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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.116 by root, Fri Dec 1 14:01:43 2006 UTC vs.
Revision 1.152 by root, Thu Sep 20 12:02:25 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 *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(128, 1024/sizeof(PERL_CONTEXT));	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
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 */
…		…
425	New(54,PL_retstack,16,OP*);	491	New(54,PL_retstack,16,OP*);
426	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
427	PL_retstack_max = 16;	493	PL_retstack_max = 16;
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	rss += sizeof (coro->curstackinfo);
		553	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		554	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		555
		556	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		557
		558	rss += coro->tmps_max * sizeof (SV *);
		559
		560	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		561
		562	rss += coro->scopestack_max * sizeof (I32);
		563
		564	rss += coro->savestack_max * sizeof (ANY);
		565
		566	#if !PERL_VERSION_ATLEAST (5,9,0)
		567	rss += coro->retstack_max * sizeof (OP *);
		568	#endif
		569	}
		570
		571	return rss;
		572	}
		573
		574	/** coroutine stack handling ************************************************/
		575
481	static void	576	static void
482	setup_coro (struct coro *coro)	577	setup_coro (pTHX_ struct coro *coro)
483	{	578	{
484	/*	579	/*
485	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
486	*/	581	*/
487
488	coro_init_stacks ();	582	coro_init_stacks (aTHX);
489		583
		584	PL_curcop = &PL_compiling;
		585	PL_in_eval = EVAL_NULL;
490	PL_curcop = 0;	586	PL_comppad = 0;
491	PL_in_eval = 0;
492	PL_curpm = 0;	587	PL_curpm = 0;
		588	PL_localizing = 0;
		589	PL_dirty = 0;
		590	PL_restartop = 0;
493		591
494	{	592	{
495	dSP;	593	dSP;
496	LOGOP myop;	594	LOGOP myop;
497		595
498	/* I have no idea why this is needed, but it is */
499	PUSHMARK (SP);
500
501	SvREFCNT_dec (GvAV (PL_defgv));	596	SvREFCNT_dec (GvAV (PL_defgv));
502	GvAV (PL_defgv) = coro->args; coro->args = 0;	597	GvAV (PL_defgv) = coro->args; coro->args = 0;
503		598
504	Zero (&myop, 1, LOGOP);	599	Zero (&myop, 1, LOGOP);
505	myop.op_next = Nullop;	600	myop.op_next = Nullop;
506	myop.op_flags = OPf_WANT_VOID;	601	myop.op_flags = OPf_WANT_VOID;
507		602
		603	PUSHMARK (SP);
		604	XPUSHs (av_shift (GvAV (PL_defgv)));
		605	PUTBACK;
508	PL_op = (OP *)&myop;	606	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);	607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
514	SPAGAIN;	608	SPAGAIN;
515
516	ENTER; /* necessary e.g. for dounwind */
517	}	609	}
518	}
519		610
		611	ENTER; /* necessary e.g. for dounwind */
		612	}
		613
520	static void	614	static void
521	free_coro_mortal ()	615	free_coro_mortal (pTHX)
522	{	616	{
523	if (coro_mortal)	617	if (coro_mortal)
524	{	618	{
525	SvREFCNT_dec (coro_mortal);	619	SvREFCNT_dec (coro_mortal);
526	coro_mortal = 0;	620	coro_mortal = 0;
527	}	621	}
528	}	622	}
529		623
		624	/* inject a fake call to Coro::State::_cctx_init into the execution */
		625	/* _cctx_init should be careful, as it could be called at almost any time */
		626	/* during execution of a perl program */
530	static void NOINLINE	627	static void NOINLINE
531	prepare_cctx (coro_cctx *cctx)	628	prepare_cctx (pTHX_ coro_cctx *cctx)
532	{	629	{
533	dSP;	630	dSP;
534	LOGOP myop;	631	LOGOP myop;
535		632
536	Zero (&myop, 1, LOGOP);	633	Zero (&myop, 1, LOGOP);
537	myop.op_next = PL_op;	634	myop.op_next = PL_op;
538	myop.op_flags = OPf_WANT_VOID;	635	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
539
540	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
541		636
542	PUSHMARK (SP);	637	PUSHMARK (SP);
		638	EXTEND (SP, 2);
		639	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
543	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	640	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
544	PUTBACK;	641	PUTBACK;
		642	PL_op = (OP *)&myop;
545	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
546	SPAGAIN;	644	SPAGAIN;
547	}	645	}
548		646
		647	/*
		648	* this is a _very_ stripped down perl interpreter ;)
		649	*/
549	static void	650	static void
550	coro_run (void *arg)	651	coro_run (void *arg)
551	{	652	{
		653	dTHX;
		654
552	/* coro_run is the alternative epilogue of transfer() */	655	/* coro_run is the alternative tail of transfer(), so unlock here. */
553	UNLOCK;	656	UNLOCK;
554		657
		658	PL_top_env = &PL_start_env;
		659
		660	/* inject a fake subroutine call to cctx_init */
		661	prepare_cctx (aTHX_ (coro_cctx *)arg);
		662
		663	/* somebody or something will hit me for both perl_run and PL_restartop */
		664	PL_restartop = PL_op;
		665	perl_run (PL_curinterp);
		666
555	/*	667	/*
556	* this is a _very_ stripped down perl interpreter ;)	668	* If perl-run returns we assume exit() was being called or the coro
		669	* fell off the end, which seems to be the only valid (non-bug)
		670	* reason for perl_run to return. We try to exit by jumping to the
		671	* bootstrap-time "top" top_env, as we cannot restore the "main"
		672	* coroutine as Coro has no such concept
557	*/	673	*/
558	PL_top_env = &PL_start_env;	674	PL_top_env = main_top_env;
559		675	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	}	676	}
569		677
570	static coro_cctx *	678	static coro_cctx *
571	cctx_new ()	679	cctx_new ()
572	{	680	{
573	coro_cctx *cctx;	681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
574		684
575	++cctx_count;	685	++cctx_count;
576		686
577	New (0, cctx, 1, coro_cctx);	687	Newz (0, cctx, 1, coro_cctx);
578		688
579	#if HAVE_MMAP	689	#if HAVE_MMAP
580		690
581	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
582	/* mmap suppsedly does allocate-on-write for us */	692	/* 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);	693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
584		694
585	if (cctx->sptr == (void *)-1)	695	if (cctx->sptr != (void *)-1)
586	{
587	perror ("FATAL: unable to mmap stack for coroutine");
588	_exit (EXIT_FAILURE);
589	}	696	{
590
591	# if STACKGUARD	697	# if CORO_STACKGUARD
592	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
593	# endif	699	# endif
		700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		702	cctx->mapped = 1;
		703	}
		704	else
		705	#endif
		706	{
		707	cctx->ssize = coro_stacksize * (long)sizeof (long);
		708	New (0, cctx->sptr, coro_stacksize, long);
594		709
595	#else
596
597	cctx->ssize = STACKSIZE * (long)sizeof (long);
598	New (0, cctx->sptr, STACKSIZE, long);
599
600	if (!cctx->sptr)	710	if (!cctx->sptr)
601	{	711	{
602	perror ("FATAL: unable to malloc stack for coroutine");	712	perror ("FATAL: unable to allocate stack for coroutine");
603	_exit (EXIT_FAILURE);	713	_exit (EXIT_FAILURE);
604	}	714	}
605		715
606	#endif	716	stack_start = cctx->sptr;
		717	stack_size = cctx->ssize;
		718	}
607		719
608	#if USE_VALGRIND	720	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);	721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
616		722
617	return cctx;	723	return cctx;
618	}	724	}
619		725
620	static void	726	static void
…		…
623	if (!cctx)	729	if (!cctx)
624	return;	730	return;
625		731
626	--cctx_count;	732	--cctx_count;
627		733
628	#if USE_VALGRIND	734	#if CORO_USE_VALGRIND
629	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
630	#endif	736	#endif
631		737
632	#if HAVE_MMAP	738	#if HAVE_MMAP
		739	if (cctx->mapped)
633	munmap (cctx->sptr, cctx->ssize);	740	munmap (cctx->sptr, cctx->ssize);
634	#else	741	else
		742	#endif
635	Safefree (cctx->sptr);	743	Safefree (cctx->sptr);
636	#endif
637		744
638	Safefree (cctx);	745	Safefree (cctx);
639	}	746	}
640		747
641	static coro_cctx *	748	static coro_cctx *
642	cctx_get ()	749	cctx_get (pTHX)
643	{	750	{
644	coro_cctx *cctx;
645
646	if (cctx_first)	751	while (cctx_first)
647	{	752	{
648	cctx = cctx_first;	753	coro_cctx *cctx = cctx_first;
649	cctx_first = cctx->next;	754	cctx_first = cctx->next;
650	--cctx_idle;	755	--cctx_idle;
		756
		757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
651	}	761	}
652	else	762
653	{
654	cctx = cctx_new ();
655	PL_op = PL_op->op_next;	763	PL_op = PL_op->op_next;
656	}
657
658	return cctx;	764	return cctx_new ();
659	}	765	}
660		766
661	static void	767	static void
662	cctx_put (coro_cctx *cctx)	768	cctx_put (coro_cctx *cctx)
663	{	769	{
…		…
675	++cctx_idle;	781	++cctx_idle;
676	cctx->next = cctx_first;	782	cctx->next = cctx_first;
677	cctx_first = cctx;	783	cctx_first = cctx;
678	}	784	}
679		785
		786	/** coroutine switching *****************************************************/
		787
680	/* never call directly, always through the coro_state_transfer global variable */	788	/* never call directly, always through the coro_state_transfer global variable */
681	static void NOINLINE	789	static void NOINLINE
682	transfer (struct coro *prev, struct coro *next, int flags)	790	transfer (pTHX_ struct coro *prev, struct coro *next)
683	{	791	{
684	dSTACKLEVEL;	792	dSTACKLEVEL;
685		793
686	/* sometimes transfer is only called to set idle_sp */	794	/* sometimes transfer is only called to set idle_sp */
687	if (flags == TRANSFER_SET_STACKLEVEL)	795	if (!next)
		796	{
688	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		798	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		799	}
689	else if (prev != next)	800	else if (prev != next)
690	{	801	{
691	coro_cctx *prev__cctx;	802	coro_cctx *prev__cctx;
692		803
693	if (!prev->cctx)	804	if (prev->flags & CF_NEW)
694	{	805	{
695	/* create a new empty context */	806	/* create a new empty context */
696	Newz (0, prev->cctx, 1, coro_cctx);	807	Newz (0, prev->cctx, 1, coro_cctx);
697	prev->cctx->inuse = 1;	808	prev->cctx->inuse = 1;
		809	prev->flags &= ~CF_NEW;
698	prev->flags |= CF_RUNNING;	810	prev->flags |= CF_RUNNING;
699	}	811	}
700		812
		813	/*TODO: must not croak here */
701	if (!prev->flags & CF_RUNNING)	814	if (!prev->flags & CF_RUNNING)
702	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
703		816
704	if (next->flags & CF_RUNNING)	817	if (next->flags & CF_RUNNING)
705	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
706		819
		820	if (next->flags & CF_DESTROYED)
		821	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		822
707	prev->flags &= ~CF_RUNNING;	823	prev->flags &= ~CF_RUNNING;
708	next->flags |= CF_RUNNING;	824	next->flags |= CF_RUNNING;
709		825
710	LOCK;	826	LOCK;
711		827
712	if (next->mainstack)	828	if (next->flags & CF_NEW)
713	{	829	{
714	/* coroutine already started */	830	/* need to start coroutine */
715	SAVE (prev, flags);	831	next->flags &= ~CF_NEW;
716	LOAD (next);	832	/* first get rid of the old state */
		833	save_perl (aTHX_ prev);
		834	/* setup coroutine call */
		835	setup_coro (aTHX_ next);
		836	/* need a new stack */
		837	assert (!next->cctx);
717	}	838	}
718	else	839	else
719	{	840	{
720	/* need to start coroutine */	841	/* coroutine already started */
721	/* first get rid of the old state */	842	save_perl (aTHX_ prev);
722	SAVE (prev, -1);	843	load_perl (aTHX_ next);
723	/* setup coroutine call */
724	setup_coro (next);
725	/* need a new stack */
726	assert (!next->stack);
727	}	844	}
728		845
729	prev__cctx = prev->cctx;	846	prev__cctx = prev->cctx;
730		847
731	/* possibly "free" the cctx */	848	/* possibly "free" the cctx */
732	if (prev__cctx->idle_sp == STACKLEVEL)	849	if (prev__cctx->idle_sp == STACKLEVEL)
733	{	850	{
734	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
735	assert (PL_top_env == prev__cctx->top_env);	852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		853
		854	prev->cctx = 0;
736		855
737	cctx_put (prev__cctx);	856	cctx_put (prev__cctx);
738	prev->cctx = 0;	857	prev__cctx->inuse = 0;
739	}	858	}
740		859
741	if (!next->cctx)	860	if (!next->cctx)
		861	{
742	next->cctx = cctx_get ();	862	next->cctx = cctx_get (aTHX);
		863	assert (!next->cctx->inuse);
		864	next->cctx->inuse = 1;
		865	}
743		866
744	if (prev__cctx != next->cctx)	867	if (prev__cctx != next->cctx)
745	{	868	{
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;	869	prev__cctx->top_env = PL_top_env;
753	PL_top_env = next->cctx->top_env;	870	PL_top_env = next->cctx->top_env;
754	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
755	}	872	}
756		873
757	free_coro_mortal ();	874	free_coro_mortal (aTHX);
758
759	UNLOCK;	875	UNLOCK;
760	}	876	}
761	}	877	}
762		878
