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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.53 by pcg, Sat Feb 14 12:39:41 2004 UTC vs.
Revision 1.132 by root, Fri Dec 29 13:03:05 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 SUB_INIT "Coro::State::initialize"	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
45	#define UCORO_STATE "_coro_state"	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
46		87
47	/* 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
48	* 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
49	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
51		93
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		95
54	#define labs(l) ((l) >= 0 ? (l) : -(l))	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))
55		105
56	#include "CoroAPI.h"	106	#include "CoroAPI.h"
57		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
58	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 */
59		129
60	/* 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 */
61	typedef struct {	134	typedef struct coro_cctx {
62	int refcnt; /* pointer reference counter */	135	struct coro_cctx *next;
63	int usecnt; /* shared by how many coroutines */
64	int gencnt; /* generation counter */
65		136
66	coro_context cctx;	137	/* the stack */
67
68	void *sptr;	138	void *sptr;
69	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
70	} coro_stack;
71		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, /* ahs never been switched to */
		158	};
		159
		160	/* this is a structure representing a perl-level coroutine */
72	struct coro {	161	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	162	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;	163	coro_cctx *cctx;
75
76	/* the optional C context */
77	coro_stack *stack;
78	void *cursp;
79	int gencnt;
80
81	/* optionally saved, might be zero */
82	AV *defav;
83	SV *defsv;
84	SV *errsv;
85
86	/* saved global state not related to stacks */
87	U8 dowarn;
88	I32 in_eval;
89
90	/* the stacks and related info (callchain etc..) */
91	PERL_SI *curstackinfo;
92	AV *curstack;
93	AV *mainstack;
94	SV **stack_sp;
95	OP *op;
96	SV **curpad;
97	AV *comppad;
98	SV **stack_base;
99	SV **stack_max;
100	SV **tmps_stack;
101	I32 tmps_floor;
102	I32 tmps_ix;
103	I32 tmps_max;
104	I32 *markstack;
105	I32 *markstack_ptr;
106	I32 *markstack_max;
107	I32 *scopestack;
108	I32 scopestack_ix;
109	I32 scopestack_max;
110	ANY *savestack;
111	I32 savestack_ix;
112	I32 savestack_max;
113	OP **retstack;
114	I32 retstack_ix;
115	I32 retstack_max;
116	COP *curcop;
117	JMPENV *top_env;
118		164
119	/* data associated with this coroutine (initial args) */	165	/* data associated with this coroutine (initial args) */
120	AV *args;	166	AV *args;
		167	int refcnt;
		168	int save; /* CORO_SAVE flags */
		169	int flags; /* CF_ flags */
		170
		171	/* optionally saved, might be zero */
		172	AV *defav; /* @_ */
		173	SV *defsv; /* $_ */
		174	SV *errsv; /* $@ */
		175	SV *irssv; /* $/ */
		176	SV *irssv_sv; /* real $/ cache */
		177
		178	#define VAR(name,type) type name;
		179	# include "state.h"
		180	#undef VAR
		181
		182	/* coro process data */
		183	int prio;
121	};	184	};
122		185
123	typedef struct coro *Coro__State;	186	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	187	typedef struct coro *Coro__State_or_hashref;
125		188
126	static AV *main_mainstack; /* used to differentiate between $main and others */	189	static AV *
127	static HV *coro_state_stash;	190	coro_clone_padlist (CV *cv)
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV *coro_mortal; /* will be freed after next transfer */
132
133	/* mostly copied from op.c:cv_clone2 */
134	STATIC AV *
135	clone_padlist (AV *protopadlist)
136	{	191	{
137	AV *av;	192	AV *padlist = CvPADLIST (cv);
138	I32 ix;
139	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
140	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
141	SV **pname = AvARRAY (protopad_name);
142	SV **ppad = AvARRAY (protopad);
143	I32 fname = AvFILLp (protopad_name);
144	I32 fpad = AvFILLp (protopad);
145	AV *newpadlist, *newpad_name, *newpad;	193	AV *newpadlist, *newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		194
156	newpadlist = newAV ();	195	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	196	AvREAL_off (newpadlist);
158	av_store (newpadlist, 0, (SV *) newpad_name);	197	#if PERL_VERSION_ATLEAST (5,9,0)
		198	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		199	#else
		200	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		201	#endif
		202	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		203	--AvFILLp (padlist);
		204
		205	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
159	av_store (newpadlist, 1, (SV *) newpad);	206	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char *name = SvPVX (namesv); /* XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
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
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		207
226	return newpadlist;	208	return newpadlist;
227	}	209	}
228		210
229	STATIC void	211	static void
230	free_padlist (AV *padlist)	212	free_padlist (AV *padlist)
231	{	213	{
232	/* may be during global destruction */	214	/* may be during global destruction */
233	if (SvREFCNT (padlist))	215	if (SvREFCNT (padlist))
234	{	216	{
…		…
248		230
249	SvREFCNT_dec ((SV*)padlist);	231	SvREFCNT_dec ((SV*)padlist);
250	}	232	}
251	}	233	}
252		234
253	STATIC int	235	static int
254	coro_cv_free (SV *sv, MAGIC *mg)	236	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255	{	237	{
256	AV *padlist;	238	AV *padlist;
257	AV *av = (AV *)mg->mg_obj;	239	AV *av = (AV *)mg->mg_obj;
258		240
259	/* casting is fun. */	241	/* casting is fun. */
260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	242	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261	free_padlist (padlist);	243	free_padlist (padlist);
		244
		245	SvREFCNT_dec (av);
		246
		247	return 0;
262	}	248	}
263		249
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	250	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		251
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	252	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		253
		254	#define CORO_MAGIC(cv) \
		255	SvMAGIC (cv) \
		256	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		257	? SvMAGIC (cv) \
		258	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		259	: 0
		260
268	/* the next two functions merely cache the padlists */	261	/* the next two functions merely cache the padlists */
269	STATIC void	262	static void
270	get_padlist (CV *cv)	263	get_padlist (CV *cv)
271	{	264	{
272	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	265	MAGIC *mg = CORO_MAGIC (cv);
		266	AV *av;
273		267
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	268	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
275	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	269	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276	else	270	else
		271	{
		272	#if PREFER_PERL_FUNCTIONS
		273	/* this is probably cleaner, but also slower? */
		274	CV *cp = Perl_cv_clone (cv);
		275	CvPADLIST (cv) = CvPADLIST (cp);
		276	CvPADLIST (cp) = 0;
		277	SvREFCNT_dec (cp);
		278	#else
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	279	CvPADLIST (cv) = coro_clone_padlist (cv);
		280	#endif
		281	}
278	}	282	}
279		283
280	STATIC void	284	static void
281	put_padlist (CV *cv)	285	put_padlist (CV *cv)
282	{	286	{
283	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	287	MAGIC *mg = CORO_MAGIC (cv);
		288	AV *av;
284		289
285	if (!mg)	290	if (!mg)
286	{	291	{
287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	292	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	293	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289	mg->mg_virtual = &vtbl_coro;	294	mg->mg_virtual = &vtbl_coro;
290	mg->mg_obj = (SV *)newAV ();	295	mg->mg_obj = (SV *)newAV ();
291	}	296	}
292		297
293	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	298	av = (AV *)mg->mg_obj;
		299
		300	if (AvFILLp (av) >= AvMAX (av))
		301	av_extend (av, AvMAX (av) + 1);
		302
		303	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
294	}	304	}
295		305
296	#define SB do {	306	#define SB do {
297	#define SE } while (0)	307	#define SE } while (0)
298		308
299	#define LOAD(state) load_state(aTHX_ (state));
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
301
302	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	309	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
303		310
304	static void	311	static void
305	load_state(pTHX_ Coro__State c)	312	load_perl (Coro__State c)
306	{	313	{
307	PL_dowarn = c->dowarn;	314	#define VAR(name,type) PL_ ## name = c->name;
308	PL_in_eval = c->in_eval;	315	# include "state.h"
309		316	#undef VAR
310	PL_curstackinfo = c->curstackinfo;
311	PL_curstack = c->curstack;
312	PL_mainstack = c->mainstack;
313	PL_stack_sp = c->stack_sp;
314	PL_op = c->op;
315	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;
317	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;
322	PL_tmps_max = c->tmps_max;
323	PL_markstack = c->markstack;
324	PL_markstack_ptr = c->markstack_ptr;
325	PL_markstack_max = c->markstack_max;
326	PL_scopestack = c->scopestack;
327	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;
332	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;
335	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337		317
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		321	if (c->irssv)
		322	{
		323	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		324	SvREFCNT_dec (c->irssv);
		325	else
		326	{
		327	REPLACE_SV (PL_rs, c->irssv);
		328	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		329	sv_setsv (c->irssv_sv, PL_rs);
		330	}
		331	}
341		332
342	{	333	{
343	dSP;	334	dSP;
344	CV *cv;	335	CV *cv;
345		336
346	/* now do the ugly restore mess */	337	/* now do the ugly restore mess */
347	while ((cv = (CV *)POPs))	338	while ((cv = (CV *)POPs))
348	{	339	{
349	AV *padlist = (AV *)POPs;
350
351	if (padlist)
352	{
353	put_padlist (cv); /* mark this padlist as available */	340	put_padlist (cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	341	CvDEPTH (cv) = PTR2IV (POPs);
355	#ifdef USE_THREADS	342	CvPADLIST (cv) = (AV *)POPs;
356	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357	#endif
358	}
359
360	++CvDEPTH(cv);
361	}	343	}
362		344
363	PUTBACK;	345	PUTBACK;
364	}	346	}
365	}	347	}
366		348
367	static void	349	static void
368	save_state(pTHX_ Coro__State c, int flags)	350	save_perl (Coro__State c)
369	{	351	{
370	{	352	{
371	dSP;	353	dSP;
372	I32 cxix = cxstack_ix;	354	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	355	PERL_CONTEXT *ccstk = cxstack;
…		…
376	/*	358	/*
377	* the worst thing you can imagine happens first - we have to save	359	* the worst thing you can imagine happens first - we have to save
378	* (and reinitialize) all cv's in the whole callchain :(	360	* (and reinitialize) all cv's in the whole callchain :(
379	*/	361	*/
380		362
		363	EXTEND (SP, 3 + 1);
381	PUSHs (Nullsv);	364	PUSHs (Nullsv);
382	/* this loop was inspired by pp_caller */	365	/* this loop was inspired by pp_caller */
383	for (;;)	366	for (;;)
384	{	367	{
385	while (cxix >= 0)	368	while (cxix >= 0)
386	{	369	{
387	PERL_CONTEXT *cx = &ccstk[cxix--];	370	PERL_CONTEXT *cx = &ccstk[cxix--];
388		371
389	if (CxTYPE(cx) == CXt_SUB)	372	if (CxTYPE (cx) == CXt_SUB)
390	{	373	{
391	CV *cv = cx->blk_sub.cv;	374	CV *cv = cx->blk_sub.cv;
		375
392	if (CvDEPTH(cv))	376	if (CvDEPTH (cv))
393	{	377	{
394	#ifdef USE_THREADS
395	/*XPUSHs ((SV *)CvOWNER(cv));*/
396	/*CvOWNER(cv) = 0;*/
397	/*error must unlock this cv etc.. etc...*/
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	378	EXTEND (SP, 3);
400
401	while (--CvDEPTH(cv))
402	{
403	/* this tells the restore code to increment CvDEPTH */
404	PUSHs (Nullsv);
405	PUSHs ((SV *)cv);
406	}
407
408	PUSHs ((SV *)CvPADLIST(cv));	379	PUSHs ((SV *)CvPADLIST (cv));
		380	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
409	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
410		382
		383	CvDEPTH (cv) = 0;
411	get_padlist (cv); /* this is a monster */	384	get_padlist (cv);
412	}	385	}
413	}	386	}
414	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)
416	{
417	/* I never used formats, so how should I know how these are implemented? */
418	/* my bold guess is as a simple, plain sub... */
419	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420	}
421	#endif
422	}	387	}
423		388
424	if (top_si->si_type == PERLSI_MAIN)	389	if (top_si->si_type == PERLSI_MAIN)
425	break;	390	break;
426		391
…		…
430	}	395	}
431		396
432	PUTBACK;	397	PUTBACK;
433	}	398	}
434		399
435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		403	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
438		404
439	c->dowarn = PL_dowarn;	405	#define VAR(name,type)c->name = PL_ ## name;
440	c->in_eval = PL_in_eval;	406	# include "state.h"
441		407	#undef VAR
442	c->curstackinfo = PL_curstackinfo;
443	c->curstack = PL_curstack;
444	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;
446	c->op = PL_op;
447	c->curpad = PL_curpad;
448	c->comppad = PL_comppad;
449	c->stack_base = PL_stack_base;
450	c->stack_max = PL_stack_max;
451	c->tmps_stack = PL_tmps_stack;
452	c->tmps_floor = PL_tmps_floor;
453	c->tmps_ix = PL_tmps_ix;
454	c->tmps_max = PL_tmps_max;
455	c->markstack = PL_markstack;
456	c->markstack_ptr = PL_markstack_ptr;
457	c->markstack_max = PL_markstack_max;
458	c->scopestack = PL_scopestack;
459	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;
464	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;
467	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	408	}
470		409
471	/*	410	/*
472	* allocate various perl stacks. This is an exact copy	411	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	412	* of perl.c:init_stacks, except that it uses less memory
474	* on the (sometimes correct) assumption that coroutines do	413	* on the (sometimes correct) assumption that coroutines do
475	* not usually need a lot of stackspace.	414	* not usually need a lot of stackspace.
476	*/	415	*/
477	STATIC void	416	#if PREFER_PERL_FUNCTIONS
		417	# define coro_init_stacks init_stacks
		418	#else
		419	static void
478	coro_init_stacks (pTHX)	420	coro_init_stacks ()
479	{	421	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	422	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
481	PL_curstackinfo->si_type = PERLSI_MAIN;	423	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	424	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	425	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484		426
485	PL_stack_base = AvARRAY(PL_curstack);	427	PL_stack_base = AvARRAY(PL_curstack);
486	PL_stack_sp = PL_stack_base;	428	PL_stack_sp = PL_stack_base;
487	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	429	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488		430
489	New(50,PL_tmps_stack,96,SV*);	431	New(50,PL_tmps_stack,128,SV*);
490	PL_tmps_floor = -1;	432	PL_tmps_floor = -1;
491	PL_tmps_ix = -1;	433	PL_tmps_ix = -1;
492	PL_tmps_max = 96;	434	PL_tmps_max = 128;
493		435
494	New(54,PL_markstack,16,I32);	436	New(54,PL_markstack,32,I32);
495	PL_markstack_ptr = PL_markstack;	437	PL_markstack_ptr = PL_markstack;
496	PL_markstack_max = PL_markstack + 16;	438	PL_markstack_max = PL_markstack + 32;
497		439
498	#ifdef SET_MARK_OFFSET	440	#ifdef SET_MARK_OFFSET
499	SET_MARK_OFFSET;	441	SET_MARK_OFFSET;
500	#endif	442	#endif
501		443
502	New(54,PL_scopestack,16,I32);	444	New(54,PL_scopestack,32,I32);
503	PL_scopestack_ix = 0;	445	PL_scopestack_ix = 0;
504	PL_scopestack_max = 16;	446	PL_scopestack_max = 32;
505		447
506	New(54,PL_savestack,96,ANY);	448	New(54,PL_savestack,64,ANY);
507	PL_savestack_ix = 0;	449	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	450	PL_savestack_max = 64;
509		451
		452	#if !PERL_VERSION_ATLEAST (5,9,0)
510	New(54,PL_retstack,8,OP*);	453	New(54,PL_retstack,16,OP*);
511	PL_retstack_ix = 0;	454	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	455	PL_retstack_max = 16;
		456	#endif
513	}	457	}
		458	#endif
514		459
515	/*	460	/*
516	* destroy the stacks, the callchain etc...	461	* destroy the stacks, the callchain etc...
517	*/	462	*/
518	STATIC void	463	static void
519	destroy_stacks(pTHX)	464	coro_destroy_stacks ()
520	{	465	{
521	if (!IN_DESTRUCT)	466	if (!IN_DESTRUCT)
522	{	467	{
523	/* is this ugly, I ask? */	468	/* restore all saved variables and stuff */
524	LEAVE_SCOPE (0);	469	LEAVE_SCOPE (0);
		470	assert (PL_tmps_floor == -1);
525		471
526	/* sure it is, but more important: is it correct?? :/ */	472	/* free all temporaries */
527	FREETMPS;	473	FREETMPS;
		474	assert (PL_tmps_ix == -1);
		475
		476	POPSTACK_TO (PL_mainstack);
528	}	477	}
529		478
530	while (PL_curstackinfo->si_next)	479	while (PL_curstackinfo->si_next)
531	PL_curstackinfo = PL_curstackinfo->si_next;	480	PL_curstackinfo = PL_curstackinfo->si_next;
532		481
533	while (PL_curstackinfo)	482	while (PL_curstackinfo)
534	{	483	{
535	PERL_SI *p = PL_curstackinfo->si_prev;	484	PERL_SI *p = PL_curstackinfo->si_prev;
536		485
537	{
538	dSP;
539	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540	PUTBACK; /* possibly superfluous */
541	}
542
543	if (!IN_DESTRUCT)	486	if (!IN_DESTRUCT)
544	{
545	dounwind(-1);
546	SvREFCNT_dec(PL_curstackinfo->si_stack);	487	SvREFCNT_dec (PL_curstackinfo->si_stack);
547	}
548		488
549	Safefree(PL_curstackinfo->si_cxstack);	489	Safefree (PL_curstackinfo->si_cxstack);
550	Safefree(PL_curstackinfo);	490	Safefree (PL_curstackinfo);
551	PL_curstackinfo = p;	491	PL_curstackinfo = p;
552	}	492	}
553		493
554	Safefree(PL_tmps_stack);	494	Safefree (PL_tmps_stack);
555	Safefree(PL_markstack);	495	Safefree (PL_markstack);
556	Safefree(PL_scopestack);	496	Safefree (PL_scopestack);
557	Safefree(PL_savestack);	497	Safefree (PL_savestack);
		498	#if !PERL_VERSION_ATLEAST (5,9,0)
558	Safefree(PL_retstack);	499	Safefree (PL_retstack);
559	}
560
561	static void
562	allocate_stack (Coro__State ctx, int alloc)
563	{
564	coro_stack *stack;
565
566	New (0, stack, 1, coro_stack);
567
568	stack->refcnt = 1;
569	stack->usecnt = 1;
570	stack->gencnt = ctx->gencnt = 0;
571	if (alloc)
572	{
573	#if HAVE_MMAP
574	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
575	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
576	if (stack->sptr == (void *)-1)
577	#endif	500	#endif
578	{
579	/*FIXME*//*D*//* reasonable stack size! */
580	stack->ssize = - (8192 * sizeof (long));
581	New (0, stack->sptr, 8192, long);
582	}
583	}
584	else
585	stack->sptr = 0;
586
587	ctx->stack = stack;
588	}	501	}
589		502
590	static void	503	static void
591	deallocate_stack (Coro__State ctx)	504	setup_coro (struct coro *coro)
592	{
593	coro_stack *stack = ctx->stack;
594
595	ctx->stack = 0;
596
597	if (stack)
598	{
599	if (!--stack->refcnt)
600	{
601	#ifdef HAVE_MMAP
602	if (stack->ssize > 0 && stack->sptr)
603	munmap (stack->sptr, stack->ssize);
604	else
605	#endif
606	Safefree (stack->sptr);
607
608	Safefree (stack);
609	}
610	else if (ctx->gencnt == stack->gencnt)
611	--stack->usecnt;
612	}
613	}
614
615	static void
616	setup_coro (void *arg)
617	{	505	{
618	/*	506	/*
619	* emulate part of the perl startup here.	507	* emulate part of the perl startup here.
620	*/	508	*/
		509
		510	coro_init_stacks ();
		511
		512	PL_curcop = &PL_compiling;
		513	PL_in_eval = EVAL_NULL;
		514	PL_curpm = 0;
		515	PL_localizing = 0;
		516	PL_dirty = 0;
		517	PL_restartop = 0;
		518
		519	{
		520	dSP;
		521	LOGOP myop;
		522
		523	SvREFCNT_dec (GvAV (PL_defgv));
		524	GvAV (PL_defgv) = coro->args; coro->args = 0;
		525
		526	Zero (&myop, 1, LOGOP);
		527	myop.op_next = Nullop;
		528	myop.op_flags = OPf_WANT_VOID;
		529
		530	PUSHMARK (SP);
		531	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		532	PUTBACK;
		533	PL_op = (OP *)&myop;
		534	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		535	SPAGAIN;
		536	}
		537
		538	ENTER; /* necessary e.g. for dounwind */
		539	}
		540
		541	static void
		542	free_coro_mortal ()
		543	{
		544	if (coro_mortal)
		545	{
		546	SvREFCNT_dec (coro_mortal);
		547	coro_mortal = 0;
		548	}
		549	}
		550
		551	/* inject a fake call to Coro::State::_cctx_init into the execution */
		552	static void NOINLINE
		553	prepare_cctx (coro_cctx *cctx)
		554	{
621	dSP;	555	dSP;
622	Coro__State ctx = (Coro__State)arg;	556	LOGOP myop;
623	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
624		557
625	coro_init_stacks (aTHX);	558	Zero (&myop, 1, LOGOP);
626	/*PL_curcop = 0;*/	559	myop.op_next = PL_op;
627	/*PL_in_eval = PL_in_eval;*/ /* inherit */	560	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
628	SvREFCNT_dec (GvAV (PL_defgv));
629	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
630		561
		562	PUSHMARK (SP);
		563	EXTEND (SP, 2);
		564	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		565	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		566	PUTBACK;
		567	PL_op = (OP *)&myop;
		568	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631	SPAGAIN;	569	SPAGAIN;
632
633	if (ctx->stack)
634	{
635	ctx->cursp = 0;
636
637	PUSHMARK(SP);
638	PUTBACK;
639	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
640
641	if (SvTRUE (ERRSV))
642	croak (NULL);
643	else
644	croak ("FATAL: CCTXT coroutine returned!");
645	}
646	else
647	{
648	UNOP myop;
649
650	PL_op = (OP *)&myop;
651
652	Zero(&myop, 1, UNOP);
653	myop.op_next = Nullop;
654	myop.op_flags = OPf_WANT_VOID;
655
656	PUSHMARK(SP);
657	XPUSHs (sub_init);
658	/*
659	* the next line is slightly wrong, as PL_op->op_next
660	* is actually being executed so we skip the first op.
661	* that doesn't matter, though, since it is only
662	* pp_nextstate and we never return...
663	* ah yes, and I don't care anyways ;)
664	*/
665	PUTBACK;
666	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667	SPAGAIN;
668
669	ENTER; /* necessary e.g. for dounwind */
670	}
671	}	570	}
672		571
673	static void	572	static void
674	continue_coro (void *arg)	573	coro_run (void *arg)
675	{	574	{
		575	/* coro_run is the alternative tail of transfer(), so unlock here. */
		576	UNLOCK;
		577
676	/*	578	/*
677	* this is a _very_ stripped down perl interpreter ;)	579	* this is a _very_ stripped down perl interpreter ;)
678	*/	580	*/
679	Coro__State ctx = (Coro__State)arg;
680	JMPENV coro_start_env;
681
682	PL_top_env = &ctx->start_env;	581	PL_top_env = &PL_start_env;
683		582
684	ctx->cursp = 0;	583	/* inject call to cctx_init */
685	PL_op = PL_op->op_next;	584	prepare_cctx ((coro_cctx *)arg);
686	CALLRUNOPS(aTHX);
687		585
		586	/* somebody will hit me for both perl_run and PL_restartop */
		587	PL_restartop = PL_op;
		588	perl_run (PL_curinterp);
		589
		590	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
688	abort ();	591	abort ();
689	}	592	}
690		593
691	STATIC void	594	static coro_cctx *
		595	cctx_new ()
		596	{
		597	coro_cctx *cctx;
		598
		599	++cctx_count;
		600
		601	Newz (0, cctx, 1, coro_cctx);
		602
		603	#if HAVE_MMAP
		604
		605	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		606	/* mmap supposedly does allocate-on-write for us */
		607	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		608
		609	if (cctx->sptr == (void *)-1)
		610	{
		611	perror ("FATAL: unable to mmap stack for coroutine");
		612	_exit (EXIT_FAILURE);
		613	}
		614
		615	# if STACKGUARD
		616	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		617	# endif
		618
		619	#else
		620
		621	cctx->ssize = STACKSIZE * (long)sizeof (long);
		622	New (0, cctx->sptr, STACKSIZE, long);
		623
		624	if (!cctx->sptr)
		625	{
		626	perror ("FATAL: unable to malloc stack for coroutine");
		627	_exit (EXIT_FAILURE);
		628	}
		629
		630	#endif
		631
		632	#if USE_VALGRIND
		633	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		634	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		635	cctx->ssize + (char *)cctx->sptr
		636	);
		637	#endif
		638
		639	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		640
		641	return cctx;
		642	}
		643
		644	static void
		645	cctx_destroy (coro_cctx *cctx)
		646	{
		647	if (!cctx)
		648	return;
		649
		650	--cctx_count;
		651
		652	#if USE_VALGRIND
		653	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		654	#endif
		655
		656	#if HAVE_MMAP
		657	munmap (cctx->sptr, cctx->ssize);
		658	#else
		659	Safefree (cctx->sptr);
		660	#endif
		661
		662	Safefree (cctx);
		663	}
		664
		665	static coro_cctx *
		666	cctx_get ()
		667	{
		668	coro_cctx *cctx;
		669
		670	if (cctx_first)
		671	{
		672	cctx = cctx_first;
		673	cctx_first = cctx->next;
		674	--cctx_idle;
		675	}
		676	else
		677	{
		678	cctx = cctx_new ();
		679	PL_op = PL_op->op_next;
		680	}
		681
		682	return cctx;
		683	}
		684
		685	static void
		686	cctx_put (coro_cctx *cctx)
		687	{
		688	/* free another cctx if overlimit */
		689	if (cctx_idle >= MAX_IDLE_CCTX)
		690	{
		691	coro_cctx *first = cctx_first;
		692	cctx_first = first->next;
		693	--cctx_idle;
		694
		695	assert (!first->inuse);
		696	cctx_destroy (first);
		697	}
		698
		699	++cctx_idle;
		700	cctx->next = cctx_first;
		701	cctx_first = cctx;
		702	}
		703
		704	/* never call directly, always through the coro_state_transfer global variable */
		705	static void NOINLINE
692	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	706	transfer (struct coro *prev, struct coro *next)
693	{	707	{
694	dSTACKLEVEL;	708	dSTACKLEVEL;
695	static struct coro *xnext;
696		709
		710	/* sometimes transfer is only called to set idle_sp */
		711	if (!next)
		712	{
		713	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		714	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		715	}
697	if (prev != next)	716	else if (prev != next)
698	{	717	{
699	xnext = next;	718	coro_cctx *prev__cctx;
700		719
701	if (next->mainstack)	720	if (prev->flags & CF_NEW)
702	{	721	{
703	SAVE (prev, flags);	722	/* create a new empty context */
704	LOAD (next);	723	Newz (0, prev->cctx, 1, coro_cctx);
705		724	prev->cctx->inuse = 1;
706	/* mark this state as in-use */	725	prev->flags &= ~CF_NEW;
707	next->mainstack = 0;	726	prev->flags |= CF_RUNNING;
708	next->tmps_ix = -2;
709
710	/* stacklevel changed? if yes, grab the stack for us! */
711	if (flags & TRANSFER_SAVE_CCTXT)
712	{
713	if (!prev->stack)
714	allocate_stack (prev, 0);
715	else if (prev->cursp != stacklevel
716	&& prev->stack->usecnt > 1)
717	{
718	prev->gencnt = ++prev->stack->gencnt;
719	prev->stack->usecnt = 1;
720	}
721
722	/* has our stack been invalidated? */
723	if (next->stack && next->stack->gencnt != next->gencnt)
724	{
725	deallocate_stack (next);
726	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),
728	continue_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));
730	}
731
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	/* don't add any code here */
734	}
735
736	}	727	}
737	else if (next->tmps_ix == -2)	728
738	croak ("tried to transfer to running coroutine");	729	/*TODO: must not croak here */
		730	if (!prev->flags & CF_RUNNING)
		731	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		732
		733	if (next->flags & CF_RUNNING)
		734	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		735
		736	prev->flags &= ~CF_RUNNING;
		737	next->flags |= CF_RUNNING;
		738
		739	LOCK;
		740
		741	if (next->flags & CF_NEW)
		742	{
		743	/* need to start coroutine */
		744	next->flags &= ~CF_NEW;
		745	/* first get rid of the old state */
		746	save_perl (prev);
		747	/* setup coroutine call */
		748	setup_coro (next);
		749	/* need a new stack */
		750	assert (!next->cctx);
		751	}
739	else	752	else
740	{	753	{
741	SAVE (prev, -1); /* first get rid of the old state */	754	/* coroutine already started */
742		755	save_perl (prev);
743	if (flags & TRANSFER_SAVE_CCTXT)	756	load_perl (next);
744	{
745	if (!prev->stack)
746	allocate_stack (prev, 0);
747
748	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
749	{
750	PL_top_env = &next->start_env;
751
752	setup_coro (next);
753
754	prev->stack->refcnt++;
755	prev->stack->usecnt++;
756	next->stack = prev->stack;
757	next->gencnt = prev->gencnt;
758	}
759	else
760	{
761	assert (!next->stack);
762	allocate_stack (next, 1);
763	coro_create (&(next->stack->cctx),
764	setup_coro, (void *)next,
765	next->stack->sptr, labs (next->stack->ssize));
766	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767	/* don't add any code here */
768	}
769	}
770	else
771	setup_coro (next);
772	}	757	}
773		758
774	/*	759	prev__cctx = prev->cctx;
775	* xnext is now either prev or next, depending on wether	760
776	* we switched the c stack or not. that's why I use a global	761	/* possibly "free" the cctx */
777	* variable, that should become thread-specific at one point.	762	if (prev__cctx->idle_sp == STACKLEVEL)
778	*/	763	{
779	xnext->cursp = stacklevel;	764	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
780	}	765	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
781		766
782	if (coro_mortal)	767	prev->cctx = 0;
		768
		769	cctx_put (prev__cctx);
		770	prev__cctx->inuse = 0;
		771	}
		772
		773	if (!next->cctx)
		774	{
		775	next->cctx = cctx_get ();
		776	assert (!next->cctx->inuse);
		777	next->cctx->inuse = 1;
		778	}
		779
		780	if (prev__cctx != next->cctx)
		781	{
		782	prev__cctx->top_env = PL_top_env;
		783	PL_top_env = next->cctx->top_env;
		784	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		785	}
		786
		787	free_coro_mortal ();
		788
		789	UNLOCK;
783	{	790	}
784	SvREFCNT_dec (coro_mortal);	791	}
785	coro_mortal = 0;	792
		793	struct transfer_args
		794	{
		795	struct coro *prev, *next;
		796	};
		797
		798	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		799
		800	static void
		801	coro_state_destroy (struct coro *coro)
		802	{
		803	if (coro->refcnt--)
		804	return;
		805
		806	if (coro->mainstack && coro->mainstack != main_mainstack)
786	}	807	{
787	}	808	struct coro temp;
		809	Zero (&temp, 1, struct coro);
		810	temp.save = CORO_SAVE_ALL;
788		811
789	#define SV_CORO(sv,func) \	812	if (coro->flags & CF_RUNNING)
790	do { \	813	croak ("FATAL: tried to destroy currently running coroutine");
791	if (SvROK (sv)) \
792	sv = SvRV (sv); \
793	\
794	if (SvTYPE(sv) == SVt_PVHV) \
795	{ \
796	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
797	\
798	if (!he) \
799	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800	\
801	(sv) = SvRV (HeVAL(he)); \
802	} \
803	\
804	/* must also be changed inside Coro::Cont::yield */ \
805	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
806	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807	\
808	} while(0)
809		814
810	#define SvSTATE(sv) (struct coro *)SvIV (sv)	815	save_perl (&temp);
		816	load_perl (coro);
811		817
		818	coro_destroy_stacks ();
		819
		820	load_perl (&temp); /* this will get rid of defsv etc.. */
		821
		822	coro->mainstack = 0;
		823	}
		824
		825	cctx_destroy (coro->cctx);
		826	SvREFCNT_dec (coro->args);
		827	Safefree (coro);
		828	}
		829
812	static void	830	static int
		831	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		832	{
		833	struct coro *coro = (struct coro *)mg->mg_ptr;
		834	mg->mg_ptr = 0;
		835
		836	coro_state_destroy (coro);
		837
		838	return 0;
		839	}
		840
		841	static int
		842	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		843	{
		844	struct coro *coro = (struct coro *)mg->mg_ptr;
		845
		846	++coro->refcnt;
		847
		848	return 0;
		849	}
		850
		851	static MGVTBL coro_state_vtbl = {
		852	0, 0, 0, 0,
		853	coro_state_clear,
		854	0,
		855	#ifdef MGf_DUP
		856	coro_state_dup,
		857	#else
		858	# define MGf_DUP 0
		859	#endif
		860	};
		861
		862	static struct coro *
		863	SvSTATE (SV *coro)
		864	{
		865	HV *stash;
		866	MAGIC *mg;
		867
		868	if (SvROK (coro))
		869	coro = SvRV (coro);
		870
		871	stash = SvSTASH (coro);
		872	if (stash != coro_stash && stash != coro_state_stash)
		873	{
		874	/* very slow, but rare, check */
		875	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		876	croak ("Coro::State object required");
		877	}
		878
		879	mg = SvMAGIC (coro);
		880	assert (mg->mg_type == PERL_MAGIC_ext);
		881	return (struct coro *)mg->mg_ptr;
		882	}
		883
		884	static void
		885	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		886	{
		887	ta->prev = SvSTATE (prev_sv);
		888	ta->next = SvSTATE (next_sv);
		889	}
		890
		891	static void
813	api_transfer(pTHX_ SV *prev, SV *next, int flags)	892	api_transfer (SV *prev_sv, SV *next_sv)
814	{	893	{
815	SV_CORO (prev, "Coro::transfer");	894	struct transfer_args ta;
816	SV_CORO (next, "Coro::transfer");
817		895
818	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	896	prepare_transfer (&ta, prev_sv, next_sv);
		897	TRANSFER (ta);
		898	}
		899
		900	static int
		901	api_save (SV *coro_sv, int new_save)
		902	{
		903	struct coro *coro = SvSTATE (coro_sv);
		904	int old_save = coro->save;
		905
		906	if (new_save >= 0)
		907	coro->save = new_save;
		908
		909	return old_save;
819	}	910	}
820		911
821	/** Coro ********************************************************************/	912	/** Coro ********************************************************************/
822		913
823	#define PRIO_MAX 3	914	#define PRIO_MAX 3
…		…
826	#define PRIO_LOW -1	917	#define PRIO_LOW -1
827	#define PRIO_IDLE -3	918	#define PRIO_IDLE -3
828	#define PRIO_MIN -4	919	#define PRIO_MIN -4
829		920
830	/* for Coro.pm */	921	/* for Coro.pm */
831	static GV *coro_current, *coro_idle;	922	static SV *coro_current;
832	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	923	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
833	static int coro_nready;	924	static int coro_nready;
834		925
835	static void	926	static void
836	coro_enq (SV *sv)	927	coro_enq (SV *coro_sv)
837	{	928	{
838	if (SvTYPE (sv) == SVt_PVHV)
839	{
840	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
841	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842
843	prio = prio > PRIO_MAX ? PRIO_MAX
844	: prio < PRIO_MIN ? PRIO_MIN
845	: prio;
846
847	av_push (coro_ready [prio - PRIO_MIN], sv);	929	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
848	coro_nready++;	930	coro_nready++;
849
850	return;
851	}
852
853	croak ("Coro::ready tried to enqueue something that is not a coroutine");
854	}	931	}
855		932
856	static SV *	933	static SV *
857	coro_deq (int min_prio)	934	coro_deq (int min_prio)
858	{	935	{
…		…
861	min_prio -= PRIO_MIN;	938	min_prio -= PRIO_MIN;
862	if (min_prio < 0)	939	if (min_prio < 0)
863	min_prio = 0;	940	min_prio = 0;
864		941
865	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	942	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
866	if (av_len (coro_ready[prio]) >= 0)	943	if (AvFILLp (coro_ready [prio]) >= 0)
867	{	944	{
868	coro_nready--;	945	coro_nready--;
869	return av_shift (coro_ready[prio]);	946	return av_shift (coro_ready [prio]);
870	}	947	}
871		948
872	return 0;	949	return 0;
873	}	950	}
874		951
875	static void	952	static int
876	api_ready (SV *coro)	953	api_ready (SV *coro_sv)
877	{	954	{
		955	struct coro *coro;
		956
878	if (SvROK (coro))	957	if (SvROK (coro_sv))
879	coro = SvRV (coro);	958	coro_sv = SvRV (coro_sv);
880		959
		960	coro = SvSTATE (coro_sv);
		961
		962	if (coro->flags & CF_READY)
		963	return 0;
		964
		965	coro->flags |= CF_READY;
		966
		967	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	968	coro_enq (SvREFCNT_inc (coro_sv));
		969	UNLOCK;
		970
		971	return 1;
		972	}
		973
		974	static int
		975	api_is_ready (SV *coro_sv)
		976	{
		977	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		978	}
		979
		980	static void
		981	prepare_schedule (struct transfer_args *ta)
		982	{
		983	SV *prev, *next;
		984
		985	for (;;)
		986	{
		987	LOCK;
		988	next = coro_deq (PRIO_MIN);
		989	UNLOCK;
		990
		991	if (next)
		992	break;
		993
		994	{
		995	dSP;
		996
		997	ENTER;
		998	SAVETMPS;
		999
		1000	PUSHMARK (SP);
		1001	PUTBACK;
		1002	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1003
		1004	FREETMPS;
		1005	LEAVE;
		1006	}
		1007	}
		1008
		1009	prev = SvRV (coro_current);
		1010	SvRV_set (coro_current, next);
		1011
		1012	/* free this only after the transfer */
		1013	LOCK;
		1014	free_coro_mortal ();
		1015	UNLOCK;
		1016	coro_mortal = prev;
		1017
		1018	assert (!SvROK(prev));//D
		1019	assert (!SvROK(next));//D
		1020
		1021	ta->prev = SvSTATE (prev);
		1022	ta->next = SvSTATE (next);
		1023
		1024	assert (ta->next->flags & CF_READY);
		1025	ta->next->flags &= ~CF_READY;
		1026	}
		1027
		1028	static void
		1029	prepare_cede (struct transfer_args *ta)
		1030	{
		1031	api_ready (coro_current);
		1032	prepare_schedule (ta);
		1033	}
		1034
		1035	static int
		1036	prepare_cede_notself (struct transfer_args *ta)
		1037	{
		1038	if (coro_nready)
		1039	{
		1040	SV *prev = SvRV (coro_current);
		1041	prepare_schedule (ta);
		1042	api_ready (prev);
		1043	return 1;
		1044	}
		1045	else
		1046	return 0;
882	}	1047	}
883		1048
884	static void	1049	static void
885	api_schedule (void)	1050	api_schedule (void)
886	{	1051	{
887	SV *prev, *next;	1052	struct transfer_args ta;
888		1053
889	prev = SvRV (GvSV (coro_current));	1054	prepare_schedule (&ta);
890	next = coro_deq (PRIO_MIN);	1055	TRANSFER (ta);
891
892	if (!next)
893	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
894
895	/* free this only after the transfer */
896	coro_mortal = prev;
897	SV_CORO (prev, "Coro::schedule");
898
899	SvRV (GvSV (coro_current)) = next;
900
901	SV_CORO (next, "Coro::schedule");
902
903	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
904	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
905	}	1056	}
906		1057
907	static void	1058	static int
908	api_cede (void)	1059	api_cede (void)
909	{	1060	{
910	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1061	struct transfer_args ta;
911		1062
912	api_schedule ();	1063	prepare_cede (&ta);
		1064
		1065	if (ta.prev != ta.next)
		1066	{
		1067	TRANSFER (ta);
		1068	return 1;
		1069	}
		1070	else
		1071	return 0;
		1072	}
		1073
		1074	static int
		1075	api_cede_notself (void)
		1076	{
		1077	struct transfer_args ta;
		1078
		1079	if (prepare_cede_notself (&ta))
		1080	{
		1081	TRANSFER (ta);
		1082	return 1;
		1083	}
		1084	else
		1085	return 0;
913	}	1086	}
914		1087
915	MODULE = Coro::State PACKAGE = Coro::State	1088	MODULE = Coro::State PACKAGE = Coro::State
916		1089
917	PROTOTYPES: ENABLE	1090	PROTOTYPES: DISABLE
918		1091
919	BOOT:	1092	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1093	{
921	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1094	#ifdef USE_ITHREADS
922	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1095	MUTEX_INIT (&coro_mutex);
		1096	#endif
		1097	BOOT_PAGESIZE;
		1098
923	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1099	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924		1100
925	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1101	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
926	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1102	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
927	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1103	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1104	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
928	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1105	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
929
930	if (!padlist_cache)
931	padlist_cache = newHV ();
932		1106
933	main_mainstack = PL_mainstack;	1107	main_mainstack = PL_mainstack;
934		1108
935	coroapi.ver = CORO_API_VERSION;	1109	coroapi.ver = CORO_API_VERSION;
936	coroapi.transfer = api_transfer;	1110	coroapi.transfer = api_transfer;
937	}
938		1111
939	Coro::State	1112	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
940	_newprocess(args)	1113	}
941	SV * args	1114
942	PROTOTYPE: $	1115	SV *
		1116	new (char *klass, ...)
943	CODE:	1117	CODE:
944	Coro__State coro;	1118	{
		1119	struct coro *coro;
		1120	HV *hv;
		1121	int i;
945		1122
946	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
947	croak ("Coro::State::_newprocess expects an arrayref");
948
949	Newz (0, coro, 1, struct coro);	1123	Newz (0, coro, 1, struct coro);
		1124	coro->args = newAV ();
		1125	coro->save = CORO_SAVE_ALL;
		1126	coro->flags = CF_NEW;
950		1127
951	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1128	hv = newHV ();
952	coro->mainstack = 0; /* actual work is done inside transfer */	1129	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
953	coro->stack = 0;	1130	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
954		1131
955	/* same as JMPENV_BOOTSTRAP */	1132	for (i = 1; i < items; i++)
956	/* we might be able to recycle start_env, but safe is safe */	1133	av_push (coro->args, newSVsv (ST (i)));
957	//Zero(&coro->start_env, 1, JMPENV);	1134	}
958	coro->start_env.je_ret = -1;
959	coro->start_env.je_mustcatch = TRUE;
960
961	RETVAL = coro;
962	OUTPUT:	1135	OUTPUT:
963	RETVAL	1136	RETVAL
964		1137
		1138	int
		1139	save (SV *coro, int new_save = -1)
		1140	CODE:
		1141	RETVAL = api_save (coro, new_save);
		1142	OUTPUT:
		1143	RETVAL
		1144
965	void	1145	void
966	transfer(prev, next, flags)	1146	_set_stacklevel (...)
967	SV *prev	1147	ALIAS:
968	SV *next	1148	Coro::State::transfer = 1
969	int flags	1149	Coro::schedule = 2
970	PROTOTYPE: @	1150	Coro::cede = 3
		1151	Coro::cede_notself = 4
971	CODE:	1152	CODE:
972	PUTBACK;	1153	{
973	SV_CORO (next, "Coro::transfer");	1154	struct transfer_args ta;
974	SV_CORO (prev, "Coro::transfer");	1155
975	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1156	switch (ix)
976	SPAGAIN;	1157	{
		1158	case 0:
		1159	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1160	ta.next = 0;
		1161	break;
		1162
		1163	case 1:
		1164	if (items != 2)
		1165	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1166
		1167	prepare_transfer (&ta, ST (0), ST (1));
		1168	break;
		1169
		1170	case 2:
		1171	prepare_schedule (&ta);
		1172	break;
		1173
		1174	case 3:
		1175	prepare_cede (&ta);
		1176	break;
		1177
		1178	case 4:
		1179	if (!prepare_cede_notself (&ta))
		1180	XSRETURN_EMPTY;
		1181
		1182	break;
		1183	}
		1184
		1185	BARRIER;
		1186	TRANSFER (ta);
		1187	}
977		1188
978	void	1189	void
979	DESTROY(coro)	1190	_clone_state_from (SV *dst, SV *src)
980	Coro::State coro	1191	CODE:
981	CODE:	1192	{
		1193	struct coro *coro_src = SvSTATE (src);
982		1194
983	if (coro->mainstack && coro->mainstack != main_mainstack)	1195	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
984	{
985	struct coro temp;
986		1196
987	PUTBACK;	1197	++coro_src->refcnt;
988	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1198	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
989	LOAD(aTHX_ coro);	1199	}
990	SPAGAIN;
991
992	destroy_stacks (aTHX);
993
994	LOAD((&temp)); /* this will get rid of defsv etc.. */
995	SPAGAIN;
996
997	coro->mainstack = 0;
998	}
999
1000	deallocate_stack (coro);
1001	SvREFCNT_dec (coro->args);
1002	Safefree (coro);
1003		1200
1004	void	1201	void
1005	_exit(code)	1202	_exit (code)
1006	int code	1203	int code
1007	PROTOTYPE: $	1204	PROTOTYPE: $
1008	CODE:	1205	CODE:
1009	_exit (code);	1206	_exit (code);
1010		1207
1011	MODULE = Coro::State PACKAGE = Coro::Cont	1208	int
		1209	cctx_count ()
		1210	CODE:
		1211	RETVAL = cctx_count;
		1212	OUTPUT:
		1213	RETVAL
1012		1214
1013	# this is slightly dirty (should expose a c-level api)	1215	int
1014		1216	cctx_idle ()
1015	void	1217	CODE:
1016	yield(...)	1218	RETVAL = cctx_idle;
1017	PROTOTYPE: @	1219	OUTPUT:
1018	CODE:	1220	RETVAL
1019	static SV *returnstk;
1020	SV *sv;
1021	AV *defav = GvAV (PL_defgv);
1022	struct coro *prev, *next;
1023
1024	if (!returnstk)
1025	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1026
1027	/* set up @_ -- ugly */
1028	av_clear (defav);
1029	av_fill (defav, items - 1);
1030	while (items--)
1031	av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1034	sv = av_pop ((AV *)SvRV (returnstk));
1035	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1036	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1037	SvREFCNT_dec (sv);
1038
1039	transfer(aTHX_ prev, next, 0);
1040		1221
1041	MODULE = Coro::State PACKAGE = Coro	1222	MODULE = Coro::State PACKAGE = Coro
1042		1223
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1224	BOOT:
1046	{	1225	{
1047	int i;	1226	int i;
		1227
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1228	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1229
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1230	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1231	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1232	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1233	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1234	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1235	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056		1236
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1237	coro_current = get_sv ("Coro::current", FALSE);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1238	SvREADONLY_on (coro_current);
1059		1239
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1240	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061	coro_ready[i] = newAV ();	1241	coro_ready[i] = newAV ();
1062		1242
1063	{	1243	{
1064	SV *sv = perl_get_sv("Coro::API", 1);	1244	SV *sv = perl_get_sv("Coro::API", 1);
1065		1245
1066	coroapi.schedule = api_schedule;	1246	coroapi.schedule = api_schedule;
		1247	coroapi.save = api_save;
1067	coroapi.cede = api_cede;	1248	coroapi.cede = api_cede;
		1249	coroapi.cede_notself = api_cede_notself;
1068	coroapi.ready = api_ready;	1250	coroapi.ready = api_ready;
		1251	coroapi.is_ready = api_is_ready;
1069	coroapi.nready = &coro_nready;	1252	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1253	coroapi.current = coro_current;
1071		1254
1072	GCoroAPI = &coroapi;	1255	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1256	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1257	SvREADONLY_on (sv);
1075	}	1258	}
1076	}	1259	}
1077		1260
1078	#if !PERL_MICRO
1079
1080	void	1261	void
1081	ready(self)	1262	_set_current (SV *current)
1082	SV * self
1083	PROTOTYPE: $	1263	PROTOTYPE: $
1084	CODE:	1264	CODE:
1085	api_ready (self);	1265	SvREFCNT_dec (SvRV (coro_current));
1086		1266	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1087	#endif
1088		1267
1089	int	1268	int
		1269	prio (Coro::State coro, int newprio = 0)
		1270	ALIAS:
		1271	nice = 1
		1272	CODE:
		1273	{
		1274	RETVAL = coro->prio;
		1275
		1276	if (items > 1)
		1277	{
		1278	if (ix)
		1279	newprio = coro->prio - newprio;
		1280
		1281	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1282	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1283
		1284	coro->prio = newprio;
		1285	}
		1286	}
		1287	OUTPUT:
		1288	RETVAL
		1289
		1290	SV *
		1291	ready (SV *self)
		1292	PROTOTYPE: $
		1293	CODE:
		1294	RETVAL = boolSV (api_ready (self));
		1295	OUTPUT:
		1296	RETVAL
		1297
		1298	SV *
		1299	is_ready (SV *self)
		1300	PROTOTYPE: $
		1301	CODE:
		1302	RETVAL = boolSV (api_is_ready (self));
		1303	OUTPUT:
		1304	RETVAL
		1305
		1306	int
1090	nready(...)	1307	nready (...)
1091	PROTOTYPE:	1308	PROTOTYPE:
1092	CODE:	1309	CODE:
1093	RETVAL = coro_nready;	1310	RETVAL = coro_nready;
1094	OUTPUT:	1311	OUTPUT:
1095	RETVAL	1312	RETVAL
1096		1313
		1314	MODULE = Coro::State PACKAGE = Coro::AIO
		1315
		1316	SV *
		1317	_get_state ()
		1318	CODE:
		1319	{
		1320	struct io_state *data;
		1321
		1322	RETVAL = newSV (sizeof (struct io_state));
		1323	data = (struct io_state *)SvPVX (RETVAL);
		1324	SvCUR_set (RETVAL, sizeof (struct io_state));
		1325	SvPOK_only (RETVAL);
		1326
		1327	data->errorno = errno;
		1328	data->laststype = PL_laststype;
		1329	data->laststatval = PL_laststatval;
		1330	data->statcache = PL_statcache;
		1331	}
		1332	OUTPUT:
		1333	RETVAL
		1334
1097	void	1335	void
1098	schedule(...)	1336	_set_state (char *data_)
1099	PROTOTYPE:	1337	PROTOTYPE: $
1100	CODE:	1338	CODE:
1101	api_schedule ();	1339	{
		1340	struct io_state *data = (void *)data_;
1102		1341
1103	void	1342	errno = data->errorno;
1104	cede(...)	1343	PL_laststype = data->laststype;
1105	PROTOTYPE:	1344	PL_laststatval = data->laststatval;
1106	CODE:	1345	PL_statcache = data->statcache;
1107	api_cede ();	1346	}
1108		1347

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