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Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs.
Revision 1.132 by root, Fri Dec 29 13:03:05 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PATCHLEVEL < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
14	# endif	52	# endif
15	# ifndef call_sv	53	# ifndef call_sv
16	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
29	# endif	67	# endif
30	#endif	68	#endif
31		69
32	#include <signal.h>	70	/* 5.8.7 */
33		71	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	72	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	73	#endif
44	#endif
45		74
46	#define SUB_INIT "Coro::State::initialize"	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#define UCORO_STATE "_coro_state"	76	# undef STACKGUARD
		77	#endif
		78
		79	#ifndef STACKGUARD
		80	# define STACKGUARD 0
		81	#endif
		82
		83	/* prefer perl internal functions over our own? */
		84	#ifndef PREFER_PERL_FUNCTIONS
		85	# define PREFER_PERL_FUNCTIONS 0
		86	#endif
48		87
49	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
53		93
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		95
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		99	#else
		100	# define attribute(x)
		101	# define BARRIER
		102	#endif
		103
		104	#define NOINLINE attribute ((noinline))
57		105
58	#include "CoroAPI.h"	106	#include "CoroAPI.h"
59		107
60	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	112	#else
65	# define LOCK 0	113	# define LOCK (void)0
66	# define UNLOCK 0	114	# define UNLOCK (void)0
67	#endif	115	#endif
		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
68		124
69	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	126	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	127	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	128	static SV *coro_mortal; /* will be freed after next transfer */
75		129
76	/* 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 */
77	typedef struct {	134	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	135	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		136
82	coro_context cctx;	137	/* the stack */
83
84	void *sptr;	138	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		140
		141	/* cpu state */
		142	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		143	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		144	JMPENV *top_env;
		145	coro_context cctx;
		146
		147	int inuse;
		148
		149	#if USE_VALGRIND
		150	int valgrind_id;
		151	#endif
		152	} coro_cctx;
		153
		154	enum {
		155	CF_RUNNING = 0x0001, /* coroutine is running */
		156	CF_READY = 0x0002, /* coroutine is ready */
		157	CF_NEW = 0x0004, /* ahs never been switched to */
		158	};
		159
		160	/* this is a structure representing a perl-level coroutine */
88	struct coro {	161	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	162	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	163	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	COP *curcop;
134	JMPENV *top_env;
135		164
136	/* data associated with this coroutine (initial args) */	165	/* data associated with this coroutine (initial args) */
137	AV *args;	166	AV *args;
		167	int refcnt;
		168	int save; /* CORO_SAVE flags */
		169	int flags; /* CF_ flags */
		170
		171	/* optionally saved, might be zero */
		172	AV *defav; /* @_ */
		173	SV *defsv; /* $_ */
		174	SV *errsv; /* $@ */
		175	SV *irssv; /* $/ */
		176	SV *irssv_sv; /* real $/ cache */
		177
		178	#define VAR(name,type) type name;
		179	# include "state.h"
		180	#undef VAR
		181
		182	/* coro process data */
		183	int prio;
138	};	184	};
139		185
140	typedef struct coro *Coro__State;	186	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	187	typedef struct coro *Coro__State_or_hashref;
142		188
143	/* mostly copied from op.c:cv_clone2 */	189	static AV *
144	STATIC AV *	190	coro_clone_padlist (CV *cv)
145	clone_padlist (pTHX_ AV *protopadlist)
146	{	191	{
147	AV *av;	192	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV *newpadlist, *newpad_name, *newpad;	193	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		194
166	newpadlist = newAV ();	195	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	196	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	197	#if PERL_VERSION_ATLEAST (5,9,0)
		198	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		199	#else
		200	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		201	#endif
		202	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		203	--AvFILLp (padlist);
		204
		205	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	206	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		207
240	return newpadlist;	208	return newpadlist;
241	}	209	}
242		210
243	STATIC void	211	static void
244	free_padlist (pTHX_ AV *padlist)	212	free_padlist (AV *padlist)
245	{	213	{
246	/* may be during global destruction */	214	/* may be during global destruction */
247	if (SvREFCNT (padlist))	215	if (SvREFCNT (padlist))
248	{	216	{
249	I32 i = AvFILLp (padlist);	217	I32 i = AvFILLp (padlist);
…		…
262		230
263	SvREFCNT_dec ((SV*)padlist);	231	SvREFCNT_dec ((SV*)padlist);
264	}	232	}
265	}	233	}
266		234
267	STATIC int	235	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	236	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	237	{
270	AV *padlist;	238	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	239	AV *av = (AV *)mg->mg_obj;
272		240
273	/* casting is fun. */	241	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	242	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	243	free_padlist (padlist);
276		244
277	SvREFCNT_dec (av);	245	SvREFCNT_dec (av);
		246
		247	return 0;
278	}	248	}
279		249
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	250	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		251
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	252	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		253
		254	#define CORO_MAGIC(cv) \
		255	SvMAGIC (cv) \
		256	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		257	? SvMAGIC (cv) \
		258	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		259	: 0
		260
284	/* the next two functions merely cache the padlists */	261	/* the next two functions merely cache the padlists */
285	STATIC void	262	static void
286	get_padlist (pTHX_ CV *cv)	263	get_padlist (CV *cv)
287	{	264	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	265	MAGIC *mg = CORO_MAGIC (cv);
		266	AV *av;
289		267
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	268	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	269	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	else	270	else
		271	{
		272	#if PREFER_PERL_FUNCTIONS
		273	/* this is probably cleaner, but also slower? */
		274	CV *cp = Perl_cv_clone (cv);
		275	CvPADLIST (cv) = CvPADLIST (cp);
		276	CvPADLIST (cp) = 0;
		277	SvREFCNT_dec (cp);
		278	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	279	CvPADLIST (cv) = coro_clone_padlist (cv);
		280	#endif
		281	}
294	}	282	}
295		283
296	STATIC void	284	static void
297	put_padlist (pTHX_ CV *cv)	285	put_padlist (CV *cv)
298	{	286	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	287	MAGIC *mg = CORO_MAGIC (cv);
		288	AV *av;
300		289
301	if (!mg)	290	if (!mg)
302	{	291	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	292	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	293	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	294	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	295	mg->mg_obj = (SV *)newAV ();
307	}	296	}
308		297
309	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	298	av = (AV *)mg->mg_obj;
		299
		300	if (AvFILLp (av) >= AvMAX (av))
		301	av_extend (av, AvMAX (av) + 1);
		302
		303	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
310	}	304	}
311		305
312	#define SB do {	306	#define SB do {
313	#define SE } while (0)	307	#define SE } while (0)
314		308
315	#define LOAD(state) load_state(aTHX_ (state));
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
317
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	309	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
319		310
320	static void	311	static void
321	load_state(pTHX_ Coro__State c)	312	load_perl (Coro__State c)
322	{	313	{
323	PL_dowarn = c->dowarn;	314	#define VAR(name,type) PL_ ## name = c->name;
324	PL_in_eval = c->in_eval;	315	# include "state.h"
325		316	#undef VAR
326	PL_curstackinfo = c->curstackinfo;
327	PL_curstack = c->curstack;
328	PL_mainstack = c->mainstack;
329	PL_stack_sp = c->stack_sp;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		317
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		321	if (c->irssv)
		322	{
		323	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		324	SvREFCNT_dec (c->irssv);
		325	else
		326	{
		327	REPLACE_SV (PL_rs, c->irssv);
		328	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		329	sv_setsv (c->irssv_sv, PL_rs);
		330	}
		331	}
358		332
359	{	333	{
360	dSP;	334	dSP;
361	CV *cv;	335	CV *cv;
362		336
363	/* now do the ugly restore mess */	337	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	338	while ((cv = (CV *)POPs))
365	{	339	{
366	AV *padlist = (AV *)POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	340	put_padlist (cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	341	CvDEPTH (cv) = PTR2IV (POPs);
372	}	342	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	343	}
376		344
377	PUTBACK;	345	PUTBACK;
378	}	346	}
379	}	347	}
380		348
381	static void	349	static void
382	save_state(pTHX_ Coro__State c, int flags)	350	save_perl (Coro__State c)
383	{	351	{
384	{	352	{
385	dSP;	353	dSP;
386	I32 cxix = cxstack_ix;	354	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	355	PERL_CONTEXT *ccstk = cxstack;
…		…
390	/*	358	/*
391	* the worst thing you can imagine happens first - we have to save	359	* the worst thing you can imagine happens first - we have to save
392	* (and reinitialize) all cv's in the whole callchain :(	360	* (and reinitialize) all cv's in the whole callchain :(
393	*/	361	*/
394		362
		363	EXTEND (SP, 3 + 1);
395	PUSHs (Nullsv);	364	PUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	365	/* this loop was inspired by pp_caller */
397	for (;;)	366	for (;;)
398	{	367	{
399	while (cxix >= 0)	368	while (cxix >= 0)
400	{	369	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	370	PERL_CONTEXT *cx = &ccstk[cxix--];
402		371
403	if (CxTYPE(cx) == CXt_SUB)	372	if (CxTYPE (cx) == CXt_SUB)
404	{	373	{
405	CV *cv = cx->blk_sub.cv;	374	CV *cv = cx->blk_sub.cv;
		375
406	if (CvDEPTH(cv))	376	if (CvDEPTH (cv))
407	{	377	{
408	EXTEND (SP, CvDEPTH(cv)*2);	378	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	379	PUSHs ((SV *)CvPADLIST (cv));
		380	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
419		382
420	get_padlist (aTHX_ cv); /* this is a monster */	383	CvDEPTH (cv) = 0;
		384	get_padlist (cv);
421	}	385	}
422	}	386	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	387	}
432		388
433	if (top_si->si_type == PERLSI_MAIN)	389	if (top_si->si_type == PERLSI_MAIN)
434	break;	390	break;
435		391
…		…
439	}	395	}
440		396
441	PUTBACK;	397	PUTBACK;
442	}	398	}
443		399
444	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
446	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		403	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
447		404
448	c->dowarn = PL_dowarn;	405	#define VAR(name,type)c->name = PL_ ## name;
449	c->in_eval = PL_in_eval;	406	# include "state.h"
450		407	#undef VAR
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;
455	c->op = PL_op;
456	c->curpad = PL_curpad;
457	c->comppad = PL_comppad;
458	c->compcv = PL_compcv;
459	c->stack_base = PL_stack_base;
460	c->stack_max = PL_stack_max;
461	c->tmps_stack = PL_tmps_stack;
462	c->tmps_floor = PL_tmps_floor;
463	c->tmps_ix = PL_tmps_ix;
464	c->tmps_max = PL_tmps_max;
465	c->markstack = PL_markstack;
466	c->markstack_ptr = PL_markstack_ptr;
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	408	}
480		409
481	/*	410	/*
482	* allocate various perl stacks. This is an exact copy	411	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	412	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	413	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	414	* not usually need a lot of stackspace.
486	*/	415	*/
487	STATIC void	416	#if PREFER_PERL_FUNCTIONS
		417	# define coro_init_stacks init_stacks
		418	#else
		419	static void
488	coro_init_stacks (pTHX)	420	coro_init_stacks ()
489	{	421	{
490	LOCK;
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	422	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
493	PL_curstackinfo->si_type = PERLSI_MAIN;	423	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	424	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	425	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		426
497	PL_stack_base = AvARRAY(PL_curstack);	427	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	428	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	429	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		430
501	New(50,PL_tmps_stack,96,SV*);	431	New(50,PL_tmps_stack,128,SV*);
502	PL_tmps_floor = -1;	432	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	433	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	434	PL_tmps_max = 128;
505		435
506	New(54,PL_markstack,16,I32);	436	New(54,PL_markstack,32,I32);
507	PL_markstack_ptr = PL_markstack;	437	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	438	PL_markstack_max = PL_markstack + 32;
509		439
510	#ifdef SET_MARK_OFFSET	440	#ifdef SET_MARK_OFFSET
511	SET_MARK_OFFSET;	441	SET_MARK_OFFSET;
512	#endif	442	#endif
513		443
514	New(54,PL_scopestack,16,I32);	444	New(54,PL_scopestack,32,I32);
515	PL_scopestack_ix = 0;	445	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	446	PL_scopestack_max = 32;
517		447
518	New(54,PL_savestack,96,ANY);	448	New(54,PL_savestack,64,ANY);
519	PL_savestack_ix = 0;	449	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	450	PL_savestack_max = 64;
521		451
		452	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	453	New(54,PL_retstack,16,OP*);
523	PL_retstack_ix = 0;	454	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	455	PL_retstack_max = 16;
525		456	#endif
526	UNLOCK;
527	}	457	}
		458	#endif
528		459
529	/*	460	/*
530	* destroy the stacks, the callchain etc...	461	* destroy the stacks, the callchain etc...
531	*/	462	*/
532	STATIC void	463	static void
533	destroy_stacks(pTHX)	464	coro_destroy_stacks ()
534	{	465	{
535	if (!IN_DESTRUCT)	466	if (!IN_DESTRUCT)
536	{	467	{
537	/* is this ugly, I ask? */	468	/* restore all saved variables and stuff */
538	LEAVE_SCOPE (0);	469	LEAVE_SCOPE (0);
		470	assert (PL_tmps_floor == -1);
539		471
540	/* sure it is, but more important: is it correct?? :/ */	472	/* free all temporaries */
541	FREETMPS;	473	FREETMPS;
		474	assert (PL_tmps_ix == -1);
542		475
543	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	476	POPSTACK_TO (PL_mainstack);
544	}	477	}
545		478
546	while (PL_curstackinfo->si_next)	479	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	480	PL_curstackinfo = PL_curstackinfo->si_next;
548		481
549	while (PL_curstackinfo)	482	while (PL_curstackinfo)
550	{	483	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	484	PERL_SI *p = PL_curstackinfo->si_prev;
552		485
553	{ /*D*//*remove*/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	486	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/*D*//*remove*/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	487	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		488
565	Safefree (PL_curstackinfo->si_cxstack);	489	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	490	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	491	PL_curstackinfo = p;
568	}	492	}
569		493
570	Safefree (PL_tmps_stack);	494	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	495	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	496	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	497	Safefree (PL_savestack);
		498	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	499	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	500	#endif
595	{
596	/*FIXME*//*D*//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}	501	}
606		502
607	static void	503	static void
608	deallocate_stack (Coro__State ctx)	504	setup_coro (struct coro *coro)
609	{
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void
633	setup_coro (void *arg)
634	{	505	{
635	/*	506	/*
636	* emulate part of the perl startup here.	507	* emulate part of the perl startup here.
637	*/	508	*/
638	dTHX;	509
		510	coro_init_stacks ();
		511
		512	PL_curcop = &PL_compiling;
		513	PL_in_eval = EVAL_NULL;
		514	PL_curpm = 0;
		515	PL_localizing = 0;
		516	PL_dirty = 0;
		517	PL_restartop = 0;
		518
		519	{
		520	dSP;
		521	LOGOP myop;
		522
		523	SvREFCNT_dec (GvAV (PL_defgv));
		524	GvAV (PL_defgv) = coro->args; coro->args = 0;
		525
		526	Zero (&myop, 1, LOGOP);
		527	myop.op_next = Nullop;
		528	myop.op_flags = OPf_WANT_VOID;
		529
		530	PUSHMARK (SP);
		531	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		532	PUTBACK;
		533	PL_op = (OP *)&myop;
		534	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		535	SPAGAIN;
		536	}
		537
		538	ENTER; /* necessary e.g. for dounwind */
		539	}
		540
		541	static void
		542	free_coro_mortal ()
		543	{
		544	if (coro_mortal)
		545	{
		546	SvREFCNT_dec (coro_mortal);
		547	coro_mortal = 0;
		548	}
		549	}
		550
		551	/* inject a fake call to Coro::State::_cctx_init into the execution */
		552	static void NOINLINE
		553	prepare_cctx (coro_cctx *cctx)
		554	{
639	dSP;	555	dSP;
640	Coro__State ctx = (Coro__State)arg;	556	LOGOP myop;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		557
643	coro_init_stacks (aTHX);	558	Zero (&myop, 1, LOGOP);
644	/*PL_curcop = 0;*/	559	myop.op_next = PL_op;
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */	560	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
646	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648		561
		562	PUSHMARK (SP);
		563	EXTEND (SP, 2);
		564	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		565	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		566	PUTBACK;
		567	PL_op = (OP *)&myop;
		568	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;	569	SPAGAIN;
650
651	if (ctx->stack)
652	{
653	ctx->cursp = 0;
654
655	PUSHMARK(SP);
656	PUTBACK;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659	if (SvTRUE (ERRSV))
660	croak (NULL);
661	else
662	croak ("FATAL: CCTXT coroutine returned!");
663	}
664	else
665	{
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}
689	}	570	}
690		571
691	static void	572	static void
692	continue_coro (void *arg)	573	coro_run (void *arg)
693	{	574	{
		575	/* coro_run is the alternative tail of transfer(), so unlock here. */
		576	UNLOCK;
		577
694	/*	578	/*
695	* this is a _very_ stripped down perl interpreter ;)	579	* this is a _very_ stripped down perl interpreter ;)
696	*/	580	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700
701	PL_top_env = &ctx->start_env;	581	PL_top_env = &PL_start_env;
702		582
703	ctx->cursp = 0;	583	/* inject call to cctx_init */
704	PL_op = PL_op->op_next;	584	prepare_cctx ((coro_cctx *)arg);
705	CALLRUNOPS(aTHX);
706		585
		586	/* somebody will hit me for both perl_run and PL_restartop */
		587	PL_restartop = PL_op;
		588	perl_run (PL_curinterp);
		589
		590	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
707	abort ();	591	abort ();
708	}	592	}
709		593
710	STATIC void	594	static coro_cctx *
		595	cctx_new ()
		596	{
		597	coro_cctx *cctx;
		598
		599	++cctx_count;
		600
		601	Newz (0, cctx, 1, coro_cctx);
		602
		603	#if HAVE_MMAP
		604
		605	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		606	/* mmap supposedly does allocate-on-write for us */
		607	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		608
		609	if (cctx->sptr == (void *)-1)
		610	{
		611	perror ("FATAL: unable to mmap stack for coroutine");
		612	_exit (EXIT_FAILURE);
		613	}
		614
		615	# if STACKGUARD
		616	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		617	# endif
		618
		619	#else
		620
		621	cctx->ssize = STACKSIZE * (long)sizeof (long);
		622	New (0, cctx->sptr, STACKSIZE, long);
		623
		624	if (!cctx->sptr)
		625	{
		626	perror ("FATAL: unable to malloc stack for coroutine");
		627	_exit (EXIT_FAILURE);
		628	}
		629
		630	#endif
		631
		632	#if USE_VALGRIND
		633	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		634	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		635	cctx->ssize + (char *)cctx->sptr
		636	);
		637	#endif
		638
		639	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		640
		641	return cctx;
		642	}
		643
		644	static void
		645	cctx_destroy (coro_cctx *cctx)
		646	{
		647	if (!cctx)
		648	return;
		649
		650	--cctx_count;
		651
		652	#if USE_VALGRIND
		653	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		654	#endif
		655
		656	#if HAVE_MMAP
		657	munmap (cctx->sptr, cctx->ssize);
		658	#else
		659	Safefree (cctx->sptr);
		660	#endif
		661
		662	Safefree (cctx);
		663	}
		664
		665	static coro_cctx *
		666	cctx_get ()
		667	{
		668	coro_cctx *cctx;
		669
		670	if (cctx_first)
		671	{
		672	cctx = cctx_first;
		673	cctx_first = cctx->next;
		674	--cctx_idle;
		675	}
		676	else
		677	{
		678	cctx = cctx_new ();
		679	PL_op = PL_op->op_next;
		680	}
		681
		682	return cctx;
		683	}
		684
		685	static void
		686	cctx_put (coro_cctx *cctx)
		687	{
		688	/* free another cctx if overlimit */
		689	if (cctx_idle >= MAX_IDLE_CCTX)
		690	{
		691	coro_cctx *first = cctx_first;
		692	cctx_first = first->next;
		693	--cctx_idle;
		694
		695	assert (!first->inuse);
		696	cctx_destroy (first);
		697	}
		698
		699	++cctx_idle;
		700	cctx->next = cctx_first;
		701	cctx_first = cctx;
		702	}
		703
		704	/* never call directly, always through the coro_state_transfer global variable */
		705	static void NOINLINE
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	706	transfer (struct coro *prev, struct coro *next)
712	{	707	{
713	dSTACKLEVEL;	708	dSTACKLEVEL;
714		709
		710	/* sometimes transfer is only called to set idle_sp */
		711	if (!next)
		712	{
		713	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		714	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		715	}
715	if (prev != next)	716	else if (prev != next)
716	{	717	{
717	if (next->mainstack)	718	coro_cctx *prev__cctx;
		719
		720	if (prev->flags & CF_NEW)
718	{	721	{
719	LOCK;	722	/* create a new empty context */
720	SAVE (prev, flags);	723	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	724	prev->cctx->inuse = 1;
722	UNLOCK;	725	prev->flags &= ~CF_NEW;
723		726	prev->flags |= CF_RUNNING;
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}	727	}
757	else if (next->tmps_ix == -2)	728
758	croak ("tried to transfer to running coroutine");	729	/*TODO: must not croak here */
		730	if (!prev->flags & CF_RUNNING)
		731	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		732
		733	if (next->flags & CF_RUNNING)
		734	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		735
		736	prev->flags &= ~CF_RUNNING;
		737	next->flags |= CF_RUNNING;
		738
		739	LOCK;
		740
		741	if (next->flags & CF_NEW)
		742	{
		743	/* need to start coroutine */
		744	next->flags &= ~CF_NEW;
		745	/* first get rid of the old state */
		746	save_perl (prev);
		747	/* setup coroutine call */
		748	setup_coro (next);
		749	/* need a new stack */
		750	assert (!next->cctx);
		751	}
759	else	752	else
760	{	753	{
761	LOCK;	754	/* coroutine already started */
762	SAVE (prev, -1); /* first get rid of the old state */	755	save_perl (prev);
763	UNLOCK;	756	load_perl (next);
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}	757	}
800	}
801		758
802	LOCK;	759	prev__cctx = prev->cctx;
803	if (coro_mortal)	760
804	{	761	/* possibly "free" the cctx */
805	SvREFCNT_dec (coro_mortal);	762	if (prev__cctx->idle_sp == STACKLEVEL)
		763	{
		764	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		765	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		766
		767	prev->cctx = 0;
		768
		769	cctx_put (prev__cctx);
		770	prev__cctx->inuse = 0;
		771	}
		772
		773	if (!next->cctx)
		774	{
		775	next->cctx = cctx_get ();
		776	assert (!next->cctx->inuse);
		777	next->cctx->inuse = 1;
		778	}
		779
		780	if (prev__cctx != next->cctx)
		781	{
		782	prev__cctx->top_env = PL_top_env;
		783	PL_top_env = next->cctx->top_env;
		784	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		785	}
		786
806	coro_mortal = 0;	787	free_coro_mortal ();
807	}	788
808	UNLOCK;	789	UNLOCK;
		790	}
809	}	791	}
810		792
811	#define SV_CORO(sv,func) \	793	struct transfer_args
812	do { \	794	{
813	if (SvROK (sv)) \	795	struct coro *prev, *next;
814	sv = SvRV (sv); \	796	};
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		797
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	798	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
833		799
		800	static void
		801	coro_state_destroy (struct coro *coro)
		802	{
		803	if (coro->refcnt--)
		804	return;
		805
		806	if (coro->mainstack && coro->mainstack != main_mainstack)
		807	{
		808	struct coro temp;
		809	Zero (&temp, 1, struct coro);
		810	temp.save = CORO_SAVE_ALL;
		811
		812	if (coro->flags & CF_RUNNING)
		813	croak ("FATAL: tried to destroy currently running coroutine");
		814
		815	save_perl (&temp);
		816	load_perl (coro);
		817
		818	coro_destroy_stacks ();
		819
		820	load_perl (&temp); /* this will get rid of defsv etc.. */
		821
		822	coro->mainstack = 0;
		823	}
		824
		825	cctx_destroy (coro->cctx);
		826	SvREFCNT_dec (coro->args);
		827	Safefree (coro);
		828	}
		829
834	static void	830	static int
		831	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		832	{
		833	struct coro *coro = (struct coro *)mg->mg_ptr;
		834	mg->mg_ptr = 0;
		835
		836	coro_state_destroy (coro);
		837
		838	return 0;
		839	}
		840
		841	static int
		842	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		843	{
		844	struct coro *coro = (struct coro *)mg->mg_ptr;
		845
		846	++coro->refcnt;
		847
		848	return 0;
		849	}
		850
		851	static MGVTBL coro_state_vtbl = {
		852	0, 0, 0, 0,
		853	coro_state_clear,
		854	0,
		855	#ifdef MGf_DUP
		856	coro_state_dup,
		857	#else
		858	# define MGf_DUP 0
		859	#endif
		860	};
		861
		862	static struct coro *
		863	SvSTATE (SV *coro)
		864	{
		865	HV *stash;
		866	MAGIC *mg;
		867
		868	if (SvROK (coro))
		869	coro = SvRV (coro);
		870
		871	stash = SvSTASH (coro);
		872	if (stash != coro_stash && stash != coro_state_stash)
		873	{
		874	/* very slow, but rare, check */
		875	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		876	croak ("Coro::State object required");
		877	}
		878
		879	mg = SvMAGIC (coro);
		880	assert (mg->mg_type == PERL_MAGIC_ext);
		881	return (struct coro *)mg->mg_ptr;
		882	}
		883
		884	static void
		885	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		886	{
		887	ta->prev = SvSTATE (prev_sv);
		888	ta->next = SvSTATE (next_sv);
		889	}
		890
		891	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	892	api_transfer (SV *prev_sv, SV *next_sv)
836	{	893	{
837	SV_CORO (prev, "Coro::transfer");	894	struct transfer_args ta;
838	SV_CORO (next, "Coro::transfer");
839		895
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	896	prepare_transfer (&ta, prev_sv, next_sv);
		897	TRANSFER (ta);
		898	}
		899
		900	static int
		901	api_save (SV *coro_sv, int new_save)
		902	{
		903	struct coro *coro = SvSTATE (coro_sv);
		904	int old_save = coro->save;
		905
		906	if (new_save >= 0)
		907	coro->save = new_save;
		908
		909	return old_save;
841	}	910	}
842		911
843	/** Coro ********************************************************************/	912	/** Coro ********************************************************************/
844		913
845	#define PRIO_MAX 3	914	#define PRIO_MAX 3
…		…
848	#define PRIO_LOW -1	917	#define PRIO_LOW -1
849	#define PRIO_IDLE -3	918	#define PRIO_IDLE -3
850	#define PRIO_MIN -4	919	#define PRIO_MIN -4
851		920
852	/* for Coro.pm */	921	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;	922	static SV *coro_current;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	923	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;	924	static int coro_nready;
856		925
857	static void	926	static void
858	coro_enq (pTHX_ SV *sv)	927	coro_enq (SV *coro_sv)
859	{	928	{
860	if (SvTYPE (sv) == SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);	929	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870	coro_nready++;	930	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}	931	}
877		932
878	static SV *	933	static SV *
879	coro_deq (pTHX_ int min_prio)	934	coro_deq (int min_prio)
880	{	935	{
881	int prio = PRIO_MAX - PRIO_MIN;	936	int prio = PRIO_MAX - PRIO_MIN;
882		937
883	min_prio -= PRIO_MIN;	938	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	939	if (min_prio < 0)
885	min_prio = 0;	940	min_prio = 0;
886		941
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	942	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	943	if (AvFILLp (coro_ready [prio]) >= 0)
889	{	944	{
890	coro_nready--;	945	coro_nready--;
891	return av_shift (coro_ready[prio]);	946	return av_shift (coro_ready [prio]);
892	}	947	}
893		948
894	return 0;	949	return 0;
895	}	950	}
896		951
897	static void	952	static int
898	api_ready (SV *coro)	953	api_ready (SV *coro_sv)
899	{	954	{
900	dTHX;	955	struct coro *coro;
901		956
902	if (SvROK (coro))	957	if (SvROK (coro_sv))
903	coro = SvRV (coro);	958	coro_sv = SvRV (coro_sv);
		959
		960	coro = SvSTATE (coro_sv);
		961
		962	if (coro->flags & CF_READY)
		963	return 0;
		964
		965	coro->flags |= CF_READY;
904		966
905	LOCK;	967	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	968	coro_enq (SvREFCNT_inc (coro_sv));
907	UNLOCK;	969	UNLOCK;
		970
		971	return 1;
		972	}
		973
		974	static int
		975	api_is_ready (SV *coro_sv)
		976	{
		977	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		978	}
		979
		980	static void
		981	prepare_schedule (struct transfer_args *ta)
		982	{
		983	SV *prev, *next;
		984
		985	for (;;)
		986	{
		987	LOCK;
		988	next = coro_deq (PRIO_MIN);
		989	UNLOCK;
		990
		991	if (next)
		992	break;
		993
		994	{
		995	dSP;
		996
		997	ENTER;
		998	SAVETMPS;
		999
		1000	PUSHMARK (SP);
		1001	PUTBACK;
		1002	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1003
		1004	FREETMPS;
		1005	LEAVE;
		1006	}
		1007	}
		1008
		1009	prev = SvRV (coro_current);
		1010	SvRV_set (coro_current, next);
		1011
		1012	/* free this only after the transfer */
		1013	LOCK;
		1014	free_coro_mortal ();
		1015	UNLOCK;
		1016	coro_mortal = prev;
		1017
		1018	assert (!SvROK(prev));//D
		1019	assert (!SvROK(next));//D
		1020
		1021	ta->prev = SvSTATE (prev);
		1022	ta->next = SvSTATE (next);
		1023
		1024	assert (ta->next->flags & CF_READY);
		1025	ta->next->flags &= ~CF_READY;
		1026	}
		1027
		1028	static void
		1029	prepare_cede (struct transfer_args *ta)
		1030	{
		1031	api_ready (coro_current);
		1032	prepare_schedule (ta);
		1033	}
		1034
		1035	static int
		1036	prepare_cede_notself (struct transfer_args *ta)
		1037	{
		1038	if (coro_nready)
		1039	{
		1040	SV *prev = SvRV (coro_current);
		1041	prepare_schedule (ta);
		1042	api_ready (prev);
		1043	return 1;
		1044	}
		1045	else
		1046	return 0;
908	}	1047	}
909		1048
910	static void	1049	static void
911	api_schedule (void)	1050	api_schedule (void)
912	{	1051	{
913	dTHX;	1052	struct transfer_args ta;
914		1053
915	SV *prev, *next;	1054	prepare_schedule (&ta);
916		1055	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1056	}
938		1057
939	static void	1058	static int
940	api_cede (void)	1059	api_cede (void)
941	{	1060	{
942	dTHX;	1061	struct transfer_args ta;
943		1062
944	LOCK;	1063	prepare_cede (&ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1064
948	api_schedule ();	1065	if (ta.prev != ta.next)
		1066	{
		1067	TRANSFER (ta);
		1068	return 1;
		1069	}
		1070	else
		1071	return 0;
		1072	}
		1073
		1074	static int
		1075	api_cede_notself (void)
		1076	{
		1077	struct transfer_args ta;
		1078
		1079	if (prepare_cede_notself (&ta))
		1080	{
		1081	TRANSFER (ta);
		1082	return 1;
		1083	}
		1084	else
		1085	return 0;
949	}	1086	}
950		1087
951	MODULE = Coro::State PACKAGE = Coro::State	1088	MODULE = Coro::State PACKAGE = Coro::State
952		1089
953	PROTOTYPES: ENABLE	1090	PROTOTYPES: DISABLE
954		1091
955	BOOT:	1092	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1093	{
957	#ifdef USE_ITHREADS	1094	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1095	MUTEX_INIT (&coro_mutex);
959	#endif	1096	#endif
		1097	BOOT_PAGESIZE;
960		1098
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1099	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1100
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1101	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1102	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1103	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1104	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1105	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
969		1106
970	main_mainstack = PL_mainstack;	1107	main_mainstack = PL_mainstack;
971		1108
972	coroapi.ver = CORO_API_VERSION;	1109	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1110	coroapi.transfer = api_transfer;
974	}
975		1111
976	Coro::State	1112	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1113	}
978	SV * args	1114
979	PROTOTYPE: $	1115	SV *
		1116	new (char *klass, ...)
980	CODE:	1117	CODE:
981	Coro__State coro;	1118	{
		1119	struct coro *coro;
		1120	HV *hv;
		1121	int i;
982		1122
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1123	Newz (0, coro, 1, struct coro);
		1124	coro->args = newAV ();
		1125	coro->save = CORO_SAVE_ALL;
		1126	coro->flags = CF_NEW;
987		1127
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1128	hv = newHV ();
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1129	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
990	/*coro->stack = 0;*/	1130	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991		1131
992	/* same as JMPENV_BOOTSTRAP */	1132	for (i = 1; i < items; i++)
993	/* we might be able to recycle start_env, but safe is safe */	1133	av_push (coro->args, newSVsv (ST (i)));
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1134	}
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997
998	RETVAL = coro;
999	OUTPUT:	1135	OUTPUT:
1000	RETVAL	1136	RETVAL
1001		1137
		1138	int
		1139	save (SV *coro, int new_save = -1)
		1140	CODE:
		1141	RETVAL = api_save (coro, new_save);
		1142	OUTPUT:
		1143	RETVAL
		1144
1002	void	1145	void
1003	transfer(prev, next, flags)	1146	_set_stacklevel (...)
1004	SV *prev	1147	ALIAS:
1005	SV *next	1148	Coro::State::transfer = 1
1006	int flags	1149	Coro::schedule = 2
1007	PROTOTYPE: @	1150	Coro::cede = 3
		1151	Coro::cede_notself = 4
1008	CODE:	1152	CODE:
1009	PUTBACK;	1153	{
1010	SV_CORO (next, "Coro::transfer");	1154	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1155
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1156	switch (ix)
1013	SPAGAIN;	1157	{
		1158	case 0:
		1159	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1160	ta.next = 0;
		1161	break;
		1162
		1163	case 1:
		1164	if (items != 2)
		1165	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1166
		1167	prepare_transfer (&ta, ST (0), ST (1));
		1168	break;
		1169
		1170	case 2:
		1171	prepare_schedule (&ta);
		1172	break;
		1173
		1174	case 3:
		1175	prepare_cede (&ta);
		1176	break;
		1177
		1178	case 4:
		1179	if (!prepare_cede_notself (&ta))
		1180	XSRETURN_EMPTY;
		1181
		1182	break;
		1183	}
		1184
		1185	BARRIER;
		1186	TRANSFER (ta);
		1187	}
1014		1188
1015	void	1189	void
1016	DESTROY(coro)	1190	_clone_state_from (SV *dst, SV *src)
1017	Coro::State coro	1191	CODE:
1018	CODE:	1192	{
		1193	struct coro *coro_src = SvSTATE (src);
1019		1194
1020	if (coro->mainstack && coro->mainstack != main_mainstack)	1195	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1021	{
1022	struct coro temp;
1023		1196
1024	PUTBACK;	1197	++coro_src->refcnt;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1198	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1026	LOAD (aTHX_ coro);	1199	}
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040		1200
1041	void	1201	void
1042	_exit(code)	1202	_exit (code)
1043	int code	1203	int code
1044	PROTOTYPE: $	1204	PROTOTYPE: $
1045	CODE:	1205	CODE:
1046	_exit (code);	1206	_exit (code);
1047		1207
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1208	int
		1209	cctx_count ()
		1210	CODE:
		1211	RETVAL = cctx_count;
		1212	OUTPUT:
		1213	RETVAL
1049		1214
1050	# this is slightly dirty (should expose a c-level api)	1215	int
1051		1216	cctx_idle ()
1052	void	1217	CODE:
1053	yield(...)	1218	RETVAL = cctx_idle;
1054	PROTOTYPE: @	1219	OUTPUT:
1055	CODE:	1220	RETVAL
1056	static SV *returnstk;
1057	SV *sv;
1058	AV *defav = GvAV (PL_defgv);
1059	struct coro *prev, *next;
1060
1061	if (!returnstk)
1062	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064	/* set up @_ -- ugly */
1065	av_clear (defav);
1066	av_fill (defav, items - 1);
1067	while (items--)
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071	sv = av_pop ((AV *)SvRV (returnstk));
1072	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074	SvREFCNT_dec (sv);
1075
1076	transfer (aTHX_ prev, next, 0);
1077		1221
1078	MODULE = Coro::State PACKAGE = Coro	1222	MODULE = Coro::State PACKAGE = Coro
1079		1223
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1224	BOOT:
1083	{	1225	{
1084	int i;	1226	int i;
		1227
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1228	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1229
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1230	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1231	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1232	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1233	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1234	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1235	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093		1236
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1237	coro_current = get_sv ("Coro::current", FALSE);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1238	SvREADONLY_on (coro_current);
1096		1239
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1240	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098	coro_ready[i] = newAV ();	1241	coro_ready[i] = newAV ();
1099		1242
1100	{	1243	{
1101	SV *sv = perl_get_sv("Coro::API", 1);	1244	SV *sv = perl_get_sv("Coro::API", 1);
1102		1245
1103	coroapi.schedule = api_schedule;	1246	coroapi.schedule = api_schedule;
		1247	coroapi.save = api_save;
1104	coroapi.cede = api_cede;	1248	coroapi.cede = api_cede;
		1249	coroapi.cede_notself = api_cede_notself;
1105	coroapi.ready = api_ready;	1250	coroapi.ready = api_ready;
		1251	coroapi.is_ready = api_is_ready;
1106	coroapi.nready = &coro_nready;	1252	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1253	coroapi.current = coro_current;
1108		1254
1109	GCoroAPI = &coroapi;	1255	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1256	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1257	SvREADONLY_on (sv);
1112	}	1258	}
1113	}	1259	}
1114		1260
1115	#if !PERL_MICRO
1116
1117	void	1261	void
1118	ready(self)	1262	_set_current (SV *current)
1119	SV * self
1120	PROTOTYPE: $	1263	PROTOTYPE: $
1121	CODE:	1264	CODE:
1122	api_ready (self);	1265	SvREFCNT_dec (SvRV (coro_current));
1123		1266	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1124	#endif
1125		1267
1126	int	1268	int
		1269	prio (Coro::State coro, int newprio = 0)
		1270	ALIAS:
		1271	nice = 1
		1272	CODE:
		1273	{
		1274	RETVAL = coro->prio;
		1275
		1276	if (items > 1)
		1277	{
		1278	if (ix)
		1279	newprio = coro->prio - newprio;
		1280
		1281	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1282	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1283
		1284	coro->prio = newprio;
		1285	}
		1286	}
		1287	OUTPUT:
		1288	RETVAL
		1289
		1290	SV *
		1291	ready (SV *self)
		1292	PROTOTYPE: $
		1293	CODE:
		1294	RETVAL = boolSV (api_ready (self));
		1295	OUTPUT:
		1296	RETVAL
		1297
		1298	SV *
		1299	is_ready (SV *self)
		1300	PROTOTYPE: $
		1301	CODE:
		1302	RETVAL = boolSV (api_is_ready (self));
		1303	OUTPUT:
		1304	RETVAL
		1305
		1306	int
1127	nready(...)	1307	nready (...)
1128	PROTOTYPE:	1308	PROTOTYPE:
1129	CODE:	1309	CODE:
1130	RETVAL = coro_nready;	1310	RETVAL = coro_nready;
1131	OUTPUT:	1311	OUTPUT:
1132	RETVAL	1312	RETVAL
1133		1313
		1314	MODULE = Coro::State PACKAGE = Coro::AIO
		1315
		1316	SV *
		1317	_get_state ()
		1318	CODE:
		1319	{
		1320	struct io_state *data;
		1321
		1322	RETVAL = newSV (sizeof (struct io_state));
		1323	data = (struct io_state *)SvPVX (RETVAL);
		1324	SvCUR_set (RETVAL, sizeof (struct io_state));
		1325	SvPOK_only (RETVAL);
		1326
		1327	data->errorno = errno;
		1328	data->laststype = PL_laststype;
		1329	data->laststatval = PL_laststatval;
		1330	data->statcache = PL_statcache;
		1331	}
		1332	OUTPUT:
		1333	RETVAL
		1334
1134	void	1335	void
1135	schedule(...)	1336	_set_state (char *data_)
1136	PROTOTYPE:	1337	PROTOTYPE: $
1137	CODE:	1338	CODE:
1138	api_schedule ();	1339	{
		1340	struct io_state *data = (void *)data_;
1139		1341
1140	void	1342	errno = data->errorno;
1141	cede(...)	1343	PL_laststype = data->laststype;
1142	PROTOTYPE:	1344	PL_laststatval = data->laststatval;
1143	CODE:	1345	PL_statcache = data->statcache;
1144	api_cede ();	1346	}
1145		1347

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