763	struct transfer_args	879	struct transfer_args
764	{	880	{
765	struct coro *prev, *next;	881	struct coro *prev, *next;
766	int flags;
767	};	882	};
768		883
769	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
770		885
		886	/** high level stuff ********************************************************/
		887
771	static void	888	static int
772	coro_state_destroy (struct coro *coro)	889	coro_state_destroy (pTHX_ struct coro *coro)
773	{	890	{
774	if (coro->refcnt--)	891	if (coro->flags & CF_DESTROYED)
775	return;	892	return 0;
776		893
		894	coro->flags |= CF_DESTROYED;
		895
777	if (coro->flags & CF_RUNNING)	896	if (coro->flags & CF_READY)
778	croak ("FATAL: tried to destroy currently running coroutine");	897	{
		898	/* reduce nready, as destroying a ready coro effectively unreadies it */
		899	/* alternative: look through all ready queues and remove the coro */
		900	LOCK;
		901	--coro_nready;
		902	UNLOCK;
		903	}
		904	else
		905	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
779		906
780	if (coro->mainstack && coro->mainstack != main_mainstack)	907	if (coro->mainstack && coro->mainstack != main_mainstack)
781	{	908	{
782	struct coro temp;	909	struct coro temp;
783		910
784	SAVE ((&temp), TRANSFER_SAVE_ALL);	911	assert (!(coro->flags & CF_RUNNING));
785	LOAD (coro);
786		912
		913	Zero (&temp, 1, struct coro);
		914	temp.save = CORO_SAVE_ALL;
		915
		916	if (coro->flags & CF_RUNNING)
		917	croak ("FATAL: tried to destroy currently running coroutine");
		918
		919	save_perl (aTHX_ &temp);
		920	load_perl (aTHX_ coro);
		921
787	coro_destroy_stacks ();	922	coro_destroy_stacks (aTHX);
788		923
789	LOAD ((&temp)); /* this will get rid of defsv etc.. */	924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
790		925
791	coro->mainstack = 0;	926	coro->mainstack = 0;
792	}	927	}
793		928
794	cctx_destroy (coro->cctx);	929	cctx_destroy (coro->cctx);
795	SvREFCNT_dec (coro->args);	930	SvREFCNT_dec (coro->args);
796	Safefree (coro);	931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == first) first = coro->next;
		935
		936	return 1;
797	}	937	}
798		938
799	static int	939	static int
800	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	940	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
801	{	941	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	942	struct coro *coro = (struct coro *)mg->mg_ptr;
803	mg->mg_ptr = 0;	943	mg->mg_ptr = 0;
804		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
805	coro_state_destroy (coro);	949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
806		952
807	return 0;	953	return 0;
808	}	954	}
809		955
810	static int	956	static int
…		…
817	return 0;	963	return 0;
818	}	964	}
819		965
820	static MGVTBL coro_state_vtbl = {	966	static MGVTBL coro_state_vtbl = {
821	0, 0, 0, 0,	967	0, 0, 0, 0,
822	coro_state_clear,	968	coro_state_free,
823	0,	969	0,
824	#ifdef MGf_DUP	970	#ifdef MGf_DUP
825	coro_state_dup,	971	coro_state_dup,
826	#else	972	#else
827	# define MGf_DUP 0	973	# define MGf_DUP 0
828	#endif	974	#endif
829	};	975	};
830		976
831	static struct coro *	977	static struct coro *
832	SvSTATE (SV *coro)	978	SvSTATE_ (pTHX_ SV *coro)
833	{	979	{
834	HV *stash;	980	HV *stash;
835	MAGIC *mg;	981	MAGIC *mg;
836		982
837	if (SvROK (coro))	983	if (SvROK (coro))
…		…
843	/* very slow, but rare, check */	989	/* very slow, but rare, check */
844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845	croak ("Coro::State object required");	991	croak ("Coro::State object required");
846	}	992	}
847		993
848	mg = SvMAGIC (coro);	994	mg = CORO_MAGIC (coro);
849	assert (mg->mg_type == PERL_MAGIC_ext);
850	return (struct coro *)mg->mg_ptr;	995	return (struct coro *)mg->mg_ptr;
851	}	996	}
852		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
853	static void	1000	static void
854	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1001	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
855	{	1002	{
856	ta->prev = SvSTATE (prev);	1003	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	1004	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;
859	}	1005	}
860		1006
861	static void	1007	static void
862	api_transfer (SV *prev, SV *next, int flags)	1008	api_transfer (SV *prev_sv, SV *next_sv)
863	{	1009	{
864	dTHX;	1010	dTHX;
865	struct transfer_args ta;	1011	struct transfer_args ta;
866		1012
867	prepare_transfer (&ta, prev, next, flags);	1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	1014	TRANSFER (ta);
869	}	1015	}
870		1016
		1017	static int
		1018	api_save (SV *coro_sv, int new_save)
		1019	{
		1020	dTHX;
		1021	struct coro *coro = SvSTATE (coro_sv);
		1022	int old_save = coro->save;
		1023
		1024	if (new_save >= 0)
		1025	coro->save = new_save;
		1026
		1027	return old_save;
		1028	}
		1029
871	/** Coro ********************************************************************/	1030	/** Coro ********************************************************************/
872		1031
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	1032	static void
886	coro_enq (SV *coro_sv)	1033	coro_enq (pTHX_ SV *coro_sv)
887	{	1034	{
888	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
889	coro_nready++;
890	}	1036	}
891		1037
892	static SV *	1038	static SV *
893	coro_deq (int min_prio)	1039	coro_deq (pTHX_ int min_prio)
894	{	1040	{
895	int prio = PRIO_MAX - PRIO_MIN;	1041	int prio = PRIO_MAX - PRIO_MIN;
896		1042
897	min_prio -= PRIO_MIN;	1043	min_prio -= PRIO_MIN;
898	if (min_prio < 0)	1044	if (min_prio < 0)
899	min_prio = 0;	1045	min_prio = 0;
900		1046
901	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
902	if (AvFILLp (coro_ready [prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
903	{
904	coro_nready--;
905	return av_shift (coro_ready [prio]);	1049	return av_shift (coro_ready [prio]);
906	}
907		1050
908	return 0;	1051	return 0;
909	}	1052	}
910		1053
911	static int	1054	static int
912	api_ready (SV *coro_sv)	1055	api_ready (SV *coro_sv)
913	{	1056	{
		1057	dTHX;
914	struct coro *coro;	1058	struct coro *coro;
915		1059
916	if (SvROK (coro_sv))	1060	if (SvROK (coro_sv))
917	coro_sv = SvRV (coro_sv);	1061	coro_sv = SvRV (coro_sv);
918		1062
919	coro = SvSTATE (coro_sv);	1063	coro = SvSTATE (coro_sv);
920		1064
921	if (coro->flags & CF_READY)	1065	if (coro->flags & CF_READY)
922	return 0;	1066	return 0;
923		1067
924	if (coro->flags & CF_RUNNING)
925	croak ("Coro::ready called on currently running coroutine");
926
927	coro->flags |= CF_READY;	1068	coro->flags |= CF_READY;
928		1069
929	LOCK;	1070	LOCK;
930	coro_enq (SvREFCNT_inc (coro_sv));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1072	++coro_nready;
931	UNLOCK;	1073	UNLOCK;
932		1074
933	return 1;	1075	return 1;
934	}	1076	}
935		1077
936	static int	1078	static int
937	api_is_ready (SV *coro_sv)	1079	api_is_ready (SV *coro_sv)
938	{	1080	{
		1081	dTHX;
939	return !!SvSTATE (coro_sv)->flags & CF_READY;	1082	return !!(SvSTATE (coro_sv)->flags & CF_READY);
940	}	1083	}
941		1084
942	static void	1085	static void
943	prepare_schedule (struct transfer_args *ta)	1086	prepare_schedule (pTHX_ struct transfer_args *ta)
944	{	1087	{
945	SV *current, *prev, *next;	1088	SV *prev_sv, *next_sv;
946
947	current = GvSV (coro_current);
948		1089
949	for (;;)	1090	for (;;)
950	{	1091	{
951	LOCK;	1092	LOCK;
952	next = coro_deq (PRIO_MIN);	1093	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1094
		1095	/* nothing to schedule: call the idle handler */
		1096	if (!next_sv)
		1097	{
		1098	dSP;
		1099	UNLOCK;
		1100
		1101	ENTER;
		1102	SAVETMPS;
		1103
		1104	PUSHMARK (SP);
		1105	PUTBACK;
		1106	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1107
		1108	FREETMPS;
		1109	LEAVE;
		1110	continue;
		1111	}
		1112
		1113	ta->next = SvSTATE (next_sv);
		1114
		1115	/* cannot transfer to destroyed coros, skip and look for next */
		1116	if (ta->next->flags & CF_DESTROYED)
		1117	{
		1118	UNLOCK;
		1119	SvREFCNT_dec (next_sv);
		1120	/* coro_nready is already taken care of by destroy */
		1121	continue;
		1122	}
		1123
		1124	--coro_nready;
953	UNLOCK;	1125	UNLOCK;
954
955	if (next)
956	break;	1126	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	}	1127	}
971	}
972
973	prev = SvRV (current);
974	SvRV (current) = next;
975		1128
976	/* free this only after the transfer */	1129	/* free this only after the transfer */
		1130	prev_sv = SvRV (coro_current);
		1131	SvRV_set (coro_current, next_sv);
		1132	ta->prev = SvSTATE (prev_sv);
		1133
		1134	assert (ta->next->flags & CF_READY);
		1135	ta->next->flags &= ~CF_READY;
		1136
977	LOCK;	1137	LOCK;
978	free_coro_mortal ();	1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
979	UNLOCK;	1140	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	}	1141	}
988		1142
989	static void	1143	static void
990	prepare_cede (struct transfer_args *ta)	1144	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1145	{
992	api_ready (GvSV (coro_current));	1146	api_ready (coro_current);
993
994	prepare_schedule (ta);	1147	prepare_schedule (aTHX_ ta);
		1148	}
		1149
		1150	static int
		1151	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1152	{
		1153	if (coro_nready)
		1154	{
		1155	SV *prev = SvRV (coro_current);
		1156	prepare_schedule (aTHX_ ta);
		1157	api_ready (prev);
		1158	return 1;
		1159	}
		1160	else
		1161	return 0;
995	}	1162	}
996		1163
997	static void	1164	static void
998	api_schedule (void)	1165	api_schedule (void)
999	{	1166	{
1000	dTHX;	1167	dTHX;
1001	struct transfer_args ta;	1168	struct transfer_args ta;
1002		1169
1003	prepare_schedule (&ta);	1170	prepare_schedule (aTHX_ &ta);
1004	TRANSFER (ta);	1171	TRANSFER (ta);
1005	}	1172	}
1006		1173
1007	static void	1174	static int
1008	api_cede (void)	1175	api_cede (void)
1009	{	1176	{
1010	dTHX;	1177	dTHX;
1011	struct transfer_args ta;	1178	struct transfer_args ta;
1012		1179
1013	prepare_cede (&ta);	1180	prepare_cede (aTHX_ &ta);
		1181
		1182	if (ta.prev != ta.next)
		1183	{
1014	TRANSFER (ta);	1184	TRANSFER (ta);
		1185	return 1;
		1186	}
		1187	else
		1188	return 0;
		1189	}
		1190
		1191	static int
		1192	api_cede_notself (void)
		1193	{
		1194	dTHX;
		1195	struct transfer_args ta;
		1196
		1197	if (prepare_cede_notself (aTHX_ &ta))
		1198	{
		1199	TRANSFER (ta);
		1200	return 1;
		1201	}
		1202	else
		1203	return 0;
1015	}	1204	}
1016		1205
1017	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
1018		1207
1019	PROTOTYPES: DISABLE	1208	PROTOTYPES: DISABLE
…		…
1025	#endif	1214	#endif
1026	BOOT_PAGESIZE;	1215	BOOT_PAGESIZE;
1027		1216
1028	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029		1218
1030	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1031	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1032	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1222	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1033		1226
1034	main_mainstack = PL_mainstack;	1227	main_mainstack = PL_mainstack;
		1228	main_top_env = PL_top_env;
		1229
		1230	while (main_top_env->je_prev)
		1231	main_top_env = main_top_env->je_prev;
1035		1232
1036	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
1037	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
1038		1235
1039	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1047	HV *hv;	1244	HV *hv;
1048	int i;	1245	int i;
1049		1246
1050	Newz (0, coro, 1, struct coro);	1247	Newz (0, coro, 1, struct coro);
1051	coro->args = newAV ();	1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
		1250	coro->flags = CF_NEW;
1052		1251
		1252	if (first) first->prev = coro;
		1253	coro->next = first;
		1254	first = coro;
		1255
1053	hv = newHV ();	1256	coro->hv = hv = newHV ();
1054	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1257	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));	1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056		1259
1057	for (i = 1; i < items; i++)	1260	for (i = 1; i < items; i++)
1058	av_push (coro->args, newSVsv (ST (i)));	1261	av_push (coro->args, newSVsv (ST (i)));
1059	}	1262	}
1060	OUTPUT:	1263	OUTPUT:
		1264	RETVAL
		1265
		1266	int
		1267	save (SV *coro, int new_save = -1)
		1268	CODE:
		1269	RETVAL = api_save (coro, new_save);
		1270	OUTPUT:
		1271	RETVAL
		1272
		1273	int
		1274	save_also (SV *coro_sv, int save_also)
		1275	CODE:
		1276	{
		1277	struct coro *coro = SvSTATE (coro_sv);
		1278	RETVAL = coro->save;
		1279	coro->save |= save_also;
		1280	}
		1281	OUTPUT:
1061	RETVAL	1282	RETVAL
1062		1283
1063	void	1284	void
1064	_set_stacklevel (...)	1285	_set_stacklevel (...)
1065	ALIAS:	1286	ALIAS:
1066	Coro::State::transfer = 1	1287	Coro::State::transfer = 1
1067	Coro::schedule = 2	1288	Coro::schedule = 2
1068	Coro::cede = 3	1289	Coro::cede = 3
1069	Coro::Cont::yield = 4	1290	Coro::cede_notself = 4
1070	CODE:	1291	CODE:
1071	{	1292	{
1072	struct transfer_args ta;	1293	struct transfer_args ta;
1073		1294
1074	switch (ix)	1295	switch (ix)
1075	{	1296	{
1076	case 0:	1297	case 0:
1077	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1078	ta.next = 0;	1299	ta.next = 0;
1079	ta.flags = TRANSFER_SET_STACKLEVEL;
1080	break;	1300	break;
1081		1301
1082	case 1:	1302	case 1:
1083	if (items != 3)	1303	if (items != 2)
1084	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1304	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1085		1305
1086	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1087	break;	1307	break;
1088		1308
1089	case 2:	1309	case 2:
1090	prepare_schedule (&ta);	1310	prepare_schedule (aTHX_ &ta);
1091	break;	1311	break;
1092		1312
1093	case 3:	1313	case 3:
1094	prepare_cede (&ta);	1314	prepare_cede (aTHX_ &ta);
1095	break;	1315	break;
1096		1316
1097	case 4:	1317	case 4:
1098	{	1318	if (!prepare_cede_notself (aTHX_ &ta))
1099	SV *yieldstack;	1319	XSRETURN_EMPTY;
1100	SV *sv;
1101	AV *defav = GvAV (PL_defgv);
1102		1320
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;	1321	break;
1122
1123	}	1322	}
1124		1323
		1324	BARRIER;
1125	TRANSFER (ta);	1325	TRANSFER (ta);
1126	}
1127		1326
1128	void	1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
1129	_clone_state_from (SV *dst, SV *src)	1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
1130	CODE:	1333	CODE:
1131	{	1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1132	struct coro *coro_src = SvSTATE (src);	1335	OUTPUT:
1133		1336	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		1337
1140	void	1338	void
1141	_exit (code)	1339	_exit (code)
1142	int code	1340	int code
1143	PROTOTYPE: $	1341	PROTOTYPE: $
1144	CODE:	1342	CODE:
1145	_exit (code);	1343	_exit (code);
1146		1344
1147	int	1345	int
		1346	cctx_stacksize (int new_stacksize = 0)
		1347	CODE:
		1348	RETVAL = coro_stacksize;
		1349	if (new_stacksize)
		1350	coro_stacksize = new_stacksize;
		1351	OUTPUT:
		1352	RETVAL
		1353
		1354	int
1148	cctx_count ()	1355	cctx_count ()
1149	CODE:	1356	CODE:
1150	RETVAL = cctx_count;	1357	RETVAL = cctx_count;
1151	OUTPUT:	1358	OUTPUT:
1152	RETVAL	1359	RETVAL
…		…
1156	CODE:	1363	CODE:
1157	RETVAL = cctx_idle;	1364	RETVAL = cctx_idle;
1158	OUTPUT:	1365	OUTPUT:
1159	RETVAL	1366	RETVAL
1160		1367
		1368	void
		1369	list ()
		1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = first; coro; coro = coro->next)
		1374	if (coro->hv)
		1375	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1376	}
		1377
		1378	void
		1379	_eval (Coro::State coro, SV *coderef)
		1380	CODE:
		1381	{
		1382	if (coro->mainstack)
		1383	{
		1384	struct coro temp;
		1385	Zero (&temp, 1, struct coro);
		1386	temp.save = CORO_SAVE_ALL;
		1387
		1388	if (!(coro->flags & CF_RUNNING))
		1389	{
		1390	save_perl (aTHX_ &temp);
		1391	load_perl (aTHX_ coro);
		1392	}
		1393
		1394	{
		1395	dSP;
		1396	ENTER;
		1397	SAVETMPS;
		1398	PUSHMARK (SP);
		1399	PUTBACK;
		1400	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1401	SPAGAIN;
		1402	FREETMPS;
		1403	LEAVE;
		1404	PUTBACK;
		1405	}
		1406
		1407	if (!(coro->flags & CF_RUNNING))
		1408	{
		1409	save_perl (aTHX_ coro);
		1410	load_perl (aTHX_ &temp);
		1411	}
		1412	}
		1413	}
		1414
		1415	SV *
		1416	is_ready (Coro::State coro)
		1417	PROTOTYPE: $
		1418	ALIAS:
		1419	is_ready = CF_READY
		1420	is_running = CF_RUNNING
		1421	is_new = CF_NEW
		1422	is_destroyed = CF_DESTROYED
		1423	CODE:
		1424	RETVAL = boolSV (coro->flags & ix);
		1425	OUTPUT:
		1426	RETVAL
		1427
		1428	IV
		1429	rss (Coro::State coro)
		1430	PROTOTYPE: $
		1431	CODE:
		1432	RETVAL = coro_rss (coro);
		1433	OUTPUT:
		1434	RETVAL
		1435
		1436
1161	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1162		1438
1163	BOOT:	1439	BOOT:
1164	{	1440	{
1165	int i;	1441	int i;
…		…
1171	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1172	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1173	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1174	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1175		1451
1176	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1177	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1178		1454
1179	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1180	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1181		1457
1182	{	1458	{
1183	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1184		1460
1185	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
1186	coroapi.cede = api_cede;	1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1187	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
1188	coroapi.is_ready = api_is_ready;	1466	coroapi.is_ready = api_is_ready;
1189	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1190	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1191		1469
1192	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1193	sv_setiv (sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1194	SvREADONLY_on (sv);	1472	SvREADONLY_on (sv);
1195	}	1473	}
1196	}	1474	}
		1475
		1476	void
		1477	_set_current (SV *current)
		1478	PROTOTYPE: $
		1479	CODE:
		1480	SvREFCNT_dec (SvRV (coro_current));
		1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1197		1482
1198	int	1483	int
1199	prio (Coro::State coro, int newprio = 0)	1484	prio (Coro::State coro, int newprio = 0)
1200	ALIAS:	1485	ALIAS:
1201	nice = 1	1486	nice = 1
…		…
1204	RETVAL = coro->prio;	1489	RETVAL = coro->prio;
1205		1490
1206	if (items > 1)	1491	if (items > 1)
1207	{	1492	{
1208	if (ix)	1493	if (ix)
1209	newprio += coro->prio;	1494	newprio = coro->prio - newprio;
1210		1495
1211	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1212	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1213		1498
1214	coro->prio = newprio;	1499	coro->prio = newprio;
1215	}	1500	}
1216	}	1501	}
		1502	OUTPUT:
		1503	RETVAL
1217		1504
1218	SV *	1505	SV *
1219	ready (SV *self)	1506	ready (SV *self)
1220	PROTOTYPE: $	1507	PROTOTYPE: $
1221	CODE:	1508	CODE:
1222	RETVAL = boolSV (api_ready (self));	1509	RETVAL = boolSV (api_ready (self));
1223	OUTPUT:	1510	OUTPUT:
1224	RETVAL	1511	RETVAL
1225		1512
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	1513	int
1235	nready (...)	1514	nready (...)
1236	PROTOTYPE:	1515	PROTOTYPE:
1237	CODE:	1516	CODE:
1238	RETVAL = coro_nready;	1517	RETVAL = coro_nready;
…		…
1243		1522
1244	SV *	1523	SV *
1245	_get_state ()	1524	_get_state ()
1246	CODE:	1525	CODE:
1247	{	1526	{
1248	struct {	1527	struct io_state *data;
1249	int errorno;
1250	int laststype;
1251	int laststatval;
1252	Stat_t statcache;
1253	} data;
1254		1528
		1529	RETVAL = newSV (sizeof (struct io_state));
		1530	data = (struct io_state *)SvPVX (RETVAL);
		1531	SvCUR_set (RETVAL, sizeof (struct io_state));
		1532	SvPOK_only (RETVAL);
		1533
1255	data.errorno = errno;	1534	data->errorno = errno;
1256	data.laststype = PL_laststype;	1535	data->laststype = PL_laststype;
1257	data.laststatval = PL_laststatval;	1536	data->laststatval = PL_laststatval;
1258	data.statcache = PL_statcache;	1537	data->statcache = PL_statcache;
1259
1260	RETVAL = newSVpvn ((char *)&data, sizeof data);
1261	}	1538	}
1262	OUTPUT:	1539	OUTPUT:
1263	RETVAL	1540	RETVAL
1264		1541
1265	void	1542	void
1266	_set_state (char *data_)	1543	_set_state (char *data_)
1267	PROTOTYPE: $	1544	PROTOTYPE: $
1268	CODE:	1545	CODE:
1269	{	1546	{
1270	struct {	1547	struct io_state *data = (void *)data_;
1271	int errorno;
1272	int laststype;
1273	int laststatval;
1274	Stat_t statcache;
1275	} *data = (void *)data_;
1276		1548
1277	errno = data->errorno;	1549	errno = data->errorno;
1278	PL_laststype = data->laststype;	1550	PL_laststype = data->laststype;
1279	PL_laststatval = data->laststatval;	1551	PL_laststatval = data->laststatval;
1280	PL_statcache = data->statcache;	1552	PL_statcache = data->statcache;
1281	}	1553	}
		1554

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