ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 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 PATCHLEVEL < 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
32	#include <signal.h>	40	#include <stdio.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)
64	#else	98	#else
65	# define LOCK 0	99	# define LOCK (void)0
66	# define UNLOCK 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;
…		…
128	I32 savestack_ix;	166	I32 savestack_ix;
129	I32 savestack_max;	167	I32 savestack_max;
130	OP **retstack;	168	OP **retstack;
131	I32 retstack_ix;	169	I32 retstack_ix;
132	I32 retstack_max;	170	I32 retstack_max;
		171	PMOP *curpm;
133	COP *curcop;	172	COP *curcop;
134	JMPENV *top_env;
135		173
136	/* data associated with this coroutine (initial args) */	174	/* coro process data */
137	AV *args;	175	int prio;
138	};	176	};
139		177
140	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
142		180
143	/* mostly copied from op.c:cv_clone2 */	181	static AV *
144	STATIC AV *	182	coro_clone_padlist (CV *cv)
145	clone_padlist (pTHX_ AV *protopadlist)
146	{	183	{
147	AV *av;	184	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV *newpadlist, *newpad_name, *newpad;	185	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		186
166	newpadlist = newAV ();	187	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
168	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)));
169	av_store (newpadlist, 1, (SV *) newpad);	198	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		199
240	return newpadlist;	200	return newpadlist;
241	}	201	}
242		202
243	STATIC void	203	static void
244	free_padlist (pTHX_ AV *padlist)	204	free_padlist (AV *padlist)
245	{	205	{
246	/* may be during global destruction */	206	/* may be during global destruction */
247	if (SvREFCNT (padlist))	207	if (SvREFCNT (padlist))
248	{	208	{
249	I32 i = AvFILLp (padlist);	209	I32 i = AvFILLp (padlist);
…		…
262		222
263	SvREFCNT_dec ((SV*)padlist);	223	SvREFCNT_dec ((SV*)padlist);
264	}	224	}
265	}	225	}
266		226
267	STATIC int	227	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	228	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	229	{
270	AV *padlist;	230	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	231	AV *av = (AV *)mg->mg_obj;
272		232
273	/* casting is fun. */	233	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	235	free_padlist (padlist);
276		236
277	SvREFCNT_dec (av);	237	SvREFCNT_dec (av);
		238
		239	return 0;
278	}	240	}
279		241
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	242	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		243
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		245
284	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
285	STATIC void	247	static void
286	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
287	{	249	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289		251
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
292	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
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	263	CvPADLIST (cv) = coro_clone_padlist (cv);
		264	#endif
		265	}
294	}	266	}
295		267
296	STATIC void	268	static void
297	put_padlist (pTHX_ CV *cv)	269	put_padlist (CV *cv)
298	{	270	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
300		272
301	if (!mg)	273	if (!mg)
302	{	274	{
…		…
310	}	282	}
311		283
312	#define SB do {	284	#define SB do {
313	#define SE } while (0)	285	#define SE } while (0)
314		286
315	#define LOAD(state) load_state(aTHX_ (state));	287	#define LOAD(state) load_state((state));
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	288	#define SAVE(state,flags) save_state((state),(flags));
317		289
318	#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
319		291
320	static void	292	static void
321	load_state(pTHX_ Coro__State c)	293	load_state(Coro__State c)
322	{	294	{
323	PL_dowarn = c->dowarn;	295	PL_dowarn = c->dowarn;
324	PL_in_eval = c->in_eval;	296	PL_in_eval = c->in_eval;
325		297
326	PL_curstackinfo = c->curstackinfo;	298	PL_curstackinfo = c->curstackinfo;
…		…
344	PL_scopestack_ix = c->scopestack_ix;	316	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;	317	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;	318	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;	319	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;	320	PL_savestack_max = c->savestack_max;
