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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.11 by root, Sat Jul 21 18:21:45 2001 UTC vs.
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#if 1	5	#include "libcoro/coro.c"
6	# define CHK(x) (void *)0	6
		7	#include <signal.h>
		8
		9	#ifdef HAVE_MMAP
		10	# include <unistd.h>
		11	# include <sys/mman.h>
		12	# ifndef MAP_ANONYMOUS
		13	# ifdef MAP_ANON
		14	# define MAP_ANONYMOUS MAP_ANON
7	#else	15	# else
8	# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x)	16	# undef HAVE_MMAP
		17	# endif
		18	# endif
9	#endif	19	#endif
10		20
11	#define MAY_FLUSH /* increases codesize */	21	#define MAY_FLUSH /* increases codesize and is rarely used */
12		22
13	#define SUB_INIT "Coro::State::initialize"	23	#define SUB_INIT "Coro::State::initialize"
		24	#define UCORO_STATE "_coro_state"
14		25
15	#define SAVE_DEFAV 0x00000001	26	/* The next macro should declare a variable stacklevel that contains and approximation
16	#define SAVE_DEFSV 0x00000002	27	* to the current C stack pointer. Its property is that it changes with each call
17	#define SAVE_ERRSV 0x00000004	28	* and should be unique. */
		29	#define dSTACKLEVEL void *stacklevel = &stacklevel
18		30
19	#define SAVE_ALL -1	31	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		32
		33	#define labs(l) ((l) >= 0 ? (l) : -(l))
		34
		35	#include "CoroAPI.h"
		36
		37	static struct CoroAPI coroapi;
		38
		39	/* this is actually not only the c stack but also c registers etc... */
		40	typedef struct {
		41	int refcnt; /* pointer reference counter */
		42	int usecnt; /* shared by how many coroutines */
		43	int gencnt; /* generation counter */
		44
		45	coro_context cctx;
		46
		47	void *sptr;
		48	long ssize; /* positive == mmap, otherwise malloc */
		49	} coro_stack;
20		50
21	struct coro {	51	struct coro {
		52	/* the optional C context */
		53	coro_stack *stack;
		54	void *cursp;
		55	int gencnt;
		56
22	/* optionally saved, might be zero */	57	/* optionally saved, might be zero */
23	AV *defav;	58	AV *defav;
24	SV *defsv;	59	SV *defsv;
25	SV *errsv;	60	SV *errsv;
26		61
27	/* saved global state not related to stacks */	62	/* saved global state not related to stacks */
28	U8 dowarn;	63	U8 dowarn;
		64	I32 in_eval;
29		65
30	/* the stacks and related info (callchain etc..) */	66	/* the stacks and related info (callchain etc..) */
31	PERL_SI *curstackinfo;	67	PERL_SI *curstackinfo;
32	AV *curstack;	68	AV *curstack;
33	AV *mainstack;	69	AV *mainstack;
34	SV **stack_sp;	70	SV **stack_sp;
35	OP *op;	71	OP *op;
36	SV **curpad;	72	SV **curpad;
		73	AV *comppad;
37	SV **stack_base;	74	SV **stack_base;
38	SV **stack_max;	75	SV **stack_max;
39	SV **tmps_stack;	76	SV **tmps_stack;
40	I32 tmps_floor;	77	I32 tmps_floor;
41	I32 tmps_ix;	78	I32 tmps_ix;
51	I32 savestack_max;	88	I32 savestack_max;
52	OP **retstack;	89	OP **retstack;
53	I32 retstack_ix;	90	I32 retstack_ix;
54	I32 retstack_max;	91	I32 retstack_max;
55	COP *curcop;	92	COP *curcop;
		93	JMPENV *top_env;
56		94
57	/* data associated with this coroutine (initial args) */	95	/* data associated with this coroutine (initial args) */
58	AV *args;	96	AV *args;
59	};	97	};
60		98
61	typedef struct coro *Coro__State;	99	typedef struct coro *Coro__State;
62	typedef struct coro *Coro__State_or_hashref;	100	typedef struct coro *Coro__State_or_hashref;
63		101
		102	static AV main_mainstack; / used to differentiate between $main and others */
		103	static HV *coro_state_stash;
		104	static SV *ucoro_state_sv;
		105	static U32 ucoro_state_hash;
64	static HV *padlist_cache;	106	static HV *padlist_cache;
		107	static SV coro_mortal; / will be freed after next transfer */
65		108
66	/* mostly copied from op.c:cv_clone2 */	109	/* mostly copied from op.c:cv_clone2 */
67	STATIC AV *	110	STATIC AV *
68	clone_padlist (AV *protopadlist)	111	clone_padlist (AV *protopadlist)
69	{	112	{
…		…
156		199
157	return newpadlist;	200	return newpadlist;
158	}	201	}
159		202
160	#ifdef MAY_FLUSH	203	#ifdef MAY_FLUSH
161	STATIC AV *	204	STATIC void
162	free_padlist (AV *padlist)	205	free_padlist (AV *padlist)
163	{	206	{
164	/* may be during global destruction */	207	/* may be during global destruction */
165	if (SvREFCNT(padlist))	208	if (SvREFCNT(padlist))
166	{	209	{
…		…
231	#endif	274	#endif
232		275
233	#define SB do {	276	#define SB do {
234	#define SE } while (0)	277	#define SE } while (0)
235		278
236	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	279	#define LOAD(state) load_state(aTHX_ (state));
237	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
238		281
239	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
240		283
241	static void	284	static void
242	load_state(pTHX_ Coro__State c)	285	load_state(pTHX_ Coro__State c)
243	{	286	{
244	PL_dowarn = c->dowarn;	287	PL_dowarn = c->dowarn;
		288	PL_in_eval = c->in_eval;
245		289
246	PL_curstackinfo = c->curstackinfo;	290	PL_curstackinfo = c->curstackinfo;
247	PL_curstack = c->curstack;	291	PL_curstack = c->curstack;
248	PL_mainstack = c->mainstack;	292	PL_mainstack = c->mainstack;
249	PL_stack_sp = c->stack_sp;	293	PL_stack_sp = c->stack_sp;
250	PL_op = c->op;	294	PL_op = c->op;
251	PL_curpad = c->curpad;	295	PL_curpad = c->curpad;
		296	PL_comppad = c->comppad;
252	PL_stack_base = c->stack_base;	297	PL_stack_base = c->stack_base;
253	PL_stack_max = c->stack_max;	298	PL_stack_max = c->stack_max;
254	PL_tmps_stack = c->tmps_stack;	299	PL_tmps_stack = c->tmps_stack;
255	PL_tmps_floor = c->tmps_floor;	300	PL_tmps_floor = c->tmps_floor;
256	PL_tmps_ix = c->tmps_ix;	301	PL_tmps_ix = c->tmps_ix;
…		…
266	PL_savestack_max = c->savestack_max;	311	PL_savestack_max = c->savestack_max;
267	PL_retstack = c->retstack;	312	PL_retstack = c->retstack;
268	PL_retstack_ix = c->retstack_ix;	313	PL_retstack_ix = c->retstack_ix;
269	PL_retstack_max = c->retstack_max;	314	PL_retstack_max = c->retstack_max;
270	PL_curcop = c->curcop;	315	PL_curcop = c->curcop;
		316	PL_top_env = c->top_env;
271		317
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275		321
…		…
314		360
315	PUSHs (Nullsv);	361	PUSHs (Nullsv);
316	/* this loop was inspired by pp_caller */	362	/* this loop was inspired by pp_caller */
317	for (;;)	363	for (;;)
318	{	364	{
319	do	365	while (cxix >= 0)
320	{	366	{
321	PERL_CONTEXT *cx = &ccstk[cxix--];	367	PERL_CONTEXT *cx = &ccstk[cxix--];
322		368
323	if (CxTYPE(cx) == CXt_SUB)	369	if (CxTYPE(cx) == CXt_SUB)
324	{	370	{
…		…
350	/* I never used formats, so how should I know how these are implemented? */	396	/* I never used formats, so how should I know how these are implemented? */
351	/* my bold guess is as a simple, plain sub... */	397	/* my bold guess is as a simple, plain sub... */
352	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	398	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
353	}	399	}
354	}	400	}
355	while (cxix >= 0);
356		401
357	if (top_si->si_type == PERLSI_MAIN)	402	if (top_si->si_type == PERLSI_MAIN)
358	break;	403	break;
359		404
360	top_si = top_si->si_prev;	405	top_si = top_si->si_prev;
…		…
363	}	408	}
364		409
365	PUTBACK;	410	PUTBACK;
366	}	411	}
367		412
368	c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	413	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
369	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	414	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
370	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	415	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
371
372	/* I have not the slightest idea of why av_reify is necessary */
373	/* but if it's missing the defav contents magically get replaced sometimes */
374	if (c->defav)
375	av_reify (c->defav);
376		416
377	c->dowarn = PL_dowarn;	417	c->dowarn = PL_dowarn;
		418	c->in_eval = PL_in_eval;
378		419
379	c->curstackinfo = PL_curstackinfo;	420	c->curstackinfo = PL_curstackinfo;
380	c->curstack = PL_curstack;	421	c->curstack = PL_curstack;
381	c->mainstack = PL_mainstack;	422	c->mainstack = PL_mainstack;
382	c->stack_sp = PL_stack_sp;	423	c->stack_sp = PL_stack_sp;
383	c->op = PL_op;	424	c->op = PL_op;
384	c->curpad = PL_curpad;	425	c->curpad = PL_curpad;
		426	c->comppad = PL_comppad;
385	c->stack_base = PL_stack_base;	427	c->stack_base = PL_stack_base;
386	c->stack_max = PL_stack_max;	428	c->stack_max = PL_stack_max;
387	c->tmps_stack = PL_tmps_stack;	429	c->tmps_stack = PL_tmps_stack;
388	c->tmps_floor = PL_tmps_floor;	430	c->tmps_floor = PL_tmps_floor;
389	c->tmps_ix = PL_tmps_ix;	431	c->tmps_ix = PL_tmps_ix;
…		…
399	c->savestack_max = PL_savestack_max;	441	c->savestack_max = PL_savestack_max;
400	c->retstack = PL_retstack;	442	c->retstack = PL_retstack;
401	c->retstack_ix = PL_retstack_ix;	443	c->retstack_ix = PL_retstack_ix;
402	c->retstack_max = PL_retstack_max;	444	c->retstack_max = PL_retstack_max;
403	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;
404	}	489	}
405		490
406	/*	491	/*
407	* destroy the stacks, the callchain etc...	492	* destroy the stacks, the callchain etc...
408	* still there is a memleak of 128 bytes...	493	* still there is a memleak of 128 bytes...
409	*/	494	*/
410	STATIC void	495	STATIC void
411	destroy_stacks(pTHX)	496	destroy_stacks(pTHX)
412	{	497	{
		498	if (!IN_DESTRUCT)
		499	{
413	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
414	while (PL_scopestack_ix)	501	while (PL_scopestack_ix)
415	LEAVE;	502	LEAVE;
416		503
417	/* sure it is, but more important: is it correct?? :/ */	504	/* sure it is, but more important: is it correct?? :/ */
418	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	505	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
419	FREETMPS;	506	FREETMPS;
		507	}
420		508
421	while (PL_curstackinfo->si_next)	509	while (PL_curstackinfo->si_next)
422	PL_curstackinfo = PL_curstackinfo->si_next;	510	PL_curstackinfo = PL_curstackinfo->si_next;
423		511
424	while (PL_curstackinfo)	512	while (PL_curstackinfo)
…		…
429	dSP;	517	dSP;
430	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
431	PUTBACK; /* possibly superfluous */	519	PUTBACK; /* possibly superfluous */
432	}	520	}
433		521
		522	if (!IN_DESTRUCT)
		523	{
434	dounwind(-1);	524	dounwind(-1);
435
436	SvREFCNT_dec(PL_curstackinfo->si_stack);	525	SvREFCNT_dec(PL_curstackinfo->si_stack);
		526	}
		527
437	Safefree(PL_curstackinfo->si_cxstack);	528	Safefree(PL_curstackinfo->si_cxstack);
438	Safefree(PL_curstackinfo);	529	Safefree(PL_curstackinfo);
439	PL_curstackinfo = p;	530	PL_curstackinfo = p;
440	}	531	}
441		532
…		…
444	Safefree(PL_scopestack);	535	Safefree(PL_scopestack);
445	Safefree(PL_savestack);	536	Safefree(PL_savestack);
446	Safefree(PL_retstack);	537	Safefree(PL_retstack);
447	}	538	}
448		539
		540	static void
		541	allocate_stack (Coro__State ctx, int alloc)
		542	{
		543	coro_stack *stack;
		544
		545	New (0, stack, 1, coro_stack);
		546
		547	stack->refcnt = 1;
		548	stack->usecnt = 1;
		549	stack->gencnt = ctx->gencnt = 0;
		550	if (alloc)
		551	{
		552	#if HAVE_MMAP
		553	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
		554	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		555	if (stack->sptr == (void *)-1)
		556	#endif
		557	{
		558	/FIXME//D//* reasonable stack size! */
		559	stack->ssize = -4096 * sizeof (long);
		560	New (0, stack->sptr, 4096, long);
		561	}
		562	}
		563	else
		564	stack->sptr = 0;
		565
		566	ctx->stack = stack;
		567	}
		568
		569	static void
		570	deallocate_stack (Coro__State ctx)
		571	{
		572	coro_stack *stack = ctx->stack;
		573
		574	ctx->stack = 0;
		575
		576	if (stack)
		577	{
		578	if (!--stack->refcnt)
		579	{
		580	#ifdef HAVE_MMAP
		581	if (stack->ssize > 0 && stack->sptr)
		582	munmap (stack->sptr, stack->ssize);
		583	else
		584	#else
		585	Safefree (stack->sptr);
		586	#endif
		587	Safefree (stack);
		588	}
		589	else if (ctx->gencnt == stack->gencnt)
		590	--stack->usecnt;
		591	}
		592	}
		593
		594	static void
		595	setup_coro (void *arg)
		596	{
		597	/*
		598	* emulate part of the perl startup here.
		599	*/
		600	dSP;
		601	Coro__State ctx = (Coro__State)arg;
		602	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		603
		604	coro_init_stacks (aTHX);
		605	/PL_curcop = 0;/
		606	/PL_in_eval = PL_in_eval;/ /* inherit */
		607	SvREFCNT_dec (GvAV (PL_defgv));
		608	GvAV (PL_defgv) = ctx->args;
		609
		610	SPAGAIN;
		611
		612	if (ctx->stack)
		613	{
		614	ctx->cursp = 0;
		615
		616	PUSHMARK(SP);
		617	PUTBACK;
		618	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		619
		620	if (SvTRUE (ERRSV))
		621	croak (NULL);
		622	else
		623	croak ("FATAL: CCTXT coroutine returned!");
		624	}
		625	else
		626	{
		627	UNOP myop;
		628
		629	PL_op = (OP *)&myop;
		630
		631	Zero(&myop, 1, UNOP);
		632	myop.op_next = Nullop;
		633	myop.op_flags = OPf_WANT_VOID;
		634
		635	PUSHMARK(SP);
		636	XPUSHs (sub_init);
		637	/*
		638	* the next line is slightly wrong, as PL_op->op_next
		639	* is actually being executed so we skip the first op.
		640	* that doesn't matter, though, since it is only
		641	* pp_nextstate and we never return...
		642	* ah yes, and I don't care anyways ;)
		643	*/
		644	PUTBACK;
		645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		646	SPAGAIN;
		647
		648	ENTER; /* necessary e.g. for dounwind */
		649	}
		650	}
		651
		652	static void
		653	continue_coro (void *arg)
		654	{
		655	/*
		656	* this is a _very_ stripped down perl interpreter ;)
		657	*/
		658	Coro__State ctx = (Coro__State)arg;
		659	JMPENV coro_start_env;
		660
		661	/* same as JMPENV_BOOTSTRAP */
		662	Zero(&coro_start_env, 1, JMPENV);
		663	coro_start_env.je_ret = -1;
		664	coro_start_env.je_mustcatch = TRUE;
		665	PL_top_env = &coro_start_env;
		666
		667	ctx->cursp = 0;
		668	PL_op = PL_op->op_next;
		669	CALLRUNOPS(aTHX);
		670
		671	abort ();
		672	}
		673
449	STATIC void	674	STATIC void
450	transfer(pTHX_ struct coro prev, struct coro next, int flags)	675	transfer(pTHX_ struct coro prev, struct coro next, int flags)
451	{	676	{
452	dSP;	677	dSTACKLEVEL;
		678	static struct coro *xnext;
453		679
454	if (prev != next)	680	if (prev != next)
455	{	681	{
456	/*	682	xnext = next;
457	* this could be done in newprocess which would lead to	683
458	* extremely elegant and fast (just SAVE/LOAD)
459	* code here, but lazy allocation of stacks has also
460	* some virtues and the overhead of the if() is nil.
461	*/
462	if (next->mainstack)	684	if (next->mainstack)
463	{	685	{
464	SAVE (prev, flags);	686	SAVE (prev, flags);
465	LOAD (next);	687	LOAD (next);
		688
466	/* mark this state as in-use */	689	/* mark this state as in-use */
467	next->mainstack = 0;	690	next->mainstack = 0;
468	next->tmps_ix = -2;	691	next->tmps_ix = -2;
		692
		693	/* stacklevel changed? if yes, grab the stack for us! */
		694	if (flags & TRANSFER_SAVE_CCTXT)
		695	{
		696	if (!prev->stack)
		697	allocate_stack (prev, 0);
		698	else if (prev->cursp != stacklevel
		699	&& prev->stack->usecnt > 1)
		700	{
		701	prev->gencnt = ++prev->stack->gencnt;
		702	prev->stack->usecnt = 1;
		703	}
		704
		705	/* has our stack been invalidated? */
		706	if (next->stack && next->stack->gencnt != next->gencnt)
		707	{
		708	deallocate_stack (next);
		709	allocate_stack (next, 1);
		710	coro_create (&(next->stack->cctx),
		711	continue_coro, (void *)next,
		712	next->stack->sptr, labs (next->stack->ssize));
		713	}
		714
		715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		716	/* don't add any code here */
		717	}
		718
469	}	719	}
470	else if (next->tmps_ix == -2)	720	else if (next->tmps_ix == -2)
471	{
472	croak ("tried to transfer to running coroutine");	721	croak ("tried to transfer to running coroutine");
473	}
474	else	722	else
475	{	723	{
476	/*
477	* emulate part of the perl startup here.
478	*/
479	UNOP myop;
480
481	SAVE (prev, -1); /* first get rid of the old state */	724	SAVE (prev, -1); /* first get rid of the old state */
482		725
483	init_stacks (); /* from perl.c */	726	if (flags & TRANSFER_SAVE_CCTXT)
484	SPAGAIN;
485
486	PL_op = (OP *)&myop;
487	/PL_curcop = 0;/
488	SvREFCNT_dec (GvAV (PL_defgv));
489	GvAV (PL_defgv) = next->args;
490
491	Zero(&myop, 1, UNOP);
492	myop.op_next = Nullop;
493	myop.op_flags = OPf_WANT_VOID;
494
495	PUSHMARK(SP);
496	XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
497	/*
498	* the next line is slightly wrong, as PL_op->op_next
499	* is actually being executed so we skip the first op.
500	* that doesn't matter, though, since it is only
501	* pp_nextstate and we never return...
502	* ah yes, and I don't care anyways ;)
503	*/	727	{
504	PUTBACK;	728	if (!prev->stack)
505	PL_op = pp_entersub(aTHX);	729	allocate_stack (prev, 0);
506	SPAGAIN;
507		730
508	ENTER; /* necessary e.g. for dounwind */	731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		732	{
		733	setup_coro (next);
		734
		735	prev->stack->refcnt++;
		736	prev->stack->usecnt++;
		737	next->stack = prev->stack;
		738	next->gencnt = prev->gencnt;
		739	}
		740	else
		741	{
		742	allocate_stack (next, 1);
		743	coro_create (&(next->stack->cctx),
		744	setup_coro, (void *)next,
		745	next->stack->sptr, labs (next->stack->ssize));
		746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		747	/* don't add any code here */
		748	}
		749	}
		750	else
		751	setup_coro (next);
		752	}
		753
		754	/*
		755	* xnext is now either prev or next, depending on wether
		756	* we switched the c stack or not. that's why I use a global
		757	* variable, that should become thread-specific at one point.
		758	*/
		759	xnext->cursp = stacklevel;
		760	}
		761
		762	if (coro_mortal)
		763	{
		764	SvREFCNT_dec (coro_mortal);
		765	coro_mortal = 0;
		766	}
		767	}
		768
		769	#define SV_CORO(sv,func) \
		770	do { \
		771	if (SvROK (sv)) \
		772	sv = SvRV (sv); \
		773	\
		774	if (SvTYPE(sv) == SVt_PVHV) \
		775	{ \
		776	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		777	\
		778	if (!he) \
		779	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		780	\
		781	(sv) = SvRV (HeVAL(he)); \
		782	} \
		783	\
		784	/* must also be changed inside Coro::Cont::yield */ \
		785	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		786	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		787	\
		788	} while(0)
		789
		790	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		791
		792	static void
		793	api_transfer(pTHX_ SV prev, SV next, int flags)
		794	{
		795	SV_CORO (prev, "Coro::transfer");
		796	SV_CORO (next, "Coro::transfer");
		797
		798	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		799	}
		800
		801	/ Coro ******************************************************************/
		802
		803	#define PRIO_MAX 3
		804	#define PRIO_HIGH 1
		805	#define PRIO_NORMAL 0
		806	#define PRIO_LOW -1
		807	#define PRIO_IDLE -3
		808	#define PRIO_MIN -4
		809
		810	/* for Coro.pm */
		811	static GV coro_current, coro_idle;
		812	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		813	static int coro_nready;
		814
		815	static void
		816	coro_enq (SV *sv)
		817	{
		818	if (SvTYPE (sv) == SVt_PVHV)
		819	{
		820	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		821	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		822
		823	prio = prio > PRIO_MAX ? PRIO_MAX
		824	: prio < PRIO_MIN ? PRIO_MIN
		825	: prio;
		826
		827	av_push (coro_ready [prio - PRIO_MIN], sv);
		828	coro_nready++;
		829
		830	return;
		831	}
		832
		833	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		834	}
		835
		836	static SV *
		837	coro_deq (int min_prio)
		838	{
		839	int prio = PRIO_MAX - PRIO_MIN;
		840
		841	min_prio -= PRIO_MIN;
		842	if (min_prio < 0)
		843	min_prio = 0;
		844
		845	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		846	if (av_len (coro_ready[prio]) >= 0)
		847	{
		848	coro_nready--;
		849	return av_shift (coro_ready[prio]);
509	}	850	}
510	}	851
		852	return 0;
		853	}
		854
		855	static void
		856	api_ready (SV *coro)
		857	{
		858	if (SvROK (coro))
		859	coro = SvRV (coro);
		860
		861	coro_enq (SvREFCNT_inc (coro));
		862	}
		863
		864	static void
		865	api_schedule (void)
		866	{
		867	SV prev, next;
		868
		869	prev = SvRV (GvSV (coro_current));
		870	next = coro_deq (PRIO_MIN);
		871
		872	if (!next)
		873	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		874
		875	/* free this only after the transfer */
		876	coro_mortal = prev;
		877	SV_CORO (prev, "Coro::schedule");
		878
		879	SvRV (GvSV (coro_current)) = next;
		880
		881	SV_CORO (next, "Coro::schedule");
		882
		883	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		884	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		885	}
		886
		887	static void
		888	api_cede (void)
		889	{
		890	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		891
		892	api_schedule ();
511	}	893	}
512		894
513	MODULE = Coro::State PACKAGE = Coro::State	895	MODULE = Coro::State PACKAGE = Coro::State
514		896
515	PROTOTYPES: ENABLE	897	PROTOTYPES: ENABLE
516		898
517	BOOT:	899	BOOT:
518	{ /* {} necessary for stoopid perl-5.6.x */	900	{ /* {} necessary for stoopid perl-5.6.x */
		901	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		902	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
519	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	903	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
520		904
521	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	905	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
522	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	906	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
523	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	907	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		908	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
524		909
525	if (!padlist_cache)	910	if (!padlist_cache)
526	padlist_cache = newHV ();	911	padlist_cache = newHV ();
		912
		913	main_mainstack = PL_mainstack;
		914
		915	coroapi.ver = CORO_API_VERSION;
		916	coroapi.transfer = api_transfer;
527	}	917	}
528		918
529	Coro::State	919	Coro::State
530	_newprocess(args)	920	_newprocess(args)
531	SV * args	921	SV * args
…		…
536	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	926	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
537	croak ("Coro::State::_newprocess expects an arrayref");	927	croak ("Coro::State::_newprocess expects an arrayref");
538		928
539	New (0, coro, 1, struct coro);	929	New (0, coro, 1, struct coro);
540		930
		931	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
541	coro->mainstack = 0; /* actual work is done inside transfer */	932	coro->mainstack = 0; /* actual work is done inside transfer */
542	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	933	coro->stack = 0;
543		934
544	RETVAL = coro;	935	RETVAL = coro;
545	OUTPUT:	936	OUTPUT:
546	RETVAL	937	RETVAL
547		938
548	void	939	void
549	transfer(prev, next, flags = SAVE_ALL)	940	transfer(prev, next, flags)
550	Coro::State_or_hashref prev	941	SV *prev
551	Coro::State_or_hashref next	942	SV *next
552	int flags	943	int flags
553	PROTOTYPE: @	944	PROTOTYPE: @
554	CODE:	945	CODE:
555		946	PUTBACK;
		947	SV_CORO (next, "Coro::transfer");
		948	SV_CORO (prev, "Coro::transfer");
556	transfer (aTHX_ prev, next, flags);	949	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		950	SPAGAIN;
557		951
558	void	952	void
559	DESTROY(coro)	953	DESTROY(coro)
560	Coro::State coro	954	Coro::State coro
561	CODE:	955	CODE:
562		956
563	if (coro->mainstack)	957	if (coro->mainstack && coro->mainstack != main_mainstack)
564	{	958	{
565	struct coro temp;	959	struct coro temp;
566		960
		961	PUTBACK;
567	SAVE(aTHX_ (&temp), SAVE_ALL);	962	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
568	LOAD(aTHX_ coro);	963	LOAD(aTHX_ coro);
		964	SPAGAIN;
569		965
570	destroy_stacks ();	966	destroy_stacks (aTHX);
571		967
572	LOAD((&temp)); /* this will get rid of defsv etc.. */	968	LOAD((&temp)); /* this will get rid of defsv etc.. */
		969	SPAGAIN;
		970
		971	coro->mainstack = 0;
573	}	972	}
		973
		974	deallocate_stack (coro);
574		975
575	Safefree (coro);	976	Safefree (coro);
576		977
577	void	978	void
578	flush()	979	flush()
579	CODE:	980	CODE:
580	#ifdef MAY_FLUSH	981	#ifdef MAY_FLUSH
581	flush_padlist_cache ();	982	flush_padlist_cache ();
582	#endif	983	#endif
583		984
		985	void
		986	_exit(code)
		987	int code
		988	PROTOTYPE: $
		989	CODE:
		990	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		991	_exit (code);
		992	#else
		993	signal (SIGTERM, SIG_DFL);
		994	raise (SIGTERM);
		995	exit (code);
		996	#endif
		997
584	MODULE = Coro::State PACKAGE = Coro::Cont	998	MODULE = Coro::State PACKAGE = Coro::Cont
585		999
586	# this is dirty (do you hear me?) and should be in it's own .xs	1000	# this is slightly dirty (should expose a c-level api)
587		1001
588	void	1002	void
589	result(...)	1003	yield(...)
590	PROTOTYPE: @	1004	PROTOTYPE: @
591	CODE:	1005	CODE:
592	static SV *returnstk;	1006	static SV *returnstk;
593	SV *sv;	1007	SV *sv;
594	AV *defav = GvAV (PL_defgv);	1008	AV *defav = GvAV (PL_defgv);
…		…
606	mg_get (returnstk); /* isn't documentation wrong for mg_get? */	1020	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
607	sv = av_pop ((AV *)SvRV (returnstk));	1021	sv = av_pop ((AV *)SvRV (returnstk));
608	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));	1022	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
609	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1023	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
610	SvREFCNT_dec (sv);	1024	SvREFCNT_dec (sv);
		1025
611	transfer(prev, next, 0);	1026	transfer(aTHX_ prev, next, 0);
612		1027
		1028	MODULE = Coro::State PACKAGE = Coro
		1029
		1030	# this is slightly dirty (should expose a c-level api)
		1031
		1032	BOOT:
		1033	{
		1034	int i;
		1035	HV *stash = gv_stashpv ("Coro", TRUE);
		1036
		1037	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1038	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1039	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1040	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1041	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1042	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1043
		1044	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1045	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1046
		1047	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1048	coro_ready[i] = newAV ();
		1049
		1050	{
		1051	SV *sv = perl_get_sv("Coro::API", 1);
		1052
		1053	coroapi.schedule = api_schedule;
		1054	coroapi.cede = api_cede;
		1055	coroapi.ready = api_ready;
		1056	coroapi.nready = &coro_nready;
		1057	coroapi.current = coro_current;
		1058
		1059	GCoroAPI = &coroapi;
		1060	sv_setiv(sv, (IV)&coroapi);
		1061	SvREADONLY_on(sv);
		1062	}
		1063	}
		1064
		1065	void
		1066	ready(self)
		1067	SV * self
		1068	PROTOTYPE: $
		1069	CODE:
		1070	api_ready (self);
		1071
		1072	int
		1073	nready(...)
		1074	PROTOTYPE:
		1075	CODE:
		1076	RETVAL = coro_nready;
		1077	OUTPUT:
		1078	RETVAL
		1079
		1080	void
		1081	schedule(...)
		1082	PROTOTYPE:
		1083	CODE:
		1084	api_schedule ();
		1085
		1086	void
		1087	cede(...)
		1088	PROTOTYPE:
		1089	CODE:
		1090	api_cede ();
		1091

Diff Legend

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

Comparing Coro/Coro/State.xs (file contents): Revision 1.11 by root, Sat Jul 21 18:21:45 2001 UTC vs. Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.11 by root, Sat Jul 21 18:21:45 2001 UTC vs.
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC