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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.111 by root, Thu Nov 30 18:21:14 2006 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 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
328	PUSHs (Nullsv);	400	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	401	/* this loop was inspired by pp_caller */
330	for (;;)	402	for (;;)
331	{	403	{
332	while (cxix >= 0)	404	while (cxix >= 0)
333	{	405	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	406	PERL_CONTEXT *cx = &ccstk[cxix--];
335		407
336	if (CxTYPE(cx) == CXt_SUB)	408	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
337	{	409	{
338	CV *cv = cx->blk_sub.cv;	410	CV *cv = cx->blk_sub.cv;
339		411
340	if (CvDEPTH (cv))	412	if (CvDEPTH (cv))
341	{	413	{
342	EXTEND (SP, 3);	414	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	415	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	416	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	417	PUSHs ((SV *)cv);
347		418
348	CvDEPTH (cv) = 0;	419	CvDEPTH (cv) = 0;
349	get_padlist (cv);	420	get_padlist (aTHX_ cv);
350	}	421	}
351	}	422	}
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	}	423	}
361		424
362	if (top_si->si_type == PERLSI_MAIN)	425	if (top_si->si_type == PERLSI_MAIN)
363	break;	426	break;
364		427
…		…
368	}	431	}
369		432
370	PUTBACK;	433	PUTBACK;
371	}	434	}
372		435
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	436	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;	437	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	438	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		439	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		440	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
376		441
377	#define VAR(name,type)c->name = PL_ ## name;	442	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	443	# include "state.h"
379	#undef VAR	444	#undef VAR
380	}	445	}
…		…
383	* allocate various perl stacks. This is an exact copy	448	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	449	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	450	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	451	* not usually need a lot of stackspace.
387	*/	452	*/
		453	#if CORO_PREFER_PERL_FUNCTIONS
		454	# define coro_init_stacks init_stacks
		455	#else
388	static void	456	static void
389	coro_init_stacks ()	457	coro_init_stacks (pTHX)
390	{	458	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	459	PL_curstackinfo = new_stackinfo(64, 6);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	460	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	461	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	462	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		463
396	PL_stack_base = AvARRAY(PL_curstack);	464	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	465	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	466	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		467
400	New(50,PL_tmps_stack,96,SV*);	468	New(50,PL_tmps_stack,64,SV*);
401	PL_tmps_floor = -1;	469	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	470	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	471	PL_tmps_max = 64;
404		472
405	New(54,PL_markstack,16,I32);	473	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	474	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	475	PL_markstack_max = PL_markstack + 16;
408		476
…		…
412		480
413	New(54,PL_scopestack,16,I32);	481	New(54,PL_scopestack,16,I32);
414	PL_scopestack_ix = 0;	482	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	483	PL_scopestack_max = 16;
416		484
417	New(54,PL_savestack,96,ANY);	485	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	486	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	487	PL_savestack_max = 64;
420		488
421	#if !PERL_VERSION_ATLEAST (5,9,0)	489	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	490	New(54,PL_retstack,4,OP*);
423	PL_retstack_ix = 0;	491	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	492	PL_retstack_max = 4;
425	#endif	493	#endif
426	}	494	}
		495	#endif
427		496
428	/*	497	/*
429	* destroy the stacks, the callchain etc...	498	* destroy the stacks, the callchain etc...
430	*/	499	*/
431	static void	500	static void
432	coro_destroy_stacks ()	501	coro_destroy_stacks (pTHX)
433	{	502	{
434	if (!IN_DESTRUCT)	503	if (!IN_DESTRUCT)
435	{	504	{
436	/* is this ugly, I ask? */	505	/* restore all saved variables and stuff */
437	LEAVE_SCOPE (0);	506	LEAVE_SCOPE (0);
		507	assert (PL_tmps_floor == -1);
438		508
439	/* sure it is, but more important: is it correct?? :/ */	509	/* free all temporaries */
440	FREETMPS;	510	FREETMPS;
		511	assert (PL_tmps_ix == -1);
441		512
		513	/* unwind all extra stacks */
442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	514	POPSTACK_TO (PL_mainstack);
		515
		516	/* unwind main stack */
		517	dounwind (-1);
443	}	518	}
444		519
445	while (PL_curstackinfo->si_next)	520	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	521	PL_curstackinfo = PL_curstackinfo->si_next;
447		522
448	while (PL_curstackinfo)	523	while (PL_curstackinfo)
449	{	524	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	525	PERL_SI *p = PL_curstackinfo->si_prev;
451		526
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	527	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	528	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		529
464	Safefree (PL_curstackinfo->si_cxstack);	530	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	531	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	532	PL_curstackinfo = p;
467	}	533	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	539	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	540	Safefree (PL_retstack);
475	#endif	541	#endif
476	}	542	}
477		543
		544	static size_t
		545	coro_rss (struct coro *coro)
		546	{
		547	size_t rss = sizeof (coro);
		548
		549	if (coro->mainstack)
		550	{
		551	if (coro->flags & CF_RUNNING)
		552	{
		553	#define VAR(name,type)coro->name = PL_ ## name;
		554	# include "state.h"
		555	#undef VAR
		556	}
		557
		558	rss += sizeof (coro->curstackinfo);
		559	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		560	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		561	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		562	rss += coro->tmps_max * sizeof (SV *);
		563	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		564	rss += coro->scopestack_max * sizeof (I32);
		565	rss += coro->savestack_max * sizeof (ANY);
		566
		567	#if !PERL_VERSION_ATLEAST (5,9,0)
		568	rss += coro->retstack_max * sizeof (OP *);
		569	#endif
		570	}
		571
		572	return rss;
		573	}
		574
		575	/** coroutine stack handling ************************************************/
		576
478	static void	577	static void
479	setup_coro (struct coro *coro)	578	setup_coro (pTHX_ struct coro *coro)
480	{	579	{
481	/*	580	/*
482	* emulate part of the perl startup here.	581	* emulate part of the perl startup here.
483	*/	582	*/
484
485	coro_init_stacks ();	583	coro_init_stacks (aTHX);
486		584
		585	PL_curcop = &PL_compiling;
		586	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	587	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	588	PL_curpm = 0;
		589	PL_localizing = 0;
		590	PL_dirty = 0;
		591	PL_restartop = 0;
490		592
491	{	593	{
492	dSP;	594	dSP;
493	LOGOP myop;	595	LOGOP myop;
494		596
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));	597	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;	598	GvAV (PL_defgv) = coro->args; coro->args = 0;
500		599
501	Zero (&myop, 1, LOGOP);	600	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	601	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	602	myop.op_flags = OPf_WANT_VOID;
504		603
		604	PUSHMARK (SP);
		605	XPUSHs (av_shift (GvAV (PL_defgv)));
		606	PUTBACK;
505	PL_op = (OP *)&myop;	607	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);	608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	609	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	610	}
515	}
516		611
		612	ENTER; /* necessary e.g. for dounwind */
		613	}
		614
517	static void	615	static void
518	free_coro_mortal ()	616	free_coro_mortal (pTHX)
519	{	617	{
520	if (coro_mortal)	618	if (coro_mortal)
521	{	619	{
522	SvREFCNT_dec (coro_mortal);	620	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	621	coro_mortal = 0;
524	}	622	}
525	}	623	}
526		624
		625	/* inject a fake call to Coro::State::_cctx_init into the execution */
		626	/* _cctx_init should be careful, as it could be called at almost any time */
		627	/* during execution of a perl program */
527	static void NOINLINE	628	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	629	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	630	{
530	dSP;	631	dSP;
531	LOGOP myop;	632	LOGOP myop;
532		633
533	Zero (&myop, 1, LOGOP);	634	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	635	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	636	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		637
539	PUSHMARK (SP);	638	PUSHMARK (SP);
		639	EXTEND (SP, 2);
		640	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	641	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	642	PUTBACK;
		643	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	644	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	645	SPAGAIN;
544	}	646	}
545		647
		648	/*
		649	* this is a _very_ stripped down perl interpreter ;)
		650	*/
546	static void	651	static void
547	coro_run (void *arg)	652	coro_run (void *arg)
548	{	653	{
		654	dTHX;
		655
549	/* coro_run is the alternative epilogue of transfer() */	656	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	657	UNLOCK;
551		658
		659	PL_top_env = &PL_start_env;
		660
		661	/* inject a fake subroutine call to cctx_init */
		662	prepare_cctx (aTHX_ (coro_cctx *)arg);
		663
		664	/* somebody or something will hit me for both perl_run and PL_restartop */
		665	PL_restartop = PL_op;
		666	perl_run (PL_curinterp);
		667
552	/*	668	/*
553	* this is a _very_ stripped down perl interpreter ;)	669	* If perl-run returns we assume exit() was being called or the coro
		670	* fell off the end, which seems to be the only valid (non-bug)
		671	* reason for perl_run to return. We try to exit by jumping to the
		672	* bootstrap-time "top" top_env, as we cannot restore the "main"
		673	* coroutine as Coro has no such concept
554	*/	674	*/
555	PL_top_env = &PL_start_env;	675	PL_top_env = main_top_env;
556		676	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	}	677	}
566		678
567	static coro_cctx *	679	static coro_cctx *
568	cctx_new ()	680	cctx_new ()
569	{	681	{
570	coro_cctx *cctx;	682	coro_cctx *cctx;
		683	void *stack_start;
		684	size_t stack_size;
571		685
572	++cctx_count;	686	++cctx_count;
573		687
574	New (0, cctx, 1, coro_cctx);	688	Newz (0, cctx, 1, coro_cctx);
575		689
576	#if HAVE_MMAP	690	#if HAVE_MMAP
577		691
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	692	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	693	/* 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);	694	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581		695
582	if (cctx->sptr == (void *)-1)	696	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	697	{
587
588	# if STACKGUARD	698	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	699	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	700	# endif
		701	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		702	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		703	cctx->mapped = 1;
		704	}
		705	else
		706	#endif
		707	{
		708	cctx->ssize = coro_stacksize * (long)sizeof (long);
		709	New (0, cctx->sptr, coro_stacksize, long);
591		710
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	711	if (!cctx->sptr)
598	{	712	{
599	perror ("FATAL: unable to malloc stack for coroutine");	713	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	714	_exit (EXIT_FAILURE);
601	}	715	}
602		716
603	#endif	717	stack_start = cctx->sptr;
		718	stack_size = cctx->ssize;
		719	}
604		720
605	#if USE_VALGRIND	721	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);	722	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
613		723
614	return cctx;	724	return cctx;
615	}	725	}
616		726
617	static void	727	static void
618	cctx_free (coro_cctx *cctx)	728	cctx_destroy (coro_cctx *cctx)
619	{	729	{
620	if (!cctx)	730	if (!cctx)
621	return;	731	return;
622		732
623	--cctx_count;	733	--cctx_count;
624		734
625	#if USE_VALGRIND	735	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	736	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	737	#endif
628		738
629	#if HAVE_MMAP	739	#if HAVE_MMAP
		740	if (cctx->mapped)
630	munmap (cctx->sptr, cctx->ssize);	741	munmap (cctx->sptr, cctx->ssize);
631	#else	742	else
		743	#endif
632	Safefree (cctx->sptr);	744	Safefree (cctx->sptr);
633	#endif
634		745
635	Safefree (cctx);	746	Safefree (cctx);
636	}	747	}
637		748
638	static coro_cctx *	749	static coro_cctx *
639	cctx_get ()	750	cctx_get (pTHX)
640	{	751	{
641	coro_cctx *cctx;
642
643	if (cctx_first)	752	while (cctx_first)
644	{	753	{
		754	coro_cctx *cctx = cctx_first;
		755	cctx_first = cctx->next;
645	--cctx_idle;	756	--cctx_idle;
646	cctx = cctx_first;	757
647	cctx_first = cctx->next;	758	if (cctx->ssize >= coro_stacksize)
		759	return cctx;
		760
		761	cctx_destroy (cctx);
648	}	762	}
649	else	763
650	{
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;	764	PL_op = PL_op->op_next;
653	}
654
655	return cctx;	765	return cctx_new ();
656	}	766	}
657		767
658	static void	768	static void
659	cctx_put (coro_cctx *cctx)	769	cctx_put (coro_cctx *cctx)
660	{	770	{
		771	/* free another cctx if overlimit */
		772	if (cctx_idle >= MAX_IDLE_CCTX)
		773	{
		774	coro_cctx *first = cctx_first;
		775	cctx_first = first->next;
		776	--cctx_idle;
		777
		778	assert (!first->inuse);
		779	cctx_destroy (first);
		780	}
		781
661	++cctx_idle;	782	++cctx_idle;
662	cctx->next = cctx_first;	783	cctx->next = cctx_first;
663	cctx_first = cctx;	784	cctx_first = cctx;
664	}	785	}
665		786
		787	/** coroutine switching *****************************************************/
		788
666	/* never call directly, always through the coro_state_transfer global variable */	789	/* never call directly, always through the coro_state_transfer global variable */
667	static void NOINLINE	790	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	791	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	792	{
670	dSTACKLEVEL;	793	dSTACKLEVEL;
671		794
672	/* sometimes transfer is only called to set idle_sp */	795	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	796	if (!next)
		797	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	798	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		799	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		800	}
675	else if (prev != next)	801	else if (prev != next)
676	{	802	{
677	coro_cctx *prev__cctx;	803	coro_cctx *prev__cctx;
678		804
679	if (!prev->cctx)	805	if (prev->flags & CF_NEW)
680	{	806	{
681	/* create a new empty context */	807	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	808	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	809	prev->cctx->inuse = 1;
		810	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	811	prev->flags |= CF_RUNNING;
685	}	812	}
686		813
		814	/*TODO: must not croak here */
687	assert ( prev->flags & CF_RUNNING);	815	if (!prev->flags & CF_RUNNING)
		816	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		817
688	assert (!next->flags & CF_RUNNING);	818	if (next->flags & CF_RUNNING)
		819	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		820
		821	if (next->flags & CF_DESTROYED)
		822	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
689		823
690	prev->flags &= ~CF_RUNNING;	824	prev->flags &= ~CF_RUNNING;
691	next->flags |= CF_RUNNING;	825	next->flags |= CF_RUNNING;
692		826
693	LOCK;	827	LOCK;
694		828
695	if (next->mainstack)	829	if (next->flags & CF_NEW)
696	{	830	{
697	/* coroutine already started */	831	/* need to start coroutine */
698	SAVE (prev, flags);	832	next->flags &= ~CF_NEW;
699	LOAD (next);	833	/* first get rid of the old state */
		834	save_perl (aTHX_ prev);
		835	/* setup coroutine call */
		836	setup_coro (aTHX_ next);
		837	/* need a new stack */
		838	assert (!next->cctx);
700	}	839	}
701	else	840	else
702	{	841	{
703	/* need to start coroutine */	842	/* coroutine already started */
704	/* first get rid of the old state */	843	save_perl (aTHX_ prev);
705	SAVE (prev, -1);	844	load_perl (aTHX_ next);
706	/* setup coroutine call */
707	setup_coro (next);
708	/* need a stack */
709	assert (!next->stack);
710	next->cctx = 0;
711	}	845	}
712		846
713	prev__cctx = prev->cctx;	847	prev__cctx = prev->cctx;
714		848
715	/* possibly "free" the cctx */	849	/* possibly "free" the cctx */
716	if (prev__cctx->idle_sp == STACKLEVEL)	850	if (prev__cctx->idle_sp == STACKLEVEL)
717	{	851	{
718	assert (PL_top_env == prev__cctx->top_env);//D	852	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		853	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		854
		855	prev->cctx = 0;
		856
719	cctx_put (prev__cctx);	857	cctx_put (prev__cctx);
720	prev->cctx = 0;	858	prev__cctx->inuse = 0;
721	}	859	}
722		860
723	if (!next->cctx)	861	if (!next->cctx)
		862	{
724	next->cctx = cctx_get ();	863	next->cctx = cctx_get (aTHX);
		864	assert (!next->cctx->inuse);
		865	next->cctx->inuse = 1;
		866	}
725		867
726	if (prev__cctx != next->cctx)	868	if (prev__cctx != next->cctx)
727	{	869	{
728	assert ( prev__cctx->inuse);
729	assert (!next->cctx->inuse);
730
731	prev__cctx->inuse = 0;
732	next->cctx->inuse = 1;
733
734	prev__cctx->top_env = PL_top_env;	870	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->cctx->top_env;	871	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	872	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	873	}
738		874
739	free_coro_mortal ();	875	free_coro_mortal (aTHX);
740
741	UNLOCK;	876	UNLOCK;
742	}	877	}
743	}	878	}
744		879
745	struct transfer_args	880	struct transfer_args
746	{	881	{
747	struct coro *prev, *next;	882	struct coro *prev, *next;
748	int flags;
749	};	883	};
750		884
751	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	885	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
752		886
		887	/** high level stuff ********************************************************/
		888
753	static void	889	static int
754	coro_state_destroy (struct coro *coro)	890	coro_state_destroy (pTHX_ struct coro *coro)
755	{	891	{
756	if (coro->refcnt--)	892	if (coro->flags & CF_DESTROYED)
757	return;	893	return 0;
		894
		895	coro->flags |= CF_DESTROYED;
		896
		897	if (coro->flags & CF_READY)
		898	{
		899	/* reduce nready, as destroying a ready coro effectively unreadies it */
		900	/* alternative: look through all ready queues and remove the coro */
		901	LOCK;
		902	--coro_nready;
		903	UNLOCK;
		904	}
		905	else
		906	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
758		907
759	if (coro->mainstack && coro->mainstack != main_mainstack)	908	if (coro->mainstack && coro->mainstack != main_mainstack)
760	{	909	{
761	struct coro temp;	910	struct coro temp;
762		911
763	SAVE ((&temp), TRANSFER_SAVE_ALL);	912	assert (!(coro->flags & CF_RUNNING));
764	LOAD (coro);
765		913
		914	Zero (&temp, 1, struct coro);
		915	temp.save = CORO_SAVE_ALL;
		916
		917	if (coro->flags & CF_RUNNING)
		918	croak ("FATAL: tried to destroy currently running coroutine");
		919
		920	save_perl (aTHX_ &temp);
		921	load_perl (aTHX_ coro);
		922
766	coro_destroy_stacks ();	923	coro_destroy_stacks (aTHX);
767		924
768	LOAD ((&temp)); /* this will get rid of defsv etc.. */	925	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
769		926
770	coro->mainstack = 0;	927	coro->mainstack = 0;
771	}	928	}
772		929
773	cctx_free (coro->cctx);	930	cctx_destroy (coro->cctx);
774	SvREFCNT_dec (coro->args);	931	SvREFCNT_dec (coro->args);
775	Safefree (coro);	932
		933	if (coro->next) coro->next->prev = coro->prev;
		934	if (coro->prev) coro->prev->next = coro->next;
		935	if (coro == coro_first) coro_first = coro->next;
		936
		937	return 1;
776	}	938	}
777		939
778	static int	940	static int
779	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	941	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
780	{	942	{
781	struct coro *coro = (struct coro *)mg->mg_ptr;	943	struct coro *coro = (struct coro *)mg->mg_ptr;
782	mg->mg_ptr = 0;	944	mg->mg_ptr = 0;
783		945
		946	coro->hv = 0;
		947
		948	if (--coro->refcnt < 0)
		949	{
784	coro_state_destroy (coro);	950	coro_state_destroy (aTHX_ coro);
		951	Safefree (coro);
		952	}
785		953
786	return 0;	954	return 0;
787	}	955	}
788		956
789	static int	957	static int
…		…
796	return 0;	964	return 0;
797	}	965	}
798		966
799	static MGVTBL coro_state_vtbl = {	967	static MGVTBL coro_state_vtbl = {
800	0, 0, 0, 0,	968	0, 0, 0, 0,
801	coro_state_clear,	969	coro_state_free,
802	0,	970	0,
803	#ifdef MGf_DUP	971	#ifdef MGf_DUP
804	coro_state_dup,	972	coro_state_dup,
805	#else	973	#else
806	# define MGf_DUP 0	974	# define MGf_DUP 0
807	#endif	975	#endif
808	};	976	};
809		977
810	static struct coro *	978	static struct coro *
811	SvSTATE (SV *coro)	979	SvSTATE_ (pTHX_ SV *coro)
812	{	980	{
813	HV *stash;	981	HV *stash;
814	MAGIC *mg;	982	MAGIC *mg;
815		983
816	if (SvROK (coro))	984	if (SvROK (coro))
…		…
822	/* very slow, but rare, check */	990	/* very slow, but rare, check */
823	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	991	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
824	croak ("Coro::State object required");	992	croak ("Coro::State object required");
825	}	993	}
826		994
827	mg = SvMAGIC (coro);	995	mg = CORO_MAGIC (coro);
828	assert (mg->mg_type == PERL_MAGIC_ext);
829	return (struct coro *)mg->mg_ptr;	996	return (struct coro *)mg->mg_ptr;
830	}	997	}
831		998
		999	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1000
832	static void	1001	static void
833	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1002	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
834	{	1003	{
835	ta->prev = SvSTATE (prev);	1004	ta->prev = SvSTATE (prev_sv);
836	ta->next = SvSTATE (next);	1005	ta->next = SvSTATE (next_sv);
837	ta->flags = flags;
838	}	1006	}
839		1007
840	static void	1008	static void
841	api_transfer (SV *prev, SV *next, int flags)	1009	api_transfer (SV *prev_sv, SV *next_sv)
842	{	1010	{
843	dTHX;	1011	dTHX;
844	struct transfer_args ta;	1012	struct transfer_args ta;
845		1013
846	prepare_transfer (&ta, prev, next, flags);	1014	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
847	TRANSFER (ta);	1015	TRANSFER (ta);
848	}	1016	}
849		1017
		1018	static int
		1019	api_save (SV *coro_sv, int new_save)
		1020	{
		1021	dTHX;
		1022	struct coro *coro = SvSTATE (coro_sv);
		1023	int old_save = coro->save;
		1024
		1025	if (new_save >= 0)
		1026	coro->save = new_save;
		1027
		1028	return old_save;
		1029	}
		1030
850	/** Coro ********************************************************************/	1031	/** Coro ********************************************************************/
851		1032
852	#define PRIO_MAX 3
853	#define PRIO_HIGH 1
854	#define PRIO_NORMAL 0
855	#define PRIO_LOW -1
856	#define PRIO_IDLE -3
857	#define PRIO_MIN -4
858
859	/* for Coro.pm */
860	static GV *coro_current, *coro_idle;
861	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
862	static int coro_nready;
863
864	static void	1033	static void
865	coro_enq (SV *sv)	1034	coro_enq (pTHX_ SV *coro_sv)
866	{	1035	{
867	int prio;
868
869	if (SvTYPE (sv) != SVt_PVHV)
870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
871
872	prio = SvSTATE (sv)->prio;
873
874	av_push (coro_ready [prio - PRIO_MIN], sv);	1036	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875	coro_nready++;
876	}	1037	}
877		1038
878	static SV *	1039	static SV *
879	coro_deq (int min_prio)	1040	coro_deq (pTHX_ int min_prio)
880	{	1041	{
881	int prio = PRIO_MAX - PRIO_MIN;	1042	int prio = PRIO_MAX - PRIO_MIN;
882		1043
883	min_prio -= PRIO_MIN;	1044	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1045	if (min_prio < 0)
885	min_prio = 0;	1046	min_prio = 0;
886		1047
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1048	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (AvFILLp (coro_ready [prio]) >= 0)	1049	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready [prio]);	1050	return av_shift (coro_ready [prio]);
892	}
893		1051
894	return 0;	1052	return 0;
895	}	1053	}
896		1054
897	static int	1055	static int
898	api_ready (SV *coro_sv)	1056	api_ready (SV *coro_sv)
899	{	1057	{
		1058	dTHX;
900	struct coro *coro;	1059	struct coro *coro;
901		1060
902	if (SvROK (coro_sv))	1061	if (SvROK (coro_sv))
903	coro_sv = SvRV (coro_sv);	1062	coro_sv = SvRV (coro_sv);
904		1063
905	coro = SvSTATE (coro_sv);	1064	coro = SvSTATE (coro_sv);
		1065
906	if (coro->flags & CF_READY)	1066	if (coro->flags & CF_READY)
907	return 0;	1067	return 0;
908		1068
909	coro->flags |= CF_READY;	1069	coro->flags |= CF_READY;
910		1070
911	LOCK;	1071	LOCK;
912	coro_enq (SvREFCNT_inc (coro_sv));	1072	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1073	++coro_nready;
913	UNLOCK;	1074	UNLOCK;
914		1075
915	return 1;	1076	return 1;
916	}	1077	}
917		1078
918	static int	1079	static int
919	api_is_ready (SV *coro_sv)	1080	api_is_ready (SV *coro_sv)
920	{	1081	{
921	struct coro *coro;	1082	dTHX;
922
923	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1083	return !!(SvSTATE (coro_sv)->flags & CF_READY);
924	}	1084	}
925		1085
926	static void	1086	static void
927	prepare_schedule (struct transfer_args *ta)	1087	prepare_schedule (pTHX_ struct transfer_args *ta)
928	{	1088	{
929	SV *current, *prev, *next;	1089	SV *prev_sv, *next_sv;
930
931	current = GvSV (coro_current);
932		1090
933	for (;;)	1091	for (;;)
934	{	1092	{
935	LOCK;	1093	LOCK;
936	next = coro_deq (PRIO_MIN);	1094	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1095
		1096	/* nothing to schedule: call the idle handler */
		1097	if (!next_sv)
		1098	{
		1099	dSP;
		1100	UNLOCK;
		1101
		1102	ENTER;
		1103	SAVETMPS;
		1104
		1105	PUSHMARK (SP);
		1106	PUTBACK;
		1107	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1108
		1109	FREETMPS;
		1110	LEAVE;
		1111	continue;
		1112	}
		1113
		1114	ta->next = SvSTATE (next_sv);
		1115
		1116	/* cannot transfer to destroyed coros, skip and look for next */
		1117	if (ta->next->flags & CF_DESTROYED)
		1118	{
		1119	UNLOCK;
		1120	SvREFCNT_dec (next_sv);
		1121	/* coro_nready is already taken care of by destroy */
		1122	continue;
		1123	}
		1124
		1125	--coro_nready;
937	UNLOCK;	1126	UNLOCK;
938
939	if (next)
940	break;	1127	break;
941
942	{
943	dSP;
944
945	ENTER;
946	SAVETMPS;
947
948	PUSHMARK (SP);
949	PUTBACK;
950	call_sv (GvSV (coro_idle), G_DISCARD);
951
952	FREETMPS;
953	LEAVE;
954	}	1128	}
955	}
956
957	prev = SvRV (current);
958	SvRV (current) = next;
959		1129
960	/* free this only after the transfer */	1130	/* free this only after the transfer */
		1131	prev_sv = SvRV (coro_current);
		1132	SvRV_set (coro_current, next_sv);
		1133	ta->prev = SvSTATE (prev_sv);
		1134
		1135	assert (ta->next->flags & CF_READY);
		1136	ta->next->flags &= ~CF_READY;
		1137
961	LOCK;	1138	LOCK;
962	free_coro_mortal ();	1139	free_coro_mortal (aTHX);
		1140	coro_mortal = prev_sv;
963	UNLOCK;	1141	UNLOCK;
964	coro_mortal = prev;
965
966	ta->prev = SvSTATE (prev);
967	ta->next = SvSTATE (next);
968	ta->flags = TRANSFER_SAVE_ALL;
969
970	ta->next->flags &= ~CF_READY;
971	}	1142	}
972		1143
973	static void	1144	static void
974	prepare_cede (struct transfer_args *ta)	1145	prepare_cede (pTHX_ struct transfer_args *ta)
975	{	1146	{
976	api_ready (GvSV (coro_current));	1147	api_ready (coro_current);
977
978	prepare_schedule (ta);	1148	prepare_schedule (aTHX_ ta);
		1149	}
		1150
		1151	static int
		1152	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1153	{
		1154	if (coro_nready)
		1155	{
		1156	SV *prev = SvRV (coro_current);
		1157	prepare_schedule (aTHX_ ta);
		1158	api_ready (prev);
		1159	return 1;
		1160	}
		1161	else
		1162	return 0;
979	}	1163	}
980		1164
981	static void	1165	static void
982	api_schedule (void)	1166	api_schedule (void)
983	{	1167	{
984	dTHX;	1168	dTHX;
985	struct transfer_args ta;	1169	struct transfer_args ta;
986		1170
987	prepare_schedule (&ta);	1171	prepare_schedule (aTHX_ &ta);
988	TRANSFER (ta);	1172	TRANSFER (ta);
989	}	1173	}
990		1174
991	static void	1175	static int
992	api_cede (void)	1176	api_cede (void)
993	{	1177	{
994	dTHX;	1178	dTHX;
995	struct transfer_args ta;	1179	struct transfer_args ta;
996		1180
997	prepare_cede (&ta);	1181	prepare_cede (aTHX_ &ta);
		1182
		1183	if (ta.prev != ta.next)
		1184	{
998	TRANSFER (ta);	1185	TRANSFER (ta);
		1186	return 1;
		1187	}
		1188	else
		1189	return 0;
		1190	}
		1191
		1192	static int
		1193	api_cede_notself (void)
		1194	{
		1195	dTHX;
		1196	struct transfer_args ta;
		1197
		1198	if (prepare_cede_notself (aTHX_ &ta))
		1199	{
		1200	TRANSFER (ta);
		1201	return 1;
		1202	}
		1203	else
		1204	return 0;
999	}	1205	}
1000		1206
1001	MODULE = Coro::State PACKAGE = Coro::State	1207	MODULE = Coro::State PACKAGE = Coro::State
1002		1208
1003	PROTOTYPES: DISABLE	1209	PROTOTYPES: DISABLE
…		…
1009	#endif	1215	#endif
1010	BOOT_PAGESIZE;	1216	BOOT_PAGESIZE;
1011		1217
1012	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1218	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1013		1219
1014	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1015	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1016	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1225	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1226	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1017		1227
1018	main_mainstack = PL_mainstack;	1228	main_mainstack = PL_mainstack;
		1229	main_top_env = PL_top_env;
		1230
		1231	while (main_top_env->je_prev)
		1232	main_top_env = main_top_env->je_prev;
1019		1233
1020	coroapi.ver = CORO_API_VERSION;	1234	coroapi.ver = CORO_API_VERSION;
1021	coroapi.transfer = api_transfer;	1235	coroapi.transfer = api_transfer;
1022		1236
1023	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1237	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1031	HV *hv;	1245	HV *hv;
1032	int i;	1246	int i;
1033		1247
1034	Newz (0, coro, 1, struct coro);	1248	Newz (0, coro, 1, struct coro);
1035	coro->args = newAV ();	1249	coro->args = newAV ();
		1250	coro->save = CORO_SAVE_DEF;
		1251	coro->flags = CF_NEW;
1036		1252
		1253	if (coro_first) coro_first->prev = coro;
		1254	coro->next = coro_first;
		1255	coro_first = coro;
		1256
1037	hv = newHV ();	1257	coro->hv = hv = newHV ();
1038	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1258	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1039	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1259	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1040		1260
1041	for (i = 1; i < items; i++)	1261	for (i = 1; i < items; i++)
1042	av_push (coro->args, newSVsv (ST (i)));	1262	av_push (coro->args, newSVsv (ST (i)));
1043	}	1263	}
1044	OUTPUT:	1264	OUTPUT:
		1265	RETVAL
		1266
		1267	int
		1268	save (SV *coro, int new_save = -1)
		1269	CODE:
		1270	RETVAL = api_save (coro, new_save);
		1271	OUTPUT:
		1272	RETVAL
		1273
		1274	int
		1275	save_also (SV *coro_sv, int save_also)
		1276	CODE:
		1277	{
		1278	struct coro *coro = SvSTATE (coro_sv);
		1279	RETVAL = coro->save;
		1280	coro->save |= save_also;
		1281	}
		1282	OUTPUT:
1045	RETVAL	1283	RETVAL
1046		1284
1047	void	1285	void
1048	_set_stacklevel (...)	1286	_set_stacklevel (...)
1049	ALIAS:	1287	ALIAS:
1050	Coro::State::transfer = 1	1288	Coro::State::transfer = 1
1051	Coro::schedule = 2	1289	Coro::schedule = 2
1052	Coro::cede = 3	1290	Coro::cede = 3
1053	Coro::Cont::yield = 4	1291	Coro::cede_notself = 4
1054	CODE:	1292	CODE:
1055	{	1293	{
1056	struct transfer_args ta;	1294	struct transfer_args ta;
1057		1295
1058	switch (ix)	1296	switch (ix)
1059	{	1297	{
1060	case 0:	1298	case 0:
1061	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1299	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1062	ta.next = 0;	1300	ta.next = 0;
1063	ta.flags = TRANSFER_SET_STACKLEVEL;
1064	break;	1301	break;
1065		1302
1066	case 1:	1303	case 1:
1067	if (items != 3)	1304	if (items != 2)
1068	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1305	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1069		1306
1070	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1307	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1071	break;	1308	break;
1072		1309
1073	case 2:	1310	case 2:
1074	prepare_schedule (&ta);	1311	prepare_schedule (aTHX_ &ta);
1075	break;	1312	break;
1076		1313
1077	case 3:	1314	case 3:
1078	prepare_cede (&ta);	1315	prepare_cede (aTHX_ &ta);
1079	break;	1316	break;
1080		1317
1081	case 4:	1318	case 4:
1082	{	1319	if (!prepare_cede_notself (aTHX_ &ta))
1083	SV *yieldstack;	1320	XSRETURN_EMPTY;
1084	SV *sv;
1085	AV *defav = GvAV (PL_defgv);
1086		1321
1087	yieldstack = *hv_fetch (
1088	(HV *)SvRV (GvSV (coro_current)),
1089	"yieldstack", sizeof ("yieldstack") - 1,
1090	0
1091	);
1092
1093	/* set up @_ -- ugly */
1094	av_clear (defav);
1095	av_fill (defav, items - 1);
1096	while (items--)
1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099	sv = av_pop ((AV *)SvRV (yieldstack));
1100	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102	ta.flags = 0;
1103	SvREFCNT_dec (sv);
1104	}
1105	break;	1322	break;
1106
1107	}	1323	}
1108		1324
		1325	BARRIER;
1109	TRANSFER (ta);	1326	TRANSFER (ta);
1110	}
1111		1327
1112	void	1328	if (GIMME_V != G_VOID && ta.next != ta.prev)
1113	_clone_state_from (SV *dst, SV *src)	1329	XSRETURN_YES;
		1330	}
		1331
		1332	bool
		1333	_destroy (SV *coro_sv)
1114	CODE:	1334	CODE:
1115	{	1335	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1116	struct coro *coro_src = SvSTATE (src);	1336	OUTPUT:
1117		1337	RETVAL
1118	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1119
1120	++coro_src->refcnt;
1121	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1122	}
1123		1338
1124	void	1339	void
1125	_exit (code)	1340	_exit (code)
1126	int code	1341	int code
1127	PROTOTYPE: $	1342	PROTOTYPE: $
1128	CODE:	1343	CODE:
1129	_exit (code);	1344	_exit (code);
1130		1345
1131	int	1346	int
		1347	cctx_stacksize (int new_stacksize = 0)
		1348	CODE:
		1349	RETVAL = coro_stacksize;
		1350	if (new_stacksize)
		1351	coro_stacksize = new_stacksize;
		1352	OUTPUT:
		1353	RETVAL
		1354
		1355	int
1132	cctx_count ()	1356	cctx_count ()
1133	CODE:	1357	CODE:
1134	RETVAL = cctx_count;	1358	RETVAL = cctx_count;
1135	OUTPUT:	1359	OUTPUT:
1136	RETVAL	1360	RETVAL
…		…
1140	CODE:	1364	CODE:
1141	RETVAL = cctx_idle;	1365	RETVAL = cctx_idle;
1142	OUTPUT:	1366	OUTPUT:
1143	RETVAL	1367	RETVAL
1144		1368
		1369	void
		1370	list ()
		1371	PPCODE:
		1372	{
		1373	struct coro *coro;
		1374	for (coro = coro_first; coro; coro = coro->next)
		1375	if (coro->hv)
		1376	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1377	}
		1378
		1379	void
		1380	_eval (Coro::State coro, SV *coderef)
		1381	CODE:
		1382	{
		1383	if (coro->mainstack)
		1384	{
		1385	struct coro temp;
		1386	Zero (&temp, 1, struct coro);
		1387	temp.save = CORO_SAVE_ALL;
		1388
		1389	if (!(coro->flags & CF_RUNNING))
		1390	{
		1391	save_perl (aTHX_ &temp);
		1392	load_perl (aTHX_ coro);
		1393	}
		1394
		1395	{
		1396	dSP;
		1397	ENTER;
		1398	SAVETMPS;
		1399	PUSHMARK (SP);
		1400	PUTBACK;
		1401	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1402	SPAGAIN;
		1403	FREETMPS;
		1404	LEAVE;
		1405	PUTBACK;
		1406	}
		1407
		1408	if (!(coro->flags & CF_RUNNING))
		1409	{
		1410	save_perl (aTHX_ coro);
		1411	load_perl (aTHX_ &temp);
		1412	}
		1413	}
		1414	}
		1415
		1416	SV *
		1417	is_ready (Coro::State coro)
		1418	PROTOTYPE: $
		1419	ALIAS:
		1420	is_ready = CF_READY
		1421	is_running = CF_RUNNING
		1422	is_new = CF_NEW
		1423	is_destroyed = CF_DESTROYED
		1424	CODE:
		1425	RETVAL = boolSV (coro->flags & ix);
		1426	OUTPUT:
		1427	RETVAL
		1428
		1429	IV
		1430	rss (Coro::State coro)
		1431	PROTOTYPE: $
		1432	CODE:
		1433	RETVAL = coro_rss (coro);
		1434	OUTPUT:
		1435	RETVAL
		1436
		1437
1145	MODULE = Coro::State PACKAGE = Coro	1438	MODULE = Coro::State PACKAGE = Coro
1146		1439
1147	BOOT:	1440	BOOT:
1148	{	1441	{
1149	int i;	1442	int i;
…		…
1155	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1448	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1156	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1449	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1157	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1450	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1158	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1451	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1159		1452
1160	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1453	coro_current = get_sv ("Coro::current", FALSE);
1161	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1454	SvREADONLY_on (coro_current);
1162		1455
1163	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1456	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1164	coro_ready[i] = newAV ();	1457	coro_ready[i] = newAV ();
1165		1458
1166	{	1459	{
1167	SV *sv = perl_get_sv("Coro::API", 1);	1460	SV *sv = perl_get_sv("Coro::API", 1);
1168		1461
1169	coroapi.schedule = api_schedule;	1462	coroapi.schedule = api_schedule;
		1463	coroapi.save = api_save;
1170	coroapi.cede = api_cede;	1464	coroapi.cede = api_cede;
		1465	coroapi.cede_notself = api_cede_notself;
1171	coroapi.ready = api_ready;	1466	coroapi.ready = api_ready;
1172	coroapi.is_ready = api_is_ready;	1467	coroapi.is_ready = api_is_ready;
1173	coroapi.nready = &coro_nready;	1468	coroapi.nready = &coro_nready;
1174	coroapi.current = coro_current;	1469	coroapi.current = coro_current;
1175		1470
1176	GCoroAPI = &coroapi;	1471	GCoroAPI = &coroapi;
1177	sv_setiv (sv, (IV)&coroapi);	1472	sv_setiv (sv, (IV)&coroapi);
1178	SvREADONLY_on (sv);	1473	SvREADONLY_on (sv);
1179	}	1474	}
1180	}	1475	}
		1476
		1477	void
		1478	_set_current (SV *current)
		1479	PROTOTYPE: $
		1480	CODE:
		1481	SvREFCNT_dec (SvRV (coro_current));
		1482	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1181		1483
1182	int	1484	int
1183	prio (Coro::State coro, int newprio = 0)	1485	prio (Coro::State coro, int newprio = 0)
1184	ALIAS:	1486	ALIAS:
1185	nice = 1	1487	nice = 1
…		…
1188	RETVAL = coro->prio;	1490	RETVAL = coro->prio;
1189		1491
1190	if (items > 1)	1492	if (items > 1)
1191	{	1493	{
1192	if (ix)	1494	if (ix)
1193	newprio += coro->prio;	1495	newprio = coro->prio - newprio;
1194		1496
1195	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1497	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1196	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1498	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1197		1499
1198	coro->prio = newprio;	1500	coro->prio = newprio;
1199	}	1501	}
1200	}	1502	}
		1503	OUTPUT:
		1504	RETVAL
1201		1505
1202	SV *	1506	SV *
1203	ready (SV *self)	1507	ready (SV *self)
1204	PROTOTYPE: $	1508	PROTOTYPE: $
1205	CODE:	1509	CODE:
1206	RETVAL = boolSV (api_ready (self));	1510	RETVAL = boolSV (api_ready (self));
1207	OUTPUT:	1511	OUTPUT:
1208	RETVAL	1512	RETVAL
1209		1513
1210	SV *
1211	is_ready (SV *self)
1212	PROTOTYPE: $
1213	CODE:
1214	RETVAL = boolSV (api_is_ready (self));
1215	OUTPUT:
1216	RETVAL
1217
1218	int	1514	int
1219	nready (...)	1515	nready (...)
1220	PROTOTYPE:	1516	PROTOTYPE:
1221	CODE:	1517	CODE:
1222	RETVAL = coro_nready;	1518	RETVAL = coro_nready;
…		…
1227		1523
1228	SV *	1524	SV *
1229	_get_state ()	1525	_get_state ()
1230	CODE:	1526	CODE:
1231	{	1527	{
1232	struct {	1528	struct io_state *data;
1233	int errorno;
1234	int laststype;
1235	int laststatval;
1236	Stat_t statcache;
1237	} data;
1238		1529
		1530	RETVAL = newSV (sizeof (struct io_state));
		1531	data = (struct io_state *)SvPVX (RETVAL);
		1532	SvCUR_set (RETVAL, sizeof (struct io_state));
		1533	SvPOK_only (RETVAL);
		1534
1239	data.errorno = errno;	1535	data->errorno = errno;
1240	data.laststype = PL_laststype;	1536	data->laststype = PL_laststype;
1241	data.laststatval = PL_laststatval;	1537	data->laststatval = PL_laststatval;
1242	data.statcache = PL_statcache;	1538	data->statcache = PL_statcache;
1243
1244	RETVAL = newSVpvn ((char *)&data, sizeof data);
1245	}	1539	}
1246	OUTPUT:	1540	OUTPUT:
1247	RETVAL	1541	RETVAL
1248		1542
1249	void	1543	void
1250	_set_state (char *data_)	1544	_set_state (char *data_)
1251	PROTOTYPE: $	1545	PROTOTYPE: $
1252	CODE:	1546	CODE:
1253	{	1547	{
1254	struct {	1548	struct io_state *data = (void *)data_;
1255	int errorno;
1256	int laststype;
1257	int laststatval;
1258	Stat_t statcache;
1259	} *data = (void *)data_;
1260		1549
1261	errno = data->errorno;	1550	errno = data->errorno;
1262	PL_laststype = data->laststype;	1551	PL_laststype = data->laststype;
1263	PL_laststatval = data->laststatval;	1552	PL_laststatval = data->laststatval;
1264	PL_statcache = data->statcache;	1553	PL_statcache = data->statcache;
1265	}	1554	}
		1555

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