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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs.
Revision 1.46 by pcg, Wed Nov 5 20:02:46 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 SAVE_DEFAV 0x00000001	46	#define SUB_INIT "Coro::State::initialize"
14	#define SAVE_DEFSV 0x00000002	47	#define UCORO_STATE "_coro_state"
15	#define SAVE_ERRSV 0x00000004
16		48
17	#define SAVE_ALL -1	49	/* The next macro should declare a variable stacklevel that contains and approximation
		50	* to the current C stack pointer. Its property is that it changes with each call
		51	* and should be unique. */
		52	#define dSTACKLEVEL void *stacklevel = &stacklevel
		53
		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;
18		73
19	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
20	/* optionally saved, might be zero */	83	/* optionally saved, might be zero */
21	AV *defav;	84	AV *defav;
22	SV *defsv;	85	SV *defsv;
23	SV *errsv;	86	SV *errsv;
24		87
25	/* saved global state not related to stacks */	88	/* saved global state not related to stacks */
26	U8 dowarn;	89	U8 dowarn;
		90	I32 in_eval;
27		91
28	/* the stacks and related info (callchain etc..) */	92	/* the stacks and related info (callchain etc..) */
29	PERL_SI *curstackinfo;	93	PERL_SI *curstackinfo;
30	AV *curstack;	94	AV *curstack;
31	AV *mainstack;	95	AV *mainstack;
32	SV **stack_sp;	96	SV **stack_sp;
33	OP *op;	97	OP *op;
34	SV **curpad;	98	SV **curpad;
		99	AV *comppad;
35	SV **stack_base;	100	SV **stack_base;
36	SV **stack_max;	101	SV **stack_max;
37	SV **tmps_stack;	102	SV **tmps_stack;
38	I32 tmps_floor;	103	I32 tmps_floor;
39	I32 tmps_ix;	104	I32 tmps_ix;
49	I32 savestack_max;	114	I32 savestack_max;
50	OP **retstack;	115	OP **retstack;
51	I32 retstack_ix;	116	I32 retstack_ix;
52	I32 retstack_max;	117	I32 retstack_max;
53	COP *curcop;	118	COP *curcop;
		119	JMPENV *top_env;
54		120
55	/* data associated with this coroutine (initial args) */	121	/* data associated with this coroutine (initial args) */
56	AV *args;	122	AV *args;
57	};	123	};
58		124
59	typedef struct coro *Coro__State;	125	typedef struct coro *Coro__State;
60	typedef struct coro *Coro__State_or_hashref;	126	typedef struct coro *Coro__State_or_hashref;
61		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;
62	static HV *padlist_cache;	132	static HV *padlist_cache;
		133	static SV coro_mortal; / will be freed after next transfer */
63		134
64	/* mostly copied from op.c:cv_clone2 */	135	/* mostly copied from op.c:cv_clone2 */
65	STATIC AV *	136	STATIC AV *
66	clone_padlist (AV *protopadlist)	137	clone_padlist (AV *protopadlist)
67	{	138	{
…		…
154		225
155	return newpadlist;	226	return newpadlist;
156	}	227	}
157		228
158	#ifdef MAY_FLUSH	229	#ifdef MAY_FLUSH
159	STATIC AV *	230	STATIC void
160	free_padlist (AV *padlist)	231	free_padlist (AV *padlist)
161	{	232	{
162	/* may be during global destruction */	233	/* may be during global destruction */
163	if (SvREFCNT(padlist))	234	if (SvREFCNT(padlist))
164	{	235	{
…		…
229	#endif	300	#endif
230		301
231	#define SB do {	302	#define SB do {
232	#define SE } while (0)	303	#define SE } while (0)
233		304
234	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	305	#define LOAD(state) load_state(aTHX_ (state));
235	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
236		307
237	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
238		309
239	static void	310	static void
240	load_state(pTHX_ Coro__State c)	311	load_state(pTHX_ Coro__State c)
241	{	312	{
242	PL_dowarn = c->dowarn;	313	PL_dowarn = c->dowarn;
		314	PL_in_eval = c->in_eval;
243		315
244	PL_curstackinfo = c->curstackinfo;	316	PL_curstackinfo = c->curstackinfo;
245	PL_curstack = c->curstack;	317	PL_curstack = c->curstack;
246	PL_mainstack = c->mainstack;	318	PL_mainstack = c->mainstack;
247	PL_stack_sp = c->stack_sp;	319	PL_stack_sp = c->stack_sp;
248	PL_op = c->op;	320	PL_op = c->op;
249	PL_curpad = c->curpad;	321	PL_curpad = c->curpad;
		322	PL_comppad = c->comppad;
250	PL_stack_base = c->stack_base;	323	PL_stack_base = c->stack_base;
251	PL_stack_max = c->stack_max;	324	PL_stack_max = c->stack_max;
252	PL_tmps_stack = c->tmps_stack;	325	PL_tmps_stack = c->tmps_stack;
253	PL_tmps_floor = c->tmps_floor;	326	PL_tmps_floor = c->tmps_floor;
254	PL_tmps_ix = c->tmps_ix;	327	PL_tmps_ix = c->tmps_ix;
…		…
264	PL_savestack_max = c->savestack_max;	337	PL_savestack_max = c->savestack_max;
265	PL_retstack = c->retstack;	338	PL_retstack = c->retstack;
266	PL_retstack_ix = c->retstack_ix;	339	PL_retstack_ix = c->retstack_ix;
267	PL_retstack_max = c->retstack_max;	340	PL_retstack_max = c->retstack_max;
268	PL_curcop = c->curcop;	341	PL_curcop = c->curcop;
		342	PL_top_env = c->top_env;
269		343
270	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
271	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
272	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
273		347
…		…
300	save_state(pTHX_ Coro__State c, int flags)	374	save_state(pTHX_ Coro__State c, int flags)
301	{	375	{
302	{	376	{
303	dSP;	377	dSP;
304	I32 cxix = cxstack_ix;	378	I32 cxix = cxstack_ix;
		379	PERL_CONTEXT *ccstk = cxstack;
305	PERL_SI *top_si = PL_curstackinfo;	380	PERL_SI *top_si = PL_curstackinfo;
306	PERL_CONTEXT *ccstk = cxstack;
307		381
308	/*	382	/*
309	* the worst thing you can imagine happens first - we have to save	383	* the worst thing you can imagine happens first - we have to save
310	* (and reinitialize) all cv's in the whole callchain :(	384	* (and reinitialize) all cv's in the whole callchain :(
311	*/	385	*/
312		386
313	PUSHs (Nullsv);	387	PUSHs (Nullsv);
314	/* this loop was inspired by pp_caller */	388	/* this loop was inspired by pp_caller */
315	for (;;)	389	for (;;)
316	{	390	{
317	do	391	while (cxix >= 0)
318	{	392	{
319	PERL_CONTEXT *cx = &ccstk[cxix--];	393	PERL_CONTEXT *cx = &ccstk[cxix--];
320		394
321	if (CxTYPE(cx) == CXt_SUB)	395	if (CxTYPE(cx) == CXt_SUB)
322	{	396	{
…		…
341	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
342		416
343	get_padlist (cv); /* this is a monster */	417	get_padlist (cv); /* this is a monster */
344	}	418	}
345	}	419	}
		420	#ifdef CXt_FORMAT
346	else if (CxTYPE(cx) == CXt_FORMAT)	421	else if (CxTYPE(cx) == CXt_FORMAT)
347	{	422	{
348	/* 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? */
349	/* my bold guess is as a simple, plain sub... */	424	/* my bold guess is as a simple, plain sub... */
350	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");
351	}	426	}
		427	#endif
352	}	428	}
353	while (cxix >= 0);
354		429
355	if (top_si->si_type == PERLSI_MAIN)	430	if (top_si->si_type == PERLSI_MAIN)
356	break;	431	break;
357		432
358	top_si = top_si->si_prev;	433	top_si = top_si->si_prev;
…		…
361	}	436	}
362		437
363	PUTBACK;	438	PUTBACK;
364	}	439	}
365		440
366	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;
367	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
368	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
369		444
370	c->dowarn = PL_dowarn;	445	c->dowarn = PL_dowarn;
		446	c->in_eval = PL_in_eval;
371		447
372	c->curstackinfo = PL_curstackinfo;	448	c->curstackinfo = PL_curstackinfo;
373	c->curstack = PL_curstack;	449	c->curstack = PL_curstack;
374	c->mainstack = PL_mainstack;	450	c->mainstack = PL_mainstack;
375	c->stack_sp = PL_stack_sp;	451	c->stack_sp = PL_stack_sp;
376	c->op = PL_op;	452	c->op = PL_op;
377	c->curpad = PL_curpad;	453	c->curpad = PL_curpad;
		454	c->comppad = PL_comppad;
378	c->stack_base = PL_stack_base;	455	c->stack_base = PL_stack_base;
379	c->stack_max = PL_stack_max;	456	c->stack_max = PL_stack_max;
380	c->tmps_stack = PL_tmps_stack;	457	c->tmps_stack = PL_tmps_stack;
381	c->tmps_floor = PL_tmps_floor;	458	c->tmps_floor = PL_tmps_floor;
382	c->tmps_ix = PL_tmps_ix;	459	c->tmps_ix = PL_tmps_ix;
…		…
392	c->savestack_max = PL_savestack_max;	469	c->savestack_max = PL_savestack_max;
393	c->retstack = PL_retstack;	470	c->retstack = PL_retstack;
394	c->retstack_ix = PL_retstack_ix;	471	c->retstack_ix = PL_retstack_ix;
395	c->retstack_max = PL_retstack_max;	472	c->retstack_max = PL_retstack_max;
396	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;
397	}	519	}
398		520
399	/*	521	/*
400	* destroy the stacks, the callchain etc...	522	* destroy the stacks, the callchain etc...
401	* still there is a memleak of 128 bytes...	523	* still there is a memleak of 128 bytes...
402	*/	524	*/
403	STATIC void	525	STATIC void
404	destroy_stacks(pTHX)	526	destroy_stacks(pTHX)
405	{	527	{
		528	if (!IN_DESTRUCT)
		529	{
406	/* is this ugly, I ask? */	530	/* is this ugly, I ask? */
407	while (PL_scopestack_ix)	531	while (PL_scopestack_ix)
408	LEAVE;	532	LEAVE;
409		533
410	/* sure it is, but more important: is it correct?? :/ */	534	/* sure it is, but more important: is it correct?? :/ */
411	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 */
412	FREETMPS;	536	FREETMPS;
		537	}
413		538
414	while (PL_curstackinfo->si_next)	539	while (PL_curstackinfo->si_next)
415	PL_curstackinfo = PL_curstackinfo->si_next;	540	PL_curstackinfo = PL_curstackinfo->si_next;
416		541
417	while (PL_curstackinfo)	542	while (PL_curstackinfo)
…		…
422	dSP;	547	dSP;
423	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
424	PUTBACK; /* possibly superfluous */	549	PUTBACK; /* possibly superfluous */
425	}	550	}
426		551
		552	if (!IN_DESTRUCT)
		553	{
427	dounwind(-1);	554	dounwind(-1);
428
429	SvREFCNT_dec(PL_curstackinfo->si_stack);	555	SvREFCNT_dec(PL_curstackinfo->si_stack);
		556	}
		557
430	Safefree(PL_curstackinfo->si_cxstack);	558	Safefree(PL_curstackinfo->si_cxstack);
431	Safefree(PL_curstackinfo);	559	Safefree(PL_curstackinfo);
432	PL_curstackinfo = p;	560	PL_curstackinfo = p;
433	}	561	}
434		562
…		…
437	Safefree(PL_scopestack);	565	Safefree(PL_scopestack);
438	Safefree(PL_savestack);	566	Safefree(PL_savestack);
439	Safefree(PL_retstack);	567	Safefree(PL_retstack);
440	}	568	}
441		569
442	#define SUB_INIT "Coro::State::_newcoro"	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	#else
		615	Safefree (stack->sptr);
		616	#endif
		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;
		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
		700	STATIC void
		701	transfer(pTHX_ struct coro prev, struct coro next, int flags)
		702	{
		703	dSTACKLEVEL;
		704	static struct coro *xnext;
		705
		706	if (prev != next)
		707	{
		708	xnext = next;
		709
		710	if (next->mainstack)
		711	{
		712	SAVE (prev, flags);
		713	LOAD (next);
		714
		715	/* mark this state as in-use */
		716	next->mainstack = 0;
		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
		745	}
		746	else if (next->tmps_ix == -2)
		747	croak ("tried to transfer to running coroutine");
		748	else
		749	{
		750	SAVE (prev, -1); /* first get rid of the old state */
		751
		752	if (flags & TRANSFER_SAVE_CCTXT)
		753	{
		754	if (!prev->stack)
		755	allocate_stack (prev, 0);
		756
		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	allocate_stack (next, 1);
		771	coro_create (&(next->stack->cctx),
		772	setup_coro, (void *)next,
		773	next->stack->sptr, labs (next->stack->ssize));
		774	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		775	/* don't add any code here */
		776	}
		777	}
		778	else
		779	setup_coro (next);
		780	}
		781
		782	/*
		783	* xnext is now either prev or next, depending on wether
		784	* we switched the c stack or not. that's why I use a global
		785	* variable, that should become thread-specific at one point.
		786	*/
		787	xnext->cursp = stacklevel;
		788	}
		789
		790	if (coro_mortal)
		791	{
		792	SvREFCNT_dec (coro_mortal);
		793	coro_mortal = 0;
		794	}
		795	}
		796
		797	#define SV_CORO(sv,func) \
		798	do { \
		799	if (SvROK (sv)) \
		800	sv = SvRV (sv); \
		801	\
		802	if (SvTYPE(sv) == SVt_PVHV) \
		803	{ \
		804	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		805	\
		806	if (!he) \
		807	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		808	\
		809	(sv) = SvRV (HeVAL(he)); \
		810	} \
		811	\
		812	/* must also be changed inside Coro::Cont::yield */ \
		813	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		814	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		815	\
		816	} while(0)
		817
		818	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		819
		820	static void
		821	api_transfer(pTHX_ SV prev, SV next, int flags)
		822	{
		823	SV_CORO (prev, "Coro::transfer");
		824	SV_CORO (next, "Coro::transfer");
		825
		826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		827	}
		828
		829	/ Coro ******************************************************************/
		830
		831	#define PRIO_MAX 3
		832	#define PRIO_HIGH 1
		833	#define PRIO_NORMAL 0
		834	#define PRIO_LOW -1
		835	#define PRIO_IDLE -3
		836	#define PRIO_MIN -4
		837
		838	/* for Coro.pm */
		839	static GV coro_current, coro_idle;
		840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		841	static int coro_nready;
		842
		843	static void
		844	coro_enq (SV *sv)
		845	{
		846	if (SvTYPE (sv) == SVt_PVHV)
		847	{
		848	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		849	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		850
		851	prio = prio > PRIO_MAX ? PRIO_MAX
		852	: prio < PRIO_MIN ? PRIO_MIN
		853	: prio;
		854
		855	av_push (coro_ready [prio - PRIO_MIN], sv);
		856	coro_nready++;
		857
		858	return;
		859	}
		860
		861	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		862	}
		863
		864	static SV *
		865	coro_deq (int min_prio)
		866	{
		867	int prio = PRIO_MAX - PRIO_MIN;
		868
		869	min_prio -= PRIO_MIN;
		870	if (min_prio < 0)
		871	min_prio = 0;
		872
		873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		874	if (av_len (coro_ready[prio]) >= 0)
		875	{
		876	coro_nready--;
		877	return av_shift (coro_ready[prio]);
		878	}
		879
		880	return 0;
		881	}
		882
		883	static void
		884	api_ready (SV *coro)
		885	{
		886	if (SvROK (coro))
		887	coro = SvRV (coro);
		888
		889	coro_enq (SvREFCNT_inc (coro));
		890	}
		891
		892	static void
		893	api_schedule (void)
		894	{
		895	SV prev, next;
		896
		897	prev = SvRV (GvSV (coro_current));
		898	next = coro_deq (PRIO_MIN);
		899
		900	if (!next)
		901	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		902
		903	/* free this only after the transfer */
		904	coro_mortal = prev;
		905	SV_CORO (prev, "Coro::schedule");
		906
		907	SvRV (GvSV (coro_current)) = next;
		908
		909	SV_CORO (next, "Coro::schedule");
		910
		911	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		912	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		913	}
		914
		915	static void
		916	api_cede (void)
		917	{
		918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		919
		920	api_schedule ();
		921	}
443		922
444	MODULE = Coro::State PACKAGE = Coro::State	923	MODULE = Coro::State PACKAGE = Coro::State
445		924
446	PROTOTYPES: ENABLE	925	PROTOTYPES: ENABLE
447		926
448	BOOT:	927	BOOT:
		928	{ /* {} necessary for stoopid perl-5.6.x */
		929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
449	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
450		932
451	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
452	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
453	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
454		937
455	if (!padlist_cache)	938	if (!padlist_cache)
456	padlist_cache = newHV ();	939	padlist_cache = newHV ();
		940
		941	main_mainstack = PL_mainstack;
		942
		943	coroapi.ver = CORO_API_VERSION;
		944	coroapi.transfer = api_transfer;
		945	}
457		946
458	Coro::State	947	Coro::State
459	_newprocess(args)	948	_newprocess(args)
460	SV * args	949	SV * args
461	PROTOTYPE: $	950	PROTOTYPE: $
…		…
465	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	954	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
466	croak ("Coro::State::_newprocess expects an arrayref");	955	croak ("Coro::State::_newprocess expects an arrayref");
467		956
468	New (0, coro, 1, struct coro);	957	New (0, coro, 1, struct coro);
469		958
		959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
470	coro->mainstack = 0; /* actual work is done inside transfer */	960	coro->mainstack = 0; /* actual work is done inside transfer */
471	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	961	coro->stack = 0;
		962
		963	/* same as JMPENV_BOOTSTRAP */
		964	/* we might be able to recycle start_env, but safe is safe */
		965	Zero(&coro->start_env, 1, JMPENV);
		966	coro->start_env.je_ret = -1;
		967	coro->start_env.je_mustcatch = TRUE;
472		968
473	RETVAL = coro;	969	RETVAL = coro;
474	OUTPUT:	970	OUTPUT:
475	RETVAL	971	RETVAL
476		972
477	void	973	void
478	transfer(prev, next, flags = SAVE_DEFAV)	974	transfer(prev, next, flags)
479	Coro::State_or_hashref prev	975	SV *prev
480	Coro::State_or_hashref next	976	SV *next
481	int flags	977	int flags
		978	PROTOTYPE: @
482	CODE:	979	CODE:
483
484	if (prev != next)
485	{
486	/*
487	* this could be done in newprocess which would lead to
488	* extremely elegant and fast (just SAVE/LOAD)
489	* code here, but lazy allocation of stacks has also
490	* some virtues and the overhead of the if() is nil.
491	*/
492	if (next->mainstack)
493	{
494	SAVE (prev, flags);
495	LOAD (next);
496	/* mark this state as in-use */
497	next->mainstack = 0;
498	next->tmps_ix = -2;
499	}
500	else if (next->tmps_ix == -2)
501	{
502	croak ("tried to transfer to running coroutine");
503	}
504	else
505	{
506	/*
507	* emulate part of the perl startup here.
508	*/
509	UNOP myop;
510
511	SAVE (prev, -1); /* first get rid of the old state */
512
513	init_stacks (); /* from perl.c */
514	SPAGAIN;
515
516	PL_op = (OP *)&myop;
517	/PL_curcop = 0;/
518	SvREFCNT_dec (GvAV (PL_defgv));
519	GvAV (PL_defgv) = next->args;
520
521	Zero(&myop, 1, UNOP);
522	myop.op_next = Nullop;
523	myop.op_flags = OPf_WANT_VOID;
524
525	PUSHMARK(SP);
526	XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
527	/*
528	* the next line is slightly wrong, as PL_op->op_next
529	* is actually being executed so we skip the first op.
530	* that doesn't matter, though, since it is only
531	* pp_nextstate and we never return...
532	* ah yes, and I don't care anyways ;)
533	*/
534	PUTBACK;	980	PUTBACK;
535	PL_op = pp_entersub(aTHX);	981	SV_CORO (next, "Coro::transfer");
		982	SV_CORO (prev, "Coro::transfer");
		983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
536	SPAGAIN;	984	SPAGAIN;
537
538	ENTER; /* necessary e.g. for dounwind */
539	}
540	}
541		985
542	void	986	void
543	DESTROY(coro)	987	DESTROY(coro)
544	Coro::State coro	988	Coro::State coro
545	CODE:	989	CODE:
546		990
547	if (coro->mainstack)	991	if (coro->mainstack && coro->mainstack != main_mainstack)
548	{	992	{
549	struct coro temp;	993	struct coro temp;
550		994
		995	PUTBACK;
551	SAVE(aTHX_ (&temp), SAVE_ALL);	996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
552	LOAD(aTHX_ coro);	997	LOAD(aTHX_ coro);
		998	SPAGAIN;
553		999
554	destroy_stacks ();	1000	destroy_stacks (aTHX);
555		1001
556	LOAD((&temp)); /* this will get rid of defsv etc.. */	1002	LOAD((&temp)); /* this will get rid of defsv etc.. */
		1003	SPAGAIN;
		1004
		1005	coro->mainstack = 0;
557	}	1006	}
		1007
		1008	deallocate_stack (coro);
558		1009
559	Safefree (coro);	1010	Safefree (coro);
560		1011
561	void	1012	void
562	flush()	1013	flush()
563	CODE:	1014	CODE:
564	#ifdef MAY_FLUSH	1015	#ifdef MAY_FLUSH
565	flush_padlist_cache ();	1016	flush_padlist_cache ();
566	#endif	1017	#endif
567		1018
		1019	void
		1020	_exit(code)
		1021	int code
		1022	PROTOTYPE: $
		1023	CODE:
		1024	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		1025	_exit (code);
		1026	#else
		1027	signal (SIGTERM, SIG_DFL);
		1028	raise (SIGTERM);
		1029	exit (code);
		1030	#endif
568		1031
		1032	MODULE = Coro::State PACKAGE = Coro::Cont
		1033
		1034	# this is slightly dirty (should expose a c-level api)
		1035
		1036	void
		1037	yield(...)
		1038	PROTOTYPE: @
		1039	CODE:
		1040	static SV *returnstk;
		1041	SV *sv;
		1042	AV *defav = GvAV (PL_defgv);
		1043	struct coro prev, next;
		1044
		1045	if (!returnstk)
		1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
		1047
		1048	/* set up @_ -- ugly */
		1049	av_clear (defav);
		1050	av_fill (defav, items - 1);
		1051	while (items--)
		1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1053
		1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
		1055	sv = av_pop ((AV *)SvRV (returnstk));
		1056	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
		1057	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
		1058	SvREFCNT_dec (sv);
		1059
		1060	transfer(aTHX_ prev, next, 0);
		1061
		1062	MODULE = Coro::State PACKAGE = Coro
		1063
		1064	# this is slightly dirty (should expose a c-level api)
		1065
		1066	BOOT:
		1067	{
		1068	int i;
		1069	HV *stash = gv_stashpv ("Coro", TRUE);
		1070
		1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1077
		1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1080
		1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1082	coro_ready[i] = newAV ();
		1083
		1084	{
		1085	SV *sv = perl_get_sv("Coro::API", 1);
		1086
		1087	coroapi.schedule = api_schedule;
		1088	coroapi.cede = api_cede;
		1089	coroapi.ready = api_ready;
		1090	coroapi.nready = &coro_nready;
		1091	coroapi.current = coro_current;
		1092
		1093	GCoroAPI = &coroapi;
		1094	sv_setiv(sv, (IV)&coroapi);
		1095	SvREADONLY_on(sv);
		1096	}
		1097	}
		1098
		1099	void
		1100	ready(self)
		1101	SV * self
		1102	PROTOTYPE: $
		1103	CODE:
		1104	api_ready (self);
		1105
		1106	int
		1107	nready(...)
		1108	PROTOTYPE:
		1109	CODE:
		1110	RETVAL = coro_nready;
		1111	OUTPUT:
		1112	RETVAL
		1113
		1114	void
		1115	schedule(...)
		1116	PROTOTYPE:
		1117	CODE:
		1118	api_schedule ();
		1119
		1120	void
		1121	cede(...)
		1122	PROTOTYPE:
		1123	CODE:
		1124	api_cede ();
		1125

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Comparing Coro/Coro/State.xs (file contents): Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs. Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs.
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC