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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.120 by root, Sat Dec 2 18:01:30 2006 UTC vs.
Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
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>	12	#include <stdio.h>
44	#include <errno.h>	13	#include <errno.h>
45		14	#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		15
54	#ifdef HAVE_MMAP	16	#ifdef HAVE_MMAP
55	# include <unistd.h>	17	# include <unistd.h>
56	# include <sys/mman.h>	18	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	19	# ifndef MAP_ANONYMOUS
…		…
72	#else	34	#else
73	# define PAGESIZE 0	35	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	36	# define BOOT_PAGESIZE (void)0
75	#endif	37	#endif
76		38
77	/* The next macro should declare a variable stacklevel that contains and approximation	39	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	40	# include <valgrind/valgrind.h>
79	* and should be unique. */	41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	|| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
		56	# ifndef PL_ppaddr
		57	# define PL_ppaddr ppaddr
		58	# endif
		59	# ifndef call_sv
		60	# define call_sv perl_call_sv
		61	# endif
		62	# ifndef get_sv
		63	# define get_sv perl_get_sv
		64	# endif
		65	# ifndef get_cv
		66	# define get_cv perl_get_cv
		67	# endif
		68	# ifndef IS_PADGV
		69	# define IS_PADGV(v) 0
		70	# endif
		71	# ifndef IS_PADCONST
		72	# define IS_PADCONST(v) 0
		73	# endif
		74	#endif
		75
		76	/* 5.8.7 */
		77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
		89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		90	# undef CORO_STACKGUARD
		91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
80	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
82		106
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		108
85	#if __GNUC__ >= 3	109	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
87	#else	113	#else
88	# define attribute(x)	114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
89	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
90		121
91	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
92		123
93	#include "CoroAPI.h"	124	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		125
97	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	130	#else
102	# define LOCK (void)0	131	# define LOCK (void)0
103	# define UNLOCK (void)0	132	# define UNLOCK (void)0
104	#endif	133	#endif
105		134
		135	/* helper storage struct for Coro::AIO */
106	struct io_state	136	struct io_state
107	{	137	{
108	int errorno;	138	int errorno;
109	I32 laststype;	139	I32 laststype;
110	int laststatval;	140	int laststatval;
111	Stat_t statcache;	141	Stat_t statcache;
112	};	142	};
113		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
114	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
115	static AV *main_mainstack; /* used to differentiate between $main and others */	146	static AV *main_mainstack; /* used to differentiate between $main and others */
		147	static JMPENV *main_top_env;
116	static HV *coro_state_stash, *coro_stash;	148	static HV *coro_state_stash, *coro_stash;
117	static SV *coro_mortal; /* will be freed after next transfer */	149	static SV *coro_mortal; /* will be freed after next transfer */
118		150
		151	static GV *irsgv; /* $/ */
		152	static GV *stdoutgv; /* *STDOUT */
		153	static SV *sv_diehook;
		154	static SV *sv_warnhook;
		155
		156	/* async_pool helper stuff */
		157	static SV *sv_pool_rss;
		158	static SV *sv_pool_size;
		159	static AV *av_async_pool;
		160
119	static struct coro_cctx *cctx_first;	161	static struct coro_cctx *cctx_first;
120	static int cctx_count, cctx_idle;	162	static int cctx_count, cctx_idle;
		163
		164	enum {
		165	CC_MAPPED = 0x01,
		166	CC_NOREUSE = 0x02, /* throw this away after tracing */
		167	CC_TRACE = 0x04,
		168	CC_TRACE_SUB = 0x08, /* trace sub calls */
		169	CC_TRACE_LINE = 0x10, /* trace each statement */
		170	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		171	};
121		172
122	/* this is a structure representing a c-level coroutine */	173	/* this is a structure representing a c-level coroutine */
123	typedef struct coro_cctx {	174	typedef struct coro_cctx {
124	struct coro_cctx *next;	175	struct coro_cctx *next;
125		176
126	/* the stack */	177	/* the stack */
127	void *sptr;	178	void *sptr;
128	long ssize; /* positive == mmap, otherwise malloc */	179	size_t ssize;
129		180
130	/* cpu state */	181	/* cpu state */
131	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	182	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		183	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
132	JMPENV *top_env;	184	JMPENV *top_env;
133	coro_context cctx;	185	coro_context cctx;
134		186
135	int inuse;
136
137	#if USE_VALGRIND	187	#if CORO_USE_VALGRIND
138	int valgrind_id;	188	int valgrind_id;
139	#endif	189	#endif
		190	unsigned char flags;
140	} coro_cctx;	191	} coro_cctx;
141		192
142	enum {	193	enum {
143	CF_RUNNING = 0x0001, /* coroutine is running */	194	CF_RUNNING = 0x0001, /* coroutine is running */
144	CF_READY = 0x0002, /* coroutine is ready */	195	CF_READY = 0x0002, /* coroutine is ready */
145	CF_NEW = 0x0004, /* ahs never been switched to */	196	CF_NEW = 0x0004, /* has never been switched to */
		197	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
146	};	198	};
		199
		200	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		201	typedef struct {
		202	SV *defsv;
		203	AV *defav;
		204	SV *errsv;
		205	SV *irsgv;
		206	#define VAR(name,type) type name;
		207	# include "state.h"
		208	#undef VAR
		209	} perl_slots;
		210
		211	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
147		212
148	/* this is a structure representing a perl-level coroutine */	213	/* this is a structure representing a perl-level coroutine */
149	struct coro {	214	struct coro {
150	/* the c coroutine allocated to this perl coroutine, if any */	215	/* the c coroutine allocated to this perl coroutine, if any */
151	coro_cctx *cctx;	216	coro_cctx *cctx;
152		217
		218	/* process data */
		219	AV *mainstack;
		220	perl_slots *slot; /* basically the saved sp */
		221
153	/* data associated with this coroutine (initial args) */	222	/* data associated with this coroutine (initial args) */
154	AV *args;	223	AV *args;
155	int refcnt;	224	int refcnt;
156	int flags;	225	int flags; /* CF_ flags */
157		226
158	/* optionally saved, might be zero */	227	/* statistics */
159	AV *defav;	228	int usecount; /* number of transfers to this coro */
160	SV *defsv;
161	SV *errsv;
162
163	#define VAR(name,type) type name;
164	# include "state.h"
165	#undef VAR
166		229
167	/* coro process data */	230	/* coro process data */
168	int prio;	231	int prio;
		232	SV *throw;
		233
		234	/* async_pool */
		235	SV *saved_deffh;
		236
		237	/* linked list */
		238	struct coro *next, *prev;
		239	HV *hv; /* the perl hash associated with this coro, if any */
169	};	240	};
170		241
171	typedef struct coro *Coro__State;	242	typedef struct coro *Coro__State;
172	typedef struct coro *Coro__State_or_hashref;	243	typedef struct coro *Coro__State_or_hashref;
173		244
		245	/** Coro ********************************************************************/
		246
		247	#define PRIO_MAX 3
		248	#define PRIO_HIGH 1
		249	#define PRIO_NORMAL 0
		250	#define PRIO_LOW -1
		251	#define PRIO_IDLE -3
		252	#define PRIO_MIN -4
		253
		254	/* for Coro.pm */
		255	static SV *coro_current;
		256	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		257	static int coro_nready;
		258	static struct coro *coro_first;
		259
		260	/** lowlevel stuff **********************************************************/
		261
		262	static SV *
		263	coro_get_sv (const char *name, int create)
		264	{
		265	#if PERL_VERSION_ATLEAST (5,9,0)
		266	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		267	get_sv (name, create);
		268	#endif
		269	return get_sv (name, create);
		270	}
		271
		272	static SV *
		273	coro_get_av (const char *name, int create)
		274	{
		275	#if PERL_VERSION_ATLEAST (5,9,0)
		276	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		277	get_av (name, create);
		278	#endif
		279	return get_av (name, create);
		280	}
		281
174	static AV *	282	static AV *
175	coro_clone_padlist (CV *cv)	283	coro_clone_padlist (pTHX_ CV *cv)
176	{	284	{
177	AV *padlist = CvPADLIST (cv);	285	AV *padlist = CvPADLIST (cv);
178	AV *newpadlist, *newpad;	286	AV *newpadlist, *newpad;
179		287
180	newpadlist = newAV ();	288	newpadlist = newAV ();
…		…
192		300
193	return newpadlist;	301	return newpadlist;
194	}	302	}
195		303
196	static void	304	static void
197	free_padlist (AV *padlist)	305	free_padlist (pTHX_ AV *padlist)
198	{	306	{
199	/* may be during global destruction */	307	/* may be during global destruction */
200	if (SvREFCNT (padlist))	308	if (SvREFCNT (padlist))
201	{	309	{
202	I32 i = AvFILLp (padlist);	310	I32 i = AvFILLp (padlist);
…		…
223	AV *padlist;	331	AV *padlist;
224	AV *av = (AV *)mg->mg_obj;	332	AV *av = (AV *)mg->mg_obj;
225		333
226	/* casting is fun. */	334	/* casting is fun. */
227	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	335	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
228	free_padlist (padlist);	336	free_padlist (aTHX_ padlist);
229		337
230	SvREFCNT_dec (av);	338	SvREFCNT_dec (av);
231		339
232	return 0;	340	return 0;
233	}	341	}
…		…
241	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	349	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
242	? SvMAGIC (cv) \	350	? SvMAGIC (cv) \
243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	351	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
244	: 0	352	: 0
245		353
		354	static struct coro *
		355	SvSTATE_ (pTHX_ SV *coro)
		356	{
		357	HV *stash;
		358	MAGIC *mg;
		359
		360	if (SvROK (coro))
		361	coro = SvRV (coro);
		362
		363	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		364	croak ("Coro::State object required");
		365
		366	stash = SvSTASH (coro);
		367	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		368	{
		369	/* very slow, but rare, check */
		370	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		371	croak ("Coro::State object required");
		372	}
		373
		374	mg = CORO_MAGIC (coro);
		375	return (struct coro *)mg->mg_ptr;
		376	}
		377
		378	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		379
246	/* the next two functions merely cache the padlists */	380	/* the next two functions merely cache the padlists */
247	static void	381	static void
248	get_padlist (CV *cv)	382	get_padlist (pTHX_ CV *cv)
249	{	383	{
250	MAGIC *mg = CORO_MAGIC (cv);	384	MAGIC *mg = CORO_MAGIC (cv);
251	AV *av;	385	AV *av;
252		386
253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	387	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	388	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
255	else	389	else
256	{	390	{
257	#if 0	391	#if CORO_PREFER_PERL_FUNCTIONS
258	/* this is probably cleaner, but also slower? */	392	/* this is probably cleaner, but also slower? */
259	CV *cp = Perl_cv_clone (cv);	393	CV *cp = Perl_cv_clone (cv);
260	CvPADLIST (cv) = CvPADLIST (cp);	394	CvPADLIST (cv) = CvPADLIST (cp);
261	CvPADLIST (cp) = 0;	395	CvPADLIST (cp) = 0;
262	SvREFCNT_dec (cp);	396	SvREFCNT_dec (cp);
263	#else	397	#else
264	CvPADLIST (cv) = coro_clone_padlist (cv);	398	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
265	#endif	399	#endif
266	}	400	}
267	}	401	}
268		402
269	static void	403	static void
270	put_padlist (CV *cv)	404	put_padlist (pTHX_ CV *cv)
271	{	405	{
272	MAGIC *mg = CORO_MAGIC (cv);	406	MAGIC *mg = CORO_MAGIC (cv);
273	AV *av;	407	AV *av;
274		408
275	if (!mg)	409	if (expect_false (!mg))
276	{	410	{
277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	411	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	412	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
279	mg->mg_virtual = &vtbl_coro;	413	mg->mg_virtual = &vtbl_coro;
280	mg->mg_obj = (SV *)newAV ();	414	mg->mg_obj = (SV *)newAV ();
281	}	415	}
282		416
283	av = (AV *)mg->mg_obj;	417	av = (AV *)mg->mg_obj;
284		418
285	if (AvFILLp (av) >= AvMAX (av))	419	if (expect_false (AvFILLp (av) >= AvMAX (av)))
286	av_extend (av, AvMAX (av) + 1);	420	av_extend (av, AvMAX (av) + 1);
287		421
288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	422	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
289	}	423	}
290		424
291	#define SB do {	425	/** load & save, init *******************************************************/
292	#define SE } while (0)
293		426
294	#define LOAD(state) load_state ((state))
295	#define SAVE(state,flags) save_state ((state),(flags))
296
297	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
298
299	static void	427	static void
300	load_state (Coro__State c)	428	load_perl (pTHX_ Coro__State c)
301	{	429	{
		430	perl_slots *slot = c->slot;
		431	c->slot = 0;
		432
		433	PL_mainstack = c->mainstack;
		434
		435	GvSV (PL_defgv) = slot->defsv;
		436	GvAV (PL_defgv) = slot->defav;
		437	GvSV (PL_errgv) = slot->errsv;
		438	GvSV (irsgv) = slot->irsgv;
		439
302	#define VAR(name,type) PL_ ## name = c->name;	440	#define VAR(name,type) PL_ ## name = slot->name;
303	# include "state.h"	441	# include "state.h"
304	#undef VAR	442	#undef VAR
305
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		443
310	{	444	{
311	dSP;	445	dSP;
		446
312	CV *cv;	447	CV *cv;
313		448
314	/* now do the ugly restore mess */	449	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	450	while (expect_true (cv = (CV *)POPs))
316	{	451	{
317	put_padlist (cv); /* mark this padlist as available */	452	put_padlist (aTHX_ cv); /* mark this padlist as available */
318	CvDEPTH (cv) = PTR2IV (POPs);	453	CvDEPTH (cv) = PTR2IV (POPs);
319	CvPADLIST (cv) = (AV *)POPs;	454	CvPADLIST (cv) = (AV *)POPs;
320	}	455	}
321		456
322	PUTBACK;	457	PUTBACK;
323	}	458	}
324	}	459	}
325		460
326	static void	461	static void
327	save_state (Coro__State c, int flags)	462	save_perl (pTHX_ Coro__State c)
328	{	463	{
329	{	464	{
330	dSP;	465	dSP;
331	I32 cxix = cxstack_ix;	466	I32 cxix = cxstack_ix;
332	PERL_CONTEXT *ccstk = cxstack;	467	PERL_CONTEXT *ccstk = cxstack;
…		…
335	/*	470	/*
336	* the worst thing you can imagine happens first - we have to save	471	* the worst thing you can imagine happens first - we have to save
337	* (and reinitialize) all cv's in the whole callchain :(	472	* (and reinitialize) all cv's in the whole callchain :(
338	*/	473	*/
339		474
340	PUSHs (Nullsv);	475	XPUSHs (Nullsv);
341	/* this loop was inspired by pp_caller */	476	/* this loop was inspired by pp_caller */
342	for (;;)	477	for (;;)
343	{	478	{
344	while (cxix >= 0)	479	while (expect_true (cxix >= 0))
345	{	480	{
346	PERL_CONTEXT *cx = &ccstk[cxix--];	481	PERL_CONTEXT *cx = &ccstk[cxix--];
347		482
348	if (CxTYPE (cx) == CXt_SUB)	483	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
349	{	484	{
350	CV *cv = cx->blk_sub.cv;	485	CV *cv = cx->blk_sub.cv;
351		486
352	if (CvDEPTH (cv))	487	if (expect_true (CvDEPTH (cv)))
353	{	488	{
354	EXTEND (SP, 3);	489	EXTEND (SP, 3);
355
356	PUSHs ((SV *)CvPADLIST (cv));	490	PUSHs ((SV *)CvPADLIST (cv));
357	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	491	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
358	PUSHs ((SV *)cv);	492	PUSHs ((SV *)cv);
359		493
360	CvDEPTH (cv) = 0;	494	CvDEPTH (cv) = 0;
361	get_padlist (cv);	495	get_padlist (aTHX_ cv);
362	}	496	}
363	}	497	}
364	#ifdef CXt_FORMAT
365	else if (CxTYPE (cx) == CXt_FORMAT)
366	{
367	/* I never used formats, so how should I know how these are implemented? */
368	/* my bold guess is as a simple, plain sub... */
369	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
370	}
371	#endif
372	}	498	}
373		499
374	if (top_si->si_type == PERLSI_MAIN)	500	if (expect_true (top_si->si_type == PERLSI_MAIN))
375	break;	501	break;
376		502
377	top_si = top_si->si_prev;	503	top_si = top_si->si_prev;
378	ccstk = top_si->si_cxstack;	504	ccstk = top_si->si_cxstack;
379	cxix = top_si->si_cxix;	505	cxix = top_si->si_cxix;
380	}	506	}
381		507
382	PUTBACK;	508	PUTBACK;
383	}	509	}
384		510
385	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	511	/* allocate some space on the context stack for our purposes */
386	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	512	{
387	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	513	/* we manually unroll here, as usually 2 slots is enough */
		514	int i;
		515	if (SLOT_COUNT >= 1) CXINC;
		516	if (SLOT_COUNT >= 2) CXINC;
		517	if (SLOT_COUNT >= 3) CXINC;
		518	for (i = 3; i < SLOT_COUNT; ++i)
		519	CXINC;
388		520
		521	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		522	}
		523
		524	c->mainstack = PL_mainstack;
		525
		526	{
		527	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		528
		529	slot->defav = GvAV (PL_defgv);
		530	slot->defsv = DEFSV;
		531	slot->errsv = ERRSV;
		532	slot->irsgv = GvSV (irsgv);
		533
389	#define VAR(name,type)c->name = PL_ ## name;	534	#define VAR(name,type) slot->name = PL_ ## name;
390	# include "state.h"	535	# include "state.h"
391	#undef VAR	536	#undef VAR
		537	}
392	}	538	}
393		539
394	/*	540	/*
395	* allocate various perl stacks. This is an exact copy	541	* allocate various perl stacks. This is an exact copy
396	* of perl.c:init_stacks, except that it uses less memory	542	* of perl.c:init_stacks, except that it uses less memory
397	* on the (sometimes correct) assumption that coroutines do	543	* on the (sometimes correct) assumption that coroutines do
398	* not usually need a lot of stackspace.	544	* not usually need a lot of stackspace.
399	*/	545	*/
		546	#if CORO_PREFER_PERL_FUNCTIONS
		547	# define coro_init_stacks init_stacks
		548	#else
400	static void	549	static void
401	coro_init_stacks ()	550	coro_init_stacks (pTHX)
402	{	551	{
403	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	552	PL_curstackinfo = new_stackinfo(32, 8);
404	PL_curstackinfo->si_type = PERLSI_MAIN;	553	PL_curstackinfo->si_type = PERLSI_MAIN;
405	PL_curstack = PL_curstackinfo->si_stack;	554	PL_curstack = PL_curstackinfo->si_stack;
406	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	555	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
407		556
408	PL_stack_base = AvARRAY(PL_curstack);	557	PL_stack_base = AvARRAY(PL_curstack);
409	PL_stack_sp = PL_stack_base;	558	PL_stack_sp = PL_stack_base;
410	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	559	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
411		560
412	New(50,PL_tmps_stack,128,SV*);	561	New(50,PL_tmps_stack,32,SV*);
413	PL_tmps_floor = -1;	562	PL_tmps_floor = -1;
414	PL_tmps_ix = -1;	563	PL_tmps_ix = -1;
415	PL_tmps_max = 128;	564	PL_tmps_max = 32;
416		565
417	New(54,PL_markstack,32,I32);	566	New(54,PL_markstack,16,I32);
418	PL_markstack_ptr = PL_markstack;	567	PL_markstack_ptr = PL_markstack;
419	PL_markstack_max = PL_markstack + 32;	568	PL_markstack_max = PL_markstack + 16;
420		569
421	#ifdef SET_MARK_OFFSET	570	#ifdef SET_MARK_OFFSET
422	SET_MARK_OFFSET;	571	SET_MARK_OFFSET;
423	#endif	572	#endif
424		573
425	New(54,PL_scopestack,32,I32);	574	New(54,PL_scopestack,8,I32);
426	PL_scopestack_ix = 0;	575	PL_scopestack_ix = 0;
427	PL_scopestack_max = 32;	576	PL_scopestack_max = 8;
428		577
429	New(54,PL_savestack,64,ANY);	578	New(54,PL_savestack,24,ANY);
430	PL_savestack_ix = 0;	579	PL_savestack_ix = 0;
431	PL_savestack_max = 64;	580	PL_savestack_max = 24;
432		581
433	#if !PERL_VERSION_ATLEAST (5,9,0)	582	#if !PERL_VERSION_ATLEAST (5,9,0)
434	New(54,PL_retstack,16,OP*);	583	New(54,PL_retstack,4,OP*);
435	PL_retstack_ix = 0;	584	PL_retstack_ix = 0;
436	PL_retstack_max = 16;	585	PL_retstack_max = 4;
437	#endif	586	#endif
438	}	587	}
		588	#endif
439		589
440	/*	590	/*
441	* destroy the stacks, the callchain etc...	591	* destroy the stacks, the callchain etc...
442	*/	592	*/
443	static void	593	static void
444	coro_destroy_stacks ()	594	coro_destroy_stacks (pTHX)
445	{	595	{
446	if (!IN_DESTRUCT)
447	{
448	/* is this ugly, I ask? */
449	LEAVE_SCOPE (0);
450
451	/* sure it is, but more important: is it correct?? :/ */
452	FREETMPS;
453
454	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
455	}
456
457	while (PL_curstackinfo->si_next)	596	while (PL_curstackinfo->si_next)
458	PL_curstackinfo = PL_curstackinfo->si_next;	597	PL_curstackinfo = PL_curstackinfo->si_next;
459		598
460	while (PL_curstackinfo)	599	while (PL_curstackinfo)
461	{	600	{
462	PERL_SI *p = PL_curstackinfo->si_prev;	601	PERL_SI *p = PL_curstackinfo->si_prev;
463		602
464	{ /*D*//*remove*/
465	dSP;
466	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
467	PUTBACK; /* possibly superfluous */
468	}
469
470	if (!IN_DESTRUCT)	603	if (!IN_DESTRUCT)
471	{
472	dounwind (-1);/*D*//*remove*/
473	SvREFCNT_dec (PL_curstackinfo->si_stack);	604	SvREFCNT_dec (PL_curstackinfo->si_stack);
474	}
475		605
476	Safefree (PL_curstackinfo->si_cxstack);	606	Safefree (PL_curstackinfo->si_cxstack);
477	Safefree (PL_curstackinfo);	607	Safefree (PL_curstackinfo);
478	PL_curstackinfo = p;	608	PL_curstackinfo = p;
479	}	609	}
…		…
485	#if !PERL_VERSION_ATLEAST (5,9,0)	615	#if !PERL_VERSION_ATLEAST (5,9,0)
486	Safefree (PL_retstack);	616	Safefree (PL_retstack);
487	#endif	617	#endif
488	}	618	}
489		619
490	static void	620	static size_t
491	setup_coro (struct coro *coro)	621	coro_rss (pTHX_ struct coro *coro)
		622	{
		623	size_t rss = sizeof (*coro);
		624
		625	if (coro->mainstack)
		626	{
		627	perl_slots tmp_slot;
		628	perl_slots *slot;
		629
		630	if (coro->flags & CF_RUNNING)
		631	{
		632	slot = &tmp_slot;
		633
		634	#define VAR(name,type) slot->name = PL_ ## name;
		635	# include "state.h"
		636	#undef VAR
		637	}
		638	else
		639	slot = coro->slot;
		640
		641	rss += sizeof (slot->curstackinfo);
		642	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		643	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		644	rss += slot->tmps_max * sizeof (SV *);
		645	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		646	rss += slot->scopestack_max * sizeof (I32);
		647	rss += slot->savestack_max * sizeof (ANY);
		648
		649	#if !PERL_VERSION_ATLEAST (5,9,0)
		650	rss += slot->retstack_max * sizeof (OP *);
		651	#endif
		652	}
		653
		654	return rss;
		655	}
		656
		657	/** coroutine stack handling ************************************************/
		658
		659	static void
		660	coro_setup (pTHX_ struct coro *coro)
492	{	661	{
493	/*	662	/*
494	* emulate part of the perl startup here.	663	* emulate part of the perl startup here.
495	*/	664	*/
496
497	coro_init_stacks ();	665	coro_init_stacks (aTHX);
498		666
		667	PL_runops = RUNOPS_DEFAULT;
499	PL_curcop = &PL_compiling;	668	PL_curcop = &PL_compiling;
500	PL_in_eval = EVAL_NULL;	669	PL_in_eval = EVAL_NULL;
		670	PL_comppad = 0;
501	PL_curpm = 0;	671	PL_curpm = 0;
		672	PL_curpad = 0;
502	PL_localizing = 0;	673	PL_localizing = 0;
503	PL_dirty = 0;	674	PL_dirty = 0;
504	PL_restartop = 0;	675	PL_restartop = 0;
		676	PL_diehook = SvREFCNT_inc (sv_diehook);
		677	PL_warnhook = SvREFCNT_inc (sv_warnhook);
		678
		679	GvSV (PL_defgv) = newSV (0);
		680	GvAV (PL_defgv) = coro->args; coro->args = 0;
		681	GvSV (PL_errgv) = newSV (0);
		682	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		683	PL_rs = newSVsv (GvSV (irsgv));
		684	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
505		685
506	{	686	{
507	dSP;	687	dSP;
508	LOGOP myop;	688	LOGOP myop;
509		689
510	SvREFCNT_dec (GvAV (PL_defgv));
511	GvAV (PL_defgv) = coro->args; coro->args = 0;
512
513	Zero (&myop, 1, LOGOP);	690	Zero (&myop, 1, LOGOP);
514	myop.op_next = Nullop;	691	myop.op_next = Nullop;
515	myop.op_flags = OPf_WANT_VOID;	692	myop.op_flags = OPf_WANT_VOID;
516		693
517	PUSHMARK (SP);	694	PUSHMARK (SP);
518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	695	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
519	PUTBACK;	696	PUTBACK;
520	PL_op = (OP *)&myop;	697	PL_op = (OP *)&myop;
521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	698	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
522	SPAGAIN;	699	SPAGAIN;
523	}	700	}
524		701
525	ENTER; /* necessary e.g. for dounwind */	702	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
526	}	703	}
527		704
528	static void	705	static void
		706	coro_destroy (pTHX_ struct coro *coro)
		707	{
		708	if (!IN_DESTRUCT)
		709	{
		710	/* restore all saved variables and stuff */
		711	LEAVE_SCOPE (0);
		712	assert (PL_tmps_floor == -1);
		713
		714	/* free all temporaries */
		715	FREETMPS;
		716	assert (PL_tmps_ix == -1);
		717
		718	/* unwind all extra stacks */
		719	POPSTACK_TO (PL_mainstack);
		720
		721	/* unwind main stack */
		722	dounwind (-1);
		723	}
		724
		725	SvREFCNT_dec (GvSV (PL_defgv));
		726	SvREFCNT_dec (GvAV (PL_defgv));
		727	SvREFCNT_dec (GvSV (PL_errgv));
		728	SvREFCNT_dec (PL_defoutgv);
		729	SvREFCNT_dec (PL_rs);
		730	SvREFCNT_dec (GvSV (irsgv));
		731
		732	SvREFCNT_dec (PL_diehook);
		733	SvREFCNT_dec (PL_warnhook);
		734
		735	SvREFCNT_dec (coro->saved_deffh);
		736	SvREFCNT_dec (coro->throw);
		737
		738	coro_destroy_stacks (aTHX);
		739	}
		740
		741	static void
529	free_coro_mortal ()	742	free_coro_mortal (pTHX)
530	{	743	{
531	if (coro_mortal)	744	if (expect_true (coro_mortal))
532	{	745	{
533	SvREFCNT_dec (coro_mortal);	746	SvREFCNT_dec (coro_mortal);
534	coro_mortal = 0;	747	coro_mortal = 0;
535	}	748	}
536	}	749	}
537		750
		751	static int
		752	runops_trace (pTHX)
		753	{
		754	COP *oldcop = 0;
		755	int oldcxix = -2;
		756	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		757	coro_cctx *cctx = coro->cctx;
		758
		759	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		760	{
		761	PERL_ASYNC_CHECK ();
		762
		763	if (cctx->flags & CC_TRACE_ALL)
		764	{
		765	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		766	{
		767	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		768	SV **bot, **top;
		769	AV *av = newAV (); /* return values */
		770	SV **cb;
		771	dSP;
		772
		773	GV *gv = CvGV (cx->blk_sub.cv);
		774	SV *fullname = sv_2mortal (newSV (0));
		775	if (isGV (gv))
		776	gv_efullname3 (fullname, gv, 0);
		777
		778	bot = PL_stack_base + cx->blk_oldsp + 1;
		779	top = cx->blk_gimme == G_ARRAY ? SP + 1
		780	: cx->blk_gimme == G_SCALAR ? bot + 1
		781	: bot;
		782
		783	av_extend (av, top - bot);
		784	while (bot < top)
		785	av_push (av, SvREFCNT_inc (*bot++));
		786
		787	PL_runops = RUNOPS_DEFAULT;
		788	ENTER;
		789	SAVETMPS;
		790	EXTEND (SP, 3);
		791	PUSHMARK (SP);
		792	PUSHs (&PL_sv_no);
		793	PUSHs (fullname);
		794	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		795	PUTBACK;
		796	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		797	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		798	SPAGAIN;
		799	FREETMPS;
		800	LEAVE;
		801	PL_runops = runops_trace;
		802	}
		803
		804	if (oldcop != PL_curcop)
		805	{
		806	oldcop = PL_curcop;
		807
		808	if (PL_curcop != &PL_compiling)
		809	{
		810	SV **cb;
		811
		812	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		813	{
		814	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		815
		816	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		817	{
		818	runops_proc_t old_runops = PL_runops;
		819	dSP;
		820	GV *gv = CvGV (cx->blk_sub.cv);
		821	SV *fullname = sv_2mortal (newSV (0));
		822
		823	if (isGV (gv))
		824	gv_efullname3 (fullname, gv, 0);
		825
		826	PL_runops = RUNOPS_DEFAULT;
		827	ENTER;
		828	SAVETMPS;
		829	EXTEND (SP, 3);
		830	PUSHMARK (SP);
		831	PUSHs (&PL_sv_yes);
		832	PUSHs (fullname);
		833	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		834	PUTBACK;
		835	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		836	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		837	SPAGAIN;
		838	FREETMPS;
		839	LEAVE;
		840	PL_runops = runops_trace;
		841	}
		842
		843	oldcxix = cxstack_ix;
		844	}
		845
		846	if (cctx->flags & CC_TRACE_LINE)
		847	{
		848	dSP;
		849
		850	PL_runops = RUNOPS_DEFAULT;
		851	ENTER;
		852	SAVETMPS;
		853	EXTEND (SP, 3);
		854	PL_runops = RUNOPS_DEFAULT;
		855	PUSHMARK (SP);
		856	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		857	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		858	PUTBACK;
		859	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		860	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		861	SPAGAIN;
		862	FREETMPS;
		863	LEAVE;
		864	PL_runops = runops_trace;
		865	}
		866	}
		867	}
		868	}
		869	}
		870
		871	TAINT_NOT;
		872	return 0;
		873	}
		874
538	/* inject a fake call to Coro::State::_cctx_init into the execution */	875	/* inject a fake call to Coro::State::_cctx_init into the execution */
		876	/* _cctx_init should be careful, as it could be called at almost any time */
		877	/* during execution of a perl program */
539	static void NOINLINE	878	static void NOINLINE
540	prepare_cctx (coro_cctx *cctx)	879	prepare_cctx (pTHX_ coro_cctx *cctx)
541	{	880	{
542	dSP;	881	dSP;
543	LOGOP myop;	882	LOGOP myop;
		883
		884	PL_top_env = &PL_start_env;
		885
		886	if (cctx->flags & CC_TRACE)
		887	PL_runops = runops_trace;
544		888
545	Zero (&myop, 1, LOGOP);	889	Zero (&myop, 1, LOGOP);
546	myop.op_next = PL_op;	890	myop.op_next = PL_op;
547	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	891	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
548		892
…		…
554	PL_op = (OP *)&myop;	898	PL_op = (OP *)&myop;
555	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	899	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
556	SPAGAIN;	900	SPAGAIN;
557	}	901	}
558		902
		903	/*
		904	* this is a _very_ stripped down perl interpreter ;)
		905	*/
559	static void	906	static void
560	coro_run (void *arg)	907	coro_run (void *arg)
561	{	908	{
		909	dTHX;
		910
562	/* coro_run is the alternative tail of transfer(), so unlock here. */	911	/* coro_run is the alternative tail of transfer(), so unlock here. */
563	UNLOCK;	912	UNLOCK;
564		913
565	/*	914	/* we now skip the entersub that lead to transfer() */
566	* this is a _very_ stripped down perl interpreter ;)	915	PL_op = PL_op->op_next;
567	*/
568	PL_top_env = &PL_start_env;
569		916
570	/* inject call to cctx_init */	917	/* inject a fake subroutine call to cctx_init */
571	prepare_cctx ((coro_cctx *)arg);	918	prepare_cctx (aTHX_ (coro_cctx *)arg);
572		919
573	/* somebody will hit me for both perl_run and PL_restartop */	920	/* somebody or something will hit me for both perl_run and PL_restartop */
574	PL_restartop = PL_op;	921	PL_restartop = PL_op;
575	perl_run (PL_curinterp);	922	perl_run (PL_curinterp);
576		923
577	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	924	/*
578	abort ();	925	* If perl-run returns we assume exit() was being called or the coro
		926	* fell off the end, which seems to be the only valid (non-bug)
		927	* reason for perl_run to return. We try to exit by jumping to the
		928	* bootstrap-time "top" top_env, as we cannot restore the "main"
		929	* coroutine as Coro has no such concept
		930	*/
		931	PL_top_env = main_top_env;
		932	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
579	}	933	}
580		934
581	static coro_cctx *	935	static coro_cctx *
582	cctx_new ()	936	cctx_new ()
583	{	937	{
584	coro_cctx *cctx;	938	coro_cctx *cctx;
		939	void *stack_start;
		940	size_t stack_size;
585		941
586	++cctx_count;	942	++cctx_count;
587		943
588	New (0, cctx, 1, coro_cctx);	944	Newz (0, cctx, 1, coro_cctx);
589		945
590	#if HAVE_MMAP	946	#if HAVE_MMAP
591		947
592	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	948	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
593	/* mmap supposedly does allocate-on-write for us */	949	/* mmap supposedly does allocate-on-write for us */
594	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	950	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
595		951
596	if (cctx->sptr == (void *)-1)	952	if (cctx->sptr != (void *)-1)
597	{
598	perror ("FATAL: unable to mmap stack for coroutine");
599	_exit (EXIT_FAILURE);
600	}	953	{
601
602	# if STACKGUARD	954	# if CORO_STACKGUARD
603	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	955	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
604	# endif	956	# endif
		957	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		958	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		959	cctx->flags |= CC_MAPPED;
		960	}
		961	else
		962	#endif
		963	{
		964	cctx->ssize = coro_stacksize * (long)sizeof (long);
		965	New (0, cctx->sptr, coro_stacksize, long);
605		966
606	#else
607
608	cctx->ssize = STACKSIZE * (long)sizeof (long);
609	New (0, cctx->sptr, STACKSIZE, long);
610
611	if (!cctx->sptr)	967	if (!cctx->sptr)
612	{	968	{
613	perror ("FATAL: unable to malloc stack for coroutine");	969	perror ("FATAL: unable to allocate stack for coroutine");
614	_exit (EXIT_FAILURE);	970	_exit (EXIT_FAILURE);
615	}	971	}
616		972
617	#endif	973	stack_start = cctx->sptr;
		974	stack_size = cctx->ssize;
		975	}
618		976
619	#if USE_VALGRIND	977	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
620	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
621	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
622	cctx->ssize + (char *)cctx->sptr
623	);
624	#endif
625
626	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	978	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
627		979
628	return cctx;	980	return cctx;
629	}	981	}
630		982
631	static void	983	static void
…		…
634	if (!cctx)	986	if (!cctx)
635	return;	987	return;
636		988
637	--cctx_count;	989	--cctx_count;
638		990
639	#if USE_VALGRIND	991	#if CORO_USE_VALGRIND
640	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	992	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
641	#endif	993	#endif
642		994
643	#if HAVE_MMAP	995	#if HAVE_MMAP
		996	if (cctx->flags & CC_MAPPED)
644	munmap (cctx->sptr, cctx->ssize);	997	munmap (cctx->sptr, cctx->ssize);
645	#else	998	else
		999	#endif
646	Safefree (cctx->sptr);	1000	Safefree (cctx->sptr);
647	#endif
648		1001
649	Safefree (cctx);	1002	Safefree (cctx);
650	}	1003	}
651		1004
		1005	/* wether this cctx should be destructed */
		1006	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1007
652	static coro_cctx *	1008	static coro_cctx *
653	cctx_get ()	1009	cctx_get (pTHX)
654	{	1010	{
655	coro_cctx *cctx;	1011	while (expect_true (cctx_first))
656
657	if (cctx_first)
658	{	1012	{
659	cctx = cctx_first;	1013	coro_cctx *cctx = cctx_first;
660	cctx_first = cctx->next;	1014	cctx_first = cctx->next;
661	--cctx_idle;	1015	--cctx_idle;
662	}	1016
663	else	1017	if (expect_true (!CCTX_EXPIRED (cctx)))
664	{	1018	return cctx;
665	cctx = cctx_new ();	1019
666	PL_op = PL_op->op_next;	1020	cctx_destroy (cctx);
667	}	1021	}
668		1022
669	return cctx;	1023	return cctx_new ();
670	}	1024	}
671		1025
672	static void	1026	static void
673	cctx_put (coro_cctx *cctx)	1027	cctx_put (coro_cctx *cctx)
674	{	1028	{
675	/* free another cctx if overlimit */	1029	/* free another cctx if overlimit */
676	if (cctx_idle >= MAX_IDLE_CCTX)	1030	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
677	{	1031	{
678	coro_cctx *first = cctx_first;	1032	coro_cctx *first = cctx_first;
679	cctx_first = first->next;	1033	cctx_first = first->next;
680	--cctx_idle;	1034	--cctx_idle;
681		1035
682	assert (!first->inuse);
683	cctx_destroy (first);	1036	cctx_destroy (first);
684	}	1037	}
685		1038
686	++cctx_idle;	1039	++cctx_idle;
687	cctx->next = cctx_first;	1040	cctx->next = cctx_first;
688	cctx_first = cctx;	1041	cctx_first = cctx;
689	}	1042	}
690		1043
691	/* never call directly, always through the coro_state_transfer global variable */	1044	/** coroutine switching *****************************************************/
		1045
		1046	static void
		1047	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1048	{
		1049	if (expect_true (prev != next))
		1050	{
		1051	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1052	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1053
		1054	if (expect_false (next->flags & CF_RUNNING))
		1055	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1056
		1057	if (expect_false (next->flags & CF_DESTROYED))
		1058	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1059
		1060	if (
		1061	#if PERL_VERSION_ATLEAST (5,9,0)
		1062	expect_false (PL_parser)
		1063	#else
		1064	expect_false (PL_lex_state != LEX_NOTPARSING)
		1065	#endif
		1066	)
		1067	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1068	}
		1069	}
		1070
		1071	/* always use the TRANSFER macro */
692	static void NOINLINE	1072	static void NOINLINE
693	transfer (struct coro *prev, struct coro *next, int flags)	1073	transfer (pTHX_ struct coro *prev, struct coro *next)
694	{	1074	{
695	dSTACKLEVEL;	1075	dSTACKLEVEL;
696		1076
697	/* sometimes transfer is only called to set idle_sp */	1077	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	1078	if (expect_false (!next))
		1079	{
699	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1080	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1081	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1082	}
700	else if (prev != next)	1083	else if (expect_true (prev != next))
701	{	1084	{
702	coro_cctx *prev__cctx;	1085	coro_cctx *prev__cctx;
703		1086
704	if (prev->flags & CF_NEW)	1087	if (expect_false (prev->flags & CF_NEW))
705	{	1088	{
706	/* create a new empty context */	1089	/* create a new empty context */
707	Newz (0, prev->cctx, 1, coro_cctx);	1090	Newz (0, prev->cctx, 1, coro_cctx);
708	prev->cctx->inuse = 1;
709	prev->flags &= ~CF_NEW;	1091	prev->flags &= ~CF_NEW;
710	prev->flags |= CF_RUNNING;	1092	prev->flags |= CF_RUNNING;
711	}	1093	}
712		1094
713	/*TODO: must not croak here */
714	if (!prev->flags & CF_RUNNING)
715	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
716
717	if (next->flags & CF_RUNNING)
718	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
719
720	prev->flags &= ~CF_RUNNING;	1095	prev->flags &= ~CF_RUNNING;
721	next->flags |= CF_RUNNING;	1096	next->flags |= CF_RUNNING;
722		1097
723	LOCK;	1098	LOCK;
724		1099
725	if (next->flags & CF_NEW)	1100	if (expect_false (next->flags & CF_NEW))
726	{	1101	{
727	/* need to start coroutine */	1102	/* need to start coroutine */
728	next->flags &= ~CF_NEW;	1103	next->flags &= ~CF_NEW;
729	/* first get rid of the old state */	1104	/* first get rid of the old state */
730	SAVE (prev, -1);	1105	save_perl (aTHX_ prev);
731	/* setup coroutine call */	1106	/* setup coroutine call */
732	setup_coro (next);	1107	coro_setup (aTHX_ next);
733	/* need a new stack */
734	assert (!next->stack);
735	}	1108	}
736	else	1109	else
737	{	1110	{
738	/* coroutine already started */	1111	/* coroutine already started */
739	SAVE (prev, flags);	1112	save_perl (aTHX_ prev);
740	LOAD (next);	1113	load_perl (aTHX_ next);
741	}	1114	}
742		1115
743	prev__cctx = prev->cctx;	1116	prev__cctx = prev->cctx;
744		1117
745	/* possibly "free" the cctx */	1118	/* possibly "free" the cctx */
746	if (prev__cctx->idle_sp == STACKLEVEL)	1119	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
747	{	1120	{
748	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1121	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
749	assert (PL_top_env == prev__cctx->top_env);	1122	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
750		1123
751	prev->cctx = 0;	1124	prev->cctx = 0;
752		1125
		1126	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1127	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1128	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1129	next->cctx = cctx_get (aTHX);
		1130
753	cctx_put (prev__cctx);	1131	cctx_put (prev__cctx);
754	prev__cctx->inuse = 0;
755	}	1132	}
756		1133
		1134	++next->usecount;
		1135
757	if (!next->cctx)	1136	if (expect_true (!next->cctx))
758	{
759	next->cctx = cctx_get ();	1137	next->cctx = cctx_get (aTHX);
760	assert (!next->cctx->inuse);
761	next->cctx->inuse = 1;
762	}
763		1138
764	if (prev__cctx != next->cctx)	1139	if (expect_false (prev__cctx != next->cctx))
765	{	1140	{
766	prev__cctx->top_env = PL_top_env;	1141	prev__cctx->top_env = PL_top_env;
767	PL_top_env = next->cctx->top_env;	1142	PL_top_env = next->cctx->top_env;
768	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1143	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
769	}	1144	}
770		1145
771	free_coro_mortal ();	1146	free_coro_mortal (aTHX);
772
773	UNLOCK;	1147	UNLOCK;
		1148
		1149	if (expect_false (prev->throw || next->throw))
		1150	{
		1151	struct coro *coro = SvSTATE (coro_current);
		1152
		1153	if (coro->throw)
		1154	{
		1155	SV *exception = coro->throw;
		1156	coro->throw = 0;
		1157	sv_setsv (ERRSV, exception);
		1158	croak (0);
		1159	}
		1160	}
774	}	1161	}
775	}	1162	}
776		1163
777	struct transfer_args	1164	struct transfer_args
778	{	1165	{
779	struct coro *prev, *next;	1166	struct coro *prev, *next;
780	int flags;
781	};	1167	};
782		1168
783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1169	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1170	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
784		1171
		1172	/** high level stuff ********************************************************/
		1173
785	static void	1174	static int
786	coro_state_destroy (struct coro *coro)	1175	coro_state_destroy (pTHX_ struct coro *coro)
787	{	1176	{
788	if (coro->refcnt--)	1177	if (coro->flags & CF_DESTROYED)
789	return;	1178	return 0;
		1179
		1180	coro->flags |= CF_DESTROYED;
		1181
		1182	if (coro->flags & CF_READY)
		1183	{
		1184	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1185	/* alternative: look through all ready queues and remove the coro */
		1186	LOCK;
		1187	--coro_nready;
		1188	UNLOCK;
		1189	}
		1190	else
		1191	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		1192
791	if (coro->mainstack && coro->mainstack != main_mainstack)	1193	if (coro->mainstack && coro->mainstack != main_mainstack)
792	{	1194	{
793	struct coro temp;	1195	struct coro temp;
794		1196
795	if (coro->flags & CF_RUNNING)	1197	if (coro->flags & CF_RUNNING)
796	croak ("FATAL: tried to destroy currently running coroutine");	1198	croak ("FATAL: tried to destroy currently running coroutine");
797		1199
798	SAVE ((&temp), TRANSFER_SAVE_ALL);	1200	save_perl (aTHX_ &temp);
799	LOAD (coro);	1201	load_perl (aTHX_ coro);
800		1202
801	coro_destroy_stacks ();	1203	coro_destroy (aTHX_ coro);
802		1204
803	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1205	load_perl (aTHX_ &temp);
804		1206
805	coro->mainstack = 0;	1207	coro->slot = 0;
806	}	1208	}
807		1209
808	cctx_destroy (coro->cctx);	1210	cctx_destroy (coro->cctx);
809	SvREFCNT_dec (coro->args);	1211	SvREFCNT_dec (coro->args);
810	Safefree (coro);	1212
		1213	if (coro->next) coro->next->prev = coro->prev;
		1214	if (coro->prev) coro->prev->next = coro->next;
		1215	if (coro == coro_first) coro_first = coro->next;
		1216
		1217	return 1;
811	}	1218	}
812		1219
813	static int	1220	static int
814	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1221	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
815	{	1222	{
816	struct coro *coro = (struct coro *)mg->mg_ptr;	1223	struct coro *coro = (struct coro *)mg->mg_ptr;
817	mg->mg_ptr = 0;	1224	mg->mg_ptr = 0;
818		1225
		1226	coro->hv = 0;
		1227
		1228	if (--coro->refcnt < 0)
		1229	{
819	coro_state_destroy (coro);	1230	coro_state_destroy (aTHX_ coro);
		1231	Safefree (coro);
		1232	}
820		1233
821	return 0;	1234	return 0;
822	}	1235	}
823		1236
824	static int	1237	static int
…		…
831	return 0;	1244	return 0;
832	}	1245	}
833		1246
834	static MGVTBL coro_state_vtbl = {	1247	static MGVTBL coro_state_vtbl = {
835	0, 0, 0, 0,	1248	0, 0, 0, 0,
836	coro_state_clear,	1249	coro_state_free,
837	0,	1250	0,
838	#ifdef MGf_DUP	1251	#ifdef MGf_DUP
839	coro_state_dup,	1252	coro_state_dup,
840	#else	1253	#else
841	# define MGf_DUP 0	1254	# define MGf_DUP 0
842	#endif	1255	#endif
843	};	1256	};
844		1257
845	static struct coro *
846	SvSTATE (SV *coro)
847	{
848	HV *stash;
849	MAGIC *mg;
850
851	if (SvROK (coro))
852	coro = SvRV (coro);
853
854	stash = SvSTASH (coro);
855	if (stash != coro_stash && stash != coro_state_stash)
856	{
857	/* very slow, but rare, check */
858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859	croak ("Coro::State object required");
860	}
861
862	mg = SvMAGIC (coro);
863	assert (mg->mg_type == PERL_MAGIC_ext);
864	return (struct coro *)mg->mg_ptr;
865	}
866
867	static void	1258	static void
868	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1259	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
869	{	1260	{
870	ta->prev = SvSTATE (prev);	1261	ta->prev = SvSTATE (prev_sv);
871	ta->next = SvSTATE (next);	1262	ta->next = SvSTATE (next_sv);
872	ta->flags = flags;	1263	TRANSFER_CHECK (*ta);
873	}	1264	}
874		1265
875	static void	1266	static void
876	api_transfer (SV *prev, SV *next, int flags)	1267	api_transfer (SV *prev_sv, SV *next_sv)
877	{	1268	{
		1269	dTHX;
878	struct transfer_args ta;	1270	struct transfer_args ta;
879		1271
880	prepare_transfer (&ta, prev, next, flags);	1272	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	1273	TRANSFER (ta);
882	}	1274	}
883		1275
884	/** Coro ********************************************************************/	1276	/** Coro ********************************************************************/
885		1277
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static SV *coro_current;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	1278	static void
899	coro_enq (SV *coro_sv)	1279	coro_enq (pTHX_ SV *coro_sv)
900	{	1280	{
901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1281	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
902	coro_nready++;
903	}	1282	}
904		1283
905	static SV *	1284	static SV *
906	coro_deq (int min_prio)	1285	coro_deq (pTHX_ int min_prio)
907	{	1286	{
908	int prio = PRIO_MAX - PRIO_MIN;	1287	int prio = PRIO_MAX - PRIO_MIN;
909		1288
910	min_prio -= PRIO_MIN;	1289	min_prio -= PRIO_MIN;
911	if (min_prio < 0)	1290	if (min_prio < 0)
912	min_prio = 0;	1291	min_prio = 0;
913		1292
914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1293	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
915	if (AvFILLp (coro_ready [prio]) >= 0)	1294	if (AvFILLp (coro_ready [prio]) >= 0)
916	{
917	coro_nready--;
918	return av_shift (coro_ready [prio]);	1295	return av_shift (coro_ready [prio]);
919	}
920		1296
921	return 0;	1297	return 0;
922	}	1298	}
923		1299
924	static int	1300	static int
925	api_ready (SV *coro_sv)	1301	api_ready (SV *coro_sv)
926	{	1302	{
		1303	dTHX;
927	struct coro *coro;	1304	struct coro *coro;
928		1305
929	if (SvROK (coro_sv))	1306	if (SvROK (coro_sv))
930	coro_sv = SvRV (coro_sv);	1307	coro_sv = SvRV (coro_sv);
931		1308
932	coro = SvSTATE (coro_sv);	1309	coro = SvSTATE (coro_sv);
933		1310
934	if (coro->flags & CF_READY)	1311	if (coro->flags & CF_READY)
935	return 0;	1312	return 0;
936		1313
937	#if 0 /* this is actually harmless */
938	if (coro->flags & CF_RUNNING)
939	croak ("Coro::ready called on currently running coroutine");
940	#endif
941
942	coro->flags |= CF_READY;	1314	coro->flags |= CF_READY;
943		1315
944	LOCK;	1316	LOCK;
945	coro_enq (SvREFCNT_inc (coro_sv));	1317	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1318	++coro_nready;
946	UNLOCK;	1319	UNLOCK;
947		1320
948	return 1;	1321	return 1;
949	}	1322	}
950		1323
951	static int	1324	static int
952	api_is_ready (SV *coro_sv)	1325	api_is_ready (SV *coro_sv)
953	{	1326	{
		1327	dTHX;
954	return !!SvSTATE (coro_sv)->flags & CF_READY;	1328	return !!(SvSTATE (coro_sv)->flags & CF_READY);
955	}	1329	}
956		1330
957	static void	1331	static void
958	prepare_schedule (struct transfer_args *ta)	1332	prepare_schedule (pTHX_ struct transfer_args *ta)
959	{	1333	{
960	SV *prev, *next;	1334	SV *prev_sv, *next_sv;
961		1335
962	for (;;)	1336	for (;;)
963	{	1337	{
964	LOCK;	1338	LOCK;
965	next = coro_deq (PRIO_MIN);	1339	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1340
		1341	/* nothing to schedule: call the idle handler */
		1342	if (expect_false (!next_sv))
		1343	{
		1344	dSP;
		1345	UNLOCK;
		1346
		1347	ENTER;
		1348	SAVETMPS;
		1349
		1350	PUSHMARK (SP);
		1351	PUTBACK;
		1352	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1353
		1354	FREETMPS;
		1355	LEAVE;
		1356	continue;
		1357	}
		1358
		1359	ta->next = SvSTATE (next_sv);
		1360
		1361	/* cannot transfer to destroyed coros, skip and look for next */
		1362	if (expect_false (ta->next->flags & CF_DESTROYED))
		1363	{
		1364	UNLOCK;
		1365	SvREFCNT_dec (next_sv);
		1366	/* coro_nready is already taken care of by destroy */
		1367	continue;
		1368	}
		1369
		1370	--coro_nready;
966	UNLOCK;	1371	UNLOCK;
967
968	if (next)
969	break;	1372	break;
970
971	{
972	dSP;
973
974	ENTER;
975	SAVETMPS;
976
977	PUSHMARK (SP);
978	PUTBACK;
979	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
980
981	FREETMPS;
982	LEAVE;
983	}	1373	}
984	}
985
986	prev = SvRV (coro_current);
987	SvRV_set (coro_current, next);
988		1374
989	/* free this only after the transfer */	1375	/* free this only after the transfer */
		1376	prev_sv = SvRV (coro_current);
		1377	ta->prev = SvSTATE (prev_sv);
		1378	TRANSFER_CHECK (*ta);
		1379	assert (ta->next->flags & CF_READY);
		1380	ta->next->flags &= ~CF_READY;
		1381	SvRV_set (coro_current, next_sv);
		1382
990	LOCK;	1383	LOCK;
991	free_coro_mortal ();	1384	free_coro_mortal (aTHX);
		1385	coro_mortal = prev_sv;
992	UNLOCK;	1386	UNLOCK;
993	coro_mortal = prev;
994
995	assert (!SvROK(prev));//D
996	assert (!SvROK(next));//D
997
998	ta->prev = SvSTATE (prev);
999	ta->next = SvSTATE (next);
1000	ta->flags = TRANSFER_SAVE_ALL;
1001
1002	assert (ta->flags & CF_READY);
1003	ta->next->flags &= ~CF_READY;
1004	}	1387	}
1005		1388
1006	static void	1389	static void
1007	prepare_cede (struct transfer_args *ta)	1390	prepare_cede (pTHX_ struct transfer_args *ta)
1008	{	1391	{
1009	api_ready (coro_current);	1392	api_ready (coro_current);
1010
1011	prepare_schedule (ta);	1393	prepare_schedule (aTHX_ ta);
		1394	}
		1395
		1396	static int
		1397	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1398	{
		1399	if (coro_nready)
		1400	{
		1401	SV *prev = SvRV (coro_current);
		1402	prepare_schedule (aTHX_ ta);
		1403	api_ready (prev);
		1404	return 1;
		1405	}
		1406	else
		1407	return 0;
1012	}	1408	}
1013		1409
1014	static void	1410	static void
1015	api_schedule (void)	1411	api_schedule (void)
1016	{	1412	{
		1413	dTHX;
1017	struct transfer_args ta;	1414	struct transfer_args ta;
1018		1415
1019	prepare_schedule (&ta);	1416	prepare_schedule (aTHX_ &ta);
1020	TRANSFER (ta);	1417	TRANSFER (ta);
1021	}	1418	}
1022		1419
1023	static void	1420	static int
1024	api_cede (void)	1421	api_cede (void)
1025	{	1422	{
		1423	dTHX;
1026	struct transfer_args ta;	1424	struct transfer_args ta;
1027		1425
1028	prepare_cede (&ta);	1426	prepare_cede (aTHX_ &ta);
		1427
		1428	if (expect_true (ta.prev != ta.next))
		1429	{
1029	TRANSFER (ta);	1430	TRANSFER (ta);
		1431	return 1;
		1432	}
		1433	else
		1434	return 0;
1030	}	1435	}
1031		1436
		1437	static int
		1438	api_cede_notself (void)
		1439	{
		1440	dTHX;
		1441	struct transfer_args ta;
		1442
		1443	if (prepare_cede_notself (aTHX_ &ta))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
		1450	}
		1451
		1452	static void
		1453	api_trace (SV *coro_sv, int flags)
		1454	{
		1455	dTHX;
		1456	struct coro *coro = SvSTATE (coro_sv);
		1457
		1458	if (flags & CC_TRACE)
		1459	{
		1460	if (!coro->cctx)
		1461	coro->cctx = cctx_new ();
		1462	else if (!(coro->cctx->flags & CC_TRACE))
		1463	croak ("cannot enable tracing on coroutine with custom stack");
		1464
		1465	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1466	}
		1467	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1468	{
		1469	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1470
		1471	if (coro->flags & CF_RUNNING)
		1472	PL_runops = RUNOPS_DEFAULT;
		1473	else
		1474	coro->slot->runops = RUNOPS_DEFAULT;
		1475	}
		1476	}
		1477
1032	MODULE = Coro::State PACKAGE = Coro::State	1478	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1033		1479
1034	PROTOTYPES: DISABLE	1480	PROTOTYPES: DISABLE
1035		1481
1036	BOOT:	1482	BOOT:
1037	{	1483	{
1038	#ifdef USE_ITHREADS	1484	#ifdef USE_ITHREADS
1039	MUTEX_INIT (&coro_mutex);	1485	MUTEX_INIT (&coro_mutex);
1040	#endif	1486	#endif
1041	BOOT_PAGESIZE;	1487	BOOT_PAGESIZE;
1042		1488
		1489	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1490	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1491
		1492	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1493	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1494
		1495	if (!PL_diehook) PL_diehook = SvREFCNT_inc (sv_diehook);
		1496	if (!PL_warnhook) PL_warnhook = SvREFCNT_inc (sv_warnhook);
		1497
1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1498	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1044		1499
1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1500	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1501	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1502	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1503	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1048		1504
1049	main_mainstack = PL_mainstack;	1505	main_mainstack = PL_mainstack;
		1506	main_top_env = PL_top_env;
		1507
		1508	while (main_top_env->je_prev)
		1509	main_top_env = main_top_env->je_prev;
1050		1510
1051	coroapi.ver = CORO_API_VERSION;	1511	coroapi.ver = CORO_API_VERSION;
1052	coroapi.transfer = api_transfer;	1512	coroapi.transfer = api_transfer;
1053		1513
1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1514	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1061	struct coro *coro;	1521	struct coro *coro;
1062	HV *hv;	1522	HV *hv;
1063	int i;	1523	int i;
1064		1524
1065	Newz (0, coro, 1, struct coro);	1525	Newz (0, coro, 1, struct coro);
1066	coro->args = newAV ();	1526	coro->args = newAV ();
1067	coro->flags = CF_NEW;	1527	coro->flags = CF_NEW;
1068		1528
		1529	if (coro_first) coro_first->prev = coro;
		1530	coro->next = coro_first;
		1531	coro_first = coro;
		1532
1069	hv = newHV ();	1533	coro->hv = hv = newHV ();
1070	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1534	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1071	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1535	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1072		1536
		1537	av_extend (coro->args, items - 1);
1073	for (i = 1; i < items; i++)	1538	for (i = 1; i < items; i++)
1074	av_push (coro->args, newSVsv (ST (i)));	1539	av_push (coro->args, newSVsv (ST (i)));
1075	}	1540	}
1076	OUTPUT:	1541	OUTPUT:
1077	RETVAL	1542	RETVAL
1078		1543
		1544	# these not obviously related functions are all rolled into the same xs
		1545	# function to increase chances that they all will call transfer with the same
		1546	# stack offset
1079	void	1547	void
1080	_set_stacklevel (...)	1548	_set_stacklevel (...)
1081	ALIAS:	1549	ALIAS:
1082	Coro::State::transfer = 1	1550	Coro::State::transfer = 1
1083	Coro::schedule = 2	1551	Coro::schedule = 2
1084	Coro::cede = 3	1552	Coro::cede = 3
		1553	Coro::cede_notself = 4
1085	CODE:	1554	CODE:
1086	{	1555	{
1087	struct transfer_args ta;	1556	struct transfer_args ta;
1088		1557
1089	switch (ix)	1558	switch (ix)
1090	{	1559	{
1091	case 0:	1560	case 0:
1092	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1561	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1093	ta.next = 0;	1562	ta.next = 0;
1094	ta.flags = TRANSFER_SET_STACKLEVEL;
1095	break;	1563	break;
1096		1564
1097	case 1:	1565	case 1:
1098	if (items != 3)	1566	if (items != 2)
1099	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1567	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1100		1568
1101	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1569	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1102	break;	1570	break;
1103		1571
1104	case 2:	1572	case 2:
1105	prepare_schedule (&ta);	1573	prepare_schedule (aTHX_ &ta);
1106	break;	1574	break;
1107		1575
1108	case 3:	1576	case 3:
1109	prepare_cede (&ta);	1577	prepare_cede (aTHX_ &ta);
		1578	break;
		1579
		1580	case 4:
		1581	if (!prepare_cede_notself (aTHX_ &ta))
		1582	XSRETURN_EMPTY;
		1583
1110	break;	1584	break;
1111	}	1585	}
1112		1586
		1587	BARRIER;
1113	TRANSFER (ta);	1588	TRANSFER (ta);
1114	}
1115		1589
1116	void	1590	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1117	_clone_state_from (SV *dst, SV *src)	1591	XSRETURN_YES;
		1592	}
		1593
		1594	bool
		1595	_destroy (SV *coro_sv)
1118	CODE:	1596	CODE:
1119	{	1597	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1120	struct coro *coro_src = SvSTATE (src);	1598	OUTPUT:
1121		1599	RETVAL
1122	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1123
1124	++coro_src->refcnt;
1125	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1126	}
1127		1600
1128	void	1601	void
1129	_exit (code)	1602	_exit (code)
1130	int code	1603	int code
1131	PROTOTYPE: $	1604	PROTOTYPE: $
1132	CODE:	1605	CODE:
1133	_exit (code);	1606	_exit (code);
1134		1607
1135	int	1608	int
		1609	cctx_stacksize (int new_stacksize = 0)
		1610	CODE:
		1611	RETVAL = coro_stacksize;
		1612	if (new_stacksize)
		1613	coro_stacksize = new_stacksize;
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	int
1136	cctx_count ()	1618	cctx_count ()
1137	CODE:	1619	CODE:
1138	RETVAL = cctx_count;	1620	RETVAL = cctx_count;
1139	OUTPUT:	1621	OUTPUT:
1140	RETVAL	1622	RETVAL
…		…
1144	CODE:	1626	CODE:
1145	RETVAL = cctx_idle;	1627	RETVAL = cctx_idle;
1146	OUTPUT:	1628	OUTPUT:
1147	RETVAL	1629	RETVAL
1148		1630
		1631	void
		1632	list ()
		1633	PPCODE:
		1634	{
		1635	struct coro *coro;
		1636	for (coro = coro_first; coro; coro = coro->next)
		1637	if (coro->hv)
		1638	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1639	}
		1640
		1641	void
		1642	call (Coro::State coro, SV *coderef)
		1643	ALIAS:
		1644	eval = 1
		1645	CODE:
		1646	{
		1647	if (coro->mainstack)
		1648	{
		1649	struct coro temp;
		1650
		1651	if (!(coro->flags & CF_RUNNING))
		1652	{
		1653	save_perl (aTHX_ &temp);
		1654	load_perl (aTHX_ coro);
		1655	}
		1656
		1657	{
		1658	dSP;
		1659	ENTER;
		1660	SAVETMPS;
		1661	PUSHMARK (SP);
		1662	PUTBACK;
		1663
		1664	if (ix)
		1665	eval_sv (coderef, 0);
		1666	else
		1667	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1668
		1669	SPAGAIN;
		1670	FREETMPS;
		1671	LEAVE;
		1672	PUTBACK;
		1673	}
		1674
		1675	if (!(coro->flags & CF_RUNNING))
		1676	{
		1677	save_perl (aTHX_ coro);
		1678	load_perl (aTHX_ &temp);
		1679	}
		1680	}
		1681	}
		1682
		1683	SV *
		1684	is_ready (Coro::State coro)
		1685	PROTOTYPE: $
		1686	ALIAS:
		1687	is_ready = CF_READY
		1688	is_running = CF_RUNNING
		1689	is_new = CF_NEW
		1690	is_destroyed = CF_DESTROYED
		1691	CODE:
		1692	RETVAL = boolSV (coro->flags & ix);
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	void
		1697	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1698
		1699	SV *
		1700	has_stack (Coro::State coro)
		1701	PROTOTYPE: $
		1702	CODE:
		1703	RETVAL = boolSV (!!coro->cctx);
		1704	OUTPUT:
		1705	RETVAL
		1706
		1707	int
		1708	is_traced (Coro::State coro)
		1709	PROTOTYPE: $
		1710	CODE:
		1711	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1712	OUTPUT:
		1713	RETVAL
		1714
		1715	IV
		1716	rss (Coro::State coro)
		1717	PROTOTYPE: $
		1718	ALIAS:
		1719	usecount = 1
		1720	CODE:
		1721	switch (ix)
		1722	{
		1723	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1724	case 1: RETVAL = coro->usecount; break;
		1725	}
		1726	OUTPUT:
		1727	RETVAL
		1728
		1729
1149	MODULE = Coro::State PACKAGE = Coro	1730	MODULE = Coro::State PACKAGE = Coro
1150		1731
1151	BOOT:	1732	BOOT:
1152	{	1733	{
1153	int i;	1734	int i;
1154		1735
		1736	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1737	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1738	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1739
		1740	coro_current = coro_get_sv ("Coro::current", FALSE);
		1741	SvREADONLY_on (coro_current);
		1742
1155	coro_stash = gv_stashpv ("Coro", TRUE);	1743	coro_stash = gv_stashpv ("Coro", TRUE);
1156		1744
1157	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1745	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1158	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1746	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1159	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1747	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1160	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1748	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1161	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1749	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1162	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1750	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1163		1751
1164	coro_current = get_sv ("Coro::current", FALSE);
1165	SvREADONLY_on (coro_current);
1166
1167	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1752	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1168	coro_ready[i] = newAV ();	1753	coro_ready[i] = newAV ();
1169		1754
1170	{	1755	{
1171	SV *sv = perl_get_sv("Coro::API", 1);	1756	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1757	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1172		1758
1173	coroapi.schedule = api_schedule;	1759	coroapi.schedule = api_schedule;
1174	coroapi.cede = api_cede;	1760	coroapi.cede = api_cede;
		1761	coroapi.cede_notself = api_cede_notself;
1175	coroapi.ready = api_ready;	1762	coroapi.ready = api_ready;
1176	coroapi.is_ready = api_is_ready;	1763	coroapi.is_ready = api_is_ready;
1177	coroapi.nready = &coro_nready;	1764	coroapi.nready = &coro_nready;
1178	coroapi.current = coro_current;	1765	coroapi.current = coro_current;
1179		1766
1180	GCoroAPI = &coroapi;	1767	GCoroAPI = &coroapi;
1181	sv_setiv (sv, (IV)&coroapi);	1768	sv_setiv (sv, (IV)&coroapi);
1182	SvREADONLY_on (sv);	1769	SvREADONLY_on (sv);
1183	}	1770	}
1184	}	1771	}
		1772
		1773	void
		1774	_set_current (SV *current)
		1775	PROTOTYPE: $
		1776	CODE:
		1777	SvREFCNT_dec (SvRV (coro_current));
		1778	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1185		1779
1186	int	1780	int
1187	prio (Coro::State coro, int newprio = 0)	1781	prio (Coro::State coro, int newprio = 0)
1188	ALIAS:	1782	ALIAS:
1189	nice = 1	1783	nice = 1
…		…
1192	RETVAL = coro->prio;	1786	RETVAL = coro->prio;
1193		1787
1194	if (items > 1)	1788	if (items > 1)
1195	{	1789	{
1196	if (ix)	1790	if (ix)
1197	newprio += coro->prio;	1791	newprio = coro->prio - newprio;
1198		1792
1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1793	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1794	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1201		1795
1202	coro->prio = newprio;	1796	coro->prio = newprio;
1203	}	1797	}
1204	}	1798	}
		1799	OUTPUT:
		1800	RETVAL
1205		1801
1206	SV *	1802	SV *
1207	ready (SV *self)	1803	ready (SV *self)
1208	PROTOTYPE: $	1804	PROTOTYPE: $
1209	CODE:	1805	CODE:
1210	RETVAL = boolSV (api_ready (self));	1806	RETVAL = boolSV (api_ready (self));
1211	OUTPUT:	1807	OUTPUT:
1212	RETVAL	1808	RETVAL
1213		1809
1214	SV *
1215	is_ready (SV *self)
1216	PROTOTYPE: $
1217	CODE:
1218	RETVAL = boolSV (api_is_ready (self));
1219	OUTPUT:
1220	RETVAL
1221
1222	int	1810	int
1223	nready (...)	1811	nready (...)
1224	PROTOTYPE:	1812	PROTOTYPE:
1225	CODE:	1813	CODE:
1226	RETVAL = coro_nready;	1814	RETVAL = coro_nready;
1227	OUTPUT:	1815	OUTPUT:
1228	RETVAL	1816	RETVAL
1229		1817
1230	void	1818	void
1231	_set_current (SV *current)	1819	throw (Coro::State self, SV *throw = &PL_sv_undef)
1232	PROTOTYPE: $	1820	PROTOTYPE: $;$
		1821	CODE:
		1822	SvREFCNT_dec (self->throw);
		1823	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1824
		1825	# for async_pool speedup
		1826	void
		1827	_pool_1 (SV *cb)
1233	CODE:	1828	CODE:
1234	SvREFCNT_dec (SvRV (coro_current));	1829	{
1235	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1830	struct coro *coro = SvSTATE (coro_current);
		1831	HV *hv = (HV *)SvRV (coro_current);
		1832	AV *defav = GvAV (PL_defgv);
		1833	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1834	AV *invoke_av;
		1835	int i, len;
		1836
		1837	if (!invoke)
		1838	croak ("\3async_pool terminate\2\n");
		1839
		1840	SvREFCNT_dec (coro->saved_deffh);
		1841	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1842
		1843	hv_store (hv, "desc", sizeof ("desc") - 1,
		1844	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1845
		1846	invoke_av = (AV *)SvRV (invoke);
		1847	len = av_len (invoke_av);
		1848
		1849	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1850
		1851	if (len > 0)
		1852	{
		1853	av_fill (defav, len - 1);
		1854	for (i = 0; i < len; ++i)
		1855	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1856	}
		1857
		1858	SvREFCNT_dec (invoke);
		1859	}
		1860
		1861	void
		1862	_pool_2 (SV *cb)
		1863	CODE:
		1864	{
		1865	struct coro *coro = SvSTATE (coro_current);
		1866
		1867	sv_setsv (cb, &PL_sv_undef);
		1868
		1869	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1870	coro->saved_deffh = 0;
		1871
		1872	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1873	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1874	croak ("\3async_pool terminate\2\n");
		1875
		1876	av_clear (GvAV (PL_defgv));
		1877	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1878	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1879
		1880	coro->prio = 0;
		1881
		1882	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1883	api_trace (coro_current, 0);
		1884
		1885	av_push (av_async_pool, newSVsv (coro_current));
		1886	}
		1887
1236		1888
1237	MODULE = Coro::State PACKAGE = Coro::AIO	1889	MODULE = Coro::State PACKAGE = Coro::AIO
1238		1890
1239	SV *	1891	SV *
1240	_get_state ()	1892	_get_state ()
1241	CODE:	1893	CODE:
1242	{	1894	{
		1895	struct io_state *data;
		1896
1243	RETVAL = newSV (sizeof (struct io_state));	1897	RETVAL = newSV (sizeof (struct io_state));
1244	struct io_state *data = (struct io_state *)SvPVX (RETVAL);	1898	data = (struct io_state *)SvPVX (RETVAL);
1245	SvCUR_set (RETVAL, sizeof (struct io_state));	1899	SvCUR_set (RETVAL, sizeof (struct io_state));
1246	SvPOK_only (RETVAL);	1900	SvPOK_only (RETVAL);
1247		1901
1248	data->errorno = errno;	1902	data->errorno = errno;
1249	data->laststype = PL_laststype;	1903	data->laststype = PL_laststype;

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