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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 1.155 by root, Fri Sep 21 01:09:36 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
		400	EXTEND (SP, 3 + 1);
355	PUSHs (Nullsv);	401	PUSHs (Nullsv);
356	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
357	for (;;)	403	for (;;)
358	{	404	{
359	while (cxix >= 0)	405	while (cxix >= 0)
360	{	406	{
361	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
362		408
363	if (CxTYPE (cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
364	{	410	{
365	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
366		412
367	if (CvDEPTH (cv))	413	if (CvDEPTH (cv))
368	{	414	{
369	EXTEND (SP, 3);	415	EXTEND (SP, 3);
370
371	PUSHs ((SV *)CvPADLIST (cv));	416	PUSHs ((SV *)CvPADLIST (cv));
372	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
374		419
375	CvDEPTH (cv) = 0;	420	CvDEPTH (cv) = 0;
376	get_padlist (cv);	421	get_padlist (aTHX_ cv);
377	}	422	}
378	}	423	}
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	}	424	}
388		425
389	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
390	break;	427	break;
391		428
…		…
398	}	435	}
399		436
400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	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;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	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;	441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
404		442
405	#define VAR(name,type)c->name = PL_ ## name;	443	#define VAR(name,type)c->name = PL_ ## name;
406	# include "state.h"	444	# include "state.h"
407	#undef VAR	445	#undef VAR
…		…
411	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
412	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
413	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
414	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
415	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
416	static void	457	static void
417	coro_init_stacks ()	458	coro_init_stacks (pTHX)
418	{	459	{
419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	460	PL_curstackinfo = new_stackinfo(64, 4);
420	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
421	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423		464
424	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
425	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427		468
428	New(50,PL_tmps_stack,128,SV*);	469	New(50,PL_tmps_stack,64,SV*);
429	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
430	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
431	PL_tmps_max = 128;	472	PL_tmps_max = 64;
432		473
433	New(54,PL_markstack,32,I32);	474	New(54,PL_markstack,16,I32);
434	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
435	PL_markstack_max = PL_markstack + 32;	476	PL_markstack_max = PL_markstack + 16;
436		477
437	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
438	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
439	#endif	480	#endif
440		481
441	New(54,PL_scopestack,32,I32);	482	New(54,PL_scopestack,16,I32);
442	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
443	PL_scopestack_max = 32;	484	PL_scopestack_max = 16;
444		485
445	New(54,PL_savestack,64,ANY);	486	New(54,PL_savestack,64,ANY);
446	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
447	PL_savestack_max = 64;	488	PL_savestack_max = 64;
448		489
449	#if !PERL_VERSION_ATLEAST (5,9,0)	490	#if !PERL_VERSION_ATLEAST (5,9,0)
450	New(54,PL_retstack,16,OP*);	491	New(54,PL_retstack,8,OP*);
451	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
452	PL_retstack_max = 16;	493	PL_retstack_max = 8;
453	#endif	494	#endif
454	}	495	}
		496	#endif
455		497
456	/*	498	/*
457	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
458	*/	500	*/
459	static void	501	static void
460	coro_destroy_stacks ()	502	coro_destroy_stacks (pTHX)
461	{	503	{
462	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
463	{	505	{
464	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
465	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
466		509
467	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
468	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
469		513
		514	/* unwind all extra stacks */
470	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
471	}	519	}
472		520
473	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
474	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
475		523
476	while (PL_curstackinfo)	524	while (PL_curstackinfo)
477	{	525	{
478	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
479		527
480	{ /*D*//*remove*/
481	dSP;
482	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
483	PUTBACK; /* possibly superfluous */
484	}
485
486	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
487	{
488	dounwind (-1);/*D*//*remove*/
489	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
490	}
491		530
492	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
493	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
494	PL_curstackinfo = p;	533	PL_curstackinfo = p;
495	}	534	}
…		…
501	#if !PERL_VERSION_ATLEAST (5,9,0)	540	#if !PERL_VERSION_ATLEAST (5,9,0)
502	Safefree (PL_retstack);	541	Safefree (PL_retstack);
503	#endif	542	#endif
504	}	543	}
505		544
		545	static size_t
		546	coro_rss (struct coro *coro)
		547	{
		548	size_t rss = sizeof (coro);
		549
		550	if (coro->mainstack)
		551	{
		552	if (coro->flags & CF_RUNNING)
		553	{
		554	#define VAR(name,type)coro->name = PL_ ## name;
		555	# include "state.h"
		556	#undef VAR
		557	}
		558
		559	rss += sizeof (coro->curstackinfo);
		560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		561	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		562	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		563	rss += coro->tmps_max * sizeof (SV *);
		564	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		565	rss += coro->scopestack_max * sizeof (I32);
		566	rss += coro->savestack_max * sizeof (ANY);
		567
		568	#if !PERL_VERSION_ATLEAST (5,9,0)
		569	rss += coro->retstack_max * sizeof (OP *);
		570	#endif
		571	}
		572
		573	return rss;
		574	}
		575
		576	/** coroutine stack handling ************************************************/
		577
506	static void	578	static void
507	setup_coro (struct coro *coro)	579	setup_coro (pTHX_ struct coro *coro)
508	{	580	{
509	/*	581	/*
510	* emulate part of the perl startup here.	582	* emulate part of the perl startup here.
511	*/	583	*/
512
513	coro_init_stacks ();	584	coro_init_stacks (aTHX);
514		585
515	PL_curcop = &PL_compiling;	586	PL_curcop = &PL_compiling;
516	PL_in_eval = EVAL_NULL;	587	PL_in_eval = EVAL_NULL;
		588	PL_comppad = 0;
517	PL_curpm = 0;	589	PL_curpm = 0;
518	PL_localizing = 0;	590	PL_localizing = 0;
519	PL_dirty = 0;	591	PL_dirty = 0;
520	PL_restartop = 0;	592	PL_restartop = 0;
521		593
…		…
529	Zero (&myop, 1, LOGOP);	601	Zero (&myop, 1, LOGOP);
530	myop.op_next = Nullop;	602	myop.op_next = Nullop;
531	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID;
532		604
533	PUSHMARK (SP);	605	PUSHMARK (SP);
534	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	606	XPUSHs (av_shift (GvAV (PL_defgv)));
535	PUTBACK;	607	PUTBACK;
536	PL_op = (OP *)&myop;	608	PL_op = (OP *)&myop;
537	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	609	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
538	SPAGAIN;	610	SPAGAIN;
539	}	611	}
540		612
541	ENTER; /* necessary e.g. for dounwind */	613	ENTER; /* necessary e.g. for dounwind */
542	}	614	}
543		615
544	static void	616	static void
545	free_coro_mortal ()	617	free_coro_mortal (pTHX)
546	{	618	{
547	if (coro_mortal)	619	if (coro_mortal)
548	{	620	{
549	SvREFCNT_dec (coro_mortal);	621	SvREFCNT_dec (coro_mortal);
550	coro_mortal = 0;	622	coro_mortal = 0;
551	}	623	}
552	}	624	}
553		625
554	/* inject a fake call to Coro::State::_cctx_init into the execution */	626	/* inject a fake call to Coro::State::_cctx_init into the execution */
		627	/* _cctx_init should be careful, as it could be called at almost any time */
		628	/* during execution of a perl program */
555	static void NOINLINE	629	static void NOINLINE
556	prepare_cctx (coro_cctx *cctx)	630	prepare_cctx (pTHX_ coro_cctx *cctx)
557	{	631	{
558	dSP;	632	dSP;
559	LOGOP myop;	633	LOGOP myop;
560		634
561	Zero (&myop, 1, LOGOP);	635	Zero (&myop, 1, LOGOP);
…		…
570	PL_op = (OP *)&myop;	644	PL_op = (OP *)&myop;
571	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
572	SPAGAIN;	646	SPAGAIN;
573	}	647	}
574		648
		649	/*
		650	* this is a _very_ stripped down perl interpreter ;)
		651	*/
575	static void	652	static void
576	coro_run (void *arg)	653	coro_run (void *arg)
577	{	654	{
		655	dTHX;
		656
578	/* coro_run is the alternative tail of transfer(), so unlock here. */	657	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	658	UNLOCK;
580		659
581	/*
582	* this is a _very_ stripped down perl interpreter ;)
583	*/
584	PL_top_env = &PL_start_env;	660	PL_top_env = &PL_start_env;
585		661
586	/* inject call to cctx_init */	662	/* inject a fake subroutine call to cctx_init */
587	prepare_cctx ((coro_cctx *)arg);	663	prepare_cctx (aTHX_ (coro_cctx *)arg);
588		664
589	/* somebody will hit me for both perl_run and PL_restartop */	665	/* somebody or something will hit me for both perl_run and PL_restartop */
590	PL_restartop = PL_op;	666	PL_restartop = PL_op;
591	perl_run (PL_curinterp);	667	perl_run (PL_curinterp);
592		668
593	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	669	/*
594	abort ();	670	* If perl-run returns we assume exit() was being called or the coro
		671	* fell off the end, which seems to be the only valid (non-bug)
		672	* reason for perl_run to return. We try to exit by jumping to the
		673	* bootstrap-time "top" top_env, as we cannot restore the "main"
		674	* coroutine as Coro has no such concept
		675	*/
		676	PL_top_env = main_top_env;
		677	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
595	}	678	}
596		679
597	static coro_cctx *	680	static coro_cctx *
598	cctx_new ()	681	cctx_new ()
599	{	682	{
600	coro_cctx *cctx;	683	coro_cctx *cctx;
		684	void *stack_start;
		685	size_t stack_size;
601		686
602	++cctx_count;	687	++cctx_count;
603		688
604	Newz (0, cctx, 1, coro_cctx);	689	Newz (0, cctx, 1, coro_cctx);
605		690
606	#if HAVE_MMAP	691	#if HAVE_MMAP
607		692
608	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	693	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
609	/* mmap supposedly does allocate-on-write for us */	694	/* 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);	695	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		696
612	if (cctx->sptr == (void *)-1)	697	if (cctx->sptr != (void *)-1)
613	{
614	perror ("FATAL: unable to mmap stack for coroutine");
615	_exit (EXIT_FAILURE);
616	}	698	{
617
618	# if STACKGUARD	699	# if CORO_STACKGUARD
619	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	700	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
620	# endif	701	# endif
		702	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		703	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		704	cctx->mapped = 1;
		705	}
		706	else
		707	#endif
		708	{
		709	cctx->ssize = coro_stacksize * (long)sizeof (long);
		710	New (0, cctx->sptr, coro_stacksize, long);
621		711
622	#else
623
624	cctx->ssize = STACKSIZE * (long)sizeof (long);
625	New (0, cctx->sptr, STACKSIZE, long);
626
627	if (!cctx->sptr)	712	if (!cctx->sptr)
628	{	713	{
629	perror ("FATAL: unable to malloc stack for coroutine");	714	perror ("FATAL: unable to allocate stack for coroutine");
630	_exit (EXIT_FAILURE);	715	_exit (EXIT_FAILURE);
631	}	716	}
632		717
633	#endif	718	stack_start = cctx->sptr;
		719	stack_size = cctx->ssize;
		720	}
634		721
635	#if USE_VALGRIND	722	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);	723	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
643		724
644	return cctx;	725	return cctx;
645	}	726	}
646		727
647	static void	728	static void
…		…
650	if (!cctx)	731	if (!cctx)
651	return;	732	return;
652		733
653	--cctx_count;	734	--cctx_count;
654		735
655	#if USE_VALGRIND	736	#if CORO_USE_VALGRIND
656	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	737	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
657	#endif	738	#endif
658		739
659	#if HAVE_MMAP	740	#if HAVE_MMAP
		741	if (cctx->mapped)
660	munmap (cctx->sptr, cctx->ssize);	742	munmap (cctx->sptr, cctx->ssize);
661	#else	743	else
		744	#endif
662	Safefree (cctx->sptr);	745	Safefree (cctx->sptr);
663	#endif
664		746
665	Safefree (cctx);	747	Safefree (cctx);
666	}	748	}
667		749
668	static coro_cctx *	750	static coro_cctx *
669	cctx_get ()	751	cctx_get (pTHX)
670	{	752	{
671	coro_cctx *cctx;
672
673	if (cctx_first)	753	while (cctx_first)
674	{	754	{
675	cctx = cctx_first;	755	coro_cctx *cctx = cctx_first;
676	cctx_first = cctx->next;	756	cctx_first = cctx->next;
677	--cctx_idle;	757	--cctx_idle;
		758
		759	if (cctx->ssize >= coro_stacksize)
		760	return cctx;
		761
		762	cctx_destroy (cctx);
678	}	763	}
679	else	764
680	{
681	cctx = cctx_new ();
682	PL_op = PL_op->op_next;	765	PL_op = PL_op->op_next;
683	}
684
685	return cctx;	766	return cctx_new ();
686	}	767	}
687		768
688	static void	769	static void
689	cctx_put (coro_cctx *cctx)	770	cctx_put (coro_cctx *cctx)
690	{	771	{
…		…
702	++cctx_idle;	783	++cctx_idle;
703	cctx->next = cctx_first;	784	cctx->next = cctx_first;
704	cctx_first = cctx;	785	cctx_first = cctx;
705	}	786	}
706		787
		788	/** coroutine switching *****************************************************/
		789
707	/* never call directly, always through the coro_state_transfer global variable */	790	/* never call directly, always through the coro_state_transfer global variable */
708	static void NOINLINE	791	static void NOINLINE
709	transfer (struct coro *prev, struct coro *next)	792	transfer (pTHX_ struct coro *prev, struct coro *next)
710	{	793	{
711	dSTACKLEVEL;	794	dSTACKLEVEL;
712		795
713	/* sometimes transfer is only called to set idle_sp */	796	/* sometimes transfer is only called to set idle_sp */
714	if (!next)	797	if (!next)
715	{	798	{
716	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	799	((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 */	800	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
718	}	801	}
719	else if (prev != next)	802	else if (prev != next)
720	{	803	{
721	coro_cctx *prev__cctx;	804	coro_cctx *prev__cctx;
722		805
…		…
734	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	817	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
735		818
736	if (next->flags & CF_RUNNING)	819	if (next->flags & CF_RUNNING)
737	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	820	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
738		821
		822	if (next->flags & CF_DESTROYED)
		823	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		824
739	prev->flags &= ~CF_RUNNING;	825	prev->flags &= ~CF_RUNNING;
740	next->flags |= CF_RUNNING;	826	next->flags |= CF_RUNNING;
741		827
742	LOCK;	828	LOCK;
743		829
744	if (next->flags & CF_NEW)	830	if (next->flags & CF_NEW)
745	{	831	{
746	/* need to start coroutine */	832	/* need to start coroutine */
747	next->flags &= ~CF_NEW;	833	next->flags &= ~CF_NEW;
748	/* first get rid of the old state */	834	/* first get rid of the old state */
749	save_perl (prev);	835	save_perl (aTHX_ prev);
750	/* setup coroutine call */	836	/* setup coroutine call */
751	setup_coro (next);	837	setup_coro (aTHX_ next);
752	/* need a new stack */	838	/* need a new stack */
753	assert (!next->cctx);	839	assert (!next->cctx);
754	}	840	}
755	else	841	else
756	{	842	{
757	/* coroutine already started */	843	/* coroutine already started */
758	save_perl (prev);	844	save_perl (aTHX_ prev);
759	load_perl (next);	845	load_perl (aTHX_ next);
760	}	846	}
761		847
762	prev__cctx = prev->cctx;	848	prev__cctx = prev->cctx;
763		849
764	/* possibly "free" the cctx */	850	/* possibly "free" the cctx */
765	if (prev__cctx->idle_sp == STACKLEVEL)	851	if (prev__cctx->idle_sp == STACKLEVEL)
766	{	852	{
767	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	853	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
768	assert (PL_top_env == prev__cctx->top_env);	854	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
769		855
770	prev->cctx = 0;	856	prev->cctx = 0;
771		857
772	cctx_put (prev__cctx);	858	cctx_put (prev__cctx);
773	prev__cctx->inuse = 0;	859	prev__cctx->inuse = 0;
774	}	860	}
775		861
776	if (!next->cctx)	862	if (!next->cctx)
777	{	863	{
778	next->cctx = cctx_get ();	864	next->cctx = cctx_get (aTHX);
779	assert (!next->cctx->inuse);	865	assert (!next->cctx->inuse);
780	next->cctx->inuse = 1;	866	next->cctx->inuse = 1;
781	}	867	}
782		868
783	if (prev__cctx != next->cctx)	869	if (prev__cctx != next->cctx)
…		…
785	prev__cctx->top_env = PL_top_env;	871	prev__cctx->top_env = PL_top_env;
786	PL_top_env = next->cctx->top_env;	872	PL_top_env = next->cctx->top_env;
787	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	873	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
788	}	874	}
789		875
790	free_coro_mortal ();	876	free_coro_mortal (aTHX);
791
792	UNLOCK;	877	UNLOCK;
793	}	878	}
794	}	879	}
795		880
796	struct transfer_args	881	struct transfer_args
797	{	882	{
798	struct coro *prev, *next;	883	struct coro *prev, *next;
799	};	884	};
800		885
801	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	886	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
802		887
		888	/** high level stuff ********************************************************/
		889
803	static void	890	static int
804	coro_state_destroy (struct coro *coro)	891	coro_state_destroy (pTHX_ struct coro *coro)
805	{	892	{
806	if (coro->refcnt--)	893	if (coro->flags & CF_DESTROYED)
807	return;	894	return 0;
		895
		896	coro->flags |= CF_DESTROYED;
		897
		898	if (coro->flags & CF_READY)
		899	{
		900	/* reduce nready, as destroying a ready coro effectively unreadies it */
		901	/* alternative: look through all ready queues and remove the coro */
		902	LOCK;
		903	--coro_nready;
		904	UNLOCK;
		905	}
		906	else
		907	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
808		908
809	if (coro->mainstack && coro->mainstack != main_mainstack)	909	if (coro->mainstack && coro->mainstack != main_mainstack)
810	{	910	{
811	struct coro temp;	911	struct coro temp;
		912
		913	assert (!(coro->flags & CF_RUNNING));
		914
812	Zero (&temp, 1, struct coro);	915	Zero (&temp, 1, struct coro);
813	temp.save = CORO_SAVE_ALL;	916	temp.save = CORO_SAVE_ALL;
814		917
815	if (coro->flags & CF_RUNNING)	918	if (coro->flags & CF_RUNNING)
816	croak ("FATAL: tried to destroy currently running coroutine");	919	croak ("FATAL: tried to destroy currently running coroutine");
817		920
818	save_perl (&temp);	921	save_perl (aTHX_ &temp);
819	load_perl (coro);	922	load_perl (aTHX_ coro);
820		923
821	coro_destroy_stacks ();	924	coro_destroy_stacks (aTHX);
822		925
823	load_perl (&temp); /* this will get rid of defsv etc.. */	926	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
824		927
825	coro->mainstack = 0;	928	coro->mainstack = 0;
826	}	929	}
827		930
828	cctx_destroy (coro->cctx);	931	cctx_destroy (coro->cctx);
829	SvREFCNT_dec (coro->args);	932	SvREFCNT_dec (coro->args);
830	Safefree (coro);	933
		934	if (coro->next) coro->next->prev = coro->prev;
		935	if (coro->prev) coro->prev->next = coro->next;
		936	if (coro == coro_first) coro_first = coro->next;
		937
		938	return 1;
831	}	939	}
832		940
833	static int	941	static int
834	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	942	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
835	{	943	{
836	struct coro *coro = (struct coro *)mg->mg_ptr;	944	struct coro *coro = (struct coro *)mg->mg_ptr;
837	mg->mg_ptr = 0;	945	mg->mg_ptr = 0;
838		946
		947	coro->hv = 0;
		948
		949	if (--coro->refcnt < 0)
		950	{
839	coro_state_destroy (coro);	951	coro_state_destroy (aTHX_ coro);
		952	Safefree (coro);
		953	}
840		954
841	return 0;	955	return 0;
842	}	956	}
843		957
844	static int	958	static int
…		…
851	return 0;	965	return 0;
852	}	966	}
853		967
854	static MGVTBL coro_state_vtbl = {	968	static MGVTBL coro_state_vtbl = {
855	0, 0, 0, 0,	969	0, 0, 0, 0,
856	coro_state_clear,	970	coro_state_free,
857	0,	971	0,
858	#ifdef MGf_DUP	972	#ifdef MGf_DUP
859	coro_state_dup,	973	coro_state_dup,
860	#else	974	#else
861	# define MGf_DUP 0	975	# define MGf_DUP 0
862	#endif	976	#endif
863	};	977	};
864		978
865	static struct coro *	979	static struct coro *
866	SvSTATE (SV *coro)	980	SvSTATE_ (pTHX_ SV *coro)
867	{	981	{
868	HV *stash;	982	HV *stash;
869	MAGIC *mg;	983	MAGIC *mg;
870		984
871	if (SvROK (coro))	985	if (SvROK (coro))
…		…
877	/* very slow, but rare, check */	991	/* very slow, but rare, check */
878	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	992	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
879	croak ("Coro::State object required");	993	croak ("Coro::State object required");
880	}	994	}
881		995
882	mg = SvMAGIC (coro);	996	mg = CORO_MAGIC (coro);
883	assert (mg->mg_type == PERL_MAGIC_ext);
884	return (struct coro *)mg->mg_ptr;	997	return (struct coro *)mg->mg_ptr;
885	}	998	}
886		999
		1000	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1001
887	static void	1002	static void
888	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1003	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
889	{	1004	{
890	ta->prev = SvSTATE (prev_sv);	1005	ta->prev = SvSTATE (prev_sv);
891	ta->next = SvSTATE (next_sv);	1006	ta->next = SvSTATE (next_sv);
892	}	1007	}
893		1008
894	static void	1009	static void
895	api_transfer (SV *prev_sv, SV *next_sv)	1010	api_transfer (SV *prev_sv, SV *next_sv)
896	{	1011	{
		1012	dTHX;
897	struct transfer_args ta;	1013	struct transfer_args ta;
898		1014
899	prepare_transfer (&ta, prev_sv, next_sv);	1015	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900	TRANSFER (ta);	1016	TRANSFER (ta);
901	}	1017	}
902		1018
903	static int	1019	static int
904	api_save (SV *coro_sv, int new_save)	1020	api_save (SV *coro_sv, int new_save)
905	{	1021	{
		1022	dTHX;
906	struct coro *coro = SvSTATE (coro_sv);	1023	struct coro *coro = SvSTATE (coro_sv);
907	int old_save = coro->save;	1024	int old_save = coro->save;
908		1025
909	if (new_save >= 0)	1026	if (new_save >= 0)
910	coro->save = new_save;	1027	coro->save = new_save;
…		…
912	return old_save;	1029	return old_save;
913	}	1030	}
914		1031
915	/** Coro ********************************************************************/	1032	/** Coro ********************************************************************/
916		1033
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	1034	static void
930	coro_enq (SV *coro_sv)	1035	coro_enq (pTHX_ SV *coro_sv)
931	{	1036	{
932	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1037	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
933	coro_nready++;
934	}	1038	}
935		1039
936	static SV *	1040	static SV *
937	coro_deq (int min_prio)	1041	coro_deq (pTHX_ int min_prio)
938	{	1042	{
939	int prio = PRIO_MAX - PRIO_MIN;	1043	int prio = PRIO_MAX - PRIO_MIN;
940		1044
941	min_prio -= PRIO_MIN;	1045	min_prio -= PRIO_MIN;
942	if (min_prio < 0)	1046	if (min_prio < 0)
943	min_prio = 0;	1047	min_prio = 0;
944		1048
945	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1049	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
946	if (AvFILLp (coro_ready [prio]) >= 0)	1050	if (AvFILLp (coro_ready [prio]) >= 0)
947	{
948	coro_nready--;
949	return av_shift (coro_ready [prio]);	1051	return av_shift (coro_ready [prio]);
950	}
951		1052
952	return 0;	1053	return 0;
953	}	1054	}
954		1055
955	static int	1056	static int
956	api_ready (SV *coro_sv)	1057	api_ready (SV *coro_sv)
957	{	1058	{
		1059	dTHX;
958	struct coro *coro;	1060	struct coro *coro;
959		1061
960	if (SvROK (coro_sv))	1062	if (SvROK (coro_sv))
961	coro_sv = SvRV (coro_sv);	1063	coro_sv = SvRV (coro_sv);
962		1064
963	coro = SvSTATE (coro_sv);	1065	coro = SvSTATE (coro_sv);
964		1066
965	if (coro->flags & CF_READY)	1067	if (coro->flags & CF_READY)
966	return 0;	1068	return 0;
967		1069
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;	1070	coro->flags |= CF_READY;
974		1071
975	LOCK;	1072	LOCK;
976	coro_enq (SvREFCNT_inc (coro_sv));	1073	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1074	++coro_nready;
977	UNLOCK;	1075	UNLOCK;
978		1076
979	return 1;	1077	return 1;
980	}	1078	}
981		1079
982	static int	1080	static int
983	api_is_ready (SV *coro_sv)	1081	api_is_ready (SV *coro_sv)
984	{	1082	{
		1083	dTHX;
985	return !!SvSTATE (coro_sv)->flags & CF_READY;	1084	return !!(SvSTATE (coro_sv)->flags & CF_READY);
986	}	1085	}
987		1086
988	static void	1087	static void
989	prepare_schedule (struct transfer_args *ta)	1088	prepare_schedule (pTHX_ struct transfer_args *ta)
990	{	1089	{
991	SV *prev, *next;	1090	SV *prev_sv, *next_sv;
992		1091
993	for (;;)	1092	for (;;)
994	{	1093	{
995	LOCK;	1094	LOCK;
996	next = coro_deq (PRIO_MIN);	1095	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1096
		1097	/* nothing to schedule: call the idle handler */
		1098	if (!next_sv)
		1099	{
		1100	dSP;
		1101	UNLOCK;
		1102
		1103	ENTER;
		1104	SAVETMPS;
		1105
		1106	PUSHMARK (SP);
		1107	PUTBACK;
		1108	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1109
		1110	FREETMPS;
		1111	LEAVE;
		1112	continue;
		1113	}
		1114
		1115	ta->next = SvSTATE (next_sv);
		1116
		1117	/* cannot transfer to destroyed coros, skip and look for next */
		1118	if (ta->next->flags & CF_DESTROYED)
		1119	{
		1120	UNLOCK;
		1121	SvREFCNT_dec (next_sv);
		1122	/* coro_nready is already taken care of by destroy */
		1123	continue;
		1124	}
		1125
		1126	--coro_nready;
997	UNLOCK;	1127	UNLOCK;
998
999	if (next)
1000	break;	1128	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	}	1129	}
1015	}
1016
1017	prev = SvRV (coro_current);
1018	SvRV_set (coro_current, next);
1019		1130
1020	/* free this only after the transfer */	1131	/* free this only after the transfer */
1021	LOCK;	1132	prev_sv = SvRV (coro_current);
1022	free_coro_mortal ();	1133	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);	1134	ta->prev = SvSTATE (prev_sv);
1030	ta->next = SvSTATE (next);
1031		1135
1032	assert (ta->next->flags & CF_READY);	1136	assert (ta->next->flags & CF_READY);
1033	ta->next->flags &= ~CF_READY;	1137	ta->next->flags &= ~CF_READY;
1034	}
1035		1138
		1139	LOCK;
		1140	free_coro_mortal (aTHX);
		1141	coro_mortal = prev_sv;
		1142	UNLOCK;
		1143	}
		1144
1036	static void	1145	static void
1037	prepare_cede (struct transfer_args *ta)	1146	prepare_cede (pTHX_ struct transfer_args *ta)
1038	{	1147	{
1039	api_ready (coro_current);	1148	api_ready (coro_current);
1040
1041	prepare_schedule (ta);	1149	prepare_schedule (aTHX_ ta);
		1150	}
		1151
		1152	static int
		1153	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1154	{
		1155	if (coro_nready)
		1156	{
		1157	SV *prev = SvRV (coro_current);
		1158	prepare_schedule (aTHX_ ta);
		1159	api_ready (prev);
		1160	return 1;
		1161	}
		1162	else
		1163	return 0;
1042	}	1164	}
1043		1165
1044	static void	1166	static void
1045	api_schedule (void)	1167	api_schedule (void)
1046	{	1168	{
		1169	dTHX;
1047	struct transfer_args ta;	1170	struct transfer_args ta;
1048		1171
1049	prepare_schedule (&ta);	1172	prepare_schedule (aTHX_ &ta);
1050	TRANSFER (ta);	1173	TRANSFER (ta);
1051	}	1174	}
1052		1175
1053	static void	1176	static int
1054	api_cede (void)	1177	api_cede (void)
1055	{	1178	{
		1179	dTHX;
1056	struct transfer_args ta;	1180	struct transfer_args ta;
1057		1181
1058	prepare_cede (&ta);	1182	prepare_cede (aTHX_ &ta);
		1183
		1184	if (ta.prev != ta.next)
		1185	{
1059	TRANSFER (ta);	1186	TRANSFER (ta);
		1187	return 1;
		1188	}
		1189	else
		1190	return 0;
		1191	}
		1192
		1193	static int
		1194	api_cede_notself (void)
		1195	{
		1196	dTHX;
		1197	struct transfer_args ta;
		1198
		1199	if (prepare_cede_notself (aTHX_ &ta))
		1200	{
		1201	TRANSFER (ta);
		1202	return 1;
		1203	}
		1204	else
		1205	return 0;
1060	}	1206	}
1061		1207
1062	MODULE = Coro::State PACKAGE = Coro::State	1208	MODULE = Coro::State PACKAGE = Coro::State
1063		1209
1064	PROTOTYPES: DISABLE	1210	PROTOTYPES: DISABLE
…		…
1074		1220
1075	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1076	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1077	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));	1223	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1078	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));	1224	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1225	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1226	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1079	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1227	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1080		1228
1081	main_mainstack = PL_mainstack;	1229	main_mainstack = PL_mainstack;
		1230	main_top_env = PL_top_env;
		1231
		1232	while (main_top_env->je_prev)
		1233	main_top_env = main_top_env->je_prev;
1082		1234
1083	coroapi.ver = CORO_API_VERSION;	1235	coroapi.ver = CORO_API_VERSION;
1084	coroapi.transfer = api_transfer;	1236	coroapi.transfer = api_transfer;
1085		1237
1086	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1238	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1094	HV *hv;	1246	HV *hv;
1095	int i;	1247	int i;
1096		1248
1097	Newz (0, coro, 1, struct coro);	1249	Newz (0, coro, 1, struct coro);
1098	coro->args = newAV ();	1250	coro->args = newAV ();
1099	coro->save = CORO_SAVE_ALL;	1251	coro->save = CORO_SAVE_DEF;
1100	coro->flags = CF_NEW;	1252	coro->flags = CF_NEW;
1101		1253
		1254	if (coro_first) coro_first->prev = coro;
		1255	coro->next = coro_first;
		1256	coro_first = coro;
		1257
1102	hv = newHV ();	1258	coro->hv = hv = newHV ();
1103	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1259	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));	1260	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1105		1261
1106	for (i = 1; i < items; i++)	1262	for (i = 1; i < items; i++)
1107	av_push (coro->args, newSVsv (ST (i)));	1263	av_push (coro->args, newSVsv (ST (i)));
…		…
1114	CODE:	1270	CODE:
1115	RETVAL = api_save (coro, new_save);	1271	RETVAL = api_save (coro, new_save);
1116	OUTPUT:	1272	OUTPUT:
1117	RETVAL	1273	RETVAL
1118		1274
		1275	int
		1276	save_also (SV *coro_sv, int save_also)
		1277	CODE:
		1278	{
		1279	struct coro *coro = SvSTATE (coro_sv);
		1280	RETVAL = coro->save;
		1281	coro->save |= save_also;
		1282	}
		1283	OUTPUT:
		1284	RETVAL
		1285
1119	void	1286	void
1120	_set_stacklevel (...)	1287	_set_stacklevel (...)
1121	ALIAS:	1288	ALIAS:
1122	Coro::State::transfer = 1	1289	Coro::State::transfer = 1
1123	Coro::schedule = 2	1290	Coro::schedule = 2
1124	Coro::cede = 3	1291	Coro::cede = 3
		1292	Coro::cede_notself = 4
1125	CODE:	1293	CODE:
1126	{	1294	{
1127	struct transfer_args ta;	1295	struct transfer_args ta;
1128		1296
1129	switch (ix)	1297	switch (ix)
…		…
1135		1303
1136	case 1:	1304	case 1:
1137	if (items != 2)	1305	if (items != 2)
1138	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1306	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1139		1307
1140	prepare_transfer (&ta, ST (0), ST (1));	1308	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1141	break;	1309	break;
1142		1310
1143	case 2:	1311	case 2:
1144	prepare_schedule (&ta);	1312	prepare_schedule (aTHX_ &ta);
1145	break;	1313	break;
1146		1314
1147	case 3:	1315	case 3:
1148	prepare_cede (&ta);	1316	prepare_cede (aTHX_ &ta);
		1317	break;
		1318
		1319	case 4:
		1320	if (!prepare_cede_notself (aTHX_ &ta))
		1321	XSRETURN_EMPTY;
		1322
1149	break;	1323	break;
1150	}	1324	}
1151		1325
		1326	BARRIER;
1152	TRANSFER (ta);	1327	TRANSFER (ta);
1153	}
1154		1328
1155	void	1329	if (GIMME_V != G_VOID && ta.next != ta.prev)
1156	_clone_state_from (SV *dst, SV *src)	1330	XSRETURN_YES;
		1331	}
		1332
		1333	bool
		1334	_destroy (SV *coro_sv)
1157	CODE:	1335	CODE:
1158	{	1336	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1159	struct coro *coro_src = SvSTATE (src);	1337	OUTPUT:
1160		1338	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		1339
1167	void	1340	void
1168	_exit (code)	1341	_exit (code)
1169	int code	1342	int code
1170	PROTOTYPE: $	1343	PROTOTYPE: $
1171	CODE:	1344	CODE:
1172	_exit (code);	1345	_exit (code);
1173		1346
1174	int	1347	int
		1348	cctx_stacksize (int new_stacksize = 0)
		1349	CODE:
		1350	RETVAL = coro_stacksize;
		1351	if (new_stacksize)
		1352	coro_stacksize = new_stacksize;
		1353	OUTPUT:
		1354	RETVAL
		1355
		1356	int
1175	cctx_count ()	1357	cctx_count ()
1176	CODE:	1358	CODE:
1177	RETVAL = cctx_count;	1359	RETVAL = cctx_count;
1178	OUTPUT:	1360	OUTPUT:
1179	RETVAL	1361	RETVAL
…		…
1183	CODE:	1365	CODE:
1184	RETVAL = cctx_idle;	1366	RETVAL = cctx_idle;
1185	OUTPUT:	1367	OUTPUT:
1186	RETVAL	1368	RETVAL
1187		1369
		1370	void
		1371	list ()
		1372	PPCODE:
		1373	{
		1374	struct coro *coro;
		1375	for (coro = coro_first; coro; coro = coro->next)
		1376	if (coro->hv)
		1377	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1378	}
		1379
		1380	void
		1381	_eval (Coro::State coro, SV *coderef)
		1382	CODE:
		1383	{
		1384	if (coro->mainstack)
		1385	{
		1386	struct coro temp;
		1387	Zero (&temp, 1, struct coro);
		1388	temp.save = CORO_SAVE_ALL;
		1389
		1390	if (!(coro->flags & CF_RUNNING))
		1391	{
		1392	save_perl (aTHX_ &temp);
		1393	load_perl (aTHX_ coro);
		1394	}
		1395
		1396	{
		1397	dSP;
		1398	ENTER;
		1399	SAVETMPS;
		1400	PUSHMARK (SP);
		1401	PUTBACK;
		1402	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1403	SPAGAIN;
		1404	FREETMPS;
		1405	LEAVE;
		1406	PUTBACK;
		1407	}
		1408
		1409	if (!(coro->flags & CF_RUNNING))
		1410	{
		1411	save_perl (aTHX_ coro);
		1412	load_perl (aTHX_ &temp);
		1413	}
		1414	}
		1415	}
		1416
		1417	SV *
		1418	is_ready (Coro::State coro)
		1419	PROTOTYPE: $
		1420	ALIAS:
		1421	is_ready = CF_READY
		1422	is_running = CF_RUNNING
		1423	is_new = CF_NEW
		1424	is_destroyed = CF_DESTROYED
		1425	CODE:
		1426	RETVAL = boolSV (coro->flags & ix);
		1427	OUTPUT:
		1428	RETVAL
		1429
		1430	IV
		1431	rss (Coro::State coro)
		1432	PROTOTYPE: $
		1433	CODE:
		1434	RETVAL = coro_rss (coro);
		1435	OUTPUT:
		1436	RETVAL
		1437
		1438
1188	MODULE = Coro::State PACKAGE = Coro	1439	MODULE = Coro::State PACKAGE = Coro
1189		1440
1190	BOOT:	1441	BOOT:
1191	{	1442	{
1192	int i;	1443	int i;
…		…
1207	coro_ready[i] = newAV ();	1458	coro_ready[i] = newAV ();
1208		1459
1209	{	1460	{
1210	SV *sv = perl_get_sv("Coro::API", 1);	1461	SV *sv = perl_get_sv("Coro::API", 1);
1211		1462
1212	coroapi.schedule = api_schedule;	1463	coroapi.schedule = api_schedule;
1213	coroapi.save = api_save;	1464	coroapi.save = api_save;
1214	coroapi.cede = api_cede;	1465	coroapi.cede = api_cede;
		1466	coroapi.cede_notself = api_cede_notself;
1215	coroapi.ready = api_ready;	1467	coroapi.ready = api_ready;
1216	coroapi.is_ready = api_is_ready;	1468	coroapi.is_ready = api_is_ready;
1217	coroapi.nready = &coro_nready;	1469	coroapi.nready = &coro_nready;
1218	coroapi.current = coro_current;	1470	coroapi.current = coro_current;
1219		1471
1220	GCoroAPI = &coroapi;	1472	GCoroAPI = &coroapi;
1221	sv_setiv (sv, (IV)&coroapi);	1473	sv_setiv (sv, (IV)&coroapi);
1222	SvREADONLY_on (sv);	1474	SvREADONLY_on (sv);
1223	}	1475	}
…		…
1239	RETVAL = coro->prio;	1491	RETVAL = coro->prio;
1240		1492
1241	if (items > 1)	1493	if (items > 1)
1242	{	1494	{
1243	if (ix)	1495	if (ix)
1244	newprio += coro->prio;	1496	newprio = coro->prio - newprio;
1245		1497
1246	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1498	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1247	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1499	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1248		1500
1249	coro->prio = newprio;	1501	coro->prio = newprio;
1250	}	1502	}
1251	}	1503	}
		1504	OUTPUT:
		1505	RETVAL
1252		1506
1253	SV *	1507	SV *
1254	ready (SV *self)	1508	ready (SV *self)
1255	PROTOTYPE: $	1509	PROTOTYPE: $
1256	CODE:	1510	CODE:
1257	RETVAL = boolSV (api_ready (self));	1511	RETVAL = boolSV (api_ready (self));
1258	OUTPUT:	1512	OUTPUT:
1259	RETVAL	1513	RETVAL
1260		1514
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	1515	int
1270	nready (...)	1516	nready (...)
1271	PROTOTYPE:	1517	PROTOTYPE:
1272	CODE:	1518	CODE:
1273	RETVAL = coro_nready;	1519	RETVAL = coro_nready;

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