[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 1.23 by root, Tue Aug 14 04:33:58 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...
…		…
437	Safefree(PL_scopestack);	529	Safefree(PL_scopestack);
438	Safefree(PL_savestack);	530	Safefree(PL_savestack);
439	Safefree(PL_retstack);	531	Safefree(PL_retstack);
440	}	532	}
441		533
442	#define SUB_INIT "Coro::State::_newcoro"	534	static void
		535	allocate_stack (Coro__State ctx, int alloc)
		536	{
		537	coro_stack *stack;
		538
		539	New (0, stack, 1, coro_stack);
		540
		541	stack->refcnt = 1;
		542	stack->usecnt = 1;
		543	stack->gencnt = ctx->gencnt = 0;
		544	if (alloc)
		545	{
		546	#ifdef HAVE_MMAP
		547	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
		548	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
		549	if (stack->sptr == (void *)-1)
		550	#endif
		551	{
		552	/FIXME//D//* reasonable stack size! */
		553	stack->ssize = -4096 * sizeof (long);
		554	New (0, stack->sptr, 4096, long);
		555	}
		556	}
		557	else
		558	stack->sptr = 0;
		559
		560	ctx->stack = stack;
		561	}
		562
		563	static void
		564	deallocate_stack (Coro__State ctx)
		565	{
		566	coro_stack *stack = ctx->stack;
		567
		568	ctx->stack = 0;
		569
		570	if (stack)
		571	{
		572	if (!--stack->refcnt)
		573	{
		574	#ifdef HAVE_MMAP
		575	if (stack->ssize > 0 && stack->sptr)
		576	munmap (stack->sptr, stack->ssize);
		577	else
		578	#else
		579	Safefree (stack->sptr);
		580	#endif
		581	Safefree (stack);
		582	}
		583	else if (ctx->gencnt == stack->gencnt)
		584	--stack->usecnt;
		585	}
		586	}
		587
		588	static void
		589	setup_coro (void *arg)
		590	{
		591	/*
		592	* emulate part of the perl startup here.
		593	*/
		594	dSP;
		595	Coro__State ctx = (Coro__State)arg;
		596	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		597
		598	coro_init_stacks (aTHX);
		599	/PL_curcop = 0;/
		600	/PL_in_eval = PL_in_eval;/ /* inherit */
		601	SvREFCNT_dec (GvAV (PL_defgv));
		602	GvAV (PL_defgv) = ctx->args;
		603
		604	SPAGAIN;
		605
		606	if (ctx->stack)
		607	{
		608	ctx->cursp = 0;
		609
		610	PUSHMARK(SP);
		611	PUTBACK;
		612	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		613
		614	if (SvTRUE (ERRSV))
		615	croak (NULL);
		616	else
		617	croak ("FATAL: CCTXT coroutine returned!");
		618	}
		619	else
		620	{
		621	UNOP myop;
		622
		623	PL_op = (OP *)&myop;
		624
		625	Zero(&myop, 1, UNOP);
		626	myop.op_next = Nullop;
		627	myop.op_flags = OPf_WANT_VOID;
		628
		629	PUSHMARK(SP);
		630	XPUSHs (sub_init);
		631	/*
		632	* the next line is slightly wrong, as PL_op->op_next
		633	* is actually being executed so we skip the first op.
		634	* that doesn't matter, though, since it is only
		635	* pp_nextstate and we never return...
		636	* ah yes, and I don't care anyways ;)
		637	*/
		638	PUTBACK;
		639	PL_op = pp_entersub();
		640	SPAGAIN;
		641
		642	ENTER; /* necessary e.g. for dounwind */
		643	}
		644	}
		645
		646	static void
		647	continue_coro (void *arg)
		648	{
		649	/*
		650	* this is a _very_ stripped down perl interpreter ;)
		651	*/
		652	Coro__State ctx = (Coro__State)arg;
		653
		654	/FIXME//* must set up top_env here */
		655	ctx->cursp = 0;
		656	PL_op = PL_op->op_next;
		657	CALLRUNOPS(aTHX);
		658
		659	abort ();
		660	}
		661
		662	STATIC void
		663	transfer(pTHX_ struct coro prev, struct coro next, int flags)
		664	{
		665	dSP;
		666	dSTACKLEVEL;
		667
		668	if (prev != next)
		669	{
		670	if (next->mainstack)
		671	{
		672	SAVE (prev, flags);
		673	LOAD (next);
		674
		675	/* mark this state as in-use */
		676	next->mainstack = 0;
		677	next->tmps_ix = -2;
		678
		679	/* stacklevel changed? if yes, grab the stack for us! */
		680	if (flags & TRANSFER_SAVE_CCTXT)
		681	{
		682	if (!prev->stack)
		683	allocate_stack (prev, 0);
		684	else if (prev->cursp != stacklevel
		685	&& prev->stack->usecnt > 1)
		686	{
		687	prev->gencnt = ++prev->stack->gencnt;
		688	prev->stack->usecnt = 1;
		689	}
		690
		691	/* has our stack been invalidated? */
		692	if (next->stack && next->stack->gencnt != next->gencnt)
		693	{
		694	deallocate_stack (next);
		695	allocate_stack (next, 1);
		696	coro_create (&(next->stack->cctx),
		697	continue_coro, (void *)next,
		698	next->stack->sptr, labs (next->stack->ssize));
		699	}
		700
		701	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		702	}
		703
		704	}
		705	else if (next->tmps_ix == -2)
		706	croak ("tried to transfer to running coroutine");
		707	else
		708	{
		709	SAVE (prev, -1); /* first get rid of the old state */
		710
		711	if (flags & TRANSFER_SAVE_CCTXT)
		712	{
		713	if (!prev->stack)
		714	allocate_stack (prev, 0);
		715
		716	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		717	{
		718	setup_coro (next);
		719
		720	prev->stack->refcnt++;
		721	prev->stack->usecnt++;
		722	next->stack = prev->stack;
		723	next->gencnt = prev->gencnt;
		724	}
		725	else
		726	{
		727	allocate_stack (next, 1);
		728	coro_create (&(next->stack->cctx),
		729	setup_coro, (void *)next,
		730	next->stack->sptr, labs (next->stack->ssize));
		731	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		732	}
		733	}
		734	else
		735	setup_coro (next);
		736	}
		737	}
		738
		739	next->cursp = stacklevel;
		740	}
		741
		742	static struct coro *
		743	sv_to_coro (SV arg, const char funcname, const char *varname)
		744	{
		745	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
		746	{
		747	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
		748
		749	if (!he)
		750	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
		751
		752	arg = HeVAL(he);
		753	}
		754
		755	/* must also be changed inside Coro::Cont::yield */
		756	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
		757	return (struct coro ) SvIV((SV)SvRV(arg));
		758	else
		759	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
		760	}
		761
		762	static void
		763	api_transfer(pTHX_ SV prev, SV next, int flags)
		764	{
		765	transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
		766	sv_to_coro (next, "Coro::transfer", "next"),
		767	flags);
		768	}
		769
		770	/ Coro ******************************************************************/
		771
		772	#define PRIO_MAX 3
		773	#define PRIO_HIGH 1
		774	#define PRIO_NORMAL 0
		775	#define PRIO_LOW -1
		776	#define PRIO_IDLE -3
		777	#define PRIO_MIN -4
		778
		779	/* for Coro.pm */
		780	static GV coro_current, coro_idle;
		781	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		782
		783	static void
		784	coro_enq (SV *sv)
		785	{
		786	if (SvROK (sv))
		787	{
		788	SV *hv = SvRV (sv);
		789	if (SvTYPE (hv) == SVt_PVHV)
		790	{
		791	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
		792	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		793
		794	prio = prio > PRIO_MAX ? PRIO_MAX
		795	: prio < PRIO_MIN ? PRIO_MIN
		796	: prio;
		797
		798	av_push (coro_ready [prio - PRIO_MIN], sv);
		799
		800	return;
		801	}
		802	}
		803
		804	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		805	}
		806
		807	static SV *
		808	coro_deq (int min_prio)
		809	{
		810	int prio = PRIO_MAX - PRIO_MIN;
		811
		812	min_prio -= PRIO_MIN;
		813	if (min_prio < 0)
		814	min_prio = 0;
		815
		816	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		817	if (av_len (coro_ready[prio]) >= 0)
		818	return av_shift (coro_ready[prio]);
		819
		820	return 0;
		821	}
		822
		823	static void
		824	api_ready (SV *coro)
		825	{
		826	coro_enq (SvREFCNT_inc (coro));
		827	}
		828
		829	static void
		830	api_schedule (int cede)
		831	{
		832	SV prev, next;
		833
		834	prev = GvSV (coro_current);
		835
		836	if (cede)
		837	coro_enq (SvREFCNT_inc (prev));
		838
		839	next = coro_deq (PRIO_MIN);
		840
		841	if (!next)
		842	next = SvREFCNT_inc (GvSV (coro_idle));
		843
		844	GvSV (coro_current) = SvREFCNT_inc (next);
		845	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
		846	sv_to_coro (next, "Coro::schedule", "next coroutine"),
		847	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		848	SvREFCNT_dec (next);
		849	SvREFCNT_dec (prev);
		850	}
443		851
444	MODULE = Coro::State PACKAGE = Coro::State	852	MODULE = Coro::State PACKAGE = Coro::State
445		853
446	PROTOTYPES: ENABLE	854	PROTOTYPES: ENABLE
447		855
448	BOOT:	856	BOOT:
		857	{ /* {} necessary for stoopid perl-5.6.x */
		858	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		859	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
449	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	860	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
450		861
451	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	862	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
452	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	863	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
453	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	864	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		865	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
454		866
455	if (!padlist_cache)	867	if (!padlist_cache)
456	padlist_cache = newHV ();	868	padlist_cache = newHV ();
		869
		870	main_mainstack = PL_mainstack;
		871
		872	{
		873	SV *sv = perl_get_sv("Coro::API", 1);
		874
		875	coroapi.ver = CORO_API_VERSION - 1;
		876	coroapi.transfer = api_transfer;
		877	coroapi.schedule = api_schedule;
		878	coroapi.ready = api_ready;
		879
		880	GCoroAPI = &coroapi;
		881	sv_setiv(sv, (IV)&coroapi);
		882	SvREADONLY_on(sv);
		883	}
		884	}
457		885
458	Coro::State	886	Coro::State
459	_newprocess(args)	887	_newprocess(args)
460	SV * args	888	SV * args
461	PROTOTYPE: $	889	PROTOTYPE: $
…		…
465	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	893	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
466	croak ("Coro::State::_newprocess expects an arrayref");	894	croak ("Coro::State::_newprocess expects an arrayref");
467		895
468	New (0, coro, 1, struct coro);	896	New (0, coro, 1, struct coro);
469		897
		898	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
470	coro->mainstack = 0; /* actual work is done inside transfer */	899	coro->mainstack = 0; /* actual work is done inside transfer */
471	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	900	coro->stack = 0;
472		901
473	RETVAL = coro;	902	RETVAL = coro;
474	OUTPUT:	903	OUTPUT:
475	RETVAL	904	RETVAL
476		905
477	void	906	void
478	transfer(prev, next, flags = SAVE_DEFAV)	907	transfer(prev, next, flags)
479	Coro::State_or_hashref prev	908	Coro::State_or_hashref prev
480	Coro::State_or_hashref next	909	Coro::State_or_hashref next
481	int flags	910	int flags
		911	PROTOTYPE: @
482	CODE:	912	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;	913	PUTBACK;
535	PL_op = pp_entersub(aTHX);	914	transfer (aTHX_ prev, next, flags);
536	SPAGAIN;	915	SPAGAIN;
537
538	ENTER; /* necessary e.g. for dounwind */
539	}
540	}
541		916
542	void	917	void
543	DESTROY(coro)	918	DESTROY(coro)
544	Coro::State coro	919	Coro::State coro
545	CODE:	920	CODE:
546		921
547	if (coro->mainstack)	922	if (coro->mainstack && coro->mainstack != main_mainstack)
548	{	923	{
549	struct coro temp;	924	struct coro temp;
550		925
551	SAVE(aTHX_ (&temp), SAVE_ALL);	926	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
552	LOAD(aTHX_ coro);	927	LOAD(aTHX_ coro);
553		928
554	destroy_stacks ();	929	destroy_stacks (aTHX);
555		930
556	LOAD((&temp)); /* this will get rid of defsv etc.. */	931	LOAD((&temp)); /* this will get rid of defsv etc.. */
		932
		933	coro->mainstack = 0;
557	}	934	}
		935
		936	deallocate_stack (coro);
558		937
559	Safefree (coro);	938	Safefree (coro);
560		939
561	void	940	void
562	flush()	941	flush()
563	CODE:	942	CODE:
564	#ifdef MAY_FLUSH	943	#ifdef MAY_FLUSH
565	flush_padlist_cache ();	944	flush_padlist_cache ();
566	#endif	945	#endif
567		946
		947	void
		948	_exit(code)
		949	int code
		950	PROTOTYPE: $
		951	CODE:
		952	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		953	_exit (code);
		954	#else
		955	signal (SIGTERM, SIG_DFL);
		956	raise (SIGTERM);
		957	exit (code);
		958	#endif
568		959
		960	MODULE = Coro::State PACKAGE = Coro::Cont
		961
		962	# this is slightly dirty (should expose a c-level api)
		963
		964	void
		965	yield(...)
		966	PROTOTYPE: @
		967	CODE:
		968	static SV *returnstk;
		969	SV *sv;
		970	AV *defav = GvAV (PL_defgv);
		971	struct coro prev, next;
		972
		973	if (!returnstk)
		974	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
		975
		976	/* set up @_ -- ugly */
		977	av_clear (defav);
		978	av_fill (defav, items - 1);
		979	while (items--)
		980	av_store (defav, items, SvREFCNT_inc (ST(items)));
		981
		982	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
		983	sv = av_pop ((AV *)SvRV (returnstk));
		984	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
		985	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
		986	SvREFCNT_dec (sv);
		987
		988	transfer(aTHX_ prev, next, 0);
		989
		990	MODULE = Coro::State PACKAGE = Coro
		991
		992	# this is slightly dirty (should expose a c-level api)
		993
		994	BOOT:
		995	{
		996	int i;
		997	HV *stash = gv_stashpv ("Coro", TRUE);
		998
		999	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1000	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1001	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1002	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1003	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1004	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1005
		1006	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1007	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1008
		1009	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1010	coro_ready[i] = newAV ();
		1011	}
		1012
		1013	void
		1014	ready(self)
		1015	SV * self
		1016	CODE:
		1017	api_ready (self);
		1018
		1019	void
		1020	schedule(...)
		1021	ALIAS:
		1022	cede = 1
		1023	CODE:
		1024	api_schedule (ix);
		1025

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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 1.23 by root, Tue Aug 14 04:33:58 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 1.23 by root, Tue Aug 14 04:33:58 2001 UTC