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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.116 by root, Fri Dec 1 14:01:43 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, /* coroutine is running */	178	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY, /* coroutine is ready */	179	CF_READY = 0x0002, /* coroutine is ready */
		180	CF_NEW = 0x0004, /* has never been switched to */
		181	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
137	};	182	};
138		183
139	/* this is a structure representing a perl-level coroutine */	184	/* this is a structure representing a perl-level coroutine */
140	struct coro {	185	struct coro {
141	/* the c coroutine allocated to this perl coroutine, if any */	186	/* the c coroutine allocated to this perl coroutine, if any */
142	coro_cctx *cctx;	187	coro_cctx *cctx;
143		188
144	/* data associated with this coroutine (initial args) */	189	/* data associated with this coroutine (initial args) */
145	AV *args;	190	AV *args;
146	int refcnt;	191	int refcnt;
147	int flags;	192	int flags; /* CF_ flags */
148		193
149	/* optionally saved, might be zero */	194	/* optionally saved, might be zero */
150	AV *defav;	195	AV *defav; /* @_ */
151	SV *defsv;	196	SV *defsv; /* $_ */
152	SV *errsv;	197	SV *errsv; /* $@ */
		198	SV *deffh; /* default filehandle */
		199	SV *irssv; /* $/ */
		200	SV *irssv_sv; /* real $/ cache */
153		201
154	#define VAR(name,type) type name;	202	#define VAR(name,type) type name;
155	# include "state.h"	203	# include "state.h"
156	#undef VAR	204	#undef VAR
157		205
		206	/* statistics */
		207	int usecount; /* number of transfers to this coro */
		208
158	/* coro process data */	209	/* coro process data */
159	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 */
160	};	219	};
161		220
162	typedef struct coro *Coro__State;	221	typedef struct coro *Coro__State;
163	typedef struct coro *Coro__State_or_hashref;	222	typedef struct coro *Coro__State_or_hashref;
164		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
165	static AV *	241	static AV *
166	coro_clone_padlist (CV *cv)	242	coro_clone_padlist (pTHX_ CV *cv)
167	{	243	{
168	AV *padlist = CvPADLIST (cv);	244	AV *padlist = CvPADLIST (cv);
169	AV *newpadlist, *newpad;	245	AV *newpadlist, *newpad;
170		246
171	newpadlist = newAV ();	247	newpadlist = newAV ();
…		…
183		259
184	return newpadlist;	260	return newpadlist;
185	}	261	}
186		262
187	static void	263	static void
188	free_padlist (AV *padlist)	264	free_padlist (pTHX_ AV *padlist)
189	{	265	{
190	/* may be during global destruction */	266	/* may be during global destruction */
191	if (SvREFCNT (padlist))	267	if (SvREFCNT (padlist))
192	{	268	{
193	I32 i = AvFILLp (padlist);	269	I32 i = AvFILLp (padlist);
…		…
214	AV *padlist;	290	AV *padlist;
215	AV *av = (AV *)mg->mg_obj;	291	AV *av = (AV *)mg->mg_obj;
216		292
217	/* casting is fun. */	293	/* casting is fun. */
218	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	294	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
219	free_padlist (padlist);	295	free_padlist (aTHX_ padlist);
220		296
221	SvREFCNT_dec (av);	297	SvREFCNT_dec (av);
222		298
223	return 0;	299	return 0;
224	}	300	}
…		…
232	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	308	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
233	? SvMAGIC (cv) \	309	? SvMAGIC (cv) \
234	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	310	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
235	: 0	311	: 0
236		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
237	/* the next two functions merely cache the padlists */	339	/* the next two functions merely cache the padlists */
238	static void	340	static void
239	get_padlist (CV *cv)	341	get_padlist (pTHX_ CV *cv)
240	{	342	{
241	MAGIC *mg = CORO_MAGIC (cv);	343	MAGIC *mg = CORO_MAGIC (cv);
242	AV *av;	344	AV *av;
243		345
244	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	346	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
245	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	347	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
246	else	348	else
247	{	349	{
248	#if 0	350	#if CORO_PREFER_PERL_FUNCTIONS
249	/* this is probably cleaner, but also slower? */	351	/* this is probably cleaner, but also slower? */
250	CV *cp = Perl_cv_clone (cv);	352	CV *cp = Perl_cv_clone (cv);
251	CvPADLIST (cv) = CvPADLIST (cp);	353	CvPADLIST (cv) = CvPADLIST (cp);
252	CvPADLIST (cp) = 0;	354	CvPADLIST (cp) = 0;
253	SvREFCNT_dec (cp);	355	SvREFCNT_dec (cp);
254	#else	356	#else
255	CvPADLIST (cv) = coro_clone_padlist (cv);	357	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
256	#endif	358	#endif
257	}	359	}
258	}	360	}
259		361
260	static void	362	static void
261	put_padlist (CV *cv)	363	put_padlist (pTHX_ CV *cv)
262	{	364	{
