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Comparing Coro/Coro/State.xs (file contents):
Revision 1.39 by root, Sun Nov 25 20:04:05 2001 UTC vs.
Revision 1.135 by root, Fri Jan 5 18:25:51 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
7	#include <signal.h>	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
8		12
9	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
10	# include <unistd.h>	14	# include <unistd.h>
11	# include <sys/mman.h>	15	# include <sys/mman.h>
12	# ifndef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS MAP_ANON	18	# define MAP_ANONYMOUS MAP_ANON
15	# else	19	# else
16	# undef HAVE_MMAP	20	# undef HAVE_MMAP
17	# endif	21	# endif
18	# endif	22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
19	#endif	30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
20		35
21	#define MAY_FLUSH /* increases codesize and is rarely used */	36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
22		39
23	#define SUB_INIT "Coro::State::initialize"	40	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
		50	# ifndef PL_ppaddr
		51	# define PL_ppaddr ppaddr
		52	# endif
		53	# ifndef call_sv
		54	# define call_sv perl_call_sv
		55	# endif
		56	# ifndef get_sv
		57	# define get_sv perl_get_sv
		58	# endif
		59	# ifndef get_cv
		60	# define get_cv perl_get_cv
		61	# endif
		62	# ifndef IS_PADGV
		63	# define IS_PADGV(v) 0
		64	# endif
		65	# ifndef IS_PADCONST
		66	# define IS_PADCONST(v) 0
		67	# endif
		68	#endif
		69
		70	/* 5.8.7 */
		71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
		74
		75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		76	# undef STACKGUARD
		77	#endif
		78
		79	#ifndef STACKGUARD
		80	# define STACKGUARD 0
		81	#endif
		82
		83	/* prefer perl internal functions over our own? */
		84	#ifndef PREFER_PERL_FUNCTIONS
		85	# define PREFER_PERL_FUNCTIONS 0
		86	#endif
25		87
26	/* 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
27	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
30		93
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		95
33	#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))
34		105
35	#include "CoroAPI.h"	106	#include "CoroAPI.h"
36		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
37	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 */
38		129
39	/* 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 */
40	typedef struct {	134	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	135	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		136
45	coro_context cctx;	137	/* the stack */
46
47	void *sptr;	138	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		140
		141	/* cpu state */
		142	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		143	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		144	JMPENV *top_env;
		145	coro_context cctx;
		146
		147	int inuse;
		148
		149	#if USE_VALGRIND
		150	int valgrind_id;
		151	#endif
		152	} coro_cctx;
		153
		154	enum {
		155	CF_RUNNING = 0x0001, /* coroutine is running */
		156	CF_READY = 0x0002, /* coroutine is ready */
		157	CF_NEW = 0x0004, /* has never been switched to */
		158	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		159	};
		160
		161	/* this is a structure representing a perl-level coroutine */
51	struct coro {	162	struct coro {
52	/* the optional C context */	163	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	164	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56
57	/* optionally saved, might be zero */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61	/* TODO: PL_pmop might be nice && effortless to save. */
62
63	/* saved global state not related to stacks */
64	U8 dowarn;
65	I32 in_eval;
66
67	/* the stacks and related info (callchain etc..) */
68	PERL_SI *curstackinfo;
69	AV *curstack;
70	AV *mainstack;
71	SV **stack_sp;
72	OP *op;
73	SV **curpad;
74	SV **stack_base;
75	SV **stack_max;
76	SV **tmps_stack;
77	I32 tmps_floor;
78	I32 tmps_ix;
79	I32 tmps_max;
80	I32 *markstack;
81	I32 *markstack_ptr;
82	I32 *markstack_max;
83	I32 *scopestack;
84	I32 scopestack_ix;
85	I32 scopestack_max;
86	ANY *savestack;
87	I32 savestack_ix;
88	I32 savestack_max;
89	OP **retstack;
90	I32 retstack_ix;
91	I32 retstack_max;
92	COP *curcop;
93	JMPENV *top_env;
94		165
95	/* data associated with this coroutine (initial args) */	166	/* data associated with this coroutine (initial args) */
96	AV *args;	167	AV *args;
		168	int refcnt;
		169	int save; /* CORO_SAVE flags */
		170	int flags; /* CF_ flags */
		171
		172	/* optionally saved, might be zero */
		173	AV *defav; /* @_ */
		174	SV *defsv; /* $_ */
		175	SV *errsv; /* $@ */
		176	SV *irssv; /* $/ */
		177	SV *irssv_sv; /* real $/ cache */
		178
		179	#define VAR(name,type) type name;
		180	# include "state.h"
		181	#undef VAR
		182
		183	/* coro process data */
		184	int prio;
97	};	185	};
98		186
99	typedef struct coro *Coro__State;	187	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	188	typedef struct coro *Coro__State_or_hashref;
101		189
102	static AV *main_mainstack; /* used to differentiate between $main and others */	190	static AV *
103	static HV *coro_state_stash;	191	coro_clone_padlist (CV *cv)
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107	static SV *coro_mortal; /* will be freed after next transfer */
108
109	/* mostly copied from op.c:cv_clone2 */
110	STATIC AV *
111	clone_padlist (AV *protopadlist)
112	{	192	{
113	AV *av;	193	AV *padlist = CvPADLIST (cv);
114	I32 ix;
115	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV *newpadlist, *newpad_name, *newpad;	194	AV *newpadlist, *newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131		195
132	newpadlist = newAV ();	196	newpadlist = newAV ();
133	AvREAL_off (newpadlist);	197	AvREAL_off (newpadlist);
134	av_store (newpadlist, 0, (SV *) newpad_name);	198	#if PERL_VERSION_ATLEAST (5,9,0)
		199	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		200	#else
		201	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		202	#endif
		203	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		204	--AvFILLp (padlist);
		205
		206	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
135	av_store (newpadlist, 1, (SV *) newpad);	207	av_store (newpadlist, 1, (SV *)newpad);
136		208
137	av = newAV (); /* will be @_ */	209	return newpadlist;
138	av_extend (av, 0);	210	}
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141		211
142	for (ix = fpad; ix > 0; ix--)	212	static void
		213	free_padlist (AV *padlist)
		214	{
		215	/* may be during global destruction */
		216	if (SvREFCNT (padlist))
143	{	217	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	218	I32 i = AvFILLp (padlist);
145	if (namesv && namesv != &PL_sv_undef)	219	while (i >= 0)
146	{	220	{
147	char *name = SvPVX (namesv); /* XXX */	221	SV **svp = av_fetch (padlist, i--, FALSE);
148	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	222	if (svp)
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}	223	{
152	else
153	{ /* our own lexical */
154	SV *sv;	224	SV *sv;
155	if (*name == '&')	225	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156	sv = SvREFCNT_inc (ppad[ix]);	226	SvREFCNT_dec (sv);
157	else if (*name == '@')	227
158	sv = (SV *) newAV ();	228	SvREFCNT_dec (*svp);
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}	229	}
167	}	230	}
168	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169	{
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}
179		231
180	#if 0 /* return -ENOTUNDERSTOOD */
181	/* Now that vars are all in place, clone nested closures. */
182
183	for (ix = fpad; ix > 0; ix--) {
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185	if (namesv
186	&& namesv != &PL_sv_undef
187	&& !(SvFLAGS(namesv) & SVf_FAKE)
188	&& *SvPVX(namesv) == '&'
189	&& CvCLONE(ppad[ix]))
190	{
191	CV *kid = cv_clone((CV*)ppad[ix]);
192	SvREFCNT_dec(ppad[ix]);
193	CvCLONE_on(kid);
194	SvPADMY_on(kid);
195	npad[ix] = (SV*)kid;
196	}
197	}
198	#endif
199
200	return newpadlist;
201	}
202
203	#ifdef MAY_FLUSH
204	STATIC void
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV *sv = svp ? *svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218
219	SvREFCNT_dec((SV*)padlist);	232	SvREFCNT_dec ((SV*)padlist);
220	}	233	}
221	}	234	}
222	#endif	235
		236	static int
		237	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		238	{
		239	AV *padlist;
		240	AV *av = (AV *)mg->mg_obj;
		241
		242	/* casting is fun. */
		243	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		244	free_padlist (padlist);
		245
		246	SvREFCNT_dec (av);
		247
		248	return 0;
		249	}
		250
		251	#define PERL_MAGIC_coro PERL_MAGIC_ext
		252
		253	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		254
		255	#define CORO_MAGIC(cv) \
		256	SvMAGIC (cv) \
		257	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		258	? SvMAGIC (cv) \
		259	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		260	: 0
223		261
224	/* the next two functions merely cache the padlists */	262	/* the next two functions merely cache the padlists */
225	STATIC void	263	static void
226	get_padlist (CV *cv)	264	get_padlist (CV *cv)
227	{	265	{
228	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	266	MAGIC *mg = CORO_MAGIC (cv);
		267	AV *av;
229		268
230	if (he && AvFILLp ((AV *)*he) >= 0)	269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
231	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232	else	271	else
		272	{
		273	#if PREFER_PERL_FUNCTIONS
		274	/* this is probably cleaner, but also slower? */
		275	CV *cp = Perl_cv_clone (cv);
		276	CvPADLIST (cv) = CvPADLIST (cp);
		277	CvPADLIST (cp) = 0;
		278	SvREFCNT_dec (cp);
		279	#else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	280	CvPADLIST (cv) = coro_clone_padlist (cv);
		281	#endif
		282	}
234	}	283	}
235		284
236	STATIC void	285	static void
237	put_padlist (CV *cv)	286	put_padlist (CV *cv)
238	{	287	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
240		290
241	if (SvTYPE (*he) != SVt_PVAV)	291	if (!mg)
242	{
243	SvREFCNT_dec (*he);
244	*he = (SV *)newAV ();
245	}	292	{
246		293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
247	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
248	}	295	mg->mg_virtual = &vtbl_coro;
249		296	mg->mg_obj = (SV *)newAV ();
250	#ifdef MAY_FLUSH
251	STATIC void
252	flush_padlist_cache ()
253	{
254	HV *hv = padlist_cache;
255	padlist_cache = newHV ();
256
257	if (hv_iterinit (hv))
258	{	297	}
259	HE *he;
260	AV *padlist;
261		298
262	while (!!(he = hv_iternext (hv)))	299	av = (AV *)mg->mg_obj;
263	{
264	AV *av = (AV *)HeVAL(he);
265		300
266	/* casting is fun. */	301	if (AvFILLp (av) >= AvMAX (av))
267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	302	av_extend (av, AvMAX (av) + 1);
268	free_padlist (padlist);
269	}
270	}
271		303
272	SvREFCNT_dec (hv);	304	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
273	}	305	}
274	#endif
275		306
276	#define SB do {	307	#define SB do {
277	#define SE } while (0)	308	#define SE } while (0)
278		309
279	#define LOAD(state) load_state(aTHX_ (state));
280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
283		311
284	static void	312	static void
285	load_state(pTHX_ Coro__State c)	313	load_perl (Coro__State c)
286	{	314	{
287	PL_dowarn = c->dowarn;	315	#define VAR(name,type) PL_ ## name = c->name;
288	PL_in_eval = c->in_eval;	316	# include "state.h"
289		317	#undef VAR
290	PL_curstackinfo = c->curstackinfo;
291	PL_curstack = c->curstack;
292	PL_mainstack = c->mainstack;
293	PL_stack_sp = c->stack_sp;
294	PL_op = c->op;
295	PL_curpad = c->curpad;
296	PL_stack_base = c->stack_base;
297	PL_stack_max = c->stack_max;
298	PL_tmps_stack = c->tmps_stack;
299	PL_tmps_floor = c->tmps_floor;
300	PL_tmps_ix = c->tmps_ix;
301	PL_tmps_max = c->tmps_max;
302	PL_markstack = c->markstack;
303	PL_markstack_ptr = c->markstack_ptr;
304	PL_markstack_max = c->markstack_max;
305	PL_scopestack = c->scopestack;
306	PL_scopestack_ix = c->scopestack_ix;
307	PL_scopestack_max = c->scopestack_max;
308	PL_savestack = c->savestack;
309	PL_savestack_ix = c->savestack_ix;
310	PL_savestack_max = c->savestack_max;
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	PL_curcop = c->curcop;
315	PL_top_env = c->top_env;
316		318
317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	319	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	320	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	321	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		322	if (c->irssv)
		323	{
		324	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		325	SvREFCNT_dec (c->irssv);
		326	else
		327	{
		328	REPLACE_SV (PL_rs, c->irssv);
		329	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		330	sv_setsv (c->irssv_sv, PL_rs);
		331	}
		332	}
320		333
321	{	334	{
322	dSP;	335	dSP;
323	CV *cv;	336	CV *cv;
324		337
325	/* now do the ugly restore mess */	338	/* now do the ugly restore mess */
326	while ((cv = (CV *)POPs))	339	while ((cv = (CV *)POPs))
327	{	340	{
328	AV *padlist = (AV *)POPs;
329
330	if (padlist)
331	{
332	put_padlist (cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
333	CvPADLIST(cv) = padlist;	342	CvDEPTH (cv) = PTR2IV (POPs);
334	#ifdef USE_THREADS	343	CvPADLIST (cv) = (AV *)POPs;
335	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336	#endif
337	}
338
339	++CvDEPTH(cv);
340	}	344	}
341		345
342	PUTBACK;	346	PUTBACK;
343	}	347	}
344	}	348	}
345		349
346	static void	350	static void
347	save_state(pTHX_ Coro__State c, int flags)	351	save_perl (Coro__State c)
348	{	352	{
349	{	353	{
350	dSP;	354	dSP;
351	I32 cxix = cxstack_ix;	355	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	356	PERL_CONTEXT *ccstk = cxstack;
…		…
355	/*	359	/*
356	* the worst thing you can imagine happens first - we have to save	360	* the worst thing you can imagine happens first - we have to save
357	* (and reinitialize) all cv's in the whole callchain :(	361	* (and reinitialize) all cv's in the whole callchain :(
358	*/	362	*/
359		363
		364	EXTEND (SP, 3 + 1);
360	PUSHs (Nullsv);	365	PUSHs (Nullsv);
361	/* this loop was inspired by pp_caller */	366	/* this loop was inspired by pp_caller */
362	for (;;)	367	for (;;)
363	{	368	{
364	while (cxix >= 0)	369	while (cxix >= 0)
365	{	370	{
366	PERL_CONTEXT *cx = &ccstk[cxix--];	371	PERL_CONTEXT *cx = &ccstk[cxix--];
367		372
368	if (CxTYPE(cx) == CXt_SUB)	373	if (CxTYPE (cx) == CXt_SUB)
369	{	374	{
370	CV *cv = cx->blk_sub.cv;	375	CV *cv = cx->blk_sub.cv;
		376
371	if (CvDEPTH(cv))	377	if (CvDEPTH (cv))
372	{	378	{
373	#ifdef USE_THREADS
374	/*XPUSHs ((SV *)CvOWNER(cv));*/
375	/*CvOWNER(cv) = 0;*/
376	/*error must unlock this cv etc.. etc...*/
377	#endif
378	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, 3);
379
380	while (--CvDEPTH(cv))
381	{
382	/* this tells the restore code to increment CvDEPTH */
383	PUSHs (Nullsv);
384	PUSHs ((SV *)cv);
385	}
386
387	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST (cv));
		381	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
388	PUSHs ((SV *)cv);	382	PUSHs ((SV *)cv);
389		383
		384	CvDEPTH (cv) = 0;
390	get_padlist (cv); /* this is a monster */	385	get_padlist (cv);
391	}	386	}
392	}
393	else if (CxTYPE(cx) == CXt_FORMAT)
394	{
395	/* I never used formats, so how should I know how these are implemented? */
396	/* my bold guess is as a simple, plain sub... */
397	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398	}	387	}
399	}	388	}
400		389
401	if (top_si->si_type == PERLSI_MAIN)	390	if (top_si->si_type == PERLSI_MAIN)
402	break;	391	break;
…		…
407	}	396	}
408		397
409	PUTBACK;	398	PUTBACK;
410	}	399	}
411		400
412	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	401	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
413	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	402	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
414	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	403	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		404	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
415		405
416	c->dowarn = PL_dowarn;	406	#define VAR(name,type)c->name = PL_ ## name;
417	c->in_eval = PL_in_eval;	407	# include "state.h"
418		408	#undef VAR
419	c->curstackinfo = PL_curstackinfo;
420	c->curstack = PL_curstack;
421	c->mainstack = PL_mainstack;
422	c->stack_sp = PL_stack_sp;
423	c->op = PL_op;
424	c->curpad = PL_curpad;
425	c->stack_base = PL_stack_base;
426	c->stack_max = PL_stack_max;
427	c->tmps_stack = PL_tmps_stack;
428	c->tmps_floor = PL_tmps_floor;
429	c->tmps_ix = PL_tmps_ix;
430	c->tmps_max = PL_tmps_max;
431	c->markstack = PL_markstack;
432	c->markstack_ptr = PL_markstack_ptr;
433	c->markstack_max = PL_markstack_max;
434	c->scopestack = PL_scopestack;
435	c->scopestack_ix = PL_scopestack_ix;
436	c->scopestack_max = PL_scopestack_max;
437	c->savestack = PL_savestack;
438	c->savestack_ix = PL_savestack_ix;
439	c->savestack_max = PL_savestack_max;
440	c->retstack = PL_retstack;
441	c->retstack_ix = PL_retstack_ix;
442	c->retstack_max = PL_retstack_max;
443	c->curcop = PL_curcop;
444	c->top_env = PL_top_env;
445	}	409	}
446		410
447	/*	411	/*
448	* allocate various perl stacks. This is an exact copy	412	* allocate various perl stacks. This is an exact copy
449	* of perl.c:init_stacks, except that it uses less memory	413	* of perl.c:init_stacks, except that it uses less memory
450	* on the assumption that coroutines do not usually need	414	* on the (sometimes correct) assumption that coroutines do
451	* a lot of stackspace.	415	* not usually need a lot of stackspace.
452	*/	416	*/
453	STATIC void	417	#if PREFER_PERL_FUNCTIONS
		418	# define coro_init_stacks init_stacks
		419	#else
		420	static void
454	coro_init_stacks (pTHX)	421	coro_init_stacks ()
455	{	422	{
456	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
457	PL_curstackinfo->si_type = PERLSI_MAIN;	424	PL_curstackinfo->si_type = PERLSI_MAIN;
458	PL_curstack = PL_curstackinfo->si_stack;	425	PL_curstack = PL_curstackinfo->si_stack;
459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460		427
461	PL_stack_base = AvARRAY(PL_curstack);	428	PL_stack_base = AvARRAY(PL_curstack);
462	PL_stack_sp = PL_stack_base;	429	PL_stack_sp = PL_stack_base;
463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464		431
465	New(50,PL_tmps_stack,96,SV*);	432	New(50,PL_tmps_stack,128,SV*);
466	PL_tmps_floor = -1;	433	PL_tmps_floor = -1;
467	PL_tmps_ix = -1;	434	PL_tmps_ix = -1;
468	PL_tmps_max = 96;	435	PL_tmps_max = 128;
469		436
470	New(54,PL_markstack,16,I32);	437	New(54,PL_markstack,32,I32);
471	PL_markstack_ptr = PL_markstack;	438	PL_markstack_ptr = PL_markstack;
472	PL_markstack_max = PL_markstack + 16;	439	PL_markstack_max = PL_markstack + 32;
473		440
		441	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	442	SET_MARK_OFFSET;
		443	#endif
475		444
476	New(54,PL_scopestack,16,I32);	445	New(54,PL_scopestack,32,I32);
477	PL_scopestack_ix = 0;	446	PL_scopestack_ix = 0;
478	PL_scopestack_max = 16;	447	PL_scopestack_max = 32;
479		448
480	New(54,PL_savestack,96,ANY);	449	New(54,PL_savestack,64,ANY);
481	PL_savestack_ix = 0;	450	PL_savestack_ix = 0;
482	PL_savestack_max = 96;	451	PL_savestack_max = 64;
483		452
		453	#if !PERL_VERSION_ATLEAST (5,9,0)
484	New(54,PL_retstack,8,OP*);	454	New(54,PL_retstack,16,OP*);
485	PL_retstack_ix = 0;	455	PL_retstack_ix = 0;
486	PL_retstack_max = 8;	456	PL_retstack_max = 16;
		457	#endif
487	}	458	}
		459	#endif
488		460
489	/*	461	/*
490	* destroy the stacks, the callchain etc...	462	* destroy the stacks, the callchain etc...
491	* still there is a memleak of 128 bytes...
492	*/	463	*/
493	STATIC void	464	static void
494	destroy_stacks(pTHX)	465	coro_destroy_stacks ()
495	{	466	{
496	if (!IN_DESTRUCT)	467	if (!IN_DESTRUCT)
497	{	468	{
498	/* is this ugly, I ask? */	469	/* restore all saved variables and stuff */
499	while (PL_scopestack_ix)	470	LEAVE_SCOPE (0);
500	LEAVE;	471	assert (PL_tmps_floor == -1);
501		472
502	/* sure it is, but more important: is it correct?? :/ */	473	/* free all temporaries */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;	474	FREETMPS;
		475	assert (PL_tmps_ix == -1);
		476
		477	/* unwind all extra stacks */
		478	POPSTACK_TO (PL_mainstack);
		479
		480	/* unwind main stack */
		481	dounwind (-1);
505	}	482	}
506		483
507	while (PL_curstackinfo->si_next)	484	while (PL_curstackinfo->si_next)
508	PL_curstackinfo = PL_curstackinfo->si_next;	485	PL_curstackinfo = PL_curstackinfo->si_next;
509		486
510	while (PL_curstackinfo)	487	while (PL_curstackinfo)
511	{	488	{
512	PERL_SI *p = PL_curstackinfo->si_prev;	489	PERL_SI *p = PL_curstackinfo->si_prev;
513		490
514	{
515	dSP;
516	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
517	PUTBACK; /* possibly superfluous */
518	}
519
520	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
521	{
522	dounwind(-1);
523	SvREFCNT_dec(PL_curstackinfo->si_stack);	492	SvREFCNT_dec (PL_curstackinfo->si_stack);
524	}
525		493
526	Safefree(PL_curstackinfo->si_cxstack);	494	Safefree (PL_curstackinfo->si_cxstack);
527	Safefree(PL_curstackinfo);	495	Safefree (PL_curstackinfo);
528	PL_curstackinfo = p;	496	PL_curstackinfo = p;
529	}	497	}
530		498
531	Safefree(PL_tmps_stack);	499	Safefree (PL_tmps_stack);
532	Safefree(PL_markstack);	500	Safefree (PL_markstack);
533	Safefree(PL_scopestack);	501	Safefree (PL_scopestack);
534	Safefree(PL_savestack);	502	Safefree (PL_savestack);
		503	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree(PL_retstack);	504	Safefree (PL_retstack);
536	}
537
538	static void
539	allocate_stack (Coro__State ctx, int alloc)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548	if (alloc)
549	{
550	#if HAVE_MMAP
551	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
553	if (stack->sptr == (void *)-1)
554	#endif	505	#endif
555	{
556	/*FIXME*//*D*//* reasonable stack size! */
557	stack->ssize = -4096 * sizeof (long);
558	New (0, stack->sptr, 4096, long);
559	}
560	}
561	else
562	stack->sptr = 0;
563
564	ctx->stack = stack;
565	}	506	}
566		507
567	static void	508	static void
568	deallocate_stack (Coro__State ctx)	509	setup_coro (struct coro *coro)
569	{
570	coro_stack *stack = ctx->stack;
571
572	ctx->stack = 0;
573
574	if (stack)
575	{
576	if (!--stack->refcnt)
577	{
578	#ifdef HAVE_MMAP
579	if (stack->ssize > 0 && stack->sptr)
580	munmap (stack->sptr, stack->ssize);
581	else
582	#else
583	Safefree (stack->sptr);
584	#endif
585	Safefree (stack);
586	}
587	else if (ctx->gencnt == stack->gencnt)
588	--stack->usecnt;
589	}
590	}
591
592	static void
593	setup_coro (void *arg)
594	{	510	{
595	/*	511	/*
596	* emulate part of the perl startup here.	512	* emulate part of the perl startup here.
597	*/	513	*/
		514
		515	coro_init_stacks ();
		516
		517	PL_curcop = &PL_compiling;
		518	PL_in_eval = EVAL_NULL;
		519	PL_curpm = 0;
		520	PL_localizing = 0;
		521	PL_dirty = 0;
		522	PL_restartop = 0;
		523
		524	{
		525	dSP;
		526	LOGOP myop;
		527
		528	SvREFCNT_dec (GvAV (PL_defgv));
		529	GvAV (PL_defgv) = coro->args; coro->args = 0;
		530
		531	Zero (&myop, 1, LOGOP);
		532	myop.op_next = Nullop;
		533	myop.op_flags = OPf_WANT_VOID;
		534
		535	PUSHMARK (SP);
		536	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		537	PUTBACK;
		538	PL_op = (OP *)&myop;
		539	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		540	SPAGAIN;
		541	}
		542
		543	ENTER; /* necessary e.g. for dounwind */
		544	}
		545
		546	static void
		547	free_coro_mortal ()
		548	{
		549	if (coro_mortal)
		550	{
		551	SvREFCNT_dec (coro_mortal);
		552	coro_mortal = 0;
		553	}
		554	}
		555
		556	/* inject a fake call to Coro::State::_cctx_init into the execution */
		557	static void NOINLINE
		558	prepare_cctx (coro_cctx *cctx)
		559	{
598	dSP;	560	dSP;
599	Coro__State ctx = (Coro__State)arg;	561	LOGOP myop;
600	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601		562
602	coro_init_stacks (aTHX);	563	Zero (&myop, 1, LOGOP);
603	/*PL_curcop = 0;*/	564	myop.op_next = PL_op;
604	/*PL_in_eval = PL_in_eval;*/ /* inherit */	565	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
605	SvREFCNT_dec (GvAV (PL_defgv));
606	GvAV (PL_defgv) = ctx->args;
607		566
		567	PUSHMARK (SP);
		568	EXTEND (SP, 2);
		569	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		570	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		571	PUTBACK;
		572	PL_op = (OP *)&myop;
		573	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
608	SPAGAIN;	574	SPAGAIN;
609
610	if (ctx->stack)
611	{
612	ctx->cursp = 0;
613
614	PUSHMARK(SP);
615	PUTBACK;
616	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
617
618	if (SvTRUE (ERRSV))
619	croak (NULL);
620	else
621	croak ("FATAL: CCTXT coroutine returned!");
622	}
623	else
624	{
625	UNOP myop;
626
627	PL_op = (OP *)&myop;
628
629	Zero(&myop, 1, UNOP);
630	myop.op_next = Nullop;
631	myop.op_flags = OPf_WANT_VOID;
632
633	PUSHMARK(SP);
634	XPUSHs (sub_init);
635	/*
636	* the next line is slightly wrong, as PL_op->op_next
637	* is actually being executed so we skip the first op.
638	* that doesn't matter, though, since it is only
639	* pp_nextstate and we never return...
640	* ah yes, and I don't care anyways ;)
641	*/
642	PUTBACK;
643	PL_op = pp_entersub();
644	SPAGAIN;
645
646	ENTER; /* necessary e.g. for dounwind */
647	}
648	}	575	}
649		576
650	static void	577	static void
651	continue_coro (void *arg)	578	coro_run (void *arg)
652	{	579	{
		580	/* coro_run is the alternative tail of transfer(), so unlock here. */
		581	UNLOCK;
		582
653	/*	583	/*
654	* this is a _very_ stripped down perl interpreter ;)	584	* this is a _very_ stripped down perl interpreter ;)
655	*/	585	*/
656	Coro__State ctx = (Coro__State)arg;
657	JMPENV coro_start_env;
658
659	/* same as JMPENV_BOOTSTRAP */
660	Zero(&coro_start_env, 1, JMPENV);
661	coro_start_env.je_ret = -1;
662	coro_start_env.je_mustcatch = TRUE;
663	PL_top_env = &coro_start_env;	586	PL_top_env = &PL_start_env;
664		587
665	ctx->cursp = 0;	588	/* inject call to cctx_init */
666	PL_op = PL_op->op_next;	589	prepare_cctx ((coro_cctx *)arg);
667	CALLRUNOPS(aTHX);
668		590
		591	/* somebody will hit me for both perl_run and PL_restartop */
		592	PL_restartop = PL_op;
		593	perl_run (PL_curinterp);
		594
		595	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
669	abort ();	596	abort ();
670	}	597	}
671		598
672	STATIC void	599	static coro_cctx *
		600	cctx_new ()
		601	{
		602	coro_cctx *cctx;
		603
		604	++cctx_count;
		605
		606	Newz (0, cctx, 1, coro_cctx);
		607
		608	#if HAVE_MMAP
		609
		610	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		611	/* mmap supposedly does allocate-on-write for us */
		612	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		613
		614	if (cctx->sptr == (void *)-1)
		615	{
		616	perror ("FATAL: unable to mmap stack for coroutine");
		617	_exit (EXIT_FAILURE);
		618	}
		619
		620	# if STACKGUARD
		621	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		622	# endif
		623
		624	#else
		625
		626	cctx->ssize = STACKSIZE * (long)sizeof (long);
		627	New (0, cctx->sptr, STACKSIZE, long);
		628
		629	if (!cctx->sptr)
		630	{
		631	perror ("FATAL: unable to malloc stack for coroutine");
		632	_exit (EXIT_FAILURE);
		633	}
		634
		635	#endif
		636
		637	#if USE_VALGRIND
		638	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		639	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		640	cctx->ssize + (char *)cctx->sptr
		641	);
		642	#endif
		643
		644	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		645
		646	return cctx;
		647	}
		648
		649	static void
		650	cctx_destroy (coro_cctx *cctx)
		651	{
		652	if (!cctx)
		653	return;
		654
		655	--cctx_count;
		656
		657	#if USE_VALGRIND
		658	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		659	#endif
		660
		661	#if HAVE_MMAP
		662	munmap (cctx->sptr, cctx->ssize);
		663	#else
		664	Safefree (cctx->sptr);
		665	#endif
		666
		667	Safefree (cctx);
		668	}
		669
		670	static coro_cctx *
		671	cctx_get ()
		672	{
		673	coro_cctx *cctx;
		674
		675	if (cctx_first)
		676	{
		677	cctx = cctx_first;
		678	cctx_first = cctx->next;
		679	--cctx_idle;
		680	}
		681	else
		682	{
		683	cctx = cctx_new ();
		684	PL_op = PL_op->op_next;
		685	}
		686
		687	return cctx;
		688	}
		689
		690	static void
		691	cctx_put (coro_cctx *cctx)
		692	{
		693	/* free another cctx if overlimit */
		694	if (cctx_idle >= MAX_IDLE_CCTX)
		695	{
		696	coro_cctx *first = cctx_first;
		697	cctx_first = first->next;
		698	--cctx_idle;
		699
		700	assert (!first->inuse);
		701	cctx_destroy (first);
		702	}
		703
		704	++cctx_idle;
		705	cctx->next = cctx_first;
		706	cctx_first = cctx;
		707	}
		708
		709	/* never call directly, always through the coro_state_transfer global variable */
		710	static void NOINLINE
673	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	711	transfer (struct coro *prev, struct coro *next)
674	{	712	{
675	dSTACKLEVEL;	713	dSTACKLEVEL;
676	static struct coro *xnext;
677		714
		715	/* sometimes transfer is only called to set idle_sp */
		716	if (!next)
		717	{
		718	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		719	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		720	}
678	if (prev != next)	721	else if (prev != next)
679	{	722	{
680	xnext = next;	723	coro_cctx *prev__cctx;
681		724
682	if (next->mainstack)	725	if (prev->flags & CF_NEW)
683	{	726	{
684	SAVE (prev, flags);	727	/* create a new empty context */
685	LOAD (next);	728	Newz (0, prev->cctx, 1, coro_cctx);
686		729	prev->cctx->inuse = 1;
687	/* mark this state as in-use */	730	prev->flags &= ~CF_NEW;
688	next->mainstack = 0;	731	prev->flags |= CF_RUNNING;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	/* don't add any code here */
715	}
716
717	}	732	}
718	else if (next->tmps_ix == -2)	733
719	croak ("tried to transfer to running coroutine");	734	/*TODO: must not croak here */
		735	if (!prev->flags & CF_RUNNING)
		736	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		737
		738	if (next->flags & CF_RUNNING)
		739	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		740
		741	if (next->flags & CF_DESTROYED)
		742	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		743
		744	prev->flags &= ~CF_RUNNING;
		745	next->flags |= CF_RUNNING;
		746
		747	LOCK;
		748
		749	if (next->flags & CF_NEW)
		750	{
		751	/* need to start coroutine */
		752	next->flags &= ~CF_NEW;
		753	/* first get rid of the old state */
		754	save_perl (prev);
		755	/* setup coroutine call */
		756	setup_coro (next);
		757	/* need a new stack */
		758	assert (!next->cctx);
		759	}
720	else	760	else
721	{	761	{
722	SAVE (prev, -1); /* first get rid of the old state */	762	/* coroutine already started */
723		763	save_perl (prev);
724	if (flags & TRANSFER_SAVE_CCTXT)	764	load_perl (next);
725	{
726	if (!prev->stack)
727	allocate_stack (prev, 0);
728
729	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
730	{
731	setup_coro (next);
732
733	prev->stack->refcnt++;
734	prev->stack->usecnt++;
735	next->stack = prev->stack;
736	next->gencnt = prev->gencnt;
737	}
738	else
739	{
740	allocate_stack (next, 1);
741	coro_create (&(next->stack->cctx),
742	setup_coro, (void *)next,
743	next->stack->sptr, labs (next->stack->ssize));
744	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
745	/* don't add any code here */
746	}
747	}
748	else
749	setup_coro (next);
750	}	765	}
751		766
752	/*	767	prev__cctx = prev->cctx;
753	* xnext is now either prev or next, depending on wether	768
754	* we switched the c stack or not. that's why i use a global	769	/* possibly "free" the cctx */
755	* variable, that should become thread-specific at one point.	770	if (prev__cctx->idle_sp == STACKLEVEL)
756	*/	771	{
757	xnext->cursp = stacklevel;	772	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
758	}	773	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
759		774
760	if (coro_mortal)	775	prev->cctx = 0;
		776
		777	cctx_put (prev__cctx);
		778	prev__cctx->inuse = 0;
		779	}
		780
		781	if (!next->cctx)
		782	{
		783	next->cctx = cctx_get ();
		784	assert (!next->cctx->inuse);
		785	next->cctx->inuse = 1;
		786	}
		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
		795	free_coro_mortal ();
		796	UNLOCK;
761	{	797	}
762	SvREFCNT_dec (coro_mortal);	798	}
763	coro_mortal = 0;	799
		800	struct transfer_args
		801	{
		802	struct coro *prev, *next;
		803	};
		804
		805	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		806
		807	static int
		808	coro_state_destroy (struct coro *coro)
		809	{
		810	if (coro->flags & CF_DESTROYED)
		811	return 0;
		812
		813	coro->flags |= CF_DESTROYED;
		814
		815	if (coro->mainstack && coro->mainstack != main_mainstack)
764	}	816	{
765	}	817	assert (!(coro->flags & CF_RUNNING));
766		818
767	#define SV_CORO(sv,func) \	819	struct coro temp;
768	do { \	820	Zero (&temp, 1, struct coro);
769	if (SvROK (sv)) \	821	temp.save = CORO_SAVE_ALL;
770	sv = SvRV (sv); \
771	\
772	if (SvTYPE(sv) == SVt_PVHV) \
773	{ \
774	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
775	\
776	if (!he) \
777	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
778	\
779	(sv) = SvRV (HeVAL(he)); \
780	} \
781	\
782	/* must also be changed inside Coro::Cont::yield */ \
783	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
784	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
785	\
786	} while(0)
787		822
788	#define SvSTATE(sv) (struct coro *)SvIV (sv)	823	if (coro->flags & CF_RUNNING)
		824	croak ("FATAL: tried to destroy currently running coroutine");
789		825
		826	save_perl (&temp);
		827	load_perl (coro);
		828
		829	coro_destroy_stacks ();
		830
		831	load_perl (&temp); /* this will get rid of defsv etc.. */
		832
		833	coro->mainstack = 0;
		834	}
		835
		836	cctx_destroy (coro->cctx);
		837	SvREFCNT_dec (coro->args);
		838
		839	return 1;
		840	}
		841
790	static void	842	static int
		843	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		844	{
		845	struct coro *coro = (struct coro *)mg->mg_ptr;
		846	mg->mg_ptr = 0;
		847
		848	if (--coro->refcnt < 0)
		849	{
		850	coro_state_destroy (coro);
		851	Safefree (coro);
		852	}
		853
		854	return 0;
		855	}
		856
		857	static int
		858	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		859	{
		860	struct coro *coro = (struct coro *)mg->mg_ptr;
		861
		862	++coro->refcnt;
		863
		864	return 0;
		865	}
		866
		867	static MGVTBL coro_state_vtbl = {
		868	0, 0, 0, 0,
		869	coro_state_free,
		870	0,
		871	#ifdef MGf_DUP
		872	coro_state_dup,
		873	#else
		874	# define MGf_DUP 0
		875	#endif
		876	};
		877
		878	static struct coro *
		879	SvSTATE (SV *coro)
		880	{
		881	HV *stash;
		882	MAGIC *mg;
		883
		884	if (SvROK (coro))
		885	coro = SvRV (coro);
		886
		887	stash = SvSTASH (coro);
		888	if (stash != coro_stash && stash != coro_state_stash)
		889	{
		890	/* very slow, but rare, check */
		891	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		892	croak ("Coro::State object required");
		893	}
		894
		895	mg = SvMAGIC (coro);
		896	assert (mg->mg_type == PERL_MAGIC_ext);
		897	return (struct coro *)mg->mg_ptr;
		898	}
		899
		900	static void
		901	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		902	{
		903	ta->prev = SvSTATE (prev_sv);
		904	ta->next = SvSTATE (next_sv);
		905	}
		906
		907	static void
791	api_transfer(pTHX_ SV *prev, SV *next, int flags)	908	api_transfer (SV *prev_sv, SV *next_sv)
792	{	909	{
793	SV_CORO (prev, "Coro::transfer");	910	struct transfer_args ta;
794	SV_CORO (next, "Coro::transfer");
795		911
796	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	912	prepare_transfer (&ta, prev_sv, next_sv);
		913	TRANSFER (ta);
		914	}
		915
		916	static int
		917	api_save (SV *coro_sv, int new_save)
		918	{
		919	struct coro *coro = SvSTATE (coro_sv);
		920	int old_save = coro->save;
		921
		922	if (new_save >= 0)
		923	coro->save = new_save;
		924
		925	return old_save;
797	}	926	}
798		927
799	/** Coro ********************************************************************/	928	/** Coro ********************************************************************/
800		929
801	#define PRIO_MAX 3	930	#define PRIO_MAX 3
…		…
804	#define PRIO_LOW -1	933	#define PRIO_LOW -1
805	#define PRIO_IDLE -3	934	#define PRIO_IDLE -3
806	#define PRIO_MIN -4	935	#define PRIO_MIN -4
807		936
808	/* for Coro.pm */	937	/* for Coro.pm */
809	static GV *coro_current, *coro_idle;	938	static SV *coro_current;
810	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	939	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
811	static int coro_nready;	940	static int coro_nready;
812		941
813	static void	942	static void
814	coro_enq (SV *sv)	943	coro_enq (SV *coro_sv)
815	{	944	{
816	if (SvTYPE (sv) == SVt_PVHV)
817	{
818	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
819	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
820
821	prio = prio > PRIO_MAX ? PRIO_MAX
822	: prio < PRIO_MIN ? PRIO_MIN
823	: prio;
824
825	av_push (coro_ready [prio - PRIO_MIN], sv);	945	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
826	coro_nready++;	946	coro_nready++;
827
828	return;
829	}
830
831	croak ("Coro::ready tried to enqueue something that is not a coroutine");
832	}	947	}
833		948
834	static SV *	949	static SV *
835	coro_deq (int min_prio)	950	coro_deq (int min_prio)
836	{	951	{
…		…
839	min_prio -= PRIO_MIN;	954	min_prio -= PRIO_MIN;
840	if (min_prio < 0)	955	if (min_prio < 0)
841	min_prio = 0;	956	min_prio = 0;
842		957
843	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	958	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
844	if (av_len (coro_ready[prio]) >= 0)	959	if (AvFILLp (coro_ready [prio]) >= 0)
845	{	960	{
846	coro_nready--;	961	coro_nready--;
847	return av_shift (coro_ready[prio]);	962	return av_shift (coro_ready [prio]);
848	}	963	}
849		964
850	return 0;	965	return 0;
851	}	966	}
852		967
853	static void	968	static int
854	api_ready (SV *coro)	969	api_ready (SV *coro_sv)
855	{	970	{
		971	struct coro *coro;
		972
856	if (SvROK (coro))	973	if (SvROK (coro_sv))
857	coro = SvRV (coro);	974	coro_sv = SvRV (coro_sv);
858		975
		976	coro = SvSTATE (coro_sv);
		977
		978	if (coro->flags & CF_READY)
		979	return 0;
		980
		981	coro->flags |= CF_READY;
		982
		983	LOCK;
859	coro_enq (SvREFCNT_inc (coro));	984	coro_enq (SvREFCNT_inc (coro_sv));
		985	UNLOCK;
		986
		987	return 1;
		988	}
		989
		990	static int
		991	api_is_ready (SV *coro_sv)
		992	{
		993	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		994	}
		995
		996	static void
		997	prepare_schedule (struct transfer_args *ta)
		998	{
		999	SV *prev_sv, *next_sv;
		1000
		1001	for (;;)
		1002	{
		1003	LOCK;
		1004	next_sv = coro_deq (PRIO_MIN);
		1005	UNLOCK;
		1006
		1007	/* nothing to schedule: call the idle handler */
		1008	if (!next_sv)
		1009	{
		1010	dSP;
		1011
		1012	ENTER;
		1013	SAVETMPS;
		1014
		1015	PUSHMARK (SP);
		1016	PUTBACK;
		1017	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1018
		1019	FREETMPS;
		1020	LEAVE;
		1021	continue;
		1022	}
		1023
		1024	ta->next = SvSTATE (next_sv);
		1025
		1026	/* cannot transfer to destroyed coros, skip and look for next */
		1027	if (ta->next->flags & CF_DESTROYED)
		1028	{
		1029	SvREFCNT_dec (next_sv);
		1030	continue;
		1031	}
		1032
		1033	break;
		1034	}
		1035
		1036	/* free this only after the transfer */
		1037	prev_sv = SvRV (coro_current);
		1038	SvRV_set (coro_current, next_sv);
		1039	ta->prev = SvSTATE (prev_sv);
		1040
		1041	assert (ta->next->flags & CF_READY);
		1042	ta->next->flags &= ~CF_READY;
		1043
		1044	LOCK;
		1045	free_coro_mortal ();
		1046	coro_mortal = prev_sv;
		1047	UNLOCK;
		1048	}
		1049
		1050	static void
		1051	prepare_cede (struct transfer_args *ta)
		1052	{
		1053	api_ready (coro_current);
		1054	prepare_schedule (ta);
		1055	}
		1056
		1057	static int
		1058	prepare_cede_notself (struct transfer_args *ta)
		1059	{
		1060	if (coro_nready)
		1061	{
		1062	SV *prev = SvRV (coro_current);
		1063	prepare_schedule (ta);
		1064	api_ready (prev);
		1065	return 1;
		1066	}
		1067	else
		1068	return 0;
860	}	1069	}
861		1070
862	static void	1071	static void
863	api_schedule (void)	1072	api_schedule (void)
864	{	1073	{
865	SV *prev, *next;	1074	struct transfer_args ta;
866		1075
867	prev = SvRV (GvSV (coro_current));	1076	prepare_schedule (&ta);
868	next = coro_deq (PRIO_MIN);	1077	TRANSFER (ta);
869
870	if (!next)
871	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
872
873	coro_mortal = prev;
874	SV_CORO (prev, "Coro::schedule");
875
876	SvRV (GvSV (coro_current)) = next;
877
878	SV_CORO (next, "Coro::schedule");
879
880	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
881	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
882	}	1078	}
883		1079
884	static void	1080	static int
885	api_cede (void)	1081	api_cede (void)
886	{	1082	{
887	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1083	struct transfer_args ta;
888		1084
889	api_schedule ();	1085	prepare_cede (&ta);
		1086
		1087	if (ta.prev != ta.next)
		1088	{
		1089	TRANSFER (ta);
		1090	return 1;
		1091	}
		1092	else
		1093	return 0;
		1094	}
		1095
		1096	static int
		1097	api_cede_notself (void)
		1098	{
		1099	struct transfer_args ta;
		1100
		1101	if (prepare_cede_notself (&ta))
		1102	{
		1103	TRANSFER (ta);
		1104	return 1;
		1105	}
		1106	else
		1107	return 0;
890	}	1108	}
891		1109
892	MODULE = Coro::State PACKAGE = Coro::State	1110	MODULE = Coro::State PACKAGE = Coro::State
893		1111
894	PROTOTYPES: ENABLE	1112	PROTOTYPES: DISABLE
895		1113
896	BOOT:	1114	BOOT:
897	{ /* {} necessary for stoopid perl-5.6.x */	1115	{
898	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1116	#ifdef USE_ITHREADS
899	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1117	MUTEX_INIT (&coro_mutex);
		1118	#endif
		1119	BOOT_PAGESIZE;
		1120
900	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1121	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
901		1122
902	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1123	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
903	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
904	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1125	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1126	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
905	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1127	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
906
907	if (!padlist_cache)
908	padlist_cache = newHV ();
909		1128
910	main_mainstack = PL_mainstack;	1129	main_mainstack = PL_mainstack;
911		1130
912	coroapi.ver = CORO_API_VERSION;	1131	coroapi.ver = CORO_API_VERSION;
913	coroapi.transfer = api_transfer;	1132	coroapi.transfer = api_transfer;
914	}
915		1133
916	Coro::State	1134	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
917	_newprocess(args)	1135	}
918	SV * args	1136
919	PROTOTYPE: $	1137	SV *
		1138	new (char *klass, ...)
920	CODE:	1139	CODE:
921	Coro__State coro;	1140	{
		1141	struct coro *coro;
		1142	HV *hv;
		1143	int i;
922		1144
923	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
924	croak ("Coro::State::_newprocess expects an arrayref");
925
926	New (0, coro, 1, struct coro);	1145	Newz (0, coro, 1, struct coro);
		1146	coro->args = newAV ();
		1147	coro->save = CORO_SAVE_ALL;
		1148	coro->flags = CF_NEW;
927		1149
928	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1150	hv = newHV ();
929	coro->mainstack = 0; /* actual work is done inside transfer */	1151	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
930	coro->stack = 0;	1152	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
931		1153
932	RETVAL = coro;	1154	for (i = 1; i < items; i++)
		1155	av_push (coro->args, newSVsv (ST (i)));
		1156	}
933	OUTPUT:	1157	OUTPUT:
934	RETVAL	1158	RETVAL
935		1159
		1160	int
		1161	save (SV *coro, int new_save = -1)
		1162	CODE:
		1163	RETVAL = api_save (coro, new_save);
		1164	OUTPUT:
		1165	RETVAL
		1166
936	void	1167	void
937	transfer(prev, next, flags)	1168	_set_stacklevel (...)
938	SV *prev	1169	ALIAS:
939	SV *next	1170	Coro::State::transfer = 1
940	int flags	1171	Coro::schedule = 2
941	PROTOTYPE: @	1172	Coro::cede = 3
		1173	Coro::cede_notself = 4
942	CODE:	1174	CODE:
943	PUTBACK;	1175	{
944	SV_CORO (next, "Coro::transfer");	1176	struct transfer_args ta;
945	SV_CORO (prev, "Coro::transfer");	1177
946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1178	switch (ix)
947	SPAGAIN;	1179	{
		1180	case 0:
		1181	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1182	ta.next = 0;
		1183	break;
		1184
		1185	case 1:
		1186	if (items != 2)
		1187	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1188
		1189	prepare_transfer (&ta, ST (0), ST (1));
		1190	break;
		1191
		1192	case 2:
		1193	prepare_schedule (&ta);
		1194	break;
		1195
		1196	case 3:
		1197	prepare_cede (&ta);
		1198	break;
		1199
		1200	case 4:
		1201	if (!prepare_cede_notself (&ta))
		1202	XSRETURN_EMPTY;
		1203
		1204	break;
		1205	}
		1206
		1207	BARRIER;
		1208	TRANSFER (ta);
		1209
		1210	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1211	XSRETURN_YES;
		1212	}
		1213
		1214	bool
		1215	_destroy (SV *coro_sv)
		1216	CODE:
		1217	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1218	OUTPUT:
		1219	RETVAL
948		1220
949	void	1221	void
950	DESTROY(coro)
951	Coro::State coro
952	CODE:
953
954	if (coro->mainstack && coro->mainstack != main_mainstack)
955	{
956	struct coro temp;
957
958	PUTBACK;
959	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
960	LOAD(aTHX_ coro);
961	SPAGAIN;
962
963	destroy_stacks (aTHX);
964
965	LOAD((&temp)); /* this will get rid of defsv etc.. */
966	SPAGAIN;
967
968	coro->mainstack = 0;
969	}
970
971	deallocate_stack (coro);
972
973	Safefree (coro);
974
975	void
976	flush()
977	CODE:
978	#ifdef MAY_FLUSH
979	flush_padlist_cache ();
980	#endif
981
982	void
983	_exit(code)	1222	_exit (code)
984	int code	1223	int code
985	PROTOTYPE: $	1224	PROTOTYPE: $
986	CODE:	1225	CODE:
987	#if defined(__GLIBC__) || _POSIX_C_SOURCE
988	_exit (code);	1226	_exit (code);
989	#else
990	signal (SIGTERM, SIG_DFL);
991	raise (SIGTERM);
992	exit (code);
993	#endif
994		1227
995	MODULE = Coro::State PACKAGE = Coro::Cont	1228	int
		1229	cctx_count ()
		1230	CODE:
		1231	RETVAL = cctx_count;
		1232	OUTPUT:
		1233	RETVAL
996		1234
997	# this is slightly dirty (should expose a c-level api)	1235	int
998		1236	cctx_idle ()
999	void	1237	CODE:
1000	yield(...)	1238	RETVAL = cctx_idle;
1001	PROTOTYPE: @	1239	OUTPUT:
1002	CODE:	1240	RETVAL
1003	static SV *returnstk;
1004	SV *sv;
1005	AV *defav = GvAV (PL_defgv);
1006	struct coro *prev, *next;
1007
1008	if (!returnstk)
1009	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1010
1011	/* set up @_ -- ugly */
1012	av_clear (defav);
1013	av_fill (defav, items - 1);
1014	while (items--)
1015	av_store (defav, items, SvREFCNT_inc (ST(items)));
1016
1017	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1018	sv = av_pop ((AV *)SvRV (returnstk));
1019	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1020	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1021	SvREFCNT_dec (sv);
1022
1023	transfer(aTHX_ prev, next, 0);
1024		1241
1025	MODULE = Coro::State PACKAGE = Coro	1242	MODULE = Coro::State PACKAGE = Coro
1026		1243
1027	# this is slightly dirty (should expose a c-level api)
1028
1029	BOOT:	1244	BOOT:
1030	{	1245	{
1031	int i;	1246	int i;
		1247
1032	HV *stash = gv_stashpv ("Coro", TRUE);	1248	coro_stash = gv_stashpv ("Coro", TRUE);
1033		1249
1034	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1250	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1035	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1251	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1036	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1252	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1037	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1253	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1038	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1254	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1039	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1255	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1040		1256
1041	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1257	coro_current = get_sv ("Coro::current", FALSE);
1042	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1258	SvREADONLY_on (coro_current);
1043		1259
1044	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1260	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1045	coro_ready[i] = newAV ();	1261	coro_ready[i] = newAV ();
1046		1262
1047	{	1263	{
1048	SV *sv = perl_get_sv("Coro::API", 1);	1264	SV *sv = perl_get_sv("Coro::API", 1);
1049		1265
1050	coroapi.schedule = api_schedule;	1266	coroapi.schedule = api_schedule;
		1267	coroapi.save = api_save;
1051	coroapi.cede = api_cede;	1268	coroapi.cede = api_cede;
		1269	coroapi.cede_notself = api_cede_notself;
1052	coroapi.ready = api_ready;	1270	coroapi.ready = api_ready;
		1271	coroapi.is_ready = api_is_ready;
1053	coroapi.nready = &coro_nready;	1272	coroapi.nready = &coro_nready;
1054	coroapi.current = coro_current;	1273	coroapi.current = coro_current;
1055		1274
1056	GCoroAPI = &coroapi;	1275	GCoroAPI = &coroapi;
1057	sv_setiv(sv, (IV)&coroapi);	1276	sv_setiv (sv, (IV)&coroapi);
1058	SvREADONLY_on(sv);	1277	SvREADONLY_on (sv);
1059	}	1278	}
1060	}	1279	}
1061		1280
1062	void	1281	void
1063	ready(self)	1282	_set_current (SV *current)
1064	SV * self
1065	PROTOTYPE: $	1283	PROTOTYPE: $
1066	CODE:	1284	CODE:
1067	api_ready (self);	1285	SvREFCNT_dec (SvRV (coro_current));
		1286	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1068		1287
1069	int	1288	int
		1289	prio (Coro::State coro, int newprio = 0)
		1290	ALIAS:
		1291	nice = 1
		1292	CODE:
		1293	{
		1294	RETVAL = coro->prio;
		1295
		1296	if (items > 1)
		1297	{
		1298	if (ix)
		1299	newprio = coro->prio - newprio;
		1300
		1301	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1302	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1303
		1304	coro->prio = newprio;
		1305	}
		1306	}
		1307	OUTPUT:
		1308	RETVAL
		1309
		1310	SV *
		1311	ready (SV *self)
		1312	PROTOTYPE: $
		1313	CODE:
		1314	RETVAL = boolSV (api_ready (self));
		1315	OUTPUT:
		1316	RETVAL
		1317
		1318	SV *
		1319	is_ready (SV *self)
		1320	PROTOTYPE: $
		1321	CODE:
		1322	RETVAL = boolSV (api_is_ready (self));
		1323	OUTPUT:
		1324	RETVAL
		1325
		1326	int
1070	nready(...)	1327	nready (...)
1071	PROTOTYPE:	1328	PROTOTYPE:
1072	CODE:	1329	CODE:
1073	RETVAL = coro_nready;	1330	RETVAL = coro_nready;
1074	OUTPUT:	1331	OUTPUT:
1075	RETVAL	1332	RETVAL
1076		1333
		1334	MODULE = Coro::State PACKAGE = Coro::AIO
		1335
		1336	SV *
		1337	_get_state ()
		1338	CODE:
		1339	{
		1340	struct io_state *data;
		1341
		1342	RETVAL = newSV (sizeof (struct io_state));
		1343	data = (struct io_state *)SvPVX (RETVAL);
		1344	SvCUR_set (RETVAL, sizeof (struct io_state));
		1345	SvPOK_only (RETVAL);
		1346
		1347	data->errorno = errno;
		1348	data->laststype = PL_laststype;
		1349	data->laststatval = PL_laststatval;
		1350	data->statcache = PL_statcache;
		1351	}
		1352	OUTPUT:
		1353	RETVAL
		1354
1077	void	1355	void
1078	schedule(...)	1356	_set_state (char *data_)
1079	PROTOTYPE:	1357	PROTOTYPE: $
1080	CODE:	1358	CODE:
1081	api_schedule ();	1359	{
		1360	struct io_state *data = (void *)data_;
1082		1361
1083	void	1362	errno = data->errorno;
1084	cede(...)	1363	PL_laststype = data->laststype;
1085	PROTOTYPE:	1364	PL_laststatval = data->laststatval;
1086	CODE:	1365	PL_statcache = data->statcache;
1087	api_cede ();	1366	}
1088		1367

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