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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.45 by root, Tue May 27 01:15:31 2003 UTC

…		…
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#include "libcoro/coro.c"	5	#include "libcoro/coro.c"
6		6
		7	#include <signal.h>
		8
7	#ifdef HAVE_MMAP	9	#ifdef HAVE_MMAP
8	# include <unistd.h>	10	# include <unistd.h>
9	# include <sys/mman.h>	11	# include <sys/mman.h>
		12	# ifndef MAP_ANONYMOUS
		13	# ifdef MAP_ANON
		14	# define MAP_ANONYMOUS MAP_ANON
		15	# else
		16	# undef HAVE_MMAP
		17	# endif
		18	# endif
10	#endif	19	#endif
11		20
12	#define MAY_FLUSH /* increases codesize */	21	#define MAY_FLUSH /* increases codesize and is rarely used */
13
14	/* perl-related */
15	#define TRANSFER_SAVE_DEFAV 0x00000001
16	#define TRANSFER_SAVE_DEFSV 0x00000002
17	#define TRANSFER_SAVE_ERRSV 0x00000004
18	/* c-related */
19	#define TRANSFER_SAVE_CCTXT 0x00000008
20	#ifdef CORO_LAZY_STACK
21	# define TRANSFER_LAZY_STACK 0x00000010
22	#else
23	# define TRANSFER_LAZY_STACK 0x00000000
24	#endif
25
26	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV\|TRANSFER_SAVE_DEFSV \
27	\|TRANSFER_SAVE_ERRSV\|TRANSFER_SAVE_CCTXT)
28		22
29	#define SUB_INIT "Coro::State::initialize"	23	#define SUB_INIT "Coro::State::initialize"
30	#define UCORO_STATE "_coro_state"	24	#define UCORO_STATE "_coro_state"
31		25
32	/* The next macro should delcare a variable stacklevel that contains and approximation	26	/* The next macro should declare a variable stacklevel that contains and approximation
33	* to the current C stack pointer. It's property is that it changes with each call	27	* to the current C stack pointer. Its property is that it changes with each call
34	* and should be unique. */	28	* and should be unique. */
35	#define dSTACKLEVEL void *stacklevel = &stacklevel	29	#define dSTACKLEVEL void *stacklevel = &stacklevel
36		30
		31	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		32
37	#define labs(l) ((l) >= 0 ? (l) : -(l))	33	#define labs(l) ((l) >= 0 ? (l) : -(l))
		34
		35	#include "CoroAPI.h"
		36
		37	static struct CoroAPI coroapi;
38		38
39	/* this is actually not only the c stack but also c registers etc... */	39	/* this is actually not only the c stack but also c registers etc... */
40	typedef struct {	40	typedef struct {
41	int refcnt; /* pointer reference counter */	41	int refcnt; /* pointer reference counter */
42	int usecnt; /* shared by how many coroutines */	42	int usecnt; /* shared by how many coroutines */
…		…
46		46
47	void *sptr;	47	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	48	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;	49	} coro_stack;
50		50
51	static coro_stack main_stack = { 1, 0, 0 };
52
53	struct coro {	51	struct coro {
		52	/* the top-level JMPENV for each coroutine, needed to catch dies. */
		53	JMPENV start_env;
		54
54	/* the optional C context */	55	/* the optional C context */
55	coro_stack *stack;	56	coro_stack *stack;
56	void *cursp;	57	void *cursp;
57	int gencnt;	58	int gencnt;
58		59
…		…
61	SV *defsv;	62	SV *defsv;
62	SV *errsv;	63	SV *errsv;
63		64
64	/* saved global state not related to stacks */	65	/* saved global state not related to stacks */
65	U8 dowarn;	66	U8 dowarn;
		67	I32 in_eval;
66		68
67	/* the stacks and related info (callchain etc..) */	69	/* the stacks and related info (callchain etc..) */
68	PERL_SI *curstackinfo;	70	PERL_SI *curstackinfo;
69	AV *curstack;	71	AV *curstack;
70	AV *mainstack;	72	AV *mainstack;
71	SV **stack_sp;	73	SV **stack_sp;
72	OP *op;	74	OP *op;
73	SV **curpad;	75	SV **curpad;
		76	AV *comppad;
74	SV **stack_base;	77	SV **stack_base;
75	SV **stack_max;	78	SV **stack_max;
76	SV **tmps_stack;	79	SV **tmps_stack;
77	I32 tmps_floor;	80	I32 tmps_floor;
78	I32 tmps_ix;	81	I32 tmps_ix;
…		…
88	I32 savestack_max;	91	I32 savestack_max;
89	OP **retstack;	92	OP **retstack;
90	I32 retstack_ix;	93	I32 retstack_ix;
91	I32 retstack_max;	94	I32 retstack_max;
92	COP *curcop;	95	COP *curcop;
93	JMPENV start_env;
94	JMPENV *top_env;	96	JMPENV *top_env;
95		97
96	/* data associated with this coroutine (initial args) */	98	/* data associated with this coroutine (initial args) */
97	AV *args;	99	AV *args;
98	};	100	};
…		…
103	static AV main_mainstack; / used to differentiate between $main and others */	105	static AV main_mainstack; / used to differentiate between $main and others */
104	static HV *coro_state_stash;	106	static HV *coro_state_stash;
105	static SV *ucoro_state_sv;	107	static SV *ucoro_state_sv;
106	static U32 ucoro_state_hash;	108	static U32 ucoro_state_hash;
107	static HV *padlist_cache;	109	static HV *padlist_cache;
		110	static SV coro_mortal; / will be freed after next transfer */
108		111
109	/* mostly copied from op.c:cv_clone2 */	112	/* mostly copied from op.c:cv_clone2 */
110	STATIC AV *	113	STATIC AV *
111	clone_padlist (AV *protopadlist)	114	clone_padlist (AV *protopadlist)
112	{	115	{
…		…
199		202
200	return newpadlist;	203	return newpadlist;
201	}	204	}
202		205
203	#ifdef MAY_FLUSH	206	#ifdef MAY_FLUSH
204	STATIC AV *	207	STATIC void
205	free_padlist (AV *padlist)	208	free_padlist (AV *padlist)
206	{	209	{
207	/* may be during global destruction */	210	/* may be during global destruction */
208	if (SvREFCNT(padlist))	211	if (SvREFCNT(padlist))
209	{	212	{
…		…
274	#endif	277	#endif
275		278
276	#define SB do {	279	#define SB do {
277	#define SE } while (0)	280	#define SE } while (0)
278		281
279	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	282	#define LOAD(state) load_state(aTHX_ (state));
280	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	283	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281		284
282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283		286
284	static void	287	static void
285	load_state(pTHX_ Coro__State c)	288	load_state(pTHX_ Coro__State c)
286	{	289	{
287	PL_dowarn = c->dowarn;	290	PL_dowarn = c->dowarn;
		291	PL_in_eval = c->in_eval;
288		292
289	PL_curstackinfo = c->curstackinfo;	293	PL_curstackinfo = c->curstackinfo;
290	PL_curstack = c->curstack;	294	PL_curstack = c->curstack;
291	PL_mainstack = c->mainstack;	295	PL_mainstack = c->mainstack;
292	PL_stack_sp = c->stack_sp;	296	PL_stack_sp = c->stack_sp;
293	PL_op = c->op;	297	PL_op = c->op;
294	PL_curpad = c->curpad;	298	PL_curpad = c->curpad;
		299	PL_comppad = c->comppad;
295	PL_stack_base = c->stack_base;	300	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;	301	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;	302	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;	303	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;	304	PL_tmps_ix = c->tmps_ix;
…		…
309	PL_savestack_max = c->savestack_max;	314	PL_savestack_max = c->savestack_max;
310	PL_retstack = c->retstack;	315	PL_retstack = c->retstack;
311	PL_retstack_ix = c->retstack_ix;	316	PL_retstack_ix = c->retstack_ix;
312	PL_retstack_max = c->retstack_max;	317	PL_retstack_max = c->retstack_max;
313	PL_curcop = c->curcop;	318	PL_curcop = c->curcop;
314	PL_start_env = c->start_env;
315	PL_top_env = c->top_env;	319	PL_top_env = c->top_env;
316		320
317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	321	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	322	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	323	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
359		363
360	PUSHs (Nullsv);	364	PUSHs (Nullsv);
361	/* this loop was inspired by pp_caller */	365	/* this loop was inspired by pp_caller */
362	for (;;)	366	for (;;)
363	{	367	{
364	do	368	while (cxix >= 0)
365	{	369	{
366	PERL_CONTEXT *cx = &ccstk[cxix--];	370	PERL_CONTEXT *cx = &ccstk[cxix--];
367		371
368	if (CxTYPE(cx) == CXt_SUB)	372	if (CxTYPE(cx) == CXt_SUB)
369	{	373	{
…		…
395	/* I never used formats, so how should I know how these are implemented? */	399	/* I never used formats, so how should I know how these are implemented? */
396	/* my bold guess is as a simple, plain sub... */	400	/* my bold guess is as a simple, plain sub... */
397	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	401	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398	}	402	}
399	}	403	}
400	while (cxix >= 0);
401		404
402	if (top_si->si_type == PERLSI_MAIN)	405	if (top_si->si_type == PERLSI_MAIN)
403	break;	406	break;
404		407
405	top_si = top_si->si_prev;	408	top_si = top_si->si_prev;
…		…
412		415
413	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	416	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
414	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	417	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
415	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	418	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
416		419
417	/* I have not the slightest idea of why av_reify is necessary */
418	/* but if it's missing the defav contents magically get replaced sometimes */
419	if (c->defav)
420	av_reify (c->defav);
421
422	c->dowarn = PL_dowarn;	420	c->dowarn = PL_dowarn;
		421	c->in_eval = PL_in_eval;
423		422
424	c->curstackinfo = PL_curstackinfo;	423	c->curstackinfo = PL_curstackinfo;
425	c->curstack = PL_curstack;	424	c->curstack = PL_curstack;
426	c->mainstack = PL_mainstack;	425	c->mainstack = PL_mainstack;
427	c->stack_sp = PL_stack_sp;	426	c->stack_sp = PL_stack_sp;
428	c->op = PL_op;	427	c->op = PL_op;
429	c->curpad = PL_curpad;	428	c->curpad = PL_curpad;
		429	c->comppad = PL_comppad;
430	c->stack_base = PL_stack_base;	430	c->stack_base = PL_stack_base;
431	c->stack_max = PL_stack_max;	431	c->stack_max = PL_stack_max;
432	c->tmps_stack = PL_tmps_stack;	432	c->tmps_stack = PL_tmps_stack;
433	c->tmps_floor = PL_tmps_floor;	433	c->tmps_floor = PL_tmps_floor;
434	c->tmps_ix = PL_tmps_ix;	434	c->tmps_ix = PL_tmps_ix;
…		…
444	c->savestack_max = PL_savestack_max;	444	c->savestack_max = PL_savestack_max;
445	c->retstack = PL_retstack;	445	c->retstack = PL_retstack;
446	c->retstack_ix = PL_retstack_ix;	446	c->retstack_ix = PL_retstack_ix;
447	c->retstack_max = PL_retstack_max;	447	c->retstack_max = PL_retstack_max;
448	c->curcop = PL_curcop;	448	c->curcop = PL_curcop;
449	c->start_env = PL_start_env;
450	c->top_env = PL_top_env;	449	c->top_env = PL_top_env;
451	}	450	}
452		451
453	/*	452	/*
454	* allocate various perl stacks. This is an exact copy	453	* allocate various perl stacks. This is an exact copy
…		…
497	* still there is a memleak of 128 bytes...	496	* still there is a memleak of 128 bytes...
498	*/	497	*/
499	STATIC void	498	STATIC void
500	destroy_stacks(pTHX)	499	destroy_stacks(pTHX)
501	{	500	{
		501	if (!IN_DESTRUCT)
		502	{
502	/* is this ugly, I ask? */	503	/* is this ugly, I ask? */
503	while (PL_scopestack_ix)	504	while (PL_scopestack_ix)
504	LEAVE;	505	LEAVE;
505		506
506	/* sure it is, but more important: is it correct?? :/ */	507	/* sure it is, but more important: is it correct?? :/ */
507	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	508	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
508	FREETMPS;	509	FREETMPS;
		510	}
509		511
510	while (PL_curstackinfo->si_next)	512	while (PL_curstackinfo->si_next)
511	PL_curstackinfo = PL_curstackinfo->si_next;	513	PL_curstackinfo = PL_curstackinfo->si_next;
512		514
513	while (PL_curstackinfo)	515	while (PL_curstackinfo)
…		…
518	dSP;	520	dSP;
519	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	521	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
520	PUTBACK; /* possibly superfluous */	522	PUTBACK; /* possibly superfluous */
521	}	523	}
522		524
		525	if (!IN_DESTRUCT)
		526	{
523	dounwind(-1);	527	dounwind(-1);
524
525	SvREFCNT_dec(PL_curstackinfo->si_stack);	528	SvREFCNT_dec(PL_curstackinfo->si_stack);
		529	}
		530
526	Safefree(PL_curstackinfo->si_cxstack);	531	Safefree(PL_curstackinfo->si_cxstack);
527	Safefree(PL_curstackinfo);	532	Safefree(PL_curstackinfo);
528	PL_curstackinfo = p;	533	PL_curstackinfo = p;
529	}	534	}
530		535
…		…
545	stack->refcnt = 1;	550	stack->refcnt = 1;
546	stack->usecnt = 1;	551	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;	552	stack->gencnt = ctx->gencnt = 0;
548	if (alloc)	553	if (alloc)
549	{	554	{
550	#ifdef HAVE_MMAP	555	#if HAVE_MMAP
551	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */	556	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);	557	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
553	if (stack->sptr == (void *)-1)	558	if (stack->sptr == (void *)-1)
554	#endif	559	#endif
555	{	560	{
556	/FIXME//D//* reasonable stack size! */	561	/FIXME//D//* reasonable stack size! */
557	stack->ssize = -4096 * sizeof (long);	562	stack->ssize = -4096 * sizeof (long);
…		…
598	dSP;	603	dSP;
599	Coro__State ctx = (Coro__State)arg;	604	Coro__State ctx = (Coro__State)arg;
600	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	605	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
601		606
602	coro_init_stacks (aTHX);	607	coro_init_stacks (aTHX);
603	JMPENV_BOOTSTRAP;
604	SPAGAIN;
605
606	/PL_curcop = 0;/	608	/PL_curcop = 0;/
		609	/PL_in_eval = PL_in_eval;/ /* inherit */
607	SvREFCNT_dec (GvAV (PL_defgv));	610	SvREFCNT_dec (GvAV (PL_defgv));
608	GvAV (PL_defgv) = ctx->args;	611	GvAV (PL_defgv) = ctx->args;
609		612
		613	SPAGAIN;
		614
610	if (ctx->stack)	615	if (ctx->stack)
611	{	616	{
612	ctx->cursp = 0;	617	ctx->cursp = 0;
613		618
614	PUSHMARK(SP);	619	PUSHMARK(SP);
615	PUTBACK;	620	PUTBACK;
616	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	621	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		622
		623	if (SvTRUE (ERRSV))
		624	croak (NULL);
		625	else
617	croak ("FATAL: CCTXT coroutine returned!");	626	croak ("FATAL: CCTXT coroutine returned!");
618	}	627	}
619	else	628	else
620	{	629	{
621	UNOP myop;	630	UNOP myop;
622		631
…		…
634	* that doesn't matter, though, since it is only	643	* that doesn't matter, though, since it is only
635	* pp_nextstate and we never return...	644	* pp_nextstate and we never return...
636	* ah yes, and I don't care anyways ;)	645	* ah yes, and I don't care anyways ;)
637	*/	646	*/
638	PUTBACK;	647	PUTBACK;
639	PL_op = pp_entersub();	648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640	SPAGAIN;	649	SPAGAIN;
641		650
642	ENTER; /* necessary e.g. for dounwind */	651	ENTER; /* necessary e.g. for dounwind */
643	}	652	}
644	}	653	}
…		…
648	{	657	{
649	/*	658	/*
650	* this is a _very_ stripped down perl interpreter ;)	659	* this is a _very_ stripped down perl interpreter ;)
651	*/	660	*/
652	Coro__State ctx = (Coro__State)arg;	661	Coro__State ctx = (Coro__State)arg;
		662	JMPENV coro_start_env;
		663
		664	PL_top_env = &ctx->start_env;
653		665
654	ctx->cursp = 0;	666	ctx->cursp = 0;
655	PL_op = PL_op->op_next;	667	PL_op = PL_op->op_next;
656	CALLRUNOPS(aTHX);	668	CALLRUNOPS(aTHX);
657	/NORETURN/	669
658	abort ();	670	abort ();
659	}	671	}
660		672
661	STATIC void	673	STATIC void
662	transfer(pTHX_ struct coro prev, struct coro next, int flags)	674	transfer(pTHX_ struct coro prev, struct coro next, int flags)
663	{	675	{
664	dSP;
665	dSTACKLEVEL;	676	dSTACKLEVEL;
		677	static struct coro *xnext;
666		678
667	if (prev != next)	679	if (prev != next)
668	{	680	{
		681	xnext = next;
		682
669	if (next->mainstack)	683	if (next->mainstack)
670	{	684	{
671	SAVE (prev, flags);	685	SAVE (prev, flags);
672	LOAD (next);	686	LOAD (next);
673		687
…		…
696	continue_coro, (void *)next,	710	continue_coro, (void *)next,
697	next->stack->sptr, labs (next->stack->ssize));	711	next->stack->sptr, labs (next->stack->ssize));
698	}	712	}
699		713
700	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		715	/* don't add any code here */
701	}	716	}
702		717
703	}	718	}
704	else if (next->tmps_ix == -2)	719	else if (next->tmps_ix == -2)
705	croak ("tried to transfer to running coroutine");	720	croak ("tried to transfer to running coroutine");
…		…
712	if (!prev->stack)	727	if (!prev->stack)
713	allocate_stack (prev, 0);	728	allocate_stack (prev, 0);
714		729
715	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)	730	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716	{	731	{
		732	PL_top_env = &next->start_env;
		733
717	setup_coro (next);	734	setup_coro (next);
718		735
719	prev->stack->refcnt++;	736	prev->stack->refcnt++;
720	prev->stack->usecnt++;	737	prev->stack->usecnt++;
721	next->stack = prev->stack;	738	next->stack = prev->stack;
…		…
726	allocate_stack (next, 1);	743	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),	744	coro_create (&(next->stack->cctx),
728	setup_coro, (void *)next,	745	setup_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));	746	next->stack->sptr, labs (next->stack->ssize));
730	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		748	/* don't add any code here */
731	}	749	}
732	}	750	}
733	else	751	else
734	setup_coro (next);	752	setup_coro (next);
735	}	753	}
736	}
737		754
		755	/*
		756	* xnext is now either prev or next, depending on wether
		757	* we switched the c stack or not. that's why I use a global
		758	* variable, that should become thread-specific at one point.
		759	*/
738	next->cursp = stacklevel;	760	xnext->cursp = stacklevel;
		761	}
		762
		763	if (coro_mortal)
		764	{
		765	SvREFCNT_dec (coro_mortal);
		766	coro_mortal = 0;
		767	}
		768	}
		769
		770	#define SV_CORO(sv,func) \
		771	do { \
		772	if (SvROK (sv)) \
		773	sv = SvRV (sv); \
		774	\
		775	if (SvTYPE(sv) == SVt_PVHV) \
		776	{ \
		777	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		778	\
		779	if (!he) \
		780	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		781	\
		782	(sv) = SvRV (HeVAL(he)); \
		783	} \
		784	\
		785	/* must also be changed inside Coro::Cont::yield */ \
		786	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		787	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		788	\
		789	} while(0)
		790
		791	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		792
		793	static void
		794	api_transfer(pTHX_ SV prev, SV next, int flags)
		795	{
		796	SV_CORO (prev, "Coro::transfer");
		797	SV_CORO (next, "Coro::transfer");
		798
		799	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		800	}
		801
		802	/ Coro ******************************************************************/
		803
		804	#define PRIO_MAX 3
		805	#define PRIO_HIGH 1
		806	#define PRIO_NORMAL 0
		807	#define PRIO_LOW -1
		808	#define PRIO_IDLE -3
		809	#define PRIO_MIN -4
		810
		811	/* for Coro.pm */
		812	static GV coro_current, coro_idle;
		813	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		814	static int coro_nready;
		815
		816	static void
		817	coro_enq (SV *sv)
		818	{
		819	if (SvTYPE (sv) == SVt_PVHV)
		820	{
		821	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		822	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		823
		824	prio = prio > PRIO_MAX ? PRIO_MAX
		825	: prio < PRIO_MIN ? PRIO_MIN
		826	: prio;
		827
		828	av_push (coro_ready [prio - PRIO_MIN], sv);
		829	coro_nready++;
		830
		831	return;
		832	}
		833
		834	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		835	}
		836
		837	static SV *
		838	coro_deq (int min_prio)
		839	{
		840	int prio = PRIO_MAX - PRIO_MIN;
		841
		842	min_prio -= PRIO_MIN;
		843	if (min_prio < 0)
		844	min_prio = 0;
		845
		846	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		847	if (av_len (coro_ready[prio]) >= 0)
		848	{
		849	coro_nready--;
		850	return av_shift (coro_ready[prio]);
		851	}
		852
		853	return 0;
		854	}
		855
		856	static void
		857	api_ready (SV *coro)
		858	{
		859	if (SvROK (coro))
		860	coro = SvRV (coro);
		861
		862	coro_enq (SvREFCNT_inc (coro));
		863	}
		864
		865	static void
		866	api_schedule (void)
		867	{
		868	SV prev, next;
		869
		870	prev = SvRV (GvSV (coro_current));
		871	next = coro_deq (PRIO_MIN);
		872
		873	if (!next)
		874	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		875
		876	/* free this only after the transfer */
		877	coro_mortal = prev;
		878	SV_CORO (prev, "Coro::schedule");
		879
		880	SvRV (GvSV (coro_current)) = next;
		881
		882	SV_CORO (next, "Coro::schedule");
		883
		884	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		885	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		886	}
		887
		888	static void
		889	api_cede (void)
		890	{
		891	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		892
		893	api_schedule ();
739	}	894	}
740		895
741	MODULE = Coro::State PACKAGE = Coro::State	896	MODULE = Coro::State PACKAGE = Coro::State
742		897
743	PROTOTYPES: ENABLE	898	PROTOTYPES: ENABLE
…		…
755		910
756	if (!padlist_cache)	911	if (!padlist_cache)
757	padlist_cache = newHV ();	912	padlist_cache = newHV ();
758		913
759	main_mainstack = PL_mainstack;	914	main_mainstack = PL_mainstack;
		915
		916	coroapi.ver = CORO_API_VERSION;
		917	coroapi.transfer = api_transfer;
760	}	918	}
761		919
762	Coro::State	920	Coro::State
763	_newprocess(args)	921	_newprocess(args)
764	SV * args	922	SV * args
…		…
773		931
774	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	932	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
775	coro->mainstack = 0; /* actual work is done inside transfer */	933	coro->mainstack = 0; /* actual work is done inside transfer */
776	coro->stack = 0;	934	coro->stack = 0;
777		935
		936	/* same as JMPENV_BOOTSTRAP */
		937	/* we might be able to recycle start_env, but safe is safe */
		938	Zero(&coro->start_env, 1, JMPENV);
		939	coro->start_env.je_ret = -1;
		940	coro->start_env.je_mustcatch = TRUE;
		941
778	RETVAL = coro;	942	RETVAL = coro;
779	OUTPUT:	943	OUTPUT:
780	RETVAL	944	RETVAL
781		945
782	void	946	void
783	transfer(prev, next, flags = TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK)	947	transfer(prev, next, flags)
784	Coro::State_or_hashref prev	948	SV *prev
785	Coro::State_or_hashref next	949	SV *next
786	int flags	950	int flags
787	PROTOTYPE: @	951	PROTOTYPE: @
788	CODE:	952	CODE:
		953	PUTBACK;
		954	SV_CORO (next, "Coro::transfer");
		955	SV_CORO (prev, "Coro::transfer");
789	transfer (aTHX_ prev, next, flags);	956	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		957	SPAGAIN;
790		958
791	void	959	void
792	DESTROY(coro)	960	DESTROY(coro)
793	Coro::State coro	961	Coro::State coro
794	CODE:	962	CODE:
795		963
796	if (coro->mainstack && coro->mainstack != main_mainstack)	964	if (coro->mainstack && coro->mainstack != main_mainstack)
797	{	965	{
798	struct coro temp;	966	struct coro temp;
799		967
		968	PUTBACK;
800	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	969	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
801	LOAD(aTHX_ coro);	970	LOAD(aTHX_ coro);
		971	SPAGAIN;
802		972
803	destroy_stacks (aTHX);	973	destroy_stacks (aTHX);
804		974
805	LOAD((&temp)); /* this will get rid of defsv etc.. */	975	LOAD((&temp)); /* this will get rid of defsv etc.. */
		976	SPAGAIN;
806		977
807	coro->mainstack = 0;	978	coro->mainstack = 0;
808	}	979	}
809		980
810	deallocate_stack (coro);	981	deallocate_stack (coro);
…		…
816	CODE:	987	CODE:
817	#ifdef MAY_FLUSH	988	#ifdef MAY_FLUSH
818	flush_padlist_cache ();	989	flush_padlist_cache ();
819	#endif	990	#endif
820		991
		992	void
		993	_exit(code)
		994	int code
		995	PROTOTYPE: $
		996	CODE:
		997	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		998	_exit (code);
		999	#else
		1000	signal (SIGTERM, SIG_DFL);
		1001	raise (SIGTERM);
		1002	exit (code);
		1003	#endif
		1004
821	MODULE = Coro::State PACKAGE = Coro::Cont	1005	MODULE = Coro::State PACKAGE = Coro::Cont
822		1006
823	# this is slightly dirty	1007	# this is slightly dirty (should expose a c-level api)
824		1008
825	void	1009	void
826	yield(...)	1010	yield(...)
827	PROTOTYPE: @	1011	PROTOTYPE: @
828	CODE:	1012	CODE:
…		…
846	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1030	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
847	SvREFCNT_dec (sv);	1031	SvREFCNT_dec (sv);
848		1032
849	transfer(aTHX_ prev, next, 0);	1033	transfer(aTHX_ prev, next, 0);
850		1034
		1035	MODULE = Coro::State PACKAGE = Coro
		1036
		1037	# this is slightly dirty (should expose a c-level api)
		1038
		1039	BOOT:
		1040	{
		1041	int i;
		1042	HV *stash = gv_stashpv ("Coro", TRUE);
		1043
		1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1050
		1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1053
		1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1055	coro_ready[i] = newAV ();
		1056
		1057	{
		1058	SV *sv = perl_get_sv("Coro::API", 1);
		1059
		1060	coroapi.schedule = api_schedule;
		1061	coroapi.cede = api_cede;
		1062	coroapi.ready = api_ready;
		1063	coroapi.nready = &coro_nready;
		1064	coroapi.current = coro_current;
		1065
		1066	GCoroAPI = &coroapi;
		1067	sv_setiv(sv, (IV)&coroapi);
		1068	SvREADONLY_on(sv);
		1069	}
		1070	}
		1071
		1072	void
		1073	ready(self)
		1074	SV * self
		1075	PROTOTYPE: $
		1076	CODE:
		1077	api_ready (self);
		1078
		1079	int
		1080	nready(...)
		1081	PROTOTYPE:
		1082	CODE:
		1083	RETVAL = coro_nready;
		1084	OUTPUT:
		1085	RETVAL
		1086
		1087	void
		1088	schedule(...)
		1089	PROTOTYPE:
		1090	CODE:
		1091	api_schedule ();
		1092
		1093	void
		1094	cede(...)
		1095	PROTOTYPE:
		1096	CODE:
		1097	api_cede ();
		1098

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Comparing Coro/Coro/State.xs (file contents): Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs. Revision 1.45 by root, Tue May 27 01:15:31 2003 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.15 by root, Wed Jul 25 04:14:38 2001 UTC vs.
Revision 1.45 by root, Tue May 27 01:15:31 2003 UTC