		321	#if !PERL_VERSION_ATLEAST (5,9,0)
349	PL_retstack = c->retstack;	322	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;	323	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;	324	PL_retstack_max = c->retstack_max;
		325	#endif
		326	PL_curpm = c->curpm;
352	PL_curcop = c->curcop;	327	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		328
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	331	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
358		332
…		…
365	{	339	{
366	AV *padlist = (AV *)POPs;	340	AV *padlist = (AV *)POPs;
367		341
368	if (padlist)	342	if (padlist)
369	{	343	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	344	put_padlist (cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	345	CvPADLIST(cv) = padlist;
372	}	346	}
373		347
374	++CvDEPTH(cv);	348	++CvDEPTH(cv);
375	}	349	}
…		…
377	PUTBACK;	351	PUTBACK;
378	}	352	}
379	}	353	}
380		354
381	static void	355	static void
382	save_state(pTHX_ Coro__State c, int flags)	356	save_state(Coro__State c, int flags)
383	{	357	{
384	{	358	{
385	dSP;	359	dSP;
386	I32 cxix = cxstack_ix;	360	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	361	PERL_CONTEXT *ccstk = cxstack;
…		…
415	}	389	}
416		390
417	PUSHs ((SV *)CvPADLIST(cv));	391	PUSHs ((SV *)CvPADLIST(cv));
418	PUSHs ((SV *)cv);	392	PUSHs ((SV *)cv);
419		393
420	get_padlist (aTHX_ cv); /* this is a monster */	394	get_padlist (cv);
421	}	395	}
422	}	396	}
423	#ifdef CXt_FORMAT	397	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)	398	else if (CxTYPE(cx) == CXt_FORMAT)
425	{	399	{
…		…
469	c->scopestack_ix = PL_scopestack_ix;	443	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;	444	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;	445	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;	446	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;	447	c->savestack_max = PL_savestack_max;
		448	#if !PERL_VERSION_ATLEAST (5,9,0)
474	c->retstack = PL_retstack;	449	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;	450	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;	451	c->retstack_max = PL_retstack_max;
		452	#endif
		453	c->curpm = PL_curpm;
477	c->curcop = PL_curcop;	454	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	455	}
480		456
481	/*	457	/*
482	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	460	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	461	* not usually need a lot of stackspace.
486	*/	462	*/
487	STATIC void	463	static void
488	coro_init_stacks (pTHX)	464	coro_init_stacks ()
489	{	465	{
490	LOCK;
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	467	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	468	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		470
…		…
517		491
518	New(54,PL_savestack,96,ANY);	492	New(54,PL_savestack,96,ANY);
519	PL_savestack_ix = 0;	493	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	494	PL_savestack_max = 96;
521		495
		496	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	497	New(54,PL_retstack,8,OP*);
523	PL_retstack_ix = 0;	498	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	499	PL_retstack_max = 8;
525		500	#endif
526	UNLOCK;
527	}	501	}
528		502
529	/*	503	/*
530	* destroy the stacks, the callchain etc...	504	* destroy the stacks, the callchain etc...
531	*/	505	*/
532	STATIC void	506	static void
533	destroy_stacks(pTHX)	507	coro_destroy_stacks ()
534	{	508	{
535	if (!IN_DESTRUCT)	509	if (!IN_DESTRUCT)
536	{	510	{
537	/* is this ugly, I ask? */	511	/* is this ugly, I ask? */
538	LEAVE_SCOPE (0);	512	LEAVE_SCOPE (0);
…		…
569		543
570	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	545	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	549	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	550	#endif
595	{
596	/*FIXME*//*D*//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}	551	}
606		552
607	static void	553	static void
608	deallocate_stack (Coro__State ctx)	554	setup_coro (struct coro *coro)
609	{
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void
633	setup_coro (void *arg)
634	{	555	{
635	/*	556	/*
636	* emulate part of the perl startup here.	557	* emulate part of the perl startup here.
637	*/	558	*/
638	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		559
643	coro_init_stacks (aTHX);	560	coro_init_stacks ();
		561
644	/*PL_curcop = 0;*/	562	PL_curcop = 0;
645	/*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
646	SvREFCNT_dec (GvAV (PL_defgv));	573	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	574	GvAV (PL_defgv) = coro->args; coro->args = 0;
648		575
649	SPAGAIN;
650
651	if (ctx->stack)
652	{
653	ctx->cursp = 0;
654
655	PUSHMARK(SP);
656	PUTBACK;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659	if (SvTRUE (ERRSV))
660	croak (NULL);
661	else
662	croak ("FATAL: CCTXT coroutine returned!");
663	}
664	else
665	{
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);	576	Zero (&myop, 1, LOGOP);
671	myop.op_next = Nullop;	577	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;	578	myop.op_flags = OPf_WANT_VOID;
673		579
		580	PL_op = (OP *)&myop;
		581
674	PUSHMARK(SP);	582	PUSHMARK (SP);
675	XPUSHs (sub_init);	583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;	584	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;	586	SPAGAIN;
686		587
687	ENTER; /* necessary e.g. for dounwind */	588	ENTER; /* necessary e.g. for dounwind */
688	}	589	}
689	}	590	}
690		591
691	static void	592	static void
692	continue_coro (void *arg)	593	free_coro_mortal ()
693	{	594	{
694	/*
695	* this is a _very_ stripped down perl interpreter ;)
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700
701	PL_top_env = &ctx->start_env;
702
703	ctx->cursp = 0;
704	PL_op = PL_op->op_next;
705	CALLRUNOPS(aTHX);
706
707	abort ();
708	}
709
710	STATIC void
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
712	{
713	dSTACKLEVEL;
714
715	if (prev != next)
716	{
717	if (next->mainstack)
718	{
719	LOCK;
720	SAVE (prev, flags);
721	LOAD (next);
722	UNLOCK;
723
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}
757	else if (next->tmps_ix == -2)
758	croak ("tried to transfer to running coroutine");
759	else
760	{
761	LOCK;
762	SAVE (prev, -1); /* first get rid of the old state */
763	UNLOCK;
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}
800	}
801
802	LOCK;
803	if (coro_mortal)	595	if (coro_mortal)
804	{	596	{
805	SvREFCNT_dec (coro_mortal);	597	SvREFCNT_dec (coro_mortal);
806	coro_mortal = 0;	598	coro_mortal = 0;
807	}	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() */
808	UNLOCK;	625	UNLOCK;
809	}
810		626
811	#define SV_CORO(sv,func) \	627	/*
812	do { \	628	* this is a _very_ stripped down perl interpreter ;)
813	if (SvROK (sv)) \	629	*/
814	sv = SvRV (sv); \	630	PL_top_env = &PL_start_env;
815	\	631	/* inject call to cctx_init */
816	if (SvTYPE (sv) == SVt_PVHV) \	632	prepare_cctx ((coro_cctx *)arg);
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		633
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	634	/* somebody will hit me for both perl_run and PL_restartop */
		635	perl_run (PL_curinterp);
833		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
834	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
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	897	api_transfer (SV *prev, SV *next, int flags)
836	{	898	{
837	SV_CORO (prev, "Coro::transfer");	899	dTHX;
838	SV_CORO (next, "Coro::transfer");	900	struct transfer_args ta;
839		901
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	902	prepare_transfer (&ta, prev, next, flags);
		903	TRANSFER (ta);
841	}	904	}
842		905
843	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
844		907
845	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
849	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
850	#define PRIO_MIN -4	913	#define PRIO_MIN -4
851		914
852	/* for Coro.pm */	915	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;	916	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;	918	static int coro_nready;
856		919
857	static void	920	static void
858	coro_enq (pTHX_ SV *sv)	921	coro_enq (SV *sv)
859	{	922	{
		923	int prio;
		924
860	if (SvTYPE (sv) == SVt_PVHV)	925	if (SvTYPE (sv) != SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);
870	coro_nready++;
871
872	return;
873	}
874
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");
		927
		928	prio = SvSTATE (sv)->prio;
		929
		930	av_push (coro_ready [prio - PRIO_MIN], sv);
		931	coro_nready++;
876	}	932	}
877		933
878	static SV *	934	static SV *
879	coro_deq (pTHX_ int min_prio)	935	coro_deq (int min_prio)
880	{	936	{
881	int prio = PRIO_MAX - PRIO_MIN;	937	int prio = PRIO_MAX - PRIO_MIN;
882		938
883	min_prio -= PRIO_MIN;	939	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	940	if (min_prio < 0)
885	min_prio = 0;	941	min_prio = 0;
886		942
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	944	if (AvFILLp (coro_ready [prio]) >= 0)
889	{	945	{
890	coro_nready--;	946	coro_nready--;
891	return av_shift (coro_ready[prio]);	947	return av_shift (coro_ready [prio]);
892	}	948	}
893		949
894	return 0;	950	return 0;
895	}	951	}
896		952
…		…
901		957
902	if (SvROK (coro))	958	if (SvROK (coro))
903	coro = SvRV (coro);	959	coro = SvRV (coro);
904		960
905	LOCK;	961	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	962	coro_enq (SvREFCNT_inc (coro));
907	UNLOCK;	963	UNLOCK;
908	}	964	}
909		965
910	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
911	api_schedule (void)	1022	api_schedule (void)
912	{	1023	{
913	dTHX;	1024	dTHX;
		1025	struct transfer_args ta;
914		1026
915	SV *prev, *next;	1027	prepare_schedule (&ta);
916		1028	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1029	}
938		1030
939	static void	1031	static void
940	api_cede (void)	1032	api_cede (void)
941	{	1033	{
942	dTHX;	1034	dTHX;
		1035	struct transfer_args ta;
943		1036
944	LOCK;	1037	prepare_cede (&ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1038	TRANSFER (ta);
946	UNLOCK;
947
948	api_schedule ();
949	}	1039	}
950		1040
951	MODULE = Coro::State PACKAGE = Coro::State	1041	MODULE = Coro::State PACKAGE = Coro::State
952		1042
953	PROTOTYPES: ENABLE	1043	PROTOTYPES: DISABLE
954		1044
955	BOOT:	1045	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1046	{
957	#ifdef USE_ITHREADS	1047	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1048	MUTEX_INIT (&coro_mutex);
959	#endif	1049	#endif
		1050	BOOT_PAGESIZE;
960		1051
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1053
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
969		1057
970	main_mainstack = PL_mainstack;	1058	main_mainstack = PL_mainstack;
971		1059
972	coroapi.ver = CORO_API_VERSION;	1060	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1061	coroapi.transfer = api_transfer;
974	}
975		1062
976	Coro::State	1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1064	}
978	SV * args	1065
979	PROTOTYPE: $	1066	SV *
		1067	new (char *klass, ...)
980	CODE:	1068	CODE:
981	Coro__State coro;	1069	{
		1070	struct coro *coro;
		1071	HV *hv;
		1072	int i;
982		1073
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1074	Newz (0, coro, 1, struct coro);
		1075	coro->args = newAV ();
987		1076
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1077	hv = newHV ();
989	/*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;
990	/*coro->stack = 0;*/	1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991		1080
992	/* same as JMPENV_BOOTSTRAP */	1081	for (i = 1; i < items; i++)
993	/* we might be able to recycle start_env, but safe is safe */	1082	av_push (coro->args, newSVsv (ST (i)));
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1083	}
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997
998	RETVAL = coro;
999	OUTPUT:	1084	OUTPUT:
1000	RETVAL	1085	RETVAL
1001		1086
1002	void	1087	void
1003	transfer(prev, next, flags)	1088	_set_stacklevel (...)
1004	SV *prev	1089	ALIAS:
1005	SV *next	1090	Coro::State::transfer = 1
1006	int flags	1091	Coro::schedule = 2
1007	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
1008	CODE:	1094	CODE:
1009	PUTBACK;	1095	{
1010	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1097
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
1013	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	}
1014		1151
1015	void	1152	void
1016	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
1017	Coro::State coro	1154	CODE:
1018	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
1019		1157
1020	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1021	{
1022	struct coro temp;
1023		1159
1024	PUTBACK;	1160	++coro_src->refcnt;
1025	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;
1026	LOAD (aTHX_ coro);	1162	}
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040		1163
1041	void	1164	void
1042	_exit(code)	1165	_exit (code)
1043	int code	1166	int code
1044	PROTOTYPE: $	1167	PROTOTYPE: $
1045	CODE:	1168	CODE:
1046	_exit (code);	1169	_exit (code);
1047		1170
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1171	int
		1172	cctx_count ()
		1173	CODE:
		1174	RETVAL = cctx_count;
		1175	OUTPUT:
		1176	RETVAL
1049		1177
1050	# this is slightly dirty (should expose a c-level api)	1178	int
1051		1179	cctx_idle ()
1052	void	1180	CODE:
1053	yield(...)	1181	RETVAL = cctx_idle;
1054	PROTOTYPE: @	1182	OUTPUT:
1055	CODE:	1183	RETVAL
1056	static SV *returnstk;
1057	SV *sv;
1058	AV *defav = GvAV (PL_defgv);
1059	struct coro *prev, *next;
1060
1061	if (!returnstk)
1062	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064	/* set up @_ -- ugly */
1065	av_clear (defav);
1066	av_fill (defav, items - 1);
1067	while (items--)
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071	sv = av_pop ((AV *)SvRV (returnstk));
1072	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074	SvREFCNT_dec (sv);
1075
1076	transfer (aTHX_ prev, next, 0);
1077		1184
1078	MODULE = Coro::State PACKAGE = Coro	1185	MODULE = Coro::State PACKAGE = Coro
1079		1186
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1187	BOOT:
1083	{	1188	{
1084	int i;	1189	int i;
		1190
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1191	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1192
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093		1199
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1096		1202
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1105	coroapi.ready = api_ready;	1211	coroapi.ready = api_ready;
1106	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1108		1214
1109	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1217	SvREADONLY_on (sv);
1112	}	1218	}
1113	}	1219	}
1114		1220
1115	#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	}
1116		1240
1117	void	1241	void
1118	ready(self)	1242	ready (SV *self)
1119	SV * self
1120	PROTOTYPE: $	1243	PROTOTYPE: $
1121	CODE:	1244	CODE:
1122	api_ready (self);	1245	api_ready (self);
1123		1246
1124	#endif
1125
1126	int	1247	int
1127	nready(...)	1248	nready (...)
1128	PROTOTYPE:	1249	PROTOTYPE:
1129	CODE:	1250	CODE:
1130	RETVAL = coro_nready;	1251	RETVAL = coro_nready;
1131	OUTPUT:	1252	OUTPUT:
1132	RETVAL	1253	RETVAL
1133		1254
		1255	MODULE = Coro::State PACKAGE = Coro::AIO
		1256
		1257	SV *
		1258	_get_state ()
		1259	CODE:
		1260	{
		1261	struct {
		1262	int errorno;
		1263	int laststype;
		1264	int laststatval;
		1265	Stat_t statcache;
		1266	} data;
		1267
		1268	data.errorno = errno;
		1269	data.laststype = PL_laststype;
		1270	data.laststatval = PL_laststatval;
		1271	data.statcache = PL_statcache;
		1272
		1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1274	}
		1275	OUTPUT:
		1276	RETVAL
		1277
1134	void	1278	void
1135	schedule(...)	1279	_set_state (char *data_)
1136	PROTOTYPE:	1280	PROTOTYPE: $
1137	CODE:	1281	CODE:
1138	api_schedule ();	1282	{
		1283	struct {
		1284	int errorno;
		1285	int laststype;
		1286	int laststatval;
		1287	Stat_t statcache;
		1288	} *data = (void *)data_;
1139		1289
1140	void	1290	errno = data->errorno;
1141	cede(...)	1291	PL_laststype = data->laststype;
1142	PROTOTYPE:	1292	PL_laststatval = data->laststatval;
1143	CODE:	1293	PL_statcache = data->statcache;
1144	api_cede ();	1294	}
1145

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines