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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.76 by root, Thu Oct 26 08:45:56 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>
		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
33		50
34	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
35	# include <unistd.h>	52	# include <unistd.h>
36	# include <sys/mman.h>	53	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
40	# else	57	# else
41	# undef HAVE_MMAP	58	# undef HAVE_MMAP
42	# endif	59	# endif
43	# 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
44	#endif	68	# endif
45		69	#else
46	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
47	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
48		73
49	/* 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
50	* 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
51	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
53		79
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		81
56	#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))
57		89
58	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		93
60	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
66	# define UNLOCK (void)0	100	# define UNLOCK (void)0
67	#endif	101	#endif
68		102
69	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
75		107
76	/* this is actually not only the c stack but also c registers etc... */	108	/* this is a structure representing a c-level coroutine */
77	typedef struct {	109	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	110	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		111
82	coro_context cctx;	112	/* the stack */
83
84	void *sptr;	113	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	114	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		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 */
88	struct coro {	127	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	128	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	129	coro_cctx *cctx;
91		130
92	/* the optional C context */	131	/* data associated with this coroutine (initial args) */
93	coro_stack *stack;	132	AV *args;
94	void *cursp;
95	int gencnt;	133	int refcnt;
96		134
97	/* optionally saved, might be zero */	135	/* optionally saved, might be zero */
98	AV *defav;	136	AV *defav;
99	SV *defsv;	137	SV *defsv;
100	SV *errsv;	138	SV *errsv;
…		…
130	OP **retstack;	168	OP **retstack;
131	I32 retstack_ix;	169	I32 retstack_ix;
132	I32 retstack_max;	170	I32 retstack_max;
133	PMOP *curpm;	171	PMOP *curpm;
134	COP *curcop;	172	COP *curcop;
135	JMPENV *top_env;
136		173
137	/* data associated with this coroutine (initial args) */	174	/* coro process data */
138	AV *args;	175	int prio;
139	};	176	};
140		177
141	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
143		180
144	/* mostly copied from op.c:cv_clone2 */	181	static AV *
145	STATIC AV *	182	coro_clone_padlist (CV *cv)
146	clone_padlist (pTHX_ AV *protopadlist)
147	{	183	{
148	AV *av;	184	AV *padlist = CvPADLIST (cv);
149	I32 ix;
150	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
151	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
152	SV **pname = AvARRAY (protopad_name);
153	SV **ppad = AvARRAY (protopad);
154	I32 fname = AvFILLp (protopad_name);
155	I32 fpad = AvFILLp (protopad);
156	AV *newpadlist, *newpad_name, *newpad;	185	AV *newpadlist, *newpad;
157	SV **npad;
158
159	newpad_name = newAV ();
160	for (ix = fname; ix >= 0; ix--)
161	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163	newpad = newAV ();
164	av_fill (newpad, AvFILLp (protopad));
165	npad = AvARRAY (newpad);
166		186
167	newpadlist = newAV ();	187	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
169	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)));
170	av_store (newpadlist, 1, (SV *) newpad);	198	av_store (newpadlist, 1, (SV *)newpad);
171
172	av = newAV (); /* will be @_ */
173	av_extend (av, 0);
174	av_store (newpad, 0, (SV *) av);
175	AvREIFY_on (av);
176
177	for (ix = fpad; ix > 0; ix--)
178	{
179	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
180
181	if (namesv && namesv != &PL_sv_undef)
182	{
183	char *name = SvPVX (namesv); /* XXX */
184
185	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
186	{ /* lexical from outside? */
187	npad[ix] = SvREFCNT_inc (ppad[ix]);
188	}
189	else
190	{ /* our own lexical */
191	SV *sv;
192	if (*name == '&')
193	sv = SvREFCNT_inc (ppad[ix]);
194	else if (*name == '@')
195	sv = (SV *) newAV ();
196	else if (*name == '%')
197	sv = (SV *) newHV ();
198	else
199	sv = NEWSV (0, 0);
200
201	#ifdef SvPADBUSY
202	if (!SvPADBUSY (sv))
203	#endif
204	SvPADMY_on (sv);
205
206	npad[ix] = sv;
207	}
208	}
209	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210	{
211	npad[ix] = SvREFCNT_inc (ppad[ix]);
212	}
213	else
214	{
215	SV *sv = NEWSV (0, 0);
216	SvPADTMP_on (sv);
217	npad[ix] = sv;
218	}
219	}
220
221	#if 0 /* return -ENOTUNDERSTOOD */
222	/* Now that vars are all in place, clone nested closures. */
223
224	for (ix = fpad; ix > 0; ix--) {
225	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226	if (namesv
227	&& namesv != &PL_sv_undef
228	&& !(SvFLAGS(namesv) & SVf_FAKE)
229	&& *SvPVX(namesv) == '&'
230	&& CvCLONE(ppad[ix]))
231	{
232	CV *kid = cv_clone((CV*)ppad[ix]);
233	SvREFCNT_dec(ppad[ix]);
234	CvCLONE_on(kid);
235	SvPADMY_on(kid);
236	npad[ix] = (SV*)kid;
237	}
238	}
239	#endif
240		199
241	return newpadlist;	200	return newpadlist;
242	}	201	}
243		202
244	STATIC void	203	static void
245	free_padlist (pTHX_ AV *padlist)	204	free_padlist (AV *padlist)
246	{	205	{
247	/* may be during global destruction */	206	/* may be during global destruction */
248	if (SvREFCNT (padlist))	207	if (SvREFCNT (padlist))
249	{	208	{
250	I32 i = AvFILLp (padlist);	209	I32 i = AvFILLp (padlist);
…		…
263		222
264	SvREFCNT_dec ((SV*)padlist);	223	SvREFCNT_dec ((SV*)padlist);
265	}	224	}
266	}	225	}
267		226
268	STATIC int	227	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	228	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	229	{
271	AV *padlist;	230	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	231	AV *av = (AV *)mg->mg_obj;
273		232
274	/* casting is fun. */	233	/* casting is fun. */
275	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276	free_padlist (aTHX_ padlist);	235	free_padlist (padlist);
277		236
278	SvREFCNT_dec (av);	237	SvREFCNT_dec (av);
279		238
280	return 0;	239	return 0;
281	}	240	}
…		…
283	#define PERL_MAGIC_coro PERL_MAGIC_ext	242	#define PERL_MAGIC_coro PERL_MAGIC_ext
284		243
285	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
286		245
287	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
288	STATIC void	247	static void
289	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
290	{	249	{
291	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
292		251
293	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
294	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
295	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
296	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	263	CvPADLIST (cv) = coro_clone_padlist (cv);
		264	#endif
		265	}
297	}	266	}
298		267
299	STATIC void	268	static void
300	put_padlist (pTHX_ CV *cv)	269	put_padlist (CV *cv)
301	{	270	{
302	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
303		272
304	if (!mg)	273	if (!mg)
305	{	274	{
…		…
313	}	282	}
314		283
315	#define SB do {	284	#define SB do {
316	#define SE } while (0)	285	#define SE } while (0)
317		286
318	#define LOAD(state) load_state(aTHX_ (state));	287	#define LOAD(state) load_state((state));
319	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	288	#define SAVE(state,flags) save_state((state),(flags));
320		289
321	#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
322		291
323	static void	292	static void
324	load_state(pTHX_ Coro__State c)	293	load_state(Coro__State c)
325	{	294	{
326	PL_dowarn = c->dowarn;	295	PL_dowarn = c->dowarn;
327	PL_in_eval = c->in_eval;	296	PL_in_eval = c->in_eval;
328		297
329	PL_curstackinfo = c->curstackinfo;	298	PL_curstackinfo = c->curstackinfo;
…		…
347	PL_scopestack_ix = c->scopestack_ix;	316	PL_scopestack_ix = c->scopestack_ix;
348	PL_scopestack_max = c->scopestack_max;	317	PL_scopestack_max = c->scopestack_max;
349	PL_savestack = c->savestack;	318	PL_savestack = c->savestack;
350	PL_savestack_ix = c->savestack_ix;	319	PL_savestack_ix = c->savestack_ix;
351	PL_savestack_max = c->savestack_max;	320	PL_savestack_max = c->savestack_max;
352	#if PERL_VERSION < 9	321	#if !PERL_VERSION_ATLEAST (5,9,0)
353	PL_retstack = c->retstack;	322	PL_retstack = c->retstack;
354	PL_retstack_ix = c->retstack_ix;	323	PL_retstack_ix = c->retstack_ix;
355	PL_retstack_max = c->retstack_max;	324	PL_retstack_max = c->retstack_max;
356	#endif	325	#endif
357	PL_curpm = c->curpm;	326	PL_curpm = c->curpm;
358	PL_curcop = c->curcop;	327	PL_curcop = c->curcop;
359	PL_top_env = c->top_env;
360		328
361	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
362	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
363	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	331	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
364		332
…		…
371	{	339	{
372	AV *padlist = (AV *)POPs;	340	AV *padlist = (AV *)POPs;
373		341
374	if (padlist)	342	if (padlist)
375	{	343	{
376	put_padlist (aTHX_ cv); /* mark this padlist as available */	344	put_padlist (cv); /* mark this padlist as available */
377	CvPADLIST(cv) = padlist;	345	CvPADLIST(cv) = padlist;
378	}	346	}
379		347
380	++CvDEPTH(cv);	348	++CvDEPTH(cv);
381	}	349	}
…		…
383	PUTBACK;	351	PUTBACK;
384	}	352	}
385	}	353	}
386		354
387	static void	355	static void
388	save_state(pTHX_ Coro__State c, int flags)	356	save_state(Coro__State c, int flags)
389	{	357	{
390	{	358	{
391	dSP;	359	dSP;
392	I32 cxix = cxstack_ix;	360	I32 cxix = cxstack_ix;
393	PERL_CONTEXT *ccstk = cxstack;	361	PERL_CONTEXT *ccstk = cxstack;
…		…
421	}	389	}
422		390
423	PUSHs ((SV *)CvPADLIST(cv));	391	PUSHs ((SV *)CvPADLIST(cv));
424	PUSHs ((SV *)cv);	392	PUSHs ((SV *)cv);
425		393
426	get_padlist (aTHX_ cv); /* this is a monster */	394	get_padlist (cv);
427	}	395	}
428	}	396	}
429	#ifdef CXt_FORMAT	397	#ifdef CXt_FORMAT
430	else if (CxTYPE(cx) == CXt_FORMAT)	398	else if (CxTYPE(cx) == CXt_FORMAT)
431	{	399	{
…		…
475	c->scopestack_ix = PL_scopestack_ix;	443	c->scopestack_ix = PL_scopestack_ix;
476	c->scopestack_max = PL_scopestack_max;	444	c->scopestack_max = PL_scopestack_max;
477	c->savestack = PL_savestack;	445	c->savestack = PL_savestack;
478	c->savestack_ix = PL_savestack_ix;	446	c->savestack_ix = PL_savestack_ix;
479	c->savestack_max = PL_savestack_max;	447	c->savestack_max = PL_savestack_max;
480	#if PERL_VERSION < 9	448	#if !PERL_VERSION_ATLEAST (5,9,0)
481	c->retstack = PL_retstack;	449	c->retstack = PL_retstack;
482	c->retstack_ix = PL_retstack_ix;	450	c->retstack_ix = PL_retstack_ix;
483	c->retstack_max = PL_retstack_max;	451	c->retstack_max = PL_retstack_max;
484	#endif	452	#endif
485	c->curpm = PL_curpm;	453	c->curpm = PL_curpm;
486	c->curcop = PL_curcop;	454	c->curcop = PL_curcop;
487	c->top_env = PL_top_env;
488	}	455	}
489		456
490	/*	457	/*
491	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
492	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
493	* on the (sometimes correct) assumption that coroutines do	460	* on the (sometimes correct) assumption that coroutines do
494	* not usually need a lot of stackspace.	461	* not usually need a lot of stackspace.
495	*/	462	*/
496	STATIC void	463	static void
497	coro_init_stacks (pTHX)	464	coro_init_stacks ()
498	{	465	{
499	LOCK;
500
501	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
502	PL_curstackinfo->si_type = PERLSI_MAIN;	467	PL_curstackinfo->si_type = PERLSI_MAIN;
503	PL_curstack = PL_curstackinfo->si_stack;	468	PL_curstack = PL_curstackinfo->si_stack;
504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505		470
…		…
526		491
527	New(54,PL_savestack,96,ANY);	492	New(54,PL_savestack,96,ANY);
528	PL_savestack_ix = 0;	493	PL_savestack_ix = 0;
529	PL_savestack_max = 96;	494	PL_savestack_max = 96;
530		495
531	#if PERL_VERSION < 9	496	#if !PERL_VERSION_ATLEAST (5,9,0)
532	New(54,PL_retstack,8,OP*);	497	New(54,PL_retstack,8,OP*);
533	PL_retstack_ix = 0;	498	PL_retstack_ix = 0;
534	PL_retstack_max = 8;	499	PL_retstack_max = 8;
535	#endif	500	#endif
536
537	UNLOCK;
538	}	501	}
539		502
540	/*	503	/*
541	* destroy the stacks, the callchain etc...	504	* destroy the stacks, the callchain etc...
542	*/	505	*/
543	STATIC void	506	static void
544	destroy_stacks(pTHX)	507	coro_destroy_stacks ()
545	{	508	{
546	if (!IN_DESTRUCT)	509	if (!IN_DESTRUCT)
547	{	510	{
548	/* is this ugly, I ask? */	511	/* is this ugly, I ask? */
549	LEAVE_SCOPE (0);	512	LEAVE_SCOPE (0);
…		…
580		543
581	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
582	Safefree (PL_markstack);	545	Safefree (PL_markstack);
583	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
584	Safefree (PL_savestack);	547	Safefree (PL_savestack);
585	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
586	Safefree (PL_retstack);	549	Safefree (PL_retstack);
587	#endif	550	#endif
588	}	551	}
589		552
590	static void	553	static void
591	allocate_stack (Coro__State ctx, int alloc)	554	setup_coro (struct coro *coro)
592	{
593	coro_stack *stack;
594
595	New (0, stack, 1, coro_stack);
596
597	stack->refcnt = 1;
598	stack->usecnt = 1;
599	stack->gencnt = ctx->gencnt = 0;
600
601	if (alloc)
602	{
603	#if HAVE_MMAP
604	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
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	}
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
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
721	STATIC void
722	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
723	{
724	dSTACKLEVEL;
725
726	if (prev != next)
727	{
728	if (next->mainstack)
729	{
730	LOCK;
731	SAVE (prev, flags);
732	LOAD (next);
733	UNLOCK;
734
735	/* mark this state as in-use */
736	next->mainstack = 0;
737	next->tmps_ix = -2;
738
739	/* stacklevel changed? if yes, grab the stack for us! */
740	if (flags & TRANSFER_SAVE_CCTXT)
741	{
742	if (!prev->stack)
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	}
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
761	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
762	prev->cursp = stacklevel;
763	/* don't add any code here */
764	}
765	else
766	next->cursp = stacklevel;
767	}
768	else if (next->tmps_ix == -2)
769	croak ("tried to transfer to running coroutine");
770	else
771	{
772	LOCK;
773	SAVE (prev, -1); /* first get rid of the old state */
774	UNLOCK;
775
776	if (flags & TRANSFER_SAVE_CCTXT)
777	{
778	if (!prev->stack)
779	allocate_stack (prev, 0);
780
781	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
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);
796	allocate_stack (next, 1);
797	coro_create (&(next->stack->cctx),
798	setup_coro, (void *)next,
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 */
803	}
804	}
805	else
806	{
807	setup_coro (next);
808	next->cursp = stacklevel;
809	}
810	}
811	}
812
813	LOCK;
814	if (coro_mortal)	595	if (coro_mortal)
815	{	596	{
816	SvREFCNT_dec (coro_mortal);	597	SvREFCNT_dec (coro_mortal);
817	coro_mortal = 0;	598	coro_mortal = 0;
818	}	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() */
819	UNLOCK;	625	UNLOCK;
820	}
821		626
822	#define SV_CORO(sv,func) \	627	/*
823	do { \	628	* this is a _very_ stripped down perl interpreter ;)
824	if (SvROK (sv)) \	629	*/
825	sv = SvRV (sv); \	630	PL_top_env = &PL_start_env;
826	\	631	/* inject call to cctx_init */
827	if (SvTYPE (sv) == SVt_PVHV) \	632	prepare_cctx ((coro_cctx *)arg);
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		633
843	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	634	/* somebody will hit me for both perl_run and PL_restartop */
		635	perl_run (PL_curinterp);
844		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
845	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
846	api_transfer(pTHX_ SV *prev, SV *next, int flags)	897	api_transfer (SV *prev, SV *next, int flags)
847	{	898	{
848	SV_CORO (prev, "Coro::transfer");	899	dTHX;
849	SV_CORO (next, "Coro::transfer");	900	struct transfer_args ta;
850		901
851	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	902	prepare_transfer (&ta, prev, next, flags);
		903	TRANSFER (ta);
852	}	904	}
853		905
854	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
855		907
856	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
860	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
861	#define PRIO_MIN -4	913	#define PRIO_MIN -4
862		914
863	/* for Coro.pm */	915	/* for Coro.pm */
864	static GV *coro_current, *coro_idle;	916	static GV *coro_current, *coro_idle;
865	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
866	static int coro_nready;	918	static int coro_nready;
867		919
868	static void	920	static void
869	coro_enq (pTHX_ SV *sv)	921	coro_enq (SV *sv)
870	{	922	{
871	SV **xprio;
872	int prio;	923	int prio;
873		924
874	if (SvTYPE (sv) != SVt_PVHV)	925	if (SvTYPE (sv) != SVt_PVHV)
875	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");
876		927
877	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	928	prio = SvSTATE (sv)->prio;
878	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
879
880	prio = prio > PRIO_MAX ? PRIO_MAX
881	: prio < PRIO_MIN ? PRIO_MIN
882	: prio;
883		929
884	av_push (coro_ready [prio - PRIO_MIN], sv);	930	av_push (coro_ready [prio - PRIO_MIN], sv);
885	coro_nready++;	931	coro_nready++;
886	}	932	}
887		933
888	static SV *	934	static SV *
889	coro_deq (pTHX_ int min_prio)	935	coro_deq (int min_prio)
890	{	936	{
891	int prio = PRIO_MAX - PRIO_MIN;	937	int prio = PRIO_MAX - PRIO_MIN;
892		938
893	min_prio -= PRIO_MIN;	939	min_prio -= PRIO_MIN;
894	if (min_prio < 0)	940	if (min_prio < 0)
895	min_prio = 0;	941	min_prio = 0;
896		942
897	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
898	if (av_len (coro_ready[prio]) >= 0)	944	if (AvFILLp (coro_ready [prio]) >= 0)
899	{	945	{
900	coro_nready--;	946	coro_nready--;
901	return av_shift (coro_ready[prio]);	947	return av_shift (coro_ready [prio]);
902	}	948	}
903		949
904	return 0;	950	return 0;
905	}	951	}
906		952
…		…
911		957
912	if (SvROK (coro))	958	if (SvROK (coro))
913	coro = SvRV (coro);	959	coro = SvRV (coro);
914		960
915	LOCK;	961	LOCK;
916	coro_enq (aTHX_ SvREFCNT_inc (coro));	962	coro_enq (SvREFCNT_inc (coro));
917	UNLOCK;	963	UNLOCK;
918	}	964	}
919		965
920	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
921	api_schedule (void)	1022	api_schedule (void)
922	{	1023	{
923	dTHX;	1024	dTHX;
		1025	struct transfer_args ta;
924		1026
925	SV *prev, *next;	1027	prepare_schedule (&ta);
926		1028	TRANSFER (ta);
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	}	1029	}
948		1030
949	static void	1031	static void
950	api_cede (void)	1032	api_cede (void)
951	{	1033	{
952	dTHX;	1034	dTHX;
		1035	struct transfer_args ta;
953		1036
954	LOCK;	1037	prepare_cede (&ta);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1038	TRANSFER (ta);
956	UNLOCK;
957
958	api_schedule ();
959	}	1039	}
960		1040
961	MODULE = Coro::State PACKAGE = Coro::State	1041	MODULE = Coro::State PACKAGE = Coro::State
962		1042
963	PROTOTYPES: ENABLE	1043	PROTOTYPES: DISABLE
964		1044
965	BOOT:	1045	BOOT:
966	{ /* {} necessary for stoopid perl-5.6.x */	1046	{
967	#ifdef USE_ITHREADS	1047	#ifdef USE_ITHREADS
968	MUTEX_INIT (&coro_mutex);	1048	MUTEX_INIT (&coro_mutex);
969	#endif	1049	#endif
		1050	BOOT_PAGESIZE;
970		1051
971	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
972	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
973	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
974		1053
975	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
976	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
977	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
978	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
979		1057
980	main_mainstack = PL_mainstack;	1058	main_mainstack = PL_mainstack;
981		1059
982	coroapi.ver = CORO_API_VERSION;	1060	coroapi.ver = CORO_API_VERSION;
983	coroapi.transfer = api_transfer;	1061	coroapi.transfer = api_transfer;
984	}
985		1062
986	Coro::State	1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
987	_newprocess(args)	1064	}
988	SV * args	1065
989	PROTOTYPE: $	1066	SV *
		1067	new (char *klass, ...)
990	CODE:	1068	CODE:
991	Coro__State coro;	1069	{
		1070	struct coro *coro;
		1071	HV *hv;
		1072	int i;
992		1073
993	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
994	croak ("Coro::State::_newprocess expects an arrayref");
995
996	Newz (0, coro, 1, struct coro);	1074	Newz (0, coro, 1, struct coro);
		1075	coro->args = newAV ();
997		1076
998	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1077	hv = newHV ();
999	/*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;
1000	/*coro->stack = 0;*/	1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1001		1080
1002	/* same as JMPENV_BOOTSTRAP */	1081	for (i = 1; i < items; i++)
1003	/* we might be able to recycle start_env, but safe is safe */	1082	av_push (coro->args, newSVsv (ST (i)));
1004	/*Zero(&coro->start_env, 1, JMPENV);*/	1083	}
1005	coro->start_env.je_ret = -1;
1006	coro->start_env.je_mustcatch = TRUE;
1007
1008	RETVAL = coro;
1009	OUTPUT:	1084	OUTPUT:
1010	RETVAL	1085	RETVAL
1011		1086
1012	void	1087	void
1013	transfer(prev, next, flags)	1088	_set_stacklevel (...)
1014	SV *prev	1089	ALIAS:
1015	SV *next	1090	Coro::State::transfer = 1
1016	int flags	1091	Coro::schedule = 2
1017	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
1018	CODE:	1094	CODE:
1019	PUTBACK;	1095	{
1020	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
1021	SV_CORO (prev, "Coro::transfer");	1097
1022	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
1023	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	}
1024		1151
1025	void	1152	void
1026	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
1027	Coro::State coro	1154	CODE:
1028	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
1029		1157
1030	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1031	{
1032	struct coro temp;
1033		1159
1034	PUTBACK;	1160	++coro_src->refcnt;
1035	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;
1036	LOAD (aTHX_ coro);	1162	}
1037	SPAGAIN;
1038
1039	destroy_stacks (aTHX);
1040
1041	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1042	SPAGAIN;
1043
1044	coro->mainstack = 0;
1045	}
1046
1047	deallocate_stack (coro);
1048	SvREFCNT_dec (coro->args);
1049	Safefree (coro);
1050		1163
1051	void	1164	void
1052	_exit(code)	1165	_exit (code)
1053	int code	1166	int code
1054	PROTOTYPE: $	1167	PROTOTYPE: $
1055	CODE:	1168	CODE:
1056	_exit (code);	1169	_exit (code);
1057		1170
1058	MODULE = Coro::State PACKAGE = Coro::Cont	1171	int
		1172	cctx_count ()
		1173	CODE:
		1174	RETVAL = cctx_count;
		1175	OUTPUT:
		1176	RETVAL
1059		1177
1060	# this is slightly dirty (should expose a c-level api)	1178	int
1061		1179	cctx_idle ()
1062	void	1180	CODE:
1063	yield(...)	1181	RETVAL = cctx_idle;
1064	PROTOTYPE: @	1182	OUTPUT:
1065	CODE:	1183	RETVAL
1066	SV *yieldstack;
1067	SV *sv;
1068	AV *defav = GvAV (PL_defgv);
1069	struct coro *prev, *next;
1070
1071	yieldstack = *hv_fetch (
1072	(HV *)SvRV (GvSV (coro_current)),
1073	"yieldstack", sizeof ("yieldstack") - 1,
1074	0
1075	);
1076
1077	/* set up @_ -- ugly */
1078	av_clear (defav);
1079	av_fill (defav, items - 1);
1080	while (items--)
1081	av_store (defav, items, SvREFCNT_inc (ST(items)));
1082
1083	sv = av_pop ((AV *)SvRV (yieldstack));
1084	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1085	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1086	SvREFCNT_dec (sv);
1087
1088	transfer (aTHX_ prev, next, 0);
1089		1184
1090	MODULE = Coro::State PACKAGE = Coro	1185	MODULE = Coro::State PACKAGE = Coro
1091		1186
1092	# this is slightly dirty (should expose a c-level api)
1093
1094	BOOT:	1187	BOOT:
1095	{	1188	{
1096	int i;	1189	int i;
		1190
1097	HV *stash = gv_stashpv ("Coro", TRUE);	1191	coro_stash = gv_stashpv ("Coro", TRUE);
1098		1192
1099	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1100	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1101	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1102	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1103	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1104	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1105		1199
1106	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1107	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1108		1202
1109	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1117	coroapi.ready = api_ready;	1211	coroapi.ready = api_ready;
1118	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1119	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1120		1214
1121	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1122	sv_setiv(sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1123	SvREADONLY_on(sv);	1217	SvREADONLY_on (sv);
1124	}	1218	}
1125	}	1219	}
1126		1220
1127	#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	}
1128		1240
1129	void	1241	void
1130	ready(self)	1242	ready (SV *self)
1131	SV * self
1132	PROTOTYPE: $	1243	PROTOTYPE: $
1133	CODE:	1244	CODE:
1134	api_ready (self);	1245	api_ready (self);
1135		1246
1136	#endif
1137
1138	int	1247	int
1139	nready(...)	1248	nready (...)
1140	PROTOTYPE:	1249	PROTOTYPE:
1141	CODE:	1250	CODE:
1142	RETVAL = coro_nready;	1251	RETVAL = coro_nready;
1143	OUTPUT:	1252	OUTPUT:
1144	RETVAL	1253	RETVAL
1145		1254
1146	void	1255	MODULE = Coro::State PACKAGE = Coro::AIO
1147	schedule(...)
1148	PROTOTYPE:
1149	CODE:
1150	api_schedule ();
1151		1256
1152	void
1153	cede(...)
1154	PROTOTYPE:
1155	CODE:
1156	api_cede ();
1157
1158	# and these are hacks
1159	SV *	1257	SV *
1160	_aio_get_state ()	1258	_get_state ()
1161	CODE:	1259	CODE:
1162	{	1260	{
1163	struct {	1261	struct {
1164	int errorno;	1262	int errorno;
1165	int laststype;	1263	int laststype;
…		…
1176	}	1274	}
1177	OUTPUT:	1275	OUTPUT:
1178	RETVAL	1276	RETVAL
1179		1277
1180	void	1278	void
1181	_aio_set_state (char *data_)	1279	_set_state (char *data_)
1182	PROTOTYPE: $	1280	PROTOTYPE: $
1183	CODE:	1281	CODE:
1184	{	1282	{
1185	struct {	1283	struct {
1186	int errorno;	1284	int errorno;

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