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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.74 by root, Mon Oct 23 22:49:09 2006 UTC vs.
Revision 1.104 by root, Mon Nov 27 01:51:02 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
45	#endif	68	# endif
46		69	#endif
47	#define SUB_INIT "Coro::State::initialize"
48	#define UCORO_STATE "_coro_state"
49		70
50	/* The next macro should declare a variable stacklevel that contains and approximation	71	/* 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	72	* to the current C stack pointer. Its property is that it changes with each call
52	* and should be unique. */	73	* and should be unique. */
		74	#define dSTACKLEVEL int stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	75	#define STACKLEVEL ((void *)&stacklevel)
54		76
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	77	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		78
57	#define labs(l) ((l) >= 0 ? (l) : -(l))	79	#if __GNUC__ >= 3
		80	# define attribute(x) __attribute__(x)
		81	#else
		82	# define attribute(x)
		83	#endif
		84
		85	#define NOINLINE attribute ((noinline))
58		86
59	#include "CoroAPI.h"	87	#include "CoroAPI.h"
		88
		89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
60		90
61	#ifdef USE_ITHREADS	91	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	92	static perl_mutex coro_mutex;
63	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	93	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	94	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
67	# define UNLOCK (void)0	97	# define UNLOCK (void)0
68	#endif	98	#endif
69		99
70	static struct CoroAPI coroapi;	100	static struct CoroAPI coroapi;
71	static AV *main_mainstack; /* used to differentiate between $main and others */	101	static AV *main_mainstack; /* used to differentiate between $main and others */
72	static HV *coro_state_stash;	102	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 */	103	static SV *coro_mortal; /* will be freed after next transfer */
76		104
77	/* this is actually not only the c stack but also c registers etc... */	105	/* this is a structure representing a c-level coroutine */
78	typedef struct {	106	typedef struct coro_stack {
79	int refcnt; /* pointer reference counter */	107	struct coro_stack *next;
80	int usecnt; /* shared by how many coroutines */
81	int gencnt; /* generation counter */
82		108
83	coro_context cctx;	109	/* the stack */
84
85	void *sptr;	110	void *sptr;
86	long ssize; /* positive == mmap, otherwise malloc */	111	long ssize; /* positive == mmap, otherwise malloc */
		112
		113	/* cpu state */
		114	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		115	JMPENV *top_env;
		116	coro_context cctx;
		117
		118	#if USE_VALGRIND
		119	int valgrind_id;
		120	#endif
87	} coro_stack;	121	} coro_stack;
88		122
		123	/* this is a structure representing a perl-level coroutine */
89	struct coro {	124	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	125	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;
92
93	/* the optional C context */
94	coro_stack *stack;	126	coro_stack *stack;
95	void *cursp;	127
		128	/* data associated with this coroutine (initial args) */
		129	AV *args;
96	int gencnt;	130	int refcnt;
97		131
98	/* optionally saved, might be zero */	132	/* optionally saved, might be zero */
99	AV *defav;	133	AV *defav;
100	SV *defsv;	134	SV *defsv;
101	SV *errsv;	135	SV *errsv;
…		…
131	OP **retstack;	165	OP **retstack;
132	I32 retstack_ix;	166	I32 retstack_ix;
133	I32 retstack_max;	167	I32 retstack_max;
134	PMOP *curpm;	168	PMOP *curpm;
135	COP *curcop;	169	COP *curcop;
136	JMPENV *top_env;
137		170
138	/* data associated with this coroutine (initial args) */	171	/* coro process data */
139	AV *args;	172	int prio;
140	};	173	};
141		174
142	typedef struct coro *Coro__State;	175	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	176	typedef struct coro *Coro__State_or_hashref;
144		177
145	/* mostly copied from op.c:cv_clone2 */	178	static AV *
146	STATIC AV *	179	coro_clone_padlist (CV *cv)
147	clone_padlist (pTHX_ AV *protopadlist)
148	{	180	{
149	AV *av;	181	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;	182	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		183
168	newpadlist = newAV ();	184	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	185	AvREAL_off (newpadlist);
170	av_store (newpadlist, 0, (SV *) newpad_name);	186	#if PERL_VERSION_ATLEAST (5,9,0)
		187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		188	#else
		189	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		190	#endif
		191	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		192	--AvFILLp (padlist);
		193
		194	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171	av_store (newpadlist, 1, (SV *) newpad);	195	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		196
242	return newpadlist;	197	return newpadlist;
243	}	198	}
244		199
245	STATIC void	200	static void
246	free_padlist (pTHX_ AV *padlist)	201	free_padlist (AV *padlist)
247	{	202	{
248	/* may be during global destruction */	203	/* may be during global destruction */
249	if (SvREFCNT (padlist))	204	if (SvREFCNT (padlist))
250	{	205	{
251	I32 i = AvFILLp (padlist);	206	I32 i = AvFILLp (padlist);
…		…
264		219
265	SvREFCNT_dec ((SV*)padlist);	220	SvREFCNT_dec ((SV*)padlist);
266	}	221	}
267	}	222	}
268		223
269	STATIC int	224	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	225	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	226	{
272	AV *padlist;	227	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	228	AV *av = (AV *)mg->mg_obj;
274		229
275	/* casting is fun. */	230	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	232	free_padlist (padlist);
278		233
279	SvREFCNT_dec (av);	234	SvREFCNT_dec (av);
		235
		236	return 0;
280	}	237	}
281		238
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	239	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		240
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		242
286	/* the next two functions merely cache the padlists */	243	/* the next two functions merely cache the padlists */
287	STATIC void	244	static void
288	get_padlist (pTHX_ CV *cv)	245	get_padlist (CV *cv)
289	{	246	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291		248
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	250	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
294	else	251	else
		252	{
		253	#if 0
		254	/* this is probably cleaner, but also slower? */
		255	CV *cp = Perl_cv_clone (cv);
		256	CvPADLIST (cv) = CvPADLIST (cp);
		257	CvPADLIST (cp) = 0;
		258	SvREFCNT_dec (cp);
		259	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	260	CvPADLIST (cv) = coro_clone_padlist (cv);
		261	#endif
		262	}
296	}	263	}
297		264
298	STATIC void	265	static void
299	put_padlist (pTHX_ CV *cv)	266	put_padlist (CV *cv)
300	{	267	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	268	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302		269
303	if (!mg)	270	if (!mg)
304	{	271	{
…		…
312	}	279	}
313		280
314	#define SB do {	281	#define SB do {
315	#define SE } while (0)	282	#define SE } while (0)
316		283
317	#define LOAD(state) load_state(aTHX_ (state));	284	#define LOAD(state) load_state((state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	285	#define SAVE(state,flags) save_state((state),(flags));
319		286
320	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
321		288
322	static void	289	static void
323	load_state(pTHX_ Coro__State c)	290	load_state(Coro__State c)
324	{	291	{
325	PL_dowarn = c->dowarn;	292	PL_dowarn = c->dowarn;
326	PL_in_eval = c->in_eval;	293	PL_in_eval = c->in_eval;
327		294
328	PL_curstackinfo = c->curstackinfo;	295	PL_curstackinfo = c->curstackinfo;
…		…
346	PL_scopestack_ix = c->scopestack_ix;	313	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;	314	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;	315	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;	316	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;	317	PL_savestack_max = c->savestack_max;
351	#if PERL_VERSION < 9	318	#if !PERL_VERSION_ATLEAST (5,9,0)
352	PL_retstack = c->retstack;	319	PL_retstack = c->retstack;
353	PL_retstack_ix = c->retstack_ix;	320	PL_retstack_ix = c->retstack_ix;
354	PL_retstack_max = c->retstack_max;	321	PL_retstack_max = c->retstack_max;
355	#endif	322	#endif
356	PL_curpm = c->curpm;	323	PL_curpm = c->curpm;
357	PL_curcop = c->curcop;	324	PL_curcop = c->curcop;
358	PL_top_env = c->top_env;
359		325
360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	328	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
363		329
…		…
370	{	336	{
371	AV *padlist = (AV *)POPs;	337	AV *padlist = (AV *)POPs;
372		338
373	if (padlist)	339	if (padlist)
374	{	340	{
375	put_padlist (aTHX_ cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
376	CvPADLIST(cv) = padlist;	342	CvPADLIST(cv) = padlist;
377	}	343	}
378		344
379	++CvDEPTH(cv);	345	++CvDEPTH(cv);
380	}	346	}
…		…
382	PUTBACK;	348	PUTBACK;
383	}	349	}
384	}	350	}
385		351
386	static void	352	static void
387	save_state(pTHX_ Coro__State c, int flags)	353	save_state(Coro__State c, int flags)
388	{	354	{
389	{	355	{
390	dSP;	356	dSP;
391	I32 cxix = cxstack_ix;	357	I32 cxix = cxstack_ix;
392	PERL_CONTEXT *ccstk = cxstack;	358	PERL_CONTEXT *ccstk = cxstack;
…		…
420	}	386	}
421		387
422	PUSHs ((SV *)CvPADLIST(cv));	388	PUSHs ((SV *)CvPADLIST(cv));
423	PUSHs ((SV *)cv);	389	PUSHs ((SV *)cv);
424		390
425	get_padlist (aTHX_ cv); /* this is a monster */	391	get_padlist (cv);
426	}	392	}
427	}	393	}
428	#ifdef CXt_FORMAT	394	#ifdef CXt_FORMAT
429	else if (CxTYPE(cx) == CXt_FORMAT)	395	else if (CxTYPE(cx) == CXt_FORMAT)
430	{	396	{
…		…
474	c->scopestack_ix = PL_scopestack_ix;	440	c->scopestack_ix = PL_scopestack_ix;
475	c->scopestack_max = PL_scopestack_max;	441	c->scopestack_max = PL_scopestack_max;
476	c->savestack = PL_savestack;	442	c->savestack = PL_savestack;
477	c->savestack_ix = PL_savestack_ix;	443	c->savestack_ix = PL_savestack_ix;
478	c->savestack_max = PL_savestack_max;	444	c->savestack_max = PL_savestack_max;
479	#if PERL_VERSION < 9	445	#if !PERL_VERSION_ATLEAST (5,9,0)
480	c->retstack = PL_retstack;	446	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;	447	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;	448	c->retstack_max = PL_retstack_max;
483	#endif	449	#endif
484	c->curpm = PL_curpm;	450	c->curpm = PL_curpm;
485	c->curcop = PL_curcop;	451	c->curcop = PL_curcop;
486	c->top_env = PL_top_env;
487	}	452	}
488		453
489	/*	454	/*
490	* allocate various perl stacks. This is an exact copy	455	* allocate various perl stacks. This is an exact copy
491	* of perl.c:init_stacks, except that it uses less memory	456	* of perl.c:init_stacks, except that it uses less memory
492	* on the (sometimes correct) assumption that coroutines do	457	* on the (sometimes correct) assumption that coroutines do
493	* not usually need a lot of stackspace.	458	* not usually need a lot of stackspace.
494	*/	459	*/
495	STATIC void	460	static void
496	coro_init_stacks (pTHX)	461	coro_init_stacks ()
497	{	462	{
498	LOCK;
499
500	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
502	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
503	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504		467
…		…
525		488
526	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,96,ANY);
527	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
528	PL_savestack_max = 96;	491	PL_savestack_max = 96;
529		492
530	#if PERL_VERSION < 9	493	#if !PERL_VERSION_ATLEAST (5,9,0)
531	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,8,OP*);
532	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
533	PL_retstack_max = 8;	496	PL_retstack_max = 8;
534	#endif	497	#endif
535
536	UNLOCK;
537	}	498	}
538		499
539	/*	500	/*
540	* destroy the stacks, the callchain etc...	501	* destroy the stacks, the callchain etc...
541	*/	502	*/
542	STATIC void	503	static void
543	destroy_stacks(pTHX)	504	coro_destroy_stacks()
544	{	505	{
545	if (!IN_DESTRUCT)	506	if (!IN_DESTRUCT)
546	{	507	{
547	/* is this ugly, I ask? */	508	/* is this ugly, I ask? */
548	LEAVE_SCOPE (0);	509	LEAVE_SCOPE (0);
…		…
579		540
580	Safefree (PL_tmps_stack);	541	Safefree (PL_tmps_stack);
581	Safefree (PL_markstack);	542	Safefree (PL_markstack);
582	Safefree (PL_scopestack);	543	Safefree (PL_scopestack);
583	Safefree (PL_savestack);	544	Safefree (PL_savestack);
584	#if PERL_VERSION < 9	545	#if !PERL_VERSION_ATLEAST (5,9,0)
585	Safefree (PL_retstack);	546	Safefree (PL_retstack);
586	#endif	547	#endif
587	}	548	}
588		549
589	static void	550	static void
590	allocate_stack (Coro__State ctx, int alloc)	551	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	{	552	{
647	/*	553	/*
648	* emulate part of the perl startup here.	554	* emulate part of the perl startup here.
649	*/	555	*/
650	dTHX;
651	dSP;
652	Coro__State ctx = (Coro__State)arg;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654		556
655	coro_init_stacks (aTHX);	557	coro_init_stacks ();
		558
656	/*PL_curcop = 0;*/	559	PL_curcop = 0;
657	/*PL_in_eval = PL_in_eval;*/ /* inherit */	560	PL_in_eval = 0;
		561	PL_curpm = 0;
		562
		563	{
		564	dSP;
		565	LOGOP myop;
		566
		567	/* I have no idea why this is needed, but it is */
		568	PUSHMARK (SP);
		569
658	SvREFCNT_dec (GvAV (PL_defgv));	570	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	571	GvAV (PL_defgv) = coro->args; coro->args = 0;
660		572
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);	573	Zero (&myop, 1, LOGOP);
683	myop.op_next = Nullop;	574	myop.op_next = Nullop;
684	myop.op_flags = OPf_WANT_VOID;	575	myop.op_flags = OPf_WANT_VOID;
685		576
		577	PL_op = (OP *)&myop;
		578
686	PUSHMARK(SP);	579	PUSHMARK (SP);
687	XPUSHs (sub_init);	580	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;	581	PUTBACK;
696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697	SPAGAIN;	583	SPAGAIN;
698		584
699	ENTER; /* necessary e.g. for dounwind */	585	ENTER; /* necessary e.g. for dounwind */
700	}	586	}
701	}	587	}
702		588
703	static void	589	static void
704	continue_coro (void *arg)	590	free_coro_mortal ()
705	{	591	{
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)	592	if (coro_mortal)
816	{	593	{
817	SvREFCNT_dec (coro_mortal);	594	SvREFCNT_dec (coro_mortal);
818	coro_mortal = 0;	595	coro_mortal = 0;
819	}	596	}
		597	}
		598
		599	static void NOINLINE
		600	prepare_cctx (coro_stack *cctx)
		601	{
		602	dSP;
		603	LOGOP myop;
		604
		605	Zero (&myop, 1, LOGOP);
		606	myop.op_next = PL_op;
		607	myop.op_flags = OPf_WANT_VOID;
		608
		609	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
		610
		611	PUSHMARK (SP);
		612	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		613	PUTBACK;
		614	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		615	SPAGAIN;
		616	}
		617
		618	static void
		619	coro_run (void *arg)
		620	{
		621	/* coro_run is the alternative epilogue of transfer() */
820	UNLOCK;	622	UNLOCK;
821	}
822		623
823	#define SV_CORO(sv,func) \	624	/*
824	do { \	625	* this is a _very_ stripped down perl interpreter ;)
825	if (SvROK (sv)) \	626	*/
826	sv = SvRV (sv); \	627	PL_top_env = &PL_start_env;
827	\	628	/* inject call to cctx_init */
828	if (SvTYPE (sv) == SVt_PVHV) \	629	prepare_cctx ((coro_stack *)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		630
844	#define SvSTATE(sv) (struct coro *)SvIV (sv)	631	/* somebody will hit me for both perl_run and PL_restartop */
		632	perl_run (PL_curinterp);
845		633
		634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		635	abort ();
		636	}
		637
		638	static coro_stack *
		639	stack_new ()
		640	{
		641	coro_stack *stack;
		642
		643	New (0, stack, 1, coro_stack);
		644
		645	#if HAVE_MMAP
		646
		647	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		648	/* mmap suppsedly does allocate-on-write for us */
		649	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		650
		651	if (stack->sptr == (void *)-1)
		652	{
		653	perror ("FATAL: unable to mmap stack for coroutine");
		654	_exit (EXIT_FAILURE);
		655	}
		656
		657	# if STACKGUARD
		658	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		659	# endif
		660
		661	#else
		662
		663	stack->ssize = STACKSIZE * (long)sizeof (long);
		664	New (0, stack->sptr, STACKSIZE, long);
		665
		666	if (!stack->sptr)
		667	{
		668	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		669	_exit (EXIT_FAILURE);
		670	}
		671
		672	#endif
		673
		674	#if USE_VALGRIND
		675	stack->valgrind_id = VALGRIND_STACK_REGISTER (
		676	STACKGUARD * PAGESIZE + (char *)stack->sptr,
		677	stack->ssize + (char *)stack->sptr
		678	);
		679	#endif
		680
		681	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		682
		683	return stack;
		684	}
		685
		686	static void
		687	stack_free (coro_stack *stack)
		688	{
		689	if (!stack)
		690	return;
		691
		692	#if USE_VALGRIND
		693	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
		694	#endif
		695
		696	#if HAVE_MMAP
		697	munmap (stack->sptr, stack->ssize);
		698	#else
		699	Safefree (stack->sptr);
		700	#endif
		701
		702	Safefree (stack);
		703	}
		704
		705	static coro_stack *stack_first;
		706	static int cctx_count, cctx_idle;
		707
		708	static coro_stack *
		709	stack_get ()
		710	{
		711	coro_stack *stack;
		712
		713	if (stack_first)
		714	{
		715	--cctx_idle;
		716	stack = stack_first;
		717	stack_first = stack->next;
		718	}
		719	else
		720	{
		721	++cctx_count;
		722	stack = stack_new ();
		723	PL_op = PL_op->op_next;
		724	}
		725
		726	return stack;
		727	}
		728
		729	static void
		730	stack_put (coro_stack *stack)
		731	{
		732	++cctx_idle;
		733	stack->next = stack_first;
		734	stack_first = stack;
		735	}
		736
		737	/* never call directly, always through the coro_state_transfer global variable */
		738	static void NOINLINE
		739	transfer (struct coro *prev, struct coro *next, int flags)
		740	{
		741	dSTACKLEVEL;
		742
		743	/* sometimes transfer is only called to set idle_sp */
		744	if (flags == TRANSFER_SET_STACKLEVEL)
		745	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		746	else if (prev != next)
		747	{
		748	coro_stack *prev__stack;
		749
		750	LOCK;
		751
		752	if (next->mainstack)
		753	{
		754	/* coroutine already started */
		755	SAVE (prev, flags);
		756	LOAD (next);
		757	}
		758	else
		759	{
		760	/* need to start coroutine */
		761	/* first get rid of the old state */
		762	SAVE (prev, -1);
		763	/* setup coroutine call */
		764	setup_coro (next);
		765	/* need a stack */
		766	next->stack = 0;
		767	}
		768
		769	if (!prev->stack)
		770	/* create a new empty context */
		771	Newz (0, prev->stack, 1, coro_stack);
		772
		773	prev__stack = prev->stack;
		774
		775	/* possibly "free" the stack */
		776	if (prev__stack->idle_sp == STACKLEVEL)
		777	{
		778	stack_put (prev__stack);
		779	prev->stack = 0;
		780	}
		781
		782	if (!next->stack)
		783	next->stack = stack_get ();
		784
		785	if (prev__stack != next->stack)
		786	{
		787	prev__stack->top_env = PL_top_env;
		788	PL_top_env = next->stack->top_env;
		789	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		790	}
		791
		792	free_coro_mortal ();
		793
		794	UNLOCK;
		795	}
		796	}
		797
		798	struct transfer_args
		799	{
		800	struct coro *prev, *next;
		801	int flags;
		802	};
		803
		804	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		805
		806	static void
		807	coro_state_destroy (struct coro *coro)
		808	{
		809	if (coro->refcnt--)
		810	return;
		811
		812	if (coro->mainstack && coro->mainstack != main_mainstack)
		813	{
		814	struct coro temp;
		815
		816	SAVE ((&temp), TRANSFER_SAVE_ALL);
		817	LOAD (coro);
		818
		819	coro_destroy_stacks ();
		820
		821	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		822
		823	coro->mainstack = 0;
		824	}
		825
		826	stack_free (coro->stack);
		827	SvREFCNT_dec (coro->args);
		828	Safefree (coro);
		829	}
		830
846	static void	831	static int
		832	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		833	{
		834	struct coro *coro = (struct coro *)mg->mg_ptr;
		835	mg->mg_ptr = 0;
		836
		837	coro_state_destroy (coro);
		838
		839	return 0;
		840	}
		841
		842	static int
		843	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		844	{
		845	struct coro *coro = (struct coro *)mg->mg_ptr;
		846
		847	++coro->refcnt;
		848
		849	return 0;
		850	}
		851
		852	static MGVTBL coro_state_vtbl = {
		853	0, 0, 0, 0,
		854	coro_state_clear,
		855	0,
		856	#ifdef MGf_DUP
		857	coro_state_dup,
		858	#else
		859	# define MGf_DUP 0
		860	#endif
		861	};
		862
		863	static struct coro *
		864	SvSTATE (SV *coro)
		865	{
		866	HV *stash;
		867	MAGIC *mg;
		868
		869	if (SvROK (coro))
		870	coro = SvRV (coro);
		871
		872	stash = SvSTASH (coro);
		873	if (stash != coro_stash && stash != coro_state_stash)
		874	{
		875	/* very slow, but rare, check */
		876	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		877	croak ("Coro::State object required");
		878	}
		879
		880	mg = SvMAGIC (coro);
		881	assert (mg->mg_type == PERL_MAGIC_ext);
		882	return (struct coro *)mg->mg_ptr;
		883	}
		884
		885	static void
		886	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		887	{
		888	ta->prev = SvSTATE (prev);
		889	ta->next = SvSTATE (next);
		890	ta->flags = flags;
		891	}
		892
		893	static void
847	api_transfer(pTHX_ SV *prev, SV *next, int flags)	894	api_transfer (SV *prev, SV *next, int flags)
848	{	895	{
849	SV_CORO (prev, "Coro::transfer");	896	dTHX;
850	SV_CORO (next, "Coro::transfer");	897	struct transfer_args ta;
851		898
852	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	899	prepare_transfer (&ta, prev, next, flags);
		900	TRANSFER (ta);
853	}	901	}
854		902
855	/** Coro ********************************************************************/	903	/** Coro ********************************************************************/
856		904
857	#define PRIO_MAX 3	905	#define PRIO_MAX 3
…		…
861	#define PRIO_IDLE -3	909	#define PRIO_IDLE -3
862	#define PRIO_MIN -4	910	#define PRIO_MIN -4
863		911
864	/* for Coro.pm */	912	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;	913	static GV *coro_current, *coro_idle;
866	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;	915	static int coro_nready;
868		916
869	static void	917	static void
870	coro_enq (pTHX_ SV *sv)	918	coro_enq (SV *sv)
871	{	919	{
872	SV **xprio;
873	int prio;	920	int prio;
874		921
875	if (SvTYPE (sv) != SVt_PVHV)	922	if (SvTYPE (sv) != SVt_PVHV)
876	croak ("Coro::ready tried to enqueue something that is not a coroutine");	923	croak ("Coro::ready tried to enqueue something that is not a coroutine");
877		924
878	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	925	prio = SvSTATE (sv)->prio;
879	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
880
881	prio = prio > PRIO_MAX ? PRIO_MAX
882	: prio < PRIO_MIN ? PRIO_MIN
883	: prio;
884		926
885	av_push (coro_ready [prio - PRIO_MIN], sv);	927	av_push (coro_ready [prio - PRIO_MIN], sv);
886	coro_nready++;	928	coro_nready++;
887	}	929	}
888		930
889	static SV *	931	static SV *
890	coro_deq (pTHX_ int min_prio)	932	coro_deq (int min_prio)
891	{	933	{
892	int prio = PRIO_MAX - PRIO_MIN;	934	int prio = PRIO_MAX - PRIO_MIN;
893		935
894	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
895	if (min_prio < 0)	937	if (min_prio < 0)
896	min_prio = 0;	938	min_prio = 0;
897		939
898	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
899	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
900	{	942	{
901	coro_nready--;	943	coro_nready--;
902	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
903	}	945	}
904		946
905	return 0;	947	return 0;
906	}	948	}
907		949
…		…
912		954
913	if (SvROK (coro))	955	if (SvROK (coro))
914	coro = SvRV (coro);	956	coro = SvRV (coro);
915		957
916	LOCK;	958	LOCK;
917	coro_enq (aTHX_ SvREFCNT_inc (coro));	959	coro_enq (SvREFCNT_inc (coro));
918	UNLOCK;	960	UNLOCK;
919	}	961	}
920		962
921	static void	963	static void
		964	prepare_schedule (struct transfer_args *ta)
		965	{
		966	SV *current, *prev, *next;
		967
		968	current = GvSV (coro_current);
		969
		970	for (;;)
		971	{
		972	LOCK;
		973	next = coro_deq (PRIO_MIN);
		974	UNLOCK;
		975
		976	if (next)
		977	break;
		978
		979	{
		980	dSP;
		981
		982	ENTER;
		983	SAVETMPS;
		984
		985	PUSHMARK (SP);
		986	PUTBACK;
		987	call_sv (GvSV (coro_idle), G_DISCARD);
		988
		989	FREETMPS;
		990	LEAVE;
		991	}
		992	}
		993
		994	prev = SvRV (current);
		995	SvRV (current) = next;
		996
		997	/* free this only after the transfer */
		998	LOCK;
		999	free_coro_mortal ();
		1000	UNLOCK;
		1001	coro_mortal = prev;
		1002
		1003	ta->prev = SvSTATE (prev);
		1004	ta->next = SvSTATE (next);
		1005	ta->flags = TRANSFER_SAVE_ALL;
		1006	}
		1007
		1008	static void
		1009	prepare_cede (struct transfer_args *ta)
		1010	{
		1011	LOCK;
		1012	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1013	UNLOCK;
		1014
		1015	prepare_schedule (ta);
		1016	}
		1017
		1018	static void
922	api_schedule (void)	1019	api_schedule (void)
923	{	1020	{
924	dTHX;	1021	dTHX;
		1022	struct transfer_args ta;
925		1023
926	SV *prev, *next;	1024	prepare_schedule (&ta);
927		1025	TRANSFER (ta);
928	LOCK;
929
930	prev = SvRV (GvSV (coro_current));
931	next = coro_deq (aTHX_ PRIO_MIN);
932
933	if (!next)
934	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
935
936	/* free this only after the transfer */
937	coro_mortal = prev;
938	SV_CORO (prev, "Coro::schedule");
939
940	SvRV (GvSV (coro_current)) = next;
941
942	SV_CORO (next, "Coro::schedule");
943
944	UNLOCK;
945
946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
947	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
948	}	1026	}
949		1027
950	static void	1028	static void
951	api_cede (void)	1029	api_cede (void)
952	{	1030	{
953	dTHX;	1031	dTHX;
		1032	struct transfer_args ta;
954		1033
955	LOCK;	1034	prepare_cede (&ta);
956	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1035	TRANSFER (ta);
957	UNLOCK;
958
959	api_schedule ();
960	}	1036	}
961		1037
962	MODULE = Coro::State PACKAGE = Coro::State	1038	MODULE = Coro::State PACKAGE = Coro::State
963		1039
964	PROTOTYPES: ENABLE	1040	PROTOTYPES: DISABLE
965		1041
966	BOOT:	1042	BOOT:
967	{ /* {} necessary for stoopid perl-5.6.x */	1043	{
968	#ifdef USE_ITHREADS	1044	#ifdef USE_ITHREADS
969	MUTEX_INIT (&coro_mutex);	1045	MUTEX_INIT (&coro_mutex);
970	#endif	1046	#endif
		1047	BOOT_PAGESIZE;
971		1048
972	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
973	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
974	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
975		1050
976	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
977	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
978	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
979	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
980		1054
981	main_mainstack = PL_mainstack;	1055	main_mainstack = PL_mainstack;
982		1056
983	coroapi.ver = CORO_API_VERSION;	1057	coroapi.ver = CORO_API_VERSION;
984	coroapi.transfer = api_transfer;	1058	coroapi.transfer = api_transfer;
985	}
986		1059
987	Coro::State	1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
988	_newprocess(args)	1061	}
989	SV * args	1062
990	PROTOTYPE: $	1063	SV *
		1064	new (char *klass, ...)
991	CODE:	1065	CODE:
992	Coro__State coro;	1066	{
		1067	struct coro *coro;
		1068	HV *hv;
		1069	int i;
993		1070
994	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
995	croak ("Coro::State::_newprocess expects an arrayref");
996
997	Newz (0, coro, 1, struct coro);	1071	Newz (0, coro, 1, struct coro);
		1072	coro->args = newAV ();
998		1073
999	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1074	hv = newHV ();
		1075	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1076	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1077
		1078	for (i = 1; i < items; i++)
		1079	av_push (coro->args, newSVsv (ST (i)));
		1080
1000	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1001	/*coro->stack = 0;*/	1082	/*coro->stack = 0;*/
1002		1083	}
1003	/* same as JMPENV_BOOTSTRAP */
1004	/* we might be able to recycle start_env, but safe is safe */
1005	/*Zero(&coro->start_env, 1, JMPENV);*/
1006	coro->start_env.je_ret = -1;
1007	coro->start_env.je_mustcatch = TRUE;
1008
1009	RETVAL = coro;
1010	OUTPUT:	1084	OUTPUT:
1011	RETVAL	1085	RETVAL
1012		1086
1013	void	1087	void
1014	transfer(prev, next, flags)	1088	_set_stacklevel (...)
1015	SV *prev	1089	ALIAS:
1016	SV *next	1090	Coro::State::transfer = 1
1017	int flags	1091	Coro::schedule = 2
1018	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
1019	CODE:	1094	CODE:
1020	PUTBACK;	1095	{
1021	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
1022	SV_CORO (prev, "Coro::transfer");	1097
1023	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
1024	SPAGAIN;	1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_stack *, 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	}
1025		1151
1026	void	1152	void
1027	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
1028	Coro::State coro	1154	CODE:
1029	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
1030		1157
1031	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1032	{
1033	struct coro temp;
1034		1159
1035	PUTBACK;	1160	++coro_src->refcnt;
1036	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;
1037	LOAD (aTHX_ coro);	1162	}
1038	SPAGAIN;
1039
1040	destroy_stacks (aTHX);
1041
1042	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1043	SPAGAIN;
1044
1045	coro->mainstack = 0;
1046	}
1047
1048	deallocate_stack (coro);
1049	SvREFCNT_dec (coro->args);
1050	Safefree (coro);
1051		1163
1052	void	1164	void
1053	_exit(code)	1165	_exit (code)
1054	int code	1166	int code
1055	PROTOTYPE: $	1167	PROTOTYPE: $
1056	CODE:	1168	CODE:
1057	_exit (code);	1169	_exit (code);
1058		1170
1059	MODULE = Coro::State PACKAGE = Coro::Cont
1060
1061	# this is slightly dirty (should expose a c-level api)
1062
1063	void
1064	yield(...)
1065	PROTOTYPE: @
1066	CODE:
1067	SV *yieldstack;
1068	SV *sv;
1069	AV *defav = GvAV (PL_defgv);
1070	struct coro *prev, *next;
1071
1072	yieldstack = *hv_fetch (
1073	(HV *)SvRV (GvSV (coro_current)),
1074	"yieldstack", sizeof ("yieldstack") - 1,
1075	0
1076	);
1077
1078	/* set up @_ -- ugly */
1079	av_clear (defav);
1080	av_fill (defav, items - 1);
1081	while (items--)
1082	av_store (defav, items, SvREFCNT_inc (ST(items)));
1083
1084	sv = av_pop ((AV *)SvRV (yieldstack));
1085	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1086	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1087	SvREFCNT_dec (sv);
1088
1089	transfer (aTHX_ prev, next, 0);
1090
1091	MODULE = Coro::State PACKAGE = Coro	1171	MODULE = Coro::State PACKAGE = Coro
1092		1172
1093	# this is slightly dirty (should expose a c-level api)
1094
1095	BOOT:	1173	BOOT:
1096	{	1174	{
1097	int i;	1175	int i;
		1176
1098	HV *stash = gv_stashpv ("Coro", TRUE);	1177	coro_stash = gv_stashpv ("Coro", TRUE);
1099		1178
1100	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1101	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1102	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1103	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1104	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1105	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1106		1185
1107	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1108	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1109		1188
1110	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1118	coroapi.ready = api_ready;	1197	coroapi.ready = api_ready;
1119	coroapi.nready = &coro_nready;	1198	coroapi.nready = &coro_nready;
1120	coroapi.current = coro_current;	1199	coroapi.current = coro_current;
1121		1200
1122	GCoroAPI = &coroapi;	1201	GCoroAPI = &coroapi;
1123	sv_setiv(sv, (IV)&coroapi);	1202	sv_setiv (sv, (IV)&coroapi);
1124	SvREADONLY_on(sv);	1203	SvREADONLY_on (sv);
1125	}	1204	}
1126	}	1205	}
1127		1206
1128	#if !PERL_MICRO	1207	int
		1208	prio (Coro::State coro, int newprio = 0)
		1209	ALIAS:
		1210	nice = 1
		1211	CODE:
		1212	{
		1213	RETVAL = coro->prio;
		1214
		1215	if (items > 1)
		1216	{
		1217	if (ix)
		1218	newprio += coro->prio;
		1219
		1220	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1221	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1222
		1223	coro->prio = newprio;
		1224	}
		1225	}
1129		1226
1130	void	1227	void
1131	ready(self)	1228	ready (SV *self)
1132	SV * self
1133	PROTOTYPE: $	1229	PROTOTYPE: $
1134	CODE:	1230	CODE:
1135	api_ready (self);	1231	api_ready (self);
1136		1232
1137	#endif
1138
1139	int	1233	int
1140	nready(...)	1234	nready (...)
1141	PROTOTYPE:	1235	PROTOTYPE:
1142	CODE:	1236	CODE:
1143	RETVAL = coro_nready;	1237	RETVAL = coro_nready;
1144	OUTPUT:	1238	OUTPUT:
1145	RETVAL	1239	RETVAL
1146		1240
1147	void	1241	MODULE = Coro::State PACKAGE = Coro::AIO
1148	schedule(...)
1149	PROTOTYPE:
1150	CODE:
1151	api_schedule ();
1152		1242
1153	void
1154	cede(...)
1155	PROTOTYPE:
1156	CODE:
1157	api_cede ();
1158
1159	# and these are hacks
1160	SV *	1243	SV *
1161	_aio_get_state ()	1244	_get_state ()
1162	CODE:	1245	CODE:
1163	{	1246	{
1164	struct {	1247	struct {
1165	int errorno;	1248	int errorno;
1166	int laststype;	1249	int laststype;
…		…
1177	}	1260	}
1178	OUTPUT:	1261	OUTPUT:
1179	RETVAL	1262	RETVAL
1180		1263
1181	void	1264	void
1182	_aio_set_state (char *data_)	1265	_set_state (char *data_)
1183	PROTOTYPE: $	1266	PROTOTYPE: $
1184	CODE:	1267	CODE:
1185	{	1268	{
1186	struct {	1269	struct {
1187	int errorno;	1270	int errorno;

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