263	MAGIC *mg = CORO_MAGIC (cv);	365	MAGIC *mg = CORO_MAGIC (cv);
264	AV *av;	366	AV *av;
265		367
266	if (!mg)	368	if (!mg)
…		…
277	av_extend (av, AvMAX (av) + 1);	379	av_extend (av, AvMAX (av) + 1);
278		380
279	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	381	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280	}	382	}
281		383
282	#define SB do {	384	/** load & save, init *******************************************************/
283	#define SE } while (0)
284		385
285	#define LOAD(state) load_state((state));
286	#define SAVE(state,flags) save_state((state),(flags));
287
288	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
289
290	static void	386	static void
291	load_state(Coro__State c)	387	load_perl (pTHX_ Coro__State c)
292	{	388	{
293	#define VAR(name,type) PL_ ## name = c->name;	389	#define VAR(name,type) PL_ ## name = c->name;
294	# include "state.h"	390	# include "state.h"
295	#undef VAR	391	#undef VAR
296		392
297	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	393	GvSV (PL_defgv) = c->defsv;
298	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	394	GvAV (PL_defgv) = c->defav;
299	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	395	GvSV (PL_errgv) = c->errsv;
		396	GvSV (irsgv) = c->irssv_sv;
300		397
301	{	398	{
302	dSP;	399	dSP;
303	CV *cv;	400	CV *cv;
304		401
305	/* now do the ugly restore mess */	402	/* now do the ugly restore mess */
306	while ((cv = (CV *)POPs))	403	while ((cv = (CV *)POPs))
307	{	404	{
308	put_padlist (cv); /* mark this padlist as available */	405	put_padlist (aTHX_ cv); /* mark this padlist as available */
309	CvDEPTH (cv) = PTR2IV (POPs);	406	CvDEPTH (cv) = PTR2IV (POPs);
310	CvPADLIST (cv) = (AV *)POPs;	407	CvPADLIST (cv) = (AV *)POPs;
311	}	408	}
312		409
313	PUTBACK;	410	PUTBACK;
314	}	411	}
315	}	412	}
316		413
317	static void	414	static void
318	save_state(Coro__State c, int flags)	415	save_perl (pTHX_ Coro__State c)
319	{	416	{
320	{	417	{
321	dSP;	418	dSP;
322	I32 cxix = cxstack_ix;	419	I32 cxix = cxstack_ix;
323	PERL_CONTEXT *ccstk = cxstack;	420	PERL_CONTEXT *ccstk = cxstack;
…		…
326	/*	423	/*
327	* 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
328	* (and reinitialize) all cv's in the whole callchain :(	425	* (and reinitialize) all cv's in the whole callchain :(
329	*/	426	*/
330		427
331	PUSHs (Nullsv);	428	XPUSHs (Nullsv);
332	/* this loop was inspired by pp_caller */	429	/* this loop was inspired by pp_caller */
333	for (;;)	430	for (;;)
334	{	431	{
335	while (cxix >= 0)	432	while (cxix >= 0)
336	{	433	{
337	PERL_CONTEXT *cx = &ccstk[cxix--];	434	PERL_CONTEXT *cx = &ccstk[cxix--];
338		435
339	if (CxTYPE(cx) == CXt_SUB)	436	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
340	{	437	{
341	CV *cv = cx->blk_sub.cv;	438	CV *cv = cx->blk_sub.cv;
342		439
343	if (CvDEPTH (cv))	440	if (CvDEPTH (cv))
344	{	441	{
345	EXTEND (SP, 3);	442	EXTEND (SP, 3);
346
347	PUSHs ((SV *)CvPADLIST(cv));	443	PUSHs ((SV *)CvPADLIST (cv));
348	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	444	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
349	PUSHs ((SV *)cv);	445	PUSHs ((SV *)cv);
350		446
351	CvDEPTH (cv) = 0;	447	CvDEPTH (cv) = 0;
352	get_padlist (cv);	448	get_padlist (aTHX_ cv);
353	}	449	}
354	}	450	}
355	#ifdef CXt_FORMAT
356	else if (CxTYPE(cx) == CXt_FORMAT)
357	{
358	/* I never used formats, so how should I know how these are implemented? */
359	/* my bold guess is as a simple, plain sub... */
360	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
361	}
362	#endif
363	}	451	}
364		452
365	if (top_si->si_type == PERLSI_MAIN)	453	if (top_si->si_type == PERLSI_MAIN)
366	break;	454	break;
367		455
368	top_si = top_si->si_prev;	456	top_si = top_si->si_prev;
369	ccstk = top_si->si_cxstack;	457	ccstk = top_si->si_cxstack;
370	cxix = top_si->si_cxix;	458	cxix = top_si->si_cxix;
371	}	459	}
372		460
373	PUTBACK;	461	PUTBACK;
374	}	462	}
375		463
376	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	464	c->defav = GvAV (PL_defgv);
377	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	465	c->defsv = DEFSV;
378	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	466	c->errsv = ERRSV;
		467	c->irssv_sv = GvSV (irsgv);
379		468
380	#define VAR(name,type)c->name = PL_ ## name;	469	#define VAR(name,type)c->name = PL_ ## name;
381	# include "state.h"	470	# include "state.h"
382	#undef VAR	471	#undef VAR
383	}	472	}
…		…
386	* allocate various perl stacks. This is an exact copy	475	* allocate various perl stacks. This is an exact copy
387	* of perl.c:init_stacks, except that it uses less memory	476	* of perl.c:init_stacks, except that it uses less memory
388	* on the (sometimes correct) assumption that coroutines do	477	* on the (sometimes correct) assumption that coroutines do
389	* not usually need a lot of stackspace.	478	* not usually need a lot of stackspace.
390	*/	479	*/
		480	#if CORO_PREFER_PERL_FUNCTIONS
		481	# define coro_init_stacks init_stacks
		482	#else
391	static void	483	static void
392	coro_init_stacks ()	484	coro_init_stacks (pTHX)
393	{	485	{
394	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	486	PL_curstackinfo = new_stackinfo(64, 6);
395	PL_curstackinfo->si_type = PERLSI_MAIN;	487	PL_curstackinfo->si_type = PERLSI_MAIN;
396	PL_curstack = PL_curstackinfo->si_stack;	488	PL_curstack = PL_curstackinfo->si_stack;
397	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
398		490
399	PL_stack_base = AvARRAY(PL_curstack);	491	PL_stack_base = AvARRAY(PL_curstack);
400	PL_stack_sp = PL_stack_base;	492	PL_stack_sp = PL_stack_base;
401	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
402		494
403	New(50,PL_tmps_stack,128,SV*);	495	New(50,PL_tmps_stack,64,SV*);
404	PL_tmps_floor = -1;	496	PL_tmps_floor = -1;
405	PL_tmps_ix = -1;	497	PL_tmps_ix = -1;
406	PL_tmps_max = 128;	498	PL_tmps_max = 64;
407		499
408	New(54,PL_markstack,32,I32);	500	New(54,PL_markstack,16,I32);
409	PL_markstack_ptr = PL_markstack;	501	PL_markstack_ptr = PL_markstack;
410	PL_markstack_max = PL_markstack + 32;	502	PL_markstack_max = PL_markstack + 16;
411		503
412	#ifdef SET_MARK_OFFSET	504	#ifdef SET_MARK_OFFSET
413	SET_MARK_OFFSET;	505	SET_MARK_OFFSET;
414	#endif	506	#endif
415		507
416	New(54,PL_scopestack,32,I32);	508	New(54,PL_scopestack,16,I32);
417	PL_scopestack_ix = 0;	509	PL_scopestack_ix = 0;
418	PL_scopestack_max = 32;	510	PL_scopestack_max = 16;
419		511
420	New(54,PL_savestack,64,ANY);	512	New(54,PL_savestack,64,ANY);
421	PL_savestack_ix = 0;	513	PL_savestack_ix = 0;
422	PL_savestack_max = 64;	514	PL_savestack_max = 64;
423		515
424	#if !PERL_VERSION_ATLEAST (5,9,0)	516	#if !PERL_VERSION_ATLEAST (5,9,0)
425	New(54,PL_retstack,16,OP*);	517	New(54,PL_retstack,4,OP*);
426	PL_retstack_ix = 0;	518	PL_retstack_ix = 0;
427	PL_retstack_max = 16;	519	PL_retstack_max = 4;
428	#endif	520	#endif
429	}	521	}
		522	#endif
430		523
431	/*	524	/*
432	* destroy the stacks, the callchain etc...	525	* destroy the stacks, the callchain etc...
433	*/	526	*/
434	static void	527	static void
435	coro_destroy_stacks ()	528	coro_destroy_stacks (pTHX)
436	{	529	{
437	if (!IN_DESTRUCT)
438	{
439	/* is this ugly, I ask? */
440	LEAVE_SCOPE (0);
441
442	/* sure it is, but more important: is it correct?? :/ */
443	FREETMPS;
444
445	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
446	}
447
448	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
449	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
450		532
451	while (PL_curstackinfo)	533	while (PL_curstackinfo)
452	{	534	{
453	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
454		536
455	{ /*D*//*remove*/
456	dSP;
457	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
458	PUTBACK; /* possibly superfluous */
459	}
460
461	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
462	{
463	dounwind (-1);/*D*//*remove*/
464	SvREFCNT_dec (PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
465	}
466		539
467	Safefree (PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
468	Safefree (PL_curstackinfo);	541	Safefree (PL_curstackinfo);
469	PL_curstackinfo = p;	542	PL_curstackinfo = p;
470	}	543	}
…		…
476	#if !PERL_VERSION_ATLEAST (5,9,0)	549	#if !PERL_VERSION_ATLEAST (5,9,0)
477	Safefree (PL_retstack);	550	Safefree (PL_retstack);
478	#endif	551	#endif
479	}	552	}
480		553
481	static void	554	static size_t
482	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)
483	{	589	{
484	/*	590	/*
485	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
486	*/	592	*/
487
488	coro_init_stacks ();	593	coro_init_stacks (aTHX);
489		594
		595	PL_runops = RUNOPS_DEFAULT;
		596	PL_curcop = &PL_compiling;
		597	PL_in_eval = EVAL_NULL;
490	PL_curcop = 0;	598	PL_comppad = 0;
491	PL_in_eval = 0;
492	PL_curpm = 0;	599	PL_curpm = 0;
		600	PL_localizing = 0;
		601	PL_dirty = 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);
493		610
494	{	611	{
495	dSP;	612	dSP;
496	LOGOP myop;	613	LOGOP myop;
497		614
498	/* I have no idea why this is needed, but it is */
499	PUSHMARK (SP);
500
501	SvREFCNT_dec (GvAV (PL_defgv));
502	GvAV (PL_defgv) = coro->args; coro->args = 0;
503
504	Zero (&myop, 1, LOGOP);	615	Zero (&myop, 1, LOGOP);
505	myop.op_next = Nullop;	616	myop.op_next = Nullop;
506	myop.op_flags = OPf_WANT_VOID;	617	myop.op_flags = OPf_WANT_VOID;
507		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
508	PL_op = (OP *)&myop;	622	PL_op = (OP *)&myop;
509
510	PUSHMARK (SP);
511	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
512	PUTBACK;
513	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
514	SPAGAIN;	624	SPAGAIN;
515
516	ENTER; /* necessary e.g. for dounwind */
517	}	625	}
518	}
519		626
		627	ENTER; /* necessary e.g. for dounwind */
		628	}
		629
520	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
521	free_coro_mortal ()	664	free_coro_mortal (pTHX)
522	{	665	{
523	if (coro_mortal)	666	if (coro_mortal)
524	{	667	{
525	SvREFCNT_dec (coro_mortal);	668	SvREFCNT_dec (coro_mortal);
526	coro_mortal = 0;	669	coro_mortal = 0;
527	}	670	}
528	}	671	}
529		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 */
530	static void NOINLINE	799	static void NOINLINE
531	prepare_cctx (coro_cctx *cctx)	800	prepare_cctx (pTHX_ coro_cctx *cctx)
532	{	801	{
533	dSP;	802	dSP;
534	LOGOP myop;	803	LOGOP myop;
535		804
		805	PL_top_env = &PL_start_env;
		806
		807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
		809
536	Zero (&myop, 1, LOGOP);	810	Zero (&myop, 1, LOGOP);
537	myop.op_next = PL_op;	811	myop.op_next = PL_op;
538	myop.op_flags = OPf_WANT_VOID;	812	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
539
540	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
541		813
542	PUSHMARK (SP);	814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
543	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
544	PUTBACK;	818	PUTBACK;
		819	PL_op = (OP *)&myop;
545	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
546	SPAGAIN;	821	SPAGAIN;
547	}	822	}
548		823
		824	/*
		825	* this is a _very_ stripped down perl interpreter ;)
		826	*/
549	static void	827	static void
550	coro_run (void *arg)	828	coro_run (void *arg)
551	{	829	{
		830	dTHX;
		831
552	/* coro_run is the alternative epilogue of transfer() */	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
553	UNLOCK;	833	UNLOCK;
554		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
555	/*	845	/*
556	* 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
557	*/	851	*/
558	PL_top_env = &PL_start_env;	852	PL_top_env = main_top_env;
559		853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
560	/* inject call to cctx_init */
561	prepare_cctx ((coro_cctx *)arg);
562
563	/* somebody will hit me for both perl_run and PL_restartop */
564	perl_run (PL_curinterp);
565
566	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
567	abort ();
568	}	854	}
569		855
570	static coro_cctx *	856	static coro_cctx *
571	cctx_new ()	857	cctx_new ()
572	{	858	{
573	coro_cctx *cctx;	859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
574		862
575	++cctx_count;	863	++cctx_count;
576		864
577	New (0, cctx, 1, coro_cctx);	865	Newz (0, cctx, 1, coro_cctx);
578		866
579	#if HAVE_MMAP	867	#if HAVE_MMAP
580		868
581	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
582	/* mmap suppsedly does allocate-on-write for us */	870	/* mmap supposedly does allocate-on-write for us */
583	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);
584		872
585	if (cctx->sptr == (void *)-1)	873	if (cctx->sptr != (void *)-1)
586	{
587	perror ("FATAL: unable to mmap stack for coroutine");
588	_exit (EXIT_FAILURE);
589	}	874	{
590
591	# if STACKGUARD	875	# if CORO_STACKGUARD
592	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
593	# 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);
594		887
595	#else
596
597	cctx->ssize = STACKSIZE * (long)sizeof (long);
598	New (0, cctx->sptr, STACKSIZE, long);
599
600	if (!cctx->sptr)	888	if (!cctx->sptr)
601	{	889	{
602	perror ("FATAL: unable to malloc stack for coroutine");	890	perror ("FATAL: unable to allocate stack for coroutine");
603	_exit (EXIT_FAILURE);	891	_exit (EXIT_FAILURE);
604	}	892	}
605		893
606	#endif	894	stack_start = cctx->sptr;
		895	stack_size = cctx->ssize;
		896	}
607		897
608	#if USE_VALGRIND	898	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
609	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
610	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
611	cctx->ssize + (char *)cctx->sptr
612	);
613	#endif
614
615	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);
616		900
617	return cctx;	901	return cctx;
618	}	902	}
619		903
620	static void	904	static void
…		…
623	if (!cctx)	907	if (!cctx)
624	return;	908	return;
625		909
626	--cctx_count;	910	--cctx_count;
627		911
628	#if USE_VALGRIND	912	#if CORO_USE_VALGRIND
629	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
630	#endif	914	#endif
631		915
632	#if HAVE_MMAP	916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
633	munmap (cctx->sptr, cctx->ssize);	918	munmap (cctx->sptr, cctx->ssize);
634	#else	919	else
		920	#endif
635	Safefree (cctx->sptr);	921	Safefree (cctx->sptr);
636	#endif
637		922
638	Safefree (cctx);	923	Safefree (cctx);
639	}	924	}
640		925
641	static coro_cctx *	926	static coro_cctx *
642	cctx_get ()	927	cctx_get (pTHX)
643	{	928	{
644	coro_cctx *cctx;
645
646	if (cctx_first)	929	while (cctx_first)
647	{	930	{
648	cctx = cctx_first;	931	coro_cctx *cctx = cctx_first;
649	cctx_first = cctx->next;	932	cctx_first = cctx->next;
650	--cctx_idle;	933	--cctx_idle;
651	}	934
652	else	935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
653	{	936	return cctx;
654	cctx = cctx_new ();	937
655	PL_op = PL_op->op_next;	938	cctx_destroy (cctx);
656	}	939	}
657		940
658	return cctx;	941	return cctx_new ();
659	}	942	}
660		943
661	static void	944	static void
662	cctx_put (coro_cctx *cctx)	945	cctx_put (coro_cctx *cctx)
663	{	946	{
…		…
666	{	949	{
667	coro_cctx *first = cctx_first;	950	coro_cctx *first = cctx_first;
668	cctx_first = first->next;	951	cctx_first = first->next;
669	--cctx_idle;	952	--cctx_idle;
670		953
671	assert (!first->inuse);
672	cctx_destroy (first);	954	cctx_destroy (first);
673	}	955	}
674		956
675	++cctx_idle;	957	++cctx_idle;
676	cctx->next = cctx_first;	958	cctx->next = cctx_first;
677	cctx_first = cctx;	959	cctx_first = cctx;
678	}	960	}
679		961
680	/* never call directly, always through the coro_state_transfer global variable */	962	/** coroutine switching *****************************************************/
		963
681	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
682	transfer (struct coro *prev, struct coro *next, int flags)	985	transfer (pTHX_ struct coro *prev, struct coro *next)
683	{	986	{
684	dSTACKLEVEL;	987	dSTACKLEVEL;
685		988
686	/* sometimes transfer is only called to set idle_sp */	989	/* sometimes transfer is only called to set idle_sp */
687	if (flags == TRANSFER_SET_STACKLEVEL)	990	if (!next)
		991	{
688	((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	}
689	else if (prev != next)	995	else if (prev != next)
690	{	996	{
691	coro_cctx *prev__cctx;	997	coro_cctx *prev__cctx;
692		998
693	if (!prev->cctx)	999	if (prev->flags & CF_NEW)
694	{	1000	{
695	/* create a new empty context */	1001	/* create a new empty context */
696	Newz (0, prev->cctx, 1, coro_cctx);	1002	Newz (0, prev->cctx, 1, coro_cctx);
697	prev->cctx->inuse = 1;	1003	prev->flags &= ~CF_NEW;
698	prev->flags |= CF_RUNNING;	1004	prev->flags |= CF_RUNNING;
699	}	1005	}
700
701	if (!prev->flags & CF_RUNNING)
702	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
703
704	if (next->flags & CF_RUNNING)
705	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
706		1006
707	prev->flags &= ~CF_RUNNING;	1007	prev->flags &= ~CF_RUNNING;
708	next->flags |= CF_RUNNING;	1008	next->flags |= CF_RUNNING;
709		1009
710	LOCK;	1010	LOCK;
711		1011
712	if (next->mainstack)	1012	if (next->flags & CF_NEW)
713	{	1013	{
714	/* coroutine already started */	1014	/* need to start coroutine */
715	SAVE (prev, flags);	1015	next->flags &= ~CF_NEW;
716	LOAD (next);	1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
717	}	1020	}
718	else	1021	else
719	{	1022	{
720	/* need to start coroutine */	1023	/* coroutine already started */
721	/* first get rid of the old state */	1024	save_perl (aTHX_ prev);
722	SAVE (prev, -1);	1025	load_perl (aTHX_ next);
723	/* setup coroutine call */
724	setup_coro (next);
725	/* need a new stack */
726	assert (!next->stack);
727	}	1026	}
728		1027
729	prev__cctx = prev->cctx;	1028	prev__cctx = prev->cctx;
730		1029
731	/* possibly "free" the cctx */	1030	/* possibly "free" the cctx */
732	if (prev__cctx->idle_sp == STACKLEVEL)	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
733	{	1032	{
734	/* 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 */
735	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));
		1035
		1036	prev->cctx = 0;
736		1037
737	cctx_put (prev__cctx);	1038	cctx_put (prev__cctx);
738	prev->cctx = 0;
739	}	1039	}
740		1040
		1041	++next->usecount;
		1042
741	if (!next->cctx)	1043	if (!next->cctx)
742	next->cctx = cctx_get ();	1044	next->cctx = cctx_get (aTHX);
743		1045
744	if (prev__cctx != next->cctx)	1046	if (prev__cctx != next->cctx)
745	{	1047	{
746	assert ( prev__cctx->inuse);
747	assert (!next->cctx->inuse);
748
749	prev__cctx->inuse = 0;
750	next->cctx->inuse = 1;
751
752	prev__cctx->top_env = PL_top_env;	1048	prev__cctx->top_env = PL_top_env;
753	PL_top_env = next->cctx->top_env;	1049	PL_top_env = next->cctx->top_env;
754	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
755	}	1051	}
756		1052
757	free_coro_mortal ();	1053	free_coro_mortal (aTHX);
758
759	UNLOCK;	1054	UNLOCK;
760	}	1055	}
761	}	1056	}
762		1057
763	struct transfer_args	1058	struct transfer_args
764	{	1059	{
765	struct coro *prev, *next;	1060	struct coro *prev, *next;
766	int flags;
767	};	1061	};
768		1062
769	#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)
770		1065
		1066	/** high level stuff ********************************************************/
		1067
771	static void	1068	static int
772	coro_state_destroy (struct coro *coro)	1069	coro_state_destroy (pTHX_ struct coro *coro)
773	{	1070	{
774	if (coro->refcnt--)	1071	if (coro->flags & CF_DESTROYED)
775	return;	1072	return 0;
776		1073
		1074	coro->flags |= CF_DESTROYED;
		1075
777	if (coro->flags & CF_RUNNING)	1076	if (coro->flags & CF_READY)
778	croak ("FATAL: tried to destroy currently running coroutine");	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 */
779		1086
780	if (coro->mainstack && coro->mainstack != main_mainstack)	1087	if (coro->mainstack && coro->mainstack != main_mainstack)
781	{	1088	{
782	struct coro temp;	1089	struct coro temp;
783		1090
784	SAVE ((&temp), TRANSFER_SAVE_ALL);	1091	if (coro->flags & CF_RUNNING)
785	LOAD (coro);	1092	croak ("FATAL: tried to destroy currently running coroutine");
786		1093
787	coro_destroy_stacks ();	1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
788		1096
		1097	coro_destroy (aTHX_ coro);
		1098
789	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
790		1100
791	coro->mainstack = 0;	1101	coro->mainstack = 0;
792	}	1102	}
793		1103
794	cctx_destroy (coro->cctx);	1104	cctx_destroy (coro->cctx);
795	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
796	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;
797	}	1112	}
798		1113
799	static int	1114	static int
800	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
801	{	1116	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	1117	struct coro *coro = (struct coro *)mg->mg_ptr;
803	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
804		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
805	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
806		1127
807	return 0;	1128	return 0;
808	}	1129	}
809		1130
810	static int	1131	static int
…		…
817	return 0;	1138	return 0;
818	}	1139	}
819		1140
820	static MGVTBL coro_state_vtbl = {	1141	static MGVTBL coro_state_vtbl = {
821	0, 0, 0, 0,	1142	0, 0, 0, 0,
822	coro_state_clear,	1143	coro_state_free,
823	0,	1144	0,
824	#ifdef MGf_DUP	1145	#ifdef MGf_DUP
825	coro_state_dup,	1146	coro_state_dup,
826	#else	1147	#else
827	# define MGf_DUP 0	1148	# define MGf_DUP 0
828	#endif	1149	#endif
829	};	1150	};
830		1151
831	static struct coro *
832	SvSTATE (SV *coro)
833	{
834	HV *stash;
835	MAGIC *mg;
836
837	if (SvROK (coro))
838	coro = SvRV (coro);
839
840	stash = SvSTASH (coro);
841	if (stash != coro_stash && stash != coro_state_stash)
842	{
843	/* very slow, but rare, check */
844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845	croak ("Coro::State object required");
846	}
847
848	mg = SvMAGIC (coro);
849	assert (mg->mg_type == PERL_MAGIC_ext);
850	return (struct coro *)mg->mg_ptr;
851	}
852
853	static void	1152	static void
854	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)
855	{	1154	{
856	ta->prev = SvSTATE (prev);	1155	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	1156	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;	1157	TRANSFER_CHECK (*ta);
859	}	1158	}
860		1159
861	static void	1160	static void
862	api_transfer (SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
863	{	1162	{
864	dTHX;	1163	dTHX;
865	struct transfer_args ta;	1164	struct transfer_args ta;
866		1165
867	prepare_transfer (&ta, prev, next, flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	1167	TRANSFER (ta);
869	}	1168	}
870		1169
871	/** Coro ********************************************************************/	1170	/** Coro ********************************************************************/
872		1171
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV *coro_current, *coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	1172	static void
886	coro_enq (SV *coro_sv)	1173	coro_enq (pTHX_ SV *coro_sv)
887	{	1174	{
888	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);
889	coro_nready++;
890	}	1176	}
891		1177
892	static SV *	1178	static SV *
893	coro_deq (int min_prio)	1179	coro_deq (pTHX_ int min_prio)
894	{	1180	{
895	int prio = PRIO_MAX - PRIO_MIN;	1181	int prio = PRIO_MAX - PRIO_MIN;
896		1182
897	min_prio -= PRIO_MIN;	1183	min_prio -= PRIO_MIN;
898	if (min_prio < 0)	1184	if (min_prio < 0)
899	min_prio = 0;	1185	min_prio = 0;
900		1186
901	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
902	if (AvFILLp (coro_ready [prio]) >= 0)	1188	if (AvFILLp (coro_ready [prio]) >= 0)
903	{
904	coro_nready--;
905	return av_shift (coro_ready [prio]);	1189	return av_shift (coro_ready [prio]);
906	}
907		1190
908	return 0;	1191	return 0;
909	}	1192	}
910		1193
911	static int	1194	static int
912	api_ready (SV *coro_sv)	1195	api_ready (SV *coro_sv)
913	{	1196	{
		1197	dTHX;
914	struct coro *coro;	1198	struct coro *coro;
915		1199
916	if (SvROK (coro_sv))	1200	if (SvROK (coro_sv))
917	coro_sv = SvRV (coro_sv);	1201	coro_sv = SvRV (coro_sv);
918		1202
919	coro = SvSTATE (coro_sv);	1203	coro = SvSTATE (coro_sv);
920		1204
921	if (coro->flags & CF_READY)	1205	if (coro->flags & CF_READY)
922	return 0;	1206	return 0;
923		1207
924	if (coro->flags & CF_RUNNING)
925	croak ("Coro::ready called on currently running coroutine");
926
927	coro->flags |= CF_READY;	1208	coro->flags |= CF_READY;
928		1209
929	LOCK;	1210	LOCK;
930	coro_enq (SvREFCNT_inc (coro_sv));	1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
931	UNLOCK;	1213	UNLOCK;
932		1214
933	return 1;	1215	return 1;
934	}	1216	}
935		1217
936	static int	1218	static int
937	api_is_ready (SV *coro_sv)	1219	api_is_ready (SV *coro_sv)
938	{	1220	{
		1221	dTHX;
939	return !!SvSTATE (coro_sv)->flags & CF_READY;	1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
940	}	1223	}
941		1224
942	static void	1225	static void
943	prepare_schedule (struct transfer_args *ta)	1226	prepare_schedule (pTHX_ struct transfer_args *ta)
944	{	1227	{
945	SV *current, *prev, *next;	1228	SV *prev_sv, *next_sv;
946
947	current = GvSV (coro_current);
948		1229
949	for (;;)	1230	for (;;)
950	{	1231	{
951	LOCK;	1232	LOCK;
952	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;
953	UNLOCK;	1265	UNLOCK;
954
955	if (next)
956	break;	1266	break;
957
958	{
959	dSP;
960
961	ENTER;
962	SAVETMPS;
963
964	PUSHMARK (SP);
965	PUTBACK;
966	call_sv (GvSV (coro_idle), G_DISCARD);
967
968	FREETMPS;
969	LEAVE;
970	}	1267	}
971	}
972
973	prev = SvRV (current);
974	SvRV (current) = next;
975		1268
976	/* 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
977	LOCK;	1277	LOCK;
978	free_coro_mortal ();	1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
979	UNLOCK;	1280	UNLOCK;
980	coro_mortal = prev;
981
982	ta->prev = SvSTATE (prev);
983	ta->next = SvSTATE (next);
984	ta->flags = TRANSFER_SAVE_ALL;
985
986	ta->next->flags &= ~CF_READY;
987	}	1281	}
988		1282
989	static void	1283	static void
990	prepare_cede (struct transfer_args *ta)	1284	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1285	{
992	api_ready (GvSV (coro_current));	1286	api_ready (coro_current);
993
994	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;
995	}	1302	}
996		1303
997	static void	1304	static void
998	api_schedule (void)	1305	api_schedule (void)
999	{	1306	{
1000	dTHX;	1307	dTHX;
1001	struct transfer_args ta;	1308	struct transfer_args ta;
1002		1309
1003	prepare_schedule (&ta);	1310	prepare_schedule (aTHX_ &ta);
1004	TRANSFER (ta);	1311	TRANSFER (ta);
1005	}	1312	}
1006		1313
1007	static void	1314	static int
1008	api_cede (void)	1315	api_cede (void)
1009	{	1316	{
1010	dTHX;	1317	dTHX;
1011	struct transfer_args ta;	1318	struct transfer_args ta;
1012		1319
1013	prepare_cede (&ta);	1320	prepare_cede (aTHX_ &ta);
		1321
		1322	if (ta.prev != ta.next)
		1323	{
1014	TRANSFER (ta);	1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
1015	}	1329	}
1016		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
1017	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1018		1373
1019	PROTOTYPES: DISABLE	1374	PROTOTYPES: DISABLE
1020		1375
1021	BOOT:	1376	BOOT:
1022	{	1377	{
1023	#ifdef USE_ITHREADS	1378	#ifdef USE_ITHREADS
1024	MUTEX_INIT (&coro_mutex);	1379	MUTEX_INIT (&coro_mutex);
1025	#endif	1380	#endif
1026	BOOT_PAGESIZE;	1381	BOOT_PAGESIZE;
1027		1382
		1383	irsgv = gv_fetchpv ("/" , GV_ADD, SVt_PV);
		1384	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD, SVt_PVIO);
		1385
1028	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1386	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029		1387
1030	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1031	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1032	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));
1033		1392
1034	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;
1035		1398
1036	coroapi.ver = CORO_API_VERSION;	1399	coroapi.ver = CORO_API_VERSION;
1037	coroapi.transfer = api_transfer;	1400	coroapi.transfer = api_transfer;
1038		1401
1039	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1402	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1046	struct coro *coro;	1409	struct coro *coro;
1047	HV *hv;	1410	HV *hv;
1048	int i;	1411	int i;
1049		1412
1050	Newz (0, coro, 1, struct coro);	1413	Newz (0, coro, 1, struct coro);
1051	coro->args = newAV ();	1414	coro->args = newAV ();
		1415	coro->flags = CF_NEW;
1052		1416
		1417	if (coro_first) coro_first->prev = coro;
		1418	coro->next = coro_first;
		1419	coro_first = coro;
		1420
1053	hv = newHV ();	1421	coro->hv = hv = newHV ();
1054	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;
1055	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1423	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056		1424
1057	for (i = 1; i < items; i++)	1425	for (i = 1; i < items; i++)
1058	av_push (coro->args, newSVsv (ST (i)));	1426	av_push (coro->args, newSVsv (ST (i)));
1059	}	1427	}
1060	OUTPUT:	1428	OUTPUT:
1061	RETVAL	1429	RETVAL
1062		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
1063	void	1434	void
1064	_set_stacklevel (...)	1435	_set_stacklevel (...)
1065	ALIAS:	1436	ALIAS:
1066	Coro::State::transfer = 1	1437	Coro::State::transfer = 1
1067	Coro::schedule = 2	1438	Coro::schedule = 2
1068	Coro::cede = 3	1439	Coro::cede = 3
1069	Coro::Cont::yield = 4	1440	Coro::cede_notself = 4
1070	CODE:	1441	CODE:
1071	{	1442	{
1072	struct transfer_args ta;	1443	struct transfer_args ta;
1073		1444
1074	switch (ix)	1445	switch (ix)
1075	{	1446	{
1076	case 0:	1447	case 0:
1077	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1448	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1078	ta.next = 0;	1449	ta.next = 0;
1079	ta.flags = TRANSFER_SET_STACKLEVEL;
1080	break;	1450	break;
1081		1451
1082	case 1:	1452	case 1:
1083	if (items != 3)	1453	if (items != 2)
1084	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);
1085		1455
1086	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1456	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1087	break;	1457	break;
1088		1458
1089	case 2:	1459	case 2:
1090	prepare_schedule (&ta);	1460	prepare_schedule (aTHX_ &ta);
1091	break;	1461	break;
1092		1462
1093	case 3:	1463	case 3:
1094	prepare_cede (&ta);	1464	prepare_cede (aTHX_ &ta);
1095	break;	1465	break;
1096		1466
1097	case 4:	1467	case 4:
1098	{	1468	if (!prepare_cede_notself (aTHX_ &ta))
1099	SV *yieldstack;	1469	XSRETURN_EMPTY;
1100	SV *sv;
1101	AV *defav = GvAV (PL_defgv);
1102		1470
1103	yieldstack = *hv_fetch (
1104	(HV *)SvRV (GvSV (coro_current)),
1105	"yieldstack", sizeof ("yieldstack") - 1,
1106	0
1107	);
1108
1109	/* set up @_ -- ugly */
1110	av_clear (defav);
1111	av_fill (defav, items - 1);
1112	while (items--)
1113	av_store (defav, items, SvREFCNT_inc (ST(items)));
1114
1115	sv = av_pop ((AV *)SvRV (yieldstack));
1116	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1117	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1118	ta.flags = 0;
1119	SvREFCNT_dec (sv);
1120	}
1121	break;	1471	break;
1122
1123	}	1472	}
1124		1473
		1474	BARRIER;
1125	TRANSFER (ta);	1475	TRANSFER (ta);
1126	}
1127		1476
1128	void	1477	if (GIMME_V != G_VOID && ta.next != ta.prev)
1129	_clone_state_from (SV *dst, SV *src)	1478	XSRETURN_YES;
		1479	}
		1480
		1481	bool
		1482	_destroy (SV *coro_sv)
1130	CODE:	1483	CODE:
1131	{	1484	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1132	struct coro *coro_src = SvSTATE (src);	1485	OUTPUT:
1133		1486	RETVAL
1134	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1135
1136	++coro_src->refcnt;
1137	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1138	}
1139		1487
1140	void	1488	void
1141	_exit (code)	1489	_exit (code)
1142	int code	1490	int code
1143	PROTOTYPE: $	1491	PROTOTYPE: $
1144	CODE:	1492	CODE:
1145	_exit (code);	1493	_exit (code);
1146		1494
1147	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
1148	cctx_count ()	1505	cctx_count ()
1149	CODE:	1506	CODE:
1150	RETVAL = cctx_count;	1507	RETVAL = cctx_count;
1151	OUTPUT:	1508	OUTPUT:
1152	RETVAL	1509	RETVAL
…		…
1156	CODE:	1513	CODE:
1157	RETVAL = cctx_idle;	1514	RETVAL = cctx_idle;
1158	OUTPUT:	1515	OUTPUT:
1159	RETVAL	1516	RETVAL
1160		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
1161	MODULE = Coro::State PACKAGE = Coro	1616	MODULE = Coro::State PACKAGE = Coro
1162		1617
1163	BOOT:	1618	BOOT:
1164	{	1619	{
1165	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);
1166		1628
1167	coro_stash = gv_stashpv ("Coro", TRUE);	1629	coro_stash = gv_stashpv ("Coro", TRUE);
1168		1630
1169	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1631	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1170	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1632	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1171	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1633	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1172	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1634	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1173	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1635	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1174	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1636	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1175		1637
1176	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1177	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1178
1179	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1638	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1180	coro_ready[i] = newAV ();	1639	coro_ready[i] = newAV ();
1181		1640
1182	{	1641	{
1183	SV *sv = perl_get_sv("Coro::API", 1);	1642	SV *sv = perl_get_sv("Coro::API", 1);
1184		1643
1185	coroapi.schedule = api_schedule;	1644	coroapi.schedule = api_schedule;
1186	coroapi.cede = api_cede;	1645	coroapi.cede = api_cede;
		1646	coroapi.cede_notself = api_cede_notself;
1187	coroapi.ready = api_ready;	1647	coroapi.ready = api_ready;
1188	coroapi.is_ready = api_is_ready;	1648	coroapi.is_ready = api_is_ready;
1189	coroapi.nready = &coro_nready;	1649	coroapi.nready = &coro_nready;
1190	coroapi.current = coro_current;	1650	coroapi.current = coro_current;
1191		1651
1192	GCoroAPI = &coroapi;	1652	GCoroAPI = &coroapi;
1193	sv_setiv (sv, (IV)&coroapi);	1653	sv_setiv (sv, (IV)&coroapi);
1194	SvREADONLY_on (sv);	1654	SvREADONLY_on (sv);
1195	}	1655	}
1196	}	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)));
1197		1664
1198	int	1665	int
1199	prio (Coro::State coro, int newprio = 0)	1666	prio (Coro::State coro, int newprio = 0)
1200	ALIAS:	1667	ALIAS:
1201	nice = 1	1668	nice = 1
…		…
1204	RETVAL = coro->prio;	1671	RETVAL = coro->prio;
1205		1672
1206	if (items > 1)	1673	if (items > 1)
1207	{	1674	{
1208	if (ix)	1675	if (ix)
1209	newprio += coro->prio;	1676	newprio = coro->prio - newprio;
1210		1677
1211	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1678	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1212	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1679	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1213		1680
1214	coro->prio = newprio;	1681	coro->prio = newprio;
1215	}	1682	}
1216	}	1683	}
		1684	OUTPUT:
		1685	RETVAL
1217		1686
1218	SV *	1687	SV *
1219	ready (SV *self)	1688	ready (SV *self)
1220	PROTOTYPE: $	1689	PROTOTYPE: $
1221	CODE:	1690	CODE:
1222	RETVAL = boolSV (api_ready (self));	1691	RETVAL = boolSV (api_ready (self));
1223	OUTPUT:	1692	OUTPUT:
1224	RETVAL	1693	RETVAL
1225		1694
1226	SV *
1227	is_ready (SV *self)
1228	PROTOTYPE: $
1229	CODE:
1230	RETVAL = boolSV (api_is_ready (self));
1231	OUTPUT:
1232	RETVAL
1233
1234	int	1695	int
1235	nready (...)	1696	nready (...)
1236	PROTOTYPE:	1697	PROTOTYPE:
1237	CODE:	1698	CODE:
1238	RETVAL = coro_nready;	1699	RETVAL = coro_nready;
1239	OUTPUT:	1700	OUTPUT:
1240	RETVAL	1701	RETVAL
1241		1702
		1703	# for async_pool speedup
		1704	void
		1705	_pool_1 (SV *cb)
		1706	CODE:
		1707	{
		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
		1766
1242	MODULE = Coro::State PACKAGE = Coro::AIO	1767	MODULE = Coro::State PACKAGE = Coro::AIO
1243		1768
1244	SV *	1769	SV *
1245	_get_state ()	1770	_get_state ()
1246	CODE:	1771	CODE:
1247	{	1772	{
1248	struct {	1773	struct io_state *data;
1249	int errorno;
1250	int laststype;
1251	int laststatval;
1252	Stat_t statcache;
1253	} data;
1254		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
1255	data.errorno = errno;	1780	data->errorno = errno;
1256	data.laststype = PL_laststype;	1781	data->laststype = PL_laststype;
1257	data.laststatval = PL_laststatval;	1782	data->laststatval = PL_laststatval;
1258	data.statcache = PL_statcache;	1783	data->statcache = PL_statcache;
1259
1260	RETVAL = newSVpvn ((char *)&data, sizeof data);
1261	}	1784	}
1262	OUTPUT:	1785	OUTPUT:
1263	RETVAL	1786	RETVAL
1264		1787
1265	void	1788	void
1266	_set_state (char *data_)	1789	_set_state (char *data_)
1267	PROTOTYPE: $	1790	PROTOTYPE: $
1268	CODE:	1791	CODE:
1269	{	1792	{
1270	struct {	1793	struct io_state *data = (void *)data_;
1271	int errorno;
1272	int laststype;
1273	int laststatval;
1274	Stat_t statcache;
1275	} *data = (void *)data_;
1276		1794
1277	errno = data->errorno;	1795	errno = data->errorno;
1278	PL_laststype = data->laststype;	1796	PL_laststype = data->laststype;
1279	PL_laststatval = data->laststatval;	1797	PL_laststatval = data->laststatval;
1280	PL_statcache = data->statcache;	1798	PL_statcache = data->statcache;
1281	}	1799	}
		1800

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