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Comparing Coro/Coro/State.xs (file contents):
Revision 1.111 by root, Thu Nov 30 18:21:14 2006 UTC vs.
Revision 1.173 by root, Sun Sep 30 13:41:45 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
74	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
76	* and should be unique. */	40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
79		97
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		99
82	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	103	#else
85	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
86	#endif	106	#endif
87		107
88	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
89		109
90	#include "CoroAPI.h"	110	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		111
94	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	116	#else
99	# define LOCK (void)0	117	# define LOCK (void)0
100	# define UNLOCK (void)0	118	# define UNLOCK (void)0
101	#endif	119	#endif
102		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
107		136
		137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
108	static struct coro_cctx *cctx_first;	142	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
110		153
111	/* this is a structure representing a c-level coroutine */	154	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	155	typedef struct coro_cctx {
113	struct coro_cctx *next;	156	struct coro_cctx *next;
114		157
115	/* the stack */	158	/* the stack */
116	void *sptr;	159	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	160	size_t ssize;
118		161
119	/* cpu state */	162	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	165	JMPENV *top_env;
122	coro_context cctx;	166	coro_context cctx;
123		167
124	int inuse;
125
126	#if USE_VALGRIND	168	#if CORO_USE_VALGRIND
127	int valgrind_id;	169	int valgrind_id;
128	#endif	170	#endif
		171	unsigned char flags;
129	} coro_cctx;	172	} coro_cctx;
130		173
131	enum {	174	enum {
132	CF_RUNNING, /* coroutine is running */	175	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	179	};
135		180
136	/* this is a structure representing a perl-level coroutine */	181	/* this is a structure representing a perl-level coroutine */
137	struct coro {	182	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	183	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	184	coro_cctx *cctx;
140		185
141	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
142	AV *args;	187	AV *args;
143	int refcnt;	188	int refcnt;
144	int flags;	189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
145		191
146	/* optionally saved, might be zero */	192	/* optionally saved, might be zero */
147	AV *defav;	193	AV *defav; /* @_ */
148	SV *defsv;	194	SV *defsv; /* $_ */
149	SV *errsv;	195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
150		199
151	#define VAR(name,type) type name;	200	#define VAR(name,type) type name;
152	# include "state.h"	201	# include "state.h"
153	#undef VAR	202	#undef VAR
154		203
		204	/* statistics */
		205	int usecount; /* number of switches to this coro */
		206
155	/* coro process data */	207	/* coro process data */
156	int prio;	208	int prio;
		209
		210	/* linked list */
		211	struct coro *next, *prev;
		212	HV *hv; /* the perl hash associated with this coro, if any */
157	};	213	};
158		214
159	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
161		217
		218	/** Coro ********************************************************************/
		219
		220	#define PRIO_MAX 3
		221	#define PRIO_HIGH 1
		222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/** lowlevel stuff **********************************************************/
		234
162	static AV *	235	static AV *
163	coro_clone_padlist (CV *cv)	236	coro_clone_padlist (pTHX_ CV *cv)
164	{	237	{
165	AV *padlist = CvPADLIST (cv);	238	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	239	AV *newpadlist, *newpad;
167		240
168	newpadlist = newAV ();	241	newpadlist = newAV ();
…		…
180		253
181	return newpadlist;	254	return newpadlist;
182	}	255	}
183		256
184	static void	257	static void
185	free_padlist (AV *padlist)	258	free_padlist (pTHX_ AV *padlist)
186	{	259	{
187	/* may be during global destruction */	260	/* may be during global destruction */
188	if (SvREFCNT (padlist))	261	if (SvREFCNT (padlist))
189	{	262	{
190	I32 i = AvFILLp (padlist);	263	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	284	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	285	AV *av = (AV *)mg->mg_obj;
213		286
214	/* casting is fun. */	287	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	288	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (padlist);	289	free_padlist (aTHX_ padlist);
217		290
218	SvREFCNT_dec (av);	291	SvREFCNT_dec (av);
219		292
220	return 0;	293	return 0;
221	}	294	}
…		…
229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230	? SvMAGIC (cv) \	303	? SvMAGIC (cv) \
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	305	: 0
233		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		332
234	/* the next two functions merely cache the padlists */	333	/* the next two functions merely cache the padlists */
235	static void	334	static void
236	get_padlist (CV *cv)	335	get_padlist (pTHX_ CV *cv)
237	{	336	{
238	MAGIC *mg = CORO_MAGIC (cv);	337	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	338	AV *av;
240		339
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	342	else
244	{	343	{
245	#if 0	344	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	345	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	346	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	347	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	348	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	349	SvREFCNT_dec (cp);
251	#else	350	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	352	#endif
254	}	353	}
255	}	354	}
256		355
257	static void	356	static void
258	put_padlist (CV *cv)	357	put_padlist (pTHX_ CV *cv)
259	{	358	{
260	MAGIC *mg = CORO_MAGIC (cv);	359	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	360	AV *av;
262		361
263	if (!mg)	362	if (!mg)
…		…
274	av_extend (av, AvMAX (av) + 1);	373	av_extend (av, AvMAX (av) + 1);
275		374
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	376	}
278		377
		378	/** load & save, init *******************************************************/
		379
279	#define SB do {	380	#define SB do {
280	#define SE } while (0)	381	#define SE } while (0)
281		382
282	#define LOAD(state) load_state((state));
283	#define SAVE(state,flags) save_state((state),(flags));
284
285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
286		384
287	static void	385	static void
288	load_state(Coro__State c)	386	load_perl (pTHX_ Coro__State c)
289	{	387	{
290	#define VAR(name,type) PL_ ## name = c->name;	388	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	389	# include "state.h"
292	#undef VAR	390	#undef VAR
293		391
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		400	{
		401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
		403	}
		404	else
		405	{
		406	REPLACE_SV (PL_rs, c->irssv);
		407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		408	sv_setsv (c->irssv_sv, PL_rs);
		409	}
		410	}
297		411
298	{	412	{
299	dSP;	413	dSP;
300	CV *cv;	414	CV *cv;
301		415
302	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
304	{	418	{
305	put_padlist (cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	420	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	421	CvPADLIST (cv) = (AV *)POPs;
308	}	422	}
309		423
310	PUTBACK;	424	PUTBACK;
311	}	425	}
312	}	426	}
313		427
314	static void	428	static void
315	save_state(Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
316	{	430	{
317	{	431	{
318	dSP;	432	dSP;
319	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	437	/*
324	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
326	*/	440	*/
327		441
328	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
330	for (;;)	444	for (;;)
331	{	445	{
332	while (cxix >= 0)	446	while (cxix >= 0)
333	{	447	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
335		449
336	if (CxTYPE(cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
337	{	451	{
338	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
339		453
340	if (CvDEPTH (cv))	454	if (CvDEPTH (cv))
341	{	455	{
342	EXTEND (SP, 3);	456	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	457	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
347		460
348	CvDEPTH (cv) = 0;	461	CvDEPTH (cv) = 0;
349	get_padlist (cv);	462	get_padlist (aTHX_ cv);
350	}	463	}
351	}	464	}
352	#ifdef CXt_FORMAT
353	else if (CxTYPE(cx) == CXt_FORMAT)
354	{
355	/* I never used formats, so how should I know how these are implemented? */
356	/* my bold guess is as a simple, plain sub... */
357	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358	}
359	#endif
360	}	465	}
361		466
362	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
363	break;	468	break;
364		469
365	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
366	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
367	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
368	}	473	}
369		474
370	PUTBACK;	475	PUTBACK;
371	}	476	}
372		477
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
376		483
377	#define VAR(name,type)c->name = PL_ ## name;	484	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	485	# include "state.h"
379	#undef VAR	486	#undef VAR
380	}	487	}
…		…
383	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	492	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	493	* not usually need a lot of stackspace.
387	*/	494	*/
		495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
388	static void	498	static void
389	coro_init_stacks ()	499	coro_init_stacks (pTHX)
390	{	500	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	501	PL_curstackinfo = new_stackinfo(64, 6);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		505
396	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		509
400	New(50,PL_tmps_stack,96,SV*);	510	New(50,PL_tmps_stack,64,SV*);
401	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	513	PL_tmps_max = 64;
404		514
405	New(54,PL_markstack,16,I32);	515	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	517	PL_markstack_max = PL_markstack + 16;
408		518
…		…
412		522
413	New(54,PL_scopestack,16,I32);	523	New(54,PL_scopestack,16,I32);
414	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	525	PL_scopestack_max = 16;
416		526
417	New(54,PL_savestack,96,ANY);	527	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	529	PL_savestack_max = 64;
420		530
421	#if !PERL_VERSION_ATLEAST (5,9,0)	531	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	532	New(54,PL_retstack,4,OP*);
423	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	534	PL_retstack_max = 4;
425	#endif	535	#endif
426	}	536	}
		537	#endif
427		538
428	/*	539	/*
429	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
430	*/	541	*/
431	static void	542	static void
432	coro_destroy_stacks ()	543	coro_destroy_stacks (pTHX)
433	{	544	{
434	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
435	{	546	{
436	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
437	LEAVE_SCOPE (0);	548	LEAVE_SCOPE (0);
		549	assert (PL_tmps_floor == -1);
438		550
439	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
440	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
441		554
		555	/* unwind all extra stacks */
442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
443	}	560	}
444		561
445	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
447		564
448	while (PL_curstackinfo)	565	while (PL_curstackinfo)
449	{	566	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
451		568
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		571
464	Safefree (PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	573	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	574	PL_curstackinfo = p;
467	}	575	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	581	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	582	Safefree (PL_retstack);
475	#endif	583	#endif
476	}	584	}
477		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/** coroutine stack handling ************************************************/
		618
478	static void	619	static void
479	setup_coro (struct coro *coro)	620	setup_coro (pTHX_ struct coro *coro)
480	{	621	{
481	/*	622	/*
482	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
483	*/	624	*/
484
485	coro_init_stacks ();	625	coro_init_stacks (aTHX);
486		626
		627	PL_runops = RUNOPS_DEFAULT;
		628	PL_curcop = &PL_compiling;
		629	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	630	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	631	PL_curpm = 0;
		632	PL_localizing = 0;
		633	PL_dirty = 0;
		634	PL_restartop = 0;
490		635
491	{	636	{
492	dSP;	637	dSP;
493	LOGOP myop;	638	LOGOP myop;
494		639
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));	640	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;	641	GvAV (PL_defgv) = coro->args; coro->args = 0;
500		642
501	Zero (&myop, 1, LOGOP);	643	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	644	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	645	myop.op_flags = OPf_WANT_VOID;
504		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
505	PL_op = (OP *)&myop;	650	PL_op = (OP *)&myop;
506
507	PUSHMARK (SP);
508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509	PUTBACK;
510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	652	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	653	}
		654
		655	ENTER; /* necessary e.g. for dounwind */
515	}	656	}
516		657
517	static void	658	static void
518	free_coro_mortal ()	659	free_coro_mortal (pTHX)
519	{	660	{
520	if (coro_mortal)	661	if (coro_mortal)
521	{	662	{
522	SvREFCNT_dec (coro_mortal);	663	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	664	coro_mortal = 0;
524	}	665	}
525	}	666	}
526		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (cctx->flags & CC_TRACE_ALL)
		681	{
		682	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		683	{
		684	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		685	SV **bot, **top;
		686	AV *av = newAV (); /* return values */
		687	SV **cb;
		688	dSP;
		689
		690	GV *gv = CvGV (cx->blk_sub.cv);
		691	SV *fullname = sv_2mortal (newSV (0));
		692	if (isGV (gv))
		693	gv_efullname3 (fullname, gv, 0);
		694
		695	bot = PL_stack_base + cx->blk_oldsp + 1;
		696	top = cx->blk_gimme == G_ARRAY ? SP + 1
		697	: cx->blk_gimme == G_SCALAR ? bot + 1
		698	: bot;
		699
		700	while (bot < top)
		701	av_push (av, SvREFCNT_inc (*bot++));
		702
		703	PL_runops = RUNOPS_DEFAULT;
		704	ENTER;
		705	SAVETMPS;
		706	EXTEND (SP, 3);
		707	PUSHMARK (SP);
		708	PUSHs (&PL_sv_no);
		709	PUSHs (fullname);
		710	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		711	PUTBACK;
		712	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		713	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		714	SPAGAIN;
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = runops_trace;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	runops_proc_t old_runops = PL_runops;
		735	dSP;
		736	GV *gv = CvGV (cx->blk_sub.cv);
		737	SV *fullname = sv_2mortal (newSV (0));
		738
		739	if (isGV (gv))
		740	gv_efullname3 (fullname, gv, 0);
		741
		742	PL_runops = RUNOPS_DEFAULT;
		743	ENTER;
		744	SAVETMPS;
		745	EXTEND (SP, 3);
		746	PUSHMARK (SP);
		747	PUSHs (&PL_sv_yes);
		748	PUSHs (fullname);
		749	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		750	PUTBACK;
		751	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		752	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		753	SPAGAIN;
		754	FREETMPS;
		755	LEAVE;
		756	PL_runops = runops_trace;
		757	}
		758
		759	oldcxix = cxstack_ix;
		760	}
		761
		762	if (cctx->flags & CC_TRACE_LINE)
		763	{
		764	dSP;
		765
		766	PL_runops = RUNOPS_DEFAULT;
		767	ENTER;
		768	SAVETMPS;
		769	EXTEND (SP, 3);
		770	PL_runops = RUNOPS_DEFAULT;
		771	PUSHMARK (SP);
		772	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		773	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		774	PUTBACK;
		775	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		776	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		777	SPAGAIN;
		778	FREETMPS;
		779	LEAVE;
		780	PL_runops = runops_trace;
		781	}
		782	}
		783	}
		784	}
		785	}
		786
		787	TAINT_NOT;
		788	return 0;
		789	}
		790
		791	/* inject a fake call to Coro::State::_cctx_init into the execution */
		792	/* _cctx_init should be careful, as it could be called at almost any time */
		793	/* during execution of a perl program */
527	static void NOINLINE	794	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	795	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	796	{
530	dSP;	797	dSP;
531	LOGOP myop;	798	LOGOP myop;
532		799
		800	PL_top_env = &PL_start_env;
		801
		802	if (cctx->flags & CC_TRACE)
		803	PL_runops = runops_trace;
		804
533	Zero (&myop, 1, LOGOP);	805	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	806	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	807	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		808
539	PUSHMARK (SP);	809	PUSHMARK (SP);
		810	EXTEND (SP, 2);
		811	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	812	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	813	PUTBACK;
		814	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	815	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	816	SPAGAIN;
544	}	817	}
545		818
		819	/*
		820	* this is a _very_ stripped down perl interpreter ;)
		821	*/
546	static void	822	static void
547	coro_run (void *arg)	823	coro_run (void *arg)
548	{	824	{
		825	dTHX;
		826
549	/* coro_run is the alternative epilogue of transfer() */	827	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	828	UNLOCK;
551		829
		830	/* we now skip the entersub that lead to transfer() */
		831	PL_op = PL_op->op_next;
		832
		833	/* inject a fake subroutine call to cctx_init */
		834	prepare_cctx (aTHX_ (coro_cctx *)arg);
		835
		836	/* somebody or something will hit me for both perl_run and PL_restartop */
		837	PL_restartop = PL_op;
		838	perl_run (PL_curinterp);
		839
552	/*	840	/*
553	* this is a _very_ stripped down perl interpreter ;)	841	* If perl-run returns we assume exit() was being called or the coro
		842	* fell off the end, which seems to be the only valid (non-bug)
		843	* reason for perl_run to return. We try to exit by jumping to the
		844	* bootstrap-time "top" top_env, as we cannot restore the "main"
		845	* coroutine as Coro has no such concept
554	*/	846	*/
555	PL_top_env = &PL_start_env;	847	PL_top_env = main_top_env;
556		848	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
557	/* inject call to cctx_init */
558	prepare_cctx ((coro_cctx *)arg);
559
560	/* somebody will hit me for both perl_run and PL_restartop */
561	perl_run (PL_curinterp);
562
563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564	abort ();
565	}	849	}
566		850
567	static coro_cctx *	851	static coro_cctx *
568	cctx_new ()	852	cctx_new ()
569	{	853	{
570	coro_cctx *cctx;	854	coro_cctx *cctx;
		855	void *stack_start;
		856	size_t stack_size;
571		857
572	++cctx_count;	858	++cctx_count;
573		859
574	New (0, cctx, 1, coro_cctx);	860	Newz (0, cctx, 1, coro_cctx);
575		861
576	#if HAVE_MMAP	862	#if HAVE_MMAP
577		863
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	864	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	865	/* mmap supposedly does allocate-on-write for us */
580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	866	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581		867
582	if (cctx->sptr == (void *)-1)	868	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	869	{
587
588	# if STACKGUARD	870	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	871	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	872	# endif
		873	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		874	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		875	cctx->flags |= CC_MAPPED;
		876	}
		877	else
		878	#endif
		879	{
		880	cctx->ssize = coro_stacksize * (long)sizeof (long);
		881	New (0, cctx->sptr, coro_stacksize, long);
591		882
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	883	if (!cctx->sptr)
598	{	884	{
599	perror ("FATAL: unable to malloc stack for coroutine");	885	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	886	_exit (EXIT_FAILURE);
601	}	887	}
602		888
603	#endif	889	stack_start = cctx->sptr;
		890	stack_size = cctx->ssize;
		891	}
604		892
605	#if USE_VALGRIND	893	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608	cctx->ssize + (char *)cctx->sptr
609	);
610	#endif
611
612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	894	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
613		895
614	return cctx;	896	return cctx;
615	}	897	}
616		898
617	static void	899	static void
618	cctx_free (coro_cctx *cctx)	900	cctx_destroy (coro_cctx *cctx)
619	{	901	{
620	if (!cctx)	902	if (!cctx)
621	return;	903	return;
622		904
623	--cctx_count;	905	--cctx_count;
624		906
625	#if USE_VALGRIND	907	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	908	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	909	#endif
628		910
629	#if HAVE_MMAP	911	#if HAVE_MMAP
		912	if (cctx->flags & CC_MAPPED)
630	munmap (cctx->sptr, cctx->ssize);	913	munmap (cctx->sptr, cctx->ssize);
631	#else	914	else
		915	#endif
632	Safefree (cctx->sptr);	916	Safefree (cctx->sptr);
633	#endif
634		917
635	Safefree (cctx);	918	Safefree (cctx);
636	}	919	}
637		920
638	static coro_cctx *	921	static coro_cctx *
639	cctx_get ()	922	cctx_get (pTHX)
640	{	923	{
641	coro_cctx *cctx;
642
643	if (cctx_first)	924	while (cctx_first)
644	{	925	{
		926	coro_cctx *cctx = cctx_first;
		927	cctx_first = cctx->next;
645	--cctx_idle;	928	--cctx_idle;
646	cctx = cctx_first;	929
647	cctx_first = cctx->next;	930	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
648	}	931	return cctx;
649	else	932
650	{	933	cctx_destroy (cctx);
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;
653	}	934	}
654		935
655	return cctx;	936	return cctx_new ();
656	}	937	}
657		938
658	static void	939	static void
659	cctx_put (coro_cctx *cctx)	940	cctx_put (coro_cctx *cctx)
660	{	941	{
		942	/* free another cctx if overlimit */
		943	if (cctx_idle >= MAX_IDLE_CCTX)
		944	{
		945	coro_cctx *first = cctx_first;
		946	cctx_first = first->next;
		947	--cctx_idle;
		948
		949	cctx_destroy (first);
		950	}
		951
661	++cctx_idle;	952	++cctx_idle;
662	cctx->next = cctx_first;	953	cctx->next = cctx_first;
663	cctx_first = cctx;	954	cctx_first = cctx;
664	}	955	}
665		956
666	/* never call directly, always through the coro_state_transfer global variable */	957	/** coroutine switching *****************************************************/
		958
667	static void NOINLINE	959	static void NOINLINE
		960	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		961	{
		962	if (prev != next)
		963	{
		964	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		965	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		966
		967	if (next->flags & CF_RUNNING)
		968	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		969
		970	if (next->flags & CF_DESTROYED)
		971	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		972
		973	if (PL_lex_state != LEX_NOTPARSING)
		974	croak ("Coro::State::transfer called while parsing, but this is not supported");
		975	}
		976	}
		977
		978	/* always use the TRANSFER macro */
		979	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	980	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	981	{
670	dSTACKLEVEL;	982	dSTACKLEVEL;
671		983
672	/* sometimes transfer is only called to set idle_sp */	984	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	985	if (!next)
		986	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	987	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		988	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		989	}
675	else if (prev != next)	990	else if (prev != next)
676	{	991	{
677	coro_cctx *prev__cctx;	992	coro_cctx *prev__cctx;
678		993
679	if (!prev->cctx)	994	if (prev->flags & CF_NEW)
680	{	995	{
681	/* create a new empty context */	996	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	997	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	998	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	999	prev->flags |= CF_RUNNING;
685	}	1000	}
686
687	assert ( prev->flags & CF_RUNNING);
688	assert (!next->flags & CF_RUNNING);
689		1001
690	prev->flags &= ~CF_RUNNING;	1002	prev->flags &= ~CF_RUNNING;
691	next->flags |= CF_RUNNING;	1003	next->flags |= CF_RUNNING;
692		1004
693	LOCK;	1005	LOCK;
694		1006
695	if (next->mainstack)	1007	if (next->flags & CF_NEW)
696	{	1008	{
697	/* coroutine already started */	1009	/* need to start coroutine */
698	SAVE (prev, flags);	1010	next->flags &= ~CF_NEW;
699	LOAD (next);	1011	/* first get rid of the old state */
		1012	save_perl (aTHX_ prev);
		1013	/* setup coroutine call */
		1014	setup_coro (aTHX_ next);
700	}	1015	}
701	else	1016	else
702	{	1017	{
703	/* need to start coroutine */	1018	/* coroutine already started */
704	/* first get rid of the old state */	1019	save_perl (aTHX_ prev);
705	SAVE (prev, -1);	1020	load_perl (aTHX_ next);
706	/* setup coroutine call */
707	setup_coro (next);
708	/* need a stack */
709	assert (!next->stack);
710	next->cctx = 0;
711	}	1021	}
712		1022
713	prev__cctx = prev->cctx;	1023	prev__cctx = prev->cctx;
714		1024
715	/* possibly "free" the cctx */	1025	/* possibly "free" the cctx */
716	if (prev__cctx->idle_sp == STACKLEVEL)	1026	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
717	{	1027	{
718	assert (PL_top_env == prev__cctx->top_env);//D	1028	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1029	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1030
		1031	prev->cctx = 0;
		1032
719	cctx_put (prev__cctx);	1033	cctx_put (prev__cctx);
720	prev->cctx = 0;
721	}	1034	}
722		1035
		1036	++next->usecount;
		1037
723	if (!next->cctx)	1038	if (!next->cctx)
724	next->cctx = cctx_get ();	1039	next->cctx = cctx_get (aTHX);
725		1040
726	if (prev__cctx != next->cctx)	1041	if (prev__cctx != next->cctx)
727	{	1042	{
728	assert ( prev__cctx->inuse);
729	assert (!next->cctx->inuse);
730
731	prev__cctx->inuse = 0;
732	next->cctx->inuse = 1;
733
734	prev__cctx->top_env = PL_top_env;	1043	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->cctx->top_env;	1044	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1045	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	1046	}
738		1047
739	free_coro_mortal ();	1048	free_coro_mortal (aTHX);
740
741	UNLOCK;	1049	UNLOCK;
742	}	1050	}
743	}	1051	}
744		1052
745	struct transfer_args	1053	struct transfer_args
746	{	1054	{
747	struct coro *prev, *next;	1055	struct coro *prev, *next;
748	int flags;
749	};	1056	};
750		1057
751	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1058	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1059	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
752		1060
		1061	/** high level stuff ********************************************************/
		1062
753	static void	1063	static int
754	coro_state_destroy (struct coro *coro)	1064	coro_state_destroy (pTHX_ struct coro *coro)
755	{	1065	{
756	if (coro->refcnt--)	1066	if (coro->flags & CF_DESTROYED)
757	return;	1067	return 0;
		1068
		1069	coro->flags |= CF_DESTROYED;
		1070
		1071	if (coro->flags & CF_READY)
		1072	{
		1073	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1074	/* alternative: look through all ready queues and remove the coro */
		1075	LOCK;
		1076	--coro_nready;
		1077	UNLOCK;
		1078	}
		1079	else
		1080	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
758		1081
759	if (coro->mainstack && coro->mainstack != main_mainstack)	1082	if (coro->mainstack && coro->mainstack != main_mainstack)
760	{	1083	{
761	struct coro temp;	1084	struct coro temp;
762		1085
763	SAVE ((&temp), TRANSFER_SAVE_ALL);	1086	assert (!(coro->flags & CF_RUNNING));
764	LOAD (coro);
765		1087
		1088	Zero (&temp, 1, struct coro);
		1089	temp.save = CORO_SAVE_ALL;
		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
		1096
766	coro_destroy_stacks ();	1097	coro_destroy_stacks (aTHX);
767		1098
768	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
769		1100
770	coro->mainstack = 0;	1101	coro->mainstack = 0;
771	}	1102	}
772		1103
773	cctx_free (coro->cctx);	1104	cctx_destroy (coro->cctx);
774	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
775	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;
776	}	1112	}
777		1113
778	static int	1114	static int
779	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
780	{	1116	{
781	struct coro *coro = (struct coro *)mg->mg_ptr;	1117	struct coro *coro = (struct coro *)mg->mg_ptr;
782	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
783		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
784	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
785		1127
786	return 0;	1128	return 0;
787	}	1129	}
788		1130
789	static int	1131	static int
…		…
796	return 0;	1138	return 0;
797	}	1139	}
798		1140
799	static MGVTBL coro_state_vtbl = {	1141	static MGVTBL coro_state_vtbl = {
800	0, 0, 0, 0,	1142	0, 0, 0, 0,
801	coro_state_clear,	1143	coro_state_free,
802	0,	1144	0,
803	#ifdef MGf_DUP	1145	#ifdef MGf_DUP
804	coro_state_dup,	1146	coro_state_dup,
805	#else	1147	#else
806	# define MGf_DUP 0	1148	# define MGf_DUP 0
807	#endif	1149	#endif
808	};	1150	};
809		1151
810	static struct coro *
811	SvSTATE (SV *coro)
812	{
813	HV *stash;
814	MAGIC *mg;
815
816	if (SvROK (coro))
817	coro = SvRV (coro);
818
819	stash = SvSTASH (coro);
820	if (stash != coro_stash && stash != coro_state_stash)
821	{
822	/* very slow, but rare, check */
823	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
824	croak ("Coro::State object required");
825	}
826
827	mg = SvMAGIC (coro);
828	assert (mg->mg_type == PERL_MAGIC_ext);
829	return (struct coro *)mg->mg_ptr;
830	}
831
832	static void	1152	static void
833	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)
834	{	1154	{
835	ta->prev = SvSTATE (prev);	1155	ta->prev = SvSTATE (prev_sv);
836	ta->next = SvSTATE (next);	1156	ta->next = SvSTATE (next_sv);
837	ta->flags = flags;	1157	TRANSFER_CHECK (*ta);
838	}	1158	}
839		1159
840	static void	1160	static void
841	api_transfer (SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
842	{	1162	{
843	dTHX;	1163	dTHX;
844	struct transfer_args ta;	1164	struct transfer_args ta;
845		1165
846	prepare_transfer (&ta, prev, next, flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
847	TRANSFER (ta);	1167	TRANSFER (ta);
848	}	1168	}
849		1169
		1170	static int
		1171	api_save (SV *coro_sv, int new_save)
		1172	{
		1173	dTHX;
		1174	struct coro *coro = SvSTATE (coro_sv);
		1175	int old_save = coro->save;
		1176
		1177	if (new_save >= 0)
		1178	coro->save = new_save;
		1179
		1180	return old_save;
		1181	}
		1182
850	/** Coro ********************************************************************/	1183	/** Coro ********************************************************************/
851		1184
852	#define PRIO_MAX 3
853	#define PRIO_HIGH 1
854	#define PRIO_NORMAL 0
855	#define PRIO_LOW -1
856	#define PRIO_IDLE -3
857	#define PRIO_MIN -4
858
859	/* for Coro.pm */
860	static GV *coro_current, *coro_idle;
861	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
862	static int coro_nready;
863
864	static void	1185	static void
865	coro_enq (SV *sv)	1186	coro_enq (pTHX_ SV *coro_sv)
866	{	1187	{
867	int prio;
868
869	if (SvTYPE (sv) != SVt_PVHV)
870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
871
872	prio = SvSTATE (sv)->prio;
873
874	av_push (coro_ready [prio - PRIO_MIN], sv);	1188	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875	coro_nready++;
876	}	1189	}
877		1190
878	static SV *	1191	static SV *
879	coro_deq (int min_prio)	1192	coro_deq (pTHX_ int min_prio)
880	{	1193	{
881	int prio = PRIO_MAX - PRIO_MIN;	1194	int prio = PRIO_MAX - PRIO_MIN;
882		1195
883	min_prio -= PRIO_MIN;	1196	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1197	if (min_prio < 0)
885	min_prio = 0;	1198	min_prio = 0;
886		1199
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1200	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (AvFILLp (coro_ready [prio]) >= 0)	1201	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready [prio]);	1202	return av_shift (coro_ready [prio]);
892	}
893		1203
894	return 0;	1204	return 0;
895	}	1205	}
896		1206
897	static int	1207	static int
898	api_ready (SV *coro_sv)	1208	api_ready (SV *coro_sv)
899	{	1209	{
		1210	dTHX;
900	struct coro *coro;	1211	struct coro *coro;
901		1212
902	if (SvROK (coro_sv))	1213	if (SvROK (coro_sv))
903	coro_sv = SvRV (coro_sv);	1214	coro_sv = SvRV (coro_sv);
904		1215
905	coro = SvSTATE (coro_sv);	1216	coro = SvSTATE (coro_sv);
		1217
906	if (coro->flags & CF_READY)	1218	if (coro->flags & CF_READY)
907	return 0;	1219	return 0;
908		1220
909	coro->flags |= CF_READY;	1221	coro->flags |= CF_READY;
910		1222
911	LOCK;	1223	LOCK;
912	coro_enq (SvREFCNT_inc (coro_sv));	1224	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1225	++coro_nready;
913	UNLOCK;	1226	UNLOCK;
914		1227
915	return 1;	1228	return 1;
916	}	1229	}
917		1230
918	static int	1231	static int
919	api_is_ready (SV *coro_sv)	1232	api_is_ready (SV *coro_sv)
920	{	1233	{
921	struct coro *coro;	1234	dTHX;
922
923	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1235	return !!(SvSTATE (coro_sv)->flags & CF_READY);
924	}	1236	}
925		1237
926	static void	1238	static void
927	prepare_schedule (struct transfer_args *ta)	1239	prepare_schedule (pTHX_ struct transfer_args *ta)
928	{	1240	{
929	SV *current, *prev, *next;	1241	SV *prev_sv, *next_sv;
930
931	current = GvSV (coro_current);
932		1242
933	for (;;)	1243	for (;;)
934	{	1244	{
935	LOCK;	1245	LOCK;
936	next = coro_deq (PRIO_MIN);	1246	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1247
		1248	/* nothing to schedule: call the idle handler */
		1249	if (!next_sv)
		1250	{
		1251	dSP;
		1252	UNLOCK;
		1253
		1254	ENTER;
		1255	SAVETMPS;
		1256
		1257	PUSHMARK (SP);
		1258	PUTBACK;
		1259	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1260
		1261	FREETMPS;
		1262	LEAVE;
		1263	continue;
		1264	}
		1265
		1266	ta->next = SvSTATE (next_sv);
		1267
		1268	/* cannot transfer to destroyed coros, skip and look for next */
		1269	if (ta->next->flags & CF_DESTROYED)
		1270	{
		1271	UNLOCK;
		1272	SvREFCNT_dec (next_sv);
		1273	/* coro_nready is already taken care of by destroy */
		1274	continue;
		1275	}
		1276
		1277	--coro_nready;
937	UNLOCK;	1278	UNLOCK;
938
939	if (next)
940	break;	1279	break;
941
942	{
943	dSP;
944
945	ENTER;
946	SAVETMPS;
947
948	PUSHMARK (SP);
949	PUTBACK;
950	call_sv (GvSV (coro_idle), G_DISCARD);
951
952	FREETMPS;
953	LEAVE;
954	}	1280	}
955	}
956
957	prev = SvRV (current);
958	SvRV (current) = next;
959		1281
960	/* free this only after the transfer */	1282	/* free this only after the transfer */
		1283	prev_sv = SvRV (coro_current);
		1284	ta->prev = SvSTATE (prev_sv);
		1285	TRANSFER_CHECK (*ta);
		1286	assert (ta->next->flags & CF_READY);
		1287	ta->next->flags &= ~CF_READY;
		1288	SvRV_set (coro_current, next_sv);
		1289
961	LOCK;	1290	LOCK;
962	free_coro_mortal ();	1291	free_coro_mortal (aTHX);
		1292	coro_mortal = prev_sv;
963	UNLOCK;	1293	UNLOCK;
964	coro_mortal = prev;
965
966	ta->prev = SvSTATE (prev);
967	ta->next = SvSTATE (next);
968	ta->flags = TRANSFER_SAVE_ALL;
969
970	ta->next->flags &= ~CF_READY;
971	}	1294	}
972		1295
973	static void	1296	static void
974	prepare_cede (struct transfer_args *ta)	1297	prepare_cede (pTHX_ struct transfer_args *ta)
975	{	1298	{
976	api_ready (GvSV (coro_current));	1299	api_ready (coro_current);
977
978	prepare_schedule (ta);	1300	prepare_schedule (aTHX_ ta);
		1301	}
		1302
		1303	static int
		1304	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1305	{
		1306	if (coro_nready)
		1307	{
		1308	SV *prev = SvRV (coro_current);
		1309	prepare_schedule (aTHX_ ta);
		1310	api_ready (prev);
		1311	return 1;
		1312	}
		1313	else
		1314	return 0;
979	}	1315	}
980		1316
981	static void	1317	static void
982	api_schedule (void)	1318	api_schedule (void)
983	{	1319	{
984	dTHX;	1320	dTHX;
985	struct transfer_args ta;	1321	struct transfer_args ta;
986		1322
987	prepare_schedule (&ta);	1323	prepare_schedule (aTHX_ &ta);
988	TRANSFER (ta);	1324	TRANSFER (ta);
989	}	1325	}
990		1326
991	static void	1327	static int
992	api_cede (void)	1328	api_cede (void)
993	{	1329	{
994	dTHX;	1330	dTHX;
995	struct transfer_args ta;	1331	struct transfer_args ta;
996		1332
997	prepare_cede (&ta);	1333	prepare_cede (aTHX_ &ta);
		1334
		1335	if (ta.prev != ta.next)
		1336	{
998	TRANSFER (ta);	1337	TRANSFER (ta);
		1338	return 1;
		1339	}
		1340	else
		1341	return 0;
999	}	1342	}
1000		1343
		1344	static int
		1345	api_cede_notself (void)
		1346	{
		1347	dTHX;
		1348	struct transfer_args ta;
		1349
		1350	if (prepare_cede_notself (aTHX_ &ta))
		1351	{
		1352	TRANSFER (ta);
		1353	return 1;
		1354	}
		1355	else
		1356	return 0;
		1357	}
		1358
		1359	static void
		1360	api_trace (struct coro *coro, int flags)
		1361	{
		1362	dTHX;
		1363
		1364	if (flags & CC_TRACE)
		1365	{
		1366	if (!coro->cctx)
		1367	coro->cctx = cctx_new ();
		1368	else if (!(coro->cctx->flags & CC_TRACE))
		1369	croak ("cannot enable tracing on coroutine with custom stack");
		1370
		1371	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1372	}
		1373	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1374	{
		1375	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1376
		1377	if (coro->flags & CF_RUNNING)
		1378	PL_runops = RUNOPS_DEFAULT;
		1379	else
		1380	coro->runops = RUNOPS_DEFAULT;
		1381	}
		1382	}
		1383
1001	MODULE = Coro::State PACKAGE = Coro::State	1384	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1002		1385
1003	PROTOTYPES: DISABLE	1386	PROTOTYPES: DISABLE
1004		1387
1005	BOOT:	1388	BOOT:
1006	{	1389	{
…		…
1009	#endif	1392	#endif
1010	BOOT_PAGESIZE;	1393	BOOT_PAGESIZE;
1011		1394
1012	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1395	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1013		1396
		1397	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1400	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1401
1014	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1402	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1015	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1403	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1016	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1404	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1405	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1406	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1407	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1408	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1017		1409
1018	main_mainstack = PL_mainstack;	1410	main_mainstack = PL_mainstack;
		1411	main_top_env = PL_top_env;
		1412
		1413	while (main_top_env->je_prev)
		1414	main_top_env = main_top_env->je_prev;
1019		1415
1020	coroapi.ver = CORO_API_VERSION;	1416	coroapi.ver = CORO_API_VERSION;
1021	coroapi.transfer = api_transfer;	1417	coroapi.transfer = api_transfer;
1022		1418
1023	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1419	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1031	HV *hv;	1427	HV *hv;
1032	int i;	1428	int i;
1033		1429
1034	Newz (0, coro, 1, struct coro);	1430	Newz (0, coro, 1, struct coro);
1035	coro->args = newAV ();	1431	coro->args = newAV ();
		1432	coro->save = CORO_SAVE_DEF;
		1433	coro->flags = CF_NEW;
1036		1434
		1435	if (coro_first) coro_first->prev = coro;
		1436	coro->next = coro_first;
		1437	coro_first = coro;
		1438
1037	hv = newHV ();	1439	coro->hv = hv = newHV ();
1038	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1440	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1039	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1441	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1040		1442
1041	for (i = 1; i < items; i++)	1443	for (i = 1; i < items; i++)
1042	av_push (coro->args, newSVsv (ST (i)));	1444	av_push (coro->args, newSVsv (ST (i)));
1043	}	1445	}
1044	OUTPUT:	1446	OUTPUT:
		1447	RETVAL
		1448
		1449	int
		1450	save (SV *coro, int new_save = -1)
		1451	CODE:
		1452	RETVAL = api_save (coro, new_save);
		1453	OUTPUT:
		1454	RETVAL
		1455
		1456	int
		1457	save_also (SV *coro_sv, int save_also)
		1458	CODE:
		1459	{
		1460	struct coro *coro = SvSTATE (coro_sv);
		1461	RETVAL = coro->save;
		1462	coro->save |= save_also;
		1463	}
		1464	OUTPUT:
1045	RETVAL	1465	RETVAL
1046		1466
1047	void	1467	void
1048	_set_stacklevel (...)	1468	_set_stacklevel (...)
1049	ALIAS:	1469	ALIAS:
1050	Coro::State::transfer = 1	1470	Coro::State::transfer = 1
1051	Coro::schedule = 2	1471	Coro::schedule = 2
1052	Coro::cede = 3	1472	Coro::cede = 3
1053	Coro::Cont::yield = 4	1473	Coro::cede_notself = 4
1054	CODE:	1474	CODE:
1055	{	1475	{
1056	struct transfer_args ta;	1476	struct transfer_args ta;
1057		1477
1058	switch (ix)	1478	switch (ix)
1059	{	1479	{
1060	case 0:	1480	case 0:
1061	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1481	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1062	ta.next = 0;	1482	ta.next = 0;
1063	ta.flags = TRANSFER_SET_STACKLEVEL;
1064	break;	1483	break;
1065		1484
1066	case 1:	1485	case 1:
1067	if (items != 3)	1486	if (items != 2)
1068	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1487	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1069		1488
1070	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1489	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1071	break;	1490	break;
1072		1491
1073	case 2:	1492	case 2:
1074	prepare_schedule (&ta);	1493	prepare_schedule (aTHX_ &ta);
1075	break;	1494	break;
1076		1495
1077	case 3:	1496	case 3:
1078	prepare_cede (&ta);	1497	prepare_cede (aTHX_ &ta);
1079	break;	1498	break;
1080		1499
1081	case 4:	1500	case 4:
1082	{	1501	if (!prepare_cede_notself (aTHX_ &ta))
1083	SV *yieldstack;	1502	XSRETURN_EMPTY;
1084	SV *sv;
1085	AV *defav = GvAV (PL_defgv);
1086		1503
1087	yieldstack = *hv_fetch (
1088	(HV *)SvRV (GvSV (coro_current)),
1089	"yieldstack", sizeof ("yieldstack") - 1,
1090	0
1091	);
1092
1093	/* set up @_ -- ugly */
1094	av_clear (defav);
1095	av_fill (defav, items - 1);
1096	while (items--)
1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099	sv = av_pop ((AV *)SvRV (yieldstack));
1100	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102	ta.flags = 0;
1103	SvREFCNT_dec (sv);
1104	}
1105	break;	1504	break;
1106
1107	}	1505	}
1108		1506
		1507	BARRIER;
1109	TRANSFER (ta);	1508	TRANSFER (ta);
1110	}
1111		1509
1112	void	1510	if (GIMME_V != G_VOID && ta.next != ta.prev)
1113	_clone_state_from (SV *dst, SV *src)	1511	XSRETURN_YES;
		1512	}
		1513
		1514	bool
		1515	_destroy (SV *coro_sv)
1114	CODE:	1516	CODE:
1115	{	1517	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1116	struct coro *coro_src = SvSTATE (src);	1518	OUTPUT:
1117		1519	RETVAL
1118	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1119
1120	++coro_src->refcnt;
1121	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1122	}
1123		1520
1124	void	1521	void
1125	_exit (code)	1522	_exit (code)
1126	int code	1523	int code
1127	PROTOTYPE: $	1524	PROTOTYPE: $
1128	CODE:	1525	CODE:
1129	_exit (code);	1526	_exit (code);
1130		1527
1131	int	1528	int
		1529	cctx_stacksize (int new_stacksize = 0)
		1530	CODE:
		1531	RETVAL = coro_stacksize;
		1532	if (new_stacksize)
		1533	coro_stacksize = new_stacksize;
		1534	OUTPUT:
		1535	RETVAL
		1536
		1537	int
1132	cctx_count ()	1538	cctx_count ()
1133	CODE:	1539	CODE:
1134	RETVAL = cctx_count;	1540	RETVAL = cctx_count;
1135	OUTPUT:	1541	OUTPUT:
1136	RETVAL	1542	RETVAL
…		…
1140	CODE:	1546	CODE:
1141	RETVAL = cctx_idle;	1547	RETVAL = cctx_idle;
1142	OUTPUT:	1548	OUTPUT:
1143	RETVAL	1549	RETVAL
1144		1550
		1551	void
		1552	list ()
		1553	PPCODE:
		1554	{
		1555	struct coro *coro;
		1556	for (coro = coro_first; coro; coro = coro->next)
		1557	if (coro->hv)
		1558	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1559	}
		1560
		1561	void
		1562	call (Coro::State coro, SV *coderef)
		1563	ALIAS:
		1564	eval = 1
		1565	CODE:
		1566	{
		1567	if (coro->mainstack)
		1568	{
		1569	struct coro temp;
		1570	Zero (&temp, 1, struct coro);
		1571	temp.save = CORO_SAVE_ALL;
		1572
		1573	if (!(coro->flags & CF_RUNNING))
		1574	{
		1575	save_perl (aTHX_ &temp);
		1576	load_perl (aTHX_ coro);
		1577	}
		1578
		1579	{
		1580	dSP;
		1581	ENTER;
		1582	SAVETMPS;
		1583	PUSHMARK (SP);
		1584	PUTBACK;
		1585	if (ix)
		1586	eval_sv (coderef, 0);
		1587	else
		1588	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1589	SPAGAIN;
		1590	FREETMPS;
		1591	LEAVE;
		1592	PUTBACK;
		1593	}
		1594
		1595	if (!(coro->flags & CF_RUNNING))
		1596	{
		1597	save_perl (aTHX_ coro);
		1598	load_perl (aTHX_ &temp);
		1599	}
		1600	}
		1601	}
		1602
		1603	SV *
		1604	is_ready (Coro::State coro)
		1605	PROTOTYPE: $
		1606	ALIAS:
		1607	is_ready = CF_READY
		1608	is_running = CF_RUNNING
		1609	is_new = CF_NEW
		1610	is_destroyed = CF_DESTROYED
		1611	CODE:
		1612	RETVAL = boolSV (coro->flags & ix);
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	void
		1617	api_trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1618
		1619	SV *
		1620	has_stack (Coro::State coro)
		1621	PROTOTYPE: $
		1622	CODE:
		1623	RETVAL = boolSV (!!coro->cctx);
		1624	OUTPUT:
		1625	RETVAL
		1626
		1627	int
		1628	is_traced (Coro::State coro)
		1629	PROTOTYPE: $
		1630	CODE:
		1631	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1632	OUTPUT:
		1633	RETVAL
		1634
		1635	IV
		1636	rss (Coro::State coro)
		1637	PROTOTYPE: $
		1638	ALIAS:
		1639	usecount = 1
		1640	CODE:
		1641	switch (ix)
		1642	{
		1643	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1644	case 1: RETVAL = coro->usecount; break;
		1645	}
		1646	OUTPUT:
		1647	RETVAL
		1648
		1649
1145	MODULE = Coro::State PACKAGE = Coro	1650	MODULE = Coro::State PACKAGE = Coro
1146		1651
1147	BOOT:	1652	BOOT:
1148	{	1653	{
1149	int i;	1654	int i;
		1655
		1656	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1657	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1658	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1659
		1660	coro_current = get_sv ("Coro::current", FALSE);
		1661	SvREADONLY_on (coro_current);
1150		1662
1151	coro_stash = gv_stashpv ("Coro", TRUE);	1663	coro_stash = gv_stashpv ("Coro", TRUE);
1152		1664
1153	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1665	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1154	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1666	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1155	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1667	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1156	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1668	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1157	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1669	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1158	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1670	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1159		1671
1160	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1161	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1162
1163	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1672	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1164	coro_ready[i] = newAV ();	1673	coro_ready[i] = newAV ();
1165		1674
1166	{	1675	{
1167	SV *sv = perl_get_sv("Coro::API", 1);	1676	SV *sv = perl_get_sv("Coro::API", 1);
1168		1677
1169	coroapi.schedule = api_schedule;	1678	coroapi.schedule = api_schedule;
		1679	coroapi.save = api_save;
1170	coroapi.cede = api_cede;	1680	coroapi.cede = api_cede;
		1681	coroapi.cede_notself = api_cede_notself;
1171	coroapi.ready = api_ready;	1682	coroapi.ready = api_ready;
1172	coroapi.is_ready = api_is_ready;	1683	coroapi.is_ready = api_is_ready;
1173	coroapi.nready = &coro_nready;	1684	coroapi.nready = &coro_nready;
1174	coroapi.current = coro_current;	1685	coroapi.current = coro_current;
1175		1686
1176	GCoroAPI = &coroapi;	1687	GCoroAPI = &coroapi;
1177	sv_setiv (sv, (IV)&coroapi);	1688	sv_setiv (sv, (IV)&coroapi);
1178	SvREADONLY_on (sv);	1689	SvREADONLY_on (sv);
1179	}	1690	}
1180	}	1691	}
		1692
		1693	void
		1694	_set_current (SV *current)
		1695	PROTOTYPE: $
		1696	CODE:
		1697	SvREFCNT_dec (SvRV (coro_current));
		1698	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1181		1699
1182	int	1700	int
1183	prio (Coro::State coro, int newprio = 0)	1701	prio (Coro::State coro, int newprio = 0)
1184	ALIAS:	1702	ALIAS:
1185	nice = 1	1703	nice = 1
…		…
1188	RETVAL = coro->prio;	1706	RETVAL = coro->prio;
1189		1707
1190	if (items > 1)	1708	if (items > 1)
1191	{	1709	{
1192	if (ix)	1710	if (ix)
1193	newprio += coro->prio;	1711	newprio = coro->prio - newprio;
1194		1712
1195	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1713	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1196	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1714	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1197		1715
1198	coro->prio = newprio;	1716	coro->prio = newprio;
1199	}	1717	}
1200	}	1718	}
		1719	OUTPUT:
		1720	RETVAL
1201		1721
1202	SV *	1722	SV *
1203	ready (SV *self)	1723	ready (SV *self)
1204	PROTOTYPE: $	1724	PROTOTYPE: $
1205	CODE:	1725	CODE:
1206	RETVAL = boolSV (api_ready (self));	1726	RETVAL = boolSV (api_ready (self));
1207	OUTPUT:	1727	OUTPUT:
1208	RETVAL	1728	RETVAL
1209		1729
1210	SV *
1211	is_ready (SV *self)
1212	PROTOTYPE: $
1213	CODE:
1214	RETVAL = boolSV (api_is_ready (self));
1215	OUTPUT:
1216	RETVAL
1217
1218	int	1730	int
1219	nready (...)	1731	nready (...)
1220	PROTOTYPE:	1732	PROTOTYPE:
1221	CODE:	1733	CODE:
1222	RETVAL = coro_nready;	1734	RETVAL = coro_nready;
1223	OUTPUT:	1735	OUTPUT:
1224	RETVAL	1736	RETVAL
1225		1737
		1738	# for async_pool speedup
		1739	void
		1740	_pool_1 (SV *cb)
		1741	CODE:
		1742	{
		1743	int i, len;
		1744	HV *hv = (HV *)SvRV (coro_current);
		1745	AV *defav = GvAV (PL_defgv);
		1746	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1747	AV *invoke_av;
		1748
		1749	if (!invoke)
		1750	croak ("\3terminate\2\n");
		1751
		1752	hv_store (hv, "desc", sizeof ("desc") - 1,
		1753	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1754
		1755	invoke_av = (AV *)SvRV (invoke);
		1756	len = av_len (invoke_av);
		1757
		1758	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1759
		1760	if (len > 0)
		1761	{
		1762	av_fill (defav, len - 1);
		1763	for (i = 0; i < len; ++i)
		1764	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1765	}
		1766
		1767	SvREFCNT_dec (invoke);
		1768	}
		1769
		1770	void
		1771	_pool_2 (SV *cb)
		1772	CODE:
		1773	{
		1774	struct coro *coro = SvSTATE (coro_current);
		1775
		1776	sv_setsv (cb, &PL_sv_undef);
		1777
		1778	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1779	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1780	croak ("\3terminate\2\n");
		1781
		1782	av_clear (GvAV (PL_defgv));
		1783	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1784	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1785	coro->save = CORO_SAVE_DEF;
		1786	coro->prio = 0;
		1787
		1788	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1789	api_trace (coro, 0);
		1790
		1791	av_push (av_async_pool, newSVsv (coro_current));
		1792	}
		1793
		1794
1226	MODULE = Coro::State PACKAGE = Coro::AIO	1795	MODULE = Coro::State PACKAGE = Coro::AIO
1227		1796
1228	SV *	1797	SV *
1229	_get_state ()	1798	_get_state ()
1230	CODE:	1799	CODE:
1231	{	1800	{
1232	struct {	1801	struct io_state *data;
1233	int errorno;
1234	int laststype;
1235	int laststatval;
1236	Stat_t statcache;
1237	} data;
1238		1802
		1803	RETVAL = newSV (sizeof (struct io_state));
		1804	data = (struct io_state *)SvPVX (RETVAL);
		1805	SvCUR_set (RETVAL, sizeof (struct io_state));
		1806	SvPOK_only (RETVAL);
		1807
1239	data.errorno = errno;	1808	data->errorno = errno;
1240	data.laststype = PL_laststype;	1809	data->laststype = PL_laststype;
1241	data.laststatval = PL_laststatval;	1810	data->laststatval = PL_laststatval;
1242	data.statcache = PL_statcache;	1811	data->statcache = PL_statcache;
1243
1244	RETVAL = newSVpvn ((char *)&data, sizeof data);
1245	}	1812	}
1246	OUTPUT:	1813	OUTPUT:
1247	RETVAL	1814	RETVAL
1248		1815
1249	void	1816	void
1250	_set_state (char *data_)	1817	_set_state (char *data_)
1251	PROTOTYPE: $	1818	PROTOTYPE: $
1252	CODE:	1819	CODE:
1253	{	1820	{
1254	struct {	1821	struct io_state *data = (void *)data_;
1255	int errorno;
1256	int laststype;
1257	int laststatval;
1258	Stat_t statcache;
1259	} *data = (void *)data_;
1260		1822
1261	errno = data->errorno;	1823	errno = data->errorno;
1262	PL_laststype = data->laststype;	1824	PL_laststype = data->laststype;
1263	PL_laststatval = data->laststatval;	1825	PL_laststatval = data->laststatval;
1264	PL_statcache = data->statcache;	1826	PL_statcache = data->statcache;
1265	}	1827	}
		1828

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