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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.107 by root, Mon Nov 27 02:15:51 2006 UTC vs.
Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
74	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
75	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	95	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
79		98
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		100
82	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	104	#else
85	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
86	#endif	107	#endif
87		108
88	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
89		110
90	#include "CoroAPI.h"	111	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		112
94	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	117	#else
99	# define LOCK (void)0	118	# define LOCK (void)0
100	# define UNLOCK (void)0	119	# define UNLOCK (void)0
101	#endif	120	#endif
102		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
105	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
107		136
…		…
112	typedef struct coro_cctx {	141	typedef struct coro_cctx {
113	struct coro_cctx *next;	142	struct coro_cctx *next;
114		143
115	/* the stack */	144	/* the stack */
116	void *sptr;	145	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
118		147
119	/* cpu state */	148	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	151	JMPENV *top_env;
122	coro_context cctx;	152	coro_context cctx;
123		153
124	#if USE_VALGRIND	154	#if CORO_USE_VALGRIND
125	int valgrind_id;	155	int valgrind_id;
126	#endif	156	#endif
		157	char inuse, mapped;
127	} coro_cctx;	158	} coro_cctx;
		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
128		166
129	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
130	struct coro {	168	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	170	coro_cctx *cctx;
133		171
134	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
135	AV *args;	173	AV *args;
136	int refcnt;	174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
137		177
138	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
139	AV *defav;	179	AV *defav; /* @_ */
140	SV *defsv;	180	SV *defsv; /* $_ */
141	SV *errsv;	181	SV *errsv; /* $@ */
		182	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
142		185
143	/* saved global state not related to stacks */	186	#define VAR(name,type) type name;
144	U8 dowarn;	187	# include "state.h"
145	I32 in_eval;	188	#undef VAR
146
147	/* the stacks and related info (callchain etc..) */
148	PERL_SI *curstackinfo;
149	AV *curstack;
150	AV *mainstack;
151	SV **stack_sp;
152	OP *op;
153	SV **curpad;
154	AV *comppad;
155	CV *compcv;
156	SV **stack_base;
157	SV **stack_max;
158	SV **tmps_stack;
159	I32 tmps_floor;
160	I32 tmps_ix;
161	I32 tmps_max;
162	I32 *markstack;
163	I32 *markstack_ptr;
164	I32 *markstack_max;
165	I32 *scopestack;
166	I32 scopestack_ix;
167	I32 scopestack_max;
168	ANY *savestack;
169	I32 savestack_ix;
170	I32 savestack_max;
171	OP **retstack;
172	I32 retstack_ix;
173	I32 retstack_max;
174	PMOP *curpm;
175	COP *curcop;
176		189
177	/* coro process data */	190	/* coro process data */
178	int prio;	191	int prio;
179	};	192	};
180		193
181	typedef struct coro *Coro__State;	194	typedef struct coro *Coro__State;
182	typedef struct coro *Coro__State_or_hashref;	195	typedef struct coro *Coro__State_or_hashref;
183		196
		197	/** Coro ********************************************************************/
		198
		199	#define PRIO_MAX 3
		200	#define PRIO_HIGH 1
		201	#define PRIO_NORMAL 0
		202	#define PRIO_LOW -1
		203	#define PRIO_IDLE -3
		204	#define PRIO_MIN -4
		205
		206	/* for Coro.pm */
		207	static SV *coro_current;
		208	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		209	static int coro_nready;
		210
		211	/** lowlevel stuff **********************************************************/
		212
184	static AV *	213	static AV *
185	coro_clone_padlist (CV *cv)	214	coro_clone_padlist (pTHX_ CV *cv)
186	{	215	{
187	AV *padlist = CvPADLIST (cv);	216	AV *padlist = CvPADLIST (cv);
188	AV *newpadlist, *newpad;	217	AV *newpadlist, *newpad;
189		218
190	newpadlist = newAV ();	219	newpadlist = newAV ();
…		…
202		231
203	return newpadlist;	232	return newpadlist;
204	}	233	}
205		234
206	static void	235	static void
207	free_padlist (AV *padlist)	236	free_padlist (pTHX_ AV *padlist)
208	{	237	{
209	/* may be during global destruction */	238	/* may be during global destruction */
210	if (SvREFCNT (padlist))	239	if (SvREFCNT (padlist))
211	{	240	{
212	I32 i = AvFILLp (padlist);	241	I32 i = AvFILLp (padlist);
…		…
233	AV *padlist;	262	AV *padlist;
234	AV *av = (AV *)mg->mg_obj;	263	AV *av = (AV *)mg->mg_obj;
235		264
236	/* casting is fun. */	265	/* casting is fun. */
237	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	266	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
238	free_padlist (padlist);	267	free_padlist (aTHX_ padlist);
239		268
240	SvREFCNT_dec (av);	269	SvREFCNT_dec (av);
241		270
242	return 0;	271	return 0;
243	}	272	}
244		273
245	#define PERL_MAGIC_coro PERL_MAGIC_ext	274	#define PERL_MAGIC_coro PERL_MAGIC_ext
246		275
247	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	276	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
248		277
		278	#define CORO_MAGIC(cv) \
		279	SvMAGIC (cv) \
		280	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		281	? SvMAGIC (cv) \
		282	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		283	: 0
		284
249	/* the next two functions merely cache the padlists */	285	/* the next two functions merely cache the padlists */
250	static void	286	static void
251	get_padlist (CV *cv)	287	get_padlist (pTHX_ CV *cv)
252	{	288	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	289	MAGIC *mg = CORO_MAGIC (cv);
		290	AV *av;
254		291
255	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	292	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
256	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	293	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
257	else	294	else
258	{	295	{
259	#if 0	296	#if CORO_PREFER_PERL_FUNCTIONS
260	/* this is probably cleaner, but also slower? */	297	/* this is probably cleaner, but also slower? */
261	CV *cp = Perl_cv_clone (cv);	298	CV *cp = Perl_cv_clone (cv);
262	CvPADLIST (cv) = CvPADLIST (cp);	299	CvPADLIST (cv) = CvPADLIST (cp);
263	CvPADLIST (cp) = 0;	300	CvPADLIST (cp) = 0;
264	SvREFCNT_dec (cp);	301	SvREFCNT_dec (cp);
265	#else	302	#else
266	CvPADLIST (cv) = coro_clone_padlist (cv);	303	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
267	#endif	304	#endif
268	}	305	}
269	}	306	}
270		307
271	static void	308	static void
272	put_padlist (CV *cv)	309	put_padlist (pTHX_ CV *cv)
273	{	310	{
274	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	311	MAGIC *mg = CORO_MAGIC (cv);
		312	AV *av;
275		313
276	if (!mg)	314	if (!mg)
277	{	315	{
278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	316	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
280	mg->mg_virtual = &vtbl_coro;	318	mg->mg_virtual = &vtbl_coro;
281	mg->mg_obj = (SV *)newAV ();	319	mg->mg_obj = (SV *)newAV ();
282	}	320	}
283		321
284	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	322	av = (AV *)mg->mg_obj;
		323
		324	if (AvFILLp (av) >= AvMAX (av))
		325	av_extend (av, AvMAX (av) + 1);
		326
		327	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285	}	328	}
		329
		330	/** load & save, init *******************************************************/
286		331
287	#define SB do {	332	#define SB do {
288	#define SE } while (0)	333	#define SE } while (0)
289		334
290	#define LOAD(state) load_state((state));
291	#define SAVE(state,flags) save_state((state),(flags));
292
293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	335	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
294		336
295	static void	337	static void
296	load_state(Coro__State c)	338	load_perl (pTHX_ Coro__State c)
297	{	339	{
298	PL_dowarn = c->dowarn;	340	#define VAR(name,type) PL_ ## name = c->name;
299	PL_in_eval = c->in_eval;	341	# include "state.h"
300		342	#undef VAR
301	PL_curstackinfo = c->curstackinfo;
302	PL_curstack = c->curstack;
303	PL_mainstack = c->mainstack;
304	PL_stack_sp = c->stack_sp;
305	PL_op = c->op;
306	PL_curpad = c->curpad;
307	PL_comppad = c->comppad;
308	PL_compcv = c->compcv;
309	PL_stack_base = c->stack_base;
310	PL_stack_max = c->stack_max;
311	PL_tmps_stack = c->tmps_stack;
312	PL_tmps_floor = c->tmps_floor;
313	PL_tmps_ix = c->tmps_ix;
314	PL_tmps_max = c->tmps_max;
315	PL_markstack = c->markstack;
316	PL_markstack_ptr = c->markstack_ptr;
317	PL_markstack_max = c->markstack_max;
318	PL_scopestack = c->scopestack;
319	PL_scopestack_ix = c->scopestack_ix;
320	PL_scopestack_max = c->scopestack_max;
321	PL_savestack = c->savestack;
322	PL_savestack_ix = c->savestack_ix;
323	PL_savestack_max = c->savestack_max;
324	#if !PERL_VERSION_ATLEAST (5,9,0)
325	PL_retstack = c->retstack;
326	PL_retstack_ix = c->retstack_ix;
327	PL_retstack_max = c->retstack_max;
328	#endif
329	PL_curpm = c->curpm;
330	PL_curcop = c->curcop;
331		343
332	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
333	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
334	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		347	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		348
		349	if (c->irssv)
		350	{
		351	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		352	{
		353	SvREFCNT_dec (c->irssv);
		354	c->irssv = 0;
		355	}
		356	else
		357	{
		358	REPLACE_SV (PL_rs, c->irssv);
		359	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		360	sv_setsv (c->irssv_sv, PL_rs);
		361	}
		362	}
335		363
336	{	364	{
337	dSP;	365	dSP;
338	CV *cv;	366	CV *cv;
339		367
340	/* now do the ugly restore mess */	368	/* now do the ugly restore mess */
341	while ((cv = (CV *)POPs))	369	while ((cv = (CV *)POPs))
342	{	370	{
343	AV *padlist = (AV *)POPs;
344
345	if (padlist)
346	{
347	put_padlist (cv); /* mark this padlist as available */	371	put_padlist (aTHX_ cv); /* mark this padlist as available */
348	CvPADLIST(cv) = padlist;	372	CvDEPTH (cv) = PTR2IV (POPs);
349	}	373	CvPADLIST (cv) = (AV *)POPs;
350
351	++CvDEPTH(cv);
352	}	374	}
353		375
354	PUTBACK;	376	PUTBACK;
355	}	377	}
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
356	}	379	}
357		380
358	static void	381	static void
359	save_state(Coro__State c, int flags)	382	save_perl (pTHX_ Coro__State c)
360	{	383	{
		384	assert (!PL_comppad || AvARRAY (PL_comppad));//D
361	{	385	{
362	dSP;	386	dSP;
363	I32 cxix = cxstack_ix;	387	I32 cxix = cxstack_ix;
364	PERL_CONTEXT *ccstk = cxstack;	388	PERL_CONTEXT *ccstk = cxstack;
365	PERL_SI *top_si = PL_curstackinfo;	389	PERL_SI *top_si = PL_curstackinfo;
…		…
367	/*	391	/*
368	* the worst thing you can imagine happens first - we have to save	392	* the worst thing you can imagine happens first - we have to save
369	* (and reinitialize) all cv's in the whole callchain :(	393	* (and reinitialize) all cv's in the whole callchain :(
370	*/	394	*/
371		395
		396	EXTEND (SP, 3 + 1);
372	PUSHs (Nullsv);	397	PUSHs (Nullsv);
373	/* this loop was inspired by pp_caller */	398	/* this loop was inspired by pp_caller */
374	for (;;)	399	for (;;)
375	{	400	{
376	while (cxix >= 0)	401	while (cxix >= 0)
377	{	402	{
378	PERL_CONTEXT *cx = &ccstk[cxix--];	403	PERL_CONTEXT *cx = &ccstk[cxix--];
379		404
380	if (CxTYPE(cx) == CXt_SUB)	405	if (CxTYPE (cx) == CXt_SUB)
381	{	406	{
382	CV *cv = cx->blk_sub.cv;	407	CV *cv = cx->blk_sub.cv;
		408
383	if (CvDEPTH(cv))	409	if (CvDEPTH (cv))
384	{	410	{
385	EXTEND (SP, CvDEPTH(cv)*2);	411	EXTEND (SP, 3);
386
387	while (--CvDEPTH(cv))
388	{
389	/* this tells the restore code to increment CvDEPTH */
390	PUSHs (Nullsv);
391	PUSHs ((SV *)cv);
392	}
393
394	PUSHs ((SV *)CvPADLIST(cv));	412	PUSHs ((SV *)CvPADLIST (cv));
		413	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395	PUSHs ((SV *)cv);	414	PUSHs ((SV *)cv);
396		415
		416	CvDEPTH (cv) = 0;
397	get_padlist (cv);	417	get_padlist (aTHX_ cv);
398	}	418	}
399	}	419	}
400	#ifdef CXt_FORMAT
401	else if (CxTYPE(cx) == CXt_FORMAT)
402	{
403	/* I never used formats, so how should I know how these are implemented? */
404	/* my bold guess is as a simple, plain sub... */
405	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
406	}
407	#endif
408	}	420	}
409		421
410	if (top_si->si_type == PERLSI_MAIN)	422	if (top_si->si_type == PERLSI_MAIN)
411	break;	423	break;
412		424
…		…
416	}	428	}
417		429
418	PUTBACK;	430	PUTBACK;
419	}	431	}
420		432
421	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	433	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
422	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	434	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
423	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	435	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		436	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		437	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
424		438
425	c->dowarn = PL_dowarn;	439	#define VAR(name,type)c->name = PL_ ## name;
426	c->in_eval = PL_in_eval;	440	# include "state.h"
427		441	#undef VAR
428	c->curstackinfo = PL_curstackinfo;
429	c->curstack = PL_curstack;
430	c->mainstack = PL_mainstack;
431	c->stack_sp = PL_stack_sp;
432	c->op = PL_op;
433	c->curpad = PL_curpad;
434	c->comppad = PL_comppad;
435	c->compcv = PL_compcv;
436	c->stack_base = PL_stack_base;
437	c->stack_max = PL_stack_max;
438	c->tmps_stack = PL_tmps_stack;
439	c->tmps_floor = PL_tmps_floor;
440	c->tmps_ix = PL_tmps_ix;
441	c->tmps_max = PL_tmps_max;
442	c->markstack = PL_markstack;
443	c->markstack_ptr = PL_markstack_ptr;
444	c->markstack_max = PL_markstack_max;
445	c->scopestack = PL_scopestack;
446	c->scopestack_ix = PL_scopestack_ix;
447	c->scopestack_max = PL_scopestack_max;
448	c->savestack = PL_savestack;
449	c->savestack_ix = PL_savestack_ix;
450	c->savestack_max = PL_savestack_max;
451	#if !PERL_VERSION_ATLEAST (5,9,0)
452	c->retstack = PL_retstack;
453	c->retstack_ix = PL_retstack_ix;
454	c->retstack_max = PL_retstack_max;
455	#endif
456	c->curpm = PL_curpm;
457	c->curcop = PL_curcop;
458	}	442	}
459		443
460	/*	444	/*
461	* allocate various perl stacks. This is an exact copy	445	* allocate various perl stacks. This is an exact copy
462	* of perl.c:init_stacks, except that it uses less memory	446	* of perl.c:init_stacks, except that it uses less memory
463	* on the (sometimes correct) assumption that coroutines do	447	* on the (sometimes correct) assumption that coroutines do
464	* not usually need a lot of stackspace.	448	* not usually need a lot of stackspace.
