[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 1.38 by root, Wed Nov 7 00:21:06 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_ANONYMOUS
		13	# ifdef MAP_ANON
		14	# define MAP_ANONYMOUS MAP_ANON
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 IN_DESTRUCT (PL_main_cv == Nullcv)
		32
		33	#define labs(l) ((l) >= 0 ? (l) : -(l))
		34
		35	#include "CoroAPI.h"
		36
		37	static struct CoroAPI coroapi;
		38
		39	/* this is actually not only the c stack but also c registers etc... */
		40	typedef struct {
		41	int refcnt; /* pointer reference counter */
		42	int usecnt; /* shared by how many coroutines */
		43	int gencnt; /* generation counter */
		44
		45	coro_context cctx;
		46
		47	void *sptr;
		48	long ssize; /* positive == mmap, otherwise malloc */
		49	} coro_stack;
20		50
21	struct coro {	51	struct coro {
		52	/* the optional C context */
		53	coro_stack *stack;
		54	void *cursp;
		55	int gencnt;
		56
22	/* optionally saved, might be zero */	57	/* optionally saved, might be zero */
23	AV *defav;	58	AV *defav;
24	SV *defsv;	59	SV *defsv;
25	SV *errsv;	60	SV *errsv;
		61	/* TODO: PL_pmop might be nice && effortless to save. */
26		62
27	/* saved global state not related to stacks */	63	/* saved global state not related to stacks */
28	U8 dowarn;	64	U8 dowarn;
		65	I32 in_eval;
29		66
30	/* the stacks and related info (callchain etc..) */	67	/* the stacks and related info (callchain etc..) */
31	PERL_SI *curstackinfo;	68	PERL_SI *curstackinfo;
32	AV *curstack;	69	AV *curstack;
33	AV *mainstack;	70	AV *mainstack;
51	I32 savestack_max;	88	I32 savestack_max;
52	OP **retstack;	89	OP **retstack;
53	I32 retstack_ix;	90	I32 retstack_ix;
54	I32 retstack_max;	91	I32 retstack_max;
55	COP *curcop;	92	COP *curcop;
		93	JMPENV *top_env;
56		94
57	/* data associated with this coroutine (initial args) */	95	/* data associated with this coroutine (initial args) */
58	AV *args;	96	AV *args;
59	};	97	};
60		98
61	typedef struct coro *Coro__State;	99	typedef struct coro *Coro__State;
62	typedef struct coro *Coro__State_or_hashref;	100	typedef struct coro *Coro__State_or_hashref;
63		101
		102	static AV main_mainstack; / used to differentiate between $main and others */
		103	static HV *coro_state_stash;
		104	static SV *ucoro_state_sv;
		105	static U32 ucoro_state_hash;
64	static HV *padlist_cache;	106	static HV *padlist_cache;
65		107
66	/* mostly copied from op.c:cv_clone2 */	108	/* mostly copied from op.c:cv_clone2 */
67	STATIC AV *	109	STATIC AV *
68	clone_padlist (AV *protopadlist)	110	clone_padlist (AV *protopadlist)
…		…
156		198
157	return newpadlist;	199	return newpadlist;
158	}	200	}
159		201
160	#ifdef MAY_FLUSH	202	#ifdef MAY_FLUSH
161	STATIC AV *	203	STATIC void
162	free_padlist (AV *padlist)	204	free_padlist (AV *padlist)
163	{	205	{
164	/* may be during global destruction */	206	/* may be during global destruction */
165	if (SvREFCNT(padlist))	207	if (SvREFCNT(padlist))
166	{	208	{
…		…
231	#endif	273	#endif
232		274
233	#define SB do {	275	#define SB do {
234	#define SE } while (0)	276	#define SE } while (0)
235		277
236	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	278	#define LOAD(state) load_state(aTHX_ (state));
237	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	279	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
238		280
239	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	281	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
240		282
241	static void	283	static void
242	load_state(pTHX_ Coro__State c)	284	load_state(pTHX_ Coro__State c)
243	{	285	{
244	PL_dowarn = c->dowarn;	286	PL_dowarn = c->dowarn;
		287	PL_in_eval = c->in_eval;
245		288
246	PL_curstackinfo = c->curstackinfo;	289	PL_curstackinfo = c->curstackinfo;
247	PL_curstack = c->curstack;	290	PL_curstack = c->curstack;
248	PL_mainstack = c->mainstack;	291	PL_mainstack = c->mainstack;
249	PL_stack_sp = c->stack_sp;	292	PL_stack_sp = c->stack_sp;
…		…
266	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
267	PL_retstack = c->retstack;	310	PL_retstack = c->retstack;
268	PL_retstack_ix = c->retstack_ix;	311	PL_retstack_ix = c->retstack_ix;
269	PL_retstack_max = c->retstack_max;	312	PL_retstack_max = c->retstack_max;
270	PL_curcop = c->curcop;	313	PL_curcop = c->curcop;
		314	PL_top_env = c->top_env;
271		315
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	316	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	317	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	318	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275		319
…		…
302	save_state(pTHX_ Coro__State c, int flags)	346	save_state(pTHX_ Coro__State c, int flags)
303	{	347	{
304	{	348	{
305	dSP;	349	dSP;
306	I32 cxix = cxstack_ix;	350	I32 cxix = cxstack_ix;
		351	PERL_CONTEXT *ccstk = cxstack;
307	PERL_SI *top_si = PL_curstackinfo;	352	PERL_SI *top_si = PL_curstackinfo;
308	PERL_CONTEXT *ccstk = cxstack;
309		353
310	/*	354	/*
311	* the worst thing you can imagine happens first - we have to save	355	* the worst thing you can imagine happens first - we have to save
312	* (and reinitialize) all cv's in the whole callchain :(	356	* (and reinitialize) all cv's in the whole callchain :(
313	*/	357	*/
314		358
315	PUSHs (Nullsv);	359	PUSHs (Nullsv);
316	/* this loop was inspired by pp_caller */	360	/* this loop was inspired by pp_caller */
317	for (;;)	361	for (;;)
318	{	362	{
319	do	363	while (cxix >= 0)
320	{	364	{
321	PERL_CONTEXT *cx = &ccstk[cxix--];	365	PERL_CONTEXT *cx = &ccstk[cxix--];
322		366
323	if (CxTYPE(cx) == CXt_SUB)	367	if (CxTYPE(cx) == CXt_SUB)
324	{	368	{
…		…
350	/* I never used formats, so how should I know how these are implemented? */	394	/* I never used formats, so how should I know how these are implemented? */
351	/* my bold guess is as a simple, plain sub... */	395	/* my bold guess is as a simple, plain sub... */
352	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	396	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
353	}	397	}
354	}	398	}
355	while (cxix >= 0);
356		399
357	if (top_si->si_type == PERLSI_MAIN)	400	if (top_si->si_type == PERLSI_MAIN)
358	break;	401	break;
359		402
360	top_si = top_si->si_prev;	403	top_si = top_si->si_prev;
…		…
363	}	406	}
364		407
365	PUTBACK;	408	PUTBACK;
366	}	409	}
367		410
368	c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	411	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
369	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	412	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
370	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	413	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
371		414
372	c->dowarn = PL_dowarn;	415	c->dowarn = PL_dowarn;
		416	c->in_eval = PL_in_eval;
373		417
374	c->curstackinfo = PL_curstackinfo;	418	c->curstackinfo = PL_curstackinfo;
375	c->curstack = PL_curstack;	419	c->curstack = PL_curstack;
376	c->mainstack = PL_mainstack;	420	c->mainstack = PL_mainstack;
377	c->stack_sp = PL_stack_sp;	421	c->stack_sp = PL_stack_sp;
…		…
394	c->savestack_max = PL_savestack_max;	438	c->savestack_max = PL_savestack_max;
395	c->retstack = PL_retstack;	439	c->retstack = PL_retstack;
396	c->retstack_ix = PL_retstack_ix;	440	c->retstack_ix = PL_retstack_ix;
397	c->retstack_max = PL_retstack_max;	441	c->retstack_max = PL_retstack_max;
398	c->curcop = PL_curcop;	442	c->curcop = PL_curcop;
		443	c->top_env = PL_top_env;
		444	}
		445
		446	/*
		447	* allocate various perl stacks. This is an exact copy
		448	* of perl.c:init_stacks, except that it uses less memory
		449	* on the assumption that coroutines do not usually need
		450	* a lot of stackspace.
		451	*/
		452	STATIC void
		453	coro_init_stacks (pTHX)
		454	{
		455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		456	PL_curstackinfo->si_type = PERLSI_MAIN;
		457	PL_curstack = PL_curstackinfo->si_stack;
		458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		459
		460	PL_stack_base = AvARRAY(PL_curstack);
		461	PL_stack_sp = PL_stack_base;
		462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		463
		464	New(50,PL_tmps_stack,96,SV*);
		465	PL_tmps_floor = -1;
		466	PL_tmps_ix = -1;
		467	PL_tmps_max = 96;
		468
		469	New(54,PL_markstack,16,I32);
		470	PL_markstack_ptr = PL_markstack;
		471	PL_markstack_max = PL_markstack + 16;
		472
		473	SET_MARK_OFFSET;
		474
		475	New(54,PL_scopestack,16,I32);
		476	PL_scopestack_ix = 0;
		477	PL_scopestack_max = 16;
		478
		479	New(54,PL_savestack,96,ANY);
		480	PL_savestack_ix = 0;
		481	PL_savestack_max = 96;
		482
		483	New(54,PL_retstack,8,OP*);
		484	PL_retstack_ix = 0;
		485	PL_retstack_max = 8;
399	}	486	}
400		487
401	/*	488	/*
402	* destroy the stacks, the callchain etc...	489	* destroy the stacks, the callchain etc...
403	* still there is a memleak of 128 bytes...	490	* still there is a memleak of 128 bytes...
404	*/	491	*/
405	STATIC void	492	STATIC void
406	destroy_stacks(pTHX)	493	destroy_stacks(pTHX)
407	{	494	{
		495	if (!IN_DESTRUCT)
		496	{
408	/* is this ugly, I ask? */	497	/* is this ugly, I ask? */
409	while (PL_scopestack_ix)	498	while (PL_scopestack_ix)
410	LEAVE;	499	LEAVE;
411		500
412	/* sure it is, but more important: is it correct?? :/ */	501	/* sure it is, but more important: is it correct?? :/ */
413	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	502	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
414	FREETMPS;	503	FREETMPS;
		504	}
415		505
416	while (PL_curstackinfo->si_next)	506	while (PL_curstackinfo->si_next)
417	PL_curstackinfo = PL_curstackinfo->si_next;	507	PL_curstackinfo = PL_curstackinfo->si_next;
418		508
419	while (PL_curstackinfo)	509	while (PL_curstackinfo)
…		…
424	dSP;	514	dSP;
425	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
426	PUTBACK; /* possibly superfluous */	516	PUTBACK; /* possibly superfluous */
427	}	517	}
428		518
		519	if (!IN_DESTRUCT)
		520	{
429	dounwind(-1);	521	dounwind(-1);
430
431	SvREFCNT_dec(PL_curstackinfo->si_stack);	522	SvREFCNT_dec(PL_curstackinfo->si_stack);
		523	}
		524
432	Safefree(PL_curstackinfo->si_cxstack);	525	Safefree(PL_curstackinfo->si_cxstack);
433	Safefree(PL_curstackinfo);	526	Safefree(PL_curstackinfo);
434	PL_curstackinfo = p;	527	PL_curstackinfo = p;
435	}	528	}
436		529
…		…
439	Safefree(PL_scopestack);	532	Safefree(PL_scopestack);
440	Safefree(PL_savestack);	533	Safefree(PL_savestack);
441	Safefree(PL_retstack);	534	Safefree(PL_retstack);
442	}	535	}
443		536
		537	static void
		538	allocate_stack (Coro__State ctx, int alloc)
		539	{
		540	coro_stack *stack;
		541
		542	New (0, stack, 1, coro_stack);
		543
		544	stack->refcnt = 1;
		545	stack->usecnt = 1;
		546	stack->gencnt = ctx->gencnt = 0;
		547	if (alloc)
		548	{
		549	#if HAVE_MMAP
		550	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
		551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		552	if (stack->sptr == (void *)-1)
		553	#endif
		554	{
		555	/FIXME//D//* reasonable stack size! */
		556	stack->ssize = -4096 * sizeof (long);
		557	New (0, stack->sptr, 4096, long);
		558	}
		559	}
		560	else
		561	stack->sptr = 0;
		562
		563	ctx->stack = stack;
		564	}
		565
		566	static void
		567	deallocate_stack (Coro__State ctx)
		568	{
		569	coro_stack *stack = ctx->stack;
		570
		571	ctx->stack = 0;
		572
		573	if (stack)
		574	{
		575	if (!--stack->refcnt)
		576	{
		577	#ifdef HAVE_MMAP
		578	if (stack->ssize > 0 && stack->sptr)
		579	munmap (stack->sptr, stack->ssize);
		580	else
		581	#else
		582	Safefree (stack->sptr);
		583	#endif
		584	Safefree (stack);
		585	}
		586	else if (ctx->gencnt == stack->gencnt)
		587	--stack->usecnt;
		588	}
		589	}
		590
		591	static void
		592	setup_coro (void *arg)
		593	{
		594	/*
		595	* emulate part of the perl startup here.
		596	*/
		597	dSP;
		598	Coro__State ctx = (Coro__State)arg;
		599	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		600
		601	coro_init_stacks (aTHX);
		602	/PL_curcop = 0;/
		603	/PL_in_eval = PL_in_eval;/ /* inherit */
		604	SvREFCNT_dec (GvAV (PL_defgv));
		605	GvAV (PL_defgv) = ctx->args;
		606
		607	SPAGAIN;
		608
		609	if (ctx->stack)
		610	{
		611	ctx->cursp = 0;
		612
		613	PUSHMARK(SP);
		614	PUTBACK;
		615	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		616
		617	if (SvTRUE (ERRSV))
		618	croak (NULL);
		619	else
		620	croak ("FATAL: CCTXT coroutine returned!");
		621	}
		622	else
		623	{
		624	UNOP myop;
		625
		626	PL_op = (OP *)&myop;
		627
		628	Zero(&myop, 1, UNOP);
		629	myop.op_next = Nullop;
		630	myop.op_flags = OPf_WANT_VOID;
		631
		632	PUSHMARK(SP);
		633	XPUSHs (sub_init);
		634	/*
		635	* the next line is slightly wrong, as PL_op->op_next
		636	* is actually being executed so we skip the first op.
		637	* that doesn't matter, though, since it is only
		638	* pp_nextstate and we never return...
		639	* ah yes, and I don't care anyways ;)
		640	*/
		641	PUTBACK;
		642	PL_op = pp_entersub();
		643	SPAGAIN;
		644
		645	ENTER; /* necessary e.g. for dounwind */
		646	}
		647	}
		648
		649	static void
		650	continue_coro (void *arg)
		651	{
		652	/*
		653	* this is a _very_ stripped down perl interpreter ;)
		654	*/
		655	Coro__State ctx = (Coro__State)arg;
		656	JMPENV coro_start_env;
		657
		658	/* same as JMPENV_BOOTSTRAP */
		659	Zero(&coro_start_env, 1, JMPENV);
		660	coro_start_env.je_ret = -1;
		661	coro_start_env.je_mustcatch = TRUE;
		662	PL_top_env = &coro_start_env;
		663
		664	ctx->cursp = 0;
		665	PL_op = PL_op->op_next;
		666	CALLRUNOPS(aTHX);
		667
		668	abort ();
		669	}
		670
444	STATIC void	671	STATIC void
445	transfer(pTHX_ struct coro prev, struct coro next, int flags)	672	transfer(pTHX_ struct coro prev, struct coro next, int flags)
446	{	673	{
447	dSP;	674	dSTACKLEVEL;
		675	static struct coro *xnext;
448		676
449	if (prev != next)	677	if (prev != next)
450	{	678	{
451	/*	679	xnext = next;
452	* this could be done in newprocess which would lead to	680
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)	681	if (next->mainstack)
458	{	682	{
459	SAVE (prev, flags);	683	SAVE (prev, flags);
460	LOAD (next);	684	LOAD (next);
		685
461	/* mark this state as in-use */	686	/* mark this state as in-use */
462	next->mainstack = 0;	687	next->mainstack = 0;
463	next->tmps_ix = -2;	688	next->tmps_ix = -2;
		689
		690	/* stacklevel changed? if yes, grab the stack for us! */
		691	if (flags & TRANSFER_SAVE_CCTXT)
		692	{
		693	if (!prev->stack)
		694	allocate_stack (prev, 0);
		695	else if (prev->cursp != stacklevel
		696	&& prev->stack->usecnt > 1)
		697	{
		698	prev->gencnt = ++prev->stack->gencnt;
		699	prev->stack->usecnt = 1;
		700	}
		701
		702	/* has our stack been invalidated? */
		703	if (next->stack && next->stack->gencnt != next->gencnt)
		704	{
		705	deallocate_stack (next);
		706	allocate_stack (next, 1);
		707	coro_create (&(next->stack->cctx),
		708	continue_coro, (void *)next,
		709	next->stack->sptr, labs (next->stack->ssize));
		710	}
		711
		712	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		713	/* don't add any code here */
		714	}
		715
464	}	716	}
465	else if (next->tmps_ix == -2)	717	else if (next->tmps_ix == -2)
466	{
467	croak ("tried to transfer to running coroutine");	718	croak ("tried to transfer to running coroutine");
468	}
469	else	719	else
470	{	720	{
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 */	721	SAVE (prev, -1); /* first get rid of the old state */
477		722
478	init_stacks (); /* from perl.c */	723	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	*/	724	{
499	PUTBACK;	725	if (!prev->stack)
500	PL_op = pp_entersub(aTHX);	726	allocate_stack (prev, 0);
501	SPAGAIN;
502		727
503	ENTER; /* necessary e.g. for dounwind */	728	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		729	{
		730	setup_coro (next);
		731
		732	prev->stack->refcnt++;
		733	prev->stack->usecnt++;
		734	next->stack = prev->stack;
		735	next->gencnt = prev->gencnt;
		736	}
		737	else
		738	{
		739	allocate_stack (next, 1);
		740	coro_create (&(next->stack->cctx),
		741	setup_coro, (void *)next,
		742	next->stack->sptr, labs (next->stack->ssize));
		743	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		744	/* don't add any code here */
		745	}
		746	}
		747	else
		748	setup_coro (next);
		749	}
		750
		751	/*
		752	* xnext is now either prev or next, depending on wether
		753	* we switched the c stack or not. that's why i use a global
		754	* variable, that should become thread-specific at one point.
		755	*/
		756	xnext->cursp = stacklevel;
		757	}
		758	}
		759
		760	static struct coro *
		761	sv_to_coro (SV arg, const char funcname, const char *varname)
		762	{
		763	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
		764	{
		765	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
		766
		767	if (!he)
		768	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
		769
		770	arg = HeVAL(he);
		771	}
		772
		773	/* must also be changed inside Coro::Cont::yield */
		774	if (SvROK(arg) && SvOBJECT(SvRV(arg))
		775	&& SvSTASH(SvRV(arg)) == coro_state_stash)
		776	return (struct coro ) SvIV((SV)SvRV(arg));
		777
		778	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
		779	/NORETURN/
		780	}
		781
		782	static void
		783	api_transfer(pTHX_ SV prev, SV next, int flags)
		784	{
		785	transfer(aTHX_
		786	sv_to_coro (prev, "Coro::transfer", "prev"),
		787	sv_to_coro (next, "Coro::transfer", "next"),
		788	flags);
		789	}
		790
		791	/ Coro ******************************************************************/
		792
		793	#define PRIO_MAX 3
		794	#define PRIO_HIGH 1
		795	#define PRIO_NORMAL 0
		796	#define PRIO_LOW -1
		797	#define PRIO_IDLE -3
		798	#define PRIO_MIN -4
		799
		800	/* for Coro.pm */
		801	static GV coro_current, coro_idle;
		802	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		803	static int coro_nready;
		804
		805	static void
		806	coro_enq (SV *sv)
		807	{
		808	if (SvROK (sv))
		809	{
		810	SV *hv = SvRV (sv);
		811	if (SvTYPE (hv) == SVt_PVHV)
504	}	812	{
		813	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
		814	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		815
		816	prio = prio > PRIO_MAX ? PRIO_MAX
		817	: prio < PRIO_MIN ? PRIO_MIN
		818	: prio;
		819
		820	av_push (coro_ready [prio - PRIO_MIN], sv);
		821	coro_nready++;
		822
		823	return;
		824	}
		825	}
		826
		827	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		828	}
		829
		830	static SV *
		831	coro_deq (int min_prio)
		832	{
		833	int prio = PRIO_MAX - PRIO_MIN;
		834
		835	min_prio -= PRIO_MIN;
		836	if (min_prio < 0)
		837	min_prio = 0;
		838
		839	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		840	if (av_len (coro_ready[prio]) >= 0)
		841	{
		842	coro_nready--;
		843	return av_shift (coro_ready[prio]);
505	}	844	}
		845
		846	return 0;
		847	}
		848
		849	static void
		850	api_ready (SV *coro)
		851	{
		852	coro_enq (SvREFCNT_inc (coro));
		853	}
		854
		855	static void
		856	api_schedule (int cede)
		857	{
		858	SV prev, next;
		859
		860	prev = GvSV (coro_current);
		861
		862	if (cede)
		863	coro_enq (SvREFCNT_inc (prev));
		864
		865	next = coro_deq (PRIO_MIN);
		866
		867	if (!next)
		868	next = SvREFCNT_inc (GvSV (coro_idle));
		869
		870	GvSV (coro_current) = SvREFCNT_inc (next);
		871	transfer (aTHX_
		872	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
		873	sv_to_coro (next, "Coro::schedule", "next coroutine"),
		874	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		875	SvREFCNT_dec (next);
		876	SvREFCNT_dec (prev);
506	}	877	}
507		878
508	MODULE = Coro::State PACKAGE = Coro::State	879	MODULE = Coro::State PACKAGE = Coro::State
509		880
510	PROTOTYPES: ENABLE	881	PROTOTYPES: ENABLE
511		882
512	BOOT:	883	BOOT:
513	{ /* {} necessary for stoopid perl-5.6.x */	884	{ /* {} necessary for stoopid perl-5.6.x */
		885	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		886	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
514	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	887	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
515		888
516	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	889	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
517	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	890	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
518	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	891	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		892	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
519		893
520	if (!padlist_cache)	894	if (!padlist_cache)
521	padlist_cache = newHV ();	895	padlist_cache = newHV ();
		896
		897	main_mainstack = PL_mainstack;
		898
		899	coroapi.ver = CORO_API_VERSION;
		900	coroapi.transfer = api_transfer;
522	}	901	}
523		902
524	Coro::State	903	Coro::State
525	_newprocess(args)	904	_newprocess(args)
526	SV * args	905	SV * args
…		…
531	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	910	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
532	croak ("Coro::State::_newprocess expects an arrayref");	911	croak ("Coro::State::_newprocess expects an arrayref");
533		912
534	New (0, coro, 1, struct coro);	913	New (0, coro, 1, struct coro);
535		914
		915	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
536	coro->mainstack = 0; /* actual work is done inside transfer */	916	coro->mainstack = 0; /* actual work is done inside transfer */
537	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	917	coro->stack = 0;
538		918
539	RETVAL = coro;	919	RETVAL = coro;
540	OUTPUT:	920	OUTPUT:
541	RETVAL	921	RETVAL
542		922
543	void	923	void
544	transfer(prev, next, flags = SAVE_DEFAV)	924	transfer(prev, next, flags)
545	Coro::State_or_hashref prev	925	Coro::State_or_hashref prev
546	Coro::State_or_hashref next	926	Coro::State_or_hashref next
547	int flags	927	int flags
548	PROTOTYPE: @	928	PROTOTYPE: @
549	CODE:	929	CODE:
550		930	PUTBACK;
551	transfer (aTHX_ prev, next, flags);	931	transfer (aTHX_ prev, next, flags);
		932	SPAGAIN;
552		933
553	void	934	void
554	DESTROY(coro)	935	DESTROY(coro)
555	Coro::State coro	936	Coro::State coro
556	CODE:	937	CODE:
557		938
558	if (coro->mainstack)	939	if (coro->mainstack && coro->mainstack != main_mainstack)
559	{	940	{
560	struct coro temp;	941	struct coro temp;
561		942
		943	PUTBACK;
562	SAVE(aTHX_ (&temp), SAVE_ALL);	944	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
563	LOAD(aTHX_ coro);	945	LOAD(aTHX_ coro);
		946	SPAGAIN;
564		947
565	destroy_stacks ();	948	destroy_stacks (aTHX);
566		949
567	LOAD((&temp)); /* this will get rid of defsv etc.. */	950	LOAD((&temp)); /* this will get rid of defsv etc.. */
		951	SPAGAIN;
		952
		953	coro->mainstack = 0;
568	}	954	}
		955
		956	deallocate_stack (coro);
569		957
570	Safefree (coro);	958	Safefree (coro);
571		959
572	void	960	void
573	flush()	961	flush()
574	CODE:	962	CODE:
575	#ifdef MAY_FLUSH	963	#ifdef MAY_FLUSH
576	flush_padlist_cache ();	964	flush_padlist_cache ();
577	#endif	965	#endif
578		966
		967	void
		968	_exit(code)
		969	int code
		970	PROTOTYPE: $
		971	CODE:
		972	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		973	_exit (code);
		974	#else
		975	signal (SIGTERM, SIG_DFL);
		976	raise (SIGTERM);
		977	exit (code);
		978	#endif
		979
579	MODULE = Coro::State PACKAGE = Coro::Cont	980	MODULE = Coro::State PACKAGE = Coro::Cont
580		981
581	# this is dirty and should be in it's own .xs	982	# this is slightly dirty (should expose a c-level api)
582		983
583	void	984	void
584	result(...)	985	yield(...)
585	PROTOTYPE: @	986	PROTOTYPE: @
586	CODE:	987	CODE:
587	static SV *returnstk;	988	static SV *returnstk;
588	SV *sv;	989	SV *sv;
589	AV *defav = GvAV (PL_defgv);	990	AV *defav = GvAV (PL_defgv);
590	struct coro prev, next;	991	struct coro prev, next;
591		992
592	if (!returnstk)	993	if (!returnstk)
593	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	994	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
594		995
595	/* set up @_ */	996	/* set up @_ -- ugly */
596	av_clear (defav);	997	av_clear (defav);
597	av_fill (defav, items - 1);	998	av_fill (defav, items - 1);
598	while (items--)	999	while (items--)
599	av_store (defav, items, SvREFCNT_inc (ST(items)));	1000	av_store (defav, items, SvREFCNT_inc (ST(items)));
600		1001
601	mg_get (returnstk); /* isn't documentation wrong for mg_get? */	1002	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
602	sv = av_pop ((AV *)SvRV (returnstk));	1003	sv = av_pop ((AV *)SvRV (returnstk));
603	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));	1004	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)));	1005	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
605	SvREFCNT_dec (sv);	1006	SvREFCNT_dec (sv);
		1007
606	transfer(prev, next, 0);	1008	transfer(aTHX_ prev, next, 0);
607		1009
		1010	MODULE = Coro::State PACKAGE = Coro
		1011
		1012	# this is slightly dirty (should expose a c-level api)
		1013
		1014	BOOT:
		1015	{
		1016	int i;
		1017	HV *stash = gv_stashpv ("Coro", TRUE);
		1018
		1019	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1020	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1021	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1022	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1023	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1024	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1025
		1026	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1027	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1028
		1029	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1030	coro_ready[i] = newAV ();
		1031
		1032	{
		1033	SV *sv = perl_get_sv("Coro::API", 1);
		1034
		1035	coroapi.schedule = api_schedule;
		1036	coroapi.ready = api_ready;
		1037	coroapi.nready = &coro_nready;
		1038	coroapi.current = coro_current;
		1039
		1040	GCoroAPI = &coroapi;
		1041	sv_setiv(sv, (IV)&coroapi);
		1042	SvREADONLY_on(sv);
		1043	}
		1044	}
		1045
		1046	void
		1047	ready(self)
		1048	SV * self
		1049	PROTOTYPE: $
		1050	CODE:
		1051	api_ready (self);
		1052
		1053	int
		1054	nready(...)
		1055	PROTOTYPE:
		1056	CODE:
		1057	RETVAL = coro_nready;
		1058	OUTPUT:
		1059	RETVAL
		1060
		1061	void
		1062	schedule(...)
		1063	PROTOTYPE:
		1064	ALIAS:
		1065	cede = 1
		1066	CODE:
		1067	api_schedule (ix);
		1068

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing Coro/Coro/State.xs (file contents): Revision 1.9 by root, Sat Jul 21 02:49:09 2001 UTC vs. Revision 1.38 by root, Wed Nov 7 00:21:06 2001 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.9 by root, Sat Jul 21 02:49:09 2001 UTC vs.
Revision 1.38 by root, Wed Nov 7 00:21:06 2001 UTC