[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 1.53 by pcg, Sat Feb 14 12:39:41 2004 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
		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
9	#endif	26	#endif
10		27
11	#define MAY_FLUSH /* increases codesize */	28	#include "libcoro/coro.c"
12		29
13	#define SAVE_DEFAV 0x00000001	30	#include <signal.h>
14	#define SAVE_DEFSV 0x00000002
15	#define SAVE_ERRSV 0x00000004
16		31
17	#define SAVE_ALL -1	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
		44	#define SUB_INIT "Coro::State::initialize"
		45	#define UCORO_STATE "_coro_state"
		46
		47	/* The next macro should declare a variable stacklevel that contains and approximation
		48	* to the current C stack pointer. Its property is that it changes with each call
		49	* and should be unique. */
		50	#define dSTACKLEVEL void *stacklevel = &stacklevel
		51
		52	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		53
		54	#define labs(l) ((l) >= 0 ? (l) : -(l))
		55
		56	#include "CoroAPI.h"
		57
		58	static struct CoroAPI coroapi;
		59
		60	/* this is actually not only the c stack but also c registers etc... */
		61	typedef struct {
		62	int refcnt; /* pointer reference counter */
		63	int usecnt; /* shared by how many coroutines */
		64	int gencnt; /* generation counter */
		65
		66	coro_context cctx;
		67
		68	void *sptr;
		69	long ssize; /* positive == mmap, otherwise malloc */
		70	} coro_stack;
18		71
19	struct coro {	72	struct coro {
		73	/* the top-level JMPENV for each coroutine, needed to catch dies. */
		74	JMPENV start_env;
		75
		76	/* the optional C context */
		77	coro_stack *stack;
		78	void *cursp;
		79	int gencnt;
		80
20	/* optionally saved, might be zero */	81	/* optionally saved, might be zero */
21	AV *defav;	82	AV *defav;
22	SV *defsv;	83	SV *defsv;
23	SV *errsv;	84	SV *errsv;
24		85
25	/* saved global state not related to stacks */	86	/* saved global state not related to stacks */
26	U8 dowarn;	87	U8 dowarn;
		88	I32 in_eval;
27		89
28	/* the stacks and related info (callchain etc..) */	90	/* the stacks and related info (callchain etc..) */
29	PERL_SI *curstackinfo;	91	PERL_SI *curstackinfo;
30	AV *curstack;	92	AV *curstack;
31	AV *mainstack;	93	AV *mainstack;
32	SV **stack_sp;	94	SV **stack_sp;
33	OP *op;	95	OP *op;
34	SV **curpad;	96	SV **curpad;
		97	AV *comppad;
35	SV **stack_base;	98	SV **stack_base;
36	SV **stack_max;	99	SV **stack_max;
37	SV **tmps_stack;	100	SV **tmps_stack;
38	I32 tmps_floor;	101	I32 tmps_floor;
39	I32 tmps_ix;	102	I32 tmps_ix;
49	I32 savestack_max;	112	I32 savestack_max;
50	OP **retstack;	113	OP **retstack;
51	I32 retstack_ix;	114	I32 retstack_ix;
52	I32 retstack_max;	115	I32 retstack_max;
53	COP *curcop;	116	COP *curcop;
		117	JMPENV *top_env;
54		118
55	/* data associated with this coroutine (initial args) */	119	/* data associated with this coroutine (initial args) */
56	AV *args;	120	AV *args;
57	};	121	};
58		122
59	typedef struct coro *Coro__State;	123	typedef struct coro *Coro__State;
60	typedef struct coro *Coro__State_or_hashref;	124	typedef struct coro *Coro__State_or_hashref;
61		125
		126	static AV main_mainstack; / used to differentiate between $main and others */
		127	static HV *coro_state_stash;
		128	static SV *ucoro_state_sv;
		129	static U32 ucoro_state_hash;
62	static HV *padlist_cache;	130	static HV *padlist_cache;
		131	static SV coro_mortal; / will be freed after next transfer */
63		132
64	/* mostly copied from op.c:cv_clone2 */	133	/* mostly copied from op.c:cv_clone2 */
65	STATIC AV *	134	STATIC AV *
66	clone_padlist (AV *protopadlist)	135	clone_padlist (AV *protopadlist)
67	{	136	{
…		…
113	sv = (SV *) newAV ();	182	sv = (SV *) newAV ();
114	else if (*name == '%')	183	else if (*name == '%')
115	sv = (SV *) newHV ();	184	sv = (SV *) newHV ();
116	else	185	else
117	sv = NEWSV (0, 0);	186	sv = NEWSV (0, 0);
		187	#ifdef SvPADBUSY
118	if (!SvPADBUSY (sv))	188	if (!SvPADBUSY (sv))
		189	#endif
119	SvPADMY_on (sv);	190	SvPADMY_on (sv);
120	npad[ix] = sv;	191	npad[ix] = sv;
121	}	192	}
122	}	193	}
123	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	194	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
…		…
153	#endif	224	#endif
154		225
155	return newpadlist;	226	return newpadlist;
156	}	227	}
157		228
158	#ifdef MAY_FLUSH	229	STATIC void
159	STATIC AV *
160	free_padlist (AV *padlist)	230	free_padlist (AV *padlist)
161	{	231	{
162	/* may be during global destruction */	232	/* may be during global destruction */
163	if (SvREFCNT(padlist))	233	if (SvREFCNT (padlist))
164	{	234	{
165	I32 i = AvFILLp(padlist);	235	I32 i = AvFILLp (padlist);
166	while (i >= 0)	236	while (i >= 0)
167	{	237	{
168	SV **svp = av_fetch(padlist, i--, FALSE);	238	SV **svp = av_fetch (padlist, i--, FALSE);
169	SV sv = svp ? svp : Nullsv;
170	if (sv)	239	if (svp)
		240	{
		241	SV *sv;
		242	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
171	SvREFCNT_dec(sv);	243	SvREFCNT_dec (sv);
		244
		245	SvREFCNT_dec (*svp);
		246	}
172	}	247	}
173		248
174	SvREFCNT_dec((SV*)padlist);	249	SvREFCNT_dec ((SV*)padlist);
175	}	250	}
176	}	251	}
177	#endif	252
		253	STATIC int
		254	coro_cv_free (SV sv, MAGIC mg)
		255	{
		256	AV *padlist;
		257	AV av = (AV )mg->mg_obj;
		258
		259	/* casting is fun. */
		260	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		261	free_padlist (padlist);
		262	}
		263
		264	#define PERL_MAGIC_coro PERL_MAGIC_ext
		265
		266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
178		267
179	/* the next two functions merely cache the padlists */	268	/* the next two functions merely cache the padlists */
180	STATIC void	269	STATIC void
181	get_padlist (CV *cv)	270	get_padlist (CV *cv)
182	{	271	{
183	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	272	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
184		273
185	if (he && AvFILLp ((AV )he) >= 0)	274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
186	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	275	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);
187	else	276	else
188	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
189	}	278	}
190		279
191	STATIC void	280	STATIC void
192	put_padlist (CV *cv)	281	put_padlist (CV *cv)
193	{	282	{
194	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);	283	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
195		284
196	if (SvTYPE (*he) != SVt_PVAV)	285	if (!mg)
197	{	286	{
198	SvREFCNT_dec (*he);	287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		289	mg->mg_virtual = &vtbl_coro;
199	he = (SV )newAV ();	290	mg->mg_obj = (SV *)newAV ();
200	}	291	}
201		292
202	av_push ((AV )he, (SV *)CvPADLIST (cv));	293	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));
203	}	294	}
204
205	#ifdef MAY_FLUSH
206	STATIC void
207	flush_padlist_cache ()
208	{
209	HV *hv = padlist_cache;
210	padlist_cache = newHV ();
211
212	if (hv_iterinit (hv))
213	{
214	HE *he;
215	AV *padlist;
216
217	while (!!(he = hv_iternext (hv)))
218	{
219	AV av = (AV )HeVAL(he);
220
221	/* casting is fun. */
222	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
223	free_padlist (padlist);
224	}
225	}
226
227	SvREFCNT_dec (hv);
228	}
229	#endif
230		295
231	#define SB do {	296	#define SB do {
232	#define SE } while (0)	297	#define SE } while (0)
233		298
234	#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE	299	#define LOAD(state) load_state(aTHX_ (state));
235	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE	300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
236		301
237	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	302	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
238		303
239	static void	304	static void
240	load_state(pTHX_ Coro__State c)	305	load_state(pTHX_ Coro__State c)
241	{	306	{
242	PL_dowarn = c->dowarn;	307	PL_dowarn = c->dowarn;
		308	PL_in_eval = c->in_eval;
243		309
244	PL_curstackinfo = c->curstackinfo;	310	PL_curstackinfo = c->curstackinfo;
245	PL_curstack = c->curstack;	311	PL_curstack = c->curstack;
246	PL_mainstack = c->mainstack;	312	PL_mainstack = c->mainstack;
247	PL_stack_sp = c->stack_sp;	313	PL_stack_sp = c->stack_sp;
248	PL_op = c->op;	314	PL_op = c->op;
249	PL_curpad = c->curpad;	315	PL_curpad = c->curpad;
		316	PL_comppad = c->comppad;
250	PL_stack_base = c->stack_base;	317	PL_stack_base = c->stack_base;
251	PL_stack_max = c->stack_max;	318	PL_stack_max = c->stack_max;
252	PL_tmps_stack = c->tmps_stack;	319	PL_tmps_stack = c->tmps_stack;
253	PL_tmps_floor = c->tmps_floor;	320	PL_tmps_floor = c->tmps_floor;
254	PL_tmps_ix = c->tmps_ix;	321	PL_tmps_ix = c->tmps_ix;
…		…
264	PL_savestack_max = c->savestack_max;	331	PL_savestack_max = c->savestack_max;
265	PL_retstack = c->retstack;	332	PL_retstack = c->retstack;
266	PL_retstack_ix = c->retstack_ix;	333	PL_retstack_ix = c->retstack_ix;
267	PL_retstack_max = c->retstack_max;	334	PL_retstack_max = c->retstack_max;
268	PL_curcop = c->curcop;	335	PL_curcop = c->curcop;
		336	PL_top_env = c->top_env;
269		337
270	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
271	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
272	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
273		341
…		…
300	save_state(pTHX_ Coro__State c, int flags)	368	save_state(pTHX_ Coro__State c, int flags)
301	{	369	{
302	{	370	{
303	dSP;	371	dSP;
304	I32 cxix = cxstack_ix;	372	I32 cxix = cxstack_ix;
		373	PERL_CONTEXT *ccstk = cxstack;
305	PERL_SI *top_si = PL_curstackinfo;	374	PERL_SI *top_si = PL_curstackinfo;
306	PERL_CONTEXT *ccstk = cxstack;
307		375
308	/*	376	/*
309	* the worst thing you can imagine happens first - we have to save	377	* the worst thing you can imagine happens first - we have to save
310	* (and reinitialize) all cv's in the whole callchain :(	378	* (and reinitialize) all cv's in the whole callchain :(
311	*/	379	*/
312		380
313	PUSHs (Nullsv);	381	PUSHs (Nullsv);
314	/* this loop was inspired by pp_caller */	382	/* this loop was inspired by pp_caller */
315	for (;;)	383	for (;;)
316	{	384	{
317	do	385	while (cxix >= 0)
318	{	386	{
319	PERL_CONTEXT *cx = &ccstk[cxix--];	387	PERL_CONTEXT *cx = &ccstk[cxix--];
320		388
321	if (CxTYPE(cx) == CXt_SUB)	389	if (CxTYPE(cx) == CXt_SUB)
322	{	390	{
…		…
341	PUSHs ((SV *)cv);	409	PUSHs ((SV *)cv);
342		410
343	get_padlist (cv); /* this is a monster */	411	get_padlist (cv); /* this is a monster */
344	}	412	}
345	}	413	}
		414	#ifdef CXt_FORMAT
346	else if (CxTYPE(cx) == CXt_FORMAT)	415	else if (CxTYPE(cx) == CXt_FORMAT)
347	{	416	{
348	/* I never used formats, so how should I know how these are implemented? */	417	/* I never used formats, so how should I know how these are implemented? */
349	/* my bold guess is as a simple, plain sub... */	418	/* my bold guess is as a simple, plain sub... */
350	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	419	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
351	}	420	}
		421	#endif
352	}	422	}
353	while (cxix >= 0);
354		423
355	if (top_si->si_type == PERLSI_MAIN)	424	if (top_si->si_type == PERLSI_MAIN)
356	break;	425	break;
357		426
358	top_si = top_si->si_prev;	427	top_si = top_si->si_prev;
…		…
361	}	430	}
362		431
363	PUTBACK;	432	PUTBACK;
364	}	433	}
365		434
366	c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
367	c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
368	c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
369		438
370	c->dowarn = PL_dowarn;	439	c->dowarn = PL_dowarn;
		440	c->in_eval = PL_in_eval;
371		441
372	c->curstackinfo = PL_curstackinfo;	442	c->curstackinfo = PL_curstackinfo;
373	c->curstack = PL_curstack;	443	c->curstack = PL_curstack;
374	c->mainstack = PL_mainstack;	444	c->mainstack = PL_mainstack;
375	c->stack_sp = PL_stack_sp;	445	c->stack_sp = PL_stack_sp;
376	c->op = PL_op;	446	c->op = PL_op;
377	c->curpad = PL_curpad;	447	c->curpad = PL_curpad;
		448	c->comppad = PL_comppad;
378	c->stack_base = PL_stack_base;	449	c->stack_base = PL_stack_base;
379	c->stack_max = PL_stack_max;	450	c->stack_max = PL_stack_max;
380	c->tmps_stack = PL_tmps_stack;	451	c->tmps_stack = PL_tmps_stack;
381	c->tmps_floor = PL_tmps_floor;	452	c->tmps_floor = PL_tmps_floor;
382	c->tmps_ix = PL_tmps_ix;	453	c->tmps_ix = PL_tmps_ix;
…		…
392	c->savestack_max = PL_savestack_max;	463	c->savestack_max = PL_savestack_max;
393	c->retstack = PL_retstack;	464	c->retstack = PL_retstack;
394	c->retstack_ix = PL_retstack_ix;	465	c->retstack_ix = PL_retstack_ix;
395	c->retstack_max = PL_retstack_max;	466	c->retstack_max = PL_retstack_max;
396	c->curcop = PL_curcop;	467	c->curcop = PL_curcop;
		468	c->top_env = PL_top_env;
		469	}
		470
		471	/*
		472	* allocate various perl stacks. This is an exact copy
		473	* of perl.c:init_stacks, except that it uses less memory
		474	* on the (sometimes correct) assumption that coroutines do
		475	* not usually need a lot of stackspace.
		476	*/
		477	STATIC void
		478	coro_init_stacks (pTHX)
		479	{
		480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		481	PL_curstackinfo->si_type = PERLSI_MAIN;
		482	PL_curstack = PL_curstackinfo->si_stack;
		483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
		484
		485	PL_stack_base = AvARRAY(PL_curstack);
		486	PL_stack_sp = PL_stack_base;
		487	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
		488
		489	New(50,PL_tmps_stack,96,SV*);
		490	PL_tmps_floor = -1;
		491	PL_tmps_ix = -1;
		492	PL_tmps_max = 96;
		493
		494	New(54,PL_markstack,16,I32);
		495	PL_markstack_ptr = PL_markstack;
		496	PL_markstack_max = PL_markstack + 16;
		497
		498	#ifdef SET_MARK_OFFSET
		499	SET_MARK_OFFSET;
		500	#endif
		501
		502	New(54,PL_scopestack,16,I32);
		503	PL_scopestack_ix = 0;
		504	PL_scopestack_max = 16;
		505
		506	New(54,PL_savestack,96,ANY);
		507	PL_savestack_ix = 0;
		508	PL_savestack_max = 96;
		509
		510	New(54,PL_retstack,8,OP*);
		511	PL_retstack_ix = 0;
		512	PL_retstack_max = 8;
397	}	513	}
398		514
399	/*	515	/*
400	* destroy the stacks, the callchain etc...	516	* destroy the stacks, the callchain etc...
401	* still there is a memleak of 128 bytes...
402	*/	517	*/
403	STATIC void	518	STATIC void
404	destroy_stacks(pTHX)	519	destroy_stacks(pTHX)
405	{	520	{
		521	if (!IN_DESTRUCT)
		522	{
406	/* is this ugly, I ask? */	523	/* is this ugly, I ask? */
407	while (PL_scopestack_ix)	524	LEAVE_SCOPE (0);
408	LEAVE;
409		525
410	/* sure it is, but more important: is it correct?? :/ */	526	/* sure it is, but more important: is it correct?? :/ */
411	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
412	FREETMPS;	527	FREETMPS;
		528	}
413		529
414	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
415	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
416		532
417	while (PL_curstackinfo)	533	while (PL_curstackinfo)
…		…
422	dSP;	538	dSP;
423	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	539	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
424	PUTBACK; /* possibly superfluous */	540	PUTBACK; /* possibly superfluous */
425	}	541	}
426		542
		543	if (!IN_DESTRUCT)
		544	{
427	dounwind(-1);	545	dounwind(-1);
428
429	SvREFCNT_dec(PL_curstackinfo->si_stack);	546	SvREFCNT_dec(PL_curstackinfo->si_stack);
		547	}
		548
430	Safefree(PL_curstackinfo->si_cxstack);	549	Safefree(PL_curstackinfo->si_cxstack);
431	Safefree(PL_curstackinfo);	550	Safefree(PL_curstackinfo);
432	PL_curstackinfo = p;	551	PL_curstackinfo = p;
433	}	552	}
434		553
…		…
437	Safefree(PL_scopestack);	556	Safefree(PL_scopestack);
438	Safefree(PL_savestack);	557	Safefree(PL_savestack);
439	Safefree(PL_retstack);	558	Safefree(PL_retstack);
440	}	559	}
441		560
442	#define SUB_INIT "Coro::State::_newcoro"	561	static void
		562	allocate_stack (Coro__State ctx, int alloc)
		563	{
		564	coro_stack *stack;
		565
		566	New (0, stack, 1, coro_stack);
		567
		568	stack->refcnt = 1;
		569	stack->usecnt = 1;
		570	stack->gencnt = ctx->gencnt = 0;
		571	if (alloc)
		572	{
		573	#if HAVE_MMAP
		574	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
		575	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		576	if (stack->sptr == (void *)-1)
		577	#endif
		578	{
		579	/FIXME//D//* reasonable stack size! */
		580	stack->ssize = - (8192 * sizeof (long));
		581	New (0, stack->sptr, 8192, long);
		582	}
		583	}
		584	else
		585	stack->sptr = 0;
		586
		587	ctx->stack = stack;
		588	}
		589
		590	static void
		591	deallocate_stack (Coro__State ctx)
		592	{
		593	coro_stack *stack = ctx->stack;
		594
		595	ctx->stack = 0;
		596
		597	if (stack)
		598	{
		599	if (!--stack->refcnt)
		600	{
		601	#ifdef HAVE_MMAP
		602	if (stack->ssize > 0 && stack->sptr)
		603	munmap (stack->sptr, stack->ssize);
		604	else
		605	#endif
		606	Safefree (stack->sptr);
		607
		608	Safefree (stack);
		609	}
		610	else if (ctx->gencnt == stack->gencnt)
		611	--stack->usecnt;
		612	}
		613	}
		614
		615	static void
		616	setup_coro (void *arg)
		617	{
		618	/*
		619	* emulate part of the perl startup here.
		620	*/
		621	dSP;
		622	Coro__State ctx = (Coro__State)arg;
		623	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
		624
		625	coro_init_stacks (aTHX);
		626	/PL_curcop = 0;/
		627	/PL_in_eval = PL_in_eval;/ /* inherit */
		628	SvREFCNT_dec (GvAV (PL_defgv));
		629	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
		630
		631	SPAGAIN;
		632
		633	if (ctx->stack)
		634	{
		635	ctx->cursp = 0;
		636
		637	PUSHMARK(SP);
		638	PUTBACK;
		639	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		640
		641	if (SvTRUE (ERRSV))
		642	croak (NULL);
		643	else
		644	croak ("FATAL: CCTXT coroutine returned!");
		645	}
		646	else
		647	{
		648	UNOP myop;
		649
		650	PL_op = (OP *)&myop;
		651
		652	Zero(&myop, 1, UNOP);
		653	myop.op_next = Nullop;
		654	myop.op_flags = OPf_WANT_VOID;
		655
		656	PUSHMARK(SP);
		657	XPUSHs (sub_init);
		658	/*
		659	* the next line is slightly wrong, as PL_op->op_next
		660	* is actually being executed so we skip the first op.
		661	* that doesn't matter, though, since it is only
		662	* pp_nextstate and we never return...
		663	* ah yes, and I don't care anyways ;)
		664	*/
		665	PUTBACK;
		666	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		667	SPAGAIN;
		668
		669	ENTER; /* necessary e.g. for dounwind */
		670	}
		671	}
		672
		673	static void
		674	continue_coro (void *arg)
		675	{
		676	/*
		677	* this is a _very_ stripped down perl interpreter ;)
		678	*/
		679	Coro__State ctx = (Coro__State)arg;
		680	JMPENV coro_start_env;
		681
		682	PL_top_env = &ctx->start_env;
		683
		684	ctx->cursp = 0;
		685	PL_op = PL_op->op_next;
		686	CALLRUNOPS(aTHX);
		687
		688	abort ();
		689	}
		690
		691	STATIC void
		692	transfer(pTHX_ struct coro prev, struct coro next, int flags)
		693	{
		694	dSTACKLEVEL;
		695	static struct coro *xnext;
		696
		697	if (prev != next)
		698	{
		699	xnext = next;
		700
		701	if (next->mainstack)
		702	{
		703	SAVE (prev, flags);
		704	LOAD (next);
		705
		706	/* mark this state as in-use */
		707	next->mainstack = 0;
		708	next->tmps_ix = -2;
		709
		710	/* stacklevel changed? if yes, grab the stack for us! */
		711	if (flags & TRANSFER_SAVE_CCTXT)
		712	{
		713	if (!prev->stack)
		714	allocate_stack (prev, 0);
		715	else if (prev->cursp != stacklevel
		716	&& prev->stack->usecnt > 1)
		717	{
		718	prev->gencnt = ++prev->stack->gencnt;
		719	prev->stack->usecnt = 1;
		720	}
		721
		722	/* has our stack been invalidated? */
		723	if (next->stack && next->stack->gencnt != next->gencnt)
		724	{
		725	deallocate_stack (next);
		726	allocate_stack (next, 1);
		727	coro_create (&(next->stack->cctx),
		728	continue_coro, (void *)next,
		729	next->stack->sptr, labs (next->stack->ssize));
		730	}
		731
		732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		733	/* don't add any code here */
		734	}
		735
		736	}
		737	else if (next->tmps_ix == -2)
		738	croak ("tried to transfer to running coroutine");
		739	else
		740	{
		741	SAVE (prev, -1); /* first get rid of the old state */
		742
		743	if (flags & TRANSFER_SAVE_CCTXT)
		744	{
		745	if (!prev->stack)
		746	allocate_stack (prev, 0);
		747
		748	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		749	{
		750	PL_top_env = &next->start_env;
		751
		752	setup_coro (next);
		753
		754	prev->stack->refcnt++;
		755	prev->stack->usecnt++;
		756	next->stack = prev->stack;
		757	next->gencnt = prev->gencnt;
		758	}
		759	else
		760	{
		761	assert (!next->stack);
		762	allocate_stack (next, 1);
		763	coro_create (&(next->stack->cctx),
		764	setup_coro, (void *)next,
		765	next->stack->sptr, labs (next->stack->ssize));
		766	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		767	/* don't add any code here */
		768	}
		769	}
		770	else
		771	setup_coro (next);
		772	}
		773
		774	/*
		775	* xnext is now either prev or next, depending on wether
		776	* we switched the c stack or not. that's why I use a global
		777	* variable, that should become thread-specific at one point.
		778	*/
		779	xnext->cursp = stacklevel;
		780	}
		781
		782	if (coro_mortal)
		783	{
		784	SvREFCNT_dec (coro_mortal);
		785	coro_mortal = 0;
		786	}
		787	}
		788
		789	#define SV_CORO(sv,func) \
		790	do { \
		791	if (SvROK (sv)) \
		792	sv = SvRV (sv); \
		793	\
		794	if (SvTYPE(sv) == SVt_PVHV) \
		795	{ \
		796	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		797	\
		798	if (!he) \
		799	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		800	\
		801	(sv) = SvRV (HeVAL(he)); \
		802	} \
		803	\
		804	/* must also be changed inside Coro::Cont::yield */ \
		805	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		806	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		807	\
		808	} while(0)
		809
		810	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		811
		812	static void
		813	api_transfer(pTHX_ SV prev, SV next, int flags)
		814	{
		815	SV_CORO (prev, "Coro::transfer");
		816	SV_CORO (next, "Coro::transfer");
		817
		818	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		819	}
		820
		821	/ Coro ******************************************************************/
		822
		823	#define PRIO_MAX 3
		824	#define PRIO_HIGH 1
		825	#define PRIO_NORMAL 0
		826	#define PRIO_LOW -1
		827	#define PRIO_IDLE -3
		828	#define PRIO_MIN -4
		829
		830	/* for Coro.pm */
		831	static GV coro_current, coro_idle;
		832	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		833	static int coro_nready;
		834
		835	static void
		836	coro_enq (SV *sv)
		837	{
		838	if (SvTYPE (sv) == SVt_PVHV)
		839	{
		840	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		841	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		842
		843	prio = prio > PRIO_MAX ? PRIO_MAX
		844	: prio < PRIO_MIN ? PRIO_MIN
		845	: prio;
		846
		847	av_push (coro_ready [prio - PRIO_MIN], sv);
		848	coro_nready++;
		849
		850	return;
		851	}
		852
		853	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		854	}
		855
		856	static SV *
		857	coro_deq (int min_prio)
		858	{
		859	int prio = PRIO_MAX - PRIO_MIN;
		860
		861	min_prio -= PRIO_MIN;
		862	if (min_prio < 0)
		863	min_prio = 0;
		864
		865	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		866	if (av_len (coro_ready[prio]) >= 0)
		867	{
		868	coro_nready--;
		869	return av_shift (coro_ready[prio]);
		870	}
		871
		872	return 0;
		873	}
		874
		875	static void
		876	api_ready (SV *coro)
		877	{
		878	if (SvROK (coro))
		879	coro = SvRV (coro);
		880
		881	coro_enq (SvREFCNT_inc (coro));
		882	}
		883
		884	static void
		885	api_schedule (void)
		886	{
		887	SV prev, next;
		888
		889	prev = SvRV (GvSV (coro_current));
		890	next = coro_deq (PRIO_MIN);
		891
		892	if (!next)
		893	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		894
		895	/* free this only after the transfer */
		896	coro_mortal = prev;
		897	SV_CORO (prev, "Coro::schedule");
		898
		899	SvRV (GvSV (coro_current)) = next;
		900
		901	SV_CORO (next, "Coro::schedule");
		902
		903	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		904	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		905	}
		906
		907	static void
		908	api_cede (void)
		909	{
		910	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		911
		912	api_schedule ();
		913	}
443		914
444	MODULE = Coro::State PACKAGE = Coro::State	915	MODULE = Coro::State PACKAGE = Coro::State
445		916
446	PROTOTYPES: ENABLE	917	PROTOTYPES: ENABLE
447		918
448	BOOT:	919	BOOT:
		920	{ /* {} necessary for stoopid perl-5.6.x */
		921	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		922	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
449	HV * stash = gv_stashpvn("Coro::State", 10, TRUE);	923	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
450		924
451	newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV));	925	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
452	newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV));	926	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
453	newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV));	927	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		928	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
454		929
455	if (!padlist_cache)	930	if (!padlist_cache)
456	padlist_cache = newHV ();	931	padlist_cache = newHV ();
		932
		933	main_mainstack = PL_mainstack;
		934
		935	coroapi.ver = CORO_API_VERSION;
		936	coroapi.transfer = api_transfer;
		937	}
457		938
458	Coro::State	939	Coro::State
459	_newprocess(args)	940	_newprocess(args)
460	SV * args	941	SV * args
461	PROTOTYPE: $	942	PROTOTYPE: $
…		…
463	Coro__State coro;	944	Coro__State coro;
464		945
465	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	946	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
466	croak ("Coro::State::_newprocess expects an arrayref");	947	croak ("Coro::State::_newprocess expects an arrayref");
467		948
468	New (0, coro, 1, struct coro);	949	Newz (0, coro, 1, struct coro);
469		950
		951	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
470	coro->mainstack = 0; /* actual work is done inside transfer */	952	coro->mainstack = 0; /* actual work is done inside transfer */
471	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	953	coro->stack = 0;
		954
		955	/* same as JMPENV_BOOTSTRAP */
		956	/* we might be able to recycle start_env, but safe is safe */
		957	//Zero(&coro->start_env, 1, JMPENV);
		958	coro->start_env.je_ret = -1;
		959	coro->start_env.je_mustcatch = TRUE;
472		960
473	RETVAL = coro;	961	RETVAL = coro;
474	OUTPUT:	962	OUTPUT:
475	RETVAL	963	RETVAL
476		964
477	void	965	void
478	transfer(prev, next, flags = SAVE_DEFAV)	966	transfer(prev, next, flags)
479	Coro::State_or_hashref prev	967	SV *prev
480	Coro::State_or_hashref next	968	SV *next
481	int flags	969	int flags
		970	PROTOTYPE: @
482	CODE:	971	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;	972	PUTBACK;
535	PL_op = pp_entersub(aTHX);	973	SV_CORO (next, "Coro::transfer");
		974	SV_CORO (prev, "Coro::transfer");
		975	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
536	SPAGAIN;	976	SPAGAIN;
537
538	ENTER; /* necessary e.g. for dounwind */
539	}
540	}
541		977
542	void	978	void
543	DESTROY(coro)	979	DESTROY(coro)
544	Coro::State coro	980	Coro::State coro
545	CODE:	981	CODE:
546		982
547	if (coro->mainstack)	983	if (coro->mainstack && coro->mainstack != main_mainstack)
548	{	984	{
549	struct coro temp;	985	struct coro temp;
550		986
		987	PUTBACK;
551	SAVE(aTHX_ (&temp), SAVE_ALL);	988	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
552	LOAD(aTHX_ coro);	989	LOAD(aTHX_ coro);
		990	SPAGAIN;
553		991
554	destroy_stacks ();	992	destroy_stacks (aTHX);
555		993
556	LOAD((&temp)); /* this will get rid of defsv etc.. */	994	LOAD((&temp)); /* this will get rid of defsv etc.. */
		995	SPAGAIN;
		996
		997	coro->mainstack = 0;
557	}	998	}
558		999
		1000	deallocate_stack (coro);
		1001	SvREFCNT_dec (coro->args);
559	Safefree (coro);	1002	Safefree (coro);
560		1003
561	void	1004	void
562	flush()	1005	_exit(code)
		1006	int code
		1007	PROTOTYPE: $
563	CODE:	1008	CODE:
564	#ifdef MAY_FLUSH	1009	_exit (code);
565	flush_padlist_cache ();	1010
		1011	MODULE = Coro::State PACKAGE = Coro::Cont
		1012
		1013	# this is slightly dirty (should expose a c-level api)
		1014
		1015	void
		1016	yield(...)
		1017	PROTOTYPE: @
		1018	CODE:
		1019	static SV *returnstk;
		1020	SV *sv;
		1021	AV *defav = GvAV (PL_defgv);
		1022	struct coro prev, next;
		1023
		1024	if (!returnstk)
		1025	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
		1026
		1027	/* set up @_ -- ugly */
		1028	av_clear (defav);
		1029	av_fill (defav, items - 1);
		1030	while (items--)
		1031	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1032
		1033	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
		1034	sv = av_pop ((AV *)SvRV (returnstk));
		1035	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
		1036	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
		1037	SvREFCNT_dec (sv);
		1038
		1039	transfer(aTHX_ prev, next, 0);
		1040
		1041	MODULE = Coro::State PACKAGE = Coro
		1042
		1043	# this is slightly dirty (should expose a c-level api)
		1044
		1045	BOOT:
		1046	{
		1047	int i;
		1048	HV *stash = gv_stashpv ("Coro", TRUE);
		1049
		1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1056
		1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1059
		1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1061	coro_ready[i] = newAV ();
		1062
		1063	{
		1064	SV *sv = perl_get_sv("Coro::API", 1);
		1065
		1066	coroapi.schedule = api_schedule;
		1067	coroapi.cede = api_cede;
		1068	coroapi.ready = api_ready;
		1069	coroapi.nready = &coro_nready;
		1070	coroapi.current = coro_current;
		1071
		1072	GCoroAPI = &coroapi;
		1073	sv_setiv(sv, (IV)&coroapi);
		1074	SvREADONLY_on(sv);
		1075	}
		1076	}
		1077
		1078	#if !PERL_MICRO
		1079
		1080	void
		1081	ready(self)
		1082	SV * self
		1083	PROTOTYPE: $
		1084	CODE:
		1085	api_ready (self);
		1086
566	#endif	1087	#endif
567		1088
		1089	int
		1090	nready(...)
		1091	PROTOTYPE:
		1092	CODE:
		1093	RETVAL = coro_nready;
		1094	OUTPUT:
		1095	RETVAL
568		1096
		1097	void
		1098	schedule(...)
		1099	PROTOTYPE:
		1100	CODE:
		1101	api_schedule ();
		1102
		1103	void
		1104	cede(...)
		1105	PROTOTYPE:
		1106	CODE:
		1107	api_cede ();
		1108

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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 1.53 by pcg, Sat Feb 14 12:39:41 2004 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 1.53 by pcg, Sat Feb 14 12:39:41 2004 UTC