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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 1.158 by root, Fri Sep 21 02:23:48 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
74	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
76	* and should be unique. */	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
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
79		97
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		99
82	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	103	#else
85	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
86	#endif	106	#endif
87		107
88	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
89		109
90	#include "CoroAPI.h"	110	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		111
94	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	116	#else
99	# define LOCK (void)0	117	# define LOCK (void)0
100	# define UNLOCK (void)0	118	# define UNLOCK (void)0
101	#endif	119	#endif
102		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
107		136
108	static struct coro_cctx *cctx_first;	137	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	138	static int cctx_count, cctx_idle;
…		…
112	typedef struct coro_cctx {	141	typedef struct coro_cctx {
113	struct coro_cctx *next;	142	struct coro_cctx *next;
114		143
115	/* the stack */	144	/* the stack */
116	void *sptr;	145	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
118		147
119	/* cpu state */	148	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	151	JMPENV *top_env;
122	coro_context cctx;	152	coro_context cctx;
123		153
124	#if USE_VALGRIND	154	#if CORO_USE_VALGRIND
125	int valgrind_id;	155	int valgrind_id;
126	#endif	156	#endif
		157	char inuse, mapped;
127	} coro_cctx;	158	} coro_cctx;
		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
128		166
129	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
130	struct coro {	168	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	170	coro_cctx *cctx;
133		171
134	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
135	AV *args;	173	AV *args;
136	int refcnt;	174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
137		177
138	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
139	AV *defav;	179	AV *defav; /* @_ */
140	SV *defsv;	180	SV *defsv; /* $_ */
141	SV *errsv;	181	SV *errsv; /* $@ */
		182	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
142		185
143	#define VAR(name,type) type name;	186	#define VAR(name,type) type name;
144	# include "state.h"	187	# include "state.h"
145	#undef VAR	188	#undef VAR
146		189
147	/* coro process data */	190	/* coro process data */
148	int prio;	191	int prio;
		192
		193	/* linked list */
		194	struct coro *next, *prev;
		195	HV *hv; /* the perl hash associated with this coro, if any */
149	};	196	};
150		197
151	typedef struct coro *Coro__State;	198	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	199	typedef struct coro *Coro__State_or_hashref;
153		200
		201	/** Coro ********************************************************************/
		202
		203	#define PRIO_MAX 3
		204	#define PRIO_HIGH 1
		205	#define PRIO_NORMAL 0
		206	#define PRIO_LOW -1
		207	#define PRIO_IDLE -3
		208	#define PRIO_MIN -4
		209
		210	/* for Coro.pm */
		211	static SV *coro_current;
		212	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		213	static int coro_nready;
		214	static struct coro *coro_first;
		215
		216	/** lowlevel stuff **********************************************************/
		217
154	static AV *	218	static AV *
155	coro_clone_padlist (CV *cv)	219	coro_clone_padlist (pTHX_ CV *cv)
156	{	220	{
157	AV *padlist = CvPADLIST (cv);	221	AV *padlist = CvPADLIST (cv);
158	AV *newpadlist, *newpad;	222	AV *newpadlist, *newpad;
159		223
160	newpadlist = newAV ();	224	newpadlist = newAV ();
…		…
172		236
173	return newpadlist;	237	return newpadlist;
174	}	238	}
175		239
176	static void	240	static void
177	free_padlist (AV *padlist)	241	free_padlist (pTHX_ AV *padlist)
178	{	242	{
179	/* may be during global destruction */	243	/* may be during global destruction */
180	if (SvREFCNT (padlist))	244	if (SvREFCNT (padlist))
181	{	245	{
182	I32 i = AvFILLp (padlist);	246	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	267	AV *padlist;
204	AV *av = (AV *)mg->mg_obj;	268	AV *av = (AV *)mg->mg_obj;
205		269
206	/* casting is fun. */	270	/* casting is fun. */
207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	271	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
208	free_padlist (padlist);	272	free_padlist (aTHX_ padlist);
209		273
210	SvREFCNT_dec (av);	274	SvREFCNT_dec (av);
211		275
212	return 0;	276	return 0;
213	}	277	}
…		…
223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	287	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
224	: 0	288	: 0
225		289
226	/* the next two functions merely cache the padlists */	290	/* the next two functions merely cache the padlists */
227	static void	291	static void
228	get_padlist (CV *cv)	292	get_padlist (pTHX_ CV *cv)
229	{	293	{
230	MAGIC *mg = CORO_MAGIC (cv);	294	MAGIC *mg = CORO_MAGIC (cv);
231	AV *av;	295	AV *av;
232		296
233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	297	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	298	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	299	else
236	{	300	{
237	#if 0	301	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this is probably cleaner, but also slower? */	302	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (cv);	303	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	304	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	305	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	306	SvREFCNT_dec (cp);
243	#else	307	#else
244	CvPADLIST (cv) = coro_clone_padlist (cv);	308	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
245	#endif	309	#endif
246	}	310	}
247	}	311	}
248		312
249	static void	313	static void
250	put_padlist (CV *cv)	314	put_padlist (pTHX_ CV *cv)
251	{	315	{
252	MAGIC *mg = CORO_MAGIC (cv);	316	MAGIC *mg = CORO_MAGIC (cv);
253	AV *av;	317	AV *av;
254		318
255	if (!mg)	319	if (!mg)
…		…
266	av_extend (av, AvMAX (av) + 1);	330	av_extend (av, AvMAX (av) + 1);
267		331
268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	332	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	333	}
270		334
		335	/** load & save, init *******************************************************/
		336
271	#define SB do {	337	#define SB do {
272	#define SE } while (0)	338	#define SE } while (0)
273		339
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	340	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
278		341
279	static void	342	static void
280	load_state(Coro__State c)	343	load_perl (pTHX_ Coro__State c)
281	{	344	{
282	#define VAR(name,type) PL_ ## name = c->name;	345	#define VAR(name,type) PL_ ## name = c->name;
283	# include "state.h"	346	# include "state.h"
284	#undef VAR	347	#undef VAR
285		348
286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	349	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	350	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	351	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		352	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		353
		354	if (c->irssv)
		355	{
		356	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		357	{
		358	SvREFCNT_dec (c->irssv);
		359	c->irssv = 0;
		360	}
		361	else
		362	{
		363	REPLACE_SV (PL_rs, c->irssv);
		364	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		365	sv_setsv (c->irssv_sv, PL_rs);
		366	}
		367	}
289		368
290	{	369	{
291	dSP;	370	dSP;
292	CV *cv;	371	CV *cv;
293		372
294	/* now do the ugly restore mess */	373	/* now do the ugly restore mess */
295	while ((cv = (CV *)POPs))	374	while ((cv = (CV *)POPs))
296	{	375	{
297	put_padlist (cv); /* mark this padlist as available */	376	put_padlist (aTHX_ cv); /* mark this padlist as available */
298	CvDEPTH (cv) = PTR2IV (POPs);	377	CvDEPTH (cv) = PTR2IV (POPs);
299	CvPADLIST (cv) = (AV *)POPs;	378	CvPADLIST (cv) = (AV *)POPs;
300	}	379	}
301		380
302	PUTBACK;	381	PUTBACK;
303	}	382	}
304	}	383	}
305		384
306	static void	385	static void
307	save_state(Coro__State c, int flags)	386	save_perl (pTHX_ Coro__State c)
308	{	387	{
309	{	388	{
310	dSP;	389	dSP;
311	I32 cxix = cxstack_ix;	390	I32 cxix = cxstack_ix;
312	PERL_CONTEXT *ccstk = cxstack;	391	PERL_CONTEXT *ccstk = cxstack;
…		…
315	/*	394	/*
316	* the worst thing you can imagine happens first - we have to save	395	* the worst thing you can imagine happens first - we have to save
317	* (and reinitialize) all cv's in the whole callchain :(	396	* (and reinitialize) all cv's in the whole callchain :(
318	*/	397	*/
319		398
320	PUSHs (Nullsv);	399	XPUSHs (Nullsv);
321	/* this loop was inspired by pp_caller */	400	/* this loop was inspired by pp_caller */
322	for (;;)	401	for (;;)
323	{	402	{
324	while (cxix >= 0)	403	while (cxix >= 0)
325	{	404	{
326	PERL_CONTEXT *cx = &ccstk[cxix--];	405	PERL_CONTEXT *cx = &ccstk[cxix--];
327		406
328	if (CxTYPE(cx) == CXt_SUB)	407	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
329	{	408	{
330	CV *cv = cx->blk_sub.cv;	409	CV *cv = cx->blk_sub.cv;
331		410
332	if (CvDEPTH (cv))	411	if (CvDEPTH (cv))
333	{	412	{
334	EXTEND (SP, 3);	413	EXTEND (SP, 3);
335
336	PUSHs ((SV *)CvPADLIST(cv));	414	PUSHs ((SV *)CvPADLIST (cv));
337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	415	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
338	PUSHs ((SV *)cv);	416	PUSHs ((SV *)cv);
339		417
340	CvDEPTH (cv) = 0;	418	CvDEPTH (cv) = 0;
341	get_padlist (cv);	419	get_padlist (aTHX_ cv);
342	}	420	}
343	}	421	}
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	}	422	}
353		423
354	if (top_si->si_type == PERLSI_MAIN)	424	if (top_si->si_type == PERLSI_MAIN)
355	break;	425	break;
356		426
357	top_si = top_si->si_prev;	427	top_si = top_si->si_prev;
358	ccstk = top_si->si_cxstack;	428	ccstk = top_si->si_cxstack;
359	cxix = top_si->si_cxix;	429	cxix = top_si->si_cxix;
360	}	430	}
361		431
362	PUTBACK;	432	PUTBACK;
363	}	433	}
364		434
365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	435	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;	436	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	437	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		438	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		439	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
368		440
369	#define VAR(name,type)c->name = PL_ ## name;	441	#define VAR(name,type)c->name = PL_ ## name;
370	# include "state.h"	442	# include "state.h"
371	#undef VAR	443	#undef VAR
372	}	444	}
…		…
375	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
376	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
377	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
378	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
379	*/	451	*/
		452	#if CORO_PREFER_PERL_FUNCTIONS
		453	# define coro_init_stacks init_stacks
		454	#else
380	static void	455	static void
381	coro_init_stacks ()	456	coro_init_stacks (pTHX)
382	{	457	{
383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	458	PL_curstackinfo = new_stackinfo(64, 6);
384	PL_curstackinfo->si_type = PERLSI_MAIN;	459	PL_curstackinfo->si_type = PERLSI_MAIN;
385	PL_curstack = PL_curstackinfo->si_stack;	460	PL_curstack = PL_curstackinfo->si_stack;
386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
387		462
388	PL_stack_base = AvARRAY(PL_curstack);	463	PL_stack_base = AvARRAY(PL_curstack);
389	PL_stack_sp = PL_stack_base;	464	PL_stack_sp = PL_stack_base;
390	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
391		466
392	New(50,PL_tmps_stack,96,SV*);	467	New(50,PL_tmps_stack,64,SV*);
393	PL_tmps_floor = -1;	468	PL_tmps_floor = -1;
394	PL_tmps_ix = -1;	469	PL_tmps_ix = -1;
395	PL_tmps_max = 96;	470	PL_tmps_max = 64;
396		471
397	New(54,PL_markstack,16,I32);	472	New(54,PL_markstack,16,I32);
398	PL_markstack_ptr = PL_markstack;	473	PL_markstack_ptr = PL_markstack;
399	PL_markstack_max = PL_markstack + 16;	474	PL_markstack_max = PL_markstack + 16;
400		475
…		…
404		479
405	New(54,PL_scopestack,16,I32);	480	New(54,PL_scopestack,16,I32);
406	PL_scopestack_ix = 0;	481	PL_scopestack_ix = 0;
407	PL_scopestack_max = 16;	482	PL_scopestack_max = 16;
408		483
409	New(54,PL_savestack,96,ANY);	484	New(54,PL_savestack,64,ANY);
410	PL_savestack_ix = 0;	485	PL_savestack_ix = 0;
411	PL_savestack_max = 96;	486	PL_savestack_max = 64;
412		487
413	#if !PERL_VERSION_ATLEAST (5,9,0)	488	#if !PERL_VERSION_ATLEAST (5,9,0)
414	New(54,PL_retstack,8,OP*);	489	New(54,PL_retstack,4,OP*);
415	PL_retstack_ix = 0;	490	PL_retstack_ix = 0;
416	PL_retstack_max = 8;	491	PL_retstack_max = 4;
417	#endif	492	#endif
418	}	493	}
		494	#endif
419		495
420	/*	496	/*
421	* destroy the stacks, the callchain etc...	497	* destroy the stacks, the callchain etc...
422	*/	498	*/
423	static void	499	static void
424	coro_destroy_stacks ()	500	coro_destroy_stacks (pTHX)
425	{	501	{
426	if (!IN_DESTRUCT)	502	if (!IN_DESTRUCT)
427	{	503	{
428	/* is this ugly, I ask? */	504	/* restore all saved variables and stuff */
429	LEAVE_SCOPE (0);	505	LEAVE_SCOPE (0);
		506	assert (PL_tmps_floor == -1);
430		507
431	/* sure it is, but more important: is it correct?? :/ */	508	/* free all temporaries */
432	FREETMPS;	509	FREETMPS;
		510	assert (PL_tmps_ix == -1);
433		511
		512	/* unwind all extra stacks */
434	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	513	POPSTACK_TO (PL_mainstack);
		514
		515	/* unwind main stack */
		516	dounwind (-1);
435	}	517	}
436		518
437	while (PL_curstackinfo->si_next)	519	while (PL_curstackinfo->si_next)
438	PL_curstackinfo = PL_curstackinfo->si_next;	520	PL_curstackinfo = PL_curstackinfo->si_next;
439		521
440	while (PL_curstackinfo)	522	while (PL_curstackinfo)
441	{	523	{
442	PERL_SI *p = PL_curstackinfo->si_prev;	524	PERL_SI *p = PL_curstackinfo->si_prev;
443		525
444	{ /*D*//*remove*/
445	dSP;
446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
447	PUTBACK; /* possibly superfluous */
448	}
449
450	if (!IN_DESTRUCT)	526	if (!IN_DESTRUCT)
451	{
452	dounwind (-1);/*D*//*remove*/
453	SvREFCNT_dec (PL_curstackinfo->si_stack);	527	SvREFCNT_dec (PL_curstackinfo->si_stack);
454	}
455		528
456	Safefree (PL_curstackinfo->si_cxstack);	529	Safefree (PL_curstackinfo->si_cxstack);
457	Safefree (PL_curstackinfo);	530	Safefree (PL_curstackinfo);
458	PL_curstackinfo = p;	531	PL_curstackinfo = p;
459	}	532	}
…		…
465	#if !PERL_VERSION_ATLEAST (5,9,0)	538	#if !PERL_VERSION_ATLEAST (5,9,0)
466	Safefree (PL_retstack);	539	Safefree (PL_retstack);
467	#endif	540	#endif
468	}	541	}
469		542
		543	static size_t
		544	coro_rss (struct coro *coro)
		545	{
		546	size_t rss = sizeof (coro);
		547
		548	if (coro->mainstack)
		549	{
		550	if (coro->flags & CF_RUNNING)
		551	{
		552	#define VAR(name,type)coro->name = PL_ ## name;
		553	# include "state.h"
		554	#undef VAR
		555	}
		556
		557	rss += sizeof (coro->curstackinfo);
		558	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		559	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		561	rss += coro->tmps_max * sizeof (SV *);
		562	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		563	rss += coro->scopestack_max * sizeof (I32);
		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
470	static void	576	static void
471	setup_coro (struct coro *coro)	577	setup_coro (pTHX_ struct coro *coro)
472	{	578	{
473	/*	579	/*
474	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
475	*/	581	*/
476
477	coro_init_stacks ();	582	coro_init_stacks (aTHX);
478		583
		584	PL_curcop = &PL_compiling;
		585	PL_in_eval = EVAL_NULL;
479	PL_curcop = 0;	586	PL_comppad = 0;
480	PL_in_eval = 0;
481	PL_curpm = 0;	587	PL_curpm = 0;
		588	PL_localizing = 0;
		589	PL_dirty = 0;
		590	PL_restartop = 0;
482		591
483	{	592	{
484	dSP;	593	dSP;
485	LOGOP myop;	594	LOGOP myop;
486		595
487	/* I have no idea why this is needed, but it is */
488	PUSHMARK (SP);
489
490	SvREFCNT_dec (GvAV (PL_defgv));	596	SvREFCNT_dec (GvAV (PL_defgv));
491	GvAV (PL_defgv) = coro->args; coro->args = 0;	597	GvAV (PL_defgv) = coro->args; coro->args = 0;
492		598
493	Zero (&myop, 1, LOGOP);	599	Zero (&myop, 1, LOGOP);
494	myop.op_next = Nullop;	600	myop.op_next = Nullop;
495	myop.op_flags = OPf_WANT_VOID;	601	myop.op_flags = OPf_WANT_VOID;
496		602
		603	PUSHMARK (SP);
		604	XPUSHs (av_shift (GvAV (PL_defgv)));
		605	PUTBACK;
497	PL_op = (OP *)&myop;	606	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);	607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
503	SPAGAIN;	608	SPAGAIN;
504
505	ENTER; /* necessary e.g. for dounwind */
506	}	609	}
507	}
508		610
		611	ENTER; /* necessary e.g. for dounwind */
		612	}
		613
509	static void	614	static void
510	free_coro_mortal ()	615	free_coro_mortal (pTHX)
511	{	616	{
512	if (coro_mortal)	617	if (coro_mortal)
513	{	618	{
514	SvREFCNT_dec (coro_mortal);	619	SvREFCNT_dec (coro_mortal);
515	coro_mortal = 0;	620	coro_mortal = 0;
516	}	621	}
517	}	622	}
518		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 */
519	static void NOINLINE	627	static void NOINLINE
520	prepare_cctx (coro_cctx *cctx)	628	prepare_cctx (pTHX_ coro_cctx *cctx)
521	{	629	{
522	dSP;	630	dSP;
523	LOGOP myop;	631	LOGOP myop;
524		632
525	Zero (&myop, 1, LOGOP);	633	Zero (&myop, 1, LOGOP);
526	myop.op_next = PL_op;	634	myop.op_next = PL_op;
527	myop.op_flags = OPf_WANT_VOID;	635	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
528
529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
530		636
531	PUSHMARK (SP);	637	PUSHMARK (SP);
		638	EXTEND (SP, 2);
		639	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	640	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
533	PUTBACK;	641	PUTBACK;
		642	PL_op = (OP *)&myop;
534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535	SPAGAIN;	644	SPAGAIN;
536	}	645	}
537		646
		647	/*
		648	* this is a _very_ stripped down perl interpreter ;)
		649	*/
538	static void	650	static void
539	coro_run (void *arg)	651	coro_run (void *arg)
540	{	652	{
		653	dTHX;
		654
541	/* coro_run is the alternative epilogue of transfer() */	655	/* coro_run is the alternative tail of transfer(), so unlock here. */
542	UNLOCK;	656	UNLOCK;
543		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
544	/*	667	/*
545	* 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
546	*/	673	*/
547	PL_top_env = &PL_start_env;	674	PL_top_env = main_top_env;
548		675	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	}	676	}
558		677
559	static coro_cctx *	678	static coro_cctx *
560	cctx_new ()	679	cctx_new ()
561	{	680	{
562	coro_cctx *cctx;	681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
563		684
564	++cctx_count;	685	++cctx_count;
565		686
566	New (0, cctx, 1, coro_cctx);	687	Newz (0, cctx, 1, coro_cctx);
567		688
568	#if HAVE_MMAP	689	#if HAVE_MMAP
569		690
570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
571	/* mmap suppsedly does allocate-on-write for us */	692	/* 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);	693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
573		694
574	if (cctx->sptr == (void *)-1)	695	if (cctx->sptr != (void *)-1)
575	{
576	perror ("FATAL: unable to mmap stack for coroutine");
577	_exit (EXIT_FAILURE);
578	}	696	{
579
580	# if STACKGUARD	697	# if CORO_STACKGUARD
581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
582	# 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);
583		709
584	#else
585
586	cctx->ssize = STACKSIZE * (long)sizeof (long);
587	New (0, cctx->sptr, STACKSIZE, long);
588
589	if (!cctx->sptr)	710	if (!cctx->sptr)
590	{	711	{
591	perror ("FATAL: unable to malloc stack for coroutine");	712	perror ("FATAL: unable to allocate stack for coroutine");
592	_exit (EXIT_FAILURE);	713	_exit (EXIT_FAILURE);
593	}	714	}
594		715
595	#endif	716	stack_start = cctx->sptr;
		717	stack_size = cctx->ssize;
		718	}
596		719
597	#if USE_VALGRIND	720	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);	721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
605		722
606	return cctx;	723	return cctx;
607	}	724	}
608		725
609	static void	726	static void
610	cctx_free (coro_cctx *cctx)	727	cctx_destroy (coro_cctx *cctx)
611	{	728	{
612	if (!cctx)	729	if (!cctx)
613	return;	730	return;
614		731
615	--cctx_count;	732	--cctx_count;
616		733
617	#if USE_VALGRIND	734	#if CORO_USE_VALGRIND
618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
619	#endif	736	#endif
620		737
621	#if HAVE_MMAP	738	#if HAVE_MMAP
		739	if (cctx->mapped)
622	munmap (cctx->sptr, cctx->ssize);	740	munmap (cctx->sptr, cctx->ssize);
623	#else	741	else
		742	#endif
624	Safefree (cctx->sptr);	743	Safefree (cctx->sptr);
625	#endif
626		744
627	Safefree (cctx);	745	Safefree (cctx);
628	}	746	}
629		747
630	static coro_cctx *	748	static coro_cctx *
631	cctx_get ()	749	cctx_get (pTHX)
632	{	750	{
633	coro_cctx *cctx;
634
635	if (cctx_first)	751	while (cctx_first)
636	{	752	{
		753	coro_cctx *cctx = cctx_first;
		754	cctx_first = cctx->next;
637	--cctx_idle;	755	--cctx_idle;
638	cctx = cctx_first;	756
639	cctx_first = cctx->next;	757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
640	}	761	}
641	else	762
642	{
643	cctx = cctx_new ();
644	PL_op = PL_op->op_next;	763	PL_op = PL_op->op_next;
645	}
646
647	return cctx;	764	return cctx_new ();
648	}	765	}
649		766
650	static void	767	static void
651	cctx_put (coro_cctx *cctx)	768	cctx_put (coro_cctx *cctx)
652	{	769	{
		770	/* free another cctx if overlimit */
		771	if (cctx_idle >= MAX_IDLE_CCTX)
		772	{
		773	coro_cctx *first = cctx_first;
		774	cctx_first = first->next;
		775	--cctx_idle;
		776
		777	assert (!first->inuse);
		778	cctx_destroy (first);
		779	}
		780
653	++cctx_idle;	781	++cctx_idle;
654	cctx->next = cctx_first;	782	cctx->next = cctx_first;
655	cctx_first = cctx;	783	cctx_first = cctx;
656	}	784	}
657		785
		786	/** coroutine switching *****************************************************/
		787
658	/* never call directly, always through the coro_state_transfer global variable */	788	/* never call directly, always through the coro_state_transfer global variable */
659	static void NOINLINE	789	static void NOINLINE
660	transfer (struct coro *prev, struct coro *next, int flags)	790	transfer (pTHX_ struct coro *prev, struct coro *next)
661	{	791	{
662	dSTACKLEVEL;	792	dSTACKLEVEL;
663		793
664	/* sometimes transfer is only called to set idle_sp */	794	/* sometimes transfer is only called to set idle_sp */
665	if (flags == TRANSFER_SET_STACKLEVEL)	795	if (!next)
		796	{
666	((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	}
667	else if (prev != next)	800	else if (prev != next)
668	{	801	{
669	coro_cctx *prev__cctx;	802	coro_cctx *prev__cctx;
670		803
		804	if (prev->flags & CF_NEW)
		805	{
		806	/* create a new empty context */
		807	Newz (0, prev->cctx, 1, coro_cctx);
		808	prev->cctx->inuse = 1;
		809	prev->flags &= ~CF_NEW;
		810	prev->flags |= CF_RUNNING;
		811	}
		812
		813	/*TODO: must not croak here */
		814	if (!prev->flags & CF_RUNNING)
		815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		816
		817	if (next->flags & CF_RUNNING)
		818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		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
		823	prev->flags &= ~CF_RUNNING;
		824	next->flags |= CF_RUNNING;
		825
671	LOCK;	826	LOCK;
672		827
673	if (next->mainstack)	828	if (next->flags & CF_NEW)
674	{	829	{
675	/* coroutine already started */	830	/* need to start coroutine */
676	SAVE (prev, flags);	831	next->flags &= ~CF_NEW;
677	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);
678	}	838	}
679	else	839	else
680	{	840	{
681	/* need to start coroutine */	841	/* coroutine already started */
682	/* first get rid of the old state */	842	save_perl (aTHX_ prev);
683	SAVE (prev, -1);	843	load_perl (aTHX_ next);
684	/* setup coroutine call */
685	setup_coro (next);
686	/* need a stack */
687	next->cctx = 0;
688	}	844	}
689
690	if (!prev->cctx)
691	/* create a new empty context */
692	Newz (0, prev->cctx, 1, coro_cctx);
693		845
694	prev__cctx = prev->cctx;	846	prev__cctx = prev->cctx;
695		847
696	/* possibly "free" the cctx */	848	/* possibly "free" the cctx */
697	if (prev__cctx->idle_sp == STACKLEVEL)	849	if (prev__cctx->idle_sp == STACKLEVEL)
698	{	850	{
699	assert (PL_top_env == prev__cctx->top_env);//D	851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		853
		854	prev->cctx = 0;
		855
700	cctx_put (prev__cctx);	856	cctx_put (prev__cctx);
701	prev->cctx = 0;	857	prev__cctx->inuse = 0;
702	}	858	}
703		859
704	if (!next->cctx)	860	if (!next->cctx)
		861	{
705	next->cctx = cctx_get ();	862	next->cctx = cctx_get (aTHX);
		863	assert (!next->cctx->inuse);
		864	next->cctx->inuse = 1;
		865	}
706		866
707	if (prev__cctx != next->cctx)	867	if (prev__cctx != next->cctx)
708	{	868	{
709	prev__cctx->top_env = PL_top_env;	869	prev__cctx->top_env = PL_top_env;
710	PL_top_env = next->cctx->top_env;	870	PL_top_env = next->cctx->top_env;
711	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
712	}	872	}
713		873
714	free_coro_mortal ();	874	free_coro_mortal (aTHX);
715
716	UNLOCK;	875	UNLOCK;
717	}	876	}
718	}	877	}
719		878
720	struct transfer_args	879	struct transfer_args
721	{	880	{
722	struct coro *prev, *next;	881	struct coro *prev, *next;
723	int flags;
724	};	882	};
725		883
726	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
727		885
		886	/** high level stuff ********************************************************/
		887
728	static void	888	static int
729	coro_state_destroy (struct coro *coro)	889	coro_state_destroy (pTHX_ struct coro *coro)
730	{	890	{
731	if (coro->refcnt--)	891	if (coro->flags & CF_DESTROYED)
732	return;	892	return 0;
		893
		894	coro->flags |= CF_DESTROYED;
		895
		896	if (coro->flags & CF_READY)
		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 */
733		906
734	if (coro->mainstack && coro->mainstack != main_mainstack)	907	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	908	{
736	struct coro temp;	909	struct coro temp;
737		910
738	SAVE ((&temp), TRANSFER_SAVE_ALL);	911	assert (!(coro->flags & CF_RUNNING));
739	LOAD (coro);
740		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
741	coro_destroy_stacks ();	922	coro_destroy_stacks (aTHX);
742		923
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
744		925
745	coro->mainstack = 0;	926	coro->mainstack = 0;
746	}	927	}
747		928
748	cctx_free (coro->cctx);	929	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	930	SvREFCNT_dec (coro->args);
750	Safefree (coro);	931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == coro_first) coro_first = coro->next;
		935
		936	return 1;
751	}	937	}
752		938
753	static int	939	static int
754	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	940	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
755	{	941	{
756	struct coro *coro = (struct coro *)mg->mg_ptr;	942	struct coro *coro = (struct coro *)mg->mg_ptr;
757	mg->mg_ptr = 0;	943	mg->mg_ptr = 0;
758		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
759	coro_state_destroy (coro);	949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
760		952
761	return 0;	953	return 0;
762	}	954	}
763		955
764	static int	956	static int
…		…
771	return 0;	963	return 0;
772	}	964	}
773		965
774	static MGVTBL coro_state_vtbl = {	966	static MGVTBL coro_state_vtbl = {
775	0, 0, 0, 0,	967	0, 0, 0, 0,
776	coro_state_clear,	968	coro_state_free,
777	0,	969	0,
778	#ifdef MGf_DUP	970	#ifdef MGf_DUP
779	coro_state_dup,	971	coro_state_dup,
780	#else	972	#else
781	# define MGf_DUP 0	973	# define MGf_DUP 0
782	#endif	974	#endif
783	};	975	};
784		976
785	static struct coro *	977	static struct coro *
786	SvSTATE (SV *coro)	978	SvSTATE_ (pTHX_ SV *coro)
787	{	979	{
788	HV *stash;	980	HV *stash;
789	MAGIC *mg;	981	MAGIC *mg;
790		982
791	if (SvROK (coro))	983	if (SvROK (coro))
…		…
797	/* very slow, but rare, check */	989	/* very slow, but rare, check */
798	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
799	croak ("Coro::State object required");	991	croak ("Coro::State object required");
800	}	992	}
801		993
802	mg = SvMAGIC (coro);	994	mg = CORO_MAGIC (coro);
803	assert (mg->mg_type == PERL_MAGIC_ext);
804	return (struct coro *)mg->mg_ptr;	995	return (struct coro *)mg->mg_ptr;
805	}	996	}
806		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
807	static void	1000	static void
808	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)
809	{	1002	{
810	ta->prev = SvSTATE (prev);	1003	ta->prev = SvSTATE (prev_sv);
811	ta->next = SvSTATE (next);	1004	ta->next = SvSTATE (next_sv);
812	ta->flags = flags;
813	}	1005	}
814		1006
815	static void	1007	static void
816	api_transfer (SV *prev, SV *next, int flags)	1008	api_transfer (SV *prev_sv, SV *next_sv)
817	{	1009	{
818	dTHX;	1010	dTHX;
819	struct transfer_args ta;	1011	struct transfer_args ta;
820		1012
821	prepare_transfer (&ta, prev, next, flags);	1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
822	TRANSFER (ta);	1014	TRANSFER (ta);
823	}	1015	}
824		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
825	/** Coro ********************************************************************/	1030	/** Coro ********************************************************************/
826		1031
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	1032	static void
840	coro_enq (SV *sv)	1033	coro_enq (pTHX_ SV *coro_sv)
841	{	1034	{
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);	1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
850	coro_nready++;
851	}	1036	}
852		1037
853	static SV *	1038	static SV *
854	coro_deq (int min_prio)	1039	coro_deq (pTHX_ int min_prio)
855	{	1040	{
856	int prio = PRIO_MAX - PRIO_MIN;	1041	int prio = PRIO_MAX - PRIO_MIN;
857		1042
858	min_prio -= PRIO_MIN;	1043	min_prio -= PRIO_MIN;
859	if (min_prio < 0)	1044	if (min_prio < 0)
860	min_prio = 0;	1045	min_prio = 0;
861		1046
862	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
863	if (AvFILLp (coro_ready [prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
864	{
865	coro_nready--;
866	return av_shift (coro_ready [prio]);	1049	return av_shift (coro_ready [prio]);
867	}
868		1050
869	return 0;	1051	return 0;
870	}	1052	}
871		1053
872	static void	1054	static int
873	api_ready (SV *coro)	1055	api_ready (SV *coro_sv)
874	{	1056	{
875	dTHX;	1057	dTHX;
		1058	struct coro *coro;
876		1059
877	if (SvROK (coro))	1060	if (SvROK (coro_sv))
878	coro = SvRV (coro);	1061	coro_sv = SvRV (coro_sv);
		1062
		1063	coro = SvSTATE (coro_sv);
		1064
		1065	if (coro->flags & CF_READY)
		1066	return 0;
		1067
		1068	coro->flags |= CF_READY;
879		1069
880	LOCK;	1070	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1072	++coro_nready;
882	UNLOCK;	1073	UNLOCK;
883	}
884		1074
		1075	return 1;
		1076	}
		1077
885	static void	1078	static int
		1079	api_is_ready (SV *coro_sv)
		1080	{
		1081	dTHX;
		1082	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1083	}
		1084
		1085	static void
886	prepare_schedule (struct transfer_args *ta)	1086	prepare_schedule (pTHX_ struct transfer_args *ta)
887	{	1087	{
888	SV *current, *prev, *next;	1088	SV *prev_sv, *next_sv;
889
890	current = GvSV (coro_current);
891		1089
892	for (;;)	1090	for (;;)
893	{	1091	{
894	LOCK;	1092	LOCK;
895	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;
896	UNLOCK;	1125	UNLOCK;
897
898	if (next)
899	break;	1126	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	}	1127	}
914	}
915
916	prev = SvRV (current);
917	SvRV (current) = next;
918		1128
919	/* 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
920	LOCK;	1137	LOCK;
921	free_coro_mortal ();	1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
922	UNLOCK;	1140	UNLOCK;
923	coro_mortal = prev;
924
925	ta->prev = SvSTATE (prev);
926	ta->next = SvSTATE (next);
927	ta->flags = TRANSFER_SAVE_ALL;
928	}	1141	}
929		1142
930	static void	1143	static void
931	prepare_cede (struct transfer_args *ta)	1144	prepare_cede (pTHX_ struct transfer_args *ta)
932	{	1145	{
933	LOCK;	1146	api_ready (coro_current);
934	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
935	UNLOCK;
936
937	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;
938	}	1162	}
939		1163
940	static void	1164	static void
941	api_schedule (void)	1165	api_schedule (void)
942	{	1166	{
943	dTHX;	1167	dTHX;
944	struct transfer_args ta;	1168	struct transfer_args ta;
945		1169
946	prepare_schedule (&ta);	1170	prepare_schedule (aTHX_ &ta);
947	TRANSFER (ta);	1171	TRANSFER (ta);
948	}	1172	}
949		1173
950	static void	1174	static int
951	api_cede (void)	1175	api_cede (void)
952	{	1176	{
953	dTHX;	1177	dTHX;
954	struct transfer_args ta;	1178	struct transfer_args ta;
955		1179
956	prepare_cede (&ta);	1180	prepare_cede (aTHX_ &ta);
		1181
		1182	if (ta.prev != ta.next)
		1183	{
957	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;
958	}	1204	}
959		1205
960	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
961		1207
962	PROTOTYPES: DISABLE	1208	PROTOTYPES: DISABLE
…		…
968	#endif	1214	#endif
969	BOOT_PAGESIZE;	1215	BOOT_PAGESIZE;
970		1216
971	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
972		1218
973	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
974	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
975	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));
976		1226
977	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;
978		1232
979	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
980	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
981		1235
982	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
990	HV *hv;	1244	HV *hv;
991	int i;	1245	int i;
992		1246
993	Newz (0, coro, 1, struct coro);	1247	Newz (0, coro, 1, struct coro);
994	coro->args = newAV ();	1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
		1250	coro->flags = CF_NEW;
995		1251
		1252	if (coro_first) coro_first->prev = coro;
		1253	coro->next = coro_first;
		1254	coro_first = coro;
		1255
996	hv = newHV ();	1256	coro->hv = hv = newHV ();
997	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;
998	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
999		1259
1000	for (i = 1; i < items; i++)	1260	for (i = 1; i < items; i++)
1001	av_push (coro->args, newSVsv (ST (i)));	1261	av_push (coro->args, newSVsv (ST (i)));
1002	}	1262	}
1003	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:
1004	RETVAL	1282	RETVAL
1005		1283
1006	void	1284	void
1007	_set_stacklevel (...)	1285	_set_stacklevel (...)
1008	ALIAS:	1286	ALIAS:
1009	Coro::State::transfer = 1	1287	Coro::State::transfer = 1
1010	Coro::schedule = 2	1288	Coro::schedule = 2
1011	Coro::cede = 3	1289	Coro::cede = 3
1012	Coro::Cont::yield = 4	1290	Coro::cede_notself = 4
1013	CODE:	1291	CODE:
1014	{	1292	{
1015	struct transfer_args ta;	1293	struct transfer_args ta;
1016		1294
1017	switch (ix)	1295	switch (ix)
1018	{	1296	{
1019	case 0:	1297	case 0:
1020	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1021	ta.next = 0;	1299	ta.next = 0;
1022	ta.flags = TRANSFER_SET_STACKLEVEL;
1023	break;	1300	break;
1024		1301
1025	case 1:	1302	case 1:
1026	if (items != 3)	1303	if (items != 2)
1027	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);
1028		1305
1029	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1030	break;	1307	break;
1031		1308
1032	case 2:	1309	case 2:
1033	prepare_schedule (&ta);	1310	prepare_schedule (aTHX_ &ta);
1034	break;	1311	break;
1035		1312
1036	case 3:	1313	case 3:
1037	prepare_cede (&ta);	1314	prepare_cede (aTHX_ &ta);
1038	break;	1315	break;
1039		1316
1040	case 4:	1317	case 4:
1041	{	1318	if (!prepare_cede_notself (aTHX_ &ta))
1042	SV *yieldstack;	1319	XSRETURN_EMPTY;
1043	SV *sv;
1044	AV *defav = GvAV (PL_defgv);
1045		1320
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;	1321	break;
1065
1066	}	1322	}
1067		1323
		1324	BARRIER;
1068	TRANSFER (ta);	1325	TRANSFER (ta);
1069	}
1070		1326
1071	void	1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
1072	_clone_state_from (SV *dst, SV *src)	1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
1073	CODE:	1333	CODE:
1074	{	1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1075	struct coro *coro_src = SvSTATE (src);	1335	OUTPUT:
1076		1336	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		1337
1083	void	1338	void
1084	_exit (code)	1339	_exit (code)
1085	int code	1340	int code
1086	PROTOTYPE: $	1341	PROTOTYPE: $
1087	CODE:	1342	CODE:
1088	_exit (code);	1343	_exit (code);
1089		1344
1090	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
1091	cctx_count ()	1355	cctx_count ()
1092	CODE:	1356	CODE:
1093	RETVAL = cctx_count;	1357	RETVAL = cctx_count;
1094	OUTPUT:	1358	OUTPUT:
1095	RETVAL	1359	RETVAL
…		…
1099	CODE:	1363	CODE:
1100	RETVAL = cctx_idle;	1364	RETVAL = cctx_idle;
1101	OUTPUT:	1365	OUTPUT:
1102	RETVAL	1366	RETVAL
1103		1367
		1368	void
		1369	list ()
		1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = 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
1104	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1105		1438
1106	BOOT:	1439	BOOT:
1107	{	1440	{
1108	int i;	1441	int i;
…		…
1114	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1115	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1116	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1117	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1118		1451
1119	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1120	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1121		1454
1122	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1123	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1124		1457
1125	{	1458	{
1126	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1127		1460
1128	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
1129	coroapi.cede = api_cede;	1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1130	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
		1466	coroapi.is_ready = api_is_ready;
1131	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1132	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1133		1469
1134	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1135	sv_setiv (sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1136	SvREADONLY_on (sv);	1472	SvREADONLY_on (sv);
1137	}	1473	}
1138	}	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)));
1139		1482
1140	int	1483	int
1141	prio (Coro::State coro, int newprio = 0)	1484	prio (Coro::State coro, int newprio = 0)
1142	ALIAS:	1485	ALIAS:
1143	nice = 1	1486	nice = 1
…		…
1146	RETVAL = coro->prio;	1489	RETVAL = coro->prio;
1147		1490
1148	if (items > 1)	1491	if (items > 1)
1149	{	1492	{
1150	if (ix)	1493	if (ix)
1151	newprio += coro->prio;	1494	newprio = coro->prio - newprio;
1152		1495
1153	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1154	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1155		1498
1156	coro->prio = newprio;	1499	coro->prio = newprio;
1157	}	1500	}
1158	}	1501	}
		1502	OUTPUT:
		1503	RETVAL
1159		1504
1160	void	1505	SV *
1161	ready (SV *self)	1506	ready (SV *self)
1162	PROTOTYPE: $	1507	PROTOTYPE: $
1163	CODE:	1508	CODE:
1164	api_ready (self);	1509	RETVAL = boolSV (api_ready (self));
		1510	OUTPUT:
		1511	RETVAL
1165		1512
1166	int	1513	int
1167	nready (...)	1514	nready (...)
1168	PROTOTYPE:	1515	PROTOTYPE:
1169	CODE:	1516	CODE:
…		…
1175		1522
1176	SV *	1523	SV *
1177	_get_state ()	1524	_get_state ()
1178	CODE:	1525	CODE:
1179	{	1526	{
1180	struct {	1527	struct io_state *data;
1181	int errorno;
1182	int laststype;
1183	int laststatval;
1184	Stat_t statcache;
1185	} data;
1186		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
1187	data.errorno = errno;	1534	data->errorno = errno;
1188	data.laststype = PL_laststype;	1535	data->laststype = PL_laststype;
1189	data.laststatval = PL_laststatval;	1536	data->laststatval = PL_laststatval;
1190	data.statcache = PL_statcache;	1537	data->statcache = PL_statcache;
1191
1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
1193	}	1538	}
1194	OUTPUT:	1539	OUTPUT:
1195	RETVAL	1540	RETVAL
1196		1541
1197	void	1542	void
1198	_set_state (char *data_)	1543	_set_state (char *data_)
1199	PROTOTYPE: $	1544	PROTOTYPE: $
1200	CODE:	1545	CODE:
1201	{	1546	{
1202	struct {	1547	struct io_state *data = (void *)data_;
1203	int errorno;
1204	int laststype;
1205	int laststatval;
1206	Stat_t statcache;
1207	} *data = (void *)data_;
1208		1548
1209	errno = data->errorno;	1549	errno = data->errorno;
1210	PL_laststype = data->laststype;	1550	PL_laststype = data->laststype;
1211	PL_laststatval = data->laststatval;	1551	PL_laststatval = data->laststatval;
1212	PL_statcache = data->statcache;	1552	PL_statcache = data->statcache;
1213	}	1553	}
		1554

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