[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC vs.
Revision 1.243 by root, Sat Aug 30 03:07:46 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	};
218		376
219	#define CORO_MAGIC(cv) \	377	#define CORO_MAGIC(sv,type) \
220	SvMAGIC (cv) \	378	SvMAGIC (sv) \
221	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	379	? SvMAGIC (sv)->mg_type == type \
222	? SvMAGIC (cv) \	380	? SvMAGIC (sv) \
223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	381	: mg_find (sv, type) \
224	: 0	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))
225		412
226	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
227	static void	414	static void
228	get_padlist (CV *cv)	415	get_padlist (pTHX_ CV *cv)
229	{	416	{
230	MAGIC *mg = CORO_MAGIC (cv);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
231	AV *av;	418	AV *av;
232		419
233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	422	else
236	{	423	{
237	#if 0	424	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this is probably cleaner, but also slower? */	425	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (cv);	426	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	427	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	428	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	429	SvREFCNT_dec (cp);
243	#else	430	#else
244	CvPADLIST (cv) = coro_clone_padlist (cv);	431	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
245	#endif	432	#endif
246	}	433	}
247	}	434	}
248		435
249	static void	436	static void
250	put_padlist (CV *cv)	437	put_padlist (pTHX_ CV *cv)
251	{	438	{
252	MAGIC *mg = CORO_MAGIC (cv);	439	MAGIC *mg = CORO_MAGIC_cv (cv);
253	AV *av;	440	AV *av;
254		441
255	if (!mg)	442	if (expect_false (!mg))
256	{	443	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();
261	}
262		444
263	av = (AV *)mg->mg_obj;	445	av = (AV *)mg->mg_obj;
264		446
265	if (AvFILLp (av) >= AvMAX (av))	447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
266	av_extend (av, AvMAX (av) + 1);	448	av_extend (av, AvMAX (av) + 1);
267		449
268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	451	}
270		452
271	#define SB do {	453	/ load & save, init *****************************************************/
272	#define SE } while (0)
273
274	#define LOAD(state) load_state((state));
275	#define SAVE(state,flags) save_state((state),(flags));
276
277	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
278		454
279	static void	455	static void
280	load_state(Coro__State c)	456	load_perl (pTHX_ Coro__State c)
281	{	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
282	#define VAR(name,type) PL_ ## name = c->name;	468	#define VAR(name,type) PL_ ## name = slot->name;
283	# include "state.h"	469	# include "state.h"
284	#undef VAR	470	#undef VAR
285
286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
289		471
290	{	472	{
291	dSP;	473	dSP;
		474
292	CV *cv;	475	CV *cv;
293		476
294	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
295	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
296	{	479	{
297	put_padlist (cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
298	CvDEPTH (cv) = PTR2IV (POPs);	481	CvDEPTH (cv) = PTR2IV (POPs);
299	CvPADLIST (cv) = (AV *)POPs;	482	CvPADLIST (cv) = (AV *)POPs;
300	}	483	}
301		484
302	PUTBACK;	485	PUTBACK;
303	}	486	}
304	}	487	}
305		488
306	static void	489	static void
307	save_state(Coro__State c, int flags)	490	save_perl (pTHX_ Coro__State c)
308	{	491	{
309	{	492	{
310	dSP;	493	dSP;
311	I32 cxix = cxstack_ix;	494	I32 cxix = cxstack_ix;
312	PERL_CONTEXT *ccstk = cxstack;	495	PERL_CONTEXT *ccstk = cxstack;
…		…
315	/*	498	/*
316	* 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
317	* (and reinitialize) all cv's in the whole callchain :(	500	* (and reinitialize) all cv's in the whole callchain :(
318	*/	501	*/
319		502
320	PUSHs (Nullsv);	503	XPUSHs (Nullsv);
321	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
322	for (;;)	505	for (;;)
323	{	506	{
324	while (cxix >= 0)	507	while (expect_true (cxix >= 0))
325	{	508	{
326	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
327		510
328	if (CxTYPE(cx) == CXt_SUB)	511	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
329	{	512	{
330	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
331		514
332	if (CvDEPTH (cv))	515	if (expect_true (CvDEPTH (cv)))
333	{	516	{
334	EXTEND (SP, 3);	517	EXTEND (SP, 3);
335
336	PUSHs ((SV *)CvPADLIST(cv));	518	PUSHs ((SV *)CvPADLIST (cv));
337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
338	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
339		521
340	CvDEPTH (cv) = 0;	522	CvDEPTH (cv) = 0;
341	get_padlist (cv);	523	get_padlist (aTHX_ cv);
342	}	524	}
343	}	525	}
344	#ifdef CXt_FORMAT
345	else if (CxTYPE(cx) == CXt_FORMAT)
346	{
347	/* I never used formats, so how should I know how these are implemented? */
348	/* my bold guess is as a simple, plain sub... */
349	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
350	}
351	#endif
352	}	526	}
353		527
354	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
355	break;	529	break;
356		530
357	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
358	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
359	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
360	}	534	}
361		535
362	PUTBACK;	536	PUTBACK;
363	}	537	}
364		538
365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	539	/* allocate some space on the context stack for our purposes */
366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
367	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 */
368		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
369	#define VAR(name,type)c->name = PL_ ## name;	561	#define VAR(name,type) slot->name = PL_ ## name;
370	# include "state.h"	562	# include "state.h"
371	#undef VAR	563	#undef VAR
		564	}
372	}	565	}
373		566
374	/*	567	/*
375	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
376	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
377	* on the (sometimes correct) assumption that coroutines do	570	* on the (sometimes correct) assumption that coroutines do
378	* not usually need a lot of stackspace.	571	* not usually need a lot of stackspace.
379	*/	572	*/
		573	#if CORO_PREFER_PERL_FUNCTIONS
		574	# define coro_init_stacks init_stacks
		575	#else
380	static void	576	static void
381	coro_init_stacks ()	577	coro_init_stacks (pTHX)
382	{	578	{
383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	579	PL_curstackinfo = new_stackinfo(32, 8);
384	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
385	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
387		583
388	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
389	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
390	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
391		587
392	New(50,PL_tmps_stack,96,SV*);	588	New(50,PL_tmps_stack,32,SV*);
393	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
394	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
395	PL_tmps_max = 96;	591	PL_tmps_max = 32;
396		592
397	New(54,PL_markstack,16,I32);	593	New(54,PL_markstack,16,I32);
398	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
399	PL_markstack_max = PL_markstack + 16;	595	PL_markstack_max = PL_markstack + 16;
400		596
401	#ifdef SET_MARK_OFFSET	597	#ifdef SET_MARK_OFFSET
402	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
403	#endif	599	#endif
404		600
405	New(54,PL_scopestack,16,I32);	601	New(54,PL_scopestack,8,I32);
406	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
407	PL_scopestack_max = 16;	603	PL_scopestack_max = 8;
408		604
409	New(54,PL_savestack,96,ANY);	605	New(54,PL_savestack,24,ANY);
410	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
411	PL_savestack_max = 96;	607	PL_savestack_max = 24;
412		608
413	#if !PERL_VERSION_ATLEAST (5,9,0)	609	#if !PERL_VERSION_ATLEAST (5,10,0)
414	New(54,PL_retstack,8,OP*);	610	New(54,PL_retstack,4,OP*);
415	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
416	PL_retstack_max = 8;	612	PL_retstack_max = 4;
417	#endif	613	#endif
418	}	614	}
		615	#endif
419		616
420	/*	617	/*
421	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
422	*/	619	*/
423	static void	620	static void
424	coro_destroy_stacks ()	621	coro_destroy_stacks (pTHX)
425	{	622	{
426	if (!IN_DESTRUCT)
427	{
428	/* is this ugly, I ask? */
429	LEAVE_SCOPE (0);
430
431	/* sure it is, but more important: is it correct?? :/ */
432	FREETMPS;
433
434	/POPSTACK_TO (PL_mainstack);//D//use/
435	}
436
437	while (PL_curstackinfo->si_next)	623	while (PL_curstackinfo->si_next)
438	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
439		625
440	while (PL_curstackinfo)	626	while (PL_curstackinfo)
441	{	627	{
442	PERL_SI *p = PL_curstackinfo->si_prev;	628	PERL_SI *p = PL_curstackinfo->si_prev;
443		629
444	{ /D//remove/
445	dSP;
446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
447	PUTBACK; /* possibly superfluous */
448	}
449
450	if (!IN_DESTRUCT)	630	if (!IN_DESTRUCT)
451	{
452	dounwind (-1);/D//remove/
453	SvREFCNT_dec (PL_curstackinfo->si_stack);	631	SvREFCNT_dec (PL_curstackinfo->si_stack);
454	}
455		632
456	Safefree (PL_curstackinfo->si_cxstack);	633	Safefree (PL_curstackinfo->si_cxstack);
457	Safefree (PL_curstackinfo);	634	Safefree (PL_curstackinfo);
458	PL_curstackinfo = p;	635	PL_curstackinfo = p;
459	}	636	}
460		637
461	Safefree (PL_tmps_stack);	638	Safefree (PL_tmps_stack);
462	Safefree (PL_markstack);	639	Safefree (PL_markstack);
463	Safefree (PL_scopestack);	640	Safefree (PL_scopestack);
464	Safefree (PL_savestack);	641	Safefree (PL_savestack);
465	#if !PERL_VERSION_ATLEAST (5,9,0)	642	#if !PERL_VERSION_ATLEAST (5,10,0)
466	Safefree (PL_retstack);	643	Safefree (PL_retstack);
467	#endif	644	#endif
468	}	645	}
469		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	#ifndef MgPV_nolen_const
		692	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		693	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
		694	(const char*)(mg)->mg_ptr)
		695	#endif
		696
		697	/*
		698	* This overrides the default magic get method of %SIG elements.
		699	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		700	* and instead of tryign to save and restore the hash elements, we just provide
		701	* readback here.
		702	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		703	* not expecting this to actually change the hook. This is a potential problem
		704	* when a schedule happens then, but we ignore this.
		705	*/
		706	static int
		707	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		708	{
		709	const char *s = MgPV_nolen_const (mg);
		710
		711	if (*s == '_')
		712	{
		713	SV **svp = 0;
		714
		715	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		716	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		717
		718	if (svp)
		719	{
		720	sv_setsv (sv, svp ? svp : &PL_sv_undef);
		721	return 0;
		722	}
		723	}
		724
		725	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		726	}
		727
		728	static int
		729	coro_sigelem_clr (pTHX_ SV sv, MAGIC mg)
		730	{
		731	const char *s = MgPV_nolen_const (mg);
		732
		733	if (*s == '_')
		734	{
		735	SV **svp = 0;
		736
		737	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		738	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		739
		740	if (svp)
		741	{
		742	SV old = svp;
		743	*svp = 0;
		744	SvREFCNT_dec (old);
		745	return 0;
		746	}
		747	}
		748
		749	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		750	}
		751
		752	static int
		753	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		754	{
		755	const char *s = MgPV_nolen_const (mg);
		756
		757	if (*s == '_')
		758	{
		759	SV **svp = 0;
		760
		761	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		762	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		763
		764	if (svp)
		765	{
		766	SV old = svp;
		767	*svp = newSVsv (sv);
		768	SvREFCNT_dec (old);
		769	return 0;
		770	}
		771	}
		772
		773	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		774	}
		775
470	static void	776	static void
471	setup_coro (struct coro *coro)	777	coro_setup (pTHX_ struct coro *coro)
472	{	778	{
473	/*	779	/*
474	* emulate part of the perl startup here.	780	* emulate part of the perl startup here.
475	*/	781	*/
476
477	coro_init_stacks ();	782	coro_init_stacks (aTHX);
478		783
		784	PL_runops = RUNOPS_DEFAULT;
		785	PL_curcop = &PL_compiling;
		786	PL_in_eval = EVAL_NULL;
479	PL_curcop = 0;	787	PL_comppad = 0;
480	PL_in_eval = 0;
481	PL_curpm = 0;	788	PL_curpm = 0;
		789	PL_curpad = 0;
		790	PL_localizing = 0;
		791	PL_dirty = 0;
		792	PL_restartop = 0;
		793	#if PERL_VERSION_ATLEAST (5,10,0)
		794	PL_parser = 0;
		795	#endif
		796
		797	/* recreate the die/warn hooks */
		798	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		799	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		800
		801	GvSV (PL_defgv) = newSV (0);
		802	GvAV (PL_defgv) = coro->args; coro->args = 0;
		803	GvSV (PL_errgv) = newSV (0);
		804	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		805	PL_rs = newSVsv (GvSV (irsgv));
		806	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
482		807
483	{	808	{
484	dSP;	809	dSP;
485	LOGOP myop;	810	LOGOP myop;
486		811
487	/* I have no idea why this is needed, but it is */
488	PUSHMARK (SP);
489
490	SvREFCNT_dec (GvAV (PL_defgv));
491	GvAV (PL_defgv) = coro->args; coro->args = 0;
492
493	Zero (&myop, 1, LOGOP);	812	Zero (&myop, 1, LOGOP);
494	myop.op_next = Nullop;	813	myop.op_next = Nullop;
495	myop.op_flags = OPf_WANT_VOID;	814	myop.op_flags = OPf_WANT_VOID;
496		815
		816	PUSHMARK (SP);
		817	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		818	PUTBACK;
497	PL_op = (OP *)&myop;	819	PL_op = (OP *)&myop;
498
499	PUSHMARK (SP);
500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
501	PUTBACK;
502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
503	SPAGAIN;	821	SPAGAIN;
504
505	ENTER; /* necessary e.g. for dounwind */
506	}	822	}
		823
		824	/* this newly created coroutine might be run on an existing cctx which most
		825	* likely was suspended in set_stacklevel, called from entersub.
		826	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		827	* so we ENTER here for symmetry
		828	*/
		829	ENTER;
507	}	830	}
508		831
509	static void	832	static void
		833	coro_destroy (pTHX_ struct coro *coro)
		834	{
		835	if (!IN_DESTRUCT)
		836	{
		837	/* restore all saved variables and stuff */
		838	LEAVE_SCOPE (0);
		839	assert (PL_tmps_floor == -1);
		840
		841	/* free all temporaries */
		842	FREETMPS;
		843	assert (PL_tmps_ix == -1);
		844
		845	/* unwind all extra stacks */
		846	POPSTACK_TO (PL_mainstack);
		847
		848	/* unwind main stack */
		849	dounwind (-1);
		850	}
		851
		852	SvREFCNT_dec (GvSV (PL_defgv));
		853	SvREFCNT_dec (GvAV (PL_defgv));
		854	SvREFCNT_dec (GvSV (PL_errgv));
		855	SvREFCNT_dec (PL_defoutgv);
		856	SvREFCNT_dec (PL_rs);
		857	SvREFCNT_dec (GvSV (irsgv));
		858
		859	SvREFCNT_dec (PL_diehook);
		860	SvREFCNT_dec (PL_warnhook);
		861
		862	SvREFCNT_dec (coro->saved_deffh);
		863	SvREFCNT_dec (coro->throw);
		864
		865	coro_destroy_stacks (aTHX);
		866	}
		867
		868	static void
510	free_coro_mortal ()	869	free_coro_mortal (pTHX)
511	{	870	{
512	if (coro_mortal)	871	if (expect_true (coro_mortal))
513	{	872	{
514	SvREFCNT_dec (coro_mortal);	873	SvREFCNT_dec (coro_mortal);
515	coro_mortal = 0;	874	coro_mortal = 0;
516	}	875	}
517	}	876	}
518		877
		878	static int
		879	runops_trace (pTHX)
		880	{
		881	COP *oldcop = 0;
		882	int oldcxix = -2;
		883	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		884	coro_cctx *cctx = coro->cctx;
		885
		886	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		887	{
		888	PERL_ASYNC_CHECK ();
		889
		890	if (cctx->flags & CC_TRACE_ALL)
		891	{
		892	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		893	{
		894	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		895	SV bot, top;
		896	AV av = newAV (); / return values */
		897	SV **cb;
		898	dSP;
		899
		900	GV *gv = CvGV (cx->blk_sub.cv);
		901	SV *fullname = sv_2mortal (newSV (0));
		902	if (isGV (gv))
		903	gv_efullname3 (fullname, gv, 0);
		904
		905	bot = PL_stack_base + cx->blk_oldsp + 1;
		906	top = cx->blk_gimme == G_ARRAY ? SP + 1
		907	: cx->blk_gimme == G_SCALAR ? bot + 1
		908	: bot;
		909
		910	av_extend (av, top - bot);
		911	while (bot < top)
		912	av_push (av, SvREFCNT_inc (*bot++));
		913
		914	PL_runops = RUNOPS_DEFAULT;
		915	ENTER;
		916	SAVETMPS;
		917	EXTEND (SP, 3);
		918	PUSHMARK (SP);
		919	PUSHs (&PL_sv_no);
		920	PUSHs (fullname);
		921	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		922	PUTBACK;
		923	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		924	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		925	SPAGAIN;
		926	FREETMPS;
		927	LEAVE;
		928	PL_runops = runops_trace;
		929	}
		930
		931	if (oldcop != PL_curcop)
		932	{
		933	oldcop = PL_curcop;
		934
		935	if (PL_curcop != &PL_compiling)
		936	{
		937	SV **cb;
		938
		939	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		940	{
		941	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		942
		943	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		944	{
		945	runops_proc_t old_runops = PL_runops;
		946	dSP;
		947	GV *gv = CvGV (cx->blk_sub.cv);
		948	SV *fullname = sv_2mortal (newSV (0));
		949
		950	if (isGV (gv))
		951	gv_efullname3 (fullname, gv, 0);
		952
		953	PL_runops = RUNOPS_DEFAULT;
		954	ENTER;
		955	SAVETMPS;
		956	EXTEND (SP, 3);
		957	PUSHMARK (SP);
		958	PUSHs (&PL_sv_yes);
		959	PUSHs (fullname);
		960	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		961	PUTBACK;
		962	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		963	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		964	SPAGAIN;
		965	FREETMPS;
		966	LEAVE;
		967	PL_runops = runops_trace;
		968	}
		969
		970	oldcxix = cxstack_ix;
		971	}
		972
		973	if (cctx->flags & CC_TRACE_LINE)
		974	{
		975	dSP;
		976
		977	PL_runops = RUNOPS_DEFAULT;
		978	ENTER;
		979	SAVETMPS;
		980	EXTEND (SP, 3);
		981	PL_runops = RUNOPS_DEFAULT;
		982	PUSHMARK (SP);
		983	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		984	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		985	PUTBACK;
		986	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		987	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		988	SPAGAIN;
		989	FREETMPS;
		990	LEAVE;
		991	PL_runops = runops_trace;
		992	}
		993	}
		994	}
		995	}
		996	}
		997
		998	TAINT_NOT;
		999	return 0;
		1000	}
		1001
		1002	/* inject a fake call to Coro::State::_cctx_init into the execution */
		1003	/* _cctx_init should be careful, as it could be called at almost any time */
		1004	/* during execution of a perl program */
519	static void NOINLINE	1005	static void NOINLINE
520	prepare_cctx (coro_cctx *cctx)	1006	cctx_prepare (pTHX_ coro_cctx *cctx)
521	{	1007	{
522	dSP;	1008	dSP;
523	LOGOP myop;	1009	LOGOP myop;
524		1010
		1011	PL_top_env = &PL_start_env;
		1012
		1013	if (cctx->flags & CC_TRACE)
		1014	PL_runops = runops_trace;
		1015
525	Zero (&myop, 1, LOGOP);	1016	Zero (&myop, 1, LOGOP);
526	myop.op_next = PL_op;	1017	myop.op_next = PL_op;
527	myop.op_flags = OPf_WANT_VOID;	1018	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
528
529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530		1019
531	PUSHMARK (SP);	1020	PUSHMARK (SP);
		1021	EXTEND (SP, 2);
		1022	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1023	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533	PUTBACK;	1024	PUTBACK;
		1025	PL_op = (OP *)&myop;
534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	1026	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535	SPAGAIN;	1027	SPAGAIN;
536	}	1028	}
537		1029
		1030	/*
		1031	* this is a _very_ stripped down perl interpreter ;)
		1032	*/
538	static void	1033	static void
539	coro_run (void *arg)	1034	cctx_run (void *arg)
540	{	1035	{
		1036	dTHX;
		1037
541	/* coro_run is the alternative epilogue of transfer() */	1038	/* cctx_run is the alternative tail of transfer(), so unlock here. */
542	UNLOCK;	1039	UNLOCK;
543		1040
		1041	/* we now skip the entersub that lead to transfer() */
		1042	PL_op = PL_op->op_next;
		1043
		1044	/* inject a fake subroutine call to cctx_init */
		1045	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1046
		1047	/* somebody or something will hit me for both perl_run and PL_restartop */
		1048	PL_restartop = PL_op;
		1049	perl_run (PL_curinterp);
		1050
544	/*	1051	/*
545	* this is a _very_ stripped down perl interpreter ;)	1052	* If perl-run returns we assume exit() was being called or the coro
		1053	* fell off the end, which seems to be the only valid (non-bug)
		1054	* reason for perl_run to return. We try to exit by jumping to the
		1055	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1056	* coroutine as Coro has no such concept
546	*/	1057	*/
547	PL_top_env = &PL_start_env;	1058	PL_top_env = main_top_env;
548		1059	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
549	/* inject call to cctx_init */
550	prepare_cctx ((coro_cctx *)arg);
551
552	/* somebody will hit me for both perl_run and PL_restartop */
553	perl_run (PL_curinterp);
554
555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
556	abort ();
557	}	1060	}
558		1061
559	static coro_cctx *	1062	static coro_cctx *
560	cctx_new ()	1063	cctx_new ()
561	{	1064	{
562	coro_cctx *cctx;	1065	coro_cctx *cctx;
		1066	void *stack_start;
		1067	size_t stack_size;
563		1068
564	++cctx_count;	1069	++cctx_count;
565		1070
566	New (0, cctx, 1, coro_cctx);	1071	Newz (0, cctx, 1, coro_cctx);
567		1072
568	#if HAVE_MMAP	1073	#if HAVE_MMAP
569
570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1074	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
571	/* mmap suppsedly does allocate-on-write for us */	1075	/* mmap supposedly does allocate-on-write for us */
572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1076	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
573		1077
574	if (cctx->sptr == (void *)-1)	1078	if (cctx->sptr != (void *)-1)
575	{
576	perror ("FATAL: unable to mmap stack for coroutine");
577	_exit (EXIT_FAILURE);
578	}	1079	{
579
580	# if STACKGUARD	1080	# if CORO_STACKGUARD
581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1081	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
582	# endif	1082	# endif
		1083	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1084	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1085	cctx->flags \|= CC_MAPPED;
		1086	}
		1087	else
		1088	#endif
		1089	{
		1090	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1091	New (0, cctx->sptr, coro_stacksize, long);
583		1092
584	#else
585
586	cctx->ssize = STACKSIZE * (long)sizeof (long);
587	New (0, cctx->sptr, STACKSIZE, long);
588
589	if (!cctx->sptr)	1093	if (!cctx->sptr)
590	{	1094	{
591	perror ("FATAL: unable to malloc stack for coroutine");	1095	perror ("FATAL: unable to allocate stack for coroutine");
592	_exit (EXIT_FAILURE);	1096	_exit (EXIT_FAILURE);
593	}	1097	}
594		1098
595	#endif	1099	stack_start = cctx->sptr;
		1100	stack_size = cctx->ssize;
		1101	}
596		1102
597	#if USE_VALGRIND	1103	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1104	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
600	cctx->ssize + (char *)cctx->sptr
601	);
602	#endif
603
604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
605		1105
606	return cctx;	1106	return cctx;
607	}	1107	}
608		1108
609	static void	1109	static void
610	cctx_free (coro_cctx *cctx)	1110	cctx_destroy (coro_cctx *cctx)
611	{	1111	{
612	if (!cctx)	1112	if (!cctx)
613	return;	1113	return;
614		1114
615	--cctx_count;	1115	--cctx_count;
616		1116
617	#if USE_VALGRIND	1117	#if CORO_USE_VALGRIND
618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1118	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619	#endif	1119	#endif
620		1120
621	#if HAVE_MMAP	1121	#if HAVE_MMAP
		1122	if (cctx->flags & CC_MAPPED)
622	munmap (cctx->sptr, cctx->ssize);	1123	munmap (cctx->sptr, cctx->ssize);
623	#else	1124	else
		1125	#endif
624	Safefree (cctx->sptr);	1126	Safefree (cctx->sptr);
625	#endif
626		1127
627	Safefree (cctx);	1128	Safefree (cctx);
628	}	1129	}
629		1130
		1131	/* wether this cctx should be destructed */
		1132	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1133
630	static coro_cctx *	1134	static coro_cctx *
631	cctx_get ()	1135	cctx_get (pTHX)
632	{	1136	{
633	coro_cctx *cctx;	1137	while (expect_true (cctx_first))
634
635	if (cctx_first)
636	{	1138	{
		1139	coro_cctx *cctx = cctx_first;
		1140	cctx_first = cctx->next;
637	--cctx_idle;	1141	--cctx_idle;
638	cctx = cctx_first;	1142
639	cctx_first = cctx->next;	1143	if (expect_true (!CCTX_EXPIRED (cctx)))
640	}	1144	return cctx;
641	else	1145
642	{	1146	cctx_destroy (cctx);
643	cctx = cctx_new ();
644	PL_op = PL_op->op_next;
645	}	1147	}
646		1148
647	return cctx;	1149	return cctx_new ();
648	}	1150	}
649		1151
650	static void	1152	static void
651	cctx_put (coro_cctx *cctx)	1153	cctx_put (coro_cctx *cctx)
652	{	1154	{
		1155	/* free another cctx if overlimit */
		1156	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1157	{
		1158	coro_cctx *first = cctx_first;
		1159	cctx_first = first->next;
		1160	--cctx_idle;
		1161
		1162	cctx_destroy (first);
		1163	}
		1164
653	++cctx_idle;	1165	++cctx_idle;
654	cctx->next = cctx_first;	1166	cctx->next = cctx_first;
655	cctx_first = cctx;	1167	cctx_first = cctx;
656	}	1168	}
657		1169
658	/* never call directly, always through the coro_state_transfer global variable */	1170	/ coroutine switching ***************************************************/
		1171
		1172	static void
		1173	transfer_check (pTHX_ struct coro prev, struct coro next)
		1174	{
		1175	if (expect_true (prev != next))
		1176	{
		1177	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1178	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1179
		1180	if (expect_false (next->flags & CF_RUNNING))
		1181	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1182
		1183	if (expect_false (next->flags & CF_DESTROYED))
		1184	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1185
		1186	#if !PERL_VERSION_ATLEAST (5,10,0)
		1187	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1188	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1189	#endif
		1190	}
		1191	}
		1192
		1193	/* always use the TRANSFER macro */
659	static void NOINLINE	1194	static void NOINLINE
660	transfer (struct coro prev, struct coro next, int flags)	1195	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
661	{	1196	{
662	dSTACKLEVEL;	1197	dSTACKLEVEL;
		1198	static volatile int has_throw;
663		1199
664	/* sometimes transfer is only called to set idle_sp */	1200	/* sometimes transfer is only called to set idle_sp */
665	if (flags == TRANSFER_SET_STACKLEVEL)	1201	if (expect_false (!next))
		1202	{
666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1203	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1204	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1205	}
667	else if (prev != next)	1206	else if (expect_true (prev != next))
668	{	1207	{
669	coro_cctx *prev__cctx;	1208	coro_cctx *prev__cctx;
670		1209
		1210	if (expect_false (prev->flags & CF_NEW))
		1211	{
		1212	/* create a new empty context */
		1213	Newz (0, prev->cctx, 1, coro_cctx);
		1214	prev->flags &= ~CF_NEW;
		1215	prev->flags \|= CF_RUNNING;
		1216	}
		1217
		1218	prev->flags &= ~CF_RUNNING;
		1219	next->flags \|= CF_RUNNING;
		1220
671	LOCK;	1221	LOCK;
672		1222
673	if (next->mainstack)	1223	/* first get rid of the old state */
		1224	save_perl (aTHX_ prev);
		1225
		1226	if (expect_false (next->flags & CF_NEW))
674	{	1227	{
675	/* coroutine already started */	1228	/* need to start coroutine */
676	SAVE (prev, flags);	1229	next->flags &= ~CF_NEW;
677	LOAD (next);	1230	/* setup coroutine call */
		1231	coro_setup (aTHX_ next);
678	}	1232	}
679	else	1233	else
		1234	load_perl (aTHX_ next);
		1235
		1236	prev__cctx = prev->cctx;
		1237
		1238	/* possibly "free" the cctx */
		1239	if (expect_true (
		1240	prev__cctx->idle_sp == STACKLEVEL
		1241	&& !(prev__cctx->flags & CC_TRACE)
		1242	&& !force_cctx
		1243	))
680	{	1244	{
681	/* need to start coroutine */	1245	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
682	/* first get rid of the old state */	1246	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
683	SAVE (prev, -1);	1247
684	/* setup coroutine call */
685	setup_coro (next);
686	/* need a stack */
687	next->cctx = 0;	1248	prev->cctx = 0;
		1249
		1250	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1251	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1252	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1253	if (!next->cctx)
		1254	next->cctx = cctx_get (aTHX);
		1255
		1256	cctx_put (prev__cctx);
688	}	1257	}
689		1258
690	if (!prev->cctx)	1259	++next->usecount;
691	/* create a new empty context */
692	Newz (0, prev->cctx, 1, coro_cctx);
693		1260
694	prev__cctx = prev->cctx;
695
696	/* possibly "free" the cctx */
697	if (prev__cctx->idle_sp == STACKLEVEL)
698	{
699	assert (PL_top_env == prev__cctx->top_env);//D
700	cctx_put (prev__cctx);
701	prev->cctx = 0;
702	}
703
704	if (!next->cctx)	1261	if (expect_true (!next->cctx))
705	next->cctx = cctx_get ();	1262	next->cctx = cctx_get (aTHX);
706		1263
		1264	has_throw = !!next->throw;
		1265
707	if (prev__cctx != next->cctx)	1266	if (expect_false (prev__cctx != next->cctx))
708	{	1267	{
709	prev__cctx->top_env = PL_top_env;	1268	prev__cctx->top_env = PL_top_env;
710	PL_top_env = next->cctx->top_env;	1269	PL_top_env = next->cctx->top_env;
711	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1270	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
712	}	1271	}
713		1272
714	free_coro_mortal ();	1273	free_coro_mortal (aTHX);
715
716	UNLOCK;	1274	UNLOCK;
		1275
		1276	if (expect_false (has_throw))
		1277	{
		1278	struct coro *coro = SvSTATE (coro_current);
		1279
		1280	if (coro->throw)
		1281	{
		1282	SV *exception = coro->throw;
		1283	coro->throw = 0;
		1284	sv_setsv (ERRSV, exception);
		1285	croak (0);
		1286	}
		1287	}
717	}	1288	}
718	}	1289	}
719		1290
720	struct transfer_args	1291	struct transfer_args
721	{	1292	{
722	struct coro prev, next;	1293	struct coro prev, next;
723	int flags;
724	};	1294	};
725		1295
		1296	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
726	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1297	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
727		1298
		1299	/ high level stuff ******************************************************/
		1300
728	static void	1301	static int
729	coro_state_destroy (struct coro *coro)	1302	coro_state_destroy (pTHX_ struct coro *coro)
730	{	1303	{
731	if (coro->refcnt--)	1304	if (coro->flags & CF_DESTROYED)
732	return;	1305	return 0;
		1306
		1307	coro->flags \|= CF_DESTROYED;
		1308
		1309	if (coro->flags & CF_READY)
		1310	{
		1311	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1312	/* alternative: look through all ready queues and remove the coro */
		1313	LOCK;
		1314	--coro_nready;
		1315	UNLOCK;
		1316	}
		1317	else
		1318	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
733		1319
734	if (coro->mainstack && coro->mainstack != main_mainstack)	1320	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	1321	{
736	struct coro temp;	1322	struct coro temp;
737		1323
738	SAVE ((&temp), TRANSFER_SAVE_ALL);	1324	if (coro->flags & CF_RUNNING)
739	LOAD (coro);	1325	croak ("FATAL: tried to destroy currently running coroutine");
740		1326
741	coro_destroy_stacks ();	1327	save_perl (aTHX_ &temp);
		1328	load_perl (aTHX_ coro);
742		1329
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1330	coro_destroy (aTHX_ coro);
744		1331
		1332	load_perl (aTHX_ &temp);
		1333
745	coro->mainstack = 0;	1334	coro->slot = 0;
746	}	1335	}
747		1336
748	cctx_free (coro->cctx);	1337	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	1338	SvREFCNT_dec (coro->args);
750	Safefree (coro);	1339
		1340	if (coro->next) coro->next->prev = coro->prev;
		1341	if (coro->prev) coro->prev->next = coro->next;
		1342	if (coro == coro_first) coro_first = coro->next;
		1343
		1344	return 1;
751	}	1345	}
752		1346
753	static int	1347	static int
754	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1348	coro_state_free (pTHX_ SV sv, MAGIC mg)
755	{	1349	{
756	struct coro coro = (struct coro )mg->mg_ptr;	1350	struct coro coro = (struct coro )mg->mg_ptr;
757	mg->mg_ptr = 0;	1351	mg->mg_ptr = 0;
758		1352
		1353	coro->hv = 0;
		1354
		1355	if (--coro->refcnt < 0)
		1356	{
759	coro_state_destroy (coro);	1357	coro_state_destroy (aTHX_ coro);
		1358	Safefree (coro);
		1359	}
760		1360
761	return 0;	1361	return 0;
762	}	1362	}
763		1363
764	static int	1364	static int
…		…
771	return 0;	1371	return 0;
772	}	1372	}
773		1373
774	static MGVTBL coro_state_vtbl = {	1374	static MGVTBL coro_state_vtbl = {
775	0, 0, 0, 0,	1375	0, 0, 0, 0,
776	coro_state_clear,	1376	coro_state_free,
777	0,	1377	0,
778	#ifdef MGf_DUP	1378	#ifdef MGf_DUP
779	coro_state_dup,	1379	coro_state_dup,
780	#else	1380	#else
781	# define MGf_DUP 0	1381	# define MGf_DUP 0
782	#endif	1382	#endif
783	};	1383	};
784		1384
785	static struct coro *
786	SvSTATE (SV *coro)
787	{
788	HV *stash;
789	MAGIC *mg;
790
791	if (SvROK (coro))
792	coro = SvRV (coro);
793
794	stash = SvSTASH (coro);
795	if (stash != coro_stash && stash != coro_state_stash)
796	{
797	/* very slow, but rare, check */
798	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
799	croak ("Coro::State object required");
800	}
801
802	mg = SvMAGIC (coro);
803	assert (mg->mg_type == PERL_MAGIC_ext);
804	return (struct coro *)mg->mg_ptr;
805	}
806
807	static void	1385	static void
808	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1386	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
809	{	1387	{
810	ta->prev = SvSTATE (prev);	1388	ta->prev = SvSTATE (prev_sv);
811	ta->next = SvSTATE (next);	1389	ta->next = SvSTATE (next_sv);
812	ta->flags = flags;	1390	TRANSFER_CHECK (*ta);
813	}	1391	}
814		1392
815	static void	1393	static void
816	api_transfer (SV prev, SV next, int flags)	1394	api_transfer (SV prev_sv, SV next_sv)
817	{	1395	{
818	dTHX;	1396	dTHX;
819	struct transfer_args ta;	1397	struct transfer_args ta;
820		1398
821	prepare_transfer (&ta, prev, next, flags);	1399	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
822	TRANSFER (ta);	1400	TRANSFER (ta, 1);
823	}	1401	}
824		1402
825	/ Coro ******************************************************************/	1403	/ Coro ******************************************************************/
826		1404
827	#define PRIO_MAX 3
828	#define PRIO_HIGH 1
829	#define PRIO_NORMAL 0
830	#define PRIO_LOW -1
831	#define PRIO_IDLE -3
832	#define PRIO_MIN -4
833
834	/* for Coro.pm */
835	static GV coro_current, coro_idle;
836	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
837	static int coro_nready;
838
839	static void	1405	static void
840	coro_enq (SV *sv)	1406	coro_enq (pTHX_ SV *coro_sv)
		1407	{
		1408	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1409	}
		1410
		1411	static SV *
		1412	coro_deq (pTHX)
841	{	1413	{
842	int prio;	1414	int prio;
843		1415
844	if (SvTYPE (sv) != SVt_PVHV)
845	croak ("Coro::ready tried to enqueue something that is not a coroutine");
846
847	prio = SvSTATE (sv)->prio;
848
849	av_push (coro_ready [prio - PRIO_MIN], sv);
850	coro_nready++;
851	}
852
853	static SV *
854	coro_deq (int min_prio)
855	{
856	int prio = PRIO_MAX - PRIO_MIN;
857
858	min_prio -= PRIO_MIN;
859	if (min_prio < 0)
860	min_prio = 0;
861
862	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1416	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
863	if (AvFILLp (coro_ready [prio]) >= 0)	1417	if (AvFILLp (coro_ready [prio]) >= 0)
864	{
865	coro_nready--;
866	return av_shift (coro_ready [prio]);	1418	return av_shift (coro_ready [prio]);
867	}
868		1419
869	return 0;	1420	return 0;
870	}	1421	}
871		1422
		1423	static int
		1424	api_ready (SV *coro_sv)
		1425	{
		1426	dTHX;
		1427	struct coro *coro;
		1428	SV *sv_hook;
		1429	void (*xs_hook)(void);
		1430
		1431	if (SvROK (coro_sv))
		1432	coro_sv = SvRV (coro_sv);
		1433
		1434	coro = SvSTATE (coro_sv);
		1435
		1436	if (coro->flags & CF_READY)
		1437	return 0;
		1438
		1439	coro->flags \|= CF_READY;
		1440
		1441	LOCK;
		1442
		1443	sv_hook = coro_nready ? 0 : coro_readyhook;
		1444	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1445
		1446	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1447	++coro_nready;
		1448
		1449	UNLOCK;
		1450
		1451	if (sv_hook)
		1452	{
		1453	dSP;
		1454
		1455	ENTER;
		1456	SAVETMPS;
		1457
		1458	PUSHMARK (SP);
		1459	PUTBACK;
		1460	call_sv (sv_hook, G_DISCARD);
		1461	SPAGAIN;
		1462
		1463	FREETMPS;
		1464	LEAVE;
		1465	}
		1466
		1467	if (xs_hook)
		1468	xs_hook ();
		1469
		1470	return 1;
		1471	}
		1472
		1473	static int
		1474	api_is_ready (SV *coro_sv)
		1475	{
		1476	dTHX;
		1477	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1478	}
		1479
872	static void	1480	static void
873	api_ready (SV *coro)	1481	prepare_schedule (pTHX_ struct transfer_args *ta)
874	{	1482	{
875	dTHX;	1483	SV prev_sv, next_sv;
876		1484
877	if (SvROK (coro))	1485	for (;;)
878	coro = SvRV (coro);	1486	{
		1487	LOCK;
		1488	next_sv = coro_deq (aTHX);
		1489
		1490	/* nothing to schedule: call the idle handler */
		1491	if (expect_false (!next_sv))
		1492	{
		1493	dSP;
		1494	UNLOCK;
		1495
		1496	ENTER;
		1497	SAVETMPS;
		1498
		1499	PUSHMARK (SP);
		1500	PUTBACK;
		1501	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1502	SPAGAIN;
		1503
		1504	FREETMPS;
		1505	LEAVE;
		1506	continue;
		1507	}
		1508
		1509	ta->next = SvSTATE (next_sv);
		1510
		1511	/* cannot transfer to destroyed coros, skip and look for next */
		1512	if (expect_false (ta->next->flags & CF_DESTROYED))
		1513	{
		1514	UNLOCK;
		1515	SvREFCNT_dec (next_sv);
		1516	/* coro_nready is already taken care of by destroy */
		1517	continue;
		1518	}
		1519
		1520	--coro_nready;
		1521	UNLOCK;
		1522	break;
		1523	}
		1524
		1525	/* free this only after the transfer */
		1526	prev_sv = SvRV (coro_current);
		1527	ta->prev = SvSTATE (prev_sv);
		1528	TRANSFER_CHECK (*ta);
		1529	assert (ta->next->flags & CF_READY);
		1530	ta->next->flags &= ~CF_READY;
		1531	SvRV_set (coro_current, next_sv);
879		1532
880	LOCK;	1533	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	1534	free_coro_mortal (aTHX);
		1535	coro_mortal = prev_sv;
882	UNLOCK;	1536	UNLOCK;
883	}	1537	}
884		1538
885	static void	1539	static void
886	prepare_schedule (struct transfer_args *ta)
887	{
888	SV current, prev, *next;
889
890	current = GvSV (coro_current);
891
892	for (;;)
893	{
894	LOCK;
895	next = coro_deq (PRIO_MIN);
896	UNLOCK;
897
898	if (next)
899	break;
900
901	{
902	dSP;
903
904	ENTER;
905	SAVETMPS;
906
907	PUSHMARK (SP);
908	PUTBACK;
909	call_sv (GvSV (coro_idle), G_DISCARD);
910
911	FREETMPS;
912	LEAVE;
913	}
914	}
915
916	prev = SvRV (current);
917	SvRV (current) = next;
918
919	/* free this only after the transfer */
920	LOCK;
921	free_coro_mortal ();
922	UNLOCK;
923	coro_mortal = prev;
924
925	ta->prev = SvSTATE (prev);
926	ta->next = SvSTATE (next);
927	ta->flags = TRANSFER_SAVE_ALL;
928	}
929
930	static void
931	prepare_cede (struct transfer_args *ta)	1540	prepare_cede (pTHX_ struct transfer_args *ta)
932	{	1541	{
933	LOCK;	1542	api_ready (coro_current);
934	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
935	UNLOCK;
936
937	prepare_schedule (ta);	1543	prepare_schedule (aTHX_ ta);
		1544	}
		1545
		1546	static int
		1547	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1548	{
		1549	if (coro_nready)
		1550	{
		1551	SV *prev = SvRV (coro_current);
		1552	prepare_schedule (aTHX_ ta);
		1553	api_ready (prev);
		1554	return 1;
		1555	}
		1556	else
		1557	return 0;
938	}	1558	}
939		1559
940	static void	1560	static void
941	api_schedule (void)	1561	api_schedule (void)
942	{	1562	{
943	dTHX;	1563	dTHX;
944	struct transfer_args ta;	1564	struct transfer_args ta;
945		1565
946	prepare_schedule (&ta);	1566	prepare_schedule (aTHX_ &ta);
947	TRANSFER (ta);	1567	TRANSFER (ta, 1);
948	}	1568	}
949		1569
950	static void	1570	static int
951	api_cede (void)	1571	api_cede (void)
952	{	1572	{
953	dTHX;	1573	dTHX;
954	struct transfer_args ta;	1574	struct transfer_args ta;
955		1575
956	prepare_cede (&ta);	1576	prepare_cede (aTHX_ &ta);
		1577
		1578	if (expect_true (ta.prev != ta.next))
		1579	{
957	TRANSFER (ta);	1580	TRANSFER (ta, 1);
		1581	return 1;
		1582	}
		1583	else
		1584	return 0;
958	}	1585	}
959		1586
		1587	static int
		1588	api_cede_notself (void)
		1589	{
		1590	dTHX;
		1591	struct transfer_args ta;
		1592
		1593	if (prepare_cede_notself (aTHX_ &ta))
		1594	{
		1595	TRANSFER (ta, 1);
		1596	return 1;
		1597	}
		1598	else
		1599	return 0;
		1600	}
		1601
		1602	static void
		1603	api_trace (SV *coro_sv, int flags)
		1604	{
		1605	dTHX;
		1606	struct coro *coro = SvSTATE (coro_sv);
		1607
		1608	if (flags & CC_TRACE)
		1609	{
		1610	if (!coro->cctx)
		1611	coro->cctx = cctx_new ();
		1612	else if (!(coro->cctx->flags & CC_TRACE))
		1613	croak ("cannot enable tracing on coroutine with custom stack");
		1614
		1615	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1616	}
		1617	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1618	{
		1619	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1620
		1621	if (coro->flags & CF_RUNNING)
		1622	PL_runops = RUNOPS_DEFAULT;
		1623	else
		1624	coro->slot->runops = RUNOPS_DEFAULT;
		1625	}
		1626	}
		1627
		1628	static int
		1629	coro_gensub_free (pTHX_ SV sv, MAGIC mg)
		1630	{
		1631	AV *padlist;
		1632	AV av = (AV )mg->mg_obj;
		1633
		1634	abort ();
		1635
		1636	return 0;
		1637	}
		1638
		1639	static MGVTBL coro_gensub_vtbl = {
		1640	0, 0, 0, 0,
		1641	coro_gensub_free
		1642	};
		1643
960	MODULE = Coro::State PACKAGE = Coro::State	1644	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
961		1645
962	PROTOTYPES: DISABLE	1646	PROTOTYPES: DISABLE
963		1647
964	BOOT:	1648	BOOT:
965	{	1649	{
966	#ifdef USE_ITHREADS	1650	#ifdef USE_ITHREADS
967	MUTEX_INIT (&coro_mutex);	1651	MUTEX_INIT (&coro_mutex);
968	#endif	1652	#endif
969	BOOT_PAGESIZE;	1653	BOOT_PAGESIZE;
970		1654
		1655	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1656	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1657
		1658	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1659	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1660	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1661
		1662	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1663	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1664	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1665
971	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1666	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
972		1667
973	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1668	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
974	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1669	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
975	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1670	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1671	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
976		1672
977	main_mainstack = PL_mainstack;	1673	main_mainstack = PL_mainstack;
		1674	main_top_env = PL_top_env;
978		1675
		1676	while (main_top_env->je_prev)
		1677	main_top_env = main_top_env->je_prev;
		1678
979	coroapi.ver = CORO_API_VERSION;	1679	coroapi.ver = CORO_API_VERSION;
		1680	coroapi.rev = CORO_API_REVISION;
980	coroapi.transfer = api_transfer;	1681	coroapi.transfer = api_transfer;
981		1682
982	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1683	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
983	}	1684	}
984		1685
985	SV *	1686	SV *
986	new (char *klass, ...)	1687	new (char *klass, ...)
987	CODE:	1688	CODE:
988	{	1689	{
989	struct coro *coro;	1690	struct coro *coro;
		1691	MAGIC *mg;
990	HV *hv;	1692	HV *hv;
991	int i;	1693	int i;
992		1694
993	Newz (0, coro, 1, struct coro);	1695	Newz (0, coro, 1, struct coro);
994	coro->args = newAV ();	1696	coro->args = newAV ();
		1697	coro->flags = CF_NEW;
995		1698
		1699	if (coro_first) coro_first->prev = coro;
		1700	coro->next = coro_first;
		1701	coro_first = coro;
		1702
996	hv = newHV ();	1703	coro->hv = hv = newHV ();
997	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1704	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1705	mg->mg_flags \|= MGf_DUP;
998	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1706	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
999		1707
		1708	av_extend (coro->args, items - 1);
1000	for (i = 1; i < items; i++)	1709	for (i = 1; i < items; i++)
1001	av_push (coro->args, newSVsv (ST (i)));	1710	av_push (coro->args, newSVsv (ST (i)));
1002	}	1711	}
1003	OUTPUT:	1712	OUTPUT:
1004	RETVAL	1713	RETVAL
1005		1714
		1715	# these not obviously related functions are all rolled into the same xs
		1716	# function to increase chances that they all will call transfer with the same
		1717	# stack offset
1006	void	1718	void
1007	_set_stacklevel (...)	1719	_set_stacklevel (...)
1008	ALIAS:	1720	ALIAS:
1009	Coro::State::transfer = 1	1721	Coro::State::transfer = 1
1010	Coro::schedule = 2	1722	Coro::schedule = 2
1011	Coro::cede = 3	1723	Coro::cede = 3
1012	Coro::Cont::yield = 4	1724	Coro::cede_notself = 4
1013	CODE:	1725	CODE:
1014	{	1726	{
1015	struct transfer_args ta;	1727	struct transfer_args ta;
1016		1728
		1729	PUTBACK;
1017	switch (ix)	1730	switch (ix)
1018	{	1731	{
1019	case 0:	1732	case 0:
1020	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1733	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1021	ta.next = 0;	1734	ta.next = 0;
1022	ta.flags = TRANSFER_SET_STACKLEVEL;
1023	break;	1735	break;
1024		1736
1025	case 1:	1737	case 1:
1026	if (items != 3)	1738	if (items != 2)
1027	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1739	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1028		1740
1029	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1741	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1030	break;	1742	break;
1031		1743
1032	case 2:	1744	case 2:
1033	prepare_schedule (&ta);	1745	prepare_schedule (aTHX_ &ta);
1034	break;	1746	break;
1035		1747
1036	case 3:	1748	case 3:
1037	prepare_cede (&ta);	1749	prepare_cede (aTHX_ &ta);
1038	break;	1750	break;
1039		1751
1040	case 4:	1752	case 4:
1041	{	1753	if (!prepare_cede_notself (aTHX_ &ta))
1042	SV *yieldstack;	1754	XSRETURN_EMPTY;
1043	SV *sv;
1044	AV *defav = GvAV (PL_defgv);
1045		1755
1046	yieldstack = *hv_fetch (
1047	(HV *)SvRV (GvSV (coro_current)),
1048	"yieldstack", sizeof ("yieldstack") - 1,
1049	0
1050	);
1051
1052	/* set up @_ -- ugly */
1053	av_clear (defav);
1054	av_fill (defav, items - 1);
1055	while (items--)
1056	av_store (defav, items, SvREFCNT_inc (ST(items)));
1057
1058	sv = av_pop ((AV *)SvRV (yieldstack));
1059	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1060	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1061	ta.flags = 0;
1062	SvREFCNT_dec (sv);
1063	}
1064	break;	1756	break;
1065
1066	}	1757	}
		1758	SPAGAIN;
1067		1759
		1760	BARRIER;
		1761	PUTBACK;
1068	TRANSFER (ta);	1762	TRANSFER (ta, 0);
		1763	SPAGAIN; /* might be the sp of a different coroutine now */
		1764	/* be extra careful not to ever do anything after TRANSFER */
1069	}	1765	}
		1766
		1767	bool
		1768	_destroy (SV *coro_sv)
		1769	CODE:
		1770	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1771	OUTPUT:
		1772	RETVAL
1070		1773
1071	void	1774	void
1072	_clone_state_from (SV dst, SV src)
1073	CODE:
1074	{
1075	struct coro *coro_src = SvSTATE (src);
1076
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1081	}
1082
1083	void
1084	_exit (code)	1775	_exit (int code)
1085	int code
1086	PROTOTYPE: $	1776	PROTOTYPE: $
1087	CODE:	1777	CODE:
1088	_exit (code);	1778	_exit (code);
		1779
		1780	int
		1781	cctx_stacksize (int new_stacksize = 0)
		1782	CODE:
		1783	RETVAL = coro_stacksize;
		1784	if (new_stacksize)
		1785	coro_stacksize = new_stacksize;
		1786	OUTPUT:
		1787	RETVAL
1089		1788
1090	int	1789	int
1091	cctx_count ()	1790	cctx_count ()
1092	CODE:	1791	CODE:
1093	RETVAL = cctx_count;	1792	RETVAL = cctx_count;
…		…
1099	CODE:	1798	CODE:
1100	RETVAL = cctx_idle;	1799	RETVAL = cctx_idle;
1101	OUTPUT:	1800	OUTPUT:
1102	RETVAL	1801	RETVAL
1103		1802
		1803	void
		1804	list ()
		1805	PPCODE:
		1806	{
		1807	struct coro *coro;
		1808	for (coro = coro_first; coro; coro = coro->next)
		1809	if (coro->hv)
		1810	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1811	}
		1812
		1813	void
		1814	call (Coro::State coro, SV *coderef)
		1815	ALIAS:
		1816	eval = 1
		1817	CODE:
		1818	{
		1819	if (coro->mainstack)
		1820	{
		1821	struct coro temp;
		1822
		1823	if (!(coro->flags & CF_RUNNING))
		1824	{
		1825	PUTBACK;
		1826	save_perl (aTHX_ &temp);
		1827	load_perl (aTHX_ coro);
		1828	}
		1829
		1830	{
		1831	dSP;
		1832	ENTER;
		1833	SAVETMPS;
		1834	PUTBACK;
		1835	PUSHSTACK;
		1836	PUSHMARK (SP);
		1837
		1838	if (ix)
		1839	eval_sv (coderef, 0);
		1840	else
		1841	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1842
		1843	POPSTACK;
		1844	SPAGAIN;
		1845	FREETMPS;
		1846	LEAVE;
		1847	PUTBACK;
		1848	}
		1849
		1850	if (!(coro->flags & CF_RUNNING))
		1851	{
		1852	save_perl (aTHX_ coro);
		1853	load_perl (aTHX_ &temp);
		1854	SPAGAIN;
		1855	}
		1856	}
		1857	}
		1858
		1859	SV *
		1860	is_ready (Coro::State coro)
		1861	PROTOTYPE: $
		1862	ALIAS:
		1863	is_ready = CF_READY
		1864	is_running = CF_RUNNING
		1865	is_new = CF_NEW
		1866	is_destroyed = CF_DESTROYED
		1867	CODE:
		1868	RETVAL = boolSV (coro->flags & ix);
		1869	OUTPUT:
		1870	RETVAL
		1871
		1872	void
		1873	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1874
		1875	SV *
		1876	has_cctx (Coro::State coro)
		1877	PROTOTYPE: $
		1878	CODE:
		1879	RETVAL = boolSV (!!coro->cctx);
		1880	OUTPUT:
		1881	RETVAL
		1882
		1883	int
		1884	is_traced (Coro::State coro)
		1885	PROTOTYPE: $
		1886	CODE:
		1887	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1888	OUTPUT:
		1889	RETVAL
		1890
		1891	IV
		1892	rss (Coro::State coro)
		1893	PROTOTYPE: $
		1894	ALIAS:
		1895	usecount = 1
		1896	CODE:
		1897	switch (ix)
		1898	{
		1899	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1900	case 1: RETVAL = coro->usecount; break;
		1901	}
		1902	OUTPUT:
		1903	RETVAL
		1904
		1905	void
		1906	force_cctx ()
		1907	CODE:
		1908	struct coro *coro = SvSTATE (coro_current);
		1909	coro->cctx->idle_sp = 0;
		1910
		1911	void
		1912	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1913	PROTOTYPE: $;$
		1914	CODE:
		1915	SvREFCNT_dec (self->throw);
		1916	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1917
		1918	void
		1919	swap_defsv (Coro::State self)
		1920	PROTOTYPE: $
		1921	ALIAS:
		1922	swap_defav = 1
		1923	CODE:
		1924	if (!self->slot)
		1925	croak ("cannot swap state with coroutine that has no saved state");
		1926	else
		1927	{
		1928	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1929	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
		1930
		1931	SV tmp = src; src = dst; *dst = tmp;
		1932	}
		1933
1104	MODULE = Coro::State PACKAGE = Coro	1934	MODULE = Coro::State PACKAGE = Coro
1105		1935
1106	BOOT:	1936	BOOT:
1107	{	1937	{
1108	int i;	1938	int i;
1109		1939
		1940	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1941	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1942	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1943
		1944	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1945	SvREADONLY_on (coro_current);
		1946
1110	coro_stash = gv_stashpv ("Coro", TRUE);	1947	coro_stash = gv_stashpv ("Coro", TRUE);
1111		1948
1112	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1949	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1113	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1950	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1114	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1951	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1115	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1952	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1116	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1953	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1117	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1954	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1118		1955
1119	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1120	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1121
1122	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1956	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1123	coro_ready[i] = newAV ();	1957	coro_ready[i] = newAV ();
1124		1958
1125	{	1959	{
1126	SV *sv = perl_get_sv("Coro::API", 1);	1960	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1961	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1127		1962
1128	coroapi.schedule = api_schedule;	1963	coroapi.schedule = api_schedule;
1129	coroapi.cede = api_cede;	1964	coroapi.cede = api_cede;
		1965	coroapi.cede_notself = api_cede_notself;
1130	coroapi.ready = api_ready;	1966	coroapi.ready = api_ready;
		1967	coroapi.is_ready = api_is_ready;
1131	coroapi.nready = &coro_nready;	1968	coroapi.nready = &coro_nready;
1132	coroapi.current = coro_current;	1969	coroapi.current = coro_current;
1133		1970
1134	GCoroAPI = &coroapi;	1971	GCoroAPI = &coroapi;
1135	sv_setiv (sv, (IV)&coroapi);	1972	sv_setiv (sv, (IV)&coroapi);
1136	SvREADONLY_on (sv);	1973	SvREADONLY_on (sv);
1137	}	1974	}
1138	}	1975	}
		1976
		1977	void
		1978	_set_current (SV *current)
		1979	PROTOTYPE: $
		1980	CODE:
		1981	SvREFCNT_dec (SvRV (coro_current));
		1982	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1983
		1984	void
		1985	_set_readyhook (SV *hook)
		1986	PROTOTYPE: $
		1987	CODE:
		1988	LOCK;
		1989	SvREFCNT_dec (coro_readyhook);
		1990	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1991	UNLOCK;
1139		1992
1140	int	1993	int
1141	prio (Coro::State coro, int newprio = 0)	1994	prio (Coro::State coro, int newprio = 0)
1142	ALIAS:	1995	ALIAS:
1143	nice = 1	1996	nice = 1
…		…
1146	RETVAL = coro->prio;	1999	RETVAL = coro->prio;
1147		2000
1148	if (items > 1)	2001	if (items > 1)
1149	{	2002	{
1150	if (ix)	2003	if (ix)
1151	newprio += coro->prio;	2004	newprio = coro->prio - newprio;
1152		2005
1153	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	2006	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1154	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	2007	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1155		2008
1156	coro->prio = newprio;	2009	coro->prio = newprio;
1157	}	2010	}
1158	}	2011	}
		2012	OUTPUT:
		2013	RETVAL
1159		2014
1160	void	2015	SV *
1161	ready (SV *self)	2016	ready (SV *self)
1162	PROTOTYPE: $	2017	PROTOTYPE: $
1163	CODE:	2018	CODE:
1164	api_ready (self);	2019	RETVAL = boolSV (api_ready (self));
		2020	OUTPUT:
		2021	RETVAL
1165		2022
1166	int	2023	int
1167	nready (...)	2024	nready (...)
1168	PROTOTYPE:	2025	PROTOTYPE:
1169	CODE:	2026	CODE:
1170	RETVAL = coro_nready;	2027	RETVAL = coro_nready;
1171	OUTPUT:	2028	OUTPUT:
1172	RETVAL	2029	RETVAL
1173		2030
		2031	# for async_pool speedup
		2032	void
		2033	_pool_1 (SV *cb)
		2034	CODE:
		2035	{
		2036	struct coro *coro = SvSTATE (coro_current);
		2037	HV hv = (HV )SvRV (coro_current);
		2038	AV *defav = GvAV (PL_defgv);
		2039	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2040	AV *invoke_av;
		2041	int i, len;
		2042
		2043	if (!invoke)
		2044	{
		2045	SV *old = PL_diehook;
		2046	PL_diehook = 0;
		2047	SvREFCNT_dec (old);
		2048	croak ("\3async_pool terminate\2\n");
		2049	}
		2050
		2051	SvREFCNT_dec (coro->saved_deffh);
		2052	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2053
		2054	hv_store (hv, "desc", sizeof ("desc") - 1,
		2055	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2056
		2057	invoke_av = (AV *)SvRV (invoke);
		2058	len = av_len (invoke_av);
		2059
		2060	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2061
		2062	if (len > 0)
		2063	{
		2064	av_fill (defav, len - 1);
		2065	for (i = 0; i < len; ++i)
		2066	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2067	}
		2068
		2069	SvREFCNT_dec (invoke);
		2070	}
		2071
		2072	void
		2073	_pool_2 (SV *cb)
		2074	CODE:
		2075	{
		2076	struct coro *coro = SvSTATE (coro_current);
		2077
		2078	sv_setsv (cb, &PL_sv_undef);
		2079
		2080	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		2081	coro->saved_deffh = 0;
		2082
		2083	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2084	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2085	{
		2086	SV *old = PL_diehook;
		2087	PL_diehook = 0;
		2088	SvREFCNT_dec (old);
		2089	croak ("\3async_pool terminate\2\n");
		2090	}
		2091
		2092	av_clear (GvAV (PL_defgv));
		2093	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2094	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2095
		2096	coro->prio = 0;
		2097
		2098	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2099	api_trace (coro_current, 0);
		2100
		2101	av_push (av_async_pool, newSVsv (coro_current));
		2102	}
		2103
		2104	#if 0
		2105
		2106	void
		2107	_generator_call (...)
		2108	PROTOTYPE: @
		2109	PPCODE:
		2110	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
		2111	xxxx
		2112	abort ();
		2113
		2114	SV *
		2115	gensub (SV *sub, ...)
		2116	PROTOTYPE: &;@
		2117	CODE:
		2118	{
		2119	struct coro *coro;
		2120	MAGIC *mg;
		2121	CV *xcv;
		2122	CV ncv = (CV )newSV_type (SVt_PVCV);
		2123	int i;
		2124
		2125	CvGV (ncv) = CvGV (cv);
		2126	CvFILE (ncv) = CvFILE (cv);
		2127
		2128	Newz (0, coro, 1, struct coro);
		2129	coro->args = newAV ();
		2130	coro->flags = CF_NEW;
		2131
		2132	av_extend (coro->args, items - 1);
		2133	for (i = 1; i < items; i++)
		2134	av_push (coro->args, newSVsv (ST (i)));
		2135
		2136	CvISXSUB_on (ncv);
		2137	CvXSUBANY (ncv).any_ptr = (void *)coro;
		2138
		2139	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
		2140
		2141	CvXSUB (ncv) = CvXSUB (xcv);
		2142	CvANON_on (ncv);
		2143
		2144	mg = sv_magicext ((SV )ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char )coro, 0);
		2145	RETVAL = newRV_noinc ((SV *)ncv);
		2146	}
		2147	OUTPUT:
		2148	RETVAL
		2149
		2150	#endif
		2151
		2152
1174	MODULE = Coro::State PACKAGE = Coro::AIO	2153	MODULE = Coro::State PACKAGE = Coro::AIO
1175		2154
1176	SV *	2155	SV *
1177	_get_state ()	2156	_get_state ()
1178	CODE:	2157	CODE:
1179	{	2158	{
1180	struct {	2159	struct io_state *data;
1181	int errorno;
1182	int laststype;
1183	int laststatval;
1184	Stat_t statcache;
1185	} data;
1186		2160
		2161	RETVAL = newSV (sizeof (struct io_state));
		2162	data = (struct io_state *)SvPVX (RETVAL);
		2163	SvCUR_set (RETVAL, sizeof (struct io_state));
		2164	SvPOK_only (RETVAL);
		2165
1187	data.errorno = errno;	2166	data->errorno = errno;
1188	data.laststype = PL_laststype;	2167	data->laststype = PL_laststype;
1189	data.laststatval = PL_laststatval;	2168	data->laststatval = PL_laststatval;
1190	data.statcache = PL_statcache;	2169	data->statcache = PL_statcache;
1191
1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
1193	}	2170	}
1194	OUTPUT:	2171	OUTPUT:
1195	RETVAL	2172	RETVAL
1196		2173
1197	void	2174	void
1198	_set_state (char *data_)	2175	_set_state (char *data_)
1199	PROTOTYPE: $	2176	PROTOTYPE: $
1200	CODE:	2177	CODE:
1201	{	2178	{
1202	struct {	2179	struct io_state data = (void )data_;
1203	int errorno;
1204	int laststype;
1205	int laststatval;
1206	Stat_t statcache;
1207	} data = (void )data_;
1208		2180
1209	errno = data->errorno;	2181	errno = data->errorno;
1210	PL_laststype = data->laststype;	2182	PL_laststype = data->laststype;
1211	PL_laststatval = data->laststatval;	2183	PL_laststatval = data->laststatval;
1212	PL_statcache = data->statcache;	2184	PL_statcache = data->statcache;
1213	}	2185	}
		2186
		2187
		2188	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2189
		2190	BOOT:
		2191	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2192
		2193	SV *
		2194	_schedule (...)
		2195	PROTOTYPE: @
		2196	CODE:
		2197	{
		2198	static int incede;
		2199
		2200	api_cede_notself ();
		2201
		2202	++incede;
		2203	while (coro_nready >= incede && api_cede ())
		2204	;
		2205
		2206	sv_setsv (sv_activity, &PL_sv_undef);
		2207	if (coro_nready >= incede)
		2208	{
		2209	PUSHMARK (SP);
		2210	PUTBACK;
		2211	call_pv ("Coro::AnyEvent::_activity", G_DISCARD \| G_EVAL);
		2212	SPAGAIN;
		2213	}
		2214
		2215	--incede;
		2216	}
		2217

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Comparing Coro/Coro/State.xs (file contents): Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC vs. Revision 1.243 by root, Sat Aug 30 03:07:46 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC vs.
Revision 1.243 by root, Sat Aug 30 03:07:46 2008 UTC