[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 1.42 by root, Mon Dec 31 20:41:45 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 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 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;
18		50
19	struct coro {	51	struct coro {
		52	/* the optional C context */
		53	coro_stack *stack;
		54	void *cursp;
		55	int gencnt;
		56
20	/* optionally saved, might be zero */	57	/* optionally saved, might be zero */
21	AV *defav;	58	AV *defav;
22	SV *defsv;	59	SV *defsv;
23	SV *errsv;	60	SV *errsv;
24		61
25	/* saved global state not related to stacks */	62	/* saved global state not related to stacks */
26	U8 dowarn;	63	U8 dowarn;
		64	I32 in_eval;
27		65
28	/* the stacks and related info (callchain etc..) */	66	/* the stacks and related info (callchain etc..) */
29	PERL_SI *curstackinfo;	67	PERL_SI *curstackinfo;
30	AV *curstack;	68	AV *curstack;
31	AV *mainstack;	69	AV *mainstack;
49	I32 savestack_max;	87	I32 savestack_max;
50	OP **retstack;	88	OP **retstack;
51	I32 retstack_ix;	89	I32 retstack_ix;
52	I32 retstack_max;	90	I32 retstack_max;
53	COP *curcop;	91	COP *curcop;
		92	JMPENV *top_env;
54		93
55	/* data associated with this coroutine (initial args) */	94	/* data associated with this coroutine (initial args) */
56	AV *args;	95	AV *args;
57	};	96	};
58		97
59	typedef struct coro *Coro__State;	98	typedef struct coro *Coro__State;
60	typedef struct coro *Coro__State_or_hashref;	99	typedef struct coro *Coro__State_or_hashref;
61		100
		101	static AV main_mainstack; / used to differentiate between $main and others */
		102	static HV *coro_state_stash;
		103	static SV *ucoro_state_sv;
		104	static U32 ucoro_state_hash;
62	static HV *padlist_cache;	105	static HV *padlist_cache;
		106	static SV coro_mortal; / will be freed after next transfer */
63		107
64	/* mostly copied from op.c:cv_clone2 */	108	/* mostly copied from op.c:cv_clone2 */
65	STATIC AV *	109	STATIC AV *
66	clone_padlist (AV *protopadlist)	110	clone_padlist (AV *protopadlist)
67	{	111	{
…		…
154		198
155	return newpadlist;	199	return newpadlist;
156	}	200	}
157		201
158	#ifdef MAY_FLUSH	202	#ifdef MAY_FLUSH
159	STATIC AV *	203	STATIC void
160	free_padlist (AV *padlist)	204	free_padlist (AV *padlist)
161	{	205	{
162	/* may be during global destruction */	206	/* may be during global destruction */
163	if (SvREFCNT(padlist))	207	if (SvREFCNT(padlist))
164	{	208	{
…		…
229	#endif	273	#endif
230		274
231	#define SB do {	275	#define SB do {
232	#define SE } while (0)	276	#define SE } while (0)
233		277
234	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	278	#define LOAD(state) load_state(aTHX_ (state));
235	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	279	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
236		280
237	#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
238		282
239	static void	283	static void
240	load_state(pTHX_ Coro__State c)	284	load_state(pTHX_ Coro__State c)
241	{	285	{
242	PL_dowarn = c->dowarn;	286	PL_dowarn = c->dowarn;
		287	PL_in_eval = c->in_eval;
243		288
244	PL_curstackinfo = c->curstackinfo;	289	PL_curstackinfo = c->curstackinfo;
245	PL_curstack = c->curstack;	290	PL_curstack = c->curstack;
246	PL_mainstack = c->mainstack;	291	PL_mainstack = c->mainstack;
247	PL_stack_sp = c->stack_sp;	292	PL_stack_sp = c->stack_sp;
…		…
264	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
265	PL_retstack = c->retstack;	310	PL_retstack = c->retstack;
266	PL_retstack_ix = c->retstack_ix;	311	PL_retstack_ix = c->retstack_ix;
267	PL_retstack_max = c->retstack_max;	312	PL_retstack_max = c->retstack_max;
268	PL_curcop = c->curcop;	313	PL_curcop = c->curcop;
		314	PL_top_env = c->top_env;
269		315
270	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	316	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
271	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	317	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
272	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	318	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
273		319
…		…
300	save_state(pTHX_ Coro__State c, int flags)	346	save_state(pTHX_ Coro__State c, int flags)
301	{	347	{
302	{	348	{
303	dSP;	349	dSP;
304	I32 cxix = cxstack_ix;	350	I32 cxix = cxstack_ix;
		351	PERL_CONTEXT *ccstk = cxstack;
305	PERL_SI *top_si = PL_curstackinfo;	352	PERL_SI *top_si = PL_curstackinfo;
306	PERL_CONTEXT *ccstk = cxstack;
307		353
308	/*	354	/*
309	* 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
310	* (and reinitialize) all cv's in the whole callchain :(	356	* (and reinitialize) all cv's in the whole callchain :(
311	*/	357	*/
312		358
313	PUSHs (Nullsv);	359	PUSHs (Nullsv);
314	/* this loop was inspired by pp_caller */	360	/* this loop was inspired by pp_caller */
315	for (;;)	361	for (;;)
316	{	362	{
317	do	363	while (cxix >= 0)
318	{	364	{
319	PERL_CONTEXT *cx = &ccstk[cxix--];	365	PERL_CONTEXT *cx = &ccstk[cxix--];
320		366
321	if (CxTYPE(cx) == CXt_SUB)	367	if (CxTYPE(cx) == CXt_SUB)
322	{	368	{
…		…
348	/* 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? */
349	/* my bold guess is as a simple, plain sub... */	395	/* my bold guess is as a simple, plain sub... */
350	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");
351	}	397	}
352	}	398	}
353	while (cxix >= 0);
354		399
355	if (top_si->si_type == PERLSI_MAIN)	400	if (top_si->si_type == PERLSI_MAIN)
356	break;	401	break;
357		402
358	top_si = top_si->si_prev;	403	top_si = top_si->si_prev;
…		…
361	}	406	}
362		407
363	PUTBACK;	408	PUTBACK;
364	}	409	}
365		410
366	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;
367	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	412	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
368	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	413	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
369		414
370	c->dowarn = PL_dowarn;	415	c->dowarn = PL_dowarn;
		416	c->in_eval = PL_in_eval;
371		417
372	c->curstackinfo = PL_curstackinfo;	418	c->curstackinfo = PL_curstackinfo;
373	c->curstack = PL_curstack;	419	c->curstack = PL_curstack;
374	c->mainstack = PL_mainstack;	420	c->mainstack = PL_mainstack;
375	c->stack_sp = PL_stack_sp;	421	c->stack_sp = PL_stack_sp;
…		…
392	c->savestack_max = PL_savestack_max;	438	c->savestack_max = PL_savestack_max;
393	c->retstack = PL_retstack;	439	c->retstack = PL_retstack;
394	c->retstack_ix = PL_retstack_ix;	440	c->retstack_ix = PL_retstack_ix;
395	c->retstack_max = PL_retstack_max;	441	c->retstack_max = PL_retstack_max;
396	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;
397	}	486	}
398		487
399	/*	488	/*
400	* destroy the stacks, the callchain etc...	489	* destroy the stacks, the callchain etc...
401	* still there is a memleak of 128 bytes...	490	* still there is a memleak of 128 bytes...
402	*/	491	*/
403	STATIC void	492	STATIC void
404	destroy_stacks(pTHX)	493	destroy_stacks(pTHX)
405	{	494	{
		495	if (!IN_DESTRUCT)
		496	{
406	/* is this ugly, I ask? */	497	/* is this ugly, I ask? */
407	while (PL_scopestack_ix)	498	while (PL_scopestack_ix)
408	LEAVE;	499	LEAVE;
409		500
410	/* sure it is, but more important: is it correct?? :/ */	501	/* sure it is, but more important: is it correct?? :/ */
411	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 */
412	FREETMPS;	503	FREETMPS;
		504	}
413		505
414	while (PL_curstackinfo->si_next)	506	while (PL_curstackinfo->si_next)
415	PL_curstackinfo = PL_curstackinfo->si_next;	507	PL_curstackinfo = PL_curstackinfo->si_next;
416		508
417	while (PL_curstackinfo)	509	while (PL_curstackinfo)
…		…
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 (!IN_DESTRUCT)
		520	{
427	dounwind(-1);	521	dounwind(-1);
428
429	SvREFCNT_dec(PL_curstackinfo->si_stack);	522	SvREFCNT_dec(PL_curstackinfo->si_stack);
		523	}
		524
430	Safefree(PL_curstackinfo->si_cxstack);	525	Safefree(PL_curstackinfo->si_cxstack);
431	Safefree(PL_curstackinfo);	526	Safefree(PL_curstackinfo);
432	PL_curstackinfo = p;	527	PL_curstackinfo = p;
433	}	528	}
434		529
…		…
437	Safefree(PL_scopestack);	532	Safefree(PL_scopestack);
438	Safefree(PL_savestack);	533	Safefree(PL_savestack);
439	Safefree(PL_retstack);	534	Safefree(PL_retstack);
440	}	535	}
441		536
442	#define SUB_INIT "Coro::State::_newcoro"	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 = PL_ppaddr[OP_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
		671	STATIC void
		672	transfer(pTHX_ struct coro prev, struct coro next, int flags)
		673	{
		674	dSTACKLEVEL;
		675	static struct coro *xnext;
		676
		677	if (prev != next)
		678	{
		679	xnext = next;
		680
		681	if (next->mainstack)
		682	{
		683	SAVE (prev, flags);
		684	LOAD (next);
		685
		686	/* mark this state as in-use */
		687	next->mainstack = 0;
		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
		716	}
		717	else if (next->tmps_ix == -2)
		718	croak ("tried to transfer to running coroutine");
		719	else
		720	{
		721	SAVE (prev, -1); /* first get rid of the old state */
		722
		723	if (flags & TRANSFER_SAVE_CCTXT)
		724	{
		725	if (!prev->stack)
		726	allocate_stack (prev, 0);
		727
		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	if (coro_mortal)
		760	{
		761	SvREFCNT_dec (coro_mortal);
		762	coro_mortal = 0;
		763	}
		764	}
		765
		766	#define SV_CORO(sv,func) \
		767	do { \
		768	if (SvROK (sv)) \
		769	sv = SvRV (sv); \
		770	\
		771	if (SvTYPE(sv) == SVt_PVHV) \
		772	{ \
		773	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		774	\
		775	if (!he) \
		776	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		777	\
		778	(sv) = SvRV (HeVAL(he)); \
		779	} \
		780	\
		781	/* must also be changed inside Coro::Cont::yield */ \
		782	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		783	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		784	\
		785	} while(0)
		786
		787	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		788
		789	static void
		790	api_transfer(pTHX_ SV prev, SV next, int flags)
		791	{
		792	SV_CORO (prev, "Coro::transfer");
		793	SV_CORO (next, "Coro::transfer");
		794
		795	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		796	}
		797
		798	/ Coro ******************************************************************/
		799
		800	#define PRIO_MAX 3
		801	#define PRIO_HIGH 1
		802	#define PRIO_NORMAL 0
		803	#define PRIO_LOW -1
		804	#define PRIO_IDLE -3
		805	#define PRIO_MIN -4
		806
		807	/* for Coro.pm */
		808	static GV coro_current, coro_idle;
		809	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		810	static int coro_nready;
		811
		812	static void
		813	coro_enq (SV *sv)
		814	{
		815	if (SvTYPE (sv) == SVt_PVHV)
		816	{
		817	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		818	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		819
		820	prio = prio > PRIO_MAX ? PRIO_MAX
		821	: prio < PRIO_MIN ? PRIO_MIN
		822	: prio;
		823
		824	av_push (coro_ready [prio - PRIO_MIN], sv);
		825	coro_nready++;
		826
		827	return;
		828	}
		829
		830	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		831	}
		832
		833	static SV *
		834	coro_deq (int min_prio)
		835	{
		836	int prio = PRIO_MAX - PRIO_MIN;
		837
		838	min_prio -= PRIO_MIN;
		839	if (min_prio < 0)
		840	min_prio = 0;
		841
		842	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		843	if (av_len (coro_ready[prio]) >= 0)
		844	{
		845	coro_nready--;
		846	return av_shift (coro_ready[prio]);
		847	}
		848
		849	return 0;
		850	}
		851
		852	static void
		853	api_ready (SV *coro)
		854	{
		855	if (SvROK (coro))
		856	coro = SvRV (coro);
		857
		858	coro_enq (SvREFCNT_inc (coro));
		859	}
		860
		861	static void
		862	api_schedule (void)
		863	{
		864	SV prev, next;
		865
		866	prev = SvRV (GvSV (coro_current));
		867	next = coro_deq (PRIO_MIN);
		868
		869	if (!next)
		870	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		871
		872	/* free this only after the transfer */
		873	coro_mortal = prev;
		874	SV_CORO (prev, "Coro::schedule");
		875
		876	SvRV (GvSV (coro_current)) = next;
		877
		878	SV_CORO (next, "Coro::schedule");
		879
		880	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		881	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		882	}
		883
		884	static void
		885	api_cede (void)
		886	{
		887	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		888
		889	api_schedule ();
		890	}
443		891
444	MODULE = Coro::State PACKAGE = Coro::State	892	MODULE = Coro::State PACKAGE = Coro::State
445		893
446	PROTOTYPES: ENABLE	894	PROTOTYPES: ENABLE
447		895
448	BOOT:	896	BOOT:
		897	{ /* {} necessary for stoopid perl-5.6.x */
		898	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		899	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
449	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	900	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
450		901
451	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	902	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
452	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	903	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
453	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	904	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		905	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
454		906
455	if (!padlist_cache)	907	if (!padlist_cache)
456	padlist_cache = newHV ();	908	padlist_cache = newHV ();
		909
		910	main_mainstack = PL_mainstack;
		911
		912	coroapi.ver = CORO_API_VERSION;
		913	coroapi.transfer = api_transfer;
		914	}
457		915
458	Coro::State	916	Coro::State
459	_newprocess(args)	917	_newprocess(args)
460	SV * args	918	SV * args
461	PROTOTYPE: $	919	PROTOTYPE: $
…		…
465	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	923	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
466	croak ("Coro::State::_newprocess expects an arrayref");	924	croak ("Coro::State::_newprocess expects an arrayref");
467		925
468	New (0, coro, 1, struct coro);	926	New (0, coro, 1, struct coro);
469		927
		928	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
470	coro->mainstack = 0; /* actual work is done inside transfer */	929	coro->mainstack = 0; /* actual work is done inside transfer */
471	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	930	coro->stack = 0;
472		931
473	RETVAL = coro;	932	RETVAL = coro;
474	OUTPUT:	933	OUTPUT:
475	RETVAL	934	RETVAL
476		935
477	void	936	void
478	transfer(prev, next, flags = SAVE_DEFAV)	937	transfer(prev, next, flags)
479	Coro::State_or_hashref prev	938	SV *prev
480	Coro::State_or_hashref next	939	SV *next
481	int flags	940	int flags
		941	PROTOTYPE: @
482	CODE:	942	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;	943	PUTBACK;
535	PL_op = pp_entersub(aTHX);	944	SV_CORO (next, "Coro::transfer");
		945	SV_CORO (prev, "Coro::transfer");
		946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
536	SPAGAIN;	947	SPAGAIN;
537
538	ENTER; /* necessary e.g. for dounwind */
539	}
540	}
541		948
542	void	949	void
543	DESTROY(coro)	950	DESTROY(coro)
544	Coro::State coro	951	Coro::State coro
545	CODE:	952	CODE:
546		953
547	if (coro->mainstack)	954	if (coro->mainstack && coro->mainstack != main_mainstack)
548	{	955	{
549	struct coro temp;	956	struct coro temp;
550		957
		958	PUTBACK;
551	SAVE(aTHX_ (&temp), SAVE_ALL);	959	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
552	LOAD(aTHX_ coro);	960	LOAD(aTHX_ coro);
		961	SPAGAIN;
553		962
554	destroy_stacks ();	963	destroy_stacks (aTHX);
555		964
556	LOAD((&temp)); /* this will get rid of defsv etc.. */	965	LOAD((&temp)); /* this will get rid of defsv etc.. */
		966	SPAGAIN;
		967
		968	coro->mainstack = 0;
557	}	969	}
		970
		971	deallocate_stack (coro);
558		972
559	Safefree (coro);	973	Safefree (coro);
560		974
561	void	975	void
562	flush()	976	flush()
563	CODE:	977	CODE:
564	#ifdef MAY_FLUSH	978	#ifdef MAY_FLUSH
565	flush_padlist_cache ();	979	flush_padlist_cache ();
566	#endif	980	#endif
567		981
		982	void
		983	_exit(code)
		984	int code
		985	PROTOTYPE: $
		986	CODE:
		987	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		988	_exit (code);
		989	#else
		990	signal (SIGTERM, SIG_DFL);
		991	raise (SIGTERM);
		992	exit (code);
		993	#endif
568		994
		995	MODULE = Coro::State PACKAGE = Coro::Cont
		996
		997	# this is slightly dirty (should expose a c-level api)
		998
		999	void
		1000	yield(...)
		1001	PROTOTYPE: @
		1002	CODE:
		1003	static SV *returnstk;
		1004	SV *sv;
		1005	AV *defav = GvAV (PL_defgv);
		1006	struct coro prev, next;
		1007
		1008	if (!returnstk)
		1009	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
		1010
		1011	/* set up @_ -- ugly */
		1012	av_clear (defav);
		1013	av_fill (defav, items - 1);
		1014	while (items--)
		1015	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1016
		1017	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
		1018	sv = av_pop ((AV *)SvRV (returnstk));
		1019	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
		1020	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
		1021	SvREFCNT_dec (sv);
		1022
		1023	transfer(aTHX_ prev, next, 0);
		1024
		1025	MODULE = Coro::State PACKAGE = Coro
		1026
		1027	# this is slightly dirty (should expose a c-level api)
		1028
		1029	BOOT:
		1030	{
		1031	int i;
		1032	HV *stash = gv_stashpv ("Coro", TRUE);
		1033
		1034	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1035	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1036	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1037	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1038	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1039	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1040
		1041	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1042	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1043
		1044	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1045	coro_ready[i] = newAV ();
		1046
		1047	{
		1048	SV *sv = perl_get_sv("Coro::API", 1);
		1049
		1050	coroapi.schedule = api_schedule;
		1051	coroapi.cede = api_cede;
		1052	coroapi.ready = api_ready;
		1053	coroapi.nready = &coro_nready;
		1054	coroapi.current = coro_current;
		1055
		1056	GCoroAPI = &coroapi;
		1057	sv_setiv(sv, (IV)&coroapi);
		1058	SvREADONLY_on(sv);
		1059	}
		1060	}
		1061
		1062	void
		1063	ready(self)
		1064	SV * self
		1065	PROTOTYPE: $
		1066	CODE:
		1067	api_ready (self);
		1068
		1069	int
		1070	nready(...)
		1071	PROTOTYPE:
		1072	CODE:
		1073	RETVAL = coro_nready;
		1074	OUTPUT:
		1075	RETVAL
		1076
		1077	void
		1078	schedule(...)
		1079	PROTOTYPE:
		1080	CODE:
		1081	api_schedule ();
		1082
		1083	void
		1084	cede(...)
		1085	PROTOTYPE:
		1086	CODE:
		1087	api_cede ();
		1088

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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 1.42 by root, Mon Dec 31 20:41:45 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 1.42 by root, Mon Dec 31 20:41:45 2001 UTC