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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.102 by root, Mon Nov 27 01:28:03 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"
		10
		11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		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
8		47
9	#define PERL_VERSION_ATLEAST(a,b,c) \	48	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	49	(PERL_REVISION > (a) \
11	|| (PERL_REVISION == (a) \	50	|| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	51	&& (PERL_VERSION > (b) \
…		…
31	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
33	# endif	72	# endif
34	#endif	73	#endif
35		74
36	#include <stdio.h>	75	/* 5.8.7 */
37	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
38		79
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	81	# undef CORO_STACKGUARD
41	#endif
42
43	#ifndef STACKGUARD
44	# define STACKGUARD 0
45	#endif
46
47	#ifdef HAVE_MMAP
48	# include <unistd.h>
49	# include <sys/mman.h>
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif	82	#endif
57	# include <limits.h>	83
58	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
59	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
65	#endif	91	#endif
66		92
67	/* 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
68	* 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
69	* and should be unique. */	95	* and should be unique. */
…		…
72		98
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		100
75	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
76	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
77	#else	104	#else
78	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
79	#endif	107	#endif
80		108
81	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
82		110
83	#include "CoroAPI.h"	111	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		112
87	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	117	#else
92	# define LOCK (void)0	118	# define LOCK (void)0
93	# define UNLOCK (void)0	119	# define UNLOCK (void)0
94	#endif	120	#endif
95		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;
96	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
97	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;
98	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
99	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
100		137
		138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
101	/* this is a structure representing a c-level coroutine */	141	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	142	typedef struct coro_cctx {
103	struct coro_stack *next;	143	struct coro_cctx *next;
104		144
105	/* the stack */	145	/* the stack */
106	void *sptr;	146	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
108		148
109	/* cpu state */	149	/* cpu state */
110	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 */
111	JMPENV *top_env;	152	JMPENV *top_env;
112	coro_context cctx;	153	coro_context cctx;
113	} coro_stack;	154
		155	#if CORO_USE_VALGRIND
		156	int valgrind_id;
		157	#endif
		158	char inuse, mapped;
		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	};
114		167
115	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
116	struct coro {	169	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	171	coro_cctx *cctx;
119		172
120	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
121	AV *args;	174	AV *args;
122	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
123		178
124	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
125	AV *defav;	180	AV *defav; /* @_ */
126	SV *defsv;	181	SV *defsv; /* $_ */
127	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
128		186
129	/* saved global state not related to stacks */	187	#define VAR(name,type) type name;
130	U8 dowarn;	188	# include "state.h"
131	I32 in_eval;	189	#undef VAR
132
133	/* the stacks and related info (callchain etc..) */
134	PERL_SI *curstackinfo;
135	AV *curstack;
136	AV *mainstack;
137	SV **stack_sp;
138	OP *op;
139	SV **curpad;
140	AV *comppad;
141	CV *compcv;
142	SV **stack_base;
143	SV **stack_max;
144	SV **tmps_stack;
145	I32 tmps_floor;
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		190
163	/* coro process data */	191	/* coro process data */
164	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 */
165	};	197	};
166		198
167	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
169		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
170	static AV *	219	static AV *
171	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
172	{	221	{
173	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
175		224
176	newpadlist = newAV ();	225	newpadlist = newAV ();
…		…
188		237
189	return newpadlist;	238	return newpadlist;
190	}	239	}
191		240
192	static void	241	static void
193	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
194	{	243	{
195	/* may be during global destruction */	244	/* may be during global destruction */
196	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
197	{	246	{
198	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	268	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
221		270
222	/* casting is fun. */	271	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
225		274
226	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
227		276
228	return 0;	277	return 0;
229	}	278	}
230		279
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		281
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		283
		284	#define CORO_MAGIC(cv) \
		285	SvMAGIC (cv) \
		286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		287	? SvMAGIC (cv) \
		288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		289	: 0
		290
235	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
236	static void	292	static void
237	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
238	{	294	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
240		297
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	300	else
244	{	301	{
245	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
251	#else	308	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	310	#endif
254	}	311	}
255	}	312	}
256		313
257	static void	314	static void
258	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
259	{	316	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
261		319
262	if (!mg)	320	if (!mg)
263	{	321	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
268	}	326	}
269		327
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	328	av = (AV *)mg->mg_obj;
		329
		330	if (AvFILLp (av) >= AvMAX (av))
		331	av_extend (av, AvMAX (av) + 1);
		332
		333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
271	}	334	}
		335
		336	/** load & save, init *******************************************************/
272		337
273	#define SB do {	338	#define SB do {
274	#define SE } while (0)	339	#define SE } while (0)
275		340
276	#define LOAD(state) load_state((state));
277	#define SAVE(state,flags) save_state((state),(flags));
278
279	#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
280		342
281	static void	343	static void
282	load_state(Coro__State c)	344	load_perl (pTHX_ Coro__State c)
283	{	345	{
284	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	347	# include "state.h"
286		348	#undef VAR
287	PL_curstackinfo = c->curstackinfo;
288	PL_curstack = c->curstack;
289	PL_mainstack = c->mainstack;
290	PL_stack_sp = c->stack_sp;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317		349
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	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	}
321		369
322	{	370	{
323	dSP;	371	dSP;
324	CV *cv;	372	CV *cv;
325		373
326	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
328	{	376	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
335	}	379	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	380	}
339		381
340	PUTBACK;	382	PUTBACK;
341	}	383	}
342	}	384	}
343		385
344	static void	386	static void
345	save_state(Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
346	{	388	{
347	{	389	{
348	dSP;	390	dSP;
349	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	395	/*
354	* 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
355	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
356	*/	398	*/
357		399
		400	EXTEND (SP, 3 + 1);
358	PUSHs (Nullsv);	401	PUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
360	for (;;)	403	for (;;)
361	{	404	{
362	while (cxix >= 0)	405	while (cxix >= 0)
363	{	406	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
365		408
366	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
367	{	410	{
368	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
369	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
370	{	414	{
371	EXTEND (SP, CvDEPTH(cv)*2);	415	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
382		419
		420	CvDEPTH (cv) = 0;
383	get_padlist (cv);	421	get_padlist (aTHX_ cv);
384	}	422	}
385	}	423	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	424	}
395		425
396	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
397	break;	427	break;
398		428
…		…
402	}	432	}
403		433
404	PUTBACK;	434	PUTBACK;
405	}	435	}
406		436
407	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;
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
409	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;
410		442
411	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	444	# include "state.h"
413		445	#undef VAR
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;
418	c->op = PL_op;
419	c->curpad = PL_curpad;
420	c->comppad = PL_comppad;
421	c->compcv = PL_compcv;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	446	}
445		447
446	/*	448	/*
447	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
451	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
452	static void	457	static void
453	coro_init_stacks ()	458	coro_init_stacks (pTHX)
454	{	459	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
456	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		464
460	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		468
464	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
465	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	472	PL_tmps_max = 128;
468		473
469	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
470	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
472		477
473	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
475	#endif	480	#endif
476		481
477	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
478	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
480		485
481	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	488	PL_savestack_max = 64;
484		489
485	#if !PERL_VERSION_ATLEAST (5,9,0)	490	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	493	PL_retstack_max = 16;
489	#endif	494	#endif
490	}	495	}
		496	#endif
491		497
492	/*	498	/*
493	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
494	*/	500	*/
495	static void	501	static void
496	coro_destroy_stacks()	502	coro_destroy_stacks (pTHX)
497	{	503	{
498	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
499	{	505	{
500	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
501	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
502		509
503	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
504	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
505		513
		514	/* unwind all extra stacks */
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
507	}	519	}
508		520
509	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
511		523
512	while (PL_curstackinfo)	524	while (PL_curstackinfo)
513	{	525	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
515		527
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		530
528	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	533	PL_curstackinfo = p;
531	}	534	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	540	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	541	Safefree (PL_retstack);
539	#endif	542	#endif
540	}	543	}
541		544
		545	/** coroutine stack handling ************************************************/
		546
542	static void	547	static void
543	setup_coro (struct coro *coro)	548	setup_coro (pTHX_ struct coro *coro)
544	{	549	{
545	/*	550	/*
546	* emulate part of the perl startup here.	551	* emulate part of the perl startup here.
547	*/	552	*/
548
549	coro_init_stacks ();	553	coro_init_stacks (aTHX);
		554
		555	PL_curcop = &PL_compiling;
		556	PL_in_eval = EVAL_NULL;
		557	PL_comppad = 0;
		558	PL_curpm = 0;
		559	PL_localizing = 0;
		560	PL_dirty = 0;
		561	PL_restartop = 0;
550		562
551	{	563	{
552	dSP;	564	dSP;
553	LOGOP myop;	565	LOGOP myop;
554		566
555	/*PL_curcop = 0;*/
556	PL_in_eval = 0;
557	SvREFCNT_dec (GvAV (PL_defgv));	567	SvREFCNT_dec (GvAV (PL_defgv));
558	GvAV (PL_defgv) = coro->args; coro->args = 0;	568	GvAV (PL_defgv) = coro->args; coro->args = 0;
559
560	SPAGAIN;
561		569
562	Zero (&myop, 1, LOGOP);	570	Zero (&myop, 1, LOGOP);
563	myop.op_next = Nullop;	571	myop.op_next = Nullop;
564	myop.op_flags = OPf_WANT_VOID;	572	myop.op_flags = OPf_WANT_VOID;
565		573
		574	PUSHMARK (SP);
		575	XPUSHs (av_shift (GvAV (PL_defgv)));
		576	PUTBACK;
566	PL_op = (OP *)&myop;	577	PL_op = (OP *)&myop;
567
568	PUSHMARK (SP);
569	PUSHMARK (SP);
570	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
571	PUTBACK;
572	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	578	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
573	SPAGAIN;	579	SPAGAIN;
574
575	ENTER; /* necessary e.g. for dounwind */
576	}	580	}
577	}
578		581
		582	ENTER; /* necessary e.g. for dounwind */
		583	}
		584
579	static void	585	static void
580	free_coro_mortal ()	586	free_coro_mortal (pTHX)
581	{	587	{
582	if (coro_mortal)	588	if (coro_mortal)
583	{	589	{
584	SvREFCNT_dec (coro_mortal);	590	SvREFCNT_dec (coro_mortal);
585	coro_mortal = 0;	591	coro_mortal = 0;
586	}	592	}
587	}	593	}
588		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 */
589	static void NOINLINE	598	static void NOINLINE
590	prepare_cctx (coro_stack *cctx)	599	prepare_cctx (pTHX_ coro_cctx *cctx)
591	{	600	{
592	dSP;	601	dSP;
593	LOGOP myop;	602	LOGOP myop;
594		603
595	Zero (&myop, 1, LOGOP);	604	Zero (&myop, 1, LOGOP);
596	myop.op_next = PL_op;	605	myop.op_next = PL_op;
597	myop.op_flags = OPf_WANT_VOID;	606	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
598
599	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
600		607
601	PUSHMARK (SP);	608	PUSHMARK (SP);
		609	EXTEND (SP, 2);
		610	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
602	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	611	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
603	PUTBACK;	612	PUTBACK;
		613	PL_op = (OP *)&myop;
604	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	614	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
605	SPAGAIN;	615	SPAGAIN;
606	}	616	}
607		617
		618	/*
		619	* this is a _very_ stripped down perl interpreter ;)
		620	*/
608	static void	621	static void
609	coro_run (void *arg)	622	coro_run (void *arg)
610	{	623	{
		624	dTHX;
		625
611	/* coro_run is the alternative epilogue of transfer() */	626	/* coro_run is the alternative tail of transfer(), so unlock here. */
612	UNLOCK;	627	UNLOCK;
613		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
614	/*	638	/*
615	* 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
616	*/	644	*/
617	PL_top_env = &PL_start_env;	645	PL_top_env = main_top_env;
618	/* inject call to cctx_init */	646	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
619	prepare_cctx ((coro_stack *)arg);
620
621	/* somebody will hit me for both perl_run and PL_restartop */
622	perl_run (PL_curinterp);
623
624	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
625	abort ();
626	}	647	}
627		648
628	static coro_stack *	649	static coro_cctx *
629	stack_new ()	650	cctx_new ()
630	{	651	{
631	coro_stack *stack;	652	coro_cctx *cctx;
		653	void *stack_start;
		654	size_t stack_size;
632		655
		656	++cctx_count;
		657
633	New (0, stack, 1, coro_stack);	658	Newz (0, cctx, 1, coro_cctx);
634		659
635	#if HAVE_MMAP	660	#if HAVE_MMAP
636		661
637	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	662	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
638	/* mmap suppsedly does allocate-on-write for us */	663	/* mmap supposedly does allocate-on-write for us */
639	stack->sptr = mmap (0, stack->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);
640		665
641	if (stack->sptr == (void *)-1)	666	if (cctx->sptr != (void *)-1)
642	{
643	perror ("FATAL: unable to mmap stack for coroutine");
644	_exit (EXIT_FAILURE);
645	}	667	{
646
647	# if STACKGUARD	668	# if CORO_STACKGUARD
648	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	669	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
649	# endif	670	# endif
650		671	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
651	#else	672	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
652		673	cctx->mapped = 1;
653	stack->ssize = STACKSIZE * (long)sizeof (long);
654	New (0, stack->sptr, STACKSIZE, long);
655
656	if (!stack->sptr)
657	{	674	}
		675	else
		676	#endif
		677	{
		678	cctx->ssize = coro_stacksize * (long)sizeof (long);
		679	New (0, cctx->sptr, coro_stacksize, long);
		680
		681	if (!cctx->sptr)
		682	{
658	perror (stderr, "FATAL: unable to malloc stack for coroutine");	683	perror ("FATAL: unable to allocate stack for coroutine");
659	_exit (EXIT_FAILURE);	684	_exit (EXIT_FAILURE);
660	}	685	}
661		686
662	#endif	687	stack_start = cctx->sptr;
		688	stack_size = cctx->ssize;
		689	}
663		690
		691	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
664	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	692	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
665		693
666	return stack;	694	return cctx;
667	}	695	}
668		696
669	static void	697	static void
670	stack_free (coro_stack *stack)	698	cctx_destroy (coro_cctx *cctx)
671	{	699	{
672	if (!stack)	700	if (!cctx)
673	return;	701	return;
674		702
		703	--cctx_count;
		704
		705	#if CORO_USE_VALGRIND
		706	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		707	#endif
		708
675	#if HAVE_MMAP	709	#if HAVE_MMAP
		710	if (cctx->mapped)
676	munmap (stack->sptr, stack->ssize);	711	munmap (cctx->sptr, cctx->ssize);
677	#else	712	else
		713	#endif
678	Safefree (stack->sptr);	714	Safefree (cctx->sptr);
679	#endif
680		715
681	Safefree (stack);	716	Safefree (cctx);
682	}	717	}
683		718
684	static coro_stack *stack_first;
685	static int cctx_count, cctx_idle;
686
687	static coro_stack *	719	static coro_cctx *
688	stack_get ()	720	cctx_get (pTHX)
689	{	721	{
690	coro_stack *stack;	722	while (cctx_first)
691
692	if (stack_first)
693	{	723	{
		724	coro_cctx *cctx = cctx_first;
		725	cctx_first = cctx->next;
694	--cctx_idle;	726	--cctx_idle;
695	stack = stack_first;	727
696	stack_first = stack->next;	728	if (cctx->ssize >= coro_stacksize)
		729	return cctx;
		730
		731	cctx_destroy (cctx);
697	}	732	}
698	else	733
699	{
700	++cctx_count;
701	stack = stack_new ();
702	PL_op = PL_op->op_next;	734	PL_op = PL_op->op_next;
		735	return cctx_new ();
		736	}
		737
		738	static void
		739	cctx_put (coro_cctx *cctx)
		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);
703	}	750	}
704		751
705	return stack;
706	}
707
708	static void
709	stack_put (coro_stack *stack)
710	{
711	++cctx_idle;	752	++cctx_idle;
712	stack->next = stack_first;	753	cctx->next = cctx_first;
713	stack_first = stack;	754	cctx_first = cctx;
714	}	755	}
		756
		757	/** coroutine switching *****************************************************/
715		758
716	/* never call directly, always through the coro_state_transfer global variable */	759	/* never call directly, always through the coro_state_transfer global variable */
717	static void NOINLINE	760	static void NOINLINE
718	transfer (struct coro *prev, struct coro *next, int flags)	761	transfer (pTHX_ struct coro *prev, struct coro *next)
719	{	762	{
720	dSTACKLEVEL;	763	dSTACKLEVEL;
721		764
722	/* sometimes transfer is only called to set idle_sp */	765	/* sometimes transfer is only called to set idle_sp */
723	if (flags == TRANSFER_SET_STACKLEVEL)	766	if (!next)
		767	{
724	((coro_stack *)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	}
725	else if (prev != next)	771	else if (prev != next)
726	{	772	{
727	coro_stack *prev__stack;	773	coro_cctx *prev__cctx;
		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;
728		796
729	LOCK;	797	LOCK;
730		798
731	if (next->mainstack)	799	if (next->flags & CF_NEW)
732	{	800	{
733	/* coroutine already started */	801	/* need to start coroutine */
734	SAVE (prev, flags);	802	next->flags &= ~CF_NEW;
735	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);
736	}	809	}
737	else	810	else
738	{	811	{
739	/* need to start coroutine */	812	/* coroutine already started */
740	/* first get rid of the old state */	813	save_perl (aTHX_ prev);
741	SAVE (prev, -1);	814	load_perl (aTHX_ next);
742	/* setup coroutine call */
743	setup_coro (next);
744	/* need a stack */
745	next->stack = 0;
746	}	815	}
747		816
748	if (!prev->stack)
749	/* create a new empty context */
750	Newz (0, prev->stack, 1, coro_stack);
751
752	prev__stack = prev->stack;	817	prev__cctx = prev->cctx;
753		818
754	/* possibly "free" the stack */	819	/* possibly "free" the cctx */
755	if (prev__stack->idle_sp == STACKLEVEL)	820	if (prev__cctx->idle_sp == STACKLEVEL)
756	{	821	{
757	stack_put (prev__stack);	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
758	prev->stack = 0;	825	prev->cctx = 0;
		826
		827	cctx_put (prev__cctx);
		828	prev__cctx->inuse = 0;
759	}	829	}
760		830
761	if (!next->stack)	831	if (!next->cctx)
762	next->stack = stack_get ();
763
764	if (prev__stack != next->stack)
765	{	832	{
766	prev__stack->top_env = PL_top_env;	833	next->cctx = cctx_get (aTHX);
767	PL_top_env = next->stack->top_env;	834	assert (!next->cctx->inuse);
768	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	835	next->cctx->inuse = 1;
769	}	836	}
770		837
		838	if (prev__cctx != next->cctx)
		839	{
		840	prev__cctx->top_env = PL_top_env;
		841	PL_top_env = next->cctx->top_env;
		842	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		843	}
		844
771	free_coro_mortal ();	845	free_coro_mortal (aTHX);
772
773	UNLOCK;	846	UNLOCK;
774	}	847	}
775	}	848	}
776		849
777	struct transfer_args	850	struct transfer_args
778	{	851	{
779	struct coro *prev, *next;	852	struct coro *prev, *next;
780	int flags;
781	};	853	};
782		854
783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	855	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
784		856
		857	/** high level stuff ********************************************************/
		858
785	static void	859	static int
786	coro_state_destroy (struct coro *coro)	860	coro_state_destroy (pTHX_ struct coro *coro)
787	{	861	{
788	if (coro->refcnt--)	862	if (coro->flags & CF_DESTROYED)
789	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 */
790		877
791	if (coro->mainstack && coro->mainstack != main_mainstack)	878	if (coro->mainstack && coro->mainstack != main_mainstack)
792	{	879	{
793	struct coro temp;	880	struct coro temp;
794		881
795	SAVE ((&temp), TRANSFER_SAVE_ALL);	882	assert (!(coro->flags & CF_RUNNING));
796	LOAD (coro);
797		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
798	coro_destroy_stacks ();	893	coro_destroy_stacks (aTHX);
799		894
800	LOAD ((&temp)); /* this will get rid of defsv etc.. */	895	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
801		896
802	coro->mainstack = 0;	897	coro->mainstack = 0;
803	}	898	}
804		899
805	stack_free (coro->stack);	900	cctx_destroy (coro->cctx);
806	SvREFCNT_dec (coro->args);	901	SvREFCNT_dec (coro->args);
807	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;
808	}	908	}
809		909
810	static int	910	static int
811	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	911	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
812	{	912	{
813	struct coro *coro = (struct coro *)mg->mg_ptr;	913	struct coro *coro = (struct coro *)mg->mg_ptr;
814	mg->mg_ptr = 0;	914	mg->mg_ptr = 0;
815		915
		916	coro->hv = 0;
		917
		918	if (--coro->refcnt < 0)
		919	{
816	coro_state_destroy (coro);	920	coro_state_destroy (aTHX_ coro);
		921	Safefree (coro);
		922	}
817		923
818	return 0;	924	return 0;
819	}	925	}
820		926
821	static int	927	static int
…		…
828	return 0;	934	return 0;
829	}	935	}
830		936
831	static MGVTBL coro_state_vtbl = {	937	static MGVTBL coro_state_vtbl = {
832	0, 0, 0, 0,	938	0, 0, 0, 0,
833	coro_state_clear,	939	coro_state_free,
834	0,	940	0,
835	#ifdef MGf_DUP	941	#ifdef MGf_DUP
836	coro_state_dup,	942	coro_state_dup,
837	#else	943	#else
838	# define MGf_DUP 0	944	# define MGf_DUP 0
839	#endif	945	#endif
840	};	946	};
841		947
842	static struct coro *	948	static struct coro *
843	SvSTATE (SV *coro)	949	SvSTATE_ (pTHX_ SV *coro)
844	{	950	{
845	HV *stash;	951	HV *stash;
846	MAGIC *mg;	952	MAGIC *mg;
847		953
848	if (SvROK (coro))	954	if (SvROK (coro))
…		…
854	/* very slow, but rare, check */	960	/* very slow, but rare, check */
855	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	961	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
856	croak ("Coro::State object required");	962	croak ("Coro::State object required");
857	}	963	}
858		964
859	mg = SvMAGIC (coro);	965	mg = CORO_MAGIC (coro);
860	assert (mg->mg_type == PERL_MAGIC_ext);
861	return (struct coro *)mg->mg_ptr;	966	return (struct coro *)mg->mg_ptr;
862	}	967	}
863		968
		969	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		970
864	static void	971	static void
865	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)
866	{	973	{
867	ta->prev = SvSTATE (prev);	974	ta->prev = SvSTATE (prev_sv);
868	ta->next = SvSTATE (next);	975	ta->next = SvSTATE (next_sv);
869	ta->flags = flags;
870	}	976	}
871		977
872	static void	978	static void
873	api_transfer (SV *prev, SV *next, int flags)	979	api_transfer (SV *prev_sv, SV *next_sv)
874	{	980	{
875	dTHX;	981	dTHX;
876	struct transfer_args ta;	982	struct transfer_args ta;
877		983
878	prepare_transfer (&ta, prev, next, flags);	984	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
879	TRANSFER (ta);	985	TRANSFER (ta);
880	}	986	}
881		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
882	/** Coro ********************************************************************/	1001	/** Coro ********************************************************************/
883		1002
884	#define PRIO_MAX 3
885	#define PRIO_HIGH 1
886	#define PRIO_NORMAL 0
887	#define PRIO_LOW -1
888	#define PRIO_IDLE -3
889	#define PRIO_MIN -4
890
891	/* for Coro.pm */
892	static GV *coro_current, *coro_idle;
893	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
894	static int coro_nready;
895
896	static void	1003	static void
897	coro_enq (SV *sv)	1004	coro_enq (pTHX_ SV *coro_sv)
898	{	1005	{
899	int prio;
900
901	if (SvTYPE (sv) != SVt_PVHV)
902	croak ("Coro::ready tried to enqueue something that is not a coroutine");
903
904	prio = SvSTATE (sv)->prio;
905
906	av_push (coro_ready [prio - PRIO_MIN], sv);	1006	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
907	coro_nready++;
908	}	1007	}
909		1008
910	static SV *	1009	static SV *
911	coro_deq (int min_prio)	1010	coro_deq (pTHX_ int min_prio)
912	{	1011	{
913	int prio = PRIO_MAX - PRIO_MIN;	1012	int prio = PRIO_MAX - PRIO_MIN;
914		1013
915	min_prio -= PRIO_MIN;	1014	min_prio -= PRIO_MIN;
916	if (min_prio < 0)	1015	if (min_prio < 0)
917	min_prio = 0;	1016	min_prio = 0;
918		1017
919	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1018	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
920	if (AvFILLp (coro_ready [prio]) >= 0)	1019	if (AvFILLp (coro_ready [prio]) >= 0)
921	{
922	coro_nready--;
923	return av_shift (coro_ready [prio]);	1020	return av_shift (coro_ready [prio]);
924	}
925		1021
926	return 0;	1022	return 0;
927	}	1023	}
928		1024
929	static void	1025	static int
930	api_ready (SV *coro)	1026	api_ready (SV *coro_sv)
931	{	1027	{
932	dTHX;	1028	dTHX;
		1029	struct coro *coro;
933		1030
934	if (SvROK (coro))	1031	if (SvROK (coro_sv))
935	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;
936		1040
937	LOCK;	1041	LOCK;
938	coro_enq (SvREFCNT_inc (coro));	1042	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1043	++coro_nready;
939	UNLOCK;	1044	UNLOCK;
940	}
941		1045
		1046	return 1;
		1047	}
		1048
942	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
943	prepare_schedule (struct transfer_args *ta)	1057	prepare_schedule (pTHX_ struct transfer_args *ta)
944	{	1058	{
945	SV *current, *prev, *next;	1059	SV *prev_sv, *next_sv;
946
947	current = GvSV (coro_current);
948		1060
949	for (;;)	1061	for (;;)
950	{	1062	{
951	LOCK;	1063	LOCK;
952	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;
953	UNLOCK;	1096	UNLOCK;
954
955	if (next)
956	break;	1097	break;
957
958	{
959	dSP;
960
961	ENTER;
962	SAVETMPS;
963
964	PUSHMARK (SP);
965	PUTBACK;
966	call_sv (GvSV (coro_idle), G_DISCARD);
967
968	FREETMPS;
969	LEAVE;
970	}	1098	}
971	}
972
973	prev = SvRV (current);
974	SvRV (current) = next;
975		1099
976	/* 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
977	LOCK;	1108	LOCK;
978	free_coro_mortal ();	1109	free_coro_mortal (aTHX);
		1110	coro_mortal = prev_sv;
979	UNLOCK;	1111	UNLOCK;
980	coro_mortal = prev;
981
982	ta->prev = SvSTATE (prev);
983	ta->next = SvSTATE (next);
984	ta->flags = TRANSFER_SAVE_ALL;
985	}	1112	}
986		1113
987	static void	1114	static void
988	prepare_cede (struct transfer_args *ta)	1115	prepare_cede (pTHX_ struct transfer_args *ta)
989	{	1116	{
990	LOCK;	1117	api_ready (coro_current);
991	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
992	UNLOCK;
993
994	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;
995	}	1133	}
996		1134
997	static void	1135	static void
998	api_schedule (void)	1136	api_schedule (void)
999	{	1137	{
1000	dTHX;	1138	dTHX;
1001	struct transfer_args ta;	1139	struct transfer_args ta;
1002		1140
1003	prepare_schedule (&ta);	1141	prepare_schedule (aTHX_ &ta);
1004	TRANSFER (ta);	1142	TRANSFER (ta);
1005	}	1143	}
1006		1144
1007	static void	1145	static int
1008	api_cede (void)	1146	api_cede (void)
1009	{	1147	{
1010	dTHX;	1148	dTHX;
1011	struct transfer_args ta;	1149	struct transfer_args ta;
1012		1150
1013	prepare_cede (&ta);	1151	prepare_cede (aTHX_ &ta);
		1152
		1153	if (ta.prev != ta.next)
		1154	{
1014	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;
1015	}	1175	}
1016		1176
1017	MODULE = Coro::State PACKAGE = Coro::State	1177	MODULE = Coro::State PACKAGE = Coro::State
1018		1178
1019	PROTOTYPES: DISABLE	1179	PROTOTYPES: DISABLE
…		…
1025	#endif	1185	#endif
1026	BOOT_PAGESIZE;	1186	BOOT_PAGESIZE;
1027		1187
1028	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1188	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029		1189
1030	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1190	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1031	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1191	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1032	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));
1033		1197
1034	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;
1035		1203
1036	coroapi.ver = CORO_API_VERSION;	1204	coroapi.ver = CORO_API_VERSION;
1037	coroapi.transfer = api_transfer;	1205	coroapi.transfer = api_transfer;
1038		1206
1039	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1207	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1047	HV *hv;	1215	HV *hv;
1048	int i;	1216	int i;
1049		1217
1050	Newz (0, coro, 1, struct coro);	1218	Newz (0, coro, 1, struct coro);
1051	coro->args = newAV ();	1219	coro->args = newAV ();
		1220	coro->save = CORO_SAVE_DEF;
		1221	coro->flags = CF_NEW;
1052		1222
		1223	if (first) first->prev = coro;
		1224	coro->next = first;
		1225	first = coro;
		1226
1053	hv = newHV ();	1227	coro->hv = hv = newHV ();
1054	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;
1055	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1229	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056		1230
1057	for (i = 1; i < items; i++)	1231	for (i = 1; i < items; i++)
1058	av_push (coro->args, newSVsv (ST (i)));	1232	av_push (coro->args, newSVsv (ST (i)));
1059
1060	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1061	/*coro->stack = 0;*/
1062	}	1233	}
1063	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:
1064	RETVAL	1253	RETVAL
1065		1254
1066	void	1255	void
1067	_set_stacklevel (...)	1256	_set_stacklevel (...)
1068	ALIAS:	1257	ALIAS:
1069	Coro::State::transfer = 1	1258	Coro::State::transfer = 1
1070	Coro::schedule = 2	1259	Coro::schedule = 2
1071	Coro::cede = 3	1260	Coro::cede = 3
1072	Coro::Cont::yield = 4	1261	Coro::cede_notself = 4
1073	CODE:	1262	CODE:
1074	{	1263	{
1075	struct transfer_args ta;	1264	struct transfer_args ta;
1076		1265
1077	switch (ix)	1266	switch (ix)
1078	{	1267	{
1079	case 0:	1268	case 0:
1080	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1269	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1081	ta.next = 0;	1270	ta.next = 0;
1082	ta.flags = TRANSFER_SET_STACKLEVEL;
1083	break;	1271	break;
1084		1272
1085	case 1:	1273	case 1:
1086	if (items != 3)	1274	if (items != 2)
1087	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);
1088		1276
1089	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1277	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1090	break;	1278	break;
1091		1279
1092	case 2:	1280	case 2:
1093	prepare_schedule (&ta);	1281	prepare_schedule (aTHX_ &ta);
1094	break;	1282	break;
1095		1283
1096	case 3:	1284	case 3:
1097	prepare_cede (&ta);	1285	prepare_cede (aTHX_ &ta);
1098	break;	1286	break;
1099		1287
1100	case 4:	1288	case 4:
1101	{	1289	if (!prepare_cede_notself (aTHX_ &ta))
1102	SV *yieldstack;	1290	XSRETURN_EMPTY;
1103	SV *sv;
1104	AV *defav = GvAV (PL_defgv);
1105		1291
1106	yieldstack = *hv_fetch (
1107	(HV *)SvRV (GvSV (coro_current)),
1108	"yieldstack", sizeof ("yieldstack") - 1,
1109	0
1110	);
1111
1112	/* set up @_ -- ugly */
1113	av_clear (defav);
1114	av_fill (defav, items - 1);
1115	while (items--)
1116	av_store (defav, items, SvREFCNT_inc (ST(items)));
1117
1118	sv = av_pop ((AV *)SvRV (yieldstack));
1119	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1120	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1121	ta.flags = 0;
1122	SvREFCNT_dec (sv);
1123	}
1124	break;	1292	break;
1125
1126	}	1293	}
1127		1294
		1295	BARRIER;
1128	TRANSFER (ta);	1296	TRANSFER (ta);
1129	}
1130		1297
1131	void	1298	if (GIMME_V != G_VOID && ta.next != ta.prev)
1132	_clone_state_from (SV *dst, SV *src)	1299	XSRETURN_YES;
		1300	}
		1301
		1302	bool
		1303	_destroy (SV *coro_sv)
1133	CODE:	1304	CODE:
1134	{	1305	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1135	struct coro *coro_src = SvSTATE (src);	1306	OUTPUT:
1136		1307	RETVAL
1137	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1138
1139	++coro_src->refcnt;
1140	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1141	}
1142		1308
1143	void	1309	void
1144	_exit (code)	1310	_exit (code)
1145	int code	1311	int code
1146	PROTOTYPE: $	1312	PROTOTYPE: $
1147	CODE:	1313	CODE:
1148	_exit (code);	1314	_exit (code);
1149		1315
		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
		1326	cctx_count ()
		1327	CODE:
		1328	RETVAL = cctx_count;
		1329	OUTPUT:
		1330	RETVAL
		1331
		1332	int
		1333	cctx_idle ()
		1334	CODE:
		1335	RETVAL = cctx_idle;
		1336	OUTPUT:
		1337	RETVAL
		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
1150	MODULE = Coro::State PACKAGE = Coro	1402	MODULE = Coro::State PACKAGE = Coro
1151		1403
1152	BOOT:	1404	BOOT:
1153	{	1405	{
1154	int i;	1406	int i;
…		…
1160	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1412	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1161	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1413	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1162	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1414	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1163	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1415	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1164		1416
1165	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1417	coro_current = get_sv ("Coro::current", FALSE);
1166	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1418	SvREADONLY_on (coro_current);
1167		1419
1168	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1420	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1169	coro_ready[i] = newAV ();	1421	coro_ready[i] = newAV ();
1170		1422
1171	{	1423	{
1172	SV *sv = perl_get_sv("Coro::API", 1);	1424	SV *sv = perl_get_sv("Coro::API", 1);
1173		1425
1174	coroapi.schedule = api_schedule;	1426	coroapi.schedule = api_schedule;
		1427	coroapi.save = api_save;
1175	coroapi.cede = api_cede;	1428	coroapi.cede = api_cede;
		1429	coroapi.cede_notself = api_cede_notself;
1176	coroapi.ready = api_ready;	1430	coroapi.ready = api_ready;
		1431	coroapi.is_ready = api_is_ready;
1177	coroapi.nready = &coro_nready;	1432	coroapi.nready = &coro_nready;
1178	coroapi.current = coro_current;	1433	coroapi.current = coro_current;
1179		1434
1180	GCoroAPI = &coroapi;	1435	GCoroAPI = &coroapi;
1181	sv_setiv (sv, (IV)&coroapi);	1436	sv_setiv (sv, (IV)&coroapi);
1182	SvREADONLY_on (sv);	1437	SvREADONLY_on (sv);
1183	}	1438	}
1184	}	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)));
1185		1447
1186	int	1448	int
1187	prio (Coro::State coro, int newprio = 0)	1449	prio (Coro::State coro, int newprio = 0)
1188	ALIAS:	1450	ALIAS:
1189	nice = 1	1451	nice = 1
…		…
1192	RETVAL = coro->prio;	1454	RETVAL = coro->prio;
1193		1455
1194	if (items > 1)	1456	if (items > 1)
1195	{	1457	{
1196	if (ix)	1458	if (ix)
1197	newprio += coro->prio;	1459	newprio = coro->prio - newprio;
1198		1460
1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1461	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1462	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1201		1463
1202	coro->prio = newprio;	1464	coro->prio = newprio;
1203	}	1465	}
1204	}	1466	}
		1467	OUTPUT:
		1468	RETVAL
1205		1469
1206	void	1470	SV *
1207	ready (SV *self)	1471	ready (SV *self)
1208	PROTOTYPE: $	1472	PROTOTYPE: $
1209	CODE:	1473	CODE:
1210	api_ready (self);	1474	RETVAL = boolSV (api_ready (self));
		1475	OUTPUT:
		1476	RETVAL
1211		1477
1212	int	1478	int
1213	nready (...)	1479	nready (...)
1214	PROTOTYPE:	1480	PROTOTYPE:
1215	CODE:	1481	CODE:
…		…
1221		1487
1222	SV *	1488	SV *
1223	_get_state ()	1489	_get_state ()
1224	CODE:	1490	CODE:
1225	{	1491	{
1226	struct {	1492	struct io_state *data;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} data;
1232		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
1233	data.errorno = errno;	1499	data->errorno = errno;
1234	data.laststype = PL_laststype;	1500	data->laststype = PL_laststype;
1235	data.laststatval = PL_laststatval;	1501	data->laststatval = PL_laststatval;
1236	data.statcache = PL_statcache;	1502	data->statcache = PL_statcache;
1237
1238	RETVAL = newSVpvn ((char *)&data, sizeof data);
1239	}	1503	}
1240	OUTPUT:	1504	OUTPUT:
1241	RETVAL	1505	RETVAL
1242		1506
1243	void	1507	void
1244	_set_state (char *data_)	1508	_set_state (char *data_)
1245	PROTOTYPE: $	1509	PROTOTYPE: $
1246	CODE:	1510	CODE:
1247	{	1511	{
1248	struct {	1512	struct io_state *data = (void *)data_;
1249	int errorno;
1250	int laststype;
1251	int laststatval;
1252	Stat_t statcache;
1253	} *data = (void *)data_;
1254		1513
1255	errno = data->errorno;	1514	errno = data->errorno;
1256	PL_laststype = data->laststype;	1515	PL_laststype = data->laststype;
1257	PL_laststatval = data->laststatval;	1516	PL_laststatval = data->laststatval;
1258	PL_statcache = data->statcache;	1517	PL_statcache = data->statcache;
1259	}	1518	}
		1519

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