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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs.
Revision 1.239 by root, Sat Jun 28 23:14:19 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	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	12	#include <stdio.h>
41	#include <errno.h>	13	#include <errno.h>
		14	#include <assert.h>
42		15
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	16	#ifdef WIN32
44	# undef STACKGUARD	17	# undef setjmp
45	#endif	18	# undef longjmp
46		19	# undef _exit
47	#ifndef STACKGUARD	20	# define setjmp _setjmp // deep magic, don't ask
48	# define STACKGUARD 0	21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
49	#endif	23	#endif
50		24
51	#ifdef HAVE_MMAP	25	#ifdef HAVE_MMAP
52	# include <unistd.h>	26	# include <unistd.h>
53	# include <sys/mman.h>	27	# include <sys/mman.h>
…		…
69	#else	43	#else
70	# define PAGESIZE 0	44	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	45	# define BOOT_PAGESIZE (void)0
72	#endif	46	#endif
73		47
74	/* The next macro should declare a variable stacklevel that contains and approximation	48	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	49	# include <valgrind/valgrind.h>
76	* and should be unique. */	50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
		53	#endif
		54
		55	/* the maximum number of idle cctx that will be pooled */
		56	#define MAX_IDLE_CCTX 8
		57
		58	#define PERL_VERSION_ATLEAST(a,b,c) \
		59	(PERL_REVISION > (a) \
		60	|| (PERL_REVISION == (a) \
		61	&& (PERL_VERSION > (b) \
		62	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		63
		64	#if !PERL_VERSION_ATLEAST (5,6,0)
		65	# ifndef PL_ppaddr
		66	# define PL_ppaddr ppaddr
		67	# endif
		68	# ifndef call_sv
		69	# define call_sv perl_call_sv
		70	# endif
		71	# ifndef get_sv
		72	# define get_sv perl_get_sv
		73	# endif
		74	# ifndef get_cv
		75	# define get_cv perl_get_cv
		76	# endif
		77	# ifndef IS_PADGV
		78	# define IS_PADGV(v) 0
		79	# endif
		80	# ifndef IS_PADCONST
		81	# define IS_PADCONST(v) 0
		82	# endif
		83	#endif
		84
		85	/* 5.8.8 */
		86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
		98	/* 5.8.7 */
		99	#ifndef SvRV_set
		100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
		102
		103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		104	# undef CORO_STACKGUARD
		105	#endif
		106
		107	#ifndef CORO_STACKGUARD
		108	# define CORO_STACKGUARD 0
		109	#endif
		110
		111	/* prefer perl internal functions over our own? */
		112	#ifndef CORO_PREFER_PERL_FUNCTIONS
		113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
		115
		116	/* The next macros try to return the current stack pointer, in an as
		117	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	118	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	119	#define STACKLEVEL ((void *)&stacklevel)
79		120
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		122
82	#if __GNUC__ >= 3	123	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
84	#else	127	#else
85	# define attribute(x)	128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
86	#endif	131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
87		135
88	#define NOINLINE attribute ((noinline))	136	#define NOINLINE attribute ((noinline))
89		137
90	#include "CoroAPI.h"	138	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		139
94	#ifdef USE_ITHREADS	140	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	141	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	144	#else
99	# define LOCK (void)0	145	# define LOCK (void)0
100	# define UNLOCK (void)0	146	# define UNLOCK (void)0
101	#endif	147	#endif
102		148
		149	/* helper storage struct for Coro::AIO */
		150	struct io_state
		151	{
		152	int errorno;
		153	I32 laststype;
		154	int laststatval;
		155	Stat_t statcache;
		156	};
		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	163	static volatile SV *coro_mortal; /* will be freed after next transfer */
		164
		165	static GV *irsgv; /* $/ */
		166	static GV *stdoutgv; /* *STDOUT */
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV *hv_sig; /* %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	/* Coro::AnyEvent */
		177	static SV *sv_activity;
107		178
108	static struct coro_cctx *cctx_first;	179	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	180	static int cctx_count, cctx_idle;
		181
		182	enum {
		183	CC_MAPPED = 0x01,
		184	CC_NOREUSE = 0x02, /* throw this away after tracing */
		185	CC_TRACE = 0x04,
		186	CC_TRACE_SUB = 0x08, /* trace sub calls */
		187	CC_TRACE_LINE = 0x10, /* trace each statement */
		188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		189	};
110		190
111	/* this is a structure representing a c-level coroutine */	191	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	192	typedef struct coro_cctx {
113	struct coro_cctx *next;	193	struct coro_cctx *next;
114		194
115	/* the stack */	195	/* the stack */
116	void *sptr;	196	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	197	size_t ssize;
118		198
119	/* cpu state */	199	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	200	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		201	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	202	JMPENV *top_env;
122	coro_context cctx;	203	coro_context cctx;
123		204
124	#if USE_VALGRIND	205	#if CORO_USE_VALGRIND
125	int valgrind_id;	206	int valgrind_id;
126	#endif	207	#endif
		208	unsigned char flags;
127	} coro_cctx;	209	} coro_cctx;
		210
		211	enum {
		212	CF_RUNNING = 0x0001, /* coroutine is running */
		213	CF_READY = 0x0002, /* coroutine is ready */
		214	CF_NEW = 0x0004, /* has never been switched to */
		215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		216	};
		217
		218	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		219	typedef struct {
		220	SV *defsv;
		221	AV *defav;
		222	SV *errsv;
		223	SV *irsgv;
		224	#define VAR(name,type) type name;
		225	# include "state.h"
		226	#undef VAR
		227	} perl_slots;
		228
		229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
128		230
129	/* this is a structure representing a perl-level coroutine */	231	/* this is a structure representing a perl-level coroutine */
130	struct coro {	232	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	233	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	234	coro_cctx *cctx;
133		235
		236	/* process data */
		237	AV *mainstack;
		238	perl_slots *slot; /* basically the saved sp */
		239
134	/* data associated with this coroutine (initial args) */	240	AV *args; /* data associated with this coroutine (initial args) */
135	AV *args;	241	int refcnt; /* coroutines are refcounted, yes */
136	int refcnt;	242	int flags; /* CF_ flags */
		243	HV *hv; /* the perl hash associated with this coro, if any */
137		244
138	/* optionally saved, might be zero */	245	/* statistics */
139	AV *defav;	246	int usecount; /* number of transfers to this coro */
140	SV *defsv;
141	SV *errsv;
142
143	#define VAR(name,type) type name;
144	# include "state.h"
145	#undef VAR
146		247
147	/* coro process data */	248	/* coro process data */
148	int prio;	249	int prio;
		250	SV *throw; /* exception to be thrown */
		251
		252	/* async_pool */
		253	SV *saved_deffh;
		254
		255	/* linked list */
		256	struct coro *next, *prev;
149	};	257	};
150		258
151	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
153		261
		262	/** Coro ********************************************************************/
		263
		264	#define PRIO_MAX 3
		265	#define PRIO_HIGH 1
		266	#define PRIO_NORMAL 0
		267	#define PRIO_LOW -1
		268	#define PRIO_IDLE -3
		269	#define PRIO_MIN -4
		270
		271	/* for Coro.pm */
		272	static SV *coro_current;
		273	static SV *coro_readyhook;
		274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		275	static int coro_nready;
		276	static struct coro *coro_first;
		277
		278	/** lowlevel stuff **********************************************************/
		279
		280	static SV *
		281	coro_get_sv (pTHX_ const char *name, int create)
		282	{
		283	#if PERL_VERSION_ATLEAST (5,10,0)
		284	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		285	get_sv (name, create);
		286	#endif
		287	return get_sv (name, create);
		288	}
		289
154	static AV *	290	static AV *
		291	coro_get_av (pTHX_ const char *name, int create)
		292	{
		293	#if PERL_VERSION_ATLEAST (5,10,0)
		294	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		295	get_av (name, create);
		296	#endif
		297	return get_av (name, create);
		298	}
		299
		300	static HV *
		301	coro_get_hv (pTHX_ const char *name, int create)
		302	{
		303	#if PERL_VERSION_ATLEAST (5,10,0)
		304	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		305	get_hv (name, create);
		306	#endif
		307	return get_hv (name, create);
		308	}
		309
		310	static AV *
155	coro_clone_padlist (CV *cv)	311	coro_clone_padlist (pTHX_ CV *cv)
156	{	312	{
157	AV *padlist = CvPADLIST (cv);	313	AV *padlist = CvPADLIST (cv);
158	AV *newpadlist, *newpad;	314	AV *newpadlist, *newpad;
159		315
160	newpadlist = newAV ();	316	newpadlist = newAV ();
161	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
162	#if PERL_VERSION_ATLEAST (5,9,0)	318	#if PERL_VERSION_ATLEAST (5,10,0)
163	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
164	#else	320	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#endif	322	#endif
167	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
172		328
173	return newpadlist;	329	return newpadlist;
174	}	330	}
175		331
176	static void	332	static void
177	free_padlist (AV *padlist)	333	free_padlist (pTHX_ AV *padlist)
178	{	334	{
179	/* may be during global destruction */	335	/* may be during global destruction */
180	if (SvREFCNT (padlist))	336	if (SvREFCNT (padlist))
181	{	337	{
182	I32 i = AvFILLp (padlist);	338	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	359	AV *padlist;
204	AV *av = (AV *)mg->mg_obj;	360	AV *av = (AV *)mg->mg_obj;
205		361
206	/* casting is fun. */	362	/* casting is fun. */
207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	363	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208	free_padlist (padlist);	364	free_padlist (aTHX_ padlist);
209
210	SvREFCNT_dec (av);
211		365
212	return 0;	366	return 0;
213	}	367	}
214		368
215	#define PERL_MAGIC_coro PERL_MAGIC_ext	369	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		370	#define CORO_MAGIC_type_state PERL_MAGIC_ext
216		371
217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	372	static MGVTBL coro_cv_vtbl = {
		373	0, 0, 0, 0,
		374	coro_cv_free
		375	};
		376
		377	#define CORO_MAGIC(sv,type) \
		378	SvMAGIC (sv) \
		379	? SvMAGIC (sv)->mg_type == type \
		380	? SvMAGIC (sv) \
		381	: mg_find (sv, type) \
		382	: 0
		383
		384	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		385	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		386
		387	static struct coro *
		388	SvSTATE_ (pTHX_ SV *coro)
		389	{
		390	HV *stash;
		391	MAGIC *mg;
		392
		393	if (SvROK (coro))
		394	coro = SvRV (coro);
		395
		396	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		397	croak ("Coro::State object required");
		398
		399	stash = SvSTASH (coro);
		400	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		401	{
		402	/* very slow, but rare, check */
		403	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		404	croak ("Coro::State object required");
		405	}
		406
		407	mg = CORO_MAGIC_state (coro);
		408	return (struct coro *)mg->mg_ptr;
		409	}
		410
		411	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
218		412
219	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
220	static void	414	static void
221	get_padlist (CV *cv)	415	get_padlist (pTHX_ CV *cv)
222	{	416	{
223	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
		418	AV *av;
224		419
225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
226	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
227	else	422	else
228	{	423	{
229	#if 0	424	#if CORO_PREFER_PERL_FUNCTIONS
230	/* this is probably cleaner, but also slower? */	425	/* this is probably cleaner, but also slower? */
231	CV *cp = Perl_cv_clone (cv);	426	CV *cp = Perl_cv_clone (cv);
232	CvPADLIST (cv) = CvPADLIST (cp);	427	CvPADLIST (cv) = CvPADLIST (cp);
233	CvPADLIST (cp) = 0;	428	CvPADLIST (cp) = 0;
234	SvREFCNT_dec (cp);	429	SvREFCNT_dec (cp);
235	#else	430	#else
236	CvPADLIST (cv) = coro_clone_padlist (cv);	431	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
237	#endif	432	#endif
238	}	433	}
239	}	434	}
240		435
241	static void	436	static void
242	put_padlist (CV *cv)	437	put_padlist (pTHX_ CV *cv)
243	{	438	{
244	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	439	MAGIC *mg = CORO_MAGIC_cv (cv);
		440	AV *av;
245		441
246	if (!mg)	442	if (expect_false (!mg))
247	{	443	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
248	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
249	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
250	mg->mg_virtual = &vtbl_coro;
251	mg->mg_obj = (SV *)newAV ();
252	}
253		444
254	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	445	av = (AV *)mg->mg_obj;
255	}
256		446
257	#define SB do {	447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
258	#define SE } while (0)	448	av_extend (av, AvMAX (av) + 1);
259		449
260	#define LOAD(state) load_state((state));	450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261	#define SAVE(state,flags) save_state((state),(flags));	451	}
262		452
263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	453	/** load & save, init *******************************************************/
264		454
265	static void	455	static void
266	load_state(Coro__State c)	456	load_perl (pTHX_ Coro__State c)
267	{	457	{
		458	perl_slots *slot = c->slot;
		459	c->slot = 0;
		460
		461	PL_mainstack = c->mainstack;
		462
		463	GvSV (PL_defgv) = slot->defsv;
		464	GvAV (PL_defgv) = slot->defav;
		465	GvSV (PL_errgv) = slot->errsv;
		466	GvSV (irsgv) = slot->irsgv;
		467
268	#define VAR(name,type) PL_ ## name = c->name;	468	#define VAR(name,type) PL_ ## name = slot->name;
269	# include "state.h"	469	# include "state.h"
270	#undef VAR	470	#undef VAR
271
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275		471
276	{	472	{
277	dSP;	473	dSP;
		474
278	CV *cv;	475	CV *cv;
279		476
280	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
281	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
282	{	479	{
283	AV *padlist = (AV *)POPs;
284
285	if (padlist)
286	{
287	put_padlist (cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
288	CvPADLIST(cv) = padlist;	481	CvDEPTH (cv) = PTR2IV (POPs);
289	}	482	CvPADLIST (cv) = (AV *)POPs;
290
291	++CvDEPTH(cv);
292	}	483	}
293		484
294	PUTBACK;	485	PUTBACK;
295	}	486	}
296	}	487	}
297		488
298	static void	489	static void
299	save_state(Coro__State c, int flags)	490	save_perl (pTHX_ Coro__State c)
300	{	491	{
301	{	492	{
302	dSP;	493	dSP;
303	I32 cxix = cxstack_ix;	494	I32 cxix = cxstack_ix;
304	PERL_CONTEXT *ccstk = cxstack;	495	PERL_CONTEXT *ccstk = cxstack;
…		…
307	/*	498	/*
308	* the worst thing you can imagine happens first - we have to save	499	* the worst thing you can imagine happens first - we have to save
309	* (and reinitialize) all cv's in the whole callchain :(	500	* (and reinitialize) all cv's in the whole callchain :(
310	*/	501	*/
311		502
312	PUSHs (Nullsv);	503	XPUSHs (Nullsv);
313	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
314	for (;;)	505	for (;;)
315	{	506	{
316	while (cxix >= 0)	507	while (expect_true (cxix >= 0))
317	{	508	{
318	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
319		510
320	if (CxTYPE(cx) == CXt_SUB)	511	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
321	{	512	{
322	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
		514
323	if (CvDEPTH(cv))	515	if (expect_true (CvDEPTH (cv)))
324	{	516	{
325	EXTEND (SP, CvDEPTH(cv)*2);	517	EXTEND (SP, 3);
326
327	while (--CvDEPTH(cv))
328	{
329	/* this tells the restore code to increment CvDEPTH */
330	PUSHs (Nullsv);
331	PUSHs ((SV *)cv);
332	}
333
334	PUSHs ((SV *)CvPADLIST(cv));	518	PUSHs ((SV *)CvPADLIST (cv));
		519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
335	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
336		521
		522	CvDEPTH (cv) = 0;
337	get_padlist (cv);	523	get_padlist (aTHX_ cv);
338	}	524	}
339	}	525	}
340	#ifdef CXt_FORMAT
341	else if (CxTYPE(cx) == CXt_FORMAT)
342	{
343	/* I never used formats, so how should I know how these are implemented? */
344	/* my bold guess is as a simple, plain sub... */
345	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
346	}
347	#endif
348	}	526	}
349		527
350	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
351	break;	529	break;
352		530
353	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
354	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
355	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
356	}	534	}
357		535
358	PUTBACK;	536	PUTBACK;
359	}	537	}
360		538
361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	539	/* allocate some space on the context stack for our purposes */
362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	541	if (SLOT_COUNT >= 1) CXINC;
		542	if (SLOT_COUNT >= 2) CXINC;
		543	if (SLOT_COUNT >= 3) CXINC;
		544	{
		545	int i;
		546	for (i = 3; i < SLOT_COUNT; ++i)
		547	CXINC;
		548	}
		549	cxstack_ix -= SLOT_COUNT; /* undo allocation */
364		550
		551	c->mainstack = PL_mainstack;
		552
		553	{
		554	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		555
		556	slot->defav = GvAV (PL_defgv);
		557	slot->defsv = DEFSV;
		558	slot->errsv = ERRSV;
		559	slot->irsgv = GvSV (irsgv);
		560
365	#define VAR(name,type)c->name = PL_ ## name;	561	#define VAR(name,type) slot->name = PL_ ## name;
366	# include "state.h"	562	# include "state.h"
367	#undef VAR	563	#undef VAR
		564	}
368	}	565	}
369		566
370	/*	567	/*
371	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
372	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
373	* on the (sometimes correct) assumption that coroutines do	570	* on the (sometimes correct) assumption that coroutines do
374	* not usually need a lot of stackspace.	571	* not usually need a lot of stackspace.
375	*/	572	*/
		573	#if CORO_PREFER_PERL_FUNCTIONS
		574	# define coro_init_stacks init_stacks
		575	#else
376	static void	576	static void
377	coro_init_stacks ()	577	coro_init_stacks (pTHX)
378	{	578	{
379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	579	PL_curstackinfo = new_stackinfo(32, 8);
380	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
381	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
383		583
384	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
385	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
386	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
387		587
388	New(50,PL_tmps_stack,96,SV*);	588	New(50,PL_tmps_stack,32,SV*);
389	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
390	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
391	PL_tmps_max = 96;	591	PL_tmps_max = 32;
392		592
393	New(54,PL_markstack,16,I32);	593	New(54,PL_markstack,16,I32);
394	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
395	PL_markstack_max = PL_markstack + 16;	595	PL_markstack_max = PL_markstack + 16;
396		596
397	#ifdef SET_MARK_OFFSET	597	#ifdef SET_MARK_OFFSET
398	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
399	#endif	599	#endif
400		600
401	New(54,PL_scopestack,16,I32);	601	New(54,PL_scopestack,8,I32);
402	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
403	PL_scopestack_max = 16;	603	PL_scopestack_max = 8;
404		604
405	New(54,PL_savestack,96,ANY);	605	New(54,PL_savestack,24,ANY);
406	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
407	PL_savestack_max = 96;	607	PL_savestack_max = 24;
408		608
409	#if !PERL_VERSION_ATLEAST (5,9,0)	609	#if !PERL_VERSION_ATLEAST (5,10,0)
410	New(54,PL_retstack,8,OP*);	610	New(54,PL_retstack,4,OP*);
411	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
412	PL_retstack_max = 8;	612	PL_retstack_max = 4;
413	#endif	613	#endif
414	}	614	}
		615	#endif
415		616
416	/*	617	/*
417	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
418	*/	619	*/
419	static void	620	static void
420	coro_destroy_stacks ()	621	coro_destroy_stacks (pTHX)
421	{	622	{
422	if (!IN_DESTRUCT)
423	{
424	/* is this ugly, I ask? */
425	LEAVE_SCOPE (0);
426
427	/* sure it is, but more important: is it correct?? :/ */
428	FREETMPS;
429
430	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
431	}
432
433	while (PL_curstackinfo->si_next)	623	while (PL_curstackinfo->si_next)
434	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
435		625
436	while (PL_curstackinfo)	626	while (PL_curstackinfo)
437	{	627	{
438	PERL_SI *p = PL_curstackinfo->si_prev;	628	PERL_SI *p = PL_curstackinfo->si_prev;
439		629
440	{ /*D*//*remove*/
441	dSP;
442	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
443	PUTBACK; /* possibly superfluous */
444	}
445
446	if (!IN_DESTRUCT)	630	if (!IN_DESTRUCT)
447	{
448	dounwind (-1);/*D*//*remove*/
449	SvREFCNT_dec (PL_curstackinfo->si_stack);	631	SvREFCNT_dec (PL_curstackinfo->si_stack);
450	}
451		632
452	Safefree (PL_curstackinfo->si_cxstack);	633	Safefree (PL_curstackinfo->si_cxstack);
453	Safefree (PL_curstackinfo);	634	Safefree (PL_curstackinfo);
454	PL_curstackinfo = p;	635	PL_curstackinfo = p;
455	}	636	}
456		637
457	Safefree (PL_tmps_stack);	638	Safefree (PL_tmps_stack);
458	Safefree (PL_markstack);	639	Safefree (PL_markstack);
459	Safefree (PL_scopestack);	640	Safefree (PL_scopestack);
460	Safefree (PL_savestack);	641	Safefree (PL_savestack);
461	#if !PERL_VERSION_ATLEAST (5,9,0)	642	#if !PERL_VERSION_ATLEAST (5,10,0)
462	Safefree (PL_retstack);	643	Safefree (PL_retstack);
463	#endif	644	#endif
464	}	645	}
465		646
		647	static size_t
		648	coro_rss (pTHX_ struct coro *coro)
		649	{
		650	size_t rss = sizeof (*coro);
		651
		652	if (coro->mainstack)
		653	{
		654	perl_slots tmp_slot;
		655	perl_slots *slot;
		656
		657	if (coro->flags & CF_RUNNING)
		658	{
		659	slot = &tmp_slot;
		660
		661	#define VAR(name,type) slot->name = PL_ ## name;
		662	# include "state.h"
		663	#undef VAR
		664	}
		665	else
		666	slot = coro->slot;
		667
		668	rss += sizeof (slot->curstackinfo);
		669	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		670	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		671	rss += slot->tmps_max * sizeof (SV *);
		672	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		673	rss += slot->scopestack_max * sizeof (I32);
		674	rss += slot->savestack_max * sizeof (ANY);
		675
		676	#if !PERL_VERSION_ATLEAST (5,10,0)
		677	rss += slot->retstack_max * sizeof (OP *);
		678	#endif
		679	}
		680
		681	return rss;
		682	}
		683
		684	/** coroutine stack handling ************************************************/
		685
		686	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		687	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		688	static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
		689
		690	/* apparently < 5.8.8 */
		691	#undef MgPV_nolen_const
		692	#ifndef MgPV_nolen_const
		693	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		694	SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
		695	(const char*)(mg)->mg_ptr)
		696	#endif
		697
		698	/*
		699	* This overrides the default magic get method of %SIG elements.
		700	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		701	* and instead of tryign to save and restore the hash elements, we just provide
		702	* readback here.
		703	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		704	* not expecting this to actually change the hook. This is a potential problem
		705	* when a schedule happens then, but we ignore this.
		706	*/
		707	static int
		708	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		709	{
		710	const char *s = MgPV_nolen_const (mg);
		711
		712	if (*s == '_')
		713	{
		714	SV **svp = 0;
		715
		716	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		717	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		718
		719	if (svp)
		720	{
		721	sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
		722	return 0;
		723	}
		724	}
		725
		726	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		727	}
		728
		729	static int
		730	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		731	{
		732	const char *s = MgPV_nolen_const (mg);
		733
		734	if (*s == '_')
		735	{
		736	SV **svp = 0;
		737
		738	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		739	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		740
		741	if (svp)
		742	{
		743	SV *old = *svp;
		744	*svp = 0;
		745	SvREFCNT_dec (old);
		746	return 0;
		747	}
		748	}
		749
		750	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		751	}
		752
		753	static int
		754	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		755	{
		756	const char *s = MgPV_nolen_const (mg);
		757
		758	if (*s == '_')
		759	{
		760	SV **svp = 0;
		761
		762	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		763	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		764
		765	if (svp)
		766	{
		767	SV *old = *svp;
		768	*svp = newSVsv (sv);
		769	SvREFCNT_dec (old);
		770	return 0;
		771	}
		772	}
		773
		774	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		775	}
		776
466	static void	777	static void
467	setup_coro (struct coro *coro)	778	coro_setup (pTHX_ struct coro *coro)
468	{	779	{
469	/*	780	/*
470	* emulate part of the perl startup here.	781	* emulate part of the perl startup here.
471	*/	782	*/
472
473	coro_init_stacks ();	783	coro_init_stacks (aTHX);
474		784
		785	PL_runops = RUNOPS_DEFAULT;
		786	PL_curcop = &PL_compiling;
		787	PL_in_eval = EVAL_NULL;
475	PL_curcop = 0;	788	PL_comppad = 0;
476	PL_in_eval = 0;
477	PL_curpm = 0;	789	PL_curpm = 0;
		790	PL_curpad = 0;
		791	PL_localizing = 0;
		792	PL_dirty = 0;
		793	PL_restartop = 0;
		794	#if PERL_VERSION_ATLEAST (5,10,0)
		795	PL_parser = 0;
		796	#endif
		797
		798	/* recreate the die/warn hooks */
		799	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		800	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		801
		802	GvSV (PL_defgv) = newSV (0);
		803	GvAV (PL_defgv) = coro->args; coro->args = 0;
		804	GvSV (PL_errgv) = newSV (0);
		805	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		806	PL_rs = newSVsv (GvSV (irsgv));
		807	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
478		808
479	{	809	{
480	dSP;	810	dSP;
481	LOGOP myop;	811	LOGOP myop;
482		812
483	/* I have no idea why this is needed, but it is */
484	PUSHMARK (SP);
485
486	SvREFCNT_dec (GvAV (PL_defgv));
487	GvAV (PL_defgv) = coro->args; coro->args = 0;
488
489	Zero (&myop, 1, LOGOP);	813	Zero (&myop, 1, LOGOP);
490	myop.op_next = Nullop;	814	myop.op_next = Nullop;
491	myop.op_flags = OPf_WANT_VOID;	815	myop.op_flags = OPf_WANT_VOID;
492		816
		817	PUSHMARK (SP);
		818	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		819	PUTBACK;
493	PL_op = (OP *)&myop;	820	PL_op = (OP *)&myop;
494
495	PUSHMARK (SP);
496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
497	PUTBACK;
498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	821	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
499	SPAGAIN;	822	SPAGAIN;
500
501	ENTER; /* necessary e.g. for dounwind */
502	}	823	}
		824
		825	/* this newly created coroutine might be run on an existing cctx which most
		826	* likely was suspended in set_stacklevel, called from entersub.
		827	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		828	* so we ENTER here for symmetry
		829	*/
		830	ENTER;
503	}	831	}
504		832
505	static void	833	static void
		834	coro_destroy (pTHX_ struct coro *coro)
		835	{
		836	if (!IN_DESTRUCT)
		837	{
		838	/* restore all saved variables and stuff */
		839	LEAVE_SCOPE (0);
		840	assert (PL_tmps_floor == -1);
		841
		842	/* free all temporaries */
		843	FREETMPS;
		844	assert (PL_tmps_ix == -1);
		845
		846	/* unwind all extra stacks */
		847	POPSTACK_TO (PL_mainstack);
		848
		849	/* unwind main stack */
		850	dounwind (-1);
		851	}
		852
		853	SvREFCNT_dec (GvSV (PL_defgv));
		854	SvREFCNT_dec (GvAV (PL_defgv));
		855	SvREFCNT_dec (GvSV (PL_errgv));
		856	SvREFCNT_dec (PL_defoutgv);
		857	SvREFCNT_dec (PL_rs);
		858	SvREFCNT_dec (GvSV (irsgv));
		859
		860	SvREFCNT_dec (PL_diehook);
		861	SvREFCNT_dec (PL_warnhook);
		862
		863	SvREFCNT_dec (coro->saved_deffh);
		864	SvREFCNT_dec (coro->throw);
		865
		866	coro_destroy_stacks (aTHX);
		867	}
		868
		869	static void
506	free_coro_mortal ()	870	free_coro_mortal (pTHX)
507	{	871	{
508	if (coro_mortal)	872	if (expect_true (coro_mortal))
509	{	873	{
510	SvREFCNT_dec (coro_mortal);	874	SvREFCNT_dec (coro_mortal);
511	coro_mortal = 0;	875	coro_mortal = 0;
512	}	876	}
513	}	877	}
514		878
		879	static int
		880	runops_trace (pTHX)
		881	{
		882	COP *oldcop = 0;
		883	int oldcxix = -2;
		884	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		885	coro_cctx *cctx = coro->cctx;
		886
		887	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		888	{
		889	PERL_ASYNC_CHECK ();
		890
		891	if (cctx->flags & CC_TRACE_ALL)
		892	{
		893	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		894	{
		895	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		896	SV **bot, **top;
		897	AV *av = newAV (); /* return values */
		898	SV **cb;
		899	dSP;
		900
		901	GV *gv = CvGV (cx->blk_sub.cv);
		902	SV *fullname = sv_2mortal (newSV (0));
		903	if (isGV (gv))
		904	gv_efullname3 (fullname, gv, 0);
		905
		906	bot = PL_stack_base + cx->blk_oldsp + 1;
		907	top = cx->blk_gimme == G_ARRAY ? SP + 1
		908	: cx->blk_gimme == G_SCALAR ? bot + 1
		909	: bot;
		910
		911	av_extend (av, top - bot);
		912	while (bot < top)
		913	av_push (av, SvREFCNT_inc (*bot++));
		914
		915	PL_runops = RUNOPS_DEFAULT;
		916	ENTER;
		917	SAVETMPS;
		918	EXTEND (SP, 3);
		919	PUSHMARK (SP);
		920	PUSHs (&PL_sv_no);
		921	PUSHs (fullname);
		922	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		923	PUTBACK;
		924	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		925	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		926	SPAGAIN;
		927	FREETMPS;
		928	LEAVE;
		929	PL_runops = runops_trace;
		930	}
		931
		932	if (oldcop != PL_curcop)
		933	{
		934	oldcop = PL_curcop;
		935
		936	if (PL_curcop != &PL_compiling)
		937	{
		938	SV **cb;
		939
		940	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		941	{
		942	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		943
		944	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		945	{
		946	runops_proc_t old_runops = PL_runops;
		947	dSP;
		948	GV *gv = CvGV (cx->blk_sub.cv);
		949	SV *fullname = sv_2mortal (newSV (0));
		950
		951	if (isGV (gv))
		952	gv_efullname3 (fullname, gv, 0);
		953
		954	PL_runops = RUNOPS_DEFAULT;
		955	ENTER;
		956	SAVETMPS;
		957	EXTEND (SP, 3);
		958	PUSHMARK (SP);
		959	PUSHs (&PL_sv_yes);
		960	PUSHs (fullname);
		961	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		962	PUTBACK;
		963	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		964	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		965	SPAGAIN;
		966	FREETMPS;
		967	LEAVE;
		968	PL_runops = runops_trace;
		969	}
		970
		971	oldcxix = cxstack_ix;
		972	}
		973
		974	if (cctx->flags & CC_TRACE_LINE)
		975	{
		976	dSP;
		977
		978	PL_runops = RUNOPS_DEFAULT;
		979	ENTER;
		980	SAVETMPS;
		981	EXTEND (SP, 3);
		982	PL_runops = RUNOPS_DEFAULT;
		983	PUSHMARK (SP);
		984	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		985	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		986	PUTBACK;
		987	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		988	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		989	SPAGAIN;
		990	FREETMPS;
		991	LEAVE;
		992	PL_runops = runops_trace;
		993	}
		994	}
		995	}
		996	}
		997	}
		998
		999	TAINT_NOT;
		1000	return 0;
		1001	}
		1002
		1003	/* inject a fake call to Coro::State::_cctx_init into the execution */
		1004	/* _cctx_init should be careful, as it could be called at almost any time */
		1005	/* during execution of a perl program */
515	static void NOINLINE	1006	static void NOINLINE
516	prepare_cctx (coro_cctx *cctx)	1007	cctx_prepare (pTHX_ coro_cctx *cctx)
517	{	1008	{
518	dSP;	1009	dSP;
519	LOGOP myop;	1010	LOGOP myop;
520		1011
		1012	PL_top_env = &PL_start_env;
		1013
		1014	if (cctx->flags & CC_TRACE)
		1015	PL_runops = runops_trace;
		1016
521	Zero (&myop, 1, LOGOP);	1017	Zero (&myop, 1, LOGOP);
522	myop.op_next = PL_op;	1018	myop.op_next = PL_op;
523	myop.op_flags = OPf_WANT_VOID;	1019	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
524
525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
526		1020
527	PUSHMARK (SP);	1021	PUSHMARK (SP);
		1022	EXTEND (SP, 2);
		1023	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1024	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
529	PUTBACK;	1025	PUTBACK;
		1026	PL_op = (OP *)&myop;
530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	1027	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
531	SPAGAIN;	1028	SPAGAIN;
532	}	1029	}
533		1030
		1031	/*
		1032	* this is a _very_ stripped down perl interpreter ;)
		1033	*/
534	static void	1034	static void
535	coro_run (void *arg)	1035	cctx_run (void *arg)
536	{	1036	{
		1037	dTHX;
		1038
537	/* coro_run is the alternative epilogue of transfer() */	1039	/* cctx_run is the alternative tail of transfer(), so unlock here. */
538	UNLOCK;	1040	UNLOCK;
539		1041
		1042	/* we now skip the entersub that lead to transfer() */
		1043	PL_op = PL_op->op_next;
		1044
		1045	/* inject a fake subroutine call to cctx_init */
		1046	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1047
		1048	/* somebody or something will hit me for both perl_run and PL_restartop */
		1049	PL_restartop = PL_op;
		1050	perl_run (PL_curinterp);
		1051
540	/*	1052	/*
541	* this is a _very_ stripped down perl interpreter ;)	1053	* If perl-run returns we assume exit() was being called or the coro
		1054	* fell off the end, which seems to be the only valid (non-bug)
		1055	* reason for perl_run to return. We try to exit by jumping to the
		1056	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1057	* coroutine as Coro has no such concept
542	*/	1058	*/
543	PL_top_env = &PL_start_env;	1059	PL_top_env = main_top_env;
544		1060	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
545	/* inject call to cctx_init */
546	prepare_cctx ((coro_cctx *)arg);
547
548	/* somebody will hit me for both perl_run and PL_restartop */
549	perl_run (PL_curinterp);
550
551	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
552	abort ();
553	}	1061	}
554		1062
555	static coro_cctx *	1063	static coro_cctx *
556	cctx_new ()	1064	cctx_new ()
557	{	1065	{
558	coro_cctx *cctx;	1066	coro_cctx *cctx;
		1067	void *stack_start;
		1068	size_t stack_size;
559		1069
560	++cctx_count;	1070	++cctx_count;
561		1071
562	New (0, cctx, 1, coro_cctx);	1072	Newz (0, cctx, 1, coro_cctx);
563		1073
564	#if HAVE_MMAP	1074	#if HAVE_MMAP
565
566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1075	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
567	/* mmap suppsedly does allocate-on-write for us */	1076	/* mmap supposedly does allocate-on-write for us */
568	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1077	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
569		1078
570	if (cctx->sptr == (void *)-1)	1079	if (cctx->sptr != (void *)-1)
571	{
572	perror ("FATAL: unable to mmap stack for coroutine");
573	_exit (EXIT_FAILURE);
574	}	1080	{
575
576	# if STACKGUARD	1081	# if CORO_STACKGUARD
577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1082	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
578	# endif	1083	# endif
		1084	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1085	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1086	cctx->flags |= CC_MAPPED;
		1087	}
		1088	else
		1089	#endif
		1090	{
		1091	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1092	New (0, cctx->sptr, coro_stacksize, long);
579		1093
580	#else
581
582	cctx->ssize = STACKSIZE * (long)sizeof (long);
583	New (0, cctx->sptr, STACKSIZE, long);
584
585	if (!cctx->sptr)	1094	if (!cctx->sptr)
586	{	1095	{
587	perror ("FATAL: unable to malloc stack for coroutine");	1096	perror ("FATAL: unable to allocate stack for coroutine");
588	_exit (EXIT_FAILURE);	1097	_exit (EXIT_FAILURE);
589	}	1098	}
590		1099
591	#endif	1100	stack_start = cctx->sptr;
		1101	stack_size = cctx->ssize;
		1102	}
592		1103
593	#if USE_VALGRIND	1104	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
594	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1105	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
595	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
596	cctx->ssize + (char *)cctx->sptr
597	);
598	#endif
599
600	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
601		1106
602	return cctx;	1107	return cctx;
603	}	1108	}
604		1109
605	static void	1110	static void
606	cctx_free (coro_cctx *cctx)	1111	cctx_destroy (coro_cctx *cctx)
607	{	1112	{
608	if (!cctx)	1113	if (!cctx)
609	return;	1114	return;
610		1115
611	--cctx_count;	1116	--cctx_count;
612		1117
613	#if USE_VALGRIND	1118	#if CORO_USE_VALGRIND
614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1119	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
615	#endif	1120	#endif
616		1121
617	#if HAVE_MMAP	1122	#if HAVE_MMAP
		1123	if (cctx->flags & CC_MAPPED)
618	munmap (cctx->sptr, cctx->ssize);	1124	munmap (cctx->sptr, cctx->ssize);
619	#else	1125	else
		1126	#endif
620	Safefree (cctx->sptr);	1127	Safefree (cctx->sptr);
621	#endif
622		1128
623	Safefree (cctx);	1129	Safefree (cctx);
624	}	1130	}
625		1131
		1132	/* wether this cctx should be destructed */
		1133	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1134
626	static coro_cctx *	1135	static coro_cctx *
627	cctx_get ()	1136	cctx_get (pTHX)
628	{	1137	{
629	coro_cctx *cctx;	1138	while (expect_true (cctx_first))
630
631	if (cctx_first)
632	{	1139	{
		1140	coro_cctx *cctx = cctx_first;
		1141	cctx_first = cctx->next;
633	--cctx_idle;	1142	--cctx_idle;
634	cctx = cctx_first;	1143
635	cctx_first = cctx->next;	1144	if (expect_true (!CCTX_EXPIRED (cctx)))
636	}	1145	return cctx;
637	else	1146
638	{	1147	cctx_destroy (cctx);
639	cctx = cctx_new ();
640	PL_op = PL_op->op_next;
641	}	1148	}
642		1149
643	return cctx;	1150	return cctx_new ();
644	}	1151	}
645		1152
646	static void	1153	static void
647	cctx_put (coro_cctx *cctx)	1154	cctx_put (coro_cctx *cctx)
648	{	1155	{
		1156	/* free another cctx if overlimit */
		1157	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1158	{
		1159	coro_cctx *first = cctx_first;
		1160	cctx_first = first->next;
		1161	--cctx_idle;
		1162
		1163	cctx_destroy (first);
		1164	}
		1165
649	++cctx_idle;	1166	++cctx_idle;
650	cctx->next = cctx_first;	1167	cctx->next = cctx_first;
651	cctx_first = cctx;	1168	cctx_first = cctx;
652	}	1169	}
653		1170
654	/* never call directly, always through the coro_state_transfer global variable */	1171	/** coroutine switching *****************************************************/
		1172
		1173	static void
		1174	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1175	{
		1176	if (expect_true (prev != next))
		1177	{
		1178	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1179	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1180
		1181	if (expect_false (next->flags & CF_RUNNING))
		1182	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1183
		1184	if (expect_false (next->flags & CF_DESTROYED))
		1185	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1186
		1187	#if !PERL_VERSION_ATLEAST (5,10,0)
		1188	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1189	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1190	#endif
		1191	}
		1192	}
		1193
		1194	/* always use the TRANSFER macro */
655	static void NOINLINE	1195	static void NOINLINE
656	transfer (struct coro *prev, struct coro *next, int flags)	1196	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
657	{	1197	{
658	dSTACKLEVEL;	1198	dSTACKLEVEL;
		1199	static volatile int has_throw;
659		1200
660	/* sometimes transfer is only called to set idle_sp */	1201	/* sometimes transfer is only called to set idle_sp */
661	if (flags == TRANSFER_SET_STACKLEVEL)	1202	if (expect_false (!next))
		1203	{
662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1204	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1205	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1206	}
663	else if (prev != next)	1207	else if (expect_true (prev != next))
664	{	1208	{
665	coro_cctx *prev__cctx;	1209	coro_cctx *prev__cctx;
666		1210
		1211	if (expect_false (prev->flags & CF_NEW))
		1212	{
		1213	/* create a new empty context */
		1214	Newz (0, prev->cctx, 1, coro_cctx);
		1215	prev->flags &= ~CF_NEW;
		1216	prev->flags |= CF_RUNNING;
		1217	}
		1218
		1219	prev->flags &= ~CF_RUNNING;
		1220	next->flags |= CF_RUNNING;
		1221
667	LOCK;	1222	LOCK;
668		1223
669	if (next->mainstack)	1224	/* first get rid of the old state */
		1225	save_perl (aTHX_ prev);
		1226
		1227	if (expect_false (next->flags & CF_NEW))
670	{	1228	{
671	/* coroutine already started */	1229	/* need to start coroutine */
672	SAVE (prev, flags);	1230	next->flags &= ~CF_NEW;
673	LOAD (next);	1231	/* setup coroutine call */
		1232	coro_setup (aTHX_ next);
674	}	1233	}
675	else	1234	else
		1235	load_perl (aTHX_ next);
		1236
		1237	prev__cctx = prev->cctx;
		1238
		1239	/* possibly "free" the cctx */
		1240	if (expect_true (
		1241	prev__cctx->idle_sp == STACKLEVEL
		1242	&& !(prev__cctx->flags & CC_TRACE)
		1243	&& !force_cctx
		1244	))
676	{	1245	{
677	/* need to start coroutine */	1246	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
678	/* first get rid of the old state */	1247	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
679	SAVE (prev, -1);	1248
680	/* setup coroutine call */
681	setup_coro (next);
682	/* need a stack */
683	next->cctx = 0;	1249	prev->cctx = 0;
		1250
		1251	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1252	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1253	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1254	if (!next->cctx)
		1255	next->cctx = cctx_get (aTHX);
		1256
		1257	cctx_put (prev__cctx);
684	}	1258	}
685		1259
686	if (!prev->cctx)	1260	++next->usecount;
687	/* create a new empty context */
688	Newz (0, prev->cctx, 1, coro_cctx);
689		1261
690	prev__cctx = prev->cctx;
691
692	/* possibly "free" the cctx */
693	if (prev__cctx->idle_sp == STACKLEVEL)
694	{
695	cctx_put (prev__cctx);
696	prev->cctx = 0;
697	}
698
699	if (!next->cctx)	1262	if (expect_true (!next->cctx))
700	next->cctx = cctx_get ();	1263	next->cctx = cctx_get (aTHX);
701		1264
		1265	has_throw = !!next->throw;
		1266
702	if (prev__cctx != next->cctx)	1267	if (expect_false (prev__cctx != next->cctx))
703	{	1268	{
704	prev__cctx->top_env = PL_top_env;	1269	prev__cctx->top_env = PL_top_env;
705	PL_top_env = next->cctx->top_env;	1270	PL_top_env = next->cctx->top_env;
706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1271	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
707	}	1272	}
708		1273
709	free_coro_mortal ();	1274	free_coro_mortal (aTHX);
710
711	UNLOCK;	1275	UNLOCK;
		1276
		1277	if (expect_false (has_throw))
		1278	{
		1279	struct coro *coro = SvSTATE (coro_current);
		1280
		1281	if (coro->throw)
		1282	{
		1283	SV *exception = coro->throw;
		1284	coro->throw = 0;
		1285	sv_setsv (ERRSV, exception);
		1286	croak (0);
		1287	}
		1288	}
712	}	1289	}
713	}	1290	}
714		1291
715	struct transfer_args	1292	struct transfer_args
716	{	1293	{
717	struct coro *prev, *next;	1294	struct coro *prev, *next;
718	int flags;
719	};	1295	};
720		1296
		1297	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1298	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
722		1299
		1300	/** high level stuff ********************************************************/
		1301
723	static void	1302	static int
724	coro_state_destroy (struct coro *coro)	1303	coro_state_destroy (pTHX_ struct coro *coro)
725	{	1304	{
726	if (coro->refcnt--)	1305	if (coro->flags & CF_DESTROYED)
727	return;	1306	return 0;
		1307
		1308	coro->flags |= CF_DESTROYED;
		1309
		1310	if (coro->flags & CF_READY)
		1311	{
		1312	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1313	/* alternative: look through all ready queues and remove the coro */
		1314	LOCK;
		1315	--coro_nready;
		1316	UNLOCK;
		1317	}
		1318	else
		1319	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
728		1320
729	if (coro->mainstack && coro->mainstack != main_mainstack)	1321	if (coro->mainstack && coro->mainstack != main_mainstack)
730	{	1322	{
731	struct coro temp;	1323	struct coro temp;
732		1324
733	SAVE ((&temp), TRANSFER_SAVE_ALL);	1325	if (coro->flags & CF_RUNNING)
734	LOAD (coro);	1326	croak ("FATAL: tried to destroy currently running coroutine");
735		1327
736	coro_destroy_stacks ();	1328	save_perl (aTHX_ &temp);
		1329	load_perl (aTHX_ coro);
737		1330
738	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1331	coro_destroy (aTHX_ coro);
739		1332
		1333	load_perl (aTHX_ &temp);
		1334
740	coro->mainstack = 0;	1335	coro->slot = 0;
741	}	1336	}
742		1337
743	cctx_free (coro->cctx);	1338	cctx_destroy (coro->cctx);
744	SvREFCNT_dec (coro->args);	1339	SvREFCNT_dec (coro->args);
745	Safefree (coro);	1340
		1341	if (coro->next) coro->next->prev = coro->prev;
		1342	if (coro->prev) coro->prev->next = coro->next;
		1343	if (coro == coro_first) coro_first = coro->next;
		1344
		1345	return 1;
746	}	1346	}
747		1347
748	static int	1348	static int
749	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1349	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
750	{	1350	{
751	struct coro *coro = (struct coro *)mg->mg_ptr;	1351	struct coro *coro = (struct coro *)mg->mg_ptr;
752	mg->mg_ptr = 0;	1352	mg->mg_ptr = 0;
753		1353
		1354	coro->hv = 0;
		1355
		1356	if (--coro->refcnt < 0)
		1357	{
754	coro_state_destroy (coro);	1358	coro_state_destroy (aTHX_ coro);
		1359	Safefree (coro);
		1360	}
755		1361
756	return 0;	1362	return 0;
757	}	1363	}
758		1364
759	static int	1365	static int
…		…
766	return 0;	1372	return 0;
767	}	1373	}
768		1374
769	static MGVTBL coro_state_vtbl = {	1375	static MGVTBL coro_state_vtbl = {
770	0, 0, 0, 0,	1376	0, 0, 0, 0,
771	coro_state_clear,	1377	coro_state_free,
772	0,	1378	0,
773	#ifdef MGf_DUP	1379	#ifdef MGf_DUP
774	coro_state_dup,	1380	coro_state_dup,
775	#else	1381	#else
776	# define MGf_DUP 0	1382	# define MGf_DUP 0
777	#endif	1383	#endif
778	};	1384	};
779		1385
780	static struct coro *
781	SvSTATE (SV *coro)
782	{
783	HV *stash;
784	MAGIC *mg;
785
786	if (SvROK (coro))
787	coro = SvRV (coro);
788
789	stash = SvSTASH (coro);
790	if (stash != coro_stash && stash != coro_state_stash)
791	{
792	/* very slow, but rare, check */
793	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
794	croak ("Coro::State object required");
795	}
796
797	mg = SvMAGIC (coro);
798	assert (mg->mg_type == PERL_MAGIC_ext);
799	return (struct coro *)mg->mg_ptr;
800	}
801
802	static void	1386	static void
803	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1387	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
804	{	1388	{
805	ta->prev = SvSTATE (prev);	1389	ta->prev = SvSTATE (prev_sv);
806	ta->next = SvSTATE (next);	1390	ta->next = SvSTATE (next_sv);
807	ta->flags = flags;	1391	TRANSFER_CHECK (*ta);
808	}	1392	}
809		1393
810	static void	1394	static void
811	api_transfer (SV *prev, SV *next, int flags)	1395	api_transfer (SV *prev_sv, SV *next_sv)
812	{	1396	{
813	dTHX;	1397	dTHX;
814	struct transfer_args ta;	1398	struct transfer_args ta;
815		1399
816	prepare_transfer (&ta, prev, next, flags);	1400	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
817	TRANSFER (ta);	1401	TRANSFER (ta, 1);
818	}	1402	}
819		1403
820	/** Coro ********************************************************************/	1404	/** Coro ********************************************************************/
821		1405
822	#define PRIO_MAX 3
823	#define PRIO_HIGH 1
824	#define PRIO_NORMAL 0
825	#define PRIO_LOW -1
826	#define PRIO_IDLE -3
827	#define PRIO_MIN -4
828
829	/* for Coro.pm */
830	static GV *coro_current, *coro_idle;
831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832	static int coro_nready;
833
834	static void	1406	static void
835	coro_enq (SV *sv)	1407	coro_enq (pTHX_ SV *coro_sv)
		1408	{
		1409	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1410	}
		1411
		1412	static SV *
		1413	coro_deq (pTHX)
836	{	1414	{
837	int prio;	1415	int prio;
838		1416
839	if (SvTYPE (sv) != SVt_PVHV)
840	croak ("Coro::ready tried to enqueue something that is not a coroutine");
841
842	prio = SvSTATE (sv)->prio;
843
844	av_push (coro_ready [prio - PRIO_MIN], sv);
845	coro_nready++;
846	}
847
848	static SV *
849	coro_deq (int min_prio)
850	{
851	int prio = PRIO_MAX - PRIO_MIN;
852
853	min_prio -= PRIO_MIN;
854	if (min_prio < 0)
855	min_prio = 0;
856
857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1417	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
858	if (AvFILLp (coro_ready [prio]) >= 0)	1418	if (AvFILLp (coro_ready [prio]) >= 0)
859	{
860	coro_nready--;
861	return av_shift (coro_ready [prio]);	1419	return av_shift (coro_ready [prio]);
862	}
863		1420
864	return 0;	1421	return 0;
865	}	1422	}
866		1423
		1424	static int
		1425	api_ready (SV *coro_sv)
		1426	{
		1427	dTHX;
		1428	struct coro *coro;
		1429	SV *sv_hook;
		1430	void (*xs_hook)(void);
		1431
		1432	if (SvROK (coro_sv))
		1433	coro_sv = SvRV (coro_sv);
		1434
		1435	coro = SvSTATE (coro_sv);
		1436
		1437	if (coro->flags & CF_READY)
		1438	return 0;
		1439
		1440	coro->flags |= CF_READY;
		1441
		1442	LOCK;
		1443
		1444	sv_hook = coro_nready ? 0 : coro_readyhook;
		1445	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1446
		1447	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1448	++coro_nready;
		1449
		1450	UNLOCK;
		1451
		1452	if (sv_hook)
		1453	{
		1454	dSP;
		1455
		1456	ENTER;
		1457	SAVETMPS;
		1458
		1459	PUSHMARK (SP);
		1460	PUTBACK;
		1461	call_sv (sv_hook, G_DISCARD);
		1462	SPAGAIN;
		1463
		1464	FREETMPS;
		1465	LEAVE;
		1466	}
		1467
		1468	if (xs_hook)
		1469	xs_hook ();
		1470
		1471	return 1;
		1472	}
		1473
		1474	static int
		1475	api_is_ready (SV *coro_sv)
		1476	{
		1477	dTHX;
		1478	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1479	}
		1480
867	static void	1481	static void
868	api_ready (SV *coro)	1482	prepare_schedule (pTHX_ struct transfer_args *ta)
869	{	1483	{
870	dTHX;	1484	SV *prev_sv, *next_sv;
871		1485
872	if (SvROK (coro))	1486	for (;;)
873	coro = SvRV (coro);	1487	{
		1488	LOCK;
		1489	next_sv = coro_deq (aTHX);
		1490
		1491	/* nothing to schedule: call the idle handler */
		1492	if (expect_false (!next_sv))
		1493	{
		1494	dSP;
		1495	UNLOCK;
		1496
		1497	ENTER;
		1498	SAVETMPS;
		1499
		1500	PUSHMARK (SP);
		1501	PUTBACK;
		1502	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1503	SPAGAIN;
		1504
		1505	FREETMPS;
		1506	LEAVE;
		1507	continue;
		1508	}
		1509
		1510	ta->next = SvSTATE (next_sv);
		1511
		1512	/* cannot transfer to destroyed coros, skip and look for next */
		1513	if (expect_false (ta->next->flags & CF_DESTROYED))
		1514	{
		1515	UNLOCK;
		1516	SvREFCNT_dec (next_sv);
		1517	/* coro_nready is already taken care of by destroy */
		1518	continue;
		1519	}
		1520
		1521	--coro_nready;
		1522	UNLOCK;
		1523	break;
		1524	}
		1525
		1526	/* free this only after the transfer */
		1527	prev_sv = SvRV (coro_current);
		1528	ta->prev = SvSTATE (prev_sv);
		1529	TRANSFER_CHECK (*ta);
		1530	assert (ta->next->flags & CF_READY);
		1531	ta->next->flags &= ~CF_READY;
		1532	SvRV_set (coro_current, next_sv);
874		1533
875	LOCK;	1534	LOCK;
876	coro_enq (SvREFCNT_inc (coro));	1535	free_coro_mortal (aTHX);
		1536	coro_mortal = prev_sv;
877	UNLOCK;	1537	UNLOCK;
878	}	1538	}
879		1539
880	static void	1540	static void
881	prepare_schedule (struct transfer_args *ta)
882	{
883	SV *current, *prev, *next;
884
885	current = GvSV (coro_current);
886
887	for (;;)
888	{
889	LOCK;
890	next = coro_deq (PRIO_MIN);
891	UNLOCK;
892
893	if (next)
894	break;
895
896	{
897	dSP;
898
899	ENTER;
900	SAVETMPS;
901
902	PUSHMARK (SP);
903	PUTBACK;
904	call_sv (GvSV (coro_idle), G_DISCARD);
905
906	FREETMPS;
907	LEAVE;
908	}
909	}
910
911	prev = SvRV (current);
912	SvRV (current) = next;
913
914	/* free this only after the transfer */
915	LOCK;
916	free_coro_mortal ();
917	UNLOCK;
918	coro_mortal = prev;
919
920	ta->prev = SvSTATE (prev);
921	ta->next = SvSTATE (next);
922	ta->flags = TRANSFER_SAVE_ALL;
923	}
924
925	static void
926	prepare_cede (struct transfer_args *ta)	1541	prepare_cede (pTHX_ struct transfer_args *ta)
927	{	1542	{
928	LOCK;	1543	api_ready (coro_current);
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930	UNLOCK;
931
932	prepare_schedule (ta);	1544	prepare_schedule (aTHX_ ta);
		1545	}
		1546
		1547	static int
		1548	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1549	{
		1550	if (coro_nready)
		1551	{
		1552	SV *prev = SvRV (coro_current);
		1553	prepare_schedule (aTHX_ ta);
		1554	api_ready (prev);
		1555	return 1;
		1556	}
		1557	else
		1558	return 0;
933	}	1559	}
934		1560
935	static void	1561	static void
936	api_schedule (void)	1562	api_schedule (void)
937	{	1563	{
938	dTHX;	1564	dTHX;
939	struct transfer_args ta;	1565	struct transfer_args ta;
940		1566
941	prepare_schedule (&ta);	1567	prepare_schedule (aTHX_ &ta);
942	TRANSFER (ta);	1568	TRANSFER (ta, 1);
943	}	1569	}
944		1570
945	static void	1571	static int
946	api_cede (void)	1572	api_cede (void)
947	{	1573	{
948	dTHX;	1574	dTHX;
949	struct transfer_args ta;	1575	struct transfer_args ta;
950		1576
951	prepare_cede (&ta);	1577	prepare_cede (aTHX_ &ta);
		1578
		1579	if (expect_true (ta.prev != ta.next))
		1580	{
952	TRANSFER (ta);	1581	TRANSFER (ta, 1);
		1582	return 1;
		1583	}
		1584	else
		1585	return 0;
953	}	1586	}
954		1587
		1588	static int
		1589	api_cede_notself (void)
		1590	{
		1591	dTHX;
		1592	struct transfer_args ta;
		1593
		1594	if (prepare_cede_notself (aTHX_ &ta))
		1595	{
		1596	TRANSFER (ta, 1);
		1597	return 1;
		1598	}
		1599	else
		1600	return 0;
		1601	}
		1602
		1603	static void
		1604	api_trace (SV *coro_sv, int flags)
		1605	{
		1606	dTHX;
		1607	struct coro *coro = SvSTATE (coro_sv);
		1608
		1609	if (flags & CC_TRACE)
		1610	{
		1611	if (!coro->cctx)
		1612	coro->cctx = cctx_new ();
		1613	else if (!(coro->cctx->flags & CC_TRACE))
		1614	croak ("cannot enable tracing on coroutine with custom stack");
		1615
		1616	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1617	}
		1618	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1619	{
		1620	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1621
		1622	if (coro->flags & CF_RUNNING)
		1623	PL_runops = RUNOPS_DEFAULT;
		1624	else
		1625	coro->slot->runops = RUNOPS_DEFAULT;
		1626	}
		1627	}
		1628
955	MODULE = Coro::State PACKAGE = Coro::State	1629	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956		1630
957	PROTOTYPES: DISABLE	1631	PROTOTYPES: DISABLE
958		1632
959	BOOT:	1633	BOOT:
960	{	1634	{
961	#ifdef USE_ITHREADS	1635	#ifdef USE_ITHREADS
962	MUTEX_INIT (&coro_mutex);	1636	MUTEX_INIT (&coro_mutex);
963	#endif	1637	#endif
964	BOOT_PAGESIZE;	1638	BOOT_PAGESIZE;
965		1639
		1640	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1641	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1642
		1643	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1644	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1645	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1646
		1647	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1648	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1649	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1650
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1651	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1652
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1653	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1654	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1655	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1656	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
971		1657
972	main_mainstack = PL_mainstack;	1658	main_mainstack = PL_mainstack;
		1659	main_top_env = PL_top_env;
973		1660
		1661	while (main_top_env->je_prev)
		1662	main_top_env = main_top_env->je_prev;
		1663
974	coroapi.ver = CORO_API_VERSION;	1664	coroapi.ver = CORO_API_VERSION;
		1665	coroapi.rev = CORO_API_REVISION;
975	coroapi.transfer = api_transfer;	1666	coroapi.transfer = api_transfer;
976		1667
977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1668	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
978	}	1669	}
979		1670
980	SV *	1671	SV *
981	new (char *klass, ...)	1672	new (char *klass, ...)
982	CODE:	1673	CODE:
983	{	1674	{
984	struct coro *coro;	1675	struct coro *coro;
		1676	MAGIC *mg;
985	HV *hv;	1677	HV *hv;
986	int i;	1678	int i;
987		1679
988	Newz (0, coro, 1, struct coro);	1680	Newz (0, coro, 1, struct coro);
989	coro->args = newAV ();	1681	coro->args = newAV ();
		1682	coro->flags = CF_NEW;
990		1683
		1684	if (coro_first) coro_first->prev = coro;
		1685	coro->next = coro_first;
		1686	coro_first = coro;
		1687
991	hv = newHV ();	1688	coro->hv = hv = newHV ();
992	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1689	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1690	mg->mg_flags |= MGf_DUP;
993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1691	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994		1692
		1693	av_extend (coro->args, items - 1);
995	for (i = 1; i < items; i++)	1694	for (i = 1; i < items; i++)
996	av_push (coro->args, newSVsv (ST (i)));	1695	av_push (coro->args, newSVsv (ST (i)));
997	}	1696	}
998	OUTPUT:	1697	OUTPUT:
999	RETVAL	1698	RETVAL
1000		1699
		1700	# these not obviously related functions are all rolled into the same xs
		1701	# function to increase chances that they all will call transfer with the same
		1702	# stack offset
1001	void	1703	void
1002	_set_stacklevel (...)	1704	_set_stacklevel (...)
1003	ALIAS:	1705	ALIAS:
1004	Coro::State::transfer = 1	1706	Coro::State::transfer = 1
1005	Coro::schedule = 2	1707	Coro::schedule = 2
1006	Coro::cede = 3	1708	Coro::cede = 3
1007	Coro::Cont::yield = 4	1709	Coro::cede_notself = 4
1008	CODE:	1710	CODE:
1009	{	1711	{
1010	struct transfer_args ta;	1712	struct transfer_args ta;
1011		1713
		1714	PUTBACK;
1012	switch (ix)	1715	switch (ix)
1013	{	1716	{
1014	case 0:	1717	case 0:
1015	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1718	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1016	ta.next = 0;	1719	ta.next = 0;
1017	ta.flags = TRANSFER_SET_STACKLEVEL;
1018	break;	1720	break;
1019		1721
1020	case 1:	1722	case 1:
1021	if (items != 3)	1723	if (items != 2)
1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1724	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1023		1725
1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1726	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1025	break;	1727	break;
1026		1728
1027	case 2:	1729	case 2:
1028	prepare_schedule (&ta);	1730	prepare_schedule (aTHX_ &ta);
1029	break;	1731	break;
1030		1732
1031	case 3:	1733	case 3:
1032	prepare_cede (&ta);	1734	prepare_cede (aTHX_ &ta);
1033	break;	1735	break;
1034		1736
1035	case 4:	1737	case 4:
1036	{	1738	if (!prepare_cede_notself (aTHX_ &ta))
1037	SV *yieldstack;	1739	XSRETURN_EMPTY;
1038	SV *sv;
1039	AV *defav = GvAV (PL_defgv);
1040		1740
1041	yieldstack = *hv_fetch (
1042	(HV *)SvRV (GvSV (coro_current)),
1043	"yieldstack", sizeof ("yieldstack") - 1,
1044	0
1045	);
1046
1047	/* set up @_ -- ugly */
1048	av_clear (defav);
1049	av_fill (defav, items - 1);
1050	while (items--)
1051	av_store (defav, items, SvREFCNT_inc (ST(items)));
1052
1053	sv = av_pop ((AV *)SvRV (yieldstack));
1054	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1055	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1056	ta.flags = 0;
1057	SvREFCNT_dec (sv);
1058	}
1059	break;	1741	break;
1060
1061	}	1742	}
		1743	SPAGAIN;
1062		1744
		1745	BARRIER;
		1746	PUTBACK;
1063	TRANSFER (ta);	1747	TRANSFER (ta, 0);
		1748	SPAGAIN; /* might be the sp of a different coroutine now */
		1749	/* be extra careful not to ever do anything after TRANSFER */
1064	}	1750	}
		1751
		1752	bool
		1753	_destroy (SV *coro_sv)
		1754	CODE:
		1755	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1756	OUTPUT:
		1757	RETVAL
1065		1758
1066	void	1759	void
1067	_clone_state_from (SV *dst, SV *src)
1068	CODE:
1069	{
1070	struct coro *coro_src = SvSTATE (src);
1071
1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1073
1074	++coro_src->refcnt;
1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1076	}
1077
1078	void
1079	_exit (code)	1760	_exit (int code)
1080	int code
1081	PROTOTYPE: $	1761	PROTOTYPE: $
1082	CODE:	1762	CODE:
1083	_exit (code);	1763	_exit (code);
		1764
		1765	int
		1766	cctx_stacksize (int new_stacksize = 0)
		1767	CODE:
		1768	RETVAL = coro_stacksize;
		1769	if (new_stacksize)
		1770	coro_stacksize = new_stacksize;
		1771	OUTPUT:
		1772	RETVAL
1084		1773
1085	int	1774	int
1086	cctx_count ()	1775	cctx_count ()
1087	CODE:	1776	CODE:
1088	RETVAL = cctx_count;	1777	RETVAL = cctx_count;
…		…
1094	CODE:	1783	CODE:
1095	RETVAL = cctx_idle;	1784	RETVAL = cctx_idle;
1096	OUTPUT:	1785	OUTPUT:
1097	RETVAL	1786	RETVAL
1098		1787
		1788	void
		1789	list ()
		1790	PPCODE:
		1791	{
		1792	struct coro *coro;
		1793	for (coro = coro_first; coro; coro = coro->next)
		1794	if (coro->hv)
		1795	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1796	}
		1797
		1798	void
		1799	call (Coro::State coro, SV *coderef)
		1800	ALIAS:
		1801	eval = 1
		1802	CODE:
		1803	{
		1804	if (coro->mainstack)
		1805	{
		1806	struct coro temp;
		1807
		1808	if (!(coro->flags & CF_RUNNING))
		1809	{
		1810	PUTBACK;
		1811	save_perl (aTHX_ &temp);
		1812	load_perl (aTHX_ coro);
		1813	}
		1814
		1815	{
		1816	dSP;
		1817	ENTER;
		1818	SAVETMPS;
		1819	PUTBACK;
		1820	PUSHSTACK;
		1821	PUSHMARK (SP);
		1822
		1823	if (ix)
		1824	eval_sv (coderef, 0);
		1825	else
		1826	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1827
		1828	POPSTACK;
		1829	SPAGAIN;
		1830	FREETMPS;
		1831	LEAVE;
		1832	PUTBACK;
		1833	}
		1834
		1835	if (!(coro->flags & CF_RUNNING))
		1836	{
		1837	save_perl (aTHX_ coro);
		1838	load_perl (aTHX_ &temp);
		1839	SPAGAIN;
		1840	}
		1841	}
		1842	}
		1843
		1844	SV *
		1845	is_ready (Coro::State coro)
		1846	PROTOTYPE: $
		1847	ALIAS:
		1848	is_ready = CF_READY
		1849	is_running = CF_RUNNING
		1850	is_new = CF_NEW
		1851	is_destroyed = CF_DESTROYED
		1852	CODE:
		1853	RETVAL = boolSV (coro->flags & ix);
		1854	OUTPUT:
		1855	RETVAL
		1856
		1857	void
		1858	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1859
		1860	SV *
		1861	has_cctx (Coro::State coro)
		1862	PROTOTYPE: $
		1863	CODE:
		1864	RETVAL = boolSV (!!coro->cctx);
		1865	OUTPUT:
		1866	RETVAL
		1867
		1868	int
		1869	is_traced (Coro::State coro)
		1870	PROTOTYPE: $
		1871	CODE:
		1872	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1873	OUTPUT:
		1874	RETVAL
		1875
		1876	IV
		1877	rss (Coro::State coro)
		1878	PROTOTYPE: $
		1879	ALIAS:
		1880	usecount = 1
		1881	CODE:
		1882	switch (ix)
		1883	{
		1884	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1885	case 1: RETVAL = coro->usecount; break;
		1886	}
		1887	OUTPUT:
		1888	RETVAL
		1889
		1890	void
		1891	force_cctx ()
		1892	CODE:
		1893	struct coro *coro = SvSTATE (coro_current);
		1894	coro->cctx->idle_sp = 0;
		1895
1099	MODULE = Coro::State PACKAGE = Coro	1896	MODULE = Coro::State PACKAGE = Coro
1100		1897
1101	BOOT:	1898	BOOT:
1102	{	1899	{
1103	int i;	1900	int i;
1104		1901
		1902	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1903	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1904	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1905
		1906	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1907	SvREADONLY_on (coro_current);
		1908
1105	coro_stash = gv_stashpv ("Coro", TRUE);	1909	coro_stash = gv_stashpv ("Coro", TRUE);
1106		1910
1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1911	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1912	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1913	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1914	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1915	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1916	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1113		1917
1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1116
1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1918	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1118	coro_ready[i] = newAV ();	1919	coro_ready[i] = newAV ();
1119		1920
1120	{	1921	{
1121	SV *sv = perl_get_sv("Coro::API", 1);	1922	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1923	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1122		1924
1123	coroapi.schedule = api_schedule;	1925	coroapi.schedule = api_schedule;
1124	coroapi.cede = api_cede;	1926	coroapi.cede = api_cede;
		1927	coroapi.cede_notself = api_cede_notself;
1125	coroapi.ready = api_ready;	1928	coroapi.ready = api_ready;
		1929	coroapi.is_ready = api_is_ready;
1126	coroapi.nready = &coro_nready;	1930	coroapi.nready = &coro_nready;
1127	coroapi.current = coro_current;	1931	coroapi.current = coro_current;
1128		1932
1129	GCoroAPI = &coroapi;	1933	GCoroAPI = &coroapi;
1130	sv_setiv (sv, (IV)&coroapi);	1934	sv_setiv (sv, (IV)&coroapi);
1131	SvREADONLY_on (sv);	1935	SvREADONLY_on (sv);
1132	}	1936	}
1133	}	1937	}
		1938
		1939	void
		1940	_set_current (SV *current)
		1941	PROTOTYPE: $
		1942	CODE:
		1943	SvREFCNT_dec (SvRV (coro_current));
		1944	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1945
		1946	void
		1947	_set_readyhook (SV *hook)
		1948	PROTOTYPE: $
		1949	CODE:
		1950	LOCK;
		1951	SvREFCNT_dec (coro_readyhook);
		1952	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1953	UNLOCK;
1134		1954
1135	int	1955	int
1136	prio (Coro::State coro, int newprio = 0)	1956	prio (Coro::State coro, int newprio = 0)
1137	ALIAS:	1957	ALIAS:
1138	nice = 1	1958	nice = 1
…		…
1141	RETVAL = coro->prio;	1961	RETVAL = coro->prio;
1142		1962
1143	if (items > 1)	1963	if (items > 1)
1144	{	1964	{
1145	if (ix)	1965	if (ix)
1146	newprio += coro->prio;	1966	newprio = coro->prio - newprio;
1147		1967
1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1968	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1969	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1150		1970
1151	coro->prio = newprio;	1971	coro->prio = newprio;
1152	}	1972	}
1153	}	1973	}
		1974	OUTPUT:
		1975	RETVAL
1154		1976
1155	void	1977	SV *
1156	ready (SV *self)	1978	ready (SV *self)
1157	PROTOTYPE: $	1979	PROTOTYPE: $
1158	CODE:	1980	CODE:
1159	api_ready (self);	1981	RETVAL = boolSV (api_ready (self));
		1982	OUTPUT:
		1983	RETVAL
1160		1984
1161	int	1985	int
1162	nready (...)	1986	nready (...)
1163	PROTOTYPE:	1987	PROTOTYPE:
1164	CODE:	1988	CODE:
1165	RETVAL = coro_nready;	1989	RETVAL = coro_nready;
1166	OUTPUT:	1990	OUTPUT:
1167	RETVAL	1991	RETVAL
1168		1992
		1993	void
		1994	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1995	PROTOTYPE: $;$
		1996	CODE:
		1997	SvREFCNT_dec (self->throw);
		1998	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1999
		2000	void
		2001	swap_defsv (Coro::State self)
		2002	PROTOTYPE: $
		2003	ALIAS:
		2004	swap_defav = 1
		2005	CODE:
		2006	if (!self->slot)
		2007	croak ("cannot swap state with coroutine that has no saved state");
		2008	else
		2009	{
		2010	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		2011	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		2012
		2013	SV *tmp = *src; *src = *dst; *dst = tmp;
		2014	}
		2015
		2016	# for async_pool speedup
		2017	void
		2018	_pool_1 (SV *cb)
		2019	CODE:
		2020	{
		2021	struct coro *coro = SvSTATE (coro_current);
		2022	HV *hv = (HV *)SvRV (coro_current);
		2023	AV *defav = GvAV (PL_defgv);
		2024	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2025	AV *invoke_av;
		2026	int i, len;
		2027
		2028	if (!invoke)
		2029	{
		2030	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		2031	croak ("\3async_pool terminate\2\n");
		2032	}
		2033
		2034	SvREFCNT_dec (coro->saved_deffh);
		2035	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2036
		2037	hv_store (hv, "desc", sizeof ("desc") - 1,
		2038	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2039
		2040	invoke_av = (AV *)SvRV (invoke);
		2041	len = av_len (invoke_av);
		2042
		2043	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2044
		2045	if (len > 0)
		2046	{
		2047	av_fill (defav, len - 1);
		2048	for (i = 0; i < len; ++i)
		2049	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2050	}
		2051
		2052	SvREFCNT_dec (invoke);
		2053	}
		2054
		2055	void
		2056	_pool_2 (SV *cb)
		2057	CODE:
		2058	{
		2059	struct coro *coro = SvSTATE (coro_current);
		2060
		2061	sv_setsv (cb, &PL_sv_undef);
		2062
		2063	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		2064	coro->saved_deffh = 0;
		2065
		2066	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2067	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2068	{
		2069	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		2070	croak ("\3async_pool terminate\2\n");
		2071	}
		2072
		2073	av_clear (GvAV (PL_defgv));
		2074	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2075	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2076
		2077	coro->prio = 0;
		2078
		2079	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2080	api_trace (coro_current, 0);
		2081
		2082	av_push (av_async_pool, newSVsv (coro_current));
		2083	}
		2084
		2085
1169	MODULE = Coro::State PACKAGE = Coro::AIO	2086	MODULE = Coro::State PACKAGE = Coro::AIO
1170		2087
1171	SV *	2088	SV *
1172	_get_state ()	2089	_get_state ()
1173	CODE:	2090	CODE:
1174	{	2091	{
1175	struct {	2092	struct io_state *data;
1176	int errorno;
1177	int laststype;
1178	int laststatval;
1179	Stat_t statcache;
1180	} data;
1181		2093
		2094	RETVAL = newSV (sizeof (struct io_state));
		2095	data = (struct io_state *)SvPVX (RETVAL);
		2096	SvCUR_set (RETVAL, sizeof (struct io_state));
		2097	SvPOK_only (RETVAL);
		2098
1182	data.errorno = errno;	2099	data->errorno = errno;
1183	data.laststype = PL_laststype;	2100	data->laststype = PL_laststype;
1184	data.laststatval = PL_laststatval;	2101	data->laststatval = PL_laststatval;
1185	data.statcache = PL_statcache;	2102	data->statcache = PL_statcache;
1186
1187	RETVAL = newSVpvn ((char *)&data, sizeof data);
1188	}	2103	}
1189	OUTPUT:	2104	OUTPUT:
1190	RETVAL	2105	RETVAL
1191		2106
1192	void	2107	void
1193	_set_state (char *data_)	2108	_set_state (char *data_)
1194	PROTOTYPE: $	2109	PROTOTYPE: $
1195	CODE:	2110	CODE:
1196	{	2111	{
1197	struct {	2112	struct io_state *data = (void *)data_;
1198	int errorno;
1199	int laststype;
1200	int laststatval;
1201	Stat_t statcache;
1202	} *data = (void *)data_;
1203		2113
1204	errno = data->errorno;	2114	errno = data->errorno;
1205	PL_laststype = data->laststype;	2115	PL_laststype = data->laststype;
1206	PL_laststatval = data->laststatval;	2116	PL_laststatval = data->laststatval;
1207	PL_statcache = data->statcache;	2117	PL_statcache = data->statcache;
1208	}	2118	}
		2119
		2120
		2121	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2122
		2123	BOOT:
		2124	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2125
		2126	SV *
		2127	_schedule (...)
		2128	PROTOTYPE: @
		2129	CODE:
		2130	{
		2131	static int incede;
		2132
		2133	api_cede_notself ();
		2134
		2135	++incede;
		2136	while (coro_nready >= incede && api_cede ())
		2137	;
		2138
		2139	sv_setsv (sv_activity, &PL_sv_undef);
		2140	if (coro_nready >= incede)
		2141	{
		2142	PUSHMARK (SP);
		2143	PUTBACK;
		2144	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
		2145	SPAGAIN;
		2146	}
		2147
		2148	--incede;
		2149	}
		2150

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