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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.118 by root, Fri Dec 1 19:58:53 2006 UTC vs.
Revision 1.154 by root, Fri Sep 21 01:08:06 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	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		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
77	/* 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
78	* 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
79	* and should be unique. */	95	* and should be unique. */
80	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
82		98
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		100
85	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
87	#else	104	#else
88	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
89	#endif	107	#endif
90		108
91	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
92		110
93	#include "CoroAPI.h"	111	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		112
97	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	117	#else
102	# define LOCK (void)0	118	# define LOCK (void)0
103	# define UNLOCK (void)0	119	# define UNLOCK (void)0
104	#endif	120	#endif
105		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;
106	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
107	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
108	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
109	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
110		137
111	static struct coro_cctx *cctx_first;	138	static struct coro_cctx *cctx_first;
112	static int cctx_count, cctx_idle;	139	static int cctx_count, cctx_idle;
…		…
115	typedef struct coro_cctx {	142	typedef struct coro_cctx {
116	struct coro_cctx *next;	143	struct coro_cctx *next;
117		144
118	/* the stack */	145	/* the stack */
119	void *sptr;	146	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
121		148
122	/* cpu state */	149	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	152	JMPENV *top_env;
125	coro_context cctx;	153	coro_context cctx;
126		154
127	int inuse;
128
129	#if USE_VALGRIND	155	#if CORO_USE_VALGRIND
130	int valgrind_id;	156	int valgrind_id;
131	#endif	157	#endif
		158	char inuse, mapped;
132	} coro_cctx;	159	} coro_cctx;
133		160
134	enum {	161	enum {
135	CF_RUNNING = 0x0001, /* coroutine is running */	162	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY = 0x0002, /* coroutine is ready */	163	CF_READY = 0x0002, /* coroutine is ready */
137	CF_NEW = 0x0004, /* ahs never been switched to */	164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138	};	166	};
139		167
140	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
141	struct coro {	169	struct coro {
142	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
143	coro_cctx *cctx;	171	coro_cctx *cctx;
144		172
145	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
146	AV *args;	174	AV *args;
147	int refcnt;	175	int refcnt;
148	int flags;	176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
149		178
150	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
151	AV *defav;	180	AV *defav; /* @_ */
152	SV *defsv;	181	SV *defsv; /* $_ */
153	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
154		186
155	#define VAR(name,type) type name;	187	#define VAR(name,type) type name;
156	# include "state.h"	188	# include "state.h"
157	#undef VAR	189	#undef VAR
158		190
159	/* coro process data */	191	/* coro process data */
160	int prio;	192	int prio;
		193
		194	/* linked list */
		195	struct coro *next, *prev;
		196	HV *hv; /* the perl hash associated with this coro, if any */
161	};	197	};
162		198
163	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
165		201
		202	/** Coro ********************************************************************/
		203
		204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *coro_first;
		216
		217	/** lowlevel stuff **********************************************************/
		218
166	static AV *	219	static AV *
167	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
168	{	221	{
169	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
171		224
172	newpadlist = newAV ();	225	newpadlist = newAV ();
…		…
184		237
185	return newpadlist;	238	return newpadlist;
186	}	239	}
187		240
188	static void	241	static void
189	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
190	{	243	{
191	/* may be during global destruction */	244	/* may be during global destruction */
192	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
193	{	246	{
194	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	268	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
217		270
218	/* casting is fun. */	271	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
221		274
222	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
223		276
224	return 0;	277	return 0;
225	}	278	}
…		…
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
236	: 0	289	: 0
237		290
238	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
239	static void	292	static void
240	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
241	{	294	{
242	MAGIC *mg = CORO_MAGIC (cv);	295	MAGIC *mg = CORO_MAGIC (cv);
243	AV *av;	296	AV *av;
244		297
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	300	else
248	{	301	{
249	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
255	#else	308	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	310	#endif
258	}	311	}
259	}	312	}
260		313
261	static void	314	static void
262	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
263	{	316	{
264	MAGIC *mg = CORO_MAGIC (cv);	317	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	318	AV *av;
266		319
267	if (!mg)	320	if (!mg)
…		…
278	av_extend (av, AvMAX (av) + 1);	331	av_extend (av, AvMAX (av) + 1);
279		332
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	334	}
282		335
		336	/** load & save, init *******************************************************/
		337
283	#define SB do {	338	#define SB do {
284	#define SE } while (0)	339	#define SE } while (0)
285		340
286	#define LOAD(state) load_state ((state))
287	#define SAVE(state,flags) save_state ((state),(flags))
288
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290		342
291	static void	343	static void
292	load_state (Coro__State c)	344	load_perl (pTHX_ Coro__State c)
293	{	345	{
294	#define VAR(name,type) PL_ ## name = c->name;	346	#define VAR(name,type) PL_ ## name = c->name;
295	# include "state.h"	347	# include "state.h"
296	#undef VAR	348	#undef VAR
297		349
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
301		369
302	{	370	{
303	dSP;	371	dSP;
304	CV *cv;	372	CV *cv;
305		373
306	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
308	{	376	{
309	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	378	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	379	CvPADLIST (cv) = (AV *)POPs;
312	}	380	}
313		381
314	PUTBACK;	382	PUTBACK;
315	}	383	}
316	}	384	}
317		385
318	static void	386	static void
319	save_state (Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
320	{	388	{
321	{	389	{
322	dSP;	390	dSP;
323	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
327	/*	395	/*
328	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
329	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
330	*/	398	*/
331		399
		400	EXTEND (SP, 3 + 1);
332	PUSHs (Nullsv);	401	PUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
334	for (;;)	403	for (;;)
335	{	404	{
336	while (cxix >= 0)	405	while (cxix >= 0)
337	{	406	{
338	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
339		408
340	if (CxTYPE (cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
341	{	410	{
342	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
343		412
344	if (CvDEPTH (cv))	413	if (CvDEPTH (cv))
345	{	414	{
346	EXTEND (SP, 3);	415	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	416	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
351		419
352	CvDEPTH (cv) = 0;	420	CvDEPTH (cv) = 0;
353	get_padlist (cv);	421	get_padlist (aTHX_ cv);
354	}	422	}
355	}	423	}
356	#ifdef CXt_FORMAT
357	else if (CxTYPE (cx) == CXt_FORMAT)
358	{
359	/* I never used formats, so how should I know how these are implemented? */
360	/* my bold guess is as a simple, plain sub... */
361	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362	}
363	#endif
364	}	424	}
365		425
366	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
367	break;	427	break;
368		428
…		…
372	}	432	}
373		433
374	PUTBACK;	434	PUTBACK;
375	}	435	}
376		436
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
380		442
381	#define VAR(name,type)c->name = PL_ ## name;	443	#define VAR(name,type)c->name = PL_ ## name;
382	# include "state.h"	444	# include "state.h"
383	#undef VAR	445	#undef VAR
384	}	446	}
…		…
387	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
391	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
392	static void	457	static void
393	coro_init_stacks ()	458	coro_init_stacks (pTHX)
394	{	459	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	460	PL_curstackinfo = new_stackinfo(64, 4);
396	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399		464
400	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
401	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403		468
404	New(50,PL_tmps_stack,128,SV*);	469	New(50,PL_tmps_stack,64,SV*);
405	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
406	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
407	PL_tmps_max = 128;	472	PL_tmps_max = 64;
408		473
409	New(54,PL_markstack,32,I32);	474	New(54,PL_markstack,16,I32);
410	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
411	PL_markstack_max = PL_markstack + 32;	476	PL_markstack_max = PL_markstack + 16;
412		477
413	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
414	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
415	#endif	480	#endif
416		481
417	New(54,PL_scopestack,32,I32);	482	New(54,PL_scopestack,16,I32);
418	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
419	PL_scopestack_max = 32;	484	PL_scopestack_max = 16;
420		485
421	New(54,PL_savestack,64,ANY);	486	New(54,PL_savestack,32,ANY);
422	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
423	PL_savestack_max = 64;	488	PL_savestack_max = 32;
424		489
425	#if !PERL_VERSION_ATLEAST (5,9,0)	490	#if !PERL_VERSION_ATLEAST (5,9,0)
426	New(54,PL_retstack,16,OP*);	491	New(54,PL_retstack,8,OP*);
427	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	493	PL_retstack_max = 8;
429	#endif	494	#endif
430	}	495	}
		496	#endif
431		497
432	/*	498	/*
433	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
434	*/	500	*/
435	static void	501	static void
436	coro_destroy_stacks ()	502	coro_destroy_stacks (pTHX)
437	{	503	{
438	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
439	{	505	{
440	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
441	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
442		509
443	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
444	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
445		513
		514	/* unwind all extra stacks */
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
447	}	519	}
448		520
449	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
451		523
452	while (PL_curstackinfo)	524	while (PL_curstackinfo)
453	{	525	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
455		527
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		530
468	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	533	PL_curstackinfo = p;
471	}	534	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	540	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	541	Safefree (PL_retstack);
479	#endif	542	#endif
480	}	543	}
481		544
		545	static size_t
		546	coro_rss (struct coro *coro)
		547	{
		548	size_t rss = sizeof (coro);
		549
		550	if (coro->mainstack)
		551	{
		552	if (coro->flags & CF_RUNNING)
		553	{
		554	#define VAR(name,type)coro->name = PL_ ## name;
		555	# include "state.h"
		556	#undef VAR
		557	}
		558
		559	rss += sizeof (coro->curstackinfo);
		560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		561	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		562	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		563	rss += coro->tmps_max * sizeof (SV *);
		564	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		565	rss += coro->scopestack_max * sizeof (I32);
		566	rss += coro->savestack_max * sizeof (ANY);
		567
		568	#if !PERL_VERSION_ATLEAST (5,9,0)
		569	rss += coro->retstack_max * sizeof (OP *);
		570	#endif
		571	}
		572
		573	return rss;
		574	}
		575
		576	/** coroutine stack handling ************************************************/
		577
482	static void	578	static void
483	setup_coro (struct coro *coro)	579	setup_coro (pTHX_ struct coro *coro)
484	{	580	{
485	/*	581	/*
486	* emulate part of the perl startup here.	582	* emulate part of the perl startup here.
487	*/	583	*/
488
489	coro_init_stacks ();	584	coro_init_stacks (aTHX);
490		585
491	PL_curcop = &PL_compiling;	586	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	587	PL_in_eval = EVAL_NULL;
		588	PL_comppad = 0;
493	PL_curpm = 0;	589	PL_curpm = 0;
494	PL_localizing = 0;	590	PL_localizing = 0;
495	PL_dirty = 0;	591	PL_dirty = 0;
496	PL_restartop = 0;	592	PL_restartop = 0;
497		593
498	{	594	{
499	dSP;	595	dSP;
500	LOGOP myop;	596	LOGOP myop;
501		597
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));	598	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;	599	GvAV (PL_defgv) = coro->args; coro->args = 0;
507		600
508	Zero (&myop, 1, LOGOP);	601	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	602	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID;
511		604
		605	PUSHMARK (SP);
		606	XPUSHs (av_shift (GvAV (PL_defgv)));
		607	PUTBACK;
512	PL_op = (OP *)&myop;	608	PL_op = (OP *)&myop;
513
514	PUSHMARK (SP);
515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516	PUTBACK;
517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	609	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	610	SPAGAIN;
519	}	611	}
520		612
521	ENTER; /* necessary e.g. for dounwind */	613	ENTER; /* necessary e.g. for dounwind */
522	}	614	}
523		615
524	static void	616	static void
525	free_coro_mortal ()	617	free_coro_mortal (pTHX)
526	{	618	{
527	if (coro_mortal)	619	if (coro_mortal)
528	{	620	{
529	SvREFCNT_dec (coro_mortal);	621	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	622	coro_mortal = 0;
531	}	623	}
532	}	624	}
533		625
		626	/* inject a fake call to Coro::State::_cctx_init into the execution */
		627	/* _cctx_init should be careful, as it could be called at almost any time */
		628	/* during execution of a perl program */
534	static void NOINLINE	629	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	630	prepare_cctx (pTHX_ coro_cctx *cctx)
536	{	631	{
537	dSP;	632	dSP;
538	LOGOP myop;	633	LOGOP myop;
539		634
540	Zero (&myop, 1, LOGOP);	635	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	636	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	637	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		638
546	PUSHMARK (SP);	639	PUSHMARK (SP);
		640	EXTEND (SP, 2);
		641	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	642	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	643	PUTBACK;
		644	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	646	SPAGAIN;
551	}	647	}
552		648
		649	/*
		650	* this is a _very_ stripped down perl interpreter ;)
		651	*/
553	static void	652	static void
554	coro_run (void *arg)	653	coro_run (void *arg)
555	{	654	{
		655	dTHX;
		656
556	/* coro_run is the alternative epilogue of transfer() */	657	/* coro_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	658	UNLOCK;
558		659
		660	PL_top_env = &PL_start_env;
		661
		662	/* inject a fake subroutine call to cctx_init */
		663	prepare_cctx (aTHX_ (coro_cctx *)arg);
		664
		665	/* somebody or something will hit me for both perl_run and PL_restartop */
		666	PL_restartop = PL_op;
		667	perl_run (PL_curinterp);
		668
559	/*	669	/*
560	* this is a _very_ stripped down perl interpreter ;)	670	* If perl-run returns we assume exit() was being called or the coro
		671	* fell off the end, which seems to be the only valid (non-bug)
		672	* reason for perl_run to return. We try to exit by jumping to the
		673	* bootstrap-time "top" top_env, as we cannot restore the "main"
		674	* coroutine as Coro has no such concept
561	*/	675	*/
562	PL_top_env = &PL_start_env;	676	PL_top_env = main_top_env;
563		677	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
564	/* inject call to cctx_init */
565	prepare_cctx ((coro_cctx *)arg);
566
567	/* somebody will hit me for both perl_run and PL_restartop */
568	perl_run (PL_curinterp);
569
570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571	abort ();
572	}	678	}
573		679
574	static coro_cctx *	680	static coro_cctx *
575	cctx_new ()	681	cctx_new ()
576	{	682	{
577	coro_cctx *cctx;	683	coro_cctx *cctx;
		684	void *stack_start;
		685	size_t stack_size;
578		686
579	++cctx_count;	687	++cctx_count;
580		688
581	New (0, cctx, 1, coro_cctx);	689	Newz (0, cctx, 1, coro_cctx);
582		690
583	#if HAVE_MMAP	691	#if HAVE_MMAP
584		692
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	693	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	694	/* mmap supposedly does allocate-on-write for us */
587	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	695	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		696
589	if (cctx->sptr == (void *)-1)	697	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	698	{
594
595	# if STACKGUARD	699	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	700	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	701	# endif
		702	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		703	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		704	cctx->mapped = 1;
		705	}
		706	else
		707	#endif
		708	{
		709	cctx->ssize = coro_stacksize * (long)sizeof (long);
		710	New (0, cctx->sptr, coro_stacksize, long);
598		711
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	712	if (!cctx->sptr)
605	{	713	{
606	perror ("FATAL: unable to malloc stack for coroutine");	714	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	715	_exit (EXIT_FAILURE);
608	}	716	}
609		717
610	#endif	718	stack_start = cctx->sptr;
		719	stack_size = cctx->ssize;
		720	}
611		721
612	#if USE_VALGRIND	722	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
613	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615	cctx->ssize + (char *)cctx->sptr
616	);
617	#endif
618
619	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	723	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
620		724
621	return cctx;	725	return cctx;
622	}	726	}
623		727
624	static void	728	static void
…		…
627	if (!cctx)	731	if (!cctx)
628	return;	732	return;
629		733
630	--cctx_count;	734	--cctx_count;
631		735
632	#if USE_VALGRIND	736	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	737	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	738	#endif
635		739
636	#if HAVE_MMAP	740	#if HAVE_MMAP
		741	if (cctx->mapped)
637	munmap (cctx->sptr, cctx->ssize);	742	munmap (cctx->sptr, cctx->ssize);
638	#else	743	else
		744	#endif
639	Safefree (cctx->sptr);	745	Safefree (cctx->sptr);
640	#endif
641		746
642	Safefree (cctx);	747	Safefree (cctx);
643	}	748	}
644		749
645	static coro_cctx *	750	static coro_cctx *
646	cctx_get ()	751	cctx_get (pTHX)
647	{	752	{
648	coro_cctx *cctx;
649
650	if (cctx_first)	753	while (cctx_first)
651	{	754	{
652	cctx = cctx_first;	755	coro_cctx *cctx = cctx_first;
653	cctx_first = cctx->next;	756	cctx_first = cctx->next;
654	--cctx_idle;	757	--cctx_idle;
		758
		759	if (cctx->ssize >= coro_stacksize)
		760	return cctx;
		761
		762	cctx_destroy (cctx);
655	}	763	}
656	else	764
657	{
658	cctx = cctx_new ();
659	PL_op = PL_op->op_next;	765	PL_op = PL_op->op_next;
660	}
661
662	return cctx;	766	return cctx_new ();
663	}	767	}
664		768
665	static void	769	static void
666	cctx_put (coro_cctx *cctx)	770	cctx_put (coro_cctx *cctx)
667	{	771	{
…		…
679	++cctx_idle;	783	++cctx_idle;
680	cctx->next = cctx_first;	784	cctx->next = cctx_first;
681	cctx_first = cctx;	785	cctx_first = cctx;
682	}	786	}
683		787
		788	/** coroutine switching *****************************************************/
		789
684	/* never call directly, always through the coro_state_transfer global variable */	790	/* never call directly, always through the coro_state_transfer global variable */
685	static void NOINLINE	791	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	792	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	793	{
688	dSTACKLEVEL;	794	dSTACKLEVEL;
689		795
690	/* sometimes transfer is only called to set idle_sp */	796	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	797	if (!next)
		798	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	799	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		800	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		801	}
693	else if (prev != next)	802	else if (prev != next)
694	{	803	{
695	coro_cctx *prev__cctx;	804	coro_cctx *prev__cctx;
696		805
697	if (prev->flags & CF_NEW)	806	if (prev->flags & CF_NEW)
…		…
708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	817	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709		818
710	if (next->flags & CF_RUNNING)	819	if (next->flags & CF_RUNNING)
711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	820	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712		821
		822	if (next->flags & CF_DESTROYED)
		823	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		824
713	prev->flags &= ~CF_RUNNING;	825	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	826	next->flags |= CF_RUNNING;
715		827
716	LOCK;	828	LOCK;
717		829
718	if (next->flags & CF_NEW)	830	if (next->flags & CF_NEW)
719	{	831	{
720	/* need to start coroutine */	832	/* need to start coroutine */
721	next->flags &= ~CF_NEW;	833	next->flags &= ~CF_NEW;
722	/* first get rid of the old state */	834	/* first get rid of the old state */
723	SAVE (prev, -1);	835	save_perl (aTHX_ prev);
724	/* setup coroutine call */	836	/* setup coroutine call */
725	setup_coro (next);	837	setup_coro (aTHX_ next);
726	/* need a new stack */	838	/* need a new stack */
727	assert (!next->stack);	839	assert (!next->cctx);
728	}	840	}
729	else	841	else
730	{	842	{
731	/* coroutine already started */	843	/* coroutine already started */
732	SAVE (prev, flags);	844	save_perl (aTHX_ prev);
733	LOAD (next);	845	load_perl (aTHX_ next);
734	}	846	}
735		847
736	prev__cctx = prev->cctx;	848	prev__cctx = prev->cctx;
737		849
738	/* possibly "free" the cctx */	850	/* possibly "free" the cctx */
739	if (prev__cctx->idle_sp == STACKLEVEL && 0)	851	if (prev__cctx->idle_sp == STACKLEVEL)
740	{	852	{
741	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	853	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742	assert (PL_top_env == prev__cctx->top_env);	854	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
743		855
744	prev->cctx = 0;	856	prev->cctx = 0;
745		857
746	cctx_put (prev__cctx);	858	cctx_put (prev__cctx);
747	prev__cctx->inuse = 0;	859	prev__cctx->inuse = 0;
748	}	860	}
749		861
750	if (!next->cctx)	862	if (!next->cctx)
751	{	863	{
752	next->cctx = cctx_get ();	864	next->cctx = cctx_get (aTHX);
753	assert (!next->cctx->inuse);	865	assert (!next->cctx->inuse);
754	next->cctx->inuse = 1;	866	next->cctx->inuse = 1;
755	}	867	}
756		868
757	if (prev__cctx != next->cctx)	869	if (prev__cctx != next->cctx)
…		…
759	prev__cctx->top_env = PL_top_env;	871	prev__cctx->top_env = PL_top_env;
760	PL_top_env = next->cctx->top_env;	872	PL_top_env = next->cctx->top_env;
761	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	873	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762	}	874	}
763		875
764	free_coro_mortal ();	876	free_coro_mortal (aTHX);
765
766	UNLOCK;	877	UNLOCK;
767	}	878	}
768	}	879	}
769		880
770	struct transfer_args	881	struct transfer_args
771	{	882	{
772	struct coro *prev, *next;	883	struct coro *prev, *next;
773	int flags;
774	};	884	};
775		885
776	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	886	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
777		887
		888	/** high level stuff ********************************************************/
		889
778	static void	890	static int
779	coro_state_destroy (struct coro *coro)	891	coro_state_destroy (pTHX_ struct coro *coro)
780	{	892	{
781	if (coro->refcnt--)	893	if (coro->flags & CF_DESTROYED)
782	return;	894	return 0;
		895
		896	coro->flags |= CF_DESTROYED;
		897
		898	if (coro->flags & CF_READY)
		899	{
		900	/* reduce nready, as destroying a ready coro effectively unreadies it */
		901	/* alternative: look through all ready queues and remove the coro */
		902	LOCK;
		903	--coro_nready;
		904	UNLOCK;
		905	}
		906	else
		907	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
783		908
784	if (coro->mainstack && coro->mainstack != main_mainstack)	909	if (coro->mainstack && coro->mainstack != main_mainstack)
785	{	910	{
786	struct coro temp;	911	struct coro temp;
		912
		913	assert (!(coro->flags & CF_RUNNING));
		914
		915	Zero (&temp, 1, struct coro);
		916	temp.save = CORO_SAVE_ALL;
787		917
788	if (coro->flags & CF_RUNNING)	918	if (coro->flags & CF_RUNNING)
789	croak ("FATAL: tried to destroy currently running coroutine");	919	croak ("FATAL: tried to destroy currently running coroutine");
790		920
791	SAVE ((&temp), TRANSFER_SAVE_ALL);	921	save_perl (aTHX_ &temp);
792	LOAD (coro);	922	load_perl (aTHX_ coro);
793		923
794	coro_destroy_stacks ();	924	coro_destroy_stacks (aTHX);
795		925
796	LOAD ((&temp)); /* this will get rid of defsv etc.. */	926	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
797		927
798	coro->mainstack = 0;	928	coro->mainstack = 0;
799	}	929	}
800		930
801	cctx_destroy (coro->cctx);	931	cctx_destroy (coro->cctx);
802	SvREFCNT_dec (coro->args);	932	SvREFCNT_dec (coro->args);
803	Safefree (coro);	933
		934	if (coro->next) coro->next->prev = coro->prev;
		935	if (coro->prev) coro->prev->next = coro->next;
		936	if (coro == coro_first) coro_first = coro->next;
		937
		938	return 1;
804	}	939	}
805		940
806	static int	941	static int
807	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	942	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808	{	943	{
809	struct coro *coro = (struct coro *)mg->mg_ptr;	944	struct coro *coro = (struct coro *)mg->mg_ptr;
810	mg->mg_ptr = 0;	945	mg->mg_ptr = 0;
811		946
		947	coro->hv = 0;
		948
		949	if (--coro->refcnt < 0)
		950	{
812	coro_state_destroy (coro);	951	coro_state_destroy (aTHX_ coro);
		952	Safefree (coro);
		953	}
813		954
814	return 0;	955	return 0;
815	}	956	}
816		957
817	static int	958	static int
…		…
824	return 0;	965	return 0;
825	}	966	}
826		967
827	static MGVTBL coro_state_vtbl = {	968	static MGVTBL coro_state_vtbl = {
828	0, 0, 0, 0,	969	0, 0, 0, 0,
829	coro_state_clear,	970	coro_state_free,
830	0,	971	0,
831	#ifdef MGf_DUP	972	#ifdef MGf_DUP
832	coro_state_dup,	973	coro_state_dup,
833	#else	974	#else
834	# define MGf_DUP 0	975	# define MGf_DUP 0
835	#endif	976	#endif
836	};	977	};
837		978
838	static struct coro *	979	static struct coro *
839	SvSTATE (SV *coro)	980	SvSTATE_ (pTHX_ SV *coro)
840	{	981	{
841	HV *stash;	982	HV *stash;
842	MAGIC *mg;	983	MAGIC *mg;
843		984
844	if (SvROK (coro))	985	if (SvROK (coro))
…		…
850	/* very slow, but rare, check */	991	/* very slow, but rare, check */
851	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	992	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852	croak ("Coro::State object required");	993	croak ("Coro::State object required");
853	}	994	}
854		995
855	mg = SvMAGIC (coro);	996	mg = CORO_MAGIC (coro);
856	assert (mg->mg_type == PERL_MAGIC_ext);
857	return (struct coro *)mg->mg_ptr;	997	return (struct coro *)mg->mg_ptr;
858	}	998	}
859		999
		1000	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1001
860	static void	1002	static void
861	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1003	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
862	{	1004	{
863	ta->prev = SvSTATE (prev);	1005	ta->prev = SvSTATE (prev_sv);
864	ta->next = SvSTATE (next);	1006	ta->next = SvSTATE (next_sv);
865	ta->flags = flags;
866	}	1007	}
867		1008
868	static void	1009	static void
869	api_transfer (SV *prev, SV *next, int flags)	1010	api_transfer (SV *prev_sv, SV *next_sv)
870	{	1011	{
		1012	dTHX;
871	struct transfer_args ta;	1013	struct transfer_args ta;
872		1014
873	prepare_transfer (&ta, prev, next, flags);	1015	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874	TRANSFER (ta);	1016	TRANSFER (ta);
875	}	1017	}
876		1018
		1019	static int
		1020	api_save (SV *coro_sv, int new_save)
		1021	{
		1022	dTHX;
		1023	struct coro *coro = SvSTATE (coro_sv);
		1024	int old_save = coro->save;
		1025
		1026	if (new_save >= 0)
		1027	coro->save = new_save;
		1028
		1029	return old_save;
		1030	}
		1031
877	/** Coro ********************************************************************/	1032	/** Coro ********************************************************************/
878		1033
879	#define PRIO_MAX 3
880	#define PRIO_HIGH 1
881	#define PRIO_NORMAL 0
882	#define PRIO_LOW -1
883	#define PRIO_IDLE -3
884	#define PRIO_MIN -4
885
886	/* for Coro.pm */
887	static SV *coro_current;
888	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889	static int coro_nready;
890
891	static void	1034	static void
892	coro_enq (SV *coro_sv)	1035	coro_enq (pTHX_ SV *coro_sv)
893	{	1036	{
894	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1037	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
895	coro_nready++;
896	}	1038	}
897		1039
898	static SV *	1040	static SV *
899	coro_deq (int min_prio)	1041	coro_deq (pTHX_ int min_prio)
900	{	1042	{
901	int prio = PRIO_MAX - PRIO_MIN;	1043	int prio = PRIO_MAX - PRIO_MIN;
902		1044
903	min_prio -= PRIO_MIN;	1045	min_prio -= PRIO_MIN;
904	if (min_prio < 0)	1046	if (min_prio < 0)
905	min_prio = 0;	1047	min_prio = 0;
906		1048
907	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1049	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
908	if (AvFILLp (coro_ready [prio]) >= 0)	1050	if (AvFILLp (coro_ready [prio]) >= 0)
909	{
910	coro_nready--;
911	return av_shift (coro_ready [prio]);	1051	return av_shift (coro_ready [prio]);
912	}
913		1052
914	return 0;	1053	return 0;
915	}	1054	}
916		1055
917	static int	1056	static int
918	api_ready (SV *coro_sv)	1057	api_ready (SV *coro_sv)
919	{	1058	{
		1059	dTHX;
920	struct coro *coro;	1060	struct coro *coro;
921		1061
922	if (SvROK (coro_sv))	1062	if (SvROK (coro_sv))
923	coro_sv = SvRV (coro_sv);	1063	coro_sv = SvRV (coro_sv);
924		1064
925	coro = SvSTATE (coro_sv);	1065	coro = SvSTATE (coro_sv);
926		1066
927	if (coro->flags & CF_READY)	1067	if (coro->flags & CF_READY)
928	return 0;	1068	return 0;
929		1069
930	#if 0 /* this is actually harmless */
931	if (coro->flags & CF_RUNNING)
932	croak ("Coro::ready called on currently running coroutine");
933	#endif
934
935	coro->flags |= CF_READY;	1070	coro->flags |= CF_READY;
936		1071
937	LOCK;	1072	LOCK;
938	coro_enq (SvREFCNT_inc (coro_sv));	1073	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1074	++coro_nready;
939	UNLOCK;	1075	UNLOCK;
940		1076
941	return 1;	1077	return 1;
942	}	1078	}
943		1079
944	static int	1080	static int
945	api_is_ready (SV *coro_sv)	1081	api_is_ready (SV *coro_sv)
946	{	1082	{
		1083	dTHX;
947	return !!SvSTATE (coro_sv)->flags & CF_READY;	1084	return !!(SvSTATE (coro_sv)->flags & CF_READY);
948	}	1085	}
949		1086
950	static void	1087	static void
951	prepare_schedule (struct transfer_args *ta)	1088	prepare_schedule (pTHX_ struct transfer_args *ta)
952	{	1089	{
953	SV *prev, *next;	1090	SV *prev_sv, *next_sv;
954		1091
955	for (;;)	1092	for (;;)
956	{	1093	{
957	LOCK;	1094	LOCK;
958	next = coro_deq (PRIO_MIN);	1095	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1096
		1097	/* nothing to schedule: call the idle handler */
		1098	if (!next_sv)
		1099	{
		1100	dSP;
		1101	UNLOCK;
		1102
		1103	ENTER;
		1104	SAVETMPS;
		1105
		1106	PUSHMARK (SP);
		1107	PUTBACK;
		1108	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1109
		1110	FREETMPS;
		1111	LEAVE;
		1112	continue;
		1113	}
		1114
		1115	ta->next = SvSTATE (next_sv);
		1116
		1117	/* cannot transfer to destroyed coros, skip and look for next */
		1118	if (ta->next->flags & CF_DESTROYED)
		1119	{
		1120	UNLOCK;
		1121	SvREFCNT_dec (next_sv);
		1122	/* coro_nready is already taken care of by destroy */
		1123	continue;
		1124	}
		1125
		1126	--coro_nready;
959	UNLOCK;	1127	UNLOCK;
960
961	if (next)
962	break;	1128	break;
963
964	{
965	dSP;
966
967	ENTER;
968	SAVETMPS;
969
970	PUSHMARK (SP);
971	PUTBACK;
972	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974	FREETMPS;
975	LEAVE;
976	}	1129	}
977	}
978
979	prev = SvRV (coro_current);
980	SvRV_set (coro_current, next);
981		1130
982	/* free this only after the transfer */	1131	/* free this only after the transfer */
		1132	prev_sv = SvRV (coro_current);
		1133	SvRV_set (coro_current, next_sv);
		1134	ta->prev = SvSTATE (prev_sv);
		1135
		1136	assert (ta->next->flags & CF_READY);
		1137	ta->next->flags &= ~CF_READY;
		1138
983	LOCK;	1139	LOCK;
984	free_coro_mortal ();	1140	free_coro_mortal (aTHX);
		1141	coro_mortal = prev_sv;
985	UNLOCK;	1142	UNLOCK;
986	coro_mortal = prev;
987
988	assert (!SvROK(prev));//D
989	assert (!SvROK(next));//D
990
991	ta->prev = SvSTATE (prev);
992	ta->next = SvSTATE (next);
993	ta->flags = TRANSFER_SAVE_ALL;
994
995	assert (ta->flags & CF_READY);
996	ta->next->flags &= ~CF_READY;
997	}	1143	}
998		1144
999	static void	1145	static void
1000	prepare_cede (struct transfer_args *ta)	1146	prepare_cede (pTHX_ struct transfer_args *ta)
1001	{	1147	{
1002	api_ready (coro_current);	1148	api_ready (coro_current);
1003
1004	prepare_schedule (ta);	1149	prepare_schedule (aTHX_ ta);
		1150	}
		1151
		1152	static int
		1153	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1154	{
		1155	if (coro_nready)
		1156	{
		1157	SV *prev = SvRV (coro_current);
		1158	prepare_schedule (aTHX_ ta);
		1159	api_ready (prev);
		1160	return 1;
		1161	}
		1162	else
		1163	return 0;
1005	}	1164	}
1006		1165
1007	static void	1166	static void
1008	api_schedule (void)	1167	api_schedule (void)
1009	{	1168	{
		1169	dTHX;
1010	struct transfer_args ta;	1170	struct transfer_args ta;
1011		1171
1012	prepare_schedule (&ta);	1172	prepare_schedule (aTHX_ &ta);
1013	TRANSFER (ta);	1173	TRANSFER (ta);
1014	}	1174	}
1015		1175
1016	static void	1176	static int
1017	api_cede (void)	1177	api_cede (void)
1018	{	1178	{
		1179	dTHX;
1019	struct transfer_args ta;	1180	struct transfer_args ta;
1020		1181
1021	prepare_cede (&ta);	1182	prepare_cede (aTHX_ &ta);
		1183
		1184	if (ta.prev != ta.next)
		1185	{
1022	TRANSFER (ta);	1186	TRANSFER (ta);
		1187	return 1;
		1188	}
		1189	else
		1190	return 0;
		1191	}
		1192
		1193	static int
		1194	api_cede_notself (void)
		1195	{
		1196	dTHX;
		1197	struct transfer_args ta;
		1198
		1199	if (prepare_cede_notself (aTHX_ &ta))
		1200	{
		1201	TRANSFER (ta);
		1202	return 1;
		1203	}
		1204	else
		1205	return 0;
1023	}	1206	}
1024		1207
1025	MODULE = Coro::State PACKAGE = Coro::State	1208	MODULE = Coro::State PACKAGE = Coro::State
1026		1209
1027	PROTOTYPES: DISABLE	1210	PROTOTYPES: DISABLE
…		…
1033	#endif	1216	#endif
1034	BOOT_PAGESIZE;	1217	BOOT_PAGESIZE;
1035		1218
1036	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1219	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037		1220
1038	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1040	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1223	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1224	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1225	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1226	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1227	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1041		1228
1042	main_mainstack = PL_mainstack;	1229	main_mainstack = PL_mainstack;
		1230	main_top_env = PL_top_env;
		1231
		1232	while (main_top_env->je_prev)
		1233	main_top_env = main_top_env->je_prev;
1043		1234
1044	coroapi.ver = CORO_API_VERSION;	1235	coroapi.ver = CORO_API_VERSION;
1045	coroapi.transfer = api_transfer;	1236	coroapi.transfer = api_transfer;
1046		1237
1047	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1238	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1055	HV *hv;	1246	HV *hv;
1056	int i;	1247	int i;
1057		1248
1058	Newz (0, coro, 1, struct coro);	1249	Newz (0, coro, 1, struct coro);
1059	coro->args = newAV ();	1250	coro->args = newAV ();
		1251	coro->save = CORO_SAVE_DEF;
1060	coro->flags = CF_NEW;	1252	coro->flags = CF_NEW;
1061		1253
		1254	if (coro_first) coro_first->prev = coro;
		1255	coro->next = coro_first;
		1256	coro_first = coro;
		1257
1062	hv = newHV ();	1258	coro->hv = hv = newHV ();
1063	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1259	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1064	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1260	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065		1261
1066	for (i = 1; i < items; i++)	1262	for (i = 1; i < items; i++)
1067	av_push (coro->args, newSVsv (ST (i)));	1263	av_push (coro->args, newSVsv (ST (i)));
1068	}	1264	}
1069	OUTPUT:	1265	OUTPUT:
		1266	RETVAL
		1267
		1268	int
		1269	save (SV *coro, int new_save = -1)
		1270	CODE:
		1271	RETVAL = api_save (coro, new_save);
		1272	OUTPUT:
		1273	RETVAL
		1274
		1275	int
		1276	save_also (SV *coro_sv, int save_also)
		1277	CODE:
		1278	{
		1279	struct coro *coro = SvSTATE (coro_sv);
		1280	RETVAL = coro->save;
		1281	coro->save |= save_also;
		1282	}
		1283	OUTPUT:
1070	RETVAL	1284	RETVAL
1071		1285
1072	void	1286	void
1073	_set_stacklevel (...)	1287	_set_stacklevel (...)
1074	ALIAS:	1288	ALIAS:
1075	Coro::State::transfer = 1	1289	Coro::State::transfer = 1
1076	Coro::schedule = 2	1290	Coro::schedule = 2
1077	Coro::cede = 3	1291	Coro::cede = 3
		1292	Coro::cede_notself = 4
1078	CODE:	1293	CODE:
1079	{	1294	{
1080	struct transfer_args ta;	1295	struct transfer_args ta;
1081		1296
1082	switch (ix)	1297	switch (ix)
1083	{	1298	{
1084	case 0:	1299	case 0:
1085	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1300	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1086	ta.next = 0;	1301	ta.next = 0;
1087	ta.flags = TRANSFER_SET_STACKLEVEL;
1088	break;	1302	break;
1089		1303
1090	case 1:	1304	case 1:
1091	if (items != 3)	1305	if (items != 2)
1092	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1306	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1093		1307
1094	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1308	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1095	break;	1309	break;
1096		1310
1097	case 2:	1311	case 2:
1098	prepare_schedule (&ta);	1312	prepare_schedule (aTHX_ &ta);
1099	break;	1313	break;
1100		1314
1101	case 3:	1315	case 3:
1102	prepare_cede (&ta);	1316	prepare_cede (aTHX_ &ta);
		1317	break;
		1318
		1319	case 4:
		1320	if (!prepare_cede_notself (aTHX_ &ta))
		1321	XSRETURN_EMPTY;
		1322
1103	break;	1323	break;
1104	}	1324	}
1105		1325
		1326	BARRIER;
1106	TRANSFER (ta);	1327	TRANSFER (ta);
1107	}
1108		1328
1109	void	1329	if (GIMME_V != G_VOID && ta.next != ta.prev)
1110	_clone_state_from (SV *dst, SV *src)	1330	XSRETURN_YES;
		1331	}
		1332
		1333	bool
		1334	_destroy (SV *coro_sv)
1111	CODE:	1335	CODE:
1112	{	1336	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1113	struct coro *coro_src = SvSTATE (src);	1337	OUTPUT:
1114		1338	RETVAL
1115	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1116
1117	++coro_src->refcnt;
1118	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1119	}
1120		1339
1121	void	1340	void
1122	_exit (code)	1341	_exit (code)
1123	int code	1342	int code
1124	PROTOTYPE: $	1343	PROTOTYPE: $
1125	CODE:	1344	CODE:
1126	_exit (code);	1345	_exit (code);
1127		1346
1128	int	1347	int
		1348	cctx_stacksize (int new_stacksize = 0)
		1349	CODE:
		1350	RETVAL = coro_stacksize;
		1351	if (new_stacksize)
		1352	coro_stacksize = new_stacksize;
		1353	OUTPUT:
		1354	RETVAL
		1355
		1356	int
1129	cctx_count ()	1357	cctx_count ()
1130	CODE:	1358	CODE:
1131	RETVAL = cctx_count;	1359	RETVAL = cctx_count;
1132	OUTPUT:	1360	OUTPUT:
1133	RETVAL	1361	RETVAL
…		…
1137	CODE:	1365	CODE:
1138	RETVAL = cctx_idle;	1366	RETVAL = cctx_idle;
1139	OUTPUT:	1367	OUTPUT:
1140	RETVAL	1368	RETVAL
1141		1369
		1370	void
		1371	list ()
		1372	PPCODE:
		1373	{
		1374	struct coro *coro;
		1375	for (coro = coro_first; coro; coro = coro->next)
		1376	if (coro->hv)
		1377	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1378	}
		1379
		1380	void
		1381	_eval (Coro::State coro, SV *coderef)
		1382	CODE:
		1383	{
		1384	if (coro->mainstack)
		1385	{
		1386	struct coro temp;
		1387	Zero (&temp, 1, struct coro);
		1388	temp.save = CORO_SAVE_ALL;
		1389
		1390	if (!(coro->flags & CF_RUNNING))
		1391	{
		1392	save_perl (aTHX_ &temp);
		1393	load_perl (aTHX_ coro);
		1394	}
		1395
		1396	{
		1397	dSP;
		1398	ENTER;
		1399	SAVETMPS;
		1400	PUSHMARK (SP);
		1401	PUTBACK;
		1402	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1403	SPAGAIN;
		1404	FREETMPS;
		1405	LEAVE;
		1406	PUTBACK;
		1407	}
		1408
		1409	if (!(coro->flags & CF_RUNNING))
		1410	{
		1411	save_perl (aTHX_ coro);
		1412	load_perl (aTHX_ &temp);
		1413	}
		1414	}
		1415	}
		1416
		1417	SV *
		1418	is_ready (Coro::State coro)
		1419	PROTOTYPE: $
		1420	ALIAS:
		1421	is_ready = CF_READY
		1422	is_running = CF_RUNNING
		1423	is_new = CF_NEW
		1424	is_destroyed = CF_DESTROYED
		1425	CODE:
		1426	RETVAL = boolSV (coro->flags & ix);
		1427	OUTPUT:
		1428	RETVAL
		1429
		1430	IV
		1431	rss (Coro::State coro)
		1432	PROTOTYPE: $
		1433	CODE:
		1434	RETVAL = coro_rss (coro);
		1435	OUTPUT:
		1436	RETVAL
		1437
		1438
1142	MODULE = Coro::State PACKAGE = Coro	1439	MODULE = Coro::State PACKAGE = Coro
1143		1440
1144	BOOT:	1441	BOOT:
1145	{	1442	{
1146	int i;	1443	int i;
…		…
1161	coro_ready[i] = newAV ();	1458	coro_ready[i] = newAV ();
1162		1459
1163	{	1460	{
1164	SV *sv = perl_get_sv("Coro::API", 1);	1461	SV *sv = perl_get_sv("Coro::API", 1);
1165		1462
1166	coroapi.schedule = api_schedule;	1463	coroapi.schedule = api_schedule;
		1464	coroapi.save = api_save;
1167	coroapi.cede = api_cede;	1465	coroapi.cede = api_cede;
		1466	coroapi.cede_notself = api_cede_notself;
1168	coroapi.ready = api_ready;	1467	coroapi.ready = api_ready;
1169	coroapi.is_ready = api_is_ready;	1468	coroapi.is_ready = api_is_ready;
1170	coroapi.nready = &coro_nready;	1469	coroapi.nready = &coro_nready;
1171	coroapi.current = coro_current;	1470	coroapi.current = coro_current;
1172		1471
1173	GCoroAPI = &coroapi;	1472	GCoroAPI = &coroapi;
1174	sv_setiv (sv, (IV)&coroapi);	1473	sv_setiv (sv, (IV)&coroapi);
1175	SvREADONLY_on (sv);	1474	SvREADONLY_on (sv);
1176	}	1475	}
1177	}	1476	}
		1477
		1478	void
		1479	_set_current (SV *current)
		1480	PROTOTYPE: $
		1481	CODE:
		1482	SvREFCNT_dec (SvRV (coro_current));
		1483	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1178		1484
1179	int	1485	int
1180	prio (Coro::State coro, int newprio = 0)	1486	prio (Coro::State coro, int newprio = 0)
1181	ALIAS:	1487	ALIAS:
1182	nice = 1	1488	nice = 1
…		…
1185	RETVAL = coro->prio;	1491	RETVAL = coro->prio;
1186		1492
1187	if (items > 1)	1493	if (items > 1)
1188	{	1494	{
1189	if (ix)	1495	if (ix)
1190	newprio += coro->prio;	1496	newprio = coro->prio - newprio;
1191		1497
1192	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1498	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1193	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1499	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1194		1500
1195	coro->prio = newprio;	1501	coro->prio = newprio;
1196	}	1502	}
1197	}	1503	}
		1504	OUTPUT:
		1505	RETVAL
1198		1506
1199	SV *	1507	SV *
1200	ready (SV *self)	1508	ready (SV *self)
1201	PROTOTYPE: $	1509	PROTOTYPE: $
1202	CODE:	1510	CODE:
1203	RETVAL = boolSV (api_ready (self));	1511	RETVAL = boolSV (api_ready (self));
1204	OUTPUT:	1512	OUTPUT:
1205	RETVAL	1513	RETVAL
1206		1514
1207	SV *
1208	is_ready (SV *self)
1209	PROTOTYPE: $
1210	CODE:
1211	RETVAL = boolSV (api_is_ready (self));
1212	OUTPUT:
1213	RETVAL
1214
1215	int	1515	int
1216	nready (...)	1516	nready (...)
1217	PROTOTYPE:	1517	PROTOTYPE:
1218	CODE:	1518	CODE:
1219	RETVAL = coro_nready;	1519	RETVAL = coro_nready;
1220	OUTPUT:	1520	OUTPUT:
1221	RETVAL	1521	RETVAL
1222		1522
1223	void
1224	_set_current (SV *current)
1225	PROTOTYPE: $
1226	CODE:
1227	SvREFCNT_dec (SvRV (coro_current));
1228	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1229
1230	MODULE = Coro::State PACKAGE = Coro::AIO	1523	MODULE = Coro::State PACKAGE = Coro::AIO
1231		1524
1232	SV *	1525	SV *
1233	_get_state ()	1526	_get_state ()
1234	CODE:	1527	CODE:
1235	{	1528	{
1236	struct {	1529	struct io_state *data;
1237	int errorno;
1238	int laststype;
1239	int laststatval;
1240	Stat_t statcache;
1241	} data;
1242		1530
		1531	RETVAL = newSV (sizeof (struct io_state));
		1532	data = (struct io_state *)SvPVX (RETVAL);
		1533	SvCUR_set (RETVAL, sizeof (struct io_state));
		1534	SvPOK_only (RETVAL);
		1535
1243	data.errorno = errno;	1536	data->errorno = errno;
1244	data.laststype = PL_laststype;	1537	data->laststype = PL_laststype;
1245	data.laststatval = PL_laststatval;	1538	data->laststatval = PL_laststatval;
1246	data.statcache = PL_statcache;	1539	data->statcache = PL_statcache;
1247
1248	RETVAL = newSVpvn ((char *)&data, sizeof data);
1249	}	1540	}
1250	OUTPUT:	1541	OUTPUT:
1251	RETVAL	1542	RETVAL
1252		1543
1253	void	1544	void
1254	_set_state (char *data_)	1545	_set_state (char *data_)
1255	PROTOTYPE: $	1546	PROTOTYPE: $
1256	CODE:	1547	CODE:
1257	{	1548	{
1258	struct {	1549	struct io_state *data = (void *)data_;
1259	int errorno;
1260	int laststype;
1261	int laststatval;
1262	Stat_t statcache;
1263	} *data = (void *)data_;
1264		1550
1265	errno = data->errorno;	1551	errno = data->errorno;
1266	PL_laststype = data->laststype;	1552	PL_laststype = data->laststype;
1267	PL_laststatval = data->laststatval;	1553	PL_laststatval = data->laststatval;
1268	PL_statcache = data->statcache;	1554	PL_statcache = data->statcache;
1269	}	1555	}
		1556

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