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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.124 by root, Tue Dec 5 12:50:04 2006 UTC vs.
Revision 1.179 by root, Wed Oct 3 16:03:17 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45	#include <assert.h>	13	#include <assert.h>
46
47	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
48	# undef STACKGUARD
49	#endif
50
51	#ifndef STACKGUARD
52	# define STACKGUARD 0
53	#endif
54		14
55	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
56	# include <unistd.h>	16	# include <unistd.h>
57	# include <sys/mman.h>	17	# include <sys/mman.h>
58	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
73	#else	33	#else
74	# define PAGESIZE 0	34	# define PAGESIZE 0
75	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
76	#endif	36	#endif
77		37
78	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
79	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
80	* 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. */
81	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
82	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
83		97
84	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
85		99
86	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
87	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
88	#else	103	#else
89	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
90	#endif	106	#endif
91		107
92	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
93		109
94	#include "CoroAPI.h"	110	#include "CoroAPI.h"
…		…
100	#else	116	#else
101	# define LOCK (void)0	117	# define LOCK (void)0
102	# define UNLOCK (void)0	118	# define UNLOCK (void)0
103	#endif	119	#endif
104		120
		121	/* helper storage struct for Coro::AIO */
105	struct io_state	122	struct io_state
106	{	123	{
107	int errorno;	124	int errorno;
108	I32 laststype;	125	I32 laststype;
109	int laststatval;	126	int laststatval;
110	Stat_t statcache;	127	Stat_t statcache;
111	};	128	};
112		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
113	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
114	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;
115	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
116	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
117		136
		137	static GV *irsgv; /* $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
118	static struct coro_cctx *cctx_first;	144	static struct coro_cctx *cctx_first;
119	static int cctx_count, cctx_idle;	145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		154	};
120		155
121	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
122	typedef struct coro_cctx {	157	typedef struct coro_cctx {
123	struct coro_cctx *next;	158	struct coro_cctx *next;
124		159
125	/* the stack */	160	/* the stack */
126	void *sptr;	161	void *sptr;
127	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
128		163
129	/* cpu state */	164	/* cpu state */
130	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	165	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		166	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
131	JMPENV *top_env;	167	JMPENV *top_env;
132	coro_context cctx;	168	coro_context cctx;
133		169
134	int inuse;
135
136	#if USE_VALGRIND	170	#if CORO_USE_VALGRIND
137	int valgrind_id;	171	int valgrind_id;
138	#endif	172	#endif
		173	unsigned char flags;
139	} coro_cctx;	174	} coro_cctx;
140		175
141	enum {	176	enum {
142	CF_RUNNING = 0x0001, /* coroutine is running */	177	CF_RUNNING = 0x0001, /* coroutine is running */
143	CF_READY = 0x0002, /* coroutine is ready */	178	CF_READY = 0x0002, /* coroutine is ready */
144	CF_NEW = 0x0004, /* ahs never been switched to */	179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
145	};	181	};
146		182
147	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
148	struct coro {	184	struct coro {
149	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
150	coro_cctx *cctx;	186	coro_cctx *cctx;
151		187
152	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
153	AV *args;	189	AV *args;
154	int refcnt;	190	int refcnt;
155	int save; /* CORO_SAVE flags */
156	int flags; /* CF_ flags */	191	int flags; /* CF_ flags */
157		192
158	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
159	AV *defav; /* @_ */	194	AV *defav; /* @_ */
160	SV *defsv; /* $_ */	195	SV *defsv; /* $_ */
161	SV *errsv; /* $@ */	196	SV *errsv; /* $@ */
		197	IO *deffh; /* default filehandle */
162	SV *irssv; /* $/ */	198	SV *irssv; /* $/ */
163	SV *irssv_sv; /* real $/ cache */	199	SV *irssv_sv; /* real $/ cache */
164		200
165	#define VAR(name,type) type name;	201	#define VAR(name,type) type name;
166	# include "state.h"	202	# include "state.h"
167	#undef VAR	203	#undef VAR
168		204
		205	/* statistics */
		206	int usecount; /* number of switches to this coro */
		207
169	/* coro process data */	208	/* coro process data */
170	int prio;	209	int prio;
		210
		211	/* linked list */
		212	struct coro *next, *prev;
		213	HV *hv; /* the perl hash associated with this coro, if any */
171	};	214	};
172		215
173	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
174	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
175		218
		219	/** Coro ********************************************************************/
		220
		221	#define PRIO_MAX 3
		222	#define PRIO_HIGH 1
		223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/** lowlevel stuff **********************************************************/
		235
176	static AV *	236	static AV *
177	coro_clone_padlist (CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
178	{	238	{
179	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
180	AV *newpadlist, *newpad;	240	AV *newpadlist, *newpad;
181		241
182	newpadlist = newAV ();	242	newpadlist = newAV ();
…		…
194		254
195	return newpadlist;	255	return newpadlist;
196	}	256	}
197		257
198	static void	258	static void
199	free_padlist (AV *padlist)	259	free_padlist (pTHX_ AV *padlist)
200	{	260	{
201	/* may be during global destruction */	261	/* may be during global destruction */
202	if (SvREFCNT (padlist))	262	if (SvREFCNT (padlist))
203	{	263	{
204	I32 i = AvFILLp (padlist);	264	I32 i = AvFILLp (padlist);
…		…
225	AV *padlist;	285	AV *padlist;
226	AV *av = (AV *)mg->mg_obj;	286	AV *av = (AV *)mg->mg_obj;
227		287
228	/* casting is fun. */	288	/* casting is fun. */
229	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	289	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
230	free_padlist (padlist);	290	free_padlist (aTHX_ padlist);
231		291
232	SvREFCNT_dec (av);	292	SvREFCNT_dec (av);
233		293
234	return 0;	294	return 0;
235	}	295	}
…		…
243	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
244	? SvMAGIC (cv) \	304	? SvMAGIC (cv) \
245	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
246	: 0	306	: 0
247		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		333
248	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
249	static void	335	static void
250	get_padlist (CV *cv)	336	get_padlist (pTHX_ CV *cv)
251	{	337	{
252	MAGIC *mg = CORO_MAGIC (cv);	338	MAGIC *mg = CORO_MAGIC (cv);
253	AV *av;	339	AV *av;
254		340
255	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
256	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
257	else	343	else
258	{	344	{
259	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
260	/* this is probably cleaner, but also slower? */	346	/* this is probably cleaner, but also slower? */
261	CV *cp = Perl_cv_clone (cv);	347	CV *cp = Perl_cv_clone (cv);
262	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
263	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
264	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
265	#else	351	#else
266	CvPADLIST (cv) = coro_clone_padlist (cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
267	#endif	353	#endif
268	}	354	}
269	}	355	}
270		356
271	static void	357	static void
272	put_padlist (CV *cv)	358	put_padlist (pTHX_ CV *cv)
273	{	359	{
274	MAGIC *mg = CORO_MAGIC (cv);	360	MAGIC *mg = CORO_MAGIC (cv);
275	AV *av;	361	AV *av;
276		362
277	if (!mg)	363	if (!mg)
…		…
288	av_extend (av, AvMAX (av) + 1);	374	av_extend (av, AvMAX (av) + 1);
289		375
290	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
291	}	377	}
292		378
293	#define SB do {	379	/** load & save, init *******************************************************/
294	#define SE } while (0)
295		380
296	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
297
298	static void	381	static void
299	load_perl (Coro__State c)	382	load_perl (pTHX_ Coro__State c)
300	{	383	{
301	#define VAR(name,type) PL_ ## name = c->name;	384	#define VAR(name,type) PL_ ## name = c->name;
302	# include "state.h"	385	# include "state.h"
303	#undef VAR	386	#undef VAR
304		387
305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	388	GvSV (PL_defgv) = c->defsv;
306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	389	GvAV (PL_defgv) = c->defav;
307	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	390	GvSV (PL_errgv) = c->errsv;
308	if (c->irssv)	391	GvIOp(PL_defoutgv) = c->deffh;
309	{	392	PL_rs = c->irssv;
310	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))	393	GvSV (irsgv) = c->irssv_sv;
311	SvREFCNT_dec (c->irssv);
312	else
313	{
314	REPLACE_SV (PL_rs, c->irssv);
315	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
316	sv_setsv (c->irssv_sv, PL_rs);
317	}
318	}
319		394
320	{	395	{
321	dSP;	396	dSP;
322	CV *cv;	397	CV *cv;
323		398
324	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
325	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
326	{	401	{
327	put_padlist (cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
328	CvDEPTH (cv) = PTR2IV (POPs);	403	CvDEPTH (cv) = PTR2IV (POPs);
329	CvPADLIST (cv) = (AV *)POPs;	404	CvPADLIST (cv) = (AV *)POPs;
330	}	405	}
331		406
332	PUTBACK;	407	PUTBACK;
333	}	408	}
334	}	409	}
335		410
336	static void	411	static void
337	save_perl (Coro__State c)	412	save_perl (pTHX_ Coro__State c)
338	{	413	{
339	{	414	{
340	dSP;	415	dSP;
341	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
345	/*	420	/*
346	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
347	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
348	*/	423	*/
349		424
350	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
352	for (;;)	427	for (;;)
353	{	428	{
354	while (cxix >= 0)	429	while (cxix >= 0)
355	{	430	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
357		432
358	if (CxTYPE (cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
359	{	434	{
360	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
361		436
362	if (CvDEPTH (cv))	437	if (CvDEPTH (cv))
363	{	438	{
364	EXTEND (SP, 3);	439	EXTEND (SP, 3);
365
366	PUSHs ((SV *)CvPADLIST (cv));	440	PUSHs ((SV *)CvPADLIST (cv));
367	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
368	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
369		443
370	CvDEPTH (cv) = 0;	444	CvDEPTH (cv) = 0;
371	get_padlist (cv);	445	get_padlist (aTHX_ cv);
372	}	446	}
373	}	447	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE (cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	448	}
383		449
384	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
385	break;	451	break;
386		452
387	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
390	}	456	}
391		457
392	PUTBACK;	458	PUTBACK;
393	}	459	}
394		460
395	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
396	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
397	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
398	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	464	c->deffh = GvIOp (PL_defoutgv);
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
399		467
400	#define VAR(name,type)c->name = PL_ ## name;	468	#define VAR(name,type)c->name = PL_ ## name;
401	# include "state.h"	469	# include "state.h"
402	#undef VAR	470	#undef VAR
403	}	471	}
…		…
406	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
407	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
408	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
409	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
410	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
411	static void	482	static void
412	coro_init_stacks ()	483	coro_init_stacks (pTHX)
413	{	484	{
414	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	485	PL_curstackinfo = new_stackinfo(64, 6);
415	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
416	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
417	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
418		489
419	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
420	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
421	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
422		493
423	New(50,PL_tmps_stack,128,SV*);	494	New(50,PL_tmps_stack,64,SV*);
424	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
425	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
426	PL_tmps_max = 128;	497	PL_tmps_max = 64;
427		498
428	New(54,PL_markstack,32,I32);	499	New(54,PL_markstack,16,I32);
429	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
430	PL_markstack_max = PL_markstack + 32;	501	PL_markstack_max = PL_markstack + 16;
431		502
432	#ifdef SET_MARK_OFFSET	503	#ifdef SET_MARK_OFFSET
433	SET_MARK_OFFSET;	504	SET_MARK_OFFSET;
434	#endif	505	#endif
435		506
436	New(54,PL_scopestack,32,I32);	507	New(54,PL_scopestack,16,I32);
437	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
438	PL_scopestack_max = 32;	509	PL_scopestack_max = 16;
439		510
440	New(54,PL_savestack,64,ANY);	511	New(54,PL_savestack,64,ANY);
441	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
442	PL_savestack_max = 64;	513	PL_savestack_max = 64;
443		514
444	#if !PERL_VERSION_ATLEAST (5,9,0)	515	#if !PERL_VERSION_ATLEAST (5,9,0)
445	New(54,PL_retstack,16,OP*);	516	New(54,PL_retstack,4,OP*);
446	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
447	PL_retstack_max = 16;	518	PL_retstack_max = 4;
448	#endif	519	#endif
449	}	520	}
		521	#endif
450		522
451	/*	523	/*
452	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
453	*/	525	*/
454	static void	526	static void
455	coro_destroy_stacks ()	527	coro_destroy_stacks (pTHX)
456	{	528	{
457	if (!IN_DESTRUCT)
458	{
459	/* is this ugly, I ask? */
460	LEAVE_SCOPE (0);
461
462	/* sure it is, but more important: is it correct?? :/ */
463	FREETMPS;
464
465	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
466	}
467
468	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
469	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
470		531
471	while (PL_curstackinfo)	532	while (PL_curstackinfo)
472	{	533	{
473	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
474		535
475	{ /*D*//*remove*/
476	dSP;
477	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
478	PUTBACK; /* possibly superfluous */
479	}
480
481	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
482	{
483	dounwind (-1);/*D*//*remove*/
484	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
485	}
486		538
487	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
488	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
489	PL_curstackinfo = p;	541	PL_curstackinfo = p;
490	}	542	}
…		…
496	#if !PERL_VERSION_ATLEAST (5,9,0)	548	#if !PERL_VERSION_ATLEAST (5,9,0)
497	Safefree (PL_retstack);	549	Safefree (PL_retstack);
498	#endif	550	#endif
499	}	551	}
500		552
501	static void	553	static size_t
502	setup_coro (struct coro *coro)	554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
		561	{
		562	#define VAR(name,type)coro->name = PL_ ## name;
		563	# include "state.h"
		564	#undef VAR
		565	}
		566
		567	rss += sizeof (coro->curstackinfo);
		568	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
		575
		576	#if !PERL_VERSION_ATLEAST (5,9,0)
		577	rss += coro->retstack_max * sizeof (OP *);
		578	#endif
		579	}
		580
		581	return rss;
		582	}
		583
		584	/** coroutine stack handling ************************************************/
		585
		586	static void
		587	coro_setup (pTHX_ struct coro *coro)
503	{	588	{
504	/*	589	/*
505	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
506	*/	591	*/
507
508	coro_init_stacks ();	592	coro_init_stacks (aTHX);
509		593
		594	PL_runops = RUNOPS_DEFAULT;
510	PL_curcop = &PL_compiling;	595	PL_curcop = &PL_compiling;
511	PL_in_eval = EVAL_NULL;	596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
512	PL_curpm = 0;	598	PL_curpm = 0;
513	PL_localizing = 0;	599	PL_localizing = 0;
514	PL_dirty = 0;	600	PL_dirty = 0;
515	PL_restartop = 0;	601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), irsgv, PERL_MAGIC_sv, "/", 1);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	GvIOp(PL_defoutgv) = io;
		612	IoTYPE (io) = IoTYPE_WRONLY;
		613	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		614	IoFLAGS (io) |= IOf_FLUSH;
		615	}
516		616
517	{	617	{
518	dSP;	618	dSP;
519	LOGOP myop;	619	LOGOP myop;
520		620
521	SvREFCNT_dec (GvAV (PL_defgv));
522	GvAV (PL_defgv) = coro->args; coro->args = 0;
523
524	Zero (&myop, 1, LOGOP);	621	Zero (&myop, 1, LOGOP);
525	myop.op_next = Nullop;	622	myop.op_next = Nullop;
526	myop.op_flags = OPf_WANT_VOID;	623	myop.op_flags = OPf_WANT_VOID;
527		624
528	PUSHMARK (SP);	625	PUSHMARK (SP);
529	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	626	XPUSHs (av_shift (GvAV (PL_defgv)));
530	PUTBACK;	627	PUTBACK;
531	PL_op = (OP *)&myop;	628	PL_op = (OP *)&myop;
532	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	629	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
533	SPAGAIN;	630	SPAGAIN;
534	}	631	}
535		632
536	ENTER; /* necessary e.g. for dounwind */	633	ENTER; /* necessary e.g. for dounwind */
537	}	634	}
538		635
539	static void	636	static void
		637	coro_destroy (pTHX_ struct coro *coro)
		638	{
		639	if (!IN_DESTRUCT)
		640	{
		641	/* restore all saved variables and stuff */
		642	LEAVE_SCOPE (0);
		643	assert (PL_tmps_floor == -1);
		644
		645	/* free all temporaries */
		646	FREETMPS;
		647	assert (PL_tmps_ix == -1);
		648
		649	/* unwind all extra stacks */
		650	POPSTACK_TO (PL_mainstack);
		651
		652	/* unwind main stack */
		653	dounwind (-1);
		654	}
		655
		656	SvREFCNT_dec (GvSV (PL_defgv));
		657	SvREFCNT_dec (GvAV (PL_defgv));
		658	SvREFCNT_dec (GvSV (PL_errgv));
		659	SvREFCNT_dec (GvIOp(PL_defoutgv));
		660	SvREFCNT_dec (PL_rs);
		661	SvREFCNT_dec (GvSV (irsgv));
		662
		663	coro_destroy_stacks (aTHX);
		664	}
		665
		666	static void
540	free_coro_mortal ()	667	free_coro_mortal (pTHX)
541	{	668	{
542	if (coro_mortal)	669	if (coro_mortal)
543	{	670	{
544	SvREFCNT_dec (coro_mortal);	671	SvREFCNT_dec (coro_mortal);
545	coro_mortal = 0;	672	coro_mortal = 0;
546	}	673	}
547	}	674	}
548		675
		676	static int
		677	runops_trace (pTHX)
		678	{
		679	COP *oldcop = 0;
		680	int oldcxix = -2;
		681	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		682	coro_cctx *cctx = coro->cctx;
		683
		684	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		685	{
		686	PERL_ASYNC_CHECK ();
		687
		688	if (cctx->flags & CC_TRACE_ALL)
		689	{
		690	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		691	{
		692	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		693	SV **bot, **top;
		694	AV *av = newAV (); /* return values */
		695	SV **cb;
		696	dSP;
		697
		698	GV *gv = CvGV (cx->blk_sub.cv);
		699	SV *fullname = sv_2mortal (newSV (0));
		700	if (isGV (gv))
		701	gv_efullname3 (fullname, gv, 0);
		702
		703	bot = PL_stack_base + cx->blk_oldsp + 1;
		704	top = cx->blk_gimme == G_ARRAY ? SP + 1
		705	: cx->blk_gimme == G_SCALAR ? bot + 1
		706	: bot;
		707
		708	while (bot < top)
		709	av_push (av, SvREFCNT_inc (*bot++));
		710
		711	PL_runops = RUNOPS_DEFAULT;
		712	ENTER;
		713	SAVETMPS;
		714	EXTEND (SP, 3);
		715	PUSHMARK (SP);
		716	PUSHs (&PL_sv_no);
		717	PUSHs (fullname);
		718	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		719	PUTBACK;
		720	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		721	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		722	SPAGAIN;
		723	FREETMPS;
		724	LEAVE;
		725	PL_runops = runops_trace;
		726	}
		727
		728	if (oldcop != PL_curcop)
		729	{
		730	oldcop = PL_curcop;
		731
		732	if (PL_curcop != &PL_compiling)
		733	{
		734	SV **cb;
		735
		736	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		737	{
		738	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		739
		740	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		741	{
		742	runops_proc_t old_runops = PL_runops;
		743	dSP;
		744	GV *gv = CvGV (cx->blk_sub.cv);
		745	SV *fullname = sv_2mortal (newSV (0));
		746
		747	if (isGV (gv))
		748	gv_efullname3 (fullname, gv, 0);
		749
		750	PL_runops = RUNOPS_DEFAULT;
		751	ENTER;
		752	SAVETMPS;
		753	EXTEND (SP, 3);
		754	PUSHMARK (SP);
		755	PUSHs (&PL_sv_yes);
		756	PUSHs (fullname);
		757	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		758	PUTBACK;
		759	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		760	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		761	SPAGAIN;
		762	FREETMPS;
		763	LEAVE;
		764	PL_runops = runops_trace;
		765	}
		766
		767	oldcxix = cxstack_ix;
		768	}
		769
		770	if (cctx->flags & CC_TRACE_LINE)
		771	{
		772	dSP;
		773
		774	PL_runops = RUNOPS_DEFAULT;
		775	ENTER;
		776	SAVETMPS;
		777	EXTEND (SP, 3);
		778	PL_runops = RUNOPS_DEFAULT;
		779	PUSHMARK (SP);
		780	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		781	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		782	PUTBACK;
		783	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		784	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		785	SPAGAIN;
		786	FREETMPS;
		787	LEAVE;
		788	PL_runops = runops_trace;
		789	}
		790	}
		791	}
		792	}
		793	}
		794
		795	TAINT_NOT;
		796	return 0;
		797	}
		798
549	/* inject a fake call to Coro::State::_cctx_init into the execution */	799	/* inject a fake call to Coro::State::_cctx_init into the execution */
		800	/* _cctx_init should be careful, as it could be called at almost any time */
		801	/* during execution of a perl program */
550	static void NOINLINE	802	static void NOINLINE
551	prepare_cctx (coro_cctx *cctx)	803	prepare_cctx (pTHX_ coro_cctx *cctx)
552	{	804	{
553	dSP;	805	dSP;
554	LOGOP myop;	806	LOGOP myop;
		807
		808	PL_top_env = &PL_start_env;
		809
		810	if (cctx->flags & CC_TRACE)
		811	PL_runops = runops_trace;
555		812
556	Zero (&myop, 1, LOGOP);	813	Zero (&myop, 1, LOGOP);
557	myop.op_next = PL_op;	814	myop.op_next = PL_op;
558	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	815	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559		816
…		…
565	PL_op = (OP *)&myop;	822	PL_op = (OP *)&myop;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	823	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	824	SPAGAIN;
568	}	825	}
569		826
		827	/*
		828	* this is a _very_ stripped down perl interpreter ;)
		829	*/
570	static void	830	static void
571	coro_run (void *arg)	831	coro_run (void *arg)
572	{	832	{
		833	dTHX;
		834
573	/* coro_run is the alternative tail of transfer(), so unlock here. */	835	/* coro_run is the alternative tail of transfer(), so unlock here. */
574	UNLOCK;	836	UNLOCK;
575		837
576	/*	838	/* we now skip the entersub that lead to transfer() */
577	* this is a _very_ stripped down perl interpreter ;)	839	PL_op = PL_op->op_next;
578	*/
579	PL_top_env = &PL_start_env;
580		840
581	/* inject call to cctx_init */	841	/* inject a fake subroutine call to cctx_init */
582	prepare_cctx ((coro_cctx *)arg);	842	prepare_cctx (aTHX_ (coro_cctx *)arg);
583		843
584	/* somebody will hit me for both perl_run and PL_restartop */	844	/* somebody or something will hit me for both perl_run and PL_restartop */
585	PL_restartop = PL_op;	845	PL_restartop = PL_op;
586	perl_run (PL_curinterp);	846	perl_run (PL_curinterp);
587		847
588	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	848	/*
589	abort ();	849	* If perl-run returns we assume exit() was being called or the coro
		850	* fell off the end, which seems to be the only valid (non-bug)
		851	* reason for perl_run to return. We try to exit by jumping to the
		852	* bootstrap-time "top" top_env, as we cannot restore the "main"
		853	* coroutine as Coro has no such concept
		854	*/
		855	PL_top_env = main_top_env;
		856	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
590	}	857	}
591		858
592	static coro_cctx *	859	static coro_cctx *
593	cctx_new ()	860	cctx_new ()
594	{	861	{
595	coro_cctx *cctx;	862	coro_cctx *cctx;
		863	void *stack_start;
		864	size_t stack_size;
596		865
597	++cctx_count;	866	++cctx_count;
598		867
599	Newz (0, cctx, 1, coro_cctx);	868	Newz (0, cctx, 1, coro_cctx);
600		869
601	#if HAVE_MMAP	870	#if HAVE_MMAP
602		871
603	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	872	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
604	/* mmap supposedly does allocate-on-write for us */	873	/* mmap supposedly does allocate-on-write for us */
605	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	874	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
606		875
607	if (cctx->sptr == (void *)-1)	876	if (cctx->sptr != (void *)-1)
608	{
609	perror ("FATAL: unable to mmap stack for coroutine");
610	_exit (EXIT_FAILURE);
611	}	877	{
612
613	# if STACKGUARD	878	# if CORO_STACKGUARD
614	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	879	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
615	# endif	880	# endif
		881	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		882	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		883	cctx->flags |= CC_MAPPED;
		884	}
		885	else
		886	#endif
		887	{
		888	cctx->ssize = coro_stacksize * (long)sizeof (long);
		889	New (0, cctx->sptr, coro_stacksize, long);
616		890
617	#else
618
619	cctx->ssize = STACKSIZE * (long)sizeof (long);
620	New (0, cctx->sptr, STACKSIZE, long);
621
622	if (!cctx->sptr)	891	if (!cctx->sptr)
623	{	892	{
624	perror ("FATAL: unable to malloc stack for coroutine");	893	perror ("FATAL: unable to allocate stack for coroutine");
625	_exit (EXIT_FAILURE);	894	_exit (EXIT_FAILURE);
626	}	895	}
627		896
628	#endif	897	stack_start = cctx->sptr;
		898	stack_size = cctx->ssize;
		899	}
629		900
630	#if USE_VALGRIND	901	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
631	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
632	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
633	cctx->ssize + (char *)cctx->sptr
634	);
635	#endif
636
637	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	902	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
638		903
639	return cctx;	904	return cctx;
640	}	905	}
641		906
642	static void	907	static void
…		…
645	if (!cctx)	910	if (!cctx)
646	return;	911	return;
647		912
648	--cctx_count;	913	--cctx_count;
649		914
650	#if USE_VALGRIND	915	#if CORO_USE_VALGRIND
651	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	916	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
652	#endif	917	#endif
653		918
654	#if HAVE_MMAP	919	#if HAVE_MMAP
		920	if (cctx->flags & CC_MAPPED)
655	munmap (cctx->sptr, cctx->ssize);	921	munmap (cctx->sptr, cctx->ssize);
656	#else	922	else
		923	#endif
657	Safefree (cctx->sptr);	924	Safefree (cctx->sptr);
658	#endif
659		925
660	Safefree (cctx);	926	Safefree (cctx);
661	}	927	}
662		928
663	static coro_cctx *	929	static coro_cctx *
664	cctx_get ()	930	cctx_get (pTHX)
665	{	931	{
666	coro_cctx *cctx;
667
668	if (cctx_first)	932	while (cctx_first)
669	{	933	{
670	cctx = cctx_first;	934	coro_cctx *cctx = cctx_first;
671	cctx_first = cctx->next;	935	cctx_first = cctx->next;
672	--cctx_idle;	936	--cctx_idle;
673	}	937
674	else	938	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
675	{	939	return cctx;
676	cctx = cctx_new ();	940
677	PL_op = PL_op->op_next;	941	cctx_destroy (cctx);
678	}	942	}
679		943
680	return cctx;	944	return cctx_new ();
681	}	945	}
682		946
683	static void	947	static void
684	cctx_put (coro_cctx *cctx)	948	cctx_put (coro_cctx *cctx)
685	{	949	{
…		…
688	{	952	{
689	coro_cctx *first = cctx_first;	953	coro_cctx *first = cctx_first;
690	cctx_first = first->next;	954	cctx_first = first->next;
691	--cctx_idle;	955	--cctx_idle;
692		956
693	assert (!first->inuse);
694	cctx_destroy (first);	957	cctx_destroy (first);
695	}	958	}
696		959
697	++cctx_idle;	960	++cctx_idle;
698	cctx->next = cctx_first;	961	cctx->next = cctx_first;
699	cctx_first = cctx;	962	cctx_first = cctx;
700	}	963	}
701		964
702	/* never call directly, always through the coro_state_transfer global variable */	965	/** coroutine switching *****************************************************/
		966
703	static void NOINLINE	967	static void NOINLINE
		968	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		969	{
		970	if (prev != next)
		971	{
		972	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		973	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		974
		975	if (next->flags & CF_RUNNING)
		976	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		977
		978	if (next->flags & CF_DESTROYED)
		979	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		980
		981	if (PL_lex_state != LEX_NOTPARSING)
		982	croak ("Coro::State::transfer called while parsing, but this is not supported");
		983	}
		984	}
		985
		986	/* always use the TRANSFER macro */
		987	static void NOINLINE
704	transfer (struct coro *prev, struct coro *next)	988	transfer (pTHX_ struct coro *prev, struct coro *next)
705	{	989	{
706	dSTACKLEVEL;	990	dSTACKLEVEL;
707		991
708	/* sometimes transfer is only called to set idle_sp */	992	/* sometimes transfer is only called to set idle_sp */
709	if (!next)	993	if (!next)
710	{	994	{
711	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	995	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
712	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */	996	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
713	}	997	}
714	else if (prev != next)	998	else if (prev != next)
715	{	999	{
716	coro_cctx *prev__cctx;	1000	coro_cctx *prev__cctx;
717		1001
718	if (prev->flags & CF_NEW)	1002	if (prev->flags & CF_NEW)
719	{	1003	{
720	/* create a new empty context */	1004	/* create a new empty context */
721	Newz (0, prev->cctx, 1, coro_cctx);	1005	Newz (0, prev->cctx, 1, coro_cctx);
722	prev->cctx->inuse = 1;
723	prev->flags &= ~CF_NEW;	1006	prev->flags &= ~CF_NEW;
724	prev->flags |= CF_RUNNING;	1007	prev->flags |= CF_RUNNING;
725	}	1008	}
726
727	/*TODO: must not croak here */
728	if (!prev->flags & CF_RUNNING)
729	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
730
731	if (next->flags & CF_RUNNING)
732	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
733		1009
734	prev->flags &= ~CF_RUNNING;	1010	prev->flags &= ~CF_RUNNING;
735	next->flags |= CF_RUNNING;	1011	next->flags |= CF_RUNNING;
736		1012
737	LOCK;	1013	LOCK;
…		…
739	if (next->flags & CF_NEW)	1015	if (next->flags & CF_NEW)
740	{	1016	{
741	/* need to start coroutine */	1017	/* need to start coroutine */
742	next->flags &= ~CF_NEW;	1018	next->flags &= ~CF_NEW;
743	/* first get rid of the old state */	1019	/* first get rid of the old state */
744	save_perl (prev);	1020	save_perl (aTHX_ prev);
745	/* setup coroutine call */	1021	/* setup coroutine call */
746	setup_coro (next);	1022	coro_setup (aTHX_ next);
747	/* need a new stack */
748	assert (!next->cctx);
749	}	1023	}
750	else	1024	else
751	{	1025	{
752	/* coroutine already started */	1026	/* coroutine already started */
753	save_perl (prev);	1027	save_perl (aTHX_ prev);
754	load_perl (next);	1028	load_perl (aTHX_ next);
755	}	1029	}
756		1030
757	prev__cctx = prev->cctx;	1031	prev__cctx = prev->cctx;
758		1032
759	/* possibly "free" the cctx */	1033	/* possibly "free" the cctx */
760	if (prev__cctx->idle_sp == STACKLEVEL)	1034	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
761	{	1035	{
762	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1036	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
763	assert (PL_top_env == prev__cctx->top_env);	1037	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
764		1038
765	prev->cctx = 0;	1039	prev->cctx = 0;
766		1040
767	cctx_put (prev__cctx);	1041	cctx_put (prev__cctx);
768	prev__cctx->inuse = 0;
769	}	1042	}
770		1043
		1044	++next->usecount;
		1045
771	if (!next->cctx)	1046	if (!next->cctx)
772	{
773	next->cctx = cctx_get ();	1047	next->cctx = cctx_get (aTHX);
774	assert (!next->cctx->inuse);
775	next->cctx->inuse = 1;
776	}
777		1048
778	if (prev__cctx != next->cctx)	1049	if (prev__cctx != next->cctx)
779	{	1050	{
780	prev__cctx->top_env = PL_top_env;	1051	prev__cctx->top_env = PL_top_env;
781	PL_top_env = next->cctx->top_env;	1052	PL_top_env = next->cctx->top_env;
782	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1053	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
783	}	1054	}
784		1055
785	free_coro_mortal ();	1056	free_coro_mortal (aTHX);
786
787	UNLOCK;	1057	UNLOCK;
788	}	1058	}
789	}	1059	}
790		1060
791	struct transfer_args	1061	struct transfer_args
792	{	1062	{
793	struct coro *prev, *next;	1063	struct coro *prev, *next;
794	};	1064	};
795		1065
796	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1066	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1067	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
797		1068
		1069	/** high level stuff ********************************************************/
		1070
798	static void	1071	static int
799	coro_state_destroy (struct coro *coro)	1072	coro_state_destroy (pTHX_ struct coro *coro)
800	{	1073	{
801	if (coro->refcnt--)	1074	if (coro->flags & CF_DESTROYED)
802	return;	1075	return 0;
		1076
		1077	coro->flags |= CF_DESTROYED;
		1078
		1079	if (coro->flags & CF_READY)
		1080	{
		1081	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1082	/* alternative: look through all ready queues and remove the coro */
		1083	LOCK;
		1084	--coro_nready;
		1085	UNLOCK;
		1086	}
		1087	else
		1088	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
803		1089
804	if (coro->mainstack && coro->mainstack != main_mainstack)	1090	if (coro->mainstack && coro->mainstack != main_mainstack)
805	{	1091	{
806	struct coro temp;	1092	struct coro temp;
807	Zero (&temp, 1, struct coro);
808	temp.save = CORO_SAVE_ALL;
809		1093
810	if (coro->flags & CF_RUNNING)	1094	if (coro->flags & CF_RUNNING)
811	croak ("FATAL: tried to destroy currently running coroutine");	1095	croak ("FATAL: tried to destroy currently running coroutine");
812		1096
813	save_perl (&temp);	1097	save_perl (aTHX_ &temp);
814	load_perl (coro);	1098	load_perl (aTHX_ coro);
815		1099
816	coro_destroy_stacks ();	1100	coro_destroy (aTHX_ coro);
817		1101
818	load_perl (&temp); /* this will get rid of defsv etc.. */	1102	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
819		1103
820	coro->mainstack = 0;	1104	coro->mainstack = 0;
821	}	1105	}
822		1106
823	cctx_destroy (coro->cctx);	1107	cctx_destroy (coro->cctx);
824	SvREFCNT_dec (coro->args);	1108	SvREFCNT_dec (coro->args);
825	Safefree (coro);	1109
		1110	if (coro->next) coro->next->prev = coro->prev;
		1111	if (coro->prev) coro->prev->next = coro->next;
		1112	if (coro == coro_first) coro_first = coro->next;
		1113
		1114	return 1;
826	}	1115	}
827		1116
828	static int	1117	static int
829	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1118	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
830	{	1119	{
831	struct coro *coro = (struct coro *)mg->mg_ptr;	1120	struct coro *coro = (struct coro *)mg->mg_ptr;
832	mg->mg_ptr = 0;	1121	mg->mg_ptr = 0;
833		1122
		1123	coro->hv = 0;
		1124
		1125	if (--coro->refcnt < 0)
		1126	{
834	coro_state_destroy (coro);	1127	coro_state_destroy (aTHX_ coro);
		1128	Safefree (coro);
		1129	}
835		1130
836	return 0;	1131	return 0;
837	}	1132	}
838		1133
839	static int	1134	static int
…		…
846	return 0;	1141	return 0;
847	}	1142	}
848		1143
849	static MGVTBL coro_state_vtbl = {	1144	static MGVTBL coro_state_vtbl = {
850	0, 0, 0, 0,	1145	0, 0, 0, 0,
851	coro_state_clear,	1146	coro_state_free,
852	0,	1147	0,
853	#ifdef MGf_DUP	1148	#ifdef MGf_DUP
854	coro_state_dup,	1149	coro_state_dup,
855	#else	1150	#else
856	# define MGf_DUP 0	1151	# define MGf_DUP 0
857	#endif	1152	#endif
858	};	1153	};
859		1154
860	static struct coro *
861	SvSTATE (SV *coro)
862	{
863	HV *stash;
864	MAGIC *mg;
865
866	if (SvROK (coro))
867	coro = SvRV (coro);
868
869	stash = SvSTASH (coro);
870	if (stash != coro_stash && stash != coro_state_stash)
871	{
872	/* very slow, but rare, check */
873	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
874	croak ("Coro::State object required");
875	}
876
877	mg = SvMAGIC (coro);
878	assert (mg->mg_type == PERL_MAGIC_ext);
879	return (struct coro *)mg->mg_ptr;
880	}
881
882	static void	1155	static void
883	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1156	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
884	{	1157	{
885	ta->prev = SvSTATE (prev_sv);	1158	ta->prev = SvSTATE (prev_sv);
886	ta->next = SvSTATE (next_sv);	1159	ta->next = SvSTATE (next_sv);
		1160	TRANSFER_CHECK (*ta);
887	}	1161	}
888		1162
889	static void	1163	static void
890	api_transfer (SV *prev_sv, SV *next_sv)	1164	api_transfer (SV *prev_sv, SV *next_sv)
891	{	1165	{
		1166	dTHX;
892	struct transfer_args ta;	1167	struct transfer_args ta;
893		1168
894	prepare_transfer (&ta, prev_sv, next_sv);	1169	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
895	TRANSFER (ta);	1170	TRANSFER (ta);
896	}	1171	}
897		1172
898	static int
899	api_save (SV *coro_sv, int new_save)
900	{
901	struct coro *coro = SvSTATE (coro_sv);
902	int old_save = coro->save;
903
904	if (new_save >= 0)
905	coro->save = new_save;
906
907	return old_save;
908	}
909
910	/** Coro ********************************************************************/	1173	/** Coro ********************************************************************/
911		1174
912	#define PRIO_MAX 3
913	#define PRIO_HIGH 1
914	#define PRIO_NORMAL 0
915	#define PRIO_LOW -1
916	#define PRIO_IDLE -3
917	#define PRIO_MIN -4
918
919	/* for Coro.pm */
920	static SV *coro_current;
921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
922	static int coro_nready;
923
924	static void	1175	static void
925	coro_enq (SV *coro_sv)	1176	coro_enq (pTHX_ SV *coro_sv)
926	{	1177	{
927	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1178	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
928	coro_nready++;
929	}	1179	}
930		1180
931	static SV *	1181	static SV *
932	coro_deq (int min_prio)	1182	coro_deq (pTHX_ int min_prio)
933	{	1183	{
934	int prio = PRIO_MAX - PRIO_MIN;	1184	int prio = PRIO_MAX - PRIO_MIN;
935		1185
936	min_prio -= PRIO_MIN;	1186	min_prio -= PRIO_MIN;
937	if (min_prio < 0)	1187	if (min_prio < 0)
938	min_prio = 0;	1188	min_prio = 0;
939		1189
940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1190	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
941	if (AvFILLp (coro_ready [prio]) >= 0)	1191	if (AvFILLp (coro_ready [prio]) >= 0)
942	{
943	coro_nready--;
944	return av_shift (coro_ready [prio]);	1192	return av_shift (coro_ready [prio]);
945	}
946		1193
947	return 0;	1194	return 0;
948	}	1195	}
949		1196
950	static int	1197	static int
951	api_ready (SV *coro_sv)	1198	api_ready (SV *coro_sv)
952	{	1199	{
		1200	dTHX;
953	struct coro *coro;	1201	struct coro *coro;
954		1202
955	if (SvROK (coro_sv))	1203	if (SvROK (coro_sv))
956	coro_sv = SvRV (coro_sv);	1204	coro_sv = SvRV (coro_sv);
957		1205
958	coro = SvSTATE (coro_sv);	1206	coro = SvSTATE (coro_sv);
959		1207
960	if (coro->flags & CF_READY)	1208	if (coro->flags & CF_READY)
961	return 0;	1209	return 0;
962		1210
963	#if 0 /* this is actually harmless */
964	if (coro->flags & CF_RUNNING)
965	croak ("Coro::ready called on currently running coroutine");
966	#endif
967
968	coro->flags |= CF_READY;	1211	coro->flags |= CF_READY;
969		1212
970	LOCK;	1213	LOCK;
971	coro_enq (SvREFCNT_inc (coro_sv));	1214	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1215	++coro_nready;
972	UNLOCK;	1216	UNLOCK;
973		1217
974	return 1;	1218	return 1;
975	}	1219	}
976		1220
977	static int	1221	static int
978	api_is_ready (SV *coro_sv)	1222	api_is_ready (SV *coro_sv)
979	{	1223	{
		1224	dTHX;
980	return !!SvSTATE (coro_sv)->flags & CF_READY;	1225	return !!(SvSTATE (coro_sv)->flags & CF_READY);
981	}	1226	}
982		1227
983	static void	1228	static void
984	prepare_schedule (struct transfer_args *ta)	1229	prepare_schedule (pTHX_ struct transfer_args *ta)
985	{	1230	{
986	SV *prev, *next;	1231	SV *prev_sv, *next_sv;
987		1232
988	for (;;)	1233	for (;;)
989	{	1234	{
990	LOCK;	1235	LOCK;
991	next = coro_deq (PRIO_MIN);	1236	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1237
		1238	/* nothing to schedule: call the idle handler */
		1239	if (!next_sv)
		1240	{
		1241	dSP;
		1242	UNLOCK;
		1243
		1244	ENTER;
		1245	SAVETMPS;
		1246
		1247	PUSHMARK (SP);
		1248	PUTBACK;
		1249	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1250
		1251	FREETMPS;
		1252	LEAVE;
		1253	continue;
		1254	}
		1255
		1256	ta->next = SvSTATE (next_sv);
		1257
		1258	/* cannot transfer to destroyed coros, skip and look for next */
		1259	if (ta->next->flags & CF_DESTROYED)
		1260	{
		1261	UNLOCK;
		1262	SvREFCNT_dec (next_sv);
		1263	/* coro_nready is already taken care of by destroy */
		1264	continue;
		1265	}
		1266
		1267	--coro_nready;
992	UNLOCK;	1268	UNLOCK;
993
994	if (next)
995	break;	1269	break;
996
997	{
998	dSP;
999
1000	ENTER;
1001	SAVETMPS;
1002
1003	PUSHMARK (SP);
1004	PUTBACK;
1005	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1006
1007	FREETMPS;
1008	LEAVE;
1009	}	1270	}
1010	}
1011
1012	prev = SvRV (coro_current);
1013	SvRV_set (coro_current, next);
1014		1271
1015	/* free this only after the transfer */	1272	/* free this only after the transfer */
1016	LOCK;	1273	prev_sv = SvRV (coro_current);
1017	free_coro_mortal ();
1018	UNLOCK;
1019	coro_mortal = prev;
1020
1021	assert (!SvROK(prev));//D
1022	assert (!SvROK(next));//D
1023
1024	ta->prev = SvSTATE (prev);	1274	ta->prev = SvSTATE (prev_sv);
1025	ta->next = SvSTATE (next);	1275	TRANSFER_CHECK (*ta);
1026
1027	assert (ta->next->flags & CF_READY);	1276	assert (ta->next->flags & CF_READY);
1028	ta->next->flags &= ~CF_READY;	1277	ta->next->flags &= ~CF_READY;
1029	}	1278	SvRV_set (coro_current, next_sv);
1030		1279
		1280	LOCK;
		1281	free_coro_mortal (aTHX);
		1282	coro_mortal = prev_sv;
		1283	UNLOCK;
		1284	}
		1285
1031	static void	1286	static void
1032	prepare_cede (struct transfer_args *ta)	1287	prepare_cede (pTHX_ struct transfer_args *ta)
1033	{	1288	{
1034	api_ready (coro_current);	1289	api_ready (coro_current);
1035
1036	prepare_schedule (ta);	1290	prepare_schedule (aTHX_ ta);
		1291	}
		1292
		1293	static int
		1294	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1295	{
		1296	if (coro_nready)
		1297	{
		1298	SV *prev = SvRV (coro_current);
		1299	prepare_schedule (aTHX_ ta);
		1300	api_ready (prev);
		1301	return 1;
		1302	}
		1303	else
		1304	return 0;
1037	}	1305	}
1038		1306
1039	static void	1307	static void
1040	api_schedule (void)	1308	api_schedule (void)
1041	{	1309	{
		1310	dTHX;
1042	struct transfer_args ta;	1311	struct transfer_args ta;
1043		1312
1044	prepare_schedule (&ta);	1313	prepare_schedule (aTHX_ &ta);
1045	TRANSFER (ta);	1314	TRANSFER (ta);
1046	}	1315	}
1047		1316
1048	static void	1317	static int
1049	api_cede (void)	1318	api_cede (void)
1050	{	1319	{
		1320	dTHX;
1051	struct transfer_args ta;	1321	struct transfer_args ta;
1052		1322
1053	prepare_cede (&ta);	1323	prepare_cede (aTHX_ &ta);
		1324
		1325	if (ta.prev != ta.next)
		1326	{
1054	TRANSFER (ta);	1327	TRANSFER (ta);
		1328	return 1;
		1329	}
		1330	else
		1331	return 0;
1055	}	1332	}
1056		1333
		1334	static int
		1335	api_cede_notself (void)
		1336	{
		1337	dTHX;
		1338	struct transfer_args ta;
		1339
		1340	if (prepare_cede_notself (aTHX_ &ta))
		1341	{
		1342	TRANSFER (ta);
		1343	return 1;
		1344	}
		1345	else
		1346	return 0;
		1347	}
		1348
		1349	static void
		1350	api_trace (SV *coro_sv, int flags)
		1351	{
		1352	dTHX;
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354
		1355	if (flags & CC_TRACE)
		1356	{
		1357	if (!coro->cctx)
		1358	coro->cctx = cctx_new ();
		1359	else if (!(coro->cctx->flags & CC_TRACE))
		1360	croak ("cannot enable tracing on coroutine with custom stack");
		1361
		1362	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1363	}
		1364	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1365	{
		1366	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1367
		1368	if (coro->flags & CF_RUNNING)
		1369	PL_runops = RUNOPS_DEFAULT;
		1370	else
		1371	coro->runops = RUNOPS_DEFAULT;
		1372	}
		1373	}
		1374
1057	MODULE = Coro::State PACKAGE = Coro::State	1375	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1058		1376
1059	PROTOTYPES: DISABLE	1377	PROTOTYPES: DISABLE
1060		1378
1061	BOOT:	1379	BOOT:
1062	{	1380	{
1063	#ifdef USE_ITHREADS	1381	#ifdef USE_ITHREADS
1064	MUTEX_INIT (&coro_mutex);	1382	MUTEX_INIT (&coro_mutex);
1065	#endif	1383	#endif
1066	BOOT_PAGESIZE;	1384	BOOT_PAGESIZE;
1067		1385
		1386	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1387
1068	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1388	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1069		1389
		1390	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1391	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1070	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1071	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1072	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1073	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1074	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1075		1394
1076	main_mainstack = PL_mainstack;	1395	main_mainstack = PL_mainstack;
		1396	main_top_env = PL_top_env;
		1397
		1398	while (main_top_env->je_prev)
		1399	main_top_env = main_top_env->je_prev;
1077		1400
1078	coroapi.ver = CORO_API_VERSION;	1401	coroapi.ver = CORO_API_VERSION;
1079	coroapi.transfer = api_transfer;	1402	coroapi.transfer = api_transfer;
1080		1403
1081	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1404	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1088	struct coro *coro;	1411	struct coro *coro;
1089	HV *hv;	1412	HV *hv;
1090	int i;	1413	int i;
1091		1414
1092	Newz (0, coro, 1, struct coro);	1415	Newz (0, coro, 1, struct coro);
1093	coro->args = newAV ();	1416	coro->args = newAV ();
1094	coro->save = CORO_SAVE_ALL;
1095	coro->flags = CF_NEW;	1417	coro->flags = CF_NEW;
1096		1418
		1419	if (coro_first) coro_first->prev = coro;
		1420	coro->next = coro_first;
		1421	coro_first = coro;
		1422
1097	hv = newHV ();	1423	coro->hv = hv = newHV ();
1098	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1424	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1099	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1425	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1100		1426
1101	for (i = 1; i < items; i++)	1427	for (i = 1; i < items; i++)
1102	av_push (coro->args, newSVsv (ST (i)));	1428	av_push (coro->args, newSVsv (ST (i)));
1103	}	1429	}
1104	OUTPUT:	1430	OUTPUT:
1105	RETVAL	1431	RETVAL
1106		1432
1107	int	1433	# these not obviously related functions are all rolled into the same xs
1108	save (SV *coro, int new_save = -1)	1434	# function to increase chances that they all will call transfer with the same
1109	CODE:	1435	# stack offset
1110	RETVAL = api_save (coro, new_save);
1111	OUTPUT:
1112	RETVAL
1113
1114	void	1436	void
1115	_set_stacklevel (...)	1437	_set_stacklevel (...)
1116	ALIAS:	1438	ALIAS:
1117	Coro::State::transfer = 1	1439	Coro::State::transfer = 1
1118	Coro::schedule = 2	1440	Coro::schedule = 2
1119	Coro::cede = 3	1441	Coro::cede = 3
		1442	Coro::cede_notself = 4
1120	CODE:	1443	CODE:
1121	{	1444	{
1122	struct transfer_args ta;	1445	struct transfer_args ta;
1123		1446
1124	switch (ix)	1447	switch (ix)
…		…
1130		1453
1131	case 1:	1454	case 1:
1132	if (items != 2)	1455	if (items != 2)
1133	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1456	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1134		1457
1135	prepare_transfer (&ta, ST (0), ST (1));	1458	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1136	break;	1459	break;
1137		1460
1138	case 2:	1461	case 2:
1139	prepare_schedule (&ta);	1462	prepare_schedule (aTHX_ &ta);
1140	break;	1463	break;
1141		1464
1142	case 3:	1465	case 3:
1143	prepare_cede (&ta);	1466	prepare_cede (aTHX_ &ta);
		1467	break;
		1468
		1469	case 4:
		1470	if (!prepare_cede_notself (aTHX_ &ta))
		1471	XSRETURN_EMPTY;
		1472
1144	break;	1473	break;
1145	}	1474	}
1146		1475
		1476	BARRIER;
1147	TRANSFER (ta);	1477	TRANSFER (ta);
1148	}
1149		1478
1150	void	1479	if (GIMME_V != G_VOID && ta.next != ta.prev)
1151	_clone_state_from (SV *dst, SV *src)	1480	XSRETURN_YES;
		1481	}
		1482
		1483	bool
		1484	_destroy (SV *coro_sv)
1152	CODE:	1485	CODE:
1153	{	1486	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1154	struct coro *coro_src = SvSTATE (src);	1487	OUTPUT:
1155		1488	RETVAL
1156	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1157
1158	++coro_src->refcnt;
1159	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1160	}
1161		1489
1162	void	1490	void
1163	_exit (code)	1491	_exit (code)
1164	int code	1492	int code
1165	PROTOTYPE: $	1493	PROTOTYPE: $
1166	CODE:	1494	CODE:
1167	_exit (code);	1495	_exit (code);
1168		1496
1169	int	1497	int
		1498	cctx_stacksize (int new_stacksize = 0)
		1499	CODE:
		1500	RETVAL = coro_stacksize;
		1501	if (new_stacksize)
		1502	coro_stacksize = new_stacksize;
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	int
1170	cctx_count ()	1507	cctx_count ()
1171	CODE:	1508	CODE:
1172	RETVAL = cctx_count;	1509	RETVAL = cctx_count;
1173	OUTPUT:	1510	OUTPUT:
1174	RETVAL	1511	RETVAL
…		…
1178	CODE:	1515	CODE:
1179	RETVAL = cctx_idle;	1516	RETVAL = cctx_idle;
1180	OUTPUT:	1517	OUTPUT:
1181	RETVAL	1518	RETVAL
1182		1519
		1520	void
		1521	list ()
		1522	PPCODE:
		1523	{
		1524	struct coro *coro;
		1525	for (coro = coro_first; coro; coro = coro->next)
		1526	if (coro->hv)
		1527	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1528	}
		1529
		1530	void
		1531	call (Coro::State coro, SV *coderef)
		1532	ALIAS:
		1533	eval = 1
		1534	CODE:
		1535	{
		1536	if (coro->mainstack)
		1537	{
		1538	struct coro temp;
		1539	Zero (&temp, 1, struct coro);
		1540
		1541	if (!(coro->flags & CF_RUNNING))
		1542	{
		1543	save_perl (aTHX_ &temp);
		1544	load_perl (aTHX_ coro);
		1545	}
		1546
		1547	{
		1548	dSP;
		1549	ENTER;
		1550	SAVETMPS;
		1551	PUSHMARK (SP);
		1552	PUTBACK;
		1553	if (ix)
		1554	eval_sv (coderef, 0);
		1555	else
		1556	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1557	SPAGAIN;
		1558	FREETMPS;
		1559	LEAVE;
		1560	PUTBACK;
		1561	}
		1562
		1563	if (!(coro->flags & CF_RUNNING))
		1564	{
		1565	save_perl (aTHX_ coro);
		1566	load_perl (aTHX_ &temp);
		1567	}
		1568	}
		1569	}
		1570
		1571	SV *
		1572	is_ready (Coro::State coro)
		1573	PROTOTYPE: $
		1574	ALIAS:
		1575	is_ready = CF_READY
		1576	is_running = CF_RUNNING
		1577	is_new = CF_NEW
		1578	is_destroyed = CF_DESTROYED
		1579	CODE:
		1580	RETVAL = boolSV (coro->flags & ix);
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	void
		1585	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1586
		1587	SV *
		1588	has_stack (Coro::State coro)
		1589	PROTOTYPE: $
		1590	CODE:
		1591	RETVAL = boolSV (!!coro->cctx);
		1592	OUTPUT:
		1593	RETVAL
		1594
		1595	int
		1596	is_traced (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	IV
		1604	rss (Coro::State coro)
		1605	PROTOTYPE: $
		1606	ALIAS:
		1607	usecount = 1
		1608	CODE:
		1609	switch (ix)
		1610	{
		1611	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1612	case 1: RETVAL = coro->usecount; break;
		1613	}
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617
1183	MODULE = Coro::State PACKAGE = Coro	1618	MODULE = Coro::State PACKAGE = Coro
1184		1619
1185	BOOT:	1620	BOOT:
1186	{	1621	{
1187	int i;	1622	int i;
		1623
		1624	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1625	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1626	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1627
		1628	coro_current = get_sv ("Coro::current", FALSE);
		1629	SvREADONLY_on (coro_current);
1188		1630
1189	coro_stash = gv_stashpv ("Coro", TRUE);	1631	coro_stash = gv_stashpv ("Coro", TRUE);
1190		1632
1191	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1633	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1192	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1634	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1193	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1635	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1194	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1636	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1195	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1637	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1196	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1638	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1197		1639
1198	coro_current = get_sv ("Coro::current", FALSE);
1199	SvREADONLY_on (coro_current);
1200
1201	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1640	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1202	coro_ready[i] = newAV ();	1641	coro_ready[i] = newAV ();
1203		1642
1204	{	1643	{
1205	SV *sv = perl_get_sv("Coro::API", 1);	1644	SV *sv = perl_get_sv("Coro::API", 1);
1206		1645
1207	coroapi.schedule = api_schedule;	1646	coroapi.schedule = api_schedule;
1208	coroapi.save = api_save;
1209	coroapi.cede = api_cede;	1647	coroapi.cede = api_cede;
		1648	coroapi.cede_notself = api_cede_notself;
1210	coroapi.ready = api_ready;	1649	coroapi.ready = api_ready;
1211	coroapi.is_ready = api_is_ready;	1650	coroapi.is_ready = api_is_ready;
1212	coroapi.nready = &coro_nready;	1651	coroapi.nready = &coro_nready;
1213	coroapi.current = coro_current;	1652	coroapi.current = coro_current;
1214		1653
1215	GCoroAPI = &coroapi;	1654	GCoroAPI = &coroapi;
1216	sv_setiv (sv, (IV)&coroapi);	1655	sv_setiv (sv, (IV)&coroapi);
1217	SvREADONLY_on (sv);	1656	SvREADONLY_on (sv);
1218	}	1657	}
…		…
1234	RETVAL = coro->prio;	1673	RETVAL = coro->prio;
1235		1674
1236	if (items > 1)	1675	if (items > 1)
1237	{	1676	{
1238	if (ix)	1677	if (ix)
1239	newprio += coro->prio;	1678	newprio = coro->prio - newprio;
1240		1679
1241	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1680	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1242	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1681	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1243		1682
1244	coro->prio = newprio;	1683	coro->prio = newprio;
1245	}	1684	}
1246	}	1685	}
		1686	OUTPUT:
		1687	RETVAL
1247		1688
1248	SV *	1689	SV *
1249	ready (SV *self)	1690	ready (SV *self)
1250	PROTOTYPE: $	1691	PROTOTYPE: $
1251	CODE:	1692	CODE:
1252	RETVAL = boolSV (api_ready (self));	1693	RETVAL = boolSV (api_ready (self));
1253	OUTPUT:	1694	OUTPUT:
1254	RETVAL	1695	RETVAL
1255		1696
1256	SV *
1257	is_ready (SV *self)
1258	PROTOTYPE: $
1259	CODE:
1260	RETVAL = boolSV (api_is_ready (self));
1261	OUTPUT:
1262	RETVAL
1263
1264	int	1697	int
1265	nready (...)	1698	nready (...)
1266	PROTOTYPE:	1699	PROTOTYPE:
1267	CODE:	1700	CODE:
1268	RETVAL = coro_nready;	1701	RETVAL = coro_nready;
1269	OUTPUT:	1702	OUTPUT:
1270	RETVAL	1703	RETVAL
1271		1704
		1705	# for async_pool speedup
		1706	void
		1707	_pool_1 (SV *cb)
		1708	CODE:
		1709	{
		1710	int i, len;
		1711	HV *hv = (HV *)SvRV (coro_current);
		1712	AV *defav = GvAV (PL_defgv);
		1713	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1714	AV *invoke_av;
		1715
		1716	if (!invoke)
		1717	croak ("\3terminate\2\n");
		1718
		1719	hv_store (hv, "desc", sizeof ("desc") - 1,
		1720	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1721
		1722	invoke_av = (AV *)SvRV (invoke);
		1723	len = av_len (invoke_av);
		1724
		1725	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1726
		1727	if (len > 0)
		1728	{
		1729	av_fill (defav, len - 1);
		1730	for (i = 0; i < len; ++i)
		1731	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1732	}
		1733
		1734	SvREFCNT_dec (invoke);
		1735	}
		1736
		1737	void
		1738	_pool_2 (SV *cb)
		1739	CODE:
		1740	{
		1741	struct coro *coro = SvSTATE (coro_current);
		1742
		1743	sv_setsv (cb, &PL_sv_undef);
		1744
		1745	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1746	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1747	croak ("\3terminate\2\n");
		1748
		1749	av_clear (GvAV (PL_defgv));
		1750	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1751	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1752
		1753	coro->prio = 0;
		1754
		1755	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1756	api_trace (coro_current, 0);
		1757
		1758	av_push (av_async_pool, newSVsv (coro_current));
		1759	}
		1760
		1761
1272	MODULE = Coro::State PACKAGE = Coro::AIO	1762	MODULE = Coro::State PACKAGE = Coro::AIO
1273		1763
1274	SV *	1764	SV *
1275	_get_state ()	1765	_get_state ()
1276	CODE:	1766	CODE:

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