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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.131 by root, Fri Dec 29 11:37:49 2006 UTC vs.
Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC

…		…
1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
31	#else	33	#else
32	# define PAGESIZE 0	34	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
34	#endif	36	#endif
35		37
36	#if USE_VALGRIND	38	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
38	#endif	43	#endif
39		44
40	/* the maximum number of idle cctx that will be pooled */	45	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	46	#define MAX_IDLE_CCTX 8
42		47
…		…
71	#ifndef SvRV_set	76	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	77	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	78	#endif
74		79
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	81	# undef CORO_STACKGUARD
77	#endif	82	#endif
78		83
79	#ifndef STACKGUARD	84	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	85	# define CORO_STACKGUARD 0
81	#endif	86	#endif
82		87
83	/* prefer perl internal functions over our own? */	88	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	90	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	91	#endif
87		92
88	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
89	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
90	* and should be unique. */	95	* and should be unique. */
…		…
112	#else	117	#else
113	# define LOCK (void)0	118	# define LOCK (void)0
114	# define UNLOCK (void)0	119	# define UNLOCK (void)0
115	#endif	120	#endif
116		121
		122	/* helper storage struct for Coro::AIO */
117	struct io_state	123	struct io_state
118	{	124	{
119	int errorno;	125	int errorno;
120	I32 laststype;	126	I32 laststype;
121	int laststatval;	127	int laststatval;
122	Stat_t statcache;	128	Stat_t statcache;
123	};	129	};
124		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
125	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
126	static AV main_mainstack; / used to differentiate between $main and others */	133	static AV main_mainstack; / used to differentiate between $main and others */
127	static HV coro_state_stash, coro_stash;	134	static HV coro_state_stash, coro_stash;
128	static SV coro_mortal; / will be freed after next transfer */	135	static SV coro_mortal; / will be freed after next transfer */
129		136
…		…
134	typedef struct coro_cctx {	141	typedef struct coro_cctx {
135	struct coro_cctx *next;	142	struct coro_cctx *next;
136		143
137	/* the stack */	144	/* the stack */
138	void *sptr;	145	void *sptr;
139	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
140		147
141	/* cpu state */	148	/* cpu state */
142	void idle_sp; / sp of top-level transfer/schedule/cede call */	149	void idle_sp; / sp of top-level transfer/schedule/cede call */
		150	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
143	JMPENV *top_env;	151	JMPENV *top_env;
144	coro_context cctx;	152	coro_context cctx;
145		153
146	int inuse;
147
148	#if USE_VALGRIND	154	#if CORO_USE_VALGRIND
149	int valgrind_id;	155	int valgrind_id;
150	#endif	156	#endif
		157	char inuse, mapped;
151	} coro_cctx;	158	} coro_cctx;
152		159
153	enum {	160	enum {
154	CF_RUNNING = 0x0001, /* coroutine is running */	161	CF_RUNNING = 0x0001, /* coroutine is running */
155	CF_READY = 0x0002, /* coroutine is ready */	162	CF_READY = 0x0002, /* coroutine is ready */
156	CF_NEW = 0x0004, /* ahs never been switched to */	163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
157	};	165	};
158		166
159	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
160	struct coro {	168	struct coro {
161	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
…		…
183	};	191	};
184		192
185	typedef struct coro *Coro__State;	193	typedef struct coro *Coro__State;
186	typedef struct coro *Coro__State_or_hashref;	194	typedef struct coro *Coro__State_or_hashref;
187		195
		196	/ Coro ******************************************************************/
		197
		198	#define PRIO_MAX 3
		199	#define PRIO_HIGH 1
		200	#define PRIO_NORMAL 0
		201	#define PRIO_LOW -1
		202	#define PRIO_IDLE -3
		203	#define PRIO_MIN -4
		204
		205	/* for Coro.pm */
		206	static SV *coro_current;
		207	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		208	static int coro_nready;
		209
		210	/ lowlevel stuff ********************************************************/
		211
188	static AV *	212	static AV *
189	coro_clone_padlist (CV *cv)	213	coro_clone_padlist (pTHX_ CV *cv)
190	{	214	{
191	AV *padlist = CvPADLIST (cv);	215	AV *padlist = CvPADLIST (cv);
192	AV newpadlist, newpad;	216	AV newpadlist, newpad;
193		217
194	newpadlist = newAV ();	218	newpadlist = newAV ();
…		…
206		230
207	return newpadlist;	231	return newpadlist;
208	}	232	}
209		233
210	static void	234	static void
211	free_padlist (AV *padlist)	235	free_padlist (pTHX_ AV *padlist)
212	{	236	{
213	/* may be during global destruction */	237	/* may be during global destruction */
214	if (SvREFCNT (padlist))	238	if (SvREFCNT (padlist))
215	{	239	{
216	I32 i = AvFILLp (padlist);	240	I32 i = AvFILLp (padlist);
…		…
237	AV *padlist;	261	AV *padlist;
238	AV av = (AV )mg->mg_obj;	262	AV av = (AV )mg->mg_obj;
239		263
240	/* casting is fun. */	264	/* casting is fun. */
241	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	265	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
242	free_padlist (padlist);	266	free_padlist (aTHX_ padlist);
243		267
244	SvREFCNT_dec (av);	268	SvREFCNT_dec (av);
245		269
246	return 0;	270	return 0;
247	}	271	}
…		…
257	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	281	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
258	: 0	282	: 0
259		283
260	/* the next two functions merely cache the padlists */	284	/* the next two functions merely cache the padlists */
261	static void	285	static void
262	get_padlist (CV *cv)	286	get_padlist (pTHX_ CV *cv)
263	{	287	{
264	MAGIC *mg = CORO_MAGIC (cv);	288	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	289	AV *av;
266		290
267	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
268	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
269	else	293	else
270	{	294	{
271	#if PREFER_PERL_FUNCTIONS	295	#if CORO_PREFER_PERL_FUNCTIONS
272	/* this is probably cleaner, but also slower? */	296	/* this is probably cleaner, but also slower? */
273	CV *cp = Perl_cv_clone (cv);	297	CV *cp = Perl_cv_clone (cv);
274	CvPADLIST (cv) = CvPADLIST (cp);	298	CvPADLIST (cv) = CvPADLIST (cp);
275	CvPADLIST (cp) = 0;	299	CvPADLIST (cp) = 0;
276	SvREFCNT_dec (cp);	300	SvREFCNT_dec (cp);
277	#else	301	#else
278	CvPADLIST (cv) = coro_clone_padlist (cv);	302	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
279	#endif	303	#endif
280	}	304	}
281	}	305	}
282		306
283	static void	307	static void
284	put_padlist (CV *cv)	308	put_padlist (pTHX_ CV *cv)
285	{	309	{
286	MAGIC *mg = CORO_MAGIC (cv);	310	MAGIC *mg = CORO_MAGIC (cv);
287	AV *av;	311	AV *av;
288		312
289	if (!mg)	313	if (!mg)
…		…
300	av_extend (av, AvMAX (av) + 1);	324	av_extend (av, AvMAX (av) + 1);
301		325
302	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	326	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
303	}	327	}
304		328
		329	/ load & save, init *****************************************************/
		330
305	#define SB do {	331	#define SB do {
306	#define SE } while (0)	332	#define SE } while (0)
307		333
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE	334	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
309		335
310	static void	336	static void
311	load_perl (Coro__State c)	337	load_perl (pTHX_ Coro__State c)
312	{	338	{
313	#define VAR(name,type) PL_ ## name = c->name;	339	#define VAR(name,type) PL_ ## name = c->name;
314	# include "state.h"	340	# include "state.h"
315	#undef VAR	341	#undef VAR
316		342
…		…
334	CV *cv;	360	CV *cv;
335		361
336	/* now do the ugly restore mess */	362	/* now do the ugly restore mess */
337	while ((cv = (CV *)POPs))	363	while ((cv = (CV *)POPs))
338	{	364	{
339	put_padlist (cv); /* mark this padlist as available */	365	put_padlist (aTHX_ cv); /* mark this padlist as available */
340	CvDEPTH (cv) = PTR2IV (POPs);	366	CvDEPTH (cv) = PTR2IV (POPs);
341	CvPADLIST (cv) = (AV *)POPs;	367	CvPADLIST (cv) = (AV *)POPs;
342	}	368	}
343		369
344	PUTBACK;	370	PUTBACK;
345	}	371	}
		372	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
346	}	373	}
347		374
348	static void	375	static void
349	save_perl (Coro__State c)	376	save_perl (pTHX_ Coro__State c)
350	{	377	{
		378	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
351	{	379	{
352	dSP;	380	dSP;
353	I32 cxix = cxstack_ix;	381	I32 cxix = cxstack_ix;
354	PERL_CONTEXT *ccstk = cxstack;	382	PERL_CONTEXT *ccstk = cxstack;
355	PERL_SI *top_si = PL_curstackinfo;	383	PERL_SI *top_si = PL_curstackinfo;
…		…
378	PUSHs ((SV *)CvPADLIST (cv));	406	PUSHs ((SV *)CvPADLIST (cv));
379	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
380	PUSHs ((SV *)cv);	408	PUSHs ((SV *)cv);
381		409
382	CvDEPTH (cv) = 0;	410	CvDEPTH (cv) = 0;
383	get_padlist (cv);	411	get_padlist (aTHX_ cv);
384	}	412	}
385	}	413	}
386	}	414	}
387		415
388	if (top_si->si_type == PERLSI_MAIN)	416	if (top_si->si_type == PERLSI_MAIN)
…		…
410	* allocate various perl stacks. This is an exact copy	438	* allocate various perl stacks. This is an exact copy
411	* of perl.c:init_stacks, except that it uses less memory	439	* of perl.c:init_stacks, except that it uses less memory
412	* on the (sometimes correct) assumption that coroutines do	440	* on the (sometimes correct) assumption that coroutines do
413	* not usually need a lot of stackspace.	441	* not usually need a lot of stackspace.
414	*/	442	*/
415	#if PREFER_PERL_FUNCTIONS	443	#if CORO_PREFER_PERL_FUNCTIONS
416	# define coro_init_stacks init_stacks	444	# define coro_init_stacks init_stacks
417	#else	445	#else
418	static void	446	static void
419	coro_init_stacks ()	447	coro_init_stacks (pTHX)
420	{	448	{
421	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
422	PL_curstackinfo->si_type = PERLSI_MAIN;	450	PL_curstackinfo->si_type = PERLSI_MAIN;
423	PL_curstack = PL_curstackinfo->si_stack;	451	PL_curstack = PL_curstackinfo->si_stack;
424	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
458		486
459	/*	487	/*
460	* destroy the stacks, the callchain etc...	488	* destroy the stacks, the callchain etc...
461	*/	489	*/
462	static void	490	static void
463	coro_destroy_stacks ()	491	coro_destroy_stacks (pTHX)
464	{	492	{
465	if (!IN_DESTRUCT)	493	if (!IN_DESTRUCT)
466	{	494	{
467	/* restore all saved variables and stuff */	495	/* restore all saved variables and stuff */
468	LEAVE_SCOPE (0);	496	LEAVE_SCOPE (0);
…		…
470		498
471	/* free all temporaries */	499	/* free all temporaries */
472	FREETMPS;	500	FREETMPS;
473	assert (PL_tmps_ix == -1);	501	assert (PL_tmps_ix == -1);
474		502
		503	/* unwind all extra stacks */
475	POPSTACK_TO (PL_mainstack);	504	POPSTACK_TO (PL_mainstack);
		505
		506	/* unwind main stack */
		507	dounwind (-1);
476	}	508	}
477		509
478	while (PL_curstackinfo->si_next)	510	while (PL_curstackinfo->si_next)
479	PL_curstackinfo = PL_curstackinfo->si_next;	511	PL_curstackinfo = PL_curstackinfo->si_next;
480		512
…		…
497	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
498	Safefree (PL_retstack);	530	Safefree (PL_retstack);
499	#endif	531	#endif
500	}	532	}
501		533
		534	/ coroutine stack handling **********************************************/
		535
502	static void	536	static void
503	setup_coro (struct coro *coro)	537	setup_coro (pTHX_ struct coro *coro)
504	{	538	{
505	/*	539	/*
506	* emulate part of the perl startup here.	540	* emulate part of the perl startup here.
507	*/	541	*/
508
509	coro_init_stacks ();	542	coro_init_stacks (aTHX);
510		543
511	PL_curcop = &PL_compiling;	544	PL_curcop = &PL_compiling;
512	PL_in_eval = EVAL_NULL;	545	PL_in_eval = EVAL_NULL;
		546	PL_comppad = 0;
513	PL_curpm = 0;	547	PL_curpm = 0;
514	PL_localizing = 0;	548	PL_localizing = 0;
515	PL_dirty = 0;	549	PL_dirty = 0;
516	PL_restartop = 0;	550	PL_restartop = 0;
517		551
…		…
536		570
537	ENTER; /* necessary e.g. for dounwind */	571	ENTER; /* necessary e.g. for dounwind */
538	}	572	}
539		573
540	static void	574	static void
541	free_coro_mortal ()	575	free_coro_mortal (pTHX)
542	{	576	{
543	if (coro_mortal)	577	if (coro_mortal)
544	{	578	{
545	SvREFCNT_dec (coro_mortal);	579	SvREFCNT_dec (coro_mortal);
546	coro_mortal = 0;	580	coro_mortal = 0;
547	}	581	}
548	}	582	}
549		583
550	/* inject a fake call to Coro::State::_cctx_init into the execution */	584	/* inject a fake call to Coro::State::_cctx_init into the execution */
551	static void NOINLINE	585	static void NOINLINE
552	prepare_cctx (coro_cctx *cctx)	586	prepare_cctx (pTHX_ coro_cctx *cctx)
553	{	587	{
554	dSP;	588	dSP;
555	LOGOP myop;	589	LOGOP myop;
556		590
557	Zero (&myop, 1, LOGOP);	591	Zero (&myop, 1, LOGOP);
…		…
569	}	603	}
570		604
571	static void	605	static void
572	coro_run (void *arg)	606	coro_run (void *arg)
573	{	607	{
		608	dTHX;
		609
574	/* coro_run is the alternative tail of transfer(), so unlock here. */	610	/* coro_run is the alternative tail of transfer(), so unlock here. */
575	UNLOCK;	611	UNLOCK;
576		612
577	/*	613	/*
578	* this is a _very_ stripped down perl interpreter ;)	614	* this is a _very_ stripped down perl interpreter ;)
579	*/	615	*/
580	PL_top_env = &PL_start_env;	616	PL_top_env = &PL_start_env;
581		617
582	/* inject call to cctx_init */	618	/* inject call to cctx_init */
583	prepare_cctx ((coro_cctx *)arg);	619	prepare_cctx (aTHX_ (coro_cctx *)arg);
584		620
585	/* somebody will hit me for both perl_run and PL_restartop */	621	/* somebody will hit me for both perl_run and PL_restartop */
586	PL_restartop = PL_op;	622	PL_restartop = PL_op;
587	perl_run (PL_curinterp);	623	perl_run (PL_curinterp);
588		624
…		…
592		628
593	static coro_cctx *	629	static coro_cctx *
594	cctx_new ()	630	cctx_new ()
595	{	631	{
596	coro_cctx *cctx;	632	coro_cctx *cctx;
		633	void *stack_start;
		634	size_t stack_size;
597		635
598	++cctx_count;	636	++cctx_count;
599		637
600	Newz (0, cctx, 1, coro_cctx);	638	Newz (0, cctx, 1, coro_cctx);
601		639
602	#if HAVE_MMAP	640	#if HAVE_MMAP
603		641
604	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	642	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
605	/* mmap supposedly does allocate-on-write for us */	643	/* mmap supposedly does allocate-on-write for us */
606	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	644	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
607		645
608	if (cctx->sptr == (void *)-1)	646	if (cctx->sptr != (void *)-1)
609	{
610	perror ("FATAL: unable to mmap stack for coroutine");
611	_exit (EXIT_FAILURE);
612	}	647	{
613
614	# if STACKGUARD	648	# if CORO_STACKGUARD
615	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
616	# endif	650	# endif
		651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		653	cctx->mapped = 1;
		654	}
		655	else
		656	#endif
		657	{
		658	cctx->ssize = coro_stacksize * (long)sizeof (long);
		659	New (0, cctx->sptr, coro_stacksize, long);
617		660
618	#else
619
620	cctx->ssize = STACKSIZE * (long)sizeof (long);
621	New (0, cctx->sptr, STACKSIZE, long);
622
623	if (!cctx->sptr)	661	if (!cctx->sptr)
624	{	662	{
625	perror ("FATAL: unable to malloc stack for coroutine");	663	perror ("FATAL: unable to allocate stack for coroutine");
626	_exit (EXIT_FAILURE);	664	_exit (EXIT_FAILURE);
627	}	665	}
628		666
629	#endif	667	stack_start = cctx->sptr;
		668	stack_size = cctx->ssize;
		669	}
630		670
631	#if USE_VALGRIND	671	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
632	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
633	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
634	cctx->ssize + (char *)cctx->sptr
635	);
636	#endif
637
638	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	672	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
639		673
640	return cctx;	674	return cctx;
641	}	675	}
642		676
643	static void	677	static void
…		…
646	if (!cctx)	680	if (!cctx)
647	return;	681	return;
648		682
649	--cctx_count;	683	--cctx_count;
650		684
651	#if USE_VALGRIND	685	#if CORO_USE_VALGRIND
652	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
653	#endif	687	#endif
654		688
655	#if HAVE_MMAP	689	#if HAVE_MMAP
		690	if (cctx->mapped)
656	munmap (cctx->sptr, cctx->ssize);	691	munmap (cctx->sptr, cctx->ssize);
657	#else	692	else
		693	#endif
658	Safefree (cctx->sptr);	694	Safefree (cctx->sptr);
659	#endif
660		695
661	Safefree (cctx);	696	Safefree (cctx);
662	}	697	}
663		698
664	static coro_cctx *	699	static coro_cctx *
665	cctx_get ()	700	cctx_get (pTHX)
666	{	701	{
667	coro_cctx *cctx;
668
669	if (cctx_first)	702	while (cctx_first)
670	{	703	{
671	cctx = cctx_first;	704	coro_cctx *cctx = cctx_first;
672	cctx_first = cctx->next;	705	cctx_first = cctx->next;
673	--cctx_idle;	706	--cctx_idle;
		707
		708	if (cctx->ssize >= coro_stacksize)
		709	return cctx;
		710
		711	cctx_destroy (cctx);
674	}	712	}
675	else	713
676	{
677	cctx = cctx_new ();
678	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
679	}
680
681	return cctx;	715	return cctx_new ();
682	}	716	}
683		717
684	static void	718	static void
685	cctx_put (coro_cctx *cctx)	719	cctx_put (coro_cctx *cctx)
686	{	720	{
…		…
698	++cctx_idle;	732	++cctx_idle;
699	cctx->next = cctx_first;	733	cctx->next = cctx_first;
700	cctx_first = cctx;	734	cctx_first = cctx;
701	}	735	}
702		736
		737	/ coroutine switching ***************************************************/
		738
703	/* never call directly, always through the coro_state_transfer global variable */	739	/* never call directly, always through the coro_state_transfer global variable */
704	static void NOINLINE	740	static void NOINLINE
705	transfer (struct coro prev, struct coro next)	741	transfer (pTHX_ struct coro prev, struct coro next)
706	{	742	{
707	dSTACKLEVEL;	743	dSTACKLEVEL;
708		744
