[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 1.54 by pcg, Sat Mar 13 06:45:04 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	#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 (pTHX_ 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
426	* of perl.c:init_stacks, except that it uses less memory	473	* of perl.c:init_stacks, except that it uses less memory
427	* on the assumption that coroutines do not usually need	474	* on the (sometimes correct) assumption that coroutines do
428	* a lot of stackspace.	475	* not usually need a lot of stackspace.
429	*/	476	*/
430	STATIC void	477	STATIC void
431	coro_init_stacks (pTHX)	478	coro_init_stacks (pTHX)
432	{	479	{
433	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
…		…
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	LEAVE_SCOPE (0);
475	LEAVE;
476		525
477	/* sure it is, but more important: is it correct?? :/ */	526	/* sure it is, but more important: is it correct?? :/ */
478	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
479	FREETMPS;	527	FREETMPS;
		528	}
480		529
481	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
482	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
483		532
484	while (PL_curstackinfo)	533	while (PL_curstackinfo)
…		…
489	dSP;	538	dSP;
490	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	539	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
491	PUTBACK; /* possibly superfluous */	540	PUTBACK; /* possibly superfluous */
492	}	541	}
493		542
		543	if (!IN_DESTRUCT)
		544	{
494	dounwind(-1);	545	dounwind(-1);
495
496	SvREFCNT_dec(PL_curstackinfo->si_stack);	546	SvREFCNT_dec(PL_curstackinfo->si_stack);
		547	}
		548
497	Safefree(PL_curstackinfo->si_cxstack);	549	Safefree(PL_curstackinfo->si_cxstack);
498	Safefree(PL_curstackinfo);	550	Safefree(PL_curstackinfo);
499	PL_curstackinfo = p;	551	PL_curstackinfo = p;
500	}	552	}
501		553
…		…
505	Safefree(PL_savestack);	557	Safefree(PL_savestack);
506	Safefree(PL_retstack);	558	Safefree(PL_retstack);
507	}	559	}
508		560
509	static void	561	static void
510	allocate_stack (Coro__State ctx)	562	allocate_stack (Coro__State ctx, int alloc)
511	{	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	{
512	#ifdef HAVE_MMAP	573	#if HAVE_MMAP
513	ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */	574	stack->ssize = 16384 * 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);	575	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
515	if (ctx->sptr == (void *)-1)	576	if (stack->sptr == (void *)-1)
516	#endif	577	#endif
517	{	578	{
518	/FIXME//D//* reasonable stack size! */	579	/FIXME//D//* reasonable stack size! */
519	ctx->ssize = 4096 * sizeof (long);	580	stack->ssize = - (8192 * sizeof (long));
520	New (0, ctx->sptr, 4096, long);	581	New (0, stack->sptr, 8192, long);
		582	}
521	}	583	}
		584	else
		585	stack->sptr = 0;
		586
		587	ctx->stack = stack;
522	}	588	}
523		589
524	static void	590	static void
525	deallocate_stack (Coro__State ctx)	591	deallocate_stack (Coro__State ctx)
526	{	592	{
		593	coro_stack *stack = ctx->stack;
		594
		595	ctx->stack = 0;
		596
		597	if (stack)
		598	{
		599	if (!--stack->refcnt)
		600	{
527	#ifdef HAVE_MMAP	601	#ifdef HAVE_MMAP
528	munmap (ctx->sptr, ctx->ssize);	602	if (stack->ssize > 0 && stack->sptr)
529	#else	603	munmap (stack->sptr, stack->ssize);
530	Safefree (ctx->sptr);	604	else
531	#endif	605	#endif
532	}	606	Safefree (stack->sptr);
533		607
534	/* might go away together with optional SAVE_CCTXT */	608	Safefree (stack);
		609	}
		610	else if (ctx->gencnt == stack->gencnt)
		611	--stack->usecnt;
		612	}
		613	}
		614
535	static void	615	static void
536	setup_coro (void *arg)	616	setup_coro (void *arg)
537	{	617	{
538	/*	618	/*
539	* emulate part of the perl startup here.	619	* emulate part of the perl startup here.
540	*/	620	*/
541	dSP;	621	dSP;
542	Coro__State ctx = (Coro__State)arg;	622	Coro__State ctx = (Coro__State)arg;
543	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	623	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
544		624
545	coro_init_stacks (aTHX);	625	coro_init_stacks (aTHX);
546	JMPENV_BOOTSTRAP;	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
547	SPAGAIN;	631	SPAGAIN;
548		632
549	/PL_curcop = 0;/
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = ctx->args;
552
553	if (ctx->sptr)	633	if (ctx->stack)
554	{	634	{
		635	ctx->cursp = 0;
		636
555	PUSHMARK(SP);	637	PUSHMARK(SP);
556	PUTBACK;	638	PUTBACK;
557	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	639	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		640
		641	if (SvTRUE (ERRSV))
		642	croak (NULL);
		643	else
558	croak ("FATAL: CCTXT coroutine returned!");	644	croak ("FATAL: CCTXT coroutine returned!");
559	}	645	}
560	else	646	else
561	{	647	{
562	UNOP myop;	648	UNOP myop;
563		649
…		…
575	* that doesn't matter, though, since it is only	661	* that doesn't matter, though, since it is only
576	* pp_nextstate and we never return...	662	* pp_nextstate and we never return...
577	* ah yes, and I don't care anyways ;)	663	* ah yes, and I don't care anyways ;)
578	*/	664	*/
579	PUTBACK;	665	PUTBACK;
580	PL_op = pp_entersub();	666	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
581	SPAGAIN;	667	SPAGAIN;
582		668
583	ENTER; /* necessary e.g. for dounwind */	669	ENTER; /* necessary e.g. for dounwind */
584	}	670	}
585	}	671	}
586		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
587	STATIC void	691	STATIC void
588	transfer(pTHX_ struct coro prev, struct coro next, int flags)	692	transfer(pTHX_ struct coro prev, struct coro next, int flags)
589	{	693	{
590	dSP;	694	dSTACKLEVEL;
		695	static struct coro *xnext;
591		696
592	if (prev != next)	697	if (prev != next)
593	{	698	{
594	/*	699	xnext = next;
595	* this could be done in newprocess which would lead to	700
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)	701	if (next->mainstack)
601	{	702	{
602	SAVE (prev, flags);	703	SAVE (prev, flags);
603	LOAD (next);	704	LOAD (next);
604		705
605	/* mark this state as in-use */	706	/* mark this state as in-use */
606	next->mainstack = 0;	707	next->mainstack = 0;
607	next->tmps_ix = -2;	708	next->tmps_ix = -2;
608		709
		710	/* stacklevel changed? if yes, grab the stack for us! */
609	if (flags & TRANSFER_SAVE_CCTXT)	711	if (flags & TRANSFER_SAVE_CCTXT)
610	{	712	{
611	if (!next->ssize)
612	croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
613
614	if (!prev->ssize)	713	if (!prev->stack)
615	prev->ssize = 1; /* mark cctx as valid ;) */	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	}
616		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
617	coro_transfer (&(prev->cctx), &(next->cctx));	732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		733	/* don't add any code here */
618	}	734	}
619		735
620	}	736	}
621	else if (next->tmps_ix == -2)	737	else if (next->tmps_ix == -2)
622	croak ("tried to transfer to running coroutine");	738	croak ("tried to transfer to running coroutine");
…		…
624	{	740	{
625	SAVE (prev, -1); /* first get rid of the old state */	741	SAVE (prev, -1); /* first get rid of the old state */
626		742
627	if (flags & TRANSFER_SAVE_CCTXT)	743	if (flags & TRANSFER_SAVE_CCTXT)
628	{	744	{
629	if (!next->ssize)	745	if (!prev->stack)
		746	allocate_stack (prev, 0);
		747
		748	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
630	{	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);
631	allocate_stack (next);	762	allocate_stack (next, 1);
632	coro_create (&(next->cctx),	763	coro_create (&(next->stack->cctx),
633	setup_coro, (void *)next,	764	setup_coro, (void *)next,
634	next->sptr, next->ssize);	765	next->stack->sptr, labs (next->stack->ssize));
		766	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		767	/* don't add any code here */
635	}	768	}
636
637	if (!prev->ssize)
638	prev->ssize = 1; /* mark cctx as valid ;) */
639
640	coro_transfer (&(prev->cctx), &(next->cctx));
641	}	769	}
642	else	770	else
643	setup_coro (next);	771	setup_coro (next);
644	}	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;
645	}	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 ();
646	}	913	}
647		914
648	MODULE = Coro::State PACKAGE = Coro::State	915	MODULE = Coro::State PACKAGE = Coro::State
649		916
650	PROTOTYPES: ENABLE	917	PROTOTYPES: ENABLE
…		…
662		929
663	if (!padlist_cache)	930	if (!padlist_cache)
664	padlist_cache = newHV ();	931	padlist_cache = newHV ();
665		932
666	main_mainstack = PL_mainstack;	933	main_mainstack = PL_mainstack;
		934
		935	coroapi.ver = CORO_API_VERSION;
		936	coroapi.transfer = api_transfer;
667	}	937	}
668		938
669	Coro::State	939	Coro::State
670	_newprocess(args)	940	_newprocess(args)
671	SV * args	941	SV * args
…		…
674	Coro__State coro;	944	Coro__State coro;
675		945
676	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	946	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
677	croak ("Coro::State::_newprocess expects an arrayref");	947	croak ("Coro::State::_newprocess expects an arrayref");
678		948
679	New (0, coro, 1, struct coro);	949	Newz (0, coro, 1, struct coro);
680		950
681	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	951	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
682	coro->mainstack = 0; /* actual work is done inside transfer */	952	coro->mainstack = 0; /* actual work is done inside transfer */
683	coro->sptr = 0;	953	coro->stack = 0;
684	coro->ssize = 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;
685		960
686	RETVAL = coro;	961	RETVAL = coro;
687	OUTPUT:	962	OUTPUT:
688	RETVAL	963	RETVAL
689		964
690	void	965	void
691	transfer(prev, next, flags = TRANSFER_SAVE_ALL)	966	transfer(prev, next, flags)
692	Coro::State_or_hashref prev	967	SV *prev
693	Coro::State_or_hashref next	968	SV *next
694	int flags	969	int flags
695	PROTOTYPE: @	970	PROTOTYPE: @
696	CODE:	971	CODE:
		972	PUTBACK;
		973	SV_CORO (next, "Coro::transfer");
		974	SV_CORO (prev, "Coro::transfer");
697	transfer (aTHX_ prev, next, flags);	975	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		976	SPAGAIN;
698		977
699	void	978	void
700	DESTROY(coro)	979	DESTROY(coro)
701	Coro::State coro	980	Coro::State coro
702	CODE:	981	CODE:
703		982
704	if (coro->mainstack && coro->mainstack != main_mainstack)	983	if (coro->mainstack && coro->mainstack != main_mainstack)
705	{	984	{
706	struct coro temp;	985	struct coro temp;
707		986
		987	PUTBACK;
708	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	988	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
709	LOAD(aTHX_ coro);	989	LOAD(aTHX_ coro);
		990	SPAGAIN;
710		991
711	destroy_stacks (aTHX);	992	destroy_stacks (aTHX);
712		993
713	LOAD((&temp)); /* this will get rid of defsv etc.. */	994	LOAD((&temp)); /* this will get rid of defsv etc.. */
		995	SPAGAIN;
714		996
715	coro->mainstack = 0;	997	coro->mainstack = 0;
716	}	998	}
717		999
718	if (coro->sptr)
719	{
720	deallocate_stack (coro);	1000	deallocate_stack (coro);
721	coro->sptr = 0;	1001	SvREFCNT_dec (coro->args);
722	}
723
724	Safefree (coro);	1002	Safefree (coro);
725		1003
726	void	1004	void
727	flush()	1005	_exit(code)
		1006	int code
		1007	PROTOTYPE: $
728	CODE:	1008	CODE:
729	#ifdef MAY_FLUSH	1009	_exit (code);
730	flush_padlist_cache ();
731	#endif
732		1010
733	MODULE = Coro::State PACKAGE = Coro::Cont	1011	MODULE = Coro::State PACKAGE = Coro::Cont
734		1012
735	# this is slightly dirty	1013	# this is slightly dirty (should expose a c-level api)
736		1014
737	void	1015	void
738	yield(...)	1016	yield(...)
739	PROTOTYPE: @	1017	PROTOTYPE: @
740	CODE:	1018	CODE:
…		…
742	SV *sv;	1020	SV *sv;
743	AV *defav = GvAV (PL_defgv);	1021	AV *defav = GvAV (PL_defgv);
744	struct coro prev, next;	1022	struct coro prev, next;
745		1023
746	if (!returnstk)	1024	if (!returnstk)
747	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1025	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
748		1026
749	/* set up @_ -- ugly */	1027	/* set up @_ -- ugly */
750	av_clear (defav);	1028	av_clear (defav);
751	av_fill (defav, items - 1);	1029	av_fill (defav, items - 1);
752	while (items--)	1030	while (items--)
…		…
758	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1036	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
759	SvREFCNT_dec (sv);	1037	SvREFCNT_dec (sv);
760		1038
761	transfer(aTHX_ prev, next, 0);	1039	transfer(aTHX_ prev, next, 0);
762		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
		1087	#endif
		1088
		1089	int
		1090	nready(...)
		1091	PROTOTYPE:
		1092	CODE:
		1093	RETVAL = coro_nready;
		1094	OUTPUT:
		1095	RETVAL
		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 1.14 by root, Mon Jul 23 23:48:05 2001 UTC vs. Revision 1.54 by pcg, Sat Mar 13 06:45:04 2004 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 1.54 by pcg, Sat Mar 13 06:45:04 2004 UTC