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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.18 by root, Thu Jul 26 03:46:15 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 */
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	struct coro {	74	struct coro {
		75	/* the top-level JMPENV for each coroutine, needed to catch dies. */
		76	JMPENV start_env;
		77
59	/* the optional C context */	78	/* the optional C context */
60	coro_stack *stack;	79	coro_stack *stack;
61	void *cursp;	80	void *cursp;
62	int gencnt;	81	int gencnt;
63		82
…		…
66	SV *defsv;	85	SV *defsv;
67	SV *errsv;	86	SV *errsv;
68		87
69	/* saved global state not related to stacks */	88	/* saved global state not related to stacks */
70	U8 dowarn;	89	U8 dowarn;
		90	I32 in_eval;
71		91
72	/* the stacks and related info (callchain etc..) */	92	/* the stacks and related info (callchain etc..) */
73	PERL_SI *curstackinfo;	93	PERL_SI *curstackinfo;
74	AV *curstack;	94	AV *curstack;
75	AV *mainstack;	95	AV *mainstack;
76	SV **stack_sp;	96	SV **stack_sp;
77	OP *op;	97	OP *op;
78	SV **curpad;	98	SV **curpad;
		99	AV *comppad;
79	SV **stack_base;	100	SV **stack_base;
80	SV **stack_max;	101	SV **stack_max;
81	SV **tmps_stack;	102	SV **tmps_stack;
82	I32 tmps_floor;	103	I32 tmps_floor;
83	I32 tmps_ix;	104	I32 tmps_ix;
…		…
93	I32 savestack_max;	114	I32 savestack_max;
94	OP **retstack;	115	OP **retstack;
95	I32 retstack_ix;	116	I32 retstack_ix;
96	I32 retstack_max;	117	I32 retstack_max;
97	COP *curcop;	118	COP *curcop;
98	JMPENV start_env;
99	JMPENV *top_env;	119	JMPENV *top_env;
100		120
101	/* data associated with this coroutine (initial args) */	121	/* data associated with this coroutine (initial args) */
102	AV *args;	122	AV *args;
103	};	123	};
…		…
108	static AV main_mainstack; / used to differentiate between $main and others */	128	static AV main_mainstack; / used to differentiate between $main and others */
109	static HV *coro_state_stash;	129	static HV *coro_state_stash;
110	static SV *ucoro_state_sv;	130	static SV *ucoro_state_sv;
111	static U32 ucoro_state_hash;	131	static U32 ucoro_state_hash;
112	static HV *padlist_cache;	132	static HV *padlist_cache;
		133	static SV coro_mortal; / will be freed after next transfer */
113		134
114	/* mostly copied from op.c:cv_clone2 */	135	/* mostly copied from op.c:cv_clone2 */
115	STATIC AV *	136	STATIC AV *
116	clone_padlist (AV *protopadlist)	137	clone_padlist (AV *protopadlist)
117	{	138	{
…		…
204		225
205	return newpadlist;	226	return newpadlist;
206	}	227	}
207		228
208	#ifdef MAY_FLUSH	229	#ifdef MAY_FLUSH
209	STATIC AV *	230	STATIC void
210	free_padlist (AV *padlist)	231	free_padlist (AV *padlist)
211	{	232	{
212	/* may be during global destruction */	233	/* may be during global destruction */
213	if (SvREFCNT(padlist))	234	if (SvREFCNT(padlist))
214	{	235	{
…		…
279	#endif	300	#endif
280		301
281	#define SB do {	302	#define SB do {
282	#define SE } while (0)	303	#define SE } while (0)
283		304
284	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	305	#define LOAD(state) load_state(aTHX_ (state));
285	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
286		307
287	#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
288		309
289	static void	310	static void
290	load_state(pTHX_ Coro__State c)	311	load_state(pTHX_ Coro__State c)
291	{	312	{
292	PL_dowarn = c->dowarn;	313	PL_dowarn = c->dowarn;
		314	PL_in_eval = c->in_eval;
293		315
294	PL_curstackinfo = c->curstackinfo;	316	PL_curstackinfo = c->curstackinfo;
295	PL_curstack = c->curstack;	317	PL_curstack = c->curstack;
296	PL_mainstack = c->mainstack;	318	PL_mainstack = c->mainstack;
297	PL_stack_sp = c->stack_sp;	319	PL_stack_sp = c->stack_sp;
298	PL_op = c->op;	320	PL_op = c->op;
299	PL_curpad = c->curpad;	321	PL_curpad = c->curpad;
		322	PL_comppad = c->comppad;
300	PL_stack_base = c->stack_base;	323	PL_stack_base = c->stack_base;
301	PL_stack_max = c->stack_max;	324	PL_stack_max = c->stack_max;
302	PL_tmps_stack = c->tmps_stack;	325	PL_tmps_stack = c->tmps_stack;
303	PL_tmps_floor = c->tmps_floor;	326	PL_tmps_floor = c->tmps_floor;
304	PL_tmps_ix = c->tmps_ix;	327	PL_tmps_ix = c->tmps_ix;
…		…
314	PL_savestack_max = c->savestack_max;	337	PL_savestack_max = c->savestack_max;
315	PL_retstack = c->retstack;	338	PL_retstack = c->retstack;
316	PL_retstack_ix = c->retstack_ix;	339	PL_retstack_ix = c->retstack_ix;
317	PL_retstack_max = c->retstack_max;	340	PL_retstack_max = c->retstack_max;
318	PL_curcop = c->curcop;	341	PL_curcop = c->curcop;
319	PL_start_env = c->start_env;
320	PL_top_env = c->top_env;	342	PL_top_env = c->top_env;
321		343
322	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
323	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
324	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
364		386
365	PUSHs (Nullsv);	387	PUSHs (Nullsv);
366	/* this loop was inspired by pp_caller */	388	/* this loop was inspired by pp_caller */
367	for (;;)	389	for (;;)
368	{	390	{
369	do	391	while (cxix >= 0)
370	{	392	{
371	PERL_CONTEXT *cx = &ccstk[cxix--];	393	PERL_CONTEXT *cx = &ccstk[cxix--];
372		394
373	if (CxTYPE(cx) == CXt_SUB)	395	if (CxTYPE(cx) == CXt_SUB)
374	{	396	{
…		…
393	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
394		416
395	get_padlist (cv); /* this is a monster */	417	get_padlist (cv); /* this is a monster */
396	}	418	}
397	}	419	}
		420	#ifdef CXt_FORMAT
398	else if (CxTYPE(cx) == CXt_FORMAT)	421	else if (CxTYPE(cx) == CXt_FORMAT)
399	{	422	{
400	/* 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? */
401	/* my bold guess is as a simple, plain sub... */	424	/* my bold guess is as a simple, plain sub... */
402	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");
403	}	426	}
		427	#endif
404	}	428	}
405	while (cxix >= 0);
406		429
407	if (top_si->si_type == PERLSI_MAIN)	430	if (top_si->si_type == PERLSI_MAIN)
408	break;	431	break;
409		432
410	top_si = top_si->si_prev;	433	top_si = top_si->si_prev;
…		…
417		440
418	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;
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
420	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
421		444
422	/* I have not the slightest idea of why av_reify is necessary */
423	/* but if it's missing the defav contents magically get replaced sometimes */
424	if (c->defav)
425	av_reify (c->defav);
426
427	c->dowarn = PL_dowarn;	445	c->dowarn = PL_dowarn;
		446	c->in_eval = PL_in_eval;
428		447
429	c->curstackinfo = PL_curstackinfo;	448	c->curstackinfo = PL_curstackinfo;
430	c->curstack = PL_curstack;	449	c->curstack = PL_curstack;
431	c->mainstack = PL_mainstack;	450	c->mainstack = PL_mainstack;
432	c->stack_sp = PL_stack_sp;	451	c->stack_sp = PL_stack_sp;
433	c->op = PL_op;	452	c->op = PL_op;
434	c->curpad = PL_curpad;	453	c->curpad = PL_curpad;
		454	c->comppad = PL_comppad;
435	c->stack_base = PL_stack_base;	455	c->stack_base = PL_stack_base;
436	c->stack_max = PL_stack_max;	456	c->stack_max = PL_stack_max;
437	c->tmps_stack = PL_tmps_stack;	457	c->tmps_stack = PL_tmps_stack;
438	c->tmps_floor = PL_tmps_floor;	458	c->tmps_floor = PL_tmps_floor;
439	c->tmps_ix = PL_tmps_ix;	459	c->tmps_ix = PL_tmps_ix;
…		…
449	c->savestack_max = PL_savestack_max;	469	c->savestack_max = PL_savestack_max;
450	c->retstack = PL_retstack;	470	c->retstack = PL_retstack;
451	c->retstack_ix = PL_retstack_ix;	471	c->retstack_ix = PL_retstack_ix;
452	c->retstack_max = PL_retstack_max;	472	c->retstack_max = PL_retstack_max;
453	c->curcop = PL_curcop;	473	c->curcop = PL_curcop;
454	c->start_env = PL_start_env;
455	c->top_env = PL_top_env;	474	c->top_env = PL_top_env;
456	}	475	}
457		476
458	/*	477	/*
459	* allocate various perl stacks. This is an exact copy	478	* allocate various perl stacks. This is an exact copy
…		…
480		499
481	New(54,PL_markstack,16,I32);	500	New(54,PL_markstack,16,I32);
482	PL_markstack_ptr = PL_markstack;	501	PL_markstack_ptr = PL_markstack;
483	PL_markstack_max = PL_markstack + 16;	502	PL_markstack_max = PL_markstack + 16;
484		503
		504	#ifdef SET_MARK_OFFSET
485	SET_MARK_OFFSET;	505	SET_MARK_OFFSET;
		506	#endif
486		507
487	New(54,PL_scopestack,16,I32);	508	New(54,PL_scopestack,16,I32);
488	PL_scopestack_ix = 0;	509	PL_scopestack_ix = 0;
489	PL_scopestack_max = 16;	510	PL_scopestack_max = 16;
490		511
…		…
502	* still there is a memleak of 128 bytes...	523	* still there is a memleak of 128 bytes...
503	*/	524	*/
504	STATIC void	525	STATIC void
505	destroy_stacks(pTHX)	526	destroy_stacks(pTHX)
506	{	527	{
		528	if (!IN_DESTRUCT)
		529	{
507	/* is this ugly, I ask? */	530	/* is this ugly, I ask? */
508	while (PL_scopestack_ix)	531	while (PL_scopestack_ix)
509	LEAVE;	532	LEAVE;
510		533
511	/* sure it is, but more important: is it correct?? :/ */	534	/* sure it is, but more important: is it correct?? :/ */
512	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 */
513	FREETMPS;	536	FREETMPS;
		537	}
514		538
515	while (PL_curstackinfo->si_next)	539	while (PL_curstackinfo->si_next)
516	PL_curstackinfo = PL_curstackinfo->si_next;	540	PL_curstackinfo = PL_curstackinfo->si_next;
517		541
518	while (PL_curstackinfo)	542	while (PL_curstackinfo)
…		…
523	dSP;	547	dSP;
524	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
525	PUTBACK; /* possibly superfluous */	549	PUTBACK; /* possibly superfluous */
526	}	550	}
527		551
		552	if (!IN_DESTRUCT)
		553	{
528	dounwind(-1);	554	dounwind(-1);
529
530	SvREFCNT_dec(PL_curstackinfo->si_stack);	555	SvREFCNT_dec(PL_curstackinfo->si_stack);
		556	}
		557
531	Safefree(PL_curstackinfo->si_cxstack);	558	Safefree(PL_curstackinfo->si_cxstack);
532	Safefree(PL_curstackinfo);	559	Safefree(PL_curstackinfo);
533	PL_curstackinfo = p;	560	PL_curstackinfo = p;
534	}	561	}
535		562
…		…
550	stack->refcnt = 1;	577	stack->refcnt = 1;
551	stack->usecnt = 1;	578	stack->usecnt = 1;
552	stack->gencnt = ctx->gencnt = 0;	579	stack->gencnt = ctx->gencnt = 0;
553	if (alloc)	580	if (alloc)
554	{	581	{
555	#ifdef HAVE_MMAP	582	#if HAVE_MMAP
556	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 */
557	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);
558	if (stack->sptr == (void *)-1)	585	if (stack->sptr == (void *)-1)
559	#endif	586	#endif
560	{	587	{
561	/FIXME//D//* reasonable stack size! */	588	/FIXME//D//* reasonable stack size! */
562	stack->ssize = -4096 * sizeof (long);	589	stack->ssize = -4096 * sizeof (long);
…		…
582	{	609	{
583	#ifdef HAVE_MMAP	610	#ifdef HAVE_MMAP
584	if (stack->ssize > 0 && stack->sptr)	611	if (stack->ssize > 0 && stack->sptr)
585	munmap (stack->sptr, stack->ssize);	612	munmap (stack->sptr, stack->ssize);
586	else	613	else
587	#else	614	#endif
588	Safefree (stack->sptr);	615	Safefree (stack->sptr);
589	#endif	616
590	Safefree (stack);	617	Safefree (stack);
591	}	618	}
592	else if (ctx->gencnt == stack->gencnt)	619	else if (ctx->gencnt == stack->gencnt)
593	--stack->usecnt;	620	--stack->usecnt;
594	}	621	}
…		…
603	dSP;	630	dSP;
604	Coro__State ctx = (Coro__State)arg;	631	Coro__State ctx = (Coro__State)arg;
605	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	632	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
606		633
607	coro_init_stacks (aTHX);	634	coro_init_stacks (aTHX);
608	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
609	SPAGAIN;	640	SPAGAIN;
610
611	/PL_curcop = 0;/
612	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args;
614		641
615	if (ctx->stack)	642	if (ctx->stack)
616	{	643	{
617	ctx->cursp = 0;	644	ctx->cursp = 0;
618		645
619	PUSHMARK(SP);	646	PUSHMARK(SP);
620	PUTBACK;	647	PUTBACK;
621	(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
622	croak ("FATAL: CCTXT coroutine returned!");	653	croak ("FATAL: CCTXT coroutine returned!");
623	}	654	}
624	else	655	else
625	{	656	{
626	UNOP myop;	657	UNOP myop;
627		658
…		…
639	* that doesn't matter, though, since it is only	670	* that doesn't matter, though, since it is only
640	* pp_nextstate and we never return...	671	* pp_nextstate and we never return...
641	* ah yes, and I don't care anyways ;)	672	* ah yes, and I don't care anyways ;)
642	*/	673	*/
643	PUTBACK;	674	PUTBACK;
644	PL_op = pp_entersub();	675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
645	SPAGAIN;	676	SPAGAIN;
646		677
647	ENTER; /* necessary e.g. for dounwind */	678	ENTER; /* necessary e.g. for dounwind */
648	}	679	}
649	}	680	}
…		…
653	{	684	{
654	/*	685	/*
655	* this is a _very_ stripped down perl interpreter ;)	686	* this is a _very_ stripped down perl interpreter ;)
656	*/	687	*/
657	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;
658		692
659	ctx->cursp = 0;	693	ctx->cursp = 0;
660	PL_op = PL_op->op_next;	694	PL_op = PL_op->op_next;
661	CALLRUNOPS(aTHX);	695	CALLRUNOPS(aTHX);
662	/NORETURN/	696
663	abort ();	697	abort ();
664	}	698	}
665		699
666	STATIC void	700	STATIC void
667	transfer(pTHX_ struct coro prev, struct coro next, int flags)	701	transfer(pTHX_ struct coro prev, struct coro next, int flags)
668	{	702	{
669	dSP;
670	dSTACKLEVEL;	703	dSTACKLEVEL;
		704	static struct coro *xnext;
671		705
672	if (prev != next)	706	if (prev != next)
673	{	707	{
		708	xnext = next;
		709
674	if (next->mainstack)	710	if (next->mainstack)
675	{	711	{
676	SAVE (prev, flags);	712	SAVE (prev, flags);
677	LOAD (next);	713	LOAD (next);
678		714
…		…
701	continue_coro, (void *)next,	737	continue_coro, (void *)next,
702	next->stack->sptr, labs (next->stack->ssize));	738	next->stack->sptr, labs (next->stack->ssize));
703	}	739	}
704		740
705	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	741	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		742	/* don't add any code here */
706	}	743	}
707		744
708	}	745	}
709	else if (next->tmps_ix == -2)	746	else if (next->tmps_ix == -2)
710	croak ("tried to transfer to running coroutine");	747	croak ("tried to transfer to running coroutine");
…		…
717	if (!prev->stack)	754	if (!prev->stack)
718	allocate_stack (prev, 0);	755	allocate_stack (prev, 0);
719		756
720	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)	757	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
721	{	758	{
		759	PL_top_env = &next->start_env;
		760
722	setup_coro (next);	761	setup_coro (next);
723		762
724	prev->stack->refcnt++;	763	prev->stack->refcnt++;
725	prev->stack->usecnt++;	764	prev->stack->usecnt++;
726	next->stack = prev->stack;	765	next->stack = prev->stack;
727	next->gencnt = prev->gencnt;	766	next->gencnt = prev->gencnt;
728	}	767	}
729	else	768	else
730	{	769	{
		770	assert (!next->stack);
731	allocate_stack (next, 1);	771	allocate_stack (next, 1);
732	coro_create (&(next->stack->cctx),	772	coro_create (&(next->stack->cctx),
733	setup_coro, (void *)next,	773	setup_coro, (void *)next,
734	next->stack->sptr, labs (next->stack->ssize));	774	next->stack->sptr, labs (next->stack->ssize));
735	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	775	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		776	/* don't add any code here */
736	}	777	}
737	}	778	}
738	else	779	else
739	setup_coro (next);	780	setup_coro (next);
740	}	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;
741	}	789	}
742		790
743	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 ();
744	}	922	}
745		923
746	MODULE = Coro::State PACKAGE = Coro::State	924	MODULE = Coro::State PACKAGE = Coro::State
747		925
748	PROTOTYPES: ENABLE	926	PROTOTYPES: ENABLE
…		…
760		938
761	if (!padlist_cache)	939	if (!padlist_cache)
762	padlist_cache = newHV ();	940	padlist_cache = newHV ();
763		941
764	main_mainstack = PL_mainstack;	942	main_mainstack = PL_mainstack;
		943
		944	coroapi.ver = CORO_API_VERSION;
		945	coroapi.transfer = api_transfer;
765	}	946	}
766		947
767	Coro::State	948	Coro::State
768	_newprocess(args)	949	_newprocess(args)
769	SV * args	950	SV * args
…		…
772	Coro__State coro;	953	Coro__State coro;
773		954
774	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	955	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
775	croak ("Coro::State::_newprocess expects an arrayref");	956	croak ("Coro::State::_newprocess expects an arrayref");
776		957
777	New (0, coro, 1, struct coro);	958	Newz (0, coro, 1, struct coro);
778		959
779	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	960	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
780	coro->mainstack = 0; /* actual work is done inside transfer */	961	coro->mainstack = 0; /* actual work is done inside transfer */
781	coro->stack = 0;	962	coro->stack = 0;
782		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
783	RETVAL = coro;	970	RETVAL = coro;
784	OUTPUT:	971	OUTPUT:
785	RETVAL	972	RETVAL
786		973
787	void	974	void
788	transfer(prev, next, flags = TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK)	975	transfer(prev, next, flags)
789	Coro::State_or_hashref prev	976	SV *prev
790	Coro::State_or_hashref next	977	SV *next
791	int flags	978	int flags
792	PROTOTYPE: @	979	PROTOTYPE: @
793	CODE:	980	CODE:
		981	PUTBACK;
		982	SV_CORO (next, "Coro::transfer");
		983	SV_CORO (prev, "Coro::transfer");
794	transfer (aTHX_ prev, next, flags);	984	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		985	SPAGAIN;
795		986
796	void	987	void
797	DESTROY(coro)	988	DESTROY(coro)
798	Coro::State coro	989	Coro::State coro
799	CODE:	990	CODE:
800		991
801	if (coro->mainstack && coro->mainstack != main_mainstack)	992	if (coro->mainstack && coro->mainstack != main_mainstack)
802	{	993	{
803	struct coro temp;	994	struct coro temp;
804		995
		996	PUTBACK;
805	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	997	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
806	LOAD(aTHX_ coro);	998	LOAD(aTHX_ coro);
		999	SPAGAIN;
807		1000
808	destroy_stacks (aTHX);	1001	destroy_stacks (aTHX);
809		1002
810	LOAD((&temp)); /* this will get rid of defsv etc.. */	1003	LOAD((&temp)); /* this will get rid of defsv etc.. */
		1004	SPAGAIN;
811		1005
812	coro->mainstack = 0;	1006	coro->mainstack = 0;
813	}	1007	}
814		1008
815	deallocate_stack (coro);	1009	deallocate_stack (coro);
816		1010	SvREFCNT_dec (coro->args);
817	Safefree (coro);	1011	Safefree (coro);
818		1012
819	void	1013	void
820	flush()	1014	flush()
821	CODE:	1015	CODE:
822	#ifdef MAY_FLUSH	1016	#ifdef MAY_FLUSH
823	flush_padlist_cache ();	1017	flush_padlist_cache ();
824	#endif	1018	#endif
825		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
826	MODULE = Coro::State PACKAGE = Coro::Cont	1033	MODULE = Coro::State PACKAGE = Coro::Cont
827		1034
828	# this is slightly dirty	1035	# this is slightly dirty (should expose a c-level api)
829		1036
830	void	1037	void
831	yield(...)	1038	yield(...)
832	PROTOTYPE: @	1039	PROTOTYPE: @
833	CODE:	1040	CODE:
…		…
835	SV *sv;	1042	SV *sv;
836	AV *defav = GvAV (PL_defgv);	1043	AV *defav = GvAV (PL_defgv);
837	struct coro prev, next;	1044	struct coro prev, next;
838		1045
839	if (!returnstk)	1046	if (!returnstk)
840	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1047	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
841		1048
842	/* set up @_ -- ugly */	1049	/* set up @_ -- ugly */
843	av_clear (defav);	1050	av_clear (defav);
844	av_fill (defav, items - 1);	1051	av_fill (defav, items - 1);
845	while (items--)	1052	while (items--)
…		…
851	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)));
852	SvREFCNT_dec (sv);	1059	SvREFCNT_dec (sv);
853		1060
854	transfer(aTHX_ prev, next, 0);	1061	transfer(aTHX_ prev, next, 0);
855		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 1.18 by root, Thu Jul 26 03:46:15 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 1.18 by root, Thu Jul 26 03:46:15 2001 UTC vs.
Revision 1.47 by pcg, Sat Nov 15 03:53:10 2003 UTC