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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.9 by root, Sat Jul 21 02:49:09 2001 UTC vs.
Revision 1.29 by root, Sat Aug 25 21:40:34 2001 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	#if 1	5	#include "libcoro/coro.c"
6	# define CHK(x) (void *)0	6
		7	#include <signal.h>
		8
		9	#ifdef HAVE_MMAP
		10	# include <unistd.h>
		11	# include <sys/mman.h>
		12	# ifndef MAP_ANON
		13	# ifdef MAP_ANONYMOUS
		14	# define MAP_ANON MAP_ANONYMOUS
7	#else	15	# else
8	# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x)	16	# undef HAVE_MMAP
		17	# endif
		18	# endif
9	#endif	19	#endif
10		20
11	#define MAY_FLUSH /* increases codesize */	21	#define MAY_FLUSH /* increases codesize and is rarely used */
12		22
13	#define SUB_INIT "Coro::State::_newcoro"	23	#define SUB_INIT "Coro::State::initialize"
		24	#define UCORO_STATE "_coro_state"
14		25
15	#define SAVE_DEFAV 0x00000001	26	/* The next macro should declare a variable stacklevel that contains and approximation
16	#define SAVE_DEFSV 0x00000002	27	* to the current C stack pointer. Its property is that it changes with each call
17	#define SAVE_ERRSV 0x00000004	28	* and should be unique. */
		29	#define dSTACKLEVEL void *stacklevel = &stacklevel
18		30
19	#define SAVE_ALL -1	31	#define labs(l) ((l) >= 0 ? (l) : -(l))
		32
		33	#include "CoroAPI.h"
		34
		35	static struct CoroAPI coroapi;
		36
		37	/* this is actually not only the c stack but also c registers etc... */
		38	typedef struct {
		39	int refcnt; /* pointer reference counter */
		40	int usecnt; /* shared by how many coroutines */
		41	int gencnt; /* generation counter */
		42
		43	coro_context cctx;
		44
		45	void *sptr;
		46	long ssize; /* positive == mmap, otherwise malloc */
		47	} coro_stack;
20		48
21	struct coro {	49	struct coro {
		50	/* the optional C context */
		51	coro_stack *stack;
		52	void *cursp;
		53	int gencnt;
		54
22	/* optionally saved, might be zero */	55	/* optionally saved, might be zero */
23	AV *defav;	56	AV *defav;
24	SV *defsv;	57	SV *defsv;
25	SV *errsv;	58	SV *errsv;
26		59
27	/* saved global state not related to stacks */	60	/* saved global state not related to stacks */
28	U8 dowarn;	61	U8 dowarn;
		62	I32 in_eval;
29		63
30	/* the stacks and related info (callchain etc..) */	64	/* the stacks and related info (callchain etc..) */
31	PERL_SI *curstackinfo;	65	PERL_SI *curstackinfo;
32	AV *curstack;	66	AV *curstack;
33	AV *mainstack;	67	AV *mainstack;
51	I32 savestack_max;	85	I32 savestack_max;
52	OP **retstack;	86	OP **retstack;
53	I32 retstack_ix;	87	I32 retstack_ix;
54	I32 retstack_max;	88	I32 retstack_max;
55	COP *curcop;	89	COP *curcop;
		90	JMPENV *top_env;
56		91
57	/* data associated with this coroutine (initial args) */	92	/* data associated with this coroutine (initial args) */
58	AV *args;	93	AV *args;
59	};	94	};
60		95
61	typedef struct coro *Coro__State;	96	typedef struct coro *Coro__State;
62	typedef struct coro *Coro__State_or_hashref;	97	typedef struct coro *Coro__State_or_hashref;
63		98
		99	static AV main_mainstack; / used to differentiate between $main and others */
		100	static HV *coro_state_stash;
		101	static SV *ucoro_state_sv;
		102	static U32 ucoro_state_hash;
64	static HV *padlist_cache;	103	static HV *padlist_cache;
65		104
66	/* mostly copied from op.c:cv_clone2 */	105	/* mostly copied from op.c:cv_clone2 */
67	STATIC AV *	106	STATIC AV *
68	clone_padlist (AV *protopadlist)	107	clone_padlist (AV *protopadlist)
…		…
156		195
157	return newpadlist;	196	return newpadlist;
158	}	197	}
159		198
160	#ifdef MAY_FLUSH	199	#ifdef MAY_FLUSH
161	STATIC AV *	200	STATIC void
162	free_padlist (AV *padlist)	201	free_padlist (AV *padlist)
163	{	202	{
164	/* may be during global destruction */	203	/* may be during global destruction */
165	if (SvREFCNT(padlist))	204	if (SvREFCNT(padlist))
166	{	205	{
…		…
231	#endif	270	#endif
232		271
233	#define SB do {	272	#define SB do {
234	#define SE } while (0)	273	#define SE } while (0)
235		274
236	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	275	#define LOAD(state) load_state(aTHX_ (state));
237	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	276	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
238		277
239	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
240		279
241	static void	280	static void
242	load_state(pTHX_ Coro__State c)	281	load_state(pTHX_ Coro__State c)
243	{	282	{
244	PL_dowarn = c->dowarn;	283	PL_dowarn = c->dowarn;
		284	PL_in_eval = c->in_eval;
245		285
246	PL_curstackinfo = c->curstackinfo;	286	PL_curstackinfo = c->curstackinfo;
247	PL_curstack = c->curstack;	287	PL_curstack = c->curstack;
248	PL_mainstack = c->mainstack;	288	PL_mainstack = c->mainstack;
249	PL_stack_sp = c->stack_sp;	289	PL_stack_sp = c->stack_sp;
…		…
266	PL_savestack_max = c->savestack_max;	306	PL_savestack_max = c->savestack_max;
267	PL_retstack = c->retstack;	307	PL_retstack = c->retstack;
268	PL_retstack_ix = c->retstack_ix;	308	PL_retstack_ix = c->retstack_ix;
269	PL_retstack_max = c->retstack_max;	309	PL_retstack_max = c->retstack_max;
270	PL_curcop = c->curcop;	310	PL_curcop = c->curcop;
		311	PL_top_env = c->top_env;
271		312
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275		316
…		…
302	save_state(pTHX_ Coro__State c, int flags)	343	save_state(pTHX_ Coro__State c, int flags)
303	{	344	{
304	{	345	{
305	dSP;	346	dSP;
306	I32 cxix = cxstack_ix;	347	I32 cxix = cxstack_ix;
		348	PERL_CONTEXT *ccstk = cxstack;
307	PERL_SI *top_si = PL_curstackinfo;	349	PERL_SI *top_si = PL_curstackinfo;
308	PERL_CONTEXT *ccstk = cxstack;
309		350
310	/*	351	/*
311	* the worst thing you can imagine happens first - we have to save	352	* the worst thing you can imagine happens first - we have to save
312	* (and reinitialize) all cv's in the whole callchain :(	353	* (and reinitialize) all cv's in the whole callchain :(
313	*/	354	*/
314		355
315	PUSHs (Nullsv);	356	PUSHs (Nullsv);
316	/* this loop was inspired by pp_caller */	357	/* this loop was inspired by pp_caller */
317	for (;;)	358	for (;;)
318	{	359	{
319	do	360	do
320	{	361	{
321	PERL_CONTEXT *cx = &ccstk[cxix--];	362	PERL_CONTEXT *cx = &ccstk[cxix--];
322		363
323	if (CxTYPE(cx) == CXt_SUB)	364	if (CxTYPE(cx) == CXt_SUB)
324	{	365	{
…		…
363	}	404	}
364		405
365	PUTBACK;	406	PUTBACK;
366	}	407	}
367		408
368	c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	409	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
369	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
370	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
371		412
372	c->dowarn = PL_dowarn;	413	c->dowarn = PL_dowarn;
		414	c->in_eval = PL_in_eval;
373		415
374	c->curstackinfo = PL_curstackinfo;	416	c->curstackinfo = PL_curstackinfo;
375	c->curstack = PL_curstack;	417	c->curstack = PL_curstack;
376	c->mainstack = PL_mainstack;	418	c->mainstack = PL_mainstack;
377	c->stack_sp = PL_stack_sp;	419	c->stack_sp = PL_stack_sp;
…		…
394	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
395	c->retstack = PL_retstack;	437	c->retstack = PL_retstack;
396	c->retstack_ix = PL_retstack_ix;	438	c->retstack_ix = PL_retstack_ix;
397	c->retstack_max = PL_retstack_max;	439	c->retstack_max = PL_retstack_max;
398	c->curcop = PL_curcop;	440	c->curcop = PL_curcop;
		441	c->top_env = PL_top_env;
		442	}
		443
		444	/*
		445	* allocate various perl stacks. This is an exact copy
		446	* of perl.c:init_stacks, except that it uses less memory
		447	* on the assumption that coroutines do not usually need
		448	* a lot of stackspace.
		449	*/
		450	STATIC void
		451	coro_init_stacks (pTHX)
		452	{
		453	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		454	PL_curstackinfo->si_type = PERLSI_MAIN;
		455	PL_curstack = PL_curstackinfo->si_stack;
		456	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		457
		458	PL_stack_base = AvARRAY(PL_curstack);
		459	PL_stack_sp = PL_stack_base;
		460	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		461
		462	New(50,PL_tmps_stack,96,SV*);
		463	PL_tmps_floor = -1;
		464	PL_tmps_ix = -1;
		465	PL_tmps_max = 96;
		466
		467	New(54,PL_markstack,16,I32);
		468	PL_markstack_ptr = PL_markstack;
		469	PL_markstack_max = PL_markstack + 16;
		470
		471	SET_MARK_OFFSET;
		472
		473	New(54,PL_scopestack,16,I32);
		474	PL_scopestack_ix = 0;
		475	PL_scopestack_max = 16;
		476
		477	New(54,PL_savestack,96,ANY);
		478	PL_savestack_ix = 0;
		479	PL_savestack_max = 96;
		480
		481	New(54,PL_retstack,8,OP*);
		482	PL_retstack_ix = 0;
		483	PL_retstack_max = 8;
399	}	484	}
400		485
401	/*	486	/*
402	* destroy the stacks, the callchain etc...	487	* destroy the stacks, the callchain etc...
403	* still there is a memleak of 128 bytes...	488	* still there is a memleak of 128 bytes...
…		…
424	dSP;	509	dSP;
425	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
426	PUTBACK; /* possibly superfluous */	511	PUTBACK; /* possibly superfluous */
427	}	512	}
428		513
		514	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
429	dounwind(-1);	515	dounwind(-1);
430		516
431	SvREFCNT_dec(PL_curstackinfo->si_stack);	517	SvREFCNT_dec(PL_curstackinfo->si_stack);
432	Safefree(PL_curstackinfo->si_cxstack);	518	Safefree(PL_curstackinfo->si_cxstack);
433	Safefree(PL_curstackinfo);	519	Safefree(PL_curstackinfo);
434	PL_curstackinfo = p;	520	PL_curstackinfo = p;
…		…
439	Safefree(PL_scopestack);	525	Safefree(PL_scopestack);
440	Safefree(PL_savestack);	526	Safefree(PL_savestack);
441	Safefree(PL_retstack);	527	Safefree(PL_retstack);
442	}	528	}
443		529
		530	static void
		531	allocate_stack (Coro__State ctx, int alloc)
		532	{
		533	coro_stack *stack;
		534
		535	New (0, stack, 1, coro_stack);
		536
		537	stack->refcnt = 1;
		538	stack->usecnt = 1;
		539	stack->gencnt = ctx->gencnt = 0;
		540	if (alloc)
		541	{
		542	#ifdef HAVE_MMAP
		543	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
		544	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
		545	if (stack->sptr == (void *)-1)
		546	#endif
		547	{
		548	/FIXME//D//* reasonable stack size! */
		549	stack->ssize = -4096 * sizeof (long);
		550	New (0, stack->sptr, 4096, long);
		551	}
		552	}
		553	else
		554	stack->sptr = 0;
		555
		556	ctx->stack = stack;
		557	}
		558
		559	static void
		560	deallocate_stack (Coro__State ctx)
		561	{
		562	coro_stack *stack = ctx->stack;
		563
		564	ctx->stack = 0;
		565
		566	if (stack)
		567	{
		568	if (!--stack->refcnt)
		569	{
		570	#ifdef HAVE_MMAP
		571	if (stack->ssize > 0 && stack->sptr)
		572	munmap (stack->sptr, stack->ssize);
		573	else
		574	#else
		575	Safefree (stack->sptr);
		576	#endif
		577	Safefree (stack);
		578	}
		579	else if (ctx->gencnt == stack->gencnt)
		580	--stack->usecnt;
		581	}
		582	}
		583
		584	static void
		585	setup_coro (void *arg)
		586	{
		587	/*
		588	* emulate part of the perl startup here.
		589	*/
		590	dSP;
		591	Coro__State ctx = (Coro__State)arg;
		592	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		593
		594	coro_init_stacks (aTHX);
		595	/PL_curcop = 0;/
		596	/PL_in_eval = PL_in_eval;/ /* inherit */
		597	SvREFCNT_dec (GvAV (PL_defgv));
		598	GvAV (PL_defgv) = ctx->args;
		599
		600	SPAGAIN;
		601
		602	if (ctx->stack)
		603	{
		604	ctx->cursp = 0;
		605
		606	PUSHMARK(SP);
		607	PUTBACK;
		608	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		609
		610	if (SvTRUE (ERRSV))
		611	croak (NULL);
		612	else
		613	croak ("FATAL: CCTXT coroutine returned!");
		614	}
		615	else
		616	{
		617	UNOP myop;
		618
		619	PL_op = (OP *)&myop;
		620
		621	Zero(&myop, 1, UNOP);
		622	myop.op_next = Nullop;
		623	myop.op_flags = OPf_WANT_VOID;
		624
		625	PUSHMARK(SP);
		626	XPUSHs (sub_init);
		627	/*
		628	* the next line is slightly wrong, as PL_op->op_next
		629	* is actually being executed so we skip the first op.
		630	* that doesn't matter, though, since it is only
		631	* pp_nextstate and we never return...
		632	* ah yes, and I don't care anyways ;)
		633	*/
		634	PUTBACK;
		635	PL_op = pp_entersub();
		636	SPAGAIN;
		637
		638	ENTER; /* necessary e.g. for dounwind */
		639	}
		640	}
		641
		642	static void
		643	continue_coro (void *arg)
		644	{
		645	/*
		646	* this is a _very_ stripped down perl interpreter ;)
		647	*/
		648	Coro__State ctx = (Coro__State)arg;
		649
		650	/FIXME//* must set up top_env here */
		651	ctx->cursp = 0;
		652	PL_op = PL_op->op_next;
		653	CALLRUNOPS(aTHX);
		654
		655	abort ();
		656	}
		657
444	STATIC void	658	STATIC void
445	transfer(pTHX_ struct coro prev, struct coro next, int flags)	659	transfer(pTHX_ struct coro prev, struct coro next, int flags)
446	{	660	{
447	dSP;	661	dSTACKLEVEL;
		662	static struct coro *xnext;
448		663
449	if (prev != next)	664	if (prev != next)
450	{	665	{
451	/*	666	xnext = next;
452	* this could be done in newprocess which would lead to	667
453	* extremely elegant and fast (just SAVE/LOAD)
454	* code here, but lazy allocation of stacks has also
455	* some virtues and the overhead of the if() is nil.
456	*/
457	if (next->mainstack)	668	if (next->mainstack)
458	{	669	{
459	SAVE (prev, flags);	670	SAVE (prev, flags);
460	LOAD (next);	671	LOAD (next);
		672
461	/* mark this state as in-use */	673	/* mark this state as in-use */
462	next->mainstack = 0;	674	next->mainstack = 0;
463	next->tmps_ix = -2;	675	next->tmps_ix = -2;
		676
		677	/* stacklevel changed? if yes, grab the stack for us! */
		678	if (flags & TRANSFER_SAVE_CCTXT)
		679	{
		680	if (!prev->stack)
		681	allocate_stack (prev, 0);
		682	else if (prev->cursp != stacklevel
		683	&& prev->stack->usecnt > 1)
		684	{
		685	prev->gencnt = ++prev->stack->gencnt;
		686	prev->stack->usecnt = 1;
		687	}
		688
		689	/* has our stack been invalidated? */
		690	if (next->stack && next->stack->gencnt != next->gencnt)
		691	{
		692	deallocate_stack (next);
		693	allocate_stack (next, 1);
		694	coro_create (&(next->stack->cctx),
		695	continue_coro, (void *)next,
		696	next->stack->sptr, labs (next->stack->ssize));
		697	}
		698
		699	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		700	/* don't add any code here */
		701	}
		702
464	}	703	}
465	else if (next->tmps_ix == -2)	704	else if (next->tmps_ix == -2)
466	{
467	croak ("tried to transfer to running coroutine");	705	croak ("tried to transfer to running coroutine");
468	}
469	else	706	else
470	{	707	{
471	/*
472	* emulate part of the perl startup here.
473	*/
474	UNOP myop;
475
476	SAVE (prev, -1); /* first get rid of the old state */	708	SAVE (prev, -1); /* first get rid of the old state */
477		709
478	init_stacks (); /* from perl.c */	710	if (flags & TRANSFER_SAVE_CCTXT)
479	SPAGAIN;
480
481	PL_op = (OP *)&myop;
482	/PL_curcop = 0;/
483	SvREFCNT_dec (GvAV (PL_defgv));
484	GvAV (PL_defgv) = next->args;
485
486	Zero(&myop, 1, UNOP);
487	myop.op_next = Nullop;
488	myop.op_flags = OPf_WANT_VOID;
489
490	PUSHMARK(SP);
491	XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
492	/*
493	* the next line is slightly wrong, as PL_op->op_next
494	* is actually being executed so we skip the first op.
495	* that doesn't matter, though, since it is only
496	* pp_nextstate and we never return...
497	* ah yes, and I don't care anyways ;)
498	*/	711	{
499	PUTBACK;	712	if (!prev->stack)
500	PL_op = pp_entersub(aTHX);	713	allocate_stack (prev, 0);
501	SPAGAIN;
502		714
503	ENTER; /* necessary e.g. for dounwind */	715	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		716	{
		717	setup_coro (next);
		718
		719	prev->stack->refcnt++;
		720	prev->stack->usecnt++;
		721	next->stack = prev->stack;
		722	next->gencnt = prev->gencnt;
		723	}
		724	else
		725	{
		726	allocate_stack (next, 1);
		727	coro_create (&(next->stack->cctx),
		728	setup_coro, (void *)next,
		729	next->stack->sptr, labs (next->stack->ssize));
		730	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		731	/* don't add any code here */
		732	}
		733	}
		734	else
		735	setup_coro (next);
504	}	736	}
505	}	737	}
		738
		739	/*
		740	* xnext is now either prev or next, depending on wether
		741	* we switched the c stack or not. that's why i use a global
		742	* variable, that should become thread-specific at one point.
		743	*/
		744	xnext->cursp = stacklevel;
		745	}
		746
		747	static struct coro *
		748	sv_to_coro (SV arg, const char funcname, const char *varname)
		749	{
		750	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
		751	{
		752	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
		753
		754	if (!he)
		755	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
		756
		757	arg = HeVAL(he);
		758	}
		759
		760	/* must also be changed inside Coro::Cont::yield */
		761	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
		762	return (struct coro ) SvIV((SV)SvRV(arg));
		763
		764	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
		765	/NORETURN/
		766	}
		767
		768	static void
		769	api_transfer(pTHX_ SV prev, SV next, int flags)
		770	{
		771	transfer(aTHX_
		772	sv_to_coro (prev, "Coro::transfer", "prev"),
		773	sv_to_coro (next, "Coro::transfer", "next"),
		774	flags);
		775	}
		776
		777	/ Coro ******************************************************************/
		778
		779	#define PRIO_MAX 3
		780	#define PRIO_HIGH 1
		781	#define PRIO_NORMAL 0
		782	#define PRIO_LOW -1
		783	#define PRIO_IDLE -3
		784	#define PRIO_MIN -4
		785
		786	/* for Coro.pm */
		787	static GV coro_current, coro_idle;
		788	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		789	static int coro_nready;
		790
		791	static void
		792	coro_enq (SV *sv)
		793	{
		794	if (SvROK (sv))
		795	{
		796	SV *hv = SvRV (sv);
		797	if (SvTYPE (hv) == SVt_PVHV)
		798	{
		799	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
		800	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		801
		802	prio = prio > PRIO_MAX ? PRIO_MAX
		803	: prio < PRIO_MIN ? PRIO_MIN
		804	: prio;
		805
		806	av_push (coro_ready [prio - PRIO_MIN], sv);
		807	coro_nready++;
		808
		809	return;
		810	}
		811	}
		812
		813	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		814	}
		815
		816	static SV *
		817	coro_deq (int min_prio)
		818	{
		819	int prio = PRIO_MAX - PRIO_MIN;
		820
		821	min_prio -= PRIO_MIN;
		822	if (min_prio < 0)
		823	min_prio = 0;
		824
		825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		826	if (av_len (coro_ready[prio]) >= 0)
		827	{
		828	coro_nready--;
		829	return av_shift (coro_ready[prio]);
		830	}
		831
		832	return 0;
		833	}
		834
		835	static void
		836	api_ready (SV *coro)
		837	{
		838	coro_enq (SvREFCNT_inc (coro));
		839	}
		840
		841	static void
		842	api_schedule (int cede)
		843	{
		844	SV prev, next;
		845
		846	prev = GvSV (coro_current);
		847
		848	if (cede)
		849	coro_enq (SvREFCNT_inc (prev));
		850
		851	next = coro_deq (PRIO_MIN);
		852
		853	if (!next)
		854	next = SvREFCNT_inc (GvSV (coro_idle));
		855
		856	GvSV (coro_current) = SvREFCNT_inc (next);
		857	transfer (aTHX_
		858	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
		859	sv_to_coro (next, "Coro::schedule", "next coroutine"),
		860	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		861	SvREFCNT_dec (next);
		862	SvREFCNT_dec (prev);
506	}	863	}
507		864
508	MODULE = Coro::State PACKAGE = Coro::State	865	MODULE = Coro::State PACKAGE = Coro::State
509		866
510	PROTOTYPES: ENABLE	867	PROTOTYPES: ENABLE
511		868
512	BOOT:	869	BOOT:
513	{ /* {} necessary for stoopid perl-5.6.x */	870	{ /* {} necessary for stoopid perl-5.6.x */
		871	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		872	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
514	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	873	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
515		874
516	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	875	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
517	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	876	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
518	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	877	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		878	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
519		879
520	if (!padlist_cache)	880	if (!padlist_cache)
521	padlist_cache = newHV ();	881	padlist_cache = newHV ();
		882
		883	main_mainstack = PL_mainstack;
		884
		885	coroapi.ver = CORO_API_VERSION;
		886	coroapi.transfer = api_transfer;
522	}	887	}
523		888
524	Coro::State	889	Coro::State
525	_newprocess(args)	890	_newprocess(args)
526	SV * args	891	SV * args
…		…
531	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	896	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
532	croak ("Coro::State::_newprocess expects an arrayref");	897	croak ("Coro::State::_newprocess expects an arrayref");
533		898
534	New (0, coro, 1, struct coro);	899	New (0, coro, 1, struct coro);
535		900
		901	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
536	coro->mainstack = 0; /* actual work is done inside transfer */	902	coro->mainstack = 0; /* actual work is done inside transfer */
537	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	903	coro->stack = 0;
538		904
539	RETVAL = coro;	905	RETVAL = coro;
540	OUTPUT:	906	OUTPUT:
541	RETVAL	907	RETVAL
542		908
543	void	909	void
544	transfer(prev, next, flags = SAVE_DEFAV)	910	transfer(prev, next, flags)
545	Coro::State_or_hashref prev	911	Coro::State_or_hashref prev
546	Coro::State_or_hashref next	912	Coro::State_or_hashref next
547	int flags	913	int flags
548	PROTOTYPE: @	914	PROTOTYPE: @
549	CODE:	915	CODE:
550		916	PUTBACK;
551	transfer (aTHX_ prev, next, flags);	917	transfer (aTHX_ prev, next, flags);
		918	SPAGAIN;
552		919
553	void	920	void
554	DESTROY(coro)	921	DESTROY(coro)
555	Coro::State coro	922	Coro::State coro
556	CODE:	923	CODE:
557		924
558	if (coro->mainstack)	925	if (coro->mainstack && coro->mainstack != main_mainstack)
559	{	926	{
560	struct coro temp;	927	struct coro temp;
561		928
		929	PUTBACK;
562	SAVE(aTHX_ (&temp), SAVE_ALL);	930	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
563	LOAD(aTHX_ coro);	931	LOAD(aTHX_ coro);
		932	SPAGAIN;
564		933
565	destroy_stacks ();	934	destroy_stacks (aTHX);
566		935
567	LOAD((&temp)); /* this will get rid of defsv etc.. */	936	LOAD((&temp)); /* this will get rid of defsv etc.. */
		937	SPAGAIN;
		938
		939	coro->mainstack = 0;
568	}	940	}
		941
		942	deallocate_stack (coro);
569		943
570	Safefree (coro);	944	Safefree (coro);
571		945
572	void	946	void
573	flush()	947	flush()
574	CODE:	948	CODE:
575	#ifdef MAY_FLUSH	949	#ifdef MAY_FLUSH
576	flush_padlist_cache ();	950	flush_padlist_cache ();
577	#endif	951	#endif
578		952
		953	void
		954	_exit(code)
		955	int code
		956	PROTOTYPE: $
		957	CODE:
		958	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		959	_exit (code);
		960	#else
		961	signal (SIGTERM, SIG_DFL);
		962	raise (SIGTERM);
		963	exit (code);
		964	#endif
		965
579	MODULE = Coro::State PACKAGE = Coro::Cont	966	MODULE = Coro::State PACKAGE = Coro::Cont
580		967
581	# this is dirty and should be in it's own .xs	968	# this is slightly dirty (should expose a c-level api)
582		969
583	void	970	void
584	result(...)	971	yield(...)
585	PROTOTYPE: @	972	PROTOTYPE: @
586	CODE:	973	CODE:
587	static SV *returnstk;	974	static SV *returnstk;
588	SV *sv;	975	SV *sv;
589	AV *defav = GvAV (PL_defgv);	976	AV *defav = GvAV (PL_defgv);
590	struct coro prev, next;	977	struct coro prev, next;
591		978
592	if (!returnstk)	979	if (!returnstk)
593	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	980	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
594		981
595	/* set up @_ */	982	/* set up @_ -- ugly */
596	av_clear (defav);	983	av_clear (defav);
597	av_fill (defav, items - 1);	984	av_fill (defav, items - 1);
598	while (items--)	985	while (items--)
599	av_store (defav, items, SvREFCNT_inc (ST(items)));	986	av_store (defav, items, SvREFCNT_inc (ST(items)));
600		987
601	mg_get (returnstk); /* isn't documentation wrong for mg_get? */	988	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
602	sv = av_pop ((AV *)SvRV (returnstk));	989	sv = av_pop ((AV *)SvRV (returnstk));
603	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));	990	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
604	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	991	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
605	SvREFCNT_dec (sv);	992	SvREFCNT_dec (sv);
		993
606	transfer(prev, next, 0);	994	transfer(aTHX_ prev, next, 0);
607		995
		996	MODULE = Coro::State PACKAGE = Coro
		997
		998	# this is slightly dirty (should expose a c-level api)
		999
		1000	BOOT:
		1001	{
		1002	int i;
		1003	HV *stash = gv_stashpv ("Coro", TRUE);
		1004
		1005	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1006	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1007	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1008	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1009	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1010	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1011
		1012	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1013	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1014
		1015	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1016	coro_ready[i] = newAV ();
		1017
		1018	{
		1019	SV *sv = perl_get_sv("Coro::API", 1);
		1020
		1021	coroapi.schedule = api_schedule;
		1022	coroapi.ready = api_ready;
		1023	coroapi.nready = &coro_nready;
		1024	coroapi.current = coro_current;
		1025
		1026	GCoroAPI = &coroapi;
		1027	sv_setiv(sv, (IV)&coroapi);
		1028	SvREADONLY_on(sv);
		1029	}
		1030	}
		1031
		1032	void
		1033	ready(self)
		1034	SV * self
		1035	CODE:
		1036	api_ready (self);
		1037
		1038	int
		1039	nready(...)
		1040	PROTOTYPE:
		1041	CODE:
		1042	RETVAL = coro_nready;
		1043	OUTPUT:
		1044	RETVAL
		1045
		1046	void
		1047	schedule(...)
		1048	PROTOTYPE:
		1049	ALIAS:
		1050	cede = 1
		1051	CODE:
		1052	api_schedule (ix);
		1053

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Comparing Coro/Coro/State.xs (file contents): Revision 1.9 by root, Sat Jul 21 02:49:09 2001 UTC vs. Revision 1.29 by root, Sat Aug 25 21:40:34 2001 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.9 by root, Sat Jul 21 02:49:09 2001 UTC vs.
Revision 1.29 by root, Sat Aug 25 21:40:34 2001 UTC