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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.138 by root, Sun Jan 14 20:49:45 2007 UTC vs.
Revision 1.223 by root, Wed Feb 13 15:46:00 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	#include <stdio.h>	12	#include <stdio.h>
10	#include <errno.h>	13	#include <errno.h>
11	#include <assert.h>	14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
12		16
13	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
14	# include <unistd.h>	18	# include <unistd.h>
15	# include <sys/mman.h>	19	# include <sys/mman.h>
16	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
31	#else	35	#else
32	# define PAGESIZE 0	36	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
34	#endif	38	#endif
35		39
36	#if USE_VALGRIND	40	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
38	#endif	45	#endif
39		46
40	/* the maximum number of idle cctx that will be pooled */	47	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	48	#define MAX_IDLE_CCTX 8
42		49
…		…
65	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
66	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
67	# endif	74	# endif
68	#endif	75	#endif
69		76
		77	/* 5.8.8 */
		78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
70	/* 5.8.7 */	90	/* 5.8.7 */
71	#ifndef SvRV_set	91	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	92	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	93	#endif
74		94
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	95	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	96	# undef CORO_STACKGUARD
77	#endif	97	#endif
78		98
79	#ifndef STACKGUARD	99	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	100	# define CORO_STACKGUARD 0
81	#endif	101	#endif
82		102
83	/* prefer perl internal functions over our own? */	103	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	104	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	105	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	106	#endif
87		107
88	/* The next macro should declare a variable stacklevel that contains and approximation	108	/* The next macros try to return the current stack pointer, in an as
89	* to the current C stack pointer. Its property is that it changes with each call	109	* portable way as possible. */
90	* and should be unique. */
91	#define dSTACKLEVEL int stacklevel	110	#define dSTACKLEVEL volatile char stacklevel
92	#define STACKLEVEL ((void *)&stacklevel)	111	#define STACKLEVEL ((void *)&stacklevel)
93		112
94	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
95		114
96	#if __GNUC__ >= 3	115	#if __GNUC__ >= 3
97	# define attribute(x) __attribute__(x)	116	# define attribute(x) __attribute__(x)
98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
99	#else	119	#else
100	# define attribute(x)	120	# define attribute(x)
101	# define BARRIER	121	# define BARRIER
		122	# define expect(expr,value) (expr)
102	#endif	123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
103		127
104	#define NOINLINE attribute ((noinline))	128	#define NOINLINE attribute ((noinline))
105		129
106	#include "CoroAPI.h"	130	#include "CoroAPI.h"
107		131
…		…
121	I32 laststype;	145	I32 laststype;
122	int laststatval;	146	int laststatval;
123	Stat_t statcache;	147	Stat_t statcache;
124	};	148	};
125		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
126	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
127	static AV main_mainstack; / used to differentiate between $main and others */	152	static AV main_mainstack; / used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
128	static HV coro_state_stash, coro_stash;	154	static HV coro_state_stash, coro_stash;
129	static SV coro_mortal; / will be freed after next transfer */	155	static volatile SV coro_mortal; / will be freed after next transfer */
		156
		157	static GV irsgv; / $/ */
		158	static GV stdoutgv; / STDOUT /
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV hv_sig; / %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
130		167
131	static struct coro_cctx *cctx_first;	168	static struct coro_cctx *cctx_first;
132	static int cctx_count, cctx_idle;	169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		178	};
133		179
134	/* this is a structure representing a c-level coroutine */	180	/* this is a structure representing a c-level coroutine */
135	typedef struct coro_cctx {	181	typedef struct coro_cctx {
136	struct coro_cctx *next;	182	struct coro_cctx *next;
137		183
138	/* the stack */	184	/* the stack */
139	void *sptr;	185	void *sptr;
140	long ssize; /* positive == mmap, otherwise malloc */	186	size_t ssize;
141		187
142	/* cpu state */	188	/* cpu state */
143	void idle_sp; / sp of top-level transfer/schedule/cede call */	189	void idle_sp; / sp of top-level transfer/schedule/cede call */
144	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */	190	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
145	JMPENV *top_env;	191	JMPENV *top_env;
146	coro_context cctx;	192	coro_context cctx;
147		193
148	int inuse;
149
150	#if USE_VALGRIND	194	#if CORO_USE_VALGRIND
151	int valgrind_id;	195	int valgrind_id;
152	#endif	196	#endif
		197	unsigned char flags;
153	} coro_cctx;	198	} coro_cctx;
154		199
155	enum {	200	enum {
156	CF_RUNNING = 0x0001, /* coroutine is running */	201	CF_RUNNING = 0x0001, /* coroutine is running */
157	CF_READY = 0x0002, /* coroutine is ready */	202	CF_READY = 0x0002, /* coroutine is ready */
158	CF_NEW = 0x0004, /* has never been switched to */	203	CF_NEW = 0x0004, /* has never been switched to */
159	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160	};	205	};
161		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		208	typedef struct {
		209	SV *defsv;
		210	AV *defav;
		211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
		217
		218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		219
162	/* this is a structure representing a perl-level coroutine */	220	/* this is a structure representing a perl-level coroutine */
163	struct coro {	221	struct coro {
164	/* the c coroutine allocated to this perl coroutine, if any */	222	/* the c coroutine allocated to this perl coroutine, if any */
165	coro_cctx *cctx;	223	coro_cctx *cctx;
166		224
		225	/* process data */
		226	AV *mainstack;
		227	perl_slots slot; / basically the saved sp */
		228
167	/* data associated with this coroutine (initial args) */	229	AV args; / data associated with this coroutine (initial args) */
168	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
169	int refcnt;
170	int save; /* CORO_SAVE flags */
171	int flags; /* CF_ flags */	231	int flags; /* CF_ flags */
		232	HV hv; / the perl hash associated with this coro, if any */
172		233
173	/* optionally saved, might be zero */	234	/* statistics */
174	AV defav; / @_ */	235	int usecount; /* number of transfers to this coro */
175	SV defsv; / $_ */
176	SV errsv; / $@ */
177	SV irssv; / $/ */
178	SV irssv_sv; / real $/ cache */
179
180	#define VAR(name,type) type name;
181	# include "state.h"
182	#undef VAR
183		236
184	/* coro process data */	237	/* coro process data */
185	int prio;	238	int prio;
		239	SV throw; / exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
		243
		244	/* linked list */
		245	struct coro next, prev;
186	};	246	};
187		247
188	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
189	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
190		250
…		…
199		259
200	/* for Coro.pm */	260	/* for Coro.pm */
201	static SV *coro_current;	261	static SV *coro_current;
202	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
203	static int coro_nready;	263	static int coro_nready;
		264	static struct coro *coro_first;
204		265
205	/ lowlevel stuff ********************************************************/	266	/ lowlevel stuff ********************************************************/
206		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,9,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
207	static AV *	278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,9,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,9,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
		298	static AV *
208	coro_clone_padlist (CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
209	{	300	{
210	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
211	AV newpadlist, newpad;	302	AV newpadlist, newpad;
212		303
213	newpadlist = newAV ();	304	newpadlist = newAV ();
…		…
225		316
226	return newpadlist;	317	return newpadlist;
227	}	318	}
228		319
229	static void	320	static void
230	free_padlist (AV *padlist)	321	free_padlist (pTHX_ AV *padlist)
231	{	322	{
232	/* may be during global destruction */	323	/* may be during global destruction */
233	if (SvREFCNT (padlist))	324	if (SvREFCNT (padlist))
234	{	325	{
235	I32 i = AvFILLp (padlist);	326	I32 i = AvFILLp (padlist);
…		…
256	AV *padlist;	347	AV *padlist;
257	AV av = (AV )mg->mg_obj;	348	AV av = (AV )mg->mg_obj;
258		349
259	/* casting is fun. */	350	/* casting is fun. */
260	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	351	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
261	free_padlist (padlist);	352	free_padlist (aTHX_ padlist);
262
263	SvREFCNT_dec (av);
264		353
265	return 0;	354	return 0;
266	}	355	}
267		356
268	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
269		359
270	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
271		364
272	#define CORO_MAGIC(cv) \	365	#define CORO_MAGIC(sv,type) \
273	SvMAGIC (cv) \	366	SvMAGIC (sv) \
274	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	367	? SvMAGIC (sv)->mg_type == type \
275	? SvMAGIC (cv) \	368	? SvMAGIC (sv) \
276	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	369	: mg_find (sv, type) \
277	: 0	370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
278		400
279	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
280	static void	402	static void
281	get_padlist (CV *cv)	403	get_padlist (pTHX_ CV *cv)
282	{	404	{
283	MAGIC *mg = CORO_MAGIC (cv);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
284	AV *av;	406	AV *av;
285		407
286	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
287	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288	else	410	else
289	{	411	{
290	#if PREFER_PERL_FUNCTIONS	412	#if CORO_PREFER_PERL_FUNCTIONS
291	/* this is probably cleaner, but also slower? */	413	/* this is probably cleaner, but also slower? */
292	CV *cp = Perl_cv_clone (cv);	414	CV *cp = Perl_cv_clone (cv);
293	CvPADLIST (cv) = CvPADLIST (cp);	415	CvPADLIST (cv) = CvPADLIST (cp);
294	CvPADLIST (cp) = 0;	416	CvPADLIST (cp) = 0;
295	SvREFCNT_dec (cp);	417	SvREFCNT_dec (cp);
296	#else	418	#else
297	CvPADLIST (cv) = coro_clone_padlist (cv);	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
298	#endif	420	#endif
299	}	421	}
300	}	422	}
301		423
302	static void	424	static void
303	put_padlist (CV *cv)	425	put_padlist (pTHX_ CV *cv)
304	{	426	{
305	MAGIC *mg = CORO_MAGIC (cv);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
306	AV *av;	428	AV *av;
307		429
308	if (!mg)	430	if (expect_false (!mg))
309	{	431	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
310	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
311	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
312	mg->mg_virtual = &vtbl_coro;
313	mg->mg_obj = (SV *)newAV ();
314	}
315		432
316	av = (AV *)mg->mg_obj;	433	av = (AV *)mg->mg_obj;
317		434
318	if (AvFILLp (av) >= AvMAX (av))	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
319	av_extend (av, AvMAX (av) + 1);	436	av_extend (av, AvMAX (av) + 1);
320		437
321	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
322	}	439	}
323		440
324	/ load & save, init *****************************************************/	441	/ load & save, init *****************************************************/
325		442
326	#define SB do {
327	#define SE } while (0)
328
329	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
330
331	static void	443	static void
332	load_perl (Coro__State c)	444	load_perl (pTHX_ Coro__State c)
333	{	445	{
		446	perl_slots *slot = c->slot;
		447	c->slot = 0;
		448
		449	PL_mainstack = c->mainstack;
		450
		451	GvSV (PL_defgv) = slot->defsv;
		452	GvAV (PL_defgv) = slot->defav;
		453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
334	#define VAR(name,type) PL_ ## name = c->name;	456	#define VAR(name,type) PL_ ## name = slot->name;
335	# include "state.h"	457	# include "state.h"
336	#undef VAR	458	#undef VAR
337
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341	if (c->irssv)
342	{
343	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
344	SvREFCNT_dec (c->irssv);
345	else
346	{
347	REPLACE_SV (PL_rs, c->irssv);
348	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349	sv_setsv (c->irssv_sv, PL_rs);
350	}
351	}
352		459
353	{	460	{
354	dSP;	461	dSP;
		462
355	CV *cv;	463	CV *cv;
356		464
357	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
358	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
359	{	467	{
360	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
361	CvDEPTH (cv) = PTR2IV (POPs);	469	CvDEPTH (cv) = PTR2IV (POPs);
362	CvPADLIST (cv) = (AV *)POPs;	470	CvPADLIST (cv) = (AV *)POPs;
363	}	471	}
364		472
365	PUTBACK;	473	PUTBACK;
366	}	474	}
367	}	475	}
368		476
369	static void	477	static void
370	save_perl (Coro__State c)	478	save_perl (pTHX_ Coro__State c)
371	{	479	{
372	{	480	{
373	dSP;	481	dSP;
374	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
375	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
378	/*	486	/*
379	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
380	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
381	*/	489	*/
382		490
383	EXTEND (SP, 3 + 1);
384	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
385	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
386	for (;;)	493	for (;;)
387	{	494	{
388	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
389	{	496	{
390	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
391		498
392	if (CxTYPE (cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
393	{	500	{
394	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
395		502
396	if (CvDEPTH (cv))	503	if (expect_true (CvDEPTH (cv)))
397	{	504	{
398	EXTEND (SP, 3);	505	EXTEND (SP, 3);
399	PUSHs ((SV *)CvPADLIST (cv));	506	PUSHs ((SV *)CvPADLIST (cv));
400	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
401	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
402		509
403	CvDEPTH (cv) = 0;	510	CvDEPTH (cv) = 0;
404	get_padlist (cv);	511	get_padlist (aTHX_ cv);
405	}	512	}
406	}	513	}
407	}	514	}
408		515
409	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
410	break;	517	break;
411		518
412	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
413	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
414	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
415	}	522	}
416		523
417	PUTBACK;	524	PUTBACK;
418	}	525	}
419		526
420	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
421	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
422	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
423	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
424		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		543
		544	slot->defav = GvAV (PL_defgv);
		545	slot->defsv = DEFSV;
		546	slot->errsv = ERRSV;
		547	slot->irsgv = GvSV (irsgv);
		548
425	#define VAR(name,type)c->name = PL_ ## name;	549	#define VAR(name,type) slot->name = PL_ ## name;
426	# include "state.h"	550	# include "state.h"
427	#undef VAR	551	#undef VAR
		552	}
428	}	553	}
429		554
430	/*	555	/*
431	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
432	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
433	* on the (sometimes correct) assumption that coroutines do	558	* on the (sometimes correct) assumption that coroutines do
434	* not usually need a lot of stackspace.	559	* not usually need a lot of stackspace.
435	*/	560	*/
436	#if PREFER_PERL_FUNCTIONS	561	#if CORO_PREFER_PERL_FUNCTIONS
437	# define coro_init_stacks init_stacks	562	# define coro_init_stacks init_stacks
438	#else	563	#else
439	static void	564	static void
440	coro_init_stacks ()	565	coro_init_stacks (pTHX)
441	{	566	{
442	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	567	PL_curstackinfo = new_stackinfo(32, 8);
443	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
444	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
445	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
446		571
447	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
448	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
449	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
450		575
451	New(50,PL_tmps_stack,128,SV*);	576	New(50,PL_tmps_stack,32,SV*);
452	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
453	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
454	PL_tmps_max = 128;	579	PL_tmps_max = 32;
455		580
456	New(54,PL_markstack,32,I32);	581	New(54,PL_markstack,16,I32);
457	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
458	PL_markstack_max = PL_markstack + 32;	583	PL_markstack_max = PL_markstack + 16;
459		584
460	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
461	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
462	#endif	587	#endif
463		588
464	New(54,PL_scopestack,32,I32);	589	New(54,PL_scopestack,8,I32);
465	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
466	PL_scopestack_max = 32;	591	PL_scopestack_max = 8;
467		592
468	New(54,PL_savestack,64,ANY);	593	New(54,PL_savestack,24,ANY);
469	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
470	PL_savestack_max = 64;	595	PL_savestack_max = 24;
471		596
472	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,9,0)
473	New(54,PL_retstack,16,OP*);	598	New(54,PL_retstack,4,OP*);
474	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
475	PL_retstack_max = 16;	600	PL_retstack_max = 4;
476	#endif	601	#endif
477	}	602	}
478	#endif	603	#endif
479		604
480	/*	605	/*
481	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
482	*/	607	*/
483	static void	608	static void
484	coro_destroy_stacks ()	609	coro_destroy_stacks (pTHX)
485	{	610	{
486	if (!IN_DESTRUCT)
487	{
488	/* restore all saved variables and stuff */
489	LEAVE_SCOPE (0);
490	assert (PL_tmps_floor == -1);
491
492	/* free all temporaries */
493	FREETMPS;
494	assert (PL_tmps_ix == -1);
495
496	/* unwind all extra stacks */
497	POPSTACK_TO (PL_mainstack);
498
499	/* unwind main stack */
500	dounwind (-1);
501	}
502
503	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
505		613
506	while (PL_curstackinfo)	614	while (PL_curstackinfo)
507	{	615	{
…		…
522	#if !PERL_VERSION_ATLEAST (5,9,0)	630	#if !PERL_VERSION_ATLEAST (5,9,0)
523	Safefree (PL_retstack);	631	Safefree (PL_retstack);
524	#endif	632	#endif
525	}	633	}
526		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
527	/ coroutine stack handling **********************************************/	672	/ coroutine stack handling **********************************************/
528		673
		674	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
		675	static int (orig_sigelem_set) (pTHX_ SV sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV old = svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
		723
529	static void	724	static void
530	setup_coro (struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
531	{	726	{
532	/*	727	/*
533	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
534	*/	729	*/
535
536	coro_init_stacks ();	730	coro_init_stacks (aTHX);
537		731
		732	PL_runops = RUNOPS_DEFAULT;
538	PL_curcop = &PL_compiling;	733	PL_curcop = &PL_compiling;
539	PL_in_eval = EVAL_NULL;	734	PL_in_eval = EVAL_NULL;
		735	PL_comppad = 0;
540	PL_curpm = 0;	736	PL_curpm = 0;
		737	PL_curpad = 0;
541	PL_localizing = 0;	738	PL_localizing = 0;
542	PL_dirty = 0;	739	PL_dirty = 0;
543	PL_restartop = 0;	740	PL_restartop = 0;
544		741
		742	/* recreate the die/warn hooks */
		743	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		744	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		745
		746	GvSV (PL_defgv) = newSV (0);
		747	GvAV (PL_defgv) = coro->args; coro->args = 0;
		748	GvSV (PL_errgv) = newSV (0);
		749	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		750	PL_rs = newSVsv (GvSV (irsgv));
		751	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		752
545	{	753	{
546	dSP;	754	dSP;
547	LOGOP myop;	755	LOGOP myop;
548		756
549	SvREFCNT_dec (GvAV (PL_defgv));
550	GvAV (PL_defgv) = coro->args; coro->args = 0;
551
552	Zero (&myop, 1, LOGOP);	757	Zero (&myop, 1, LOGOP);
553	myop.op_next = Nullop;	758	myop.op_next = Nullop;
554	myop.op_flags = OPf_WANT_VOID;	759	myop.op_flags = OPf_WANT_VOID;
555		760
556	PUSHMARK (SP);	761	PUSHMARK (SP);
557	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	762	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
558	PUTBACK;	763	PUTBACK;
559	PL_op = (OP *)&myop;	764	PL_op = (OP *)&myop;
560	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	765	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561	SPAGAIN;	766	SPAGAIN;
562	}	767	}
563		768
564	ENTER; /* necessary e.g. for dounwind */	769	/* this newly created coroutine might be run on an existing cctx which most
		770	* likely was suspended in set_stacklevel, called from entersub.
		771	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		772	* so we ENTER here for symmetry
		773	*/
		774	ENTER;
565	}	775	}
566		776
567	static void	777	static void
		778	coro_destroy (pTHX_ struct coro *coro)
		779	{
		780	if (!IN_DESTRUCT)
		781	{
		782	/* restore all saved variables and stuff */
		783	LEAVE_SCOPE (0);
		784	assert (PL_tmps_floor == -1);
		785
		786	/* free all temporaries */
		787	FREETMPS;
		788	assert (PL_tmps_ix == -1);
		789
		790	/* unwind all extra stacks */
		791	POPSTACK_TO (PL_mainstack);
		792
		793	/* unwind main stack */
		794	dounwind (-1);
		795	}
		796
		797	SvREFCNT_dec (GvSV (PL_defgv));
		798	SvREFCNT_dec (GvAV (PL_defgv));
		799	SvREFCNT_dec (GvSV (PL_errgv));
		800	SvREFCNT_dec (PL_defoutgv);
		801	SvREFCNT_dec (PL_rs);
		802	SvREFCNT_dec (GvSV (irsgv));
		803
		804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
		809
		810	coro_destroy_stacks (aTHX);
		811	}
		812
		813	static void
568	free_coro_mortal ()	814	free_coro_mortal (pTHX)
569	{	815	{
570	if (coro_mortal)	816	if (expect_true (coro_mortal))
571	{	817	{
572	SvREFCNT_dec (coro_mortal);	818	SvREFCNT_dec (coro_mortal);
573	coro_mortal = 0;	819	coro_mortal = 0;
574	}	820	}
575	}	821	}
576		822
		823	static int
		824	runops_trace (pTHX)
		825	{
		826	COP *oldcop = 0;
		827	int oldcxix = -2;
		828	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		829	coro_cctx *cctx = coro->cctx;
		830
		831	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		832	{
		833	PERL_ASYNC_CHECK ();
		834
		835	if (cctx->flags & CC_TRACE_ALL)
		836	{
		837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		838	{
		839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		840	SV bot, top;
		841	AV av = newAV (); / return values */
		842	SV **cb;
		843	dSP;
		844
		845	GV *gv = CvGV (cx->blk_sub.cv);
		846	SV *fullname = sv_2mortal (newSV (0));
		847	if (isGV (gv))
		848	gv_efullname3 (fullname, gv, 0);
		849
		850	bot = PL_stack_base + cx->blk_oldsp + 1;
		851	top = cx->blk_gimme == G_ARRAY ? SP + 1
		852	: cx->blk_gimme == G_SCALAR ? bot + 1
		853	: bot;
		854
		855	av_extend (av, top - bot);
		856	while (bot < top)
		857	av_push (av, SvREFCNT_inc (*bot++));
		858
		859	PL_runops = RUNOPS_DEFAULT;
		860	ENTER;
		861	SAVETMPS;
		862	EXTEND (SP, 3);
		863	PUSHMARK (SP);
		864	PUSHs (&PL_sv_no);
		865	PUSHs (fullname);
		866	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		867	PUTBACK;
		868	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		869	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		870	SPAGAIN;
		871	FREETMPS;
		872	LEAVE;
		873	PL_runops = runops_trace;
		874	}
		875
		876	if (oldcop != PL_curcop)
		877	{
		878	oldcop = PL_curcop;
		879
		880	if (PL_curcop != &PL_compiling)
		881	{
		882	SV **cb;
		883
		884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		885	{
		886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		887
		888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		889	{
		890	runops_proc_t old_runops = PL_runops;
		891	dSP;
		892	GV *gv = CvGV (cx->blk_sub.cv);
		893	SV *fullname = sv_2mortal (newSV (0));
		894
		895	if (isGV (gv))
		896	gv_efullname3 (fullname, gv, 0);
		897
		898	PL_runops = RUNOPS_DEFAULT;
		899	ENTER;
		900	SAVETMPS;
		901	EXTEND (SP, 3);
		902	PUSHMARK (SP);
		903	PUSHs (&PL_sv_yes);
		904	PUSHs (fullname);
		905	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		906	PUTBACK;
		907	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		908	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		909	SPAGAIN;
		910	FREETMPS;
		911	LEAVE;
		912	PL_runops = runops_trace;
		913	}
		914
		915	oldcxix = cxstack_ix;
		916	}
		917
		918	if (cctx->flags & CC_TRACE_LINE)
		919	{
		920	dSP;
		921
		922	PL_runops = RUNOPS_DEFAULT;
		923	ENTER;
		924	SAVETMPS;
		925	EXTEND (SP, 3);
		926	PL_runops = RUNOPS_DEFAULT;
		927	PUSHMARK (SP);
		928	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		929	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		930	PUTBACK;
		931	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		932	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		933	SPAGAIN;
		934	FREETMPS;
		935	LEAVE;
		936	PL_runops = runops_trace;
		937	}
		938	}
		939	}
		940	}
		941	}
		942
		943	TAINT_NOT;
		944	return 0;
		945	}
		946
577	/* inject a fake call to Coro::State::_cctx_init into the execution */	947	/* inject a fake call to Coro::State::_cctx_init into the execution */
		948	/* _cctx_init should be careful, as it could be called at almost any time */
		949	/* during execution of a perl program */
578	static void NOINLINE	950	static void NOINLINE
579	prepare_cctx (coro_cctx *cctx)	951	cctx_prepare (pTHX_ coro_cctx *cctx)
580	{	952	{
581	dSP;	953	dSP;
582	LOGOP myop;	954	LOGOP myop;
		955
		956	PL_top_env = &PL_start_env;
		957
		958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
583		960
584	Zero (&myop, 1, LOGOP);	961	Zero (&myop, 1, LOGOP);
585	myop.op_next = PL_op;	962	myop.op_next = PL_op;
586	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	963	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
587		964
…		…
593	PL_op = (OP *)&myop;	970	PL_op = (OP *)&myop;
594	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	971	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
595	SPAGAIN;	972	SPAGAIN;
596	}	973	}
597		974
		975	/*
		976	* this is a _very_ stripped down perl interpreter ;)
		977	*/
598	static void	978	static void
599	coro_run (void *arg)	979	cctx_run (void *arg)
600	{	980	{
		981	dTHX;
		982
601	/* coro_run is the alternative tail of transfer(), so unlock here. */	983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
602	UNLOCK;	984	UNLOCK;
603		985
604	/*	986	/* we now skip the entersub that lead to transfer() */
605	* this is a _very_ stripped down perl interpreter ;)	987	PL_op = PL_op->op_next;
606	*/
607	PL_top_env = &PL_start_env;
608		988
609	/* inject call to cctx_init */	989	/* inject a fake subroutine call to cctx_init */
610	prepare_cctx ((coro_cctx *)arg);	990	cctx_prepare (aTHX_ (coro_cctx *)arg);
611		991
612	/* somebody will hit me for both perl_run and PL_restartop */	992	/* somebody or something will hit me for both perl_run and PL_restartop */
613	PL_restartop = PL_op;	993	PL_restartop = PL_op;
614	perl_run (PL_curinterp);	994	perl_run (PL_curinterp);
615		995
616	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	996	/*
617	abort ();	997	* If perl-run returns we assume exit() was being called or the coro
		998	* fell off the end, which seems to be the only valid (non-bug)
		999	* reason for perl_run to return. We try to exit by jumping to the
		1000	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1001	* coroutine as Coro has no such concept
		1002	*/
		1003	PL_top_env = main_top_env;
		1004	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
618	}	1005	}
619		1006
620	static coro_cctx *	1007	static coro_cctx *
621	cctx_new ()	1008	cctx_new ()
622	{	1009	{
623	coro_cctx *cctx;	1010	coro_cctx *cctx;
		1011	void *stack_start;
		1012	size_t stack_size;
624		1013
625	++cctx_count;	1014	++cctx_count;
626		1015
627	Newz (0, cctx, 1, coro_cctx);	1016	Newz (0, cctx, 1, coro_cctx);
628		1017
629	#if HAVE_MMAP	1018	#if HAVE_MMAP
630
631	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1019	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
632	/* mmap supposedly does allocate-on-write for us */	1020	/* mmap supposedly does allocate-on-write for us */
633	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1021	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
634		1022
635	if (cctx->sptr == (void *)-1)	1023	if (cctx->sptr != (void *)-1)
636	{
637	perror ("FATAL: unable to mmap stack for coroutine");
638	_exit (EXIT_FAILURE);
639	}	1024	{
640
641	# if STACKGUARD	1025	# if CORO_STACKGUARD
642	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1026	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
643	# endif	1027	# endif
		1028	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1029	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1030	cctx->flags \|= CC_MAPPED;
		1031	}
		1032	else
		1033	#endif
		1034	{
		1035	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1036	New (0, cctx->sptr, coro_stacksize, long);
644		1037
645	#else
646
647	cctx->ssize = STACKSIZE * (long)sizeof (long);
648	New (0, cctx->sptr, STACKSIZE, long);
649
650	if (!cctx->sptr)	1038	if (!cctx->sptr)
651	{	1039	{
652	perror ("FATAL: unable to malloc stack for coroutine");	1040	perror ("FATAL: unable to allocate stack for coroutine");
653	_exit (EXIT_FAILURE);	1041	_exit (EXIT_FAILURE);
654	}	1042	}
655		1043
656	#endif	1044	stack_start = cctx->sptr;
		1045	stack_size = cctx->ssize;
		1046	}
657		1047
658	#if USE_VALGRIND	1048	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
659	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	1049	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
660	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661	cctx->ssize + (char *)cctx->sptr
662	);
663	#endif
664
665	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
666		1050
667	return cctx;	1051	return cctx;
668	}	1052	}
669		1053
670	static void	1054	static void
…		…
673	if (!cctx)	1057	if (!cctx)
674	return;	1058	return;
675		1059
676	--cctx_count;	1060	--cctx_count;
677		1061
678	#if USE_VALGRIND	1062	#if CORO_USE_VALGRIND
679	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680	#endif	1064	#endif
681		1065
682	#if HAVE_MMAP	1066	#if HAVE_MMAP
		1067	if (cctx->flags & CC_MAPPED)
683	munmap (cctx->sptr, cctx->ssize);	1068	munmap (cctx->sptr, cctx->ssize);
684	#else	1069	else
		1070	#endif
685	Safefree (cctx->sptr);	1071	Safefree (cctx->sptr);
686	#endif
687		1072
688	Safefree (cctx);	1073	Safefree (cctx);
689	}	1074	}
690		1075
		1076	/* wether this cctx should be destructed */
		1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1078
691	static coro_cctx *	1079	static coro_cctx *
692	cctx_get ()	1080	cctx_get (pTHX)
693	{	1081	{
694	coro_cctx *cctx;	1082	while (expect_true (cctx_first))
695
696	if (cctx_first)
697	{	1083	{
698	cctx = cctx_first;	1084	coro_cctx *cctx = cctx_first;
699	cctx_first = cctx->next;	1085	cctx_first = cctx->next;
700	--cctx_idle;	1086	--cctx_idle;
701	}	1087
702	else	1088	if (expect_true (!CCTX_EXPIRED (cctx)))
703	{	1089	return cctx;
704	cctx = cctx_new ();	1090
705	PL_op = PL_op->op_next;	1091	cctx_destroy (cctx);
706	}	1092	}
707		1093
708	return cctx;	1094	return cctx_new ();
709	}	1095	}
710		1096
711	static void	1097	static void
712	cctx_put (coro_cctx *cctx)	1098	cctx_put (coro_cctx *cctx)
713	{	1099	{
714	/* free another cctx if overlimit */	1100	/* free another cctx if overlimit */
715	if (cctx_idle >= MAX_IDLE_CCTX)	1101	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
716	{	1102	{
717	coro_cctx *first = cctx_first;	1103	coro_cctx *first = cctx_first;
718	cctx_first = first->next;	1104	cctx_first = first->next;
719	--cctx_idle;	1105	--cctx_idle;
720		1106
721	assert (!first->inuse);
722	cctx_destroy (first);	1107	cctx_destroy (first);
723	}	1108	}
724		1109
725	++cctx_idle;	1110	++cctx_idle;
726	cctx->next = cctx_first;	1111	cctx->next = cctx_first;
727	cctx_first = cctx;	1112	cctx_first = cctx;
728	}	1113	}
729		1114
730	/ coroutine switching ***************************************************/	1115	/ coroutine switching ***************************************************/
731		1116
732	/* never call directly, always through the coro_state_transfer global variable */	1117	static void
		1118	transfer_check (pTHX_ struct coro prev, struct coro next)
		1119	{
		1120	if (expect_true (prev != next))
		1121	{
		1122	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1123	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1124
		1125	if (expect_false (next->flags & CF_RUNNING))
		1126	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1127
		1128	if (expect_false (next->flags & CF_DESTROYED))
		1129	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (
		1132	#if PERL_VERSION_ATLEAST (5,9,0)
		1133	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
		1134	#else
		1135	expect_false (PL_lex_state != LEX_NOTPARSING)
		1136	#endif
		1137	)
		1138	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1139	}
		1140	}
		1141
		1142	/* always use the TRANSFER macro */
733	static void NOINLINE	1143	static void NOINLINE
734	transfer (struct coro prev, struct coro next)	1144	transfer (pTHX_ struct coro prev, struct coro next)
735	{	1145	{
736	dSTACKLEVEL;	1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
737		1148
738	/* sometimes transfer is only called to set idle_sp */	1149	/* sometimes transfer is only called to set idle_sp */
739	if (!next)	1150	if (expect_false (!next))
740	{	1151	{
741	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
742	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */	1153	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
743	}	1154	}
744	else if (prev != next)	1155	else if (expect_true (prev != next))
745	{	1156	{
746	coro_cctx *prev__cctx;	1157	coro_cctx *prev__cctx;
747		1158
748	if (prev->flags & CF_NEW)	1159	if (expect_false (prev->flags & CF_NEW))
749	{	1160	{
750	/* create a new empty context */	1161	/* create a new empty context */
751	Newz (0, prev->cctx, 1, coro_cctx);	1162	Newz (0, prev->cctx, 1, coro_cctx);
752	prev->cctx->inuse = 1;
753	prev->flags &= ~CF_NEW;	1163	prev->flags &= ~CF_NEW;
754	prev->flags \|= CF_RUNNING;	1164	prev->flags \|= CF_RUNNING;
755	}	1165	}
756		1166
757	/TODO: must not croak here /
758	if (!prev->flags & CF_RUNNING)
759	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761	if (next->flags & CF_RUNNING)
762	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764	if (next->flags & CF_DESTROYED)
765	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767	prev->flags &= ~CF_RUNNING;	1167	prev->flags &= ~CF_RUNNING;
768	next->flags \|= CF_RUNNING;	1168	next->flags \|= CF_RUNNING;
769		1169
770	LOCK;	1170	LOCK;
771		1171
		1172	/* first get rid of the old state */
		1173	save_perl (aTHX_ prev);
		1174
772	if (next->flags & CF_NEW)	1175	if (expect_false (next->flags & CF_NEW))
773	{	1176	{
774	/* need to start coroutine */	1177	/* need to start coroutine */
775	next->flags &= ~CF_NEW;	1178	next->flags &= ~CF_NEW;
776	/* first get rid of the old state */
777	save_perl (prev);
778	/* setup coroutine call */	1179	/* setup coroutine call */
779	setup_coro (next);	1180	coro_setup (aTHX_ next);
780	/* need a new stack */
781	assert (!next->cctx);
782	}	1181	}
783	else	1182	else
784	{
785	/* coroutine already started */
786	save_perl (prev);
787	load_perl (next);	1183	load_perl (aTHX_ next);
788	}
789		1184
790	prev__cctx = prev->cctx;	1185	prev__cctx = prev->cctx;
791		1186
792	/* possibly "free" the cctx */	1187	/* possibly "free" the cctx */
793	if (prev__cctx->idle_sp == STACKLEVEL)	1188	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
794	{	1189	{
795	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1190	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
796	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1191	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
797		1192
798	prev->cctx = 0;	1193	prev->cctx = 0;
799		1194
		1195	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1196	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1197	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1198	if (!next->cctx)
		1199	next->cctx = cctx_get (aTHX);
		1200
800	cctx_put (prev__cctx);	1201	cctx_put (prev__cctx);
801	prev__cctx->inuse = 0;
802	}	1202	}
803		1203
		1204	++next->usecount;
		1205
804	if (!next->cctx)	1206	if (expect_true (!next->cctx))
805	{
806	next->cctx = cctx_get ();	1207	next->cctx = cctx_get (aTHX);
807	assert (!next->cctx->inuse);
808	next->cctx->inuse = 1;
809	}
810		1208
		1209	has_throw = !!next->throw;
		1210
811	if (prev__cctx != next->cctx)	1211	if (expect_false (prev__cctx != next->cctx))
812	{	1212	{
813	prev__cctx->top_env = PL_top_env;	1213	prev__cctx->top_env = PL_top_env;
814	PL_top_env = next->cctx->top_env;	1214	PL_top_env = next->cctx->top_env;
815	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1215	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816	}	1216	}
817		1217
818	free_coro_mortal ();	1218	free_coro_mortal (aTHX);
819	UNLOCK;	1219	UNLOCK;
		1220
		1221	if (expect_false (has_throw))
		1222	{
		1223	struct coro *coro = SvSTATE (coro_current);
		1224
		1225	if (coro->throw)
		1226	{
		1227	SV *exception = coro->throw;
		1228	coro->throw = 0;
		1229	sv_setsv (ERRSV, exception);
		1230	croak (0);
		1231	}
		1232	}
820	}	1233	}
821	}	1234	}
822		1235
823	struct transfer_args	1236	struct transfer_args
824	{	1237	{
825	struct coro prev, next;	1238	struct coro prev, next;
826	};	1239	};
827		1240
828	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1241	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1242	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
829		1243
830	/ high level stuff ******************************************************/	1244	/ high level stuff ******************************************************/
831		1245
832	static int	1246	static int
833	coro_state_destroy (struct coro *coro)	1247	coro_state_destroy (pTHX_ struct coro *coro)
834	{	1248	{
835	if (coro->flags & CF_DESTROYED)	1249	if (coro->flags & CF_DESTROYED)
836	return 0;	1250	return 0;
837		1251
838	coro->flags \|= CF_DESTROYED;	1252	coro->flags \|= CF_DESTROYED;
839		1253
840	if (coro->flags & CF_READY)	1254	if (coro->flags & CF_READY)
841	{	1255	{
842	/* reduce nready, as destroying a ready coro effectively unreadies it */	1256	/* reduce nready, as destroying a ready coro effectively unreadies it */
843	/* alternative: look through all ready queues and remove it */	1257	/* alternative: look through all ready queues and remove the coro */
844	LOCK;	1258	LOCK;
845	--coro_nready;	1259	--coro_nready;
846	UNLOCK;	1260	UNLOCK;
847	}	1261	}
848	else	1262	else
849	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */	1263	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
850		1264
851	if (coro->mainstack && coro->mainstack != main_mainstack)	1265	if (coro->mainstack && coro->mainstack != main_mainstack)
852	{	1266	{
853	assert (!(coro->flags & CF_RUNNING));
854
855	struct coro temp;	1267	struct coro temp;
856	Zero (&temp, 1, struct coro);
857	temp.save = CORO_SAVE_ALL;
858		1268
859	if (coro->flags & CF_RUNNING)	1269	if (coro->flags & CF_RUNNING)
860	croak ("FATAL: tried to destroy currently running coroutine");	1270	croak ("FATAL: tried to destroy currently running coroutine");
861		1271
862	save_perl (&temp);	1272	save_perl (aTHX_ &temp);
863	load_perl (coro);	1273	load_perl (aTHX_ coro);
864		1274
865	coro_destroy_stacks ();	1275	coro_destroy (aTHX_ coro);
866		1276
867	load_perl (&temp); /* this will get rid of defsv etc.. */	1277	load_perl (aTHX_ &temp);
868		1278
869	coro->mainstack = 0;	1279	coro->slot = 0;
870	}	1280	}
871		1281
872	cctx_destroy (coro->cctx);	1282	cctx_destroy (coro->cctx);
873	SvREFCNT_dec (coro->args);	1283	SvREFCNT_dec (coro->args);
874		1284
		1285	if (coro->next) coro->next->prev = coro->prev;
		1286	if (coro->prev) coro->prev->next = coro->next;
		1287	if (coro == coro_first) coro_first = coro->next;
		1288
875	return 1;	1289	return 1;
876	}	1290	}
877		1291
878	static int	1292	static int
879	coro_state_free (pTHX_ SV sv, MAGIC mg)	1293	coro_state_free (pTHX_ SV sv, MAGIC mg)
880	{	1294	{
881	struct coro coro = (struct coro )mg->mg_ptr;	1295	struct coro coro = (struct coro )mg->mg_ptr;
882	mg->mg_ptr = 0;	1296	mg->mg_ptr = 0;
883		1297
		1298	coro->hv = 0;
		1299
884	if (--coro->refcnt < 0)	1300	if (--coro->refcnt < 0)
885	{	1301	{
886	coro_state_destroy (coro);	1302	coro_state_destroy (aTHX_ coro);
887	Safefree (coro);	1303	Safefree (coro);
888	}	1304	}
889		1305
890	return 0;	1306	return 0;
891	}	1307	}
…		…
909	#else	1325	#else
910	# define MGf_DUP 0	1326	# define MGf_DUP 0
911	#endif	1327	#endif
912	};	1328	};
913		1329
914	static struct coro *
915	SvSTATE (SV *coro)
916	{
917	HV *stash;
918	MAGIC *mg;
919
920	if (SvROK (coro))
921	coro = SvRV (coro);
922
923	stash = SvSTASH (coro);
924	if (stash != coro_stash && stash != coro_state_stash)
925	{
926	/* very slow, but rare, check */
927	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
928	croak ("Coro::State object required");
929	}
930
931	mg = SvMAGIC (coro);
932	assert (mg->mg_type == PERL_MAGIC_ext);
933	return (struct coro *)mg->mg_ptr;
934	}
935
936	static void	1330	static void
937	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)	1331	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
938	{	1332	{
939	ta->prev = SvSTATE (prev_sv);	1333	ta->prev = SvSTATE (prev_sv);
940	ta->next = SvSTATE (next_sv);	1334	ta->next = SvSTATE (next_sv);
		1335	TRANSFER_CHECK (*ta);
941	}	1336	}
942		1337
943	static void	1338	static void
944	api_transfer (SV prev_sv, SV next_sv)	1339	api_transfer (SV prev_sv, SV next_sv)
945	{	1340	{
		1341	dTHX;
946	struct transfer_args ta;	1342	struct transfer_args ta;
947		1343
948	prepare_transfer (&ta, prev_sv, next_sv);	1344	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
949	TRANSFER (ta);	1345	TRANSFER (ta);
950	}	1346	}
951		1347
952	static int
953	api_save (SV *coro_sv, int new_save)
954	{
955	struct coro *coro = SvSTATE (coro_sv);
956	int old_save = coro->save;
957
958	if (new_save >= 0)
959	coro->save = new_save;
960
961	return old_save;
962	}
963
964	/ Coro ******************************************************************/	1348	/ Coro ******************************************************************/
965		1349
966	static void	1350	static void
967	coro_enq (SV *coro_sv)	1351	coro_enq (pTHX_ SV *coro_sv)
968	{	1352	{
969	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1353	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
970	}	1354	}
971		1355
972	static SV *	1356	static SV *
973	coro_deq (int min_prio)	1357	coro_deq (pTHX)
974	{	1358	{
975	int prio = PRIO_MAX - PRIO_MIN;	1359	int prio;
976		1360
977	min_prio -= PRIO_MIN;
978	if (min_prio < 0)
979	min_prio = 0;
980
981	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1361	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
982	if (AvFILLp (coro_ready [prio]) >= 0)	1362	if (AvFILLp (coro_ready [prio]) >= 0)
983	return av_shift (coro_ready [prio]);	1363	return av_shift (coro_ready [prio]);
984		1364
985	return 0;	1365	return 0;
986	}	1366	}
987		1367
988	static int	1368	static int
989	api_ready (SV *coro_sv)	1369	api_ready (SV *coro_sv)
990	{	1370	{
		1371	dTHX;
991	struct coro *coro;	1372	struct coro *coro;
992		1373
993	if (SvROK (coro_sv))	1374	if (SvROK (coro_sv))
994	coro_sv = SvRV (coro_sv);	1375	coro_sv = SvRV (coro_sv);
995		1376
…		…
999	return 0;	1380	return 0;
1000		1381
1001	coro->flags \|= CF_READY;	1382	coro->flags \|= CF_READY;
1002		1383
1003	LOCK;	1384	LOCK;
1004	coro_enq (SvREFCNT_inc (coro_sv));	1385	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1005	++coro_nready;	1386	++coro_nready;
1006	UNLOCK;	1387	UNLOCK;
1007		1388
1008	return 1;	1389	return 1;
1009	}	1390	}
1010		1391
1011	static int	1392	static int
1012	api_is_ready (SV *coro_sv)	1393	api_is_ready (SV *coro_sv)
1013	{	1394	{
		1395	dTHX;
1014	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1396	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1015	}	1397	}
1016		1398
1017	static void	1399	static void
1018	prepare_schedule (struct transfer_args *ta)	1400	prepare_schedule (pTHX_ struct transfer_args *ta)
1019	{	1401	{
1020	SV prev_sv, next_sv;	1402	SV prev_sv, next_sv;
1021		1403
1022	for (;;)	1404	for (;;)
1023	{	1405	{
1024	LOCK;	1406	LOCK;
1025	next_sv = coro_deq (PRIO_MIN);	1407	next_sv = coro_deq (aTHX);
1026		1408
1027	/* nothing to schedule: call the idle handler */	1409	/* nothing to schedule: call the idle handler */
1028	if (!next_sv)	1410	if (expect_false (!next_sv))
1029	{	1411	{
		1412	dSP;
1030	UNLOCK;	1413	UNLOCK;
1031	dSP;
1032		1414
1033	ENTER;	1415	ENTER;
1034	SAVETMPS;	1416	SAVETMPS;
1035		1417
1036	PUSHMARK (SP);	1418	PUSHMARK (SP);
1037	PUTBACK;	1419	PUTBACK;
1038	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1420	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1421	SPAGAIN;
1039		1422
1040	FREETMPS;	1423	FREETMPS;
1041	LEAVE;	1424	LEAVE;
1042	continue;	1425	continue;
1043	}	1426	}
1044		1427
1045	ta->next = SvSTATE (next_sv);	1428	ta->next = SvSTATE (next_sv);
1046		1429
1047	/* cannot transfer to destroyed coros, skip and look for next */	1430	/* cannot transfer to destroyed coros, skip and look for next */
1048	if (ta->next->flags & CF_DESTROYED)	1431	if (expect_false (ta->next->flags & CF_DESTROYED))
1049	{	1432	{
1050	UNLOCK;	1433	UNLOCK;
1051	SvREFCNT_dec (next_sv);	1434	SvREFCNT_dec (next_sv);
1052	/* coro_nready is already taken care of by destroy */	1435	/* coro_nready is already taken care of by destroy */
1053	continue;	1436	continue;
…		…
1058	break;	1441	break;
1059	}	1442	}
1060		1443
1061	/* free this only after the transfer */	1444	/* free this only after the transfer */
1062	prev_sv = SvRV (coro_current);	1445	prev_sv = SvRV (coro_current);
1063	SvRV_set (coro_current, next_sv);
1064	ta->prev = SvSTATE (prev_sv);	1446	ta->prev = SvSTATE (prev_sv);
1065		1447	TRANSFER_CHECK (*ta);
1066	assert (ta->next->flags & CF_READY);	1448	assert (ta->next->flags & CF_READY);
1067	ta->next->flags &= ~CF_READY;	1449	ta->next->flags &= ~CF_READY;
		1450	SvRV_set (coro_current, next_sv);
1068		1451
1069	LOCK;	1452	LOCK;
1070	free_coro_mortal ();	1453	free_coro_mortal (aTHX);
1071	coro_mortal = prev_sv;	1454	coro_mortal = prev_sv;
1072	UNLOCK;	1455	UNLOCK;
1073	}	1456	}
1074		1457
1075	static void	1458	static void
1076	prepare_cede (struct transfer_args *ta)	1459	prepare_cede (pTHX_ struct transfer_args *ta)
1077	{	1460	{
1078	api_ready (coro_current);	1461	api_ready (coro_current);
1079	prepare_schedule (ta);	1462	prepare_schedule (aTHX_ ta);
1080	}	1463	}
1081		1464
1082	static int	1465	static int
1083	prepare_cede_notself (struct transfer_args *ta)	1466	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1084	{	1467	{
1085	if (coro_nready)	1468	if (coro_nready)
1086	{	1469	{
1087	SV *prev = SvRV (coro_current);	1470	SV *prev = SvRV (coro_current);
1088	prepare_schedule (ta);	1471	prepare_schedule (aTHX_ ta);
1089	api_ready (prev);	1472	api_ready (prev);
1090	return 1;	1473	return 1;
1091	}	1474	}
1092	else	1475	else
1093	return 0;	1476	return 0;
1094	}	1477	}
1095		1478
1096	static void	1479	static void
1097	api_schedule (void)	1480	api_schedule (void)
1098	{	1481	{
		1482	dTHX;
1099	struct transfer_args ta;	1483	struct transfer_args ta;
1100		1484
1101	prepare_schedule (&ta);	1485	prepare_schedule (aTHX_ &ta);
1102	TRANSFER (ta);	1486	TRANSFER (ta);
1103	}	1487	}
1104		1488
1105	static int	1489	static int
1106	api_cede (void)	1490	api_cede (void)
1107	{	1491	{
		1492	dTHX;
1108	struct transfer_args ta;	1493	struct transfer_args ta;
1109		1494
1110	prepare_cede (&ta);	1495	prepare_cede (aTHX_ &ta);
1111		1496
1112	if (ta.prev != ta.next)	1497	if (expect_true (ta.prev != ta.next))
1113	{	1498	{
1114	TRANSFER (ta);	1499	TRANSFER (ta);
1115	return 1;	1500	return 1;
1116	}	1501	}
1117	else	1502	else
…		…
1119	}	1504	}
1120		1505
1121	static int	1506	static int
1122	api_cede_notself (void)	1507	api_cede_notself (void)
1123	{	1508	{
		1509	dTHX;
1124	struct transfer_args ta;	1510	struct transfer_args ta;
1125		1511
1126	if (prepare_cede_notself (&ta))	1512	if (prepare_cede_notself (aTHX_ &ta))
1127	{	1513	{
1128	TRANSFER (ta);	1514	TRANSFER (ta);
1129	return 1;	1515	return 1;
1130	}	1516	}
1131	else	1517	else
1132	return 0;	1518	return 0;
1133	}	1519	}
1134		1520
		1521	static void
		1522	api_trace (SV *coro_sv, int flags)
		1523	{
		1524	dTHX;
		1525	struct coro *coro = SvSTATE (coro_sv);
		1526
		1527	if (flags & CC_TRACE)
		1528	{
		1529	if (!coro->cctx)
		1530	coro->cctx = cctx_new ();
		1531	else if (!(coro->cctx->flags & CC_TRACE))
		1532	croak ("cannot enable tracing on coroutine with custom stack");
		1533
		1534	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1535	}
		1536	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1537	{
		1538	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1539
		1540	if (coro->flags & CF_RUNNING)
		1541	PL_runops = RUNOPS_DEFAULT;
		1542	else
		1543	coro->slot->runops = RUNOPS_DEFAULT;
		1544	}
		1545	}
		1546
1135	MODULE = Coro::State PACKAGE = Coro::State	1547	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1136		1548
1137	PROTOTYPES: DISABLE	1549	PROTOTYPES: DISABLE
1138		1550
1139	BOOT:	1551	BOOT:
1140	{	1552	{
1141	#ifdef USE_ITHREADS	1553	#ifdef USE_ITHREADS
1142	MUTEX_INIT (&coro_mutex);	1554	MUTEX_INIT (&coro_mutex);
1143	#endif	1555	#endif
1144	BOOT_PAGESIZE;	1556	BOOT_PAGESIZE;
1145		1557
		1558	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1559	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1560
		1561	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1562	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1563	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1564	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1565
		1566	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1567	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1568	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1569
1146	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1570	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1147		1571
		1572	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1573	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1148	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1574	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1149	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1150	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1151	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1152	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1153		1576
1154	main_mainstack = PL_mainstack;	1577	main_mainstack = PL_mainstack;
		1578	main_top_env = PL_top_env;
		1579
		1580	while (main_top_env->je_prev)
		1581	main_top_env = main_top_env->je_prev;
1155		1582
1156	coroapi.ver = CORO_API_VERSION;	1583	coroapi.ver = CORO_API_VERSION;
		1584	coroapi.rev = CORO_API_REVISION;
1157	coroapi.transfer = api_transfer;	1585	coroapi.transfer = api_transfer;
1158		1586
1159	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1587	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1160	}	1588	}
1161		1589
1162	SV *	1590	SV *
1163	new (char *klass, ...)	1591	new (char *klass, ...)
1164	CODE:	1592	CODE:
1165	{	1593	{
1166	struct coro *coro;	1594	struct coro *coro;
		1595	MAGIC *mg;
1167	HV *hv;	1596	HV *hv;
1168	int i;	1597	int i;
1169		1598
1170	Newz (0, coro, 1, struct coro);	1599	Newz (0, coro, 1, struct coro);
1171	coro->args = newAV ();	1600	coro->args = newAV ();
1172	coro->save = CORO_SAVE_ALL;
1173	coro->flags = CF_NEW;	1601	coro->flags = CF_NEW;
1174		1602
		1603	if (coro_first) coro_first->prev = coro;
		1604	coro->next = coro_first;
		1605	coro_first = coro;
		1606
1175	hv = newHV ();	1607	coro->hv = hv = newHV ();
1176	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1608	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1609	mg->mg_flags \|= MGf_DUP;
1177	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1610	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1178		1611
		1612	av_extend (coro->args, items - 1);
1179	for (i = 1; i < items; i++)	1613	for (i = 1; i < items; i++)
1180	av_push (coro->args, newSVsv (ST (i)));	1614	av_push (coro->args, newSVsv (ST (i)));
1181	}	1615	}
1182	OUTPUT:	1616	OUTPUT:
1183	RETVAL	1617	RETVAL
1184		1618
1185	int	1619	# these not obviously related functions are all rolled into the same xs
1186	save (SV *coro, int new_save = -1)	1620	# function to increase chances that they all will call transfer with the same
1187	CODE:	1621	# stack offset
1188	RETVAL = api_save (coro, new_save);
1189	OUTPUT:
1190	RETVAL
1191
1192	void	1622	void
1193	_set_stacklevel (...)	1623	_set_stacklevel (...)
1194	ALIAS:	1624	ALIAS:
1195	Coro::State::transfer = 1	1625	Coro::State::transfer = 1
1196	Coro::schedule = 2	1626	Coro::schedule = 2
…		…
1198	Coro::cede_notself = 4	1628	Coro::cede_notself = 4
1199	CODE:	1629	CODE:
1200	{	1630	{
1201	struct transfer_args ta;	1631	struct transfer_args ta;
1202		1632
		1633	PUTBACK;
1203	switch (ix)	1634	switch (ix)
1204	{	1635	{
1205	case 0:	1636	case 0:
1206	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1637	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1207	ta.next = 0;	1638	ta.next = 0;
…		…
1209		1640
1210	case 1:	1641	case 1:
1211	if (items != 2)	1642	if (items != 2)
1212	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1643	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1213		1644
1214	prepare_transfer (&ta, ST (0), ST (1));	1645	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1215	break;	1646	break;
1216		1647
1217	case 2:	1648	case 2:
1218	prepare_schedule (&ta);	1649	prepare_schedule (aTHX_ &ta);
1219	break;	1650	break;
1220		1651
1221	case 3:	1652	case 3:
1222	prepare_cede (&ta);	1653	prepare_cede (aTHX_ &ta);
1223	break;	1654	break;
1224		1655
1225	case 4:	1656	case 4:
1226	if (!prepare_cede_notself (&ta))	1657	if (!prepare_cede_notself (aTHX_ &ta))
1227	XSRETURN_EMPTY;	1658	XSRETURN_EMPTY;
1228		1659
1229	break;	1660	break;
1230	}	1661	}
		1662	SPAGAIN;
1231		1663
1232	BARRIER;	1664	BARRIER;
		1665	PUTBACK;
1233	TRANSFER (ta);	1666	TRANSFER (ta);
1234		1667	SPAGAIN; /* might be the sp of a different coroutine now */
1235	if (GIMME_V != G_VOID && ta.next != ta.prev)	1668	/* be extra careful not to ever do anything after TRANSFER */
1236	XSRETURN_YES;
1237	}	1669	}
1238		1670
1239	bool	1671	bool
1240	_destroy (SV *coro_sv)	1672	_destroy (SV *coro_sv)
1241	CODE:	1673	CODE:
1242	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1674	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1243	OUTPUT:	1675	OUTPUT:
1244	RETVAL	1676	RETVAL
1245		1677
1246	void	1678	void
1247	_exit (code)	1679	_exit (code)
…		…
1249	PROTOTYPE: $	1681	PROTOTYPE: $
1250	CODE:	1682	CODE:
1251	_exit (code);	1683	_exit (code);
1252		1684
1253	int	1685	int
		1686	cctx_stacksize (int new_stacksize = 0)
		1687	CODE:
		1688	RETVAL = coro_stacksize;
		1689	if (new_stacksize)
		1690	coro_stacksize = new_stacksize;
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	int
1254	cctx_count ()	1695	cctx_count ()
1255	CODE:	1696	CODE:
1256	RETVAL = cctx_count;	1697	RETVAL = cctx_count;
1257	OUTPUT:	1698	OUTPUT:
1258	RETVAL	1699	RETVAL
…		…
1262	CODE:	1703	CODE:
1263	RETVAL = cctx_idle;	1704	RETVAL = cctx_idle;
1264	OUTPUT:	1705	OUTPUT:
1265	RETVAL	1706	RETVAL
1266		1707
		1708	void
		1709	list ()
		1710	PPCODE:
		1711	{
		1712	struct coro *coro;
		1713	for (coro = coro_first; coro; coro = coro->next)
		1714	if (coro->hv)
		1715	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1716	}
		1717
		1718	void
		1719	call (Coro::State coro, SV *coderef)
		1720	ALIAS:
		1721	eval = 1
		1722	CODE:
		1723	{
		1724	if (coro->mainstack)
		1725	{
		1726	struct coro temp;
		1727
		1728	if (!(coro->flags & CF_RUNNING))
		1729	{
		1730	PUTBACK;
		1731	save_perl (aTHX_ &temp);
		1732	load_perl (aTHX_ coro);
		1733	}
		1734
		1735	{
		1736	dSP;
		1737	ENTER;
		1738	SAVETMPS;
		1739	PUTBACK;
		1740	PUSHSTACK;
		1741	PUSHMARK (SP);
		1742
		1743	if (ix)
		1744	eval_sv (coderef, 0);
		1745	else
		1746	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1747
		1748	POPSTACK;
		1749	SPAGAIN;
		1750	FREETMPS;
		1751	LEAVE;
		1752	PUTBACK;
		1753	}
		1754
		1755	if (!(coro->flags & CF_RUNNING))
		1756	{
		1757	save_perl (aTHX_ coro);
		1758	load_perl (aTHX_ &temp);
		1759	SPAGAIN;
		1760	}
		1761	}
		1762	}
		1763
		1764	SV *
		1765	is_ready (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	is_ready = CF_READY
		1769	is_running = CF_RUNNING
		1770	is_new = CF_NEW
		1771	is_destroyed = CF_DESTROYED
		1772	CODE:
		1773	RETVAL = boolSV (coro->flags & ix);
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	void
		1778	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1779
		1780	SV *
		1781	has_stack (Coro::State coro)
		1782	PROTOTYPE: $
		1783	CODE:
		1784	RETVAL = boolSV (!!coro->cctx);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	int
		1789	is_traced (Coro::State coro)
		1790	PROTOTYPE: $
		1791	CODE:
		1792	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1793	OUTPUT:
		1794	RETVAL
		1795
		1796	IV
		1797	rss (Coro::State coro)
		1798	PROTOTYPE: $
		1799	ALIAS:
		1800	usecount = 1
		1801	CODE:
		1802	switch (ix)
		1803	{
		1804	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1805	case 1: RETVAL = coro->usecount; break;
		1806	}
		1807	OUTPUT:
		1808	RETVAL
		1809
		1810
1267	MODULE = Coro::State PACKAGE = Coro	1811	MODULE = Coro::State PACKAGE = Coro
1268		1812
1269	BOOT:	1813	BOOT:
1270	{	1814	{
1271	int i;	1815	int i;
1272		1816
		1817	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1818	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1819	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1820
		1821	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1822	SvREADONLY_on (coro_current);
		1823
1273	coro_stash = gv_stashpv ("Coro", TRUE);	1824	coro_stash = gv_stashpv ("Coro", TRUE);
1274		1825
1275	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1826	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1276	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1827	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1277	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1828	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1278	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1829	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1279	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1830	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1280	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1831	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1281		1832
1282	coro_current = get_sv ("Coro::current", FALSE);
1283	SvREADONLY_on (coro_current);
1284
1285	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1833	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1286	coro_ready[i] = newAV ();	1834	coro_ready[i] = newAV ();
1287		1835
1288	{	1836	{
1289	SV *sv = perl_get_sv("Coro::API", 1);	1837	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1838	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1290		1839
1291	coroapi.schedule = api_schedule;	1840	coroapi.schedule = api_schedule;
1292	coroapi.save = api_save;
1293	coroapi.cede = api_cede;	1841	coroapi.cede = api_cede;
1294	coroapi.cede_notself = api_cede_notself;	1842	coroapi.cede_notself = api_cede_notself;
1295	coroapi.ready = api_ready;	1843	coroapi.ready = api_ready;
1296	coroapi.is_ready = api_is_ready;	1844	coroapi.is_ready = api_is_ready;
1297	coroapi.nready = &coro_nready;	1845	coroapi.nready = &coro_nready;
…		…
1338	CODE:	1886	CODE:
1339	RETVAL = boolSV (api_ready (self));	1887	RETVAL = boolSV (api_ready (self));
1340	OUTPUT:	1888	OUTPUT:
1341	RETVAL	1889	RETVAL
1342		1890
1343	SV *
1344	is_ready (SV *self)
1345	PROTOTYPE: $
1346	CODE:
1347	RETVAL = boolSV (api_is_ready (self));
1348	OUTPUT:
1349	RETVAL
1350
1351	int	1891	int
1352	nready (...)	1892	nready (...)
1353	PROTOTYPE:	1893	PROTOTYPE:
1354	CODE:	1894	CODE:
1355	RETVAL = coro_nready;	1895	RETVAL = coro_nready;
1356	OUTPUT:	1896	OUTPUT:
1357	RETVAL	1897	RETVAL
1358		1898
		1899	void
		1900	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1901	PROTOTYPE: $;$
		1902	CODE:
		1903	SvREFCNT_dec (self->throw);
		1904	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1905
		1906	# for async_pool speedup
		1907	void
		1908	_pool_1 (SV *cb)
		1909	CODE:
		1910	{
		1911	struct coro *coro = SvSTATE (coro_current);
		1912	HV hv = (HV )SvRV (coro_current);
		1913	AV *defav = GvAV (PL_defgv);
		1914	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1915	AV *invoke_av;
		1916	int i, len;
		1917
		1918	if (!invoke)
		1919	{
		1920	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1921	croak ("\3async_pool terminate\2\n");
		1922	}
		1923
		1924	SvREFCNT_dec (coro->saved_deffh);
		1925	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1926
		1927	hv_store (hv, "desc", sizeof ("desc") - 1,
		1928	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1929
		1930	invoke_av = (AV *)SvRV (invoke);
		1931	len = av_len (invoke_av);
		1932
		1933	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1934
		1935	if (len > 0)
		1936	{
		1937	av_fill (defav, len - 1);
		1938	for (i = 0; i < len; ++i)
		1939	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1940	}
		1941
		1942	SvREFCNT_dec (invoke);
		1943	}
		1944
		1945	void
		1946	_pool_2 (SV *cb)
		1947	CODE:
		1948	{
		1949	struct coro *coro = SvSTATE (coro_current);
		1950
		1951	sv_setsv (cb, &PL_sv_undef);
		1952
		1953	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1954	coro->saved_deffh = 0;
		1955
		1956	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1957	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1958	{
		1959	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1960	croak ("\3async_pool terminate\2\n");
		1961	}
		1962
		1963	av_clear (GvAV (PL_defgv));
		1964	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1965	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1966
		1967	coro->prio = 0;
		1968
		1969	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1970	api_trace (coro_current, 0);
		1971
		1972	av_push (av_async_pool, newSVsv (coro_current));
		1973	}
		1974
		1975
1359	MODULE = Coro::State PACKAGE = Coro::AIO	1976	MODULE = Coro::State PACKAGE = Coro::AIO
1360		1977
1361	SV *	1978	SV *
1362	_get_state ()	1979	_get_state ()
1363	CODE:	1980	CODE:

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Comparing Coro/Coro/State.xs (file contents): Revision 1.138 by root, Sun Jan 14 20:49:45 2007 UTC vs. Revision 1.223 by root, Wed Feb 13 15:46:00 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.138 by root, Sun Jan 14 20:49:45 2007 UTC vs.
Revision 1.223 by root, Wed Feb 13 15:46:00 2008 UTC