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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC vs.
Revision 1.152 by root, Thu Sep 20 12:02:25 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		37
		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
77	/* 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
78	* 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
79	* and should be unique. */	95	* and should be unique. */
80	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
82		98
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		100
85	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
87	#else	104	#else
88	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
89	#endif	107	#endif
90		108
91	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
92		110
93	#include "CoroAPI.h"	111	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		112
97	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	117	#else
102	# define LOCK (void)0	118	# define LOCK (void)0
103	# define UNLOCK (void)0	119	# define UNLOCK (void)0
104	#endif	120	#endif
105		121
		122	/* helper storage struct for Coro::AIO */
106	struct io_state	123	struct io_state
107	{	124	{
108	int errorno;	125	int errorno;
109	I32 laststype;	126	I32 laststype;
110	int laststatval;	127	int laststatval;
111	Stat_t statcache;	128	Stat_t statcache;
112	};	129	};
113		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
114	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
115	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;
116	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
117	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
118		137
119	static struct coro_cctx *cctx_first;	138	static struct coro_cctx *cctx_first;
120	static int cctx_count, cctx_idle;	139	static int cctx_count, cctx_idle;
…		…
123	typedef struct coro_cctx {	142	typedef struct coro_cctx {
124	struct coro_cctx *next;	143	struct coro_cctx *next;
125		144
126	/* the stack */	145	/* the stack */
127	void *sptr;	146	void *sptr;
128	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
129		148
130	/* cpu state */	149	/* cpu state */
131	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 */
132	JMPENV *top_env;	152	JMPENV *top_env;
133	coro_context cctx;	153	coro_context cctx;
134		154
135	int inuse;
136
137	#if USE_VALGRIND	155	#if CORO_USE_VALGRIND
138	int valgrind_id;	156	int valgrind_id;
139	#endif	157	#endif
		158	char inuse, mapped;
140	} coro_cctx;	159	} coro_cctx;
141		160
142	enum {	161	enum {
143	CF_RUNNING = 0x0001, /* coroutine is running */	162	CF_RUNNING = 0x0001, /* coroutine is running */
144	CF_READY = 0x0002, /* coroutine is ready */	163	CF_READY = 0x0002, /* coroutine is ready */
145	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 */
146	};	166	};
147		167
148	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
149	struct coro {	169	struct coro {
150	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
151	coro_cctx *cctx;	171	coro_cctx *cctx;
152		172
153	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
154	AV *args;	174	AV *args;
155	int refcnt;	175	int refcnt;
156	int flags;	176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
157		178
158	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
159	AV *defav;	180	AV *defav; /* @_ */
160	SV *defsv;	181	SV *defsv; /* $_ */
161	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
162		186
163	#define VAR(name,type) type name;	187	#define VAR(name,type) type name;
164	# include "state.h"	188	# include "state.h"
165	#undef VAR	189	#undef VAR
166		190
167	/* coro process data */	191	/* coro process data */
168	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 */
169	};	197	};
170		198
171	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
172	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
173		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 *first;
		216
		217	/** lowlevel stuff **********************************************************/
		218
174	static AV *	219	static AV *
175	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
176	{	221	{
177	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
178	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
179		224
180	newpadlist = newAV ();	225	newpadlist = newAV ();
…		…
192		237
193	return newpadlist;	238	return newpadlist;
194	}	239	}
195		240
196	static void	241	static void
197	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
198	{	243	{
199	/* may be during global destruction */	244	/* may be during global destruction */
200	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
201	{	246	{
202	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
223	AV *padlist;	268	AV *padlist;
224	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
225		270
226	/* casting is fun. */	271	/* casting is fun. */
227	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
228	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
229		274
230	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
231		276
232	return 0;	277	return 0;
233	}	278	}
…		…
243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
244	: 0	289	: 0
245		290
246	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
247	static void	292	static void
248	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
249	{	294	{
250	MAGIC *mg = CORO_MAGIC (cv);	295	MAGIC *mg = CORO_MAGIC (cv);
251	AV *av;	296	AV *av;
252		297
253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
255	else	300	else
256	{	301	{
257	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
258	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
259	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
260	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
261	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
262	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
263	#else	308	#else
264	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
265	#endif	310	#endif
266	}	311	}
267	}	312	}
268		313
269	static void	314	static void
270	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
271	{	316	{
272	MAGIC *mg = CORO_MAGIC (cv);	317	MAGIC *mg = CORO_MAGIC (cv);
273	AV *av;	318	AV *av;
274		319
275	if (!mg)	320	if (!mg)
…		…
286	av_extend (av, AvMAX (av) + 1);	331	av_extend (av, AvMAX (av) + 1);
287		332
288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
289	}	334	}
290		335
		336	/** load & save, init *******************************************************/
		337
291	#define SB do {	338	#define SB do {
292	#define SE } while (0)	339	#define SE } while (0)
293		340
294	#define LOAD(state) load_state ((state))
295	#define SAVE(state,flags) save_state ((state),(flags))
296
297	#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
298		342
299	static void	343	static void
300	load_state (Coro__State c)	344	load_perl (pTHX_ Coro__State c)
301	{	345	{
302	#define VAR(name,type) PL_ ## name = c->name;	346	#define VAR(name,type) PL_ ## name = c->name;
303	# include "state.h"	347	# include "state.h"
304	#undef VAR	348	#undef VAR
305		349
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	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
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
309		369
310	{	370	{
311	dSP;	371	dSP;
312	CV *cv;	372	CV *cv;
313		373
314	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
316	{	376	{
317	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
318	CvDEPTH (cv) = PTR2IV (POPs);	378	CvDEPTH (cv) = PTR2IV (POPs);
319	CvPADLIST (cv) = (AV *)POPs;	379	CvPADLIST (cv) = (AV *)POPs;
320	}	380	}
321		381
322	PUTBACK;	382	PUTBACK;
323	}	383	}
324	}	384	}
325		385
326	static void	386	static void
327	save_state (Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
328	{	388	{
329	{	389	{
330	dSP;	390	dSP;
331	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
332	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
335	/*	395	/*
336	* 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
337	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
338	*/	398	*/
339		399
		400	EXTEND (SP, 3 + 1);
340	PUSHs (Nullsv);	401	PUSHs (Nullsv);
341	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
342	for (;;)	403	for (;;)
343	{	404	{
344	while (cxix >= 0)	405	while (cxix >= 0)
345	{	406	{
346	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
347		408
348	if (CxTYPE (cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
349	{	410	{
350	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
351		412
352	if (CvDEPTH (cv))	413	if (CvDEPTH (cv))
353	{	414	{
354	EXTEND (SP, 3);	415	EXTEND (SP, 3);
355
356	PUSHs ((SV *)CvPADLIST (cv));	416	PUSHs ((SV *)CvPADLIST (cv));
357	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
358	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
359		419
360	CvDEPTH (cv) = 0;	420	CvDEPTH (cv) = 0;
361	get_padlist (cv);	421	get_padlist (aTHX_ cv);
362	}	422	}
363	}	423	}
364	#ifdef CXt_FORMAT
365	else if (CxTYPE (cx) == CXt_FORMAT)
366	{
367	/* I never used formats, so how should I know how these are implemented? */
368	/* my bold guess is as a simple, plain sub... */
369	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
370	}
371	#endif
372	}	424	}
373		425
374	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
375	break;	427	break;
376		428
…		…
380	}	432	}
381		433
382	PUTBACK;	434	PUTBACK;
383	}	435	}
384		436
385	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
386	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
387	c->errsv = flags & TRANSFER_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;
		441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
388		442
389	#define VAR(name,type)c->name = PL_ ## name;	443	#define VAR(name,type)c->name = PL_ ## name;
390	# include "state.h"	444	# include "state.h"
391	#undef VAR	445	#undef VAR
392	}	446	}
…		…
395	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
396	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
397	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
398	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
399	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
400	static void	457	static void
401	coro_init_stacks ()	458	coro_init_stacks (pTHX)
402	{	459	{
403	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
404	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
405	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
406	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
434	New(54,PL_retstack,16,OP*);	491	New(54,PL_retstack,16,OP*);
435	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
436	PL_retstack_max = 16;	493	PL_retstack_max = 16;
437	#endif	494	#endif
438	}	495	}
		496	#endif
439		497
440	/*	498	/*
441	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
442	*/	500	*/
443	static void	501	static void
444	coro_destroy_stacks ()	502	coro_destroy_stacks (pTHX)
445	{	503	{
446	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
447	{	505	{
448	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
449	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
450		509
451	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
452	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
453		513
		514	/* unwind all extra stacks */
454	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
455	}	519	}
456		520
457	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
458	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
459		523
460	while (PL_curstackinfo)	524	while (PL_curstackinfo)
461	{	525	{
462	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
463		527
464	{ /*D*//*remove*/
465	dSP;
466	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
467	PUTBACK; /* possibly superfluous */
468	}
469
470	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
471	{
472	dounwind (-1);/*D*//*remove*/
473	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
474	}
475		530
476	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
477	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
478	PL_curstackinfo = p;	533	PL_curstackinfo = p;
479	}	534	}
…		…
485	#if !PERL_VERSION_ATLEAST (5,9,0)	540	#if !PERL_VERSION_ATLEAST (5,9,0)
486	Safefree (PL_retstack);	541	Safefree (PL_retstack);
487	#endif	542	#endif
488	}	543	}
489		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	rss += sizeof (coro->curstackinfo);
		553	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		554	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		555
		556	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		557
		558	rss += coro->tmps_max * sizeof (SV *);
		559
		560	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		561
		562	rss += coro->scopestack_max * sizeof (I32);
		563
		564	rss += coro->savestack_max * sizeof (ANY);
		565
		566	#if !PERL_VERSION_ATLEAST (5,9,0)
		567	rss += coro->retstack_max * sizeof (OP *);
		568	#endif
		569	}
		570
		571	return rss;
		572	}
		573
		574	/** coroutine stack handling ************************************************/
		575
490	static void	576	static void
491	setup_coro (struct coro *coro)	577	setup_coro (pTHX_ struct coro *coro)
492	{	578	{
493	/*	579	/*
494	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
495	*/	581	*/
496
497	coro_init_stacks ();	582	coro_init_stacks (aTHX);
498		583
499	PL_curcop = &PL_compiling;	584	PL_curcop = &PL_compiling;
500	PL_in_eval = EVAL_NULL;	585	PL_in_eval = EVAL_NULL;
		586	PL_comppad = 0;
501	PL_curpm = 0;	587	PL_curpm = 0;
502	PL_localizing = 0;	588	PL_localizing = 0;
503	PL_dirty = 0;	589	PL_dirty = 0;
504	PL_restartop = 0;	590	PL_restartop = 0;
505		591
…		…
513	Zero (&myop, 1, LOGOP);	599	Zero (&myop, 1, LOGOP);
514	myop.op_next = Nullop;	600	myop.op_next = Nullop;
515	myop.op_flags = OPf_WANT_VOID;	601	myop.op_flags = OPf_WANT_VOID;
516		602
517	PUSHMARK (SP);	603	PUSHMARK (SP);
518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	604	XPUSHs (av_shift (GvAV (PL_defgv)));
519	PUTBACK;	605	PUTBACK;
520	PL_op = (OP *)&myop;	606	PL_op = (OP *)&myop;
521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
522	SPAGAIN;	608	SPAGAIN;
523	}	609	}
524		610
525	ENTER; /* necessary e.g. for dounwind */	611	ENTER; /* necessary e.g. for dounwind */
526	}	612	}
527		613
528	static void	614	static void
529	free_coro_mortal ()	615	free_coro_mortal (pTHX)
530	{	616	{
531	if (coro_mortal)	617	if (coro_mortal)
532	{	618	{
533	SvREFCNT_dec (coro_mortal);	619	SvREFCNT_dec (coro_mortal);
534	coro_mortal = 0;	620	coro_mortal = 0;
535	}	621	}
536	}	622	}
537		623
538	/* inject a fake call to Coro::State::_cctx_init into the execution */	624	/* inject a fake call to Coro::State::_cctx_init into the execution */
		625	/* _cctx_init should be careful, as it could be called at almost any time */
		626	/* during execution of a perl program */
539	static void NOINLINE	627	static void NOINLINE
540	prepare_cctx (coro_cctx *cctx)	628	prepare_cctx (pTHX_ coro_cctx *cctx)
541	{	629	{
542	dSP;	630	dSP;
543	LOGOP myop;	631	LOGOP myop;
544		632
545	Zero (&myop, 1, LOGOP);	633	Zero (&myop, 1, LOGOP);
…		…
554	PL_op = (OP *)&myop;	642	PL_op = (OP *)&myop;
555	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
556	SPAGAIN;	644	SPAGAIN;
557	}	645	}
558		646
		647	/*
		648	* this is a _very_ stripped down perl interpreter ;)
		649	*/
559	static void	650	static void
560	coro_run (void *arg)	651	coro_run (void *arg)
561	{	652	{
		653	dTHX;
		654
562	/* coro_run is the alternative tail of transfer(), so unlock here. */	655	/* coro_run is the alternative tail of transfer(), so unlock here. */
563	UNLOCK;	656	UNLOCK;
564		657
565	/*
566	* this is a _very_ stripped down perl interpreter ;)
567	*/
568	PL_top_env = &PL_start_env;	658	PL_top_env = &PL_start_env;
569		659
570	/* inject call to cctx_init */	660	/* inject a fake subroutine call to cctx_init */
571	prepare_cctx ((coro_cctx *)arg);	661	prepare_cctx (aTHX_ (coro_cctx *)arg);
572		662
573	/* somebody will hit me for both perl_run and PL_restartop */	663	/* somebody or something will hit me for both perl_run and PL_restartop */
574	PL_restartop = PL_op;	664	PL_restartop = PL_op;
575	perl_run (PL_curinterp);	665	perl_run (PL_curinterp);
576		666
577	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	667	/*
578	abort ();	668	* If perl-run returns we assume exit() was being called or the coro
		669	* fell off the end, which seems to be the only valid (non-bug)
		670	* reason for perl_run to return. We try to exit by jumping to the
		671	* bootstrap-time "top" top_env, as we cannot restore the "main"
		672	* coroutine as Coro has no such concept
		673	*/
		674	PL_top_env = main_top_env;
		675	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
579	}	676	}
580		677
581	static coro_cctx *	678	static coro_cctx *
582	cctx_new ()	679	cctx_new ()
583	{	680	{
584	coro_cctx *cctx;	681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
585		684
586	++cctx_count;	685	++cctx_count;
587		686
588	New (0, cctx, 1, coro_cctx);	687	Newz (0, cctx, 1, coro_cctx);
589		688
590	#if HAVE_MMAP	689	#if HAVE_MMAP
591		690
592	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
593	/* mmap supposedly does allocate-on-write for us */	692	/* mmap supposedly does allocate-on-write for us */
594	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
595		694
596	if (cctx->sptr == (void *)-1)	695	if (cctx->sptr != (void *)-1)
597	{
598	perror ("FATAL: unable to mmap stack for coroutine");
599	_exit (EXIT_FAILURE);
600	}	696	{
601
602	# if STACKGUARD	697	# if CORO_STACKGUARD
603	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
604	# endif	699	# endif
		700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		702	cctx->mapped = 1;
		703	}
		704	else
		705	#endif
		706	{
		707	cctx->ssize = coro_stacksize * (long)sizeof (long);
		708	New (0, cctx->sptr, coro_stacksize, long);
605		709
606	#else
607
608	cctx->ssize = STACKSIZE * (long)sizeof (long);
609	New (0, cctx->sptr, STACKSIZE, long);
610
611	if (!cctx->sptr)	710	if (!cctx->sptr)
612	{	711	{
613	perror ("FATAL: unable to malloc stack for coroutine");	712	perror ("FATAL: unable to allocate stack for coroutine");
614	_exit (EXIT_FAILURE);	713	_exit (EXIT_FAILURE);
615	}	714	}
616		715
617	#endif	716	stack_start = cctx->sptr;
		717	stack_size = cctx->ssize;
		718	}
618		719
619	#if USE_VALGRIND	720	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
620	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
621	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
622	cctx->ssize + (char *)cctx->sptr
623	);
624	#endif
625
626	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
627		722
628	return cctx;	723	return cctx;
629	}	724	}
630		725
631	static void	726	static void
…		…
634	if (!cctx)	729	if (!cctx)
635	return;	730	return;
636		731
637	--cctx_count;	732	--cctx_count;
638		733
639	#if USE_VALGRIND	734	#if CORO_USE_VALGRIND
640	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
641	#endif	736	#endif
642		737
643	#if HAVE_MMAP	738	#if HAVE_MMAP
		739	if (cctx->mapped)
644	munmap (cctx->sptr, cctx->ssize);	740	munmap (cctx->sptr, cctx->ssize);
645	#else	741	else
		742	#endif
646	Safefree (cctx->sptr);	743	Safefree (cctx->sptr);
647	#endif
648		744
649	Safefree (cctx);	745	Safefree (cctx);
650	}	746	}
651		747
652	static coro_cctx *	748	static coro_cctx *
653	cctx_get ()	749	cctx_get (pTHX)
654	{	750	{
655	coro_cctx *cctx;
656
657	if (cctx_first)	751	while (cctx_first)
658	{	752	{
659	cctx = cctx_first;	753	coro_cctx *cctx = cctx_first;
660	cctx_first = cctx->next;	754	cctx_first = cctx->next;
661	--cctx_idle;	755	--cctx_idle;
		756
		757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
662	}	761	}
663	else	762
664	{
665	cctx = cctx_new ();
666	PL_op = PL_op->op_next;	763	PL_op = PL_op->op_next;
667	}
668
669	return cctx;	764	return cctx_new ();
670	}	765	}
671		766
672	static void	767	static void
673	cctx_put (coro_cctx *cctx)	768	cctx_put (coro_cctx *cctx)
674	{	769	{
…		…
686	++cctx_idle;	781	++cctx_idle;
687	cctx->next = cctx_first;	782	cctx->next = cctx_first;
688	cctx_first = cctx;	783	cctx_first = cctx;
689	}	784	}
690		785
		786	/** coroutine switching *****************************************************/
		787
691	/* never call directly, always through the coro_state_transfer global variable */	788	/* never call directly, always through the coro_state_transfer global variable */
692	static void NOINLINE	789	static void NOINLINE
693	transfer (struct coro *prev, struct coro *next, int flags)	790	transfer (pTHX_ struct coro *prev, struct coro *next)
694	{	791	{
695	dSTACKLEVEL;	792	dSTACKLEVEL;
696		793
697	/* sometimes transfer is only called to set idle_sp */	794	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	795	if (!next)
		796	{
699	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		798	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		799	}
700	else if (prev != next)	800	else if (prev != next)
701	{	801	{
702	coro_cctx *prev__cctx;	802	coro_cctx *prev__cctx;
703		803
704	if (prev->flags & CF_NEW)	804	if (prev->flags & CF_NEW)
…		…
715	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
716		816
717	if (next->flags & CF_RUNNING)	817	if (next->flags & CF_RUNNING)
718	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
719		819
		820	if (next->flags & CF_DESTROYED)
		821	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		822
720	prev->flags &= ~CF_RUNNING;	823	prev->flags &= ~CF_RUNNING;
721	next->flags |= CF_RUNNING;	824	next->flags |= CF_RUNNING;
722		825
723	LOCK;	826	LOCK;
724		827
725	if (next->flags & CF_NEW)	828	if (next->flags & CF_NEW)
726	{	829	{
727	/* need to start coroutine */	830	/* need to start coroutine */
728	next->flags &= ~CF_NEW;	831	next->flags &= ~CF_NEW;
729	/* first get rid of the old state */	832	/* first get rid of the old state */
730	SAVE (prev, -1);	833	save_perl (aTHX_ prev);
731	/* setup coroutine call */	834	/* setup coroutine call */
732	setup_coro (next);	835	setup_coro (aTHX_ next);
733	/* need a new stack */	836	/* need a new stack */
734	assert (!next->stack);	837	assert (!next->cctx);
735	}	838	}
736	else	839	else
737	{	840	{
738	/* coroutine already started */	841	/* coroutine already started */
739	SAVE (prev, flags);	842	save_perl (aTHX_ prev);
740	LOAD (next);	843	load_perl (aTHX_ next);
741	}	844	}
742		845
743	prev__cctx = prev->cctx;	846	prev__cctx = prev->cctx;
744		847
745	/* possibly "free" the cctx */	848	/* possibly "free" the cctx */
746	if (prev__cctx->idle_sp == STACKLEVEL)	849	if (prev__cctx->idle_sp == STACKLEVEL)
747	{	850	{
748	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
749	assert (PL_top_env == prev__cctx->top_env);	852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
750		853
751	prev->cctx = 0;	854	prev->cctx = 0;
752		855
753	cctx_put (prev__cctx);	856	cctx_put (prev__cctx);
754	prev__cctx->inuse = 0;	857	prev__cctx->inuse = 0;
755	}	858	}
756		859
757	if (!next->cctx)	860	if (!next->cctx)
758	{	861	{
759	next->cctx = cctx_get ();	862	next->cctx = cctx_get (aTHX);
760	assert (!next->cctx->inuse);	863	assert (!next->cctx->inuse);
761	next->cctx->inuse = 1;	864	next->cctx->inuse = 1;
762	}	865	}
763		866
764	if (prev__cctx != next->cctx)	867	if (prev__cctx != next->cctx)
…		…
766	prev__cctx->top_env = PL_top_env;	869	prev__cctx->top_env = PL_top_env;
767	PL_top_env = next->cctx->top_env;	870	PL_top_env = next->cctx->top_env;
768	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
769	}	872	}
770		873
771	free_coro_mortal ();	874	free_coro_mortal (aTHX);
772
773	UNLOCK;	875	UNLOCK;
774	}	876	}
775	}	877	}
776		878
777	struct transfer_args	879	struct transfer_args
778	{	880	{
779	struct coro *prev, *next;	881	struct coro *prev, *next;
780	int flags;
781	};	882	};
782		883
783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
784		885
		886	/** high level stuff ********************************************************/
		887
785	static void	888	static int
786	coro_state_destroy (struct coro *coro)	889	coro_state_destroy (pTHX_ struct coro *coro)
787	{	890	{
788	if (coro->refcnt--)	891	if (coro->flags & CF_DESTROYED)
789	return;	892	return 0;
		893
		894	coro->flags |= CF_DESTROYED;
		895
		896	if (coro->flags & CF_READY)
		897	{
		898	/* reduce nready, as destroying a ready coro effectively unreadies it */
		899	/* alternative: look through all ready queues and remove the coro */
		900	LOCK;
		901	--coro_nready;
		902	UNLOCK;
		903	}
		904	else
		905	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		906
791	if (coro->mainstack && coro->mainstack != main_mainstack)	907	if (coro->mainstack && coro->mainstack != main_mainstack)
792	{	908	{
793	struct coro temp;	909	struct coro temp;
		910
		911	assert (!(coro->flags & CF_RUNNING));
		912
		913	Zero (&temp, 1, struct coro);
		914	temp.save = CORO_SAVE_ALL;
794		915
795	if (coro->flags & CF_RUNNING)	916	if (coro->flags & CF_RUNNING)
796	croak ("FATAL: tried to destroy currently running coroutine");	917	croak ("FATAL: tried to destroy currently running coroutine");
797		918
798	SAVE ((&temp), TRANSFER_SAVE_ALL);	919	save_perl (aTHX_ &temp);
799	LOAD (coro);	920	load_perl (aTHX_ coro);
800		921
801	coro_destroy_stacks ();	922	coro_destroy_stacks (aTHX);
802		923
803	LOAD ((&temp)); /* this will get rid of defsv etc.. */	924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
804		925
805	coro->mainstack = 0;	926	coro->mainstack = 0;
806	}	927	}
807		928
808	cctx_destroy (coro->cctx);	929	cctx_destroy (coro->cctx);
809	SvREFCNT_dec (coro->args);	930	SvREFCNT_dec (coro->args);
810	Safefree (coro);	931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == first) first = coro->next;
		935
		936	return 1;
811	}	937	}
812		938
813	static int	939	static int
814	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	940	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
815	{	941	{
816	struct coro *coro = (struct coro *)mg->mg_ptr;	942	struct coro *coro = (struct coro *)mg->mg_ptr;
817	mg->mg_ptr = 0;	943	mg->mg_ptr = 0;
818		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
819	coro_state_destroy (coro);	949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
820		952
821	return 0;	953	return 0;
822	}	954	}
823		955
824	static int	956	static int
…		…
831	return 0;	963	return 0;
832	}	964	}
833		965
834	static MGVTBL coro_state_vtbl = {	966	static MGVTBL coro_state_vtbl = {
835	0, 0, 0, 0,	967	0, 0, 0, 0,
836	coro_state_clear,	968	coro_state_free,
837	0,	969	0,
838	#ifdef MGf_DUP	970	#ifdef MGf_DUP
839	coro_state_dup,	971	coro_state_dup,
840	#else	972	#else
841	# define MGf_DUP 0	973	# define MGf_DUP 0
842	#endif	974	#endif
843	};	975	};
844		976
845	static struct coro *	977	static struct coro *
846	SvSTATE (SV *coro)	978	SvSTATE_ (pTHX_ SV *coro)
847	{	979	{
848	HV *stash;	980	HV *stash;
849	MAGIC *mg;	981	MAGIC *mg;
850		982
851	if (SvROK (coro))	983	if (SvROK (coro))
…		…
857	/* very slow, but rare, check */	989	/* very slow, but rare, check */
858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859	croak ("Coro::State object required");	991	croak ("Coro::State object required");
860	}	992	}
861		993
862	mg = SvMAGIC (coro);	994	mg = CORO_MAGIC (coro);
863	assert (mg->mg_type == PERL_MAGIC_ext);
864	return (struct coro *)mg->mg_ptr;	995	return (struct coro *)mg->mg_ptr;
865	}	996	}
866		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
867	static void	1000	static void
868	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1001	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
869	{	1002	{
870	ta->prev = SvSTATE (prev);	1003	ta->prev = SvSTATE (prev_sv);
871	ta->next = SvSTATE (next);	1004	ta->next = SvSTATE (next_sv);
872	ta->flags = flags;
873	}	1005	}
874		1006
875	static void	1007	static void
876	api_transfer (SV *prev, SV *next, int flags)	1008	api_transfer (SV *prev_sv, SV *next_sv)
877	{	1009	{
		1010	dTHX;
878	struct transfer_args ta;	1011	struct transfer_args ta;
879		1012
880	prepare_transfer (&ta, prev, next, flags);	1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	1014	TRANSFER (ta);
882	}	1015	}
883		1016
		1017	static int
		1018	api_save (SV *coro_sv, int new_save)
		1019	{
		1020	dTHX;
		1021	struct coro *coro = SvSTATE (coro_sv);
		1022	int old_save = coro->save;
		1023
		1024	if (new_save >= 0)
		1025	coro->save = new_save;
		1026
		1027	return old_save;
		1028	}
		1029
884	/** Coro ********************************************************************/	1030	/** Coro ********************************************************************/
885		1031
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static SV *coro_current;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	1032	static void
899	coro_enq (SV *coro_sv)	1033	coro_enq (pTHX_ SV *coro_sv)
900	{	1034	{
901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
902	coro_nready++;
903	}	1036	}
904		1037
905	static SV *	1038	static SV *
906	coro_deq (int min_prio)	1039	coro_deq (pTHX_ int min_prio)
907	{	1040	{
908	int prio = PRIO_MAX - PRIO_MIN;	1041	int prio = PRIO_MAX - PRIO_MIN;
909		1042
910	min_prio -= PRIO_MIN;	1043	min_prio -= PRIO_MIN;
911	if (min_prio < 0)	1044	if (min_prio < 0)
912	min_prio = 0;	1045	min_prio = 0;
913		1046
914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
915	if (AvFILLp (coro_ready [prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
916	{
917	coro_nready--;
918	return av_shift (coro_ready [prio]);	1049	return av_shift (coro_ready [prio]);
919	}
920		1050
921	return 0;	1051	return 0;
922	}	1052	}
923		1053
924	static int	1054	static int
925	api_ready (SV *coro_sv)	1055	api_ready (SV *coro_sv)
926	{	1056	{
		1057	dTHX;
927	struct coro *coro;	1058	struct coro *coro;
928		1059
929	if (SvROK (coro_sv))	1060	if (SvROK (coro_sv))
930	coro_sv = SvRV (coro_sv);	1061	coro_sv = SvRV (coro_sv);
931		1062
932	coro = SvSTATE (coro_sv);	1063	coro = SvSTATE (coro_sv);
933		1064
934	if (coro->flags & CF_READY)	1065	if (coro->flags & CF_READY)
935	return 0;	1066	return 0;
936		1067
937	#if 0 /* this is actually harmless */
938	if (coro->flags & CF_RUNNING)
939	croak ("Coro::ready called on currently running coroutine");
940	#endif
941
942	coro->flags |= CF_READY;	1068	coro->flags |= CF_READY;
943		1069
944	LOCK;	1070	LOCK;
945	coro_enq (SvREFCNT_inc (coro_sv));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1072	++coro_nready;
946	UNLOCK;	1073	UNLOCK;
947		1074
948	return 1;	1075	return 1;
949	}	1076	}
950		1077
951	static int	1078	static int
952	api_is_ready (SV *coro_sv)	1079	api_is_ready (SV *coro_sv)
953	{	1080	{
		1081	dTHX;
954	return !!SvSTATE (coro_sv)->flags & CF_READY;	1082	return !!(SvSTATE (coro_sv)->flags & CF_READY);
955	}	1083	}
956		1084
957	static void	1085	static void
958	prepare_schedule (struct transfer_args *ta)	1086	prepare_schedule (pTHX_ struct transfer_args *ta)
959	{	1087	{
960	SV *prev, *next;	1088	SV *prev_sv, *next_sv;
961		1089
962	for (;;)	1090	for (;;)
963	{	1091	{
964	LOCK;	1092	LOCK;
965	next = coro_deq (PRIO_MIN);	1093	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1094
		1095	/* nothing to schedule: call the idle handler */
		1096	if (!next_sv)
		1097	{
		1098	dSP;
		1099	UNLOCK;
		1100
		1101	ENTER;
		1102	SAVETMPS;
		1103
		1104	PUSHMARK (SP);
		1105	PUTBACK;
		1106	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1107
		1108	FREETMPS;
		1109	LEAVE;
		1110	continue;
		1111	}
		1112
		1113	ta->next = SvSTATE (next_sv);
		1114
		1115	/* cannot transfer to destroyed coros, skip and look for next */
		1116	if (ta->next->flags & CF_DESTROYED)
		1117	{
		1118	UNLOCK;
		1119	SvREFCNT_dec (next_sv);
		1120	/* coro_nready is already taken care of by destroy */
		1121	continue;
		1122	}
		1123
		1124	--coro_nready;
966	UNLOCK;	1125	UNLOCK;
967
968	if (next)
969	break;	1126	break;
970
971	{
972	dSP;
973
974	ENTER;
975	SAVETMPS;
976
977	PUSHMARK (SP);
978	PUTBACK;
979	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
980
981	FREETMPS;
982	LEAVE;
983	}	1127	}
984	}
985
986	prev = SvRV (coro_current);
987	SvRV_set (coro_current, next);
988		1128
989	/* free this only after the transfer */	1129	/* free this only after the transfer */
		1130	prev_sv = SvRV (coro_current);
		1131	SvRV_set (coro_current, next_sv);
		1132	ta->prev = SvSTATE (prev_sv);
		1133
		1134	assert (ta->next->flags & CF_READY);
		1135	ta->next->flags &= ~CF_READY;
		1136
990	LOCK;	1137	LOCK;
991	free_coro_mortal ();	1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
992	UNLOCK;	1140	UNLOCK;
993	coro_mortal = prev;
994
995	assert (!SvROK(prev));//D
996	assert (!SvROK(next));//D
997
998	ta->prev = SvSTATE (prev);
999	ta->next = SvSTATE (next);
1000	ta->flags = TRANSFER_SAVE_ALL;
1001
1002	assert (ta->flags & CF_READY);
1003	ta->next->flags &= ~CF_READY;
1004	}	1141	}
1005		1142
1006	static void	1143	static void
1007	prepare_cede (struct transfer_args *ta)	1144	prepare_cede (pTHX_ struct transfer_args *ta)
1008	{	1145	{
1009	api_ready (coro_current);	1146	api_ready (coro_current);
1010
1011	prepare_schedule (ta);	1147	prepare_schedule (aTHX_ ta);
		1148	}
		1149
		1150	static int
		1151	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1152	{
		1153	if (coro_nready)
		1154	{
		1155	SV *prev = SvRV (coro_current);
		1156	prepare_schedule (aTHX_ ta);
		1157	api_ready (prev);
		1158	return 1;
		1159	}
		1160	else
		1161	return 0;
1012	}	1162	}
1013		1163
1014	static void	1164	static void
1015	api_schedule (void)	1165	api_schedule (void)
1016	{	1166	{
		1167	dTHX;
1017	struct transfer_args ta;	1168	struct transfer_args ta;
1018		1169
1019	prepare_schedule (&ta);	1170	prepare_schedule (aTHX_ &ta);
1020	TRANSFER (ta);	1171	TRANSFER (ta);
1021	}	1172	}
1022		1173
1023	static void	1174	static int
1024	api_cede (void)	1175	api_cede (void)
1025	{	1176	{
		1177	dTHX;
1026	struct transfer_args ta;	1178	struct transfer_args ta;
1027		1179
1028	prepare_cede (&ta);	1180	prepare_cede (aTHX_ &ta);
		1181
		1182	if (ta.prev != ta.next)
		1183	{
1029	TRANSFER (ta);	1184	TRANSFER (ta);
		1185	return 1;
		1186	}
		1187	else
		1188	return 0;
		1189	}
		1190
		1191	static int
		1192	api_cede_notself (void)
		1193	{
		1194	dTHX;
		1195	struct transfer_args ta;
		1196
		1197	if (prepare_cede_notself (aTHX_ &ta))
		1198	{
		1199	TRANSFER (ta);
		1200	return 1;
		1201	}
		1202	else
		1203	return 0;
1030	}	1204	}
1031		1205
1032	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
1033		1207
1034	PROTOTYPES: DISABLE	1208	PROTOTYPES: DISABLE
…		…
1040	#endif	1214	#endif
1041	BOOT_PAGESIZE;	1215	BOOT_PAGESIZE;
1042		1216
1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1044		1218
1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1222	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1048		1226
1049	main_mainstack = PL_mainstack;	1227	main_mainstack = PL_mainstack;
		1228	main_top_env = PL_top_env;
		1229
		1230	while (main_top_env->je_prev)
		1231	main_top_env = main_top_env->je_prev;
1050		1232
1051	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
1052	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
1053		1235
1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1062	HV *hv;	1244	HV *hv;
1063	int i;	1245	int i;
1064		1246
1065	Newz (0, coro, 1, struct coro);	1247	Newz (0, coro, 1, struct coro);
1066	coro->args = newAV ();	1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
1067	coro->flags = CF_NEW;	1250	coro->flags = CF_NEW;
1068		1251
		1252	if (first) first->prev = coro;
		1253	coro->next = first;
		1254	first = coro;
		1255
1069	hv = newHV ();	1256	coro->hv = hv = newHV ();
1070	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1257	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1071	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1072		1259
1073	for (i = 1; i < items; i++)	1260	for (i = 1; i < items; i++)
1074	av_push (coro->args, newSVsv (ST (i)));	1261	av_push (coro->args, newSVsv (ST (i)));
1075	}	1262	}
1076	OUTPUT:	1263	OUTPUT:
		1264	RETVAL
		1265
		1266	int
		1267	save (SV *coro, int new_save = -1)
		1268	CODE:
		1269	RETVAL = api_save (coro, new_save);
		1270	OUTPUT:
		1271	RETVAL
		1272
		1273	int
		1274	save_also (SV *coro_sv, int save_also)
		1275	CODE:
		1276	{
		1277	struct coro *coro = SvSTATE (coro_sv);
		1278	RETVAL = coro->save;
		1279	coro->save |= save_also;
		1280	}
		1281	OUTPUT:
1077	RETVAL	1282	RETVAL
1078		1283
1079	void	1284	void
1080	_set_stacklevel (...)	1285	_set_stacklevel (...)
1081	ALIAS:	1286	ALIAS:
1082	Coro::State::transfer = 1	1287	Coro::State::transfer = 1
1083	Coro::schedule = 2	1288	Coro::schedule = 2
1084	Coro::cede = 3	1289	Coro::cede = 3
		1290	Coro::cede_notself = 4
1085	CODE:	1291	CODE:
1086	{	1292	{
1087	struct transfer_args ta;	1293	struct transfer_args ta;
1088		1294
1089	switch (ix)	1295	switch (ix)
1090	{	1296	{
1091	case 0:	1297	case 0:
1092	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1093	ta.next = 0;	1299	ta.next = 0;
1094	ta.flags = TRANSFER_SET_STACKLEVEL;
1095	break;	1300	break;
1096		1301
1097	case 1:	1302	case 1:
1098	if (items != 3)	1303	if (items != 2)
1099	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1304	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1100		1305
1101	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1102	break;	1307	break;
1103		1308
1104	case 2:	1309	case 2:
1105	prepare_schedule (&ta);	1310	prepare_schedule (aTHX_ &ta);
1106	break;	1311	break;
1107		1312
1108	case 3:	1313	case 3:
1109	prepare_cede (&ta);	1314	prepare_cede (aTHX_ &ta);
		1315	break;
		1316
		1317	case 4:
		1318	if (!prepare_cede_notself (aTHX_ &ta))
		1319	XSRETURN_EMPTY;
		1320
1110	break;	1321	break;
1111	}	1322	}
1112		1323
		1324	BARRIER;
1113	TRANSFER (ta);	1325	TRANSFER (ta);
1114	}
1115		1326
1116	void	1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
1117	_clone_state_from (SV *dst, SV *src)	1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
1118	CODE:	1333	CODE:
1119	{	1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1120	struct coro *coro_src = SvSTATE (src);	1335	OUTPUT:
1121		1336	RETVAL
1122	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1123
1124	++coro_src->refcnt;
1125	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1126	}
1127		1337
1128	void	1338	void
1129	_exit (code)	1339	_exit (code)
1130	int code	1340	int code
1131	PROTOTYPE: $	1341	PROTOTYPE: $
1132	CODE:	1342	CODE:
1133	_exit (code);	1343	_exit (code);
1134		1344
1135	int	1345	int
		1346	cctx_stacksize (int new_stacksize = 0)
		1347	CODE:
		1348	RETVAL = coro_stacksize;
		1349	if (new_stacksize)
		1350	coro_stacksize = new_stacksize;
		1351	OUTPUT:
		1352	RETVAL
		1353
		1354	int
1136	cctx_count ()	1355	cctx_count ()
1137	CODE:	1356	CODE:
1138	RETVAL = cctx_count;	1357	RETVAL = cctx_count;
1139	OUTPUT:	1358	OUTPUT:
1140	RETVAL	1359	RETVAL
…		…
1144	CODE:	1363	CODE:
1145	RETVAL = cctx_idle;	1364	RETVAL = cctx_idle;
1146	OUTPUT:	1365	OUTPUT:
1147	RETVAL	1366	RETVAL
1148		1367
		1368	void
		1369	list ()
		1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = first; coro; coro = coro->next)
		1374	if (coro->hv)
		1375	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1376	}
		1377
		1378	void
		1379	_eval (Coro::State coro, SV *coderef)
		1380	CODE:
		1381	{
		1382	if (coro->mainstack)
		1383	{
		1384	struct coro temp;
		1385	Zero (&temp, 1, struct coro);
		1386	temp.save = CORO_SAVE_ALL;
		1387
		1388	if (!(coro->flags & CF_RUNNING))
		1389	{
		1390	save_perl (aTHX_ &temp);
		1391	load_perl (aTHX_ coro);
		1392	}
		1393
		1394	{
		1395	dSP;
		1396	ENTER;
		1397	SAVETMPS;
		1398	PUSHMARK (SP);
		1399	PUTBACK;
		1400	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1401	SPAGAIN;
		1402	FREETMPS;
		1403	LEAVE;
		1404	PUTBACK;
		1405	}
		1406
		1407	if (!(coro->flags & CF_RUNNING))
		1408	{
		1409	save_perl (aTHX_ coro);
		1410	load_perl (aTHX_ &temp);
		1411	}
		1412	}
		1413	}
		1414
		1415	SV *
		1416	is_ready (Coro::State coro)
		1417	PROTOTYPE: $
		1418	ALIAS:
		1419	is_ready = CF_READY
		1420	is_running = CF_RUNNING
		1421	is_new = CF_NEW
		1422	is_destroyed = CF_DESTROYED
		1423	CODE:
		1424	RETVAL = boolSV (coro->flags & ix);
		1425	OUTPUT:
		1426	RETVAL
		1427
		1428	IV
		1429	rss (Coro::State coro)
		1430	PROTOTYPE: $
		1431	CODE:
		1432	RETVAL = coro_rss (coro);
		1433	OUTPUT:
		1434	RETVAL
		1435
		1436
1149	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1150		1438
1151	BOOT:	1439	BOOT:
1152	{	1440	{
1153	int i;	1441	int i;
…		…
1168	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1169		1457
1170	{	1458	{
1171	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1172		1460
1173	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
1174	coroapi.cede = api_cede;	1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1175	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
1176	coroapi.is_ready = api_is_ready;	1466	coroapi.is_ready = api_is_ready;
1177	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1178	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1179		1469
1180	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1181	sv_setiv (sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1182	SvREADONLY_on (sv);	1472	SvREADONLY_on (sv);
1183	}	1473	}
1184	}	1474	}
		1475
		1476	void
		1477	_set_current (SV *current)
		1478	PROTOTYPE: $
		1479	CODE:
		1480	SvREFCNT_dec (SvRV (coro_current));
		1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1185		1482
1186	int	1483	int
1187	prio (Coro::State coro, int newprio = 0)	1484	prio (Coro::State coro, int newprio = 0)
1188	ALIAS:	1485	ALIAS:
1189	nice = 1	1486	nice = 1
…		…
1192	RETVAL = coro->prio;	1489	RETVAL = coro->prio;
1193		1490
1194	if (items > 1)	1491	if (items > 1)
1195	{	1492	{
1196	if (ix)	1493	if (ix)
1197	newprio += coro->prio;	1494	newprio = coro->prio - newprio;
1198		1495
1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1201		1498
1202	coro->prio = newprio;	1499	coro->prio = newprio;
1203	}	1500	}
1204	}	1501	}
		1502	OUTPUT:
		1503	RETVAL
1205		1504
1206	SV *	1505	SV *
1207	ready (SV *self)	1506	ready (SV *self)
1208	PROTOTYPE: $	1507	PROTOTYPE: $
1209	CODE:	1508	CODE:
1210	RETVAL = boolSV (api_ready (self));	1509	RETVAL = boolSV (api_ready (self));
1211	OUTPUT:	1510	OUTPUT:
1212	RETVAL	1511	RETVAL
1213		1512
1214	SV *
1215	is_ready (SV *self)
1216	PROTOTYPE: $
1217	CODE:
1218	RETVAL = boolSV (api_is_ready (self));
1219	OUTPUT:
1220	RETVAL
1221
1222	int	1513	int
1223	nready (...)	1514	nready (...)
1224	PROTOTYPE:	1515	PROTOTYPE:
1225	CODE:	1516	CODE:
1226	RETVAL = coro_nready;	1517	RETVAL = coro_nready;
1227	OUTPUT:	1518	OUTPUT:
1228	RETVAL	1519	RETVAL
1229		1520
1230	void
1231	_set_current (SV *current)
1232	PROTOTYPE: $
1233	CODE:
1234	SvREFCNT_dec (SvRV (coro_current));
1235	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1236
1237	MODULE = Coro::State PACKAGE = Coro::AIO	1521	MODULE = Coro::State PACKAGE = Coro::AIO
1238		1522
1239	SV *	1523	SV *
1240	_get_state ()	1524	_get_state ()
1241	CODE:	1525	CODE:

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