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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.17 by root, Wed Jul 25 14:01:46 2001 UTC vs.
Revision 1.47 by pcg, Sat Nov 15 03:53:10 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>
10	# ifndef MAP_ANON
11	# ifdef MAP_ANONYMOUS	35	# ifndef MAP_ANONYMOUS
12	# define MAP_ANON MAP_ANONYMOUS	36	# ifdef MAP_ANON
		37	# define MAP_ANONYMOUS MAP_ANON
13	# else	38	# else
14	# undef HAVE_MMAP	39	# undef HAVE_MMAP
15	# endif	40	# endif
16	# endif	41	# endif
17	#endif	42	#endif
18		43
19	#define MAY_FLUSH /* increases codesize */	44	#define MAY_FLUSH /* increases codesize and is rarely used */
20
21	/* perl-related */
22	#define TRANSFER_SAVE_DEFAV 0x00000001
23	#define TRANSFER_SAVE_DEFSV 0x00000002
24	#define TRANSFER_SAVE_ERRSV 0x00000004
25	/* c-related */
26	#define TRANSFER_SAVE_CCTXT 0x00000008
27	#ifdef CORO_LAZY_STACK
28	# define TRANSFER_LAZY_STACK 0x00000010
29	#else
30	# define TRANSFER_LAZY_STACK 0x00000000
31	#endif
32
33	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV\|TRANSFER_SAVE_DEFSV \
34	\|TRANSFER_SAVE_ERRSV\|TRANSFER_SAVE_CCTXT)
35		45
36	#define SUB_INIT "Coro::State::initialize"	46	#define SUB_INIT "Coro::State::initialize"
37	#define UCORO_STATE "_coro_state"	47	#define UCORO_STATE "_coro_state"
38		48
39	/* The next macro should delcare a variable stacklevel that contains and approximation	49	/* The next macro should declare a variable stacklevel that contains and approximation
40	* to the current C stack pointer. It's property is that it changes with each call	50	* to the current C stack pointer. Its property is that it changes with each call
41	* and should be unique. */	51	* and should be unique. */
42	#define dSTACKLEVEL void *stacklevel = &stacklevel	52	#define dSTACKLEVEL void *stacklevel = &stacklevel
43		53
		54	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		55
44	#define labs(l) ((l) >= 0 ? (l) : -(l))	56	#define labs(l) ((l) >= 0 ? (l) : -(l))
		57
		58	#include "CoroAPI.h"
		59
		60	static struct CoroAPI coroapi;
45		61
46	/* this is actually not only the c stack but also c registers etc... */	62	/* this is actually not only the c stack but also c registers etc... */
47	typedef struct {	63	typedef struct {
48	int refcnt; /* pointer reference counter */	64	int refcnt; /* pointer reference counter */
49	int usecnt; /* shared by how many coroutines */	65	int usecnt; /* shared by how many coroutines */
53		69
54	void *sptr;	70	void *sptr;
55	long ssize; /* positive == mmap, otherwise malloc */	71	long ssize; /* positive == mmap, otherwise malloc */
56	} coro_stack;	72	} coro_stack;
57		73
58	static coro_stack main_stack = { 1, 0, 0 };
59
60	struct coro {	74	struct coro {
		75	/* the top-level JMPENV for each coroutine, needed to catch dies. */
		76	JMPENV start_env;
		77
61	/* the optional C context */	78	/* the optional C context */
62	coro_stack *stack;	79	coro_stack *stack;
63	void *cursp;	80	void *cursp;
64	int gencnt;	81	int gencnt;
65		82
…		…
68	SV *defsv;	85	SV *defsv;
69	SV *errsv;	86	SV *errsv;
70		87
71	/* saved global state not related to stacks */	88	/* saved global state not related to stacks */
72	U8 dowarn;	89	U8 dowarn;
		90	I32 in_eval;
73		91
74	/* the stacks and related info (callchain etc..) */	92	/* the stacks and related info (callchain etc..) */
75	PERL_SI *curstackinfo;	93	PERL_SI *curstackinfo;
76	AV *curstack;	94	AV *curstack;
77	AV *mainstack;	95	AV *mainstack;
78	SV **stack_sp;	96	SV **stack_sp;
79	OP *op;	97	OP *op;
80	SV **curpad;	98	SV **curpad;
		99	AV *comppad;
81	SV **stack_base;	100	SV **stack_base;
82	SV **stack_max;	101	SV **stack_max;
83	SV **tmps_stack;	102	SV **tmps_stack;
84	I32 tmps_floor;	103	I32 tmps_floor;
85	I32 tmps_ix;	104	I32 tmps_ix;
…		…
95	I32 savestack_max;	114	I32 savestack_max;
96	OP **retstack;	115	OP **retstack;
97	I32 retstack_ix;	116	I32 retstack_ix;
98	I32 retstack_max;	117	I32 retstack_max;
99	COP *curcop;	118	COP *curcop;
100	JMPENV start_env;
101	JMPENV *top_env;	119	JMPENV *top_env;
102		120
103	/* data associated with this coroutine (initial args) */	121	/* data associated with this coroutine (initial args) */
104	AV *args;	122	AV *args;
105	};	123	};
…		…
110	static AV main_mainstack; / used to differentiate between $main and others */	128	static AV main_mainstack; / used to differentiate between $main and others */
111	static HV *coro_state_stash;	129	static HV *coro_state_stash;
112	static SV *ucoro_state_sv;	130	static SV *ucoro_state_sv;
113	static U32 ucoro_state_hash;	131	static U32 ucoro_state_hash;
114	static HV *padlist_cache;	132	static HV *padlist_cache;
		133	static SV coro_mortal; / will be freed after next transfer */
115		134
116	/* mostly copied from op.c:cv_clone2 */	135	/* mostly copied from op.c:cv_clone2 */
117	STATIC AV *	136	STATIC AV *
118	clone_padlist (AV *protopadlist)	137	clone_padlist (AV *protopadlist)
119	{	138	{
…		…
206		225
207	return newpadlist;	226	return newpadlist;
208	}	227	}
209		228
210	#ifdef MAY_FLUSH	229	#ifdef MAY_FLUSH
211	STATIC AV *	230	STATIC void
212	free_padlist (AV *padlist)	231	free_padlist (AV *padlist)
213	{	232	{
214	/* may be during global destruction */	233	/* may be during global destruction */
215	if (SvREFCNT(padlist))	234	if (SvREFCNT(padlist))
216	{	235	{
…		…
281	#endif	300	#endif
282		301
283	#define SB do {	302	#define SB do {
284	#define SE } while (0)	303	#define SE } while (0)
285		304
286	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	305	#define LOAD(state) load_state(aTHX_ (state));
287	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
288		307
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
290		309
291	static void	310	static void
292	load_state(pTHX_ Coro__State c)	311	load_state(pTHX_ Coro__State c)
293	{	312	{
294	PL_dowarn = c->dowarn;	313	PL_dowarn = c->dowarn;
		314	PL_in_eval = c->in_eval;
295		315
296	PL_curstackinfo = c->curstackinfo;	316	PL_curstackinfo = c->curstackinfo;
297	PL_curstack = c->curstack;	317	PL_curstack = c->curstack;
298	PL_mainstack = c->mainstack;	318	PL_mainstack = c->mainstack;
299	PL_stack_sp = c->stack_sp;	319	PL_stack_sp = c->stack_sp;
300	PL_op = c->op;	320	PL_op = c->op;
301	PL_curpad = c->curpad;	321	PL_curpad = c->curpad;
		322	PL_comppad = c->comppad;
302	PL_stack_base = c->stack_base;	323	PL_stack_base = c->stack_base;
303	PL_stack_max = c->stack_max;	324	PL_stack_max = c->stack_max;
304	PL_tmps_stack = c->tmps_stack;	325	PL_tmps_stack = c->tmps_stack;
305	PL_tmps_floor = c->tmps_floor;	326	PL_tmps_floor = c->tmps_floor;
306	PL_tmps_ix = c->tmps_ix;	327	PL_tmps_ix = c->tmps_ix;
…		…
316	PL_savestack_max = c->savestack_max;	337	PL_savestack_max = c->savestack_max;
317	PL_retstack = c->retstack;	338	PL_retstack = c->retstack;
318	PL_retstack_ix = c->retstack_ix;	339	PL_retstack_ix = c->retstack_ix;
319	PL_retstack_max = c->retstack_max;	340	PL_retstack_max = c->retstack_max;
320	PL_curcop = c->curcop;	341	PL_curcop = c->curcop;
321	PL_start_env = c->start_env;
322	PL_top_env = c->top_env;	342	PL_top_env = c->top_env;
323		343
324	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
325	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
326	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
366		386
367	PUSHs (Nullsv);	387	PUSHs (Nullsv);
368	/* this loop was inspired by pp_caller */	388	/* this loop was inspired by pp_caller */
369	for (;;)	389	for (;;)
370	{	390	{
371	do	391	while (cxix >= 0)
372	{	392	{
373	PERL_CONTEXT *cx = &ccstk[cxix--];	393	PERL_CONTEXT *cx = &ccstk[cxix--];
374		394
375	if (CxTYPE(cx) == CXt_SUB)	395	if (CxTYPE(cx) == CXt_SUB)
376	{	396	{
…		…
395	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
396		416
397	get_padlist (cv); /* this is a monster */	417	get_padlist (cv); /* this is a monster */
398	}	418	}
399	}	419	}
		420	#ifdef CXt_FORMAT
400	else if (CxTYPE(cx) == CXt_FORMAT)	421	else if (CxTYPE(cx) == CXt_FORMAT)
401	{	422	{
402	/* I never used formats, so how should I know how these are implemented? */	423	/* I never used formats, so how should I know how these are implemented? */
403	/* my bold guess is as a simple, plain sub... */	424	/* my bold guess is as a simple, plain sub... */
404	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	425	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405	}	426	}
		427	#endif
406	}	428	}
407	while (cxix >= 0);
408		429
409	if (top_si->si_type == PERLSI_MAIN)	430	if (top_si->si_type == PERLSI_MAIN)
410	break;	431	break;
411		432
412	top_si = top_si->si_prev;	433	top_si = top_si->si_prev;
…		…
419		440
420	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	441	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
421	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
422	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
423		444
424	/* I have not the slightest idea of why av_reify is necessary */
425	/* but if it's missing the defav contents magically get replaced sometimes */
426	if (c->defav)
427	av_reify (c->defav);
428
429	c->dowarn = PL_dowarn;	445	c->dowarn = PL_dowarn;
		446	c->in_eval = PL_in_eval;
430		447
431	c->curstackinfo = PL_curstackinfo;	448	c->curstackinfo = PL_curstackinfo;
432	c->curstack = PL_curstack;	449	c->curstack = PL_curstack;
433	c->mainstack = PL_mainstack;	450	c->mainstack = PL_mainstack;
434	c->stack_sp = PL_stack_sp;	451	c->stack_sp = PL_stack_sp;
435	c->op = PL_op;	452	c->op = PL_op;
436	c->curpad = PL_curpad;	453	c->curpad = PL_curpad;
		454	c->comppad = PL_comppad;
437	c->stack_base = PL_stack_base;	455	c->stack_base = PL_stack_base;
438	c->stack_max = PL_stack_max;	456	c->stack_max = PL_stack_max;
439	c->tmps_stack = PL_tmps_stack;	457	c->tmps_stack = PL_tmps_stack;
440	c->tmps_floor = PL_tmps_floor;	458	c->tmps_floor = PL_tmps_floor;
441	c->tmps_ix = PL_tmps_ix;	459	c->tmps_ix = PL_tmps_ix;
…		…
451	c->savestack_max = PL_savestack_max;	469	c->savestack_max = PL_savestack_max;
452	c->retstack = PL_retstack;	470	c->retstack = PL_retstack;
453	c->retstack_ix = PL_retstack_ix;	471	c->retstack_ix = PL_retstack_ix;
454	c->retstack_max = PL_retstack_max;	472	c->retstack_max = PL_retstack_max;
455	c->curcop = PL_curcop;	473	c->curcop = PL_curcop;
456	c->start_env = PL_start_env;
457	c->top_env = PL_top_env;	474	c->top_env = PL_top_env;
458	}	475	}
459		476
460	/*	477	/*
461	* allocate various perl stacks. This is an exact copy	478	* allocate various perl stacks. This is an exact copy
…		…
482		499
483	New(54,PL_markstack,16,I32);	500	New(54,PL_markstack,16,I32);
484	PL_markstack_ptr = PL_markstack;	501	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	502	PL_markstack_max = PL_markstack + 16;
486		503
		504	#ifdef SET_MARK_OFFSET
487	SET_MARK_OFFSET;	505	SET_MARK_OFFSET;
		506	#endif
488		507
489	New(54,PL_scopestack,16,I32);	508	New(54,PL_scopestack,16,I32);
490	PL_scopestack_ix = 0;	509	PL_scopestack_ix = 0;
491	PL_scopestack_max = 16;	510	PL_scopestack_max = 16;
492		511
…		…
504	* still there is a memleak of 128 bytes...	523	* still there is a memleak of 128 bytes...
505	*/	524	*/
506	STATIC void	525	STATIC void
507	destroy_stacks(pTHX)	526	destroy_stacks(pTHX)
508	{	527	{
		528	if (!IN_DESTRUCT)
		529	{
509	/* is this ugly, I ask? */	530	/* is this ugly, I ask? */
510	while (PL_scopestack_ix)	531	while (PL_scopestack_ix)
511	LEAVE;	532	LEAVE;
512		533
513	/* sure it is, but more important: is it correct?? :/ */	534	/* sure it is, but more important: is it correct?? :/ */
514	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	535	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515	FREETMPS;	536	FREETMPS;
		537	}
516		538
517	while (PL_curstackinfo->si_next)	539	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	540	PL_curstackinfo = PL_curstackinfo->si_next;
519		541
520	while (PL_curstackinfo)	542	while (PL_curstackinfo)
…		…
525	dSP;	547	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */	549	PUTBACK; /* possibly superfluous */
528	}	550	}
529		551
		552	if (!IN_DESTRUCT)
		553	{
530	dounwind(-1);	554	dounwind(-1);
531
532	SvREFCNT_dec(PL_curstackinfo->si_stack);	555	SvREFCNT_dec(PL_curstackinfo->si_stack);
		556	}
		557
533	Safefree(PL_curstackinfo->si_cxstack);	558	Safefree(PL_curstackinfo->si_cxstack);
534	Safefree(PL_curstackinfo);	559	Safefree(PL_curstackinfo);
535	PL_curstackinfo = p;	560	PL_curstackinfo = p;
536	}	561	}
537		562
…		…
552	stack->refcnt = 1;	577	stack->refcnt = 1;
553	stack->usecnt = 1;	578	stack->usecnt = 1;
554	stack->gencnt = ctx->gencnt = 0;	579	stack->gencnt = ctx->gencnt = 0;
555	if (alloc)	580	if (alloc)
556	{	581	{
557	#ifdef HAVE_MMAP	582	#if HAVE_MMAP
558	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */	583	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
559	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);	584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
560	if (stack->sptr == (void *)-1)	585	if (stack->sptr == (void *)-1)
561	#endif	586	#endif
562	{	587	{
563	/FIXME//D//* reasonable stack size! */	588	/FIXME//D//* reasonable stack size! */
564	stack->ssize = -4096 * sizeof (long);	589	stack->ssize = -4096 * sizeof (long);
…		…
584	{	609	{
585	#ifdef HAVE_MMAP	610	#ifdef HAVE_MMAP
586	if (stack->ssize > 0 && stack->sptr)	611	if (stack->ssize > 0 && stack->sptr)
587	munmap (stack->sptr, stack->ssize);	612	munmap (stack->sptr, stack->ssize);
588	else	613	else
589	#else	614	#endif
590	Safefree (stack->sptr);	615	Safefree (stack->sptr);
591	#endif	616
592	Safefree (stack);	617	Safefree (stack);
593	}	618	}
594	else if (ctx->gencnt == stack->gencnt)	619	else if (ctx->gencnt == stack->gencnt)
595	--stack->usecnt;	620	--stack->usecnt;
596	}	621	}
…		…
605	dSP;	630	dSP;
606	Coro__State ctx = (Coro__State)arg;	631	Coro__State ctx = (Coro__State)arg;
607	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	632	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
608		633
609	coro_init_stacks (aTHX);	634	coro_init_stacks (aTHX);
610	JMPENV_BOOTSTRAP;	635	/PL_curcop = 0;/
		636	/PL_in_eval = PL_in_eval;/ /* inherit */
		637	SvREFCNT_dec (GvAV (PL_defgv));
		638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
		639
611	SPAGAIN;	640	SPAGAIN;
612
613	/PL_curcop = 0;/
614	SvREFCNT_dec (GvAV (PL_defgv));
615	GvAV (PL_defgv) = ctx->args;
616		641
617	if (ctx->stack)	642	if (ctx->stack)
618	{	643	{
619	ctx->cursp = 0;	644	ctx->cursp = 0;
620		645
621	PUSHMARK(SP);	646	PUSHMARK(SP);
622	PUTBACK;	647	PUTBACK;
623	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	648	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		649
		650	if (SvTRUE (ERRSV))
		651	croak (NULL);
		652	else
624	croak ("FATAL: CCTXT coroutine returned!");	653	croak ("FATAL: CCTXT coroutine returned!");
625	}	654	}
626	else	655	else
627	{	656	{
628	UNOP myop;	657	UNOP myop;
629		658
…		…
641	* that doesn't matter, though, since it is only	670	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...	671	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)	672	* ah yes, and I don't care anyways ;)
644	*/	673	*/
645	PUTBACK;	674	PUTBACK;
646	PL_op = pp_entersub();	675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647	SPAGAIN;	676	SPAGAIN;
648		677
649	ENTER; /* necessary e.g. for dounwind */	678	ENTER; /* necessary e.g. for dounwind */
650	}	679	}
651	}	680	}
…		…
655	{	684	{
656	/*	685	/*
657	* this is a _very_ stripped down perl interpreter ;)	686	* this is a _very_ stripped down perl interpreter ;)
658	*/	687	*/
659	Coro__State ctx = (Coro__State)arg;	688	Coro__State ctx = (Coro__State)arg;
		689	JMPENV coro_start_env;
		690
		691	PL_top_env = &ctx->start_env;
660		692
661	ctx->cursp = 0;	693	ctx->cursp = 0;
662	PL_op = PL_op->op_next;	694	PL_op = PL_op->op_next;
663	CALLRUNOPS(aTHX);	695	CALLRUNOPS(aTHX);
664	/NORETURN/	696
665	abort ();	697	abort ();
666	}	698	}
667		699
668	STATIC void	700	STATIC void
669	transfer(pTHX_ struct coro prev, struct coro next, int flags)	701	transfer(pTHX_ struct coro prev, struct coro next, int flags)
670	{	702	{
671	dSP;
672	dSTACKLEVEL;	703	dSTACKLEVEL;
		704	static struct coro *xnext;
673		705
674	if (prev != next)	706	if (prev != next)
675	{	707	{
		708	xnext = next;
		709
676	if (next->mainstack)	710	if (next->mainstack)
677	{	711	{
678	SAVE (prev, flags);	712	SAVE (prev, flags);
679	LOAD (next);	713	LOAD (next);
680		714
…		…
703	continue_coro, (void *)next,	737	continue_coro, (void *)next,
704	next->stack->sptr, labs (next->stack->ssize));	738	next->stack->sptr, labs (next->stack->ssize));
705	}	739	}
706		740
707	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	741	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		742	/* don't add any code here */
708	}	743	}
709		744
710	}	745	}
711	else if (next->tmps_ix == -2)	746	else if (next->tmps_ix == -2)
712	croak ("tried to transfer to running coroutine");	747	croak ("tried to transfer to running coroutine");
…		…
719	if (!prev->stack)	754	if (!prev->stack)
720	allocate_stack (prev, 0);	755	allocate_stack (prev, 0);
721		756
722	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)	757	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
723	{	758	{
		759	PL_top_env = &next->start_env;
		760
724	setup_coro (next);	761	setup_coro (next);
725		762
726	prev->stack->refcnt++;	763	prev->stack->refcnt++;
727	prev->stack->usecnt++;	764	prev->stack->usecnt++;
728	next->stack = prev->stack;	765	next->stack = prev->stack;
729	next->gencnt = prev->gencnt;	766	next->gencnt = prev->gencnt;
730	}	767	}
731	else	768	else
732	{	769	{
		770	assert (!next->stack);
733	allocate_stack (next, 1);	771	allocate_stack (next, 1);
734	coro_create (&(next->stack->cctx),	772	coro_create (&(next->stack->cctx),
735	setup_coro, (void *)next,	773	setup_coro, (void *)next,
736	next->stack->sptr, labs (next->stack->ssize));	774	next->stack->sptr, labs (next->stack->ssize));
737	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	775	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		776	/* don't add any code here */
738	}	777	}
739	}	778	}
740	else	779	else
741	setup_coro (next);	780	setup_coro (next);
742	}	781	}
		782
		783	/*
		784	* xnext is now either prev or next, depending on wether
		785	* we switched the c stack or not. that's why I use a global
		786	* variable, that should become thread-specific at one point.
		787	*/
		788	xnext->cursp = stacklevel;
743	}	789	}
744		790
745	next->cursp = stacklevel;	791	if (coro_mortal)
		792	{
		793	SvREFCNT_dec (coro_mortal);
		794	coro_mortal = 0;
		795	}
		796	}
		797
		798	#define SV_CORO(sv,func) \
		799	do { \
		800	if (SvROK (sv)) \
		801	sv = SvRV (sv); \
		802	\
		803	if (SvTYPE(sv) == SVt_PVHV) \
		804	{ \
		805	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		806	\
		807	if (!he) \
		808	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		809	\
		810	(sv) = SvRV (HeVAL(he)); \
		811	} \
		812	\
		813	/* must also be changed inside Coro::Cont::yield */ \
		814	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		815	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		816	\
		817	} while(0)
		818
		819	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		820
		821	static void
		822	api_transfer(pTHX_ SV prev, SV next, int flags)
		823	{
		824	SV_CORO (prev, "Coro::transfer");
		825	SV_CORO (next, "Coro::transfer");
		826
		827	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		828	}
		829
		830	/ Coro ******************************************************************/
		831
		832	#define PRIO_MAX 3
		833	#define PRIO_HIGH 1
		834	#define PRIO_NORMAL 0
		835	#define PRIO_LOW -1
		836	#define PRIO_IDLE -3
		837	#define PRIO_MIN -4
		838
		839	/* for Coro.pm */
		840	static GV coro_current, coro_idle;
		841	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		842	static int coro_nready;
		843
		844	static void
		845	coro_enq (SV *sv)
		846	{
		847	if (SvTYPE (sv) == SVt_PVHV)
		848	{
		849	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		850	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		851
		852	prio = prio > PRIO_MAX ? PRIO_MAX
		853	: prio < PRIO_MIN ? PRIO_MIN
		854	: prio;
		855
		856	av_push (coro_ready [prio - PRIO_MIN], sv);
		857	coro_nready++;
		858
		859	return;
		860	}
		861
		862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		863	}
		864
		865	static SV *
		866	coro_deq (int min_prio)
		867	{
		868	int prio = PRIO_MAX - PRIO_MIN;
		869
		870	min_prio -= PRIO_MIN;
		871	if (min_prio < 0)
		872	min_prio = 0;
		873
		874	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		875	if (av_len (coro_ready[prio]) >= 0)
		876	{
		877	coro_nready--;
		878	return av_shift (coro_ready[prio]);
		879	}
		880
		881	return 0;
		882	}
		883
		884	static void
		885	api_ready (SV *coro)
		886	{
		887	if (SvROK (coro))
		888	coro = SvRV (coro);
		889
		890	coro_enq (SvREFCNT_inc (coro));
		891	}
		892
		893	static void
		894	api_schedule (void)
		895	{
		896	SV prev, next;
		897
		898	prev = SvRV (GvSV (coro_current));
		899	next = coro_deq (PRIO_MIN);
		900
		901	if (!next)
		902	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		903
		904	/* free this only after the transfer */
		905	coro_mortal = prev;
		906	SV_CORO (prev, "Coro::schedule");
		907
		908	SvRV (GvSV (coro_current)) = next;
		909
		910	SV_CORO (next, "Coro::schedule");
		911
		912	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		913	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		914	}
		915
		916	static void
		917	api_cede (void)
		918	{
		919	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		920
		921	api_schedule ();
746	}	922	}
747		923
748	MODULE = Coro::State PACKAGE = Coro::State	924	MODULE = Coro::State PACKAGE = Coro::State
749		925
750	PROTOTYPES: ENABLE	926	PROTOTYPES: ENABLE
…		…
762		938
763	if (!padlist_cache)	939	if (!padlist_cache)
764	padlist_cache = newHV ();	940	padlist_cache = newHV ();
765		941
766	main_mainstack = PL_mainstack;	942	main_mainstack = PL_mainstack;
		943
		944	coroapi.ver = CORO_API_VERSION;
		945	coroapi.transfer = api_transfer;
767	}	946	}
768		947
769	Coro::State	948	Coro::State
770	_newprocess(args)	949	_newprocess(args)
771	SV * args	950	SV * args
…		…
774	Coro__State coro;	953	Coro__State coro;
775		954
776	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	955	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
777	croak ("Coro::State::_newprocess expects an arrayref");	956	croak ("Coro::State::_newprocess expects an arrayref");
778		957
779	New (0, coro, 1, struct coro);	958	Newz (0, coro, 1, struct coro);
780		959
781	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	960	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
782	coro->mainstack = 0; /* actual work is done inside transfer */	961	coro->mainstack = 0; /* actual work is done inside transfer */
783	coro->stack = 0;	962	coro->stack = 0;
784		963
		964	/* same as JMPENV_BOOTSTRAP */
		965	/* we might be able to recycle start_env, but safe is safe */
		966	//Zero(&coro->start_env, 1, JMPENV);
		967	coro->start_env.je_ret = -1;
		968	coro->start_env.je_mustcatch = TRUE;
		969
785	RETVAL = coro;	970	RETVAL = coro;
786	OUTPUT:	971	OUTPUT:
787	RETVAL	972	RETVAL
788		973
789	void	974	void
790	transfer(prev, next, flags = TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK)	975	transfer(prev, next, flags)
791	Coro::State_or_hashref prev	976	SV *prev
792	Coro::State_or_hashref next	977	SV *next
793	int flags	978	int flags
794	PROTOTYPE: @	979	PROTOTYPE: @
795	CODE:	980	CODE:
		981	PUTBACK;
		982	SV_CORO (next, "Coro::transfer");
		983	SV_CORO (prev, "Coro::transfer");
796	transfer (aTHX_ prev, next, flags);	984	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		985	SPAGAIN;
797		986
798	void	987	void
799	DESTROY(coro)	988	DESTROY(coro)
800	Coro::State coro	989	Coro::State coro
801	CODE:	990	CODE:
802		991
803	if (coro->mainstack && coro->mainstack != main_mainstack)	992	if (coro->mainstack && coro->mainstack != main_mainstack)
804	{	993	{
805	struct coro temp;	994	struct coro temp;
806		995
		996	PUTBACK;
807	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	997	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
808	LOAD(aTHX_ coro);	998	LOAD(aTHX_ coro);
		999	SPAGAIN;
809		1000
810	destroy_stacks (aTHX);	1001	destroy_stacks (aTHX);
811		1002
812	LOAD((&temp)); /* this will get rid of defsv etc.. */	1003	LOAD((&temp)); /* this will get rid of defsv etc.. */
		1004	SPAGAIN;
813		1005
814	coro->mainstack = 0;	1006	coro->mainstack = 0;
815	}	1007	}
816		1008
817	deallocate_stack (coro);	1009	deallocate_stack (coro);
818		1010	SvREFCNT_dec (coro->args);
819	Safefree (coro);	1011	Safefree (coro);
820		1012
821	void	1013	void
822	flush()	1014	flush()
823	CODE:	1015	CODE:
824	#ifdef MAY_FLUSH	1016	#ifdef MAY_FLUSH
825	flush_padlist_cache ();	1017	flush_padlist_cache ();
826	#endif	1018	#endif
827		1019
		1020	void
		1021	_exit(code)
		1022	int code
		1023	PROTOTYPE: $
		1024	CODE:
		1025	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		1026	_exit (code);
		1027	#else
		1028	signal (SIGTERM, SIG_DFL);
		1029	raise (SIGTERM);
		1030	exit (code);
		1031	#endif
		1032
828	MODULE = Coro::State PACKAGE = Coro::Cont	1033	MODULE = Coro::State PACKAGE = Coro::Cont
829		1034
830	# this is slightly dirty	1035	# this is slightly dirty (should expose a c-level api)
831		1036
832	void	1037	void
833	yield(...)	1038	yield(...)
834	PROTOTYPE: @	1039	PROTOTYPE: @
835	CODE:	1040	CODE:
…		…
837	SV *sv;	1042	SV *sv;
838	AV *defav = GvAV (PL_defgv);	1043	AV *defav = GvAV (PL_defgv);
839	struct coro prev, next;	1044	struct coro prev, next;
840		1045
841	if (!returnstk)	1046	if (!returnstk)
842	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1047	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
843		1048
844	/* set up @_ -- ugly */	1049	/* set up @_ -- ugly */
845	av_clear (defav);	1050	av_clear (defav);
846	av_fill (defav, items - 1);	1051	av_fill (defav, items - 1);
847	while (items--)	1052	while (items--)
…		…
853	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1058	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
854	SvREFCNT_dec (sv);	1059	SvREFCNT_dec (sv);
855		1060
856	transfer(aTHX_ prev, next, 0);	1061	transfer(aTHX_ prev, next, 0);
857		1062
		1063	MODULE = Coro::State PACKAGE = Coro
		1064
		1065	# this is slightly dirty (should expose a c-level api)
		1066
		1067	BOOT:
		1068	{
		1069	int i;
		1070	HV *stash = gv_stashpv ("Coro", TRUE);
		1071
		1072	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1073	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1074	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1075	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1076	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1077	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1078
		1079	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1080	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1081
		1082	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1083	coro_ready[i] = newAV ();
		1084
		1085	{
		1086	SV *sv = perl_get_sv("Coro::API", 1);
		1087
		1088	coroapi.schedule = api_schedule;
		1089	coroapi.cede = api_cede;
		1090	coroapi.ready = api_ready;
		1091	coroapi.nready = &coro_nready;
		1092	coroapi.current = coro_current;
		1093
		1094	GCoroAPI = &coroapi;
		1095	sv_setiv(sv, (IV)&coroapi);
		1096	SvREADONLY_on(sv);
		1097	}
		1098	}
		1099
		1100	void
		1101	ready(self)
		1102	SV * self
		1103	PROTOTYPE: $
		1104	CODE:
		1105	api_ready (self);
		1106
		1107	int
		1108	nready(...)
		1109	PROTOTYPE:
		1110	CODE:
		1111	RETVAL = coro_nready;
		1112	OUTPUT:
		1113	RETVAL
		1114
		1115	void
		1116	schedule(...)
		1117	PROTOTYPE:
		1118	CODE:
		1119	api_schedule ();
		1120
		1121	void
		1122	cede(...)
		1123	PROTOTYPE:
		1124	CODE:
		1125	api_cede ();
		1126

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Comparing Coro/Coro/State.xs (file contents): Revision 1.17 by root, Wed Jul 25 14:01:46 2001 UTC vs. Revision 1.47 by pcg, Sat Nov 15 03:53:10 2003 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.17 by root, Wed Jul 25 14:01:46 2001 UTC vs.
Revision 1.47 by pcg, Sat Nov 15 03:53:10 2003 UTC