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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.65 by root, Mon Dec 5 23:50:48 2005 UTC vs.
Revision 1.103 by root, Mon Nov 27 01:33:30 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	#define PERL_VERSION_ATLEAST(a,b,c) \
		10	(PERL_REVISION > (a) \
		11	|| (PERL_REVISION == (a) \
		12	&& (PERL_VERSION > (b) \
		13	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		14
		15	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	16	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	17	# define PL_ppaddr ppaddr
14	# endif	18	# endif
15	# ifndef call_sv	19	# ifndef call_sv
16	# define call_sv perl_call_sv	20	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	31	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	32	# define IS_PADCONST(v) 0
29	# endif	33	# endif
30	#endif	34	#endif
31		35
32	#include <signal.h>	36	#include <stdio.h>
		37	#include <errno.h>
		38
		39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		40	# undef STACKGUARD
		41	#endif
		42
		43	#ifndef STACKGUARD
		44	# define STACKGUARD 0
		45	#endif
33		46
34	#ifdef HAVE_MMAP	47	#ifdef HAVE_MMAP
35	# include <unistd.h>	48	# include <unistd.h>
36	# include <sys/mman.h>	49	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	50	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	52	# define MAP_ANONYMOUS MAP_ANON
40	# else	53	# else
41	# undef HAVE_MMAP	54	# undef HAVE_MMAP
42	# endif	55	# endif
43	# endif	56	# endif
		57	# include <limits.h>
		58	# ifndef PAGESIZE
		59	# define PAGESIZE pagesize
		60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		61	static long pagesize;
		62	# else
		63	# define BOOT_PAGESIZE
44	#endif	64	# endif
45		65	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		66
49	/* The next macro should declare a variable stacklevel that contains and approximation	67	/* 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	68	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	69	* and should be unique. */
		70	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	71	#define STACKLEVEL ((void *)&stacklevel)
53		72
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	73	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		74
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	75	#if __GNUC__ >= 3
		76	# define attribute(x) __attribute__(x)
		77	#else
		78	# define attribute(x)
		79	#endif
		80
		81	#define NOINLINE attribute ((noinline))
57		82
58	#include "CoroAPI.h"	83	#include "CoroAPI.h"
		84
		85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		86
60	#ifdef USE_ITHREADS	87	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	88	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	91	#else
65	# define LOCK 0	92	# define LOCK (void)0
66	# define UNLOCK 0	93	# define UNLOCK (void)0
67	#endif	94	#endif
68		95
69	static struct CoroAPI coroapi;	96	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	97	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	98	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 */	99	static SV *coro_mortal; /* will be freed after next transfer */
75		100
76	/* this is actually not only the c stack but also c registers etc... */	101	/* this is a structure representing a c-level coroutine */
77	typedef struct {	102	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	103	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		104
82	coro_context cctx;	105	/* the stack */
83
84	void *sptr;	106	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	107	long ssize; /* positive == mmap, otherwise malloc */
		108
		109	/* cpu state */
		110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		111	JMPENV *top_env;
		112	coro_context cctx;
86	} coro_stack;	113	} coro_stack;
87		114
		115	/* this is a structure representing a perl-level coroutine */
88	struct coro {	116	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	117	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	118	coro_stack *stack;
94	void *cursp;	119
		120	/* data associated with this coroutine (initial args) */
		121	AV *args;
95	int gencnt;	122	int refcnt;
96		123
97	/* optionally saved, might be zero */	124	/* optionally saved, might be zero */
98	AV *defav;	125	AV *defav;
99	SV *defsv;	126	SV *defsv;
100	SV *errsv;	127	SV *errsv;
…		…
128	I32 savestack_ix;	155	I32 savestack_ix;
129	I32 savestack_max;	156	I32 savestack_max;
130	OP **retstack;	157	OP **retstack;
131	I32 retstack_ix;	158	I32 retstack_ix;
132	I32 retstack_max;	159	I32 retstack_max;
		160	PMOP *curpm;
133	COP *curcop;	161	COP *curcop;
134	JMPENV *top_env;
135		162
136	/* data associated with this coroutine (initial args) */	163	/* coro process data */
137	AV *args;	164	int prio;
138	};	165	};
139		166
140	typedef struct coro *Coro__State;	167	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	168	typedef struct coro *Coro__State_or_hashref;
142		169
143	/* mostly copied from op.c:cv_clone2 */	170	static AV *
144	STATIC AV *	171	coro_clone_padlist (CV *cv)
145	clone_padlist (pTHX_ AV *protopadlist)
146	{	172	{
147	AV *av;	173	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;	174	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		175
166	newpadlist = newAV ();	176	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	177	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	178	#if PERL_VERSION_ATLEAST (5,9,0)
		179	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		180	#else
		181	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		182	#endif
		183	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		184	--AvFILLp (padlist);
		185
		186	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	187	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		188
240	return newpadlist;	189	return newpadlist;
241	}	190	}
242		191
243	STATIC void	192	static void
244	free_padlist (pTHX_ AV *padlist)	193	free_padlist (AV *padlist)
245	{	194	{
246	/* may be during global destruction */	195	/* may be during global destruction */
247	if (SvREFCNT (padlist))	196	if (SvREFCNT (padlist))
248	{	197	{
249	I32 i = AvFILLp (padlist);	198	I32 i = AvFILLp (padlist);
…		…
262		211
263	SvREFCNT_dec ((SV*)padlist);	212	SvREFCNT_dec ((SV*)padlist);
264	}	213	}
265	}	214	}
266		215
267	STATIC int	216	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	217	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	218	{
270	AV *padlist;	219	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	220	AV *av = (AV *)mg->mg_obj;
272		221
273	/* casting is fun. */	222	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	224	free_padlist (padlist);
276		225
277	SvREFCNT_dec (av);	226	SvREFCNT_dec (av);
		227
		228	return 0;
278	}	229	}
279		230
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	231	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		232
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		234
284	/* the next two functions merely cache the padlists */	235	/* the next two functions merely cache the padlists */
285	STATIC void	236	static void
286	get_padlist (pTHX_ CV *cv)	237	get_padlist (CV *cv)
287	{	238	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289		240
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
292	else	243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
294	}	255	}
295		256
296	STATIC void	257	static void
297	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
298	{	259	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
300		261
301	if (!mg)	262	if (!mg)
302	{	263	{
…		…
310	}	271	}
311		272
312	#define SB do {	273	#define SB do {
313	#define SE } while (0)	274	#define SE } while (0)
314		275
315	#define LOAD(state) load_state(aTHX_ (state));	276	#define LOAD(state) load_state((state));
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	277	#define SAVE(state,flags) save_state((state),(flags));
317		278
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
319		280
320	static void	281	static void
321	load_state(pTHX_ Coro__State c)	282	load_state(Coro__State c)
322	{	283	{
323	PL_dowarn = c->dowarn;	284	PL_dowarn = c->dowarn;
324	PL_in_eval = c->in_eval;	285	PL_in_eval = c->in_eval;
325		286
326	PL_curstackinfo = c->curstackinfo;	287	PL_curstackinfo = c->curstackinfo;
…		…
344	PL_scopestack_ix = c->scopestack_ix;	305	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;	306	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;	307	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;	308	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
		310	#if !PERL_VERSION_ATLEAST (5,9,0)
349	PL_retstack = c->retstack;	311	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;	312	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;	313	PL_retstack_max = c->retstack_max;
		314	#endif
		315	PL_curpm = c->curpm;
352	PL_curcop = c->curcop;	316	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		317
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
358		321
…		…
365	{	328	{
366	AV *padlist = (AV *)POPs;	329	AV *padlist = (AV *)POPs;
367		330
368	if (padlist)	331	if (padlist)
369	{	332	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	333	put_padlist (cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	334	CvPADLIST(cv) = padlist;
372	}	335	}
373		336
374	++CvDEPTH(cv);	337	++CvDEPTH(cv);
375	}	338	}
…		…
377	PUTBACK;	340	PUTBACK;
378	}	341	}
379	}	342	}
380		343
381	static void	344	static void
382	save_state(pTHX_ Coro__State c, int flags)	345	save_state(Coro__State c, int flags)
383	{	346	{
384	{	347	{
385	dSP;	348	dSP;
386	I32 cxix = cxstack_ix;	349	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	350	PERL_CONTEXT *ccstk = cxstack;
…		…
415	}	378	}
416		379
417	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST(cv));
418	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
419		382
420	get_padlist (aTHX_ cv); /* this is a monster */	383	get_padlist (cv);
421	}	384	}
422	}	385	}
423	#ifdef CXt_FORMAT	386	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)	387	else if (CxTYPE(cx) == CXt_FORMAT)
425	{	388	{
…		…
469	c->scopestack_ix = PL_scopestack_ix;	432	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;	433	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;	434	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;	435	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
		437	#if !PERL_VERSION_ATLEAST (5,9,0)
474	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
		441	#endif
		442	c->curpm = PL_curpm;
477	c->curcop = PL_curcop;	443	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	444	}
480		445
481	/*	446	/*
482	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
486	*/	451	*/
487	STATIC void	452	static void
488	coro_init_stacks (pTHX)	453	coro_init_stacks ()
489	{	454	{
490	LOCK;
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	456	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	457	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		459
…		…
517		480
518	New(54,PL_savestack,96,ANY);	481	New(54,PL_savestack,96,ANY);
519	PL_savestack_ix = 0;	482	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	483	PL_savestack_max = 96;
521		484
		485	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	486	New(54,PL_retstack,8,OP*);
523	PL_retstack_ix = 0;	487	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	488	PL_retstack_max = 8;
525		489	#endif
526	UNLOCK;
527	}	490	}
528		491
529	/*	492	/*
530	* destroy the stacks, the callchain etc...	493	* destroy the stacks, the callchain etc...
531	*/	494	*/
532	STATIC void	495	static void
533	destroy_stacks(pTHX)	496	coro_destroy_stacks()
534	{	497	{
535	if (!IN_DESTRUCT)	498	if (!IN_DESTRUCT)
536	{	499	{
537	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
538	LEAVE_SCOPE (0);	501	LEAVE_SCOPE (0);
…		…
569		532
570	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	534	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	536	Safefree (PL_savestack);
		537	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	538	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	539	#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	}	540	}
606		541
607	static void	542	static void
608	deallocate_stack (Coro__State ctx)	543	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	{	544	{
635	/*	545	/*
636	* emulate part of the perl startup here.	546	* emulate part of the perl startup here.
637	*/	547	*/
638	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		548
643	coro_init_stacks (aTHX);	549	coro_init_stacks ();
		550
644	/*PL_curcop = 0;*/	551	PL_curcop = 0;
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */	552	PL_in_eval = 0;
		553	PL_curpm = 0;
		554
		555	{
		556	dSP;
		557	LOGOP myop;
		558
		559	/* I have no idea why this is needed, but it is */
		560	PUSHMARK (SP);
		561
646	SvREFCNT_dec (GvAV (PL_defgv));	562	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	563	GvAV (PL_defgv) = coro->args; coro->args = 0;
648		564
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);	565	Zero (&myop, 1, LOGOP);
671	myop.op_next = Nullop;	566	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;	567	myop.op_flags = OPf_WANT_VOID;
673		568
		569	PL_op = (OP *)&myop;
		570
674	PUSHMARK(SP);	571	PUSHMARK (SP);
675	XPUSHs (sub_init);	572	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;	573	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;	575	SPAGAIN;
686		576
687	ENTER; /* necessary e.g. for dounwind */	577	ENTER; /* necessary e.g. for dounwind */
688	}	578	}
689	}	579	}
690		580
691	static void	581	static void
692	continue_coro (void *arg)	582	free_coro_mortal ()
693	{	583	{
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)	584	if (coro_mortal)
804	{	585	{
805	SvREFCNT_dec (coro_mortal);	586	SvREFCNT_dec (coro_mortal);
806	coro_mortal = 0;	587	coro_mortal = 0;
807	}	588	}
		589	}
		590
		591	static void NOINLINE
		592	prepare_cctx (coro_stack *cctx)
		593	{
		594	dSP;
		595	LOGOP myop;
		596
		597	Zero (&myop, 1, LOGOP);
		598	myop.op_next = PL_op;
		599	myop.op_flags = OPf_WANT_VOID;
		600
		601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
		602
		603	PUSHMARK (SP);
		604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		605	PUTBACK;
		606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		607	SPAGAIN;
		608	}
		609
		610	static void
		611	coro_run (void *arg)
		612	{
		613	/* coro_run is the alternative epilogue of transfer() */
808	UNLOCK;	614	UNLOCK;
809	}
810		615
811	#define SV_CORO(sv,func) \	616	/*
812	do { \	617	* this is a _very_ stripped down perl interpreter ;)
813	if (SvROK (sv)) \	618	*/
814	sv = SvRV (sv); \	619	PL_top_env = &PL_start_env;
815	\	620	/* inject call to cctx_init */
816	if (SvTYPE (sv) == SVt_PVHV) \	621	prepare_cctx ((coro_stack *)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		622
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	623	/* somebody will hit me for both perl_run and PL_restartop */
		624	perl_run (PL_curinterp);
833		625
		626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		627	abort ();
		628	}
		629
		630	static coro_stack *
		631	stack_new ()
		632	{
		633	coro_stack *stack;
		634
		635	New (0, stack, 1, coro_stack);
		636
		637	#if HAVE_MMAP
		638
		639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		640	/* mmap suppsedly does allocate-on-write for us */
		641	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		642
		643	if (stack->sptr == (void *)-1)
		644	{
		645	perror ("FATAL: unable to mmap stack for coroutine");
		646	_exit (EXIT_FAILURE);
		647	}
		648
		649	# if STACKGUARD
		650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		651	# endif
		652
		653	#else
		654
		655	stack->ssize = STACKSIZE * (long)sizeof (long);
		656	New (0, stack->sptr, STACKSIZE, long);
		657
		658	if (!stack->sptr)
		659	{
		660	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		661	_exit (EXIT_FAILURE);
		662	}
		663
		664	#endif
		665
		666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		667
		668	return stack;
		669	}
		670
		671	static void
		672	stack_free (coro_stack *stack)
		673	{
		674	if (!stack)
		675	return;
		676
		677	#if HAVE_MMAP
		678	munmap (stack->sptr, stack->ssize);
		679	#else
		680	Safefree (stack->sptr);
		681	#endif
		682
		683	Safefree (stack);
		684	}
		685
		686	static coro_stack *stack_first;
		687	static int cctx_count, cctx_idle;
		688
		689	static coro_stack *
		690	stack_get ()
		691	{
		692	coro_stack *stack;
		693
		694	if (stack_first)
		695	{
		696	--cctx_idle;
		697	stack = stack_first;
		698	stack_first = stack->next;
		699	}
		700	else
		701	{
		702	++cctx_count;
		703	stack = stack_new ();
		704	PL_op = PL_op->op_next;
		705	}
		706
		707	return stack;
		708	}
		709
		710	static void
		711	stack_put (coro_stack *stack)
		712	{
		713	++cctx_idle;
		714	stack->next = stack_first;
		715	stack_first = stack;
		716	}
		717
		718	/* never call directly, always through the coro_state_transfer global variable */
		719	static void NOINLINE
		720	transfer (struct coro *prev, struct coro *next, int flags)
		721	{
		722	dSTACKLEVEL;
		723
		724	/* sometimes transfer is only called to set idle_sp */
		725	if (flags == TRANSFER_SET_STACKLEVEL)
		726	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		727	else if (prev != next)
		728	{
		729	coro_stack *prev__stack;
		730
		731	LOCK;
		732
		733	if (next->mainstack)
		734	{
		735	/* coroutine already started */
		736	SAVE (prev, flags);
		737	LOAD (next);
		738	}
		739	else
		740	{
		741	/* need to start coroutine */
		742	/* first get rid of the old state */
		743	SAVE (prev, -1);
		744	/* setup coroutine call */
		745	setup_coro (next);
		746	/* need a stack */
		747	next->stack = 0;
		748	}
		749
		750	if (!prev->stack)
		751	/* create a new empty context */
		752	Newz (0, prev->stack, 1, coro_stack);
		753
		754	prev__stack = prev->stack;
		755
		756	/* possibly "free" the stack */
		757	if (prev__stack->idle_sp == STACKLEVEL)
		758	{
		759	stack_put (prev__stack);
		760	prev->stack = 0;
		761	}
		762
		763	if (!next->stack)
		764	next->stack = stack_get ();
		765
		766	if (prev__stack != next->stack)
		767	{
		768	prev__stack->top_env = PL_top_env;
		769	PL_top_env = next->stack->top_env;
		770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		771	}
		772
		773	free_coro_mortal ();
		774
		775	UNLOCK;
		776	}
		777	}
		778
		779	struct transfer_args
		780	{
		781	struct coro *prev, *next;
		782	int flags;
		783	};
		784
		785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		786
		787	static void
		788	coro_state_destroy (struct coro *coro)
		789	{
		790	if (coro->refcnt--)
		791	return;
		792
		793	if (coro->mainstack && coro->mainstack != main_mainstack)
		794	{
		795	struct coro temp;
		796
		797	SAVE ((&temp), TRANSFER_SAVE_ALL);
		798	LOAD (coro);
		799
		800	coro_destroy_stacks ();
		801
		802	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		803
		804	coro->mainstack = 0;
		805	}
		806
		807	stack_free (coro->stack);
		808	SvREFCNT_dec (coro->args);
		809	Safefree (coro);
		810	}
		811
834	static void	812	static int
		813	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		814	{
		815	struct coro *coro = (struct coro *)mg->mg_ptr;
		816	mg->mg_ptr = 0;
		817
		818	coro_state_destroy (coro);
		819
		820	return 0;
		821	}
		822
		823	static int
		824	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		825	{
		826	struct coro *coro = (struct coro *)mg->mg_ptr;
		827
		828	++coro->refcnt;
		829
		830	return 0;
		831	}
		832
		833	static MGVTBL coro_state_vtbl = {
		834	0, 0, 0, 0,
		835	coro_state_clear,
		836	0,
		837	#ifdef MGf_DUP
		838	coro_state_dup,
		839	#else
		840	# define MGf_DUP 0
		841	#endif
		842	};
		843
		844	static struct coro *
		845	SvSTATE (SV *coro)
		846	{
		847	HV *stash;
		848	MAGIC *mg;
		849
		850	if (SvROK (coro))
		851	coro = SvRV (coro);
		852
		853	stash = SvSTASH (coro);
		854	if (stash != coro_stash && stash != coro_state_stash)
		855	{
		856	/* very slow, but rare, check */
		857	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		858	croak ("Coro::State object required");
		859	}
		860
		861	mg = SvMAGIC (coro);
		862	assert (mg->mg_type == PERL_MAGIC_ext);
		863	return (struct coro *)mg->mg_ptr;
		864	}
		865
		866	static void
		867	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		868	{
		869	ta->prev = SvSTATE (prev);
		870	ta->next = SvSTATE (next);
		871	ta->flags = flags;
		872	}
		873
		874	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	875	api_transfer (SV *prev, SV *next, int flags)
836	{	876	{
837	SV_CORO (prev, "Coro::transfer");	877	dTHX;
838	SV_CORO (next, "Coro::transfer");	878	struct transfer_args ta;
839		879
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	880	prepare_transfer (&ta, prev, next, flags);
		881	TRANSFER (ta);
841	}	882	}
842		883
843	/** Coro ********************************************************************/	884	/** Coro ********************************************************************/
844		885
845	#define PRIO_MAX 3	886	#define PRIO_MAX 3
…		…
849	#define PRIO_IDLE -3	890	#define PRIO_IDLE -3
850	#define PRIO_MIN -4	891	#define PRIO_MIN -4
851		892
852	/* for Coro.pm */	893	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;	894	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;	896	static int coro_nready;
856		897
857	static void	898	static void
858	coro_enq (pTHX_ SV *sv)	899	coro_enq (SV *sv)
859	{	900	{
		901	int prio;
		902
860	if (SvTYPE (sv) == SVt_PVHV)	903	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");	904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		905
		906	prio = SvSTATE (sv)->prio;
		907
		908	av_push (coro_ready [prio - PRIO_MIN], sv);
		909	coro_nready++;
876	}	910	}
877		911
878	static SV *	912	static SV *
879	coro_deq (pTHX_ int min_prio)	913	coro_deq (int min_prio)
880	{	914	{
881	int prio = PRIO_MAX - PRIO_MIN;	915	int prio = PRIO_MAX - PRIO_MIN;
882		916
883	min_prio -= PRIO_MIN;	917	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	918	if (min_prio < 0)
885	min_prio = 0;	919	min_prio = 0;
886		920
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	922	if (AvFILLp (coro_ready [prio]) >= 0)
889	{	923	{
890	coro_nready--;	924	coro_nready--;
891	return av_shift (coro_ready[prio]);	925	return av_shift (coro_ready [prio]);
892	}	926	}
893		927
894	return 0;	928	return 0;
895	}	929	}
896		930
…		…
901		935
902	if (SvROK (coro))	936	if (SvROK (coro))
903	coro = SvRV (coro);	937	coro = SvRV (coro);
904		938
905	LOCK;	939	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	940	coro_enq (SvREFCNT_inc (coro));
907	UNLOCK;	941	UNLOCK;
908	}	942	}
909		943
910	static void	944	static void
		945	prepare_schedule (struct transfer_args *ta)
		946	{
		947	SV *current, *prev, *next;
		948
		949	current = GvSV (coro_current);
		950
		951	for (;;)
		952	{
		953	LOCK;
		954	next = coro_deq (PRIO_MIN);
		955	UNLOCK;
		956
		957	if (next)
		958	break;
		959
		960	{
		961	dSP;
		962
		963	ENTER;
		964	SAVETMPS;
		965
		966	PUSHMARK (SP);
		967	PUTBACK;
		968	call_sv (GvSV (coro_idle), G_DISCARD);
		969
		970	FREETMPS;
		971	LEAVE;
		972	}
		973	}
		974
		975	prev = SvRV (current);
		976	SvRV (current) = next;
		977
		978	/* free this only after the transfer */
		979	LOCK;
		980	free_coro_mortal ();
		981	UNLOCK;
		982	coro_mortal = prev;
		983
		984	ta->prev = SvSTATE (prev);
		985	ta->next = SvSTATE (next);
		986	ta->flags = TRANSFER_SAVE_ALL;
		987	}
		988
		989	static void
		990	prepare_cede (struct transfer_args *ta)
		991	{
		992	LOCK;
		993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		994	UNLOCK;
		995
		996	prepare_schedule (ta);
		997	}
		998
		999	static void
911	api_schedule (void)	1000	api_schedule (void)
912	{	1001	{
913	dTHX;	1002	dTHX;
		1003	struct transfer_args ta;
914		1004
915	SV *prev, *next;	1005	prepare_schedule (&ta);
916		1006	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	}	1007	}
938		1008
939	static void	1009	static void
940	api_cede (void)	1010	api_cede (void)
941	{	1011	{
942	dTHX;	1012	dTHX;
		1013	struct transfer_args ta;
943		1014
944	LOCK;	1015	prepare_cede (&ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1016	TRANSFER (ta);
946	UNLOCK;
947
948	api_schedule ();
949	}	1017	}
950		1018
951	MODULE = Coro::State PACKAGE = Coro::State	1019	MODULE = Coro::State PACKAGE = Coro::State
952		1020
953	PROTOTYPES: ENABLE	1021	PROTOTYPES: DISABLE
954		1022
955	BOOT:	1023	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1024	{
957	#ifdef USE_ITHREADS	1025	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1026	MUTEX_INIT (&coro_mutex);
959	#endif	1027	#endif
		1028	BOOT_PAGESIZE;
960		1029
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);	1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1031
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
969		1035
970	main_mainstack = PL_mainstack;	1036	main_mainstack = PL_mainstack;
971		1037
972	coroapi.ver = CORO_API_VERSION;	1038	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1039	coroapi.transfer = api_transfer;
974	}
975		1040
976	Coro::State	1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1042	}
978	SV * args	1043
979	PROTOTYPE: $	1044	SV *
		1045	new (char *klass, ...)
980	CODE:	1046	CODE:
981	Coro__State coro;	1047	{
		1048	struct coro *coro;
		1049	HV *hv;
		1050	int i;
982		1051
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);	1052	Newz (0, coro, 1, struct coro);
		1053	coro->args = newAV ();
987		1054
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1055	hv = newHV ();
		1056	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1058
		1059	for (i = 1; i < items; i++)
		1060	av_push (coro->args, newSVsv (ST (i)));
		1061
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
990	/*coro->stack = 0;*/	1063	/*coro->stack = 0;*/
991		1064	}
992	/* same as JMPENV_BOOTSTRAP */
993	/* we might be able to recycle start_env, but safe is safe */
994	/*Zero(&coro->start_env, 1, JMPENV);*/
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997
998	RETVAL = coro;
999	OUTPUT:	1065	OUTPUT:
1000	RETVAL	1066	RETVAL
1001		1067
1002	void	1068	void
1003	transfer(prev, next, flags)	1069	_set_stacklevel (...)
1004	SV *prev	1070	ALIAS:
1005	SV *next	1071	Coro::State::transfer = 1
1006	int flags	1072	Coro::schedule = 2
1007	PROTOTYPE: @	1073	Coro::cede = 3
		1074	Coro::Cont::yield = 4
1008	CODE:	1075	CODE:
1009	PUTBACK;	1076	{
1010	SV_CORO (next, "Coro::transfer");	1077	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1078
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1079	switch (ix)
1013	SPAGAIN;	1080	{
		1081	case 0:
		1082	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1083	ta.next = 0;
		1084	ta.flags = TRANSFER_SET_STACKLEVEL;
		1085	break;
		1086
		1087	case 1:
		1088	if (items != 3)
		1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1090
		1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1092	break;
		1093
		1094	case 2:
		1095	prepare_schedule (&ta);
		1096	break;
		1097
		1098	case 3:
		1099	prepare_cede (&ta);
		1100	break;
		1101
		1102	case 4:
		1103	{
		1104	SV *yieldstack;
		1105	SV *sv;
		1106	AV *defav = GvAV (PL_defgv);
		1107
		1108	yieldstack = *hv_fetch (
		1109	(HV *)SvRV (GvSV (coro_current)),
		1110	"yieldstack", sizeof ("yieldstack") - 1,
		1111	0
		1112	);
		1113
		1114	/* set up @_ -- ugly */
		1115	av_clear (defav);
		1116	av_fill (defav, items - 1);
		1117	while (items--)
		1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1119
		1120	sv = av_pop ((AV *)SvRV (yieldstack));
		1121	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1122	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1123	ta.flags = 0;
		1124	SvREFCNT_dec (sv);
		1125	}
		1126	break;
		1127
		1128	}
		1129
		1130	TRANSFER (ta);
		1131	}
1014		1132
1015	void	1133	void
1016	DESTROY(coro)	1134	_clone_state_from (SV *dst, SV *src)
1017	Coro::State coro	1135	CODE:
1018	CODE:	1136	{
		1137	struct coro *coro_src = SvSTATE (src);
1019		1138
1020	if (coro->mainstack && coro->mainstack != main_mainstack)	1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1021	{
1022	struct coro temp;
1023		1140
1024	PUTBACK;	1141	++coro_src->refcnt;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1026	LOAD (aTHX_ coro);	1143	}
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		1144
1041	void	1145	void
1042	_exit(code)	1146	_exit (code)
1043	int code	1147	int code
1044	PROTOTYPE: $	1148	PROTOTYPE: $
1045	CODE:	1149	CODE:
1046	_exit (code);	1150	_exit (code);
1047		1151
1048	MODULE = Coro::State PACKAGE = Coro::Cont
1049
1050	# this is slightly dirty (should expose a c-level api)
1051
1052	void
1053	yield(...)
1054	PROTOTYPE: @
1055	CODE:
1056	SV *yieldstack;
1057	SV *sv;
1058	AV *defav = GvAV (PL_defgv);
1059	struct coro *prev, *next;
1060
1061	yieldstack = *hv_fetch (
1062	(HV *)SvRV (GvSV (coro_current)),
1063	"yieldstack", sizeof ("yieldstack") - 1,
1064	0
1065	);
1066
1067	/* set up @_ -- ugly */
1068	av_clear (defav);
1069	av_fill (defav, items - 1);
1070	while (items--)
1071	av_store (defav, items, SvREFCNT_inc (ST(items)));
1072
1073	sv = av_pop ((AV *)SvRV (yieldstack));
1074	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1075	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1076	SvREFCNT_dec (sv);
1077
1078	transfer (aTHX_ prev, next, 0);
1079
1080	MODULE = Coro::State PACKAGE = Coro	1152	MODULE = Coro::State PACKAGE = Coro
1081		1153
1082	# this is slightly dirty (should expose a c-level api)
1083
1084	BOOT:	1154	BOOT:
1085	{	1155	{
1086	int i;	1156	int i;
		1157
1087	HV *stash = gv_stashpv ("Coro", TRUE);	1158	coro_stash = gv_stashpv ("Coro", TRUE);
1088		1159
1089	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1160	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1090	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1161	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1091	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1092	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1093	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1094	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1095		1166
1096	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1097	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1098		1169
1099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1107	coroapi.ready = api_ready;	1178	coroapi.ready = api_ready;
1108	coroapi.nready = &coro_nready;	1179	coroapi.nready = &coro_nready;
1109	coroapi.current = coro_current;	1180	coroapi.current = coro_current;
1110		1181
1111	GCoroAPI = &coroapi;	1182	GCoroAPI = &coroapi;
1112	sv_setiv(sv, (IV)&coroapi);	1183	sv_setiv (sv, (IV)&coroapi);
1113	SvREADONLY_on(sv);	1184	SvREADONLY_on (sv);
1114	}	1185	}
1115	}	1186	}
1116		1187
1117	#if !PERL_MICRO	1188	int
		1189	prio (Coro::State coro, int newprio = 0)
		1190	ALIAS:
		1191	nice = 1
		1192	CODE:
		1193	{
		1194	RETVAL = coro->prio;
		1195
		1196	if (items > 1)
		1197	{
		1198	if (ix)
		1199	newprio += coro->prio;
		1200
		1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1203
		1204	coro->prio = newprio;
		1205	}
		1206	}
1118		1207
1119	void	1208	void
1120	ready(self)	1209	ready (SV *self)
1121	SV * self
1122	PROTOTYPE: $	1210	PROTOTYPE: $
1123	CODE:	1211	CODE:
1124	api_ready (self);	1212	api_ready (self);
1125		1213
1126	#endif
1127
1128	int	1214	int
1129	nready(...)	1215	nready (...)
1130	PROTOTYPE:	1216	PROTOTYPE:
1131	CODE:	1217	CODE:
1132	RETVAL = coro_nready;	1218	RETVAL = coro_nready;
1133	OUTPUT:	1219	OUTPUT:
1134	RETVAL	1220	RETVAL
1135		1221
		1222	MODULE = Coro::State PACKAGE = Coro::AIO
		1223
		1224	SV *
		1225	_get_state ()
		1226	CODE:
		1227	{
		1228	struct {
		1229	int errorno;
		1230	int laststype;
		1231	int laststatval;
		1232	Stat_t statcache;
		1233	} data;
		1234
		1235	data.errorno = errno;
		1236	data.laststype = PL_laststype;
		1237	data.laststatval = PL_laststatval;
		1238	data.statcache = PL_statcache;
		1239
		1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1241	}
		1242	OUTPUT:
		1243	RETVAL
		1244
1136	void	1245	void
1137	schedule(...)	1246	_set_state (char *data_)
1138	PROTOTYPE:	1247	PROTOTYPE: $
1139	CODE:	1248	CODE:
1140	api_schedule ();	1249	{
		1250	struct {
		1251	int errorno;
		1252	int laststype;
		1253	int laststatval;
		1254	Stat_t statcache;
		1255	} *data = (void *)data_;
1141		1256
1142	void	1257	errno = data->errorno;
1143	cede(...)	1258	PL_laststype = data->laststype;
1144	PROTOTYPE:	1259	PL_laststatval = data->laststatval;
1145	CODE:	1260	PL_statcache = data->statcache;
1146	api_cede ();	1261	}
1147

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