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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs.
Revision 1.31 by root, Sun Aug 26 16:36:08 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 SAVE_DEFAV 0x00000001	23	#define SUB_INIT "Coro::State::initialize"
14	#define SAVE_DEFSV 0x00000002	24	#define UCORO_STATE "_coro_state"
15	#define SAVE_ERRSV 0x00000004
16		25
17	#define SAVE_ALL -1	26	/* The next macro should declare a variable stacklevel that contains and approximation
		27	* to the current C stack pointer. Its property is that it changes with each call
		28	* and should be unique. */
		29	#define dSTACKLEVEL void *stacklevel = &stacklevel
		30
		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;
18		48
19	struct coro {	49	struct coro {
		50	/* the optional C context */
		51	coro_stack *stack;
		52	void *cursp;
		53	int gencnt;
		54
20	/* optionally saved, might be zero */	55	/* optionally saved, might be zero */
21	AV *defav;	56	AV *defav;
22	SV *defsv;	57	SV *defsv;
23	SV *errsv;	58	SV *errsv;
24		59
25	/* saved global state not related to stacks */	60	/* saved global state not related to stacks */
26	U8 dowarn;	61	U8 dowarn;
		62	I32 in_eval;
27		63
28	/* the stacks and related info (callchain etc..) */	64	/* the stacks and related info (callchain etc..) */
29	PERL_SI *curstackinfo;	65	PERL_SI *curstackinfo;
30	AV *curstack;	66	AV *curstack;
31	AV *mainstack;	67	AV *mainstack;
49	I32 savestack_max;	85	I32 savestack_max;
50	OP **retstack;	86	OP **retstack;
51	I32 retstack_ix;	87	I32 retstack_ix;
52	I32 retstack_max;	88	I32 retstack_max;
53	COP *curcop;	89	COP *curcop;
		90	JMPENV *top_env;
54		91
55	/* data associated with this coroutine (initial args) */	92	/* data associated with this coroutine (initial args) */
56	AV *args;	93	AV *args;
57	};	94	};
58		95
59	typedef struct coro *Coro__State;	96	typedef struct coro *Coro__State;
60	typedef struct coro *Coro__State_or_hashref;	97	typedef struct coro *Coro__State_or_hashref;
61		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;
62	static HV *padlist_cache;	103	static HV *padlist_cache;
63		104
64	/* mostly copied from op.c:cv_clone2 */	105	/* mostly copied from op.c:cv_clone2 */
65	STATIC AV *	106	STATIC AV *
66	clone_padlist (AV *protopadlist)	107	clone_padlist (AV *protopadlist)
…		…
154		195
155	return newpadlist;	196	return newpadlist;
156	}	197	}
157		198
158	#ifdef MAY_FLUSH	199	#ifdef MAY_FLUSH
159	STATIC AV *	200	STATIC void
160	free_padlist (AV *padlist)	201	free_padlist (AV *padlist)
161	{	202	{
162	/* may be during global destruction */	203	/* may be during global destruction */
163	if (SvREFCNT(padlist))	204	if (SvREFCNT(padlist))
164	{	205	{
…		…
229	#endif	270	#endif
230		271
231	#define SB do {	272	#define SB do {
232	#define SE } while (0)	273	#define SE } while (0)
233		274
234	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	275	#define LOAD(state) load_state(aTHX_ (state));
235	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	276	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
236		277
237	#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
238		279
239	static void	280	static void
240	load_state(pTHX_ Coro__State c)	281	load_state(pTHX_ Coro__State c)
241	{	282	{
242	PL_dowarn = c->dowarn;	283	PL_dowarn = c->dowarn;
		284	PL_in_eval = c->in_eval;
243		285
244	PL_curstackinfo = c->curstackinfo;	286	PL_curstackinfo = c->curstackinfo;
245	PL_curstack = c->curstack;	287	PL_curstack = c->curstack;
246	PL_mainstack = c->mainstack;	288	PL_mainstack = c->mainstack;
247	PL_stack_sp = c->stack_sp;	289	PL_stack_sp = c->stack_sp;
…		…
264	PL_savestack_max = c->savestack_max;	306	PL_savestack_max = c->savestack_max;
265	PL_retstack = c->retstack;	307	PL_retstack = c->retstack;
266	PL_retstack_ix = c->retstack_ix;	308	PL_retstack_ix = c->retstack_ix;
267	PL_retstack_max = c->retstack_max;	309	PL_retstack_max = c->retstack_max;
268	PL_curcop = c->curcop;	310	PL_curcop = c->curcop;
		311	PL_top_env = c->top_env;
269		312
270	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
271	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
272	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
273		316
…		…
300	save_state(pTHX_ Coro__State c, int flags)	343	save_state(pTHX_ Coro__State c, int flags)
301	{	344	{
302	{	345	{
303	dSP;	346	dSP;
304	I32 cxix = cxstack_ix;	347	I32 cxix = cxstack_ix;
		348	PERL_CONTEXT *ccstk = cxstack;
305	PERL_SI *top_si = PL_curstackinfo;	349	PERL_SI *top_si = PL_curstackinfo;
306	PERL_CONTEXT *ccstk = cxstack;
307		350
308	/*	351	/*
309	* 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
310	* (and reinitialize) all cv's in the whole callchain :(	353	* (and reinitialize) all cv's in the whole callchain :(
311	*/	354	*/
312		355
313	PUSHs (Nullsv);	356	PUSHs (Nullsv);
314	/* this loop was inspired by pp_caller */	357	/* this loop was inspired by pp_caller */
315	for (;;)	358	for (;;)
316	{	359	{
317	do	360	while (cxix >= 0)
318	{	361	{
319	PERL_CONTEXT *cx = &ccstk[cxix--];	362	PERL_CONTEXT *cx = &ccstk[cxix--];
320		363
321	if (CxTYPE(cx) == CXt_SUB)	364	if (CxTYPE(cx) == CXt_SUB)
322	{	365	{
…		…
348	/* I never used formats, so how should I know how these are implemented? */	391	/* I never used formats, so how should I know how these are implemented? */
349	/* my bold guess is as a simple, plain sub... */	392	/* my bold guess is as a simple, plain sub... */
350	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
351	}	394	}
352	}	395	}
353	while (cxix >= 0);
354		396
355	if (top_si->si_type == PERLSI_MAIN)	397	if (top_si->si_type == PERLSI_MAIN)
356	break;	398	break;
357		399
358	top_si = top_si->si_prev;	400	top_si = top_si->si_prev;
…		…
361	}	403	}
362		404
363	PUTBACK;	405	PUTBACK;
364	}	406	}
365		407
366	c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	408	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
367	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	409	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
368	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	410	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
369		411
370	c->dowarn = PL_dowarn;	412	c->dowarn = PL_dowarn;
		413	c->in_eval = PL_in_eval;
371		414
372	c->curstackinfo = PL_curstackinfo;	415	c->curstackinfo = PL_curstackinfo;
373	c->curstack = PL_curstack;	416	c->curstack = PL_curstack;
374	c->mainstack = PL_mainstack;	417	c->mainstack = PL_mainstack;
375	c->stack_sp = PL_stack_sp;	418	c->stack_sp = PL_stack_sp;
…		…
392	c->savestack_max = PL_savestack_max;	435	c->savestack_max = PL_savestack_max;
393	c->retstack = PL_retstack;	436	c->retstack = PL_retstack;
394	c->retstack_ix = PL_retstack_ix;	437	c->retstack_ix = PL_retstack_ix;
395	c->retstack_max = PL_retstack_max;	438	c->retstack_max = PL_retstack_max;
396	c->curcop = PL_curcop;	439	c->curcop = PL_curcop;
		440	c->top_env = PL_top_env;
		441	}
		442
		443	/*
		444	* allocate various perl stacks. This is an exact copy
		445	* of perl.c:init_stacks, except that it uses less memory
		446	* on the assumption that coroutines do not usually need
		447	* a lot of stackspace.
		448	*/
		449	STATIC void
		450	coro_init_stacks (pTHX)
		451	{
		452	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		453	PL_curstackinfo->si_type = PERLSI_MAIN;
		454	PL_curstack = PL_curstackinfo->si_stack;
		455	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		456
		457	PL_stack_base = AvARRAY(PL_curstack);
		458	PL_stack_sp = PL_stack_base;
		459	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		460
		461	New(50,PL_tmps_stack,96,SV*);
		462	PL_tmps_floor = -1;
		463	PL_tmps_ix = -1;
		464	PL_tmps_max = 96;
		465
		466	New(54,PL_markstack,16,I32);
		467	PL_markstack_ptr = PL_markstack;
		468	PL_markstack_max = PL_markstack + 16;
		469
		470	SET_MARK_OFFSET;
		471
		472	New(54,PL_scopestack,16,I32);
		473	PL_scopestack_ix = 0;
		474	PL_scopestack_max = 16;
		475
		476	New(54,PL_savestack,96,ANY);
		477	PL_savestack_ix = 0;
		478	PL_savestack_max = 96;
		479
		480	New(54,PL_retstack,8,OP*);
		481	PL_retstack_ix = 0;
		482	PL_retstack_max = 8;
397	}	483	}
398		484
399	/*	485	/*
400	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
401	* still there is a memleak of 128 bytes...	487	* still there is a memleak of 128 bytes...
402	*/	488	*/
403	STATIC void	489	STATIC void
404	destroy_stacks(pTHX)	490	destroy_stacks(pTHX)
405	{	491	{
		492	int destruct = PL_main_cv != Nullcv;
		493
		494	if (destruct)
		495	{
406	/* is this ugly, I ask? */	496	/* is this ugly, I ask? */
407	while (PL_scopestack_ix)	497	while (PL_scopestack_ix)
408	LEAVE;	498	LEAVE;
409		499
410	/* sure it is, but more important: is it correct?? :/ */	500	/* sure it is, but more important: is it correct?? :/ */
411	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
412	FREETMPS;	502	FREETMPS;
		503	}
413		504
414	while (PL_curstackinfo->si_next)	505	while (PL_curstackinfo->si_next)
415	PL_curstackinfo = PL_curstackinfo->si_next;	506	PL_curstackinfo = PL_curstackinfo->si_next;
416		507
417	while (PL_curstackinfo)	508	while (PL_curstackinfo)
…		…
422	dSP;	513	dSP;
423	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
424	PUTBACK; /* possibly superfluous */	515	PUTBACK; /* possibly superfluous */
425	}	516	}
426		517
		518	if (destruct)
		519	{
427	dounwind(-1);	520	dounwind(-1);
428
429	SvREFCNT_dec(PL_curstackinfo->si_stack);	521	SvREFCNT_dec(PL_curstackinfo->si_stack);
		522	}
		523
430	Safefree(PL_curstackinfo->si_cxstack);	524	Safefree(PL_curstackinfo->si_cxstack);
431	Safefree(PL_curstackinfo);	525	Safefree(PL_curstackinfo);
432	PL_curstackinfo = p;	526	PL_curstackinfo = p;
433	}	527	}
434		528
…		…
437	Safefree(PL_scopestack);	531	Safefree(PL_scopestack);
438	Safefree(PL_savestack);	532	Safefree(PL_savestack);
439	Safefree(PL_retstack);	533	Safefree(PL_retstack);
440	}	534	}
441		535
442	#define SUB_INIT "Coro::State::_newcoro"	536	static void
		537	allocate_stack (Coro__State ctx, int alloc)
		538	{
		539	coro_stack *stack;
		540
		541	New (0, stack, 1, coro_stack);
		542
		543	stack->refcnt = 1;
		544	stack->usecnt = 1;
		545	stack->gencnt = ctx->gencnt = 0;
		546	if (alloc)
		547	{
		548	#ifdef HAVE_MMAP
		549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
		550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
		551	if (stack->sptr == (void *)-1)
		552	#endif
		553	{
		554	/FIXME//D//* reasonable stack size! */
		555	stack->ssize = -4096 * sizeof (long);
		556	New (0, stack->sptr, 4096, long);
		557	}
		558	}
		559	else
		560	stack->sptr = 0;
		561
		562	ctx->stack = stack;
		563	}
		564
		565	static void
		566	deallocate_stack (Coro__State ctx)
		567	{
		568	coro_stack *stack = ctx->stack;
		569
		570	ctx->stack = 0;
		571
		572	if (stack)
		573	{
		574	if (!--stack->refcnt)
		575	{
		576	#ifdef HAVE_MMAP
		577	if (stack->ssize > 0 && stack->sptr)
		578	munmap (stack->sptr, stack->ssize);
		579	else
		580	#else
		581	Safefree (stack->sptr);
		582	#endif
		583	Safefree (stack);
		584	}
		585	else if (ctx->gencnt == stack->gencnt)
		586	--stack->usecnt;
		587	}
		588	}
		589
		590	static void
		591	setup_coro (void *arg)
		592	{
		593	/*
		594	* emulate part of the perl startup here.
		595	*/
		596	dSP;
		597	Coro__State ctx = (Coro__State)arg;
		598	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		599
		600	coro_init_stacks (aTHX);
		601	/PL_curcop = 0;/
		602	/PL_in_eval = PL_in_eval;/ /* inherit */
		603	SvREFCNT_dec (GvAV (PL_defgv));
		604	GvAV (PL_defgv) = ctx->args;
		605
		606	SPAGAIN;
		607
		608	if (ctx->stack)
		609	{
		610	ctx->cursp = 0;
		611
		612	PUSHMARK(SP);
		613	PUTBACK;
		614	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		615
		616	if (SvTRUE (ERRSV))
		617	croak (NULL);
		618	else
		619	croak ("FATAL: CCTXT coroutine returned!");
		620	}
		621	else
		622	{
		623	UNOP myop;
		624
		625	PL_op = (OP *)&myop;
		626
		627	Zero(&myop, 1, UNOP);
		628	myop.op_next = Nullop;
		629	myop.op_flags = OPf_WANT_VOID;
		630
		631	PUSHMARK(SP);
		632	XPUSHs (sub_init);
		633	/*
		634	* the next line is slightly wrong, as PL_op->op_next
		635	* is actually being executed so we skip the first op.
		636	* that doesn't matter, though, since it is only
		637	* pp_nextstate and we never return...
		638	* ah yes, and I don't care anyways ;)
		639	*/
		640	PUTBACK;
		641	PL_op = pp_entersub();
		642	SPAGAIN;
		643
		644	ENTER; /* necessary e.g. for dounwind */
		645	}
		646	}
		647
		648	static void
		649	continue_coro (void *arg)
		650	{
		651	/*
		652	* this is a _very_ stripped down perl interpreter ;)
		653	*/
		654	Coro__State ctx = (Coro__State)arg;
		655
		656	/FIXME//* must set up top_env here */
		657	ctx->cursp = 0;
		658	PL_op = PL_op->op_next;
		659	CALLRUNOPS(aTHX);
		660
		661	abort ();
		662	}
		663
		664	STATIC void
		665	transfer(pTHX_ struct coro prev, struct coro next, int flags)
		666	{
		667	dSTACKLEVEL;
		668	static struct coro *xnext;
		669
		670	if (prev != next)
		671	{
		672	xnext = next;
		673
		674	if (next->mainstack)
		675	{
		676	SAVE (prev, flags);
		677	LOAD (next);
		678
		679	/* mark this state as in-use */
		680	next->mainstack = 0;
		681	next->tmps_ix = -2;
		682
		683	/* stacklevel changed? if yes, grab the stack for us! */
		684	if (flags & TRANSFER_SAVE_CCTXT)
		685	{
		686	if (!prev->stack)
		687	allocate_stack (prev, 0);
		688	else if (prev->cursp != stacklevel
		689	&& prev->stack->usecnt > 1)
		690	{
		691	prev->gencnt = ++prev->stack->gencnt;
		692	prev->stack->usecnt = 1;
		693	}
		694
		695	/* has our stack been invalidated? */
		696	if (next->stack && next->stack->gencnt != next->gencnt)
		697	{
		698	deallocate_stack (next);
		699	allocate_stack (next, 1);
		700	coro_create (&(next->stack->cctx),
		701	continue_coro, (void *)next,
		702	next->stack->sptr, labs (next->stack->ssize));
		703	}
		704
		705	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		706	/* don't add any code here */
		707	}
		708
		709	}
		710	else if (next->tmps_ix == -2)
		711	croak ("tried to transfer to running coroutine");
		712	else
		713	{
		714	SAVE (prev, -1); /* first get rid of the old state */
		715
		716	if (flags & TRANSFER_SAVE_CCTXT)
		717	{
		718	if (!prev->stack)
		719	allocate_stack (prev, 0);
		720
		721	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		722	{
		723	setup_coro (next);
		724
		725	prev->stack->refcnt++;
		726	prev->stack->usecnt++;
		727	next->stack = prev->stack;
		728	next->gencnt = prev->gencnt;
		729	}
		730	else
		731	{
		732	allocate_stack (next, 1);
		733	coro_create (&(next->stack->cctx),
		734	setup_coro, (void *)next,
		735	next->stack->sptr, labs (next->stack->ssize));
		736	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		737	/* don't add any code here */
		738	}
		739	}
		740	else
		741	setup_coro (next);
		742	}
		743	}
		744
		745	/*
		746	* xnext is now either prev or next, depending on wether
		747	* we switched the c stack or not. that's why i use a global
		748	* variable, that should become thread-specific at one point.
		749	*/
		750	xnext->cursp = stacklevel;
		751	}
		752
		753	static struct coro *
		754	sv_to_coro (SV arg, const char funcname, const char *varname)
		755	{
		756	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
		757	{
		758	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
		759
		760	if (!he)
		761	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
		762
		763	arg = HeVAL(he);
		764	}
		765
		766	/* must also be changed inside Coro::Cont::yield */
		767	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
		768	return (struct coro ) SvIV((SV)SvRV(arg));
		769
		770	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
		771	/NORETURN/
		772	}
		773
		774	static void
		775	api_transfer(pTHX_ SV prev, SV next, int flags)
		776	{
		777	transfer(aTHX_
		778	sv_to_coro (prev, "Coro::transfer", "prev"),
		779	sv_to_coro (next, "Coro::transfer", "next"),
		780	flags);
		781	}
		782
		783	/ Coro ******************************************************************/
		784
		785	#define PRIO_MAX 3
		786	#define PRIO_HIGH 1
		787	#define PRIO_NORMAL 0
		788	#define PRIO_LOW -1
		789	#define PRIO_IDLE -3
		790	#define PRIO_MIN -4
		791
		792	/* for Coro.pm */
		793	static GV coro_current, coro_idle;
		794	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		795	static int coro_nready;
		796
		797	static void
		798	coro_enq (SV *sv)
		799	{
		800	if (SvROK (sv))
		801	{
		802	SV *hv = SvRV (sv);
		803	if (SvTYPE (hv) == SVt_PVHV)
		804	{
		805	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
		806	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		807
		808	prio = prio > PRIO_MAX ? PRIO_MAX
		809	: prio < PRIO_MIN ? PRIO_MIN
		810	: prio;
		811
		812	av_push (coro_ready [prio - PRIO_MIN], sv);
		813	coro_nready++;
		814
		815	return;
		816	}
		817	}
		818
		819	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		820	}
		821
		822	static SV *
		823	coro_deq (int min_prio)
		824	{
		825	int prio = PRIO_MAX - PRIO_MIN;
		826
		827	min_prio -= PRIO_MIN;
		828	if (min_prio < 0)
		829	min_prio = 0;
		830
		831	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		832	if (av_len (coro_ready[prio]) >= 0)
		833	{
		834	coro_nready--;
		835	return av_shift (coro_ready[prio]);
		836	}
		837
		838	return 0;
		839	}
		840
		841	static void
		842	api_ready (SV *coro)
		843	{
		844	coro_enq (SvREFCNT_inc (coro));
		845	}
		846
		847	static void
		848	api_schedule (int cede)
		849	{
		850	SV prev, next;
		851
		852	prev = GvSV (coro_current);
		853
		854	if (cede)
		855	coro_enq (SvREFCNT_inc (prev));
		856
		857	next = coro_deq (PRIO_MIN);
		858
		859	if (!next)
		860	next = SvREFCNT_inc (GvSV (coro_idle));
		861
		862	GvSV (coro_current) = SvREFCNT_inc (next);
		863	transfer (aTHX_
		864	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
		865	sv_to_coro (next, "Coro::schedule", "next coroutine"),
		866	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		867	SvREFCNT_dec (next);
		868	SvREFCNT_dec (prev);
		869	}
443		870
444	MODULE = Coro::State PACKAGE = Coro::State	871	MODULE = Coro::State PACKAGE = Coro::State
445		872
446	PROTOTYPES: ENABLE	873	PROTOTYPES: ENABLE
447		874
448	BOOT:	875	BOOT:
		876	{ /* {} necessary for stoopid perl-5.6.x */
		877	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		878	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
449	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	879	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
450		880
451	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	881	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
452	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	882	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
453	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	883	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		884	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
454		885
455	if (!padlist_cache)	886	if (!padlist_cache)
456	padlist_cache = newHV ();	887	padlist_cache = newHV ();
		888
		889	main_mainstack = PL_mainstack;
		890
		891	coroapi.ver = CORO_API_VERSION;
		892	coroapi.transfer = api_transfer;
		893	}
457		894
458	Coro::State	895	Coro::State
459	_newprocess(args)	896	_newprocess(args)
460	SV * args	897	SV * args
461	PROTOTYPE: $	898	PROTOTYPE: $
…		…
465	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	902	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
466	croak ("Coro::State::_newprocess expects an arrayref");	903	croak ("Coro::State::_newprocess expects an arrayref");
467		904
468	New (0, coro, 1, struct coro);	905	New (0, coro, 1, struct coro);
469		906
		907	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
470	coro->mainstack = 0; /* actual work is done inside transfer */	908	coro->mainstack = 0; /* actual work is done inside transfer */
471	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	909	coro->stack = 0;
472		910
473	RETVAL = coro;	911	RETVAL = coro;
474	OUTPUT:	912	OUTPUT:
475	RETVAL	913	RETVAL
476		914
477	void	915	void
478	transfer(prev, next, flags = SAVE_DEFAV)	916	transfer(prev, next, flags)
479	Coro::State_or_hashref prev	917	Coro::State_or_hashref prev
480	Coro::State_or_hashref next	918	Coro::State_or_hashref next
481	int flags	919	int flags
		920	PROTOTYPE: @
482	CODE:	921	CODE:
483
484	if (prev != next)
485	{
486	/*
487	* this could be done in newprocess which would lead to
488	* extremely elegant and fast (just SAVE/LOAD)
489	* code here, but lazy allocation of stacks has also
490	* some virtues and the overhead of the if() is nil.
491	*/
492	if (next->mainstack)
493	{
494	SAVE (prev, flags);
495	LOAD (next);
496	/* mark this state as in-use */
497	next->mainstack = 0;
498	next->tmps_ix = -2;
499	}
500	else if (next->tmps_ix == -2)
501	{
502	croak ("tried to transfer to running coroutine");
503	}
504	else
505	{
506	/*
507	* emulate part of the perl startup here.
508	*/
509	UNOP myop;
510
511	SAVE (prev, -1); /* first get rid of the old state */
512
513	init_stacks (); /* from perl.c */
514	SPAGAIN;
515
516	PL_op = (OP *)&myop;
517	/PL_curcop = 0;/
518	SvREFCNT_dec (GvAV (PL_defgv));
519	GvAV (PL_defgv) = next->args;
520
521	Zero(&myop, 1, UNOP);
522	myop.op_next = Nullop;
523	myop.op_flags = OPf_WANT_VOID;
524
525	PUSHMARK(SP);
526	XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
527	/*
528	* the next line is slightly wrong, as PL_op->op_next
529	* is actually being executed so we skip the first op.
530	* that doesn't matter, though, since it is only
531	* pp_nextstate and we never return...
532	* ah yes, and I don't care anyways ;)
533	*/
534	PUTBACK;	922	PUTBACK;
535	PL_op = pp_entersub(aTHX);	923	transfer (aTHX_ prev, next, flags);
536	SPAGAIN;	924	SPAGAIN;
537
538	ENTER; /* necessary e.g. for dounwind */
539	}
540	}
541		925
542	void	926	void
543	DESTROY(coro)	927	DESTROY(coro)
544	Coro::State coro	928	Coro::State coro
545	CODE:	929	CODE:
546		930
547	if (coro->mainstack)	931	if (coro->mainstack && coro->mainstack != main_mainstack)
548	{	932	{
549	struct coro temp;	933	struct coro temp;
550		934
		935	PUTBACK;
551	SAVE(aTHX_ (&temp), SAVE_ALL);	936	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
552	LOAD(aTHX_ coro);	937	LOAD(aTHX_ coro);
		938	SPAGAIN;
553		939
554	destroy_stacks ();	940	destroy_stacks (aTHX);
555		941
556	LOAD((&temp)); /* this will get rid of defsv etc.. */	942	LOAD((&temp)); /* this will get rid of defsv etc.. */
		943	SPAGAIN;
		944
		945	coro->mainstack = 0;
557	}	946	}
		947
		948	deallocate_stack (coro);
558		949
559	Safefree (coro);	950	Safefree (coro);
560		951
561	void	952	void
562	flush()	953	flush()
563	CODE:	954	CODE:
564	#ifdef MAY_FLUSH	955	#ifdef MAY_FLUSH
565	flush_padlist_cache ();	956	flush_padlist_cache ();
566	#endif	957	#endif
567		958
		959	void
		960	_exit(code)
		961	int code
		962	PROTOTYPE: $
		963	CODE:
		964	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		965	_exit (code);
		966	#else
		967	signal (SIGTERM, SIG_DFL);
		968	raise (SIGTERM);
		969	exit (code);
		970	#endif
568		971
		972	MODULE = Coro::State PACKAGE = Coro::Cont
		973
		974	# this is slightly dirty (should expose a c-level api)
		975
		976	void
		977	yield(...)
		978	PROTOTYPE: @
		979	CODE:
		980	static SV *returnstk;
		981	SV *sv;
		982	AV *defav = GvAV (PL_defgv);
		983	struct coro prev, next;
		984
		985	if (!returnstk)
		986	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
		987
		988	/* set up @_ -- ugly */
		989	av_clear (defav);
		990	av_fill (defav, items - 1);
		991	while (items--)
		992	av_store (defav, items, SvREFCNT_inc (ST(items)));
		993
		994	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
		995	sv = av_pop ((AV *)SvRV (returnstk));
		996	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
		997	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
		998	SvREFCNT_dec (sv);
		999
		1000	transfer(aTHX_ prev, next, 0);
		1001
		1002	MODULE = Coro::State PACKAGE = Coro
		1003
		1004	# this is slightly dirty (should expose a c-level api)
		1005
		1006	BOOT:
		1007	{
		1008	int i;
		1009	HV *stash = gv_stashpv ("Coro", TRUE);
		1010
		1011	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1012	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1013	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1014	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1015	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1016	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1017
		1018	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1019	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1020
		1021	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1022	coro_ready[i] = newAV ();
		1023
		1024	{
		1025	SV *sv = perl_get_sv("Coro::API", 1);
		1026
		1027	coroapi.schedule = api_schedule;
		1028	coroapi.ready = api_ready;
		1029	coroapi.nready = &coro_nready;
		1030	coroapi.current = coro_current;
		1031
		1032	GCoroAPI = &coroapi;
		1033	sv_setiv(sv, (IV)&coroapi);
		1034	SvREADONLY_on(sv);
		1035	}
		1036	}
		1037
		1038	void
		1039	ready(self)
		1040	SV * self
		1041	CODE:
		1042	api_ready (self);
		1043
		1044	int
		1045	nready(...)
		1046	PROTOTYPE:
		1047	CODE:
		1048	RETVAL = coro_nready;
		1049	OUTPUT:
		1050	RETVAL
		1051
		1052	void
		1053	schedule(...)
		1054	PROTOTYPE:
		1055	ALIAS:
		1056	cede = 1
		1057	CODE:
		1058	api_schedule (ix);
		1059

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Comparing Coro/Coro/State.xs (file contents): Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs. Revision 1.31 by root, Sun Aug 26 16:36:08 2001 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs.
Revision 1.31 by root, Sun Aug 26 16:36:08 2001 UTC