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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
74	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
75	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	95	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
79		98
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		100
82	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	104	#else
85	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
86	#endif	107	#endif
87		108
88	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
89		110
90	#include "CoroAPI.h"	111	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		112
94	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	117	#else
99	# define LOCK (void)0	118	# define LOCK (void)0
100	# define UNLOCK (void)0	119	# define UNLOCK (void)0
101	#endif	120	#endif
102		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
107		137
108	static struct coro_cctx *cctx_first;	138	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	139	static int cctx_count, cctx_idle;
…		…
112	typedef struct coro_cctx {	142	typedef struct coro_cctx {
113	struct coro_cctx *next;	143	struct coro_cctx *next;
114		144
115	/* the stack */	145	/* the stack */
116	void *sptr;	146	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
118		148
119	/* cpu state */	149	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	152	JMPENV *top_env;
122	coro_context cctx;	153	coro_context cctx;
123		154
124	#if USE_VALGRIND	155	#if CORO_USE_VALGRIND
125	int valgrind_id;	156	int valgrind_id;
126	#endif	157	#endif
		158	char inuse, mapped;
127	} coro_cctx;	159	} coro_cctx;
		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		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 */
		166	};
128		167
129	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
130	struct coro {	169	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	171	coro_cctx *cctx;
133		172
134	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
135	AV *args;	174	AV *args;
136	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
137		178
138	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
139	AV *defav;	180	AV *defav; /* @_ */
140	SV *defsv;	181	SV *defsv; /* $_ */
141	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
142		186
143	#define VAR(name,type) type name;	187	#define VAR(name,type) type name;
144	# include "state.h"	188	# include "state.h"
145	#undef VAR	189	#undef VAR
146		190
147	/* coro process data */	191	/* coro process data */
148	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 */
149	};	197	};
150		198
151	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
153		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
154	static AV *	219	static AV *
155	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
156	{	221	{
157	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
158	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
159		224
160	newpadlist = newAV ();	225	newpadlist = newAV ();
…		…
172		237
173	return newpadlist;	238	return newpadlist;
174	}	239	}
175		240
176	static void	241	static void
177	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
178	{	243	{
179	/* may be during global destruction */	244	/* may be during global destruction */
180	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
181	{	246	{
182	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	268	AV *padlist;
204	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
205		270
206	/* casting is fun. */	271	/* casting is fun. */
207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
209		274
210	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
211		276
212	return 0;	277	return 0;
213	}	278	}
…		…
223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
224	: 0	289	: 0
225		290
226	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
227	static void	292	static void
228	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
229	{	294	{
230	MAGIC *mg = CORO_MAGIC (cv);	295	MAGIC *mg = CORO_MAGIC (cv);
231	AV *av;	296	AV *av;
232		297
233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	300	else
236	{	301	{
237	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
243	#else	308	#else
244	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
245	#endif	310	#endif
246	}	311	}
247	}	312	}
248		313
249	static void	314	static void
250	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
251	{	316	{
252	MAGIC *mg = CORO_MAGIC (cv);	317	MAGIC *mg = CORO_MAGIC (cv);
253	AV *av;	318	AV *av;
254		319
255	if (!mg)	320	if (!mg)
…		…
266	av_extend (av, AvMAX (av) + 1);	331	av_extend (av, AvMAX (av) + 1);
267		332
268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	334	}
270		335
		336	/** load & save, init *******************************************************/
		337
271	#define SB do {	338	#define SB do {
272	#define SE } while (0)	339	#define SE } while (0)
273		340
274	#define LOAD(state) load_state((state));
275	#define SAVE(state,flags) save_state((state),(flags));
276
277	#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
278		342
279	static void	343	static void
280	load_state(Coro__State c)	344	load_perl (pTHX_ Coro__State c)
281	{	345	{
282	#define VAR(name,type) PL_ ## name = c->name;	346	#define VAR(name,type) PL_ ## name = c->name;
283	# include "state.h"	347	# include "state.h"
284	#undef VAR	348	#undef VAR
285		349
286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
288	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	}
289		369
290	{	370	{
291	dSP;	371	dSP;
292	CV *cv;	372	CV *cv;
293		373
294	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
295	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
296	{	376	{
297	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
298	CvDEPTH (cv) = PTR2IV (POPs);	378	CvDEPTH (cv) = PTR2IV (POPs);
299	CvPADLIST (cv) = (AV *)POPs;	379	CvPADLIST (cv) = (AV *)POPs;
300	}	380	}
301		381
302	PUTBACK;	382	PUTBACK;
303	}	383	}
304	}	384	}
305		385
306	static void	386	static void
307	save_state(Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
308	{	388	{
309	{	389	{
310	dSP;	390	dSP;
311	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
312	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
315	/*	395	/*
316	* 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
317	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
318	*/	398	*/
319		399
		400	EXTEND (SP, 3 + 1);
320	PUSHs (Nullsv);	401	PUSHs (Nullsv);
321	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
322	for (;;)	403	for (;;)
323	{	404	{
324	while (cxix >= 0)	405	while (cxix >= 0)
325	{	406	{
326	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
327		408
328	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
329	{	410	{
330	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
331		412
332	if (CvDEPTH (cv))	413	if (CvDEPTH (cv))
333	{	414	{
334	EXTEND (SP, 3);	415	EXTEND (SP, 3);
335
336	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
338	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
339		419
340	CvDEPTH (cv) = 0;	420	CvDEPTH (cv) = 0;
341	get_padlist (cv);	421	get_padlist (aTHX_ cv);
342	}	422	}
343	}	423	}
344	#ifdef CXt_FORMAT
345	else if (CxTYPE(cx) == CXt_FORMAT)
346	{
347	/* I never used formats, so how should I know how these are implemented? */
348	/* my bold guess is as a simple, plain sub... */
349	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
350	}
351	#endif
352	}	424	}
353		425
354	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
355	break;	427	break;
356		428
…		…
360	}	432	}
361		433
362	PUTBACK;	434	PUTBACK;
363	}	435	}
364		436
365	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;
366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
367	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;
368		442
369	#define VAR(name,type)c->name = PL_ ## name;	443	#define VAR(name,type)c->name = PL_ ## name;
370	# include "state.h"	444	# include "state.h"
371	#undef VAR	445	#undef VAR
372	}	446	}
…		…
375	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
376	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
377	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
378	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
379	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
380	static void	457	static void
381	coro_init_stacks ()	458	coro_init_stacks (pTHX)
382	{	459	{
383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
384	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
385	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
387		464
388	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
389	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
390	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
391		468
392	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
393	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
394	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
395	PL_tmps_max = 96;	472	PL_tmps_max = 128;
396		473
397	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
398	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
399	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
400		477
401	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
402	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
403	#endif	480	#endif
404		481
405	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
406	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
407	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
408		485
409	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
410	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
411	PL_savestack_max = 96;	488	PL_savestack_max = 64;
412		489
413	#if !PERL_VERSION_ATLEAST (5,9,0)	490	#if !PERL_VERSION_ATLEAST (5,9,0)
414	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
415	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
416	PL_retstack_max = 8;	493	PL_retstack_max = 16;
417	#endif	494	#endif
418	}	495	}
		496	#endif
419		497
420	/*	498	/*
421	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
422	*/	500	*/
423	static void	501	static void
424	coro_destroy_stacks ()	502	coro_destroy_stacks (pTHX)
425	{	503	{
426	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
427	{	505	{
428	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
429	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
430		509
431	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
432	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
433		513
		514	/* unwind all extra stacks */
434	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
435	}	519	}
436		520
437	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
438	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
439		523
440	while (PL_curstackinfo)	524	while (PL_curstackinfo)
441	{	525	{
442	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
443		527
444	{ /*D*//*remove*/
445	dSP;
446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
447	PUTBACK; /* possibly superfluous */
448	}
449
450	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
451	{
452	dounwind (-1);/*D*//*remove*/
453	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
454	}
455		530
456	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
457	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
458	PL_curstackinfo = p;	533	PL_curstackinfo = p;
459	}	534	}
…		…
465	#if !PERL_VERSION_ATLEAST (5,9,0)	540	#if !PERL_VERSION_ATLEAST (5,9,0)
466	Safefree (PL_retstack);	541	Safefree (PL_retstack);
467	#endif	542	#endif
468	}	543	}
469		544
		545	/** coroutine stack handling ************************************************/
		546
470	static void	547	static void
471	setup_coro (struct coro *coro)	548	setup_coro (pTHX_ struct coro *coro)
472	{	549	{
473	/*	550	/*
474	* emulate part of the perl startup here.	551	* emulate part of the perl startup here.
475	*/	552	*/
476
477	coro_init_stacks ();	553	coro_init_stacks (aTHX);
478		554
		555	PL_curcop = &PL_compiling;
		556	PL_in_eval = EVAL_NULL;
479	PL_curcop = 0;	557	PL_comppad = 0;
480	PL_in_eval = 0;
481	PL_curpm = 0;	558	PL_curpm = 0;
		559	PL_localizing = 0;
		560	PL_dirty = 0;
		561	PL_restartop = 0;
482		562
483	{	563	{
484	dSP;	564	dSP;
485	LOGOP myop;	565	LOGOP myop;
486		566
487	/* I have no idea why this is needed, but it is */
488	PUSHMARK (SP);
489
490	SvREFCNT_dec (GvAV (PL_defgv));	567	SvREFCNT_dec (GvAV (PL_defgv));
491	GvAV (PL_defgv) = coro->args; coro->args = 0;	568	GvAV (PL_defgv) = coro->args; coro->args = 0;
492		569
493	Zero (&myop, 1, LOGOP);	570	Zero (&myop, 1, LOGOP);
494	myop.op_next = Nullop;	571	myop.op_next = Nullop;
495	myop.op_flags = OPf_WANT_VOID;	572	myop.op_flags = OPf_WANT_VOID;
496		573
		574	PUSHMARK (SP);
		575	XPUSHs (av_shift (GvAV (PL_defgv)));
		576	PUTBACK;
497	PL_op = (OP *)&myop;	577	PL_op = (OP *)&myop;
498
499	PUSHMARK (SP);
500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
501	PUTBACK;
502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	578	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
503	SPAGAIN;	579	SPAGAIN;
504
505	ENTER; /* necessary e.g. for dounwind */
506	}	580	}
507	}
508		581
		582	ENTER; /* necessary e.g. for dounwind */
		583	}
		584
509	static void	585	static void
510	free_coro_mortal ()	586	free_coro_mortal (pTHX)
511	{	587	{
512	if (coro_mortal)	588	if (coro_mortal)
513	{	589	{
514	SvREFCNT_dec (coro_mortal);	590	SvREFCNT_dec (coro_mortal);
515	coro_mortal = 0;	591	coro_mortal = 0;
516	}	592	}
517	}	593	}
518		594
		595	/* inject a fake call to Coro::State::_cctx_init into the execution */
		596	/* _cctx_init should be careful, as it could be called at almost any time */
		597	/* during execution of a perl program */
519	static void NOINLINE	598	static void NOINLINE
520	prepare_cctx (coro_cctx *cctx)	599	prepare_cctx (pTHX_ coro_cctx *cctx)
521	{	600	{
522	dSP;	601	dSP;
523	LOGOP myop;	602	LOGOP myop;
524		603
525	Zero (&myop, 1, LOGOP);	604	Zero (&myop, 1, LOGOP);
526	myop.op_next = PL_op;	605	myop.op_next = PL_op;
527	myop.op_flags = OPf_WANT_VOID;	606	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
528
529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530		607
531	PUSHMARK (SP);	608	PUSHMARK (SP);
		609	EXTEND (SP, 2);
		610	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	611	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533	PUTBACK;	612	PUTBACK;
		613	PL_op = (OP *)&myop;
534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	614	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535	SPAGAIN;	615	SPAGAIN;
536	}	616	}
537		617
		618	/*
		619	* this is a _very_ stripped down perl interpreter ;)
		620	*/
538	static void	621	static void
539	coro_run (void *arg)	622	coro_run (void *arg)
540	{	623	{
		624	dTHX;
		625
541	/* coro_run is the alternative epilogue of transfer() */	626	/* coro_run is the alternative tail of transfer(), so unlock here. */
542	UNLOCK;	627	UNLOCK;
543		628
		629	PL_top_env = &PL_start_env;
		630
		631	/* inject a fake subroutine call to cctx_init */
		632	prepare_cctx (aTHX_ (coro_cctx *)arg);
		633
		634	/* somebody or something will hit me for both perl_run and PL_restartop */
		635	PL_restartop = PL_op;
		636	perl_run (PL_curinterp);
		637
544	/*	638	/*
545	* this is a _very_ stripped down perl interpreter ;)	639	* If perl-run returns we assume exit() was being called or the coro
		640	* fell off the end, which seems to be the only valid (non-bug)
		641	* reason for perl_run to return. We try to exit by jumping to the
		642	* bootstrap-time "top" top_env, as we cannot restore the "main"
		643	* coroutine as Coro has no such concept
546	*/	644	*/
547	PL_top_env = &PL_start_env;	645	PL_top_env = main_top_env;
548		646	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
549	/* inject call to cctx_init */
550	prepare_cctx ((coro_cctx *)arg);
551
552	/* somebody will hit me for both perl_run and PL_restartop */
553	perl_run (PL_curinterp);
554
555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
556	abort ();
557	}	647	}
558		648
559	static coro_cctx *	649	static coro_cctx *
560	cctx_new ()	650	cctx_new ()
561	{	651	{
562	coro_cctx *cctx;	652	coro_cctx *cctx;
		653	void *stack_start;
		654	size_t stack_size;
563		655
564	++cctx_count;	656	++cctx_count;
565		657
566	New (0, cctx, 1, coro_cctx);	658	Newz (0, cctx, 1, coro_cctx);
567		659
568	#if HAVE_MMAP	660	#if HAVE_MMAP
569		661
570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	662	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
571	/* mmap suppsedly does allocate-on-write for us */	663	/* mmap supposedly does allocate-on-write for us */
572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	664	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
573		665
574	if (cctx->sptr == (void *)-1)	666	if (cctx->sptr != (void *)-1)
575	{
576	perror ("FATAL: unable to mmap stack for coroutine");
577	_exit (EXIT_FAILURE);
578	}	667	{
579
580	# if STACKGUARD	668	# if CORO_STACKGUARD
581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	669	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
582	# endif	670	# endif
		671	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		672	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		673	cctx->mapped = 1;
		674	}
		675	else
		676	#endif
		677	{
		678	cctx->ssize = coro_stacksize * (long)sizeof (long);
		679	New (0, cctx->sptr, coro_stacksize, long);
583		680
584	#else
585
586	cctx->ssize = STACKSIZE * (long)sizeof (long);
587	New (0, cctx->sptr, STACKSIZE, long);
588
589	if (!cctx->sptr)	681	if (!cctx->sptr)
590	{	682	{
591	perror ("FATAL: unable to malloc stack for coroutine");	683	perror ("FATAL: unable to allocate stack for coroutine");
592	_exit (EXIT_FAILURE);	684	_exit (EXIT_FAILURE);
593	}	685	}
594		686
595	#endif	687	stack_start = cctx->sptr;
		688	stack_size = cctx->ssize;
		689	}
596		690
597	#if USE_VALGRIND	691	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
600	cctx->ssize + (char *)cctx->sptr
601	);
602	#endif
603
604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	692	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
605		693
606	return cctx;	694	return cctx;
607	}	695	}
608		696
609	static void	697	static void
610	cctx_free (coro_cctx *cctx)	698	cctx_destroy (coro_cctx *cctx)
611	{	699	{
612	if (!cctx)	700	if (!cctx)
613	return;	701	return;
614		702
615	--cctx_count;	703	--cctx_count;
616		704
617	#if USE_VALGRIND	705	#if CORO_USE_VALGRIND
618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	706	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619	#endif	707	#endif
620		708
621	#if HAVE_MMAP	709	#if HAVE_MMAP
		710	if (cctx->mapped)
622	munmap (cctx->sptr, cctx->ssize);	711	munmap (cctx->sptr, cctx->ssize);
623	#else	712	else
		713	#endif
624	Safefree (cctx->sptr);	714	Safefree (cctx->sptr);
625	#endif
626		715
627	Safefree (cctx);	716	Safefree (cctx);
628	}	717	}
629		718
630	static coro_cctx *	719	static coro_cctx *
631	cctx_get ()	720	cctx_get (pTHX)
632	{	721	{
633	coro_cctx *cctx;
634
635	if (cctx_first)	722	while (cctx_first)
636	{	723	{
		724	coro_cctx *cctx = cctx_first;
		725	cctx_first = cctx->next;
637	--cctx_idle;	726	--cctx_idle;
638	cctx = cctx_first;	727
639	cctx_first = cctx->next;	728	if (cctx->ssize >= coro_stacksize)
		729	return cctx;
		730
		731	cctx_destroy (cctx);
640	}	732	}
641	else	733
642	{
643	cctx = cctx_new ();
644	PL_op = PL_op->op_next;	734	PL_op = PL_op->op_next;
645	}
646
647	return cctx;	735	return cctx_new ();
648	}	736	}
649		737
650	static void	738	static void
651	cctx_put (coro_cctx *cctx)	739	cctx_put (coro_cctx *cctx)
652	{	740	{
		741	/* free another cctx if overlimit */
		742	if (cctx_idle >= MAX_IDLE_CCTX)
		743	{
		744	coro_cctx *first = cctx_first;
		745	cctx_first = first->next;
		746	--cctx_idle;
		747
		748	assert (!first->inuse);
		749	cctx_destroy (first);
		750	}
		751
653	++cctx_idle;	752	++cctx_idle;
654	cctx->next = cctx_first;	753	cctx->next = cctx_first;
655	cctx_first = cctx;	754	cctx_first = cctx;
656	}	755	}
657		756
		757	/** coroutine switching *****************************************************/
		758
658	/* never call directly, always through the coro_state_transfer global variable */	759	/* never call directly, always through the coro_state_transfer global variable */
659	static void NOINLINE	760	static void NOINLINE
660	transfer (struct coro *prev, struct coro *next, int flags)	761	transfer (pTHX_ struct coro *prev, struct coro *next)
661	{	762	{
662	dSTACKLEVEL;	763	dSTACKLEVEL;
663		764
664	/* sometimes transfer is only called to set idle_sp */	765	/* sometimes transfer is only called to set idle_sp */
665	if (flags == TRANSFER_SET_STACKLEVEL)	766	if (!next)
		767	{
666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	768	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		769	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		770	}
667	else if (prev != next)	771	else if (prev != next)
668	{	772	{
669	coro_cctx *prev__cctx;	773	coro_cctx *prev__cctx;
670		774
		775	if (prev->flags & CF_NEW)
		776	{
		777	/* create a new empty context */
		778	Newz (0, prev->cctx, 1, coro_cctx);
		779	prev->cctx->inuse = 1;
		780	prev->flags &= ~CF_NEW;
		781	prev->flags |= CF_RUNNING;
		782	}
		783
		784	/*TODO: must not croak here */
		785	if (!prev->flags & CF_RUNNING)
		786	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		787
		788	if (next->flags & CF_RUNNING)
		789	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		790
		791	if (next->flags & CF_DESTROYED)
		792	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		793
		794	prev->flags &= ~CF_RUNNING;
		795	next->flags |= CF_RUNNING;
		796
671	LOCK;	797	LOCK;
672		798
673	if (next->mainstack)	799	if (next->flags & CF_NEW)
674	{	800	{
675	/* coroutine already started */	801	/* need to start coroutine */
676	SAVE (prev, flags);	802	next->flags &= ~CF_NEW;
677	LOAD (next);	803	/* first get rid of the old state */
		804	save_perl (aTHX_ prev);
		805	/* setup coroutine call */
		806	setup_coro (aTHX_ next);
		807	/* need a new stack */
		808	assert (!next->cctx);
678	}	809	}
679	else	810	else
680	{	811	{
681	/* need to start coroutine */	812	/* coroutine already started */
682	/* first get rid of the old state */	813	save_perl (aTHX_ prev);
683	SAVE (prev, -1);	814	load_perl (aTHX_ next);
684	/* setup coroutine call */
685	setup_coro (next);
686	/* need a stack */
687	next->cctx = 0;
688	}	815	}
689
690	if (!prev->cctx)
691	/* create a new empty context */
692	Newz (0, prev->cctx, 1, coro_cctx);
693		816
694	prev__cctx = prev->cctx;	817	prev__cctx = prev->cctx;
695		818
696	/* possibly "free" the cctx */	819	/* possibly "free" the cctx */
697	if (prev__cctx->idle_sp == STACKLEVEL)	820	if (prev__cctx->idle_sp == STACKLEVEL)
698	{	821	{
699	assert (PL_top_env == prev__cctx->top_env);//D	822	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		823	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		824
		825	prev->cctx = 0;
		826
700	cctx_put (prev__cctx);	827	cctx_put (prev__cctx);
701	prev->cctx = 0;	828	prev__cctx->inuse = 0;
702	}	829	}
703		830
704	if (!next->cctx)	831	if (!next->cctx)
		832	{
705	next->cctx = cctx_get ();	833	next->cctx = cctx_get (aTHX);
		834	assert (!next->cctx->inuse);
		835	next->cctx->inuse = 1;
		836	}
706		837
707	if (prev__cctx != next->cctx)	838	if (prev__cctx != next->cctx)
708	{	839	{
709	prev__cctx->top_env = PL_top_env;	840	prev__cctx->top_env = PL_top_env;
710	PL_top_env = next->cctx->top_env;	841	PL_top_env = next->cctx->top_env;
711	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	842	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
712	}	843	}
713		844
714	free_coro_mortal ();	845	free_coro_mortal (aTHX);
715
716	UNLOCK;	846	UNLOCK;
717	}	847	}
718	}	848	}
719		849
720	struct transfer_args	850	struct transfer_args
721	{	851	{
722	struct coro *prev, *next;	852	struct coro *prev, *next;
723	int flags;
724	};	853	};
725		854
726	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	855	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
727		856
		857	/** high level stuff ********************************************************/
		858
728	static void	859	static int
729	coro_state_destroy (struct coro *coro)	860	coro_state_destroy (pTHX_ struct coro *coro)
730	{	861	{
731	if (coro->refcnt--)	862	if (coro->flags & CF_DESTROYED)
732	return;	863	return 0;
		864
		865	coro->flags |= CF_DESTROYED;
		866
		867	if (coro->flags & CF_READY)
		868	{
		869	/* reduce nready, as destroying a ready coro effectively unreadies it */
		870	/* alternative: look through all ready queues and remove the coro */
		871	LOCK;
		872	--coro_nready;
		873	UNLOCK;
		874	}
		875	else
		876	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
733		877
734	if (coro->mainstack && coro->mainstack != main_mainstack)	878	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	879	{
736	struct coro temp;	880	struct coro temp;
737		881
738	SAVE ((&temp), TRANSFER_SAVE_ALL);	882	assert (!(coro->flags & CF_RUNNING));
739	LOAD (coro);
740		883
		884	Zero (&temp, 1, struct coro);
		885	temp.save = CORO_SAVE_ALL;
		886
		887	if (coro->flags & CF_RUNNING)
		888	croak ("FATAL: tried to destroy currently running coroutine");
		889
		890	save_perl (aTHX_ &temp);
		891	load_perl (aTHX_ coro);
		892
741	coro_destroy_stacks ();	893	coro_destroy_stacks (aTHX);
742		894
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	895	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
744		896
745	coro->mainstack = 0;	897	coro->mainstack = 0;
746	}	898	}
747		899
748	cctx_free (coro->cctx);	900	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	901	SvREFCNT_dec (coro->args);
750	Safefree (coro);	902
		903	if (coro->next) coro->next->prev = coro->prev;
		904	if (coro->prev) coro->prev->next = coro->next;
		905	if (coro == first) first = coro->next;
		906
		907	return 1;
751	}	908	}
752		909
753	static int	910	static int
754	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	911	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
755	{	912	{
756	struct coro *coro = (struct coro *)mg->mg_ptr;	913	struct coro *coro = (struct coro *)mg->mg_ptr;
757	mg->mg_ptr = 0;	914	mg->mg_ptr = 0;
758		915
		916	coro->hv = 0;
		917
		918	if (--coro->refcnt < 0)
		919	{
759	coro_state_destroy (coro);	920	coro_state_destroy (aTHX_ coro);
		921	Safefree (coro);
		922	}
760		923
761	return 0;	924	return 0;
762	}	925	}
763		926
764	static int	927	static int
…		…
771	return 0;	934	return 0;
772	}	935	}
773		936
774	static MGVTBL coro_state_vtbl = {	937	static MGVTBL coro_state_vtbl = {
775	0, 0, 0, 0,	938	0, 0, 0, 0,
776	coro_state_clear,	939	coro_state_free,
777	0,	940	0,
778	#ifdef MGf_DUP	941	#ifdef MGf_DUP
779	coro_state_dup,	942	coro_state_dup,
780	#else	943	#else
781	# define MGf_DUP 0	944	# define MGf_DUP 0
782	#endif	945	#endif
783	};	946	};
784		947
785	static struct coro *	948	static struct coro *
786	SvSTATE (SV *coro)	949	SvSTATE_ (pTHX_ SV *coro)
787	{	950	{
788	HV *stash;	951	HV *stash;
789	MAGIC *mg;	952	MAGIC *mg;
790		953
791	if (SvROK (coro))	954	if (SvROK (coro))
…		…
797	/* very slow, but rare, check */	960	/* very slow, but rare, check */
798	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	961	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
799	croak ("Coro::State object required");	962	croak ("Coro::State object required");
800	}	963	}
801		964
802	mg = SvMAGIC (coro);	965	mg = CORO_MAGIC (coro);
803	assert (mg->mg_type == PERL_MAGIC_ext);
804	return (struct coro *)mg->mg_ptr;	966	return (struct coro *)mg->mg_ptr;
805	}	967	}
806		968
		969	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		970
807	static void	971	static void
808	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	972	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
809	{	973	{
810	ta->prev = SvSTATE (prev);	974	ta->prev = SvSTATE (prev_sv);
811	ta->next = SvSTATE (next);	975	ta->next = SvSTATE (next_sv);
812	ta->flags = flags;
813	}	976	}
814		977
815	static void	978	static void
816	api_transfer (SV *prev, SV *next, int flags)	979	api_transfer (SV *prev_sv, SV *next_sv)
817	{	980	{
818	dTHX;	981	dTHX;
819	struct transfer_args ta;	982	struct transfer_args ta;
820		983
821	prepare_transfer (&ta, prev, next, flags);	984	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
822	TRANSFER (ta);	985	TRANSFER (ta);
823	}	986	}
824		987
		988	static int
		989	api_save (SV *coro_sv, int new_save)
		990	{
		991	dTHX;
		992	struct coro *coro = SvSTATE (coro_sv);
		993	int old_save = coro->save;
		994
		995	if (new_save >= 0)
		996	coro->save = new_save;
		997
		998	return old_save;
		999	}
		1000
825	/** Coro ********************************************************************/	1001	/** Coro ********************************************************************/
826		1002
827	#define PRIO_MAX 3
828	#define PRIO_HIGH 1
829	#define PRIO_NORMAL 0
830	#define PRIO_LOW -1
831	#define PRIO_IDLE -3
832	#define PRIO_MIN -4
833
834	/* for Coro.pm */
835	static GV *coro_current, *coro_idle;
836	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
837	static int coro_nready;
838
839	static void	1003	static void
840	coro_enq (SV *sv)	1004	coro_enq (pTHX_ SV *coro_sv)
841	{	1005	{
842	int prio;
843
844	if (SvTYPE (sv) != SVt_PVHV)
845	croak ("Coro::ready tried to enqueue something that is not a coroutine");
846
847	prio = SvSTATE (sv)->prio;
848
849	av_push (coro_ready [prio - PRIO_MIN], sv);	1006	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
850	coro_nready++;
851	}	1007	}
852		1008
853	static SV *	1009	static SV *
854	coro_deq (int min_prio)	1010	coro_deq (pTHX_ int min_prio)
855	{	1011	{
856	int prio = PRIO_MAX - PRIO_MIN;	1012	int prio = PRIO_MAX - PRIO_MIN;
857		1013
858	min_prio -= PRIO_MIN;	1014	min_prio -= PRIO_MIN;
859	if (min_prio < 0)	1015	if (min_prio < 0)
860	min_prio = 0;	1016	min_prio = 0;
861		1017
862	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1018	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
863	if (AvFILLp (coro_ready [prio]) >= 0)	1019	if (AvFILLp (coro_ready [prio]) >= 0)
864	{
865	coro_nready--;
866	return av_shift (coro_ready [prio]);	1020	return av_shift (coro_ready [prio]);
867	}
868		1021
869	return 0;	1022	return 0;
870	}	1023	}
871		1024
872	static void	1025	static int
873	api_ready (SV *coro)	1026	api_ready (SV *coro_sv)
874	{	1027	{
875	dTHX;	1028	dTHX;
		1029	struct coro *coro;
876		1030
877	if (SvROK (coro))	1031	if (SvROK (coro_sv))
878	coro = SvRV (coro);	1032	coro_sv = SvRV (coro_sv);
		1033
		1034	coro = SvSTATE (coro_sv);
		1035
		1036	if (coro->flags & CF_READY)
		1037	return 0;
		1038
		1039	coro->flags |= CF_READY;
879		1040
880	LOCK;	1041	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	1042	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1043	++coro_nready;
882	UNLOCK;	1044	UNLOCK;
883	}
884		1045
		1046	return 1;
		1047	}
		1048
885	static void	1049	static int
		1050	api_is_ready (SV *coro_sv)
		1051	{
		1052	dTHX;
		1053	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1054	}
		1055
		1056	static void
886	prepare_schedule (struct transfer_args *ta)	1057	prepare_schedule (pTHX_ struct transfer_args *ta)
887	{	1058	{
888	SV *current, *prev, *next;	1059	SV *prev_sv, *next_sv;
889
890	current = GvSV (coro_current);
891		1060
892	for (;;)	1061	for (;;)
893	{	1062	{
894	LOCK;	1063	LOCK;
895	next = coro_deq (PRIO_MIN);	1064	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1065
		1066	/* nothing to schedule: call the idle handler */
		1067	if (!next_sv)
		1068	{
		1069	dSP;
		1070	UNLOCK;
		1071
		1072	ENTER;
		1073	SAVETMPS;
		1074
		1075	PUSHMARK (SP);
		1076	PUTBACK;
		1077	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1078
		1079	FREETMPS;
		1080	LEAVE;
		1081	continue;
		1082	}
		1083
		1084	ta->next = SvSTATE (next_sv);
		1085
		1086	/* cannot transfer to destroyed coros, skip and look for next */
		1087	if (ta->next->flags & CF_DESTROYED)
		1088	{
		1089	UNLOCK;
		1090	SvREFCNT_dec (next_sv);
		1091	/* coro_nready is already taken care of by destroy */
		1092	continue;
		1093	}
		1094
		1095	--coro_nready;
896	UNLOCK;	1096	UNLOCK;
897
898	if (next)
899	break;	1097	break;
900
901	{
902	dSP;
903
904	ENTER;
905	SAVETMPS;
906
907	PUSHMARK (SP);
908	PUTBACK;
909	call_sv (GvSV (coro_idle), G_DISCARD);
910
911	FREETMPS;
912	LEAVE;
913	}	1098	}
914	}
915
916	prev = SvRV (current);
917	SvRV (current) = next;
918		1099
919	/* free this only after the transfer */	1100	/* free this only after the transfer */
		1101	prev_sv = SvRV (coro_current);
		1102	SvRV_set (coro_current, next_sv);
		1103	ta->prev = SvSTATE (prev_sv);
		1104
		1105	assert (ta->next->flags & CF_READY);
		1106	ta->next->flags &= ~CF_READY;
		1107
920	LOCK;	1108	LOCK;
921	free_coro_mortal ();	1109	free_coro_mortal (aTHX);
		1110	coro_mortal = prev_sv;
922	UNLOCK;	1111	UNLOCK;
923	coro_mortal = prev;
924
925	ta->prev = SvSTATE (prev);
926	ta->next = SvSTATE (next);
927	ta->flags = TRANSFER_SAVE_ALL;
928	}	1112	}
929		1113
930	static void	1114	static void
931	prepare_cede (struct transfer_args *ta)	1115	prepare_cede (pTHX_ struct transfer_args *ta)
932	{	1116	{
933	LOCK;	1117	api_ready (coro_current);
934	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
935	UNLOCK;
936
937	prepare_schedule (ta);	1118	prepare_schedule (aTHX_ ta);
		1119	}
		1120
		1121	static int
		1122	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1123	{
		1124	if (coro_nready)
		1125	{
		1126	SV *prev = SvRV (coro_current);
		1127	prepare_schedule (aTHX_ ta);
		1128	api_ready (prev);
		1129	return 1;
		1130	}
		1131	else
		1132	return 0;
938	}	1133	}
939		1134
940	static void	1135	static void
941	api_schedule (void)	1136	api_schedule (void)
942	{	1137	{
943	dTHX;	1138	dTHX;
944	struct transfer_args ta;	1139	struct transfer_args ta;
945		1140
946	prepare_schedule (&ta);	1141	prepare_schedule (aTHX_ &ta);
947	TRANSFER (ta);	1142	TRANSFER (ta);
948	}	1143	}
949		1144
950	static void	1145	static int
951	api_cede (void)	1146	api_cede (void)
952	{	1147	{
953	dTHX;	1148	dTHX;
954	struct transfer_args ta;	1149	struct transfer_args ta;
955		1150
956	prepare_cede (&ta);	1151	prepare_cede (aTHX_ &ta);
		1152
		1153	if (ta.prev != ta.next)
		1154	{
957	TRANSFER (ta);	1155	TRANSFER (ta);
		1156	return 1;
		1157	}
		1158	else
		1159	return 0;
		1160	}
		1161
		1162	static int
		1163	api_cede_notself (void)
		1164	{
		1165	dTHX;
		1166	struct transfer_args ta;
		1167
		1168	if (prepare_cede_notself (aTHX_ &ta))
		1169	{
		1170	TRANSFER (ta);
		1171	return 1;
		1172	}
		1173	else
		1174	return 0;
958	}	1175	}
959		1176
960	MODULE = Coro::State PACKAGE = Coro::State	1177	MODULE = Coro::State PACKAGE = Coro::State
961		1178
962	PROTOTYPES: DISABLE	1179	PROTOTYPES: DISABLE
…		…
968	#endif	1185	#endif
969	BOOT_PAGESIZE;	1186	BOOT_PAGESIZE;
970		1187
971	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1188	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
972		1189
973	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1190	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
974	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1191	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
975	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1192	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1193	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1194	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1195	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1196	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
976		1197
977	main_mainstack = PL_mainstack;	1198	main_mainstack = PL_mainstack;
		1199	main_top_env = PL_top_env;
		1200
		1201	while (main_top_env->je_prev)
		1202	main_top_env = main_top_env->je_prev;
978		1203
979	coroapi.ver = CORO_API_VERSION;	1204	coroapi.ver = CORO_API_VERSION;
980	coroapi.transfer = api_transfer;	1205	coroapi.transfer = api_transfer;
981		1206
982	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1207	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
990	HV *hv;	1215	HV *hv;
991	int i;	1216	int i;
992		1217
993	Newz (0, coro, 1, struct coro);	1218	Newz (0, coro, 1, struct coro);
994	coro->args = newAV ();	1219	coro->args = newAV ();
		1220	coro->save = CORO_SAVE_DEF;
		1221	coro->flags = CF_NEW;
995		1222
		1223	if (first) first->prev = coro;
		1224	coro->next = first;
		1225	first = coro;
		1226
996	hv = newHV ();	1227	coro->hv = hv = newHV ();
997	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1228	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
998	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1229	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
999		1230
1000	for (i = 1; i < items; i++)	1231	for (i = 1; i < items; i++)
1001	av_push (coro->args, newSVsv (ST (i)));	1232	av_push (coro->args, newSVsv (ST (i)));
1002	}	1233	}
1003	OUTPUT:	1234	OUTPUT:
		1235	RETVAL
		1236
		1237	int
		1238	save (SV *coro, int new_save = -1)
		1239	CODE:
		1240	RETVAL = api_save (coro, new_save);
		1241	OUTPUT:
		1242	RETVAL
		1243
		1244	int
		1245	save_also (SV *coro_sv, int save_also)
		1246	CODE:
		1247	{
		1248	struct coro *coro = SvSTATE (coro_sv);
		1249	RETVAL = coro->save;
		1250	coro->save |= save_also;
		1251	}
		1252	OUTPUT:
1004	RETVAL	1253	RETVAL
1005		1254
1006	void	1255	void
1007	_set_stacklevel (...)	1256	_set_stacklevel (...)
1008	ALIAS:	1257	ALIAS:
1009	Coro::State::transfer = 1	1258	Coro::State::transfer = 1
1010	Coro::schedule = 2	1259	Coro::schedule = 2
1011	Coro::cede = 3	1260	Coro::cede = 3
1012	Coro::Cont::yield = 4	1261	Coro::cede_notself = 4
1013	CODE:	1262	CODE:
1014	{	1263	{
1015	struct transfer_args ta;	1264	struct transfer_args ta;
1016		1265
1017	switch (ix)	1266	switch (ix)
1018	{	1267	{
1019	case 0:	1268	case 0:
1020	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1269	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1021	ta.next = 0;	1270	ta.next = 0;
1022	ta.flags = TRANSFER_SET_STACKLEVEL;
1023	break;	1271	break;
1024		1272
1025	case 1:	1273	case 1:
1026	if (items != 3)	1274	if (items != 2)
1027	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1275	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1028		1276
1029	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1277	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1030	break;	1278	break;
1031		1279
1032	case 2:	1280	case 2:
1033	prepare_schedule (&ta);	1281	prepare_schedule (aTHX_ &ta);
1034	break;	1282	break;
1035		1283
1036	case 3:	1284	case 3:
1037	prepare_cede (&ta);	1285	prepare_cede (aTHX_ &ta);
1038	break;	1286	break;
1039		1287
1040	case 4:	1288	case 4:
1041	{	1289	if (!prepare_cede_notself (aTHX_ &ta))
1042	SV *yieldstack;	1290	XSRETURN_EMPTY;
1043	SV *sv;
1044	AV *defav = GvAV (PL_defgv);
1045		1291
1046	yieldstack = *hv_fetch (
1047	(HV *)SvRV (GvSV (coro_current)),
1048	"yieldstack", sizeof ("yieldstack") - 1,
1049	0
1050	);
1051
1052	/* set up @_ -- ugly */
1053	av_clear (defav);
1054	av_fill (defav, items - 1);
1055	while (items--)
1056	av_store (defav, items, SvREFCNT_inc (ST(items)));
1057
1058	sv = av_pop ((AV *)SvRV (yieldstack));
1059	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1060	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1061	ta.flags = 0;
1062	SvREFCNT_dec (sv);
1063	}
1064	break;	1292	break;
1065
1066	}	1293	}
1067		1294
		1295	BARRIER;
1068	TRANSFER (ta);	1296	TRANSFER (ta);
1069	}
1070		1297
1071	void	1298	if (GIMME_V != G_VOID && ta.next != ta.prev)
1072	_clone_state_from (SV *dst, SV *src)	1299	XSRETURN_YES;
		1300	}
		1301
		1302	bool
		1303	_destroy (SV *coro_sv)
1073	CODE:	1304	CODE:
1074	{	1305	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1075	struct coro *coro_src = SvSTATE (src);	1306	OUTPUT:
1076		1307	RETVAL
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1081	}
1082		1308
1083	void	1309	void
1084	_exit (code)	1310	_exit (code)
1085	int code	1311	int code
1086	PROTOTYPE: $	1312	PROTOTYPE: $
1087	CODE:	1313	CODE:
1088	_exit (code);	1314	_exit (code);
1089		1315
1090	int	1316	int
		1317	cctx_stacksize (int new_stacksize = 0)
		1318	CODE:
		1319	RETVAL = coro_stacksize;
		1320	if (new_stacksize)
		1321	coro_stacksize = new_stacksize;
		1322	OUTPUT:
		1323	RETVAL
		1324
		1325	int
1091	cctx_count ()	1326	cctx_count ()
1092	CODE:	1327	CODE:
1093	RETVAL = cctx_count;	1328	RETVAL = cctx_count;
1094	OUTPUT:	1329	OUTPUT:
1095	RETVAL	1330	RETVAL
…		…
1099	CODE:	1334	CODE:
1100	RETVAL = cctx_idle;	1335	RETVAL = cctx_idle;
1101	OUTPUT:	1336	OUTPUT:
1102	RETVAL	1337	RETVAL
1103		1338
		1339	void
		1340	list ()
		1341	PPCODE:
		1342	{
		1343	struct coro *coro;
		1344	for (coro = first; coro; coro = coro->next)
		1345	if (coro->hv)
		1346	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1347	}
		1348
		1349	void
		1350	_eval (SV *coro_sv, SV *coderef)
		1351	CODE:
		1352	{
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354	if (coro->mainstack)
		1355	{
		1356	struct coro temp;
		1357	Zero (&temp, 1, struct coro);
		1358	temp.save = CORO_SAVE_ALL;
		1359
		1360	if (!(coro->flags & CF_RUNNING))
		1361	{
		1362	save_perl (aTHX_ &temp);
		1363	load_perl (aTHX_ coro);
		1364	}
		1365
		1366	{
		1367	dSP;
		1368	ENTER;
		1369	SAVETMPS;
		1370	PUSHMARK (SP);
		1371	PUTBACK;
		1372	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1373	SPAGAIN;
		1374	FREETMPS;
		1375	LEAVE;
		1376	PUTBACK;
		1377	}
		1378
		1379	if (!(coro->flags & CF_RUNNING))
		1380	{
		1381	save_perl (aTHX_ coro);
		1382	load_perl (aTHX_ &temp);
		1383	}
		1384	}
		1385	}
		1386
		1387	SV *
		1388	is_ready (SV *coro_sv)
		1389	PROTOTYPE: $
		1390	ALIAS:
		1391	is_ready = CF_READY
		1392	is_running = CF_RUNNING
		1393	is_new = CF_NEW
		1394	is_destroyed = CF_DESTROYED
		1395	CODE:
		1396	struct coro *coro = SvSTATE (coro_sv);
		1397	RETVAL = boolSV (coro->flags & ix);
		1398	OUTPUT:
		1399	RETVAL
		1400
		1401
1104	MODULE = Coro::State PACKAGE = Coro	1402	MODULE = Coro::State PACKAGE = Coro
1105		1403
1106	BOOT:	1404	BOOT:
1107	{	1405	{
1108	int i;	1406	int i;
…		…
1114	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1412	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1115	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1413	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1116	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1414	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1117	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1415	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1118		1416
1119	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1417	coro_current = get_sv ("Coro::current", FALSE);
1120	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1418	SvREADONLY_on (coro_current);
1121		1419
1122	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1420	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1123	coro_ready[i] = newAV ();	1421	coro_ready[i] = newAV ();
1124		1422
1125	{	1423	{
1126	SV *sv = perl_get_sv("Coro::API", 1);	1424	SV *sv = perl_get_sv("Coro::API", 1);
1127		1425
1128	coroapi.schedule = api_schedule;	1426	coroapi.schedule = api_schedule;
		1427	coroapi.save = api_save;
1129	coroapi.cede = api_cede;	1428	coroapi.cede = api_cede;
		1429	coroapi.cede_notself = api_cede_notself;
1130	coroapi.ready = api_ready;	1430	coroapi.ready = api_ready;
		1431	coroapi.is_ready = api_is_ready;
1131	coroapi.nready = &coro_nready;	1432	coroapi.nready = &coro_nready;
1132	coroapi.current = coro_current;	1433	coroapi.current = coro_current;
1133		1434
1134	GCoroAPI = &coroapi;	1435	GCoroAPI = &coroapi;
1135	sv_setiv (sv, (IV)&coroapi);	1436	sv_setiv (sv, (IV)&coroapi);
1136	SvREADONLY_on (sv);	1437	SvREADONLY_on (sv);
1137	}	1438	}
1138	}	1439	}
		1440
		1441	void
		1442	_set_current (SV *current)
		1443	PROTOTYPE: $
		1444	CODE:
		1445	SvREFCNT_dec (SvRV (coro_current));
		1446	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1139		1447
1140	int	1448	int
1141	prio (Coro::State coro, int newprio = 0)	1449	prio (Coro::State coro, int newprio = 0)
1142	ALIAS:	1450	ALIAS:
1143	nice = 1	1451	nice = 1
…		…
1146	RETVAL = coro->prio;	1454	RETVAL = coro->prio;
1147		1455
1148	if (items > 1)	1456	if (items > 1)
1149	{	1457	{
1150	if (ix)	1458	if (ix)
1151	newprio += coro->prio;	1459	newprio = coro->prio - newprio;
1152		1460
1153	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1461	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1154	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1462	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1155		1463
1156	coro->prio = newprio;	1464	coro->prio = newprio;
1157	}	1465	}
1158	}	1466	}
		1467	OUTPUT:
		1468	RETVAL
1159		1469
1160	void	1470	SV *
1161	ready (SV *self)	1471	ready (SV *self)
1162	PROTOTYPE: $	1472	PROTOTYPE: $
1163	CODE:	1473	CODE:
1164	api_ready (self);	1474	RETVAL = boolSV (api_ready (self));
		1475	OUTPUT:
		1476	RETVAL
1165		1477
1166	int	1478	int
1167	nready (...)	1479	nready (...)
1168	PROTOTYPE:	1480	PROTOTYPE:
1169	CODE:	1481	CODE:
…		…
1175		1487
1176	SV *	1488	SV *
1177	_get_state ()	1489	_get_state ()
1178	CODE:	1490	CODE:
1179	{	1491	{
1180	struct {	1492	struct io_state *data;
1181	int errorno;
1182	int laststype;
1183	int laststatval;
1184	Stat_t statcache;
1185	} data;
1186		1493
		1494	RETVAL = newSV (sizeof (struct io_state));
		1495	data = (struct io_state *)SvPVX (RETVAL);
		1496	SvCUR_set (RETVAL, sizeof (struct io_state));
		1497	SvPOK_only (RETVAL);
		1498
1187	data.errorno = errno;	1499	data->errorno = errno;
1188	data.laststype = PL_laststype;	1500	data->laststype = PL_laststype;
1189	data.laststatval = PL_laststatval;	1501	data->laststatval = PL_laststatval;
1190	data.statcache = PL_statcache;	1502	data->statcache = PL_statcache;
1191
1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
1193	}	1503	}
1194	OUTPUT:	1504	OUTPUT:
1195	RETVAL	1505	RETVAL
1196		1506
1197	void	1507	void
1198	_set_state (char *data_)	1508	_set_state (char *data_)
1199	PROTOTYPE: $	1509	PROTOTYPE: $
1200	CODE:	1510	CODE:
1201	{	1511	{
1202	struct {	1512	struct io_state *data = (void *)data_;
1203	int errorno;
1204	int laststype;
1205	int laststatval;
1206	Stat_t statcache;
1207	} *data = (void *)data_;
1208		1513
1209	errno = data->errorno;	1514	errno = data->errorno;
1210	PL_laststype = data->laststype;	1515	PL_laststype = data->laststype;
1211	PL_laststatval = data->laststatval;	1516	PL_laststatval = data->laststatval;
1212	PL_statcache = data->statcache;	1517	PL_statcache = data->statcache;
1213	}	1518	}
		1519

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