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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 1.128 by root, Fri Dec 22 04:22:28 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	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# 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
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		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)
8	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
10	# endif	52	# endif
11	# ifndef call_sv	53	# ifndef call_sv
12	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
25	# endif	67	# endif
26	#endif	68	#endif
27		69
28	#include "libcoro/coro.c"	70	/* 5.8.7 */
29		71	#ifndef SvRV_set
30	#include <signal.h>	72	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	73	#endif
42	#endif
43		74
44	#define MAY_FLUSH /* increases codesize and is rarely used */	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		76	# undef STACKGUARD
		77	#endif
45		78
46	#define SUB_INIT "Coro::State::initialize"	79	#ifndef STACKGUARD
47	#define UCORO_STATE "_coro_state"	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
48		87
49	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* 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	89	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
53		93
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		95
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	#else
		99	# define attribute(x)
		100	#endif
		101
		102	#define NOINLINE attribute ((noinline))
57		103
58	#include "CoroAPI.h"	104	#include "CoroAPI.h"
59		105
		106	#ifdef USE_ITHREADS
		107	static perl_mutex coro_mutex;
		108	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		109	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		110	#else
		111	# define LOCK (void)0
		112	# define UNLOCK (void)0
		113	#endif
		114
		115	struct io_state
		116	{
		117	int errorno;
		118	I32 laststype;
		119	int laststatval;
		120	Stat_t statcache;
		121	};
		122
60	static struct CoroAPI coroapi;	123	static struct CoroAPI coroapi;
		124	static AV *main_mainstack; /* used to differentiate between $main and others */
		125	static HV *coro_state_stash, *coro_stash;
		126	static SV *coro_mortal; /* will be freed after next transfer */
61		127
62	/* this is actually not only the c stack but also c registers etc... */	128	static struct coro_cctx *cctx_first;
		129	static int cctx_count, cctx_idle;
		130
		131	/* this is a structure representing a c-level coroutine */
63	typedef struct {	132	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	133	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		134
68	coro_context cctx;	135	/* the stack */
69
70	void *sptr;	136	void *sptr;
71	long ssize; /* positive == mmap, otherwise malloc */	137	long ssize; /* positive == mmap, otherwise malloc */
72	} coro_stack;
73		138
		139	/* cpu state */
		140	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		141	JMPENV *top_env;
		142	coro_context cctx;
		143
		144	int inuse;
		145
		146	#if USE_VALGRIND
		147	int valgrind_id;
		148	#endif
		149	} coro_cctx;
		150
		151	enum {
		152	CF_RUNNING = 0x0001, /* coroutine is running */
		153	CF_READY = 0x0002, /* coroutine is ready */
		154	CF_NEW = 0x0004, /* ahs never been switched to */
		155	};
		156
		157	/* this is a structure representing a perl-level coroutine */
74	struct coro {	158	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	159	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	160	coro_cctx *cctx;
77
78	/* the optional C context */
79	coro_stack *stack;
80	void *cursp;
81	int gencnt;
82
83	/* optionally saved, might be zero */
84	AV *defav;
85	SV *defsv;
86	SV *errsv;
87
88	/* saved global state not related to stacks */
89	U8 dowarn;
90	I32 in_eval;
91
92	/* the stacks and related info (callchain etc..) */
93	PERL_SI *curstackinfo;
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		161
121	/* data associated with this coroutine (initial args) */	162	/* data associated with this coroutine (initial args) */
122	AV *args;	163	AV *args;
		164	int refcnt;
		165	int save; /* CORO_SAVE flags */
		166	int flags; /* CF_ flags */
		167
		168	/* optionally saved, might be zero */
		169	AV *defav; /* @_ */
		170	SV *defsv; /* $_ */
		171	SV *errsv; /* $@ */
		172	SV *irssv; /* $/ */
		173	SV *irssv_sv; /* real $/ cache */
		174
		175	#define VAR(name,type) type name;
		176	# include "state.h"
		177	#undef VAR
		178
		179	/* coro process data */
		180	int prio;
123	};	181	};
124		182
125	typedef struct coro *Coro__State;	183	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	184	typedef struct coro *Coro__State_or_hashref;
127		185
128	static AV *main_mainstack; /* used to differentiate between $main and others */	186	static AV *
129	static HV *coro_state_stash;	187	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	{	188	{
139	AV *av;	189	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;	190	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		191
158	newpadlist = newAV ();	192	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	193	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	194	#if PERL_VERSION_ATLEAST (5,9,0)
		195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		196	#else
		197	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		198	#endif
		199	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		200	--AvFILLp (padlist);
		201
		202	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	203	av_store (newpadlist, 1, (SV *)newpad);
162		204
163	av = newAV (); /* will be @_ */	205	return newpadlist;
164	av_extend (av, 0);	206	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		207
168	for (ix = fpad; ix > 0; ix--)	208	static void
		209	free_padlist (AV *padlist)
		210	{
		211	/* may be during global destruction */
		212	if (SvREFCNT (padlist))
169	{	213	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	214	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	215	while (i >= 0)
172	{	216	{
173	char *name = SvPVX (namesv); /* XXX */	217	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	218	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	219	{
178	else
179	{ /* our own lexical */
180	SV *sv;	220	SV *sv;
181	if (*name == '&')	221	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	222	SvREFCNT_dec (sv);
183	else if (*name == '@')	223
184	sv = (SV *) newAV ();	224	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	}	225	}
193	}	226	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195	{
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	}
205		227
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV *kid = cv_clone((CV*)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225
226	return newpadlist;
227	}
228
229	#ifdef MAY_FLUSH
230	STATIC void
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
245	SvREFCNT_dec((SV*)padlist);	228	SvREFCNT_dec ((SV*)padlist);
246	}	229	}
247	}	230	}
248	#endif	231
		232	static int
		233	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		234	{
		235	AV *padlist;
		236	AV *av = (AV *)mg->mg_obj;
		237
		238	/* casting is fun. */
		239	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		240	free_padlist (padlist);
		241
		242	SvREFCNT_dec (av);
		243
		244	return 0;
		245	}
		246
		247	#define PERL_MAGIC_coro PERL_MAGIC_ext
		248
		249	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		250
		251	#define CORO_MAGIC(cv) \
		252	SvMAGIC (cv) \
		253	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		254	? SvMAGIC (cv) \
		255	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		256	: 0
249		257
250	/* the next two functions merely cache the padlists */	258	/* the next two functions merely cache the padlists */
251	STATIC void	259	static void
252	get_padlist (CV *cv)	260	get_padlist (CV *cv)
253	{	261	{
254	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	262	MAGIC *mg = CORO_MAGIC (cv);
		263	AV *av;
255		264
256	if (he && AvFILLp ((AV *)*he) >= 0)	265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
257	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
258	else	267	else
		268	{
		269	#if PREFER_PERL_FUNCTIONS
		270	/* this is probably cleaner, but also slower? */
		271	CV *cp = Perl_cv_clone (cv);
		272	CvPADLIST (cv) = CvPADLIST (cp);
		273	CvPADLIST (cp) = 0;
		274	SvREFCNT_dec (cp);
		275	#else
259	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	276	CvPADLIST (cv) = coro_clone_padlist (cv);
		277	#endif
		278	}
260	}	279	}
261		280
262	STATIC void	281	static void
263	put_padlist (CV *cv)	282	put_padlist (CV *cv)
264	{	283	{
265	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);	284	MAGIC *mg = CORO_MAGIC (cv);
		285	AV *av;
266		286
267	if (SvTYPE (*he) != SVt_PVAV)	287	if (!mg)
268	{
269	SvREFCNT_dec (*he);
270	*he = (SV *)newAV ();
271	}	288	{
272		289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274	}	291	mg->mg_virtual = &vtbl_coro;
275		292	mg->mg_obj = (SV *)newAV ();
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	{	293	}
285	HE *he;
286	AV *padlist;
287		294
288	while (!!(he = hv_iternext (hv)))	295	av = (AV *)mg->mg_obj;
289	{
290	AV *av = (AV *)HeVAL(he);
291		296
292	/* casting is fun. */	297	if (AvFILLp (av) >= AvMAX (av))
293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	298	av_extend (av, AvMAX (av) + 1);
294	free_padlist (padlist);
295	}
296	}
297		299
298	SvREFCNT_dec (hv);	300	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
299	}	301	}
300	#endif
301		302
302	#define SB do {	303	#define SB do {
303	#define SE } while (0)	304	#define SE } while (0)
304		305
305	#define LOAD(state) load_state(aTHX_ (state));
306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
307
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	306	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
309		307
310	static void	308	static void
311	load_state(pTHX_ Coro__State c)	309	load_perl (Coro__State c)
312	{	310	{
313	PL_dowarn = c->dowarn;	311	#define VAR(name,type) PL_ ## name = c->name;
314	PL_in_eval = c->in_eval;	312	# include "state.h"
315		313	#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		314
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		318	if (c->irssv)
		319	{
		320	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		321	SvREFCNT_dec (c->irssv);
		322	else
		323	{
		324	REPLACE_SV (PL_rs, c->irssv);
		325	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		326	sv_setsv (c->irssv_sv, PL_rs);
		327	}
		328	}
347		329
348	{	330	{
349	dSP;	331	dSP;
350	CV *cv;	332	CV *cv;
351		333
352	/* now do the ugly restore mess */	334	/* now do the ugly restore mess */
353	while ((cv = (CV *)POPs))	335	while ((cv = (CV *)POPs))
354	{	336	{
355	AV *padlist = (AV *)POPs;
356
357	if (padlist)
358	{
359	put_padlist (cv); /* mark this padlist as available */	337	put_padlist (cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;	338	CvDEPTH (cv) = PTR2IV (POPs);
361	#ifdef USE_THREADS	339	CvPADLIST (cv) = (AV *)POPs;
362	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
363	#endif
364	}
365
366	++CvDEPTH(cv);
367	}	340	}
368		341
369	PUTBACK;	342	PUTBACK;
370	}	343	}
371	}	344	}
372		345
373	static void	346	static void
374	save_state(pTHX_ Coro__State c, int flags)	347	save_perl (Coro__State c)
375	{	348	{
376	{	349	{
377	dSP;	350	dSP;
378	I32 cxix = cxstack_ix;	351	I32 cxix = cxstack_ix;
379	PERL_CONTEXT *ccstk = cxstack;	352	PERL_CONTEXT *ccstk = cxstack;
…		…
382	/*	355	/*
383	* the worst thing you can imagine happens first - we have to save	356	* the worst thing you can imagine happens first - we have to save
384	* (and reinitialize) all cv's in the whole callchain :(	357	* (and reinitialize) all cv's in the whole callchain :(
385	*/	358	*/
386		359
		360	EXTEND (SP, 3 + 1);
387	PUSHs (Nullsv);	361	PUSHs (Nullsv);
388	/* this loop was inspired by pp_caller */	362	/* this loop was inspired by pp_caller */
389	for (;;)	363	for (;;)
390	{	364	{
391	while (cxix >= 0)	365	while (cxix >= 0)
392	{	366	{
393	PERL_CONTEXT *cx = &ccstk[cxix--];	367	PERL_CONTEXT *cx = &ccstk[cxix--];
394		368
395	if (CxTYPE(cx) == CXt_SUB)	369	if (CxTYPE (cx) == CXt_SUB)
396	{	370	{
397	CV *cv = cx->blk_sub.cv;	371	CV *cv = cx->blk_sub.cv;
		372
398	if (CvDEPTH(cv))	373	if (CvDEPTH (cv))
399	{	374	{
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);	375	EXTEND (SP, 3);
406
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));	376	PUSHs ((SV *)CvPADLIST (cv));
		377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
415	PUSHs ((SV *)cv);	378	PUSHs ((SV *)cv);
416		379
		380	CvDEPTH (cv) = 0;
417	get_padlist (cv); /* this is a monster */	381	get_padlist (cv);
418	}	382	}
419	}	383	}
420	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)
422	{
423	/* I never used formats, so how should I know how these are implemented? */
424	/* my bold guess is as a simple, plain sub... */
425	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
426	}
427	#endif
428	}	384	}
429		385
430	if (top_si->si_type == PERLSI_MAIN)	386	if (top_si->si_type == PERLSI_MAIN)
431	break;	387	break;
432		388
…		…
436	}	392	}
437		393
438	PUTBACK;	394	PUTBACK;
439	}	395	}
440		396
441	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	397	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	399	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		400	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
444		401
445	c->dowarn = PL_dowarn;	402	#define VAR(name,type)c->name = PL_ ## name;
446	c->in_eval = PL_in_eval;	403	# include "state.h"
447		404	#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	}	405	}
476		406
477	/*	407	/*
478	* allocate various perl stacks. This is an exact copy	408	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory	409	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need	410	* on the (sometimes correct) assumption that coroutines do
481	* a lot of stackspace.	411	* not usually need a lot of stackspace.
482	*/	412	*/
483	STATIC void	413	#if PREFER_PERL_FUNCTIONS
		414	# define coro_init_stacks init_stacks
		415	#else
		416	static void
484	coro_init_stacks (pTHX)	417	coro_init_stacks ()
485	{	418	{
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
487	PL_curstackinfo->si_type = PERLSI_MAIN;	420	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	421	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		423
491	PL_stack_base = AvARRAY(PL_curstack);	424	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	425	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		427
495	New(50,PL_tmps_stack,96,SV*);	428	New(50,PL_tmps_stack,128,SV*);
496	PL_tmps_floor = -1;	429	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	430	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	431	PL_tmps_max = 128;
499		432
500	New(54,PL_markstack,16,I32);	433	New(54,PL_markstack,32,I32);
501	PL_markstack_ptr = PL_markstack;	434	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	435	PL_markstack_max = PL_markstack + 32;
503		436
504	#ifdef SET_MARK_OFFSET	437	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;	438	SET_MARK_OFFSET;
506	#endif	439	#endif
507		440
508	New(54,PL_scopestack,16,I32);	441	New(54,PL_scopestack,32,I32);
509	PL_scopestack_ix = 0;	442	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	443	PL_scopestack_max = 32;
511		444
512	New(54,PL_savestack,96,ANY);	445	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	446	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	447	PL_savestack_max = 64;
515		448
		449	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	450	New(54,PL_retstack,16,OP*);
517	PL_retstack_ix = 0;	451	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	452	PL_retstack_max = 16;
		453	#endif
519	}	454	}
		455	#endif
520		456
521	/*	457	/*
522	* destroy the stacks, the callchain etc...	458	* destroy the stacks, the callchain etc...
523	* still there is a memleak of 128 bytes...
524	*/	459	*/
525	STATIC void	460	static void
526	destroy_stacks(pTHX)	461	coro_destroy_stacks ()
527	{	462	{
528	if (!IN_DESTRUCT)	463	if (!IN_DESTRUCT)
529	{	464	{
530	/* is this ugly, I ask? */	465	/* restore all saved variables and stuff */
531	while (PL_scopestack_ix)	466	LEAVE_SCOPE (0);
532	LEAVE;	467	assert (PL_tmps_floor == -1);
533		468
534	/* sure it is, but more important: is it correct?? :/ */	469	/* free all temporaries */
535	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
536	FREETMPS;	470	FREETMPS;
		471	assert (PL_tmps_ix == -1);
		472
		473	POPSTACK_TO (PL_mainstack);
537	}	474	}
538		475
539	while (PL_curstackinfo->si_next)	476	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;	477	PL_curstackinfo = PL_curstackinfo->si_next;
541		478
542	while (PL_curstackinfo)	479	while (PL_curstackinfo)
543	{	480	{
544	PERL_SI *p = PL_curstackinfo->si_prev;	481	PERL_SI *p = PL_curstackinfo->si_prev;
545		482
546	{
547	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */
550	}
551
552	if (!IN_DESTRUCT)	483	if (!IN_DESTRUCT)
553	{
554	dounwind(-1);
555	SvREFCNT_dec(PL_curstackinfo->si_stack);	484	SvREFCNT_dec (PL_curstackinfo->si_stack);
556	}
557		485
558	Safefree(PL_curstackinfo->si_cxstack);	486	Safefree (PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);	487	Safefree (PL_curstackinfo);
560	PL_curstackinfo = p;	488	PL_curstackinfo = p;
561	}	489	}
562		490
563	Safefree(PL_tmps_stack);	491	Safefree (PL_tmps_stack);
564	Safefree(PL_markstack);	492	Safefree (PL_markstack);
565	Safefree(PL_scopestack);	493	Safefree (PL_scopestack);
566	Safefree(PL_savestack);	494	Safefree (PL_savestack);
		495	#if !PERL_VERSION_ATLEAST (5,9,0)
567	Safefree(PL_retstack);	496	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	497	#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	}	498	}
598		499
599	static void	500	static void
600	deallocate_stack (Coro__State ctx)	501	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	{	502	{
627	/*	503	/*
628	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
629	*/	505	*/
		506
		507	coro_init_stacks ();
		508
		509	PL_curcop = &PL_compiling;
		510	PL_in_eval = EVAL_NULL;
		511	PL_curpm = 0;
		512	PL_localizing = 0;
		513	PL_dirty = 0;
		514	PL_restartop = 0;
		515
		516	{
		517	dSP;
		518	LOGOP myop;
		519
		520	SvREFCNT_dec (GvAV (PL_defgv));
		521	GvAV (PL_defgv) = coro->args; coro->args = 0;
		522
		523	Zero (&myop, 1, LOGOP);
		524	myop.op_next = Nullop;
		525	myop.op_flags = OPf_WANT_VOID;
		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		529	PUTBACK;
		530	PL_op = (OP *)&myop;
		531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		532	SPAGAIN;
		533	}
		534
		535	ENTER; /* necessary e.g. for dounwind */
		536	}
		537
		538	static void
		539	free_coro_mortal ()
		540	{
		541	if (coro_mortal)
		542	{
		543	SvREFCNT_dec (coro_mortal);
		544	coro_mortal = 0;
		545	}
		546	}
		547
		548	/* inject a fake call to Coro::State::_cctx_init into the execution */
		549	static void NOINLINE
		550	prepare_cctx (coro_cctx *cctx)
		551	{
630	dSP;	552	dSP;
631	Coro__State ctx = (Coro__State)arg;	553	LOGOP myop;
632	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
633		554
634	coro_init_stacks (aTHX);	555	Zero (&myop, 1, LOGOP);
635	/*PL_curcop = 0;*/	556	myop.op_next = PL_op;
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */	557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
637	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args;
639		558
		559	PUSHMARK (SP);
		560	EXTEND (SP, 2);
		561	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		562	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		563	PUTBACK;
		564	PL_op = (OP *)&myop;
		565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640	SPAGAIN;	566	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);
662	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;
664
665	PUSHMARK(SP);
666	XPUSHs (sub_init);
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;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;
677
678	ENTER; /* necessary e.g. for dounwind */
679	}
680	}	567	}
681		568
682	static void	569	static void
683	continue_coro (void *arg)	570	coro_run (void *arg)
684	{	571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
		573	UNLOCK;
		574
685	/*	575	/*
686	* this is a _very_ stripped down perl interpreter ;)	576	* this is a _very_ stripped down perl interpreter ;)
687	*/	577	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;	578	PL_top_env = &PL_start_env;
692		579
693	ctx->cursp = 0;	580	/* inject call to cctx_init */
694	PL_op = PL_op->op_next;	581	prepare_cctx ((coro_cctx *)arg);
695	CALLRUNOPS(aTHX);
696		582
		583	/* somebody will hit me for both perl_run and PL_restartop */
		584	PL_restartop = PL_op;
		585	perl_run (PL_curinterp);
		586
		587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
697	abort ();	588	abort ();
698	}	589	}
699		590
700	STATIC void	591	static coro_cctx *
		592	cctx_new ()
		593	{
		594	coro_cctx *cctx;
		595
		596	++cctx_count;
		597
		598	Newz (0, cctx, 1, coro_cctx);
		599
		600	#if HAVE_MMAP
		601
		602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		603	/* mmap supposedly does allocate-on-write for us */
		604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		605
		606	if (cctx->sptr == (void *)-1)
		607	{
		608	perror ("FATAL: unable to mmap stack for coroutine");
		609	_exit (EXIT_FAILURE);
		610	}
		611
		612	# if STACKGUARD
		613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		614	# endif
		615
		616	#else
		617
		618	cctx->ssize = STACKSIZE * (long)sizeof (long);
		619	New (0, cctx->sptr, STACKSIZE, long);
		620
		621	if (!cctx->sptr)
		622	{
		623	perror ("FATAL: unable to malloc stack for coroutine");
		624	_exit (EXIT_FAILURE);
		625	}
		626
		627	#endif
		628
		629	#if USE_VALGRIND
		630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		632	cctx->ssize + (char *)cctx->sptr
		633	);
		634	#endif
		635
		636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		637
		638	return cctx;
		639	}
		640
		641	static void
		642	cctx_destroy (coro_cctx *cctx)
		643	{
		644	if (!cctx)
		645	return;
		646
		647	--cctx_count;
		648
		649	#if USE_VALGRIND
		650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		651	#endif
		652
		653	#if HAVE_MMAP
		654	munmap (cctx->sptr, cctx->ssize);
		655	#else
		656	Safefree (cctx->sptr);
		657	#endif
		658
		659	Safefree (cctx);
		660	}
		661
		662	static coro_cctx *
		663	cctx_get ()
		664	{
		665	coro_cctx *cctx;
		666
		667	if (cctx_first)
		668	{
		669	cctx = cctx_first;
		670	cctx_first = cctx->next;
		671	--cctx_idle;
		672	}
		673	else
		674	{
		675	cctx = cctx_new ();
		676	PL_op = PL_op->op_next;
		677	}
		678
		679	return cctx;
		680	}
		681
		682	static void
		683	cctx_put (coro_cctx *cctx)
		684	{
		685	/* free another cctx if overlimit */
		686	if (cctx_idle >= MAX_IDLE_CCTX)
		687	{
		688	coro_cctx *first = cctx_first;
		689	cctx_first = first->next;
		690	--cctx_idle;
		691
		692	assert (!first->inuse);
		693	cctx_destroy (first);
		694	}
		695
		696	++cctx_idle;
		697	cctx->next = cctx_first;
		698	cctx_first = cctx;
		699	}
		700
		701	/* never call directly, always through the coro_state_transfer global variable */
		702	static void NOINLINE
701	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	703	transfer (struct coro *prev, struct coro *next)
702	{	704	{
703	dSTACKLEVEL;	705	dSTACKLEVEL;
704	static struct coro *xnext;
705		706
		707	/* sometimes transfer is only called to set idle_sp */
		708	if (!next)
		709	{
		710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		711	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		712	}
706	if (prev != next)	713	else if (prev != next)
707	{	714	{
708	xnext = next;	715	coro_cctx *prev__cctx;
709		716
710	if (next->mainstack)	717	if (prev->flags & CF_NEW)
711	{	718	{
712	SAVE (prev, flags);	719	/* create a new empty context */
713	LOAD (next);	720	Newz (0, prev->cctx, 1, coro_cctx);
714		721	prev->cctx->inuse = 1;
715	/* mark this state as in-use */	722	prev->flags &= ~CF_NEW;
716	next->mainstack = 0;	723	prev->flags |= CF_RUNNING;
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	}	724	}
746	else if (next->tmps_ix == -2)	725
747	croak ("tried to transfer to running coroutine");	726	/*TODO: must not croak here */
		727	if (!prev->flags & CF_RUNNING)
		728	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		729
		730	if (next->flags & CF_RUNNING)
		731	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		732
		733	prev->flags &= ~CF_RUNNING;
		734	next->flags |= CF_RUNNING;
		735
		736	LOCK;
		737
		738	if (next->flags & CF_NEW)
		739	{
		740	/* need to start coroutine */
		741	next->flags &= ~CF_NEW;
		742	/* first get rid of the old state */
		743	save_perl (prev);
		744	/* setup coroutine call */
		745	setup_coro (next);
		746	/* need a new stack */
		747	assert (!next->cctx);
		748	}
748	else	749	else
749	{	750	{
750	SAVE (prev, -1); /* first get rid of the old state */	751	/* coroutine already started */
751		752	save_perl (prev);
752	if (flags & TRANSFER_SAVE_CCTXT)	753	load_perl (next);
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	}	754	}
781		755
782	/*	756	prev__cctx = prev->cctx;
783	* xnext is now either prev or next, depending on wether	757
784	* we switched the c stack or not. that's why I use a global	758	/* possibly "free" the cctx */
785	* variable, that should become thread-specific at one point.	759	if (prev__cctx->idle_sp == STACKLEVEL)
786	*/	760	{
787	xnext->cursp = stacklevel;	761	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
788	}	762	assert (PL_top_env == prev__cctx->top_env);
789		763
790	if (coro_mortal)	764	prev->cctx = 0;
		765
		766	cctx_put (prev__cctx);
		767	prev__cctx->inuse = 0;
		768	}
		769
		770	if (!next->cctx)
		771	{
		772	next->cctx = cctx_get ();
		773	assert (!next->cctx->inuse);
		774	next->cctx->inuse = 1;
		775	}
		776
		777	if (prev__cctx != next->cctx)
		778	{
		779	prev__cctx->top_env = PL_top_env;
		780	PL_top_env = next->cctx->top_env;
		781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		782	}
		783
		784	free_coro_mortal ();
		785
		786	UNLOCK;
791	{	787	}
792	SvREFCNT_dec (coro_mortal);	788	}
793	coro_mortal = 0;	789
		790	struct transfer_args
		791	{
		792	struct coro *prev, *next;
		793	};
		794
		795	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		796
		797	static void
		798	coro_state_destroy (struct coro *coro)
		799	{
		800	if (coro->refcnt--)
		801	return;
		802
		803	if (coro->mainstack && coro->mainstack != main_mainstack)
794	}	804	{
795	}	805	struct coro temp;
		806	Zero (&temp, 1, struct coro);
		807	temp.save = CORO_SAVE_ALL;
796		808
797	#define SV_CORO(sv,func) \	809	if (coro->flags & CF_RUNNING)
798	do { \	810	croak ("FATAL: tried to destroy currently running coroutine");
799	if (SvROK (sv)) \
800	sv = SvRV (sv); \
801	\
802	if (SvTYPE(sv) == SVt_PVHV) \
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		811
818	#define SvSTATE(sv) (struct coro *)SvIV (sv)	812	save_perl (&temp);
		813	load_perl (coro);
819		814
		815	coro_destroy_stacks ();
		816
		817	load_perl (&temp); /* this will get rid of defsv etc.. */
		818
		819	coro->mainstack = 0;
		820	}
		821
		822	cctx_destroy (coro->cctx);
		823	SvREFCNT_dec (coro->args);
		824	Safefree (coro);
		825	}
		826
820	static void	827	static int
		828	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		829	{
		830	struct coro *coro = (struct coro *)mg->mg_ptr;
		831	mg->mg_ptr = 0;
		832
		833	coro_state_destroy (coro);
		834
		835	return 0;
		836	}
		837
		838	static int
		839	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		840	{
		841	struct coro *coro = (struct coro *)mg->mg_ptr;
		842
		843	++coro->refcnt;
		844
		845	return 0;
		846	}
		847
		848	static MGVTBL coro_state_vtbl = {
		849	0, 0, 0, 0,
		850	coro_state_clear,
		851	0,
		852	#ifdef MGf_DUP
		853	coro_state_dup,
		854	#else
		855	# define MGf_DUP 0
		856	#endif
		857	};
		858
		859	static struct coro *
		860	SvSTATE (SV *coro)
		861	{
		862	HV *stash;
		863	MAGIC *mg;
		864
		865	if (SvROK (coro))
		866	coro = SvRV (coro);
		867
		868	stash = SvSTASH (coro);
		869	if (stash != coro_stash && stash != coro_state_stash)
		870	{
		871	/* very slow, but rare, check */
		872	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		873	croak ("Coro::State object required");
		874	}
		875
		876	mg = SvMAGIC (coro);
		877	assert (mg->mg_type == PERL_MAGIC_ext);
		878	return (struct coro *)mg->mg_ptr;
		879	}
		880
		881	static void
		882	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		883	{
		884	ta->prev = SvSTATE (prev_sv);
		885	ta->next = SvSTATE (next_sv);
		886	}
		887
		888	static void
821	api_transfer(pTHX_ SV *prev, SV *next, int flags)	889	api_transfer (SV *prev_sv, SV *next_sv)
822	{	890	{
823	SV_CORO (prev, "Coro::transfer");	891	struct transfer_args ta;
824	SV_CORO (next, "Coro::transfer");
825		892
826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	893	prepare_transfer (&ta, prev_sv, next_sv);
		894	TRANSFER (ta);
		895	}
		896
		897	static int
		898	api_save (SV *coro_sv, int new_save)
		899	{
		900	struct coro *coro = SvSTATE (coro_sv);
		901	int old_save = coro->save;
		902
		903	if (new_save >= 0)
		904	coro->save = new_save;
		905
		906	return old_save;
827	}	907	}
828		908
829	/** Coro ********************************************************************/	909	/** Coro ********************************************************************/
830		910
831	#define PRIO_MAX 3	911	#define PRIO_MAX 3
…		…
834	#define PRIO_LOW -1	914	#define PRIO_LOW -1
835	#define PRIO_IDLE -3	915	#define PRIO_IDLE -3
836	#define PRIO_MIN -4	916	#define PRIO_MIN -4
837		917
838	/* for Coro.pm */	918	/* for Coro.pm */
839	static GV *coro_current, *coro_idle;	919	static SV *coro_current;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	920	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;	921	static int coro_nready;
842		922
843	static void	923	static void
844	coro_enq (SV *sv)	924	coro_enq (SV *coro_sv)
845	{	925	{
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);	926	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
856	coro_nready++;	927	coro_nready++;
857
858	return;
859	}
860
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");
862	}	928	}
863		929
864	static SV *	930	static SV *
865	coro_deq (int min_prio)	931	coro_deq (int min_prio)
866	{	932	{
…		…
869	min_prio -= PRIO_MIN;	935	min_prio -= PRIO_MIN;
870	if (min_prio < 0)	936	if (min_prio < 0)
871	min_prio = 0;	937	min_prio = 0;
872		938
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	939	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)	940	if (AvFILLp (coro_ready [prio]) >= 0)
875	{	941	{
876	coro_nready--;	942	coro_nready--;
877	return av_shift (coro_ready[prio]);	943	return av_shift (coro_ready [prio]);
878	}	944	}
879		945
880	return 0;	946	return 0;
881	}	947	}
882		948
883	static void	949	static int
884	api_ready (SV *coro)	950	api_ready (SV *coro_sv)
885	{	951	{
		952	struct coro *coro;
		953
886	if (SvROK (coro))	954	if (SvROK (coro_sv))
887	coro = SvRV (coro);	955	coro_sv = SvRV (coro_sv);
888		956
		957	coro = SvSTATE (coro_sv);
		958
		959	if (coro->flags & CF_READY)
		960	return 0;
		961
		962	coro->flags |= CF_READY;
		963
		964	LOCK;
889	coro_enq (SvREFCNT_inc (coro));	965	coro_enq (SvREFCNT_inc (coro_sv));
		966	UNLOCK;
		967
		968	return 1;
		969	}
		970
		971	static int
		972	api_is_ready (SV *coro_sv)
		973	{
		974	return !!SvSTATE (coro_sv)->flags & CF_READY;
		975	}
		976
		977	static void
		978	prepare_schedule (struct transfer_args *ta)
		979	{
		980	SV *prev, *next;
		981
		982	for (;;)
		983	{
		984	LOCK;
		985	next = coro_deq (PRIO_MIN);
		986	UNLOCK;
		987
		988	if (next)
		989	break;
		990
		991	{
		992	dSP;
		993
		994	ENTER;
		995	SAVETMPS;
		996
		997	PUSHMARK (SP);
		998	PUTBACK;
		999	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1000
		1001	FREETMPS;
		1002	LEAVE;
		1003	}
		1004	}
		1005
		1006	prev = SvRV (coro_current);
		1007	SvRV_set (coro_current, next);
		1008
		1009	/* free this only after the transfer */
		1010	LOCK;
		1011	free_coro_mortal ();
		1012	UNLOCK;
		1013	coro_mortal = prev;
		1014
		1015	assert (!SvROK(prev));//D
		1016	assert (!SvROK(next));//D
		1017
		1018	ta->prev = SvSTATE (prev);
		1019	ta->next = SvSTATE (next);
		1020
		1021	assert (ta->next->flags & CF_READY);
		1022	ta->next->flags &= ~CF_READY;
		1023	}
		1024
		1025	static void
		1026	prepare_cede (struct transfer_args *ta)
		1027	{
		1028	api_ready (coro_current);
		1029
		1030	prepare_schedule (ta);
890	}	1031	}
891		1032
892	static void	1033	static void
893	api_schedule (void)	1034	api_schedule (void)
894	{	1035	{
895	SV *prev, *next;	1036	struct transfer_args ta;
896		1037
897	prev = SvRV (GvSV (coro_current));	1038	prepare_schedule (&ta);
898	next = coro_deq (PRIO_MIN);	1039	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	}	1040	}
914		1041
915	static void	1042	static void
916	api_cede (void)	1043	api_cede (void)
917	{	1044	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1045	struct transfer_args ta;
919		1046
920	api_schedule ();	1047	prepare_cede (&ta);
		1048	TRANSFER (ta);
921	}	1049	}
922		1050
923	MODULE = Coro::State PACKAGE = Coro::State	1051	MODULE = Coro::State PACKAGE = Coro::State
924		1052
925	PROTOTYPES: ENABLE	1053	PROTOTYPES: DISABLE
926		1054
927	BOOT:	1055	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	1056	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1057	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1058	MUTEX_INIT (&coro_mutex);
		1059	#endif
		1060	BOOT_PAGESIZE;
		1061
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1062	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1063
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1064	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1065	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1066	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1067	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1068	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
937
938	if (!padlist_cache)
939	padlist_cache = newHV ();
940		1069
941	main_mainstack = PL_mainstack;	1070	main_mainstack = PL_mainstack;
942		1071
943	coroapi.ver = CORO_API_VERSION;	1072	coroapi.ver = CORO_API_VERSION;
944	coroapi.transfer = api_transfer;	1073	coroapi.transfer = api_transfer;
945	}
946		1074
947	Coro::State	1075	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
948	_newprocess(args)	1076	}
949	SV * args	1077
950	PROTOTYPE: $	1078	SV *
		1079	new (char *klass, ...)
951	CODE:	1080	CODE:
952	Coro__State coro;	1081	{
		1082	struct coro *coro;
		1083	HV *hv;
		1084	int i;
953		1085
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);	1086	Newz (0, coro, 1, struct coro);
		1087	coro->args = newAV ();
		1088	coro->save = CORO_SAVE_ALL;
		1089	coro->flags = CF_NEW;
958		1090
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1091	hv = newHV ();
960	coro->mainstack = 0; /* actual work is done inside transfer */	1092	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
961	coro->stack = 0;	1093	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
962		1094
963	/* same as JMPENV_BOOTSTRAP */	1095	for (i = 1; i < items; i++)
964	/* we might be able to recycle start_env, but safe is safe */	1096	av_push (coro->args, newSVsv (ST (i)));
965	Zero(&coro->start_env, 1, JMPENV);	1097	}
966	coro->start_env.je_ret = -1;
967	coro->start_env.je_mustcatch = TRUE;
968
969	RETVAL = coro;
970	OUTPUT:	1098	OUTPUT:
971	RETVAL	1099	RETVAL
972		1100
		1101	int
		1102	save (SV *coro, int new_save = -1)
		1103	CODE:
		1104	RETVAL = api_save (coro, new_save);
		1105	OUTPUT:
		1106	RETVAL
		1107
973	void	1108	void
974	transfer(prev, next, flags)	1109	_set_stacklevel (...)
975	SV *prev	1110	ALIAS:
976	SV *next	1111	Coro::State::transfer = 1
977	int flags	1112	Coro::schedule = 2
978	PROTOTYPE: @	1113	Coro::cede = 3
979	CODE:	1114	CODE:
980	PUTBACK;	1115	{
981	SV_CORO (next, "Coro::transfer");	1116	struct transfer_args ta;
982	SV_CORO (prev, "Coro::transfer");	1117
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1118	switch (ix)
984	SPAGAIN;	1119	{
		1120	case 0:
		1121	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1122	ta.next = 0;
		1123	break;
		1124
		1125	case 1:
		1126	if (items != 2)
		1127	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1128
		1129	prepare_transfer (&ta, ST (0), ST (1));
		1130	break;
		1131
		1132	case 2:
		1133	prepare_schedule (&ta);
		1134	break;
		1135
		1136	case 3:
		1137	prepare_cede (&ta);
		1138	break;
		1139	}
		1140
		1141	TRANSFER (ta);
		1142	}
985		1143
986	void	1144	void
987	DESTROY(coro)	1145	_clone_state_from (SV *dst, SV *src)
988	Coro::State coro	1146	CODE:
989	CODE:	1147	{
		1148	struct coro *coro_src = SvSTATE (src);
990		1149
991	if (coro->mainstack && coro->mainstack != main_mainstack)	1150	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
992	{
993	struct coro temp;
994		1151
995	PUTBACK;	1152	++coro_src->refcnt;
996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1153	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
997	LOAD(aTHX_ coro);	1154	}
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		1155
1012	void	1156	void
1013	flush()
1014	CODE:
1015	#ifdef MAY_FLUSH
1016	flush_padlist_cache ();
1017	#endif
1018
1019	void
1020	_exit(code)	1157	_exit (code)
1021	int code	1158	int code
1022	PROTOTYPE: $	1159	PROTOTYPE: $
1023	CODE:	1160	CODE:
1024	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1025	_exit (code);	1161	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1162
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1163	int
		1164	cctx_count ()
		1165	CODE:
		1166	RETVAL = cctx_count;
		1167	OUTPUT:
		1168	RETVAL
1033		1169
1034	# this is slightly dirty (should expose a c-level api)	1170	int
1035		1171	cctx_idle ()
1036	void	1172	CODE:
1037	yield(...)	1173	RETVAL = cctx_idle;
1038	PROTOTYPE: @	1174	OUTPUT:
1039	CODE:	1175	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		1176
1062	MODULE = Coro::State PACKAGE = Coro	1177	MODULE = Coro::State PACKAGE = Coro
1063		1178
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1179	BOOT:
1067	{	1180	{
1068	int i;	1181	int i;
		1182
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1183	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1184
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1185	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1186	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1187	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1188	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1189	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1190	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1191
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1192	coro_current = get_sv ("Coro::current", FALSE);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1193	SvREADONLY_on (coro_current);
1080		1194
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1195	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1196	coro_ready[i] = newAV ();
1083		1197
1084	{	1198	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1199	SV *sv = perl_get_sv("Coro::API", 1);
1086		1200
1087	coroapi.schedule = api_schedule;	1201	coroapi.schedule = api_schedule;
		1202	coroapi.save = api_save;
1088	coroapi.cede = api_cede;	1203	coroapi.cede = api_cede;
1089	coroapi.ready = api_ready;	1204	coroapi.ready = api_ready;
		1205	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1206	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1207	coroapi.current = coro_current;
1092		1208
1093	GCoroAPI = &coroapi;	1209	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1210	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1211	SvREADONLY_on (sv);
1096	}	1212	}
1097	}	1213	}
1098		1214
1099	void	1215	void
1100	ready(self)	1216	_set_current (SV *current)
1101	SV * self
1102	PROTOTYPE: $	1217	PROTOTYPE: $
1103	CODE:	1218	CODE:
1104	api_ready (self);	1219	SvREFCNT_dec (SvRV (coro_current));
		1220	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1105		1221
1106	int	1222	int
		1223	prio (Coro::State coro, int newprio = 0)
		1224	ALIAS:
		1225	nice = 1
		1226	CODE:
		1227	{
		1228	RETVAL = coro->prio;
		1229
		1230	if (items > 1)
		1231	{
		1232	if (ix)
		1233	newprio += coro->prio;
		1234
		1235	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1236	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1237
		1238	coro->prio = newprio;
		1239	}
		1240	}
		1241
		1242	SV *
		1243	ready (SV *self)
		1244	PROTOTYPE: $
		1245	CODE:
		1246	RETVAL = boolSV (api_ready (self));
		1247	OUTPUT:
		1248	RETVAL
		1249
		1250	SV *
		1251	is_ready (SV *self)
		1252	PROTOTYPE: $
		1253	CODE:
		1254	RETVAL = boolSV (api_is_ready (self));
		1255	OUTPUT:
		1256	RETVAL
		1257
		1258	int
1107	nready(...)	1259	nready (...)
1108	PROTOTYPE:	1260	PROTOTYPE:
1109	CODE:	1261	CODE:
1110	RETVAL = coro_nready;	1262	RETVAL = coro_nready;
1111	OUTPUT:	1263	OUTPUT:
1112	RETVAL	1264	RETVAL
1113		1265
		1266	MODULE = Coro::State PACKAGE = Coro::AIO
		1267
		1268	SV *
		1269	_get_state ()
		1270	CODE:
		1271	{
		1272	struct io_state *data;
		1273
		1274	RETVAL = newSV (sizeof (struct io_state));
		1275	data = (struct io_state *)SvPVX (RETVAL);
		1276	SvCUR_set (RETVAL, sizeof (struct io_state));
		1277	SvPOK_only (RETVAL);
		1278
		1279	data->errorno = errno;
		1280	data->laststype = PL_laststype;
		1281	data->laststatval = PL_laststatval;
		1282	data->statcache = PL_statcache;
		1283	}
		1284	OUTPUT:
		1285	RETVAL
		1286
1114	void	1287	void
1115	schedule(...)	1288	_set_state (char *data_)
1116	PROTOTYPE:	1289	PROTOTYPE: $
1117	CODE:	1290	CODE:
1118	api_schedule ();	1291	{
		1292	struct io_state *data = (void *)data_;
1119		1293
1120	void	1294	errno = data->errorno;
1121	cede(...)	1295	PL_laststype = data->laststype;
1122	PROTOTYPE:	1296	PL_laststatval = data->laststatval;
1123	CODE:	1297	PL_statcache = data->statcache;
1124	api_cede ();	1298	}
1125		1299

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