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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.71 by root, Wed Jan 25 21:43:58 2006 UTC vs.
Revision 1.113 by root, Thu Nov 30 20:54:24 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
		40	#include <stdio.h>
32	#include <errno.h>	41	#include <errno.h>
33	#include <signal.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
34		50
35	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
36	# include <unistd.h>	52	# include <unistd.h>
37	# include <sys/mman.h>	53	# include <sys/mman.h>
38	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
40	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
41	# else	57	# else
42	# undef HAVE_MMAP	58	# undef HAVE_MMAP
43	# endif	59	# endif
44	# 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 (void)0
45	#endif	68	# endif
46		69	#else
47	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
48	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
49		73
50	/* The next macro should declare a variable stacklevel that contains and approximation	74	/* The next macro should declare a variable stacklevel that contains and approximation
51	* to the current C stack pointer. Its property is that it changes with each call	75	* to the current C stack pointer. Its property is that it changes with each call
52	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
54		79
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		81
57	#define labs(l) ((l) >= 0 ? (l) : -(l))	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
58		89
59	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
60		93
61	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
63	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
67	# define UNLOCK (void)0	100	# define UNLOCK (void)0
68	#endif	101	#endif
69		102
70	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
71	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
72	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
73	static SV *ucoro_state_sv;
74	static U32 ucoro_state_hash;
75	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
76		107
77	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
78	typedef struct {	112	typedef struct coro_cctx {
79	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
80	int usecnt; /* shared by how many coroutines */
81	int gencnt; /* generation counter */
82		114
83	coro_context cctx;	115	/* the stack */
84
85	void *sptr;	116	void *sptr;
86	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
87	} coro_stack;
88		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	int inuse;
		125
		126	#if USE_VALGRIND
		127	int valgrind_id;
		128	#endif
		129	} coro_cctx;
		130
		131	enum {
		132	CF_RUNNING, /* coroutine is running */
		133	CF_READY, /* coroutine is ready */
		134	};
		135
		136	/* this is a structure representing a perl-level coroutine */
89	struct coro {	137	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	138	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;	139	coro_cctx *cctx;
92		140
93	/* the optional C context */	141	/* data associated with this coroutine (initial args) */
94	coro_stack *stack;	142	AV *args;
95	void *cursp;
96	int gencnt;	143	int refcnt;
		144	int flags;
97		145
98	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
99	AV *defav;	147	AV *defav;
100	SV *defsv;	148	SV *defsv;
101	SV *errsv;	149	SV *errsv;
102		150
103	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
104	U8 dowarn;	152	# include "state.h"
105	I32 in_eval;	153	#undef VAR
106		154
107	/* the stacks and related info (callchain etc..) */	155	/* coro process data */
108	PERL_SI *curstackinfo;	156	int prio;
109	AV *curstack;
110	AV *mainstack;
111	SV **stack_sp;
112	OP *op;
113	SV **curpad;
114	AV *comppad;
115	CV *compcv;
116	SV **stack_base;
117	SV **stack_max;
118	SV **tmps_stack;
119	I32 tmps_floor;
120	I32 tmps_ix;
121	I32 tmps_max;
122	I32 *markstack;
123	I32 *markstack_ptr;
124	I32 *markstack_max;
125	I32 *scopestack;
126	I32 scopestack_ix;
127	I32 scopestack_max;
128	ANY *savestack;
129	I32 savestack_ix;
130	I32 savestack_max;
131	OP **retstack;
132	I32 retstack_ix;
133	I32 retstack_max;
134	PMOP *curpm;
135	COP *curcop;
136	JMPENV *top_env;
137
138	/* data associated with this coroutine (initial args) */
139	AV *args;
140	};	157	};
141		158
142	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
144		161
145	/* mostly copied from op.c:cv_clone2 */	162	static AV *
146	STATIC AV *	163	coro_clone_padlist (CV *cv)
147	clone_padlist (pTHX_ AV *protopadlist)
148	{	164	{
149	AV *av;	165	AV *padlist = CvPADLIST (cv);
150	I32 ix;
151	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
152	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
153	SV **pname = AvARRAY (protopad_name);
154	SV **ppad = AvARRAY (protopad);
155	I32 fname = AvFILLp (protopad_name);
156	I32 fpad = AvFILLp (protopad);
157	AV *newpadlist, *newpad_name, *newpad;	166	AV *newpadlist, *newpad;
158	SV **npad;
159
160	newpad_name = newAV ();
161	for (ix = fname; ix >= 0; ix--)
162	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164	newpad = newAV ();
165	av_fill (newpad, AvFILLp (protopad));
166	npad = AvARRAY (newpad);
167		167
168	newpadlist = newAV ();	168	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
170	av_store (newpadlist, 0, (SV *) newpad_name);	170	#if PERL_VERSION_ATLEAST (5,9,0)
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		172	#else
		173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		174	#endif
		175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		176	--AvFILLp (padlist);
		177
		178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171	av_store (newpadlist, 1, (SV *) newpad);	179	av_store (newpadlist, 1, (SV *)newpad);
172
173	av = newAV (); /* will be @_ */
174	av_extend (av, 0);
175	av_store (newpad, 0, (SV *) av);
176	AvREIFY_on (av);
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char *name = SvPVX (namesv); /* XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV *kid = cv_clone((CV*)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		180
242	return newpadlist;	181	return newpadlist;
243	}	182	}
244		183
245	STATIC void	184	static void
246	free_padlist (pTHX_ AV *padlist)	185	free_padlist (AV *padlist)
247	{	186	{
248	/* may be during global destruction */	187	/* may be during global destruction */
249	if (SvREFCNT (padlist))	188	if (SvREFCNT (padlist))
250	{	189	{
251	I32 i = AvFILLp (padlist);	190	I32 i = AvFILLp (padlist);
…		…
264		203
265	SvREFCNT_dec ((SV*)padlist);	204	SvREFCNT_dec ((SV*)padlist);
266	}	205	}
267	}	206	}
268		207
269	STATIC int	208	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	209	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	210	{
272	AV *padlist;	211	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	212	AV *av = (AV *)mg->mg_obj;
274		213
275	/* casting is fun. */	214	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	216	free_padlist (padlist);
278		217
279	SvREFCNT_dec (av);	218	SvREFCNT_dec (av);
		219
		220	return 0;
280	}	221	}
281		222
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		224
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		226
		227	#define CORO_MAGIC(cv) \
		228	SvMAGIC (cv) \
		229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		230	? SvMAGIC (cv) \
		231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		232	: 0
		233
286	/* the next two functions merely cache the padlists */	234	/* the next two functions merely cache the padlists */
287	STATIC void	235	static void
288	get_padlist (pTHX_ CV *cv)	236	get_padlist (CV *cv)
289	{	237	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
291		240
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294	else	243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
296	}	255	}
297		256
298	STATIC void	257	static void
299	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
300	{	259	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
302		262
303	if (!mg)	263	if (!mg)
304	{	264	{
305	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307	mg->mg_virtual = &vtbl_coro;	267	mg->mg_virtual = &vtbl_coro;
308	mg->mg_obj = (SV *)newAV ();	268	mg->mg_obj = (SV *)newAV ();
309	}	269	}
310		270
311	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	271	av = (AV *)mg->mg_obj;
		272
		273	if (AvFILLp (av) >= AvMAX (av))
		274	av_extend (av, AvMAX (av) + 1);
		275
		276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
312	}	277	}
313		278
314	#define SB do {	279	#define SB do {
315	#define SE } while (0)	280	#define SE } while (0)
316		281
317	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
319		284
320	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
321		286
322	static void	287	static void
323	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
324	{	289	{
325	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
326	PL_in_eval = c->in_eval;	291	# include "state.h"
327		292	#undef VAR
328	PL_curstackinfo = c->curstackinfo;
329	PL_curstack = c->curstack;
330	PL_mainstack = c->mainstack;
331	PL_stack_sp = c->stack_sp;
332	PL_op = c->op;
333	PL_curpad = c->curpad;
334	PL_comppad = c->comppad;
335	PL_compcv = c->compcv;
336	PL_stack_base = c->stack_base;
337	PL_stack_max = c->stack_max;
338	PL_tmps_stack = c->tmps_stack;
339	PL_tmps_floor = c->tmps_floor;
340	PL_tmps_ix = c->tmps_ix;
341	PL_tmps_max = c->tmps_max;
342	PL_markstack = c->markstack;
343	PL_markstack_ptr = c->markstack_ptr;
344	PL_markstack_max = c->markstack_max;
345	PL_scopestack = c->scopestack;
346	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;
351	#ifdef PL_retstack
352	PL_retstack = c->retstack;
353	PL_retstack_ix = c->retstack_ix;
354	PL_retstack_max = c->retstack_max;
355	#endif
356	PL_curpm = c->curpm;
357	PL_curcop = c->curcop;
358	PL_top_env = c->top_env;
359		293
360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
363		297
…		…
366	CV *cv;	300	CV *cv;
367		301
368	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
369	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
370	{	304	{
371	AV *padlist = (AV *)POPs;
372
373	if (padlist)
374	{
375	put_padlist (aTHX_ cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
376	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
377	}	307	CvPADLIST (cv) = (AV *)POPs;
378
379	++CvDEPTH(cv);
380	}	308	}
381		309
382	PUTBACK;	310	PUTBACK;
383	}	311	}
384	}	312	}
385		313
386	static void	314	static void
387	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
388	{	316	{
389	{	317	{
390	dSP;	318	dSP;
391	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
392	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
406	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
407		335
408	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
409	{	337	{
410	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
411	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
412	{	341	{
413	EXTEND (SP, CvDEPTH(cv)*2);	342	EXTEND (SP, 3);
414
415	while (--CvDEPTH(cv))
416	{
417	/* this tells the restore code to increment CvDEPTH */
418	PUSHs (Nullsv);
419	PUSHs ((SV *)cv);
420	}
421		343
422	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
423	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
424		347
425	get_padlist (aTHX_ cv); /* this is a monster */	348	CvDEPTH (cv) = 0;
		349	get_padlist (cv);
426	}	350	}
427	}	351	}
428	#ifdef CXt_FORMAT	352	#ifdef CXt_FORMAT
429	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
430	{	354	{
…		…
448		372
449	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
450	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
451	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
452		376
453	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
454	c->in_eval = PL_in_eval;	378	# include "state.h"
455		379	#undef VAR
456	c->curstackinfo = PL_curstackinfo;
457	c->curstack = PL_curstack;
458	c->mainstack = PL_mainstack;
459	c->stack_sp = PL_stack_sp;
460	c->op = PL_op;
461	c->curpad = PL_curpad;
462	c->comppad = PL_comppad;
463	c->compcv = PL_compcv;
464	c->stack_base = PL_stack_base;
465	c->stack_max = PL_stack_max;
466	c->tmps_stack = PL_tmps_stack;
467	c->tmps_floor = PL_tmps_floor;
468	c->tmps_ix = PL_tmps_ix;
469	c->tmps_max = PL_tmps_max;
470	c->markstack = PL_markstack;
471	c->markstack_ptr = PL_markstack_ptr;
472	c->markstack_max = PL_markstack_max;
473	c->scopestack = PL_scopestack;
474	c->scopestack_ix = PL_scopestack_ix;
475	c->scopestack_max = PL_scopestack_max;
476	c->savestack = PL_savestack;
477	c->savestack_ix = PL_savestack_ix;
478	c->savestack_max = PL_savestack_max;
479	#ifdef PL_retstack
480	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;
483	#endif
484	c->curpm = PL_curpm;
485	c->curcop = PL_curcop;
486	c->top_env = PL_top_env;
487	}	380	}
488		381
489	/*	382	/*
490	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
491	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
492	* on the (sometimes correct) assumption that coroutines do	385	* on the (sometimes correct) assumption that coroutines do
493	* not usually need a lot of stackspace.	386	* not usually need a lot of stackspace.
494	*/	387	*/
495	STATIC void	388	static void
496	coro_init_stacks (pTHX)	389	coro_init_stacks ()
497	{	390	{
498	LOCK;
499
500	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
502	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
503	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504		395
…		…
525		416
526	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
527	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
528	PL_savestack_max = 96;	419	PL_savestack_max = 96;
529		420
530	#ifdef PL_retstack	421	#if !PERL_VERSION_ATLEAST (5,9,0)
531	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
532	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
533	PL_retstack_max = 8;	424	PL_retstack_max = 8;
534	#endif	425	#endif
535
536	UNLOCK;
537	}	426	}
538		427
539	/*	428	/*
540	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
541	*/	430	*/
542	STATIC void	431	static void
543	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
544	{	433	{
545	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
546	{	435	{
547	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
548	LEAVE_SCOPE (0);	437	LEAVE_SCOPE (0);
…		…
579		468
580	Safefree (PL_tmps_stack);	469	Safefree (PL_tmps_stack);
581	Safefree (PL_markstack);	470	Safefree (PL_markstack);
582	Safefree (PL_scopestack);	471	Safefree (PL_scopestack);
583	Safefree (PL_savestack);	472	Safefree (PL_savestack);
584	#ifdef PL_retstack	473	#if !PERL_VERSION_ATLEAST (5,9,0)
585	Safefree (PL_retstack);	474	Safefree (PL_retstack);
586	#endif	475	#endif
587	}	476	}
588		477
589	static void	478	static void
590	allocate_stack (Coro__State ctx, int alloc)	479	setup_coro (struct coro *coro)
591	{
592	coro_stack *stack;
593
594	New (0, stack, 1, coro_stack);
595
596	stack->refcnt = 1;
597	stack->usecnt = 1;
598	stack->gencnt = ctx->gencnt = 0;
599
600	if (alloc)
601	{
602	#if HAVE_MMAP
603	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605	if (stack->sptr == (void *)-1)
606	#endif
607	{
608	/*FIXME*//*D*//* reasonable stack size! */
609	stack->ssize = - (STACKSIZE * sizeof (long));
610	New (0, stack->sptr, STACKSIZE, long);
611	}
612	}
613	else
614	stack->sptr = 0;
615
616	ctx->stack = stack;
617	}
618
619	static void
620	deallocate_stack (Coro__State ctx)
621	{
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{
628	if (!--stack->refcnt)
629	{
630	#ifdef HAVE_MMAP
631	if (stack->ssize > 0 && stack->sptr)
632	munmap (stack->sptr, stack->ssize);
633	else
634	#endif
635	Safefree (stack->sptr);
636
637	Safefree (stack);
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}
643
644	static void
645	setup_coro (void *arg)
646	{	480	{
647	/*	481	/*
648	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
649	*/	483	*/
650	dTHX;
651	dSP;
652	Coro__State ctx = (Coro__State)arg;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654		484
655	coro_init_stacks (aTHX);	485	coro_init_stacks ();
		486
656	/*PL_curcop = 0;*/	487	PL_curcop = 0;
657	/*PL_in_eval = PL_in_eval;*/ /* inherit */	488	PL_in_eval = 0;
		489	PL_curpm = 0;
		490
		491	{
		492	dSP;
		493	LOGOP myop;
		494
		495	/* I have no idea why this is needed, but it is */
		496	PUSHMARK (SP);
		497
658	SvREFCNT_dec (GvAV (PL_defgv));	498	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	499	GvAV (PL_defgv) = coro->args; coro->args = 0;
660		500
661	SPAGAIN;
662
663	if (ctx->stack)
664	{
665	ctx->cursp = 0;
666
667	PUSHMARK(SP);
668	PUTBACK;
669	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671	if (SvTRUE (ERRSV))
672	croak (NULL);
673	else
674	croak ("FATAL: CCTXT coroutine returned!");
675	}
676	else
677	{
678	UNOP myop;
679
680	PL_op = (OP *)&myop;
681
682	Zero(&myop, 1, UNOP);	501	Zero (&myop, 1, LOGOP);
683	myop.op_next = Nullop;	502	myop.op_next = Nullop;
684	myop.op_flags = OPf_WANT_VOID;	503	myop.op_flags = OPf_WANT_VOID;
685		504
		505	PL_op = (OP *)&myop;
		506
686	PUSHMARK(SP);	507	PUSHMARK (SP);
687	XPUSHs (sub_init);	508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
688	/*
689	* the next line is slightly wrong, as PL_op->op_next
690	* is actually being executed so we skip the first op.
691	* that doesn't matter, though, since it is only
692	* pp_nextstate and we never return...
693	* ah yes, and I don't care anyways ;)
694	*/
695	PUTBACK;	509	PUTBACK;
696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697	SPAGAIN;	511	SPAGAIN;
698		512
699	ENTER; /* necessary e.g. for dounwind */	513	ENTER; /* necessary e.g. for dounwind */
700	}	514	}
701	}	515	}
702		516
703	static void	517	static void
704	continue_coro (void *arg)	518	free_coro_mortal ()
705	{	519	{
706	/*
707	* this is a _very_ stripped down perl interpreter ;)
708	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711	JMPENV coro_start_env;
712
713	PL_top_env = &ctx->start_env;
714
715	ctx->cursp = 0;
716	PL_op = PL_op->op_next;
717	CALLRUNOPS(aTHX);
718
719	abort ();
720	}
721
722	STATIC void
723	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724	{
725	dSTACKLEVEL;
726
727	if (prev != next)
728	{
729	if (next->mainstack)
730	{
731	LOCK;
732	SAVE (prev, flags);
733	LOAD (next);
734	UNLOCK;
735
736	/* mark this state as in-use */
737	next->mainstack = 0;
738	next->tmps_ix = -2;
739
740	/* stacklevel changed? if yes, grab the stack for us! */
741	if (flags & TRANSFER_SAVE_CCTXT)
742	{
743	if (!prev->stack)
744	allocate_stack (prev, 0);
745	else if (prev->cursp != stacklevel
746	&& prev->stack->usecnt > 1)
747	{
748	prev->gencnt = ++prev->stack->gencnt;
749	prev->stack->usecnt = 1;
750	}
751
752	/* has our stack been invalidated? */
753	if (next->stack && next->stack->gencnt != next->gencnt)
754	{
755	deallocate_stack (next);
756	allocate_stack (next, 1);
757	coro_create (&(next->stack->cctx),
758	continue_coro, (void *)next,
759	next->stack->sptr, labs (next->stack->ssize));
760	}
761
762	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763	prev->cursp = stacklevel;
764	/* don't add any code here */
765	}
766	else
767	next->cursp = stacklevel;
768	}
769	else if (next->tmps_ix == -2)
770	croak ("tried to transfer to running coroutine");
771	else
772	{
773	LOCK;
774	SAVE (prev, -1); /* first get rid of the old state */
775	UNLOCK;
776
777	if (flags & TRANSFER_SAVE_CCTXT)
778	{
779	if (!prev->stack)
780	allocate_stack (prev, 0);
781
782	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783	{
784	PL_top_env = &next->start_env;
785
786	setup_coro (next);
787	next->cursp = stacklevel;
788
789	prev->stack->refcnt++;
790	prev->stack->usecnt++;
791	next->stack = prev->stack;
792	next->gencnt = prev->gencnt;
793	}
794	else
795	{
796	assert (!next->stack);
797	allocate_stack (next, 1);
798	coro_create (&(next->stack->cctx),
799	setup_coro, (void *)next,
800	next->stack->sptr, labs (next->stack->ssize));
801	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802	prev->cursp = stacklevel;
803	/* don't add any code here */
804	}
805	}
806	else
807	{
808	setup_coro (next);
809	next->cursp = stacklevel;
810	}
811	}
812	}
813
814	LOCK;
815	if (coro_mortal)	520	if (coro_mortal)
816	{	521	{
817	SvREFCNT_dec (coro_mortal);	522	SvREFCNT_dec (coro_mortal);
818	coro_mortal = 0;	523	coro_mortal = 0;
819	}	524	}
		525	}
		526
		527	static void NOINLINE
		528	prepare_cctx (coro_cctx *cctx)
		529	{
		530	dSP;
		531	LOGOP myop;
		532
		533	Zero (&myop, 1, LOGOP);
		534	myop.op_next = PL_op;
		535	myop.op_flags = OPf_WANT_VOID;
		536
		537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		538
		539	PUSHMARK (SP);
		540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		541	PUTBACK;
		542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		543	SPAGAIN;
		544	}
		545
		546	static void
		547	coro_run (void *arg)
		548	{
		549	/* coro_run is the alternative epilogue of transfer() */
820	UNLOCK;	550	UNLOCK;
821	}
822		551
823	#define SV_CORO(sv,func) \	552	/*
824	do { \	553	* this is a _very_ stripped down perl interpreter ;)
825	if (SvROK (sv)) \	554	*/
826	sv = SvRV (sv); \	555	PL_top_env = &PL_start_env;
827	\
828	if (SvTYPE (sv) == SVt_PVHV) \
829	{ \
830	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831	\
832	if (!he) \
833	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834	\
835	(sv) = SvRV (HeVAL(he)); \
836	} \
837	\
838	/* must also be changed inside Coro::Cont::yield */ \
839	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841	\
842	} while(0)
843		556
844	#define SvSTATE(sv) (struct coro *)SvIV (sv)	557	/* inject call to cctx_init */
		558	prepare_cctx ((coro_cctx *)arg);
845		559
		560	/* somebody will hit me for both perl_run and PL_restartop */
		561	perl_run (PL_curinterp);
		562
		563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		564	abort ();
		565	}
		566
		567	static coro_cctx *
		568	cctx_new ()
		569	{
		570	coro_cctx *cctx;
		571
		572	++cctx_count;
		573
		574	New (0, cctx, 1, coro_cctx);
		575
		576	#if HAVE_MMAP
		577
		578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		579	/* mmap suppsedly does allocate-on-write for us */
		580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		581
		582	if (cctx->sptr == (void *)-1)
		583	{
		584	perror ("FATAL: unable to mmap stack for coroutine");
		585	_exit (EXIT_FAILURE);
		586	}
		587
		588	# if STACKGUARD
		589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		590	# endif
		591
		592	#else
		593
		594	cctx->ssize = STACKSIZE * (long)sizeof (long);
		595	New (0, cctx->sptr, STACKSIZE, long);
		596
		597	if (!cctx->sptr)
		598	{
		599	perror ("FATAL: unable to malloc stack for coroutine");
		600	_exit (EXIT_FAILURE);
		601	}
		602
		603	#endif
		604
		605	#if USE_VALGRIND
		606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		608	cctx->ssize + (char *)cctx->sptr
		609	);
		610	#endif
		611
		612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		613
		614	return cctx;
		615	}
		616
		617	static void
		618	cctx_free (coro_cctx *cctx)
		619	{
		620	if (!cctx)
		621	return;
		622
		623	--cctx_count;
		624
		625	#if USE_VALGRIND
		626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		627	#endif
		628
		629	#if HAVE_MMAP
		630	munmap (cctx->sptr, cctx->ssize);
		631	#else
		632	Safefree (cctx->sptr);
		633	#endif
		634
		635	Safefree (cctx);
		636	}
		637
		638	static coro_cctx *
		639	cctx_get ()
		640	{
		641	coro_cctx *cctx;
		642
		643	if (cctx_first)
		644	{
		645	--cctx_idle;
		646	cctx = cctx_first;
		647	cctx_first = cctx->next;
		648	}
		649	else
		650	{
		651	cctx = cctx_new ();
		652	PL_op = PL_op->op_next;
		653	}
		654
		655	return cctx;
		656	}
		657
		658	static void
		659	cctx_put (coro_cctx *cctx)
		660	{
		661	++cctx_idle;
		662	cctx->next = cctx_first;
		663	cctx_first = cctx;
		664	}
		665
		666	/* never call directly, always through the coro_state_transfer global variable */
		667	static void NOINLINE
		668	transfer (struct coro *prev, struct coro *next, int flags)
		669	{
		670	dSTACKLEVEL;
		671
		672	/* sometimes transfer is only called to set idle_sp */
		673	if (flags == TRANSFER_SET_STACKLEVEL)
		674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		675	else if (prev != next)
		676	{
		677	coro_cctx *prev__cctx;
		678
		679	if (!prev->cctx)
		680	{
		681	/* create a new empty context */
		682	Newz (0, prev->cctx, 1, coro_cctx);
		683	prev->cctx->inuse = 1;
		684	prev->flags |= CF_RUNNING;
		685	}
		686
		687	if (!prev->flags & CF_RUNNING)
		688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		689
		690	if (next->flags & CF_RUNNING)
		691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		692
		693	prev->flags &= ~CF_RUNNING;
		694	next->flags |= CF_RUNNING;
		695
		696	LOCK;
		697
		698	if (next->mainstack)
		699	{
		700	/* coroutine already started */
		701	SAVE (prev, flags);
		702	LOAD (next);
		703	}
		704	else
		705	{
		706	/* need to start coroutine */
		707	/* first get rid of the old state */
		708	SAVE (prev, -1);
		709	/* setup coroutine call */
		710	setup_coro (next);
		711	/* need a new stack */
		712	assert (!next->stack);
		713	}
		714
		715	prev__cctx = prev->cctx;
		716
		717	/* possibly "free" the cctx */
		718	if (prev__cctx->idle_sp == STACKLEVEL)
		719	{
		720	assert (PL_top_env == prev__cctx->top_env);
		721
		722	cctx_put (prev__cctx);
		723	prev->cctx = 0;
		724	}
		725	else if (prev__cctx->idle_sp) //D
		726	fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D
		727
		728	if (!next->cctx)
		729	next->cctx = cctx_get ();
		730
		731	if (prev__cctx != next->cctx)
		732	{
		733	assert ( prev__cctx->inuse);
		734	assert (!next->cctx->inuse);
		735
		736	prev__cctx->inuse = 0;
		737	next->cctx->inuse = 1;
		738
		739	prev__cctx->top_env = PL_top_env;
		740	PL_top_env = next->cctx->top_env;
		741	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		742	}
		743
		744	free_coro_mortal ();
		745
		746	UNLOCK;
		747	}
		748	}
		749
		750	struct transfer_args
		751	{
		752	struct coro *prev, *next;
		753	int flags;
		754	};
		755
		756	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		757
		758	static void
		759	coro_state_destroy (struct coro *coro)
		760	{
		761	if (coro->refcnt--)
		762	return;
		763
		764	if (coro->flags & CF_RUNNING)
		765	croak ("FATAL: tried to destroy currently running coroutine");
		766
		767	if (coro->mainstack && coro->mainstack != main_mainstack)
		768	{
		769	struct coro temp;
		770
		771	SAVE ((&temp), TRANSFER_SAVE_ALL);
		772	LOAD (coro);
		773
		774	coro_destroy_stacks ();
		775
		776	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		777
		778	coro->mainstack = 0;
		779	}
		780
		781	cctx_free (coro->cctx);
		782	SvREFCNT_dec (coro->args);
		783	Safefree (coro);
		784	}
		785
846	static void	786	static int
		787	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		788	{
		789	struct coro *coro = (struct coro *)mg->mg_ptr;
		790	mg->mg_ptr = 0;
		791
		792	coro_state_destroy (coro);
		793
		794	return 0;
		795	}
		796
		797	static int
		798	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		799	{
		800	struct coro *coro = (struct coro *)mg->mg_ptr;
		801
		802	++coro->refcnt;
		803
		804	return 0;
		805	}
		806
		807	static MGVTBL coro_state_vtbl = {
		808	0, 0, 0, 0,
		809	coro_state_clear,
		810	0,
		811	#ifdef MGf_DUP
		812	coro_state_dup,
		813	#else
		814	# define MGf_DUP 0
		815	#endif
		816	};
		817
		818	static struct coro *
		819	SvSTATE (SV *coro)
		820	{
		821	HV *stash;
		822	MAGIC *mg;
		823
		824	if (SvROK (coro))
		825	coro = SvRV (coro);
		826
		827	stash = SvSTASH (coro);
		828	if (stash != coro_stash && stash != coro_state_stash)
		829	{
		830	/* very slow, but rare, check */
		831	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		832	croak ("Coro::State object required");
		833	}
		834
		835	mg = SvMAGIC (coro);
		836	assert (mg->mg_type == PERL_MAGIC_ext);
		837	return (struct coro *)mg->mg_ptr;
		838	}
		839
		840	static void
		841	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		842	{
		843	ta->prev = SvSTATE (prev);
		844	ta->next = SvSTATE (next);
		845	ta->flags = flags;
		846	}
		847
		848	static void
847	api_transfer(pTHX_ SV *prev, SV *next, int flags)	849	api_transfer (SV *prev, SV *next, int flags)
848	{	850	{
849	SV_CORO (prev, "Coro::transfer");	851	dTHX;
850	SV_CORO (next, "Coro::transfer");	852	struct transfer_args ta;
851		853
852	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	854	prepare_transfer (&ta, prev, next, flags);
		855	TRANSFER (ta);
853	}	856	}
854		857
855	/** Coro ********************************************************************/	858	/** Coro ********************************************************************/
856		859
857	#define PRIO_MAX 3	860	#define PRIO_MAX 3
…		…
861	#define PRIO_IDLE -3	864	#define PRIO_IDLE -3
862	#define PRIO_MIN -4	865	#define PRIO_MIN -4
863		866
864	/* for Coro.pm */	867	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;	868	static GV *coro_current, *coro_idle;
866	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;	870	static int coro_nready;
868		871
869	static void	872	static void
870	coro_enq (pTHX_ SV *sv)	873	coro_enq (SV *coro_sv)
871	{	874	{
872	if (SvTYPE (sv) == SVt_PVHV)
873	{
874	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
875	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
876
877	prio = prio > PRIO_MAX ? PRIO_MAX
878	: prio < PRIO_MIN ? PRIO_MIN
879	: prio;
880
881	av_push (coro_ready [prio - PRIO_MIN], sv);	875	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
882	coro_nready++;	876	coro_nready++;
883
884	return;
885	}
886
887	croak ("Coro::ready tried to enqueue something that is not a coroutine");
888	}	877	}
889		878
890	static SV *	879	static SV *
891	coro_deq (pTHX_ int min_prio)	880	coro_deq (int min_prio)
892	{	881	{
893	int prio = PRIO_MAX - PRIO_MIN;	882	int prio = PRIO_MAX - PRIO_MIN;
894		883
895	min_prio -= PRIO_MIN;	884	min_prio -= PRIO_MIN;
896	if (min_prio < 0)	885	if (min_prio < 0)
897	min_prio = 0;	886	min_prio = 0;
898		887
899	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
900	if (av_len (coro_ready[prio]) >= 0)	889	if (AvFILLp (coro_ready [prio]) >= 0)
901	{	890	{
902	coro_nready--;	891	coro_nready--;
903	return av_shift (coro_ready[prio]);	892	return av_shift (coro_ready [prio]);
904	}	893	}
905		894
906	return 0;	895	return 0;
907	}	896	}
908		897
909	static void	898	static int
910	api_ready (SV *coro)	899	api_ready (SV *coro_sv)
		900	{
		901	struct coro *coro;
		902
		903	if (SvROK (coro_sv))
		904	coro_sv = SvRV (coro_sv);
		905
		906	coro = SvSTATE (coro_sv);
		907
		908	if (coro->flags & CF_READY)
		909	return 0;
		910
		911	if (coro->flags & CF_RUNNING)
		912	croak ("Coro::ready called on currently running coroutine");
		913
		914	coro->flags |= CF_READY;
		915
		916	LOCK;
		917	coro_enq (SvREFCNT_inc (coro_sv));
		918	UNLOCK;
		919
		920	return 1;
		921	}
		922
		923	static int
		924	api_is_ready (SV *coro_sv)
		925	{
		926	return !!SvSTATE (coro_sv)->flags & CF_READY;
		927	}
		928
		929	static void
		930	prepare_schedule (struct transfer_args *ta)
		931	{
		932	SV *current, *prev, *next;
		933
		934	current = GvSV (coro_current);
		935
		936	for (;;)
		937	{
		938	LOCK;
		939	next = coro_deq (PRIO_MIN);
		940	UNLOCK;
		941
		942	if (next)
		943	break;
		944
		945	{
		946	dSP;
		947
		948	ENTER;
		949	SAVETMPS;
		950
		951	PUSHMARK (SP);
		952	PUTBACK;
		953	call_sv (GvSV (coro_idle), G_DISCARD);
		954
		955	FREETMPS;
		956	LEAVE;
		957	}
		958	}
		959
		960	prev = SvRV (current);
		961	SvRV (current) = next;
		962
		963	/* free this only after the transfer */
		964	LOCK;
		965	free_coro_mortal ();
		966	UNLOCK;
		967	coro_mortal = prev;
		968
		969	ta->prev = SvSTATE (prev);
		970	ta->next = SvSTATE (next);
		971	ta->flags = TRANSFER_SAVE_ALL;
		972
		973	ta->next->flags &= ~CF_READY;
		974	}
		975
		976	static void
		977	prepare_cede (struct transfer_args *ta)
		978	{
		979	api_ready (GvSV (coro_current));
		980
		981	prepare_schedule (ta);
		982	}
		983
		984	static void
		985	api_schedule (void)
911	{	986	{
912	dTHX;	987	dTHX;
		988	struct transfer_args ta;
913		989
914	if (SvROK (coro))	990	prepare_schedule (&ta);
915	coro = SvRV (coro);	991	TRANSFER (ta);
916
917	LOCK;
918	coro_enq (aTHX_ SvREFCNT_inc (coro));
919	UNLOCK;
920	}	992	}
921		993
922	static void	994	static void
923	api_schedule (void)	995	api_cede (void)
924	{	996	{
925	dTHX;	997	dTHX;
		998	struct transfer_args ta;
926		999
927	SV *prev, *next;	1000	prepare_cede (&ta);
928		1001	TRANSFER (ta);
929	LOCK;
930
931	prev = SvRV (GvSV (coro_current));
932	next = coro_deq (aTHX_ PRIO_MIN);
933
934	if (!next)
935	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
936
937	/* free this only after the transfer */
938	coro_mortal = prev;
939	SV_CORO (prev, "Coro::schedule");
940
941	SvRV (GvSV (coro_current)) = next;
942
943	SV_CORO (next, "Coro::schedule");
944
945	UNLOCK;
946
947	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
948	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
949	}
950
951	static void
952	api_cede (void)
953	{
954	dTHX;
955
956	LOCK;
957	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
958	UNLOCK;
959
960	api_schedule ();
961	}	1002	}
962		1003
963	MODULE = Coro::State PACKAGE = Coro::State	1004	MODULE = Coro::State PACKAGE = Coro::State
964		1005
965	PROTOTYPES: ENABLE	1006	PROTOTYPES: DISABLE
966		1007
967	BOOT:	1008	BOOT:
968	{ /* {} necessary for stoopid perl-5.6.x */	1009	{
969	#ifdef USE_ITHREADS	1010	#ifdef USE_ITHREADS
970	MUTEX_INIT (&coro_mutex);	1011	MUTEX_INIT (&coro_mutex);
971	#endif	1012	#endif
		1013	BOOT_PAGESIZE;
972		1014
973	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
974	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
975	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1015	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
976		1016
977	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1017	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
978	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1018	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
979	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1019	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
980	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
981		1020
982	main_mainstack = PL_mainstack;	1021	main_mainstack = PL_mainstack;
983		1022
984	coroapi.ver = CORO_API_VERSION;	1023	coroapi.ver = CORO_API_VERSION;
985	coroapi.transfer = api_transfer;	1024	coroapi.transfer = api_transfer;
986	}
987		1025
988	Coro::State	1026	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
989	_newprocess(args)	1027	}
990	SV * args	1028
991	PROTOTYPE: $	1029	SV *
		1030	new (char *klass, ...)
992	CODE:	1031	CODE:
993	Coro__State coro;	1032	{
		1033	struct coro *coro;
		1034	HV *hv;
		1035	int i;
994		1036
995	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
996	croak ("Coro::State::_newprocess expects an arrayref");
997
998	Newz (0, coro, 1, struct coro);	1037	Newz (0, coro, 1, struct coro);
		1038	coro->args = newAV ();
999		1039
1000	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1040	hv = newHV ();
1001	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1041	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1002	/*coro->stack = 0;*/	1042	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1003		1043
1004	/* same as JMPENV_BOOTSTRAP */	1044	for (i = 1; i < items; i++)
1005	/* we might be able to recycle start_env, but safe is safe */	1045	av_push (coro->args, newSVsv (ST (i)));
1006	/*Zero(&coro->start_env, 1, JMPENV);*/	1046	}
1007	coro->start_env.je_ret = -1;
1008	coro->start_env.je_mustcatch = TRUE;
1009
1010	RETVAL = coro;
1011	OUTPUT:	1047	OUTPUT:
1012	RETVAL	1048	RETVAL
1013		1049
1014	void	1050	void
1015	transfer(prev, next, flags)	1051	_set_stacklevel (...)
1016	SV *prev	1052	ALIAS:
1017	SV *next	1053	Coro::State::transfer = 1
1018	int flags	1054	Coro::schedule = 2
1019	PROTOTYPE: @	1055	Coro::cede = 3
		1056	Coro::Cont::yield = 4
1020	CODE:	1057	CODE:
1021	PUTBACK;	1058	{
1022	SV_CORO (next, "Coro::transfer");	1059	struct transfer_args ta;
1023	SV_CORO (prev, "Coro::transfer");	1060
1024	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1061	switch (ix)
1025	SPAGAIN;	1062	{
		1063	case 0:
		1064	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1065	ta.next = 0;
		1066	ta.flags = TRANSFER_SET_STACKLEVEL;
		1067	break;
		1068
		1069	case 1:
		1070	if (items != 3)
		1071	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1072
		1073	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1074	break;
		1075
		1076	case 2:
		1077	prepare_schedule (&ta);
		1078	break;
		1079
		1080	case 3:
		1081	prepare_cede (&ta);
		1082	break;
		1083
		1084	case 4:
		1085	{
		1086	SV *yieldstack;
		1087	SV *sv;
		1088	AV *defav = GvAV (PL_defgv);
		1089
		1090	yieldstack = *hv_fetch (
		1091	(HV *)SvRV (GvSV (coro_current)),
		1092	"yieldstack", sizeof ("yieldstack") - 1,
		1093	0
		1094	);
		1095
		1096	/* set up @_ -- ugly */
		1097	av_clear (defav);
		1098	av_fill (defav, items - 1);
		1099	while (items--)
		1100	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1101
		1102	sv = av_pop ((AV *)SvRV (yieldstack));
		1103	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1104	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1105	ta.flags = 0;
		1106	SvREFCNT_dec (sv);
		1107	}
		1108	break;
		1109
		1110	}
		1111
		1112	TRANSFER (ta);
		1113	}
1026		1114
1027	void	1115	void
1028	DESTROY(coro)	1116	_clone_state_from (SV *dst, SV *src)
1029	Coro::State coro	1117	CODE:
1030	CODE:	1118	{
		1119	struct coro *coro_src = SvSTATE (src);
1031		1120
1032	if (coro->mainstack && coro->mainstack != main_mainstack)	1121	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1033	{
1034	struct coro temp;
1035		1122
1036	PUTBACK;	1123	++coro_src->refcnt;
1037	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1124	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1038	LOAD (aTHX_ coro);	1125	}
1039	SPAGAIN;
1040
1041	destroy_stacks (aTHX);
1042
1043	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1044	SPAGAIN;
1045
1046	coro->mainstack = 0;
1047	}
1048
1049	deallocate_stack (coro);
1050	SvREFCNT_dec (coro->args);
1051	Safefree (coro);
1052		1126
1053	void	1127	void
1054	_exit(code)	1128	_exit (code)
1055	int code	1129	int code
1056	PROTOTYPE: $	1130	PROTOTYPE: $
1057	CODE:	1131	CODE:
1058	_exit (code);	1132	_exit (code);
1059		1133
1060	MODULE = Coro::State PACKAGE = Coro::Cont	1134	int
		1135	cctx_count ()
		1136	CODE:
		1137	RETVAL = cctx_count;
		1138	OUTPUT:
		1139	RETVAL
1061		1140
1062	# this is slightly dirty (should expose a c-level api)	1141	int
1063		1142	cctx_idle ()
1064	void	1143	CODE:
1065	yield(...)	1144	RETVAL = cctx_idle;
1066	PROTOTYPE: @	1145	OUTPUT:
1067	CODE:	1146	RETVAL
1068	SV *yieldstack;
1069	SV *sv;
1070	AV *defav = GvAV (PL_defgv);
1071	struct coro *prev, *next;
1072
1073	yieldstack = *hv_fetch (
1074	(HV *)SvRV (GvSV (coro_current)),
1075	"yieldstack", sizeof ("yieldstack") - 1,
1076	0
1077	);
1078
1079	/* set up @_ -- ugly */
1080	av_clear (defav);
1081	av_fill (defav, items - 1);
1082	while (items--)
1083	av_store (defav, items, SvREFCNT_inc (ST(items)));
1084
1085	sv = av_pop ((AV *)SvRV (yieldstack));
1086	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1087	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1088	SvREFCNT_dec (sv);
1089
1090	transfer (aTHX_ prev, next, 0);
1091		1147
1092	MODULE = Coro::State PACKAGE = Coro	1148	MODULE = Coro::State PACKAGE = Coro
1093		1149
1094	# this is slightly dirty (should expose a c-level api)
1095
1096	BOOT:	1150	BOOT:
1097	{	1151	{
1098	int i;	1152	int i;
		1153
1099	HV *stash = gv_stashpv ("Coro", TRUE);	1154	coro_stash = gv_stashpv ("Coro", TRUE);
1100		1155
1101	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1156	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1102	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1157	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1103	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1158	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1104	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1159	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1105	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1160	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1106	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1161	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1107		1162
1108	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1163	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1109	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1164	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1110		1165
1111	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1166	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1115	SV *sv = perl_get_sv("Coro::API", 1);	1170	SV *sv = perl_get_sv("Coro::API", 1);
1116		1171
1117	coroapi.schedule = api_schedule;	1172	coroapi.schedule = api_schedule;
1118	coroapi.cede = api_cede;	1173	coroapi.cede = api_cede;
1119	coroapi.ready = api_ready;	1174	coroapi.ready = api_ready;
		1175	coroapi.is_ready = api_is_ready;
1120	coroapi.nready = &coro_nready;	1176	coroapi.nready = &coro_nready;
1121	coroapi.current = coro_current;	1177	coroapi.current = coro_current;
1122		1178
1123	GCoroAPI = &coroapi;	1179	GCoroAPI = &coroapi;
1124	sv_setiv(sv, (IV)&coroapi);	1180	sv_setiv (sv, (IV)&coroapi);
1125	SvREADONLY_on(sv);	1181	SvREADONLY_on (sv);
1126	}	1182	}
1127	}	1183	}
1128		1184
1129	#if !PERL_MICRO	1185	int
		1186	prio (Coro::State coro, int newprio = 0)
		1187	ALIAS:
		1188	nice = 1
		1189	CODE:
		1190	{
		1191	RETVAL = coro->prio;
1130		1192
1131	void	1193	if (items > 1)
		1194	{
		1195	if (ix)
		1196	newprio += coro->prio;
		1197
		1198	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1199	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1200
		1201	coro->prio = newprio;
		1202	}
		1203	}
		1204
		1205	SV *
1132	ready(self)	1206	ready (SV *self)
1133	SV * self
1134	PROTOTYPE: $	1207	PROTOTYPE: $
1135	CODE:	1208	CODE:
1136	api_ready (self);	1209	RETVAL = boolSV (api_ready (self));
		1210	OUTPUT:
		1211	RETVAL
1137		1212
1138	#endif	1213	SV *
		1214	is_ready (SV *self)
		1215	PROTOTYPE: $
		1216	CODE:
		1217	RETVAL = boolSV (api_is_ready (self));
		1218	OUTPUT:
		1219	RETVAL
1139		1220
1140	int	1221	int
1141	nready(...)	1222	nready (...)
1142	PROTOTYPE:	1223	PROTOTYPE:
1143	CODE:	1224	CODE:
1144	RETVAL = coro_nready;	1225	RETVAL = coro_nready;
1145	OUTPUT:	1226	OUTPUT:
1146	RETVAL	1227	RETVAL
1147		1228
1148	void	1229	MODULE = Coro::State PACKAGE = Coro::AIO
1149	schedule(...)
1150	PROTOTYPE:
1151	CODE:
1152	api_schedule ();
1153		1230
1154	void
1155	cede(...)
1156	PROTOTYPE:
1157	CODE:
1158	api_cede ();
1159
1160	# and these are hacks
1161	SV *	1231	SV *
1162	_aio_get_state ()	1232	_get_state ()
1163	CODE:	1233	CODE:
1164	{	1234	{
1165	struct {	1235	struct {
1166	int errorno;	1236	int errorno;
1167	int laststype;	1237	int laststype;
…		…
1178	}	1248	}
1179	OUTPUT:	1249	OUTPUT:
1180	RETVAL	1250	RETVAL
1181		1251
1182	void	1252	void
1183	_aio_set_state (char *data_)	1253	_set_state (char *data_)
1184	PROTOTYPE: $	1254	PROTOTYPE: $
1185	CODE:	1255	CODE:
1186	{	1256	{
1187	struct {	1257	struct {
1188	int errorno;	1258	int errorno;

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