709	/* sometimes transfer is only called to set idle_sp */	745	/* sometimes transfer is only called to set idle_sp */
710	if (!next)	746	if (!next)
711	{	747	{
712	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
713	assert (((coro_cctx )prev)->top_env = PL_top_env); / just for the side effetc when assert is enabled */	749	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
714	}	750	}
715	else if (prev != next)	751	else if (prev != next)
716	{	752	{
717	coro_cctx *prev__cctx;	753	coro_cctx *prev__cctx;
718		754
…		…
730	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	766	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
731		767
732	if (next->flags & CF_RUNNING)	768	if (next->flags & CF_RUNNING)
733	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	769	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
734		770
		771	if (next->flags & CF_DESTROYED)
		772	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		773
735	prev->flags &= ~CF_RUNNING;	774	prev->flags &= ~CF_RUNNING;
736	next->flags \|= CF_RUNNING;	775	next->flags \|= CF_RUNNING;
737		776
738	LOCK;	777	LOCK;
739		778
740	if (next->flags & CF_NEW)	779	if (next->flags & CF_NEW)
741	{	780	{
742	/* need to start coroutine */	781	/* need to start coroutine */
743	next->flags &= ~CF_NEW;	782	next->flags &= ~CF_NEW;
744	/* first get rid of the old state */	783	/* first get rid of the old state */
745	save_perl (prev);	784	save_perl (aTHX_ prev);
746	/* setup coroutine call */	785	/* setup coroutine call */
747	setup_coro (next);	786	setup_coro (aTHX_ next);
748	/* need a new stack */	787	/* need a new stack */
749	assert (!next->cctx);	788	assert (!next->cctx);
750	}	789	}
751	else	790	else
752	{	791	{
753	/* coroutine already started */	792	/* coroutine already started */
754	save_perl (prev);	793	save_perl (aTHX_ prev);
755	load_perl (next);	794	load_perl (aTHX_ next);
756	}	795	}
757		796
758	prev__cctx = prev->cctx;	797	prev__cctx = prev->cctx;
759		798
760	/* possibly "free" the cctx */	799	/* possibly "free" the cctx */
761	if (prev__cctx->idle_sp == STACKLEVEL)	800	if (prev__cctx->idle_sp == STACKLEVEL)
762	{	801	{
763	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	802	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
764	assert (PL_top_env == prev__cctx->top_env);	803	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
765		804
766	prev->cctx = 0;	805	prev->cctx = 0;
767		806
768	cctx_put (prev__cctx);	807	cctx_put (prev__cctx);
769	prev__cctx->inuse = 0;	808	prev__cctx->inuse = 0;
770	}	809	}
771		810
772	if (!next->cctx)	811	if (!next->cctx)
773	{	812	{
774	next->cctx = cctx_get ();	813	next->cctx = cctx_get (aTHX);
775	assert (!next->cctx->inuse);	814	assert (!next->cctx->inuse);
776	next->cctx->inuse = 1;	815	next->cctx->inuse = 1;
777	}	816	}
778		817
779	if (prev__cctx != next->cctx)	818	if (prev__cctx != next->cctx)
…		…
781	prev__cctx->top_env = PL_top_env;	820	prev__cctx->top_env = PL_top_env;
782	PL_top_env = next->cctx->top_env;	821	PL_top_env = next->cctx->top_env;
783	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
784	}	823	}
785		824
786	free_coro_mortal ();	825	free_coro_mortal (aTHX);
787
788	UNLOCK;	826	UNLOCK;
789	}	827	}
790	}	828	}
791		829
792	struct transfer_args	830	struct transfer_args
793	{	831	{
794	struct coro prev, next;	832	struct coro prev, next;
795	};	833	};
796		834
797	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
798		836
		837	/ high level stuff ******************************************************/
		838
799	static void	839	static int
800	coro_state_destroy (struct coro *coro)	840	coro_state_destroy (pTHX_ struct coro *coro)
801	{	841	{
802	if (coro->refcnt--)	842	if (coro->flags & CF_DESTROYED)
803	return;	843	return 0;
		844
		845	coro->flags \|= CF_DESTROYED;
		846
		847	if (coro->flags & CF_READY)
		848	{
		849	/* reduce nready, as destroying a ready coro effectively unreadies it */
		850	/* alternative: look through all ready queues and remove the coro */
		851	LOCK;
		852	--coro_nready;
		853	UNLOCK;
		854	}
		855	else
		856	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
804		857
805	if (coro->mainstack && coro->mainstack != main_mainstack)	858	if (coro->mainstack && coro->mainstack != main_mainstack)
806	{	859	{
807	struct coro temp;	860	struct coro temp;
		861
		862	assert (!(coro->flags & CF_RUNNING));
		863
808	Zero (&temp, 1, struct coro);	864	Zero (&temp, 1, struct coro);
809	temp.save = CORO_SAVE_ALL;	865	temp.save = CORO_SAVE_ALL;
810		866
811	if (coro->flags & CF_RUNNING)	867	if (coro->flags & CF_RUNNING)
812	croak ("FATAL: tried to destroy currently running coroutine");	868	croak ("FATAL: tried to destroy currently running coroutine");
813		869
814	save_perl (&temp);	870	save_perl (aTHX_ &temp);
815	load_perl (coro);	871	load_perl (aTHX_ coro);
816		872
817	coro_destroy_stacks ();	873	coro_destroy_stacks (aTHX);
818		874
819	load_perl (&temp); /* this will get rid of defsv etc.. */	875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
820		876
821	coro->mainstack = 0;	877	coro->mainstack = 0;
822	}	878	}
823		879
824	cctx_destroy (coro->cctx);	880	cctx_destroy (coro->cctx);
825	SvREFCNT_dec (coro->args);	881	SvREFCNT_dec (coro->args);
826	Safefree (coro);	882
		883	return 1;
827	}	884	}
828		885
829	static int	886	static int
830	coro_state_clear (pTHX_ SV sv, MAGIC mg)	887	coro_state_free (pTHX_ SV sv, MAGIC mg)
831	{	888	{
832	struct coro coro = (struct coro )mg->mg_ptr;	889	struct coro coro = (struct coro )mg->mg_ptr;
833	mg->mg_ptr = 0;	890	mg->mg_ptr = 0;
834		891
		892	if (--coro->refcnt < 0)
		893	{
835	coro_state_destroy (coro);	894	coro_state_destroy (aTHX_ coro);
		895	Safefree (coro);
		896	}
836		897
837	return 0;	898	return 0;
838	}	899	}
839		900
840	static int	901	static int
…		…
847	return 0;	908	return 0;
848	}	909	}
849		910
850	static MGVTBL coro_state_vtbl = {	911	static MGVTBL coro_state_vtbl = {
851	0, 0, 0, 0,	912	0, 0, 0, 0,
852	coro_state_clear,	913	coro_state_free,
853	0,	914	0,
854	#ifdef MGf_DUP	915	#ifdef MGf_DUP
855	coro_state_dup,	916	coro_state_dup,
856	#else	917	#else
857	# define MGf_DUP 0	918	# define MGf_DUP 0
858	#endif	919	#endif
859	};	920	};
860		921
861	static struct coro *	922	static struct coro *
862	SvSTATE (SV *coro)	923	SvSTATE_ (pTHX_ SV *coro)
863	{	924	{
864	HV *stash;	925	HV *stash;
865	MAGIC *mg;	926	MAGIC *mg;
866		927
867	if (SvROK (coro))	928	if (SvROK (coro))
…		…
873	/* very slow, but rare, check */	934	/* very slow, but rare, check */
874	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	935	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
875	croak ("Coro::State object required");	936	croak ("Coro::State object required");
876	}	937	}
877		938
878	mg = SvMAGIC (coro);	939	mg = CORO_MAGIC (coro);
879	assert (mg->mg_type == PERL_MAGIC_ext);
880	return (struct coro *)mg->mg_ptr;	940	return (struct coro *)mg->mg_ptr;
881	}	941	}
882		942
		943	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		944
883	static void	945	static void
884	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)	946	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
885	{	947	{
886	ta->prev = SvSTATE (prev_sv);	948	ta->prev = SvSTATE (prev_sv);
887	ta->next = SvSTATE (next_sv);	949	ta->next = SvSTATE (next_sv);
888	}	950	}
889		951
890	static void	952	static void
891	api_transfer (SV prev_sv, SV next_sv)	953	api_transfer (SV prev_sv, SV next_sv)
892	{	954	{
		955	dTHX;
893	struct transfer_args ta;	956	struct transfer_args ta;
894		957
895	prepare_transfer (&ta, prev_sv, next_sv);	958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
896	TRANSFER (ta);	959	TRANSFER (ta);
897	}	960	}
898		961
899	static int	962	static int
900	api_save (SV *coro_sv, int new_save)	963	api_save (SV *coro_sv, int new_save)
901	{	964	{
		965	dTHX;
902	struct coro *coro = SvSTATE (coro_sv);	966	struct coro *coro = SvSTATE (coro_sv);
903	int old_save = coro->save;	967	int old_save = coro->save;
904		968
905	if (new_save >= 0)	969	if (new_save >= 0)
906	coro->save = new_save;	970	coro->save = new_save;
…		…
908	return old_save;	972	return old_save;
909	}	973	}
910		974
911	/ Coro ******************************************************************/	975	/ Coro ******************************************************************/
912		976
913	#define PRIO_MAX 3
914	#define PRIO_HIGH 1
915	#define PRIO_NORMAL 0
916	#define PRIO_LOW -1
917	#define PRIO_IDLE -3
918	#define PRIO_MIN -4
919
920	/* for Coro.pm */
921	static SV *coro_current;
922	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
923	static int coro_nready;
924
925	static void	977	static void
926	coro_enq (SV *coro_sv)	978	coro_enq (pTHX_ SV *coro_sv)
927	{	979	{
928	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
929	coro_nready++;
930	}	981	}
931		982
932	static SV *	983	static SV *
933	coro_deq (int min_prio)	984	coro_deq (pTHX_ int min_prio)
934	{	985	{
935	int prio = PRIO_MAX - PRIO_MIN;	986	int prio = PRIO_MAX - PRIO_MIN;
936		987
937	min_prio -= PRIO_MIN;	988	min_prio -= PRIO_MIN;
938	if (min_prio < 0)	989	if (min_prio < 0)
939	min_prio = 0;	990	min_prio = 0;
940		991
941	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
942	if (AvFILLp (coro_ready [prio]) >= 0)	993	if (AvFILLp (coro_ready [prio]) >= 0)
943	{
944	coro_nready--;
945	return av_shift (coro_ready [prio]);	994	return av_shift (coro_ready [prio]);
946	}
947		995
948	return 0;	996	return 0;
949	}	997	}
950		998
951	static int	999	static int
952	api_ready (SV *coro_sv)	1000	api_ready (SV *coro_sv)
953	{	1001	{
		1002	dTHX;
954	struct coro *coro;	1003	struct coro *coro;
955		1004
956	if (SvROK (coro_sv))	1005	if (SvROK (coro_sv))
957	coro_sv = SvRV (coro_sv);	1006	coro_sv = SvRV (coro_sv);
958		1007
…		…
962	return 0;	1011	return 0;
963		1012
964	coro->flags \|= CF_READY;	1013	coro->flags \|= CF_READY;
965		1014
966	LOCK;	1015	LOCK;
967	coro_enq (SvREFCNT_inc (coro_sv));	1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1017	++coro_nready;
968	UNLOCK;	1018	UNLOCK;
969		1019
970	return 1;	1020	return 1;
971	}	1021	}
972		1022
973	static int	1023	static int
974	api_is_ready (SV *coro_sv)	1024	api_is_ready (SV *coro_sv)
975	{	1025	{
		1026	dTHX;
976	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1027	return !!(SvSTATE (coro_sv)->flags & CF_READY);
977	}	1028	}
978		1029
979	static void	1030	static void
980	prepare_schedule (struct transfer_args *ta)	1031	prepare_schedule (pTHX_ struct transfer_args *ta)
981	{	1032	{
982	SV prev, next;	1033	SV prev_sv, next_sv;
983		1034
984	for (;;)	1035	for (;;)
985	{	1036	{
986	LOCK;	1037	LOCK;
987	next = coro_deq (PRIO_MIN);	1038	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1039
		1040	/* nothing to schedule: call the idle handler */
		1041	if (!next_sv)
		1042	{
		1043	dSP;
		1044	UNLOCK;
		1045
		1046	ENTER;
		1047	SAVETMPS;
		1048
		1049	PUSHMARK (SP);
		1050	PUTBACK;
		1051	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1052
		1053	FREETMPS;
		1054	LEAVE;
		1055	continue;
		1056	}
		1057
		1058	ta->next = SvSTATE (next_sv);
		1059
		1060	/* cannot transfer to destroyed coros, skip and look for next */
		1061	if (ta->next->flags & CF_DESTROYED)
		1062	{
		1063	UNLOCK;
		1064	SvREFCNT_dec (next_sv);
		1065	/* coro_nready is already taken care of by destroy */
		1066	continue;
		1067	}
		1068
		1069	--coro_nready;
988	UNLOCK;	1070	UNLOCK;
989
990	if (next)
991	break;	1071	break;
992
993	{
994	dSP;
995
996	ENTER;
997	SAVETMPS;
998
999	PUSHMARK (SP);
1000	PUTBACK;
1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1002
1003	FREETMPS;
1004	LEAVE;
1005	}	1072	}
1006	}
1007
1008	prev = SvRV (coro_current);
1009	SvRV_set (coro_current, next);
1010		1073
1011	/* free this only after the transfer */	1074	/* free this only after the transfer */
1012	LOCK;	1075	prev_sv = SvRV (coro_current);
1013	free_coro_mortal ();	1076	SvRV_set (coro_current, next_sv);
1014	UNLOCK;
1015	coro_mortal = prev;
1016
1017	assert (!SvROK(prev));//D
1018	assert (!SvROK(next));//D
1019
1020	ta->prev = SvSTATE (prev);	1077	ta->prev = SvSTATE (prev_sv);
1021	ta->next = SvSTATE (next);
1022		1078
1023	assert (ta->next->flags & CF_READY);	1079	assert (ta->next->flags & CF_READY);
1024	ta->next->flags &= ~CF_READY;	1080	ta->next->flags &= ~CF_READY;
1025	}
1026		1081
		1082	LOCK;
		1083	free_coro_mortal (aTHX);
		1084	coro_mortal = prev_sv;
		1085	UNLOCK;
		1086	}
		1087
1027	static void	1088	static void
1028	prepare_cede (struct transfer_args *ta)	1089	prepare_cede (pTHX_ struct transfer_args *ta)
1029	{	1090	{
1030	api_ready (coro_current);	1091	api_ready (coro_current);
1031	prepare_schedule (ta);	1092	prepare_schedule (aTHX_ ta);
1032	}	1093	}
1033		1094
1034	static int	1095	static int
1035	prepare_cede_notself (struct transfer_args *ta)	1096	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1036	{	1097	{
1037	if (coro_nready)	1098	if (coro_nready)
1038	{	1099	{
1039	SV *prev = SvRV (coro_current);	1100	SV *prev = SvRV (coro_current);
1040	prepare_schedule (ta);	1101	prepare_schedule (aTHX_ ta);
1041	api_ready (prev);	1102	api_ready (prev);
1042	return 1;	1103	return 1;
1043	}	1104	}
1044	else	1105	else
1045	return 0;	1106	return 0;
1046	}	1107	}
1047		1108
1048	static void	1109	static void
1049	api_schedule (void)	1110	api_schedule (void)
1050	{	1111	{
		1112	dTHX;
1051	struct transfer_args ta;	1113	struct transfer_args ta;
1052		1114
1053	prepare_schedule (&ta);	1115	prepare_schedule (aTHX_ &ta);
1054	TRANSFER (ta);	1116	TRANSFER (ta);
1055	}	1117	}
1056		1118
1057	static int	1119	static int
1058	api_cede (void)	1120	api_cede (void)
1059	{	1121	{
		1122	dTHX;
1060	struct transfer_args ta;	1123	struct transfer_args ta;
1061		1124
1062	prepare_cede (&ta);	1125	prepare_cede (aTHX_ &ta);
1063		1126
1064	if (ta.prev != ta.next)	1127	if (ta.prev != ta.next)
1065	{	1128	{
1066	TRANSFER (ta);	1129	TRANSFER (ta);
1067	return 1;	1130	return 1;
…		…
1071	}	1134	}
1072		1135
1073	static int	1136	static int
1074	api_cede_notself (void)	1137	api_cede_notself (void)
1075	{	1138	{
		1139	dTHX;
1076	struct transfer_args ta;	1140	struct transfer_args ta;
1077		1141
1078	if (prepare_cede_notself (&ta))	1142	if (prepare_cede_notself (aTHX_ &ta))
1079	{	1143	{
1080	TRANSFER (ta);	1144	TRANSFER (ta);
1081	return 1;	1145	return 1;
1082	}	1146	}
1083	else	1147	else
…		…
1161		1225
1162	case 1:	1226	case 1:
1163	if (items != 2)	1227	if (items != 2)
1164	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1228	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1165		1229
1166	prepare_transfer (&ta, ST (0), ST (1));	1230	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1167	break;	1231	break;
1168		1232
1169	case 2:	1233	case 2:
1170	prepare_schedule (&ta);	1234	prepare_schedule (aTHX_ &ta);
1171	break;	1235	break;
1172		1236
1173	case 3:	1237	case 3:
1174	prepare_cede (&ta);	1238	prepare_cede (aTHX_ &ta);
1175	break;	1239	break;
1176		1240
1177	case 4:	1241	case 4:
1178	if (!prepare_cede_notself (&ta))	1242	if (!prepare_cede_notself (aTHX_ &ta))
1179	XSRETURN_EMPTY;	1243	XSRETURN_EMPTY;
1180		1244
1181	break;	1245	break;
1182	}	1246	}
1183		1247
1184	BARRIER;	1248	BARRIER;
1185	TRANSFER (ta);	1249	TRANSFER (ta);
1186	}
1187		1250
1188	void	1251	if (GIMME_V != G_VOID && ta.next != ta.prev)
1189	_clone_state_from (SV dst, SV src)	1252	XSRETURN_YES;
		1253	}
		1254
		1255	bool
		1256	_destroy (SV *coro_sv)
1190	CODE:	1257	CODE:
1191	{	1258	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1192	struct coro *coro_src = SvSTATE (src);	1259	OUTPUT:
1193		1260	RETVAL
1194	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1195
1196	++coro_src->refcnt;
1197	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1198	}
1199		1261
1200	void	1262	void
1201	_exit (code)	1263	_exit (code)
1202	int code	1264	int code
1203	PROTOTYPE: $	1265	PROTOTYPE: $
1204	CODE:	1266	CODE:
1205	_exit (code);	1267	_exit (code);
		1268
		1269	int
		1270	cctx_stacksize (int new_stacksize = 0)
		1271	CODE:
		1272	RETVAL = coro_stacksize;
		1273	if (new_stacksize)
		1274	coro_stacksize = new_stacksize;
		1275	OUTPUT:
		1276	RETVAL
1206		1277
1207	int	1278	int
1208	cctx_count ()	1279	cctx_count ()
1209	CODE:	1280	CODE:
1210	RETVAL = cctx_count;	1281	RETVAL = cctx_count;

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Comparing Coro/Coro/State.xs (file contents): Revision 1.131 by root, Fri Dec 29 11:37:49 2006 UTC vs. Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.131 by root, Fri Dec 29 11:37:49 2006 UTC vs.
Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC