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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.113 by root, Thu Nov 30 20:54:24 2006 UTC vs.
Revision 1.167 by root, Thu Sep 27 15:52:31 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
74	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
76	* and should be unique. */	40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#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
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
79		97
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		99
82	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	103	#else
85	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
86	#endif	106	#endif
87		107
88	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
89		109
90	#include "CoroAPI.h"	110	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		111
94	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	116	#else
99	# define LOCK (void)0	117	# define LOCK (void)0
100	# define UNLOCK (void)0	118	# define UNLOCK (void)0
101	#endif	119	#endif
102		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
107		136
		137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
108	static struct coro_cctx *cctx_first;	142	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
110		153
111	/* this is a structure representing a c-level coroutine */	154	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	155	typedef struct coro_cctx {
113	struct coro_cctx *next;	156	struct coro_cctx *next;
114		157
115	/* the stack */	158	/* the stack */
116	void *sptr;	159	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	160	size_t ssize;
118		161
119	/* cpu state */	162	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	165	JMPENV *top_env;
122	coro_context cctx;	166	coro_context cctx;
123		167
124	int inuse;
125
126	#if USE_VALGRIND	168	#if CORO_USE_VALGRIND
127	int valgrind_id;	169	int valgrind_id;
128	#endif	170	#endif
		171	unsigned char flags;
129	} coro_cctx;	172	} coro_cctx;
130		173
131	enum {	174	enum {
132	CF_RUNNING, /* coroutine is running */	175	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	179	};
135		180
136	/* this is a structure representing a perl-level coroutine */	181	/* this is a structure representing a perl-level coroutine */
137	struct coro {	182	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	183	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	184	coro_cctx *cctx;
140		185
141	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
142	AV *args;	187	AV *args;
143	int refcnt;	188	int refcnt;
144	int flags;	189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
145		191
146	/* optionally saved, might be zero */	192	/* optionally saved, might be zero */
147	AV *defav;	193	AV *defav; /* @_ */
148	SV *defsv;	194	SV *defsv; /* $_ */
149	SV *errsv;	195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
150		199
151	#define VAR(name,type) type name;	200	#define VAR(name,type) type name;
152	# include "state.h"	201	# include "state.h"
153	#undef VAR	202	#undef VAR
154		203
155	/* coro process data */	204	/* coro process data */
156	int prio;	205	int prio;
		206
		207	/* linked list */
		208	struct coro *next, *prev;
		209	HV *hv; /* the perl hash associated with this coro, if any */
157	};	210	};
158		211
159	typedef struct coro *Coro__State;	212	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	213	typedef struct coro *Coro__State_or_hashref;
161		214
		215	/** Coro ********************************************************************/
		216
		217	#define PRIO_MAX 3
		218	#define PRIO_HIGH 1
		219	#define PRIO_NORMAL 0
		220	#define PRIO_LOW -1
		221	#define PRIO_IDLE -3
		222	#define PRIO_MIN -4
		223
		224	/* for Coro.pm */
		225	static SV *coro_current;
		226	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		227	static int coro_nready;
		228	static struct coro *coro_first;
		229
		230	/** lowlevel stuff **********************************************************/
		231
162	static AV *	232	static AV *
163	coro_clone_padlist (CV *cv)	233	coro_clone_padlist (pTHX_ CV *cv)
164	{	234	{
165	AV *padlist = CvPADLIST (cv);	235	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	236	AV *newpadlist, *newpad;
167		237
168	newpadlist = newAV ();	238	newpadlist = newAV ();
…		…
180		250
181	return newpadlist;	251	return newpadlist;
182	}	252	}
183		253
184	static void	254	static void
185	free_padlist (AV *padlist)	255	free_padlist (pTHX_ AV *padlist)
186	{	256	{
187	/* may be during global destruction */	257	/* may be during global destruction */
188	if (SvREFCNT (padlist))	258	if (SvREFCNT (padlist))
189	{	259	{
190	I32 i = AvFILLp (padlist);	260	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	281	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	282	AV *av = (AV *)mg->mg_obj;
213		283
214	/* casting is fun. */	284	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	285	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (padlist);	286	free_padlist (aTHX_ padlist);
217		287
218	SvREFCNT_dec (av);	288	SvREFCNT_dec (av);
219		289
220	return 0;	290	return 0;
221	}	291	}
…		…
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	301	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	302	: 0
233		303
234	/* the next two functions merely cache the padlists */	304	/* the next two functions merely cache the padlists */
235	static void	305	static void
236	get_padlist (CV *cv)	306	get_padlist (pTHX_ CV *cv)
237	{	307	{
238	MAGIC *mg = CORO_MAGIC (cv);	308	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	309	AV *av;
240		310
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	311	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	312	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	313	else
244	{	314	{
245	#if 0	315	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	316	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	317	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	318	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	319	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	320	SvREFCNT_dec (cp);
251	#else	321	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	322	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	323	#endif
254	}	324	}
255	}	325	}
256		326
257	static void	327	static void
258	put_padlist (CV *cv)	328	put_padlist (pTHX_ CV *cv)
259	{	329	{
260	MAGIC *mg = CORO_MAGIC (cv);	330	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	331	AV *av;
262		332
263	if (!mg)	333	if (!mg)
…		…
274	av_extend (av, AvMAX (av) + 1);	344	av_extend (av, AvMAX (av) + 1);
275		345
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	346	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	347	}
278		348
		349	/** load & save, init *******************************************************/
		350
279	#define SB do {	351	#define SB do {
280	#define SE } while (0)	352	#define SE } while (0)
281		353
282	#define LOAD(state) load_state((state));
283	#define SAVE(state,flags) save_state((state),(flags));
284
285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	354	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
286		355
287	static void	356	static void
288	load_state(Coro__State c)	357	load_perl (pTHX_ Coro__State c)
289	{	358	{
290	#define VAR(name,type) PL_ ## name = c->name;	359	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	360	# include "state.h"
292	#undef VAR	361	#undef VAR
293		362
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	363	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	364	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	365	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		366	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		367
		368	if (c->irssv)
		369	{
		370	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		371	{
		372	SvREFCNT_dec (c->irssv);
		373	c->irssv = 0;
		374	}
		375	else
		376	{
		377	REPLACE_SV (PL_rs, c->irssv);
		378	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		379	sv_setsv (c->irssv_sv, PL_rs);
		380	}
		381	}
297		382
298	{	383	{
299	dSP;	384	dSP;
300	CV *cv;	385	CV *cv;
301		386
302	/* now do the ugly restore mess */	387	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	388	while ((cv = (CV *)POPs))
304	{	389	{
305	put_padlist (cv); /* mark this padlist as available */	390	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	391	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	392	CvPADLIST (cv) = (AV *)POPs;
308	}	393	}
309		394
310	PUTBACK;	395	PUTBACK;
311	}	396	}
312	}	397	}
313		398
314	static void	399	static void
315	save_state(Coro__State c, int flags)	400	save_perl (pTHX_ Coro__State c)
316	{	401	{
317	{	402	{
318	dSP;	403	dSP;
319	I32 cxix = cxstack_ix;	404	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	405	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	408	/*
324	* the worst thing you can imagine happens first - we have to save	409	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	410	* (and reinitialize) all cv's in the whole callchain :(
326	*/	411	*/
327		412
328	PUSHs (Nullsv);	413	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	414	/* this loop was inspired by pp_caller */
330	for (;;)	415	for (;;)
331	{	416	{
332	while (cxix >= 0)	417	while (cxix >= 0)
333	{	418	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	419	PERL_CONTEXT *cx = &ccstk[cxix--];
335		420
336	if (CxTYPE(cx) == CXt_SUB)	421	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
337	{	422	{
338	CV *cv = cx->blk_sub.cv;	423	CV *cv = cx->blk_sub.cv;
339		424
340	if (CvDEPTH (cv))	425	if (CvDEPTH (cv))
341	{	426	{
342	EXTEND (SP, 3);	427	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	428	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	429	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	430	PUSHs ((SV *)cv);
347		431
348	CvDEPTH (cv) = 0;	432	CvDEPTH (cv) = 0;
349	get_padlist (cv);	433	get_padlist (aTHX_ cv);
350	}	434	}
351	}	435	}
352	#ifdef CXt_FORMAT
353	else if (CxTYPE(cx) == CXt_FORMAT)
354	{
355	/* I never used formats, so how should I know how these are implemented? */
356	/* my bold guess is as a simple, plain sub... */
357	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358	}
359	#endif
360	}	436	}
361		437
362	if (top_si->si_type == PERLSI_MAIN)	438	if (top_si->si_type == PERLSI_MAIN)
363	break;	439	break;
364		440
365	top_si = top_si->si_prev;	441	top_si = top_si->si_prev;
366	ccstk = top_si->si_cxstack;	442	ccstk = top_si->si_cxstack;
367	cxix = top_si->si_cxix;	443	cxix = top_si->si_cxix;
368	}	444	}
369		445
370	PUTBACK;	446	PUTBACK;
371	}	447	}
372		448
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	449	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	450	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	451	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		452	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		453	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
376		454
377	#define VAR(name,type)c->name = PL_ ## name;	455	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	456	# include "state.h"
379	#undef VAR	457	#undef VAR
380	}	458	}
…		…
383	* allocate various perl stacks. This is an exact copy	461	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	462	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	463	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	464	* not usually need a lot of stackspace.
387	*/	465	*/
		466	#if CORO_PREFER_PERL_FUNCTIONS
		467	# define coro_init_stacks init_stacks
		468	#else
388	static void	469	static void
389	coro_init_stacks ()	470	coro_init_stacks (pTHX)
390	{	471	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	472	PL_curstackinfo = new_stackinfo(64, 6);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	473	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	474	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	475	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		476
396	PL_stack_base = AvARRAY(PL_curstack);	477	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	478	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	479	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		480
400	New(50,PL_tmps_stack,96,SV*);	481	New(50,PL_tmps_stack,64,SV*);
401	PL_tmps_floor = -1;	482	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	483	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	484	PL_tmps_max = 64;
404		485
405	New(54,PL_markstack,16,I32);	486	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	487	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	488	PL_markstack_max = PL_markstack + 16;
408		489
…		…
412		493
413	New(54,PL_scopestack,16,I32);	494	New(54,PL_scopestack,16,I32);
414	PL_scopestack_ix = 0;	495	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	496	PL_scopestack_max = 16;
416		497
417	New(54,PL_savestack,96,ANY);	498	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	499	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	500	PL_savestack_max = 64;
420		501
421	#if !PERL_VERSION_ATLEAST (5,9,0)	502	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	503	New(54,PL_retstack,4,OP*);
423	PL_retstack_ix = 0;	504	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	505	PL_retstack_max = 4;
425	#endif	506	#endif
426	}	507	}
		508	#endif
427		509
428	/*	510	/*
429	* destroy the stacks, the callchain etc...	511	* destroy the stacks, the callchain etc...
430	*/	512	*/
431	static void	513	static void
432	coro_destroy_stacks ()	514	coro_destroy_stacks (pTHX)
433	{	515	{
434	if (!IN_DESTRUCT)	516	if (!IN_DESTRUCT)
435	{	517	{
436	/* is this ugly, I ask? */	518	/* restore all saved variables and stuff */
437	LEAVE_SCOPE (0);	519	LEAVE_SCOPE (0);
		520	assert (PL_tmps_floor == -1);
438		521
439	/* sure it is, but more important: is it correct?? :/ */	522	/* free all temporaries */
440	FREETMPS;	523	FREETMPS;
		524	assert (PL_tmps_ix == -1);
441		525
		526	/* unwind all extra stacks */
442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	527	POPSTACK_TO (PL_mainstack);
		528
		529	/* unwind main stack */
		530	dounwind (-1);
443	}	531	}
444		532
445	while (PL_curstackinfo->si_next)	533	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	534	PL_curstackinfo = PL_curstackinfo->si_next;
447		535
448	while (PL_curstackinfo)	536	while (PL_curstackinfo)
449	{	537	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	538	PERL_SI *p = PL_curstackinfo->si_prev;
451		539
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	540	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	541	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		542
464	Safefree (PL_curstackinfo->si_cxstack);	543	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	544	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	545	PL_curstackinfo = p;
467	}	546	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	552	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	553	Safefree (PL_retstack);
475	#endif	554	#endif
476	}	555	}
477		556
		557	static size_t
		558	coro_rss (struct coro *coro)
		559	{
		560	size_t rss = sizeof (coro);
		561
		562	if (coro->mainstack)
		563	{
		564	if (coro->flags & CF_RUNNING)
		565	{
		566	#define VAR(name,type)coro->name = PL_ ## name;
		567	# include "state.h"
		568	#undef VAR
		569	}
		570
		571	rss += sizeof (coro->curstackinfo);
		572	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		573	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		574	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		575	rss += coro->tmps_max * sizeof (SV *);
		576	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		577	rss += coro->scopestack_max * sizeof (I32);
		578	rss += coro->savestack_max * sizeof (ANY);
		579
		580	#if !PERL_VERSION_ATLEAST (5,9,0)
		581	rss += coro->retstack_max * sizeof (OP *);
		582	#endif
		583	}
		584
		585	return rss;
		586	}
		587
		588	/** coroutine stack handling ************************************************/
		589
478	static void	590	static void
479	setup_coro (struct coro *coro)	591	setup_coro (pTHX_ struct coro *coro)
480	{	592	{
481	/*	593	/*
482	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
483	*/	595	*/
484
485	coro_init_stacks ();	596	coro_init_stacks (aTHX);
486		597
		598	PL_curcop = &PL_compiling;
		599	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	600	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	601	PL_curpm = 0;
		602	PL_localizing = 0;
		603	PL_dirty = 0;
		604	PL_restartop = 0;
490		605
491	{	606	{
492	dSP;	607	dSP;
493	LOGOP myop;	608	LOGOP myop;
494		609
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));	610	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;	611	GvAV (PL_defgv) = coro->args; coro->args = 0;
500		612
501	Zero (&myop, 1, LOGOP);	613	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	614	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	615	myop.op_flags = OPf_WANT_VOID;
504		616
		617	PUSHMARK (SP);
		618	XPUSHs (av_shift (GvAV (PL_defgv)));
		619	PUTBACK;
505	PL_op = (OP *)&myop;	620	PL_op = (OP *)&myop;
506
507	PUSHMARK (SP);
508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509	PUTBACK;
510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	621	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	622	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	623	}
		624
		625	ENTER; /* necessary e.g. for dounwind */
515	}	626	}
516		627
517	static void	628	static void
518	free_coro_mortal ()	629	free_coro_mortal (pTHX)
519	{	630	{
520	if (coro_mortal)	631	if (coro_mortal)
521	{	632	{
522	SvREFCNT_dec (coro_mortal);	633	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	634	coro_mortal = 0;
524	}	635	}
525	}	636	}
526		637
		638	static int
		639	runops_coro (pTHX)
		640	{
		641	COP *oldcop = 0;
		642	int oldcxix = -2;
		643
		644	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		645	{
		646	PERL_ASYNC_CHECK ();
		647
		648	if (PL_op->op_type == OP_LEAVESUB)
		649	{
		650	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		651	SV **bot, **top;
		652	AV *av = newAV (); /* return values */
		653	runops_proc_t old_runops = PL_runops;
		654	dSP;
		655	ENTER;
		656	SAVETMPS;
		657	EXTEND (SP, 3);
		658	PL_runops = RUNOPS_DEFAULT;
		659
		660	GV *gv = CvGV (cx->blk_sub.cv);
		661	SV *fullname = sv_2mortal (newSV (0));
		662	if (isGV (gv))
		663	gv_efullname3 (fullname, gv, 0);
		664
		665	bot = PL_stack_base + cx->blk_oldsp + 1;
		666	top = cx->blk_gimme == G_ARRAY ? SP + 1
		667	: cx->blk_gimme == G_SCALAR ? bot + 1
		668	: bot;
		669
		670	while (bot < top)
		671	av_push (av, SvREFCNT_inc (*bot++));
		672
		673	PUSHMARK (SP);
		674	PUSHs (&PL_sv_no);
		675	PUSHs (fullname);
		676	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		677	PUTBACK;
		678	call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		679	SPAGAIN;
		680
		681	FREETMPS;
		682	LEAVE;
		683	PL_runops = old_runops;
		684	}
		685
		686	if (oldcop != PL_curcop)
		687	{
		688	oldcop = PL_curcop;
		689
		690	if (PL_curcop != &PL_compiling)
		691	{
		692	runops_proc_t old_runops = PL_runops;
		693	dSP;
		694	ENTER;
		695	SAVETMPS;
		696	EXTEND (SP, 3);
		697	PL_runops = RUNOPS_DEFAULT;
		698
		699	if (oldcxix != cxstack_ix)
		700	{
		701	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		702
		703	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		704	{
		705	GV *gv = CvGV (cx->blk_sub.cv);
		706	SV *fullname = sv_2mortal (newSV (0));
		707	if (isGV (gv))
		708	gv_efullname3 (fullname, gv, 0);
		709
		710	PUSHMARK (SP);
		711	PUSHs (&PL_sv_yes);
		712	PUSHs (fullname);
		713	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		714	PUTBACK;
		715	call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		716	SPAGAIN;
		717	}
		718
		719	oldcxix = cxstack_ix;
		720	}
		721
		722	if (0) {
		723	PUSHMARK (SP);
		724	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		725	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		726	PUTBACK;
		727	call_pv ("Coro::_do_trace_line", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		728	SPAGAIN;
		729	}
		730
		731	FREETMPS;
		732	LEAVE;
		733	PL_runops = old_runops;
		734	}
		735	}
		736	}
		737
		738	TAINT_NOT;
		739	return 0;
		740	}
		741
		742	/* inject a fake call to Coro::State::_cctx_init into the execution */
		743	/* _cctx_init should be careful, as it could be called at almost any time */
		744	/* during execution of a perl program */
527	static void NOINLINE	745	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	746	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	747	{
530	dSP;	748	dSP;
531	LOGOP myop;	749	LOGOP myop;
532		750
		751	PL_top_env = &PL_start_env;
		752
		753	if (cctx->flags & CC_TRACE)
		754	PL_runops = runops_coro;
		755
533	Zero (&myop, 1, LOGOP);	756	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	757	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	758	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		759
539	PUSHMARK (SP);	760	PUSHMARK (SP);
		761	EXTEND (SP, 2);
		762	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	763	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	764	PUTBACK;
		765	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	766	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	767	SPAGAIN;
544	}	768	}
545		769
		770	/*
		771	* this is a _very_ stripped down perl interpreter ;)
		772	*/
546	static void	773	static void
547	coro_run (void *arg)	774	coro_run (void *arg)
548	{	775	{
		776	dTHX;
		777
549	/* coro_run is the alternative epilogue of transfer() */	778	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	779	UNLOCK;
551		780
		781	/* we now skip the entersub that lead to transfer() */
		782	PL_op = PL_op->op_next;
		783
		784	/* inject a fake subroutine call to cctx_init */
		785	prepare_cctx (aTHX_ (coro_cctx *)arg);
		786
		787	/* somebody or something will hit me for both perl_run and PL_restartop */
		788	PL_restartop = PL_op;
		789	perl_run (PL_curinterp);
		790
552	/*	791	/*
553	* this is a _very_ stripped down perl interpreter ;)	792	* If perl-run returns we assume exit() was being called or the coro
		793	* fell off the end, which seems to be the only valid (non-bug)
		794	* reason for perl_run to return. We try to exit by jumping to the
		795	* bootstrap-time "top" top_env, as we cannot restore the "main"
		796	* coroutine as Coro has no such concept
554	*/	797	*/
555	PL_top_env = &PL_start_env;	798	PL_top_env = main_top_env;
556		799	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
557	/* inject call to cctx_init */
558	prepare_cctx ((coro_cctx *)arg);
559
560	/* somebody will hit me for both perl_run and PL_restartop */
561	perl_run (PL_curinterp);
562
563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564	abort ();
565	}	800	}
566		801
567	static coro_cctx *	802	static coro_cctx *
568	cctx_new ()	803	cctx_new ()
569	{	804	{
570	coro_cctx *cctx;	805	coro_cctx *cctx;
		806	void *stack_start;
		807	size_t stack_size;
571		808
572	++cctx_count;	809	++cctx_count;
573		810
574	New (0, cctx, 1, coro_cctx);	811	Newz (0, cctx, 1, coro_cctx);
575		812
576	#if HAVE_MMAP	813	#if HAVE_MMAP
577		814
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	815	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	816	/* mmap supposedly does allocate-on-write for us */
580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	817	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581		818
582	if (cctx->sptr == (void *)-1)	819	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	820	{
587
588	# if STACKGUARD	821	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	822	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	823	# endif
		824	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		825	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		826	cctx->flags |= CC_MAPPED;
		827	}
		828	else
		829	#endif
		830	{
		831	cctx->ssize = coro_stacksize * (long)sizeof (long);
		832	New (0, cctx->sptr, coro_stacksize, long);
591		833
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	834	if (!cctx->sptr)
598	{	835	{
599	perror ("FATAL: unable to malloc stack for coroutine");	836	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	837	_exit (EXIT_FAILURE);
601	}	838	}
602		839
603	#endif	840	stack_start = cctx->sptr;
		841	stack_size = cctx->ssize;
		842	}
604		843
605	#if USE_VALGRIND	844	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608	cctx->ssize + (char *)cctx->sptr
609	);
610	#endif
611
612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	845	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
613		846
614	return cctx;	847	return cctx;
615	}	848	}
616		849
617	static void	850	static void
618	cctx_free (coro_cctx *cctx)	851	cctx_destroy (coro_cctx *cctx)
619	{	852	{
620	if (!cctx)	853	if (!cctx)
621	return;	854	return;
622		855
623	--cctx_count;	856	--cctx_count;
624		857
625	#if USE_VALGRIND	858	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	859	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	860	#endif
628		861
629	#if HAVE_MMAP	862	#if HAVE_MMAP
		863	if (cctx->flags & CC_MAPPED)
630	munmap (cctx->sptr, cctx->ssize);	864	munmap (cctx->sptr, cctx->ssize);
631	#else	865	else
		866	#endif
632	Safefree (cctx->sptr);	867	Safefree (cctx->sptr);
633	#endif
634		868
635	Safefree (cctx);	869	Safefree (cctx);
636	}	870	}
637		871
638	static coro_cctx *	872	static coro_cctx *
639	cctx_get ()	873	cctx_get (pTHX)
640	{	874	{
641	coro_cctx *cctx;
642
643	if (cctx_first)	875	while (cctx_first)
644	{	876	{
		877	coro_cctx *cctx = cctx_first;
		878	cctx_first = cctx->next;
645	--cctx_idle;	879	--cctx_idle;
646	cctx = cctx_first;	880
647	cctx_first = cctx->next;	881	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
648	}	882	return cctx;
649	else	883
650	{	884	cctx_destroy (cctx);
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;
653	}	885	}
654		886
655	return cctx;	887	return cctx_new ();
656	}	888	}
657		889
658	static void	890	static void
659	cctx_put (coro_cctx *cctx)	891	cctx_put (coro_cctx *cctx)
660	{	892	{
		893	/* free another cctx if overlimit */
		894	if (cctx_idle >= MAX_IDLE_CCTX)
		895	{
		896	coro_cctx *first = cctx_first;
		897	cctx_first = first->next;
		898	--cctx_idle;
		899
		900	cctx_destroy (first);
		901	}
		902
661	++cctx_idle;	903	++cctx_idle;
662	cctx->next = cctx_first;	904	cctx->next = cctx_first;
663	cctx_first = cctx;	905	cctx_first = cctx;
664	}	906	}
665		907
		908	/** coroutine switching *****************************************************/
		909
666	/* never call directly, always through the coro_state_transfer global variable */	910	/* never call directly, always through the coro_state_transfer global variable */
667	static void NOINLINE	911	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	912	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	913	{
670	dSTACKLEVEL;	914	dSTACKLEVEL;
671		915
672	/* sometimes transfer is only called to set idle_sp */	916	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	917	if (!next)
		918	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	919	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		920	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		921	}
675	else if (prev != next)	922	else if (prev != next)
676	{	923	{
677	coro_cctx *prev__cctx;	924	coro_cctx *prev__cctx;
678		925
679	if (!prev->cctx)	926	if (prev->flags & CF_NEW)
680	{	927	{
681	/* create a new empty context */	928	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	929	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	930	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	931	prev->flags |= CF_RUNNING;
685	}	932	}
686		933
		934	/*TODO: must not croak here */
687	if (!prev->flags & CF_RUNNING)	935	if (!prev->flags & CF_RUNNING)
688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	936	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689		937
690	if (next->flags & CF_RUNNING)	938	if (next->flags & CF_RUNNING)
691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	939	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692		940
		941	if (next->flags & CF_DESTROYED)
		942	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		943
693	prev->flags &= ~CF_RUNNING;	944	prev->flags &= ~CF_RUNNING;
694	next->flags |= CF_RUNNING;	945	next->flags |= CF_RUNNING;
695		946
696	LOCK;	947	LOCK;
697		948
698	if (next->mainstack)	949	if (next->flags & CF_NEW)
699	{	950	{
700	/* coroutine already started */	951	/* need to start coroutine */
701	SAVE (prev, flags);	952	next->flags &= ~CF_NEW;
702	LOAD (next);	953	/* first get rid of the old state */
		954	save_perl (aTHX_ prev);
		955	/* setup coroutine call */
		956	setup_coro (aTHX_ next);
703	}	957	}
704	else	958	else
705	{	959	{
706	/* need to start coroutine */	960	/* coroutine already started */
707	/* first get rid of the old state */	961	save_perl (aTHX_ prev);
708	SAVE (prev, -1);	962	load_perl (aTHX_ next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	963	}
714		964
715	prev__cctx = prev->cctx;	965	prev__cctx = prev->cctx;
716		966
717	/* possibly "free" the cctx */	967	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	968	if (prev__cctx->idle_sp == STACKLEVEL)
719	{	969	{
720	assert (PL_top_env == prev__cctx->top_env);	970	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		971	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		972
		973	prev->cctx = 0;
721		974
722	cctx_put (prev__cctx);	975	cctx_put (prev__cctx);
723	prev->cctx = 0;
724	}	976	}
725	else if (prev__cctx->idle_sp) //D
726	fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D
727		977
728	if (!next->cctx)	978	if (!next->cctx)
729	next->cctx = cctx_get ();	979	next->cctx = cctx_get (aTHX);
730		980
731	if (prev__cctx != next->cctx)	981	if (prev__cctx != next->cctx)
732	{	982	{
733	assert ( prev__cctx->inuse);
734	assert (!next->cctx->inuse);
735
736	prev__cctx->inuse = 0;
737	next->cctx->inuse = 1;
738
739	prev__cctx->top_env = PL_top_env;	983	prev__cctx->top_env = PL_top_env;
740	PL_top_env = next->cctx->top_env;	984	PL_top_env = next->cctx->top_env;
741	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	985	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742	}	986	}
743		987
744	free_coro_mortal ();	988	free_coro_mortal (aTHX);
745
746	UNLOCK;	989	UNLOCK;
747	}	990	}
748	}	991	}
749		992
750	struct transfer_args	993	struct transfer_args
751	{	994	{
752	struct coro *prev, *next;	995	struct coro *prev, *next;
753	int flags;
754	};	996	};
755		997
756	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	998	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
757		999
		1000	/** high level stuff ********************************************************/
		1001
758	static void	1002	static int
759	coro_state_destroy (struct coro *coro)	1003	coro_state_destroy (pTHX_ struct coro *coro)
760	{	1004	{
761	if (coro->refcnt--)	1005	if (coro->flags & CF_DESTROYED)
762	return;	1006	return 0;
763		1007
		1008	coro->flags |= CF_DESTROYED;
		1009
764	if (coro->flags & CF_RUNNING)	1010	if (coro->flags & CF_READY)
765	croak ("FATAL: tried to destroy currently running coroutine");	1011	{
		1012	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1013	/* alternative: look through all ready queues and remove the coro */
		1014	LOCK;
		1015	--coro_nready;
		1016	UNLOCK;
		1017	}
		1018	else
		1019	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
766		1020
767	if (coro->mainstack && coro->mainstack != main_mainstack)	1021	if (coro->mainstack && coro->mainstack != main_mainstack)
768	{	1022	{
769	struct coro temp;	1023	struct coro temp;
770		1024
771	SAVE ((&temp), TRANSFER_SAVE_ALL);	1025	assert (!(coro->flags & CF_RUNNING));
772	LOAD (coro);
773		1026
		1027	Zero (&temp, 1, struct coro);
		1028	temp.save = CORO_SAVE_ALL;
		1029
		1030	if (coro->flags & CF_RUNNING)
		1031	croak ("FATAL: tried to destroy currently running coroutine");
		1032
		1033	save_perl (aTHX_ &temp);
		1034	load_perl (aTHX_ coro);
		1035
774	coro_destroy_stacks ();	1036	coro_destroy_stacks (aTHX);
775		1037
776	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1038	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
777		1039
778	coro->mainstack = 0;	1040	coro->mainstack = 0;
779	}	1041	}
780		1042
781	cctx_free (coro->cctx);	1043	cctx_destroy (coro->cctx);
782	SvREFCNT_dec (coro->args);	1044	SvREFCNT_dec (coro->args);
783	Safefree (coro);	1045
		1046	if (coro->next) coro->next->prev = coro->prev;
		1047	if (coro->prev) coro->prev->next = coro->next;
		1048	if (coro == coro_first) coro_first = coro->next;
		1049
		1050	return 1;
784	}	1051	}
785		1052
786	static int	1053	static int
787	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1054	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
788	{	1055	{
789	struct coro *coro = (struct coro *)mg->mg_ptr;	1056	struct coro *coro = (struct coro *)mg->mg_ptr;
790	mg->mg_ptr = 0;	1057	mg->mg_ptr = 0;
791		1058
		1059	coro->hv = 0;
		1060
		1061	if (--coro->refcnt < 0)
		1062	{
792	coro_state_destroy (coro);	1063	coro_state_destroy (aTHX_ coro);
		1064	Safefree (coro);
		1065	}
793		1066
794	return 0;	1067	return 0;
795	}	1068	}
796		1069
797	static int	1070	static int
…		…
804	return 0;	1077	return 0;
805	}	1078	}
806		1079
807	static MGVTBL coro_state_vtbl = {	1080	static MGVTBL coro_state_vtbl = {
808	0, 0, 0, 0,	1081	0, 0, 0, 0,
809	coro_state_clear,	1082	coro_state_free,
810	0,	1083	0,
811	#ifdef MGf_DUP	1084	#ifdef MGf_DUP
812	coro_state_dup,	1085	coro_state_dup,
813	#else	1086	#else
814	# define MGf_DUP 0	1087	# define MGf_DUP 0
815	#endif	1088	#endif
816	};	1089	};
817		1090
818	static struct coro *	1091	static struct coro *
819	SvSTATE (SV *coro)	1092	SvSTATE_ (pTHX_ SV *coro)
820	{	1093	{
821	HV *stash;	1094	HV *stash;
822	MAGIC *mg;	1095	MAGIC *mg;
823		1096
824	if (SvROK (coro))	1097	if (SvROK (coro))
…		…
830	/* very slow, but rare, check */	1103	/* very slow, but rare, check */
831	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	1104	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
832	croak ("Coro::State object required");	1105	croak ("Coro::State object required");
833	}	1106	}
834		1107
835	mg = SvMAGIC (coro);	1108	mg = CORO_MAGIC (coro);
836	assert (mg->mg_type == PERL_MAGIC_ext);
837	return (struct coro *)mg->mg_ptr;	1109	return (struct coro *)mg->mg_ptr;
838	}	1110	}
839		1111
		1112	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1113
840	static void	1114	static void
841	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1115	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
842	{	1116	{
843	ta->prev = SvSTATE (prev);	1117	ta->prev = SvSTATE (prev_sv);
844	ta->next = SvSTATE (next);	1118	ta->next = SvSTATE (next_sv);
845	ta->flags = flags;
846	}	1119	}
847		1120
848	static void	1121	static void
849	api_transfer (SV *prev, SV *next, int flags)	1122	api_transfer (SV *prev_sv, SV *next_sv)
850	{	1123	{
851	dTHX;	1124	dTHX;
852	struct transfer_args ta;	1125	struct transfer_args ta;
853		1126
854	prepare_transfer (&ta, prev, next, flags);	1127	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
855	TRANSFER (ta);	1128	TRANSFER (ta);
856	}	1129	}
857		1130
		1131	static int
		1132	api_save (SV *coro_sv, int new_save)
		1133	{
		1134	dTHX;
		1135	struct coro *coro = SvSTATE (coro_sv);
		1136	int old_save = coro->save;
		1137
		1138	if (new_save >= 0)
		1139	coro->save = new_save;
		1140
		1141	return old_save;
		1142	}
		1143
858	/** Coro ********************************************************************/	1144	/** Coro ********************************************************************/
859		1145
860	#define PRIO_MAX 3
861	#define PRIO_HIGH 1
862	#define PRIO_NORMAL 0
863	#define PRIO_LOW -1
864	#define PRIO_IDLE -3
865	#define PRIO_MIN -4
866
867	/* for Coro.pm */
868	static GV *coro_current, *coro_idle;
869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870	static int coro_nready;
871
872	static void	1146	static void
873	coro_enq (SV *coro_sv)	1147	coro_enq (pTHX_ SV *coro_sv)
874	{	1148	{
875	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1149	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	1150	}
878		1151
879	static SV *	1152	static SV *
880	coro_deq (int min_prio)	1153	coro_deq (pTHX_ int min_prio)
881	{	1154	{
882	int prio = PRIO_MAX - PRIO_MIN;	1155	int prio = PRIO_MAX - PRIO_MIN;
883		1156
884	min_prio -= PRIO_MIN;	1157	min_prio -= PRIO_MIN;
885	if (min_prio < 0)	1158	if (min_prio < 0)
886	min_prio = 0;	1159	min_prio = 0;
887		1160
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1161	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1162	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1163	return av_shift (coro_ready [prio]);
893	}
894		1164
895	return 0;	1165	return 0;
896	}	1166	}
897		1167
898	static int	1168	static int
899	api_ready (SV *coro_sv)	1169	api_ready (SV *coro_sv)
900	{	1170	{
		1171	dTHX;
901	struct coro *coro;	1172	struct coro *coro;
902		1173
903	if (SvROK (coro_sv))	1174	if (SvROK (coro_sv))
904	coro_sv = SvRV (coro_sv);	1175	coro_sv = SvRV (coro_sv);
905		1176
906	coro = SvSTATE (coro_sv);	1177	coro = SvSTATE (coro_sv);
907		1178
908	if (coro->flags & CF_READY)	1179	if (coro->flags & CF_READY)
909	return 0;	1180	return 0;
910		1181
911	if (coro->flags & CF_RUNNING)
912	croak ("Coro::ready called on currently running coroutine");
913
914	coro->flags |= CF_READY;	1182	coro->flags |= CF_READY;
915		1183
916	LOCK;	1184	LOCK;
917	coro_enq (SvREFCNT_inc (coro_sv));	1185	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1186	++coro_nready;
918	UNLOCK;	1187	UNLOCK;
919		1188
920	return 1;	1189	return 1;
921	}	1190	}
922		1191
923	static int	1192	static int
924	api_is_ready (SV *coro_sv)	1193	api_is_ready (SV *coro_sv)
925	{	1194	{
		1195	dTHX;
926	return !!SvSTATE (coro_sv)->flags & CF_READY;	1196	return !!(SvSTATE (coro_sv)->flags & CF_READY);
927	}	1197	}
928		1198
929	static void	1199	static void
930	prepare_schedule (struct transfer_args *ta)	1200	prepare_schedule (pTHX_ struct transfer_args *ta)
931	{	1201	{
932	SV *current, *prev, *next;	1202	SV *prev_sv, *next_sv;
933
934	current = GvSV (coro_current);
935		1203
936	for (;;)	1204	for (;;)
937	{	1205	{
938	LOCK;	1206	LOCK;
939	next = coro_deq (PRIO_MIN);	1207	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1208
		1209	/* nothing to schedule: call the idle handler */
		1210	if (!next_sv)
		1211	{
		1212	dSP;
		1213	UNLOCK;
		1214
		1215	ENTER;
		1216	SAVETMPS;
		1217
		1218	PUSHMARK (SP);
		1219	PUTBACK;
		1220	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1221
		1222	FREETMPS;
		1223	LEAVE;
		1224	continue;
		1225	}
		1226
		1227	ta->next = SvSTATE (next_sv);
		1228
		1229	/* cannot transfer to destroyed coros, skip and look for next */
		1230	if (ta->next->flags & CF_DESTROYED)
		1231	{
		1232	UNLOCK;
		1233	SvREFCNT_dec (next_sv);
		1234	/* coro_nready is already taken care of by destroy */
		1235	continue;
		1236	}
		1237
		1238	--coro_nready;
940	UNLOCK;	1239	UNLOCK;
941
942	if (next)
943	break;	1240	break;
944
945	{
946	dSP;
947
948	ENTER;
949	SAVETMPS;
950
951	PUSHMARK (SP);
952	PUTBACK;
953	call_sv (GvSV (coro_idle), G_DISCARD);
954
955	FREETMPS;
956	LEAVE;
957	}	1241	}
958	}
959
960	prev = SvRV (current);
961	SvRV (current) = next;
962		1242
963	/* free this only after the transfer */	1243	/* free this only after the transfer */
		1244	prev_sv = SvRV (coro_current);
		1245	SvRV_set (coro_current, next_sv);
		1246	ta->prev = SvSTATE (prev_sv);
		1247
		1248	assert (ta->next->flags & CF_READY);
		1249	ta->next->flags &= ~CF_READY;
		1250
964	LOCK;	1251	LOCK;
965	free_coro_mortal ();	1252	free_coro_mortal (aTHX);
		1253	coro_mortal = prev_sv;
966	UNLOCK;	1254	UNLOCK;
967	coro_mortal = prev;
968
969	ta->prev = SvSTATE (prev);
970	ta->next = SvSTATE (next);
971	ta->flags = TRANSFER_SAVE_ALL;
972
973	ta->next->flags &= ~CF_READY;
974	}	1255	}
975		1256
976	static void	1257	static void
977	prepare_cede (struct transfer_args *ta)	1258	prepare_cede (pTHX_ struct transfer_args *ta)
978	{	1259	{
979	api_ready (GvSV (coro_current));	1260	api_ready (coro_current);
980
981	prepare_schedule (ta);	1261	prepare_schedule (aTHX_ ta);
		1262	}
		1263
		1264	static int
		1265	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1266	{
		1267	if (coro_nready)
		1268	{
		1269	SV *prev = SvRV (coro_current);
		1270	prepare_schedule (aTHX_ ta);
		1271	api_ready (prev);
		1272	return 1;
		1273	}
		1274	else
		1275	return 0;
982	}	1276	}
983		1277
984	static void	1278	static void
985	api_schedule (void)	1279	api_schedule (void)
986	{	1280	{
987	dTHX;	1281	dTHX;
988	struct transfer_args ta;	1282	struct transfer_args ta;
989		1283
990	prepare_schedule (&ta);	1284	prepare_schedule (aTHX_ &ta);
991	TRANSFER (ta);	1285	TRANSFER (ta);
992	}	1286	}
993		1287
994	static void	1288	static int
995	api_cede (void)	1289	api_cede (void)
996	{	1290	{
997	dTHX;	1291	dTHX;
998	struct transfer_args ta;	1292	struct transfer_args ta;
999		1293
1000	prepare_cede (&ta);	1294	prepare_cede (aTHX_ &ta);
		1295
		1296	if (ta.prev != ta.next)
		1297	{
1001	TRANSFER (ta);	1298	TRANSFER (ta);
		1299	return 1;
		1300	}
		1301	else
		1302	return 0;
		1303	}
		1304
		1305	static int
		1306	api_cede_notself (void)
		1307	{
		1308	dTHX;
		1309	struct transfer_args ta;
		1310
		1311	if (prepare_cede_notself (aTHX_ &ta))
		1312	{
		1313	TRANSFER (ta);
		1314	return 1;
		1315	}
		1316	else
		1317	return 0;
1002	}	1318	}
1003		1319
1004	MODULE = Coro::State PACKAGE = Coro::State	1320	MODULE = Coro::State PACKAGE = Coro::State
1005		1321
1006	PROTOTYPES: DISABLE	1322	PROTOTYPES: DISABLE
…		…
1012	#endif	1328	#endif
1013	BOOT_PAGESIZE;	1329	BOOT_PAGESIZE;
1014		1330
1015	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1331	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1016		1332
		1333	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1334	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1335	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1336	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1337
1017	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1338	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1018	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1339	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1019	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1340	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1341	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1342	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1343	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1344	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1020		1345
1021	main_mainstack = PL_mainstack;	1346	main_mainstack = PL_mainstack;
		1347	main_top_env = PL_top_env;
		1348
		1349	while (main_top_env->je_prev)
		1350	main_top_env = main_top_env->je_prev;
1022		1351
1023	coroapi.ver = CORO_API_VERSION;	1352	coroapi.ver = CORO_API_VERSION;
1024	coroapi.transfer = api_transfer;	1353	coroapi.transfer = api_transfer;
1025		1354
1026	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1355	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1034	HV *hv;	1363	HV *hv;
1035	int i;	1364	int i;
1036		1365
1037	Newz (0, coro, 1, struct coro);	1366	Newz (0, coro, 1, struct coro);
1038	coro->args = newAV ();	1367	coro->args = newAV ();
		1368	coro->save = CORO_SAVE_DEF;
		1369	coro->flags = CF_NEW;
1039		1370
		1371	if (coro_first) coro_first->prev = coro;
		1372	coro->next = coro_first;
		1373	coro_first = coro;
		1374
1040	hv = newHV ();	1375	coro->hv = hv = newHV ();
1041	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1376	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1042	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1377	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1043		1378
1044	for (i = 1; i < items; i++)	1379	for (i = 1; i < items; i++)
1045	av_push (coro->args, newSVsv (ST (i)));	1380	av_push (coro->args, newSVsv (ST (i)));
1046	}	1381	}
1047	OUTPUT:	1382	OUTPUT:
		1383	RETVAL
		1384
		1385	int
		1386	save (SV *coro, int new_save = -1)
		1387	CODE:
		1388	RETVAL = api_save (coro, new_save);
		1389	OUTPUT:
		1390	RETVAL
		1391
		1392	int
		1393	save_also (SV *coro_sv, int save_also)
		1394	CODE:
		1395	{
		1396	struct coro *coro = SvSTATE (coro_sv);
		1397	RETVAL = coro->save;
		1398	coro->save |= save_also;
		1399	}
		1400	OUTPUT:
1048	RETVAL	1401	RETVAL
1049		1402
1050	void	1403	void
1051	_set_stacklevel (...)	1404	_set_stacklevel (...)
1052	ALIAS:	1405	ALIAS:
1053	Coro::State::transfer = 1	1406	Coro::State::transfer = 1
1054	Coro::schedule = 2	1407	Coro::schedule = 2
1055	Coro::cede = 3	1408	Coro::cede = 3
1056	Coro::Cont::yield = 4	1409	Coro::cede_notself = 4
1057	CODE:	1410	CODE:
1058	{	1411	{
1059	struct transfer_args ta;	1412	struct transfer_args ta;
1060		1413
1061	switch (ix)	1414	switch (ix)
1062	{	1415	{
1063	case 0:	1416	case 0:
1064	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1417	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1065	ta.next = 0;	1418	ta.next = 0;
1066	ta.flags = TRANSFER_SET_STACKLEVEL;
1067	break;	1419	break;
1068		1420
1069	case 1:	1421	case 1:
1070	if (items != 3)	1422	if (items != 2)
1071	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1423	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1072		1424
1073	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1425	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1074	break;	1426	break;
1075		1427
1076	case 2:	1428	case 2:
1077	prepare_schedule (&ta);	1429	prepare_schedule (aTHX_ &ta);
1078	break;	1430	break;
1079		1431
1080	case 3:	1432	case 3:
1081	prepare_cede (&ta);	1433	prepare_cede (aTHX_ &ta);
1082	break;	1434	break;
1083		1435
1084	case 4:	1436	case 4:
1085	{	1437	if (!prepare_cede_notself (aTHX_ &ta))
1086	SV *yieldstack;	1438	XSRETURN_EMPTY;
1087	SV *sv;
1088	AV *defav = GvAV (PL_defgv);
1089		1439
1090	yieldstack = *hv_fetch (
1091	(HV *)SvRV (GvSV (coro_current)),
1092	"yieldstack", sizeof ("yieldstack") - 1,
1093	0
1094	);
1095
1096	/* set up @_ -- ugly */
1097	av_clear (defav);
1098	av_fill (defav, items - 1);
1099	while (items--)
1100	av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102	sv = av_pop ((AV *)SvRV (yieldstack));
1103	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1104	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1105	ta.flags = 0;
1106	SvREFCNT_dec (sv);
1107	}
1108	break;	1440	break;
1109
1110	}	1441	}
1111		1442
		1443	BARRIER;
1112	TRANSFER (ta);	1444	TRANSFER (ta);
1113	}
1114		1445
1115	void	1446	if (GIMME_V != G_VOID && ta.next != ta.prev)
1116	_clone_state_from (SV *dst, SV *src)	1447	XSRETURN_YES;
		1448	}
		1449
		1450	bool
		1451	_destroy (SV *coro_sv)
1117	CODE:	1452	CODE:
1118	{	1453	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1119	struct coro *coro_src = SvSTATE (src);	1454	OUTPUT:
1120		1455	RETVAL
1121	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1122
1123	++coro_src->refcnt;
1124	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1125	}
1126		1456
1127	void	1457	void
1128	_exit (code)	1458	_exit (code)
1129	int code	1459	int code
1130	PROTOTYPE: $	1460	PROTOTYPE: $
1131	CODE:	1461	CODE:
1132	_exit (code);	1462	_exit (code);
1133		1463
1134	int	1464	int
		1465	cctx_stacksize (int new_stacksize = 0)
		1466	CODE:
		1467	RETVAL = coro_stacksize;
		1468	if (new_stacksize)
		1469	coro_stacksize = new_stacksize;
		1470	OUTPUT:
		1471	RETVAL
		1472
		1473	int
1135	cctx_count ()	1474	cctx_count ()
1136	CODE:	1475	CODE:
1137	RETVAL = cctx_count;	1476	RETVAL = cctx_count;
1138	OUTPUT:	1477	OUTPUT:
1139	RETVAL	1478	RETVAL
…		…
1143	CODE:	1482	CODE:
1144	RETVAL = cctx_idle;	1483	RETVAL = cctx_idle;
1145	OUTPUT:	1484	OUTPUT:
1146	RETVAL	1485	RETVAL
1147		1486
		1487	void
		1488	list ()
		1489	PPCODE:
		1490	{
		1491	struct coro *coro;
		1492	for (coro = coro_first; coro; coro = coro->next)
		1493	if (coro->hv)
		1494	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1495	}
		1496
		1497	void
		1498	call (Coro::State coro, SV *coderef)
		1499	ALIAS:
		1500	eval = 1
		1501	CODE:
		1502	{
		1503	if (coro->mainstack)
		1504	{
		1505	struct coro temp;
		1506	Zero (&temp, 1, struct coro);
		1507	temp.save = CORO_SAVE_ALL;
		1508
		1509	if (!(coro->flags & CF_RUNNING))
		1510	{
		1511	save_perl (aTHX_ &temp);
		1512	load_perl (aTHX_ coro);
		1513	}
		1514
		1515	{
		1516	dSP;
		1517	ENTER;
		1518	SAVETMPS;
		1519	PUSHMARK (SP);
		1520	PUTBACK;
		1521	if (ix)
		1522	eval_sv (coderef, 0);
		1523	else
		1524	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1525	SPAGAIN;
		1526	FREETMPS;
		1527	LEAVE;
		1528	PUTBACK;
		1529	}
		1530
		1531	if (!(coro->flags & CF_RUNNING))
		1532	{
		1533	save_perl (aTHX_ coro);
		1534	load_perl (aTHX_ &temp);
		1535	}
		1536	}
		1537	}
		1538
		1539	SV *
		1540	is_ready (Coro::State coro)
		1541	PROTOTYPE: $
		1542	ALIAS:
		1543	is_ready = CF_READY
		1544	is_running = CF_RUNNING
		1545	is_new = CF_NEW
		1546	is_destroyed = CF_DESTROYED
		1547	CODE:
		1548	RETVAL = boolSV (coro->flags & ix);
		1549	OUTPUT:
		1550	RETVAL
		1551
		1552	void
		1553	trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1554	CODE:
		1555	if (flags & CC_TRACE)
		1556	{
		1557	if (!coro->cctx)
		1558	coro->cctx = cctx_new ();
		1559	else if (!(coro->cctx->flags & CC_TRACE))
		1560	croak ("cannot enable tracing on coroutine with custom stack");
		1561
		1562	coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
		1563	}
		1564	else
		1565	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1566	{
		1567	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1568	coro->cctx->flags |= CC_NOREUSE;
		1569	}
		1570
		1571	SV *
		1572	has_stack (Coro::State coro)
		1573	PROTOTYPE: $
		1574	CODE:
		1575	RETVAL = boolSV (!!coro->cctx);
		1576	OUTPUT:
		1577	RETVAL
		1578
		1579	int
		1580	is_traced (Coro::State coro)
		1581	PROTOTYPE: $
		1582	CODE:
		1583	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1584	OUTPUT:
		1585	RETVAL
		1586
		1587	IV
		1588	rss (Coro::State coro)
		1589	PROTOTYPE: $
		1590	CODE:
		1591	RETVAL = coro_rss (coro);
		1592	OUTPUT:
		1593	RETVAL
		1594
		1595
1148	MODULE = Coro::State PACKAGE = Coro	1596	MODULE = Coro::State PACKAGE = Coro
1149		1597
1150	BOOT:	1598	BOOT:
1151	{	1599	{
1152	int i;	1600	int i;
		1601
		1602	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1603	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1604	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1605
		1606	coro_current = get_sv ("Coro::current", FALSE);
		1607	SvREADONLY_on (coro_current);
1153		1608
1154	coro_stash = gv_stashpv ("Coro", TRUE);	1609	coro_stash = gv_stashpv ("Coro", TRUE);
1155		1610
1156	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1611	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1157	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1612	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1158	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1613	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1159	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1614	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1160	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1615	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1161	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1616	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1162		1617
1163	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1164	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1165
1166	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1618	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1167	coro_ready[i] = newAV ();	1619	coro_ready[i] = newAV ();
1168		1620
1169	{	1621	{
1170	SV *sv = perl_get_sv("Coro::API", 1);	1622	SV *sv = perl_get_sv("Coro::API", 1);
1171		1623
1172	coroapi.schedule = api_schedule;	1624	coroapi.schedule = api_schedule;
		1625	coroapi.save = api_save;
1173	coroapi.cede = api_cede;	1626	coroapi.cede = api_cede;
		1627	coroapi.cede_notself = api_cede_notself;
1174	coroapi.ready = api_ready;	1628	coroapi.ready = api_ready;
1175	coroapi.is_ready = api_is_ready;	1629	coroapi.is_ready = api_is_ready;
1176	coroapi.nready = &coro_nready;	1630	coroapi.nready = &coro_nready;
1177	coroapi.current = coro_current;	1631	coroapi.current = coro_current;
1178		1632
1179	GCoroAPI = &coroapi;	1633	GCoroAPI = &coroapi;
1180	sv_setiv (sv, (IV)&coroapi);	1634	sv_setiv (sv, (IV)&coroapi);
1181	SvREADONLY_on (sv);	1635	SvREADONLY_on (sv);
1182	}	1636	}
1183	}	1637	}
		1638
		1639	void
		1640	_set_current (SV *current)
		1641	PROTOTYPE: $
		1642	CODE:
		1643	SvREFCNT_dec (SvRV (coro_current));
		1644	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1184		1645
1185	int	1646	int
1186	prio (Coro::State coro, int newprio = 0)	1647	prio (Coro::State coro, int newprio = 0)
1187	ALIAS:	1648	ALIAS:
1188	nice = 1	1649	nice = 1
…		…
1191	RETVAL = coro->prio;	1652	RETVAL = coro->prio;
1192		1653
1193	if (items > 1)	1654	if (items > 1)
1194	{	1655	{
1195	if (ix)	1656	if (ix)
1196	newprio += coro->prio;	1657	newprio = coro->prio - newprio;
1197		1658
1198	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1659	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1199	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1660	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1200		1661
1201	coro->prio = newprio;	1662	coro->prio = newprio;
1202	}	1663	}
1203	}	1664	}
		1665	OUTPUT:
		1666	RETVAL
1204		1667
1205	SV *	1668	SV *
1206	ready (SV *self)	1669	ready (SV *self)
1207	PROTOTYPE: $	1670	PROTOTYPE: $
1208	CODE:	1671	CODE:
1209	RETVAL = boolSV (api_ready (self));	1672	RETVAL = boolSV (api_ready (self));
1210	OUTPUT:	1673	OUTPUT:
1211	RETVAL	1674	RETVAL
1212		1675
1213	SV *
1214	is_ready (SV *self)
1215	PROTOTYPE: $
1216	CODE:
1217	RETVAL = boolSV (api_is_ready (self));
1218	OUTPUT:
1219	RETVAL
1220
1221	int	1676	int
1222	nready (...)	1677	nready (...)
1223	PROTOTYPE:	1678	PROTOTYPE:
1224	CODE:	1679	CODE:
1225	RETVAL = coro_nready;	1680	RETVAL = coro_nready;
1226	OUTPUT:	1681	OUTPUT:
1227	RETVAL	1682	RETVAL
1228		1683
		1684	# for async_pool speedup
		1685	void
		1686	_pool_1 (SV *cb)
		1687	CODE:
		1688	{
		1689	int i, len;
		1690	HV *hv = (HV *)SvRV (coro_current);
		1691	AV *defav = GvAV (PL_defgv);
		1692	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1693	AV *invoke_av;
		1694
		1695	if (!invoke)
		1696	croak ("\3terminate\2\n");
		1697
		1698	hv_store (hv, "desc", sizeof ("desc") - 1,
		1699	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1700
		1701	invoke_av = (AV *)SvRV (invoke);
		1702	len = av_len (invoke_av);
		1703
		1704	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1705
		1706	if (len > 0)
		1707	{
		1708	av_fill (defav, len - 1);
		1709	for (i = 0; i < len; ++i)
		1710	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1711	}
		1712
		1713	SvREFCNT_dec (invoke);
		1714	}
		1715
		1716	void
		1717	_pool_2 (SV *cb)
		1718	CODE:
		1719	{
		1720	struct coro *coro = SvSTATE (coro_current);
		1721
		1722	sv_setsv (cb, &PL_sv_undef);
		1723
		1724	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1725	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1726	croak ("\3terminate\2\n");
		1727
		1728	av_clear (GvAV (PL_defgv));
		1729	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1730	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1731	coro->save = CORO_SAVE_DEF;
		1732	coro->prio = 0;
		1733	av_push (av_async_pool, newSVsv (coro_current));
		1734	}
		1735
		1736
1229	MODULE = Coro::State PACKAGE = Coro::AIO	1737	MODULE = Coro::State PACKAGE = Coro::AIO
1230		1738
1231	SV *	1739	SV *
1232	_get_state ()	1740	_get_state ()
1233	CODE:	1741	CODE:
1234	{	1742	{
1235	struct {	1743	struct io_state *data;
1236	int errorno;
1237	int laststype;
1238	int laststatval;
1239	Stat_t statcache;
1240	} data;
1241		1744
		1745	RETVAL = newSV (sizeof (struct io_state));
		1746	data = (struct io_state *)SvPVX (RETVAL);
		1747	SvCUR_set (RETVAL, sizeof (struct io_state));
		1748	SvPOK_only (RETVAL);
		1749
1242	data.errorno = errno;	1750	data->errorno = errno;
1243	data.laststype = PL_laststype;	1751	data->laststype = PL_laststype;
1244	data.laststatval = PL_laststatval;	1752	data->laststatval = PL_laststatval;
1245	data.statcache = PL_statcache;	1753	data->statcache = PL_statcache;
1246
1247	RETVAL = newSVpvn ((char *)&data, sizeof data);
1248	}	1754	}
1249	OUTPUT:	1755	OUTPUT:
1250	RETVAL	1756	RETVAL
1251		1757
1252	void	1758	void
1253	_set_state (char *data_)	1759	_set_state (char *data_)
1254	PROTOTYPE: $	1760	PROTOTYPE: $
1255	CODE:	1761	CODE:
1256	{	1762	{
1257	struct {	1763	struct io_state *data = (void *)data_;
1258	int errorno;
1259	int laststype;
1260	int laststatval;
1261	Stat_t statcache;
1262	} *data = (void *)data_;
1263		1764
1264	errno = data->errorno;	1765	errno = data->errorno;
1265	PL_laststype = data->laststype;	1766	PL_laststype = data->laststype;
1266	PL_laststatval = data->laststatval;	1767	PL_laststatval = data->laststatval;
1267	PL_statcache = data->statcache;	1768	PL_statcache = data->statcache;
1268	}	1769	}
		1770

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