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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.8 by root, Thu Jul 19 04:13:22 2001 UTC vs.
Revision 1.49 by pcg, Sun Nov 23 03:34:13 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::_newcoro"	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	{
…		…
115	sv = (SV *) newAV ();	184	sv = (SV *) newAV ();
116	else if (*name == '%')	185	else if (*name == '%')
117	sv = (SV *) newHV ();	186	sv = (SV *) newHV ();
118	else	187	else
119	sv = NEWSV (0, 0);	188	sv = NEWSV (0, 0);
		189	#ifdef SvPADBUSY
120	if (!SvPADBUSY (sv))	190	if (!SvPADBUSY (sv))
		191	#endif
121	SvPADMY_on (sv);	192	SvPADMY_on (sv);
122	npad[ix] = sv;	193	npad[ix] = sv;
123	}	194	}
124	}	195	}
125	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	196	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
…		…
156		227
157	return newpadlist;	228	return newpadlist;
158	}	229	}
159		230
160	#ifdef MAY_FLUSH	231	#ifdef MAY_FLUSH
161	STATIC AV *	232	STATIC void
162	free_padlist (AV *padlist)	233	free_padlist (AV *padlist)
163	{	234	{
164	/* may be during global destruction */	235	/* may be during global destruction */
165	if (SvREFCNT(padlist))	236	if (SvREFCNT(padlist))
166	{	237	{
…		…
231	#endif	302	#endif
232		303
233	#define SB do {	304	#define SB do {
234	#define SE } while (0)	305	#define SE } while (0)
235		306
236	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	307	#define LOAD(state) load_state(aTHX_ (state));
237	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	308	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
238		309
239	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
240		311
241	static void	312	static void
242	load_state(pTHX_ Coro__State c)	313	load_state(pTHX_ Coro__State c)
243	{	314	{
244	PL_dowarn = c->dowarn;	315	PL_dowarn = c->dowarn;
		316	PL_in_eval = c->in_eval;
245		317
246	PL_curstackinfo = c->curstackinfo;	318	PL_curstackinfo = c->curstackinfo;
247	PL_curstack = c->curstack;	319	PL_curstack = c->curstack;
248	PL_mainstack = c->mainstack;	320	PL_mainstack = c->mainstack;
249	PL_stack_sp = c->stack_sp;	321	PL_stack_sp = c->stack_sp;
250	PL_op = c->op;	322	PL_op = c->op;
251	PL_curpad = c->curpad;	323	PL_curpad = c->curpad;
		324	PL_comppad = c->comppad;
252	PL_stack_base = c->stack_base;	325	PL_stack_base = c->stack_base;
253	PL_stack_max = c->stack_max;	326	PL_stack_max = c->stack_max;
254	PL_tmps_stack = c->tmps_stack;	327	PL_tmps_stack = c->tmps_stack;
255	PL_tmps_floor = c->tmps_floor;	328	PL_tmps_floor = c->tmps_floor;
256	PL_tmps_ix = c->tmps_ix;	329	PL_tmps_ix = c->tmps_ix;
…		…
266	PL_savestack_max = c->savestack_max;	339	PL_savestack_max = c->savestack_max;
267	PL_retstack = c->retstack;	340	PL_retstack = c->retstack;
268	PL_retstack_ix = c->retstack_ix;	341	PL_retstack_ix = c->retstack_ix;
269	PL_retstack_max = c->retstack_max;	342	PL_retstack_max = c->retstack_max;
270	PL_curcop = c->curcop;	343	PL_curcop = c->curcop;
		344	PL_top_env = c->top_env;
271		345
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	346	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	347	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	348	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275		349
…		…
302	save_state(pTHX_ Coro__State c, int flags)	376	save_state(pTHX_ Coro__State c, int flags)
303	{	377	{
304	{	378	{
305	dSP;	379	dSP;
306	I32 cxix = cxstack_ix;	380	I32 cxix = cxstack_ix;
		381	PERL_CONTEXT *ccstk = cxstack;
307	PERL_SI *top_si = PL_curstackinfo;	382	PERL_SI *top_si = PL_curstackinfo;
308	PERL_CONTEXT *ccstk = cxstack;
309		383
310	/*	384	/*
311	* the worst thing you can imagine happens first - we have to save	385	* the worst thing you can imagine happens first - we have to save
312	* (and reinitialize) all cv's in the whole callchain :(	386	* (and reinitialize) all cv's in the whole callchain :(
313	*/	387	*/
314		388
315	PUSHs (Nullsv);	389	PUSHs (Nullsv);
316	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
317	for (;;)	391	for (;;)
318	{	392	{
319	do	393	while (cxix >= 0)
320	{	394	{
321	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
322		396
323	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE(cx) == CXt_SUB)
324	{	398	{
…		…
343	PUSHs ((SV *)cv);	417	PUSHs ((SV *)cv);
344		418
345	get_padlist (cv); /* this is a monster */	419	get_padlist (cv); /* this is a monster */
346	}	420	}
347	}	421	}
		422	#ifdef CXt_FORMAT
348	else if (CxTYPE(cx) == CXt_FORMAT)	423	else if (CxTYPE(cx) == CXt_FORMAT)
349	{	424	{
350	/* I never used formats, so how should I know how these are implemented? */	425	/* I never used formats, so how should I know how these are implemented? */
351	/* my bold guess is as a simple, plain sub... */	426	/* my bold guess is as a simple, plain sub... */
352	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	427	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
353	}	428	}
		429	#endif
354	}	430	}
355	while (cxix >= 0);
356		431
357	if (top_si->si_type == PERLSI_MAIN)	432	if (top_si->si_type == PERLSI_MAIN)
358	break;	433	break;
359		434
360	top_si = top_si->si_prev;	435	top_si = top_si->si_prev;
…		…
363	}	438	}
364		439
365	PUTBACK;	440	PUTBACK;
366	}	441	}
367		442
368	c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	443	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
369	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	444	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
370	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	445	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
371		446
372	c->dowarn = PL_dowarn;	447	c->dowarn = PL_dowarn;
		448	c->in_eval = PL_in_eval;
373		449
374	c->curstackinfo = PL_curstackinfo;	450	c->curstackinfo = PL_curstackinfo;
375	c->curstack = PL_curstack;	451	c->curstack = PL_curstack;
376	c->mainstack = PL_mainstack;	452	c->mainstack = PL_mainstack;
377	c->stack_sp = PL_stack_sp;	453	c->stack_sp = PL_stack_sp;
378	c->op = PL_op;	454	c->op = PL_op;
379	c->curpad = PL_curpad;	455	c->curpad = PL_curpad;
		456	c->comppad = PL_comppad;
380	c->stack_base = PL_stack_base;	457	c->stack_base = PL_stack_base;
381	c->stack_max = PL_stack_max;	458	c->stack_max = PL_stack_max;
382	c->tmps_stack = PL_tmps_stack;	459	c->tmps_stack = PL_tmps_stack;
383	c->tmps_floor = PL_tmps_floor;	460	c->tmps_floor = PL_tmps_floor;
384	c->tmps_ix = PL_tmps_ix;	461	c->tmps_ix = PL_tmps_ix;
…		…
394	c->savestack_max = PL_savestack_max;	471	c->savestack_max = PL_savestack_max;
395	c->retstack = PL_retstack;	472	c->retstack = PL_retstack;
396	c->retstack_ix = PL_retstack_ix;	473	c->retstack_ix = PL_retstack_ix;
397	c->retstack_max = PL_retstack_max;	474	c->retstack_max = PL_retstack_max;
398	c->curcop = PL_curcop;	475	c->curcop = PL_curcop;
		476	c->top_env = PL_top_env;
		477	}
		478
		479	/*
		480	* allocate various perl stacks. This is an exact copy
		481	* of perl.c:init_stacks, except that it uses less memory
		482	* on the assumption that coroutines do not usually need
		483	* a lot of stackspace.
		484	*/
		485	STATIC void
		486	coro_init_stacks (pTHX)
		487	{
		488	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		489	PL_curstackinfo->si_type = PERLSI_MAIN;
		490	PL_curstack = PL_curstackinfo->si_stack;
		491	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		492
		493	PL_stack_base = AvARRAY(PL_curstack);
		494	PL_stack_sp = PL_stack_base;
		495	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		496
		497	New(50,PL_tmps_stack,96,SV*);
		498	PL_tmps_floor = -1;
		499	PL_tmps_ix = -1;
		500	PL_tmps_max = 96;
		501
		502	New(54,PL_markstack,16,I32);
		503	PL_markstack_ptr = PL_markstack;
		504	PL_markstack_max = PL_markstack + 16;
		505
		506	#ifdef SET_MARK_OFFSET
		507	SET_MARK_OFFSET;
		508	#endif
		509
		510	New(54,PL_scopestack,16,I32);
		511	PL_scopestack_ix = 0;
		512	PL_scopestack_max = 16;
		513
		514	New(54,PL_savestack,96,ANY);
		515	PL_savestack_ix = 0;
		516	PL_savestack_max = 96;
		517
		518	New(54,PL_retstack,8,OP*);
		519	PL_retstack_ix = 0;
		520	PL_retstack_max = 8;
399	}	521	}
400		522
401	/*	523	/*
402	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
403	* still there is a memleak of 128 bytes...
404	*/	525	*/
405	STATIC void	526	STATIC void
406	destroy_stacks(pTHX)	527	destroy_stacks(pTHX)
407	{	528	{
		529	if (!IN_DESTRUCT)
		530	{
408	/* is this ugly, I ask? */	531	/* is this ugly, I ask? */
409	while (PL_scopestack_ix)	532	while (PL_scopestack_ix)
410	LEAVE;	533	LEAVE;
411		534
412	/* sure it is, but more important: is it correct?? :/ */	535	/* sure it is, but more important: is it correct?? :/ */
413	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	536	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
414	FREETMPS;	537	FREETMPS;
		538	}
415		539
416	while (PL_curstackinfo->si_next)	540	while (PL_curstackinfo->si_next)
417	PL_curstackinfo = PL_curstackinfo->si_next;	541	PL_curstackinfo = PL_curstackinfo->si_next;
418		542
419	while (PL_curstackinfo)	543	while (PL_curstackinfo)
…		…
424	dSP;	548	dSP;
425	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	549	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
426	PUTBACK; /* possibly superfluous */	550	PUTBACK; /* possibly superfluous */
427	}	551	}
428		552
		553	if (!IN_DESTRUCT)
		554	{
429	dounwind(-1);	555	dounwind(-1);
430
431	SvREFCNT_dec(PL_curstackinfo->si_stack);	556	SvREFCNT_dec(PL_curstackinfo->si_stack);
		557	}
		558
432	Safefree(PL_curstackinfo->si_cxstack);	559	Safefree(PL_curstackinfo->si_cxstack);
433	Safefree(PL_curstackinfo);	560	Safefree(PL_curstackinfo);
434	PL_curstackinfo = p;	561	PL_curstackinfo = p;
435	}	562	}
436		563
…		…
439	Safefree(PL_scopestack);	566	Safefree(PL_scopestack);
440	Safefree(PL_savestack);	567	Safefree(PL_savestack);
441	Safefree(PL_retstack);	568	Safefree(PL_retstack);
442	}	569	}
443		570
		571	static void
		572	allocate_stack (Coro__State ctx, int alloc)
		573	{
		574	coro_stack *stack;
		575
		576	New (0, stack, 1, coro_stack);
		577
		578	stack->refcnt = 1;
		579	stack->usecnt = 1;
		580	stack->gencnt = ctx->gencnt = 0;
		581	if (alloc)
		582	{
		583	#if HAVE_MMAP
		584	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
		585	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		586	if (stack->sptr == (void *)-1)
		587	#endif
		588	{
		589	/FIXME//D//* reasonable stack size! */
		590	stack->ssize = -4096 * sizeof (long);
		591	New (0, stack->sptr, 4096, long);
		592	}
		593	}
		594	else
		595	stack->sptr = 0;
		596
		597	ctx->stack = stack;
		598	}
		599
		600	static void
		601	deallocate_stack (Coro__State ctx)
		602	{
		603	coro_stack *stack = ctx->stack;
		604
		605	ctx->stack = 0;
		606
		607	if (stack)
		608	{
		609	if (!--stack->refcnt)
		610	{
		611	#ifdef HAVE_MMAP
		612	if (stack->ssize > 0 && stack->sptr)
		613	munmap (stack->sptr, stack->ssize);
		614	else
		615	#endif
		616	Safefree (stack->sptr);
		617
		618	Safefree (stack);
		619	}
		620	else if (ctx->gencnt == stack->gencnt)
		621	--stack->usecnt;
		622	}
		623	}
		624
		625	static void
		626	setup_coro (void *arg)
		627	{
		628	/*
		629	* emulate part of the perl startup here.
		630	*/
		631	dSP;
		632	Coro__State ctx = (Coro__State)arg;
		633	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		634
		635	coro_init_stacks (aTHX);
		636	/PL_curcop = 0;/
		637	/PL_in_eval = PL_in_eval;/ /* inherit */
		638	SvREFCNT_dec (GvAV (PL_defgv));
		639	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
		640
		641	SPAGAIN;
		642
		643	if (ctx->stack)
		644	{
		645	ctx->cursp = 0;
		646
		647	PUSHMARK(SP);
		648	PUTBACK;
		649	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		650
		651	if (SvTRUE (ERRSV))
		652	croak (NULL);
		653	else
		654	croak ("FATAL: CCTXT coroutine returned!");
		655	}
		656	else
		657	{
		658	UNOP myop;
		659
		660	PL_op = (OP *)&myop;
		661
		662	Zero(&myop, 1, UNOP);
		663	myop.op_next = Nullop;
		664	myop.op_flags = OPf_WANT_VOID;
		665
		666	PUSHMARK(SP);
		667	XPUSHs (sub_init);
		668	/*
		669	* the next line is slightly wrong, as PL_op->op_next
		670	* is actually being executed so we skip the first op.
		671	* that doesn't matter, though, since it is only
		672	* pp_nextstate and we never return...
		673	* ah yes, and I don't care anyways ;)
		674	*/
		675	PUTBACK;
		676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		677	SPAGAIN;
		678
		679	ENTER; /* necessary e.g. for dounwind */
		680	}
		681	}
		682
		683	static void
		684	continue_coro (void *arg)
		685	{
		686	/*
		687	* this is a _very_ stripped down perl interpreter ;)
		688	*/
		689	Coro__State ctx = (Coro__State)arg;
		690	JMPENV coro_start_env;
		691
		692	PL_top_env = &ctx->start_env;
		693
		694	ctx->cursp = 0;
		695	PL_op = PL_op->op_next;
		696	CALLRUNOPS(aTHX);
		697
		698	abort ();
		699	}
		700
444	STATIC void	701	STATIC void
445	transfer(pTHX_ struct coro prev, struct coro next, int flags)	702	transfer(pTHX_ struct coro prev, struct coro next, int flags)
446	{	703	{
447	dSP;	704	dSTACKLEVEL;
		705	static struct coro *xnext;
448		706
449	if (prev != next)	707	if (prev != next)
450	{	708	{
451	/*	709	xnext = next;
452	* this could be done in newprocess which would lead to	710
453	* extremely elegant and fast (just SAVE/LOAD)
454	* code here, but lazy allocation of stacks has also
455	* some virtues and the overhead of the if() is nil.
456	*/
457	if (next->mainstack)	711	if (next->mainstack)
458	{	712	{
459	SAVE (prev, flags);	713	SAVE (prev, flags);
460	LOAD (next);	714	LOAD (next);
		715
461	/* mark this state as in-use */	716	/* mark this state as in-use */
462	next->mainstack = 0;	717	next->mainstack = 0;
463	next->tmps_ix = -2;	718	next->tmps_ix = -2;
		719
		720	/* stacklevel changed? if yes, grab the stack for us! */
		721	if (flags & TRANSFER_SAVE_CCTXT)
		722	{
		723	if (!prev->stack)
		724	allocate_stack (prev, 0);
		725	else if (prev->cursp != stacklevel
		726	&& prev->stack->usecnt > 1)
		727	{
		728	prev->gencnt = ++prev->stack->gencnt;
		729	prev->stack->usecnt = 1;
		730	}
		731
		732	/* has our stack been invalidated? */
		733	if (next->stack && next->stack->gencnt != next->gencnt)
		734	{
		735	deallocate_stack (next);
		736	allocate_stack (next, 1);
		737	coro_create (&(next->stack->cctx),
		738	continue_coro, (void *)next,
		739	next->stack->sptr, labs (next->stack->ssize));
		740	}
		741
		742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		743	/* don't add any code here */
		744	}
		745
464	}	746	}
465	else if (next->tmps_ix == -2)	747	else if (next->tmps_ix == -2)
466	{
467	croak ("tried to transfer to running coroutine");	748	croak ("tried to transfer to running coroutine");
468	}
469	else	749	else
470	{	750	{
471	/*
472	* emulate part of the perl startup here.
473	*/
474	UNOP myop;
475
476	SAVE (prev, -1); /* first get rid of the old state */	751	SAVE (prev, -1); /* first get rid of the old state */
477		752
478	init_stacks (); /* from perl.c */	753	if (flags & TRANSFER_SAVE_CCTXT)
479	SPAGAIN;
480
481	PL_op = (OP *)&myop;
482	/PL_curcop = 0;/
483	SvREFCNT_dec (GvAV (PL_defgv));
484	GvAV (PL_defgv) = next->args;
485
486	Zero(&myop, 1, UNOP);
487	myop.op_next = Nullop;
488	myop.op_flags = OPf_WANT_VOID;
489
490	PUSHMARK(SP);
491	XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
492	/*
493	* the next line is slightly wrong, as PL_op->op_next
494	* is actually being executed so we skip the first op.
495	* that doesn't matter, though, since it is only
496	* pp_nextstate and we never return...
497	* ah yes, and I don't care anyways ;)
498	*/	754	{
499	PUTBACK;	755	if (!prev->stack)
500	PL_op = pp_entersub(aTHX);	756	allocate_stack (prev, 0);
501	SPAGAIN;
502		757
503	ENTER; /* necessary e.g. for dounwind */	758	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		759	{
		760	PL_top_env = &next->start_env;
		761
		762	setup_coro (next);
		763
		764	prev->stack->refcnt++;
		765	prev->stack->usecnt++;
		766	next->stack = prev->stack;
		767	next->gencnt = prev->gencnt;
		768	}
		769	else
		770	{
		771	assert (!next->stack);
		772	allocate_stack (next, 1);
		773	coro_create (&(next->stack->cctx),
		774	setup_coro, (void *)next,
		775	next->stack->sptr, labs (next->stack->ssize));
		776	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		777	/* don't add any code here */
		778	}
		779	}
		780	else
		781	setup_coro (next);
504	}	782	}
		783
		784	/*
		785	* xnext is now either prev or next, depending on wether
		786	* we switched the c stack or not. that's why I use a global
		787	* variable, that should become thread-specific at one point.
		788	*/
		789	xnext->cursp = stacklevel;
505	}	790	}
		791
		792	if (coro_mortal)
		793	{
		794	SvREFCNT_dec (coro_mortal);
		795	coro_mortal = 0;
		796	}
		797	}
		798
		799	#define SV_CORO(sv,func) \
		800	do { \
		801	if (SvROK (sv)) \
		802	sv = SvRV (sv); \
		803	\
		804	if (SvTYPE(sv) == SVt_PVHV) \
		805	{ \
		806	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		807	\
		808	if (!he) \
		809	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		810	\
		811	(sv) = SvRV (HeVAL(he)); \
		812	} \
		813	\
		814	/* must also be changed inside Coro::Cont::yield */ \
		815	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		816	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		817	\
		818	} while(0)
		819
		820	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		821
		822	static void
		823	api_transfer(pTHX_ SV prev, SV next, int flags)
		824	{
		825	SV_CORO (prev, "Coro::transfer");
		826	SV_CORO (next, "Coro::transfer");
		827
		828	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		829	}
		830
		831	/ Coro ******************************************************************/
		832
		833	#define PRIO_MAX 3
		834	#define PRIO_HIGH 1
		835	#define PRIO_NORMAL 0
		836	#define PRIO_LOW -1
		837	#define PRIO_IDLE -3
		838	#define PRIO_MIN -4
		839
		840	/* for Coro.pm */
		841	static GV coro_current, coro_idle;
		842	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		843	static int coro_nready;
		844
		845	static void
		846	coro_enq (SV *sv)
		847	{
		848	if (SvTYPE (sv) == SVt_PVHV)
		849	{
		850	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		851	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		852
		853	prio = prio > PRIO_MAX ? PRIO_MAX
		854	: prio < PRIO_MIN ? PRIO_MIN
		855	: prio;
		856
		857	av_push (coro_ready [prio - PRIO_MIN], sv);
		858	coro_nready++;
		859
		860	return;
		861	}
		862
		863	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		864	}
		865
		866	static SV *
		867	coro_deq (int min_prio)
		868	{
		869	int prio = PRIO_MAX - PRIO_MIN;
		870
		871	min_prio -= PRIO_MIN;
		872	if (min_prio < 0)
		873	min_prio = 0;
		874
		875	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		876	if (av_len (coro_ready[prio]) >= 0)
		877	{
		878	coro_nready--;
		879	return av_shift (coro_ready[prio]);
		880	}
		881
		882	return 0;
		883	}
		884
		885	static void
		886	api_ready (SV *coro)
		887	{
		888	if (SvROK (coro))
		889	coro = SvRV (coro);
		890
		891	coro_enq (SvREFCNT_inc (coro));
		892	}
		893
		894	static void
		895	api_schedule (void)
		896	{
		897	SV prev, next;
		898
		899	prev = SvRV (GvSV (coro_current));
		900	next = coro_deq (PRIO_MIN);
		901
		902	if (!next)
		903	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		904
		905	/* free this only after the transfer */
		906	coro_mortal = prev;
		907	SV_CORO (prev, "Coro::schedule");
		908
		909	SvRV (GvSV (coro_current)) = next;
		910
		911	SV_CORO (next, "Coro::schedule");
		912
		913	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		914	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		915	}
		916
		917	static void
		918	api_cede (void)
		919	{
		920	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		921
		922	api_schedule ();
506	}	923	}
507		924
508	MODULE = Coro::State PACKAGE = Coro::State	925	MODULE = Coro::State PACKAGE = Coro::State
509		926
510	PROTOTYPES: ENABLE	927	PROTOTYPES: ENABLE
511		928
512	BOOT:	929	BOOT:
		930	{ /* {} necessary for stoopid perl-5.6.x */
		931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
513	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
514		934
515	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
516	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
517	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
518		939
519	if (!padlist_cache)	940	if (!padlist_cache)
520	padlist_cache = newHV ();	941	padlist_cache = newHV ();
		942
		943	main_mainstack = PL_mainstack;
		944
		945	coroapi.ver = CORO_API_VERSION;
		946	coroapi.transfer = api_transfer;
		947	}
521		948
522	Coro::State	949	Coro::State
523	_newprocess(args)	950	_newprocess(args)
524	SV * args	951	SV * args
525	PROTOTYPE: $	952	PROTOTYPE: $
…		…
527	Coro__State coro;	954	Coro__State coro;
528		955
529	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	956	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
530	croak ("Coro::State::_newprocess expects an arrayref");	957	croak ("Coro::State::_newprocess expects an arrayref");
531		958
532	New (0, coro, 1, struct coro);	959	Newz (0, coro, 1, struct coro);
533		960
		961	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
534	coro->mainstack = 0; /* actual work is done inside transfer */	962	coro->mainstack = 0; /* actual work is done inside transfer */
535	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	963	coro->stack = 0;
		964
		965	/* same as JMPENV_BOOTSTRAP */
		966	/* we might be able to recycle start_env, but safe is safe */
		967	//Zero(&coro->start_env, 1, JMPENV);
		968	coro->start_env.je_ret = -1;
		969	coro->start_env.je_mustcatch = TRUE;
536		970
537	RETVAL = coro;	971	RETVAL = coro;
538	OUTPUT:	972	OUTPUT:
539	RETVAL	973	RETVAL
540		974
541	void	975	void
542	transfer(prev, next, flags = SAVE_DEFAV)	976	transfer(prev, next, flags)
543	Coro::State_or_hashref prev	977	SV *prev
544	Coro::State_or_hashref next	978	SV *next
545	int flags	979	int flags
546	PROTOTYPE: @	980	PROTOTYPE: @
547	CODE:	981	CODE:
548		982	PUTBACK;
		983	SV_CORO (next, "Coro::transfer");
		984	SV_CORO (prev, "Coro::transfer");
549	transfer (aTHX_ prev, next, flags);	985	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		986	SPAGAIN;
550		987
551	void	988	void
552	DESTROY(coro)	989	DESTROY(coro)
553	Coro::State coro	990	Coro::State coro
554	CODE:	991	CODE:
555		992
556	if (coro->mainstack)	993	if (coro->mainstack && coro->mainstack != main_mainstack)
557	{	994	{
558	struct coro temp;	995	struct coro temp;
559		996
		997	PUTBACK;
560	SAVE(aTHX_ (&temp), SAVE_ALL);	998	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
561	LOAD(aTHX_ coro);	999	LOAD(aTHX_ coro);
		1000	SPAGAIN;
562		1001
563	destroy_stacks ();	1002	destroy_stacks (aTHX);
564		1003
565	LOAD((&temp)); /* this will get rid of defsv etc.. */	1004	LOAD((&temp)); /* this will get rid of defsv etc.. */
		1005	SPAGAIN;
		1006
		1007	coro->mainstack = 0;
566	}	1008	}
567		1009
		1010	deallocate_stack (coro);
		1011	SvREFCNT_dec (coro->args);
568	Safefree (coro);	1012	Safefree (coro);
569		1013
570	void	1014	void
571	flush()	1015	flush()
572	CODE:	1016	CODE:
573	#ifdef MAY_FLUSH	1017	#ifdef MAY_FLUSH
574	flush_padlist_cache ();	1018	flush_padlist_cache ();
575	#endif	1019	#endif
576		1020
		1021	void
		1022	_exit(code)
		1023	int code
		1024	PROTOTYPE: $
		1025	CODE:
		1026	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		1027	_exit (code);
		1028	#else
		1029	signal (SIGTERM, SIG_DFL);
		1030	raise (SIGTERM);
		1031	exit (code);
		1032	#endif
		1033
577	MODULE = Coro::State PACKAGE = Coro::Cont	1034	MODULE = Coro::State PACKAGE = Coro::Cont
578		1035
579	# this is dirty and should be in it's own .xs	1036	# this is slightly dirty (should expose a c-level api)
580		1037
581	void	1038	void
582	result(...)	1039	yield(...)
583	PROTOTYPE: @	1040	PROTOTYPE: @
584	CODE:	1041	CODE:
585	static SV *returnstk;	1042	static SV *returnstk;
586	SV *sv;	1043	SV *sv;
587	AV *defav = GvAV (PL_defgv);	1044	AV *defav = GvAV (PL_defgv);
588	struct coro prev, next;	1045	struct coro prev, next;
589		1046
590	if (!returnstk)	1047	if (!returnstk)
591	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1048	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
592		1049
593	/* set up @_ */	1050	/* set up @_ -- ugly */
594	av_clear (defav);	1051	av_clear (defav);
595	av_fill (defav, items - 1);	1052	av_fill (defav, items - 1);
596	while (items--)	1053	while (items--)
597	av_store (defav, items, SvREFCNT_inc (ST(items)));	1054	av_store (defav, items, SvREFCNT_inc (ST(items)));
598		1055
599	mg_get (returnstk); /* isn't documentation wrong for mg_get? */	1056	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
600	sv = av_pop ((AV *)SvRV (returnstk));	1057	sv = av_pop ((AV *)SvRV (returnstk));
601	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));	1058	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
602	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1059	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
603	SvREFCNT_dec (sv);	1060	SvREFCNT_dec (sv);
		1061
604	transfer(prev, next, 0);	1062	transfer(aTHX_ prev, next, 0);
605		1063
		1064	MODULE = Coro::State PACKAGE = Coro
		1065
		1066	# this is slightly dirty (should expose a c-level api)
		1067
		1068	BOOT:
		1069	{
		1070	int i;
		1071	HV *stash = gv_stashpv ("Coro", TRUE);
		1072
		1073	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1074	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1075	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1076	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1077	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1078	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1079
		1080	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1081	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1082
		1083	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1084	coro_ready[i] = newAV ();
		1085
		1086	{
		1087	SV *sv = perl_get_sv("Coro::API", 1);
		1088
		1089	coroapi.schedule = api_schedule;
		1090	coroapi.cede = api_cede;
		1091	coroapi.ready = api_ready;
		1092	coroapi.nready = &coro_nready;
		1093	coroapi.current = coro_current;
		1094
		1095	GCoroAPI = &coroapi;
		1096	sv_setiv(sv, (IV)&coroapi);
		1097	SvREADONLY_on(sv);
		1098	}
		1099	}
		1100
		1101	void
		1102	ready(self)
		1103	SV * self
		1104	PROTOTYPE: $
		1105	CODE:
		1106	api_ready (self);
		1107
		1108	int
		1109	nready(...)
		1110	PROTOTYPE:
		1111	CODE:
		1112	RETVAL = coro_nready;
		1113	OUTPUT:
		1114	RETVAL
		1115
		1116	void
		1117	schedule(...)
		1118	PROTOTYPE:
		1119	CODE:
		1120	api_schedule ();
		1121
		1122	void
		1123	cede(...)
		1124	PROTOTYPE:
		1125	CODE:
		1126	api_cede ();
		1127

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Comparing Coro/Coro/State.xs (file contents): Revision 1.8 by root, Thu Jul 19 04:13:22 2001 UTC vs. Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.8 by root, Thu Jul 19 04:13:22 2001 UTC vs.
Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC