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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.69 by root, Fri Dec 16 01:33:20 2005 UTC vs.
Revision 1.101 by root, Mon Nov 27 00:08:18 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 (5,8,0)
12	# ifndef PL_ppaddr	16	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	17	# define PL_ppaddr ppaddr
14	# endif	18	# endif
15	# ifndef call_sv	19	# ifndef call_sv
16	# define call_sv perl_call_sv	20	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	31	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	32	# define IS_PADCONST(v) 0
29	# endif	33	# endif
30	#endif	34	#endif
31		35
32	#include <signal.h>	36	#include <stdio.h>
		37	#include <errno.h>
		38
		39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		40	# undef STACKGUARD
		41	#endif
		42
		43	#ifndef STACKGUARD
		44	# define STACKGUARD 0
		45	#endif
33		46
34	#ifdef HAVE_MMAP	47	#ifdef HAVE_MMAP
35	# include <unistd.h>	48	# include <unistd.h>
36	# include <sys/mman.h>	49	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	50	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	52	# define MAP_ANONYMOUS MAP_ANON
40	# else	53	# else
41	# undef HAVE_MMAP	54	# undef HAVE_MMAP
42	# endif	55	# endif
43	# endif	56	# endif
		57	# include <limits.h>
		58	# ifndef PAGESIZE
		59	# define PAGESIZE pagesize
		60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		61	static long pagesize;
		62	# else
		63	# define BOOT_PAGESIZE
44	#endif	64	# endif
45		65	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		66
49	/* The next macro should declare a variable stacklevel that contains and approximation	67	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	68	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	69	* and should be unique. */
		70	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	71	#define STACKLEVEL ((void *)&stacklevel)
53		72
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	73	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		74
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	75	#if __GNUC__ >= 3
		76	# define attribute(x) __attribute__(x)
		77	#else
		78	# define attribute(x)
		79	#endif
		80
		81	#define NOINLINE attribute ((noinline))
57		82
58	#include "CoroAPI.h"	83	#include "CoroAPI.h"
		84
		85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		86
60	#ifdef USE_ITHREADS	87	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	88	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
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	AvFLAGS (av) = AVf_REIFY;
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);
		227
		228	return 0;
279	}	229	}
280		230
281	#define PERL_MAGIC_coro PERL_MAGIC_ext	231	#define PERL_MAGIC_coro PERL_MAGIC_ext
282		232
283	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
284		234
285	/* the next two functions merely cache the padlists */	235	/* the next two functions merely cache the padlists */
286	STATIC void	236	static void
287	get_padlist (pTHX_ CV *cv)	237	get_padlist (CV *cv)
288	{	238	{
289	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
290		240
291	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
292	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
293	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
294	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
295	}	255	}
296		256
297	STATIC void	257	static void
298	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
299	{	259	{
300	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301		261
302	if (!mg)	262	if (!mg)
303	{	263	{
…		…
311	}	271	}
312		272
313	#define SB do {	273	#define SB do {
314	#define SE } while (0)	274	#define SE } while (0)
315		275
316	#define LOAD(state) load_state(aTHX_ (state));	276	#define LOAD(state) load_state((state));
317	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	277	#define SAVE(state,flags) save_state((state),(flags));
318		278
319	#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
320		280
321	static void	281	static void
322	load_state(pTHX_ Coro__State c)	282	load_state(Coro__State c)
323	{	283	{
324	PL_dowarn = c->dowarn;	284	PL_dowarn = c->dowarn;
325	PL_in_eval = c->in_eval;	285	PL_in_eval = c->in_eval;
326		286
327	PL_curstackinfo = c->curstackinfo;	287	PL_curstackinfo = c->curstackinfo;
…		…
345	PL_scopestack_ix = c->scopestack_ix;	305	PL_scopestack_ix = c->scopestack_ix;
346	PL_scopestack_max = c->scopestack_max;	306	PL_scopestack_max = c->scopestack_max;
347	PL_savestack = c->savestack;	307	PL_savestack = c->savestack;
348	PL_savestack_ix = c->savestack_ix;	308	PL_savestack_ix = c->savestack_ix;
349	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
		310	#if !PERL_VERSION_ATLEAST (5,9,0)
350	PL_retstack = c->retstack;	311	PL_retstack = c->retstack;
351	PL_retstack_ix = c->retstack_ix;	312	PL_retstack_ix = c->retstack_ix;
352	PL_retstack_max = c->retstack_max;	313	PL_retstack_max = c->retstack_max;
		314	#endif
353	PL_curpm = c->curpm;	315	PL_curpm = c->curpm;
354	PL_curcop = c->curcop;	316	PL_curcop = c->curcop;
355	PL_top_env = c->top_env;
356		317
357	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
358	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
359	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
360		321
…		…
367	{	328	{
368	AV *padlist = (AV *)POPs;	329	AV *padlist = (AV *)POPs;
369		330
370	if (padlist)	331	if (padlist)
371	{	332	{
372	put_padlist (aTHX_ cv); /* mark this padlist as available */	333	put_padlist (cv); /* mark this padlist as available */
373	CvPADLIST(cv) = padlist;	334	CvPADLIST(cv) = padlist;
374	}	335	}
375		336
376	++CvDEPTH(cv);	337	++CvDEPTH(cv);
377	}	338	}
…		…
379	PUTBACK;	340	PUTBACK;
380	}	341	}
381	}	342	}
382		343
383	static void	344	static void
384	save_state(pTHX_ Coro__State c, int flags)	345	save_state(Coro__State c, int flags)
385	{	346	{
386	{	347	{
387	dSP;	348	dSP;
388	I32 cxix = cxstack_ix;	349	I32 cxix = cxstack_ix;
389	PERL_CONTEXT *ccstk = cxstack;	350	PERL_CONTEXT *ccstk = cxstack;
…		…
417	}	378	}
418		379
419	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST(cv));
420	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
421		382
422	get_padlist (aTHX_ cv); /* this is a monster */	383	get_padlist (cv);
423	}	384	}
424	}	385	}
425	#ifdef CXt_FORMAT	386	#ifdef CXt_FORMAT
426	else if (CxTYPE(cx) == CXt_FORMAT)	387	else if (CxTYPE(cx) == CXt_FORMAT)
427	{	388	{
…		…
471	c->scopestack_ix = PL_scopestack_ix;	432	c->scopestack_ix = PL_scopestack_ix;
472	c->scopestack_max = PL_scopestack_max;	433	c->scopestack_max = PL_scopestack_max;
473	c->savestack = PL_savestack;	434	c->savestack = PL_savestack;
474	c->savestack_ix = PL_savestack_ix;	435	c->savestack_ix = PL_savestack_ix;
475	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
		437	#if !PERL_VERSION_ATLEAST (5,9,0)
476	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
477	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
478	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
		441	#endif
479	c->curpm = PL_curpm;	442	c->curpm = PL_curpm;
480	c->curcop = PL_curcop;	443	c->curcop = PL_curcop;
481	c->top_env = PL_top_env;
482	}	444	}
483		445
484	/*	446	/*
485	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
486	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
487	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
488	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
489	*/	451	*/
490	STATIC void	452	static void
491	coro_init_stacks (pTHX)	453	coro_init_stacks ()
492	{	454	{
493	LOCK;
494
495	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
496	PL_curstackinfo->si_type = PERLSI_MAIN;	456	PL_curstackinfo->si_type = PERLSI_MAIN;
497	PL_curstack = PL_curstackinfo->si_stack;	457	PL_curstack = PL_curstackinfo->si_stack;
498	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499		459
…		…
520		480
521	New(54,PL_savestack,96,ANY);	481	New(54,PL_savestack,96,ANY);
522	PL_savestack_ix = 0;	482	PL_savestack_ix = 0;
523	PL_savestack_max = 96;	483	PL_savestack_max = 96;
524		484
		485	#if !PERL_VERSION_ATLEAST (5,9,0)
525	New(54,PL_retstack,8,OP*);	486	New(54,PL_retstack,8,OP*);
526	PL_retstack_ix = 0;	487	PL_retstack_ix = 0;
527	PL_retstack_max = 8;	488	PL_retstack_max = 8;
528		489	#endif
529	UNLOCK;
530	}	490	}
531		491
532	/*	492	/*
533	* destroy the stacks, the callchain etc...	493	* destroy the stacks, the callchain etc...
534	*/	494	*/
535	STATIC void	495	static void
536	destroy_stacks(pTHX)	496	destroy_stacks()
537	{	497	{
538	if (!IN_DESTRUCT)	498	if (!IN_DESTRUCT)
539	{	499	{
540	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
541	LEAVE_SCOPE (0);	501	LEAVE_SCOPE (0);
…		…
572		532
573	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
574	Safefree (PL_markstack);	534	Safefree (PL_markstack);
575	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
576	Safefree (PL_savestack);	536	Safefree (PL_savestack);
		537	#if !PERL_VERSION_ATLEAST (5,9,0)
577	Safefree (PL_retstack);	538	Safefree (PL_retstack);
578	}
579
580	static void
581	allocate_stack (Coro__State ctx, int alloc)
582	{
583	coro_stack *stack;
584
585	New (0, stack, 1, coro_stack);
586
587	stack->refcnt = 1;
588	stack->usecnt = 1;
589	stack->gencnt = ctx->gencnt = 0;
590
591	if (alloc)
592	{
593	#if HAVE_MMAP
594	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
595	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
596	if (stack->sptr == (void *)-1)
597	#endif	539	#endif
598	{
599	/*FIXME*//*D*//* reasonable stack size! */
600	stack->ssize = - (STACKSIZE * sizeof (long));
601	New (0, stack->sptr, STACKSIZE, long);
602	}
603	}
604	else
605	stack->sptr = 0;
606
607	ctx->stack = stack;
608	}	540	}
609		541
610	static void	542	static void
611	deallocate_stack (Coro__State ctx)	543	setup_coro (struct coro *coro)
612	{
613	coro_stack *stack = ctx->stack;
614
615	ctx->stack = 0;
616
617	if (stack)
618	{
619	if (!--stack->refcnt)
620	{
621	#ifdef HAVE_MMAP
622	if (stack->ssize > 0 && stack->sptr)
623	munmap (stack->sptr, stack->ssize);
624	else
625	#endif
626	Safefree (stack->sptr);
627
628	Safefree (stack);
629	}
630	else if (ctx->gencnt == stack->gencnt)
631	--stack->usecnt;
632	}
633	}
634
635	static void
636	setup_coro (void *arg)
637	{	544	{
638	/*	545	/*
639	* emulate part of the perl startup here.	546	* emulate part of the perl startup here.
640	*/	547	*/
641	dTHX;	548	dTHX;
642	dSP;	549	dSP;
643	Coro__State ctx = (Coro__State)arg;	550	UNOP myop;
644	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	551	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
645		552
646	coro_init_stacks (aTHX);	553	coro_init_stacks ();
647	/*PL_curcop = 0;*/	554	/*PL_curcop = 0;*/
648	/*PL_in_eval = PL_in_eval;*/ /* inherit */	555	/*PL_in_eval = PL_in_eval;*/ /* inherit */
649	SvREFCNT_dec (GvAV (PL_defgv));	556	SvREFCNT_dec (GvAV (PL_defgv));
650	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	557	GvAV (PL_defgv) = coro->args; coro->args = 0;
651		558
652	SPAGAIN;	559	SPAGAIN;
653		560
654	if (ctx->stack)
655	{
656	ctx->cursp = 0;
657
658	PUSHMARK(SP);
659	PUTBACK;
660	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
661
662	if (SvTRUE (ERRSV))
663	croak (NULL);
664	else
665	croak ("FATAL: CCTXT coroutine returned!");
666	}
667	else
668	{
669	UNOP myop;
670
671	PL_op = (OP *)&myop;
672
673	Zero(&myop, 1, UNOP);	561	Zero (&myop, 1, UNOP);
674	myop.op_next = Nullop;	562	myop.op_next = Nullop;
675	myop.op_flags = OPf_WANT_VOID;	563	myop.op_flags = OPf_WANT_VOID;
676		564
		565	PL_op = (OP *)&myop;
		566
677	PUSHMARK(SP);	567	PUSHMARK(SP);
678	XPUSHs (sub_init);	568	XPUSHs (sub_init);
679	/*
680	* the next line is slightly wrong, as PL_op->op_next
681	* is actually being executed so we skip the first op.
682	* that doesn't matter, though, since it is only
683	* pp_nextstate and we never return...
684	* ah yes, and I don't care anyways ;)
685	*/
686	PUTBACK;	569	PUTBACK;
687	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	570	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688	SPAGAIN;	571	SPAGAIN;
689		572
690	ENTER; /* necessary e.g. for dounwind */	573	ENTER; /* necessary e.g. for dounwind */
691	}
692	}	574	}
693		575
694	static void	576	static void
695	continue_coro (void *arg)	577	free_coro_mortal ()
696	{	578	{
697	/*
698	* this is a _very_ stripped down perl interpreter ;)
699	*/
700	dTHX;
701	Coro__State ctx = (Coro__State)arg;
702	JMPENV coro_start_env;
703
704	PL_top_env = &ctx->start_env;
705
706	ctx->cursp = 0;
707	PL_op = PL_op->op_next;
708	CALLRUNOPS(aTHX);
709
710	abort ();
711	}
712
713	STATIC void
714	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
715	{
716	dSTACKLEVEL;
717
718	if (prev != next)
719	{
720	if (next->mainstack)
721	{
722	LOCK;
723	SAVE (prev, flags);
724	LOAD (next);
725	UNLOCK;
726
727	/* mark this state as in-use */
728	next->mainstack = 0;
729	next->tmps_ix = -2;
730
731	/* stacklevel changed? if yes, grab the stack for us! */
732	if (flags & TRANSFER_SAVE_CCTXT)
733	{
734	if (!prev->stack)
735	allocate_stack (prev, 0);
736	else if (prev->cursp != stacklevel
737	&& prev->stack->usecnt > 1)
738	{
739	prev->gencnt = ++prev->stack->gencnt;
740	prev->stack->usecnt = 1;
741	}
742
743	/* has our stack been invalidated? */
744	if (next->stack && next->stack->gencnt != next->gencnt)
745	{
746	deallocate_stack (next);
747	allocate_stack (next, 1);
748	coro_create (&(next->stack->cctx),
749	continue_coro, (void *)next,
750	next->stack->sptr, labs (next->stack->ssize));
751	}
752
753	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
754	prev->cursp = stacklevel;
755	/* don't add any code here */
756	}
757	else
758	next->cursp = stacklevel;
759	}
760	else if (next->tmps_ix == -2)
761	croak ("tried to transfer to running coroutine");
762	else
763	{
764	LOCK;
765	SAVE (prev, -1); /* first get rid of the old state */
766	UNLOCK;
767
768	if (flags & TRANSFER_SAVE_CCTXT)
769	{
770	if (!prev->stack)
771	allocate_stack (prev, 0);
772
773	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
774	{
775	PL_top_env = &next->start_env;
776
777	setup_coro (next);
778	next->cursp = stacklevel;
779
780	prev->stack->refcnt++;
781	prev->stack->usecnt++;
782	next->stack = prev->stack;
783	next->gencnt = prev->gencnt;
784	}
785	else
786	{
787	assert (!next->stack);
788	allocate_stack (next, 1);
789	coro_create (&(next->stack->cctx),
790	setup_coro, (void *)next,
791	next->stack->sptr, labs (next->stack->ssize));
792	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
793	prev->cursp = stacklevel;
794	/* don't add any code here */
795	}
796	}
797	else
798	{
799	setup_coro (next);
800	next->cursp = stacklevel;
801	}
802	}
803	}
804
805	LOCK;
806	if (coro_mortal)	579	if (coro_mortal)
807	{	580	{
808	SvREFCNT_dec (coro_mortal);	581	SvREFCNT_dec (coro_mortal);
809	coro_mortal = 0;	582	coro_mortal = 0;
810	}	583	}
		584	}
		585
		586	static void NOINLINE
		587	prepare_cctx (coro_stack *cctx)
		588	{
		589	dSP;
		590	UNOP myop;
		591
		592	Zero (&myop, 1, UNOP);
		593	myop.op_next = PL_op;
		594	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		595
		596	PUSHMARK(SP);
		597	EXTEND (SP, 2);
		598	PUSHs (newSViv (PTR2IV (cctx)));
		599	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		600	PUTBACK;
		601	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		602	SPAGAIN;
		603	}
		604
		605	static void
		606	coro_run (void *arg)
		607	{
		608	/*
		609	* this is a _very_ stripped down perl interpreter ;)
		610	*/
811	UNLOCK;	611	UNLOCK;
812	}
813		612
814	#define SV_CORO(sv,func) \	613	PL_top_env = &PL_start_env;
815	do { \	614	prepare_cctx ((coro_stack *)arg);
816	if (SvROK (sv)) \
817	sv = SvRV (sv); \
818	\
819	if (SvTYPE (sv) == SVt_PVHV) \
820	{ \
821	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
822	\
823	if (!he) \
824	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
825	\
826	(sv) = SvRV (HeVAL(he)); \
827	} \
828	\
829	/* must also be changed inside Coro::Cont::yield */ \
830	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
831	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
832	\
833	} while(0)
834		615
835	#define SvSTATE(sv) (struct coro *)SvIV (sv)	616	/* somebody will hit me for both perl_run and PL_restartop */
		617	perl_run (PERL_GET_CONTEXT);
836		618
		619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		620	abort ();
		621	}
		622
		623	static coro_stack *
		624	stack_new ()
		625	{
		626	coro_stack *stack;
		627
		628	New (0, stack, 1, coro_stack);
		629
		630	#if HAVE_MMAP
		631
		632	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		633	/* mmap suppsedly does allocate-on-write for us */
		634	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		635
		636	if (stack->sptr == (void *)-1)
		637	{
		638	perror ("FATAL: unable to mmap stack for coroutine");
		639	_exit (EXIT_FAILURE);
		640	}
		641
		642	# if STACKGUARD
		643	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		644	# endif
		645
		646	#else
		647
		648	stack->ssize = STACKSIZE * (long)sizeof (long);
		649	New (0, stack->sptr, STACKSIZE, long);
		650
		651	if (!stack->sptr)
		652	{
		653	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		654	_exit (EXIT_FAILURE);
		655	}
		656
		657	#endif
		658
		659	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		660
		661	return stack;
		662	}
		663
		664	static void
		665	stack_free (coro_stack *stack)
		666	{
		667	if (!stack)
		668	return;
		669
		670	#if HAVE_MMAP
		671	munmap (stack->sptr, stack->ssize);
		672	#else
		673	Safefree (stack->sptr);
		674	#endif
		675
		676	Safefree (stack);
		677	}
		678
		679	static coro_stack *stack_first;
		680
		681	static coro_stack *
		682	stack_get ()
		683	{
		684	coro_stack *stack;
		685
		686	if (stack_first)
		687	{
		688	stack = stack_first;
		689	stack_first = stack->next;
		690	}
		691	else
		692	{
		693	stack = stack_new ();
		694	PL_op = PL_op->op_next;
		695	}
		696
		697	return stack;
		698	}
		699
		700	static void
		701	stack_put (coro_stack *stack)
		702	{
		703	stack->next = stack_first;
		704	stack_first = stack;
		705	}
		706
		707	/* never call directly, always through the coro_state_transfer global variable */
		708	static void NOINLINE
		709	transfer (struct coro *prev, struct coro *next, int flags)
		710	{
		711	dSTACKLEVEL;
		712
		713	/* sometimes transfer is only called to set idle_sp */
		714	if (flags == TRANSFER_SET_STACKLEVEL)
		715	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		716	else if (prev != next)
		717	{
		718	coro_stack *prev__stack;
		719
		720	LOCK;
		721
		722	if (next->mainstack)
		723	{
		724	/* coroutine already started */
		725	SAVE (prev, flags);
		726	LOAD (next);
		727	}
		728	else
		729	{
		730	/* need to start coroutine */
		731	/* first get rid of the old state */
		732	SAVE (prev, -1);
		733	/* setup coroutine call */
		734	setup_coro (next);
		735	/* need a stack */
		736	next->stack = 0;
		737	}
		738
		739	if (!prev->stack)
		740	/* create a new empty context */
		741	Newz (0, prev->stack, 1, coro_stack);
		742
		743	prev__stack = prev->stack;
		744
		745	/* possibly "free" the stack */
		746	if (prev__stack->idle_sp == STACKLEVEL)
		747	{
		748	stack_put (prev__stack);
		749	prev->stack = 0;
		750	}
		751
		752	if (!next->stack)
		753	next->stack = stack_get ();
		754
		755	if (prev__stack != next->stack)
		756	{
		757	prev__stack->top_env = PL_top_env;
		758	PL_top_env = next->stack->top_env;
		759	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		760	}
		761
		762	free_coro_mortal ();
		763
		764	UNLOCK;
		765	}
		766	}
		767
		768	struct transfer_args
		769	{
		770	struct coro *prev, *next;
		771	int flags;
		772	};
		773
		774	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		775
		776	static void
		777	coro_state_destroy (struct coro *coro)
		778	{
		779	if (coro->refcnt--)
		780	return;
		781
		782	if (coro->mainstack && coro->mainstack != main_mainstack)
		783	{
		784	struct coro temp;
		785
		786	SAVE ((&temp), TRANSFER_SAVE_ALL);
		787	LOAD (coro);
		788
		789	destroy_stacks ();
		790
		791	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		792
		793	coro->mainstack = 0;
		794	}
		795
		796	stack_free (coro->stack);
		797	SvREFCNT_dec (coro->args);
		798	Safefree (coro);
		799	}
		800
837	static void	801	static int
		802	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		803	{
		804	struct coro *coro = (struct coro *)mg->mg_ptr;
		805	mg->mg_ptr = 0;
		806
		807	coro_state_destroy (coro);
		808
		809	return 0;
		810	}
		811
		812	static int
		813	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		814	{
		815	struct coro *coro = (struct coro *)mg->mg_ptr;
		816
		817	++coro->refcnt;
		818
		819	return 0;
		820	}
		821
		822	static MGVTBL coro_state_vtbl = {
		823	0, 0, 0, 0,
		824	coro_state_clear,
		825	0,
		826	#ifdef MGf_DUP
		827	coro_state_dup,
		828	#endif
		829	};
		830
		831	static struct coro *
		832	SvSTATE (SV *coro)
		833	{
		834	HV *stash;
		835	MAGIC *mg;
		836
		837	if (SvROK (coro))
		838	coro = SvRV (coro);
		839
		840	stash = SvSTASH (coro);
		841	if (stash != coro_stash && stash != coro_state_stash)
		842	{
		843	/* very slow, but rare, check */
		844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		845	croak ("Coro::State object required");
		846	}
		847
		848	mg = SvMAGIC (coro);
		849	assert (mg->mg_type == PERL_MAGIC_ext);
		850	return (struct coro *)mg->mg_ptr;
		851	}
		852
		853	static void
		854	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		855	{
		856	ta->prev = SvSTATE (prev);
		857	ta->next = SvSTATE (next);
		858	ta->flags = flags;
		859	}
		860
		861	static void
838	api_transfer(pTHX_ SV *prev, SV *next, int flags)	862	api_transfer (SV *prev, SV *next, int flags)
839	{	863	{
840	SV_CORO (prev, "Coro::transfer");	864	dTHX;
841	SV_CORO (next, "Coro::transfer");	865	struct transfer_args ta;
842		866
843	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	867	prepare_transfer (&ta, prev, next, flags);
		868	TRANSFER (ta);
844	}	869	}
845		870
846	/** Coro ********************************************************************/	871	/** Coro ********************************************************************/
847		872
848	#define PRIO_MAX 3	873	#define PRIO_MAX 3
…		…
852	#define PRIO_IDLE -3	877	#define PRIO_IDLE -3
853	#define PRIO_MIN -4	878	#define PRIO_MIN -4
854		879
855	/* for Coro.pm */	880	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;	881	static GV *coro_current, *coro_idle;
857	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;	883	static int coro_nready;
859		884
860	static void	885	static void
861	coro_enq (pTHX_ SV *sv)	886	coro_enq (SV *sv)
862	{	887	{
		888	int prio;
		889
863	if (SvTYPE (sv) == SVt_PVHV)	890	if (SvTYPE (sv) != SVt_PVHV)
864	{
865	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
866	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
867
868	prio = prio > PRIO_MAX ? PRIO_MAX
869	: prio < PRIO_MIN ? PRIO_MIN
870	: prio;
871
872	av_push (coro_ready [prio - PRIO_MIN], sv);
873	coro_nready++;
874
875	return;
876	}
877
878	croak ("Coro::ready tried to enqueue something that is not a coroutine");	891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		892
		893	prio = SvSTATE (sv)->prio;
		894
		895	av_push (coro_ready [prio - PRIO_MIN], sv);
		896	coro_nready++;
879	}	897	}
880		898
881	static SV *	899	static SV *
882	coro_deq (pTHX_ int min_prio)	900	coro_deq (int min_prio)
883	{	901	{
884	int prio = PRIO_MAX - PRIO_MIN;	902	int prio = PRIO_MAX - PRIO_MIN;
885		903
886	min_prio -= PRIO_MIN;	904	min_prio -= PRIO_MIN;
887	if (min_prio < 0)	905	if (min_prio < 0)
888	min_prio = 0;	906	min_prio = 0;
889		907
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (av_len (coro_ready[prio]) >= 0)	909	if (AvFILLp (coro_ready [prio]) >= 0)
892	{	910	{
893	coro_nready--;	911	coro_nready--;
894	return av_shift (coro_ready[prio]);	912	return av_shift (coro_ready [prio]);
895	}	913	}
896		914
897	return 0;	915	return 0;
898	}	916	}
899		917
…		…
904		922
905	if (SvROK (coro))	923	if (SvROK (coro))
906	coro = SvRV (coro);	924	coro = SvRV (coro);
907		925
908	LOCK;	926	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	927	coro_enq (SvREFCNT_inc (coro));
910	UNLOCK;	928	UNLOCK;
911	}	929	}
912		930
913	static void	931	static void
		932	prepare_schedule (struct transfer_args *ta)
		933	{
		934	SV *current, *prev, *next;
		935
		936	current = GvSV (coro_current);
		937
		938	for (;;)
		939	{
		940	LOCK;
		941	next = coro_deq (PRIO_MIN);
		942	UNLOCK;
		943
		944	if (next)
		945	break;
		946
		947	{
		948	dSP;
		949
		950	ENTER;
		951	SAVETMPS;
		952
		953	PUSHMARK (SP);
		954	PUTBACK;
		955	call_sv (GvSV (coro_idle), G_DISCARD);
		956
		957	FREETMPS;
		958	LEAVE;
		959	}
		960	}
		961
		962	prev = SvRV (current);
		963	SvRV (current) = next;
		964
		965	/* free this only after the transfer */
		966	LOCK;
		967	free_coro_mortal ();
		968	UNLOCK;
		969	coro_mortal = prev;
		970
		971	ta->prev = SvSTATE (prev);
		972	ta->next = SvSTATE (next);
		973	ta->flags = TRANSFER_SAVE_ALL;
		974	}
		975
		976	static void
		977	prepare_cede (struct transfer_args *ta)
		978	{
		979	LOCK;
		980	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		981	UNLOCK;
		982
		983	prepare_schedule (ta);
		984	}
		985
		986	static void
914	api_schedule (void)	987	api_schedule (void)
915	{	988	{
916	dTHX;	989	dTHX;
		990	struct transfer_args ta;
917		991
918	SV *prev, *next;	992	prepare_schedule (&ta);
919		993	TRANSFER (ta);
920	LOCK;
921
922	prev = SvRV (GvSV (coro_current));
923	next = coro_deq (aTHX_ PRIO_MIN);
924
925	if (!next)
926	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
927
928	/* free this only after the transfer */
929	coro_mortal = prev;
930	SV_CORO (prev, "Coro::schedule");
931
932	SvRV (GvSV (coro_current)) = next;
933
934	SV_CORO (next, "Coro::schedule");
935
936	UNLOCK;
937
938	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
939	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
940	}	994	}
941		995
942	static void	996	static void
943	api_cede (void)	997	api_cede (void)
944	{	998	{
945	dTHX;	999	dTHX;
		1000	struct transfer_args ta;
946		1001
947	LOCK;	1002	prepare_cede (&ta);
948	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1003	TRANSFER (ta);
949	UNLOCK;
950
951	api_schedule ();
952	}	1004	}
953		1005
954	MODULE = Coro::State PACKAGE = Coro::State	1006	MODULE = Coro::State PACKAGE = Coro::State
955		1007
956	PROTOTYPES: ENABLE	1008	PROTOTYPES: DISABLE
957		1009
958	BOOT:	1010	BOOT:
959	{ /* {} necessary for stoopid perl-5.6.x */	1011	{
960	#ifdef USE_ITHREADS	1012	#ifdef USE_ITHREADS
961	MUTEX_INIT (&coro_mutex);	1013	MUTEX_INIT (&coro_mutex);
962	#endif	1014	#endif
		1015	BOOT_PAGESIZE;
963		1016
964	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
965	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1017	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1018
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1019	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1020	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1021	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
971	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
972		1022
973	main_mainstack = PL_mainstack;	1023	main_mainstack = PL_mainstack;
974		1024
975	coroapi.ver = CORO_API_VERSION;	1025	coroapi.ver = CORO_API_VERSION;
976	coroapi.transfer = api_transfer;	1026	coroapi.transfer = api_transfer;
977	}
978		1027
979	Coro::State	1028	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
980	_newprocess(args)	1029	}
981	SV * args	1030
982	PROTOTYPE: $	1031	SV *
		1032	new (char *klass, ...)
983	CODE:	1033	CODE:
984	Coro__State coro;	1034	{
		1035	struct coro *coro;
		1036	HV *hv;
		1037	int i;
985		1038
986	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
987	croak ("Coro::State::_newprocess expects an arrayref");
988
989	Newz (0, coro, 1, struct coro);	1039	Newz (0, coro, 1, struct coro);
		1040	coro->args = newAV ();
990		1041
991	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1042	hv = newHV ();
		1043	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1044	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1045
		1046	for (i = 1; i < items; i++)
		1047	av_push (coro->args, newSVsv (ST (i)));
		1048
992	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1049	/*coro->mainstack = 0; *//*actual work is done inside transfer */
993	/*coro->stack = 0;*/	1050	/*coro->stack = 0;*/
994		1051	}
995	/* same as JMPENV_BOOTSTRAP */
996	/* we might be able to recycle start_env, but safe is safe */
997	/*Zero(&coro->start_env, 1, JMPENV);*/
998	coro->start_env.je_ret = -1;
999	coro->start_env.je_mustcatch = TRUE;
1000
1001	RETVAL = coro;
1002	OUTPUT:	1052	OUTPUT:
1003	RETVAL	1053	RETVAL
1004		1054
1005	void	1055	void
1006	transfer(prev, next, flags)	1056	_set_stacklevel (...)
1007	SV *prev	1057	ALIAS:
1008	SV *next	1058	Coro::State::transfer = 1
1009	int flags	1059	Coro::schedule = 2
1010	PROTOTYPE: @	1060	Coro::cede = 3
		1061	Coro::Cont::yield = 4
1011	CODE:	1062	CODE:
1012	PUTBACK;	1063	{
1013	SV_CORO (next, "Coro::transfer");	1064	struct transfer_args ta;
1014	SV_CORO (prev, "Coro::transfer");	1065
1015	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1066	switch (ix)
1016	SPAGAIN;	1067	{
		1068	case 0:
		1069	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1070	ta.next = 0;
		1071	ta.flags = TRANSFER_SET_STACKLEVEL;
		1072	break;
		1073
		1074	case 1:
		1075	if (items != 3)
		1076	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1077
		1078	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1079	break;
		1080
		1081	case 2:
		1082	prepare_schedule (&ta);
		1083	break;
		1084
		1085	case 3:
		1086	prepare_cede (&ta);
		1087	break;
		1088
		1089	case 4:
		1090	{
		1091	SV *yieldstack;
		1092	SV *sv;
		1093	AV *defav = GvAV (PL_defgv);
		1094
		1095	yieldstack = *hv_fetch (
		1096	(HV *)SvRV (GvSV (coro_current)),
		1097	"yieldstack", sizeof ("yieldstack") - 1,
		1098	0
		1099	);
		1100
		1101	/* set up @_ -- ugly */
		1102	av_clear (defav);
		1103	av_fill (defav, items - 1);
		1104	while (items--)
		1105	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1106
		1107	sv = av_pop ((AV *)SvRV (yieldstack));
		1108	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1109	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1110	ta.flags = 0;
		1111	SvREFCNT_dec (sv);
		1112	}
		1113	break;
		1114
		1115	}
		1116
		1117	TRANSFER (ta);
		1118	}
1017		1119
1018	void	1120	void
1019	DESTROY(coro)	1121	_clone_state_from (SV *dst, SV *src)
1020	Coro::State coro	1122	CODE:
1021	CODE:	1123	{
		1124	struct coro *coro_src = SvSTATE (src);
1022		1125
1023	if (coro->mainstack && coro->mainstack != main_mainstack)	1126	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1024	{
1025	struct coro temp;
1026		1127
1027	PUTBACK;	1128	++coro_src->refcnt;
1028	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1129	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1029	LOAD (aTHX_ coro);	1130	}
1030	SPAGAIN;
1031
1032	destroy_stacks (aTHX);
1033
1034	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1035	SPAGAIN;
1036
1037	coro->mainstack = 0;
1038	}
1039
1040	deallocate_stack (coro);
1041	SvREFCNT_dec (coro->args);
1042	Safefree (coro);
1043		1131
1044	void	1132	void
1045	_exit(code)	1133	_exit (code)
1046	int code	1134	int code
1047	PROTOTYPE: $	1135	PROTOTYPE: $
1048	CODE:	1136	CODE:
1049	_exit (code);	1137	_exit (code);
1050		1138
1051	MODULE = Coro::State PACKAGE = Coro::Cont
1052
1053	# this is slightly dirty (should expose a c-level api)
1054
1055	void
1056	yield(...)
1057	PROTOTYPE: @
1058	CODE:
1059	SV *yieldstack;
1060	SV *sv;
1061	AV *defav = GvAV (PL_defgv);
1062	struct coro *prev, *next;
1063
1064	yieldstack = *hv_fetch (
1065	(HV *)SvRV (GvSV (coro_current)),
1066	"yieldstack", sizeof ("yieldstack") - 1,
1067	0
1068	);
1069
1070	/* set up @_ -- ugly */
1071	av_clear (defav);
1072	av_fill (defav, items - 1);
1073	while (items--)
1074	av_store (defav, items, SvREFCNT_inc (ST(items)));
1075
1076	sv = av_pop ((AV *)SvRV (yieldstack));
1077	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1078	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1079	SvREFCNT_dec (sv);
1080
1081	transfer (aTHX_ prev, next, 0);
1082
1083	MODULE = Coro::State PACKAGE = Coro	1139	MODULE = Coro::State PACKAGE = Coro
1084		1140
1085	# this is slightly dirty (should expose a c-level api)
1086
1087	BOOT:	1141	BOOT:
1088	{	1142	{
1089	int i;	1143	int i;
		1144
1090	HV *stash = gv_stashpv ("Coro", TRUE);	1145	coro_stash = gv_stashpv ("Coro", TRUE);
1091		1146
1092	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1147	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1093	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1148	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1094	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1149	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1095	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1150	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1096	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1151	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1097	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1152	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1098		1153
1099	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1154	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1100	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1155	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1101		1156
1102	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1157	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1110	coroapi.ready = api_ready;	1165	coroapi.ready = api_ready;
1111	coroapi.nready = &coro_nready;	1166	coroapi.nready = &coro_nready;
1112	coroapi.current = coro_current;	1167	coroapi.current = coro_current;
1113		1168
1114	GCoroAPI = &coroapi;	1169	GCoroAPI = &coroapi;
1115	sv_setiv(sv, (IV)&coroapi);	1170	sv_setiv (sv, (IV)&coroapi);
1116	SvREADONLY_on(sv);	1171	SvREADONLY_on (sv);
1117	}	1172	}
1118	}	1173	}
1119		1174
1120	#if !PERL_MICRO	1175	int
		1176	prio (Coro::State coro, int newprio = 0)
		1177	ALIAS:
		1178	nice = 1
		1179	CODE:
		1180	{
		1181	RETVAL = coro->prio;
		1182
		1183	if (items > 1)
		1184	{
		1185	if (ix)
		1186	newprio += coro->prio;
		1187
		1188	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1189	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1190
		1191	coro->prio = newprio;
		1192	}
		1193	}
1121		1194
1122	void	1195	void
1123	ready(self)	1196	ready (SV *self)
1124	SV * self
1125	PROTOTYPE: $	1197	PROTOTYPE: $
1126	CODE:	1198	CODE:
1127	api_ready (self);	1199	api_ready (self);
1128		1200
1129	#endif
1130
1131	int	1201	int
1132	nready(...)	1202	nready (...)
1133	PROTOTYPE:	1203	PROTOTYPE:
1134	CODE:	1204	CODE:
1135	RETVAL = coro_nready;	1205	RETVAL = coro_nready;
1136	OUTPUT:	1206	OUTPUT:
1137	RETVAL	1207	RETVAL
1138		1208
		1209	MODULE = Coro::State PACKAGE = Coro::AIO
		1210
		1211	SV *
		1212	_get_state ()
		1213	CODE:
		1214	{
		1215	struct {
		1216	int errorno;
		1217	int laststype;
		1218	int laststatval;
		1219	Stat_t statcache;
		1220	} data;
		1221
		1222	data.errorno = errno;
		1223	data.laststype = PL_laststype;
		1224	data.laststatval = PL_laststatval;
		1225	data.statcache = PL_statcache;
		1226
		1227	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1228	}
		1229	OUTPUT:
		1230	RETVAL
		1231
1139	void	1232	void
1140	schedule(...)	1233	_set_state (char *data_)
1141	PROTOTYPE:	1234	PROTOTYPE: $
1142	CODE:	1235	CODE:
1143	api_schedule ();	1236	{
		1237	struct {
		1238	int errorno;
		1239	int laststype;
		1240	int laststatval;
		1241	Stat_t statcache;
		1242	} *data = (void *)data_;
1144		1243
1145	void	1244	errno = data->errorno;
1146	cede(...)	1245	PL_laststype = data->laststype;
1147	PROTOTYPE:	1246	PL_laststatval = data->laststatval;
1148	CODE:	1247	PL_statcache = data->statcache;
1149	api_cede ();	1248	}
1150

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