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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.112 by root, Thu Nov 30 20:52:52 2006 UTC vs.
Revision 1.155 by root, Fri Sep 21 01:09:36 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 */
		134	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
107		137
108	static struct coro_cctx *cctx_first;	138	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	139	static int cctx_count, cctx_idle;
…		…
112	typedef struct coro_cctx {	142	typedef struct coro_cctx {
113	struct coro_cctx *next;	143	struct coro_cctx *next;
114		144
115	/* the stack */	145	/* the stack */
116	void *sptr;	146	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
118		148
119	/* cpu state */	149	/* cpu state */
120	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 */
121	JMPENV *top_env;	152	JMPENV *top_env;
122	coro_context cctx;	153	coro_context cctx;
123		154
124	int inuse;
125
126	#if USE_VALGRIND	155	#if CORO_USE_VALGRIND
127	int valgrind_id;	156	int valgrind_id;
128	#endif	157	#endif
		158	char inuse, mapped;
129	} coro_cctx;	159	} coro_cctx;
130		160
131	enum {	161	enum {
132	CF_RUNNING, /* coroutine is running */	162	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	166	};
135		167
136	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
137	struct coro {	169	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	171	coro_cctx *cctx;
140		172
141	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
142	AV *args;	174	AV *args;
143	int refcnt;	175	int refcnt;
144	int flags;	176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
145		178
146	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
147	AV *defav;	180	AV *defav; /* @_ */
148	SV *defsv;	181	SV *defsv; /* $_ */
149	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
150		186
151	#define VAR(name,type) type name;	187	#define VAR(name,type) type name;
152	# include "state.h"	188	# include "state.h"
153	#undef VAR	189	#undef VAR
154		190
155	/* coro process data */	191	/* coro process data */
156	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 */
157	};	197	};
158		198
159	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
161		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
162	static AV *	219	static AV *
163	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
164	{	221	{
165	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
167		224
168	newpadlist = newAV ();	225	newpadlist = newAV ();
…		…
180		237
181	return newpadlist;	238	return newpadlist;
182	}	239	}
183		240
184	static void	241	static void
185	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
186	{	243	{
187	/* may be during global destruction */	244	/* may be during global destruction */
188	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
189	{	246	{
190	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	268	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
213		270
214	/* casting is fun. */	271	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
217		274
218	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
219		276
220	return 0;	277	return 0;
221	}	278	}
…		…
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	289	: 0
233		290
234	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
235	static void	292	static void
236	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
237	{	294	{
238	MAGIC *mg = CORO_MAGIC (cv);	295	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	296	AV *av;
240		297
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	300	else
244	{	301	{
245	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
251	#else	308	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	310	#endif
254	}	311	}
255	}	312	}
256		313
257	static void	314	static void
258	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
259	{	316	{
260	MAGIC *mg = CORO_MAGIC (cv);	317	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	318	AV *av;
262		319
263	if (!mg)	320	if (!mg)
…		…
274	av_extend (av, AvMAX (av) + 1);	331	av_extend (av, AvMAX (av) + 1);
275		332
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	334	}
278		335
		336	/** load & save, init *******************************************************/
		337
279	#define SB do {	338	#define SB do {
280	#define SE } while (0)	339	#define SE } while (0)
281		340
282	#define LOAD(state) load_state((state));
283	#define SAVE(state,flags) save_state((state),(flags));
284
285	#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
286		342
287	static void	343	static void
288	load_state(Coro__State c)	344	load_perl (pTHX_ Coro__State c)
289	{	345	{
290	#define VAR(name,type) PL_ ## name = c->name;	346	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	347	# include "state.h"
292	#undef VAR	348	#undef VAR
293		349
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296	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	}
297		369
298	{	370	{
299	dSP;	371	dSP;
300	CV *cv;	372	CV *cv;
301		373
302	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
304	{	376	{
305	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	378	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	379	CvPADLIST (cv) = (AV *)POPs;
308	}	380	}
309		381
310	PUTBACK;	382	PUTBACK;
311	}	383	}
312	}	384	}
313		385
314	static void	386	static void
315	save_state(Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
316	{	388	{
317	{	389	{
318	dSP;	390	dSP;
319	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	395	/*
324	* 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
325	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
326	*/	398	*/
327		399
		400	EXTEND (SP, 3 + 1);
328	PUSHs (Nullsv);	401	PUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
330	for (;;)	403	for (;;)
331	{	404	{
332	while (cxix >= 0)	405	while (cxix >= 0)
333	{	406	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
335		408
336	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
337	{	410	{
338	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
339		412
340	if (CvDEPTH (cv))	413	if (CvDEPTH (cv))
341	{	414	{
342	EXTEND (SP, 3);	415	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
347		419
348	CvDEPTH (cv) = 0;	420	CvDEPTH (cv) = 0;
349	get_padlist (cv);	421	get_padlist (aTHX_ cv);
350	}	422	}
351	}	423	}
352	#ifdef CXt_FORMAT
353	else if (CxTYPE(cx) == CXt_FORMAT)
354	{
355	/* I never used formats, so how should I know how these are implemented? */
356	/* my bold guess is as a simple, plain sub... */
357	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358	}
359	#endif
360	}	424	}
361		425
362	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
363	break;	427	break;
364		428
…		…
368	}	432	}
369		433
370	PUTBACK;	434	PUTBACK;
371	}	435	}
372		436
373	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;
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
375	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;
376		442
377	#define VAR(name,type)c->name = PL_ ## name;	443	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	444	# include "state.h"
379	#undef VAR	445	#undef VAR
380	}	446	}
…		…
383	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
387	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
388	static void	457	static void
389	coro_init_stacks ()	458	coro_init_stacks (pTHX)
390	{	459	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(64, 4);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		464
396	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		468
400	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,64,SV*);
401	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	472	PL_tmps_max = 64;
404		473
405	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 16;
408		477
…		…
412		481
413	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,16,I32);
414	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	484	PL_scopestack_max = 16;
416		485
417	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	488	PL_savestack_max = 64;
420		489
421	#if !PERL_VERSION_ATLEAST (5,9,0)	490	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,8,OP*);
423	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	493	PL_retstack_max = 8;
425	#endif	494	#endif
426	}	495	}
		496	#endif
427		497
428	/*	498	/*
429	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
430	*/	500	*/
431	static void	501	static void
432	coro_destroy_stacks ()	502	coro_destroy_stacks (pTHX)
433	{	503	{
434	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
435	{	505	{
436	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
437	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
438		509
439	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
440	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
441		513
		514	/* unwind all extra stacks */
442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
443	}	519	}
444		520
445	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
447		523
448	while (PL_curstackinfo)	524	while (PL_curstackinfo)
449	{	525	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
451		527
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		530
464	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	533	PL_curstackinfo = p;
467	}	534	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	540	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	541	Safefree (PL_retstack);
475	#endif	542	#endif
476	}	543	}
477		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
478	static void	578	static void
479	setup_coro (struct coro *coro)	579	setup_coro (pTHX_ struct coro *coro)
480	{	580	{
481	/*	581	/*
482	* emulate part of the perl startup here.	582	* emulate part of the perl startup here.
483	*/	583	*/
484
485	coro_init_stacks ();	584	coro_init_stacks (aTHX);
486		585
		586	PL_curcop = &PL_compiling;
		587	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	588	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	589	PL_curpm = 0;
		590	PL_localizing = 0;
		591	PL_dirty = 0;
		592	PL_restartop = 0;
490		593
491	{	594	{
492	dSP;	595	dSP;
493	LOGOP myop;	596	LOGOP myop;
494		597
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));	598	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;	599	GvAV (PL_defgv) = coro->args; coro->args = 0;
500		600
501	Zero (&myop, 1, LOGOP);	601	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	602	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID;
504		604
		605	PUSHMARK (SP);
		606	XPUSHs (av_shift (GvAV (PL_defgv)));
		607	PUTBACK;
505	PL_op = (OP *)&myop;	608	PL_op = (OP *)&myop;
506
507	PUSHMARK (SP);
508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509	PUTBACK;
510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	609	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	610	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	611	}
515	}
516		612
		613	ENTER; /* necessary e.g. for dounwind */
		614	}
		615
517	static void	616	static void
518	free_coro_mortal ()	617	free_coro_mortal (pTHX)
519	{	618	{
520	if (coro_mortal)	619	if (coro_mortal)
521	{	620	{
522	SvREFCNT_dec (coro_mortal);	621	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	622	coro_mortal = 0;
524	}	623	}
525	}	624	}
526		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 */
527	static void NOINLINE	629	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	630	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	631	{
530	dSP;	632	dSP;
531	LOGOP myop;	633	LOGOP myop;
532		634
533	Zero (&myop, 1, LOGOP);	635	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	636	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	637	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		638
539	PUSHMARK (SP);	639	PUSHMARK (SP);
		640	EXTEND (SP, 2);
		641	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	642	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	643	PUTBACK;
		644	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	646	SPAGAIN;
544	}	647	}
545		648
		649	/*
		650	* this is a _very_ stripped down perl interpreter ;)
		651	*/
546	static void	652	static void
547	coro_run (void *arg)	653	coro_run (void *arg)
548	{	654	{
		655	dTHX;
		656
549	/* coro_run is the alternative epilogue of transfer() */	657	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	658	UNLOCK;
551		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
552	/*	669	/*
553	* 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
554	*/	675	*/
555	PL_top_env = &PL_start_env;	676	PL_top_env = main_top_env;
556		677	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
557	/* inject call to cctx_init */
558	prepare_cctx ((coro_cctx *)arg);
559
560	/* somebody will hit me for both perl_run and PL_restartop */
561	perl_run (PL_curinterp);
562
563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564	abort ();
565	}	678	}
566		679
567	static coro_cctx *	680	static coro_cctx *
568	cctx_new ()	681	cctx_new ()
569	{	682	{
570	coro_cctx *cctx;	683	coro_cctx *cctx;
		684	void *stack_start;
		685	size_t stack_size;
571		686
572	++cctx_count;	687	++cctx_count;
573		688
574	New (0, cctx, 1, coro_cctx);	689	Newz (0, cctx, 1, coro_cctx);
575		690
576	#if HAVE_MMAP	691	#if HAVE_MMAP
577		692
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	693	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	694	/* mmap supposedly does allocate-on-write for us */
580	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);
581		696
582	if (cctx->sptr == (void *)-1)	697	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	698	{
587
588	# if STACKGUARD	699	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	700	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# 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);
591		711
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	712	if (!cctx->sptr)
598	{	713	{
599	perror ("FATAL: unable to malloc stack for coroutine");	714	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	715	_exit (EXIT_FAILURE);
601	}	716	}
602		717
603	#endif	718	stack_start = cctx->sptr;
		719	stack_size = cctx->ssize;
		720	}
604		721
605	#if USE_VALGRIND	722	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608	cctx->ssize + (char *)cctx->sptr
609	);
610	#endif
611
612	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);
613		724
614	return cctx;	725	return cctx;
615	}	726	}
616		727
617	static void	728	static void
618	cctx_free (coro_cctx *cctx)	729	cctx_destroy (coro_cctx *cctx)
619	{	730	{
620	if (!cctx)	731	if (!cctx)
621	return;	732	return;
622		733
623	--cctx_count;	734	--cctx_count;
624		735
625	#if USE_VALGRIND	736	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	737	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	738	#endif
628		739
629	#if HAVE_MMAP	740	#if HAVE_MMAP
		741	if (cctx->mapped)
630	munmap (cctx->sptr, cctx->ssize);	742	munmap (cctx->sptr, cctx->ssize);
631	#else	743	else
		744	#endif
632	Safefree (cctx->sptr);	745	Safefree (cctx->sptr);
633	#endif
634		746
635	Safefree (cctx);	747	Safefree (cctx);
636	}	748	}
637		749
638	static coro_cctx *	750	static coro_cctx *
639	cctx_get ()	751	cctx_get (pTHX)
640	{	752	{
641	coro_cctx *cctx;
642
643	if (cctx_first)	753	while (cctx_first)
644	{	754	{
		755	coro_cctx *cctx = cctx_first;
		756	cctx_first = cctx->next;
645	--cctx_idle;	757	--cctx_idle;
646	cctx = cctx_first;	758
647	cctx_first = cctx->next;	759	if (cctx->ssize >= coro_stacksize)
		760	return cctx;
		761
		762	cctx_destroy (cctx);
648	}	763	}
649	else	764
650	{
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;	765	PL_op = PL_op->op_next;
653	}
654
655	return cctx;	766	return cctx_new ();
656	}	767	}
657		768
658	static void	769	static void
659	cctx_put (coro_cctx *cctx)	770	cctx_put (coro_cctx *cctx)
660	{	771	{
		772	/* free another cctx if overlimit */
		773	if (cctx_idle >= MAX_IDLE_CCTX)
		774	{
		775	coro_cctx *first = cctx_first;
		776	cctx_first = first->next;
		777	--cctx_idle;
		778
		779	assert (!first->inuse);
		780	cctx_destroy (first);
		781	}
		782
661	++cctx_idle;	783	++cctx_idle;
662	cctx->next = cctx_first;	784	cctx->next = cctx_first;
663	cctx_first = cctx;	785	cctx_first = cctx;
664	}	786	}
665		787
		788	/** coroutine switching *****************************************************/
		789
666	/* never call directly, always through the coro_state_transfer global variable */	790	/* never call directly, always through the coro_state_transfer global variable */
667	static void NOINLINE	791	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	792	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	793	{
670	dSTACKLEVEL;	794	dSTACKLEVEL;
671		795
672	/* sometimes transfer is only called to set idle_sp */	796	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	797	if (!next)
		798	{
674	((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	}
675	else if (prev != next)	802	else if (prev != next)
676	{	803	{
677	coro_cctx *prev__cctx;	804	coro_cctx *prev__cctx;
678		805
679	if (!prev->cctx)	806	if (prev->flags & CF_NEW)
680	{	807	{
681	/* create a new empty context */	808	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	809	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	810	prev->cctx->inuse = 1;
		811	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	812	prev->flags |= CF_RUNNING;
685	}	813	}
686		814
		815	/*TODO: must not croak here */
687	if (!prev->flags & CF_RUNNING)	816	if (!prev->flags & CF_RUNNING)
688	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");
689		818
690	if (next->flags & CF_RUNNING)	819	if (next->flags & CF_RUNNING)
691	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");
692		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
693	prev->flags &= ~CF_RUNNING;	825	prev->flags &= ~CF_RUNNING;
694	next->flags |= CF_RUNNING;	826	next->flags |= CF_RUNNING;
695		827
696	LOCK;	828	LOCK;
697		829
698	if (next->mainstack)	830	if (next->flags & CF_NEW)
699	{	831	{
700	/* coroutine already started */	832	/* need to start coroutine */
701	SAVE (prev, flags);	833	next->flags &= ~CF_NEW;
702	LOAD (next);	834	/* first get rid of the old state */
		835	save_perl (aTHX_ prev);
		836	/* setup coroutine call */
		837	setup_coro (aTHX_ next);
		838	/* need a new stack */
		839	assert (!next->cctx);
703	}	840	}
704	else	841	else
705	{	842	{
706	/* need to start coroutine */	843	/* coroutine already started */
707	/* first get rid of the old state */	844	save_perl (aTHX_ prev);
708	SAVE (prev, -1);	845	load_perl (aTHX_ next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	846	}
714		847
715	prev__cctx = prev->cctx;	848	prev__cctx = prev->cctx;
716		849
717	/* possibly "free" the cctx */	850	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	851	if (prev__cctx->idle_sp == STACKLEVEL)
719	{	852	{
720	assert (PL_top_env == prev__cctx->top_env);	853	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		854	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		855
		856	prev->cctx = 0;
721		857
722	cctx_put (prev__cctx);	858	cctx_put (prev__cctx);
723	prev->cctx = 0;	859	prev__cctx->inuse = 0;
724	}	860	}
725		861
726	if (!next->cctx)	862	if (!next->cctx)
		863	{
727	next->cctx = cctx_get ();	864	next->cctx = cctx_get (aTHX);
		865	assert (!next->cctx->inuse);
		866	next->cctx->inuse = 1;
		867	}
728		868
729	if (prev__cctx != next->cctx)	869	if (prev__cctx != next->cctx)
730	{	870	{
731	assert ( prev__cctx->inuse);
732	assert (!next->cctx->inuse);
733
734	prev__cctx->inuse = 0;
735	next->cctx->inuse = 1;
736
737	prev__cctx->top_env = PL_top_env;	871	prev__cctx->top_env = PL_top_env;
738	PL_top_env = next->cctx->top_env;	872	PL_top_env = next->cctx->top_env;
739	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	873	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
740	}	874	}
741		875
742	free_coro_mortal ();	876	free_coro_mortal (aTHX);
743
744	UNLOCK;	877	UNLOCK;
745	}	878	}
746	}	879	}
747		880
748	struct transfer_args	881	struct transfer_args
749	{	882	{
750	struct coro *prev, *next;	883	struct coro *prev, *next;
751	int flags;
752	};	884	};
753		885
754	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	886	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
755		887
		888	/** high level stuff ********************************************************/
		889
756	static void	890	static int
757	coro_state_destroy (struct coro *coro)	891	coro_state_destroy (pTHX_ struct coro *coro)
758	{	892	{
759	if (coro->refcnt--)	893	if (coro->flags & CF_DESTROYED)
760	return;	894	return 0;
761		895
		896	coro->flags |= CF_DESTROYED;
		897
762	if (coro->flags & CF_RUNNING)	898	if (coro->flags & CF_READY)
763	croak ("FATAL: tried to destroy currently running coroutine");	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 */
764		908
765	if (coro->mainstack && coro->mainstack != main_mainstack)	909	if (coro->mainstack && coro->mainstack != main_mainstack)
766	{	910	{
767	struct coro temp;	911	struct coro temp;
768		912
769	SAVE ((&temp), TRANSFER_SAVE_ALL);	913	assert (!(coro->flags & CF_RUNNING));
770	LOAD (coro);
771		914
		915	Zero (&temp, 1, struct coro);
		916	temp.save = CORO_SAVE_ALL;
		917
		918	if (coro->flags & CF_RUNNING)
		919	croak ("FATAL: tried to destroy currently running coroutine");
		920
		921	save_perl (aTHX_ &temp);
		922	load_perl (aTHX_ coro);
		923
772	coro_destroy_stacks ();	924	coro_destroy_stacks (aTHX);
773		925
774	LOAD ((&temp)); /* this will get rid of defsv etc.. */	926	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
775		927
776	coro->mainstack = 0;	928	coro->mainstack = 0;
777	}	929	}
778		930
779	cctx_free (coro->cctx);	931	cctx_destroy (coro->cctx);
780	SvREFCNT_dec (coro->args);	932	SvREFCNT_dec (coro->args);
781	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;
782	}	939	}
783		940
784	static int	941	static int
785	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	942	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
786	{	943	{
787	struct coro *coro = (struct coro *)mg->mg_ptr;	944	struct coro *coro = (struct coro *)mg->mg_ptr;
788	mg->mg_ptr = 0;	945	mg->mg_ptr = 0;
789		946
		947	coro->hv = 0;
		948
		949	if (--coro->refcnt < 0)
		950	{
790	coro_state_destroy (coro);	951	coro_state_destroy (aTHX_ coro);
		952	Safefree (coro);
		953	}
791		954
792	return 0;	955	return 0;
793	}	956	}
794		957
795	static int	958	static int
…		…
802	return 0;	965	return 0;
803	}	966	}
804		967
805	static MGVTBL coro_state_vtbl = {	968	static MGVTBL coro_state_vtbl = {
806	0, 0, 0, 0,	969	0, 0, 0, 0,
807	coro_state_clear,	970	coro_state_free,
808	0,	971	0,
809	#ifdef MGf_DUP	972	#ifdef MGf_DUP
810	coro_state_dup,	973	coro_state_dup,
811	#else	974	#else
812	# define MGf_DUP 0	975	# define MGf_DUP 0
813	#endif	976	#endif
814	};	977	};
815		978
816	static struct coro *	979	static struct coro *
817	SvSTATE (SV *coro)	980	SvSTATE_ (pTHX_ SV *coro)
818	{	981	{
819	HV *stash;	982	HV *stash;
820	MAGIC *mg;	983	MAGIC *mg;
821		984
822	if (SvROK (coro))	985	if (SvROK (coro))
…		…
828	/* very slow, but rare, check */	991	/* very slow, but rare, check */
829	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	992	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
830	croak ("Coro::State object required");	993	croak ("Coro::State object required");
831	}	994	}
832		995
833	mg = SvMAGIC (coro);	996	mg = CORO_MAGIC (coro);
834	assert (mg->mg_type == PERL_MAGIC_ext);
835	return (struct coro *)mg->mg_ptr;	997	return (struct coro *)mg->mg_ptr;
836	}	998	}
837		999
		1000	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1001
838	static void	1002	static void
839	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)
840	{	1004	{
841	ta->prev = SvSTATE (prev);	1005	ta->prev = SvSTATE (prev_sv);
842	ta->next = SvSTATE (next);	1006	ta->next = SvSTATE (next_sv);
843	ta->flags = flags;
844	}	1007	}
845		1008
846	static void	1009	static void
847	api_transfer (SV *prev, SV *next, int flags)	1010	api_transfer (SV *prev_sv, SV *next_sv)
848	{	1011	{
849	dTHX;	1012	dTHX;
850	struct transfer_args ta;	1013	struct transfer_args ta;
851		1014
852	prepare_transfer (&ta, prev, next, flags);	1015	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
853	TRANSFER (ta);	1016	TRANSFER (ta);
854	}	1017	}
855		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
856	/** Coro ********************************************************************/	1032	/** Coro ********************************************************************/
857		1033
858	#define PRIO_MAX 3
859	#define PRIO_HIGH 1
860	#define PRIO_NORMAL 0
861	#define PRIO_LOW -1
862	#define PRIO_IDLE -3
863	#define PRIO_MIN -4
864
865	/* for Coro.pm */
866	static GV *coro_current, *coro_idle;
867	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
868	static int coro_nready;
869
870	static void	1034	static void
871	coro_enq (SV *coro_sv)	1035	coro_enq (pTHX_ SV *coro_sv)
872	{	1036	{
873	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);
874	coro_nready++;
875	}	1038	}
876		1039
877	static SV *	1040	static SV *
878	coro_deq (int min_prio)	1041	coro_deq (pTHX_ int min_prio)
879	{	1042	{
880	int prio = PRIO_MAX - PRIO_MIN;	1043	int prio = PRIO_MAX - PRIO_MIN;
881		1044
882	min_prio -= PRIO_MIN;	1045	min_prio -= PRIO_MIN;
883	if (min_prio < 0)	1046	if (min_prio < 0)
884	min_prio = 0;	1047	min_prio = 0;
885		1048
886	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1049	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
887	if (AvFILLp (coro_ready [prio]) >= 0)	1050	if (AvFILLp (coro_ready [prio]) >= 0)
888	{
889	coro_nready--;
890	return av_shift (coro_ready [prio]);	1051	return av_shift (coro_ready [prio]);
891	}
892		1052
893	return 0;	1053	return 0;
894	}	1054	}
895		1055
896	static int	1056	static int
897	api_ready (SV *coro_sv)	1057	api_ready (SV *coro_sv)
898	{	1058	{
		1059	dTHX;
899	struct coro *coro;	1060	struct coro *coro;
900		1061
901	if (SvROK (coro_sv))	1062	if (SvROK (coro_sv))
902	coro_sv = SvRV (coro_sv);	1063	coro_sv = SvRV (coro_sv);
903		1064
904	coro = SvSTATE (coro_sv);	1065	coro = SvSTATE (coro_sv);
905		1066
906	if (coro->flags & CF_READY)	1067	if (coro->flags & CF_READY)
907	return 0;	1068	return 0;
908		1069
909	if (coro->flags & CF_RUNNING)
910	croak ("Coro::ready called on currently running coroutine");
911
912	coro->flags |= CF_READY;	1070	coro->flags |= CF_READY;
913		1071
914	LOCK;	1072	LOCK;
915	coro_enq (SvREFCNT_inc (coro_sv));	1073	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1074	++coro_nready;
916	UNLOCK;	1075	UNLOCK;
917		1076
918	return 1;	1077	return 1;
919	}	1078	}
920		1079
921	static int	1080	static int
922	api_is_ready (SV *coro_sv)	1081	api_is_ready (SV *coro_sv)
923	{	1082	{
		1083	dTHX;
924	return !!SvSTATE (coro_sv)->flags & CF_READY;	1084	return !!(SvSTATE (coro_sv)->flags & CF_READY);
925	}	1085	}
926		1086
927	static void	1087	static void
928	prepare_schedule (struct transfer_args *ta)	1088	prepare_schedule (pTHX_ struct transfer_args *ta)
929	{	1089	{
930	SV *current, *prev, *next;	1090	SV *prev_sv, *next_sv;
931
932	current = GvSV (coro_current);
933		1091
934	for (;;)	1092	for (;;)
935	{	1093	{
936	LOCK;	1094	LOCK;
937	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;
938	UNLOCK;	1127	UNLOCK;
939
940	if (next)
941	break;	1128	break;
942
943	{
944	dSP;
945
946	ENTER;
947	SAVETMPS;
948
949	PUSHMARK (SP);
950	PUTBACK;
951	call_sv (GvSV (coro_idle), G_DISCARD);
952
953	FREETMPS;
954	LEAVE;
955	}	1129	}
956	}
957
958	prev = SvRV (current);
959	SvRV (current) = next;
960		1130
961	/* 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
962	LOCK;	1139	LOCK;
963	free_coro_mortal ();	1140	free_coro_mortal (aTHX);
		1141	coro_mortal = prev_sv;
964	UNLOCK;	1142	UNLOCK;
965	coro_mortal = prev;
966
967	ta->prev = SvSTATE (prev);
968	ta->next = SvSTATE (next);
969	ta->flags = TRANSFER_SAVE_ALL;
970
971	ta->next->flags &= ~CF_READY;
972	}	1143	}
973		1144
974	static void	1145	static void
975	prepare_cede (struct transfer_args *ta)	1146	prepare_cede (pTHX_ struct transfer_args *ta)
976	{	1147	{
977	api_ready (GvSV (coro_current));	1148	api_ready (coro_current);
978
979	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;
980	}	1164	}
981		1165
982	static void	1166	static void
983	api_schedule (void)	1167	api_schedule (void)
984	{	1168	{
985	dTHX;	1169	dTHX;
986	struct transfer_args ta;	1170	struct transfer_args ta;
987		1171
988	prepare_schedule (&ta);	1172	prepare_schedule (aTHX_ &ta);
989	TRANSFER (ta);	1173	TRANSFER (ta);
990	}	1174	}
991		1175
992	static void	1176	static int
993	api_cede (void)	1177	api_cede (void)
994	{	1178	{
995	dTHX;	1179	dTHX;
996	struct transfer_args ta;	1180	struct transfer_args ta;
997		1181
998	prepare_cede (&ta);	1182	prepare_cede (aTHX_ &ta);
		1183
		1184	if (ta.prev != ta.next)
		1185	{
999	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;
1000	}	1206	}
1001		1207
1002	MODULE = Coro::State PACKAGE = Coro::State	1208	MODULE = Coro::State PACKAGE = Coro::State
1003		1209
1004	PROTOTYPES: DISABLE	1210	PROTOTYPES: DISABLE
…		…
1010	#endif	1216	#endif
1011	BOOT_PAGESIZE;	1217	BOOT_PAGESIZE;
1012		1218
1013	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1219	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1014		1220
1015	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1016	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1017	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));
1018		1228
1019	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;
1020		1234
1021	coroapi.ver = CORO_API_VERSION;	1235	coroapi.ver = CORO_API_VERSION;
1022	coroapi.transfer = api_transfer;	1236	coroapi.transfer = api_transfer;
1023		1237
1024	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1238	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1032	HV *hv;	1246	HV *hv;
1033	int i;	1247	int i;
1034		1248
1035	Newz (0, coro, 1, struct coro);	1249	Newz (0, coro, 1, struct coro);
1036	coro->args = newAV ();	1250	coro->args = newAV ();
		1251	coro->save = CORO_SAVE_DEF;
		1252	coro->flags = CF_NEW;
1037		1253
		1254	if (coro_first) coro_first->prev = coro;
		1255	coro->next = coro_first;
		1256	coro_first = coro;
		1257
1038	hv = newHV ();	1258	coro->hv = hv = newHV ();
1039	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;
1040	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1260	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1041		1261
1042	for (i = 1; i < items; i++)	1262	for (i = 1; i < items; i++)
1043	av_push (coro->args, newSVsv (ST (i)));	1263	av_push (coro->args, newSVsv (ST (i)));
1044	}	1264	}
1045	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:
1046	RETVAL	1284	RETVAL
1047		1285
1048	void	1286	void
1049	_set_stacklevel (...)	1287	_set_stacklevel (...)
1050	ALIAS:	1288	ALIAS:
1051	Coro::State::transfer = 1	1289	Coro::State::transfer = 1
1052	Coro::schedule = 2	1290	Coro::schedule = 2
1053	Coro::cede = 3	1291	Coro::cede = 3
1054	Coro::Cont::yield = 4	1292	Coro::cede_notself = 4
1055	CODE:	1293	CODE:
1056	{	1294	{
1057	struct transfer_args ta;	1295	struct transfer_args ta;
1058		1296
1059	switch (ix)	1297	switch (ix)
1060	{	1298	{
1061	case 0:	1299	case 0:
1062	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1300	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1063	ta.next = 0;	1301	ta.next = 0;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;
1065	break;	1302	break;
1066		1303
1067	case 1:	1304	case 1:
1068	if (items != 3)	1305	if (items != 2)
1069	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);
1070		1307
1071	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1308	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1072	break;	1309	break;
1073		1310
1074	case 2:	1311	case 2:
1075	prepare_schedule (&ta);	1312	prepare_schedule (aTHX_ &ta);
1076	break;	1313	break;
1077		1314
1078	case 3:	1315	case 3:
1079	prepare_cede (&ta);	1316	prepare_cede (aTHX_ &ta);
1080	break;	1317	break;
1081		1318
1082	case 4:	1319	case 4:
1083	{	1320	if (!prepare_cede_notself (aTHX_ &ta))
1084	SV *yieldstack;	1321	XSRETURN_EMPTY;
1085	SV *sv;
1086	AV *defav = GvAV (PL_defgv);
1087		1322
1088	yieldstack = *hv_fetch (
1089	(HV *)SvRV (GvSV (coro_current)),
1090	"yieldstack", sizeof ("yieldstack") - 1,
1091	0
1092	);
1093
1094	/* set up @_ -- ugly */
1095	av_clear (defav);
1096	av_fill (defav, items - 1);
1097	while (items--)
1098	av_store (defav, items, SvREFCNT_inc (ST(items)));
1099
1100	sv = av_pop ((AV *)SvRV (yieldstack));
1101	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1102	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1103	ta.flags = 0;
1104	SvREFCNT_dec (sv);
1105	}
1106	break;	1323	break;
1107
1108	}	1324	}
1109		1325
		1326	BARRIER;
1110	TRANSFER (ta);	1327	TRANSFER (ta);
1111	}
1112		1328
1113	void	1329	if (GIMME_V != G_VOID && ta.next != ta.prev)
1114	_clone_state_from (SV *dst, SV *src)	1330	XSRETURN_YES;
		1331	}
		1332
		1333	bool
		1334	_destroy (SV *coro_sv)
1115	CODE:	1335	CODE:
1116	{	1336	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1117	struct coro *coro_src = SvSTATE (src);	1337	OUTPUT:
1118		1338	RETVAL
1119	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1120
1121	++coro_src->refcnt;
1122	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1123	}
1124		1339
1125	void	1340	void
1126	_exit (code)	1341	_exit (code)
1127	int code	1342	int code
1128	PROTOTYPE: $	1343	PROTOTYPE: $
1129	CODE:	1344	CODE:
1130	_exit (code);	1345	_exit (code);
1131		1346
1132	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
1133	cctx_count ()	1357	cctx_count ()
1134	CODE:	1358	CODE:
1135	RETVAL = cctx_count;	1359	RETVAL = cctx_count;
1136	OUTPUT:	1360	OUTPUT:
1137	RETVAL	1361	RETVAL
…		…
1141	CODE:	1365	CODE:
1142	RETVAL = cctx_idle;	1366	RETVAL = cctx_idle;
1143	OUTPUT:	1367	OUTPUT:
1144	RETVAL	1368	RETVAL
1145		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
1146	MODULE = Coro::State PACKAGE = Coro	1439	MODULE = Coro::State PACKAGE = Coro
1147		1440
1148	BOOT:	1441	BOOT:
1149	{	1442	{
1150	int i;	1443	int i;
…		…
1156	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1449	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1157	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1450	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1158	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1451	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1159	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1452	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1160		1453
1161	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1454	coro_current = get_sv ("Coro::current", FALSE);
1162	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1455	SvREADONLY_on (coro_current);
1163		1456
1164	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1457	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1165	coro_ready[i] = newAV ();	1458	coro_ready[i] = newAV ();
1166		1459
1167	{	1460	{
1168	SV *sv = perl_get_sv("Coro::API", 1);	1461	SV *sv = perl_get_sv("Coro::API", 1);
1169		1462
1170	coroapi.schedule = api_schedule;	1463	coroapi.schedule = api_schedule;
		1464	coroapi.save = api_save;
1171	coroapi.cede = api_cede;	1465	coroapi.cede = api_cede;
		1466	coroapi.cede_notself = api_cede_notself;
1172	coroapi.ready = api_ready;	1467	coroapi.ready = api_ready;
1173	coroapi.is_ready = api_is_ready;	1468	coroapi.is_ready = api_is_ready;
1174	coroapi.nready = &coro_nready;	1469	coroapi.nready = &coro_nready;
1175	coroapi.current = coro_current;	1470	coroapi.current = coro_current;
1176		1471
1177	GCoroAPI = &coroapi;	1472	GCoroAPI = &coroapi;
1178	sv_setiv (sv, (IV)&coroapi);	1473	sv_setiv (sv, (IV)&coroapi);
1179	SvREADONLY_on (sv);	1474	SvREADONLY_on (sv);
1180	}	1475	}
1181	}	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)));
1182		1484
1183	int	1485	int
1184	prio (Coro::State coro, int newprio = 0)	1486	prio (Coro::State coro, int newprio = 0)
1185	ALIAS:	1487	ALIAS:
1186	nice = 1	1488	nice = 1
…		…
1189	RETVAL = coro->prio;	1491	RETVAL = coro->prio;
1190		1492
1191	if (items > 1)	1493	if (items > 1)
1192	{	1494	{
1193	if (ix)	1495	if (ix)
1194	newprio += coro->prio;	1496	newprio = coro->prio - newprio;
1195		1497
1196	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1498	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1197	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1499	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1198		1500
1199	coro->prio = newprio;	1501	coro->prio = newprio;
1200	}	1502	}
1201	}	1503	}
		1504	OUTPUT:
		1505	RETVAL
1202		1506
1203	SV *	1507	SV *
1204	ready (SV *self)	1508	ready (SV *self)
1205	PROTOTYPE: $	1509	PROTOTYPE: $
1206	CODE:	1510	CODE:
1207	RETVAL = boolSV (api_ready (self));	1511	RETVAL = boolSV (api_ready (self));
1208	OUTPUT:	1512	OUTPUT:
1209	RETVAL	1513	RETVAL
1210		1514
1211	SV *
1212	is_ready (SV *self)
1213	PROTOTYPE: $
1214	CODE:
1215	RETVAL = boolSV (api_is_ready (self));
1216	OUTPUT:
1217	RETVAL
1218
1219	int	1515	int
1220	nready (...)	1516	nready (...)
1221	PROTOTYPE:	1517	PROTOTYPE:
1222	CODE:	1518	CODE:
1223	RETVAL = coro_nready;	1519	RETVAL = coro_nready;
…		…
1228		1524
1229	SV *	1525	SV *
1230	_get_state ()	1526	_get_state ()
1231	CODE:	1527	CODE:
1232	{	1528	{
1233	struct {	1529	struct io_state *data;
1234	int errorno;
1235	int laststype;
1236	int laststatval;
1237	Stat_t statcache;
1238	} data;
1239		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
1240	data.errorno = errno;	1536	data->errorno = errno;
1241	data.laststype = PL_laststype;	1537	data->laststype = PL_laststype;
1242	data.laststatval = PL_laststatval;	1538	data->laststatval = PL_laststatval;
1243	data.statcache = PL_statcache;	1539	data->statcache = PL_statcache;
1244
1245	RETVAL = newSVpvn ((char *)&data, sizeof data);
1246	}	1540	}
1247	OUTPUT:	1541	OUTPUT:
1248	RETVAL	1542	RETVAL
1249		1543
1250	void	1544	void
1251	_set_state (char *data_)	1545	_set_state (char *data_)
1252	PROTOTYPE: $	1546	PROTOTYPE: $
1253	CODE:	1547	CODE:
1254	{	1548	{
1255	struct {	1549	struct io_state *data = (void *)data_;
1256	int errorno;
1257	int laststype;
1258	int laststatval;
1259	Stat_t statcache;
1260	} *data = (void *)data_;
1261		1550
1262	errno = data->errorno;	1551	errno = data->errorno;
1263	PL_laststype = data->laststype;	1552	PL_laststype = data->laststype;
1264	PL_laststatval = data->laststatval;	1553	PL_laststatval = data->laststatval;
1265	PL_statcache = data->statcache;	1554	PL_statcache = data->statcache;
1266	}	1555	}
		1556

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