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Comparing Coro/Coro/State.xs (file contents):
Revision 1.24 by root, Tue Aug 14 14:56:22 2001 UTC vs.
Revision 1.133 by root, Thu Jan 4 20:14:19 2007 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 "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
7	#include <signal.h>	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
8		12
9	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
10	# include <unistd.h>	14	# include <unistd.h>
11	# include <sys/mman.h>	15	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
15	# else	19	# else
16	# undef HAVE_MMAP	20	# undef HAVE_MMAP
17	# endif	21	# endif
18	# endif	22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
19	#endif	30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
20		35
21	#define MAY_FLUSH /* increases codesize */	36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
22		39
23	#define SUB_INIT "Coro::State::initialize"	40	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	41	#define MAX_IDLE_CCTX 8
25		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
		50	# ifndef PL_ppaddr
		51	# define PL_ppaddr ppaddr
		52	# endif
		53	# ifndef call_sv
		54	# define call_sv perl_call_sv
		55	# endif
		56	# ifndef get_sv
		57	# define get_sv perl_get_sv
		58	# endif
		59	# ifndef get_cv
		60	# define get_cv perl_get_cv
		61	# endif
		62	# ifndef IS_PADGV
		63	# define IS_PADGV(v) 0
		64	# endif
		65	# ifndef IS_PADCONST
		66	# define IS_PADCONST(v) 0
		67	# endif
		68	#endif
		69
		70	/* 5.8.7 */
		71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
		74
		75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		76	# undef STACKGUARD
		77	#endif
		78
		79	#ifndef STACKGUARD
		80	# define STACKGUARD 0
		81	#endif
		82
		83	/* prefer perl internal functions over our own? */
		84	#ifndef PREFER_PERL_FUNCTIONS
		85	# define PREFER_PERL_FUNCTIONS 0
		86	#endif
		87
26	/* The next macro should delcare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
30		93
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		95
		96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		99	#else
		100	# define attribute(x)
		101	# define BARRIER
		102	#endif
		103
		104	#define NOINLINE attribute ((noinline))
32		105
33	#include "CoroAPI.h"	106	#include "CoroAPI.h"
34		107
		108	#ifdef USE_ITHREADS
		109	static perl_mutex coro_mutex;
		110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		112	#else
		113	# define LOCK (void)0
		114	# define UNLOCK (void)0
		115	#endif
		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
		124
35	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
		126	static AV *main_mainstack; /* used to differentiate between $main and others */
		127	static HV *coro_state_stash, *coro_stash;
		128	static SV *coro_mortal; /* will be freed after next transfer */
36		129
37	/* this is actually not only the c stack but also c registers etc... */	130	static struct coro_cctx *cctx_first;
		131	static int cctx_count, cctx_idle;
		132
		133	/* this is a structure representing a c-level coroutine */
38	typedef struct {	134	typedef struct coro_cctx {
39	int refcnt; /* pointer reference counter */	135	struct coro_cctx *next;
40	int usecnt; /* shared by how many coroutines */
41	int gencnt; /* generation counter */
42		136
43	coro_context cctx;	137	/* the stack */
44
45	void *sptr;	138	void *sptr;
46	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48		140
		141	/* cpu state */
		142	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		143	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		144	JMPENV *top_env;
		145	coro_context cctx;
		146
		147	int inuse;
		148
		149	#if USE_VALGRIND
		150	int valgrind_id;
		151	#endif
		152	} coro_cctx;
		153
		154	enum {
		155	CF_RUNNING = 0x0001, /* coroutine is running */
		156	CF_READY = 0x0002, /* coroutine is ready */
		157	CF_NEW = 0x0004, /* has never been switched to */
		158	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		159	};
		160
		161	/* this is a structure representing a perl-level coroutine */
49	struct coro {	162	struct coro {
50	/* the optional C context */	163	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	164	coro_cctx *cctx;
52	void *cursp;
53	int gencnt;
54
55	/* optionally saved, might be zero */
56	AV *defav;
57	SV *defsv;
58	SV *errsv;
59
60	/* saved global state not related to stacks */
61	U8 dowarn;
62	I32 in_eval;
63
64	/* the stacks and related info (callchain etc..) */
65	PERL_SI *curstackinfo;
66	AV *curstack;
67	AV *mainstack;
68	SV **stack_sp;
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91		165
92	/* data associated with this coroutine (initial args) */	166	/* data associated with this coroutine (initial args) */
93	AV *args;	167	AV *args;
		168	int refcnt;
		169	int save; /* CORO_SAVE flags */
		170	int flags; /* CF_ flags */
		171
		172	/* optionally saved, might be zero */
		173	AV *defav; /* @_ */
		174	SV *defsv; /* $_ */
		175	SV *errsv; /* $@ */
		176	SV *irssv; /* $/ */
		177	SV *irssv_sv; /* real $/ cache */
		178
		179	#define VAR(name,type) type name;
		180	# include "state.h"
		181	#undef VAR
		182
		183	/* coro process data */
		184	int prio;
94	};	185	};
95		186
96	typedef struct coro *Coro__State;	187	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	188	typedef struct coro *Coro__State_or_hashref;
98		189
99	static AV *main_mainstack; /* used to differentiate between $main and others */	190	static AV *
100	static HV *coro_state_stash;	191	coro_clone_padlist (CV *cv)
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104
105	/* mostly copied from op.c:cv_clone2 */
106	STATIC AV *
107	clone_padlist (AV *protopadlist)
108	{	192	{
109	AV *av;	193	AV *padlist = CvPADLIST (cv);
110	I32 ix;
111	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV *newpadlist, *newpad_name, *newpad;	194	AV *newpadlist, *newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127		195
128	newpadlist = newAV ();	196	newpadlist = newAV ();
129	AvREAL_off (newpadlist);	197	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);	198	#if PERL_VERSION_ATLEAST (5,9,0)
		199	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		200	#else
		201	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		202	#endif
		203	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		204	--AvFILLp (padlist);
		205
		206	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131	av_store (newpadlist, 1, (SV *) newpad);	207	av_store (newpadlist, 1, (SV *)newpad);
132		208
133	av = newAV (); /* will be @_ */	209	return newpadlist;
134	av_extend (av, 0);	210	}
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137		211
138	for (ix = fpad; ix > 0; ix--)	212	static void
		213	free_padlist (AV *padlist)
		214	{
		215	/* may be during global destruction */
		216	if (SvREFCNT (padlist))
139	{	217	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	218	I32 i = AvFILLp (padlist);
141	if (namesv && namesv != &PL_sv_undef)	219	while (i >= 0)
142	{	220	{
143	char *name = SvPVX (namesv); /* XXX */	221	SV **svp = av_fetch (padlist, i--, FALSE);
144	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	222	if (svp)
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}	223	{
148	else
149	{ /* our own lexical */
150	SV *sv;	224	SV *sv;
151	if (*name == '&')	225	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
152	sv = SvREFCNT_inc (ppad[ix]);	226	SvREFCNT_dec (sv);
153	else if (*name == '@')	227
154	sv = (SV *) newAV ();	228	SvREFCNT_dec (*svp);
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}	229	}
163	}	230	}
164	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165	{
166	npad[ix] = SvREFCNT_inc (ppad[ix]);
167	}
168	else
169	{
170	SV *sv = NEWSV (0, 0);
171	SvPADTMP_on (sv);
172	npad[ix] = sv;
173	}
174	}
175		231
176	#if 0 /* return -ENOTUNDERSTOOD */
177	/* Now that vars are all in place, clone nested closures. */
178
179	for (ix = fpad; ix > 0; ix--) {
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181	if (namesv
182	&& namesv != &PL_sv_undef
183	&& !(SvFLAGS(namesv) & SVf_FAKE)
184	&& *SvPVX(namesv) == '&'
185	&& CvCLONE(ppad[ix]))
186	{
187	CV *kid = cv_clone((CV*)ppad[ix]);
188	SvREFCNT_dec(ppad[ix]);
189	CvCLONE_on(kid);
190	SvPADMY_on(kid);
191	npad[ix] = (SV*)kid;
192	}
193	}
194	#endif
195
196	return newpadlist;
197	}
198
199	#ifdef MAY_FLUSH
200	STATIC AV *
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV *sv = svp ? *svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214
215	SvREFCNT_dec((SV*)padlist);	232	SvREFCNT_dec ((SV*)padlist);
216	}	233	}
217	}	234	}
218	#endif	235
		236	static int
		237	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		238	{
		239	AV *padlist;
		240	AV *av = (AV *)mg->mg_obj;
		241
		242	/* casting is fun. */
		243	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		244	free_padlist (padlist);
		245
		246	SvREFCNT_dec (av);
		247
		248	return 0;
		249	}
		250
		251	#define PERL_MAGIC_coro PERL_MAGIC_ext
		252
		253	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		254
		255	#define CORO_MAGIC(cv) \
		256	SvMAGIC (cv) \
		257	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		258	? SvMAGIC (cv) \
		259	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		260	: 0
219		261
220	/* the next two functions merely cache the padlists */	262	/* the next two functions merely cache the padlists */
221	STATIC void	263	static void
222	get_padlist (CV *cv)	264	get_padlist (CV *cv)
223	{	265	{
224	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	266	MAGIC *mg = CORO_MAGIC (cv);
		267	AV *av;
225		268
226	if (he && AvFILLp ((AV *)*he) >= 0)	269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
227	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
228	else	271	else
		272	{
		273	#if PREFER_PERL_FUNCTIONS
		274	/* this is probably cleaner, but also slower? */
		275	CV *cp = Perl_cv_clone (cv);
		276	CvPADLIST (cv) = CvPADLIST (cp);
		277	CvPADLIST (cp) = 0;
		278	SvREFCNT_dec (cp);
		279	#else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	280	CvPADLIST (cv) = coro_clone_padlist (cv);
		281	#endif
		282	}
230	}	283	}
231		284
232	STATIC void	285	static void
233	put_padlist (CV *cv)	286	put_padlist (CV *cv)
234	{	287	{
235	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
236		290
237	if (SvTYPE (*he) != SVt_PVAV)	291	if (!mg)
238	{
239	SvREFCNT_dec (*he);
240	*he = (SV *)newAV ();
241	}	292	{
242		293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
243	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
244	}	295	mg->mg_virtual = &vtbl_coro;
245		296	mg->mg_obj = (SV *)newAV ();
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{	297	}
255	HE *he;
256	AV *padlist;
257		298
258	while (!!(he = hv_iternext (hv)))	299	av = (AV *)mg->mg_obj;
259	{
260	AV *av = (AV *)HeVAL(he);
261		300
262	/* casting is fun. */	301	if (AvFILLp (av) >= AvMAX (av))
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	302	av_extend (av, AvMAX (av) + 1);
264	free_padlist (padlist);
265	}
266	}
267		303
268	SvREFCNT_dec (hv);	304	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	305	}
270	#endif
271		306
272	#define SB do {	307	#define SB do {
273	#define SE } while (0)	308	#define SE } while (0)
274		309
275	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
279		311
280	static void	312	static void
281	load_state(pTHX_ Coro__State c)	313	load_perl (Coro__State c)
282	{	314	{
283	PL_dowarn = c->dowarn;	315	#define VAR(name,type) PL_ ## name = c->name;
284	PL_in_eval = c->in_eval;	316	# include "state.h"
285		317	#undef VAR
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312		318
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	319	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	320	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	321	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		322	if (c->irssv)
		323	{
		324	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		325	SvREFCNT_dec (c->irssv);
		326	else
		327	{
		328	REPLACE_SV (PL_rs, c->irssv);
		329	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		330	sv_setsv (c->irssv_sv, PL_rs);
		331	}
		332	}
316		333
317	{	334	{
318	dSP;	335	dSP;
319	CV *cv;	336	CV *cv;
320		337
321	/* now do the ugly restore mess */	338	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))	339	while ((cv = (CV *)POPs))
323	{	340	{
324	AV *padlist = (AV *)POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;	342	CvDEPTH (cv) = PTR2IV (POPs);
330	#ifdef USE_THREADS	343	CvPADLIST (cv) = (AV *)POPs;
331	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}	344	}
337		345
338	PUTBACK;	346	PUTBACK;
339	}	347	}
340	}	348	}
341		349
342	static void	350	static void
343	save_state(pTHX_ Coro__State c, int flags)	351	save_perl (Coro__State c)
344	{	352	{
345	{	353	{
346	dSP;	354	dSP;
347	I32 cxix = cxstack_ix;	355	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;	356	PERL_CONTEXT *ccstk = cxstack;
…		…
351	/*	359	/*
352	* the worst thing you can imagine happens first - we have to save	360	* the worst thing you can imagine happens first - we have to save
353	* (and reinitialize) all cv's in the whole callchain :(	361	* (and reinitialize) all cv's in the whole callchain :(
354	*/	362	*/
355		363
		364	EXTEND (SP, 3 + 1);
356	PUSHs (Nullsv);	365	PUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */	366	/* this loop was inspired by pp_caller */
358	for (;;)	367	for (;;)
359	{	368	{
360	do	369	while (cxix >= 0)
361	{	370	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];	371	PERL_CONTEXT *cx = &ccstk[cxix--];
363		372
364	if (CxTYPE(cx) == CXt_SUB)	373	if (CxTYPE (cx) == CXt_SUB)
365	{	374	{
366	CV *cv = cx->blk_sub.cv;	375	CV *cv = cx->blk_sub.cv;
		376
367	if (CvDEPTH(cv))	377	if (CvDEPTH (cv))
368	{	378	{
369	#ifdef USE_THREADS
370	/*XPUSHs ((SV *)CvOWNER(cv));*/
371	/*CvOWNER(cv) = 0;*/
372	/*error must unlock this cv etc.. etc...*/
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, 3);
375
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382
383	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST (cv));
		381	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384	PUSHs ((SV *)cv);	382	PUSHs ((SV *)cv);
385		383
		384	CvDEPTH (cv) = 0;
386	get_padlist (cv); /* this is a monster */	385	get_padlist (cv);
387	}	386	}
388	}	387	}
389	else if (CxTYPE(cx) == CXt_FORMAT)
390	{
391	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}
395	}	388	}
396	while (cxix >= 0);
397		389
398	if (top_si->si_type == PERLSI_MAIN)	390	if (top_si->si_type == PERLSI_MAIN)
399	break;	391	break;
400		392
401	top_si = top_si->si_prev;	393	top_si = top_si->si_prev;
…		…
404	}	396	}
405		397
406	PUTBACK;	398	PUTBACK;
407	}	399	}
408		400
409	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	401	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	402	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	403	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		404	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
412		405
413	/* I have not the slightest idea of why av_reify is necessary */	406	#define VAR(name,type)c->name = PL_ ## name;
414	/* but if it's missing the defav contents magically get replaced sometimes */	407	# include "state.h"
415	if (c->defav)	408	#undef VAR
416	av_reify (c->defav);
417
418	c->dowarn = PL_dowarn;
419	c->in_eval = PL_in_eval;
420
421	c->curstackinfo = PL_curstackinfo;
422	c->curstack = PL_curstack;
423	c->mainstack = PL_mainstack;
424	c->stack_sp = PL_stack_sp;
425	c->op = PL_op;
426	c->curpad = PL_curpad;
427	c->stack_base = PL_stack_base;
428	c->stack_max = PL_stack_max;
429	c->tmps_stack = PL_tmps_stack;
430	c->tmps_floor = PL_tmps_floor;
431	c->tmps_ix = PL_tmps_ix;
432	c->tmps_max = PL_tmps_max;
433	c->markstack = PL_markstack;
434	c->markstack_ptr = PL_markstack_ptr;
435	c->markstack_max = PL_markstack_max;
436	c->scopestack = PL_scopestack;
437	c->scopestack_ix = PL_scopestack_ix;
438	c->scopestack_max = PL_scopestack_max;
439	c->savestack = PL_savestack;
440	c->savestack_ix = PL_savestack_ix;
441	c->savestack_max = PL_savestack_max;
442	c->retstack = PL_retstack;
443	c->retstack_ix = PL_retstack_ix;
444	c->retstack_max = PL_retstack_max;
445	c->curcop = PL_curcop;
446	c->top_env = PL_top_env;
447	}	409	}
448		410
449	/*	411	/*
450	* allocate various perl stacks. This is an exact copy	412	* allocate various perl stacks. This is an exact copy
451	* of perl.c:init_stacks, except that it uses less memory	413	* of perl.c:init_stacks, except that it uses less memory
452	* on the assumption that coroutines do not usually need	414	* on the (sometimes correct) assumption that coroutines do
453	* a lot of stackspace.	415	* not usually need a lot of stackspace.
454	*/	416	*/
455	STATIC void	417	#if PREFER_PERL_FUNCTIONS
		418	# define coro_init_stacks init_stacks
		419	#else
		420	static void
456	coro_init_stacks (pTHX)	421	coro_init_stacks ()
457	{	422	{
458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
459	PL_curstackinfo->si_type = PERLSI_MAIN;	424	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;	425	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462		427
463	PL_stack_base = AvARRAY(PL_curstack);	428	PL_stack_base = AvARRAY(PL_curstack);
464	PL_stack_sp = PL_stack_base;	429	PL_stack_sp = PL_stack_base;
465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466		431
467	New(50,PL_tmps_stack,96,SV*);	432	New(50,PL_tmps_stack,128,SV*);
468	PL_tmps_floor = -1;	433	PL_tmps_floor = -1;
469	PL_tmps_ix = -1;	434	PL_tmps_ix = -1;
470	PL_tmps_max = 96;	435	PL_tmps_max = 128;
471		436
472	New(54,PL_markstack,16,I32);	437	New(54,PL_markstack,32,I32);
473	PL_markstack_ptr = PL_markstack;	438	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;	439	PL_markstack_max = PL_markstack + 32;
475		440
		441	#ifdef SET_MARK_OFFSET
476	SET_MARK_OFFSET;	442	SET_MARK_OFFSET;
		443	#endif
477		444
478	New(54,PL_scopestack,16,I32);	445	New(54,PL_scopestack,32,I32);
479	PL_scopestack_ix = 0;	446	PL_scopestack_ix = 0;
480	PL_scopestack_max = 16;	447	PL_scopestack_max = 32;
481		448
482	New(54,PL_savestack,96,ANY);	449	New(54,PL_savestack,64,ANY);
483	PL_savestack_ix = 0;	450	PL_savestack_ix = 0;
484	PL_savestack_max = 96;	451	PL_savestack_max = 64;
485		452
		453	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	454	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	455	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	456	PL_retstack_max = 16;
		457	#endif
489	}	458	}
		459	#endif
490		460
491	/*	461	/*
492	* destroy the stacks, the callchain etc...	462	* destroy the stacks, the callchain etc...
493	* still there is a memleak of 128 bytes...
494	*/	463	*/
495	STATIC void	464	static void
496	destroy_stacks(pTHX)	465	coro_destroy_stacks ()
497	{	466	{
498	/* is this ugly, I ask? */	467	if (!IN_DESTRUCT)
499	while (PL_scopestack_ix)	468	{
500	LEAVE;	469	/* restore all saved variables and stuff */
		470	LEAVE_SCOPE (0);
		471	assert (PL_tmps_floor == -1);
501		472
502	/* sure it is, but more important: is it correct?? :/ */	473	/* free all temporaries */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;	474	FREETMPS;
		475	assert (PL_tmps_ix == -1);
		476
		477	POPSTACK_TO (PL_mainstack);
		478	}
505		479
506	while (PL_curstackinfo->si_next)	480	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	481	PL_curstackinfo = PL_curstackinfo->si_next;
508		482
509	while (PL_curstackinfo)	483	while (PL_curstackinfo)
510	{	484	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	485	PERL_SI *p = PL_curstackinfo->si_prev;
512		486
513	{	487	if (!IN_DESTRUCT)
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520	dounwind(-1);
521
522	SvREFCNT_dec(PL_curstackinfo->si_stack);	488	SvREFCNT_dec (PL_curstackinfo->si_stack);
		489
523	Safefree(PL_curstackinfo->si_cxstack);	490	Safefree (PL_curstackinfo->si_cxstack);
524	Safefree(PL_curstackinfo);	491	Safefree (PL_curstackinfo);
525	PL_curstackinfo = p;	492	PL_curstackinfo = p;
526	}	493	}
527		494
528	Safefree(PL_tmps_stack);	495	Safefree (PL_tmps_stack);
529	Safefree(PL_markstack);	496	Safefree (PL_markstack);
530	Safefree(PL_scopestack);	497	Safefree (PL_scopestack);
531	Safefree(PL_savestack);	498	Safefree (PL_savestack);
		499	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree(PL_retstack);	500	Safefree (PL_retstack);
533	}
534
535	static void
536	allocate_stack (Coro__State ctx, int alloc)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545	if (alloc)
546	{
547	#ifdef HAVE_MMAP
548	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550	if (stack->sptr == (void *)-1)
551	#endif	501	#endif
552	{
553	/*FIXME*//*D*//* reasonable stack size! */
554	stack->ssize = -4096 * sizeof (long);
555	New (0, stack->sptr, 4096, long);
556	}
557	}
558	else
559	stack->sptr = 0;
560
561	ctx->stack = stack;
562	}	502	}
563		503
564	static void	504	static void
565	deallocate_stack (Coro__State ctx)	505	setup_coro (struct coro *coro)
566	{
567	coro_stack *stack = ctx->stack;
568
569	ctx->stack = 0;
570
571	if (stack)
572	{
573	if (!--stack->refcnt)
574	{
575	#ifdef HAVE_MMAP
576	if (stack->ssize > 0 && stack->sptr)
577	munmap (stack->sptr, stack->ssize);
578	else
579	#else
580	Safefree (stack->sptr);
581	#endif
582	Safefree (stack);
583	}
584	else if (ctx->gencnt == stack->gencnt)
585	--stack->usecnt;
586	}
587	}
588
589	static void
590	setup_coro (void *arg)
591	{	506	{
592	/*	507	/*
593	* emulate part of the perl startup here.	508	* emulate part of the perl startup here.
594	*/	509	*/
		510
		511	coro_init_stacks ();
		512
		513	PL_curcop = &PL_compiling;
		514	PL_in_eval = EVAL_NULL;
		515	PL_curpm = 0;
		516	PL_localizing = 0;
		517	PL_dirty = 0;
		518	PL_restartop = 0;
		519
		520	{
		521	dSP;
		522	LOGOP myop;
		523
		524	SvREFCNT_dec (GvAV (PL_defgv));
		525	GvAV (PL_defgv) = coro->args; coro->args = 0;
		526
		527	Zero (&myop, 1, LOGOP);
		528	myop.op_next = Nullop;
		529	myop.op_flags = OPf_WANT_VOID;
		530
		531	PUSHMARK (SP);
		532	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		533	PUTBACK;
		534	PL_op = (OP *)&myop;
		535	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		536	SPAGAIN;
		537	}
		538
		539	ENTER; /* necessary e.g. for dounwind */
		540	}
		541
		542	static void
		543	free_coro_mortal ()
		544	{
		545	if (coro_mortal)
		546	{
		547	SvREFCNT_dec (coro_mortal);
		548	coro_mortal = 0;
		549	}
		550	}
		551
		552	/* inject a fake call to Coro::State::_cctx_init into the execution */
		553	static void NOINLINE
		554	prepare_cctx (coro_cctx *cctx)
		555	{
595	dSP;	556	dSP;
596	Coro__State ctx = (Coro__State)arg;	557	LOGOP myop;
597	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598		558
599	coro_init_stacks (aTHX);	559	Zero (&myop, 1, LOGOP);
600	/*PL_curcop = 0;*/	560	myop.op_next = PL_op;
601	/*PL_in_eval = PL_in_eval;*/ /* inherit */	561	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
602	SvREFCNT_dec (GvAV (PL_defgv));
603	GvAV (PL_defgv) = ctx->args;
604		562
		563	PUSHMARK (SP);
		564	EXTEND (SP, 2);
		565	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		566	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		567	PUTBACK;
		568	PL_op = (OP *)&myop;
		569	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
605	SPAGAIN;	570	SPAGAIN;
606
607	if (ctx->stack)
608	{
609	ctx->cursp = 0;
610
611	PUSHMARK(SP);
612	PUTBACK;
613	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
614
615	if (SvTRUE (ERRSV))
616	croak (NULL);
617	else
618	croak ("FATAL: CCTXT coroutine returned!");
619	}
620	else
621	{
622	UNOP myop;
623
624	PL_op = (OP *)&myop;
625
626	Zero(&myop, 1, UNOP);
627	myop.op_next = Nullop;
628	myop.op_flags = OPf_WANT_VOID;
629
630	PUSHMARK(SP);
631	XPUSHs (sub_init);
632	/*
633	* the next line is slightly wrong, as PL_op->op_next
634	* is actually being executed so we skip the first op.
635	* that doesn't matter, though, since it is only
636	* pp_nextstate and we never return...
637	* ah yes, and I don't care anyways ;)
638	*/
639	PUTBACK;
640	PL_op = pp_entersub();
641	SPAGAIN;
642
643	ENTER; /* necessary e.g. for dounwind */
644	}
645	}	571	}
646		572
647	static void	573	static void
648	continue_coro (void *arg)	574	coro_run (void *arg)
649	{	575	{
		576	/* coro_run is the alternative tail of transfer(), so unlock here. */
		577	UNLOCK;
		578
650	/*	579	/*
651	* this is a _very_ stripped down perl interpreter ;)	580	* this is a _very_ stripped down perl interpreter ;)
652	*/	581	*/
653	Coro__State ctx = (Coro__State)arg;	582	PL_top_env = &PL_start_env;
654		583
655	/*FIXME*//* must set up top_env here */	584	/* inject call to cctx_init */
656	ctx->cursp = 0;	585	prepare_cctx ((coro_cctx *)arg);
657	PL_op = PL_op->op_next;
658	CALLRUNOPS(aTHX);
659		586
		587	/* somebody will hit me for both perl_run and PL_restartop */
		588	PL_restartop = PL_op;
		589	perl_run (PL_curinterp);
		590
		591	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
660	abort ();	592	abort ();
661	}	593	}
662		594
663	STATIC void	595	static coro_cctx *
		596	cctx_new ()
		597	{
		598	coro_cctx *cctx;
		599
		600	++cctx_count;
		601
		602	Newz (0, cctx, 1, coro_cctx);
		603
		604	#if HAVE_MMAP
		605
		606	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		607	/* mmap supposedly does allocate-on-write for us */
		608	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		609
		610	if (cctx->sptr == (void *)-1)
		611	{
		612	perror ("FATAL: unable to mmap stack for coroutine");
		613	_exit (EXIT_FAILURE);
		614	}
		615
		616	# if STACKGUARD
		617	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		618	# endif
		619
		620	#else
		621
		622	cctx->ssize = STACKSIZE * (long)sizeof (long);
		623	New (0, cctx->sptr, STACKSIZE, long);
		624
		625	if (!cctx->sptr)
		626	{
		627	perror ("FATAL: unable to malloc stack for coroutine");
		628	_exit (EXIT_FAILURE);
		629	}
		630
		631	#endif
		632
		633	#if USE_VALGRIND
		634	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		635	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		636	cctx->ssize + (char *)cctx->sptr
		637	);
		638	#endif
		639
		640	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		641
		642	return cctx;
		643	}
		644
		645	static void
		646	cctx_destroy (coro_cctx *cctx)
		647	{
		648	if (!cctx)
		649	return;
		650
		651	--cctx_count;
		652
		653	#if USE_VALGRIND
		654	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		655	#endif
		656
		657	#if HAVE_MMAP
		658	munmap (cctx->sptr, cctx->ssize);
		659	#else
		660	Safefree (cctx->sptr);
		661	#endif
		662
		663	Safefree (cctx);
		664	}
		665
		666	static coro_cctx *
		667	cctx_get ()
		668	{
		669	coro_cctx *cctx;
		670
		671	if (cctx_first)
		672	{
		673	cctx = cctx_first;
		674	cctx_first = cctx->next;
		675	--cctx_idle;
		676	}
		677	else
		678	{
		679	cctx = cctx_new ();
		680	PL_op = PL_op->op_next;
		681	}
		682
		683	return cctx;
		684	}
		685
		686	static void
		687	cctx_put (coro_cctx *cctx)
		688	{
		689	/* free another cctx if overlimit */
		690	if (cctx_idle >= MAX_IDLE_CCTX)
		691	{
		692	coro_cctx *first = cctx_first;
		693	cctx_first = first->next;
		694	--cctx_idle;
		695
		696	assert (!first->inuse);
		697	cctx_destroy (first);
		698	}
		699
		700	++cctx_idle;
		701	cctx->next = cctx_first;
		702	cctx_first = cctx;
		703	}
		704
		705	/* never call directly, always through the coro_state_transfer global variable */
		706	static void NOINLINE
664	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	707	transfer (struct coro *prev, struct coro *next)
665	{	708	{
666	dSP;
667	dSTACKLEVEL;	709	dSTACKLEVEL;
668		710
		711	/* sometimes transfer is only called to set idle_sp */
		712	if (!next)
		713	{
		714	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		715	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		716	}
669	if (prev != next)	717	else if (prev != next)
670	{	718	{
671	if (next->mainstack)	719	coro_cctx *prev__cctx;
		720
		721	if (prev->flags & CF_NEW)
672	{	722	{
673	SAVE (prev, flags);	723	/* create a new empty context */
674	LOAD (next);	724	Newz (0, prev->cctx, 1, coro_cctx);
675		725	prev->cctx->inuse = 1;
676	/* mark this state as in-use */	726	prev->flags &= ~CF_NEW;
677	next->mainstack = 0;	727	prev->flags |= CF_RUNNING;
678	next->tmps_ix = -2;
679
680	/* stacklevel changed? if yes, grab the stack for us! */
681	if (flags & TRANSFER_SAVE_CCTXT)
682	{
683	if (!prev->stack)
684	allocate_stack (prev, 0);
685	else if (prev->cursp != stacklevel
686	&& prev->stack->usecnt > 1)
687	{
688	prev->gencnt = ++prev->stack->gencnt;
689	prev->stack->usecnt = 1;
690	}
691
692	/* has our stack been invalidated? */
693	if (next->stack && next->stack->gencnt != next->gencnt)
694	{
695	deallocate_stack (next);
696	allocate_stack (next, 1);
697	coro_create (&(next->stack->cctx),
698	continue_coro, (void *)next,
699	next->stack->sptr, labs (next->stack->ssize));
700	}
701
702	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703	}
704
705	}	728	}
706	else if (next->tmps_ix == -2)	729
707	croak ("tried to transfer to running coroutine");	730	/*TODO: must not croak here */
		731	if (!prev->flags & CF_RUNNING)
		732	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		733
		734	if (next->flags & CF_RUNNING)
		735	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		736
		737	if (next->flags & CF_DESTROYED)
		738	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		739
		740	prev->flags &= ~CF_RUNNING;
		741	next->flags |= CF_RUNNING;
		742
		743	LOCK;
		744
		745	if (next->flags & CF_NEW)
		746	{
		747	/* need to start coroutine */
		748	next->flags &= ~CF_NEW;
		749	/* first get rid of the old state */
		750	save_perl (prev);
		751	/* setup coroutine call */
		752	setup_coro (next);
		753	/* need a new stack */
		754	assert (!next->cctx);
		755	}
708	else	756	else
709	{	757	{
710	SAVE (prev, -1); /* first get rid of the old state */	758	/* coroutine already started */
711		759	save_perl (prev);
712	if (flags & TRANSFER_SAVE_CCTXT)	760	load_perl (next);
713	{
714	if (!prev->stack)
715	allocate_stack (prev, 0);
716
717	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718	{
719	setup_coro (next);
720
721	prev->stack->refcnt++;
722	prev->stack->usecnt++;
723	next->stack = prev->stack;
724	next->gencnt = prev->gencnt;
725	}
726	else
727	{
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	setup_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	}
734	}
735	else
736	setup_coro (next);
737	}	761	}
		762
		763	prev__cctx = prev->cctx;
		764
		765	/* possibly "free" the cctx */
		766	if (prev__cctx->idle_sp == STACKLEVEL)
		767	{
		768	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		769	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		770
		771	prev->cctx = 0;
		772
		773	cctx_put (prev__cctx);
		774	prev__cctx->inuse = 0;
		775	}
		776
		777	if (!next->cctx)
		778	{
		779	next->cctx = cctx_get ();
		780	assert (!next->cctx->inuse);
		781	next->cctx->inuse = 1;
		782	}
		783
		784	if (prev__cctx != next->cctx)
		785	{
		786	prev__cctx->top_env = PL_top_env;
		787	PL_top_env = next->cctx->top_env;
		788	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		789	}
		790
		791	free_coro_mortal ();
		792	UNLOCK;
		793	}
		794	}
		795
		796	struct transfer_args
		797	{
		798	struct coro *prev, *next;
		799	};
		800
		801	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		802
		803	static int
		804	coro_state_destroy (struct coro *coro)
		805	{
		806	if (coro->refcnt--)
		807	return 0;
		808
		809	if (coro->flags & CF_DESTROYED)
		810	return 0;
		811
		812	coro->flags |= CF_DESTROYED;
		813
		814	if (coro->mainstack && coro->mainstack != main_mainstack)
738	}	815	{
		816	assert (!(coro->flags & CF_RUNNING));
739		817
740	next->cursp = stacklevel;	818	struct coro temp;
		819	Zero (&temp, 1, struct coro);
		820	temp.save = CORO_SAVE_ALL;
		821
		822	if (coro->flags & CF_RUNNING)
		823	croak ("FATAL: tried to destroy currently running coroutine");
		824
		825	save_perl (&temp);
		826	load_perl (coro);
		827
		828	coro_destroy_stacks ();
		829
		830	load_perl (&temp); /* this will get rid of defsv etc.. */
		831
		832	coro->mainstack = 0;
		833	}
		834
		835	cctx_destroy (coro->cctx);
		836	SvREFCNT_dec (coro->args);
		837
		838	return 1;
741	}	839	}
		840
		841	static int
		842	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		843	{
		844	struct coro *coro = (struct coro *)mg->mg_ptr;
		845	mg->mg_ptr = 0;
		846
		847	coro_state_destroy (coro);
		848
		849	if (!coro->refcnt)
		850	Safefree (coro);
		851
		852	return 0;
		853	}
		854
		855	static int
		856	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		857	{
		858	struct coro *coro = (struct coro *)mg->mg_ptr;
		859
		860	++coro->refcnt;
		861
		862	return 0;
		863	}
		864
		865	static MGVTBL coro_state_vtbl = {
		866	0, 0, 0, 0,
		867	coro_state_clear,
		868	0,
		869	#ifdef MGf_DUP
		870	coro_state_dup,
		871	#else
		872	# define MGf_DUP 0
		873	#endif
		874	};
742		875
743	static struct coro *	876	static struct coro *
744	sv_to_coro (SV *arg, const char *funcname, const char *varname)	877	SvSTATE (SV *coro)
745	{	878	{
746	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	879	HV *stash;
747	{	880	MAGIC *mg;
748	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
749		881
750	if (!he)	882	if (SvROK (coro))
751	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	883	coro = SvRV (coro);
752		884
753	arg = HeVAL(he);	885	stash = SvSTASH (coro);
		886	if (stash != coro_stash && stash != coro_state_stash)
754	}	887	{
		888	/* very slow, but rare, check */
		889	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		890	croak ("Coro::State object required");
755		891	}
756	/* must also be changed inside Coro::Cont::yield */
757	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758	return (struct coro *) SvIV((SV*)SvRV(arg));
759	else
760	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761	}
762		892
		893	mg = SvMAGIC (coro);
		894	assert (mg->mg_type == PERL_MAGIC_ext);
		895	return (struct coro *)mg->mg_ptr;
		896	}
		897
		898	static void
		899	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		900	{
		901	ta->prev = SvSTATE (prev_sv);
		902	ta->next = SvSTATE (next_sv);
		903	}
		904
		905	static void
		906	api_transfer (SV *prev_sv, SV *next_sv)
		907	{
		908	struct transfer_args ta;
		909
		910	prepare_transfer (&ta, prev_sv, next_sv);
		911	TRANSFER (ta);
		912	}
		913
763	static void	914	static int
764	api_transfer(pTHX_ SV *prev, SV *next, int flags)	915	api_save (SV *coro_sv, int new_save)
765	{	916	{
766	transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),	917	struct coro *coro = SvSTATE (coro_sv);
767	sv_to_coro (next, "Coro::transfer", "next"),	918	int old_save = coro->save;
768	flags);	919
		920	if (new_save >= 0)
		921	coro->save = new_save;
		922
		923	return old_save;
769	}	924	}
770		925
771	/** Coro ********************************************************************/	926	/** Coro ********************************************************************/
772		927
773	#define PRIO_MAX 3	928	#define PRIO_MAX 3
…		…
776	#define PRIO_LOW -1	931	#define PRIO_LOW -1
777	#define PRIO_IDLE -3	932	#define PRIO_IDLE -3
778	#define PRIO_MIN -4	933	#define PRIO_MIN -4
779		934
780	/* for Coro.pm */	935	/* for Coro.pm */
781	static GV *coro_current, *coro_idle;	936	static SV *coro_current;
782	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	937	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		938	static int coro_nready;
783		939
784	static void	940	static void
785	coro_enq (SV *sv)	941	coro_enq (SV *coro_sv)
786	{	942	{
787	if (SvROK (sv))	943	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
788	{	944	coro_nready++;
789	SV *hv = SvRV (sv);
790	if (SvTYPE (hv) == SVt_PVHV)
791	{
792	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
793	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
794
795	prio = prio > PRIO_MAX ? PRIO_MAX
796	: prio < PRIO_MIN ? PRIO_MIN
797	: prio;
798
799	av_push (coro_ready [prio - PRIO_MIN], sv);
800
801	return;
802	}
803	}
804
805	croak ("Coro::ready tried to enqueue something that is not a coroutine");
806	}	945	}
807		946
808	static SV *	947	static SV *
809	coro_deq (int min_prio)	948	coro_deq (int min_prio)
810	{	949	{
…		…
813	min_prio -= PRIO_MIN;	952	min_prio -= PRIO_MIN;
814	if (min_prio < 0)	953	if (min_prio < 0)
815	min_prio = 0;	954	min_prio = 0;
816		955
817	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	956	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
818	if (av_len (coro_ready[prio]) >= 0)	957	if (AvFILLp (coro_ready [prio]) >= 0)
		958	{
		959	coro_nready--;
819	return av_shift (coro_ready[prio]);	960	return av_shift (coro_ready [prio]);
		961	}
820		962
821	return 0;	963	return 0;
822	}	964	}
823		965
824	static void	966	static int
825	api_ready (SV *coro)	967	api_ready (SV *coro_sv)
826	{	968	{
		969	struct coro *coro;
		970
		971	if (SvROK (coro_sv))
		972	coro_sv = SvRV (coro_sv);
		973
		974	coro = SvSTATE (coro_sv);
		975
		976	if (coro->flags & CF_READY)
		977	return 0;
		978
		979	coro->flags |= CF_READY;
		980
		981	LOCK;
827	coro_enq (SvREFCNT_inc (coro));	982	coro_enq (SvREFCNT_inc (coro_sv));
828	}	983	UNLOCK;
829		984
		985	return 1;
		986	}
		987
830	static void	988	static int
831	api_schedule (int cede)	989	api_is_ready (SV *coro_sv)
832	{	990	{
		991	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		992	}
		993
		994	static void
		995	prepare_schedule (struct transfer_args *ta)
		996	{
833	SV *prev, *next;	997	SV *prev_sv, *next_sv;
834		998
835	prev = GvSV (coro_current);	999	for (;;)
836		1000	{
837	if (cede)	1001	LOCK;
838	coro_enq (SvREFCNT_inc (prev));
839
840	next = coro_deq (PRIO_MIN);	1002	next_sv = coro_deq (PRIO_MIN);
		1003	UNLOCK;
841		1004
		1005	/* nothing to schedule: call the idle handler */
842	if (!next)	1006	if (!next_sv)
843	next = SvREFCNT_inc (GvSV (coro_idle));	1007	{
		1008	dSP;
844		1009
845	GvSV (coro_current) = SvREFCNT_inc (next);	1010	ENTER;
846	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),	1011	SAVETMPS;
847	sv_to_coro (next, "Coro::schedule", "next coroutine"),	1012
848	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	1013	PUSHMARK (SP);
		1014	PUTBACK;
		1015	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1016
		1017	FREETMPS;
		1018	LEAVE;
		1019	continue;
		1020	}
		1021
		1022	ta->next = SvSTATE (next_sv);
		1023
		1024	/* cannot transfer to destroyed coros, skip and look for next */
		1025	if (ta->next->flags & CF_DESTROYED)
		1026	{
849	SvREFCNT_dec (next);	1027	SvREFCNT_dec (next_sv);
850	SvREFCNT_dec (prev);	1028	continue;
		1029	}
		1030
		1031	break;
		1032	}
		1033
		1034	/* free this only after the transfer */
		1035	prev_sv = SvRV (coro_current);
		1036	SvRV_set (coro_current, next_sv);
		1037	ta->prev = SvSTATE (prev_sv);
		1038
		1039	assert (ta->next->flags & CF_READY);
		1040	ta->next->flags &= ~CF_READY;
		1041
		1042	LOCK;
		1043	free_coro_mortal ();
		1044	coro_mortal = prev_sv;
		1045	UNLOCK;
		1046	}
		1047
		1048	static void
		1049	prepare_cede (struct transfer_args *ta)
		1050	{
		1051	api_ready (coro_current);
		1052	prepare_schedule (ta);
		1053	}
		1054
		1055	static int
		1056	prepare_cede_notself (struct transfer_args *ta)
		1057	{
		1058	if (coro_nready)
		1059	{
		1060	SV *prev = SvRV (coro_current);
		1061	prepare_schedule (ta);
		1062	api_ready (prev);
		1063	return 1;
		1064	}
		1065	else
		1066	return 0;
		1067	}
		1068
		1069	static void
		1070	api_schedule (void)
		1071	{
		1072	struct transfer_args ta;
		1073
		1074	prepare_schedule (&ta);
		1075	TRANSFER (ta);
		1076	}
		1077
		1078	static int
		1079	api_cede (void)
		1080	{
		1081	struct transfer_args ta;
		1082
		1083	prepare_cede (&ta);
		1084
		1085	if (ta.prev != ta.next)
		1086	{
		1087	TRANSFER (ta);
		1088	return 1;
		1089	}
		1090	else
		1091	return 0;
		1092	}
		1093
		1094	static int
		1095	api_cede_notself (void)
		1096	{
		1097	struct transfer_args ta;
		1098
		1099	if (prepare_cede_notself (&ta))
		1100	{
		1101	TRANSFER (ta);
		1102	return 1;
		1103	}
		1104	else
		1105	return 0;
851	}	1106	}
852		1107
853	MODULE = Coro::State PACKAGE = Coro::State	1108	MODULE = Coro::State PACKAGE = Coro::State
854		1109
855	PROTOTYPES: ENABLE	1110	PROTOTYPES: DISABLE
856		1111
857	BOOT:	1112	BOOT:
858	{ /* {} necessary for stoopid perl-5.6.x */	1113	{
859	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1114	#ifdef USE_ITHREADS
860	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1115	MUTEX_INIT (&coro_mutex);
		1116	#endif
		1117	BOOT_PAGESIZE;
		1118
861	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1119	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
862		1120
863	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1121	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
864	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1122	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
865	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1123	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1124	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
866	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1125	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
867
868	if (!padlist_cache)
869	padlist_cache = newHV ();
870		1126
871	main_mainstack = PL_mainstack;	1127	main_mainstack = PL_mainstack;
872		1128
873	{
874	SV *sv = perl_get_sv("Coro::API", 1);
875
876	coroapi.ver = CORO_API_VERSION - 1;	1129	coroapi.ver = CORO_API_VERSION;
877	coroapi.transfer = api_transfer;	1130	coroapi.transfer = api_transfer;
878	coroapi.schedule = api_schedule;
879	coroapi.ready = api_ready;
880		1131
881	GCoroAPI = &coroapi;	1132	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
882	sv_setiv(sv, (IV)&coroapi);
883	SvREADONLY_on(sv);
884	}
885	}	1133	}
886		1134
887	Coro::State	1135	SV *
888	_newprocess(args)	1136	new (char *klass, ...)
889	SV * args
890	PROTOTYPE: $
891	CODE:	1137	CODE:
892	Coro__State coro;	1138	{
		1139	struct coro *coro;
		1140	HV *hv;
		1141	int i;
893		1142
894	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
895	croak ("Coro::State::_newprocess expects an arrayref");
896
897	New (0, coro, 1, struct coro);	1143	Newz (0, coro, 1, struct coro);
		1144	coro->args = newAV ();
		1145	coro->save = CORO_SAVE_ALL;
		1146	coro->flags = CF_NEW;
898		1147
899	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1148	hv = newHV ();
900	coro->mainstack = 0; /* actual work is done inside transfer */	1149	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
901	coro->stack = 0;	1150	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
902		1151
903	RETVAL = coro;	1152	for (i = 1; i < items; i++)
		1153	av_push (coro->args, newSVsv (ST (i)));
		1154	}
904	OUTPUT:	1155	OUTPUT:
905	RETVAL	1156	RETVAL
906		1157
		1158	int
		1159	save (SV *coro, int new_save = -1)
		1160	CODE:
		1161	RETVAL = api_save (coro, new_save);
		1162	OUTPUT:
		1163	RETVAL
		1164
907	void	1165	void
908	transfer(prev, next, flags)	1166	_set_stacklevel (...)
909	Coro::State_or_hashref prev	1167	ALIAS:
910	Coro::State_or_hashref next	1168	Coro::State::transfer = 1
911	int flags	1169	Coro::schedule = 2
912	PROTOTYPE: @	1170	Coro::cede = 3
		1171	Coro::cede_notself = 4
913	CODE:	1172	CODE:
914	PUTBACK;	1173	{
915	transfer (aTHX_ prev, next, flags);	1174	struct transfer_args ta;
916	SPAGAIN;	1175
		1176	switch (ix)
		1177	{
		1178	case 0:
		1179	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1180	ta.next = 0;
		1181	break;
		1182
		1183	case 1:
		1184	if (items != 2)
		1185	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1186
		1187	prepare_transfer (&ta, ST (0), ST (1));
		1188	break;
		1189
		1190	case 2:
		1191	prepare_schedule (&ta);
		1192	break;
		1193
		1194	case 3:
		1195	prepare_cede (&ta);
		1196	break;
		1197
		1198	case 4:
		1199	if (!prepare_cede_notself (&ta))
		1200	XSRETURN_EMPTY;
		1201
		1202	break;
		1203	}
		1204
		1205	BARRIER;
		1206	TRANSFER (ta);
		1207	}
		1208
		1209	bool
		1210	_destroy (SV *coro_sv)
		1211	CODE:
		1212	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1213	OUTPUT:
		1214	RETVAL
917		1215
918	void	1216	void
919	DESTROY(coro)
920	Coro::State coro
921	CODE:
922
923	if (coro->mainstack && coro->mainstack != main_mainstack)
924	{
925	struct coro temp;
926
927	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
928	LOAD(aTHX_ coro);
929
930	destroy_stacks (aTHX);
931
932	LOAD((&temp)); /* this will get rid of defsv etc.. */
933
934	coro->mainstack = 0;
935	}
936
937	deallocate_stack (coro);
938
939	Safefree (coro);
940
941	void
942	flush()
943	CODE:
944	#ifdef MAY_FLUSH
945	flush_padlist_cache ();
946	#endif
947
948	void
949	_exit(code)	1217	_exit (code)
950	int code	1218	int code
951	PROTOTYPE: $	1219	PROTOTYPE: $
952	CODE:	1220	CODE:
953	#if defined(__GLIBC__) || _POSIX_C_SOURCE
954	_exit (code);	1221	_exit (code);
955	#else
956	signal (SIGTERM, SIG_DFL);
957	raise (SIGTERM);
958	exit (code);
959	#endif
960		1222
961	MODULE = Coro::State PACKAGE = Coro::Cont	1223	int
		1224	cctx_count ()
		1225	CODE:
		1226	RETVAL = cctx_count;
		1227	OUTPUT:
		1228	RETVAL
962		1229
963	# this is slightly dirty (should expose a c-level api)	1230	int
964		1231	cctx_idle ()
965	void	1232	CODE:
966	yield(...)	1233	RETVAL = cctx_idle;
967	PROTOTYPE: @	1234	OUTPUT:
968	CODE:	1235	RETVAL
969	static SV *returnstk;
970	SV *sv;
971	AV *defav = GvAV (PL_defgv);
972	struct coro *prev, *next;
973
974	if (!returnstk)
975	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
976
977	/* set up @_ -- ugly */
978	av_clear (defav);
979	av_fill (defav, items - 1);
980	while (items--)
981	av_store (defav, items, SvREFCNT_inc (ST(items)));
982
983	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
984	sv = av_pop ((AV *)SvRV (returnstk));
985	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
986	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
987	SvREFCNT_dec (sv);
988
989	transfer(aTHX_ prev, next, 0);
990		1236
991	MODULE = Coro::State PACKAGE = Coro	1237	MODULE = Coro::State PACKAGE = Coro
992		1238
993	# this is slightly dirty (should expose a c-level api)
994
995	BOOT:	1239	BOOT:
996	{	1240	{
997	int i;	1241	int i;
		1242
998	HV *stash = gv_stashpv ("Coro", TRUE);	1243	coro_stash = gv_stashpv ("Coro", TRUE);
999		1244
1000	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1245	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1001	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1246	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1002	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1247	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1003	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1248	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1004	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1249	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1005	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1250	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1006		1251
1007	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1252	coro_current = get_sv ("Coro::current", FALSE);
1008	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1253	SvREADONLY_on (coro_current);
1009		1254
1010	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1255	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1011	coro_ready[i] = newAV ();	1256	coro_ready[i] = newAV ();
		1257
		1258	{
		1259	SV *sv = perl_get_sv("Coro::API", 1);
		1260
		1261	coroapi.schedule = api_schedule;
		1262	coroapi.save = api_save;
		1263	coroapi.cede = api_cede;
		1264	coroapi.cede_notself = api_cede_notself;
		1265	coroapi.ready = api_ready;
		1266	coroapi.is_ready = api_is_ready;
		1267	coroapi.nready = &coro_nready;
		1268	coroapi.current = coro_current;
		1269
		1270	GCoroAPI = &coroapi;
		1271	sv_setiv (sv, (IV)&coroapi);
		1272	SvREADONLY_on (sv);
		1273	}
1012	}	1274	}
1013		1275
1014	void	1276	void
1015	ready(self)	1277	_set_current (SV *current)
1016	SV * self	1278	PROTOTYPE: $
1017	CODE:	1279	CODE:
1018	api_ready (self);	1280	SvREFCNT_dec (SvRV (coro_current));
		1281	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1282
		1283	int
		1284	prio (Coro::State coro, int newprio = 0)
		1285	ALIAS:
		1286	nice = 1
		1287	CODE:
		1288	{
		1289	RETVAL = coro->prio;
		1290
		1291	if (items > 1)
		1292	{
		1293	if (ix)
		1294	newprio = coro->prio - newprio;
		1295
		1296	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1297	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1298
		1299	coro->prio = newprio;
		1300	}
		1301	}
		1302	OUTPUT:
		1303	RETVAL
		1304
		1305	SV *
		1306	ready (SV *self)
		1307	PROTOTYPE: $
		1308	CODE:
		1309	RETVAL = boolSV (api_ready (self));
		1310	OUTPUT:
		1311	RETVAL
		1312
		1313	SV *
		1314	is_ready (SV *self)
		1315	PROTOTYPE: $
		1316	CODE:
		1317	RETVAL = boolSV (api_is_ready (self));
		1318	OUTPUT:
		1319	RETVAL
		1320
		1321	int
		1322	nready (...)
		1323	PROTOTYPE:
		1324	CODE:
		1325	RETVAL = coro_nready;
		1326	OUTPUT:
		1327	RETVAL
		1328
		1329	MODULE = Coro::State PACKAGE = Coro::AIO
		1330
		1331	SV *
		1332	_get_state ()
		1333	CODE:
		1334	{
		1335	struct io_state *data;
		1336
		1337	RETVAL = newSV (sizeof (struct io_state));
		1338	data = (struct io_state *)SvPVX (RETVAL);
		1339	SvCUR_set (RETVAL, sizeof (struct io_state));
		1340	SvPOK_only (RETVAL);
		1341
		1342	data->errorno = errno;
		1343	data->laststype = PL_laststype;
		1344	data->laststatval = PL_laststatval;
		1345	data->statcache = PL_statcache;
		1346	}
		1347	OUTPUT:
		1348	RETVAL
1019		1349
1020	void	1350	void
1021	schedule(...)	1351	_set_state (char *data_)
1022	ALIAS:	1352	PROTOTYPE: $
1023	cede = 1
1024	CODE:	1353	CODE:
1025	api_schedule (ix);	1354	{
		1355	struct io_state *data = (void *)data_;
1026		1356
		1357	errno = data->errorno;
		1358	PL_laststype = data->laststype;
		1359	PL_laststatval = data->laststatval;
		1360	PL_statcache = data->statcache;
		1361	}
		1362

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