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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.125 by root, Mon Dec 11 20:54:45 2006 UTC vs.
Revision 1.227 by root, Sat Apr 5 22:29:54 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	/* 5.8.7 */
44	#ifndef SvRV_set
45	# define SvRV_set(s,v) SvRV(s) = (v)
46	#endif
47
48	#include <stdio.h>	12	#include <stdio.h>
49	#include <errno.h>	13	#include <errno.h>
50	#include <assert.h>	14	#include <assert.h>
51		15	#include <inttypes.h> /* portable stdint.h */
52	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
53	# undef STACKGUARD
54	#endif
55
56	#ifndef STACKGUARD
57	# define STACKGUARD 0
58	#endif
59		16
60	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
61	# include <unistd.h>	18	# include <unistd.h>
62	# include <sys/mman.h>	19	# include <sys/mman.h>
63	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
78	#else	35	#else
79	# define PAGESIZE 0	36	# define PAGESIZE 0
80	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
81	#endif	38	#endif
82		39
83	/* The next macro should declare a variable stacklevel that contains and approximation	40	#if CORO_USE_VALGRIND
84	* to the current C stack pointer. Its property is that it changes with each call	41	# include <valgrind/valgrind.h>
85	* 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. */
86	#define dSTACKLEVEL int stacklevel	110	#define dSTACKLEVEL volatile char stacklevel
87	#define STACKLEVEL ((void *)&stacklevel)	111	#define STACKLEVEL ((void *)&stacklevel)
88		112
89	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
90		114
91	#if __GNUC__ >= 3	115	#if __GNUC__ >= 3
92	# 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))
93	#else	119	#else
94	# define attribute(x)	120	# define attribute(x)
		121	# define BARRIER
		122	# define expect(expr,value) (expr)
95	#endif	123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
96		127
97	#define NOINLINE attribute ((noinline))	128	#define NOINLINE attribute ((noinline))
98		129
99	#include "CoroAPI.h"	130	#include "CoroAPI.h"
100		131
…		…
105	#else	136	#else
106	# define LOCK (void)0	137	# define LOCK (void)0
107	# define UNLOCK (void)0	138	# define UNLOCK (void)0
108	#endif	139	#endif
109		140
		141	/* helper storage struct for Coro::AIO */
110	struct io_state	142	struct io_state
111	{	143	{
112	int errorno;	144	int errorno;
113	I32 laststype;	145	I32 laststype;
114	int laststatval;	146	int laststatval;
115	Stat_t statcache;	147	Stat_t statcache;
116	};	148	};
117		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
118	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
119	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;
120	static HV *coro_state_stash, *coro_stash;	154	static HV *coro_state_stash, *coro_stash;
121	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;
122		167
123	static struct coro_cctx *cctx_first;	168	static struct coro_cctx *cctx_first;
124	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	};
125		179
126	/* this is a structure representing a c-level coroutine */	180	/* this is a structure representing a c-level coroutine */
127	typedef struct coro_cctx {	181	typedef struct coro_cctx {
128	struct coro_cctx *next;	182	struct coro_cctx *next;
129		183
130	/* the stack */	184	/* the stack */
131	void *sptr;	185	void *sptr;
132	long ssize; /* positive == mmap, otherwise malloc */	186	size_t ssize;
133		187
134	/* cpu state */	188	/* cpu state */
135	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 */
136	JMPENV *top_env;	191	JMPENV *top_env;
137	coro_context cctx;	192	coro_context cctx;
138		193
139	int inuse;
140
141	#if USE_VALGRIND	194	#if CORO_USE_VALGRIND
142	int valgrind_id;	195	int valgrind_id;
143	#endif	196	#endif
		197	unsigned char flags;
144	} coro_cctx;	198	} coro_cctx;
145		199
146	enum {	200	enum {
147	CF_RUNNING = 0x0001, /* coroutine is running */	201	CF_RUNNING = 0x0001, /* coroutine is running */
148	CF_READY = 0x0002, /* coroutine is ready */	202	CF_READY = 0x0002, /* coroutine is ready */
149	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 */
150	};	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))
151		219
152	/* this is a structure representing a perl-level coroutine */	220	/* this is a structure representing a perl-level coroutine */
153	struct coro {	221	struct coro {
154	/* the c coroutine allocated to this perl coroutine, if any */	222	/* the c coroutine allocated to this perl coroutine, if any */
155	coro_cctx *cctx;	223	coro_cctx *cctx;
156		224
		225	/* process data */
		226	AV *mainstack;
		227	perl_slots *slot; /* basically the saved sp */
		228
157	/* data associated with this coroutine (initial args) */	229	AV *args; /* data associated with this coroutine (initial args) */
158	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
159	int refcnt;
160	int save; /* CORO_SAVE flags */
161	int flags; /* CF_ flags */	231	int flags; /* CF_ flags */
		232	HV *hv; /* the perl hash associated with this coro, if any */
162		233
163	/* optionally saved, might be zero */	234	/* statistics */
164	AV *defav; /* @_ */	235	int usecount; /* number of transfers to this coro */
165	SV *defsv; /* $_ */
166	SV *errsv; /* $@ */
167	SV *irssv; /* $/ */
168	SV *irssv_sv; /* real $/ cache */
169
170	#define VAR(name,type) type name;
171	# include "state.h"
172	#undef VAR
173		236
174	/* coro process data */	237	/* coro process data */
175	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;
176	};	246	};
177		247
178	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
179	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
180		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
181	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 *
182	coro_clone_padlist (CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
183	{	300	{
184	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
185	AV *newpadlist, *newpad;	302	AV *newpadlist, *newpad;
186		303
187	newpadlist = newAV ();	304	newpadlist = newAV ();
…		…
199		316
200	return newpadlist;	317	return newpadlist;
201	}	318	}
202		319
203	static void	320	static void
204	free_padlist (AV *padlist)	321	free_padlist (pTHX_ AV *padlist)
205	{	322	{
206	/* may be during global destruction */	323	/* may be during global destruction */
207	if (SvREFCNT (padlist))	324	if (SvREFCNT (padlist))
208	{	325	{
209	I32 i = AvFILLp (padlist);	326	I32 i = AvFILLp (padlist);
…		…
230	AV *padlist;	347	AV *padlist;
231	AV *av = (AV *)mg->mg_obj;	348	AV *av = (AV *)mg->mg_obj;
232		349
233	/* casting is fun. */	350	/* casting is fun. */
234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
235	free_padlist (padlist);	352	free_padlist (aTHX_ padlist);
236
237	SvREFCNT_dec (av);
238		353
239	return 0;	354	return 0;
240	}	355	}
241		356
242	#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
243		359
244	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	};
245		364
246	#define CORO_MAGIC(cv) \	365	#define CORO_MAGIC(sv,type) \
247	SvMAGIC (cv) \	366	SvMAGIC (sv) \
248	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	367	? SvMAGIC (sv)->mg_type == type \
249	? SvMAGIC (cv) \	368	? SvMAGIC (sv) \
250	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	369	: mg_find (sv, type) \
251	: 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))
252		400
253	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
254	static void	402	static void
255	get_padlist (CV *cv)	403	get_padlist (pTHX_ CV *cv)
256	{	404	{
257	MAGIC *mg = CORO_MAGIC (cv);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
258	AV *av;	406	AV *av;
259		407
260	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
261	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
262	else	410	else
263	{	411	{
264	#if 0	412	#if CORO_PREFER_PERL_FUNCTIONS
265	/* this is probably cleaner, but also slower? */	413	/* this is probably cleaner, but also slower? */
266	CV *cp = Perl_cv_clone (cv);	414	CV *cp = Perl_cv_clone (cv);
267	CvPADLIST (cv) = CvPADLIST (cp);	415	CvPADLIST (cv) = CvPADLIST (cp);
268	CvPADLIST (cp) = 0;	416	CvPADLIST (cp) = 0;
269	SvREFCNT_dec (cp);	417	SvREFCNT_dec (cp);
270	#else	418	#else
271	CvPADLIST (cv) = coro_clone_padlist (cv);	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
272	#endif	420	#endif
273	}	421	}
274	}	422	}
275		423
276	static void	424	static void
277	put_padlist (CV *cv)	425	put_padlist (pTHX_ CV *cv)
278	{	426	{
279	MAGIC *mg = CORO_MAGIC (cv);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
280	AV *av;	428	AV *av;
281		429
282	if (!mg)	430	if (expect_false (!mg))
283	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
284	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
285	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
286	mg->mg_virtual = &vtbl_coro;
287	mg->mg_obj = (SV *)newAV ();
288	}
289		432
290	av = (AV *)mg->mg_obj;	433	av = (AV *)mg->mg_obj;
291		434
292	if (AvFILLp (av) >= AvMAX (av))	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
293	av_extend (av, AvMAX (av) + 1);	436	av_extend (av, AvMAX (av) + 1);
294		437
295	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
296	}	439	}
297		440
298	#define SB do {	441	/** load & save, init *******************************************************/
299	#define SE } while (0)
300
301	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
302		442
303	static void	443	static void
304	load_perl (Coro__State c)	444	load_perl (pTHX_ Coro__State c)
305	{	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
306	#define VAR(name,type) PL_ ## name = c->name;	456	#define VAR(name,type) PL_ ## name = slot->name;
307	# include "state.h"	457	# include "state.h"
308	#undef VAR	458	#undef VAR
309
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
313	if (c->irssv)
314	{
315	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
316	SvREFCNT_dec (c->irssv);
317	else
318	{
319	REPLACE_SV (PL_rs, c->irssv);
320	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
321	sv_setsv (c->irssv_sv, PL_rs);
322	}
323	}
324		459
325	{	460	{
326	dSP;	461	dSP;
		462
327	CV *cv;	463	CV *cv;
328		464
329	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
330	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
331	{	467	{
332	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
333	CvDEPTH (cv) = PTR2IV (POPs);	469	CvDEPTH (cv) = PTR2IV (POPs);
334	CvPADLIST (cv) = (AV *)POPs;	470	CvPADLIST (cv) = (AV *)POPs;
335	}	471	}
336		472
337	PUTBACK;	473	PUTBACK;
338	}	474	}
339	}	475	}
340		476
341	static void	477	static void
342	save_perl (Coro__State c)	478	save_perl (pTHX_ Coro__State c)
343	{	479	{
344	{	480	{
345	dSP;	481	dSP;
346	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
347	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
350	/*	486	/*
351	* 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
352	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
353	*/	489	*/
354		490
355	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
356	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
357	for (;;)	493	for (;;)
358	{	494	{
359	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
360	{	496	{
361	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
362		498
363	if (CxTYPE (cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
364	{	500	{
365	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
366		502
367	if (CvDEPTH (cv))	503	if (expect_true (CvDEPTH (cv)))
368	{	504	{
369	EXTEND (SP, 3);	505	EXTEND (SP, 3);
370
371	PUSHs ((SV *)CvPADLIST (cv));	506	PUSHs ((SV *)CvPADLIST (cv));
372	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
374		509
375	CvDEPTH (cv) = 0;	510	CvDEPTH (cv) = 0;
376	get_padlist (cv);	511	get_padlist (aTHX_ cv);
377	}	512	}
378	}	513	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE (cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	514	}
388		515
389	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
390	break;	517	break;
391		518
392	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
393	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
394	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
395	}	522	}
396		523
397	PUTBACK;	524	PUTBACK;
398	}	525	}
399		526
400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
403	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	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 */
404		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
405	#define VAR(name,type)c->name = PL_ ## name;	549	#define VAR(name,type) slot->name = PL_ ## name;
406	# include "state.h"	550	# include "state.h"
407	#undef VAR	551	#undef VAR
		552	}
408	}	553	}
409		554
410	/*	555	/*
411	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
412	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
413	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
414	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
415	*/	560	*/
		561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
416	static void	564	static void
417	coro_init_stacks ()	565	coro_init_stacks (pTHX)
418	{	566	{
419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	567	PL_curstackinfo = new_stackinfo(32, 8);
420	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
421	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423		571
424	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
425	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427		575
428	New(50,PL_tmps_stack,128,SV*);	576	New(50,PL_tmps_stack,32,SV*);
429	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
430	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
431	PL_tmps_max = 128;	579	PL_tmps_max = 32;
432		580
433	New(54,PL_markstack,32,I32);	581	New(54,PL_markstack,16,I32);
434	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
435	PL_markstack_max = PL_markstack + 32;	583	PL_markstack_max = PL_markstack + 16;
436		584
437	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
438	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
439	#endif	587	#endif
440		588
441	New(54,PL_scopestack,32,I32);	589	New(54,PL_scopestack,8,I32);
442	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
443	PL_scopestack_max = 32;	591	PL_scopestack_max = 8;
444		592
445	New(54,PL_savestack,64,ANY);	593	New(54,PL_savestack,24,ANY);
446	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
447	PL_savestack_max = 64;	595	PL_savestack_max = 24;
448		596
449	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,9,0)
450	New(54,PL_retstack,16,OP*);	598	New(54,PL_retstack,4,OP*);
451	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
452	PL_retstack_max = 16;	600	PL_retstack_max = 4;
453	#endif	601	#endif
454	}	602	}
		603	#endif
455		604
456	/*	605	/*
457	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
458	*/	607	*/
459	static void	608	static void
460	coro_destroy_stacks ()	609	coro_destroy_stacks (pTHX)
461	{	610	{
462	if (!IN_DESTRUCT)
463	{
464	/* is this ugly, I ask? */
465	LEAVE_SCOPE (0);
466
467	/* sure it is, but more important: is it correct?? :/ */
468	FREETMPS;
469
470	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
471	}
472
473	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
474	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
475		613
476	while (PL_curstackinfo)	614	while (PL_curstackinfo)
477	{	615	{
478	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
479		617
480	{ /*D*//*remove*/
481	dSP;
482	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
483	PUTBACK; /* possibly superfluous */
484	}
485
486	if (!IN_DESTRUCT)	618	if (!IN_DESTRUCT)
487	{
488	dounwind (-1);/*D*//*remove*/
489	SvREFCNT_dec (PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
490	}
491		620
492	Safefree (PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
493	Safefree (PL_curstackinfo);	622	Safefree (PL_curstackinfo);
494	PL_curstackinfo = p;	623	PL_curstackinfo = p;
495	}	624	}
…		…
501	#if !PERL_VERSION_ATLEAST (5,9,0)	630	#if !PERL_VERSION_ATLEAST (5,9,0)
502	Safefree (PL_retstack);	631	Safefree (PL_retstack);
503	#endif	632	#endif
504	}	633	}
505		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
506	static void	724	static void
507	setup_coro (struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
508	{	726	{
509	/*	727	/*
510	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
511	*/	729	*/
512
513	coro_init_stacks ();	730	coro_init_stacks (aTHX);
514		731
		732	PL_runops = RUNOPS_DEFAULT;
515	PL_curcop = &PL_compiling;	733	PL_curcop = &PL_compiling;
516	PL_in_eval = EVAL_NULL;	734	PL_in_eval = EVAL_NULL;
		735	PL_comppad = 0;
517	PL_curpm = 0;	736	PL_curpm = 0;
		737	PL_curpad = 0;
518	PL_localizing = 0;	738	PL_localizing = 0;
519	PL_dirty = 0;	739	PL_dirty = 0;
520	PL_restartop = 0;	740	PL_restartop = 0;
521		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
522	{	753	{
523	dSP;	754	dSP;
524	LOGOP myop;	755	LOGOP myop;
525		756
526	SvREFCNT_dec (GvAV (PL_defgv));
527	GvAV (PL_defgv) = coro->args; coro->args = 0;
528
529	Zero (&myop, 1, LOGOP);	757	Zero (&myop, 1, LOGOP);
530	myop.op_next = Nullop;	758	myop.op_next = Nullop;
531	myop.op_flags = OPf_WANT_VOID;	759	myop.op_flags = OPf_WANT_VOID;
532		760
533	PUSHMARK (SP);	761	PUSHMARK (SP);
534	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	762	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
535	PUTBACK;	763	PUTBACK;
536	PL_op = (OP *)&myop;	764	PL_op = (OP *)&myop;
537	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	765	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
538	SPAGAIN;	766	SPAGAIN;
539	}	767	}
540		768
541	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;
542	}	775	}
543		776
544	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
545	free_coro_mortal ()	814	free_coro_mortal (pTHX)
546	{	815	{
547	if (coro_mortal)	816	if (expect_true (coro_mortal))
548	{	817	{
549	SvREFCNT_dec (coro_mortal);	818	SvREFCNT_dec (coro_mortal);
550	coro_mortal = 0;	819	coro_mortal = 0;
551	}	820	}
552	}	821	}
553		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
554	/* inject a fake call to Coro::State::_cctx_init into the execution */	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 */
555	static void NOINLINE	950	static void NOINLINE
556	prepare_cctx (coro_cctx *cctx)	951	cctx_prepare (pTHX_ coro_cctx *cctx)
557	{	952	{
558	dSP;	953	dSP;
559	LOGOP myop;	954	LOGOP myop;
		955
		956	PL_top_env = &PL_start_env;
		957
		958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
560		960
561	Zero (&myop, 1, LOGOP);	961	Zero (&myop, 1, LOGOP);
562	myop.op_next = PL_op;	962	myop.op_next = PL_op;
563	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	963	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
564		964
…		…
570	PL_op = (OP *)&myop;	970	PL_op = (OP *)&myop;
571	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	971	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
572	SPAGAIN;	972	SPAGAIN;
573	}	973	}
574		974
		975	/*
		976	* this is a _very_ stripped down perl interpreter ;)
		977	*/
575	static void	978	static void
576	coro_run (void *arg)	979	cctx_run (void *arg)
577	{	980	{
		981	dTHX;
		982
578	/* coro_run is the alternative tail of transfer(), so unlock here. */	983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	984	UNLOCK;
580		985
581	/*	986	/* we now skip the entersub that lead to transfer() */
582	* this is a _very_ stripped down perl interpreter ;)	987	PL_op = PL_op->op_next;
583	*/
584	PL_top_env = &PL_start_env;
585		988
586	/* inject call to cctx_init */	989	/* inject a fake subroutine call to cctx_init */
587	prepare_cctx ((coro_cctx *)arg);	990	cctx_prepare (aTHX_ (coro_cctx *)arg);
588		991
589	/* somebody will hit me for both perl_run and PL_restartop */	992	/* somebody or something will hit me for both perl_run and PL_restartop */
590	PL_restartop = PL_op;	993	PL_restartop = PL_op;
591	perl_run (PL_curinterp);	994	perl_run (PL_curinterp);
592		995
593	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	996	/*
594	abort ();	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
		1002	*/
		1003	PL_top_env = main_top_env;
		1004	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
595	}	1005	}
596		1006
597	static coro_cctx *	1007	static coro_cctx *
598	cctx_new ()	1008	cctx_new ()
599	{	1009	{
600	coro_cctx *cctx;	1010	coro_cctx *cctx;
		1011	void *stack_start;
		1012	size_t stack_size;
601		1013
602	++cctx_count;	1014	++cctx_count;
603		1015
604	Newz (0, cctx, 1, coro_cctx);	1016	Newz (0, cctx, 1, coro_cctx);
605		1017
606	#if HAVE_MMAP	1018	#if HAVE_MMAP
607
608	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1019	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
609	/* mmap supposedly does allocate-on-write for us */	1020	/* mmap supposedly does allocate-on-write for us */
610	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);
611		1022
612	if (cctx->sptr == (void *)-1)	1023	if (cctx->sptr != (void *)-1)
613	{
614	perror ("FATAL: unable to mmap stack for coroutine");
615	_exit (EXIT_FAILURE);
616	}	1024	{
617
618	# if STACKGUARD	1025	# if CORO_STACKGUARD
619	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1026	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
620	# 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);
621		1037
622	#else
623
624	cctx->ssize = STACKSIZE * (long)sizeof (long);
625	New (0, cctx->sptr, STACKSIZE, long);
626
627	if (!cctx->sptr)	1038	if (!cctx->sptr)
628	{	1039	{
629	perror ("FATAL: unable to malloc stack for coroutine");	1040	perror ("FATAL: unable to allocate stack for coroutine");
630	_exit (EXIT_FAILURE);	1041	_exit (EXIT_FAILURE);
631	}	1042	}
632		1043
633	#endif	1044	stack_start = cctx->sptr;
		1045	stack_size = cctx->ssize;
		1046	}
634		1047
635	#if USE_VALGRIND	1048	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
636	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1049	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
637	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
638	cctx->ssize + (char *)cctx->sptr
639	);
640	#endif
641
642	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
643		1050
644	return cctx;	1051	return cctx;
645	}	1052	}
646		1053
647	static void	1054	static void
…		…
650	if (!cctx)	1057	if (!cctx)
651	return;	1058	return;
652		1059
653	--cctx_count;	1060	--cctx_count;
654		1061
655	#if USE_VALGRIND	1062	#if CORO_USE_VALGRIND
656	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
657	#endif	1064	#endif
658		1065
659	#if HAVE_MMAP	1066	#if HAVE_MMAP
		1067	if (cctx->flags & CC_MAPPED)
660	munmap (cctx->sptr, cctx->ssize);	1068	munmap (cctx->sptr, cctx->ssize);
661	#else	1069	else
		1070	#endif
662	Safefree (cctx->sptr);	1071	Safefree (cctx->sptr);
663	#endif
664		1072
665	Safefree (cctx);	1073	Safefree (cctx);
666	}	1074	}
667		1075
		1076	/* wether this cctx should be destructed */
		1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1078
668	static coro_cctx *	1079	static coro_cctx *
669	cctx_get ()	1080	cctx_get (pTHX)
670	{	1081	{
671	coro_cctx *cctx;	1082	while (expect_true (cctx_first))
672
673	if (cctx_first)
674	{	1083	{
675	cctx = cctx_first;	1084	coro_cctx *cctx = cctx_first;
676	cctx_first = cctx->next;	1085	cctx_first = cctx->next;
677	--cctx_idle;	1086	--cctx_idle;
678	}	1087
679	else	1088	if (expect_true (!CCTX_EXPIRED (cctx)))
680	{	1089	return cctx;
681	cctx = cctx_new ();	1090
682	PL_op = PL_op->op_next;	1091	cctx_destroy (cctx);
683	}	1092	}
684		1093
685	return cctx;	1094	return cctx_new ();
686	}	1095	}
687		1096
688	static void	1097	static void
689	cctx_put (coro_cctx *cctx)	1098	cctx_put (coro_cctx *cctx)
690	{	1099	{
691	/* free another cctx if overlimit */	1100	/* free another cctx if overlimit */
692	if (cctx_idle >= MAX_IDLE_CCTX)	1101	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
693	{	1102	{
694	coro_cctx *first = cctx_first;	1103	coro_cctx *first = cctx_first;
695	cctx_first = first->next;	1104	cctx_first = first->next;
696	--cctx_idle;	1105	--cctx_idle;
697		1106
698	assert (!first->inuse);
699	cctx_destroy (first);	1107	cctx_destroy (first);
700	}	1108	}
701		1109
702	++cctx_idle;	1110	++cctx_idle;
703	cctx->next = cctx_first;	1111	cctx->next = cctx_first;
704	cctx_first = cctx;	1112	cctx_first = cctx;
705	}	1113	}
706		1114
707	/* 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 */
708	static void NOINLINE	1143	static void NOINLINE
709	transfer (struct coro *prev, struct coro *next)	1144	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
710	{	1145	{
711	dSTACKLEVEL;	1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
712		1148
713	/* sometimes transfer is only called to set idle_sp */	1149	/* sometimes transfer is only called to set idle_sp */
714	if (!next)	1150	if (expect_false (!next))
715	{	1151	{
716	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
717	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */	1153	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
718	}	1154	}
719	else if (prev != next)	1155	else if (expect_true (prev != next))
720	{	1156	{
721	coro_cctx *prev__cctx;	1157	coro_cctx *prev__cctx;
722		1158
723	if (prev->flags & CF_NEW)	1159	if (expect_false (prev->flags & CF_NEW))
724	{	1160	{
725	/* create a new empty context */	1161	/* create a new empty context */
726	Newz (0, prev->cctx, 1, coro_cctx);	1162	Newz (0, prev->cctx, 1, coro_cctx);
727	prev->cctx->inuse = 1;
728	prev->flags &= ~CF_NEW;	1163	prev->flags &= ~CF_NEW;
729	prev->flags |= CF_RUNNING;	1164	prev->flags |= CF_RUNNING;
730	}	1165	}
731		1166
732	/*TODO: must not croak here */
733	if (!prev->flags & CF_RUNNING)
734	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
735
736	if (next->flags & CF_RUNNING)
737	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
738
739	prev->flags &= ~CF_RUNNING;	1167	prev->flags &= ~CF_RUNNING;
740	next->flags |= CF_RUNNING;	1168	next->flags |= CF_RUNNING;
741		1169
742	LOCK;	1170	LOCK;
743		1171
		1172	/* first get rid of the old state */
		1173	save_perl (aTHX_ prev);
		1174
744	if (next->flags & CF_NEW)	1175	if (expect_false (next->flags & CF_NEW))
745	{	1176	{
746	/* need to start coroutine */	1177	/* need to start coroutine */
747	next->flags &= ~CF_NEW;	1178	next->flags &= ~CF_NEW;
748	/* first get rid of the old state */
749	save_perl (prev);
750	/* setup coroutine call */	1179	/* setup coroutine call */
751	setup_coro (next);	1180	coro_setup (aTHX_ next);
752	/* need a new stack */
753	assert (!next->cctx);
754	}	1181	}
755	else	1182	else
756	{
757	/* coroutine already started */
758	save_perl (prev);
759	load_perl (next);	1183	load_perl (aTHX_ next);
760	}
761		1184
762	prev__cctx = prev->cctx;	1185	prev__cctx = prev->cctx;
763		1186
764	/* possibly "free" the cctx */	1187	/* possibly "free" the cctx */
		1188	if (expect_true (
765	if (prev__cctx->idle_sp == STACKLEVEL)	1189	prev__cctx->idle_sp == STACKLEVEL
		1190	&& !(prev__cctx->flags & CC_TRACE)
		1191	&& !force_cctx
		1192	))
766	{	1193	{
767	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1194	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
768	assert (PL_top_env == prev__cctx->top_env);	1195	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
769		1196
770	prev->cctx = 0;	1197	prev->cctx = 0;
771		1198
		1199	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1200	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1201	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1202	if (!next->cctx)
		1203	next->cctx = cctx_get (aTHX);
		1204
772	cctx_put (prev__cctx);	1205	cctx_put (prev__cctx);
773	prev__cctx->inuse = 0;
774	}	1206	}
775		1207
		1208	++next->usecount;
		1209
776	if (!next->cctx)	1210	if (expect_true (!next->cctx))
777	{
778	next->cctx = cctx_get ();	1211	next->cctx = cctx_get (aTHX);
779	assert (!next->cctx->inuse);
780	next->cctx->inuse = 1;
781	}
782		1212
		1213	has_throw = !!next->throw;
		1214
783	if (prev__cctx != next->cctx)	1215	if (expect_false (prev__cctx != next->cctx))
784	{	1216	{
785	prev__cctx->top_env = PL_top_env;	1217	prev__cctx->top_env = PL_top_env;
786	PL_top_env = next->cctx->top_env;	1218	PL_top_env = next->cctx->top_env;
787	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1219	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
788	}	1220	}
789		1221
790	free_coro_mortal ();	1222	free_coro_mortal (aTHX);
791
792	UNLOCK;	1223	UNLOCK;
		1224
		1225	if (expect_false (has_throw))
		1226	{
		1227	struct coro *coro = SvSTATE (coro_current);
		1228
		1229	if (coro->throw)
		1230	{
		1231	SV *exception = coro->throw;
		1232	coro->throw = 0;
		1233	sv_setsv (ERRSV, exception);
		1234	croak (0);
		1235	}
		1236	}
793	}	1237	}
794	}	1238	}
795		1239
796	struct transfer_args	1240	struct transfer_args
797	{	1241	{
798	struct coro *prev, *next;	1242	struct coro *prev, *next;
799	};	1243	};
800		1244
		1245	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
801	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1246	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
802		1247
		1248	/** high level stuff ********************************************************/
		1249
803	static void	1250	static int
804	coro_state_destroy (struct coro *coro)	1251	coro_state_destroy (pTHX_ struct coro *coro)
805	{	1252	{
806	if (coro->refcnt--)	1253	if (coro->flags & CF_DESTROYED)
807	return;	1254	return 0;
		1255
		1256	coro->flags |= CF_DESTROYED;
		1257
		1258	if (coro->flags & CF_READY)
		1259	{
		1260	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1261	/* alternative: look through all ready queues and remove the coro */
		1262	LOCK;
		1263	--coro_nready;
		1264	UNLOCK;
		1265	}
		1266	else
		1267	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
808		1268
809	if (coro->mainstack && coro->mainstack != main_mainstack)	1269	if (coro->mainstack && coro->mainstack != main_mainstack)
810	{	1270	{
811	struct coro temp;	1271	struct coro temp;
812	Zero (&temp, 1, struct coro);
813	temp.save = CORO_SAVE_ALL;
814		1272
815	if (coro->flags & CF_RUNNING)	1273	if (coro->flags & CF_RUNNING)
816	croak ("FATAL: tried to destroy currently running coroutine");	1274	croak ("FATAL: tried to destroy currently running coroutine");
817		1275
818	save_perl (&temp);	1276	save_perl (aTHX_ &temp);
819	load_perl (coro);	1277	load_perl (aTHX_ coro);
820		1278
821	coro_destroy_stacks ();	1279	coro_destroy (aTHX_ coro);
822		1280
823	load_perl (&temp); /* this will get rid of defsv etc.. */	1281	load_perl (aTHX_ &temp);
824		1282
825	coro->mainstack = 0;	1283	coro->slot = 0;
826	}	1284	}
827		1285
828	cctx_destroy (coro->cctx);	1286	cctx_destroy (coro->cctx);
829	SvREFCNT_dec (coro->args);	1287	SvREFCNT_dec (coro->args);
830	Safefree (coro);	1288
		1289	if (coro->next) coro->next->prev = coro->prev;
		1290	if (coro->prev) coro->prev->next = coro->next;
		1291	if (coro == coro_first) coro_first = coro->next;
		1292
		1293	return 1;
831	}	1294	}
832		1295
833	static int	1296	static int
834	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1297	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
835	{	1298	{
836	struct coro *coro = (struct coro *)mg->mg_ptr;	1299	struct coro *coro = (struct coro *)mg->mg_ptr;
837	mg->mg_ptr = 0;	1300	mg->mg_ptr = 0;
838		1301
		1302	coro->hv = 0;
		1303
		1304	if (--coro->refcnt < 0)
		1305	{
839	coro_state_destroy (coro);	1306	coro_state_destroy (aTHX_ coro);
		1307	Safefree (coro);
		1308	}
840		1309
841	return 0;	1310	return 0;
842	}	1311	}
843		1312
844	static int	1313	static int
…		…
851	return 0;	1320	return 0;
852	}	1321	}
853		1322
854	static MGVTBL coro_state_vtbl = {	1323	static MGVTBL coro_state_vtbl = {
855	0, 0, 0, 0,	1324	0, 0, 0, 0,
856	coro_state_clear,	1325	coro_state_free,
857	0,	1326	0,
858	#ifdef MGf_DUP	1327	#ifdef MGf_DUP
859	coro_state_dup,	1328	coro_state_dup,
860	#else	1329	#else
861	# define MGf_DUP 0	1330	# define MGf_DUP 0
862	#endif	1331	#endif
863	};	1332	};
864		1333
865	static struct coro *
866	SvSTATE (SV *coro)
867	{
868	HV *stash;
869	MAGIC *mg;
870
871	if (SvROK (coro))
872	coro = SvRV (coro);
873
874	stash = SvSTASH (coro);
875	if (stash != coro_stash && stash != coro_state_stash)
876	{
877	/* very slow, but rare, check */
878	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
879	croak ("Coro::State object required");
880	}
881
882	mg = SvMAGIC (coro);
883	assert (mg->mg_type == PERL_MAGIC_ext);
884	return (struct coro *)mg->mg_ptr;
885	}
886
887	static void	1334	static void
888	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1335	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
889	{	1336	{
890	ta->prev = SvSTATE (prev_sv);	1337	ta->prev = SvSTATE (prev_sv);
891	ta->next = SvSTATE (next_sv);	1338	ta->next = SvSTATE (next_sv);
		1339	TRANSFER_CHECK (*ta);
892	}	1340	}
893		1341
894	static void	1342	static void
895	api_transfer (SV *prev_sv, SV *next_sv)	1343	api_transfer (SV *prev_sv, SV *next_sv)
896	{	1344	{
		1345	dTHX;
897	struct transfer_args ta;	1346	struct transfer_args ta;
898		1347
899	prepare_transfer (&ta, prev_sv, next_sv);	1348	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900	TRANSFER (ta);	1349	TRANSFER (ta, 1);
901	}
902
903	static int
904	api_save (SV *coro_sv, int new_save)
905	{
906	struct coro *coro = SvSTATE (coro_sv);
907	int old_save = coro->save;
908
909	if (new_save >= 0)
910	coro->save = new_save;
911
912	return old_save;
913	}	1350	}
914		1351
915	/** Coro ********************************************************************/	1352	/** Coro ********************************************************************/
916		1353
917	#define PRIO_MAX 3
918	#define PRIO_HIGH 1
919	#define PRIO_NORMAL 0
920	#define PRIO_LOW -1
921	#define PRIO_IDLE -3
922	#define PRIO_MIN -4
923
924	/* for Coro.pm */
925	static SV *coro_current;
926	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
927	static int coro_nready;
928
929	static void	1354	static void
930	coro_enq (SV *coro_sv)	1355	coro_enq (pTHX_ SV *coro_sv)
931	{	1356	{
932	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1357	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
933	coro_nready++;
934	}	1358	}
935		1359
936	static SV *	1360	static SV *
937	coro_deq (int min_prio)	1361	coro_deq (pTHX)
938	{	1362	{
939	int prio = PRIO_MAX - PRIO_MIN;	1363	int prio;
940		1364
941	min_prio -= PRIO_MIN;
942	if (min_prio < 0)
943	min_prio = 0;
944
945	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1365	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
946	if (AvFILLp (coro_ready [prio]) >= 0)	1366	if (AvFILLp (coro_ready [prio]) >= 0)
947	{
948	coro_nready--;
949	return av_shift (coro_ready [prio]);	1367	return av_shift (coro_ready [prio]);
950	}
951		1368
952	return 0;	1369	return 0;
953	}	1370	}
954		1371
955	static int	1372	static int
956	api_ready (SV *coro_sv)	1373	api_ready (SV *coro_sv)
957	{	1374	{
		1375	dTHX;
958	struct coro *coro;	1376	struct coro *coro;
959		1377
960	if (SvROK (coro_sv))	1378	if (SvROK (coro_sv))
961	coro_sv = SvRV (coro_sv);	1379	coro_sv = SvRV (coro_sv);
962		1380
963	coro = SvSTATE (coro_sv);	1381	coro = SvSTATE (coro_sv);
964		1382
965	if (coro->flags & CF_READY)	1383	if (coro->flags & CF_READY)
966	return 0;	1384	return 0;
967		1385
968	#if 0 /* this is actually harmless */
969	if (coro->flags & CF_RUNNING)
970	croak ("Coro::ready called on currently running coroutine");
971	#endif
972
973	coro->flags |= CF_READY;	1386	coro->flags |= CF_READY;
974		1387
975	LOCK;	1388	LOCK;
976	coro_enq (SvREFCNT_inc (coro_sv));	1389	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1390	++coro_nready;
977	UNLOCK;	1391	UNLOCK;
978		1392
979	return 1;	1393	return 1;
980	}	1394	}
981		1395
982	static int	1396	static int
983	api_is_ready (SV *coro_sv)	1397	api_is_ready (SV *coro_sv)
984	{	1398	{
		1399	dTHX;
985	return !!SvSTATE (coro_sv)->flags & CF_READY;	1400	return !!(SvSTATE (coro_sv)->flags & CF_READY);
986	}	1401	}
987		1402
988	static void	1403	static void
989	prepare_schedule (struct transfer_args *ta)	1404	prepare_schedule (pTHX_ struct transfer_args *ta)
990	{	1405	{
991	SV *prev, *next;	1406	SV *prev_sv, *next_sv;
992		1407
993	for (;;)	1408	for (;;)
994	{	1409	{
995	LOCK;	1410	LOCK;
996	next = coro_deq (PRIO_MIN);	1411	next_sv = coro_deq (aTHX);
		1412
		1413	/* nothing to schedule: call the idle handler */
		1414	if (expect_false (!next_sv))
		1415	{
		1416	dSP;
		1417	UNLOCK;
		1418
		1419	ENTER;
		1420	SAVETMPS;
		1421
		1422	PUSHMARK (SP);
		1423	PUTBACK;
		1424	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1425	SPAGAIN;
		1426
		1427	FREETMPS;
		1428	LEAVE;
		1429	continue;
		1430	}
		1431
		1432	ta->next = SvSTATE (next_sv);
		1433
		1434	/* cannot transfer to destroyed coros, skip and look for next */
		1435	if (expect_false (ta->next->flags & CF_DESTROYED))
		1436	{
		1437	UNLOCK;
		1438	SvREFCNT_dec (next_sv);
		1439	/* coro_nready is already taken care of by destroy */
		1440	continue;
		1441	}
		1442
		1443	--coro_nready;
997	UNLOCK;	1444	UNLOCK;
998
999	if (next)
1000	break;	1445	break;
1001
1002	{
1003	dSP;
1004
1005	ENTER;
1006	SAVETMPS;
1007
1008	PUSHMARK (SP);
1009	PUTBACK;
1010	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1011
1012	FREETMPS;
1013	LEAVE;
1014	}	1446	}
1015	}
1016
1017	prev = SvRV (coro_current);
1018	SvRV_set (coro_current, next);
1019		1447
1020	/* free this only after the transfer */	1448	/* free this only after the transfer */
1021	LOCK;	1449	prev_sv = SvRV (coro_current);
1022	free_coro_mortal ();
1023	UNLOCK;
1024	coro_mortal = prev;
1025
1026	assert (!SvROK(prev));//D
1027	assert (!SvROK(next));//D
1028
1029	ta->prev = SvSTATE (prev);	1450	ta->prev = SvSTATE (prev_sv);
1030	ta->next = SvSTATE (next);	1451	TRANSFER_CHECK (*ta);
1031
1032	assert (ta->next->flags & CF_READY);	1452	assert (ta->next->flags & CF_READY);
1033	ta->next->flags &= ~CF_READY;	1453	ta->next->flags &= ~CF_READY;
		1454	SvRV_set (coro_current, next_sv);
		1455
		1456	LOCK;
		1457	free_coro_mortal (aTHX);
		1458	coro_mortal = prev_sv;
		1459	UNLOCK;
1034	}	1460	}
1035		1461
1036	static void	1462	static void
1037	prepare_cede (struct transfer_args *ta)	1463	prepare_cede (pTHX_ struct transfer_args *ta)
1038	{	1464	{
1039	api_ready (coro_current);	1465	api_ready (coro_current);
1040
1041	prepare_schedule (ta);	1466	prepare_schedule (aTHX_ ta);
		1467	}
		1468
		1469	static int
		1470	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1471	{
		1472	if (coro_nready)
		1473	{
		1474	SV *prev = SvRV (coro_current);
		1475	prepare_schedule (aTHX_ ta);
		1476	api_ready (prev);
		1477	return 1;
		1478	}
		1479	else
		1480	return 0;
1042	}	1481	}
1043		1482
1044	static void	1483	static void
1045	api_schedule (void)	1484	api_schedule (void)
1046	{	1485	{
		1486	dTHX;
1047	struct transfer_args ta;	1487	struct transfer_args ta;
1048		1488
1049	prepare_schedule (&ta);	1489	prepare_schedule (aTHX_ &ta);
1050	TRANSFER (ta);	1490	TRANSFER (ta, 1);
		1491	}
		1492
		1493	static int
		1494	api_cede (void)
		1495	{
		1496	dTHX;
		1497	struct transfer_args ta;
		1498
		1499	prepare_cede (aTHX_ &ta);
		1500
		1501	if (expect_true (ta.prev != ta.next))
		1502	{
		1503	TRANSFER (ta, 1);
		1504	return 1;
		1505	}
		1506	else
		1507	return 0;
		1508	}
		1509
		1510	static int
		1511	api_cede_notself (void)
		1512	{
		1513	dTHX;
		1514	struct transfer_args ta;
		1515
		1516	if (prepare_cede_notself (aTHX_ &ta))
		1517	{
		1518	TRANSFER (ta, 1);
		1519	return 1;
		1520	}
		1521	else
		1522	return 0;
1051	}	1523	}
1052		1524
1053	static void	1525	static void
1054	api_cede (void)	1526	api_trace (SV *coro_sv, int flags)
1055	{	1527	{
1056	struct transfer_args ta;	1528	dTHX;
		1529	struct coro *coro = SvSTATE (coro_sv);
1057		1530
1058	prepare_cede (&ta);	1531	if (flags & CC_TRACE)
1059	TRANSFER (ta);	1532	{
1060	}	1533	if (!coro->cctx)
		1534	coro->cctx = cctx_new ();
		1535	else if (!(coro->cctx->flags & CC_TRACE))
		1536	croak ("cannot enable tracing on coroutine with custom stack");
1061		1537
		1538	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1539	}
		1540	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1541	{
		1542	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1543
		1544	if (coro->flags & CF_RUNNING)
		1545	PL_runops = RUNOPS_DEFAULT;
		1546	else
		1547	coro->slot->runops = RUNOPS_DEFAULT;
		1548	}
		1549	}
		1550
1062	MODULE = Coro::State PACKAGE = Coro::State	1551	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1063		1552
1064	PROTOTYPES: DISABLE	1553	PROTOTYPES: DISABLE
1065		1554
1066	BOOT:	1555	BOOT:
1067	{	1556	{
1068	#ifdef USE_ITHREADS	1557	#ifdef USE_ITHREADS
1069	MUTEX_INIT (&coro_mutex);	1558	MUTEX_INIT (&coro_mutex);
1070	#endif	1559	#endif
1071	BOOT_PAGESIZE;	1560	BOOT_PAGESIZE;
1072		1561
		1562	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1563	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1564
		1565	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1566	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1567	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1568	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1569
		1570	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1571	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1572	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1573
1073	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1574	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1074		1575
		1576	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1577	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1075	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1578	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1076	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1077	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1078	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1079	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1579	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1080		1580
1081	main_mainstack = PL_mainstack;	1581	main_mainstack = PL_mainstack;
		1582	main_top_env = PL_top_env;
		1583
		1584	while (main_top_env->je_prev)
		1585	main_top_env = main_top_env->je_prev;
1082		1586
1083	coroapi.ver = CORO_API_VERSION;	1587	coroapi.ver = CORO_API_VERSION;
		1588	coroapi.rev = CORO_API_REVISION;
1084	coroapi.transfer = api_transfer;	1589	coroapi.transfer = api_transfer;
1085		1590
1086	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1591	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1087	}	1592	}
1088		1593
1089	SV *	1594	SV *
1090	new (char *klass, ...)	1595	new (char *klass, ...)
1091	CODE:	1596	CODE:
1092	{	1597	{
1093	struct coro *coro;	1598	struct coro *coro;
		1599	MAGIC *mg;
1094	HV *hv;	1600	HV *hv;
1095	int i;	1601	int i;
1096		1602
1097	Newz (0, coro, 1, struct coro);	1603	Newz (0, coro, 1, struct coro);
1098	coro->args = newAV ();	1604	coro->args = newAV ();
1099	coro->save = CORO_SAVE_ALL;
1100	coro->flags = CF_NEW;	1605	coro->flags = CF_NEW;
1101		1606
		1607	if (coro_first) coro_first->prev = coro;
		1608	coro->next = coro_first;
		1609	coro_first = coro;
		1610
1102	hv = newHV ();	1611	coro->hv = hv = newHV ();
1103	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1612	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1613	mg->mg_flags |= MGf_DUP;
1104	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1614	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1105		1615
		1616	av_extend (coro->args, items - 1);
1106	for (i = 1; i < items; i++)	1617	for (i = 1; i < items; i++)
1107	av_push (coro->args, newSVsv (ST (i)));	1618	av_push (coro->args, newSVsv (ST (i)));
1108	}	1619	}
1109	OUTPUT:	1620	OUTPUT:
1110	RETVAL	1621	RETVAL
1111		1622
1112	int	1623	# these not obviously related functions are all rolled into the same xs
1113	save (SV *coro, int new_save = -1)	1624	# function to increase chances that they all will call transfer with the same
1114	CODE:	1625	# stack offset
1115	RETVAL = api_save (coro, new_save);
1116	OUTPUT:
1117	RETVAL
1118
1119	void	1626	void
1120	_set_stacklevel (...)	1627	_set_stacklevel (...)
1121	ALIAS:	1628	ALIAS:
1122	Coro::State::transfer = 1	1629	Coro::State::transfer = 1
1123	Coro::schedule = 2	1630	Coro::schedule = 2
1124	Coro::cede = 3	1631	Coro::cede = 3
		1632	Coro::cede_notself = 4
1125	CODE:	1633	CODE:
1126	{	1634	{
1127	struct transfer_args ta;	1635	struct transfer_args ta;
1128		1636
		1637	PUTBACK;
1129	switch (ix)	1638	switch (ix)
1130	{	1639	{
1131	case 0:	1640	case 0:
1132	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1641	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1133	ta.next = 0;	1642	ta.next = 0;
…		…
1135		1644
1136	case 1:	1645	case 1:
1137	if (items != 2)	1646	if (items != 2)
1138	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1647	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1139		1648
1140	prepare_transfer (&ta, ST (0), ST (1));	1649	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1141	break;	1650	break;
1142		1651
1143	case 2:	1652	case 2:
1144	prepare_schedule (&ta);	1653	prepare_schedule (aTHX_ &ta);
1145	break;	1654	break;
1146		1655
1147	case 3:	1656	case 3:
1148	prepare_cede (&ta);	1657	prepare_cede (aTHX_ &ta);
		1658	break;
		1659
		1660	case 4:
		1661	if (!prepare_cede_notself (aTHX_ &ta))
		1662	XSRETURN_EMPTY;
		1663
1149	break;	1664	break;
1150	}	1665	}
		1666	SPAGAIN;
1151		1667
		1668	BARRIER;
		1669	PUTBACK;
1152	TRANSFER (ta);	1670	TRANSFER (ta, 0);
		1671	SPAGAIN; /* might be the sp of a different coroutine now */
		1672	/* be extra careful not to ever do anything after TRANSFER */
1153	}	1673	}
1154		1674
1155	void	1675	bool
1156	_clone_state_from (SV *dst, SV *src)	1676	_destroy (SV *coro_sv)
1157	CODE:	1677	CODE:
1158	{	1678	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1159	struct coro *coro_src = SvSTATE (src);	1679	OUTPUT:
1160		1680	RETVAL
1161	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1162
1163	++coro_src->refcnt;
1164	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1165	}
1166		1681
1167	void	1682	void
1168	_exit (code)	1683	_exit (code)
1169	int code	1684	int code
1170	PROTOTYPE: $	1685	PROTOTYPE: $
1171	CODE:	1686	CODE:
1172	_exit (code);	1687	_exit (code);
1173		1688
1174	int	1689	int
		1690	cctx_stacksize (int new_stacksize = 0)
		1691	CODE:
		1692	RETVAL = coro_stacksize;
		1693	if (new_stacksize)
		1694	coro_stacksize = new_stacksize;
		1695	OUTPUT:
		1696	RETVAL
		1697
		1698	int
1175	cctx_count ()	1699	cctx_count ()
1176	CODE:	1700	CODE:
1177	RETVAL = cctx_count;	1701	RETVAL = cctx_count;
1178	OUTPUT:	1702	OUTPUT:
1179	RETVAL	1703	RETVAL
…		…
1183	CODE:	1707	CODE:
1184	RETVAL = cctx_idle;	1708	RETVAL = cctx_idle;
1185	OUTPUT:	1709	OUTPUT:
1186	RETVAL	1710	RETVAL
1187		1711
		1712	void
		1713	list ()
		1714	PPCODE:
		1715	{
		1716	struct coro *coro;
		1717	for (coro = coro_first; coro; coro = coro->next)
		1718	if (coro->hv)
		1719	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1720	}
		1721
		1722	void
		1723	call (Coro::State coro, SV *coderef)
		1724	ALIAS:
		1725	eval = 1
		1726	CODE:
		1727	{
		1728	if (coro->mainstack)
		1729	{
		1730	struct coro temp;
		1731
		1732	if (!(coro->flags & CF_RUNNING))
		1733	{
		1734	PUTBACK;
		1735	save_perl (aTHX_ &temp);
		1736	load_perl (aTHX_ coro);
		1737	}
		1738
		1739	{
		1740	dSP;
		1741	ENTER;
		1742	SAVETMPS;
		1743	PUTBACK;
		1744	PUSHSTACK;
		1745	PUSHMARK (SP);
		1746
		1747	if (ix)
		1748	eval_sv (coderef, 0);
		1749	else
		1750	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1751
		1752	POPSTACK;
		1753	SPAGAIN;
		1754	FREETMPS;
		1755	LEAVE;
		1756	PUTBACK;
		1757	}
		1758
		1759	if (!(coro->flags & CF_RUNNING))
		1760	{
		1761	save_perl (aTHX_ coro);
		1762	load_perl (aTHX_ &temp);
		1763	SPAGAIN;
		1764	}
		1765	}
		1766	}
		1767
		1768	SV *
		1769	is_ready (Coro::State coro)
		1770	PROTOTYPE: $
		1771	ALIAS:
		1772	is_ready = CF_READY
		1773	is_running = CF_RUNNING
		1774	is_new = CF_NEW
		1775	is_destroyed = CF_DESTROYED
		1776	CODE:
		1777	RETVAL = boolSV (coro->flags & ix);
		1778	OUTPUT:
		1779	RETVAL
		1780
		1781	void
		1782	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1783
		1784	SV *
		1785	has_stack (Coro::State coro)
		1786	PROTOTYPE: $
		1787	CODE:
		1788	RETVAL = boolSV (!!coro->cctx);
		1789	OUTPUT:
		1790	RETVAL
		1791
		1792	int
		1793	is_traced (Coro::State coro)
		1794	PROTOTYPE: $
		1795	CODE:
		1796	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1797	OUTPUT:
		1798	RETVAL
		1799
		1800	IV
		1801	rss (Coro::State coro)
		1802	PROTOTYPE: $
		1803	ALIAS:
		1804	usecount = 1
		1805	CODE:
		1806	switch (ix)
		1807	{
		1808	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1809	case 1: RETVAL = coro->usecount; break;
		1810	}
		1811	OUTPUT:
		1812	RETVAL
		1813
		1814	void
		1815	force_cctx ()
		1816	CODE:
		1817	struct coro *coro = SvSTATE (coro_current);
		1818	coro->cctx->idle_sp = 0;
		1819
1188	MODULE = Coro::State PACKAGE = Coro	1820	MODULE = Coro::State PACKAGE = Coro
1189		1821
1190	BOOT:	1822	BOOT:
1191	{	1823	{
1192	int i;	1824	int i;
1193		1825
		1826	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1827	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1828	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1829
		1830	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1831	SvREADONLY_on (coro_current);
		1832
1194	coro_stash = gv_stashpv ("Coro", TRUE);	1833	coro_stash = gv_stashpv ("Coro", TRUE);
1195		1834
1196	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1835	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1197	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1836	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1198	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1837	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1199	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1838	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1200	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1839	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1201	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1840	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1202		1841
1203	coro_current = get_sv ("Coro::current", FALSE);
1204	SvREADONLY_on (coro_current);
1205
1206	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1842	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1207	coro_ready[i] = newAV ();	1843	coro_ready[i] = newAV ();
1208		1844
1209	{	1845	{
1210	SV *sv = perl_get_sv("Coro::API", 1);	1846	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1847	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1211		1848
1212	coroapi.schedule = api_schedule;	1849	coroapi.schedule = api_schedule;
1213	coroapi.save = api_save;
1214	coroapi.cede = api_cede;	1850	coroapi.cede = api_cede;
		1851	coroapi.cede_notself = api_cede_notself;
1215	coroapi.ready = api_ready;	1852	coroapi.ready = api_ready;
1216	coroapi.is_ready = api_is_ready;	1853	coroapi.is_ready = api_is_ready;
1217	coroapi.nready = &coro_nready;	1854	coroapi.nready = &coro_nready;
1218	coroapi.current = coro_current;	1855	coroapi.current = coro_current;
1219		1856
1220	GCoroAPI = &coroapi;	1857	GCoroAPI = &coroapi;
1221	sv_setiv (sv, (IV)&coroapi);	1858	sv_setiv (sv, (IV)&coroapi);
1222	SvREADONLY_on (sv);	1859	SvREADONLY_on (sv);
1223	}	1860	}
…		…
1239	RETVAL = coro->prio;	1876	RETVAL = coro->prio;
1240		1877
1241	if (items > 1)	1878	if (items > 1)
1242	{	1879	{
1243	if (ix)	1880	if (ix)
1244	newprio += coro->prio;	1881	newprio = coro->prio - newprio;
1245		1882
1246	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1883	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1247	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1884	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1248		1885
1249	coro->prio = newprio;	1886	coro->prio = newprio;
1250	}	1887	}
1251	}	1888	}
		1889	OUTPUT:
		1890	RETVAL
1252		1891
1253	SV *	1892	SV *
1254	ready (SV *self)	1893	ready (SV *self)
1255	PROTOTYPE: $	1894	PROTOTYPE: $
1256	CODE:	1895	CODE:
1257	RETVAL = boolSV (api_ready (self));	1896	RETVAL = boolSV (api_ready (self));
1258	OUTPUT:	1897	OUTPUT:
1259	RETVAL	1898	RETVAL
1260		1899
1261	SV *
1262	is_ready (SV *self)
1263	PROTOTYPE: $
1264	CODE:
1265	RETVAL = boolSV (api_is_ready (self));
1266	OUTPUT:
1267	RETVAL
1268
1269	int	1900	int
1270	nready (...)	1901	nready (...)
1271	PROTOTYPE:	1902	PROTOTYPE:
1272	CODE:	1903	CODE:
1273	RETVAL = coro_nready;	1904	RETVAL = coro_nready;
1274	OUTPUT:	1905	OUTPUT:
1275	RETVAL	1906	RETVAL
1276		1907
		1908	void
		1909	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1910	PROTOTYPE: $;$
		1911	CODE:
		1912	SvREFCNT_dec (self->throw);
		1913	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1914
		1915	void
		1916	swap_defsv (Coro::State self)
		1917	PROTOTYPE: $
		1918	ALIAS:
		1919	swap_defav = 1
		1920	CODE:
		1921	if (!self->slot)
		1922	croak ("cannot swap state with coroutine that has no saved state");
		1923	else
		1924	{
		1925	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1926	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1927
		1928	SV *tmp = *src; *src = *dst; *dst = tmp;
		1929	}
		1930
		1931	# for async_pool speedup
		1932	void
		1933	_pool_1 (SV *cb)
		1934	CODE:
		1935	{
		1936	struct coro *coro = SvSTATE (coro_current);
		1937	HV *hv = (HV *)SvRV (coro_current);
		1938	AV *defav = GvAV (PL_defgv);
		1939	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1940	AV *invoke_av;
		1941	int i, len;
		1942
		1943	if (!invoke)
		1944	{
		1945	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1946	croak ("\3async_pool terminate\2\n");
		1947	}
		1948
		1949	SvREFCNT_dec (coro->saved_deffh);
		1950	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1951
		1952	hv_store (hv, "desc", sizeof ("desc") - 1,
		1953	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1954
		1955	invoke_av = (AV *)SvRV (invoke);
		1956	len = av_len (invoke_av);
		1957
		1958	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1959
		1960	if (len > 0)
		1961	{
		1962	av_fill (defav, len - 1);
		1963	for (i = 0; i < len; ++i)
		1964	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1965	}
		1966
		1967	SvREFCNT_dec (invoke);
		1968	}
		1969
		1970	void
		1971	_pool_2 (SV *cb)
		1972	CODE:
		1973	{
		1974	struct coro *coro = SvSTATE (coro_current);
		1975
		1976	sv_setsv (cb, &PL_sv_undef);
		1977
		1978	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1979	coro->saved_deffh = 0;
		1980
		1981	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1982	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1983	{
		1984	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1985	croak ("\3async_pool terminate\2\n");
		1986	}
		1987
		1988	av_clear (GvAV (PL_defgv));
		1989	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1990	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1991
		1992	coro->prio = 0;
		1993
		1994	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1995	api_trace (coro_current, 0);
		1996
		1997	av_push (av_async_pool, newSVsv (coro_current));
		1998	}
		1999
		2000
1277	MODULE = Coro::State PACKAGE = Coro::AIO	2001	MODULE = Coro::State PACKAGE = Coro::AIO
1278		2002
1279	SV *	2003	SV *
1280	_get_state ()	2004	_get_state ()
1281	CODE:	2005	CODE:

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