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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.14 by root, Mon Jul 23 23:48:05 2001 UTC vs.
Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
		5	#include "patchlevel.h"
		6
		7	#if PATCHLEVEL < 6
		8	# ifndef PL_ppaddr
		9	# define PL_ppaddr ppaddr
		10	# endif
		11	# ifndef call_sv
		12	# define call_sv perl_call_sv
		13	# endif
		14	# ifndef get_sv
		15	# define get_sv perl_get_sv
		16	# endif
		17	# ifndef get_cv
		18	# define get_cv perl_get_cv
		19	# endif
		20	# ifndef IS_PADGV
		21	# define IS_PADGV(v) 0
		22	# endif
		23	# ifndef IS_PADCONST
		24	# define IS_PADCONST(v) 0
		25	# endif
		26	#endif
		27
5	#include "libcoro/coro.c"	28	#include "libcoro/coro.c"
		29
		30	#include <signal.h>
6		31
7	#ifdef HAVE_MMAP	32	#ifdef HAVE_MMAP
8	# include <unistd.h>	33	# include <unistd.h>
9	# include <sys/mman.h>	34	# include <sys/mman.h>
		35	# ifndef MAP_ANONYMOUS
		36	# ifdef MAP_ANON
		37	# define MAP_ANONYMOUS MAP_ANON
		38	# else
		39	# undef HAVE_MMAP
		40	# endif
10	#endif	41	# endif
		42	#endif
11		43
12	#define MAY_FLUSH /* increases codesize */	44	#define MAY_FLUSH /* increases codesize and is rarely used */
13
14	#define TRANSFER_SAVE_DEFAV 0x00000001
15	#define TRANSFER_SAVE_DEFSV 0x00000002
16	#define TRANSFER_SAVE_ERRSV 0x00000004
17	#define TRANSFER_SAVE_CCTXT 0x00000008
18
19	#define TRANSFER_SAVE_ALL -1
20		45
21	#define SUB_INIT "Coro::State::initialize"	46	#define SUB_INIT "Coro::State::initialize"
22	#define UCORO_STATE "_coro_state"	47	#define UCORO_STATE "_coro_state"
23		48
		49	/* The next macro should declare a variable stacklevel that contains and approximation
		50	* to the current C stack pointer. Its property is that it changes with each call
		51	* and should be unique. */
		52	#define dSTACKLEVEL void *stacklevel = &stacklevel
		53
		54	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		55
		56	#define labs(l) ((l) >= 0 ? (l) : -(l))
		57
		58	#include "CoroAPI.h"
		59
		60	static struct CoroAPI coroapi;
		61
		62	/* this is actually not only the c stack but also c registers etc... */
		63	typedef struct {
		64	int refcnt; /* pointer reference counter */
		65	int usecnt; /* shared by how many coroutines */
		66	int gencnt; /* generation counter */
		67
		68	coro_context cctx;
		69
		70	void *sptr;
		71	long ssize; /* positive == mmap, otherwise malloc */
		72	} coro_stack;
		73
24	struct coro {	74	struct coro {
		75	/* the top-level JMPENV for each coroutine, needed to catch dies. */
		76	JMPENV start_env;
		77
25	/* the optional C context */	78	/* the optional C context */
26	coro_context cctx;	79	coro_stack *stack;
27	void *sptr;	80	void *cursp;
28	long ssize;	81	int gencnt;
29		82
30	/* optionally saved, might be zero */	83	/* optionally saved, might be zero */
31	AV *defav;	84	AV *defav;
32	SV *defsv;	85	SV *defsv;
33	SV *errsv;	86	SV *errsv;
34		87
35	/* saved global state not related to stacks */	88	/* saved global state not related to stacks */
36	U8 dowarn;	89	U8 dowarn;
		90	I32 in_eval;
37		91
38	/* the stacks and related info (callchain etc..) */	92	/* the stacks and related info (callchain etc..) */
39	PERL_SI *curstackinfo;	93	PERL_SI *curstackinfo;
40	AV *curstack;	94	AV *curstack;
41	AV *mainstack;	95	AV *mainstack;
42	SV **stack_sp;	96	SV **stack_sp;
43	OP *op;	97	OP *op;
44	SV **curpad;	98	SV **curpad;
		99	AV *comppad;
45	SV **stack_base;	100	SV **stack_base;
46	SV **stack_max;	101	SV **stack_max;
47	SV **tmps_stack;	102	SV **tmps_stack;
48	I32 tmps_floor;	103	I32 tmps_floor;
49	I32 tmps_ix;	104	I32 tmps_ix;
59	I32 savestack_max;	114	I32 savestack_max;
60	OP **retstack;	115	OP **retstack;
61	I32 retstack_ix;	116	I32 retstack_ix;
62	I32 retstack_max;	117	I32 retstack_max;
63	COP *curcop;	118	COP *curcop;
64	JMPENV start_env;
65	JMPENV *top_env;	119	JMPENV *top_env;
66		120
67	/* data associated with this coroutine (initial args) */	121	/* data associated with this coroutine (initial args) */
68	AV *args;	122	AV *args;
69	};	123	};
…		…
74	static AV main_mainstack; / used to differentiate between $main and others */	128	static AV main_mainstack; / used to differentiate between $main and others */
75	static HV *coro_state_stash;	129	static HV *coro_state_stash;
76	static SV *ucoro_state_sv;	130	static SV *ucoro_state_sv;
77	static U32 ucoro_state_hash;	131	static U32 ucoro_state_hash;
78	static HV *padlist_cache;	132	static HV *padlist_cache;
		133	static SV coro_mortal; / will be freed after next transfer */
79		134
80	/* mostly copied from op.c:cv_clone2 */	135	/* mostly copied from op.c:cv_clone2 */
81	STATIC AV *	136	STATIC AV *
82	clone_padlist (AV *protopadlist)	137	clone_padlist (AV *protopadlist)
83	{	138	{
…		…
129	sv = (SV *) newAV ();	184	sv = (SV *) newAV ();
130	else if (*name == '%')	185	else if (*name == '%')
131	sv = (SV *) newHV ();	186	sv = (SV *) newHV ();
132	else	187	else
133	sv = NEWSV (0, 0);	188	sv = NEWSV (0, 0);
		189	#ifdef SvPADBUSY
134	if (!SvPADBUSY (sv))	190	if (!SvPADBUSY (sv))
		191	#endif
135	SvPADMY_on (sv);	192	SvPADMY_on (sv);
136	npad[ix] = sv;	193	npad[ix] = sv;
137	}	194	}
138	}	195	}
139	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	196	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
…		…
170		227
171	return newpadlist;	228	return newpadlist;
172	}	229	}
173		230
174	#ifdef MAY_FLUSH	231	#ifdef MAY_FLUSH
175	STATIC AV *	232	STATIC void
176	free_padlist (AV *padlist)	233	free_padlist (AV *padlist)
177	{	234	{
178	/* may be during global destruction */	235	/* may be during global destruction */
179	if (SvREFCNT(padlist))	236	if (SvREFCNT(padlist))
180	{	237	{
…		…
245	#endif	302	#endif
246		303
247	#define SB do {	304	#define SB do {
248	#define SE } while (0)	305	#define SE } while (0)
249		306
250	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	307	#define LOAD(state) load_state(aTHX_ (state));
251	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	308	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
252		309
253	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
254		311
255	static void	312	static void
256	load_state(pTHX_ Coro__State c)	313	load_state(pTHX_ Coro__State c)
257	{	314	{
258	PL_dowarn = c->dowarn;	315	PL_dowarn = c->dowarn;
		316	PL_in_eval = c->in_eval;
259		317
260	PL_curstackinfo = c->curstackinfo;	318	PL_curstackinfo = c->curstackinfo;
261	PL_curstack = c->curstack;	319	PL_curstack = c->curstack;
262	PL_mainstack = c->mainstack;	320	PL_mainstack = c->mainstack;
263	PL_stack_sp = c->stack_sp;	321	PL_stack_sp = c->stack_sp;
264	PL_op = c->op;	322	PL_op = c->op;
265	PL_curpad = c->curpad;	323	PL_curpad = c->curpad;
		324	PL_comppad = c->comppad;
266	PL_stack_base = c->stack_base;	325	PL_stack_base = c->stack_base;
267	PL_stack_max = c->stack_max;	326	PL_stack_max = c->stack_max;
268	PL_tmps_stack = c->tmps_stack;	327	PL_tmps_stack = c->tmps_stack;
269	PL_tmps_floor = c->tmps_floor;	328	PL_tmps_floor = c->tmps_floor;
270	PL_tmps_ix = c->tmps_ix;	329	PL_tmps_ix = c->tmps_ix;
…		…
280	PL_savestack_max = c->savestack_max;	339	PL_savestack_max = c->savestack_max;
281	PL_retstack = c->retstack;	340	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;	341	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;	342	PL_retstack_max = c->retstack_max;
284	PL_curcop = c->curcop;	343	PL_curcop = c->curcop;
285	PL_start_env = c->start_env;
286	PL_top_env = c->top_env;	344	PL_top_env = c->top_env;
287		345
288	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	346	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
289	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	347	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
290	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	348	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
330		388
331	PUSHs (Nullsv);	389	PUSHs (Nullsv);
332	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
333	for (;;)	391	for (;;)
334	{	392	{
335	do	393	while (cxix >= 0)
336	{	394	{
337	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
338		396
339	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE(cx) == CXt_SUB)
340	{	398	{
…		…
359	PUSHs ((SV *)cv);	417	PUSHs ((SV *)cv);
360		418
361	get_padlist (cv); /* this is a monster */	419	get_padlist (cv); /* this is a monster */
362	}	420	}
363	}	421	}
		422	#ifdef CXt_FORMAT
364	else if (CxTYPE(cx) == CXt_FORMAT)	423	else if (CxTYPE(cx) == CXt_FORMAT)
365	{	424	{
366	/* I never used formats, so how should I know how these are implemented? */	425	/* I never used formats, so how should I know how these are implemented? */
367	/* my bold guess is as a simple, plain sub... */	426	/* my bold guess is as a simple, plain sub... */
368	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	427	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
369	}	428	}
		429	#endif
370	}	430	}
371	while (cxix >= 0);
372		431
373	if (top_si->si_type == PERLSI_MAIN)	432	if (top_si->si_type == PERLSI_MAIN)
374	break;	433	break;
375		434
376	top_si = top_si->si_prev;	435	top_si = top_si->si_prev;
…		…
383		442
384	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	443	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
385	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	444	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
386	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	445	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
387		446
388	/* I have not the slightest idea of why av_reify is necessary */
389	/* but if it's missing the defav contents magically get replaced sometimes */
390	if (c->defav)
391	av_reify (c->defav);
392
393	c->dowarn = PL_dowarn;	447	c->dowarn = PL_dowarn;
		448	c->in_eval = PL_in_eval;
394		449
395	c->curstackinfo = PL_curstackinfo;	450	c->curstackinfo = PL_curstackinfo;
396	c->curstack = PL_curstack;	451	c->curstack = PL_curstack;
397	c->mainstack = PL_mainstack;	452	c->mainstack = PL_mainstack;
398	c->stack_sp = PL_stack_sp;	453	c->stack_sp = PL_stack_sp;
399	c->op = PL_op;	454	c->op = PL_op;
400	c->curpad = PL_curpad;	455	c->curpad = PL_curpad;
		456	c->comppad = PL_comppad;
401	c->stack_base = PL_stack_base;	457	c->stack_base = PL_stack_base;
402	c->stack_max = PL_stack_max;	458	c->stack_max = PL_stack_max;
403	c->tmps_stack = PL_tmps_stack;	459	c->tmps_stack = PL_tmps_stack;
404	c->tmps_floor = PL_tmps_floor;	460	c->tmps_floor = PL_tmps_floor;
405	c->tmps_ix = PL_tmps_ix;	461	c->tmps_ix = PL_tmps_ix;
…		…
415	c->savestack_max = PL_savestack_max;	471	c->savestack_max = PL_savestack_max;
416	c->retstack = PL_retstack;	472	c->retstack = PL_retstack;
417	c->retstack_ix = PL_retstack_ix;	473	c->retstack_ix = PL_retstack_ix;
418	c->retstack_max = PL_retstack_max;	474	c->retstack_max = PL_retstack_max;
419	c->curcop = PL_curcop;	475	c->curcop = PL_curcop;
420	c->start_env = PL_start_env;
421	c->top_env = PL_top_env;	476	c->top_env = PL_top_env;
422	}	477	}
423		478
424	/*	479	/*
425	* allocate various perl stacks. This is an exact copy	480	* allocate various perl stacks. This is an exact copy
…		…
437		492
438	PL_stack_base = AvARRAY(PL_curstack);	493	PL_stack_base = AvARRAY(PL_curstack);
439	PL_stack_sp = PL_stack_base;	494	PL_stack_sp = PL_stack_base;
440	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	495	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
441		496
442	New(50,PL_tmps_stack,64,SV*);	497	New(50,PL_tmps_stack,96,SV*);
443	PL_tmps_floor = -1;	498	PL_tmps_floor = -1;
444	PL_tmps_ix = -1;	499	PL_tmps_ix = -1;
445	PL_tmps_max = 64;	500	PL_tmps_max = 96;
446		501
447	New(54,PL_markstack,12,I32);	502	New(54,PL_markstack,16,I32);
448	PL_markstack_ptr = PL_markstack;	503	PL_markstack_ptr = PL_markstack;
449	PL_markstack_max = PL_markstack + 12;	504	PL_markstack_max = PL_markstack + 16;
450		505
		506	#ifdef SET_MARK_OFFSET
451	SET_MARK_OFFSET;	507	SET_MARK_OFFSET;
		508	#endif
452		509
453	New(54,PL_scopestack,12,I32);	510	New(54,PL_scopestack,16,I32);
454	PL_scopestack_ix = 0;	511	PL_scopestack_ix = 0;
455	PL_scopestack_max = 12;	512	PL_scopestack_max = 16;
456		513
457	New(54,PL_savestack,64,ANY);	514	New(54,PL_savestack,96,ANY);
458	PL_savestack_ix = 0;	515	PL_savestack_ix = 0;
459	PL_savestack_max = 64;	516	PL_savestack_max = 96;
460		517
461	New(54,PL_retstack,8,OP*);	518	New(54,PL_retstack,8,OP*);
462	PL_retstack_ix = 0;	519	PL_retstack_ix = 0;
463	PL_retstack_max = 8;	520	PL_retstack_max = 8;
464	}	521	}
465		522
466	/*	523	/*
467	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
468	* still there is a memleak of 128 bytes...
469	*/	525	*/
470	STATIC void	526	STATIC void
471	destroy_stacks(pTHX)	527	destroy_stacks(pTHX)
472	{	528	{
		529	if (!IN_DESTRUCT)
		530	{
473	/* is this ugly, I ask? */	531	/* is this ugly, I ask? */
474	while (PL_scopestack_ix)	532	while (PL_scopestack_ix)
475	LEAVE;	533	LEAVE;
476		534
477	/* sure it is, but more important: is it correct?? :/ */	535	/* sure it is, but more important: is it correct?? :/ */
478	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	536	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
479	FREETMPS;	537	FREETMPS;
		538	}
480		539
481	while (PL_curstackinfo->si_next)	540	while (PL_curstackinfo->si_next)
482	PL_curstackinfo = PL_curstackinfo->si_next;	541	PL_curstackinfo = PL_curstackinfo->si_next;
483		542
484	while (PL_curstackinfo)	543	while (PL_curstackinfo)
…		…
489	dSP;	548	dSP;
490	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	549	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
491	PUTBACK; /* possibly superfluous */	550	PUTBACK; /* possibly superfluous */
492	}	551	}
493		552
		553	if (!IN_DESTRUCT)
		554	{
494	dounwind(-1);	555	dounwind(-1);
495
496	SvREFCNT_dec(PL_curstackinfo->si_stack);	556	SvREFCNT_dec(PL_curstackinfo->si_stack);
		557	}
		558
497	Safefree(PL_curstackinfo->si_cxstack);	559	Safefree(PL_curstackinfo->si_cxstack);
498	Safefree(PL_curstackinfo);	560	Safefree(PL_curstackinfo);
499	PL_curstackinfo = p;	561	PL_curstackinfo = p;
500	}	562	}
501		563
…		…
505	Safefree(PL_savestack);	567	Safefree(PL_savestack);
506	Safefree(PL_retstack);	568	Safefree(PL_retstack);
507	}	569	}
508		570
509	static void	571	static void
510	allocate_stack (Coro__State ctx)	572	allocate_stack (Coro__State ctx, int alloc)
511	{	573	{
		574	coro_stack *stack;
		575
		576	New (0, stack, 1, coro_stack);
		577
		578	stack->refcnt = 1;
		579	stack->usecnt = 1;
		580	stack->gencnt = ctx->gencnt = 0;
		581	if (alloc)
		582	{
512	#ifdef HAVE_MMAP	583	#if HAVE_MMAP
513	ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */	584	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
514	ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);	585	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
515	if (ctx->sptr == (void *)-1)	586	if (stack->sptr == (void *)-1)
516	#endif	587	#endif
517	{	588	{
518	/FIXME//D//* reasonable stack size! */	589	/FIXME//D//* reasonable stack size! */
519	ctx->ssize = 4096 * sizeof (long);	590	stack->ssize = -4096 * sizeof (long);
520	New (0, ctx->sptr, 4096, long);	591	New (0, stack->sptr, 4096, long);
		592	}
521	}	593	}
		594	else
		595	stack->sptr = 0;
		596
		597	ctx->stack = stack;
522	}	598	}
523		599
524	static void	600	static void
525	deallocate_stack (Coro__State ctx)	601	deallocate_stack (Coro__State ctx)
526	{	602	{
		603	coro_stack *stack = ctx->stack;
		604
		605	ctx->stack = 0;
		606
		607	if (stack)
		608	{
		609	if (!--stack->refcnt)
		610	{
527	#ifdef HAVE_MMAP	611	#ifdef HAVE_MMAP
528	munmap (ctx->sptr, ctx->ssize);	612	if (stack->ssize > 0 && stack->sptr)
529	#else	613	munmap (stack->sptr, stack->ssize);
530	Safefree (ctx->sptr);	614	else
531	#endif	615	#endif
532	}	616	Safefree (stack->sptr);
533		617
534	/* might go away together with optional SAVE_CCTXT */	618	Safefree (stack);
		619	}
		620	else if (ctx->gencnt == stack->gencnt)
		621	--stack->usecnt;
		622	}
		623	}
		624
535	static void	625	static void
536	setup_coro (void *arg)	626	setup_coro (void *arg)
537	{	627	{
538	/*	628	/*
539	* emulate part of the perl startup here.	629	* emulate part of the perl startup here.
…		…
541	dSP;	631	dSP;
542	Coro__State ctx = (Coro__State)arg;	632	Coro__State ctx = (Coro__State)arg;
543	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	633	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
544		634
545	coro_init_stacks (aTHX);	635	coro_init_stacks (aTHX);
546	JMPENV_BOOTSTRAP;	636	/PL_curcop = 0;/
		637	/PL_in_eval = PL_in_eval;/ /* inherit */
		638	SvREFCNT_dec (GvAV (PL_defgv));
		639	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
		640
547	SPAGAIN;	641	SPAGAIN;
548		642
549	/PL_curcop = 0;/
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = ctx->args;
552
553	if (ctx->sptr)	643	if (ctx->stack)
554	{	644	{
		645	ctx->cursp = 0;
		646
555	PUSHMARK(SP);	647	PUSHMARK(SP);
556	PUTBACK;	648	PUTBACK;
557	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	649	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		650
		651	if (SvTRUE (ERRSV))
		652	croak (NULL);
		653	else
558	croak ("FATAL: CCTXT coroutine returned!");	654	croak ("FATAL: CCTXT coroutine returned!");
559	}	655	}
560	else	656	else
561	{	657	{
562	UNOP myop;	658	UNOP myop;
563		659
…		…
575	* that doesn't matter, though, since it is only	671	* that doesn't matter, though, since it is only
576	* pp_nextstate and we never return...	672	* pp_nextstate and we never return...
577	* ah yes, and I don't care anyways ;)	673	* ah yes, and I don't care anyways ;)
578	*/	674	*/
579	PUTBACK;	675	PUTBACK;
580	PL_op = pp_entersub();	676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
581	SPAGAIN;	677	SPAGAIN;
582		678
583	ENTER; /* necessary e.g. for dounwind */	679	ENTER; /* necessary e.g. for dounwind */
584	}	680	}
585	}	681	}
586		682
		683	static void
		684	continue_coro (void *arg)
		685	{
		686	/*
		687	* this is a _very_ stripped down perl interpreter ;)
		688	*/
		689	Coro__State ctx = (Coro__State)arg;
		690	JMPENV coro_start_env;
		691
		692	PL_top_env = &ctx->start_env;
		693
		694	ctx->cursp = 0;
		695	PL_op = PL_op->op_next;
		696	CALLRUNOPS(aTHX);
		697
		698	abort ();
		699	}
		700
587	STATIC void	701	STATIC void
588	transfer(pTHX_ struct coro prev, struct coro next, int flags)	702	transfer(pTHX_ struct coro prev, struct coro next, int flags)
589	{	703	{
590	dSP;	704	dSTACKLEVEL;
		705	static struct coro *xnext;
591		706
592	if (prev != next)	707	if (prev != next)
593	{	708	{
594	/*	709	xnext = next;
595	* this could be done in newprocess which would lead to	710
596	* extremely elegant and fast (basically just SAVE/LOAD)
597	* code here, but lazy allocation of stacks has also
598	* some virtues and the overhead of the if() is nil.
599	*/
600	if (next->mainstack)	711	if (next->mainstack)
601	{	712	{
602	SAVE (prev, flags);	713	SAVE (prev, flags);
603	LOAD (next);	714	LOAD (next);
604		715
605	/* mark this state as in-use */	716	/* mark this state as in-use */
606	next->mainstack = 0;	717	next->mainstack = 0;
607	next->tmps_ix = -2;	718	next->tmps_ix = -2;
608		719
		720	/* stacklevel changed? if yes, grab the stack for us! */
609	if (flags & TRANSFER_SAVE_CCTXT)	721	if (flags & TRANSFER_SAVE_CCTXT)
610	{	722	{
611	if (!next->ssize)
612	croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
613
614	if (!prev->ssize)	723	if (!prev->stack)
615	prev->ssize = 1; /* mark cctx as valid ;) */	724	allocate_stack (prev, 0);
		725	else if (prev->cursp != stacklevel
		726	&& prev->stack->usecnt > 1)
		727	{
		728	prev->gencnt = ++prev->stack->gencnt;
		729	prev->stack->usecnt = 1;
		730	}
616		731
		732	/* has our stack been invalidated? */
		733	if (next->stack && next->stack->gencnt != next->gencnt)
		734	{
		735	deallocate_stack (next);
		736	allocate_stack (next, 1);
		737	coro_create (&(next->stack->cctx),
		738	continue_coro, (void *)next,
		739	next->stack->sptr, labs (next->stack->ssize));
		740	}
		741
617	coro_transfer (&(prev->cctx), &(next->cctx));	742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		743	/* don't add any code here */
618	}	744	}
619		745
620	}	746	}
621	else if (next->tmps_ix == -2)	747	else if (next->tmps_ix == -2)
622	croak ("tried to transfer to running coroutine");	748	croak ("tried to transfer to running coroutine");
…		…
624	{	750	{
625	SAVE (prev, -1); /* first get rid of the old state */	751	SAVE (prev, -1); /* first get rid of the old state */
626		752
627	if (flags & TRANSFER_SAVE_CCTXT)	753	if (flags & TRANSFER_SAVE_CCTXT)
628	{	754	{
629	if (!next->ssize)	755	if (!prev->stack)
		756	allocate_stack (prev, 0);
		757
		758	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
630	{	759	{
		760	PL_top_env = &next->start_env;
		761
		762	setup_coro (next);
		763
		764	prev->stack->refcnt++;
		765	prev->stack->usecnt++;
		766	next->stack = prev->stack;
		767	next->gencnt = prev->gencnt;
		768	}
		769	else
		770	{
		771	assert (!next->stack);
631	allocate_stack (next);	772	allocate_stack (next, 1);
632	coro_create (&(next->cctx),	773	coro_create (&(next->stack->cctx),
633	setup_coro, (void *)next,	774	setup_coro, (void *)next,
634	next->sptr, next->ssize);	775	next->stack->sptr, labs (next->stack->ssize));
		776	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		777	/* don't add any code here */
635	}	778	}
636
637	if (!prev->ssize)
638	prev->ssize = 1; /* mark cctx as valid ;) */
639
640	coro_transfer (&(prev->cctx), &(next->cctx));
641	}	779	}
642	else	780	else
643	setup_coro (next);	781	setup_coro (next);
644	}	782	}
		783
		784	/*
		785	* xnext is now either prev or next, depending on wether
		786	* we switched the c stack or not. that's why I use a global
		787	* variable, that should become thread-specific at one point.
		788	*/
		789	xnext->cursp = stacklevel;
645	}	790	}
		791
		792	if (coro_mortal)
		793	{
		794	SvREFCNT_dec (coro_mortal);
		795	coro_mortal = 0;
		796	}
		797	}
		798
		799	#define SV_CORO(sv,func) \
		800	do { \
		801	if (SvROK (sv)) \
		802	sv = SvRV (sv); \
		803	\
		804	if (SvTYPE(sv) == SVt_PVHV) \
		805	{ \
		806	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		807	\
		808	if (!he) \
		809	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		810	\
		811	(sv) = SvRV (HeVAL(he)); \
		812	} \
		813	\
		814	/* must also be changed inside Coro::Cont::yield */ \
		815	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		816	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		817	\
		818	} while(0)
		819
		820	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		821
		822	static void
		823	api_transfer(pTHX_ SV prev, SV next, int flags)
		824	{
		825	SV_CORO (prev, "Coro::transfer");
		826	SV_CORO (next, "Coro::transfer");
		827
		828	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		829	}
		830
		831	/ Coro ******************************************************************/
		832
		833	#define PRIO_MAX 3
		834	#define PRIO_HIGH 1
		835	#define PRIO_NORMAL 0
		836	#define PRIO_LOW -1
		837	#define PRIO_IDLE -3
		838	#define PRIO_MIN -4
		839
		840	/* for Coro.pm */
		841	static GV coro_current, coro_idle;
		842	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		843	static int coro_nready;
		844
		845	static void
		846	coro_enq (SV *sv)
		847	{
		848	if (SvTYPE (sv) == SVt_PVHV)
		849	{
		850	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		851	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		852
		853	prio = prio > PRIO_MAX ? PRIO_MAX
		854	: prio < PRIO_MIN ? PRIO_MIN
		855	: prio;
		856
		857	av_push (coro_ready [prio - PRIO_MIN], sv);
		858	coro_nready++;
		859
		860	return;
		861	}
		862
		863	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		864	}
		865
		866	static SV *
		867	coro_deq (int min_prio)
		868	{
		869	int prio = PRIO_MAX - PRIO_MIN;
		870
		871	min_prio -= PRIO_MIN;
		872	if (min_prio < 0)
		873	min_prio = 0;
		874
		875	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		876	if (av_len (coro_ready[prio]) >= 0)
		877	{
		878	coro_nready--;
		879	return av_shift (coro_ready[prio]);
		880	}
		881
		882	return 0;
		883	}
		884
		885	static void
		886	api_ready (SV *coro)
		887	{
		888	if (SvROK (coro))
		889	coro = SvRV (coro);
		890
		891	coro_enq (SvREFCNT_inc (coro));
		892	}
		893
		894	static void
		895	api_schedule (void)
		896	{
		897	SV prev, next;
		898
		899	prev = SvRV (GvSV (coro_current));
		900	next = coro_deq (PRIO_MIN);
		901
		902	if (!next)
		903	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		904
		905	/* free this only after the transfer */
		906	coro_mortal = prev;
		907	SV_CORO (prev, "Coro::schedule");
		908
		909	SvRV (GvSV (coro_current)) = next;
		910
		911	SV_CORO (next, "Coro::schedule");
		912
		913	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		914	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		915	}
		916
		917	static void
		918	api_cede (void)
		919	{
		920	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		921
		922	api_schedule ();
646	}	923	}
647		924
648	MODULE = Coro::State PACKAGE = Coro::State	925	MODULE = Coro::State PACKAGE = Coro::State
649		926
650	PROTOTYPES: ENABLE	927	PROTOTYPES: ENABLE
…		…
662		939
663	if (!padlist_cache)	940	if (!padlist_cache)
664	padlist_cache = newHV ();	941	padlist_cache = newHV ();
665		942
666	main_mainstack = PL_mainstack;	943	main_mainstack = PL_mainstack;
		944
		945	coroapi.ver = CORO_API_VERSION;
		946	coroapi.transfer = api_transfer;
667	}	947	}
668		948
669	Coro::State	949	Coro::State
670	_newprocess(args)	950	_newprocess(args)
671	SV * args	951	SV * args
…		…
674	Coro__State coro;	954	Coro__State coro;
675		955
676	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	956	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
677	croak ("Coro::State::_newprocess expects an arrayref");	957	croak ("Coro::State::_newprocess expects an arrayref");
678		958
679	New (0, coro, 1, struct coro);	959	Newz (0, coro, 1, struct coro);
680		960
681	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	961	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
682	coro->mainstack = 0; /* actual work is done inside transfer */	962	coro->mainstack = 0; /* actual work is done inside transfer */
683	coro->sptr = 0;	963	coro->stack = 0;
684	coro->ssize = 0;	964
		965	/* same as JMPENV_BOOTSTRAP */
		966	/* we might be able to recycle start_env, but safe is safe */
		967	//Zero(&coro->start_env, 1, JMPENV);
		968	coro->start_env.je_ret = -1;
		969	coro->start_env.je_mustcatch = TRUE;
685		970
686	RETVAL = coro;	971	RETVAL = coro;
687	OUTPUT:	972	OUTPUT:
688	RETVAL	973	RETVAL
689		974
690	void	975	void
691	transfer(prev, next, flags = TRANSFER_SAVE_ALL)	976	transfer(prev, next, flags)
692	Coro::State_or_hashref prev	977	SV *prev
693	Coro::State_or_hashref next	978	SV *next
694	int flags	979	int flags
695	PROTOTYPE: @	980	PROTOTYPE: @
696	CODE:	981	CODE:
		982	PUTBACK;
		983	SV_CORO (next, "Coro::transfer");
		984	SV_CORO (prev, "Coro::transfer");
697	transfer (aTHX_ prev, next, flags);	985	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		986	SPAGAIN;
698		987
699	void	988	void
700	DESTROY(coro)	989	DESTROY(coro)
701	Coro::State coro	990	Coro::State coro
702	CODE:	991	CODE:
703		992
704	if (coro->mainstack && coro->mainstack != main_mainstack)	993	if (coro->mainstack && coro->mainstack != main_mainstack)
705	{	994	{
706	struct coro temp;	995	struct coro temp;
707		996
		997	PUTBACK;
708	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	998	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
709	LOAD(aTHX_ coro);	999	LOAD(aTHX_ coro);
		1000	SPAGAIN;
710		1001
711	destroy_stacks (aTHX);	1002	destroy_stacks (aTHX);
712		1003
713	LOAD((&temp)); /* this will get rid of defsv etc.. */	1004	LOAD((&temp)); /* this will get rid of defsv etc.. */
		1005	SPAGAIN;
714		1006
715	coro->mainstack = 0;	1007	coro->mainstack = 0;
716	}	1008	}
717		1009
718	if (coro->sptr)
719	{
720	deallocate_stack (coro);	1010	deallocate_stack (coro);
721	coro->sptr = 0;	1011	SvREFCNT_dec (coro->args);
722	}
723
724	Safefree (coro);	1012	Safefree (coro);
725		1013
726	void	1014	void
727	flush()	1015	flush()
728	CODE:	1016	CODE:
729	#ifdef MAY_FLUSH	1017	#ifdef MAY_FLUSH
730	flush_padlist_cache ();	1018	flush_padlist_cache ();
731	#endif	1019	#endif
732		1020
		1021	void
		1022	_exit(code)
		1023	int code
		1024	PROTOTYPE: $
		1025	CODE:
		1026	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		1027	_exit (code);
		1028	#else
		1029	signal (SIGTERM, SIG_DFL);
		1030	raise (SIGTERM);
		1031	exit (code);
		1032	#endif
		1033
733	MODULE = Coro::State PACKAGE = Coro::Cont	1034	MODULE = Coro::State PACKAGE = Coro::Cont
734		1035
735	# this is slightly dirty	1036	# this is slightly dirty (should expose a c-level api)
736		1037
737	void	1038	void
738	yield(...)	1039	yield(...)
739	PROTOTYPE: @	1040	PROTOTYPE: @
740	CODE:	1041	CODE:
…		…
742	SV *sv;	1043	SV *sv;
743	AV *defav = GvAV (PL_defgv);	1044	AV *defav = GvAV (PL_defgv);
744	struct coro prev, next;	1045	struct coro prev, next;
745		1046
746	if (!returnstk)	1047	if (!returnstk)
747	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1048	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
748		1049
749	/* set up @_ -- ugly */	1050	/* set up @_ -- ugly */
750	av_clear (defav);	1051	av_clear (defav);
751	av_fill (defav, items - 1);	1052	av_fill (defav, items - 1);
752	while (items--)	1053	while (items--)
…		…
758	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1059	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
759	SvREFCNT_dec (sv);	1060	SvREFCNT_dec (sv);
760		1061
761	transfer(aTHX_ prev, next, 0);	1062	transfer(aTHX_ prev, next, 0);
762		1063
		1064	MODULE = Coro::State PACKAGE = Coro
		1065
		1066	# this is slightly dirty (should expose a c-level api)
		1067
		1068	BOOT:
		1069	{
		1070	int i;
		1071	HV *stash = gv_stashpv ("Coro", TRUE);
		1072
		1073	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1074	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1075	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1076	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1077	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1078	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1079
		1080	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1081	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1082
		1083	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1084	coro_ready[i] = newAV ();
		1085
		1086	{
		1087	SV *sv = perl_get_sv("Coro::API", 1);
		1088
		1089	coroapi.schedule = api_schedule;
		1090	coroapi.cede = api_cede;
		1091	coroapi.ready = api_ready;
		1092	coroapi.nready = &coro_nready;
		1093	coroapi.current = coro_current;
		1094
		1095	GCoroAPI = &coroapi;
		1096	sv_setiv(sv, (IV)&coroapi);
		1097	SvREADONLY_on(sv);
		1098	}
		1099	}
		1100
		1101	void
		1102	ready(self)
		1103	SV * self
		1104	PROTOTYPE: $
		1105	CODE:
		1106	api_ready (self);
		1107
		1108	int
		1109	nready(...)
		1110	PROTOTYPE:
		1111	CODE:
		1112	RETVAL = coro_nready;
		1113	OUTPUT:
		1114	RETVAL
		1115
		1116	void
		1117	schedule(...)
		1118	PROTOTYPE:
		1119	CODE:
		1120	api_schedule ();
		1121
		1122	void
		1123	cede(...)
		1124	PROTOTYPE:
		1125	CODE:
		1126	api_cede ();
		1127

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Comparing Coro/Coro/State.xs (file contents): Revision 1.14 by root, Mon Jul 23 23:48:05 2001 UTC vs. Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.14 by root, Mon Jul 23 23:48:05 2001 UTC vs.
Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC