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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.14 by root, Mon Jul 23 23:48:05 2001 UTC vs.
Revision 1.50 by pcg, Sun Nov 30 16:59:15 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	#include "patchlevel.h"
		6
		7	#if PATCHLEVEL < 6
		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
		26	#endif
		27
5	#include "libcoro/coro.c"	28	#include "libcoro/coro.c"
		29
		30	#include <signal.h>
6		31
7	#ifdef HAVE_MMAP	32	#ifdef HAVE_MMAP
8	# include <unistd.h>	33	# include <unistd.h>
9	# include <sys/mman.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
10	#endif	42	#endif
11
12	#define MAY_FLUSH /* increases codesize */
13
14	#define TRANSFER_SAVE_DEFAV 0x00000001
15	#define TRANSFER_SAVE_DEFSV 0x00000002
16	#define TRANSFER_SAVE_ERRSV 0x00000004
17	#define TRANSFER_SAVE_CCTXT 0x00000008
18
19	#define TRANSFER_SAVE_ALL -1
20		43
21	#define SUB_INIT "Coro::State::initialize"	44	#define SUB_INIT "Coro::State::initialize"
22	#define UCORO_STATE "_coro_state"	45	#define UCORO_STATE "_coro_state"
23		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;
		71
24	struct coro {	72	struct coro {
		73	/* the top-level JMPENV for each coroutine, needed to catch dies. */
		74	JMPENV start_env;
		75
25	/* the optional C context */	76	/* the optional C context */
26	coro_context cctx;	77	coro_stack *stack;
27	void *sptr;	78	void *cursp;
28	long ssize;	79	int gencnt;
29		80
30	/* optionally saved, might be zero */	81	/* optionally saved, might be zero */
31	AV *defav;	82	AV *defav;
32	SV *defsv;	83	SV *defsv;
33	SV *errsv;	84	SV *errsv;
34		85
35	/* saved global state not related to stacks */	86	/* saved global state not related to stacks */
36	U8 dowarn;	87	U8 dowarn;
		88	I32 in_eval;
37		89
38	/* the stacks and related info (callchain etc..) */	90	/* the stacks and related info (callchain etc..) */
39	PERL_SI *curstackinfo;	91	PERL_SI *curstackinfo;
40	AV *curstack;	92	AV *curstack;
41	AV *mainstack;	93	AV *mainstack;
42	SV **stack_sp;	94	SV **stack_sp;
43	OP *op;	95	OP *op;
44	SV **curpad;	96	SV **curpad;
		97	AV *comppad;
45	SV **stack_base;	98	SV **stack_base;
46	SV **stack_max;	99	SV **stack_max;
47	SV **tmps_stack;	100	SV **tmps_stack;
48	I32 tmps_floor;	101	I32 tmps_floor;
49	I32 tmps_ix;	102	I32 tmps_ix;
59	I32 savestack_max;	112	I32 savestack_max;
60	OP **retstack;	113	OP **retstack;
61	I32 retstack_ix;	114	I32 retstack_ix;
62	I32 retstack_max;	115	I32 retstack_max;
63	COP *curcop;	116	COP *curcop;
64	JMPENV start_env;
65	JMPENV *top_env;	117	JMPENV *top_env;
66		118
67	/* data associated with this coroutine (initial args) */	119	/* data associated with this coroutine (initial args) */
68	AV *args;	120	AV *args;
69	};	121	};
…		…
74	static AV main_mainstack; / used to differentiate between $main and others */	126	static AV main_mainstack; / used to differentiate between $main and others */
75	static HV *coro_state_stash;	127	static HV *coro_state_stash;
76	static SV *ucoro_state_sv;	128	static SV *ucoro_state_sv;
77	static U32 ucoro_state_hash;	129	static U32 ucoro_state_hash;
78	static HV *padlist_cache;	130	static HV *padlist_cache;
		131	static SV coro_mortal; / will be freed after next transfer */
79		132
80	/* mostly copied from op.c:cv_clone2 */	133	/* mostly copied from op.c:cv_clone2 */
81	STATIC AV *	134	STATIC AV *
82	clone_padlist (AV *protopadlist)	135	clone_padlist (AV *protopadlist)
83	{	136	{
…		…
129	sv = (SV *) newAV ();	182	sv = (SV *) newAV ();
130	else if (*name == '%')	183	else if (*name == '%')
131	sv = (SV *) newHV ();	184	sv = (SV *) newHV ();
132	else	185	else
133	sv = NEWSV (0, 0);	186	sv = NEWSV (0, 0);
		187	#ifdef SvPADBUSY
134	if (!SvPADBUSY (sv))	188	if (!SvPADBUSY (sv))
		189	#endif
135	SvPADMY_on (sv);	190	SvPADMY_on (sv);
136	npad[ix] = sv;	191	npad[ix] = sv;
137	}	192	}
138	}	193	}
139	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	194	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
…		…
169	#endif	224	#endif
170		225
171	return newpadlist;	226	return newpadlist;
172	}	227	}
173		228
174	#ifdef MAY_FLUSH	229	STATIC void
175	STATIC AV *
176	free_padlist (AV *padlist)	230	free_padlist (AV *padlist)
177	{	231	{
178	/* may be during global destruction */	232	/* may be during global destruction */
179	if (SvREFCNT(padlist))	233	if (SvREFCNT (padlist))
180	{	234	{
181	I32 i = AvFILLp(padlist);	235	I32 i = AvFILLp (padlist);
182	while (i >= 0)	236	while (i >= 0)
183	{	237	{
184	SV **svp = av_fetch(padlist, i--, FALSE);	238	SV **svp = av_fetch (padlist, i--, FALSE);
185	SV sv = svp ? svp : Nullsv;
186	if (sv)	239	if (svp)
		240	{
		241	SV *sv;
		242	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
187	SvREFCNT_dec(sv);	243	SvREFCNT_dec (sv);
		244
		245	SvREFCNT_dec (*svp);
		246	}
188	}	247	}
189		248
190	SvREFCNT_dec((SV*)padlist);	249	SvREFCNT_dec ((SV*)padlist);
191	}	250	}
192	}	251	}
193	#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};
194		267
195	/* the next two functions merely cache the padlists */	268	/* the next two functions merely cache the padlists */
196	STATIC void	269	STATIC void
197	get_padlist (CV *cv)	270	get_padlist (CV *cv)
198	{	271	{
199	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	272	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
200		273
201	if (he && AvFILLp ((AV )he) >= 0)	274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
202	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	275	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);
203	else	276	else
204	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
205	}	278	}
206		279
207	STATIC void	280	STATIC void
208	put_padlist (CV *cv)	281	put_padlist (CV *cv)
209	{	282	{
210	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);	283	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
211		284
212	if (SvTYPE (*he) != SVt_PVAV)	285	if (!mg)
213	{	286	{
214	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;
215	he = (SV )newAV ();	290	mg->mg_obj = (SV *)newAV ();
216	}	291	}
217		292
218	av_push ((AV )he, (SV *)CvPADLIST (cv));	293	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));
219	}	294	}
220
221	#ifdef MAY_FLUSH
222	STATIC void
223	flush_padlist_cache ()
224	{
225	HV *hv = padlist_cache;
226	padlist_cache = newHV ();
227
228	if (hv_iterinit (hv))
229	{
230	HE *he;
231	AV *padlist;
232
233	while (!!(he = hv_iternext (hv)))
234	{
235	AV av = (AV )HeVAL(he);
236
237	/* casting is fun. */
238	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
239	free_padlist (padlist);
240	}
241	}
242
243	SvREFCNT_dec (hv);
244	}
245	#endif
246		295
247	#define SB do {	296	#define SB do {
248	#define SE } while (0)	297	#define SE } while (0)
249		298
250	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	299	#define LOAD(state) load_state(aTHX_ (state));
251	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
252		301
253	#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
254		303
255	static void	304	static void
256	load_state(pTHX_ Coro__State c)	305	load_state(pTHX_ Coro__State c)
257	{	306	{
258	PL_dowarn = c->dowarn;	307	PL_dowarn = c->dowarn;
		308	PL_in_eval = c->in_eval;
259		309
260	PL_curstackinfo = c->curstackinfo;	310	PL_curstackinfo = c->curstackinfo;
261	PL_curstack = c->curstack;	311	PL_curstack = c->curstack;
262	PL_mainstack = c->mainstack;	312	PL_mainstack = c->mainstack;
263	PL_stack_sp = c->stack_sp;	313	PL_stack_sp = c->stack_sp;
264	PL_op = c->op;	314	PL_op = c->op;
265	PL_curpad = c->curpad;	315	PL_curpad = c->curpad;
		316	PL_comppad = c->comppad;
266	PL_stack_base = c->stack_base;	317	PL_stack_base = c->stack_base;
267	PL_stack_max = c->stack_max;	318	PL_stack_max = c->stack_max;
268	PL_tmps_stack = c->tmps_stack;	319	PL_tmps_stack = c->tmps_stack;
269	PL_tmps_floor = c->tmps_floor;	320	PL_tmps_floor = c->tmps_floor;
270	PL_tmps_ix = c->tmps_ix;	321	PL_tmps_ix = c->tmps_ix;
…		…
280	PL_savestack_max = c->savestack_max;	331	PL_savestack_max = c->savestack_max;
281	PL_retstack = c->retstack;	332	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;	333	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;	334	PL_retstack_max = c->retstack_max;
284	PL_curcop = c->curcop;	335	PL_curcop = c->curcop;
285	PL_start_env = c->start_env;
286	PL_top_env = c->top_env;	336	PL_top_env = c->top_env;
287		337
288	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
289	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
290	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
330		380
331	PUSHs (Nullsv);	381	PUSHs (Nullsv);
332	/* this loop was inspired by pp_caller */	382	/* this loop was inspired by pp_caller */
333	for (;;)	383	for (;;)
334	{	384	{
335	do	385	while (cxix >= 0)
336	{	386	{
337	PERL_CONTEXT *cx = &ccstk[cxix--];	387	PERL_CONTEXT *cx = &ccstk[cxix--];
338		388
339	if (CxTYPE(cx) == CXt_SUB)	389	if (CxTYPE(cx) == CXt_SUB)
340	{	390	{
…		…
359	PUSHs ((SV *)cv);	409	PUSHs ((SV *)cv);
360		410
361	get_padlist (cv); /* this is a monster */	411	get_padlist (cv); /* this is a monster */
362	}	412	}
363	}	413	}
		414	#ifdef CXt_FORMAT
364	else if (CxTYPE(cx) == CXt_FORMAT)	415	else if (CxTYPE(cx) == CXt_FORMAT)
365	{	416	{
366	/* 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? */
367	/* my bold guess is as a simple, plain sub... */	418	/* my bold guess is as a simple, plain sub... */
368	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");
369	}	420	}
		421	#endif
370	}	422	}
371	while (cxix >= 0);
372		423
373	if (top_si->si_type == PERLSI_MAIN)	424	if (top_si->si_type == PERLSI_MAIN)
374	break;	425	break;
375		426
376	top_si = top_si->si_prev;	427	top_si = top_si->si_prev;
…		…
383		434
384	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
385	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
386	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
387		438
388	/* I have not the slightest idea of why av_reify is necessary */
389	/* but if it's missing the defav contents magically get replaced sometimes */
390	if (c->defav)
391	av_reify (c->defav);
392
393	c->dowarn = PL_dowarn;	439	c->dowarn = PL_dowarn;
		440	c->in_eval = PL_in_eval;
394		441
395	c->curstackinfo = PL_curstackinfo;	442	c->curstackinfo = PL_curstackinfo;
396	c->curstack = PL_curstack;	443	c->curstack = PL_curstack;
397	c->mainstack = PL_mainstack;	444	c->mainstack = PL_mainstack;
398	c->stack_sp = PL_stack_sp;	445	c->stack_sp = PL_stack_sp;
399	c->op = PL_op;	446	c->op = PL_op;
400	c->curpad = PL_curpad;	447	c->curpad = PL_curpad;
		448	c->comppad = PL_comppad;
401	c->stack_base = PL_stack_base;	449	c->stack_base = PL_stack_base;
402	c->stack_max = PL_stack_max;	450	c->stack_max = PL_stack_max;
403	c->tmps_stack = PL_tmps_stack;	451	c->tmps_stack = PL_tmps_stack;
404	c->tmps_floor = PL_tmps_floor;	452	c->tmps_floor = PL_tmps_floor;
405	c->tmps_ix = PL_tmps_ix;	453	c->tmps_ix = PL_tmps_ix;
…		…
415	c->savestack_max = PL_savestack_max;	463	c->savestack_max = PL_savestack_max;
416	c->retstack = PL_retstack;	464	c->retstack = PL_retstack;
417	c->retstack_ix = PL_retstack_ix;	465	c->retstack_ix = PL_retstack_ix;
418	c->retstack_max = PL_retstack_max;	466	c->retstack_max = PL_retstack_max;
419	c->curcop = PL_curcop;	467	c->curcop = PL_curcop;
420	c->start_env = PL_start_env;
421	c->top_env = PL_top_env;	468	c->top_env = PL_top_env;
422	}	469	}
423		470
424	/*	471	/*
425	* allocate various perl stacks. This is an exact copy	472	* allocate various perl stacks. This is an exact copy
…		…
437		484
438	PL_stack_base = AvARRAY(PL_curstack);	485	PL_stack_base = AvARRAY(PL_curstack);
439	PL_stack_sp = PL_stack_base;	486	PL_stack_sp = PL_stack_base;
440	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	487	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
441		488
442	New(50,PL_tmps_stack,64,SV*);	489	New(50,PL_tmps_stack,96,SV*);
443	PL_tmps_floor = -1;	490	PL_tmps_floor = -1;
444	PL_tmps_ix = -1;	491	PL_tmps_ix = -1;
445	PL_tmps_max = 64;	492	PL_tmps_max = 96;
446		493
447	New(54,PL_markstack,12,I32);	494	New(54,PL_markstack,16,I32);
448	PL_markstack_ptr = PL_markstack;	495	PL_markstack_ptr = PL_markstack;
449	PL_markstack_max = PL_markstack + 12;	496	PL_markstack_max = PL_markstack + 16;
450		497
		498	#ifdef SET_MARK_OFFSET
451	SET_MARK_OFFSET;	499	SET_MARK_OFFSET;
		500	#endif
452		501
453	New(54,PL_scopestack,12,I32);	502	New(54,PL_scopestack,16,I32);
454	PL_scopestack_ix = 0;	503	PL_scopestack_ix = 0;
455	PL_scopestack_max = 12;	504	PL_scopestack_max = 16;
456		505
457	New(54,PL_savestack,64,ANY);	506	New(54,PL_savestack,96,ANY);
458	PL_savestack_ix = 0;	507	PL_savestack_ix = 0;
459	PL_savestack_max = 64;	508	PL_savestack_max = 96;
460		509
461	New(54,PL_retstack,8,OP*);	510	New(54,PL_retstack,8,OP*);
462	PL_retstack_ix = 0;	511	PL_retstack_ix = 0;
463	PL_retstack_max = 8;	512	PL_retstack_max = 8;
464	}	513	}
465		514
466	/*	515	/*
467	* destroy the stacks, the callchain etc...	516	* destroy the stacks, the callchain etc...
468	* still there is a memleak of 128 bytes...
469	*/	517	*/
470	STATIC void	518	STATIC void
471	destroy_stacks(pTHX)	519	destroy_stacks(pTHX)
472	{	520	{
		521	if (!IN_DESTRUCT)
		522	{
473	/* is this ugly, I ask? */	523	/* is this ugly, I ask? */
474	while (PL_scopestack_ix)	524	while (PL_scopestack_ix)
475	LEAVE;	525	LEAVE;
476		526
477	/* sure it is, but more important: is it correct?? :/ */	527	/* sure it is, but more important: is it correct?? :/ */
478	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */	528	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
479	FREETMPS;	529	FREETMPS;
		530	}
480		531
481	while (PL_curstackinfo->si_next)	532	while (PL_curstackinfo->si_next)
482	PL_curstackinfo = PL_curstackinfo->si_next;	533	PL_curstackinfo = PL_curstackinfo->si_next;
483		534
484	while (PL_curstackinfo)	535	while (PL_curstackinfo)
…		…
489	dSP;	540	dSP;
490	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	541	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
491	PUTBACK; /* possibly superfluous */	542	PUTBACK; /* possibly superfluous */
492	}	543	}
493		544
		545	if (!IN_DESTRUCT)
		546	{
494	dounwind(-1);	547	dounwind(-1);
495
496	SvREFCNT_dec(PL_curstackinfo->si_stack);	548	SvREFCNT_dec(PL_curstackinfo->si_stack);
		549	}
		550
497	Safefree(PL_curstackinfo->si_cxstack);	551	Safefree(PL_curstackinfo->si_cxstack);
498	Safefree(PL_curstackinfo);	552	Safefree(PL_curstackinfo);
499	PL_curstackinfo = p;	553	PL_curstackinfo = p;
500	}	554	}
501		555
…		…
505	Safefree(PL_savestack);	559	Safefree(PL_savestack);
506	Safefree(PL_retstack);	560	Safefree(PL_retstack);
507	}	561	}
508		562
509	static void	563	static void
510	allocate_stack (Coro__State ctx)	564	allocate_stack (Coro__State ctx, int alloc)
511	{	565	{
		566	coro_stack *stack;
		567
		568	New (0, stack, 1, coro_stack);
		569
		570	stack->refcnt = 1;
		571	stack->usecnt = 1;
		572	stack->gencnt = ctx->gencnt = 0;
		573	if (alloc)
		574	{
512	#ifdef HAVE_MMAP	575	#if HAVE_MMAP
513	ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */	576	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
514	ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);	577	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
515	if (ctx->sptr == (void *)-1)	578	if (stack->sptr == (void *)-1)
516	#endif	579	#endif
517	{	580	{
518	/FIXME//D//* reasonable stack size! */	581	/FIXME//D//* reasonable stack size! */
519	ctx->ssize = 4096 * sizeof (long);	582	stack->ssize = -4096 * sizeof (long);
520	New (0, ctx->sptr, 4096, long);	583	New (0, stack->sptr, 4096, long);
		584	}
521	}	585	}
		586	else
		587	stack->sptr = 0;
		588
		589	ctx->stack = stack;
522	}	590	}
523		591
524	static void	592	static void
525	deallocate_stack (Coro__State ctx)	593	deallocate_stack (Coro__State ctx)
526	{	594	{
		595	coro_stack *stack = ctx->stack;
		596
		597	ctx->stack = 0;
		598
		599	if (stack)
		600	{
		601	if (!--stack->refcnt)
		602	{
527	#ifdef HAVE_MMAP	603	#ifdef HAVE_MMAP
528	munmap (ctx->sptr, ctx->ssize);	604	if (stack->ssize > 0 && stack->sptr)
529	#else	605	munmap (stack->sptr, stack->ssize);
530	Safefree (ctx->sptr);	606	else
531	#endif	607	#endif
532	}	608	Safefree (stack->sptr);
533		609
534	/* might go away together with optional SAVE_CCTXT */	610	Safefree (stack);
		611	}
		612	else if (ctx->gencnt == stack->gencnt)
		613	--stack->usecnt;
		614	}
		615	}
		616
535	static void	617	static void
536	setup_coro (void *arg)	618	setup_coro (void *arg)
537	{	619	{
538	/*	620	/*
539	* emulate part of the perl startup here.	621	* emulate part of the perl startup here.
…		…
541	dSP;	623	dSP;
542	Coro__State ctx = (Coro__State)arg;	624	Coro__State ctx = (Coro__State)arg;
543	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	625	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
544		626
545	coro_init_stacks (aTHX);	627	coro_init_stacks (aTHX);
546	JMPENV_BOOTSTRAP;	628	/PL_curcop = 0;/
		629	/PL_in_eval = PL_in_eval;/ /* inherit */
		630	SvREFCNT_dec (GvAV (PL_defgv));
		631	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
		632
547	SPAGAIN;	633	SPAGAIN;
548		634
549	/PL_curcop = 0;/
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = ctx->args;
552
553	if (ctx->sptr)	635	if (ctx->stack)
554	{	636	{
		637	ctx->cursp = 0;
		638
555	PUSHMARK(SP);	639	PUSHMARK(SP);
556	PUTBACK;	640	PUTBACK;
557	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	641	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		642
		643	if (SvTRUE (ERRSV))
		644	croak (NULL);
		645	else
558	croak ("FATAL: CCTXT coroutine returned!");	646	croak ("FATAL: CCTXT coroutine returned!");
559	}	647	}
560	else	648	else
561	{	649	{
562	UNOP myop;	650	UNOP myop;
563		651
…		…
575	* that doesn't matter, though, since it is only	663	* that doesn't matter, though, since it is only
576	* pp_nextstate and we never return...	664	* pp_nextstate and we never return...
577	* ah yes, and I don't care anyways ;)	665	* ah yes, and I don't care anyways ;)
578	*/	666	*/
579	PUTBACK;	667	PUTBACK;
580	PL_op = pp_entersub();	668	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
581	SPAGAIN;	669	SPAGAIN;
582		670
583	ENTER; /* necessary e.g. for dounwind */	671	ENTER; /* necessary e.g. for dounwind */
584	}	672	}
585	}	673	}
586		674
		675	static void
		676	continue_coro (void *arg)
		677	{
		678	/*
		679	* this is a _very_ stripped down perl interpreter ;)
		680	*/
		681	Coro__State ctx = (Coro__State)arg;
		682	JMPENV coro_start_env;
		683
		684	PL_top_env = &ctx->start_env;
		685
		686	ctx->cursp = 0;
		687	PL_op = PL_op->op_next;
		688	CALLRUNOPS(aTHX);
		689
		690	abort ();
		691	}
		692
587	STATIC void	693	STATIC void
588	transfer(pTHX_ struct coro prev, struct coro next, int flags)	694	transfer(pTHX_ struct coro prev, struct coro next, int flags)
589	{	695	{
590	dSP;	696	dSTACKLEVEL;
		697	static struct coro *xnext;
591		698
592	if (prev != next)	699	if (prev != next)
593	{	700	{
594	/*	701	xnext = next;
595	* this could be done in newprocess which would lead to	702
596	* extremely elegant and fast (basically just SAVE/LOAD)
597	* code here, but lazy allocation of stacks has also
598	* some virtues and the overhead of the if() is nil.
599	*/
600	if (next->mainstack)	703	if (next->mainstack)
601	{	704	{
602	SAVE (prev, flags);	705	SAVE (prev, flags);
603	LOAD (next);	706	LOAD (next);
604		707
605	/* mark this state as in-use */	708	/* mark this state as in-use */
606	next->mainstack = 0;	709	next->mainstack = 0;
607	next->tmps_ix = -2;	710	next->tmps_ix = -2;
608		711
		712	/* stacklevel changed? if yes, grab the stack for us! */
609	if (flags & TRANSFER_SAVE_CCTXT)	713	if (flags & TRANSFER_SAVE_CCTXT)
610	{	714	{
611	if (!next->ssize)
612	croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
613
614	if (!prev->ssize)	715	if (!prev->stack)
615	prev->ssize = 1; /* mark cctx as valid ;) */	716	allocate_stack (prev, 0);
		717	else if (prev->cursp != stacklevel
		718	&& prev->stack->usecnt > 1)
		719	{
		720	prev->gencnt = ++prev->stack->gencnt;
		721	prev->stack->usecnt = 1;
		722	}
616		723
		724	/* has our stack been invalidated? */
		725	if (next->stack && next->stack->gencnt != next->gencnt)
		726	{
		727	deallocate_stack (next);
		728	allocate_stack (next, 1);
		729	coro_create (&(next->stack->cctx),
		730	continue_coro, (void *)next,
		731	next->stack->sptr, labs (next->stack->ssize));
		732	}
		733
617	coro_transfer (&(prev->cctx), &(next->cctx));	734	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		735	/* don't add any code here */
618	}	736	}
619		737
620	}	738	}
621	else if (next->tmps_ix == -2)	739	else if (next->tmps_ix == -2)
622	croak ("tried to transfer to running coroutine");	740	croak ("tried to transfer to running coroutine");
…		…
624	{	742	{
625	SAVE (prev, -1); /* first get rid of the old state */	743	SAVE (prev, -1); /* first get rid of the old state */
626		744
627	if (flags & TRANSFER_SAVE_CCTXT)	745	if (flags & TRANSFER_SAVE_CCTXT)
628	{	746	{
629	if (!next->ssize)	747	if (!prev->stack)
		748	allocate_stack (prev, 0);
		749
		750	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
630	{	751	{
		752	PL_top_env = &next->start_env;
		753
		754	setup_coro (next);
		755
		756	prev->stack->refcnt++;
		757	prev->stack->usecnt++;
		758	next->stack = prev->stack;
		759	next->gencnt = prev->gencnt;
		760	}
		761	else
		762	{
		763	assert (!next->stack);
631	allocate_stack (next);	764	allocate_stack (next, 1);
632	coro_create (&(next->cctx),	765	coro_create (&(next->stack->cctx),
633	setup_coro, (void *)next,	766	setup_coro, (void *)next,
634	next->sptr, next->ssize);	767	next->stack->sptr, labs (next->stack->ssize));
		768	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		769	/* don't add any code here */
635	}	770	}
636
637	if (!prev->ssize)
638	prev->ssize = 1; /* mark cctx as valid ;) */
639
640	coro_transfer (&(prev->cctx), &(next->cctx));
641	}	771	}
642	else	772	else
643	setup_coro (next);	773	setup_coro (next);
644	}	774	}
		775
		776	/*
		777	* xnext is now either prev or next, depending on wether
		778	* we switched the c stack or not. that's why I use a global
		779	* variable, that should become thread-specific at one point.
		780	*/
		781	xnext->cursp = stacklevel;
645	}	782	}
		783
		784	if (coro_mortal)
		785	{
		786	SvREFCNT_dec (coro_mortal);
		787	coro_mortal = 0;
		788	}
		789	}
		790
		791	#define SV_CORO(sv,func) \
		792	do { \
		793	if (SvROK (sv)) \
		794	sv = SvRV (sv); \
		795	\
		796	if (SvTYPE(sv) == SVt_PVHV) \
		797	{ \
		798	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		799	\
		800	if (!he) \
		801	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		802	\
		803	(sv) = SvRV (HeVAL(he)); \
		804	} \
		805	\
		806	/* must also be changed inside Coro::Cont::yield */ \
		807	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
		808	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		809	\
		810	} while(0)
		811
		812	#define SvSTATE(sv) (struct coro *)SvIV (sv)
		813
		814	static void
		815	api_transfer(pTHX_ SV prev, SV next, int flags)
		816	{
		817	SV_CORO (prev, "Coro::transfer");
		818	SV_CORO (next, "Coro::transfer");
		819
		820	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
		821	}
		822
		823	/ Coro ******************************************************************/
		824
		825	#define PRIO_MAX 3
		826	#define PRIO_HIGH 1
		827	#define PRIO_NORMAL 0
		828	#define PRIO_LOW -1
		829	#define PRIO_IDLE -3
		830	#define PRIO_MIN -4
		831
		832	/* for Coro.pm */
		833	static GV coro_current, coro_idle;
		834	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		835	static int coro_nready;
		836
		837	static void
		838	coro_enq (SV *sv)
		839	{
		840	if (SvTYPE (sv) == SVt_PVHV)
		841	{
		842	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
		843	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		844
		845	prio = prio > PRIO_MAX ? PRIO_MAX
		846	: prio < PRIO_MIN ? PRIO_MIN
		847	: prio;
		848
		849	av_push (coro_ready [prio - PRIO_MIN], sv);
		850	coro_nready++;
		851
		852	return;
		853	}
		854
		855	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		856	}
		857
		858	static SV *
		859	coro_deq (int min_prio)
		860	{
		861	int prio = PRIO_MAX - PRIO_MIN;
		862
		863	min_prio -= PRIO_MIN;
		864	if (min_prio < 0)
		865	min_prio = 0;
		866
		867	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		868	if (av_len (coro_ready[prio]) >= 0)
		869	{
		870	coro_nready--;
		871	return av_shift (coro_ready[prio]);
		872	}
		873
		874	return 0;
		875	}
		876
		877	static void
		878	api_ready (SV *coro)
		879	{
		880	if (SvROK (coro))
		881	coro = SvRV (coro);
		882
		883	coro_enq (SvREFCNT_inc (coro));
		884	}
		885
		886	static void
		887	api_schedule (void)
		888	{
		889	SV prev, next;
		890
		891	prev = SvRV (GvSV (coro_current));
		892	next = coro_deq (PRIO_MIN);
		893
		894	if (!next)
		895	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		896
		897	/* free this only after the transfer */
		898	coro_mortal = prev;
		899	SV_CORO (prev, "Coro::schedule");
		900
		901	SvRV (GvSV (coro_current)) = next;
		902
		903	SV_CORO (next, "Coro::schedule");
		904
		905	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		906	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		907	}
		908
		909	static void
		910	api_cede (void)
		911	{
		912	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		913
		914	api_schedule ();
646	}	915	}
647		916
648	MODULE = Coro::State PACKAGE = Coro::State	917	MODULE = Coro::State PACKAGE = Coro::State
649		918
650	PROTOTYPES: ENABLE	919	PROTOTYPES: ENABLE
…		…
662		931
663	if (!padlist_cache)	932	if (!padlist_cache)
664	padlist_cache = newHV ();	933	padlist_cache = newHV ();
665		934
666	main_mainstack = PL_mainstack;	935	main_mainstack = PL_mainstack;
		936
		937	coroapi.ver = CORO_API_VERSION;
		938	coroapi.transfer = api_transfer;
667	}	939	}
668		940
669	Coro::State	941	Coro::State
670	_newprocess(args)	942	_newprocess(args)
671	SV * args	943	SV * args
…		…
674	Coro__State coro;	946	Coro__State coro;
675		947
676	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	948	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
677	croak ("Coro::State::_newprocess expects an arrayref");	949	croak ("Coro::State::_newprocess expects an arrayref");
678		950
679	New (0, coro, 1, struct coro);	951	Newz (0, coro, 1, struct coro);
680		952
681	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
682	coro->mainstack = 0; /* actual work is done inside transfer */	954	coro->mainstack = 0; /* actual work is done inside transfer */
683	coro->sptr = 0;	955	coro->stack = 0;
684	coro->ssize = 0;	956
		957	/* same as JMPENV_BOOTSTRAP */
		958	/* we might be able to recycle start_env, but safe is safe */
		959	//Zero(&coro->start_env, 1, JMPENV);
		960	coro->start_env.je_ret = -1;
		961	coro->start_env.je_mustcatch = TRUE;
685		962
686	RETVAL = coro;	963	RETVAL = coro;
687	OUTPUT:	964	OUTPUT:
688	RETVAL	965	RETVAL
689		966
690	void	967	void
691	transfer(prev, next, flags = TRANSFER_SAVE_ALL)	968	transfer(prev, next, flags)
692	Coro::State_or_hashref prev	969	SV *prev
693	Coro::State_or_hashref next	970	SV *next
694	int flags	971	int flags
695	PROTOTYPE: @	972	PROTOTYPE: @
696	CODE:	973	CODE:
		974	PUTBACK;
		975	SV_CORO (next, "Coro::transfer");
		976	SV_CORO (prev, "Coro::transfer");
697	transfer (aTHX_ prev, next, flags);	977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		978	SPAGAIN;
698		979
699	void	980	void
700	DESTROY(coro)	981	DESTROY(coro)
701	Coro::State coro	982	Coro::State coro
702	CODE:	983	CODE:
703		984
704	if (coro->mainstack && coro->mainstack != main_mainstack)	985	if (coro->mainstack && coro->mainstack != main_mainstack)
705	{	986	{
706	struct coro temp;	987	struct coro temp;
707		988
		989	PUTBACK;
708	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	990	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
709	LOAD(aTHX_ coro);	991	LOAD(aTHX_ coro);
		992	SPAGAIN;
710		993
711	destroy_stacks (aTHX);	994	destroy_stacks (aTHX);
712		995
713	LOAD((&temp)); /* this will get rid of defsv etc.. */	996	LOAD((&temp)); /* this will get rid of defsv etc.. */
		997	SPAGAIN;
714		998
715	coro->mainstack = 0;	999	coro->mainstack = 0;
716	}	1000	}
717		1001
718	if (coro->sptr)
719	{
720	deallocate_stack (coro);	1002	deallocate_stack (coro);
721	coro->sptr = 0;	1003	SvREFCNT_dec (coro->args);
722	}
723
724	Safefree (coro);	1004	Safefree (coro);
725		1005
726	void	1006	void
727	flush()	1007	_exit(code)
		1008	int code
		1009	PROTOTYPE: $
728	CODE:	1010	CODE:
729	#ifdef MAY_FLUSH	1011	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
730	flush_padlist_cache ();	1012	_exit (code);
		1013	#else
		1014	signal (SIGTERM, SIG_DFL);
		1015	raise (SIGTERM);
		1016	exit (code);
731	#endif	1017	#endif
732		1018
733	MODULE = Coro::State PACKAGE = Coro::Cont	1019	MODULE = Coro::State PACKAGE = Coro::Cont
734		1020
735	# this is slightly dirty	1021	# this is slightly dirty (should expose a c-level api)
736		1022
737	void	1023	void
738	yield(...)	1024	yield(...)
739	PROTOTYPE: @	1025	PROTOTYPE: @
740	CODE:	1026	CODE:
…		…
742	SV *sv;	1028	SV *sv;
743	AV *defav = GvAV (PL_defgv);	1029	AV *defav = GvAV (PL_defgv);
744	struct coro prev, next;	1030	struct coro prev, next;
745		1031
746	if (!returnstk)	1032	if (!returnstk)
747	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1033	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
748		1034
749	/* set up @_ -- ugly */	1035	/* set up @_ -- ugly */
750	av_clear (defav);	1036	av_clear (defav);
751	av_fill (defav, items - 1);	1037	av_fill (defav, items - 1);
752	while (items--)	1038	while (items--)
…		…
758	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1044	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
759	SvREFCNT_dec (sv);	1045	SvREFCNT_dec (sv);
760		1046
761	transfer(aTHX_ prev, next, 0);	1047	transfer(aTHX_ prev, next, 0);
762		1048
		1049	MODULE = Coro::State PACKAGE = Coro
		1050
		1051	# this is slightly dirty (should expose a c-level api)
		1052
		1053	BOOT:
		1054	{
		1055	int i;
		1056	HV *stash = gv_stashpv ("Coro", TRUE);
		1057
		1058	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1059	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1060	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1061	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1062	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1063	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1064
		1065	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1066	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1067
		1068	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1069	coro_ready[i] = newAV ();
		1070
		1071	{
		1072	SV *sv = perl_get_sv("Coro::API", 1);
		1073
		1074	coroapi.schedule = api_schedule;
		1075	coroapi.cede = api_cede;
		1076	coroapi.ready = api_ready;
		1077	coroapi.nready = &coro_nready;
		1078	coroapi.current = coro_current;
		1079
		1080	GCoroAPI = &coroapi;
		1081	sv_setiv(sv, (IV)&coroapi);
		1082	SvREADONLY_on(sv);
		1083	}
		1084	}
		1085
		1086	#if !PERL_MICRO
		1087
		1088	void
		1089	ready(self)
		1090	SV * self
		1091	PROTOTYPE: $
		1092	CODE:
		1093	api_ready (self);
		1094
		1095	#endif
		1096
		1097	int
		1098	nready(...)
		1099	PROTOTYPE:
		1100	CODE:
		1101	RETVAL = coro_nready;
		1102	OUTPUT:
		1103	RETVAL
		1104
		1105	void
		1106	schedule(...)
		1107	PROTOTYPE:
		1108	CODE:
		1109	api_schedule ();
		1110
		1111	void
		1112	cede(...)
		1113	PROTOTYPE:
		1114	CODE:
		1115	api_cede ();
		1116

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Comparing Coro/Coro/State.xs (file contents): Revision 1.14 by root, Mon Jul 23 23:48:05 2001 UTC vs. Revision 1.50 by pcg, Sun Nov 30 16:59:15 2003 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.14 by root, Mon Jul 23 23:48:05 2001 UTC vs.
Revision 1.50 by pcg, Sun Nov 30 16:59:15 2003 UTC