[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 1.76 by root, Thu Oct 26 08:45:56 2006 UTC

…		…
		1	#define PERL_NO_GET_CONTEXT
		2
		3	#include "libcoro/coro.c"
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "libcoro/coro.c"	9	#include "patchlevel.h"
		10
		11	#if PERL_VERSION < 6
		12	# ifndef PL_ppaddr
		13	# define PL_ppaddr ppaddr
		14	# endif
		15	# ifndef call_sv
		16	# define call_sv perl_call_sv
		17	# endif
		18	# ifndef get_sv
		19	# define get_sv perl_get_sv
		20	# endif
		21	# ifndef get_cv
		22	# define get_cv perl_get_cv
		23	# endif
		24	# ifndef IS_PADGV
		25	# define IS_PADGV(v) 0
		26	# endif
		27	# ifndef IS_PADCONST
		28	# define IS_PADCONST(v) 0
		29	# endif
		30	#endif
		31
		32	#include <errno.h>
6		33
7	#ifdef HAVE_MMAP	34	#ifdef HAVE_MMAP
8	# include <unistd.h>	35	# include <unistd.h>
9	# include <sys/mman.h>	36	# include <sys/mman.h>
		37	# ifndef MAP_ANONYMOUS
		38	# ifdef MAP_ANON
		39	# define MAP_ANONYMOUS MAP_ANON
		40	# else
		41	# undef HAVE_MMAP
		42	# endif
10	#endif	43	# endif
11		44	#endif
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		45
21	#define SUB_INIT "Coro::State::initialize"	46	#define SUB_INIT "Coro::State::initialize"
22	#define UCORO_STATE "_coro_state"	47	#define UCORO_STATE "_coro_state"
23		48
		49	/* The next macro should declare a variable stacklevel that contains and approximation
		50	* to the current C stack pointer. Its property is that it changes with each call
		51	* and should be unique. */
		52	#define dSTACKLEVEL void *stacklevel = &stacklevel
		53
		54	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		55
		56	#define labs(l) ((l) >= 0 ? (l) : -(l))
		57
		58	#include "CoroAPI.h"
		59
		60	#ifdef USE_ITHREADS
		61	static perl_mutex coro_mutex;
		62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		64	#else
		65	# define LOCK (void)0
		66	# define UNLOCK (void)0
		67	#endif
		68
		69	static struct CoroAPI coroapi;
		70	static AV main_mainstack; / used to differentiate between $main and others */
		71	static HV *coro_state_stash;
		72	static SV *ucoro_state_sv;
		73	static U32 ucoro_state_hash;
		74	static SV coro_mortal; / will be freed after next transfer */
		75
		76	/* this is actually not only the c stack but also c registers etc... */
		77	typedef struct {
		78	int refcnt; /* pointer reference counter */
		79	int usecnt; /* shared by how many coroutines */
		80	int gencnt; /* generation counter */
		81
		82	coro_context cctx;
		83
		84	void *sptr;
		85	long ssize; /* positive == mmap, otherwise malloc */
		86	} coro_stack;
		87
24	struct coro {	88	struct coro {
		89	/* the top-level JMPENV for each coroutine, needed to catch dies. */
		90	JMPENV start_env;
		91
25	/* the optional C context */	92	/* the optional C context */
26	coro_context cctx;	93	coro_stack *stack;
27	void *sptr;	94	void *cursp;
28	long ssize;	95	int gencnt;
29		96
30	/* optionally saved, might be zero */	97	/* optionally saved, might be zero */
31	AV *defav;	98	AV *defav;
32	SV *defsv;	99	SV *defsv;
33	SV *errsv;	100	SV *errsv;
34		101
35	/* saved global state not related to stacks */	102	/* saved global state not related to stacks */
36	U8 dowarn;	103	U8 dowarn;
		104	I32 in_eval;
37		105
38	/* the stacks and related info (callchain etc..) */	106	/* the stacks and related info (callchain etc..) */
39	PERL_SI *curstackinfo;	107	PERL_SI *curstackinfo;
40	AV *curstack;	108	AV *curstack;
41	AV *mainstack;	109	AV *mainstack;
42	SV **stack_sp;	110	SV **stack_sp;
43	OP *op;	111	OP *op;
44	SV **curpad;	112	SV **curpad;
		113	AV *comppad;
		114	CV *compcv;
45	SV **stack_base;	115	SV **stack_base;
46	SV **stack_max;	116	SV **stack_max;
47	SV **tmps_stack;	117	SV **tmps_stack;
48	I32 tmps_floor;	118	I32 tmps_floor;
49	I32 tmps_ix;	119	I32 tmps_ix;
58	I32 savestack_ix;	128	I32 savestack_ix;
59	I32 savestack_max;	129	I32 savestack_max;
60	OP **retstack;	130	OP **retstack;
61	I32 retstack_ix;	131	I32 retstack_ix;
62	I32 retstack_max;	132	I32 retstack_max;
		133	PMOP *curpm;
63	COP *curcop;	134	COP *curcop;
64	JMPENV start_env;
65	JMPENV *top_env;	135	JMPENV *top_env;
66		136
67	/* data associated with this coroutine (initial args) */	137	/* data associated with this coroutine (initial args) */
68	AV *args;	138	AV *args;
69	};	139	};
70		140
71	typedef struct coro *Coro__State;	141	typedef struct coro *Coro__State;
72	typedef struct coro *Coro__State_or_hashref;	142	typedef struct coro *Coro__State_or_hashref;
73		143
74	static AV main_mainstack; / used to differentiate between $main and others */
75	static HV *coro_state_stash;
76	static SV *ucoro_state_sv;
77	static U32 ucoro_state_hash;
78	static HV *padlist_cache;
79
80	/* mostly copied from op.c:cv_clone2 */	144	/* mostly copied from op.c:cv_clone2 */
81	STATIC AV *	145	STATIC AV *
82	clone_padlist (AV *protopadlist)	146	clone_padlist (pTHX_ AV *protopadlist)
83	{	147	{
84	AV *av;	148	AV *av;
85	I32 ix;	149	I32 ix;
86	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);	150	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
87	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);	151	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
…		…
106	av_store (newpadlist, 1, (SV *) newpad);	170	av_store (newpadlist, 1, (SV *) newpad);
107		171
108	av = newAV (); /* will be @_ */	172	av = newAV (); /* will be @_ */
109	av_extend (av, 0);	173	av_extend (av, 0);
110	av_store (newpad, 0, (SV *) av);	174	av_store (newpad, 0, (SV *) av);
111	AvFLAGS (av) = AVf_REIFY;	175	AvREIFY_on (av);
112		176
113	for (ix = fpad; ix > 0; ix--)	177	for (ix = fpad; ix > 0; ix--)
114	{	178	{
115	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	179	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
		180
116	if (namesv && namesv != &PL_sv_undef)	181	if (namesv && namesv != &PL_sv_undef)
117	{	182	{
118	char name = SvPVX (namesv); / XXX */	183	char name = SvPVX (namesv); / XXX */
		184
119	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	185	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
120	{ /* lexical from outside? */	186	{ /* lexical from outside? */
121	npad[ix] = SvREFCNT_inc (ppad[ix]);	187	npad[ix] = SvREFCNT_inc (ppad[ix]);
122	}	188	}
123	else	189	else
…		…
129	sv = (SV *) newAV ();	195	sv = (SV *) newAV ();
130	else if (*name == '%')	196	else if (*name == '%')
131	sv = (SV *) newHV ();	197	sv = (SV *) newHV ();
132	else	198	else
133	sv = NEWSV (0, 0);	199	sv = NEWSV (0, 0);
		200
		201	#ifdef SvPADBUSY
134	if (!SvPADBUSY (sv))	202	if (!SvPADBUSY (sv))
		203	#endif
135	SvPADMY_on (sv);	204	SvPADMY_on (sv);
		205
136	npad[ix] = sv;	206	npad[ix] = sv;
137	}	207	}
138	}	208	}
139	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	209	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
140	{	210	{
…		…
169	#endif	239	#endif
170		240
171	return newpadlist;	241	return newpadlist;
172	}	242	}
173		243
174	#ifdef MAY_FLUSH	244	STATIC void
175	STATIC AV *
176	free_padlist (AV *padlist)	245	free_padlist (pTHX_ AV *padlist)
177	{	246	{
178	/* may be during global destruction */	247	/* may be during global destruction */
179	if (SvREFCNT(padlist))	248	if (SvREFCNT (padlist))
180	{	249	{
181	I32 i = AvFILLp(padlist);	250	I32 i = AvFILLp (padlist);
182	while (i >= 0)	251	while (i >= 0)
183	{	252	{
184	SV **svp = av_fetch(padlist, i--, FALSE);	253	SV **svp = av_fetch (padlist, i--, FALSE);
185	SV sv = svp ? svp : Nullsv;
186	if (sv)	254	if (svp)
		255	{
		256	SV *sv;
		257	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
187	SvREFCNT_dec(sv);	258	SvREFCNT_dec (sv);
		259
		260	SvREFCNT_dec (*svp);
		261	}
188	}	262	}
189		263
190	SvREFCNT_dec((SV*)padlist);	264	SvREFCNT_dec ((SV*)padlist);
191	}	265	}
192	}	266	}
193	#endif	267
		268	STATIC int
		269	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		270	{
		271	AV *padlist;
		272	AV av = (AV )mg->mg_obj;
		273
		274	/* casting is fun. */
		275	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		276	free_padlist (aTHX_ padlist);
		277
		278	SvREFCNT_dec (av);
		279
		280	return 0;
		281	}
		282
		283	#define PERL_MAGIC_coro PERL_MAGIC_ext
		284
		285	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
194		286
195	/* the next two functions merely cache the padlists */	287	/* the next two functions merely cache the padlists */
196	STATIC void	288	STATIC void
197	get_padlist (CV *cv)	289	get_padlist (pTHX_ CV *cv)
198	{	290	{
199	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	291	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
200		292
201	if (he && AvFILLp ((AV )he) >= 0)	293	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
202	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	294	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);
203	else	295	else
204	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	296	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));
205	}	297	}
206		298
207	STATIC void	299	STATIC void
208	put_padlist (CV *cv)	300	put_padlist (pTHX_ CV *cv)
209	{	301	{
210	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);	302	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
211		303
212	if (SvTYPE (*he) != SVt_PVAV)	304	if (!mg)
213	{	305	{
214	SvREFCNT_dec (*he);	306	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		307	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		308	mg->mg_virtual = &vtbl_coro;
215	he = (SV )newAV ();	309	mg->mg_obj = (SV *)newAV ();
216	}	310	}
217		311
218	av_push ((AV )he, (SV *)CvPADLIST (cv));	312	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));
219	}	313	}
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		314
247	#define SB do {	315	#define SB do {
248	#define SE } while (0)	316	#define SE } while (0)
249		317
250	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	318	#define LOAD(state) load_state(aTHX_ (state));
251	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	319	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
252		320
253	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	321	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
254		322
255	static void	323	static void
256	load_state(pTHX_ Coro__State c)	324	load_state(pTHX_ Coro__State c)
257	{	325	{
258	PL_dowarn = c->dowarn;	326	PL_dowarn = c->dowarn;
		327	PL_in_eval = c->in_eval;
259		328
260	PL_curstackinfo = c->curstackinfo;	329	PL_curstackinfo = c->curstackinfo;
261	PL_curstack = c->curstack;	330	PL_curstack = c->curstack;
262	PL_mainstack = c->mainstack;	331	PL_mainstack = c->mainstack;
263	PL_stack_sp = c->stack_sp;	332	PL_stack_sp = c->stack_sp;
264	PL_op = c->op;	333	PL_op = c->op;
265	PL_curpad = c->curpad;	334	PL_curpad = c->curpad;
		335	PL_comppad = c->comppad;
		336	PL_compcv = c->compcv;
266	PL_stack_base = c->stack_base;	337	PL_stack_base = c->stack_base;
267	PL_stack_max = c->stack_max;	338	PL_stack_max = c->stack_max;
268	PL_tmps_stack = c->tmps_stack;	339	PL_tmps_stack = c->tmps_stack;
269	PL_tmps_floor = c->tmps_floor;	340	PL_tmps_floor = c->tmps_floor;
270	PL_tmps_ix = c->tmps_ix;	341	PL_tmps_ix = c->tmps_ix;
…		…
276	PL_scopestack_ix = c->scopestack_ix;	347	PL_scopestack_ix = c->scopestack_ix;
277	PL_scopestack_max = c->scopestack_max;	348	PL_scopestack_max = c->scopestack_max;
278	PL_savestack = c->savestack;	349	PL_savestack = c->savestack;
279	PL_savestack_ix = c->savestack_ix;	350	PL_savestack_ix = c->savestack_ix;
280	PL_savestack_max = c->savestack_max;	351	PL_savestack_max = c->savestack_max;
		352	#if PERL_VERSION < 9
281	PL_retstack = c->retstack;	353	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;	354	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;	355	PL_retstack_max = c->retstack_max;
		356	#endif
		357	PL_curpm = c->curpm;
284	PL_curcop = c->curcop;	358	PL_curcop = c->curcop;
285	PL_start_env = c->start_env;
286	PL_top_env = c->top_env;	359	PL_top_env = c->top_env;
287		360
288	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	361	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
289	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	362	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
290	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	363	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
298	{	371	{
299	AV padlist = (AV )POPs;	372	AV padlist = (AV )POPs;
300		373
301	if (padlist)	374	if (padlist)
302	{	375	{
303	put_padlist (cv); /* mark this padlist as available */	376	put_padlist (aTHX_ cv); /* mark this padlist as available */
304	CvPADLIST(cv) = padlist;	377	CvPADLIST(cv) = padlist;
305	#ifdef USE_THREADS
306	/CvOWNER(cv) = (struct perl_thread )POPs;*/
307	#endif
308	}	378	}
309		379
310	++CvDEPTH(cv);	380	++CvDEPTH(cv);
311	}	381	}
312		382
…		…
330		400
331	PUSHs (Nullsv);	401	PUSHs (Nullsv);
332	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
333	for (;;)	403	for (;;)
334	{	404	{
335	do	405	while (cxix >= 0)
336	{	406	{
337	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
338		408
339	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE(cx) == CXt_SUB)
340	{	410	{
341	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
342	if (CvDEPTH(cv))	412	if (CvDEPTH(cv))
343	{	413	{
344	#ifdef USE_THREADS
345	/XPUSHs ((SV )CvOWNER(cv));*/
346	/CvOWNER(cv) = 0;/
347	/error must unlock this cv etc.. etc.../
348	#endif
349	EXTEND (SP, CvDEPTH(cv)*2);	414	EXTEND (SP, CvDEPTH(cv)*2);
350		415
351	while (--CvDEPTH(cv))	416	while (--CvDEPTH(cv))
352	{	417	{
353	/* this tells the restore code to increment CvDEPTH */	418	/* this tells the restore code to increment CvDEPTH */
…		…
356	}	421	}
357		422
358	PUSHs ((SV *)CvPADLIST(cv));	423	PUSHs ((SV *)CvPADLIST(cv));
359	PUSHs ((SV *)cv);	424	PUSHs ((SV *)cv);
360		425
361	get_padlist (cv); /* this is a monster */	426	get_padlist (aTHX_ cv); /* this is a monster */
362	}	427	}
363	}	428	}
		429	#ifdef CXt_FORMAT
364	else if (CxTYPE(cx) == CXt_FORMAT)	430	else if (CxTYPE(cx) == CXt_FORMAT)
365	{	431	{
366	/* I never used formats, so how should I know how these are implemented? */	432	/* I never used formats, so how should I know how these are implemented? */
367	/* my bold guess is as a simple, plain sub... */	433	/* my bold guess is as a simple, plain sub... */
368	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	434	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
369	}	435	}
		436	#endif
370	}	437	}
371	while (cxix >= 0);
372		438
373	if (top_si->si_type == PERLSI_MAIN)	439	if (top_si->si_type == PERLSI_MAIN)
374	break;	440	break;
375		441
376	top_si = top_si->si_prev;	442	top_si = top_si->si_prev;
…		…
383		449
384	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	450	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
385	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	451	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
386	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	452	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
387		453
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;	454	c->dowarn = PL_dowarn;
		455	c->in_eval = PL_in_eval;
394		456
395	c->curstackinfo = PL_curstackinfo;	457	c->curstackinfo = PL_curstackinfo;
396	c->curstack = PL_curstack;	458	c->curstack = PL_curstack;
397	c->mainstack = PL_mainstack;	459	c->mainstack = PL_mainstack;
398	c->stack_sp = PL_stack_sp;	460	c->stack_sp = PL_stack_sp;
399	c->op = PL_op;	461	c->op = PL_op;
400	c->curpad = PL_curpad;	462	c->curpad = PL_curpad;
		463	c->comppad = PL_comppad;
		464	c->compcv = PL_compcv;
401	c->stack_base = PL_stack_base;	465	c->stack_base = PL_stack_base;
402	c->stack_max = PL_stack_max;	466	c->stack_max = PL_stack_max;
403	c->tmps_stack = PL_tmps_stack;	467	c->tmps_stack = PL_tmps_stack;
404	c->tmps_floor = PL_tmps_floor;	468	c->tmps_floor = PL_tmps_floor;
405	c->tmps_ix = PL_tmps_ix;	469	c->tmps_ix = PL_tmps_ix;
…		…
411	c->scopestack_ix = PL_scopestack_ix;	475	c->scopestack_ix = PL_scopestack_ix;
412	c->scopestack_max = PL_scopestack_max;	476	c->scopestack_max = PL_scopestack_max;
413	c->savestack = PL_savestack;	477	c->savestack = PL_savestack;
414	c->savestack_ix = PL_savestack_ix;	478	c->savestack_ix = PL_savestack_ix;
415	c->savestack_max = PL_savestack_max;	479	c->savestack_max = PL_savestack_max;
		480	#if PERL_VERSION < 9
416	c->retstack = PL_retstack;	481	c->retstack = PL_retstack;
417	c->retstack_ix = PL_retstack_ix;	482	c->retstack_ix = PL_retstack_ix;
418	c->retstack_max = PL_retstack_max;	483	c->retstack_max = PL_retstack_max;
		484	#endif
		485	c->curpm = PL_curpm;
419	c->curcop = PL_curcop;	486	c->curcop = PL_curcop;
420	c->start_env = PL_start_env;
421	c->top_env = PL_top_env;	487	c->top_env = PL_top_env;
422	}	488	}
423		489
424	/*	490	/*
425	* allocate various perl stacks. This is an exact copy	491	* allocate various perl stacks. This is an exact copy
426	* of perl.c:init_stacks, except that it uses less memory	492	* of perl.c:init_stacks, except that it uses less memory
427	* on the assumption that coroutines do not usually need	493	* on the (sometimes correct) assumption that coroutines do
428	* a lot of stackspace.	494	* not usually need a lot of stackspace.
429	*/	495	*/
430	STATIC void	496	STATIC void
431	coro_init_stacks (pTHX)	497	coro_init_stacks (pTHX)
432	{	498	{
		499	LOCK;
		500
433	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	501	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
434	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
435	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
436	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
437		505
438	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
439	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
440	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
441		509
442	New(50,PL_tmps_stack,64,SV*);	510	New(50,PL_tmps_stack,96,SV*);
443	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
444	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
445	PL_tmps_max = 64;	513	PL_tmps_max = 96;
446		514
447	New(54,PL_markstack,12,I32);	515	New(54,PL_markstack,16,I32);
448	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
449	PL_markstack_max = PL_markstack + 12;	517	PL_markstack_max = PL_markstack + 16;
450		518
		519	#ifdef SET_MARK_OFFSET
451	SET_MARK_OFFSET;	520	SET_MARK_OFFSET;
		521	#endif
452		522
453	New(54,PL_scopestack,12,I32);	523	New(54,PL_scopestack,16,I32);
454	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
455	PL_scopestack_max = 12;	525	PL_scopestack_max = 16;
456		526
457	New(54,PL_savestack,64,ANY);	527	New(54,PL_savestack,96,ANY);
458	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
459	PL_savestack_max = 64;	529	PL_savestack_max = 96;
460		530
		531	#if PERL_VERSION < 9
461	New(54,PL_retstack,8,OP*);	532	New(54,PL_retstack,8,OP*);
462	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
463	PL_retstack_max = 8;	534	PL_retstack_max = 8;
		535	#endif
		536
		537	UNLOCK;
464	}	538	}
465		539
466	/*	540	/*
467	* destroy the stacks, the callchain etc...	541	* destroy the stacks, the callchain etc...
468	* still there is a memleak of 128 bytes...
469	*/	542	*/
470	STATIC void	543	STATIC void
471	destroy_stacks(pTHX)	544	destroy_stacks(pTHX)
472	{	545	{
		546	if (!IN_DESTRUCT)
		547	{
473	/* is this ugly, I ask? */	548	/* is this ugly, I ask? */
474	while (PL_scopestack_ix)	549	LEAVE_SCOPE (0);
475	LEAVE;
476		550
477	/* sure it is, but more important: is it correct?? :/ */	551	/* 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;	552	FREETMPS;
		553
		554	/POPSTACK_TO (PL_mainstack);//D//use/
		555	}
480		556
481	while (PL_curstackinfo->si_next)	557	while (PL_curstackinfo->si_next)
482	PL_curstackinfo = PL_curstackinfo->si_next;	558	PL_curstackinfo = PL_curstackinfo->si_next;
483		559
484	while (PL_curstackinfo)	560	while (PL_curstackinfo)
485	{	561	{
486	PERL_SI *p = PL_curstackinfo->si_prev;	562	PERL_SI *p = PL_curstackinfo->si_prev;
487		563
488	{	564	{ /D//remove/
489	dSP;	565	dSP;
490	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	566	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
491	PUTBACK; /* possibly superfluous */	567	PUTBACK; /* possibly superfluous */
492	}	568	}
493		569
494	dounwind(-1);	570	if (!IN_DESTRUCT)
495		571	{
		572	dounwind (-1);/D//remove/
496	SvREFCNT_dec(PL_curstackinfo->si_stack);	573	SvREFCNT_dec (PL_curstackinfo->si_stack);
		574	}
		575
497	Safefree(PL_curstackinfo->si_cxstack);	576	Safefree (PL_curstackinfo->si_cxstack);
498	Safefree(PL_curstackinfo);	577	Safefree (PL_curstackinfo);
499	PL_curstackinfo = p;	578	PL_curstackinfo = p;
500	}	579	}
501		580
502	Safefree(PL_tmps_stack);	581	Safefree (PL_tmps_stack);
503	Safefree(PL_markstack);	582	Safefree (PL_markstack);
504	Safefree(PL_scopestack);	583	Safefree (PL_scopestack);
505	Safefree(PL_savestack);	584	Safefree (PL_savestack);
		585	#if PERL_VERSION < 9
506	Safefree(PL_retstack);	586	Safefree (PL_retstack);
		587	#endif
507	}	588	}
508		589
509	static void	590	static void
510	allocate_stack (Coro__State ctx)	591	allocate_stack (Coro__State ctx, int alloc)
511	{	592	{
512	#ifdef HAVE_MMAP	593	coro_stack *stack;
513	ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */	594
514	ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);	595	New (0, stack, 1, coro_stack);
515	if (ctx->sptr == (void *)-1)	596
516	#endif	597	stack->refcnt = 1;
		598	stack->usecnt = 1;
		599	stack->gencnt = ctx->gencnt = 0;
		600
		601	if (alloc)
517	{	602	{
518	/FIXME//D//* reasonable stack size! */	603	#if HAVE_MMAP
519	ctx->ssize = 4096 * sizeof (long);	604	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
520	New (0, ctx->sptr, 4096, long);	605	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		606	if (stack->sptr == (void *)-1)
		607	#endif
		608	{
		609	stack->ssize = - (STACKSIZE * (long)sizeof (long));
		610	New (0, stack->sptr, STACKSIZE, long);
		611	}
521	}	612	}
		613	else
		614	stack->sptr = 0;
		615
		616	ctx->stack = stack;
522	}	617	}
523		618
524	static void	619	static void
525	deallocate_stack (Coro__State ctx)	620	deallocate_stack (Coro__State ctx)
526	{	621	{
		622	coro_stack *stack = ctx->stack;
		623
		624	ctx->stack = 0;
		625
		626	if (stack)
		627	{
		628	if (!--stack->refcnt)
		629	{
527	#ifdef HAVE_MMAP	630	#ifdef HAVE_MMAP
528	munmap (ctx->sptr, ctx->ssize);	631	if (stack->ssize > 0 && stack->sptr)
529	#else	632	munmap (stack->sptr, stack->ssize);
530	Safefree (ctx->sptr);	633	else
531	#endif	634	#endif
532	}	635	Safefree (stack->sptr);
533		636
534	/* might go away together with optional SAVE_CCTXT */	637	Safefree (stack);
		638	}
		639	else if (ctx->gencnt == stack->gencnt)
		640	--stack->usecnt;
		641	}
		642	}
		643
535	static void	644	static void
536	setup_coro (void *arg)	645	setup_coro (void *arg)
537	{	646	{
538	/*	647	/*
539	* emulate part of the perl startup here.	648	* emulate part of the perl startup here.
540	*/	649	*/
		650	dTHX;
541	dSP;	651	dSP;
542	Coro__State ctx = (Coro__State)arg;	652	Coro__State ctx = (Coro__State)arg;
543	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);	653	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
544		654
545	coro_init_stacks (aTHX);	655	coro_init_stacks (aTHX);
546	JMPENV_BOOTSTRAP;	656	/PL_curcop = 0;/
		657	/PL_in_eval = PL_in_eval;/ /* inherit */
		658	SvREFCNT_dec (GvAV (PL_defgv));
		659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
		660
547	SPAGAIN;	661	SPAGAIN;
548		662
549	/PL_curcop = 0;/
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = ctx->args;
552
553	if (ctx->sptr)	663	if (ctx->stack)
554	{	664	{
		665	ctx->cursp = 0;
		666
555	PUSHMARK(SP);	667	PUSHMARK(SP);
556	PUTBACK;	668	PUTBACK;
557	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	669	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		670
		671	if (SvTRUE (ERRSV))
		672	croak (NULL);
		673	else
558	croak ("FATAL: CCTXT coroutine returned!");	674	croak ("FATAL: CCTXT coroutine returned!");
559	}	675	}
560	else	676	else
561	{	677	{
562	UNOP myop;	678	UNOP myop;
563		679
…		…
575	* that doesn't matter, though, since it is only	691	* that doesn't matter, though, since it is only
576	* pp_nextstate and we never return...	692	* pp_nextstate and we never return...
577	* ah yes, and I don't care anyways ;)	693	* ah yes, and I don't care anyways ;)
578	*/	694	*/
579	PUTBACK;	695	PUTBACK;
580	PL_op = pp_entersub();	696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
581	SPAGAIN;	697	SPAGAIN;
582		698
583	ENTER; /* necessary e.g. for dounwind */	699	ENTER; /* necessary e.g. for dounwind */
584	}	700	}
585	}	701	}
586		702
		703	static void
		704	continue_coro (void *arg)
		705	{
		706	/*
		707	* this is a _very_ stripped down perl interpreter ;)
		708	*/
		709	dTHX;
		710	Coro__State ctx = (Coro__State)arg;
		711
		712	PL_top_env = &ctx->start_env;
		713
		714	ctx->cursp = 0;
		715	PL_op = PL_op->op_next;
		716	CALLRUNOPS(aTHX);
		717
		718	abort ();
		719	}
		720
587	STATIC void	721	STATIC void
588	transfer(pTHX_ struct coro prev, struct coro next, int flags)	722	transfer (pTHX_ struct coro prev, struct coro next, int flags)
589	{	723	{
590	dSP;	724	dSTACKLEVEL;
591		725
592	if (prev != next)	726	if (prev != next)
593	{	727	{
594	/*
595	* this could be done in newprocess which would lead to
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)	728	if (next->mainstack)
601	{	729	{
		730	LOCK;
602	SAVE (prev, flags);	731	SAVE (prev, flags);
603	LOAD (next);	732	LOAD (next);
		733	UNLOCK;
604		734
605	/* mark this state as in-use */	735	/* mark this state as in-use */
606	next->mainstack = 0;	736	next->mainstack = 0;
607	next->tmps_ix = -2;	737	next->tmps_ix = -2;
608		738
		739	/* stacklevel changed? if yes, grab the stack for us! */
609	if (flags & TRANSFER_SAVE_CCTXT)	740	if (flags & TRANSFER_SAVE_CCTXT)
610	{	741	{
611	if (!next->ssize)
612	croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
613
614	if (!prev->ssize)	742	if (!prev->stack)
615	prev->ssize = 1; /* mark cctx as valid ;) */	743	allocate_stack (prev, 0);
		744	else if (prev->cursp != stacklevel
		745	&& prev->stack->usecnt > 1)
		746	{
		747	prev->gencnt = ++prev->stack->gencnt;
		748	prev->stack->usecnt = 1;
		749	}
616		750
		751	/* has our stack been invalidated? */
		752	if (next->stack && next->stack->gencnt != next->gencnt)
		753	{
		754	deallocate_stack (next);
		755	allocate_stack (next, 1);
		756	coro_create (&(next->stack->cctx),
		757	continue_coro, (void *)next,
		758	next->stack->sptr, labs (next->stack->ssize));
		759	}
		760
617	coro_transfer (&(prev->cctx), &(next->cctx));	761	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		762	prev->cursp = stacklevel;
		763	/* don't add any code here */
618	}	764	}
619		765	else
		766	next->cursp = stacklevel;
620	}	767	}
621	else if (next->tmps_ix == -2)	768	else if (next->tmps_ix == -2)
622	croak ("tried to transfer to running coroutine");	769	croak ("tried to transfer to running coroutine");
623	else	770	else
624	{	771	{
		772	LOCK;
625	SAVE (prev, -1); /* first get rid of the old state */	773	SAVE (prev, -1); /* first get rid of the old state */
		774	UNLOCK;
626		775
627	if (flags & TRANSFER_SAVE_CCTXT)	776	if (flags & TRANSFER_SAVE_CCTXT)
628	{	777	{
629	if (!next->ssize)	778	if (!prev->stack)
		779	allocate_stack (prev, 0);
		780
		781	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
630	{	782	{
		783	PL_top_env = &next->start_env;
		784
		785	setup_coro (next);
		786	next->cursp = stacklevel;
		787
		788	prev->stack->refcnt++;
		789	prev->stack->usecnt++;
		790	next->stack = prev->stack;
		791	next->gencnt = prev->gencnt;
		792	}
		793	else
		794	{
		795	assert (!next->stack);
631	allocate_stack (next);	796	allocate_stack (next, 1);
632	coro_create (&(next->cctx),	797	coro_create (&(next->stack->cctx),
633	setup_coro, (void *)next,	798	setup_coro, (void *)next,
634	next->sptr, next->ssize);	799	next->stack->sptr, labs (next->stack->ssize));
		800	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		801	prev->cursp = stacklevel;
		802	/* don't add any code here */
635	}	803	}
636
637	if (!prev->ssize)
638	prev->ssize = 1; /* mark cctx as valid ;) */
639
640	coro_transfer (&(prev->cctx), &(next->cctx));
641	}	804	}
642	else	805	else
		806	{
643	setup_coro (next);	807	setup_coro (next);
		808	next->cursp = stacklevel;
		809	}
644	}	810	}
645	}	811	}
		812
		813	LOCK;
		814	if (coro_mortal)
		815	{
		816	SvREFCNT_dec (coro_mortal);
		817	coro_mortal = 0;
		818	}
		819	UNLOCK;
		820	}
		821
		822	#define SV_CORO(sv,func) \
		823	do { \
		824	if (SvROK (sv)) \
		825	sv = SvRV (sv); \
		826	\
		827	if (SvTYPE (sv) == SVt_PVHV) \
		828	{ \
		829	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
		830	\
		831	if (!he) \
		832	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
		833	\
		834	(sv) = SvRV (HeVAL(he)); \
		835	} \
		836	\
		837	/* must also be changed inside Coro::Cont::yield */ \
		838	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
		839	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
		840	\
		841	} while(0)
		842
		843	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))
		844
		845	static void
		846	api_transfer(pTHX_ SV prev, SV next, int flags)
		847	{
		848	SV_CORO (prev, "Coro::transfer");
		849	SV_CORO (next, "Coro::transfer");
		850
		851	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		852	}
		853
		854	/ Coro ******************************************************************/
		855
		856	#define PRIO_MAX 3
		857	#define PRIO_HIGH 1
		858	#define PRIO_NORMAL 0
		859	#define PRIO_LOW -1
		860	#define PRIO_IDLE -3
		861	#define PRIO_MIN -4
		862
		863	/* for Coro.pm */
		864	static GV coro_current, coro_idle;
		865	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		866	static int coro_nready;
		867
		868	static void
		869	coro_enq (pTHX_ SV *sv)
		870	{
		871	SV **xprio;
		872	int prio;
		873
		874	if (SvTYPE (sv) != SVt_PVHV)
		875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		876
		877	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
		878	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		879
		880	prio = prio > PRIO_MAX ? PRIO_MAX
		881	: prio < PRIO_MIN ? PRIO_MIN
		882	: prio;
		883
		884	av_push (coro_ready [prio - PRIO_MIN], sv);
		885	coro_nready++;
		886	}
		887
		888	static SV *
		889	coro_deq (pTHX_ int min_prio)
		890	{
		891	int prio = PRIO_MAX - PRIO_MIN;
		892
		893	min_prio -= PRIO_MIN;
		894	if (min_prio < 0)
		895	min_prio = 0;
		896
		897	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		898	if (av_len (coro_ready[prio]) >= 0)
		899	{
		900	coro_nready--;
		901	return av_shift (coro_ready[prio]);
		902	}
		903
		904	return 0;
		905	}
		906
		907	static void
		908	api_ready (SV *coro)
		909	{
		910	dTHX;
		911
		912	if (SvROK (coro))
		913	coro = SvRV (coro);
		914
		915	LOCK;
		916	coro_enq (aTHX_ SvREFCNT_inc (coro));
		917	UNLOCK;
		918	}
		919
		920	static void
		921	api_schedule (void)
		922	{
		923	dTHX;
		924
		925	SV prev, next;
		926
		927	LOCK;
		928
		929	prev = SvRV (GvSV (coro_current));
		930	next = coro_deq (aTHX_ PRIO_MIN);
		931
		932	if (!next)
		933	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
		934
		935	/* free this only after the transfer */
		936	coro_mortal = prev;
		937	SV_CORO (prev, "Coro::schedule");
		938
		939	SvRV (GvSV (coro_current)) = next;
		940
		941	SV_CORO (next, "Coro::schedule");
		942
		943	UNLOCK;
		944
		945	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
		946	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		947	}
		948
		949	static void
		950	api_cede (void)
		951	{
		952	dTHX;
		953
		954	LOCK;
		955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
		956	UNLOCK;
		957
		958	api_schedule ();
646	}	959	}
647		960
648	MODULE = Coro::State PACKAGE = Coro::State	961	MODULE = Coro::State PACKAGE = Coro::State
649		962
650	PROTOTYPES: ENABLE	963	PROTOTYPES: ENABLE
651		964
652	BOOT:	965	BOOT:
653	{ /* {} necessary for stoopid perl-5.6.x */	966	{ /* {} necessary for stoopid perl-5.6.x */
		967	#ifdef USE_ITHREADS
		968	MUTEX_INIT (&coro_mutex);
		969	#endif
		970
654	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	971	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
655	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	972	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
656	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	973	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
657		974
658	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	975	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
659	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	976	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
660	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	977	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
661	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	978	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
662		979
663	if (!padlist_cache)
664	padlist_cache = newHV ();
665
666	main_mainstack = PL_mainstack;	980	main_mainstack = PL_mainstack;
		981
		982	coroapi.ver = CORO_API_VERSION;
		983	coroapi.transfer = api_transfer;
667	}	984	}
668		985
669	Coro::State	986	Coro::State
670	_newprocess(args)	987	_newprocess(args)
671	SV * args	988	SV * args
…		…
674	Coro__State coro;	991	Coro__State coro;
675		992
676	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	993	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
677	croak ("Coro::State::_newprocess expects an arrayref");	994	croak ("Coro::State::_newprocess expects an arrayref");
678		995
679	New (0, coro, 1, struct coro);	996	Newz (0, coro, 1, struct coro);
680		997
681	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	998	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
682	coro->mainstack = 0; /* actual work is done inside transfer */	999	/coro->mainstack = 0; //actual work is done inside transfer /
683	coro->sptr = 0;	1000	/coro->stack = 0;/
684	coro->ssize = 0;	1001
		1002	/* same as JMPENV_BOOTSTRAP */
		1003	/* we might be able to recycle start_env, but safe is safe */
		1004	/Zero(&coro->start_env, 1, JMPENV);/
		1005	coro->start_env.je_ret = -1;
		1006	coro->start_env.je_mustcatch = TRUE;
685		1007
686	RETVAL = coro;	1008	RETVAL = coro;
687	OUTPUT:	1009	OUTPUT:
688	RETVAL	1010	RETVAL
689		1011
690	void	1012	void
691	transfer(prev, next, flags = TRANSFER_SAVE_ALL)	1013	transfer(prev, next, flags)
692	Coro::State_or_hashref prev	1014	SV *prev
693	Coro::State_or_hashref next	1015	SV *next
694	int flags	1016	int flags
695	PROTOTYPE: @	1017	PROTOTYPE: @
696	CODE:	1018	CODE:
		1019	PUTBACK;
		1020	SV_CORO (next, "Coro::transfer");
		1021	SV_CORO (prev, "Coro::transfer");
697	transfer (aTHX_ prev, next, flags);	1022	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		1023	SPAGAIN;
698		1024
699	void	1025	void
700	DESTROY(coro)	1026	DESTROY(coro)
701	Coro::State coro	1027	Coro::State coro
702	CODE:	1028	CODE:
703		1029
704	if (coro->mainstack && coro->mainstack != main_mainstack)	1030	if (coro->mainstack && coro->mainstack != main_mainstack)
705	{	1031	{
706	struct coro temp;	1032	struct coro temp;
707		1033
		1034	PUTBACK;
708	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1035	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
709	LOAD(aTHX_ coro);	1036	LOAD (aTHX_ coro);
		1037	SPAGAIN;
710		1038
711	destroy_stacks (aTHX);	1039	destroy_stacks (aTHX);
712		1040
713	LOAD((&temp)); /* this will get rid of defsv etc.. */	1041	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		1042	SPAGAIN;
714		1043
715	coro->mainstack = 0;	1044	coro->mainstack = 0;
716	}	1045	}
717		1046
718	if (coro->sptr)
719	{
720	deallocate_stack (coro);	1047	deallocate_stack (coro);
721	coro->sptr = 0;	1048	SvREFCNT_dec (coro->args);
722	}
723
724	Safefree (coro);	1049	Safefree (coro);
725		1050
726	void	1051	void
727	flush()	1052	_exit(code)
		1053	int code
		1054	PROTOTYPE: $
728	CODE:	1055	CODE:
729	#ifdef MAY_FLUSH	1056	_exit (code);
730	flush_padlist_cache ();
731	#endif
732		1057
733	MODULE = Coro::State PACKAGE = Coro::Cont	1058	MODULE = Coro::State PACKAGE = Coro::Cont
734		1059
735	# this is slightly dirty	1060	# this is slightly dirty (should expose a c-level api)
736		1061
737	void	1062	void
738	yield(...)	1063	yield(...)
739	PROTOTYPE: @	1064	PROTOTYPE: @
740	CODE:	1065	CODE:
741	static SV *returnstk;	1066	SV *yieldstack;
742	SV *sv;	1067	SV *sv;
743	AV *defav = GvAV (PL_defgv);	1068	AV *defav = GvAV (PL_defgv);
744	struct coro prev, next;	1069	struct coro prev, next;
745		1070
746	if (!returnstk)	1071	yieldstack = *hv_fetch (
747	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1072	(HV *)SvRV (GvSV (coro_current)),
		1073	"yieldstack", sizeof ("yieldstack") - 1,
		1074	0
		1075	);
748		1076
749	/* set up @_ -- ugly */	1077	/* set up @_ -- ugly */
750	av_clear (defav);	1078	av_clear (defav);
751	av_fill (defav, items - 1);	1079	av_fill (defav, items - 1);
752	while (items--)	1080	while (items--)
753	av_store (defav, items, SvREFCNT_inc (ST(items)));	1081	av_store (defav, items, SvREFCNT_inc (ST(items)));
754		1082
755	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
756	sv = av_pop ((AV *)SvRV (returnstk));	1083	sv = av_pop ((AV *)SvRV (yieldstack));
757	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));	1084	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));
758	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1085	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));
759	SvREFCNT_dec (sv);	1086	SvREFCNT_dec (sv);
760		1087
761	transfer(aTHX_ prev, next, 0);	1088	transfer (aTHX_ prev, next, 0);
762		1089
		1090	MODULE = Coro::State PACKAGE = Coro
		1091
		1092	# this is slightly dirty (should expose a c-level api)
		1093
		1094	BOOT:
		1095	{
		1096	int i;
		1097	HV *stash = gv_stashpv ("Coro", TRUE);
		1098
		1099	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1100	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1101	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1102	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1103	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1104	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1105
		1106	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1107	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1108
		1109	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1110	coro_ready[i] = newAV ();
		1111
		1112	{
		1113	SV *sv = perl_get_sv("Coro::API", 1);
		1114
		1115	coroapi.schedule = api_schedule;
		1116	coroapi.cede = api_cede;
		1117	coroapi.ready = api_ready;
		1118	coroapi.nready = &coro_nready;
		1119	coroapi.current = coro_current;
		1120
		1121	GCoroAPI = &coroapi;
		1122	sv_setiv(sv, (IV)&coroapi);
		1123	SvREADONLY_on(sv);
		1124	}
		1125	}
		1126
		1127	#if !PERL_MICRO
		1128
		1129	void
		1130	ready(self)
		1131	SV * self
		1132	PROTOTYPE: $
		1133	CODE:
		1134	api_ready (self);
		1135
		1136	#endif
		1137
		1138	int
		1139	nready(...)
		1140	PROTOTYPE:
		1141	CODE:
		1142	RETVAL = coro_nready;
		1143	OUTPUT:
		1144	RETVAL
		1145
		1146	void
		1147	schedule(...)
		1148	PROTOTYPE:
		1149	CODE:
		1150	api_schedule ();
		1151
		1152	void
		1153	cede(...)
		1154	PROTOTYPE:
		1155	CODE:
		1156	api_cede ();
		1157
		1158	# and these are hacks
		1159	SV *
		1160	_aio_get_state ()
		1161	CODE:
		1162	{
		1163	struct {
		1164	int errorno;
		1165	int laststype;
		1166	int laststatval;
		1167	Stat_t statcache;
		1168	} data;
		1169
		1170	data.errorno = errno;
		1171	data.laststype = PL_laststype;
		1172	data.laststatval = PL_laststatval;
		1173	data.statcache = PL_statcache;
		1174
		1175	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1176	}
		1177	OUTPUT:
		1178	RETVAL
		1179
		1180	void
		1181	_aio_set_state (char *data_)
		1182	PROTOTYPE: $
		1183	CODE:
		1184	{
		1185	struct {
		1186	int errorno;
		1187	int laststype;
		1188	int laststatval;
		1189	Stat_t statcache;
		1190	} data = (void )data_;
		1191
		1192	errno = data->errorno;
		1193	PL_laststype = data->laststype;
		1194	PL_laststatval = data->laststatval;
		1195	PL_statcache = data->statcache;
		1196	}

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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 1.76 by root, Thu Oct 26 08:45:56 2006 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 1.76 by root, Thu Oct 26 08:45:56 2006 UTC