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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs.
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PATCHLEVEL < 6	9	#if PERL_VERSION < 6
12	# ifndef PL_ppaddr	10	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	11	# define PL_ppaddr ppaddr
14	# endif	12	# endif
15	# ifndef call_sv	13	# ifndef call_sv
16	# define call_sv perl_call_sv	14	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	25	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	26	# define IS_PADCONST(v) 0
29	# endif	27	# endif
30	#endif	28	#endif
31		29
32	#include <signal.h>	30	#include <stdio.h>
		31	#include <errno.h>
		32
		33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		34	# undef STACKGUARD
		35	#endif
		36
		37	#ifndef STACKGUARD
		38	# define STACKGUARD 0
		39	#endif
33		40
34	#ifdef HAVE_MMAP	41	#ifdef HAVE_MMAP
35	# include <unistd.h>	42	# include <unistd.h>
36	# include <sys/mman.h>	43	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	44	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	46	# define MAP_ANONYMOUS MAP_ANON
40	# else	47	# else
41	# undef HAVE_MMAP	48	# undef HAVE_MMAP
42	# endif	49	# endif
43	# endif	50	# endif
		51	# include <limits.h>
		52	# ifndef PAGESIZE
		53	# define PAGESIZE pagesize
		54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		55	static long pagesize;
		56	# else
		57	# define BOOT_PAGESIZE
44	#endif	58	# endif
45		59	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		60
49	/* The next macro should declare a variable stacklevel that contains and approximation	61	/* 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	62	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	63	* and should be unique. */
		64	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	65	#define STACKLEVEL ((void *)&stacklevel)
53		66
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	67	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		68
56	#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58	#include "CoroAPI.h"	69	#include "CoroAPI.h"
		70
		71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		72
60	#ifdef USE_ITHREADS	73	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	74	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	77	#else
65	# define LOCK 0	78	# define LOCK (void)0
66	# define UNLOCK 0	79	# define UNLOCK (void)0
67	#endif	80	#endif
68		81
69	static struct CoroAPI coroapi;	82	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	83	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	84	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 */	85	static SV *coro_mortal; /* will be freed after next transfer */
75		86
76	/* this is actually not only the c stack but also c registers etc... */	87	/* this is a structure representing a c-level coroutine */
77	typedef struct {	88	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	89	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		90
82	coro_context cctx;	91	/* the stack */
83
84	void *sptr;	92	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	93	long ssize; /* positive == mmap, otherwise malloc */
		94
		95	/* cpu state */
		96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		97	JMPENV *top_env;
		98	coro_context cctx;
86	} coro_stack;	99	} coro_stack;
87		100
		101	/* this is a structure representing a perl-level coroutine */
88	struct coro {	102	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	103	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	104	coro_stack *stack;
94	void *cursp;	105
		106	/* data associated with this coroutine (initial args) */
		107	AV *args;
95	int gencnt;	108	int refcnt;
96		109
97	/* optionally saved, might be zero */	110	/* optionally saved, might be zero */
98	AV *defav;	111	AV *defav;
99	SV *defsv;	112	SV *defsv;
100	SV *errsv;	113	SV *errsv;
…		…
128	I32 savestack_ix;	141	I32 savestack_ix;
129	I32 savestack_max;	142	I32 savestack_max;
130	OP **retstack;	143	OP **retstack;
131	I32 retstack_ix;	144	I32 retstack_ix;
132	I32 retstack_max;	145	I32 retstack_max;
		146	PMOP *curpm;
133	COP *curcop;	147	COP *curcop;
134	JMPENV *top_env;
135		148
136	/* data associated with this coroutine (initial args) */	149	/* coro process data */
137	AV *args;	150	int prio;
138	};	151	};
139		152
140	typedef struct coro *Coro__State;	153	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	154	typedef struct coro *Coro__State_or_hashref;
142		155
143	/* mostly copied from op.c:cv_clone2 */	156	static AV *
144	STATIC AV *	157	coro_clone_padlist (CV *cv)
145	clone_padlist (pTHX_ AV *protopadlist)
146	{	158	{
147	AV *av;	159	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV *newpadlist, *newpad_name, *newpad;	160	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		161
166	newpadlist = newAV ();	162	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	163	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	164	#if PERL_VERSION < 9
		165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#else
		167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		168	#endif
		169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		170	--AvFILLp (padlist);
		171
		172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	173	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		174
240	return newpadlist;	175	return newpadlist;
241	}	176	}
242		177
243	STATIC void	178	static void
244	free_padlist (pTHX_ AV *padlist)	179	free_padlist (AV *padlist)
245	{	180	{
246	/* may be during global destruction */	181	/* may be during global destruction */
247	if (SvREFCNT (padlist))	182	if (SvREFCNT (padlist))
248	{	183	{
249	I32 i = AvFILLp (padlist);	184	I32 i = AvFILLp (padlist);
…		…
262		197
263	SvREFCNT_dec ((SV*)padlist);	198	SvREFCNT_dec ((SV*)padlist);
264	}	199	}
265	}	200	}
266		201
267	STATIC int	202	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	203	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	204	{
270	AV *padlist;	205	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	206	AV *av = (AV *)mg->mg_obj;
272		207
273	/* casting is fun. */	208	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	210	free_padlist (padlist);
276		211
277	SvREFCNT_dec (av);	212	SvREFCNT_dec (av);
		213
		214	return 0;
278	}	215	}
279		216
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	217	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		218
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		220
284	/* the next two functions merely cache the padlists */	221	/* the next two functions merely cache the padlists */
285	STATIC void	222	static void
286	get_padlist (pTHX_ CV *cv)	223	get_padlist (CV *cv)
287	{	224	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289		226
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
292	else	229	else
		230	{
		231	#if 0
		232	/* this is probably cleaner, but also slower? */
		233	CV *cp = Perl_cv_clone (cv);
		234	CvPADLIST (cv) = CvPADLIST (cp);
		235	CvPADLIST (cp) = 0;
		236	SvREFCNT_dec (cp);
		237	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	238	CvPADLIST (cv) = coro_clone_padlist (cv);
		239	#endif
		240	}
294	}	241	}
295		242
296	STATIC void	243	static void
297	put_padlist (pTHX_ CV *cv)	244	put_padlist (CV *cv)
298	{	245	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
300		247
301	if (!mg)	248	if (!mg)
302	{	249	{
…		…
310	}	257	}
311		258
312	#define SB do {	259	#define SB do {
313	#define SE } while (0)	260	#define SE } while (0)
314		261
315	#define LOAD(state) load_state(aTHX_ (state));	262	#define LOAD(state) load_state((state));
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	263	#define SAVE(state,flags) save_state((state),(flags));
317		264
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
319		266
320	static void	267	static void
321	load_state(pTHX_ Coro__State c)	268	load_state(Coro__State c)
322	{	269	{
323	PL_dowarn = c->dowarn;	270	PL_dowarn = c->dowarn;
324	PL_in_eval = c->in_eval;	271	PL_in_eval = c->in_eval;
325		272
326	PL_curstackinfo = c->curstackinfo;	273	PL_curstackinfo = c->curstackinfo;
…		…
344	PL_scopestack_ix = c->scopestack_ix;	291	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;	292	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;	293	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;	294	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;	295	PL_savestack_max = c->savestack_max;
		296	#if PERL_VERSION < 9
349	PL_retstack = c->retstack;	297	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;	298	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;	299	PL_retstack_max = c->retstack_max;
		300	#endif
		301	PL_curpm = c->curpm;
352	PL_curcop = c->curcop;	302	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		303
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
358		307
…		…
365	{	314	{
366	AV *padlist = (AV *)POPs;	315	AV *padlist = (AV *)POPs;
367		316
368	if (padlist)	317	if (padlist)
369	{	318	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	319	put_padlist (cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	320	CvPADLIST(cv) = padlist;
372	}	321	}
373		322
374	++CvDEPTH(cv);	323	++CvDEPTH(cv);
375	}	324	}
…		…
377	PUTBACK;	326	PUTBACK;
378	}	327	}
379	}	328	}
380		329
381	static void	330	static void
382	save_state(pTHX_ Coro__State c, int flags)	331	save_state(Coro__State c, int flags)
383	{	332	{
384	{	333	{
385	dSP;	334	dSP;
386	I32 cxix = cxstack_ix;	335	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	336	PERL_CONTEXT *ccstk = cxstack;
…		…
415	}	364	}
416		365
417	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST(cv));
418	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
419		368
420	get_padlist (aTHX_ cv); /* this is a monster */	369	get_padlist (cv);
421	}	370	}
422	}	371	}
423	#ifdef CXt_FORMAT	372	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)	373	else if (CxTYPE(cx) == CXt_FORMAT)
425	{	374	{
…		…
469	c->scopestack_ix = PL_scopestack_ix;	418	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;	419	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;	420	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;	421	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;	422	c->savestack_max = PL_savestack_max;
		423	#if PERL_VERSION < 9
474	c->retstack = PL_retstack;	424	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;	425	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;	426	c->retstack_max = PL_retstack_max;
		427	#endif
		428	c->curpm = PL_curpm;
477	c->curcop = PL_curcop;	429	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	430	}
480		431
481	/*	432	/*
482	* allocate various perl stacks. This is an exact copy	433	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	434	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	435	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	436	* not usually need a lot of stackspace.
486	*/	437	*/
487	STATIC void	438	static void
488	coro_init_stacks (pTHX)	439	coro_init_stacks ()
489	{	440	{
490	LOCK;
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	442	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	443	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		445
…		…
517		466
518	New(54,PL_savestack,96,ANY);	467	New(54,PL_savestack,96,ANY);
519	PL_savestack_ix = 0;	468	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	469	PL_savestack_max = 96;
521		470
		471	#if PERL_VERSION < 9
522	New(54,PL_retstack,8,OP*);	472	New(54,PL_retstack,8,OP*);
523	PL_retstack_ix = 0;	473	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	474	PL_retstack_max = 8;
525		475	#endif
526	UNLOCK;
527	}	476	}
528		477
529	/*	478	/*
530	* destroy the stacks, the callchain etc...	479	* destroy the stacks, the callchain etc...
531	*/	480	*/
532	STATIC void	481	static void
533	destroy_stacks(pTHX)	482	destroy_stacks()
534	{	483	{
535	if (!IN_DESTRUCT)	484	if (!IN_DESTRUCT)
536	{	485	{
537	/* is this ugly, I ask? */	486	/* is this ugly, I ask? */
538	LEAVE_SCOPE (0);	487	LEAVE_SCOPE (0);
…		…
569		518
570	Safefree (PL_tmps_stack);	519	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	520	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	521	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	522	Safefree (PL_savestack);
		523	#if PERL_VERSION < 9
574	Safefree (PL_retstack);	524	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	525	#endif
595	{
596	/*FIXME*//*D*//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}	526	}
606		527
607	static void	528	static void
608	deallocate_stack (Coro__State ctx)	529	setup_coro (struct coro *coro)
609	{
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void
633	setup_coro (void *arg)
634	{	530	{
635	/*	531	/*
636	* emulate part of the perl startup here.	532	* emulate part of the perl startup here.
637	*/	533	*/
638	dTHX;	534	dTHX;
639	dSP;	535	dSP;
640	Coro__State ctx = (Coro__State)arg;	536	UNOP myop;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
642		538
643	coro_init_stacks (aTHX);	539	coro_init_stacks ();
644	/*PL_curcop = 0;*/	540	/*PL_curcop = 0;*/
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */	541	/*PL_in_eval = PL_in_eval;*/ /* inherit */
646	SvREFCNT_dec (GvAV (PL_defgv));	542	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	543	GvAV (PL_defgv) = coro->args; coro->args = 0;
648		544
649	SPAGAIN;	545	SPAGAIN;
650		546
651	if (ctx->stack)
652	{
653	ctx->cursp = 0;
654
655	PUSHMARK(SP);
656	PUTBACK;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659	if (SvTRUE (ERRSV))
660	croak (NULL);
661	else
662	croak ("FATAL: CCTXT coroutine returned!");
663	}
664	else
665	{
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);	547	Zero (&myop, 1, UNOP);
671	myop.op_next = Nullop;	548	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;	549	myop.op_flags = OPf_WANT_VOID;
673		550
		551	PL_op = (OP *)&myop;
		552
674	PUSHMARK(SP);	553	PUSHMARK(SP);
675	XPUSHs (sub_init);	554	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;	555	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;	557	SPAGAIN;
686		558
687	ENTER; /* necessary e.g. for dounwind */	559	ENTER; /* necessary e.g. for dounwind */
688	}
689	}	560	}
690		561
691	static void	562	static void
692	continue_coro (void *arg)	563	free_coro_mortal ()
693	{	564	{
694	/*
695	* this is a _very_ stripped down perl interpreter ;)
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700
701	PL_top_env = &ctx->start_env;
702
703	ctx->cursp = 0;
704	PL_op = PL_op->op_next;
705	CALLRUNOPS(aTHX);
706
707	abort ();
708	}
709
710	STATIC void
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
712	{
713	dSTACKLEVEL;
714
715	if (prev != next)
716	{
717	if (next->mainstack)
718	{
719	LOCK;
720	SAVE (prev, flags);
721	LOAD (next);
722	UNLOCK;
723
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}
757	else if (next->tmps_ix == -2)
758	croak ("tried to transfer to running coroutine");
759	else
760	{
761	LOCK;
762	SAVE (prev, -1); /* first get rid of the old state */
763	UNLOCK;
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}
800	}
801
802	LOCK;
803	if (coro_mortal)	565	if (coro_mortal)
804	{	566	{
805	SvREFCNT_dec (coro_mortal);	567	SvREFCNT_dec (coro_mortal);
806	coro_mortal = 0;	568	coro_mortal = 0;
807	}	569	}
		570	}
		571
		572	static void
		573	prepare_cctx (coro_stack *cctx)
		574	{
		575	dSP;
		576	UNOP myop;
		577
		578	Zero (&myop, 1, UNOP);
		579	myop.op_next = PL_op;
		580	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		581
		582	PUSHMARK(SP);
		583	EXTEND (SP, 2);
		584	PUSHs (newSViv (PTR2IV (cctx)));
		585	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		586	PUTBACK;
		587	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		588	SPAGAIN;
		589	}
		590
		591	static void
		592	coro_run (void *arg)
		593	{
		594	/*
		595	* this is a _very_ stripped down perl interpreter ;)
		596	*/
808	UNLOCK;	597	UNLOCK;
809	}
810		598
811	#define SV_CORO(sv,func) \	599	PL_top_env = &PL_start_env;
812	do { \	600	prepare_cctx ((coro_stack *)arg);
813	if (SvROK (sv)) \
814	sv = SvRV (sv); \
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		601
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	602	/* somebody will hit me for both perl_run and PL_restartop */
		603	perl_run (PERL_GET_CONTEXT);
833		604
		605	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		606	abort ();
		607	}
		608
		609	static coro_stack *
		610	stack_new ()
		611	{
		612	coro_stack *stack;
		613
		614	New (0, stack, 1, coro_stack);
		615
		616	#if HAVE_MMAP
		617
		618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		619	/* mmap suppsedly does allocate-on-write for us */
		620	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		621
		622	if (stack->sptr == (void *)-1)
		623	{
		624	perror ("FATAL: unable to mmap stack for coroutine");
		625	_exit (EXIT_FAILURE);
		626	}
		627
		628	# if STACKGUARD
		629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		630	# endif
		631
		632	#else
		633
		634	stack->ssize = STACKSIZE * (long)sizeof (long);
		635	New (0, stack->sptr, STACKSIZE, long);
		636
		637	if (!stack->sptr)
		638	{
		639	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		640	_exit (EXIT_FAILURE);
		641	}
		642
		643	#endif
		644
		645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		646
		647	return stack;
		648	}
		649
		650	static void
		651	stack_free (coro_stack *stack)
		652	{
		653	if (!stack)
		654	return;
		655
		656	#if HAVE_MMAP
		657	munmap (stack->sptr, stack->ssize);
		658	#else
		659	Safefree (stack->sptr);
		660	#endif
		661
		662	Safefree (stack);
		663	}
		664
		665	static coro_stack *stack_first;
		666
		667	static coro_stack *
		668	stack_get ()
		669	{
		670	coro_stack *stack;
		671
		672	if (stack_first)
		673	{
		674	stack = stack_first;
		675	stack_first = stack->next;
		676	}
		677	else
		678	{
		679	stack = stack_new ();
		680	PL_op = PL_op->op_next;
		681	}
		682
		683	return stack;
		684	}
		685
		686	static void
		687	stack_put (coro_stack *stack)
		688	{
		689	stack->next = stack_first;
		690	stack_first = stack;
		691	}
		692
		693	/* never call directly, always through the coro_state_transfer global variable */
		694	static void
		695	transfer_impl (struct coro *prev, struct coro *next, int flags)
		696	{
		697	dSTACKLEVEL;
		698
		699	/* sometimes transfer is only called to set idle_sp */
		700	if (flags == TRANSFER_SET_STACKLEVEL)
		701	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		702	else if (prev != next)
		703	{
		704	coro_stack *prev__stack;
		705
		706	LOCK;
		707
		708	if (next->mainstack)
		709	{
		710	/* coroutine already started */
		711	SAVE (prev, flags);
		712	LOAD (next);
		713	}
		714	else
		715	{
		716	/* need to start coroutine */
		717	/* first get rid of the old state */
		718	SAVE (prev, -1);
		719	/* setup coroutine call */
		720	setup_coro (next);
		721	/* need a stack */
		722	next->stack = 0;
		723	}
		724
		725	if (!prev->stack)
		726	/* create a new empty context */
		727	Newz (0, prev->stack, 1, coro_stack);
		728
		729	prev__stack = prev->stack;
		730
		731	/* possibly "free" the stack */
		732	if (prev__stack->idle_sp == STACKLEVEL)
		733	{
		734	stack_put (prev__stack);
		735	prev->stack = 0;
		736	}
		737
		738	if (!next->stack)
		739	next->stack = stack_get ();
		740
		741	if (prev__stack != next->stack)
		742	{
		743	prev__stack->top_env = PL_top_env;
		744	PL_top_env = next->stack->top_env;
		745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		746	}
		747
		748	free_coro_mortal ();
		749
		750	UNLOCK;
		751	}
		752	}
		753
		754	/* use this function pointer to call the above function */
		755	/* this is done to increase chances of the compiler not inlining the call */
		756	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		757	void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
		758
		759	struct transfer_args
		760	{
		761	struct coro *prev, *next;
		762	int flags;
		763	};
		764
		765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		766
		767	static void
		768	coro_state_destroy (struct coro *coro)
		769	{
		770	if (coro->refcnt--)
		771	return;
		772
		773	if (coro->mainstack && coro->mainstack != main_mainstack)
		774	{
		775	struct coro temp;
		776
		777	SAVE ((&temp), TRANSFER_SAVE_ALL);
		778	LOAD (coro);
		779
		780	destroy_stacks ();
		781
		782	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		783
		784	coro->mainstack = 0;
		785	}
		786
		787	stack_free (coro->stack);
		788	SvREFCNT_dec (coro->args);
		789	Safefree (coro);
		790	}
		791
834	static void	792	static int
		793	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		794	{
		795	struct coro *coro = (struct coro *)mg->mg_ptr;
		796	mg->mg_ptr = 0;
		797
		798	coro_state_destroy (coro);
		799
		800	return 0;
		801	}
		802
		803	static int
		804	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		805	{
		806	struct coro *coro = (struct coro *)mg->mg_ptr;
		807
		808	++coro->refcnt;
		809
		810	return 0;
		811	}
		812
		813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		814
		815	static struct coro *
		816	SvSTATE (SV *coro)
		817	{
		818	HV *stash;
		819	MAGIC *mg;
		820
		821	if (SvROK (coro))
		822	coro = SvRV (coro);
		823
		824	stash = SvSTASH (coro);
		825	if (stash != coro_stash && stash != coro_state_stash)
		826	{
		827	/* very slow, but rare, check */
		828	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		829	croak ("Coro::State object required");
		830	}
		831
		832	mg = SvMAGIC (coro);
		833	assert (mg->mg_type == PERL_MAGIC_ext);
		834	return (struct coro *)mg->mg_ptr;
		835	}
		836
		837	static void
		838	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		839	{
		840	ta->prev = SvSTATE (prev);
		841	ta->next = SvSTATE (next);
		842	ta->flags = flags;
		843	}
		844
		845	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	846	api_transfer (SV *prev, SV *next, int flags)
836	{	847	{
837	SV_CORO (prev, "Coro::transfer");	848	dTHX;
838	SV_CORO (next, "Coro::transfer");	849	struct transfer_args ta;
839		850
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	851	prepare_transfer (&ta, prev, next, flags);
		852	TRANSFER (ta);
841	}	853	}
842		854
843	/** Coro ********************************************************************/	855	/** Coro ********************************************************************/
844		856
845	#define PRIO_MAX 3	857	#define PRIO_MAX 3
…		…
849	#define PRIO_IDLE -3	861	#define PRIO_IDLE -3
850	#define PRIO_MIN -4	862	#define PRIO_MIN -4
851		863
852	/* for Coro.pm */	864	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;	865	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;	867	static int coro_nready;
856		868
857	static void	869	static void
858	coro_enq (pTHX_ SV *sv)	870	coro_enq (SV *sv)
859	{	871	{
		872	int prio;
		873
860	if (SvTYPE (sv) == SVt_PVHV)	874	if (SvTYPE (sv) != SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);
870	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");	875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		876
		877	prio = SvSTATE (sv)->prio;
		878
		879	av_push (coro_ready [prio - PRIO_MIN], sv);
		880	coro_nready++;
876	}	881	}
877		882
878	static SV *	883	static SV *
879	coro_deq (pTHX_ int min_prio)	884	coro_deq (int min_prio)
880	{	885	{
881	int prio = PRIO_MAX - PRIO_MIN;	886	int prio = PRIO_MAX - PRIO_MIN;
882		887
883	min_prio -= PRIO_MIN;	888	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	889	if (min_prio < 0)
885	min_prio = 0;	890	min_prio = 0;
886		891
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	893	if (AvFILLp (coro_ready [prio]) >= 0)
889	{	894	{
890	coro_nready--;	895	coro_nready--;
891	return av_shift (coro_ready[prio]);	896	return av_shift (coro_ready [prio]);
892	}	897	}
893		898
894	return 0;	899	return 0;
895	}	900	}
896		901
…		…
901		906
902	if (SvROK (coro))	907	if (SvROK (coro))
903	coro = SvRV (coro);	908	coro = SvRV (coro);
904		909
905	LOCK;	910	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	911	coro_enq (SvREFCNT_inc (coro));
907	UNLOCK;	912	UNLOCK;
908	}	913	}
909		914
910	static void	915	static void
		916	prepare_schedule (struct transfer_args *ta)
		917	{
		918	SV *current, *prev, *next;
		919
		920	current = GvSV (coro_current);
		921
		922	for (;;)
		923	{
		924	LOCK;
		925	next = coro_deq (PRIO_MIN);
		926	UNLOCK;
		927
		928	if (next)
		929	break;
		930
		931	{
		932	dSP;
		933
		934	ENTER;
		935	SAVETMPS;
		936
		937	PUSHMARK (SP);
		938	PUTBACK;
		939	call_sv (GvSV (coro_idle), G_DISCARD);
		940
		941	FREETMPS;
		942	LEAVE;
		943	}
		944	}
		945
		946	prev = SvRV (current);
		947	SvRV (current) = next;
		948
		949	/* free this only after the transfer */
		950	LOCK;
		951	free_coro_mortal ();
		952	UNLOCK;
		953	coro_mortal = prev;
		954
		955	ta->prev = SvSTATE (prev);
		956	ta->next = SvSTATE (next);
		957	ta->flags = TRANSFER_SAVE_ALL;
		958	}
		959
		960	static void
		961	prepare_cede (struct transfer_args *ta)
		962	{
		963	LOCK;
		964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		965	UNLOCK;
		966
		967	prepare_schedule (ta);
		968	}
		969
		970	static void
911	api_schedule (void)	971	api_schedule (void)
912	{	972	{
913	dTHX;	973	dTHX;
		974	struct transfer_args ta;
914		975
915	SV *prev, *next;	976	prepare_schedule (&ta);
916		977	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	978	}
938		979
939	static void	980	static void
940	api_cede (void)	981	api_cede (void)
941	{	982	{
942	dTHX;	983	dTHX;
		984	struct transfer_args ta;
943		985
944	LOCK;	986	prepare_cede (&ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	987	TRANSFER (ta);
946	UNLOCK;
947
948	api_schedule ();
949	}	988	}
950		989
951	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
952		991
953	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
954		993
955	BOOT:	994	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	995	{
957	#ifdef USE_ITHREADS	996	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	997	MUTEX_INIT (&coro_mutex);
959	#endif	998	#endif
		999	BOOT_PAGESIZE;
960		1000
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1002
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
969		1006
970	main_mainstack = PL_mainstack;	1007	main_mainstack = PL_mainstack;
971		1008
972	coroapi.ver = CORO_API_VERSION;	1009	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1010	coroapi.transfer = api_transfer;
974	}
975		1011
976	Coro::State	1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1013	}
978	SV * args	1014
979	PROTOTYPE: $	1015	SV *
		1016	new (char *klass, ...)
980	CODE:	1017	CODE:
981	Coro__State coro;	1018	{
		1019	struct coro *coro;
		1020	HV *hv;
		1021	int i;
982		1022
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1023	Newz (0, coro, 1, struct coro);
		1024	coro->args = newAV ();
987		1025
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1026	hv = newHV ();
		1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1029
		1030	for (i = 1; i < items; i++)
		1031	av_push (coro->args, newSVsv (ST (i)));
		1032
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
990	/*coro->stack = 0;*/	1034	/*coro->stack = 0;*/
991		1035	}
992	/* same as JMPENV_BOOTSTRAP */
993	/* we might be able to recycle start_env, but safe is safe */
994	/*Zero(&coro->start_env, 1, JMPENV);*/
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997
998	RETVAL = coro;
999	OUTPUT:	1036	OUTPUT:
1000	RETVAL	1037	RETVAL
1001		1038
1002	void	1039	void
1003	transfer(prev, next, flags)	1040	_set_stacklevel (...)
1004	SV *prev	1041	ALIAS:
1005	SV *next	1042	Coro::State::transfer = 1
1006	int flags	1043	Coro::schedule = 2
1007	PROTOTYPE: @	1044	Coro::cede = 3
		1045	Coro::Cont::yield = 4
1008	CODE:	1046	CODE:
1009	PUTBACK;	1047	{
1010	SV_CORO (next, "Coro::transfer");	1048	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1049
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1050	switch (ix)
1013	SPAGAIN;	1051	{
		1052	case 0:
		1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1054	ta.next = 0;
		1055	ta.flags = TRANSFER_SET_STACKLEVEL;
		1056	break;
		1057
		1058	case 1:
		1059	if (items != 3)
		1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1061
		1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1063	break;
		1064
		1065	case 2:
		1066	prepare_schedule (&ta);
		1067	break;
		1068
		1069	case 3:
		1070	prepare_cede (&ta);
		1071	break;
		1072
		1073	case 4:
		1074	{
		1075	SV *yieldstack;
		1076	SV *sv;
		1077	AV *defav = GvAV (PL_defgv);
		1078
		1079	yieldstack = *hv_fetch (
		1080	(HV *)SvRV (GvSV (coro_current)),
		1081	"yieldstack", sizeof ("yieldstack") - 1,
		1082	0
		1083	);
		1084
		1085	/* set up @_ -- ugly */
		1086	av_clear (defav);
		1087	av_fill (defav, items - 1);
		1088	while (items--)
		1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1090
		1091	sv = av_pop ((AV *)SvRV (yieldstack));
		1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1094	ta.flags = 0;
		1095	SvREFCNT_dec (sv);
		1096	}
		1097	break;
		1098
		1099	}
		1100
		1101	TRANSFER (ta);
		1102	}
1014		1103
1015	void	1104	void
1016	DESTROY(coro)	1105	_clone_state_from (SV *dst, SV *src)
1017	Coro::State coro	1106	CODE:
1018	CODE:	1107	{
		1108	struct coro *coro_src = SvSTATE (src);
1019		1109
1020	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1021	{
1022	struct coro temp;
1023		1111
1024	PUTBACK;	1112	++coro_src->refcnt;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1026	LOAD (aTHX_ coro);	1114	}
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040		1115
1041	void	1116	void
		1117	_nonlocal_goto (IV nextop)
		1118	CODE:
		1119	/* uuh, somebody will kill me again for this */
		1120	PL_op->op_next = INT2PTR (OP *, nextop);
		1121
		1122	void
1042	_exit(code)	1123	_exit (code)
1043	int code	1124	int code
1044	PROTOTYPE: $	1125	PROTOTYPE: $
1045	CODE:	1126	CODE:
1046	_exit (code);	1127	_exit (code);
1047		1128
1048	MODULE = Coro::State PACKAGE = Coro::Cont
1049
1050	# this is slightly dirty (should expose a c-level api)
1051
1052	void
1053	yield(...)
1054	PROTOTYPE: @
1055	CODE:
1056	static SV *returnstk;
1057	SV *sv;
1058	AV *defav = GvAV (PL_defgv);
1059	struct coro *prev, *next;
1060
1061	if (!returnstk)
1062	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064	/* set up @_ -- ugly */
1065	av_clear (defav);
1066	av_fill (defav, items - 1);
1067	while (items--)
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071	sv = av_pop ((AV *)SvRV (returnstk));
1072	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074	SvREFCNT_dec (sv);
1075
1076	transfer (aTHX_ prev, next, 0);
1077
1078	MODULE = Coro::State PACKAGE = Coro	1129	MODULE = Coro::State PACKAGE = Coro
1079		1130
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1131	BOOT:
1083	{	1132	{
1084	int i;	1133	int i;
		1134
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1135	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1136
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093		1143
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1096		1146
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1105	coroapi.ready = api_ready;	1155	coroapi.ready = api_ready;
1106	coroapi.nready = &coro_nready;	1156	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1157	coroapi.current = coro_current;
1108		1158
1109	GCoroAPI = &coroapi;	1159	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1160	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1161	SvREADONLY_on (sv);
1112	}	1162	}
1113	}	1163	}
1114		1164
1115	#if !PERL_MICRO	1165	int
		1166	prio (Coro::State coro, int newprio = 0)
		1167	ALIAS:
		1168	nice = 1
		1169	CODE:
		1170	{
		1171	RETVAL = coro->prio;
		1172
		1173	if (items > 1)
		1174	{
		1175	if (ix)
		1176	newprio += coro->prio;
		1177
		1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1180
		1181	coro->prio = newprio;
		1182	}
		1183	}
1116		1184
1117	void	1185	void
1118	ready(self)	1186	ready (SV *self)
1119	SV * self
1120	PROTOTYPE: $	1187	PROTOTYPE: $
1121	CODE:	1188	CODE:
1122	api_ready (self);	1189	api_ready (self);
1123		1190
1124	#endif
1125
1126	int	1191	int
1127	nready(...)	1192	nready (...)
1128	PROTOTYPE:	1193	PROTOTYPE:
1129	CODE:	1194	CODE:
1130	RETVAL = coro_nready;	1195	RETVAL = coro_nready;
1131	OUTPUT:	1196	OUTPUT:
1132	RETVAL	1197	RETVAL
1133		1198
		1199	MODULE = Coro::State PACKAGE = Coro::AIO
		1200
		1201	SV *
		1202	_get_state ()
		1203	CODE:
		1204	{
		1205	struct {
		1206	int errorno;
		1207	int laststype;
		1208	int laststatval;
		1209	Stat_t statcache;
		1210	} data;
		1211
		1212	data.errorno = errno;
		1213	data.laststype = PL_laststype;
		1214	data.laststatval = PL_laststatval;
		1215	data.statcache = PL_statcache;
		1216
		1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1218	}
		1219	OUTPUT:
		1220	RETVAL
		1221
1134	void	1222	void
1135	schedule(...)	1223	_set_state (char *data_)
1136	PROTOTYPE:	1224	PROTOTYPE: $
1137	CODE:	1225	CODE:
1138	api_schedule ();	1226	{
		1227	struct {
		1228	int errorno;
		1229	int laststype;
		1230	int laststatval;
		1231	Stat_t statcache;
		1232	} *data = (void *)data_;
1139		1233
1140	void	1234	errno = data->errorno;
1141	cede(...)	1235	PL_laststype = data->laststype;
1142	PROTOTYPE:	1236	PL_laststatval = data->laststatval;
1143	CODE:	1237	PL_statcache = data->statcache;
1144	api_cede ();	1238	}
1145

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