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1036	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
933	coro_nready++;
934	}	1037	}
935		1038
936	static SV *	1039	static SV *
937	coro_deq (int min_prio)	1040	coro_deq (pTHX_ int min_prio)
938	{	1041	{
939	int prio = PRIO_MAX - PRIO_MIN;	1042	int prio = PRIO_MAX - PRIO_MIN;
940		1043
941	min_prio -= PRIO_MIN;	1044	min_prio -= PRIO_MIN;
942	if (min_prio < 0)	1045	if (min_prio < 0)
943	min_prio = 0;	1046	min_prio = 0;
944		1047
945	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1048	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
946	if (AvFILLp (coro_ready [prio]) >= 0)	1049	if (AvFILLp (coro_ready [prio]) >= 0)
947	{
948	coro_nready--;
949	return av_shift (coro_ready [prio]);	1050	return av_shift (coro_ready [prio]);
950	}
951		1051
952	return 0;	1052	return 0;
953	}	1053	}
954		1054
955	static int	1055	static int
956	api_ready (SV *coro_sv)	1056	api_ready (SV *coro_sv)
957	{	1057	{
		1058	dTHX;
958	struct coro *coro;	1059	struct coro *coro;
959		1060
960	if (SvROK (coro_sv))	1061	if (SvROK (coro_sv))
961	coro_sv = SvRV (coro_sv);	1062	coro_sv = SvRV (coro_sv);
962		1063
963	coro = SvSTATE (coro_sv);	1064	coro = SvSTATE (coro_sv);
964		1065
965	if (coro->flags & CF_READY)	1066	if (coro->flags & CF_READY)
966	return 0;	1067	return 0;
967		1068
968	#if 0 /* this is actually harmless */
969	if (coro->flags & CF_RUNNING)
970	croak ("Coro::ready called on currently running coroutine");
971	#endif
972
973	coro->flags |= CF_READY;	1069	coro->flags |= CF_READY;
974		1070
975	LOCK;	1071	LOCK;
976	coro_enq (SvREFCNT_inc (coro_sv));	1072	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1073	++coro_nready;
977	UNLOCK;	1074	UNLOCK;
978		1075
979	return 1;	1076	return 1;
980	}	1077	}
981		1078
982	static int	1079	static int
983	api_is_ready (SV *coro_sv)	1080	api_is_ready (SV *coro_sv)
984	{	1081	{
		1082	dTHX;
985	return !!SvSTATE (coro_sv)->flags & CF_READY;	1083	return !!(SvSTATE (coro_sv)->flags & CF_READY);
986	}	1084	}
987		1085
988	static void	1086	static void
989	prepare_schedule (struct transfer_args *ta)	1087	prepare_schedule (pTHX_ struct transfer_args *ta)
990	{	1088	{
991	SV *prev, *next;	1089	SV *prev_sv, *next_sv;
992		1090
993	for (;;)	1091	for (;;)
994	{	1092	{
995	LOCK;	1093	LOCK;
996	next = coro_deq (PRIO_MIN);	1094	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1095
		1096	/* nothing to schedule: call the idle handler */
		1097	if (!next_sv)
		1098	{
		1099	dSP;
		1100	UNLOCK;
		1101
		1102	ENTER;
		1103	SAVETMPS;
		1104
		1105	PUSHMARK (SP);
		1106	PUTBACK;
		1107	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1108
		1109	FREETMPS;
		1110	LEAVE;
		1111	continue;
		1112	}
		1113
		1114	ta->next = SvSTATE (next_sv);
		1115
		1116	/* cannot transfer to destroyed coros, skip and look for next */
		1117	if (ta->next->flags & CF_DESTROYED)
		1118	{
		1119	UNLOCK;
		1120	SvREFCNT_dec (next_sv);
		1121	/* coro_nready is already taken care of by destroy */
		1122	continue;
		1123	}
		1124
		1125	--coro_nready;
997	UNLOCK;	1126	UNLOCK;
998
999	if (next)
1000	break;	1127	break;
1001
1002	{
1003	dSP;
1004
1005	ENTER;
1006	SAVETMPS;
1007
1008	PUSHMARK (SP);
1009	PUTBACK;
1010	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1011
1012	FREETMPS;
1013	LEAVE;
1014	}	1128	}
1015	}
1016
1017	prev = SvRV (coro_current);
1018	SvRV_set (coro_current, next);
1019		1129
1020	/* free this only after the transfer */	1130	/* free this only after the transfer */
1021	LOCK;	1131	prev_sv = SvRV (coro_current);
1022	free_coro_mortal ();	1132	SvRV_set (coro_current, next_sv);
1023	UNLOCK;
1024	coro_mortal = prev;
1025
1026	assert (!SvROK(prev));//D
1027	assert (!SvROK(next));//D
1028
1029	ta->prev = SvSTATE (prev);	1133	ta->prev = SvSTATE (prev_sv);
1030	ta->next = SvSTATE (next);
1031		1134
1032	assert (ta->next->flags & CF_READY);	1135	assert (ta->next->flags & CF_READY);
1033	ta->next->flags &= ~CF_READY;	1136	ta->next->flags &= ~CF_READY;
1034	}
1035		1137
		1138	LOCK;
		1139	free_coro_mortal (aTHX);
		1140	coro_mortal = prev_sv;
		1141	UNLOCK;
		1142	}
		1143
1036	static void	1144	static void
1037	prepare_cede (struct transfer_args *ta)	1145	prepare_cede (pTHX_ struct transfer_args *ta)
1038	{	1146	{
1039	api_ready (coro_current);	1147	api_ready (coro_current);
1040
1041	prepare_schedule (ta);	1148	prepare_schedule (aTHX_ ta);
		1149	}
		1150
		1151	static int
		1152	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1153	{
		1154	if (coro_nready)
		1155	{
		1156	SV *prev = SvRV (coro_current);
		1157	prepare_schedule (aTHX_ ta);
		1158	api_ready (prev);
		1159	return 1;
		1160	}
		1161	else
		1162	return 0;
1042	}	1163	}
1043		1164
1044	static void	1165	static void
1045	api_schedule (void)	1166	api_schedule (void)
1046	{	1167	{
		1168	dTHX;
1047	struct transfer_args ta;	1169	struct transfer_args ta;
1048		1170
1049	prepare_schedule (&ta);	1171	prepare_schedule (aTHX_ &ta);
1050	TRANSFER (ta);	1172	TRANSFER (ta);
1051	}	1173	}
1052		1174
1053	static void	1175	static int
1054	api_cede (void)	1176	api_cede (void)
1055	{	1177	{
		1178	dTHX;
1056	struct transfer_args ta;	1179	struct transfer_args ta;
1057		1180
1058	prepare_cede (&ta);	1181	prepare_cede (aTHX_ &ta);
		1182
		1183	if (ta.prev != ta.next)
		1184	{
1059	TRANSFER (ta);	1185	TRANSFER (ta);
		1186	return 1;
		1187	}
		1188	else
		1189	return 0;
		1190	}
		1191
		1192	static int
		1193	api_cede_notself (void)
		1194	{
		1195	dTHX;
		1196	struct transfer_args ta;
		1197
		1198	if (prepare_cede_notself (aTHX_ &ta))
		1199	{
		1200	TRANSFER (ta);
		1201	return 1;
		1202	}
		1203	else
		1204	return 0;
1060	}	1205	}
1061		1206
1062	MODULE = Coro::State PACKAGE = Coro::State	1207	MODULE = Coro::State PACKAGE = Coro::State
1063		1208
1064	PROTOTYPES: DISABLE	1209	PROTOTYPES: DISABLE
…		…
1074		1219
1075	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1076	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1077	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1078	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));	1223	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1225	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1079	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1226	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1080		1227
1081	main_mainstack = PL_mainstack;	1228	main_mainstack = PL_mainstack;
		1229	main_top_env = PL_top_env;
		1230
		1231	while (main_top_env->je_prev)
		1232	main_top_env = main_top_env->je_prev;
1082		1233
1083	coroapi.ver = CORO_API_VERSION;	1234	coroapi.ver = CORO_API_VERSION;
1084	coroapi.transfer = api_transfer;	1235	coroapi.transfer = api_transfer;
1085		1236
1086	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1237	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1094	HV *hv;	1245	HV *hv;
1095	int i;	1246	int i;
1096		1247
1097	Newz (0, coro, 1, struct coro);	1248	Newz (0, coro, 1, struct coro);
1098	coro->args = newAV ();	1249	coro->args = newAV ();
1099	coro->save = CORO_SAVE_ALL;	1250	coro->save = CORO_SAVE_DEF;
1100	coro->flags = CF_NEW;	1251	coro->flags = CF_NEW;
1101		1252
		1253	if (coro_first) coro_first->prev = coro;
		1254	coro->next = coro_first;
		1255	coro_first = coro;
		1256
1102	hv = newHV ();	1257	coro->hv = hv = newHV ();
1103	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1258	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1104	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1259	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1105		1260
1106	for (i = 1; i < items; i++)	1261	for (i = 1; i < items; i++)
1107	av_push (coro->args, newSVsv (ST (i)));	1262	av_push (coro->args, newSVsv (ST (i)));
…		…
1114	CODE:	1269	CODE:
1115	RETVAL = api_save (coro, new_save);	1270	RETVAL = api_save (coro, new_save);
1116	OUTPUT:	1271	OUTPUT:
1117	RETVAL	1272	RETVAL
1118		1273
		1274	int
		1275	save_also (SV *coro_sv, int save_also)
		1276	CODE:
		1277	{
		1278	struct coro *coro = SvSTATE (coro_sv);
		1279	RETVAL = coro->save;
		1280	coro->save |= save_also;
		1281	}
		1282	OUTPUT:
		1283	RETVAL
		1284
1119	void	1285	void
1120	_set_stacklevel (...)	1286	_set_stacklevel (...)
1121	ALIAS:	1287	ALIAS:
1122	Coro::State::transfer = 1	1288	Coro::State::transfer = 1
1123	Coro::schedule = 2	1289	Coro::schedule = 2
1124	Coro::cede = 3	1290	Coro::cede = 3
		1291	Coro::cede_notself = 4
1125	CODE:	1292	CODE:
1126	{	1293	{
1127	struct transfer_args ta;	1294	struct transfer_args ta;
1128		1295
1129	switch (ix)	1296	switch (ix)
…		…
1135		1302
1136	case 1:	1303	case 1:
1137	if (items != 2)	1304	if (items != 2)
1138	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1305	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1139		1306
1140	prepare_transfer (&ta, ST (0), ST (1));	1307	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1141	break;	1308	break;
1142		1309
1143	case 2:	1310	case 2:
1144	prepare_schedule (&ta);	1311	prepare_schedule (aTHX_ &ta);
1145	break;	1312	break;
1146		1313
1147	case 3:	1314	case 3:
1148	prepare_cede (&ta);	1315	prepare_cede (aTHX_ &ta);
		1316	break;
		1317
		1318	case 4:
		1319	if (!prepare_cede_notself (aTHX_ &ta))
		1320	XSRETURN_EMPTY;
		1321
1149	break;	1322	break;
1150	}	1323	}
1151		1324
		1325	BARRIER;
1152	TRANSFER (ta);	1326	TRANSFER (ta);
1153	}
1154		1327
1155	void	1328	if (GIMME_V != G_VOID && ta.next != ta.prev)
1156	_clone_state_from (SV *dst, SV *src)	1329	XSRETURN_YES;
		1330	}
		1331
		1332	bool
		1333	_destroy (SV *coro_sv)
1157	CODE:	1334	CODE:
1158	{	1335	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1159	struct coro *coro_src = SvSTATE (src);	1336	OUTPUT:
1160		1337	RETVAL
1161	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1162
1163	++coro_src->refcnt;
1164	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1165	}
1166		1338
1167	void	1339	void
1168	_exit (code)	1340	_exit (code)
1169	int code	1341	int code
1170	PROTOTYPE: $	1342	PROTOTYPE: $
1171	CODE:	1343	CODE:
1172	_exit (code);	1344	_exit (code);
1173		1345
1174	int	1346	int
		1347	cctx_stacksize (int new_stacksize = 0)
		1348	CODE:
		1349	RETVAL = coro_stacksize;
		1350	if (new_stacksize)
		1351	coro_stacksize = new_stacksize;
		1352	OUTPUT:
		1353	RETVAL
		1354
		1355	int
1175	cctx_count ()	1356	cctx_count ()
1176	CODE:	1357	CODE:
1177	RETVAL = cctx_count;	1358	RETVAL = cctx_count;
1178	OUTPUT:	1359	OUTPUT:
1179	RETVAL	1360	RETVAL
…		…
1183	CODE:	1364	CODE:
1184	RETVAL = cctx_idle;	1365	RETVAL = cctx_idle;
1185	OUTPUT:	1366	OUTPUT:
1186	RETVAL	1367	RETVAL
1187		1368
		1369	void
		1370	list ()
		1371	PPCODE:
		1372	{
		1373	struct coro *coro;
		1374	for (coro = coro_first; coro; coro = coro->next)
		1375	if (coro->hv)
		1376	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1377	}
		1378
		1379	void
		1380	_eval (Coro::State coro, SV *coderef)
		1381	CODE:
		1382	{
		1383	if (coro->mainstack)
		1384	{
		1385	struct coro temp;
		1386	Zero (&temp, 1, struct coro);
		1387	temp.save = CORO_SAVE_ALL;
		1388
		1389	if (!(coro->flags & CF_RUNNING))
		1390	{
		1391	save_perl (aTHX_ &temp);
		1392	load_perl (aTHX_ coro);
		1393	}
		1394
		1395	{
		1396	dSP;
		1397	ENTER;
		1398	SAVETMPS;
		1399	PUSHMARK (SP);
		1400	PUTBACK;
		1401	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1402	SPAGAIN;
		1403	FREETMPS;
		1404	LEAVE;
		1405	PUTBACK;
		1406	}
		1407
		1408	if (!(coro->flags & CF_RUNNING))
		1409	{
		1410	save_perl (aTHX_ coro);
		1411	load_perl (aTHX_ &temp);
		1412	}
		1413	}
		1414	}
		1415
		1416	SV *
		1417	is_ready (Coro::State coro)
		1418	PROTOTYPE: $
		1419	ALIAS:
		1420	is_ready = CF_READY
		1421	is_running = CF_RUNNING
		1422	is_new = CF_NEW
		1423	is_destroyed = CF_DESTROYED
		1424	CODE:
		1425	RETVAL = boolSV (coro->flags & ix);
		1426	OUTPUT:
		1427	RETVAL
		1428
		1429	IV
		1430	rss (Coro::State coro)
		1431	PROTOTYPE: $
		1432	CODE:
		1433	RETVAL = coro_rss (coro);
		1434	OUTPUT:
		1435	RETVAL
		1436
		1437
1188	MODULE = Coro::State PACKAGE = Coro	1438	MODULE = Coro::State PACKAGE = Coro
1189		1439
1190	BOOT:	1440	BOOT:
1191	{	1441	{
1192	int i;	1442	int i;
…		…
1207	coro_ready[i] = newAV ();	1457	coro_ready[i] = newAV ();
1208		1458
1209	{	1459	{
1210	SV *sv = perl_get_sv("Coro::API", 1);	1460	SV *sv = perl_get_sv("Coro::API", 1);
1211		1461
1212	coroapi.schedule = api_schedule;	1462	coroapi.schedule = api_schedule;
1213	coroapi.save = api_save;	1463	coroapi.save = api_save;
1214	coroapi.cede = api_cede;	1464	coroapi.cede = api_cede;
		1465	coroapi.cede_notself = api_cede_notself;
1215	coroapi.ready = api_ready;	1466	coroapi.ready = api_ready;
1216	coroapi.is_ready = api_is_ready;	1467	coroapi.is_ready = api_is_ready;
1217	coroapi.nready = &coro_nready;	1468	coroapi.nready = &coro_nready;
1218	coroapi.current = coro_current;	1469	coroapi.current = coro_current;
1219		1470
1220	GCoroAPI = &coroapi;	1471	GCoroAPI = &coroapi;
1221	sv_setiv (sv, (IV)&coroapi);	1472	sv_setiv (sv, (IV)&coroapi);
1222	SvREADONLY_on (sv);	1473	SvREADONLY_on (sv);
1223	}	1474	}
…		…
1239	RETVAL = coro->prio;	1490	RETVAL = coro->prio;
1240		1491
1241	if (items > 1)	1492	if (items > 1)
1242	{	1493	{
1243	if (ix)	1494	if (ix)
1244	newprio += coro->prio;	1495	newprio = coro->prio - newprio;
1245		1496
1246	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1497	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1247	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1498	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1248		1499
1249	coro->prio = newprio;	1500	coro->prio = newprio;
1250	}	1501	}
1251	}	1502	}
		1503	OUTPUT:
		1504	RETVAL
1252		1505
1253	SV *	1506	SV *
1254	ready (SV *self)	1507	ready (SV *self)
1255	PROTOTYPE: $	1508	PROTOTYPE: $
1256	CODE:	1509	CODE:
1257	RETVAL = boolSV (api_ready (self));	1510	RETVAL = boolSV (api_ready (self));
1258	OUTPUT:	1511	OUTPUT:
1259	RETVAL	1512	RETVAL
1260		1513
1261	SV *
1262	is_ready (SV *self)
1263	PROTOTYPE: $
1264	CODE:
1265	RETVAL = boolSV (api_is_ready (self));
1266	OUTPUT:
1267	RETVAL
1268
1269	int	1514	int
1270	nready (...)	1515	nready (...)
1271	PROTOTYPE:	1516	PROTOTYPE:
1272	CODE:	1517	CODE:
1273	RETVAL = coro_nready;	1518	RETVAL = coro_nready;

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