[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 1.47 by pcg, Sat Nov 15 03:53:10 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 "patchlevel.h"
6	# define CHK(x) (void *)0	6
7	#else	7	#if PATCHLEVEL < 6
8	# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x)	8	# ifndef PL_ppaddr
		9	# define PL_ppaddr ppaddr
9	#endif	10	# endif
		11	# ifndef call_sv
		12	# define call_sv perl_call_sv
		13	# endif
		14	# ifndef get_sv
		15	# define get_sv perl_get_sv
		16	# endif
		17	# ifndef get_cv
		18	# define get_cv perl_get_cv
		19	# endif
		20	# ifndef IS_PADGV
		21	# define IS_PADGV(v) 0
		22	# endif
		23	# ifndef IS_PADCONST
		24	# define IS_PADCONST(v) 0
		25	# endif
		26	#endif
10		27
		28	#include "libcoro/coro.c"
		29
		30	#include <signal.h>
		31
		32	#ifdef HAVE_MMAP
		33	# include <unistd.h>
		34	# include <sys/mman.h>
		35	# ifndef MAP_ANONYMOUS
		36	# ifdef MAP_ANON
		37	# define MAP_ANONYMOUS MAP_ANON
		38	# else
		39	# undef HAVE_MMAP
		40	# endif
		41	# endif
		42	#endif
		43
11	#define MAY_FLUSH /* increases codesize */	44	#define MAY_FLUSH /* increases codesize and is rarely used */
12		45
13	#define SUB_INIT "Coro::State::initialize"	46	#define SUB_INIT "Coro::State::initialize"
		47	#define UCORO_STATE "_coro_state"
14		48
15	#define SAVE_DEFAV 0x00000001	49	/* The next macro should declare a variable stacklevel that contains and approximation
16	#define SAVE_DEFSV 0x00000002	50	* to the current C stack pointer. Its property is that it changes with each call
17	#define SAVE_ERRSV 0x00000004	51	* and should be unique. */
		52	#define dSTACKLEVEL void *stacklevel = &stacklevel
18		53
19	#define SAVE_ALL -1	54	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		55
		56	#define labs(l) ((l) >= 0 ? (l) : -(l))
		57
		58	#include "CoroAPI.h"
		59
		60	static struct CoroAPI coroapi;
		61
		62	/* this is actually not only the c stack but also c registers etc... */
		63	typedef struct {
		64	int refcnt; /* pointer reference counter */
		65	int usecnt; /* shared by how many coroutines */
		66	int gencnt; /* generation counter */
		67
		68	coro_context cctx;
		69
		70	void *sptr;
		71	long ssize; /* positive == mmap, otherwise malloc */
		72	} coro_stack;
20		73
21	struct coro {	74	struct coro {
		75	/* the top-level JMPENV for each coroutine, needed to catch dies. */
		76	JMPENV start_env;
		77
		78	/* the optional C context */
		79	coro_stack *stack;
		80	void *cursp;
		81	int gencnt;
		82
22	/* optionally saved, might be zero */	83	/* optionally saved, might be zero */
23	AV *defav;	84	AV *defav;
24	SV *defsv;	85	SV *defsv;
25	SV *errsv;	86	SV *errsv;
26		87
27	/* saved global state not related to stacks */	88	/* saved global state not related to stacks */
28	U8 dowarn;	89	U8 dowarn;
		90	I32 in_eval;
29		91
30	/* the stacks and related info (callchain etc..) */	92	/* the stacks and related info (callchain etc..) */
31	PERL_SI *curstackinfo;	93	PERL_SI *curstackinfo;
32	AV *curstack;	94	AV *curstack;
33	AV *mainstack;	95	AV *mainstack;
34	SV **stack_sp;	96	SV **stack_sp;
35	OP *op;	97	OP *op;
36	SV **curpad;	98	SV **curpad;
		99	AV *comppad;
37	SV **stack_base;	100	SV **stack_base;
38	SV **stack_max;	101	SV **stack_max;
39	SV **tmps_stack;	102	SV **tmps_stack;
40	I32 tmps_floor;	103	I32 tmps_floor;
41	I32 tmps_ix;	104	I32 tmps_ix;
51	I32 savestack_max;	114	I32 savestack_max;
52	OP **retstack;	115	OP **retstack;
53	I32 retstack_ix;	116	I32 retstack_ix;
54	I32 retstack_max;	117	I32 retstack_max;
55	COP *curcop;	118	COP *curcop;
		119	JMPENV *top_env;
56		120
57	/* data associated with this coroutine (initial args) */	121	/* data associated with this coroutine (initial args) */
58	AV *args;	122	AV *args;
59	};	123	};
60		124
61	typedef struct coro *Coro__State;	125	typedef struct coro *Coro__State;
62	typedef struct coro *Coro__State_or_hashref;	126	typedef struct coro *Coro__State_or_hashref;
63		127
		128	static AV main_mainstack; / used to differentiate between $main and others */
		129	static HV *coro_state_stash;
		130	static SV *ucoro_state_sv;
		131	static U32 ucoro_state_hash;
64	static HV *padlist_cache;	132	static HV *padlist_cache;
		133	static SV coro_mortal; / will be freed after next transfer */
65		134
66	/* mostly copied from op.c:cv_clone2 */	135	/* mostly copied from op.c:cv_clone2 */
67	STATIC AV *	136	STATIC AV *
68	clone_padlist (AV *protopadlist)	137	clone_padlist (AV *protopadlist)
69	{	138	{
…		…
156		225
157	return newpadlist;	226	return newpadlist;
158	}	227	}
159		228
160	#ifdef MAY_FLUSH	229	#ifdef MAY_FLUSH
161	STATIC AV *	230	STATIC void
162	free_padlist (AV *padlist)	231	free_padlist (AV *padlist)
163	{	232	{
164	/* may be during global destruction */	233	/* may be during global destruction */
165	if (SvREFCNT(padlist))	234	if (SvREFCNT(padlist))
166	{	235	{
…		…
231	#endif	300	#endif
232		301
233	#define SB do {	302	#define SB do {
234	#define SE } while (0)	303	#define SE } while (0)
235		304
236	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	305	#define LOAD(state) load_state(aTHX_ (state));
237	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
238		307
239	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
240		309
241	static void	310	static void
242	load_state(pTHX_ Coro__State c)	311	load_state(pTHX_ Coro__State c)
243	{	312	{
244	PL_dowarn = c->dowarn;	313	PL_dowarn = c->dowarn;
		314	PL_in_eval = c->in_eval;
245		315
246	PL_curstackinfo = c->curstackinfo;	316	PL_curstackinfo = c->curstackinfo;
247	PL_curstack = c->curstack;	317	PL_curstack = c->curstack;
248	PL_mainstack = c->mainstack;	318	PL_mainstack = c->mainstack;
249	PL_stack_sp = c->stack_sp;	319	PL_stack_sp = c->stack_sp;
250	PL_op = c->op;	320	PL_op = c->op;
251	PL_curpad = c->curpad;	321	PL_curpad = c->curpad;
		322	PL_comppad = c->comppad;
252	PL_stack_base = c->stack_base;	323	PL_stack_base = c->stack_base;
253	PL_stack_max = c->stack_max;	324	PL_stack_max = c->stack_max;
254	PL_tmps_stack = c->tmps_stack;	325	PL_tmps_stack = c->tmps_stack;
255	PL_tmps_floor = c->tmps_floor;	326	PL_tmps_floor = c->tmps_floor;
256	PL_tmps_ix = c->tmps_ix;	327	PL_tmps_ix = c->tmps_ix;
…		…
266	PL_savestack_max = c->savestack_max;	337	PL_savestack_max = c->savestack_max;
267	PL_retstack = c->retstack;	338	PL_retstack = c->retstack;
268	PL_retstack_ix = c->retstack_ix;	339	PL_retstack_ix = c->retstack_ix;
269	PL_retstack_max = c->retstack_max;	340	PL_retstack_max = c->retstack_max;
270	PL_curcop = c->curcop;	341	PL_curcop = c->curcop;
		342	PL_top_env = c->top_env;
271		343
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275		347
…		…
314		386
315	PUSHs (Nullsv);	387	PUSHs (Nullsv);
316	/* this loop was inspired by pp_caller */	388	/* this loop was inspired by pp_caller */
317	for (;;)	389	for (;;)
318	{	390	{
319	do	391	while (cxix >= 0)
320	{	392	{
321	PERL_CONTEXT *cx = &ccstk[cxix--];	393	PERL_CONTEXT *cx = &ccstk[cxix--];
322		394
323	if (CxTYPE(cx) == CXt_SUB)	395	if (CxTYPE(cx) == CXt_SUB)
324	{	396	{
…		…
343	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
344		416
345	get_padlist (cv); /* this is a monster */	417	get_padlist (cv); /* this is a monster */
346	}	418	}
347	}	419	}
		420	#ifdef CXt_FORMAT
348	else if (CxTYPE(cx) == CXt_FORMAT)	421	else if (CxTYPE(cx) == CXt_FORMAT)
349	{	422	{
350	/* I never used formats, so how should I know how these are implemented? */	423	/* I never used formats, so how should I know how these are implemented? */
351	/* my bold guess is as a simple, plain sub... */	424	/* my bold guess is as a simple, plain sub... */
352	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	425	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
353	}	426	}
		427	#endif
354	}	428	}
355	while (cxix >= 0);
356		429
357	if (top_si->si_type == PERLSI_MAIN)	430	if (top_si->si_type == PERLSI_MAIN)
358	break;	431	break;
359		432
360	top_si = top_si->si_prev;	433	top_si = top_si->si_prev;
…		…
363	}	436	}
364		437
365	PUTBACK;	438	PUTBACK;
366	}	439	}
367		440
368	c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	441	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
369	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
370	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	443	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		444
377	c->dowarn = PL_dowarn;	445	c->dowarn = PL_dowarn;
		446	c->in_eval = PL_in_eval;
378		447
379	c->curstackinfo = PL_curstackinfo;	448	c->curstackinfo = PL_curstackinfo;
380	c->curstack = PL_curstack;	449	c->curstack = PL_curstack;
381	c->mainstack = PL_mainstack;	450	c->mainstack = PL_mainstack;
382	c->stack_sp = PL_stack_sp;	451	c->stack_sp = PL_stack_sp;
383	c->op = PL_op;	452	c->op = PL_op;
384	c->curpad = PL_curpad;	453	c->curpad = PL_curpad;
		454	c->comppad = PL_comppad;
385	c->stack_base = PL_stack_base;	455	c->stack_base = PL_stack_base;
386	c->stack_max = PL_stack_max;	456	c->stack_max = PL_stack_max;
387	c->tmps_stack = PL_tmps_stack;	457	c->tmps_stack = PL_tmps_stack;
388	c->tmps_floor = PL_tmps_floor;	458	c->tmps_floor = PL_tmps_floor;
389	c->tmps_ix = PL_tmps_ix;	459	c->tmps_ix = PL_tmps_ix;
…		…
399	c->savestack_max = PL_savestack_max;	469	c->savestack_max = PL_savestack_max;
400	c->retstack = PL_retstack;	470	c->retstack = PL_retstack;
401	c->retstack_ix = PL_retstack_ix;	471	c->retstack_ix = PL_retstack_ix;
402	c->retstack_max = PL_retstack_max;	472	c->retstack_max = PL_retstack_max;
403	c->curcop = PL_curcop;	473	c->curcop = PL_curcop;
		474	c->top_env = PL_top_env;
		475	}
		476
		477	/*
		478	* allocate various perl stacks. This is an exact copy
		479	* of perl.c:init_stacks, except that it uses less memory
		480	* on the assumption that coroutines do not usually need
		481	* a lot of stackspace.
		482	*/
		483	STATIC void
		484	coro_init_stacks (pTHX)
		485	{
		486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		487	PL_curstackinfo->si_type = PERLSI_MAIN;
		488	PL_curstack = PL_curstackinfo->si_stack;
		489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		490
		491	PL_stack_base = AvARRAY(PL_curstack);
		492	PL_stack_sp = PL_stack_base;
		493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		494
		495	New(50,PL_tmps_stack,96,SV*);
		496	PL_tmps_floor = -1;
		497	PL_tmps_ix = -1;
		498	PL_tmps_max = 96;
		499
		500	New(54,PL_markstack,16,I32);
		501	PL_markstack_ptr = PL_markstack;
		502	PL_markstack_max = PL_markstack + 16;
		503
		504	#ifdef SET_MARK_OFFSET
		505	SET_MARK_OFFSET;
		506	#endif
		507
		508	New(54,PL_scopestack,16,I32);
		509	PL_scopestack_ix = 0;
		510	PL_scopestack_max = 16;
		511
		512	New(54,PL_savestack,96,ANY);
		513	PL_savestack_ix = 0;
		514	PL_savestack_max = 96;
		515
		516	New(54,PL_retstack,8,OP*);
		517	PL_retstack_ix = 0;
		518	PL_retstack_max = 8;
404	}	519	}
405		520
406	/*	521	/*
407	* destroy the stacks, the callchain etc...	522	* destroy the stacks, the callchain etc...
408	* still there is a memleak of 128 bytes...	523	* still there is a memleak of 128 bytes...
409	*/	524	*/
410	STATIC void	525	STATIC void
411	destroy_stacks(pTHX)	526	destroy_stacks(pTHX)
412	{	527	{
		528	if (!IN_DESTRUCT)
		529	{
413	/* is this ugly, I ask? */	530	/* is this ugly, I ask? */
414	while (PL_scopestack_ix)	531	while (PL_scopestack_ix)
415	LEAVE;	532	LEAVE;
416		533
417	/* sure it is, but more important: is it correct?? :/ */	534	/* sure it is, but more important: is it correct?? :/ */
418	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	535	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
419	FREETMPS;	536	FREETMPS;
		537	}
420		538
421	while (PL_curstackinfo->si_next)	539	while (PL_curstackinfo->si_next)
422	PL_curstackinfo = PL_curstackinfo->si_next;	540	PL_curstackinfo = PL_curstackinfo->si_next;
423		541
424	while (PL_curstackinfo)	542	while (PL_curstackinfo)
…		…
429	dSP;	547	dSP;
430	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
431	PUTBACK; /* possibly superfluous */	549	PUTBACK; /* possibly superfluous */
432	}	550	}
433		551
		552	if (!IN_DESTRUCT)
		553	{
434	dounwind(-1);	554	dounwind(-1);
435
436	SvREFCNT_dec(PL_curstackinfo->si_stack);	555	SvREFCNT_dec(PL_curstackinfo->si_stack);
		556	}
		557
437	Safefree(PL_curstackinfo->si_cxstack);	558	Safefree(PL_curstackinfo->si_cxstack);
438	Safefree(PL_curstackinfo);	559	Safefree(PL_curstackinfo);
439	PL_curstackinfo = p;	560	PL_curstackinfo = p;
440	}	561	}
441		562
…		…
444	Safefree(PL_scopestack);	565	Safefree(PL_scopestack);
445	Safefree(PL_savestack);	566	Safefree(PL_savestack);
446	Safefree(PL_retstack);	567	Safefree(PL_retstack);
447	}	568	}
448		569
		570	static void
		571	allocate_stack (Coro__State ctx, int alloc)
		572	{
		573	coro_stack *stack;
		574
		575	New (0, stack, 1, coro_stack);
		576
		577	stack->refcnt = 1;
		578	stack->usecnt = 1;
		579	stack->gencnt = ctx->gencnt = 0;
		580	if (alloc)
		581	{
		582	#if HAVE_MMAP
		583	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
		584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		585	if (stack->sptr == (void *)-1)
		586	#endif
		587	{
		588	/FIXME//D//* reasonable stack size! */
		589	stack->ssize = -4096 * sizeof (long);
		590	New (0, stack->sptr, 4096, long);
		591	}
		592	}
		593	else
		594	stack->sptr = 0;
		595
		596	ctx->stack = stack;
		597	}
		598
		599	static void
		600	deallocate_stack (Coro__State ctx)
		601	{
		602	coro_stack *stack = ctx->stack;
		603
		604	ctx->stack = 0;
		605
		606	if (stack)
		607	{
		608	if (!--stack->refcnt)
		609	{
		610	#ifdef HAVE_MMAP
		611	if (stack->ssize > 0 && stack->sptr)
		612	munmap (stack->sptr, stack->ssize);
		613	else
		614	#endif
		615	Safefree (stack->sptr);
		616
		617	Safefree (stack);
		618	}
		619	else if (ctx->gencnt == stack->gencnt)
		620	--stack->usecnt;
		621	}
		622	}
		623
		624	static void
		625	setup_coro (void *arg)
		626	{
		627	/*
		628	* emulate part of the perl startup here.
		629	*/
		630	dSP;
		631	Coro__State ctx = (Coro__State)arg;
		632	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		633
		634	coro_init_stacks (aTHX);
		635	/PL_curcop = 0;/
		636	/PL_in_eval = PL_in_eval;/ /* inherit */
		637	SvREFCNT_dec (GvAV (PL_defgv));
		638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
		639
		640	SPAGAIN;
		641
		642	if (ctx->stack)
		643	{
		644	ctx->cursp = 0;
		645
		646	PUSHMARK(SP);
		647	PUTBACK;
		648	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		649
		650	if (SvTRUE (ERRSV))
		651	croak (NULL);
		652	else
		653	croak ("FATAL: CCTXT coroutine returned!");
		654	}
		655	else
		656	{
		657	UNOP myop;
		658
		659	PL_op = (OP *)&myop;
		660
		661	Zero(&myop, 1, UNOP);
		662	myop.op_next = Nullop;
		663	myop.op_flags = OPf_WANT_VOID;
		664
		665	PUSHMARK(SP);
		666	XPUSHs (sub_init);
		667	/*
		668	* the next line is slightly wrong, as PL_op->op_next
		669	* is actually being executed so we skip the first op.
		670	* that doesn't matter, though, since it is only
		671	* pp_nextstate and we never return...
		672	* ah yes, and I don't care anyways ;)
		673	*/
		674	PUTBACK;
		675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		676	SPAGAIN;
		677
		678	ENTER; /* necessary e.g. for dounwind */
		679	}
		680	}
		681
		682	static void
		683	continue_coro (void *arg)
		684	{
		685	/*
		686	* this is a _very_ stripped down perl interpreter ;)
		687	*/
		688	Coro__State ctx = (Coro__State)arg;
		689	JMPENV coro_start_env;
		690
		691	PL_top_env = &ctx->start_env;
		692
		693	ctx->cursp = 0;
		694	PL_op = PL_op->op_next;
		695	CALLRUNOPS(aTHX);
		696
		697	abort ();
		698	}
		699
449	STATIC void	700	STATIC void
450	transfer(pTHX_ struct coro prev, struct coro next, int flags)	701	transfer(pTHX_ struct coro prev, struct coro next, int flags)
451	{	702	{
452	dSP;	703	dSTACKLEVEL;
		704	static struct coro *xnext;
453		705
454	if (prev != next)	706	if (prev != next)
455	{	707	{
456	/*	708	xnext = next;
457	* this could be done in newprocess which would lead to	709
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)	710	if (next->mainstack)
463	{	711	{
464	SAVE (prev, flags);	712	SAVE (prev, flags);
465	LOAD (next);	713	LOAD (next);
		714
466	/* mark this state as in-use */	715	/* mark this state as in-use */
467	next->mainstack = 0;	716	next->mainstack = 0;
468	next->tmps_ix = -2;	717	next->tmps_ix = -2;
		718
		719	/* stacklevel changed? if yes, grab the stack for us! */
		720	if (flags & TRANSFER_SAVE_CCTXT)
		721	{
		722	if (!prev->stack)
		723	allocate_stack (prev, 0);
		724	else if (prev->cursp != stacklevel
		725	&& prev->stack->usecnt > 1)
		726	{
		727	prev->gencnt = ++prev->stack->gencnt;
		728	prev->stack->usecnt = 1;
		729	}
		730
		731	/* has our stack been invalidated? */
		732	if (next->stack && next->stack->gencnt != next->gencnt)
		733	{
		734	deallocate_stack (next);
		735	allocate_stack (next, 1);
		736	coro_create (&(next->stack->cctx),
		737	continue_coro, (void *)next,
		738	next->stack->sptr, labs (next->stack->ssize));
		739	}
		740
		741	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		742	/* don't add any code here */
		743	}
		744
469	}	745	}
470	else if (next->tmps_ix == -2)	746	else if (next->tmps_ix == -2)
471	{
472	croak ("tried to transfer to running coroutine");	747	croak ("tried to transfer to running coroutine");
473	}
474	else	748	else
475	{	749	{
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 */	750	SAVE (prev, -1); /* first get rid of the old state */
482		751
483	init_stacks (); /* from perl.c */	752	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	*/	753	{
504	PUTBACK;	754	if (!prev->stack)
505	PL_op = pp_entersub(aTHX);	755	allocate_stack (prev, 0);
506	SPAGAIN;
507		756
508	ENTER; /* necessary e.g. for dounwind */	757	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		758	{
		759	PL_top_env = &next->start_env;
		760
		761	setup_coro (next);
		762
		763	prev->stack->refcnt++;
		764	prev->stack->usecnt++;
		765	next->stack = prev->stack;
		766	next->gencnt = prev->gencnt;
		767	}
		768	else
		769	{
		770	assert (!next->stack);
		771	allocate_stack (next, 1);
		772	coro_create (&(next->stack->cctx),
		773	setup_coro, (void *)next,
		774	next->stack->sptr, labs (next->stack->ssize));
		775	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		776	/* don't add any code here */
		777	}
		778	}
		779	else
		780	setup_coro (next);
509	}	781	}
		782
		783	/*
		784	* xnext is now either prev or next, depending on wether
		785	* we switched the c stack or not. that's why I use a global
		786	* variable, that should become thread-specific at one point.
		787	*/
		788	xnext->cursp = stacklevel;
510	}	789	}
		790
		791	if (coro_mortal)
		792	{
		793	SvREFCNT_dec (coro_mortal);
		794	coro_mortal = 0;
		795	}
		796	}
		797
		798	#define SV_CORO(sv,func) \
		799	do { \
		800	if (SvROK (sv)) \
		801	sv = SvRV (sv); \
		802	\
		803	if (SvTYPE(sv) == SVt_PVHV) \
		804	{ \
		805	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		806	\
		807	if (!he) \
		808	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		809	\
		810	(sv) = SvRV (HeVAL(he)); \
		811	} \
		812	\
		813	/* must also be changed inside Coro::Cont::yield */ \
		814	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		815	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		816	\
		817	} while(0)
		818
		819	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		820
		821	static void
		822	api_transfer(pTHX_ SV prev, SV next, int flags)
		823	{
		824	SV_CORO (prev, "Coro::transfer");
		825	SV_CORO (next, "Coro::transfer");
		826
		827	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		828	}
		829
		830	/ Coro ******************************************************************/
		831
		832	#define PRIO_MAX 3
		833	#define PRIO_HIGH 1
		834	#define PRIO_NORMAL 0
		835	#define PRIO_LOW -1
		836	#define PRIO_IDLE -3
		837	#define PRIO_MIN -4
		838
		839	/* for Coro.pm */
		840	static GV coro_current, coro_idle;
		841	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		842	static int coro_nready;
		843
		844	static void
		845	coro_enq (SV *sv)
		846	{
		847	if (SvTYPE (sv) == SVt_PVHV)
		848	{
		849	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		850	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		851
		852	prio = prio > PRIO_MAX ? PRIO_MAX
		853	: prio < PRIO_MIN ? PRIO_MIN
		854	: prio;
		855
		856	av_push (coro_ready [prio - PRIO_MIN], sv);
		857	coro_nready++;
		858
		859	return;
		860	}
		861
		862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		863	}
		864
		865	static SV *
		866	coro_deq (int min_prio)
		867	{
		868	int prio = PRIO_MAX - PRIO_MIN;
		869
		870	min_prio -= PRIO_MIN;
		871	if (min_prio < 0)
		872	min_prio = 0;
		873
		874	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		875	if (av_len (coro_ready[prio]) >= 0)
		876	{
		877	coro_nready--;
		878	return av_shift (coro_ready[prio]);
		879	}
		880
		881	return 0;
		882	}
		883
		884	static void
		885	api_ready (SV *coro)
		886	{
		887	if (SvROK (coro))
		888	coro = SvRV (coro);
		889
		890	coro_enq (SvREFCNT_inc (coro));
		891	}
		892
		893	static void
		894	api_schedule (void)
		895	{
		896	SV prev, next;
		897
		898	prev = SvRV (GvSV (coro_current));
		899	next = coro_deq (PRIO_MIN);
		900
		901	if (!next)
		902	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		903
		904	/* free this only after the transfer */
		905	coro_mortal = prev;
		906	SV_CORO (prev, "Coro::schedule");
		907
		908	SvRV (GvSV (coro_current)) = next;
		909
		910	SV_CORO (next, "Coro::schedule");
		911
		912	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		913	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		914	}
		915
		916	static void
		917	api_cede (void)
		918	{
		919	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		920
		921	api_schedule ();
511	}	922	}
512		923
513	MODULE = Coro::State PACKAGE = Coro::State	924	MODULE = Coro::State PACKAGE = Coro::State
514		925
515	PROTOTYPES: ENABLE	926	PROTOTYPES: ENABLE
516		927
517	BOOT:	928	BOOT:
518	{ /* {} necessary for stoopid perl-5.6.x */	929	{ /* {} necessary for stoopid perl-5.6.x */
		930	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		931	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
519	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	932	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
520		933
521	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	934	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
522	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	935	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
523	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	936	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		937	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
524		938
525	if (!padlist_cache)	939	if (!padlist_cache)
526	padlist_cache = newHV ();	940	padlist_cache = newHV ();
		941
		942	main_mainstack = PL_mainstack;
		943
		944	coroapi.ver = CORO_API_VERSION;
		945	coroapi.transfer = api_transfer;
527	}	946	}
528		947
529	Coro::State	948	Coro::State
530	_newprocess(args)	949	_newprocess(args)
531	SV * args	950	SV * args
…		…
534	Coro__State coro;	953	Coro__State coro;
535		954
536	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	955	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
537	croak ("Coro::State::_newprocess expects an arrayref");	956	croak ("Coro::State::_newprocess expects an arrayref");
538		957
539	New (0, coro, 1, struct coro);	958	Newz (0, coro, 1, struct coro);
540		959
		960	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
541	coro->mainstack = 0; /* actual work is done inside transfer */	961	coro->mainstack = 0; /* actual work is done inside transfer */
542	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	962	coro->stack = 0;
		963
		964	/* same as JMPENV_BOOTSTRAP */
		965	/* we might be able to recycle start_env, but safe is safe */
		966	//Zero(&coro->start_env, 1, JMPENV);
		967	coro->start_env.je_ret = -1;
		968	coro->start_env.je_mustcatch = TRUE;
543		969
544	RETVAL = coro;	970	RETVAL = coro;
545	OUTPUT:	971	OUTPUT:
546	RETVAL	972	RETVAL
547		973
548	void	974	void
549	transfer(prev, next, flags = SAVE_ALL)	975	transfer(prev, next, flags)
550	Coro::State_or_hashref prev	976	SV *prev
551	Coro::State_or_hashref next	977	SV *next
552	int flags	978	int flags
553	PROTOTYPE: @	979	PROTOTYPE: @
554	CODE:	980	CODE:
555		981	PUTBACK;
		982	SV_CORO (next, "Coro::transfer");
		983	SV_CORO (prev, "Coro::transfer");
556	transfer (aTHX_ prev, next, flags);	984	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		985	SPAGAIN;
557		986
558	void	987	void
559	DESTROY(coro)	988	DESTROY(coro)
560	Coro::State coro	989	Coro::State coro
561	CODE:	990	CODE:
562		991
563	if (coro->mainstack)	992	if (coro->mainstack && coro->mainstack != main_mainstack)
564	{	993	{
565	struct coro temp;	994	struct coro temp;
566		995
		996	PUTBACK;
567	SAVE(aTHX_ (&temp), SAVE_ALL);	997	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
568	LOAD(aTHX_ coro);	998	LOAD(aTHX_ coro);
		999	SPAGAIN;
569		1000
570	destroy_stacks ();	1001	destroy_stacks (aTHX);
571		1002
572	LOAD((&temp)); /* this will get rid of defsv etc.. */	1003	LOAD((&temp)); /* this will get rid of defsv etc.. */
		1004	SPAGAIN;
		1005
		1006	coro->mainstack = 0;
573	}	1007	}
574		1008
		1009	deallocate_stack (coro);
		1010	SvREFCNT_dec (coro->args);
575	Safefree (coro);	1011	Safefree (coro);
576		1012
577	void	1013	void
578	flush()	1014	flush()
579	CODE:	1015	CODE:
580	#ifdef MAY_FLUSH	1016	#ifdef MAY_FLUSH
581	flush_padlist_cache ();	1017	flush_padlist_cache ();
582	#endif	1018	#endif
583		1019
		1020	void
		1021	_exit(code)
		1022	int code
		1023	PROTOTYPE: $
		1024	CODE:
		1025	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		1026	_exit (code);
		1027	#else
		1028	signal (SIGTERM, SIG_DFL);
		1029	raise (SIGTERM);
		1030	exit (code);
		1031	#endif
		1032
584	MODULE = Coro::State PACKAGE = Coro::Cont	1033	MODULE = Coro::State PACKAGE = Coro::Cont
585		1034
586	# this is dirty (do you hear me?) and should be in it's own .xs	1035	# this is slightly dirty (should expose a c-level api)
587		1036
588	void	1037	void
589	result(...)	1038	yield(...)
590	PROTOTYPE: @	1039	PROTOTYPE: @
591	CODE:	1040	CODE:
592	static SV *returnstk;	1041	static SV *returnstk;
593	SV *sv;	1042	SV *sv;
594	AV *defav = GvAV (PL_defgv);	1043	AV *defav = GvAV (PL_defgv);
595	struct coro prev, next;	1044	struct coro prev, next;
596		1045
597	if (!returnstk)	1046	if (!returnstk)
598	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1047	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
599		1048
600	/* set up @_ -- ugly */	1049	/* set up @_ -- ugly */
601	av_clear (defav);	1050	av_clear (defav);
602	av_fill (defav, items - 1);	1051	av_fill (defav, items - 1);
603	while (items--)	1052	while (items--)
…		…
606	mg_get (returnstk); /* isn't documentation wrong for mg_get? */	1055	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
607	sv = av_pop ((AV *)SvRV (returnstk));	1056	sv = av_pop ((AV *)SvRV (returnstk));
608	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));	1057	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)));	1058	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
610	SvREFCNT_dec (sv);	1059	SvREFCNT_dec (sv);
		1060
611	transfer(prev, next, 0);	1061	transfer(aTHX_ prev, next, 0);
612		1062
		1063	MODULE = Coro::State PACKAGE = Coro
		1064
		1065	# this is slightly dirty (should expose a c-level api)
		1066
		1067	BOOT:
		1068	{
		1069	int i;
		1070	HV *stash = gv_stashpv ("Coro", TRUE);
		1071
		1072	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1073	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1074	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1075	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1076	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1077	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1078
		1079	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1080	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1081
		1082	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1083	coro_ready[i] = newAV ();
		1084
		1085	{
		1086	SV *sv = perl_get_sv("Coro::API", 1);
		1087
		1088	coroapi.schedule = api_schedule;
		1089	coroapi.cede = api_cede;
		1090	coroapi.ready = api_ready;
		1091	coroapi.nready = &coro_nready;
		1092	coroapi.current = coro_current;
		1093
		1094	GCoroAPI = &coroapi;
		1095	sv_setiv(sv, (IV)&coroapi);
		1096	SvREADONLY_on(sv);
		1097	}
		1098	}
		1099
		1100	void
		1101	ready(self)
		1102	SV * self
		1103	PROTOTYPE: $
		1104	CODE:
		1105	api_ready (self);
		1106
		1107	int
		1108	nready(...)
		1109	PROTOTYPE:
		1110	CODE:
		1111	RETVAL = coro_nready;
		1112	OUTPUT:
		1113	RETVAL
		1114
		1115	void
		1116	schedule(...)
		1117	PROTOTYPE:
		1118	CODE:
		1119	api_schedule ();
		1120
		1121	void
		1122	cede(...)
		1123	PROTOTYPE:
		1124	CODE:
		1125	api_cede ();
		1126

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Comparing Coro/Coro/State.xs (file contents): Revision 1.11 by root, Sat Jul 21 18:21:45 2001 UTC vs. Revision 1.47 by pcg, Sat Nov 15 03:53:10 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 1.47 by pcg, Sat Nov 15 03:53:10 2003 UTC