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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.123 by root, Mon Dec 4 21:56:00 2006 UTC vs.
Revision 1.195 by root, Sat Oct 6 00:35:41 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	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
		87
		88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		89	# undef CORO_STACKGUARD
		90	#endif
		91
		92	#ifndef CORO_STACKGUARD
		93	# define CORO_STACKGUARD 0
		94	#endif
		95
		96	/* prefer perl internal functions over our own? */
		97	#ifndef CORO_PREFER_PERL_FUNCTIONS
		98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
80	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
82		105
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		107
85	#if __GNUC__ >= 3	108	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	# define expect(expr,value) __builtin_expect ((expr),(value))
87	#else	112	#else
88	# define attribute(x)	113	# define attribute(x)
		114	# define BARRIER
		115	# define expect(expr,value) (expr)
89	#endif	116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
90		120
91	#define NOINLINE attribute ((noinline))	121	#define NOINLINE attribute ((noinline))
92		122
93	#include "CoroAPI.h"	123	#include "CoroAPI.h"
94		124
…		…
99	#else	129	#else
100	# define LOCK (void)0	130	# define LOCK (void)0
101	# define UNLOCK (void)0	131	# define UNLOCK (void)0
102	#endif	132	#endif
103		133
		134	/* helper storage struct for Coro::AIO */
104	struct io_state	135	struct io_state
105	{	136	{
106	int errorno;	137	int errorno;
107	I32 laststype;	138	I32 laststype;
108	int laststatval;	139	int laststatval;
109	Stat_t statcache;	140	Stat_t statcache;
110	};	141	};
111		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
112	static struct CoroAPI coroapi;	144	static struct CoroAPI coroapi;
113	static AV *main_mainstack; /* used to differentiate between $main and others */	145	static AV *main_mainstack; /* used to differentiate between $main and others */
		146	static JMPENV *main_top_env;
114	static HV *coro_state_stash, *coro_stash;	147	static HV *coro_state_stash, *coro_stash;
115	static SV *coro_mortal; /* will be freed after next transfer */	148	static SV *coro_mortal; /* will be freed after next transfer */
116		149
		150	static GV *irsgv; /* $/ */
		151	static GV *stdoutgv; /* *STDOUT */
		152
		153	/* async_pool helper stuff */
		154	static SV *sv_pool_rss;
		155	static SV *sv_pool_size;
		156	static AV *av_async_pool;
		157
117	static struct coro_cctx *cctx_first;	158	static struct coro_cctx *cctx_first;
118	static int cctx_count, cctx_idle;	159	static int cctx_count, cctx_idle;
		160
		161	enum {
		162	CC_MAPPED = 0x01,
		163	CC_NOREUSE = 0x02, /* throw this away after tracing */
		164	CC_TRACE = 0x04,
		165	CC_TRACE_SUB = 0x08, /* trace sub calls */
		166	CC_TRACE_LINE = 0x10, /* trace each statement */
		167	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		168	};
119		169
120	/* this is a structure representing a c-level coroutine */	170	/* this is a structure representing a c-level coroutine */
121	typedef struct coro_cctx {	171	typedef struct coro_cctx {
122	struct coro_cctx *next;	172	struct coro_cctx *next;
123		173
124	/* the stack */	174	/* the stack */
125	void *sptr;	175	void *sptr;
126	long ssize; /* positive == mmap, otherwise malloc */	176	size_t ssize;
127		177
128	/* cpu state */	178	/* cpu state */
129	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	179	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		180	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
130	JMPENV *top_env;	181	JMPENV *top_env;
131	coro_context cctx;	182	coro_context cctx;
132		183
133	int inuse;
134
135	#if USE_VALGRIND	184	#if CORO_USE_VALGRIND
136	int valgrind_id;	185	int valgrind_id;
137	#endif	186	#endif
		187	unsigned char flags;
138	} coro_cctx;	188	} coro_cctx;
139		189
140	enum {	190	enum {
141	CF_RUNNING = 0x0001, /* coroutine is running */	191	CF_RUNNING = 0x0001, /* coroutine is running */
142	CF_READY = 0x0002, /* coroutine is ready */	192	CF_READY = 0x0002, /* coroutine is ready */
143	CF_NEW = 0x0004, /* ahs never been switched to */	193	CF_NEW = 0x0004, /* has never been switched to */
		194	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
144	};	195	};
145		196
146	/* this is a structure representing a perl-level coroutine */	197	/* this is a structure representing a perl-level coroutine */
147	struct coro {	198	struct coro {
148	/* the c coroutine allocated to this perl coroutine, if any */	199	/* the c coroutine allocated to this perl coroutine, if any */
149	coro_cctx *cctx;	200	coro_cctx *cctx;
150		201
151	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
152	AV *args;	203	AV *args;
153	int refcnt;	204	int refcnt;
154	int save; /* CORO_SAVE flags */
155	int flags; /* CF_ flags */	205	int flags; /* CF_ flags */
156		206
157	/* optionally saved, might be zero */	207	/* optionally saved, might be zero */
158	AV *defav; /* @_ */	208	AV *defav; /* @_ */
159	SV *defsv; /* $_ */	209	SV *defsv; /* $_ */
160	SV *errsv; /* $@ */	210	SV *errsv; /* $@ */
		211	SV *deffh; /* default filehandle */
161	SV *irssv; /* $/ */	212	SV *irssv; /* $/ */
162	SV *irssv_sv; /* real $/ cache */	213	SV *irssv_sv; /* real $/ cache */
163		214
164	#define VAR(name,type) type name;	215	#define VAR(name,type) type name;
165	# include "state.h"	216	# include "state.h"
166	#undef VAR	217	#undef VAR
167		218
		219	/* statistics */
		220	int usecount; /* number of transfers to this coro */
		221
168	/* coro process data */	222	/* coro process data */
169	int prio;	223	int prio;
		224	//SV *throw;
		225
		226	/* async_pool */
		227	SV *saved_deffh;
		228
		229	/* linked list */
		230	struct coro *next, *prev;
		231	HV *hv; /* the perl hash associated with this coro, if any */
170	};	232	};
171		233
172	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
173	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
174		236
		237	/** Coro ********************************************************************/
		238
		239	#define PRIO_MAX 3
		240	#define PRIO_HIGH 1
		241	#define PRIO_NORMAL 0
		242	#define PRIO_LOW -1
		243	#define PRIO_IDLE -3
		244	#define PRIO_MIN -4
		245
		246	/* for Coro.pm */
		247	static SV *coro_current;
		248	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		249	static int coro_nready;
		250	static struct coro *coro_first;
		251
		252	/** lowlevel stuff **********************************************************/
		253
175	static AV *	254	static AV *
176	coro_clone_padlist (CV *cv)	255	coro_clone_padlist (pTHX_ CV *cv)
177	{	256	{
178	AV *padlist = CvPADLIST (cv);	257	AV *padlist = CvPADLIST (cv);
179	AV *newpadlist, *newpad;	258	AV *newpadlist, *newpad;
180		259
181	newpadlist = newAV ();	260	newpadlist = newAV ();
…		…
193		272
194	return newpadlist;	273	return newpadlist;
195	}	274	}
196		275
197	static void	276	static void
198	free_padlist (AV *padlist)	277	free_padlist (pTHX_ AV *padlist)
199	{	278	{
200	/* may be during global destruction */	279	/* may be during global destruction */
201	if (SvREFCNT (padlist))	280	if (SvREFCNT (padlist))
202	{	281	{
203	I32 i = AvFILLp (padlist);	282	I32 i = AvFILLp (padlist);
…		…
224	AV *padlist;	303	AV *padlist;
225	AV *av = (AV *)mg->mg_obj;	304	AV *av = (AV *)mg->mg_obj;
226		305
227	/* casting is fun. */	306	/* casting is fun. */
228	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	307	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
229	free_padlist (padlist);	308	free_padlist (aTHX_ padlist);
230		309
231	SvREFCNT_dec (av);	310	SvREFCNT_dec (av);
232		311
233	return 0;	312	return 0;
234	}	313	}
…		…
242	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
243	? SvMAGIC (cv) \	322	? SvMAGIC (cv) \
244	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
245	: 0	324	: 0
246		325
		326	static struct coro *
		327	SvSTATE_ (pTHX_ SV *coro)
		328	{
		329	HV *stash;
		330	MAGIC *mg;
		331
		332	if (SvROK (coro))
		333	coro = SvRV (coro);
		334
		335	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		336	croak ("Coro::State object required");
		337
		338	stash = SvSTASH (coro);
		339	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		340	{
		341	/* very slow, but rare, check */
		342	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		343	croak ("Coro::State object required");
		344	}
		345
		346	mg = CORO_MAGIC (coro);
		347	return (struct coro *)mg->mg_ptr;
		348	}
		349
		350	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		351
247	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
248	static void	353	static void
249	get_padlist (CV *cv)	354	get_padlist (pTHX_ CV *cv)
250	{	355	{
251	MAGIC *mg = CORO_MAGIC (cv);	356	MAGIC *mg = CORO_MAGIC (cv);
252	AV *av;	357	AV *av;
253		358
254	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
255	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
256	else	361	else
257	{	362	{
258	#if 0	363	#if CORO_PREFER_PERL_FUNCTIONS
259	/* this is probably cleaner, but also slower? */	364	/* this is probably cleaner, but also slower? */
260	CV *cp = Perl_cv_clone (cv);	365	CV *cp = Perl_cv_clone (cv);
261	CvPADLIST (cv) = CvPADLIST (cp);	366	CvPADLIST (cv) = CvPADLIST (cp);
262	CvPADLIST (cp) = 0;	367	CvPADLIST (cp) = 0;
263	SvREFCNT_dec (cp);	368	SvREFCNT_dec (cp);
264	#else	369	#else
265	CvPADLIST (cv) = coro_clone_padlist (cv);	370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
266	#endif	371	#endif
267	}	372	}
268	}	373	}
269		374
270	static void	375	static void
271	put_padlist (CV *cv)	376	put_padlist (pTHX_ CV *cv)
272	{	377	{
273	MAGIC *mg = CORO_MAGIC (cv);	378	MAGIC *mg = CORO_MAGIC (cv);
274	AV *av;	379	AV *av;
275		380
276	if (!mg)	381	if (expect_false (!mg))
277	{	382	{
278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
280	mg->mg_virtual = &vtbl_coro;	385	mg->mg_virtual = &vtbl_coro;
281	mg->mg_obj = (SV *)newAV ();	386	mg->mg_obj = (SV *)newAV ();
282	}	387	}
283		388
284	av = (AV *)mg->mg_obj;	389	av = (AV *)mg->mg_obj;
285		390
286	if (AvFILLp (av) >= AvMAX (av))	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
287	av_extend (av, AvMAX (av) + 1);	392	av_extend (av, AvMAX (av) + 1);
288		393
289	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
290	}	395	}
291		396
292	#define SB do {	397	/** load & save, init *******************************************************/
293	#define SE } while (0)
294		398
295	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
296
297	static void	399	static void
298	load_perl (Coro__State c)	400	load_perl (pTHX_ Coro__State c)
299	{	401	{
300	#define VAR(name,type) PL_ ## name = c->name;	402	#define VAR(name,type) PL_ ## name = c->name;
301	# include "state.h"	403	# include "state.h"
302	#undef VAR	404	#undef VAR
303		405
304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	406	GvSV (PL_defgv) = c->defsv;
305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	407	GvAV (PL_defgv) = c->defav;
306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	408	GvSV (PL_errgv) = c->errsv;
307	if (c->irssv)	409	GvSV (irsgv) = c->irssv_sv;
308	{
309	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
310	SvREFCNT_dec (c->irssv);
311	else
312	{
313	REPLACE_SV (PL_rs, c->irssv);
314	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
315	sv_setsv (c->irssv_sv, PL_rs);
316	}
317	}
318		410
319	{	411	{
320	dSP;	412	dSP;
321	CV *cv;	413	CV *cv;
322		414
323	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
324	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
325	{	417	{
326	put_padlist (cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
327	CvDEPTH (cv) = PTR2IV (POPs);	419	CvDEPTH (cv) = PTR2IV (POPs);
328	CvPADLIST (cv) = (AV *)POPs;	420	CvPADLIST (cv) = (AV *)POPs;
329	}	421	}
330		422
331	PUTBACK;	423	PUTBACK;
332	}	424	}
333	}	425	}
334		426
335	static void	427	static void
336	save_perl (Coro__State c)	428	save_perl (pTHX_ Coro__State c)
337	{	429	{
338	{	430	{
339	dSP;	431	dSP;
340	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	436	/*
345	* the worst thing you can imagine happens first - we have to save	437	* the worst thing you can imagine happens first - we have to save
346	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
347	*/	439	*/
348		440
349	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
351	for (;;)	443	for (;;)
352	{	444	{
353	while (cxix >= 0)	445	while (expect_true (cxix >= 0))
354	{	446	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
356		448
357	if (CxTYPE (cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
358	{	450	{
359	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
360		452
361	if (CvDEPTH (cv))	453	if (expect_true (CvDEPTH (cv)))
362	{	454	{
363	EXTEND (SP, 3);	455	EXTEND (SP, 3);
364
365	PUSHs ((SV *)CvPADLIST (cv));	456	PUSHs ((SV *)CvPADLIST (cv));
366	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
368		459
369	CvDEPTH (cv) = 0;	460	CvDEPTH (cv) = 0;
370	get_padlist (cv);	461	get_padlist (aTHX_ cv);
371	}	462	}
372	}	463	}
373	#ifdef CXt_FORMAT
374	else if (CxTYPE (cx) == CXt_FORMAT)
375	{
376	/* I never used formats, so how should I know how these are implemented? */
377	/* my bold guess is as a simple, plain sub... */
378	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379	}
380	#endif
381	}	464	}
382		465
383	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
384	break;	467	break;
385		468
386	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
387	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
388	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
389	}	472	}
390		473
391	PUTBACK;	474	PUTBACK;
392	}	475	}
393		476
394	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
395	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
396	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
397	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	480	c->irssv_sv = GvSV (irsgv);
398		481
399	#define VAR(name,type)c->name = PL_ ## name;	482	#define VAR(name,type)c->name = PL_ ## name;
400	# include "state.h"	483	# include "state.h"
401	#undef VAR	484	#undef VAR
402	}	485	}
…		…
405	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
406	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
407	* on the (sometimes correct) assumption that coroutines do	490	* on the (sometimes correct) assumption that coroutines do
408	* not usually need a lot of stackspace.	491	* not usually need a lot of stackspace.
409	*/	492	*/
		493	#if CORO_PREFER_PERL_FUNCTIONS
		494	# define coro_init_stacks init_stacks
		495	#else
410	static void	496	static void
411	coro_init_stacks ()	497	coro_init_stacks (pTHX)
412	{	498	{
413	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	499	PL_curstackinfo = new_stackinfo(64, 6);
414	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
415	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
416	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
417		503
418	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
419	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
420	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
421		507
422	New(50,PL_tmps_stack,128,SV*);	508	New(50,PL_tmps_stack,64,SV*);
423	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
424	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
425	PL_tmps_max = 128;	511	PL_tmps_max = 64;
426		512
427	New(54,PL_markstack,32,I32);	513	New(54,PL_markstack,16,I32);
428	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
429	PL_markstack_max = PL_markstack + 32;	515	PL_markstack_max = PL_markstack + 16;
430		516
431	#ifdef SET_MARK_OFFSET	517	#ifdef SET_MARK_OFFSET
432	SET_MARK_OFFSET;	518	SET_MARK_OFFSET;
433	#endif	519	#endif
434		520
435	New(54,PL_scopestack,32,I32);	521	New(54,PL_scopestack,16,I32);
436	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
437	PL_scopestack_max = 32;	523	PL_scopestack_max = 16;
438		524
439	New(54,PL_savestack,64,ANY);	525	New(54,PL_savestack,64,ANY);
440	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
441	PL_savestack_max = 64;	527	PL_savestack_max = 64;
442		528
443	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
444	New(54,PL_retstack,16,OP*);	530	New(54,PL_retstack,4,OP*);
445	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
446	PL_retstack_max = 16;	532	PL_retstack_max = 4;
447	#endif	533	#endif
448	}	534	}
		535	#endif
449		536
450	/*	537	/*
451	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
452	*/	539	*/
453	static void	540	static void
454	coro_destroy_stacks ()	541	coro_destroy_stacks (pTHX)
455	{	542	{
456	if (!IN_DESTRUCT)
457	{
458	/* is this ugly, I ask? */
459	LEAVE_SCOPE (0);
460
461	/* sure it is, but more important: is it correct?? :/ */
462	FREETMPS;
463
464	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
465	}
466
467	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
468	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
469		545
470	while (PL_curstackinfo)	546	while (PL_curstackinfo)
471	{	547	{
472	PERL_SI *p = PL_curstackinfo->si_prev;	548	PERL_SI *p = PL_curstackinfo->si_prev;
473		549
474	{ /*D*//*remove*/
475	dSP;
476	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
477	PUTBACK; /* possibly superfluous */
478	}
479
480	if (!IN_DESTRUCT)	550	if (!IN_DESTRUCT)
481	{
482	dounwind (-1);/*D*//*remove*/
483	SvREFCNT_dec (PL_curstackinfo->si_stack);	551	SvREFCNT_dec (PL_curstackinfo->si_stack);
484	}
485		552
486	Safefree (PL_curstackinfo->si_cxstack);	553	Safefree (PL_curstackinfo->si_cxstack);
487	Safefree (PL_curstackinfo);	554	Safefree (PL_curstackinfo);
488	PL_curstackinfo = p;	555	PL_curstackinfo = p;
489	}	556	}
…		…
495	#if !PERL_VERSION_ATLEAST (5,9,0)	562	#if !PERL_VERSION_ATLEAST (5,9,0)
496	Safefree (PL_retstack);	563	Safefree (PL_retstack);
497	#endif	564	#endif
498	}	565	}
499		566
500	static void	567	static size_t
501	setup_coro (struct coro *coro)	568	coro_rss (pTHX_ struct coro *coro)
		569	{
		570	size_t rss = sizeof (*coro);
		571
		572	if (coro->mainstack)
		573	{
		574	if (coro->flags & CF_RUNNING)
		575	{
		576	#define VAR(name,type)coro->name = PL_ ## name;
		577	# include "state.h"
		578	#undef VAR
		579	}
		580
		581	rss += sizeof (coro->curstackinfo);
		582	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		583	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		584	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		585	rss += coro->tmps_max * sizeof (SV *);
		586	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		587	rss += coro->scopestack_max * sizeof (I32);
		588	rss += coro->savestack_max * sizeof (ANY);
		589
		590	#if !PERL_VERSION_ATLEAST (5,9,0)
		591	rss += coro->retstack_max * sizeof (OP *);
		592	#endif
		593	}
		594
		595	return rss;
		596	}
		597
		598	/** coroutine stack handling ************************************************/
		599
		600	static void
		601	coro_setup (pTHX_ struct coro *coro)
502	{	602	{
503	/*	603	/*
504	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
505	*/	605	*/
506
507	coro_init_stacks ();	606	coro_init_stacks (aTHX);
508		607
		608	PL_runops = RUNOPS_DEFAULT;
509	PL_curcop = &PL_compiling;	609	PL_curcop = &PL_compiling;
510	PL_in_eval = EVAL_NULL;	610	PL_in_eval = EVAL_NULL;
		611	PL_comppad = 0;
511	PL_curpm = 0;	612	PL_curpm = 0;
		613	PL_curpad = 1;
512	PL_localizing = 0;	614	PL_localizing = 0;
513	PL_dirty = 0;	615	PL_dirty = 0;
514	PL_restartop = 0;	616	PL_restartop = 0;
		617
		618	GvSV (PL_defgv) = newSV (0);
		619	GvAV (PL_defgv) = coro->args; coro->args = 0;
		620	GvSV (PL_errgv) = newSV (0);
		621	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		622	PL_rs = newSVsv (GvSV (irsgv));
		623	PL_defoutgv = SvREFCNT_inc (stdoutgv);
515		624
516	{	625	{
517	dSP;	626	dSP;
518	LOGOP myop;	627	LOGOP myop;
519		628
520	SvREFCNT_dec (GvAV (PL_defgv));
521	GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523	Zero (&myop, 1, LOGOP);	629	Zero (&myop, 1, LOGOP);
524	myop.op_next = Nullop;	630	myop.op_next = Nullop;
525	myop.op_flags = OPf_WANT_VOID;	631	myop.op_flags = OPf_WANT_VOID;
526		632
527	PUSHMARK (SP);	633	PUSHMARK (SP);
528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	634	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
529	PUTBACK;	635	PUTBACK;
530	PL_op = (OP *)&myop;	636	PL_op = (OP *)&myop;
531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	637	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532	SPAGAIN;	638	SPAGAIN;
533	}	639	}
534		640
535	ENTER; /* necessary e.g. for dounwind */	641	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
536	}	642	}
537		643
538	static void	644	static void
		645	coro_destroy (pTHX_ struct coro *coro)
		646	{
		647	if (!IN_DESTRUCT)
		648	{
		649	/* restore all saved variables and stuff */
		650	LEAVE_SCOPE (0);
		651	assert (PL_tmps_floor == -1);
		652
		653	/* free all temporaries */
		654	FREETMPS;
		655	assert (PL_tmps_ix == -1);
		656
		657	/* unwind all extra stacks */
		658	POPSTACK_TO (PL_mainstack);
		659
		660	/* unwind main stack */
		661	dounwind (-1);
		662	}
		663
		664	SvREFCNT_dec (GvSV (PL_defgv));
		665	SvREFCNT_dec (GvAV (PL_defgv));
		666	SvREFCNT_dec (GvSV (PL_errgv));
		667	SvREFCNT_dec (PL_defoutgv);
		668	SvREFCNT_dec (PL_rs);
		669	SvREFCNT_dec (GvSV (irsgv));
		670
		671	SvREFCNT_dec (coro->saved_deffh);
		672	//SvREFCNT_dec (coro->throw);
		673
		674	coro_destroy_stacks (aTHX);
		675	}
		676
		677	static void
539	free_coro_mortal ()	678	free_coro_mortal (pTHX)
540	{	679	{
541	if (coro_mortal)	680	if (expect_true (coro_mortal))
542	{	681	{
543	SvREFCNT_dec (coro_mortal);	682	SvREFCNT_dec (coro_mortal);
544	coro_mortal = 0;	683	coro_mortal = 0;
545	}	684	}
546	}	685	}
547		686
		687	static int
		688	runops_trace (pTHX)
		689	{
		690	COP *oldcop = 0;
		691	int oldcxix = -2;
		692	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		693	coro_cctx *cctx = coro->cctx;
		694
		695	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		696	{
		697	PERL_ASYNC_CHECK ();
		698
		699	if (cctx->flags & CC_TRACE_ALL)
		700	{
		701	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		702	{
		703	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		704	SV **bot, **top;
		705	AV *av = newAV (); /* return values */
		706	SV **cb;
		707	dSP;
		708
		709	GV *gv = CvGV (cx->blk_sub.cv);
		710	SV *fullname = sv_2mortal (newSV (0));
		711	if (isGV (gv))
		712	gv_efullname3 (fullname, gv, 0);
		713
		714	bot = PL_stack_base + cx->blk_oldsp + 1;
		715	top = cx->blk_gimme == G_ARRAY ? SP + 1
		716	: cx->blk_gimme == G_SCALAR ? bot + 1
		717	: bot;
		718
		719	av_extend (av, top - bot);
		720	while (bot < top)
		721	av_push (av, SvREFCNT_inc (*bot++));
		722
		723	PL_runops = RUNOPS_DEFAULT;
		724	ENTER;
		725	SAVETMPS;
		726	EXTEND (SP, 3);
		727	PUSHMARK (SP);
		728	PUSHs (&PL_sv_no);
		729	PUSHs (fullname);
		730	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		731	PUTBACK;
		732	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		733	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		734	SPAGAIN;
		735	FREETMPS;
		736	LEAVE;
		737	PL_runops = runops_trace;
		738	}
		739
		740	if (oldcop != PL_curcop)
		741	{
		742	oldcop = PL_curcop;
		743
		744	if (PL_curcop != &PL_compiling)
		745	{
		746	SV **cb;
		747
		748	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		749	{
		750	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		751
		752	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		753	{
		754	runops_proc_t old_runops = PL_runops;
		755	dSP;
		756	GV *gv = CvGV (cx->blk_sub.cv);
		757	SV *fullname = sv_2mortal (newSV (0));
		758
		759	if (isGV (gv))
		760	gv_efullname3 (fullname, gv, 0);
		761
		762	PL_runops = RUNOPS_DEFAULT;
		763	ENTER;
		764	SAVETMPS;
		765	EXTEND (SP, 3);
		766	PUSHMARK (SP);
		767	PUSHs (&PL_sv_yes);
		768	PUSHs (fullname);
		769	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		770	PUTBACK;
		771	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		772	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		773	SPAGAIN;
		774	FREETMPS;
		775	LEAVE;
		776	PL_runops = runops_trace;
		777	}
		778
		779	oldcxix = cxstack_ix;
		780	}
		781
		782	if (cctx->flags & CC_TRACE_LINE)
		783	{
		784	dSP;
		785
		786	PL_runops = RUNOPS_DEFAULT;
		787	ENTER;
		788	SAVETMPS;
		789	EXTEND (SP, 3);
		790	PL_runops = RUNOPS_DEFAULT;
		791	PUSHMARK (SP);
		792	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		793	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		794	PUTBACK;
		795	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		796	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		797	SPAGAIN;
		798	FREETMPS;
		799	LEAVE;
		800	PL_runops = runops_trace;
		801	}
		802	}
		803	}
		804	}
		805	}
		806
		807	TAINT_NOT;
		808	return 0;
		809	}
		810
548	/* inject a fake call to Coro::State::_cctx_init into the execution */	811	/* inject a fake call to Coro::State::_cctx_init into the execution */
		812	/* _cctx_init should be careful, as it could be called at almost any time */
		813	/* during execution of a perl program */
549	static void NOINLINE	814	static void NOINLINE
550	prepare_cctx (coro_cctx *cctx)	815	prepare_cctx (pTHX_ coro_cctx *cctx)
551	{	816	{
552	dSP;	817	dSP;
553	LOGOP myop;	818	LOGOP myop;
		819
		820	PL_top_env = &PL_start_env;
		821
		822	if (cctx->flags & CC_TRACE)
		823	PL_runops = runops_trace;
554		824
555	Zero (&myop, 1, LOGOP);	825	Zero (&myop, 1, LOGOP);
556	myop.op_next = PL_op;	826	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	827	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		828
…		…
564	PL_op = (OP *)&myop;	834	PL_op = (OP *)&myop;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	835	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	836	SPAGAIN;
567	}	837	}
568		838
		839	/*
		840	* this is a _very_ stripped down perl interpreter ;)
		841	*/
569	static void	842	static void
570	coro_run (void *arg)	843	coro_run (void *arg)
571	{	844	{
		845	dTHX;
		846
572	/* coro_run is the alternative tail of transfer(), so unlock here. */	847	/* coro_run is the alternative tail of transfer(), so unlock here. */
573	UNLOCK;	848	UNLOCK;
574		849
575	/*	850	/* we now skip the entersub that lead to transfer() */
576	* this is a _very_ stripped down perl interpreter ;)	851	PL_op = PL_op->op_next;
577	*/
578	PL_top_env = &PL_start_env;
579		852
580	/* inject call to cctx_init */	853	/* inject a fake subroutine call to cctx_init */
581	prepare_cctx ((coro_cctx *)arg);	854	prepare_cctx (aTHX_ (coro_cctx *)arg);
582		855
583	/* somebody will hit me for both perl_run and PL_restartop */	856	/* somebody or something will hit me for both perl_run and PL_restartop */
584	PL_restartop = PL_op;	857	PL_restartop = PL_op;
585	perl_run (PL_curinterp);	858	perl_run (PL_curinterp);
586		859
587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	860	/*
588	abort ();	861	* If perl-run returns we assume exit() was being called or the coro
		862	* fell off the end, which seems to be the only valid (non-bug)
		863	* reason for perl_run to return. We try to exit by jumping to the
		864	* bootstrap-time "top" top_env, as we cannot restore the "main"
		865	* coroutine as Coro has no such concept
		866	*/
		867	PL_top_env = main_top_env;
		868	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
589	}	869	}
590		870
591	static coro_cctx *	871	static coro_cctx *
592	cctx_new ()	872	cctx_new ()
593	{	873	{
594	coro_cctx *cctx;	874	coro_cctx *cctx;
		875	void *stack_start;
		876	size_t stack_size;
595		877
596	++cctx_count;	878	++cctx_count;
597		879
598	New (0, cctx, 1, coro_cctx);	880	Newz (0, cctx, 1, coro_cctx);
599		881
600	#if HAVE_MMAP	882	#if HAVE_MMAP
601		883
602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	884	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
603	/* mmap supposedly does allocate-on-write for us */	885	/* mmap supposedly does allocate-on-write for us */
604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	886	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605		887
606	if (cctx->sptr == (void *)-1)	888	if (cctx->sptr != (void *)-1)
607	{
608	perror ("FATAL: unable to mmap stack for coroutine");
609	_exit (EXIT_FAILURE);
610	}	889	{
611
612	# if STACKGUARD	890	# if CORO_STACKGUARD
613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	891	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
614	# endif	892	# endif
		893	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		894	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		895	cctx->flags |= CC_MAPPED;
		896	}
		897	else
		898	#endif
		899	{
		900	cctx->ssize = coro_stacksize * (long)sizeof (long);
		901	New (0, cctx->sptr, coro_stacksize, long);
615		902
616	#else
617
618	cctx->ssize = STACKSIZE * (long)sizeof (long);
619	New (0, cctx->sptr, STACKSIZE, long);
620
621	if (!cctx->sptr)	903	if (!cctx->sptr)
622	{	904	{
623	perror ("FATAL: unable to malloc stack for coroutine");	905	perror ("FATAL: unable to allocate stack for coroutine");
624	_exit (EXIT_FAILURE);	906	_exit (EXIT_FAILURE);
625	}	907	}
626		908
627	#endif	909	stack_start = cctx->sptr;
		910	stack_size = cctx->ssize;
		911	}
628		912
629	#if USE_VALGRIND	913	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632	cctx->ssize + (char *)cctx->sptr
633	);
634	#endif
635
636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	914	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
637		915
638	return cctx;	916	return cctx;
639	}	917	}
640		918
641	static void	919	static void
…		…
644	if (!cctx)	922	if (!cctx)
645	return;	923	return;
646		924
647	--cctx_count;	925	--cctx_count;
648		926
649	#if USE_VALGRIND	927	#if CORO_USE_VALGRIND
650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	928	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651	#endif	929	#endif
652		930
653	#if HAVE_MMAP	931	#if HAVE_MMAP
		932	if (cctx->flags & CC_MAPPED)
654	munmap (cctx->sptr, cctx->ssize);	933	munmap (cctx->sptr, cctx->ssize);
655	#else	934	else
		935	#endif
656	Safefree (cctx->sptr);	936	Safefree (cctx->sptr);
657	#endif
658		937
659	Safefree (cctx);	938	Safefree (cctx);
660	}	939	}
661		940
		941	/* wether this cctx should be destructed */
		942	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		943
662	static coro_cctx *	944	static coro_cctx *
663	cctx_get ()	945	cctx_get (pTHX)
664	{	946	{
665	coro_cctx *cctx;	947	while (expect_true (cctx_first))
666
667	if (cctx_first)
668	{	948	{
669	cctx = cctx_first;	949	coro_cctx *cctx = cctx_first;
670	cctx_first = cctx->next;	950	cctx_first = cctx->next;
671	--cctx_idle;	951	--cctx_idle;
672	}	952
673	else	953	if (expect_true (!CCTX_EXPIRED (cctx)))
674	{	954	return cctx;
675	cctx = cctx_new ();	955
676	PL_op = PL_op->op_next;	956	cctx_destroy (cctx);
677	}	957	}
678		958
679	return cctx;	959	return cctx_new ();
680	}	960	}
681		961
682	static void	962	static void
683	cctx_put (coro_cctx *cctx)	963	cctx_put (coro_cctx *cctx)
684	{	964	{
685	/* free another cctx if overlimit */	965	/* free another cctx if overlimit */
686	if (cctx_idle >= MAX_IDLE_CCTX)	966	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
687	{	967	{
688	coro_cctx *first = cctx_first;	968	coro_cctx *first = cctx_first;
689	cctx_first = first->next;	969	cctx_first = first->next;
690	--cctx_idle;	970	--cctx_idle;
691		971
692	assert (!first->inuse);
693	cctx_destroy (first);	972	cctx_destroy (first);
694	}	973	}
695		974
696	++cctx_idle;	975	++cctx_idle;
697	cctx->next = cctx_first;	976	cctx->next = cctx_first;
698	cctx_first = cctx;	977	cctx_first = cctx;
699	}	978	}
700		979
701	/* never call directly, always through the coro_state_transfer global variable */	980	/** coroutine switching *****************************************************/
		981
		982	static void
		983	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		984	{
		985	if (expect_true (prev != next))
		986	{
		987	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		988	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		989
		990	if (expect_false (next->flags & CF_RUNNING))
		991	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		992
		993	if (expect_false (next->flags & CF_DESTROYED))
		994	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		995
		996	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		997	croak ("Coro::State::transfer called while parsing, but this is not supported");
		998	}
		999	}
		1000
		1001	/* always use the TRANSFER macro */
702	static void NOINLINE	1002	static void NOINLINE
703	transfer (struct coro *prev, struct coro *next)	1003	transfer (pTHX_ struct coro *prev, struct coro *next)
704	{	1004	{
705	dSTACKLEVEL;	1005	dSTACKLEVEL;
706		1006
707	/* sometimes transfer is only called to set idle_sp */	1007	/* sometimes transfer is only called to set idle_sp */
708	if (!next)	1008	if (expect_false (!next))
		1009	{
709	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1010	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1011	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1012	}
710	else if (prev != next)	1013	else if (expect_true (prev != next))
711	{	1014	{
712	coro_cctx *prev__cctx;	1015	coro_cctx *prev__cctx;
713		1016
714	if (prev->flags & CF_NEW)	1017	if (expect_false (prev->flags & CF_NEW))
715	{	1018	{
716	/* create a new empty context */	1019	/* create a new empty context */
717	Newz (0, prev->cctx, 1, coro_cctx);	1020	Newz (0, prev->cctx, 1, coro_cctx);
718	prev->cctx->inuse = 1;
719	prev->flags &= ~CF_NEW;	1021	prev->flags &= ~CF_NEW;
720	prev->flags |= CF_RUNNING;	1022	prev->flags |= CF_RUNNING;
721	}	1023	}
722		1024
723	/*TODO: must not croak here */
724	if (!prev->flags & CF_RUNNING)
725	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
726
727	if (next->flags & CF_RUNNING)
728	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
729
730	prev->flags &= ~CF_RUNNING;	1025	prev->flags &= ~CF_RUNNING;
731	next->flags |= CF_RUNNING;	1026	next->flags |= CF_RUNNING;
732		1027
733	LOCK;	1028	LOCK;
734		1029
735	if (next->flags & CF_NEW)	1030	if (expect_false (next->flags & CF_NEW))
736	{	1031	{
737	/* need to start coroutine */	1032	/* need to start coroutine */
738	next->flags &= ~CF_NEW;	1033	next->flags &= ~CF_NEW;
739	/* first get rid of the old state */	1034	/* first get rid of the old state */
740	save_perl (prev);	1035	save_perl (aTHX_ prev);
741	/* setup coroutine call */	1036	/* setup coroutine call */
742	setup_coro (next);	1037	coro_setup (aTHX_ next);
743	/* need a new stack */
744	assert (!next->stack);
745	}	1038	}
746	else	1039	else
747	{	1040	{
748	/* coroutine already started */	1041	/* coroutine already started */
749	save_perl (prev);	1042	save_perl (aTHX_ prev);
750	load_perl (next);	1043	load_perl (aTHX_ next);
751	}	1044	}
752		1045
753	prev__cctx = prev->cctx;	1046	prev__cctx = prev->cctx;
754		1047
755	/* possibly "free" the cctx */	1048	/* possibly "free" the cctx */
756	if (prev__cctx->idle_sp == STACKLEVEL)	1049	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
757	{	1050	{
758	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1051	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
759	assert (PL_top_env == prev__cctx->top_env);	1052	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
760		1053
761	prev->cctx = 0;	1054	prev->cctx = 0;
762		1055
		1056	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1057	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1058	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1059	next->cctx = cctx_get (aTHX);
		1060
763	cctx_put (prev__cctx);	1061	cctx_put (prev__cctx);
764	prev__cctx->inuse = 0;
765	}	1062	}
766		1063
		1064	++next->usecount;
		1065
767	if (!next->cctx)	1066	if (expect_true (!next->cctx))
768	{
769	next->cctx = cctx_get ();	1067	next->cctx = cctx_get (aTHX);
770	assert (!next->cctx->inuse);
771	next->cctx->inuse = 1;
772	}
773		1068
774	if (prev__cctx != next->cctx)	1069	if (expect_false (prev__cctx != next->cctx))
775	{	1070	{
776	prev__cctx->top_env = PL_top_env;	1071	prev__cctx->top_env = PL_top_env;
777	PL_top_env = next->cctx->top_env;	1072	PL_top_env = next->cctx->top_env;
778	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1073	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
779	}	1074	}
780		1075
781	free_coro_mortal ();	1076	free_coro_mortal (aTHX);
782
783	UNLOCK;	1077	UNLOCK;
784	}	1078	}
785	}	1079	}
786		1080
787	struct transfer_args	1081	struct transfer_args
788	{	1082	{
789	struct coro *prev, *next;	1083	struct coro *prev, *next;
790	};	1084	};
791		1085
792	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1086	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1087	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
793		1088
		1089	/** high level stuff ********************************************************/
		1090
794	static void	1091	static int
795	coro_state_destroy (struct coro *coro)	1092	coro_state_destroy (pTHX_ struct coro *coro)
796	{	1093	{
797	if (coro->refcnt--)	1094	if (coro->flags & CF_DESTROYED)
798	return;	1095	return 0;
		1096
		1097	coro->flags |= CF_DESTROYED;
		1098
		1099	if (coro->flags & CF_READY)
		1100	{
		1101	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1102	/* alternative: look through all ready queues and remove the coro */
		1103	LOCK;
		1104	--coro_nready;
		1105	UNLOCK;
		1106	}
		1107	else
		1108	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
799		1109
800	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	if (coro->mainstack && coro->mainstack != main_mainstack)
801	{	1111	{
802	struct coro temp;	1112	struct coro temp;
803	Zero (&temp, 1, struct coro);
804	temp.save = CORO_SAVE_ALL;
805		1113
806	if (coro->flags & CF_RUNNING)	1114	if (coro->flags & CF_RUNNING)
807	croak ("FATAL: tried to destroy currently running coroutine");	1115	croak ("FATAL: tried to destroy currently running coroutine");
808		1116
809	save_perl (&temp);	1117	save_perl (aTHX_ &temp);
810	load_perl (coro);	1118	load_perl (aTHX_ coro);
811		1119
812	coro_destroy_stacks ();	1120	coro_destroy (aTHX_ coro);
813		1121
814	load_perl (&temp); /* this will get rid of defsv etc.. */	1122	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
815		1123
816	coro->mainstack = 0;	1124	coro->mainstack = 0;
817	}	1125	}
818		1126
819	cctx_destroy (coro->cctx);	1127	cctx_destroy (coro->cctx);
820	SvREFCNT_dec (coro->args);	1128	SvREFCNT_dec (coro->args);
821	Safefree (coro);	1129
		1130	if (coro->next) coro->next->prev = coro->prev;
		1131	if (coro->prev) coro->prev->next = coro->next;
		1132	if (coro == coro_first) coro_first = coro->next;
		1133
		1134	return 1;
822	}	1135	}
823		1136
824	static int	1137	static int
825	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1138	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
826	{	1139	{
827	struct coro *coro = (struct coro *)mg->mg_ptr;	1140	struct coro *coro = (struct coro *)mg->mg_ptr;
828	mg->mg_ptr = 0;	1141	mg->mg_ptr = 0;
829		1142
		1143	coro->hv = 0;
		1144
		1145	if (--coro->refcnt < 0)
		1146	{
830	coro_state_destroy (coro);	1147	coro_state_destroy (aTHX_ coro);
		1148	Safefree (coro);
		1149	}
831		1150
832	return 0;	1151	return 0;
833	}	1152	}
834		1153
835	static int	1154	static int
…		…
842	return 0;	1161	return 0;
843	}	1162	}
844		1163
845	static MGVTBL coro_state_vtbl = {	1164	static MGVTBL coro_state_vtbl = {
846	0, 0, 0, 0,	1165	0, 0, 0, 0,
847	coro_state_clear,	1166	coro_state_free,
848	0,	1167	0,
849	#ifdef MGf_DUP	1168	#ifdef MGf_DUP
850	coro_state_dup,	1169	coro_state_dup,
851	#else	1170	#else
852	# define MGf_DUP 0	1171	# define MGf_DUP 0
853	#endif	1172	#endif
854	};	1173	};
855		1174
856	static struct coro *
857	SvSTATE (SV *coro)
858	{
859	HV *stash;
860	MAGIC *mg;
861
862	if (SvROK (coro))
863	coro = SvRV (coro);
864
865	stash = SvSTASH (coro);
866	if (stash != coro_stash && stash != coro_state_stash)
867	{
868	/* very slow, but rare, check */
869	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
870	croak ("Coro::State object required");
871	}
872
873	mg = SvMAGIC (coro);
874	assert (mg->mg_type == PERL_MAGIC_ext);
875	return (struct coro *)mg->mg_ptr;
876	}
877
878	static void	1175	static void
879	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1176	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
880	{	1177	{
881	ta->prev = SvSTATE (prev_sv);	1178	ta->prev = SvSTATE (prev_sv);
882	ta->next = SvSTATE (next_sv);	1179	ta->next = SvSTATE (next_sv);
		1180	TRANSFER_CHECK (*ta);
883	}	1181	}
884		1182
885	static void	1183	static void
886	api_transfer (SV *prev_sv, SV *next_sv)	1184	api_transfer (SV *prev_sv, SV *next_sv)
887	{	1185	{
		1186	dTHX;
888	struct transfer_args ta;	1187	struct transfer_args ta;
889		1188
890	prepare_transfer (&ta, prev_sv, next_sv);	1189	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
891	TRANSFER (ta);	1190	TRANSFER (ta);
892	}	1191	}
893		1192
894	static int
895	api_save (SV *coro_sv, int new_save)
896	{
897	struct coro *coro = SvSTATE (coro_sv);
898	int old_save = coro->save;
899
900	if (new_save >= 0)
901	coro->save = new_save;
902
903	return old_save;
904	}
905
906	/** Coro ********************************************************************/	1193	/** Coro ********************************************************************/
907		1194
908	#define PRIO_MAX 3
909	#define PRIO_HIGH 1
910	#define PRIO_NORMAL 0
911	#define PRIO_LOW -1
912	#define PRIO_IDLE -3
913	#define PRIO_MIN -4
914
915	/* for Coro.pm */
916	static SV *coro_current;
917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
918	static int coro_nready;
919
920	static void	1195	static void
921	coro_enq (SV *coro_sv)	1196	coro_enq (pTHX_ SV *coro_sv)
922	{	1197	{
923	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1198	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
924	coro_nready++;
925	}	1199	}
926		1200
927	static SV *	1201	static SV *
928	coro_deq (int min_prio)	1202	coro_deq (pTHX_ int min_prio)
929	{	1203	{
930	int prio = PRIO_MAX - PRIO_MIN;	1204	int prio = PRIO_MAX - PRIO_MIN;
931		1205
932	min_prio -= PRIO_MIN;	1206	min_prio -= PRIO_MIN;
933	if (min_prio < 0)	1207	if (min_prio < 0)
934	min_prio = 0;	1208	min_prio = 0;
935		1209
936	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1210	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
937	if (AvFILLp (coro_ready [prio]) >= 0)	1211	if (AvFILLp (coro_ready [prio]) >= 0)
938	{
939	coro_nready--;
940	return av_shift (coro_ready [prio]);	1212	return av_shift (coro_ready [prio]);
941	}
942		1213
943	return 0;	1214	return 0;
944	}	1215	}
945		1216
946	static int	1217	static int
947	api_ready (SV *coro_sv)	1218	api_ready (SV *coro_sv)
948	{	1219	{
		1220	dTHX;
949	struct coro *coro;	1221	struct coro *coro;
950		1222
951	if (SvROK (coro_sv))	1223	if (SvROK (coro_sv))
952	coro_sv = SvRV (coro_sv);	1224	coro_sv = SvRV (coro_sv);
953		1225
954	coro = SvSTATE (coro_sv);	1226	coro = SvSTATE (coro_sv);
955		1227
956	if (coro->flags & CF_READY)	1228	if (coro->flags & CF_READY)
957	return 0;	1229	return 0;
958		1230
959	#if 0 /* this is actually harmless */
960	if (coro->flags & CF_RUNNING)
961	croak ("Coro::ready called on currently running coroutine");
962	#endif
963
964	coro->flags |= CF_READY;	1231	coro->flags |= CF_READY;
965		1232
966	LOCK;	1233	LOCK;
967	coro_enq (SvREFCNT_inc (coro_sv));	1234	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1235	++coro_nready;
968	UNLOCK;	1236	UNLOCK;
969		1237
970	return 1;	1238	return 1;
971	}	1239	}
972		1240
973	static int	1241	static int
974	api_is_ready (SV *coro_sv)	1242	api_is_ready (SV *coro_sv)
975	{	1243	{
		1244	dTHX;
976	return !!SvSTATE (coro_sv)->flags & CF_READY;	1245	return !!(SvSTATE (coro_sv)->flags & CF_READY);
977	}	1246	}
978		1247
979	static void	1248	static void
980	prepare_schedule (struct transfer_args *ta)	1249	prepare_schedule (pTHX_ struct transfer_args *ta)
981	{	1250	{
982	SV *prev, *next;	1251	SV *prev_sv, *next_sv;
983		1252
984	for (;;)	1253	for (;;)
985	{	1254	{
986	LOCK;	1255	LOCK;
987	next = coro_deq (PRIO_MIN);	1256	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1257
		1258	/* nothing to schedule: call the idle handler */
		1259	if (expect_false (!next_sv))
		1260	{
		1261	dSP;
		1262	UNLOCK;
		1263
		1264	ENTER;
		1265	SAVETMPS;
		1266
		1267	PUSHMARK (SP);
		1268	PUTBACK;
		1269	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1270
		1271	FREETMPS;
		1272	LEAVE;
		1273	continue;
		1274	}
		1275
		1276	ta->next = SvSTATE (next_sv);
		1277
		1278	/* cannot transfer to destroyed coros, skip and look for next */
		1279	if (expect_false (ta->next->flags & CF_DESTROYED))
		1280	{
		1281	UNLOCK;
		1282	SvREFCNT_dec (next_sv);
		1283	/* coro_nready is already taken care of by destroy */
		1284	continue;
		1285	}
		1286
		1287	--coro_nready;
988	UNLOCK;	1288	UNLOCK;
989
990	if (next)
991	break;	1289	break;
992
993	{
994	dSP;
995
996	ENTER;
997	SAVETMPS;
998
999	PUSHMARK (SP);
1000	PUTBACK;
1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1002
1003	FREETMPS;
1004	LEAVE;
1005	}	1290	}
1006	}
1007
1008	prev = SvRV (coro_current);
1009	SvRV_set (coro_current, next);
1010		1291
1011	/* free this only after the transfer */	1292	/* free this only after the transfer */
1012	LOCK;	1293	prev_sv = SvRV (coro_current);
1013	free_coro_mortal ();
1014	UNLOCK;
1015	coro_mortal = prev;
1016
1017	assert (!SvROK(prev));//D
1018	assert (!SvROK(next));//D
1019
1020	ta->prev = SvSTATE (prev);	1294	ta->prev = SvSTATE (prev_sv);
1021	ta->next = SvSTATE (next);	1295	TRANSFER_CHECK (*ta);
1022
1023	assert (ta->next->flags & CF_READY);	1296	assert (ta->next->flags & CF_READY);
1024	ta->next->flags &= ~CF_READY;	1297	ta->next->flags &= ~CF_READY;
1025	}	1298	SvRV_set (coro_current, next_sv);
1026		1299
		1300	LOCK;
		1301	free_coro_mortal (aTHX);
		1302	coro_mortal = prev_sv;
		1303	UNLOCK;
		1304	}
		1305
1027	static void	1306	static void
1028	prepare_cede (struct transfer_args *ta)	1307	prepare_cede (pTHX_ struct transfer_args *ta)
1029	{	1308	{
1030	api_ready (coro_current);	1309	api_ready (coro_current);
1031
1032	prepare_schedule (ta);	1310	prepare_schedule (aTHX_ ta);
		1311	}
		1312
		1313	static int
		1314	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1315	{
		1316	if (coro_nready)
		1317	{
		1318	SV *prev = SvRV (coro_current);
		1319	prepare_schedule (aTHX_ ta);
		1320	api_ready (prev);
		1321	return 1;
		1322	}
		1323	else
		1324	return 0;
1033	}	1325	}
1034		1326
1035	static void	1327	static void
1036	api_schedule (void)	1328	api_schedule (void)
1037	{	1329	{
		1330	dTHX;
1038	struct transfer_args ta;	1331	struct transfer_args ta;
1039		1332
1040	prepare_schedule (&ta);	1333	prepare_schedule (aTHX_ &ta);
1041	TRANSFER (ta);	1334	TRANSFER (ta);
1042	}	1335	}
1043		1336
1044	static void	1337	static int
1045	api_cede (void)	1338	api_cede (void)
1046	{	1339	{
		1340	dTHX;
1047	struct transfer_args ta;	1341	struct transfer_args ta;
1048		1342
1049	prepare_cede (&ta);	1343	prepare_cede (aTHX_ &ta);
		1344
		1345	if (expect_true (ta.prev != ta.next))
		1346	{
1050	TRANSFER (ta);	1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
1051	}	1352	}
1052		1353
		1354	static int
		1355	api_cede_notself (void)
		1356	{
		1357	dTHX;
		1358	struct transfer_args ta;
		1359
		1360	if (prepare_cede_notself (aTHX_ &ta))
		1361	{
		1362	TRANSFER (ta);
		1363	return 1;
		1364	}
		1365	else
		1366	return 0;
		1367	}
		1368
		1369	static void
		1370	api_trace (SV *coro_sv, int flags)
		1371	{
		1372	dTHX;
		1373	struct coro *coro = SvSTATE (coro_sv);
		1374
		1375	if (flags & CC_TRACE)
		1376	{
		1377	if (!coro->cctx)
		1378	coro->cctx = cctx_new ();
		1379	else if (!(coro->cctx->flags & CC_TRACE))
		1380	croak ("cannot enable tracing on coroutine with custom stack");
		1381
		1382	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1383	}
		1384	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1385	{
		1386	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1387
		1388	if (coro->flags & CF_RUNNING)
		1389	PL_runops = RUNOPS_DEFAULT;
		1390	else
		1391	coro->runops = RUNOPS_DEFAULT;
		1392	}
		1393	}
		1394
1053	MODULE = Coro::State PACKAGE = Coro::State	1395	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1054		1396
1055	PROTOTYPES: DISABLE	1397	PROTOTYPES: DISABLE
1056		1398
1057	BOOT:	1399	BOOT:
1058	{	1400	{
1059	#ifdef USE_ITHREADS	1401	#ifdef USE_ITHREADS
1060	MUTEX_INIT (&coro_mutex);	1402	MUTEX_INIT (&coro_mutex);
1061	#endif	1403	#endif
1062	BOOT_PAGESIZE;	1404	BOOT_PAGESIZE;
1063		1405
		1406	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1407	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1408
1064	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1409	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1065		1410
		1411	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1412	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1066	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1413	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1067	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1068	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1069	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1070	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1414	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1071		1415
1072	main_mainstack = PL_mainstack;	1416	main_mainstack = PL_mainstack;
		1417	main_top_env = PL_top_env;
		1418
		1419	while (main_top_env->je_prev)
		1420	main_top_env = main_top_env->je_prev;
1073		1421
1074	coroapi.ver = CORO_API_VERSION;	1422	coroapi.ver = CORO_API_VERSION;
1075	coroapi.transfer = api_transfer;	1423	coroapi.transfer = api_transfer;
1076		1424
1077	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1425	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1084	struct coro *coro;	1432	struct coro *coro;
1085	HV *hv;	1433	HV *hv;
1086	int i;	1434	int i;
1087		1435
1088	Newz (0, coro, 1, struct coro);	1436	Newz (0, coro, 1, struct coro);
1089	coro->args = newAV ();	1437	coro->args = newAV ();
1090	coro->save = CORO_SAVE_ALL;
1091	coro->flags = CF_NEW;	1438	coro->flags = CF_NEW;
1092		1439
		1440	if (coro_first) coro_first->prev = coro;
		1441	coro->next = coro_first;
		1442	coro_first = coro;
		1443
1093	hv = newHV ();	1444	coro->hv = hv = newHV ();
1094	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1445	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1095	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1446	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1096		1447
		1448	av_extend (coro->args, items - 1);
1097	for (i = 1; i < items; i++)	1449	for (i = 1; i < items; i++)
1098	av_push (coro->args, newSVsv (ST (i)));	1450	av_push (coro->args, newSVsv (ST (i)));
1099	}	1451	}
1100	OUTPUT:	1452	OUTPUT:
1101	RETVAL	1453	RETVAL
1102		1454
1103	int	1455	# these not obviously related functions are all rolled into the same xs
1104	save (SV *coro, int new_save = -1)	1456	# function to increase chances that they all will call transfer with the same
1105	CODE:	1457	# stack offset
1106	RETVAL = api_save (coro, new_save);
1107	OUTPUT:
1108	RETVAL
1109
1110	void	1458	void
1111	_set_stacklevel (...)	1459	_set_stacklevel (...)
1112	ALIAS:	1460	ALIAS:
1113	Coro::State::transfer = 1	1461	Coro::State::transfer = 1
1114	Coro::schedule = 2	1462	Coro::schedule = 2
1115	Coro::cede = 3	1463	Coro::cede = 3
		1464	Coro::cede_notself = 4
1116	CODE:	1465	CODE:
1117	{	1466	{
1118	struct transfer_args ta;	1467	struct transfer_args ta;
1119		1468
1120	switch (ix)	1469	switch (ix)
…		…
1126		1475
1127	case 1:	1476	case 1:
1128	if (items != 2)	1477	if (items != 2)
1129	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1478	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1130		1479
1131	prepare_transfer (&ta, ST (0), ST (1));	1480	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1132	break;	1481	break;
1133		1482
1134	case 2:	1483	case 2:
1135	prepare_schedule (&ta);	1484	prepare_schedule (aTHX_ &ta);
1136	break;	1485	break;
1137		1486
1138	case 3:	1487	case 3:
1139	prepare_cede (&ta);	1488	prepare_cede (aTHX_ &ta);
		1489	break;
		1490
		1491	case 4:
		1492	if (!prepare_cede_notself (aTHX_ &ta))
		1493	XSRETURN_EMPTY;
		1494
1140	break;	1495	break;
1141	}	1496	}
1142		1497
		1498	BARRIER;
1143	TRANSFER (ta);	1499	TRANSFER (ta);
1144	}
1145		1500
1146	void	1501	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1147	_clone_state_from (SV *dst, SV *src)	1502	XSRETURN_YES;
		1503	}
		1504
		1505	bool
		1506	_destroy (SV *coro_sv)
1148	CODE:	1507	CODE:
1149	{	1508	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1150	struct coro *coro_src = SvSTATE (src);	1509	OUTPUT:
1151		1510	RETVAL
1152	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1153
1154	++coro_src->refcnt;
1155	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1156	}
1157		1511
1158	void	1512	void
1159	_exit (code)	1513	_exit (code)
1160	int code	1514	int code
1161	PROTOTYPE: $	1515	PROTOTYPE: $
1162	CODE:	1516	CODE:
1163	_exit (code);	1517	_exit (code);
1164		1518
1165	int	1519	int
		1520	cctx_stacksize (int new_stacksize = 0)
		1521	CODE:
		1522	RETVAL = coro_stacksize;
		1523	if (new_stacksize)
		1524	coro_stacksize = new_stacksize;
		1525	OUTPUT:
		1526	RETVAL
		1527
		1528	int
1166	cctx_count ()	1529	cctx_count ()
1167	CODE:	1530	CODE:
1168	RETVAL = cctx_count;	1531	RETVAL = cctx_count;
1169	OUTPUT:	1532	OUTPUT:
1170	RETVAL	1533	RETVAL
…		…
1174	CODE:	1537	CODE:
1175	RETVAL = cctx_idle;	1538	RETVAL = cctx_idle;
1176	OUTPUT:	1539	OUTPUT:
1177	RETVAL	1540	RETVAL
1178		1541
		1542	void
		1543	list ()
		1544	PPCODE:
		1545	{
		1546	struct coro *coro;
		1547	for (coro = coro_first; coro; coro = coro->next)
		1548	if (coro->hv)
		1549	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1550	}
		1551
		1552	void
		1553	call (Coro::State coro, SV *coderef)
		1554	ALIAS:
		1555	eval = 1
		1556	CODE:
		1557	{
		1558	if (coro->mainstack)
		1559	{
		1560	struct coro temp;
		1561	Zero (&temp, 1, struct coro);
		1562
		1563	if (!(coro->flags & CF_RUNNING))
		1564	{
		1565	save_perl (aTHX_ &temp);
		1566	load_perl (aTHX_ coro);
		1567	}
		1568
		1569	{
		1570	dSP;
		1571	ENTER;
		1572	SAVETMPS;
		1573	PUSHMARK (SP);
		1574	PUTBACK;
		1575	if (ix)
		1576	eval_sv (coderef, 0);
		1577	else
		1578	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1579	SPAGAIN;
		1580	FREETMPS;
		1581	LEAVE;
		1582	PUTBACK;
		1583	}
		1584
		1585	if (!(coro->flags & CF_RUNNING))
		1586	{
		1587	save_perl (aTHX_ coro);
		1588	load_perl (aTHX_ &temp);
		1589	}
		1590	}
		1591	}
		1592
		1593	SV *
		1594	is_ready (Coro::State coro)
		1595	PROTOTYPE: $
		1596	ALIAS:
		1597	is_ready = CF_READY
		1598	is_running = CF_RUNNING
		1599	is_new = CF_NEW
		1600	is_destroyed = CF_DESTROYED
		1601	CODE:
		1602	RETVAL = boolSV (coro->flags & ix);
		1603	OUTPUT:
		1604	RETVAL
		1605
		1606	void
		1607	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1608
		1609	SV *
		1610	has_stack (Coro::State coro)
		1611	PROTOTYPE: $
		1612	CODE:
		1613	RETVAL = boolSV (!!coro->cctx);
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	int
		1618	is_traced (Coro::State coro)
		1619	PROTOTYPE: $
		1620	CODE:
		1621	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1622	OUTPUT:
		1623	RETVAL
		1624
		1625	IV
		1626	rss (Coro::State coro)
		1627	PROTOTYPE: $
		1628	ALIAS:
		1629	usecount = 1
		1630	CODE:
		1631	switch (ix)
		1632	{
		1633	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1634	case 1: RETVAL = coro->usecount; break;
		1635	}
		1636	OUTPUT:
		1637	RETVAL
		1638
		1639
1179	MODULE = Coro::State PACKAGE = Coro	1640	MODULE = Coro::State PACKAGE = Coro
1180		1641
1181	BOOT:	1642	BOOT:
1182	{	1643	{
1183	int i;	1644	int i;
		1645
		1646	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1647	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1648	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1649
		1650	coro_current = get_sv ("Coro::current", FALSE);
		1651	SvREADONLY_on (coro_current);
1184		1652
1185	coro_stash = gv_stashpv ("Coro", TRUE);	1653	coro_stash = gv_stashpv ("Coro", TRUE);
1186		1654
1187	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1655	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1188	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1656	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1189	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1657	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1190	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1658	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1191	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1659	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1192	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1660	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1193		1661
1194	coro_current = get_sv ("Coro::current", FALSE);
1195	SvREADONLY_on (coro_current);
1196
1197	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1662	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1198	coro_ready[i] = newAV ();	1663	coro_ready[i] = newAV ();
1199		1664
1200	{	1665	{
1201	SV *sv = perl_get_sv("Coro::API", 1);	1666	SV *sv = perl_get_sv("Coro::API", 1);
1202		1667
1203	coroapi.schedule = api_schedule;	1668	coroapi.schedule = api_schedule;
1204	coroapi.save = api_save;
1205	coroapi.cede = api_cede;	1669	coroapi.cede = api_cede;
		1670	coroapi.cede_notself = api_cede_notself;
1206	coroapi.ready = api_ready;	1671	coroapi.ready = api_ready;
1207	coroapi.is_ready = api_is_ready;	1672	coroapi.is_ready = api_is_ready;
1208	coroapi.nready = &coro_nready;	1673	coroapi.nready = &coro_nready;
1209	coroapi.current = coro_current;	1674	coroapi.current = coro_current;
1210		1675
1211	GCoroAPI = &coroapi;	1676	GCoroAPI = &coroapi;
1212	sv_setiv (sv, (IV)&coroapi);	1677	sv_setiv (sv, (IV)&coroapi);
1213	SvREADONLY_on (sv);	1678	SvREADONLY_on (sv);
1214	}	1679	}
…		…
1230	RETVAL = coro->prio;	1695	RETVAL = coro->prio;
1231		1696
1232	if (items > 1)	1697	if (items > 1)
1233	{	1698	{
1234	if (ix)	1699	if (ix)
1235	newprio += coro->prio;	1700	newprio = coro->prio - newprio;
1236		1701
1237	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1702	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1238	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1703	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1239		1704
1240	coro->prio = newprio;	1705	coro->prio = newprio;
1241	}	1706	}
1242	}	1707	}
		1708	OUTPUT:
		1709	RETVAL
1243		1710
1244	SV *	1711	SV *
1245	ready (SV *self)	1712	ready (SV *self)
1246	PROTOTYPE: $	1713	PROTOTYPE: $
1247	CODE:	1714	CODE:
1248	RETVAL = boolSV (api_ready (self));	1715	RETVAL = boolSV (api_ready (self));
1249	OUTPUT:	1716	OUTPUT:
1250	RETVAL	1717	RETVAL
1251		1718
1252	SV *
1253	is_ready (SV *self)
1254	PROTOTYPE: $
1255	CODE:
1256	RETVAL = boolSV (api_is_ready (self));
1257	OUTPUT:
1258	RETVAL
1259
1260	int	1719	int
1261	nready (...)	1720	nready (...)
1262	PROTOTYPE:	1721	PROTOTYPE:
1263	CODE:	1722	CODE:
1264	RETVAL = coro_nready;	1723	RETVAL = coro_nready;
1265	OUTPUT:	1724	OUTPUT:
1266	RETVAL	1725	RETVAL
1267		1726
		1727	# for async_pool speedup
		1728	void
		1729	_pool_1 (SV *cb)
		1730	CODE:
		1731	{
		1732	struct coro *coro = SvSTATE (coro_current);
		1733	HV *hv = (HV *)SvRV (coro_current);
		1734	AV *defav = GvAV (PL_defgv);
		1735	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1736	AV *invoke_av;
		1737	int i, len;
		1738
		1739	if (!invoke)
		1740	croak ("\3terminate\2\n");
		1741
		1742	SvREFCNT_dec (coro->saved_deffh);
		1743	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1744
		1745	hv_store (hv, "desc", sizeof ("desc") - 1,
		1746	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1747
		1748	invoke_av = (AV *)SvRV (invoke);
		1749	len = av_len (invoke_av);
		1750
		1751	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1752
		1753	if (len > 0)
		1754	{
		1755	av_fill (defav, len - 1);
		1756	for (i = 0; i < len; ++i)
		1757	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1758	}
		1759
		1760	SvREFCNT_dec (invoke);
		1761	}
		1762
		1763	void
		1764	_pool_2 (SV *cb)
		1765	CODE:
		1766	{
		1767	struct coro *coro = SvSTATE (coro_current);
		1768
		1769	sv_setsv (cb, &PL_sv_undef);
		1770
		1771	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1772	coro->saved_deffh = 0;
		1773
		1774	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1775	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1776	croak ("\3terminate\2\n");
		1777
		1778	av_clear (GvAV (PL_defgv));
		1779	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1780	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1781
		1782	coro->prio = 0;
		1783
		1784	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1785	api_trace (coro_current, 0);
		1786
		1787	av_push (av_async_pool, newSVsv (coro_current));
		1788	}
		1789
		1790
1268	MODULE = Coro::State PACKAGE = Coro::AIO	1791	MODULE = Coro::State PACKAGE = Coro::AIO
1269		1792
1270	SV *	1793	SV *
1271	_get_state ()	1794	_get_state ()
1272	CODE:	1795	CODE:

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