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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs.
Revision 1.133 by root, Thu Jan 4 20:14:19 2007 UTC

…		…
1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	\|\| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
14	# endif	52	# endif
15	# ifndef call_sv	53	# ifndef call_sv
16	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
27	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
29	# endif	67	# endif
30	#endif	68	#endif
31		69
32	#include <errno.h>	70	/* 5.8.7 */
		71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
33		74
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	76	# undef STACKGUARD
36	#endif	77	#endif
37		78
38	#ifndef STACKGUARD	79	#ifndef STACKGUARD
39	# define STACKGUARD 0	80	# define STACKGUARD 0
40	#endif	81	#endif
41		82
42	#ifdef HAVE_MMAP	83	/* prefer perl internal functions over our own? */
43	# include <unistd.h>	84	#ifndef PREFER_PERL_FUNCTIONS
44	# include <sys/mman.h>	85	# define PREFER_PERL_FUNCTIONS 0
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	86	#endif
52	# include <limits.h>
53	# ifndef PAGESIZE
54	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif
60	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63		87
64	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
65	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
66	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
68		93
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		95
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		99	#else
		100	# define attribute(x)
		101	# define BARRIER
		102	#endif
		103
		104	#define NOINLINE attribute ((noinline))
72		105
73	#include "CoroAPI.h"	106	#include "CoroAPI.h"
74		107
75	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
…		…
79	#else	112	#else
80	# define LOCK (void)0	113	# define LOCK (void)0
81	# define UNLOCK (void)0	114	# define UNLOCK (void)0
82	#endif	115	#endif
83		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
		124
84	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
85	static AV main_mainstack; / used to differentiate between $main and others */	126	static AV main_mainstack; / used to differentiate between $main and others */
86	static HV coro_state_stash, coro_stash;	127	static HV coro_state_stash, coro_stash;
87	static SV coro_mortal; / will be freed after next transfer */	128	static SV coro_mortal; / will be freed after next transfer */
88		129
89	/* this is actually not just the c stack but also c registers etc... */	130	static struct coro_cctx *cctx_first;
		131	static int cctx_count, cctx_idle;
		132
		133	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	134	typedef struct coro_cctx {
91	struct coro_stack *next;	135	struct coro_cctx *next;
92		136
93	void *idle_sp;	137	/* the stack */
94	void *sptr;	138	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
96		140
97	/* cpu state */	141	/* cpu state */
		142	void idle_sp; / sp of top-level transfer/schedule/cede call */
		143	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		144	JMPENV *top_env;
98	coro_context cctx;	145	coro_context cctx;
99	} coro_stack;
100		146
101	static coro_stack *main_stack;	147	int inuse;
102		148
		149	#if USE_VALGRIND
		150	int valgrind_id;
		151	#endif
		152	} coro_cctx;
		153
		154	enum {
		155	CF_RUNNING = 0x0001, /* coroutine is running */
		156	CF_READY = 0x0002, /* coroutine is ready */
		157	CF_NEW = 0x0004, /* has never been switched to */
		158	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		159	};
		160
		161	/* this is a structure representing a perl-level coroutine */
103	struct coro {	162	struct coro {
104	/* optionally saved, might be zero */	163	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	164	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		165
150	/* data associated with this coroutine (initial args) */	166	/* data associated with this coroutine (initial args) */
151	AV *args;	167	AV *args;
152	int refcnt;	168	int refcnt;
		169	int save; /* CORO_SAVE flags */
		170	int flags; /* CF_ flags */
		171
		172	/* optionally saved, might be zero */
		173	AV defav; / @_ */
		174	SV defsv; / $_ */
		175	SV errsv; / $@ */
		176	SV irssv; / $/ */
		177	SV irssv_sv; / real $/ cache */
		178
		179	#define VAR(name,type) type name;
		180	# include "state.h"
		181	#undef VAR
		182
		183	/* coro process data */
		184	int prio;
153	};	185	};
154		186
155	typedef struct coro *Coro__State;	187	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	188	typedef struct coro *Coro__State_or_hashref;
157		189
158	static AV *	190	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	191	coro_clone_padlist (CV *cv)
160	{	192	{
161	AV *padlist = CvPADLIST (cv);	193	AV *padlist = CvPADLIST (cv);
162	AV newpadlist, newpad;	194	AV newpadlist, newpad;
163		195
164	newpadlist = newAV ();	196	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	197	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	198	#if PERL_VERSION_ATLEAST (5,9,0)
		199	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		200	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	201	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	202	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	203	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	204	--AvFILLp (padlist);
173		205
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	206	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
176		208
177	return newpadlist;	209	return newpadlist;
178	}	210	}
179		211
180	static void	212	static void
181	free_padlist (pTHX_ AV *padlist)	213	free_padlist (AV *padlist)
182	{	214	{
183	/* may be during global destruction */	215	/* may be during global destruction */
184	if (SvREFCNT (padlist))	216	if (SvREFCNT (padlist))
185	{	217	{
186	I32 i = AvFILLp (padlist);	218	I32 i = AvFILLp (padlist);
…		…
207	AV *padlist;	239	AV *padlist;
208	AV av = (AV )mg->mg_obj;	240	AV av = (AV )mg->mg_obj;
209		241
210	/* casting is fun. */	242	/* casting is fun. */
211	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	243	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
212	free_padlist (aTHX_ padlist);	244	free_padlist (padlist);
213		245
214	SvREFCNT_dec (av);	246	SvREFCNT_dec (av);
215		247
216	return 0;	248	return 0;
217	}	249	}
218		250
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	251	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		252
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	253	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		254
		255	#define CORO_MAGIC(cv) \
		256	SvMAGIC (cv) \
		257	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		258	? SvMAGIC (cv) \
		259	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		260	: 0
		261
223	/* the next two functions merely cache the padlists */	262	/* the next two functions merely cache the padlists */
224	static void	263	static void
225	get_padlist (pTHX_ CV *cv)	264	get_padlist (CV *cv)
226	{	265	{
227	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	266	MAGIC *mg = CORO_MAGIC (cv);
		267	AV *av;
228		268
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	271	else
232	{	272	{
233	#if 0	273	#if PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	274	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	275	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	276	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	277	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	278	SvREFCNT_dec (cp);
239	#else	279	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	280	CvPADLIST (cv) = coro_clone_padlist (cv);
241	#endif	281	#endif
242	}	282	}
243	}	283	}
244		284
245	static void	285	static void
246	put_padlist (pTHX_ CV *cv)	286	put_padlist (CV *cv)
247	{	287	{
248	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
249		290
250	if (!mg)	291	if (!mg)
251	{	292	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	295	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	296	mg->mg_obj = (SV *)newAV ();
256	}	297	}
257		298
258	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	299	av = (AV *)mg->mg_obj;
		300
		301	if (AvFILLp (av) >= AvMAX (av))
		302	av_extend (av, AvMAX (av) + 1);
		303
		304	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	305	}
260		306
261	#define SB do {	307	#define SB do {
262	#define SE } while (0)	308	#define SE } while (0)
263		309
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		311
269	static void	312	static void
270	load_state(pTHX_ Coro__State c)	313	load_perl (Coro__State c)
271	{	314	{
272	PL_dowarn = c->dowarn;	315	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	316	# include "state.h"
274		317	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		318
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	319	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	320	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	321	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		322	if (c->irssv)
		323	{
		324	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		325	SvREFCNT_dec (c->irssv);
		326	else
		327	{
		328	REPLACE_SV (PL_rs, c->irssv);
		329	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		330	sv_setsv (c->irssv_sv, PL_rs);
		331	}
		332	}
310		333
311	{	334	{
312	dSP;	335	dSP;
313	CV *cv;	336	CV *cv;
314		337
315	/* now do the ugly restore mess */	338	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	339	while ((cv = (CV *)POPs))
317	{	340	{
318	AV padlist = (AV )POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	342	CvDEPTH (cv) = PTR2IV (POPs);
324	}	343	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	344	}
328		345
329	PUTBACK;	346	PUTBACK;
330	}	347	}
331	}	348	}
332		349
333	static void	350	static void
334	save_state(pTHX_ Coro__State c, int flags)	351	save_perl (Coro__State c)
335	{	352	{
336	{	353	{
337	dSP;	354	dSP;
338	I32 cxix = cxstack_ix;	355	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	356	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	359	/*
343	* the worst thing you can imagine happens first - we have to save	360	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	361	* (and reinitialize) all cv's in the whole callchain :(
345	*/	362	*/
346		363
		364	EXTEND (SP, 3 + 1);
347	PUSHs (Nullsv);	365	PUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	366	/* this loop was inspired by pp_caller */
349	for (;;)	367	for (;;)
350	{	368	{
351	while (cxix >= 0)	369	while (cxix >= 0)
352	{	370	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	371	PERL_CONTEXT *cx = &ccstk[cxix--];
354		372
355	if (CxTYPE(cx) == CXt_SUB)	373	if (CxTYPE (cx) == CXt_SUB)
356	{	374	{
357	CV *cv = cx->blk_sub.cv;	375	CV *cv = cx->blk_sub.cv;
		376
358	if (CvDEPTH(cv))	377	if (CvDEPTH (cv))
359	{	378	{
360	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST (cv));
		381	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	382	PUSHs ((SV *)cv);
371		383
		384	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	385	get_padlist (cv);
373	}	386	}
374	}	387	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	388	}
384		389
385	if (top_si->si_type == PERLSI_MAIN)	390	if (top_si->si_type == PERLSI_MAIN)
386	break;	391	break;
387		392
…		…
391	}	396	}
392		397
393	PUTBACK;	398	PUTBACK;
394	}	399	}
395		400
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	401	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	402	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	403	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		404	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
399		405
400	c->dowarn = PL_dowarn;	406	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	407	# include "state.h"
402		408	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	409	}
435		410
436	/*	411	/*
437	* allocate various perl stacks. This is an exact copy	412	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	413	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	414	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	415	* not usually need a lot of stackspace.
441	*/	416	*/
		417	#if PREFER_PERL_FUNCTIONS
		418	# define coro_init_stacks init_stacks
		419	#else
442	static void	420	static void
443	coro_init_stacks (pTHX)	421	coro_init_stacks ()
444	{	422	{
445	LOCK;
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
448	PL_curstackinfo->si_type = PERLSI_MAIN;	424	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	425	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		427
452	PL_stack_base = AvARRAY(PL_curstack);	428	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	429	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		431
456	New(50,PL_tmps_stack,96,SV*);	432	New(50,PL_tmps_stack,128,SV*);
457	PL_tmps_floor = -1;	433	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	434	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	435	PL_tmps_max = 128;
460		436
461	New(54,PL_markstack,16,I32);	437	New(54,PL_markstack,32,I32);
462	PL_markstack_ptr = PL_markstack;	438	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	439	PL_markstack_max = PL_markstack + 32;
464		440
465	#ifdef SET_MARK_OFFSET	441	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	442	SET_MARK_OFFSET;
467	#endif	443	#endif
468		444
469	New(54,PL_scopestack,16,I32);	445	New(54,PL_scopestack,32,I32);
470	PL_scopestack_ix = 0;	446	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	447	PL_scopestack_max = 32;
472		448
473	New(54,PL_savestack,96,ANY);	449	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	450	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	451	PL_savestack_max = 64;
476		452
477	#if PERL_VERSION < 9	453	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	454	New(54,PL_retstack,16,OP*);
479	PL_retstack_ix = 0;	455	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	456	PL_retstack_max = 16;
481	#endif	457	#endif
482
483	UNLOCK;
484	}	458	}
		459	#endif
485		460
486	/*	461	/*
487	* destroy the stacks, the callchain etc...	462	* destroy the stacks, the callchain etc...
488	*/	463	*/
489	static void	464	static void
490	destroy_stacks(pTHX)	465	coro_destroy_stacks ()
491	{	466	{
492	if (!IN_DESTRUCT)	467	if (!IN_DESTRUCT)
493	{	468	{
494	/* is this ugly, I ask? */	469	/* restore all saved variables and stuff */
495	LEAVE_SCOPE (0);	470	LEAVE_SCOPE (0);
		471	assert (PL_tmps_floor == -1);
496		472
497	/* sure it is, but more important: is it correct?? :/ */	473	/* free all temporaries */
498	FREETMPS;	474	FREETMPS;
		475	assert (PL_tmps_ix == -1);
499		476
500	/POPSTACK_TO (PL_mainstack);//D//use/	477	POPSTACK_TO (PL_mainstack);
501	}	478	}
502		479
503	while (PL_curstackinfo->si_next)	480	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	481	PL_curstackinfo = PL_curstackinfo->si_next;
505		482
506	while (PL_curstackinfo)	483	while (PL_curstackinfo)
507	{	484	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	485	PERL_SI *p = PL_curstackinfo->si_prev;
509		486
510	{ /D//remove/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	487	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/D//remove/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	488	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		489
522	Safefree (PL_curstackinfo->si_cxstack);	490	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	491	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	492	PL_curstackinfo = p;
525	}	493	}
526		494
527	Safefree (PL_tmps_stack);	495	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	496	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	497	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	498	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	499	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	500	Safefree (PL_retstack);
533	#endif	501	#endif
534	}	502	}
535		503
536	static void	504	static void
537	setup_coro (struct coro *coro)	505	setup_coro (struct coro *coro)
538	{	506	{
539	/*	507	/*
540	* emulate part of the perl startup here.	508	* emulate part of the perl startup here.
541	*/	509	*/
542	dTHX;	510
		511	coro_init_stacks ();
		512
		513	PL_curcop = &PL_compiling;
		514	PL_in_eval = EVAL_NULL;
		515	PL_curpm = 0;
		516	PL_localizing = 0;
		517	PL_dirty = 0;
		518	PL_restartop = 0;
		519
		520	{
		521	dSP;
		522	LOGOP myop;
		523
		524	SvREFCNT_dec (GvAV (PL_defgv));
		525	GvAV (PL_defgv) = coro->args; coro->args = 0;
		526
		527	Zero (&myop, 1, LOGOP);
		528	myop.op_next = Nullop;
		529	myop.op_flags = OPf_WANT_VOID;
		530
		531	PUSHMARK (SP);
		532	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		533	PUTBACK;
		534	PL_op = (OP *)&myop;
		535	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		536	SPAGAIN;
		537	}
		538
		539	ENTER; /* necessary e.g. for dounwind */
		540	}
		541
		542	static void
		543	free_coro_mortal ()
		544	{
		545	if (coro_mortal)
		546	{
		547	SvREFCNT_dec (coro_mortal);
		548	coro_mortal = 0;
		549	}
		550	}
		551
		552	/* inject a fake call to Coro::State::_cctx_init into the execution */
		553	static void NOINLINE
		554	prepare_cctx (coro_cctx *cctx)
		555	{
543	dSP;	556	dSP;
544	UNOP myop;	557	LOGOP myop;
545	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
546		558
547	coro_init_stacks (aTHX);
548	/PL_curcop = 0;/
549	/PL_in_eval = PL_in_eval;/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552
553	SPAGAIN;
554
555	Zero (&myop, 1, UNOP);	559	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	560	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	561	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
558		562
		563	PUSHMARK (SP);
		564	EXTEND (SP, 2);
		565	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		566	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		567	PUTBACK;
559	PL_op = (OP *)&myop;	568	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	569	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	570	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	571	}
569		572
570	static void	573	static void
571	transfer_tail ()	574	coro_run (void *arg)
572	{	575	{
573	if (coro_mortal)	576	/* coro_run is the alternative tail of transfer(), so unlock here. */
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578
579	UNLOCK;	577	UNLOCK;
580	}
581		578
582	static void
583	coro_run (void *arg)
584	{
585	/*	579	/*
586	* this is a _very_ stripped down perl interpreter ;)	580	* this is a _very_ stripped down perl interpreter ;)
587	*/	581	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	582	PL_top_env = &PL_start_env;
593	PL_restartop = PL_op->op_next;	583
		584	/* inject call to cctx_init */
		585	prepare_cctx ((coro_cctx *)arg);
		586
594	/* somebody will hit me for both perl_run and PL_restart_top */	587	/* somebody will hit me for both perl_run and PL_restartop */
595	perl_run (aTHX_ PERL_GET_CONTEXT);	588	PL_restartop = PL_op;
		589	perl_run (PL_curinterp);
596		590
		591	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
597	abort ();	592	abort ();
598	}	593	}
599		594
600	static coro_stack *	595	static coro_cctx *
601	stack_new ()	596	cctx_new ()
602	{	597	{
603	coro_stack *stack;	598	coro_cctx *cctx;
604		599
		600	++cctx_count;
		601
605	New (0, stack, 1, coro_stack);	602	Newz (0, cctx, 1, coro_cctx);
606		603
607	#if HAVE_MMAP	604	#if HAVE_MMAP
608		605
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	606	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		607	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	608	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
611		609
612	if (stack->sptr == (void *)-1)	610	if (cctx->sptr == (void *)-1)
613	{	611	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	612	perror ("FATAL: unable to mmap stack for coroutine");
615	_exit (EXIT_FAILURE);	613	_exit (EXIT_FAILURE);
616	}	614	}
617		615
		616	# if STACKGUARD
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	617	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		618	# endif
619		619
620	#else	620	#else
621		621
622	stack->ssize = STACKSIZE * (long)sizeof (long);	622	cctx->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);	623	New (0, cctx->sptr, STACKSIZE, long);
624		624
625	if (!stack->sptr)	625	if (!cctx->sptr)
626	{	626	{
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");	627	perror ("FATAL: unable to malloc stack for coroutine");
628	_exit (EXIT_FAILURE);	628	_exit (EXIT_FAILURE);
629	}	629	}
630		630
631	#endif	631	#endif
632		632
		633	#if USE_VALGRIND
		634	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		635	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		636	cctx->ssize + (char *)cctx->sptr
		637	);
		638	#endif
		639
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	640	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
634		641
635	return stack;	642	return cctx;
636	}	643	}
637		644
638	static void	645	static void
639	stack_free (coro_stack *stack)	646	cctx_destroy (coro_cctx *cctx)
640	{	647	{
641	if (!stack \|\| stack == main_stack)	648	if (!cctx)
642	return;	649	return;
643		650
		651	--cctx_count;
		652
		653	#if USE_VALGRIND
		654	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		655	#endif
		656
644	#if HAVE_MMAP	657	#if HAVE_MMAP
645	munmap (stack->sptr, stack->ssize);	658	munmap (cctx->sptr, cctx->ssize);
646	#else	659	#else
647	Safefree (stack->sptr);	660	Safefree (cctx->sptr);
648	#endif	661	#endif
649		662
650	Safefree (stack);	663	Safefree (cctx);
651	}	664	}
652		665
653	static coro_stack *stack_first;	666	static coro_cctx *
654		667	cctx_get ()
655	static void
656	stack_get (struct coro *coro)
657	{	668	{
		669	coro_cctx *cctx;
		670
658	if (stack_first)	671	if (cctx_first)
659	{	672	{
660	coro->stack = stack_first;	673	cctx = cctx_first;
661	stack_first = stack_first->next;	674	cctx_first = cctx->next;
		675	--cctx_idle;
662	}	676	}
663	else	677	else
664	coro->stack = stack_new ();	678	{
665	}	679	cctx = cctx_new ();
		680	PL_op = PL_op->op_next;
		681	}
666		682
		683	return cctx;
		684	}
		685
667	static void	686	static void
668	stack_put (coro_stack *stack)	687	cctx_put (coro_cctx *cctx)
669	{	688	{
670	stack->next = stack_first;	689	/* free another cctx if overlimit */
671	stack_first = stack;	690	if (cctx_idle >= MAX_IDLE_CCTX)
		691	{
		692	coro_cctx *first = cctx_first;
		693	cctx_first = first->next;
		694	--cctx_idle;
		695
		696	assert (!first->inuse);
		697	cctx_destroy (first);
		698	}
		699
		700	++cctx_idle;
		701	cctx->next = cctx_first;
		702	cctx_first = cctx;
672	}	703	}
673		704
674	/* never call directly, always through the coro_state_transfer global variable */	705	/* never call directly, always through the coro_state_transfer global variable */
675	static void	706	static void NOINLINE
676	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	707	transfer (struct coro prev, struct coro next)
677	{	708	{
678	dSTACKLEVEL;	709	dSTACKLEVEL;
679		710
680	/* sometimes transfer is only called to set idle_sp */	711	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	712	if (!next)
682	prev->stack->idle_sp = stacklevel;	713	{
683		714	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	715	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
685		716	}
686	if (prev != next)	717	else if (prev != next)
687	{	718	{
688	coro_stack *prev_stack = prev->stack;	719	coro_cctx *prev__cctx;
689		720
690	/* possibly "free" the stack */	721	if (prev->flags & CF_NEW)
691	if (prev_stack->idle_sp == stacklevel)
692	{	722	{
693	stack_put (prev_stack);	723	/* create a new empty context */
694	prev->stack = 0;	724	Newz (0, prev->cctx, 1, coro_cctx);
		725	prev->cctx->inuse = 1;
		726	prev->flags &= ~CF_NEW;
		727	prev->flags \|= CF_RUNNING;
695	}	728	}
696		729
697	if (!next->mainstack)	730	/TODO: must not croak here /
		731	if (!prev->flags & CF_RUNNING)
		732	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		733
		734	if (next->flags & CF_RUNNING)
		735	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		736
		737	if (next->flags & CF_DESTROYED)
		738	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		739
		740	prev->flags &= ~CF_RUNNING;
		741	next->flags \|= CF_RUNNING;
		742
		743	LOCK;
		744
		745	if (next->flags & CF_NEW)
698	{	746	{
		747	/* need to start coroutine */
		748	next->flags &= ~CF_NEW;
699	/* first get rid of the old state */	749	/* first get rid of the old state */
700	SAVE (prev, -1);	750	save_perl (prev);
701	/* setup coroutine call */	751	/* setup coroutine call */
702	setup_coro (next);	752	setup_coro (next);
703	next->stack = 0;	753	/* need a new stack */
		754	assert (!next->cctx);
704	}	755	}
705	else	756	else
706	{	757	{
707	SAVE (prev, flags);	758	/* coroutine already started */
708	LOAD (next);	759	save_perl (prev);
		760	load_perl (next);
709	}	761	}
710		762
		763	prev__cctx = prev->cctx;
		764
		765	/* possibly "free" the cctx */
		766	if (prev__cctx->idle_sp == STACKLEVEL)
		767	{
		768	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		769	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		770
		771	prev->cctx = 0;
		772
		773	cctx_put (prev__cctx);
		774	prev__cctx->inuse = 0;
		775	}
		776
711	if (!next->stack)	777	if (!next->cctx)
712	stack_get (next);	778	{
		779	next->cctx = cctx_get ();
		780	assert (!next->cctx->inuse);
		781	next->cctx->inuse = 1;
		782	}
713		783
714	if (prev_stack != next->stack)	784	if (prev__cctx != next->cctx)
		785	{
		786	prev__cctx->top_env = PL_top_env;
		787	PL_top_env = next->cctx->top_env;
715	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	788	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
716	}	789	}
717		790
718	transfer_tail ();	791	free_coro_mortal ();
		792	UNLOCK;
		793	}
719	}	794	}
720		795
721	/* use this function pointer to call the above function */	796	struct transfer_args
722	/* this is done to increase chances of the compiler not inlining the call */	797	{
723	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	798	struct coro prev, next;
		799	};
724		800
		801	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		802
725	static void	803	static int
726	coro_state_destroy (struct coro *coro)	804	coro_state_destroy (struct coro *coro)
727	{	805	{
728	if (coro->refcnt--)	806	if (coro->refcnt--)
729	return;	807	return 0;
		808
		809	if (coro->flags & CF_DESTROYED)
		810	return 0;
		811
		812	coro->flags \|= CF_DESTROYED;
730		813
731	if (coro->mainstack && coro->mainstack != main_mainstack)	814	if (coro->mainstack && coro->mainstack != main_mainstack)
732	{	815	{
		816	assert (!(coro->flags & CF_RUNNING));
		817
733	struct coro temp;	818	struct coro temp;
		819	Zero (&temp, 1, struct coro);
		820	temp.save = CORO_SAVE_ALL;
734		821
735	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	822	if (coro->flags & CF_RUNNING)
736	LOAD (aTHX_ coro);	823	croak ("FATAL: tried to destroy currently running coroutine");
737		824
		825	save_perl (&temp);
		826	load_perl (coro);
		827
738	destroy_stacks (aTHX);	828	coro_destroy_stacks ();
739		829
740	LOAD ((&temp)); /* this will get rid of defsv etc.. */	830	load_perl (&temp); /* this will get rid of defsv etc.. */
741		831
742	coro->mainstack = 0;	832	coro->mainstack = 0;
743	}	833	}
744		834
745	stack_free (coro->stack);	835	cctx_destroy (coro->cctx);
746	SvREFCNT_dec (coro->args);	836	SvREFCNT_dec (coro->args);
747	Safefree (coro);	837
		838	return 1;
748	}	839	}
749		840
750	static int	841	static int
751	coro_state_clear (SV sv, MAGIC mg)	842	coro_state_clear (pTHX_ SV sv, MAGIC mg)
752	{	843	{
753	struct coro coro = (struct coro )mg->mg_ptr;	844	struct coro coro = (struct coro )mg->mg_ptr;
754	mg->mg_ptr = 0;	845	mg->mg_ptr = 0;
755		846
756	coro_state_destroy (coro);	847	coro_state_destroy (coro);
757		848
		849	if (!coro->refcnt)
		850	Safefree (coro);
		851
758	return 0;	852	return 0;
759	}	853	}
760		854
761	static int	855	static int
762	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	856	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
763	{	857	{
764	struct coro coro = (struct coro )mg->mg_ptr;	858	struct coro coro = (struct coro )mg->mg_ptr;
765		859
766	++coro->refcnt;	860	++coro->refcnt;
767		861
768	return 0;	862	return 0;
769	}	863	}
770		864
771	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	865	static MGVTBL coro_state_vtbl = {
		866	0, 0, 0, 0,
		867	coro_state_clear,
		868	0,
		869	#ifdef MGf_DUP
		870	coro_state_dup,
		871	#else
		872	# define MGf_DUP 0
		873	#endif
		874	};
772		875
773	static struct coro *	876	static struct coro *
774	SvSTATE (SV *coro)	877	SvSTATE (SV *coro)
775	{	878	{
776	HV *stash;	879	HV *stash;
…		…
791	assert (mg->mg_type == PERL_MAGIC_ext);	894	assert (mg->mg_type == PERL_MAGIC_ext);
792	return (struct coro *)mg->mg_ptr;	895	return (struct coro *)mg->mg_ptr;
793	}	896	}
794		897
795	static void	898	static void
		899	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
		900	{
		901	ta->prev = SvSTATE (prev_sv);
		902	ta->next = SvSTATE (next_sv);
		903	}
		904
		905	static void
796	api_transfer (pTHX_ SV prev, SV next, int flags)	906	api_transfer (SV prev_sv, SV next_sv)
797	{	907	{
798	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	908	struct transfer_args ta;
		909
		910	prepare_transfer (&ta, prev_sv, next_sv);
		911	TRANSFER (ta);
		912	}
		913
		914	static int
		915	api_save (SV *coro_sv, int new_save)
		916	{
		917	struct coro *coro = SvSTATE (coro_sv);
		918	int old_save = coro->save;
		919
		920	if (new_save >= 0)
		921	coro->save = new_save;
		922
		923	return old_save;
799	}	924	}
800		925
801	/ Coro ******************************************************************/	926	/ Coro ******************************************************************/
802		927
803	#define PRIO_MAX 3	928	#define PRIO_MAX 3
…		…
806	#define PRIO_LOW -1	931	#define PRIO_LOW -1
807	#define PRIO_IDLE -3	932	#define PRIO_IDLE -3
808	#define PRIO_MIN -4	933	#define PRIO_MIN -4
809		934
810	/* for Coro.pm */	935	/* for Coro.pm */
811	static GV coro_current, coro_idle;	936	static SV *coro_current;
812	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	937	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;	938	static int coro_nready;
814		939
815	static void	940	static void
816	coro_enq (pTHX_ SV *sv)	941	coro_enq (SV *coro_sv)
817	{	942	{
818	int prio;
819
820	if (SvTYPE (sv) != SVt_PVHV)
821	croak ("Coro::ready tried to enqueue something that is not a coroutine");
822
823	prio = SvSTATE (sv)->prio;
824
825	av_push (coro_ready [prio - PRIO_MIN], sv);	943	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
826	coro_nready++;	944	coro_nready++;
827	}	945	}
828		946
829	static SV *	947	static SV *
830	coro_deq (pTHX_ int min_prio)	948	coro_deq (int min_prio)
831	{	949	{
832	int prio = PRIO_MAX - PRIO_MIN;	950	int prio = PRIO_MAX - PRIO_MIN;
833		951
834	min_prio -= PRIO_MIN;	952	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	953	if (min_prio < 0)
…		…
843	}	961	}
844		962
845	return 0;	963	return 0;
846	}	964	}
847		965
848	static void	966	static int
849	api_ready (SV *coro)	967	api_ready (SV *coro_sv)
850	{	968	{
851	dTHX;	969	struct coro *coro;
852		970
853	if (SvROK (coro))	971	if (SvROK (coro_sv))
854	coro = SvRV (coro);	972	coro_sv = SvRV (coro_sv);
		973
		974	coro = SvSTATE (coro_sv);
		975
		976	if (coro->flags & CF_READY)
		977	return 0;
		978
		979	coro->flags \|= CF_READY;
855		980
856	LOCK;	981	LOCK;
857	coro_enq (aTHX_ SvREFCNT_inc (coro));	982	coro_enq (SvREFCNT_inc (coro_sv));
858	UNLOCK;	983	UNLOCK;
		984
		985	return 1;
		986	}
		987
		988	static int
		989	api_is_ready (SV *coro_sv)
		990	{
		991	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		992	}
		993
		994	static void
		995	prepare_schedule (struct transfer_args *ta)
		996	{
		997	SV prev_sv, next_sv;
		998
		999	for (;;)
		1000	{
		1001	LOCK;
		1002	next_sv = coro_deq (PRIO_MIN);
		1003	UNLOCK;
		1004
		1005	/* nothing to schedule: call the idle handler */
		1006	if (!next_sv)
		1007	{
		1008	dSP;
		1009
		1010	ENTER;
		1011	SAVETMPS;
		1012
		1013	PUSHMARK (SP);
		1014	PUTBACK;
		1015	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1016
		1017	FREETMPS;
		1018	LEAVE;
		1019	continue;
		1020	}
		1021
		1022	ta->next = SvSTATE (next_sv);
		1023
		1024	/* cannot transfer to destroyed coros, skip and look for next */
		1025	if (ta->next->flags & CF_DESTROYED)
		1026	{
		1027	SvREFCNT_dec (next_sv);
		1028	continue;
		1029	}
		1030
		1031	break;
		1032	}
		1033
		1034	/* free this only after the transfer */
		1035	prev_sv = SvRV (coro_current);
		1036	SvRV_set (coro_current, next_sv);
		1037	ta->prev = SvSTATE (prev_sv);
		1038
		1039	assert (ta->next->flags & CF_READY);
		1040	ta->next->flags &= ~CF_READY;
		1041
		1042	LOCK;
		1043	free_coro_mortal ();
		1044	coro_mortal = prev_sv;
		1045	UNLOCK;
		1046	}
		1047
		1048	static void
		1049	prepare_cede (struct transfer_args *ta)
		1050	{
		1051	api_ready (coro_current);
		1052	prepare_schedule (ta);
		1053	}
		1054
		1055	static int
		1056	prepare_cede_notself (struct transfer_args *ta)
		1057	{
		1058	if (coro_nready)
		1059	{
		1060	SV *prev = SvRV (coro_current);
		1061	prepare_schedule (ta);
		1062	api_ready (prev);
		1063	return 1;
		1064	}
		1065	else
		1066	return 0;
859	}	1067	}
860		1068
861	static void	1069	static void
862	api_schedule (void)	1070	api_schedule (void)
863	{	1071	{
864	dTHX;	1072	struct transfer_args ta;
865		1073
866	SV prev, next;	1074	prepare_schedule (&ta);
867	SV *current = GvSV (coro_current);	1075	TRANSFER (ta);
868
869	for (;;)
870	{
871	LOCK;
872
873	next = coro_deq (aTHX_ PRIO_MIN);
874
875	if (next)
876	break;
877
878	UNLOCK;
879
880	{
881	dSP;
882
883	ENTER;
884	SAVETMPS;
885
886	PUSHMARK (SP);
887	PUTBACK;
888	call_sv (GvSV (coro_idle), G_DISCARD);
889
890	FREETMPS;
891	LEAVE;
892	}
893	}
894
895	prev = SvRV (current);
896	SvRV (current) = next;
897
898	/* free this only after the transfer */
899	coro_mortal = prev;
900
901	UNLOCK;
902
903	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
904	}	1076	}
905		1077
906	static int coro_cede_self;
907
908	static void	1078	static int
909	api_cede (void)	1079	api_cede (void)
910	{	1080	{
911	dTHX;	1081	struct transfer_args ta;
912	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));
913		1082
914	LOCK;	1083	prepare_cede (&ta);
915		1084
916	if (coro_cede_self)	1085	if (ta.prev != ta.next)
917	{	1086	{
918	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];	1087	TRANSFER (ta);
919	av_unshift (runqueue, 1);	1088	return 1;
920	av_store (runqueue, 0, current);
921	coro_nready++;
922	coro_cede_self = 0;
923	}	1089	}
924	else	1090	else
925	coro_enq (aTHX_ current);	1091	return 0;
		1092	}
926		1093
927	UNLOCK;	1094	static int
		1095	api_cede_notself (void)
		1096	{
		1097	struct transfer_args ta;
928		1098
929	api_schedule ();	1099	if (prepare_cede_notself (&ta))
		1100	{
		1101	TRANSFER (ta);
		1102	return 1;
		1103	}
		1104	else
		1105	return 0;
930	}	1106	}
931		1107
932	MODULE = Coro::State PACKAGE = Coro::State	1108	MODULE = Coro::State PACKAGE = Coro::State
933		1109
934	PROTOTYPES: DISABLE	1110	PROTOTYPES: DISABLE
…		…
940	#endif	1116	#endif
941	BOOT_PAGESIZE;	1117	BOOT_PAGESIZE;
942		1118
943	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1119	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
944		1120
945	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1121	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
946	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1122	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
947	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1123	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1124	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1125	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
948		1126
949	main_mainstack = PL_mainstack;	1127	main_mainstack = PL_mainstack;
950		1128
951	coroapi.ver = CORO_API_VERSION;	1129	coroapi.ver = CORO_API_VERSION;
952	coroapi.transfer = api_transfer;	1130	coroapi.transfer = api_transfer;
953
954	Newz (0, main_stack, 1, coro_stack);
955	main_stack->idle_sp = (void *)-1;
956		1131
957	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1132	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
958	}	1133	}
959		1134
960	SV *	1135	SV *
…		…
965	HV *hv;	1140	HV *hv;
966	int i;	1141	int i;
967		1142
968	Newz (0, coro, 1, struct coro);	1143	Newz (0, coro, 1, struct coro);
969	coro->args = newAV ();	1144	coro->args = newAV ();
		1145	coro->save = CORO_SAVE_ALL;
		1146	coro->flags = CF_NEW;
970		1147
971	hv = newHV ();	1148	hv = newHV ();
972	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1149	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
973	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1150	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
974		1151
975	av_push (coro->args, newSVsv (RETVAL));
976	for (i = 1; i < items; i++)	1152	for (i = 1; i < items; i++)
977	av_push (coro->args, newSVsv (ST (i)));	1153	av_push (coro->args, newSVsv (ST (i)));
978
979	coro->stack = main_stack;
980	/coro->mainstack = 0; //actual work is done inside transfer /
981	/coro->stack = 0;/
982	}	1154	}
983	OUTPUT:	1155	OUTPUT:
984	RETVAL	1156	RETVAL
985		1157
		1158	int
		1159	save (SV *coro, int new_save = -1)
		1160	CODE:
		1161	RETVAL = api_save (coro, new_save);
		1162	OUTPUT:
		1163	RETVAL
		1164
986	void	1165	void
987	transfer (prev, next, flags)	1166	_set_stacklevel (...)
988	SV *prev	1167	ALIAS:
989	SV *next	1168	Coro::State::transfer = 1
990	int flags	1169	Coro::schedule = 2
		1170	Coro::cede = 3
		1171	Coro::cede_notself = 4
991	CODE:	1172	CODE:
992	PUTBACK;
993	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
994	SPAGAIN;
995
996	int
997	prio (Coro::State coro, int newprio = 0)
998	ALIAS:
999	nice = 1
1000	CODE:
1001	{	1173	{
1002	RETVAL = coro->prio;	1174	struct transfer_args ta;
1003		1175
1004	if (items > 1)	1176	switch (ix)
1005	{	1177	{
		1178	case 0:
		1179	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1180	ta.next = 0;
		1181	break;
		1182
		1183	case 1:
1006	if (ix)	1184	if (items != 2)
1007	newprio += coro->prio;	1185	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1008		1186
1009	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1187	prepare_transfer (&ta, ST (0), ST (1));
1010	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1188	break;
1011		1189
1012	coro->prio = newprio;	1190	case 2:
		1191	prepare_schedule (&ta);
		1192	break;
		1193
		1194	case 3:
		1195	prepare_cede (&ta);
		1196	break;
		1197
		1198	case 4:
		1199	if (!prepare_cede_notself (&ta))
		1200	XSRETURN_EMPTY;
		1201
		1202	break;
1013	}	1203	}
1014	}
1015		1204
1016	void	1205	BARRIER;
1017	_clear_idle_sp (Coro::State self)	1206	TRANSFER (ta);
		1207	}
		1208
		1209	bool
		1210	_destroy (SV *coro_sv)
1018	CODE:	1211	CODE:
1019	self->stack->idle_sp = 0;	1212	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1020		1213	OUTPUT:
1021	void	1214	RETVAL
1022	_clone_state_from (SV dst, SV src)
1023	CODE:
1024	{
1025	struct coro *coro_src = SvSTATE (src);
1026
1027	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028
1029	++coro_src->refcnt;
1030	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1031	}
1032		1215
1033	void	1216	void
1034	_exit (code)	1217	_exit (code)
1035	int code	1218	int code
1036	PROTOTYPE: $	1219	PROTOTYPE: $
1037	CODE:	1220	CODE:
1038	_exit (code);	1221	_exit (code);
1039		1222
1040	MODULE = Coro::State PACKAGE = Coro::Cont	1223	int
		1224	cctx_count ()
		1225	CODE:
		1226	RETVAL = cctx_count;
		1227	OUTPUT:
		1228	RETVAL
1041		1229
1042	void	1230	int
1043	yield (...)	1231	cctx_idle ()
1044	PROTOTYPE: @	1232	CODE:
1045	CODE:	1233	RETVAL = cctx_idle;
1046	{	1234	OUTPUT:
1047	SV *yieldstack;	1235	RETVAL
1048	SV *sv;
1049	AV *defav = GvAV (PL_defgv);
1050	struct coro prev, next;
1051
1052	yieldstack = *hv_fetch (
1053	(HV *)SvRV (GvSV (coro_current)),
1054	"yieldstack", sizeof ("yieldstack") - 1,
1055	0
1056	);
1057
1058	/* set up @_ -- ugly */
1059	av_clear (defav);
1060	av_fill (defav, items - 1);
1061	while (items--)
1062	av_store (defav, items, SvREFCNT_inc (ST(items)));
1063
1064	sv = av_pop ((AV *)SvRV (yieldstack));
1065	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1066	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1067	SvREFCNT_dec (sv);
1068
1069	coro_state_transfer (aTHX_ prev, next, 0);
1070	}
1071		1236
1072	MODULE = Coro::State PACKAGE = Coro	1237	MODULE = Coro::State PACKAGE = Coro
1073		1238
1074	BOOT:	1239	BOOT:
1075	{	1240	{
…		…
1082	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1247	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1248	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1249	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1250	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086		1251
1087	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1252	coro_current = get_sv ("Coro::current", FALSE);
1088	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1253	SvREADONLY_on (coro_current);
1089		1254
1090	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1255	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091	coro_ready[i] = newAV ();	1256	coro_ready[i] = newAV ();
1092		1257
1093	{	1258	{
1094	SV *sv = perl_get_sv("Coro::API", 1);	1259	SV *sv = perl_get_sv("Coro::API", 1);
1095		1260
1096	coroapi.schedule = api_schedule;	1261	coroapi.schedule = api_schedule;
		1262	coroapi.save = api_save;
1097	coroapi.cede = api_cede;	1263	coroapi.cede = api_cede;
		1264	coroapi.cede_notself = api_cede_notself;
1098	coroapi.ready = api_ready;	1265	coroapi.ready = api_ready;
		1266	coroapi.is_ready = api_is_ready;
1099	coroapi.nready = &coro_nready;	1267	coroapi.nready = &coro_nready;
1100	coroapi.current = coro_current;	1268	coroapi.current = coro_current;
1101		1269
1102	GCoroAPI = &coroapi;	1270	GCoroAPI = &coroapi;
1103	sv_setiv (sv, (IV)&coroapi);	1271	sv_setiv (sv, (IV)&coroapi);
1104	SvREADONLY_on (sv);	1272	SvREADONLY_on (sv);
1105	}	1273	}
1106	}	1274	}
1107		1275
1108	void	1276	void
		1277	_set_current (SV *current)
		1278	PROTOTYPE: $
		1279	CODE:
		1280	SvREFCNT_dec (SvRV (coro_current));
		1281	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1282
		1283	int
		1284	prio (Coro::State coro, int newprio = 0)
		1285	ALIAS:
		1286	nice = 1
		1287	CODE:
		1288	{
		1289	RETVAL = coro->prio;
		1290
		1291	if (items > 1)
		1292	{
		1293	if (ix)
		1294	newprio = coro->prio - newprio;
		1295
		1296	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1297	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1298
		1299	coro->prio = newprio;
		1300	}
		1301	}
		1302	OUTPUT:
		1303	RETVAL
		1304
		1305	SV *
1109	ready (SV *self)	1306	ready (SV *self)
1110	PROTOTYPE: $	1307	PROTOTYPE: $
1111	CODE:	1308	CODE:
1112	api_ready (self);	1309	RETVAL = boolSV (api_ready (self));
		1310	OUTPUT:
		1311	RETVAL
		1312
		1313	SV *
		1314	is_ready (SV *self)
		1315	PROTOTYPE: $
		1316	CODE:
		1317	RETVAL = boolSV (api_is_ready (self));
		1318	OUTPUT:
		1319	RETVAL
1113		1320
1114	int	1321	int
1115	nready (...)	1322	nready (...)
1116	PROTOTYPE:	1323	PROTOTYPE:
1117	CODE:	1324	CODE:
1118	RETVAL = coro_nready;	1325	RETVAL = coro_nready;
1119	OUTPUT:	1326	OUTPUT:
1120	RETVAL	1327	RETVAL
1121		1328
1122	void
1123	schedule (...)
1124	PROTOTYPE:
1125	CODE:
1126	api_schedule ();
1127
1128	void
1129	_set_cede_self ()
1130	CODE:
1131	coro_cede_self = 1;
1132
1133	void
1134	cede (...)
1135	PROTOTYPE:
1136	CODE:
1137	api_cede ();
1138
1139	MODULE = Coro::State PACKAGE = Coro::AIO	1329	MODULE = Coro::State PACKAGE = Coro::AIO
1140		1330
1141	SV *	1331	SV *
1142	_get_state ()	1332	_get_state ()
1143	CODE:	1333	CODE:
1144	{	1334	{
1145	struct {	1335	struct io_state *data;
1146	int errorno;
1147	int laststype;
1148	int laststatval;
1149	Stat_t statcache;
1150	} data;
1151		1336
		1337	RETVAL = newSV (sizeof (struct io_state));
		1338	data = (struct io_state *)SvPVX (RETVAL);
		1339	SvCUR_set (RETVAL, sizeof (struct io_state));
		1340	SvPOK_only (RETVAL);
		1341
1152	data.errorno = errno;	1342	data->errorno = errno;
1153	data.laststype = PL_laststype;	1343	data->laststype = PL_laststype;
1154	data.laststatval = PL_laststatval;	1344	data->laststatval = PL_laststatval;
1155	data.statcache = PL_statcache;	1345	data->statcache = PL_statcache;
1156
1157	RETVAL = newSVpvn ((char *)&data, sizeof data);
1158	}	1346	}
1159	OUTPUT:	1347	OUTPUT:
1160	RETVAL	1348	RETVAL
1161		1349
1162	void	1350	void
1163	_set_state (char *data_)	1351	_set_state (char *data_)
1164	PROTOTYPE: $	1352	PROTOTYPE: $
1165	CODE:	1353	CODE:
1166	{	1354	{
1167	struct {	1355	struct io_state data = (void )data_;
1168	int errorno;
1169	int laststype;
1170	int laststatval;
1171	Stat_t statcache;
1172	} data = (void )data_;
1173		1356
1174	errno = data->errorno;	1357	errno = data->errorno;
1175	PL_laststype = data->laststype;	1358	PL_laststype = data->laststype;
1176	PL_laststatval = data->laststatval;	1359	PL_laststatval = data->laststatval;
1177	PL_statcache = data->statcache;	1360	PL_statcache = data->statcache;
1178	}	1361	}
		1362

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Comparing Coro/Coro/State.xs (file contents): Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs. Revision 1.133 by root, Thu Jan 4 20:14:19 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs.
Revision 1.133 by root, Thu Jan 4 20:14:19 2007 UTC