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Comparing Coro/Coro/State.xs (file contents):
Revision 1.70 by root, Mon Dec 26 19:26:52 2005 UTC vs.
Revision 1.102 by root, Mon Nov 27 01:28:03 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
		36	#include <stdio.h>
32	#include <errno.h>	37	#include <errno.h>
33	#include <signal.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
34		46
35	#ifdef HAVE_MMAP	47	#ifdef HAVE_MMAP
36	# include <unistd.h>	48	# include <unistd.h>
37	# include <sys/mman.h>	49	# include <sys/mman.h>
38	# ifndef MAP_ANONYMOUS	50	# ifndef MAP_ANONYMOUS
…		…
40	# define MAP_ANONYMOUS MAP_ANON	52	# define MAP_ANONYMOUS MAP_ANON
41	# else	53	# else
42	# undef HAVE_MMAP	54	# undef HAVE_MMAP
43	# endif	55	# endif
44	# 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
45	#endif	64	# endif
46		65	#endif
47	#define SUB_INIT "Coro::State::initialize"
48	#define UCORO_STATE "_coro_state"
49		66
50	/* 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
51	* 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
52	* and should be unique. */	69	* and should be unique. */
		70	#define dSTACKLEVEL int stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	71	#define STACKLEVEL ((void *)&stacklevel)
54		72
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	73	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		74
57	#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))
58		82
59	#include "CoroAPI.h"	83	#include "CoroAPI.h"
		84
		85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
60		86
61	#ifdef USE_ITHREADS	87	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	88	static perl_mutex coro_mutex;
63	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
67	# define UNLOCK (void)0	93	# define UNLOCK (void)0
68	#endif	94	#endif
69		95
70	static struct CoroAPI coroapi;	96	static struct CoroAPI coroapi;
71	static AV *main_mainstack; /* used to differentiate between $main and others */	97	static AV *main_mainstack; /* used to differentiate between $main and others */
72	static HV *coro_state_stash;	98	static HV *coro_state_stash, *coro_stash;
73	static SV *ucoro_state_sv;
74	static U32 ucoro_state_hash;
75	static SV *coro_mortal; /* will be freed after next transfer */	99	static SV *coro_mortal; /* will be freed after next transfer */
76		100
77	/* this is actually not only the c stack but also c registers etc... */	101	/* this is a structure representing a c-level coroutine */
78	typedef struct {	102	typedef struct coro_stack {
79	int refcnt; /* pointer reference counter */	103	struct coro_stack *next;
80	int usecnt; /* shared by how many coroutines */
81	int gencnt; /* generation counter */
82		104
83	coro_context cctx;	105	/* the stack */
84
85	void *sptr;	106	void *sptr;
86	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;
87	} coro_stack;	113	} coro_stack;
88		114
		115	/* this is a structure representing a perl-level coroutine */
89	struct coro {	116	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	117	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;
92
93	/* the optional C context */
94	coro_stack *stack;	118	coro_stack *stack;
95	void *cursp;	119
		120	/* data associated with this coroutine (initial args) */
		121	AV *args;
96	int gencnt;	122	int refcnt;
97		123
98	/* optionally saved, might be zero */	124	/* optionally saved, might be zero */
99	AV *defav;	125	AV *defav;
100	SV *defsv;	126	SV *defsv;
101	SV *errsv;	127	SV *errsv;
…		…
131	OP **retstack;	157	OP **retstack;
132	I32 retstack_ix;	158	I32 retstack_ix;
133	I32 retstack_max;	159	I32 retstack_max;
134	PMOP *curpm;	160	PMOP *curpm;
135	COP *curcop;	161	COP *curcop;
136	JMPENV *top_env;
137		162
138	/* data associated with this coroutine (initial args) */	163	/* coro process data */
139	AV *args;	164	int prio;
140	};	165	};
141		166
142	typedef struct coro *Coro__State;	167	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	168	typedef struct coro *Coro__State_or_hashref;
144		169
145	/* mostly copied from op.c:cv_clone2 */	170	static AV *
146	STATIC AV *	171	coro_clone_padlist (CV *cv)
147	clone_padlist (pTHX_ AV *protopadlist)
148	{	172	{
149	AV *av;	173	AV *padlist = CvPADLIST (cv);
150	I32 ix;
151	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
152	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
153	SV **pname = AvARRAY (protopad_name);
154	SV **ppad = AvARRAY (protopad);
155	I32 fname = AvFILLp (protopad_name);
156	I32 fpad = AvFILLp (protopad);
157	AV *newpadlist, *newpad_name, *newpad;	174	AV *newpadlist, *newpad;
158	SV **npad;
159
160	newpad_name = newAV ();
161	for (ix = fname; ix >= 0; ix--)
162	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164	newpad = newAV ();
165	av_fill (newpad, AvFILLp (protopad));
166	npad = AvARRAY (newpad);
167		175
168	newpadlist = newAV ();	176	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	177	AvREAL_off (newpadlist);
170	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)));
171	av_store (newpadlist, 1, (SV *) newpad);	187	av_store (newpadlist, 1, (SV *)newpad);
172
173	av = newAV (); /* will be @_ */
174	av_extend (av, 0);
175	av_store (newpad, 0, (SV *) av);
176	AvFLAGS (av) = AVf_REIFY;
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char *name = SvPVX (namesv); /* XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV *kid = cv_clone((CV*)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		188
242	return newpadlist;	189	return newpadlist;
243	}	190	}
244		191
245	STATIC void	192	static void
246	free_padlist (pTHX_ AV *padlist)	193	free_padlist (AV *padlist)
247	{	194	{
248	/* may be during global destruction */	195	/* may be during global destruction */
249	if (SvREFCNT (padlist))	196	if (SvREFCNT (padlist))
250	{	197	{
251	I32 i = AvFILLp (padlist);	198	I32 i = AvFILLp (padlist);
…		…
264		211
265	SvREFCNT_dec ((SV*)padlist);	212	SvREFCNT_dec ((SV*)padlist);
266	}	213	}
267	}	214	}
268		215
269	STATIC int	216	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	217	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	218	{
272	AV *padlist;	219	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	220	AV *av = (AV *)mg->mg_obj;
274		221
275	/* casting is fun. */	222	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	224	free_padlist (padlist);
278		225
279	SvREFCNT_dec (av);	226	SvREFCNT_dec (av);
		227
		228	return 0;
280	}	229	}
281		230
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	231	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		232
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		234
286	/* the next two functions merely cache the padlists */	235	/* the next two functions merely cache the padlists */
287	STATIC void	236	static void
288	get_padlist (pTHX_ CV *cv)	237	get_padlist (CV *cv)
289	{	238	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291		240
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
294	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
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
296	}	255	}
297		256
298	STATIC void	257	static void
299	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
300	{	259	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302		261
303	if (!mg)	262	if (!mg)
304	{	263	{
…		…
312	}	271	}
313		272
314	#define SB do {	273	#define SB do {
315	#define SE } while (0)	274	#define SE } while (0)
316		275
317	#define LOAD(state) load_state(aTHX_ (state));	276	#define LOAD(state) load_state((state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	277	#define SAVE(state,flags) save_state((state),(flags));
319		278
320	#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
321		280
322	static void	281	static void
323	load_state(pTHX_ Coro__State c)	282	load_state(Coro__State c)
324	{	283	{
325	PL_dowarn = c->dowarn;	284	PL_dowarn = c->dowarn;
326	PL_in_eval = c->in_eval;	285	PL_in_eval = c->in_eval;
327		286
328	PL_curstackinfo = c->curstackinfo;	287	PL_curstackinfo = c->curstackinfo;
…		…
346	PL_scopestack_ix = c->scopestack_ix;	305	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;	306	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;	307	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;	308	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
		310	#if !PERL_VERSION_ATLEAST (5,9,0)
351	PL_retstack = c->retstack;	311	PL_retstack = c->retstack;
352	PL_retstack_ix = c->retstack_ix;	312	PL_retstack_ix = c->retstack_ix;
353	PL_retstack_max = c->retstack_max;	313	PL_retstack_max = c->retstack_max;
		314	#endif
354	PL_curpm = c->curpm;	315	PL_curpm = c->curpm;
355	PL_curcop = c->curcop;	316	PL_curcop = c->curcop;
356	PL_top_env = c->top_env;
357		317
358	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
359	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
360	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
361		321
…		…
368	{	328	{
369	AV *padlist = (AV *)POPs;	329	AV *padlist = (AV *)POPs;
370		330
371	if (padlist)	331	if (padlist)
372	{	332	{
373	put_padlist (aTHX_ cv); /* mark this padlist as available */	333	put_padlist (cv); /* mark this padlist as available */
374	CvPADLIST(cv) = padlist;	334	CvPADLIST(cv) = padlist;
375	}	335	}
376		336
377	++CvDEPTH(cv);	337	++CvDEPTH(cv);
378	}	338	}
…		…
380	PUTBACK;	340	PUTBACK;
381	}	341	}
382	}	342	}
383		343
384	static void	344	static void
385	save_state(pTHX_ Coro__State c, int flags)	345	save_state(Coro__State c, int flags)
386	{	346	{
387	{	347	{
388	dSP;	348	dSP;
389	I32 cxix = cxstack_ix;	349	I32 cxix = cxstack_ix;
390	PERL_CONTEXT *ccstk = cxstack;	350	PERL_CONTEXT *ccstk = cxstack;
…		…
418	}	378	}
419		379
420	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST(cv));
421	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
422		382
423	get_padlist (aTHX_ cv); /* this is a monster */	383	get_padlist (cv);
424	}	384	}
425	}	385	}
426	#ifdef CXt_FORMAT	386	#ifdef CXt_FORMAT
427	else if (CxTYPE(cx) == CXt_FORMAT)	387	else if (CxTYPE(cx) == CXt_FORMAT)
428	{	388	{
…		…
472	c->scopestack_ix = PL_scopestack_ix;	432	c->scopestack_ix = PL_scopestack_ix;
473	c->scopestack_max = PL_scopestack_max;	433	c->scopestack_max = PL_scopestack_max;
474	c->savestack = PL_savestack;	434	c->savestack = PL_savestack;
475	c->savestack_ix = PL_savestack_ix;	435	c->savestack_ix = PL_savestack_ix;
476	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
		437	#if !PERL_VERSION_ATLEAST (5,9,0)
477	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
478	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
479	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
		441	#endif
480	c->curpm = PL_curpm;	442	c->curpm = PL_curpm;
481	c->curcop = PL_curcop;	443	c->curcop = PL_curcop;
482	c->top_env = PL_top_env;
483	}	444	}
484		445
485	/*	446	/*
486	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
487	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
488	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
489	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
490	*/	451	*/
491	STATIC void	452	static void
492	coro_init_stacks (pTHX)	453	coro_init_stacks ()
493	{	454	{
494	LOCK;
495
496	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
497	PL_curstackinfo->si_type = PERLSI_MAIN;	456	PL_curstackinfo->si_type = PERLSI_MAIN;
498	PL_curstack = PL_curstackinfo->si_stack;	457	PL_curstack = PL_curstackinfo->si_stack;
499	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
500		459
…		…
521		480
522	New(54,PL_savestack,96,ANY);	481	New(54,PL_savestack,96,ANY);
523	PL_savestack_ix = 0;	482	PL_savestack_ix = 0;
524	PL_savestack_max = 96;	483	PL_savestack_max = 96;
525		484
		485	#if !PERL_VERSION_ATLEAST (5,9,0)
526	New(54,PL_retstack,8,OP*);	486	New(54,PL_retstack,8,OP*);
527	PL_retstack_ix = 0;	487	PL_retstack_ix = 0;
528	PL_retstack_max = 8;	488	PL_retstack_max = 8;
529		489	#endif
530	UNLOCK;
531	}	490	}
532		491
533	/*	492	/*
534	* destroy the stacks, the callchain etc...	493	* destroy the stacks, the callchain etc...
535	*/	494	*/
536	STATIC void	495	static void
537	destroy_stacks(pTHX)	496	coro_destroy_stacks()
538	{	497	{
539	if (!IN_DESTRUCT)	498	if (!IN_DESTRUCT)
540	{	499	{
541	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
542	LEAVE_SCOPE (0);	501	LEAVE_SCOPE (0);
…		…
573		532
574	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
575	Safefree (PL_markstack);	534	Safefree (PL_markstack);
576	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
577	Safefree (PL_savestack);	536	Safefree (PL_savestack);
		537	#if !PERL_VERSION_ATLEAST (5,9,0)
578	Safefree (PL_retstack);	538	Safefree (PL_retstack);
579	}
580
581	static void
582	allocate_stack (Coro__State ctx, int alloc)
583	{
584	coro_stack *stack;
585
586	New (0, stack, 1, coro_stack);
587
588	stack->refcnt = 1;
589	stack->usecnt = 1;
590	stack->gencnt = ctx->gencnt = 0;
591
592	if (alloc)
593	{
594	#if HAVE_MMAP
595	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
596	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
597	if (stack->sptr == (void *)-1)
598	#endif	539	#endif
599	{
600	/*FIXME*//*D*//* reasonable stack size! */
601	stack->ssize = - (STACKSIZE * sizeof (long));
602	New (0, stack->sptr, STACKSIZE, long);
603	}
604	}
605	else
606	stack->sptr = 0;
607
608	ctx->stack = stack;
609	}	540	}
610		541
611	static void	542	static void
612	deallocate_stack (Coro__State ctx)	543	setup_coro (struct coro *coro)
613	{
614	coro_stack *stack = ctx->stack;
615
616	ctx->stack = 0;
617
618	if (stack)
619	{
620	if (!--stack->refcnt)
621	{
622	#ifdef HAVE_MMAP
623	if (stack->ssize > 0 && stack->sptr)
624	munmap (stack->sptr, stack->ssize);
625	else
626	#endif
627	Safefree (stack->sptr);
628
629	Safefree (stack);
630	}
631	else if (ctx->gencnt == stack->gencnt)
632	--stack->usecnt;
633	}
634	}
635
636	static void
637	setup_coro (void *arg)
638	{	544	{
639	/*	545	/*
640	* emulate part of the perl startup here.	546	* emulate part of the perl startup here.
641	*/	547	*/
642	dTHX;
643	dSP;
644	Coro__State ctx = (Coro__State)arg;
645	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
646		548
647	coro_init_stacks (aTHX);	549	coro_init_stacks ();
		550
		551	{
		552	dSP;
		553	LOGOP myop;
		554
648	/*PL_curcop = 0;*/	555	/*PL_curcop = 0;*/
649	/*PL_in_eval = PL_in_eval;*/ /* inherit */	556	PL_in_eval = 0;
650	SvREFCNT_dec (GvAV (PL_defgv));	557	SvREFCNT_dec (GvAV (PL_defgv));
651	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	558	GvAV (PL_defgv) = coro->args; coro->args = 0;
652		559
653	SPAGAIN;	560	SPAGAIN;
654		561
655	if (ctx->stack)
656	{
657	ctx->cursp = 0;
658
659	PUSHMARK(SP);
660	PUTBACK;
661	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
662
663	if (SvTRUE (ERRSV))
664	croak (NULL);
665	else
666	croak ("FATAL: CCTXT coroutine returned!");
667	}
668	else
669	{
670	UNOP myop;
671
672	PL_op = (OP *)&myop;
673
674	Zero(&myop, 1, UNOP);	562	Zero (&myop, 1, LOGOP);
675	myop.op_next = Nullop;	563	myop.op_next = Nullop;
676	myop.op_flags = OPf_WANT_VOID;	564	myop.op_flags = OPf_WANT_VOID;
677		565
		566	PL_op = (OP *)&myop;
		567
678	PUSHMARK(SP);	568	PUSHMARK (SP);
679	XPUSHs (sub_init);	569	PUSHMARK (SP);
680	/*	570	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
681	* the next line is slightly wrong, as PL_op->op_next
682	* is actually being executed so we skip the first op.
683	* that doesn't matter, though, since it is only
684	* pp_nextstate and we never return...
685	* ah yes, and I don't care anyways ;)
686	*/
687	PUTBACK;	571	PUTBACK;
688	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	572	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
689	SPAGAIN;	573	SPAGAIN;
690		574
691	ENTER; /* necessary e.g. for dounwind */	575	ENTER; /* necessary e.g. for dounwind */
692	}	576	}
693	}	577	}
694		578
695	static void	579	static void
696	continue_coro (void *arg)	580	free_coro_mortal ()
697	{	581	{
698	/*
699	* this is a _very_ stripped down perl interpreter ;)
700	*/
701	dTHX;
702	Coro__State ctx = (Coro__State)arg;
703	JMPENV coro_start_env;
704
705	PL_top_env = &ctx->start_env;
706
707	ctx->cursp = 0;
708	PL_op = PL_op->op_next;
709	CALLRUNOPS(aTHX);
710
711	abort ();
712	}
713
714	STATIC void
715	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
716	{
717	dSTACKLEVEL;
718
719	if (prev != next)
720	{
721	if (next->mainstack)
722	{
723	LOCK;
724	SAVE (prev, flags);
725	LOAD (next);
726	UNLOCK;
727
728	/* mark this state as in-use */
729	next->mainstack = 0;
730	next->tmps_ix = -2;
731
732	/* stacklevel changed? if yes, grab the stack for us! */
733	if (flags & TRANSFER_SAVE_CCTXT)
734	{
735	if (!prev->stack)
736	allocate_stack (prev, 0);
737	else if (prev->cursp != stacklevel
738	&& prev->stack->usecnt > 1)
739	{
740	prev->gencnt = ++prev->stack->gencnt;
741	prev->stack->usecnt = 1;
742	}
743
744	/* has our stack been invalidated? */
745	if (next->stack && next->stack->gencnt != next->gencnt)
746	{
747	deallocate_stack (next);
748	allocate_stack (next, 1);
749	coro_create (&(next->stack->cctx),
750	continue_coro, (void *)next,
751	next->stack->sptr, labs (next->stack->ssize));
752	}
753
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	else
759	next->cursp = stacklevel;
760	}
761	else if (next->tmps_ix == -2)
762	croak ("tried to transfer to running coroutine");
763	else
764	{
765	LOCK;
766	SAVE (prev, -1); /* first get rid of the old state */
767	UNLOCK;
768
769	if (flags & TRANSFER_SAVE_CCTXT)
770	{
771	if (!prev->stack)
772	allocate_stack (prev, 0);
773
774	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
775	{
776	PL_top_env = &next->start_env;
777
778	setup_coro (next);
779	next->cursp = stacklevel;
780
781	prev->stack->refcnt++;
782	prev->stack->usecnt++;
783	next->stack = prev->stack;
784	next->gencnt = prev->gencnt;
785	}
786	else
787	{
788	assert (!next->stack);
789	allocate_stack (next, 1);
790	coro_create (&(next->stack->cctx),
791	setup_coro, (void *)next,
792	next->stack->sptr, labs (next->stack->ssize));
793	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
794	prev->cursp = stacklevel;
795	/* don't add any code here */
796	}
797	}
798	else
799	{
800	setup_coro (next);
801	next->cursp = stacklevel;
802	}
803	}
804	}
805
806	LOCK;
807	if (coro_mortal)	582	if (coro_mortal)
808	{	583	{
809	SvREFCNT_dec (coro_mortal);	584	SvREFCNT_dec (coro_mortal);
810	coro_mortal = 0;	585	coro_mortal = 0;
811	}	586	}
		587	}
		588
		589	static void NOINLINE
		590	prepare_cctx (coro_stack *cctx)
		591	{
		592	dSP;
		593	LOGOP myop;
		594
		595	Zero (&myop, 1, LOGOP);
		596	myop.op_next = PL_op;
		597	myop.op_flags = OPf_WANT_VOID;
		598
		599	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
		600
		601	PUSHMARK (SP);
		602	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		603	PUTBACK;
		604	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		605	SPAGAIN;
		606	}
		607
		608	static void
		609	coro_run (void *arg)
		610	{
		611	/* coro_run is the alternative epilogue of transfer() */
812	UNLOCK;	612	UNLOCK;
813	}
814		613
815	#define SV_CORO(sv,func) \	614	/*
816	do { \	615	* this is a _very_ stripped down perl interpreter ;)
817	if (SvROK (sv)) \	616	*/
818	sv = SvRV (sv); \	617	PL_top_env = &PL_start_env;
819	\	618	/* inject call to cctx_init */
820	if (SvTYPE (sv) == SVt_PVHV) \	619	prepare_cctx ((coro_stack *)arg);
821	{ \
822	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
823	\
824	if (!he) \
825	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
826	\
827	(sv) = SvRV (HeVAL(he)); \
828	} \
829	\
830	/* must also be changed inside Coro::Cont::yield */ \
831	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
832	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
833	\
834	} while(0)
835		620
836	#define SvSTATE(sv) (struct coro *)SvIV (sv)	621	/* somebody will hit me for both perl_run and PL_restartop */
		622	perl_run (PL_curinterp);
837		623
		624	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		625	abort ();
		626	}
		627
		628	static coro_stack *
		629	stack_new ()
		630	{
		631	coro_stack *stack;
		632
		633	New (0, stack, 1, coro_stack);
		634
		635	#if HAVE_MMAP
		636
		637	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		638	/* mmap suppsedly does allocate-on-write for us */
		639	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		640
		641	if (stack->sptr == (void *)-1)
		642	{
		643	perror ("FATAL: unable to mmap stack for coroutine");
		644	_exit (EXIT_FAILURE);
		645	}
		646
		647	# if STACKGUARD
		648	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		649	# endif
		650
		651	#else
		652
		653	stack->ssize = STACKSIZE * (long)sizeof (long);
		654	New (0, stack->sptr, STACKSIZE, long);
		655
		656	if (!stack->sptr)
		657	{
		658	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		659	_exit (EXIT_FAILURE);
		660	}
		661
		662	#endif
		663
		664	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		665
		666	return stack;
		667	}
		668
		669	static void
		670	stack_free (coro_stack *stack)
		671	{
		672	if (!stack)
		673	return;
		674
		675	#if HAVE_MMAP
		676	munmap (stack->sptr, stack->ssize);
		677	#else
		678	Safefree (stack->sptr);
		679	#endif
		680
		681	Safefree (stack);
		682	}
		683
		684	static coro_stack *stack_first;
		685	static int cctx_count, cctx_idle;
		686
		687	static coro_stack *
		688	stack_get ()
		689	{
		690	coro_stack *stack;
		691
		692	if (stack_first)
		693	{
		694	--cctx_idle;
		695	stack = stack_first;
		696	stack_first = stack->next;
		697	}
		698	else
		699	{
		700	++cctx_count;
		701	stack = stack_new ();
		702	PL_op = PL_op->op_next;
		703	}
		704
		705	return stack;
		706	}
		707
		708	static void
		709	stack_put (coro_stack *stack)
		710	{
		711	++cctx_idle;
		712	stack->next = stack_first;
		713	stack_first = stack;
		714	}
		715
		716	/* never call directly, always through the coro_state_transfer global variable */
		717	static void NOINLINE
		718	transfer (struct coro *prev, struct coro *next, int flags)
		719	{
		720	dSTACKLEVEL;
		721
		722	/* sometimes transfer is only called to set idle_sp */
		723	if (flags == TRANSFER_SET_STACKLEVEL)
		724	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		725	else if (prev != next)
		726	{
		727	coro_stack *prev__stack;
		728
		729	LOCK;
		730
		731	if (next->mainstack)
		732	{
		733	/* coroutine already started */
		734	SAVE (prev, flags);
		735	LOAD (next);
		736	}
		737	else
		738	{
		739	/* need to start coroutine */
		740	/* first get rid of the old state */
		741	SAVE (prev, -1);
		742	/* setup coroutine call */
		743	setup_coro (next);
		744	/* need a stack */
		745	next->stack = 0;
		746	}
		747
		748	if (!prev->stack)
		749	/* create a new empty context */
		750	Newz (0, prev->stack, 1, coro_stack);
		751
		752	prev__stack = prev->stack;
		753
		754	/* possibly "free" the stack */
		755	if (prev__stack->idle_sp == STACKLEVEL)
		756	{
		757	stack_put (prev__stack);
		758	prev->stack = 0;
		759	}
		760
		761	if (!next->stack)
		762	next->stack = stack_get ();
		763
		764	if (prev__stack != next->stack)
		765	{
		766	prev__stack->top_env = PL_top_env;
		767	PL_top_env = next->stack->top_env;
		768	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		769	}
		770
		771	free_coro_mortal ();
		772
		773	UNLOCK;
		774	}
		775	}
		776
		777	struct transfer_args
		778	{
		779	struct coro *prev, *next;
		780	int flags;
		781	};
		782
		783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		784
		785	static void
		786	coro_state_destroy (struct coro *coro)
		787	{
		788	if (coro->refcnt--)
		789	return;
		790
		791	if (coro->mainstack && coro->mainstack != main_mainstack)
		792	{
		793	struct coro temp;
		794
		795	SAVE ((&temp), TRANSFER_SAVE_ALL);
		796	LOAD (coro);
		797
		798	coro_destroy_stacks ();
		799
		800	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		801
		802	coro->mainstack = 0;
		803	}
		804
		805	stack_free (coro->stack);
		806	SvREFCNT_dec (coro->args);
		807	Safefree (coro);
		808	}
		809
838	static void	810	static int
		811	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		812	{
		813	struct coro *coro = (struct coro *)mg->mg_ptr;
		814	mg->mg_ptr = 0;
		815
		816	coro_state_destroy (coro);
		817
		818	return 0;
		819	}
		820
		821	static int
		822	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		823	{
		824	struct coro *coro = (struct coro *)mg->mg_ptr;
		825
		826	++coro->refcnt;
		827
		828	return 0;
		829	}
		830
		831	static MGVTBL coro_state_vtbl = {
		832	0, 0, 0, 0,
		833	coro_state_clear,
		834	0,
		835	#ifdef MGf_DUP
		836	coro_state_dup,
		837	#else
		838	# define MGf_DUP 0
		839	#endif
		840	};
		841
		842	static struct coro *
		843	SvSTATE (SV *coro)
		844	{
		845	HV *stash;
		846	MAGIC *mg;
		847
		848	if (SvROK (coro))
		849	coro = SvRV (coro);
		850
		851	stash = SvSTASH (coro);
		852	if (stash != coro_stash && stash != coro_state_stash)
		853	{
		854	/* very slow, but rare, check */
		855	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		856	croak ("Coro::State object required");
		857	}
		858
		859	mg = SvMAGIC (coro);
		860	assert (mg->mg_type == PERL_MAGIC_ext);
		861	return (struct coro *)mg->mg_ptr;
		862	}
		863
		864	static void
		865	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		866	{
		867	ta->prev = SvSTATE (prev);
		868	ta->next = SvSTATE (next);
		869	ta->flags = flags;
		870	}
		871
		872	static void
839	api_transfer(pTHX_ SV *prev, SV *next, int flags)	873	api_transfer (SV *prev, SV *next, int flags)
840	{	874	{
841	SV_CORO (prev, "Coro::transfer");	875	dTHX;
842	SV_CORO (next, "Coro::transfer");	876	struct transfer_args ta;
843		877
844	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	878	prepare_transfer (&ta, prev, next, flags);
		879	TRANSFER (ta);
845	}	880	}
846		881
847	/** Coro ********************************************************************/	882	/** Coro ********************************************************************/
848		883
849	#define PRIO_MAX 3	884	#define PRIO_MAX 3
…		…
853	#define PRIO_IDLE -3	888	#define PRIO_IDLE -3
854	#define PRIO_MIN -4	889	#define PRIO_MIN -4
855		890
856	/* for Coro.pm */	891	/* for Coro.pm */
857	static GV *coro_current, *coro_idle;	892	static GV *coro_current, *coro_idle;
858	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	893	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
859	static int coro_nready;	894	static int coro_nready;
860		895
861	static void	896	static void
862	coro_enq (pTHX_ SV *sv)	897	coro_enq (SV *sv)
863	{	898	{
		899	int prio;
		900
864	if (SvTYPE (sv) == SVt_PVHV)	901	if (SvTYPE (sv) != SVt_PVHV)
865	{
866	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
867	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
868
869	prio = prio > PRIO_MAX ? PRIO_MAX
870	: prio < PRIO_MIN ? PRIO_MIN
871	: prio;
872
873	av_push (coro_ready [prio - PRIO_MIN], sv);
874	coro_nready++;
875
876	return;
877	}
878
879	croak ("Coro::ready tried to enqueue something that is not a coroutine");	902	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		903
		904	prio = SvSTATE (sv)->prio;
		905
		906	av_push (coro_ready [prio - PRIO_MIN], sv);
		907	coro_nready++;
880	}	908	}
881		909
882	static SV *	910	static SV *
883	coro_deq (pTHX_ int min_prio)	911	coro_deq (int min_prio)
884	{	912	{
885	int prio = PRIO_MAX - PRIO_MIN;	913	int prio = PRIO_MAX - PRIO_MIN;
886		914
887	min_prio -= PRIO_MIN;	915	min_prio -= PRIO_MIN;
888	if (min_prio < 0)	916	if (min_prio < 0)
889	min_prio = 0;	917	min_prio = 0;
890		918
891	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	919	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
892	if (av_len (coro_ready[prio]) >= 0)	920	if (AvFILLp (coro_ready [prio]) >= 0)
893	{	921	{
894	coro_nready--;	922	coro_nready--;
895	return av_shift (coro_ready[prio]);	923	return av_shift (coro_ready [prio]);
896	}	924	}
897		925
898	return 0;	926	return 0;
899	}	927	}
900		928
…		…
905		933
906	if (SvROK (coro))	934	if (SvROK (coro))
907	coro = SvRV (coro);	935	coro = SvRV (coro);
908		936
909	LOCK;	937	LOCK;
910	coro_enq (aTHX_ SvREFCNT_inc (coro));	938	coro_enq (SvREFCNT_inc (coro));
911	UNLOCK;	939	UNLOCK;
912	}	940	}
913		941
914	static void	942	static void
		943	prepare_schedule (struct transfer_args *ta)
		944	{
		945	SV *current, *prev, *next;
		946
		947	current = GvSV (coro_current);
		948
		949	for (;;)
		950	{
		951	LOCK;
		952	next = coro_deq (PRIO_MIN);
		953	UNLOCK;
		954
		955	if (next)
		956	break;
		957
		958	{
		959	dSP;
		960
		961	ENTER;
		962	SAVETMPS;
		963
		964	PUSHMARK (SP);
		965	PUTBACK;
		966	call_sv (GvSV (coro_idle), G_DISCARD);
		967
		968	FREETMPS;
		969	LEAVE;
		970	}
		971	}
		972
		973	prev = SvRV (current);
		974	SvRV (current) = next;
		975
		976	/* free this only after the transfer */
		977	LOCK;
		978	free_coro_mortal ();
		979	UNLOCK;
		980	coro_mortal = prev;
		981
		982	ta->prev = SvSTATE (prev);
		983	ta->next = SvSTATE (next);
		984	ta->flags = TRANSFER_SAVE_ALL;
		985	}
		986
		987	static void
		988	prepare_cede (struct transfer_args *ta)
		989	{
		990	LOCK;
		991	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		992	UNLOCK;
		993
		994	prepare_schedule (ta);
		995	}
		996
		997	static void
915	api_schedule (void)	998	api_schedule (void)
916	{	999	{
917	dTHX;	1000	dTHX;
		1001	struct transfer_args ta;
918		1002
919	SV *prev, *next;	1003	prepare_schedule (&ta);
920		1004	TRANSFER (ta);
921	LOCK;
922
923	prev = SvRV (GvSV (coro_current));
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (!next)
927	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
928
929	/* free this only after the transfer */
930	coro_mortal = prev;
931	SV_CORO (prev, "Coro::schedule");
932
933	SvRV (GvSV (coro_current)) = next;
934
935	SV_CORO (next, "Coro::schedule");
936
937	UNLOCK;
938
939	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
940	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
941	}	1005	}
942		1006
943	static void	1007	static void
944	api_cede (void)	1008	api_cede (void)
945	{	1009	{
946	dTHX;	1010	dTHX;
		1011	struct transfer_args ta;
947		1012
948	LOCK;	1013	prepare_cede (&ta);
949	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1014	TRANSFER (ta);
950	UNLOCK;
951
952	api_schedule ();
953	}	1015	}
954		1016
955	MODULE = Coro::State PACKAGE = Coro::State	1017	MODULE = Coro::State PACKAGE = Coro::State
956		1018
957	PROTOTYPES: ENABLE	1019	PROTOTYPES: DISABLE
958		1020
959	BOOT:	1021	BOOT:
960	{ /* {} necessary for stoopid perl-5.6.x */	1022	{
961	#ifdef USE_ITHREADS	1023	#ifdef USE_ITHREADS
962	MUTEX_INIT (&coro_mutex);	1024	MUTEX_INIT (&coro_mutex);
963	#endif	1025	#endif
		1026	BOOT_PAGESIZE;
964		1027
965	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
966	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
967	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1028	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
968		1029
969	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1030	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
970	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1031	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
971	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1032	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
972	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
973		1033
974	main_mainstack = PL_mainstack;	1034	main_mainstack = PL_mainstack;
975		1035
976	coroapi.ver = CORO_API_VERSION;	1036	coroapi.ver = CORO_API_VERSION;
977	coroapi.transfer = api_transfer;	1037	coroapi.transfer = api_transfer;
978	}
979		1038
980	Coro::State	1039	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
981	_newprocess(args)	1040	}
982	SV * args	1041
983	PROTOTYPE: $	1042	SV *
		1043	new (char *klass, ...)
984	CODE:	1044	CODE:
985	Coro__State coro;	1045	{
		1046	struct coro *coro;
		1047	HV *hv;
		1048	int i;
986		1049
987	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
988	croak ("Coro::State::_newprocess expects an arrayref");
989
990	Newz (0, coro, 1, struct coro);	1050	Newz (0, coro, 1, struct coro);
		1051	coro->args = newAV ();
991		1052
992	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1053	hv = newHV ();
		1054	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1055	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1056
		1057	for (i = 1; i < items; i++)
		1058	av_push (coro->args, newSVsv (ST (i)));
		1059
993	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1060	/*coro->mainstack = 0; *//*actual work is done inside transfer */
994	/*coro->stack = 0;*/	1061	/*coro->stack = 0;*/
995		1062	}
996	/* same as JMPENV_BOOTSTRAP */
997	/* we might be able to recycle start_env, but safe is safe */
998	/*Zero(&coro->start_env, 1, JMPENV);*/
999	coro->start_env.je_ret = -1;
1000	coro->start_env.je_mustcatch = TRUE;
1001
1002	RETVAL = coro;
1003	OUTPUT:	1063	OUTPUT:
1004	RETVAL	1064	RETVAL
1005		1065
1006	void	1066	void
1007	transfer(prev, next, flags)	1067	_set_stacklevel (...)
1008	SV *prev	1068	ALIAS:
1009	SV *next	1069	Coro::State::transfer = 1
1010	int flags	1070	Coro::schedule = 2
1011	PROTOTYPE: @	1071	Coro::cede = 3
		1072	Coro::Cont::yield = 4
1012	CODE:	1073	CODE:
1013	PUTBACK;	1074	{
1014	SV_CORO (next, "Coro::transfer");	1075	struct transfer_args ta;
1015	SV_CORO (prev, "Coro::transfer");	1076
1016	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1077	switch (ix)
1017	SPAGAIN;	1078	{
		1079	case 0:
		1080	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1081	ta.next = 0;
		1082	ta.flags = TRANSFER_SET_STACKLEVEL;
		1083	break;
		1084
		1085	case 1:
		1086	if (items != 3)
		1087	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1088
		1089	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1090	break;
		1091
		1092	case 2:
		1093	prepare_schedule (&ta);
		1094	break;
		1095
		1096	case 3:
		1097	prepare_cede (&ta);
		1098	break;
		1099
		1100	case 4:
		1101	{
		1102	SV *yieldstack;
		1103	SV *sv;
		1104	AV *defav = GvAV (PL_defgv);
		1105
		1106	yieldstack = *hv_fetch (
		1107	(HV *)SvRV (GvSV (coro_current)),
		1108	"yieldstack", sizeof ("yieldstack") - 1,
		1109	0
		1110	);
		1111
		1112	/* set up @_ -- ugly */
		1113	av_clear (defav);
		1114	av_fill (defav, items - 1);
		1115	while (items--)
		1116	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1117
		1118	sv = av_pop ((AV *)SvRV (yieldstack));
		1119	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1120	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1121	ta.flags = 0;
		1122	SvREFCNT_dec (sv);
		1123	}
		1124	break;
		1125
		1126	}
		1127
		1128	TRANSFER (ta);
		1129	}
1018		1130
1019	void	1131	void
1020	DESTROY(coro)	1132	_clone_state_from (SV *dst, SV *src)
1021	Coro::State coro	1133	CODE:
1022	CODE:	1134	{
		1135	struct coro *coro_src = SvSTATE (src);
1023		1136
1024	if (coro->mainstack && coro->mainstack != main_mainstack)	1137	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1025	{
1026	struct coro temp;
1027		1138
1028	PUTBACK;	1139	++coro_src->refcnt;
1029	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1140	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1030	LOAD (aTHX_ coro);	1141	}
1031	SPAGAIN;
1032
1033	destroy_stacks (aTHX);
1034
1035	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1036	SPAGAIN;
1037
1038	coro->mainstack = 0;
1039	}
1040
1041	deallocate_stack (coro);
1042	SvREFCNT_dec (coro->args);
1043	Safefree (coro);
1044		1142
1045	void	1143	void
1046	_exit(code)	1144	_exit (code)
1047	int code	1145	int code
1048	PROTOTYPE: $	1146	PROTOTYPE: $
1049	CODE:	1147	CODE:
1050	_exit (code);	1148	_exit (code);
1051		1149
1052	MODULE = Coro::State PACKAGE = Coro::Cont
1053
1054	# this is slightly dirty (should expose a c-level api)
1055
1056	void
1057	yield(...)
1058	PROTOTYPE: @
1059	CODE:
1060	SV *yieldstack;
1061	SV *sv;
1062	AV *defav = GvAV (PL_defgv);
1063	struct coro *prev, *next;
1064
1065	yieldstack = *hv_fetch (
1066	(HV *)SvRV (GvSV (coro_current)),
1067	"yieldstack", sizeof ("yieldstack") - 1,
1068	0
1069	);
1070
1071	/* set up @_ -- ugly */
1072	av_clear (defav);
1073	av_fill (defav, items - 1);
1074	while (items--)
1075	av_store (defav, items, SvREFCNT_inc (ST(items)));
1076
1077	sv = av_pop ((AV *)SvRV (yieldstack));
1078	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1079	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1080	SvREFCNT_dec (sv);
1081
1082	transfer (aTHX_ prev, next, 0);
1083
1084	MODULE = Coro::State PACKAGE = Coro	1150	MODULE = Coro::State PACKAGE = Coro
1085		1151
1086	# this is slightly dirty (should expose a c-level api)
1087
1088	BOOT:	1152	BOOT:
1089	{	1153	{
1090	int i;	1154	int i;
		1155
1091	HV *stash = gv_stashpv ("Coro", TRUE);	1156	coro_stash = gv_stashpv ("Coro", TRUE);
1092		1157
1093	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1158	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1094	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1159	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1095	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1160	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1096	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1161	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1097	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1162	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1098	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1163	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1099		1164
1100	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1165	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1101	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1166	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1102		1167
1103	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1168	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1111	coroapi.ready = api_ready;	1176	coroapi.ready = api_ready;
1112	coroapi.nready = &coro_nready;	1177	coroapi.nready = &coro_nready;
1113	coroapi.current = coro_current;	1178	coroapi.current = coro_current;
1114		1179
1115	GCoroAPI = &coroapi;	1180	GCoroAPI = &coroapi;
1116	sv_setiv(sv, (IV)&coroapi);	1181	sv_setiv (sv, (IV)&coroapi);
1117	SvREADONLY_on(sv);	1182	SvREADONLY_on (sv);
1118	}	1183	}
1119	}	1184	}
1120		1185
1121	#if !PERL_MICRO	1186	int
		1187	prio (Coro::State coro, int newprio = 0)
		1188	ALIAS:
		1189	nice = 1
		1190	CODE:
		1191	{
		1192	RETVAL = coro->prio;
		1193
		1194	if (items > 1)
		1195	{
		1196	if (ix)
		1197	newprio += coro->prio;
		1198
		1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1201
		1202	coro->prio = newprio;
		1203	}
		1204	}
1122		1205
1123	void	1206	void
1124	ready(self)	1207	ready (SV *self)
1125	SV * self
1126	PROTOTYPE: $	1208	PROTOTYPE: $
1127	CODE:	1209	CODE:
1128	api_ready (self);	1210	api_ready (self);
1129		1211
1130	#endif
1131
1132	int	1212	int
1133	nready(...)	1213	nready (...)
1134	PROTOTYPE:	1214	PROTOTYPE:
1135	CODE:	1215	CODE:
1136	RETVAL = coro_nready;	1216	RETVAL = coro_nready;
1137	OUTPUT:	1217	OUTPUT:
1138	RETVAL	1218	RETVAL
1139		1219
1140	void	1220	MODULE = Coro::State PACKAGE = Coro::AIO
1141	schedule(...)
1142	PROTOTYPE:
1143	CODE:
1144	api_schedule ();
1145		1221
1146	void
1147	cede(...)
1148	PROTOTYPE:
1149	CODE:
1150	api_cede ();
1151
1152	# and these are hacks
1153	SV *	1222	SV *
1154	_aio_get_state ()	1223	_get_state ()
1155	CODE:	1224	CODE:
1156	{	1225	{
1157	struct {	1226	struct {
1158	int errorno;	1227	int errorno;
1159	int laststype;	1228	int laststype;
…		…
1170	}	1239	}
1171	OUTPUT:	1240	OUTPUT:
1172	RETVAL	1241	RETVAL
1173		1242
1174	void	1243	void
1175	_aio_set_state (char *data_)	1244	_set_state (char *data_)
1176	PROTOTYPE: $	1245	PROTOTYPE: $
1177	CODE:	1246	CODE:
1178	{	1247	{
1179	struct {	1248	struct {
1180	int errorno;	1249	int errorno;

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