[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 1.24 by root, Tue Aug 14 14:56:22 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 */
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 delcare 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)
…		…
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) SB load_state(aTHX_ (state)); SPAGAIN; SE
235	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	276	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
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	do
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	{
…		…
361	}	404	}
362		405
363	PUTBACK;	406	PUTBACK;
364	}	407	}
365		408
366	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;
367	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
368	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		412
		413	/* I have not the slightest idea of why av_reify is necessary */
		414	/* but if it's missing the defav contents magically get replaced sometimes */
		415	if (c->defav)
		416	av_reify (c->defav);
369		417
370	c->dowarn = PL_dowarn;	418	c->dowarn = PL_dowarn;
		419	c->in_eval = PL_in_eval;
371		420
372	c->curstackinfo = PL_curstackinfo;	421	c->curstackinfo = PL_curstackinfo;
373	c->curstack = PL_curstack;	422	c->curstack = PL_curstack;
374	c->mainstack = PL_mainstack;	423	c->mainstack = PL_mainstack;
375	c->stack_sp = PL_stack_sp;	424	c->stack_sp = PL_stack_sp;
…		…
392	c->savestack_max = PL_savestack_max;	441	c->savestack_max = PL_savestack_max;
393	c->retstack = PL_retstack;	442	c->retstack = PL_retstack;
394	c->retstack_ix = PL_retstack_ix;	443	c->retstack_ix = PL_retstack_ix;
395	c->retstack_max = PL_retstack_max;	444	c->retstack_max = PL_retstack_max;
396	c->curcop = PL_curcop;	445	c->curcop = PL_curcop;
		446	c->top_env = PL_top_env;
		447	}
		448
		449	/*
		450	* allocate various perl stacks. This is an exact copy
		451	* of perl.c:init_stacks, except that it uses less memory
		452	* on the assumption that coroutines do not usually need
		453	* a lot of stackspace.
		454	*/
		455	STATIC void
		456	coro_init_stacks (pTHX)
		457	{
		458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		459	PL_curstackinfo->si_type = PERLSI_MAIN;
		460	PL_curstack = PL_curstackinfo->si_stack;
		461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		462
		463	PL_stack_base = AvARRAY(PL_curstack);
		464	PL_stack_sp = PL_stack_base;
		465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		466
		467	New(50,PL_tmps_stack,96,SV*);
		468	PL_tmps_floor = -1;
		469	PL_tmps_ix = -1;
		470	PL_tmps_max = 96;
		471
		472	New(54,PL_markstack,16,I32);
		473	PL_markstack_ptr = PL_markstack;
		474	PL_markstack_max = PL_markstack + 16;
		475
		476	SET_MARK_OFFSET;
		477
		478	New(54,PL_scopestack,16,I32);
		479	PL_scopestack_ix = 0;
		480	PL_scopestack_max = 16;
		481
		482	New(54,PL_savestack,96,ANY);
		483	PL_savestack_ix = 0;
		484	PL_savestack_max = 96;
		485
		486	New(54,PL_retstack,8,OP*);
		487	PL_retstack_ix = 0;
		488	PL_retstack_max = 8;
397	}	489	}
398		490
399	/*	491	/*
400	* destroy the stacks, the callchain etc...	492	* destroy the stacks, the callchain etc...
401	* still there is a memleak of 128 bytes...	493	* still there is a memleak of 128 bytes...
…		…
422	dSP;	514	dSP;
423	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
424	PUTBACK; /* possibly superfluous */	516	PUTBACK; /* possibly superfluous */
425	}	517	}
426		518
		519	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
427	dounwind(-1);	520	dounwind(-1);
428		521
429	SvREFCNT_dec(PL_curstackinfo->si_stack);	522	SvREFCNT_dec(PL_curstackinfo->si_stack);
430	Safefree(PL_curstackinfo->si_cxstack);	523	Safefree(PL_curstackinfo->si_cxstack);
431	Safefree(PL_curstackinfo);	524	Safefree(PL_curstackinfo);
432	PL_curstackinfo = p;	525	PL_curstackinfo = p;
…		…
437	Safefree(PL_scopestack);	530	Safefree(PL_scopestack);
438	Safefree(PL_savestack);	531	Safefree(PL_savestack);
439	Safefree(PL_retstack);	532	Safefree(PL_retstack);
440	}	533	}
441		534
442	#define SUB_INIT "Coro::State::_newcoro"	535	static void
		536	allocate_stack (Coro__State ctx, int alloc)
		537	{
		538	coro_stack *stack;
		539
		540	New (0, stack, 1, coro_stack);
		541
		542	stack->refcnt = 1;
		543	stack->usecnt = 1;
		544	stack->gencnt = ctx->gencnt = 0;
		545	if (alloc)
		546	{
		547	#ifdef HAVE_MMAP
		548	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
		549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
		550	if (stack->sptr == (void *)-1)
		551	#endif
		552	{
		553	/FIXME//D//* reasonable stack size! */
		554	stack->ssize = -4096 * sizeof (long);
		555	New (0, stack->sptr, 4096, long);
		556	}
		557	}
		558	else
		559	stack->sptr = 0;
		560
		561	ctx->stack = stack;
		562	}
		563
		564	static void
		565	deallocate_stack (Coro__State ctx)
		566	{
		567	coro_stack *stack = ctx->stack;
		568
		569	ctx->stack = 0;
		570
		571	if (stack)
		572	{
		573	if (!--stack->refcnt)
		574	{
		575	#ifdef HAVE_MMAP
		576	if (stack->ssize > 0 && stack->sptr)
		577	munmap (stack->sptr, stack->ssize);
		578	else
		579	#else
		580	Safefree (stack->sptr);
		581	#endif
		582	Safefree (stack);
		583	}
		584	else if (ctx->gencnt == stack->gencnt)
		585	--stack->usecnt;
		586	}
		587	}
		588
		589	static void
		590	setup_coro (void *arg)
		591	{
		592	/*
		593	* emulate part of the perl startup here.
		594	*/
		595	dSP;
		596	Coro__State ctx = (Coro__State)arg;
		597	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		598
		599	coro_init_stacks (aTHX);
		600	/PL_curcop = 0;/
		601	/PL_in_eval = PL_in_eval;/ /* inherit */
		602	SvREFCNT_dec (GvAV (PL_defgv));
		603	GvAV (PL_defgv) = ctx->args;
		604
		605	SPAGAIN;
		606
		607	if (ctx->stack)
		608	{
		609	ctx->cursp = 0;
		610
		611	PUSHMARK(SP);
		612	PUTBACK;
		613	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		614
		615	if (SvTRUE (ERRSV))
		616	croak (NULL);
		617	else
		618	croak ("FATAL: CCTXT coroutine returned!");
		619	}
		620	else
		621	{
		622	UNOP myop;
		623
		624	PL_op = (OP *)&myop;
		625
		626	Zero(&myop, 1, UNOP);
		627	myop.op_next = Nullop;
		628	myop.op_flags = OPf_WANT_VOID;
		629
		630	PUSHMARK(SP);
		631	XPUSHs (sub_init);
		632	/*
		633	* the next line is slightly wrong, as PL_op->op_next
		634	* is actually being executed so we skip the first op.
		635	* that doesn't matter, though, since it is only
		636	* pp_nextstate and we never return...
		637	* ah yes, and I don't care anyways ;)
		638	*/
		639	PUTBACK;
		640	PL_op = pp_entersub();
		641	SPAGAIN;
		642
		643	ENTER; /* necessary e.g. for dounwind */
		644	}
		645	}
		646
		647	static void
		648	continue_coro (void *arg)
		649	{
		650	/*
		651	* this is a _very_ stripped down perl interpreter ;)
		652	*/
		653	Coro__State ctx = (Coro__State)arg;
		654
		655	/FIXME//* must set up top_env here */
		656	ctx->cursp = 0;
		657	PL_op = PL_op->op_next;
		658	CALLRUNOPS(aTHX);
		659
		660	abort ();
		661	}
		662
		663	STATIC void
		664	transfer(pTHX_ struct coro prev, struct coro next, int flags)
		665	{
		666	dSP;
		667	dSTACKLEVEL;
		668
		669	if (prev != next)
		670	{
		671	if (next->mainstack)
		672	{
		673	SAVE (prev, flags);
		674	LOAD (next);
		675
		676	/* mark this state as in-use */
		677	next->mainstack = 0;
		678	next->tmps_ix = -2;
		679
		680	/* stacklevel changed? if yes, grab the stack for us! */
		681	if (flags & TRANSFER_SAVE_CCTXT)
		682	{
		683	if (!prev->stack)
		684	allocate_stack (prev, 0);
		685	else if (prev->cursp != stacklevel
		686	&& prev->stack->usecnt > 1)
		687	{
		688	prev->gencnt = ++prev->stack->gencnt;
		689	prev->stack->usecnt = 1;
		690	}
		691
		692	/* has our stack been invalidated? */
		693	if (next->stack && next->stack->gencnt != next->gencnt)
		694	{
		695	deallocate_stack (next);
		696	allocate_stack (next, 1);
		697	coro_create (&(next->stack->cctx),
		698	continue_coro, (void *)next,
		699	next->stack->sptr, labs (next->stack->ssize));
		700	}
		701
		702	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		703	}
		704
		705	}
		706	else if (next->tmps_ix == -2)
		707	croak ("tried to transfer to running coroutine");
		708	else
		709	{
		710	SAVE (prev, -1); /* first get rid of the old state */
		711
		712	if (flags & TRANSFER_SAVE_CCTXT)
		713	{
		714	if (!prev->stack)
		715	allocate_stack (prev, 0);
		716
		717	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		718	{
		719	setup_coro (next);
		720
		721	prev->stack->refcnt++;
		722	prev->stack->usecnt++;
		723	next->stack = prev->stack;
		724	next->gencnt = prev->gencnt;
		725	}
		726	else
		727	{
		728	allocate_stack (next, 1);
		729	coro_create (&(next->stack->cctx),
		730	setup_coro, (void *)next,
		731	next->stack->sptr, labs (next->stack->ssize));
		732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		733	}
		734	}
		735	else
		736	setup_coro (next);
		737	}
		738	}
		739
		740	next->cursp = stacklevel;
		741	}
		742
		743	static struct coro *
		744	sv_to_coro (SV arg, const char funcname, const char *varname)
		745	{
		746	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
		747	{
		748	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
		749
		750	if (!he)
		751	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
		752
		753	arg = HeVAL(he);
		754	}
		755
		756	/* must also be changed inside Coro::Cont::yield */
		757	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
		758	return (struct coro ) SvIV((SV)SvRV(arg));
		759	else
		760	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
		761	}
		762
		763	static void
		764	api_transfer(pTHX_ SV prev, SV next, int flags)
		765	{
		766	transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
		767	sv_to_coro (next, "Coro::transfer", "next"),
		768	flags);
		769	}
		770
		771	/ Coro ******************************************************************/
		772
		773	#define PRIO_MAX 3
		774	#define PRIO_HIGH 1
		775	#define PRIO_NORMAL 0
		776	#define PRIO_LOW -1
		777	#define PRIO_IDLE -3
		778	#define PRIO_MIN -4
		779
		780	/* for Coro.pm */
		781	static GV coro_current, coro_idle;
		782	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		783
		784	static void
		785	coro_enq (SV *sv)
		786	{
		787	if (SvROK (sv))
		788	{
		789	SV *hv = SvRV (sv);
		790	if (SvTYPE (hv) == SVt_PVHV)
		791	{
		792	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
		793	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		794
		795	prio = prio > PRIO_MAX ? PRIO_MAX
		796	: prio < PRIO_MIN ? PRIO_MIN
		797	: prio;
		798
		799	av_push (coro_ready [prio - PRIO_MIN], sv);
		800
		801	return;
		802	}
		803	}
		804
		805	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		806	}
		807
		808	static SV *
		809	coro_deq (int min_prio)
		810	{
		811	int prio = PRIO_MAX - PRIO_MIN;
		812
		813	min_prio -= PRIO_MIN;
		814	if (min_prio < 0)
		815	min_prio = 0;
		816
		817	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		818	if (av_len (coro_ready[prio]) >= 0)
		819	return av_shift (coro_ready[prio]);
		820
		821	return 0;
		822	}
		823
		824	static void
		825	api_ready (SV *coro)
		826	{
		827	coro_enq (SvREFCNT_inc (coro));
		828	}
		829
		830	static void
		831	api_schedule (int cede)
		832	{
		833	SV prev, next;
		834
		835	prev = GvSV (coro_current);
		836
		837	if (cede)
		838	coro_enq (SvREFCNT_inc (prev));
		839
		840	next = coro_deq (PRIO_MIN);
		841
		842	if (!next)
		843	next = SvREFCNT_inc (GvSV (coro_idle));
		844
		845	GvSV (coro_current) = SvREFCNT_inc (next);
		846	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
		847	sv_to_coro (next, "Coro::schedule", "next coroutine"),
		848	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		849	SvREFCNT_dec (next);
		850	SvREFCNT_dec (prev);
		851	}
443		852
444	MODULE = Coro::State PACKAGE = Coro::State	853	MODULE = Coro::State PACKAGE = Coro::State
445		854
446	PROTOTYPES: ENABLE	855	PROTOTYPES: ENABLE
447		856
448	BOOT:	857	BOOT:
		858	{ /* {} necessary for stoopid perl-5.6.x */
		859	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		860	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
449	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	861	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
450		862
451	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	863	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
452	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	864	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
453	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	865	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		866	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
454		867
455	if (!padlist_cache)	868	if (!padlist_cache)
456	padlist_cache = newHV ();	869	padlist_cache = newHV ();
		870
		871	main_mainstack = PL_mainstack;
		872
		873	{
		874	SV *sv = perl_get_sv("Coro::API", 1);
		875
		876	coroapi.ver = CORO_API_VERSION - 1;
		877	coroapi.transfer = api_transfer;
		878	coroapi.schedule = api_schedule;
		879	coroapi.ready = api_ready;
		880
		881	GCoroAPI = &coroapi;
		882	sv_setiv(sv, (IV)&coroapi);
		883	SvREADONLY_on(sv);
		884	}
		885	}
457		886
458	Coro::State	887	Coro::State
459	_newprocess(args)	888	_newprocess(args)
460	SV * args	889	SV * args
461	PROTOTYPE: $	890	PROTOTYPE: $
…		…
465	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	894	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
466	croak ("Coro::State::_newprocess expects an arrayref");	895	croak ("Coro::State::_newprocess expects an arrayref");
467		896
468	New (0, coro, 1, struct coro);	897	New (0, coro, 1, struct coro);
469		898
		899	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
470	coro->mainstack = 0; /* actual work is done inside transfer */	900	coro->mainstack = 0; /* actual work is done inside transfer */
471	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	901	coro->stack = 0;
472		902
473	RETVAL = coro;	903	RETVAL = coro;
474	OUTPUT:	904	OUTPUT:
475	RETVAL	905	RETVAL
476		906
477	void	907	void
478	transfer(prev, next, flags = SAVE_DEFAV)	908	transfer(prev, next, flags)
479	Coro::State_or_hashref prev	909	Coro::State_or_hashref prev
480	Coro::State_or_hashref next	910	Coro::State_or_hashref next
481	int flags	911	int flags
		912	PROTOTYPE: @
482	CODE:	913	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;	914	PUTBACK;
535	PL_op = pp_entersub(aTHX);	915	transfer (aTHX_ prev, next, flags);
536	SPAGAIN;	916	SPAGAIN;
537
538	ENTER; /* necessary e.g. for dounwind */
539	}
540	}
541		917
542	void	918	void
543	DESTROY(coro)	919	DESTROY(coro)
544	Coro::State coro	920	Coro::State coro
545	CODE:	921	CODE:
546		922
547	if (coro->mainstack)	923	if (coro->mainstack && coro->mainstack != main_mainstack)
548	{	924	{
549	struct coro temp;	925	struct coro temp;
550		926
551	SAVE(aTHX_ (&temp), SAVE_ALL);	927	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
552	LOAD(aTHX_ coro);	928	LOAD(aTHX_ coro);
553		929
554	destroy_stacks ();	930	destroy_stacks (aTHX);
555		931
556	LOAD((&temp)); /* this will get rid of defsv etc.. */	932	LOAD((&temp)); /* this will get rid of defsv etc.. */
		933
		934	coro->mainstack = 0;
557	}	935	}
		936
		937	deallocate_stack (coro);
558		938
559	Safefree (coro);	939	Safefree (coro);
560		940
561	void	941	void
562	flush()	942	flush()
563	CODE:	943	CODE:
564	#ifdef MAY_FLUSH	944	#ifdef MAY_FLUSH
565	flush_padlist_cache ();	945	flush_padlist_cache ();
566	#endif	946	#endif
567		947
		948	void
		949	_exit(code)
		950	int code
		951	PROTOTYPE: $
		952	CODE:
		953	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		954	_exit (code);
		955	#else
		956	signal (SIGTERM, SIG_DFL);
		957	raise (SIGTERM);
		958	exit (code);
		959	#endif
568		960
		961	MODULE = Coro::State PACKAGE = Coro::Cont
		962
		963	# this is slightly dirty (should expose a c-level api)
		964
		965	void
		966	yield(...)
		967	PROTOTYPE: @
		968	CODE:
		969	static SV *returnstk;
		970	SV *sv;
		971	AV *defav = GvAV (PL_defgv);
		972	struct coro prev, next;
		973
		974	if (!returnstk)
		975	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
		976
		977	/* set up @_ -- ugly */
		978	av_clear (defav);
		979	av_fill (defav, items - 1);
		980	while (items--)
		981	av_store (defav, items, SvREFCNT_inc (ST(items)));
		982
		983	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
		984	sv = av_pop ((AV *)SvRV (returnstk));
		985	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
		986	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
		987	SvREFCNT_dec (sv);
		988
		989	transfer(aTHX_ prev, next, 0);
		990
		991	MODULE = Coro::State PACKAGE = Coro
		992
		993	# this is slightly dirty (should expose a c-level api)
		994
		995	BOOT:
		996	{
		997	int i;
		998	HV *stash = gv_stashpv ("Coro", TRUE);
		999
		1000	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1001	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1002	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1003	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1004	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1005	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1006
		1007	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1008	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1009
		1010	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1011	coro_ready[i] = newAV ();
		1012	}
		1013
		1014	void
		1015	ready(self)
		1016	SV * self
		1017	CODE:
		1018	api_ready (self);
		1019
		1020	void
		1021	schedule(...)
		1022	ALIAS:
		1023	cede = 1
		1024	CODE:
		1025	api_schedule (ix);
		1026

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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 1.24 by root, Tue Aug 14 14:56:22 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 1.24 by root, Tue Aug 14 14:56:22 2001 UTC