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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 1.104 by root, Mon Nov 27 01:51:02 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	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	#define PERL_VERSION_ATLEAST(a,b,c) \
		14	(PERL_REVISION > (a) \
		15	|| (PERL_REVISION == (a) \
		16	&& (PERL_VERSION > (b) \
		17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		18
		19	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
14	# endif	22	# endif
15	# ifndef call_sv	23	# ifndef call_sv
16	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
29	# endif	37	# endif
30	#endif	38	#endif
31		39
32	#include <signal.h>	40	#include <stdio.h>
		41	#include <errno.h>
		42
		43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		44	# undef STACKGUARD
		45	#endif
		46
		47	#ifndef STACKGUARD
		48	# define STACKGUARD 0
		49	#endif
33		50
34	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
35	# include <unistd.h>	52	# include <unistd.h>
36	# include <sys/mman.h>	53	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
40	# else	57	# else
41	# undef HAVE_MMAP	58	# undef HAVE_MMAP
42	# endif	59	# endif
43	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE
44	#endif	68	# endif
45		69	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		70
49	/* The next macro should declare a variable stacklevel that contains and approximation	71	/* 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	72	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	73	* and should be unique. */
		74	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	75	#define STACKLEVEL ((void *)&stacklevel)
53		76
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	77	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		78
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	79	#if __GNUC__ >= 3
		80	# define attribute(x) __attribute__(x)
		81	#else
		82	# define attribute(x)
		83	#endif
		84
		85	#define NOINLINE attribute ((noinline))
57		86
58	#include "CoroAPI.h"	87	#include "CoroAPI.h"
		88
		89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		90
60	#ifdef USE_ITHREADS	91	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	92	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	93	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	94	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
66	# define UNLOCK (void)0	97	# define UNLOCK (void)0
67	#endif	98	#endif
68		99
69	static struct CoroAPI coroapi;	100	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	101	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	102	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 */	103	static SV *coro_mortal; /* will be freed after next transfer */
75		104
76	/* this is actually not only the c stack but also c registers etc... */	105	/* this is a structure representing a c-level coroutine */
77	typedef struct {	106	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	107	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		108
82	coro_context cctx;	109	/* the stack */
83
84	void *sptr;	110	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	111	long ssize; /* positive == mmap, otherwise malloc */
		112
		113	/* cpu state */
		114	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		115	JMPENV *top_env;
		116	coro_context cctx;
		117
		118	#if USE_VALGRIND
		119	int valgrind_id;
		120	#endif
86	} coro_stack;	121	} coro_stack;
87		122
		123	/* this is a structure representing a perl-level coroutine */
88	struct coro {	124	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	125	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	126	coro_stack *stack;
94	void *cursp;	127
		128	/* data associated with this coroutine (initial args) */
		129	AV *args;
95	int gencnt;	130	int refcnt;
96		131
97	/* optionally saved, might be zero */	132	/* optionally saved, might be zero */
98	AV *defav;	133	AV *defav;
99	SV *defsv;	134	SV *defsv;
100	SV *errsv;	135	SV *errsv;
…		…
130	OP **retstack;	165	OP **retstack;
131	I32 retstack_ix;	166	I32 retstack_ix;
132	I32 retstack_max;	167	I32 retstack_max;
133	PMOP *curpm;	168	PMOP *curpm;
134	COP *curcop;	169	COP *curcop;
135	JMPENV *top_env;
136		170
137	/* data associated with this coroutine (initial args) */	171	/* coro process data */
138	AV *args;	172	int prio;
139	};	173	};
140		174
141	typedef struct coro *Coro__State;	175	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	176	typedef struct coro *Coro__State_or_hashref;
143		177
144	/* mostly copied from op.c:cv_clone2 */	178	static AV *
145	STATIC AV *	179	coro_clone_padlist (CV *cv)
146	clone_padlist (pTHX_ AV *protopadlist)
147	{	180	{
148	AV *av;	181	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;	182	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		183
167	newpadlist = newAV ();	184	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	185	AvREAL_off (newpadlist);
169	av_store (newpadlist, 0, (SV *) newpad_name);	186	#if PERL_VERSION_ATLEAST (5,9,0)
		187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		188	#else
		189	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		190	#endif
		191	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		192	--AvFILLp (padlist);
		193
		194	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
170	av_store (newpadlist, 1, (SV *) newpad);	195	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		196
241	return newpadlist;	197	return newpadlist;
242	}	198	}
243		199
244	STATIC void	200	static void
245	free_padlist (pTHX_ AV *padlist)	201	free_padlist (AV *padlist)
246	{	202	{
247	/* may be during global destruction */	203	/* may be during global destruction */
248	if (SvREFCNT (padlist))	204	if (SvREFCNT (padlist))
249	{	205	{
250	I32 i = AvFILLp (padlist);	206	I32 i = AvFILLp (padlist);
…		…
263		219
264	SvREFCNT_dec ((SV*)padlist);	220	SvREFCNT_dec ((SV*)padlist);
265	}	221	}
266	}	222	}
267		223
268	STATIC int	224	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	225	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	226	{
271	AV *padlist;	227	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	228	AV *av = (AV *)mg->mg_obj;
273		229
274	/* casting is fun. */	230	/* casting is fun. */
275	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276	free_padlist (aTHX_ padlist);	232	free_padlist (padlist);
277		233
278	SvREFCNT_dec (av);	234	SvREFCNT_dec (av);
		235
		236	return 0;
279	}	237	}
280		238
281	#define PERL_MAGIC_coro PERL_MAGIC_ext	239	#define PERL_MAGIC_coro PERL_MAGIC_ext
282		240
283	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
284		242
285	/* the next two functions merely cache the padlists */	243	/* the next two functions merely cache the padlists */
286	STATIC void	244	static void
287	get_padlist (pTHX_ CV *cv)	245	get_padlist (CV *cv)
288	{	246	{
289	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
290		248
291	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
292	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	250	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
293	else	251	else
		252	{
		253	#if 0
		254	/* this is probably cleaner, but also slower? */
		255	CV *cp = Perl_cv_clone (cv);
		256	CvPADLIST (cv) = CvPADLIST (cp);
		257	CvPADLIST (cp) = 0;
		258	SvREFCNT_dec (cp);
		259	#else
294	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	260	CvPADLIST (cv) = coro_clone_padlist (cv);
		261	#endif
		262	}
295	}	263	}
296		264
297	STATIC void	265	static void
298	put_padlist (pTHX_ CV *cv)	266	put_padlist (CV *cv)
299	{	267	{
300	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	268	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301		269
302	if (!mg)	270	if (!mg)
303	{	271	{
…		…
311	}	279	}
312		280
313	#define SB do {	281	#define SB do {
314	#define SE } while (0)	282	#define SE } while (0)
315		283
316	#define LOAD(state) load_state(aTHX_ (state));	284	#define LOAD(state) load_state((state));
317	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	285	#define SAVE(state,flags) save_state((state),(flags));
318		286
319	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
320		288
321	static void	289	static void
322	load_state(pTHX_ Coro__State c)	290	load_state(Coro__State c)
323	{	291	{
324	PL_dowarn = c->dowarn;	292	PL_dowarn = c->dowarn;
325	PL_in_eval = c->in_eval;	293	PL_in_eval = c->in_eval;
326		294
327	PL_curstackinfo = c->curstackinfo;	295	PL_curstackinfo = c->curstackinfo;
…		…
345	PL_scopestack_ix = c->scopestack_ix;	313	PL_scopestack_ix = c->scopestack_ix;
346	PL_scopestack_max = c->scopestack_max;	314	PL_scopestack_max = c->scopestack_max;
347	PL_savestack = c->savestack;	315	PL_savestack = c->savestack;
348	PL_savestack_ix = c->savestack_ix;	316	PL_savestack_ix = c->savestack_ix;
349	PL_savestack_max = c->savestack_max;	317	PL_savestack_max = c->savestack_max;
		318	#if !PERL_VERSION_ATLEAST (5,9,0)
350	PL_retstack = c->retstack;	319	PL_retstack = c->retstack;
351	PL_retstack_ix = c->retstack_ix;	320	PL_retstack_ix = c->retstack_ix;
352	PL_retstack_max = c->retstack_max;	321	PL_retstack_max = c->retstack_max;
		322	#endif
353	PL_curpm = c->curpm;	323	PL_curpm = c->curpm;
354	PL_curcop = c->curcop;	324	PL_curcop = c->curcop;
355	PL_top_env = c->top_env;
356		325
357	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
358	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
359	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	328	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
360		329
…		…
367	{	336	{
368	AV *padlist = (AV *)POPs;	337	AV *padlist = (AV *)POPs;
369		338
370	if (padlist)	339	if (padlist)
371	{	340	{
372	put_padlist (aTHX_ cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
373	CvPADLIST(cv) = padlist;	342	CvPADLIST(cv) = padlist;
374	}	343	}
375		344
376	++CvDEPTH(cv);	345	++CvDEPTH(cv);
377	}	346	}
…		…
379	PUTBACK;	348	PUTBACK;
380	}	349	}
381	}	350	}
382		351
383	static void	352	static void
384	save_state(pTHX_ Coro__State c, int flags)	353	save_state(Coro__State c, int flags)
385	{	354	{
386	{	355	{
387	dSP;	356	dSP;
388	I32 cxix = cxstack_ix;	357	I32 cxix = cxstack_ix;
389	PERL_CONTEXT *ccstk = cxstack;	358	PERL_CONTEXT *ccstk = cxstack;
…		…
417	}	386	}
418		387
419	PUSHs ((SV *)CvPADLIST(cv));	388	PUSHs ((SV *)CvPADLIST(cv));
420	PUSHs ((SV *)cv);	389	PUSHs ((SV *)cv);
421		390
422	get_padlist (aTHX_ cv); /* this is a monster */	391	get_padlist (cv);
423	}	392	}
424	}	393	}
425	#ifdef CXt_FORMAT	394	#ifdef CXt_FORMAT
426	else if (CxTYPE(cx) == CXt_FORMAT)	395	else if (CxTYPE(cx) == CXt_FORMAT)
427	{	396	{
…		…
471	c->scopestack_ix = PL_scopestack_ix;	440	c->scopestack_ix = PL_scopestack_ix;
472	c->scopestack_max = PL_scopestack_max;	441	c->scopestack_max = PL_scopestack_max;
473	c->savestack = PL_savestack;	442	c->savestack = PL_savestack;
474	c->savestack_ix = PL_savestack_ix;	443	c->savestack_ix = PL_savestack_ix;
475	c->savestack_max = PL_savestack_max;	444	c->savestack_max = PL_savestack_max;
		445	#if !PERL_VERSION_ATLEAST (5,9,0)
476	c->retstack = PL_retstack;	446	c->retstack = PL_retstack;
477	c->retstack_ix = PL_retstack_ix;	447	c->retstack_ix = PL_retstack_ix;
478	c->retstack_max = PL_retstack_max;	448	c->retstack_max = PL_retstack_max;
		449	#endif
479	c->curpm = PL_curpm;	450	c->curpm = PL_curpm;
480	c->curcop = PL_curcop;	451	c->curcop = PL_curcop;
481	c->top_env = PL_top_env;
482	}	452	}
483		453
484	/*	454	/*
485	* allocate various perl stacks. This is an exact copy	455	* allocate various perl stacks. This is an exact copy
486	* of perl.c:init_stacks, except that it uses less memory	456	* of perl.c:init_stacks, except that it uses less memory
487	* on the (sometimes correct) assumption that coroutines do	457	* on the (sometimes correct) assumption that coroutines do
488	* not usually need a lot of stackspace.	458	* not usually need a lot of stackspace.
489	*/	459	*/
490	STATIC void	460	static void
491	coro_init_stacks (pTHX)	461	coro_init_stacks ()
492	{	462	{
493	LOCK;
494
495	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
496	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
497	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
498	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499		467
…		…
520		488
521	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,96,ANY);
522	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
523	PL_savestack_max = 96;	491	PL_savestack_max = 96;
524		492
		493	#if !PERL_VERSION_ATLEAST (5,9,0)
525	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,8,OP*);
526	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
527	PL_retstack_max = 8;	496	PL_retstack_max = 8;
528		497	#endif
529	UNLOCK;
530	}	498	}
531		499
532	/*	500	/*
533	* destroy the stacks, the callchain etc...	501	* destroy the stacks, the callchain etc...
534	*/	502	*/
535	STATIC void	503	static void
536	destroy_stacks(pTHX)	504	coro_destroy_stacks()
537	{	505	{
538	if (!IN_DESTRUCT)	506	if (!IN_DESTRUCT)
539	{	507	{
540	/* is this ugly, I ask? */	508	/* is this ugly, I ask? */
541	LEAVE_SCOPE (0);	509	LEAVE_SCOPE (0);
…		…
572		540
573	Safefree (PL_tmps_stack);	541	Safefree (PL_tmps_stack);
574	Safefree (PL_markstack);	542	Safefree (PL_markstack);
575	Safefree (PL_scopestack);	543	Safefree (PL_scopestack);
576	Safefree (PL_savestack);	544	Safefree (PL_savestack);
		545	#if !PERL_VERSION_ATLEAST (5,9,0)
577	Safefree (PL_retstack);	546	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	547	#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	}	548	}
609		549
610	static void	550	static void
611	deallocate_stack (Coro__State ctx)	551	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	{	552	{
638	/*	553	/*
639	* emulate part of the perl startup here.	554	* emulate part of the perl startup here.
640	*/	555	*/
641	dTHX;
642	dSP;
643	Coro__State ctx = (Coro__State)arg;
644	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
645		556
646	coro_init_stacks (aTHX);	557	coro_init_stacks ();
		558
647	/*PL_curcop = 0;*/	559	PL_curcop = 0;
648	/*PL_in_eval = PL_in_eval;*/ /* inherit */	560	PL_in_eval = 0;
		561	PL_curpm = 0;
		562
		563	{
		564	dSP;
		565	LOGOP myop;
		566
		567	/* I have no idea why this is needed, but it is */
		568	PUSHMARK (SP);
		569
649	SvREFCNT_dec (GvAV (PL_defgv));	570	SvREFCNT_dec (GvAV (PL_defgv));
650	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	571	GvAV (PL_defgv) = coro->args; coro->args = 0;
651		572
652	SPAGAIN;
653
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);	573	Zero (&myop, 1, LOGOP);
674	myop.op_next = Nullop;	574	myop.op_next = Nullop;
675	myop.op_flags = OPf_WANT_VOID;	575	myop.op_flags = OPf_WANT_VOID;
676		576
		577	PL_op = (OP *)&myop;
		578
677	PUSHMARK(SP);	579	PUSHMARK (SP);
678	XPUSHs (sub_init);	580	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
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;	581	PUTBACK;
687	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688	SPAGAIN;	583	SPAGAIN;
689		584
690	ENTER; /* necessary e.g. for dounwind */	585	ENTER; /* necessary e.g. for dounwind */
691	}	586	}
692	}	587	}
693		588
694	static void	589	static void
695	continue_coro (void *arg)	590	free_coro_mortal ()
696	{	591	{
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)	592	if (coro_mortal)
807	{	593	{
808	SvREFCNT_dec (coro_mortal);	594	SvREFCNT_dec (coro_mortal);
809	coro_mortal = 0;	595	coro_mortal = 0;
810	}	596	}
		597	}
		598
		599	static void NOINLINE
		600	prepare_cctx (coro_stack *cctx)
		601	{
		602	dSP;
		603	LOGOP myop;
		604
		605	Zero (&myop, 1, LOGOP);
		606	myop.op_next = PL_op;
		607	myop.op_flags = OPf_WANT_VOID;
		608
		609	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
		610
		611	PUSHMARK (SP);
		612	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		613	PUTBACK;
		614	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		615	SPAGAIN;
		616	}
		617
		618	static void
		619	coro_run (void *arg)
		620	{
		621	/* coro_run is the alternative epilogue of transfer() */
811	UNLOCK;	622	UNLOCK;
812	}
813		623
814	#define SV_CORO(sv,func) \	624	/*
815	do { \	625	* this is a _very_ stripped down perl interpreter ;)
816	if (SvROK (sv)) \	626	*/
817	sv = SvRV (sv); \	627	PL_top_env = &PL_start_env;
818	\	628	/* inject call to cctx_init */
819	if (SvTYPE (sv) == SVt_PVHV) \	629	prepare_cctx ((coro_stack *)arg);
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		630
835	#define SvSTATE(sv) (struct coro *)SvIV (sv)	631	/* somebody will hit me for both perl_run and PL_restartop */
		632	perl_run (PL_curinterp);
836		633
		634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		635	abort ();
		636	}
		637
		638	static coro_stack *
		639	stack_new ()
		640	{
		641	coro_stack *stack;
		642
		643	New (0, stack, 1, coro_stack);
		644
		645	#if HAVE_MMAP
		646
		647	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		648	/* mmap suppsedly does allocate-on-write for us */
		649	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		650
		651	if (stack->sptr == (void *)-1)
		652	{
		653	perror ("FATAL: unable to mmap stack for coroutine");
		654	_exit (EXIT_FAILURE);
		655	}
		656
		657	# if STACKGUARD
		658	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		659	# endif
		660
		661	#else
		662
		663	stack->ssize = STACKSIZE * (long)sizeof (long);
		664	New (0, stack->sptr, STACKSIZE, long);
		665
		666	if (!stack->sptr)
		667	{
		668	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		669	_exit (EXIT_FAILURE);
		670	}
		671
		672	#endif
		673
		674	#if USE_VALGRIND
		675	stack->valgrind_id = VALGRIND_STACK_REGISTER (
		676	STACKGUARD * PAGESIZE + (char *)stack->sptr,
		677	stack->ssize + (char *)stack->sptr
		678	);
		679	#endif
		680
		681	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		682
		683	return stack;
		684	}
		685
		686	static void
		687	stack_free (coro_stack *stack)
		688	{
		689	if (!stack)
		690	return;
		691
		692	#if USE_VALGRIND
		693	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
		694	#endif
		695
		696	#if HAVE_MMAP
		697	munmap (stack->sptr, stack->ssize);
		698	#else
		699	Safefree (stack->sptr);
		700	#endif
		701
		702	Safefree (stack);
		703	}
		704
		705	static coro_stack *stack_first;
		706	static int cctx_count, cctx_idle;
		707
		708	static coro_stack *
		709	stack_get ()
		710	{
		711	coro_stack *stack;
		712
		713	if (stack_first)
		714	{
		715	--cctx_idle;
		716	stack = stack_first;
		717	stack_first = stack->next;
		718	}
		719	else
		720	{
		721	++cctx_count;
		722	stack = stack_new ();
		723	PL_op = PL_op->op_next;
		724	}
		725
		726	return stack;
		727	}
		728
		729	static void
		730	stack_put (coro_stack *stack)
		731	{
		732	++cctx_idle;
		733	stack->next = stack_first;
		734	stack_first = stack;
		735	}
		736
		737	/* never call directly, always through the coro_state_transfer global variable */
		738	static void NOINLINE
		739	transfer (struct coro *prev, struct coro *next, int flags)
		740	{
		741	dSTACKLEVEL;
		742
		743	/* sometimes transfer is only called to set idle_sp */
		744	if (flags == TRANSFER_SET_STACKLEVEL)
		745	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		746	else if (prev != next)
		747	{
		748	coro_stack *prev__stack;
		749
		750	LOCK;
		751
		752	if (next->mainstack)
		753	{
		754	/* coroutine already started */
		755	SAVE (prev, flags);
		756	LOAD (next);
		757	}
		758	else
		759	{
		760	/* need to start coroutine */
		761	/* first get rid of the old state */
		762	SAVE (prev, -1);
		763	/* setup coroutine call */
		764	setup_coro (next);
		765	/* need a stack */
		766	next->stack = 0;
		767	}
		768
		769	if (!prev->stack)
		770	/* create a new empty context */
		771	Newz (0, prev->stack, 1, coro_stack);
		772
		773	prev__stack = prev->stack;
		774
		775	/* possibly "free" the stack */
		776	if (prev__stack->idle_sp == STACKLEVEL)
		777	{
		778	stack_put (prev__stack);
		779	prev->stack = 0;
		780	}
		781
		782	if (!next->stack)
		783	next->stack = stack_get ();
		784
		785	if (prev__stack != next->stack)
		786	{
		787	prev__stack->top_env = PL_top_env;
		788	PL_top_env = next->stack->top_env;
		789	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		790	}
		791
		792	free_coro_mortal ();
		793
		794	UNLOCK;
		795	}
		796	}
		797
		798	struct transfer_args
		799	{
		800	struct coro *prev, *next;
		801	int flags;
		802	};
		803
		804	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		805
		806	static void
		807	coro_state_destroy (struct coro *coro)
		808	{
		809	if (coro->refcnt--)
		810	return;
		811
		812	if (coro->mainstack && coro->mainstack != main_mainstack)
		813	{
		814	struct coro temp;
		815
		816	SAVE ((&temp), TRANSFER_SAVE_ALL);
		817	LOAD (coro);
		818
		819	coro_destroy_stacks ();
		820
		821	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		822
		823	coro->mainstack = 0;
		824	}
		825
		826	stack_free (coro->stack);
		827	SvREFCNT_dec (coro->args);
		828	Safefree (coro);
		829	}
		830
837	static void	831	static int
		832	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		833	{
		834	struct coro *coro = (struct coro *)mg->mg_ptr;
		835	mg->mg_ptr = 0;
		836
		837	coro_state_destroy (coro);
		838
		839	return 0;
		840	}
		841
		842	static int
		843	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		844	{
		845	struct coro *coro = (struct coro *)mg->mg_ptr;
		846
		847	++coro->refcnt;
		848
		849	return 0;
		850	}
		851
		852	static MGVTBL coro_state_vtbl = {
		853	0, 0, 0, 0,
		854	coro_state_clear,
		855	0,
		856	#ifdef MGf_DUP
		857	coro_state_dup,
		858	#else
		859	# define MGf_DUP 0
		860	#endif
		861	};
		862
		863	static struct coro *
		864	SvSTATE (SV *coro)
		865	{
		866	HV *stash;
		867	MAGIC *mg;
		868
		869	if (SvROK (coro))
		870	coro = SvRV (coro);
		871
		872	stash = SvSTASH (coro);
		873	if (stash != coro_stash && stash != coro_state_stash)
		874	{
		875	/* very slow, but rare, check */
		876	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		877	croak ("Coro::State object required");
		878	}
		879
		880	mg = SvMAGIC (coro);
		881	assert (mg->mg_type == PERL_MAGIC_ext);
		882	return (struct coro *)mg->mg_ptr;
		883	}
		884
		885	static void
		886	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		887	{
		888	ta->prev = SvSTATE (prev);
		889	ta->next = SvSTATE (next);
		890	ta->flags = flags;
		891	}
		892
		893	static void
838	api_transfer(pTHX_ SV *prev, SV *next, int flags)	894	api_transfer (SV *prev, SV *next, int flags)
839	{	895	{
840	SV_CORO (prev, "Coro::transfer");	896	dTHX;
841	SV_CORO (next, "Coro::transfer");	897	struct transfer_args ta;
842		898
843	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	899	prepare_transfer (&ta, prev, next, flags);
		900	TRANSFER (ta);
844	}	901	}
845		902
846	/** Coro ********************************************************************/	903	/** Coro ********************************************************************/
847		904
848	#define PRIO_MAX 3	905	#define PRIO_MAX 3
…		…
852	#define PRIO_IDLE -3	909	#define PRIO_IDLE -3
853	#define PRIO_MIN -4	910	#define PRIO_MIN -4
854		911
855	/* for Coro.pm */	912	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;	913	static GV *coro_current, *coro_idle;
857	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;	915	static int coro_nready;
859		916
860	static void	917	static void
861	coro_enq (pTHX_ SV *sv)	918	coro_enq (SV *sv)
862	{	919	{
		920	int prio;
		921
863	if (SvTYPE (sv) == SVt_PVHV)	922	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");	923	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		924
		925	prio = SvSTATE (sv)->prio;
		926
		927	av_push (coro_ready [prio - PRIO_MIN], sv);
		928	coro_nready++;
879	}	929	}
880		930
881	static SV *	931	static SV *
882	coro_deq (pTHX_ int min_prio)	932	coro_deq (int min_prio)
883	{	933	{
884	int prio = PRIO_MAX - PRIO_MIN;	934	int prio = PRIO_MAX - PRIO_MIN;
885		935
886	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
887	if (min_prio < 0)	937	if (min_prio < 0)
888	min_prio = 0;	938	min_prio = 0;
889		939
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
892	{	942	{
893	coro_nready--;	943	coro_nready--;
894	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
895	}	945	}
896		946
897	return 0;	947	return 0;
898	}	948	}
899		949
…		…
904		954
905	if (SvROK (coro))	955	if (SvROK (coro))
906	coro = SvRV (coro);	956	coro = SvRV (coro);
907		957
908	LOCK;	958	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	959	coro_enq (SvREFCNT_inc (coro));
910	UNLOCK;	960	UNLOCK;
911	}	961	}
912		962
913	static void	963	static void
		964	prepare_schedule (struct transfer_args *ta)
		965	{
		966	SV *current, *prev, *next;
		967
		968	current = GvSV (coro_current);
		969
		970	for (;;)
		971	{
		972	LOCK;
		973	next = coro_deq (PRIO_MIN);
		974	UNLOCK;
		975
		976	if (next)
		977	break;
		978
		979	{
		980	dSP;
		981
		982	ENTER;
		983	SAVETMPS;
		984
		985	PUSHMARK (SP);
		986	PUTBACK;
		987	call_sv (GvSV (coro_idle), G_DISCARD);
		988
		989	FREETMPS;
		990	LEAVE;
		991	}
		992	}
		993
		994	prev = SvRV (current);
		995	SvRV (current) = next;
		996
		997	/* free this only after the transfer */
		998	LOCK;
		999	free_coro_mortal ();
		1000	UNLOCK;
		1001	coro_mortal = prev;
		1002
		1003	ta->prev = SvSTATE (prev);
		1004	ta->next = SvSTATE (next);
		1005	ta->flags = TRANSFER_SAVE_ALL;
		1006	}
		1007
		1008	static void
		1009	prepare_cede (struct transfer_args *ta)
		1010	{
		1011	LOCK;
		1012	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1013	UNLOCK;
		1014
		1015	prepare_schedule (ta);
		1016	}
		1017
		1018	static void
914	api_schedule (void)	1019	api_schedule (void)
915	{	1020	{
916	dTHX;	1021	dTHX;
		1022	struct transfer_args ta;
917		1023
918	SV *prev, *next;	1024	prepare_schedule (&ta);
919		1025	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	}	1026	}
941		1027
942	static void	1028	static void
943	api_cede (void)	1029	api_cede (void)
944	{	1030	{
945	dTHX;	1031	dTHX;
		1032	struct transfer_args ta;
946		1033
947	LOCK;	1034	prepare_cede (&ta);
948	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1035	TRANSFER (ta);
949	UNLOCK;
950
951	api_schedule ();
952	}	1036	}
953		1037
954	MODULE = Coro::State PACKAGE = Coro::State	1038	MODULE = Coro::State PACKAGE = Coro::State
955		1039
956	PROTOTYPES: ENABLE	1040	PROTOTYPES: DISABLE
957		1041
958	BOOT:	1042	BOOT:
959	{ /* {} necessary for stoopid perl-5.6.x */	1043	{
960	#ifdef USE_ITHREADS	1044	#ifdef USE_ITHREADS
961	MUTEX_INIT (&coro_mutex);	1045	MUTEX_INIT (&coro_mutex);
962	#endif	1046	#endif
		1047	BOOT_PAGESIZE;
963		1048
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);	1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1050
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
971	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
972		1054
973	main_mainstack = PL_mainstack;	1055	main_mainstack = PL_mainstack;
974		1056
975	coroapi.ver = CORO_API_VERSION;	1057	coroapi.ver = CORO_API_VERSION;
976	coroapi.transfer = api_transfer;	1058	coroapi.transfer = api_transfer;
977	}
978		1059
979	Coro::State	1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
980	_newprocess(args)	1061	}
981	SV * args	1062
982	PROTOTYPE: $	1063	SV *
		1064	new (char *klass, ...)
983	CODE:	1065	CODE:
984	Coro__State coro;	1066	{
		1067	struct coro *coro;
		1068	HV *hv;
		1069	int i;
985		1070
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);	1071	Newz (0, coro, 1, struct coro);
		1072	coro->args = newAV ();
990		1073
991	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1074	hv = newHV ();
		1075	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1076	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1077
		1078	for (i = 1; i < items; i++)
		1079	av_push (coro->args, newSVsv (ST (i)));
		1080
992	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
993	/*coro->stack = 0;*/	1082	/*coro->stack = 0;*/
994		1083	}
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:	1084	OUTPUT:
1003	RETVAL	1085	RETVAL
1004		1086
1005	void	1087	void
1006	transfer(prev, next, flags)	1088	_set_stacklevel (...)
1007	SV *prev	1089	ALIAS:
1008	SV *next	1090	Coro::State::transfer = 1
1009	int flags	1091	Coro::schedule = 2
1010	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
1011	CODE:	1094	CODE:
1012	PUTBACK;	1095	{
1013	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
1014	SV_CORO (prev, "Coro::transfer");	1097
1015	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
1016	SPAGAIN;	1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1102	ta.next = 0;
		1103	ta.flags = TRANSFER_SET_STACKLEVEL;
		1104	break;
		1105
		1106	case 1:
		1107	if (items != 3)
		1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1109
		1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1111	break;
		1112
		1113	case 2:
		1114	prepare_schedule (&ta);
		1115	break;
		1116
		1117	case 3:
		1118	prepare_cede (&ta);
		1119	break;
		1120
		1121	case 4:
		1122	{
		1123	SV *yieldstack;
		1124	SV *sv;
		1125	AV *defav = GvAV (PL_defgv);
		1126
		1127	yieldstack = *hv_fetch (
		1128	(HV *)SvRV (GvSV (coro_current)),
		1129	"yieldstack", sizeof ("yieldstack") - 1,
		1130	0
		1131	);
		1132
		1133	/* set up @_ -- ugly */
		1134	av_clear (defav);
		1135	av_fill (defav, items - 1);
		1136	while (items--)
		1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1138
		1139	sv = av_pop ((AV *)SvRV (yieldstack));
		1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1142	ta.flags = 0;
		1143	SvREFCNT_dec (sv);
		1144	}
		1145	break;
		1146
		1147	}
		1148
		1149	TRANSFER (ta);
		1150	}
1017		1151
1018	void	1152	void
1019	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
1020	Coro::State coro	1154	CODE:
1021	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
1022		1157
1023	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1024	{
1025	struct coro temp;
1026		1159
1027	PUTBACK;	1160	++coro_src->refcnt;
1028	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1029	LOAD (aTHX_ coro);	1162	}
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		1163
1044	void	1164	void
1045	_exit(code)	1165	_exit (code)
1046	int code	1166	int code
1047	PROTOTYPE: $	1167	PROTOTYPE: $
1048	CODE:	1168	CODE:
1049	_exit (code);	1169	_exit (code);
1050		1170
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	1171	MODULE = Coro::State PACKAGE = Coro
1084		1172
1085	# this is slightly dirty (should expose a c-level api)
1086
1087	BOOT:	1173	BOOT:
1088	{	1174	{
1089	int i;	1175	int i;
		1176
1090	HV *stash = gv_stashpv ("Coro", TRUE);	1177	coro_stash = gv_stashpv ("Coro", TRUE);
1091		1178
1092	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1093	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1094	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1095	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1096	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1097	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1098		1185
1099	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1100	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1101		1188
1102	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1110	coroapi.ready = api_ready;	1197	coroapi.ready = api_ready;
1111	coroapi.nready = &coro_nready;	1198	coroapi.nready = &coro_nready;
1112	coroapi.current = coro_current;	1199	coroapi.current = coro_current;
1113		1200
1114	GCoroAPI = &coroapi;	1201	GCoroAPI = &coroapi;
1115	sv_setiv(sv, (IV)&coroapi);	1202	sv_setiv (sv, (IV)&coroapi);
1116	SvREADONLY_on(sv);	1203	SvREADONLY_on (sv);
1117	}	1204	}
1118	}	1205	}
1119		1206
1120	#if !PERL_MICRO	1207	int
		1208	prio (Coro::State coro, int newprio = 0)
		1209	ALIAS:
		1210	nice = 1
		1211	CODE:
		1212	{
		1213	RETVAL = coro->prio;
		1214
		1215	if (items > 1)
		1216	{
		1217	if (ix)
		1218	newprio += coro->prio;
		1219
		1220	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1221	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1222
		1223	coro->prio = newprio;
		1224	}
		1225	}
1121		1226
1122	void	1227	void
1123	ready(self)	1228	ready (SV *self)
1124	SV * self
1125	PROTOTYPE: $	1229	PROTOTYPE: $
1126	CODE:	1230	CODE:
1127	api_ready (self);	1231	api_ready (self);
1128		1232
1129	#endif
1130
1131	int	1233	int
1132	nready(...)	1234	nready (...)
1133	PROTOTYPE:	1235	PROTOTYPE:
1134	CODE:	1236	CODE:
1135	RETVAL = coro_nready;	1237	RETVAL = coro_nready;
1136	OUTPUT:	1238	OUTPUT:
1137	RETVAL	1239	RETVAL
1138		1240
		1241	MODULE = Coro::State PACKAGE = Coro::AIO
		1242
		1243	SV *
		1244	_get_state ()
		1245	CODE:
		1246	{
		1247	struct {
		1248	int errorno;
		1249	int laststype;
		1250	int laststatval;
		1251	Stat_t statcache;
		1252	} data;
		1253
		1254	data.errorno = errno;
		1255	data.laststype = PL_laststype;
		1256	data.laststatval = PL_laststatval;
		1257	data.statcache = PL_statcache;
		1258
		1259	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1260	}
		1261	OUTPUT:
		1262	RETVAL
		1263
1139	void	1264	void
1140	schedule(...)	1265	_set_state (char *data_)
1141	PROTOTYPE:	1266	PROTOTYPE: $
1142	CODE:	1267	CODE:
1143	api_schedule ();	1268	{
		1269	struct {
		1270	int errorno;
		1271	int laststype;
		1272	int laststatval;
		1273	Stat_t statcache;
		1274	} *data = (void *)data_;
1144		1275
1145	void	1276	errno = data->errorno;
1146	cede(...)	1277	PL_laststype = data->laststype;
1147	PROTOTYPE:	1278	PL_laststatval = data->laststatval;
1148	CODE:	1279	PL_statcache = data->statcache;
1149	api_cede ();	1280	}
1150

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