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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.71 by root, Wed Jan 25 21:43:58 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>
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	AvREIFY_on (av);
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char *name = SvPVX (namesv); /* XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV *kid = cv_clone((CV*)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		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;
351	#ifdef PL_retstack	310	#if !PERL_VERSION_ATLEAST (5,9,0)
352	PL_retstack = c->retstack;	311	PL_retstack = c->retstack;
353	PL_retstack_ix = c->retstack_ix;	312	PL_retstack_ix = c->retstack_ix;
354	PL_retstack_max = c->retstack_max;	313	PL_retstack_max = c->retstack_max;
355	#endif	314	#endif
356	PL_curpm = c->curpm;	315	PL_curpm = c->curpm;
357	PL_curcop = c->curcop;	316	PL_curcop = c->curcop;
358	PL_top_env = c->top_env;
359		317
360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
363		321
…		…
370	{	328	{
371	AV *padlist = (AV *)POPs;	329	AV *padlist = (AV *)POPs;
372		330
373	if (padlist)	331	if (padlist)
374	{	332	{
375	put_padlist (aTHX_ cv); /* mark this padlist as available */	333	put_padlist (cv); /* mark this padlist as available */
376	CvPADLIST(cv) = padlist;	334	CvPADLIST(cv) = padlist;
377	}	335	}
378		336
379	++CvDEPTH(cv);	337	++CvDEPTH(cv);
380	}	338	}
…		…
382	PUTBACK;	340	PUTBACK;
383	}	341	}
384	}	342	}
385		343
386	static void	344	static void
387	save_state(pTHX_ Coro__State c, int flags)	345	save_state(Coro__State c, int flags)
388	{	346	{
389	{	347	{
390	dSP;	348	dSP;
391	I32 cxix = cxstack_ix;	349	I32 cxix = cxstack_ix;
392	PERL_CONTEXT *ccstk = cxstack;	350	PERL_CONTEXT *ccstk = cxstack;
…		…
420	}	378	}
421		379
422	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST(cv));
423	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
424		382
425	get_padlist (aTHX_ cv); /* this is a monster */	383	get_padlist (cv);
426	}	384	}
427	}	385	}
428	#ifdef CXt_FORMAT	386	#ifdef CXt_FORMAT
429	else if (CxTYPE(cx) == CXt_FORMAT)	387	else if (CxTYPE(cx) == CXt_FORMAT)
430	{	388	{
…		…
474	c->scopestack_ix = PL_scopestack_ix;	432	c->scopestack_ix = PL_scopestack_ix;
475	c->scopestack_max = PL_scopestack_max;	433	c->scopestack_max = PL_scopestack_max;
476	c->savestack = PL_savestack;	434	c->savestack = PL_savestack;
477	c->savestack_ix = PL_savestack_ix;	435	c->savestack_ix = PL_savestack_ix;
478	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
479	#ifdef PL_retstack	437	#if !PERL_VERSION_ATLEAST (5,9,0)
480	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
483	#endif	441	#endif
484	c->curpm = PL_curpm;	442	c->curpm = PL_curpm;
485	c->curcop = PL_curcop;	443	c->curcop = PL_curcop;
486	c->top_env = PL_top_env;
487	}	444	}
488		445
489	/*	446	/*
490	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
491	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
492	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
493	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
494	*/	451	*/
495	STATIC void	452	static void
496	coro_init_stacks (pTHX)	453	coro_init_stacks ()
497	{	454	{
498	LOCK;
499
500	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501	PL_curstackinfo->si_type = PERLSI_MAIN;	456	PL_curstackinfo->si_type = PERLSI_MAIN;
502	PL_curstack = PL_curstackinfo->si_stack;	457	PL_curstack = PL_curstackinfo->si_stack;
503	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504		459
…		…
525		480
526	New(54,PL_savestack,96,ANY);	481	New(54,PL_savestack,96,ANY);
527	PL_savestack_ix = 0;	482	PL_savestack_ix = 0;
528	PL_savestack_max = 96;	483	PL_savestack_max = 96;
529		484
530	#ifdef PL_retstack	485	#if !PERL_VERSION_ATLEAST (5,9,0)
531	New(54,PL_retstack,8,OP*);	486	New(54,PL_retstack,8,OP*);
532	PL_retstack_ix = 0;	487	PL_retstack_ix = 0;
533	PL_retstack_max = 8;	488	PL_retstack_max = 8;
534	#endif	489	#endif
535
536	UNLOCK;
537	}	490	}
538		491
539	/*	492	/*
540	* destroy the stacks, the callchain etc...	493	* destroy the stacks, the callchain etc...
541	*/	494	*/
542	STATIC void	495	static void
543	destroy_stacks(pTHX)	496	coro_destroy_stacks()
544	{	497	{
545	if (!IN_DESTRUCT)	498	if (!IN_DESTRUCT)
546	{	499	{
547	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
548	LEAVE_SCOPE (0);	501	LEAVE_SCOPE (0);
…		…
579		532
580	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
581	Safefree (PL_markstack);	534	Safefree (PL_markstack);
582	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
583	Safefree (PL_savestack);	536	Safefree (PL_savestack);
584	#ifdef PL_retstack	537	#if !PERL_VERSION_ATLEAST (5,9,0)
585	Safefree (PL_retstack);	538	Safefree (PL_retstack);
586	#endif	539	#endif
587	}	540	}
588		541
589	static void	542	static void
590	allocate_stack (Coro__State ctx, int alloc)	543	setup_coro (struct coro *coro)
591	{
592	coro_stack *stack;
593
594	New (0, stack, 1, coro_stack);
595
596	stack->refcnt = 1;
597	stack->usecnt = 1;
598	stack->gencnt = ctx->gencnt = 0;
599
600	if (alloc)
601	{
602	#if HAVE_MMAP
603	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605	if (stack->sptr == (void *)-1)
606	#endif
607	{
608	/*FIXME*//*D*//* reasonable stack size! */
609	stack->ssize = - (STACKSIZE * sizeof (long));
610	New (0, stack->sptr, STACKSIZE, long);
611	}
612	}
613	else
614	stack->sptr = 0;
615
616	ctx->stack = stack;
617	}
618
619	static void
620	deallocate_stack (Coro__State ctx)
621	{
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{
628	if (!--stack->refcnt)
629	{
630	#ifdef HAVE_MMAP
631	if (stack->ssize > 0 && stack->sptr)
632	munmap (stack->sptr, stack->ssize);
633	else
634	#endif
635	Safefree (stack->sptr);
636
637	Safefree (stack);
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}
643
644	static void
645	setup_coro (void *arg)
646	{	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	JMPENV coro_start_env;
712
713	PL_top_env = &ctx->start_env;
714
715	ctx->cursp = 0;
716	PL_op = PL_op->op_next;
717	CALLRUNOPS(aTHX);
718
719	abort ();
720	}
721
722	STATIC void
723	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724	{
725	dSTACKLEVEL;
726
727	if (prev != next)
728	{
729	if (next->mainstack)
730	{
731	LOCK;
732	SAVE (prev, flags);
733	LOAD (next);
734	UNLOCK;
735
736	/* mark this state as in-use */
737	next->mainstack = 0;
738	next->tmps_ix = -2;
739
740	/* stacklevel changed? if yes, grab the stack for us! */
741	if (flags & TRANSFER_SAVE_CCTXT)
742	{
743	if (!prev->stack)
744	allocate_stack (prev, 0);
745	else if (prev->cursp != stacklevel
746	&& prev->stack->usecnt > 1)
747	{
748	prev->gencnt = ++prev->stack->gencnt;
749	prev->stack->usecnt = 1;
750	}
751
752	/* has our stack been invalidated? */
753	if (next->stack && next->stack->gencnt != next->gencnt)
754	{
755	deallocate_stack (next);
756	allocate_stack (next, 1);
757	coro_create (&(next->stack->cctx),
758	continue_coro, (void *)next,
759	next->stack->sptr, labs (next->stack->ssize));
760	}
761
762	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763	prev->cursp = stacklevel;
764	/* don't add any code here */
765	}
766	else
767	next->cursp = stacklevel;
768	}
769	else if (next->tmps_ix == -2)
770	croak ("tried to transfer to running coroutine");
771	else
772	{
773	LOCK;
774	SAVE (prev, -1); /* first get rid of the old state */
775	UNLOCK;
776
777	if (flags & TRANSFER_SAVE_CCTXT)
778	{
779	if (!prev->stack)
780	allocate_stack (prev, 0);
781
782	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783	{
784	PL_top_env = &next->start_env;
785
786	setup_coro (next);
787	next->cursp = stacklevel;
788
789	prev->stack->refcnt++;
790	prev->stack->usecnt++;
791	next->stack = prev->stack;
792	next->gencnt = prev->gencnt;
793	}
794	else
795	{
796	assert (!next->stack);
797	allocate_stack (next, 1);
798	coro_create (&(next->stack->cctx),
799	setup_coro, (void *)next,
800	next->stack->sptr, labs (next->stack->ssize));
801	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802	prev->cursp = stacklevel;
803	/* don't add any code here */
804	}
805	}
806	else
807	{
808	setup_coro (next);
809	next->cursp = stacklevel;
810	}
811	}
812	}
813
814	LOCK;
815	if (coro_mortal)	584	if (coro_mortal)
816	{	585	{
817	SvREFCNT_dec (coro_mortal);	586	SvREFCNT_dec (coro_mortal);
818	coro_mortal = 0;	587	coro_mortal = 0;
819	}	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() */
820	UNLOCK;	614	UNLOCK;
821	}
822		615
823	#define SV_CORO(sv,func) \	616	/*
824	do { \	617	* this is a _very_ stripped down perl interpreter ;)
825	if (SvROK (sv)) \	618	*/
826	sv = SvRV (sv); \	619	PL_top_env = &PL_start_env;
827	\	620	/* inject call to cctx_init */
828	if (SvTYPE (sv) == SVt_PVHV) \	621	prepare_cctx ((coro_stack *)arg);
829	{ \
830	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831	\
832	if (!he) \
833	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834	\
835	(sv) = SvRV (HeVAL(he)); \
836	} \
837	\
838	/* must also be changed inside Coro::Cont::yield */ \
839	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841	\
842	} while(0)
843		622
844	#define SvSTATE(sv) (struct coro *)SvIV (sv)	623	/* somebody will hit me for both perl_run and PL_restartop */
		624	perl_run (PL_curinterp);
845		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
846	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
847	api_transfer(pTHX_ SV *prev, SV *next, int flags)	875	api_transfer (SV *prev, SV *next, int flags)
848	{	876	{
849	SV_CORO (prev, "Coro::transfer");	877	dTHX;
850	SV_CORO (next, "Coro::transfer");	878	struct transfer_args ta;
851		879
852	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	880	prepare_transfer (&ta, prev, next, flags);
		881	TRANSFER (ta);
853	}	882	}
854		883
855	/** Coro ********************************************************************/	884	/** Coro ********************************************************************/
856		885
857	#define PRIO_MAX 3	886	#define PRIO_MAX 3
…		…
861	#define PRIO_IDLE -3	890	#define PRIO_IDLE -3
862	#define PRIO_MIN -4	891	#define PRIO_MIN -4
863		892
864	/* for Coro.pm */	893	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;	894	static GV *coro_current, *coro_idle;
866	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;	896	static int coro_nready;
868		897
869	static void	898	static void
870	coro_enq (pTHX_ SV *sv)	899	coro_enq (SV *sv)
871	{	900	{
		901	int prio;
		902
872	if (SvTYPE (sv) == SVt_PVHV)	903	if (SvTYPE (sv) != SVt_PVHV)
873	{
874	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
875	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
876
877	prio = prio > PRIO_MAX ? PRIO_MAX
878	: prio < PRIO_MIN ? PRIO_MIN
879	: prio;
880
881	av_push (coro_ready [prio - PRIO_MIN], sv);
882	coro_nready++;
883
884	return;
885	}
886
887	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++;
888	}	910	}
889		911
890	static SV *	912	static SV *
891	coro_deq (pTHX_ int min_prio)	913	coro_deq (int min_prio)
892	{	914	{
893	int prio = PRIO_MAX - PRIO_MIN;	915	int prio = PRIO_MAX - PRIO_MIN;
894		916
895	min_prio -= PRIO_MIN;	917	min_prio -= PRIO_MIN;
896	if (min_prio < 0)	918	if (min_prio < 0)
897	min_prio = 0;	919	min_prio = 0;
898		920
899	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
900	if (av_len (coro_ready[prio]) >= 0)	922	if (AvFILLp (coro_ready [prio]) >= 0)
901	{	923	{
902	coro_nready--;	924	coro_nready--;
903	return av_shift (coro_ready[prio]);	925	return av_shift (coro_ready [prio]);
904	}	926	}
905		927
906	return 0;	928	return 0;
907	}	929	}
908		930
…		…
913		935
914	if (SvROK (coro))	936	if (SvROK (coro))
915	coro = SvRV (coro);	937	coro = SvRV (coro);
916		938
917	LOCK;	939	LOCK;
918	coro_enq (aTHX_ SvREFCNT_inc (coro));	940	coro_enq (SvREFCNT_inc (coro));
919	UNLOCK;	941	UNLOCK;
920	}	942	}
921		943
922	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
923	api_schedule (void)	1000	api_schedule (void)
924	{	1001	{
925	dTHX;	1002	dTHX;
		1003	struct transfer_args ta;
926		1004
927	SV *prev, *next;	1005	prepare_schedule (&ta);
928		1006	TRANSFER (ta);
929	LOCK;
930
931	prev = SvRV (GvSV (coro_current));
932	next = coro_deq (aTHX_ PRIO_MIN);
933
934	if (!next)
935	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
936
937	/* free this only after the transfer */
938	coro_mortal = prev;
939	SV_CORO (prev, "Coro::schedule");
940
941	SvRV (GvSV (coro_current)) = next;
942
943	SV_CORO (next, "Coro::schedule");
944
945	UNLOCK;
946
947	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
948	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
949	}	1007	}
950		1008
951	static void	1009	static void
952	api_cede (void)	1010	api_cede (void)
953	{	1011	{
954	dTHX;	1012	dTHX;
		1013	struct transfer_args ta;
955		1014
956	LOCK;	1015	prepare_cede (&ta);
957	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1016	TRANSFER (ta);
958	UNLOCK;
959
960	api_schedule ();
961	}	1017	}
962		1018
963	MODULE = Coro::State PACKAGE = Coro::State	1019	MODULE = Coro::State PACKAGE = Coro::State
964		1020
965	PROTOTYPES: ENABLE	1021	PROTOTYPES: DISABLE
966		1022
967	BOOT:	1023	BOOT:
968	{ /* {} necessary for stoopid perl-5.6.x */	1024	{
969	#ifdef USE_ITHREADS	1025	#ifdef USE_ITHREADS
970	MUTEX_INIT (&coro_mutex);	1026	MUTEX_INIT (&coro_mutex);
971	#endif	1027	#endif
		1028	BOOT_PAGESIZE;
972		1029
973	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
974	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
975	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
976		1031
977	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
978	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
979	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
980	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
981		1035
982	main_mainstack = PL_mainstack;	1036	main_mainstack = PL_mainstack;
983		1037
984	coroapi.ver = CORO_API_VERSION;	1038	coroapi.ver = CORO_API_VERSION;
985	coroapi.transfer = api_transfer;	1039	coroapi.transfer = api_transfer;
986	}
987		1040
988	Coro::State	1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
989	_newprocess(args)	1042	}
990	SV * args	1043
991	PROTOTYPE: $	1044	SV *
		1045	new (char *klass, ...)
992	CODE:	1046	CODE:
993	Coro__State coro;	1047	{
		1048	struct coro *coro;
		1049	HV *hv;
		1050	int i;
994		1051
995	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
996	croak ("Coro::State::_newprocess expects an arrayref");
997
998	Newz (0, coro, 1, struct coro);	1052	Newz (0, coro, 1, struct coro);
		1053	coro->args = newAV ();
999		1054
1000	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
1001	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1002	/*coro->stack = 0;*/	1063	/*coro->stack = 0;*/
1003		1064	}
1004	/* same as JMPENV_BOOTSTRAP */
1005	/* we might be able to recycle start_env, but safe is safe */
1006	/*Zero(&coro->start_env, 1, JMPENV);*/
1007	coro->start_env.je_ret = -1;
1008	coro->start_env.je_mustcatch = TRUE;
1009
1010	RETVAL = coro;
1011	OUTPUT:	1065	OUTPUT:
1012	RETVAL	1066	RETVAL
1013		1067
1014	void	1068	void
1015	transfer(prev, next, flags)	1069	_set_stacklevel (...)
1016	SV *prev	1070	ALIAS:
1017	SV *next	1071	Coro::State::transfer = 1
1018	int flags	1072	Coro::schedule = 2
1019	PROTOTYPE: @	1073	Coro::cede = 3
		1074	Coro::Cont::yield = 4
1020	CODE:	1075	CODE:
1021	PUTBACK;	1076	{
1022	SV_CORO (next, "Coro::transfer");	1077	struct transfer_args ta;
1023	SV_CORO (prev, "Coro::transfer");	1078
1024	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1079	switch (ix)
1025	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	}
1026		1132
1027	void	1133	void
1028	DESTROY(coro)	1134	_clone_state_from (SV *dst, SV *src)
1029	Coro::State coro	1135	CODE:
1030	CODE:	1136	{
		1137	struct coro *coro_src = SvSTATE (src);
1031		1138
1032	if (coro->mainstack && coro->mainstack != main_mainstack)	1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1033	{
1034	struct coro temp;
1035		1140
1036	PUTBACK;	1141	++coro_src->refcnt;
1037	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;
1038	LOAD (aTHX_ coro);	1143	}
1039	SPAGAIN;
1040
1041	destroy_stacks (aTHX);
1042
1043	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1044	SPAGAIN;
1045
1046	coro->mainstack = 0;
1047	}
1048
1049	deallocate_stack (coro);
1050	SvREFCNT_dec (coro->args);
1051	Safefree (coro);
1052		1144
1053	void	1145	void
1054	_exit(code)	1146	_exit (code)
1055	int code	1147	int code
1056	PROTOTYPE: $	1148	PROTOTYPE: $
1057	CODE:	1149	CODE:
1058	_exit (code);	1150	_exit (code);
1059		1151
1060	MODULE = Coro::State PACKAGE = Coro::Cont
1061
1062	# this is slightly dirty (should expose a c-level api)
1063
1064	void
1065	yield(...)
1066	PROTOTYPE: @
1067	CODE:
1068	SV *yieldstack;
1069	SV *sv;
1070	AV *defav = GvAV (PL_defgv);
1071	struct coro *prev, *next;
1072
1073	yieldstack = *hv_fetch (
1074	(HV *)SvRV (GvSV (coro_current)),
1075	"yieldstack", sizeof ("yieldstack") - 1,
1076	0
1077	);
1078
1079	/* set up @_ -- ugly */
1080	av_clear (defav);
1081	av_fill (defav, items - 1);
1082	while (items--)
1083	av_store (defav, items, SvREFCNT_inc (ST(items)));
1084
1085	sv = av_pop ((AV *)SvRV (yieldstack));
1086	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1087	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1088	SvREFCNT_dec (sv);
1089
1090	transfer (aTHX_ prev, next, 0);
1091
1092	MODULE = Coro::State PACKAGE = Coro	1152	MODULE = Coro::State PACKAGE = Coro
1093		1153
1094	# this is slightly dirty (should expose a c-level api)
1095
1096	BOOT:	1154	BOOT:
1097	{	1155	{
1098	int i;	1156	int i;
		1157
1099	HV *stash = gv_stashpv ("Coro", TRUE);	1158	coro_stash = gv_stashpv ("Coro", TRUE);
1100		1159
1101	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1160	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1102	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1161	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1103	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1104	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1105	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1106	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1107		1166
1108	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1109	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1110		1169
1111	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1119	coroapi.ready = api_ready;	1178	coroapi.ready = api_ready;
1120	coroapi.nready = &coro_nready;	1179	coroapi.nready = &coro_nready;
1121	coroapi.current = coro_current;	1180	coroapi.current = coro_current;
1122		1181
1123	GCoroAPI = &coroapi;	1182	GCoroAPI = &coroapi;
1124	sv_setiv(sv, (IV)&coroapi);	1183	sv_setiv (sv, (IV)&coroapi);
1125	SvREADONLY_on(sv);	1184	SvREADONLY_on (sv);
1126	}	1185	}
1127	}	1186	}
1128		1187
1129	#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	}
1130		1207
1131	void	1208	void
1132	ready(self)	1209	ready (SV *self)
1133	SV * self
1134	PROTOTYPE: $	1210	PROTOTYPE: $
1135	CODE:	1211	CODE:
1136	api_ready (self);	1212	api_ready (self);
1137		1213
1138	#endif
1139
1140	int	1214	int
1141	nready(...)	1215	nready (...)
1142	PROTOTYPE:	1216	PROTOTYPE:
1143	CODE:	1217	CODE:
1144	RETVAL = coro_nready;	1218	RETVAL = coro_nready;
1145	OUTPUT:	1219	OUTPUT:
1146	RETVAL	1220	RETVAL
1147		1221
1148	void	1222	MODULE = Coro::State PACKAGE = Coro::AIO
1149	schedule(...)
1150	PROTOTYPE:
1151	CODE:
1152	api_schedule ();
1153		1223
1154	void
1155	cede(...)
1156	PROTOTYPE:
1157	CODE:
1158	api_cede ();
1159
1160	# and these are hacks
1161	SV *	1224	SV *
1162	_aio_get_state ()	1225	_get_state ()
1163	CODE:	1226	CODE:
1164	{	1227	{
1165	struct {	1228	struct {
1166	int errorno;	1229	int errorno;
1167	int laststype;	1230	int laststype;
…		…
1178	}	1241	}
1179	OUTPUT:	1242	OUTPUT:
1180	RETVAL	1243	RETVAL
1181		1244
1182	void	1245	void
1183	_aio_set_state (char *data_)	1246	_set_state (char *data_)
1184	PROTOTYPE: $	1247	PROTOTYPE: $
1185	CODE:	1248	CODE:
1186	{	1249	{
1187	struct {	1250	struct {
1188	int errorno;	1251	int errorno;

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