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Comparing Coro/Coro/State.xs (file contents):
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC vs.
Revision 1.136 by root, Fri Jan 12 01:05:55 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	/* helper storage struct for Coro::AIO */
		118	struct io_state
		119	{
		120	int errorno;
		121	I32 laststype;
		122	int laststatval;
		123	Stat_t statcache;
		124	};
		125
37	static struct CoroAPI coroapi;	126	static struct CoroAPI coroapi;
		127	static AV *main_mainstack; /* used to differentiate between $main and others */
		128	static HV *coro_state_stash, *coro_stash;
		129	static SV *coro_mortal; /* will be freed after next transfer */
38		130
39	/* this is actually not only the c stack but also c registers etc... */	131	static struct coro_cctx *cctx_first;
		132	static int cctx_count, cctx_idle;
		133
		134	/* this is a structure representing a c-level coroutine */
40	typedef struct {	135	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	136	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		137
45	coro_context cctx;	138	/* the stack */
46
47	void *sptr;	139	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	140	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		141
		142	/* cpu state */
		143	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		144	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		145	JMPENV *top_env;
		146	coro_context cctx;
		147
		148	int inuse;
		149
		150	#if USE_VALGRIND
		151	int valgrind_id;
		152	#endif
		153	} coro_cctx;
		154
		155	enum {
		156	CF_RUNNING = 0x0001, /* coroutine is running */
		157	CF_READY = 0x0002, /* coroutine is ready */
		158	CF_NEW = 0x0004, /* has never been switched to */
		159	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		160	};
		161
		162	/* this is a structure representing a perl-level coroutine */
51	struct coro {	163	struct coro {
52	/* the optional C context */	164	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	165	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
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	AV *comppad;
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		166
95	/* data associated with this coroutine (initial args) */	167	/* data associated with this coroutine (initial args) */
96	AV *args;	168	AV *args;
		169	int refcnt;
		170	int save; /* CORO_SAVE flags */
		171	int flags; /* CF_ flags */
		172
		173	/* optionally saved, might be zero */
		174	AV *defav; /* @_ */
		175	SV *defsv; /* $_ */
		176	SV *errsv; /* $@ */
		177	SV *irssv; /* $/ */
		178	SV *irssv_sv; /* real $/ cache */
		179
		180	#define VAR(name,type) type name;
		181	# include "state.h"
		182	#undef VAR
		183
		184	/* coro process data */
		185	int prio;
97	};	186	};
98		187
99	typedef struct coro *Coro__State;	188	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	189	typedef struct coro *Coro__State_or_hashref;
101		190
102	static AV *main_mainstack; /* used to differentiate between $main and others */	191	static AV *
103	static HV *coro_state_stash;	192	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	{	193	{
113	AV *av;	194	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;	195	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		196
132	newpadlist = newAV ();	197	newpadlist = newAV ();
133	AvREAL_off (newpadlist);	198	AvREAL_off (newpadlist);
134	av_store (newpadlist, 0, (SV *) newpad_name);	199	#if PERL_VERSION_ATLEAST (5,9,0)
		200	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		201	#else
		202	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		203	#endif
		204	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		205	--AvFILLp (padlist);
		206
		207	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
135	av_store (newpadlist, 1, (SV *) newpad);	208	av_store (newpadlist, 1, (SV *)newpad);
136		209
137	av = newAV (); /* will be @_ */	210	return newpadlist;
138	av_extend (av, 0);	211	}
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141		212
142	for (ix = fpad; ix > 0; ix--)	213	static void
		214	free_padlist (AV *padlist)
		215	{
		216	/* may be during global destruction */
		217	if (SvREFCNT (padlist))
143	{	218	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	219	I32 i = AvFILLp (padlist);
145	if (namesv && namesv != &PL_sv_undef)	220	while (i >= 0)
146	{	221	{
147	char *name = SvPVX (namesv); /* XXX */	222	SV **svp = av_fetch (padlist, i--, FALSE);
148	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	223	if (svp)
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}	224	{
152	else
153	{ /* our own lexical */
154	SV *sv;	225	SV *sv;
155	if (*name == '&')	226	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156	sv = SvREFCNT_inc (ppad[ix]);	227	SvREFCNT_dec (sv);
157	else if (*name == '@')	228
158	sv = (SV *) newAV ();	229	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	}	230	}
167	}	231	}
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		232
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);	233	SvREFCNT_dec ((SV*)padlist);
220	}	234	}
221	}	235	}
222	#endif	236
		237	static int
		238	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		239	{
		240	AV *padlist;
		241	AV *av = (AV *)mg->mg_obj;
		242
		243	/* casting is fun. */
		244	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		245	free_padlist (padlist);
		246
		247	SvREFCNT_dec (av);
		248
		249	return 0;
		250	}
		251
		252	#define PERL_MAGIC_coro PERL_MAGIC_ext
		253
		254	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		255
		256	#define CORO_MAGIC(cv) \
		257	SvMAGIC (cv) \
		258	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		259	? SvMAGIC (cv) \
		260	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		261	: 0
223		262
224	/* the next two functions merely cache the padlists */	263	/* the next two functions merely cache the padlists */
225	STATIC void	264	static void
226	get_padlist (CV *cv)	265	get_padlist (CV *cv)
227	{	266	{
228	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	267	MAGIC *mg = CORO_MAGIC (cv);
		268	AV *av;
229		269
230	if (he && AvFILLp ((AV *)*he) >= 0)	270	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
231	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	271	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232	else	272	else
		273	{
		274	#if PREFER_PERL_FUNCTIONS
		275	/* this is probably cleaner, but also slower? */
		276	CV *cp = Perl_cv_clone (cv);
		277	CvPADLIST (cv) = CvPADLIST (cp);
		278	CvPADLIST (cp) = 0;
		279	SvREFCNT_dec (cp);
		280	#else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	281	CvPADLIST (cv) = coro_clone_padlist (cv);
		282	#endif
		283	}
234	}	284	}
235		285
236	STATIC void	286	static void
237	put_padlist (CV *cv)	287	put_padlist (CV *cv)
238	{	288	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);	289	MAGIC *mg = CORO_MAGIC (cv);
		290	AV *av;
240		291
241	if (SvTYPE (*he) != SVt_PVAV)	292	if (!mg)
242	{
243	SvREFCNT_dec (*he);
244	*he = (SV *)newAV ();
245	}	293	{
246		294	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
247	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	295	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
248	}	296	mg->mg_virtual = &vtbl_coro;
249		297	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	{	298	}
259	HE *he;
260	AV *padlist;
261		299
262	while (!!(he = hv_iternext (hv)))	300	av = (AV *)mg->mg_obj;
263	{
264	AV *av = (AV *)HeVAL(he);
265		301
266	/* casting is fun. */	302	if (AvFILLp (av) >= AvMAX (av))
267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	303	av_extend (av, AvMAX (av) + 1);
268	free_padlist (padlist);
269	}
270	}
271		304
272	SvREFCNT_dec (hv);	305	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
273	}	306	}
274	#endif
275		307
276	#define SB do {	308	#define SB do {
277	#define SE } while (0)	309	#define SE } while (0)
278		310
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	311	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
283		312
284	static void	313	static void
285	load_state(pTHX_ Coro__State c)	314	load_perl (Coro__State c)
286	{	315	{
287	PL_dowarn = c->dowarn;	316	#define VAR(name,type) PL_ ## name = c->name;
288	PL_in_eval = c->in_eval;	317	# include "state.h"
289		318	#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_comppad = c->comppad;
297	PL_stack_base = c->stack_base;
298	PL_stack_max = c->stack_max;
299	PL_tmps_stack = c->tmps_stack;
300	PL_tmps_floor = c->tmps_floor;
301	PL_tmps_ix = c->tmps_ix;
302	PL_tmps_max = c->tmps_max;
303	PL_markstack = c->markstack;
304	PL_markstack_ptr = c->markstack_ptr;
305	PL_markstack_max = c->markstack_max;
306	PL_scopestack = c->scopestack;
307	PL_scopestack_ix = c->scopestack_ix;
308	PL_scopestack_max = c->scopestack_max;
309	PL_savestack = c->savestack;
310	PL_savestack_ix = c->savestack_ix;
311	PL_savestack_max = c->savestack_max;
312	PL_retstack = c->retstack;
313	PL_retstack_ix = c->retstack_ix;
314	PL_retstack_max = c->retstack_max;
315	PL_curcop = c->curcop;
316	PL_top_env = c->top_env;
317		319
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	320	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	321	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	322	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		323	if (c->irssv)
		324	{
		325	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		326	SvREFCNT_dec (c->irssv);
		327	else
		328	{
		329	REPLACE_SV (PL_rs, c->irssv);
		330	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		331	sv_setsv (c->irssv_sv, PL_rs);
		332	}
		333	}
321		334
322	{	335	{
323	dSP;	336	dSP;
324	CV *cv;	337	CV *cv;
325		338
326	/* now do the ugly restore mess */	339	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	340	while ((cv = (CV *)POPs))
328	{	341	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	342	put_padlist (cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	343	CvDEPTH (cv) = PTR2IV (POPs);
335	#ifdef USE_THREADS	344	CvPADLIST (cv) = (AV *)POPs;
336	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
337	#endif
338	}
339
340	++CvDEPTH(cv);
341	}	345	}
342		346
343	PUTBACK;	347	PUTBACK;
344	}	348	}
345	}	349	}
346		350
347	static void	351	static void
348	save_state(pTHX_ Coro__State c, int flags)	352	save_perl (Coro__State c)
349	{	353	{
350	{	354	{
351	dSP;	355	dSP;
352	I32 cxix = cxstack_ix;	356	I32 cxix = cxstack_ix;
353	PERL_CONTEXT *ccstk = cxstack;	357	PERL_CONTEXT *ccstk = cxstack;
…		…
356	/*	360	/*
357	* the worst thing you can imagine happens first - we have to save	361	* the worst thing you can imagine happens first - we have to save
358	* (and reinitialize) all cv's in the whole callchain :(	362	* (and reinitialize) all cv's in the whole callchain :(
359	*/	363	*/
360		364
		365	EXTEND (SP, 3 + 1);
361	PUSHs (Nullsv);	366	PUSHs (Nullsv);
362	/* this loop was inspired by pp_caller */	367	/* this loop was inspired by pp_caller */
363	for (;;)	368	for (;;)
364	{	369	{
365	while (cxix >= 0)	370	while (cxix >= 0)
366	{	371	{
367	PERL_CONTEXT *cx = &ccstk[cxix--];	372	PERL_CONTEXT *cx = &ccstk[cxix--];
368		373
369	if (CxTYPE(cx) == CXt_SUB)	374	if (CxTYPE (cx) == CXt_SUB)
370	{	375	{
371	CV *cv = cx->blk_sub.cv;	376	CV *cv = cx->blk_sub.cv;
		377
372	if (CvDEPTH(cv))	378	if (CvDEPTH (cv))
373	{	379	{
374	#ifdef USE_THREADS
375	/*XPUSHs ((SV *)CvOWNER(cv));*/
376	/*CvOWNER(cv) = 0;*/
377	/*error must unlock this cv etc.. etc...*/
378	#endif
379	EXTEND (SP, CvDEPTH(cv)*2);	380	EXTEND (SP, 3);
380
381	while (--CvDEPTH(cv))
382	{
383	/* this tells the restore code to increment CvDEPTH */
384	PUSHs (Nullsv);
385	PUSHs ((SV *)cv);
386	}
387
388	PUSHs ((SV *)CvPADLIST(cv));	381	PUSHs ((SV *)CvPADLIST (cv));
		382	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
389	PUSHs ((SV *)cv);	383	PUSHs ((SV *)cv);
390		384
		385	CvDEPTH (cv) = 0;
391	get_padlist (cv); /* this is a monster */	386	get_padlist (cv);
392	}	387	}
393	}
394	else if (CxTYPE(cx) == CXt_FORMAT)
395	{
396	/* I never used formats, so how should I know how these are implemented? */
397	/* my bold guess is as a simple, plain sub... */
398	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
399	}	388	}
400	}	389	}
401		390
402	if (top_si->si_type == PERLSI_MAIN)	391	if (top_si->si_type == PERLSI_MAIN)
403	break;	392	break;
…		…
408	}	397	}
409		398
410	PUTBACK;	399	PUTBACK;
411	}	400	}
412		401
413	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	402	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
414	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	403	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
415	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	404	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		405	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
416		406
417	c->dowarn = PL_dowarn;	407	#define VAR(name,type)c->name = PL_ ## name;
418	c->in_eval = PL_in_eval;	408	# include "state.h"
419		409	#undef VAR
420	c->curstackinfo = PL_curstackinfo;
421	c->curstack = PL_curstack;
422	c->mainstack = PL_mainstack;
423	c->stack_sp = PL_stack_sp;
424	c->op = PL_op;
425	c->curpad = PL_curpad;
426	c->comppad = PL_comppad;
427	c->stack_base = PL_stack_base;
428	c->stack_max = PL_stack_max;
429	c->tmps_stack = PL_tmps_stack;
430	c->tmps_floor = PL_tmps_floor;
431	c->tmps_ix = PL_tmps_ix;
432	c->tmps_max = PL_tmps_max;
433	c->markstack = PL_markstack;
434	c->markstack_ptr = PL_markstack_ptr;
435	c->markstack_max = PL_markstack_max;
436	c->scopestack = PL_scopestack;
437	c->scopestack_ix = PL_scopestack_ix;
438	c->scopestack_max = PL_scopestack_max;
439	c->savestack = PL_savestack;
440	c->savestack_ix = PL_savestack_ix;
441	c->savestack_max = PL_savestack_max;
442	c->retstack = PL_retstack;
443	c->retstack_ix = PL_retstack_ix;
444	c->retstack_max = PL_retstack_max;
445	c->curcop = PL_curcop;
446	c->top_env = PL_top_env;
447	}	410	}
448		411
449	/*	412	/*
450	* allocate various perl stacks. This is an exact copy	413	* allocate various perl stacks. This is an exact copy
451	* of perl.c:init_stacks, except that it uses less memory	414	* of perl.c:init_stacks, except that it uses less memory
452	* on the assumption that coroutines do not usually need	415	* on the (sometimes correct) assumption that coroutines do
453	* a lot of stackspace.	416	* not usually need a lot of stackspace.
454	*/	417	*/
455	STATIC void	418	#if PREFER_PERL_FUNCTIONS
		419	# define coro_init_stacks init_stacks
		420	#else
		421	static void
456	coro_init_stacks (pTHX)	422	coro_init_stacks ()
457	{	423	{
458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	424	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
459	PL_curstackinfo->si_type = PERLSI_MAIN;	425	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;	426	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	427	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462		428
463	PL_stack_base = AvARRAY(PL_curstack);	429	PL_stack_base = AvARRAY(PL_curstack);
464	PL_stack_sp = PL_stack_base;	430	PL_stack_sp = PL_stack_base;
465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	431	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466		432
467	New(50,PL_tmps_stack,96,SV*);	433	New(50,PL_tmps_stack,128,SV*);
468	PL_tmps_floor = -1;	434	PL_tmps_floor = -1;
469	PL_tmps_ix = -1;	435	PL_tmps_ix = -1;
470	PL_tmps_max = 96;	436	PL_tmps_max = 128;
471		437
472	New(54,PL_markstack,16,I32);	438	New(54,PL_markstack,32,I32);
473	PL_markstack_ptr = PL_markstack;	439	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;	440	PL_markstack_max = PL_markstack + 32;
475		441
		442	#ifdef SET_MARK_OFFSET
476	SET_MARK_OFFSET;	443	SET_MARK_OFFSET;
		444	#endif
477		445
478	New(54,PL_scopestack,16,I32);	446	New(54,PL_scopestack,32,I32);
479	PL_scopestack_ix = 0;	447	PL_scopestack_ix = 0;
480	PL_scopestack_max = 16;	448	PL_scopestack_max = 32;
481		449
482	New(54,PL_savestack,96,ANY);	450	New(54,PL_savestack,64,ANY);
483	PL_savestack_ix = 0;	451	PL_savestack_ix = 0;
484	PL_savestack_max = 96;	452	PL_savestack_max = 64;
485		453
		454	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	455	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	456	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	457	PL_retstack_max = 16;
		458	#endif
489	}	459	}
		460	#endif
490		461
491	/*	462	/*
492	* destroy the stacks, the callchain etc...	463	* destroy the stacks, the callchain etc...
493	* still there is a memleak of 128 bytes...
494	*/	464	*/
495	STATIC void	465	static void
496	destroy_stacks(pTHX)	466	coro_destroy_stacks ()
497	{	467	{
498	if (!IN_DESTRUCT)	468	if (!IN_DESTRUCT)
499	{	469	{
500	/* is this ugly, I ask? */	470	/* restore all saved variables and stuff */
501	while (PL_scopestack_ix)	471	LEAVE_SCOPE (0);
502	LEAVE;	472	assert (PL_tmps_floor == -1);
503		473
504	/* sure it is, but more important: is it correct?? :/ */	474	/* free all temporaries */
505	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
506	FREETMPS;	475	FREETMPS;
		476	assert (PL_tmps_ix == -1);
		477
		478	/* unwind all extra stacks */
		479	POPSTACK_TO (PL_mainstack);
		480
		481	/* unwind main stack */
		482	dounwind (-1);
507	}	483	}
508		484
509	while (PL_curstackinfo->si_next)	485	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	486	PL_curstackinfo = PL_curstackinfo->si_next;
511		487
512	while (PL_curstackinfo)	488	while (PL_curstackinfo)
513	{	489	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	490	PERL_SI *p = PL_curstackinfo->si_prev;
515		491
516	{
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	492	if (!IN_DESTRUCT)
523	{
524	dounwind(-1);
525	SvREFCNT_dec(PL_curstackinfo->si_stack);	493	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		494
528	Safefree(PL_curstackinfo->si_cxstack);	495	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree(PL_curstackinfo);	496	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	497	PL_curstackinfo = p;
531	}	498	}
532		499
533	Safefree(PL_tmps_stack);	500	Safefree (PL_tmps_stack);
534	Safefree(PL_markstack);	501	Safefree (PL_markstack);
535	Safefree(PL_scopestack);	502	Safefree (PL_scopestack);
536	Safefree(PL_savestack);	503	Safefree (PL_savestack);
		504	#if !PERL_VERSION_ATLEAST (5,9,0)
537	Safefree(PL_retstack);	505	Safefree (PL_retstack);
538	}
539
540	static void
541	allocate_stack (Coro__State ctx, int alloc)
542	{
543	coro_stack *stack;
544
545	New (0, stack, 1, coro_stack);
546
547	stack->refcnt = 1;
548	stack->usecnt = 1;
549	stack->gencnt = ctx->gencnt = 0;
550	if (alloc)
551	{
552	#if HAVE_MMAP
553	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
554	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555	if (stack->sptr == (void *)-1)
556	#endif	506	#endif
557	{
558	/*FIXME*//*D*//* reasonable stack size! */
559	stack->ssize = -4096 * sizeof (long);
560	New (0, stack->sptr, 4096, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565
566	ctx->stack = stack;
567	}	507	}
568		508
569	static void	509	static void
570	deallocate_stack (Coro__State ctx)	510	setup_coro (struct coro *coro)
571	{
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{
578	if (!--stack->refcnt)
579	{
580	#ifdef HAVE_MMAP
581	if (stack->ssize > 0 && stack->sptr)
582	munmap (stack->sptr, stack->ssize);
583	else
584	#else
585	Safefree (stack->sptr);
586	#endif
587	Safefree (stack);
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}
593
594	static void
595	setup_coro (void *arg)
596	{	511	{
597	/*	512	/*
598	* emulate part of the perl startup here.	513	* emulate part of the perl startup here.
599	*/	514	*/
		515
		516	coro_init_stacks ();
		517
		518	PL_curcop = &PL_compiling;
		519	PL_in_eval = EVAL_NULL;
		520	PL_curpm = 0;
		521	PL_localizing = 0;
		522	PL_dirty = 0;
		523	PL_restartop = 0;
		524
		525	{
		526	dSP;
		527	LOGOP myop;
		528
		529	SvREFCNT_dec (GvAV (PL_defgv));
		530	GvAV (PL_defgv) = coro->args; coro->args = 0;
		531
		532	Zero (&myop, 1, LOGOP);
		533	myop.op_next = Nullop;
		534	myop.op_flags = OPf_WANT_VOID;
		535
		536	PUSHMARK (SP);
		537	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		538	PUTBACK;
		539	PL_op = (OP *)&myop;
		540	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		541	SPAGAIN;
		542	}
		543
		544	ENTER; /* necessary e.g. for dounwind */
		545	}
		546
		547	static void
		548	free_coro_mortal ()
		549	{
		550	if (coro_mortal)
		551	{
		552	SvREFCNT_dec (coro_mortal);
		553	coro_mortal = 0;
		554	}
		555	}
		556
		557	/* inject a fake call to Coro::State::_cctx_init into the execution */
		558	static void NOINLINE
		559	prepare_cctx (coro_cctx *cctx)
		560	{
600	dSP;	561	dSP;
601	Coro__State ctx = (Coro__State)arg;	562	LOGOP myop;
602	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
603		563
604	coro_init_stacks (aTHX);	564	Zero (&myop, 1, LOGOP);
605	/*PL_curcop = 0;*/	565	myop.op_next = PL_op;
606	/*PL_in_eval = PL_in_eval;*/ /* inherit */	566	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
607	SvREFCNT_dec (GvAV (PL_defgv));
608	GvAV (PL_defgv) = ctx->args;
609		567
		568	PUSHMARK (SP);
		569	EXTEND (SP, 2);
		570	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		571	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		572	PUTBACK;
		573	PL_op = (OP *)&myop;
		574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
610	SPAGAIN;	575	SPAGAIN;
611
612	if (ctx->stack)
613	{
614	ctx->cursp = 0;
615
616	PUSHMARK(SP);
617	PUTBACK;
618	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
619
620	if (SvTRUE (ERRSV))
621	croak (NULL);
622	else
623	croak ("FATAL: CCTXT coroutine returned!");
624	}
625	else
626	{
627	UNOP myop;
628
629	PL_op = (OP *)&myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PUSHMARK(SP);
636	XPUSHs (sub_init);
637	/*
638	* the next line is slightly wrong, as PL_op->op_next
639	* is actually being executed so we skip the first op.
640	* that doesn't matter, though, since it is only
641	* pp_nextstate and we never return...
642	* ah yes, and I don't care anyways ;)
643	*/
644	PUTBACK;
645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646	SPAGAIN;
647
648	ENTER; /* necessary e.g. for dounwind */
649	}
650	}	576	}
651		577
652	static void	578	static void
653	continue_coro (void *arg)	579	coro_run (void *arg)
654	{	580	{
		581	/* coro_run is the alternative tail of transfer(), so unlock here. */
		582	UNLOCK;
		583
655	/*	584	/*
656	* this is a _very_ stripped down perl interpreter ;)	585	* this is a _very_ stripped down perl interpreter ;)
657	*/	586	*/
658	Coro__State ctx = (Coro__State)arg;
659	JMPENV coro_start_env;
660
661	/* same as JMPENV_BOOTSTRAP */
662	Zero(&coro_start_env, 1, JMPENV);
663	coro_start_env.je_ret = -1;
664	coro_start_env.je_mustcatch = TRUE;
665	PL_top_env = &coro_start_env;	587	PL_top_env = &PL_start_env;
666		588
667	ctx->cursp = 0;	589	/* inject call to cctx_init */
668	PL_op = PL_op->op_next;	590	prepare_cctx ((coro_cctx *)arg);
669	CALLRUNOPS(aTHX);
670		591
		592	/* somebody will hit me for both perl_run and PL_restartop */
		593	PL_restartop = PL_op;
		594	perl_run (PL_curinterp);
		595
		596	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
671	abort ();	597	abort ();
672	}	598	}
673		599
674	STATIC void	600	static coro_cctx *
		601	cctx_new ()
		602	{
		603	coro_cctx *cctx;
		604
		605	++cctx_count;
		606
		607	Newz (0, cctx, 1, coro_cctx);
		608
		609	#if HAVE_MMAP
		610
		611	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		612	/* mmap supposedly does allocate-on-write for us */
		613	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		614
		615	if (cctx->sptr == (void *)-1)
		616	{
		617	perror ("FATAL: unable to mmap stack for coroutine");
		618	_exit (EXIT_FAILURE);
		619	}
		620
		621	# if STACKGUARD
		622	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		623	# endif
		624
		625	#else
		626
		627	cctx->ssize = STACKSIZE * (long)sizeof (long);
		628	New (0, cctx->sptr, STACKSIZE, long);
		629
		630	if (!cctx->sptr)
		631	{
		632	perror ("FATAL: unable to malloc stack for coroutine");
		633	_exit (EXIT_FAILURE);
		634	}
		635
		636	#endif
		637
		638	#if USE_VALGRIND
		639	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		640	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		641	cctx->ssize + (char *)cctx->sptr
		642	);
		643	#endif
		644
		645	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		646
		647	return cctx;
		648	}
		649
		650	static void
		651	cctx_destroy (coro_cctx *cctx)
		652	{
		653	if (!cctx)
		654	return;
		655
		656	--cctx_count;
		657
		658	#if USE_VALGRIND
		659	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		660	#endif
		661
		662	#if HAVE_MMAP
		663	munmap (cctx->sptr, cctx->ssize);
		664	#else
		665	Safefree (cctx->sptr);
		666	#endif
		667
		668	Safefree (cctx);
		669	}
		670
		671	static coro_cctx *
		672	cctx_get ()
		673	{
		674	coro_cctx *cctx;
		675
		676	if (cctx_first)
		677	{
		678	cctx = cctx_first;
		679	cctx_first = cctx->next;
		680	--cctx_idle;
		681	}
		682	else
		683	{
		684	cctx = cctx_new ();
		685	PL_op = PL_op->op_next;
		686	}
		687
		688	return cctx;
		689	}
		690
		691	static void
		692	cctx_put (coro_cctx *cctx)
		693	{
		694	/* free another cctx if overlimit */
		695	if (cctx_idle >= MAX_IDLE_CCTX)
		696	{
		697	coro_cctx *first = cctx_first;
		698	cctx_first = first->next;
		699	--cctx_idle;
		700
		701	assert (!first->inuse);
		702	cctx_destroy (first);
		703	}
		704
		705	++cctx_idle;
		706	cctx->next = cctx_first;
		707	cctx_first = cctx;
		708	}
		709
		710	/* never call directly, always through the coro_state_transfer global variable */
		711	static void NOINLINE
675	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	712	transfer (struct coro *prev, struct coro *next)
676	{	713	{
677	dSTACKLEVEL;	714	dSTACKLEVEL;
678	static struct coro *xnext;
679		715
		716	/* sometimes transfer is only called to set idle_sp */
		717	if (!next)
		718	{
		719	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		720	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		721	}
680	if (prev != next)	722	else if (prev != next)
681	{	723	{
682	xnext = next;	724	coro_cctx *prev__cctx;
683		725
684	if (next->mainstack)	726	if (prev->flags & CF_NEW)
685	{	727	{
686	SAVE (prev, flags);	728	/* create a new empty context */
687	LOAD (next);	729	Newz (0, prev->cctx, 1, coro_cctx);
688		730	prev->cctx->inuse = 1;
689	/* mark this state as in-use */	731	prev->flags &= ~CF_NEW;
690	next->mainstack = 0;	732	prev->flags |= CF_RUNNING;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	/* don't add any code here */
717	}
718
719	}	733	}
720	else if (next->tmps_ix == -2)	734
721	croak ("tried to transfer to running coroutine");	735	/*TODO: must not croak here */
		736	if (!prev->flags & CF_RUNNING)
		737	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		738
		739	if (next->flags & CF_RUNNING)
		740	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		741
		742	if (next->flags & CF_DESTROYED)
		743	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		744
		745	prev->flags &= ~CF_RUNNING;
		746	next->flags |= CF_RUNNING;
		747
		748	LOCK;
		749
		750	if (next->flags & CF_NEW)
		751	{
		752	/* need to start coroutine */
		753	next->flags &= ~CF_NEW;
		754	/* first get rid of the old state */
		755	save_perl (prev);
		756	/* setup coroutine call */
		757	setup_coro (next);
		758	/* need a new stack */
		759	assert (!next->cctx);
		760	}
722	else	761	else
723	{	762	{
724	SAVE (prev, -1); /* first get rid of the old state */	763	/* coroutine already started */
725		764	save_perl (prev);
726	if (flags & TRANSFER_SAVE_CCTXT)	765	load_perl (next);
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	setup_coro (next);
734
735	prev->stack->refcnt++;
736	prev->stack->usecnt++;
737	next->stack = prev->stack;
738	next->gencnt = prev->gencnt;
739	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	/* don't add any code here */
748	}
749	}
750	else
751	setup_coro (next);
752	}	766	}
753		767
754	/*	768	prev__cctx = prev->cctx;
755	* xnext is now either prev or next, depending on wether	769
756	* we switched the c stack or not. that's why I use a global	770	/* possibly "free" the cctx */
757	* variable, that should become thread-specific at one point.	771	if (prev__cctx->idle_sp == STACKLEVEL)
758	*/	772	{
759	xnext->cursp = stacklevel;	773	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
760	}	774	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
761		775
762	if (coro_mortal)	776	prev->cctx = 0;
		777
		778	cctx_put (prev__cctx);
		779	prev__cctx->inuse = 0;
		780	}
		781
		782	if (!next->cctx)
		783	{
		784	next->cctx = cctx_get ();
		785	assert (!next->cctx->inuse);
		786	next->cctx->inuse = 1;
		787	}
		788
		789	if (prev__cctx != next->cctx)
		790	{
		791	prev__cctx->top_env = PL_top_env;
		792	PL_top_env = next->cctx->top_env;
		793	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		794	}
		795
		796	free_coro_mortal ();
		797	UNLOCK;
763	{	798	}
764	SvREFCNT_dec (coro_mortal);	799	}
765	coro_mortal = 0;	800
		801	struct transfer_args
		802	{
		803	struct coro *prev, *next;
		804	};
		805
		806	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		807
		808	static int
		809	coro_state_destroy (struct coro *coro)
		810	{
		811	if (coro->flags & CF_DESTROYED)
		812	return 0;
		813
		814	coro->flags |= CF_DESTROYED;
		815
		816	if (coro->mainstack && coro->mainstack != main_mainstack)
766	}	817	{
767	}	818	assert (!(coro->flags & CF_RUNNING));
768		819
769	#define SV_CORO(sv,func) \	820	struct coro temp;
770	do { \	821	Zero (&temp, 1, struct coro);
771	if (SvROK (sv)) \	822	temp.save = CORO_SAVE_ALL;
772	sv = SvRV (sv); \
773	\
774	if (SvTYPE(sv) == SVt_PVHV) \
775	{ \
776	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
777	\
778	if (!he) \
779	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
780	\
781	(sv) = SvRV (HeVAL(he)); \
782	} \
783	\
784	/* must also be changed inside Coro::Cont::yield */ \
785	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
786	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
787	\
788	} while(0)
789		823
790	#define SvSTATE(sv) (struct coro *)SvIV (sv)	824	if (coro->flags & CF_RUNNING)
		825	croak ("FATAL: tried to destroy currently running coroutine");
791		826
		827	save_perl (&temp);
		828	load_perl (coro);
		829
		830	coro_destroy_stacks ();
		831
		832	load_perl (&temp); /* this will get rid of defsv etc.. */
		833
		834	coro->mainstack = 0;
		835	}
		836
		837	cctx_destroy (coro->cctx);
		838	SvREFCNT_dec (coro->args);
		839
		840	return 1;
		841	}
		842
792	static void	843	static int
		844	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		845	{
		846	struct coro *coro = (struct coro *)mg->mg_ptr;
		847	mg->mg_ptr = 0;
		848
		849	if (--coro->refcnt < 0)
		850	{
		851	coro_state_destroy (coro);
		852	Safefree (coro);
		853	}
		854
		855	return 0;
		856	}
		857
		858	static int
		859	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		860	{
		861	struct coro *coro = (struct coro *)mg->mg_ptr;
		862
		863	++coro->refcnt;
		864
		865	return 0;
		866	}
		867
		868	static MGVTBL coro_state_vtbl = {
		869	0, 0, 0, 0,
		870	coro_state_free,
		871	0,
		872	#ifdef MGf_DUP
		873	coro_state_dup,
		874	#else
		875	# define MGf_DUP 0
		876	#endif
		877	};
		878
		879	static struct coro *
		880	SvSTATE (SV *coro)
		881	{
		882	HV *stash;
		883	MAGIC *mg;
		884
		885	if (SvROK (coro))
		886	coro = SvRV (coro);
		887
		888	stash = SvSTASH (coro);
		889	if (stash != coro_stash && stash != coro_state_stash)
		890	{
		891	/* very slow, but rare, check */
		892	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		893	croak ("Coro::State object required");
		894	}
		895
		896	mg = SvMAGIC (coro);
		897	assert (mg->mg_type == PERL_MAGIC_ext);
		898	return (struct coro *)mg->mg_ptr;
		899	}
		900
		901	static void
		902	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		903	{
		904	ta->prev = SvSTATE (prev_sv);
		905	ta->next = SvSTATE (next_sv);
		906	}
		907
		908	static void
793	api_transfer(pTHX_ SV *prev, SV *next, int flags)	909	api_transfer (SV *prev_sv, SV *next_sv)
794	{	910	{
795	SV_CORO (prev, "Coro::transfer");	911	struct transfer_args ta;
796	SV_CORO (next, "Coro::transfer");
797		912
798	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	913	prepare_transfer (&ta, prev_sv, next_sv);
		914	TRANSFER (ta);
		915	}
		916
		917	static int
		918	api_save (SV *coro_sv, int new_save)
		919	{
		920	struct coro *coro = SvSTATE (coro_sv);
		921	int old_save = coro->save;
		922
		923	if (new_save >= 0)
		924	coro->save = new_save;
		925
		926	return old_save;
799	}	927	}
800		928
801	/** Coro ********************************************************************/	929	/** Coro ********************************************************************/
802		930
803	#define PRIO_MAX 3	931	#define PRIO_MAX 3
…		…
806	#define PRIO_LOW -1	934	#define PRIO_LOW -1
807	#define PRIO_IDLE -3	935	#define PRIO_IDLE -3
808	#define PRIO_MIN -4	936	#define PRIO_MIN -4
809		937
810	/* for Coro.pm */	938	/* for Coro.pm */
811	static GV *coro_current, *coro_idle;	939	static SV *coro_current;
812	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	940	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;	941	static int coro_nready;
814		942
815	static void	943	static void
816	coro_enq (SV *sv)	944	coro_enq (SV *coro_sv)
817	{	945	{
818	if (SvTYPE (sv) == SVt_PVHV)
819	{
820	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
821	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
822
823	prio = prio > PRIO_MAX ? PRIO_MAX
824	: prio < PRIO_MIN ? PRIO_MIN
825	: prio;
826
827	av_push (coro_ready [prio - PRIO_MIN], sv);	946	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
828	coro_nready++;	947	coro_nready++;
829
830	return;
831	}
832
833	croak ("Coro::ready tried to enqueue something that is not a coroutine");
834	}	948	}
835		949
836	static SV *	950	static SV *
837	coro_deq (int min_prio)	951	coro_deq (int min_prio)
838	{	952	{
…		…
841	min_prio -= PRIO_MIN;	955	min_prio -= PRIO_MIN;
842	if (min_prio < 0)	956	if (min_prio < 0)
843	min_prio = 0;	957	min_prio = 0;
844		958
845	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	959	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
846	if (av_len (coro_ready[prio]) >= 0)	960	if (AvFILLp (coro_ready [prio]) >= 0)
847	{	961	{
848	coro_nready--;	962	coro_nready--;
849	return av_shift (coro_ready[prio]);	963	return av_shift (coro_ready [prio]);
850	}	964	}
851		965
852	return 0;	966	return 0;
853	}	967	}
854		968
855	static void	969	static int
856	api_ready (SV *coro)	970	api_ready (SV *coro_sv)
857	{	971	{
		972	struct coro *coro;
		973
858	if (SvROK (coro))	974	if (SvROK (coro_sv))
859	coro = SvRV (coro);	975	coro_sv = SvRV (coro_sv);
860		976
		977	coro = SvSTATE (coro_sv);
		978
		979	if (coro->flags & CF_READY)
		980	return 0;
		981
		982	coro->flags |= CF_READY;
		983
		984	LOCK;
861	coro_enq (SvREFCNT_inc (coro));	985	coro_enq (SvREFCNT_inc (coro_sv));
		986	UNLOCK;
		987
		988	return 1;
		989	}
		990
		991	static int
		992	api_is_ready (SV *coro_sv)
		993	{
		994	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		995	}
		996
		997	static void
		998	prepare_schedule (struct transfer_args *ta)
		999	{
		1000	SV *prev_sv, *next_sv;
		1001
		1002	for (;;)
		1003	{
		1004	LOCK;
		1005	next_sv = coro_deq (PRIO_MIN);
		1006	UNLOCK;
		1007
		1008	/* nothing to schedule: call the idle handler */
		1009	if (!next_sv)
		1010	{
		1011	dSP;
		1012
		1013	ENTER;
		1014	SAVETMPS;
		1015
		1016	PUSHMARK (SP);
		1017	PUTBACK;
		1018	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1019
		1020	FREETMPS;
		1021	LEAVE;
		1022	continue;
		1023	}
		1024
		1025	ta->next = SvSTATE (next_sv);
		1026
		1027	/* cannot transfer to destroyed coros, skip and look for next */
		1028	if (ta->next->flags & CF_DESTROYED)
		1029	{
		1030	SvREFCNT_dec (next_sv);
		1031	continue;
		1032	}
		1033
		1034	break;
		1035	}
		1036
		1037	/* free this only after the transfer */
		1038	prev_sv = SvRV (coro_current);
		1039	SvRV_set (coro_current, next_sv);
		1040	ta->prev = SvSTATE (prev_sv);
		1041
		1042	assert (ta->next->flags & CF_READY);
		1043	ta->next->flags &= ~CF_READY;
		1044
		1045	LOCK;
		1046	free_coro_mortal ();
		1047	coro_mortal = prev_sv;
		1048	UNLOCK;
		1049	}
		1050
		1051	static void
		1052	prepare_cede (struct transfer_args *ta)
		1053	{
		1054	api_ready (coro_current);
		1055	prepare_schedule (ta);
		1056	}
		1057
		1058	static int
		1059	prepare_cede_notself (struct transfer_args *ta)
		1060	{
		1061	if (coro_nready)
		1062	{
		1063	SV *prev = SvRV (coro_current);
		1064	prepare_schedule (ta);
		1065	api_ready (prev);
		1066	return 1;
		1067	}
		1068	else
		1069	return 0;
862	}	1070	}
863		1071
864	static void	1072	static void
865	api_schedule (void)	1073	api_schedule (void)
866	{	1074	{
867	SV *prev, *next;	1075	struct transfer_args ta;
868		1076
869	prev = SvRV (GvSV (coro_current));	1077	prepare_schedule (&ta);
870	next = coro_deq (PRIO_MIN);	1078	TRANSFER (ta);
871
872	if (!next)
873	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
874
875	/* free this only after the transfer */
876	coro_mortal = prev;
877	SV_CORO (prev, "Coro::schedule");
878
879	SvRV (GvSV (coro_current)) = next;
880
881	SV_CORO (next, "Coro::schedule");
882
883	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
884	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
885	}	1079	}
886		1080
887	static void	1081	static int
888	api_cede (void)	1082	api_cede (void)
889	{	1083	{
890	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1084	struct transfer_args ta;
891		1085
892	api_schedule ();	1086	prepare_cede (&ta);
		1087
		1088	if (ta.prev != ta.next)
		1089	{
		1090	TRANSFER (ta);
		1091	return 1;
		1092	}
		1093	else
		1094	return 0;
		1095	}
		1096
		1097	static int
		1098	api_cede_notself (void)
		1099	{
		1100	struct transfer_args ta;
		1101
		1102	if (prepare_cede_notself (&ta))
		1103	{
		1104	TRANSFER (ta);
		1105	return 1;
		1106	}
		1107	else
		1108	return 0;
893	}	1109	}
894		1110
895	MODULE = Coro::State PACKAGE = Coro::State	1111	MODULE = Coro::State PACKAGE = Coro::State
896		1112
897	PROTOTYPES: ENABLE	1113	PROTOTYPES: DISABLE
898		1114
899	BOOT:	1115	BOOT:
900	{ /* {} necessary for stoopid perl-5.6.x */	1116	{
901	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1117	#ifdef USE_ITHREADS
902	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1118	MUTEX_INIT (&coro_mutex);
		1119	#endif
		1120	BOOT_PAGESIZE;
		1121
903	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1122	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
904		1123
905	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
906	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1125	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
907	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1126	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1127	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
908	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1128	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
909
910	if (!padlist_cache)
911	padlist_cache = newHV ();
912		1129
913	main_mainstack = PL_mainstack;	1130	main_mainstack = PL_mainstack;
914		1131
915	coroapi.ver = CORO_API_VERSION;	1132	coroapi.ver = CORO_API_VERSION;
916	coroapi.transfer = api_transfer;	1133	coroapi.transfer = api_transfer;
917	}
918		1134
919	Coro::State	1135	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920	_newprocess(args)	1136	}
921	SV * args	1137
922	PROTOTYPE: $	1138	SV *
		1139	new (char *klass, ...)
923	CODE:	1140	CODE:
924	Coro__State coro;	1141	{
		1142	struct coro *coro;
		1143	HV *hv;
		1144	int i;
925		1145
926	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
927	croak ("Coro::State::_newprocess expects an arrayref");
928
929	New (0, coro, 1, struct coro);	1146	Newz (0, coro, 1, struct coro);
		1147	coro->args = newAV ();
		1148	coro->save = CORO_SAVE_ALL;
		1149	coro->flags = CF_NEW;
930		1150
931	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1151	hv = newHV ();
932	coro->mainstack = 0; /* actual work is done inside transfer */	1152	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
933	coro->stack = 0;	1153	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
934		1154
935	RETVAL = coro;	1155	for (i = 1; i < items; i++)
		1156	av_push (coro->args, newSVsv (ST (i)));
		1157	}
936	OUTPUT:	1158	OUTPUT:
937	RETVAL	1159	RETVAL
938		1160
		1161	int
		1162	save (SV *coro, int new_save = -1)
		1163	CODE:
		1164	RETVAL = api_save (coro, new_save);
		1165	OUTPUT:
		1166	RETVAL
		1167
939	void	1168	void
940	transfer(prev, next, flags)	1169	_set_stacklevel (...)
941	SV *prev	1170	ALIAS:
942	SV *next	1171	Coro::State::transfer = 1
943	int flags	1172	Coro::schedule = 2
944	PROTOTYPE: @	1173	Coro::cede = 3
		1174	Coro::cede_notself = 4
945	CODE:	1175	CODE:
946	PUTBACK;	1176	{
947	SV_CORO (next, "Coro::transfer");	1177	struct transfer_args ta;
948	SV_CORO (prev, "Coro::transfer");	1178
949	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1179	switch (ix)
950	SPAGAIN;	1180	{
		1181	case 0:
		1182	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1183	ta.next = 0;
		1184	break;
		1185
		1186	case 1:
		1187	if (items != 2)
		1188	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1189
		1190	prepare_transfer (&ta, ST (0), ST (1));
		1191	break;
		1192
		1193	case 2:
		1194	prepare_schedule (&ta);
		1195	break;
		1196
		1197	case 3:
		1198	prepare_cede (&ta);
		1199	break;
		1200
		1201	case 4:
		1202	if (!prepare_cede_notself (&ta))
		1203	XSRETURN_EMPTY;
		1204
		1205	break;
		1206	}
		1207
		1208	BARRIER;
		1209	TRANSFER (ta);
		1210
		1211	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1212	XSRETURN_YES;
		1213	}
		1214
		1215	bool
		1216	_destroy (SV *coro_sv)
		1217	CODE:
		1218	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1219	OUTPUT:
		1220	RETVAL
951		1221
952	void	1222	void
953	DESTROY(coro)
954	Coro::State coro
955	CODE:
956
957	if (coro->mainstack && coro->mainstack != main_mainstack)
958	{
959	struct coro temp;
960
961	PUTBACK;
962	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
963	LOAD(aTHX_ coro);
964	SPAGAIN;
965
966	destroy_stacks (aTHX);
967
968	LOAD((&temp)); /* this will get rid of defsv etc.. */
969	SPAGAIN;
970
971	coro->mainstack = 0;
972	}
973
974	deallocate_stack (coro);
975
976	Safefree (coro);
977
978	void
979	flush()
980	CODE:
981	#ifdef MAY_FLUSH
982	flush_padlist_cache ();
983	#endif
984
985	void
986	_exit(code)	1223	_exit (code)
987	int code	1224	int code
988	PROTOTYPE: $	1225	PROTOTYPE: $
989	CODE:	1226	CODE:
990	#if defined(__GLIBC__) || _POSIX_C_SOURCE
991	_exit (code);	1227	_exit (code);
992	#else
993	signal (SIGTERM, SIG_DFL);
994	raise (SIGTERM);
995	exit (code);
996	#endif
997		1228
998	MODULE = Coro::State PACKAGE = Coro::Cont	1229	int
		1230	cctx_count ()
		1231	CODE:
		1232	RETVAL = cctx_count;
		1233	OUTPUT:
		1234	RETVAL
999		1235
1000	# this is slightly dirty (should expose a c-level api)	1236	int
1001		1237	cctx_idle ()
1002	void	1238	CODE:
1003	yield(...)	1239	RETVAL = cctx_idle;
1004	PROTOTYPE: @	1240	OUTPUT:
1005	CODE:	1241	RETVAL
1006	static SV *returnstk;
1007	SV *sv;
1008	AV *defav = GvAV (PL_defgv);
1009	struct coro *prev, *next;
1010
1011	if (!returnstk)
1012	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014	/* set up @_ -- ugly */
1015	av_clear (defav);
1016	av_fill (defav, items - 1);
1017	while (items--)
1018	av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021	sv = av_pop ((AV *)SvRV (returnstk));
1022	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024	SvREFCNT_dec (sv);
1025
1026	transfer(aTHX_ prev, next, 0);
1027		1242
1028	MODULE = Coro::State PACKAGE = Coro	1243	MODULE = Coro::State PACKAGE = Coro
1029		1244
1030	# this is slightly dirty (should expose a c-level api)
1031
1032	BOOT:	1245	BOOT:
1033	{	1246	{
1034	int i;	1247	int i;
		1248
1035	HV *stash = gv_stashpv ("Coro", TRUE);	1249	coro_stash = gv_stashpv ("Coro", TRUE);
1036		1250
1037	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1251	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1252	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1253	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1254	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1255	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1256	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043		1257
1044	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1258	coro_current = get_sv ("Coro::current", FALSE);
1045	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1259	SvREADONLY_on (coro_current);
1046		1260
1047	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1261	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048	coro_ready[i] = newAV ();	1262	coro_ready[i] = newAV ();
1049		1263
1050	{	1264	{
1051	SV *sv = perl_get_sv("Coro::API", 1);	1265	SV *sv = perl_get_sv("Coro::API", 1);
1052		1266
1053	coroapi.schedule = api_schedule;	1267	coroapi.schedule = api_schedule;
		1268	coroapi.save = api_save;
1054	coroapi.cede = api_cede;	1269	coroapi.cede = api_cede;
		1270	coroapi.cede_notself = api_cede_notself;
1055	coroapi.ready = api_ready;	1271	coroapi.ready = api_ready;
		1272	coroapi.is_ready = api_is_ready;
1056	coroapi.nready = &coro_nready;	1273	coroapi.nready = &coro_nready;
1057	coroapi.current = coro_current;	1274	coroapi.current = coro_current;
1058		1275
1059	GCoroAPI = &coroapi;	1276	GCoroAPI = &coroapi;
1060	sv_setiv(sv, (IV)&coroapi);	1277	sv_setiv (sv, (IV)&coroapi);
1061	SvREADONLY_on(sv);	1278	SvREADONLY_on (sv);
1062	}	1279	}
1063	}	1280	}
1064		1281
1065	void	1282	void
1066	ready(self)	1283	_set_current (SV *current)
1067	SV * self
1068	PROTOTYPE: $	1284	PROTOTYPE: $
1069	CODE:	1285	CODE:
1070	api_ready (self);	1286	SvREFCNT_dec (SvRV (coro_current));
		1287	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1071		1288
1072	int	1289	int
		1290	prio (Coro::State coro, int newprio = 0)
		1291	ALIAS:
		1292	nice = 1
		1293	CODE:
		1294	{
		1295	RETVAL = coro->prio;
		1296
		1297	if (items > 1)
		1298	{
		1299	if (ix)
		1300	newprio = coro->prio - newprio;
		1301
		1302	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1303	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1304
		1305	coro->prio = newprio;
		1306	}
		1307	}
		1308	OUTPUT:
		1309	RETVAL
		1310
		1311	SV *
		1312	ready (SV *self)
		1313	PROTOTYPE: $
		1314	CODE:
		1315	RETVAL = boolSV (api_ready (self));
		1316	OUTPUT:
		1317	RETVAL
		1318
		1319	SV *
		1320	is_ready (SV *self)
		1321	PROTOTYPE: $
		1322	CODE:
		1323	RETVAL = boolSV (api_is_ready (self));
		1324	OUTPUT:
		1325	RETVAL
		1326
		1327	int
1073	nready(...)	1328	nready (...)
1074	PROTOTYPE:	1329	PROTOTYPE:
1075	CODE:	1330	CODE:
1076	RETVAL = coro_nready;	1331	RETVAL = coro_nready;
1077	OUTPUT:	1332	OUTPUT:
1078	RETVAL	1333	RETVAL
1079		1334
		1335	MODULE = Coro::State PACKAGE = Coro::AIO
		1336
		1337	SV *
		1338	_get_state ()
		1339	CODE:
		1340	{
		1341	struct io_state *data;
		1342
		1343	RETVAL = newSV (sizeof (struct io_state));
		1344	data = (struct io_state *)SvPVX (RETVAL);
		1345	SvCUR_set (RETVAL, sizeof (struct io_state));
		1346	SvPOK_only (RETVAL);
		1347
		1348	data->errorno = errno;
		1349	data->laststype = PL_laststype;
		1350	data->laststatval = PL_laststatval;
		1351	data->statcache = PL_statcache;
		1352	}
		1353	OUTPUT:
		1354	RETVAL
		1355
1080	void	1356	void
1081	schedule(...)	1357	_set_state (char *data_)
1082	PROTOTYPE:	1358	PROTOTYPE: $
1083	CODE:	1359	CODE:
1084	api_schedule ();	1360	{
		1361	struct io_state *data = (void *)data_;
1085		1362
1086	void	1363	errno = data->errorno;
1087	cede(...)	1364	PL_laststype = data->laststype;
1088	PROTOTYPE:	1365	PL_laststatval = data->laststatval;
1089	CODE:	1366	PL_statcache = data->statcache;
1090	api_cede ();	1367	}
1091		1368

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