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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.72 by root, Wed Feb 1 23:59:41 2006 UTC vs.
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	#define PERL_VERSION_ATLEAST(a,b,c) \
		14	(PERL_REVISION > (a) \
		15	|| (PERL_REVISION == (a) \
		16	&& (PERL_VERSION > (b) \
		17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		18
		19	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
14	# endif	22	# endif
15	# ifndef call_sv	23	# ifndef call_sv
16	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
29	# endif	37	# endif
30	#endif	38	#endif
31		39
		40	#include <stdio.h>
32	#include <errno.h>	41	#include <errno.h>
33	#include <signal.h>	42
		43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		44	# undef STACKGUARD
		45	#endif
		46
		47	#ifndef STACKGUARD
		48	# define STACKGUARD 0
		49	#endif
34		50
35	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
36	# include <unistd.h>	52	# include <unistd.h>
37	# include <sys/mman.h>	53	# include <sys/mman.h>
38	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
40	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
41	# else	57	# else
42	# undef HAVE_MMAP	58	# undef HAVE_MMAP
43	# endif	59	# endif
44	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE (void)0
45	#endif	68	# endif
46		69	#else
47	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
48	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
49		73
50	/* The next macro should declare a variable stacklevel that contains and approximation	74	/* The next macro should declare a variable stacklevel that contains and approximation
51	* to the current C stack pointer. Its property is that it changes with each call	75	* to the current C stack pointer. Its property is that it changes with each call
52	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
54		79
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		81
57	#define labs(l) ((l) >= 0 ? (l) : -(l))	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
58		89
59	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
60		93
61	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
63	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
67	# define UNLOCK (void)0	100	# define UNLOCK (void)0
68	#endif	101	#endif
69		102
70	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
71	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
72	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
73	static SV *ucoro_state_sv;
74	static U32 ucoro_state_hash;
75	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
76		107
77	/* this is actually not only the c stack but also c registers etc... */	108	/* this is a structure representing a c-level coroutine */
78	typedef struct {	109	typedef struct coro_cctx {
79	int refcnt; /* pointer reference counter */	110	struct coro_cctx *next;
80	int usecnt; /* shared by how many coroutines */
81	int gencnt; /* generation counter */
82		111
83	coro_context cctx;	112	/* the stack */
84
85	void *sptr;	113	void *sptr;
86	long ssize; /* positive == mmap, otherwise malloc */	114	long ssize; /* positive == mmap, otherwise malloc */
87	} coro_stack;
88		115
		116	/* cpu state */
		117	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		118	JMPENV *top_env;
		119	coro_context cctx;
		120
		121	#if USE_VALGRIND
		122	int valgrind_id;
		123	#endif
		124	} coro_cctx;
		125
		126	/* this is a structure representing a perl-level coroutine */
89	struct coro {	127	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	128	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;	129	coro_cctx *cctx;
92		130
93	/* the optional C context */	131	/* data associated with this coroutine (initial args) */
94	coro_stack *stack;	132	AV *args;
95	void *cursp;
96	int gencnt;	133	int refcnt;
97		134
98	/* optionally saved, might be zero */	135	/* optionally saved, might be zero */
99	AV *defav;	136	AV *defav;
100	SV *defsv;	137	SV *defsv;
101	SV *errsv;	138	SV *errsv;
…		…
131	OP **retstack;	168	OP **retstack;
132	I32 retstack_ix;	169	I32 retstack_ix;
133	I32 retstack_max;	170	I32 retstack_max;
134	PMOP *curpm;	171	PMOP *curpm;
135	COP *curcop;	172	COP *curcop;
136	JMPENV *top_env;
137		173
138	/* data associated with this coroutine (initial args) */	174	/* coro process data */
139	AV *args;	175	int prio;
140	};	176	};
141		177
142	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
144		180
145	/* mostly copied from op.c:cv_clone2 */	181	static AV *
146	STATIC AV *	182	coro_clone_padlist (CV *cv)
147	clone_padlist (pTHX_ AV *protopadlist)
148	{	183	{
149	AV *av;	184	AV *padlist = CvPADLIST (cv);
150	I32 ix;
151	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
152	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
153	SV **pname = AvARRAY (protopad_name);
154	SV **ppad = AvARRAY (protopad);
155	I32 fname = AvFILLp (protopad_name);
156	I32 fpad = AvFILLp (protopad);
157	AV *newpadlist, *newpad_name, *newpad;	185	AV *newpadlist, *newpad;
158	SV **npad;
159
160	newpad_name = newAV ();
161	for (ix = fname; ix >= 0; ix--)
162	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164	newpad = newAV ();
165	av_fill (newpad, AvFILLp (protopad));
166	npad = AvARRAY (newpad);
167		186
168	newpadlist = newAV ();	187	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
170	av_store (newpadlist, 0, (SV *) newpad_name);	189	#if PERL_VERSION_ATLEAST (5,9,0)
		190	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		191	#else
		192	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		193	#endif
		194	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		195	--AvFILLp (padlist);
		196
		197	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171	av_store (newpadlist, 1, (SV *) newpad);	198	av_store (newpadlist, 1, (SV *)newpad);
172
173	av = newAV (); /* will be @_ */
174	av_extend (av, 0);
175	av_store (newpad, 0, (SV *) av);
176	AvREIFY_on (av);
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char *name = SvPVX (namesv); /* XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV *kid = cv_clone((CV*)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		199
242	return newpadlist;	200	return newpadlist;
243	}	201	}
244		202
245	STATIC void	203	static void
246	free_padlist (pTHX_ AV *padlist)	204	free_padlist (AV *padlist)
247	{	205	{
248	/* may be during global destruction */	206	/* may be during global destruction */
249	if (SvREFCNT (padlist))	207	if (SvREFCNT (padlist))
250	{	208	{
251	I32 i = AvFILLp (padlist);	209	I32 i = AvFILLp (padlist);
…		…
264		222
265	SvREFCNT_dec ((SV*)padlist);	223	SvREFCNT_dec ((SV*)padlist);
266	}	224	}
267	}	225	}
268		226
269	STATIC int	227	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	228	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	229	{
272	AV *padlist;	230	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	231	AV *av = (AV *)mg->mg_obj;
274		232
275	/* casting is fun. */	233	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	235	free_padlist (padlist);
278		236
279	SvREFCNT_dec (av);	237	SvREFCNT_dec (av);
		238
		239	return 0;
280	}	240	}
281		241
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	242	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		243
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		245
286	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
287	STATIC void	247	static void
288	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
289	{	249	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291		251
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
294	else	254	else
		255	{
		256	#if 0
		257	/* this is probably cleaner, but also slower? */
		258	CV *cp = Perl_cv_clone (cv);
		259	CvPADLIST (cv) = CvPADLIST (cp);
		260	CvPADLIST (cp) = 0;
		261	SvREFCNT_dec (cp);
		262	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	263	CvPADLIST (cv) = coro_clone_padlist (cv);
		264	#endif
		265	}
296	}	266	}
297		267
298	STATIC void	268	static void
299	put_padlist (pTHX_ CV *cv)	269	put_padlist (CV *cv)
300	{	270	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302		272
303	if (!mg)	273	if (!mg)
304	{	274	{
…		…
312	}	282	}
313		283
314	#define SB do {	284	#define SB do {
315	#define SE } while (0)	285	#define SE } while (0)
316		286
317	#define LOAD(state) load_state(aTHX_ (state));	287	#define LOAD(state) load_state((state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	288	#define SAVE(state,flags) save_state((state),(flags));
319		289
320	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
321		291
322	static void	292	static void
323	load_state(pTHX_ Coro__State c)	293	load_state(Coro__State c)
324	{	294	{
325	PL_dowarn = c->dowarn;	295	PL_dowarn = c->dowarn;
326	PL_in_eval = c->in_eval;	296	PL_in_eval = c->in_eval;
327		297
328	PL_curstackinfo = c->curstackinfo;	298	PL_curstackinfo = c->curstackinfo;
…		…
346	PL_scopestack_ix = c->scopestack_ix;	316	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;	317	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;	318	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;	319	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;	320	PL_savestack_max = c->savestack_max;
351	#if PERL_VERSION < 9	321	#if !PERL_VERSION_ATLEAST (5,9,0)
352	PL_retstack = c->retstack;	322	PL_retstack = c->retstack;
353	PL_retstack_ix = c->retstack_ix;	323	PL_retstack_ix = c->retstack_ix;
354	PL_retstack_max = c->retstack_max;	324	PL_retstack_max = c->retstack_max;
355	#endif	325	#endif
356	PL_curpm = c->curpm;	326	PL_curpm = c->curpm;
357	PL_curcop = c->curcop;	327	PL_curcop = c->curcop;
358	PL_top_env = c->top_env;
359		328
360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	331	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
363		332
…		…
370	{	339	{
371	AV *padlist = (AV *)POPs;	340	AV *padlist = (AV *)POPs;
372		341
373	if (padlist)	342	if (padlist)
374	{	343	{
375	put_padlist (aTHX_ cv); /* mark this padlist as available */	344	put_padlist (cv); /* mark this padlist as available */
376	CvPADLIST(cv) = padlist;	345	CvPADLIST(cv) = padlist;
377	}	346	}
378		347
379	++CvDEPTH(cv);	348	++CvDEPTH(cv);
380	}	349	}
…		…
382	PUTBACK;	351	PUTBACK;
383	}	352	}
384	}	353	}
385		354
386	static void	355	static void
387	save_state(pTHX_ Coro__State c, int flags)	356	save_state(Coro__State c, int flags)
388	{	357	{
389	{	358	{
390	dSP;	359	dSP;
391	I32 cxix = cxstack_ix;	360	I32 cxix = cxstack_ix;
392	PERL_CONTEXT *ccstk = cxstack;	361	PERL_CONTEXT *ccstk = cxstack;
…		…
420	}	389	}
421		390
422	PUSHs ((SV *)CvPADLIST(cv));	391	PUSHs ((SV *)CvPADLIST(cv));
423	PUSHs ((SV *)cv);	392	PUSHs ((SV *)cv);
424		393
425	get_padlist (aTHX_ cv); /* this is a monster */	394	get_padlist (cv);
426	}	395	}
427	}	396	}
428	#ifdef CXt_FORMAT	397	#ifdef CXt_FORMAT
429	else if (CxTYPE(cx) == CXt_FORMAT)	398	else if (CxTYPE(cx) == CXt_FORMAT)
430	{	399	{
…		…
474	c->scopestack_ix = PL_scopestack_ix;	443	c->scopestack_ix = PL_scopestack_ix;
475	c->scopestack_max = PL_scopestack_max;	444	c->scopestack_max = PL_scopestack_max;
476	c->savestack = PL_savestack;	445	c->savestack = PL_savestack;
477	c->savestack_ix = PL_savestack_ix;	446	c->savestack_ix = PL_savestack_ix;
478	c->savestack_max = PL_savestack_max;	447	c->savestack_max = PL_savestack_max;
479	#if PERL_VERSION < 9	448	#if !PERL_VERSION_ATLEAST (5,9,0)
480	c->retstack = PL_retstack;	449	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;	450	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;	451	c->retstack_max = PL_retstack_max;
483	#endif	452	#endif
484	c->curpm = PL_curpm;	453	c->curpm = PL_curpm;
485	c->curcop = PL_curcop;	454	c->curcop = PL_curcop;
486	c->top_env = PL_top_env;
487	}	455	}
488		456
489	/*	457	/*
490	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
491	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
492	* on the (sometimes correct) assumption that coroutines do	460	* on the (sometimes correct) assumption that coroutines do
493	* not usually need a lot of stackspace.	461	* not usually need a lot of stackspace.
494	*/	462	*/
495	STATIC void	463	static void
496	coro_init_stacks (pTHX)	464	coro_init_stacks ()
497	{	465	{
498	LOCK;
499
500	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501	PL_curstackinfo->si_type = PERLSI_MAIN;	467	PL_curstackinfo->si_type = PERLSI_MAIN;
502	PL_curstack = PL_curstackinfo->si_stack;	468	PL_curstack = PL_curstackinfo->si_stack;
503	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504		470
…		…
525		491
526	New(54,PL_savestack,96,ANY);	492	New(54,PL_savestack,96,ANY);
527	PL_savestack_ix = 0;	493	PL_savestack_ix = 0;
528	PL_savestack_max = 96;	494	PL_savestack_max = 96;
529		495
530	#if PERL_VERSION < 9	496	#if !PERL_VERSION_ATLEAST (5,9,0)
531	New(54,PL_retstack,8,OP*);	497	New(54,PL_retstack,8,OP*);
532	PL_retstack_ix = 0;	498	PL_retstack_ix = 0;
533	PL_retstack_max = 8;	499	PL_retstack_max = 8;
534	#endif	500	#endif
535
536	UNLOCK;
537	}	501	}
538		502
539	/*	503	/*
540	* destroy the stacks, the callchain etc...	504	* destroy the stacks, the callchain etc...
541	*/	505	*/
542	STATIC void	506	static void
543	destroy_stacks(pTHX)	507	coro_destroy_stacks ()
544	{	508	{
545	if (!IN_DESTRUCT)	509	if (!IN_DESTRUCT)
546	{	510	{
547	/* is this ugly, I ask? */	511	/* is this ugly, I ask? */
548	LEAVE_SCOPE (0);	512	LEAVE_SCOPE (0);
…		…
579		543
580	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
581	Safefree (PL_markstack);	545	Safefree (PL_markstack);
582	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
583	Safefree (PL_savestack);	547	Safefree (PL_savestack);
584	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
585	Safefree (PL_retstack);	549	Safefree (PL_retstack);
586	#endif	550	#endif
587	}	551	}
588		552
589	static void	553	static void
590	allocate_stack (Coro__State ctx, int alloc)	554	setup_coro (struct coro *coro)
591	{
592	coro_stack *stack;
593
594	New (0, stack, 1, coro_stack);
595
596	stack->refcnt = 1;
597	stack->usecnt = 1;
598	stack->gencnt = ctx->gencnt = 0;
599
600	if (alloc)
601	{
602	#if HAVE_MMAP
603	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605	if (stack->sptr == (void *)-1)
606	#endif
607	{
608	/*FIXME*//*D*//* reasonable stack size! */
609	stack->ssize = - (STACKSIZE * sizeof (long));
610	New (0, stack->sptr, STACKSIZE, long);
611	}
612	}
613	else
614	stack->sptr = 0;
615
616	ctx->stack = stack;
617	}
618
619	static void
620	deallocate_stack (Coro__State ctx)
621	{
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{
628	if (!--stack->refcnt)
629	{
630	#ifdef HAVE_MMAP
631	if (stack->ssize > 0 && stack->sptr)
632	munmap (stack->sptr, stack->ssize);
633	else
634	#endif
635	Safefree (stack->sptr);
636
637	Safefree (stack);
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}
643
644	static void
645	setup_coro (void *arg)
646	{	555	{
647	/*	556	/*
648	* emulate part of the perl startup here.	557	* emulate part of the perl startup here.
649	*/	558	*/
650	dTHX;
651	dSP;
652	Coro__State ctx = (Coro__State)arg;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654		559
655	coro_init_stacks (aTHX);	560	coro_init_stacks ();
		561
656	/*PL_curcop = 0;*/	562	PL_curcop = 0;
657	/*PL_in_eval = PL_in_eval;*/ /* inherit */	563	PL_in_eval = 0;
		564	PL_curpm = 0;
		565
		566	{
		567	dSP;
		568	LOGOP myop;
		569
		570	/* I have no idea why this is needed, but it is */
		571	PUSHMARK (SP);
		572
658	SvREFCNT_dec (GvAV (PL_defgv));	573	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	574	GvAV (PL_defgv) = coro->args; coro->args = 0;
660		575
661	SPAGAIN;
662
663	if (ctx->stack)
664	{
665	ctx->cursp = 0;
666
667	PUSHMARK(SP);
668	PUTBACK;
669	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671	if (SvTRUE (ERRSV))
672	croak (NULL);
673	else
674	croak ("FATAL: CCTXT coroutine returned!");
675	}
676	else
677	{
678	UNOP myop;
679
680	PL_op = (OP *)&myop;
681
682	Zero(&myop, 1, UNOP);	576	Zero (&myop, 1, LOGOP);
683	myop.op_next = Nullop;	577	myop.op_next = Nullop;
684	myop.op_flags = OPf_WANT_VOID;	578	myop.op_flags = OPf_WANT_VOID;
685		579
		580	PL_op = (OP *)&myop;
		581
686	PUSHMARK(SP);	582	PUSHMARK (SP);
687	XPUSHs (sub_init);	583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
688	/*
689	* the next line is slightly wrong, as PL_op->op_next
690	* is actually being executed so we skip the first op.
691	* that doesn't matter, though, since it is only
692	* pp_nextstate and we never return...
693	* ah yes, and I don't care anyways ;)
694	*/
695	PUTBACK;	584	PUTBACK;
696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697	SPAGAIN;	586	SPAGAIN;
698		587
699	ENTER; /* necessary e.g. for dounwind */	588	ENTER; /* necessary e.g. for dounwind */
700	}	589	}
701	}	590	}
702		591
703	static void	592	static void
704	continue_coro (void *arg)	593	free_coro_mortal ()
705	{	594	{
706	/*
707	* this is a _very_ stripped down perl interpreter ;)
708	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711	JMPENV coro_start_env;
712
713	PL_top_env = &ctx->start_env;
714
715	ctx->cursp = 0;
716	PL_op = PL_op->op_next;
717	CALLRUNOPS(aTHX);
718
719	abort ();
720	}
721
722	STATIC void
723	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724	{
725	dSTACKLEVEL;
726
727	if (prev != next)
728	{
729	if (next->mainstack)
730	{
731	LOCK;
732	SAVE (prev, flags);
733	LOAD (next);
734	UNLOCK;
735
736	/* mark this state as in-use */
737	next->mainstack = 0;
738	next->tmps_ix = -2;
739
740	/* stacklevel changed? if yes, grab the stack for us! */
741	if (flags & TRANSFER_SAVE_CCTXT)
742	{
743	if (!prev->stack)
744	allocate_stack (prev, 0);
745	else if (prev->cursp != stacklevel
746	&& prev->stack->usecnt > 1)
747	{
748	prev->gencnt = ++prev->stack->gencnt;
749	prev->stack->usecnt = 1;
750	}
751
752	/* has our stack been invalidated? */
753	if (next->stack && next->stack->gencnt != next->gencnt)
754	{
755	deallocate_stack (next);
756	allocate_stack (next, 1);
757	coro_create (&(next->stack->cctx),
758	continue_coro, (void *)next,
759	next->stack->sptr, labs (next->stack->ssize));
760	}
761
762	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763	prev->cursp = stacklevel;
764	/* don't add any code here */
765	}
766	else
767	next->cursp = stacklevel;
768	}
769	else if (next->tmps_ix == -2)
770	croak ("tried to transfer to running coroutine");
771	else
772	{
773	LOCK;
774	SAVE (prev, -1); /* first get rid of the old state */
775	UNLOCK;
776
777	if (flags & TRANSFER_SAVE_CCTXT)
778	{
779	if (!prev->stack)
780	allocate_stack (prev, 0);
781
782	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783	{
784	PL_top_env = &next->start_env;
785
786	setup_coro (next);
787	next->cursp = stacklevel;
788
789	prev->stack->refcnt++;
790	prev->stack->usecnt++;
791	next->stack = prev->stack;
792	next->gencnt = prev->gencnt;
793	}
794	else
795	{
796	assert (!next->stack);
797	allocate_stack (next, 1);
798	coro_create (&(next->stack->cctx),
799	setup_coro, (void *)next,
800	next->stack->sptr, labs (next->stack->ssize));
801	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802	prev->cursp = stacklevel;
803	/* don't add any code here */
804	}
805	}
806	else
807	{
808	setup_coro (next);
809	next->cursp = stacklevel;
810	}
811	}
812	}
813
814	LOCK;
815	if (coro_mortal)	595	if (coro_mortal)
816	{	596	{
817	SvREFCNT_dec (coro_mortal);	597	SvREFCNT_dec (coro_mortal);
818	coro_mortal = 0;	598	coro_mortal = 0;
819	}	599	}
		600	}
		601
		602	static void NOINLINE
		603	prepare_cctx (coro_cctx *cctx)
		604	{
		605	dSP;
		606	LOGOP myop;
		607
		608	Zero (&myop, 1, LOGOP);
		609	myop.op_next = PL_op;
		610	myop.op_flags = OPf_WANT_VOID;
		611
		612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
		613
		614	PUSHMARK (SP);
		615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		616	PUTBACK;
		617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		618	SPAGAIN;
		619	}
		620
		621	static void
		622	coro_run (void *arg)
		623	{
		624	/* coro_run is the alternative epilogue of transfer() */
820	UNLOCK;	625	UNLOCK;
821	}
822		626
823	#define SV_CORO(sv,func) \	627	/*
824	do { \	628	* this is a _very_ stripped down perl interpreter ;)
825	if (SvROK (sv)) \	629	*/
826	sv = SvRV (sv); \	630	PL_top_env = &PL_start_env;
827	\	631	/* inject call to cctx_init */
828	if (SvTYPE (sv) == SVt_PVHV) \	632	prepare_cctx ((coro_cctx *)arg);
829	{ \
830	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831	\
832	if (!he) \
833	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834	\
835	(sv) = SvRV (HeVAL(he)); \
836	} \
837	\
838	/* must also be changed inside Coro::Cont::yield */ \
839	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841	\
842	} while(0)
843		633
844	#define SvSTATE(sv) (struct coro *)SvIV (sv)	634	/* somebody will hit me for both perl_run and PL_restartop */
		635	perl_run (PL_curinterp);
845		636
		637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		638	abort ();
		639	}
		640
		641	static coro_cctx *
		642	cctx_new ()
		643	{
		644	coro_cctx *cctx;
		645
		646	New (0, cctx, 1, coro_cctx);
		647
		648	#if HAVE_MMAP
		649
		650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		651	/* mmap suppsedly does allocate-on-write for us */
		652	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		653
		654	if (cctx->sptr == (void *)-1)
		655	{
		656	perror ("FATAL: unable to mmap stack for coroutine");
		657	_exit (EXIT_FAILURE);
		658	}
		659
		660	# if STACKGUARD
		661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		662	# endif
		663
		664	#else
		665
		666	cctx->ssize = STACKSIZE * (long)sizeof (long);
		667	New (0, cctx->sptr, STACKSIZE, long);
		668
		669	if (!cctx->sptr)
		670	{
		671	perror ("FATAL: unable to malloc stack for coroutine");
		672	_exit (EXIT_FAILURE);
		673	}
		674
		675	#endif
		676
		677	#if USE_VALGRIND
		678	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		679	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		680	cctx->ssize + (char *)cctx->sptr
		681	);
		682	#endif
		683
		684	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		685
		686	return cctx;
		687	}
		688
		689	static void
		690	cctx_free (coro_cctx *cctx)
		691	{
		692	if (!cctx)
		693	return;
		694
		695	#if USE_VALGRIND
		696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		697	#endif
		698
		699	#if HAVE_MMAP
		700	munmap (cctx->sptr, cctx->ssize);
		701	#else
		702	Safefree (cctx->sptr);
		703	#endif
		704
		705	Safefree (cctx);
		706	}
		707
		708	static coro_cctx *cctx_first;
		709	static int cctx_count, cctx_idle;
		710
		711	static coro_cctx *
		712	cctx_get ()
		713	{
		714	coro_cctx *cctx;
		715
		716	if (cctx_first)
		717	{
		718	--cctx_idle;
		719	cctx = cctx_first;
		720	cctx_first = cctx->next;
		721	}
		722	else
		723	{
		724	++cctx_count;
		725	cctx = cctx_new ();
		726	PL_op = PL_op->op_next;
		727	}
		728
		729	return cctx;
		730	}
		731
		732	static void
		733	cctx_put (coro_cctx *cctx)
		734	{
		735	++cctx_idle;
		736	cctx->next = cctx_first;
		737	cctx_first = cctx;
		738	}
		739
		740	/* never call directly, always through the coro_state_transfer global variable */
		741	static void NOINLINE
		742	transfer (struct coro *prev, struct coro *next, int flags)
		743	{
		744	dSTACKLEVEL;
		745
		746	/* sometimes transfer is only called to set idle_sp */
		747	if (flags == TRANSFER_SET_STACKLEVEL)
		748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		749	else if (prev != next)
		750	{
		751	coro_cctx *prev__cctx;
		752
		753	LOCK;
		754
		755	if (next->mainstack)
		756	{
		757	/* coroutine already started */
		758	SAVE (prev, flags);
		759	LOAD (next);
		760	}
		761	else
		762	{
		763	/* need to start coroutine */
		764	/* first get rid of the old state */
		765	SAVE (prev, -1);
		766	/* setup coroutine call */
		767	setup_coro (next);
		768	/* need a stack */
		769	next->cctx = 0;
		770	}
		771
		772	if (!prev->cctx)
		773	/* create a new empty context */
		774	Newz (0, prev->cctx, 1, coro_cctx);
		775
		776	prev__cctx = prev->cctx;
		777
		778	/* possibly "free" the cctx */
		779	if (prev__cctx->idle_sp == STACKLEVEL)
		780	{
		781	cctx_put (prev__cctx);
		782	prev->cctx = 0;
		783	}
		784
		785	if (!next->cctx)
		786	next->cctx = cctx_get ();
		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
		795	free_coro_mortal ();
		796
		797	UNLOCK;
		798	}
		799	}
		800
		801	struct transfer_args
		802	{
		803	struct coro *prev, *next;
		804	int flags;
		805	};
		806
		807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		808
		809	static void
		810	coro_state_destroy (struct coro *coro)
		811	{
		812	if (coro->refcnt--)
		813	return;
		814
		815	if (coro->mainstack && coro->mainstack != main_mainstack)
		816	{
		817	struct coro temp;
		818
		819	SAVE ((&temp), TRANSFER_SAVE_ALL);
		820	LOAD (coro);
		821
		822	coro_destroy_stacks ();
		823
		824	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		825
		826	coro->mainstack = 0;
		827	}
		828
		829	cctx_free (coro->cctx);
		830	SvREFCNT_dec (coro->args);
		831	Safefree (coro);
		832	}
		833
846	static void	834	static int
		835	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		836	{
		837	struct coro *coro = (struct coro *)mg->mg_ptr;
		838	mg->mg_ptr = 0;
		839
		840	coro_state_destroy (coro);
		841
		842	return 0;
		843	}
		844
		845	static int
		846	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		847	{
		848	struct coro *coro = (struct coro *)mg->mg_ptr;
		849
		850	++coro->refcnt;
		851
		852	return 0;
		853	}
		854
		855	static MGVTBL coro_state_vtbl = {
		856	0, 0, 0, 0,
		857	coro_state_clear,
		858	0,
		859	#ifdef MGf_DUP
		860	coro_state_dup,
		861	#else
		862	# define MGf_DUP 0
		863	#endif
		864	};
		865
		866	static struct coro *
		867	SvSTATE (SV *coro)
		868	{
		869	HV *stash;
		870	MAGIC *mg;
		871
		872	if (SvROK (coro))
		873	coro = SvRV (coro);
		874
		875	stash = SvSTASH (coro);
		876	if (stash != coro_stash && stash != coro_state_stash)
		877	{
		878	/* very slow, but rare, check */
		879	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		880	croak ("Coro::State object required");
		881	}
		882
		883	mg = SvMAGIC (coro);
		884	assert (mg->mg_type == PERL_MAGIC_ext);
		885	return (struct coro *)mg->mg_ptr;
		886	}
		887
		888	static void
		889	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		890	{
		891	ta->prev = SvSTATE (prev);
		892	ta->next = SvSTATE (next);
		893	ta->flags = flags;
		894	}
		895
		896	static void
847	api_transfer(pTHX_ SV *prev, SV *next, int flags)	897	api_transfer (SV *prev, SV *next, int flags)
848	{	898	{
849	SV_CORO (prev, "Coro::transfer");	899	dTHX;
850	SV_CORO (next, "Coro::transfer");	900	struct transfer_args ta;
851		901
852	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	902	prepare_transfer (&ta, prev, next, flags);
		903	TRANSFER (ta);
853	}	904	}
854		905
855	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
856		907
857	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
861	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
862	#define PRIO_MIN -4	913	#define PRIO_MIN -4
863		914
864	/* for Coro.pm */	915	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;	916	static GV *coro_current, *coro_idle;
866	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;	918	static int coro_nready;
868		919
869	static void	920	static void
870	coro_enq (pTHX_ SV *sv)	921	coro_enq (SV *sv)
871	{	922	{
		923	int prio;
		924
872	if (SvTYPE (sv) == SVt_PVHV)	925	if (SvTYPE (sv) != SVt_PVHV)
873	{
874	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
875	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
876
877	prio = prio > PRIO_MAX ? PRIO_MAX
878	: prio < PRIO_MIN ? PRIO_MIN
879	: prio;
880
881	av_push (coro_ready [prio - PRIO_MIN], sv);
882	coro_nready++;
883
884	return;
885	}
886
887	croak ("Coro::ready tried to enqueue something that is not a coroutine");	926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		927
		928	prio = SvSTATE (sv)->prio;
		929
		930	av_push (coro_ready [prio - PRIO_MIN], sv);
		931	coro_nready++;
888	}	932	}
889		933
890	static SV *	934	static SV *
891	coro_deq (pTHX_ int min_prio)	935	coro_deq (int min_prio)
892	{	936	{
893	int prio = PRIO_MAX - PRIO_MIN;	937	int prio = PRIO_MAX - PRIO_MIN;
894		938
895	min_prio -= PRIO_MIN;	939	min_prio -= PRIO_MIN;
896	if (min_prio < 0)	940	if (min_prio < 0)
897	min_prio = 0;	941	min_prio = 0;
898		942
899	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
900	if (av_len (coro_ready[prio]) >= 0)	944	if (AvFILLp (coro_ready [prio]) >= 0)
901	{	945	{
902	coro_nready--;	946	coro_nready--;
903	return av_shift (coro_ready[prio]);	947	return av_shift (coro_ready [prio]);
904	}	948	}
905		949
906	return 0;	950	return 0;
907	}	951	}
908		952
…		…
913		957
914	if (SvROK (coro))	958	if (SvROK (coro))
915	coro = SvRV (coro);	959	coro = SvRV (coro);
916		960
917	LOCK;	961	LOCK;
918	coro_enq (aTHX_ SvREFCNT_inc (coro));	962	coro_enq (SvREFCNT_inc (coro));
919	UNLOCK;	963	UNLOCK;
920	}	964	}
921		965
922	static void	966	static void
		967	prepare_schedule (struct transfer_args *ta)
		968	{
		969	SV *current, *prev, *next;
		970
		971	current = GvSV (coro_current);
		972
		973	for (;;)
		974	{
		975	LOCK;
		976	next = coro_deq (PRIO_MIN);
		977	UNLOCK;
		978
		979	if (next)
		980	break;
		981
		982	{
		983	dSP;
		984
		985	ENTER;
		986	SAVETMPS;
		987
		988	PUSHMARK (SP);
		989	PUTBACK;
		990	call_sv (GvSV (coro_idle), G_DISCARD);
		991
		992	FREETMPS;
		993	LEAVE;
		994	}
		995	}
		996
		997	prev = SvRV (current);
		998	SvRV (current) = next;
		999
		1000	/* free this only after the transfer */
		1001	LOCK;
		1002	free_coro_mortal ();
		1003	UNLOCK;
		1004	coro_mortal = prev;
		1005
		1006	ta->prev = SvSTATE (prev);
		1007	ta->next = SvSTATE (next);
		1008	ta->flags = TRANSFER_SAVE_ALL;
		1009	}
		1010
		1011	static void
		1012	prepare_cede (struct transfer_args *ta)
		1013	{
		1014	LOCK;
		1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1016	UNLOCK;
		1017
		1018	prepare_schedule (ta);
		1019	}
		1020
		1021	static void
923	api_schedule (void)	1022	api_schedule (void)
924	{	1023	{
925	dTHX;	1024	dTHX;
		1025	struct transfer_args ta;
926		1026
927	SV *prev, *next;	1027	prepare_schedule (&ta);
928		1028	TRANSFER (ta);
929	LOCK;
930
931	prev = SvRV (GvSV (coro_current));
932	next = coro_deq (aTHX_ PRIO_MIN);
933
934	if (!next)
935	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
936
937	/* free this only after the transfer */
938	coro_mortal = prev;
939	SV_CORO (prev, "Coro::schedule");
940
941	SvRV (GvSV (coro_current)) = next;
942
943	SV_CORO (next, "Coro::schedule");
944
945	UNLOCK;
946
947	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
948	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
949	}	1029	}
950		1030
951	static void	1031	static void
952	api_cede (void)	1032	api_cede (void)
953	{	1033	{
954	dTHX;	1034	dTHX;
		1035	struct transfer_args ta;
955		1036
956	LOCK;	1037	prepare_cede (&ta);
957	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1038	TRANSFER (ta);
958	UNLOCK;
959
960	api_schedule ();
961	}	1039	}
962		1040
963	MODULE = Coro::State PACKAGE = Coro::State	1041	MODULE = Coro::State PACKAGE = Coro::State
964		1042
965	PROTOTYPES: ENABLE	1043	PROTOTYPES: DISABLE
966		1044
967	BOOT:	1045	BOOT:
968	{ /* {} necessary for stoopid perl-5.6.x */	1046	{
969	#ifdef USE_ITHREADS	1047	#ifdef USE_ITHREADS
970	MUTEX_INIT (&coro_mutex);	1048	MUTEX_INIT (&coro_mutex);
971	#endif	1049	#endif
		1050	BOOT_PAGESIZE;
972		1051
973	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
974	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
975	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
976		1053
977	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
978	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
979	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
980	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
981		1057
982	main_mainstack = PL_mainstack;	1058	main_mainstack = PL_mainstack;
983		1059
984	coroapi.ver = CORO_API_VERSION;	1060	coroapi.ver = CORO_API_VERSION;
985	coroapi.transfer = api_transfer;	1061	coroapi.transfer = api_transfer;
986	}
987		1062
988	Coro::State	1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
989	_newprocess(args)	1064	}
990	SV * args	1065
991	PROTOTYPE: $	1066	SV *
		1067	new (char *klass, ...)
992	CODE:	1068	CODE:
993	Coro__State coro;	1069	{
		1070	struct coro *coro;
		1071	HV *hv;
		1072	int i;
994		1073
995	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
996	croak ("Coro::State::_newprocess expects an arrayref");
997
998	Newz (0, coro, 1, struct coro);	1074	Newz (0, coro, 1, struct coro);
		1075	coro->args = newAV ();
999		1076
1000	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1077	hv = newHV ();
1001	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1078	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1002	/*coro->stack = 0;*/	1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1003		1080
1004	/* same as JMPENV_BOOTSTRAP */	1081	for (i = 1; i < items; i++)
1005	/* we might be able to recycle start_env, but safe is safe */	1082	av_push (coro->args, newSVsv (ST (i)));
1006	/*Zero(&coro->start_env, 1, JMPENV);*/	1083	}
1007	coro->start_env.je_ret = -1;
1008	coro->start_env.je_mustcatch = TRUE;
1009
1010	RETVAL = coro;
1011	OUTPUT:	1084	OUTPUT:
1012	RETVAL	1085	RETVAL
1013		1086
1014	void	1087	void
1015	transfer(prev, next, flags)	1088	_set_stacklevel (...)
1016	SV *prev	1089	ALIAS:
1017	SV *next	1090	Coro::State::transfer = 1
1018	int flags	1091	Coro::schedule = 2
1019	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
1020	CODE:	1094	CODE:
1021	PUTBACK;	1095	{
1022	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
1023	SV_CORO (prev, "Coro::transfer");	1097
1024	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
1025	SPAGAIN;	1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1102	ta.next = 0;
		1103	ta.flags = TRANSFER_SET_STACKLEVEL;
		1104	break;
		1105
		1106	case 1:
		1107	if (items != 3)
		1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1109
		1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1111	break;
		1112
		1113	case 2:
		1114	prepare_schedule (&ta);
		1115	break;
		1116
		1117	case 3:
		1118	prepare_cede (&ta);
		1119	break;
		1120
		1121	case 4:
		1122	{
		1123	SV *yieldstack;
		1124	SV *sv;
		1125	AV *defav = GvAV (PL_defgv);
		1126
		1127	yieldstack = *hv_fetch (
		1128	(HV *)SvRV (GvSV (coro_current)),
		1129	"yieldstack", sizeof ("yieldstack") - 1,
		1130	0
		1131	);
		1132
		1133	/* set up @_ -- ugly */
		1134	av_clear (defav);
		1135	av_fill (defav, items - 1);
		1136	while (items--)
		1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1138
		1139	sv = av_pop ((AV *)SvRV (yieldstack));
		1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1142	ta.flags = 0;
		1143	SvREFCNT_dec (sv);
		1144	}
		1145	break;
		1146
		1147	}
		1148
		1149	TRANSFER (ta);
		1150	}
1026		1151
1027	void	1152	void
1028	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
1029	Coro::State coro	1154	CODE:
1030	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
1031		1157
1032	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1033	{
1034	struct coro temp;
1035		1159
1036	PUTBACK;	1160	++coro_src->refcnt;
1037	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1038	LOAD (aTHX_ coro);	1162	}
1039	SPAGAIN;
1040
1041	destroy_stacks (aTHX);
1042
1043	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1044	SPAGAIN;
1045
1046	coro->mainstack = 0;
1047	}
1048
1049	deallocate_stack (coro);
1050	SvREFCNT_dec (coro->args);
1051	Safefree (coro);
1052		1163
1053	void	1164	void
1054	_exit(code)	1165	_exit (code)
1055	int code	1166	int code
1056	PROTOTYPE: $	1167	PROTOTYPE: $
1057	CODE:	1168	CODE:
1058	_exit (code);	1169	_exit (code);
1059		1170
1060	MODULE = Coro::State PACKAGE = Coro::Cont	1171	int
		1172	cctx_count ()
		1173	CODE:
		1174	RETVAL = cctx_count;
		1175	OUTPUT:
		1176	RETVAL
1061		1177
1062	# this is slightly dirty (should expose a c-level api)	1178	int
1063		1179	cctx_idle ()
1064	void	1180	CODE:
1065	yield(...)	1181	RETVAL = cctx_idle;
1066	PROTOTYPE: @	1182	OUTPUT:
1067	CODE:	1183	RETVAL
1068	SV *yieldstack;
1069	SV *sv;
1070	AV *defav = GvAV (PL_defgv);
1071	struct coro *prev, *next;
1072
1073	yieldstack = *hv_fetch (
1074	(HV *)SvRV (GvSV (coro_current)),
1075	"yieldstack", sizeof ("yieldstack") - 1,
1076	0
1077	);
1078
1079	/* set up @_ -- ugly */
1080	av_clear (defav);
1081	av_fill (defav, items - 1);
1082	while (items--)
1083	av_store (defav, items, SvREFCNT_inc (ST(items)));
1084
1085	sv = av_pop ((AV *)SvRV (yieldstack));
1086	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1087	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1088	SvREFCNT_dec (sv);
1089
1090	transfer (aTHX_ prev, next, 0);
1091		1184
1092	MODULE = Coro::State PACKAGE = Coro	1185	MODULE = Coro::State PACKAGE = Coro
1093		1186
1094	# this is slightly dirty (should expose a c-level api)
1095
1096	BOOT:	1187	BOOT:
1097	{	1188	{
1098	int i;	1189	int i;
		1190
1099	HV *stash = gv_stashpv ("Coro", TRUE);	1191	coro_stash = gv_stashpv ("Coro", TRUE);
1100		1192
1101	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1102	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1103	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1104	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1105	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1106	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1107		1199
1108	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1109	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1110		1202
1111	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1119	coroapi.ready = api_ready;	1211	coroapi.ready = api_ready;
1120	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1121	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1122		1214
1123	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1124	sv_setiv(sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1125	SvREADONLY_on(sv);	1217	SvREADONLY_on (sv);
1126	}	1218	}
1127	}	1219	}
1128		1220
1129	#if !PERL_MICRO	1221	int
		1222	prio (Coro::State coro, int newprio = 0)
		1223	ALIAS:
		1224	nice = 1
		1225	CODE:
		1226	{
		1227	RETVAL = coro->prio;
		1228
		1229	if (items > 1)
		1230	{
		1231	if (ix)
		1232	newprio += coro->prio;
		1233
		1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1236
		1237	coro->prio = newprio;
		1238	}
		1239	}
1130		1240
1131	void	1241	void
1132	ready(self)	1242	ready (SV *self)
1133	SV * self
1134	PROTOTYPE: $	1243	PROTOTYPE: $
1135	CODE:	1244	CODE:
1136	api_ready (self);	1245	api_ready (self);
1137		1246
1138	#endif
1139
1140	int	1247	int
1141	nready(...)	1248	nready (...)
1142	PROTOTYPE:	1249	PROTOTYPE:
1143	CODE:	1250	CODE:
1144	RETVAL = coro_nready;	1251	RETVAL = coro_nready;
1145	OUTPUT:	1252	OUTPUT:
1146	RETVAL	1253	RETVAL
1147		1254
1148	void	1255	MODULE = Coro::State PACKAGE = Coro::AIO
1149	schedule(...)
1150	PROTOTYPE:
1151	CODE:
1152	api_schedule ();
1153		1256
1154	void
1155	cede(...)
1156	PROTOTYPE:
1157	CODE:
1158	api_cede ();
1159
1160	# and these are hacks
1161	SV *	1257	SV *
1162	_aio_get_state ()	1258	_get_state ()
1163	CODE:	1259	CODE:
1164	{	1260	{
1165	struct {	1261	struct {
1166	int errorno;	1262	int errorno;
1167	int laststype;	1263	int laststype;
…		…
1178	}	1274	}
1179	OUTPUT:	1275	OUTPUT:
1180	RETVAL	1276	RETVAL
1181		1277
1182	void	1278	void
1183	_aio_set_state (char *data_)	1279	_set_state (char *data_)
1184	PROTOTYPE: $	1280	PROTOTYPE: $
1185	CODE:	1281	CODE:
1186	{	1282	{
1187	struct {	1283	struct {
1188	int errorno;	1284	int errorno;

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