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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.184 by root, Thu Oct 4 13:45:56 2007 UTC vs.
Revision 1.230 by root, Mon Apr 14 11:28:59 2008 UTC

…		…
1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
2		2
3	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#include <stdio.h>	12	#include <stdio.h>
12	#include <errno.h>	13	#include <errno.h>
13	#include <assert.h>	14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
14		16
15	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
16	# include <unistd.h>	18	# include <unistd.h>
17	# include <sys/mman.h>	19	# include <sys/mman.h>
18	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
70	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
71	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
72	# endif	74	# endif
73	#endif	75	#endif
74		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
75	/* 5.8.7 */	90	/* 5.8.7 */
76	#ifndef SvRV_set	91	#ifndef SvRV_set
77	# define SvRV_set(s,v) SvRV(s) = (v)	92	# define SvRV_set(s,v) SvRV(s) = (v)
78	#endif	93	#endif
79		94
…		…
98	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
99		114
100	#if __GNUC__ >= 3	115	#if __GNUC__ >= 3
101	# define attribute(x) __attribute__(x)	116	# define attribute(x) __attribute__(x)
102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
103	#else	119	#else
104	# define attribute(x)	120	# define attribute(x)
105	# define BARRIER	121	# define BARRIER
		122	# define expect(expr,value) (expr)
106	#endif	123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
107		127
108	#define NOINLINE attribute ((noinline))	128	#define NOINLINE attribute ((noinline))
109		129
110	#include "CoroAPI.h"	130	#include "CoroAPI.h"
111		131
…		…
130	static size_t coro_stacksize = CORO_STACKSIZE;	150	static size_t coro_stacksize = CORO_STACKSIZE;
131	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
132	static AV main_mainstack; / used to differentiate between $main and others */	152	static AV main_mainstack; / used to differentiate between $main and others */
133	static JMPENV *main_top_env;	153	static JMPENV *main_top_env;
134	static HV coro_state_stash, coro_stash;	154	static HV coro_state_stash, coro_stash;
135	static SV coro_mortal; / will be freed after next transfer */	155	static volatile SV coro_mortal; / will be freed after next transfer */
136		156
137	static GV irsgv; / $/ */	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 */
138		162
139	/* async_pool helper stuff */	163	/* async_pool helper stuff */
140	static SV *sv_pool_rss;	164	static SV *sv_pool_rss;
141	static SV *sv_pool_size;	165	static SV *sv_pool_size;
142	static AV *av_async_pool;	166	static AV *av_async_pool;
…		…
178	CF_READY = 0x0002, /* coroutine is ready */	202	CF_READY = 0x0002, /* coroutine is ready */
179	CF_NEW = 0x0004, /* has never been switched to */	203	CF_NEW = 0x0004, /* has never been switched to */
180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
181	};	205	};
182		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
183	/* this is a structure representing a perl-level coroutine */	220	/* this is a structure representing a perl-level coroutine */
184	struct coro {	221	struct coro {
185	/* the c coroutine allocated to this perl coroutine, if any */	222	/* the c coroutine allocated to this perl coroutine, if any */
186	coro_cctx *cctx;	223	coro_cctx *cctx;
187		224
		225	/* process data */
		226	AV *mainstack;
		227	perl_slots slot; / basically the saved sp */
		228
188	/* data associated with this coroutine (initial args) */	229	AV args; / data associated with this coroutine (initial args) */
189	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
190	int refcnt;
191	int flags; /* CF_ flags */	231	int flags; /* CF_ flags */
192		232	HV hv; / the perl hash associated with this coro, if any */
193	/* optionally saved, might be zero */
194	AV defav; / @_ */
195	SV defsv; / $_ */
196	SV errsv; / $@ */
197	SV deffh; / default filehandle */
198	SV irssv; / $/ */
199	SV irssv_sv; / real $/ cache */
200
201	#define VAR(name,type) type name;
202	# include "state.h"
203	#undef VAR
204		233
205	/* statistics */	234	/* statistics */
206	int usecount; /* number of transfers to this coro */	235	int usecount; /* number of transfers to this coro */
207		236
208	/* coro process data */	237	/* coro process data */
209	int prio;	238	int prio;
210	//SV *throw;	239	SV throw; / exception to be thrown */
211		240
212	/* async_pool */	241	/* async_pool */
213	SV *saved_deffh;	242	SV *saved_deffh;
214		243
215	/* linked list */	244	/* linked list */
216	struct coro next, prev;	245	struct coro next, prev;
217	HV hv; / the perl hash associated with this coro, if any */
218	};	246	};
219		247
220	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
221	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
222		250
…		…
235	static int coro_nready;	263	static int coro_nready;
236	static struct coro *coro_first;	264	static struct coro *coro_first;
237		265
238	/ lowlevel stuff ********************************************************/	266	/ lowlevel stuff ********************************************************/
239		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,10,0)
		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
		278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,10,0)
		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 (5,10,0)
		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
240	static AV *	298	static AV *
241	coro_clone_padlist (pTHX_ CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
242	{	300	{
243	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
244	AV newpadlist, newpad;	302	AV newpadlist, newpad;
245		303
246	newpadlist = newAV ();	304	newpadlist = newAV ();
247	AvREAL_off (newpadlist);	305	AvREAL_off (newpadlist);
248	#if PERL_VERSION_ATLEAST (5,9,0)	306	#if PERL_VERSION_ATLEAST (5,10,0)
249	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250	#else	308	#else
251	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252	#endif	310	#endif
253	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
291		349
292	/* casting is fun. */	350	/* casting is fun. */
293	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	351	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
294	free_padlist (aTHX_ padlist);	352	free_padlist (aTHX_ padlist);
295		353
296	SvREFCNT_dec (av);
297
298	return 0;	354	return 0;
299	}	355	}
300		356
301	#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
302		359
303	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	};
304		364
305	#define CORO_MAGIC(cv) \	365	#define CORO_MAGIC(sv,type) \
306	SvMAGIC (cv) \	366	SvMAGIC (sv) \
307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	367	? SvMAGIC (sv)->mg_type == type \
308	? SvMAGIC (cv) \	368	? SvMAGIC (sv) \
309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	369	: mg_find (sv, type) \
310	: 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)
311		374
312	static struct coro *	375	static struct coro *
313	SvSTATE_ (pTHX_ SV *coro)	376	SvSTATE_ (pTHX_ SV *coro)
314	{	377	{
315	HV *stash;	378	HV *stash;
316	MAGIC *mg;	379	MAGIC *mg;
317		380
318	if (SvROK (coro))	381	if (SvROK (coro))
319	coro = SvRV (coro);	382	coro = SvRV (coro);
320		383
321	if (SvTYPE (coro) != SVt_PVHV)	384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
322	croak ("Coro::State object required");	385	croak ("Coro::State object required");
323		386
324	stash = SvSTASH (coro);	387	stash = SvSTASH (coro);
325	if (stash != coro_stash && stash != coro_state_stash)	388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
326	{	389	{
327	/* very slow, but rare, check */	390	/* very slow, but rare, check */
328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329	croak ("Coro::State object required");	392	croak ("Coro::State object required");
330	}	393	}
331		394
332	mg = CORO_MAGIC (coro);	395	mg = CORO_MAGIC_state (coro);
333	return (struct coro *)mg->mg_ptr;	396	return (struct coro *)mg->mg_ptr;
334	}	397	}
335		398
336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))	399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
337		400
338	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
339	static void	402	static void
340	get_padlist (pTHX_ CV *cv)	403	get_padlist (pTHX_ CV *cv)
341	{	404	{
342	MAGIC *mg = CORO_MAGIC (cv);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
343	AV *av;	406	AV *av;
344		407
345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
347	else	410	else
348	{	411	{
349	#if CORO_PREFER_PERL_FUNCTIONS	412	#if CORO_PREFER_PERL_FUNCTIONS
350	/* this is probably cleaner, but also slower? */	413	/* this is probably cleaner, but also slower? */
…		…
359	}	422	}
360		423
361	static void	424	static void
362	put_padlist (pTHX_ CV *cv)	425	put_padlist (pTHX_ CV *cv)
363	{	426	{
364	MAGIC *mg = CORO_MAGIC (cv);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
365	AV *av;	428	AV *av;
366		429
367	if (!mg)	430	if (expect_false (!mg))
368	{	431	mg = sv_magicext ((SV )cv, (SV )newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371	mg->mg_virtual = &vtbl_coro;
372	mg->mg_obj = (SV *)newAV ();
373	}
374		432
375	av = (AV *)mg->mg_obj;	433	av = (AV *)mg->mg_obj;
376		434
377	if (AvFILLp (av) >= AvMAX (av))	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
378	av_extend (av, AvMAX (av) + 1);	436	av_extend (av, AvMAX (av) + 1);
379		437
380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
381	}	439	}
382		440
383	/ load & save, init *****************************************************/	441	/ load & save, init *****************************************************/
384		442
385	static void	443	static void
386	load_perl (pTHX_ Coro__State c)	444	load_perl (pTHX_ Coro__State c)
387	{	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
388	#define VAR(name,type) PL_ ## name = c->name;	456	#define VAR(name,type) PL_ ## name = slot->name;
389	# include "state.h"	457	# include "state.h"
390	#undef VAR	458	#undef VAR
391
392	GvSV (PL_defgv) = c->defsv;
393	GvAV (PL_defgv) = c->defav;
394	GvSV (PL_errgv) = c->errsv;
395	GvSV (irsgv) = c->irssv_sv;
396		459
397	{	460	{
398	dSP;	461	dSP;
		462
399	CV *cv;	463	CV *cv;
400		464
401	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
402	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
403	{	467	{
404	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
405	CvDEPTH (cv) = PTR2IV (POPs);	469	CvDEPTH (cv) = PTR2IV (POPs);
406	CvPADLIST (cv) = (AV *)POPs;	470	CvPADLIST (cv) = (AV *)POPs;
407	}	471	}
…		…
426		490
427	XPUSHs (Nullsv);	491	XPUSHs (Nullsv);
428	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
429	for (;;)	493	for (;;)
430	{	494	{
431	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
432	{	496	{
433	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
434		498
435	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)	499	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
436	{	500	{
437	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
438		502
439	if (CvDEPTH (cv))	503	if (expect_true (CvDEPTH (cv)))
440	{	504	{
441	EXTEND (SP, 3);	505	EXTEND (SP, 3);
442	PUSHs ((SV *)CvPADLIST (cv));	506	PUSHs ((SV *)CvPADLIST (cv));
443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
444	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
…		…
447	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
448	}	512	}
449	}	513	}
450	}	514	}
451		515
452	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
453	break;	517	break;
454		518
455	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
456	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
457	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
458	}	522	}
459		523
460	PUTBACK;	524	PUTBACK;
461	}	525	}
462		526
		527	/* allocate some space on the context stack for our purposes */
		528	/* we manually unroll here, as usually 2 slots is enough */
		529	if (SLOT_COUNT >= 1) CXINC;
		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 */
		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
		543
463	c->defav = GvAV (PL_defgv);	544	slot->defav = GvAV (PL_defgv);
464	c->defsv = DEFSV;	545	slot->defsv = DEFSV;
465	c->errsv = ERRSV;	546	slot->errsv = ERRSV;
466	c->irssv_sv = GvSV (irsgv);	547	slot->irsgv = GvSV (irsgv);
467		548
468	#define VAR(name,type)c->name = PL_ ## name;	549	#define VAR(name,type) slot->name = PL_ ## name;
469	# include "state.h"	550	# include "state.h"
470	#undef VAR	551	#undef VAR
		552	}
471	}	553	}
472		554
473	/*	555	/*
474	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
475	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
…		…
480	# define coro_init_stacks init_stacks	562	# define coro_init_stacks init_stacks
481	#else	563	#else
482	static void	564	static void
483	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
484	{	566	{
485	PL_curstackinfo = new_stackinfo(64, 6);	567	PL_curstackinfo = new_stackinfo(32, 8);
486	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
487	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
489		571
490	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
491	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
493		575
494	New(50,PL_tmps_stack,64,SV*);	576	New(50,PL_tmps_stack,32,SV*);
495	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
496	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
497	PL_tmps_max = 64;	579	PL_tmps_max = 32;
498		580
499	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
500	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
501	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
502		584
503	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
504	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
505	#endif	587	#endif
506		588
507	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
508	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
509	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
510		592
511	New(54,PL_savestack,64,ANY);	593	New(54,PL_savestack,24,ANY);
512	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
513	PL_savestack_max = 64;	595	PL_savestack_max = 24;
514		596
515	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,10,0)
516	New(54,PL_retstack,4,OP*);	598	New(54,PL_retstack,4,OP*);
517	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
518	PL_retstack_max = 4;	600	PL_retstack_max = 4;
519	#endif	601	#endif
520	}	602	}
…		…
543		625
544	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
545	Safefree (PL_markstack);	627	Safefree (PL_markstack);
546	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
547	Safefree (PL_savestack);	629	Safefree (PL_savestack);
548	#if !PERL_VERSION_ATLEAST (5,9,0)	630	#if !PERL_VERSION_ATLEAST (5,10,0)
549	Safefree (PL_retstack);	631	Safefree (PL_retstack);
550	#endif	632	#endif
551	}	633	}
552		634
553	static size_t	635	static size_t
…		…
555	{	637	{
556	size_t rss = sizeof (*coro);	638	size_t rss = sizeof (*coro);
557		639
558	if (coro->mainstack)	640	if (coro->mainstack)
559	{	641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
560	if (coro->flags & CF_RUNNING)	645	if (coro->flags & CF_RUNNING)
561	{	646	{
		647	slot = &tmp_slot;
		648
562	#define VAR(name,type)coro->name = PL_ ## name;	649	#define VAR(name,type) slot->name = PL_ ## name;
563	# include "state.h"	650	# include "state.h"
564	#undef VAR	651	#undef VAR
565	}	652	}
		653	else
		654	slot = coro->slot;
566		655
567	rss += sizeof (coro->curstackinfo);	656	rss += sizeof (slot->curstackinfo);
568	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
570	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);	658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
571	rss += coro->tmps_max * sizeof (SV *);	659	rss += slot->tmps_max * sizeof (SV *);
572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);	660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
573	rss += coro->scopestack_max * sizeof (I32);	661	rss += slot->scopestack_max * sizeof (I32);
574	rss += coro->savestack_max * sizeof (ANY);	662	rss += slot->savestack_max * sizeof (ANY);
575		663
576	#if !PERL_VERSION_ATLEAST (5,9,0)	664	#if !PERL_VERSION_ATLEAST (5,10,0)
577	rss += coro->retstack_max * sizeof (OP *);	665	rss += slot->retstack_max * sizeof (OP *);
578	#endif	666	#endif
579	}	667	}
580		668
581	return rss;	669	return rss;
582	}	670	}
583		671
584	/ coroutine stack handling **********************************************/	672	/ coroutine stack handling **********************************************/
		673
		674	static int (orig_sigelem_get) (pTHX_ SV sv, MAGIC *mg);
		675	static int (orig_sigelem_set) (pTHX_ SV sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV sv, MAGIC mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV sv, MAGIC mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV old = svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
585		723
586	static void	724	static void
587	coro_setup (pTHX_ struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
588	{	726	{
589	/*	727	/*
…		…
594	PL_runops = RUNOPS_DEFAULT;	732	PL_runops = RUNOPS_DEFAULT;
595	PL_curcop = &PL_compiling;	733	PL_curcop = &PL_compiling;
596	PL_in_eval = EVAL_NULL;	734	PL_in_eval = EVAL_NULL;
597	PL_comppad = 0;	735	PL_comppad = 0;
598	PL_curpm = 0;	736	PL_curpm = 0;
		737	PL_curpad = 0;
599	PL_localizing = 0;	738	PL_localizing = 0;
600	PL_dirty = 0;	739	PL_dirty = 0;
601	PL_restartop = 0;	740	PL_restartop = 0;
		741	#if PERL_VERSION_ATLEAST (5,10,0)
		742	PL_parser = 0;
		743	#endif
		744
		745	/* recreate the die/warn hooks */
		746	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		747	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
602		748
603	GvSV (PL_defgv) = NEWSV (0, 0);	749	GvSV (PL_defgv) = newSV (0);
604	GvAV (PL_defgv) = coro->args; coro->args = 0;	750	GvAV (PL_defgv) = coro->args; coro->args = 0;
605	GvSV (PL_errgv) = NEWSV (0, 0);	751	GvSV (PL_errgv) = newSV (0);
606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);	752	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
607	PL_rs = newSVsv (GvSV (irsgv));	753	PL_rs = newSVsv (GvSV (irsgv));
608		754	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
609	{
610	IO *io = newIO ();
611	PL_defoutgv = newGVgen ("Coro");
612	GvIOp(PL_defoutgv) = io;
613	IoTYPE (io) = IoTYPE_WRONLY;
614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
615	IoFLAGS (io) \|= IOf_FLUSH;
616	}
617		755
618	{	756	{
619	dSP;	757	dSP;
620	LOGOP myop;	758	LOGOP myop;
621		759
622	Zero (&myop, 1, LOGOP);	760	Zero (&myop, 1, LOGOP);
623	myop.op_next = Nullop;	761	myop.op_next = Nullop;
624	myop.op_flags = OPf_WANT_VOID;	762	myop.op_flags = OPf_WANT_VOID;
625		763
626	PUSHMARK (SP);	764	PUSHMARK (SP);
627	XPUSHs (av_shift (GvAV (PL_defgv)));	765	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
628	PUTBACK;	766	PUTBACK;
629	PL_op = (OP *)&myop;	767	PL_op = (OP *)&myop;
630	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	768	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631	SPAGAIN;	769	SPAGAIN;
632	}	770	}
633		771
634	ENTER; /* necessary e.g. for dounwind */	772	/* this newly created coroutine might be run on an existing cctx which most
		773	* likely was suspended in set_stacklevel, called from entersub.
		774	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		775	* so we ENTER here for symmetry
		776	*/
		777	ENTER;
635	}	778	}
636		779
637	static void	780	static void
638	coro_destroy (pTHX_ struct coro *coro)	781	coro_destroy (pTHX_ struct coro *coro)
639	{	782	{
…		…
659	SvREFCNT_dec (GvSV (PL_errgv));	802	SvREFCNT_dec (GvSV (PL_errgv));
660	SvREFCNT_dec (PL_defoutgv);	803	SvREFCNT_dec (PL_defoutgv);
661	SvREFCNT_dec (PL_rs);	804	SvREFCNT_dec (PL_rs);
662	SvREFCNT_dec (GvSV (irsgv));	805	SvREFCNT_dec (GvSV (irsgv));
663		806
		807	SvREFCNT_dec (PL_diehook);
		808	SvREFCNT_dec (PL_warnhook);
		809
664	SvREFCNT_dec (coro->saved_deffh);	810	SvREFCNT_dec (coro->saved_deffh);
665	//SvREFCNT_dec (coro->throw);	811	SvREFCNT_dec (coro->throw);
666		812
667	coro_destroy_stacks (aTHX);	813	coro_destroy_stacks (aTHX);
668	}	814	}
669		815
670	static void	816	static void
671	free_coro_mortal (pTHX)	817	free_coro_mortal (pTHX)
672	{	818	{
673	if (coro_mortal)	819	if (expect_true (coro_mortal))
674	{	820	{
675	SvREFCNT_dec (coro_mortal);	821	SvREFCNT_dec (coro_mortal);
676	coro_mortal = 0;	822	coro_mortal = 0;
677	}	823	}
678	}	824	}
…		…
707	bot = PL_stack_base + cx->blk_oldsp + 1;	853	bot = PL_stack_base + cx->blk_oldsp + 1;
708	top = cx->blk_gimme == G_ARRAY ? SP + 1	854	top = cx->blk_gimme == G_ARRAY ? SP + 1
709	: cx->blk_gimme == G_SCALAR ? bot + 1	855	: cx->blk_gimme == G_SCALAR ? bot + 1
710	: bot;	856	: bot;
711		857
		858	av_extend (av, top - bot);
712	while (bot < top)	859	while (bot < top)
713	av_push (av, SvREFCNT_inc (*bot++));	860	av_push (av, SvREFCNT_inc (*bot++));
714		861
715	PL_runops = RUNOPS_DEFAULT;	862	PL_runops = RUNOPS_DEFAULT;
716	ENTER;	863	ENTER;
…		…
756	SAVETMPS;	903	SAVETMPS;
757	EXTEND (SP, 3);	904	EXTEND (SP, 3);
758	PUSHMARK (SP);	905	PUSHMARK (SP);
759	PUSHs (&PL_sv_yes);	906	PUSHs (&PL_sv_yes);
760	PUSHs (fullname);	907	PUSHs (fullname);
761	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);	908	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
762	PUTBACK;	909	PUTBACK;
763	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);	910	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
764	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);	911	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
765	SPAGAIN;	912	SPAGAIN;
766	FREETMPS;	913	FREETMPS;
…		…
802		949
803	/* inject a fake call to Coro::State::_cctx_init into the execution */	950	/* inject a fake call to Coro::State::_cctx_init into the execution */
804	/* _cctx_init should be careful, as it could be called at almost any time */	951	/* _cctx_init should be careful, as it could be called at almost any time */
805	/* during execution of a perl program */	952	/* during execution of a perl program */
806	static void NOINLINE	953	static void NOINLINE
807	prepare_cctx (pTHX_ coro_cctx *cctx)	954	cctx_prepare (pTHX_ coro_cctx *cctx)
808	{	955	{
809	dSP;	956	dSP;
810	LOGOP myop;	957	LOGOP myop;
811		958
812	PL_top_env = &PL_start_env;	959	PL_top_env = &PL_start_env;
…		…
830		977
831	/*	978	/*
832	* this is a _very_ stripped down perl interpreter ;)	979	* this is a _very_ stripped down perl interpreter ;)
833	*/	980	*/
834	static void	981	static void
835	coro_run (void *arg)	982	cctx_run (void *arg)
836	{	983	{
837	dTHX;	984	dTHX;
838		985
839	/* coro_run is the alternative tail of transfer(), so unlock here. */	986	/* cctx_run is the alternative tail of transfer(), so unlock here. */
840	UNLOCK;	987	UNLOCK;
841		988
842	/* we now skip the entersub that lead to transfer() */	989	/* we now skip the entersub that lead to transfer() */
843	PL_op = PL_op->op_next;	990	PL_op = PL_op->op_next;
844		991
845	/* inject a fake subroutine call to cctx_init */	992	/* inject a fake subroutine call to cctx_init */
846	prepare_cctx (aTHX_ (coro_cctx *)arg);	993	cctx_prepare (aTHX_ (coro_cctx *)arg);
847		994
848	/* somebody or something will hit me for both perl_run and PL_restartop */	995	/* somebody or something will hit me for both perl_run and PL_restartop */
849	PL_restartop = PL_op;	996	PL_restartop = PL_op;
850	perl_run (PL_curinterp);	997	perl_run (PL_curinterp);
851		998
…		…
870	++cctx_count;	1017	++cctx_count;
871		1018
872	Newz (0, cctx, 1, coro_cctx);	1019	Newz (0, cctx, 1, coro_cctx);
873		1020
874	#if HAVE_MMAP	1021	#if HAVE_MMAP
875
876	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1022	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
877	/* mmap supposedly does allocate-on-write for us */	1023	/* mmap supposedly does allocate-on-write for us */
878	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	1024	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
879		1025
880	if (cctx->sptr != (void *)-1)	1026	if (cctx->sptr != (void *)-1)
…		…
901	stack_start = cctx->sptr;	1047	stack_start = cctx->sptr;
902	stack_size = cctx->ssize;	1048	stack_size = cctx->ssize;
903	}	1049	}
904		1050
905	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);	1051	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
906	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);	1052	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
907		1053
908	return cctx;	1054	return cctx;
909	}	1055	}
910		1056
911	static void	1057	static void
…		…
928	Safefree (cctx->sptr);	1074	Safefree (cctx->sptr);
929		1075
930	Safefree (cctx);	1076	Safefree (cctx);
931	}	1077	}
932		1078
		1079	/* wether this cctx should be destructed */
		1080	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1081
933	static coro_cctx *	1082	static coro_cctx *
934	cctx_get (pTHX)	1083	cctx_get (pTHX)
935	{	1084	{
936	while (cctx_first)	1085	while (expect_true (cctx_first))
937	{	1086	{
938	coro_cctx *cctx = cctx_first;	1087	coro_cctx *cctx = cctx_first;
939	cctx_first = cctx->next;	1088	cctx_first = cctx->next;
940	--cctx_idle;	1089	--cctx_idle;
941		1090
942	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))	1091	if (expect_true (!CCTX_EXPIRED (cctx)))
943	return cctx;	1092	return cctx;
944		1093
945	cctx_destroy (cctx);	1094	cctx_destroy (cctx);
946	}	1095	}
947		1096
…		…
950		1099
951	static void	1100	static void
952	cctx_put (coro_cctx *cctx)	1101	cctx_put (coro_cctx *cctx)
953	{	1102	{
954	/* free another cctx if overlimit */	1103	/* free another cctx if overlimit */
955	if (cctx_idle >= MAX_IDLE_CCTX)	1104	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
956	{	1105	{
957	coro_cctx *first = cctx_first;	1106	coro_cctx *first = cctx_first;
958	cctx_first = first->next;	1107	cctx_first = first->next;
959	--cctx_idle;	1108	--cctx_idle;
960		1109
…		…
966	cctx_first = cctx;	1115	cctx_first = cctx;
967	}	1116	}
968		1117
969	/ coroutine switching ***************************************************/	1118	/ coroutine switching ***************************************************/
970		1119
971	static void NOINLINE	1120	static void
972	transfer_check (pTHX_ struct coro prev, struct coro next)	1121	transfer_check (pTHX_ struct coro prev, struct coro next)
973	{	1122	{
974	if (prev != next)	1123	if (expect_true (prev != next))
975	{	1124	{
976	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))	1125	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
977	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");	1126	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
978		1127
979	if (next->flags & CF_RUNNING)	1128	if (expect_false (next->flags & CF_RUNNING))
980	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	1129	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
981		1130
982	if (next->flags & CF_DESTROYED)	1131	if (expect_false (next->flags & CF_DESTROYED))
983	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");	1132	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
984		1133
		1134	#if !PERL_VERSION_ATLEAST (5,10,0)
985	if (PL_lex_state != LEX_NOTPARSING)	1135	if (expect_false (PL_lex_state != LEX_NOTPARSING))
986	croak ("Coro::State::transfer called while parsing, but this is not supported");	1136	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1137	#endif
987	}	1138	}
988	}	1139	}
989		1140
990	/* always use the TRANSFER macro */	1141	/* always use the TRANSFER macro */
991	static void NOINLINE	1142	static void NOINLINE
992	transfer (pTHX_ struct coro prev, struct coro next)	1143	transfer (pTHX_ struct coro prev, struct coro next, int force_cctx)
993	{	1144	{
994	dSTACKLEVEL;	1145	dSTACKLEVEL;
		1146	static volatile int has_throw;
995		1147
996	/* sometimes transfer is only called to set idle_sp */	1148	/* sometimes transfer is only called to set idle_sp */
997	if (!next)	1149	if (expect_false (!next))
998	{	1150	{
999	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1151	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1000	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */	1152	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
1001	}	1153	}
1002	else if (prev != next)	1154	else if (expect_true (prev != next))
1003	{	1155	{
1004	coro_cctx *prev__cctx;	1156	coro_cctx *prev__cctx;
1005		1157
1006	if (prev->flags & CF_NEW)	1158	if (expect_false (prev->flags & CF_NEW))
1007	{	1159	{
1008	/* create a new empty context */	1160	/* create a new empty context */
1009	Newz (0, prev->cctx, 1, coro_cctx);	1161	Newz (0, prev->cctx, 1, coro_cctx);
1010	prev->flags &= ~CF_NEW;	1162	prev->flags &= ~CF_NEW;
1011	prev->flags \|= CF_RUNNING;	1163	prev->flags \|= CF_RUNNING;
…		…
1014	prev->flags &= ~CF_RUNNING;	1166	prev->flags &= ~CF_RUNNING;
1015	next->flags \|= CF_RUNNING;	1167	next->flags \|= CF_RUNNING;
1016		1168
1017	LOCK;	1169	LOCK;
1018		1170
		1171	/* first get rid of the old state */
		1172	save_perl (aTHX_ prev);
		1173
1019	if (next->flags & CF_NEW)	1174	if (expect_false (next->flags & CF_NEW))
1020	{	1175	{
1021	/* need to start coroutine */	1176	/* need to start coroutine */
1022	next->flags &= ~CF_NEW;	1177	next->flags &= ~CF_NEW;
1023	/* first get rid of the old state */
1024	save_perl (aTHX_ prev);
1025	/* setup coroutine call */	1178	/* setup coroutine call */
1026	coro_setup (aTHX_ next);	1179	coro_setup (aTHX_ next);
1027	}	1180	}
1028	else	1181	else
1029	{
1030	/* coroutine already started */
1031	save_perl (aTHX_ prev);
1032	load_perl (aTHX_ next);	1182	load_perl (aTHX_ next);
1033	}
1034		1183
1035	prev__cctx = prev->cctx;	1184	prev__cctx = prev->cctx;
1036		1185
1037	/* possibly "free" the cctx */	1186	/* possibly "free" the cctx */
1038	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))	1187	if (expect_true (
		1188	prev__cctx->idle_sp == STACKLEVEL
		1189	&& !(prev__cctx->flags & CC_TRACE)
		1190	&& !force_cctx
		1191	))
1039	{	1192	{
1040	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1193	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1041	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1194	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1042		1195
1043	prev->cctx = 0;	1196	prev->cctx = 0;
1044		1197
		1198	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1199	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1200	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1201	if (!next->cctx)
		1202	next->cctx = cctx_get (aTHX);
		1203
1045	cctx_put (prev__cctx);	1204	cctx_put (prev__cctx);
1046	}	1205	}
1047		1206
1048	++next->usecount;	1207	++next->usecount;
1049		1208
1050	if (!next->cctx)	1209	if (expect_true (!next->cctx))
1051	next->cctx = cctx_get (aTHX);	1210	next->cctx = cctx_get (aTHX);
1052		1211
		1212	has_throw = !!next->throw;
		1213
1053	if (prev__cctx != next->cctx)	1214	if (expect_false (prev__cctx != next->cctx))
1054	{	1215	{
1055	prev__cctx->top_env = PL_top_env;	1216	prev__cctx->top_env = PL_top_env;
1056	PL_top_env = next->cctx->top_env;	1217	PL_top_env = next->cctx->top_env;
1057	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1218	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1058	}	1219	}
1059		1220
1060	free_coro_mortal (aTHX);	1221	free_coro_mortal (aTHX);
1061	UNLOCK;	1222	UNLOCK;
		1223
		1224	if (expect_false (has_throw))
		1225	{
		1226	struct coro *coro = SvSTATE (coro_current);
		1227
		1228	if (coro->throw)
		1229	{
		1230	SV *exception = coro->throw;
		1231	coro->throw = 0;
		1232	sv_setsv (ERRSV, exception);
		1233	croak (0);
		1234	}
		1235	}
1062	}	1236	}
1063	}	1237	}
1064		1238
1065	struct transfer_args	1239	struct transfer_args
1066	{	1240	{
1067	struct coro prev, next;	1241	struct coro prev, next;
1068	};	1242	};
1069		1243
1070	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)	1244	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1071	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)	1245	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1072		1246
1073	/ high level stuff ******************************************************/	1247	/ high level stuff ******************************************************/
1074		1248
1075	static int	1249	static int
…		…
1101	save_perl (aTHX_ &temp);	1275	save_perl (aTHX_ &temp);
1102	load_perl (aTHX_ coro);	1276	load_perl (aTHX_ coro);
1103		1277
1104	coro_destroy (aTHX_ coro);	1278	coro_destroy (aTHX_ coro);
1105		1279
1106	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */	1280	load_perl (aTHX_ &temp);
1107		1281
1108	coro->mainstack = 0;	1282	coro->slot = 0;
1109	}	1283	}
1110		1284
1111	cctx_destroy (coro->cctx);	1285	cctx_destroy (coro->cctx);
1112	SvREFCNT_dec (coro->args);	1286	SvREFCNT_dec (coro->args);
1113		1287
…		…
1169	{	1343	{
1170	dTHX;	1344	dTHX;
1171	struct transfer_args ta;	1345	struct transfer_args ta;
1172		1346
1173	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1347	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1174	TRANSFER (ta);	1348	TRANSFER (ta, 1);
1175	}	1349	}
1176		1350
1177	/ Coro ******************************************************************/	1351	/ Coro ******************************************************************/
1178		1352
1179	static void	1353	static void
…		…
1181	{	1355	{
1182	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1356	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1183	}	1357	}
1184		1358
1185	static SV *	1359	static SV *
1186	coro_deq (pTHX_ int min_prio)	1360	coro_deq (pTHX)
1187	{	1361	{
1188	int prio = PRIO_MAX - PRIO_MIN;	1362	int prio;
1189		1363
1190	min_prio -= PRIO_MIN;
1191	if (min_prio < 0)
1192	min_prio = 0;
1193
1194	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1364	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1195	if (AvFILLp (coro_ready [prio]) >= 0)	1365	if (AvFILLp (coro_ready [prio]) >= 0)
1196	return av_shift (coro_ready [prio]);	1366	return av_shift (coro_ready [prio]);
1197		1367
1198	return 0;	1368	return 0;
1199	}	1369	}
…		…
1235	SV prev_sv, next_sv;	1405	SV prev_sv, next_sv;
1236		1406
1237	for (;;)	1407	for (;;)
1238	{	1408	{
1239	LOCK;	1409	LOCK;
1240	next_sv = coro_deq (aTHX_ PRIO_MIN);	1410	next_sv = coro_deq (aTHX);
1241		1411
1242	/* nothing to schedule: call the idle handler */	1412	/* nothing to schedule: call the idle handler */
1243	if (!next_sv)	1413	if (expect_false (!next_sv))
1244	{	1414	{
1245	dSP;	1415	dSP;
1246	UNLOCK;	1416	UNLOCK;
1247		1417
1248	ENTER;	1418	ENTER;
1249	SAVETMPS;	1419	SAVETMPS;
1250		1420
1251	PUSHMARK (SP);	1421	PUSHMARK (SP);
1252	PUTBACK;	1422	PUTBACK;
1253	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1423	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1424	SPAGAIN;
1254		1425
1255	FREETMPS;	1426	FREETMPS;
1256	LEAVE;	1427	LEAVE;
1257	continue;	1428	continue;
1258	}	1429	}
1259		1430
1260	ta->next = SvSTATE (next_sv);	1431	ta->next = SvSTATE (next_sv);
1261		1432
1262	/* cannot transfer to destroyed coros, skip and look for next */	1433	/* cannot transfer to destroyed coros, skip and look for next */
1263	if (ta->next->flags & CF_DESTROYED)	1434	if (expect_false (ta->next->flags & CF_DESTROYED))
1264	{	1435	{
1265	UNLOCK;	1436	UNLOCK;
1266	SvREFCNT_dec (next_sv);	1437	SvREFCNT_dec (next_sv);
1267	/* coro_nready is already taken care of by destroy */	1438	/* coro_nready is already taken care of by destroy */
1268	continue;	1439	continue;
…		…
1313	{	1484	{
1314	dTHX;	1485	dTHX;
1315	struct transfer_args ta;	1486	struct transfer_args ta;
1316		1487
1317	prepare_schedule (aTHX_ &ta);	1488	prepare_schedule (aTHX_ &ta);
1318	TRANSFER (ta);	1489	TRANSFER (ta, 1);
1319	}	1490	}
1320		1491
1321	static int	1492	static int
1322	api_cede (void)	1493	api_cede (void)
1323	{	1494	{
1324	dTHX;	1495	dTHX;
1325	struct transfer_args ta;	1496	struct transfer_args ta;
1326		1497
1327	prepare_cede (aTHX_ &ta);	1498	prepare_cede (aTHX_ &ta);
1328		1499
1329	if (ta.prev != ta.next)	1500	if (expect_true (ta.prev != ta.next))
1330	{	1501	{
1331	TRANSFER (ta);	1502	TRANSFER (ta, 1);
1332	return 1;	1503	return 1;
1333	}	1504	}
1334	else	1505	else
1335	return 0;	1506	return 0;
1336	}	1507	}
…		…
1341	dTHX;	1512	dTHX;
1342	struct transfer_args ta;	1513	struct transfer_args ta;
1343		1514
1344	if (prepare_cede_notself (aTHX_ &ta))	1515	if (prepare_cede_notself (aTHX_ &ta))
1345	{	1516	{
1346	TRANSFER (ta);	1517	TRANSFER (ta, 1);
1347	return 1;	1518	return 1;
1348	}	1519	}
1349	else	1520	else
1350	return 0;	1521	return 0;
1351	}	1522	}
…		…
1370	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);	1541	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
1371		1542
1372	if (coro->flags & CF_RUNNING)	1543	if (coro->flags & CF_RUNNING)
1373	PL_runops = RUNOPS_DEFAULT;	1544	PL_runops = RUNOPS_DEFAULT;
1374	else	1545	else
1375	coro->runops = RUNOPS_DEFAULT;	1546	coro->slot->runops = RUNOPS_DEFAULT;
1376	}	1547	}
1377	}	1548	}
1378		1549
1379	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_	1550	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1380		1551
…		…
1385	#ifdef USE_ITHREADS	1556	#ifdef USE_ITHREADS
1386	MUTEX_INIT (&coro_mutex);	1557	MUTEX_INIT (&coro_mutex);
1387	#endif	1558	#endif
1388	BOOT_PAGESIZE;	1559	BOOT_PAGESIZE;
1389		1560
1390	irsgv = gv_fetchpv ("/", 1, SVt_PV);	1561	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1562	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1563
		1564	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1565	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1566	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1567	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1568
		1569	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1570	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1571	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1391		1572
1392	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1573	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1393		1574
1394	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1395	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));	1576	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
…		…
1401		1582
1402	while (main_top_env->je_prev)	1583	while (main_top_env->je_prev)
1403	main_top_env = main_top_env->je_prev;	1584	main_top_env = main_top_env->je_prev;
1404		1585
1405	coroapi.ver = CORO_API_VERSION;	1586	coroapi.ver = CORO_API_VERSION;
		1587	coroapi.rev = CORO_API_REVISION;
1406	coroapi.transfer = api_transfer;	1588	coroapi.transfer = api_transfer;
1407		1589
1408	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1590	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1409	}	1591	}
1410		1592
1411	SV *	1593	SV *
1412	new (char *klass, ...)	1594	new (char *klass, ...)
1413	CODE:	1595	CODE:
1414	{	1596	{
1415	struct coro *coro;	1597	struct coro *coro;
		1598	MAGIC *mg;
1416	HV *hv;	1599	HV *hv;
1417	int i;	1600	int i;
1418		1601
1419	Newz (0, coro, 1, struct coro);	1602	Newz (0, coro, 1, struct coro);
1420	coro->args = newAV ();	1603	coro->args = newAV ();
…		…
1423	if (coro_first) coro_first->prev = coro;	1606	if (coro_first) coro_first->prev = coro;
1424	coro->next = coro_first;	1607	coro->next = coro_first;
1425	coro_first = coro;	1608	coro_first = coro;
1426		1609
1427	coro->hv = hv = newHV ();	1610	coro->hv = hv = newHV ();
1428	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1611	mg = sv_magicext ((SV )hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char )coro, 0);
		1612	mg->mg_flags \|= MGf_DUP;
1429	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1613	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1430		1614
		1615	av_extend (coro->args, items - 1);
1431	for (i = 1; i < items; i++)	1616	for (i = 1; i < items; i++)
1432	av_push (coro->args, newSVsv (ST (i)));	1617	av_push (coro->args, newSVsv (ST (i)));
1433	}	1618	}
1434	OUTPUT:	1619	OUTPUT:
1435	RETVAL	1620	RETVAL
…		…
1446	Coro::cede_notself = 4	1631	Coro::cede_notself = 4
1447	CODE:	1632	CODE:
1448	{	1633	{
1449	struct transfer_args ta;	1634	struct transfer_args ta;
1450		1635
		1636	PUTBACK;
1451	switch (ix)	1637	switch (ix)
1452	{	1638	{
1453	case 0:	1639	case 0:
1454	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1640	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1455	ta.next = 0;	1641	ta.next = 0;
…		…
1474	if (!prepare_cede_notself (aTHX_ &ta))	1660	if (!prepare_cede_notself (aTHX_ &ta))
1475	XSRETURN_EMPTY;	1661	XSRETURN_EMPTY;
1476		1662
1477	break;	1663	break;
1478	}	1664	}
		1665	SPAGAIN;
1479		1666
1480	BARRIER;	1667	BARRIER;
		1668	PUTBACK;
1481	TRANSFER (ta);	1669	TRANSFER (ta, 0);
1482		1670	SPAGAIN; /* might be the sp of a different coroutine now */
1483	if (GIMME_V != G_VOID && ta.next != ta.prev)	1671	/* be extra careful not to ever do anything after TRANSFER */
1484	XSRETURN_YES;
1485	}	1672	}
1486		1673
1487	bool	1674	bool
1488	_destroy (SV *coro_sv)	1675	_destroy (SV *coro_sv)
1489	CODE:	1676	CODE:
…		…
1538	CODE:	1725	CODE:
1539	{	1726	{
1540	if (coro->mainstack)	1727	if (coro->mainstack)
1541	{	1728	{
1542	struct coro temp;	1729	struct coro temp;
1543	Zero (&temp, 1, struct coro);
1544		1730
1545	if (!(coro->flags & CF_RUNNING))	1731	if (!(coro->flags & CF_RUNNING))
1546	{	1732	{
		1733	PUTBACK;
1547	save_perl (aTHX_ &temp);	1734	save_perl (aTHX_ &temp);
1548	load_perl (aTHX_ coro);	1735	load_perl (aTHX_ coro);
1549	}	1736	}
1550		1737
1551	{	1738	{
1552	dSP;	1739	dSP;
1553	ENTER;	1740	ENTER;
1554	SAVETMPS;	1741	SAVETMPS;
		1742	PUTBACK;
		1743	PUSHSTACK;
1555	PUSHMARK (SP);	1744	PUSHMARK (SP);
1556	PUTBACK;	1745
1557	if (ix)	1746	if (ix)
1558	eval_sv (coderef, 0);	1747	eval_sv (coderef, 0);
1559	else	1748	else
1560	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);	1749	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1750
		1751	POPSTACK;
1561	SPAGAIN;	1752	SPAGAIN;
1562	FREETMPS;	1753	FREETMPS;
1563	LEAVE;	1754	LEAVE;
1564	PUTBACK;	1755	PUTBACK;
1565	}	1756	}
1566		1757
1567	if (!(coro->flags & CF_RUNNING))	1758	if (!(coro->flags & CF_RUNNING))
1568	{	1759	{
1569	save_perl (aTHX_ coro);	1760	save_perl (aTHX_ coro);
1570	load_perl (aTHX_ &temp);	1761	load_perl (aTHX_ &temp);
		1762	SPAGAIN;
1571	}	1763	}
1572	}	1764	}
1573	}	1765	}
1574		1766
1575	SV *	1767	SV *
…		…
1616	case 1: RETVAL = coro->usecount; break;	1808	case 1: RETVAL = coro->usecount; break;
1617	}	1809	}
1618	OUTPUT:	1810	OUTPUT:
1619	RETVAL	1811	RETVAL
1620		1812
		1813	void
		1814	force_cctx ()
		1815	CODE:
		1816	struct coro *coro = SvSTATE (coro_current);
		1817	coro->cctx->idle_sp = 0;
1621		1818
1622	MODULE = Coro::State PACKAGE = Coro	1819	MODULE = Coro::State PACKAGE = Coro
1623		1820
1624	BOOT:	1821	BOOT:
1625	{	1822	{
1626	int i;	1823	int i;
1627		1824
1628	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);	1825	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1629	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);	1826	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1630	av_async_pool = get_av ("Coro::async_pool", TRUE);	1827	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1631		1828
1632	coro_current = get_sv ("Coro::current", FALSE);	1829	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1633	SvREADONLY_on (coro_current);	1830	SvREADONLY_on (coro_current);
1634		1831
1635	coro_stash = gv_stashpv ("Coro", TRUE);	1832	coro_stash = gv_stashpv ("Coro", TRUE);
1636		1833
1637	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1834	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1638	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1835	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1639	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1836	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1640	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1837	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
…		…
1643		1840
1644	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1841	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1645	coro_ready[i] = newAV ();	1842	coro_ready[i] = newAV ();
1646		1843
1647	{	1844	{
1648	SV *sv = perl_get_sv("Coro::API", 1);	1845	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1846	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1649		1847
1650	coroapi.schedule = api_schedule;	1848	coroapi.schedule = api_schedule;
1651	coroapi.cede = api_cede;	1849	coroapi.cede = api_cede;
1652	coroapi.cede_notself = api_cede_notself;	1850	coroapi.cede_notself = api_cede_notself;
1653	coroapi.ready = api_ready;	1851	coroapi.ready = api_ready;
…		…
1704	CODE:	1902	CODE:
1705	RETVAL = coro_nready;	1903	RETVAL = coro_nready;
1706	OUTPUT:	1904	OUTPUT:
1707	RETVAL	1905	RETVAL
1708		1906
		1907	void
		1908	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1909	PROTOTYPE: $;$
		1910	CODE:
		1911	SvREFCNT_dec (self->throw);
		1912	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1913
		1914	void
		1915	swap_defsv (Coro::State self)
		1916	PROTOTYPE: $
		1917	ALIAS:
		1918	swap_defav = 1
		1919	CODE:
		1920	if (!self->slot)
		1921	croak ("cannot swap state with coroutine that has no saved state");
		1922	else
		1923	{
		1924	SV src = ix ? (SV )&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1925	SV dst = ix ? (SV )&self->slot->defav : (SV **)&self->slot->defsv;
		1926
		1927	SV tmp = src; src = dst; *dst = tmp;
		1928	}
		1929
1709	# for async_pool speedup	1930	# for async_pool speedup
1710	void	1931	void
1711	_pool_1 (SV *cb)	1932	_pool_1 (SV *cb)
1712	CODE:	1933	CODE:
1713	{	1934	{
…		…
1717	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	1938	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1718	AV *invoke_av;	1939	AV *invoke_av;
1719	int i, len;	1940	int i, len;
1720		1941
1721	if (!invoke)	1942	if (!invoke)
		1943	{
		1944	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1722	croak ("\3terminate\2\n");	1945	croak ("\3async_pool terminate\2\n");
		1946	}
1723		1947
1724	SvREFCNT_dec (coro->saved_deffh);	1948	SvREFCNT_dec (coro->saved_deffh);
1725	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);	1949	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1726		1950
1727	hv_store (hv, "desc", sizeof ("desc") - 1,	1951	hv_store (hv, "desc", sizeof ("desc") - 1,
…		…
1753	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;	1977	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
1754	coro->saved_deffh = 0;	1978	coro->saved_deffh = 0;
1755		1979
1756	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)	1980	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1757	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	1981	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1982	{
		1983	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1758	croak ("\3terminate\2\n");	1984	croak ("\3async_pool terminate\2\n");
		1985	}
1759		1986
1760	av_clear (GvAV (PL_defgv));	1987	av_clear (GvAV (PL_defgv));
1761	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	1988	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1762	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	1989	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1763		1990

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Comparing Coro/Coro/State.xs (file contents): Revision 1.184 by root, Thu Oct 4 13:45:56 2007 UTC vs. Revision 1.230 by root, Mon Apr 14 11:28:59 2008 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.184 by root, Thu Oct 4 13:45:56 2007 UTC vs.
Revision 1.230 by root, Mon Apr 14 11:28:59 2008 UTC