[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "patchlevel.h"	7	#include "patchlevel.h"
6		8
7	#if PATCHLEVEL < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	\|\| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
10	# endif	25	# endif
11	# ifndef call_sv	26	# ifndef call_sv
12	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
23	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
25	# endif	40	# endif
26	#endif	41	#endif
27		42
28	#include "libcoro/coro.c"
29
30	#include <signal.h>	43	#include <stdio.h>
		44	#include <errno.h>
		45
		46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		47	# undef STACKGUARD
		48	#endif
		49
		50	#ifndef STACKGUARD
		51	# define STACKGUARD 0
		52	#endif
31		53
32	#ifdef HAVE_MMAP	54	#ifdef HAVE_MMAP
33	# include <unistd.h>	55	# include <unistd.h>
34	# include <sys/mman.h>	56	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	57	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	59	# define MAP_ANONYMOUS MAP_ANON
38	# else	60	# else
39	# undef HAVE_MMAP	61	# undef HAVE_MMAP
40	# endif	62	# endif
41	# endif	63	# endif
		64	# include <limits.h>
		65	# ifndef PAGESIZE
		66	# define PAGESIZE pagesize
		67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		68	static long pagesize;
		69	# else
		70	# define BOOT_PAGESIZE (void)0
42	#endif	71	# endif
43		72	#else
44	#define MAY_FLUSH /* increases codesize and is rarely used */	73	# define PAGESIZE 0
45		74	# define BOOT_PAGESIZE (void)0
46	#define SUB_INIT "Coro::State::initialize"	75	#endif
47	#define UCORO_STATE "_coro_state"
48		76
49	/* The next macro should declare a variable stacklevel that contains and approximation	77	/* 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	78	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
53		82
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		84
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	85	#if __GNUC__ >= 3
		86	# define attribute(x) __attribute__(x)
		87	#else
		88	# define attribute(x)
		89	#endif
		90
		91	#define NOINLINE attribute ((noinline))
57		92
58	#include "CoroAPI.h"	93	#include "CoroAPI.h"
59		94
		95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		96
		97	#ifdef USE_ITHREADS
		98	static perl_mutex coro_mutex;
		99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		101	#else
		102	# define LOCK (void)0
		103	# define UNLOCK (void)0
		104	#endif
		105
		106	struct io_state
		107	{
		108	int errorno;
		109	I32 laststype;
		110	int laststatval;
		111	Stat_t statcache;
		112	};
		113
60	static struct CoroAPI coroapi;	114	static struct CoroAPI coroapi;
		115	static AV main_mainstack; / used to differentiate between $main and others */
		116	static HV coro_state_stash, coro_stash;
		117	static SV coro_mortal; / will be freed after next transfer */
61		118
62	/* this is actually not only the c stack but also c registers etc... */	119	static struct coro_cctx *cctx_first;
		120	static int cctx_count, cctx_idle;
		121
		122	/* this is a structure representing a c-level coroutine */
63	typedef struct {	123	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	124	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		125
68	coro_context cctx;	126	/* the stack */
69
70	void *sptr;	127	void *sptr;
71	long ssize; /* positive == mmap, otherwise malloc */	128	long ssize; /* positive == mmap, otherwise malloc */
72	} coro_stack;
73		129
		130	/* cpu state */
		131	void idle_sp; / sp of top-level transfer/schedule/cede call */
		132	JMPENV *top_env;
		133	coro_context cctx;
		134
		135	int inuse;
		136
		137	#if USE_VALGRIND
		138	int valgrind_id;
		139	#endif
		140	} coro_cctx;
		141
		142	enum {
		143	CF_RUNNING = 0x0001, /* coroutine is running */
		144	CF_READY = 0x0002, /* coroutine is ready */
		145	CF_NEW = 0x0004, /* ahs never been switched to */
		146	};
		147
		148	/* this is a structure representing a perl-level coroutine */
74	struct coro {	149	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	150	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	151	coro_cctx *cctx;
77		152
78	/* the optional C context */	153	/* data associated with this coroutine (initial args) */
79	coro_stack *stack;	154	AV *args;
80	void *cursp;
81	int gencnt;	155	int refcnt;
		156	int flags;
82		157
83	/* optionally saved, might be zero */	158	/* optionally saved, might be zero */
84	AV *defav;	159	AV *defav;
85	SV *defsv;	160	SV *defsv;
86	SV *errsv;	161	SV *errsv;
87		162
88	/* saved global state not related to stacks */	163	#define VAR(name,type) type name;
89	U8 dowarn;	164	# include "state.h"
90	I32 in_eval;	165	#undef VAR
91		166
92	/* the stacks and related info (callchain etc..) */	167	/* coro process data */
93	PERL_SI *curstackinfo;	168	int prio;
94	AV *curstack;
95	AV *mainstack;
96	SV **stack_sp;
97	OP *op;
98	SV **curpad;
99	AV *comppad;
100	SV **stack_base;
101	SV **stack_max;
102	SV **tmps_stack;
103	I32 tmps_floor;
104	I32 tmps_ix;
105	I32 tmps_max;
106	I32 *markstack;
107	I32 *markstack_ptr;
108	I32 *markstack_max;
109	I32 *scopestack;
110	I32 scopestack_ix;
111	I32 scopestack_max;
112	ANY *savestack;
113	I32 savestack_ix;
114	I32 savestack_max;
115	OP **retstack;
116	I32 retstack_ix;
117	I32 retstack_max;
118	COP *curcop;
119	JMPENV *top_env;
120
121	/* data associated with this coroutine (initial args) */
122	AV *args;
123	};	169	};
124		170
125	typedef struct coro *Coro__State;	171	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	172	typedef struct coro *Coro__State_or_hashref;
127		173
128	static AV main_mainstack; / used to differentiate between $main and others */	174	static AV *
129	static HV *coro_state_stash;	175	coro_clone_padlist (CV *cv)
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV coro_mortal; / will be freed after next transfer */
134
135	/* mostly copied from op.c:cv_clone2 */
136	STATIC AV *
137	clone_padlist (AV *protopadlist)
138	{	176	{
139	AV *av;	177	AV *padlist = CvPADLIST (cv);
140	I32 ix;
141	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
142	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV newpadlist, newpad_name, *newpad;	178	AV newpadlist, newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157		179
158	newpadlist = newAV ();	180	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	181	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	182	#if PERL_VERSION_ATLEAST (5,9,0)
		183	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		184	#else
