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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.118 by root, Fri Dec 1 19:58:53 2006 UTC vs.
Revision 1.169 by root, Thu Sep 27 16:25:10 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	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
111	static struct coro_cctx *cctx_first;	142	static struct coro_cctx *cctx_first;
112	static int cctx_count, cctx_idle;	143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
113		153
114	/* this is a structure representing a c-level coroutine */	154	/* this is a structure representing a c-level coroutine */
115	typedef struct coro_cctx {	155	typedef struct coro_cctx {
116	struct coro_cctx *next;	156	struct coro_cctx *next;
117		157
118	/* the stack */	158	/* the stack */
119	void *sptr;	159	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	160	size_t ssize;
121		161
122	/* cpu state */	162	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	165	JMPENV *top_env;
125	coro_context cctx;	166	coro_context cctx;
126		167
127	int inuse;
128
129	#if USE_VALGRIND	168	#if CORO_USE_VALGRIND
130	int valgrind_id;	169	int valgrind_id;
131	#endif	170	#endif
		171	unsigned char flags;
132	} coro_cctx;	172	} coro_cctx;
133		173
134	enum {	174	enum {
135	CF_RUNNING = 0x0001, /* coroutine is running */	175	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY = 0x0002, /* coroutine is ready */	176	CF_READY = 0x0002, /* coroutine is ready */
137	CF_NEW = 0x0004, /* ahs never been switched to */	177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138	};	179	};
139		180
140	/* this is a structure representing a perl-level coroutine */	181	/* this is a structure representing a perl-level coroutine */
141	struct coro {	182	struct coro {
142	/* the c coroutine allocated to this perl coroutine, if any */	183	/* the c coroutine allocated to this perl coroutine, if any */
143	coro_cctx *cctx;	184	coro_cctx *cctx;
144		185
145	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
146	AV *args;	187	AV *args;
147	int refcnt;	188	int refcnt;
148	int flags;	189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
149		191
150	/* optionally saved, might be zero */	192	/* optionally saved, might be zero */
151	AV *defav;	193	AV *defav; /* @_ */
152	SV *defsv;	194	SV *defsv; /* $_ */
153	SV *errsv;	195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
154		199
155	#define VAR(name,type) type name;	200	#define VAR(name,type) type name;
156	# include "state.h"	201	# include "state.h"
157	#undef VAR	202	#undef VAR
158		203
159	/* coro process data */	204	/* coro process data */
160	int prio;	205	int prio;
		206
		207	/* linked list */
		208	struct coro *next, *prev;
		209	HV *hv; /* the perl hash associated with this coro, if any */
161	};	210	};
162		211
163	typedef struct coro *Coro__State;	212	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	213	typedef struct coro *Coro__State_or_hashref;
165		214
		215	/** Coro ********************************************************************/
		216
		217	#define PRIO_MAX 3
		218	#define PRIO_HIGH 1
		219	#define PRIO_NORMAL 0
		220	#define PRIO_LOW -1
		221	#define PRIO_IDLE -3
		222	#define PRIO_MIN -4
		223
		224	/* for Coro.pm */
		225	static SV *coro_current;
		226	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		227	static int coro_nready;
		228	static struct coro *coro_first;
		229
		230	/** lowlevel stuff **********************************************************/
		231
166	static AV *	232	static AV *
167	coro_clone_padlist (CV *cv)	233	coro_clone_padlist (pTHX_ CV *cv)
168	{	234	{
169	AV *padlist = CvPADLIST (cv);	235	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	236	AV *newpadlist, *newpad;
171		237
172	newpadlist = newAV ();	238	newpadlist = newAV ();
…		…
184		250
185	return newpadlist;	251	return newpadlist;
186	}	252	}
187		253
188	static void	254	static void
189	free_padlist (AV *padlist)	255	free_padlist (pTHX_ AV *padlist)
190	{	256	{
191	/* may be during global destruction */	257	/* may be during global destruction */
192	if (SvREFCNT (padlist))	258	if (SvREFCNT (padlist))
193	{	259	{
194	I32 i = AvFILLp (padlist);	260	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	281	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	282	AV *av = (AV *)mg->mg_obj;
217		283
218	/* casting is fun. */	284	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	285	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	286	free_padlist (aTHX_ padlist);
221		287
222	SvREFCNT_dec (av);	288	SvREFCNT_dec (av);
223		289
224	return 0;	290	return 0;
225	}	291	}
…		…
233	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	299	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234	? SvMAGIC (cv) \	300	? SvMAGIC (cv) \
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	301	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
236	: 0	302	: 0
237		303
		304	static struct coro *
		305	SvSTATE_ (pTHX_ SV *coro)
		306	{
		307	HV *stash;
		308	MAGIC *mg;
		309
		310	if (SvROK (coro))
		311	coro = SvRV (coro);
		312
		313	stash = SvSTASH (coro);
		314	if (stash != coro_stash && stash != coro_state_stash)
		315	{
		316	/* very slow, but rare, check */
		317	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		318	croak ("Coro::State object required");
		319	}
		320
		321	mg = CORO_MAGIC (coro);
		322	return (struct coro *)mg->mg_ptr;
		323	}
		324
		325	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		326
238	/* the next two functions merely cache the padlists */	327	/* the next two functions merely cache the padlists */
239	static void	328	static void
240	get_padlist (CV *cv)	329	get_padlist (pTHX_ CV *cv)
241	{	330	{
242	MAGIC *mg = CORO_MAGIC (cv);	331	MAGIC *mg = CORO_MAGIC (cv);
243	AV *av;	332	AV *av;
244		333
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	334	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	335	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	336	else
248	{	337	{
249	#if 0	338	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	339	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	340	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	341	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	342	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	343	SvREFCNT_dec (cp);
255	#else	344	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	345	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	346	#endif
258	}	347	}
259	}	348	}
260		349
261	static void	350	static void
262	put_padlist (CV *cv)	351	put_padlist (pTHX_ CV *cv)
263	{	352	{
264	MAGIC *mg = CORO_MAGIC (cv);	353	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	354	AV *av;
266		355
267	if (!mg)	356	if (!mg)
…		…
278	av_extend (av, AvMAX (av) + 1);	367	av_extend (av, AvMAX (av) + 1);
279		368
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	369	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	370	}
282		371
		372	/** load & save, init *******************************************************/
		373
283	#define SB do {	374	#define SB do {
284	#define SE } while (0)	375	#define SE } while (0)
285		376
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	377	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290		378
291	static void	379	static void
292	load_state (Coro__State c)	380	load_perl (pTHX_ Coro__State c)
293	{	381	{
294	#define VAR(name,type) PL_ ## name = c->name;	382	#define VAR(name,type) PL_ ## name = c->name;
295	# include "state.h"	383	# include "state.h"
296	#undef VAR	384	#undef VAR
297		385
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	386	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	387	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	388	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		389	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		390
		391	if (c->irssv)
		392	{
		393	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		394	{
		395	SvREFCNT_dec (c->irssv);
		396	c->irssv = 0;
		397	}
		398	else
		399	{
		400	REPLACE_SV (PL_rs, c->irssv);
		401	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		402	sv_setsv (c->irssv_sv, PL_rs);
		403	}
		404	}
301		405
302	{	406	{
303	dSP;	407	dSP;
304	CV *cv;	408	CV *cv;
305		409
306	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
308	{	412	{
309	put_padlist (cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	414	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	415	CvPADLIST (cv) = (AV *)POPs;
312	}	416	}
313		417
314	PUTBACK;	418	PUTBACK;
315	}	419	}
316	}	420	}
317		421
318	static void	422	static void
319	save_state (Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
320	{	424	{
321	{	425	{
322	dSP;	426	dSP;
323	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
327	/*	431	/*
328	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
329	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
330	*/	434	*/
331		435
332	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
334	for (;;)	438	for (;;)
335	{	439	{
336	while (cxix >= 0)	440	while (cxix >= 0)
337	{	441	{
338	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
339		443
340	if (CxTYPE (cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
341	{	445	{
342	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
343		447
344	if (CvDEPTH (cv))	448	if (CvDEPTH (cv))
345	{	449	{
346	EXTEND (SP, 3);	450	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	451	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
351		454
352	CvDEPTH (cv) = 0;	455	CvDEPTH (cv) = 0;
353	get_padlist (cv);	456	get_padlist (aTHX_ cv);
354	}	457	}
355	}	458	}
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	}	459	}
365		460
366	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
367	break;	462	break;
368		463
369	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
370	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
371	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
372	}	467	}
373		468
374	PUTBACK;	469	PUTBACK;
375	}	470	}
376		471
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		475	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		476	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
380		477
381	#define VAR(name,type)c->name = PL_ ## name;	478	#define VAR(name,type)c->name = PL_ ## name;
382	# include "state.h"	479	# include "state.h"
383	#undef VAR	480	#undef VAR
384	}	481	}
…		…
387	* allocate various perl stacks. This is an exact copy	484	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	485	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	486	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	487	* not usually need a lot of stackspace.
391	*/	488	*/
		489	#if CORO_PREFER_PERL_FUNCTIONS
		490	# define coro_init_stacks init_stacks
		491	#else
392	static void	492	static void
393	coro_init_stacks ()	493	coro_init_stacks (pTHX)
394	{	494	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	495	PL_curstackinfo = new_stackinfo(64, 6);
396	PL_curstackinfo->si_type = PERLSI_MAIN;	496	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	497	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	498	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399		499
400	PL_stack_base = AvARRAY(PL_curstack);	500	PL_stack_base = AvARRAY(PL_curstack);
401	PL_stack_sp = PL_stack_base;	501	PL_stack_sp = PL_stack_base;
402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	502	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403		503
404	New(50,PL_tmps_stack,128,SV*);	504	New(50,PL_tmps_stack,64,SV*);
405	PL_tmps_floor = -1;	505	PL_tmps_floor = -1;
406	PL_tmps_ix = -1;	506	PL_tmps_ix = -1;
407	PL_tmps_max = 128;	507	PL_tmps_max = 64;
408		508
409	New(54,PL_markstack,32,I32);	509	New(54,PL_markstack,16,I32);
410	PL_markstack_ptr = PL_markstack;	510	PL_markstack_ptr = PL_markstack;
411	PL_markstack_max = PL_markstack + 32;	511	PL_markstack_max = PL_markstack + 16;
412		512
413	#ifdef SET_MARK_OFFSET	513	#ifdef SET_MARK_OFFSET
414	SET_MARK_OFFSET;	514	SET_MARK_OFFSET;
415	#endif	515	#endif
416		516
417	New(54,PL_scopestack,32,I32);	517	New(54,PL_scopestack,16,I32);
418	PL_scopestack_ix = 0;	518	PL_scopestack_ix = 0;
419	PL_scopestack_max = 32;	519	PL_scopestack_max = 16;
420		520
421	New(54,PL_savestack,64,ANY);	521	New(54,PL_savestack,64,ANY);
422	PL_savestack_ix = 0;	522	PL_savestack_ix = 0;
423	PL_savestack_max = 64;	523	PL_savestack_max = 64;
424		524
425	#if !PERL_VERSION_ATLEAST (5,9,0)	525	#if !PERL_VERSION_ATLEAST (5,9,0)
426	New(54,PL_retstack,16,OP*);	526	New(54,PL_retstack,4,OP*);
427	PL_retstack_ix = 0;	527	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	528	PL_retstack_max = 4;
429	#endif	529	#endif
430	}	530	}
		531	#endif
431		532
432	/*	533	/*
433	* destroy the stacks, the callchain etc...	534	* destroy the stacks, the callchain etc...
434	*/	535	*/
435	static void	536	static void
436	coro_destroy_stacks ()	537	coro_destroy_stacks (pTHX)
437	{	538	{
438	if (!IN_DESTRUCT)	539	if (!IN_DESTRUCT)
439	{	540	{
440	/* is this ugly, I ask? */	541	/* restore all saved variables and stuff */
441	LEAVE_SCOPE (0);	542	LEAVE_SCOPE (0);
		543	assert (PL_tmps_floor == -1);
442		544
443	/* sure it is, but more important: is it correct?? :/ */	545	/* free all temporaries */
444	FREETMPS;	546	FREETMPS;
		547	assert (PL_tmps_ix == -1);
445		548
		549	/* unwind all extra stacks */
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	550	POPSTACK_TO (PL_mainstack);
		551
		552	/* unwind main stack */
		553	dounwind (-1);
447	}	554	}
448		555
449	while (PL_curstackinfo->si_next)	556	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	557	PL_curstackinfo = PL_curstackinfo->si_next;
451		558
452	while (PL_curstackinfo)	559	while (PL_curstackinfo)
453	{	560	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	561	PERL_SI *p = PL_curstackinfo->si_prev;
455		562
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	563	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	564	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		565
468	Safefree (PL_curstackinfo->si_cxstack);	566	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	567	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	568	PL_curstackinfo = p;
471	}	569	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	575	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	576	Safefree (PL_retstack);
479	#endif	577	#endif
480	}	578	}
481		579
		580	static size_t
		581	coro_rss (struct coro *coro)
		582	{
		583	size_t rss = sizeof (coro);
		584
		585	if (coro->mainstack)
		586	{
		587	if (coro->flags & CF_RUNNING)
		588	{
		589	#define VAR(name,type)coro->name = PL_ ## name;
		590	# include "state.h"
		591	#undef VAR
		592	}
		593
		594	rss += sizeof (coro->curstackinfo);
		595	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		596	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		597	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		598	rss += coro->tmps_max * sizeof (SV *);
		599	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		600	rss += coro->scopestack_max * sizeof (I32);
		601	rss += coro->savestack_max * sizeof (ANY);
		602
		603	#if !PERL_VERSION_ATLEAST (5,9,0)
		604	rss += coro->retstack_max * sizeof (OP *);
		605	#endif
		606	}
		607
		608	return rss;
		609	}
		610
		611	/** coroutine stack handling ************************************************/
		612
482	static void	613	static void
483	setup_coro (struct coro *coro)	614	setup_coro (pTHX_ struct coro *coro)
484	{	615	{
485	/*	616	/*
486	* emulate part of the perl startup here.	617	* emulate part of the perl startup here.
487	*/	618	*/
488
489	coro_init_stacks ();	619	coro_init_stacks (aTHX);
490		620
		621	PL_runops = RUNOPS_DEFAULT;
491	PL_curcop = &PL_compiling;	622	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	623	PL_in_eval = EVAL_NULL;
		624	PL_comppad = 0;
493	PL_curpm = 0;	625	PL_curpm = 0;
494	PL_localizing = 0;	626	PL_localizing = 0;
495	PL_dirty = 0;	627	PL_dirty = 0;
496	PL_restartop = 0;	628	PL_restartop = 0;
497		629
498	{	630	{
499	dSP;	631	dSP;
500	LOGOP myop;	632	LOGOP myop;
501		633
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));	634	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;	635	GvAV (PL_defgv) = coro->args; coro->args = 0;
507		636
508	Zero (&myop, 1, LOGOP);	637	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	638	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	639	myop.op_flags = OPf_WANT_VOID;
511		640
		641	PUSHMARK (SP);
		642	XPUSHs (av_shift (GvAV (PL_defgv)));
		643	PUTBACK;
512	PL_op = (OP *)&myop;	644	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);	645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	646	SPAGAIN;
519	}	647	}
520		648
521	ENTER; /* necessary e.g. for dounwind */	649	ENTER; /* necessary e.g. for dounwind */
522	}	650	}
523		651
524	static void	652	static void
525	free_coro_mortal ()	653	free_coro_mortal (pTHX)
526	{	654	{
527	if (coro_mortal)	655	if (coro_mortal)
528	{	656	{
529	SvREFCNT_dec (coro_mortal);	657	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	658	coro_mortal = 0;
531	}	659	}
532	}	660	}
533		661
		662	static int
		663	runops_trace (pTHX)
		664	{
		665	COP *oldcop = 0;
		666	int oldcxix = -2;
		667	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		668	coro_cctx *cctx = coro->cctx;
		669
		670	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		671	{
		672	PERL_ASYNC_CHECK ();
		673
		674	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		675	{
		676	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		677	SV **bot, **top;
		678	AV *av = newAV (); /* return values */
		679	SV **cb;
		680	runops_proc_t old_runops = PL_runops;
		681	dSP;
		682	ENTER;
		683	SAVETMPS;
		684	EXTEND (SP, 3);
		685	PL_runops = RUNOPS_DEFAULT;
		686
		687	GV *gv = CvGV (cx->blk_sub.cv);
		688	SV *fullname = sv_2mortal (newSV (0));
		689	if (isGV (gv))
		690	gv_efullname3 (fullname, gv, 0);
		691
		692	bot = PL_stack_base + cx->blk_oldsp + 1;
		693	top = cx->blk_gimme == G_ARRAY ? SP + 1
		694	: cx->blk_gimme == G_SCALAR ? bot + 1
		695	: bot;
		696
		697	while (bot < top)
		698	av_push (av, SvREFCNT_inc (*bot++));
		699
		700	PUSHMARK (SP);
		701	PUSHs (&PL_sv_no);
		702	PUSHs (fullname);
		703	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		704	PUTBACK;
		705	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		706	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		707	SPAGAIN;
		708
		709	FREETMPS;
		710	LEAVE;
		711	PL_runops = old_runops;
		712	}
		713
		714	if (oldcop != PL_curcop)
		715	{
		716	oldcop = PL_curcop;
		717
		718	if (PL_curcop != &PL_compiling)
		719	{
		720	SV **cb;
		721	runops_proc_t old_runops = PL_runops;
		722	dSP;
		723	ENTER;
		724	SAVETMPS;
		725	EXTEND (SP, 3);
		726	PL_runops = RUNOPS_DEFAULT;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	GV *gv = CvGV (cx->blk_sub.cv);
		735	SV *fullname = sv_2mortal (newSV (0));
		736	if (isGV (gv))
		737	gv_efullname3 (fullname, gv, 0);
		738
		739	PUSHMARK (SP);
		740	PUSHs (&PL_sv_yes);
		741	PUSHs (fullname);
		742	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		743	PUTBACK;
		744	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		745	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		746	SPAGAIN;
		747	}
		748
		749	oldcxix = cxstack_ix;
		750	}
		751
		752	if (cctx->flags & CC_TRACE_LINE)
		753	{
		754	PUSHMARK (SP);
		755	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		756	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		757	PUTBACK;
		758	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		759	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		760	SPAGAIN;
		761	}
		762
		763	FREETMPS;
		764	LEAVE;
		765	PL_runops = old_runops;
		766	}
		767	}
		768	}
		769
		770	TAINT_NOT;
		771	return 0;
		772	}
		773
		774	/* inject a fake call to Coro::State::_cctx_init into the execution */
		775	/* _cctx_init should be careful, as it could be called at almost any time */
		776	/* during execution of a perl program */
534	static void NOINLINE	777	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	778	prepare_cctx (pTHX_ coro_cctx *cctx)
536	{	779	{
537	dSP;	780	dSP;
538	LOGOP myop;	781	LOGOP myop;
539		782
		783	PL_top_env = &PL_start_env;
		784
		785	if (cctx->flags & CC_TRACE)
		786	PL_runops = runops_trace;
		787
540	Zero (&myop, 1, LOGOP);	788	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	789	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	790	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		791
546	PUSHMARK (SP);	792	PUSHMARK (SP);
		793	EXTEND (SP, 2);
		794	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	795	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	796	PUTBACK;
		797	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	798	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	799	SPAGAIN;
551	}	800	}
552		801
		802	/*
		803	* this is a _very_ stripped down perl interpreter ;)
		804	*/
553	static void	805	static void
554	coro_run (void *arg)	806	coro_run (void *arg)
555	{	807	{
		808	dTHX;
		809
556	/* coro_run is the alternative epilogue of transfer() */	810	/* coro_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	811	UNLOCK;
558		812
		813	/* we now skip the entersub that lead to transfer() */
		814	PL_op = PL_op->op_next;
		815
		816	/* inject a fake subroutine call to cctx_init */
		817	prepare_cctx (aTHX_ (coro_cctx *)arg);
		818
		819	/* somebody or something will hit me for both perl_run and PL_restartop */
		820	PL_restartop = PL_op;
		821	perl_run (PL_curinterp);
		822
559	/*	823	/*
560	* this is a _very_ stripped down perl interpreter ;)	824	* If perl-run returns we assume exit() was being called or the coro
		825	* fell off the end, which seems to be the only valid (non-bug)
		826	* reason for perl_run to return. We try to exit by jumping to the
		827	* bootstrap-time "top" top_env, as we cannot restore the "main"
		828	* coroutine as Coro has no such concept
561	*/	829	*/
562	PL_top_env = &PL_start_env;	830	PL_top_env = main_top_env;
563		831	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	}	832	}
573		833
574	static coro_cctx *	834	static coro_cctx *
575	cctx_new ()	835	cctx_new ()
576	{	836	{
577	coro_cctx *cctx;	837	coro_cctx *cctx;
		838	void *stack_start;
		839	size_t stack_size;
578		840
579	++cctx_count;	841	++cctx_count;
580		842
581	New (0, cctx, 1, coro_cctx);	843	Newz (0, cctx, 1, coro_cctx);
582		844
583	#if HAVE_MMAP	845	#if HAVE_MMAP
584		846
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	847	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	848	/* 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);	849	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		850
589	if (cctx->sptr == (void *)-1)	851	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	852	{
594
595	# if STACKGUARD	853	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	854	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	855	# endif
		856	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		857	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		858	cctx->flags |= CC_MAPPED;
		859	}
		860	else
		861	#endif
		862	{
		863	cctx->ssize = coro_stacksize * (long)sizeof (long);
		864	New (0, cctx->sptr, coro_stacksize, long);
598		865
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	866	if (!cctx->sptr)
605	{	867	{
606	perror ("FATAL: unable to malloc stack for coroutine");	868	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	869	_exit (EXIT_FAILURE);
608	}	870	}
609		871
610	#endif	872	stack_start = cctx->sptr;
		873	stack_size = cctx->ssize;
		874	}
611		875
612	#if USE_VALGRIND	876	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);	877	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
620		878
621	return cctx;	879	return cctx;
622	}	880	}
623		881
624	static void	882	static void
…		…
627	if (!cctx)	885	if (!cctx)
628	return;	886	return;
629		887
630	--cctx_count;	888	--cctx_count;
631		889
632	#if USE_VALGRIND	890	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	891	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	892	#endif
635		893
636	#if HAVE_MMAP	894	#if HAVE_MMAP
		895	if (cctx->flags & CC_MAPPED)
637	munmap (cctx->sptr, cctx->ssize);	896	munmap (cctx->sptr, cctx->ssize);
638	#else	897	else
		898	#endif
639	Safefree (cctx->sptr);	899	Safefree (cctx->sptr);
640	#endif
641		900
642	Safefree (cctx);	901	Safefree (cctx);
643	}	902	}
644		903
645	static coro_cctx *	904	static coro_cctx *
646	cctx_get ()	905	cctx_get (pTHX)
647	{	906	{
648	coro_cctx *cctx;
649
650	if (cctx_first)	907	while (cctx_first)
651	{	908	{
652	cctx = cctx_first;	909	coro_cctx *cctx = cctx_first;
653	cctx_first = cctx->next;	910	cctx_first = cctx->next;
654	--cctx_idle;	911	--cctx_idle;
655	}	912
656	else	913	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
657	{	914	return cctx;
658	cctx = cctx_new ();	915
659	PL_op = PL_op->op_next;	916	cctx_destroy (cctx);
660	}	917	}
661		918
662	return cctx;	919	return cctx_new ();
663	}	920	}
664		921
665	static void	922	static void
666	cctx_put (coro_cctx *cctx)	923	cctx_put (coro_cctx *cctx)
667	{	924	{
…		…
670	{	927	{
671	coro_cctx *first = cctx_first;	928	coro_cctx *first = cctx_first;
672	cctx_first = first->next;	929	cctx_first = first->next;
673	--cctx_idle;	930	--cctx_idle;
674		931
675	assert (!first->inuse);
676	cctx_destroy (first);	932	cctx_destroy (first);
677	}	933	}
678		934
679	++cctx_idle;	935	++cctx_idle;
680	cctx->next = cctx_first;	936	cctx->next = cctx_first;
681	cctx_first = cctx;	937	cctx_first = cctx;
682	}	938	}
683		939
		940	/** coroutine switching *****************************************************/
		941
684	/* never call directly, always through the coro_state_transfer global variable */	942	/* never call directly, always through the coro_state_transfer global variable */
685	static void NOINLINE	943	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	944	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	945	{
688	dSTACKLEVEL;	946	dSTACKLEVEL;
689		947
690	/* sometimes transfer is only called to set idle_sp */	948	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	949	if (!next)
		950	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	951	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		952	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		953	}
693	else if (prev != next)	954	else if (prev != next)
694	{	955	{
695	coro_cctx *prev__cctx;	956	coro_cctx *prev__cctx;
696		957
697	if (prev->flags & CF_NEW)	958	if (prev->flags & CF_NEW)
698	{	959	{
699	/* create a new empty context */	960	/* create a new empty context */
700	Newz (0, prev->cctx, 1, coro_cctx);	961	Newz (0, prev->cctx, 1, coro_cctx);
701	prev->cctx->inuse = 1;
702	prev->flags &= ~CF_NEW;	962	prev->flags &= ~CF_NEW;
703	prev->flags |= CF_RUNNING;	963	prev->flags |= CF_RUNNING;
704	}	964	}
705		965
706	/*TODO: must not croak here */	966	/*TODO: must not croak here */
707	if (!prev->flags & CF_RUNNING)	967	if (!prev->flags & CF_RUNNING)
708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	968	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709		969
710	if (next->flags & CF_RUNNING)	970	if (next->flags & CF_RUNNING)
711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	971	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		972
		973	if (next->flags & CF_DESTROYED)
		974	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
712		975
713	prev->flags &= ~CF_RUNNING;	976	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	977	next->flags |= CF_RUNNING;
715		978
716	LOCK;	979	LOCK;
…		…
718	if (next->flags & CF_NEW)	981	if (next->flags & CF_NEW)
719	{	982	{
720	/* need to start coroutine */	983	/* need to start coroutine */
721	next->flags &= ~CF_NEW;	984	next->flags &= ~CF_NEW;
722	/* first get rid of the old state */	985	/* first get rid of the old state */
723	SAVE (prev, -1);	986	save_perl (aTHX_ prev);
724	/* setup coroutine call */	987	/* setup coroutine call */
725	setup_coro (next);	988	setup_coro (aTHX_ next);
726	/* need a new stack */
727	assert (!next->stack);
728	}	989	}
729	else	990	else
730	{	991	{
731	/* coroutine already started */	992	/* coroutine already started */
732	SAVE (prev, flags);	993	save_perl (aTHX_ prev);
733	LOAD (next);	994	load_perl (aTHX_ next);
734	}	995	}
735		996
736	prev__cctx = prev->cctx;	997	prev__cctx = prev->cctx;
737		998
738	/* possibly "free" the cctx */	999	/* possibly "free" the cctx */
739	if (prev__cctx->idle_sp == STACKLEVEL && 0)	1000	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
740	{	1001	{
741	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1002	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742	assert (PL_top_env == prev__cctx->top_env);	1003	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
743		1004
744	prev->cctx = 0;	1005	prev->cctx = 0;
745		1006
746	cctx_put (prev__cctx);	1007	cctx_put (prev__cctx);
747	prev__cctx->inuse = 0;
748	}	1008	}
749		1009
750	if (!next->cctx)	1010	if (!next->cctx)
751	{
752	next->cctx = cctx_get ();	1011	next->cctx = cctx_get (aTHX);
753	assert (!next->cctx->inuse);
754	next->cctx->inuse = 1;
755	}
756		1012
757	if (prev__cctx != next->cctx)	1013	if (prev__cctx != next->cctx)
758	{	1014	{
759	prev__cctx->top_env = PL_top_env;	1015	prev__cctx->top_env = PL_top_env;
760	PL_top_env = next->cctx->top_env;	1016	PL_top_env = next->cctx->top_env;
761	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1017	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762	}	1018	}
763		1019
764	free_coro_mortal ();	1020	free_coro_mortal (aTHX);
765
766	UNLOCK;	1021	UNLOCK;
767	}	1022	}
768	}	1023	}
769		1024
770	struct transfer_args	1025	struct transfer_args
771	{	1026	{
772	struct coro *prev, *next;	1027	struct coro *prev, *next;
773	int flags;
774	};	1028	};
775		1029
776	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1030	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
777		1031
		1032	/** high level stuff ********************************************************/
		1033
778	static void	1034	static int
779	coro_state_destroy (struct coro *coro)	1035	coro_state_destroy (pTHX_ struct coro *coro)
780	{	1036	{
781	if (coro->refcnt--)	1037	if (coro->flags & CF_DESTROYED)
782	return;	1038	return 0;
		1039
		1040	coro->flags |= CF_DESTROYED;
		1041
		1042	if (coro->flags & CF_READY)
		1043	{
		1044	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1045	/* alternative: look through all ready queues and remove the coro */
		1046	LOCK;
		1047	--coro_nready;
		1048	UNLOCK;
		1049	}
		1050	else
		1051	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
783		1052
784	if (coro->mainstack && coro->mainstack != main_mainstack)	1053	if (coro->mainstack && coro->mainstack != main_mainstack)
785	{	1054	{
786	struct coro temp;	1055	struct coro temp;
		1056
		1057	assert (!(coro->flags & CF_RUNNING));
		1058
		1059	Zero (&temp, 1, struct coro);
		1060	temp.save = CORO_SAVE_ALL;
787		1061
788	if (coro->flags & CF_RUNNING)	1062	if (coro->flags & CF_RUNNING)
789	croak ("FATAL: tried to destroy currently running coroutine");	1063	croak ("FATAL: tried to destroy currently running coroutine");
790		1064
791	SAVE ((&temp), TRANSFER_SAVE_ALL);	1065	save_perl (aTHX_ &temp);
792	LOAD (coro);	1066	load_perl (aTHX_ coro);
793		1067
794	coro_destroy_stacks ();	1068	coro_destroy_stacks (aTHX);
795		1069
796	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1070	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
797		1071
798	coro->mainstack = 0;	1072	coro->mainstack = 0;
799	}	1073	}
800		1074
801	cctx_destroy (coro->cctx);	1075	cctx_destroy (coro->cctx);
802	SvREFCNT_dec (coro->args);	1076	SvREFCNT_dec (coro->args);
803	Safefree (coro);	1077
		1078	if (coro->next) coro->next->prev = coro->prev;
		1079	if (coro->prev) coro->prev->next = coro->next;
		1080	if (coro == coro_first) coro_first = coro->next;
		1081
		1082	return 1;
804	}	1083	}
805		1084
806	static int	1085	static int
807	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1086	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808	{	1087	{
809	struct coro *coro = (struct coro *)mg->mg_ptr;	1088	struct coro *coro = (struct coro *)mg->mg_ptr;
810	mg->mg_ptr = 0;	1089	mg->mg_ptr = 0;
811		1090
		1091	coro->hv = 0;
		1092
		1093	if (--coro->refcnt < 0)
		1094	{
812	coro_state_destroy (coro);	1095	coro_state_destroy (aTHX_ coro);
		1096	Safefree (coro);
		1097	}
813		1098
814	return 0;	1099	return 0;
815	}	1100	}
816		1101
817	static int	1102	static int
…		…
824	return 0;	1109	return 0;
825	}	1110	}
826		1111
827	static MGVTBL coro_state_vtbl = {	1112	static MGVTBL coro_state_vtbl = {
828	0, 0, 0, 0,	1113	0, 0, 0, 0,
829	coro_state_clear,	1114	coro_state_free,
830	0,	1115	0,
831	#ifdef MGf_DUP	1116	#ifdef MGf_DUP
832	coro_state_dup,	1117	coro_state_dup,
833	#else	1118	#else
834	# define MGf_DUP 0	1119	# define MGf_DUP 0
835	#endif	1120	#endif
836	};	1121	};
837		1122
838	static struct coro *
839	SvSTATE (SV *coro)
840	{
841	HV *stash;
842	MAGIC *mg;
843
844	if (SvROK (coro))
845	coro = SvRV (coro);
846
847	stash = SvSTASH (coro);
848	if (stash != coro_stash && stash != coro_state_stash)
849	{
850	/* very slow, but rare, check */
851	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852	croak ("Coro::State object required");
853	}
854
855	mg = SvMAGIC (coro);
856	assert (mg->mg_type == PERL_MAGIC_ext);
857	return (struct coro *)mg->mg_ptr;
858	}
859
860	static void	1123	static void
861	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1124	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
862	{	1125	{
863	ta->prev = SvSTATE (prev);	1126	ta->prev = SvSTATE (prev_sv);
864	ta->next = SvSTATE (next);	1127	ta->next = SvSTATE (next_sv);
865	ta->flags = flags;
866	}	1128	}
867		1129
868	static void	1130	static void
869	api_transfer (SV *prev, SV *next, int flags)	1131	api_transfer (SV *prev_sv, SV *next_sv)
870	{	1132	{
		1133	dTHX;
871	struct transfer_args ta;	1134	struct transfer_args ta;
872		1135
873	prepare_transfer (&ta, prev, next, flags);	1136	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874	TRANSFER (ta);	1137	TRANSFER (ta);
875	}	1138	}
876		1139
		1140	static int
		1141	api_save (SV *coro_sv, int new_save)
		1142	{
		1143	dTHX;
		1144	struct coro *coro = SvSTATE (coro_sv);
		1145	int old_save = coro->save;
		1146
		1147	if (new_save >= 0)
		1148	coro->save = new_save;
		1149
		1150	return old_save;
		1151	}
		1152
877	/** Coro ********************************************************************/	1153	/** Coro ********************************************************************/
878		1154
879	#define PRIO_MAX 3
880	#define PRIO_HIGH 1
881	#define PRIO_NORMAL 0
882	#define PRIO_LOW -1
883	#define PRIO_IDLE -3
884	#define PRIO_MIN -4
885
886	/* for Coro.pm */
887	static SV *coro_current;
888	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889	static int coro_nready;
890
891	static void	1155	static void
892	coro_enq (SV *coro_sv)	1156	coro_enq (pTHX_ SV *coro_sv)
893	{	1157	{
894	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1158	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
895	coro_nready++;
896	}	1159	}
897		1160
898	static SV *	1161	static SV *
899	coro_deq (int min_prio)	1162	coro_deq (pTHX_ int min_prio)
900	{	1163	{
901	int prio = PRIO_MAX - PRIO_MIN;	1164	int prio = PRIO_MAX - PRIO_MIN;
902		1165
903	min_prio -= PRIO_MIN;	1166	min_prio -= PRIO_MIN;
904	if (min_prio < 0)	1167	if (min_prio < 0)
905	min_prio = 0;	1168	min_prio = 0;
906		1169
907	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1170	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
908	if (AvFILLp (coro_ready [prio]) >= 0)	1171	if (AvFILLp (coro_ready [prio]) >= 0)
909	{
910	coro_nready--;
911	return av_shift (coro_ready [prio]);	1172	return av_shift (coro_ready [prio]);
912	}
913		1173
914	return 0;	1174	return 0;
915	}	1175	}
916		1176
917	static int	1177	static int
918	api_ready (SV *coro_sv)	1178	api_ready (SV *coro_sv)
919	{	1179	{
		1180	dTHX;
920	struct coro *coro;	1181	struct coro *coro;
921		1182
922	if (SvROK (coro_sv))	1183	if (SvROK (coro_sv))
923	coro_sv = SvRV (coro_sv);	1184	coro_sv = SvRV (coro_sv);
924		1185
925	coro = SvSTATE (coro_sv);	1186	coro = SvSTATE (coro_sv);
926		1187
927	if (coro->flags & CF_READY)	1188	if (coro->flags & CF_READY)
928	return 0;	1189	return 0;
929		1190
930	#if 0 /* this is actually harmless */
931	if (coro->flags & CF_RUNNING)
932	croak ("Coro::ready called on currently running coroutine");
933	#endif
934
935	coro->flags |= CF_READY;	1191	coro->flags |= CF_READY;
936		1192
937	LOCK;	1193	LOCK;
938	coro_enq (SvREFCNT_inc (coro_sv));	1194	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1195	++coro_nready;
939	UNLOCK;	1196	UNLOCK;
940		1197
941	return 1;	1198	return 1;
942	}	1199	}
943		1200
944	static int	1201	static int
945	api_is_ready (SV *coro_sv)	1202	api_is_ready (SV *coro_sv)
946	{	1203	{
		1204	dTHX;
947	return !!SvSTATE (coro_sv)->flags & CF_READY;	1205	return !!(SvSTATE (coro_sv)->flags & CF_READY);
948	}	1206	}
949		1207
950	static void	1208	static void
951	prepare_schedule (struct transfer_args *ta)	1209	prepare_schedule (pTHX_ struct transfer_args *ta)
952	{	1210	{
953	SV *prev, *next;	1211	SV *prev_sv, *next_sv;
954		1212
955	for (;;)	1213	for (;;)
956	{	1214	{
957	LOCK;	1215	LOCK;
958	next = coro_deq (PRIO_MIN);	1216	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1217
		1218	/* nothing to schedule: call the idle handler */
		1219	if (!next_sv)
		1220	{
		1221	dSP;
		1222	UNLOCK;
		1223
		1224	ENTER;
		1225	SAVETMPS;
		1226
		1227	PUSHMARK (SP);
		1228	PUTBACK;
		1229	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1230
		1231	FREETMPS;
		1232	LEAVE;
		1233	continue;
		1234	}
		1235
		1236	ta->next = SvSTATE (next_sv);
		1237
		1238	/* cannot transfer to destroyed coros, skip and look for next */
		1239	if (ta->next->flags & CF_DESTROYED)
		1240	{
		1241	UNLOCK;
		1242	SvREFCNT_dec (next_sv);
		1243	/* coro_nready is already taken care of by destroy */
		1244	continue;
		1245	}
		1246
		1247	--coro_nready;
959	UNLOCK;	1248	UNLOCK;
960
961	if (next)
962	break;	1249	break;
963
964	{
965	dSP;
966
967	ENTER;
968	SAVETMPS;
969
970	PUSHMARK (SP);
971	PUTBACK;
972	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974	FREETMPS;
975	LEAVE;
976	}	1250	}
977	}
978
979	prev = SvRV (coro_current);
980	SvRV_set (coro_current, next);
981		1251
982	/* free this only after the transfer */	1252	/* free this only after the transfer */
		1253	prev_sv = SvRV (coro_current);
		1254	SvRV_set (coro_current, next_sv);
		1255	ta->prev = SvSTATE (prev_sv);
		1256
		1257	assert (ta->next->flags & CF_READY);
		1258	ta->next->flags &= ~CF_READY;
		1259
983	LOCK;	1260	LOCK;
984	free_coro_mortal ();	1261	free_coro_mortal (aTHX);
		1262	coro_mortal = prev_sv;
985	UNLOCK;	1263	UNLOCK;
986	coro_mortal = prev;
987
988	assert (!SvROK(prev));//D
989	assert (!SvROK(next));//D
990
991	ta->prev = SvSTATE (prev);
992	ta->next = SvSTATE (next);
993	ta->flags = TRANSFER_SAVE_ALL;
994
995	assert (ta->flags & CF_READY);
996	ta->next->flags &= ~CF_READY;
997	}	1264	}
998		1265
999	static void	1266	static void
1000	prepare_cede (struct transfer_args *ta)	1267	prepare_cede (pTHX_ struct transfer_args *ta)
1001	{	1268	{
1002	api_ready (coro_current);	1269	api_ready (coro_current);
1003
1004	prepare_schedule (ta);	1270	prepare_schedule (aTHX_ ta);
		1271	}
		1272
		1273	static int
		1274	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1275	{
		1276	if (coro_nready)
		1277	{
		1278	SV *prev = SvRV (coro_current);
		1279	prepare_schedule (aTHX_ ta);
		1280	api_ready (prev);
		1281	return 1;
		1282	}
		1283	else
		1284	return 0;
1005	}	1285	}
1006		1286
1007	static void	1287	static void
1008	api_schedule (void)	1288	api_schedule (void)
1009	{	1289	{
		1290	dTHX;
1010	struct transfer_args ta;	1291	struct transfer_args ta;
1011		1292
1012	prepare_schedule (&ta);	1293	prepare_schedule (aTHX_ &ta);
1013	TRANSFER (ta);	1294	TRANSFER (ta);
1014	}	1295	}
1015		1296
1016	static void	1297	static int
1017	api_cede (void)	1298	api_cede (void)
1018	{	1299	{
		1300	dTHX;
1019	struct transfer_args ta;	1301	struct transfer_args ta;
1020		1302
1021	prepare_cede (&ta);	1303	prepare_cede (aTHX_ &ta);
		1304
		1305	if (ta.prev != ta.next)
		1306	{
1022	TRANSFER (ta);	1307	TRANSFER (ta);
		1308	return 1;
		1309	}
		1310	else
		1311	return 0;
		1312	}
		1313
		1314	static int
		1315	api_cede_notself (void)
		1316	{
		1317	dTHX;
		1318	struct transfer_args ta;
		1319
		1320	if (prepare_cede_notself (aTHX_ &ta))
		1321	{
		1322	TRANSFER (ta);
		1323	return 1;
		1324	}
		1325	else
		1326	return 0;
1023	}	1327	}
1024		1328
1025	MODULE = Coro::State PACKAGE = Coro::State	1329	MODULE = Coro::State PACKAGE = Coro::State
1026		1330
1027	PROTOTYPES: DISABLE	1331	PROTOTYPES: DISABLE
…		…
1033	#endif	1337	#endif
1034	BOOT_PAGESIZE;	1338	BOOT_PAGESIZE;
1035		1339
1036	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1340	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037		1341
		1342	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1343	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1344	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1345	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1346
1038	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1347	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1348	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1040	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1349	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1350	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1351	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1352	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1353	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1041		1354
1042	main_mainstack = PL_mainstack;	1355	main_mainstack = PL_mainstack;
		1356	main_top_env = PL_top_env;
		1357
		1358	while (main_top_env->je_prev)
		1359	main_top_env = main_top_env->je_prev;
1043		1360
1044	coroapi.ver = CORO_API_VERSION;	1361	coroapi.ver = CORO_API_VERSION;
1045	coroapi.transfer = api_transfer;	1362	coroapi.transfer = api_transfer;
1046		1363
1047	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1364	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1055	HV *hv;	1372	HV *hv;
1056	int i;	1373	int i;
1057		1374
1058	Newz (0, coro, 1, struct coro);	1375	Newz (0, coro, 1, struct coro);
1059	coro->args = newAV ();	1376	coro->args = newAV ();
		1377	coro->save = CORO_SAVE_DEF;
1060	coro->flags = CF_NEW;	1378	coro->flags = CF_NEW;
1061		1379
		1380	if (coro_first) coro_first->prev = coro;
		1381	coro->next = coro_first;
		1382	coro_first = coro;
		1383
1062	hv = newHV ();	1384	coro->hv = hv = newHV ();
1063	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1385	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1064	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1386	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065		1387
1066	for (i = 1; i < items; i++)	1388	for (i = 1; i < items; i++)
1067	av_push (coro->args, newSVsv (ST (i)));	1389	av_push (coro->args, newSVsv (ST (i)));
1068	}	1390	}
1069	OUTPUT:	1391	OUTPUT:
		1392	RETVAL
		1393
		1394	int
		1395	save (SV *coro, int new_save = -1)
		1396	CODE:
		1397	RETVAL = api_save (coro, new_save);
		1398	OUTPUT:
		1399	RETVAL
		1400
		1401	int
		1402	save_also (SV *coro_sv, int save_also)
		1403	CODE:
		1404	{
		1405	struct coro *coro = SvSTATE (coro_sv);
		1406	RETVAL = coro->save;
		1407	coro->save |= save_also;
		1408	}
		1409	OUTPUT:
1070	RETVAL	1410	RETVAL
1071		1411
1072	void	1412	void
1073	_set_stacklevel (...)	1413	_set_stacklevel (...)
1074	ALIAS:	1414	ALIAS:
1075	Coro::State::transfer = 1	1415	Coro::State::transfer = 1
1076	Coro::schedule = 2	1416	Coro::schedule = 2
1077	Coro::cede = 3	1417	Coro::cede = 3
		1418	Coro::cede_notself = 4
1078	CODE:	1419	CODE:
1079	{	1420	{
1080	struct transfer_args ta;	1421	struct transfer_args ta;
1081		1422
1082	switch (ix)	1423	switch (ix)
1083	{	1424	{
1084	case 0:	1425	case 0:
1085	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1426	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1086	ta.next = 0;	1427	ta.next = 0;
1087	ta.flags = TRANSFER_SET_STACKLEVEL;
1088	break;	1428	break;
1089		1429
1090	case 1:	1430	case 1:
1091	if (items != 3)	1431	if (items != 2)
1092	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1432	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1093		1433
1094	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1434	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1095	break;	1435	break;
1096		1436
1097	case 2:	1437	case 2:
1098	prepare_schedule (&ta);	1438	prepare_schedule (aTHX_ &ta);
1099	break;	1439	break;
1100		1440
1101	case 3:	1441	case 3:
1102	prepare_cede (&ta);	1442	prepare_cede (aTHX_ &ta);
		1443	break;
		1444
		1445	case 4:
		1446	if (!prepare_cede_notself (aTHX_ &ta))
		1447	XSRETURN_EMPTY;
		1448
1103	break;	1449	break;
1104	}	1450	}
1105		1451
		1452	BARRIER;
1106	TRANSFER (ta);	1453	TRANSFER (ta);
1107	}
1108		1454
1109	void	1455	if (GIMME_V != G_VOID && ta.next != ta.prev)
1110	_clone_state_from (SV *dst, SV *src)	1456	XSRETURN_YES;
		1457	}
		1458
		1459	bool
		1460	_destroy (SV *coro_sv)
1111	CODE:	1461	CODE:
1112	{	1462	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1113	struct coro *coro_src = SvSTATE (src);	1463	OUTPUT:
1114		1464	RETVAL
1115	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1116
1117	++coro_src->refcnt;
1118	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1119	}
1120		1465
1121	void	1466	void
1122	_exit (code)	1467	_exit (code)
1123	int code	1468	int code
1124	PROTOTYPE: $	1469	PROTOTYPE: $
1125	CODE:	1470	CODE:
1126	_exit (code);	1471	_exit (code);
1127		1472
1128	int	1473	int
		1474	cctx_stacksize (int new_stacksize = 0)
		1475	CODE:
		1476	RETVAL = coro_stacksize;
		1477	if (new_stacksize)
		1478	coro_stacksize = new_stacksize;
		1479	OUTPUT:
		1480	RETVAL
		1481
		1482	int
1129	cctx_count ()	1483	cctx_count ()
1130	CODE:	1484	CODE:
1131	RETVAL = cctx_count;	1485	RETVAL = cctx_count;
1132	OUTPUT:	1486	OUTPUT:
1133	RETVAL	1487	RETVAL
…		…
1137	CODE:	1491	CODE:
1138	RETVAL = cctx_idle;	1492	RETVAL = cctx_idle;
1139	OUTPUT:	1493	OUTPUT:
1140	RETVAL	1494	RETVAL
1141		1495
		1496	void
		1497	list ()
		1498	PPCODE:
		1499	{
		1500	struct coro *coro;
		1501	for (coro = coro_first; coro; coro = coro->next)
		1502	if (coro->hv)
		1503	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1504	}
		1505
		1506	void
		1507	call (Coro::State coro, SV *coderef)
		1508	ALIAS:
		1509	eval = 1
		1510	CODE:
		1511	{
		1512	if (coro->mainstack)
		1513	{
		1514	struct coro temp;
		1515	Zero (&temp, 1, struct coro);
		1516	temp.save = CORO_SAVE_ALL;
		1517
		1518	if (!(coro->flags & CF_RUNNING))
		1519	{
		1520	save_perl (aTHX_ &temp);
		1521	load_perl (aTHX_ coro);
		1522	}
		1523
		1524	{
		1525	dSP;
		1526	ENTER;
		1527	SAVETMPS;
		1528	PUSHMARK (SP);
		1529	PUTBACK;
		1530	if (ix)
		1531	eval_sv (coderef, 0);
		1532	else
		1533	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1534	SPAGAIN;
		1535	FREETMPS;
		1536	LEAVE;
		1537	PUTBACK;
		1538	}
		1539
		1540	if (!(coro->flags & CF_RUNNING))
		1541	{
		1542	save_perl (aTHX_ coro);
		1543	load_perl (aTHX_ &temp);
		1544	}
		1545	}
		1546	}
		1547
		1548	SV *
		1549	is_ready (Coro::State coro)
		1550	PROTOTYPE: $
		1551	ALIAS:
		1552	is_ready = CF_READY
		1553	is_running = CF_RUNNING
		1554	is_new = CF_NEW
		1555	is_destroyed = CF_DESTROYED
		1556	CODE:
		1557	RETVAL = boolSV (coro->flags & ix);
		1558	OUTPUT:
		1559	RETVAL
		1560
		1561	void
		1562	trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1563	CODE:
		1564	if (flags & CC_TRACE)
		1565	{
		1566	if (!coro->cctx)
		1567	coro->cctx = cctx_new ();
		1568	else if (!(coro->cctx->flags & CC_TRACE))
		1569	croak ("cannot enable tracing on coroutine with custom stack");
		1570
		1571	coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
		1572	}
		1573	else
		1574	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1575	{
		1576	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1577	coro->cctx->flags |= CC_NOREUSE;
		1578
		1579	if (coro->flags & CF_RUNNING)
		1580	PL_runops = RUNOPS_DEFAULT;
		1581	else
		1582	coro->runops = RUNOPS_DEFAULT;
		1583	}
		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	CODE:
		1605	RETVAL = coro_rss (coro);
		1606	OUTPUT:
		1607	RETVAL
		1608
		1609
1142	MODULE = Coro::State PACKAGE = Coro	1610	MODULE = Coro::State PACKAGE = Coro
1143		1611
1144	BOOT:	1612	BOOT:
1145	{	1613	{
1146	int i;	1614	int i;
		1615
		1616	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1617	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1618	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1619
		1620	coro_current = get_sv ("Coro::current", FALSE);
		1621	SvREADONLY_on (coro_current);
1147		1622
1148	coro_stash = gv_stashpv ("Coro", TRUE);	1623	coro_stash = gv_stashpv ("Coro", TRUE);
1149		1624
1150	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1625	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1151	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1626	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1152	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1627	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1153	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1628	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1154	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1629	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1155	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1630	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1156		1631
1157	coro_current = get_sv ("Coro::current", FALSE);
1158	SvREADONLY_on (coro_current);
1159
1160	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1632	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1161	coro_ready[i] = newAV ();	1633	coro_ready[i] = newAV ();
1162		1634
1163	{	1635	{
1164	SV *sv = perl_get_sv("Coro::API", 1);	1636	SV *sv = perl_get_sv("Coro::API", 1);
1165		1637
1166	coroapi.schedule = api_schedule;	1638	coroapi.schedule = api_schedule;
		1639	coroapi.save = api_save;
1167	coroapi.cede = api_cede;	1640	coroapi.cede = api_cede;
		1641	coroapi.cede_notself = api_cede_notself;
1168	coroapi.ready = api_ready;	1642	coroapi.ready = api_ready;
1169	coroapi.is_ready = api_is_ready;	1643	coroapi.is_ready = api_is_ready;
1170	coroapi.nready = &coro_nready;	1644	coroapi.nready = &coro_nready;
1171	coroapi.current = coro_current;	1645	coroapi.current = coro_current;
1172		1646
1173	GCoroAPI = &coroapi;	1647	GCoroAPI = &coroapi;
1174	sv_setiv (sv, (IV)&coroapi);	1648	sv_setiv (sv, (IV)&coroapi);
1175	SvREADONLY_on (sv);	1649	SvREADONLY_on (sv);
1176	}	1650	}
1177	}	1651	}
		1652
		1653	void
		1654	_set_current (SV *current)
		1655	PROTOTYPE: $
		1656	CODE:
		1657	SvREFCNT_dec (SvRV (coro_current));
		1658	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1178		1659
1179	int	1660	int
1180	prio (Coro::State coro, int newprio = 0)	1661	prio (Coro::State coro, int newprio = 0)
1181	ALIAS:	1662	ALIAS:
1182	nice = 1	1663	nice = 1
…		…
1185	RETVAL = coro->prio;	1666	RETVAL = coro->prio;
1186		1667
1187	if (items > 1)	1668	if (items > 1)
1188	{	1669	{
1189	if (ix)	1670	if (ix)
1190	newprio += coro->prio;	1671	newprio = coro->prio - newprio;
1191		1672
1192	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1673	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1193	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1674	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1194		1675
1195	coro->prio = newprio;	1676	coro->prio = newprio;
1196	}	1677	}
1197	}	1678	}
		1679	OUTPUT:
		1680	RETVAL
1198		1681
1199	SV *	1682	SV *
1200	ready (SV *self)	1683	ready (SV *self)
1201	PROTOTYPE: $	1684	PROTOTYPE: $
1202	CODE:	1685	CODE:
1203	RETVAL = boolSV (api_ready (self));	1686	RETVAL = boolSV (api_ready (self));
1204	OUTPUT:	1687	OUTPUT:
1205	RETVAL	1688	RETVAL
1206		1689
1207	SV *
1208	is_ready (SV *self)
1209	PROTOTYPE: $
1210	CODE:
1211	RETVAL = boolSV (api_is_ready (self));
1212	OUTPUT:
1213	RETVAL
1214
1215	int	1690	int
1216	nready (...)	1691	nready (...)
1217	PROTOTYPE:	1692	PROTOTYPE:
1218	CODE:	1693	CODE:
1219	RETVAL = coro_nready;	1694	RETVAL = coro_nready;
1220	OUTPUT:	1695	OUTPUT:
1221	RETVAL	1696	RETVAL
1222		1697
		1698	# for async_pool speedup
1223	void	1699	void
1224	_set_current (SV *current)	1700	_pool_1 (SV *cb)
1225	PROTOTYPE: $
1226	CODE:	1701	CODE:
1227	SvREFCNT_dec (SvRV (coro_current));	1702	{
1228	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1703	int i, len;
		1704	HV *hv = (HV *)SvRV (coro_current);
		1705	AV *defav = GvAV (PL_defgv);
		1706	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1707	AV *invoke_av;
		1708
		1709	if (!invoke)
		1710	croak ("\3terminate\2\n");
		1711
		1712	hv_store (hv, "desc", sizeof ("desc") - 1,
		1713	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1714
		1715	invoke_av = (AV *)SvRV (invoke);
		1716	len = av_len (invoke_av);
		1717
		1718	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1719
		1720	if (len > 0)
		1721	{
		1722	av_fill (defav, len - 1);
		1723	for (i = 0; i < len; ++i)
		1724	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1725	}
		1726
		1727	SvREFCNT_dec (invoke);
		1728	}
		1729
		1730	void
		1731	_pool_2 (SV *cb)
		1732	CODE:
		1733	{
		1734	struct coro *coro = SvSTATE (coro_current);
		1735
		1736	sv_setsv (cb, &PL_sv_undef);
		1737
		1738	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1739	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1740	croak ("\3terminate\2\n");
		1741
		1742	av_clear (GvAV (PL_defgv));
		1743	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1744	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1745	coro->save = CORO_SAVE_DEF;
		1746	coro->prio = 0;
		1747	av_push (av_async_pool, newSVsv (coro_current));
		1748	}
		1749
1229		1750
1230	MODULE = Coro::State PACKAGE = Coro::AIO	1751	MODULE = Coro::State PACKAGE = Coro::AIO
1231		1752
1232	SV *	1753	SV *
1233	_get_state ()	1754	_get_state ()
1234	CODE:	1755	CODE:
1235	{	1756	{
1236	struct {	1757	struct io_state *data;
1237	int errorno;
1238	int laststype;
1239	int laststatval;
1240	Stat_t statcache;
1241	} data;
1242		1758
		1759	RETVAL = newSV (sizeof (struct io_state));
		1760	data = (struct io_state *)SvPVX (RETVAL);
		1761	SvCUR_set (RETVAL, sizeof (struct io_state));
		1762	SvPOK_only (RETVAL);
		1763
1243	data.errorno = errno;	1764	data->errorno = errno;
1244	data.laststype = PL_laststype;	1765	data->laststype = PL_laststype;
1245	data.laststatval = PL_laststatval;	1766	data->laststatval = PL_laststatval;
1246	data.statcache = PL_statcache;	1767	data->statcache = PL_statcache;
1247
1248	RETVAL = newSVpvn ((char *)&data, sizeof data);
1249	}	1768	}
1250	OUTPUT:	1769	OUTPUT:
1251	RETVAL	1770	RETVAL
1252		1771
1253	void	1772	void
1254	_set_state (char *data_)	1773	_set_state (char *data_)
1255	PROTOTYPE: $	1774	PROTOTYPE: $
1256	CODE:	1775	CODE:
1257	{	1776	{
1258	struct {	1777	struct io_state *data = (void *)data_;
1259	int errorno;
1260	int laststype;
1261	int laststatval;
1262	Stat_t statcache;
1263	} *data = (void *)data_;
1264		1778
1265	errno = data->errorno;	1779	errno = data->errorno;
1266	PL_laststype = data->laststype;	1780	PL_laststype = data->laststype;
1267	PL_laststatval = data->laststatval;	1781	PL_laststatval = data->laststatval;
1268	PL_statcache = data->statcache;	1782	PL_statcache = data->statcache;
1269	}	1783	}
		1784

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