465	*/	449	*/
		450	#if CORO_PREFER_PERL_FUNCTIONS
		451	# define coro_init_stacks init_stacks
		452	#else
466	static void	453	static void
467	coro_init_stacks ()	454	coro_init_stacks (pTHX)
468	{	455	{
469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	456	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
470	PL_curstackinfo->si_type = PERLSI_MAIN;	457	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	458	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473		460
474	PL_stack_base = AvARRAY(PL_curstack);	461	PL_stack_base = AvARRAY(PL_curstack);
475	PL_stack_sp = PL_stack_base;	462	PL_stack_sp = PL_stack_base;
476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477		464
478	New(50,PL_tmps_stack,96,SV*);	465	New(50,PL_tmps_stack,128,SV*);
479	PL_tmps_floor = -1;	466	PL_tmps_floor = -1;
480	PL_tmps_ix = -1;	467	PL_tmps_ix = -1;
481	PL_tmps_max = 96;	468	PL_tmps_max = 128;
482		469
483	New(54,PL_markstack,16,I32);	470	New(54,PL_markstack,32,I32);
484	PL_markstack_ptr = PL_markstack;	471	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	472	PL_markstack_max = PL_markstack + 32;
486		473
487	#ifdef SET_MARK_OFFSET	474	#ifdef SET_MARK_OFFSET
488	SET_MARK_OFFSET;	475	SET_MARK_OFFSET;
489	#endif	476	#endif
490		477
491	New(54,PL_scopestack,16,I32);	478	New(54,PL_scopestack,32,I32);
492	PL_scopestack_ix = 0;	479	PL_scopestack_ix = 0;
493	PL_scopestack_max = 16;	480	PL_scopestack_max = 32;
494		481
495	New(54,PL_savestack,96,ANY);	482	New(54,PL_savestack,64,ANY);
496	PL_savestack_ix = 0;	483	PL_savestack_ix = 0;
497	PL_savestack_max = 96;	484	PL_savestack_max = 64;
498		485
499	#if !PERL_VERSION_ATLEAST (5,9,0)	486	#if !PERL_VERSION_ATLEAST (5,9,0)
500	New(54,PL_retstack,8,OP*);	487	New(54,PL_retstack,16,OP*);
501	PL_retstack_ix = 0;	488	PL_retstack_ix = 0;
502	PL_retstack_max = 8;	489	PL_retstack_max = 16;
503	#endif	490	#endif
504	}	491	}
		492	#endif
505		493
506	/*	494	/*
507	* destroy the stacks, the callchain etc...	495	* destroy the stacks, the callchain etc...
508	*/	496	*/
509	static void	497	static void
510	coro_destroy_stacks ()	498	coro_destroy_stacks (pTHX)
511	{	499	{
512	if (!IN_DESTRUCT)	500	if (!IN_DESTRUCT)
513	{	501	{
514	/* is this ugly, I ask? */	502	/* restore all saved variables and stuff */
515	LEAVE_SCOPE (0);	503	LEAVE_SCOPE (0);
		504	assert (PL_tmps_floor == -1);
516		505
517	/* sure it is, but more important: is it correct?? :/ */	506	/* free all temporaries */
518	FREETMPS;	507	FREETMPS;
		508	assert (PL_tmps_ix == -1);
519		509
		510	/* unwind all extra stacks */
520	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	511	POPSTACK_TO (PL_mainstack);
		512
		513	/* unwind main stack */
		514	dounwind (-1);
521	}	515	}
522		516
523	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
524	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
525		519
526	while (PL_curstackinfo)	520	while (PL_curstackinfo)
527	{	521	{
528	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
529		523
530	{ /*D*//*remove*/
531	dSP;
532	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
533	PUTBACK; /* possibly superfluous */
534	}
535
536	if (!IN_DESTRUCT)	524	if (!IN_DESTRUCT)
537	{
538	dounwind (-1);/*D*//*remove*/
539	SvREFCNT_dec (PL_curstackinfo->si_stack);	525	SvREFCNT_dec (PL_curstackinfo->si_stack);
540	}
541		526
542	Safefree (PL_curstackinfo->si_cxstack);	527	Safefree (PL_curstackinfo->si_cxstack);
543	Safefree (PL_curstackinfo);	528	Safefree (PL_curstackinfo);
544	PL_curstackinfo = p;	529	PL_curstackinfo = p;
545	}	530	}
…		…
551	#if !PERL_VERSION_ATLEAST (5,9,0)	536	#if !PERL_VERSION_ATLEAST (5,9,0)
552	Safefree (PL_retstack);	537	Safefree (PL_retstack);
553	#endif	538	#endif
554	}	539	}
555		540
		541	/** coroutine stack handling ************************************************/
		542
556	static void	543	static void
557	setup_coro (struct coro *coro)	544	setup_coro (pTHX_ struct coro *coro)
558	{	545	{
559	/*	546	/*
560	* emulate part of the perl startup here.	547	* emulate part of the perl startup here.
561	*/	548	*/
562
563	coro_init_stacks ();	549	coro_init_stacks (aTHX);
564		550
		551	PL_curcop = &PL_compiling;
		552	PL_in_eval = EVAL_NULL;
565	PL_curcop = 0;	553	PL_comppad = 0;
566	PL_in_eval = 0;
567	PL_curpm = 0;	554	PL_curpm = 0;
		555	PL_localizing = 0;
		556	PL_dirty = 0;
		557	PL_restartop = 0;
568		558
569	{	559	{
570	dSP;	560	dSP;
571	LOGOP myop;	561	LOGOP myop;
572		562
573	/* I have no idea why this is needed, but it is */
574	PUSHMARK (SP);
575
576	SvREFCNT_dec (GvAV (PL_defgv));	563	SvREFCNT_dec (GvAV (PL_defgv));
577	GvAV (PL_defgv) = coro->args; coro->args = 0;	564	GvAV (PL_defgv) = coro->args; coro->args = 0;
578		565
579	Zero (&myop, 1, LOGOP);	566	Zero (&myop, 1, LOGOP);
580	myop.op_next = Nullop;	567	myop.op_next = Nullop;
581	myop.op_flags = OPf_WANT_VOID;	568	myop.op_flags = OPf_WANT_VOID;
582		569
583	PL_op = (OP *)&myop;
584
585	PUSHMARK (SP);	570	PUSHMARK (SP);
586	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	571	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
587	PUTBACK;	572	PUTBACK;
		573	PL_op = (OP *)&myop;
588	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
589	SPAGAIN;	575	SPAGAIN;
590
591	ENTER; /* necessary e.g. for dounwind */
592	}	576	}
593	}
594		577
		578	ENTER; /* necessary e.g. for dounwind */
		579	}
		580
595	static void	581	static void
596	free_coro_mortal ()	582	free_coro_mortal (pTHX)
597	{	583	{
598	if (coro_mortal)	584	if (coro_mortal)
599	{	585	{
600	SvREFCNT_dec (coro_mortal);	586	SvREFCNT_dec (coro_mortal);
601	coro_mortal = 0;	587	coro_mortal = 0;
602	}	588	}
603	}	589	}
604		590
		591	/* inject a fake call to Coro::State::_cctx_init into the execution */
605	static void NOINLINE	592	static void NOINLINE
606	prepare_cctx (coro_cctx *cctx)	593	prepare_cctx (pTHX_ coro_cctx *cctx)
607	{	594	{
608	dSP;	595	dSP;
609	LOGOP myop;	596	LOGOP myop;
610		597
611	Zero (&myop, 1, LOGOP);	598	Zero (&myop, 1, LOGOP);
612	myop.op_next = PL_op;	599	myop.op_next = PL_op;
613	myop.op_flags = OPf_WANT_VOID;	600	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
614
615	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
616		601
617	PUSHMARK (SP);	602	PUSHMARK (SP);
		603	EXTEND (SP, 2);
		604	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
618	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	605	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
619	PUTBACK;	606	PUTBACK;
		607	PL_op = (OP *)&myop;
620	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
621	SPAGAIN;	609	SPAGAIN;
622	}	610	}
623		611
624	static void	612	static void
625	coro_run (void *arg)	613	coro_run (void *arg)
626	{	614	{
		615	dTHX;
		616
627	/* coro_run is the alternative epilogue of transfer() */	617	/* coro_run is the alternative tail of transfer(), so unlock here. */
628	UNLOCK;	618	UNLOCK;
629		619
630	/*	620	/*
631	* this is a _very_ stripped down perl interpreter ;)	621	* this is a _very_ stripped down perl interpreter ;)
632	*/	622	*/
633	PL_top_env = &PL_start_env;	623	PL_top_env = &PL_start_env;
634		624
635	/* inject call to cctx_init */	625	/* inject call to cctx_init */
636	prepare_cctx ((coro_cctx *)arg);	626	prepare_cctx (aTHX_ (coro_cctx *)arg);
637		627
638	/* somebody will hit me for both perl_run and PL_restartop */	628	/* somebody will hit me for both perl_run and PL_restartop */
		629	PL_restartop = PL_op;
639	perl_run (PL_curinterp);	630	perl_run (PL_curinterp);
640		631
641	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	632	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
642	abort ();	633	abort ();
643	}	634	}
644		635
645	static coro_cctx *	636	static coro_cctx *
646	cctx_new ()	637	cctx_new ()
647	{	638	{
648	coro_cctx *cctx;	639	coro_cctx *cctx;
		640	void *stack_start;
		641	size_t stack_size;
649		642
650	++cctx_count;	643	++cctx_count;
651		644
652	New (0, cctx, 1, coro_cctx);	645	Newz (0, cctx, 1, coro_cctx);
653		646
654	#if HAVE_MMAP	647	#if HAVE_MMAP
655		648
656	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	649	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
657	/* mmap suppsedly does allocate-on-write for us */	650	/* mmap supposedly does allocate-on-write for us */
658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	651	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659		652
660	if (cctx->sptr == (void *)-1)	653	if (cctx->sptr != (void *)-1)
661	{
662	perror ("FATAL: unable to mmap stack for coroutine");
663	_exit (EXIT_FAILURE);
664	}	654	{
665
666	# if STACKGUARD	655	# if CORO_STACKGUARD
667	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	656	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
668	# endif	657	# endif
		658	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		659	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		660	cctx->mapped = 1;
		661	}
		662	else
		663	#endif
		664	{
		665	cctx->ssize = coro_stacksize * (long)sizeof (long);
		666	New (0, cctx->sptr, coro_stacksize, long);
669		667
670	#else
671
672	cctx->ssize = STACKSIZE * (long)sizeof (long);
673	New (0, cctx->sptr, STACKSIZE, long);
674
675	if (!cctx->sptr)	668	if (!cctx->sptr)
676	{	669	{
677	perror ("FATAL: unable to malloc stack for coroutine");	670	perror ("FATAL: unable to allocate stack for coroutine");
678	_exit (EXIT_FAILURE);	671	_exit (EXIT_FAILURE);
679	}	672	}
680		673
681	#endif	674	stack_start = cctx->sptr;
		675	stack_size = cctx->ssize;
		676	}
682		677
683	#if USE_VALGRIND	678	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
684	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
685	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
686	cctx->ssize + (char *)cctx->sptr
687	);
688	#endif
689
690	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	679	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
691		680
692	return cctx;	681	return cctx;
693	}	682	}
694		683
695	static void	684	static void
696	cctx_free (coro_cctx *cctx)	685	cctx_destroy (coro_cctx *cctx)
697	{	686	{
698	if (!cctx)	687	if (!cctx)
699	return;	688	return;
700		689
701	--cctx_count;	690	--cctx_count;
702		691
703	#if USE_VALGRIND	692	#if CORO_USE_VALGRIND
704	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	693	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
705	#endif	694	#endif
706		695
707	#if HAVE_MMAP	696	#if HAVE_MMAP
		697	if (cctx->mapped)
708	munmap (cctx->sptr, cctx->ssize);	698	munmap (cctx->sptr, cctx->ssize);
709	#else	699	else
		700	#endif
710	Safefree (cctx->sptr);	701	Safefree (cctx->sptr);
711	#endif
712		702
713	Safefree (cctx);	703	Safefree (cctx);
714	}	704	}
715		705
716	static coro_cctx *	706	static coro_cctx *
717	cctx_get ()	707	cctx_get (pTHX)
718	{	708	{
719	coro_cctx *cctx;
720
721	if (cctx_first)	709	while (cctx_first)
722	{	710	{
		711	coro_cctx *cctx = cctx_first;
		712	cctx_first = cctx->next;
723	--cctx_idle;	713	--cctx_idle;
724	cctx = cctx_first;	714
725	cctx_first = cctx->next;	715	if (cctx->ssize >= coro_stacksize)
		716	return cctx;
		717
		718	cctx_destroy (cctx);
726	}	719	}
727	else	720
728	{
729	cctx = cctx_new ();
730	PL_op = PL_op->op_next;	721	PL_op = PL_op->op_next;
731	}
732
733	return cctx;	722	return cctx_new ();
734	}	723	}
735		724
736	static void	725	static void
737	cctx_put (coro_cctx *cctx)	726	cctx_put (coro_cctx *cctx)
738	{	727	{
		728	/* free another cctx if overlimit */
		729	if (cctx_idle >= MAX_IDLE_CCTX)
		730	{
		731	coro_cctx *first = cctx_first;
		732	cctx_first = first->next;
		733	--cctx_idle;
		734
		735	assert (!first->inuse);
		736	cctx_destroy (first);
		737	}
		738
739	++cctx_idle;	739	++cctx_idle;
740	cctx->next = cctx_first;	740	cctx->next = cctx_first;
741	cctx_first = cctx;	741	cctx_first = cctx;
742	}	742	}
743		743
		744	/** coroutine switching *****************************************************/
		745
744	/* never call directly, always through the coro_state_transfer global variable */	746	/* never call directly, always through the coro_state_transfer global variable */
745	static void NOINLINE	747	static void NOINLINE
746	transfer (struct coro *prev, struct coro *next, int flags)	748	transfer (pTHX_ struct coro *prev, struct coro *next)
747	{	749	{
748	dSTACKLEVEL;	750	dSTACKLEVEL;
749		751
750	/* sometimes transfer is only called to set idle_sp */	752	/* sometimes transfer is only called to set idle_sp */
751	if (flags == TRANSFER_SET_STACKLEVEL)	753	if (!next)
		754	{
752	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	755	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		756	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		757	}
753	else if (prev != next)	758	else if (prev != next)
754	{	759	{
755	coro_cctx *prev__cctx;	760	coro_cctx *prev__cctx;
756		761
		762	if (prev->flags & CF_NEW)
		763	{
		764	/* create a new empty context */
		765	Newz (0, prev->cctx, 1, coro_cctx);
		766	prev->cctx->inuse = 1;
		767	prev->flags &= ~CF_NEW;
		768	prev->flags |= CF_RUNNING;
		769	}
		770
		771	/*TODO: must not croak here */
		772	if (!prev->flags & CF_RUNNING)
		773	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		774
		775	if (next->flags & CF_RUNNING)
		776	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		777
		778	if (next->flags & CF_DESTROYED)
		779	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		780
		781	prev->flags &= ~CF_RUNNING;
		782	next->flags |= CF_RUNNING;
		783
757	LOCK;	784	LOCK;
758		785
759	if (next->mainstack)	786	if (next->flags & CF_NEW)
760	{	787	{
761	/* coroutine already started */	788	/* need to start coroutine */
762	SAVE (prev, flags);	789	next->flags &= ~CF_NEW;
763	LOAD (next);	790	/* first get rid of the old state */
		791	save_perl (aTHX_ prev);
		792	/* setup coroutine call */
		793	setup_coro (aTHX_ next);
		794	/* need a new stack */
		795	assert (!next->cctx);
764	}	796	}
765	else	797	else
766	{	798	{
767	/* need to start coroutine */	799	/* coroutine already started */
768	/* first get rid of the old state */	800	save_perl (aTHX_ prev);
769	SAVE (prev, -1);	801	load_perl (aTHX_ next);
770	/* setup coroutine call */
771	setup_coro (next);
772	/* need a stack */
773	next->cctx = 0;
774	}	802	}
775
776	if (!prev->cctx)
777	/* create a new empty context */
778	Newz (0, prev->cctx, 1, coro_cctx);
779		803
780	prev__cctx = prev->cctx;	804	prev__cctx = prev->cctx;
781		805
782	/* possibly "free" the cctx */	806	/* possibly "free" the cctx */
783	if (prev__cctx->idle_sp == STACKLEVEL)	807	if (prev__cctx->idle_sp == STACKLEVEL)
784	{	808	{
		809	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		810	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		811
		812	prev->cctx = 0;
		813
785	cctx_put (prev__cctx);	814	cctx_put (prev__cctx);
786	prev->cctx = 0;	815	prev__cctx->inuse = 0;
787	}	816	}
788		817
789	if (!next->cctx)	818	if (!next->cctx)
		819	{
790	next->cctx = cctx_get ();	820	next->cctx = cctx_get (aTHX);
		821	assert (!next->cctx->inuse);
		822	next->cctx->inuse = 1;
		823	}
791		824
792	if (prev__cctx != next->cctx)	825	if (prev__cctx != next->cctx)
793	{	826	{
794	prev__cctx->top_env = PL_top_env;	827	prev__cctx->top_env = PL_top_env;
795	PL_top_env = next->cctx->top_env;	828	PL_top_env = next->cctx->top_env;
796	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	829	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
797	}	830	}
798		831
799	free_coro_mortal ();	832	free_coro_mortal (aTHX);
800
801	UNLOCK;	833	UNLOCK;
802	}	834	}
803	}	835	}
804		836
805	struct transfer_args	837	struct transfer_args
806	{	838	{
807	struct coro *prev, *next;	839	struct coro *prev, *next;
808	int flags;
809	};	840	};
810		841
811	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	842	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
812		843
		844	/** high level stuff ********************************************************/
		845
813	static void	846	static int
814	coro_state_destroy (struct coro *coro)	847	coro_state_destroy (pTHX_ struct coro *coro)
815	{	848	{
816	if (coro->refcnt--)	849	if (coro->flags & CF_DESTROYED)
817	return;	850	return 0;
		851
		852	coro->flags |= CF_DESTROYED;
		853
		854	if (coro->flags & CF_READY)
		855	{
		856	/* reduce nready, as destroying a ready coro effectively unreadies it */
		857	/* alternative: look through all ready queues and remove the coro */
		858	LOCK;
		859	--coro_nready;
		860	UNLOCK;
		861	}
		862	else
		863	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
818		864
819	if (coro->mainstack && coro->mainstack != main_mainstack)	865	if (coro->mainstack && coro->mainstack != main_mainstack)
820	{	866	{
821	struct coro temp;	867	struct coro temp;
822		868
823	SAVE ((&temp), TRANSFER_SAVE_ALL);	869	assert (!(coro->flags & CF_RUNNING));
824	LOAD (coro);
825		870
		871	Zero (&temp, 1, struct coro);
		872	temp.save = CORO_SAVE_DEF;
		873
		874	if (coro->flags & CF_RUNNING)
		875	croak ("FATAL: tried to destroy currently running coroutine");
		876
		877	save_perl (aTHX_ &temp);
		878	load_perl (aTHX_ coro);
		879
826	coro_destroy_stacks ();	880	coro_destroy_stacks (aTHX);
827		881
828	LOAD ((&temp)); /* this will get rid of defsv etc.. */	882	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
829		883
830	coro->mainstack = 0;	884	coro->mainstack = 0;
831	}	885	}
832		886
833	cctx_free (coro->cctx);	887	cctx_destroy (coro->cctx);
834	SvREFCNT_dec (coro->args);	888	SvREFCNT_dec (coro->args);
835	Safefree (coro);	889
		890	return 1;
836	}	891	}
837		892
838	static int	893	static int
839	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	894	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
840	{	895	{
841	struct coro *coro = (struct coro *)mg->mg_ptr;	896	struct coro *coro = (struct coro *)mg->mg_ptr;
842	mg->mg_ptr = 0;	897	mg->mg_ptr = 0;
843		898
		899	if (--coro->refcnt < 0)
		900	{
844	coro_state_destroy (coro);	901	coro_state_destroy (aTHX_ coro);
		902	Safefree (coro);
		903	}
845		904
846	return 0;	905	return 0;
847	}	906	}
848		907
849	static int	908	static int
…		…
856	return 0;	915	return 0;
857	}	916	}
858		917
859	static MGVTBL coro_state_vtbl = {	918	static MGVTBL coro_state_vtbl = {
860	0, 0, 0, 0,	919	0, 0, 0, 0,
861	coro_state_clear,	920	coro_state_free,
862	0,	921	0,
863	#ifdef MGf_DUP	922	#ifdef MGf_DUP
864	coro_state_dup,	923	coro_state_dup,
865	#else	924	#else
866	# define MGf_DUP 0	925	# define MGf_DUP 0
867	#endif	926	#endif
868	};	927	};
869		928
870	static struct coro *	929	static struct coro *
871	SvSTATE (SV *coro)	930	SvSTATE_ (pTHX_ SV *coro)
872	{	931	{
873	HV *stash;	932	HV *stash;
874	MAGIC *mg;	933	MAGIC *mg;
875		934
876	if (SvROK (coro))	935	if (SvROK (coro))
…		…
882	/* very slow, but rare, check */	941	/* very slow, but rare, check */
883	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	942	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
884	croak ("Coro::State object required");	943	croak ("Coro::State object required");
885	}	944	}
886		945
887	mg = SvMAGIC (coro);	946	mg = CORO_MAGIC (coro);
888	assert (mg->mg_type == PERL_MAGIC_ext);
889	return (struct coro *)mg->mg_ptr;	947	return (struct coro *)mg->mg_ptr;
890	}	948	}
891		949
		950	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		951
892	static void	952	static void
893	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	953	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
894	{	954	{
895	ta->prev = SvSTATE (prev);	955	ta->prev = SvSTATE (prev_sv);
896	ta->next = SvSTATE (next);	956	ta->next = SvSTATE (next_sv);
897	ta->flags = flags;
898	}	957	}
899		958
900	static void	959	static void
901	api_transfer (SV *prev, SV *next, int flags)	960	api_transfer (SV *prev_sv, SV *next_sv)
902	{	961	{
903	dTHX;	962	dTHX;
904	struct transfer_args ta;	963	struct transfer_args ta;
905		964
906	prepare_transfer (&ta, prev, next, flags);	965	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
907	TRANSFER (ta);	966	TRANSFER (ta);
908	}	967	}
909		968
		969	static int
		970	api_save (SV *coro_sv, int new_save)
		971	{
		972	dTHX;
		973	struct coro *coro = SvSTATE (coro_sv);
		974	int old_save = coro->save;
		975
		976	if (new_save >= 0)
		977	coro->save = new_save;
		978
		979	return old_save;
		980	}
		981
910	/** Coro ********************************************************************/	982	/** Coro ********************************************************************/
911		983
912	#define PRIO_MAX 3
913	#define PRIO_HIGH 1
914	#define PRIO_NORMAL 0
915	#define PRIO_LOW -1
916	#define PRIO_IDLE -3
917	#define PRIO_MIN -4
918
919	/* for Coro.pm */
920	static GV *coro_current, *coro_idle;
921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
922	static int coro_nready;
923
924	static void	984	static void
925	coro_enq (SV *sv)	985	coro_enq (pTHX_ SV *coro_sv)
926	{	986	{
927	int prio;
928
929	if (SvTYPE (sv) != SVt_PVHV)
930	croak ("Coro::ready tried to enqueue something that is not a coroutine");
931
932	prio = SvSTATE (sv)->prio;
933
934	av_push (coro_ready [prio - PRIO_MIN], sv);	987	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
935	coro_nready++;
936	}	988	}
937		989
938	static SV *	990	static SV *
939	coro_deq (int min_prio)	991	coro_deq (pTHX_ int min_prio)
940	{	992	{
941	int prio = PRIO_MAX - PRIO_MIN;	993	int prio = PRIO_MAX - PRIO_MIN;
942		994
943	min_prio -= PRIO_MIN;	995	min_prio -= PRIO_MIN;
944	if (min_prio < 0)	996	if (min_prio < 0)
945	min_prio = 0;	997	min_prio = 0;
946		998
947	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	999	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
948	if (AvFILLp (coro_ready [prio]) >= 0)	1000	if (AvFILLp (coro_ready [prio]) >= 0)
949	{
950	coro_nready--;
951	return av_shift (coro_ready [prio]);	1001	return av_shift (coro_ready [prio]);
952	}
953		1002
954	return 0;	1003	return 0;
955	}	1004	}
956		1005
957	static void	1006	static int
958	api_ready (SV *coro)	1007	api_ready (SV *coro_sv)
959	{	1008	{
960	dTHX;	1009	dTHX;
		1010	struct coro *coro;
961		1011
962	if (SvROK (coro))	1012	if (SvROK (coro_sv))
963	coro = SvRV (coro);	1013	coro_sv = SvRV (coro_sv);
		1014
		1015	coro = SvSTATE (coro_sv);
		1016
		1017	if (coro->flags & CF_READY)
		1018	return 0;
		1019
		1020	coro->flags |= CF_READY;
964		1021
965	LOCK;	1022	LOCK;
966	coro_enq (SvREFCNT_inc (coro));	1023	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1024	++coro_nready;
967	UNLOCK;	1025	UNLOCK;
968	}
969		1026
		1027	return 1;
		1028	}
		1029
970	static void	1030	static int
		1031	api_is_ready (SV *coro_sv)
		1032	{
		1033	dTHX;
		1034	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1035	}
		1036
		1037	static void
971	prepare_schedule (struct transfer_args *ta)	1038	prepare_schedule (pTHX_ struct transfer_args *ta)
972	{	1039	{
973	SV *current, *prev, *next;	1040	SV *prev_sv, *next_sv;
974
975	current = GvSV (coro_current);
976		1041
977	for (;;)	1042	for (;;)
978	{	1043	{
979	LOCK;	1044	LOCK;
980	next = coro_deq (PRIO_MIN);	1045	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1046
		1047	/* nothing to schedule: call the idle handler */
		1048	if (!next_sv)
		1049	{
		1050	dSP;
		1051	UNLOCK;
		1052
		1053	ENTER;
		1054	SAVETMPS;
		1055
		1056	PUSHMARK (SP);
		1057	PUTBACK;
		1058	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1059
		1060	FREETMPS;
		1061	LEAVE;
		1062	continue;
		1063	}
		1064
		1065	ta->next = SvSTATE (next_sv);
		1066
		1067	/* cannot transfer to destroyed coros, skip and look for next */
		1068	if (ta->next->flags & CF_DESTROYED)
		1069	{
		1070	UNLOCK;
		1071	SvREFCNT_dec (next_sv);
		1072	/* coro_nready is already taken care of by destroy */
		1073	continue;
		1074	}
		1075
		1076	--coro_nready;
981	UNLOCK;	1077	UNLOCK;
982
983	if (next)
984	break;	1078	break;
985
986	{
987	dSP;
988
989	ENTER;
990	SAVETMPS;
991
992	PUSHMARK (SP);
993	PUTBACK;
994	call_sv (GvSV (coro_idle), G_DISCARD);
995
996	FREETMPS;
997	LEAVE;
998	}	1079	}
999	}
1000
1001	prev = SvRV (current);
1002	SvRV (current) = next;
1003		1080
1004	/* free this only after the transfer */	1081	/* free this only after the transfer */
		1082	prev_sv = SvRV (coro_current);
		1083	SvRV_set (coro_current, next_sv);
		1084	ta->prev = SvSTATE (prev_sv);
		1085
		1086	assert (ta->next->flags & CF_READY);
		1087	ta->next->flags &= ~CF_READY;
		1088
1005	LOCK;	1089	LOCK;
1006	free_coro_mortal ();	1090	free_coro_mortal (aTHX);
		1091	coro_mortal = prev_sv;
1007	UNLOCK;	1092	UNLOCK;
1008	coro_mortal = prev;
1009
1010	ta->prev = SvSTATE (prev);
1011	ta->next = SvSTATE (next);
1012	ta->flags = TRANSFER_SAVE_ALL;
1013	}	1093	}
1014		1094
1015	static void	1095	static void
1016	prepare_cede (struct transfer_args *ta)	1096	prepare_cede (pTHX_ struct transfer_args *ta)
1017	{	1097	{
1018	LOCK;	1098	api_ready (coro_current);
1019	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1020	UNLOCK;
1021
1022	prepare_schedule (ta);	1099	prepare_schedule (aTHX_ ta);
		1100	}
		1101
		1102	static int
		1103	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1104	{
		1105	if (coro_nready)
		1106	{
		1107	SV *prev = SvRV (coro_current);
		1108	prepare_schedule (aTHX_ ta);
		1109	api_ready (prev);
		1110	return 1;
		1111	}
		1112	else
		1113	return 0;
1023	}	1114	}
1024		1115
1025	static void	1116	static void
1026	api_schedule (void)	1117	api_schedule (void)
1027	{	1118	{
1028	dTHX;	1119	dTHX;
1029	struct transfer_args ta;	1120	struct transfer_args ta;
1030		1121
1031	prepare_schedule (&ta);	1122	prepare_schedule (aTHX_ &ta);
1032	TRANSFER (ta);	1123	TRANSFER (ta);
1033	}	1124	}
1034		1125
1035	static void	1126	static int
1036	api_cede (void)	1127	api_cede (void)
1037	{	1128	{
1038	dTHX;	1129	dTHX;
1039	struct transfer_args ta;	1130	struct transfer_args ta;
1040		1131
1041	prepare_cede (&ta);	1132	prepare_cede (aTHX_ &ta);
		1133
		1134	if (ta.prev != ta.next)
		1135	{
1042	TRANSFER (ta);	1136	TRANSFER (ta);
		1137	return 1;
		1138	}
		1139	else
		1140	return 0;
		1141	}
		1142
		1143	static int
		1144	api_cede_notself (void)
		1145	{
		1146	dTHX;
		1147	struct transfer_args ta;
		1148
		1149	if (prepare_cede_notself (aTHX_ &ta))
		1150	{
		1151	TRANSFER (ta);
		1152	return 1;
		1153	}
		1154	else
		1155	return 0;
1043	}	1156	}
1044		1157
1045	MODULE = Coro::State PACKAGE = Coro::State	1158	MODULE = Coro::State PACKAGE = Coro::State
1046		1159
1047	PROTOTYPES: DISABLE	1160	PROTOTYPES: DISABLE
…		…
1053	#endif	1166	#endif
1054	BOOT_PAGESIZE;	1167	BOOT_PAGESIZE;
1055		1168
1056	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1169	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1057		1170
1058	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1171	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1059	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1172	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1060	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1173	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1174	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1175	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1176	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1177	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1061		1178
1062	main_mainstack = PL_mainstack;	1179	main_mainstack = PL_mainstack;
1063		1180
1064	coroapi.ver = CORO_API_VERSION;	1181	coroapi.ver = CORO_API_VERSION;
1065	coroapi.transfer = api_transfer;	1182	coroapi.transfer = api_transfer;
…		…
1075	HV *hv;	1192	HV *hv;
1076	int i;	1193	int i;
1077		1194
1078	Newz (0, coro, 1, struct coro);	1195	Newz (0, coro, 1, struct coro);
1079	coro->args = newAV ();	1196	coro->args = newAV ();
		1197	coro->save = CORO_SAVE_DEF;
		1198	coro->flags = CF_NEW;
1080		1199
1081	hv = newHV ();	1200	hv = newHV ();
1082	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1201	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1083	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1202	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1084		1203
1085	for (i = 1; i < items; i++)	1204	for (i = 1; i < items; i++)
1086	av_push (coro->args, newSVsv (ST (i)));	1205	av_push (coro->args, newSVsv (ST (i)));
1087	}	1206	}
1088	OUTPUT:	1207	OUTPUT:
		1208	RETVAL
		1209
		1210	int
		1211	save (SV *coro, int new_save = -1)
		1212	CODE:
		1213	RETVAL = api_save (coro, new_save);
		1214	OUTPUT:
		1215	RETVAL
		1216
		1217	int
		1218	save_also (SV *coro_sv, int save_also)
		1219	CODE:
		1220	{
		1221	struct coro *coro = SvSTATE (coro_sv);
		1222	RETVAL = coro->save;
		1223	coro->save |= save_also;
		1224	}
		1225	OUTPUT:
1089	RETVAL	1226	RETVAL
1090		1227
1091	void	1228	void
1092	_set_stacklevel (...)	1229	_set_stacklevel (...)
1093	ALIAS:	1230	ALIAS:
1094	Coro::State::transfer = 1	1231	Coro::State::transfer = 1
1095	Coro::schedule = 2	1232	Coro::schedule = 2
1096	Coro::cede = 3	1233	Coro::cede = 3
1097	Coro::Cont::yield = 4	1234	Coro::cede_notself = 4
1098	CODE:	1235	CODE:
1099	{	1236	{
1100	struct transfer_args ta;	1237	struct transfer_args ta;
1101		1238
1102	switch (ix)	1239	switch (ix)
1103	{	1240	{
1104	case 0:	1241	case 0:
1105	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1242	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1106	ta.next = 0;	1243	ta.next = 0;
1107	ta.flags = TRANSFER_SET_STACKLEVEL;
1108	break;	1244	break;
1109		1245
1110	case 1:	1246	case 1:
1111	if (items != 3)	1247	if (items != 2)
1112	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1248	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1113		1249
1114	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1250	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1115	break;	1251	break;
1116		1252
1117	case 2:	1253	case 2:
1118	prepare_schedule (&ta);	1254	prepare_schedule (aTHX_ &ta);
1119	break;	1255	break;
1120		1256
1121	case 3:	1257	case 3:
1122	prepare_cede (&ta);	1258	prepare_cede (aTHX_ &ta);
1123	break;	1259	break;
1124		1260
1125	case 4:	1261	case 4:
1126	{	1262	if (!prepare_cede_notself (aTHX_ &ta))
1127	SV *yieldstack;	1263	XSRETURN_EMPTY;
1128	SV *sv;
1129	AV *defav = GvAV (PL_defgv);
1130		1264
1131	yieldstack = *hv_fetch (
1132	(HV *)SvRV (GvSV (coro_current)),
1133	"yieldstack", sizeof ("yieldstack") - 1,
1134	0
1135	);
1136
1137	/* set up @_ -- ugly */
1138	av_clear (defav);
1139	av_fill (defav, items - 1);
1140	while (items--)
1141	av_store (defav, items, SvREFCNT_inc (ST(items)));
1142
1143	sv = av_pop ((AV *)SvRV (yieldstack));
1144	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1145	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1146	ta.flags = 0;
1147	SvREFCNT_dec (sv);
1148	}
1149	break;	1265	break;
1150
1151	}	1266	}
1152		1267
		1268	BARRIER;
1153	TRANSFER (ta);	1269	TRANSFER (ta);
1154	}
1155		1270
1156	void	1271	if (GIMME_V != G_VOID && ta.next != ta.prev)
1157	_clone_state_from (SV *dst, SV *src)	1272	XSRETURN_YES;
		1273	}
		1274
		1275	bool
		1276	_destroy (SV *coro_sv)
1158	CODE:	1277	CODE:
1159	{	1278	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1160	struct coro *coro_src = SvSTATE (src);	1279	OUTPUT:
1161		1280	RETVAL
1162	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1163
1164	++coro_src->refcnt;
1165	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1166	}
1167		1281
1168	void	1282	void
1169	_exit (code)	1283	_exit (code)
1170	int code	1284	int code
1171	PROTOTYPE: $	1285	PROTOTYPE: $
1172	CODE:	1286	CODE:
1173	_exit (code);	1287	_exit (code);
1174		1288
1175	int	1289	int
		1290	cctx_stacksize (int new_stacksize = 0)
		1291	CODE:
		1292	RETVAL = coro_stacksize;
		1293	if (new_stacksize)
		1294	coro_stacksize = new_stacksize;
		1295	OUTPUT:
		1296	RETVAL
		1297
		1298	int
1176	cctx_count ()	1299	cctx_count ()
1177	CODE:	1300	CODE:
1178	RETVAL = cctx_count;	1301	RETVAL = cctx_count;
1179	OUTPUT:	1302	OUTPUT:
1180	RETVAL	1303	RETVAL
…		…
1199	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1322	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1200	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1323	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1201	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1324	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1202	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1325	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1203		1326
1204	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1327	coro_current = get_sv ("Coro::current", FALSE);
1205	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1328	SvREADONLY_on (coro_current);
1206		1329
1207	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1330	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1208	coro_ready[i] = newAV ();	1331	coro_ready[i] = newAV ();
1209		1332
1210	{	1333	{
1211	SV *sv = perl_get_sv("Coro::API", 1);	1334	SV *sv = perl_get_sv("Coro::API", 1);
1212		1335
1213	coroapi.schedule = api_schedule;	1336	coroapi.schedule = api_schedule;
		1337	coroapi.save = api_save;
1214	coroapi.cede = api_cede;	1338	coroapi.cede = api_cede;
		1339	coroapi.cede_notself = api_cede_notself;
1215	coroapi.ready = api_ready;	1340	coroapi.ready = api_ready;
		1341	coroapi.is_ready = api_is_ready;
1216	coroapi.nready = &coro_nready;	1342	coroapi.nready = &coro_nready;
1217	coroapi.current = coro_current;	1343	coroapi.current = coro_current;
1218		1344
1219	GCoroAPI = &coroapi;	1345	GCoroAPI = &coroapi;
1220	sv_setiv (sv, (IV)&coroapi);	1346	sv_setiv (sv, (IV)&coroapi);
1221	SvREADONLY_on (sv);	1347	SvREADONLY_on (sv);
1222	}	1348	}
1223	}	1349	}
		1350
		1351	void
		1352	_set_current (SV *current)
		1353	PROTOTYPE: $
		1354	CODE:
		1355	SvREFCNT_dec (SvRV (coro_current));
		1356	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1224		1357
1225	int	1358	int
1226	prio (Coro::State coro, int newprio = 0)	1359	prio (Coro::State coro, int newprio = 0)
1227	ALIAS:	1360	ALIAS:
1228	nice = 1	1361	nice = 1
…		…
1231	RETVAL = coro->prio;	1364	RETVAL = coro->prio;
1232		1365
1233	if (items > 1)	1366	if (items > 1)
1234	{	1367	{
1235	if (ix)	1368	if (ix)
1236	newprio += coro->prio;	1369	newprio = coro->prio - newprio;
1237		1370
1238	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1371	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1239	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1372	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1240		1373
1241	coro->prio = newprio;	1374	coro->prio = newprio;
1242	}	1375	}
1243	}	1376	}
		1377	OUTPUT:
		1378	RETVAL
1244		1379
1245	void	1380	SV *
1246	ready (SV *self)	1381	ready (SV *self)
1247	PROTOTYPE: $	1382	PROTOTYPE: $
1248	CODE:	1383	CODE:
1249	api_ready (self);	1384	RETVAL = boolSV (api_ready (self));
		1385	OUTPUT:
		1386	RETVAL
		1387
		1388	SV *
		1389	is_ready (SV *self)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	RETVAL = boolSV (api_is_ready (self));
		1393	OUTPUT:
		1394	RETVAL
1250		1395
1251	int	1396	int
1252	nready (...)	1397	nready (...)
1253	PROTOTYPE:	1398	PROTOTYPE:
1254	CODE:	1399	CODE:
…		…
1260		1405
1261	SV *	1406	SV *
1262	_get_state ()	1407	_get_state ()
1263	CODE:	1408	CODE:
1264	{	1409	{
1265	struct {	1410	struct io_state *data;
1266	int errorno;
1267	int laststype;
1268	int laststatval;
1269	Stat_t statcache;
1270	} data;
1271		1411
		1412	RETVAL = newSV (sizeof (struct io_state));
		1413	data = (struct io_state *)SvPVX (RETVAL);
		1414	SvCUR_set (RETVAL, sizeof (struct io_state));
		1415	SvPOK_only (RETVAL);
		1416
1272	data.errorno = errno;	1417	data->errorno = errno;
1273	data.laststype = PL_laststype;	1418	data->laststype = PL_laststype;
1274	data.laststatval = PL_laststatval;	1419	data->laststatval = PL_laststatval;
1275	data.statcache = PL_statcache;	1420	data->statcache = PL_statcache;
1276
1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
1278	}	1421	}
1279	OUTPUT:	1422	OUTPUT:
1280	RETVAL	1423	RETVAL
1281		1424
1282	void	1425	void
1283	_set_state (char *data_)	1426	_set_state (char *data_)
1284	PROTOTYPE: $	1427	PROTOTYPE: $
1285	CODE:	1428	CODE:
1286	{	1429	{
1287	struct {	1430	struct io_state *data = (void *)data_;
1288	int errorno;
1289	int laststype;
1290	int laststatval;
1291	Stat_t statcache;
1292	} *data = (void *)data_;
1293		1431
1294	errno = data->errorno;	1432	errno = data->errorno;
1295	PL_laststype = data->laststype;	1433	PL_laststype = data->laststype;
1296	PL_laststatval = data->laststatval;	1434	PL_laststatval = data->laststatval;
1297	PL_statcache = data->statcache;	1435	PL_statcache = data->statcache;
1298	}	1436	}
		1437

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