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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 1.151 by root, Wed Sep 19 21:39:15 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	/** coroutine stack handling ************************************************/
		546
490	static void	547	static void
491	setup_coro (struct coro *coro)	548	setup_coro (pTHX_ struct coro *coro)
492	{	549	{
493	/*	550	/*
494	* emulate part of the perl startup here.	551	* emulate part of the perl startup here.
495	*/	552	*/
496
497	coro_init_stacks ();	553	coro_init_stacks (aTHX);
498		554
499	PL_curcop = &PL_compiling;	555	PL_curcop = &PL_compiling;
500	PL_in_eval = EVAL_NULL;	556	PL_in_eval = EVAL_NULL;
		557	PL_comppad = 0;
501	PL_curpm = 0;	558	PL_curpm = 0;
502	PL_localizing = 0;	559	PL_localizing = 0;
503	PL_dirty = 0;	560	PL_dirty = 0;
504	PL_restartop = 0;	561	PL_restartop = 0;
505		562
…		…
513	Zero (&myop, 1, LOGOP);	570	Zero (&myop, 1, LOGOP);
514	myop.op_next = Nullop;	571	myop.op_next = Nullop;
515	myop.op_flags = OPf_WANT_VOID;	572	myop.op_flags = OPf_WANT_VOID;
516		573
517	PUSHMARK (SP);	574	PUSHMARK (SP);
518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	575	XPUSHs (av_shift (GvAV (PL_defgv)));
519	PUTBACK;	576	PUTBACK;
520	PL_op = (OP *)&myop;	577	PL_op = (OP *)&myop;
521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	578	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
522	SPAGAIN;	579	SPAGAIN;
523	}	580	}
524		581
525	ENTER; /* necessary e.g. for dounwind */	582	ENTER; /* necessary e.g. for dounwind */
526	}	583	}
527		584
528	static void	585	static void
529	free_coro_mortal ()	586	free_coro_mortal (pTHX)
530	{	587	{
531	if (coro_mortal)	588	if (coro_mortal)
532	{	589	{
533	SvREFCNT_dec (coro_mortal);	590	SvREFCNT_dec (coro_mortal);
534	coro_mortal = 0;	591	coro_mortal = 0;
535	}	592	}
536	}	593	}
537		594
538	/* inject a fake call to Coro::State::_cctx_init into the execution */	595	/* inject a fake call to Coro::State::_cctx_init into the execution */
		596	/* _cctx_init should be careful, as it could be called at almost any time */
		597	/* during execution of a perl program */
539	static void NOINLINE	598	static void NOINLINE
540	prepare_cctx (coro_cctx *cctx)	599	prepare_cctx (pTHX_ coro_cctx *cctx)
541	{	600	{
542	dSP;	601	dSP;
543	LOGOP myop;	602	LOGOP myop;
544		603
545	Zero (&myop, 1, LOGOP);	604	Zero (&myop, 1, LOGOP);
…		…
554	PL_op = (OP *)&myop;	613	PL_op = (OP *)&myop;
555	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	614	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
556	SPAGAIN;	615	SPAGAIN;
557	}	616	}
558		617
		618	/*
		619	* this is a _very_ stripped down perl interpreter ;)
		620	*/
559	static void	621	static void
560	coro_run (void *arg)	622	coro_run (void *arg)
561	{	623	{
		624	dTHX;
		625
562	/* coro_run is the alternative tail of transfer(), so unlock here. */	626	/* coro_run is the alternative tail of transfer(), so unlock here. */
563	UNLOCK;	627	UNLOCK;
564		628
565	/*
566	* this is a _very_ stripped down perl interpreter ;)
567	*/
568	PL_top_env = &PL_start_env;	629	PL_top_env = &PL_start_env;
569		630
570	/* inject call to cctx_init */	631	/* inject a fake subroutine call to cctx_init */
571	prepare_cctx ((coro_cctx *)arg);	632	prepare_cctx (aTHX_ (coro_cctx *)arg);
572		633
573	/* somebody will hit me for both perl_run and PL_restartop */	634	/* somebody or something will hit me for both perl_run and PL_restartop */
574	PL_restartop = PL_op;	635	PL_restartop = PL_op;
575	perl_run (PL_curinterp);	636	perl_run (PL_curinterp);
576		637
577	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	638	/*
578	abort ();	639	* If perl-run returns we assume exit() was being called or the coro
		640	* fell off the end, which seems to be the only valid (non-bug)
		641	* reason for perl_run to return. We try to exit by jumping to the
		642	* bootstrap-time "top" top_env, as we cannot restore the "main"
		643	* coroutine as Coro has no such concept
		644	*/
		645	PL_top_env = main_top_env;
		646	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
579	}	647	}
580		648
581	static coro_cctx *	649	static coro_cctx *
582	cctx_new ()	650	cctx_new ()
583	{	651	{
584	coro_cctx *cctx;	652	coro_cctx *cctx;
		653	void *stack_start;
		654	size_t stack_size;
585		655
586	++cctx_count;	656	++cctx_count;
587		657
588	New (0, cctx, 1, coro_cctx);	658	Newz (0, cctx, 1, coro_cctx);
589		659
590	#if HAVE_MMAP	660	#if HAVE_MMAP
591		661
592	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	662	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
593	/* mmap supposedly does allocate-on-write for us */	663	/* 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);	664	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
595		665
596	if (cctx->sptr == (void *)-1)	666	if (cctx->sptr != (void *)-1)
597	{
598	perror ("FATAL: unable to mmap stack for coroutine");
599	_exit (EXIT_FAILURE);
600	}	667	{
601
602	# if STACKGUARD	668	# if CORO_STACKGUARD
603	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	669	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
604	# endif	670	# endif
		671	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		672	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		673	cctx->mapped = 1;
		674	}
		675	else
		676	#endif
		677	{
		678	cctx->ssize = coro_stacksize * (long)sizeof (long);
		679	New (0, cctx->sptr, coro_stacksize, long);
605		680
606	#else
607
608	cctx->ssize = STACKSIZE * (long)sizeof (long);
609	New (0, cctx->sptr, STACKSIZE, long);
610
611	if (!cctx->sptr)	681	if (!cctx->sptr)
612	{	682	{
613	perror ("FATAL: unable to malloc stack for coroutine");	683	perror ("FATAL: unable to allocate stack for coroutine");
614	_exit (EXIT_FAILURE);	684	_exit (EXIT_FAILURE);
615	}	685	}
616		686
617	#endif	687	stack_start = cctx->sptr;
		688	stack_size = cctx->ssize;
		689	}
618		690
619	#if USE_VALGRIND	691	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);	692	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
627		693
628	return cctx;	694	return cctx;
629	}	695	}
630		696
631	static void	697	static void
…		…
634	if (!cctx)	700	if (!cctx)
635	return;	701	return;
636		702
637	--cctx_count;	703	--cctx_count;
638		704
639	#if USE_VALGRIND	705	#if CORO_USE_VALGRIND
640	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	706	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
641	#endif	707	#endif
642		708
643	#if HAVE_MMAP	709	#if HAVE_MMAP
		710	if (cctx->mapped)
644	munmap (cctx->sptr, cctx->ssize);	711	munmap (cctx->sptr, cctx->ssize);
645	#else	712	else
		713	#endif
646	Safefree (cctx->sptr);	714	Safefree (cctx->sptr);
647	#endif
648		715
649	Safefree (cctx);	716	Safefree (cctx);
650	}	717	}
651		718
652	static coro_cctx *	719	static coro_cctx *
653	cctx_get ()	720	cctx_get (pTHX)
654	{	721	{
655	coro_cctx *cctx;
656
657	if (cctx_first)	722	while (cctx_first)
658	{	723	{
659	cctx = cctx_first;	724	coro_cctx *cctx = cctx_first;
660	cctx_first = cctx->next;	725	cctx_first = cctx->next;
661	--cctx_idle;	726	--cctx_idle;
		727
		728	if (cctx->ssize >= coro_stacksize)
		729	return cctx;
		730
		731	cctx_destroy (cctx);
662	}	732	}
663	else	733
664	{
665	cctx = cctx_new ();
666	PL_op = PL_op->op_next;	734	PL_op = PL_op->op_next;
667	}
668
669	return cctx;	735	return cctx_new ();
670	}	736	}
671		737
672	static void	738	static void
673	cctx_put (coro_cctx *cctx)	739	cctx_put (coro_cctx *cctx)
674	{	740	{
…		…
686	++cctx_idle;	752	++cctx_idle;
687	cctx->next = cctx_first;	753	cctx->next = cctx_first;
688	cctx_first = cctx;	754	cctx_first = cctx;
689	}	755	}
690		756
		757	/** coroutine switching *****************************************************/
		758
691	/* never call directly, always through the coro_state_transfer global variable */	759	/* never call directly, always through the coro_state_transfer global variable */
692	static void NOINLINE	760	static void NOINLINE
693	transfer (struct coro *prev, struct coro *next, int flags)	761	transfer (pTHX_ struct coro *prev, struct coro *next)
694	{	762	{
695	dSTACKLEVEL;	763	dSTACKLEVEL;
696		764
697	/* sometimes transfer is only called to set idle_sp */	765	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	766	if (!next)
		767	{
699	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	768	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		769	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		770	}
700	else if (prev != next)	771	else if (prev != next)
701	{	772	{
702	coro_cctx *prev__cctx;	773	coro_cctx *prev__cctx;
703		774
704	if (prev->flags & CF_NEW)	775	if (prev->flags & CF_NEW)
…		…
715	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	786	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
716		787
717	if (next->flags & CF_RUNNING)	788	if (next->flags & CF_RUNNING)
718	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	789	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
719		790
		791	if (next->flags & CF_DESTROYED)
		792	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		793
720	prev->flags &= ~CF_RUNNING;	794	prev->flags &= ~CF_RUNNING;
721	next->flags |= CF_RUNNING;	795	next->flags |= CF_RUNNING;
722		796
723	LOCK;	797	LOCK;
724		798
725	if (next->flags & CF_NEW)	799	if (next->flags & CF_NEW)
726	{	800	{
727	/* need to start coroutine */	801	/* need to start coroutine */
728	next->flags &= ~CF_NEW;	802	next->flags &= ~CF_NEW;
729	/* first get rid of the old state */	803	/* first get rid of the old state */
730	SAVE (prev, -1);	804	save_perl (aTHX_ prev);
731	/* setup coroutine call */	805	/* setup coroutine call */
732	setup_coro (next);	806	setup_coro (aTHX_ next);
733	/* need a new stack */	807	/* need a new stack */
734	assert (!next->stack);	808	assert (!next->cctx);
735	}	809	}
736	else	810	else
737	{	811	{
738	/* coroutine already started */	812	/* coroutine already started */
739	SAVE (prev, flags);	813	save_perl (aTHX_ prev);
740	LOAD (next);	814	load_perl (aTHX_ next);
741	}	815	}
742		816
743	prev__cctx = prev->cctx;	817	prev__cctx = prev->cctx;
744		818
745	/* possibly "free" the cctx */	819	/* possibly "free" the cctx */
746	if (prev__cctx->idle_sp == STACKLEVEL)	820	if (prev__cctx->idle_sp == STACKLEVEL)
747	{	821	{
748	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	822	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
749	assert (PL_top_env == prev__cctx->top_env);	823	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
750		824
751	prev->cctx = 0;	825	prev->cctx = 0;
752		826
753	cctx_put (prev__cctx);	827	cctx_put (prev__cctx);
754	prev__cctx->inuse = 0;	828	prev__cctx->inuse = 0;
755	}	829	}
756		830
757	if (!next->cctx)	831	if (!next->cctx)
758	{	832	{
759	next->cctx = cctx_get ();	833	next->cctx = cctx_get (aTHX);
760	assert (!next->cctx->inuse);	834	assert (!next->cctx->inuse);
761	next->cctx->inuse = 1;	835	next->cctx->inuse = 1;
762	}	836	}
763		837
764	if (prev__cctx != next->cctx)	838	if (prev__cctx != next->cctx)
…		…
766	prev__cctx->top_env = PL_top_env;	840	prev__cctx->top_env = PL_top_env;
767	PL_top_env = next->cctx->top_env;	841	PL_top_env = next->cctx->top_env;
768	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	842	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
769	}	843	}
770		844
771	free_coro_mortal ();	845	free_coro_mortal (aTHX);
772
773	UNLOCK;	846	UNLOCK;
774	}	847	}
775	}	848	}
776		849
777	struct transfer_args	850	struct transfer_args
778	{	851	{
779	struct coro *prev, *next;	852	struct coro *prev, *next;
780	int flags;
781	};	853	};
782		854
783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	855	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
784		856
		857	/** high level stuff ********************************************************/
		858
785	static void	859	static int
786	coro_state_destroy (struct coro *coro)	860	coro_state_destroy (pTHX_ struct coro *coro)
787	{	861	{
788	if (coro->refcnt--)	862	if (coro->flags & CF_DESTROYED)
789	return;	863	return 0;
		864
		865	coro->flags |= CF_DESTROYED;
		866
		867	if (coro->flags & CF_READY)
		868	{
		869	/* reduce nready, as destroying a ready coro effectively unreadies it */
		870	/* alternative: look through all ready queues and remove the coro */
		871	LOCK;
		872	--coro_nready;
		873	UNLOCK;
		874	}
		875	else
		876	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		877
791	if (coro->mainstack && coro->mainstack != main_mainstack)	878	if (coro->mainstack && coro->mainstack != main_mainstack)
792	{	879	{
793	struct coro temp;	880	struct coro temp;
		881
		882	assert (!(coro->flags & CF_RUNNING));
		883
		884	Zero (&temp, 1, struct coro);
		885	temp.save = CORO_SAVE_ALL;
794		886
795	if (coro->flags & CF_RUNNING)	887	if (coro->flags & CF_RUNNING)
796	croak ("FATAL: tried to destroy currently running coroutine");	888	croak ("FATAL: tried to destroy currently running coroutine");
797		889
798	SAVE ((&temp), TRANSFER_SAVE_ALL);	890	save_perl (aTHX_ &temp);
799	LOAD (coro);	891	load_perl (aTHX_ coro);
800		892
801	coro_destroy_stacks ();	893	coro_destroy_stacks (aTHX);
802		894
803	LOAD ((&temp)); /* this will get rid of defsv etc.. */	895	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
804		896
805	coro->mainstack = 0;	897	coro->mainstack = 0;
806	}	898	}
807		899
808	cctx_destroy (coro->cctx);	900	cctx_destroy (coro->cctx);
809	SvREFCNT_dec (coro->args);	901	SvREFCNT_dec (coro->args);
810	Safefree (coro);	902
		903	if (coro->next) coro->next->prev = coro->prev;
		904	if (coro->prev) coro->prev->next = coro->next;
		905	if (coro == first) first = coro->next;
		906
		907	return 1;
811	}	908	}
812		909
813	static int	910	static int
814	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	911	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
815	{	912	{
816	struct coro *coro = (struct coro *)mg->mg_ptr;	913	struct coro *coro = (struct coro *)mg->mg_ptr;
817	mg->mg_ptr = 0;	914	mg->mg_ptr = 0;
818		915
		916	coro->hv = 0;
		917
		918	if (--coro->refcnt < 0)
		919	{
819	coro_state_destroy (coro);	920	coro_state_destroy (aTHX_ coro);
		921	Safefree (coro);
		922	}
820		923
821	return 0;	924	return 0;
822	}	925	}
823		926
824	static int	927	static int
…		…
831	return 0;	934	return 0;
832	}	935	}
833		936
834	static MGVTBL coro_state_vtbl = {	937	static MGVTBL coro_state_vtbl = {
835	0, 0, 0, 0,	938	0, 0, 0, 0,
836	coro_state_clear,	939	coro_state_free,
837	0,	940	0,
838	#ifdef MGf_DUP	941	#ifdef MGf_DUP
839	coro_state_dup,	942	coro_state_dup,
840	#else	943	#else
841	# define MGf_DUP 0	944	# define MGf_DUP 0
842	#endif	945	#endif
843	};	946	};
844		947
845	static struct coro *	948	static struct coro *
846	SvSTATE (SV *coro)	949	SvSTATE_ (pTHX_ SV *coro)
847	{	950	{
848	HV *stash;	951	HV *stash;
849	MAGIC *mg;	952	MAGIC *mg;
850		953
851	if (SvROK (coro))	954	if (SvROK (coro))
…		…
857	/* very slow, but rare, check */	960	/* very slow, but rare, check */
858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	961	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859	croak ("Coro::State object required");	962	croak ("Coro::State object required");
860	}	963	}
861		964
862	mg = SvMAGIC (coro);	965	mg = CORO_MAGIC (coro);
863	assert (mg->mg_type == PERL_MAGIC_ext);
864	return (struct coro *)mg->mg_ptr;	966	return (struct coro *)mg->mg_ptr;
865	}	967	}
866		968
		969	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		970
867	static void	971	static void
868	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	972	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
869	{	973	{
870	ta->prev = SvSTATE (prev);	974	ta->prev = SvSTATE (prev_sv);
871	ta->next = SvSTATE (next);	975	ta->next = SvSTATE (next_sv);
872	ta->flags = flags;
873	}	976	}
874		977
875	static void	978	static void
876	api_transfer (SV *prev, SV *next, int flags)	979	api_transfer (SV *prev_sv, SV *next_sv)
877	{	980	{
		981	dTHX;
878	struct transfer_args ta;	982	struct transfer_args ta;
879		983
880	prepare_transfer (&ta, prev, next, flags);	984	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	985	TRANSFER (ta);
882	}	986	}
883		987
		988	static int
		989	api_save (SV *coro_sv, int new_save)
		990	{
		991	dTHX;
		992	struct coro *coro = SvSTATE (coro_sv);
		993	int old_save = coro->save;
		994
		995	if (new_save >= 0)
		996	coro->save = new_save;
		997
		998	return old_save;
		999	}
		1000
884	/** Coro ********************************************************************/	1001	/** Coro ********************************************************************/
885		1002
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	1003	static void
899	coro_enq (SV *coro_sv)	1004	coro_enq (pTHX_ SV *coro_sv)
900	{	1005	{
901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1006	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
902	coro_nready++;
903	}	1007	}
904		1008
905	static SV *	1009	static SV *
906	coro_deq (int min_prio)	1010	coro_deq (pTHX_ int min_prio)
907	{	1011	{
908	int prio = PRIO_MAX - PRIO_MIN;	1012	int prio = PRIO_MAX - PRIO_MIN;
909		1013
910	min_prio -= PRIO_MIN;	1014	min_prio -= PRIO_MIN;
911	if (min_prio < 0)	1015	if (min_prio < 0)
912	min_prio = 0;	1016	min_prio = 0;
913		1017
914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1018	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
915	if (AvFILLp (coro_ready [prio]) >= 0)	1019	if (AvFILLp (coro_ready [prio]) >= 0)
916	{
917	coro_nready--;
918	return av_shift (coro_ready [prio]);	1020	return av_shift (coro_ready [prio]);
919	}
920		1021
921	return 0;	1022	return 0;
922	}	1023	}
923		1024
924	static int	1025	static int
925	api_ready (SV *coro_sv)	1026	api_ready (SV *coro_sv)
926	{	1027	{
		1028	dTHX;
927	struct coro *coro;	1029	struct coro *coro;
928		1030
929	if (SvROK (coro_sv))	1031	if (SvROK (coro_sv))
930	coro_sv = SvRV (coro_sv);	1032	coro_sv = SvRV (coro_sv);
931		1033
932	coro = SvSTATE (coro_sv);	1034	coro = SvSTATE (coro_sv);
933		1035
934	if (coro->flags & CF_READY)	1036	if (coro->flags & CF_READY)
935	return 0;	1037	return 0;
936		1038
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;	1039	coro->flags |= CF_READY;
943		1040
944	LOCK;	1041	LOCK;
945	coro_enq (SvREFCNT_inc (coro_sv));	1042	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1043	++coro_nready;
946	UNLOCK;	1044	UNLOCK;
947		1045
948	return 1;	1046	return 1;
949	}	1047	}
950		1048
951	static int	1049	static int
952	api_is_ready (SV *coro_sv)	1050	api_is_ready (SV *coro_sv)
953	{	1051	{
		1052	dTHX;
954	return !!SvSTATE (coro_sv)->flags & CF_READY;	1053	return !!(SvSTATE (coro_sv)->flags & CF_READY);
955	}	1054	}
956		1055
957	static void	1056	static void
958	prepare_schedule (struct transfer_args *ta)	1057	prepare_schedule (pTHX_ struct transfer_args *ta)
959	{	1058	{
960	SV *prev, *next;	1059	SV *prev_sv, *next_sv;
961		1060
962	for (;;)	1061	for (;;)
963	{	1062	{
964	LOCK;	1063	LOCK;
965	next = coro_deq (PRIO_MIN);	1064	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1065
		1066	/* nothing to schedule: call the idle handler */
		1067	if (!next_sv)
		1068	{
		1069	dSP;
		1070	UNLOCK;
		1071
		1072	ENTER;
		1073	SAVETMPS;
		1074
		1075	PUSHMARK (SP);
		1076	PUTBACK;
		1077	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1078
		1079	FREETMPS;
		1080	LEAVE;
		1081	continue;
		1082	}
		1083
		1084	ta->next = SvSTATE (next_sv);
		1085
		1086	/* cannot transfer to destroyed coros, skip and look for next */
		1087	if (ta->next->flags & CF_DESTROYED)
		1088	{
		1089	UNLOCK;
		1090	SvREFCNT_dec (next_sv);
		1091	/* coro_nready is already taken care of by destroy */
		1092	continue;
		1093	}
		1094
		1095	--coro_nready;
966	UNLOCK;	1096	UNLOCK;
967
968	if (next)
969	break;	1097	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	}	1098	}
984	}
985
986	prev = SvRV (coro_current);
987	SvRV_set (coro_current, next);
988		1099
989	/* free this only after the transfer */	1100	/* free this only after the transfer */
		1101	prev_sv = SvRV (coro_current);
		1102	SvRV_set (coro_current, next_sv);
		1103	ta->prev = SvSTATE (prev_sv);
		1104
		1105	assert (ta->next->flags & CF_READY);
		1106	ta->next->flags &= ~CF_READY;
		1107
990	LOCK;	1108	LOCK;
991	free_coro_mortal ();	1109	free_coro_mortal (aTHX);
		1110	coro_mortal = prev_sv;
992	UNLOCK;	1111	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	}	1112	}
1005		1113
1006	static void	1114	static void
1007	prepare_cede (struct transfer_args *ta)	1115	prepare_cede (pTHX_ struct transfer_args *ta)
1008	{	1116	{
1009	api_ready (coro_current);	1117	api_ready (coro_current);
1010
1011	prepare_schedule (ta);	1118	prepare_schedule (aTHX_ ta);
		1119	}
		1120
		1121	static int
		1122	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1123	{
		1124	if (coro_nready)
		1125	{
		1126	SV *prev = SvRV (coro_current);
		1127	prepare_schedule (aTHX_ ta);
		1128	api_ready (prev);
		1129	return 1;
		1130	}
		1131	else
		1132	return 0;
1012	}	1133	}
1013		1134
1014	static void	1135	static void
1015	api_schedule (void)	1136	api_schedule (void)
1016	{	1137	{
		1138	dTHX;
1017	struct transfer_args ta;	1139	struct transfer_args ta;
1018		1140
1019	prepare_schedule (&ta);	1141	prepare_schedule (aTHX_ &ta);
1020	TRANSFER (ta);	1142	TRANSFER (ta);
1021	}	1143	}
1022		1144
1023	static void	1145	static int
1024	api_cede (void)	1146	api_cede (void)
1025	{	1147	{
		1148	dTHX;
1026	struct transfer_args ta;	1149	struct transfer_args ta;
1027		1150
1028	prepare_cede (&ta);	1151	prepare_cede (aTHX_ &ta);
		1152
		1153	if (ta.prev != ta.next)
		1154	{
1029	TRANSFER (ta);	1155	TRANSFER (ta);
		1156	return 1;
		1157	}
		1158	else
		1159	return 0;
		1160	}
		1161
		1162	static int
		1163	api_cede_notself (void)
		1164	{
		1165	dTHX;
		1166	struct transfer_args ta;
		1167
		1168	if (prepare_cede_notself (aTHX_ &ta))
		1169	{
		1170	TRANSFER (ta);
		1171	return 1;
		1172	}
		1173	else
		1174	return 0;
1030	}	1175	}
1031		1176
1032	MODULE = Coro::State PACKAGE = Coro::State	1177	MODULE = Coro::State PACKAGE = Coro::State
1033		1178
1034	PROTOTYPES: DISABLE	1179	PROTOTYPES: DISABLE
…		…
1040	#endif	1185	#endif
1041	BOOT_PAGESIZE;	1186	BOOT_PAGESIZE;
1042		1187
1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1188	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1044		1189
1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1190	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1191	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1192	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1193	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1194	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1195	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1196	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1048		1197
1049	main_mainstack = PL_mainstack;	1198	main_mainstack = PL_mainstack;
		1199	main_top_env = PL_top_env;
		1200
		1201	while (main_top_env->je_prev)
		1202	main_top_env = main_top_env->je_prev;
1050		1203
1051	coroapi.ver = CORO_API_VERSION;	1204	coroapi.ver = CORO_API_VERSION;
1052	coroapi.transfer = api_transfer;	1205	coroapi.transfer = api_transfer;
1053		1206
1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1207	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1062	HV *hv;	1215	HV *hv;
1063	int i;	1216	int i;
1064		1217
1065	Newz (0, coro, 1, struct coro);	1218	Newz (0, coro, 1, struct coro);
1066	coro->args = newAV ();	1219	coro->args = newAV ();
		1220	coro->save = CORO_SAVE_DEF;
1067	coro->flags = CF_NEW;	1221	coro->flags = CF_NEW;
1068		1222
		1223	if (first) first->prev = coro;
		1224	coro->next = first;
		1225	first = coro;
		1226
1069	hv = newHV ();	1227	coro->hv = hv = newHV ();
1070	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1228	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));	1229	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1072		1230
1073	for (i = 1; i < items; i++)	1231	for (i = 1; i < items; i++)
1074	av_push (coro->args, newSVsv (ST (i)));	1232	av_push (coro->args, newSVsv (ST (i)));
1075	}	1233	}
1076	OUTPUT:	1234	OUTPUT:
		1235	RETVAL
		1236
		1237	int
		1238	save (SV *coro, int new_save = -1)
		1239	CODE:
		1240	RETVAL = api_save (coro, new_save);
		1241	OUTPUT:
		1242	RETVAL
		1243
		1244	int
		1245	save_also (SV *coro_sv, int save_also)
		1246	CODE:
		1247	{
		1248	struct coro *coro = SvSTATE (coro_sv);
		1249	RETVAL = coro->save;
		1250	coro->save |= save_also;
		1251	}
		1252	OUTPUT:
1077	RETVAL	1253	RETVAL
1078		1254
1079	void	1255	void
1080	_set_stacklevel (...)	1256	_set_stacklevel (...)
1081	ALIAS:	1257	ALIAS:
1082	Coro::State::transfer = 1	1258	Coro::State::transfer = 1
1083	Coro::schedule = 2	1259	Coro::schedule = 2
1084	Coro::cede = 3	1260	Coro::cede = 3
		1261	Coro::cede_notself = 4
1085	CODE:	1262	CODE:
1086	{	1263	{
1087	struct transfer_args ta;	1264	struct transfer_args ta;
1088		1265
1089	switch (ix)	1266	switch (ix)
1090	{	1267	{
1091	case 0:	1268	case 0:
1092	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1269	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1093	ta.next = 0;	1270	ta.next = 0;
1094	ta.flags = TRANSFER_SET_STACKLEVEL;
1095	break;	1271	break;
1096		1272
1097	case 1:	1273	case 1:
1098	if (items != 3)	1274	if (items != 2)
1099	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1275	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1100		1276
1101	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1277	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1102	break;	1278	break;
1103		1279
1104	case 2:	1280	case 2:
1105	prepare_schedule (&ta);	1281	prepare_schedule (aTHX_ &ta);
1106	break;	1282	break;
1107		1283
1108	case 3:	1284	case 3:
1109	prepare_cede (&ta);	1285	prepare_cede (aTHX_ &ta);
		1286	break;
		1287
		1288	case 4:
		1289	if (!prepare_cede_notself (aTHX_ &ta))
		1290	XSRETURN_EMPTY;
		1291
1110	break;	1292	break;
1111	}	1293	}
1112		1294
		1295	BARRIER;
1113	TRANSFER (ta);	1296	TRANSFER (ta);
1114	}
1115		1297
1116	void	1298	if (GIMME_V != G_VOID && ta.next != ta.prev)
1117	_clone_state_from (SV *dst, SV *src)	1299	XSRETURN_YES;
		1300	}
		1301
		1302	bool
		1303	_destroy (SV *coro_sv)
1118	CODE:	1304	CODE:
1119	{	1305	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1120	struct coro *coro_src = SvSTATE (src);	1306	OUTPUT:
1121		1307	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		1308
1128	void	1309	void
1129	_exit (code)	1310	_exit (code)
1130	int code	1311	int code
1131	PROTOTYPE: $	1312	PROTOTYPE: $
1132	CODE:	1313	CODE:
1133	_exit (code);	1314	_exit (code);
1134		1315
1135	int	1316	int
		1317	cctx_stacksize (int new_stacksize = 0)
		1318	CODE:
		1319	RETVAL = coro_stacksize;
		1320	if (new_stacksize)
		1321	coro_stacksize = new_stacksize;
		1322	OUTPUT:
		1323	RETVAL
		1324
		1325	int
1136	cctx_count ()	1326	cctx_count ()
1137	CODE:	1327	CODE:
1138	RETVAL = cctx_count;	1328	RETVAL = cctx_count;
1139	OUTPUT:	1329	OUTPUT:
1140	RETVAL	1330	RETVAL
…		…
1144	CODE:	1334	CODE:
1145	RETVAL = cctx_idle;	1335	RETVAL = cctx_idle;
1146	OUTPUT:	1336	OUTPUT:
1147	RETVAL	1337	RETVAL
1148		1338
		1339	void
		1340	list ()
		1341	PPCODE:
		1342	{
		1343	struct coro *coro;
		1344	for (coro = first; coro; coro = coro->next)
		1345	if (coro->hv)
		1346	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1347	}
		1348
		1349	void
		1350	_eval (SV *coro_sv, SV *coderef)
		1351	CODE:
		1352	{
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354	if (coro->mainstack)
		1355	{
		1356	struct coro temp;
		1357	Zero (&temp, 1, struct coro);
		1358	temp.save = CORO_SAVE_ALL;
		1359
		1360	if (!(coro->flags & CF_RUNNING))
		1361	{
		1362	save_perl (aTHX_ &temp);
		1363	load_perl (aTHX_ coro);
		1364	}
		1365
		1366	{
		1367	dSP;
		1368	ENTER;
		1369	SAVETMPS;
		1370	PUSHMARK (SP);
		1371	PUTBACK;
		1372	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1373	SPAGAIN;
		1374	FREETMPS;
		1375	LEAVE;
		1376	PUTBACK;
		1377	}
		1378
		1379	if (!(coro->flags & CF_RUNNING))
		1380	{
		1381	save_perl (aTHX_ coro);
		1382	load_perl (aTHX_ &temp);
		1383	}
		1384	}
		1385	}
		1386
		1387	SV *
		1388	is_ready (SV *coro_sv)
		1389	PROTOTYPE: $
		1390	ALIAS:
		1391	is_ready = CF_READY
		1392	is_running = CF_RUNNING
		1393	is_new = CF_NEW
		1394	is_destroyed = CF_DESTROYED
		1395	CODE:
		1396	struct coro *coro = SvSTATE (coro_sv);
		1397	RETVAL = boolSV (coro->flags & ix);
		1398	OUTPUT:
		1399	RETVAL
		1400
		1401
1149	MODULE = Coro::State PACKAGE = Coro	1402	MODULE = Coro::State PACKAGE = Coro
1150		1403
1151	BOOT:	1404	BOOT:
1152	{	1405	{
1153	int i;	1406	int i;
…		…
1168	coro_ready[i] = newAV ();	1421	coro_ready[i] = newAV ();
1169		1422
1170	{	1423	{
1171	SV *sv = perl_get_sv("Coro::API", 1);	1424	SV *sv = perl_get_sv("Coro::API", 1);
1172		1425
1173	coroapi.schedule = api_schedule;	1426	coroapi.schedule = api_schedule;
		1427	coroapi.save = api_save;
1174	coroapi.cede = api_cede;	1428	coroapi.cede = api_cede;
		1429	coroapi.cede_notself = api_cede_notself;
1175	coroapi.ready = api_ready;	1430	coroapi.ready = api_ready;
1176	coroapi.is_ready = api_is_ready;	1431	coroapi.is_ready = api_is_ready;
1177	coroapi.nready = &coro_nready;	1432	coroapi.nready = &coro_nready;
1178	coroapi.current = coro_current;	1433	coroapi.current = coro_current;
1179		1434
1180	GCoroAPI = &coroapi;	1435	GCoroAPI = &coroapi;
1181	sv_setiv (sv, (IV)&coroapi);	1436	sv_setiv (sv, (IV)&coroapi);
1182	SvREADONLY_on (sv);	1437	SvREADONLY_on (sv);
1183	}	1438	}
1184	}	1439	}
		1440
		1441	void
		1442	_set_current (SV *current)
		1443	PROTOTYPE: $
		1444	CODE:
		1445	SvREFCNT_dec (SvRV (coro_current));
		1446	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1185		1447
1186	int	1448	int
1187	prio (Coro::State coro, int newprio = 0)	1449	prio (Coro::State coro, int newprio = 0)
1188	ALIAS:	1450	ALIAS:
1189	nice = 1	1451	nice = 1
…		…
1192	RETVAL = coro->prio;	1454	RETVAL = coro->prio;
1193		1455
1194	if (items > 1)	1456	if (items > 1)
1195	{	1457	{
1196	if (ix)	1458	if (ix)
1197	newprio += coro->prio;	1459	newprio = coro->prio - newprio;
1198		1460
1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1461	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1462	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1201		1463
1202	coro->prio = newprio;	1464	coro->prio = newprio;
1203	}	1465	}
1204	}	1466	}
		1467	OUTPUT:
		1468	RETVAL
1205		1469
1206	SV *	1470	SV *
1207	ready (SV *self)	1471	ready (SV *self)
1208	PROTOTYPE: $	1472	PROTOTYPE: $
1209	CODE:	1473	CODE:
1210	RETVAL = boolSV (api_ready (self));	1474	RETVAL = boolSV (api_ready (self));
1211	OUTPUT:	1475	OUTPUT:
1212	RETVAL	1476	RETVAL
1213		1477
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	1478	int
1223	nready (...)	1479	nready (...)
1224	PROTOTYPE:	1480	PROTOTYPE:
1225	CODE:	1481	CODE:
1226	RETVAL = coro_nready;	1482	RETVAL = coro_nready;
1227	OUTPUT:	1483	OUTPUT:
1228	RETVAL	1484	RETVAL
1229		1485
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	1486	MODULE = Coro::State PACKAGE = Coro::AIO
1238		1487
1239	SV *	1488	SV *
1240	_get_state ()	1489	_get_state ()
1241	CODE:	1490	CODE:

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