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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.76 by root, Thu Oct 26 08:45:56 2006 UTC vs.
Revision 1.103 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
		36	#include <stdio.h>
32	#include <errno.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)
…		…
66	# define UNLOCK (void)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;
…		…
130	OP **retstack;	157	OP **retstack;
131	I32 retstack_ix;	158	I32 retstack_ix;
132	I32 retstack_max;	159	I32 retstack_max;
133	PMOP *curpm;	160	PMOP *curpm;
134	COP *curcop;	161	COP *curcop;
135	JMPENV *top_env;
136		162
137	/* data associated with this coroutine (initial args) */	163	/* coro process data */
138	AV *args;	164	int prio;
139	};	165	};
140		166
141	typedef struct coro *Coro__State;	167	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	168	typedef struct coro *Coro__State_or_hashref;
143		169
144	/* mostly copied from op.c:cv_clone2 */	170	static AV *
145	STATIC AV *	171	coro_clone_padlist (CV *cv)
146	clone_padlist (pTHX_ AV *protopadlist)
147	{	172	{
148	AV *av;	173	AV *padlist = CvPADLIST (cv);
149	I32 ix;
150	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
151	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
152	SV **pname = AvARRAY (protopad_name);
153	SV **ppad = AvARRAY (protopad);
154	I32 fname = AvFILLp (protopad_name);
155	I32 fpad = AvFILLp (protopad);
156	AV *newpadlist, *newpad_name, *newpad;	174	AV *newpadlist, *newpad;
157	SV **npad;
158
159	newpad_name = newAV ();
160	for (ix = fname; ix >= 0; ix--)
161	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163	newpad = newAV ();
164	av_fill (newpad, AvFILLp (protopad));
165	npad = AvARRAY (newpad);
166		175
167	newpadlist = newAV ();	176	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	177	AvREAL_off (newpadlist);
169	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)));
170	av_store (newpadlist, 1, (SV *) newpad);	187	av_store (newpadlist, 1, (SV *)newpad);
171
172	av = newAV (); /* will be @_ */
173	av_extend (av, 0);
174	av_store (newpad, 0, (SV *) av);
175	AvREIFY_on (av);
176
177	for (ix = fpad; ix > 0; ix--)
178	{
179	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
180
181	if (namesv && namesv != &PL_sv_undef)
182	{
183	char *name = SvPVX (namesv); /* XXX */
184
185	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
186	{ /* lexical from outside? */
187	npad[ix] = SvREFCNT_inc (ppad[ix]);
188	}
189	else
190	{ /* our own lexical */
191	SV *sv;
192	if (*name == '&')
193	sv = SvREFCNT_inc (ppad[ix]);
194	else if (*name == '@')
195	sv = (SV *) newAV ();
196	else if (*name == '%')
197	sv = (SV *) newHV ();
198	else
199	sv = NEWSV (0, 0);
200
201	#ifdef SvPADBUSY
202	if (!SvPADBUSY (sv))
203	#endif
204	SvPADMY_on (sv);
205
206	npad[ix] = sv;
207	}
208	}
209	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210	{
211	npad[ix] = SvREFCNT_inc (ppad[ix]);
212	}
213	else
214	{
215	SV *sv = NEWSV (0, 0);
216	SvPADTMP_on (sv);
217	npad[ix] = sv;
218	}
219	}
220
221	#if 0 /* return -ENOTUNDERSTOOD */
222	/* Now that vars are all in place, clone nested closures. */
223
224	for (ix = fpad; ix > 0; ix--) {
225	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226	if (namesv
227	&& namesv != &PL_sv_undef
228	&& !(SvFLAGS(namesv) & SVf_FAKE)
229	&& *SvPVX(namesv) == '&'
230	&& CvCLONE(ppad[ix]))
231	{
232	CV *kid = cv_clone((CV*)ppad[ix]);
233	SvREFCNT_dec(ppad[ix]);
234	CvCLONE_on(kid);
