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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs.
Revision 1.175 by root, Sun Sep 30 13:43:45 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	#if USE_VALGRIND	168	#if CORO_USE_VALGRIND
125	int valgrind_id;	169	int valgrind_id;
126	#endif	170	#endif
		171	unsigned char flags;
127	} coro_cctx;	172	} coro_cctx;
		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		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 */
		179	};
128		180
129	/* this is a structure representing a perl-level coroutine */	181	/* this is a structure representing a perl-level coroutine */
130	struct coro {	182	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	183	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	184	coro_cctx *cctx;
133		185
134	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
135	AV *args;	187	AV *args;
136	int refcnt;	188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
137		191
138	/* optionally saved, might be zero */	192	/* optionally saved, might be zero */
139	AV *defav;	193	AV *defav; /* @_ */
140	SV *defsv;	194	SV *defsv; /* $_ */
141	SV *errsv;	195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
142		199
143	#define VAR(name,type) type name;	200	#define VAR(name,type) type name;
144	# include "state.h"	201	# include "state.h"
145	#undef VAR	202	#undef VAR
146		203
		204	/* statistics */
		205	int usecount; /* number of switches to this coro */
		206
147	/* coro process data */	207	/* coro process data */
148	int prio;	208	int prio;
		209
		210	/* linked list */
		211	struct coro *next, *prev;
		212	HV *hv; /* the perl hash associated with this coro, if any */
149	};	213	};
150		214
151	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
153		217
		218	/** Coro ********************************************************************/
		219
		220	#define PRIO_MAX 3
		221	#define PRIO_HIGH 1
		222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/** lowlevel stuff **********************************************************/
		234
154	static AV *	235	static AV *
155	coro_clone_padlist (CV *cv)	236	coro_clone_padlist (pTHX_ CV *cv)
156	{	237	{
157	AV *padlist = CvPADLIST (cv);	238	AV *padlist = CvPADLIST (cv);
158	AV *newpadlist, *newpad;	239	AV *newpadlist, *newpad;
159		240
160	newpadlist = newAV ();	241	newpadlist = newAV ();
…		…
172		253
173	return newpadlist;	254	return newpadlist;
174	}	255	}
175		256
176	static void	257	static void
177	free_padlist (AV *padlist)	258	free_padlist (pTHX_ AV *padlist)
178	{	259	{
179	/* may be during global destruction */	260	/* may be during global destruction */
180	if (SvREFCNT (padlist))	261	if (SvREFCNT (padlist))
181	{	262	{
182	I32 i = AvFILLp (padlist);	263	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	284	AV *padlist;
204	AV *av = (AV *)mg->mg_obj;	285	AV *av = (AV *)mg->mg_obj;
205		286
206	/* casting is fun. */	287	/* casting is fun. */
207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	288	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208	free_padlist (padlist);	289	free_padlist (aTHX_ padlist);
209		290
210	SvREFCNT_dec (av);	291	SvREFCNT_dec (av);
211		292
212	return 0;	293	return 0;
213	}	294	}
214		295
215	#define PERL_MAGIC_coro PERL_MAGIC_ext	296	#define PERL_MAGIC_coro PERL_MAGIC_ext
216		297
217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	298	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		299
		300	#define CORO_MAGIC(cv) \
		301	SvMAGIC (cv) \
		302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		303	? SvMAGIC (cv) \
		304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		305	: 0
		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
218		332
219	/* the next two functions merely cache the padlists */	333	/* the next two functions merely cache the padlists */
220	static void	334	static void
221	get_padlist (CV *cv)	335	get_padlist (pTHX_ CV *cv)
222	{	336	{
223	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	337	MAGIC *mg = CORO_MAGIC (cv);
		338	AV *av;
224		339
225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
226	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
227	else	342	else
228	{	343	{
229	#if 0	344	#if CORO_PREFER_PERL_FUNCTIONS
230	/* this is probably cleaner, but also slower? */	345	/* this is probably cleaner, but also slower? */
231	CV *cp = Perl_cv_clone (cv);	346	CV *cp = Perl_cv_clone (cv);
232	CvPADLIST (cv) = CvPADLIST (cp);	347	CvPADLIST (cv) = CvPADLIST (cp);
233	CvPADLIST (cp) = 0;	348	CvPADLIST (cp) = 0;
234	SvREFCNT_dec (cp);	349	SvREFCNT_dec (cp);
235	#else	350	#else
236	CvPADLIST (cv) = coro_clone_padlist (cv);	351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
237	#endif	352	#endif
238	}	353	}
239	}	354	}
240		355
241	static void	356	static void
242	put_padlist (CV *cv)	357	put_padlist (pTHX_ CV *cv)
243	{	358	{
244	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	359	MAGIC *mg = CORO_MAGIC (cv);
		360	AV *av;
245		361
246	if (!mg)	362	if (!mg)
247	{	363	{
248	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	364	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
249	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	365	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
250	mg->mg_virtual = &vtbl_coro;	366	mg->mg_virtual = &vtbl_coro;
251	mg->mg_obj = (SV *)newAV ();	367	mg->mg_obj = (SV *)newAV ();
252	}	368	}
253		369
254	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	370	av = (AV *)mg->mg_obj;
		371
		372	if (AvFILLp (av) >= AvMAX (av))
		373	av_extend (av, AvMAX (av) + 1);
		374
		375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
255	}	376	}
		377
		378	/** load & save, init *******************************************************/
256		379
257	#define SB do {	380	#define SB do {
258	#define SE } while (0)	381	#define SE } while (0)
259		382
260	#define LOAD(state) load_state((state));
261	#define SAVE(state,flags) save_state((state),(flags));
262
263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
264		384
265	static void	385	static void
266	load_state(Coro__State c)	386	load_perl (pTHX_ Coro__State c)
267	{	387	{
268	#define VAR(name,type) PL_ ## name = c->name;	388	#define VAR(name,type) PL_ ## name = c->name;
269	# include "state.h"	389	# include "state.h"
270	#undef VAR	390	#undef VAR
271		391
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		400	{
		401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
		403	}
		404	else
		405	{
		406	REPLACE_SV (PL_rs, c->irssv);
		407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		408	sv_setsv (c->irssv_sv, PL_rs);
		409	}
		410	}
275		411
276	{	412	{
277	dSP;	413	dSP;
278	CV *cv;	414	CV *cv;
279		415
280	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
281	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
282	{	418	{
283	AV *padlist = (AV *)POPs;
284
285	if (padlist)
286	{
287	put_padlist (cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
288	CvPADLIST(cv) = padlist;	420	CvDEPTH (cv) = PTR2IV (POPs);
289	}	421	CvPADLIST (cv) = (AV *)POPs;
290
291	++CvDEPTH(cv);
292	}	422	}
293		423
294	PUTBACK;	424	PUTBACK;
295	}	425	}
296	}	426	}
297		427
298	static void	428	static void
299	save_state(Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
300	{	430	{
301	{	431	{
302	dSP;	432	dSP;
303	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
304	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
307	/*	437	/*
308	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
309	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
310	*/	440	*/
311		441
312	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
313	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
314	for (;;)	444	for (;;)
315	{	445	{
316	while (cxix >= 0)	446	while (cxix >= 0)
317	{	447	{
318	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
319		449
320	if (CxTYPE(cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
321	{	451	{
322	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
		453
323	if (CvDEPTH(cv))	454	if (CvDEPTH (cv))
324	{	455	{
325	EXTEND (SP, CvDEPTH(cv)*2);	456	EXTEND (SP, 3);
326
327	while (--CvDEPTH(cv))
328	{
329	/* this tells the restore code to increment CvDEPTH */
330	PUSHs (Nullsv);
331	PUSHs ((SV *)cv);
332	}
333
334	PUSHs ((SV *)CvPADLIST(cv));	457	PUSHs ((SV *)CvPADLIST (cv));
		458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
335	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
336		460
		461	CvDEPTH (cv) = 0;
337	get_padlist (cv);	462	get_padlist (aTHX_ cv);
338	}	463	}
339	}	464	}
340	#ifdef CXt_FORMAT
341	else if (CxTYPE(cx) == CXt_FORMAT)
342	{
343	/* I never used formats, so how should I know how these are implemented? */
344	/* my bold guess is as a simple, plain sub... */
345	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
346	}
347	#endif
348	}	465	}
349		466
350	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
351	break;	468	break;
352		469
353	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
354	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
355	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
356	}	473	}
357		474
358	PUTBACK;	475	PUTBACK;
359	}	476	}
360		477
361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
364		483
365	#define VAR(name,type)c->name = PL_ ## name;	484	#define VAR(name,type)c->name = PL_ ## name;
366	# include "state.h"	485	# include "state.h"
367	#undef VAR	486	#undef VAR
368	}	487	}
…		…
371	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
372	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
373	* on the (sometimes correct) assumption that coroutines do	492	* on the (sometimes correct) assumption that coroutines do
374	* not usually need a lot of stackspace.	493	* not usually need a lot of stackspace.
375	*/	494	*/
		495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
376	static void	498	static void
377	coro_init_stacks ()	499	coro_init_stacks (pTHX)
378	{	500	{
379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	501	PL_curstackinfo = new_stackinfo(64, 6);
380	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
381	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
383		505
384	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
385	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
386	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
387		509
388	New(50,PL_tmps_stack,96,SV*);	510	New(50,PL_tmps_stack,64,SV*);
389	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
390	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
391	PL_tmps_max = 96;	513	PL_tmps_max = 64;
392		514
393	New(54,PL_markstack,16,I32);	515	New(54,PL_markstack,16,I32);
394	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
395	PL_markstack_max = PL_markstack + 16;	517	PL_markstack_max = PL_markstack + 16;
396		518
…		…
400		522
401	New(54,PL_scopestack,16,I32);	523	New(54,PL_scopestack,16,I32);
402	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
403	PL_scopestack_max = 16;	525	PL_scopestack_max = 16;
404		526
405	New(54,PL_savestack,96,ANY);	527	New(54,PL_savestack,64,ANY);
406	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
407	PL_savestack_max = 96;	529	PL_savestack_max = 64;
408		530
409	#if !PERL_VERSION_ATLEAST (5,9,0)	531	#if !PERL_VERSION_ATLEAST (5,9,0)
410	New(54,PL_retstack,8,OP*);	532	New(54,PL_retstack,4,OP*);
411	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
412	PL_retstack_max = 8;	534	PL_retstack_max = 4;
413	#endif	535	#endif
414	}	536	}
		537	#endif
415		538
416	/*	539	/*
417	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
418	*/	541	*/
419	static void	542	static void
420	coro_destroy_stacks ()	543	coro_destroy_stacks (pTHX)
421	{	544	{
422	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
423	{	546	{
424	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
425	LEAVE_SCOPE (0);	548	LEAVE_SCOPE (0);
		549	assert (PL_tmps_floor == -1);
426		550
427	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
428	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
429		554
		555	/* unwind all extra stacks */
430	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
431	}	560	}
432		561
433	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
434	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
435		564
436	while (PL_curstackinfo)	565	while (PL_curstackinfo)
437	{	566	{
438	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
439		568
440	{ /*D*//*remove*/
441	dSP;
442	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
443	PUTBACK; /* possibly superfluous */
444	}
445
446	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
447	{
448	dounwind (-1);/*D*//*remove*/
449	SvREFCNT_dec (PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
450	}
451		571
452	Safefree (PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
453	Safefree (PL_curstackinfo);	573	Safefree (PL_curstackinfo);
454	PL_curstackinfo = p;	574	PL_curstackinfo = p;
455	}	575	}
…		…
461	#if !PERL_VERSION_ATLEAST (5,9,0)	581	#if !PERL_VERSION_ATLEAST (5,9,0)
462	Safefree (PL_retstack);	582	Safefree (PL_retstack);
463	#endif	583	#endif
464	}	584	}
465		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/** coroutine stack handling ************************************************/
		618
466	static void	619	static void
467	setup_coro (struct coro *coro)	620	setup_coro (pTHX_ struct coro *coro)
468	{	621	{
469	/*	622	/*
470	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
471	*/	624	*/
472
473	coro_init_stacks ();	625	coro_init_stacks (aTHX);
474		626
		627	PL_runops = RUNOPS_DEFAULT;
		628	PL_curcop = &PL_compiling;
		629	PL_in_eval = EVAL_NULL;
475	PL_curcop = 0;	630	PL_comppad = 0;
476	PL_in_eval = 0;
477	PL_curpm = 0;	631	PL_curpm = 0;
		632	PL_localizing = 0;
		633	PL_dirty = 0;
		634	PL_restartop = 0;
478		635
479	{	636	{
480	dSP;	637	dSP;
481	LOGOP myop;	638	LOGOP myop;
482		639
483	/* I have no idea why this is needed, but it is */
484	PUSHMARK (SP);
485
486	SvREFCNT_dec (GvAV (PL_defgv));	640	SvREFCNT_dec (GvAV (PL_defgv));
487	GvAV (PL_defgv) = coro->args; coro->args = 0;	641	GvAV (PL_defgv) = coro->args; coro->args = 0;
488		642
489	Zero (&myop, 1, LOGOP);	643	Zero (&myop, 1, LOGOP);
490	myop.op_next = Nullop;	644	myop.op_next = Nullop;
491	myop.op_flags = OPf_WANT_VOID;	645	myop.op_flags = OPf_WANT_VOID;
492		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
493	PL_op = (OP *)&myop;	650	PL_op = (OP *)&myop;
494
495	PUSHMARK (SP);
496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
497	PUTBACK;
498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
499	SPAGAIN;	652	SPAGAIN;
500
501	ENTER; /* necessary e.g. for dounwind */
502	}	653	}
		654
		655	ENTER; /* necessary e.g. for dounwind */
503	}	656	}
504		657
505	static void	658	static void
506	free_coro_mortal ()	659	free_coro_mortal (pTHX)
507	{	660	{
508	if (coro_mortal)	661	if (coro_mortal)
509	{	662	{
510	SvREFCNT_dec (coro_mortal);	663	SvREFCNT_dec (coro_mortal);
511	coro_mortal = 0;	664	coro_mortal = 0;
512	}	665	}
513	}	666	}
514		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (cctx->flags & CC_TRACE_ALL)
		681	{
		682	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		683	{
		684	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		685	SV **bot, **top;
		686	AV *av = newAV (); /* return values */
		687	SV **cb;
		688	dSP;
		689
		690	GV *gv = CvGV (cx->blk_sub.cv);
		691	SV *fullname = sv_2mortal (newSV (0));
		692	if (isGV (gv))
		693	gv_efullname3 (fullname, gv, 0);
		694
		695	bot = PL_stack_base + cx->blk_oldsp + 1;
		696	top = cx->blk_gimme == G_ARRAY ? SP + 1
		697	: cx->blk_gimme == G_SCALAR ? bot + 1
		698	: bot;
		699
		700	while (bot < top)
		701	av_push (av, SvREFCNT_inc (*bot++));
		702
		703	PL_runops = RUNOPS_DEFAULT;
		704	ENTER;
		705	SAVETMPS;
		706	EXTEND (SP, 3);
		707	PUSHMARK (SP);
		708	PUSHs (&PL_sv_no);
		709	PUSHs (fullname);
		710	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		711	PUTBACK;
		712	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		713	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		714	SPAGAIN;
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = runops_trace;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	runops_proc_t old_runops = PL_runops;
		735	dSP;
		736	GV *gv = CvGV (cx->blk_sub.cv);
		737	SV *fullname = sv_2mortal (newSV (0));
		738
		739	if (isGV (gv))
		740	gv_efullname3 (fullname, gv, 0);
		741
		742	PL_runops = RUNOPS_DEFAULT;
		743	ENTER;
		744	SAVETMPS;
		745	EXTEND (SP, 3);
		746	PUSHMARK (SP);
		747	PUSHs (&PL_sv_yes);
		748	PUSHs (fullname);
		749	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		750	PUTBACK;
		751	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		752	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		753	SPAGAIN;
		754	FREETMPS;
		755	LEAVE;
		756	PL_runops = runops_trace;
		757	}
		758
		759	oldcxix = cxstack_ix;
		760	}
		761
		762	if (cctx->flags & CC_TRACE_LINE)
		763	{
		764	dSP;
		765
		766	PL_runops = RUNOPS_DEFAULT;
		767	ENTER;
		768	SAVETMPS;
		769	EXTEND (SP, 3);
		770	PL_runops = RUNOPS_DEFAULT;
		771	PUSHMARK (SP);
		772	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		773	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		774	PUTBACK;
		775	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		776	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		777	SPAGAIN;
		778	FREETMPS;
		779	LEAVE;
		780	PL_runops = runops_trace;
		781	}
		782	}
		783	}
		784	}
		785	}
		786
		787	TAINT_NOT;
		788	return 0;
		789	}
		790
		791	/* inject a fake call to Coro::State::_cctx_init into the execution */
		792	/* _cctx_init should be careful, as it could be called at almost any time */
		793	/* during execution of a perl program */
515	static void NOINLINE	794	static void NOINLINE
516	prepare_cctx (coro_cctx *cctx)	795	prepare_cctx (pTHX_ coro_cctx *cctx)
517	{	796	{
518	dSP;	797	dSP;
519	LOGOP myop;	798	LOGOP myop;
520		799
		800	PL_top_env = &PL_start_env;
		801
		802	if (cctx->flags & CC_TRACE)
		803	PL_runops = runops_trace;
		804
521	Zero (&myop, 1, LOGOP);	805	Zero (&myop, 1, LOGOP);
522	myop.op_next = PL_op;	806	myop.op_next = PL_op;
523	myop.op_flags = OPf_WANT_VOID;	807	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
524
525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
526		808
527	PUSHMARK (SP);	809	PUSHMARK (SP);
		810	EXTEND (SP, 2);
		811	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	812	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
529	PUTBACK;	813	PUTBACK;
		814	PL_op = (OP *)&myop;
530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	815	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
531	SPAGAIN;	816	SPAGAIN;
532	}	817	}
533		818
		819	/*
		820	* this is a _very_ stripped down perl interpreter ;)
		821	*/
534	static void	822	static void
535	coro_run (void *arg)	823	coro_run (void *arg)
536	{	824	{
		825	dTHX;
		826
537	/* coro_run is the alternative epilogue of transfer() */	827	/* coro_run is the alternative tail of transfer(), so unlock here. */
538	UNLOCK;	828	UNLOCK;
539		829
		830	/* we now skip the entersub that lead to transfer() */
		831	PL_op = PL_op->op_next;
		832
		833	/* inject a fake subroutine call to cctx_init */
		834	prepare_cctx (aTHX_ (coro_cctx *)arg);
		835
		836	/* somebody or something will hit me for both perl_run and PL_restartop */
		837	PL_restartop = PL_op;
		838	perl_run (PL_curinterp);
		839
540	/*	840	/*
541	* this is a _very_ stripped down perl interpreter ;)	841	* If perl-run returns we assume exit() was being called or the coro
		842	* fell off the end, which seems to be the only valid (non-bug)
		843	* reason for perl_run to return. We try to exit by jumping to the
		844	* bootstrap-time "top" top_env, as we cannot restore the "main"
		845	* coroutine as Coro has no such concept
542	*/	846	*/
543	PL_top_env = &PL_start_env;	847	PL_top_env = main_top_env;
544		848	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
545	/* inject call to cctx_init */
546	prepare_cctx ((coro_cctx *)arg);
547
548	/* somebody will hit me for both perl_run and PL_restartop */
549	perl_run (PL_curinterp);
550
551	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
552	abort ();
553	}	849	}
554		850
555	static coro_cctx *	851	static coro_cctx *
556	cctx_new ()	852	cctx_new ()
557	{	853	{
558	coro_cctx *cctx;	854	coro_cctx *cctx;
		855	void *stack_start;
		856	size_t stack_size;
559		857
560	++cctx_count;	858	++cctx_count;
561		859
562	New (0, cctx, 1, coro_cctx);	860	Newz (0, cctx, 1, coro_cctx);
563		861
564	#if HAVE_MMAP	862	#if HAVE_MMAP
565		863
566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	864	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
567	/* mmap suppsedly does allocate-on-write for us */	865	/* mmap supposedly does allocate-on-write for us */
568	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	866	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
569		867
570	if (cctx->sptr == (void *)-1)	868	if (cctx->sptr != (void *)-1)
571	{
572	perror ("FATAL: unable to mmap stack for coroutine");
573	_exit (EXIT_FAILURE);
574	}	869	{
575
576	# if STACKGUARD	870	# if CORO_STACKGUARD
577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	871	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
578	# endif	872	# endif
		873	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		874	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		875	cctx->flags |= CC_MAPPED;
		876	}
		877	else
		878	#endif
		879	{
		880	cctx->ssize = coro_stacksize * (long)sizeof (long);
		881	New (0, cctx->sptr, coro_stacksize, long);
579		882
580	#else
581
582	cctx->ssize = STACKSIZE * (long)sizeof (long);
583	New (0, cctx->sptr, STACKSIZE, long);
584
585	if (!cctx->sptr)	883	if (!cctx->sptr)
586	{	884	{
587	perror ("FATAL: unable to malloc stack for coroutine");	885	perror ("FATAL: unable to allocate stack for coroutine");
588	_exit (EXIT_FAILURE);	886	_exit (EXIT_FAILURE);
589	}	887	}
590		888
591	#endif	889	stack_start = cctx->sptr;
		890	stack_size = cctx->ssize;
		891	}
592		892
593	#if USE_VALGRIND	893	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
594	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
595	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
596	cctx->ssize + (char *)cctx->sptr
597	);
598	#endif
599
600	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	894	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
601		895
602	return cctx;	896	return cctx;
603	}	897	}
604		898
605	static void	899	static void
606	cctx_free (coro_cctx *cctx)	900	cctx_destroy (coro_cctx *cctx)
607	{	901	{
608	if (!cctx)	902	if (!cctx)
609	return;	903	return;
610		904
611	--cctx_count;	905	--cctx_count;
612		906
613	#if USE_VALGRIND	907	#if CORO_USE_VALGRIND
614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	908	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
615	#endif	909	#endif
616		910
617	#if HAVE_MMAP	911	#if HAVE_MMAP
		912	if (cctx->flags & CC_MAPPED)
618	munmap (cctx->sptr, cctx->ssize);	913	munmap (cctx->sptr, cctx->ssize);
619	#else	914	else
		915	#endif
620	Safefree (cctx->sptr);	916	Safefree (cctx->sptr);
621	#endif
622		917
623	Safefree (cctx);	918	Safefree (cctx);
624	}	919	}
625		920
626	static coro_cctx *	921	static coro_cctx *
627	cctx_get ()	922	cctx_get (pTHX)
628	{	923	{
629	coro_cctx *cctx;
630
631	if (cctx_first)	924	while (cctx_first)
632	{	925	{
		926	coro_cctx *cctx = cctx_first;
		927	cctx_first = cctx->next;
633	--cctx_idle;	928	--cctx_idle;
634	cctx = cctx_first;	929
635	cctx_first = cctx->next;	930	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
636	}	931	return cctx;
637	else	932
638	{	933	cctx_destroy (cctx);
639	cctx = cctx_new ();
640	PL_op = PL_op->op_next;
641	}	934	}
642		935
643	return cctx;	936	return cctx_new ();
644	}	937	}
645		938
646	static void	939	static void
647	cctx_put (coro_cctx *cctx)	940	cctx_put (coro_cctx *cctx)
648	{	941	{
		942	/* free another cctx if overlimit */
		943	if (cctx_idle >= MAX_IDLE_CCTX)
		944	{
		945	coro_cctx *first = cctx_first;
		946	cctx_first = first->next;
		947	--cctx_idle;
		948
		949	cctx_destroy (first);
		950	}
		951
649	++cctx_idle;	952	++cctx_idle;
650	cctx->next = cctx_first;	953	cctx->next = cctx_first;
651	cctx_first = cctx;	954	cctx_first = cctx;
652	}	955	}
653		956
654	/* never call directly, always through the coro_state_transfer global variable */	957	/** coroutine switching *****************************************************/
		958
655	static void NOINLINE	959	static void NOINLINE
		960	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		961	{
		962	if (prev != next)
		963	{
		964	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		965	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		966
		967	if (next->flags & CF_RUNNING)
		968	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		969
		970	if (next->flags & CF_DESTROYED)
		971	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		972
		973	if (PL_lex_state != LEX_NOTPARSING)
		974	croak ("Coro::State::transfer called while parsing, but this is not supported");
		975	}
		976	}
		977
		978	/* always use the TRANSFER macro */
		979	static void NOINLINE
656	transfer (struct coro *prev, struct coro *next, int flags)	980	transfer (pTHX_ struct coro *prev, struct coro *next)
657	{	981	{
658	dSTACKLEVEL;	982	dSTACKLEVEL;
659		983
660	/* sometimes transfer is only called to set idle_sp */	984	/* sometimes transfer is only called to set idle_sp */
661	if (flags == TRANSFER_SET_STACKLEVEL)	985	if (!next)
		986	{
662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	987	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		988	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		989	}
663	else if (prev != next)	990	else if (prev != next)
664	{	991	{
665	coro_cctx *prev__cctx;	992	coro_cctx *prev__cctx;
666		993
		994	if (prev->flags & CF_NEW)
		995	{
		996	/* create a new empty context */
		997	Newz (0, prev->cctx, 1, coro_cctx);
		998	prev->flags &= ~CF_NEW;
		999	prev->flags |= CF_RUNNING;
		1000	}
		1001
		1002	prev->flags &= ~CF_RUNNING;
		1003	next->flags |= CF_RUNNING;
		1004
667	LOCK;	1005	LOCK;
668		1006
669	if (next->mainstack)	1007	if (next->flags & CF_NEW)
670	{	1008	{
671	/* coroutine already started */	1009	/* need to start coroutine */
672	SAVE (prev, flags);	1010	next->flags &= ~CF_NEW;
673	LOAD (next);	1011	/* first get rid of the old state */
		1012	save_perl (aTHX_ prev);
		1013	/* setup coroutine call */
		1014	setup_coro (aTHX_ next);
674	}	1015	}
675	else	1016	else
676	{	1017	{
677	/* need to start coroutine */	1018	/* coroutine already started */
678	/* first get rid of the old state */	1019	save_perl (aTHX_ prev);
679	SAVE (prev, -1);	1020	load_perl (aTHX_ next);
680	/* setup coroutine call */
681	setup_coro (next);
682	/* need a stack */
683	next->cctx = 0;
684	}	1021	}
685		1022
686	if (!prev->cctx)
687	/* create a new empty context */
688	Newz (0, prev->cctx, 1, coro_cctx);
689
690	prev__cctx = prev->cctx;	1023	prev__cctx = prev->cctx;
691		1024
692	/* possibly "free" the cctx */	1025	/* possibly "free" the cctx */
693	if (prev__cctx->idle_sp == STACKLEVEL)	1026	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
694	{	1027	{
		1028	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1029	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1030
		1031	prev->cctx = 0;
		1032
695	cctx_put (prev__cctx);	1033	cctx_put (prev__cctx);
696	prev->cctx = 0;
697	}	1034	}
698		1035
		1036	++next->usecount;
		1037
699	if (!next->cctx)	1038	if (!next->cctx)
700	next->cctx = cctx_get ();	1039	next->cctx = cctx_get (aTHX);
701		1040
702	if (prev__cctx != next->cctx)	1041	if (prev__cctx != next->cctx)
703	{	1042	{
704	prev__cctx->top_env = PL_top_env;	1043	prev__cctx->top_env = PL_top_env;
705	PL_top_env = next->cctx->top_env;	1044	PL_top_env = next->cctx->top_env;
706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1045	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
707	}	1046	}
708		1047
709	free_coro_mortal ();	1048	free_coro_mortal (aTHX);
710
711	UNLOCK;	1049	UNLOCK;
712	}	1050	}
713	}	1051	}
714		1052
715	struct transfer_args	1053	struct transfer_args
716	{	1054	{
717	struct coro *prev, *next;	1055	struct coro *prev, *next;
718	int flags;
719	};	1056	};
720		1057
721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1058	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1059	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
722		1060
		1061	/** high level stuff ********************************************************/
		1062
723	static void	1063	static int
724	coro_state_destroy (struct coro *coro)	1064	coro_state_destroy (pTHX_ struct coro *coro)
725	{	1065	{
726	if (coro->refcnt--)	1066	if (coro->flags & CF_DESTROYED)
727	return;	1067	return 0;
		1068
		1069	coro->flags |= CF_DESTROYED;
		1070
		1071	if (coro->flags & CF_READY)
		1072	{
		1073	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1074	/* alternative: look through all ready queues and remove the coro */
		1075	LOCK;
		1076	--coro_nready;
		1077	UNLOCK;
		1078	}
		1079	else
		1080	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
728		1081
729	if (coro->mainstack && coro->mainstack != main_mainstack)	1082	if (coro->mainstack && coro->mainstack != main_mainstack)
730	{	1083	{
731	struct coro temp;	1084	struct coro temp;
732		1085
733	SAVE ((&temp), TRANSFER_SAVE_ALL);	1086	assert (!(coro->flags & CF_RUNNING));
734	LOAD (coro);
735		1087
		1088	Zero (&temp, 1, struct coro);
		1089	temp.save = CORO_SAVE_ALL;
		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
		1096
736	coro_destroy_stacks ();	1097	coro_destroy_stacks (aTHX);
737		1098
738	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
739		1100
740	coro->mainstack = 0;	1101	coro->mainstack = 0;
741	}	1102	}
742		1103
743	cctx_free (coro->cctx);	1104	cctx_destroy (coro->cctx);
744	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
745	Safefree (coro);	1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
746	}	1112	}
747		1113
748	static int	1114	static int
749	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
750	{	1116	{
751	struct coro *coro = (struct coro *)mg->mg_ptr;	1117	struct coro *coro = (struct coro *)mg->mg_ptr;
752	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
753		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
754	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
755		1127
756	return 0;	1128	return 0;
757	}	1129	}
758		1130
759	static int	1131	static int
…		…
766	return 0;	1138	return 0;
767	}	1139	}
768		1140
769	static MGVTBL coro_state_vtbl = {	1141	static MGVTBL coro_state_vtbl = {
770	0, 0, 0, 0,	1142	0, 0, 0, 0,
771	coro_state_clear,	1143	coro_state_free,
772	0,	1144	0,
773	#ifdef MGf_DUP	1145	#ifdef MGf_DUP
774	coro_state_dup,	1146	coro_state_dup,
775	#else	1147	#else
776	# define MGf_DUP 0	1148	# define MGf_DUP 0
777	#endif	1149	#endif
778	};	1150	};
779		1151
780	static struct coro *
781	SvSTATE (SV *coro)
782	{
783	HV *stash;
784	MAGIC *mg;
785
786	if (SvROK (coro))
787	coro = SvRV (coro);
788
789	stash = SvSTASH (coro);
790	if (stash != coro_stash && stash != coro_state_stash)
791	{
792	/* very slow, but rare, check */
793	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
794	croak ("Coro::State object required");
795	}
796
797	mg = SvMAGIC (coro);
798	assert (mg->mg_type == PERL_MAGIC_ext);
799	return (struct coro *)mg->mg_ptr;
800	}
801
802	static void	1152	static void
803	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1153	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
804	{	1154	{
805	ta->prev = SvSTATE (prev);	1155	ta->prev = SvSTATE (prev_sv);
806	ta->next = SvSTATE (next);	1156	ta->next = SvSTATE (next_sv);
807	ta->flags = flags;	1157	TRANSFER_CHECK (*ta);
808	}	1158	}
809		1159
810	static void	1160	static void
811	api_transfer (SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
812	{	1162	{
813	dTHX;	1163	dTHX;
814	struct transfer_args ta;	1164	struct transfer_args ta;
815		1165
816	prepare_transfer (&ta, prev, next, flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
817	TRANSFER (ta);	1167	TRANSFER (ta);
818	}	1168	}
819		1169
		1170	static int
		1171	api_save (SV *coro_sv, int new_save)
		1172	{
		1173	dTHX;
		1174	struct coro *coro = SvSTATE (coro_sv);
		1175	int old_save = coro->save;
		1176
		1177	if (new_save >= 0)
		1178	coro->save = new_save;
		1179
		1180	return old_save;
		1181	}
		1182
820	/** Coro ********************************************************************/	1183	/** Coro ********************************************************************/
821		1184
822	#define PRIO_MAX 3
823	#define PRIO_HIGH 1
824	#define PRIO_NORMAL 0
825	#define PRIO_LOW -1
826	#define PRIO_IDLE -3
827	#define PRIO_MIN -4
828
829	/* for Coro.pm */
830	static GV *coro_current, *coro_idle;
831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832	static int coro_nready;
833
834	static void	1185	static void
835	coro_enq (SV *sv)	1186	coro_enq (pTHX_ SV *coro_sv)
836	{	1187	{
837	int prio;
838
839	if (SvTYPE (sv) != SVt_PVHV)
840	croak ("Coro::ready tried to enqueue something that is not a coroutine");
841
842	prio = SvSTATE (sv)->prio;
843
844	av_push (coro_ready [prio - PRIO_MIN], sv);	1188	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
845	coro_nready++;
846	}	1189	}
847		1190
848	static SV *	1191	static SV *
849	coro_deq (int min_prio)	1192	coro_deq (pTHX_ int min_prio)
850	{	1193	{
851	int prio = PRIO_MAX - PRIO_MIN;	1194	int prio = PRIO_MAX - PRIO_MIN;
852		1195
853	min_prio -= PRIO_MIN;	1196	min_prio -= PRIO_MIN;
854	if (min_prio < 0)	1197	if (min_prio < 0)
855	min_prio = 0;	1198	min_prio = 0;
856		1199
857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1200	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
858	if (AvFILLp (coro_ready [prio]) >= 0)	1201	if (AvFILLp (coro_ready [prio]) >= 0)
859	{
860	coro_nready--;
861	return av_shift (coro_ready [prio]);	1202	return av_shift (coro_ready [prio]);
862	}
863		1203
864	return 0;	1204	return 0;
865	}	1205	}
866		1206
		1207	static int
		1208	api_ready (SV *coro_sv)
		1209	{
		1210	dTHX;
		1211	struct coro *coro;
		1212
		1213	if (SvROK (coro_sv))
		1214	coro_sv = SvRV (coro_sv);
		1215
		1216	coro = SvSTATE (coro_sv);
		1217
		1218	if (coro->flags & CF_READY)
		1219	return 0;
		1220
		1221	coro->flags |= CF_READY;
		1222
		1223	LOCK;
		1224	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1225	++coro_nready;
		1226	UNLOCK;
		1227
		1228	return 1;
		1229	}
		1230
		1231	static int
		1232	api_is_ready (SV *coro_sv)
		1233	{
		1234	dTHX;
		1235	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1236	}
		1237
867	static void	1238	static void
868	api_ready (SV *coro)	1239	prepare_schedule (pTHX_ struct transfer_args *ta)
869	{	1240	{
870	dTHX;	1241	SV *prev_sv, *next_sv;
871		1242
872	if (SvROK (coro))	1243	for (;;)
873	coro = SvRV (coro);	1244	{
		1245	LOCK;
		1246	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1247
		1248	/* nothing to schedule: call the idle handler */
		1249	if (!next_sv)
		1250	{
		1251	dSP;
		1252	UNLOCK;
		1253
		1254	ENTER;
		1255	SAVETMPS;
		1256
		1257	PUSHMARK (SP);
		1258	PUTBACK;
		1259	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1260
		1261	FREETMPS;
		1262	LEAVE;
		1263	continue;
		1264	}
		1265
		1266	ta->next = SvSTATE (next_sv);
		1267
		1268	/* cannot transfer to destroyed coros, skip and look for next */
		1269	if (ta->next->flags & CF_DESTROYED)
		1270	{
		1271	UNLOCK;
		1272	SvREFCNT_dec (next_sv);
		1273	/* coro_nready is already taken care of by destroy */
		1274	continue;
		1275	}
		1276
		1277	--coro_nready;
		1278	UNLOCK;
		1279	break;
		1280	}
		1281
		1282	/* free this only after the transfer */
		1283	prev_sv = SvRV (coro_current);
		1284	ta->prev = SvSTATE (prev_sv);
		1285	TRANSFER_CHECK (*ta);
		1286	assert (ta->next->flags & CF_READY);
		1287	ta->next->flags &= ~CF_READY;
		1288	SvRV_set (coro_current, next_sv);
874		1289
875	LOCK;	1290	LOCK;
876	coro_enq (SvREFCNT_inc (coro));	1291	free_coro_mortal (aTHX);
		1292	coro_mortal = prev_sv;
877	UNLOCK;	1293	UNLOCK;
878	}	1294	}
879		1295
880	static void	1296	static void
881	prepare_schedule (struct transfer_args *ta)
882	{
883	SV *current, *prev, *next;
884
885	current = GvSV (coro_current);
886
887	for (;;)
888	{
889	LOCK;
890	next = coro_deq (PRIO_MIN);
891	UNLOCK;
892
893	if (next)
894	break;
895
896	{
897	dSP;
898
899	ENTER;
900	SAVETMPS;
901
902	PUSHMARK (SP);
903	PUTBACK;
904	call_sv (GvSV (coro_idle), G_DISCARD);
905
906	FREETMPS;
907	LEAVE;
908	}
909	}
910
911	prev = SvRV (current);
912	SvRV (current) = next;
913
914	/* free this only after the transfer */
915	LOCK;
916	free_coro_mortal ();
917	UNLOCK;
918	coro_mortal = prev;
919
920	ta->prev = SvSTATE (prev);
921	ta->next = SvSTATE (next);
922	ta->flags = TRANSFER_SAVE_ALL;
923	}
924
925	static void
926	prepare_cede (struct transfer_args *ta)	1297	prepare_cede (pTHX_ struct transfer_args *ta)
927	{	1298	{
928	LOCK;	1299	api_ready (coro_current);
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930	UNLOCK;
931
932	prepare_schedule (ta);	1300	prepare_schedule (aTHX_ ta);
		1301	}
		1302
		1303	static int
		1304	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1305	{
		1306	if (coro_nready)
		1307	{
		1308	SV *prev = SvRV (coro_current);
		1309	prepare_schedule (aTHX_ ta);
		1310	api_ready (prev);
		1311	return 1;
		1312	}
		1313	else
		1314	return 0;
933	}	1315	}
934		1316
935	static void	1317	static void
936	api_schedule (void)	1318	api_schedule (void)
937	{	1319	{
938	dTHX;	1320	dTHX;
939	struct transfer_args ta;	1321	struct transfer_args ta;
940		1322
941	prepare_schedule (&ta);	1323	prepare_schedule (aTHX_ &ta);
942	TRANSFER (ta);	1324	TRANSFER (ta);
943	}	1325	}
944		1326
945	static void	1327	static int
946	api_cede (void)	1328	api_cede (void)
947	{	1329	{
948	dTHX;	1330	dTHX;
949	struct transfer_args ta;	1331	struct transfer_args ta;
950		1332
951	prepare_cede (&ta);	1333	prepare_cede (aTHX_ &ta);
		1334
		1335	if (ta.prev != ta.next)
		1336	{
952	TRANSFER (ta);	1337	TRANSFER (ta);
		1338	return 1;
		1339	}
		1340	else
		1341	return 0;
953	}	1342	}
954		1343
		1344	static int
		1345	api_cede_notself (void)
		1346	{
		1347	dTHX;
		1348	struct transfer_args ta;
		1349
		1350	if (prepare_cede_notself (aTHX_ &ta))
		1351	{
		1352	TRANSFER (ta);
		1353	return 1;
		1354	}
		1355	else
		1356	return 0;
		1357	}
		1358
		1359	static void
		1360	api_trace (SV *coro_sv, int flags)
		1361	{
		1362	dTHX;
		1363	struct coro *coro = SvSTATE (coro_sv);
		1364
		1365	if (flags & CC_TRACE)
		1366	{
		1367	if (!coro->cctx)
		1368	coro->cctx = cctx_new ();
		1369	else if (!(coro->cctx->flags & CC_TRACE))
		1370	croak ("cannot enable tracing on coroutine with custom stack");
		1371
		1372	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1373	}
		1374	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1375	{
		1376	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1377
		1378	if (coro->flags & CF_RUNNING)
		1379	PL_runops = RUNOPS_DEFAULT;
		1380	else
		1381	coro->runops = RUNOPS_DEFAULT;
		1382	}
		1383	}
		1384
955	MODULE = Coro::State PACKAGE = Coro::State	1385	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956		1386
957	PROTOTYPES: DISABLE	1387	PROTOTYPES: DISABLE
958		1388
959	BOOT:	1389	BOOT:
960	{	1390	{
…		…
963	#endif	1393	#endif
964	BOOT_PAGESIZE;	1394	BOOT_PAGESIZE;
965		1395
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1396	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1397
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1400	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1401	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1402
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1403	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1404	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1405	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1406	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1407	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1408	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1409	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
971		1410
972	main_mainstack = PL_mainstack;	1411	main_mainstack = PL_mainstack;
		1412	main_top_env = PL_top_env;
		1413
		1414	while (main_top_env->je_prev)
		1415	main_top_env = main_top_env->je_prev;
973		1416
974	coroapi.ver = CORO_API_VERSION;	1417	coroapi.ver = CORO_API_VERSION;
975	coroapi.transfer = api_transfer;	1418	coroapi.transfer = api_transfer;
976		1419
977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1420	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
985	HV *hv;	1428	HV *hv;
986	int i;	1429	int i;
987		1430
988	Newz (0, coro, 1, struct coro);	1431	Newz (0, coro, 1, struct coro);
989	coro->args = newAV ();	1432	coro->args = newAV ();
		1433	coro->save = CORO_SAVE_DEF;
		1434	coro->flags = CF_NEW;
990		1435
		1436	if (coro_first) coro_first->prev = coro;
		1437	coro->next = coro_first;
		1438	coro_first = coro;
		1439
991	hv = newHV ();	1440	coro->hv = hv = newHV ();
992	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1441	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1442	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994		1443
995	for (i = 1; i < items; i++)	1444	for (i = 1; i < items; i++)
996	av_push (coro->args, newSVsv (ST (i)));	1445	av_push (coro->args, newSVsv (ST (i)));
997	}	1446	}
998	OUTPUT:	1447	OUTPUT:
		1448	RETVAL
		1449
		1450	int
		1451	save (SV *coro, int new_save = -1)
		1452	CODE:
		1453	RETVAL = api_save (coro, new_save);
		1454	OUTPUT:
		1455	RETVAL
		1456
		1457	int
		1458	save_also (SV *coro_sv, int save_also)
		1459	CODE:
		1460	{
		1461	struct coro *coro = SvSTATE (coro_sv);
		1462	RETVAL = coro->save;
		1463	coro->save |= save_also;
		1464	}
		1465	OUTPUT:
999	RETVAL	1466	RETVAL
1000		1467
1001	void	1468	void
1002	_set_stacklevel (...)	1469	_set_stacklevel (...)
1003	ALIAS:	1470	ALIAS:
1004	Coro::State::transfer = 1	1471	Coro::State::transfer = 1
1005	Coro::schedule = 2	1472	Coro::schedule = 2
1006	Coro::cede = 3	1473	Coro::cede = 3
1007	Coro::Cont::yield = 4	1474	Coro::cede_notself = 4
1008	CODE:	1475	CODE:
1009	{	1476	{
1010	struct transfer_args ta;	1477	struct transfer_args ta;
1011		1478
1012	switch (ix)	1479	switch (ix)
1013	{	1480	{
1014	case 0:	1481	case 0:
1015	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1482	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1016	ta.next = 0;	1483	ta.next = 0;
1017	ta.flags = TRANSFER_SET_STACKLEVEL;
1018	break;	1484	break;
1019		1485
1020	case 1:	1486	case 1:
1021	if (items != 3)	1487	if (items != 2)
1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1488	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1023		1489
1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1490	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1025	break;	1491	break;
1026		1492
1027	case 2:	1493	case 2:
1028	prepare_schedule (&ta);	1494	prepare_schedule (aTHX_ &ta);
1029	break;	1495	break;
1030		1496
1031	case 3:	1497	case 3:
1032	prepare_cede (&ta);	1498	prepare_cede (aTHX_ &ta);
1033	break;	1499	break;
1034		1500
1035	case 4:	1501	case 4:
1036	{	1502	if (!prepare_cede_notself (aTHX_ &ta))
1037	SV *yieldstack;	1503	XSRETURN_EMPTY;
1038	SV *sv;
1039	AV *defav = GvAV (PL_defgv);
1040		1504
1041	yieldstack = *hv_fetch (
1042	(HV *)SvRV (GvSV (coro_current)),
1043	"yieldstack", sizeof ("yieldstack") - 1,
1044	0
1045	);
1046
1047	/* set up @_ -- ugly */
1048	av_clear (defav);
1049	av_fill (defav, items - 1);
1050	while (items--)
1051	av_store (defav, items, SvREFCNT_inc (ST(items)));
1052
1053	sv = av_pop ((AV *)SvRV (yieldstack));
1054	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1055	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1056	ta.flags = 0;
1057	SvREFCNT_dec (sv);
1058	}
1059	break;	1505	break;
1060
1061	}	1506	}
1062		1507
		1508	BARRIER;
1063	TRANSFER (ta);	1509	TRANSFER (ta);
1064	}
1065		1510
1066	void	1511	if (GIMME_V != G_VOID && ta.next != ta.prev)
1067	_clone_state_from (SV *dst, SV *src)	1512	XSRETURN_YES;
		1513	}
		1514
		1515	bool
		1516	_destroy (SV *coro_sv)
1068	CODE:	1517	CODE:
1069	{	1518	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1070	struct coro *coro_src = SvSTATE (src);	1519	OUTPUT:
1071		1520	RETVAL
1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1073
1074	++coro_src->refcnt;
1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1076	}
1077		1521
1078	void	1522	void
1079	_exit (code)	1523	_exit (code)
1080	int code	1524	int code
1081	PROTOTYPE: $	1525	PROTOTYPE: $
1082	CODE:	1526	CODE:
1083	_exit (code);	1527	_exit (code);
1084		1528
1085	int	1529	int
		1530	cctx_stacksize (int new_stacksize = 0)
		1531	CODE:
		1532	RETVAL = coro_stacksize;
		1533	if (new_stacksize)
		1534	coro_stacksize = new_stacksize;
		1535	OUTPUT:
		1536	RETVAL
		1537
		1538	int
1086	cctx_count ()	1539	cctx_count ()
1087	CODE:	1540	CODE:
1088	RETVAL = cctx_count;	1541	RETVAL = cctx_count;
1089	OUTPUT:	1542	OUTPUT:
1090	RETVAL	1543	RETVAL
…		…
1094	CODE:	1547	CODE:
1095	RETVAL = cctx_idle;	1548	RETVAL = cctx_idle;
1096	OUTPUT:	1549	OUTPUT:
1097	RETVAL	1550	RETVAL
1098		1551
		1552	void
		1553	list ()
		1554	PPCODE:
		1555	{
		1556	struct coro *coro;
		1557	for (coro = coro_first; coro; coro = coro->next)
		1558	if (coro->hv)
		1559	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1560	}
		1561
		1562	void
		1563	call (Coro::State coro, SV *coderef)
		1564	ALIAS:
		1565	eval = 1
		1566	CODE:
		1567	{
		1568	if (coro->mainstack)
		1569	{
		1570	struct coro temp;
		1571	Zero (&temp, 1, struct coro);
		1572	temp.save = CORO_SAVE_ALL;
		1573
		1574	if (!(coro->flags & CF_RUNNING))
		1575	{
		1576	save_perl (aTHX_ &temp);
		1577	load_perl (aTHX_ coro);
		1578	}
		1579
		1580	{
		1581	dSP;
		1582	ENTER;
		1583	SAVETMPS;
		1584	PUSHMARK (SP);
		1585	PUTBACK;
		1586	if (ix)
		1587	eval_sv (coderef, 0);
		1588	else
		1589	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1590	SPAGAIN;
		1591	FREETMPS;
		1592	LEAVE;
		1593	PUTBACK;
		1594	}
		1595
		1596	if (!(coro->flags & CF_RUNNING))
		1597	{
		1598	save_perl (aTHX_ coro);
		1599	load_perl (aTHX_ &temp);
		1600	}
		1601	}
		1602	}
		1603
		1604	SV *
		1605	is_ready (Coro::State coro)
		1606	PROTOTYPE: $
		1607	ALIAS:
		1608	is_ready = CF_READY
		1609	is_running = CF_RUNNING
		1610	is_new = CF_NEW
		1611	is_destroyed = CF_DESTROYED
		1612	CODE:
		1613	RETVAL = boolSV (coro->flags & ix);
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	void
		1618	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1619
		1620	SV *
		1621	has_stack (Coro::State coro)
		1622	PROTOTYPE: $
		1623	CODE:
		1624	RETVAL = boolSV (!!coro->cctx);
		1625	OUTPUT:
		1626	RETVAL
		1627
		1628	int
		1629	is_traced (Coro::State coro)
		1630	PROTOTYPE: $
		1631	CODE:
		1632	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1633	OUTPUT:
		1634	RETVAL
		1635
		1636	IV
		1637	rss (Coro::State coro)
		1638	PROTOTYPE: $
		1639	ALIAS:
		1640	usecount = 1
		1641	CODE:
		1642	switch (ix)
		1643	{
		1644	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1645	case 1: RETVAL = coro->usecount; break;
		1646	}
		1647	OUTPUT:
		1648	RETVAL
		1649
		1650
1099	MODULE = Coro::State PACKAGE = Coro	1651	MODULE = Coro::State PACKAGE = Coro
1100		1652
1101	BOOT:	1653	BOOT:
1102	{	1654	{
1103	int i;	1655	int i;
		1656
		1657	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1658	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1659	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1660
		1661	coro_current = get_sv ("Coro::current", FALSE);
		1662	SvREADONLY_on (coro_current);
1104		1663
1105	coro_stash = gv_stashpv ("Coro", TRUE);	1664	coro_stash = gv_stashpv ("Coro", TRUE);
1106		1665
1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1666	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1667	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1668	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1669	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1670	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1671	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1113		1672
1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1116
1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1673	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1118	coro_ready[i] = newAV ();	1674	coro_ready[i] = newAV ();
1119		1675
1120	{	1676	{
1121	SV *sv = perl_get_sv("Coro::API", 1);	1677	SV *sv = perl_get_sv("Coro::API", 1);
1122		1678
1123	coroapi.schedule = api_schedule;	1679	coroapi.schedule = api_schedule;
		1680	coroapi.save = api_save;
1124	coroapi.cede = api_cede;	1681	coroapi.cede = api_cede;
		1682	coroapi.cede_notself = api_cede_notself;
1125	coroapi.ready = api_ready;	1683	coroapi.ready = api_ready;
		1684	coroapi.is_ready = api_is_ready;
1126	coroapi.nready = &coro_nready;	1685	coroapi.nready = &coro_nready;
1127	coroapi.current = coro_current;	1686	coroapi.current = coro_current;
1128		1687
1129	GCoroAPI = &coroapi;	1688	GCoroAPI = &coroapi;
1130	sv_setiv (sv, (IV)&coroapi);	1689	sv_setiv (sv, (IV)&coroapi);
1131	SvREADONLY_on (sv);	1690	SvREADONLY_on (sv);
1132	}	1691	}
1133	}	1692	}
		1693
		1694	void
		1695	_set_current (SV *current)
		1696	PROTOTYPE: $
		1697	CODE:
		1698	SvREFCNT_dec (SvRV (coro_current));
		1699	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1134		1700
1135	int	1701	int
1136	prio (Coro::State coro, int newprio = 0)	1702	prio (Coro::State coro, int newprio = 0)
1137	ALIAS:	1703	ALIAS:
1138	nice = 1	1704	nice = 1
…		…
1141	RETVAL = coro->prio;	1707	RETVAL = coro->prio;
1142		1708
1143	if (items > 1)	1709	if (items > 1)
1144	{	1710	{
1145	if (ix)	1711	if (ix)
1146	newprio += coro->prio;	1712	newprio = coro->prio - newprio;
1147		1713
1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1714	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1715	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1150		1716
1151	coro->prio = newprio;	1717	coro->prio = newprio;
1152	}	1718	}
1153	}	1719	}
		1720	OUTPUT:
		1721	RETVAL
1154		1722
1155	void	1723	SV *
1156	ready (SV *self)	1724	ready (SV *self)
1157	PROTOTYPE: $	1725	PROTOTYPE: $
1158	CODE:	1726	CODE:
1159	api_ready (self);	1727	RETVAL = boolSV (api_ready (self));
		1728	OUTPUT:
		1729	RETVAL
1160		1730
1161	int	1731	int
1162	nready (...)	1732	nready (...)
1163	PROTOTYPE:	1733	PROTOTYPE:
1164	CODE:	1734	CODE:
1165	RETVAL = coro_nready;	1735	RETVAL = coro_nready;
1166	OUTPUT:	1736	OUTPUT:
1167	RETVAL	1737	RETVAL
1168		1738
		1739	# for async_pool speedup
		1740	void
		1741	_pool_1 (SV *cb)
		1742	CODE:
		1743	{
		1744	int i, len;
		1745	HV *hv = (HV *)SvRV (coro_current);
		1746	AV *defav = GvAV (PL_defgv);
		1747	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1748	AV *invoke_av;
		1749
		1750	if (!invoke)
		1751	croak ("\3terminate\2\n");
		1752
		1753	hv_store (hv, "desc", sizeof ("desc") - 1,
		1754	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1755
		1756	invoke_av = (AV *)SvRV (invoke);
		1757	len = av_len (invoke_av);
		1758
		1759	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1760
		1761	if (len > 0)
		1762	{
		1763	av_fill (defav, len - 1);
		1764	for (i = 0; i < len; ++i)
		1765	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1766	}
		1767
		1768	SvREFCNT_dec (invoke);
		1769	}
		1770
		1771	void
		1772	_pool_2 (SV *cb)
		1773	CODE:
		1774	{
		1775	struct coro *coro = SvSTATE (coro_current);
		1776
		1777	sv_setsv (cb, &PL_sv_undef);
		1778
		1779	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1780	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1781	croak ("\3terminate\2\n");
		1782
		1783	av_clear (GvAV (PL_defgv));
		1784	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1785	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1786
		1787	coro->save = CORO_SAVE_DEF;
		1788	coro->prio = 0;
		1789
		1790	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1791	api_trace (coro_current, 0);
		1792
		1793	av_push (av_async_pool, newSVsv (coro_current));
		1794	}
		1795
		1796
1169	MODULE = Coro::State PACKAGE = Coro::AIO	1797	MODULE = Coro::State PACKAGE = Coro::AIO
1170		1798
1171	SV *	1799	SV *
1172	_get_state ()	1800	_get_state ()
1173	CODE:	1801	CODE:
1174	{	1802	{
1175	struct {	1803	struct io_state *data;
1176	int errorno;
1177	int laststype;
1178	int laststatval;
1179	Stat_t statcache;
1180	} data;
1181		1804
		1805	RETVAL = newSV (sizeof (struct io_state));
		1806	data = (struct io_state *)SvPVX (RETVAL);
		1807	SvCUR_set (RETVAL, sizeof (struct io_state));
		1808	SvPOK_only (RETVAL);
		1809
1182	data.errorno = errno;	1810	data->errorno = errno;
1183	data.laststype = PL_laststype;	1811	data->laststype = PL_laststype;
1184	data.laststatval = PL_laststatval;	1812	data->laststatval = PL_laststatval;
1185	data.statcache = PL_statcache;	1813	data->statcache = PL_statcache;
1186
1187	RETVAL = newSVpvn ((char *)&data, sizeof data);
1188	}	1814	}
1189	OUTPUT:	1815	OUTPUT:
1190	RETVAL	1816	RETVAL
1191		1817
1192	void	1818	void
1193	_set_state (char *data_)	1819	_set_state (char *data_)
1194	PROTOTYPE: $	1820	PROTOTYPE: $
1195	CODE:	1821	CODE:
1196	{	1822	{
1197	struct {	1823	struct io_state *data = (void *)data_;
1198	int errorno;
1199	int laststype;
1200	int laststatval;
1201	Stat_t statcache;
1202	} *data = (void *)data_;
1203		1824
1204	errno = data->errorno;	1825	errno = data->errorno;
1205	PL_laststype = data->laststype;	1826	PL_laststype = data->laststype;
1206	PL_laststatval = data->laststatval;	1827	PL_laststatval = data->laststatval;
1207	PL_statcache = data->statcache;	1828	PL_statcache = data->statcache;
1208	}	1829	}
		1830

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