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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.115 by root, Fri Dec 1 13:36:08 2006 UTC vs.
Revision 1.156 by root, Fri Sep 21 01:10:55 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
77	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
78	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
79	* and should be unique. */	95	* and should be unique. */
80	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
82		98
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		100
85	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
87	#else	104	#else
88	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
89	#endif	107	#endif
90		108
91	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
92		110
93	#include "CoroAPI.h"	111	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		112
97	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	117	#else
102	# define LOCK (void)0	118	# define LOCK (void)0
103	# define UNLOCK (void)0	119	# define UNLOCK (void)0
104	#endif	120	#endif
105		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
106	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
107	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
108	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
109	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
110		137
111	static struct coro_cctx *cctx_first;	138	static struct coro_cctx *cctx_first;
112	static int cctx_count, cctx_idle;	139	static int cctx_count, cctx_idle;
…		…
115	typedef struct coro_cctx {	142	typedef struct coro_cctx {
116	struct coro_cctx *next;	143	struct coro_cctx *next;
117		144
118	/* the stack */	145	/* the stack */
119	void *sptr;	146	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
121		148
122	/* cpu state */	149	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	152	JMPENV *top_env;
125	coro_context cctx;	153	coro_context cctx;
126		154
127	int inuse;
128
129	#if USE_VALGRIND	155	#if CORO_USE_VALGRIND
130	int valgrind_id;	156	int valgrind_id;
131	#endif	157	#endif
		158	char inuse, mapped;
132	} coro_cctx;	159	} coro_cctx;
133		160
134	enum {	161	enum {
135	CF_RUNNING, /* coroutine is running */	162	CF_RUNNING = 0x0001, /* coroutine is running */
136	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 */
137	};	166	};
138		167
139	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
140	struct coro {	169	struct coro {
141	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
142	coro_cctx *cctx;	171	coro_cctx *cctx;
143		172
144	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
145	AV *args;	174	AV *args;
146	int refcnt;	175	int refcnt;
147	int flags;	176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
148		178
149	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
150	AV *defav;	180	AV *defav; /* @_ */
151	SV *defsv;	181	SV *defsv; /* $_ */
152	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
153		186
154	#define VAR(name,type) type name;	187	#define VAR(name,type) type name;
155	# include "state.h"	188	# include "state.h"
156	#undef VAR	189	#undef VAR
157		190
158	/* coro process data */	191	/* coro process data */
159	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 */
160	};	197	};
161		198
162	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
163	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
164		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
165	static AV *	219	static AV *
166	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
167	{	221	{
168	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
169	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
170		224
171	newpadlist = newAV ();	225	newpadlist = newAV ();
…		…
183		237
184	return newpadlist;	238	return newpadlist;
185	}	239	}
186		240
187	static void	241	static void
188	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
189	{	243	{
190	/* may be during global destruction */	244	/* may be during global destruction */
191	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
192	{	246	{
193	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
214	AV *padlist;	268	AV *padlist;
215	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
216		270
217	/* casting is fun. */	271	/* casting is fun. */
218	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
219	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
220		274
221	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
222		276
223	return 0;	277	return 0;
224	}	278	}
…		…
234	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
235	: 0	289	: 0
236		290
237	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
238	static void	292	static void
239	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
240	{	294	{
241	MAGIC *mg = CORO_MAGIC (cv);	295	MAGIC *mg = CORO_MAGIC (cv);
242	AV *av;	296	AV *av;
243		297
244	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
245	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
246	else	300	else
247	{	301	{
248	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
249	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
250	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
251	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
252	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
253	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
254	#else	308	#else
255	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
256	#endif	310	#endif
257	}	311	}
258	}	312	}
259		313
260	static void	314	static void
261	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
262	{	316	{
263	MAGIC *mg = CORO_MAGIC (cv);	317	MAGIC *mg = CORO_MAGIC (cv);
264	AV *av;	318	AV *av;
265		319
266	if (!mg)	320	if (!mg)
…		…
277	av_extend (av, AvMAX (av) + 1);	331	av_extend (av, AvMAX (av) + 1);
278		332
279	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280	}	334	}
281		335
		336	/** load & save, init *******************************************************/
		337
282	#define SB do {	338	#define SB do {
283	#define SE } while (0)	339	#define SE } while (0)
284		340
285	#define LOAD(state) load_state((state));
286	#define SAVE(state,flags) save_state((state),(flags));
287
288	#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
289		342
290	static void	343	static void
291	load_state(Coro__State c)	344	load_perl (pTHX_ Coro__State c)
292	{	345	{
293	#define VAR(name,type) PL_ ## name = c->name;	346	#define VAR(name,type) PL_ ## name = c->name;
294	# include "state.h"	347	# include "state.h"
295	#undef VAR	348	#undef VAR
296		349
297	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
298	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
299	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	}
300		369
301	{	370	{
302	dSP;	371	dSP;
303	CV *cv;	372	CV *cv;
304		373
305	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
306	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
307	{	376	{
308	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
309	CvDEPTH (cv) = PTR2IV (POPs);	378	CvDEPTH (cv) = PTR2IV (POPs);
310	CvPADLIST (cv) = (AV *)POPs;	379	CvPADLIST (cv) = (AV *)POPs;
311	}	380	}
312		381
313	PUTBACK;	382	PUTBACK;
314	}	383	}
315	}	384	}
316		385
317	static void	386	static void
318	save_state(Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
319	{	388	{
320	{	389	{
321	dSP;	390	dSP;
322	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
323	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
326	/*	395	/*
327	* 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
328	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
329	*/	398	*/
330		399
		400	EXTEND (SP, 3 + 1);
331	PUSHs (Nullsv);	401	PUSHs (Nullsv);
332	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
333	for (;;)	403	for (;;)
334	{	404	{
335	while (cxix >= 0)	405	while (cxix >= 0)
336	{	406	{
337	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
338		408
339	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
340	{	410	{
341	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
342		412
343	if (CvDEPTH (cv))	413	if (CvDEPTH (cv))
344	{	414	{
345	EXTEND (SP, 3);	415	EXTEND (SP, 3);
346
347	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
348	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
349	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
350		419
351	CvDEPTH (cv) = 0;	420	CvDEPTH (cv) = 0;
352	get_padlist (cv);	421	get_padlist (aTHX_ cv);
353	}	422	}
354	}	423	}
355	#ifdef CXt_FORMAT
356	else if (CxTYPE(cx) == CXt_FORMAT)
357	{
358	/* I never used formats, so how should I know how these are implemented? */
359	/* my bold guess is as a simple, plain sub... */
360	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
361	}
362	#endif
363	}	424	}
364		425
365	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
366	break;	427	break;
367		428
…		…
371	}	432	}
372		433
373	PUTBACK;	434	PUTBACK;
374	}	435	}
375		436
376	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;
377	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
378	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;
379		442
380	#define VAR(name,type)c->name = PL_ ## name;	443	#define VAR(name,type)c->name = PL_ ## name;
381	# include "state.h"	444	# include "state.h"
382	#undef VAR	445	#undef VAR
383	}	446	}
…		…
386	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
387	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
388	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
389	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
390	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
391	static void	457	static void
392	coro_init_stacks ()	458	coro_init_stacks (pTHX)
393	{	459	{
394	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(64, 6);
395	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
396	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
397	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
398		464
399	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
400	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
401	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
402		468
403	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,64,SV*);
404	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
405	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
406	PL_tmps_max = 96;	472	PL_tmps_max = 64;
407		473
408	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,16,I32);
409	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
410	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 16;
411		477
…		…
415		481
416	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,16,I32);
417	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
418	PL_scopestack_max = 16;	484	PL_scopestack_max = 16;
419		485
420	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
421	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
422	PL_savestack_max = 96;	488	PL_savestack_max = 64;
423		489
424	#if !PERL_VERSION_ATLEAST (5,9,0)	490	#if !PERL_VERSION_ATLEAST (5,9,0)
425	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,4,OP*);
426	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
427	PL_retstack_max = 8;	493	PL_retstack_max = 4;
428	#endif	494	#endif
429	}	495	}
		496	#endif
430		497
431	/*	498	/*
432	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
433	*/	500	*/
434	static void	501	static void
435	coro_destroy_stacks ()	502	coro_destroy_stacks (pTHX)
436	{	503	{
437	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
438	{	505	{
439	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
440	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
441		509
442	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
443	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
444		513
		514	/* unwind all extra stacks */
445	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
446	}	519	}
447		520
448	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
449	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
450		523
451	while (PL_curstackinfo)	524	while (PL_curstackinfo)
452	{	525	{
453	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
454		527
455	{ /*D*//*remove*/
456	dSP;
457	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
458	PUTBACK; /* possibly superfluous */
459	}
460
461	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
462	{
463	dounwind (-1);/*D*//*remove*/
464	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
465	}
466		530
467	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
468	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
469	PL_curstackinfo = p;	533	PL_curstackinfo = p;
470	}	534	}
…		…
476	#if !PERL_VERSION_ATLEAST (5,9,0)	540	#if !PERL_VERSION_ATLEAST (5,9,0)
477	Safefree (PL_retstack);	541	Safefree (PL_retstack);
478	#endif	542	#endif
479	}	543	}
480		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
481	static void	578	static void
482	setup_coro (struct coro *coro)	579	setup_coro (pTHX_ struct coro *coro)
483	{	580	{
484	/*	581	/*
485	* emulate part of the perl startup here.	582	* emulate part of the perl startup here.
486	*/	583	*/
487
488	coro_init_stacks ();	584	coro_init_stacks (aTHX);
489		585
		586	PL_curcop = &PL_compiling;
		587	PL_in_eval = EVAL_NULL;
490	PL_curcop = 0;	588	PL_comppad = 0;
491	PL_in_eval = 0;
492	PL_curpm = 0;	589	PL_curpm = 0;
		590	PL_localizing = 0;
		591	PL_dirty = 0;
		592	PL_restartop = 0;
493		593
494	{	594	{
495	dSP;	595	dSP;
496	LOGOP myop;	596	LOGOP myop;
497		597
498	/* I have no idea why this is needed, but it is */
499	PUSHMARK (SP);
500
501	SvREFCNT_dec (GvAV (PL_defgv));	598	SvREFCNT_dec (GvAV (PL_defgv));
502	GvAV (PL_defgv) = coro->args; coro->args = 0;	599	GvAV (PL_defgv) = coro->args; coro->args = 0;
503		600
504	Zero (&myop, 1, LOGOP);	601	Zero (&myop, 1, LOGOP);
505	myop.op_next = Nullop;	602	myop.op_next = Nullop;
506	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID;
507		604
		605	PUSHMARK (SP);
		606	XPUSHs (av_shift (GvAV (PL_defgv)));
		607	PUTBACK;
508	PL_op = (OP *)&myop;	608	PL_op = (OP *)&myop;
509
510	PUSHMARK (SP);
511	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
512	PUTBACK;
513	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	609	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
514	SPAGAIN;	610	SPAGAIN;
515
516	ENTER; /* necessary e.g. for dounwind */
517	}	611	}
518	}
519		612
		613	ENTER; /* necessary e.g. for dounwind */
		614	}
		615
520	static void	616	static void
521	free_coro_mortal ()	617	free_coro_mortal (pTHX)
522	{	618	{
523	if (coro_mortal)	619	if (coro_mortal)
524	{	620	{
525	SvREFCNT_dec (coro_mortal);	621	SvREFCNT_dec (coro_mortal);
526	coro_mortal = 0;	622	coro_mortal = 0;
527	}	623	}
528	}	624	}
529		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 */
530	static void NOINLINE	629	static void NOINLINE
531	prepare_cctx (coro_cctx *cctx)	630	prepare_cctx (pTHX_ coro_cctx *cctx)
532	{	631	{
533	dSP;	632	dSP;
534	LOGOP myop;	633	LOGOP myop;
535		634
536	Zero (&myop, 1, LOGOP);	635	Zero (&myop, 1, LOGOP);
537	myop.op_next = PL_op;	636	myop.op_next = PL_op;
538	myop.op_flags = OPf_WANT_VOID;	637	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
539
540	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
541		638
542	PUSHMARK (SP);	639	PUSHMARK (SP);
		640	EXTEND (SP, 2);
		641	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
543	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	642	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
544	PUTBACK;	643	PUTBACK;
		644	PL_op = (OP *)&myop;
545	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
546	SPAGAIN;	646	SPAGAIN;
547	}	647	}
548		648
		649	/*
		650	* this is a _very_ stripped down perl interpreter ;)
		651	*/
549	static void	652	static void
550	coro_run (void *arg)	653	coro_run (void *arg)
551	{	654	{
		655	dTHX;
		656
552	/* coro_run is the alternative epilogue of transfer() */	657	/* coro_run is the alternative tail of transfer(), so unlock here. */
553	UNLOCK;	658	UNLOCK;
554		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
555	/*	669	/*
556	* 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
557	*/	675	*/
558	PL_top_env = &PL_start_env;	676	PL_top_env = main_top_env;
559		677	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
560	/* inject call to cctx_init */
561	prepare_cctx ((coro_cctx *)arg);
562
563	/* somebody will hit me for both perl_run and PL_restartop */
564	perl_run (PL_curinterp);
565
566	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
567	abort ();
568	}	678	}
569		679
570	static coro_cctx *	680	static coro_cctx *
571	cctx_new ()	681	cctx_new ()
572	{	682	{
573	coro_cctx *cctx;	683	coro_cctx *cctx;
		684	void *stack_start;
		685	size_t stack_size;
574		686
575	++cctx_count;	687	++cctx_count;
576		688
577	New (0, cctx, 1, coro_cctx);	689	Newz (0, cctx, 1, coro_cctx);
578		690
579	#if HAVE_MMAP	691	#if HAVE_MMAP
580		692
581	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	693	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
582	/* mmap suppsedly does allocate-on-write for us */	694	/* mmap supposedly does allocate-on-write for us */
583	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);
584		696
585	if (cctx->sptr == (void *)-1)	697	if (cctx->sptr != (void *)-1)
586	{
587	perror ("FATAL: unable to mmap stack for coroutine");
588	_exit (EXIT_FAILURE);
589	}	698	{
590
591	# if STACKGUARD	699	# if CORO_STACKGUARD
592	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	700	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
593	# 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);
594		711
595	#else
596
597	cctx->ssize = STACKSIZE * (long)sizeof (long);
598	New (0, cctx->sptr, STACKSIZE, long);
599
600	if (!cctx->sptr)	712	if (!cctx->sptr)
601	{	713	{
602	perror ("FATAL: unable to malloc stack for coroutine");	714	perror ("FATAL: unable to allocate stack for coroutine");
603	_exit (EXIT_FAILURE);	715	_exit (EXIT_FAILURE);
604	}	716	}
605		717
606	#endif	718	stack_start = cctx->sptr;
		719	stack_size = cctx->ssize;
		720	}
607		721
608	#if USE_VALGRIND	722	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
609	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
610	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
611	cctx->ssize + (char *)cctx->sptr
612	);
613	#endif
614
615	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);
616		724
617	return cctx;	725	return cctx;
618	}	726	}
619		727
620	static void	728	static void
…		…
623	if (!cctx)	731	if (!cctx)
624	return;	732	return;
625		733
626	--cctx_count;	734	--cctx_count;
627		735
628	#if USE_VALGRIND	736	#if CORO_USE_VALGRIND
629	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	737	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
630	#endif	738	#endif
631		739
632	#if HAVE_MMAP	740	#if HAVE_MMAP
		741	if (cctx->mapped)
633	munmap (cctx->sptr, cctx->ssize);	742	munmap (cctx->sptr, cctx->ssize);
634	#else	743	else
		744	#endif
635	Safefree (cctx->sptr);	745	Safefree (cctx->sptr);
636	#endif
637		746
638	Safefree (cctx);	747	Safefree (cctx);
639	}	748	}
640		749
641	static coro_cctx *	750	static coro_cctx *
642	cctx_get ()	751	cctx_get (pTHX)
643	{	752	{
644	coro_cctx *cctx;
645
646	if (cctx_first)	753	while (cctx_first)
647	{	754	{
648	cctx = cctx_first;	755	coro_cctx *cctx = cctx_first;
649	cctx_first = cctx->next;	756	cctx_first = cctx->next;
650	--cctx_idle;	757	--cctx_idle;
		758
		759	if (cctx->ssize >= coro_stacksize)
		760	return cctx;
		761
		762	cctx_destroy (cctx);
651	}	763	}
652	else	764
653	{
654	cctx = cctx_new ();
655	PL_op = PL_op->op_next;	765	PL_op = PL_op->op_next;
656	}
657
658	return cctx;	766	return cctx_new ();
659	}	767	}
660		768
661	static void	769	static void
662	cctx_put (coro_cctx *cctx)	770	cctx_put (coro_cctx *cctx)
663	{	771	{
…		…
675	++cctx_idle;	783	++cctx_idle;
676	cctx->next = cctx_first;	784	cctx->next = cctx_first;
677	cctx_first = cctx;	785	cctx_first = cctx;
678	}	786	}
679		787
		788	/** coroutine switching *****************************************************/
		789
680	/* never call directly, always through the coro_state_transfer global variable */	790	/* never call directly, always through the coro_state_transfer global variable */
681	static void NOINLINE	791	static void NOINLINE
682	transfer (struct coro *prev, struct coro *next, int flags)	792	transfer (pTHX_ struct coro *prev, struct coro *next)
683	{	793	{
684	dSTACKLEVEL;	794	dSTACKLEVEL;
685		795
686	/* sometimes transfer is only called to set idle_sp */	796	/* sometimes transfer is only called to set idle_sp */
687	if (flags == TRANSFER_SET_STACKLEVEL)	797	if (!next)
		798	{
688	((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	}
689	else if (prev != next)	802	else if (prev != next)
690	{	803	{
691	coro_cctx *prev__cctx;	804	coro_cctx *prev__cctx;
692		805
693	if (!prev->cctx)	806	if (prev->flags & CF_NEW)
694	{	807	{
695	/* create a new empty context */	808	/* create a new empty context */
696	Newz (0, prev->cctx, 1, coro_cctx);	809	Newz (0, prev->cctx, 1, coro_cctx);
697	prev->cctx->inuse = 1;	810	prev->cctx->inuse = 1;
		811	prev->flags &= ~CF_NEW;
698	prev->flags |= CF_RUNNING;	812	prev->flags |= CF_RUNNING;
699	}	813	}
700		814
		815	/*TODO: must not croak here */
701	if (!prev->flags & CF_RUNNING)	816	if (!prev->flags & CF_RUNNING)
702	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");
703		818
704	if (next->flags & CF_RUNNING)	819	if (next->flags & CF_RUNNING)
705	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");
706		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
707	prev->flags &= ~CF_RUNNING;	825	prev->flags &= ~CF_RUNNING;
708	next->flags |= CF_RUNNING;	826	next->flags |= CF_RUNNING;
709		827
710	LOCK;	828	LOCK;
711		829
712	if (next->mainstack)	830	if (next->flags & CF_NEW)
713	{	831	{
714	/* coroutine already started */	832	/* need to start coroutine */
715	SAVE (prev, flags);	833	next->flags &= ~CF_NEW;
716	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);
717	}	840	}
718	else	841	else
719	{	842	{
720	/* need to start coroutine */	843	/* coroutine already started */
721	/* first get rid of the old state */	844	save_perl (aTHX_ prev);
722	SAVE (prev, -1);	845	load_perl (aTHX_ next);
723	/* setup coroutine call */
724	setup_coro (next);
725	/* need a new stack */
726	assert (!next->stack);
727	}	846	}
728		847
729	prev__cctx = prev->cctx;	848	prev__cctx = prev->cctx;
730		849
731	/* possibly "free" the cctx */	850	/* possibly "free" the cctx */
732	if (prev__cctx->idle_sp == STACKLEVEL)	851	if (prev__cctx->idle_sp == STACKLEVEL)
733	{	852	{
734	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	853	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
735	assert (PL_top_env == prev__cctx->top_env);	854	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		855
		856	prev->cctx = 0;
736		857
737	cctx_put (prev__cctx);	858	cctx_put (prev__cctx);
738	prev->cctx = 0;	859	prev__cctx->inuse = 0;
739	}	860	}
740		861
741	if (!next->cctx)	862	if (!next->cctx)
		863	{
742	next->cctx = cctx_get ();	864	next->cctx = cctx_get (aTHX);
		865	assert (!next->cctx->inuse);
		866	next->cctx->inuse = 1;
		867	}
743		868
744	if (prev__cctx != next->cctx)	869	if (prev__cctx != next->cctx)
745	{	870	{
746	assert ( prev__cctx->inuse);
747	assert (!next->cctx->inuse);
748
749	prev__cctx->inuse = 0;
750	next->cctx->inuse = 1;
751
752	prev__cctx->top_env = PL_top_env;	871	prev__cctx->top_env = PL_top_env;
753	PL_top_env = next->cctx->top_env;	872	PL_top_env = next->cctx->top_env;
754	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	873	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
755	}	874	}
756		875
757	free_coro_mortal ();	876	free_coro_mortal (aTHX);
758
759	UNLOCK;	877	UNLOCK;
760	}	878	}
761	}	879	}
762		880
763	struct transfer_args	881	struct transfer_args
764	{	882	{
765	struct coro *prev, *next;	883	struct coro *prev, *next;
766	int flags;
767	};	884	};
768		885
769	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	886	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
770		887
		888	/** high level stuff ********************************************************/
		889
771	static void	890	static int
772	coro_state_destroy (struct coro *coro)	891	coro_state_destroy (pTHX_ struct coro *coro)
773	{	892	{
774	if (coro->refcnt--)	893	if (coro->flags & CF_DESTROYED)
775	return;	894	return 0;
776		895
		896	coro->flags |= CF_DESTROYED;
		897
777	if (coro->flags & CF_RUNNING)	898	if (coro->flags & CF_READY)
778	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 */
779		908
780	if (coro->mainstack && coro->mainstack != main_mainstack)	909	if (coro->mainstack && coro->mainstack != main_mainstack)
781	{	910	{
782	struct coro temp;	911	struct coro temp;
783		912
784	SAVE ((&temp), TRANSFER_SAVE_ALL);	913	assert (!(coro->flags & CF_RUNNING));
785	LOAD (coro);
786		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
787	coro_destroy_stacks ();	924	coro_destroy_stacks (aTHX);
788		925
789	LOAD ((&temp)); /* this will get rid of defsv etc.. */	926	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
790		927
791	coro->mainstack = 0;	928	coro->mainstack = 0;
792	}	929	}
793		930
794	cctx_destroy (coro->cctx);	931	cctx_destroy (coro->cctx);
795	SvREFCNT_dec (coro->args);	932	SvREFCNT_dec (coro->args);
796	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;
797	}	939	}
798		940
799	static int	941	static int
800	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	942	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
801	{	943	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	944	struct coro *coro = (struct coro *)mg->mg_ptr;
803	mg->mg_ptr = 0;	945	mg->mg_ptr = 0;
804		946
		947	coro->hv = 0;
		948
		949	if (--coro->refcnt < 0)
		950	{
805	coro_state_destroy (coro);	951	coro_state_destroy (aTHX_ coro);
		952	Safefree (coro);
		953	}
806		954
807	return 0;	955	return 0;
808	}	956	}
809		957
810	static int	958	static int
…		…
817	return 0;	965	return 0;
818	}	966	}
819		967
820	static MGVTBL coro_state_vtbl = {	968	static MGVTBL coro_state_vtbl = {
821	0, 0, 0, 0,	969	0, 0, 0, 0,
822	coro_state_clear,	970	coro_state_free,
823	0,	971	0,
824	#ifdef MGf_DUP	972	#ifdef MGf_DUP
825	coro_state_dup,	973	coro_state_dup,
826	#else	974	#else
827	# define MGf_DUP 0	975	# define MGf_DUP 0
828	#endif	976	#endif
829	};	977	};
830		978
831	static struct coro *	979	static struct coro *
832	SvSTATE (SV *coro)	980	SvSTATE_ (pTHX_ SV *coro)
833	{	981	{
834	HV *stash;	982	HV *stash;
835	MAGIC *mg;	983	MAGIC *mg;
836		984
837	if (SvROK (coro))	985	if (SvROK (coro))
…		…
843	/* very slow, but rare, check */	991	/* very slow, but rare, check */
844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	992	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845	croak ("Coro::State object required");	993	croak ("Coro::State object required");
846	}	994	}
847		995
848	mg = SvMAGIC (coro);	996	mg = CORO_MAGIC (coro);
849	assert (mg->mg_type == PERL_MAGIC_ext);
850	return (struct coro *)mg->mg_ptr;	997	return (struct coro *)mg->mg_ptr;
851	}	998	}
852		999
		1000	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1001
853	static void	1002	static void
854	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)
855	{	1004	{
856	ta->prev = SvSTATE (prev);	1005	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	1006	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;
859	}	1007	}
860		1008
861	static void	1009	static void
862	api_transfer (SV *prev, SV *next, int flags)	1010	api_transfer (SV *prev_sv, SV *next_sv)
863	{	1011	{
864	dTHX;	1012	dTHX;
865	struct transfer_args ta;	1013	struct transfer_args ta;
866		1014
867	prepare_transfer (&ta, prev, next, flags);	1015	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	1016	TRANSFER (ta);
869	}	1017	}
870		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
871	/** Coro ********************************************************************/	1032	/** Coro ********************************************************************/
872		1033
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV *coro_current, *coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	1034	static void
886	coro_enq (SV *coro_sv)	1035	coro_enq (pTHX_ SV *coro_sv)
887	{	1036	{
888	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);
889	coro_nready++;
890	}	1038	}
891		1039
892	static SV *	1040	static SV *
893	coro_deq (int min_prio)	1041	coro_deq (pTHX_ int min_prio)
894	{	1042	{
895	int prio = PRIO_MAX - PRIO_MIN;	1043	int prio = PRIO_MAX - PRIO_MIN;
896		1044
897	min_prio -= PRIO_MIN;	1045	min_prio -= PRIO_MIN;
898	if (min_prio < 0)	1046	if (min_prio < 0)
899	min_prio = 0;	1047	min_prio = 0;
900		1048
901	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1049	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
902	if (AvFILLp (coro_ready [prio]) >= 0)	1050	if (AvFILLp (coro_ready [prio]) >= 0)
903	{
904	coro_nready--;
905	return av_shift (coro_ready [prio]);	1051	return av_shift (coro_ready [prio]);
906	}
907		1052
908	return 0;	1053	return 0;
909	}	1054	}
910		1055
911	static int	1056	static int
912	api_ready (SV *coro_sv)	1057	api_ready (SV *coro_sv)
913	{	1058	{
		1059	dTHX;
914	struct coro *coro;	1060	struct coro *coro;
915		1061
916	if (SvROK (coro_sv))	1062	if (SvROK (coro_sv))
917	coro_sv = SvRV (coro_sv);	1063	coro_sv = SvRV (coro_sv);
918		1064
919	coro = SvSTATE (coro_sv);	1065	coro = SvSTATE (coro_sv);
920		1066
921	if (coro->flags & CF_READY)	1067	if (coro->flags & CF_READY)
922	return 0;	1068	return 0;
923		1069
924	if (coro->flags & CF_RUNNING)
925	croak ("Coro::ready called on currently running coroutine");
926
927	coro->flags |= CF_READY;	1070	coro->flags |= CF_READY;
928		1071
929	LOCK;	1072	LOCK;
930	coro_enq (SvREFCNT_inc (coro_sv));	1073	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1074	++coro_nready;
931	UNLOCK;	1075	UNLOCK;
932		1076
933	return 1;	1077	return 1;
934	}	1078	}
935		1079
936	static int	1080	static int
937	api_is_ready (SV *coro_sv)	1081	api_is_ready (SV *coro_sv)
938	{	1082	{
		1083	dTHX;
939	return !!SvSTATE (coro_sv)->flags & CF_READY;	1084	return !!(SvSTATE (coro_sv)->flags & CF_READY);
940	}	1085	}
941		1086
942	static void	1087	static void
943	prepare_schedule (struct transfer_args *ta)	1088	prepare_schedule (pTHX_ struct transfer_args *ta)
944	{	1089	{
945	SV *current, *prev, *next;	1090	SV *prev_sv, *next_sv;
946
947	current = GvSV (coro_current);
948		1091
949	for (;;)	1092	for (;;)
950	{	1093	{
951	LOCK;	1094	LOCK;
952	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;
953	UNLOCK;	1127	UNLOCK;
954
955	if (next)
956	break;	1128	break;
957
958	{
959	dSP;
960
961	ENTER;
962	SAVETMPS;
963
964	PUSHMARK (SP);
965	PUTBACK;
966	call_sv (GvSV (coro_idle), G_DISCARD);
967
968	FREETMPS;
969	LEAVE;
970	}	1129	}
971	}
972
973	prev = SvRV (current);
974	SvRV (current) = next;
975		1130
976	/* 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
977	LOCK;	1139	LOCK;
978	free_coro_mortal ();	1140	free_coro_mortal (aTHX);
		1141	coro_mortal = prev_sv;
979	UNLOCK;	1142	UNLOCK;
980	coro_mortal = prev;
981
982	ta->prev = SvSTATE (prev);
983	ta->next = SvSTATE (next);
984	ta->flags = TRANSFER_SAVE_ALL;
985
986	ta->next->flags &= ~CF_READY;
987	}	1143	}
988		1144
989	static void	1145	static void
990	prepare_cede (struct transfer_args *ta)	1146	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1147	{
992	api_ready (GvSV (coro_current));	1148	api_ready (coro_current);
993
994	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;
995	}	1164	}
996		1165
997	static void	1166	static void
998	api_schedule (void)	1167	api_schedule (void)
999	{	1168	{
1000	dTHX;	1169	dTHX;
1001	struct transfer_args ta;	1170	struct transfer_args ta;
1002		1171
1003	prepare_schedule (&ta);	1172	prepare_schedule (aTHX_ &ta);
1004	TRANSFER (ta);	1173	TRANSFER (ta);
1005	}	1174	}
1006		1175
1007	static void	1176	static int
1008	api_cede (void)	1177	api_cede (void)
1009	{	1178	{
1010	dTHX;	1179	dTHX;
1011	struct transfer_args ta;	1180	struct transfer_args ta;
1012		1181
1013	prepare_cede (&ta);	1182	prepare_cede (aTHX_ &ta);
		1183
		1184	if (ta.prev != ta.next)
		1185	{
1014	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;
1015	}	1206	}
1016		1207
1017	MODULE = Coro::State PACKAGE = Coro::State	1208	MODULE = Coro::State PACKAGE = Coro::State
1018		1209
1019	PROTOTYPES: DISABLE	1210	PROTOTYPES: DISABLE
…		…
1025	#endif	1216	#endif
1026	BOOT_PAGESIZE;	1217	BOOT_PAGESIZE;
1027		1218
1028	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1219	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029		1220
1030	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1031	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1032	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));
1033		1228
1034	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;
1035		1234
1036	coroapi.ver = CORO_API_VERSION;	1235	coroapi.ver = CORO_API_VERSION;
1037	coroapi.transfer = api_transfer;	1236	coroapi.transfer = api_transfer;
1038		1237
1039	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1238	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1047	HV *hv;	1246	HV *hv;
1048	int i;	1247	int i;
1049		1248
1050	Newz (0, coro, 1, struct coro);	1249	Newz (0, coro, 1, struct coro);
1051	coro->args = newAV ();	1250	coro->args = newAV ();
		1251	coro->save = CORO_SAVE_DEF;
		1252	coro->flags = CF_NEW;
1052		1253
		1254	if (coro_first) coro_first->prev = coro;
		1255	coro->next = coro_first;
		1256	coro_first = coro;
		1257
1053	hv = newHV ();	1258	coro->hv = hv = newHV ();
1054	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;
1055	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1260	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056		1261
1057	for (i = 1; i < items; i++)	1262	for (i = 1; i < items; i++)
1058	av_push (coro->args, newSVsv (ST (i)));	1263	av_push (coro->args, newSVsv (ST (i)));
1059	}	1264	}
1060	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:
1061	RETVAL	1284	RETVAL
1062		1285
1063	void	1286	void
1064	_set_stacklevel (...)	1287	_set_stacklevel (...)
1065	ALIAS:	1288	ALIAS:
1066	Coro::State::transfer = 1	1289	Coro::State::transfer = 1
1067	Coro::schedule = 2	1290	Coro::schedule = 2
1068	Coro::cede = 3	1291	Coro::cede = 3
1069	Coro::Cont::yield = 4	1292	Coro::cede_notself = 4
1070	CODE:	1293	CODE:
1071	{	1294	{
1072	struct transfer_args ta;	1295	struct transfer_args ta;
1073		1296
1074	switch (ix)	1297	switch (ix)
1075	{	1298	{
1076	case 0:	1299	case 0:
1077	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1300	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1078	ta.next = 0;	1301	ta.next = 0;
1079	ta.flags = TRANSFER_SET_STACKLEVEL;
1080	break;	1302	break;
1081		1303
1082	case 1:	1304	case 1:
1083	if (items != 3)	1305	if (items != 2)
1084	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);
1085		1307
1086	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1308	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1087	break;	1309	break;
1088		1310
1089	case 2:	1311	case 2:
1090	prepare_schedule (&ta);	1312	prepare_schedule (aTHX_ &ta);
1091	break;	1313	break;
1092		1314
1093	case 3:	1315	case 3:
1094	prepare_cede (&ta);	1316	prepare_cede (aTHX_ &ta);
1095	break;	1317	break;
1096		1318
1097	case 4:	1319	case 4:
1098	{	1320	if (!prepare_cede_notself (aTHX_ &ta))
1099	SV *yieldstack;	1321	XSRETURN_EMPTY;
1100	SV *sv;
1101	AV *defav = GvAV (PL_defgv);
1102		1322
1103	yieldstack = *hv_fetch (
1104	(HV *)SvRV (GvSV (coro_current)),
1105	"yieldstack", sizeof ("yieldstack") - 1,
1106	0
1107	);
1108
1109	/* set up @_ -- ugly */
1110	av_clear (defav);
1111	av_fill (defav, items - 1);
1112	while (items--)
1113	av_store (defav, items, SvREFCNT_inc (ST(items)));
1114
1115	sv = av_pop ((AV *)SvRV (yieldstack));
1116	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1117	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1118	ta.flags = 0;
1119	SvREFCNT_dec (sv);
1120	}
1121	break;	1323	break;
1122
1123	}	1324	}
1124		1325
		1326	BARRIER;
1125	TRANSFER (ta);	1327	TRANSFER (ta);
1126	}
1127		1328
1128	void	1329	if (GIMME_V != G_VOID && ta.next != ta.prev)
1129	_clone_state_from (SV *dst, SV *src)	1330	XSRETURN_YES;
		1331	}
		1332
		1333	bool
		1334	_destroy (SV *coro_sv)
1130	CODE:	1335	CODE:
1131	{	1336	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1132	struct coro *coro_src = SvSTATE (src);	1337	OUTPUT:
1133		1338	RETVAL
1134	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1135
1136	++coro_src->refcnt;
1137	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1138	}
1139		1339
1140	void	1340	void
1141	_exit (code)	1341	_exit (code)
1142	int code	1342	int code
1143	PROTOTYPE: $	1343	PROTOTYPE: $
1144	CODE:	1344	CODE:
1145	_exit (code);	1345	_exit (code);
1146		1346
1147	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
1148	cctx_count ()	1357	cctx_count ()
1149	CODE:	1358	CODE:
1150	RETVAL = cctx_count;	1359	RETVAL = cctx_count;
1151	OUTPUT:	1360	OUTPUT:
1152	RETVAL	1361	RETVAL
…		…
1156	CODE:	1365	CODE:
1157	RETVAL = cctx_idle;	1366	RETVAL = cctx_idle;
1158	OUTPUT:	1367	OUTPUT:
1159	RETVAL	1368	RETVAL
1160		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
1161	MODULE = Coro::State PACKAGE = Coro	1439	MODULE = Coro::State PACKAGE = Coro
1162		1440
1163	BOOT:	1441	BOOT:
1164	{	1442	{
1165	int i;	1443	int i;
…		…
1171	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1449	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1172	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1450	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1173	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1451	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1174	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1452	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1175		1453
1176	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1454	coro_current = get_sv ("Coro::current", FALSE);
1177	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1455	SvREADONLY_on (coro_current);
1178		1456
1179	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1457	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1180	coro_ready[i] = newAV ();	1458	coro_ready[i] = newAV ();
1181		1459
1182	{	1460	{
1183	SV *sv = perl_get_sv("Coro::API", 1);	1461	SV *sv = perl_get_sv("Coro::API", 1);
1184		1462
1185	coroapi.schedule = api_schedule;	1463	coroapi.schedule = api_schedule;
		1464	coroapi.save = api_save;
1186	coroapi.cede = api_cede;	1465	coroapi.cede = api_cede;
		1466	coroapi.cede_notself = api_cede_notself;
1187	coroapi.ready = api_ready;	1467	coroapi.ready = api_ready;
1188	coroapi.is_ready = api_is_ready;	1468	coroapi.is_ready = api_is_ready;
1189	coroapi.nready = &coro_nready;	1469	coroapi.nready = &coro_nready;
1190	coroapi.current = coro_current;	1470	coroapi.current = coro_current;
1191		1471
1192	GCoroAPI = &coroapi;	1472	GCoroAPI = &coroapi;
1193	sv_setiv (sv, (IV)&coroapi);	1473	sv_setiv (sv, (IV)&coroapi);
1194	SvREADONLY_on (sv);	1474	SvREADONLY_on (sv);
1195	}	1475	}
1196	}	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)));
1197		1484
1198	int	1485	int
1199	prio (Coro::State coro, int newprio = 0)	1486	prio (Coro::State coro, int newprio = 0)
1200	ALIAS:	1487	ALIAS:
1201	nice = 1	1488	nice = 1
…		…
1204	RETVAL = coro->prio;	1491	RETVAL = coro->prio;
1205		1492
1206	if (items > 1)	1493	if (items > 1)
1207	{	1494	{
1208	if (ix)	1495	if (ix)
1209	newprio += coro->prio;	1496	newprio = coro->prio - newprio;
1210		1497
1211	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1498	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1212	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1499	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1213		1500
1214	coro->prio = newprio;	1501	coro->prio = newprio;
1215	}	1502	}
1216	}	1503	}
		1504	OUTPUT:
		1505	RETVAL
1217		1506
1218	SV *	1507	SV *
1219	ready (SV *self)	1508	ready (SV *self)
1220	PROTOTYPE: $	1509	PROTOTYPE: $
1221	CODE:	1510	CODE:
1222	RETVAL = boolSV (api_ready (self));	1511	RETVAL = boolSV (api_ready (self));
1223	OUTPUT:	1512	OUTPUT:
1224	RETVAL	1513	RETVAL
1225		1514
1226	SV *
1227	is_ready (SV *self)
1228	PROTOTYPE: $
1229	CODE:
1230	RETVAL = boolSV (api_is_ready (self));
1231	OUTPUT:
1232	RETVAL
1233
1234	int	1515	int
1235	nready (...)	1516	nready (...)
1236	PROTOTYPE:	1517	PROTOTYPE:
1237	CODE:	1518	CODE:
1238	RETVAL = coro_nready;	1519	RETVAL = coro_nready;
…		…
1243		1524
1244	SV *	1525	SV *
1245	_get_state ()	1526	_get_state ()
1246	CODE:	1527	CODE:
1247	{	1528	{
1248	struct {	1529	struct io_state *data;
1249	int errorno;
1250	int laststype;
1251	int laststatval;
1252	Stat_t statcache;
1253	} data;
1254		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
1255	data.errorno = errno;	1536	data->errorno = errno;
1256	data.laststype = PL_laststype;	1537	data->laststype = PL_laststype;
1257	data.laststatval = PL_laststatval;	1538	data->laststatval = PL_laststatval;
1258	data.statcache = PL_statcache;	1539	data->statcache = PL_statcache;
1259
1260	RETVAL = newSVpvn ((char *)&data, sizeof data);
1261	}	1540	}
1262	OUTPUT:	1541	OUTPUT:
1263	RETVAL	1542	RETVAL
1264		1543
1265	void	1544	void
1266	_set_state (char *data_)	1545	_set_state (char *data_)
1267	PROTOTYPE: $	1546	PROTOTYPE: $
1268	CODE:	1547	CODE:
1269	{	1548	{
1270	struct {	1549	struct io_state *data = (void *)data_;
1271	int errorno;
1272	int laststype;
1273	int laststatval;
1274	Stat_t statcache;
1275	} *data = (void *)data_;
1276		1550
1277	errno = data->errorno;	1551	errno = data->errorno;
1278	PL_laststype = data->laststype;	1552	PL_laststype = data->laststype;
1279	PL_laststatval = data->laststatval;	1553	PL_laststatval = data->laststatval;
1280	PL_statcache = data->statcache;	1554	PL_statcache = data->statcache;
1281	}	1555	}
		1556

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