235	SvPADMY_on(kid);
236	npad[ix] = (SV*)kid;
237	}
238	}
239	#endif
240		188
241	return newpadlist;	189	return newpadlist;
242	}	190	}
243		191
244	STATIC void	192	static void
245	free_padlist (pTHX_ AV *padlist)	193	free_padlist (AV *padlist)
246	{	194	{
247	/* may be during global destruction */	195	/* may be during global destruction */
248	if (SvREFCNT (padlist))	196	if (SvREFCNT (padlist))
249	{	197	{
250	I32 i = AvFILLp (padlist);	198	I32 i = AvFILLp (padlist);
…		…
263		211
264	SvREFCNT_dec ((SV*)padlist);	212	SvREFCNT_dec ((SV*)padlist);
265	}	213	}
266	}	214	}
267		215
268	STATIC int	216	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	217	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	218	{
271	AV *padlist;	219	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	220	AV *av = (AV *)mg->mg_obj;
273		221
274	/* casting is fun. */	222	/* casting is fun. */
275	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276	free_padlist (aTHX_ padlist);	224	free_padlist (padlist);
277		225
278	SvREFCNT_dec (av);	226	SvREFCNT_dec (av);
279		227
280	return 0;	228	return 0;
281	}	229	}
…		…
283	#define PERL_MAGIC_coro PERL_MAGIC_ext	231	#define PERL_MAGIC_coro PERL_MAGIC_ext
284		232
285	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
286		234
287	/* the next two functions merely cache the padlists */	235	/* the next two functions merely cache the padlists */
288	STATIC void	236	static void
289	get_padlist (pTHX_ CV *cv)	237	get_padlist (CV *cv)
290	{	238	{
291	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
292		240
293	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
294	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
295	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
296	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
297	}	255	}
298		256
299	STATIC void	257	static void
300	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
301	{	259	{
302	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
303		261
304	if (!mg)	262	if (!mg)
305	{	263	{
…		…
313	}	271	}
314		272
315	#define SB do {	273	#define SB do {
316	#define SE } while (0)	274	#define SE } while (0)
317		275
318	#define LOAD(state) load_state(aTHX_ (state));	276	#define LOAD(state) load_state((state));
319	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	277	#define SAVE(state,flags) save_state((state),(flags));
320		278
321	#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
322		280
323	static void	281	static void
324	load_state(pTHX_ Coro__State c)	282	load_state(Coro__State c)
325	{	283	{
326	PL_dowarn = c->dowarn;	284	PL_dowarn = c->dowarn;
327	PL_in_eval = c->in_eval;	285	PL_in_eval = c->in_eval;
328		286
329	PL_curstackinfo = c->curstackinfo;	287	PL_curstackinfo = c->curstackinfo;
…		…
347	PL_scopestack_ix = c->scopestack_ix;	305	PL_scopestack_ix = c->scopestack_ix;
348	PL_scopestack_max = c->scopestack_max;	306	PL_scopestack_max = c->scopestack_max;
349	PL_savestack = c->savestack;	307	PL_savestack = c->savestack;
350	PL_savestack_ix = c->savestack_ix;	308	PL_savestack_ix = c->savestack_ix;
351	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
352	#if PERL_VERSION < 9	310	#if !PERL_VERSION_ATLEAST (5,9,0)
353	PL_retstack = c->retstack;	311	PL_retstack = c->retstack;
354	PL_retstack_ix = c->retstack_ix;	312	PL_retstack_ix = c->retstack_ix;
355	PL_retstack_max = c->retstack_max;	313	PL_retstack_max = c->retstack_max;
356	#endif	314	#endif
357	PL_curpm = c->curpm;	315	PL_curpm = c->curpm;
358	PL_curcop = c->curcop;	316	PL_curcop = c->curcop;
359	PL_top_env = c->top_env;
360		317
361	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
362	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
363	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
364		321
…		…
371	{	328	{
372	AV *padlist = (AV *)POPs;	329	AV *padlist = (AV *)POPs;
373		330
374	if (padlist)	331	if (padlist)
375	{	332	{
376	put_padlist (aTHX_ cv); /* mark this padlist as available */	333	put_padlist (cv); /* mark this padlist as available */
377	CvPADLIST(cv) = padlist;	334	CvPADLIST(cv) = padlist;
378	}	335	}
379		336
380	++CvDEPTH(cv);	337	++CvDEPTH(cv);
381	}	338	}
…		…
383	PUTBACK;	340	PUTBACK;
384	}	341	}
385	}	342	}
386		343
387	static void	344	static void
388	save_state(pTHX_ Coro__State c, int flags)	345	save_state(Coro__State c, int flags)
389	{	346	{
390	{	347	{
391	dSP;	348	dSP;
392	I32 cxix = cxstack_ix;	349	I32 cxix = cxstack_ix;
393	PERL_CONTEXT *ccstk = cxstack;	350	PERL_CONTEXT *ccstk = cxstack;
…		…
421	}	378	}
422		379
423	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST(cv));
424	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
425		382
426	get_padlist (aTHX_ cv); /* this is a monster */	383	get_padlist (cv);
427	}	384	}
428	}	385	}
429	#ifdef CXt_FORMAT	386	#ifdef CXt_FORMAT
430	else if (CxTYPE(cx) == CXt_FORMAT)	387	else if (CxTYPE(cx) == CXt_FORMAT)
431	{	388	{
…		…
475	c->scopestack_ix = PL_scopestack_ix;	432	c->scopestack_ix = PL_scopestack_ix;
476	c->scopestack_max = PL_scopestack_max;	433	c->scopestack_max = PL_scopestack_max;
477	c->savestack = PL_savestack;	434	c->savestack = PL_savestack;
478	c->savestack_ix = PL_savestack_ix;	435	c->savestack_ix = PL_savestack_ix;
479	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
480	#if PERL_VERSION < 9	437	#if !PERL_VERSION_ATLEAST (5,9,0)
481	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
482	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
483	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
484	#endif	441	#endif
485	c->curpm = PL_curpm;	442	c->curpm = PL_curpm;
486	c->curcop = PL_curcop;	443	c->curcop = PL_curcop;
487	c->top_env = PL_top_env;
488	}	444	}
489		445
490	/*	446	/*
491	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
492	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
493	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
494	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
495	*/	451	*/
496	STATIC void	452	static void
497	coro_init_stacks (pTHX)	453	coro_init_stacks ()
498	{	454	{
499	LOCK;
500
501	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
502	PL_curstackinfo->si_type = PERLSI_MAIN;	456	PL_curstackinfo->si_type = PERLSI_MAIN;
503	PL_curstack = PL_curstackinfo->si_stack;	457	PL_curstack = PL_curstackinfo->si_stack;
504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505		459
…		…
526		480
527	New(54,PL_savestack,96,ANY);	481	New(54,PL_savestack,96,ANY);
528	PL_savestack_ix = 0;	482	PL_savestack_ix = 0;
529	PL_savestack_max = 96;	483	PL_savestack_max = 96;
530		484
531	#if PERL_VERSION < 9	485	#if !PERL_VERSION_ATLEAST (5,9,0)
532	New(54,PL_retstack,8,OP*);	486	New(54,PL_retstack,8,OP*);
533	PL_retstack_ix = 0;	487	PL_retstack_ix = 0;
534	PL_retstack_max = 8;	488	PL_retstack_max = 8;
535	#endif	489	#endif
536
537	UNLOCK;
538	}	490	}
539		491
540	/*	492	/*
541	* destroy the stacks, the callchain etc...	493	* destroy the stacks, the callchain etc...
542	*/	494	*/
543	STATIC void	495	static void
544	destroy_stacks(pTHX)	496	coro_destroy_stacks()
545	{	497	{
546	if (!IN_DESTRUCT)	498	if (!IN_DESTRUCT)
547	{	499	{
548	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
549	LEAVE_SCOPE (0);	501	LEAVE_SCOPE (0);
…		…
580		532
581	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
582	Safefree (PL_markstack);	534	Safefree (PL_markstack);
583	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
584	Safefree (PL_savestack);	536	Safefree (PL_savestack);
585	#if PERL_VERSION < 9	537	#if !PERL_VERSION_ATLEAST (5,9,0)
586	Safefree (PL_retstack);	538	Safefree (PL_retstack);
587	#endif	539	#endif
588	}	540	}
589		541
590	static void	542	static void
591	allocate_stack (Coro__State ctx, int alloc)	543	setup_coro (struct coro *coro)
592	{
593	coro_stack *stack;
594
595	New (0, stack, 1, coro_stack);
596
597	stack->refcnt = 1;
598	stack->usecnt = 1;
599	stack->gencnt = ctx->gencnt = 0;
600
601	if (alloc)
602	{
603	#if HAVE_MMAP
604	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
605	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
606	if (stack->sptr == (void *)-1)
607	#endif
608	{
609	stack->ssize = - (STACKSIZE * (long)sizeof (long));
610	New (0, stack->sptr, STACKSIZE, long);
611	}
612	}
613	else
614	stack->sptr = 0;
615
616	ctx->stack = stack;
617	}
618
619	static void
620	deallocate_stack (Coro__State ctx)
621	{
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{
628	if (!--stack->refcnt)
629	{
630	#ifdef HAVE_MMAP
631	if (stack->ssize > 0 && stack->sptr)
632	munmap (stack->sptr, stack->ssize);
633	else
634	#endif
635	Safefree (stack->sptr);
636
637	Safefree (stack);
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}
643
644	static void
645	setup_coro (void *arg)
646	{	544	{
647	/*	545	/*
648	* emulate part of the perl startup here.	546	* emulate part of the perl startup here.
649	*/	547	*/
650	dTHX;
651	dSP;
652	Coro__State ctx = (Coro__State)arg;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654		548
655	coro_init_stacks (aTHX);	549	coro_init_stacks ();
		550
656	/*PL_curcop = 0;*/	551	PL_curcop = 0;
657	/*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
658	SvREFCNT_dec (GvAV (PL_defgv));	562	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	563	GvAV (PL_defgv) = coro->args; coro->args = 0;
660		564
661	SPAGAIN;
662
663	if (ctx->stack)
664	{
665	ctx->cursp = 0;
666
667	PUSHMARK(SP);
668	PUTBACK;
669	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671	if (SvTRUE (ERRSV))
672	croak (NULL);
673	else
674	croak ("FATAL: CCTXT coroutine returned!");
675	}
676	else
677	{
678	UNOP myop;
679
680	PL_op = (OP *)&myop;
681
682	Zero(&myop, 1, UNOP);	565	Zero (&myop, 1, LOGOP);
683	myop.op_next = Nullop;	566	myop.op_next = Nullop;
684	myop.op_flags = OPf_WANT_VOID;	567	myop.op_flags = OPf_WANT_VOID;
685		568
		569	PL_op = (OP *)&myop;
		570
686	PUSHMARK(SP);	571	PUSHMARK (SP);
687	XPUSHs (sub_init);	572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
688	/*
689	* the next line is slightly wrong, as PL_op->op_next
690	* is actually being executed so we skip the first op.
691	* that doesn't matter, though, since it is only
692	* pp_nextstate and we never return...
693	* ah yes, and I don't care anyways ;)
694	*/
695	PUTBACK;	573	PUTBACK;
696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697	SPAGAIN;	575	SPAGAIN;
698		576
699	ENTER; /* necessary e.g. for dounwind */	577	ENTER; /* necessary e.g. for dounwind */
700	}	578	}
701	}	579	}
702		580
703	static void	581	static void
704	continue_coro (void *arg)	582	free_coro_mortal ()
705	{	583	{
706	/*
707	* this is a _very_ stripped down perl interpreter ;)
708	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711
712	PL_top_env = &ctx->start_env;
713
714	ctx->cursp = 0;
715	PL_op = PL_op->op_next;
716	CALLRUNOPS(aTHX);
717
718	abort ();
719	}
720
721	STATIC void
722	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
723	{
724	dSTACKLEVEL;
725
726	if (prev != next)
727	{
728	if (next->mainstack)
729	{
730	LOCK;
731	SAVE (prev, flags);
732	LOAD (next);
733	UNLOCK;
734
735	/* mark this state as in-use */
736	next->mainstack = 0;
737	next->tmps_ix = -2;
738
739	/* stacklevel changed? if yes, grab the stack for us! */
740	if (flags & TRANSFER_SAVE_CCTXT)
741	{
742	if (!prev->stack)
743	allocate_stack (prev, 0);
744	else if (prev->cursp != stacklevel
745	&& prev->stack->usecnt > 1)
746	{
747	prev->gencnt = ++prev->stack->gencnt;
748	prev->stack->usecnt = 1;
749	}
750
751	/* has our stack been invalidated? */
752	if (next->stack && next->stack->gencnt != next->gencnt)
753	{
754	deallocate_stack (next);
755	allocate_stack (next, 1);
756	coro_create (&(next->stack->cctx),
757	continue_coro, (void *)next,
758	next->stack->sptr, labs (next->stack->ssize));
759	}
760
761	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
762	prev->cursp = stacklevel;
763	/* don't add any code here */
764	}
765	else
766	next->cursp = stacklevel;
767	}
768	else if (next->tmps_ix == -2)
769	croak ("tried to transfer to running coroutine");
770	else
771	{
772	LOCK;
773	SAVE (prev, -1); /* first get rid of the old state */
774	UNLOCK;
775
776	if (flags & TRANSFER_SAVE_CCTXT)
777	{
778	if (!prev->stack)
779	allocate_stack (prev, 0);
780
781	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
782	{
783	PL_top_env = &next->start_env;
784
785	setup_coro (next);
786	next->cursp = stacklevel;
787
788	prev->stack->refcnt++;
789	prev->stack->usecnt++;
790	next->stack = prev->stack;
791	next->gencnt = prev->gencnt;
792	}
793	else
794	{
795	assert (!next->stack);
796	allocate_stack (next, 1);
797	coro_create (&(next->stack->cctx),
798	setup_coro, (void *)next,
799	next->stack->sptr, labs (next->stack->ssize));
800	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
801	prev->cursp = stacklevel;
802	/* don't add any code here */
803	}
804	}
805	else
806	{
807	setup_coro (next);
808	next->cursp = stacklevel;
809	}
810	}
811	}
812
813	LOCK;
814	if (coro_mortal)	584	if (coro_mortal)
815	{	585	{
816	SvREFCNT_dec (coro_mortal);	586	SvREFCNT_dec (coro_mortal);
817	coro_mortal = 0;	587	coro_mortal = 0;
818	}	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() */
819	UNLOCK;	614	UNLOCK;
820	}
821		615
822	#define SV_CORO(sv,func) \	616	/*
823	do { \	617	* this is a _very_ stripped down perl interpreter ;)
824	if (SvROK (sv)) \	618	*/
825	sv = SvRV (sv); \	619	PL_top_env = &PL_start_env;
826	\	620	/* inject call to cctx_init */
827	if (SvTYPE (sv) == SVt_PVHV) \	621	prepare_cctx ((coro_stack *)arg);
828	{ \
829	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
830	\
831	if (!he) \
832	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
833	\
834	(sv) = SvRV (HeVAL(he)); \
835	} \
836	\
837	/* must also be changed inside Coro::Cont::yield */ \
838	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
839	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
840	\
841	} while(0)
842		622
843	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	623	/* somebody will hit me for both perl_run and PL_restartop */
		624	perl_run (PL_curinterp);
844		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
845	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
846	api_transfer(pTHX_ SV *prev, SV *next, int flags)	875	api_transfer (SV *prev, SV *next, int flags)
847	{	876	{
848	SV_CORO (prev, "Coro::transfer");	877	dTHX;
849	SV_CORO (next, "Coro::transfer");	878	struct transfer_args ta;
850		879
851	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	880	prepare_transfer (&ta, prev, next, flags);
		881	TRANSFER (ta);
852	}	882	}
853		883
854	/** Coro ********************************************************************/	884	/** Coro ********************************************************************/
855		885
856	#define PRIO_MAX 3	886	#define PRIO_MAX 3
…		…
860	#define PRIO_IDLE -3	890	#define PRIO_IDLE -3
861	#define PRIO_MIN -4	891	#define PRIO_MIN -4
862		892
863	/* for Coro.pm */	893	/* for Coro.pm */
864	static GV *coro_current, *coro_idle;	894	static GV *coro_current, *coro_idle;
865	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
866	static int coro_nready;	896	static int coro_nready;
867		897
868	static void	898	static void
869	coro_enq (pTHX_ SV *sv)	899	coro_enq (SV *sv)
870	{	900	{
871	SV **xprio;
872	int prio;	901	int prio;
873		902
874	if (SvTYPE (sv) != SVt_PVHV)	903	if (SvTYPE (sv) != SVt_PVHV)
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");
876		905
877	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	906	prio = SvSTATE (sv)->prio;
878	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
879
880	prio = prio > PRIO_MAX ? PRIO_MAX
881	: prio < PRIO_MIN ? PRIO_MIN
882	: prio;
883		907
884	av_push (coro_ready [prio - PRIO_MIN], sv);	908	av_push (coro_ready [prio - PRIO_MIN], sv);
885	coro_nready++;	909	coro_nready++;
886	}	910	}
887		911
888	static SV *	912	static SV *
889	coro_deq (pTHX_ int min_prio)	913	coro_deq (int min_prio)
890	{	914	{
891	int prio = PRIO_MAX - PRIO_MIN;	915	int prio = PRIO_MAX - PRIO_MIN;
892		916
893	min_prio -= PRIO_MIN;	917	min_prio -= PRIO_MIN;
894	if (min_prio < 0)	918	if (min_prio < 0)
895	min_prio = 0;	919	min_prio = 0;
896		920
897	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
898	if (av_len (coro_ready[prio]) >= 0)	922	if (AvFILLp (coro_ready [prio]) >= 0)
899	{	923	{
900	coro_nready--;	924	coro_nready--;
901	return av_shift (coro_ready[prio]);	925	return av_shift (coro_ready [prio]);
902	}	926	}
903		927
904	return 0;	928	return 0;
905	}	929	}
906		930
…		…
911		935
912	if (SvROK (coro))	936	if (SvROK (coro))
913	coro = SvRV (coro);	937	coro = SvRV (coro);
914		938
915	LOCK;	939	LOCK;
916	coro_enq (aTHX_ SvREFCNT_inc (coro));	940	coro_enq (SvREFCNT_inc (coro));
917	UNLOCK;	941	UNLOCK;
918	}	942	}
919		943
920	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
921	api_schedule (void)	1000	api_schedule (void)
922	{	1001	{
923	dTHX;	1002	dTHX;
		1003	struct transfer_args ta;
924		1004
925	SV *prev, *next;	1005	prepare_schedule (&ta);
926		1006	TRANSFER (ta);
927	LOCK;
928
929	prev = SvRV (GvSV (coro_current));
930	next = coro_deq (aTHX_ PRIO_MIN);
931
932	if (!next)
933	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
934
935	/* free this only after the transfer */
936	coro_mortal = prev;
937	SV_CORO (prev, "Coro::schedule");
938
939	SvRV (GvSV (coro_current)) = next;
940
941	SV_CORO (next, "Coro::schedule");
942
943	UNLOCK;
944
945	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
946	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
947	}	1007	}
948		1008
949	static void	1009	static void
950	api_cede (void)	1010	api_cede (void)
951	{	1011	{
952	dTHX;	1012	dTHX;
		1013	struct transfer_args ta;
953		1014
954	LOCK;	1015	prepare_cede (&ta);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1016	TRANSFER (ta);
956	UNLOCK;
957
958	api_schedule ();
959	}	1017	}
960		1018
961	MODULE = Coro::State PACKAGE = Coro::State	1019	MODULE = Coro::State PACKAGE = Coro::State
962		1020
963	PROTOTYPES: ENABLE	1021	PROTOTYPES: DISABLE
964		1022
965	BOOT:	1023	BOOT:
966	{ /* {} necessary for stoopid perl-5.6.x */	1024	{
967	#ifdef USE_ITHREADS	1025	#ifdef USE_ITHREADS
968	MUTEX_INIT (&coro_mutex);	1026	MUTEX_INIT (&coro_mutex);
969	#endif	1027	#endif
		1028	BOOT_PAGESIZE;
970		1029
971	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
972	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
973	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
974		1031
975	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
976	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
977	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
978	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
979		1035
980	main_mainstack = PL_mainstack;	1036	main_mainstack = PL_mainstack;
981		1037
982	coroapi.ver = CORO_API_VERSION;	1038	coroapi.ver = CORO_API_VERSION;
983	coroapi.transfer = api_transfer;	1039	coroapi.transfer = api_transfer;
984	}
985		1040
986	Coro::State	1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
987	_newprocess(args)	1042	}
988	SV * args	1043
989	PROTOTYPE: $	1044	SV *
		1045	new (char *klass, ...)
990	CODE:	1046	CODE:
991	Coro__State coro;	1047	{
		1048	struct coro *coro;
		1049	HV *hv;
		1050	int i;
992		1051
993	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
994	croak ("Coro::State::_newprocess expects an arrayref");
995
996	Newz (0, coro, 1, struct coro);	1052	Newz (0, coro, 1, struct coro);
		1053	coro->args = newAV ();
997		1054
998	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
999	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1000	/*coro->stack = 0;*/	1063	/*coro->stack = 0;*/
1001		1064	}
1002	/* same as JMPENV_BOOTSTRAP */
1003	/* we might be able to recycle start_env, but safe is safe */
1004	/*Zero(&coro->start_env, 1, JMPENV);*/
1005	coro->start_env.je_ret = -1;
1006	coro->start_env.je_mustcatch = TRUE;
1007
1008	RETVAL = coro;
1009	OUTPUT:	1065	OUTPUT:
1010	RETVAL	1066	RETVAL
1011		1067
1012	void	1068	void
1013	transfer(prev, next, flags)	1069	_set_stacklevel (...)
1014	SV *prev	1070	ALIAS:
1015	SV *next	1071	Coro::State::transfer = 1
1016	int flags	1072	Coro::schedule = 2
1017	PROTOTYPE: @	1073	Coro::cede = 3
		1074	Coro::Cont::yield = 4
1018	CODE:	1075	CODE:
1019	PUTBACK;	1076	{
1020	SV_CORO (next, "Coro::transfer");	1077	struct transfer_args ta;
1021	SV_CORO (prev, "Coro::transfer");	1078
1022	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1079	switch (ix)
1023	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	}
1024		1132
1025	void	1133	void
1026	DESTROY(coro)	1134	_clone_state_from (SV *dst, SV *src)
1027	Coro::State coro	1135	CODE:
1028	CODE:	1136	{
		1137	struct coro *coro_src = SvSTATE (src);
1029		1138
1030	if (coro->mainstack && coro->mainstack != main_mainstack)	1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1031	{
1032	struct coro temp;
1033		1140
1034	PUTBACK;	1141	++coro_src->refcnt;
1035	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;
1036	LOAD (aTHX_ coro);	1143	}
1037	SPAGAIN;
1038
1039	destroy_stacks (aTHX);
1040
1041	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1042	SPAGAIN;
1043
1044	coro->mainstack = 0;
1045	}
1046
1047	deallocate_stack (coro);
1048	SvREFCNT_dec (coro->args);
1049	Safefree (coro);
1050		1144
1051	void	1145	void
1052	_exit(code)	1146	_exit (code)
1053	int code	1147	int code
1054	PROTOTYPE: $	1148	PROTOTYPE: $
1055	CODE:	1149	CODE:
1056	_exit (code);	1150	_exit (code);
1057		1151
1058	MODULE = Coro::State PACKAGE = Coro::Cont
1059
1060	# this is slightly dirty (should expose a c-level api)
1061
1062	void
1063	yield(...)
1064	PROTOTYPE: @
1065	CODE:
1066	SV *yieldstack;
1067	SV *sv;
1068	AV *defav = GvAV (PL_defgv);
1069	struct coro *prev, *next;
1070
1071	yieldstack = *hv_fetch (
1072	(HV *)SvRV (GvSV (coro_current)),
1073	"yieldstack", sizeof ("yieldstack") - 1,
1074	0
1075	);
1076
1077	/* set up @_ -- ugly */
1078	av_clear (defav);
1079	av_fill (defav, items - 1);
1080	while (items--)
1081	av_store (defav, items, SvREFCNT_inc (ST(items)));
1082
1083	sv = av_pop ((AV *)SvRV (yieldstack));
1084	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1085	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1086	SvREFCNT_dec (sv);
1087
1088	transfer (aTHX_ prev, next, 0);
1089
1090	MODULE = Coro::State PACKAGE = Coro	1152	MODULE = Coro::State PACKAGE = Coro
1091		1153
1092	# this is slightly dirty (should expose a c-level api)
1093
1094	BOOT:	1154	BOOT:
1095	{	1155	{
1096	int i;	1156	int i;
		1157
1097	HV *stash = gv_stashpv ("Coro", TRUE);	1158	coro_stash = gv_stashpv ("Coro", TRUE);
1098		1159
1099	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1160	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1100	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1161	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1101	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1102	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1103	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1104	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1105		1166
1106	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1107	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1108		1169
1109	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1117	coroapi.ready = api_ready;	1178	coroapi.ready = api_ready;
1118	coroapi.nready = &coro_nready;	1179	coroapi.nready = &coro_nready;
1119	coroapi.current = coro_current;	1180	coroapi.current = coro_current;
1120		1181
1121	GCoroAPI = &coroapi;	1182	GCoroAPI = &coroapi;
1122	sv_setiv(sv, (IV)&coroapi);	1183	sv_setiv (sv, (IV)&coroapi);
1123	SvREADONLY_on(sv);	1184	SvREADONLY_on (sv);
1124	}	1185	}
1125	}	1186	}
1126		1187
1127	#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	}
1128		1207
1129	void	1208	void
1130	ready(self)	1209	ready (SV *self)
1131	SV * self
1132	PROTOTYPE: $	1210	PROTOTYPE: $
1133	CODE:	1211	CODE:
1134	api_ready (self);	1212	api_ready (self);
1135		1213
1136	#endif
1137
1138	int	1214	int
1139	nready(...)	1215	nready (...)
1140	PROTOTYPE:	1216	PROTOTYPE:
1141	CODE:	1217	CODE:
1142	RETVAL = coro_nready;	1218	RETVAL = coro_nready;
1143	OUTPUT:	1219	OUTPUT:
1144	RETVAL	1220	RETVAL
1145		1221
1146	void	1222	MODULE = Coro::State PACKAGE = Coro::AIO
1147	schedule(...)
1148	PROTOTYPE:
1149	CODE:
1150	api_schedule ();
1151		1223
1152	void
1153	cede(...)
1154	PROTOTYPE:
1155	CODE:
1156	api_cede ();
1157
1158	# and these are hacks
1159	SV *	1224	SV *
1160	_aio_get_state ()	1225	_get_state ()
1161	CODE:	1226	CODE:
1162	{	1227	{
1163	struct {	1228	struct {
1164	int errorno;	1229	int errorno;
1165	int laststype;	1230	int laststype;
…		…
1176	}	1241	}
1177	OUTPUT:	1242	OUTPUT:
1178	RETVAL	1243	RETVAL
1179		1244
1180	void	1245	void
1181	_aio_set_state (char *data_)	1246	_set_state (char *data_)
1182	PROTOTYPE: $	1247	PROTOTYPE: $
1183	CODE:	1248	CODE:
1184	{	1249	{
1185	struct {	1250	struct {
1186	int errorno;	1251	int errorno;

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