		185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		186	#endif
		187	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		188	--AvFILLp (padlist);
		189
		190	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	191	av_store (newpadlist, 1, (SV *)newpad);
162		192
163	av = newAV (); /* will be @_ */	193	return newpadlist;
164	av_extend (av, 0);	194	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		195
168	for (ix = fpad; ix > 0; ix--)	196	static void
		197	free_padlist (AV *padlist)
		198	{
		199	/* may be during global destruction */
		200	if (SvREFCNT (padlist))
169	{	201	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	202	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	203	while (i >= 0)
172	{	204	{
173	char name = SvPVX (namesv); / XXX */	205	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	206	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	207	{
178	else
179	{ /* our own lexical */
180	SV *sv;	208	SV *sv;
181	if (*name == '&')	209	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	210	SvREFCNT_dec (sv);
183	else if (*name == '@')	211
184	sv = (SV *) newAV ();	212	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	if (!SvPADBUSY (sv))
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}	213	}
193	}	214	}
194	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	215
195	{	216	SvREFCNT_dec ((SV*)padlist);
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}	217	}
		218	}
205		219
206	#if 0 /* return -ENOTUNDERSTOOD */	220	static int
207	/* Now that vars are all in place, clone nested closures. */	221	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		222	{
		223	AV *padlist;
		224	AV av = (AV )mg->mg_obj;
208		225
209	for (ix = fpad; ix > 0; ix--) {	226	/* casting is fun. */
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	227	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
211	if (namesv	228	free_padlist (padlist);
212	&& namesv != &PL_sv_undef	229
213	&& !(SvFLAGS(namesv) & SVf_FAKE)	230	SvREFCNT_dec (av);
214	&& *SvPVX(namesv) == '&'	231
215	&& CvCLONE(ppad[ix]))	232	return 0;
216	{	233	}
217	CV kid = cv_clone((CV)ppad[ix]);	234
218	SvREFCNT_dec(ppad[ix]);	235	#define PERL_MAGIC_coro PERL_MAGIC_ext
219	CvCLONE_on(kid);	236
220	SvPADMY_on(kid);	237	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221	npad[ix] = (SV*)kid;	238
222	}	239	#define CORO_MAGIC(cv) \
		240	SvMAGIC (cv) \
		241	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		242	? SvMAGIC (cv) \
		243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		244	: 0
		245
		246	/* the next two functions merely cache the padlists */
		247	static void
		248	get_padlist (CV *cv)
		249	{
		250	MAGIC *mg = CORO_MAGIC (cv);
		251	AV *av;
		252
		253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		255	else
		256	{
		257	#if 0
		258	/* this is probably cleaner, but also slower? */
		259	CV *cp = Perl_cv_clone (cv);
		260	CvPADLIST (cv) = CvPADLIST (cp);
		261	CvPADLIST (cp) = 0;
		262	SvREFCNT_dec (cp);
		263	#else
		264	CvPADLIST (cv) = coro_clone_padlist (cv);
		265	#endif
		266	}
		267	}
		268
		269	static void
		270	put_padlist (CV *cv)
		271	{
		272	MAGIC *mg = CORO_MAGIC (cv);
		273	AV *av;
		274
		275	if (!mg)
		276	{
		277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		279	mg->mg_virtual = &vtbl_coro;
		280	mg->mg_obj = (SV *)newAV ();
223	}	281	}
224	#endif
225		282
226	return newpadlist;	283	av = (AV *)mg->mg_obj;
227	}
228		284
229	#ifdef MAY_FLUSH	285	if (AvFILLp (av) >= AvMAX (av))
230	STATIC void	286	av_extend (av, AvMAX (av) + 1);
231	free_padlist (AV *padlist)
232	{
233	/* may be during global destruction */
234	if (SvREFCNT(padlist))
235	{
236	I32 i = AvFILLp(padlist);
237	while (i >= 0)
238	{
239	SV **svp = av_fetch(padlist, i--, FALSE);
240	SV sv = svp ? svp : Nullsv;
241	if (sv)
242	SvREFCNT_dec(sv);
243	}
244		287
245	SvREFCNT_dec((SV*)padlist);	288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
246	}
247	}	289	}
248	#endif
249
250	/* the next two functions merely cache the padlists */
251	STATIC void
252	get_padlist (CV *cv)
253	{
254	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
255
256	if (he && AvFILLp ((AV )he) >= 0)
257	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
258	else
259	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
260	}
261
262	STATIC void
263	put_padlist (CV *cv)
264	{
265	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
266
267	if (SvTYPE (*he) != SVt_PVAV)
268	{
269	SvREFCNT_dec (*he);
270	he = (SV )newAV ();
271	}
272
273	av_push ((AV )he, (SV *)CvPADLIST (cv));
274	}
275
276	#ifdef MAY_FLUSH
277	STATIC void
278	flush_padlist_cache ()
279	{
280	HV *hv = padlist_cache;
281	padlist_cache = newHV ();
282
283	if (hv_iterinit (hv))
284	{
285	HE *he;
286	AV *padlist;
287
288	while (!!(he = hv_iternext (hv)))
289	{
290	AV av = (AV )HeVAL(he);
291
292	/* casting is fun. */
293	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
294	free_padlist (padlist);
295	}
296	}
297
298	SvREFCNT_dec (hv);
299	}
300	#endif
301		290
302	#define SB do {	291	#define SB do {
303	#define SE } while (0)	292	#define SE } while (0)
304		293
305	#define LOAD(state) load_state(aTHX_ (state));	294	#define LOAD(state) load_state ((state))
306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	295	#define SAVE(state,flags) save_state ((state),(flags))
307		296
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	297	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
309		298
310	static void	299	static void
311	load_state(pTHX_ Coro__State c)	300	load_state (Coro__State c)
312	{	301	{
313	PL_dowarn = c->dowarn;	302	#define VAR(name,type) PL_ ## name = c->name;
314	PL_in_eval = c->in_eval;	303	# include "state.h"
315		304	#undef VAR
316	PL_curstackinfo = c->curstackinfo;
317	PL_curstack = c->curstack;
318	PL_mainstack = c->mainstack;
319	PL_stack_sp = c->stack_sp;
320	PL_op = c->op;
321	PL_curpad = c->curpad;
322	PL_comppad = c->comppad;
323	PL_stack_base = c->stack_base;
324	PL_stack_max = c->stack_max;
325	PL_tmps_stack = c->tmps_stack;
326	PL_tmps_floor = c->tmps_floor;
327	PL_tmps_ix = c->tmps_ix;
328	PL_tmps_max = c->tmps_max;
329	PL_markstack = c->markstack;
330	PL_markstack_ptr = c->markstack_ptr;
331	PL_markstack_max = c->markstack_max;
332	PL_scopestack = c->scopestack;
333	PL_scopestack_ix = c->scopestack_ix;
334	PL_scopestack_max = c->scopestack_max;
335	PL_savestack = c->savestack;
336	PL_savestack_ix = c->savestack_ix;
337	PL_savestack_max = c->savestack_max;
338	PL_retstack = c->retstack;
339	PL_retstack_ix = c->retstack_ix;
340	PL_retstack_max = c->retstack_max;
341	PL_curcop = c->curcop;
342	PL_top_env = c->top_env;
343		305
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347		309
…		…
350	CV *cv;	312	CV *cv;
351		313
352	/* now do the ugly restore mess */	314	/* now do the ugly restore mess */
353	while ((cv = (CV *)POPs))	315	while ((cv = (CV *)POPs))
354	{	316	{
355	AV padlist = (AV )POPs;
356
357	if (padlist)
358	{
359	put_padlist (cv); /* mark this padlist as available */	317	put_padlist (cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;	318	CvDEPTH (cv) = PTR2IV (POPs);
361	#ifdef USE_THREADS	319	CvPADLIST (cv) = (AV *)POPs;
362	/CvOWNER(cv) = (struct perl_thread )POPs;*/
363	#endif
364	}
365
366	++CvDEPTH(cv);
367	}	320	}
368		321
369	PUTBACK;	322	PUTBACK;
370	}	323	}
371	}	324	}
372		325
373	static void	326	static void
374	save_state(pTHX_ Coro__State c, int flags)	327	save_state (Coro__State c, int flags)
375	{	328	{
376	{	329	{
377	dSP;	330	dSP;
378	I32 cxix = cxstack_ix;	331	I32 cxix = cxstack_ix;
379	PERL_CONTEXT *ccstk = cxstack;	332	PERL_CONTEXT *ccstk = cxstack;
…		…
390	{	343	{
391	while (cxix >= 0)	344	while (cxix >= 0)
392	{	345	{
393	PERL_CONTEXT *cx = &ccstk[cxix--];	346	PERL_CONTEXT *cx = &ccstk[cxix--];
394		347
395	if (CxTYPE(cx) == CXt_SUB)	348	if (CxTYPE (cx) == CXt_SUB)
396	{	349	{
397	CV *cv = cx->blk_sub.cv;	350	CV *cv = cx->blk_sub.cv;
		351
398	if (CvDEPTH(cv))	352	if (CvDEPTH (cv))
399	{	353	{
400	#ifdef USE_THREADS
401	/XPUSHs ((SV )CvOWNER(cv));*/
402	/CvOWNER(cv) = 0;/
403	/error must unlock this cv etc.. etc.../
404	#endif
405	EXTEND (SP, CvDEPTH(cv)*2);	354	EXTEND (SP, 3);
406		355
407	while (--CvDEPTH(cv))
408	{
409	/* this tells the restore code to increment CvDEPTH */
410	PUSHs (Nullsv);
411	PUSHs ((SV *)cv);
412	}
413
414	PUSHs ((SV *)CvPADLIST(cv));	356	PUSHs ((SV *)CvPADLIST (cv));
		357	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
415	PUSHs ((SV *)cv);	358	PUSHs ((SV *)cv);
416		359
		360	CvDEPTH (cv) = 0;
417	get_padlist (cv); /* this is a monster */	361	get_padlist (cv);
418	}	362	}
419	}	363	}
420	#ifdef CXt_FORMAT	364	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)	365	else if (CxTYPE (cx) == CXt_FORMAT)
422	{	366	{
423	/* I never used formats, so how should I know how these are implemented? */	367	/* I never used formats, so how should I know how these are implemented? */
424	/* my bold guess is as a simple, plain sub... */	368	/* my bold guess is as a simple, plain sub... */
425	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	369	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
426	}	370	}
…		…
440		384
441	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	385	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	386	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	387	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
444		388
445	c->dowarn = PL_dowarn;	389	#define VAR(name,type)c->name = PL_ ## name;
446	c->in_eval = PL_in_eval;	390	# include "state.h"
447		391	#undef VAR
448	c->curstackinfo = PL_curstackinfo;
449	c->curstack = PL_curstack;
450	c->mainstack = PL_mainstack;
451	c->stack_sp = PL_stack_sp;
452	c->op = PL_op;
453	c->curpad = PL_curpad;
454	c->comppad = PL_comppad;
455	c->stack_base = PL_stack_base;
456	c->stack_max = PL_stack_max;
457	c->tmps_stack = PL_tmps_stack;
458	c->tmps_floor = PL_tmps_floor;
459	c->tmps_ix = PL_tmps_ix;
460	c->tmps_max = PL_tmps_max;
461	c->markstack = PL_markstack;
462	c->markstack_ptr = PL_markstack_ptr;
463	c->markstack_max = PL_markstack_max;
464	c->scopestack = PL_scopestack;
465	c->scopestack_ix = PL_scopestack_ix;
466	c->scopestack_max = PL_scopestack_max;
467	c->savestack = PL_savestack;
468	c->savestack_ix = PL_savestack_ix;
469	c->savestack_max = PL_savestack_max;
470	c->retstack = PL_retstack;
471	c->retstack_ix = PL_retstack_ix;
472	c->retstack_max = PL_retstack_max;
473	c->curcop = PL_curcop;
474	c->top_env = PL_top_env;
475	}	392	}
476		393
477	/*	394	/*
478	* allocate various perl stacks. This is an exact copy	395	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory	396	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need	397	* on the (sometimes correct) assumption that coroutines do
481	* a lot of stackspace.	398	* not usually need a lot of stackspace.
482	*/	399	*/
483	STATIC void	400	static void
484	coro_init_stacks (pTHX)	401	coro_init_stacks ()
485	{	402	{
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	403	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
487	PL_curstackinfo->si_type = PERLSI_MAIN;	404	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	405	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	406	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		407
491	PL_stack_base = AvARRAY(PL_curstack);	408	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	409	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	410	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		411
495	New(50,PL_tmps_stack,96,SV*);	412	New(50,PL_tmps_stack,128,SV*);
496	PL_tmps_floor = -1;	413	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	414	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	415	PL_tmps_max = 128;
499		416
500	New(54,PL_markstack,16,I32);	417	New(54,PL_markstack,32,I32);
501	PL_markstack_ptr = PL_markstack;	418	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	419	PL_markstack_max = PL_markstack + 32;
503		420
504	#ifdef SET_MARK_OFFSET	421	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;	422	SET_MARK_OFFSET;
506	#endif	423	#endif
507		424
508	New(54,PL_scopestack,16,I32);	425	New(54,PL_scopestack,32,I32);
509	PL_scopestack_ix = 0;	426	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	427	PL_scopestack_max = 32;
511		428
512	New(54,PL_savestack,96,ANY);	429	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	430	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	431	PL_savestack_max = 64;
515		432
		433	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	434	New(54,PL_retstack,16,OP*);
517	PL_retstack_ix = 0;	435	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	436	PL_retstack_max = 16;
		437	#endif
519	}	438	}
520		439
521	/*	440	/*
522	* destroy the stacks, the callchain etc...	441	* destroy the stacks, the callchain etc...
523	* still there is a memleak of 128 bytes...
524	*/	442	*/
525	STATIC void	443	static void
526	destroy_stacks(pTHX)	444	coro_destroy_stacks ()
527	{	445	{
528	if (!IN_DESTRUCT)	446	if (!IN_DESTRUCT)
529	{	447	{
530	/* is this ugly, I ask? */	448	/* is this ugly, I ask? */
531	while (PL_scopestack_ix)	449	LEAVE_SCOPE (0);
532	LEAVE;
533		450
534	/* sure it is, but more important: is it correct?? :/ */	451	/* sure it is, but more important: is it correct?? :/ */
535	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
536	FREETMPS;	452	FREETMPS;
		453
		454	/POPSTACK_TO (PL_mainstack);//D//use/
537	}	455	}
538		456
539	while (PL_curstackinfo->si_next)	457	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;	458	PL_curstackinfo = PL_curstackinfo->si_next;
541		459
542	while (PL_curstackinfo)	460	while (PL_curstackinfo)
543	{	461	{
544	PERL_SI *p = PL_curstackinfo->si_prev;	462	PERL_SI *p = PL_curstackinfo->si_prev;
545		463
546	{	464	{ /D//remove/
547	dSP;	465	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	466	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */	467	PUTBACK; /* possibly superfluous */
550	}	468	}
551		469
552	if (!IN_DESTRUCT)	470	if (!IN_DESTRUCT)
553	{	471	{
554	dounwind(-1);	472	dounwind (-1);/D//remove/
555	SvREFCNT_dec(PL_curstackinfo->si_stack);	473	SvREFCNT_dec (PL_curstackinfo->si_stack);
556	}	474	}
557		475
558	Safefree(PL_curstackinfo->si_cxstack);	476	Safefree (PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);	477	Safefree (PL_curstackinfo);
560	PL_curstackinfo = p;	478	PL_curstackinfo = p;
561	}	479	}
562		480
563	Safefree(PL_tmps_stack);	481	Safefree (PL_tmps_stack);
564	Safefree(PL_markstack);	482	Safefree (PL_markstack);
565	Safefree(PL_scopestack);	483	Safefree (PL_scopestack);
566	Safefree(PL_savestack);	484	Safefree (PL_savestack);
		485	#if !PERL_VERSION_ATLEAST (5,9,0)
567	Safefree(PL_retstack);	486	Safefree (PL_retstack);
568	}
569
570	static void
571	allocate_stack (Coro__State ctx, int alloc)
572	{
573	coro_stack *stack;
574
575	New (0, stack, 1, coro_stack);
576
577	stack->refcnt = 1;
578	stack->usecnt = 1;
579	stack->gencnt = ctx->gencnt = 0;
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif	487	#endif
587	{
588	/FIXME//D//* reasonable stack size! */
589	stack->ssize = -4096 * sizeof (long);
590	New (0, stack->sptr, 4096, long);
591	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}	488	}
598		489
599	static void	490	static void
600	deallocate_stack (Coro__State ctx)	491	setup_coro (struct coro *coro)
601	{
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#else
615	Safefree (stack->sptr);
616	#endif
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623
624	static void
625	setup_coro (void *arg)
626	{	492	{
627	/*	493	/*
628	* emulate part of the perl startup here.	494	* emulate part of the perl startup here.
629	*/	495	*/
630	dSP;
631	Coro__State ctx = (Coro__State)arg;
632	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
633		496
634	coro_init_stacks (aTHX);	497	coro_init_stacks ();
635	/PL_curcop = 0;/	498
636	/PL_in_eval = PL_in_eval;/ /* inherit */	499	PL_curcop = &PL_compiling;
		500	PL_in_eval = EVAL_NULL;
		501	PL_curpm = 0;
		502	PL_localizing = 0;
		503	PL_dirty = 0;
		504	PL_restartop = 0;
		505
		506	{
		507	dSP;
		508	LOGOP myop;
		509
637	SvREFCNT_dec (GvAV (PL_defgv));	510	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args;	511	GvAV (PL_defgv) = coro->args; coro->args = 0;
639		512
640	SPAGAIN;
641
642	if (ctx->stack)
643	{
644	ctx->cursp = 0;
645
646	PUSHMARK(SP);
647	PUTBACK;
648	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
649
650	if (SvTRUE (ERRSV))
651	croak (NULL);
652	else
653	croak ("FATAL: CCTXT coroutine returned!");
654	}
655	else
656	{
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);	513	Zero (&myop, 1, LOGOP);
662	myop.op_next = Nullop;	514	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;	515	myop.op_flags = OPf_WANT_VOID;
664		516
665	PUSHMARK(SP);	517	PUSHMARK (SP);
666	XPUSHs (sub_init);	518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;	519	PUTBACK;
		520	PL_op = (OP *)&myop;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;	522	SPAGAIN;
		523	}
677		524
678	ENTER; /* necessary e.g. for dounwind */	525	ENTER; /* necessary e.g. for dounwind */
679	}
680	}	526	}
681		527
682	static void	528	static void
683	continue_coro (void *arg)	529	free_coro_mortal ()
684	{	530	{
685	/*
686	* this is a _very_ stripped down perl interpreter ;)
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;
692
693	ctx->cursp = 0;
694	PL_op = PL_op->op_next;
695	CALLRUNOPS(aTHX);
696
697	abort ();
698	}
699
700	STATIC void
701	transfer(pTHX_ struct coro prev, struct coro next, int flags)
702	{
703	dSTACKLEVEL;
704	static struct coro *xnext;
705
706	if (prev != next)
707	{
708	xnext = next;
709
710	if (next->mainstack)
711	{
712	SAVE (prev, flags);
713	LOAD (next);
714
715	/* mark this state as in-use */
716	next->mainstack = 0;
717	next->tmps_ix = -2;
718
719	/* stacklevel changed? if yes, grab the stack for us! */
720	if (flags & TRANSFER_SAVE_CCTXT)
721	{
722	if (!prev->stack)
723	allocate_stack (prev, 0);
724	else if (prev->cursp != stacklevel
725	&& prev->stack->usecnt > 1)
726	{
727	prev->gencnt = ++prev->stack->gencnt;
728	prev->stack->usecnt = 1;
729	}
730
731	/* has our stack been invalidated? */
732	if (next->stack && next->stack->gencnt != next->gencnt)
733	{
734	deallocate_stack (next);
735	allocate_stack (next, 1);
736	coro_create (&(next->stack->cctx),
737	continue_coro, (void *)next,
738	next->stack->sptr, labs (next->stack->ssize));
739	}
740
741	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
742	/* don't add any code here */
743	}
744
745	}
746	else if (next->tmps_ix == -2)
747	croak ("tried to transfer to running coroutine");
748	else
749	{
750	SAVE (prev, -1); /* first get rid of the old state */
751
752	if (flags & TRANSFER_SAVE_CCTXT)
753	{
754	if (!prev->stack)
755	allocate_stack (prev, 0);
756
757	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
758	{
759	PL_top_env = &next->start_env;
760
761	setup_coro (next);
762
763	prev->stack->refcnt++;
764	prev->stack->usecnt++;
765	next->stack = prev->stack;
766	next->gencnt = prev->gencnt;
767	}
768	else
769	{
770	allocate_stack (next, 1);
771	coro_create (&(next->stack->cctx),
772	setup_coro, (void *)next,
773	next->stack->sptr, labs (next->stack->ssize));
774	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
775	/* don't add any code here */
776	}
777	}
778	else
779	setup_coro (next);
780	}
781
782	/*
783	* xnext is now either prev or next, depending on wether
784	* we switched the c stack or not. that's why I use a global
785	* variable, that should become thread-specific at one point.
786	*/
787	xnext->cursp = stacklevel;
788	}
789
790	if (coro_mortal)	531	if (coro_mortal)
791	{	532	{
792	SvREFCNT_dec (coro_mortal);	533	SvREFCNT_dec (coro_mortal);
793	coro_mortal = 0;	534	coro_mortal = 0;
794	}	535	}
795	}	536	}
796		537
797	#define SV_CORO(sv,func) \	538	/* inject a fake call to Coro::State::_cctx_init into the execution */
798	do { \	539	static void NOINLINE
799	if (SvROK (sv)) \	540	prepare_cctx (coro_cctx *cctx)
800	sv = SvRV (sv); \	541	{
801	\	542	dSP;
802	if (SvTYPE(sv) == SVt_PVHV) \	543	LOGOP myop;
803	{ \
804	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
805	\
806	if (!he) \
807	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808	\
809	(sv) = SvRV (HeVAL(he)); \
810	} \
811	\
812	/* must also be changed inside Coro::Cont::yield */ \
813	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
814	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
815	\
816	} while(0)
817		544
818	#define SvSTATE(sv) (struct coro *)SvIV (sv)	545	Zero (&myop, 1, LOGOP);
		546	myop.op_next = PL_op;
		547	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
819		548
		549	PUSHMARK (SP);
		550	EXTEND (SP, 2);
		551	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		552	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		553	PUTBACK;
		554	PL_op = (OP *)&myop;
		555	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		556	SPAGAIN;
		557	}
		558
		559	static void
		560	coro_run (void *arg)
		561	{
		562	/* coro_run is the alternative tail of transfer(), so unlock here. */
		563	UNLOCK;
		564
		565	/*
		566	* this is a _very_ stripped down perl interpreter ;)
		567	*/
		568	PL_top_env = &PL_start_env;
		569
		570	/* inject call to cctx_init */
		571	prepare_cctx ((coro_cctx *)arg);
		572
		573	/* somebody will hit me for both perl_run and PL_restartop */
		574	PL_restartop = PL_op;
		575	perl_run (PL_curinterp);
		576
		577	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		578	abort ();
		579	}
		580
		581	static coro_cctx *
		582	cctx_new ()
		583	{
		584	coro_cctx *cctx;
		585
		586	++cctx_count;
		587
		588	New (0, cctx, 1, coro_cctx);
		589
		590	#if HAVE_MMAP
		591
		592	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		593	/* mmap supposedly does allocate-on-write for us */
		594	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		595
		596	if (cctx->sptr == (void *)-1)
		597	{
		598	perror ("FATAL: unable to mmap stack for coroutine");
		599	_exit (EXIT_FAILURE);
		600	}
		601
		602	# if STACKGUARD
		603	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		604	# endif
		605
		606	#else
		607
		608	cctx->ssize = STACKSIZE * (long)sizeof (long);
		609	New (0, cctx->sptr, STACKSIZE, long);
		610
		611	if (!cctx->sptr)
		612	{
		613	perror ("FATAL: unable to malloc stack for coroutine");
		614	_exit (EXIT_FAILURE);
		615	}
		616
		617	#endif
		618
		619	#if USE_VALGRIND
		620	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		621	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		622	cctx->ssize + (char *)cctx->sptr
		623	);
		624	#endif
		625
		626	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		627
		628	return cctx;
		629	}
		630
		631	static void
		632	cctx_destroy (coro_cctx *cctx)
		633	{
		634	if (!cctx)
		635	return;
		636
		637	--cctx_count;
		638
		639	#if USE_VALGRIND
		640	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		641	#endif
		642
		643	#if HAVE_MMAP
		644	munmap (cctx->sptr, cctx->ssize);
		645	#else
		646	Safefree (cctx->sptr);
		647	#endif
		648
		649	Safefree (cctx);
		650	}
		651
		652	static coro_cctx *
		653	cctx_get ()
		654	{
		655	coro_cctx *cctx;
		656
		657	if (cctx_first)
		658	{
		659	cctx = cctx_first;
		660	cctx_first = cctx->next;
		661	--cctx_idle;
		662	}
		663	else
		664	{
		665	cctx = cctx_new ();
		666	PL_op = PL_op->op_next;
		667	}
		668
		669	return cctx;
		670	}
		671
		672	static void
		673	cctx_put (coro_cctx *cctx)
		674	{
		675	/* free another cctx if overlimit */
		676	if (cctx_idle >= MAX_IDLE_CCTX)
		677	{
		678	coro_cctx *first = cctx_first;
		679	cctx_first = first->next;
		680	--cctx_idle;
		681
		682	assert (!first->inuse);
		683	cctx_destroy (first);
		684	}
		685
		686	++cctx_idle;
		687	cctx->next = cctx_first;
		688	cctx_first = cctx;
		689	}
		690
		691	/* never call directly, always through the coro_state_transfer global variable */
		692	static void NOINLINE
		693	transfer (struct coro prev, struct coro next, int flags)
		694	{
		695	dSTACKLEVEL;
		696
		697	/* sometimes transfer is only called to set idle_sp */
		698	if (flags == TRANSFER_SET_STACKLEVEL)
		699	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		700	else if (prev != next)
		701	{
		702	coro_cctx *prev__cctx;
		703
		704	if (prev->flags & CF_NEW)
		705	{
		706	/* create a new empty context */
		707	Newz (0, prev->cctx, 1, coro_cctx);
		708	prev->cctx->inuse = 1;
		709	prev->flags &= ~CF_NEW;
		710	prev->flags \|= CF_RUNNING;
		711	}
		712
		713	/TODO: must not croak here /
		714	if (!prev->flags & CF_RUNNING)
		715	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		716
		717	if (next->flags & CF_RUNNING)
		718	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		719
		720	prev->flags &= ~CF_RUNNING;
		721	next->flags \|= CF_RUNNING;
		722
		723	LOCK;
		724
		725	if (next->flags & CF_NEW)
		726	{
		727	/* need to start coroutine */
		728	next->flags &= ~CF_NEW;
		729	/* first get rid of the old state */
		730	SAVE (prev, -1);
		731	/* setup coroutine call */
		732	setup_coro (next);
		733	/* need a new stack */
		734	assert (!next->stack);
		735	}
		736	else
		737	{
		738	/* coroutine already started */
		739	SAVE (prev, flags);
		740	LOAD (next);
		741	}
		742
		743	prev__cctx = prev->cctx;
		744
		745	/* possibly "free" the cctx */
		746	if (prev__cctx->idle_sp == STACKLEVEL)
		747	{
		748	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		749	assert (PL_top_env == prev__cctx->top_env);
		750
		751	prev->cctx = 0;
		752
		753	cctx_put (prev__cctx);
		754	prev__cctx->inuse = 0;
		755	}
		756
		757	if (!next->cctx)
		758	{
		759	next->cctx = cctx_get ();
		760	assert (!next->cctx->inuse);
		761	next->cctx->inuse = 1;
		762	}
		763
		764	if (prev__cctx != next->cctx)
		765	{
		766	prev__cctx->top_env = PL_top_env;
		767	PL_top_env = next->cctx->top_env;
		768	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		769	}
		770
		771	free_coro_mortal ();
		772
		773	UNLOCK;
		774	}
		775	}
		776
		777	struct transfer_args
		778	{
		779	struct coro prev, next;
		780	int flags;
		781	};
		782
		783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		784
		785	static void
		786	coro_state_destroy (struct coro *coro)
		787	{
		788	if (coro->refcnt--)
		789	return;
		790
		791	if (coro->mainstack && coro->mainstack != main_mainstack)
		792	{
		793	struct coro temp;
		794
		795	if (coro->flags & CF_RUNNING)
		796	croak ("FATAL: tried to destroy currently running coroutine");
		797
		798	SAVE ((&temp), TRANSFER_SAVE_ALL);
		799	LOAD (coro);
		800
		801	coro_destroy_stacks ();
		802
		803	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		804
		805	coro->mainstack = 0;
		806	}
		807
		808	cctx_destroy (coro->cctx);
		809	SvREFCNT_dec (coro->args);
		810	Safefree (coro);
		811	}
		812
820	static void	813	static int
		814	coro_state_clear (pTHX_ SV sv, MAGIC mg)
		815	{
		816	struct coro coro = (struct coro )mg->mg_ptr;
		817	mg->mg_ptr = 0;
		818
		819	coro_state_destroy (coro);
		820
		821	return 0;
		822	}
		823
		824	static int
		825	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		826	{
		827	struct coro coro = (struct coro )mg->mg_ptr;
		828
		829	++coro->refcnt;
		830
		831	return 0;
		832	}
		833
		834	static MGVTBL coro_state_vtbl = {
		835	0, 0, 0, 0,
		836	coro_state_clear,
		837	0,
		838	#ifdef MGf_DUP
		839	coro_state_dup,
		840	#else
		841	# define MGf_DUP 0
		842	#endif
		843	};
		844
		845	static struct coro *
		846	SvSTATE (SV *coro)
		847	{
		848	HV *stash;
		849	MAGIC *mg;
		850
		851	if (SvROK (coro))
		852	coro = SvRV (coro);
		853
		854	stash = SvSTASH (coro);
		855	if (stash != coro_stash && stash != coro_state_stash)
		856	{
		857	/* very slow, but rare, check */
		858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		859	croak ("Coro::State object required");
		860	}
		861
		862	mg = SvMAGIC (coro);
		863	assert (mg->mg_type == PERL_MAGIC_ext);
		864	return (struct coro *)mg->mg_ptr;
		865	}
		866
		867	static void
		868	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)
		869	{
		870	ta->prev = SvSTATE (prev);
		871	ta->next = SvSTATE (next);
		872	ta->flags = flags;
		873	}
		874
		875	static void
821	api_transfer(pTHX_ SV prev, SV next, int flags)	876	api_transfer (SV prev, SV next, int flags)
822	{	877	{
823	SV_CORO (prev, "Coro::transfer");	878	struct transfer_args ta;
824	SV_CORO (next, "Coro::transfer");
825		879
826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	880	prepare_transfer (&ta, prev, next, flags);
		881	TRANSFER (ta);
827	}	882	}
828		883
829	/ Coro ******************************************************************/	884	/ Coro ******************************************************************/
830		885
831	#define PRIO_MAX 3	886	#define PRIO_MAX 3
…		…
834	#define PRIO_LOW -1	889	#define PRIO_LOW -1
835	#define PRIO_IDLE -3	890	#define PRIO_IDLE -3
836	#define PRIO_MIN -4	891	#define PRIO_MIN -4
837		892
838	/* for Coro.pm */	893	/* for Coro.pm */
839	static GV coro_current, coro_idle;	894	static SV *coro_current;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;	896	static int coro_nready;
842		897
843	static void	898	static void
844	coro_enq (SV *sv)	899	coro_enq (SV *coro_sv)
845	{	900	{
846	if (SvTYPE (sv) == SVt_PVHV)
847	{
848	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
849	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
850
851	prio = prio > PRIO_MAX ? PRIO_MAX
852	: prio < PRIO_MIN ? PRIO_MIN
853	: prio;
854
855	av_push (coro_ready [prio - PRIO_MIN], sv);	901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
856	coro_nready++;	902	coro_nready++;
857
858	return;
859	}
860
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");
862	}	903	}
863		904
864	static SV *	905	static SV *
865	coro_deq (int min_prio)	906	coro_deq (int min_prio)
866	{	907	{
…		…
869	min_prio -= PRIO_MIN;	910	min_prio -= PRIO_MIN;
870	if (min_prio < 0)	911	if (min_prio < 0)
871	min_prio = 0;	912	min_prio = 0;
872		913
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)	915	if (AvFILLp (coro_ready [prio]) >= 0)
875	{	916	{
876	coro_nready--;	917	coro_nready--;
877	return av_shift (coro_ready[prio]);	918	return av_shift (coro_ready [prio]);
878	}	919	}
879		920
880	return 0;	921	return 0;
881	}	922	}
882		923
883	static void	924	static int
884	api_ready (SV *coro)	925	api_ready (SV *coro_sv)
885	{	926	{
		927	struct coro *coro;
		928
886	if (SvROK (coro))	929	if (SvROK (coro_sv))
887	coro = SvRV (coro);	930	coro_sv = SvRV (coro_sv);
888		931
		932	coro = SvSTATE (coro_sv);
		933
		934	if (coro->flags & CF_READY)
		935	return 0;
		936
		937	#if 0 /* this is actually harmless */
		938	if (coro->flags & CF_RUNNING)
		939	croak ("Coro::ready called on currently running coroutine");
		940	#endif
		941
		942	coro->flags \|= CF_READY;
		943
		944	LOCK;
889	coro_enq (SvREFCNT_inc (coro));	945	coro_enq (SvREFCNT_inc (coro_sv));
		946	UNLOCK;
		947
		948	return 1;
		949	}
		950
		951	static int
		952	api_is_ready (SV *coro_sv)
		953	{
		954	return !!SvSTATE (coro_sv)->flags & CF_READY;
		955	}
		956
		957	static void
		958	prepare_schedule (struct transfer_args *ta)
		959	{
		960	SV prev, next;
		961
		962	for (;;)
		963	{
		964	LOCK;
		965	next = coro_deq (PRIO_MIN);
		966	UNLOCK;
		967
		968	if (next)
		969	break;
		970
		971	{
		972	dSP;
		973
		974	ENTER;
		975	SAVETMPS;
		976
		977	PUSHMARK (SP);
		978	PUTBACK;
		979	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		980
		981	FREETMPS;
		982	LEAVE;
		983	}
		984	}
		985
		986	prev = SvRV (coro_current);
		987	SvRV_set (coro_current, next);
		988
		989	/* free this only after the transfer */
		990	LOCK;
		991	free_coro_mortal ();
		992	UNLOCK;
		993	coro_mortal = prev;
		994
		995	assert (!SvROK(prev));//D
		996	assert (!SvROK(next));//D
		997
		998	ta->prev = SvSTATE (prev);
		999	ta->next = SvSTATE (next);
		1000	ta->flags = TRANSFER_SAVE_ALL;
		1001
		1002	assert (ta->flags & CF_READY);
		1003	ta->next->flags &= ~CF_READY;
		1004	}
		1005
		1006	static void
		1007	prepare_cede (struct transfer_args *ta)
		1008	{
		1009	api_ready (coro_current);
		1010
		1011	prepare_schedule (ta);
890	}	1012	}
891		1013
892	static void	1014	static void
893	api_schedule (void)	1015	api_schedule (void)
894	{	1016	{
895	SV prev, next;	1017	struct transfer_args ta;
896		1018
897	prev = SvRV (GvSV (coro_current));	1019	prepare_schedule (&ta);
898	next = coro_deq (PRIO_MIN);	1020	TRANSFER (ta);
899
900	if (!next)
901	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
902
903	/* free this only after the transfer */
904	coro_mortal = prev;
905	SV_CORO (prev, "Coro::schedule");
906
907	SvRV (GvSV (coro_current)) = next;
908
909	SV_CORO (next, "Coro::schedule");
910
911	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
912	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
913	}	1021	}
914		1022
915	static void	1023	static void
916	api_cede (void)	1024	api_cede (void)
917	{	1025	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1026	struct transfer_args ta;
919		1027
920	api_schedule ();	1028	prepare_cede (&ta);
		1029	TRANSFER (ta);
921	}	1030	}
922		1031
923	MODULE = Coro::State PACKAGE = Coro::State	1032	MODULE = Coro::State PACKAGE = Coro::State
924		1033
925	PROTOTYPES: ENABLE	1034	PROTOTYPES: DISABLE
926		1035
927	BOOT:	1036	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	1037	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1038	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1039	MUTEX_INIT (&coro_mutex);
		1040	#endif
		1041	BOOT_PAGESIZE;
		1042
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1044
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
937
938	if (!padlist_cache)
939	padlist_cache = newHV ();
940		1048
941	main_mainstack = PL_mainstack;	1049	main_mainstack = PL_mainstack;
942		1050
943	coroapi.ver = CORO_API_VERSION;	1051	coroapi.ver = CORO_API_VERSION;
944	coroapi.transfer = api_transfer;	1052	coroapi.transfer = api_transfer;
945	}
946		1053
947	Coro::State	1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
948	_newprocess(args)	1055	}
949	SV * args	1056
950	PROTOTYPE: $	1057	SV *
		1058	new (char *klass, ...)
951	CODE:	1059	CODE:
952	Coro__State coro;	1060	{
		1061	struct coro *coro;
		1062	HV *hv;
		1063	int i;
953		1064
954	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
955	croak ("Coro::State::_newprocess expects an arrayref");
956
957	New (0, coro, 1, struct coro);	1065	Newz (0, coro, 1, struct coro);
		1066	coro->args = newAV ();
		1067	coro->flags = CF_NEW;
958		1068
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1069	hv = newHV ();
960	coro->mainstack = 0; /* actual work is done inside transfer */	1070	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
961	coro->stack = 0;	1071	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
962		1072
963	/* same as JMPENV_BOOTSTRAP */	1073	for (i = 1; i < items; i++)
964	/* we might be able to recycle start_env, but safe is safe */	1074	av_push (coro->args, newSVsv (ST (i)));
965	Zero(&coro->start_env, 1, JMPENV);	1075	}
966	coro->start_env.je_ret = -1;
967	coro->start_env.je_mustcatch = TRUE;
968
969	RETVAL = coro;
970	OUTPUT:	1076	OUTPUT:
971	RETVAL	1077	RETVAL
972		1078
973	void	1079	void
974	transfer(prev, next, flags)	1080	_set_stacklevel (...)
975	SV *prev	1081	ALIAS:
976	SV *next	1082	Coro::State::transfer = 1
977	int flags	1083	Coro::schedule = 2
978	PROTOTYPE: @	1084	Coro::cede = 3
979	CODE:	1085	CODE:
980	PUTBACK;	1086	{
981	SV_CORO (next, "Coro::transfer");	1087	struct transfer_args ta;
982	SV_CORO (prev, "Coro::transfer");	1088
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1089	switch (ix)
984	SPAGAIN;	1090	{
		1091	case 0:
		1092	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1093	ta.next = 0;
		1094	ta.flags = TRANSFER_SET_STACKLEVEL;
		1095	break;
		1096
		1097	case 1:
		1098	if (items != 3)
		1099	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
		1100
		1101	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1102	break;
		1103
		1104	case 2:
		1105	prepare_schedule (&ta);
		1106	break;
		1107
		1108	case 3:
		1109	prepare_cede (&ta);
		1110	break;
		1111	}
		1112
		1113	TRANSFER (ta);
		1114	}
985		1115
986	void	1116	void
987	DESTROY(coro)	1117	_clone_state_from (SV dst, SV src)
988	Coro::State coro	1118	CODE:
989	CODE:	1119	{
		1120	struct coro *coro_src = SvSTATE (src);
990		1121
991	if (coro->mainstack && coro->mainstack != main_mainstack)	1122	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
992	{
993	struct coro temp;
994		1123
995	PUTBACK;	1124	++coro_src->refcnt;
996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1125	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
997	LOAD(aTHX_ coro);	1126	}
998	SPAGAIN;
999
1000	destroy_stacks (aTHX);
1001
1002	LOAD((&temp)); /* this will get rid of defsv etc.. */
1003	SPAGAIN;
1004
1005	coro->mainstack = 0;
1006	}
1007
1008	deallocate_stack (coro);
1009
1010	Safefree (coro);
1011		1127
1012	void	1128	void
1013	flush()
1014	CODE:
1015	#ifdef MAY_FLUSH
1016	flush_padlist_cache ();
1017	#endif
1018
1019	void
1020	_exit(code)	1129	_exit (code)
1021	int code	1130	int code
1022	PROTOTYPE: $	1131	PROTOTYPE: $
1023	CODE:	1132	CODE:
1024	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
1025	_exit (code);	1133	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1134
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1135	int
		1136	cctx_count ()
		1137	CODE:
		1138	RETVAL = cctx_count;
		1139	OUTPUT:
		1140	RETVAL
1033		1141
1034	# this is slightly dirty (should expose a c-level api)	1142	int
1035		1143	cctx_idle ()
1036	void	1144	CODE:
1037	yield(...)	1145	RETVAL = cctx_idle;
1038	PROTOTYPE: @	1146	OUTPUT:
1039	CODE:	1147	RETVAL
1040	static SV *returnstk;
1041	SV *sv;
1042	AV *defav = GvAV (PL_defgv);
1043	struct coro prev, next;
1044
1045	if (!returnstk)
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048	/* set up @_ -- ugly */
1049	av_clear (defav);
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1057	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1148
1062	MODULE = Coro::State PACKAGE = Coro	1149	MODULE = Coro::State PACKAGE = Coro
1063		1150
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1151	BOOT:
1067	{	1152	{
1068	int i;	1153	int i;
		1154
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1155	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1156
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1157	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1158	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1159	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1160	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1161	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1162	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1163
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1164	coro_current = get_sv ("Coro::current", FALSE);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1165	SvREADONLY_on (coro_current);
1080		1166
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1167	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1168	coro_ready[i] = newAV ();
1083		1169
1084	{	1170	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1171	SV *sv = perl_get_sv("Coro::API", 1);
1086		1172
1087	coroapi.schedule = api_schedule;	1173	coroapi.schedule = api_schedule;
1088	coroapi.cede = api_cede;	1174	coroapi.cede = api_cede;
1089	coroapi.ready = api_ready;	1175	coroapi.ready = api_ready;
		1176	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1177	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1178	coroapi.current = coro_current;
1092		1179
1093	GCoroAPI = &coroapi;	1180	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1181	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1182	SvREADONLY_on (sv);
1096	}	1183	}
1097	}	1184	}
1098		1185
1099	void	1186	int
		1187	prio (Coro::State coro, int newprio = 0)
		1188	ALIAS:
		1189	nice = 1
		1190	CODE:
		1191	{
		1192	RETVAL = coro->prio;
		1193
		1194	if (items > 1)
		1195	{
		1196	if (ix)
		1197	newprio += coro->prio;
		1198
		1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1201
		1202	coro->prio = newprio;
		1203	}
		1204	}
		1205
		1206	SV *
1100	ready(self)	1207	ready (SV *self)
1101	SV * self
1102	PROTOTYPE: $	1208	PROTOTYPE: $
1103	CODE:	1209	CODE:
1104	api_ready (self);	1210	RETVAL = boolSV (api_ready (self));
		1211	OUTPUT:
		1212	RETVAL
		1213
		1214	SV *
		1215	is_ready (SV *self)
		1216	PROTOTYPE: $
		1217	CODE:
		1218	RETVAL = boolSV (api_is_ready (self));
		1219	OUTPUT:
		1220	RETVAL
1105		1221
1106	int	1222	int
1107	nready(...)	1223	nready (...)
1108	PROTOTYPE:	1224	PROTOTYPE:
1109	CODE:	1225	CODE:
1110	RETVAL = coro_nready;	1226	RETVAL = coro_nready;
1111	OUTPUT:	1227	OUTPUT:
1112	RETVAL	1228	RETVAL
1113		1229
1114	void	1230	void
1115	schedule(...)	1231	_set_current (SV *current)
1116	PROTOTYPE:	1232	PROTOTYPE: $
1117	CODE:	1233	CODE:
1118	api_schedule ();	1234	SvREFCNT_dec (SvRV (coro_current));
		1235	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1236
		1237	MODULE = Coro::State PACKAGE = Coro::AIO
		1238
		1239	SV *
		1240	_get_state ()
		1241	CODE:
		1242	{
		1243	struct io_state *data;
		1244
		1245	RETVAL = newSV (sizeof (struct io_state));
		1246	data = (struct io_state *)SvPVX (RETVAL);
		1247	SvCUR_set (RETVAL, sizeof (struct io_state));
		1248	SvPOK_only (RETVAL);
		1249
		1250	data->errorno = errno;
		1251	data->laststype = PL_laststype;
		1252	data->laststatval = PL_laststatval;
		1253	data->statcache = PL_statcache;
		1254	}
		1255	OUTPUT:
		1256	RETVAL
1119		1257
1120	void	1258	void
1121	cede(...)	1259	_set_state (char *data_)
1122	PROTOTYPE:	1260	PROTOTYPE: $
1123	CODE:	1261	CODE:
1124	api_cede ();	1262	{
		1263	struct io_state data = (void )data_;
1125		1264
		1265	errno = data->errorno;
		1266	PL_laststype = data->laststype;
		1267	PL_laststatval = data->laststatval;
		1268	PL_statcache = data->statcache;
		1269	}
		1270

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Comparing Coro/Coro/State.xs (file contents): Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs. Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC