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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.116 by root, Fri Dec 1 14:01:43 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	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	\|\| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	12	#include <stdio.h>
44	#include <errno.h>	13	#include <errno.h>
		14	#include <assert.h>
45		15
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	16	#ifdef WIN32
47	# undef STACKGUARD	17	# undef setjmp
48	#endif	18	# undef longjmp
49		19	# undef _exit
50	#ifndef STACKGUARD	20	# define setjmp _setjmp // deep magic, don't ask
51	# define STACKGUARD 0	21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
52	#endif	23	#endif
53		24
54	#ifdef HAVE_MMAP	25	#ifdef HAVE_MMAP
55	# include <unistd.h>	26	# include <unistd.h>
56	# include <sys/mman.h>	27	# include <sys/mman.h>
72	#else	43	#else
73	# define PAGESIZE 0	44	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	45	# define BOOT_PAGESIZE (void)0
75	#endif	46	#endif
76		47
77	/* The next macro should declare a variable stacklevel that contains and approximation	48	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	49	# include <valgrind/valgrind.h>
79	* 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. */
80	#define dSTACKLEVEL int stacklevel	118	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	119	#define STACKLEVEL ((void *)&stacklevel)
82		120
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		122
85	#if __GNUC__ >= 3	123	#if __GNUC__ >= 3
86	# 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))
87	#else	127	#else
88	# define attribute(x)	128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
89	#endif	131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
90		135
91	#define NOINLINE attribute ((noinline))	136	#define NOINLINE attribute ((noinline))
92		137
93	#include "CoroAPI.h"	138	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		139
97	#ifdef USE_ITHREADS	140	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	141	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	144	#else
102	# define LOCK (void)0	145	# define LOCK (void)0
103	# define UNLOCK (void)0	146	# define UNLOCK (void)0
104	#endif	147	#endif
105		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;
106	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
107	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;
108	static HV coro_state_stash, coro_stash;	162	static HV coro_state_stash, coro_stash;
109	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;
110		178
111	static struct coro_cctx *cctx_first;	179	static struct coro_cctx *cctx_first;
112	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	};
113		190
114	/* this is a structure representing a c-level coroutine */	191	/* this is a structure representing a c-level coroutine */
115	typedef struct coro_cctx {	192	typedef struct coro_cctx {
116	struct coro_cctx *next;	193	struct coro_cctx *next;
117		194
118	/* the stack */	195	/* the stack */
119	void *sptr;	196	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	197	size_t ssize;
121		198
122	/* cpu state */	199	/* cpu state */
123	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 */
124	JMPENV *top_env;	202	JMPENV *top_env;
125	coro_context cctx;	203	coro_context cctx;
126		204
127	int inuse;
128
129	#if USE_VALGRIND	205	#if CORO_USE_VALGRIND
130	int valgrind_id;	206	int valgrind_id;
131	#endif	207	#endif
		208	unsigned char flags;
132	} coro_cctx;	209	} coro_cctx;
133		210
134	enum {	211	enum {
135	CF_RUNNING, /* coroutine is running */	212	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY, /* coroutine is ready */	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 */
137	};	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))
138		230
139	/* this is a structure representing a perl-level coroutine */	231	/* this is a structure representing a perl-level coroutine */
140	struct coro {	232	struct coro {
141	/* the c coroutine allocated to this perl coroutine, if any */	233	/* the c coroutine allocated to this perl coroutine, if any */
142	coro_cctx *cctx;	234	coro_cctx *cctx;
143		235
		236	/* process data */
		237	AV *mainstack;
		238	perl_slots slot; / basically the saved sp */
		239
144	/* data associated with this coroutine (initial args) */	240	AV args; / data associated with this coroutine (initial args) */
145	AV *args;	241	int refcnt; /* coroutines are refcounted, yes */
146	int refcnt;	242	int flags; /* CF_ flags */
147	int flags;	243	HV hv; / the perl hash associated with this coro, if any */
148		244
149	/* optionally saved, might be zero */	245	/* statistics */
150	AV *defav;	246	int usecount; /* number of transfers to this coro */
151	SV *defsv;
152	SV *errsv;
153
154	#define VAR(name,type) type name;
155	# include "state.h"
156	#undef VAR
157		247
158	/* coro process data */	248	/* coro process data */
159	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;
160	};	257	};
161		258
162	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
163	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
164		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
165	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 *
166	coro_clone_padlist (CV *cv)	311	coro_clone_padlist (pTHX_ CV *cv)
167	{	312	{
168	AV *padlist = CvPADLIST (cv);	313	AV *padlist = CvPADLIST (cv);
169	AV newpadlist, newpad;	314	AV newpadlist, newpad;
170		315
171	newpadlist = newAV ();	316	newpadlist = newAV ();
172	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
173	#if PERL_VERSION_ATLEAST (5,9,0)	318	#if PERL_VERSION_ATLEAST (5,10,0)
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#else	320	#else
176	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
177	#endif	322	#endif
178	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
183		328
184	return newpadlist;	329	return newpadlist;
185	}	330	}
186		331
187	static void	332	static void
188	free_padlist (AV *padlist)	333	free_padlist (pTHX_ AV *padlist)
189	{	334	{
190	/* may be during global destruction */	335	/* may be during global destruction */
191	if (SvREFCNT (padlist))	336	if (SvREFCNT (padlist))
192	{	337	{
193	I32 i = AvFILLp (padlist);	338	I32 i = AvFILLp (padlist);
…		…
214	AV *padlist;	359	AV *padlist;
215	AV av = (AV )mg->mg_obj;	360	AV av = (AV )mg->mg_obj;
216		361
217	/* casting is fun. */	362	/* casting is fun. */
218	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	363	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
219	free_padlist (padlist);	364	free_padlist (aTHX_ padlist);
220
221	SvREFCNT_dec (av);
222		365
223	return 0;	366	return 0;
224	}	367	}
225		368
226	#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
227		371
228	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	};
229		376
230	#define CORO_MAGIC(cv) \	377	#define CORO_MAGIC(sv,type) \
231	SvMAGIC (cv) \	378	SvMAGIC (sv) \
232	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	379	? SvMAGIC (sv)->mg_type == type \
233	? SvMAGIC (cv) \	380	? SvMAGIC (sv) \
234	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	381	: mg_find (sv, type) \
235	: 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))
236		412
237	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
238	static void	414	static void
239	get_padlist (CV *cv)	415	get_padlist (pTHX_ CV *cv)
240	{	416	{
241	MAGIC *mg = CORO_MAGIC (cv);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
242	AV *av;	418	AV *av;
243		419
244	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
245	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
246	else	422	else
247	{	423	{
248	#if 0	424	#if CORO_PREFER_PERL_FUNCTIONS
249	/* this is probably cleaner, but also slower? */	425	/* this is probably cleaner, but also slower? */
250	CV *cp = Perl_cv_clone (cv);	426	CV *cp = Perl_cv_clone (cv);
251	CvPADLIST (cv) = CvPADLIST (cp);	427	CvPADLIST (cv) = CvPADLIST (cp);
252	CvPADLIST (cp) = 0;	428	CvPADLIST (cp) = 0;
253	SvREFCNT_dec (cp);	429	SvREFCNT_dec (cp);
254	#else	430	#else
255	CvPADLIST (cv) = coro_clone_padlist (cv);	431	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
256	#endif	432	#endif
257	}	433	}
258	}	434	}
259		435
260	static void	436	static void
261	put_padlist (CV *cv)	437	put_padlist (pTHX_ CV *cv)
262	{	438	{
263	MAGIC *mg = CORO_MAGIC (cv);	439	MAGIC *mg = CORO_MAGIC_cv (cv);
264	AV *av;	440	AV *av;
265		441
266	if (!mg)	442	if (expect_false (!mg))
267	{	443	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
268	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
269	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
270	mg->mg_virtual = &vtbl_coro;
271	mg->mg_obj = (SV *)newAV ();
272	}
273		444
274	av = (AV *)mg->mg_obj;	445	av = (AV *)mg->mg_obj;
275		446
276	if (AvFILLp (av) >= AvMAX (av))	447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
277	av_extend (av, AvMAX (av) + 1);	448	av_extend (av, AvMAX (av) + 1);
278		449
279	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280	}	451	}
281		452
282	#define SB do {	453	/ load & save, init *****************************************************/
283	#define SE } while (0)
284
285	#define LOAD(state) load_state((state));
286	#define SAVE(state,flags) save_state((state),(flags));
287
288	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
289		454
290	static void	455	static void
291	load_state(Coro__State c)	456	load_perl (pTHX_ Coro__State c)
292	{	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
293	#define VAR(name,type) PL_ ## name = c->name;	468	#define VAR(name,type) PL_ ## name = slot->name;
294	# include "state.h"	469	# include "state.h"
295	#undef VAR	470	#undef VAR
296
297	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
298	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
299	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
300		471
301	{	472	{
302	dSP;	473	dSP;
		474
303	CV *cv;	475	CV *cv;
304		476
305	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
306	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
307	{	479	{
308	put_padlist (cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
309	CvDEPTH (cv) = PTR2IV (POPs);	481	CvDEPTH (cv) = PTR2IV (POPs);
310	CvPADLIST (cv) = (AV *)POPs;	482	CvPADLIST (cv) = (AV *)POPs;
311	}	483	}
312		484
313	PUTBACK;	485	PUTBACK;
314	}	486	}
315	}	487	}
316		488
317	static void	489	static void
318	save_state(Coro__State c, int flags)	490	save_perl (pTHX_ Coro__State c)
319	{	491	{
320	{	492	{
321	dSP;	493	dSP;
322	I32 cxix = cxstack_ix;	494	I32 cxix = cxstack_ix;
323	PERL_CONTEXT *ccstk = cxstack;	495	PERL_CONTEXT *ccstk = cxstack;
…		…
326	/*	498	/*
327	* 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
328	* (and reinitialize) all cv's in the whole callchain :(	500	* (and reinitialize) all cv's in the whole callchain :(
329	*/	501	*/
330		502
331	PUSHs (Nullsv);	503	XPUSHs (Nullsv);
332	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
333	for (;;)	505	for (;;)
334	{	506	{
335	while (cxix >= 0)	507	while (expect_true (cxix >= 0))
336	{	508	{
337	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
338		510
339	if (CxTYPE(cx) == CXt_SUB)	511	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
340	{	512	{
341	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
342		514
343	if (CvDEPTH (cv))	515	if (expect_true (CvDEPTH (cv)))
344	{	516	{
345	EXTEND (SP, 3);	517	EXTEND (SP, 3);
346
347	PUSHs ((SV *)CvPADLIST(cv));	518	PUSHs ((SV *)CvPADLIST (cv));
348	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
349	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
350		521
351	CvDEPTH (cv) = 0;	522	CvDEPTH (cv) = 0;
352	get_padlist (cv);	523	get_padlist (aTHX_ cv);
353	}	524	}
354	}	525	}
355	#ifdef CXt_FORMAT
356	else if (CxTYPE(cx) == CXt_FORMAT)
357	{
358	/* I never used formats, so how should I know how these are implemented? */
359	/* my bold guess is as a simple, plain sub... */
360	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
361	}
362	#endif
363	}	526	}
364		527
365	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
366	break;	529	break;
367		530
368	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
369	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
370	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
371	}	534	}
372		535
373	PUTBACK;	536	PUTBACK;
374	}	537	}
375		538
376	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	539	/* allocate some space on the context stack for our purposes */
377	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
378	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 */
379		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
380	#define VAR(name,type)c->name = PL_ ## name;	561	#define VAR(name,type) slot->name = PL_ ## name;
381	# include "state.h"	562	# include "state.h"
382	#undef VAR	563	#undef VAR
		564	}
383	}	565	}
384		566
385	/*	567	/*
386	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
387	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
388	* on the (sometimes correct) assumption that coroutines do	570	* on the (sometimes correct) assumption that coroutines do
389	* not usually need a lot of stackspace.	571	* not usually need a lot of stackspace.
390	*/	572	*/
		573	#if CORO_PREFER_PERL_FUNCTIONS
		574	# define coro_init_stacks init_stacks
		575	#else
391	static void	576	static void
392	coro_init_stacks ()	577	coro_init_stacks (pTHX)
393	{	578	{
394	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	579	PL_curstackinfo = new_stackinfo(32, 8);
395	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
396	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
397	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
398		583
399	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
400	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
401	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
402		587
403	New(50,PL_tmps_stack,128,SV*);	588	New(50,PL_tmps_stack,32,SV*);
404	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
405	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
406	PL_tmps_max = 128;	591	PL_tmps_max = 32;
407		592
408	New(54,PL_markstack,32,I32);	593	New(54,PL_markstack,16,I32);
409	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
410	PL_markstack_max = PL_markstack + 32;	595	PL_markstack_max = PL_markstack + 16;
411		596
412	#ifdef SET_MARK_OFFSET	597	#ifdef SET_MARK_OFFSET
413	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
414	#endif	599	#endif
415		600
416	New(54,PL_scopestack,32,I32);	601	New(54,PL_scopestack,8,I32);
417	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
418	PL_scopestack_max = 32;	603	PL_scopestack_max = 8;
419		604
420	New(54,PL_savestack,64,ANY);	605	New(54,PL_savestack,24,ANY);
421	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
422	PL_savestack_max = 64;	607	PL_savestack_max = 24;
423		608
424	#if !PERL_VERSION_ATLEAST (5,9,0)	609	#if !PERL_VERSION_ATLEAST (5,10,0)
425	New(54,PL_retstack,16,OP*);	610	New(54,PL_retstack,4,OP*);
426	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
427	PL_retstack_max = 16;	612	PL_retstack_max = 4;
428	#endif	613	#endif
429	}	614	}
		615	#endif
430		616
431	/*	617	/*
432	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
433	*/	619	*/
434	static void	620	static void
435	coro_destroy_stacks ()	621	coro_destroy_stacks (pTHX)
436	{	622	{
437	if (!IN_DESTRUCT)
438	{
439	/* is this ugly, I ask? */
440	LEAVE_SCOPE (0);
441
442	/* sure it is, but more important: is it correct?? :/ */
443	FREETMPS;
444
445	/POPSTACK_TO (PL_mainstack);//D//use/
446	}
447
448	while (PL_curstackinfo->si_next)	623	while (PL_curstackinfo->si_next)
449	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
450		625
451	while (PL_curstackinfo)	626	while (PL_curstackinfo)
452	{	627	{
453	PERL_SI *p = PL_curstackinfo->si_prev;	628	PERL_SI *p = PL_curstackinfo->si_prev;
454		629
455	{ /D//remove/
456	dSP;
457	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
458	PUTBACK; /* possibly superfluous */
459	}
460
461	if (!IN_DESTRUCT)	630	if (!IN_DESTRUCT)
462	{
463	dounwind (-1);/D//remove/
464	SvREFCNT_dec (PL_curstackinfo->si_stack);	631	SvREFCNT_dec (PL_curstackinfo->si_stack);
465	}
466		632
467	Safefree (PL_curstackinfo->si_cxstack);	633	Safefree (PL_curstackinfo->si_cxstack);
468	Safefree (PL_curstackinfo);	634	Safefree (PL_curstackinfo);
469	PL_curstackinfo = p;	635	PL_curstackinfo = p;
470	}	636	}
471		637
472	Safefree (PL_tmps_stack);	638	Safefree (PL_tmps_stack);
473	Safefree (PL_markstack);	639	Safefree (PL_markstack);
474	Safefree (PL_scopestack);	640	Safefree (PL_scopestack);
475	Safefree (PL_savestack);	641	Safefree (PL_savestack);
476	#if !PERL_VERSION_ATLEAST (5,9,0)	642	#if !PERL_VERSION_ATLEAST (5,10,0)
477	Safefree (PL_retstack);	643	Safefree (PL_retstack);
478	#endif	644	#endif
479	}	645	}
480		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
481	static void	777	static void
482	setup_coro (struct coro *coro)	778	coro_setup (pTHX_ struct coro *coro)
483	{	779	{
484	/*	780	/*
485	* emulate part of the perl startup here.	781	* emulate part of the perl startup here.
486	*/	782	*/
487
488	coro_init_stacks ();	783	coro_init_stacks (aTHX);
489		784
		785	PL_runops = RUNOPS_DEFAULT;
		786	PL_curcop = &PL_compiling;
		787	PL_in_eval = EVAL_NULL;
490	PL_curcop = 0;	788	PL_comppad = 0;
491	PL_in_eval = 0;
492	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);
493		808
494	{	809	{
495	dSP;	810	dSP;
496	LOGOP myop;	811	LOGOP myop;
497		812
498	/* I have no idea why this is needed, but it is */
499	PUSHMARK (SP);
500
501	SvREFCNT_dec (GvAV (PL_defgv));
502	GvAV (PL_defgv) = coro->args; coro->args = 0;
503
504	Zero (&myop, 1, LOGOP);	813	Zero (&myop, 1, LOGOP);
505	myop.op_next = Nullop;	814	myop.op_next = Nullop;
506	myop.op_flags = OPf_WANT_VOID;	815	myop.op_flags = OPf_WANT_VOID;
507		816
		817	PUSHMARK (SP);
		818	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		819	PUTBACK;
508	PL_op = (OP *)&myop;	820	PL_op = (OP *)&myop;
509
510	PUSHMARK (SP);
511	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
512	PUTBACK;
513	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	821	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
514	SPAGAIN;	822	SPAGAIN;
515
516	ENTER; /* necessary e.g. for dounwind */
517	}	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;
518	}	831	}
519		832
520	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
521	free_coro_mortal ()	870	free_coro_mortal (pTHX)
522	{	871	{
523	if (coro_mortal)	872	if (expect_true (coro_mortal))
524	{	873	{
525	SvREFCNT_dec (coro_mortal);	874	SvREFCNT_dec (coro_mortal);
526	coro_mortal = 0;	875	coro_mortal = 0;
527	}	876	}
528	}	877	}
529		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 */
530	static void NOINLINE	1006	static void NOINLINE
531	prepare_cctx (coro_cctx *cctx)	1007	cctx_prepare (pTHX_ coro_cctx *cctx)
532	{	1008	{
533	dSP;	1009	dSP;
534	LOGOP myop;	1010	LOGOP myop;
535		1011
		1012	PL_top_env = &PL_start_env;
		1013
		1014	if (cctx->flags & CC_TRACE)
		1015	PL_runops = runops_trace;
		1016
536	Zero (&myop, 1, LOGOP);	1017	Zero (&myop, 1, LOGOP);
537	myop.op_next = PL_op;	1018	myop.op_next = PL_op;
538	myop.op_flags = OPf_WANT_VOID;	1019	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
539
540	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
541		1020
542	PUSHMARK (SP);	1021	PUSHMARK (SP);
		1022	EXTEND (SP, 2);
		1023	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
543	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	1024	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
544	PUTBACK;	1025	PUTBACK;
		1026	PL_op = (OP *)&myop;
545	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	1027	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
546	SPAGAIN;	1028	SPAGAIN;
547	}	1029	}
548		1030
		1031	/*
		1032	* this is a _very_ stripped down perl interpreter ;)
		1033	*/
549	static void	1034	static void
550	coro_run (void *arg)	1035	cctx_run (void *arg)
551	{	1036	{
		1037	dTHX;
		1038
552	/* coro_run is the alternative epilogue of transfer() */	1039	/* cctx_run is the alternative tail of transfer(), so unlock here. */
553	UNLOCK;	1040	UNLOCK;
554		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
555	/*	1052	/*
556	* 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
557	*/	1058	*/
558	PL_top_env = &PL_start_env;	1059	PL_top_env = main_top_env;
559		1060	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
560	/* inject call to cctx_init */
561	prepare_cctx ((coro_cctx *)arg);
562
563	/* somebody will hit me for both perl_run and PL_restartop */
564	perl_run (PL_curinterp);
565
566	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
567	abort ();
568	}	1061	}
569		1062
570	static coro_cctx *	1063	static coro_cctx *
571	cctx_new ()	1064	cctx_new ()
572	{	1065	{
573	coro_cctx *cctx;	1066	coro_cctx *cctx;
		1067	void *stack_start;
		1068	size_t stack_size;
574		1069
575	++cctx_count;	1070	++cctx_count;
576		1071
577	New (0, cctx, 1, coro_cctx);	1072	Newz (0, cctx, 1, coro_cctx);
578		1073
579	#if HAVE_MMAP	1074	#if HAVE_MMAP
580
581	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1075	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
582	/* mmap suppsedly does allocate-on-write for us */	1076	/* mmap supposedly does allocate-on-write for us */
583	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);
584		1078
585	if (cctx->sptr == (void *)-1)	1079	if (cctx->sptr != (void *)-1)
586	{
587	perror ("FATAL: unable to mmap stack for coroutine");
588	_exit (EXIT_FAILURE);
589	}	1080	{
590
591	# if STACKGUARD	1081	# if CORO_STACKGUARD
592	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1082	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
593	# 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);
594		1093
595	#else
596
597	cctx->ssize = STACKSIZE * (long)sizeof (long);
598	New (0, cctx->sptr, STACKSIZE, long);
599
600	if (!cctx->sptr)	1094	if (!cctx->sptr)
601	{	1095	{
602	perror ("FATAL: unable to malloc stack for coroutine");	1096	perror ("FATAL: unable to allocate stack for coroutine");
603	_exit (EXIT_FAILURE);	1097	_exit (EXIT_FAILURE);
604	}	1098	}
605		1099
606	#endif	1100	stack_start = cctx->sptr;
		1101	stack_size = cctx->ssize;
		1102	}
607		1103
608	#if USE_VALGRIND	1104	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
609	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1105	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
610	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
611	cctx->ssize + (char *)cctx->sptr
612	);
613	#endif
614
615	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
616		1106
617	return cctx;	1107	return cctx;
618	}	1108	}
619		1109
620	static void	1110	static void
…		…
623	if (!cctx)	1113	if (!cctx)
624	return;	1114	return;
625		1115
626	--cctx_count;	1116	--cctx_count;
627		1117
628	#if USE_VALGRIND	1118	#if CORO_USE_VALGRIND
629	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1119	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
630	#endif	1120	#endif
631		1121
632	#if HAVE_MMAP	1122	#if HAVE_MMAP
		1123	if (cctx->flags & CC_MAPPED)
633	munmap (cctx->sptr, cctx->ssize);	1124	munmap (cctx->sptr, cctx->ssize);
634	#else	1125	else
		1126	#endif
635	Safefree (cctx->sptr);	1127	Safefree (cctx->sptr);
636	#endif
637		1128
638	Safefree (cctx);	1129	Safefree (cctx);
639	}	1130	}
640		1131
		1132	/* wether this cctx should be destructed */
		1133	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1134
641	static coro_cctx *	1135	static coro_cctx *
642	cctx_get ()	1136	cctx_get (pTHX)
643	{	1137	{
644	coro_cctx *cctx;	1138	while (expect_true (cctx_first))
645
646	if (cctx_first)
647	{	1139	{
648	cctx = cctx_first;	1140	coro_cctx *cctx = cctx_first;
649	cctx_first = cctx->next;	1141	cctx_first = cctx->next;
650	--cctx_idle;	1142	--cctx_idle;
651	}	1143
652	else	1144	if (expect_true (!CCTX_EXPIRED (cctx)))
653	{	1145	return cctx;
654	cctx = cctx_new ();	1146
655	PL_op = PL_op->op_next;	1147	cctx_destroy (cctx);
656	}	1148	}
657		1149
658	return cctx;	1150	return cctx_new ();
659	}	1151	}
660		1152
661	static void	1153	static void
662	cctx_put (coro_cctx *cctx)	1154	cctx_put (coro_cctx *cctx)
663	{	1155	{
664	/* free another cctx if overlimit */	1156	/* free another cctx if overlimit */
665	if (cctx_idle >= MAX_IDLE_CCTX)	1157	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
666	{	1158	{
667	coro_cctx *first = cctx_first;	1159	coro_cctx *first = cctx_first;
668	cctx_first = first->next;	1160	cctx_first = first->next;
669	--cctx_idle;	1161	--cctx_idle;
670		1162
671	assert (!first->inuse);
672	cctx_destroy (first);	1163	cctx_destroy (first);
673	}	1164	}
674		1165
675	++cctx_idle;	1166	++cctx_idle;
676	cctx->next = cctx_first;	1167	cctx->next = cctx_first;
677	cctx_first = cctx;	1168	cctx_first = cctx;
678	}	1169	}
679		1170
680	/* 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 */
681	static void NOINLINE	1195	static void NOINLINE
682	transfer (struct coro prev, struct coro next, int flags)	1196	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
683	{	1197	{
684	dSTACKLEVEL;	1198	dSTACKLEVEL;
		1199	static volatile int has_throw;
685		1200
686	/* sometimes transfer is only called to set idle_sp */	1201	/* sometimes transfer is only called to set idle_sp */
687	if (flags == TRANSFER_SET_STACKLEVEL)	1202	if (expect_false (!next))
		1203	{
688	((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	}
689	else if (prev != next)	1207	else if (expect_true (prev != next))
690	{	1208	{
691	coro_cctx *prev__cctx;	1209	coro_cctx *prev__cctx;
692		1210
693	if (!prev->cctx)	1211	if (expect_false (prev->flags & CF_NEW))
694	{	1212	{
695	/* create a new empty context */	1213	/* create a new empty context */
696	Newz (0, prev->cctx, 1, coro_cctx);	1214	Newz (0, prev->cctx, 1, coro_cctx);
697	prev->cctx->inuse = 1;	1215	prev->flags &= ~CF_NEW;
698	prev->flags \|= CF_RUNNING;	1216	prev->flags \|= CF_RUNNING;
699	}	1217	}
700
701	if (!prev->flags & CF_RUNNING)
702	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
703
704	if (next->flags & CF_RUNNING)
705	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
706		1218
707	prev->flags &= ~CF_RUNNING;	1219	prev->flags &= ~CF_RUNNING;
708	next->flags \|= CF_RUNNING;	1220	next->flags \|= CF_RUNNING;
709		1221
710	LOCK;	1222	LOCK;
711		1223
712	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))
713	{	1228	{
714	/* coroutine already started */	1229	/* need to start coroutine */
715	SAVE (prev, flags);	1230	next->flags &= ~CF_NEW;
716	LOAD (next);	1231	/* setup coroutine call */
		1232	coro_setup (aTHX_ next);
717	}	1233	}
718	else	1234	else
719	{	1235	load_perl (aTHX_ next);
720	/* need to start coroutine */
721	/* first get rid of the old state */
722	SAVE (prev, -1);
723	/* setup coroutine call */
724	setup_coro (next);
725	/* need a new stack */
726	assert (!next->stack);
727	}
728		1236
729	prev__cctx = prev->cctx;	1237	prev__cctx = prev->cctx;
730		1238
731	/* possibly "free" the cctx */	1239	/* possibly "free" the cctx */
		1240	if (expect_true (
732	if (prev__cctx->idle_sp == STACKLEVEL)	1241	prev__cctx->idle_sp == STACKLEVEL
		1242	&& !(prev__cctx->flags & CC_TRACE)
		1243	&& !force_cctx
		1244	))
733	{	1245	{
734	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1246	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
735	assert (PL_top_env == prev__cctx->top_env);	1247	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1248
		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);
736		1256
737	cctx_put (prev__cctx);	1257	cctx_put (prev__cctx);
738	prev->cctx = 0;
739	}	1258	}
740		1259
		1260	++next->usecount;
		1261
741	if (!next->cctx)	1262	if (expect_true (!next->cctx))
742	next->cctx = cctx_get ();	1263	next->cctx = cctx_get (aTHX);
743		1264
		1265	has_throw = !!next->throw;
		1266
744	if (prev__cctx != next->cctx)	1267	if (expect_false (prev__cctx != next->cctx))
745	{	1268	{
746	assert ( prev__cctx->inuse);
747	assert (!next->cctx->inuse);
748
749	prev__cctx->inuse = 0;
750	next->cctx->inuse = 1;
751
752	prev__cctx->top_env = PL_top_env;	1269	prev__cctx->top_env = PL_top_env;
753	PL_top_env = next->cctx->top_env;	1270	PL_top_env = next->cctx->top_env;
754	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1271	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
755	}	1272	}
756		1273
757	free_coro_mortal ();	1274	free_coro_mortal (aTHX);
758
759	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	}
760	}	1289	}
761	}	1290	}
762		1291
763	struct transfer_args	1292	struct transfer_args
764	{	1293	{
765	struct coro prev, next;	1294	struct coro prev, next;
766	int flags;
767	};	1295	};
768		1296
		1297	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
769	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1298	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
770		1299
		1300	/ high level stuff ******************************************************/
		1301
771	static void	1302	static int
772	coro_state_destroy (struct coro *coro)	1303	coro_state_destroy (pTHX_ struct coro *coro)
773	{	1304	{
774	if (coro->refcnt--)	1305	if (coro->flags & CF_DESTROYED)
775	return;	1306	return 0;
776		1307
		1308	coro->flags \|= CF_DESTROYED;
		1309
777	if (coro->flags & CF_RUNNING)	1310	if (coro->flags & CF_READY)
778	croak ("FATAL: tried to destroy currently running coroutine");	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 */
779		1320
780	if (coro->mainstack && coro->mainstack != main_mainstack)	1321	if (coro->mainstack && coro->mainstack != main_mainstack)
781	{	1322	{
782	struct coro temp;	1323	struct coro temp;
783		1324
784	SAVE ((&temp), TRANSFER_SAVE_ALL);	1325	if (coro->flags & CF_RUNNING)
785	LOAD (coro);	1326	croak ("FATAL: tried to destroy currently running coroutine");
786		1327
787	coro_destroy_stacks ();	1328	save_perl (aTHX_ &temp);
		1329	load_perl (aTHX_ coro);
788		1330
789	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1331	coro_destroy (aTHX_ coro);
790		1332
		1333	load_perl (aTHX_ &temp);
		1334
791	coro->mainstack = 0;	1335	coro->slot = 0;
792	}	1336	}
793		1337
794	cctx_destroy (coro->cctx);	1338	cctx_destroy (coro->cctx);
795	SvREFCNT_dec (coro->args);	1339	SvREFCNT_dec (coro->args);
796	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;
797	}	1346	}
798		1347
799	static int	1348	static int
800	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1349	coro_state_free (pTHX_ SV sv, MAGIC mg)
801	{	1350	{
802	struct coro coro = (struct coro )mg->mg_ptr;	1351	struct coro coro = (struct coro )mg->mg_ptr;
803	mg->mg_ptr = 0;	1352	mg->mg_ptr = 0;
804		1353
		1354	coro->hv = 0;
		1355
		1356	if (--coro->refcnt < 0)
		1357	{
805	coro_state_destroy (coro);	1358	coro_state_destroy (aTHX_ coro);
		1359	Safefree (coro);
		1360	}
806		1361
807	return 0;	1362	return 0;
808	}	1363	}
809		1364
810	static int	1365	static int
…		…
817	return 0;	1372	return 0;
818	}	1373	}
819		1374
820	static MGVTBL coro_state_vtbl = {	1375	static MGVTBL coro_state_vtbl = {
821	0, 0, 0, 0,	1376	0, 0, 0, 0,
822	coro_state_clear,	1377	coro_state_free,
823	0,	1378	0,
824	#ifdef MGf_DUP	1379	#ifdef MGf_DUP
825	coro_state_dup,	1380	coro_state_dup,
826	#else	1381	#else
827	# define MGf_DUP 0	1382	# define MGf_DUP 0
828	#endif	1383	#endif
829	};	1384	};
830		1385
831	static struct coro *
832	SvSTATE (SV *coro)
833	{
834	HV *stash;
835	MAGIC *mg;
836
837	if (SvROK (coro))
838	coro = SvRV (coro);
839
840	stash = SvSTASH (coro);
841	if (stash != coro_stash && stash != coro_state_stash)
842	{
843	/* very slow, but rare, check */
844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845	croak ("Coro::State object required");
846	}
847
848	mg = SvMAGIC (coro);
849	assert (mg->mg_type == PERL_MAGIC_ext);
850	return (struct coro *)mg->mg_ptr;
851	}
852
853	static void	1386	static void
854	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)
855	{	1388	{
856	ta->prev = SvSTATE (prev);	1389	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	1390	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;	1391	TRANSFER_CHECK (*ta);
859	}	1392	}
860		1393
861	static void	1394	static void
862	api_transfer (SV prev, SV next, int flags)	1395	api_transfer (SV prev_sv, SV next_sv)
863	{	1396	{
864	dTHX;	1397	dTHX;
865	struct transfer_args ta;	1398	struct transfer_args ta;
866		1399
867	prepare_transfer (&ta, prev, next, flags);	1400	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	1401	TRANSFER (ta, 1);
869	}	1402	}
870		1403
871	/ Coro ******************************************************************/	1404	/ Coro ******************************************************************/
872		1405
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV coro_current, coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	1406	static void
886	coro_enq (SV *coro_sv)	1407	coro_enq (pTHX_ SV *coro_sv)
887	{	1408	{
888	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1409	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
889	coro_nready++;
890	}	1410	}
891		1411
892	static SV *	1412	static SV *
893	coro_deq (int min_prio)	1413	coro_deq (pTHX)
894	{	1414	{
895	int prio = PRIO_MAX - PRIO_MIN;	1415	int prio;
896		1416
897	min_prio -= PRIO_MIN;
898	if (min_prio < 0)
899	min_prio = 0;
900
901	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1417	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
902	if (AvFILLp (coro_ready [prio]) >= 0)	1418	if (AvFILLp (coro_ready [prio]) >= 0)
903	{
904	coro_nready--;
905	return av_shift (coro_ready [prio]);	1419	return av_shift (coro_ready [prio]);
906	}
907		1420
908	return 0;	1421	return 0;
909	}	1422	}
910		1423
911	static int	1424	static int
912	api_ready (SV *coro_sv)	1425	api_ready (SV *coro_sv)
913	{	1426	{
		1427	dTHX;
914	struct coro *coro;	1428	struct coro *coro;
		1429	SV *sv_hook;
		1430	void (*xs_hook)(void);
915		1431
916	if (SvROK (coro_sv))	1432	if (SvROK (coro_sv))
917	coro_sv = SvRV (coro_sv);	1433	coro_sv = SvRV (coro_sv);
918		1434
919	coro = SvSTATE (coro_sv);	1435	coro = SvSTATE (coro_sv);
920		1436
921	if (coro->flags & CF_READY)	1437	if (coro->flags & CF_READY)
922	return 0;	1438	return 0;
923		1439
924	if (coro->flags & CF_RUNNING)
925	croak ("Coro::ready called on currently running coroutine");
926
927	coro->flags \|= CF_READY;	1440	coro->flags \|= CF_READY;
928		1441
929	LOCK;	1442	LOCK;
		1443
		1444	sv_hook = coro_nready ? 0 : coro_readyhook;
		1445	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1446
930	coro_enq (SvREFCNT_inc (coro_sv));	1447	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1448	++coro_nready;
		1449
931	UNLOCK;	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 ();
932		1470
933	return 1;	1471	return 1;
934	}	1472	}
935		1473
936	static int	1474	static int
937	api_is_ready (SV *coro_sv)	1475	api_is_ready (SV *coro_sv)
938	{	1476	{
		1477	dTHX;
939	return !!SvSTATE (coro_sv)->flags & CF_READY;	1478	return !!(SvSTATE (coro_sv)->flags & CF_READY);
940	}	1479	}
941		1480
942	static void	1481	static void
943	prepare_schedule (struct transfer_args *ta)	1482	prepare_schedule (pTHX_ struct transfer_args *ta)
944	{	1483	{
945	SV current, prev, *next;	1484	SV prev_sv, next_sv;
946
947	current = GvSV (coro_current);
948		1485
949	for (;;)	1486	for (;;)
950	{	1487	{
951	LOCK;	1488	LOCK;
952	next = coro_deq (PRIO_MIN);	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;
953	UNLOCK;	1522	UNLOCK;
954
955	if (next)
956	break;	1523	break;
957
958	{
959	dSP;
960
961	ENTER;
962	SAVETMPS;
963
964	PUSHMARK (SP);
965	PUTBACK;
966	call_sv (GvSV (coro_idle), G_DISCARD);
967
968	FREETMPS;
969	LEAVE;
970	}	1524	}
971	}
972
973	prev = SvRV (current);
974	SvRV (current) = next;
975		1525
976	/* free this only after the transfer */	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);
		1533
977	LOCK;	1534	LOCK;
978	free_coro_mortal ();	1535	free_coro_mortal (aTHX);
		1536	coro_mortal = prev_sv;
979	UNLOCK;	1537	UNLOCK;
980	coro_mortal = prev;
981
982	ta->prev = SvSTATE (prev);
983	ta->next = SvSTATE (next);
984	ta->flags = TRANSFER_SAVE_ALL;
985
986	ta->next->flags &= ~CF_READY;
987	}	1538	}
988		1539
989	static void	1540	static void
990	prepare_cede (struct transfer_args *ta)	1541	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1542	{
992	api_ready (GvSV (coro_current));	1543	api_ready (coro_current);
993
994	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;
995	}	1559	}
996		1560
997	static void	1561	static void
998	api_schedule (void)	1562	api_schedule (void)
999	{	1563	{
1000	dTHX;	1564	dTHX;
1001	struct transfer_args ta;	1565	struct transfer_args ta;
1002		1566
1003	prepare_schedule (&ta);	1567	prepare_schedule (aTHX_ &ta);
1004	TRANSFER (ta);	1568	TRANSFER (ta, 1);
1005	}	1569	}
1006		1570
1007	static void	1571	static int
1008	api_cede (void)	1572	api_cede (void)
1009	{	1573	{
1010	dTHX;	1574	dTHX;
1011	struct transfer_args ta;	1575	struct transfer_args ta;
1012		1576
1013	prepare_cede (&ta);	1577	prepare_cede (aTHX_ &ta);
		1578
		1579	if (expect_true (ta.prev != ta.next))
		1580	{
1014	TRANSFER (ta);	1581	TRANSFER (ta, 1);
		1582	return 1;
		1583	}
		1584	else
		1585	return 0;
1015	}	1586	}
1016		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
1017	MODULE = Coro::State PACKAGE = Coro::State	1629	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1018		1630
1019	PROTOTYPES: DISABLE	1631	PROTOTYPES: DISABLE
1020		1632
1021	BOOT:	1633	BOOT:
1022	{	1634	{
1023	#ifdef USE_ITHREADS	1635	#ifdef USE_ITHREADS
1024	MUTEX_INIT (&coro_mutex);	1636	MUTEX_INIT (&coro_mutex);
1025	#endif	1637	#endif
1026	BOOT_PAGESIZE;	1638	BOOT_PAGESIZE;
1027		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
1028	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1651	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029		1652
1030	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1653	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1031	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1654	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1032	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));
1033		1657
1034	main_mainstack = PL_mainstack;	1658	main_mainstack = PL_mainstack;
		1659	main_top_env = PL_top_env;
1035		1660
		1661	while (main_top_env->je_prev)
		1662	main_top_env = main_top_env->je_prev;
		1663
1036	coroapi.ver = CORO_API_VERSION;	1664	coroapi.ver = CORO_API_VERSION;
		1665	coroapi.rev = CORO_API_REVISION;
1037	coroapi.transfer = api_transfer;	1666	coroapi.transfer = api_transfer;
1038		1667
1039	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1668	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1040	}	1669	}
1041		1670
1042	SV *	1671	SV *
1043	new (char *klass, ...)	1672	new (char *klass, ...)
1044	CODE:	1673	CODE:
1045	{	1674	{
1046	struct coro *coro;	1675	struct coro *coro;
		1676	MAGIC *mg;
1047	HV *hv;	1677	HV *hv;
1048	int i;	1678	int i;
1049		1679
1050	Newz (0, coro, 1, struct coro);	1680	Newz (0, coro, 1, struct coro);
1051	coro->args = newAV ();	1681	coro->args = newAV ();
		1682	coro->flags = CF_NEW;
1052		1683
		1684	if (coro_first) coro_first->prev = coro;
		1685	coro->next = coro_first;
		1686	coro_first = coro;
		1687
1053	hv = newHV ();	1688	coro->hv = hv = newHV ();
1054	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;
1055	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1691	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056		1692
		1693	av_extend (coro->args, items - 1);
1057	for (i = 1; i < items; i++)	1694	for (i = 1; i < items; i++)
1058	av_push (coro->args, newSVsv (ST (i)));	1695	av_push (coro->args, newSVsv (ST (i)));
1059	}	1696	}
1060	OUTPUT:	1697	OUTPUT:
1061	RETVAL	1698	RETVAL
1062		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
1063	void	1703	void
1064	_set_stacklevel (...)	1704	_set_stacklevel (...)
1065	ALIAS:	1705	ALIAS:
1066	Coro::State::transfer = 1	1706	Coro::State::transfer = 1
1067	Coro::schedule = 2	1707	Coro::schedule = 2
1068	Coro::cede = 3	1708	Coro::cede = 3
1069	Coro::Cont::yield = 4	1709	Coro::cede_notself = 4
1070	CODE:	1710	CODE:
1071	{	1711	{
1072	struct transfer_args ta;	1712	struct transfer_args ta;
1073		1713
		1714	PUTBACK;
1074	switch (ix)	1715	switch (ix)
1075	{	1716	{
1076	case 0:	1717	case 0:
1077	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1718	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1078	ta.next = 0;	1719	ta.next = 0;
1079	ta.flags = TRANSFER_SET_STACKLEVEL;
1080	break;	1720	break;
1081		1721
1082	case 1:	1722	case 1:
1083	if (items != 3)	1723	if (items != 2)
1084	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);
1085		1725
1086	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1726	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1087	break;	1727	break;
1088		1728
1089	case 2:	1729	case 2:
1090	prepare_schedule (&ta);	1730	prepare_schedule (aTHX_ &ta);
1091	break;	1731	break;
1092		1732
1093	case 3:	1733	case 3:
1094	prepare_cede (&ta);	1734	prepare_cede (aTHX_ &ta);
1095	break;	1735	break;
1096		1736
1097	case 4:	1737	case 4:
1098	{	1738	if (!prepare_cede_notself (aTHX_ &ta))
1099	SV *yieldstack;	1739	XSRETURN_EMPTY;
1100	SV *sv;
1101	AV *defav = GvAV (PL_defgv);
1102		1740
1103	yieldstack = *hv_fetch (
1104	(HV *)SvRV (GvSV (coro_current)),
1105	"yieldstack", sizeof ("yieldstack") - 1,
1106	0
1107	);
1108
1109	/* set up @_ -- ugly */
1110	av_clear (defav);
1111	av_fill (defav, items - 1);
1112	while (items--)
1113	av_store (defav, items, SvREFCNT_inc (ST(items)));
1114
1115	sv = av_pop ((AV *)SvRV (yieldstack));
1116	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1117	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1118	ta.flags = 0;
1119	SvREFCNT_dec (sv);
1120	}
1121	break;	1741	break;
1122
1123	}	1742	}
		1743	SPAGAIN;
1124		1744
		1745	BARRIER;
		1746	PUTBACK;
1125	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 */
1126	}	1750	}
		1751
		1752	bool
		1753	_destroy (SV *coro_sv)
		1754	CODE:
		1755	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1756	OUTPUT:
		1757	RETVAL
1127		1758
1128	void	1759	void
1129	_clone_state_from (SV dst, SV src)
1130	CODE:
1131	{
1132	struct coro *coro_src = SvSTATE (src);
1133
1134	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1135
1136	++coro_src->refcnt;
1137	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1138	}
1139
1140	void
1141	_exit (code)	1760	_exit (int code)
1142	int code
1143	PROTOTYPE: $	1761	PROTOTYPE: $
1144	CODE:	1762	CODE:
1145	_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
1146		1773
1147	int	1774	int
1148	cctx_count ()	1775	cctx_count ()
1149	CODE:	1776	CODE:
1150	RETVAL = cctx_count;	1777	RETVAL = cctx_count;
…		…
1156	CODE:	1783	CODE:
1157	RETVAL = cctx_idle;	1784	RETVAL = cctx_idle;
1158	OUTPUT:	1785	OUTPUT:
1159	RETVAL	1786	RETVAL
1160		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
1161	MODULE = Coro::State PACKAGE = Coro	1896	MODULE = Coro::State PACKAGE = Coro
1162		1897
1163	BOOT:	1898	BOOT:
1164	{	1899	{
1165	int i;	1900	int i;
1166		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
1167	coro_stash = gv_stashpv ("Coro", TRUE);	1909	coro_stash = gv_stashpv ("Coro", TRUE);
1168		1910
1169	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1911	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1170	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1912	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1171	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1913	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1172	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1914	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1173	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1915	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1174	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1916	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1175		1917
1176	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1177	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1178
1179	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1918	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1180	coro_ready[i] = newAV ();	1919	coro_ready[i] = newAV ();
1181		1920
1182	{	1921	{
1183	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 */
1184		1924
1185	coroapi.schedule = api_schedule;	1925	coroapi.schedule = api_schedule;
1186	coroapi.cede = api_cede;	1926	coroapi.cede = api_cede;
		1927	coroapi.cede_notself = api_cede_notself;
1187	coroapi.ready = api_ready;	1928	coroapi.ready = api_ready;
1188	coroapi.is_ready = api_is_ready;	1929	coroapi.is_ready = api_is_ready;
1189	coroapi.nready = &coro_nready;	1930	coroapi.nready = &coro_nready;
1190	coroapi.current = coro_current;	1931	coroapi.current = coro_current;
1191		1932
1192	GCoroAPI = &coroapi;	1933	GCoroAPI = &coroapi;
1193	sv_setiv (sv, (IV)&coroapi);	1934	sv_setiv (sv, (IV)&coroapi);
1194	SvREADONLY_on (sv);	1935	SvREADONLY_on (sv);
1195	}	1936	}
1196	}	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;
1197		1954
1198	int	1955	int
1199	prio (Coro::State coro, int newprio = 0)	1956	prio (Coro::State coro, int newprio = 0)
1200	ALIAS:	1957	ALIAS:
1201	nice = 1	1958	nice = 1
…		…
1204	RETVAL = coro->prio;	1961	RETVAL = coro->prio;
1205		1962
1206	if (items > 1)	1963	if (items > 1)
1207	{	1964	{
1208	if (ix)	1965	if (ix)
1209	newprio += coro->prio;	1966	newprio = coro->prio - newprio;
1210		1967
1211	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1968	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1212	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1969	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1213		1970
1214	coro->prio = newprio;	1971	coro->prio = newprio;
1215	}	1972	}
1216	}	1973	}
		1974	OUTPUT:
		1975	RETVAL
1217		1976
1218	SV *	1977	SV *
1219	ready (SV *self)	1978	ready (SV *self)
1220	PROTOTYPE: $	1979	PROTOTYPE: $
1221	CODE:	1980	CODE:
1222	RETVAL = boolSV (api_ready (self));	1981	RETVAL = boolSV (api_ready (self));
1223	OUTPUT:	1982	OUTPUT:
1224	RETVAL	1983	RETVAL
1225		1984
1226	SV *
1227	is_ready (SV *self)
1228	PROTOTYPE: $
1229	CODE:
1230	RETVAL = boolSV (api_is_ready (self));
1231	OUTPUT:
1232	RETVAL
1233
1234	int	1985	int
1235	nready (...)	1986	nready (...)
1236	PROTOTYPE:	1987	PROTOTYPE:
1237	CODE:	1988	CODE:
1238	RETVAL = coro_nready;	1989	RETVAL = coro_nready;
1239	OUTPUT:	1990	OUTPUT:
1240	RETVAL	1991	RETVAL
1241		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
1242	MODULE = Coro::State PACKAGE = Coro::AIO	2086	MODULE = Coro::State PACKAGE = Coro::AIO
1243		2087
1244	SV *	2088	SV *
1245	_get_state ()	2089	_get_state ()
1246	CODE:	2090	CODE:
1247	{	2091	{
1248	struct {	2092	struct io_state *data;
1249	int errorno;
1250	int laststype;
1251	int laststatval;
1252	Stat_t statcache;
1253	} data;
1254		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
1255	data.errorno = errno;	2099	data->errorno = errno;
1256	data.laststype = PL_laststype;	2100	data->laststype = PL_laststype;
1257	data.laststatval = PL_laststatval;	2101	data->laststatval = PL_laststatval;
1258	data.statcache = PL_statcache;	2102	data->statcache = PL_statcache;
1259
1260	RETVAL = newSVpvn ((char *)&data, sizeof data);
1261	}	2103	}
1262	OUTPUT:	2104	OUTPUT:
1263	RETVAL	2105	RETVAL
1264		2106
1265	void	2107	void
1266	_set_state (char *data_)	2108	_set_state (char *data_)
1267	PROTOTYPE: $	2109	PROTOTYPE: $
1268	CODE:	2110	CODE:
1269	{	2111	{
1270	struct {	2112	struct io_state data = (void )data_;
1271	int errorno;
1272	int laststype;
1273	int laststatval;
1274	Stat_t statcache;
1275	} data = (void )data_;
1276		2113
1277	errno = data->errorno;	2114	errno = data->errorno;
1278	PL_laststype = data->laststype;	2115	PL_laststype = data->laststype;
1279	PL_laststatval = data->laststatval;	2116	PL_laststatval = data->laststatval;
1280	PL_statcache = data->statcache;	2117	PL_statcache = data->statcache;
1281	}	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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Comparing Coro/Coro/State.xs (file contents): Revision 1.116 by root, Fri Dec 1 14:01:43 2006 UTC vs. Revision 1.239 by root, Sat Jun 28 23:14:19 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.116 by root, Fri Dec 1 14:01:43 2006 UTC vs.
Revision 1.239 by root, Sat Jun 28 23:14:19 2008 UTC