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Comparing Coro/Coro/State.xs (file contents):
Revision 1.117 by root, Fri Dec 1 19:41:06 2006 UTC vs.
Revision 1.224 by root, Sun Mar 2 16:10:22 2008 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	15	#include <inttypes.h> /* portable stdint.h */
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		16
54	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
55	# include <unistd.h>	18	# include <unistd.h>
56	# include <sys/mman.h>	19	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
72	#else	35	#else
73	# define PAGESIZE 0	36	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
75	#endif	38	#endif
76		39
77	/* The next macro should declare a variable stacklevel that contains and approximation	40	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	41	# include <valgrind/valgrind.h>
79	* and should be unique. */	42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
		46
		47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
		49
		50	#define PERL_VERSION_ATLEAST(a,b,c) \
		51	(PERL_REVISION > (a) \
		52	|| (PERL_REVISION == (a) \
		53	&& (PERL_VERSION > (b) \
		54	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		55
		56	#if !PERL_VERSION_ATLEAST (5,6,0)
		57	# ifndef PL_ppaddr
		58	# define PL_ppaddr ppaddr
		59	# endif
		60	# ifndef call_sv
		61	# define call_sv perl_call_sv
		62	# endif
		63	# ifndef get_sv
		64	# define get_sv perl_get_sv
		65	# endif
		66	# ifndef get_cv
		67	# define get_cv perl_get_cv
		68	# endif
		69	# ifndef IS_PADGV
		70	# define IS_PADGV(v) 0
		71	# endif
		72	# ifndef IS_PADCONST
		73	# define IS_PADCONST(v) 0
		74	# endif
		75	#endif
		76
		77	/* 5.8.8 */
		78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
		90	/* 5.8.7 */
		91	#ifndef SvRV_set
		92	# define SvRV_set(s,v) SvRV(s) = (v)
		93	#endif
		94
		95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		96	# undef CORO_STACKGUARD
		97	#endif
		98
		99	#ifndef CORO_STACKGUARD
		100	# define CORO_STACKGUARD 0
		101	#endif
		102
		103	/* prefer perl internal functions over our own? */
		104	#ifndef CORO_PREFER_PERL_FUNCTIONS
		105	# define CORO_PREFER_PERL_FUNCTIONS 0
		106	#endif
		107
		108	/* The next macros try to return the current stack pointer, in an as
		109	* portable way as possible. */
80	#define dSTACKLEVEL int stacklevel	110	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	111	#define STACKLEVEL ((void *)&stacklevel)
82		112
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		114
85	#if __GNUC__ >= 3	115	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	116	# define attribute(x) __attribute__(x)
		117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
87	#else	119	#else
88	# define attribute(x)	120	# define attribute(x)
		121	# define BARRIER
		122	# define expect(expr,value) (expr)
89	#endif	123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
90		127
91	#define NOINLINE attribute ((noinline))	128	#define NOINLINE attribute ((noinline))
92		129
93	#include "CoroAPI.h"	130	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		131
97	#ifdef USE_ITHREADS	132	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	133	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	134	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	135	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	136	#else
102	# define LOCK (void)0	137	# define LOCK (void)0
103	# define UNLOCK (void)0	138	# define UNLOCK (void)0
104	#endif	139	#endif
105		140
		141	/* helper storage struct for Coro::AIO */
		142	struct io_state
		143	{
		144	int errorno;
		145	I32 laststype;
		146	int laststatval;
		147	Stat_t statcache;
		148	};
		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
106	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
107	static AV *main_mainstack; /* used to differentiate between $main and others */	152	static AV *main_mainstack; /* used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
108	static HV *coro_state_stash, *coro_stash;	154	static HV *coro_state_stash, *coro_stash;
109	static SV *coro_mortal; /* will be freed after next transfer */	155	static volatile SV *coro_mortal; /* will be freed after next transfer */
		156
		157	static GV *irsgv; /* $/ */
		158	static GV *stdoutgv; /* *STDOUT */
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV *hv_sig; /* %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
110		167
111	static struct coro_cctx *cctx_first;	168	static struct coro_cctx *cctx_first;
112	static int cctx_count, cctx_idle;	169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		178	};
113		179
114	/* this is a structure representing a c-level coroutine */	180	/* this is a structure representing a c-level coroutine */
115	typedef struct coro_cctx {	181	typedef struct coro_cctx {
116	struct coro_cctx *next;	182	struct coro_cctx *next;
117		183
118	/* the stack */	184	/* the stack */
119	void *sptr;	185	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	186	size_t ssize;
121		187
122	/* cpu state */	188	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	189	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		190	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	191	JMPENV *top_env;
125	coro_context cctx;	192	coro_context cctx;
126		193
127	int inuse;
128
129	#if USE_VALGRIND	194	#if CORO_USE_VALGRIND
130	int valgrind_id;	195	int valgrind_id;
131	#endif	196	#endif
		197	unsigned char flags;
132	} coro_cctx;	198	} coro_cctx;
133		199
134	enum {	200	enum {
135	CF_RUNNING = 0x0001, /* coroutine is running */	201	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY = 0x0002, /* coroutine is ready */	202	CF_READY = 0x0002, /* coroutine is ready */
137	CF_NEW = 0x0004, /* ahs never been switched to */	203	CF_NEW = 0x0004, /* has never been switched to */
		204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138	};	205	};
		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		208	typedef struct {
		209	SV *defsv;
		210	AV *defav;
		211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
		217
		218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
139		219
140	/* this is a structure representing a perl-level coroutine */	220	/* this is a structure representing a perl-level coroutine */
141	struct coro {	221	struct coro {
142	/* the c coroutine allocated to this perl coroutine, if any */	222	/* the c coroutine allocated to this perl coroutine, if any */
143	coro_cctx *cctx;	223	coro_cctx *cctx;
144		224
		225	/* process data */
		226	AV *mainstack;
		227	perl_slots *slot; /* basically the saved sp */
		228
145	/* data associated with this coroutine (initial args) */	229	AV *args; /* data associated with this coroutine (initial args) */
146	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
147	int refcnt;	231	int flags; /* CF_ flags */
148	int flags;	232	HV *hv; /* the perl hash associated with this coro, if any */
149		233
150	/* optionally saved, might be zero */	234	/* statistics */
151	AV *defav;	235	int usecount; /* number of transfers to this coro */
152	SV *defsv;
153	SV *errsv;
154
155	#define VAR(name,type) type name;
156	# include "state.h"
157	#undef VAR
158		236
159	/* coro process data */	237	/* coro process data */
160	int prio;	238	int prio;
		239	SV *throw; /* exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
		243
		244	/* linked list */
		245	struct coro *next, *prev;
161	};	246	};
162		247
163	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
165		250
		251	/** Coro ********************************************************************/
		252
		253	#define PRIO_MAX 3
		254	#define PRIO_HIGH 1
		255	#define PRIO_NORMAL 0
		256	#define PRIO_LOW -1
		257	#define PRIO_IDLE -3
		258	#define PRIO_MIN -4
		259
		260	/* for Coro.pm */
		261	static SV *coro_current;
		262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		263	static int coro_nready;
		264	static struct coro *coro_first;
		265
		266	/** lowlevel stuff **********************************************************/
		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,9,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
166	static AV *	278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,9,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,9,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
		298	static AV *
167	coro_clone_padlist (CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
168	{	300	{
169	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	302	AV *newpadlist, *newpad;
171		303
172	newpadlist = newAV ();	304	newpadlist = newAV ();
…		…
184		316
185	return newpadlist;	317	return newpadlist;
186	}	318	}
187		319
188	static void	320	static void
189	free_padlist (AV *padlist)	321	free_padlist (pTHX_ AV *padlist)
190	{	322	{
191	/* may be during global destruction */	323	/* may be during global destruction */
192	if (SvREFCNT (padlist))	324	if (SvREFCNT (padlist))
193	{	325	{
194	I32 i = AvFILLp (padlist);	326	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	347	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	348	AV *av = (AV *)mg->mg_obj;
217		349
218	/* casting is fun. */	350	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	352	free_padlist (aTHX_ padlist);
221
222	SvREFCNT_dec (av);
223		353
224	return 0;	354	return 0;
225	}	355	}
226		356
227	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
228		359
229	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
230		364
231	#define CORO_MAGIC(cv) \	365	#define CORO_MAGIC(sv,type) \
232	SvMAGIC (cv) \	366	SvMAGIC (sv) \
233	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	367	? SvMAGIC (sv)->mg_type == type \
234	? SvMAGIC (cv) \	368	? SvMAGIC (sv) \
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	369	: mg_find (sv, type) \
236	: 0	370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
237		400
238	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
239	static void	402	static void
240	get_padlist (CV *cv)	403	get_padlist (pTHX_ CV *cv)
241	{	404	{
242	MAGIC *mg = CORO_MAGIC (cv);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
243	AV *av;	406	AV *av;
244		407
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	410	else
248	{	411	{
249	#if 0	412	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	413	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	414	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	415	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	416	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	417	SvREFCNT_dec (cp);
255	#else	418	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	420	#endif
258	}	421	}
259	}	422	}
260		423
261	static void	424	static void
262	put_padlist (CV *cv)	425	put_padlist (pTHX_ CV *cv)
263	{	426	{
264	MAGIC *mg = CORO_MAGIC (cv);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
265	AV *av;	428	AV *av;
266		429
267	if (!mg)	430	if (expect_false (!mg))
268	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
269	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271	mg->mg_virtual = &vtbl_coro;
272	mg->mg_obj = (SV *)newAV ();
273	}
274		432
275	av = (AV *)mg->mg_obj;	433	av = (AV *)mg->mg_obj;
276		434
277	if (AvFILLp (av) >= AvMAX (av))	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
278	av_extend (av, AvMAX (av) + 1);	436	av_extend (av, AvMAX (av) + 1);
279		437
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	439	}
282		440
283	#define SB do {	441	/** load & save, init *******************************************************/
284	#define SE } while (0)
285
286	#define LOAD(state) load_state ((state))
287	#define SAVE(state,flags) save_state ((state),(flags))
288
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290		442
291	static void	443	static void
292	load_state (Coro__State c)	444	load_perl (pTHX_ Coro__State c)
293	{	445	{
		446	perl_slots *slot = c->slot;
		447	c->slot = 0;
		448
		449	PL_mainstack = c->mainstack;
		450
		451	GvSV (PL_defgv) = slot->defsv;
		452	GvAV (PL_defgv) = slot->defav;
		453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
294	#define VAR(name,type) PL_ ## name = c->name;	456	#define VAR(name,type) PL_ ## name = slot->name;
295	# include "state.h"	457	# include "state.h"
296	#undef VAR	458	#undef VAR
297
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
301		459
302	{	460	{
303	dSP;	461	dSP;
		462
304	CV *cv;	463	CV *cv;
305		464
306	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
308	{	467	{
309	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	469	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	470	CvPADLIST (cv) = (AV *)POPs;
312	}	471	}
313		472
314	PUTBACK;	473	PUTBACK;
315	}	474	}
316	}	475	}
317		476
318	static void	477	static void
319	save_state (Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
320	{	479	{
321	{	480	{
322	dSP;	481	dSP;
323	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
327	/*	486	/*
328	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
329	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
330	*/	489	*/
331		490
332	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
334	for (;;)	493	for (;;)
335	{	494	{
336	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
337	{	496	{
338	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
339		498
340	if (CxTYPE (cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
341	{	500	{
342	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
343		502
344	if (CvDEPTH (cv))	503	if (expect_true (CvDEPTH (cv)))
345	{	504	{
346	EXTEND (SP, 3);	505	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	506	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
351		509
352	CvDEPTH (cv) = 0;	510	CvDEPTH (cv) = 0;
353	get_padlist (cv);	511	get_padlist (aTHX_ cv);
354	}	512	}
355	}	513	}
356	#ifdef CXt_FORMAT
357	else if (CxTYPE (cx) == CXt_FORMAT)
358	{
359	/* I never used formats, so how should I know how these are implemented? */
360	/* my bold guess is as a simple, plain sub... */
361	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362	}
363	#endif
364	}	514	}
365		515
366	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
367	break;	517	break;
368		518
369	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
370	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
371	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
372	}	522	}
373		523
374	PUTBACK;	524	PUTBACK;
375	}	525	}
376		526
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
380		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		543
		544	slot->defav = GvAV (PL_defgv);
		545	slot->defsv = DEFSV;
		546	slot->errsv = ERRSV;
		547	slot->irsgv = GvSV (irsgv);
		548
381	#define VAR(name,type)c->name = PL_ ## name;	549	#define VAR(name,type) slot->name = PL_ ## name;
382	# include "state.h"	550	# include "state.h"
383	#undef VAR	551	#undef VAR
		552	}
384	}	553	}
385		554
386	/*	555	/*
387	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
391	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
392	static void	564	static void
393	coro_init_stacks ()	565	coro_init_stacks (pTHX)
394	{	566	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	567	PL_curstackinfo = new_stackinfo(32, 8);
396	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399		571
400	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
401	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403		575
404	New(50,PL_tmps_stack,128,SV*);	576	New(50,PL_tmps_stack,32,SV*);
405	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
406	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
407	PL_tmps_max = 128;	579	PL_tmps_max = 32;
408		580
409	New(54,PL_markstack,32,I32);	581	New(54,PL_markstack,16,I32);
410	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
411	PL_markstack_max = PL_markstack + 32;	583	PL_markstack_max = PL_markstack + 16;
412		584
413	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
414	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
415	#endif	587	#endif
416		588
417	New(54,PL_scopestack,32,I32);	589	New(54,PL_scopestack,8,I32);
418	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
419	PL_scopestack_max = 32;	591	PL_scopestack_max = 8;
420		592
421	New(54,PL_savestack,64,ANY);	593	New(54,PL_savestack,24,ANY);
422	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
423	PL_savestack_max = 64;	595	PL_savestack_max = 24;
424		596
425	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,9,0)
426	New(54,PL_retstack,16,OP*);	598	New(54,PL_retstack,4,OP*);
427	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	600	PL_retstack_max = 4;
429	#endif	601	#endif
430	}	602	}
		603	#endif
431		604
432	/*	605	/*
433	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
434	*/	607	*/
435	static void	608	static void
436	coro_destroy_stacks ()	609	coro_destroy_stacks (pTHX)
437	{	610	{
438	if (!IN_DESTRUCT)
439	{
440	/* is this ugly, I ask? */
441	LEAVE_SCOPE (0);
442
443	/* sure it is, but more important: is it correct?? :/ */
444	FREETMPS;
445
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447	}
448
449	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
451		613
452	while (PL_curstackinfo)	614	while (PL_curstackinfo)
453	{	615	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
455		617
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		620
468	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	623	PL_curstackinfo = p;
471	}	624	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	630	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	631	Safefree (PL_retstack);
479	#endif	632	#endif
480	}	633	}
481		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
		674	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		675	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV *old = *svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
		723
482	static void	724	static void
483	setup_coro (struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
484	{	726	{
485	/*	727	/*
486	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
487	*/	729	*/
488
489	coro_init_stacks ();	730	coro_init_stacks (aTHX);
490		731
		732	PL_runops = RUNOPS_DEFAULT;
491	PL_curcop = &PL_compiling;	733	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	734	PL_in_eval = EVAL_NULL;
		735	PL_comppad = 0;
493	PL_curpm = 0;	736	PL_curpm = 0;
		737	PL_curpad = 0;
494	PL_localizing = 0;	738	PL_localizing = 0;
495	PL_dirty = 0;	739	PL_dirty = 0;
496	PL_restartop = 0;	740	PL_restartop = 0;
497		741
		742	/* recreate the die/warn hooks */
		743	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		744	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		745
		746	GvSV (PL_defgv) = newSV (0);
		747	GvAV (PL_defgv) = coro->args; coro->args = 0;
		748	GvSV (PL_errgv) = newSV (0);
		749	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		750	PL_rs = newSVsv (GvSV (irsgv));
		751	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		752
498	{	753	{
499	dSP;	754	dSP;
500	LOGOP myop;	755	LOGOP myop;
501		756
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508	Zero (&myop, 1, LOGOP);	757	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	758	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	759	myop.op_flags = OPf_WANT_VOID;
511		760
		761	PUSHMARK (SP);
		762	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		763	PUTBACK;
512	PL_op = (OP *)&myop;	764	PL_op = (OP *)&myop;
513
514	PUSHMARK (SP);
515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516	PUTBACK;
517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	765	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	766	SPAGAIN;
519	}	767	}
520		768
521	ENTER; /* necessary e.g. for dounwind */	769	/* this newly created coroutine might be run on an existing cctx which most
		770	* likely was suspended in set_stacklevel, called from entersub.
		771	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		772	* so we ENTER here for symmetry
		773	*/
		774	ENTER;
522	}	775	}
523		776
524	static void	777	static void
		778	coro_destroy (pTHX_ struct coro *coro)
		779	{
		780	if (!IN_DESTRUCT)
		781	{
		782	/* restore all saved variables and stuff */
		783	LEAVE_SCOPE (0);
		784	assert (PL_tmps_floor == -1);
		785
		786	/* free all temporaries */
		787	FREETMPS;
		788	assert (PL_tmps_ix == -1);
		789
		790	/* unwind all extra stacks */
		791	POPSTACK_TO (PL_mainstack);
		792
		793	/* unwind main stack */
		794	dounwind (-1);
		795	}
		796
		797	SvREFCNT_dec (GvSV (PL_defgv));
		798	SvREFCNT_dec (GvAV (PL_defgv));
		799	SvREFCNT_dec (GvSV (PL_errgv));
		800	SvREFCNT_dec (PL_defoutgv);
		801	SvREFCNT_dec (PL_rs);
		802	SvREFCNT_dec (GvSV (irsgv));
		803
		804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
		809
		810	coro_destroy_stacks (aTHX);
		811	}
		812
		813	static void
525	free_coro_mortal ()	814	free_coro_mortal (pTHX)
526	{	815	{
527	if (coro_mortal)	816	if (expect_true (coro_mortal))
528	{	817	{
529	SvREFCNT_dec (coro_mortal);	818	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	819	coro_mortal = 0;
531	}	820	}
532	}	821	}
533		822
		823	static int
		824	runops_trace (pTHX)
		825	{
		826	COP *oldcop = 0;
		827	int oldcxix = -2;
		828	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		829	coro_cctx *cctx = coro->cctx;
		830
		831	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		832	{
		833	PERL_ASYNC_CHECK ();
		834
		835	if (cctx->flags & CC_TRACE_ALL)
		836	{
		837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		838	{
		839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		840	SV **bot, **top;
		841	AV *av = newAV (); /* return values */
		842	SV **cb;
		843	dSP;
		844
		845	GV *gv = CvGV (cx->blk_sub.cv);
		846	SV *fullname = sv_2mortal (newSV (0));
		847	if (isGV (gv))
		848	gv_efullname3 (fullname, gv, 0);
		849
		850	bot = PL_stack_base + cx->blk_oldsp + 1;
		851	top = cx->blk_gimme == G_ARRAY ? SP + 1
		852	: cx->blk_gimme == G_SCALAR ? bot + 1
		853	: bot;
		854
		855	av_extend (av, top - bot);
		856	while (bot < top)
		857	av_push (av, SvREFCNT_inc (*bot++));
		858
		859	PL_runops = RUNOPS_DEFAULT;
		860	ENTER;
		861	SAVETMPS;
		862	EXTEND (SP, 3);
		863	PUSHMARK (SP);
		864	PUSHs (&PL_sv_no);
		865	PUSHs (fullname);
		866	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		867	PUTBACK;
		868	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		869	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		870	SPAGAIN;
		871	FREETMPS;
		872	LEAVE;
		873	PL_runops = runops_trace;
		874	}
		875
		876	if (oldcop != PL_curcop)
		877	{
		878	oldcop = PL_curcop;
		879
		880	if (PL_curcop != &PL_compiling)
		881	{
		882	SV **cb;
		883
		884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		885	{
		886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		887
		888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		889	{
		890	runops_proc_t old_runops = PL_runops;
		891	dSP;
		892	GV *gv = CvGV (cx->blk_sub.cv);
		893	SV *fullname = sv_2mortal (newSV (0));
		894
		895	if (isGV (gv))
		896	gv_efullname3 (fullname, gv, 0);
		897
		898	PL_runops = RUNOPS_DEFAULT;
		899	ENTER;
		900	SAVETMPS;
		901	EXTEND (SP, 3);
		902	PUSHMARK (SP);
		903	PUSHs (&PL_sv_yes);
		904	PUSHs (fullname);
		905	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		906	PUTBACK;
		907	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		908	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		909	SPAGAIN;
		910	FREETMPS;
		911	LEAVE;
		912	PL_runops = runops_trace;
		913	}
		914
		915	oldcxix = cxstack_ix;
		916	}
		917
		918	if (cctx->flags & CC_TRACE_LINE)
		919	{
		920	dSP;
		921
		922	PL_runops = RUNOPS_DEFAULT;
		923	ENTER;
		924	SAVETMPS;
		925	EXTEND (SP, 3);
		926	PL_runops = RUNOPS_DEFAULT;
		927	PUSHMARK (SP);
		928	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		929	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		930	PUTBACK;
		931	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		932	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		933	SPAGAIN;
		934	FREETMPS;
		935	LEAVE;
		936	PL_runops = runops_trace;
		937	}
		938	}
		939	}
		940	}
		941	}
		942
		943	TAINT_NOT;
		944	return 0;
		945	}
		946
		947	/* inject a fake call to Coro::State::_cctx_init into the execution */
		948	/* _cctx_init should be careful, as it could be called at almost any time */
		949	/* during execution of a perl program */
534	static void NOINLINE	950	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	951	cctx_prepare (pTHX_ coro_cctx *cctx)
536	{	952	{
537	dSP;	953	dSP;
538	LOGOP myop;	954	LOGOP myop;
539		955
		956	PL_top_env = &PL_start_env;
		957
		958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
		960
540	Zero (&myop, 1, LOGOP);	961	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	962	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	963	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		964
546	PUSHMARK (SP);	965	PUSHMARK (SP);
		966	EXTEND (SP, 2);
		967	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	968	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	969	PUTBACK;
		970	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	971	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	972	SPAGAIN;
551	}	973	}
552		974
		975	/*
		976	* this is a _very_ stripped down perl interpreter ;)
		977	*/
553	static void	978	static void
554	coro_run (void *arg)	979	cctx_run (void *arg)
555	{	980	{
		981	dTHX;
		982
556	/* coro_run is the alternative epilogue of transfer() */	983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	984	UNLOCK;
558		985
		986	/* we now skip the entersub that lead to transfer() */
		987	PL_op = PL_op->op_next;
		988
		989	/* inject a fake subroutine call to cctx_init */
		990	cctx_prepare (aTHX_ (coro_cctx *)arg);
		991
		992	/* somebody or something will hit me for both perl_run and PL_restartop */
		993	PL_restartop = PL_op;
		994	perl_run (PL_curinterp);
		995
559	/*	996	/*
560	* this is a _very_ stripped down perl interpreter ;)	997	* If perl-run returns we assume exit() was being called or the coro
		998	* fell off the end, which seems to be the only valid (non-bug)
		999	* reason for perl_run to return. We try to exit by jumping to the
		1000	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1001	* coroutine as Coro has no such concept
561	*/	1002	*/
562	PL_top_env = &PL_start_env;	1003	PL_top_env = main_top_env;
563		1004	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
564	/* inject call to cctx_init */
565	prepare_cctx ((coro_cctx *)arg);
566
567	/* somebody will hit me for both perl_run and PL_restartop */
568	perl_run (PL_curinterp);
569
570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571	abort ();
572	}	1005	}
573		1006
574	static coro_cctx *	1007	static coro_cctx *
575	cctx_new ()	1008	cctx_new ()
576	{	1009	{
577	coro_cctx *cctx;	1010	coro_cctx *cctx;
		1011	void *stack_start;
		1012	size_t stack_size;
578		1013
579	++cctx_count;	1014	++cctx_count;
580		1015
581	New (0, cctx, 1, coro_cctx);	1016	Newz (0, cctx, 1, coro_cctx);
582		1017
583	#if HAVE_MMAP	1018	#if HAVE_MMAP
584
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1019	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	1020	/* mmap supposedly does allocate-on-write for us */
587	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1021	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		1022
589	if (cctx->sptr == (void *)-1)	1023	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	1024	{
594
595	# if STACKGUARD	1025	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1026	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	1027	# endif
		1028	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1029	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1030	cctx->flags |= CC_MAPPED;
		1031	}
		1032	else
		1033	#endif
		1034	{
		1035	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1036	New (0, cctx->sptr, coro_stacksize, long);
598		1037
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	1038	if (!cctx->sptr)
605	{	1039	{
606	perror ("FATAL: unable to malloc stack for coroutine");	1040	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	1041	_exit (EXIT_FAILURE);
608	}	1042	}
609		1043
610	#endif	1044	stack_start = cctx->sptr;
		1045	stack_size = cctx->ssize;
		1046	}
611		1047
612	#if USE_VALGRIND	1048	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
613	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1049	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
614	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615	cctx->ssize + (char *)cctx->sptr
616	);
617	#endif
618
619	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
620		1050
621	return cctx;	1051	return cctx;
622	}	1052	}
623		1053
624	static void	1054	static void
…		…
627	if (!cctx)	1057	if (!cctx)
628	return;	1058	return;
629		1059
630	--cctx_count;	1060	--cctx_count;
631		1061
632	#if USE_VALGRIND	1062	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	1064	#endif
635		1065
636	#if HAVE_MMAP	1066	#if HAVE_MMAP
		1067	if (cctx->flags & CC_MAPPED)
637	munmap (cctx->sptr, cctx->ssize);	1068	munmap (cctx->sptr, cctx->ssize);
638	#else	1069	else
		1070	#endif
639	Safefree (cctx->sptr);	1071	Safefree (cctx->sptr);
640	#endif
641		1072
642	Safefree (cctx);	1073	Safefree (cctx);
643	}	1074	}
644		1075
		1076	/* wether this cctx should be destructed */
		1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1078
645	static coro_cctx *	1079	static coro_cctx *
646	cctx_get ()	1080	cctx_get (pTHX)
647	{	1081	{
648	coro_cctx *cctx;	1082	while (expect_true (cctx_first))
649
650	if (cctx_first)
651	{	1083	{
652	cctx = cctx_first;	1084	coro_cctx *cctx = cctx_first;
653	cctx_first = cctx->next;	1085	cctx_first = cctx->next;
654	--cctx_idle;	1086	--cctx_idle;
655	}	1087
656	else	1088	if (expect_true (!CCTX_EXPIRED (cctx)))
657	{	1089	return cctx;
658	cctx = cctx_new ();	1090
659	PL_op = PL_op->op_next;	1091	cctx_destroy (cctx);
660	}	1092	}
661		1093
662	return cctx;	1094	return cctx_new ();
663	}	1095	}
664		1096
665	static void	1097	static void
666	cctx_put (coro_cctx *cctx)	1098	cctx_put (coro_cctx *cctx)
667	{	1099	{
668	/* free another cctx if overlimit */	1100	/* free another cctx if overlimit */
669	if (cctx_idle >= MAX_IDLE_CCTX)	1101	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
670	{	1102	{
671	coro_cctx *first = cctx_first;	1103	coro_cctx *first = cctx_first;
672	cctx_first = first->next;	1104	cctx_first = first->next;
673	--cctx_idle;	1105	--cctx_idle;
674		1106
675	assert (!first->inuse);
676	cctx_destroy (first);	1107	cctx_destroy (first);
677	}	1108	}
678		1109
679	++cctx_idle;	1110	++cctx_idle;
680	cctx->next = cctx_first;	1111	cctx->next = cctx_first;
681	cctx_first = cctx;	1112	cctx_first = cctx;
682	}	1113	}
683		1114
684	/* never call directly, always through the coro_state_transfer global variable */	1115	/** coroutine switching *****************************************************/
		1116
		1117	static void
		1118	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1119	{
		1120	if (expect_true (prev != next))
		1121	{
		1122	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1123	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1124
		1125	if (expect_false (next->flags & CF_RUNNING))
		1126	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1127
		1128	if (expect_false (next->flags & CF_DESTROYED))
		1129	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (
		1132	#if PERL_VERSION_ATLEAST (5,9,0)
		1133	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
		1134	#else
		1135	expect_false (PL_lex_state != LEX_NOTPARSING)
		1136	#endif
		1137	)
		1138	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1139	}
		1140	}
		1141
		1142	/* always use the TRANSFER macro */
685	static void NOINLINE	1143	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	1144	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	1145	{
688	dSTACKLEVEL;	1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
689		1148
690	/* sometimes transfer is only called to set idle_sp */	1149	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	1150	if (expect_false (!next))
		1151	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1153	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1154	}
693	else if (prev != next)	1155	else if (expect_true (prev != next))
694	{	1156	{
695	coro_cctx *prev__cctx;	1157	coro_cctx *prev__cctx;
696		1158
697	if (prev->flags & CF_NEW)	1159	if (expect_false (prev->flags & CF_NEW))
698	{	1160	{
699	/* create a new empty context */	1161	/* create a new empty context */
700	Newz (0, prev->cctx, 1, coro_cctx);	1162	Newz (0, prev->cctx, 1, coro_cctx);
701	prev->cctx->inuse = 1;
702	prev->flags &= ~CF_NEW;	1163	prev->flags &= ~CF_NEW;
703	prev->flags |= CF_RUNNING;	1164	prev->flags |= CF_RUNNING;
704	}	1165	}
705		1166
706	/*TODO: must not croak here */
707	if (!prev->flags & CF_RUNNING)
708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710	if (next->flags & CF_RUNNING)
711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713	prev->flags &= ~CF_RUNNING;	1167	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	1168	next->flags |= CF_RUNNING;
715		1169
716	LOCK;	1170	LOCK;
717		1171
718	if (next->mainstack)	1172	/* first get rid of the old state */
		1173	save_perl (aTHX_ prev);
		1174
		1175	if (expect_false (next->flags & CF_NEW))
719	{	1176	{
720	/* coroutine already started */	1177	/* need to start coroutine */
721	SAVE (prev, flags);	1178	next->flags &= ~CF_NEW;
722	LOAD (next);	1179	/* setup coroutine call */
		1180	coro_setup (aTHX_ next);
723	}	1181	}
724	else	1182	else
725	{	1183	load_perl (aTHX_ next);
726	/* need to start coroutine */
727	assert (next->flags & CF_NEW);
728	next->flags &= ~CF_NEW;
729	/* first get rid of the old state */
730	SAVE (prev, -1);
731	/* setup coroutine call */
732	setup_coro (next);
733	/* need a new stack */
734	assert (!next->stack);
735	}
736		1184
737	prev__cctx = prev->cctx;	1185	prev__cctx = prev->cctx;
738		1186
739	/* possibly "free" the cctx */	1187	/* possibly "free" the cctx */
740	if (prev__cctx->idle_sp == STACKLEVEL && 0)	1188	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
741	{	1189	{
742	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1190	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
743	assert (PL_top_env == prev__cctx->top_env);	1191	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
744		1192
745	prev->cctx = 0;	1193	prev->cctx = 0;
746		1194
		1195	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1196	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1197	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1198	if (!next->cctx)
		1199	next->cctx = cctx_get (aTHX);
		1200
747	cctx_put (prev__cctx);	1201	cctx_put (prev__cctx);
748	prev__cctx->inuse = 0;
749	}	1202	}
750		1203
		1204	++next->usecount;
		1205
751	if (!next->cctx)	1206	if (expect_true (!next->cctx))
752	{
753	next->cctx = cctx_get ();	1207	next->cctx = cctx_get (aTHX);
754	assert (!next->cctx->inuse);
755	next->cctx->inuse = 1;
756	}
757		1208
		1209	has_throw = !!next->throw;
		1210
758	if (prev__cctx != next->cctx)	1211	if (expect_false (prev__cctx != next->cctx))
759	{	1212	{
760	prev__cctx->top_env = PL_top_env;	1213	prev__cctx->top_env = PL_top_env;
761	PL_top_env = next->cctx->top_env;	1214	PL_top_env = next->cctx->top_env;
762	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1215	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
763	}	1216	}
764		1217
765	free_coro_mortal ();	1218	free_coro_mortal (aTHX);
766
767	UNLOCK;	1219	UNLOCK;
		1220
		1221	if (expect_false (has_throw))
		1222	{
		1223	struct coro *coro = SvSTATE (coro_current);
		1224
		1225	if (coro->throw)
		1226	{
		1227	SV *exception = coro->throw;
		1228	coro->throw = 0;
		1229	sv_setsv (ERRSV, exception);
		1230	croak (0);
		1231	}
		1232	}
768	}	1233	}
769	}	1234	}
770		1235
771	struct transfer_args	1236	struct transfer_args
772	{	1237	{
773	struct coro *prev, *next;	1238	struct coro *prev, *next;
774	int flags;
775	};	1239	};
776		1240
777	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1241	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1242	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
778		1243
		1244	/** high level stuff ********************************************************/
		1245
779	static void	1246	static int
780	coro_state_destroy (struct coro *coro)	1247	coro_state_destroy (pTHX_ struct coro *coro)
781	{	1248	{
782	if (coro->refcnt--)	1249	if (coro->flags & CF_DESTROYED)
783	return;	1250	return 0;
		1251
		1252	coro->flags |= CF_DESTROYED;
		1253
		1254	if (coro->flags & CF_READY)
		1255	{
		1256	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1257	/* alternative: look through all ready queues and remove the coro */
		1258	LOCK;
		1259	--coro_nready;
		1260	UNLOCK;
		1261	}
		1262	else
		1263	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
784		1264
785	if (coro->mainstack && coro->mainstack != main_mainstack)	1265	if (coro->mainstack && coro->mainstack != main_mainstack)
786	{	1266	{
787	struct coro temp;	1267	struct coro temp;
788		1268
789	if (coro->flags & CF_RUNNING)	1269	if (coro->flags & CF_RUNNING)
790	croak ("FATAL: tried to destroy currently running coroutine");	1270	croak ("FATAL: tried to destroy currently running coroutine");
791		1271
792	SAVE ((&temp), TRANSFER_SAVE_ALL);	1272	save_perl (aTHX_ &temp);
793	LOAD (coro);	1273	load_perl (aTHX_ coro);
794		1274
795	coro_destroy_stacks ();	1275	coro_destroy (aTHX_ coro);
796		1276
797	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1277	load_perl (aTHX_ &temp);
798		1278
799	coro->mainstack = 0;	1279	coro->slot = 0;
800	}	1280	}
801		1281
802	cctx_destroy (coro->cctx);	1282	cctx_destroy (coro->cctx);
803	SvREFCNT_dec (coro->args);	1283	SvREFCNT_dec (coro->args);
804	Safefree (coro);	1284
		1285	if (coro->next) coro->next->prev = coro->prev;
		1286	if (coro->prev) coro->prev->next = coro->next;
		1287	if (coro == coro_first) coro_first = coro->next;
		1288
		1289	return 1;
805	}	1290	}
806		1291
807	static int	1292	static int
808	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1293	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809	{	1294	{
810	struct coro *coro = (struct coro *)mg->mg_ptr;	1295	struct coro *coro = (struct coro *)mg->mg_ptr;
811	mg->mg_ptr = 0;	1296	mg->mg_ptr = 0;
812		1297
		1298	coro->hv = 0;
		1299
		1300	if (--coro->refcnt < 0)
		1301	{
813	coro_state_destroy (coro);	1302	coro_state_destroy (aTHX_ coro);
		1303	Safefree (coro);
		1304	}
814		1305
815	return 0;	1306	return 0;
816	}	1307	}
817		1308
818	static int	1309	static int
…		…
825	return 0;	1316	return 0;
826	}	1317	}
827		1318
828	static MGVTBL coro_state_vtbl = {	1319	static MGVTBL coro_state_vtbl = {
829	0, 0, 0, 0,	1320	0, 0, 0, 0,
830	coro_state_clear,	1321	coro_state_free,
831	0,	1322	0,
832	#ifdef MGf_DUP	1323	#ifdef MGf_DUP
833	coro_state_dup,	1324	coro_state_dup,
834	#else	1325	#else
835	# define MGf_DUP 0	1326	# define MGf_DUP 0
836	#endif	1327	#endif
837	};	1328	};
838		1329
839	static struct coro *
840	SvSTATE (SV *coro)
841	{
842	HV *stash;
843	MAGIC *mg;
844
845	if (SvROK (coro))
846	coro = SvRV (coro);
847
848	stash = SvSTASH (coro);
849	if (stash != coro_stash && stash != coro_state_stash)
850	{
851	/* very slow, but rare, check */
852	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
853	croak ("Coro::State object required");
854	}
855
856	mg = SvMAGIC (coro);
857	assert (mg->mg_type == PERL_MAGIC_ext);
858	return (struct coro *)mg->mg_ptr;
859	}
860
861	static void	1330	static void
862	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1331	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
863	{	1332	{
864	ta->prev = SvSTATE (prev);	1333	ta->prev = SvSTATE (prev_sv);
865	ta->next = SvSTATE (next);	1334	ta->next = SvSTATE (next_sv);
866	ta->flags = flags;	1335	TRANSFER_CHECK (*ta);
867	}	1336	}
868		1337
869	static void	1338	static void
870	api_transfer (SV *prev, SV *next, int flags)	1339	api_transfer (SV *prev_sv, SV *next_sv)
871	{	1340	{
		1341	dTHX;
872	struct transfer_args ta;	1342	struct transfer_args ta;
873		1343
874	prepare_transfer (&ta, prev, next, flags);	1344	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
875	TRANSFER (ta);	1345	TRANSFER (ta);
876	}	1346	}
877		1347
878	/** Coro ********************************************************************/	1348	/** Coro ********************************************************************/
879		1349
880	#define PRIO_MAX 3
881	#define PRIO_HIGH 1
882	#define PRIO_NORMAL 0
883	#define PRIO_LOW -1
884	#define PRIO_IDLE -3
885	#define PRIO_MIN -4
886
887	/* for Coro.pm */
888	static SV *coro_current;
889	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
890	static int coro_nready;
891
892	static void	1350	static void
893	coro_enq (SV *coro_sv)	1351	coro_enq (pTHX_ SV *coro_sv)
894	{	1352	{
895	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1353	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;
897	}	1354	}
898		1355
899	static SV *	1356	static SV *
900	coro_deq (int min_prio)	1357	coro_deq (pTHX)
901	{	1358	{
902	int prio = PRIO_MAX - PRIO_MIN;	1359	int prio;
903		1360
904	min_prio -= PRIO_MIN;
905	if (min_prio < 0)
906	min_prio = 0;
907
908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1361	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
909	if (AvFILLp (coro_ready [prio]) >= 0)	1362	if (AvFILLp (coro_ready [prio]) >= 0)
910	{
911	coro_nready--;
912	return av_shift (coro_ready [prio]);	1363	return av_shift (coro_ready [prio]);
913	}
914		1364
915	return 0;	1365	return 0;
916	}	1366	}
917		1367
918	static int	1368	static int
919	api_ready (SV *coro_sv)	1369	api_ready (SV *coro_sv)
920	{	1370	{
		1371	dTHX;
921	struct coro *coro;	1372	struct coro *coro;
922		1373
923	if (SvROK (coro_sv))	1374	if (SvROK (coro_sv))
924	coro_sv = SvRV (coro_sv);	1375	coro_sv = SvRV (coro_sv);
925		1376
926	coro = SvSTATE (coro_sv);	1377	coro = SvSTATE (coro_sv);
927		1378
928	if (coro->flags & CF_READY)	1379	if (coro->flags & CF_READY)
929	return 0;	1380	return 0;
930		1381
931	#if 0 /* this is actually harmless */
932	if (coro->flags & CF_RUNNING)
933	croak ("Coro::ready called on currently running coroutine");
934	#endif
935
936	coro->flags |= CF_READY;	1382	coro->flags |= CF_READY;
937		1383
938	LOCK;	1384	LOCK;
939	coro_enq (SvREFCNT_inc (coro_sv));	1385	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1386	++coro_nready;
940	UNLOCK;	1387	UNLOCK;
941		1388
942	return 1;	1389	return 1;
943	}	1390	}
944		1391
945	static int	1392	static int
946	api_is_ready (SV *coro_sv)	1393	api_is_ready (SV *coro_sv)
947	{	1394	{
		1395	dTHX;
948	return !!SvSTATE (coro_sv)->flags & CF_READY;	1396	return !!(SvSTATE (coro_sv)->flags & CF_READY);
949	}	1397	}
950		1398
951	static void	1399	static void
952	prepare_schedule (struct transfer_args *ta)	1400	prepare_schedule (pTHX_ struct transfer_args *ta)
953	{	1401	{
954	SV *prev, *next;	1402	SV *prev_sv, *next_sv;
955		1403
956	for (;;)	1404	for (;;)
957	{	1405	{
958	LOCK;	1406	LOCK;
959	next = coro_deq (PRIO_MIN);	1407	next_sv = coro_deq (aTHX);
		1408
		1409	/* nothing to schedule: call the idle handler */
		1410	if (expect_false (!next_sv))
		1411	{
		1412	dSP;
		1413	UNLOCK;
		1414
		1415	ENTER;
		1416	SAVETMPS;
		1417
		1418	PUSHMARK (SP);
		1419	PUTBACK;
		1420	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1421	SPAGAIN;
		1422
		1423	FREETMPS;
		1424	LEAVE;
		1425	continue;
		1426	}
		1427
		1428	ta->next = SvSTATE (next_sv);
		1429
		1430	/* cannot transfer to destroyed coros, skip and look for next */
		1431	if (expect_false (ta->next->flags & CF_DESTROYED))
		1432	{
		1433	UNLOCK;
		1434	SvREFCNT_dec (next_sv);
		1435	/* coro_nready is already taken care of by destroy */
		1436	continue;
		1437	}
		1438
		1439	--coro_nready;
960	UNLOCK;	1440	UNLOCK;
961
962	if (next)
963	break;	1441	break;
964
965	{
966	dSP;
967
968	ENTER;
969	SAVETMPS;
970
971	PUSHMARK (SP);
972	PUTBACK;
973	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
974
975	FREETMPS;
976	LEAVE;
977	}	1442	}
978	}
979
980	prev = SvRV (coro_current);
981	SvRV_set (coro_current, next);
982		1443
983	/* free this only after the transfer */	1444	/* free this only after the transfer */
		1445	prev_sv = SvRV (coro_current);
		1446	ta->prev = SvSTATE (prev_sv);
		1447	TRANSFER_CHECK (*ta);
		1448	assert (ta->next->flags & CF_READY);
		1449	ta->next->flags &= ~CF_READY;
		1450	SvRV_set (coro_current, next_sv);
		1451
984	LOCK;	1452	LOCK;
985	free_coro_mortal ();	1453	free_coro_mortal (aTHX);
		1454	coro_mortal = prev_sv;
986	UNLOCK;	1455	UNLOCK;
987	coro_mortal = prev;
988
989	assert (!SvROK(prev));//D
990	assert (!SvROK(next));//D
991
992	ta->prev = SvSTATE (prev);
993	ta->next = SvSTATE (next);
994	ta->flags = TRANSFER_SAVE_ALL;
995
996	assert (ta->flags & CF_READY);
997	ta->next->flags &= ~CF_READY;
998	}	1456	}
999		1457
1000	static void	1458	static void
1001	prepare_cede (struct transfer_args *ta)	1459	prepare_cede (pTHX_ struct transfer_args *ta)
1002	{	1460	{
1003	api_ready (coro_current);	1461	api_ready (coro_current);
1004
1005	prepare_schedule (ta);	1462	prepare_schedule (aTHX_ ta);
		1463	}
		1464
		1465	static int
		1466	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1467	{
		1468	if (coro_nready)
		1469	{
		1470	SV *prev = SvRV (coro_current);
		1471	prepare_schedule (aTHX_ ta);
		1472	api_ready (prev);
		1473	return 1;
		1474	}
		1475	else
		1476	return 0;
1006	}	1477	}
1007		1478
1008	static void	1479	static void
1009	api_schedule (void)	1480	api_schedule (void)
1010	{	1481	{
		1482	dTHX;
1011	struct transfer_args ta;	1483	struct transfer_args ta;
1012		1484
1013	prepare_schedule (&ta);	1485	prepare_schedule (aTHX_ &ta);
1014	TRANSFER (ta);	1486	TRANSFER (ta);
1015	}	1487	}
1016		1488
		1489	static int
		1490	api_cede (void)
		1491	{
		1492	dTHX;
		1493	struct transfer_args ta;
		1494
		1495	prepare_cede (aTHX_ &ta);
		1496
		1497	if (expect_true (ta.prev != ta.next))
		1498	{
		1499	TRANSFER (ta);
		1500	return 1;
		1501	}
		1502	else
		1503	return 0;
		1504	}
		1505
		1506	static int
		1507	api_cede_notself (void)
		1508	{
		1509	dTHX;
		1510	struct transfer_args ta;
		1511
		1512	if (prepare_cede_notself (aTHX_ &ta))
		1513	{
		1514	TRANSFER (ta);
		1515	return 1;
		1516	}
		1517	else
		1518	return 0;
		1519	}
		1520
1017	static void	1521	static void
1018	api_cede (void)	1522	api_trace (SV *coro_sv, int flags)
1019	{	1523	{
1020	struct transfer_args ta;	1524	dTHX;
		1525	struct coro *coro = SvSTATE (coro_sv);
1021		1526
1022	prepare_cede (&ta);	1527	if (flags & CC_TRACE)
1023	TRANSFER (ta);	1528	{
1024	}	1529	if (!coro->cctx)
		1530	coro->cctx = cctx_new ();
		1531	else if (!(coro->cctx->flags & CC_TRACE))
		1532	croak ("cannot enable tracing on coroutine with custom stack");
1025		1533
		1534	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1535	}
		1536	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1537	{
		1538	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1539
		1540	if (coro->flags & CF_RUNNING)
		1541	PL_runops = RUNOPS_DEFAULT;
		1542	else
		1543	coro->slot->runops = RUNOPS_DEFAULT;
		1544	}
		1545	}
		1546
1026	MODULE = Coro::State PACKAGE = Coro::State	1547	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1027		1548
1028	PROTOTYPES: DISABLE	1549	PROTOTYPES: DISABLE
1029		1550
1030	BOOT:	1551	BOOT:
1031	{	1552	{
1032	#ifdef USE_ITHREADS	1553	#ifdef USE_ITHREADS
1033	MUTEX_INIT (&coro_mutex);	1554	MUTEX_INIT (&coro_mutex);
1034	#endif	1555	#endif
1035	BOOT_PAGESIZE;	1556	BOOT_PAGESIZE;
1036		1557
		1558	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1559	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1560
		1561	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1562	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1563	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1564	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1565
		1566	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1567	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1568	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1569
1037	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1570	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1038		1571
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1572	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1040	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1573	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1041	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1574	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1575	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1042		1576
1043	main_mainstack = PL_mainstack;	1577	main_mainstack = PL_mainstack;
		1578	main_top_env = PL_top_env;
		1579
		1580	while (main_top_env->je_prev)
		1581	main_top_env = main_top_env->je_prev;
1044		1582
1045	coroapi.ver = CORO_API_VERSION;	1583	coroapi.ver = CORO_API_VERSION;
		1584	coroapi.rev = CORO_API_REVISION;
1046	coroapi.transfer = api_transfer;	1585	coroapi.transfer = api_transfer;
1047		1586
1048	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1587	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1049	}	1588	}
1050		1589
1051	SV *	1590	SV *
1052	new (char *klass, ...)	1591	new (char *klass, ...)
1053	CODE:	1592	CODE:
1054	{	1593	{
1055	struct coro *coro;	1594	struct coro *coro;
		1595	MAGIC *mg;
1056	HV *hv;	1596	HV *hv;
1057	int i;	1597	int i;
1058		1598
1059	Newz (0, coro, 1, struct coro);	1599	Newz (0, coro, 1, struct coro);
1060	coro->args = newAV ();	1600	coro->args = newAV ();
1061	coro->flags = CF_NEW;	1601	coro->flags = CF_NEW;
1062		1602
		1603	if (coro_first) coro_first->prev = coro;
		1604	coro->next = coro_first;
		1605	coro_first = coro;
		1606
1063	hv = newHV ();	1607	coro->hv = hv = newHV ();
1064	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1608	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1609	mg->mg_flags |= MGf_DUP;
1065	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1610	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1066		1611
		1612	av_extend (coro->args, items - 1);
1067	for (i = 1; i < items; i++)	1613	for (i = 1; i < items; i++)
1068	av_push (coro->args, newSVsv (ST (i)));	1614	av_push (coro->args, newSVsv (ST (i)));
1069	}	1615	}
1070	OUTPUT:	1616	OUTPUT:
1071	RETVAL	1617	RETVAL
1072		1618
		1619	# these not obviously related functions are all rolled into the same xs
		1620	# function to increase chances that they all will call transfer with the same
		1621	# stack offset
1073	void	1622	void
1074	_set_stacklevel (...)	1623	_set_stacklevel (...)
1075	ALIAS:	1624	ALIAS:
1076	Coro::State::transfer = 1	1625	Coro::State::transfer = 1
1077	Coro::schedule = 2	1626	Coro::schedule = 2
1078	Coro::cede = 3	1627	Coro::cede = 3
1079	Coro::Cont::yield = 4	1628	Coro::cede_notself = 4
1080	CODE:	1629	CODE:
1081	{	1630	{
1082	struct transfer_args ta;	1631	struct transfer_args ta;
1083		1632
		1633	PUTBACK;
1084	switch (ix)	1634	switch (ix)
1085	{	1635	{
1086	case 0:	1636	case 0:
1087	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1637	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1088	ta.next = 0;	1638	ta.next = 0;
1089	ta.flags = TRANSFER_SET_STACKLEVEL;
1090	break;	1639	break;
1091		1640
1092	case 1:	1641	case 1:
1093	if (items != 3)	1642	if (items != 2)
1094	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1643	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1095		1644
1096	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1645	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1097	break;	1646	break;
1098		1647
1099	case 2:	1648	case 2:
1100	prepare_schedule (&ta);	1649	prepare_schedule (aTHX_ &ta);
1101	break;	1650	break;
1102		1651
1103	case 3:	1652	case 3:
1104	prepare_cede (&ta);	1653	prepare_cede (aTHX_ &ta);
1105	break;	1654	break;
1106		1655
1107	case 4:	1656	case 4:
1108	{	1657	if (!prepare_cede_notself (aTHX_ &ta))
1109	SV *yieldstack;	1658	XSRETURN_EMPTY;
1110	SV *sv;
1111	AV *defav = GvAV (PL_defgv);
1112		1659
1113	yieldstack = *hv_fetch (
1114	(HV *)SvRV (coro_current),
1115	"yieldstack", sizeof ("yieldstack") - 1,
1116	0
1117	);
1118
1119	/* set up @_ -- ugly */
1120	av_clear (defav);
1121	av_fill (defav, items - 1);
1122	while (items--)
1123	av_store (defav, items, SvREFCNT_inc (ST(items)));
1124
1125	sv = av_pop ((AV *)SvRV (yieldstack));
1126	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1127	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1128	ta.flags = 0;
1129	SvREFCNT_dec (sv);
1130	}
1131	break;	1660	break;
1132
1133	}	1661	}
		1662	SPAGAIN;
1134		1663
		1664	BARRIER;
		1665	PUTBACK;
1135	TRANSFER (ta);	1666	TRANSFER (ta);
		1667	SPAGAIN; /* might be the sp of a different coroutine now */
		1668	/* be extra careful not to ever do anything after TRANSFER */
1136	}	1669	}
1137		1670
1138	void	1671	bool
1139	_clone_state_from (SV *dst, SV *src)	1672	_destroy (SV *coro_sv)
1140	CODE:	1673	CODE:
1141	{	1674	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1142	struct coro *coro_src = SvSTATE (src);	1675	OUTPUT:
1143		1676	RETVAL
1144	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1145
1146	++coro_src->refcnt;
1147	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1148	}
1149		1677
1150	void	1678	void
1151	_exit (code)	1679	_exit (code)
1152	int code	1680	int code
1153	PROTOTYPE: $	1681	PROTOTYPE: $
1154	CODE:	1682	CODE:
1155	_exit (code);	1683	_exit (code);
1156		1684
1157	int	1685	int
		1686	cctx_stacksize (int new_stacksize = 0)
		1687	CODE:
		1688	RETVAL = coro_stacksize;
		1689	if (new_stacksize)
		1690	coro_stacksize = new_stacksize;
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	int
1158	cctx_count ()	1695	cctx_count ()
1159	CODE:	1696	CODE:
1160	RETVAL = cctx_count;	1697	RETVAL = cctx_count;
1161	OUTPUT:	1698	OUTPUT:
1162	RETVAL	1699	RETVAL
…		…
1166	CODE:	1703	CODE:
1167	RETVAL = cctx_idle;	1704	RETVAL = cctx_idle;
1168	OUTPUT:	1705	OUTPUT:
1169	RETVAL	1706	RETVAL
1170		1707
		1708	void
		1709	list ()
		1710	PPCODE:
		1711	{
		1712	struct coro *coro;
		1713	for (coro = coro_first; coro; coro = coro->next)
		1714	if (coro->hv)
		1715	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1716	}
		1717
		1718	void
		1719	call (Coro::State coro, SV *coderef)
		1720	ALIAS:
		1721	eval = 1
		1722	CODE:
		1723	{
		1724	if (coro->mainstack)
		1725	{
		1726	struct coro temp;
		1727
		1728	if (!(coro->flags & CF_RUNNING))
		1729	{
		1730	PUTBACK;
		1731	save_perl (aTHX_ &temp);
		1732	load_perl (aTHX_ coro);
		1733	}
		1734
		1735	{
		1736	dSP;
		1737	ENTER;
		1738	SAVETMPS;
		1739	PUTBACK;
		1740	PUSHSTACK;
		1741	PUSHMARK (SP);
		1742
		1743	if (ix)
		1744	eval_sv (coderef, 0);
		1745	else
		1746	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1747
		1748	POPSTACK;
		1749	SPAGAIN;
		1750	FREETMPS;
		1751	LEAVE;
		1752	PUTBACK;
		1753	}
		1754
		1755	if (!(coro->flags & CF_RUNNING))
		1756	{
		1757	save_perl (aTHX_ coro);
		1758	load_perl (aTHX_ &temp);
		1759	SPAGAIN;
		1760	}
		1761	}
		1762	}
		1763
		1764	SV *
		1765	is_ready (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	is_ready = CF_READY
		1769	is_running = CF_RUNNING
		1770	is_new = CF_NEW
		1771	is_destroyed = CF_DESTROYED
		1772	CODE:
		1773	RETVAL = boolSV (coro->flags & ix);
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	void
		1778	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1779
		1780	SV *
		1781	has_stack (Coro::State coro)
		1782	PROTOTYPE: $
		1783	CODE:
		1784	RETVAL = boolSV (!!coro->cctx);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	int
		1789	is_traced (Coro::State coro)
		1790	PROTOTYPE: $
		1791	CODE:
		1792	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1793	OUTPUT:
		1794	RETVAL
		1795
		1796	IV
		1797	rss (Coro::State coro)
		1798	PROTOTYPE: $
		1799	ALIAS:
		1800	usecount = 1
		1801	CODE:
		1802	switch (ix)
		1803	{
		1804	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1805	case 1: RETVAL = coro->usecount; break;
		1806	}
		1807	OUTPUT:
		1808	RETVAL
		1809
		1810
1171	MODULE = Coro::State PACKAGE = Coro	1811	MODULE = Coro::State PACKAGE = Coro
1172		1812
1173	BOOT:	1813	BOOT:
1174	{	1814	{
1175	int i;	1815	int i;
1176		1816
		1817	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1818	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1819	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1820
		1821	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1822	SvREADONLY_on (coro_current);
		1823
1177	coro_stash = gv_stashpv ("Coro", TRUE);	1824	coro_stash = gv_stashpv ("Coro", TRUE);
1178		1825
1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1826	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1827	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1828	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1829	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1830	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1831	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185		1832
1186	coro_current = get_sv ("Coro::current", FALSE);
1187	SvREADONLY_on (coro_current);
1188
1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1833	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190	coro_ready[i] = newAV ();	1834	coro_ready[i] = newAV ();
1191		1835
1192	{	1836	{
1193	SV *sv = perl_get_sv("Coro::API", 1);	1837	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1838	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194		1839
1195	coroapi.schedule = api_schedule;	1840	coroapi.schedule = api_schedule;
1196	coroapi.cede = api_cede;	1841	coroapi.cede = api_cede;
		1842	coroapi.cede_notself = api_cede_notself;
1197	coroapi.ready = api_ready;	1843	coroapi.ready = api_ready;
1198	coroapi.is_ready = api_is_ready;	1844	coroapi.is_ready = api_is_ready;
1199	coroapi.nready = &coro_nready;	1845	coroapi.nready = &coro_nready;
1200	coroapi.current = coro_current;	1846	coroapi.current = coro_current;
1201		1847
1202	GCoroAPI = &coroapi;	1848	GCoroAPI = &coroapi;
1203	sv_setiv (sv, (IV)&coroapi);	1849	sv_setiv (sv, (IV)&coroapi);
1204	SvREADONLY_on (sv);	1850	SvREADONLY_on (sv);
1205	}	1851	}
1206	}	1852	}
		1853
		1854	void
		1855	_set_current (SV *current)
		1856	PROTOTYPE: $
		1857	CODE:
		1858	SvREFCNT_dec (SvRV (coro_current));
		1859	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1207		1860
1208	int	1861	int
1209	prio (Coro::State coro, int newprio = 0)	1862	prio (Coro::State coro, int newprio = 0)
1210	ALIAS:	1863	ALIAS:
1211	nice = 1	1864	nice = 1
…		…
1214	RETVAL = coro->prio;	1867	RETVAL = coro->prio;
1215		1868
1216	if (items > 1)	1869	if (items > 1)
1217	{	1870	{
1218	if (ix)	1871	if (ix)
1219	newprio += coro->prio;	1872	newprio = coro->prio - newprio;
1220		1873
1221	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1874	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1222	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1875	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1223		1876
1224	coro->prio = newprio;	1877	coro->prio = newprio;
1225	}	1878	}
1226	}	1879	}
		1880	OUTPUT:
		1881	RETVAL
1227		1882
1228	SV *	1883	SV *
1229	ready (SV *self)	1884	ready (SV *self)
1230	PROTOTYPE: $	1885	PROTOTYPE: $
1231	CODE:	1886	CODE:
1232	RETVAL = boolSV (api_ready (self));	1887	RETVAL = boolSV (api_ready (self));
1233	OUTPUT:	1888	OUTPUT:
1234	RETVAL	1889	RETVAL
1235		1890
1236	SV *
1237	is_ready (SV *self)
1238	PROTOTYPE: $
1239	CODE:
1240	RETVAL = boolSV (api_is_ready (self));
1241	OUTPUT:
1242	RETVAL
1243
1244	int	1891	int
1245	nready (...)	1892	nready (...)
1246	PROTOTYPE:	1893	PROTOTYPE:
1247	CODE:	1894	CODE:
1248	RETVAL = coro_nready;	1895	RETVAL = coro_nready;
1249	OUTPUT:	1896	OUTPUT:
1250	RETVAL	1897	RETVAL
1251		1898
1252	void	1899	void
1253	_set_current (SV *current)	1900	throw (Coro::State self, SV *throw = &PL_sv_undef)
1254	PROTOTYPE: $	1901	PROTOTYPE: $;$
		1902	CODE:
		1903	SvREFCNT_dec (self->throw);
		1904	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1905
		1906	void
		1907	swap_defsv (Coro::State self)
		1908	PROTOTYPE: $
		1909	ALIAS:
		1910	swap_defav = 1
		1911	CODE:
		1912	if (!self->slot)
		1913	croak ("cannot swap state with coroutine that has no saved state");
		1914	else
		1915	{
		1916	SV **src = ix ? (SV *)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1917	SV **dst = ix ? self->slot->defav : self->slot->defsv;
		1918
		1919	SV *tmp = *src; *src = *dst; *dst = tmp;
		1920	}
		1921
		1922	# for async_pool speedup
		1923	void
		1924	_pool_1 (SV *cb)
1255	CODE:	1925	CODE:
1256	SvREFCNT_dec (SvRV (coro_current));	1926	{
1257	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1927	struct coro *coro = SvSTATE (coro_current);
		1928	HV *hv = (HV *)SvRV (coro_current);
		1929	AV *defav = GvAV (PL_defgv);
		1930	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1931	AV *invoke_av;
		1932	int i, len;
		1933
		1934	if (!invoke)
		1935	{
		1936	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1937	croak ("\3async_pool terminate\2\n");
		1938	}
		1939
		1940	SvREFCNT_dec (coro->saved_deffh);
		1941	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1942
		1943	hv_store (hv, "desc", sizeof ("desc") - 1,
		1944	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1945
		1946	invoke_av = (AV *)SvRV (invoke);
		1947	len = av_len (invoke_av);
		1948
		1949	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1950
		1951	if (len > 0)
		1952	{
		1953	av_fill (defav, len - 1);
		1954	for (i = 0; i < len; ++i)
		1955	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1956	}
		1957
		1958	SvREFCNT_dec (invoke);
		1959	}
		1960
		1961	void
		1962	_pool_2 (SV *cb)
		1963	CODE:
		1964	{
		1965	struct coro *coro = SvSTATE (coro_current);
		1966
		1967	sv_setsv (cb, &PL_sv_undef);
		1968
		1969	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1970	coro->saved_deffh = 0;
		1971
		1972	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1973	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1974	{
		1975	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1976	croak ("\3async_pool terminate\2\n");
		1977	}
		1978
		1979	av_clear (GvAV (PL_defgv));
		1980	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1981	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1982
		1983	coro->prio = 0;
		1984
		1985	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1986	api_trace (coro_current, 0);
		1987
		1988	av_push (av_async_pool, newSVsv (coro_current));
		1989	}
		1990
1258		1991
1259	MODULE = Coro::State PACKAGE = Coro::AIO	1992	MODULE = Coro::State PACKAGE = Coro::AIO
1260		1993
1261	SV *	1994	SV *
1262	_get_state ()	1995	_get_state ()
1263	CODE:	1996	CODE:
1264	{	1997	{
1265	struct {	1998	struct io_state *data;
1266	int errorno;
1267	int laststype;
1268	int laststatval;
1269	Stat_t statcache;
1270	} data;
1271		1999
		2000	RETVAL = newSV (sizeof (struct io_state));
		2001	data = (struct io_state *)SvPVX (RETVAL);
		2002	SvCUR_set (RETVAL, sizeof (struct io_state));
		2003	SvPOK_only (RETVAL);
		2004
1272	data.errorno = errno;	2005	data->errorno = errno;
1273	data.laststype = PL_laststype;	2006	data->laststype = PL_laststype;
1274	data.laststatval = PL_laststatval;	2007	data->laststatval = PL_laststatval;
1275	data.statcache = PL_statcache;	2008	data->statcache = PL_statcache;
1276
1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
1278	}	2009	}
1279	OUTPUT:	2010	OUTPUT:
1280	RETVAL	2011	RETVAL
1281		2012
1282	void	2013	void
1283	_set_state (char *data_)	2014	_set_state (char *data_)
1284	PROTOTYPE: $	2015	PROTOTYPE: $
1285	CODE:	2016	CODE:
1286	{	2017	{
1287	struct {	2018	struct io_state *data = (void *)data_;
1288	int errorno;
1289	int laststype;
1290	int laststatval;
1291	Stat_t statcache;
1292	} *data = (void *)data_;
1293		2019
1294	errno = data->errorno;	2020	errno = data->errorno;
1295	PL_laststype = data->laststype;	2021	PL_laststype = data->laststype;
1296	PL_laststatval = data->laststatval;	2022	PL_laststatval = data->laststatval;
1297	PL_statcache = data->statcache;	2023	PL_statcache = data->statcache;
1298	}	2024	}
		2025

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