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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.117 by root, Fri Dec 1 19:41:06 2006 UTC vs.
Revision 1.189 by root, Fri Oct 5 20:38:43 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		37
77	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
79	* 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. */
80	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
82		97
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		99
85	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
87	#else	103	#else
88	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
89	#endif	106	#endif
90		107
91	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
92		109
93	#include "CoroAPI.h"	110	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		111
97	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	116	#else
102	# define LOCK (void)0	117	# define LOCK (void)0
103	# define UNLOCK (void)0	118	# define UNLOCK (void)0
104	#endif	119	#endif
105		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;
106	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
107	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;
108	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
109	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
110		136
		137	static GV *irsgv; /* $/ */
		138	static GV *stdoutgv; /* *STDOUT */
		139
		140	/* async_pool helper stuff */
		141	static SV *sv_pool_rss;
		142	static SV *sv_pool_size;
		143	static AV *av_async_pool;
		144
111	static struct coro_cctx *cctx_first;	145	static struct coro_cctx *cctx_first;
112	static int cctx_count, cctx_idle;	146	static int cctx_count, cctx_idle;
		147
		148	enum {
		149	CC_MAPPED = 0x01,
		150	CC_NOREUSE = 0x02, /* throw this away after tracing */
		151	CC_TRACE = 0x04,
		152	CC_TRACE_SUB = 0x08, /* trace sub calls */
		153	CC_TRACE_LINE = 0x10, /* trace each statement */
		154	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		155	};
113		156
114	/* this is a structure representing a c-level coroutine */	157	/* this is a structure representing a c-level coroutine */
115	typedef struct coro_cctx {	158	typedef struct coro_cctx {
116	struct coro_cctx *next;	159	struct coro_cctx *next;
117		160
118	/* the stack */	161	/* the stack */
119	void *sptr;	162	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	163	size_t ssize;
121		164
122	/* cpu state */	165	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	166	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		167	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	168	JMPENV *top_env;
125	coro_context cctx;	169	coro_context cctx;
126		170
127	int inuse;
128
129	#if USE_VALGRIND	171	#if CORO_USE_VALGRIND
130	int valgrind_id;	172	int valgrind_id;
131	#endif	173	#endif
		174	unsigned char flags;
132	} coro_cctx;	175	} coro_cctx;
133		176
134	enum {	177	enum {
135	CF_RUNNING = 0x0001, /* coroutine is running */	178	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY = 0x0002, /* coroutine is ready */	179	CF_READY = 0x0002, /* coroutine is ready */
137	CF_NEW = 0x0004, /* ahs never been switched to */	180	CF_NEW = 0x0004, /* has never been switched to */
		181	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138	};	182	};
139		183
140	/* this is a structure representing a perl-level coroutine */	184	/* this is a structure representing a perl-level coroutine */
141	struct coro {	185	struct coro {
142	/* the c coroutine allocated to this perl coroutine, if any */	186	/* the c coroutine allocated to this perl coroutine, if any */
143	coro_cctx *cctx;	187	coro_cctx *cctx;
144		188
145	/* data associated with this coroutine (initial args) */	189	/* data associated with this coroutine (initial args) */
146	AV *args;	190	AV *args;
147	int refcnt;	191	int refcnt;
148	int flags;	192	int flags; /* CF_ flags */
149		193
150	/* optionally saved, might be zero */	194	/* optionally saved, might be zero */
151	AV *defav;	195	AV *defav; /* @_ */
152	SV *defsv;	196	SV *defsv; /* $_ */
153	SV *errsv;	197	SV *errsv; /* $@ */
		198	SV *deffh; /* default filehandle */
		199	SV *irssv; /* $/ */
		200	SV *irssv_sv; /* real $/ cache */
154		201
155	#define VAR(name,type) type name;	202	#define VAR(name,type) type name;
156	# include "state.h"	203	# include "state.h"
157	#undef VAR	204	#undef VAR
158		205
		206	/* statistics */
		207	int usecount; /* number of transfers to this coro */
		208
159	/* coro process data */	209	/* coro process data */
160	int prio;	210	int prio;
		211	//SV *throw;
		212
		213	/* async_pool */
		214	SV *saved_deffh;
		215
		216	/* linked list */
		217	struct coro *next, *prev;
		218	HV *hv; /* the perl hash associated with this coro, if any */
161	};	219	};
162		220
163	typedef struct coro *Coro__State;	221	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	222	typedef struct coro *Coro__State_or_hashref;
165		223
		224	/** Coro ********************************************************************/
		225
		226	#define PRIO_MAX 3
		227	#define PRIO_HIGH 1
		228	#define PRIO_NORMAL 0
		229	#define PRIO_LOW -1
		230	#define PRIO_IDLE -3
		231	#define PRIO_MIN -4
		232
		233	/* for Coro.pm */
		234	static SV *coro_current;
		235	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		236	static int coro_nready;
		237	static struct coro *coro_first;
		238
		239	/** lowlevel stuff **********************************************************/
		240
166	static AV *	241	static AV *
167	coro_clone_padlist (CV *cv)	242	coro_clone_padlist (pTHX_ CV *cv)
168	{	243	{
169	AV *padlist = CvPADLIST (cv);	244	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	245	AV *newpadlist, *newpad;
171		246
172	newpadlist = newAV ();	247	newpadlist = newAV ();
…		…
184		259
185	return newpadlist;	260	return newpadlist;
186	}	261	}
187		262
188	static void	263	static void
189	free_padlist (AV *padlist)	264	free_padlist (pTHX_ AV *padlist)
190	{	265	{
191	/* may be during global destruction */	266	/* may be during global destruction */
192	if (SvREFCNT (padlist))	267	if (SvREFCNT (padlist))
193	{	268	{
194	I32 i = AvFILLp (padlist);	269	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	290	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	291	AV *av = (AV *)mg->mg_obj;
217		292
218	/* casting is fun. */	293	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	294	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	295	free_padlist (aTHX_ padlist);
221		296
222	SvREFCNT_dec (av);	297	SvREFCNT_dec (av);
223		298
224	return 0;	299	return 0;
225	}	300	}
…		…
233	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	308	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234	? SvMAGIC (cv) \	309	? SvMAGIC (cv) \
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	310	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
236	: 0	311	: 0
237		312
		313	static struct coro *
		314	SvSTATE_ (pTHX_ SV *coro)
		315	{
		316	HV *stash;
		317	MAGIC *mg;
		318
		319	if (SvROK (coro))
		320	coro = SvRV (coro);
		321
		322	if (SvTYPE (coro) != SVt_PVHV)
		323	croak ("Coro::State object required");
		324
		325	stash = SvSTASH (coro);
		326	if (stash != coro_stash && stash != coro_state_stash)
		327	{
		328	/* very slow, but rare, check */
		329	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		330	croak ("Coro::State object required");
		331	}
		332
		333	mg = CORO_MAGIC (coro);
		334	return (struct coro *)mg->mg_ptr;
		335	}
		336
		337	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		338
238	/* the next two functions merely cache the padlists */	339	/* the next two functions merely cache the padlists */
239	static void	340	static void
240	get_padlist (CV *cv)	341	get_padlist (pTHX_ CV *cv)
241	{	342	{
242	MAGIC *mg = CORO_MAGIC (cv);	343	MAGIC *mg = CORO_MAGIC (cv);
243	AV *av;	344	AV *av;
244		345
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	346	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	347	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	348	else
248	{	349	{
249	#if 0	350	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	351	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	352	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	353	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	354	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	355	SvREFCNT_dec (cp);
255	#else	356	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	357	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	358	#endif
258	}	359	}
259	}	360	}
260		361
261	static void	362	static void
262	put_padlist (CV *cv)	363	put_padlist (pTHX_ CV *cv)
263	{	364	{
264	MAGIC *mg = CORO_MAGIC (cv);	365	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	366	AV *av;
266		367
267	if (!mg)	368	if (!mg)
…		…
278	av_extend (av, AvMAX (av) + 1);	379	av_extend (av, AvMAX (av) + 1);
279		380
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	381	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	382	}
282		383
283	#define SB do {	384	/** load & save, init *******************************************************/
284	#define SE } while (0)
285		385
286	#define LOAD(state) load_state ((state))
287	#define SAVE(state,flags) save_state ((state),(flags))
288
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290
291	static void	386	static void
292	load_state (Coro__State c)	387	load_perl (pTHX_ Coro__State c)
293	{	388	{
294	#define VAR(name,type) PL_ ## name = c->name;	389	#define VAR(name,type) PL_ ## name = c->name;
295	# include "state.h"	390	# include "state.h"
296	#undef VAR	391	#undef VAR
297		392
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	393	GvSV (PL_defgv) = c->defsv;
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	394	GvAV (PL_defgv) = c->defav;
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	395	GvSV (PL_errgv) = c->errsv;
		396	GvSV (irsgv) = c->irssv_sv;
301		397
302	{	398	{
303	dSP;	399	dSP;
304	CV *cv;	400	CV *cv;
305		401
306	/* now do the ugly restore mess */	402	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	403	while ((cv = (CV *)POPs))
308	{	404	{
309	put_padlist (cv); /* mark this padlist as available */	405	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	406	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	407	CvPADLIST (cv) = (AV *)POPs;
312	}	408	}
313		409
314	PUTBACK;	410	PUTBACK;
315	}	411	}
316	}	412	}
317		413
318	static void	414	static void
319	save_state (Coro__State c, int flags)	415	save_perl (pTHX_ Coro__State c)
320	{	416	{
321	{	417	{
322	dSP;	418	dSP;
323	I32 cxix = cxstack_ix;	419	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	420	PERL_CONTEXT *ccstk = cxstack;
…		…
327	/*	423	/*
328	* the worst thing you can imagine happens first - we have to save	424	* the worst thing you can imagine happens first - we have to save
329	* (and reinitialize) all cv's in the whole callchain :(	425	* (and reinitialize) all cv's in the whole callchain :(
330	*/	426	*/
331		427
332	PUSHs (Nullsv);	428	XPUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	429	/* this loop was inspired by pp_caller */
334	for (;;)	430	for (;;)
335	{	431	{
336	while (cxix >= 0)	432	while (cxix >= 0)
337	{	433	{
338	PERL_CONTEXT *cx = &ccstk[cxix--];	434	PERL_CONTEXT *cx = &ccstk[cxix--];
339		435
340	if (CxTYPE (cx) == CXt_SUB)	436	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
341	{	437	{
342	CV *cv = cx->blk_sub.cv;	438	CV *cv = cx->blk_sub.cv;
343		439
344	if (CvDEPTH (cv))	440	if (CvDEPTH (cv))
345	{	441	{
346	EXTEND (SP, 3);	442	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	443	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	444	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	445	PUSHs ((SV *)cv);
351		446
352	CvDEPTH (cv) = 0;	447	CvDEPTH (cv) = 0;
353	get_padlist (cv);	448	get_padlist (aTHX_ cv);
354	}	449	}
355	}	450	}
356	#ifdef CXt_FORMAT
357	else if (CxTYPE (cx) == CXt_FORMAT)
358	{
359	/* I never used formats, so how should I know how these are implemented? */
360	/* my bold guess is as a simple, plain sub... */
361	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362	}
363	#endif
364	}	451	}
365		452
366	if (top_si->si_type == PERLSI_MAIN)	453	if (top_si->si_type == PERLSI_MAIN)
367	break;	454	break;
368		455
369	top_si = top_si->si_prev;	456	top_si = top_si->si_prev;
370	ccstk = top_si->si_cxstack;	457	ccstk = top_si->si_cxstack;
371	cxix = top_si->si_cxix;	458	cxix = top_si->si_cxix;
372	}	459	}
373		460
374	PUTBACK;	461	PUTBACK;
375	}	462	}
376		463
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	464	c->defav = GvAV (PL_defgv);
378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	465	c->defsv = DEFSV;
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	466	c->errsv = ERRSV;
		467	c->irssv_sv = GvSV (irsgv);
380		468
381	#define VAR(name,type)c->name = PL_ ## name;	469	#define VAR(name,type)c->name = PL_ ## name;
382	# include "state.h"	470	# include "state.h"
383	#undef VAR	471	#undef VAR
384	}	472	}
…		…
387	* allocate various perl stacks. This is an exact copy	475	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	476	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	477	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	478	* not usually need a lot of stackspace.
391	*/	479	*/
		480	#if CORO_PREFER_PERL_FUNCTIONS
		481	# define coro_init_stacks init_stacks
		482	#else
392	static void	483	static void
393	coro_init_stacks ()	484	coro_init_stacks (pTHX)
394	{	485	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	486	PL_curstackinfo = new_stackinfo(64, 6);
396	PL_curstackinfo->si_type = PERLSI_MAIN;	487	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	488	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399		490
400	PL_stack_base = AvARRAY(PL_curstack);	491	PL_stack_base = AvARRAY(PL_curstack);
401	PL_stack_sp = PL_stack_base;	492	PL_stack_sp = PL_stack_base;
402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403		494
404	New(50,PL_tmps_stack,128,SV*);	495	New(50,PL_tmps_stack,64,SV*);
405	PL_tmps_floor = -1;	496	PL_tmps_floor = -1;
406	PL_tmps_ix = -1;	497	PL_tmps_ix = -1;
407	PL_tmps_max = 128;	498	PL_tmps_max = 64;
408		499
409	New(54,PL_markstack,32,I32);	500	New(54,PL_markstack,16,I32);
410	PL_markstack_ptr = PL_markstack;	501	PL_markstack_ptr = PL_markstack;
411	PL_markstack_max = PL_markstack + 32;	502	PL_markstack_max = PL_markstack + 16;
412		503
413	#ifdef SET_MARK_OFFSET	504	#ifdef SET_MARK_OFFSET
414	SET_MARK_OFFSET;	505	SET_MARK_OFFSET;
415	#endif	506	#endif
416		507
417	New(54,PL_scopestack,32,I32);	508	New(54,PL_scopestack,16,I32);
418	PL_scopestack_ix = 0;	509	PL_scopestack_ix = 0;
419	PL_scopestack_max = 32;	510	PL_scopestack_max = 16;
420		511
421	New(54,PL_savestack,64,ANY);	512	New(54,PL_savestack,64,ANY);
422	PL_savestack_ix = 0;	513	PL_savestack_ix = 0;
423	PL_savestack_max = 64;	514	PL_savestack_max = 64;
424		515
425	#if !PERL_VERSION_ATLEAST (5,9,0)	516	#if !PERL_VERSION_ATLEAST (5,9,0)
426	New(54,PL_retstack,16,OP*);	517	New(54,PL_retstack,4,OP*);
427	PL_retstack_ix = 0;	518	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	519	PL_retstack_max = 4;
429	#endif	520	#endif
430	}	521	}
		522	#endif
431		523
432	/*	524	/*
433	* destroy the stacks, the callchain etc...	525	* destroy the stacks, the callchain etc...
434	*/	526	*/
435	static void	527	static void
436	coro_destroy_stacks ()	528	coro_destroy_stacks (pTHX)
437	{	529	{
438	if (!IN_DESTRUCT)
439	{
440	/* is this ugly, I ask? */
441	LEAVE_SCOPE (0);
442
443	/* sure it is, but more important: is it correct?? :/ */
444	FREETMPS;
445
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447	}
448
449	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
451		532
452	while (PL_curstackinfo)	533	while (PL_curstackinfo)
453	{	534	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
455		536
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		539
468	Safefree (PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	541	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	542	PL_curstackinfo = p;
471	}	543	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	549	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	550	Safefree (PL_retstack);
479	#endif	551	#endif
480	}	552	}
481		553
482	static void	554	static size_t
483	setup_coro (struct coro *coro)	555	coro_rss (pTHX_ struct coro *coro)
		556	{
		557	size_t rss = sizeof (*coro);
		558
		559	if (coro->mainstack)
		560	{
		561	if (coro->flags & CF_RUNNING)
		562	{
		563	#define VAR(name,type)coro->name = PL_ ## name;
		564	# include "state.h"
		565	#undef VAR
		566	}
		567
		568	rss += sizeof (coro->curstackinfo);
		569	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		570	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		571	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		572	rss += coro->tmps_max * sizeof (SV *);
		573	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		574	rss += coro->scopestack_max * sizeof (I32);
		575	rss += coro->savestack_max * sizeof (ANY);
		576
		577	#if !PERL_VERSION_ATLEAST (5,9,0)
		578	rss += coro->retstack_max * sizeof (OP *);
		579	#endif
		580	}
		581
		582	return rss;
		583	}
		584
		585	/** coroutine stack handling ************************************************/
		586
		587	static void
		588	coro_setup (pTHX_ struct coro *coro)
484	{	589	{
485	/*	590	/*
486	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
487	*/	592	*/
488
489	coro_init_stacks ();	593	coro_init_stacks (aTHX);
490		594
		595	PL_runops = RUNOPS_DEFAULT;
491	PL_curcop = &PL_compiling;	596	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	597	PL_in_eval = EVAL_NULL;
		598	PL_comppad = 0;
493	PL_curpm = 0;	599	PL_curpm = 0;
494	PL_localizing = 0;	600	PL_localizing = 0;
495	PL_dirty = 0;	601	PL_dirty = 0;
496	PL_restartop = 0;	602	PL_restartop = 0;
		603
		604	GvSV (PL_defgv) = NEWSV (0, 0);
		605	GvAV (PL_defgv) = coro->args; coro->args = 0;
		606	GvSV (PL_errgv) = NEWSV (0, 0);
		607	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		608	PL_rs = newSVsv (GvSV (irsgv));
		609	PL_defoutgv = SvREFCNT_inc (stdoutgv);
497		610
498	{	611	{
499	dSP;	612	dSP;
500	LOGOP myop;	613	LOGOP myop;
501		614
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508	Zero (&myop, 1, LOGOP);	615	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	616	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	617	myop.op_flags = OPf_WANT_VOID;
511		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
512	PL_op = (OP *)&myop;	622	PL_op = (OP *)&myop;
513
514	PUSHMARK (SP);
515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516	PUTBACK;
517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	624	SPAGAIN;
519	}	625	}
520		626
521	ENTER; /* necessary e.g. for dounwind */	627	ENTER; /* necessary e.g. for dounwind */
522	}	628	}
523		629
524	static void	630	static void
		631	coro_destroy (pTHX_ struct coro *coro)
		632	{
		633	if (!IN_DESTRUCT)
		634	{
		635	/* restore all saved variables and stuff */
		636	LEAVE_SCOPE (0);
		637	assert (PL_tmps_floor == -1);
		638
		639	/* free all temporaries */
		640	FREETMPS;
		641	assert (PL_tmps_ix == -1);
		642
		643	/* unwind all extra stacks */
		644	POPSTACK_TO (PL_mainstack);
		645
		646	/* unwind main stack */
		647	dounwind (-1);
		648	}
		649
		650	SvREFCNT_dec (GvSV (PL_defgv));
		651	SvREFCNT_dec (GvAV (PL_defgv));
		652	SvREFCNT_dec (GvSV (PL_errgv));
		653	SvREFCNT_dec (PL_defoutgv);
		654	SvREFCNT_dec (PL_rs);
		655	SvREFCNT_dec (GvSV (irsgv));
		656
		657	SvREFCNT_dec (coro->saved_deffh);
		658	//SvREFCNT_dec (coro->throw);
		659
		660	coro_destroy_stacks (aTHX);
		661	}
		662
		663	static void
525	free_coro_mortal ()	664	free_coro_mortal (pTHX)
526	{	665	{
527	if (coro_mortal)	666	if (coro_mortal)
528	{	667	{
529	SvREFCNT_dec (coro_mortal);	668	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	669	coro_mortal = 0;
531	}	670	}
532	}	671	}
533		672
		673	static int
		674	runops_trace (pTHX)
		675	{
		676	COP *oldcop = 0;
		677	int oldcxix = -2;
		678	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		679	coro_cctx *cctx = coro->cctx;
		680
		681	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		682	{
		683	PERL_ASYNC_CHECK ();
		684
		685	if (cctx->flags & CC_TRACE_ALL)
		686	{
		687	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		688	{
		689	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		690	SV **bot, **top;
		691	AV *av = newAV (); /* return values */
		692	SV **cb;
		693	dSP;
		694
		695	GV *gv = CvGV (cx->blk_sub.cv);
		696	SV *fullname = sv_2mortal (newSV (0));
		697	if (isGV (gv))
		698	gv_efullname3 (fullname, gv, 0);
		699
		700	bot = PL_stack_base + cx->blk_oldsp + 1;
		701	top = cx->blk_gimme == G_ARRAY ? SP + 1
		702	: cx->blk_gimme == G_SCALAR ? bot + 1
		703	: bot;
		704
		705	while (bot < top)
		706	av_push (av, SvREFCNT_inc (*bot++));
		707
		708	PL_runops = RUNOPS_DEFAULT;
		709	ENTER;
		710	SAVETMPS;
		711	EXTEND (SP, 3);
		712	PUSHMARK (SP);
		713	PUSHs (&PL_sv_no);
		714	PUSHs (fullname);
		715	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		716	PUTBACK;
		717	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		718	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		719	SPAGAIN;
		720	FREETMPS;
		721	LEAVE;
		722	PL_runops = runops_trace;
		723	}
		724
		725	if (oldcop != PL_curcop)
		726	{
		727	oldcop = PL_curcop;
		728
		729	if (PL_curcop != &PL_compiling)
		730	{
		731	SV **cb;
		732
		733	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		734	{
		735	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		736
		737	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		738	{
		739	runops_proc_t old_runops = PL_runops;
		740	dSP;
		741	GV *gv = CvGV (cx->blk_sub.cv);
		742	SV *fullname = sv_2mortal (newSV (0));
		743
		744	if (isGV (gv))
		745	gv_efullname3 (fullname, gv, 0);
		746
		747	PL_runops = RUNOPS_DEFAULT;
		748	ENTER;
		749	SAVETMPS;
		750	EXTEND (SP, 3);
		751	PUSHMARK (SP);
		752	PUSHs (&PL_sv_yes);
		753	PUSHs (fullname);
		754	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		755	PUTBACK;
		756	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		757	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		758	SPAGAIN;
		759	FREETMPS;
		760	LEAVE;
		761	PL_runops = runops_trace;
		762	}
		763
		764	oldcxix = cxstack_ix;
		765	}
		766
		767	if (cctx->flags & CC_TRACE_LINE)
		768	{
		769	dSP;
		770
		771	PL_runops = RUNOPS_DEFAULT;
		772	ENTER;
		773	SAVETMPS;
		774	EXTEND (SP, 3);
		775	PL_runops = RUNOPS_DEFAULT;
		776	PUSHMARK (SP);
		777	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		778	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		779	PUTBACK;
		780	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		781	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		782	SPAGAIN;
		783	FREETMPS;
		784	LEAVE;
		785	PL_runops = runops_trace;
		786	}
		787	}
		788	}
		789	}
		790	}
		791
		792	TAINT_NOT;
		793	return 0;
		794	}
		795
		796	/* inject a fake call to Coro::State::_cctx_init into the execution */
		797	/* _cctx_init should be careful, as it could be called at almost any time */
		798	/* during execution of a perl program */
534	static void NOINLINE	799	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	800	prepare_cctx (pTHX_ coro_cctx *cctx)
536	{	801	{
537	dSP;	802	dSP;
538	LOGOP myop;	803	LOGOP myop;
539		804
		805	PL_top_env = &PL_start_env;
		806
		807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
		809
540	Zero (&myop, 1, LOGOP);	810	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	811	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	812	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		813
546	PUSHMARK (SP);	814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	818	PUTBACK;
		819	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	821	SPAGAIN;
551	}	822	}
552		823
		824	/*
		825	* this is a _very_ stripped down perl interpreter ;)
		826	*/
553	static void	827	static void
554	coro_run (void *arg)	828	coro_run (void *arg)
555	{	829	{
		830	dTHX;
		831
556	/* coro_run is the alternative epilogue of transfer() */	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	833	UNLOCK;
558		834
		835	/* we now skip the entersub that lead to transfer() */
		836	PL_op = PL_op->op_next;
		837
		838	/* inject a fake subroutine call to cctx_init */
		839	prepare_cctx (aTHX_ (coro_cctx *)arg);
		840
		841	/* somebody or something will hit me for both perl_run and PL_restartop */
		842	PL_restartop = PL_op;
		843	perl_run (PL_curinterp);
		844
559	/*	845	/*
560	* this is a _very_ stripped down perl interpreter ;)	846	* If perl-run returns we assume exit() was being called or the coro
		847	* fell off the end, which seems to be the only valid (non-bug)
		848	* reason for perl_run to return. We try to exit by jumping to the
		849	* bootstrap-time "top" top_env, as we cannot restore the "main"
		850	* coroutine as Coro has no such concept
561	*/	851	*/
562	PL_top_env = &PL_start_env;	852	PL_top_env = main_top_env;
563		853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
564	/* inject call to cctx_init */
565	prepare_cctx ((coro_cctx *)arg);
566
567	/* somebody will hit me for both perl_run and PL_restartop */
568	perl_run (PL_curinterp);
569
570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571	abort ();
572	}	854	}
573		855
574	static coro_cctx *	856	static coro_cctx *
575	cctx_new ()	857	cctx_new ()
576	{	858	{
577	coro_cctx *cctx;	859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
578		862
579	++cctx_count;	863	++cctx_count;
580		864
581	New (0, cctx, 1, coro_cctx);	865	Newz (0, cctx, 1, coro_cctx);
582		866
583	#if HAVE_MMAP	867	#if HAVE_MMAP
584		868
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	870	/* mmap supposedly does allocate-on-write for us */
587	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	871	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		872
589	if (cctx->sptr == (void *)-1)	873	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	874	{
594
595	# if STACKGUARD	875	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	877	# endif
		878	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		879	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		880	cctx->flags |= CC_MAPPED;
		881	}
		882	else
		883	#endif
		884	{
		885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
598		887
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	888	if (!cctx->sptr)
605	{	889	{
606	perror ("FATAL: unable to malloc stack for coroutine");	890	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	891	_exit (EXIT_FAILURE);
608	}	892	}
609		893
610	#endif	894	stack_start = cctx->sptr;
		895	stack_size = cctx->ssize;
		896	}
611		897
612	#if USE_VALGRIND	898	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
613	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615	cctx->ssize + (char *)cctx->sptr
616	);
617	#endif
618
619	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
620		900
621	return cctx;	901	return cctx;
622	}	902	}
623		903
624	static void	904	static void
…		…
627	if (!cctx)	907	if (!cctx)
628	return;	908	return;
629		909
630	--cctx_count;	910	--cctx_count;
631		911
632	#if USE_VALGRIND	912	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	914	#endif
635		915
636	#if HAVE_MMAP	916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
637	munmap (cctx->sptr, cctx->ssize);	918	munmap (cctx->sptr, cctx->ssize);
638	#else	919	else
		920	#endif
639	Safefree (cctx->sptr);	921	Safefree (cctx->sptr);
640	#endif
641		922
642	Safefree (cctx);	923	Safefree (cctx);
643	}	924	}
644		925
645	static coro_cctx *	926	static coro_cctx *
646	cctx_get ()	927	cctx_get (pTHX)
647	{	928	{
648	coro_cctx *cctx;
649
650	if (cctx_first)	929	while (cctx_first)
651	{	930	{
652	cctx = cctx_first;	931	coro_cctx *cctx = cctx_first;
653	cctx_first = cctx->next;	932	cctx_first = cctx->next;
654	--cctx_idle;	933	--cctx_idle;
655	}	934
656	else	935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
657	{	936	return cctx;
658	cctx = cctx_new ();	937
659	PL_op = PL_op->op_next;	938	cctx_destroy (cctx);
660	}	939	}
661		940
662	return cctx;	941	return cctx_new ();
663	}	942	}
664		943
665	static void	944	static void
666	cctx_put (coro_cctx *cctx)	945	cctx_put (coro_cctx *cctx)
667	{	946	{
…		…
670	{	949	{
671	coro_cctx *first = cctx_first;	950	coro_cctx *first = cctx_first;
672	cctx_first = first->next;	951	cctx_first = first->next;
673	--cctx_idle;	952	--cctx_idle;
674		953
675	assert (!first->inuse);
676	cctx_destroy (first);	954	cctx_destroy (first);
677	}	955	}
678		956
679	++cctx_idle;	957	++cctx_idle;
680	cctx->next = cctx_first;	958	cctx->next = cctx_first;
681	cctx_first = cctx;	959	cctx_first = cctx;
682	}	960	}
683		961
684	/* never call directly, always through the coro_state_transfer global variable */	962	/** coroutine switching *****************************************************/
		963
685	static void NOINLINE	964	static void NOINLINE
		965	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		966	{
		967	if (prev != next)
		968	{
		969	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		970	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		971
		972	if (next->flags & CF_RUNNING)
		973	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		974
		975	if (next->flags & CF_DESTROYED)
		976	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		977
		978	if (PL_lex_state != LEX_NOTPARSING)
		979	croak ("Coro::State::transfer called while parsing, but this is not supported");
		980	}
		981	}
		982
		983	/* always use the TRANSFER macro */
		984	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	985	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	986	{
688	dSTACKLEVEL;	987	dSTACKLEVEL;
689		988
690	/* sometimes transfer is only called to set idle_sp */	989	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	990	if (!next)
		991	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	992	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		993	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		994	}
693	else if (prev != next)	995	else if (prev != next)
694	{	996	{
695	coro_cctx *prev__cctx;	997	coro_cctx *prev__cctx;
696		998
697	if (prev->flags & CF_NEW)	999	if (prev->flags & CF_NEW)
698	{	1000	{
699	/* create a new empty context */	1001	/* create a new empty context */
700	Newz (0, prev->cctx, 1, coro_cctx);	1002	Newz (0, prev->cctx, 1, coro_cctx);
701	prev->cctx->inuse = 1;
702	prev->flags &= ~CF_NEW;	1003	prev->flags &= ~CF_NEW;
703	prev->flags |= CF_RUNNING;	1004	prev->flags |= CF_RUNNING;
704	}	1005	}
705		1006
706	/*TODO: must not croak here */
707	if (!prev->flags & CF_RUNNING)
708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710	if (next->flags & CF_RUNNING)
711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713	prev->flags &= ~CF_RUNNING;	1007	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	1008	next->flags |= CF_RUNNING;
715		1009
716	LOCK;	1010	LOCK;
717		1011
718	if (next->mainstack)	1012	if (next->flags & CF_NEW)
719	{	1013	{
720	/* coroutine already started */	1014	/* need to start coroutine */
721	SAVE (prev, flags);	1015	next->flags &= ~CF_NEW;
722	LOAD (next);	1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
723	}	1020	}
724	else	1021	else
725	{	1022	{
726	/* need to start coroutine */	1023	/* coroutine already started */
727	assert (next->flags & CF_NEW);	1024	save_perl (aTHX_ prev);
728	next->flags &= ~CF_NEW;	1025	load_perl (aTHX_ next);
729	/* first get rid of the old state */
730	SAVE (prev, -1);
731	/* setup coroutine call */
732	setup_coro (next);
733	/* need a new stack */
734	assert (!next->stack);
735	}	1026	}
736		1027
737	prev__cctx = prev->cctx;	1028	prev__cctx = prev->cctx;
738		1029
739	/* possibly "free" the cctx */	1030	/* possibly "free" the cctx */
740	if (prev__cctx->idle_sp == STACKLEVEL && 0)	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
741	{	1032	{
742	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
743	assert (PL_top_env == prev__cctx->top_env);	1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
744		1035
745	prev->cctx = 0;	1036	prev->cctx = 0;
746		1037
747	cctx_put (prev__cctx);	1038	cctx_put (prev__cctx);
748	prev__cctx->inuse = 0;
749	}	1039	}
750		1040
		1041	++next->usecount;
		1042
751	if (!next->cctx)	1043	if (!next->cctx)
752	{
753	next->cctx = cctx_get ();	1044	next->cctx = cctx_get (aTHX);
754	assert (!next->cctx->inuse);
755	next->cctx->inuse = 1;
756	}
757		1045
758	if (prev__cctx != next->cctx)	1046	if (prev__cctx != next->cctx)
759	{	1047	{
760	prev__cctx->top_env = PL_top_env;	1048	prev__cctx->top_env = PL_top_env;
761	PL_top_env = next->cctx->top_env;	1049	PL_top_env = next->cctx->top_env;
762	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
763	}	1051	}
764		1052
765	free_coro_mortal ();	1053	free_coro_mortal (aTHX);
766
767	UNLOCK;	1054	UNLOCK;
768	}	1055	}
769	}	1056	}
770		1057
771	struct transfer_args	1058	struct transfer_args
772	{	1059	{
773	struct coro *prev, *next;	1060	struct coro *prev, *next;
774	int flags;
775	};	1061	};
776		1062
777	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1063	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1064	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
778		1065
		1066	/** high level stuff ********************************************************/
		1067
779	static void	1068	static int
780	coro_state_destroy (struct coro *coro)	1069	coro_state_destroy (pTHX_ struct coro *coro)
781	{	1070	{
782	if (coro->refcnt--)	1071	if (coro->flags & CF_DESTROYED)
783	return;	1072	return 0;
		1073
		1074	coro->flags |= CF_DESTROYED;
		1075
		1076	if (coro->flags & CF_READY)
		1077	{
		1078	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1079	/* alternative: look through all ready queues and remove the coro */
		1080	LOCK;
		1081	--coro_nready;
		1082	UNLOCK;
		1083	}
		1084	else
		1085	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
784		1086
785	if (coro->mainstack && coro->mainstack != main_mainstack)	1087	if (coro->mainstack && coro->mainstack != main_mainstack)
786	{	1088	{
787	struct coro temp;	1089	struct coro temp;
788		1090
789	if (coro->flags & CF_RUNNING)	1091	if (coro->flags & CF_RUNNING)
790	croak ("FATAL: tried to destroy currently running coroutine");	1092	croak ("FATAL: tried to destroy currently running coroutine");
791		1093
792	SAVE ((&temp), TRANSFER_SAVE_ALL);	1094	save_perl (aTHX_ &temp);
793	LOAD (coro);	1095	load_perl (aTHX_ coro);
794		1096
795	coro_destroy_stacks ();	1097	coro_destroy (aTHX_ coro);
796		1098
797	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
798		1100
799	coro->mainstack = 0;	1101	coro->mainstack = 0;
800	}	1102	}
801		1103
802	cctx_destroy (coro->cctx);	1104	cctx_destroy (coro->cctx);
803	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
804	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;
805	}	1112	}
806		1113
807	static int	1114	static int
808	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809	{	1116	{
810	struct coro *coro = (struct coro *)mg->mg_ptr;	1117	struct coro *coro = (struct coro *)mg->mg_ptr;
811	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
812		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
813	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
814		1127
815	return 0;	1128	return 0;
816	}	1129	}
817		1130
818	static int	1131	static int
…		…
825	return 0;	1138	return 0;
826	}	1139	}
827		1140
828	static MGVTBL coro_state_vtbl = {	1141	static MGVTBL coro_state_vtbl = {
829	0, 0, 0, 0,	1142	0, 0, 0, 0,
830	coro_state_clear,	1143	coro_state_free,
831	0,	1144	0,
832	#ifdef MGf_DUP	1145	#ifdef MGf_DUP
833	coro_state_dup,	1146	coro_state_dup,
834	#else	1147	#else
835	# define MGf_DUP 0	1148	# define MGf_DUP 0
836	#endif	1149	#endif
837	};	1150	};
838		1151
839	static struct coro *
840	SvSTATE (SV *coro)
841	{
842	HV *stash;
843	MAGIC *mg;
844
845	if (SvROK (coro))
846	coro = SvRV (coro);
847
848	stash = SvSTASH (coro);
849	if (stash != coro_stash && stash != coro_state_stash)
850	{
851	/* very slow, but rare, check */
852	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
853	croak ("Coro::State object required");
854	}
855
856	mg = SvMAGIC (coro);
857	assert (mg->mg_type == PERL_MAGIC_ext);
858	return (struct coro *)mg->mg_ptr;
859	}
860
861	static void	1152	static void
862	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)
863	{	1154	{
864	ta->prev = SvSTATE (prev);	1155	ta->prev = SvSTATE (prev_sv);
865	ta->next = SvSTATE (next);	1156	ta->next = SvSTATE (next_sv);
866	ta->flags = flags;	1157	TRANSFER_CHECK (*ta);
867	}	1158	}
868		1159
869	static void	1160	static void
870	api_transfer (SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
871	{	1162	{
		1163	dTHX;
872	struct transfer_args ta;	1164	struct transfer_args ta;
873		1165
874	prepare_transfer (&ta, prev, next, flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
875	TRANSFER (ta);	1167	TRANSFER (ta);
876	}	1168	}
877		1169
878	/** Coro ********************************************************************/	1170	/** Coro ********************************************************************/
879		1171
880	#define PRIO_MAX 3
881	#define PRIO_HIGH 1
882	#define PRIO_NORMAL 0
883	#define PRIO_LOW -1
884	#define PRIO_IDLE -3
885	#define PRIO_MIN -4
886
887	/* for Coro.pm */
888	static SV *coro_current;
889	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
890	static int coro_nready;
891
892	static void	1172	static void
893	coro_enq (SV *coro_sv)	1173	coro_enq (pTHX_ SV *coro_sv)
894	{	1174	{
895	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;
897	}	1176	}
898		1177
899	static SV *	1178	static SV *
900	coro_deq (int min_prio)	1179	coro_deq (pTHX_ int min_prio)
901	{	1180	{
902	int prio = PRIO_MAX - PRIO_MIN;	1181	int prio = PRIO_MAX - PRIO_MIN;
903		1182
904	min_prio -= PRIO_MIN;	1183	min_prio -= PRIO_MIN;
905	if (min_prio < 0)	1184	if (min_prio < 0)
906	min_prio = 0;	1185	min_prio = 0;
907		1186
908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909	if (AvFILLp (coro_ready [prio]) >= 0)	1188	if (AvFILLp (coro_ready [prio]) >= 0)
910	{
911	coro_nready--;
912	return av_shift (coro_ready [prio]);	1189	return av_shift (coro_ready [prio]);
913	}
914		1190
915	return 0;	1191	return 0;
916	}	1192	}
917		1193
918	static int	1194	static int
919	api_ready (SV *coro_sv)	1195	api_ready (SV *coro_sv)
920	{	1196	{
		1197	dTHX;
921	struct coro *coro;	1198	struct coro *coro;
922		1199
923	if (SvROK (coro_sv))	1200	if (SvROK (coro_sv))
924	coro_sv = SvRV (coro_sv);	1201	coro_sv = SvRV (coro_sv);
925		1202
926	coro = SvSTATE (coro_sv);	1203	coro = SvSTATE (coro_sv);
927		1204
928	if (coro->flags & CF_READY)	1205	if (coro->flags & CF_READY)
929	return 0;	1206	return 0;
930		1207
931	#if 0 /* this is actually harmless */
932	if (coro->flags & CF_RUNNING)
933	croak ("Coro::ready called on currently running coroutine");
934	#endif
935
936	coro->flags |= CF_READY;	1208	coro->flags |= CF_READY;
937		1209
938	LOCK;	1210	LOCK;
939	coro_enq (SvREFCNT_inc (coro_sv));	1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
940	UNLOCK;	1213	UNLOCK;
941		1214
942	return 1;	1215	return 1;
943	}	1216	}
944		1217
945	static int	1218	static int
946	api_is_ready (SV *coro_sv)	1219	api_is_ready (SV *coro_sv)
947	{	1220	{
		1221	dTHX;
948	return !!SvSTATE (coro_sv)->flags & CF_READY;	1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
949	}	1223	}
950		1224
951	static void	1225	static void
952	prepare_schedule (struct transfer_args *ta)	1226	prepare_schedule (pTHX_ struct transfer_args *ta)
953	{	1227	{
954	SV *prev, *next;	1228	SV *prev_sv, *next_sv;
955		1229
956	for (;;)	1230	for (;;)
957	{	1231	{
958	LOCK;	1232	LOCK;
959	next = coro_deq (PRIO_MIN);	1233	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1234
		1235	/* nothing to schedule: call the idle handler */
		1236	if (!next_sv)
		1237	{
		1238	dSP;
		1239	UNLOCK;
		1240
		1241	ENTER;
		1242	SAVETMPS;
		1243
		1244	PUSHMARK (SP);
		1245	PUTBACK;
		1246	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1247
		1248	FREETMPS;
		1249	LEAVE;
		1250	continue;
		1251	}
		1252
		1253	ta->next = SvSTATE (next_sv);
		1254
		1255	/* cannot transfer to destroyed coros, skip and look for next */
		1256	if (ta->next->flags & CF_DESTROYED)
		1257	{
		1258	UNLOCK;
		1259	SvREFCNT_dec (next_sv);
		1260	/* coro_nready is already taken care of by destroy */
		1261	continue;
		1262	}
		1263
		1264	--coro_nready;
960	UNLOCK;	1265	UNLOCK;
961
962	if (next)
963	break;	1266	break;
964
965	{
966	dSP;
967
968	ENTER;
969	SAVETMPS;
970
971	PUSHMARK (SP);
972	PUTBACK;
973	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
974
975	FREETMPS;
976	LEAVE;
977	}	1267	}
978	}
979
980	prev = SvRV (coro_current);
981	SvRV_set (coro_current, next);
982		1268
983	/* free this only after the transfer */	1269	/* free this only after the transfer */
		1270	prev_sv = SvRV (coro_current);
		1271	ta->prev = SvSTATE (prev_sv);
		1272	TRANSFER_CHECK (*ta);
		1273	assert (ta->next->flags & CF_READY);
		1274	ta->next->flags &= ~CF_READY;
		1275	SvRV_set (coro_current, next_sv);
		1276
984	LOCK;	1277	LOCK;
985	free_coro_mortal ();	1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
986	UNLOCK;	1280	UNLOCK;
987	coro_mortal = prev;
988
989	assert (!SvROK(prev));//D
990	assert (!SvROK(next));//D
991
992	ta->prev = SvSTATE (prev);
993	ta->next = SvSTATE (next);
994	ta->flags = TRANSFER_SAVE_ALL;
995
996	assert (ta->flags & CF_READY);
997	ta->next->flags &= ~CF_READY;
998	}	1281	}
999		1282
1000	static void	1283	static void
1001	prepare_cede (struct transfer_args *ta)	1284	prepare_cede (pTHX_ struct transfer_args *ta)
1002	{	1285	{
1003	api_ready (coro_current);	1286	api_ready (coro_current);
1004
1005	prepare_schedule (ta);	1287	prepare_schedule (aTHX_ ta);
		1288	}
		1289
		1290	static int
		1291	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1292	{
		1293	if (coro_nready)
		1294	{
		1295	SV *prev = SvRV (coro_current);
		1296	prepare_schedule (aTHX_ ta);
		1297	api_ready (prev);
		1298	return 1;
		1299	}
		1300	else
		1301	return 0;
1006	}	1302	}
1007		1303
1008	static void	1304	static void
1009	api_schedule (void)	1305	api_schedule (void)
1010	{	1306	{
		1307	dTHX;
1011	struct transfer_args ta;	1308	struct transfer_args ta;
1012		1309
1013	prepare_schedule (&ta);	1310	prepare_schedule (aTHX_ &ta);
1014	TRANSFER (ta);	1311	TRANSFER (ta);
1015	}	1312	}
1016		1313
1017	static void	1314	static int
1018	api_cede (void)	1315	api_cede (void)
1019	{	1316	{
		1317	dTHX;
1020	struct transfer_args ta;	1318	struct transfer_args ta;
1021		1319
1022	prepare_cede (&ta);	1320	prepare_cede (aTHX_ &ta);
		1321
		1322	if (ta.prev != ta.next)
		1323	{
1023	TRANSFER (ta);	1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
1024	}	1329	}
1025		1330
		1331	static int
		1332	api_cede_notself (void)
		1333	{
		1334	dTHX;
		1335	struct transfer_args ta;
		1336
		1337	if (prepare_cede_notself (aTHX_ &ta))
		1338	{
		1339	TRANSFER (ta);
		1340	return 1;
		1341	}
		1342	else
		1343	return 0;
		1344	}
		1345
		1346	static void
		1347	api_trace (SV *coro_sv, int flags)
		1348	{
		1349	dTHX;
		1350	struct coro *coro = SvSTATE (coro_sv);
		1351
		1352	if (flags & CC_TRACE)
		1353	{
		1354	if (!coro->cctx)
		1355	coro->cctx = cctx_new ();
		1356	else if (!(coro->cctx->flags & CC_TRACE))
		1357	croak ("cannot enable tracing on coroutine with custom stack");
		1358
		1359	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1360	}
		1361	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1362	{
		1363	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1364
		1365	if (coro->flags & CF_RUNNING)
		1366	PL_runops = RUNOPS_DEFAULT;
		1367	else
		1368	coro->runops = RUNOPS_DEFAULT;
		1369	}
		1370	}
		1371
1026	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1027		1373
1028	PROTOTYPES: DISABLE	1374	PROTOTYPES: DISABLE
1029		1375
1030	BOOT:	1376	BOOT:
1031	{	1377	{
1032	#ifdef USE_ITHREADS	1378	#ifdef USE_ITHREADS
1033	MUTEX_INIT (&coro_mutex);	1379	MUTEX_INIT (&coro_mutex);
1034	#endif	1380	#endif
1035	BOOT_PAGESIZE;	1381	BOOT_PAGESIZE;
1036		1382
		1383	irsgv = gv_fetchpv ("/" , GV_ADD, SVt_PV);
		1384	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD, SVt_PVIO);
		1385
1037	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1386	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1038		1387
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1040	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1041	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1391	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1042		1392
1043	main_mainstack = PL_mainstack;	1393	main_mainstack = PL_mainstack;
		1394	main_top_env = PL_top_env;
		1395
		1396	while (main_top_env->je_prev)
		1397	main_top_env = main_top_env->je_prev;
1044		1398
1045	coroapi.ver = CORO_API_VERSION;	1399	coroapi.ver = CORO_API_VERSION;
1046	coroapi.transfer = api_transfer;	1400	coroapi.transfer = api_transfer;
1047		1401
1048	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1402	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1055	struct coro *coro;	1409	struct coro *coro;
1056	HV *hv;	1410	HV *hv;
1057	int i;	1411	int i;
1058		1412
1059	Newz (0, coro, 1, struct coro);	1413	Newz (0, coro, 1, struct coro);
1060	coro->args = newAV ();	1414	coro->args = newAV ();
1061	coro->flags = CF_NEW;	1415	coro->flags = CF_NEW;
1062		1416
		1417	if (coro_first) coro_first->prev = coro;
		1418	coro->next = coro_first;
		1419	coro_first = coro;
		1420
1063	hv = newHV ();	1421	coro->hv = hv = newHV ();
1064	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1422	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1065	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1423	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1066		1424
1067	for (i = 1; i < items; i++)	1425	for (i = 1; i < items; i++)
1068	av_push (coro->args, newSVsv (ST (i)));	1426	av_push (coro->args, newSVsv (ST (i)));
1069	}	1427	}
1070	OUTPUT:	1428	OUTPUT:
1071	RETVAL	1429	RETVAL
1072		1430
		1431	# these not obviously related functions are all rolled into the same xs
		1432	# function to increase chances that they all will call transfer with the same
		1433	# stack offset
1073	void	1434	void
1074	_set_stacklevel (...)	1435	_set_stacklevel (...)
1075	ALIAS:	1436	ALIAS:
1076	Coro::State::transfer = 1	1437	Coro::State::transfer = 1
1077	Coro::schedule = 2	1438	Coro::schedule = 2
1078	Coro::cede = 3	1439	Coro::cede = 3
1079	Coro::Cont::yield = 4	1440	Coro::cede_notself = 4
1080	CODE:	1441	CODE:
1081	{	1442	{
1082	struct transfer_args ta;	1443	struct transfer_args ta;
1083		1444
1084	switch (ix)	1445	switch (ix)
1085	{	1446	{
1086	case 0:	1447	case 0:
1087	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1448	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1088	ta.next = 0;	1449	ta.next = 0;
1089	ta.flags = TRANSFER_SET_STACKLEVEL;
1090	break;	1450	break;
1091		1451
1092	case 1:	1452	case 1:
1093	if (items != 3)	1453	if (items != 2)
1094	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1454	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1095		1455
1096	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1456	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1097	break;	1457	break;
1098		1458
1099	case 2:	1459	case 2:
1100	prepare_schedule (&ta);	1460	prepare_schedule (aTHX_ &ta);
1101	break;	1461	break;
1102		1462
1103	case 3:	1463	case 3:
1104	prepare_cede (&ta);	1464	prepare_cede (aTHX_ &ta);
1105	break;	1465	break;
1106		1466
1107	case 4:	1467	case 4:
1108	{	1468	if (!prepare_cede_notself (aTHX_ &ta))
1109	SV *yieldstack;	1469	XSRETURN_EMPTY;
1110	SV *sv;
1111	AV *defav = GvAV (PL_defgv);
1112		1470
1113	yieldstack = *hv_fetch (
1114	(HV *)SvRV (coro_current),
1115	"yieldstack", sizeof ("yieldstack") - 1,
1116	0
1117	);
1118
1119	/* set up @_ -- ugly */
1120	av_clear (defav);
1121	av_fill (defav, items - 1);
1122	while (items--)
1123	av_store (defav, items, SvREFCNT_inc (ST(items)));
1124
1125	sv = av_pop ((AV *)SvRV (yieldstack));
1126	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1127	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1128	ta.flags = 0;
1129	SvREFCNT_dec (sv);
1130	}
1131	break;	1471	break;
1132
1133	}	1472	}
1134		1473
		1474	BARRIER;
1135	TRANSFER (ta);	1475	TRANSFER (ta);
1136	}
1137		1476
1138	void	1477	if (GIMME_V != G_VOID && ta.next != ta.prev)
1139	_clone_state_from (SV *dst, SV *src)	1478	XSRETURN_YES;
		1479	}
		1480
		1481	bool
		1482	_destroy (SV *coro_sv)
1140	CODE:	1483	CODE:
1141	{	1484	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1142	struct coro *coro_src = SvSTATE (src);	1485	OUTPUT:
1143		1486	RETVAL
1144	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1145
1146	++coro_src->refcnt;
1147	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1148	}
1149		1487
1150	void	1488	void
1151	_exit (code)	1489	_exit (code)
1152	int code	1490	int code
1153	PROTOTYPE: $	1491	PROTOTYPE: $
1154	CODE:	1492	CODE:
1155	_exit (code);	1493	_exit (code);
1156		1494
1157	int	1495	int
		1496	cctx_stacksize (int new_stacksize = 0)
		1497	CODE:
		1498	RETVAL = coro_stacksize;
		1499	if (new_stacksize)
		1500	coro_stacksize = new_stacksize;
		1501	OUTPUT:
		1502	RETVAL
		1503
		1504	int
1158	cctx_count ()	1505	cctx_count ()
1159	CODE:	1506	CODE:
1160	RETVAL = cctx_count;	1507	RETVAL = cctx_count;
1161	OUTPUT:	1508	OUTPUT:
1162	RETVAL	1509	RETVAL
…		…
1166	CODE:	1513	CODE:
1167	RETVAL = cctx_idle;	1514	RETVAL = cctx_idle;
1168	OUTPUT:	1515	OUTPUT:
1169	RETVAL	1516	RETVAL
1170		1517
		1518	void
		1519	list ()
		1520	PPCODE:
		1521	{
		1522	struct coro *coro;
		1523	for (coro = coro_first; coro; coro = coro->next)
		1524	if (coro->hv)
		1525	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1526	}
		1527
		1528	void
		1529	call (Coro::State coro, SV *coderef)
		1530	ALIAS:
		1531	eval = 1
		1532	CODE:
		1533	{
		1534	if (coro->mainstack)
		1535	{
		1536	struct coro temp;
		1537	Zero (&temp, 1, struct coro);
		1538
		1539	if (!(coro->flags & CF_RUNNING))
		1540	{
		1541	save_perl (aTHX_ &temp);
		1542	load_perl (aTHX_ coro);
		1543	}
		1544
		1545	{
		1546	dSP;
		1547	ENTER;
		1548	SAVETMPS;
		1549	PUSHMARK (SP);
		1550	PUTBACK;
		1551	if (ix)
		1552	eval_sv (coderef, 0);
		1553	else
		1554	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1555	SPAGAIN;
		1556	FREETMPS;
		1557	LEAVE;
		1558	PUTBACK;
		1559	}
		1560
		1561	if (!(coro->flags & CF_RUNNING))
		1562	{
		1563	save_perl (aTHX_ coro);
		1564	load_perl (aTHX_ &temp);
		1565	}
		1566	}
		1567	}
		1568
		1569	SV *
		1570	is_ready (Coro::State coro)
		1571	PROTOTYPE: $
		1572	ALIAS:
		1573	is_ready = CF_READY
		1574	is_running = CF_RUNNING
		1575	is_new = CF_NEW
		1576	is_destroyed = CF_DESTROYED
		1577	CODE:
		1578	RETVAL = boolSV (coro->flags & ix);
		1579	OUTPUT:
		1580	RETVAL
		1581
		1582	void
		1583	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1584
		1585	SV *
		1586	has_stack (Coro::State coro)
		1587	PROTOTYPE: $
		1588	CODE:
		1589	RETVAL = boolSV (!!coro->cctx);
		1590	OUTPUT:
		1591	RETVAL
		1592
		1593	int
		1594	is_traced (Coro::State coro)
		1595	PROTOTYPE: $
		1596	CODE:
		1597	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1598	OUTPUT:
		1599	RETVAL
		1600
		1601	IV
		1602	rss (Coro::State coro)
		1603	PROTOTYPE: $
		1604	ALIAS:
		1605	usecount = 1
		1606	CODE:
		1607	switch (ix)
		1608	{
		1609	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1610	case 1: RETVAL = coro->usecount; break;
		1611	}
		1612	OUTPUT:
		1613	RETVAL
		1614
		1615
1171	MODULE = Coro::State PACKAGE = Coro	1616	MODULE = Coro::State PACKAGE = Coro
1172		1617
1173	BOOT:	1618	BOOT:
1174	{	1619	{
1175	int i;	1620	int i;
		1621
		1622	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1623	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1624	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1625
		1626	coro_current = get_sv ("Coro::current", FALSE);
		1627	SvREADONLY_on (coro_current);
1176		1628
1177	coro_stash = gv_stashpv ("Coro", TRUE);	1629	coro_stash = gv_stashpv ("Coro", TRUE);
1178		1630
1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1631	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1632	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1633	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1634	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1635	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1636	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185		1637
1186	coro_current = get_sv ("Coro::current", FALSE);
1187	SvREADONLY_on (coro_current);
1188
1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1638	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190	coro_ready[i] = newAV ();	1639	coro_ready[i] = newAV ();
1191		1640
1192	{	1641	{
1193	SV *sv = perl_get_sv("Coro::API", 1);	1642	SV *sv = perl_get_sv("Coro::API", 1);
1194		1643
1195	coroapi.schedule = api_schedule;	1644	coroapi.schedule = api_schedule;
1196	coroapi.cede = api_cede;	1645	coroapi.cede = api_cede;
		1646	coroapi.cede_notself = api_cede_notself;
1197	coroapi.ready = api_ready;	1647	coroapi.ready = api_ready;
1198	coroapi.is_ready = api_is_ready;	1648	coroapi.is_ready = api_is_ready;
1199	coroapi.nready = &coro_nready;	1649	coroapi.nready = &coro_nready;
1200	coroapi.current = coro_current;	1650	coroapi.current = coro_current;
1201		1651
1202	GCoroAPI = &coroapi;	1652	GCoroAPI = &coroapi;
1203	sv_setiv (sv, (IV)&coroapi);	1653	sv_setiv (sv, (IV)&coroapi);
1204	SvREADONLY_on (sv);	1654	SvREADONLY_on (sv);
1205	}	1655	}
1206	}	1656	}
		1657
		1658	void
		1659	_set_current (SV *current)
		1660	PROTOTYPE: $
		1661	CODE:
		1662	SvREFCNT_dec (SvRV (coro_current));
		1663	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1207		1664
1208	int	1665	int
1209	prio (Coro::State coro, int newprio = 0)	1666	prio (Coro::State coro, int newprio = 0)
1210	ALIAS:	1667	ALIAS:
1211	nice = 1	1668	nice = 1
…		…
1214	RETVAL = coro->prio;	1671	RETVAL = coro->prio;
1215		1672
1216	if (items > 1)	1673	if (items > 1)
1217	{	1674	{
1218	if (ix)	1675	if (ix)
1219	newprio += coro->prio;	1676	newprio = coro->prio - newprio;
1220		1677
1221	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1678	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1222	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1679	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1223		1680
1224	coro->prio = newprio;	1681	coro->prio = newprio;
1225	}	1682	}
1226	}	1683	}
		1684	OUTPUT:
		1685	RETVAL
1227		1686
1228	SV *	1687	SV *
1229	ready (SV *self)	1688	ready (SV *self)
1230	PROTOTYPE: $	1689	PROTOTYPE: $
1231	CODE:	1690	CODE:
1232	RETVAL = boolSV (api_ready (self));	1691	RETVAL = boolSV (api_ready (self));
1233	OUTPUT:	1692	OUTPUT:
1234	RETVAL	1693	RETVAL
1235		1694
1236	SV *
1237	is_ready (SV *self)
1238	PROTOTYPE: $
1239	CODE:
1240	RETVAL = boolSV (api_is_ready (self));
1241	OUTPUT:
1242	RETVAL
1243
1244	int	1695	int
1245	nready (...)	1696	nready (...)
1246	PROTOTYPE:	1697	PROTOTYPE:
1247	CODE:	1698	CODE:
1248	RETVAL = coro_nready;	1699	RETVAL = coro_nready;
1249	OUTPUT:	1700	OUTPUT:
1250	RETVAL	1701	RETVAL
1251		1702
		1703	# for async_pool speedup
1252	void	1704	void
1253	_set_current (SV *current)	1705	_pool_1 (SV *cb)
1254	PROTOTYPE: $
1255	CODE:	1706	CODE:
1256	SvREFCNT_dec (SvRV (coro_current));	1707	{
1257	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1708	struct coro *coro = SvSTATE (coro_current);
		1709	HV *hv = (HV *)SvRV (coro_current);
		1710	AV *defav = GvAV (PL_defgv);
		1711	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1712	AV *invoke_av;
		1713	int i, len;
		1714
		1715	if (!invoke)
		1716	croak ("\3terminate\2\n");
		1717
		1718	SvREFCNT_dec (coro->saved_deffh);
		1719	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1720
		1721	hv_store (hv, "desc", sizeof ("desc") - 1,
		1722	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1723
		1724	invoke_av = (AV *)SvRV (invoke);
		1725	len = av_len (invoke_av);
		1726
		1727	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1728
		1729	if (len > 0)
		1730	{
		1731	av_fill (defav, len - 1);
		1732	for (i = 0; i < len; ++i)
		1733	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1734	}
		1735
		1736	SvREFCNT_dec (invoke);
		1737	}
		1738
		1739	void
		1740	_pool_2 (SV *cb)
		1741	CODE:
		1742	{
		1743	struct coro *coro = SvSTATE (coro_current);
		1744
		1745	sv_setsv (cb, &PL_sv_undef);
		1746
		1747	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1748	coro->saved_deffh = 0;
		1749
		1750	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1751	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1752	croak ("\3terminate\2\n");
		1753
		1754	av_clear (GvAV (PL_defgv));
		1755	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1756	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1757
		1758	coro->prio = 0;
		1759
		1760	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1761	api_trace (coro_current, 0);
		1762
		1763	av_push (av_async_pool, newSVsv (coro_current));
		1764	}
		1765
1258		1766
1259	MODULE = Coro::State PACKAGE = Coro::AIO	1767	MODULE = Coro::State PACKAGE = Coro::AIO
1260		1768
1261	SV *	1769	SV *
1262	_get_state ()	1770	_get_state ()
1263	CODE:	1771	CODE:
1264	{	1772	{
1265	struct {	1773	struct io_state *data;
1266	int errorno;
1267	int laststype;
1268	int laststatval;
1269	Stat_t statcache;
1270	} data;
1271		1774
		1775	RETVAL = newSV (sizeof (struct io_state));
		1776	data = (struct io_state *)SvPVX (RETVAL);
		1777	SvCUR_set (RETVAL, sizeof (struct io_state));
		1778	SvPOK_only (RETVAL);
		1779
1272	data.errorno = errno;	1780	data->errorno = errno;
1273	data.laststype = PL_laststype;	1781	data->laststype = PL_laststype;
1274	data.laststatval = PL_laststatval;	1782	data->laststatval = PL_laststatval;
1275	data.statcache = PL_statcache;	1783	data->statcache = PL_statcache;
1276
1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
1278	}	1784	}
1279	OUTPUT:	1785	OUTPUT:
1280	RETVAL	1786	RETVAL
1281		1787
1282	void	1788	void
1283	_set_state (char *data_)	1789	_set_state (char *data_)
1284	PROTOTYPE: $	1790	PROTOTYPE: $
1285	CODE:	1791	CODE:
1286	{	1792	{
1287	struct {	1793	struct io_state *data = (void *)data_;
1288	int errorno;
1289	int laststype;
1290	int laststatval;
1291	Stat_t statcache;
1292	} *data = (void *)data_;
1293		1794
1294	errno = data->errorno;	1795	errno = data->errorno;
1295	PL_laststype = data->laststype;	1796	PL_laststype = data->laststype;
1296	PL_laststatval = data->laststatval;	1797	PL_laststatval = data->laststatval;
1297	PL_statcache = data->statcache;	1798	PL_statcache = data->statcache;
1298	}	1799	}
		1800

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